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Commit | Line | Data |
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6aa8b732 AK |
1 | /* |
2 | * Kernel-based Virtual Machine driver for Linux | |
3 | * | |
4 | * This module enables machines with Intel VT-x extensions to run virtual | |
5 | * machines without emulation or binary translation. | |
6 | * | |
7 | * Copyright (C) 2006 Qumranet, Inc. | |
9611c187 | 8 | * Copyright 2010 Red Hat, Inc. and/or its affiliates. |
6aa8b732 AK |
9 | * |
10 | * Authors: | |
11 | * Avi Kivity <avi@qumranet.com> | |
12 | * Yaniv Kamay <yaniv@qumranet.com> | |
13 | * | |
14 | * This work is licensed under the terms of the GNU GPL, version 2. See | |
15 | * the COPYING file in the top-level directory. | |
16 | * | |
17 | */ | |
18 | ||
85f455f7 | 19 | #include "irq.h" |
1d737c8a | 20 | #include "mmu.h" |
00b27a3e | 21 | #include "cpuid.h" |
e495606d | 22 | |
edf88417 | 23 | #include <linux/kvm_host.h> |
6aa8b732 | 24 | #include <linux/module.h> |
9d8f549d | 25 | #include <linux/kernel.h> |
6aa8b732 AK |
26 | #include <linux/mm.h> |
27 | #include <linux/highmem.h> | |
e8edc6e0 | 28 | #include <linux/sched.h> |
c7addb90 | 29 | #include <linux/moduleparam.h> |
e9bda3b3 | 30 | #include <linux/mod_devicetable.h> |
af658dca | 31 | #include <linux/trace_events.h> |
5a0e3ad6 | 32 | #include <linux/slab.h> |
cafd6659 | 33 | #include <linux/tboot.h> |
f4124500 | 34 | #include <linux/hrtimer.h> |
5fdbf976 | 35 | #include "kvm_cache_regs.h" |
35920a35 | 36 | #include "x86.h" |
e495606d | 37 | |
28b835d6 | 38 | #include <asm/cpu.h> |
6aa8b732 | 39 | #include <asm/io.h> |
3b3be0d1 | 40 | #include <asm/desc.h> |
13673a90 | 41 | #include <asm/vmx.h> |
6210e37b | 42 | #include <asm/virtext.h> |
a0861c02 | 43 | #include <asm/mce.h> |
952f07ec | 44 | #include <asm/fpu/internal.h> |
d7cd9796 | 45 | #include <asm/perf_event.h> |
81908bf4 | 46 | #include <asm/debugreg.h> |
8f536b76 | 47 | #include <asm/kexec.h> |
dab2087d | 48 | #include <asm/apic.h> |
efc64404 | 49 | #include <asm/irq_remapping.h> |
6aa8b732 | 50 | |
229456fc | 51 | #include "trace.h" |
25462f7f | 52 | #include "pmu.h" |
229456fc | 53 | |
4ecac3fd | 54 | #define __ex(x) __kvm_handle_fault_on_reboot(x) |
5e520e62 AK |
55 | #define __ex_clear(x, reg) \ |
56 | ____kvm_handle_fault_on_reboot(x, "xor " reg " , " reg) | |
4ecac3fd | 57 | |
6aa8b732 AK |
58 | MODULE_AUTHOR("Qumranet"); |
59 | MODULE_LICENSE("GPL"); | |
60 | ||
e9bda3b3 JT |
61 | static const struct x86_cpu_id vmx_cpu_id[] = { |
62 | X86_FEATURE_MATCH(X86_FEATURE_VMX), | |
63 | {} | |
64 | }; | |
65 | MODULE_DEVICE_TABLE(x86cpu, vmx_cpu_id); | |
66 | ||
476bc001 | 67 | static bool __read_mostly enable_vpid = 1; |
736caefe | 68 | module_param_named(vpid, enable_vpid, bool, 0444); |
2384d2b3 | 69 | |
476bc001 | 70 | static bool __read_mostly flexpriority_enabled = 1; |
736caefe | 71 | module_param_named(flexpriority, flexpriority_enabled, bool, S_IRUGO); |
4c9fc8ef | 72 | |
476bc001 | 73 | static bool __read_mostly enable_ept = 1; |
736caefe | 74 | module_param_named(ept, enable_ept, bool, S_IRUGO); |
d56f546d | 75 | |
476bc001 | 76 | static bool __read_mostly enable_unrestricted_guest = 1; |
3a624e29 NK |
77 | module_param_named(unrestricted_guest, |
78 | enable_unrestricted_guest, bool, S_IRUGO); | |
79 | ||
83c3a331 XH |
80 | static bool __read_mostly enable_ept_ad_bits = 1; |
81 | module_param_named(eptad, enable_ept_ad_bits, bool, S_IRUGO); | |
82 | ||
a27685c3 | 83 | static bool __read_mostly emulate_invalid_guest_state = true; |
c1f8bc04 | 84 | module_param(emulate_invalid_guest_state, bool, S_IRUGO); |
04fa4d32 | 85 | |
476bc001 | 86 | static bool __read_mostly vmm_exclusive = 1; |
b923e62e DX |
87 | module_param(vmm_exclusive, bool, S_IRUGO); |
88 | ||
476bc001 | 89 | static bool __read_mostly fasteoi = 1; |
58fbbf26 KT |
90 | module_param(fasteoi, bool, S_IRUGO); |
91 | ||
5a71785d | 92 | static bool __read_mostly enable_apicv = 1; |
01e439be | 93 | module_param(enable_apicv, bool, S_IRUGO); |
83d4c286 | 94 | |
abc4fc58 AG |
95 | static bool __read_mostly enable_shadow_vmcs = 1; |
96 | module_param_named(enable_shadow_vmcs, enable_shadow_vmcs, bool, S_IRUGO); | |
801d3424 NHE |
97 | /* |
98 | * If nested=1, nested virtualization is supported, i.e., guests may use | |
99 | * VMX and be a hypervisor for its own guests. If nested=0, guests may not | |
100 | * use VMX instructions. | |
101 | */ | |
476bc001 | 102 | static bool __read_mostly nested = 0; |
801d3424 NHE |
103 | module_param(nested, bool, S_IRUGO); |
104 | ||
20300099 WL |
105 | static u64 __read_mostly host_xss; |
106 | ||
843e4330 KH |
107 | static bool __read_mostly enable_pml = 1; |
108 | module_param_named(pml, enable_pml, bool, S_IRUGO); | |
109 | ||
64903d61 HZ |
110 | #define KVM_VMX_TSC_MULTIPLIER_MAX 0xffffffffffffffffULL |
111 | ||
5037878e GN |
112 | #define KVM_GUEST_CR0_MASK (X86_CR0_NW | X86_CR0_CD) |
113 | #define KVM_VM_CR0_ALWAYS_ON_UNRESTRICTED_GUEST (X86_CR0_WP | X86_CR0_NE) | |
cdc0e244 AK |
114 | #define KVM_VM_CR0_ALWAYS_ON \ |
115 | (KVM_VM_CR0_ALWAYS_ON_UNRESTRICTED_GUEST | X86_CR0_PG | X86_CR0_PE) | |
4c38609a AK |
116 | #define KVM_CR4_GUEST_OWNED_BITS \ |
117 | (X86_CR4_PVI | X86_CR4_DE | X86_CR4_PCE | X86_CR4_OSFXSR \ | |
52ce3c21 | 118 | | X86_CR4_OSXMMEXCPT | X86_CR4_TSD) |
4c38609a | 119 | |
cdc0e244 AK |
120 | #define KVM_PMODE_VM_CR4_ALWAYS_ON (X86_CR4_PAE | X86_CR4_VMXE) |
121 | #define KVM_RMODE_VM_CR4_ALWAYS_ON (X86_CR4_VME | X86_CR4_PAE | X86_CR4_VMXE) | |
122 | ||
78ac8b47 AK |
123 | #define RMODE_GUEST_OWNED_EFLAGS_BITS (~(X86_EFLAGS_IOPL | X86_EFLAGS_VM)) |
124 | ||
f4124500 JK |
125 | #define VMX_MISC_EMULATED_PREEMPTION_TIMER_RATE 5 |
126 | ||
4b8d54f9 ZE |
127 | /* |
128 | * These 2 parameters are used to config the controls for Pause-Loop Exiting: | |
129 | * ple_gap: upper bound on the amount of time between two successive | |
130 | * executions of PAUSE in a loop. Also indicate if ple enabled. | |
00c25bce | 131 | * According to test, this time is usually smaller than 128 cycles. |
4b8d54f9 ZE |
132 | * ple_window: upper bound on the amount of time a guest is allowed to execute |
133 | * in a PAUSE loop. Tests indicate that most spinlocks are held for | |
134 | * less than 2^12 cycles | |
135 | * Time is measured based on a counter that runs at the same rate as the TSC, | |
136 | * refer SDM volume 3b section 21.6.13 & 22.1.3. | |
137 | */ | |
b4a2d31d RK |
138 | #define KVM_VMX_DEFAULT_PLE_GAP 128 |
139 | #define KVM_VMX_DEFAULT_PLE_WINDOW 4096 | |
140 | #define KVM_VMX_DEFAULT_PLE_WINDOW_GROW 2 | |
141 | #define KVM_VMX_DEFAULT_PLE_WINDOW_SHRINK 0 | |
142 | #define KVM_VMX_DEFAULT_PLE_WINDOW_MAX \ | |
143 | INT_MAX / KVM_VMX_DEFAULT_PLE_WINDOW_GROW | |
144 | ||
4b8d54f9 ZE |
145 | static int ple_gap = KVM_VMX_DEFAULT_PLE_GAP; |
146 | module_param(ple_gap, int, S_IRUGO); | |
147 | ||
148 | static int ple_window = KVM_VMX_DEFAULT_PLE_WINDOW; | |
149 | module_param(ple_window, int, S_IRUGO); | |
150 | ||
b4a2d31d RK |
151 | /* Default doubles per-vcpu window every exit. */ |
152 | static int ple_window_grow = KVM_VMX_DEFAULT_PLE_WINDOW_GROW; | |
153 | module_param(ple_window_grow, int, S_IRUGO); | |
154 | ||
155 | /* Default resets per-vcpu window every exit to ple_window. */ | |
156 | static int ple_window_shrink = KVM_VMX_DEFAULT_PLE_WINDOW_SHRINK; | |
157 | module_param(ple_window_shrink, int, S_IRUGO); | |
158 | ||
159 | /* Default is to compute the maximum so we can never overflow. */ | |
160 | static int ple_window_actual_max = KVM_VMX_DEFAULT_PLE_WINDOW_MAX; | |
161 | static int ple_window_max = KVM_VMX_DEFAULT_PLE_WINDOW_MAX; | |
162 | module_param(ple_window_max, int, S_IRUGO); | |
163 | ||
83287ea4 AK |
164 | extern const ulong vmx_return; |
165 | ||
8bf00a52 | 166 | #define NR_AUTOLOAD_MSRS 8 |
ff2f6fe9 | 167 | #define VMCS02_POOL_SIZE 1 |
61d2ef2c | 168 | |
a2fa3e9f GH |
169 | struct vmcs { |
170 | u32 revision_id; | |
171 | u32 abort; | |
172 | char data[0]; | |
173 | }; | |
174 | ||
d462b819 NHE |
175 | /* |
176 | * Track a VMCS that may be loaded on a certain CPU. If it is (cpu!=-1), also | |
177 | * remember whether it was VMLAUNCHed, and maintain a linked list of all VMCSs | |
178 | * loaded on this CPU (so we can clear them if the CPU goes down). | |
179 | */ | |
180 | struct loaded_vmcs { | |
181 | struct vmcs *vmcs; | |
182 | int cpu; | |
183 | int launched; | |
184 | struct list_head loaded_vmcss_on_cpu_link; | |
185 | }; | |
186 | ||
26bb0981 AK |
187 | struct shared_msr_entry { |
188 | unsigned index; | |
189 | u64 data; | |
d5696725 | 190 | u64 mask; |
26bb0981 AK |
191 | }; |
192 | ||
a9d30f33 NHE |
193 | /* |
194 | * struct vmcs12 describes the state that our guest hypervisor (L1) keeps for a | |
195 | * single nested guest (L2), hence the name vmcs12. Any VMX implementation has | |
196 | * a VMCS structure, and vmcs12 is our emulated VMX's VMCS. This structure is | |
197 | * stored in guest memory specified by VMPTRLD, but is opaque to the guest, | |
198 | * which must access it using VMREAD/VMWRITE/VMCLEAR instructions. | |
199 | * More than one of these structures may exist, if L1 runs multiple L2 guests. | |
200 | * nested_vmx_run() will use the data here to build a vmcs02: a VMCS for the | |
201 | * underlying hardware which will be used to run L2. | |
202 | * This structure is packed to ensure that its layout is identical across | |
203 | * machines (necessary for live migration). | |
204 | * If there are changes in this struct, VMCS12_REVISION must be changed. | |
205 | */ | |
22bd0358 | 206 | typedef u64 natural_width; |
a9d30f33 NHE |
207 | struct __packed vmcs12 { |
208 | /* According to the Intel spec, a VMCS region must start with the | |
209 | * following two fields. Then follow implementation-specific data. | |
210 | */ | |
211 | u32 revision_id; | |
212 | u32 abort; | |
22bd0358 | 213 | |
27d6c865 NHE |
214 | u32 launch_state; /* set to 0 by VMCLEAR, to 1 by VMLAUNCH */ |
215 | u32 padding[7]; /* room for future expansion */ | |
216 | ||
22bd0358 NHE |
217 | u64 io_bitmap_a; |
218 | u64 io_bitmap_b; | |
219 | u64 msr_bitmap; | |
220 | u64 vm_exit_msr_store_addr; | |
221 | u64 vm_exit_msr_load_addr; | |
222 | u64 vm_entry_msr_load_addr; | |
223 | u64 tsc_offset; | |
224 | u64 virtual_apic_page_addr; | |
225 | u64 apic_access_addr; | |
705699a1 | 226 | u64 posted_intr_desc_addr; |
22bd0358 | 227 | u64 ept_pointer; |
608406e2 WV |
228 | u64 eoi_exit_bitmap0; |
229 | u64 eoi_exit_bitmap1; | |
230 | u64 eoi_exit_bitmap2; | |
231 | u64 eoi_exit_bitmap3; | |
81dc01f7 | 232 | u64 xss_exit_bitmap; |
22bd0358 NHE |
233 | u64 guest_physical_address; |
234 | u64 vmcs_link_pointer; | |
235 | u64 guest_ia32_debugctl; | |
236 | u64 guest_ia32_pat; | |
237 | u64 guest_ia32_efer; | |
238 | u64 guest_ia32_perf_global_ctrl; | |
239 | u64 guest_pdptr0; | |
240 | u64 guest_pdptr1; | |
241 | u64 guest_pdptr2; | |
242 | u64 guest_pdptr3; | |
36be0b9d | 243 | u64 guest_bndcfgs; |
22bd0358 NHE |
244 | u64 host_ia32_pat; |
245 | u64 host_ia32_efer; | |
246 | u64 host_ia32_perf_global_ctrl; | |
247 | u64 padding64[8]; /* room for future expansion */ | |
248 | /* | |
249 | * To allow migration of L1 (complete with its L2 guests) between | |
250 | * machines of different natural widths (32 or 64 bit), we cannot have | |
251 | * unsigned long fields with no explict size. We use u64 (aliased | |
252 | * natural_width) instead. Luckily, x86 is little-endian. | |
253 | */ | |
254 | natural_width cr0_guest_host_mask; | |
255 | natural_width cr4_guest_host_mask; | |
256 | natural_width cr0_read_shadow; | |
257 | natural_width cr4_read_shadow; | |
258 | natural_width cr3_target_value0; | |
259 | natural_width cr3_target_value1; | |
260 | natural_width cr3_target_value2; | |
261 | natural_width cr3_target_value3; | |
262 | natural_width exit_qualification; | |
263 | natural_width guest_linear_address; | |
264 | natural_width guest_cr0; | |
265 | natural_width guest_cr3; | |
266 | natural_width guest_cr4; | |
267 | natural_width guest_es_base; | |
268 | natural_width guest_cs_base; | |
269 | natural_width guest_ss_base; | |
270 | natural_width guest_ds_base; | |
271 | natural_width guest_fs_base; | |
272 | natural_width guest_gs_base; | |
273 | natural_width guest_ldtr_base; | |
274 | natural_width guest_tr_base; | |
275 | natural_width guest_gdtr_base; | |
276 | natural_width guest_idtr_base; | |
277 | natural_width guest_dr7; | |
278 | natural_width guest_rsp; | |
279 | natural_width guest_rip; | |
280 | natural_width guest_rflags; | |
281 | natural_width guest_pending_dbg_exceptions; | |
282 | natural_width guest_sysenter_esp; | |
283 | natural_width guest_sysenter_eip; | |
284 | natural_width host_cr0; | |
285 | natural_width host_cr3; | |
286 | natural_width host_cr4; | |
287 | natural_width host_fs_base; | |
288 | natural_width host_gs_base; | |
289 | natural_width host_tr_base; | |
290 | natural_width host_gdtr_base; | |
291 | natural_width host_idtr_base; | |
292 | natural_width host_ia32_sysenter_esp; | |
293 | natural_width host_ia32_sysenter_eip; | |
294 | natural_width host_rsp; | |
295 | natural_width host_rip; | |
296 | natural_width paddingl[8]; /* room for future expansion */ | |
297 | u32 pin_based_vm_exec_control; | |
298 | u32 cpu_based_vm_exec_control; | |
299 | u32 exception_bitmap; | |
300 | u32 page_fault_error_code_mask; | |
301 | u32 page_fault_error_code_match; | |
302 | u32 cr3_target_count; | |
303 | u32 vm_exit_controls; | |
304 | u32 vm_exit_msr_store_count; | |
305 | u32 vm_exit_msr_load_count; | |
306 | u32 vm_entry_controls; | |
307 | u32 vm_entry_msr_load_count; | |
308 | u32 vm_entry_intr_info_field; | |
309 | u32 vm_entry_exception_error_code; | |
310 | u32 vm_entry_instruction_len; | |
311 | u32 tpr_threshold; | |
312 | u32 secondary_vm_exec_control; | |
313 | u32 vm_instruction_error; | |
314 | u32 vm_exit_reason; | |
315 | u32 vm_exit_intr_info; | |
316 | u32 vm_exit_intr_error_code; | |
317 | u32 idt_vectoring_info_field; | |
318 | u32 idt_vectoring_error_code; | |
319 | u32 vm_exit_instruction_len; | |
320 | u32 vmx_instruction_info; | |
321 | u32 guest_es_limit; | |
322 | u32 guest_cs_limit; | |
323 | u32 guest_ss_limit; | |
324 | u32 guest_ds_limit; | |
325 | u32 guest_fs_limit; | |
326 | u32 guest_gs_limit; | |
327 | u32 guest_ldtr_limit; | |
328 | u32 guest_tr_limit; | |
329 | u32 guest_gdtr_limit; | |
330 | u32 guest_idtr_limit; | |
331 | u32 guest_es_ar_bytes; | |
332 | u32 guest_cs_ar_bytes; | |
333 | u32 guest_ss_ar_bytes; | |
334 | u32 guest_ds_ar_bytes; | |
335 | u32 guest_fs_ar_bytes; | |
336 | u32 guest_gs_ar_bytes; | |
337 | u32 guest_ldtr_ar_bytes; | |
338 | u32 guest_tr_ar_bytes; | |
339 | u32 guest_interruptibility_info; | |
340 | u32 guest_activity_state; | |
341 | u32 guest_sysenter_cs; | |
342 | u32 host_ia32_sysenter_cs; | |
0238ea91 JK |
343 | u32 vmx_preemption_timer_value; |
344 | u32 padding32[7]; /* room for future expansion */ | |
22bd0358 | 345 | u16 virtual_processor_id; |
705699a1 | 346 | u16 posted_intr_nv; |
22bd0358 NHE |
347 | u16 guest_es_selector; |
348 | u16 guest_cs_selector; | |
349 | u16 guest_ss_selector; | |
350 | u16 guest_ds_selector; | |
351 | u16 guest_fs_selector; | |
352 | u16 guest_gs_selector; | |
353 | u16 guest_ldtr_selector; | |
354 | u16 guest_tr_selector; | |
608406e2 | 355 | u16 guest_intr_status; |
22bd0358 NHE |
356 | u16 host_es_selector; |
357 | u16 host_cs_selector; | |
358 | u16 host_ss_selector; | |
359 | u16 host_ds_selector; | |
360 | u16 host_fs_selector; | |
361 | u16 host_gs_selector; | |
362 | u16 host_tr_selector; | |
a9d30f33 NHE |
363 | }; |
364 | ||
365 | /* | |
366 | * VMCS12_REVISION is an arbitrary id that should be changed if the content or | |
367 | * layout of struct vmcs12 is changed. MSR_IA32_VMX_BASIC returns this id, and | |
368 | * VMPTRLD verifies that the VMCS region that L1 is loading contains this id. | |
369 | */ | |
370 | #define VMCS12_REVISION 0x11e57ed0 | |
371 | ||
372 | /* | |
373 | * VMCS12_SIZE is the number of bytes L1 should allocate for the VMXON region | |
374 | * and any VMCS region. Although only sizeof(struct vmcs12) are used by the | |
375 | * current implementation, 4K are reserved to avoid future complications. | |
376 | */ | |
377 | #define VMCS12_SIZE 0x1000 | |
378 | ||
ff2f6fe9 NHE |
379 | /* Used to remember the last vmcs02 used for some recently used vmcs12s */ |
380 | struct vmcs02_list { | |
381 | struct list_head list; | |
382 | gpa_t vmptr; | |
383 | struct loaded_vmcs vmcs02; | |
384 | }; | |
385 | ||
ec378aee NHE |
386 | /* |
387 | * The nested_vmx structure is part of vcpu_vmx, and holds information we need | |
388 | * for correct emulation of VMX (i.e., nested VMX) on this vcpu. | |
389 | */ | |
390 | struct nested_vmx { | |
391 | /* Has the level1 guest done vmxon? */ | |
392 | bool vmxon; | |
3573e22c | 393 | gpa_t vmxon_ptr; |
a9d30f33 NHE |
394 | |
395 | /* The guest-physical address of the current VMCS L1 keeps for L2 */ | |
396 | gpa_t current_vmptr; | |
397 | /* The host-usable pointer to the above */ | |
398 | struct page *current_vmcs12_page; | |
399 | struct vmcs12 *current_vmcs12; | |
8de48833 | 400 | struct vmcs *current_shadow_vmcs; |
012f83cb AG |
401 | /* |
402 | * Indicates if the shadow vmcs must be updated with the | |
403 | * data hold by vmcs12 | |
404 | */ | |
405 | bool sync_shadow_vmcs; | |
ff2f6fe9 NHE |
406 | |
407 | /* vmcs02_list cache of VMCSs recently used to run L2 guests */ | |
408 | struct list_head vmcs02_pool; | |
409 | int vmcs02_num; | |
fe3ef05c | 410 | u64 vmcs01_tsc_offset; |
644d711a NHE |
411 | /* L2 must run next, and mustn't decide to exit to L1. */ |
412 | bool nested_run_pending; | |
fe3ef05c NHE |
413 | /* |
414 | * Guest pages referred to in vmcs02 with host-physical pointers, so | |
415 | * we must keep them pinned while L2 runs. | |
416 | */ | |
417 | struct page *apic_access_page; | |
a7c0b07d | 418 | struct page *virtual_apic_page; |
705699a1 WV |
419 | struct page *pi_desc_page; |
420 | struct pi_desc *pi_desc; | |
421 | bool pi_pending; | |
422 | u16 posted_intr_nv; | |
b3897a49 | 423 | u64 msr_ia32_feature_control; |
f4124500 JK |
424 | |
425 | struct hrtimer preemption_timer; | |
426 | bool preemption_timer_expired; | |
2996fca0 JK |
427 | |
428 | /* to migrate it to L2 if VM_ENTRY_LOAD_DEBUG_CONTROLS is off */ | |
429 | u64 vmcs01_debugctl; | |
b9c237bb | 430 | |
5c614b35 WL |
431 | u16 vpid02; |
432 | u16 last_vpid; | |
433 | ||
b9c237bb WV |
434 | u32 nested_vmx_procbased_ctls_low; |
435 | u32 nested_vmx_procbased_ctls_high; | |
436 | u32 nested_vmx_true_procbased_ctls_low; | |
437 | u32 nested_vmx_secondary_ctls_low; | |
438 | u32 nested_vmx_secondary_ctls_high; | |
439 | u32 nested_vmx_pinbased_ctls_low; | |
440 | u32 nested_vmx_pinbased_ctls_high; | |
441 | u32 nested_vmx_exit_ctls_low; | |
442 | u32 nested_vmx_exit_ctls_high; | |
443 | u32 nested_vmx_true_exit_ctls_low; | |
444 | u32 nested_vmx_entry_ctls_low; | |
445 | u32 nested_vmx_entry_ctls_high; | |
446 | u32 nested_vmx_true_entry_ctls_low; | |
447 | u32 nested_vmx_misc_low; | |
448 | u32 nested_vmx_misc_high; | |
449 | u32 nested_vmx_ept_caps; | |
99b83ac8 | 450 | u32 nested_vmx_vpid_caps; |
ec378aee NHE |
451 | }; |
452 | ||
01e439be | 453 | #define POSTED_INTR_ON 0 |
ebbfc765 FW |
454 | #define POSTED_INTR_SN 1 |
455 | ||
01e439be YZ |
456 | /* Posted-Interrupt Descriptor */ |
457 | struct pi_desc { | |
458 | u32 pir[8]; /* Posted interrupt requested */ | |
6ef1522f FW |
459 | union { |
460 | struct { | |
461 | /* bit 256 - Outstanding Notification */ | |
462 | u16 on : 1, | |
463 | /* bit 257 - Suppress Notification */ | |
464 | sn : 1, | |
465 | /* bit 271:258 - Reserved */ | |
466 | rsvd_1 : 14; | |
467 | /* bit 279:272 - Notification Vector */ | |
468 | u8 nv; | |
469 | /* bit 287:280 - Reserved */ | |
470 | u8 rsvd_2; | |
471 | /* bit 319:288 - Notification Destination */ | |
472 | u32 ndst; | |
473 | }; | |
474 | u64 control; | |
475 | }; | |
476 | u32 rsvd[6]; | |
01e439be YZ |
477 | } __aligned(64); |
478 | ||
a20ed54d YZ |
479 | static bool pi_test_and_set_on(struct pi_desc *pi_desc) |
480 | { | |
481 | return test_and_set_bit(POSTED_INTR_ON, | |
482 | (unsigned long *)&pi_desc->control); | |
483 | } | |
484 | ||
485 | static bool pi_test_and_clear_on(struct pi_desc *pi_desc) | |
486 | { | |
487 | return test_and_clear_bit(POSTED_INTR_ON, | |
488 | (unsigned long *)&pi_desc->control); | |
489 | } | |
490 | ||
491 | static int pi_test_and_set_pir(int vector, struct pi_desc *pi_desc) | |
492 | { | |
493 | return test_and_set_bit(vector, (unsigned long *)pi_desc->pir); | |
494 | } | |
495 | ||
ebbfc765 FW |
496 | static inline void pi_clear_sn(struct pi_desc *pi_desc) |
497 | { | |
498 | return clear_bit(POSTED_INTR_SN, | |
499 | (unsigned long *)&pi_desc->control); | |
500 | } | |
501 | ||
502 | static inline void pi_set_sn(struct pi_desc *pi_desc) | |
503 | { | |
504 | return set_bit(POSTED_INTR_SN, | |
505 | (unsigned long *)&pi_desc->control); | |
506 | } | |
507 | ||
508 | static inline int pi_test_on(struct pi_desc *pi_desc) | |
509 | { | |
510 | return test_bit(POSTED_INTR_ON, | |
511 | (unsigned long *)&pi_desc->control); | |
512 | } | |
513 | ||
514 | static inline int pi_test_sn(struct pi_desc *pi_desc) | |
515 | { | |
516 | return test_bit(POSTED_INTR_SN, | |
517 | (unsigned long *)&pi_desc->control); | |
518 | } | |
519 | ||
a2fa3e9f | 520 | struct vcpu_vmx { |
fb3f0f51 | 521 | struct kvm_vcpu vcpu; |
313dbd49 | 522 | unsigned long host_rsp; |
29bd8a78 | 523 | u8 fail; |
9d58b931 | 524 | bool nmi_known_unmasked; |
51aa01d1 | 525 | u32 exit_intr_info; |
1155f76a | 526 | u32 idt_vectoring_info; |
6de12732 | 527 | ulong rflags; |
26bb0981 | 528 | struct shared_msr_entry *guest_msrs; |
a2fa3e9f GH |
529 | int nmsrs; |
530 | int save_nmsrs; | |
a547c6db | 531 | unsigned long host_idt_base; |
a2fa3e9f | 532 | #ifdef CONFIG_X86_64 |
44ea2b17 AK |
533 | u64 msr_host_kernel_gs_base; |
534 | u64 msr_guest_kernel_gs_base; | |
a2fa3e9f | 535 | #endif |
2961e876 GN |
536 | u32 vm_entry_controls_shadow; |
537 | u32 vm_exit_controls_shadow; | |
d462b819 NHE |
538 | /* |
539 | * loaded_vmcs points to the VMCS currently used in this vcpu. For a | |
540 | * non-nested (L1) guest, it always points to vmcs01. For a nested | |
541 | * guest (L2), it points to a different VMCS. | |
542 | */ | |
543 | struct loaded_vmcs vmcs01; | |
544 | struct loaded_vmcs *loaded_vmcs; | |
545 | bool __launched; /* temporary, used in vmx_vcpu_run */ | |
61d2ef2c AK |
546 | struct msr_autoload { |
547 | unsigned nr; | |
548 | struct vmx_msr_entry guest[NR_AUTOLOAD_MSRS]; | |
549 | struct vmx_msr_entry host[NR_AUTOLOAD_MSRS]; | |
550 | } msr_autoload; | |
a2fa3e9f GH |
551 | struct { |
552 | int loaded; | |
553 | u16 fs_sel, gs_sel, ldt_sel; | |
b2da15ac AK |
554 | #ifdef CONFIG_X86_64 |
555 | u16 ds_sel, es_sel; | |
556 | #endif | |
152d3f2f LV |
557 | int gs_ldt_reload_needed; |
558 | int fs_reload_needed; | |
da8999d3 | 559 | u64 msr_host_bndcfgs; |
d974baa3 | 560 | unsigned long vmcs_host_cr4; /* May not match real cr4 */ |
d77c26fc | 561 | } host_state; |
9c8cba37 | 562 | struct { |
7ffd92c5 | 563 | int vm86_active; |
78ac8b47 | 564 | ulong save_rflags; |
f5f7b2fe AK |
565 | struct kvm_segment segs[8]; |
566 | } rmode; | |
567 | struct { | |
568 | u32 bitmask; /* 4 bits per segment (1 bit per field) */ | |
7ffd92c5 AK |
569 | struct kvm_save_segment { |
570 | u16 selector; | |
571 | unsigned long base; | |
572 | u32 limit; | |
573 | u32 ar; | |
f5f7b2fe | 574 | } seg[8]; |
2fb92db1 | 575 | } segment_cache; |
2384d2b3 | 576 | int vpid; |
04fa4d32 | 577 | bool emulation_required; |
3b86cd99 JK |
578 | |
579 | /* Support for vnmi-less CPUs */ | |
580 | int soft_vnmi_blocked; | |
581 | ktime_t entry_time; | |
582 | s64 vnmi_blocked_time; | |
a0861c02 | 583 | u32 exit_reason; |
4e47c7a6 | 584 | |
01e439be YZ |
585 | /* Posted interrupt descriptor */ |
586 | struct pi_desc pi_desc; | |
587 | ||
ec378aee NHE |
588 | /* Support for a guest hypervisor (nested VMX) */ |
589 | struct nested_vmx nested; | |
a7653ecd RK |
590 | |
591 | /* Dynamic PLE window. */ | |
592 | int ple_window; | |
593 | bool ple_window_dirty; | |
843e4330 KH |
594 | |
595 | /* Support for PML */ | |
596 | #define PML_ENTITY_NUM 512 | |
597 | struct page *pml_pg; | |
a2fa3e9f GH |
598 | }; |
599 | ||
2fb92db1 AK |
600 | enum segment_cache_field { |
601 | SEG_FIELD_SEL = 0, | |
602 | SEG_FIELD_BASE = 1, | |
603 | SEG_FIELD_LIMIT = 2, | |
604 | SEG_FIELD_AR = 3, | |
605 | ||
606 | SEG_FIELD_NR = 4 | |
607 | }; | |
608 | ||
a2fa3e9f GH |
609 | static inline struct vcpu_vmx *to_vmx(struct kvm_vcpu *vcpu) |
610 | { | |
fb3f0f51 | 611 | return container_of(vcpu, struct vcpu_vmx, vcpu); |
a2fa3e9f GH |
612 | } |
613 | ||
efc64404 FW |
614 | static struct pi_desc *vcpu_to_pi_desc(struct kvm_vcpu *vcpu) |
615 | { | |
616 | return &(to_vmx(vcpu)->pi_desc); | |
617 | } | |
618 | ||
22bd0358 NHE |
619 | #define VMCS12_OFFSET(x) offsetof(struct vmcs12, x) |
620 | #define FIELD(number, name) [number] = VMCS12_OFFSET(name) | |
621 | #define FIELD64(number, name) [number] = VMCS12_OFFSET(name), \ | |
622 | [number##_HIGH] = VMCS12_OFFSET(name)+4 | |
623 | ||
4607c2d7 | 624 | |
fe2b201b | 625 | static unsigned long shadow_read_only_fields[] = { |
4607c2d7 AG |
626 | /* |
627 | * We do NOT shadow fields that are modified when L0 | |
628 | * traps and emulates any vmx instruction (e.g. VMPTRLD, | |
629 | * VMXON...) executed by L1. | |
630 | * For example, VM_INSTRUCTION_ERROR is read | |
631 | * by L1 if a vmx instruction fails (part of the error path). | |
632 | * Note the code assumes this logic. If for some reason | |
633 | * we start shadowing these fields then we need to | |
634 | * force a shadow sync when L0 emulates vmx instructions | |
635 | * (e.g. force a sync if VM_INSTRUCTION_ERROR is modified | |
636 | * by nested_vmx_failValid) | |
637 | */ | |
638 | VM_EXIT_REASON, | |
639 | VM_EXIT_INTR_INFO, | |
640 | VM_EXIT_INSTRUCTION_LEN, | |
641 | IDT_VECTORING_INFO_FIELD, | |
642 | IDT_VECTORING_ERROR_CODE, | |
643 | VM_EXIT_INTR_ERROR_CODE, | |
644 | EXIT_QUALIFICATION, | |
645 | GUEST_LINEAR_ADDRESS, | |
646 | GUEST_PHYSICAL_ADDRESS | |
647 | }; | |
fe2b201b | 648 | static int max_shadow_read_only_fields = |
4607c2d7 AG |
649 | ARRAY_SIZE(shadow_read_only_fields); |
650 | ||
fe2b201b | 651 | static unsigned long shadow_read_write_fields[] = { |
a7c0b07d | 652 | TPR_THRESHOLD, |
4607c2d7 AG |
653 | GUEST_RIP, |
654 | GUEST_RSP, | |
655 | GUEST_CR0, | |
656 | GUEST_CR3, | |
657 | GUEST_CR4, | |
658 | GUEST_INTERRUPTIBILITY_INFO, | |
659 | GUEST_RFLAGS, | |
660 | GUEST_CS_SELECTOR, | |
661 | GUEST_CS_AR_BYTES, | |
662 | GUEST_CS_LIMIT, | |
663 | GUEST_CS_BASE, | |
664 | GUEST_ES_BASE, | |
36be0b9d | 665 | GUEST_BNDCFGS, |
4607c2d7 AG |
666 | CR0_GUEST_HOST_MASK, |
667 | CR0_READ_SHADOW, | |
668 | CR4_READ_SHADOW, | |
669 | TSC_OFFSET, | |
670 | EXCEPTION_BITMAP, | |
671 | CPU_BASED_VM_EXEC_CONTROL, | |
672 | VM_ENTRY_EXCEPTION_ERROR_CODE, | |
673 | VM_ENTRY_INTR_INFO_FIELD, | |
674 | VM_ENTRY_INSTRUCTION_LEN, | |
675 | VM_ENTRY_EXCEPTION_ERROR_CODE, | |
676 | HOST_FS_BASE, | |
677 | HOST_GS_BASE, | |
678 | HOST_FS_SELECTOR, | |
679 | HOST_GS_SELECTOR | |
680 | }; | |
fe2b201b | 681 | static int max_shadow_read_write_fields = |
4607c2d7 AG |
682 | ARRAY_SIZE(shadow_read_write_fields); |
683 | ||
772e0318 | 684 | static const unsigned short vmcs_field_to_offset_table[] = { |
22bd0358 | 685 | FIELD(VIRTUAL_PROCESSOR_ID, virtual_processor_id), |
705699a1 | 686 | FIELD(POSTED_INTR_NV, posted_intr_nv), |
22bd0358 NHE |
687 | FIELD(GUEST_ES_SELECTOR, guest_es_selector), |
688 | FIELD(GUEST_CS_SELECTOR, guest_cs_selector), | |
689 | FIELD(GUEST_SS_SELECTOR, guest_ss_selector), | |
690 | FIELD(GUEST_DS_SELECTOR, guest_ds_selector), | |
691 | FIELD(GUEST_FS_SELECTOR, guest_fs_selector), | |
692 | FIELD(GUEST_GS_SELECTOR, guest_gs_selector), | |
693 | FIELD(GUEST_LDTR_SELECTOR, guest_ldtr_selector), | |
694 | FIELD(GUEST_TR_SELECTOR, guest_tr_selector), | |
608406e2 | 695 | FIELD(GUEST_INTR_STATUS, guest_intr_status), |
22bd0358 NHE |
696 | FIELD(HOST_ES_SELECTOR, host_es_selector), |
697 | FIELD(HOST_CS_SELECTOR, host_cs_selector), | |
698 | FIELD(HOST_SS_SELECTOR, host_ss_selector), | |
699 | FIELD(HOST_DS_SELECTOR, host_ds_selector), | |
700 | FIELD(HOST_FS_SELECTOR, host_fs_selector), | |
701 | FIELD(HOST_GS_SELECTOR, host_gs_selector), | |
702 | FIELD(HOST_TR_SELECTOR, host_tr_selector), | |
703 | FIELD64(IO_BITMAP_A, io_bitmap_a), | |
704 | FIELD64(IO_BITMAP_B, io_bitmap_b), | |
705 | FIELD64(MSR_BITMAP, msr_bitmap), | |
706 | FIELD64(VM_EXIT_MSR_STORE_ADDR, vm_exit_msr_store_addr), | |
707 | FIELD64(VM_EXIT_MSR_LOAD_ADDR, vm_exit_msr_load_addr), | |
708 | FIELD64(VM_ENTRY_MSR_LOAD_ADDR, vm_entry_msr_load_addr), | |
709 | FIELD64(TSC_OFFSET, tsc_offset), | |
710 | FIELD64(VIRTUAL_APIC_PAGE_ADDR, virtual_apic_page_addr), | |
711 | FIELD64(APIC_ACCESS_ADDR, apic_access_addr), | |
705699a1 | 712 | FIELD64(POSTED_INTR_DESC_ADDR, posted_intr_desc_addr), |
22bd0358 | 713 | FIELD64(EPT_POINTER, ept_pointer), |
608406e2 WV |
714 | FIELD64(EOI_EXIT_BITMAP0, eoi_exit_bitmap0), |
715 | FIELD64(EOI_EXIT_BITMAP1, eoi_exit_bitmap1), | |
716 | FIELD64(EOI_EXIT_BITMAP2, eoi_exit_bitmap2), | |
717 | FIELD64(EOI_EXIT_BITMAP3, eoi_exit_bitmap3), | |
81dc01f7 | 718 | FIELD64(XSS_EXIT_BITMAP, xss_exit_bitmap), |
22bd0358 NHE |
719 | FIELD64(GUEST_PHYSICAL_ADDRESS, guest_physical_address), |
720 | FIELD64(VMCS_LINK_POINTER, vmcs_link_pointer), | |
721 | FIELD64(GUEST_IA32_DEBUGCTL, guest_ia32_debugctl), | |
722 | FIELD64(GUEST_IA32_PAT, guest_ia32_pat), | |
723 | FIELD64(GUEST_IA32_EFER, guest_ia32_efer), | |
724 | FIELD64(GUEST_IA32_PERF_GLOBAL_CTRL, guest_ia32_perf_global_ctrl), | |
725 | FIELD64(GUEST_PDPTR0, guest_pdptr0), | |
726 | FIELD64(GUEST_PDPTR1, guest_pdptr1), | |
727 | FIELD64(GUEST_PDPTR2, guest_pdptr2), | |
728 | FIELD64(GUEST_PDPTR3, guest_pdptr3), | |
36be0b9d | 729 | FIELD64(GUEST_BNDCFGS, guest_bndcfgs), |
22bd0358 NHE |
730 | FIELD64(HOST_IA32_PAT, host_ia32_pat), |
731 | FIELD64(HOST_IA32_EFER, host_ia32_efer), | |
732 | FIELD64(HOST_IA32_PERF_GLOBAL_CTRL, host_ia32_perf_global_ctrl), | |
733 | FIELD(PIN_BASED_VM_EXEC_CONTROL, pin_based_vm_exec_control), | |
734 | FIELD(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control), | |
735 | FIELD(EXCEPTION_BITMAP, exception_bitmap), | |
736 | FIELD(PAGE_FAULT_ERROR_CODE_MASK, page_fault_error_code_mask), | |
737 | FIELD(PAGE_FAULT_ERROR_CODE_MATCH, page_fault_error_code_match), | |
738 | FIELD(CR3_TARGET_COUNT, cr3_target_count), | |
739 | FIELD(VM_EXIT_CONTROLS, vm_exit_controls), | |
740 | FIELD(VM_EXIT_MSR_STORE_COUNT, vm_exit_msr_store_count), | |
741 | FIELD(VM_EXIT_MSR_LOAD_COUNT, vm_exit_msr_load_count), | |
742 | FIELD(VM_ENTRY_CONTROLS, vm_entry_controls), | |
743 | FIELD(VM_ENTRY_MSR_LOAD_COUNT, vm_entry_msr_load_count), | |
744 | FIELD(VM_ENTRY_INTR_INFO_FIELD, vm_entry_intr_info_field), | |
745 | FIELD(VM_ENTRY_EXCEPTION_ERROR_CODE, vm_entry_exception_error_code), | |
746 | FIELD(VM_ENTRY_INSTRUCTION_LEN, vm_entry_instruction_len), | |
747 | FIELD(TPR_THRESHOLD, tpr_threshold), | |
748 | FIELD(SECONDARY_VM_EXEC_CONTROL, secondary_vm_exec_control), | |
749 | FIELD(VM_INSTRUCTION_ERROR, vm_instruction_error), | |
750 | FIELD(VM_EXIT_REASON, vm_exit_reason), | |
751 | FIELD(VM_EXIT_INTR_INFO, vm_exit_intr_info), | |
752 | FIELD(VM_EXIT_INTR_ERROR_CODE, vm_exit_intr_error_code), | |
753 | FIELD(IDT_VECTORING_INFO_FIELD, idt_vectoring_info_field), | |
754 | FIELD(IDT_VECTORING_ERROR_CODE, idt_vectoring_error_code), | |
755 | FIELD(VM_EXIT_INSTRUCTION_LEN, vm_exit_instruction_len), | |
756 | FIELD(VMX_INSTRUCTION_INFO, vmx_instruction_info), | |
757 | FIELD(GUEST_ES_LIMIT, guest_es_limit), | |
758 | FIELD(GUEST_CS_LIMIT, guest_cs_limit), | |
759 | FIELD(GUEST_SS_LIMIT, guest_ss_limit), | |
760 | FIELD(GUEST_DS_LIMIT, guest_ds_limit), | |
761 | FIELD(GUEST_FS_LIMIT, guest_fs_limit), | |
762 | FIELD(GUEST_GS_LIMIT, guest_gs_limit), | |
763 | FIELD(GUEST_LDTR_LIMIT, guest_ldtr_limit), | |
764 | FIELD(GUEST_TR_LIMIT, guest_tr_limit), | |
765 | FIELD(GUEST_GDTR_LIMIT, guest_gdtr_limit), | |
766 | FIELD(GUEST_IDTR_LIMIT, guest_idtr_limit), | |
767 | FIELD(GUEST_ES_AR_BYTES, guest_es_ar_bytes), | |
768 | FIELD(GUEST_CS_AR_BYTES, guest_cs_ar_bytes), | |
769 | FIELD(GUEST_SS_AR_BYTES, guest_ss_ar_bytes), | |
770 | FIELD(GUEST_DS_AR_BYTES, guest_ds_ar_bytes), | |
771 | FIELD(GUEST_FS_AR_BYTES, guest_fs_ar_bytes), | |
772 | FIELD(GUEST_GS_AR_BYTES, guest_gs_ar_bytes), | |
773 | FIELD(GUEST_LDTR_AR_BYTES, guest_ldtr_ar_bytes), | |
774 | FIELD(GUEST_TR_AR_BYTES, guest_tr_ar_bytes), | |
775 | FIELD(GUEST_INTERRUPTIBILITY_INFO, guest_interruptibility_info), | |
776 | FIELD(GUEST_ACTIVITY_STATE, guest_activity_state), | |
777 | FIELD(GUEST_SYSENTER_CS, guest_sysenter_cs), | |
778 | FIELD(HOST_IA32_SYSENTER_CS, host_ia32_sysenter_cs), | |
0238ea91 | 779 | FIELD(VMX_PREEMPTION_TIMER_VALUE, vmx_preemption_timer_value), |
22bd0358 NHE |
780 | FIELD(CR0_GUEST_HOST_MASK, cr0_guest_host_mask), |
781 | FIELD(CR4_GUEST_HOST_MASK, cr4_guest_host_mask), | |
782 | FIELD(CR0_READ_SHADOW, cr0_read_shadow), | |
783 | FIELD(CR4_READ_SHADOW, cr4_read_shadow), | |
784 | FIELD(CR3_TARGET_VALUE0, cr3_target_value0), | |
785 | FIELD(CR3_TARGET_VALUE1, cr3_target_value1), | |
786 | FIELD(CR3_TARGET_VALUE2, cr3_target_value2), | |
787 | FIELD(CR3_TARGET_VALUE3, cr3_target_value3), | |
788 | FIELD(EXIT_QUALIFICATION, exit_qualification), | |
789 | FIELD(GUEST_LINEAR_ADDRESS, guest_linear_address), | |
790 | FIELD(GUEST_CR0, guest_cr0), | |
791 | FIELD(GUEST_CR3, guest_cr3), | |
792 | FIELD(GUEST_CR4, guest_cr4), | |
793 | FIELD(GUEST_ES_BASE, guest_es_base), | |
794 | FIELD(GUEST_CS_BASE, guest_cs_base), | |
795 | FIELD(GUEST_SS_BASE, guest_ss_base), | |
796 | FIELD(GUEST_DS_BASE, guest_ds_base), | |
797 | FIELD(GUEST_FS_BASE, guest_fs_base), | |
798 | FIELD(GUEST_GS_BASE, guest_gs_base), | |
799 | FIELD(GUEST_LDTR_BASE, guest_ldtr_base), | |
800 | FIELD(GUEST_TR_BASE, guest_tr_base), | |
801 | FIELD(GUEST_GDTR_BASE, guest_gdtr_base), | |
802 | FIELD(GUEST_IDTR_BASE, guest_idtr_base), | |
803 | FIELD(GUEST_DR7, guest_dr7), | |
804 | FIELD(GUEST_RSP, guest_rsp), | |
805 | FIELD(GUEST_RIP, guest_rip), | |
806 | FIELD(GUEST_RFLAGS, guest_rflags), | |
807 | FIELD(GUEST_PENDING_DBG_EXCEPTIONS, guest_pending_dbg_exceptions), | |
808 | FIELD(GUEST_SYSENTER_ESP, guest_sysenter_esp), | |
809 | FIELD(GUEST_SYSENTER_EIP, guest_sysenter_eip), | |
810 | FIELD(HOST_CR0, host_cr0), | |
811 | FIELD(HOST_CR3, host_cr3), | |
812 | FIELD(HOST_CR4, host_cr4), | |
813 | FIELD(HOST_FS_BASE, host_fs_base), | |
814 | FIELD(HOST_GS_BASE, host_gs_base), | |
815 | FIELD(HOST_TR_BASE, host_tr_base), | |
816 | FIELD(HOST_GDTR_BASE, host_gdtr_base), | |
817 | FIELD(HOST_IDTR_BASE, host_idtr_base), | |
818 | FIELD(HOST_IA32_SYSENTER_ESP, host_ia32_sysenter_esp), | |
819 | FIELD(HOST_IA32_SYSENTER_EIP, host_ia32_sysenter_eip), | |
820 | FIELD(HOST_RSP, host_rsp), | |
821 | FIELD(HOST_RIP, host_rip), | |
822 | }; | |
22bd0358 NHE |
823 | |
824 | static inline short vmcs_field_to_offset(unsigned long field) | |
825 | { | |
a2ae9df7 PB |
826 | BUILD_BUG_ON(ARRAY_SIZE(vmcs_field_to_offset_table) > SHRT_MAX); |
827 | ||
828 | if (field >= ARRAY_SIZE(vmcs_field_to_offset_table) || | |
829 | vmcs_field_to_offset_table[field] == 0) | |
830 | return -ENOENT; | |
831 | ||
22bd0358 NHE |
832 | return vmcs_field_to_offset_table[field]; |
833 | } | |
834 | ||
a9d30f33 NHE |
835 | static inline struct vmcs12 *get_vmcs12(struct kvm_vcpu *vcpu) |
836 | { | |
837 | return to_vmx(vcpu)->nested.current_vmcs12; | |
838 | } | |
839 | ||
840 | static struct page *nested_get_page(struct kvm_vcpu *vcpu, gpa_t addr) | |
841 | { | |
54bf36aa | 842 | struct page *page = kvm_vcpu_gfn_to_page(vcpu, addr >> PAGE_SHIFT); |
32cad84f | 843 | if (is_error_page(page)) |
a9d30f33 | 844 | return NULL; |
32cad84f | 845 | |
a9d30f33 NHE |
846 | return page; |
847 | } | |
848 | ||
849 | static void nested_release_page(struct page *page) | |
850 | { | |
851 | kvm_release_page_dirty(page); | |
852 | } | |
853 | ||
854 | static void nested_release_page_clean(struct page *page) | |
855 | { | |
856 | kvm_release_page_clean(page); | |
857 | } | |
858 | ||
bfd0a56b | 859 | static unsigned long nested_ept_get_cr3(struct kvm_vcpu *vcpu); |
4e1096d2 | 860 | static u64 construct_eptp(unsigned long root_hpa); |
4610c9cc DX |
861 | static void kvm_cpu_vmxon(u64 addr); |
862 | static void kvm_cpu_vmxoff(void); | |
93c4adc7 | 863 | static bool vmx_mpx_supported(void); |
f53cd63c | 864 | static bool vmx_xsaves_supported(void); |
d50ab6c1 | 865 | static int vmx_cpu_uses_apicv(struct kvm_vcpu *vcpu); |
776e58ea | 866 | static int vmx_set_tss_addr(struct kvm *kvm, unsigned int addr); |
b246dd5d OW |
867 | static void vmx_set_segment(struct kvm_vcpu *vcpu, |
868 | struct kvm_segment *var, int seg); | |
869 | static void vmx_get_segment(struct kvm_vcpu *vcpu, | |
870 | struct kvm_segment *var, int seg); | |
d99e4152 GN |
871 | static bool guest_state_valid(struct kvm_vcpu *vcpu); |
872 | static u32 vmx_segment_access_rights(struct kvm_segment *var); | |
a20ed54d | 873 | static void vmx_sync_pir_to_irr_dummy(struct kvm_vcpu *vcpu); |
c3114420 | 874 | static void copy_vmcs12_to_shadow(struct vcpu_vmx *vmx); |
16f5b903 | 875 | static void copy_shadow_to_vmcs12(struct vcpu_vmx *vmx); |
a255d479 | 876 | static int alloc_identity_pagetable(struct kvm *kvm); |
75880a01 | 877 | |
6aa8b732 AK |
878 | static DEFINE_PER_CPU(struct vmcs *, vmxarea); |
879 | static DEFINE_PER_CPU(struct vmcs *, current_vmcs); | |
d462b819 NHE |
880 | /* |
881 | * We maintain a per-CPU linked-list of VMCS loaded on that CPU. This is needed | |
882 | * when a CPU is brought down, and we need to VMCLEAR all VMCSs loaded on it. | |
883 | */ | |
884 | static DEFINE_PER_CPU(struct list_head, loaded_vmcss_on_cpu); | |
3444d7da | 885 | static DEFINE_PER_CPU(struct desc_ptr, host_gdt); |
6aa8b732 | 886 | |
bf9f6ac8 FW |
887 | /* |
888 | * We maintian a per-CPU linked-list of vCPU, so in wakeup_handler() we | |
889 | * can find which vCPU should be waken up. | |
890 | */ | |
891 | static DEFINE_PER_CPU(struct list_head, blocked_vcpu_on_cpu); | |
892 | static DEFINE_PER_CPU(spinlock_t, blocked_vcpu_on_cpu_lock); | |
893 | ||
3e7c73e9 AK |
894 | static unsigned long *vmx_io_bitmap_a; |
895 | static unsigned long *vmx_io_bitmap_b; | |
5897297b AK |
896 | static unsigned long *vmx_msr_bitmap_legacy; |
897 | static unsigned long *vmx_msr_bitmap_longmode; | |
8d14695f YZ |
898 | static unsigned long *vmx_msr_bitmap_legacy_x2apic; |
899 | static unsigned long *vmx_msr_bitmap_longmode_x2apic; | |
3af18d9c | 900 | static unsigned long *vmx_msr_bitmap_nested; |
4607c2d7 AG |
901 | static unsigned long *vmx_vmread_bitmap; |
902 | static unsigned long *vmx_vmwrite_bitmap; | |
fdef3ad1 | 903 | |
110312c8 | 904 | static bool cpu_has_load_ia32_efer; |
8bf00a52 | 905 | static bool cpu_has_load_perf_global_ctrl; |
110312c8 | 906 | |
2384d2b3 SY |
907 | static DECLARE_BITMAP(vmx_vpid_bitmap, VMX_NR_VPIDS); |
908 | static DEFINE_SPINLOCK(vmx_vpid_lock); | |
909 | ||
1c3d14fe | 910 | static struct vmcs_config { |
6aa8b732 AK |
911 | int size; |
912 | int order; | |
913 | u32 revision_id; | |
1c3d14fe YS |
914 | u32 pin_based_exec_ctrl; |
915 | u32 cpu_based_exec_ctrl; | |
f78e0e2e | 916 | u32 cpu_based_2nd_exec_ctrl; |
1c3d14fe YS |
917 | u32 vmexit_ctrl; |
918 | u32 vmentry_ctrl; | |
919 | } vmcs_config; | |
6aa8b732 | 920 | |
efff9e53 | 921 | static struct vmx_capability { |
d56f546d SY |
922 | u32 ept; |
923 | u32 vpid; | |
924 | } vmx_capability; | |
925 | ||
6aa8b732 AK |
926 | #define VMX_SEGMENT_FIELD(seg) \ |
927 | [VCPU_SREG_##seg] = { \ | |
928 | .selector = GUEST_##seg##_SELECTOR, \ | |
929 | .base = GUEST_##seg##_BASE, \ | |
930 | .limit = GUEST_##seg##_LIMIT, \ | |
931 | .ar_bytes = GUEST_##seg##_AR_BYTES, \ | |
932 | } | |
933 | ||
772e0318 | 934 | static const struct kvm_vmx_segment_field { |
6aa8b732 AK |
935 | unsigned selector; |
936 | unsigned base; | |
937 | unsigned limit; | |
938 | unsigned ar_bytes; | |
939 | } kvm_vmx_segment_fields[] = { | |
940 | VMX_SEGMENT_FIELD(CS), | |
941 | VMX_SEGMENT_FIELD(DS), | |
942 | VMX_SEGMENT_FIELD(ES), | |
943 | VMX_SEGMENT_FIELD(FS), | |
944 | VMX_SEGMENT_FIELD(GS), | |
945 | VMX_SEGMENT_FIELD(SS), | |
946 | VMX_SEGMENT_FIELD(TR), | |
947 | VMX_SEGMENT_FIELD(LDTR), | |
948 | }; | |
949 | ||
26bb0981 AK |
950 | static u64 host_efer; |
951 | ||
6de4f3ad AK |
952 | static void ept_save_pdptrs(struct kvm_vcpu *vcpu); |
953 | ||
4d56c8a7 | 954 | /* |
8c06585d | 955 | * Keep MSR_STAR at the end, as setup_msrs() will try to optimize it |
4d56c8a7 AK |
956 | * away by decrementing the array size. |
957 | */ | |
6aa8b732 | 958 | static const u32 vmx_msr_index[] = { |
05b3e0c2 | 959 | #ifdef CONFIG_X86_64 |
44ea2b17 | 960 | MSR_SYSCALL_MASK, MSR_LSTAR, MSR_CSTAR, |
6aa8b732 | 961 | #endif |
8c06585d | 962 | MSR_EFER, MSR_TSC_AUX, MSR_STAR, |
6aa8b732 | 963 | }; |
6aa8b732 | 964 | |
31299944 | 965 | static inline bool is_page_fault(u32 intr_info) |
6aa8b732 AK |
966 | { |
967 | return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK | | |
968 | INTR_INFO_VALID_MASK)) == | |
8ab2d2e2 | 969 | (INTR_TYPE_HARD_EXCEPTION | PF_VECTOR | INTR_INFO_VALID_MASK); |
6aa8b732 AK |
970 | } |
971 | ||
31299944 | 972 | static inline bool is_no_device(u32 intr_info) |
2ab455cc AL |
973 | { |
974 | return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK | | |
975 | INTR_INFO_VALID_MASK)) == | |
8ab2d2e2 | 976 | (INTR_TYPE_HARD_EXCEPTION | NM_VECTOR | INTR_INFO_VALID_MASK); |
2ab455cc AL |
977 | } |
978 | ||
31299944 | 979 | static inline bool is_invalid_opcode(u32 intr_info) |
7aa81cc0 AL |
980 | { |
981 | return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK | | |
982 | INTR_INFO_VALID_MASK)) == | |
8ab2d2e2 | 983 | (INTR_TYPE_HARD_EXCEPTION | UD_VECTOR | INTR_INFO_VALID_MASK); |
7aa81cc0 AL |
984 | } |
985 | ||
31299944 | 986 | static inline bool is_external_interrupt(u32 intr_info) |
6aa8b732 AK |
987 | { |
988 | return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VALID_MASK)) | |
989 | == (INTR_TYPE_EXT_INTR | INTR_INFO_VALID_MASK); | |
990 | } | |
991 | ||
31299944 | 992 | static inline bool is_machine_check(u32 intr_info) |
a0861c02 AK |
993 | { |
994 | return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK | | |
995 | INTR_INFO_VALID_MASK)) == | |
996 | (INTR_TYPE_HARD_EXCEPTION | MC_VECTOR | INTR_INFO_VALID_MASK); | |
997 | } | |
998 | ||
31299944 | 999 | static inline bool cpu_has_vmx_msr_bitmap(void) |
25c5f225 | 1000 | { |
04547156 | 1001 | return vmcs_config.cpu_based_exec_ctrl & CPU_BASED_USE_MSR_BITMAPS; |
25c5f225 SY |
1002 | } |
1003 | ||
31299944 | 1004 | static inline bool cpu_has_vmx_tpr_shadow(void) |
6e5d865c | 1005 | { |
04547156 | 1006 | return vmcs_config.cpu_based_exec_ctrl & CPU_BASED_TPR_SHADOW; |
6e5d865c YS |
1007 | } |
1008 | ||
35754c98 | 1009 | static inline bool cpu_need_tpr_shadow(struct kvm_vcpu *vcpu) |
6e5d865c | 1010 | { |
35754c98 | 1011 | return cpu_has_vmx_tpr_shadow() && lapic_in_kernel(vcpu); |
6e5d865c YS |
1012 | } |
1013 | ||
31299944 | 1014 | static inline bool cpu_has_secondary_exec_ctrls(void) |
f78e0e2e | 1015 | { |
04547156 SY |
1016 | return vmcs_config.cpu_based_exec_ctrl & |
1017 | CPU_BASED_ACTIVATE_SECONDARY_CONTROLS; | |
f78e0e2e SY |
1018 | } |
1019 | ||
774ead3a | 1020 | static inline bool cpu_has_vmx_virtualize_apic_accesses(void) |
f78e0e2e | 1021 | { |
04547156 SY |
1022 | return vmcs_config.cpu_based_2nd_exec_ctrl & |
1023 | SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES; | |
1024 | } | |
1025 | ||
8d14695f YZ |
1026 | static inline bool cpu_has_vmx_virtualize_x2apic_mode(void) |
1027 | { | |
1028 | return vmcs_config.cpu_based_2nd_exec_ctrl & | |
1029 | SECONDARY_EXEC_VIRTUALIZE_X2APIC_MODE; | |
1030 | } | |
1031 | ||
83d4c286 YZ |
1032 | static inline bool cpu_has_vmx_apic_register_virt(void) |
1033 | { | |
1034 | return vmcs_config.cpu_based_2nd_exec_ctrl & | |
1035 | SECONDARY_EXEC_APIC_REGISTER_VIRT; | |
1036 | } | |
1037 | ||
c7c9c56c YZ |
1038 | static inline bool cpu_has_vmx_virtual_intr_delivery(void) |
1039 | { | |
1040 | return vmcs_config.cpu_based_2nd_exec_ctrl & | |
1041 | SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY; | |
1042 | } | |
1043 | ||
01e439be YZ |
1044 | static inline bool cpu_has_vmx_posted_intr(void) |
1045 | { | |
d6a858d1 PB |
1046 | return IS_ENABLED(CONFIG_X86_LOCAL_APIC) && |
1047 | vmcs_config.pin_based_exec_ctrl & PIN_BASED_POSTED_INTR; | |
01e439be YZ |
1048 | } |
1049 | ||
1050 | static inline bool cpu_has_vmx_apicv(void) | |
1051 | { | |
1052 | return cpu_has_vmx_apic_register_virt() && | |
1053 | cpu_has_vmx_virtual_intr_delivery() && | |
1054 | cpu_has_vmx_posted_intr(); | |
1055 | } | |
1056 | ||
04547156 SY |
1057 | static inline bool cpu_has_vmx_flexpriority(void) |
1058 | { | |
1059 | return cpu_has_vmx_tpr_shadow() && | |
1060 | cpu_has_vmx_virtualize_apic_accesses(); | |
f78e0e2e SY |
1061 | } |
1062 | ||
e799794e MT |
1063 | static inline bool cpu_has_vmx_ept_execute_only(void) |
1064 | { | |
31299944 | 1065 | return vmx_capability.ept & VMX_EPT_EXECUTE_ONLY_BIT; |
e799794e MT |
1066 | } |
1067 | ||
e799794e MT |
1068 | static inline bool cpu_has_vmx_ept_2m_page(void) |
1069 | { | |
31299944 | 1070 | return vmx_capability.ept & VMX_EPT_2MB_PAGE_BIT; |
e799794e MT |
1071 | } |
1072 | ||
878403b7 SY |
1073 | static inline bool cpu_has_vmx_ept_1g_page(void) |
1074 | { | |
31299944 | 1075 | return vmx_capability.ept & VMX_EPT_1GB_PAGE_BIT; |
878403b7 SY |
1076 | } |
1077 | ||
4bc9b982 SY |
1078 | static inline bool cpu_has_vmx_ept_4levels(void) |
1079 | { | |
1080 | return vmx_capability.ept & VMX_EPT_PAGE_WALK_4_BIT; | |
1081 | } | |
1082 | ||
83c3a331 XH |
1083 | static inline bool cpu_has_vmx_ept_ad_bits(void) |
1084 | { | |
1085 | return vmx_capability.ept & VMX_EPT_AD_BIT; | |
1086 | } | |
1087 | ||
31299944 | 1088 | static inline bool cpu_has_vmx_invept_context(void) |
d56f546d | 1089 | { |
31299944 | 1090 | return vmx_capability.ept & VMX_EPT_EXTENT_CONTEXT_BIT; |
d56f546d SY |
1091 | } |
1092 | ||
31299944 | 1093 | static inline bool cpu_has_vmx_invept_global(void) |
d56f546d | 1094 | { |
31299944 | 1095 | return vmx_capability.ept & VMX_EPT_EXTENT_GLOBAL_BIT; |
d56f546d SY |
1096 | } |
1097 | ||
518c8aee GJ |
1098 | static inline bool cpu_has_vmx_invvpid_single(void) |
1099 | { | |
1100 | return vmx_capability.vpid & VMX_VPID_EXTENT_SINGLE_CONTEXT_BIT; | |
1101 | } | |
1102 | ||
b9d762fa GJ |
1103 | static inline bool cpu_has_vmx_invvpid_global(void) |
1104 | { | |
1105 | return vmx_capability.vpid & VMX_VPID_EXTENT_GLOBAL_CONTEXT_BIT; | |
1106 | } | |
1107 | ||
31299944 | 1108 | static inline bool cpu_has_vmx_ept(void) |
d56f546d | 1109 | { |
04547156 SY |
1110 | return vmcs_config.cpu_based_2nd_exec_ctrl & |
1111 | SECONDARY_EXEC_ENABLE_EPT; | |
d56f546d SY |
1112 | } |
1113 | ||
31299944 | 1114 | static inline bool cpu_has_vmx_unrestricted_guest(void) |
3a624e29 NK |
1115 | { |
1116 | return vmcs_config.cpu_based_2nd_exec_ctrl & | |
1117 | SECONDARY_EXEC_UNRESTRICTED_GUEST; | |
1118 | } | |
1119 | ||
31299944 | 1120 | static inline bool cpu_has_vmx_ple(void) |
4b8d54f9 ZE |
1121 | { |
1122 | return vmcs_config.cpu_based_2nd_exec_ctrl & | |
1123 | SECONDARY_EXEC_PAUSE_LOOP_EXITING; | |
1124 | } | |
1125 | ||
35754c98 | 1126 | static inline bool cpu_need_virtualize_apic_accesses(struct kvm_vcpu *vcpu) |
f78e0e2e | 1127 | { |
35754c98 | 1128 | return flexpriority_enabled && lapic_in_kernel(vcpu); |
f78e0e2e SY |
1129 | } |
1130 | ||
31299944 | 1131 | static inline bool cpu_has_vmx_vpid(void) |
2384d2b3 | 1132 | { |
04547156 SY |
1133 | return vmcs_config.cpu_based_2nd_exec_ctrl & |
1134 | SECONDARY_EXEC_ENABLE_VPID; | |
2384d2b3 SY |
1135 | } |
1136 | ||
31299944 | 1137 | static inline bool cpu_has_vmx_rdtscp(void) |
4e47c7a6 SY |
1138 | { |
1139 | return vmcs_config.cpu_based_2nd_exec_ctrl & | |
1140 | SECONDARY_EXEC_RDTSCP; | |
1141 | } | |
1142 | ||
ad756a16 MJ |
1143 | static inline bool cpu_has_vmx_invpcid(void) |
1144 | { | |
1145 | return vmcs_config.cpu_based_2nd_exec_ctrl & | |
1146 | SECONDARY_EXEC_ENABLE_INVPCID; | |
1147 | } | |
1148 | ||
31299944 | 1149 | static inline bool cpu_has_virtual_nmis(void) |
f08864b4 SY |
1150 | { |
1151 | return vmcs_config.pin_based_exec_ctrl & PIN_BASED_VIRTUAL_NMIS; | |
1152 | } | |
1153 | ||
f5f48ee1 SY |
1154 | static inline bool cpu_has_vmx_wbinvd_exit(void) |
1155 | { | |
1156 | return vmcs_config.cpu_based_2nd_exec_ctrl & | |
1157 | SECONDARY_EXEC_WBINVD_EXITING; | |
1158 | } | |
1159 | ||
abc4fc58 AG |
1160 | static inline bool cpu_has_vmx_shadow_vmcs(void) |
1161 | { | |
1162 | u64 vmx_msr; | |
1163 | rdmsrl(MSR_IA32_VMX_MISC, vmx_msr); | |
1164 | /* check if the cpu supports writing r/o exit information fields */ | |
1165 | if (!(vmx_msr & MSR_IA32_VMX_MISC_VMWRITE_SHADOW_RO_FIELDS)) | |
1166 | return false; | |
1167 | ||
1168 | return vmcs_config.cpu_based_2nd_exec_ctrl & | |
1169 | SECONDARY_EXEC_SHADOW_VMCS; | |
1170 | } | |
1171 | ||
843e4330 KH |
1172 | static inline bool cpu_has_vmx_pml(void) |
1173 | { | |
1174 | return vmcs_config.cpu_based_2nd_exec_ctrl & SECONDARY_EXEC_ENABLE_PML; | |
1175 | } | |
1176 | ||
64903d61 HZ |
1177 | static inline bool cpu_has_vmx_tsc_scaling(void) |
1178 | { | |
1179 | return vmcs_config.cpu_based_2nd_exec_ctrl & | |
1180 | SECONDARY_EXEC_TSC_SCALING; | |
1181 | } | |
1182 | ||
04547156 SY |
1183 | static inline bool report_flexpriority(void) |
1184 | { | |
1185 | return flexpriority_enabled; | |
1186 | } | |
1187 | ||
fe3ef05c NHE |
1188 | static inline bool nested_cpu_has(struct vmcs12 *vmcs12, u32 bit) |
1189 | { | |
1190 | return vmcs12->cpu_based_vm_exec_control & bit; | |
1191 | } | |
1192 | ||
1193 | static inline bool nested_cpu_has2(struct vmcs12 *vmcs12, u32 bit) | |
1194 | { | |
1195 | return (vmcs12->cpu_based_vm_exec_control & | |
1196 | CPU_BASED_ACTIVATE_SECONDARY_CONTROLS) && | |
1197 | (vmcs12->secondary_vm_exec_control & bit); | |
1198 | } | |
1199 | ||
f5c4368f | 1200 | static inline bool nested_cpu_has_virtual_nmis(struct vmcs12 *vmcs12) |
644d711a NHE |
1201 | { |
1202 | return vmcs12->pin_based_vm_exec_control & PIN_BASED_VIRTUAL_NMIS; | |
1203 | } | |
1204 | ||
f4124500 JK |
1205 | static inline bool nested_cpu_has_preemption_timer(struct vmcs12 *vmcs12) |
1206 | { | |
1207 | return vmcs12->pin_based_vm_exec_control & | |
1208 | PIN_BASED_VMX_PREEMPTION_TIMER; | |
1209 | } | |
1210 | ||
155a97a3 NHE |
1211 | static inline int nested_cpu_has_ept(struct vmcs12 *vmcs12) |
1212 | { | |
1213 | return nested_cpu_has2(vmcs12, SECONDARY_EXEC_ENABLE_EPT); | |
1214 | } | |
1215 | ||
81dc01f7 WL |
1216 | static inline bool nested_cpu_has_xsaves(struct vmcs12 *vmcs12) |
1217 | { | |
1218 | return nested_cpu_has2(vmcs12, SECONDARY_EXEC_XSAVES) && | |
1219 | vmx_xsaves_supported(); | |
1220 | } | |
1221 | ||
f2b93280 WV |
1222 | static inline bool nested_cpu_has_virt_x2apic_mode(struct vmcs12 *vmcs12) |
1223 | { | |
1224 | return nested_cpu_has2(vmcs12, SECONDARY_EXEC_VIRTUALIZE_X2APIC_MODE); | |
1225 | } | |
1226 | ||
5c614b35 WL |
1227 | static inline bool nested_cpu_has_vpid(struct vmcs12 *vmcs12) |
1228 | { | |
1229 | return nested_cpu_has2(vmcs12, SECONDARY_EXEC_ENABLE_VPID); | |
1230 | } | |
1231 | ||
82f0dd4b WV |
1232 | static inline bool nested_cpu_has_apic_reg_virt(struct vmcs12 *vmcs12) |
1233 | { | |
1234 | return nested_cpu_has2(vmcs12, SECONDARY_EXEC_APIC_REGISTER_VIRT); | |
1235 | } | |
1236 | ||
608406e2 WV |
1237 | static inline bool nested_cpu_has_vid(struct vmcs12 *vmcs12) |
1238 | { | |
1239 | return nested_cpu_has2(vmcs12, SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY); | |
1240 | } | |
1241 | ||
705699a1 WV |
1242 | static inline bool nested_cpu_has_posted_intr(struct vmcs12 *vmcs12) |
1243 | { | |
1244 | return vmcs12->pin_based_vm_exec_control & PIN_BASED_POSTED_INTR; | |
1245 | } | |
1246 | ||
644d711a NHE |
1247 | static inline bool is_exception(u32 intr_info) |
1248 | { | |
1249 | return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VALID_MASK)) | |
1250 | == (INTR_TYPE_HARD_EXCEPTION | INTR_INFO_VALID_MASK); | |
1251 | } | |
1252 | ||
533558bc JK |
1253 | static void nested_vmx_vmexit(struct kvm_vcpu *vcpu, u32 exit_reason, |
1254 | u32 exit_intr_info, | |
1255 | unsigned long exit_qualification); | |
7c177938 NHE |
1256 | static void nested_vmx_entry_failure(struct kvm_vcpu *vcpu, |
1257 | struct vmcs12 *vmcs12, | |
1258 | u32 reason, unsigned long qualification); | |
1259 | ||
8b9cf98c | 1260 | static int __find_msr_index(struct vcpu_vmx *vmx, u32 msr) |
7725f0ba AK |
1261 | { |
1262 | int i; | |
1263 | ||
a2fa3e9f | 1264 | for (i = 0; i < vmx->nmsrs; ++i) |
26bb0981 | 1265 | if (vmx_msr_index[vmx->guest_msrs[i].index] == msr) |
a75beee6 ED |
1266 | return i; |
1267 | return -1; | |
1268 | } | |
1269 | ||
2384d2b3 SY |
1270 | static inline void __invvpid(int ext, u16 vpid, gva_t gva) |
1271 | { | |
1272 | struct { | |
1273 | u64 vpid : 16; | |
1274 | u64 rsvd : 48; | |
1275 | u64 gva; | |
1276 | } operand = { vpid, 0, gva }; | |
1277 | ||
4ecac3fd | 1278 | asm volatile (__ex(ASM_VMX_INVVPID) |
2384d2b3 SY |
1279 | /* CF==1 or ZF==1 --> rc = -1 */ |
1280 | "; ja 1f ; ud2 ; 1:" | |
1281 | : : "a"(&operand), "c"(ext) : "cc", "memory"); | |
1282 | } | |
1283 | ||
1439442c SY |
1284 | static inline void __invept(int ext, u64 eptp, gpa_t gpa) |
1285 | { | |
1286 | struct { | |
1287 | u64 eptp, gpa; | |
1288 | } operand = {eptp, gpa}; | |
1289 | ||
4ecac3fd | 1290 | asm volatile (__ex(ASM_VMX_INVEPT) |
1439442c SY |
1291 | /* CF==1 or ZF==1 --> rc = -1 */ |
1292 | "; ja 1f ; ud2 ; 1:\n" | |
1293 | : : "a" (&operand), "c" (ext) : "cc", "memory"); | |
1294 | } | |
1295 | ||
26bb0981 | 1296 | static struct shared_msr_entry *find_msr_entry(struct vcpu_vmx *vmx, u32 msr) |
a75beee6 ED |
1297 | { |
1298 | int i; | |
1299 | ||
8b9cf98c | 1300 | i = __find_msr_index(vmx, msr); |
a75beee6 | 1301 | if (i >= 0) |
a2fa3e9f | 1302 | return &vmx->guest_msrs[i]; |
8b6d44c7 | 1303 | return NULL; |
7725f0ba AK |
1304 | } |
1305 | ||
6aa8b732 AK |
1306 | static void vmcs_clear(struct vmcs *vmcs) |
1307 | { | |
1308 | u64 phys_addr = __pa(vmcs); | |
1309 | u8 error; | |
1310 | ||
4ecac3fd | 1311 | asm volatile (__ex(ASM_VMX_VMCLEAR_RAX) "; setna %0" |
16d8f72f | 1312 | : "=qm"(error) : "a"(&phys_addr), "m"(phys_addr) |
6aa8b732 AK |
1313 | : "cc", "memory"); |
1314 | if (error) | |
1315 | printk(KERN_ERR "kvm: vmclear fail: %p/%llx\n", | |
1316 | vmcs, phys_addr); | |
1317 | } | |
1318 | ||
d462b819 NHE |
1319 | static inline void loaded_vmcs_init(struct loaded_vmcs *loaded_vmcs) |
1320 | { | |
1321 | vmcs_clear(loaded_vmcs->vmcs); | |
1322 | loaded_vmcs->cpu = -1; | |
1323 | loaded_vmcs->launched = 0; | |
1324 | } | |
1325 | ||
7725b894 DX |
1326 | static void vmcs_load(struct vmcs *vmcs) |
1327 | { | |
1328 | u64 phys_addr = __pa(vmcs); | |
1329 | u8 error; | |
1330 | ||
1331 | asm volatile (__ex(ASM_VMX_VMPTRLD_RAX) "; setna %0" | |
16d8f72f | 1332 | : "=qm"(error) : "a"(&phys_addr), "m"(phys_addr) |
7725b894 DX |
1333 | : "cc", "memory"); |
1334 | if (error) | |
2844d849 | 1335 | printk(KERN_ERR "kvm: vmptrld %p/%llx failed\n", |
7725b894 DX |
1336 | vmcs, phys_addr); |
1337 | } | |
1338 | ||
2965faa5 | 1339 | #ifdef CONFIG_KEXEC_CORE |
8f536b76 ZY |
1340 | /* |
1341 | * This bitmap is used to indicate whether the vmclear | |
1342 | * operation is enabled on all cpus. All disabled by | |
1343 | * default. | |
1344 | */ | |
1345 | static cpumask_t crash_vmclear_enabled_bitmap = CPU_MASK_NONE; | |
1346 | ||
1347 | static inline void crash_enable_local_vmclear(int cpu) | |
1348 | { | |
1349 | cpumask_set_cpu(cpu, &crash_vmclear_enabled_bitmap); | |
1350 | } | |
1351 | ||
1352 | static inline void crash_disable_local_vmclear(int cpu) | |
1353 | { | |
1354 | cpumask_clear_cpu(cpu, &crash_vmclear_enabled_bitmap); | |
1355 | } | |
1356 | ||
1357 | static inline int crash_local_vmclear_enabled(int cpu) | |
1358 | { | |
1359 | return cpumask_test_cpu(cpu, &crash_vmclear_enabled_bitmap); | |
1360 | } | |
1361 | ||
1362 | static void crash_vmclear_local_loaded_vmcss(void) | |
1363 | { | |
1364 | int cpu = raw_smp_processor_id(); | |
1365 | struct loaded_vmcs *v; | |
1366 | ||
1367 | if (!crash_local_vmclear_enabled(cpu)) | |
1368 | return; | |
1369 | ||
1370 | list_for_each_entry(v, &per_cpu(loaded_vmcss_on_cpu, cpu), | |
1371 | loaded_vmcss_on_cpu_link) | |
1372 | vmcs_clear(v->vmcs); | |
1373 | } | |
1374 | #else | |
1375 | static inline void crash_enable_local_vmclear(int cpu) { } | |
1376 | static inline void crash_disable_local_vmclear(int cpu) { } | |
2965faa5 | 1377 | #endif /* CONFIG_KEXEC_CORE */ |
8f536b76 | 1378 | |
d462b819 | 1379 | static void __loaded_vmcs_clear(void *arg) |
6aa8b732 | 1380 | { |
d462b819 | 1381 | struct loaded_vmcs *loaded_vmcs = arg; |
d3b2c338 | 1382 | int cpu = raw_smp_processor_id(); |
6aa8b732 | 1383 | |
d462b819 NHE |
1384 | if (loaded_vmcs->cpu != cpu) |
1385 | return; /* vcpu migration can race with cpu offline */ | |
1386 | if (per_cpu(current_vmcs, cpu) == loaded_vmcs->vmcs) | |
6aa8b732 | 1387 | per_cpu(current_vmcs, cpu) = NULL; |
8f536b76 | 1388 | crash_disable_local_vmclear(cpu); |
d462b819 | 1389 | list_del(&loaded_vmcs->loaded_vmcss_on_cpu_link); |
5a560f8b XG |
1390 | |
1391 | /* | |
1392 | * we should ensure updating loaded_vmcs->loaded_vmcss_on_cpu_link | |
1393 | * is before setting loaded_vmcs->vcpu to -1 which is done in | |
1394 | * loaded_vmcs_init. Otherwise, other cpu can see vcpu = -1 fist | |
1395 | * then adds the vmcs into percpu list before it is deleted. | |
1396 | */ | |
1397 | smp_wmb(); | |
1398 | ||
d462b819 | 1399 | loaded_vmcs_init(loaded_vmcs); |
8f536b76 | 1400 | crash_enable_local_vmclear(cpu); |
6aa8b732 AK |
1401 | } |
1402 | ||
d462b819 | 1403 | static void loaded_vmcs_clear(struct loaded_vmcs *loaded_vmcs) |
8d0be2b3 | 1404 | { |
e6c7d321 XG |
1405 | int cpu = loaded_vmcs->cpu; |
1406 | ||
1407 | if (cpu != -1) | |
1408 | smp_call_function_single(cpu, | |
1409 | __loaded_vmcs_clear, loaded_vmcs, 1); | |
8d0be2b3 AK |
1410 | } |
1411 | ||
dd5f5341 | 1412 | static inline void vpid_sync_vcpu_single(int vpid) |
2384d2b3 | 1413 | { |
dd5f5341 | 1414 | if (vpid == 0) |
2384d2b3 SY |
1415 | return; |
1416 | ||
518c8aee | 1417 | if (cpu_has_vmx_invvpid_single()) |
dd5f5341 | 1418 | __invvpid(VMX_VPID_EXTENT_SINGLE_CONTEXT, vpid, 0); |
2384d2b3 SY |
1419 | } |
1420 | ||
b9d762fa GJ |
1421 | static inline void vpid_sync_vcpu_global(void) |
1422 | { | |
1423 | if (cpu_has_vmx_invvpid_global()) | |
1424 | __invvpid(VMX_VPID_EXTENT_ALL_CONTEXT, 0, 0); | |
1425 | } | |
1426 | ||
dd5f5341 | 1427 | static inline void vpid_sync_context(int vpid) |
b9d762fa GJ |
1428 | { |
1429 | if (cpu_has_vmx_invvpid_single()) | |
dd5f5341 | 1430 | vpid_sync_vcpu_single(vpid); |
b9d762fa GJ |
1431 | else |
1432 | vpid_sync_vcpu_global(); | |
1433 | } | |
1434 | ||
1439442c SY |
1435 | static inline void ept_sync_global(void) |
1436 | { | |
1437 | if (cpu_has_vmx_invept_global()) | |
1438 | __invept(VMX_EPT_EXTENT_GLOBAL, 0, 0); | |
1439 | } | |
1440 | ||
1441 | static inline void ept_sync_context(u64 eptp) | |
1442 | { | |
089d034e | 1443 | if (enable_ept) { |
1439442c SY |
1444 | if (cpu_has_vmx_invept_context()) |
1445 | __invept(VMX_EPT_EXTENT_CONTEXT, eptp, 0); | |
1446 | else | |
1447 | ept_sync_global(); | |
1448 | } | |
1449 | } | |
1450 | ||
96304217 | 1451 | static __always_inline unsigned long vmcs_readl(unsigned long field) |
6aa8b732 | 1452 | { |
5e520e62 | 1453 | unsigned long value; |
6aa8b732 | 1454 | |
5e520e62 AK |
1455 | asm volatile (__ex_clear(ASM_VMX_VMREAD_RDX_RAX, "%0") |
1456 | : "=a"(value) : "d"(field) : "cc"); | |
6aa8b732 AK |
1457 | return value; |
1458 | } | |
1459 | ||
96304217 | 1460 | static __always_inline u16 vmcs_read16(unsigned long field) |
6aa8b732 AK |
1461 | { |
1462 | return vmcs_readl(field); | |
1463 | } | |
1464 | ||
96304217 | 1465 | static __always_inline u32 vmcs_read32(unsigned long field) |
6aa8b732 AK |
1466 | { |
1467 | return vmcs_readl(field); | |
1468 | } | |
1469 | ||
96304217 | 1470 | static __always_inline u64 vmcs_read64(unsigned long field) |
6aa8b732 | 1471 | { |
05b3e0c2 | 1472 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
1473 | return vmcs_readl(field); |
1474 | #else | |
1475 | return vmcs_readl(field) | ((u64)vmcs_readl(field+1) << 32); | |
1476 | #endif | |
1477 | } | |
1478 | ||
e52de1b8 AK |
1479 | static noinline void vmwrite_error(unsigned long field, unsigned long value) |
1480 | { | |
1481 | printk(KERN_ERR "vmwrite error: reg %lx value %lx (err %d)\n", | |
1482 | field, value, vmcs_read32(VM_INSTRUCTION_ERROR)); | |
1483 | dump_stack(); | |
1484 | } | |
1485 | ||
6aa8b732 AK |
1486 | static void vmcs_writel(unsigned long field, unsigned long value) |
1487 | { | |
1488 | u8 error; | |
1489 | ||
4ecac3fd | 1490 | asm volatile (__ex(ASM_VMX_VMWRITE_RAX_RDX) "; setna %0" |
d77c26fc | 1491 | : "=q"(error) : "a"(value), "d"(field) : "cc"); |
e52de1b8 AK |
1492 | if (unlikely(error)) |
1493 | vmwrite_error(field, value); | |
6aa8b732 AK |
1494 | } |
1495 | ||
1496 | static void vmcs_write16(unsigned long field, u16 value) | |
1497 | { | |
1498 | vmcs_writel(field, value); | |
1499 | } | |
1500 | ||
1501 | static void vmcs_write32(unsigned long field, u32 value) | |
1502 | { | |
1503 | vmcs_writel(field, value); | |
1504 | } | |
1505 | ||
1506 | static void vmcs_write64(unsigned long field, u64 value) | |
1507 | { | |
6aa8b732 | 1508 | vmcs_writel(field, value); |
7682f2d0 | 1509 | #ifndef CONFIG_X86_64 |
6aa8b732 AK |
1510 | asm volatile (""); |
1511 | vmcs_writel(field+1, value >> 32); | |
1512 | #endif | |
1513 | } | |
1514 | ||
2ab455cc AL |
1515 | static void vmcs_clear_bits(unsigned long field, u32 mask) |
1516 | { | |
1517 | vmcs_writel(field, vmcs_readl(field) & ~mask); | |
1518 | } | |
1519 | ||
1520 | static void vmcs_set_bits(unsigned long field, u32 mask) | |
1521 | { | |
1522 | vmcs_writel(field, vmcs_readl(field) | mask); | |
1523 | } | |
1524 | ||
2961e876 GN |
1525 | static inline void vm_entry_controls_init(struct vcpu_vmx *vmx, u32 val) |
1526 | { | |
1527 | vmcs_write32(VM_ENTRY_CONTROLS, val); | |
1528 | vmx->vm_entry_controls_shadow = val; | |
1529 | } | |
1530 | ||
1531 | static inline void vm_entry_controls_set(struct vcpu_vmx *vmx, u32 val) | |
1532 | { | |
1533 | if (vmx->vm_entry_controls_shadow != val) | |
1534 | vm_entry_controls_init(vmx, val); | |
1535 | } | |
1536 | ||
1537 | static inline u32 vm_entry_controls_get(struct vcpu_vmx *vmx) | |
1538 | { | |
1539 | return vmx->vm_entry_controls_shadow; | |
1540 | } | |
1541 | ||
1542 | ||
1543 | static inline void vm_entry_controls_setbit(struct vcpu_vmx *vmx, u32 val) | |
1544 | { | |
1545 | vm_entry_controls_set(vmx, vm_entry_controls_get(vmx) | val); | |
1546 | } | |
1547 | ||
1548 | static inline void vm_entry_controls_clearbit(struct vcpu_vmx *vmx, u32 val) | |
1549 | { | |
1550 | vm_entry_controls_set(vmx, vm_entry_controls_get(vmx) & ~val); | |
1551 | } | |
1552 | ||
1553 | static inline void vm_exit_controls_init(struct vcpu_vmx *vmx, u32 val) | |
1554 | { | |
1555 | vmcs_write32(VM_EXIT_CONTROLS, val); | |
1556 | vmx->vm_exit_controls_shadow = val; | |
1557 | } | |
1558 | ||
1559 | static inline void vm_exit_controls_set(struct vcpu_vmx *vmx, u32 val) | |
1560 | { | |
1561 | if (vmx->vm_exit_controls_shadow != val) | |
1562 | vm_exit_controls_init(vmx, val); | |
1563 | } | |
1564 | ||
1565 | static inline u32 vm_exit_controls_get(struct vcpu_vmx *vmx) | |
1566 | { | |
1567 | return vmx->vm_exit_controls_shadow; | |
1568 | } | |
1569 | ||
1570 | ||
1571 | static inline void vm_exit_controls_setbit(struct vcpu_vmx *vmx, u32 val) | |
1572 | { | |
1573 | vm_exit_controls_set(vmx, vm_exit_controls_get(vmx) | val); | |
1574 | } | |
1575 | ||
1576 | static inline void vm_exit_controls_clearbit(struct vcpu_vmx *vmx, u32 val) | |
1577 | { | |
1578 | vm_exit_controls_set(vmx, vm_exit_controls_get(vmx) & ~val); | |
1579 | } | |
1580 | ||
2fb92db1 AK |
1581 | static void vmx_segment_cache_clear(struct vcpu_vmx *vmx) |
1582 | { | |
1583 | vmx->segment_cache.bitmask = 0; | |
1584 | } | |
1585 | ||
1586 | static bool vmx_segment_cache_test_set(struct vcpu_vmx *vmx, unsigned seg, | |
1587 | unsigned field) | |
1588 | { | |
1589 | bool ret; | |
1590 | u32 mask = 1 << (seg * SEG_FIELD_NR + field); | |
1591 | ||
1592 | if (!(vmx->vcpu.arch.regs_avail & (1 << VCPU_EXREG_SEGMENTS))) { | |
1593 | vmx->vcpu.arch.regs_avail |= (1 << VCPU_EXREG_SEGMENTS); | |
1594 | vmx->segment_cache.bitmask = 0; | |
1595 | } | |
1596 | ret = vmx->segment_cache.bitmask & mask; | |
1597 | vmx->segment_cache.bitmask |= mask; | |
1598 | return ret; | |
1599 | } | |
1600 | ||
1601 | static u16 vmx_read_guest_seg_selector(struct vcpu_vmx *vmx, unsigned seg) | |
1602 | { | |
1603 | u16 *p = &vmx->segment_cache.seg[seg].selector; | |
1604 | ||
1605 | if (!vmx_segment_cache_test_set(vmx, seg, SEG_FIELD_SEL)) | |
1606 | *p = vmcs_read16(kvm_vmx_segment_fields[seg].selector); | |
1607 | return *p; | |
1608 | } | |
1609 | ||
1610 | static ulong vmx_read_guest_seg_base(struct vcpu_vmx *vmx, unsigned seg) | |
1611 | { | |
1612 | ulong *p = &vmx->segment_cache.seg[seg].base; | |
1613 | ||
1614 | if (!vmx_segment_cache_test_set(vmx, seg, SEG_FIELD_BASE)) | |
1615 | *p = vmcs_readl(kvm_vmx_segment_fields[seg].base); | |
1616 | return *p; | |
1617 | } | |
1618 | ||
1619 | static u32 vmx_read_guest_seg_limit(struct vcpu_vmx *vmx, unsigned seg) | |
1620 | { | |
1621 | u32 *p = &vmx->segment_cache.seg[seg].limit; | |
1622 | ||
1623 | if (!vmx_segment_cache_test_set(vmx, seg, SEG_FIELD_LIMIT)) | |
1624 | *p = vmcs_read32(kvm_vmx_segment_fields[seg].limit); | |
1625 | return *p; | |
1626 | } | |
1627 | ||
1628 | static u32 vmx_read_guest_seg_ar(struct vcpu_vmx *vmx, unsigned seg) | |
1629 | { | |
1630 | u32 *p = &vmx->segment_cache.seg[seg].ar; | |
1631 | ||
1632 | if (!vmx_segment_cache_test_set(vmx, seg, SEG_FIELD_AR)) | |
1633 | *p = vmcs_read32(kvm_vmx_segment_fields[seg].ar_bytes); | |
1634 | return *p; | |
1635 | } | |
1636 | ||
abd3f2d6 AK |
1637 | static void update_exception_bitmap(struct kvm_vcpu *vcpu) |
1638 | { | |
1639 | u32 eb; | |
1640 | ||
fd7373cc | 1641 | eb = (1u << PF_VECTOR) | (1u << UD_VECTOR) | (1u << MC_VECTOR) | |
54a20552 | 1642 | (1u << NM_VECTOR) | (1u << DB_VECTOR) | (1u << AC_VECTOR); |
fd7373cc JK |
1643 | if ((vcpu->guest_debug & |
1644 | (KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_SW_BP)) == | |
1645 | (KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_SW_BP)) | |
1646 | eb |= 1u << BP_VECTOR; | |
7ffd92c5 | 1647 | if (to_vmx(vcpu)->rmode.vm86_active) |
abd3f2d6 | 1648 | eb = ~0; |
089d034e | 1649 | if (enable_ept) |
1439442c | 1650 | eb &= ~(1u << PF_VECTOR); /* bypass_guest_pf = 0 */ |
02daab21 AK |
1651 | if (vcpu->fpu_active) |
1652 | eb &= ~(1u << NM_VECTOR); | |
36cf24e0 NHE |
1653 | |
1654 | /* When we are running a nested L2 guest and L1 specified for it a | |
1655 | * certain exception bitmap, we must trap the same exceptions and pass | |
1656 | * them to L1. When running L2, we will only handle the exceptions | |
1657 | * specified above if L1 did not want them. | |
1658 | */ | |
1659 | if (is_guest_mode(vcpu)) | |
1660 | eb |= get_vmcs12(vcpu)->exception_bitmap; | |
1661 | ||
abd3f2d6 AK |
1662 | vmcs_write32(EXCEPTION_BITMAP, eb); |
1663 | } | |
1664 | ||
2961e876 GN |
1665 | static void clear_atomic_switch_msr_special(struct vcpu_vmx *vmx, |
1666 | unsigned long entry, unsigned long exit) | |
8bf00a52 | 1667 | { |
2961e876 GN |
1668 | vm_entry_controls_clearbit(vmx, entry); |
1669 | vm_exit_controls_clearbit(vmx, exit); | |
8bf00a52 GN |
1670 | } |
1671 | ||
61d2ef2c AK |
1672 | static void clear_atomic_switch_msr(struct vcpu_vmx *vmx, unsigned msr) |
1673 | { | |
1674 | unsigned i; | |
1675 | struct msr_autoload *m = &vmx->msr_autoload; | |
1676 | ||
8bf00a52 GN |
1677 | switch (msr) { |
1678 | case MSR_EFER: | |
1679 | if (cpu_has_load_ia32_efer) { | |
2961e876 GN |
1680 | clear_atomic_switch_msr_special(vmx, |
1681 | VM_ENTRY_LOAD_IA32_EFER, | |
8bf00a52 GN |
1682 | VM_EXIT_LOAD_IA32_EFER); |
1683 | return; | |
1684 | } | |
1685 | break; | |
1686 | case MSR_CORE_PERF_GLOBAL_CTRL: | |
1687 | if (cpu_has_load_perf_global_ctrl) { | |
2961e876 | 1688 | clear_atomic_switch_msr_special(vmx, |
8bf00a52 GN |
1689 | VM_ENTRY_LOAD_IA32_PERF_GLOBAL_CTRL, |
1690 | VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL); | |
1691 | return; | |
1692 | } | |
1693 | break; | |
110312c8 AK |
1694 | } |
1695 | ||
61d2ef2c AK |
1696 | for (i = 0; i < m->nr; ++i) |
1697 | if (m->guest[i].index == msr) | |
1698 | break; | |
1699 | ||
1700 | if (i == m->nr) | |
1701 | return; | |
1702 | --m->nr; | |
1703 | m->guest[i] = m->guest[m->nr]; | |
1704 | m->host[i] = m->host[m->nr]; | |
1705 | vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, m->nr); | |
1706 | vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, m->nr); | |
1707 | } | |
1708 | ||
2961e876 GN |
1709 | static void add_atomic_switch_msr_special(struct vcpu_vmx *vmx, |
1710 | unsigned long entry, unsigned long exit, | |
1711 | unsigned long guest_val_vmcs, unsigned long host_val_vmcs, | |
1712 | u64 guest_val, u64 host_val) | |
8bf00a52 GN |
1713 | { |
1714 | vmcs_write64(guest_val_vmcs, guest_val); | |
1715 | vmcs_write64(host_val_vmcs, host_val); | |
2961e876 GN |
1716 | vm_entry_controls_setbit(vmx, entry); |
1717 | vm_exit_controls_setbit(vmx, exit); | |
8bf00a52 GN |
1718 | } |
1719 | ||
61d2ef2c AK |
1720 | static void add_atomic_switch_msr(struct vcpu_vmx *vmx, unsigned msr, |
1721 | u64 guest_val, u64 host_val) | |
1722 | { | |
1723 | unsigned i; | |
1724 | struct msr_autoload *m = &vmx->msr_autoload; | |
1725 | ||
8bf00a52 GN |
1726 | switch (msr) { |
1727 | case MSR_EFER: | |
1728 | if (cpu_has_load_ia32_efer) { | |
2961e876 GN |
1729 | add_atomic_switch_msr_special(vmx, |
1730 | VM_ENTRY_LOAD_IA32_EFER, | |
8bf00a52 GN |
1731 | VM_EXIT_LOAD_IA32_EFER, |
1732 | GUEST_IA32_EFER, | |
1733 | HOST_IA32_EFER, | |
1734 | guest_val, host_val); | |
1735 | return; | |
1736 | } | |
1737 | break; | |
1738 | case MSR_CORE_PERF_GLOBAL_CTRL: | |
1739 | if (cpu_has_load_perf_global_ctrl) { | |
2961e876 | 1740 | add_atomic_switch_msr_special(vmx, |
8bf00a52 GN |
1741 | VM_ENTRY_LOAD_IA32_PERF_GLOBAL_CTRL, |
1742 | VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL, | |
1743 | GUEST_IA32_PERF_GLOBAL_CTRL, | |
1744 | HOST_IA32_PERF_GLOBAL_CTRL, | |
1745 | guest_val, host_val); | |
1746 | return; | |
1747 | } | |
1748 | break; | |
110312c8 AK |
1749 | } |
1750 | ||
61d2ef2c AK |
1751 | for (i = 0; i < m->nr; ++i) |
1752 | if (m->guest[i].index == msr) | |
1753 | break; | |
1754 | ||
e7fc6f93 | 1755 | if (i == NR_AUTOLOAD_MSRS) { |
60266204 | 1756 | printk_once(KERN_WARNING "Not enough msr switch entries. " |
e7fc6f93 GN |
1757 | "Can't add msr %x\n", msr); |
1758 | return; | |
1759 | } else if (i == m->nr) { | |
61d2ef2c AK |
1760 | ++m->nr; |
1761 | vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, m->nr); | |
1762 | vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, m->nr); | |
1763 | } | |
1764 | ||
1765 | m->guest[i].index = msr; | |
1766 | m->guest[i].value = guest_val; | |
1767 | m->host[i].index = msr; | |
1768 | m->host[i].value = host_val; | |
1769 | } | |
1770 | ||
33ed6329 AK |
1771 | static void reload_tss(void) |
1772 | { | |
33ed6329 AK |
1773 | /* |
1774 | * VT restores TR but not its size. Useless. | |
1775 | */ | |
89cbc767 | 1776 | struct desc_ptr *gdt = this_cpu_ptr(&host_gdt); |
a5f61300 | 1777 | struct desc_struct *descs; |
33ed6329 | 1778 | |
d359192f | 1779 | descs = (void *)gdt->address; |
33ed6329 AK |
1780 | descs[GDT_ENTRY_TSS].type = 9; /* available TSS */ |
1781 | load_TR_desc(); | |
33ed6329 AK |
1782 | } |
1783 | ||
92c0d900 | 1784 | static bool update_transition_efer(struct vcpu_vmx *vmx, int efer_offset) |
2cc51560 | 1785 | { |
3a34a881 | 1786 | u64 guest_efer; |
51c6cf66 AK |
1787 | u64 ignore_bits; |
1788 | ||
f6801dff | 1789 | guest_efer = vmx->vcpu.arch.efer; |
3a34a881 | 1790 | |
51c6cf66 | 1791 | /* |
0fa06071 | 1792 | * NX is emulated; LMA and LME handled by hardware; SCE meaningless |
51c6cf66 AK |
1793 | * outside long mode |
1794 | */ | |
1795 | ignore_bits = EFER_NX | EFER_SCE; | |
1796 | #ifdef CONFIG_X86_64 | |
1797 | ignore_bits |= EFER_LMA | EFER_LME; | |
1798 | /* SCE is meaningful only in long mode on Intel */ | |
1799 | if (guest_efer & EFER_LMA) | |
1800 | ignore_bits &= ~(u64)EFER_SCE; | |
1801 | #endif | |
51c6cf66 AK |
1802 | guest_efer &= ~ignore_bits; |
1803 | guest_efer |= host_efer & ignore_bits; | |
26bb0981 | 1804 | vmx->guest_msrs[efer_offset].data = guest_efer; |
d5696725 | 1805 | vmx->guest_msrs[efer_offset].mask = ~ignore_bits; |
84ad33ef AK |
1806 | |
1807 | clear_atomic_switch_msr(vmx, MSR_EFER); | |
f6577a5f AL |
1808 | |
1809 | /* | |
1810 | * On EPT, we can't emulate NX, so we must switch EFER atomically. | |
1811 | * On CPUs that support "load IA32_EFER", always switch EFER | |
1812 | * atomically, since it's faster than switching it manually. | |
1813 | */ | |
1814 | if (cpu_has_load_ia32_efer || | |
1815 | (enable_ept && ((vmx->vcpu.arch.efer ^ host_efer) & EFER_NX))) { | |
84ad33ef AK |
1816 | guest_efer = vmx->vcpu.arch.efer; |
1817 | if (!(guest_efer & EFER_LMA)) | |
1818 | guest_efer &= ~EFER_LME; | |
54b98bff AL |
1819 | if (guest_efer != host_efer) |
1820 | add_atomic_switch_msr(vmx, MSR_EFER, | |
1821 | guest_efer, host_efer); | |
84ad33ef AK |
1822 | return false; |
1823 | } | |
1824 | ||
26bb0981 | 1825 | return true; |
51c6cf66 AK |
1826 | } |
1827 | ||
2d49ec72 GN |
1828 | static unsigned long segment_base(u16 selector) |
1829 | { | |
89cbc767 | 1830 | struct desc_ptr *gdt = this_cpu_ptr(&host_gdt); |
2d49ec72 GN |
1831 | struct desc_struct *d; |
1832 | unsigned long table_base; | |
1833 | unsigned long v; | |
1834 | ||
1835 | if (!(selector & ~3)) | |
1836 | return 0; | |
1837 | ||
d359192f | 1838 | table_base = gdt->address; |
2d49ec72 GN |
1839 | |
1840 | if (selector & 4) { /* from ldt */ | |
1841 | u16 ldt_selector = kvm_read_ldt(); | |
1842 | ||
1843 | if (!(ldt_selector & ~3)) | |
1844 | return 0; | |
1845 | ||
1846 | table_base = segment_base(ldt_selector); | |
1847 | } | |
1848 | d = (struct desc_struct *)(table_base + (selector & ~7)); | |
1849 | v = get_desc_base(d); | |
1850 | #ifdef CONFIG_X86_64 | |
1851 | if (d->s == 0 && (d->type == 2 || d->type == 9 || d->type == 11)) | |
1852 | v |= ((unsigned long)((struct ldttss_desc64 *)d)->base3) << 32; | |
1853 | #endif | |
1854 | return v; | |
1855 | } | |
1856 | ||
1857 | static inline unsigned long kvm_read_tr_base(void) | |
1858 | { | |
1859 | u16 tr; | |
1860 | asm("str %0" : "=g"(tr)); | |
1861 | return segment_base(tr); | |
1862 | } | |
1863 | ||
04d2cc77 | 1864 | static void vmx_save_host_state(struct kvm_vcpu *vcpu) |
33ed6329 | 1865 | { |
04d2cc77 | 1866 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
26bb0981 | 1867 | int i; |
04d2cc77 | 1868 | |
a2fa3e9f | 1869 | if (vmx->host_state.loaded) |
33ed6329 AK |
1870 | return; |
1871 | ||
a2fa3e9f | 1872 | vmx->host_state.loaded = 1; |
33ed6329 AK |
1873 | /* |
1874 | * Set host fs and gs selectors. Unfortunately, 22.2.3 does not | |
1875 | * allow segment selectors with cpl > 0 or ti == 1. | |
1876 | */ | |
d6e88aec | 1877 | vmx->host_state.ldt_sel = kvm_read_ldt(); |
152d3f2f | 1878 | vmx->host_state.gs_ldt_reload_needed = vmx->host_state.ldt_sel; |
9581d442 | 1879 | savesegment(fs, vmx->host_state.fs_sel); |
152d3f2f | 1880 | if (!(vmx->host_state.fs_sel & 7)) { |
a2fa3e9f | 1881 | vmcs_write16(HOST_FS_SELECTOR, vmx->host_state.fs_sel); |
152d3f2f LV |
1882 | vmx->host_state.fs_reload_needed = 0; |
1883 | } else { | |
33ed6329 | 1884 | vmcs_write16(HOST_FS_SELECTOR, 0); |
152d3f2f | 1885 | vmx->host_state.fs_reload_needed = 1; |
33ed6329 | 1886 | } |
9581d442 | 1887 | savesegment(gs, vmx->host_state.gs_sel); |
a2fa3e9f GH |
1888 | if (!(vmx->host_state.gs_sel & 7)) |
1889 | vmcs_write16(HOST_GS_SELECTOR, vmx->host_state.gs_sel); | |
33ed6329 AK |
1890 | else { |
1891 | vmcs_write16(HOST_GS_SELECTOR, 0); | |
152d3f2f | 1892 | vmx->host_state.gs_ldt_reload_needed = 1; |
33ed6329 AK |
1893 | } |
1894 | ||
b2da15ac AK |
1895 | #ifdef CONFIG_X86_64 |
1896 | savesegment(ds, vmx->host_state.ds_sel); | |
1897 | savesegment(es, vmx->host_state.es_sel); | |
1898 | #endif | |
1899 | ||
33ed6329 AK |
1900 | #ifdef CONFIG_X86_64 |
1901 | vmcs_writel(HOST_FS_BASE, read_msr(MSR_FS_BASE)); | |
1902 | vmcs_writel(HOST_GS_BASE, read_msr(MSR_GS_BASE)); | |
1903 | #else | |
a2fa3e9f GH |
1904 | vmcs_writel(HOST_FS_BASE, segment_base(vmx->host_state.fs_sel)); |
1905 | vmcs_writel(HOST_GS_BASE, segment_base(vmx->host_state.gs_sel)); | |
33ed6329 | 1906 | #endif |
707c0874 AK |
1907 | |
1908 | #ifdef CONFIG_X86_64 | |
c8770e7b AK |
1909 | rdmsrl(MSR_KERNEL_GS_BASE, vmx->msr_host_kernel_gs_base); |
1910 | if (is_long_mode(&vmx->vcpu)) | |
44ea2b17 | 1911 | wrmsrl(MSR_KERNEL_GS_BASE, vmx->msr_guest_kernel_gs_base); |
707c0874 | 1912 | #endif |
da8999d3 LJ |
1913 | if (boot_cpu_has(X86_FEATURE_MPX)) |
1914 | rdmsrl(MSR_IA32_BNDCFGS, vmx->host_state.msr_host_bndcfgs); | |
26bb0981 AK |
1915 | for (i = 0; i < vmx->save_nmsrs; ++i) |
1916 | kvm_set_shared_msr(vmx->guest_msrs[i].index, | |
d5696725 AK |
1917 | vmx->guest_msrs[i].data, |
1918 | vmx->guest_msrs[i].mask); | |
33ed6329 AK |
1919 | } |
1920 | ||
a9b21b62 | 1921 | static void __vmx_load_host_state(struct vcpu_vmx *vmx) |
33ed6329 | 1922 | { |
a2fa3e9f | 1923 | if (!vmx->host_state.loaded) |
33ed6329 AK |
1924 | return; |
1925 | ||
e1beb1d3 | 1926 | ++vmx->vcpu.stat.host_state_reload; |
a2fa3e9f | 1927 | vmx->host_state.loaded = 0; |
c8770e7b AK |
1928 | #ifdef CONFIG_X86_64 |
1929 | if (is_long_mode(&vmx->vcpu)) | |
1930 | rdmsrl(MSR_KERNEL_GS_BASE, vmx->msr_guest_kernel_gs_base); | |
1931 | #endif | |
152d3f2f | 1932 | if (vmx->host_state.gs_ldt_reload_needed) { |
d6e88aec | 1933 | kvm_load_ldt(vmx->host_state.ldt_sel); |
33ed6329 | 1934 | #ifdef CONFIG_X86_64 |
9581d442 | 1935 | load_gs_index(vmx->host_state.gs_sel); |
9581d442 AK |
1936 | #else |
1937 | loadsegment(gs, vmx->host_state.gs_sel); | |
33ed6329 | 1938 | #endif |
33ed6329 | 1939 | } |
0a77fe4c AK |
1940 | if (vmx->host_state.fs_reload_needed) |
1941 | loadsegment(fs, vmx->host_state.fs_sel); | |
b2da15ac AK |
1942 | #ifdef CONFIG_X86_64 |
1943 | if (unlikely(vmx->host_state.ds_sel | vmx->host_state.es_sel)) { | |
1944 | loadsegment(ds, vmx->host_state.ds_sel); | |
1945 | loadsegment(es, vmx->host_state.es_sel); | |
1946 | } | |
b2da15ac | 1947 | #endif |
152d3f2f | 1948 | reload_tss(); |
44ea2b17 | 1949 | #ifdef CONFIG_X86_64 |
c8770e7b | 1950 | wrmsrl(MSR_KERNEL_GS_BASE, vmx->msr_host_kernel_gs_base); |
44ea2b17 | 1951 | #endif |
da8999d3 LJ |
1952 | if (vmx->host_state.msr_host_bndcfgs) |
1953 | wrmsrl(MSR_IA32_BNDCFGS, vmx->host_state.msr_host_bndcfgs); | |
b1a74bf8 SS |
1954 | /* |
1955 | * If the FPU is not active (through the host task or | |
1956 | * the guest vcpu), then restore the cr0.TS bit. | |
1957 | */ | |
3c6dffa9 | 1958 | if (!fpregs_active() && !vmx->vcpu.guest_fpu_loaded) |
b1a74bf8 | 1959 | stts(); |
89cbc767 | 1960 | load_gdt(this_cpu_ptr(&host_gdt)); |
33ed6329 AK |
1961 | } |
1962 | ||
a9b21b62 AK |
1963 | static void vmx_load_host_state(struct vcpu_vmx *vmx) |
1964 | { | |
1965 | preempt_disable(); | |
1966 | __vmx_load_host_state(vmx); | |
1967 | preempt_enable(); | |
1968 | } | |
1969 | ||
28b835d6 FW |
1970 | static void vmx_vcpu_pi_load(struct kvm_vcpu *vcpu, int cpu) |
1971 | { | |
1972 | struct pi_desc *pi_desc = vcpu_to_pi_desc(vcpu); | |
1973 | struct pi_desc old, new; | |
1974 | unsigned int dest; | |
1975 | ||
1976 | if (!kvm_arch_has_assigned_device(vcpu->kvm) || | |
1977 | !irq_remapping_cap(IRQ_POSTING_CAP)) | |
1978 | return; | |
1979 | ||
1980 | do { | |
1981 | old.control = new.control = pi_desc->control; | |
1982 | ||
1983 | /* | |
1984 | * If 'nv' field is POSTED_INTR_WAKEUP_VECTOR, there | |
1985 | * are two possible cases: | |
1986 | * 1. After running 'pre_block', context switch | |
1987 | * happened. For this case, 'sn' was set in | |
1988 | * vmx_vcpu_put(), so we need to clear it here. | |
1989 | * 2. After running 'pre_block', we were blocked, | |
1990 | * and woken up by some other guy. For this case, | |
1991 | * we don't need to do anything, 'pi_post_block' | |
1992 | * will do everything for us. However, we cannot | |
1993 | * check whether it is case #1 or case #2 here | |
1994 | * (maybe, not needed), so we also clear sn here, | |
1995 | * I think it is not a big deal. | |
1996 | */ | |
1997 | if (pi_desc->nv != POSTED_INTR_WAKEUP_VECTOR) { | |
1998 | if (vcpu->cpu != cpu) { | |
1999 | dest = cpu_physical_id(cpu); | |
2000 | ||
2001 | if (x2apic_enabled()) | |
2002 | new.ndst = dest; | |
2003 | else | |
2004 | new.ndst = (dest << 8) & 0xFF00; | |
2005 | } | |
2006 | ||
2007 | /* set 'NV' to 'notification vector' */ | |
2008 | new.nv = POSTED_INTR_VECTOR; | |
2009 | } | |
2010 | ||
2011 | /* Allow posting non-urgent interrupts */ | |
2012 | new.sn = 0; | |
2013 | } while (cmpxchg(&pi_desc->control, old.control, | |
2014 | new.control) != old.control); | |
2015 | } | |
6aa8b732 AK |
2016 | /* |
2017 | * Switches to specified vcpu, until a matching vcpu_put(), but assumes | |
2018 | * vcpu mutex is already taken. | |
2019 | */ | |
15ad7146 | 2020 | static void vmx_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
6aa8b732 | 2021 | { |
a2fa3e9f | 2022 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
4610c9cc | 2023 | u64 phys_addr = __pa(per_cpu(vmxarea, cpu)); |
6aa8b732 | 2024 | |
4610c9cc DX |
2025 | if (!vmm_exclusive) |
2026 | kvm_cpu_vmxon(phys_addr); | |
d462b819 NHE |
2027 | else if (vmx->loaded_vmcs->cpu != cpu) |
2028 | loaded_vmcs_clear(vmx->loaded_vmcs); | |
6aa8b732 | 2029 | |
d462b819 NHE |
2030 | if (per_cpu(current_vmcs, cpu) != vmx->loaded_vmcs->vmcs) { |
2031 | per_cpu(current_vmcs, cpu) = vmx->loaded_vmcs->vmcs; | |
2032 | vmcs_load(vmx->loaded_vmcs->vmcs); | |
6aa8b732 AK |
2033 | } |
2034 | ||
d462b819 | 2035 | if (vmx->loaded_vmcs->cpu != cpu) { |
89cbc767 | 2036 | struct desc_ptr *gdt = this_cpu_ptr(&host_gdt); |
6aa8b732 AK |
2037 | unsigned long sysenter_esp; |
2038 | ||
a8eeb04a | 2039 | kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); |
92fe13be | 2040 | local_irq_disable(); |
8f536b76 | 2041 | crash_disable_local_vmclear(cpu); |
5a560f8b XG |
2042 | |
2043 | /* | |
2044 | * Read loaded_vmcs->cpu should be before fetching | |
2045 | * loaded_vmcs->loaded_vmcss_on_cpu_link. | |
2046 | * See the comments in __loaded_vmcs_clear(). | |
2047 | */ | |
2048 | smp_rmb(); | |
2049 | ||
d462b819 NHE |
2050 | list_add(&vmx->loaded_vmcs->loaded_vmcss_on_cpu_link, |
2051 | &per_cpu(loaded_vmcss_on_cpu, cpu)); | |
8f536b76 | 2052 | crash_enable_local_vmclear(cpu); |
92fe13be DX |
2053 | local_irq_enable(); |
2054 | ||
6aa8b732 AK |
2055 | /* |
2056 | * Linux uses per-cpu TSS and GDT, so set these when switching | |
2057 | * processors. | |
2058 | */ | |
d6e88aec | 2059 | vmcs_writel(HOST_TR_BASE, kvm_read_tr_base()); /* 22.2.4 */ |
d359192f | 2060 | vmcs_writel(HOST_GDTR_BASE, gdt->address); /* 22.2.4 */ |
6aa8b732 AK |
2061 | |
2062 | rdmsrl(MSR_IA32_SYSENTER_ESP, sysenter_esp); | |
2063 | vmcs_writel(HOST_IA32_SYSENTER_ESP, sysenter_esp); /* 22.2.3 */ | |
ff2c3a18 HZ |
2064 | |
2065 | /* Setup TSC multiplier */ | |
2066 | if (cpu_has_vmx_tsc_scaling()) | |
2067 | vmcs_write64(TSC_MULTIPLIER, | |
2068 | vcpu->arch.tsc_scaling_ratio); | |
2069 | ||
d462b819 | 2070 | vmx->loaded_vmcs->cpu = cpu; |
6aa8b732 | 2071 | } |
28b835d6 FW |
2072 | |
2073 | vmx_vcpu_pi_load(vcpu, cpu); | |
2074 | } | |
2075 | ||
2076 | static void vmx_vcpu_pi_put(struct kvm_vcpu *vcpu) | |
2077 | { | |
2078 | struct pi_desc *pi_desc = vcpu_to_pi_desc(vcpu); | |
2079 | ||
2080 | if (!kvm_arch_has_assigned_device(vcpu->kvm) || | |
2081 | !irq_remapping_cap(IRQ_POSTING_CAP)) | |
2082 | return; | |
2083 | ||
2084 | /* Set SN when the vCPU is preempted */ | |
2085 | if (vcpu->preempted) | |
2086 | pi_set_sn(pi_desc); | |
6aa8b732 AK |
2087 | } |
2088 | ||
2089 | static void vmx_vcpu_put(struct kvm_vcpu *vcpu) | |
2090 | { | |
28b835d6 FW |
2091 | vmx_vcpu_pi_put(vcpu); |
2092 | ||
a9b21b62 | 2093 | __vmx_load_host_state(to_vmx(vcpu)); |
4610c9cc | 2094 | if (!vmm_exclusive) { |
d462b819 NHE |
2095 | __loaded_vmcs_clear(to_vmx(vcpu)->loaded_vmcs); |
2096 | vcpu->cpu = -1; | |
4610c9cc DX |
2097 | kvm_cpu_vmxoff(); |
2098 | } | |
6aa8b732 AK |
2099 | } |
2100 | ||
5fd86fcf AK |
2101 | static void vmx_fpu_activate(struct kvm_vcpu *vcpu) |
2102 | { | |
81231c69 AK |
2103 | ulong cr0; |
2104 | ||
5fd86fcf AK |
2105 | if (vcpu->fpu_active) |
2106 | return; | |
2107 | vcpu->fpu_active = 1; | |
81231c69 AK |
2108 | cr0 = vmcs_readl(GUEST_CR0); |
2109 | cr0 &= ~(X86_CR0_TS | X86_CR0_MP); | |
2110 | cr0 |= kvm_read_cr0_bits(vcpu, X86_CR0_TS | X86_CR0_MP); | |
2111 | vmcs_writel(GUEST_CR0, cr0); | |
5fd86fcf | 2112 | update_exception_bitmap(vcpu); |
edcafe3c | 2113 | vcpu->arch.cr0_guest_owned_bits = X86_CR0_TS; |
36cf24e0 NHE |
2114 | if (is_guest_mode(vcpu)) |
2115 | vcpu->arch.cr0_guest_owned_bits &= | |
2116 | ~get_vmcs12(vcpu)->cr0_guest_host_mask; | |
edcafe3c | 2117 | vmcs_writel(CR0_GUEST_HOST_MASK, ~vcpu->arch.cr0_guest_owned_bits); |
5fd86fcf AK |
2118 | } |
2119 | ||
edcafe3c AK |
2120 | static void vmx_decache_cr0_guest_bits(struct kvm_vcpu *vcpu); |
2121 | ||
fe3ef05c NHE |
2122 | /* |
2123 | * Return the cr0 value that a nested guest would read. This is a combination | |
2124 | * of the real cr0 used to run the guest (guest_cr0), and the bits shadowed by | |
2125 | * its hypervisor (cr0_read_shadow). | |
2126 | */ | |
2127 | static inline unsigned long nested_read_cr0(struct vmcs12 *fields) | |
2128 | { | |
2129 | return (fields->guest_cr0 & ~fields->cr0_guest_host_mask) | | |
2130 | (fields->cr0_read_shadow & fields->cr0_guest_host_mask); | |
2131 | } | |
2132 | static inline unsigned long nested_read_cr4(struct vmcs12 *fields) | |
2133 | { | |
2134 | return (fields->guest_cr4 & ~fields->cr4_guest_host_mask) | | |
2135 | (fields->cr4_read_shadow & fields->cr4_guest_host_mask); | |
2136 | } | |
2137 | ||
5fd86fcf AK |
2138 | static void vmx_fpu_deactivate(struct kvm_vcpu *vcpu) |
2139 | { | |
36cf24e0 NHE |
2140 | /* Note that there is no vcpu->fpu_active = 0 here. The caller must |
2141 | * set this *before* calling this function. | |
2142 | */ | |
edcafe3c | 2143 | vmx_decache_cr0_guest_bits(vcpu); |
81231c69 | 2144 | vmcs_set_bits(GUEST_CR0, X86_CR0_TS | X86_CR0_MP); |
5fd86fcf | 2145 | update_exception_bitmap(vcpu); |
edcafe3c AK |
2146 | vcpu->arch.cr0_guest_owned_bits = 0; |
2147 | vmcs_writel(CR0_GUEST_HOST_MASK, ~vcpu->arch.cr0_guest_owned_bits); | |
36cf24e0 NHE |
2148 | if (is_guest_mode(vcpu)) { |
2149 | /* | |
2150 | * L1's specified read shadow might not contain the TS bit, | |
2151 | * so now that we turned on shadowing of this bit, we need to | |
2152 | * set this bit of the shadow. Like in nested_vmx_run we need | |
2153 | * nested_read_cr0(vmcs12), but vmcs12->guest_cr0 is not yet | |
2154 | * up-to-date here because we just decached cr0.TS (and we'll | |
2155 | * only update vmcs12->guest_cr0 on nested exit). | |
2156 | */ | |
2157 | struct vmcs12 *vmcs12 = get_vmcs12(vcpu); | |
2158 | vmcs12->guest_cr0 = (vmcs12->guest_cr0 & ~X86_CR0_TS) | | |
2159 | (vcpu->arch.cr0 & X86_CR0_TS); | |
2160 | vmcs_writel(CR0_READ_SHADOW, nested_read_cr0(vmcs12)); | |
2161 | } else | |
2162 | vmcs_writel(CR0_READ_SHADOW, vcpu->arch.cr0); | |
5fd86fcf AK |
2163 | } |
2164 | ||
6aa8b732 AK |
2165 | static unsigned long vmx_get_rflags(struct kvm_vcpu *vcpu) |
2166 | { | |
78ac8b47 | 2167 | unsigned long rflags, save_rflags; |
345dcaa8 | 2168 | |
6de12732 AK |
2169 | if (!test_bit(VCPU_EXREG_RFLAGS, (ulong *)&vcpu->arch.regs_avail)) { |
2170 | __set_bit(VCPU_EXREG_RFLAGS, (ulong *)&vcpu->arch.regs_avail); | |
2171 | rflags = vmcs_readl(GUEST_RFLAGS); | |
2172 | if (to_vmx(vcpu)->rmode.vm86_active) { | |
2173 | rflags &= RMODE_GUEST_OWNED_EFLAGS_BITS; | |
2174 | save_rflags = to_vmx(vcpu)->rmode.save_rflags; | |
2175 | rflags |= save_rflags & ~RMODE_GUEST_OWNED_EFLAGS_BITS; | |
2176 | } | |
2177 | to_vmx(vcpu)->rflags = rflags; | |
78ac8b47 | 2178 | } |
6de12732 | 2179 | return to_vmx(vcpu)->rflags; |
6aa8b732 AK |
2180 | } |
2181 | ||
2182 | static void vmx_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags) | |
2183 | { | |
6de12732 AK |
2184 | __set_bit(VCPU_EXREG_RFLAGS, (ulong *)&vcpu->arch.regs_avail); |
2185 | to_vmx(vcpu)->rflags = rflags; | |
78ac8b47 AK |
2186 | if (to_vmx(vcpu)->rmode.vm86_active) { |
2187 | to_vmx(vcpu)->rmode.save_rflags = rflags; | |
053de044 | 2188 | rflags |= X86_EFLAGS_IOPL | X86_EFLAGS_VM; |
78ac8b47 | 2189 | } |
6aa8b732 AK |
2190 | vmcs_writel(GUEST_RFLAGS, rflags); |
2191 | } | |
2192 | ||
37ccdcbe | 2193 | static u32 vmx_get_interrupt_shadow(struct kvm_vcpu *vcpu) |
2809f5d2 GC |
2194 | { |
2195 | u32 interruptibility = vmcs_read32(GUEST_INTERRUPTIBILITY_INFO); | |
2196 | int ret = 0; | |
2197 | ||
2198 | if (interruptibility & GUEST_INTR_STATE_STI) | |
48005f64 | 2199 | ret |= KVM_X86_SHADOW_INT_STI; |
2809f5d2 | 2200 | if (interruptibility & GUEST_INTR_STATE_MOV_SS) |
48005f64 | 2201 | ret |= KVM_X86_SHADOW_INT_MOV_SS; |
2809f5d2 | 2202 | |
37ccdcbe | 2203 | return ret; |
2809f5d2 GC |
2204 | } |
2205 | ||
2206 | static void vmx_set_interrupt_shadow(struct kvm_vcpu *vcpu, int mask) | |
2207 | { | |
2208 | u32 interruptibility_old = vmcs_read32(GUEST_INTERRUPTIBILITY_INFO); | |
2209 | u32 interruptibility = interruptibility_old; | |
2210 | ||
2211 | interruptibility &= ~(GUEST_INTR_STATE_STI | GUEST_INTR_STATE_MOV_SS); | |
2212 | ||
48005f64 | 2213 | if (mask & KVM_X86_SHADOW_INT_MOV_SS) |
2809f5d2 | 2214 | interruptibility |= GUEST_INTR_STATE_MOV_SS; |
48005f64 | 2215 | else if (mask & KVM_X86_SHADOW_INT_STI) |
2809f5d2 GC |
2216 | interruptibility |= GUEST_INTR_STATE_STI; |
2217 | ||
2218 | if ((interruptibility != interruptibility_old)) | |
2219 | vmcs_write32(GUEST_INTERRUPTIBILITY_INFO, interruptibility); | |
2220 | } | |
2221 | ||
6aa8b732 AK |
2222 | static void skip_emulated_instruction(struct kvm_vcpu *vcpu) |
2223 | { | |
2224 | unsigned long rip; | |
6aa8b732 | 2225 | |
5fdbf976 | 2226 | rip = kvm_rip_read(vcpu); |
6aa8b732 | 2227 | rip += vmcs_read32(VM_EXIT_INSTRUCTION_LEN); |
5fdbf976 | 2228 | kvm_rip_write(vcpu, rip); |
6aa8b732 | 2229 | |
2809f5d2 GC |
2230 | /* skipping an emulated instruction also counts */ |
2231 | vmx_set_interrupt_shadow(vcpu, 0); | |
6aa8b732 AK |
2232 | } |
2233 | ||
0b6ac343 NHE |
2234 | /* |
2235 | * KVM wants to inject page-faults which it got to the guest. This function | |
2236 | * checks whether in a nested guest, we need to inject them to L1 or L2. | |
0b6ac343 | 2237 | */ |
e011c663 | 2238 | static int nested_vmx_check_exception(struct kvm_vcpu *vcpu, unsigned nr) |
0b6ac343 NHE |
2239 | { |
2240 | struct vmcs12 *vmcs12 = get_vmcs12(vcpu); | |
2241 | ||
e011c663 | 2242 | if (!(vmcs12->exception_bitmap & (1u << nr))) |
0b6ac343 NHE |
2243 | return 0; |
2244 | ||
533558bc JK |
2245 | nested_vmx_vmexit(vcpu, to_vmx(vcpu)->exit_reason, |
2246 | vmcs_read32(VM_EXIT_INTR_INFO), | |
2247 | vmcs_readl(EXIT_QUALIFICATION)); | |
0b6ac343 NHE |
2248 | return 1; |
2249 | } | |
2250 | ||
298101da | 2251 | static void vmx_queue_exception(struct kvm_vcpu *vcpu, unsigned nr, |
ce7ddec4 JR |
2252 | bool has_error_code, u32 error_code, |
2253 | bool reinject) | |
298101da | 2254 | { |
77ab6db0 | 2255 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
8ab2d2e2 | 2256 | u32 intr_info = nr | INTR_INFO_VALID_MASK; |
77ab6db0 | 2257 | |
e011c663 GN |
2258 | if (!reinject && is_guest_mode(vcpu) && |
2259 | nested_vmx_check_exception(vcpu, nr)) | |
0b6ac343 NHE |
2260 | return; |
2261 | ||
8ab2d2e2 | 2262 | if (has_error_code) { |
77ab6db0 | 2263 | vmcs_write32(VM_ENTRY_EXCEPTION_ERROR_CODE, error_code); |
8ab2d2e2 JK |
2264 | intr_info |= INTR_INFO_DELIVER_CODE_MASK; |
2265 | } | |
77ab6db0 | 2266 | |
7ffd92c5 | 2267 | if (vmx->rmode.vm86_active) { |
71f9833b SH |
2268 | int inc_eip = 0; |
2269 | if (kvm_exception_is_soft(nr)) | |
2270 | inc_eip = vcpu->arch.event_exit_inst_len; | |
2271 | if (kvm_inject_realmode_interrupt(vcpu, nr, inc_eip) != EMULATE_DONE) | |
a92601bb | 2272 | kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu); |
77ab6db0 JK |
2273 | return; |
2274 | } | |
2275 | ||
66fd3f7f GN |
2276 | if (kvm_exception_is_soft(nr)) { |
2277 | vmcs_write32(VM_ENTRY_INSTRUCTION_LEN, | |
2278 | vmx->vcpu.arch.event_exit_inst_len); | |
8ab2d2e2 JK |
2279 | intr_info |= INTR_TYPE_SOFT_EXCEPTION; |
2280 | } else | |
2281 | intr_info |= INTR_TYPE_HARD_EXCEPTION; | |
2282 | ||
2283 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, intr_info); | |
298101da AK |
2284 | } |
2285 | ||
4e47c7a6 SY |
2286 | static bool vmx_rdtscp_supported(void) |
2287 | { | |
2288 | return cpu_has_vmx_rdtscp(); | |
2289 | } | |
2290 | ||
ad756a16 MJ |
2291 | static bool vmx_invpcid_supported(void) |
2292 | { | |
2293 | return cpu_has_vmx_invpcid() && enable_ept; | |
2294 | } | |
2295 | ||
a75beee6 ED |
2296 | /* |
2297 | * Swap MSR entry in host/guest MSR entry array. | |
2298 | */ | |
8b9cf98c | 2299 | static void move_msr_up(struct vcpu_vmx *vmx, int from, int to) |
a75beee6 | 2300 | { |
26bb0981 | 2301 | struct shared_msr_entry tmp; |
a2fa3e9f GH |
2302 | |
2303 | tmp = vmx->guest_msrs[to]; | |
2304 | vmx->guest_msrs[to] = vmx->guest_msrs[from]; | |
2305 | vmx->guest_msrs[from] = tmp; | |
a75beee6 ED |
2306 | } |
2307 | ||
8d14695f YZ |
2308 | static void vmx_set_msr_bitmap(struct kvm_vcpu *vcpu) |
2309 | { | |
2310 | unsigned long *msr_bitmap; | |
2311 | ||
670125bd WV |
2312 | if (is_guest_mode(vcpu)) |
2313 | msr_bitmap = vmx_msr_bitmap_nested; | |
8a9781f7 | 2314 | else if (vcpu->arch.apic_base & X2APIC_ENABLE) { |
8d14695f YZ |
2315 | if (is_long_mode(vcpu)) |
2316 | msr_bitmap = vmx_msr_bitmap_longmode_x2apic; | |
2317 | else | |
2318 | msr_bitmap = vmx_msr_bitmap_legacy_x2apic; | |
2319 | } else { | |
2320 | if (is_long_mode(vcpu)) | |
2321 | msr_bitmap = vmx_msr_bitmap_longmode; | |
2322 | else | |
2323 | msr_bitmap = vmx_msr_bitmap_legacy; | |
2324 | } | |
2325 | ||
2326 | vmcs_write64(MSR_BITMAP, __pa(msr_bitmap)); | |
2327 | } | |
2328 | ||
e38aea3e AK |
2329 | /* |
2330 | * Set up the vmcs to automatically save and restore system | |
2331 | * msrs. Don't touch the 64-bit msrs if the guest is in legacy | |
2332 | * mode, as fiddling with msrs is very expensive. | |
2333 | */ | |
8b9cf98c | 2334 | static void setup_msrs(struct vcpu_vmx *vmx) |
e38aea3e | 2335 | { |
26bb0981 | 2336 | int save_nmsrs, index; |
e38aea3e | 2337 | |
a75beee6 ED |
2338 | save_nmsrs = 0; |
2339 | #ifdef CONFIG_X86_64 | |
8b9cf98c | 2340 | if (is_long_mode(&vmx->vcpu)) { |
8b9cf98c | 2341 | index = __find_msr_index(vmx, MSR_SYSCALL_MASK); |
a75beee6 | 2342 | if (index >= 0) |
8b9cf98c RR |
2343 | move_msr_up(vmx, index, save_nmsrs++); |
2344 | index = __find_msr_index(vmx, MSR_LSTAR); | |
a75beee6 | 2345 | if (index >= 0) |
8b9cf98c RR |
2346 | move_msr_up(vmx, index, save_nmsrs++); |
2347 | index = __find_msr_index(vmx, MSR_CSTAR); | |
a75beee6 | 2348 | if (index >= 0) |
8b9cf98c | 2349 | move_msr_up(vmx, index, save_nmsrs++); |
4e47c7a6 | 2350 | index = __find_msr_index(vmx, MSR_TSC_AUX); |
1cea0ce6 | 2351 | if (index >= 0 && guest_cpuid_has_rdtscp(&vmx->vcpu)) |
4e47c7a6 | 2352 | move_msr_up(vmx, index, save_nmsrs++); |
a75beee6 | 2353 | /* |
8c06585d | 2354 | * MSR_STAR is only needed on long mode guests, and only |
a75beee6 ED |
2355 | * if efer.sce is enabled. |
2356 | */ | |
8c06585d | 2357 | index = __find_msr_index(vmx, MSR_STAR); |
f6801dff | 2358 | if ((index >= 0) && (vmx->vcpu.arch.efer & EFER_SCE)) |
8b9cf98c | 2359 | move_msr_up(vmx, index, save_nmsrs++); |
a75beee6 ED |
2360 | } |
2361 | #endif | |
92c0d900 AK |
2362 | index = __find_msr_index(vmx, MSR_EFER); |
2363 | if (index >= 0 && update_transition_efer(vmx, index)) | |
26bb0981 | 2364 | move_msr_up(vmx, index, save_nmsrs++); |
e38aea3e | 2365 | |
26bb0981 | 2366 | vmx->save_nmsrs = save_nmsrs; |
5897297b | 2367 | |
8d14695f YZ |
2368 | if (cpu_has_vmx_msr_bitmap()) |
2369 | vmx_set_msr_bitmap(&vmx->vcpu); | |
e38aea3e AK |
2370 | } |
2371 | ||
6aa8b732 AK |
2372 | /* |
2373 | * reads and returns guest's timestamp counter "register" | |
be7b263e HZ |
2374 | * guest_tsc = (host_tsc * tsc multiplier) >> 48 + tsc_offset |
2375 | * -- Intel TSC Scaling for Virtualization White Paper, sec 1.3 | |
6aa8b732 | 2376 | */ |
be7b263e | 2377 | static u64 guest_read_tsc(struct kvm_vcpu *vcpu) |
6aa8b732 AK |
2378 | { |
2379 | u64 host_tsc, tsc_offset; | |
2380 | ||
4ea1636b | 2381 | host_tsc = rdtsc(); |
6aa8b732 | 2382 | tsc_offset = vmcs_read64(TSC_OFFSET); |
be7b263e | 2383 | return kvm_scale_tsc(vcpu, host_tsc) + tsc_offset; |
6aa8b732 AK |
2384 | } |
2385 | ||
d5c1785d NHE |
2386 | /* |
2387 | * Like guest_read_tsc, but always returns L1's notion of the timestamp | |
2388 | * counter, even if a nested guest (L2) is currently running. | |
2389 | */ | |
48d89b92 | 2390 | static u64 vmx_read_l1_tsc(struct kvm_vcpu *vcpu, u64 host_tsc) |
d5c1785d | 2391 | { |
886b470c | 2392 | u64 tsc_offset; |
d5c1785d | 2393 | |
d5c1785d NHE |
2394 | tsc_offset = is_guest_mode(vcpu) ? |
2395 | to_vmx(vcpu)->nested.vmcs01_tsc_offset : | |
2396 | vmcs_read64(TSC_OFFSET); | |
2397 | return host_tsc + tsc_offset; | |
2398 | } | |
2399 | ||
ba904635 WA |
2400 | static u64 vmx_read_tsc_offset(struct kvm_vcpu *vcpu) |
2401 | { | |
2402 | return vmcs_read64(TSC_OFFSET); | |
2403 | } | |
2404 | ||
6aa8b732 | 2405 | /* |
99e3e30a | 2406 | * writes 'offset' into guest's timestamp counter offset register |
6aa8b732 | 2407 | */ |
99e3e30a | 2408 | static void vmx_write_tsc_offset(struct kvm_vcpu *vcpu, u64 offset) |
6aa8b732 | 2409 | { |
27fc51b2 | 2410 | if (is_guest_mode(vcpu)) { |
7991825b | 2411 | /* |
27fc51b2 NHE |
2412 | * We're here if L1 chose not to trap WRMSR to TSC. According |
2413 | * to the spec, this should set L1's TSC; The offset that L1 | |
2414 | * set for L2 remains unchanged, and still needs to be added | |
2415 | * to the newly set TSC to get L2's TSC. | |
7991825b | 2416 | */ |
27fc51b2 NHE |
2417 | struct vmcs12 *vmcs12; |
2418 | to_vmx(vcpu)->nested.vmcs01_tsc_offset = offset; | |
2419 | /* recalculate vmcs02.TSC_OFFSET: */ | |
2420 | vmcs12 = get_vmcs12(vcpu); | |
2421 | vmcs_write64(TSC_OFFSET, offset + | |
2422 | (nested_cpu_has(vmcs12, CPU_BASED_USE_TSC_OFFSETING) ? | |
2423 | vmcs12->tsc_offset : 0)); | |
2424 | } else { | |
489223ed YY |
2425 | trace_kvm_write_tsc_offset(vcpu->vcpu_id, |
2426 | vmcs_read64(TSC_OFFSET), offset); | |
27fc51b2 NHE |
2427 | vmcs_write64(TSC_OFFSET, offset); |
2428 | } | |
6aa8b732 AK |
2429 | } |
2430 | ||
58ea6767 | 2431 | static void vmx_adjust_tsc_offset_guest(struct kvm_vcpu *vcpu, s64 adjustment) |
e48672fa ZA |
2432 | { |
2433 | u64 offset = vmcs_read64(TSC_OFFSET); | |
489223ed | 2434 | |
e48672fa | 2435 | vmcs_write64(TSC_OFFSET, offset + adjustment); |
7991825b NHE |
2436 | if (is_guest_mode(vcpu)) { |
2437 | /* Even when running L2, the adjustment needs to apply to L1 */ | |
2438 | to_vmx(vcpu)->nested.vmcs01_tsc_offset += adjustment; | |
489223ed YY |
2439 | } else |
2440 | trace_kvm_write_tsc_offset(vcpu->vcpu_id, offset, | |
2441 | offset + adjustment); | |
e48672fa ZA |
2442 | } |
2443 | ||
801d3424 NHE |
2444 | static bool guest_cpuid_has_vmx(struct kvm_vcpu *vcpu) |
2445 | { | |
2446 | struct kvm_cpuid_entry2 *best = kvm_find_cpuid_entry(vcpu, 1, 0); | |
2447 | return best && (best->ecx & (1 << (X86_FEATURE_VMX & 31))); | |
2448 | } | |
2449 | ||
2450 | /* | |
2451 | * nested_vmx_allowed() checks whether a guest should be allowed to use VMX | |
2452 | * instructions and MSRs (i.e., nested VMX). Nested VMX is disabled for | |
2453 | * all guests if the "nested" module option is off, and can also be disabled | |
2454 | * for a single guest by disabling its VMX cpuid bit. | |
2455 | */ | |
2456 | static inline bool nested_vmx_allowed(struct kvm_vcpu *vcpu) | |
2457 | { | |
2458 | return nested && guest_cpuid_has_vmx(vcpu); | |
2459 | } | |
2460 | ||
b87a51ae NHE |
2461 | /* |
2462 | * nested_vmx_setup_ctls_msrs() sets up variables containing the values to be | |
2463 | * returned for the various VMX controls MSRs when nested VMX is enabled. | |
2464 | * The same values should also be used to verify that vmcs12 control fields are | |
2465 | * valid during nested entry from L1 to L2. | |
2466 | * Each of these control msrs has a low and high 32-bit half: A low bit is on | |
2467 | * if the corresponding bit in the (32-bit) control field *must* be on, and a | |
2468 | * bit in the high half is on if the corresponding bit in the control field | |
2469 | * may be on. See also vmx_control_verify(). | |
b87a51ae | 2470 | */ |
b9c237bb | 2471 | static void nested_vmx_setup_ctls_msrs(struct vcpu_vmx *vmx) |
b87a51ae NHE |
2472 | { |
2473 | /* | |
2474 | * Note that as a general rule, the high half of the MSRs (bits in | |
2475 | * the control fields which may be 1) should be initialized by the | |
2476 | * intersection of the underlying hardware's MSR (i.e., features which | |
2477 | * can be supported) and the list of features we want to expose - | |
2478 | * because they are known to be properly supported in our code. | |
2479 | * Also, usually, the low half of the MSRs (bits which must be 1) can | |
2480 | * be set to 0, meaning that L1 may turn off any of these bits. The | |
2481 | * reason is that if one of these bits is necessary, it will appear | |
2482 | * in vmcs01 and prepare_vmcs02, when it bitwise-or's the control | |
2483 | * fields of vmcs01 and vmcs02, will turn these bits off - and | |
2484 | * nested_vmx_exit_handled() will not pass related exits to L1. | |
2485 | * These rules have exceptions below. | |
2486 | */ | |
2487 | ||
2488 | /* pin-based controls */ | |
eabeaacc | 2489 | rdmsr(MSR_IA32_VMX_PINBASED_CTLS, |
b9c237bb WV |
2490 | vmx->nested.nested_vmx_pinbased_ctls_low, |
2491 | vmx->nested.nested_vmx_pinbased_ctls_high); | |
2492 | vmx->nested.nested_vmx_pinbased_ctls_low |= | |
2493 | PIN_BASED_ALWAYSON_WITHOUT_TRUE_MSR; | |
2494 | vmx->nested.nested_vmx_pinbased_ctls_high &= | |
2495 | PIN_BASED_EXT_INTR_MASK | | |
2496 | PIN_BASED_NMI_EXITING | | |
2497 | PIN_BASED_VIRTUAL_NMIS; | |
2498 | vmx->nested.nested_vmx_pinbased_ctls_high |= | |
2499 | PIN_BASED_ALWAYSON_WITHOUT_TRUE_MSR | | |
0238ea91 | 2500 | PIN_BASED_VMX_PREEMPTION_TIMER; |
35754c98 | 2501 | if (vmx_cpu_uses_apicv(&vmx->vcpu)) |
705699a1 WV |
2502 | vmx->nested.nested_vmx_pinbased_ctls_high |= |
2503 | PIN_BASED_POSTED_INTR; | |
b87a51ae | 2504 | |
3dbcd8da | 2505 | /* exit controls */ |
c0dfee58 | 2506 | rdmsr(MSR_IA32_VMX_EXIT_CTLS, |
b9c237bb WV |
2507 | vmx->nested.nested_vmx_exit_ctls_low, |
2508 | vmx->nested.nested_vmx_exit_ctls_high); | |
2509 | vmx->nested.nested_vmx_exit_ctls_low = | |
2510 | VM_EXIT_ALWAYSON_WITHOUT_TRUE_MSR; | |
e0ba1a6f | 2511 | |
b9c237bb | 2512 | vmx->nested.nested_vmx_exit_ctls_high &= |
b87a51ae | 2513 | #ifdef CONFIG_X86_64 |
c0dfee58 | 2514 | VM_EXIT_HOST_ADDR_SPACE_SIZE | |
b87a51ae | 2515 | #endif |
f4124500 | 2516 | VM_EXIT_LOAD_IA32_PAT | VM_EXIT_SAVE_IA32_PAT; |
b9c237bb WV |
2517 | vmx->nested.nested_vmx_exit_ctls_high |= |
2518 | VM_EXIT_ALWAYSON_WITHOUT_TRUE_MSR | | |
f4124500 | 2519 | VM_EXIT_LOAD_IA32_EFER | VM_EXIT_SAVE_IA32_EFER | |
e0ba1a6f BD |
2520 | VM_EXIT_SAVE_VMX_PREEMPTION_TIMER | VM_EXIT_ACK_INTR_ON_EXIT; |
2521 | ||
36be0b9d | 2522 | if (vmx_mpx_supported()) |
b9c237bb | 2523 | vmx->nested.nested_vmx_exit_ctls_high |= VM_EXIT_CLEAR_BNDCFGS; |
b87a51ae | 2524 | |
2996fca0 | 2525 | /* We support free control of debug control saving. */ |
b9c237bb WV |
2526 | vmx->nested.nested_vmx_true_exit_ctls_low = |
2527 | vmx->nested.nested_vmx_exit_ctls_low & | |
2996fca0 JK |
2528 | ~VM_EXIT_SAVE_DEBUG_CONTROLS; |
2529 | ||
b87a51ae NHE |
2530 | /* entry controls */ |
2531 | rdmsr(MSR_IA32_VMX_ENTRY_CTLS, | |
b9c237bb WV |
2532 | vmx->nested.nested_vmx_entry_ctls_low, |
2533 | vmx->nested.nested_vmx_entry_ctls_high); | |
2534 | vmx->nested.nested_vmx_entry_ctls_low = | |
2535 | VM_ENTRY_ALWAYSON_WITHOUT_TRUE_MSR; | |
2536 | vmx->nested.nested_vmx_entry_ctls_high &= | |
57435349 JK |
2537 | #ifdef CONFIG_X86_64 |
2538 | VM_ENTRY_IA32E_MODE | | |
2539 | #endif | |
2540 | VM_ENTRY_LOAD_IA32_PAT; | |
b9c237bb WV |
2541 | vmx->nested.nested_vmx_entry_ctls_high |= |
2542 | (VM_ENTRY_ALWAYSON_WITHOUT_TRUE_MSR | VM_ENTRY_LOAD_IA32_EFER); | |
36be0b9d | 2543 | if (vmx_mpx_supported()) |
b9c237bb | 2544 | vmx->nested.nested_vmx_entry_ctls_high |= VM_ENTRY_LOAD_BNDCFGS; |
57435349 | 2545 | |
2996fca0 | 2546 | /* We support free control of debug control loading. */ |
b9c237bb WV |
2547 | vmx->nested.nested_vmx_true_entry_ctls_low = |
2548 | vmx->nested.nested_vmx_entry_ctls_low & | |
2996fca0 JK |
2549 | ~VM_ENTRY_LOAD_DEBUG_CONTROLS; |
2550 | ||
b87a51ae NHE |
2551 | /* cpu-based controls */ |
2552 | rdmsr(MSR_IA32_VMX_PROCBASED_CTLS, | |
b9c237bb WV |
2553 | vmx->nested.nested_vmx_procbased_ctls_low, |
2554 | vmx->nested.nested_vmx_procbased_ctls_high); | |
2555 | vmx->nested.nested_vmx_procbased_ctls_low = | |
2556 | CPU_BASED_ALWAYSON_WITHOUT_TRUE_MSR; | |
2557 | vmx->nested.nested_vmx_procbased_ctls_high &= | |
a294c9bb JK |
2558 | CPU_BASED_VIRTUAL_INTR_PENDING | |
2559 | CPU_BASED_VIRTUAL_NMI_PENDING | CPU_BASED_USE_TSC_OFFSETING | | |
b87a51ae NHE |
2560 | CPU_BASED_HLT_EXITING | CPU_BASED_INVLPG_EXITING | |
2561 | CPU_BASED_MWAIT_EXITING | CPU_BASED_CR3_LOAD_EXITING | | |
2562 | CPU_BASED_CR3_STORE_EXITING | | |
2563 | #ifdef CONFIG_X86_64 | |
2564 | CPU_BASED_CR8_LOAD_EXITING | CPU_BASED_CR8_STORE_EXITING | | |
2565 | #endif | |
2566 | CPU_BASED_MOV_DR_EXITING | CPU_BASED_UNCOND_IO_EXITING | | |
5f3d45e7 MD |
2567 | CPU_BASED_USE_IO_BITMAPS | CPU_BASED_MONITOR_TRAP_FLAG | |
2568 | CPU_BASED_MONITOR_EXITING | CPU_BASED_RDPMC_EXITING | | |
2569 | CPU_BASED_RDTSC_EXITING | CPU_BASED_PAUSE_EXITING | | |
2570 | CPU_BASED_TPR_SHADOW | CPU_BASED_ACTIVATE_SECONDARY_CONTROLS; | |
b87a51ae NHE |
2571 | /* |
2572 | * We can allow some features even when not supported by the | |
2573 | * hardware. For example, L1 can specify an MSR bitmap - and we | |
2574 | * can use it to avoid exits to L1 - even when L0 runs L2 | |
2575 | * without MSR bitmaps. | |
2576 | */ | |
b9c237bb WV |
2577 | vmx->nested.nested_vmx_procbased_ctls_high |= |
2578 | CPU_BASED_ALWAYSON_WITHOUT_TRUE_MSR | | |
560b7ee1 | 2579 | CPU_BASED_USE_MSR_BITMAPS; |
b87a51ae | 2580 | |
3dcdf3ec | 2581 | /* We support free control of CR3 access interception. */ |
b9c237bb WV |
2582 | vmx->nested.nested_vmx_true_procbased_ctls_low = |
2583 | vmx->nested.nested_vmx_procbased_ctls_low & | |
3dcdf3ec JK |
2584 | ~(CPU_BASED_CR3_LOAD_EXITING | CPU_BASED_CR3_STORE_EXITING); |
2585 | ||
b87a51ae NHE |
2586 | /* secondary cpu-based controls */ |
2587 | rdmsr(MSR_IA32_VMX_PROCBASED_CTLS2, | |
b9c237bb WV |
2588 | vmx->nested.nested_vmx_secondary_ctls_low, |
2589 | vmx->nested.nested_vmx_secondary_ctls_high); | |
2590 | vmx->nested.nested_vmx_secondary_ctls_low = 0; | |
2591 | vmx->nested.nested_vmx_secondary_ctls_high &= | |
d6851fbe | 2592 | SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES | |
b3a2a907 | 2593 | SECONDARY_EXEC_RDTSCP | |
f2b93280 | 2594 | SECONDARY_EXEC_VIRTUALIZE_X2APIC_MODE | |
5c614b35 | 2595 | SECONDARY_EXEC_ENABLE_VPID | |
82f0dd4b | 2596 | SECONDARY_EXEC_APIC_REGISTER_VIRT | |
608406e2 | 2597 | SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY | |
81dc01f7 | 2598 | SECONDARY_EXEC_WBINVD_EXITING | |
8b3e34e4 XG |
2599 | SECONDARY_EXEC_XSAVES | |
2600 | SECONDARY_EXEC_PCOMMIT; | |
c18911a2 | 2601 | |
afa61f75 NHE |
2602 | if (enable_ept) { |
2603 | /* nested EPT: emulate EPT also to L1 */ | |
b9c237bb | 2604 | vmx->nested.nested_vmx_secondary_ctls_high |= |
0790ec17 | 2605 | SECONDARY_EXEC_ENABLE_EPT; |
b9c237bb | 2606 | vmx->nested.nested_vmx_ept_caps = VMX_EPT_PAGE_WALK_4_BIT | |
d3134dbf JK |
2607 | VMX_EPTP_WB_BIT | VMX_EPT_2MB_PAGE_BIT | |
2608 | VMX_EPT_INVEPT_BIT; | |
b9c237bb | 2609 | vmx->nested.nested_vmx_ept_caps &= vmx_capability.ept; |
afa61f75 | 2610 | /* |
4b855078 BD |
2611 | * For nested guests, we don't do anything specific |
2612 | * for single context invalidation. Hence, only advertise | |
2613 | * support for global context invalidation. | |
afa61f75 | 2614 | */ |
b9c237bb | 2615 | vmx->nested.nested_vmx_ept_caps |= VMX_EPT_EXTENT_GLOBAL_BIT; |
afa61f75 | 2616 | } else |
b9c237bb | 2617 | vmx->nested.nested_vmx_ept_caps = 0; |
afa61f75 | 2618 | |
089d7b6e WL |
2619 | if (enable_vpid) |
2620 | vmx->nested.nested_vmx_vpid_caps = VMX_VPID_INVVPID_BIT | | |
2621 | VMX_VPID_EXTENT_GLOBAL_CONTEXT_BIT; | |
2622 | else | |
2623 | vmx->nested.nested_vmx_vpid_caps = 0; | |
99b83ac8 | 2624 | |
0790ec17 RK |
2625 | if (enable_unrestricted_guest) |
2626 | vmx->nested.nested_vmx_secondary_ctls_high |= | |
2627 | SECONDARY_EXEC_UNRESTRICTED_GUEST; | |
2628 | ||
c18911a2 | 2629 | /* miscellaneous data */ |
b9c237bb WV |
2630 | rdmsr(MSR_IA32_VMX_MISC, |
2631 | vmx->nested.nested_vmx_misc_low, | |
2632 | vmx->nested.nested_vmx_misc_high); | |
2633 | vmx->nested.nested_vmx_misc_low &= VMX_MISC_SAVE_EFER_LMA; | |
2634 | vmx->nested.nested_vmx_misc_low |= | |
2635 | VMX_MISC_EMULATED_PREEMPTION_TIMER_RATE | | |
f4124500 | 2636 | VMX_MISC_ACTIVITY_HLT; |
b9c237bb | 2637 | vmx->nested.nested_vmx_misc_high = 0; |
b87a51ae NHE |
2638 | } |
2639 | ||
2640 | static inline bool vmx_control_verify(u32 control, u32 low, u32 high) | |
2641 | { | |
2642 | /* | |
2643 | * Bits 0 in high must be 0, and bits 1 in low must be 1. | |
2644 | */ | |
2645 | return ((control & high) | low) == control; | |
2646 | } | |
2647 | ||
2648 | static inline u64 vmx_control_msr(u32 low, u32 high) | |
2649 | { | |
2650 | return low | ((u64)high << 32); | |
2651 | } | |
2652 | ||
cae50139 | 2653 | /* Returns 0 on success, non-0 otherwise. */ |
b87a51ae NHE |
2654 | static int vmx_get_vmx_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata) |
2655 | { | |
b9c237bb WV |
2656 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
2657 | ||
b87a51ae | 2658 | switch (msr_index) { |
b87a51ae NHE |
2659 | case MSR_IA32_VMX_BASIC: |
2660 | /* | |
2661 | * This MSR reports some information about VMX support. We | |
2662 | * should return information about the VMX we emulate for the | |
2663 | * guest, and the VMCS structure we give it - not about the | |
2664 | * VMX support of the underlying hardware. | |
2665 | */ | |
3dbcd8da | 2666 | *pdata = VMCS12_REVISION | VMX_BASIC_TRUE_CTLS | |
b87a51ae NHE |
2667 | ((u64)VMCS12_SIZE << VMX_BASIC_VMCS_SIZE_SHIFT) | |
2668 | (VMX_BASIC_MEM_TYPE_WB << VMX_BASIC_MEM_TYPE_SHIFT); | |
2669 | break; | |
2670 | case MSR_IA32_VMX_TRUE_PINBASED_CTLS: | |
2671 | case MSR_IA32_VMX_PINBASED_CTLS: | |
b9c237bb WV |
2672 | *pdata = vmx_control_msr( |
2673 | vmx->nested.nested_vmx_pinbased_ctls_low, | |
2674 | vmx->nested.nested_vmx_pinbased_ctls_high); | |
b87a51ae NHE |
2675 | break; |
2676 | case MSR_IA32_VMX_TRUE_PROCBASED_CTLS: | |
b9c237bb WV |
2677 | *pdata = vmx_control_msr( |
2678 | vmx->nested.nested_vmx_true_procbased_ctls_low, | |
2679 | vmx->nested.nested_vmx_procbased_ctls_high); | |
3dcdf3ec | 2680 | break; |
b87a51ae | 2681 | case MSR_IA32_VMX_PROCBASED_CTLS: |
b9c237bb WV |
2682 | *pdata = vmx_control_msr( |
2683 | vmx->nested.nested_vmx_procbased_ctls_low, | |
2684 | vmx->nested.nested_vmx_procbased_ctls_high); | |
b87a51ae NHE |
2685 | break; |
2686 | case MSR_IA32_VMX_TRUE_EXIT_CTLS: | |
b9c237bb WV |
2687 | *pdata = vmx_control_msr( |
2688 | vmx->nested.nested_vmx_true_exit_ctls_low, | |
2689 | vmx->nested.nested_vmx_exit_ctls_high); | |
2996fca0 | 2690 | break; |
b87a51ae | 2691 | case MSR_IA32_VMX_EXIT_CTLS: |
b9c237bb WV |
2692 | *pdata = vmx_control_msr( |
2693 | vmx->nested.nested_vmx_exit_ctls_low, | |
2694 | vmx->nested.nested_vmx_exit_ctls_high); | |
b87a51ae NHE |
2695 | break; |
2696 | case MSR_IA32_VMX_TRUE_ENTRY_CTLS: | |
b9c237bb WV |
2697 | *pdata = vmx_control_msr( |
2698 | vmx->nested.nested_vmx_true_entry_ctls_low, | |
2699 | vmx->nested.nested_vmx_entry_ctls_high); | |
2996fca0 | 2700 | break; |
b87a51ae | 2701 | case MSR_IA32_VMX_ENTRY_CTLS: |
b9c237bb WV |
2702 | *pdata = vmx_control_msr( |
2703 | vmx->nested.nested_vmx_entry_ctls_low, | |
2704 | vmx->nested.nested_vmx_entry_ctls_high); | |
b87a51ae NHE |
2705 | break; |
2706 | case MSR_IA32_VMX_MISC: | |
b9c237bb WV |
2707 | *pdata = vmx_control_msr( |
2708 | vmx->nested.nested_vmx_misc_low, | |
2709 | vmx->nested.nested_vmx_misc_high); | |
b87a51ae NHE |
2710 | break; |
2711 | /* | |
2712 | * These MSRs specify bits which the guest must keep fixed (on or off) | |
2713 | * while L1 is in VMXON mode (in L1's root mode, or running an L2). | |
2714 | * We picked the standard core2 setting. | |
2715 | */ | |
2716 | #define VMXON_CR0_ALWAYSON (X86_CR0_PE | X86_CR0_PG | X86_CR0_NE) | |
2717 | #define VMXON_CR4_ALWAYSON X86_CR4_VMXE | |
2718 | case MSR_IA32_VMX_CR0_FIXED0: | |
2719 | *pdata = VMXON_CR0_ALWAYSON; | |
2720 | break; | |
2721 | case MSR_IA32_VMX_CR0_FIXED1: | |
2722 | *pdata = -1ULL; | |
2723 | break; | |
2724 | case MSR_IA32_VMX_CR4_FIXED0: | |
2725 | *pdata = VMXON_CR4_ALWAYSON; | |
2726 | break; | |
2727 | case MSR_IA32_VMX_CR4_FIXED1: | |
2728 | *pdata = -1ULL; | |
2729 | break; | |
2730 | case MSR_IA32_VMX_VMCS_ENUM: | |
5381417f | 2731 | *pdata = 0x2e; /* highest index: VMX_PREEMPTION_TIMER_VALUE */ |
b87a51ae NHE |
2732 | break; |
2733 | case MSR_IA32_VMX_PROCBASED_CTLS2: | |
b9c237bb WV |
2734 | *pdata = vmx_control_msr( |
2735 | vmx->nested.nested_vmx_secondary_ctls_low, | |
2736 | vmx->nested.nested_vmx_secondary_ctls_high); | |
b87a51ae NHE |
2737 | break; |
2738 | case MSR_IA32_VMX_EPT_VPID_CAP: | |
afa61f75 | 2739 | /* Currently, no nested vpid support */ |
089d7b6e WL |
2740 | *pdata = vmx->nested.nested_vmx_ept_caps | |
2741 | ((u64)vmx->nested.nested_vmx_vpid_caps << 32); | |
b87a51ae NHE |
2742 | break; |
2743 | default: | |
b87a51ae | 2744 | return 1; |
b3897a49 NHE |
2745 | } |
2746 | ||
b87a51ae NHE |
2747 | return 0; |
2748 | } | |
2749 | ||
6aa8b732 AK |
2750 | /* |
2751 | * Reads an msr value (of 'msr_index') into 'pdata'. | |
2752 | * Returns 0 on success, non-0 otherwise. | |
2753 | * Assumes vcpu_load() was already called. | |
2754 | */ | |
609e36d3 | 2755 | static int vmx_get_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info) |
6aa8b732 | 2756 | { |
26bb0981 | 2757 | struct shared_msr_entry *msr; |
6aa8b732 | 2758 | |
609e36d3 | 2759 | switch (msr_info->index) { |
05b3e0c2 | 2760 | #ifdef CONFIG_X86_64 |
6aa8b732 | 2761 | case MSR_FS_BASE: |
609e36d3 | 2762 | msr_info->data = vmcs_readl(GUEST_FS_BASE); |
6aa8b732 AK |
2763 | break; |
2764 | case MSR_GS_BASE: | |
609e36d3 | 2765 | msr_info->data = vmcs_readl(GUEST_GS_BASE); |
6aa8b732 | 2766 | break; |
44ea2b17 AK |
2767 | case MSR_KERNEL_GS_BASE: |
2768 | vmx_load_host_state(to_vmx(vcpu)); | |
609e36d3 | 2769 | msr_info->data = to_vmx(vcpu)->msr_guest_kernel_gs_base; |
44ea2b17 | 2770 | break; |
26bb0981 | 2771 | #endif |
6aa8b732 | 2772 | case MSR_EFER: |
609e36d3 | 2773 | return kvm_get_msr_common(vcpu, msr_info); |
af24a4e4 | 2774 | case MSR_IA32_TSC: |
be7b263e | 2775 | msr_info->data = guest_read_tsc(vcpu); |
6aa8b732 AK |
2776 | break; |
2777 | case MSR_IA32_SYSENTER_CS: | |
609e36d3 | 2778 | msr_info->data = vmcs_read32(GUEST_SYSENTER_CS); |
6aa8b732 AK |
2779 | break; |
2780 | case MSR_IA32_SYSENTER_EIP: | |
609e36d3 | 2781 | msr_info->data = vmcs_readl(GUEST_SYSENTER_EIP); |
6aa8b732 AK |
2782 | break; |
2783 | case MSR_IA32_SYSENTER_ESP: | |
609e36d3 | 2784 | msr_info->data = vmcs_readl(GUEST_SYSENTER_ESP); |
6aa8b732 | 2785 | break; |
0dd376e7 | 2786 | case MSR_IA32_BNDCFGS: |
93c4adc7 PB |
2787 | if (!vmx_mpx_supported()) |
2788 | return 1; | |
609e36d3 | 2789 | msr_info->data = vmcs_read64(GUEST_BNDCFGS); |
0dd376e7 | 2790 | break; |
cae50139 JK |
2791 | case MSR_IA32_FEATURE_CONTROL: |
2792 | if (!nested_vmx_allowed(vcpu)) | |
2793 | return 1; | |
609e36d3 | 2794 | msr_info->data = to_vmx(vcpu)->nested.msr_ia32_feature_control; |
cae50139 JK |
2795 | break; |
2796 | case MSR_IA32_VMX_BASIC ... MSR_IA32_VMX_VMFUNC: | |
2797 | if (!nested_vmx_allowed(vcpu)) | |
2798 | return 1; | |
609e36d3 | 2799 | return vmx_get_vmx_msr(vcpu, msr_info->index, &msr_info->data); |
20300099 WL |
2800 | case MSR_IA32_XSS: |
2801 | if (!vmx_xsaves_supported()) | |
2802 | return 1; | |
609e36d3 | 2803 | msr_info->data = vcpu->arch.ia32_xss; |
20300099 | 2804 | break; |
4e47c7a6 | 2805 | case MSR_TSC_AUX: |
1cea0ce6 | 2806 | if (!guest_cpuid_has_rdtscp(vcpu)) |
4e47c7a6 SY |
2807 | return 1; |
2808 | /* Otherwise falls through */ | |
6aa8b732 | 2809 | default: |
609e36d3 | 2810 | msr = find_msr_entry(to_vmx(vcpu), msr_info->index); |
3bab1f5d | 2811 | if (msr) { |
609e36d3 | 2812 | msr_info->data = msr->data; |
3bab1f5d | 2813 | break; |
6aa8b732 | 2814 | } |
609e36d3 | 2815 | return kvm_get_msr_common(vcpu, msr_info); |
6aa8b732 AK |
2816 | } |
2817 | ||
6aa8b732 AK |
2818 | return 0; |
2819 | } | |
2820 | ||
cae50139 JK |
2821 | static void vmx_leave_nested(struct kvm_vcpu *vcpu); |
2822 | ||
6aa8b732 AK |
2823 | /* |
2824 | * Writes msr value into into the appropriate "register". | |
2825 | * Returns 0 on success, non-0 otherwise. | |
2826 | * Assumes vcpu_load() was already called. | |
2827 | */ | |
8fe8ab46 | 2828 | static int vmx_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info) |
6aa8b732 | 2829 | { |
a2fa3e9f | 2830 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
26bb0981 | 2831 | struct shared_msr_entry *msr; |
2cc51560 | 2832 | int ret = 0; |
8fe8ab46 WA |
2833 | u32 msr_index = msr_info->index; |
2834 | u64 data = msr_info->data; | |
2cc51560 | 2835 | |
6aa8b732 | 2836 | switch (msr_index) { |
3bab1f5d | 2837 | case MSR_EFER: |
8fe8ab46 | 2838 | ret = kvm_set_msr_common(vcpu, msr_info); |
2cc51560 | 2839 | break; |
16175a79 | 2840 | #ifdef CONFIG_X86_64 |
6aa8b732 | 2841 | case MSR_FS_BASE: |
2fb92db1 | 2842 | vmx_segment_cache_clear(vmx); |
6aa8b732 AK |
2843 | vmcs_writel(GUEST_FS_BASE, data); |
2844 | break; | |
2845 | case MSR_GS_BASE: | |
2fb92db1 | 2846 | vmx_segment_cache_clear(vmx); |
6aa8b732 AK |
2847 | vmcs_writel(GUEST_GS_BASE, data); |
2848 | break; | |
44ea2b17 AK |
2849 | case MSR_KERNEL_GS_BASE: |
2850 | vmx_load_host_state(vmx); | |
2851 | vmx->msr_guest_kernel_gs_base = data; | |
2852 | break; | |
6aa8b732 AK |
2853 | #endif |
2854 | case MSR_IA32_SYSENTER_CS: | |
2855 | vmcs_write32(GUEST_SYSENTER_CS, data); | |
2856 | break; | |
2857 | case MSR_IA32_SYSENTER_EIP: | |
f5b42c33 | 2858 | vmcs_writel(GUEST_SYSENTER_EIP, data); |
6aa8b732 AK |
2859 | break; |
2860 | case MSR_IA32_SYSENTER_ESP: | |
f5b42c33 | 2861 | vmcs_writel(GUEST_SYSENTER_ESP, data); |
6aa8b732 | 2862 | break; |
0dd376e7 | 2863 | case MSR_IA32_BNDCFGS: |
93c4adc7 PB |
2864 | if (!vmx_mpx_supported()) |
2865 | return 1; | |
0dd376e7 LJ |
2866 | vmcs_write64(GUEST_BNDCFGS, data); |
2867 | break; | |
af24a4e4 | 2868 | case MSR_IA32_TSC: |
8fe8ab46 | 2869 | kvm_write_tsc(vcpu, msr_info); |
6aa8b732 | 2870 | break; |
468d472f SY |
2871 | case MSR_IA32_CR_PAT: |
2872 | if (vmcs_config.vmentry_ctrl & VM_ENTRY_LOAD_IA32_PAT) { | |
4566654b NA |
2873 | if (!kvm_mtrr_valid(vcpu, MSR_IA32_CR_PAT, data)) |
2874 | return 1; | |
468d472f SY |
2875 | vmcs_write64(GUEST_IA32_PAT, data); |
2876 | vcpu->arch.pat = data; | |
2877 | break; | |
2878 | } | |
8fe8ab46 | 2879 | ret = kvm_set_msr_common(vcpu, msr_info); |
4e47c7a6 | 2880 | break; |
ba904635 WA |
2881 | case MSR_IA32_TSC_ADJUST: |
2882 | ret = kvm_set_msr_common(vcpu, msr_info); | |
4e47c7a6 | 2883 | break; |
cae50139 JK |
2884 | case MSR_IA32_FEATURE_CONTROL: |
2885 | if (!nested_vmx_allowed(vcpu) || | |
2886 | (to_vmx(vcpu)->nested.msr_ia32_feature_control & | |
2887 | FEATURE_CONTROL_LOCKED && !msr_info->host_initiated)) | |
2888 | return 1; | |
2889 | vmx->nested.msr_ia32_feature_control = data; | |
2890 | if (msr_info->host_initiated && data == 0) | |
2891 | vmx_leave_nested(vcpu); | |
2892 | break; | |
2893 | case MSR_IA32_VMX_BASIC ... MSR_IA32_VMX_VMFUNC: | |
2894 | return 1; /* they are read-only */ | |
20300099 WL |
2895 | case MSR_IA32_XSS: |
2896 | if (!vmx_xsaves_supported()) | |
2897 | return 1; | |
2898 | /* | |
2899 | * The only supported bit as of Skylake is bit 8, but | |
2900 | * it is not supported on KVM. | |
2901 | */ | |
2902 | if (data != 0) | |
2903 | return 1; | |
2904 | vcpu->arch.ia32_xss = data; | |
2905 | if (vcpu->arch.ia32_xss != host_xss) | |
2906 | add_atomic_switch_msr(vmx, MSR_IA32_XSS, | |
2907 | vcpu->arch.ia32_xss, host_xss); | |
2908 | else | |
2909 | clear_atomic_switch_msr(vmx, MSR_IA32_XSS); | |
2910 | break; | |
4e47c7a6 | 2911 | case MSR_TSC_AUX: |
1cea0ce6 | 2912 | if (!guest_cpuid_has_rdtscp(vcpu)) |
4e47c7a6 SY |
2913 | return 1; |
2914 | /* Check reserved bit, higher 32 bits should be zero */ | |
2915 | if ((data >> 32) != 0) | |
2916 | return 1; | |
2917 | /* Otherwise falls through */ | |
6aa8b732 | 2918 | default: |
8b9cf98c | 2919 | msr = find_msr_entry(vmx, msr_index); |
3bab1f5d | 2920 | if (msr) { |
8b3c3104 | 2921 | u64 old_msr_data = msr->data; |
3bab1f5d | 2922 | msr->data = data; |
2225fd56 AK |
2923 | if (msr - vmx->guest_msrs < vmx->save_nmsrs) { |
2924 | preempt_disable(); | |
8b3c3104 AH |
2925 | ret = kvm_set_shared_msr(msr->index, msr->data, |
2926 | msr->mask); | |
2225fd56 | 2927 | preempt_enable(); |
8b3c3104 AH |
2928 | if (ret) |
2929 | msr->data = old_msr_data; | |
2225fd56 | 2930 | } |
3bab1f5d | 2931 | break; |
6aa8b732 | 2932 | } |
8fe8ab46 | 2933 | ret = kvm_set_msr_common(vcpu, msr_info); |
6aa8b732 AK |
2934 | } |
2935 | ||
2cc51560 | 2936 | return ret; |
6aa8b732 AK |
2937 | } |
2938 | ||
5fdbf976 | 2939 | static void vmx_cache_reg(struct kvm_vcpu *vcpu, enum kvm_reg reg) |
6aa8b732 | 2940 | { |
5fdbf976 MT |
2941 | __set_bit(reg, (unsigned long *)&vcpu->arch.regs_avail); |
2942 | switch (reg) { | |
2943 | case VCPU_REGS_RSP: | |
2944 | vcpu->arch.regs[VCPU_REGS_RSP] = vmcs_readl(GUEST_RSP); | |
2945 | break; | |
2946 | case VCPU_REGS_RIP: | |
2947 | vcpu->arch.regs[VCPU_REGS_RIP] = vmcs_readl(GUEST_RIP); | |
2948 | break; | |
6de4f3ad AK |
2949 | case VCPU_EXREG_PDPTR: |
2950 | if (enable_ept) | |
2951 | ept_save_pdptrs(vcpu); | |
2952 | break; | |
5fdbf976 MT |
2953 | default: |
2954 | break; | |
2955 | } | |
6aa8b732 AK |
2956 | } |
2957 | ||
6aa8b732 AK |
2958 | static __init int cpu_has_kvm_support(void) |
2959 | { | |
6210e37b | 2960 | return cpu_has_vmx(); |
6aa8b732 AK |
2961 | } |
2962 | ||
2963 | static __init int vmx_disabled_by_bios(void) | |
2964 | { | |
2965 | u64 msr; | |
2966 | ||
2967 | rdmsrl(MSR_IA32_FEATURE_CONTROL, msr); | |
cafd6659 | 2968 | if (msr & FEATURE_CONTROL_LOCKED) { |
23f3e991 | 2969 | /* launched w/ TXT and VMX disabled */ |
cafd6659 SW |
2970 | if (!(msr & FEATURE_CONTROL_VMXON_ENABLED_INSIDE_SMX) |
2971 | && tboot_enabled()) | |
2972 | return 1; | |
23f3e991 | 2973 | /* launched w/o TXT and VMX only enabled w/ TXT */ |
cafd6659 | 2974 | if (!(msr & FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX) |
23f3e991 | 2975 | && (msr & FEATURE_CONTROL_VMXON_ENABLED_INSIDE_SMX) |
f9335afe SW |
2976 | && !tboot_enabled()) { |
2977 | printk(KERN_WARNING "kvm: disable TXT in the BIOS or " | |
23f3e991 | 2978 | "activate TXT before enabling KVM\n"); |
cafd6659 | 2979 | return 1; |
f9335afe | 2980 | } |
23f3e991 JC |
2981 | /* launched w/o TXT and VMX disabled */ |
2982 | if (!(msr & FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX) | |
2983 | && !tboot_enabled()) | |
2984 | return 1; | |
cafd6659 SW |
2985 | } |
2986 | ||
2987 | return 0; | |
6aa8b732 AK |
2988 | } |
2989 | ||
7725b894 DX |
2990 | static void kvm_cpu_vmxon(u64 addr) |
2991 | { | |
2992 | asm volatile (ASM_VMX_VMXON_RAX | |
2993 | : : "a"(&addr), "m"(addr) | |
2994 | : "memory", "cc"); | |
2995 | } | |
2996 | ||
13a34e06 | 2997 | static int hardware_enable(void) |
6aa8b732 AK |
2998 | { |
2999 | int cpu = raw_smp_processor_id(); | |
3000 | u64 phys_addr = __pa(per_cpu(vmxarea, cpu)); | |
cafd6659 | 3001 | u64 old, test_bits; |
6aa8b732 | 3002 | |
1e02ce4c | 3003 | if (cr4_read_shadow() & X86_CR4_VMXE) |
10474ae8 AG |
3004 | return -EBUSY; |
3005 | ||
d462b819 | 3006 | INIT_LIST_HEAD(&per_cpu(loaded_vmcss_on_cpu, cpu)); |
bf9f6ac8 FW |
3007 | INIT_LIST_HEAD(&per_cpu(blocked_vcpu_on_cpu, cpu)); |
3008 | spin_lock_init(&per_cpu(blocked_vcpu_on_cpu_lock, cpu)); | |
8f536b76 ZY |
3009 | |
3010 | /* | |
3011 | * Now we can enable the vmclear operation in kdump | |
3012 | * since the loaded_vmcss_on_cpu list on this cpu | |
3013 | * has been initialized. | |
3014 | * | |
3015 | * Though the cpu is not in VMX operation now, there | |
3016 | * is no problem to enable the vmclear operation | |
3017 | * for the loaded_vmcss_on_cpu list is empty! | |
3018 | */ | |
3019 | crash_enable_local_vmclear(cpu); | |
3020 | ||
6aa8b732 | 3021 | rdmsrl(MSR_IA32_FEATURE_CONTROL, old); |
cafd6659 SW |
3022 | |
3023 | test_bits = FEATURE_CONTROL_LOCKED; | |
3024 | test_bits |= FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX; | |
3025 | if (tboot_enabled()) | |
3026 | test_bits |= FEATURE_CONTROL_VMXON_ENABLED_INSIDE_SMX; | |
3027 | ||
3028 | if ((old & test_bits) != test_bits) { | |
6aa8b732 | 3029 | /* enable and lock */ |
cafd6659 SW |
3030 | wrmsrl(MSR_IA32_FEATURE_CONTROL, old | test_bits); |
3031 | } | |
375074cc | 3032 | cr4_set_bits(X86_CR4_VMXE); |
10474ae8 | 3033 | |
4610c9cc DX |
3034 | if (vmm_exclusive) { |
3035 | kvm_cpu_vmxon(phys_addr); | |
3036 | ept_sync_global(); | |
3037 | } | |
10474ae8 | 3038 | |
89cbc767 | 3039 | native_store_gdt(this_cpu_ptr(&host_gdt)); |
3444d7da | 3040 | |
10474ae8 | 3041 | return 0; |
6aa8b732 AK |
3042 | } |
3043 | ||
d462b819 | 3044 | static void vmclear_local_loaded_vmcss(void) |
543e4243 AK |
3045 | { |
3046 | int cpu = raw_smp_processor_id(); | |
d462b819 | 3047 | struct loaded_vmcs *v, *n; |
543e4243 | 3048 | |
d462b819 NHE |
3049 | list_for_each_entry_safe(v, n, &per_cpu(loaded_vmcss_on_cpu, cpu), |
3050 | loaded_vmcss_on_cpu_link) | |
3051 | __loaded_vmcs_clear(v); | |
543e4243 AK |
3052 | } |
3053 | ||
710ff4a8 EH |
3054 | |
3055 | /* Just like cpu_vmxoff(), but with the __kvm_handle_fault_on_reboot() | |
3056 | * tricks. | |
3057 | */ | |
3058 | static void kvm_cpu_vmxoff(void) | |
6aa8b732 | 3059 | { |
4ecac3fd | 3060 | asm volatile (__ex(ASM_VMX_VMXOFF) : : : "cc"); |
6aa8b732 AK |
3061 | } |
3062 | ||
13a34e06 | 3063 | static void hardware_disable(void) |
710ff4a8 | 3064 | { |
4610c9cc | 3065 | if (vmm_exclusive) { |
d462b819 | 3066 | vmclear_local_loaded_vmcss(); |
4610c9cc DX |
3067 | kvm_cpu_vmxoff(); |
3068 | } | |
375074cc | 3069 | cr4_clear_bits(X86_CR4_VMXE); |
710ff4a8 EH |
3070 | } |
3071 | ||
1c3d14fe | 3072 | static __init int adjust_vmx_controls(u32 ctl_min, u32 ctl_opt, |
d77c26fc | 3073 | u32 msr, u32 *result) |
1c3d14fe YS |
3074 | { |
3075 | u32 vmx_msr_low, vmx_msr_high; | |
3076 | u32 ctl = ctl_min | ctl_opt; | |
3077 | ||
3078 | rdmsr(msr, vmx_msr_low, vmx_msr_high); | |
3079 | ||
3080 | ctl &= vmx_msr_high; /* bit == 0 in high word ==> must be zero */ | |
3081 | ctl |= vmx_msr_low; /* bit == 1 in low word ==> must be one */ | |
3082 | ||
3083 | /* Ensure minimum (required) set of control bits are supported. */ | |
3084 | if (ctl_min & ~ctl) | |
002c7f7c | 3085 | return -EIO; |
1c3d14fe YS |
3086 | |
3087 | *result = ctl; | |
3088 | return 0; | |
3089 | } | |
3090 | ||
110312c8 AK |
3091 | static __init bool allow_1_setting(u32 msr, u32 ctl) |
3092 | { | |
3093 | u32 vmx_msr_low, vmx_msr_high; | |
3094 | ||
3095 | rdmsr(msr, vmx_msr_low, vmx_msr_high); | |
3096 | return vmx_msr_high & ctl; | |
3097 | } | |
3098 | ||
002c7f7c | 3099 | static __init int setup_vmcs_config(struct vmcs_config *vmcs_conf) |
6aa8b732 AK |
3100 | { |
3101 | u32 vmx_msr_low, vmx_msr_high; | |
d56f546d | 3102 | u32 min, opt, min2, opt2; |
1c3d14fe YS |
3103 | u32 _pin_based_exec_control = 0; |
3104 | u32 _cpu_based_exec_control = 0; | |
f78e0e2e | 3105 | u32 _cpu_based_2nd_exec_control = 0; |
1c3d14fe YS |
3106 | u32 _vmexit_control = 0; |
3107 | u32 _vmentry_control = 0; | |
3108 | ||
10166744 | 3109 | min = CPU_BASED_HLT_EXITING | |
1c3d14fe YS |
3110 | #ifdef CONFIG_X86_64 |
3111 | CPU_BASED_CR8_LOAD_EXITING | | |
3112 | CPU_BASED_CR8_STORE_EXITING | | |
3113 | #endif | |
d56f546d SY |
3114 | CPU_BASED_CR3_LOAD_EXITING | |
3115 | CPU_BASED_CR3_STORE_EXITING | | |
1c3d14fe YS |
3116 | CPU_BASED_USE_IO_BITMAPS | |
3117 | CPU_BASED_MOV_DR_EXITING | | |
a7052897 | 3118 | CPU_BASED_USE_TSC_OFFSETING | |
59708670 SY |
3119 | CPU_BASED_MWAIT_EXITING | |
3120 | CPU_BASED_MONITOR_EXITING | | |
fee84b07 AK |
3121 | CPU_BASED_INVLPG_EXITING | |
3122 | CPU_BASED_RDPMC_EXITING; | |
443381a8 | 3123 | |
f78e0e2e | 3124 | opt = CPU_BASED_TPR_SHADOW | |
25c5f225 | 3125 | CPU_BASED_USE_MSR_BITMAPS | |
f78e0e2e | 3126 | CPU_BASED_ACTIVATE_SECONDARY_CONTROLS; |
1c3d14fe YS |
3127 | if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_PROCBASED_CTLS, |
3128 | &_cpu_based_exec_control) < 0) | |
002c7f7c | 3129 | return -EIO; |
6e5d865c YS |
3130 | #ifdef CONFIG_X86_64 |
3131 | if ((_cpu_based_exec_control & CPU_BASED_TPR_SHADOW)) | |
3132 | _cpu_based_exec_control &= ~CPU_BASED_CR8_LOAD_EXITING & | |
3133 | ~CPU_BASED_CR8_STORE_EXITING; | |
3134 | #endif | |
f78e0e2e | 3135 | if (_cpu_based_exec_control & CPU_BASED_ACTIVATE_SECONDARY_CONTROLS) { |
d56f546d SY |
3136 | min2 = 0; |
3137 | opt2 = SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES | | |
8d14695f | 3138 | SECONDARY_EXEC_VIRTUALIZE_X2APIC_MODE | |
2384d2b3 | 3139 | SECONDARY_EXEC_WBINVD_EXITING | |
d56f546d | 3140 | SECONDARY_EXEC_ENABLE_VPID | |
3a624e29 | 3141 | SECONDARY_EXEC_ENABLE_EPT | |
4b8d54f9 | 3142 | SECONDARY_EXEC_UNRESTRICTED_GUEST | |
4e47c7a6 | 3143 | SECONDARY_EXEC_PAUSE_LOOP_EXITING | |
ad756a16 | 3144 | SECONDARY_EXEC_RDTSCP | |
83d4c286 | 3145 | SECONDARY_EXEC_ENABLE_INVPCID | |
c7c9c56c | 3146 | SECONDARY_EXEC_APIC_REGISTER_VIRT | |
abc4fc58 | 3147 | SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY | |
20300099 | 3148 | SECONDARY_EXEC_SHADOW_VMCS | |
843e4330 | 3149 | SECONDARY_EXEC_XSAVES | |
8b3e34e4 | 3150 | SECONDARY_EXEC_ENABLE_PML | |
64903d61 HZ |
3151 | SECONDARY_EXEC_PCOMMIT | |
3152 | SECONDARY_EXEC_TSC_SCALING; | |
d56f546d SY |
3153 | if (adjust_vmx_controls(min2, opt2, |
3154 | MSR_IA32_VMX_PROCBASED_CTLS2, | |
f78e0e2e SY |
3155 | &_cpu_based_2nd_exec_control) < 0) |
3156 | return -EIO; | |
3157 | } | |
3158 | #ifndef CONFIG_X86_64 | |
3159 | if (!(_cpu_based_2nd_exec_control & | |
3160 | SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES)) | |
3161 | _cpu_based_exec_control &= ~CPU_BASED_TPR_SHADOW; | |
3162 | #endif | |
83d4c286 YZ |
3163 | |
3164 | if (!(_cpu_based_exec_control & CPU_BASED_TPR_SHADOW)) | |
3165 | _cpu_based_2nd_exec_control &= ~( | |
8d14695f | 3166 | SECONDARY_EXEC_APIC_REGISTER_VIRT | |
c7c9c56c YZ |
3167 | SECONDARY_EXEC_VIRTUALIZE_X2APIC_MODE | |
3168 | SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY); | |
83d4c286 | 3169 | |
d56f546d | 3170 | if (_cpu_based_2nd_exec_control & SECONDARY_EXEC_ENABLE_EPT) { |
a7052897 MT |
3171 | /* CR3 accesses and invlpg don't need to cause VM Exits when EPT |
3172 | enabled */ | |
5fff7d27 GN |
3173 | _cpu_based_exec_control &= ~(CPU_BASED_CR3_LOAD_EXITING | |
3174 | CPU_BASED_CR3_STORE_EXITING | | |
3175 | CPU_BASED_INVLPG_EXITING); | |
d56f546d SY |
3176 | rdmsr(MSR_IA32_VMX_EPT_VPID_CAP, |
3177 | vmx_capability.ept, vmx_capability.vpid); | |
3178 | } | |
1c3d14fe | 3179 | |
81908bf4 | 3180 | min = VM_EXIT_SAVE_DEBUG_CONTROLS; |
1c3d14fe YS |
3181 | #ifdef CONFIG_X86_64 |
3182 | min |= VM_EXIT_HOST_ADDR_SPACE_SIZE; | |
3183 | #endif | |
a547c6db | 3184 | opt = VM_EXIT_SAVE_IA32_PAT | VM_EXIT_LOAD_IA32_PAT | |
da8999d3 | 3185 | VM_EXIT_ACK_INTR_ON_EXIT | VM_EXIT_CLEAR_BNDCFGS; |
1c3d14fe YS |
3186 | if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_EXIT_CTLS, |
3187 | &_vmexit_control) < 0) | |
002c7f7c | 3188 | return -EIO; |
1c3d14fe | 3189 | |
01e439be YZ |
3190 | min = PIN_BASED_EXT_INTR_MASK | PIN_BASED_NMI_EXITING; |
3191 | opt = PIN_BASED_VIRTUAL_NMIS | PIN_BASED_POSTED_INTR; | |
3192 | if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_PINBASED_CTLS, | |
3193 | &_pin_based_exec_control) < 0) | |
3194 | return -EIO; | |
3195 | ||
3196 | if (!(_cpu_based_2nd_exec_control & | |
3197 | SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY) || | |
3198 | !(_vmexit_control & VM_EXIT_ACK_INTR_ON_EXIT)) | |
3199 | _pin_based_exec_control &= ~PIN_BASED_POSTED_INTR; | |
3200 | ||
c845f9c6 | 3201 | min = VM_ENTRY_LOAD_DEBUG_CONTROLS; |
da8999d3 | 3202 | opt = VM_ENTRY_LOAD_IA32_PAT | VM_ENTRY_LOAD_BNDCFGS; |
1c3d14fe YS |
3203 | if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_ENTRY_CTLS, |
3204 | &_vmentry_control) < 0) | |
002c7f7c | 3205 | return -EIO; |
6aa8b732 | 3206 | |
c68876fd | 3207 | rdmsr(MSR_IA32_VMX_BASIC, vmx_msr_low, vmx_msr_high); |
1c3d14fe YS |
3208 | |
3209 | /* IA-32 SDM Vol 3B: VMCS size is never greater than 4kB. */ | |
3210 | if ((vmx_msr_high & 0x1fff) > PAGE_SIZE) | |
002c7f7c | 3211 | return -EIO; |
1c3d14fe YS |
3212 | |
3213 | #ifdef CONFIG_X86_64 | |
3214 | /* IA-32 SDM Vol 3B: 64-bit CPUs always have VMX_BASIC_MSR[48]==0. */ | |
3215 | if (vmx_msr_high & (1u<<16)) | |
002c7f7c | 3216 | return -EIO; |
1c3d14fe YS |
3217 | #endif |
3218 | ||
3219 | /* Require Write-Back (WB) memory type for VMCS accesses. */ | |
3220 | if (((vmx_msr_high >> 18) & 15) != 6) | |
002c7f7c | 3221 | return -EIO; |
1c3d14fe | 3222 | |
002c7f7c YS |
3223 | vmcs_conf->size = vmx_msr_high & 0x1fff; |
3224 | vmcs_conf->order = get_order(vmcs_config.size); | |
3225 | vmcs_conf->revision_id = vmx_msr_low; | |
1c3d14fe | 3226 | |
002c7f7c YS |
3227 | vmcs_conf->pin_based_exec_ctrl = _pin_based_exec_control; |
3228 | vmcs_conf->cpu_based_exec_ctrl = _cpu_based_exec_control; | |
f78e0e2e | 3229 | vmcs_conf->cpu_based_2nd_exec_ctrl = _cpu_based_2nd_exec_control; |
002c7f7c YS |
3230 | vmcs_conf->vmexit_ctrl = _vmexit_control; |
3231 | vmcs_conf->vmentry_ctrl = _vmentry_control; | |
1c3d14fe | 3232 | |
110312c8 AK |
3233 | cpu_has_load_ia32_efer = |
3234 | allow_1_setting(MSR_IA32_VMX_ENTRY_CTLS, | |
3235 | VM_ENTRY_LOAD_IA32_EFER) | |
3236 | && allow_1_setting(MSR_IA32_VMX_EXIT_CTLS, | |
3237 | VM_EXIT_LOAD_IA32_EFER); | |
3238 | ||
8bf00a52 GN |
3239 | cpu_has_load_perf_global_ctrl = |
3240 | allow_1_setting(MSR_IA32_VMX_ENTRY_CTLS, | |
3241 | VM_ENTRY_LOAD_IA32_PERF_GLOBAL_CTRL) | |
3242 | && allow_1_setting(MSR_IA32_VMX_EXIT_CTLS, | |
3243 | VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL); | |
3244 | ||
3245 | /* | |
3246 | * Some cpus support VM_ENTRY_(LOAD|SAVE)_IA32_PERF_GLOBAL_CTRL | |
3247 | * but due to arrata below it can't be used. Workaround is to use | |
3248 | * msr load mechanism to switch IA32_PERF_GLOBAL_CTRL. | |
3249 | * | |
3250 | * VM Exit May Incorrectly Clear IA32_PERF_GLOBAL_CTRL [34:32] | |
3251 | * | |
3252 | * AAK155 (model 26) | |
3253 | * AAP115 (model 30) | |
3254 | * AAT100 (model 37) | |
3255 | * BC86,AAY89,BD102 (model 44) | |
3256 | * BA97 (model 46) | |
3257 | * | |
3258 | */ | |
3259 | if (cpu_has_load_perf_global_ctrl && boot_cpu_data.x86 == 0x6) { | |
3260 | switch (boot_cpu_data.x86_model) { | |
3261 | case 26: | |
3262 | case 30: | |
3263 | case 37: | |
3264 | case 44: | |
3265 | case 46: | |
3266 | cpu_has_load_perf_global_ctrl = false; | |
3267 | printk_once(KERN_WARNING"kvm: VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL " | |
3268 | "does not work properly. Using workaround\n"); | |
3269 | break; | |
3270 | default: | |
3271 | break; | |
3272 | } | |
3273 | } | |
3274 | ||
20300099 WL |
3275 | if (cpu_has_xsaves) |
3276 | rdmsrl(MSR_IA32_XSS, host_xss); | |
3277 | ||
1c3d14fe | 3278 | return 0; |
c68876fd | 3279 | } |
6aa8b732 AK |
3280 | |
3281 | static struct vmcs *alloc_vmcs_cpu(int cpu) | |
3282 | { | |
3283 | int node = cpu_to_node(cpu); | |
3284 | struct page *pages; | |
3285 | struct vmcs *vmcs; | |
3286 | ||
96db800f | 3287 | pages = __alloc_pages_node(node, GFP_KERNEL, vmcs_config.order); |
6aa8b732 AK |
3288 | if (!pages) |
3289 | return NULL; | |
3290 | vmcs = page_address(pages); | |
1c3d14fe YS |
3291 | memset(vmcs, 0, vmcs_config.size); |
3292 | vmcs->revision_id = vmcs_config.revision_id; /* vmcs revision id */ | |
6aa8b732 AK |
3293 | return vmcs; |
3294 | } | |
3295 | ||
3296 | static struct vmcs *alloc_vmcs(void) | |
3297 | { | |
d3b2c338 | 3298 | return alloc_vmcs_cpu(raw_smp_processor_id()); |
6aa8b732 AK |
3299 | } |
3300 | ||
3301 | static void free_vmcs(struct vmcs *vmcs) | |
3302 | { | |
1c3d14fe | 3303 | free_pages((unsigned long)vmcs, vmcs_config.order); |
6aa8b732 AK |
3304 | } |
3305 | ||
d462b819 NHE |
3306 | /* |
3307 | * Free a VMCS, but before that VMCLEAR it on the CPU where it was last loaded | |
3308 | */ | |
3309 | static void free_loaded_vmcs(struct loaded_vmcs *loaded_vmcs) | |
3310 | { | |
3311 | if (!loaded_vmcs->vmcs) | |
3312 | return; | |
3313 | loaded_vmcs_clear(loaded_vmcs); | |
3314 | free_vmcs(loaded_vmcs->vmcs); | |
3315 | loaded_vmcs->vmcs = NULL; | |
3316 | } | |
3317 | ||
39959588 | 3318 | static void free_kvm_area(void) |
6aa8b732 AK |
3319 | { |
3320 | int cpu; | |
3321 | ||
3230bb47 | 3322 | for_each_possible_cpu(cpu) { |
6aa8b732 | 3323 | free_vmcs(per_cpu(vmxarea, cpu)); |
3230bb47 ZA |
3324 | per_cpu(vmxarea, cpu) = NULL; |
3325 | } | |
6aa8b732 AK |
3326 | } |
3327 | ||
fe2b201b BD |
3328 | static void init_vmcs_shadow_fields(void) |
3329 | { | |
3330 | int i, j; | |
3331 | ||
3332 | /* No checks for read only fields yet */ | |
3333 | ||
3334 | for (i = j = 0; i < max_shadow_read_write_fields; i++) { | |
3335 | switch (shadow_read_write_fields[i]) { | |
3336 | case GUEST_BNDCFGS: | |
3337 | if (!vmx_mpx_supported()) | |
3338 | continue; | |
3339 | break; | |
3340 | default: | |
3341 | break; | |
3342 | } | |
3343 | ||
3344 | if (j < i) | |
3345 | shadow_read_write_fields[j] = | |
3346 | shadow_read_write_fields[i]; | |
3347 | j++; | |
3348 | } | |
3349 | max_shadow_read_write_fields = j; | |
3350 | ||
3351 | /* shadowed fields guest access without vmexit */ | |
3352 | for (i = 0; i < max_shadow_read_write_fields; i++) { | |
3353 | clear_bit(shadow_read_write_fields[i], | |
3354 | vmx_vmwrite_bitmap); | |
3355 | clear_bit(shadow_read_write_fields[i], | |
3356 | vmx_vmread_bitmap); | |
3357 | } | |
3358 | for (i = 0; i < max_shadow_read_only_fields; i++) | |
3359 | clear_bit(shadow_read_only_fields[i], | |
3360 | vmx_vmread_bitmap); | |
3361 | } | |
3362 | ||
6aa8b732 AK |
3363 | static __init int alloc_kvm_area(void) |
3364 | { | |
3365 | int cpu; | |
3366 | ||
3230bb47 | 3367 | for_each_possible_cpu(cpu) { |
6aa8b732 AK |
3368 | struct vmcs *vmcs; |
3369 | ||
3370 | vmcs = alloc_vmcs_cpu(cpu); | |
3371 | if (!vmcs) { | |
3372 | free_kvm_area(); | |
3373 | return -ENOMEM; | |
3374 | } | |
3375 | ||
3376 | per_cpu(vmxarea, cpu) = vmcs; | |
3377 | } | |
3378 | return 0; | |
3379 | } | |
3380 | ||
14168786 GN |
3381 | static bool emulation_required(struct kvm_vcpu *vcpu) |
3382 | { | |
3383 | return emulate_invalid_guest_state && !guest_state_valid(vcpu); | |
3384 | } | |
3385 | ||
91b0aa2c | 3386 | static void fix_pmode_seg(struct kvm_vcpu *vcpu, int seg, |
d99e4152 | 3387 | struct kvm_segment *save) |
6aa8b732 | 3388 | { |
d99e4152 GN |
3389 | if (!emulate_invalid_guest_state) { |
3390 | /* | |
3391 | * CS and SS RPL should be equal during guest entry according | |
3392 | * to VMX spec, but in reality it is not always so. Since vcpu | |
3393 | * is in the middle of the transition from real mode to | |
3394 | * protected mode it is safe to assume that RPL 0 is a good | |
3395 | * default value. | |
3396 | */ | |
3397 | if (seg == VCPU_SREG_CS || seg == VCPU_SREG_SS) | |
b32a9918 NA |
3398 | save->selector &= ~SEGMENT_RPL_MASK; |
3399 | save->dpl = save->selector & SEGMENT_RPL_MASK; | |
d99e4152 | 3400 | save->s = 1; |
6aa8b732 | 3401 | } |
d99e4152 | 3402 | vmx_set_segment(vcpu, save, seg); |
6aa8b732 AK |
3403 | } |
3404 | ||
3405 | static void enter_pmode(struct kvm_vcpu *vcpu) | |
3406 | { | |
3407 | unsigned long flags; | |
a89a8fb9 | 3408 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
6aa8b732 | 3409 | |
d99e4152 GN |
3410 | /* |
3411 | * Update real mode segment cache. It may be not up-to-date if sement | |
3412 | * register was written while vcpu was in a guest mode. | |
3413 | */ | |
3414 | vmx_get_segment(vcpu, &vmx->rmode.segs[VCPU_SREG_ES], VCPU_SREG_ES); | |
3415 | vmx_get_segment(vcpu, &vmx->rmode.segs[VCPU_SREG_DS], VCPU_SREG_DS); | |
3416 | vmx_get_segment(vcpu, &vmx->rmode.segs[VCPU_SREG_FS], VCPU_SREG_FS); | |
3417 | vmx_get_segment(vcpu, &vmx->rmode.segs[VCPU_SREG_GS], VCPU_SREG_GS); | |
3418 | vmx_get_segment(vcpu, &vmx->rmode.segs[VCPU_SREG_SS], VCPU_SREG_SS); | |
3419 | vmx_get_segment(vcpu, &vmx->rmode.segs[VCPU_SREG_CS], VCPU_SREG_CS); | |
3420 | ||
7ffd92c5 | 3421 | vmx->rmode.vm86_active = 0; |
6aa8b732 | 3422 | |
2fb92db1 AK |
3423 | vmx_segment_cache_clear(vmx); |
3424 | ||
f5f7b2fe | 3425 | vmx_set_segment(vcpu, &vmx->rmode.segs[VCPU_SREG_TR], VCPU_SREG_TR); |
6aa8b732 AK |
3426 | |
3427 | flags = vmcs_readl(GUEST_RFLAGS); | |
78ac8b47 AK |
3428 | flags &= RMODE_GUEST_OWNED_EFLAGS_BITS; |
3429 | flags |= vmx->rmode.save_rflags & ~RMODE_GUEST_OWNED_EFLAGS_BITS; | |
6aa8b732 AK |
3430 | vmcs_writel(GUEST_RFLAGS, flags); |
3431 | ||
66aee91a RR |
3432 | vmcs_writel(GUEST_CR4, (vmcs_readl(GUEST_CR4) & ~X86_CR4_VME) | |
3433 | (vmcs_readl(CR4_READ_SHADOW) & X86_CR4_VME)); | |
6aa8b732 AK |
3434 | |
3435 | update_exception_bitmap(vcpu); | |
3436 | ||
91b0aa2c GN |
3437 | fix_pmode_seg(vcpu, VCPU_SREG_CS, &vmx->rmode.segs[VCPU_SREG_CS]); |
3438 | fix_pmode_seg(vcpu, VCPU_SREG_SS, &vmx->rmode.segs[VCPU_SREG_SS]); | |
3439 | fix_pmode_seg(vcpu, VCPU_SREG_ES, &vmx->rmode.segs[VCPU_SREG_ES]); | |
3440 | fix_pmode_seg(vcpu, VCPU_SREG_DS, &vmx->rmode.segs[VCPU_SREG_DS]); | |
3441 | fix_pmode_seg(vcpu, VCPU_SREG_FS, &vmx->rmode.segs[VCPU_SREG_FS]); | |
3442 | fix_pmode_seg(vcpu, VCPU_SREG_GS, &vmx->rmode.segs[VCPU_SREG_GS]); | |
6aa8b732 AK |
3443 | } |
3444 | ||
f5f7b2fe | 3445 | static void fix_rmode_seg(int seg, struct kvm_segment *save) |
6aa8b732 | 3446 | { |
772e0318 | 3447 | const struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; |
d99e4152 GN |
3448 | struct kvm_segment var = *save; |
3449 | ||
3450 | var.dpl = 0x3; | |
3451 | if (seg == VCPU_SREG_CS) | |
3452 | var.type = 0x3; | |
3453 | ||
3454 | if (!emulate_invalid_guest_state) { | |
3455 | var.selector = var.base >> 4; | |
3456 | var.base = var.base & 0xffff0; | |
3457 | var.limit = 0xffff; | |
3458 | var.g = 0; | |
3459 | var.db = 0; | |
3460 | var.present = 1; | |
3461 | var.s = 1; | |
3462 | var.l = 0; | |
3463 | var.unusable = 0; | |
3464 | var.type = 0x3; | |
3465 | var.avl = 0; | |
3466 | if (save->base & 0xf) | |
3467 | printk_once(KERN_WARNING "kvm: segment base is not " | |
3468 | "paragraph aligned when entering " | |
3469 | "protected mode (seg=%d)", seg); | |
3470 | } | |
6aa8b732 | 3471 | |
d99e4152 GN |
3472 | vmcs_write16(sf->selector, var.selector); |
3473 | vmcs_write32(sf->base, var.base); | |
3474 | vmcs_write32(sf->limit, var.limit); | |
3475 | vmcs_write32(sf->ar_bytes, vmx_segment_access_rights(&var)); | |
6aa8b732 AK |
3476 | } |
3477 | ||
3478 | static void enter_rmode(struct kvm_vcpu *vcpu) | |
3479 | { | |
3480 | unsigned long flags; | |
a89a8fb9 | 3481 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
6aa8b732 | 3482 | |
f5f7b2fe AK |
3483 | vmx_get_segment(vcpu, &vmx->rmode.segs[VCPU_SREG_TR], VCPU_SREG_TR); |
3484 | vmx_get_segment(vcpu, &vmx->rmode.segs[VCPU_SREG_ES], VCPU_SREG_ES); | |
3485 | vmx_get_segment(vcpu, &vmx->rmode.segs[VCPU_SREG_DS], VCPU_SREG_DS); | |
3486 | vmx_get_segment(vcpu, &vmx->rmode.segs[VCPU_SREG_FS], VCPU_SREG_FS); | |
3487 | vmx_get_segment(vcpu, &vmx->rmode.segs[VCPU_SREG_GS], VCPU_SREG_GS); | |
c6ad1153 GN |
3488 | vmx_get_segment(vcpu, &vmx->rmode.segs[VCPU_SREG_SS], VCPU_SREG_SS); |
3489 | vmx_get_segment(vcpu, &vmx->rmode.segs[VCPU_SREG_CS], VCPU_SREG_CS); | |
f5f7b2fe | 3490 | |
7ffd92c5 | 3491 | vmx->rmode.vm86_active = 1; |
6aa8b732 | 3492 | |
776e58ea GN |
3493 | /* |
3494 | * Very old userspace does not call KVM_SET_TSS_ADDR before entering | |
4918c6ca | 3495 | * vcpu. Warn the user that an update is overdue. |
776e58ea | 3496 | */ |
4918c6ca | 3497 | if (!vcpu->kvm->arch.tss_addr) |
776e58ea GN |
3498 | printk_once(KERN_WARNING "kvm: KVM_SET_TSS_ADDR need to be " |
3499 | "called before entering vcpu\n"); | |
776e58ea | 3500 | |
2fb92db1 AK |
3501 | vmx_segment_cache_clear(vmx); |
3502 | ||
4918c6ca | 3503 | vmcs_writel(GUEST_TR_BASE, vcpu->kvm->arch.tss_addr); |
6aa8b732 | 3504 | vmcs_write32(GUEST_TR_LIMIT, RMODE_TSS_SIZE - 1); |
6aa8b732 AK |
3505 | vmcs_write32(GUEST_TR_AR_BYTES, 0x008b); |
3506 | ||
3507 | flags = vmcs_readl(GUEST_RFLAGS); | |
78ac8b47 | 3508 | vmx->rmode.save_rflags = flags; |
6aa8b732 | 3509 | |
053de044 | 3510 | flags |= X86_EFLAGS_IOPL | X86_EFLAGS_VM; |
6aa8b732 AK |
3511 | |
3512 | vmcs_writel(GUEST_RFLAGS, flags); | |
66aee91a | 3513 | vmcs_writel(GUEST_CR4, vmcs_readl(GUEST_CR4) | X86_CR4_VME); |
6aa8b732 AK |
3514 | update_exception_bitmap(vcpu); |
3515 | ||
d99e4152 GN |
3516 | fix_rmode_seg(VCPU_SREG_SS, &vmx->rmode.segs[VCPU_SREG_SS]); |
3517 | fix_rmode_seg(VCPU_SREG_CS, &vmx->rmode.segs[VCPU_SREG_CS]); | |
3518 | fix_rmode_seg(VCPU_SREG_ES, &vmx->rmode.segs[VCPU_SREG_ES]); | |
3519 | fix_rmode_seg(VCPU_SREG_DS, &vmx->rmode.segs[VCPU_SREG_DS]); | |
3520 | fix_rmode_seg(VCPU_SREG_GS, &vmx->rmode.segs[VCPU_SREG_GS]); | |
3521 | fix_rmode_seg(VCPU_SREG_FS, &vmx->rmode.segs[VCPU_SREG_FS]); | |
b246dd5d | 3522 | |
8668a3c4 | 3523 | kvm_mmu_reset_context(vcpu); |
6aa8b732 AK |
3524 | } |
3525 | ||
401d10de AS |
3526 | static void vmx_set_efer(struct kvm_vcpu *vcpu, u64 efer) |
3527 | { | |
3528 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
26bb0981 AK |
3529 | struct shared_msr_entry *msr = find_msr_entry(vmx, MSR_EFER); |
3530 | ||
3531 | if (!msr) | |
3532 | return; | |
401d10de | 3533 | |
44ea2b17 AK |
3534 | /* |
3535 | * Force kernel_gs_base reloading before EFER changes, as control | |
3536 | * of this msr depends on is_long_mode(). | |
3537 | */ | |
3538 | vmx_load_host_state(to_vmx(vcpu)); | |
f6801dff | 3539 | vcpu->arch.efer = efer; |
401d10de | 3540 | if (efer & EFER_LMA) { |
2961e876 | 3541 | vm_entry_controls_setbit(to_vmx(vcpu), VM_ENTRY_IA32E_MODE); |
401d10de AS |
3542 | msr->data = efer; |
3543 | } else { | |
2961e876 | 3544 | vm_entry_controls_clearbit(to_vmx(vcpu), VM_ENTRY_IA32E_MODE); |
401d10de AS |
3545 | |
3546 | msr->data = efer & ~EFER_LME; | |
3547 | } | |
3548 | setup_msrs(vmx); | |
3549 | } | |
3550 | ||
05b3e0c2 | 3551 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
3552 | |
3553 | static void enter_lmode(struct kvm_vcpu *vcpu) | |
3554 | { | |
3555 | u32 guest_tr_ar; | |
3556 | ||
2fb92db1 AK |
3557 | vmx_segment_cache_clear(to_vmx(vcpu)); |
3558 | ||
6aa8b732 | 3559 | guest_tr_ar = vmcs_read32(GUEST_TR_AR_BYTES); |
4d283ec9 | 3560 | if ((guest_tr_ar & VMX_AR_TYPE_MASK) != VMX_AR_TYPE_BUSY_64_TSS) { |
bd80158a JK |
3561 | pr_debug_ratelimited("%s: tss fixup for long mode. \n", |
3562 | __func__); | |
6aa8b732 | 3563 | vmcs_write32(GUEST_TR_AR_BYTES, |
4d283ec9 AL |
3564 | (guest_tr_ar & ~VMX_AR_TYPE_MASK) |
3565 | | VMX_AR_TYPE_BUSY_64_TSS); | |
6aa8b732 | 3566 | } |
da38f438 | 3567 | vmx_set_efer(vcpu, vcpu->arch.efer | EFER_LMA); |
6aa8b732 AK |
3568 | } |
3569 | ||
3570 | static void exit_lmode(struct kvm_vcpu *vcpu) | |
3571 | { | |
2961e876 | 3572 | vm_entry_controls_clearbit(to_vmx(vcpu), VM_ENTRY_IA32E_MODE); |
da38f438 | 3573 | vmx_set_efer(vcpu, vcpu->arch.efer & ~EFER_LMA); |
6aa8b732 AK |
3574 | } |
3575 | ||
3576 | #endif | |
3577 | ||
dd5f5341 | 3578 | static inline void __vmx_flush_tlb(struct kvm_vcpu *vcpu, int vpid) |
2384d2b3 | 3579 | { |
dd5f5341 | 3580 | vpid_sync_context(vpid); |
dd180b3e XG |
3581 | if (enable_ept) { |
3582 | if (!VALID_PAGE(vcpu->arch.mmu.root_hpa)) | |
3583 | return; | |
4e1096d2 | 3584 | ept_sync_context(construct_eptp(vcpu->arch.mmu.root_hpa)); |
dd180b3e | 3585 | } |
2384d2b3 SY |
3586 | } |
3587 | ||
dd5f5341 WL |
3588 | static void vmx_flush_tlb(struct kvm_vcpu *vcpu) |
3589 | { | |
3590 | __vmx_flush_tlb(vcpu, to_vmx(vcpu)->vpid); | |
3591 | } | |
3592 | ||
e8467fda AK |
3593 | static void vmx_decache_cr0_guest_bits(struct kvm_vcpu *vcpu) |
3594 | { | |
3595 | ulong cr0_guest_owned_bits = vcpu->arch.cr0_guest_owned_bits; | |
3596 | ||
3597 | vcpu->arch.cr0 &= ~cr0_guest_owned_bits; | |
3598 | vcpu->arch.cr0 |= vmcs_readl(GUEST_CR0) & cr0_guest_owned_bits; | |
3599 | } | |
3600 | ||
aff48baa AK |
3601 | static void vmx_decache_cr3(struct kvm_vcpu *vcpu) |
3602 | { | |
3603 | if (enable_ept && is_paging(vcpu)) | |
3604 | vcpu->arch.cr3 = vmcs_readl(GUEST_CR3); | |
3605 | __set_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail); | |
3606 | } | |
3607 | ||
25c4c276 | 3608 | static void vmx_decache_cr4_guest_bits(struct kvm_vcpu *vcpu) |
399badf3 | 3609 | { |
fc78f519 AK |
3610 | ulong cr4_guest_owned_bits = vcpu->arch.cr4_guest_owned_bits; |
3611 | ||
3612 | vcpu->arch.cr4 &= ~cr4_guest_owned_bits; | |
3613 | vcpu->arch.cr4 |= vmcs_readl(GUEST_CR4) & cr4_guest_owned_bits; | |
399badf3 AK |
3614 | } |
3615 | ||
1439442c SY |
3616 | static void ept_load_pdptrs(struct kvm_vcpu *vcpu) |
3617 | { | |
d0d538b9 GN |
3618 | struct kvm_mmu *mmu = vcpu->arch.walk_mmu; |
3619 | ||
6de4f3ad AK |
3620 | if (!test_bit(VCPU_EXREG_PDPTR, |
3621 | (unsigned long *)&vcpu->arch.regs_dirty)) | |
3622 | return; | |
3623 | ||
1439442c | 3624 | if (is_paging(vcpu) && is_pae(vcpu) && !is_long_mode(vcpu)) { |
d0d538b9 GN |
3625 | vmcs_write64(GUEST_PDPTR0, mmu->pdptrs[0]); |
3626 | vmcs_write64(GUEST_PDPTR1, mmu->pdptrs[1]); | |
3627 | vmcs_write64(GUEST_PDPTR2, mmu->pdptrs[2]); | |
3628 | vmcs_write64(GUEST_PDPTR3, mmu->pdptrs[3]); | |
1439442c SY |
3629 | } |
3630 | } | |
3631 | ||
8f5d549f AK |
3632 | static void ept_save_pdptrs(struct kvm_vcpu *vcpu) |
3633 | { | |
d0d538b9 GN |
3634 | struct kvm_mmu *mmu = vcpu->arch.walk_mmu; |
3635 | ||
8f5d549f | 3636 | if (is_paging(vcpu) && is_pae(vcpu) && !is_long_mode(vcpu)) { |
d0d538b9 GN |
3637 | mmu->pdptrs[0] = vmcs_read64(GUEST_PDPTR0); |
3638 | mmu->pdptrs[1] = vmcs_read64(GUEST_PDPTR1); | |
3639 | mmu->pdptrs[2] = vmcs_read64(GUEST_PDPTR2); | |
3640 | mmu->pdptrs[3] = vmcs_read64(GUEST_PDPTR3); | |
8f5d549f | 3641 | } |
6de4f3ad AK |
3642 | |
3643 | __set_bit(VCPU_EXREG_PDPTR, | |
3644 | (unsigned long *)&vcpu->arch.regs_avail); | |
3645 | __set_bit(VCPU_EXREG_PDPTR, | |
3646 | (unsigned long *)&vcpu->arch.regs_dirty); | |
8f5d549f AK |
3647 | } |
3648 | ||
5e1746d6 | 3649 | static int vmx_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4); |
1439442c SY |
3650 | |
3651 | static void ept_update_paging_mode_cr0(unsigned long *hw_cr0, | |
3652 | unsigned long cr0, | |
3653 | struct kvm_vcpu *vcpu) | |
3654 | { | |
5233dd51 MT |
3655 | if (!test_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail)) |
3656 | vmx_decache_cr3(vcpu); | |
1439442c SY |
3657 | if (!(cr0 & X86_CR0_PG)) { |
3658 | /* From paging/starting to nonpaging */ | |
3659 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, | |
65267ea1 | 3660 | vmcs_read32(CPU_BASED_VM_EXEC_CONTROL) | |
1439442c SY |
3661 | (CPU_BASED_CR3_LOAD_EXITING | |
3662 | CPU_BASED_CR3_STORE_EXITING)); | |
3663 | vcpu->arch.cr0 = cr0; | |
fc78f519 | 3664 | vmx_set_cr4(vcpu, kvm_read_cr4(vcpu)); |
1439442c SY |
3665 | } else if (!is_paging(vcpu)) { |
3666 | /* From nonpaging to paging */ | |
3667 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, | |
65267ea1 | 3668 | vmcs_read32(CPU_BASED_VM_EXEC_CONTROL) & |
1439442c SY |
3669 | ~(CPU_BASED_CR3_LOAD_EXITING | |
3670 | CPU_BASED_CR3_STORE_EXITING)); | |
3671 | vcpu->arch.cr0 = cr0; | |
fc78f519 | 3672 | vmx_set_cr4(vcpu, kvm_read_cr4(vcpu)); |
1439442c | 3673 | } |
95eb84a7 SY |
3674 | |
3675 | if (!(cr0 & X86_CR0_WP)) | |
3676 | *hw_cr0 &= ~X86_CR0_WP; | |
1439442c SY |
3677 | } |
3678 | ||
6aa8b732 AK |
3679 | static void vmx_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) |
3680 | { | |
7ffd92c5 | 3681 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
3a624e29 NK |
3682 | unsigned long hw_cr0; |
3683 | ||
5037878e | 3684 | hw_cr0 = (cr0 & ~KVM_GUEST_CR0_MASK); |
3a624e29 | 3685 | if (enable_unrestricted_guest) |
5037878e | 3686 | hw_cr0 |= KVM_VM_CR0_ALWAYS_ON_UNRESTRICTED_GUEST; |
218e763f | 3687 | else { |
5037878e | 3688 | hw_cr0 |= KVM_VM_CR0_ALWAYS_ON; |
1439442c | 3689 | |
218e763f GN |
3690 | if (vmx->rmode.vm86_active && (cr0 & X86_CR0_PE)) |
3691 | enter_pmode(vcpu); | |
6aa8b732 | 3692 | |
218e763f GN |
3693 | if (!vmx->rmode.vm86_active && !(cr0 & X86_CR0_PE)) |
3694 | enter_rmode(vcpu); | |
3695 | } | |
6aa8b732 | 3696 | |
05b3e0c2 | 3697 | #ifdef CONFIG_X86_64 |
f6801dff | 3698 | if (vcpu->arch.efer & EFER_LME) { |
707d92fa | 3699 | if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) |
6aa8b732 | 3700 | enter_lmode(vcpu); |
707d92fa | 3701 | if (is_paging(vcpu) && !(cr0 & X86_CR0_PG)) |
6aa8b732 AK |
3702 | exit_lmode(vcpu); |
3703 | } | |
3704 | #endif | |
3705 | ||
089d034e | 3706 | if (enable_ept) |
1439442c SY |
3707 | ept_update_paging_mode_cr0(&hw_cr0, cr0, vcpu); |
3708 | ||
02daab21 | 3709 | if (!vcpu->fpu_active) |
81231c69 | 3710 | hw_cr0 |= X86_CR0_TS | X86_CR0_MP; |
02daab21 | 3711 | |
6aa8b732 | 3712 | vmcs_writel(CR0_READ_SHADOW, cr0); |
1439442c | 3713 | vmcs_writel(GUEST_CR0, hw_cr0); |
ad312c7c | 3714 | vcpu->arch.cr0 = cr0; |
14168786 GN |
3715 | |
3716 | /* depends on vcpu->arch.cr0 to be set to a new value */ | |
3717 | vmx->emulation_required = emulation_required(vcpu); | |
6aa8b732 AK |
3718 | } |
3719 | ||
1439442c SY |
3720 | static u64 construct_eptp(unsigned long root_hpa) |
3721 | { | |
3722 | u64 eptp; | |
3723 | ||
3724 | /* TODO write the value reading from MSR */ | |
3725 | eptp = VMX_EPT_DEFAULT_MT | | |
3726 | VMX_EPT_DEFAULT_GAW << VMX_EPT_GAW_EPTP_SHIFT; | |
b38f9934 XH |
3727 | if (enable_ept_ad_bits) |
3728 | eptp |= VMX_EPT_AD_ENABLE_BIT; | |
1439442c SY |
3729 | eptp |= (root_hpa & PAGE_MASK); |
3730 | ||
3731 | return eptp; | |
3732 | } | |
3733 | ||
6aa8b732 AK |
3734 | static void vmx_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3) |
3735 | { | |
1439442c SY |
3736 | unsigned long guest_cr3; |
3737 | u64 eptp; | |
3738 | ||
3739 | guest_cr3 = cr3; | |
089d034e | 3740 | if (enable_ept) { |
1439442c SY |
3741 | eptp = construct_eptp(cr3); |
3742 | vmcs_write64(EPT_POINTER, eptp); | |
59ab5a8f JK |
3743 | if (is_paging(vcpu) || is_guest_mode(vcpu)) |
3744 | guest_cr3 = kvm_read_cr3(vcpu); | |
3745 | else | |
3746 | guest_cr3 = vcpu->kvm->arch.ept_identity_map_addr; | |
7c93be44 | 3747 | ept_load_pdptrs(vcpu); |
1439442c SY |
3748 | } |
3749 | ||
2384d2b3 | 3750 | vmx_flush_tlb(vcpu); |
1439442c | 3751 | vmcs_writel(GUEST_CR3, guest_cr3); |
6aa8b732 AK |
3752 | } |
3753 | ||
5e1746d6 | 3754 | static int vmx_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4) |
6aa8b732 | 3755 | { |
085e68ee BS |
3756 | /* |
3757 | * Pass through host's Machine Check Enable value to hw_cr4, which | |
3758 | * is in force while we are in guest mode. Do not let guests control | |
3759 | * this bit, even if host CR4.MCE == 0. | |
3760 | */ | |
3761 | unsigned long hw_cr4 = | |
3762 | (cr4_read_shadow() & X86_CR4_MCE) | | |
3763 | (cr4 & ~X86_CR4_MCE) | | |
3764 | (to_vmx(vcpu)->rmode.vm86_active ? | |
3765 | KVM_RMODE_VM_CR4_ALWAYS_ON : KVM_PMODE_VM_CR4_ALWAYS_ON); | |
1439442c | 3766 | |
5e1746d6 NHE |
3767 | if (cr4 & X86_CR4_VMXE) { |
3768 | /* | |
3769 | * To use VMXON (and later other VMX instructions), a guest | |
3770 | * must first be able to turn on cr4.VMXE (see handle_vmon()). | |
3771 | * So basically the check on whether to allow nested VMX | |
3772 | * is here. | |
3773 | */ | |
3774 | if (!nested_vmx_allowed(vcpu)) | |
3775 | return 1; | |
1a0d74e6 JK |
3776 | } |
3777 | if (to_vmx(vcpu)->nested.vmxon && | |
3778 | ((cr4 & VMXON_CR4_ALWAYSON) != VMXON_CR4_ALWAYSON)) | |
5e1746d6 NHE |
3779 | return 1; |
3780 | ||
ad312c7c | 3781 | vcpu->arch.cr4 = cr4; |
bc23008b AK |
3782 | if (enable_ept) { |
3783 | if (!is_paging(vcpu)) { | |
3784 | hw_cr4 &= ~X86_CR4_PAE; | |
3785 | hw_cr4 |= X86_CR4_PSE; | |
3786 | } else if (!(cr4 & X86_CR4_PAE)) { | |
3787 | hw_cr4 &= ~X86_CR4_PAE; | |
3788 | } | |
3789 | } | |
1439442c | 3790 | |
656ec4a4 RK |
3791 | if (!enable_unrestricted_guest && !is_paging(vcpu)) |
3792 | /* | |
3793 | * SMEP/SMAP is disabled if CPU is in non-paging mode in | |
3794 | * hardware. However KVM always uses paging mode without | |
3795 | * unrestricted guest. | |
3796 | * To emulate this behavior, SMEP/SMAP needs to be manually | |
3797 | * disabled when guest switches to non-paging mode. | |
3798 | */ | |
3799 | hw_cr4 &= ~(X86_CR4_SMEP | X86_CR4_SMAP); | |
3800 | ||
1439442c SY |
3801 | vmcs_writel(CR4_READ_SHADOW, cr4); |
3802 | vmcs_writel(GUEST_CR4, hw_cr4); | |
5e1746d6 | 3803 | return 0; |
6aa8b732 AK |
3804 | } |
3805 | ||
6aa8b732 AK |
3806 | static void vmx_get_segment(struct kvm_vcpu *vcpu, |
3807 | struct kvm_segment *var, int seg) | |
3808 | { | |
a9179499 | 3809 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
6aa8b732 AK |
3810 | u32 ar; |
3811 | ||
c6ad1153 | 3812 | if (vmx->rmode.vm86_active && seg != VCPU_SREG_LDTR) { |
f5f7b2fe | 3813 | *var = vmx->rmode.segs[seg]; |
a9179499 | 3814 | if (seg == VCPU_SREG_TR |
2fb92db1 | 3815 | || var->selector == vmx_read_guest_seg_selector(vmx, seg)) |
f5f7b2fe | 3816 | return; |
1390a28b AK |
3817 | var->base = vmx_read_guest_seg_base(vmx, seg); |
3818 | var->selector = vmx_read_guest_seg_selector(vmx, seg); | |
3819 | return; | |
a9179499 | 3820 | } |
2fb92db1 AK |
3821 | var->base = vmx_read_guest_seg_base(vmx, seg); |
3822 | var->limit = vmx_read_guest_seg_limit(vmx, seg); | |
3823 | var->selector = vmx_read_guest_seg_selector(vmx, seg); | |
3824 | ar = vmx_read_guest_seg_ar(vmx, seg); | |
03617c18 | 3825 | var->unusable = (ar >> 16) & 1; |
6aa8b732 AK |
3826 | var->type = ar & 15; |
3827 | var->s = (ar >> 4) & 1; | |
3828 | var->dpl = (ar >> 5) & 3; | |
03617c18 GN |
3829 | /* |
3830 | * Some userspaces do not preserve unusable property. Since usable | |
3831 | * segment has to be present according to VMX spec we can use present | |
3832 | * property to amend userspace bug by making unusable segment always | |
3833 | * nonpresent. vmx_segment_access_rights() already marks nonpresent | |
3834 | * segment as unusable. | |
3835 | */ | |
3836 | var->present = !var->unusable; | |
6aa8b732 AK |
3837 | var->avl = (ar >> 12) & 1; |
3838 | var->l = (ar >> 13) & 1; | |
3839 | var->db = (ar >> 14) & 1; | |
3840 | var->g = (ar >> 15) & 1; | |
6aa8b732 AK |
3841 | } |
3842 | ||
a9179499 AK |
3843 | static u64 vmx_get_segment_base(struct kvm_vcpu *vcpu, int seg) |
3844 | { | |
a9179499 AK |
3845 | struct kvm_segment s; |
3846 | ||
3847 | if (to_vmx(vcpu)->rmode.vm86_active) { | |
3848 | vmx_get_segment(vcpu, &s, seg); | |
3849 | return s.base; | |
3850 | } | |
2fb92db1 | 3851 | return vmx_read_guest_seg_base(to_vmx(vcpu), seg); |
a9179499 AK |
3852 | } |
3853 | ||
b09408d0 | 3854 | static int vmx_get_cpl(struct kvm_vcpu *vcpu) |
2e4d2653 | 3855 | { |
b09408d0 MT |
3856 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
3857 | ||
ae9fedc7 | 3858 | if (unlikely(vmx->rmode.vm86_active)) |
2e4d2653 | 3859 | return 0; |
ae9fedc7 PB |
3860 | else { |
3861 | int ar = vmx_read_guest_seg_ar(vmx, VCPU_SREG_SS); | |
4d283ec9 | 3862 | return VMX_AR_DPL(ar); |
69c73028 | 3863 | } |
69c73028 AK |
3864 | } |
3865 | ||
653e3108 | 3866 | static u32 vmx_segment_access_rights(struct kvm_segment *var) |
6aa8b732 | 3867 | { |
6aa8b732 AK |
3868 | u32 ar; |
3869 | ||
f0495f9b | 3870 | if (var->unusable || !var->present) |
6aa8b732 AK |
3871 | ar = 1 << 16; |
3872 | else { | |
3873 | ar = var->type & 15; | |
3874 | ar |= (var->s & 1) << 4; | |
3875 | ar |= (var->dpl & 3) << 5; | |
3876 | ar |= (var->present & 1) << 7; | |
3877 | ar |= (var->avl & 1) << 12; | |
3878 | ar |= (var->l & 1) << 13; | |
3879 | ar |= (var->db & 1) << 14; | |
3880 | ar |= (var->g & 1) << 15; | |
3881 | } | |
653e3108 AK |
3882 | |
3883 | return ar; | |
3884 | } | |
3885 | ||
3886 | static void vmx_set_segment(struct kvm_vcpu *vcpu, | |
3887 | struct kvm_segment *var, int seg) | |
3888 | { | |
7ffd92c5 | 3889 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
772e0318 | 3890 | const struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; |
653e3108 | 3891 | |
2fb92db1 AK |
3892 | vmx_segment_cache_clear(vmx); |
3893 | ||
1ecd50a9 GN |
3894 | if (vmx->rmode.vm86_active && seg != VCPU_SREG_LDTR) { |
3895 | vmx->rmode.segs[seg] = *var; | |
3896 | if (seg == VCPU_SREG_TR) | |
3897 | vmcs_write16(sf->selector, var->selector); | |
3898 | else if (var->s) | |
3899 | fix_rmode_seg(seg, &vmx->rmode.segs[seg]); | |
d99e4152 | 3900 | goto out; |
653e3108 | 3901 | } |
1ecd50a9 | 3902 | |
653e3108 AK |
3903 | vmcs_writel(sf->base, var->base); |
3904 | vmcs_write32(sf->limit, var->limit); | |
3905 | vmcs_write16(sf->selector, var->selector); | |
3a624e29 NK |
3906 | |
3907 | /* | |
3908 | * Fix the "Accessed" bit in AR field of segment registers for older | |
3909 | * qemu binaries. | |
3910 | * IA32 arch specifies that at the time of processor reset the | |
3911 | * "Accessed" bit in the AR field of segment registers is 1. And qemu | |
0fa06071 | 3912 | * is setting it to 0 in the userland code. This causes invalid guest |
3a624e29 NK |
3913 | * state vmexit when "unrestricted guest" mode is turned on. |
3914 | * Fix for this setup issue in cpu_reset is being pushed in the qemu | |
3915 | * tree. Newer qemu binaries with that qemu fix would not need this | |
3916 | * kvm hack. | |
3917 | */ | |
3918 | if (enable_unrestricted_guest && (seg != VCPU_SREG_LDTR)) | |
f924d66d | 3919 | var->type |= 0x1; /* Accessed */ |
3a624e29 | 3920 | |
f924d66d | 3921 | vmcs_write32(sf->ar_bytes, vmx_segment_access_rights(var)); |
d99e4152 GN |
3922 | |
3923 | out: | |
98eb2f8b | 3924 | vmx->emulation_required = emulation_required(vcpu); |
6aa8b732 AK |
3925 | } |
3926 | ||
6aa8b732 AK |
3927 | static void vmx_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l) |
3928 | { | |
2fb92db1 | 3929 | u32 ar = vmx_read_guest_seg_ar(to_vmx(vcpu), VCPU_SREG_CS); |
6aa8b732 AK |
3930 | |
3931 | *db = (ar >> 14) & 1; | |
3932 | *l = (ar >> 13) & 1; | |
3933 | } | |
3934 | ||
89a27f4d | 3935 | static void vmx_get_idt(struct kvm_vcpu *vcpu, struct desc_ptr *dt) |
6aa8b732 | 3936 | { |
89a27f4d GN |
3937 | dt->size = vmcs_read32(GUEST_IDTR_LIMIT); |
3938 | dt->address = vmcs_readl(GUEST_IDTR_BASE); | |
6aa8b732 AK |
3939 | } |
3940 | ||
89a27f4d | 3941 | static void vmx_set_idt(struct kvm_vcpu *vcpu, struct desc_ptr *dt) |
6aa8b732 | 3942 | { |
89a27f4d GN |
3943 | vmcs_write32(GUEST_IDTR_LIMIT, dt->size); |
3944 | vmcs_writel(GUEST_IDTR_BASE, dt->address); | |
6aa8b732 AK |
3945 | } |
3946 | ||
89a27f4d | 3947 | static void vmx_get_gdt(struct kvm_vcpu *vcpu, struct desc_ptr *dt) |
6aa8b732 | 3948 | { |
89a27f4d GN |
3949 | dt->size = vmcs_read32(GUEST_GDTR_LIMIT); |
3950 | dt->address = vmcs_readl(GUEST_GDTR_BASE); | |
6aa8b732 AK |
3951 | } |
3952 | ||
89a27f4d | 3953 | static void vmx_set_gdt(struct kvm_vcpu *vcpu, struct desc_ptr *dt) |
6aa8b732 | 3954 | { |
89a27f4d GN |
3955 | vmcs_write32(GUEST_GDTR_LIMIT, dt->size); |
3956 | vmcs_writel(GUEST_GDTR_BASE, dt->address); | |
6aa8b732 AK |
3957 | } |
3958 | ||
648dfaa7 MG |
3959 | static bool rmode_segment_valid(struct kvm_vcpu *vcpu, int seg) |
3960 | { | |
3961 | struct kvm_segment var; | |
3962 | u32 ar; | |
3963 | ||
3964 | vmx_get_segment(vcpu, &var, seg); | |
07f42f5f | 3965 | var.dpl = 0x3; |
0647f4aa GN |
3966 | if (seg == VCPU_SREG_CS) |
3967 | var.type = 0x3; | |
648dfaa7 MG |
3968 | ar = vmx_segment_access_rights(&var); |
3969 | ||
3970 | if (var.base != (var.selector << 4)) | |
3971 | return false; | |
89efbed0 | 3972 | if (var.limit != 0xffff) |
648dfaa7 | 3973 | return false; |
07f42f5f | 3974 | if (ar != 0xf3) |
648dfaa7 MG |
3975 | return false; |
3976 | ||
3977 | return true; | |
3978 | } | |
3979 | ||
3980 | static bool code_segment_valid(struct kvm_vcpu *vcpu) | |
3981 | { | |
3982 | struct kvm_segment cs; | |
3983 | unsigned int cs_rpl; | |
3984 | ||
3985 | vmx_get_segment(vcpu, &cs, VCPU_SREG_CS); | |
b32a9918 | 3986 | cs_rpl = cs.selector & SEGMENT_RPL_MASK; |
648dfaa7 | 3987 | |
1872a3f4 AK |
3988 | if (cs.unusable) |
3989 | return false; | |
4d283ec9 | 3990 | if (~cs.type & (VMX_AR_TYPE_CODE_MASK|VMX_AR_TYPE_ACCESSES_MASK)) |
648dfaa7 MG |
3991 | return false; |
3992 | if (!cs.s) | |
3993 | return false; | |
4d283ec9 | 3994 | if (cs.type & VMX_AR_TYPE_WRITEABLE_MASK) { |
648dfaa7 MG |
3995 | if (cs.dpl > cs_rpl) |
3996 | return false; | |
1872a3f4 | 3997 | } else { |
648dfaa7 MG |
3998 | if (cs.dpl != cs_rpl) |
3999 | return false; | |
4000 | } | |
4001 | if (!cs.present) | |
4002 | return false; | |
4003 | ||
4004 | /* TODO: Add Reserved field check, this'll require a new member in the kvm_segment_field structure */ | |
4005 | return true; | |
4006 | } | |
4007 | ||
4008 | static bool stack_segment_valid(struct kvm_vcpu *vcpu) | |
4009 | { | |
4010 | struct kvm_segment ss; | |
4011 | unsigned int ss_rpl; | |
4012 | ||
4013 | vmx_get_segment(vcpu, &ss, VCPU_SREG_SS); | |
b32a9918 | 4014 | ss_rpl = ss.selector & SEGMENT_RPL_MASK; |
648dfaa7 | 4015 | |
1872a3f4 AK |
4016 | if (ss.unusable) |
4017 | return true; | |
4018 | if (ss.type != 3 && ss.type != 7) | |
648dfaa7 MG |
4019 | return false; |
4020 | if (!ss.s) | |
4021 | return false; | |
4022 | if (ss.dpl != ss_rpl) /* DPL != RPL */ | |
4023 | return false; | |
4024 | if (!ss.present) | |
4025 | return false; | |
4026 | ||
4027 | return true; | |
4028 | } | |
4029 | ||
4030 | static bool data_segment_valid(struct kvm_vcpu *vcpu, int seg) | |
4031 | { | |
4032 | struct kvm_segment var; | |
4033 | unsigned int rpl; | |
4034 | ||
4035 | vmx_get_segment(vcpu, &var, seg); | |
b32a9918 | 4036 | rpl = var.selector & SEGMENT_RPL_MASK; |
648dfaa7 | 4037 | |
1872a3f4 AK |
4038 | if (var.unusable) |
4039 | return true; | |
648dfaa7 MG |
4040 | if (!var.s) |
4041 | return false; | |
4042 | if (!var.present) | |
4043 | return false; | |
4d283ec9 | 4044 | if (~var.type & (VMX_AR_TYPE_CODE_MASK|VMX_AR_TYPE_WRITEABLE_MASK)) { |
648dfaa7 MG |
4045 | if (var.dpl < rpl) /* DPL < RPL */ |
4046 | return false; | |
4047 | } | |
4048 | ||
4049 | /* TODO: Add other members to kvm_segment_field to allow checking for other access | |
4050 | * rights flags | |
4051 | */ | |
4052 | return true; | |
4053 | } | |
4054 | ||
4055 | static bool tr_valid(struct kvm_vcpu *vcpu) | |
4056 | { | |
4057 | struct kvm_segment tr; | |
4058 | ||
4059 | vmx_get_segment(vcpu, &tr, VCPU_SREG_TR); | |
4060 | ||
1872a3f4 AK |
4061 | if (tr.unusable) |
4062 | return false; | |
b32a9918 | 4063 | if (tr.selector & SEGMENT_TI_MASK) /* TI = 1 */ |
648dfaa7 | 4064 | return false; |
1872a3f4 | 4065 | if (tr.type != 3 && tr.type != 11) /* TODO: Check if guest is in IA32e mode */ |
648dfaa7 MG |
4066 | return false; |
4067 | if (!tr.present) | |
4068 | return false; | |
4069 | ||
4070 | return true; | |
4071 | } | |
4072 | ||
4073 | static bool ldtr_valid(struct kvm_vcpu *vcpu) | |
4074 | { | |
4075 | struct kvm_segment ldtr; | |
4076 | ||
4077 | vmx_get_segment(vcpu, &ldtr, VCPU_SREG_LDTR); | |
4078 | ||
1872a3f4 AK |
4079 | if (ldtr.unusable) |
4080 | return true; | |
b32a9918 | 4081 | if (ldtr.selector & SEGMENT_TI_MASK) /* TI = 1 */ |
648dfaa7 MG |
4082 | return false; |
4083 | if (ldtr.type != 2) | |
4084 | return false; | |
4085 | if (!ldtr.present) | |
4086 | return false; | |
4087 | ||
4088 | return true; | |
4089 | } | |
4090 | ||
4091 | static bool cs_ss_rpl_check(struct kvm_vcpu *vcpu) | |
4092 | { | |
4093 | struct kvm_segment cs, ss; | |
4094 | ||
4095 | vmx_get_segment(vcpu, &cs, VCPU_SREG_CS); | |
4096 | vmx_get_segment(vcpu, &ss, VCPU_SREG_SS); | |
4097 | ||
b32a9918 NA |
4098 | return ((cs.selector & SEGMENT_RPL_MASK) == |
4099 | (ss.selector & SEGMENT_RPL_MASK)); | |
648dfaa7 MG |
4100 | } |
4101 | ||
4102 | /* | |
4103 | * Check if guest state is valid. Returns true if valid, false if | |
4104 | * not. | |
4105 | * We assume that registers are always usable | |
4106 | */ | |
4107 | static bool guest_state_valid(struct kvm_vcpu *vcpu) | |
4108 | { | |
c5e97c80 GN |
4109 | if (enable_unrestricted_guest) |
4110 | return true; | |
4111 | ||
648dfaa7 | 4112 | /* real mode guest state checks */ |
f13882d8 | 4113 | if (!is_protmode(vcpu) || (vmx_get_rflags(vcpu) & X86_EFLAGS_VM)) { |
648dfaa7 MG |
4114 | if (!rmode_segment_valid(vcpu, VCPU_SREG_CS)) |
4115 | return false; | |
4116 | if (!rmode_segment_valid(vcpu, VCPU_SREG_SS)) | |
4117 | return false; | |
4118 | if (!rmode_segment_valid(vcpu, VCPU_SREG_DS)) | |
4119 | return false; | |
4120 | if (!rmode_segment_valid(vcpu, VCPU_SREG_ES)) | |
4121 | return false; | |
4122 | if (!rmode_segment_valid(vcpu, VCPU_SREG_FS)) | |
4123 | return false; | |
4124 | if (!rmode_segment_valid(vcpu, VCPU_SREG_GS)) | |
4125 | return false; | |
4126 | } else { | |
4127 | /* protected mode guest state checks */ | |
4128 | if (!cs_ss_rpl_check(vcpu)) | |
4129 | return false; | |
4130 | if (!code_segment_valid(vcpu)) | |
4131 | return false; | |
4132 | if (!stack_segment_valid(vcpu)) | |
4133 | return false; | |
4134 | if (!data_segment_valid(vcpu, VCPU_SREG_DS)) | |
4135 | return false; | |
4136 | if (!data_segment_valid(vcpu, VCPU_SREG_ES)) | |
4137 | return false; | |
4138 | if (!data_segment_valid(vcpu, VCPU_SREG_FS)) | |
4139 | return false; | |
4140 | if (!data_segment_valid(vcpu, VCPU_SREG_GS)) | |
4141 | return false; | |
4142 | if (!tr_valid(vcpu)) | |
4143 | return false; | |
4144 | if (!ldtr_valid(vcpu)) | |
4145 | return false; | |
4146 | } | |
4147 | /* TODO: | |
4148 | * - Add checks on RIP | |
4149 | * - Add checks on RFLAGS | |
4150 | */ | |
4151 | ||
4152 | return true; | |
4153 | } | |
4154 | ||
d77c26fc | 4155 | static int init_rmode_tss(struct kvm *kvm) |
6aa8b732 | 4156 | { |
40dcaa9f | 4157 | gfn_t fn; |
195aefde | 4158 | u16 data = 0; |
1f755a82 | 4159 | int idx, r; |
6aa8b732 | 4160 | |
40dcaa9f | 4161 | idx = srcu_read_lock(&kvm->srcu); |
4918c6ca | 4162 | fn = kvm->arch.tss_addr >> PAGE_SHIFT; |
195aefde IE |
4163 | r = kvm_clear_guest_page(kvm, fn, 0, PAGE_SIZE); |
4164 | if (r < 0) | |
10589a46 | 4165 | goto out; |
195aefde | 4166 | data = TSS_BASE_SIZE + TSS_REDIRECTION_SIZE; |
464d17c8 SY |
4167 | r = kvm_write_guest_page(kvm, fn++, &data, |
4168 | TSS_IOPB_BASE_OFFSET, sizeof(u16)); | |
195aefde | 4169 | if (r < 0) |
10589a46 | 4170 | goto out; |
195aefde IE |
4171 | r = kvm_clear_guest_page(kvm, fn++, 0, PAGE_SIZE); |
4172 | if (r < 0) | |
10589a46 | 4173 | goto out; |
195aefde IE |
4174 | r = kvm_clear_guest_page(kvm, fn, 0, PAGE_SIZE); |
4175 | if (r < 0) | |
10589a46 | 4176 | goto out; |
195aefde | 4177 | data = ~0; |
10589a46 MT |
4178 | r = kvm_write_guest_page(kvm, fn, &data, |
4179 | RMODE_TSS_SIZE - 2 * PAGE_SIZE - 1, | |
4180 | sizeof(u8)); | |
10589a46 | 4181 | out: |
40dcaa9f | 4182 | srcu_read_unlock(&kvm->srcu, idx); |
1f755a82 | 4183 | return r; |
6aa8b732 AK |
4184 | } |
4185 | ||
b7ebfb05 SY |
4186 | static int init_rmode_identity_map(struct kvm *kvm) |
4187 | { | |
f51770ed | 4188 | int i, idx, r = 0; |
b7ebfb05 SY |
4189 | pfn_t identity_map_pfn; |
4190 | u32 tmp; | |
4191 | ||
089d034e | 4192 | if (!enable_ept) |
f51770ed | 4193 | return 0; |
a255d479 TC |
4194 | |
4195 | /* Protect kvm->arch.ept_identity_pagetable_done. */ | |
4196 | mutex_lock(&kvm->slots_lock); | |
4197 | ||
f51770ed | 4198 | if (likely(kvm->arch.ept_identity_pagetable_done)) |
a255d479 | 4199 | goto out2; |
a255d479 | 4200 | |
b927a3ce | 4201 | identity_map_pfn = kvm->arch.ept_identity_map_addr >> PAGE_SHIFT; |
a255d479 TC |
4202 | |
4203 | r = alloc_identity_pagetable(kvm); | |
f51770ed | 4204 | if (r < 0) |
a255d479 TC |
4205 | goto out2; |
4206 | ||
40dcaa9f | 4207 | idx = srcu_read_lock(&kvm->srcu); |
b7ebfb05 SY |
4208 | r = kvm_clear_guest_page(kvm, identity_map_pfn, 0, PAGE_SIZE); |
4209 | if (r < 0) | |
4210 | goto out; | |
4211 | /* Set up identity-mapping pagetable for EPT in real mode */ | |
4212 | for (i = 0; i < PT32_ENT_PER_PAGE; i++) { | |
4213 | tmp = (i << 22) + (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | | |
4214 | _PAGE_ACCESSED | _PAGE_DIRTY | _PAGE_PSE); | |
4215 | r = kvm_write_guest_page(kvm, identity_map_pfn, | |
4216 | &tmp, i * sizeof(tmp), sizeof(tmp)); | |
4217 | if (r < 0) | |
4218 | goto out; | |
4219 | } | |
4220 | kvm->arch.ept_identity_pagetable_done = true; | |
f51770ed | 4221 | |
b7ebfb05 | 4222 | out: |
40dcaa9f | 4223 | srcu_read_unlock(&kvm->srcu, idx); |
a255d479 TC |
4224 | |
4225 | out2: | |
4226 | mutex_unlock(&kvm->slots_lock); | |
f51770ed | 4227 | return r; |
b7ebfb05 SY |
4228 | } |
4229 | ||
6aa8b732 AK |
4230 | static void seg_setup(int seg) |
4231 | { | |
772e0318 | 4232 | const struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; |
3a624e29 | 4233 | unsigned int ar; |
6aa8b732 AK |
4234 | |
4235 | vmcs_write16(sf->selector, 0); | |
4236 | vmcs_writel(sf->base, 0); | |
4237 | vmcs_write32(sf->limit, 0xffff); | |
d54d07b2 GN |
4238 | ar = 0x93; |
4239 | if (seg == VCPU_SREG_CS) | |
4240 | ar |= 0x08; /* code segment */ | |
3a624e29 NK |
4241 | |
4242 | vmcs_write32(sf->ar_bytes, ar); | |
6aa8b732 AK |
4243 | } |
4244 | ||
f78e0e2e SY |
4245 | static int alloc_apic_access_page(struct kvm *kvm) |
4246 | { | |
4484141a | 4247 | struct page *page; |
f78e0e2e SY |
4248 | int r = 0; |
4249 | ||
79fac95e | 4250 | mutex_lock(&kvm->slots_lock); |
c24ae0dc | 4251 | if (kvm->arch.apic_access_page_done) |
f78e0e2e | 4252 | goto out; |
1d8007bd PB |
4253 | r = __x86_set_memory_region(kvm, APIC_ACCESS_PAGE_PRIVATE_MEMSLOT, |
4254 | APIC_DEFAULT_PHYS_BASE, PAGE_SIZE); | |
f78e0e2e SY |
4255 | if (r) |
4256 | goto out; | |
72dc67a6 | 4257 | |
73a6d941 | 4258 | page = gfn_to_page(kvm, APIC_DEFAULT_PHYS_BASE >> PAGE_SHIFT); |
4484141a XG |
4259 | if (is_error_page(page)) { |
4260 | r = -EFAULT; | |
4261 | goto out; | |
4262 | } | |
4263 | ||
c24ae0dc TC |
4264 | /* |
4265 | * Do not pin the page in memory, so that memory hot-unplug | |
4266 | * is able to migrate it. | |
4267 | */ | |
4268 | put_page(page); | |
4269 | kvm->arch.apic_access_page_done = true; | |
f78e0e2e | 4270 | out: |
79fac95e | 4271 | mutex_unlock(&kvm->slots_lock); |
f78e0e2e SY |
4272 | return r; |
4273 | } | |
4274 | ||
b7ebfb05 SY |
4275 | static int alloc_identity_pagetable(struct kvm *kvm) |
4276 | { | |
a255d479 TC |
4277 | /* Called with kvm->slots_lock held. */ |
4278 | ||
b7ebfb05 SY |
4279 | int r = 0; |
4280 | ||
a255d479 TC |
4281 | BUG_ON(kvm->arch.ept_identity_pagetable_done); |
4282 | ||
1d8007bd PB |
4283 | r = __x86_set_memory_region(kvm, IDENTITY_PAGETABLE_PRIVATE_MEMSLOT, |
4284 | kvm->arch.ept_identity_map_addr, PAGE_SIZE); | |
b7ebfb05 | 4285 | |
b7ebfb05 SY |
4286 | return r; |
4287 | } | |
4288 | ||
991e7a0e | 4289 | static int allocate_vpid(void) |
2384d2b3 SY |
4290 | { |
4291 | int vpid; | |
4292 | ||
919818ab | 4293 | if (!enable_vpid) |
991e7a0e | 4294 | return 0; |
2384d2b3 SY |
4295 | spin_lock(&vmx_vpid_lock); |
4296 | vpid = find_first_zero_bit(vmx_vpid_bitmap, VMX_NR_VPIDS); | |
991e7a0e | 4297 | if (vpid < VMX_NR_VPIDS) |
2384d2b3 | 4298 | __set_bit(vpid, vmx_vpid_bitmap); |
991e7a0e WL |
4299 | else |
4300 | vpid = 0; | |
2384d2b3 | 4301 | spin_unlock(&vmx_vpid_lock); |
991e7a0e | 4302 | return vpid; |
2384d2b3 SY |
4303 | } |
4304 | ||
991e7a0e | 4305 | static void free_vpid(int vpid) |
cdbecfc3 | 4306 | { |
991e7a0e | 4307 | if (!enable_vpid || vpid == 0) |
cdbecfc3 LJ |
4308 | return; |
4309 | spin_lock(&vmx_vpid_lock); | |
991e7a0e | 4310 | __clear_bit(vpid, vmx_vpid_bitmap); |
cdbecfc3 LJ |
4311 | spin_unlock(&vmx_vpid_lock); |
4312 | } | |
4313 | ||
8d14695f YZ |
4314 | #define MSR_TYPE_R 1 |
4315 | #define MSR_TYPE_W 2 | |
4316 | static void __vmx_disable_intercept_for_msr(unsigned long *msr_bitmap, | |
4317 | u32 msr, int type) | |
25c5f225 | 4318 | { |
3e7c73e9 | 4319 | int f = sizeof(unsigned long); |
25c5f225 SY |
4320 | |
4321 | if (!cpu_has_vmx_msr_bitmap()) | |
4322 | return; | |
4323 | ||
4324 | /* | |
4325 | * See Intel PRM Vol. 3, 20.6.9 (MSR-Bitmap Address). Early manuals | |
4326 | * have the write-low and read-high bitmap offsets the wrong way round. | |
4327 | * We can control MSRs 0x00000000-0x00001fff and 0xc0000000-0xc0001fff. | |
4328 | */ | |
25c5f225 | 4329 | if (msr <= 0x1fff) { |
8d14695f YZ |
4330 | if (type & MSR_TYPE_R) |
4331 | /* read-low */ | |
4332 | __clear_bit(msr, msr_bitmap + 0x000 / f); | |
4333 | ||
4334 | if (type & MSR_TYPE_W) | |
4335 | /* write-low */ | |
4336 | __clear_bit(msr, msr_bitmap + 0x800 / f); | |
4337 | ||
25c5f225 SY |
4338 | } else if ((msr >= 0xc0000000) && (msr <= 0xc0001fff)) { |
4339 | msr &= 0x1fff; | |
8d14695f YZ |
4340 | if (type & MSR_TYPE_R) |
4341 | /* read-high */ | |
4342 | __clear_bit(msr, msr_bitmap + 0x400 / f); | |
4343 | ||
4344 | if (type & MSR_TYPE_W) | |
4345 | /* write-high */ | |
4346 | __clear_bit(msr, msr_bitmap + 0xc00 / f); | |
4347 | ||
4348 | } | |
4349 | } | |
4350 | ||
4351 | static void __vmx_enable_intercept_for_msr(unsigned long *msr_bitmap, | |
4352 | u32 msr, int type) | |
4353 | { | |
4354 | int f = sizeof(unsigned long); | |
4355 | ||
4356 | if (!cpu_has_vmx_msr_bitmap()) | |
4357 | return; | |
4358 | ||
4359 | /* | |
4360 | * See Intel PRM Vol. 3, 20.6.9 (MSR-Bitmap Address). Early manuals | |
4361 | * have the write-low and read-high bitmap offsets the wrong way round. | |
4362 | * We can control MSRs 0x00000000-0x00001fff and 0xc0000000-0xc0001fff. | |
4363 | */ | |
4364 | if (msr <= 0x1fff) { | |
4365 | if (type & MSR_TYPE_R) | |
4366 | /* read-low */ | |
4367 | __set_bit(msr, msr_bitmap + 0x000 / f); | |
4368 | ||
4369 | if (type & MSR_TYPE_W) | |
4370 | /* write-low */ | |
4371 | __set_bit(msr, msr_bitmap + 0x800 / f); | |
4372 | ||
4373 | } else if ((msr >= 0xc0000000) && (msr <= 0xc0001fff)) { | |
4374 | msr &= 0x1fff; | |
4375 | if (type & MSR_TYPE_R) | |
4376 | /* read-high */ | |
4377 | __set_bit(msr, msr_bitmap + 0x400 / f); | |
4378 | ||
4379 | if (type & MSR_TYPE_W) | |
4380 | /* write-high */ | |
4381 | __set_bit(msr, msr_bitmap + 0xc00 / f); | |
4382 | ||
25c5f225 | 4383 | } |
25c5f225 SY |
4384 | } |
4385 | ||
f2b93280 WV |
4386 | /* |
4387 | * If a msr is allowed by L0, we should check whether it is allowed by L1. | |
4388 | * The corresponding bit will be cleared unless both of L0 and L1 allow it. | |
4389 | */ | |
4390 | static void nested_vmx_disable_intercept_for_msr(unsigned long *msr_bitmap_l1, | |
4391 | unsigned long *msr_bitmap_nested, | |
4392 | u32 msr, int type) | |
4393 | { | |
4394 | int f = sizeof(unsigned long); | |
4395 | ||
4396 | if (!cpu_has_vmx_msr_bitmap()) { | |
4397 | WARN_ON(1); | |
4398 | return; | |
4399 | } | |
4400 | ||
4401 | /* | |
4402 | * See Intel PRM Vol. 3, 20.6.9 (MSR-Bitmap Address). Early manuals | |
4403 | * have the write-low and read-high bitmap offsets the wrong way round. | |
4404 | * We can control MSRs 0x00000000-0x00001fff and 0xc0000000-0xc0001fff. | |
4405 | */ | |
4406 | if (msr <= 0x1fff) { | |
4407 | if (type & MSR_TYPE_R && | |
4408 | !test_bit(msr, msr_bitmap_l1 + 0x000 / f)) | |
4409 | /* read-low */ | |
4410 | __clear_bit(msr, msr_bitmap_nested + 0x000 / f); | |
4411 | ||
4412 | if (type & MSR_TYPE_W && | |
4413 | !test_bit(msr, msr_bitmap_l1 + 0x800 / f)) | |
4414 | /* write-low */ | |
4415 | __clear_bit(msr, msr_bitmap_nested + 0x800 / f); | |
4416 | ||
4417 | } else if ((msr >= 0xc0000000) && (msr <= 0xc0001fff)) { | |
4418 | msr &= 0x1fff; | |
4419 | if (type & MSR_TYPE_R && | |
4420 | !test_bit(msr, msr_bitmap_l1 + 0x400 / f)) | |
4421 | /* read-high */ | |
4422 | __clear_bit(msr, msr_bitmap_nested + 0x400 / f); | |
4423 | ||
4424 | if (type & MSR_TYPE_W && | |
4425 | !test_bit(msr, msr_bitmap_l1 + 0xc00 / f)) | |
4426 | /* write-high */ | |
4427 | __clear_bit(msr, msr_bitmap_nested + 0xc00 / f); | |
4428 | ||
4429 | } | |
4430 | } | |
4431 | ||
5897297b AK |
4432 | static void vmx_disable_intercept_for_msr(u32 msr, bool longmode_only) |
4433 | { | |
4434 | if (!longmode_only) | |
8d14695f YZ |
4435 | __vmx_disable_intercept_for_msr(vmx_msr_bitmap_legacy, |
4436 | msr, MSR_TYPE_R | MSR_TYPE_W); | |
4437 | __vmx_disable_intercept_for_msr(vmx_msr_bitmap_longmode, | |
4438 | msr, MSR_TYPE_R | MSR_TYPE_W); | |
4439 | } | |
4440 | ||
4441 | static void vmx_enable_intercept_msr_read_x2apic(u32 msr) | |
4442 | { | |
4443 | __vmx_enable_intercept_for_msr(vmx_msr_bitmap_legacy_x2apic, | |
4444 | msr, MSR_TYPE_R); | |
4445 | __vmx_enable_intercept_for_msr(vmx_msr_bitmap_longmode_x2apic, | |
4446 | msr, MSR_TYPE_R); | |
4447 | } | |
4448 | ||
4449 | static void vmx_disable_intercept_msr_read_x2apic(u32 msr) | |
4450 | { | |
4451 | __vmx_disable_intercept_for_msr(vmx_msr_bitmap_legacy_x2apic, | |
4452 | msr, MSR_TYPE_R); | |
4453 | __vmx_disable_intercept_for_msr(vmx_msr_bitmap_longmode_x2apic, | |
4454 | msr, MSR_TYPE_R); | |
4455 | } | |
4456 | ||
4457 | static void vmx_disable_intercept_msr_write_x2apic(u32 msr) | |
4458 | { | |
4459 | __vmx_disable_intercept_for_msr(vmx_msr_bitmap_legacy_x2apic, | |
4460 | msr, MSR_TYPE_W); | |
4461 | __vmx_disable_intercept_for_msr(vmx_msr_bitmap_longmode_x2apic, | |
4462 | msr, MSR_TYPE_W); | |
5897297b AK |
4463 | } |
4464 | ||
d50ab6c1 PB |
4465 | static int vmx_cpu_uses_apicv(struct kvm_vcpu *vcpu) |
4466 | { | |
35754c98 | 4467 | return enable_apicv && lapic_in_kernel(vcpu); |
d50ab6c1 PB |
4468 | } |
4469 | ||
705699a1 WV |
4470 | static int vmx_complete_nested_posted_interrupt(struct kvm_vcpu *vcpu) |
4471 | { | |
4472 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
4473 | int max_irr; | |
4474 | void *vapic_page; | |
4475 | u16 status; | |
4476 | ||
4477 | if (vmx->nested.pi_desc && | |
4478 | vmx->nested.pi_pending) { | |
4479 | vmx->nested.pi_pending = false; | |
4480 | if (!pi_test_and_clear_on(vmx->nested.pi_desc)) | |
4481 | return 0; | |
4482 | ||
4483 | max_irr = find_last_bit( | |
4484 | (unsigned long *)vmx->nested.pi_desc->pir, 256); | |
4485 | ||
4486 | if (max_irr == 256) | |
4487 | return 0; | |
4488 | ||
4489 | vapic_page = kmap(vmx->nested.virtual_apic_page); | |
4490 | if (!vapic_page) { | |
4491 | WARN_ON(1); | |
4492 | return -ENOMEM; | |
4493 | } | |
4494 | __kvm_apic_update_irr(vmx->nested.pi_desc->pir, vapic_page); | |
4495 | kunmap(vmx->nested.virtual_apic_page); | |
4496 | ||
4497 | status = vmcs_read16(GUEST_INTR_STATUS); | |
4498 | if ((u8)max_irr > ((u8)status & 0xff)) { | |
4499 | status &= ~0xff; | |
4500 | status |= (u8)max_irr; | |
4501 | vmcs_write16(GUEST_INTR_STATUS, status); | |
4502 | } | |
4503 | } | |
4504 | return 0; | |
4505 | } | |
4506 | ||
21bc8dc5 RK |
4507 | static inline bool kvm_vcpu_trigger_posted_interrupt(struct kvm_vcpu *vcpu) |
4508 | { | |
4509 | #ifdef CONFIG_SMP | |
4510 | if (vcpu->mode == IN_GUEST_MODE) { | |
28b835d6 FW |
4511 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
4512 | ||
4513 | /* | |
4514 | * Currently, we don't support urgent interrupt, | |
4515 | * all interrupts are recognized as non-urgent | |
4516 | * interrupt, so we cannot post interrupts when | |
4517 | * 'SN' is set. | |
4518 | * | |
4519 | * If the vcpu is in guest mode, it means it is | |
4520 | * running instead of being scheduled out and | |
4521 | * waiting in the run queue, and that's the only | |
4522 | * case when 'SN' is set currently, warning if | |
4523 | * 'SN' is set. | |
4524 | */ | |
4525 | WARN_ON_ONCE(pi_test_sn(&vmx->pi_desc)); | |
4526 | ||
21bc8dc5 RK |
4527 | apic->send_IPI_mask(get_cpu_mask(vcpu->cpu), |
4528 | POSTED_INTR_VECTOR); | |
4529 | return true; | |
4530 | } | |
4531 | #endif | |
4532 | return false; | |
4533 | } | |
4534 | ||
705699a1 WV |
4535 | static int vmx_deliver_nested_posted_interrupt(struct kvm_vcpu *vcpu, |
4536 | int vector) | |
4537 | { | |
4538 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
4539 | ||
4540 | if (is_guest_mode(vcpu) && | |
4541 | vector == vmx->nested.posted_intr_nv) { | |
4542 | /* the PIR and ON have been set by L1. */ | |
21bc8dc5 | 4543 | kvm_vcpu_trigger_posted_interrupt(vcpu); |
705699a1 WV |
4544 | /* |
4545 | * If a posted intr is not recognized by hardware, | |
4546 | * we will accomplish it in the next vmentry. | |
4547 | */ | |
4548 | vmx->nested.pi_pending = true; | |
4549 | kvm_make_request(KVM_REQ_EVENT, vcpu); | |
4550 | return 0; | |
4551 | } | |
4552 | return -1; | |
4553 | } | |
a20ed54d YZ |
4554 | /* |
4555 | * Send interrupt to vcpu via posted interrupt way. | |
4556 | * 1. If target vcpu is running(non-root mode), send posted interrupt | |
4557 | * notification to vcpu and hardware will sync PIR to vIRR atomically. | |
4558 | * 2. If target vcpu isn't running(root mode), kick it to pick up the | |
4559 | * interrupt from PIR in next vmentry. | |
4560 | */ | |
4561 | static void vmx_deliver_posted_interrupt(struct kvm_vcpu *vcpu, int vector) | |
4562 | { | |
4563 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
4564 | int r; | |
4565 | ||
705699a1 WV |
4566 | r = vmx_deliver_nested_posted_interrupt(vcpu, vector); |
4567 | if (!r) | |
4568 | return; | |
4569 | ||
a20ed54d YZ |
4570 | if (pi_test_and_set_pir(vector, &vmx->pi_desc)) |
4571 | return; | |
4572 | ||
4573 | r = pi_test_and_set_on(&vmx->pi_desc); | |
4574 | kvm_make_request(KVM_REQ_EVENT, vcpu); | |
21bc8dc5 | 4575 | if (r || !kvm_vcpu_trigger_posted_interrupt(vcpu)) |
a20ed54d YZ |
4576 | kvm_vcpu_kick(vcpu); |
4577 | } | |
4578 | ||
4579 | static void vmx_sync_pir_to_irr(struct kvm_vcpu *vcpu) | |
4580 | { | |
4581 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
4582 | ||
4583 | if (!pi_test_and_clear_on(&vmx->pi_desc)) | |
4584 | return; | |
4585 | ||
4586 | kvm_apic_update_irr(vcpu, vmx->pi_desc.pir); | |
4587 | } | |
4588 | ||
4589 | static void vmx_sync_pir_to_irr_dummy(struct kvm_vcpu *vcpu) | |
4590 | { | |
4591 | return; | |
4592 | } | |
4593 | ||
a3a8ff8e NHE |
4594 | /* |
4595 | * Set up the vmcs's constant host-state fields, i.e., host-state fields that | |
4596 | * will not change in the lifetime of the guest. | |
4597 | * Note that host-state that does change is set elsewhere. E.g., host-state | |
4598 | * that is set differently for each CPU is set in vmx_vcpu_load(), not here. | |
4599 | */ | |
a547c6db | 4600 | static void vmx_set_constant_host_state(struct vcpu_vmx *vmx) |
a3a8ff8e NHE |
4601 | { |
4602 | u32 low32, high32; | |
4603 | unsigned long tmpl; | |
4604 | struct desc_ptr dt; | |
d974baa3 | 4605 | unsigned long cr4; |
a3a8ff8e | 4606 | |
b1a74bf8 | 4607 | vmcs_writel(HOST_CR0, read_cr0() & ~X86_CR0_TS); /* 22.2.3 */ |
a3a8ff8e NHE |
4608 | vmcs_writel(HOST_CR3, read_cr3()); /* 22.2.3 FIXME: shadow tables */ |
4609 | ||
d974baa3 | 4610 | /* Save the most likely value for this task's CR4 in the VMCS. */ |
1e02ce4c | 4611 | cr4 = cr4_read_shadow(); |
d974baa3 AL |
4612 | vmcs_writel(HOST_CR4, cr4); /* 22.2.3, 22.2.5 */ |
4613 | vmx->host_state.vmcs_host_cr4 = cr4; | |
4614 | ||
a3a8ff8e | 4615 | vmcs_write16(HOST_CS_SELECTOR, __KERNEL_CS); /* 22.2.4 */ |
b2da15ac AK |
4616 | #ifdef CONFIG_X86_64 |
4617 | /* | |
4618 | * Load null selectors, so we can avoid reloading them in | |
4619 | * __vmx_load_host_state(), in case userspace uses the null selectors | |
4620 | * too (the expected case). | |
4621 | */ | |
4622 | vmcs_write16(HOST_DS_SELECTOR, 0); | |
4623 | vmcs_write16(HOST_ES_SELECTOR, 0); | |
4624 | #else | |
a3a8ff8e NHE |
4625 | vmcs_write16(HOST_DS_SELECTOR, __KERNEL_DS); /* 22.2.4 */ |
4626 | vmcs_write16(HOST_ES_SELECTOR, __KERNEL_DS); /* 22.2.4 */ | |
b2da15ac | 4627 | #endif |
a3a8ff8e NHE |
4628 | vmcs_write16(HOST_SS_SELECTOR, __KERNEL_DS); /* 22.2.4 */ |
4629 | vmcs_write16(HOST_TR_SELECTOR, GDT_ENTRY_TSS*8); /* 22.2.4 */ | |
4630 | ||
4631 | native_store_idt(&dt); | |
4632 | vmcs_writel(HOST_IDTR_BASE, dt.address); /* 22.2.4 */ | |
a547c6db | 4633 | vmx->host_idt_base = dt.address; |
a3a8ff8e | 4634 | |
83287ea4 | 4635 | vmcs_writel(HOST_RIP, vmx_return); /* 22.2.5 */ |
a3a8ff8e NHE |
4636 | |
4637 | rdmsr(MSR_IA32_SYSENTER_CS, low32, high32); | |
4638 | vmcs_write32(HOST_IA32_SYSENTER_CS, low32); | |
4639 | rdmsrl(MSR_IA32_SYSENTER_EIP, tmpl); | |
4640 | vmcs_writel(HOST_IA32_SYSENTER_EIP, tmpl); /* 22.2.3 */ | |
4641 | ||
4642 | if (vmcs_config.vmexit_ctrl & VM_EXIT_LOAD_IA32_PAT) { | |
4643 | rdmsr(MSR_IA32_CR_PAT, low32, high32); | |
4644 | vmcs_write64(HOST_IA32_PAT, low32 | ((u64) high32 << 32)); | |
4645 | } | |
4646 | } | |
4647 | ||
bf8179a0 NHE |
4648 | static void set_cr4_guest_host_mask(struct vcpu_vmx *vmx) |
4649 | { | |
4650 | vmx->vcpu.arch.cr4_guest_owned_bits = KVM_CR4_GUEST_OWNED_BITS; | |
4651 | if (enable_ept) | |
4652 | vmx->vcpu.arch.cr4_guest_owned_bits |= X86_CR4_PGE; | |
fe3ef05c NHE |
4653 | if (is_guest_mode(&vmx->vcpu)) |
4654 | vmx->vcpu.arch.cr4_guest_owned_bits &= | |
4655 | ~get_vmcs12(&vmx->vcpu)->cr4_guest_host_mask; | |
bf8179a0 NHE |
4656 | vmcs_writel(CR4_GUEST_HOST_MASK, ~vmx->vcpu.arch.cr4_guest_owned_bits); |
4657 | } | |
4658 | ||
01e439be YZ |
4659 | static u32 vmx_pin_based_exec_ctrl(struct vcpu_vmx *vmx) |
4660 | { | |
4661 | u32 pin_based_exec_ctrl = vmcs_config.pin_based_exec_ctrl; | |
4662 | ||
35754c98 | 4663 | if (!vmx_cpu_uses_apicv(&vmx->vcpu)) |
01e439be YZ |
4664 | pin_based_exec_ctrl &= ~PIN_BASED_POSTED_INTR; |
4665 | return pin_based_exec_ctrl; | |
4666 | } | |
4667 | ||
bf8179a0 NHE |
4668 | static u32 vmx_exec_control(struct vcpu_vmx *vmx) |
4669 | { | |
4670 | u32 exec_control = vmcs_config.cpu_based_exec_ctrl; | |
d16c293e PB |
4671 | |
4672 | if (vmx->vcpu.arch.switch_db_regs & KVM_DEBUGREG_WONT_EXIT) | |
4673 | exec_control &= ~CPU_BASED_MOV_DR_EXITING; | |
4674 | ||
35754c98 | 4675 | if (!cpu_need_tpr_shadow(&vmx->vcpu)) { |
bf8179a0 NHE |
4676 | exec_control &= ~CPU_BASED_TPR_SHADOW; |
4677 | #ifdef CONFIG_X86_64 | |
4678 | exec_control |= CPU_BASED_CR8_STORE_EXITING | | |
4679 | CPU_BASED_CR8_LOAD_EXITING; | |
4680 | #endif | |
4681 | } | |
4682 | if (!enable_ept) | |
4683 | exec_control |= CPU_BASED_CR3_STORE_EXITING | | |
4684 | CPU_BASED_CR3_LOAD_EXITING | | |
4685 | CPU_BASED_INVLPG_EXITING; | |
4686 | return exec_control; | |
4687 | } | |
4688 | ||
4689 | static u32 vmx_secondary_exec_control(struct vcpu_vmx *vmx) | |
4690 | { | |
4691 | u32 exec_control = vmcs_config.cpu_based_2nd_exec_ctrl; | |
35754c98 | 4692 | if (!cpu_need_virtualize_apic_accesses(&vmx->vcpu)) |
bf8179a0 NHE |
4693 | exec_control &= ~SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES; |
4694 | if (vmx->vpid == 0) | |
4695 | exec_control &= ~SECONDARY_EXEC_ENABLE_VPID; | |
4696 | if (!enable_ept) { | |
4697 | exec_control &= ~SECONDARY_EXEC_ENABLE_EPT; | |
4698 | enable_unrestricted_guest = 0; | |
ad756a16 MJ |
4699 | /* Enable INVPCID for non-ept guests may cause performance regression. */ |
4700 | exec_control &= ~SECONDARY_EXEC_ENABLE_INVPCID; | |
bf8179a0 NHE |
4701 | } |
4702 | if (!enable_unrestricted_guest) | |
4703 | exec_control &= ~SECONDARY_EXEC_UNRESTRICTED_GUEST; | |
4704 | if (!ple_gap) | |
4705 | exec_control &= ~SECONDARY_EXEC_PAUSE_LOOP_EXITING; | |
35754c98 | 4706 | if (!vmx_cpu_uses_apicv(&vmx->vcpu)) |
c7c9c56c YZ |
4707 | exec_control &= ~(SECONDARY_EXEC_APIC_REGISTER_VIRT | |
4708 | SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY); | |
8d14695f | 4709 | exec_control &= ~SECONDARY_EXEC_VIRTUALIZE_X2APIC_MODE; |
abc4fc58 AG |
4710 | /* SECONDARY_EXEC_SHADOW_VMCS is enabled when L1 executes VMPTRLD |
4711 | (handle_vmptrld). | |
4712 | We can NOT enable shadow_vmcs here because we don't have yet | |
4713 | a current VMCS12 | |
4714 | */ | |
4715 | exec_control &= ~SECONDARY_EXEC_SHADOW_VMCS; | |
a3eaa864 KH |
4716 | |
4717 | if (!enable_pml) | |
4718 | exec_control &= ~SECONDARY_EXEC_ENABLE_PML; | |
843e4330 | 4719 | |
8b3e34e4 XG |
4720 | /* Currently, we allow L1 guest to directly run pcommit instruction. */ |
4721 | exec_control &= ~SECONDARY_EXEC_PCOMMIT; | |
4722 | ||
bf8179a0 NHE |
4723 | return exec_control; |
4724 | } | |
4725 | ||
ce88decf XG |
4726 | static void ept_set_mmio_spte_mask(void) |
4727 | { | |
4728 | /* | |
4729 | * EPT Misconfigurations can be generated if the value of bits 2:0 | |
4730 | * of an EPT paging-structure entry is 110b (write/execute). | |
885032b9 | 4731 | * Also, magic bits (0x3ull << 62) is set to quickly identify mmio |
ce88decf XG |
4732 | * spte. |
4733 | */ | |
885032b9 | 4734 | kvm_mmu_set_mmio_spte_mask((0x3ull << 62) | 0x6ull); |
ce88decf XG |
4735 | } |
4736 | ||
f53cd63c | 4737 | #define VMX_XSS_EXIT_BITMAP 0 |
6aa8b732 AK |
4738 | /* |
4739 | * Sets up the vmcs for emulated real mode. | |
4740 | */ | |
8b9cf98c | 4741 | static int vmx_vcpu_setup(struct vcpu_vmx *vmx) |
6aa8b732 | 4742 | { |
2e4ce7f5 | 4743 | #ifdef CONFIG_X86_64 |
6aa8b732 | 4744 | unsigned long a; |
2e4ce7f5 | 4745 | #endif |
6aa8b732 | 4746 | int i; |
6aa8b732 | 4747 | |
6aa8b732 | 4748 | /* I/O */ |
3e7c73e9 AK |
4749 | vmcs_write64(IO_BITMAP_A, __pa(vmx_io_bitmap_a)); |
4750 | vmcs_write64(IO_BITMAP_B, __pa(vmx_io_bitmap_b)); | |
6aa8b732 | 4751 | |
4607c2d7 AG |
4752 | if (enable_shadow_vmcs) { |
4753 | vmcs_write64(VMREAD_BITMAP, __pa(vmx_vmread_bitmap)); | |
4754 | vmcs_write64(VMWRITE_BITMAP, __pa(vmx_vmwrite_bitmap)); | |
4755 | } | |
25c5f225 | 4756 | if (cpu_has_vmx_msr_bitmap()) |
5897297b | 4757 | vmcs_write64(MSR_BITMAP, __pa(vmx_msr_bitmap_legacy)); |
25c5f225 | 4758 | |
6aa8b732 AK |
4759 | vmcs_write64(VMCS_LINK_POINTER, -1ull); /* 22.3.1.5 */ |
4760 | ||
6aa8b732 | 4761 | /* Control */ |
01e439be | 4762 | vmcs_write32(PIN_BASED_VM_EXEC_CONTROL, vmx_pin_based_exec_ctrl(vmx)); |
6e5d865c | 4763 | |
bf8179a0 | 4764 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, vmx_exec_control(vmx)); |
6aa8b732 | 4765 | |
8b3e34e4 | 4766 | if (cpu_has_secondary_exec_ctrls()) |
bf8179a0 NHE |
4767 | vmcs_write32(SECONDARY_VM_EXEC_CONTROL, |
4768 | vmx_secondary_exec_control(vmx)); | |
f78e0e2e | 4769 | |
35754c98 | 4770 | if (vmx_cpu_uses_apicv(&vmx->vcpu)) { |
c7c9c56c YZ |
4771 | vmcs_write64(EOI_EXIT_BITMAP0, 0); |
4772 | vmcs_write64(EOI_EXIT_BITMAP1, 0); | |
4773 | vmcs_write64(EOI_EXIT_BITMAP2, 0); | |
4774 | vmcs_write64(EOI_EXIT_BITMAP3, 0); | |
4775 | ||
4776 | vmcs_write16(GUEST_INTR_STATUS, 0); | |
01e439be YZ |
4777 | |
4778 | vmcs_write64(POSTED_INTR_NV, POSTED_INTR_VECTOR); | |
4779 | vmcs_write64(POSTED_INTR_DESC_ADDR, __pa((&vmx->pi_desc))); | |
c7c9c56c YZ |
4780 | } |
4781 | ||
4b8d54f9 ZE |
4782 | if (ple_gap) { |
4783 | vmcs_write32(PLE_GAP, ple_gap); | |
a7653ecd RK |
4784 | vmx->ple_window = ple_window; |
4785 | vmx->ple_window_dirty = true; | |
4b8d54f9 ZE |
4786 | } |
4787 | ||
c3707958 XG |
4788 | vmcs_write32(PAGE_FAULT_ERROR_CODE_MASK, 0); |
4789 | vmcs_write32(PAGE_FAULT_ERROR_CODE_MATCH, 0); | |
6aa8b732 AK |
4790 | vmcs_write32(CR3_TARGET_COUNT, 0); /* 22.2.1 */ |
4791 | ||
9581d442 AK |
4792 | vmcs_write16(HOST_FS_SELECTOR, 0); /* 22.2.4 */ |
4793 | vmcs_write16(HOST_GS_SELECTOR, 0); /* 22.2.4 */ | |
a547c6db | 4794 | vmx_set_constant_host_state(vmx); |
05b3e0c2 | 4795 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
4796 | rdmsrl(MSR_FS_BASE, a); |
4797 | vmcs_writel(HOST_FS_BASE, a); /* 22.2.4 */ | |
4798 | rdmsrl(MSR_GS_BASE, a); | |
4799 | vmcs_writel(HOST_GS_BASE, a); /* 22.2.4 */ | |
4800 | #else | |
4801 | vmcs_writel(HOST_FS_BASE, 0); /* 22.2.4 */ | |
4802 | vmcs_writel(HOST_GS_BASE, 0); /* 22.2.4 */ | |
4803 | #endif | |
4804 | ||
2cc51560 ED |
4805 | vmcs_write32(VM_EXIT_MSR_STORE_COUNT, 0); |
4806 | vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, 0); | |
61d2ef2c | 4807 | vmcs_write64(VM_EXIT_MSR_LOAD_ADDR, __pa(vmx->msr_autoload.host)); |
2cc51560 | 4808 | vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, 0); |
61d2ef2c | 4809 | vmcs_write64(VM_ENTRY_MSR_LOAD_ADDR, __pa(vmx->msr_autoload.guest)); |
6aa8b732 | 4810 | |
74545705 RK |
4811 | if (vmcs_config.vmentry_ctrl & VM_ENTRY_LOAD_IA32_PAT) |
4812 | vmcs_write64(GUEST_IA32_PAT, vmx->vcpu.arch.pat); | |
468d472f | 4813 | |
03916db9 | 4814 | for (i = 0; i < ARRAY_SIZE(vmx_msr_index); ++i) { |
6aa8b732 AK |
4815 | u32 index = vmx_msr_index[i]; |
4816 | u32 data_low, data_high; | |
a2fa3e9f | 4817 | int j = vmx->nmsrs; |
6aa8b732 AK |
4818 | |
4819 | if (rdmsr_safe(index, &data_low, &data_high) < 0) | |
4820 | continue; | |
432bd6cb AK |
4821 | if (wrmsr_safe(index, data_low, data_high) < 0) |
4822 | continue; | |
26bb0981 AK |
4823 | vmx->guest_msrs[j].index = i; |
4824 | vmx->guest_msrs[j].data = 0; | |
d5696725 | 4825 | vmx->guest_msrs[j].mask = -1ull; |
a2fa3e9f | 4826 | ++vmx->nmsrs; |
6aa8b732 | 4827 | } |
6aa8b732 | 4828 | |
2961e876 GN |
4829 | |
4830 | vm_exit_controls_init(vmx, vmcs_config.vmexit_ctrl); | |
6aa8b732 AK |
4831 | |
4832 | /* 22.2.1, 20.8.1 */ | |
2961e876 | 4833 | vm_entry_controls_init(vmx, vmcs_config.vmentry_ctrl); |
1c3d14fe | 4834 | |
e00c8cf2 | 4835 | vmcs_writel(CR0_GUEST_HOST_MASK, ~0UL); |
bf8179a0 | 4836 | set_cr4_guest_host_mask(vmx); |
e00c8cf2 | 4837 | |
f53cd63c WL |
4838 | if (vmx_xsaves_supported()) |
4839 | vmcs_write64(XSS_EXIT_BITMAP, VMX_XSS_EXIT_BITMAP); | |
4840 | ||
e00c8cf2 AK |
4841 | return 0; |
4842 | } | |
4843 | ||
d28bc9dd | 4844 | static void vmx_vcpu_reset(struct kvm_vcpu *vcpu, bool init_event) |
e00c8cf2 AK |
4845 | { |
4846 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
58cb628d | 4847 | struct msr_data apic_base_msr; |
d28bc9dd | 4848 | u64 cr0; |
e00c8cf2 | 4849 | |
7ffd92c5 | 4850 | vmx->rmode.vm86_active = 0; |
e00c8cf2 | 4851 | |
3b86cd99 JK |
4852 | vmx->soft_vnmi_blocked = 0; |
4853 | ||
ad312c7c | 4854 | vmx->vcpu.arch.regs[VCPU_REGS_RDX] = get_rdx_init_val(); |
d28bc9dd NA |
4855 | kvm_set_cr8(vcpu, 0); |
4856 | ||
4857 | if (!init_event) { | |
4858 | apic_base_msr.data = APIC_DEFAULT_PHYS_BASE | | |
4859 | MSR_IA32_APICBASE_ENABLE; | |
4860 | if (kvm_vcpu_is_reset_bsp(vcpu)) | |
4861 | apic_base_msr.data |= MSR_IA32_APICBASE_BSP; | |
4862 | apic_base_msr.host_initiated = true; | |
4863 | kvm_set_apic_base(vcpu, &apic_base_msr); | |
4864 | } | |
e00c8cf2 | 4865 | |
2fb92db1 AK |
4866 | vmx_segment_cache_clear(vmx); |
4867 | ||
5706be0d | 4868 | seg_setup(VCPU_SREG_CS); |
66450a21 | 4869 | vmcs_write16(GUEST_CS_SELECTOR, 0xf000); |
04b66839 | 4870 | vmcs_write32(GUEST_CS_BASE, 0xffff0000); |
e00c8cf2 AK |
4871 | |
4872 | seg_setup(VCPU_SREG_DS); | |
4873 | seg_setup(VCPU_SREG_ES); | |
4874 | seg_setup(VCPU_SREG_FS); | |
4875 | seg_setup(VCPU_SREG_GS); | |
4876 | seg_setup(VCPU_SREG_SS); | |
4877 | ||
4878 | vmcs_write16(GUEST_TR_SELECTOR, 0); | |
4879 | vmcs_writel(GUEST_TR_BASE, 0); | |
4880 | vmcs_write32(GUEST_TR_LIMIT, 0xffff); | |
4881 | vmcs_write32(GUEST_TR_AR_BYTES, 0x008b); | |
4882 | ||
4883 | vmcs_write16(GUEST_LDTR_SELECTOR, 0); | |
4884 | vmcs_writel(GUEST_LDTR_BASE, 0); | |
4885 | vmcs_write32(GUEST_LDTR_LIMIT, 0xffff); | |
4886 | vmcs_write32(GUEST_LDTR_AR_BYTES, 0x00082); | |
4887 | ||
d28bc9dd NA |
4888 | if (!init_event) { |
4889 | vmcs_write32(GUEST_SYSENTER_CS, 0); | |
4890 | vmcs_writel(GUEST_SYSENTER_ESP, 0); | |
4891 | vmcs_writel(GUEST_SYSENTER_EIP, 0); | |
4892 | vmcs_write64(GUEST_IA32_DEBUGCTL, 0); | |
4893 | } | |
e00c8cf2 AK |
4894 | |
4895 | vmcs_writel(GUEST_RFLAGS, 0x02); | |
66450a21 | 4896 | kvm_rip_write(vcpu, 0xfff0); |
e00c8cf2 | 4897 | |
e00c8cf2 AK |
4898 | vmcs_writel(GUEST_GDTR_BASE, 0); |
4899 | vmcs_write32(GUEST_GDTR_LIMIT, 0xffff); | |
4900 | ||
4901 | vmcs_writel(GUEST_IDTR_BASE, 0); | |
4902 | vmcs_write32(GUEST_IDTR_LIMIT, 0xffff); | |
4903 | ||
443381a8 | 4904 | vmcs_write32(GUEST_ACTIVITY_STATE, GUEST_ACTIVITY_ACTIVE); |
e00c8cf2 AK |
4905 | vmcs_write32(GUEST_INTERRUPTIBILITY_INFO, 0); |
4906 | vmcs_write32(GUEST_PENDING_DBG_EXCEPTIONS, 0); | |
4907 | ||
e00c8cf2 AK |
4908 | setup_msrs(vmx); |
4909 | ||
6aa8b732 AK |
4910 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, 0); /* 22.2.1 */ |
4911 | ||
d28bc9dd | 4912 | if (cpu_has_vmx_tpr_shadow() && !init_event) { |
f78e0e2e | 4913 | vmcs_write64(VIRTUAL_APIC_PAGE_ADDR, 0); |
35754c98 | 4914 | if (cpu_need_tpr_shadow(vcpu)) |
f78e0e2e | 4915 | vmcs_write64(VIRTUAL_APIC_PAGE_ADDR, |
d28bc9dd | 4916 | __pa(vcpu->arch.apic->regs)); |
f78e0e2e SY |
4917 | vmcs_write32(TPR_THRESHOLD, 0); |
4918 | } | |
4919 | ||
a73896cb | 4920 | kvm_make_request(KVM_REQ_APIC_PAGE_RELOAD, vcpu); |
6aa8b732 | 4921 | |
35754c98 | 4922 | if (vmx_cpu_uses_apicv(vcpu)) |
01e439be YZ |
4923 | memset(&vmx->pi_desc, 0, sizeof(struct pi_desc)); |
4924 | ||
2384d2b3 SY |
4925 | if (vmx->vpid != 0) |
4926 | vmcs_write16(VIRTUAL_PROCESSOR_ID, vmx->vpid); | |
4927 | ||
d28bc9dd NA |
4928 | cr0 = X86_CR0_NW | X86_CR0_CD | X86_CR0_ET; |
4929 | vmx_set_cr0(vcpu, cr0); /* enter rmode */ | |
4930 | vmx->vcpu.arch.cr0 = cr0; | |
4931 | vmx_set_cr4(vcpu, 0); | |
5690891b | 4932 | vmx_set_efer(vcpu, 0); |
d28bc9dd NA |
4933 | vmx_fpu_activate(vcpu); |
4934 | update_exception_bitmap(vcpu); | |
6aa8b732 | 4935 | |
dd5f5341 | 4936 | vpid_sync_context(vmx->vpid); |
6aa8b732 AK |
4937 | } |
4938 | ||
b6f1250e NHE |
4939 | /* |
4940 | * In nested virtualization, check if L1 asked to exit on external interrupts. | |
4941 | * For most existing hypervisors, this will always return true. | |
4942 | */ | |
4943 | static bool nested_exit_on_intr(struct kvm_vcpu *vcpu) | |
4944 | { | |
4945 | return get_vmcs12(vcpu)->pin_based_vm_exec_control & | |
4946 | PIN_BASED_EXT_INTR_MASK; | |
4947 | } | |
4948 | ||
77b0f5d6 BD |
4949 | /* |
4950 | * In nested virtualization, check if L1 has set | |
4951 | * VM_EXIT_ACK_INTR_ON_EXIT | |
4952 | */ | |
4953 | static bool nested_exit_intr_ack_set(struct kvm_vcpu *vcpu) | |
4954 | { | |
4955 | return get_vmcs12(vcpu)->vm_exit_controls & | |
4956 | VM_EXIT_ACK_INTR_ON_EXIT; | |
4957 | } | |
4958 | ||
ea8ceb83 JK |
4959 | static bool nested_exit_on_nmi(struct kvm_vcpu *vcpu) |
4960 | { | |
4961 | return get_vmcs12(vcpu)->pin_based_vm_exec_control & | |
4962 | PIN_BASED_NMI_EXITING; | |
4963 | } | |
4964 | ||
c9a7953f | 4965 | static void enable_irq_window(struct kvm_vcpu *vcpu) |
3b86cd99 JK |
4966 | { |
4967 | u32 cpu_based_vm_exec_control; | |
730dca42 | 4968 | |
3b86cd99 JK |
4969 | cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL); |
4970 | cpu_based_vm_exec_control |= CPU_BASED_VIRTUAL_INTR_PENDING; | |
4971 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control); | |
4972 | } | |
4973 | ||
c9a7953f | 4974 | static void enable_nmi_window(struct kvm_vcpu *vcpu) |
3b86cd99 JK |
4975 | { |
4976 | u32 cpu_based_vm_exec_control; | |
4977 | ||
c9a7953f JK |
4978 | if (!cpu_has_virtual_nmis() || |
4979 | vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & GUEST_INTR_STATE_STI) { | |
4980 | enable_irq_window(vcpu); | |
4981 | return; | |
4982 | } | |
3b86cd99 JK |
4983 | |
4984 | cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL); | |
4985 | cpu_based_vm_exec_control |= CPU_BASED_VIRTUAL_NMI_PENDING; | |
4986 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control); | |
4987 | } | |
4988 | ||
66fd3f7f | 4989 | static void vmx_inject_irq(struct kvm_vcpu *vcpu) |
85f455f7 | 4990 | { |
9c8cba37 | 4991 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
66fd3f7f GN |
4992 | uint32_t intr; |
4993 | int irq = vcpu->arch.interrupt.nr; | |
9c8cba37 | 4994 | |
229456fc | 4995 | trace_kvm_inj_virq(irq); |
2714d1d3 | 4996 | |
fa89a817 | 4997 | ++vcpu->stat.irq_injections; |
7ffd92c5 | 4998 | if (vmx->rmode.vm86_active) { |
71f9833b SH |
4999 | int inc_eip = 0; |
5000 | if (vcpu->arch.interrupt.soft) | |
5001 | inc_eip = vcpu->arch.event_exit_inst_len; | |
5002 | if (kvm_inject_realmode_interrupt(vcpu, irq, inc_eip) != EMULATE_DONE) | |
a92601bb | 5003 | kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu); |
85f455f7 ED |
5004 | return; |
5005 | } | |
66fd3f7f GN |
5006 | intr = irq | INTR_INFO_VALID_MASK; |
5007 | if (vcpu->arch.interrupt.soft) { | |
5008 | intr |= INTR_TYPE_SOFT_INTR; | |
5009 | vmcs_write32(VM_ENTRY_INSTRUCTION_LEN, | |
5010 | vmx->vcpu.arch.event_exit_inst_len); | |
5011 | } else | |
5012 | intr |= INTR_TYPE_EXT_INTR; | |
5013 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, intr); | |
85f455f7 ED |
5014 | } |
5015 | ||
f08864b4 SY |
5016 | static void vmx_inject_nmi(struct kvm_vcpu *vcpu) |
5017 | { | |
66a5a347 JK |
5018 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
5019 | ||
0b6ac343 NHE |
5020 | if (is_guest_mode(vcpu)) |
5021 | return; | |
5022 | ||
3b86cd99 JK |
5023 | if (!cpu_has_virtual_nmis()) { |
5024 | /* | |
5025 | * Tracking the NMI-blocked state in software is built upon | |
5026 | * finding the next open IRQ window. This, in turn, depends on | |
5027 | * well-behaving guests: They have to keep IRQs disabled at | |
5028 | * least as long as the NMI handler runs. Otherwise we may | |
5029 | * cause NMI nesting, maybe breaking the guest. But as this is | |
5030 | * highly unlikely, we can live with the residual risk. | |
5031 | */ | |
5032 | vmx->soft_vnmi_blocked = 1; | |
5033 | vmx->vnmi_blocked_time = 0; | |
5034 | } | |
5035 | ||
487b391d | 5036 | ++vcpu->stat.nmi_injections; |
9d58b931 | 5037 | vmx->nmi_known_unmasked = false; |
7ffd92c5 | 5038 | if (vmx->rmode.vm86_active) { |
71f9833b | 5039 | if (kvm_inject_realmode_interrupt(vcpu, NMI_VECTOR, 0) != EMULATE_DONE) |
a92601bb | 5040 | kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu); |
66a5a347 JK |
5041 | return; |
5042 | } | |
f08864b4 SY |
5043 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, |
5044 | INTR_TYPE_NMI_INTR | INTR_INFO_VALID_MASK | NMI_VECTOR); | |
f08864b4 SY |
5045 | } |
5046 | ||
3cfc3092 JK |
5047 | static bool vmx_get_nmi_mask(struct kvm_vcpu *vcpu) |
5048 | { | |
5049 | if (!cpu_has_virtual_nmis()) | |
5050 | return to_vmx(vcpu)->soft_vnmi_blocked; | |
9d58b931 AK |
5051 | if (to_vmx(vcpu)->nmi_known_unmasked) |
5052 | return false; | |
c332c83a | 5053 | return vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & GUEST_INTR_STATE_NMI; |
3cfc3092 JK |
5054 | } |
5055 | ||
5056 | static void vmx_set_nmi_mask(struct kvm_vcpu *vcpu, bool masked) | |
5057 | { | |
5058 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
5059 | ||
5060 | if (!cpu_has_virtual_nmis()) { | |
5061 | if (vmx->soft_vnmi_blocked != masked) { | |
5062 | vmx->soft_vnmi_blocked = masked; | |
5063 | vmx->vnmi_blocked_time = 0; | |
5064 | } | |
5065 | } else { | |
9d58b931 | 5066 | vmx->nmi_known_unmasked = !masked; |
3cfc3092 JK |
5067 | if (masked) |
5068 | vmcs_set_bits(GUEST_INTERRUPTIBILITY_INFO, | |
5069 | GUEST_INTR_STATE_NMI); | |
5070 | else | |
5071 | vmcs_clear_bits(GUEST_INTERRUPTIBILITY_INFO, | |
5072 | GUEST_INTR_STATE_NMI); | |
5073 | } | |
5074 | } | |
5075 | ||
2505dc9f JK |
5076 | static int vmx_nmi_allowed(struct kvm_vcpu *vcpu) |
5077 | { | |
b6b8a145 JK |
5078 | if (to_vmx(vcpu)->nested.nested_run_pending) |
5079 | return 0; | |
ea8ceb83 | 5080 | |
2505dc9f JK |
5081 | if (!cpu_has_virtual_nmis() && to_vmx(vcpu)->soft_vnmi_blocked) |
5082 | return 0; | |
5083 | ||
5084 | return !(vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & | |
5085 | (GUEST_INTR_STATE_MOV_SS | GUEST_INTR_STATE_STI | |
5086 | | GUEST_INTR_STATE_NMI)); | |
5087 | } | |
5088 | ||
78646121 GN |
5089 | static int vmx_interrupt_allowed(struct kvm_vcpu *vcpu) |
5090 | { | |
b6b8a145 JK |
5091 | return (!to_vmx(vcpu)->nested.nested_run_pending && |
5092 | vmcs_readl(GUEST_RFLAGS) & X86_EFLAGS_IF) && | |
c4282df9 GN |
5093 | !(vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & |
5094 | (GUEST_INTR_STATE_STI | GUEST_INTR_STATE_MOV_SS)); | |
78646121 GN |
5095 | } |
5096 | ||
cbc94022 IE |
5097 | static int vmx_set_tss_addr(struct kvm *kvm, unsigned int addr) |
5098 | { | |
5099 | int ret; | |
cbc94022 | 5100 | |
1d8007bd PB |
5101 | ret = x86_set_memory_region(kvm, TSS_PRIVATE_MEMSLOT, addr, |
5102 | PAGE_SIZE * 3); | |
cbc94022 IE |
5103 | if (ret) |
5104 | return ret; | |
bfc6d222 | 5105 | kvm->arch.tss_addr = addr; |
1f755a82 | 5106 | return init_rmode_tss(kvm); |
cbc94022 IE |
5107 | } |
5108 | ||
0ca1b4f4 | 5109 | static bool rmode_exception(struct kvm_vcpu *vcpu, int vec) |
6aa8b732 | 5110 | { |
77ab6db0 | 5111 | switch (vec) { |
77ab6db0 | 5112 | case BP_VECTOR: |
c573cd22 JK |
5113 | /* |
5114 | * Update instruction length as we may reinject the exception | |
5115 | * from user space while in guest debugging mode. | |
5116 | */ | |
5117 | to_vmx(vcpu)->vcpu.arch.event_exit_inst_len = | |
5118 | vmcs_read32(VM_EXIT_INSTRUCTION_LEN); | |
d0bfb940 | 5119 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP) |
0ca1b4f4 GN |
5120 | return false; |
5121 | /* fall through */ | |
5122 | case DB_VECTOR: | |
5123 | if (vcpu->guest_debug & | |
5124 | (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP)) | |
5125 | return false; | |
d0bfb940 JK |
5126 | /* fall through */ |
5127 | case DE_VECTOR: | |
77ab6db0 JK |
5128 | case OF_VECTOR: |
5129 | case BR_VECTOR: | |
5130 | case UD_VECTOR: | |
5131 | case DF_VECTOR: | |
5132 | case SS_VECTOR: | |
5133 | case GP_VECTOR: | |
5134 | case MF_VECTOR: | |
0ca1b4f4 GN |
5135 | return true; |
5136 | break; | |
77ab6db0 | 5137 | } |
0ca1b4f4 GN |
5138 | return false; |
5139 | } | |
5140 | ||
5141 | static int handle_rmode_exception(struct kvm_vcpu *vcpu, | |
5142 | int vec, u32 err_code) | |
5143 | { | |
5144 | /* | |
5145 | * Instruction with address size override prefix opcode 0x67 | |
5146 | * Cause the #SS fault with 0 error code in VM86 mode. | |
5147 | */ | |
5148 | if (((vec == GP_VECTOR) || (vec == SS_VECTOR)) && err_code == 0) { | |
5149 | if (emulate_instruction(vcpu, 0) == EMULATE_DONE) { | |
5150 | if (vcpu->arch.halt_request) { | |
5151 | vcpu->arch.halt_request = 0; | |
5cb56059 | 5152 | return kvm_vcpu_halt(vcpu); |
0ca1b4f4 GN |
5153 | } |
5154 | return 1; | |
5155 | } | |
5156 | return 0; | |
5157 | } | |
5158 | ||
5159 | /* | |
5160 | * Forward all other exceptions that are valid in real mode. | |
5161 | * FIXME: Breaks guest debugging in real mode, needs to be fixed with | |
5162 | * the required debugging infrastructure rework. | |
5163 | */ | |
5164 | kvm_queue_exception(vcpu, vec); | |
5165 | return 1; | |
6aa8b732 AK |
5166 | } |
5167 | ||
a0861c02 AK |
5168 | /* |
5169 | * Trigger machine check on the host. We assume all the MSRs are already set up | |
5170 | * by the CPU and that we still run on the same CPU as the MCE occurred on. | |
5171 | * We pass a fake environment to the machine check handler because we want | |
5172 | * the guest to be always treated like user space, no matter what context | |
5173 | * it used internally. | |
5174 | */ | |
5175 | static void kvm_machine_check(void) | |
5176 | { | |
5177 | #if defined(CONFIG_X86_MCE) && defined(CONFIG_X86_64) | |
5178 | struct pt_regs regs = { | |
5179 | .cs = 3, /* Fake ring 3 no matter what the guest ran on */ | |
5180 | .flags = X86_EFLAGS_IF, | |
5181 | }; | |
5182 | ||
5183 | do_machine_check(®s, 0); | |
5184 | #endif | |
5185 | } | |
5186 | ||
851ba692 | 5187 | static int handle_machine_check(struct kvm_vcpu *vcpu) |
a0861c02 AK |
5188 | { |
5189 | /* already handled by vcpu_run */ | |
5190 | return 1; | |
5191 | } | |
5192 | ||
851ba692 | 5193 | static int handle_exception(struct kvm_vcpu *vcpu) |
6aa8b732 | 5194 | { |
1155f76a | 5195 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
851ba692 | 5196 | struct kvm_run *kvm_run = vcpu->run; |
d0bfb940 | 5197 | u32 intr_info, ex_no, error_code; |
42dbaa5a | 5198 | unsigned long cr2, rip, dr6; |
6aa8b732 AK |
5199 | u32 vect_info; |
5200 | enum emulation_result er; | |
5201 | ||
1155f76a | 5202 | vect_info = vmx->idt_vectoring_info; |
88786475 | 5203 | intr_info = vmx->exit_intr_info; |
6aa8b732 | 5204 | |
a0861c02 | 5205 | if (is_machine_check(intr_info)) |
851ba692 | 5206 | return handle_machine_check(vcpu); |
a0861c02 | 5207 | |
e4a41889 | 5208 | if ((intr_info & INTR_INFO_INTR_TYPE_MASK) == INTR_TYPE_NMI_INTR) |
1b6269db | 5209 | return 1; /* already handled by vmx_vcpu_run() */ |
2ab455cc AL |
5210 | |
5211 | if (is_no_device(intr_info)) { | |
5fd86fcf | 5212 | vmx_fpu_activate(vcpu); |
2ab455cc AL |
5213 | return 1; |
5214 | } | |
5215 | ||
7aa81cc0 | 5216 | if (is_invalid_opcode(intr_info)) { |
ae1f5767 JK |
5217 | if (is_guest_mode(vcpu)) { |
5218 | kvm_queue_exception(vcpu, UD_VECTOR); | |
5219 | return 1; | |
5220 | } | |
51d8b661 | 5221 | er = emulate_instruction(vcpu, EMULTYPE_TRAP_UD); |
7aa81cc0 | 5222 | if (er != EMULATE_DONE) |
7ee5d940 | 5223 | kvm_queue_exception(vcpu, UD_VECTOR); |
7aa81cc0 AL |
5224 | return 1; |
5225 | } | |
5226 | ||
6aa8b732 | 5227 | error_code = 0; |
2e11384c | 5228 | if (intr_info & INTR_INFO_DELIVER_CODE_MASK) |
6aa8b732 | 5229 | error_code = vmcs_read32(VM_EXIT_INTR_ERROR_CODE); |
bf4ca23e XG |
5230 | |
5231 | /* | |
5232 | * The #PF with PFEC.RSVD = 1 indicates the guest is accessing | |
5233 | * MMIO, it is better to report an internal error. | |
5234 | * See the comments in vmx_handle_exit. | |
5235 | */ | |
5236 | if ((vect_info & VECTORING_INFO_VALID_MASK) && | |
5237 | !(is_page_fault(intr_info) && !(error_code & PFERR_RSVD_MASK))) { | |
5238 | vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR; | |
5239 | vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_SIMUL_EX; | |
80f0e95d | 5240 | vcpu->run->internal.ndata = 3; |
bf4ca23e XG |
5241 | vcpu->run->internal.data[0] = vect_info; |
5242 | vcpu->run->internal.data[1] = intr_info; | |
80f0e95d | 5243 | vcpu->run->internal.data[2] = error_code; |
bf4ca23e XG |
5244 | return 0; |
5245 | } | |
5246 | ||
6aa8b732 | 5247 | if (is_page_fault(intr_info)) { |
1439442c | 5248 | /* EPT won't cause page fault directly */ |
cf3ace79 | 5249 | BUG_ON(enable_ept); |
6aa8b732 | 5250 | cr2 = vmcs_readl(EXIT_QUALIFICATION); |
229456fc MT |
5251 | trace_kvm_page_fault(cr2, error_code); |
5252 | ||
3298b75c | 5253 | if (kvm_event_needs_reinjection(vcpu)) |
577bdc49 | 5254 | kvm_mmu_unprotect_page_virt(vcpu, cr2); |
dc25e89e | 5255 | return kvm_mmu_page_fault(vcpu, cr2, error_code, NULL, 0); |
6aa8b732 AK |
5256 | } |
5257 | ||
d0bfb940 | 5258 | ex_no = intr_info & INTR_INFO_VECTOR_MASK; |
0ca1b4f4 GN |
5259 | |
5260 | if (vmx->rmode.vm86_active && rmode_exception(vcpu, ex_no)) | |
5261 | return handle_rmode_exception(vcpu, ex_no, error_code); | |
5262 | ||
42dbaa5a | 5263 | switch (ex_no) { |
54a20552 EN |
5264 | case AC_VECTOR: |
5265 | kvm_queue_exception_e(vcpu, AC_VECTOR, error_code); | |
5266 | return 1; | |
42dbaa5a JK |
5267 | case DB_VECTOR: |
5268 | dr6 = vmcs_readl(EXIT_QUALIFICATION); | |
5269 | if (!(vcpu->guest_debug & | |
5270 | (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP))) { | |
8246bf52 | 5271 | vcpu->arch.dr6 &= ~15; |
6f43ed01 | 5272 | vcpu->arch.dr6 |= dr6 | DR6_RTM; |
fd2a445a HD |
5273 | if (!(dr6 & ~DR6_RESERVED)) /* icebp */ |
5274 | skip_emulated_instruction(vcpu); | |
5275 | ||
42dbaa5a JK |
5276 | kvm_queue_exception(vcpu, DB_VECTOR); |
5277 | return 1; | |
5278 | } | |
5279 | kvm_run->debug.arch.dr6 = dr6 | DR6_FIXED_1; | |
5280 | kvm_run->debug.arch.dr7 = vmcs_readl(GUEST_DR7); | |
5281 | /* fall through */ | |
5282 | case BP_VECTOR: | |
c573cd22 JK |
5283 | /* |
5284 | * Update instruction length as we may reinject #BP from | |
5285 | * user space while in guest debugging mode. Reading it for | |
5286 | * #DB as well causes no harm, it is not used in that case. | |
5287 | */ | |
5288 | vmx->vcpu.arch.event_exit_inst_len = | |
5289 | vmcs_read32(VM_EXIT_INSTRUCTION_LEN); | |
6aa8b732 | 5290 | kvm_run->exit_reason = KVM_EXIT_DEBUG; |
0a434bb2 | 5291 | rip = kvm_rip_read(vcpu); |
d0bfb940 JK |
5292 | kvm_run->debug.arch.pc = vmcs_readl(GUEST_CS_BASE) + rip; |
5293 | kvm_run->debug.arch.exception = ex_no; | |
42dbaa5a JK |
5294 | break; |
5295 | default: | |
d0bfb940 JK |
5296 | kvm_run->exit_reason = KVM_EXIT_EXCEPTION; |
5297 | kvm_run->ex.exception = ex_no; | |
5298 | kvm_run->ex.error_code = error_code; | |
42dbaa5a | 5299 | break; |
6aa8b732 | 5300 | } |
6aa8b732 AK |
5301 | return 0; |
5302 | } | |
5303 | ||
851ba692 | 5304 | static int handle_external_interrupt(struct kvm_vcpu *vcpu) |
6aa8b732 | 5305 | { |
1165f5fe | 5306 | ++vcpu->stat.irq_exits; |
6aa8b732 AK |
5307 | return 1; |
5308 | } | |
5309 | ||
851ba692 | 5310 | static int handle_triple_fault(struct kvm_vcpu *vcpu) |
988ad74f | 5311 | { |
851ba692 | 5312 | vcpu->run->exit_reason = KVM_EXIT_SHUTDOWN; |
988ad74f AK |
5313 | return 0; |
5314 | } | |
6aa8b732 | 5315 | |
851ba692 | 5316 | static int handle_io(struct kvm_vcpu *vcpu) |
6aa8b732 | 5317 | { |
bfdaab09 | 5318 | unsigned long exit_qualification; |
34c33d16 | 5319 | int size, in, string; |
039576c0 | 5320 | unsigned port; |
6aa8b732 | 5321 | |
bfdaab09 | 5322 | exit_qualification = vmcs_readl(EXIT_QUALIFICATION); |
039576c0 | 5323 | string = (exit_qualification & 16) != 0; |
cf8f70bf | 5324 | in = (exit_qualification & 8) != 0; |
e70669ab | 5325 | |
cf8f70bf | 5326 | ++vcpu->stat.io_exits; |
e70669ab | 5327 | |
cf8f70bf | 5328 | if (string || in) |
51d8b661 | 5329 | return emulate_instruction(vcpu, 0) == EMULATE_DONE; |
e70669ab | 5330 | |
cf8f70bf GN |
5331 | port = exit_qualification >> 16; |
5332 | size = (exit_qualification & 7) + 1; | |
e93f36bc | 5333 | skip_emulated_instruction(vcpu); |
cf8f70bf GN |
5334 | |
5335 | return kvm_fast_pio_out(vcpu, size, port); | |
6aa8b732 AK |
5336 | } |
5337 | ||
102d8325 IM |
5338 | static void |
5339 | vmx_patch_hypercall(struct kvm_vcpu *vcpu, unsigned char *hypercall) | |
5340 | { | |
5341 | /* | |
5342 | * Patch in the VMCALL instruction: | |
5343 | */ | |
5344 | hypercall[0] = 0x0f; | |
5345 | hypercall[1] = 0x01; | |
5346 | hypercall[2] = 0xc1; | |
102d8325 IM |
5347 | } |
5348 | ||
b9c237bb | 5349 | static bool nested_cr0_valid(struct kvm_vcpu *vcpu, unsigned long val) |
92fbc7b1 JK |
5350 | { |
5351 | unsigned long always_on = VMXON_CR0_ALWAYSON; | |
b9c237bb | 5352 | struct vmcs12 *vmcs12 = get_vmcs12(vcpu); |
92fbc7b1 | 5353 | |
b9c237bb | 5354 | if (to_vmx(vcpu)->nested.nested_vmx_secondary_ctls_high & |
92fbc7b1 JK |
5355 | SECONDARY_EXEC_UNRESTRICTED_GUEST && |
5356 | nested_cpu_has2(vmcs12, SECONDARY_EXEC_UNRESTRICTED_GUEST)) | |
5357 | always_on &= ~(X86_CR0_PE | X86_CR0_PG); | |
5358 | return (val & always_on) == always_on; | |
5359 | } | |
5360 | ||
0fa06071 | 5361 | /* called to set cr0 as appropriate for a mov-to-cr0 exit. */ |
eeadf9e7 NHE |
5362 | static int handle_set_cr0(struct kvm_vcpu *vcpu, unsigned long val) |
5363 | { | |
eeadf9e7 | 5364 | if (is_guest_mode(vcpu)) { |
1a0d74e6 JK |
5365 | struct vmcs12 *vmcs12 = get_vmcs12(vcpu); |
5366 | unsigned long orig_val = val; | |
5367 | ||
eeadf9e7 NHE |
5368 | /* |
5369 | * We get here when L2 changed cr0 in a way that did not change | |
5370 | * any of L1's shadowed bits (see nested_vmx_exit_handled_cr), | |
1a0d74e6 JK |
5371 | * but did change L0 shadowed bits. So we first calculate the |
5372 | * effective cr0 value that L1 would like to write into the | |
5373 | * hardware. It consists of the L2-owned bits from the new | |
5374 | * value combined with the L1-owned bits from L1's guest_cr0. | |
eeadf9e7 | 5375 | */ |
1a0d74e6 JK |
5376 | val = (val & ~vmcs12->cr0_guest_host_mask) | |
5377 | (vmcs12->guest_cr0 & vmcs12->cr0_guest_host_mask); | |
5378 | ||
b9c237bb | 5379 | if (!nested_cr0_valid(vcpu, val)) |
eeadf9e7 | 5380 | return 1; |
1a0d74e6 JK |
5381 | |
5382 | if (kvm_set_cr0(vcpu, val)) | |
5383 | return 1; | |
5384 | vmcs_writel(CR0_READ_SHADOW, orig_val); | |
eeadf9e7 | 5385 | return 0; |
1a0d74e6 JK |
5386 | } else { |
5387 | if (to_vmx(vcpu)->nested.vmxon && | |
5388 | ((val & VMXON_CR0_ALWAYSON) != VMXON_CR0_ALWAYSON)) | |
5389 | return 1; | |
eeadf9e7 | 5390 | return kvm_set_cr0(vcpu, val); |
1a0d74e6 | 5391 | } |
eeadf9e7 NHE |
5392 | } |
5393 | ||
5394 | static int handle_set_cr4(struct kvm_vcpu *vcpu, unsigned long val) | |
5395 | { | |
5396 | if (is_guest_mode(vcpu)) { | |
1a0d74e6 JK |
5397 | struct vmcs12 *vmcs12 = get_vmcs12(vcpu); |
5398 | unsigned long orig_val = val; | |
5399 | ||
5400 | /* analogously to handle_set_cr0 */ | |
5401 | val = (val & ~vmcs12->cr4_guest_host_mask) | | |
5402 | (vmcs12->guest_cr4 & vmcs12->cr4_guest_host_mask); | |
5403 | if (kvm_set_cr4(vcpu, val)) | |
eeadf9e7 | 5404 | return 1; |
1a0d74e6 | 5405 | vmcs_writel(CR4_READ_SHADOW, orig_val); |
eeadf9e7 NHE |
5406 | return 0; |
5407 | } else | |
5408 | return kvm_set_cr4(vcpu, val); | |
5409 | } | |
5410 | ||
5411 | /* called to set cr0 as approriate for clts instruction exit. */ | |
5412 | static void handle_clts(struct kvm_vcpu *vcpu) | |
5413 | { | |
5414 | if (is_guest_mode(vcpu)) { | |
5415 | /* | |
5416 | * We get here when L2 did CLTS, and L1 didn't shadow CR0.TS | |
5417 | * but we did (!fpu_active). We need to keep GUEST_CR0.TS on, | |
5418 | * just pretend it's off (also in arch.cr0 for fpu_activate). | |
5419 | */ | |
5420 | vmcs_writel(CR0_READ_SHADOW, | |
5421 | vmcs_readl(CR0_READ_SHADOW) & ~X86_CR0_TS); | |
5422 | vcpu->arch.cr0 &= ~X86_CR0_TS; | |
5423 | } else | |
5424 | vmx_set_cr0(vcpu, kvm_read_cr0_bits(vcpu, ~X86_CR0_TS)); | |
5425 | } | |
5426 | ||
851ba692 | 5427 | static int handle_cr(struct kvm_vcpu *vcpu) |
6aa8b732 | 5428 | { |
229456fc | 5429 | unsigned long exit_qualification, val; |
6aa8b732 AK |
5430 | int cr; |
5431 | int reg; | |
49a9b07e | 5432 | int err; |
6aa8b732 | 5433 | |
bfdaab09 | 5434 | exit_qualification = vmcs_readl(EXIT_QUALIFICATION); |
6aa8b732 AK |
5435 | cr = exit_qualification & 15; |
5436 | reg = (exit_qualification >> 8) & 15; | |
5437 | switch ((exit_qualification >> 4) & 3) { | |
5438 | case 0: /* mov to cr */ | |
1e32c079 | 5439 | val = kvm_register_readl(vcpu, reg); |
229456fc | 5440 | trace_kvm_cr_write(cr, val); |
6aa8b732 AK |
5441 | switch (cr) { |
5442 | case 0: | |
eeadf9e7 | 5443 | err = handle_set_cr0(vcpu, val); |
db8fcefa | 5444 | kvm_complete_insn_gp(vcpu, err); |
6aa8b732 AK |
5445 | return 1; |
5446 | case 3: | |
2390218b | 5447 | err = kvm_set_cr3(vcpu, val); |
db8fcefa | 5448 | kvm_complete_insn_gp(vcpu, err); |
6aa8b732 AK |
5449 | return 1; |
5450 | case 4: | |
eeadf9e7 | 5451 | err = handle_set_cr4(vcpu, val); |
db8fcefa | 5452 | kvm_complete_insn_gp(vcpu, err); |
6aa8b732 | 5453 | return 1; |
0a5fff19 GN |
5454 | case 8: { |
5455 | u8 cr8_prev = kvm_get_cr8(vcpu); | |
1e32c079 | 5456 | u8 cr8 = (u8)val; |
eea1cff9 | 5457 | err = kvm_set_cr8(vcpu, cr8); |
db8fcefa | 5458 | kvm_complete_insn_gp(vcpu, err); |
35754c98 | 5459 | if (lapic_in_kernel(vcpu)) |
0a5fff19 GN |
5460 | return 1; |
5461 | if (cr8_prev <= cr8) | |
5462 | return 1; | |
851ba692 | 5463 | vcpu->run->exit_reason = KVM_EXIT_SET_TPR; |
0a5fff19 GN |
5464 | return 0; |
5465 | } | |
4b8073e4 | 5466 | } |
6aa8b732 | 5467 | break; |
25c4c276 | 5468 | case 2: /* clts */ |
eeadf9e7 | 5469 | handle_clts(vcpu); |
4d4ec087 | 5470 | trace_kvm_cr_write(0, kvm_read_cr0(vcpu)); |
25c4c276 | 5471 | skip_emulated_instruction(vcpu); |
6b52d186 | 5472 | vmx_fpu_activate(vcpu); |
25c4c276 | 5473 | return 1; |
6aa8b732 AK |
5474 | case 1: /*mov from cr*/ |
5475 | switch (cr) { | |
5476 | case 3: | |
9f8fe504 AK |
5477 | val = kvm_read_cr3(vcpu); |
5478 | kvm_register_write(vcpu, reg, val); | |
5479 | trace_kvm_cr_read(cr, val); | |
6aa8b732 AK |
5480 | skip_emulated_instruction(vcpu); |
5481 | return 1; | |
5482 | case 8: | |
229456fc MT |
5483 | val = kvm_get_cr8(vcpu); |
5484 | kvm_register_write(vcpu, reg, val); | |
5485 | trace_kvm_cr_read(cr, val); | |
6aa8b732 AK |
5486 | skip_emulated_instruction(vcpu); |
5487 | return 1; | |
5488 | } | |
5489 | break; | |
5490 | case 3: /* lmsw */ | |
a1f83a74 | 5491 | val = (exit_qualification >> LMSW_SOURCE_DATA_SHIFT) & 0x0f; |
4d4ec087 | 5492 | trace_kvm_cr_write(0, (kvm_read_cr0(vcpu) & ~0xful) | val); |
a1f83a74 | 5493 | kvm_lmsw(vcpu, val); |
6aa8b732 AK |
5494 | |
5495 | skip_emulated_instruction(vcpu); | |
5496 | return 1; | |
5497 | default: | |
5498 | break; | |
5499 | } | |
851ba692 | 5500 | vcpu->run->exit_reason = 0; |
a737f256 | 5501 | vcpu_unimpl(vcpu, "unhandled control register: op %d cr %d\n", |
6aa8b732 AK |
5502 | (int)(exit_qualification >> 4) & 3, cr); |
5503 | return 0; | |
5504 | } | |
5505 | ||
851ba692 | 5506 | static int handle_dr(struct kvm_vcpu *vcpu) |
6aa8b732 | 5507 | { |
bfdaab09 | 5508 | unsigned long exit_qualification; |
16f8a6f9 NA |
5509 | int dr, dr7, reg; |
5510 | ||
5511 | exit_qualification = vmcs_readl(EXIT_QUALIFICATION); | |
5512 | dr = exit_qualification & DEBUG_REG_ACCESS_NUM; | |
5513 | ||
5514 | /* First, if DR does not exist, trigger UD */ | |
5515 | if (!kvm_require_dr(vcpu, dr)) | |
5516 | return 1; | |
6aa8b732 | 5517 | |
f2483415 | 5518 | /* Do not handle if the CPL > 0, will trigger GP on re-entry */ |
0a79b009 AK |
5519 | if (!kvm_require_cpl(vcpu, 0)) |
5520 | return 1; | |
16f8a6f9 NA |
5521 | dr7 = vmcs_readl(GUEST_DR7); |
5522 | if (dr7 & DR7_GD) { | |
42dbaa5a JK |
5523 | /* |
5524 | * As the vm-exit takes precedence over the debug trap, we | |
5525 | * need to emulate the latter, either for the host or the | |
5526 | * guest debugging itself. | |
5527 | */ | |
5528 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) { | |
851ba692 | 5529 | vcpu->run->debug.arch.dr6 = vcpu->arch.dr6; |
16f8a6f9 | 5530 | vcpu->run->debug.arch.dr7 = dr7; |
82b32774 | 5531 | vcpu->run->debug.arch.pc = kvm_get_linear_rip(vcpu); |
851ba692 AK |
5532 | vcpu->run->debug.arch.exception = DB_VECTOR; |
5533 | vcpu->run->exit_reason = KVM_EXIT_DEBUG; | |
42dbaa5a JK |
5534 | return 0; |
5535 | } else { | |
7305eb5d | 5536 | vcpu->arch.dr6 &= ~15; |
6f43ed01 | 5537 | vcpu->arch.dr6 |= DR6_BD | DR6_RTM; |
42dbaa5a JK |
5538 | kvm_queue_exception(vcpu, DB_VECTOR); |
5539 | return 1; | |
5540 | } | |
5541 | } | |
5542 | ||
81908bf4 PB |
5543 | if (vcpu->guest_debug == 0) { |
5544 | u32 cpu_based_vm_exec_control; | |
5545 | ||
5546 | cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL); | |
5547 | cpu_based_vm_exec_control &= ~CPU_BASED_MOV_DR_EXITING; | |
5548 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control); | |
5549 | ||
5550 | /* | |
5551 | * No more DR vmexits; force a reload of the debug registers | |
5552 | * and reenter on this instruction. The next vmexit will | |
5553 | * retrieve the full state of the debug registers. | |
5554 | */ | |
5555 | vcpu->arch.switch_db_regs |= KVM_DEBUGREG_WONT_EXIT; | |
5556 | return 1; | |
5557 | } | |
5558 | ||
42dbaa5a JK |
5559 | reg = DEBUG_REG_ACCESS_REG(exit_qualification); |
5560 | if (exit_qualification & TYPE_MOV_FROM_DR) { | |
020df079 | 5561 | unsigned long val; |
4c4d563b JK |
5562 | |
5563 | if (kvm_get_dr(vcpu, dr, &val)) | |
5564 | return 1; | |
5565 | kvm_register_write(vcpu, reg, val); | |
020df079 | 5566 | } else |
5777392e | 5567 | if (kvm_set_dr(vcpu, dr, kvm_register_readl(vcpu, reg))) |
4c4d563b JK |
5568 | return 1; |
5569 | ||
6aa8b732 AK |
5570 | skip_emulated_instruction(vcpu); |
5571 | return 1; | |
5572 | } | |
5573 | ||
73aaf249 JK |
5574 | static u64 vmx_get_dr6(struct kvm_vcpu *vcpu) |
5575 | { | |
5576 | return vcpu->arch.dr6; | |
5577 | } | |
5578 | ||
5579 | static void vmx_set_dr6(struct kvm_vcpu *vcpu, unsigned long val) | |
5580 | { | |
5581 | } | |
5582 | ||
81908bf4 PB |
5583 | static void vmx_sync_dirty_debug_regs(struct kvm_vcpu *vcpu) |
5584 | { | |
5585 | u32 cpu_based_vm_exec_control; | |
5586 | ||
5587 | get_debugreg(vcpu->arch.db[0], 0); | |
5588 | get_debugreg(vcpu->arch.db[1], 1); | |
5589 | get_debugreg(vcpu->arch.db[2], 2); | |
5590 | get_debugreg(vcpu->arch.db[3], 3); | |
5591 | get_debugreg(vcpu->arch.dr6, 6); | |
5592 | vcpu->arch.dr7 = vmcs_readl(GUEST_DR7); | |
5593 | ||
5594 | vcpu->arch.switch_db_regs &= ~KVM_DEBUGREG_WONT_EXIT; | |
5595 | ||
5596 | cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL); | |
5597 | cpu_based_vm_exec_control |= CPU_BASED_MOV_DR_EXITING; | |
5598 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control); | |
5599 | } | |
5600 | ||
020df079 GN |
5601 | static void vmx_set_dr7(struct kvm_vcpu *vcpu, unsigned long val) |
5602 | { | |
5603 | vmcs_writel(GUEST_DR7, val); | |
5604 | } | |
5605 | ||
851ba692 | 5606 | static int handle_cpuid(struct kvm_vcpu *vcpu) |
6aa8b732 | 5607 | { |
06465c5a AK |
5608 | kvm_emulate_cpuid(vcpu); |
5609 | return 1; | |
6aa8b732 AK |
5610 | } |
5611 | ||
851ba692 | 5612 | static int handle_rdmsr(struct kvm_vcpu *vcpu) |
6aa8b732 | 5613 | { |
ad312c7c | 5614 | u32 ecx = vcpu->arch.regs[VCPU_REGS_RCX]; |
609e36d3 | 5615 | struct msr_data msr_info; |
6aa8b732 | 5616 | |
609e36d3 PB |
5617 | msr_info.index = ecx; |
5618 | msr_info.host_initiated = false; | |
5619 | if (vmx_get_msr(vcpu, &msr_info)) { | |
59200273 | 5620 | trace_kvm_msr_read_ex(ecx); |
c1a5d4f9 | 5621 | kvm_inject_gp(vcpu, 0); |
6aa8b732 AK |
5622 | return 1; |
5623 | } | |
5624 | ||
609e36d3 | 5625 | trace_kvm_msr_read(ecx, msr_info.data); |
2714d1d3 | 5626 | |
6aa8b732 | 5627 | /* FIXME: handling of bits 32:63 of rax, rdx */ |
609e36d3 PB |
5628 | vcpu->arch.regs[VCPU_REGS_RAX] = msr_info.data & -1u; |
5629 | vcpu->arch.regs[VCPU_REGS_RDX] = (msr_info.data >> 32) & -1u; | |
6aa8b732 AK |
5630 | skip_emulated_instruction(vcpu); |
5631 | return 1; | |
5632 | } | |
5633 | ||
851ba692 | 5634 | static int handle_wrmsr(struct kvm_vcpu *vcpu) |
6aa8b732 | 5635 | { |
8fe8ab46 | 5636 | struct msr_data msr; |
ad312c7c ZX |
5637 | u32 ecx = vcpu->arch.regs[VCPU_REGS_RCX]; |
5638 | u64 data = (vcpu->arch.regs[VCPU_REGS_RAX] & -1u) | |
5639 | | ((u64)(vcpu->arch.regs[VCPU_REGS_RDX] & -1u) << 32); | |
6aa8b732 | 5640 | |
8fe8ab46 WA |
5641 | msr.data = data; |
5642 | msr.index = ecx; | |
5643 | msr.host_initiated = false; | |
854e8bb1 | 5644 | if (kvm_set_msr(vcpu, &msr) != 0) { |
59200273 | 5645 | trace_kvm_msr_write_ex(ecx, data); |
c1a5d4f9 | 5646 | kvm_inject_gp(vcpu, 0); |
6aa8b732 AK |
5647 | return 1; |
5648 | } | |
5649 | ||
59200273 | 5650 | trace_kvm_msr_write(ecx, data); |
6aa8b732 AK |
5651 | skip_emulated_instruction(vcpu); |
5652 | return 1; | |
5653 | } | |
5654 | ||
851ba692 | 5655 | static int handle_tpr_below_threshold(struct kvm_vcpu *vcpu) |
6e5d865c | 5656 | { |
3842d135 | 5657 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
6e5d865c YS |
5658 | return 1; |
5659 | } | |
5660 | ||
851ba692 | 5661 | static int handle_interrupt_window(struct kvm_vcpu *vcpu) |
6aa8b732 | 5662 | { |
85f455f7 ED |
5663 | u32 cpu_based_vm_exec_control; |
5664 | ||
5665 | /* clear pending irq */ | |
5666 | cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL); | |
5667 | cpu_based_vm_exec_control &= ~CPU_BASED_VIRTUAL_INTR_PENDING; | |
5668 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control); | |
2714d1d3 | 5669 | |
3842d135 AK |
5670 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
5671 | ||
a26bf12a | 5672 | ++vcpu->stat.irq_window_exits; |
6aa8b732 AK |
5673 | return 1; |
5674 | } | |
5675 | ||
851ba692 | 5676 | static int handle_halt(struct kvm_vcpu *vcpu) |
6aa8b732 | 5677 | { |
d3bef15f | 5678 | return kvm_emulate_halt(vcpu); |
6aa8b732 AK |
5679 | } |
5680 | ||
851ba692 | 5681 | static int handle_vmcall(struct kvm_vcpu *vcpu) |
c21415e8 | 5682 | { |
7aa81cc0 AL |
5683 | kvm_emulate_hypercall(vcpu); |
5684 | return 1; | |
c21415e8 IM |
5685 | } |
5686 | ||
ec25d5e6 GN |
5687 | static int handle_invd(struct kvm_vcpu *vcpu) |
5688 | { | |
51d8b661 | 5689 | return emulate_instruction(vcpu, 0) == EMULATE_DONE; |
ec25d5e6 GN |
5690 | } |
5691 | ||
851ba692 | 5692 | static int handle_invlpg(struct kvm_vcpu *vcpu) |
a7052897 | 5693 | { |
f9c617f6 | 5694 | unsigned long exit_qualification = vmcs_readl(EXIT_QUALIFICATION); |
a7052897 MT |
5695 | |
5696 | kvm_mmu_invlpg(vcpu, exit_qualification); | |
5697 | skip_emulated_instruction(vcpu); | |
5698 | return 1; | |
5699 | } | |
5700 | ||
fee84b07 AK |
5701 | static int handle_rdpmc(struct kvm_vcpu *vcpu) |
5702 | { | |
5703 | int err; | |
5704 | ||
5705 | err = kvm_rdpmc(vcpu); | |
5706 | kvm_complete_insn_gp(vcpu, err); | |
5707 | ||
5708 | return 1; | |
5709 | } | |
5710 | ||
851ba692 | 5711 | static int handle_wbinvd(struct kvm_vcpu *vcpu) |
e5edaa01 | 5712 | { |
f5f48ee1 | 5713 | kvm_emulate_wbinvd(vcpu); |
e5edaa01 ED |
5714 | return 1; |
5715 | } | |
5716 | ||
2acf923e DC |
5717 | static int handle_xsetbv(struct kvm_vcpu *vcpu) |
5718 | { | |
5719 | u64 new_bv = kvm_read_edx_eax(vcpu); | |
5720 | u32 index = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
5721 | ||
5722 | if (kvm_set_xcr(vcpu, index, new_bv) == 0) | |
5723 | skip_emulated_instruction(vcpu); | |
5724 | return 1; | |
5725 | } | |
5726 | ||
f53cd63c WL |
5727 | static int handle_xsaves(struct kvm_vcpu *vcpu) |
5728 | { | |
5729 | skip_emulated_instruction(vcpu); | |
5730 | WARN(1, "this should never happen\n"); | |
5731 | return 1; | |
5732 | } | |
5733 | ||
5734 | static int handle_xrstors(struct kvm_vcpu *vcpu) | |
5735 | { | |
5736 | skip_emulated_instruction(vcpu); | |
5737 | WARN(1, "this should never happen\n"); | |
5738 | return 1; | |
5739 | } | |
5740 | ||
851ba692 | 5741 | static int handle_apic_access(struct kvm_vcpu *vcpu) |
f78e0e2e | 5742 | { |
58fbbf26 KT |
5743 | if (likely(fasteoi)) { |
5744 | unsigned long exit_qualification = vmcs_readl(EXIT_QUALIFICATION); | |
5745 | int access_type, offset; | |
5746 | ||
5747 | access_type = exit_qualification & APIC_ACCESS_TYPE; | |
5748 | offset = exit_qualification & APIC_ACCESS_OFFSET; | |
5749 | /* | |
5750 | * Sane guest uses MOV to write EOI, with written value | |
5751 | * not cared. So make a short-circuit here by avoiding | |
5752 | * heavy instruction emulation. | |
5753 | */ | |
5754 | if ((access_type == TYPE_LINEAR_APIC_INST_WRITE) && | |
5755 | (offset == APIC_EOI)) { | |
5756 | kvm_lapic_set_eoi(vcpu); | |
5757 | skip_emulated_instruction(vcpu); | |
5758 | return 1; | |
5759 | } | |
5760 | } | |
51d8b661 | 5761 | return emulate_instruction(vcpu, 0) == EMULATE_DONE; |
f78e0e2e SY |
5762 | } |
5763 | ||
c7c9c56c YZ |
5764 | static int handle_apic_eoi_induced(struct kvm_vcpu *vcpu) |
5765 | { | |
5766 | unsigned long exit_qualification = vmcs_readl(EXIT_QUALIFICATION); | |
5767 | int vector = exit_qualification & 0xff; | |
5768 | ||
5769 | /* EOI-induced VM exit is trap-like and thus no need to adjust IP */ | |
5770 | kvm_apic_set_eoi_accelerated(vcpu, vector); | |
5771 | return 1; | |
5772 | } | |
5773 | ||
83d4c286 YZ |
5774 | static int handle_apic_write(struct kvm_vcpu *vcpu) |
5775 | { | |
5776 | unsigned long exit_qualification = vmcs_readl(EXIT_QUALIFICATION); | |
5777 | u32 offset = exit_qualification & 0xfff; | |
5778 | ||
5779 | /* APIC-write VM exit is trap-like and thus no need to adjust IP */ | |
5780 | kvm_apic_write_nodecode(vcpu, offset); | |
5781 | return 1; | |
5782 | } | |
5783 | ||
851ba692 | 5784 | static int handle_task_switch(struct kvm_vcpu *vcpu) |
37817f29 | 5785 | { |
60637aac | 5786 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
37817f29 | 5787 | unsigned long exit_qualification; |
e269fb21 JK |
5788 | bool has_error_code = false; |
5789 | u32 error_code = 0; | |
37817f29 | 5790 | u16 tss_selector; |
7f3d35fd | 5791 | int reason, type, idt_v, idt_index; |
64a7ec06 GN |
5792 | |
5793 | idt_v = (vmx->idt_vectoring_info & VECTORING_INFO_VALID_MASK); | |
7f3d35fd | 5794 | idt_index = (vmx->idt_vectoring_info & VECTORING_INFO_VECTOR_MASK); |
64a7ec06 | 5795 | type = (vmx->idt_vectoring_info & VECTORING_INFO_TYPE_MASK); |
37817f29 IE |
5796 | |
5797 | exit_qualification = vmcs_readl(EXIT_QUALIFICATION); | |
5798 | ||
5799 | reason = (u32)exit_qualification >> 30; | |
64a7ec06 GN |
5800 | if (reason == TASK_SWITCH_GATE && idt_v) { |
5801 | switch (type) { | |
5802 | case INTR_TYPE_NMI_INTR: | |
5803 | vcpu->arch.nmi_injected = false; | |
654f06fc | 5804 | vmx_set_nmi_mask(vcpu, true); |
64a7ec06 GN |
5805 | break; |
5806 | case INTR_TYPE_EXT_INTR: | |
66fd3f7f | 5807 | case INTR_TYPE_SOFT_INTR: |
64a7ec06 GN |
5808 | kvm_clear_interrupt_queue(vcpu); |
5809 | break; | |
5810 | case INTR_TYPE_HARD_EXCEPTION: | |
e269fb21 JK |
5811 | if (vmx->idt_vectoring_info & |
5812 | VECTORING_INFO_DELIVER_CODE_MASK) { | |
5813 | has_error_code = true; | |
5814 | error_code = | |
5815 | vmcs_read32(IDT_VECTORING_ERROR_CODE); | |
5816 | } | |
5817 | /* fall through */ | |
64a7ec06 GN |
5818 | case INTR_TYPE_SOFT_EXCEPTION: |
5819 | kvm_clear_exception_queue(vcpu); | |
5820 | break; | |
5821 | default: | |
5822 | break; | |
5823 | } | |
60637aac | 5824 | } |
37817f29 IE |
5825 | tss_selector = exit_qualification; |
5826 | ||
64a7ec06 GN |
5827 | if (!idt_v || (type != INTR_TYPE_HARD_EXCEPTION && |
5828 | type != INTR_TYPE_EXT_INTR && | |
5829 | type != INTR_TYPE_NMI_INTR)) | |
5830 | skip_emulated_instruction(vcpu); | |
5831 | ||
7f3d35fd KW |
5832 | if (kvm_task_switch(vcpu, tss_selector, |
5833 | type == INTR_TYPE_SOFT_INTR ? idt_index : -1, reason, | |
5834 | has_error_code, error_code) == EMULATE_FAIL) { | |
acb54517 GN |
5835 | vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR; |
5836 | vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION; | |
5837 | vcpu->run->internal.ndata = 0; | |
42dbaa5a | 5838 | return 0; |
acb54517 | 5839 | } |
42dbaa5a | 5840 | |
42dbaa5a JK |
5841 | /* |
5842 | * TODO: What about debug traps on tss switch? | |
5843 | * Are we supposed to inject them and update dr6? | |
5844 | */ | |
5845 | ||
5846 | return 1; | |
37817f29 IE |
5847 | } |
5848 | ||
851ba692 | 5849 | static int handle_ept_violation(struct kvm_vcpu *vcpu) |
1439442c | 5850 | { |
f9c617f6 | 5851 | unsigned long exit_qualification; |
1439442c | 5852 | gpa_t gpa; |
4f5982a5 | 5853 | u32 error_code; |
1439442c | 5854 | int gla_validity; |
1439442c | 5855 | |
f9c617f6 | 5856 | exit_qualification = vmcs_readl(EXIT_QUALIFICATION); |
1439442c | 5857 | |
1439442c SY |
5858 | gla_validity = (exit_qualification >> 7) & 0x3; |
5859 | if (gla_validity != 0x3 && gla_validity != 0x1 && gla_validity != 0) { | |
5860 | printk(KERN_ERR "EPT: Handling EPT violation failed!\n"); | |
5861 | printk(KERN_ERR "EPT: GPA: 0x%lx, GVA: 0x%lx\n", | |
5862 | (long unsigned int)vmcs_read64(GUEST_PHYSICAL_ADDRESS), | |
f9c617f6 | 5863 | vmcs_readl(GUEST_LINEAR_ADDRESS)); |
1439442c SY |
5864 | printk(KERN_ERR "EPT: Exit qualification is 0x%lx\n", |
5865 | (long unsigned int)exit_qualification); | |
851ba692 AK |
5866 | vcpu->run->exit_reason = KVM_EXIT_UNKNOWN; |
5867 | vcpu->run->hw.hardware_exit_reason = EXIT_REASON_EPT_VIOLATION; | |
596ae895 | 5868 | return 0; |
1439442c SY |
5869 | } |
5870 | ||
0be9c7a8 GN |
5871 | /* |
5872 | * EPT violation happened while executing iret from NMI, | |
5873 | * "blocked by NMI" bit has to be set before next VM entry. | |
5874 | * There are errata that may cause this bit to not be set: | |
5875 | * AAK134, BY25. | |
5876 | */ | |
bcd1c294 GN |
5877 | if (!(to_vmx(vcpu)->idt_vectoring_info & VECTORING_INFO_VALID_MASK) && |
5878 | cpu_has_virtual_nmis() && | |
5879 | (exit_qualification & INTR_INFO_UNBLOCK_NMI)) | |
0be9c7a8 GN |
5880 | vmcs_set_bits(GUEST_INTERRUPTIBILITY_INFO, GUEST_INTR_STATE_NMI); |
5881 | ||
1439442c | 5882 | gpa = vmcs_read64(GUEST_PHYSICAL_ADDRESS); |
229456fc | 5883 | trace_kvm_page_fault(gpa, exit_qualification); |
4f5982a5 XG |
5884 | |
5885 | /* It is a write fault? */ | |
81ed33e4 | 5886 | error_code = exit_qualification & PFERR_WRITE_MASK; |
25d92081 | 5887 | /* It is a fetch fault? */ |
81ed33e4 | 5888 | error_code |= (exit_qualification << 2) & PFERR_FETCH_MASK; |
4f5982a5 | 5889 | /* ept page table is present? */ |
81ed33e4 | 5890 | error_code |= (exit_qualification >> 3) & PFERR_PRESENT_MASK; |
4f5982a5 | 5891 | |
25d92081 YZ |
5892 | vcpu->arch.exit_qualification = exit_qualification; |
5893 | ||
4f5982a5 | 5894 | return kvm_mmu_page_fault(vcpu, gpa, error_code, NULL, 0); |
1439442c SY |
5895 | } |
5896 | ||
851ba692 | 5897 | static int handle_ept_misconfig(struct kvm_vcpu *vcpu) |
68f89400 | 5898 | { |
f735d4af | 5899 | int ret; |
68f89400 MT |
5900 | gpa_t gpa; |
5901 | ||
5902 | gpa = vmcs_read64(GUEST_PHYSICAL_ADDRESS); | |
e32edf4f | 5903 | if (!kvm_io_bus_write(vcpu, KVM_FAST_MMIO_BUS, gpa, 0, NULL)) { |
68c3b4d1 | 5904 | skip_emulated_instruction(vcpu); |
931c33b1 | 5905 | trace_kvm_fast_mmio(gpa); |
68c3b4d1 MT |
5906 | return 1; |
5907 | } | |
68f89400 | 5908 | |
450869d6 | 5909 | ret = handle_mmio_page_fault(vcpu, gpa, true); |
b37fbea6 | 5910 | if (likely(ret == RET_MMIO_PF_EMULATE)) |
ce88decf XG |
5911 | return x86_emulate_instruction(vcpu, gpa, 0, NULL, 0) == |
5912 | EMULATE_DONE; | |
f8f55942 XG |
5913 | |
5914 | if (unlikely(ret == RET_MMIO_PF_INVALID)) | |
5915 | return kvm_mmu_page_fault(vcpu, gpa, 0, NULL, 0); | |
5916 | ||
b37fbea6 | 5917 | if (unlikely(ret == RET_MMIO_PF_RETRY)) |
ce88decf XG |
5918 | return 1; |
5919 | ||
5920 | /* It is the real ept misconfig */ | |
f735d4af | 5921 | WARN_ON(1); |
68f89400 | 5922 | |
851ba692 AK |
5923 | vcpu->run->exit_reason = KVM_EXIT_UNKNOWN; |
5924 | vcpu->run->hw.hardware_exit_reason = EXIT_REASON_EPT_MISCONFIG; | |
68f89400 MT |
5925 | |
5926 | return 0; | |
5927 | } | |
5928 | ||
851ba692 | 5929 | static int handle_nmi_window(struct kvm_vcpu *vcpu) |
f08864b4 SY |
5930 | { |
5931 | u32 cpu_based_vm_exec_control; | |
5932 | ||
5933 | /* clear pending NMI */ | |
5934 | cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL); | |
5935 | cpu_based_vm_exec_control &= ~CPU_BASED_VIRTUAL_NMI_PENDING; | |
5936 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control); | |
5937 | ++vcpu->stat.nmi_window_exits; | |
3842d135 | 5938 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
f08864b4 SY |
5939 | |
5940 | return 1; | |
5941 | } | |
5942 | ||
80ced186 | 5943 | static int handle_invalid_guest_state(struct kvm_vcpu *vcpu) |
ea953ef0 | 5944 | { |
8b3079a5 AK |
5945 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
5946 | enum emulation_result err = EMULATE_DONE; | |
80ced186 | 5947 | int ret = 1; |
49e9d557 AK |
5948 | u32 cpu_exec_ctrl; |
5949 | bool intr_window_requested; | |
b8405c18 | 5950 | unsigned count = 130; |
49e9d557 AK |
5951 | |
5952 | cpu_exec_ctrl = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL); | |
5953 | intr_window_requested = cpu_exec_ctrl & CPU_BASED_VIRTUAL_INTR_PENDING; | |
ea953ef0 | 5954 | |
98eb2f8b | 5955 | while (vmx->emulation_required && count-- != 0) { |
bdea48e3 | 5956 | if (intr_window_requested && vmx_interrupt_allowed(vcpu)) |
49e9d557 AK |
5957 | return handle_interrupt_window(&vmx->vcpu); |
5958 | ||
de87dcdd AK |
5959 | if (test_bit(KVM_REQ_EVENT, &vcpu->requests)) |
5960 | return 1; | |
5961 | ||
991eebf9 | 5962 | err = emulate_instruction(vcpu, EMULTYPE_NO_REEXECUTE); |
ea953ef0 | 5963 | |
ac0a48c3 | 5964 | if (err == EMULATE_USER_EXIT) { |
94452b9e | 5965 | ++vcpu->stat.mmio_exits; |
80ced186 MG |
5966 | ret = 0; |
5967 | goto out; | |
5968 | } | |
1d5a4d9b | 5969 | |
de5f70e0 AK |
5970 | if (err != EMULATE_DONE) { |
5971 | vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR; | |
5972 | vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION; | |
5973 | vcpu->run->internal.ndata = 0; | |
6d77dbfc | 5974 | return 0; |
de5f70e0 | 5975 | } |
ea953ef0 | 5976 | |
8d76c49e GN |
5977 | if (vcpu->arch.halt_request) { |
5978 | vcpu->arch.halt_request = 0; | |
5cb56059 | 5979 | ret = kvm_vcpu_halt(vcpu); |
8d76c49e GN |
5980 | goto out; |
5981 | } | |
5982 | ||
ea953ef0 | 5983 | if (signal_pending(current)) |
80ced186 | 5984 | goto out; |
ea953ef0 MG |
5985 | if (need_resched()) |
5986 | schedule(); | |
5987 | } | |
5988 | ||
80ced186 MG |
5989 | out: |
5990 | return ret; | |
ea953ef0 MG |
5991 | } |
5992 | ||
b4a2d31d RK |
5993 | static int __grow_ple_window(int val) |
5994 | { | |
5995 | if (ple_window_grow < 1) | |
5996 | return ple_window; | |
5997 | ||
5998 | val = min(val, ple_window_actual_max); | |
5999 | ||
6000 | if (ple_window_grow < ple_window) | |
6001 | val *= ple_window_grow; | |
6002 | else | |
6003 | val += ple_window_grow; | |
6004 | ||
6005 | return val; | |
6006 | } | |
6007 | ||
6008 | static int __shrink_ple_window(int val, int modifier, int minimum) | |
6009 | { | |
6010 | if (modifier < 1) | |
6011 | return ple_window; | |
6012 | ||
6013 | if (modifier < ple_window) | |
6014 | val /= modifier; | |
6015 | else | |
6016 | val -= modifier; | |
6017 | ||
6018 | return max(val, minimum); | |
6019 | } | |
6020 | ||
6021 | static void grow_ple_window(struct kvm_vcpu *vcpu) | |
6022 | { | |
6023 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
6024 | int old = vmx->ple_window; | |
6025 | ||
6026 | vmx->ple_window = __grow_ple_window(old); | |
6027 | ||
6028 | if (vmx->ple_window != old) | |
6029 | vmx->ple_window_dirty = true; | |
7b46268d RK |
6030 | |
6031 | trace_kvm_ple_window_grow(vcpu->vcpu_id, vmx->ple_window, old); | |
b4a2d31d RK |
6032 | } |
6033 | ||
6034 | static void shrink_ple_window(struct kvm_vcpu *vcpu) | |
6035 | { | |
6036 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
6037 | int old = vmx->ple_window; | |
6038 | ||
6039 | vmx->ple_window = __shrink_ple_window(old, | |
6040 | ple_window_shrink, ple_window); | |
6041 | ||
6042 | if (vmx->ple_window != old) | |
6043 | vmx->ple_window_dirty = true; | |
7b46268d RK |
6044 | |
6045 | trace_kvm_ple_window_shrink(vcpu->vcpu_id, vmx->ple_window, old); | |
b4a2d31d RK |
6046 | } |
6047 | ||
6048 | /* | |
6049 | * ple_window_actual_max is computed to be one grow_ple_window() below | |
6050 | * ple_window_max. (See __grow_ple_window for the reason.) | |
6051 | * This prevents overflows, because ple_window_max is int. | |
6052 | * ple_window_max effectively rounded down to a multiple of ple_window_grow in | |
6053 | * this process. | |
6054 | * ple_window_max is also prevented from setting vmx->ple_window < ple_window. | |
6055 | */ | |
6056 | static void update_ple_window_actual_max(void) | |
6057 | { | |
6058 | ple_window_actual_max = | |
6059 | __shrink_ple_window(max(ple_window_max, ple_window), | |
6060 | ple_window_grow, INT_MIN); | |
6061 | } | |
6062 | ||
bf9f6ac8 FW |
6063 | /* |
6064 | * Handler for POSTED_INTERRUPT_WAKEUP_VECTOR. | |
6065 | */ | |
6066 | static void wakeup_handler(void) | |
6067 | { | |
6068 | struct kvm_vcpu *vcpu; | |
6069 | int cpu = smp_processor_id(); | |
6070 | ||
6071 | spin_lock(&per_cpu(blocked_vcpu_on_cpu_lock, cpu)); | |
6072 | list_for_each_entry(vcpu, &per_cpu(blocked_vcpu_on_cpu, cpu), | |
6073 | blocked_vcpu_list) { | |
6074 | struct pi_desc *pi_desc = vcpu_to_pi_desc(vcpu); | |
6075 | ||
6076 | if (pi_test_on(pi_desc) == 1) | |
6077 | kvm_vcpu_kick(vcpu); | |
6078 | } | |
6079 | spin_unlock(&per_cpu(blocked_vcpu_on_cpu_lock, cpu)); | |
6080 | } | |
6081 | ||
f2c7648d TC |
6082 | static __init int hardware_setup(void) |
6083 | { | |
34a1cd60 TC |
6084 | int r = -ENOMEM, i, msr; |
6085 | ||
6086 | rdmsrl_safe(MSR_EFER, &host_efer); | |
6087 | ||
6088 | for (i = 0; i < ARRAY_SIZE(vmx_msr_index); ++i) | |
6089 | kvm_define_shared_msr(i, vmx_msr_index[i]); | |
6090 | ||
6091 | vmx_io_bitmap_a = (unsigned long *)__get_free_page(GFP_KERNEL); | |
6092 | if (!vmx_io_bitmap_a) | |
6093 | return r; | |
6094 | ||
6095 | vmx_io_bitmap_b = (unsigned long *)__get_free_page(GFP_KERNEL); | |
6096 | if (!vmx_io_bitmap_b) | |
6097 | goto out; | |
6098 | ||
6099 | vmx_msr_bitmap_legacy = (unsigned long *)__get_free_page(GFP_KERNEL); | |
6100 | if (!vmx_msr_bitmap_legacy) | |
6101 | goto out1; | |
6102 | ||
6103 | vmx_msr_bitmap_legacy_x2apic = | |
6104 | (unsigned long *)__get_free_page(GFP_KERNEL); | |
6105 | if (!vmx_msr_bitmap_legacy_x2apic) | |
6106 | goto out2; | |
6107 | ||
6108 | vmx_msr_bitmap_longmode = (unsigned long *)__get_free_page(GFP_KERNEL); | |
6109 | if (!vmx_msr_bitmap_longmode) | |
6110 | goto out3; | |
6111 | ||
6112 | vmx_msr_bitmap_longmode_x2apic = | |
6113 | (unsigned long *)__get_free_page(GFP_KERNEL); | |
6114 | if (!vmx_msr_bitmap_longmode_x2apic) | |
6115 | goto out4; | |
3af18d9c WV |
6116 | |
6117 | if (nested) { | |
6118 | vmx_msr_bitmap_nested = | |
6119 | (unsigned long *)__get_free_page(GFP_KERNEL); | |
6120 | if (!vmx_msr_bitmap_nested) | |
6121 | goto out5; | |
6122 | } | |
6123 | ||
34a1cd60 TC |
6124 | vmx_vmread_bitmap = (unsigned long *)__get_free_page(GFP_KERNEL); |
6125 | if (!vmx_vmread_bitmap) | |
3af18d9c | 6126 | goto out6; |
34a1cd60 TC |
6127 | |
6128 | vmx_vmwrite_bitmap = (unsigned long *)__get_free_page(GFP_KERNEL); | |
6129 | if (!vmx_vmwrite_bitmap) | |
3af18d9c | 6130 | goto out7; |
34a1cd60 TC |
6131 | |
6132 | memset(vmx_vmread_bitmap, 0xff, PAGE_SIZE); | |
6133 | memset(vmx_vmwrite_bitmap, 0xff, PAGE_SIZE); | |
6134 | ||
6135 | /* | |
6136 | * Allow direct access to the PC debug port (it is often used for I/O | |
6137 | * delays, but the vmexits simply slow things down). | |
6138 | */ | |
6139 | memset(vmx_io_bitmap_a, 0xff, PAGE_SIZE); | |
6140 | clear_bit(0x80, vmx_io_bitmap_a); | |
6141 | ||
6142 | memset(vmx_io_bitmap_b, 0xff, PAGE_SIZE); | |
6143 | ||
6144 | memset(vmx_msr_bitmap_legacy, 0xff, PAGE_SIZE); | |
6145 | memset(vmx_msr_bitmap_longmode, 0xff, PAGE_SIZE); | |
3af18d9c WV |
6146 | if (nested) |
6147 | memset(vmx_msr_bitmap_nested, 0xff, PAGE_SIZE); | |
34a1cd60 | 6148 | |
34a1cd60 TC |
6149 | if (setup_vmcs_config(&vmcs_config) < 0) { |
6150 | r = -EIO; | |
3af18d9c | 6151 | goto out8; |
baa03522 | 6152 | } |
f2c7648d TC |
6153 | |
6154 | if (boot_cpu_has(X86_FEATURE_NX)) | |
6155 | kvm_enable_efer_bits(EFER_NX); | |
6156 | ||
6157 | if (!cpu_has_vmx_vpid()) | |
6158 | enable_vpid = 0; | |
6159 | if (!cpu_has_vmx_shadow_vmcs()) | |
6160 | enable_shadow_vmcs = 0; | |
6161 | if (enable_shadow_vmcs) | |
6162 | init_vmcs_shadow_fields(); | |
6163 | ||
6164 | if (!cpu_has_vmx_ept() || | |
6165 | !cpu_has_vmx_ept_4levels()) { | |
6166 | enable_ept = 0; | |
6167 | enable_unrestricted_guest = 0; | |
6168 | enable_ept_ad_bits = 0; | |
6169 | } | |
6170 | ||
6171 | if (!cpu_has_vmx_ept_ad_bits()) | |
6172 | enable_ept_ad_bits = 0; | |
6173 | ||
6174 | if (!cpu_has_vmx_unrestricted_guest()) | |
6175 | enable_unrestricted_guest = 0; | |
6176 | ||
ad15a296 | 6177 | if (!cpu_has_vmx_flexpriority()) |
f2c7648d TC |
6178 | flexpriority_enabled = 0; |
6179 | ||
ad15a296 PB |
6180 | /* |
6181 | * set_apic_access_page_addr() is used to reload apic access | |
6182 | * page upon invalidation. No need to do anything if not | |
6183 | * using the APIC_ACCESS_ADDR VMCS field. | |
6184 | */ | |
6185 | if (!flexpriority_enabled) | |
f2c7648d | 6186 | kvm_x86_ops->set_apic_access_page_addr = NULL; |
f2c7648d TC |
6187 | |
6188 | if (!cpu_has_vmx_tpr_shadow()) | |
6189 | kvm_x86_ops->update_cr8_intercept = NULL; | |
6190 | ||
6191 | if (enable_ept && !cpu_has_vmx_ept_2m_page()) | |
6192 | kvm_disable_largepages(); | |
6193 | ||
6194 | if (!cpu_has_vmx_ple()) | |
6195 | ple_gap = 0; | |
6196 | ||
6197 | if (!cpu_has_vmx_apicv()) | |
6198 | enable_apicv = 0; | |
6199 | ||
64903d61 HZ |
6200 | if (cpu_has_vmx_tsc_scaling()) { |
6201 | kvm_has_tsc_control = true; | |
6202 | kvm_max_tsc_scaling_ratio = KVM_VMX_TSC_MULTIPLIER_MAX; | |
6203 | kvm_tsc_scaling_ratio_frac_bits = 48; | |
6204 | } | |
6205 | ||
f2c7648d TC |
6206 | if (enable_apicv) |
6207 | kvm_x86_ops->update_cr8_intercept = NULL; | |
6208 | else { | |
6209 | kvm_x86_ops->hwapic_irr_update = NULL; | |
b4eef9b3 | 6210 | kvm_x86_ops->hwapic_isr_update = NULL; |
f2c7648d TC |
6211 | kvm_x86_ops->deliver_posted_interrupt = NULL; |
6212 | kvm_x86_ops->sync_pir_to_irr = vmx_sync_pir_to_irr_dummy; | |
6213 | } | |
6214 | ||
baa03522 TC |
6215 | vmx_disable_intercept_for_msr(MSR_FS_BASE, false); |
6216 | vmx_disable_intercept_for_msr(MSR_GS_BASE, false); | |
6217 | vmx_disable_intercept_for_msr(MSR_KERNEL_GS_BASE, true); | |
6218 | vmx_disable_intercept_for_msr(MSR_IA32_SYSENTER_CS, false); | |
6219 | vmx_disable_intercept_for_msr(MSR_IA32_SYSENTER_ESP, false); | |
6220 | vmx_disable_intercept_for_msr(MSR_IA32_SYSENTER_EIP, false); | |
6221 | vmx_disable_intercept_for_msr(MSR_IA32_BNDCFGS, true); | |
6222 | ||
6223 | memcpy(vmx_msr_bitmap_legacy_x2apic, | |
6224 | vmx_msr_bitmap_legacy, PAGE_SIZE); | |
6225 | memcpy(vmx_msr_bitmap_longmode_x2apic, | |
6226 | vmx_msr_bitmap_longmode, PAGE_SIZE); | |
6227 | ||
04bb92e4 WL |
6228 | set_bit(0, vmx_vpid_bitmap); /* 0 is reserved for host */ |
6229 | ||
baa03522 TC |
6230 | if (enable_apicv) { |
6231 | for (msr = 0x800; msr <= 0x8ff; msr++) | |
6232 | vmx_disable_intercept_msr_read_x2apic(msr); | |
6233 | ||
6234 | /* According SDM, in x2apic mode, the whole id reg is used. | |
6235 | * But in KVM, it only use the highest eight bits. Need to | |
6236 | * intercept it */ | |
6237 | vmx_enable_intercept_msr_read_x2apic(0x802); | |
6238 | /* TMCCT */ | |
6239 | vmx_enable_intercept_msr_read_x2apic(0x839); | |
6240 | /* TPR */ | |
6241 | vmx_disable_intercept_msr_write_x2apic(0x808); | |
6242 | /* EOI */ | |
6243 | vmx_disable_intercept_msr_write_x2apic(0x80b); | |
6244 | /* SELF-IPI */ | |
6245 | vmx_disable_intercept_msr_write_x2apic(0x83f); | |
6246 | } | |
6247 | ||
6248 | if (enable_ept) { | |
6249 | kvm_mmu_set_mask_ptes(0ull, | |
6250 | (enable_ept_ad_bits) ? VMX_EPT_ACCESS_BIT : 0ull, | |
6251 | (enable_ept_ad_bits) ? VMX_EPT_DIRTY_BIT : 0ull, | |
6252 | 0ull, VMX_EPT_EXECUTABLE_MASK); | |
6253 | ept_set_mmio_spte_mask(); | |
6254 | kvm_enable_tdp(); | |
6255 | } else | |
6256 | kvm_disable_tdp(); | |
6257 | ||
6258 | update_ple_window_actual_max(); | |
6259 | ||
843e4330 KH |
6260 | /* |
6261 | * Only enable PML when hardware supports PML feature, and both EPT | |
6262 | * and EPT A/D bit features are enabled -- PML depends on them to work. | |
6263 | */ | |
6264 | if (!enable_ept || !enable_ept_ad_bits || !cpu_has_vmx_pml()) | |
6265 | enable_pml = 0; | |
6266 | ||
6267 | if (!enable_pml) { | |
6268 | kvm_x86_ops->slot_enable_log_dirty = NULL; | |
6269 | kvm_x86_ops->slot_disable_log_dirty = NULL; | |
6270 | kvm_x86_ops->flush_log_dirty = NULL; | |
6271 | kvm_x86_ops->enable_log_dirty_pt_masked = NULL; | |
6272 | } | |
6273 | ||
bf9f6ac8 FW |
6274 | kvm_set_posted_intr_wakeup_handler(wakeup_handler); |
6275 | ||
f2c7648d | 6276 | return alloc_kvm_area(); |
34a1cd60 | 6277 | |
3af18d9c | 6278 | out8: |
34a1cd60 | 6279 | free_page((unsigned long)vmx_vmwrite_bitmap); |
3af18d9c | 6280 | out7: |
34a1cd60 | 6281 | free_page((unsigned long)vmx_vmread_bitmap); |
3af18d9c WV |
6282 | out6: |
6283 | if (nested) | |
6284 | free_page((unsigned long)vmx_msr_bitmap_nested); | |
34a1cd60 TC |
6285 | out5: |
6286 | free_page((unsigned long)vmx_msr_bitmap_longmode_x2apic); | |
6287 | out4: | |
6288 | free_page((unsigned long)vmx_msr_bitmap_longmode); | |
6289 | out3: | |
6290 | free_page((unsigned long)vmx_msr_bitmap_legacy_x2apic); | |
6291 | out2: | |
6292 | free_page((unsigned long)vmx_msr_bitmap_legacy); | |
6293 | out1: | |
6294 | free_page((unsigned long)vmx_io_bitmap_b); | |
6295 | out: | |
6296 | free_page((unsigned long)vmx_io_bitmap_a); | |
6297 | ||
6298 | return r; | |
f2c7648d TC |
6299 | } |
6300 | ||
6301 | static __exit void hardware_unsetup(void) | |
6302 | { | |
34a1cd60 TC |
6303 | free_page((unsigned long)vmx_msr_bitmap_legacy_x2apic); |
6304 | free_page((unsigned long)vmx_msr_bitmap_longmode_x2apic); | |
6305 | free_page((unsigned long)vmx_msr_bitmap_legacy); | |
6306 | free_page((unsigned long)vmx_msr_bitmap_longmode); | |
6307 | free_page((unsigned long)vmx_io_bitmap_b); | |
6308 | free_page((unsigned long)vmx_io_bitmap_a); | |
6309 | free_page((unsigned long)vmx_vmwrite_bitmap); | |
6310 | free_page((unsigned long)vmx_vmread_bitmap); | |
3af18d9c WV |
6311 | if (nested) |
6312 | free_page((unsigned long)vmx_msr_bitmap_nested); | |
34a1cd60 | 6313 | |
f2c7648d TC |
6314 | free_kvm_area(); |
6315 | } | |
6316 | ||
4b8d54f9 ZE |
6317 | /* |
6318 | * Indicate a busy-waiting vcpu in spinlock. We do not enable the PAUSE | |
6319 | * exiting, so only get here on cpu with PAUSE-Loop-Exiting. | |
6320 | */ | |
9fb41ba8 | 6321 | static int handle_pause(struct kvm_vcpu *vcpu) |
4b8d54f9 | 6322 | { |
b4a2d31d RK |
6323 | if (ple_gap) |
6324 | grow_ple_window(vcpu); | |
6325 | ||
4b8d54f9 ZE |
6326 | skip_emulated_instruction(vcpu); |
6327 | kvm_vcpu_on_spin(vcpu); | |
6328 | ||
6329 | return 1; | |
6330 | } | |
6331 | ||
87c00572 | 6332 | static int handle_nop(struct kvm_vcpu *vcpu) |
59708670 | 6333 | { |
87c00572 | 6334 | skip_emulated_instruction(vcpu); |
59708670 SY |
6335 | return 1; |
6336 | } | |
6337 | ||
87c00572 GS |
6338 | static int handle_mwait(struct kvm_vcpu *vcpu) |
6339 | { | |
6340 | printk_once(KERN_WARNING "kvm: MWAIT instruction emulated as NOP!\n"); | |
6341 | return handle_nop(vcpu); | |
6342 | } | |
6343 | ||
5f3d45e7 MD |
6344 | static int handle_monitor_trap(struct kvm_vcpu *vcpu) |
6345 | { | |
6346 | return 1; | |
6347 | } | |
6348 | ||
87c00572 GS |
6349 | static int handle_monitor(struct kvm_vcpu *vcpu) |
6350 | { | |
6351 | printk_once(KERN_WARNING "kvm: MONITOR instruction emulated as NOP!\n"); | |
6352 | return handle_nop(vcpu); | |
6353 | } | |
6354 | ||
ff2f6fe9 NHE |
6355 | /* |
6356 | * To run an L2 guest, we need a vmcs02 based on the L1-specified vmcs12. | |
6357 | * We could reuse a single VMCS for all the L2 guests, but we also want the | |
6358 | * option to allocate a separate vmcs02 for each separate loaded vmcs12 - this | |
6359 | * allows keeping them loaded on the processor, and in the future will allow | |
6360 | * optimizations where prepare_vmcs02 doesn't need to set all the fields on | |
6361 | * every entry if they never change. | |
6362 | * So we keep, in vmx->nested.vmcs02_pool, a cache of size VMCS02_POOL_SIZE | |
6363 | * (>=0) with a vmcs02 for each recently loaded vmcs12s, most recent first. | |
6364 | * | |
6365 | * The following functions allocate and free a vmcs02 in this pool. | |
6366 | */ | |
6367 | ||
6368 | /* Get a VMCS from the pool to use as vmcs02 for the current vmcs12. */ | |
6369 | static struct loaded_vmcs *nested_get_current_vmcs02(struct vcpu_vmx *vmx) | |
6370 | { | |
6371 | struct vmcs02_list *item; | |
6372 | list_for_each_entry(item, &vmx->nested.vmcs02_pool, list) | |
6373 | if (item->vmptr == vmx->nested.current_vmptr) { | |
6374 | list_move(&item->list, &vmx->nested.vmcs02_pool); | |
6375 | return &item->vmcs02; | |
6376 | } | |
6377 | ||
6378 | if (vmx->nested.vmcs02_num >= max(VMCS02_POOL_SIZE, 1)) { | |
6379 | /* Recycle the least recently used VMCS. */ | |
6380 | item = list_entry(vmx->nested.vmcs02_pool.prev, | |
6381 | struct vmcs02_list, list); | |
6382 | item->vmptr = vmx->nested.current_vmptr; | |
6383 | list_move(&item->list, &vmx->nested.vmcs02_pool); | |
6384 | return &item->vmcs02; | |
6385 | } | |
6386 | ||
6387 | /* Create a new VMCS */ | |
0fa24ce3 | 6388 | item = kmalloc(sizeof(struct vmcs02_list), GFP_KERNEL); |
ff2f6fe9 NHE |
6389 | if (!item) |
6390 | return NULL; | |
6391 | item->vmcs02.vmcs = alloc_vmcs(); | |
6392 | if (!item->vmcs02.vmcs) { | |
6393 | kfree(item); | |
6394 | return NULL; | |
6395 | } | |
6396 | loaded_vmcs_init(&item->vmcs02); | |
6397 | item->vmptr = vmx->nested.current_vmptr; | |
6398 | list_add(&(item->list), &(vmx->nested.vmcs02_pool)); | |
6399 | vmx->nested.vmcs02_num++; | |
6400 | return &item->vmcs02; | |
6401 | } | |
6402 | ||
6403 | /* Free and remove from pool a vmcs02 saved for a vmcs12 (if there is one) */ | |
6404 | static void nested_free_vmcs02(struct vcpu_vmx *vmx, gpa_t vmptr) | |
6405 | { | |
6406 | struct vmcs02_list *item; | |
6407 | list_for_each_entry(item, &vmx->nested.vmcs02_pool, list) | |
6408 | if (item->vmptr == vmptr) { | |
6409 | free_loaded_vmcs(&item->vmcs02); | |
6410 | list_del(&item->list); | |
6411 | kfree(item); | |
6412 | vmx->nested.vmcs02_num--; | |
6413 | return; | |
6414 | } | |
6415 | } | |
6416 | ||
6417 | /* | |
6418 | * Free all VMCSs saved for this vcpu, except the one pointed by | |
4fa7734c PB |
6419 | * vmx->loaded_vmcs. We must be running L1, so vmx->loaded_vmcs |
6420 | * must be &vmx->vmcs01. | |
ff2f6fe9 NHE |
6421 | */ |
6422 | static void nested_free_all_saved_vmcss(struct vcpu_vmx *vmx) | |
6423 | { | |
6424 | struct vmcs02_list *item, *n; | |
4fa7734c PB |
6425 | |
6426 | WARN_ON(vmx->loaded_vmcs != &vmx->vmcs01); | |
ff2f6fe9 | 6427 | list_for_each_entry_safe(item, n, &vmx->nested.vmcs02_pool, list) { |
4fa7734c PB |
6428 | /* |
6429 | * Something will leak if the above WARN triggers. Better than | |
6430 | * a use-after-free. | |
6431 | */ | |
6432 | if (vmx->loaded_vmcs == &item->vmcs02) | |
6433 | continue; | |
6434 | ||
6435 | free_loaded_vmcs(&item->vmcs02); | |
ff2f6fe9 NHE |
6436 | list_del(&item->list); |
6437 | kfree(item); | |
4fa7734c | 6438 | vmx->nested.vmcs02_num--; |
ff2f6fe9 | 6439 | } |
ff2f6fe9 NHE |
6440 | } |
6441 | ||
0658fbaa ACL |
6442 | /* |
6443 | * The following 3 functions, nested_vmx_succeed()/failValid()/failInvalid(), | |
6444 | * set the success or error code of an emulated VMX instruction, as specified | |
6445 | * by Vol 2B, VMX Instruction Reference, "Conventions". | |
6446 | */ | |
6447 | static void nested_vmx_succeed(struct kvm_vcpu *vcpu) | |
6448 | { | |
6449 | vmx_set_rflags(vcpu, vmx_get_rflags(vcpu) | |
6450 | & ~(X86_EFLAGS_CF | X86_EFLAGS_PF | X86_EFLAGS_AF | | |
6451 | X86_EFLAGS_ZF | X86_EFLAGS_SF | X86_EFLAGS_OF)); | |
6452 | } | |
6453 | ||
6454 | static void nested_vmx_failInvalid(struct kvm_vcpu *vcpu) | |
6455 | { | |
6456 | vmx_set_rflags(vcpu, (vmx_get_rflags(vcpu) | |
6457 | & ~(X86_EFLAGS_PF | X86_EFLAGS_AF | X86_EFLAGS_ZF | | |
6458 | X86_EFLAGS_SF | X86_EFLAGS_OF)) | |
6459 | | X86_EFLAGS_CF); | |
6460 | } | |
6461 | ||
145c28dd | 6462 | static void nested_vmx_failValid(struct kvm_vcpu *vcpu, |
0658fbaa ACL |
6463 | u32 vm_instruction_error) |
6464 | { | |
6465 | if (to_vmx(vcpu)->nested.current_vmptr == -1ull) { | |
6466 | /* | |
6467 | * failValid writes the error number to the current VMCS, which | |
6468 | * can't be done there isn't a current VMCS. | |
6469 | */ | |
6470 | nested_vmx_failInvalid(vcpu); | |
6471 | return; | |
6472 | } | |
6473 | vmx_set_rflags(vcpu, (vmx_get_rflags(vcpu) | |
6474 | & ~(X86_EFLAGS_CF | X86_EFLAGS_PF | X86_EFLAGS_AF | | |
6475 | X86_EFLAGS_SF | X86_EFLAGS_OF)) | |
6476 | | X86_EFLAGS_ZF); | |
6477 | get_vmcs12(vcpu)->vm_instruction_error = vm_instruction_error; | |
6478 | /* | |
6479 | * We don't need to force a shadow sync because | |
6480 | * VM_INSTRUCTION_ERROR is not shadowed | |
6481 | */ | |
6482 | } | |
145c28dd | 6483 | |
ff651cb6 WV |
6484 | static void nested_vmx_abort(struct kvm_vcpu *vcpu, u32 indicator) |
6485 | { | |
6486 | /* TODO: not to reset guest simply here. */ | |
6487 | kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu); | |
6488 | pr_warn("kvm: nested vmx abort, indicator %d\n", indicator); | |
6489 | } | |
6490 | ||
f4124500 JK |
6491 | static enum hrtimer_restart vmx_preemption_timer_fn(struct hrtimer *timer) |
6492 | { | |
6493 | struct vcpu_vmx *vmx = | |
6494 | container_of(timer, struct vcpu_vmx, nested.preemption_timer); | |
6495 | ||
6496 | vmx->nested.preemption_timer_expired = true; | |
6497 | kvm_make_request(KVM_REQ_EVENT, &vmx->vcpu); | |
6498 | kvm_vcpu_kick(&vmx->vcpu); | |
6499 | ||
6500 | return HRTIMER_NORESTART; | |
6501 | } | |
6502 | ||
19677e32 BD |
6503 | /* |
6504 | * Decode the memory-address operand of a vmx instruction, as recorded on an | |
6505 | * exit caused by such an instruction (run by a guest hypervisor). | |
6506 | * On success, returns 0. When the operand is invalid, returns 1 and throws | |
6507 | * #UD or #GP. | |
6508 | */ | |
6509 | static int get_vmx_mem_address(struct kvm_vcpu *vcpu, | |
6510 | unsigned long exit_qualification, | |
f9eb4af6 | 6511 | u32 vmx_instruction_info, bool wr, gva_t *ret) |
19677e32 | 6512 | { |
f9eb4af6 EK |
6513 | gva_t off; |
6514 | bool exn; | |
6515 | struct kvm_segment s; | |
6516 | ||
19677e32 BD |
6517 | /* |
6518 | * According to Vol. 3B, "Information for VM Exits Due to Instruction | |
6519 | * Execution", on an exit, vmx_instruction_info holds most of the | |
6520 | * addressing components of the operand. Only the displacement part | |
6521 | * is put in exit_qualification (see 3B, "Basic VM-Exit Information"). | |
6522 | * For how an actual address is calculated from all these components, | |
6523 | * refer to Vol. 1, "Operand Addressing". | |
6524 | */ | |
6525 | int scaling = vmx_instruction_info & 3; | |
6526 | int addr_size = (vmx_instruction_info >> 7) & 7; | |
6527 | bool is_reg = vmx_instruction_info & (1u << 10); | |
6528 | int seg_reg = (vmx_instruction_info >> 15) & 7; | |
6529 | int index_reg = (vmx_instruction_info >> 18) & 0xf; | |
6530 | bool index_is_valid = !(vmx_instruction_info & (1u << 22)); | |
6531 | int base_reg = (vmx_instruction_info >> 23) & 0xf; | |
6532 | bool base_is_valid = !(vmx_instruction_info & (1u << 27)); | |
6533 | ||
6534 | if (is_reg) { | |
6535 | kvm_queue_exception(vcpu, UD_VECTOR); | |
6536 | return 1; | |
6537 | } | |
6538 | ||
6539 | /* Addr = segment_base + offset */ | |
6540 | /* offset = base + [index * scale] + displacement */ | |
f9eb4af6 | 6541 | off = exit_qualification; /* holds the displacement */ |
19677e32 | 6542 | if (base_is_valid) |
f9eb4af6 | 6543 | off += kvm_register_read(vcpu, base_reg); |
19677e32 | 6544 | if (index_is_valid) |
f9eb4af6 EK |
6545 | off += kvm_register_read(vcpu, index_reg)<<scaling; |
6546 | vmx_get_segment(vcpu, &s, seg_reg); | |
6547 | *ret = s.base + off; | |
19677e32 BD |
6548 | |
6549 | if (addr_size == 1) /* 32 bit */ | |
6550 | *ret &= 0xffffffff; | |
6551 | ||
f9eb4af6 EK |
6552 | /* Checks for #GP/#SS exceptions. */ |
6553 | exn = false; | |
6554 | if (is_protmode(vcpu)) { | |
6555 | /* Protected mode: apply checks for segment validity in the | |
6556 | * following order: | |
6557 | * - segment type check (#GP(0) may be thrown) | |
6558 | * - usability check (#GP(0)/#SS(0)) | |
6559 | * - limit check (#GP(0)/#SS(0)) | |
6560 | */ | |
6561 | if (wr) | |
6562 | /* #GP(0) if the destination operand is located in a | |
6563 | * read-only data segment or any code segment. | |
6564 | */ | |
6565 | exn = ((s.type & 0xa) == 0 || (s.type & 8)); | |
6566 | else | |
6567 | /* #GP(0) if the source operand is located in an | |
6568 | * execute-only code segment | |
6569 | */ | |
6570 | exn = ((s.type & 0xa) == 8); | |
6571 | } | |
6572 | if (exn) { | |
6573 | kvm_queue_exception_e(vcpu, GP_VECTOR, 0); | |
6574 | return 1; | |
6575 | } | |
6576 | if (is_long_mode(vcpu)) { | |
6577 | /* Long mode: #GP(0)/#SS(0) if the memory address is in a | |
6578 | * non-canonical form. This is an only check for long mode. | |
6579 | */ | |
6580 | exn = is_noncanonical_address(*ret); | |
6581 | } else if (is_protmode(vcpu)) { | |
6582 | /* Protected mode: #GP(0)/#SS(0) if the segment is unusable. | |
6583 | */ | |
6584 | exn = (s.unusable != 0); | |
6585 | /* Protected mode: #GP(0)/#SS(0) if the memory | |
6586 | * operand is outside the segment limit. | |
6587 | */ | |
6588 | exn = exn || (off + sizeof(u64) > s.limit); | |
6589 | } | |
6590 | if (exn) { | |
6591 | kvm_queue_exception_e(vcpu, | |
6592 | seg_reg == VCPU_SREG_SS ? | |
6593 | SS_VECTOR : GP_VECTOR, | |
6594 | 0); | |
6595 | return 1; | |
6596 | } | |
6597 | ||
19677e32 BD |
6598 | return 0; |
6599 | } | |
6600 | ||
3573e22c BD |
6601 | /* |
6602 | * This function performs the various checks including | |
6603 | * - if it's 4KB aligned | |
6604 | * - No bits beyond the physical address width are set | |
6605 | * - Returns 0 on success or else 1 | |
4291b588 | 6606 | * (Intel SDM Section 30.3) |
3573e22c | 6607 | */ |
4291b588 BD |
6608 | static int nested_vmx_check_vmptr(struct kvm_vcpu *vcpu, int exit_reason, |
6609 | gpa_t *vmpointer) | |
3573e22c BD |
6610 | { |
6611 | gva_t gva; | |
6612 | gpa_t vmptr; | |
6613 | struct x86_exception e; | |
6614 | struct page *page; | |
6615 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
6616 | int maxphyaddr = cpuid_maxphyaddr(vcpu); | |
6617 | ||
6618 | if (get_vmx_mem_address(vcpu, vmcs_readl(EXIT_QUALIFICATION), | |
f9eb4af6 | 6619 | vmcs_read32(VMX_INSTRUCTION_INFO), false, &gva)) |
3573e22c BD |
6620 | return 1; |
6621 | ||
6622 | if (kvm_read_guest_virt(&vcpu->arch.emulate_ctxt, gva, &vmptr, | |
6623 | sizeof(vmptr), &e)) { | |
6624 | kvm_inject_page_fault(vcpu, &e); | |
6625 | return 1; | |
6626 | } | |
6627 | ||
6628 | switch (exit_reason) { | |
6629 | case EXIT_REASON_VMON: | |
6630 | /* | |
6631 | * SDM 3: 24.11.5 | |
6632 | * The first 4 bytes of VMXON region contain the supported | |
6633 | * VMCS revision identifier | |
6634 | * | |
6635 | * Note - IA32_VMX_BASIC[48] will never be 1 | |
6636 | * for the nested case; | |
6637 | * which replaces physical address width with 32 | |
6638 | * | |
6639 | */ | |
bc39c4db | 6640 | if (!PAGE_ALIGNED(vmptr) || (vmptr >> maxphyaddr)) { |
3573e22c BD |
6641 | nested_vmx_failInvalid(vcpu); |
6642 | skip_emulated_instruction(vcpu); | |
6643 | return 1; | |
6644 | } | |
6645 | ||
6646 | page = nested_get_page(vcpu, vmptr); | |
6647 | if (page == NULL || | |
6648 | *(u32 *)kmap(page) != VMCS12_REVISION) { | |
6649 | nested_vmx_failInvalid(vcpu); | |
6650 | kunmap(page); | |
6651 | skip_emulated_instruction(vcpu); | |
6652 | return 1; | |
6653 | } | |
6654 | kunmap(page); | |
6655 | vmx->nested.vmxon_ptr = vmptr; | |
6656 | break; | |
4291b588 | 6657 | case EXIT_REASON_VMCLEAR: |
bc39c4db | 6658 | if (!PAGE_ALIGNED(vmptr) || (vmptr >> maxphyaddr)) { |
4291b588 BD |
6659 | nested_vmx_failValid(vcpu, |
6660 | VMXERR_VMCLEAR_INVALID_ADDRESS); | |
6661 | skip_emulated_instruction(vcpu); | |
6662 | return 1; | |
6663 | } | |
6664 | ||
6665 | if (vmptr == vmx->nested.vmxon_ptr) { | |
6666 | nested_vmx_failValid(vcpu, | |
6667 | VMXERR_VMCLEAR_VMXON_POINTER); | |
6668 | skip_emulated_instruction(vcpu); | |
6669 | return 1; | |
6670 | } | |
6671 | break; | |
6672 | case EXIT_REASON_VMPTRLD: | |
bc39c4db | 6673 | if (!PAGE_ALIGNED(vmptr) || (vmptr >> maxphyaddr)) { |
4291b588 BD |
6674 | nested_vmx_failValid(vcpu, |
6675 | VMXERR_VMPTRLD_INVALID_ADDRESS); | |
6676 | skip_emulated_instruction(vcpu); | |
6677 | return 1; | |
6678 | } | |
3573e22c | 6679 | |
4291b588 BD |
6680 | if (vmptr == vmx->nested.vmxon_ptr) { |
6681 | nested_vmx_failValid(vcpu, | |
6682 | VMXERR_VMCLEAR_VMXON_POINTER); | |
6683 | skip_emulated_instruction(vcpu); | |
6684 | return 1; | |
6685 | } | |
6686 | break; | |
3573e22c BD |
6687 | default: |
6688 | return 1; /* shouldn't happen */ | |
6689 | } | |
6690 | ||
4291b588 BD |
6691 | if (vmpointer) |
6692 | *vmpointer = vmptr; | |
3573e22c BD |
6693 | return 0; |
6694 | } | |
6695 | ||
ec378aee NHE |
6696 | /* |
6697 | * Emulate the VMXON instruction. | |
6698 | * Currently, we just remember that VMX is active, and do not save or even | |
6699 | * inspect the argument to VMXON (the so-called "VMXON pointer") because we | |
6700 | * do not currently need to store anything in that guest-allocated memory | |
6701 | * region. Consequently, VMCLEAR and VMPTRLD also do not verify that the their | |
6702 | * argument is different from the VMXON pointer (which the spec says they do). | |
6703 | */ | |
6704 | static int handle_vmon(struct kvm_vcpu *vcpu) | |
6705 | { | |
6706 | struct kvm_segment cs; | |
6707 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
8de48833 | 6708 | struct vmcs *shadow_vmcs; |
b3897a49 NHE |
6709 | const u64 VMXON_NEEDED_FEATURES = FEATURE_CONTROL_LOCKED |
6710 | | FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX; | |
ec378aee NHE |
6711 | |
6712 | /* The Intel VMX Instruction Reference lists a bunch of bits that | |
6713 | * are prerequisite to running VMXON, most notably cr4.VMXE must be | |
6714 | * set to 1 (see vmx_set_cr4() for when we allow the guest to set this). | |
6715 | * Otherwise, we should fail with #UD. We test these now: | |
6716 | */ | |
6717 | if (!kvm_read_cr4_bits(vcpu, X86_CR4_VMXE) || | |
6718 | !kvm_read_cr0_bits(vcpu, X86_CR0_PE) || | |
6719 | (vmx_get_rflags(vcpu) & X86_EFLAGS_VM)) { | |
6720 | kvm_queue_exception(vcpu, UD_VECTOR); | |
6721 | return 1; | |
6722 | } | |
6723 | ||
6724 | vmx_get_segment(vcpu, &cs, VCPU_SREG_CS); | |
6725 | if (is_long_mode(vcpu) && !cs.l) { | |
6726 | kvm_queue_exception(vcpu, UD_VECTOR); | |
6727 | return 1; | |
6728 | } | |
6729 | ||
6730 | if (vmx_get_cpl(vcpu)) { | |
6731 | kvm_inject_gp(vcpu, 0); | |
6732 | return 1; | |
6733 | } | |
3573e22c | 6734 | |
4291b588 | 6735 | if (nested_vmx_check_vmptr(vcpu, EXIT_REASON_VMON, NULL)) |
3573e22c BD |
6736 | return 1; |
6737 | ||
145c28dd AG |
6738 | if (vmx->nested.vmxon) { |
6739 | nested_vmx_failValid(vcpu, VMXERR_VMXON_IN_VMX_ROOT_OPERATION); | |
6740 | skip_emulated_instruction(vcpu); | |
6741 | return 1; | |
6742 | } | |
b3897a49 NHE |
6743 | |
6744 | if ((vmx->nested.msr_ia32_feature_control & VMXON_NEEDED_FEATURES) | |
6745 | != VMXON_NEEDED_FEATURES) { | |
6746 | kvm_inject_gp(vcpu, 0); | |
6747 | return 1; | |
6748 | } | |
6749 | ||
8de48833 AG |
6750 | if (enable_shadow_vmcs) { |
6751 | shadow_vmcs = alloc_vmcs(); | |
6752 | if (!shadow_vmcs) | |
6753 | return -ENOMEM; | |
6754 | /* mark vmcs as shadow */ | |
6755 | shadow_vmcs->revision_id |= (1u << 31); | |
6756 | /* init shadow vmcs */ | |
6757 | vmcs_clear(shadow_vmcs); | |
6758 | vmx->nested.current_shadow_vmcs = shadow_vmcs; | |
6759 | } | |
ec378aee | 6760 | |
ff2f6fe9 NHE |
6761 | INIT_LIST_HEAD(&(vmx->nested.vmcs02_pool)); |
6762 | vmx->nested.vmcs02_num = 0; | |
6763 | ||
f4124500 JK |
6764 | hrtimer_init(&vmx->nested.preemption_timer, CLOCK_MONOTONIC, |
6765 | HRTIMER_MODE_REL); | |
6766 | vmx->nested.preemption_timer.function = vmx_preemption_timer_fn; | |
6767 | ||
ec378aee NHE |
6768 | vmx->nested.vmxon = true; |
6769 | ||
6770 | skip_emulated_instruction(vcpu); | |
a25eb114 | 6771 | nested_vmx_succeed(vcpu); |
ec378aee NHE |
6772 | return 1; |
6773 | } | |
6774 | ||
6775 | /* | |
6776 | * Intel's VMX Instruction Reference specifies a common set of prerequisites | |
6777 | * for running VMX instructions (except VMXON, whose prerequisites are | |
6778 | * slightly different). It also specifies what exception to inject otherwise. | |
6779 | */ | |
6780 | static int nested_vmx_check_permission(struct kvm_vcpu *vcpu) | |
6781 | { | |
6782 | struct kvm_segment cs; | |
6783 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
6784 | ||
6785 | if (!vmx->nested.vmxon) { | |
6786 | kvm_queue_exception(vcpu, UD_VECTOR); | |
6787 | return 0; | |
6788 | } | |
6789 | ||
6790 | vmx_get_segment(vcpu, &cs, VCPU_SREG_CS); | |
6791 | if ((vmx_get_rflags(vcpu) & X86_EFLAGS_VM) || | |
6792 | (is_long_mode(vcpu) && !cs.l)) { | |
6793 | kvm_queue_exception(vcpu, UD_VECTOR); | |
6794 | return 0; | |
6795 | } | |
6796 | ||
6797 | if (vmx_get_cpl(vcpu)) { | |
6798 | kvm_inject_gp(vcpu, 0); | |
6799 | return 0; | |
6800 | } | |
6801 | ||
6802 | return 1; | |
6803 | } | |
6804 | ||
e7953d7f AG |
6805 | static inline void nested_release_vmcs12(struct vcpu_vmx *vmx) |
6806 | { | |
9a2a05b9 PB |
6807 | if (vmx->nested.current_vmptr == -1ull) |
6808 | return; | |
6809 | ||
6810 | /* current_vmptr and current_vmcs12 are always set/reset together */ | |
6811 | if (WARN_ON(vmx->nested.current_vmcs12 == NULL)) | |
6812 | return; | |
6813 | ||
012f83cb | 6814 | if (enable_shadow_vmcs) { |
9a2a05b9 PB |
6815 | /* copy to memory all shadowed fields in case |
6816 | they were modified */ | |
6817 | copy_shadow_to_vmcs12(vmx); | |
6818 | vmx->nested.sync_shadow_vmcs = false; | |
7ec36296 XG |
6819 | vmcs_clear_bits(SECONDARY_VM_EXEC_CONTROL, |
6820 | SECONDARY_EXEC_SHADOW_VMCS); | |
9a2a05b9 | 6821 | vmcs_write64(VMCS_LINK_POINTER, -1ull); |
012f83cb | 6822 | } |
705699a1 | 6823 | vmx->nested.posted_intr_nv = -1; |
e7953d7f AG |
6824 | kunmap(vmx->nested.current_vmcs12_page); |
6825 | nested_release_page(vmx->nested.current_vmcs12_page); | |
9a2a05b9 PB |
6826 | vmx->nested.current_vmptr = -1ull; |
6827 | vmx->nested.current_vmcs12 = NULL; | |
e7953d7f AG |
6828 | } |
6829 | ||
ec378aee NHE |
6830 | /* |
6831 | * Free whatever needs to be freed from vmx->nested when L1 goes down, or | |
6832 | * just stops using VMX. | |
6833 | */ | |
6834 | static void free_nested(struct vcpu_vmx *vmx) | |
6835 | { | |
6836 | if (!vmx->nested.vmxon) | |
6837 | return; | |
9a2a05b9 | 6838 | |
ec378aee | 6839 | vmx->nested.vmxon = false; |
5c614b35 | 6840 | free_vpid(vmx->nested.vpid02); |
9a2a05b9 | 6841 | nested_release_vmcs12(vmx); |
e7953d7f AG |
6842 | if (enable_shadow_vmcs) |
6843 | free_vmcs(vmx->nested.current_shadow_vmcs); | |
fe3ef05c NHE |
6844 | /* Unpin physical memory we referred to in current vmcs02 */ |
6845 | if (vmx->nested.apic_access_page) { | |
6846 | nested_release_page(vmx->nested.apic_access_page); | |
48d89b92 | 6847 | vmx->nested.apic_access_page = NULL; |
fe3ef05c | 6848 | } |
a7c0b07d WL |
6849 | if (vmx->nested.virtual_apic_page) { |
6850 | nested_release_page(vmx->nested.virtual_apic_page); | |
48d89b92 | 6851 | vmx->nested.virtual_apic_page = NULL; |
a7c0b07d | 6852 | } |
705699a1 WV |
6853 | if (vmx->nested.pi_desc_page) { |
6854 | kunmap(vmx->nested.pi_desc_page); | |
6855 | nested_release_page(vmx->nested.pi_desc_page); | |
6856 | vmx->nested.pi_desc_page = NULL; | |
6857 | vmx->nested.pi_desc = NULL; | |
6858 | } | |
ff2f6fe9 NHE |
6859 | |
6860 | nested_free_all_saved_vmcss(vmx); | |
ec378aee NHE |
6861 | } |
6862 | ||
6863 | /* Emulate the VMXOFF instruction */ | |
6864 | static int handle_vmoff(struct kvm_vcpu *vcpu) | |
6865 | { | |
6866 | if (!nested_vmx_check_permission(vcpu)) | |
6867 | return 1; | |
6868 | free_nested(to_vmx(vcpu)); | |
6869 | skip_emulated_instruction(vcpu); | |
a25eb114 | 6870 | nested_vmx_succeed(vcpu); |
ec378aee NHE |
6871 | return 1; |
6872 | } | |
6873 | ||
27d6c865 NHE |
6874 | /* Emulate the VMCLEAR instruction */ |
6875 | static int handle_vmclear(struct kvm_vcpu *vcpu) | |
6876 | { | |
6877 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
27d6c865 NHE |
6878 | gpa_t vmptr; |
6879 | struct vmcs12 *vmcs12; | |
6880 | struct page *page; | |
27d6c865 NHE |
6881 | |
6882 | if (!nested_vmx_check_permission(vcpu)) | |
6883 | return 1; | |
6884 | ||
4291b588 | 6885 | if (nested_vmx_check_vmptr(vcpu, EXIT_REASON_VMCLEAR, &vmptr)) |
27d6c865 | 6886 | return 1; |
27d6c865 | 6887 | |
9a2a05b9 | 6888 | if (vmptr == vmx->nested.current_vmptr) |
e7953d7f | 6889 | nested_release_vmcs12(vmx); |
27d6c865 NHE |
6890 | |
6891 | page = nested_get_page(vcpu, vmptr); | |
6892 | if (page == NULL) { | |
6893 | /* | |
6894 | * For accurate processor emulation, VMCLEAR beyond available | |
6895 | * physical memory should do nothing at all. However, it is | |
6896 | * possible that a nested vmx bug, not a guest hypervisor bug, | |
6897 | * resulted in this case, so let's shut down before doing any | |
6898 | * more damage: | |
6899 | */ | |
6900 | kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu); | |
6901 | return 1; | |
6902 | } | |
6903 | vmcs12 = kmap(page); | |
6904 | vmcs12->launch_state = 0; | |
6905 | kunmap(page); | |
6906 | nested_release_page(page); | |
6907 | ||
6908 | nested_free_vmcs02(vmx, vmptr); | |
6909 | ||
6910 | skip_emulated_instruction(vcpu); | |
6911 | nested_vmx_succeed(vcpu); | |
6912 | return 1; | |
6913 | } | |
6914 | ||
cd232ad0 NHE |
6915 | static int nested_vmx_run(struct kvm_vcpu *vcpu, bool launch); |
6916 | ||
6917 | /* Emulate the VMLAUNCH instruction */ | |
6918 | static int handle_vmlaunch(struct kvm_vcpu *vcpu) | |
6919 | { | |
6920 | return nested_vmx_run(vcpu, true); | |
6921 | } | |
6922 | ||
6923 | /* Emulate the VMRESUME instruction */ | |
6924 | static int handle_vmresume(struct kvm_vcpu *vcpu) | |
6925 | { | |
6926 | ||
6927 | return nested_vmx_run(vcpu, false); | |
6928 | } | |
6929 | ||
49f705c5 NHE |
6930 | enum vmcs_field_type { |
6931 | VMCS_FIELD_TYPE_U16 = 0, | |
6932 | VMCS_FIELD_TYPE_U64 = 1, | |
6933 | VMCS_FIELD_TYPE_U32 = 2, | |
6934 | VMCS_FIELD_TYPE_NATURAL_WIDTH = 3 | |
6935 | }; | |
6936 | ||
6937 | static inline int vmcs_field_type(unsigned long field) | |
6938 | { | |
6939 | if (0x1 & field) /* the *_HIGH fields are all 32 bit */ | |
6940 | return VMCS_FIELD_TYPE_U32; | |
6941 | return (field >> 13) & 0x3 ; | |
6942 | } | |
6943 | ||
6944 | static inline int vmcs_field_readonly(unsigned long field) | |
6945 | { | |
6946 | return (((field >> 10) & 0x3) == 1); | |
6947 | } | |
6948 | ||
6949 | /* | |
6950 | * Read a vmcs12 field. Since these can have varying lengths and we return | |
6951 | * one type, we chose the biggest type (u64) and zero-extend the return value | |
6952 | * to that size. Note that the caller, handle_vmread, might need to use only | |
6953 | * some of the bits we return here (e.g., on 32-bit guests, only 32 bits of | |
6954 | * 64-bit fields are to be returned). | |
6955 | */ | |
a2ae9df7 PB |
6956 | static inline int vmcs12_read_any(struct kvm_vcpu *vcpu, |
6957 | unsigned long field, u64 *ret) | |
49f705c5 NHE |
6958 | { |
6959 | short offset = vmcs_field_to_offset(field); | |
6960 | char *p; | |
6961 | ||
6962 | if (offset < 0) | |
a2ae9df7 | 6963 | return offset; |
49f705c5 NHE |
6964 | |
6965 | p = ((char *)(get_vmcs12(vcpu))) + offset; | |
6966 | ||
6967 | switch (vmcs_field_type(field)) { | |
6968 | case VMCS_FIELD_TYPE_NATURAL_WIDTH: | |
6969 | *ret = *((natural_width *)p); | |
a2ae9df7 | 6970 | return 0; |
49f705c5 NHE |
6971 | case VMCS_FIELD_TYPE_U16: |
6972 | *ret = *((u16 *)p); | |
a2ae9df7 | 6973 | return 0; |
49f705c5 NHE |
6974 | case VMCS_FIELD_TYPE_U32: |
6975 | *ret = *((u32 *)p); | |
a2ae9df7 | 6976 | return 0; |
49f705c5 NHE |
6977 | case VMCS_FIELD_TYPE_U64: |
6978 | *ret = *((u64 *)p); | |
a2ae9df7 | 6979 | return 0; |
49f705c5 | 6980 | default: |
a2ae9df7 PB |
6981 | WARN_ON(1); |
6982 | return -ENOENT; | |
49f705c5 NHE |
6983 | } |
6984 | } | |
6985 | ||
20b97fea | 6986 | |
a2ae9df7 PB |
6987 | static inline int vmcs12_write_any(struct kvm_vcpu *vcpu, |
6988 | unsigned long field, u64 field_value){ | |
20b97fea AG |
6989 | short offset = vmcs_field_to_offset(field); |
6990 | char *p = ((char *) get_vmcs12(vcpu)) + offset; | |
6991 | if (offset < 0) | |
a2ae9df7 | 6992 | return offset; |
20b97fea AG |
6993 | |
6994 | switch (vmcs_field_type(field)) { | |
6995 | case VMCS_FIELD_TYPE_U16: | |
6996 | *(u16 *)p = field_value; | |
a2ae9df7 | 6997 | return 0; |
20b97fea AG |
6998 | case VMCS_FIELD_TYPE_U32: |
6999 | *(u32 *)p = field_value; | |
a2ae9df7 | 7000 | return 0; |
20b97fea AG |
7001 | case VMCS_FIELD_TYPE_U64: |
7002 | *(u64 *)p = field_value; | |
a2ae9df7 | 7003 | return 0; |
20b97fea AG |
7004 | case VMCS_FIELD_TYPE_NATURAL_WIDTH: |
7005 | *(natural_width *)p = field_value; | |
a2ae9df7 | 7006 | return 0; |
20b97fea | 7007 | default: |
a2ae9df7 PB |
7008 | WARN_ON(1); |
7009 | return -ENOENT; | |
20b97fea AG |
7010 | } |
7011 | ||
7012 | } | |
7013 | ||
16f5b903 AG |
7014 | static void copy_shadow_to_vmcs12(struct vcpu_vmx *vmx) |
7015 | { | |
7016 | int i; | |
7017 | unsigned long field; | |
7018 | u64 field_value; | |
7019 | struct vmcs *shadow_vmcs = vmx->nested.current_shadow_vmcs; | |
c2bae893 MK |
7020 | const unsigned long *fields = shadow_read_write_fields; |
7021 | const int num_fields = max_shadow_read_write_fields; | |
16f5b903 | 7022 | |
282da870 JK |
7023 | preempt_disable(); |
7024 | ||
16f5b903 AG |
7025 | vmcs_load(shadow_vmcs); |
7026 | ||
7027 | for (i = 0; i < num_fields; i++) { | |
7028 | field = fields[i]; | |
7029 | switch (vmcs_field_type(field)) { | |
7030 | case VMCS_FIELD_TYPE_U16: | |
7031 | field_value = vmcs_read16(field); | |
7032 | break; | |
7033 | case VMCS_FIELD_TYPE_U32: | |
7034 | field_value = vmcs_read32(field); | |
7035 | break; | |
7036 | case VMCS_FIELD_TYPE_U64: | |
7037 | field_value = vmcs_read64(field); | |
7038 | break; | |
7039 | case VMCS_FIELD_TYPE_NATURAL_WIDTH: | |
7040 | field_value = vmcs_readl(field); | |
7041 | break; | |
a2ae9df7 PB |
7042 | default: |
7043 | WARN_ON(1); | |
7044 | continue; | |
16f5b903 AG |
7045 | } |
7046 | vmcs12_write_any(&vmx->vcpu, field, field_value); | |
7047 | } | |
7048 | ||
7049 | vmcs_clear(shadow_vmcs); | |
7050 | vmcs_load(vmx->loaded_vmcs->vmcs); | |
282da870 JK |
7051 | |
7052 | preempt_enable(); | |
16f5b903 AG |
7053 | } |
7054 | ||
c3114420 AG |
7055 | static void copy_vmcs12_to_shadow(struct vcpu_vmx *vmx) |
7056 | { | |
c2bae893 MK |
7057 | const unsigned long *fields[] = { |
7058 | shadow_read_write_fields, | |
7059 | shadow_read_only_fields | |
c3114420 | 7060 | }; |
c2bae893 | 7061 | const int max_fields[] = { |
c3114420 AG |
7062 | max_shadow_read_write_fields, |
7063 | max_shadow_read_only_fields | |
7064 | }; | |
7065 | int i, q; | |
7066 | unsigned long field; | |
7067 | u64 field_value = 0; | |
7068 | struct vmcs *shadow_vmcs = vmx->nested.current_shadow_vmcs; | |
7069 | ||
7070 | vmcs_load(shadow_vmcs); | |
7071 | ||
c2bae893 | 7072 | for (q = 0; q < ARRAY_SIZE(fields); q++) { |
c3114420 AG |
7073 | for (i = 0; i < max_fields[q]; i++) { |
7074 | field = fields[q][i]; | |
7075 | vmcs12_read_any(&vmx->vcpu, field, &field_value); | |
7076 | ||
7077 | switch (vmcs_field_type(field)) { | |
7078 | case VMCS_FIELD_TYPE_U16: | |
7079 | vmcs_write16(field, (u16)field_value); | |
7080 | break; | |
7081 | case VMCS_FIELD_TYPE_U32: | |
7082 | vmcs_write32(field, (u32)field_value); | |
7083 | break; | |
7084 | case VMCS_FIELD_TYPE_U64: | |
7085 | vmcs_write64(field, (u64)field_value); | |
7086 | break; | |
7087 | case VMCS_FIELD_TYPE_NATURAL_WIDTH: | |
7088 | vmcs_writel(field, (long)field_value); | |
7089 | break; | |
a2ae9df7 PB |
7090 | default: |
7091 | WARN_ON(1); | |
7092 | break; | |
c3114420 AG |
7093 | } |
7094 | } | |
7095 | } | |
7096 | ||
7097 | vmcs_clear(shadow_vmcs); | |
7098 | vmcs_load(vmx->loaded_vmcs->vmcs); | |
7099 | } | |
7100 | ||
49f705c5 NHE |
7101 | /* |
7102 | * VMX instructions which assume a current vmcs12 (i.e., that VMPTRLD was | |
7103 | * used before) all generate the same failure when it is missing. | |
7104 | */ | |
7105 | static int nested_vmx_check_vmcs12(struct kvm_vcpu *vcpu) | |
7106 | { | |
7107 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
7108 | if (vmx->nested.current_vmptr == -1ull) { | |
7109 | nested_vmx_failInvalid(vcpu); | |
7110 | skip_emulated_instruction(vcpu); | |
7111 | return 0; | |
7112 | } | |
7113 | return 1; | |
7114 | } | |
7115 | ||
7116 | static int handle_vmread(struct kvm_vcpu *vcpu) | |
7117 | { | |
7118 | unsigned long field; | |
7119 | u64 field_value; | |
7120 | unsigned long exit_qualification = vmcs_readl(EXIT_QUALIFICATION); | |
7121 | u32 vmx_instruction_info = vmcs_read32(VMX_INSTRUCTION_INFO); | |
7122 | gva_t gva = 0; | |
7123 | ||
7124 | if (!nested_vmx_check_permission(vcpu) || | |
7125 | !nested_vmx_check_vmcs12(vcpu)) | |
7126 | return 1; | |
7127 | ||
7128 | /* Decode instruction info and find the field to read */ | |
27e6fb5d | 7129 | field = kvm_register_readl(vcpu, (((vmx_instruction_info) >> 28) & 0xf)); |
49f705c5 | 7130 | /* Read the field, zero-extended to a u64 field_value */ |
a2ae9df7 | 7131 | if (vmcs12_read_any(vcpu, field, &field_value) < 0) { |
49f705c5 NHE |
7132 | nested_vmx_failValid(vcpu, VMXERR_UNSUPPORTED_VMCS_COMPONENT); |
7133 | skip_emulated_instruction(vcpu); | |
7134 | return 1; | |
7135 | } | |
7136 | /* | |
7137 | * Now copy part of this value to register or memory, as requested. | |
7138 | * Note that the number of bits actually copied is 32 or 64 depending | |
7139 | * on the guest's mode (32 or 64 bit), not on the given field's length. | |
7140 | */ | |
7141 | if (vmx_instruction_info & (1u << 10)) { | |
27e6fb5d | 7142 | kvm_register_writel(vcpu, (((vmx_instruction_info) >> 3) & 0xf), |
49f705c5 NHE |
7143 | field_value); |
7144 | } else { | |
7145 | if (get_vmx_mem_address(vcpu, exit_qualification, | |
f9eb4af6 | 7146 | vmx_instruction_info, true, &gva)) |
49f705c5 NHE |
7147 | return 1; |
7148 | /* _system ok, as nested_vmx_check_permission verified cpl=0 */ | |
7149 | kvm_write_guest_virt_system(&vcpu->arch.emulate_ctxt, gva, | |
7150 | &field_value, (is_long_mode(vcpu) ? 8 : 4), NULL); | |
7151 | } | |
7152 | ||
7153 | nested_vmx_succeed(vcpu); | |
7154 | skip_emulated_instruction(vcpu); | |
7155 | return 1; | |
7156 | } | |
7157 | ||
7158 | ||
7159 | static int handle_vmwrite(struct kvm_vcpu *vcpu) | |
7160 | { | |
7161 | unsigned long field; | |
7162 | gva_t gva; | |
7163 | unsigned long exit_qualification = vmcs_readl(EXIT_QUALIFICATION); | |
7164 | u32 vmx_instruction_info = vmcs_read32(VMX_INSTRUCTION_INFO); | |
49f705c5 NHE |
7165 | /* The value to write might be 32 or 64 bits, depending on L1's long |
7166 | * mode, and eventually we need to write that into a field of several | |
7167 | * possible lengths. The code below first zero-extends the value to 64 | |
7168 | * bit (field_value), and then copies only the approriate number of | |
7169 | * bits into the vmcs12 field. | |
7170 | */ | |
7171 | u64 field_value = 0; | |
7172 | struct x86_exception e; | |
7173 | ||
7174 | if (!nested_vmx_check_permission(vcpu) || | |
7175 | !nested_vmx_check_vmcs12(vcpu)) | |
7176 | return 1; | |
7177 | ||
7178 | if (vmx_instruction_info & (1u << 10)) | |
27e6fb5d | 7179 | field_value = kvm_register_readl(vcpu, |
49f705c5 NHE |
7180 | (((vmx_instruction_info) >> 3) & 0xf)); |
7181 | else { | |
7182 | if (get_vmx_mem_address(vcpu, exit_qualification, | |
f9eb4af6 | 7183 | vmx_instruction_info, false, &gva)) |
49f705c5 NHE |
7184 | return 1; |
7185 | if (kvm_read_guest_virt(&vcpu->arch.emulate_ctxt, gva, | |
27e6fb5d | 7186 | &field_value, (is_64_bit_mode(vcpu) ? 8 : 4), &e)) { |
49f705c5 NHE |
7187 | kvm_inject_page_fault(vcpu, &e); |
7188 | return 1; | |
7189 | } | |
7190 | } | |
7191 | ||
7192 | ||
27e6fb5d | 7193 | field = kvm_register_readl(vcpu, (((vmx_instruction_info) >> 28) & 0xf)); |
49f705c5 NHE |
7194 | if (vmcs_field_readonly(field)) { |
7195 | nested_vmx_failValid(vcpu, | |
7196 | VMXERR_VMWRITE_READ_ONLY_VMCS_COMPONENT); | |
7197 | skip_emulated_instruction(vcpu); | |
7198 | return 1; | |
7199 | } | |
7200 | ||
a2ae9df7 | 7201 | if (vmcs12_write_any(vcpu, field, field_value) < 0) { |
49f705c5 NHE |
7202 | nested_vmx_failValid(vcpu, VMXERR_UNSUPPORTED_VMCS_COMPONENT); |
7203 | skip_emulated_instruction(vcpu); | |
7204 | return 1; | |
7205 | } | |
7206 | ||
7207 | nested_vmx_succeed(vcpu); | |
7208 | skip_emulated_instruction(vcpu); | |
7209 | return 1; | |
7210 | } | |
7211 | ||
63846663 NHE |
7212 | /* Emulate the VMPTRLD instruction */ |
7213 | static int handle_vmptrld(struct kvm_vcpu *vcpu) | |
7214 | { | |
7215 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
63846663 | 7216 | gpa_t vmptr; |
63846663 NHE |
7217 | |
7218 | if (!nested_vmx_check_permission(vcpu)) | |
7219 | return 1; | |
7220 | ||
4291b588 | 7221 | if (nested_vmx_check_vmptr(vcpu, EXIT_REASON_VMPTRLD, &vmptr)) |
63846663 | 7222 | return 1; |
63846663 NHE |
7223 | |
7224 | if (vmx->nested.current_vmptr != vmptr) { | |
7225 | struct vmcs12 *new_vmcs12; | |
7226 | struct page *page; | |
7227 | page = nested_get_page(vcpu, vmptr); | |
7228 | if (page == NULL) { | |
7229 | nested_vmx_failInvalid(vcpu); | |
7230 | skip_emulated_instruction(vcpu); | |
7231 | return 1; | |
7232 | } | |
7233 | new_vmcs12 = kmap(page); | |
7234 | if (new_vmcs12->revision_id != VMCS12_REVISION) { | |
7235 | kunmap(page); | |
7236 | nested_release_page_clean(page); | |
7237 | nested_vmx_failValid(vcpu, | |
7238 | VMXERR_VMPTRLD_INCORRECT_VMCS_REVISION_ID); | |
7239 | skip_emulated_instruction(vcpu); | |
7240 | return 1; | |
7241 | } | |
63846663 | 7242 | |
9a2a05b9 | 7243 | nested_release_vmcs12(vmx); |
63846663 NHE |
7244 | vmx->nested.current_vmptr = vmptr; |
7245 | vmx->nested.current_vmcs12 = new_vmcs12; | |
7246 | vmx->nested.current_vmcs12_page = page; | |
012f83cb | 7247 | if (enable_shadow_vmcs) { |
7ec36296 XG |
7248 | vmcs_set_bits(SECONDARY_VM_EXEC_CONTROL, |
7249 | SECONDARY_EXEC_SHADOW_VMCS); | |
8a1b9dd0 AG |
7250 | vmcs_write64(VMCS_LINK_POINTER, |
7251 | __pa(vmx->nested.current_shadow_vmcs)); | |
012f83cb AG |
7252 | vmx->nested.sync_shadow_vmcs = true; |
7253 | } | |
63846663 NHE |
7254 | } |
7255 | ||
7256 | nested_vmx_succeed(vcpu); | |
7257 | skip_emulated_instruction(vcpu); | |
7258 | return 1; | |
7259 | } | |
7260 | ||
6a4d7550 NHE |
7261 | /* Emulate the VMPTRST instruction */ |
7262 | static int handle_vmptrst(struct kvm_vcpu *vcpu) | |
7263 | { | |
7264 | unsigned long exit_qualification = vmcs_readl(EXIT_QUALIFICATION); | |
7265 | u32 vmx_instruction_info = vmcs_read32(VMX_INSTRUCTION_INFO); | |
7266 | gva_t vmcs_gva; | |
7267 | struct x86_exception e; | |
7268 | ||
7269 | if (!nested_vmx_check_permission(vcpu)) | |
7270 | return 1; | |
7271 | ||
7272 | if (get_vmx_mem_address(vcpu, exit_qualification, | |
f9eb4af6 | 7273 | vmx_instruction_info, true, &vmcs_gva)) |
6a4d7550 NHE |
7274 | return 1; |
7275 | /* ok to use *_system, as nested_vmx_check_permission verified cpl=0 */ | |
7276 | if (kvm_write_guest_virt_system(&vcpu->arch.emulate_ctxt, vmcs_gva, | |
7277 | (void *)&to_vmx(vcpu)->nested.current_vmptr, | |
7278 | sizeof(u64), &e)) { | |
7279 | kvm_inject_page_fault(vcpu, &e); | |
7280 | return 1; | |
7281 | } | |
7282 | nested_vmx_succeed(vcpu); | |
7283 | skip_emulated_instruction(vcpu); | |
7284 | return 1; | |
7285 | } | |
7286 | ||
bfd0a56b NHE |
7287 | /* Emulate the INVEPT instruction */ |
7288 | static int handle_invept(struct kvm_vcpu *vcpu) | |
7289 | { | |
b9c237bb | 7290 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
bfd0a56b NHE |
7291 | u32 vmx_instruction_info, types; |
7292 | unsigned long type; | |
7293 | gva_t gva; | |
7294 | struct x86_exception e; | |
7295 | struct { | |
7296 | u64 eptp, gpa; | |
7297 | } operand; | |
bfd0a56b | 7298 | |
b9c237bb WV |
7299 | if (!(vmx->nested.nested_vmx_secondary_ctls_high & |
7300 | SECONDARY_EXEC_ENABLE_EPT) || | |
7301 | !(vmx->nested.nested_vmx_ept_caps & VMX_EPT_INVEPT_BIT)) { | |
bfd0a56b NHE |
7302 | kvm_queue_exception(vcpu, UD_VECTOR); |
7303 | return 1; | |
7304 | } | |
7305 | ||
7306 | if (!nested_vmx_check_permission(vcpu)) | |
7307 | return 1; | |
7308 | ||
7309 | if (!kvm_read_cr0_bits(vcpu, X86_CR0_PE)) { | |
7310 | kvm_queue_exception(vcpu, UD_VECTOR); | |
7311 | return 1; | |
7312 | } | |
7313 | ||
7314 | vmx_instruction_info = vmcs_read32(VMX_INSTRUCTION_INFO); | |
27e6fb5d | 7315 | type = kvm_register_readl(vcpu, (vmx_instruction_info >> 28) & 0xf); |
bfd0a56b | 7316 | |
b9c237bb | 7317 | types = (vmx->nested.nested_vmx_ept_caps >> VMX_EPT_EXTENT_SHIFT) & 6; |
bfd0a56b NHE |
7318 | |
7319 | if (!(types & (1UL << type))) { | |
7320 | nested_vmx_failValid(vcpu, | |
7321 | VMXERR_INVALID_OPERAND_TO_INVEPT_INVVPID); | |
7322 | return 1; | |
7323 | } | |
7324 | ||
7325 | /* According to the Intel VMX instruction reference, the memory | |
7326 | * operand is read even if it isn't needed (e.g., for type==global) | |
7327 | */ | |
7328 | if (get_vmx_mem_address(vcpu, vmcs_readl(EXIT_QUALIFICATION), | |
f9eb4af6 | 7329 | vmx_instruction_info, false, &gva)) |
bfd0a56b NHE |
7330 | return 1; |
7331 | if (kvm_read_guest_virt(&vcpu->arch.emulate_ctxt, gva, &operand, | |
7332 | sizeof(operand), &e)) { | |
7333 | kvm_inject_page_fault(vcpu, &e); | |
7334 | return 1; | |
7335 | } | |
7336 | ||
7337 | switch (type) { | |
bfd0a56b NHE |
7338 | case VMX_EPT_EXTENT_GLOBAL: |
7339 | kvm_mmu_sync_roots(vcpu); | |
77c3913b | 7340 | kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); |
bfd0a56b NHE |
7341 | nested_vmx_succeed(vcpu); |
7342 | break; | |
7343 | default: | |
4b855078 | 7344 | /* Trap single context invalidation invept calls */ |
bfd0a56b NHE |
7345 | BUG_ON(1); |
7346 | break; | |
7347 | } | |
7348 | ||
7349 | skip_emulated_instruction(vcpu); | |
7350 | return 1; | |
7351 | } | |
7352 | ||
a642fc30 PM |
7353 | static int handle_invvpid(struct kvm_vcpu *vcpu) |
7354 | { | |
99b83ac8 WL |
7355 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
7356 | u32 vmx_instruction_info; | |
7357 | unsigned long type, types; | |
7358 | gva_t gva; | |
7359 | struct x86_exception e; | |
7360 | int vpid; | |
7361 | ||
7362 | if (!(vmx->nested.nested_vmx_secondary_ctls_high & | |
7363 | SECONDARY_EXEC_ENABLE_VPID) || | |
7364 | !(vmx->nested.nested_vmx_vpid_caps & VMX_VPID_INVVPID_BIT)) { | |
7365 | kvm_queue_exception(vcpu, UD_VECTOR); | |
7366 | return 1; | |
7367 | } | |
7368 | ||
7369 | if (!nested_vmx_check_permission(vcpu)) | |
7370 | return 1; | |
7371 | ||
7372 | vmx_instruction_info = vmcs_read32(VMX_INSTRUCTION_INFO); | |
7373 | type = kvm_register_readl(vcpu, (vmx_instruction_info >> 28) & 0xf); | |
7374 | ||
7375 | types = (vmx->nested.nested_vmx_vpid_caps >> 8) & 0x7; | |
7376 | ||
7377 | if (!(types & (1UL << type))) { | |
7378 | nested_vmx_failValid(vcpu, | |
7379 | VMXERR_INVALID_OPERAND_TO_INVEPT_INVVPID); | |
7380 | return 1; | |
7381 | } | |
7382 | ||
7383 | /* according to the intel vmx instruction reference, the memory | |
7384 | * operand is read even if it isn't needed (e.g., for type==global) | |
7385 | */ | |
7386 | if (get_vmx_mem_address(vcpu, vmcs_readl(EXIT_QUALIFICATION), | |
7387 | vmx_instruction_info, false, &gva)) | |
7388 | return 1; | |
7389 | if (kvm_read_guest_virt(&vcpu->arch.emulate_ctxt, gva, &vpid, | |
7390 | sizeof(u32), &e)) { | |
7391 | kvm_inject_page_fault(vcpu, &e); | |
7392 | return 1; | |
7393 | } | |
7394 | ||
7395 | switch (type) { | |
7396 | case VMX_VPID_EXTENT_ALL_CONTEXT: | |
7397 | if (get_vmcs12(vcpu)->virtual_processor_id == 0) { | |
7398 | nested_vmx_failValid(vcpu, | |
7399 | VMXERR_INVALID_OPERAND_TO_INVEPT_INVVPID); | |
7400 | return 1; | |
7401 | } | |
5c614b35 | 7402 | __vmx_flush_tlb(vcpu, to_vmx(vcpu)->nested.vpid02); |
99b83ac8 WL |
7403 | nested_vmx_succeed(vcpu); |
7404 | break; | |
7405 | default: | |
7406 | /* Trap single context invalidation invvpid calls */ | |
7407 | BUG_ON(1); | |
7408 | break; | |
7409 | } | |
7410 | ||
7411 | skip_emulated_instruction(vcpu); | |
a642fc30 PM |
7412 | return 1; |
7413 | } | |
7414 | ||
843e4330 KH |
7415 | static int handle_pml_full(struct kvm_vcpu *vcpu) |
7416 | { | |
7417 | unsigned long exit_qualification; | |
7418 | ||
7419 | trace_kvm_pml_full(vcpu->vcpu_id); | |
7420 | ||
7421 | exit_qualification = vmcs_readl(EXIT_QUALIFICATION); | |
7422 | ||
7423 | /* | |
7424 | * PML buffer FULL happened while executing iret from NMI, | |
7425 | * "blocked by NMI" bit has to be set before next VM entry. | |
7426 | */ | |
7427 | if (!(to_vmx(vcpu)->idt_vectoring_info & VECTORING_INFO_VALID_MASK) && | |
7428 | cpu_has_virtual_nmis() && | |
7429 | (exit_qualification & INTR_INFO_UNBLOCK_NMI)) | |
7430 | vmcs_set_bits(GUEST_INTERRUPTIBILITY_INFO, | |
7431 | GUEST_INTR_STATE_NMI); | |
7432 | ||
7433 | /* | |
7434 | * PML buffer already flushed at beginning of VMEXIT. Nothing to do | |
7435 | * here.., and there's no userspace involvement needed for PML. | |
7436 | */ | |
7437 | return 1; | |
7438 | } | |
7439 | ||
8b3e34e4 XG |
7440 | static int handle_pcommit(struct kvm_vcpu *vcpu) |
7441 | { | |
7442 | /* we never catch pcommit instruct for L1 guest. */ | |
7443 | WARN_ON(1); | |
7444 | return 1; | |
7445 | } | |
7446 | ||
6aa8b732 AK |
7447 | /* |
7448 | * The exit handlers return 1 if the exit was handled fully and guest execution | |
7449 | * may resume. Otherwise they set the kvm_run parameter to indicate what needs | |
7450 | * to be done to userspace and return 0. | |
7451 | */ | |
772e0318 | 7452 | static int (*const kvm_vmx_exit_handlers[])(struct kvm_vcpu *vcpu) = { |
6aa8b732 AK |
7453 | [EXIT_REASON_EXCEPTION_NMI] = handle_exception, |
7454 | [EXIT_REASON_EXTERNAL_INTERRUPT] = handle_external_interrupt, | |
988ad74f | 7455 | [EXIT_REASON_TRIPLE_FAULT] = handle_triple_fault, |
f08864b4 | 7456 | [EXIT_REASON_NMI_WINDOW] = handle_nmi_window, |
6aa8b732 | 7457 | [EXIT_REASON_IO_INSTRUCTION] = handle_io, |
6aa8b732 AK |
7458 | [EXIT_REASON_CR_ACCESS] = handle_cr, |
7459 | [EXIT_REASON_DR_ACCESS] = handle_dr, | |
7460 | [EXIT_REASON_CPUID] = handle_cpuid, | |
7461 | [EXIT_REASON_MSR_READ] = handle_rdmsr, | |
7462 | [EXIT_REASON_MSR_WRITE] = handle_wrmsr, | |
7463 | [EXIT_REASON_PENDING_INTERRUPT] = handle_interrupt_window, | |
7464 | [EXIT_REASON_HLT] = handle_halt, | |
ec25d5e6 | 7465 | [EXIT_REASON_INVD] = handle_invd, |
a7052897 | 7466 | [EXIT_REASON_INVLPG] = handle_invlpg, |
fee84b07 | 7467 | [EXIT_REASON_RDPMC] = handle_rdpmc, |
c21415e8 | 7468 | [EXIT_REASON_VMCALL] = handle_vmcall, |
27d6c865 | 7469 | [EXIT_REASON_VMCLEAR] = handle_vmclear, |
cd232ad0 | 7470 | [EXIT_REASON_VMLAUNCH] = handle_vmlaunch, |
63846663 | 7471 | [EXIT_REASON_VMPTRLD] = handle_vmptrld, |
6a4d7550 | 7472 | [EXIT_REASON_VMPTRST] = handle_vmptrst, |
49f705c5 | 7473 | [EXIT_REASON_VMREAD] = handle_vmread, |
cd232ad0 | 7474 | [EXIT_REASON_VMRESUME] = handle_vmresume, |
49f705c5 | 7475 | [EXIT_REASON_VMWRITE] = handle_vmwrite, |
ec378aee NHE |
7476 | [EXIT_REASON_VMOFF] = handle_vmoff, |
7477 | [EXIT_REASON_VMON] = handle_vmon, | |
f78e0e2e SY |
7478 | [EXIT_REASON_TPR_BELOW_THRESHOLD] = handle_tpr_below_threshold, |
7479 | [EXIT_REASON_APIC_ACCESS] = handle_apic_access, | |
83d4c286 | 7480 | [EXIT_REASON_APIC_WRITE] = handle_apic_write, |
c7c9c56c | 7481 | [EXIT_REASON_EOI_INDUCED] = handle_apic_eoi_induced, |
e5edaa01 | 7482 | [EXIT_REASON_WBINVD] = handle_wbinvd, |
2acf923e | 7483 | [EXIT_REASON_XSETBV] = handle_xsetbv, |
37817f29 | 7484 | [EXIT_REASON_TASK_SWITCH] = handle_task_switch, |
a0861c02 | 7485 | [EXIT_REASON_MCE_DURING_VMENTRY] = handle_machine_check, |
68f89400 MT |
7486 | [EXIT_REASON_EPT_VIOLATION] = handle_ept_violation, |
7487 | [EXIT_REASON_EPT_MISCONFIG] = handle_ept_misconfig, | |
4b8d54f9 | 7488 | [EXIT_REASON_PAUSE_INSTRUCTION] = handle_pause, |
87c00572 | 7489 | [EXIT_REASON_MWAIT_INSTRUCTION] = handle_mwait, |
5f3d45e7 | 7490 | [EXIT_REASON_MONITOR_TRAP_FLAG] = handle_monitor_trap, |
87c00572 | 7491 | [EXIT_REASON_MONITOR_INSTRUCTION] = handle_monitor, |
bfd0a56b | 7492 | [EXIT_REASON_INVEPT] = handle_invept, |
a642fc30 | 7493 | [EXIT_REASON_INVVPID] = handle_invvpid, |
f53cd63c WL |
7494 | [EXIT_REASON_XSAVES] = handle_xsaves, |
7495 | [EXIT_REASON_XRSTORS] = handle_xrstors, | |
843e4330 | 7496 | [EXIT_REASON_PML_FULL] = handle_pml_full, |
8b3e34e4 | 7497 | [EXIT_REASON_PCOMMIT] = handle_pcommit, |
6aa8b732 AK |
7498 | }; |
7499 | ||
7500 | static const int kvm_vmx_max_exit_handlers = | |
50a3485c | 7501 | ARRAY_SIZE(kvm_vmx_exit_handlers); |
6aa8b732 | 7502 | |
908a7bdd JK |
7503 | static bool nested_vmx_exit_handled_io(struct kvm_vcpu *vcpu, |
7504 | struct vmcs12 *vmcs12) | |
7505 | { | |
7506 | unsigned long exit_qualification; | |
7507 | gpa_t bitmap, last_bitmap; | |
7508 | unsigned int port; | |
7509 | int size; | |
7510 | u8 b; | |
7511 | ||
908a7bdd | 7512 | if (!nested_cpu_has(vmcs12, CPU_BASED_USE_IO_BITMAPS)) |
2f0a6397 | 7513 | return nested_cpu_has(vmcs12, CPU_BASED_UNCOND_IO_EXITING); |
908a7bdd JK |
7514 | |
7515 | exit_qualification = vmcs_readl(EXIT_QUALIFICATION); | |
7516 | ||
7517 | port = exit_qualification >> 16; | |
7518 | size = (exit_qualification & 7) + 1; | |
7519 | ||
7520 | last_bitmap = (gpa_t)-1; | |
7521 | b = -1; | |
7522 | ||
7523 | while (size > 0) { | |
7524 | if (port < 0x8000) | |
7525 | bitmap = vmcs12->io_bitmap_a; | |
7526 | else if (port < 0x10000) | |
7527 | bitmap = vmcs12->io_bitmap_b; | |
7528 | else | |
1d804d07 | 7529 | return true; |
908a7bdd JK |
7530 | bitmap += (port & 0x7fff) / 8; |
7531 | ||
7532 | if (last_bitmap != bitmap) | |
54bf36aa | 7533 | if (kvm_vcpu_read_guest(vcpu, bitmap, &b, 1)) |
1d804d07 | 7534 | return true; |
908a7bdd | 7535 | if (b & (1 << (port & 7))) |
1d804d07 | 7536 | return true; |
908a7bdd JK |
7537 | |
7538 | port++; | |
7539 | size--; | |
7540 | last_bitmap = bitmap; | |
7541 | } | |
7542 | ||
1d804d07 | 7543 | return false; |
908a7bdd JK |
7544 | } |
7545 | ||
644d711a NHE |
7546 | /* |
7547 | * Return 1 if we should exit from L2 to L1 to handle an MSR access access, | |
7548 | * rather than handle it ourselves in L0. I.e., check whether L1 expressed | |
7549 | * disinterest in the current event (read or write a specific MSR) by using an | |
7550 | * MSR bitmap. This may be the case even when L0 doesn't use MSR bitmaps. | |
7551 | */ | |
7552 | static bool nested_vmx_exit_handled_msr(struct kvm_vcpu *vcpu, | |
7553 | struct vmcs12 *vmcs12, u32 exit_reason) | |
7554 | { | |
7555 | u32 msr_index = vcpu->arch.regs[VCPU_REGS_RCX]; | |
7556 | gpa_t bitmap; | |
7557 | ||
cbd29cb6 | 7558 | if (!nested_cpu_has(vmcs12, CPU_BASED_USE_MSR_BITMAPS)) |
1d804d07 | 7559 | return true; |
644d711a NHE |
7560 | |
7561 | /* | |
7562 | * The MSR_BITMAP page is divided into four 1024-byte bitmaps, | |
7563 | * for the four combinations of read/write and low/high MSR numbers. | |
7564 | * First we need to figure out which of the four to use: | |
7565 | */ | |
7566 | bitmap = vmcs12->msr_bitmap; | |
7567 | if (exit_reason == EXIT_REASON_MSR_WRITE) | |
7568 | bitmap += 2048; | |
7569 | if (msr_index >= 0xc0000000) { | |
7570 | msr_index -= 0xc0000000; | |
7571 | bitmap += 1024; | |
7572 | } | |
7573 | ||
7574 | /* Then read the msr_index'th bit from this bitmap: */ | |
7575 | if (msr_index < 1024*8) { | |
7576 | unsigned char b; | |
54bf36aa | 7577 | if (kvm_vcpu_read_guest(vcpu, bitmap + msr_index/8, &b, 1)) |
1d804d07 | 7578 | return true; |
644d711a NHE |
7579 | return 1 & (b >> (msr_index & 7)); |
7580 | } else | |
1d804d07 | 7581 | return true; /* let L1 handle the wrong parameter */ |
644d711a NHE |
7582 | } |
7583 | ||
7584 | /* | |
7585 | * Return 1 if we should exit from L2 to L1 to handle a CR access exit, | |
7586 | * rather than handle it ourselves in L0. I.e., check if L1 wanted to | |
7587 | * intercept (via guest_host_mask etc.) the current event. | |
7588 | */ | |
7589 | static bool nested_vmx_exit_handled_cr(struct kvm_vcpu *vcpu, | |
7590 | struct vmcs12 *vmcs12) | |
7591 | { | |
7592 | unsigned long exit_qualification = vmcs_readl(EXIT_QUALIFICATION); | |
7593 | int cr = exit_qualification & 15; | |
7594 | int reg = (exit_qualification >> 8) & 15; | |
1e32c079 | 7595 | unsigned long val = kvm_register_readl(vcpu, reg); |
644d711a NHE |
7596 | |
7597 | switch ((exit_qualification >> 4) & 3) { | |
7598 | case 0: /* mov to cr */ | |
7599 | switch (cr) { | |
7600 | case 0: | |
7601 | if (vmcs12->cr0_guest_host_mask & | |
7602 | (val ^ vmcs12->cr0_read_shadow)) | |
1d804d07 | 7603 | return true; |
644d711a NHE |
7604 | break; |
7605 | case 3: | |
7606 | if ((vmcs12->cr3_target_count >= 1 && | |
7607 | vmcs12->cr3_target_value0 == val) || | |
7608 | (vmcs12->cr3_target_count >= 2 && | |
7609 | vmcs12->cr3_target_value1 == val) || | |
7610 | (vmcs12->cr3_target_count >= 3 && | |
7611 | vmcs12->cr3_target_value2 == val) || | |
7612 | (vmcs12->cr3_target_count >= 4 && | |
7613 | vmcs12->cr3_target_value3 == val)) | |
1d804d07 | 7614 | return false; |
644d711a | 7615 | if (nested_cpu_has(vmcs12, CPU_BASED_CR3_LOAD_EXITING)) |
1d804d07 | 7616 | return true; |
644d711a NHE |
7617 | break; |
7618 | case 4: | |
7619 | if (vmcs12->cr4_guest_host_mask & | |
7620 | (vmcs12->cr4_read_shadow ^ val)) | |
1d804d07 | 7621 | return true; |
644d711a NHE |
7622 | break; |
7623 | case 8: | |
7624 | if (nested_cpu_has(vmcs12, CPU_BASED_CR8_LOAD_EXITING)) | |
1d804d07 | 7625 | return true; |
644d711a NHE |
7626 | break; |
7627 | } | |
7628 | break; | |
7629 | case 2: /* clts */ | |
7630 | if ((vmcs12->cr0_guest_host_mask & X86_CR0_TS) && | |
7631 | (vmcs12->cr0_read_shadow & X86_CR0_TS)) | |
1d804d07 | 7632 | return true; |
644d711a NHE |
7633 | break; |
7634 | case 1: /* mov from cr */ | |
7635 | switch (cr) { | |
7636 | case 3: | |
7637 | if (vmcs12->cpu_based_vm_exec_control & | |
7638 | CPU_BASED_CR3_STORE_EXITING) | |
1d804d07 | 7639 | return true; |
644d711a NHE |
7640 | break; |
7641 | case 8: | |
7642 | if (vmcs12->cpu_based_vm_exec_control & | |
7643 | CPU_BASED_CR8_STORE_EXITING) | |
1d804d07 | 7644 | return true; |
644d711a NHE |
7645 | break; |
7646 | } | |
7647 | break; | |
7648 | case 3: /* lmsw */ | |
7649 | /* | |
7650 | * lmsw can change bits 1..3 of cr0, and only set bit 0 of | |
7651 | * cr0. Other attempted changes are ignored, with no exit. | |
7652 | */ | |
7653 | if (vmcs12->cr0_guest_host_mask & 0xe & | |
7654 | (val ^ vmcs12->cr0_read_shadow)) | |
1d804d07 | 7655 | return true; |
644d711a NHE |
7656 | if ((vmcs12->cr0_guest_host_mask & 0x1) && |
7657 | !(vmcs12->cr0_read_shadow & 0x1) && | |
7658 | (val & 0x1)) | |
1d804d07 | 7659 | return true; |
644d711a NHE |
7660 | break; |
7661 | } | |
1d804d07 | 7662 | return false; |
644d711a NHE |
7663 | } |
7664 | ||
7665 | /* | |
7666 | * Return 1 if we should exit from L2 to L1 to handle an exit, or 0 if we | |
7667 | * should handle it ourselves in L0 (and then continue L2). Only call this | |
7668 | * when in is_guest_mode (L2). | |
7669 | */ | |
7670 | static bool nested_vmx_exit_handled(struct kvm_vcpu *vcpu) | |
7671 | { | |
644d711a NHE |
7672 | u32 intr_info = vmcs_read32(VM_EXIT_INTR_INFO); |
7673 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
7674 | struct vmcs12 *vmcs12 = get_vmcs12(vcpu); | |
957c897e | 7675 | u32 exit_reason = vmx->exit_reason; |
644d711a | 7676 | |
542060ea JK |
7677 | trace_kvm_nested_vmexit(kvm_rip_read(vcpu), exit_reason, |
7678 | vmcs_readl(EXIT_QUALIFICATION), | |
7679 | vmx->idt_vectoring_info, | |
7680 | intr_info, | |
7681 | vmcs_read32(VM_EXIT_INTR_ERROR_CODE), | |
7682 | KVM_ISA_VMX); | |
7683 | ||
644d711a | 7684 | if (vmx->nested.nested_run_pending) |
1d804d07 | 7685 | return false; |
644d711a NHE |
7686 | |
7687 | if (unlikely(vmx->fail)) { | |
bd80158a JK |
7688 | pr_info_ratelimited("%s failed vm entry %x\n", __func__, |
7689 | vmcs_read32(VM_INSTRUCTION_ERROR)); | |
1d804d07 | 7690 | return true; |
644d711a NHE |
7691 | } |
7692 | ||
7693 | switch (exit_reason) { | |
7694 | case EXIT_REASON_EXCEPTION_NMI: | |
7695 | if (!is_exception(intr_info)) | |
1d804d07 | 7696 | return false; |
644d711a NHE |
7697 | else if (is_page_fault(intr_info)) |
7698 | return enable_ept; | |
e504c909 | 7699 | else if (is_no_device(intr_info) && |
ccf9844e | 7700 | !(vmcs12->guest_cr0 & X86_CR0_TS)) |
1d804d07 | 7701 | return false; |
644d711a NHE |
7702 | return vmcs12->exception_bitmap & |
7703 | (1u << (intr_info & INTR_INFO_VECTOR_MASK)); | |
7704 | case EXIT_REASON_EXTERNAL_INTERRUPT: | |
1d804d07 | 7705 | return false; |
644d711a | 7706 | case EXIT_REASON_TRIPLE_FAULT: |
1d804d07 | 7707 | return true; |
644d711a | 7708 | case EXIT_REASON_PENDING_INTERRUPT: |
3b656cf7 | 7709 | return nested_cpu_has(vmcs12, CPU_BASED_VIRTUAL_INTR_PENDING); |
644d711a | 7710 | case EXIT_REASON_NMI_WINDOW: |
3b656cf7 | 7711 | return nested_cpu_has(vmcs12, CPU_BASED_VIRTUAL_NMI_PENDING); |
644d711a | 7712 | case EXIT_REASON_TASK_SWITCH: |
1d804d07 | 7713 | return true; |
644d711a | 7714 | case EXIT_REASON_CPUID: |
bc613494 | 7715 | if (kvm_register_read(vcpu, VCPU_REGS_RAX) == 0xa) |
1d804d07 JP |
7716 | return false; |
7717 | return true; | |
644d711a NHE |
7718 | case EXIT_REASON_HLT: |
7719 | return nested_cpu_has(vmcs12, CPU_BASED_HLT_EXITING); | |
7720 | case EXIT_REASON_INVD: | |
1d804d07 | 7721 | return true; |
644d711a NHE |
7722 | case EXIT_REASON_INVLPG: |
7723 | return nested_cpu_has(vmcs12, CPU_BASED_INVLPG_EXITING); | |
7724 | case EXIT_REASON_RDPMC: | |
7725 | return nested_cpu_has(vmcs12, CPU_BASED_RDPMC_EXITING); | |
b3a2a907 | 7726 | case EXIT_REASON_RDTSC: case EXIT_REASON_RDTSCP: |
644d711a NHE |
7727 | return nested_cpu_has(vmcs12, CPU_BASED_RDTSC_EXITING); |
7728 | case EXIT_REASON_VMCALL: case EXIT_REASON_VMCLEAR: | |
7729 | case EXIT_REASON_VMLAUNCH: case EXIT_REASON_VMPTRLD: | |
7730 | case EXIT_REASON_VMPTRST: case EXIT_REASON_VMREAD: | |
7731 | case EXIT_REASON_VMRESUME: case EXIT_REASON_VMWRITE: | |
7732 | case EXIT_REASON_VMOFF: case EXIT_REASON_VMON: | |
a642fc30 | 7733 | case EXIT_REASON_INVEPT: case EXIT_REASON_INVVPID: |
644d711a NHE |
7734 | /* |
7735 | * VMX instructions trap unconditionally. This allows L1 to | |
7736 | * emulate them for its L2 guest, i.e., allows 3-level nesting! | |
7737 | */ | |
1d804d07 | 7738 | return true; |
644d711a NHE |
7739 | case EXIT_REASON_CR_ACCESS: |
7740 | return nested_vmx_exit_handled_cr(vcpu, vmcs12); | |
7741 | case EXIT_REASON_DR_ACCESS: | |
7742 | return nested_cpu_has(vmcs12, CPU_BASED_MOV_DR_EXITING); | |
7743 | case EXIT_REASON_IO_INSTRUCTION: | |
908a7bdd | 7744 | return nested_vmx_exit_handled_io(vcpu, vmcs12); |
644d711a NHE |
7745 | case EXIT_REASON_MSR_READ: |
7746 | case EXIT_REASON_MSR_WRITE: | |
7747 | return nested_vmx_exit_handled_msr(vcpu, vmcs12, exit_reason); | |
7748 | case EXIT_REASON_INVALID_STATE: | |
1d804d07 | 7749 | return true; |
644d711a NHE |
7750 | case EXIT_REASON_MWAIT_INSTRUCTION: |
7751 | return nested_cpu_has(vmcs12, CPU_BASED_MWAIT_EXITING); | |
5f3d45e7 MD |
7752 | case EXIT_REASON_MONITOR_TRAP_FLAG: |
7753 | return nested_cpu_has(vmcs12, CPU_BASED_MONITOR_TRAP_FLAG); | |
644d711a NHE |
7754 | case EXIT_REASON_MONITOR_INSTRUCTION: |
7755 | return nested_cpu_has(vmcs12, CPU_BASED_MONITOR_EXITING); | |
7756 | case EXIT_REASON_PAUSE_INSTRUCTION: | |
7757 | return nested_cpu_has(vmcs12, CPU_BASED_PAUSE_EXITING) || | |
7758 | nested_cpu_has2(vmcs12, | |
7759 | SECONDARY_EXEC_PAUSE_LOOP_EXITING); | |
7760 | case EXIT_REASON_MCE_DURING_VMENTRY: | |
1d804d07 | 7761 | return false; |
644d711a | 7762 | case EXIT_REASON_TPR_BELOW_THRESHOLD: |
a7c0b07d | 7763 | return nested_cpu_has(vmcs12, CPU_BASED_TPR_SHADOW); |
644d711a NHE |
7764 | case EXIT_REASON_APIC_ACCESS: |
7765 | return nested_cpu_has2(vmcs12, | |
7766 | SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES); | |
82f0dd4b | 7767 | case EXIT_REASON_APIC_WRITE: |
608406e2 WV |
7768 | case EXIT_REASON_EOI_INDUCED: |
7769 | /* apic_write and eoi_induced should exit unconditionally. */ | |
1d804d07 | 7770 | return true; |
644d711a | 7771 | case EXIT_REASON_EPT_VIOLATION: |
2b1be677 NHE |
7772 | /* |
7773 | * L0 always deals with the EPT violation. If nested EPT is | |
7774 | * used, and the nested mmu code discovers that the address is | |
7775 | * missing in the guest EPT table (EPT12), the EPT violation | |
7776 | * will be injected with nested_ept_inject_page_fault() | |
7777 | */ | |
1d804d07 | 7778 | return false; |
644d711a | 7779 | case EXIT_REASON_EPT_MISCONFIG: |
2b1be677 NHE |
7780 | /* |
7781 | * L2 never uses directly L1's EPT, but rather L0's own EPT | |
7782 | * table (shadow on EPT) or a merged EPT table that L0 built | |
7783 | * (EPT on EPT). So any problems with the structure of the | |
7784 | * table is L0's fault. | |
7785 | */ | |
1d804d07 | 7786 | return false; |
644d711a NHE |
7787 | case EXIT_REASON_WBINVD: |
7788 | return nested_cpu_has2(vmcs12, SECONDARY_EXEC_WBINVD_EXITING); | |
7789 | case EXIT_REASON_XSETBV: | |
1d804d07 | 7790 | return true; |
81dc01f7 WL |
7791 | case EXIT_REASON_XSAVES: case EXIT_REASON_XRSTORS: |
7792 | /* | |
7793 | * This should never happen, since it is not possible to | |
7794 | * set XSS to a non-zero value---neither in L1 nor in L2. | |
7795 | * If if it were, XSS would have to be checked against | |
7796 | * the XSS exit bitmap in vmcs12. | |
7797 | */ | |
7798 | return nested_cpu_has2(vmcs12, SECONDARY_EXEC_XSAVES); | |
8b3e34e4 XG |
7799 | case EXIT_REASON_PCOMMIT: |
7800 | return nested_cpu_has2(vmcs12, SECONDARY_EXEC_PCOMMIT); | |
644d711a | 7801 | default: |
1d804d07 | 7802 | return true; |
644d711a NHE |
7803 | } |
7804 | } | |
7805 | ||
586f9607 AK |
7806 | static void vmx_get_exit_info(struct kvm_vcpu *vcpu, u64 *info1, u64 *info2) |
7807 | { | |
7808 | *info1 = vmcs_readl(EXIT_QUALIFICATION); | |
7809 | *info2 = vmcs_read32(VM_EXIT_INTR_INFO); | |
7810 | } | |
7811 | ||
a3eaa864 | 7812 | static int vmx_create_pml_buffer(struct vcpu_vmx *vmx) |
843e4330 KH |
7813 | { |
7814 | struct page *pml_pg; | |
843e4330 KH |
7815 | |
7816 | pml_pg = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
7817 | if (!pml_pg) | |
7818 | return -ENOMEM; | |
7819 | ||
7820 | vmx->pml_pg = pml_pg; | |
7821 | ||
7822 | vmcs_write64(PML_ADDRESS, page_to_phys(vmx->pml_pg)); | |
7823 | vmcs_write16(GUEST_PML_INDEX, PML_ENTITY_NUM - 1); | |
7824 | ||
843e4330 KH |
7825 | return 0; |
7826 | } | |
7827 | ||
a3eaa864 | 7828 | static void vmx_destroy_pml_buffer(struct vcpu_vmx *vmx) |
843e4330 | 7829 | { |
a3eaa864 KH |
7830 | if (vmx->pml_pg) { |
7831 | __free_page(vmx->pml_pg); | |
7832 | vmx->pml_pg = NULL; | |
7833 | } | |
843e4330 KH |
7834 | } |
7835 | ||
54bf36aa | 7836 | static void vmx_flush_pml_buffer(struct kvm_vcpu *vcpu) |
843e4330 | 7837 | { |
54bf36aa | 7838 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
843e4330 KH |
7839 | u64 *pml_buf; |
7840 | u16 pml_idx; | |
7841 | ||
7842 | pml_idx = vmcs_read16(GUEST_PML_INDEX); | |
7843 | ||
7844 | /* Do nothing if PML buffer is empty */ | |
7845 | if (pml_idx == (PML_ENTITY_NUM - 1)) | |
7846 | return; | |
7847 | ||
7848 | /* PML index always points to next available PML buffer entity */ | |
7849 | if (pml_idx >= PML_ENTITY_NUM) | |
7850 | pml_idx = 0; | |
7851 | else | |
7852 | pml_idx++; | |
7853 | ||
7854 | pml_buf = page_address(vmx->pml_pg); | |
7855 | for (; pml_idx < PML_ENTITY_NUM; pml_idx++) { | |
7856 | u64 gpa; | |
7857 | ||
7858 | gpa = pml_buf[pml_idx]; | |
7859 | WARN_ON(gpa & (PAGE_SIZE - 1)); | |
54bf36aa | 7860 | kvm_vcpu_mark_page_dirty(vcpu, gpa >> PAGE_SHIFT); |
843e4330 KH |
7861 | } |
7862 | ||
7863 | /* reset PML index */ | |
7864 | vmcs_write16(GUEST_PML_INDEX, PML_ENTITY_NUM - 1); | |
7865 | } | |
7866 | ||
7867 | /* | |
7868 | * Flush all vcpus' PML buffer and update logged GPAs to dirty_bitmap. | |
7869 | * Called before reporting dirty_bitmap to userspace. | |
7870 | */ | |
7871 | static void kvm_flush_pml_buffers(struct kvm *kvm) | |
7872 | { | |
7873 | int i; | |
7874 | struct kvm_vcpu *vcpu; | |
7875 | /* | |
7876 | * We only need to kick vcpu out of guest mode here, as PML buffer | |
7877 | * is flushed at beginning of all VMEXITs, and it's obvious that only | |
7878 | * vcpus running in guest are possible to have unflushed GPAs in PML | |
7879 | * buffer. | |
7880 | */ | |
7881 | kvm_for_each_vcpu(i, vcpu, kvm) | |
7882 | kvm_vcpu_kick(vcpu); | |
7883 | } | |
7884 | ||
4eb64dce PB |
7885 | static void vmx_dump_sel(char *name, uint32_t sel) |
7886 | { | |
7887 | pr_err("%s sel=0x%04x, attr=0x%05x, limit=0x%08x, base=0x%016lx\n", | |
7888 | name, vmcs_read32(sel), | |
7889 | vmcs_read32(sel + GUEST_ES_AR_BYTES - GUEST_ES_SELECTOR), | |
7890 | vmcs_read32(sel + GUEST_ES_LIMIT - GUEST_ES_SELECTOR), | |
7891 | vmcs_readl(sel + GUEST_ES_BASE - GUEST_ES_SELECTOR)); | |
7892 | } | |
7893 | ||
7894 | static void vmx_dump_dtsel(char *name, uint32_t limit) | |
7895 | { | |
7896 | pr_err("%s limit=0x%08x, base=0x%016lx\n", | |
7897 | name, vmcs_read32(limit), | |
7898 | vmcs_readl(limit + GUEST_GDTR_BASE - GUEST_GDTR_LIMIT)); | |
7899 | } | |
7900 | ||
7901 | static void dump_vmcs(void) | |
7902 | { | |
7903 | u32 vmentry_ctl = vmcs_read32(VM_ENTRY_CONTROLS); | |
7904 | u32 vmexit_ctl = vmcs_read32(VM_EXIT_CONTROLS); | |
7905 | u32 cpu_based_exec_ctrl = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL); | |
7906 | u32 pin_based_exec_ctrl = vmcs_read32(PIN_BASED_VM_EXEC_CONTROL); | |
7907 | u32 secondary_exec_control = 0; | |
7908 | unsigned long cr4 = vmcs_readl(GUEST_CR4); | |
7909 | u64 efer = vmcs_readl(GUEST_IA32_EFER); | |
7910 | int i, n; | |
7911 | ||
7912 | if (cpu_has_secondary_exec_ctrls()) | |
7913 | secondary_exec_control = vmcs_read32(SECONDARY_VM_EXEC_CONTROL); | |
7914 | ||
7915 | pr_err("*** Guest State ***\n"); | |
7916 | pr_err("CR0: actual=0x%016lx, shadow=0x%016lx, gh_mask=%016lx\n", | |
7917 | vmcs_readl(GUEST_CR0), vmcs_readl(CR0_READ_SHADOW), | |
7918 | vmcs_readl(CR0_GUEST_HOST_MASK)); | |
7919 | pr_err("CR4: actual=0x%016lx, shadow=0x%016lx, gh_mask=%016lx\n", | |
7920 | cr4, vmcs_readl(CR4_READ_SHADOW), vmcs_readl(CR4_GUEST_HOST_MASK)); | |
7921 | pr_err("CR3 = 0x%016lx\n", vmcs_readl(GUEST_CR3)); | |
7922 | if ((secondary_exec_control & SECONDARY_EXEC_ENABLE_EPT) && | |
7923 | (cr4 & X86_CR4_PAE) && !(efer & EFER_LMA)) | |
7924 | { | |
7925 | pr_err("PDPTR0 = 0x%016lx PDPTR1 = 0x%016lx\n", | |
7926 | vmcs_readl(GUEST_PDPTR0), vmcs_readl(GUEST_PDPTR1)); | |
7927 | pr_err("PDPTR2 = 0x%016lx PDPTR3 = 0x%016lx\n", | |
7928 | vmcs_readl(GUEST_PDPTR2), vmcs_readl(GUEST_PDPTR3)); | |
7929 | } | |
7930 | pr_err("RSP = 0x%016lx RIP = 0x%016lx\n", | |
7931 | vmcs_readl(GUEST_RSP), vmcs_readl(GUEST_RIP)); | |
7932 | pr_err("RFLAGS=0x%08lx DR7 = 0x%016lx\n", | |
7933 | vmcs_readl(GUEST_RFLAGS), vmcs_readl(GUEST_DR7)); | |
7934 | pr_err("Sysenter RSP=%016lx CS:RIP=%04x:%016lx\n", | |
7935 | vmcs_readl(GUEST_SYSENTER_ESP), | |
7936 | vmcs_read32(GUEST_SYSENTER_CS), vmcs_readl(GUEST_SYSENTER_EIP)); | |
7937 | vmx_dump_sel("CS: ", GUEST_CS_SELECTOR); | |
7938 | vmx_dump_sel("DS: ", GUEST_DS_SELECTOR); | |
7939 | vmx_dump_sel("SS: ", GUEST_SS_SELECTOR); | |
7940 | vmx_dump_sel("ES: ", GUEST_ES_SELECTOR); | |
7941 | vmx_dump_sel("FS: ", GUEST_FS_SELECTOR); | |
7942 | vmx_dump_sel("GS: ", GUEST_GS_SELECTOR); | |
7943 | vmx_dump_dtsel("GDTR:", GUEST_GDTR_LIMIT); | |
7944 | vmx_dump_sel("LDTR:", GUEST_LDTR_SELECTOR); | |
7945 | vmx_dump_dtsel("IDTR:", GUEST_IDTR_LIMIT); | |
7946 | vmx_dump_sel("TR: ", GUEST_TR_SELECTOR); | |
7947 | if ((vmexit_ctl & (VM_EXIT_SAVE_IA32_PAT | VM_EXIT_SAVE_IA32_EFER)) || | |
7948 | (vmentry_ctl & (VM_ENTRY_LOAD_IA32_PAT | VM_ENTRY_LOAD_IA32_EFER))) | |
7949 | pr_err("EFER = 0x%016llx PAT = 0x%016lx\n", | |
7950 | efer, vmcs_readl(GUEST_IA32_PAT)); | |
7951 | pr_err("DebugCtl = 0x%016lx DebugExceptions = 0x%016lx\n", | |
7952 | vmcs_readl(GUEST_IA32_DEBUGCTL), | |
7953 | vmcs_readl(GUEST_PENDING_DBG_EXCEPTIONS)); | |
7954 | if (vmentry_ctl & VM_ENTRY_LOAD_IA32_PERF_GLOBAL_CTRL) | |
7955 | pr_err("PerfGlobCtl = 0x%016lx\n", | |
7956 | vmcs_readl(GUEST_IA32_PERF_GLOBAL_CTRL)); | |
7957 | if (vmentry_ctl & VM_ENTRY_LOAD_BNDCFGS) | |
7958 | pr_err("BndCfgS = 0x%016lx\n", vmcs_readl(GUEST_BNDCFGS)); | |
7959 | pr_err("Interruptibility = %08x ActivityState = %08x\n", | |
7960 | vmcs_read32(GUEST_INTERRUPTIBILITY_INFO), | |
7961 | vmcs_read32(GUEST_ACTIVITY_STATE)); | |
7962 | if (secondary_exec_control & SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY) | |
7963 | pr_err("InterruptStatus = %04x\n", | |
7964 | vmcs_read16(GUEST_INTR_STATUS)); | |
7965 | ||
7966 | pr_err("*** Host State ***\n"); | |
7967 | pr_err("RIP = 0x%016lx RSP = 0x%016lx\n", | |
7968 | vmcs_readl(HOST_RIP), vmcs_readl(HOST_RSP)); | |
7969 | pr_err("CS=%04x SS=%04x DS=%04x ES=%04x FS=%04x GS=%04x TR=%04x\n", | |
7970 | vmcs_read16(HOST_CS_SELECTOR), vmcs_read16(HOST_SS_SELECTOR), | |
7971 | vmcs_read16(HOST_DS_SELECTOR), vmcs_read16(HOST_ES_SELECTOR), | |
7972 | vmcs_read16(HOST_FS_SELECTOR), vmcs_read16(HOST_GS_SELECTOR), | |
7973 | vmcs_read16(HOST_TR_SELECTOR)); | |
7974 | pr_err("FSBase=%016lx GSBase=%016lx TRBase=%016lx\n", | |
7975 | vmcs_readl(HOST_FS_BASE), vmcs_readl(HOST_GS_BASE), | |
7976 | vmcs_readl(HOST_TR_BASE)); | |
7977 | pr_err("GDTBase=%016lx IDTBase=%016lx\n", | |
7978 | vmcs_readl(HOST_GDTR_BASE), vmcs_readl(HOST_IDTR_BASE)); | |
7979 | pr_err("CR0=%016lx CR3=%016lx CR4=%016lx\n", | |
7980 | vmcs_readl(HOST_CR0), vmcs_readl(HOST_CR3), | |
7981 | vmcs_readl(HOST_CR4)); | |
7982 | pr_err("Sysenter RSP=%016lx CS:RIP=%04x:%016lx\n", | |
7983 | vmcs_readl(HOST_IA32_SYSENTER_ESP), | |
7984 | vmcs_read32(HOST_IA32_SYSENTER_CS), | |
7985 | vmcs_readl(HOST_IA32_SYSENTER_EIP)); | |
7986 | if (vmexit_ctl & (VM_EXIT_LOAD_IA32_PAT | VM_EXIT_LOAD_IA32_EFER)) | |
7987 | pr_err("EFER = 0x%016lx PAT = 0x%016lx\n", | |
7988 | vmcs_readl(HOST_IA32_EFER), vmcs_readl(HOST_IA32_PAT)); | |
7989 | if (vmexit_ctl & VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL) | |
7990 | pr_err("PerfGlobCtl = 0x%016lx\n", | |
7991 | vmcs_readl(HOST_IA32_PERF_GLOBAL_CTRL)); | |
7992 | ||
7993 | pr_err("*** Control State ***\n"); | |
7994 | pr_err("PinBased=%08x CPUBased=%08x SecondaryExec=%08x\n", | |
7995 | pin_based_exec_ctrl, cpu_based_exec_ctrl, secondary_exec_control); | |
7996 | pr_err("EntryControls=%08x ExitControls=%08x\n", vmentry_ctl, vmexit_ctl); | |
7997 | pr_err("ExceptionBitmap=%08x PFECmask=%08x PFECmatch=%08x\n", | |
7998 | vmcs_read32(EXCEPTION_BITMAP), | |
7999 | vmcs_read32(PAGE_FAULT_ERROR_CODE_MASK), | |
8000 | vmcs_read32(PAGE_FAULT_ERROR_CODE_MATCH)); | |
8001 | pr_err("VMEntry: intr_info=%08x errcode=%08x ilen=%08x\n", | |
8002 | vmcs_read32(VM_ENTRY_INTR_INFO_FIELD), | |
8003 | vmcs_read32(VM_ENTRY_EXCEPTION_ERROR_CODE), | |
8004 | vmcs_read32(VM_ENTRY_INSTRUCTION_LEN)); | |
8005 | pr_err("VMExit: intr_info=%08x errcode=%08x ilen=%08x\n", | |
8006 | vmcs_read32(VM_EXIT_INTR_INFO), | |
8007 | vmcs_read32(VM_EXIT_INTR_ERROR_CODE), | |
8008 | vmcs_read32(VM_EXIT_INSTRUCTION_LEN)); | |
8009 | pr_err(" reason=%08x qualification=%016lx\n", | |
8010 | vmcs_read32(VM_EXIT_REASON), vmcs_readl(EXIT_QUALIFICATION)); | |
8011 | pr_err("IDTVectoring: info=%08x errcode=%08x\n", | |
8012 | vmcs_read32(IDT_VECTORING_INFO_FIELD), | |
8013 | vmcs_read32(IDT_VECTORING_ERROR_CODE)); | |
8014 | pr_err("TSC Offset = 0x%016lx\n", vmcs_readl(TSC_OFFSET)); | |
8cfe9866 HZ |
8015 | if (secondary_exec_control & SECONDARY_EXEC_TSC_SCALING) |
8016 | pr_err("TSC Multiplier = 0x%016lx\n", | |
8017 | vmcs_readl(TSC_MULTIPLIER)); | |
4eb64dce PB |
8018 | if (cpu_based_exec_ctrl & CPU_BASED_TPR_SHADOW) |
8019 | pr_err("TPR Threshold = 0x%02x\n", vmcs_read32(TPR_THRESHOLD)); | |
8020 | if (pin_based_exec_ctrl & PIN_BASED_POSTED_INTR) | |
8021 | pr_err("PostedIntrVec = 0x%02x\n", vmcs_read16(POSTED_INTR_NV)); | |
8022 | if ((secondary_exec_control & SECONDARY_EXEC_ENABLE_EPT)) | |
8023 | pr_err("EPT pointer = 0x%016lx\n", vmcs_readl(EPT_POINTER)); | |
8024 | n = vmcs_read32(CR3_TARGET_COUNT); | |
8025 | for (i = 0; i + 1 < n; i += 4) | |
8026 | pr_err("CR3 target%u=%016lx target%u=%016lx\n", | |
8027 | i, vmcs_readl(CR3_TARGET_VALUE0 + i * 2), | |
8028 | i + 1, vmcs_readl(CR3_TARGET_VALUE0 + i * 2 + 2)); | |
8029 | if (i < n) | |
8030 | pr_err("CR3 target%u=%016lx\n", | |
8031 | i, vmcs_readl(CR3_TARGET_VALUE0 + i * 2)); | |
8032 | if (secondary_exec_control & SECONDARY_EXEC_PAUSE_LOOP_EXITING) | |
8033 | pr_err("PLE Gap=%08x Window=%08x\n", | |
8034 | vmcs_read32(PLE_GAP), vmcs_read32(PLE_WINDOW)); | |
8035 | if (secondary_exec_control & SECONDARY_EXEC_ENABLE_VPID) | |
8036 | pr_err("Virtual processor ID = 0x%04x\n", | |
8037 | vmcs_read16(VIRTUAL_PROCESSOR_ID)); | |
8038 | } | |
8039 | ||
6aa8b732 AK |
8040 | /* |
8041 | * The guest has exited. See if we can fix it or if we need userspace | |
8042 | * assistance. | |
8043 | */ | |
851ba692 | 8044 | static int vmx_handle_exit(struct kvm_vcpu *vcpu) |
6aa8b732 | 8045 | { |
29bd8a78 | 8046 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
a0861c02 | 8047 | u32 exit_reason = vmx->exit_reason; |
1155f76a | 8048 | u32 vectoring_info = vmx->idt_vectoring_info; |
29bd8a78 | 8049 | |
843e4330 KH |
8050 | /* |
8051 | * Flush logged GPAs PML buffer, this will make dirty_bitmap more | |
8052 | * updated. Another good is, in kvm_vm_ioctl_get_dirty_log, before | |
8053 | * querying dirty_bitmap, we only need to kick all vcpus out of guest | |
8054 | * mode as if vcpus is in root mode, the PML buffer must has been | |
8055 | * flushed already. | |
8056 | */ | |
8057 | if (enable_pml) | |
54bf36aa | 8058 | vmx_flush_pml_buffer(vcpu); |
843e4330 | 8059 | |
80ced186 | 8060 | /* If guest state is invalid, start emulating */ |
14168786 | 8061 | if (vmx->emulation_required) |
80ced186 | 8062 | return handle_invalid_guest_state(vcpu); |
1d5a4d9b | 8063 | |
644d711a | 8064 | if (is_guest_mode(vcpu) && nested_vmx_exit_handled(vcpu)) { |
533558bc JK |
8065 | nested_vmx_vmexit(vcpu, exit_reason, |
8066 | vmcs_read32(VM_EXIT_INTR_INFO), | |
8067 | vmcs_readl(EXIT_QUALIFICATION)); | |
644d711a NHE |
8068 | return 1; |
8069 | } | |
8070 | ||
5120702e | 8071 | if (exit_reason & VMX_EXIT_REASONS_FAILED_VMENTRY) { |
4eb64dce | 8072 | dump_vmcs(); |
5120702e MG |
8073 | vcpu->run->exit_reason = KVM_EXIT_FAIL_ENTRY; |
8074 | vcpu->run->fail_entry.hardware_entry_failure_reason | |
8075 | = exit_reason; | |
8076 | return 0; | |
8077 | } | |
8078 | ||
29bd8a78 | 8079 | if (unlikely(vmx->fail)) { |
851ba692 AK |
8080 | vcpu->run->exit_reason = KVM_EXIT_FAIL_ENTRY; |
8081 | vcpu->run->fail_entry.hardware_entry_failure_reason | |
29bd8a78 AK |
8082 | = vmcs_read32(VM_INSTRUCTION_ERROR); |
8083 | return 0; | |
8084 | } | |
6aa8b732 | 8085 | |
b9bf6882 XG |
8086 | /* |
8087 | * Note: | |
8088 | * Do not try to fix EXIT_REASON_EPT_MISCONFIG if it caused by | |
8089 | * delivery event since it indicates guest is accessing MMIO. | |
8090 | * The vm-exit can be triggered again after return to guest that | |
8091 | * will cause infinite loop. | |
8092 | */ | |
d77c26fc | 8093 | if ((vectoring_info & VECTORING_INFO_VALID_MASK) && |
1439442c | 8094 | (exit_reason != EXIT_REASON_EXCEPTION_NMI && |
60637aac | 8095 | exit_reason != EXIT_REASON_EPT_VIOLATION && |
b9bf6882 XG |
8096 | exit_reason != EXIT_REASON_TASK_SWITCH)) { |
8097 | vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR; | |
8098 | vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_DELIVERY_EV; | |
8099 | vcpu->run->internal.ndata = 2; | |
8100 | vcpu->run->internal.data[0] = vectoring_info; | |
8101 | vcpu->run->internal.data[1] = exit_reason; | |
8102 | return 0; | |
8103 | } | |
3b86cd99 | 8104 | |
644d711a NHE |
8105 | if (unlikely(!cpu_has_virtual_nmis() && vmx->soft_vnmi_blocked && |
8106 | !(is_guest_mode(vcpu) && nested_cpu_has_virtual_nmis( | |
f5c4368f | 8107 | get_vmcs12(vcpu))))) { |
c4282df9 | 8108 | if (vmx_interrupt_allowed(vcpu)) { |
3b86cd99 | 8109 | vmx->soft_vnmi_blocked = 0; |
3b86cd99 | 8110 | } else if (vmx->vnmi_blocked_time > 1000000000LL && |
4531220b | 8111 | vcpu->arch.nmi_pending) { |
3b86cd99 JK |
8112 | /* |
8113 | * This CPU don't support us in finding the end of an | |
8114 | * NMI-blocked window if the guest runs with IRQs | |
8115 | * disabled. So we pull the trigger after 1 s of | |
8116 | * futile waiting, but inform the user about this. | |
8117 | */ | |
8118 | printk(KERN_WARNING "%s: Breaking out of NMI-blocked " | |
8119 | "state on VCPU %d after 1 s timeout\n", | |
8120 | __func__, vcpu->vcpu_id); | |
8121 | vmx->soft_vnmi_blocked = 0; | |
3b86cd99 | 8122 | } |
3b86cd99 JK |
8123 | } |
8124 | ||
6aa8b732 AK |
8125 | if (exit_reason < kvm_vmx_max_exit_handlers |
8126 | && kvm_vmx_exit_handlers[exit_reason]) | |
851ba692 | 8127 | return kvm_vmx_exit_handlers[exit_reason](vcpu); |
6aa8b732 | 8128 | else { |
2bc19dc3 MT |
8129 | WARN_ONCE(1, "vmx: unexpected exit reason 0x%x\n", exit_reason); |
8130 | kvm_queue_exception(vcpu, UD_VECTOR); | |
8131 | return 1; | |
6aa8b732 | 8132 | } |
6aa8b732 AK |
8133 | } |
8134 | ||
95ba8273 | 8135 | static void update_cr8_intercept(struct kvm_vcpu *vcpu, int tpr, int irr) |
6e5d865c | 8136 | { |
a7c0b07d WL |
8137 | struct vmcs12 *vmcs12 = get_vmcs12(vcpu); |
8138 | ||
8139 | if (is_guest_mode(vcpu) && | |
8140 | nested_cpu_has(vmcs12, CPU_BASED_TPR_SHADOW)) | |
8141 | return; | |
8142 | ||
95ba8273 | 8143 | if (irr == -1 || tpr < irr) { |
6e5d865c YS |
8144 | vmcs_write32(TPR_THRESHOLD, 0); |
8145 | return; | |
8146 | } | |
8147 | ||
95ba8273 | 8148 | vmcs_write32(TPR_THRESHOLD, irr); |
6e5d865c YS |
8149 | } |
8150 | ||
8d14695f YZ |
8151 | static void vmx_set_virtual_x2apic_mode(struct kvm_vcpu *vcpu, bool set) |
8152 | { | |
8153 | u32 sec_exec_control; | |
8154 | ||
8155 | /* | |
8156 | * There is not point to enable virtualize x2apic without enable | |
8157 | * apicv | |
8158 | */ | |
c7c9c56c | 8159 | if (!cpu_has_vmx_virtualize_x2apic_mode() || |
35754c98 | 8160 | !vmx_cpu_uses_apicv(vcpu)) |
8d14695f YZ |
8161 | return; |
8162 | ||
35754c98 | 8163 | if (!cpu_need_tpr_shadow(vcpu)) |
8d14695f YZ |
8164 | return; |
8165 | ||
8166 | sec_exec_control = vmcs_read32(SECONDARY_VM_EXEC_CONTROL); | |
8167 | ||
8168 | if (set) { | |
8169 | sec_exec_control &= ~SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES; | |
8170 | sec_exec_control |= SECONDARY_EXEC_VIRTUALIZE_X2APIC_MODE; | |
8171 | } else { | |
8172 | sec_exec_control &= ~SECONDARY_EXEC_VIRTUALIZE_X2APIC_MODE; | |
8173 | sec_exec_control |= SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES; | |
8174 | } | |
8175 | vmcs_write32(SECONDARY_VM_EXEC_CONTROL, sec_exec_control); | |
8176 | ||
8177 | vmx_set_msr_bitmap(vcpu); | |
8178 | } | |
8179 | ||
38b99173 TC |
8180 | static void vmx_set_apic_access_page_addr(struct kvm_vcpu *vcpu, hpa_t hpa) |
8181 | { | |
8182 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
8183 | ||
8184 | /* | |
8185 | * Currently we do not handle the nested case where L2 has an | |
8186 | * APIC access page of its own; that page is still pinned. | |
8187 | * Hence, we skip the case where the VCPU is in guest mode _and_ | |
8188 | * L1 prepared an APIC access page for L2. | |
8189 | * | |
8190 | * For the case where L1 and L2 share the same APIC access page | |
8191 | * (flexpriority=Y but SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES clear | |
8192 | * in the vmcs12), this function will only update either the vmcs01 | |
8193 | * or the vmcs02. If the former, the vmcs02 will be updated by | |
8194 | * prepare_vmcs02. If the latter, the vmcs01 will be updated in | |
8195 | * the next L2->L1 exit. | |
8196 | */ | |
8197 | if (!is_guest_mode(vcpu) || | |
8198 | !nested_cpu_has2(vmx->nested.current_vmcs12, | |
8199 | SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES)) | |
8200 | vmcs_write64(APIC_ACCESS_ADDR, hpa); | |
8201 | } | |
8202 | ||
c7c9c56c YZ |
8203 | static void vmx_hwapic_isr_update(struct kvm *kvm, int isr) |
8204 | { | |
8205 | u16 status; | |
8206 | u8 old; | |
8207 | ||
c7c9c56c YZ |
8208 | if (isr == -1) |
8209 | isr = 0; | |
8210 | ||
8211 | status = vmcs_read16(GUEST_INTR_STATUS); | |
8212 | old = status >> 8; | |
8213 | if (isr != old) { | |
8214 | status &= 0xff; | |
8215 | status |= isr << 8; | |
8216 | vmcs_write16(GUEST_INTR_STATUS, status); | |
8217 | } | |
8218 | } | |
8219 | ||
8220 | static void vmx_set_rvi(int vector) | |
8221 | { | |
8222 | u16 status; | |
8223 | u8 old; | |
8224 | ||
4114c27d WW |
8225 | if (vector == -1) |
8226 | vector = 0; | |
8227 | ||
c7c9c56c YZ |
8228 | status = vmcs_read16(GUEST_INTR_STATUS); |
8229 | old = (u8)status & 0xff; | |
8230 | if ((u8)vector != old) { | |
8231 | status &= ~0xff; | |
8232 | status |= (u8)vector; | |
8233 | vmcs_write16(GUEST_INTR_STATUS, status); | |
8234 | } | |
8235 | } | |
8236 | ||
8237 | static void vmx_hwapic_irr_update(struct kvm_vcpu *vcpu, int max_irr) | |
8238 | { | |
4114c27d WW |
8239 | if (!is_guest_mode(vcpu)) { |
8240 | vmx_set_rvi(max_irr); | |
8241 | return; | |
8242 | } | |
8243 | ||
c7c9c56c YZ |
8244 | if (max_irr == -1) |
8245 | return; | |
8246 | ||
963fee16 | 8247 | /* |
4114c27d WW |
8248 | * In guest mode. If a vmexit is needed, vmx_check_nested_events |
8249 | * handles it. | |
963fee16 | 8250 | */ |
4114c27d | 8251 | if (nested_exit_on_intr(vcpu)) |
963fee16 WL |
8252 | return; |
8253 | ||
963fee16 | 8254 | /* |
4114c27d | 8255 | * Else, fall back to pre-APICv interrupt injection since L2 |
963fee16 WL |
8256 | * is run without virtual interrupt delivery. |
8257 | */ | |
8258 | if (!kvm_event_needs_reinjection(vcpu) && | |
8259 | vmx_interrupt_allowed(vcpu)) { | |
8260 | kvm_queue_interrupt(vcpu, max_irr, false); | |
8261 | vmx_inject_irq(vcpu); | |
8262 | } | |
c7c9c56c YZ |
8263 | } |
8264 | ||
3bb345f3 | 8265 | static void vmx_load_eoi_exitmap(struct kvm_vcpu *vcpu) |
c7c9c56c | 8266 | { |
3bb345f3 | 8267 | u64 *eoi_exit_bitmap = vcpu->arch.eoi_exit_bitmap; |
35754c98 | 8268 | if (!vmx_cpu_uses_apicv(vcpu)) |
3d81bc7e YZ |
8269 | return; |
8270 | ||
c7c9c56c YZ |
8271 | vmcs_write64(EOI_EXIT_BITMAP0, eoi_exit_bitmap[0]); |
8272 | vmcs_write64(EOI_EXIT_BITMAP1, eoi_exit_bitmap[1]); | |
8273 | vmcs_write64(EOI_EXIT_BITMAP2, eoi_exit_bitmap[2]); | |
8274 | vmcs_write64(EOI_EXIT_BITMAP3, eoi_exit_bitmap[3]); | |
8275 | } | |
8276 | ||
51aa01d1 | 8277 | static void vmx_complete_atomic_exit(struct vcpu_vmx *vmx) |
cf393f75 | 8278 | { |
00eba012 AK |
8279 | u32 exit_intr_info; |
8280 | ||
8281 | if (!(vmx->exit_reason == EXIT_REASON_MCE_DURING_VMENTRY | |
8282 | || vmx->exit_reason == EXIT_REASON_EXCEPTION_NMI)) | |
8283 | return; | |
8284 | ||
c5ca8e57 | 8285 | vmx->exit_intr_info = vmcs_read32(VM_EXIT_INTR_INFO); |
00eba012 | 8286 | exit_intr_info = vmx->exit_intr_info; |
a0861c02 AK |
8287 | |
8288 | /* Handle machine checks before interrupts are enabled */ | |
00eba012 | 8289 | if (is_machine_check(exit_intr_info)) |
a0861c02 AK |
8290 | kvm_machine_check(); |
8291 | ||
20f65983 | 8292 | /* We need to handle NMIs before interrupts are enabled */ |
00eba012 | 8293 | if ((exit_intr_info & INTR_INFO_INTR_TYPE_MASK) == INTR_TYPE_NMI_INTR && |
ff9d07a0 ZY |
8294 | (exit_intr_info & INTR_INFO_VALID_MASK)) { |
8295 | kvm_before_handle_nmi(&vmx->vcpu); | |
20f65983 | 8296 | asm("int $2"); |
ff9d07a0 ZY |
8297 | kvm_after_handle_nmi(&vmx->vcpu); |
8298 | } | |
51aa01d1 | 8299 | } |
20f65983 | 8300 | |
a547c6db YZ |
8301 | static void vmx_handle_external_intr(struct kvm_vcpu *vcpu) |
8302 | { | |
8303 | u32 exit_intr_info = vmcs_read32(VM_EXIT_INTR_INFO); | |
8304 | ||
8305 | /* | |
8306 | * If external interrupt exists, IF bit is set in rflags/eflags on the | |
8307 | * interrupt stack frame, and interrupt will be enabled on a return | |
8308 | * from interrupt handler. | |
8309 | */ | |
8310 | if ((exit_intr_info & (INTR_INFO_VALID_MASK | INTR_INFO_INTR_TYPE_MASK)) | |
8311 | == (INTR_INFO_VALID_MASK | INTR_TYPE_EXT_INTR)) { | |
8312 | unsigned int vector; | |
8313 | unsigned long entry; | |
8314 | gate_desc *desc; | |
8315 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
8316 | #ifdef CONFIG_X86_64 | |
8317 | unsigned long tmp; | |
8318 | #endif | |
8319 | ||
8320 | vector = exit_intr_info & INTR_INFO_VECTOR_MASK; | |
8321 | desc = (gate_desc *)vmx->host_idt_base + vector; | |
8322 | entry = gate_offset(*desc); | |
8323 | asm volatile( | |
8324 | #ifdef CONFIG_X86_64 | |
8325 | "mov %%" _ASM_SP ", %[sp]\n\t" | |
8326 | "and $0xfffffffffffffff0, %%" _ASM_SP "\n\t" | |
8327 | "push $%c[ss]\n\t" | |
8328 | "push %[sp]\n\t" | |
8329 | #endif | |
8330 | "pushf\n\t" | |
8331 | "orl $0x200, (%%" _ASM_SP ")\n\t" | |
8332 | __ASM_SIZE(push) " $%c[cs]\n\t" | |
8333 | "call *%[entry]\n\t" | |
8334 | : | |
8335 | #ifdef CONFIG_X86_64 | |
8336 | [sp]"=&r"(tmp) | |
8337 | #endif | |
8338 | : | |
8339 | [entry]"r"(entry), | |
8340 | [ss]"i"(__KERNEL_DS), | |
8341 | [cs]"i"(__KERNEL_CS) | |
8342 | ); | |
8343 | } else | |
8344 | local_irq_enable(); | |
8345 | } | |
8346 | ||
6d396b55 PB |
8347 | static bool vmx_has_high_real_mode_segbase(void) |
8348 | { | |
8349 | return enable_unrestricted_guest || emulate_invalid_guest_state; | |
8350 | } | |
8351 | ||
da8999d3 LJ |
8352 | static bool vmx_mpx_supported(void) |
8353 | { | |
8354 | return (vmcs_config.vmexit_ctrl & VM_EXIT_CLEAR_BNDCFGS) && | |
8355 | (vmcs_config.vmentry_ctrl & VM_ENTRY_LOAD_BNDCFGS); | |
8356 | } | |
8357 | ||
55412b2e WL |
8358 | static bool vmx_xsaves_supported(void) |
8359 | { | |
8360 | return vmcs_config.cpu_based_2nd_exec_ctrl & | |
8361 | SECONDARY_EXEC_XSAVES; | |
8362 | } | |
8363 | ||
51aa01d1 AK |
8364 | static void vmx_recover_nmi_blocking(struct vcpu_vmx *vmx) |
8365 | { | |
c5ca8e57 | 8366 | u32 exit_intr_info; |
51aa01d1 AK |
8367 | bool unblock_nmi; |
8368 | u8 vector; | |
8369 | bool idtv_info_valid; | |
8370 | ||
8371 | idtv_info_valid = vmx->idt_vectoring_info & VECTORING_INFO_VALID_MASK; | |
20f65983 | 8372 | |
cf393f75 | 8373 | if (cpu_has_virtual_nmis()) { |
9d58b931 AK |
8374 | if (vmx->nmi_known_unmasked) |
8375 | return; | |
c5ca8e57 AK |
8376 | /* |
8377 | * Can't use vmx->exit_intr_info since we're not sure what | |
8378 | * the exit reason is. | |
8379 | */ | |
8380 | exit_intr_info = vmcs_read32(VM_EXIT_INTR_INFO); | |
cf393f75 AK |
8381 | unblock_nmi = (exit_intr_info & INTR_INFO_UNBLOCK_NMI) != 0; |
8382 | vector = exit_intr_info & INTR_INFO_VECTOR_MASK; | |
8383 | /* | |
7b4a25cb | 8384 | * SDM 3: 27.7.1.2 (September 2008) |
cf393f75 AK |
8385 | * Re-set bit "block by NMI" before VM entry if vmexit caused by |
8386 | * a guest IRET fault. | |
7b4a25cb GN |
8387 | * SDM 3: 23.2.2 (September 2008) |
8388 | * Bit 12 is undefined in any of the following cases: | |
8389 | * If the VM exit sets the valid bit in the IDT-vectoring | |
8390 | * information field. | |
8391 | * If the VM exit is due to a double fault. | |
cf393f75 | 8392 | */ |
7b4a25cb GN |
8393 | if ((exit_intr_info & INTR_INFO_VALID_MASK) && unblock_nmi && |
8394 | vector != DF_VECTOR && !idtv_info_valid) | |
cf393f75 AK |
8395 | vmcs_set_bits(GUEST_INTERRUPTIBILITY_INFO, |
8396 | GUEST_INTR_STATE_NMI); | |
9d58b931 AK |
8397 | else |
8398 | vmx->nmi_known_unmasked = | |
8399 | !(vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) | |
8400 | & GUEST_INTR_STATE_NMI); | |
3b86cd99 JK |
8401 | } else if (unlikely(vmx->soft_vnmi_blocked)) |
8402 | vmx->vnmi_blocked_time += | |
8403 | ktime_to_ns(ktime_sub(ktime_get(), vmx->entry_time)); | |
51aa01d1 AK |
8404 | } |
8405 | ||
3ab66e8a | 8406 | static void __vmx_complete_interrupts(struct kvm_vcpu *vcpu, |
83422e17 AK |
8407 | u32 idt_vectoring_info, |
8408 | int instr_len_field, | |
8409 | int error_code_field) | |
51aa01d1 | 8410 | { |
51aa01d1 AK |
8411 | u8 vector; |
8412 | int type; | |
8413 | bool idtv_info_valid; | |
8414 | ||
8415 | idtv_info_valid = idt_vectoring_info & VECTORING_INFO_VALID_MASK; | |
668f612f | 8416 | |
3ab66e8a JK |
8417 | vcpu->arch.nmi_injected = false; |
8418 | kvm_clear_exception_queue(vcpu); | |
8419 | kvm_clear_interrupt_queue(vcpu); | |
37b96e98 GN |
8420 | |
8421 | if (!idtv_info_valid) | |
8422 | return; | |
8423 | ||
3ab66e8a | 8424 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
3842d135 | 8425 | |
668f612f AK |
8426 | vector = idt_vectoring_info & VECTORING_INFO_VECTOR_MASK; |
8427 | type = idt_vectoring_info & VECTORING_INFO_TYPE_MASK; | |
37b96e98 | 8428 | |
64a7ec06 | 8429 | switch (type) { |
37b96e98 | 8430 | case INTR_TYPE_NMI_INTR: |
3ab66e8a | 8431 | vcpu->arch.nmi_injected = true; |
668f612f | 8432 | /* |
7b4a25cb | 8433 | * SDM 3: 27.7.1.2 (September 2008) |
37b96e98 GN |
8434 | * Clear bit "block by NMI" before VM entry if a NMI |
8435 | * delivery faulted. | |
668f612f | 8436 | */ |
3ab66e8a | 8437 | vmx_set_nmi_mask(vcpu, false); |
37b96e98 | 8438 | break; |
37b96e98 | 8439 | case INTR_TYPE_SOFT_EXCEPTION: |
3ab66e8a | 8440 | vcpu->arch.event_exit_inst_len = vmcs_read32(instr_len_field); |
66fd3f7f GN |
8441 | /* fall through */ |
8442 | case INTR_TYPE_HARD_EXCEPTION: | |
35920a35 | 8443 | if (idt_vectoring_info & VECTORING_INFO_DELIVER_CODE_MASK) { |
83422e17 | 8444 | u32 err = vmcs_read32(error_code_field); |
851eb667 | 8445 | kvm_requeue_exception_e(vcpu, vector, err); |
35920a35 | 8446 | } else |
851eb667 | 8447 | kvm_requeue_exception(vcpu, vector); |
37b96e98 | 8448 | break; |
66fd3f7f | 8449 | case INTR_TYPE_SOFT_INTR: |
3ab66e8a | 8450 | vcpu->arch.event_exit_inst_len = vmcs_read32(instr_len_field); |
66fd3f7f | 8451 | /* fall through */ |
37b96e98 | 8452 | case INTR_TYPE_EXT_INTR: |
3ab66e8a | 8453 | kvm_queue_interrupt(vcpu, vector, type == INTR_TYPE_SOFT_INTR); |
37b96e98 GN |
8454 | break; |
8455 | default: | |
8456 | break; | |
f7d9238f | 8457 | } |
cf393f75 AK |
8458 | } |
8459 | ||
83422e17 AK |
8460 | static void vmx_complete_interrupts(struct vcpu_vmx *vmx) |
8461 | { | |
3ab66e8a | 8462 | __vmx_complete_interrupts(&vmx->vcpu, vmx->idt_vectoring_info, |
83422e17 AK |
8463 | VM_EXIT_INSTRUCTION_LEN, |
8464 | IDT_VECTORING_ERROR_CODE); | |
8465 | } | |
8466 | ||
b463a6f7 AK |
8467 | static void vmx_cancel_injection(struct kvm_vcpu *vcpu) |
8468 | { | |
3ab66e8a | 8469 | __vmx_complete_interrupts(vcpu, |
b463a6f7 AK |
8470 | vmcs_read32(VM_ENTRY_INTR_INFO_FIELD), |
8471 | VM_ENTRY_INSTRUCTION_LEN, | |
8472 | VM_ENTRY_EXCEPTION_ERROR_CODE); | |
8473 | ||
8474 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, 0); | |
8475 | } | |
8476 | ||
d7cd9796 GN |
8477 | static void atomic_switch_perf_msrs(struct vcpu_vmx *vmx) |
8478 | { | |
8479 | int i, nr_msrs; | |
8480 | struct perf_guest_switch_msr *msrs; | |
8481 | ||
8482 | msrs = perf_guest_get_msrs(&nr_msrs); | |
8483 | ||
8484 | if (!msrs) | |
8485 | return; | |
8486 | ||
8487 | for (i = 0; i < nr_msrs; i++) | |
8488 | if (msrs[i].host == msrs[i].guest) | |
8489 | clear_atomic_switch_msr(vmx, msrs[i].msr); | |
8490 | else | |
8491 | add_atomic_switch_msr(vmx, msrs[i].msr, msrs[i].guest, | |
8492 | msrs[i].host); | |
8493 | } | |
8494 | ||
a3b5ba49 | 8495 | static void __noclone vmx_vcpu_run(struct kvm_vcpu *vcpu) |
6aa8b732 | 8496 | { |
a2fa3e9f | 8497 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
d974baa3 | 8498 | unsigned long debugctlmsr, cr4; |
104f226b AK |
8499 | |
8500 | /* Record the guest's net vcpu time for enforced NMI injections. */ | |
8501 | if (unlikely(!cpu_has_virtual_nmis() && vmx->soft_vnmi_blocked)) | |
8502 | vmx->entry_time = ktime_get(); | |
8503 | ||
8504 | /* Don't enter VMX if guest state is invalid, let the exit handler | |
8505 | start emulation until we arrive back to a valid state */ | |
14168786 | 8506 | if (vmx->emulation_required) |
104f226b AK |
8507 | return; |
8508 | ||
a7653ecd RK |
8509 | if (vmx->ple_window_dirty) { |
8510 | vmx->ple_window_dirty = false; | |
8511 | vmcs_write32(PLE_WINDOW, vmx->ple_window); | |
8512 | } | |
8513 | ||
012f83cb AG |
8514 | if (vmx->nested.sync_shadow_vmcs) { |
8515 | copy_vmcs12_to_shadow(vmx); | |
8516 | vmx->nested.sync_shadow_vmcs = false; | |
8517 | } | |
8518 | ||
104f226b AK |
8519 | if (test_bit(VCPU_REGS_RSP, (unsigned long *)&vcpu->arch.regs_dirty)) |
8520 | vmcs_writel(GUEST_RSP, vcpu->arch.regs[VCPU_REGS_RSP]); | |
8521 | if (test_bit(VCPU_REGS_RIP, (unsigned long *)&vcpu->arch.regs_dirty)) | |
8522 | vmcs_writel(GUEST_RIP, vcpu->arch.regs[VCPU_REGS_RIP]); | |
8523 | ||
1e02ce4c | 8524 | cr4 = cr4_read_shadow(); |
d974baa3 AL |
8525 | if (unlikely(cr4 != vmx->host_state.vmcs_host_cr4)) { |
8526 | vmcs_writel(HOST_CR4, cr4); | |
8527 | vmx->host_state.vmcs_host_cr4 = cr4; | |
8528 | } | |
8529 | ||
104f226b AK |
8530 | /* When single-stepping over STI and MOV SS, we must clear the |
8531 | * corresponding interruptibility bits in the guest state. Otherwise | |
8532 | * vmentry fails as it then expects bit 14 (BS) in pending debug | |
8533 | * exceptions being set, but that's not correct for the guest debugging | |
8534 | * case. */ | |
8535 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) | |
8536 | vmx_set_interrupt_shadow(vcpu, 0); | |
8537 | ||
d7cd9796 | 8538 | atomic_switch_perf_msrs(vmx); |
2a7921b7 | 8539 | debugctlmsr = get_debugctlmsr(); |
d7cd9796 | 8540 | |
d462b819 | 8541 | vmx->__launched = vmx->loaded_vmcs->launched; |
104f226b | 8542 | asm( |
6aa8b732 | 8543 | /* Store host registers */ |
b188c81f AK |
8544 | "push %%" _ASM_DX "; push %%" _ASM_BP ";" |
8545 | "push %%" _ASM_CX " \n\t" /* placeholder for guest rcx */ | |
8546 | "push %%" _ASM_CX " \n\t" | |
8547 | "cmp %%" _ASM_SP ", %c[host_rsp](%0) \n\t" | |
313dbd49 | 8548 | "je 1f \n\t" |
b188c81f | 8549 | "mov %%" _ASM_SP ", %c[host_rsp](%0) \n\t" |
4ecac3fd | 8550 | __ex(ASM_VMX_VMWRITE_RSP_RDX) "\n\t" |
313dbd49 | 8551 | "1: \n\t" |
d3edefc0 | 8552 | /* Reload cr2 if changed */ |
b188c81f AK |
8553 | "mov %c[cr2](%0), %%" _ASM_AX " \n\t" |
8554 | "mov %%cr2, %%" _ASM_DX " \n\t" | |
8555 | "cmp %%" _ASM_AX ", %%" _ASM_DX " \n\t" | |
d3edefc0 | 8556 | "je 2f \n\t" |
b188c81f | 8557 | "mov %%" _ASM_AX", %%cr2 \n\t" |
d3edefc0 | 8558 | "2: \n\t" |
6aa8b732 | 8559 | /* Check if vmlaunch of vmresume is needed */ |
e08aa78a | 8560 | "cmpl $0, %c[launched](%0) \n\t" |
6aa8b732 | 8561 | /* Load guest registers. Don't clobber flags. */ |
b188c81f AK |
8562 | "mov %c[rax](%0), %%" _ASM_AX " \n\t" |
8563 | "mov %c[rbx](%0), %%" _ASM_BX " \n\t" | |
8564 | "mov %c[rdx](%0), %%" _ASM_DX " \n\t" | |
8565 | "mov %c[rsi](%0), %%" _ASM_SI " \n\t" | |
8566 | "mov %c[rdi](%0), %%" _ASM_DI " \n\t" | |
8567 | "mov %c[rbp](%0), %%" _ASM_BP " \n\t" | |
05b3e0c2 | 8568 | #ifdef CONFIG_X86_64 |
e08aa78a AK |
8569 | "mov %c[r8](%0), %%r8 \n\t" |
8570 | "mov %c[r9](%0), %%r9 \n\t" | |
8571 | "mov %c[r10](%0), %%r10 \n\t" | |
8572 | "mov %c[r11](%0), %%r11 \n\t" | |
8573 | "mov %c[r12](%0), %%r12 \n\t" | |
8574 | "mov %c[r13](%0), %%r13 \n\t" | |
8575 | "mov %c[r14](%0), %%r14 \n\t" | |
8576 | "mov %c[r15](%0), %%r15 \n\t" | |
6aa8b732 | 8577 | #endif |
b188c81f | 8578 | "mov %c[rcx](%0), %%" _ASM_CX " \n\t" /* kills %0 (ecx) */ |
c801949d | 8579 | |
6aa8b732 | 8580 | /* Enter guest mode */ |
83287ea4 | 8581 | "jne 1f \n\t" |
4ecac3fd | 8582 | __ex(ASM_VMX_VMLAUNCH) "\n\t" |
83287ea4 AK |
8583 | "jmp 2f \n\t" |
8584 | "1: " __ex(ASM_VMX_VMRESUME) "\n\t" | |
8585 | "2: " | |
6aa8b732 | 8586 | /* Save guest registers, load host registers, keep flags */ |
b188c81f | 8587 | "mov %0, %c[wordsize](%%" _ASM_SP ") \n\t" |
40712fae | 8588 | "pop %0 \n\t" |
b188c81f AK |
8589 | "mov %%" _ASM_AX ", %c[rax](%0) \n\t" |
8590 | "mov %%" _ASM_BX ", %c[rbx](%0) \n\t" | |
8591 | __ASM_SIZE(pop) " %c[rcx](%0) \n\t" | |
8592 | "mov %%" _ASM_DX ", %c[rdx](%0) \n\t" | |
8593 | "mov %%" _ASM_SI ", %c[rsi](%0) \n\t" | |
8594 | "mov %%" _ASM_DI ", %c[rdi](%0) \n\t" | |
8595 | "mov %%" _ASM_BP ", %c[rbp](%0) \n\t" | |
05b3e0c2 | 8596 | #ifdef CONFIG_X86_64 |
e08aa78a AK |
8597 | "mov %%r8, %c[r8](%0) \n\t" |
8598 | "mov %%r9, %c[r9](%0) \n\t" | |
8599 | "mov %%r10, %c[r10](%0) \n\t" | |
8600 | "mov %%r11, %c[r11](%0) \n\t" | |
8601 | "mov %%r12, %c[r12](%0) \n\t" | |
8602 | "mov %%r13, %c[r13](%0) \n\t" | |
8603 | "mov %%r14, %c[r14](%0) \n\t" | |
8604 | "mov %%r15, %c[r15](%0) \n\t" | |
6aa8b732 | 8605 | #endif |
b188c81f AK |
8606 | "mov %%cr2, %%" _ASM_AX " \n\t" |
8607 | "mov %%" _ASM_AX ", %c[cr2](%0) \n\t" | |
c801949d | 8608 | |
b188c81f | 8609 | "pop %%" _ASM_BP "; pop %%" _ASM_DX " \n\t" |
e08aa78a | 8610 | "setbe %c[fail](%0) \n\t" |
83287ea4 AK |
8611 | ".pushsection .rodata \n\t" |
8612 | ".global vmx_return \n\t" | |
8613 | "vmx_return: " _ASM_PTR " 2b \n\t" | |
8614 | ".popsection" | |
e08aa78a | 8615 | : : "c"(vmx), "d"((unsigned long)HOST_RSP), |
d462b819 | 8616 | [launched]"i"(offsetof(struct vcpu_vmx, __launched)), |
e08aa78a | 8617 | [fail]"i"(offsetof(struct vcpu_vmx, fail)), |
313dbd49 | 8618 | [host_rsp]"i"(offsetof(struct vcpu_vmx, host_rsp)), |
ad312c7c ZX |
8619 | [rax]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RAX])), |
8620 | [rbx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RBX])), | |
8621 | [rcx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RCX])), | |
8622 | [rdx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RDX])), | |
8623 | [rsi]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RSI])), | |
8624 | [rdi]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RDI])), | |
8625 | [rbp]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RBP])), | |
05b3e0c2 | 8626 | #ifdef CONFIG_X86_64 |
ad312c7c ZX |
8627 | [r8]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R8])), |
8628 | [r9]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R9])), | |
8629 | [r10]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R10])), | |
8630 | [r11]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R11])), | |
8631 | [r12]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R12])), | |
8632 | [r13]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R13])), | |
8633 | [r14]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R14])), | |
8634 | [r15]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R15])), | |
6aa8b732 | 8635 | #endif |
40712fae AK |
8636 | [cr2]"i"(offsetof(struct vcpu_vmx, vcpu.arch.cr2)), |
8637 | [wordsize]"i"(sizeof(ulong)) | |
c2036300 LV |
8638 | : "cc", "memory" |
8639 | #ifdef CONFIG_X86_64 | |
b188c81f | 8640 | , "rax", "rbx", "rdi", "rsi" |
c2036300 | 8641 | , "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15" |
b188c81f AK |
8642 | #else |
8643 | , "eax", "ebx", "edi", "esi" | |
c2036300 LV |
8644 | #endif |
8645 | ); | |
6aa8b732 | 8646 | |
2a7921b7 GN |
8647 | /* MSR_IA32_DEBUGCTLMSR is zeroed on vmexit. Restore it if needed */ |
8648 | if (debugctlmsr) | |
8649 | update_debugctlmsr(debugctlmsr); | |
8650 | ||
aa67f609 AK |
8651 | #ifndef CONFIG_X86_64 |
8652 | /* | |
8653 | * The sysexit path does not restore ds/es, so we must set them to | |
8654 | * a reasonable value ourselves. | |
8655 | * | |
8656 | * We can't defer this to vmx_load_host_state() since that function | |
8657 | * may be executed in interrupt context, which saves and restore segments | |
8658 | * around it, nullifying its effect. | |
8659 | */ | |
8660 | loadsegment(ds, __USER_DS); | |
8661 | loadsegment(es, __USER_DS); | |
8662 | #endif | |
8663 | ||
6de4f3ad | 8664 | vcpu->arch.regs_avail = ~((1 << VCPU_REGS_RIP) | (1 << VCPU_REGS_RSP) |
6de12732 | 8665 | | (1 << VCPU_EXREG_RFLAGS) |
aff48baa | 8666 | | (1 << VCPU_EXREG_PDPTR) |
2fb92db1 | 8667 | | (1 << VCPU_EXREG_SEGMENTS) |
aff48baa | 8668 | | (1 << VCPU_EXREG_CR3)); |
5fdbf976 MT |
8669 | vcpu->arch.regs_dirty = 0; |
8670 | ||
1155f76a AK |
8671 | vmx->idt_vectoring_info = vmcs_read32(IDT_VECTORING_INFO_FIELD); |
8672 | ||
d462b819 | 8673 | vmx->loaded_vmcs->launched = 1; |
1b6269db | 8674 | |
51aa01d1 | 8675 | vmx->exit_reason = vmcs_read32(VM_EXIT_REASON); |
1e2b1dd7 | 8676 | trace_kvm_exit(vmx->exit_reason, vcpu, KVM_ISA_VMX); |
51aa01d1 | 8677 | |
e0b890d3 GN |
8678 | /* |
8679 | * the KVM_REQ_EVENT optimization bit is only on for one entry, and if | |
8680 | * we did not inject a still-pending event to L1 now because of | |
8681 | * nested_run_pending, we need to re-enable this bit. | |
8682 | */ | |
8683 | if (vmx->nested.nested_run_pending) | |
8684 | kvm_make_request(KVM_REQ_EVENT, vcpu); | |
8685 | ||
8686 | vmx->nested.nested_run_pending = 0; | |
8687 | ||
51aa01d1 AK |
8688 | vmx_complete_atomic_exit(vmx); |
8689 | vmx_recover_nmi_blocking(vmx); | |
cf393f75 | 8690 | vmx_complete_interrupts(vmx); |
6aa8b732 AK |
8691 | } |
8692 | ||
4fa7734c PB |
8693 | static void vmx_load_vmcs01(struct kvm_vcpu *vcpu) |
8694 | { | |
8695 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
8696 | int cpu; | |
8697 | ||
8698 | if (vmx->loaded_vmcs == &vmx->vmcs01) | |
8699 | return; | |
8700 | ||
8701 | cpu = get_cpu(); | |
8702 | vmx->loaded_vmcs = &vmx->vmcs01; | |
8703 | vmx_vcpu_put(vcpu); | |
8704 | vmx_vcpu_load(vcpu, cpu); | |
8705 | vcpu->cpu = cpu; | |
8706 | put_cpu(); | |
8707 | } | |
8708 | ||
6aa8b732 AK |
8709 | static void vmx_free_vcpu(struct kvm_vcpu *vcpu) |
8710 | { | |
fb3f0f51 RR |
8711 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
8712 | ||
843e4330 | 8713 | if (enable_pml) |
a3eaa864 | 8714 | vmx_destroy_pml_buffer(vmx); |
991e7a0e | 8715 | free_vpid(vmx->vpid); |
4fa7734c PB |
8716 | leave_guest_mode(vcpu); |
8717 | vmx_load_vmcs01(vcpu); | |
26a865f4 | 8718 | free_nested(vmx); |
4fa7734c | 8719 | free_loaded_vmcs(vmx->loaded_vmcs); |
fb3f0f51 RR |
8720 | kfree(vmx->guest_msrs); |
8721 | kvm_vcpu_uninit(vcpu); | |
a4770347 | 8722 | kmem_cache_free(kvm_vcpu_cache, vmx); |
6aa8b732 AK |
8723 | } |
8724 | ||
fb3f0f51 | 8725 | static struct kvm_vcpu *vmx_create_vcpu(struct kvm *kvm, unsigned int id) |
6aa8b732 | 8726 | { |
fb3f0f51 | 8727 | int err; |
c16f862d | 8728 | struct vcpu_vmx *vmx = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); |
15ad7146 | 8729 | int cpu; |
6aa8b732 | 8730 | |
a2fa3e9f | 8731 | if (!vmx) |
fb3f0f51 RR |
8732 | return ERR_PTR(-ENOMEM); |
8733 | ||
991e7a0e | 8734 | vmx->vpid = allocate_vpid(); |
2384d2b3 | 8735 | |
fb3f0f51 RR |
8736 | err = kvm_vcpu_init(&vmx->vcpu, kvm, id); |
8737 | if (err) | |
8738 | goto free_vcpu; | |
965b58a5 | 8739 | |
a2fa3e9f | 8740 | vmx->guest_msrs = kmalloc(PAGE_SIZE, GFP_KERNEL); |
03916db9 PB |
8741 | BUILD_BUG_ON(ARRAY_SIZE(vmx_msr_index) * sizeof(vmx->guest_msrs[0]) |
8742 | > PAGE_SIZE); | |
0123be42 | 8743 | |
be6d05cf | 8744 | err = -ENOMEM; |
fb3f0f51 | 8745 | if (!vmx->guest_msrs) { |
fb3f0f51 RR |
8746 | goto uninit_vcpu; |
8747 | } | |
965b58a5 | 8748 | |
d462b819 NHE |
8749 | vmx->loaded_vmcs = &vmx->vmcs01; |
8750 | vmx->loaded_vmcs->vmcs = alloc_vmcs(); | |
8751 | if (!vmx->loaded_vmcs->vmcs) | |
fb3f0f51 | 8752 | goto free_msrs; |
d462b819 NHE |
8753 | if (!vmm_exclusive) |
8754 | kvm_cpu_vmxon(__pa(per_cpu(vmxarea, raw_smp_processor_id()))); | |
8755 | loaded_vmcs_init(vmx->loaded_vmcs); | |
8756 | if (!vmm_exclusive) | |
8757 | kvm_cpu_vmxoff(); | |
a2fa3e9f | 8758 | |
15ad7146 AK |
8759 | cpu = get_cpu(); |
8760 | vmx_vcpu_load(&vmx->vcpu, cpu); | |
e48672fa | 8761 | vmx->vcpu.cpu = cpu; |
8b9cf98c | 8762 | err = vmx_vcpu_setup(vmx); |
fb3f0f51 | 8763 | vmx_vcpu_put(&vmx->vcpu); |
15ad7146 | 8764 | put_cpu(); |
fb3f0f51 RR |
8765 | if (err) |
8766 | goto free_vmcs; | |
35754c98 | 8767 | if (cpu_need_virtualize_apic_accesses(&vmx->vcpu)) { |
be6d05cf JK |
8768 | err = alloc_apic_access_page(kvm); |
8769 | if (err) | |
5e4a0b3c | 8770 | goto free_vmcs; |
a63cb560 | 8771 | } |
fb3f0f51 | 8772 | |
b927a3ce SY |
8773 | if (enable_ept) { |
8774 | if (!kvm->arch.ept_identity_map_addr) | |
8775 | kvm->arch.ept_identity_map_addr = | |
8776 | VMX_EPT_IDENTITY_PAGETABLE_ADDR; | |
f51770ed TC |
8777 | err = init_rmode_identity_map(kvm); |
8778 | if (err) | |
93ea5388 | 8779 | goto free_vmcs; |
b927a3ce | 8780 | } |
b7ebfb05 | 8781 | |
5c614b35 | 8782 | if (nested) { |
b9c237bb | 8783 | nested_vmx_setup_ctls_msrs(vmx); |
5c614b35 WL |
8784 | vmx->nested.vpid02 = allocate_vpid(); |
8785 | } | |
b9c237bb | 8786 | |
705699a1 | 8787 | vmx->nested.posted_intr_nv = -1; |
a9d30f33 NHE |
8788 | vmx->nested.current_vmptr = -1ull; |
8789 | vmx->nested.current_vmcs12 = NULL; | |
8790 | ||
843e4330 KH |
8791 | /* |
8792 | * If PML is turned on, failure on enabling PML just results in failure | |
8793 | * of creating the vcpu, therefore we can simplify PML logic (by | |
8794 | * avoiding dealing with cases, such as enabling PML partially on vcpus | |
8795 | * for the guest, etc. | |
8796 | */ | |
8797 | if (enable_pml) { | |
a3eaa864 | 8798 | err = vmx_create_pml_buffer(vmx); |
843e4330 KH |
8799 | if (err) |
8800 | goto free_vmcs; | |
8801 | } | |
8802 | ||
fb3f0f51 RR |
8803 | return &vmx->vcpu; |
8804 | ||
8805 | free_vmcs: | |
5c614b35 | 8806 | free_vpid(vmx->nested.vpid02); |
5f3fbc34 | 8807 | free_loaded_vmcs(vmx->loaded_vmcs); |
fb3f0f51 | 8808 | free_msrs: |
fb3f0f51 RR |
8809 | kfree(vmx->guest_msrs); |
8810 | uninit_vcpu: | |
8811 | kvm_vcpu_uninit(&vmx->vcpu); | |
8812 | free_vcpu: | |
991e7a0e | 8813 | free_vpid(vmx->vpid); |
a4770347 | 8814 | kmem_cache_free(kvm_vcpu_cache, vmx); |
fb3f0f51 | 8815 | return ERR_PTR(err); |
6aa8b732 AK |
8816 | } |
8817 | ||
002c7f7c YS |
8818 | static void __init vmx_check_processor_compat(void *rtn) |
8819 | { | |
8820 | struct vmcs_config vmcs_conf; | |
8821 | ||
8822 | *(int *)rtn = 0; | |
8823 | if (setup_vmcs_config(&vmcs_conf) < 0) | |
8824 | *(int *)rtn = -EIO; | |
8825 | if (memcmp(&vmcs_config, &vmcs_conf, sizeof(struct vmcs_config)) != 0) { | |
8826 | printk(KERN_ERR "kvm: CPU %d feature inconsistency!\n", | |
8827 | smp_processor_id()); | |
8828 | *(int *)rtn = -EIO; | |
8829 | } | |
8830 | } | |
8831 | ||
67253af5 SY |
8832 | static int get_ept_level(void) |
8833 | { | |
8834 | return VMX_EPT_DEFAULT_GAW + 1; | |
8835 | } | |
8836 | ||
4b12f0de | 8837 | static u64 vmx_get_mt_mask(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio) |
64d4d521 | 8838 | { |
b18d5431 XG |
8839 | u8 cache; |
8840 | u64 ipat = 0; | |
4b12f0de | 8841 | |
522c68c4 | 8842 | /* For VT-d and EPT combination |
606decd6 | 8843 | * 1. MMIO: always map as UC |
522c68c4 SY |
8844 | * 2. EPT with VT-d: |
8845 | * a. VT-d without snooping control feature: can't guarantee the | |
606decd6 | 8846 | * result, try to trust guest. |
522c68c4 SY |
8847 | * b. VT-d with snooping control feature: snooping control feature of |
8848 | * VT-d engine can guarantee the cache correctness. Just set it | |
8849 | * to WB to keep consistent with host. So the same as item 3. | |
a19a6d11 | 8850 | * 3. EPT without VT-d: always map as WB and set IPAT=1 to keep |
522c68c4 SY |
8851 | * consistent with host MTRR |
8852 | */ | |
606decd6 PB |
8853 | if (is_mmio) { |
8854 | cache = MTRR_TYPE_UNCACHABLE; | |
8855 | goto exit; | |
8856 | } | |
8857 | ||
8858 | if (!kvm_arch_has_noncoherent_dma(vcpu->kvm)) { | |
b18d5431 XG |
8859 | ipat = VMX_EPT_IPAT_BIT; |
8860 | cache = MTRR_TYPE_WRBACK; | |
8861 | goto exit; | |
8862 | } | |
8863 | ||
8864 | if (kvm_read_cr0(vcpu) & X86_CR0_CD) { | |
8865 | ipat = VMX_EPT_IPAT_BIT; | |
0da029ed | 8866 | if (kvm_check_has_quirk(vcpu->kvm, KVM_X86_QUIRK_CD_NW_CLEARED)) |
fb279950 XG |
8867 | cache = MTRR_TYPE_WRBACK; |
8868 | else | |
8869 | cache = MTRR_TYPE_UNCACHABLE; | |
b18d5431 XG |
8870 | goto exit; |
8871 | } | |
8872 | ||
ff53604b | 8873 | cache = kvm_mtrr_get_guest_memory_type(vcpu, gfn); |
b18d5431 XG |
8874 | |
8875 | exit: | |
8876 | return (cache << VMX_EPT_MT_EPTE_SHIFT) | ipat; | |
64d4d521 SY |
8877 | } |
8878 | ||
17cc3935 | 8879 | static int vmx_get_lpage_level(void) |
344f414f | 8880 | { |
878403b7 SY |
8881 | if (enable_ept && !cpu_has_vmx_ept_1g_page()) |
8882 | return PT_DIRECTORY_LEVEL; | |
8883 | else | |
8884 | /* For shadow and EPT supported 1GB page */ | |
8885 | return PT_PDPE_LEVEL; | |
344f414f JR |
8886 | } |
8887 | ||
feda805f XG |
8888 | static void vmcs_set_secondary_exec_control(u32 new_ctl) |
8889 | { | |
8890 | /* | |
8891 | * These bits in the secondary execution controls field | |
8892 | * are dynamic, the others are mostly based on the hypervisor | |
8893 | * architecture and the guest's CPUID. Do not touch the | |
8894 | * dynamic bits. | |
8895 | */ | |
8896 | u32 mask = | |
8897 | SECONDARY_EXEC_SHADOW_VMCS | | |
8898 | SECONDARY_EXEC_VIRTUALIZE_X2APIC_MODE | | |
8899 | SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES; | |
8900 | ||
8901 | u32 cur_ctl = vmcs_read32(SECONDARY_VM_EXEC_CONTROL); | |
8902 | ||
8903 | vmcs_write32(SECONDARY_VM_EXEC_CONTROL, | |
8904 | (new_ctl & ~mask) | (cur_ctl & mask)); | |
8905 | } | |
8906 | ||
0e851880 SY |
8907 | static void vmx_cpuid_update(struct kvm_vcpu *vcpu) |
8908 | { | |
4e47c7a6 SY |
8909 | struct kvm_cpuid_entry2 *best; |
8910 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
feda805f | 8911 | u32 secondary_exec_ctl = vmx_secondary_exec_control(vmx); |
4e47c7a6 | 8912 | |
4e47c7a6 | 8913 | if (vmx_rdtscp_supported()) { |
1cea0ce6 XG |
8914 | bool rdtscp_enabled = guest_cpuid_has_rdtscp(vcpu); |
8915 | if (!rdtscp_enabled) | |
feda805f | 8916 | secondary_exec_ctl &= ~SECONDARY_EXEC_RDTSCP; |
f36201e5 | 8917 | |
8b97265a | 8918 | if (nested) { |
1cea0ce6 | 8919 | if (rdtscp_enabled) |
8b97265a PB |
8920 | vmx->nested.nested_vmx_secondary_ctls_high |= |
8921 | SECONDARY_EXEC_RDTSCP; | |
8922 | else | |
8923 | vmx->nested.nested_vmx_secondary_ctls_high &= | |
8924 | ~SECONDARY_EXEC_RDTSCP; | |
8925 | } | |
4e47c7a6 | 8926 | } |
ad756a16 | 8927 | |
ad756a16 MJ |
8928 | /* Exposing INVPCID only when PCID is exposed */ |
8929 | best = kvm_find_cpuid_entry(vcpu, 0x7, 0); | |
8930 | if (vmx_invpcid_supported() && | |
29541bb8 XG |
8931 | (!best || !(best->ebx & bit(X86_FEATURE_INVPCID)) || |
8932 | !guest_cpuid_has_pcid(vcpu))) { | |
feda805f | 8933 | secondary_exec_ctl &= ~SECONDARY_EXEC_ENABLE_INVPCID; |
29541bb8 | 8934 | |
ad756a16 | 8935 | if (best) |
4f977045 | 8936 | best->ebx &= ~bit(X86_FEATURE_INVPCID); |
ad756a16 | 8937 | } |
8b3e34e4 | 8938 | |
feda805f XG |
8939 | vmcs_set_secondary_exec_control(secondary_exec_ctl); |
8940 | ||
8b3e34e4 XG |
8941 | if (static_cpu_has(X86_FEATURE_PCOMMIT) && nested) { |
8942 | if (guest_cpuid_has_pcommit(vcpu)) | |
8943 | vmx->nested.nested_vmx_secondary_ctls_high |= | |
8944 | SECONDARY_EXEC_PCOMMIT; | |
8945 | else | |
8946 | vmx->nested.nested_vmx_secondary_ctls_high &= | |
8947 | ~SECONDARY_EXEC_PCOMMIT; | |
8948 | } | |
0e851880 SY |
8949 | } |
8950 | ||
d4330ef2 JR |
8951 | static void vmx_set_supported_cpuid(u32 func, struct kvm_cpuid_entry2 *entry) |
8952 | { | |
7b8050f5 NHE |
8953 | if (func == 1 && nested) |
8954 | entry->ecx |= bit(X86_FEATURE_VMX); | |
d4330ef2 JR |
8955 | } |
8956 | ||
25d92081 YZ |
8957 | static void nested_ept_inject_page_fault(struct kvm_vcpu *vcpu, |
8958 | struct x86_exception *fault) | |
8959 | { | |
533558bc JK |
8960 | struct vmcs12 *vmcs12 = get_vmcs12(vcpu); |
8961 | u32 exit_reason; | |
25d92081 YZ |
8962 | |
8963 | if (fault->error_code & PFERR_RSVD_MASK) | |
533558bc | 8964 | exit_reason = EXIT_REASON_EPT_MISCONFIG; |
25d92081 | 8965 | else |
533558bc JK |
8966 | exit_reason = EXIT_REASON_EPT_VIOLATION; |
8967 | nested_vmx_vmexit(vcpu, exit_reason, 0, vcpu->arch.exit_qualification); | |
25d92081 YZ |
8968 | vmcs12->guest_physical_address = fault->address; |
8969 | } | |
8970 | ||
155a97a3 NHE |
8971 | /* Callbacks for nested_ept_init_mmu_context: */ |
8972 | ||
8973 | static unsigned long nested_ept_get_cr3(struct kvm_vcpu *vcpu) | |
8974 | { | |
8975 | /* return the page table to be shadowed - in our case, EPT12 */ | |
8976 | return get_vmcs12(vcpu)->ept_pointer; | |
8977 | } | |
8978 | ||
8a3c1a33 | 8979 | static void nested_ept_init_mmu_context(struct kvm_vcpu *vcpu) |
155a97a3 | 8980 | { |
ad896af0 PB |
8981 | WARN_ON(mmu_is_nested(vcpu)); |
8982 | kvm_init_shadow_ept_mmu(vcpu, | |
b9c237bb WV |
8983 | to_vmx(vcpu)->nested.nested_vmx_ept_caps & |
8984 | VMX_EPT_EXECUTE_ONLY_BIT); | |
155a97a3 NHE |
8985 | vcpu->arch.mmu.set_cr3 = vmx_set_cr3; |
8986 | vcpu->arch.mmu.get_cr3 = nested_ept_get_cr3; | |
8987 | vcpu->arch.mmu.inject_page_fault = nested_ept_inject_page_fault; | |
8988 | ||
8989 | vcpu->arch.walk_mmu = &vcpu->arch.nested_mmu; | |
155a97a3 NHE |
8990 | } |
8991 | ||
8992 | static void nested_ept_uninit_mmu_context(struct kvm_vcpu *vcpu) | |
8993 | { | |
8994 | vcpu->arch.walk_mmu = &vcpu->arch.mmu; | |
8995 | } | |
8996 | ||
19d5f10b EK |
8997 | static bool nested_vmx_is_page_fault_vmexit(struct vmcs12 *vmcs12, |
8998 | u16 error_code) | |
8999 | { | |
9000 | bool inequality, bit; | |
9001 | ||
9002 | bit = (vmcs12->exception_bitmap & (1u << PF_VECTOR)) != 0; | |
9003 | inequality = | |
9004 | (error_code & vmcs12->page_fault_error_code_mask) != | |
9005 | vmcs12->page_fault_error_code_match; | |
9006 | return inequality ^ bit; | |
9007 | } | |
9008 | ||
feaf0c7d GN |
9009 | static void vmx_inject_page_fault_nested(struct kvm_vcpu *vcpu, |
9010 | struct x86_exception *fault) | |
9011 | { | |
9012 | struct vmcs12 *vmcs12 = get_vmcs12(vcpu); | |
9013 | ||
9014 | WARN_ON(!is_guest_mode(vcpu)); | |
9015 | ||
19d5f10b | 9016 | if (nested_vmx_is_page_fault_vmexit(vmcs12, fault->error_code)) |
533558bc JK |
9017 | nested_vmx_vmexit(vcpu, to_vmx(vcpu)->exit_reason, |
9018 | vmcs_read32(VM_EXIT_INTR_INFO), | |
9019 | vmcs_readl(EXIT_QUALIFICATION)); | |
feaf0c7d GN |
9020 | else |
9021 | kvm_inject_page_fault(vcpu, fault); | |
9022 | } | |
9023 | ||
a2bcba50 WL |
9024 | static bool nested_get_vmcs12_pages(struct kvm_vcpu *vcpu, |
9025 | struct vmcs12 *vmcs12) | |
9026 | { | |
9027 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
9090422f | 9028 | int maxphyaddr = cpuid_maxphyaddr(vcpu); |
a2bcba50 WL |
9029 | |
9030 | if (nested_cpu_has2(vmcs12, SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES)) { | |
9090422f EK |
9031 | if (!PAGE_ALIGNED(vmcs12->apic_access_addr) || |
9032 | vmcs12->apic_access_addr >> maxphyaddr) | |
a2bcba50 WL |
9033 | return false; |
9034 | ||
9035 | /* | |
9036 | * Translate L1 physical address to host physical | |
9037 | * address for vmcs02. Keep the page pinned, so this | |
9038 | * physical address remains valid. We keep a reference | |
9039 | * to it so we can release it later. | |
9040 | */ | |
9041 | if (vmx->nested.apic_access_page) /* shouldn't happen */ | |
9042 | nested_release_page(vmx->nested.apic_access_page); | |
9043 | vmx->nested.apic_access_page = | |
9044 | nested_get_page(vcpu, vmcs12->apic_access_addr); | |
9045 | } | |
a7c0b07d WL |
9046 | |
9047 | if (nested_cpu_has(vmcs12, CPU_BASED_TPR_SHADOW)) { | |
9090422f EK |
9048 | if (!PAGE_ALIGNED(vmcs12->virtual_apic_page_addr) || |
9049 | vmcs12->virtual_apic_page_addr >> maxphyaddr) | |
a7c0b07d WL |
9050 | return false; |
9051 | ||
9052 | if (vmx->nested.virtual_apic_page) /* shouldn't happen */ | |
9053 | nested_release_page(vmx->nested.virtual_apic_page); | |
9054 | vmx->nested.virtual_apic_page = | |
9055 | nested_get_page(vcpu, vmcs12->virtual_apic_page_addr); | |
9056 | ||
9057 | /* | |
9058 | * Failing the vm entry is _not_ what the processor does | |
9059 | * but it's basically the only possibility we have. | |
9060 | * We could still enter the guest if CR8 load exits are | |
9061 | * enabled, CR8 store exits are enabled, and virtualize APIC | |
9062 | * access is disabled; in this case the processor would never | |
9063 | * use the TPR shadow and we could simply clear the bit from | |
9064 | * the execution control. But such a configuration is useless, | |
9065 | * so let's keep the code simple. | |
9066 | */ | |
9067 | if (!vmx->nested.virtual_apic_page) | |
9068 | return false; | |
9069 | } | |
9070 | ||
705699a1 | 9071 | if (nested_cpu_has_posted_intr(vmcs12)) { |
9090422f EK |
9072 | if (!IS_ALIGNED(vmcs12->posted_intr_desc_addr, 64) || |
9073 | vmcs12->posted_intr_desc_addr >> maxphyaddr) | |
705699a1 WV |
9074 | return false; |
9075 | ||
9076 | if (vmx->nested.pi_desc_page) { /* shouldn't happen */ | |
9077 | kunmap(vmx->nested.pi_desc_page); | |
9078 | nested_release_page(vmx->nested.pi_desc_page); | |
9079 | } | |
9080 | vmx->nested.pi_desc_page = | |
9081 | nested_get_page(vcpu, vmcs12->posted_intr_desc_addr); | |
9082 | if (!vmx->nested.pi_desc_page) | |
9083 | return false; | |
9084 | ||
9085 | vmx->nested.pi_desc = | |
9086 | (struct pi_desc *)kmap(vmx->nested.pi_desc_page); | |
9087 | if (!vmx->nested.pi_desc) { | |
9088 | nested_release_page_clean(vmx->nested.pi_desc_page); | |
9089 | return false; | |
9090 | } | |
9091 | vmx->nested.pi_desc = | |
9092 | (struct pi_desc *)((void *)vmx->nested.pi_desc + | |
9093 | (unsigned long)(vmcs12->posted_intr_desc_addr & | |
9094 | (PAGE_SIZE - 1))); | |
9095 | } | |
9096 | ||
a2bcba50 WL |
9097 | return true; |
9098 | } | |
9099 | ||
f4124500 JK |
9100 | static void vmx_start_preemption_timer(struct kvm_vcpu *vcpu) |
9101 | { | |
9102 | u64 preemption_timeout = get_vmcs12(vcpu)->vmx_preemption_timer_value; | |
9103 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
9104 | ||
9105 | if (vcpu->arch.virtual_tsc_khz == 0) | |
9106 | return; | |
9107 | ||
9108 | /* Make sure short timeouts reliably trigger an immediate vmexit. | |
9109 | * hrtimer_start does not guarantee this. */ | |
9110 | if (preemption_timeout <= 1) { | |
9111 | vmx_preemption_timer_fn(&vmx->nested.preemption_timer); | |
9112 | return; | |
9113 | } | |
9114 | ||
9115 | preemption_timeout <<= VMX_MISC_EMULATED_PREEMPTION_TIMER_RATE; | |
9116 | preemption_timeout *= 1000000; | |
9117 | do_div(preemption_timeout, vcpu->arch.virtual_tsc_khz); | |
9118 | hrtimer_start(&vmx->nested.preemption_timer, | |
9119 | ns_to_ktime(preemption_timeout), HRTIMER_MODE_REL); | |
9120 | } | |
9121 | ||
3af18d9c WV |
9122 | static int nested_vmx_check_msr_bitmap_controls(struct kvm_vcpu *vcpu, |
9123 | struct vmcs12 *vmcs12) | |
9124 | { | |
9125 | int maxphyaddr; | |
9126 | u64 addr; | |
9127 | ||
9128 | if (!nested_cpu_has(vmcs12, CPU_BASED_USE_MSR_BITMAPS)) | |
9129 | return 0; | |
9130 | ||
9131 | if (vmcs12_read_any(vcpu, MSR_BITMAP, &addr)) { | |
9132 | WARN_ON(1); | |
9133 | return -EINVAL; | |
9134 | } | |
9135 | maxphyaddr = cpuid_maxphyaddr(vcpu); | |
9136 | ||
9137 | if (!PAGE_ALIGNED(vmcs12->msr_bitmap) || | |
9138 | ((addr + PAGE_SIZE) >> maxphyaddr)) | |
9139 | return -EINVAL; | |
9140 | ||
9141 | return 0; | |
9142 | } | |
9143 | ||
9144 | /* | |
9145 | * Merge L0's and L1's MSR bitmap, return false to indicate that | |
9146 | * we do not use the hardware. | |
9147 | */ | |
9148 | static inline bool nested_vmx_merge_msr_bitmap(struct kvm_vcpu *vcpu, | |
9149 | struct vmcs12 *vmcs12) | |
9150 | { | |
82f0dd4b | 9151 | int msr; |
f2b93280 WV |
9152 | struct page *page; |
9153 | unsigned long *msr_bitmap; | |
9154 | ||
9155 | if (!nested_cpu_has_virt_x2apic_mode(vmcs12)) | |
9156 | return false; | |
9157 | ||
9158 | page = nested_get_page(vcpu, vmcs12->msr_bitmap); | |
9159 | if (!page) { | |
9160 | WARN_ON(1); | |
9161 | return false; | |
9162 | } | |
9163 | msr_bitmap = (unsigned long *)kmap(page); | |
9164 | if (!msr_bitmap) { | |
9165 | nested_release_page_clean(page); | |
9166 | WARN_ON(1); | |
9167 | return false; | |
9168 | } | |
9169 | ||
9170 | if (nested_cpu_has_virt_x2apic_mode(vmcs12)) { | |
82f0dd4b WV |
9171 | if (nested_cpu_has_apic_reg_virt(vmcs12)) |
9172 | for (msr = 0x800; msr <= 0x8ff; msr++) | |
9173 | nested_vmx_disable_intercept_for_msr( | |
9174 | msr_bitmap, | |
9175 | vmx_msr_bitmap_nested, | |
9176 | msr, MSR_TYPE_R); | |
f2b93280 WV |
9177 | /* TPR is allowed */ |
9178 | nested_vmx_disable_intercept_for_msr(msr_bitmap, | |
9179 | vmx_msr_bitmap_nested, | |
9180 | APIC_BASE_MSR + (APIC_TASKPRI >> 4), | |
9181 | MSR_TYPE_R | MSR_TYPE_W); | |
608406e2 WV |
9182 | if (nested_cpu_has_vid(vmcs12)) { |
9183 | /* EOI and self-IPI are allowed */ | |
9184 | nested_vmx_disable_intercept_for_msr( | |
9185 | msr_bitmap, | |
9186 | vmx_msr_bitmap_nested, | |
9187 | APIC_BASE_MSR + (APIC_EOI >> 4), | |
9188 | MSR_TYPE_W); | |
9189 | nested_vmx_disable_intercept_for_msr( | |
9190 | msr_bitmap, | |
9191 | vmx_msr_bitmap_nested, | |
9192 | APIC_BASE_MSR + (APIC_SELF_IPI >> 4), | |
9193 | MSR_TYPE_W); | |
9194 | } | |
82f0dd4b WV |
9195 | } else { |
9196 | /* | |
9197 | * Enable reading intercept of all the x2apic | |
9198 | * MSRs. We should not rely on vmcs12 to do any | |
9199 | * optimizations here, it may have been modified | |
9200 | * by L1. | |
9201 | */ | |
9202 | for (msr = 0x800; msr <= 0x8ff; msr++) | |
9203 | __vmx_enable_intercept_for_msr( | |
9204 | vmx_msr_bitmap_nested, | |
9205 | msr, | |
9206 | MSR_TYPE_R); | |
9207 | ||
f2b93280 WV |
9208 | __vmx_enable_intercept_for_msr( |
9209 | vmx_msr_bitmap_nested, | |
9210 | APIC_BASE_MSR + (APIC_TASKPRI >> 4), | |
82f0dd4b | 9211 | MSR_TYPE_W); |
608406e2 WV |
9212 | __vmx_enable_intercept_for_msr( |
9213 | vmx_msr_bitmap_nested, | |
9214 | APIC_BASE_MSR + (APIC_EOI >> 4), | |
9215 | MSR_TYPE_W); | |
9216 | __vmx_enable_intercept_for_msr( | |
9217 | vmx_msr_bitmap_nested, | |
9218 | APIC_BASE_MSR + (APIC_SELF_IPI >> 4), | |
9219 | MSR_TYPE_W); | |
82f0dd4b | 9220 | } |
f2b93280 WV |
9221 | kunmap(page); |
9222 | nested_release_page_clean(page); | |
9223 | ||
9224 | return true; | |
9225 | } | |
9226 | ||
9227 | static int nested_vmx_check_apicv_controls(struct kvm_vcpu *vcpu, | |
9228 | struct vmcs12 *vmcs12) | |
9229 | { | |
82f0dd4b | 9230 | if (!nested_cpu_has_virt_x2apic_mode(vmcs12) && |
608406e2 | 9231 | !nested_cpu_has_apic_reg_virt(vmcs12) && |
705699a1 WV |
9232 | !nested_cpu_has_vid(vmcs12) && |
9233 | !nested_cpu_has_posted_intr(vmcs12)) | |
f2b93280 WV |
9234 | return 0; |
9235 | ||
9236 | /* | |
9237 | * If virtualize x2apic mode is enabled, | |
9238 | * virtualize apic access must be disabled. | |
9239 | */ | |
82f0dd4b WV |
9240 | if (nested_cpu_has_virt_x2apic_mode(vmcs12) && |
9241 | nested_cpu_has2(vmcs12, SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES)) | |
f2b93280 WV |
9242 | return -EINVAL; |
9243 | ||
608406e2 WV |
9244 | /* |
9245 | * If virtual interrupt delivery is enabled, | |
9246 | * we must exit on external interrupts. | |
9247 | */ | |
9248 | if (nested_cpu_has_vid(vmcs12) && | |
9249 | !nested_exit_on_intr(vcpu)) | |
9250 | return -EINVAL; | |
9251 | ||
705699a1 WV |
9252 | /* |
9253 | * bits 15:8 should be zero in posted_intr_nv, | |
9254 | * the descriptor address has been already checked | |
9255 | * in nested_get_vmcs12_pages. | |
9256 | */ | |
9257 | if (nested_cpu_has_posted_intr(vmcs12) && | |
9258 | (!nested_cpu_has_vid(vmcs12) || | |
9259 | !nested_exit_intr_ack_set(vcpu) || | |
9260 | vmcs12->posted_intr_nv & 0xff00)) | |
9261 | return -EINVAL; | |
9262 | ||
f2b93280 WV |
9263 | /* tpr shadow is needed by all apicv features. */ |
9264 | if (!nested_cpu_has(vmcs12, CPU_BASED_TPR_SHADOW)) | |
9265 | return -EINVAL; | |
9266 | ||
9267 | return 0; | |
3af18d9c WV |
9268 | } |
9269 | ||
e9ac033e EK |
9270 | static int nested_vmx_check_msr_switch(struct kvm_vcpu *vcpu, |
9271 | unsigned long count_field, | |
92d71bc6 | 9272 | unsigned long addr_field) |
ff651cb6 | 9273 | { |
92d71bc6 | 9274 | int maxphyaddr; |
e9ac033e EK |
9275 | u64 count, addr; |
9276 | ||
9277 | if (vmcs12_read_any(vcpu, count_field, &count) || | |
9278 | vmcs12_read_any(vcpu, addr_field, &addr)) { | |
9279 | WARN_ON(1); | |
9280 | return -EINVAL; | |
9281 | } | |
9282 | if (count == 0) | |
9283 | return 0; | |
92d71bc6 | 9284 | maxphyaddr = cpuid_maxphyaddr(vcpu); |
e9ac033e EK |
9285 | if (!IS_ALIGNED(addr, 16) || addr >> maxphyaddr || |
9286 | (addr + count * sizeof(struct vmx_msr_entry) - 1) >> maxphyaddr) { | |
9287 | pr_warn_ratelimited( | |
9288 | "nVMX: invalid MSR switch (0x%lx, %d, %llu, 0x%08llx)", | |
9289 | addr_field, maxphyaddr, count, addr); | |
9290 | return -EINVAL; | |
9291 | } | |
9292 | return 0; | |
9293 | } | |
9294 | ||
9295 | static int nested_vmx_check_msr_switch_controls(struct kvm_vcpu *vcpu, | |
9296 | struct vmcs12 *vmcs12) | |
9297 | { | |
e9ac033e EK |
9298 | if (vmcs12->vm_exit_msr_load_count == 0 && |
9299 | vmcs12->vm_exit_msr_store_count == 0 && | |
9300 | vmcs12->vm_entry_msr_load_count == 0) | |
9301 | return 0; /* Fast path */ | |
e9ac033e | 9302 | if (nested_vmx_check_msr_switch(vcpu, VM_EXIT_MSR_LOAD_COUNT, |
92d71bc6 | 9303 | VM_EXIT_MSR_LOAD_ADDR) || |
e9ac033e | 9304 | nested_vmx_check_msr_switch(vcpu, VM_EXIT_MSR_STORE_COUNT, |
92d71bc6 | 9305 | VM_EXIT_MSR_STORE_ADDR) || |
e9ac033e | 9306 | nested_vmx_check_msr_switch(vcpu, VM_ENTRY_MSR_LOAD_COUNT, |
92d71bc6 | 9307 | VM_ENTRY_MSR_LOAD_ADDR)) |
e9ac033e EK |
9308 | return -EINVAL; |
9309 | return 0; | |
9310 | } | |
9311 | ||
9312 | static int nested_vmx_msr_check_common(struct kvm_vcpu *vcpu, | |
9313 | struct vmx_msr_entry *e) | |
9314 | { | |
9315 | /* x2APIC MSR accesses are not allowed */ | |
8a9781f7 | 9316 | if (vcpu->arch.apic_base & X2APIC_ENABLE && e->index >> 8 == 0x8) |
e9ac033e EK |
9317 | return -EINVAL; |
9318 | if (e->index == MSR_IA32_UCODE_WRITE || /* SDM Table 35-2 */ | |
9319 | e->index == MSR_IA32_UCODE_REV) | |
9320 | return -EINVAL; | |
9321 | if (e->reserved != 0) | |
ff651cb6 WV |
9322 | return -EINVAL; |
9323 | return 0; | |
9324 | } | |
9325 | ||
e9ac033e EK |
9326 | static int nested_vmx_load_msr_check(struct kvm_vcpu *vcpu, |
9327 | struct vmx_msr_entry *e) | |
ff651cb6 WV |
9328 | { |
9329 | if (e->index == MSR_FS_BASE || | |
9330 | e->index == MSR_GS_BASE || | |
e9ac033e EK |
9331 | e->index == MSR_IA32_SMM_MONITOR_CTL || /* SMM is not supported */ |
9332 | nested_vmx_msr_check_common(vcpu, e)) | |
9333 | return -EINVAL; | |
9334 | return 0; | |
9335 | } | |
9336 | ||
9337 | static int nested_vmx_store_msr_check(struct kvm_vcpu *vcpu, | |
9338 | struct vmx_msr_entry *e) | |
9339 | { | |
9340 | if (e->index == MSR_IA32_SMBASE || /* SMM is not supported */ | |
9341 | nested_vmx_msr_check_common(vcpu, e)) | |
ff651cb6 WV |
9342 | return -EINVAL; |
9343 | return 0; | |
9344 | } | |
9345 | ||
9346 | /* | |
9347 | * Load guest's/host's msr at nested entry/exit. | |
9348 | * return 0 for success, entry index for failure. | |
9349 | */ | |
9350 | static u32 nested_vmx_load_msr(struct kvm_vcpu *vcpu, u64 gpa, u32 count) | |
9351 | { | |
9352 | u32 i; | |
9353 | struct vmx_msr_entry e; | |
9354 | struct msr_data msr; | |
9355 | ||
9356 | msr.host_initiated = false; | |
9357 | for (i = 0; i < count; i++) { | |
54bf36aa PB |
9358 | if (kvm_vcpu_read_guest(vcpu, gpa + i * sizeof(e), |
9359 | &e, sizeof(e))) { | |
e9ac033e EK |
9360 | pr_warn_ratelimited( |
9361 | "%s cannot read MSR entry (%u, 0x%08llx)\n", | |
9362 | __func__, i, gpa + i * sizeof(e)); | |
ff651cb6 | 9363 | goto fail; |
e9ac033e EK |
9364 | } |
9365 | if (nested_vmx_load_msr_check(vcpu, &e)) { | |
9366 | pr_warn_ratelimited( | |
9367 | "%s check failed (%u, 0x%x, 0x%x)\n", | |
9368 | __func__, i, e.index, e.reserved); | |
9369 | goto fail; | |
9370 | } | |
ff651cb6 WV |
9371 | msr.index = e.index; |
9372 | msr.data = e.value; | |
e9ac033e EK |
9373 | if (kvm_set_msr(vcpu, &msr)) { |
9374 | pr_warn_ratelimited( | |
9375 | "%s cannot write MSR (%u, 0x%x, 0x%llx)\n", | |
9376 | __func__, i, e.index, e.value); | |
ff651cb6 | 9377 | goto fail; |
e9ac033e | 9378 | } |
ff651cb6 WV |
9379 | } |
9380 | return 0; | |
9381 | fail: | |
9382 | return i + 1; | |
9383 | } | |
9384 | ||
9385 | static int nested_vmx_store_msr(struct kvm_vcpu *vcpu, u64 gpa, u32 count) | |
9386 | { | |
9387 | u32 i; | |
9388 | struct vmx_msr_entry e; | |
9389 | ||
9390 | for (i = 0; i < count; i++) { | |
609e36d3 | 9391 | struct msr_data msr_info; |
54bf36aa PB |
9392 | if (kvm_vcpu_read_guest(vcpu, |
9393 | gpa + i * sizeof(e), | |
9394 | &e, 2 * sizeof(u32))) { | |
e9ac033e EK |
9395 | pr_warn_ratelimited( |
9396 | "%s cannot read MSR entry (%u, 0x%08llx)\n", | |
9397 | __func__, i, gpa + i * sizeof(e)); | |
ff651cb6 | 9398 | return -EINVAL; |
e9ac033e EK |
9399 | } |
9400 | if (nested_vmx_store_msr_check(vcpu, &e)) { | |
9401 | pr_warn_ratelimited( | |
9402 | "%s check failed (%u, 0x%x, 0x%x)\n", | |
9403 | __func__, i, e.index, e.reserved); | |
ff651cb6 | 9404 | return -EINVAL; |
e9ac033e | 9405 | } |
609e36d3 PB |
9406 | msr_info.host_initiated = false; |
9407 | msr_info.index = e.index; | |
9408 | if (kvm_get_msr(vcpu, &msr_info)) { | |
e9ac033e EK |
9409 | pr_warn_ratelimited( |
9410 | "%s cannot read MSR (%u, 0x%x)\n", | |
9411 | __func__, i, e.index); | |
9412 | return -EINVAL; | |
9413 | } | |
54bf36aa PB |
9414 | if (kvm_vcpu_write_guest(vcpu, |
9415 | gpa + i * sizeof(e) + | |
9416 | offsetof(struct vmx_msr_entry, value), | |
9417 | &msr_info.data, sizeof(msr_info.data))) { | |
e9ac033e EK |
9418 | pr_warn_ratelimited( |
9419 | "%s cannot write MSR (%u, 0x%x, 0x%llx)\n", | |
609e36d3 | 9420 | __func__, i, e.index, msr_info.data); |
e9ac033e EK |
9421 | return -EINVAL; |
9422 | } | |
ff651cb6 WV |
9423 | } |
9424 | return 0; | |
9425 | } | |
9426 | ||
fe3ef05c NHE |
9427 | /* |
9428 | * prepare_vmcs02 is called when the L1 guest hypervisor runs its nested | |
9429 | * L2 guest. L1 has a vmcs for L2 (vmcs12), and this function "merges" it | |
b4619660 | 9430 | * with L0's requirements for its guest (a.k.a. vmcs01), so we can run the L2 |
fe3ef05c NHE |
9431 | * guest in a way that will both be appropriate to L1's requests, and our |
9432 | * needs. In addition to modifying the active vmcs (which is vmcs02), this | |
9433 | * function also has additional necessary side-effects, like setting various | |
9434 | * vcpu->arch fields. | |
9435 | */ | |
9436 | static void prepare_vmcs02(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12) | |
9437 | { | |
9438 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
9439 | u32 exec_control; | |
9440 | ||
9441 | vmcs_write16(GUEST_ES_SELECTOR, vmcs12->guest_es_selector); | |
9442 | vmcs_write16(GUEST_CS_SELECTOR, vmcs12->guest_cs_selector); | |
9443 | vmcs_write16(GUEST_SS_SELECTOR, vmcs12->guest_ss_selector); | |
9444 | vmcs_write16(GUEST_DS_SELECTOR, vmcs12->guest_ds_selector); | |
9445 | vmcs_write16(GUEST_FS_SELECTOR, vmcs12->guest_fs_selector); | |
9446 | vmcs_write16(GUEST_GS_SELECTOR, vmcs12->guest_gs_selector); | |
9447 | vmcs_write16(GUEST_LDTR_SELECTOR, vmcs12->guest_ldtr_selector); | |
9448 | vmcs_write16(GUEST_TR_SELECTOR, vmcs12->guest_tr_selector); | |
9449 | vmcs_write32(GUEST_ES_LIMIT, vmcs12->guest_es_limit); | |
9450 | vmcs_write32(GUEST_CS_LIMIT, vmcs12->guest_cs_limit); | |
9451 | vmcs_write32(GUEST_SS_LIMIT, vmcs12->guest_ss_limit); | |
9452 | vmcs_write32(GUEST_DS_LIMIT, vmcs12->guest_ds_limit); | |
9453 | vmcs_write32(GUEST_FS_LIMIT, vmcs12->guest_fs_limit); | |
9454 | vmcs_write32(GUEST_GS_LIMIT, vmcs12->guest_gs_limit); | |
9455 | vmcs_write32(GUEST_LDTR_LIMIT, vmcs12->guest_ldtr_limit); | |
9456 | vmcs_write32(GUEST_TR_LIMIT, vmcs12->guest_tr_limit); | |
9457 | vmcs_write32(GUEST_GDTR_LIMIT, vmcs12->guest_gdtr_limit); | |
9458 | vmcs_write32(GUEST_IDTR_LIMIT, vmcs12->guest_idtr_limit); | |
9459 | vmcs_write32(GUEST_ES_AR_BYTES, vmcs12->guest_es_ar_bytes); | |
9460 | vmcs_write32(GUEST_CS_AR_BYTES, vmcs12->guest_cs_ar_bytes); | |
9461 | vmcs_write32(GUEST_SS_AR_BYTES, vmcs12->guest_ss_ar_bytes); | |
9462 | vmcs_write32(GUEST_DS_AR_BYTES, vmcs12->guest_ds_ar_bytes); | |
9463 | vmcs_write32(GUEST_FS_AR_BYTES, vmcs12->guest_fs_ar_bytes); | |
9464 | vmcs_write32(GUEST_GS_AR_BYTES, vmcs12->guest_gs_ar_bytes); | |
9465 | vmcs_write32(GUEST_LDTR_AR_BYTES, vmcs12->guest_ldtr_ar_bytes); | |
9466 | vmcs_write32(GUEST_TR_AR_BYTES, vmcs12->guest_tr_ar_bytes); | |
9467 | vmcs_writel(GUEST_ES_BASE, vmcs12->guest_es_base); | |
9468 | vmcs_writel(GUEST_CS_BASE, vmcs12->guest_cs_base); | |
9469 | vmcs_writel(GUEST_SS_BASE, vmcs12->guest_ss_base); | |
9470 | vmcs_writel(GUEST_DS_BASE, vmcs12->guest_ds_base); | |
9471 | vmcs_writel(GUEST_FS_BASE, vmcs12->guest_fs_base); | |
9472 | vmcs_writel(GUEST_GS_BASE, vmcs12->guest_gs_base); | |
9473 | vmcs_writel(GUEST_LDTR_BASE, vmcs12->guest_ldtr_base); | |
9474 | vmcs_writel(GUEST_TR_BASE, vmcs12->guest_tr_base); | |
9475 | vmcs_writel(GUEST_GDTR_BASE, vmcs12->guest_gdtr_base); | |
9476 | vmcs_writel(GUEST_IDTR_BASE, vmcs12->guest_idtr_base); | |
9477 | ||
2996fca0 JK |
9478 | if (vmcs12->vm_entry_controls & VM_ENTRY_LOAD_DEBUG_CONTROLS) { |
9479 | kvm_set_dr(vcpu, 7, vmcs12->guest_dr7); | |
9480 | vmcs_write64(GUEST_IA32_DEBUGCTL, vmcs12->guest_ia32_debugctl); | |
9481 | } else { | |
9482 | kvm_set_dr(vcpu, 7, vcpu->arch.dr7); | |
9483 | vmcs_write64(GUEST_IA32_DEBUGCTL, vmx->nested.vmcs01_debugctl); | |
9484 | } | |
fe3ef05c NHE |
9485 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, |
9486 | vmcs12->vm_entry_intr_info_field); | |
9487 | vmcs_write32(VM_ENTRY_EXCEPTION_ERROR_CODE, | |
9488 | vmcs12->vm_entry_exception_error_code); | |
9489 | vmcs_write32(VM_ENTRY_INSTRUCTION_LEN, | |
9490 | vmcs12->vm_entry_instruction_len); | |
9491 | vmcs_write32(GUEST_INTERRUPTIBILITY_INFO, | |
9492 | vmcs12->guest_interruptibility_info); | |
fe3ef05c | 9493 | vmcs_write32(GUEST_SYSENTER_CS, vmcs12->guest_sysenter_cs); |
63fbf59f | 9494 | vmx_set_rflags(vcpu, vmcs12->guest_rflags); |
fe3ef05c NHE |
9495 | vmcs_writel(GUEST_PENDING_DBG_EXCEPTIONS, |
9496 | vmcs12->guest_pending_dbg_exceptions); | |
9497 | vmcs_writel(GUEST_SYSENTER_ESP, vmcs12->guest_sysenter_esp); | |
9498 | vmcs_writel(GUEST_SYSENTER_EIP, vmcs12->guest_sysenter_eip); | |
9499 | ||
81dc01f7 WL |
9500 | if (nested_cpu_has_xsaves(vmcs12)) |
9501 | vmcs_write64(XSS_EXIT_BITMAP, vmcs12->xss_exit_bitmap); | |
fe3ef05c NHE |
9502 | vmcs_write64(VMCS_LINK_POINTER, -1ull); |
9503 | ||
f4124500 JK |
9504 | exec_control = vmcs12->pin_based_vm_exec_control; |
9505 | exec_control |= vmcs_config.pin_based_exec_ctrl; | |
705699a1 WV |
9506 | exec_control &= ~PIN_BASED_VMX_PREEMPTION_TIMER; |
9507 | ||
9508 | if (nested_cpu_has_posted_intr(vmcs12)) { | |
9509 | /* | |
9510 | * Note that we use L0's vector here and in | |
9511 | * vmx_deliver_nested_posted_interrupt. | |
9512 | */ | |
9513 | vmx->nested.posted_intr_nv = vmcs12->posted_intr_nv; | |
9514 | vmx->nested.pi_pending = false; | |
9515 | vmcs_write64(POSTED_INTR_NV, POSTED_INTR_VECTOR); | |
9516 | vmcs_write64(POSTED_INTR_DESC_ADDR, | |
9517 | page_to_phys(vmx->nested.pi_desc_page) + | |
9518 | (unsigned long)(vmcs12->posted_intr_desc_addr & | |
9519 | (PAGE_SIZE - 1))); | |
9520 | } else | |
9521 | exec_control &= ~PIN_BASED_POSTED_INTR; | |
9522 | ||
f4124500 | 9523 | vmcs_write32(PIN_BASED_VM_EXEC_CONTROL, exec_control); |
fe3ef05c | 9524 | |
f4124500 JK |
9525 | vmx->nested.preemption_timer_expired = false; |
9526 | if (nested_cpu_has_preemption_timer(vmcs12)) | |
9527 | vmx_start_preemption_timer(vcpu); | |
0238ea91 | 9528 | |
fe3ef05c NHE |
9529 | /* |
9530 | * Whether page-faults are trapped is determined by a combination of | |
9531 | * 3 settings: PFEC_MASK, PFEC_MATCH and EXCEPTION_BITMAP.PF. | |
9532 | * If enable_ept, L0 doesn't care about page faults and we should | |
9533 | * set all of these to L1's desires. However, if !enable_ept, L0 does | |
9534 | * care about (at least some) page faults, and because it is not easy | |
9535 | * (if at all possible?) to merge L0 and L1's desires, we simply ask | |
9536 | * to exit on each and every L2 page fault. This is done by setting | |
9537 | * MASK=MATCH=0 and (see below) EB.PF=1. | |
9538 | * Note that below we don't need special code to set EB.PF beyond the | |
9539 | * "or"ing of the EB of vmcs01 and vmcs12, because when enable_ept, | |
9540 | * vmcs01's EB.PF is 0 so the "or" will take vmcs12's value, and when | |
9541 | * !enable_ept, EB.PF is 1, so the "or" will always be 1. | |
9542 | * | |
9543 | * A problem with this approach (when !enable_ept) is that L1 may be | |
9544 | * injected with more page faults than it asked for. This could have | |
9545 | * caused problems, but in practice existing hypervisors don't care. | |
9546 | * To fix this, we will need to emulate the PFEC checking (on the L1 | |
9547 | * page tables), using walk_addr(), when injecting PFs to L1. | |
9548 | */ | |
9549 | vmcs_write32(PAGE_FAULT_ERROR_CODE_MASK, | |
9550 | enable_ept ? vmcs12->page_fault_error_code_mask : 0); | |
9551 | vmcs_write32(PAGE_FAULT_ERROR_CODE_MATCH, | |
9552 | enable_ept ? vmcs12->page_fault_error_code_match : 0); | |
9553 | ||
9554 | if (cpu_has_secondary_exec_ctrls()) { | |
f4124500 | 9555 | exec_control = vmx_secondary_exec_control(vmx); |
e2821620 | 9556 | |
fe3ef05c | 9557 | /* Take the following fields only from vmcs12 */ |
696dfd95 | 9558 | exec_control &= ~(SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES | |
b3a2a907 | 9559 | SECONDARY_EXEC_RDTSCP | |
696dfd95 | 9560 | SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY | |
8b3e34e4 XG |
9561 | SECONDARY_EXEC_APIC_REGISTER_VIRT | |
9562 | SECONDARY_EXEC_PCOMMIT); | |
fe3ef05c NHE |
9563 | if (nested_cpu_has(vmcs12, |
9564 | CPU_BASED_ACTIVATE_SECONDARY_CONTROLS)) | |
9565 | exec_control |= vmcs12->secondary_vm_exec_control; | |
9566 | ||
9567 | if (exec_control & SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES) { | |
fe3ef05c NHE |
9568 | /* |
9569 | * If translation failed, no matter: This feature asks | |
9570 | * to exit when accessing the given address, and if it | |
9571 | * can never be accessed, this feature won't do | |
9572 | * anything anyway. | |
9573 | */ | |
9574 | if (!vmx->nested.apic_access_page) | |
9575 | exec_control &= | |
9576 | ~SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES; | |
9577 | else | |
9578 | vmcs_write64(APIC_ACCESS_ADDR, | |
9579 | page_to_phys(vmx->nested.apic_access_page)); | |
f2b93280 | 9580 | } else if (!(nested_cpu_has_virt_x2apic_mode(vmcs12)) && |
35754c98 | 9581 | cpu_need_virtualize_apic_accesses(&vmx->vcpu)) { |
ca3f257a JK |
9582 | exec_control |= |
9583 | SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES; | |
38b99173 | 9584 | kvm_vcpu_reload_apic_access_page(vcpu); |
fe3ef05c NHE |
9585 | } |
9586 | ||
608406e2 WV |
9587 | if (exec_control & SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY) { |
9588 | vmcs_write64(EOI_EXIT_BITMAP0, | |
9589 | vmcs12->eoi_exit_bitmap0); | |
9590 | vmcs_write64(EOI_EXIT_BITMAP1, | |
9591 | vmcs12->eoi_exit_bitmap1); | |
9592 | vmcs_write64(EOI_EXIT_BITMAP2, | |
9593 | vmcs12->eoi_exit_bitmap2); | |
9594 | vmcs_write64(EOI_EXIT_BITMAP3, | |
9595 | vmcs12->eoi_exit_bitmap3); | |
9596 | vmcs_write16(GUEST_INTR_STATUS, | |
9597 | vmcs12->guest_intr_status); | |
9598 | } | |
9599 | ||
fe3ef05c NHE |
9600 | vmcs_write32(SECONDARY_VM_EXEC_CONTROL, exec_control); |
9601 | } | |
9602 | ||
9603 | ||
9604 | /* | |
9605 | * Set host-state according to L0's settings (vmcs12 is irrelevant here) | |
9606 | * Some constant fields are set here by vmx_set_constant_host_state(). | |
9607 | * Other fields are different per CPU, and will be set later when | |
9608 | * vmx_vcpu_load() is called, and when vmx_save_host_state() is called. | |
9609 | */ | |
a547c6db | 9610 | vmx_set_constant_host_state(vmx); |
fe3ef05c NHE |
9611 | |
9612 | /* | |
9613 | * HOST_RSP is normally set correctly in vmx_vcpu_run() just before | |
9614 | * entry, but only if the current (host) sp changed from the value | |
9615 | * we wrote last (vmx->host_rsp). This cache is no longer relevant | |
9616 | * if we switch vmcs, and rather than hold a separate cache per vmcs, | |
9617 | * here we just force the write to happen on entry. | |
9618 | */ | |
9619 | vmx->host_rsp = 0; | |
9620 | ||
9621 | exec_control = vmx_exec_control(vmx); /* L0's desires */ | |
9622 | exec_control &= ~CPU_BASED_VIRTUAL_INTR_PENDING; | |
9623 | exec_control &= ~CPU_BASED_VIRTUAL_NMI_PENDING; | |
9624 | exec_control &= ~CPU_BASED_TPR_SHADOW; | |
9625 | exec_control |= vmcs12->cpu_based_vm_exec_control; | |
a7c0b07d WL |
9626 | |
9627 | if (exec_control & CPU_BASED_TPR_SHADOW) { | |
9628 | vmcs_write64(VIRTUAL_APIC_PAGE_ADDR, | |
9629 | page_to_phys(vmx->nested.virtual_apic_page)); | |
9630 | vmcs_write32(TPR_THRESHOLD, vmcs12->tpr_threshold); | |
9631 | } | |
9632 | ||
3af18d9c | 9633 | if (cpu_has_vmx_msr_bitmap() && |
670125bd WV |
9634 | exec_control & CPU_BASED_USE_MSR_BITMAPS) { |
9635 | nested_vmx_merge_msr_bitmap(vcpu, vmcs12); | |
9636 | /* MSR_BITMAP will be set by following vmx_set_efer. */ | |
3af18d9c WV |
9637 | } else |
9638 | exec_control &= ~CPU_BASED_USE_MSR_BITMAPS; | |
9639 | ||
fe3ef05c | 9640 | /* |
3af18d9c | 9641 | * Merging of IO bitmap not currently supported. |
fe3ef05c NHE |
9642 | * Rather, exit every time. |
9643 | */ | |
fe3ef05c NHE |
9644 | exec_control &= ~CPU_BASED_USE_IO_BITMAPS; |
9645 | exec_control |= CPU_BASED_UNCOND_IO_EXITING; | |
9646 | ||
9647 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, exec_control); | |
9648 | ||
9649 | /* EXCEPTION_BITMAP and CR0_GUEST_HOST_MASK should basically be the | |
9650 | * bitwise-or of what L1 wants to trap for L2, and what we want to | |
9651 | * trap. Note that CR0.TS also needs updating - we do this later. | |
9652 | */ | |
9653 | update_exception_bitmap(vcpu); | |
9654 | vcpu->arch.cr0_guest_owned_bits &= ~vmcs12->cr0_guest_host_mask; | |
9655 | vmcs_writel(CR0_GUEST_HOST_MASK, ~vcpu->arch.cr0_guest_owned_bits); | |
9656 | ||
8049d651 NHE |
9657 | /* L2->L1 exit controls are emulated - the hardware exit is to L0 so |
9658 | * we should use its exit controls. Note that VM_EXIT_LOAD_IA32_EFER | |
9659 | * bits are further modified by vmx_set_efer() below. | |
9660 | */ | |
f4124500 | 9661 | vmcs_write32(VM_EXIT_CONTROLS, vmcs_config.vmexit_ctrl); |
8049d651 NHE |
9662 | |
9663 | /* vmcs12's VM_ENTRY_LOAD_IA32_EFER and VM_ENTRY_IA32E_MODE are | |
9664 | * emulated by vmx_set_efer(), below. | |
9665 | */ | |
2961e876 | 9666 | vm_entry_controls_init(vmx, |
8049d651 NHE |
9667 | (vmcs12->vm_entry_controls & ~VM_ENTRY_LOAD_IA32_EFER & |
9668 | ~VM_ENTRY_IA32E_MODE) | | |
fe3ef05c NHE |
9669 | (vmcs_config.vmentry_ctrl & ~VM_ENTRY_IA32E_MODE)); |
9670 | ||
44811c02 | 9671 | if (vmcs12->vm_entry_controls & VM_ENTRY_LOAD_IA32_PAT) { |
fe3ef05c | 9672 | vmcs_write64(GUEST_IA32_PAT, vmcs12->guest_ia32_pat); |
44811c02 JK |
9673 | vcpu->arch.pat = vmcs12->guest_ia32_pat; |
9674 | } else if (vmcs_config.vmentry_ctrl & VM_ENTRY_LOAD_IA32_PAT) | |
fe3ef05c NHE |
9675 | vmcs_write64(GUEST_IA32_PAT, vmx->vcpu.arch.pat); |
9676 | ||
9677 | ||
9678 | set_cr4_guest_host_mask(vmx); | |
9679 | ||
36be0b9d PB |
9680 | if (vmcs12->vm_entry_controls & VM_ENTRY_LOAD_BNDCFGS) |
9681 | vmcs_write64(GUEST_BNDCFGS, vmcs12->guest_bndcfgs); | |
9682 | ||
27fc51b2 NHE |
9683 | if (vmcs12->cpu_based_vm_exec_control & CPU_BASED_USE_TSC_OFFSETING) |
9684 | vmcs_write64(TSC_OFFSET, | |
9685 | vmx->nested.vmcs01_tsc_offset + vmcs12->tsc_offset); | |
9686 | else | |
9687 | vmcs_write64(TSC_OFFSET, vmx->nested.vmcs01_tsc_offset); | |
fe3ef05c NHE |
9688 | |
9689 | if (enable_vpid) { | |
9690 | /* | |
5c614b35 WL |
9691 | * There is no direct mapping between vpid02 and vpid12, the |
9692 | * vpid02 is per-vCPU for L0 and reused while the value of | |
9693 | * vpid12 is changed w/ one invvpid during nested vmentry. | |
9694 | * The vpid12 is allocated by L1 for L2, so it will not | |
9695 | * influence global bitmap(for vpid01 and vpid02 allocation) | |
9696 | * even if spawn a lot of nested vCPUs. | |
fe3ef05c | 9697 | */ |
5c614b35 WL |
9698 | if (nested_cpu_has_vpid(vmcs12) && vmx->nested.vpid02) { |
9699 | vmcs_write16(VIRTUAL_PROCESSOR_ID, vmx->nested.vpid02); | |
9700 | if (vmcs12->virtual_processor_id != vmx->nested.last_vpid) { | |
9701 | vmx->nested.last_vpid = vmcs12->virtual_processor_id; | |
9702 | __vmx_flush_tlb(vcpu, to_vmx(vcpu)->nested.vpid02); | |
9703 | } | |
9704 | } else { | |
9705 | vmcs_write16(VIRTUAL_PROCESSOR_ID, vmx->vpid); | |
9706 | vmx_flush_tlb(vcpu); | |
9707 | } | |
9708 | ||
fe3ef05c NHE |
9709 | } |
9710 | ||
155a97a3 NHE |
9711 | if (nested_cpu_has_ept(vmcs12)) { |
9712 | kvm_mmu_unload(vcpu); | |
9713 | nested_ept_init_mmu_context(vcpu); | |
9714 | } | |
9715 | ||
fe3ef05c NHE |
9716 | if (vmcs12->vm_entry_controls & VM_ENTRY_LOAD_IA32_EFER) |
9717 | vcpu->arch.efer = vmcs12->guest_ia32_efer; | |
d1fa0352 | 9718 | else if (vmcs12->vm_entry_controls & VM_ENTRY_IA32E_MODE) |
fe3ef05c NHE |
9719 | vcpu->arch.efer |= (EFER_LMA | EFER_LME); |
9720 | else | |
9721 | vcpu->arch.efer &= ~(EFER_LMA | EFER_LME); | |
9722 | /* Note: modifies VM_ENTRY/EXIT_CONTROLS and GUEST/HOST_IA32_EFER */ | |
9723 | vmx_set_efer(vcpu, vcpu->arch.efer); | |
9724 | ||
9725 | /* | |
9726 | * This sets GUEST_CR0 to vmcs12->guest_cr0, with possibly a modified | |
9727 | * TS bit (for lazy fpu) and bits which we consider mandatory enabled. | |
9728 | * The CR0_READ_SHADOW is what L2 should have expected to read given | |
9729 | * the specifications by L1; It's not enough to take | |
9730 | * vmcs12->cr0_read_shadow because on our cr0_guest_host_mask we we | |
9731 | * have more bits than L1 expected. | |
9732 | */ | |
9733 | vmx_set_cr0(vcpu, vmcs12->guest_cr0); | |
9734 | vmcs_writel(CR0_READ_SHADOW, nested_read_cr0(vmcs12)); | |
9735 | ||
9736 | vmx_set_cr4(vcpu, vmcs12->guest_cr4); | |
9737 | vmcs_writel(CR4_READ_SHADOW, nested_read_cr4(vmcs12)); | |
9738 | ||
9739 | /* shadow page tables on either EPT or shadow page tables */ | |
9740 | kvm_set_cr3(vcpu, vmcs12->guest_cr3); | |
9741 | kvm_mmu_reset_context(vcpu); | |
9742 | ||
feaf0c7d GN |
9743 | if (!enable_ept) |
9744 | vcpu->arch.walk_mmu->inject_page_fault = vmx_inject_page_fault_nested; | |
9745 | ||
3633cfc3 NHE |
9746 | /* |
9747 | * L1 may access the L2's PDPTR, so save them to construct vmcs12 | |
9748 | */ | |
9749 | if (enable_ept) { | |
9750 | vmcs_write64(GUEST_PDPTR0, vmcs12->guest_pdptr0); | |
9751 | vmcs_write64(GUEST_PDPTR1, vmcs12->guest_pdptr1); | |
9752 | vmcs_write64(GUEST_PDPTR2, vmcs12->guest_pdptr2); | |
9753 | vmcs_write64(GUEST_PDPTR3, vmcs12->guest_pdptr3); | |
9754 | } | |
9755 | ||
fe3ef05c NHE |
9756 | kvm_register_write(vcpu, VCPU_REGS_RSP, vmcs12->guest_rsp); |
9757 | kvm_register_write(vcpu, VCPU_REGS_RIP, vmcs12->guest_rip); | |
9758 | } | |
9759 | ||
cd232ad0 NHE |
9760 | /* |
9761 | * nested_vmx_run() handles a nested entry, i.e., a VMLAUNCH or VMRESUME on L1 | |
9762 | * for running an L2 nested guest. | |
9763 | */ | |
9764 | static int nested_vmx_run(struct kvm_vcpu *vcpu, bool launch) | |
9765 | { | |
9766 | struct vmcs12 *vmcs12; | |
9767 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
9768 | int cpu; | |
9769 | struct loaded_vmcs *vmcs02; | |
384bb783 | 9770 | bool ia32e; |
ff651cb6 | 9771 | u32 msr_entry_idx; |
cd232ad0 NHE |
9772 | |
9773 | if (!nested_vmx_check_permission(vcpu) || | |
9774 | !nested_vmx_check_vmcs12(vcpu)) | |
9775 | return 1; | |
9776 | ||
9777 | skip_emulated_instruction(vcpu); | |
9778 | vmcs12 = get_vmcs12(vcpu); | |
9779 | ||
012f83cb AG |
9780 | if (enable_shadow_vmcs) |
9781 | copy_shadow_to_vmcs12(vmx); | |
9782 | ||
7c177938 NHE |
9783 | /* |
9784 | * The nested entry process starts with enforcing various prerequisites | |
9785 | * on vmcs12 as required by the Intel SDM, and act appropriately when | |
9786 | * they fail: As the SDM explains, some conditions should cause the | |
9787 | * instruction to fail, while others will cause the instruction to seem | |
9788 | * to succeed, but return an EXIT_REASON_INVALID_STATE. | |
9789 | * To speed up the normal (success) code path, we should avoid checking | |
9790 | * for misconfigurations which will anyway be caught by the processor | |
9791 | * when using the merged vmcs02. | |
9792 | */ | |
9793 | if (vmcs12->launch_state == launch) { | |
9794 | nested_vmx_failValid(vcpu, | |
9795 | launch ? VMXERR_VMLAUNCH_NONCLEAR_VMCS | |
9796 | : VMXERR_VMRESUME_NONLAUNCHED_VMCS); | |
9797 | return 1; | |
9798 | } | |
9799 | ||
6dfacadd JK |
9800 | if (vmcs12->guest_activity_state != GUEST_ACTIVITY_ACTIVE && |
9801 | vmcs12->guest_activity_state != GUEST_ACTIVITY_HLT) { | |
26539bd0 PB |
9802 | nested_vmx_failValid(vcpu, VMXERR_ENTRY_INVALID_CONTROL_FIELD); |
9803 | return 1; | |
9804 | } | |
9805 | ||
3af18d9c | 9806 | if (!nested_get_vmcs12_pages(vcpu, vmcs12)) { |
7c177938 NHE |
9807 | nested_vmx_failValid(vcpu, VMXERR_ENTRY_INVALID_CONTROL_FIELD); |
9808 | return 1; | |
9809 | } | |
9810 | ||
3af18d9c | 9811 | if (nested_vmx_check_msr_bitmap_controls(vcpu, vmcs12)) { |
7c177938 NHE |
9812 | nested_vmx_failValid(vcpu, VMXERR_ENTRY_INVALID_CONTROL_FIELD); |
9813 | return 1; | |
9814 | } | |
9815 | ||
f2b93280 WV |
9816 | if (nested_vmx_check_apicv_controls(vcpu, vmcs12)) { |
9817 | nested_vmx_failValid(vcpu, VMXERR_ENTRY_INVALID_CONTROL_FIELD); | |
9818 | return 1; | |
9819 | } | |
9820 | ||
e9ac033e EK |
9821 | if (nested_vmx_check_msr_switch_controls(vcpu, vmcs12)) { |
9822 | nested_vmx_failValid(vcpu, VMXERR_ENTRY_INVALID_CONTROL_FIELD); | |
9823 | return 1; | |
9824 | } | |
9825 | ||
7c177938 | 9826 | if (!vmx_control_verify(vmcs12->cpu_based_vm_exec_control, |
b9c237bb WV |
9827 | vmx->nested.nested_vmx_true_procbased_ctls_low, |
9828 | vmx->nested.nested_vmx_procbased_ctls_high) || | |
7c177938 | 9829 | !vmx_control_verify(vmcs12->secondary_vm_exec_control, |
b9c237bb WV |
9830 | vmx->nested.nested_vmx_secondary_ctls_low, |
9831 | vmx->nested.nested_vmx_secondary_ctls_high) || | |
7c177938 | 9832 | !vmx_control_verify(vmcs12->pin_based_vm_exec_control, |
b9c237bb WV |
9833 | vmx->nested.nested_vmx_pinbased_ctls_low, |
9834 | vmx->nested.nested_vmx_pinbased_ctls_high) || | |
7c177938 | 9835 | !vmx_control_verify(vmcs12->vm_exit_controls, |
b9c237bb WV |
9836 | vmx->nested.nested_vmx_true_exit_ctls_low, |
9837 | vmx->nested.nested_vmx_exit_ctls_high) || | |
7c177938 | 9838 | !vmx_control_verify(vmcs12->vm_entry_controls, |
b9c237bb WV |
9839 | vmx->nested.nested_vmx_true_entry_ctls_low, |
9840 | vmx->nested.nested_vmx_entry_ctls_high)) | |
7c177938 NHE |
9841 | { |
9842 | nested_vmx_failValid(vcpu, VMXERR_ENTRY_INVALID_CONTROL_FIELD); | |
9843 | return 1; | |
9844 | } | |
9845 | ||
9846 | if (((vmcs12->host_cr0 & VMXON_CR0_ALWAYSON) != VMXON_CR0_ALWAYSON) || | |
9847 | ((vmcs12->host_cr4 & VMXON_CR4_ALWAYSON) != VMXON_CR4_ALWAYSON)) { | |
9848 | nested_vmx_failValid(vcpu, | |
9849 | VMXERR_ENTRY_INVALID_HOST_STATE_FIELD); | |
9850 | return 1; | |
9851 | } | |
9852 | ||
b9c237bb | 9853 | if (!nested_cr0_valid(vcpu, vmcs12->guest_cr0) || |
7c177938 NHE |
9854 | ((vmcs12->guest_cr4 & VMXON_CR4_ALWAYSON) != VMXON_CR4_ALWAYSON)) { |
9855 | nested_vmx_entry_failure(vcpu, vmcs12, | |
9856 | EXIT_REASON_INVALID_STATE, ENTRY_FAIL_DEFAULT); | |
9857 | return 1; | |
9858 | } | |
9859 | if (vmcs12->vmcs_link_pointer != -1ull) { | |
9860 | nested_vmx_entry_failure(vcpu, vmcs12, | |
9861 | EXIT_REASON_INVALID_STATE, ENTRY_FAIL_VMCS_LINK_PTR); | |
9862 | return 1; | |
9863 | } | |
9864 | ||
384bb783 | 9865 | /* |
cb0c8cda | 9866 | * If the load IA32_EFER VM-entry control is 1, the following checks |
384bb783 JK |
9867 | * are performed on the field for the IA32_EFER MSR: |
9868 | * - Bits reserved in the IA32_EFER MSR must be 0. | |
9869 | * - Bit 10 (corresponding to IA32_EFER.LMA) must equal the value of | |
9870 | * the IA-32e mode guest VM-exit control. It must also be identical | |
9871 | * to bit 8 (LME) if bit 31 in the CR0 field (corresponding to | |
9872 | * CR0.PG) is 1. | |
9873 | */ | |
9874 | if (vmcs12->vm_entry_controls & VM_ENTRY_LOAD_IA32_EFER) { | |
9875 | ia32e = (vmcs12->vm_entry_controls & VM_ENTRY_IA32E_MODE) != 0; | |
9876 | if (!kvm_valid_efer(vcpu, vmcs12->guest_ia32_efer) || | |
9877 | ia32e != !!(vmcs12->guest_ia32_efer & EFER_LMA) || | |
9878 | ((vmcs12->guest_cr0 & X86_CR0_PG) && | |
9879 | ia32e != !!(vmcs12->guest_ia32_efer & EFER_LME))) { | |
9880 | nested_vmx_entry_failure(vcpu, vmcs12, | |
9881 | EXIT_REASON_INVALID_STATE, ENTRY_FAIL_DEFAULT); | |
9882 | return 1; | |
9883 | } | |
9884 | } | |
9885 | ||
9886 | /* | |
9887 | * If the load IA32_EFER VM-exit control is 1, bits reserved in the | |
9888 | * IA32_EFER MSR must be 0 in the field for that register. In addition, | |
9889 | * the values of the LMA and LME bits in the field must each be that of | |
9890 | * the host address-space size VM-exit control. | |
9891 | */ | |
9892 | if (vmcs12->vm_exit_controls & VM_EXIT_LOAD_IA32_EFER) { | |
9893 | ia32e = (vmcs12->vm_exit_controls & | |
9894 | VM_EXIT_HOST_ADDR_SPACE_SIZE) != 0; | |
9895 | if (!kvm_valid_efer(vcpu, vmcs12->host_ia32_efer) || | |
9896 | ia32e != !!(vmcs12->host_ia32_efer & EFER_LMA) || | |
9897 | ia32e != !!(vmcs12->host_ia32_efer & EFER_LME)) { | |
9898 | nested_vmx_entry_failure(vcpu, vmcs12, | |
9899 | EXIT_REASON_INVALID_STATE, ENTRY_FAIL_DEFAULT); | |
9900 | return 1; | |
9901 | } | |
9902 | } | |
9903 | ||
7c177938 NHE |
9904 | /* |
9905 | * We're finally done with prerequisite checking, and can start with | |
9906 | * the nested entry. | |
9907 | */ | |
9908 | ||
cd232ad0 NHE |
9909 | vmcs02 = nested_get_current_vmcs02(vmx); |
9910 | if (!vmcs02) | |
9911 | return -ENOMEM; | |
9912 | ||
9913 | enter_guest_mode(vcpu); | |
9914 | ||
9915 | vmx->nested.vmcs01_tsc_offset = vmcs_read64(TSC_OFFSET); | |
9916 | ||
2996fca0 JK |
9917 | if (!(vmcs12->vm_entry_controls & VM_ENTRY_LOAD_DEBUG_CONTROLS)) |
9918 | vmx->nested.vmcs01_debugctl = vmcs_read64(GUEST_IA32_DEBUGCTL); | |
9919 | ||
cd232ad0 NHE |
9920 | cpu = get_cpu(); |
9921 | vmx->loaded_vmcs = vmcs02; | |
9922 | vmx_vcpu_put(vcpu); | |
9923 | vmx_vcpu_load(vcpu, cpu); | |
9924 | vcpu->cpu = cpu; | |
9925 | put_cpu(); | |
9926 | ||
36c3cc42 JK |
9927 | vmx_segment_cache_clear(vmx); |
9928 | ||
cd232ad0 NHE |
9929 | prepare_vmcs02(vcpu, vmcs12); |
9930 | ||
ff651cb6 WV |
9931 | msr_entry_idx = nested_vmx_load_msr(vcpu, |
9932 | vmcs12->vm_entry_msr_load_addr, | |
9933 | vmcs12->vm_entry_msr_load_count); | |
9934 | if (msr_entry_idx) { | |
9935 | leave_guest_mode(vcpu); | |
9936 | vmx_load_vmcs01(vcpu); | |
9937 | nested_vmx_entry_failure(vcpu, vmcs12, | |
9938 | EXIT_REASON_MSR_LOAD_FAIL, msr_entry_idx); | |
9939 | return 1; | |
9940 | } | |
9941 | ||
9942 | vmcs12->launch_state = 1; | |
9943 | ||
6dfacadd | 9944 | if (vmcs12->guest_activity_state == GUEST_ACTIVITY_HLT) |
5cb56059 | 9945 | return kvm_vcpu_halt(vcpu); |
6dfacadd | 9946 | |
7af40ad3 JK |
9947 | vmx->nested.nested_run_pending = 1; |
9948 | ||
cd232ad0 NHE |
9949 | /* |
9950 | * Note no nested_vmx_succeed or nested_vmx_fail here. At this point | |
9951 | * we are no longer running L1, and VMLAUNCH/VMRESUME has not yet | |
9952 | * returned as far as L1 is concerned. It will only return (and set | |
9953 | * the success flag) when L2 exits (see nested_vmx_vmexit()). | |
9954 | */ | |
9955 | return 1; | |
9956 | } | |
9957 | ||
4704d0be NHE |
9958 | /* |
9959 | * On a nested exit from L2 to L1, vmcs12.guest_cr0 might not be up-to-date | |
9960 | * because L2 may have changed some cr0 bits directly (CRO_GUEST_HOST_MASK). | |
9961 | * This function returns the new value we should put in vmcs12.guest_cr0. | |
9962 | * It's not enough to just return the vmcs02 GUEST_CR0. Rather, | |
9963 | * 1. Bits that neither L0 nor L1 trapped, were set directly by L2 and are now | |
9964 | * available in vmcs02 GUEST_CR0. (Note: It's enough to check that L0 | |
9965 | * didn't trap the bit, because if L1 did, so would L0). | |
9966 | * 2. Bits that L1 asked to trap (and therefore L0 also did) could not have | |
9967 | * been modified by L2, and L1 knows it. So just leave the old value of | |
9968 | * the bit from vmcs12.guest_cr0. Note that the bit from vmcs02 GUEST_CR0 | |
9969 | * isn't relevant, because if L0 traps this bit it can set it to anything. | |
9970 | * 3. Bits that L1 didn't trap, but L0 did. L1 believes the guest could have | |
9971 | * changed these bits, and therefore they need to be updated, but L0 | |
9972 | * didn't necessarily allow them to be changed in GUEST_CR0 - and rather | |
9973 | * put them in vmcs02 CR0_READ_SHADOW. So take these bits from there. | |
9974 | */ | |
9975 | static inline unsigned long | |
9976 | vmcs12_guest_cr0(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12) | |
9977 | { | |
9978 | return | |
9979 | /*1*/ (vmcs_readl(GUEST_CR0) & vcpu->arch.cr0_guest_owned_bits) | | |
9980 | /*2*/ (vmcs12->guest_cr0 & vmcs12->cr0_guest_host_mask) | | |
9981 | /*3*/ (vmcs_readl(CR0_READ_SHADOW) & ~(vmcs12->cr0_guest_host_mask | | |
9982 | vcpu->arch.cr0_guest_owned_bits)); | |
9983 | } | |
9984 | ||
9985 | static inline unsigned long | |
9986 | vmcs12_guest_cr4(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12) | |
9987 | { | |
9988 | return | |
9989 | /*1*/ (vmcs_readl(GUEST_CR4) & vcpu->arch.cr4_guest_owned_bits) | | |
9990 | /*2*/ (vmcs12->guest_cr4 & vmcs12->cr4_guest_host_mask) | | |
9991 | /*3*/ (vmcs_readl(CR4_READ_SHADOW) & ~(vmcs12->cr4_guest_host_mask | | |
9992 | vcpu->arch.cr4_guest_owned_bits)); | |
9993 | } | |
9994 | ||
5f3d5799 JK |
9995 | static void vmcs12_save_pending_event(struct kvm_vcpu *vcpu, |
9996 | struct vmcs12 *vmcs12) | |
9997 | { | |
9998 | u32 idt_vectoring; | |
9999 | unsigned int nr; | |
10000 | ||
851eb667 | 10001 | if (vcpu->arch.exception.pending && vcpu->arch.exception.reinject) { |
5f3d5799 JK |
10002 | nr = vcpu->arch.exception.nr; |
10003 | idt_vectoring = nr | VECTORING_INFO_VALID_MASK; | |
10004 | ||
10005 | if (kvm_exception_is_soft(nr)) { | |
10006 | vmcs12->vm_exit_instruction_len = | |
10007 | vcpu->arch.event_exit_inst_len; | |
10008 | idt_vectoring |= INTR_TYPE_SOFT_EXCEPTION; | |
10009 | } else | |
10010 | idt_vectoring |= INTR_TYPE_HARD_EXCEPTION; | |
10011 | ||
10012 | if (vcpu->arch.exception.has_error_code) { | |
10013 | idt_vectoring |= VECTORING_INFO_DELIVER_CODE_MASK; | |
10014 | vmcs12->idt_vectoring_error_code = | |
10015 | vcpu->arch.exception.error_code; | |
10016 | } | |
10017 | ||
10018 | vmcs12->idt_vectoring_info_field = idt_vectoring; | |
cd2633c5 | 10019 | } else if (vcpu->arch.nmi_injected) { |
5f3d5799 JK |
10020 | vmcs12->idt_vectoring_info_field = |
10021 | INTR_TYPE_NMI_INTR | INTR_INFO_VALID_MASK | NMI_VECTOR; | |
10022 | } else if (vcpu->arch.interrupt.pending) { | |
10023 | nr = vcpu->arch.interrupt.nr; | |
10024 | idt_vectoring = nr | VECTORING_INFO_VALID_MASK; | |
10025 | ||
10026 | if (vcpu->arch.interrupt.soft) { | |
10027 | idt_vectoring |= INTR_TYPE_SOFT_INTR; | |
10028 | vmcs12->vm_entry_instruction_len = | |
10029 | vcpu->arch.event_exit_inst_len; | |
10030 | } else | |
10031 | idt_vectoring |= INTR_TYPE_EXT_INTR; | |
10032 | ||
10033 | vmcs12->idt_vectoring_info_field = idt_vectoring; | |
10034 | } | |
10035 | } | |
10036 | ||
b6b8a145 JK |
10037 | static int vmx_check_nested_events(struct kvm_vcpu *vcpu, bool external_intr) |
10038 | { | |
10039 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
10040 | ||
f4124500 JK |
10041 | if (nested_cpu_has_preemption_timer(get_vmcs12(vcpu)) && |
10042 | vmx->nested.preemption_timer_expired) { | |
10043 | if (vmx->nested.nested_run_pending) | |
10044 | return -EBUSY; | |
10045 | nested_vmx_vmexit(vcpu, EXIT_REASON_PREEMPTION_TIMER, 0, 0); | |
10046 | return 0; | |
10047 | } | |
10048 | ||
b6b8a145 | 10049 | if (vcpu->arch.nmi_pending && nested_exit_on_nmi(vcpu)) { |
220c5672 JK |
10050 | if (vmx->nested.nested_run_pending || |
10051 | vcpu->arch.interrupt.pending) | |
b6b8a145 JK |
10052 | return -EBUSY; |
10053 | nested_vmx_vmexit(vcpu, EXIT_REASON_EXCEPTION_NMI, | |
10054 | NMI_VECTOR | INTR_TYPE_NMI_INTR | | |
10055 | INTR_INFO_VALID_MASK, 0); | |
10056 | /* | |
10057 | * The NMI-triggered VM exit counts as injection: | |
10058 | * clear this one and block further NMIs. | |
10059 | */ | |
10060 | vcpu->arch.nmi_pending = 0; | |
10061 | vmx_set_nmi_mask(vcpu, true); | |
10062 | return 0; | |
10063 | } | |
10064 | ||
10065 | if ((kvm_cpu_has_interrupt(vcpu) || external_intr) && | |
10066 | nested_exit_on_intr(vcpu)) { | |
10067 | if (vmx->nested.nested_run_pending) | |
10068 | return -EBUSY; | |
10069 | nested_vmx_vmexit(vcpu, EXIT_REASON_EXTERNAL_INTERRUPT, 0, 0); | |
705699a1 | 10070 | return 0; |
b6b8a145 JK |
10071 | } |
10072 | ||
705699a1 | 10073 | return vmx_complete_nested_posted_interrupt(vcpu); |
b6b8a145 JK |
10074 | } |
10075 | ||
f4124500 JK |
10076 | static u32 vmx_get_preemption_timer_value(struct kvm_vcpu *vcpu) |
10077 | { | |
10078 | ktime_t remaining = | |
10079 | hrtimer_get_remaining(&to_vmx(vcpu)->nested.preemption_timer); | |
10080 | u64 value; | |
10081 | ||
10082 | if (ktime_to_ns(remaining) <= 0) | |
10083 | return 0; | |
10084 | ||
10085 | value = ktime_to_ns(remaining) * vcpu->arch.virtual_tsc_khz; | |
10086 | do_div(value, 1000000); | |
10087 | return value >> VMX_MISC_EMULATED_PREEMPTION_TIMER_RATE; | |
10088 | } | |
10089 | ||
4704d0be NHE |
10090 | /* |
10091 | * prepare_vmcs12 is part of what we need to do when the nested L2 guest exits | |
10092 | * and we want to prepare to run its L1 parent. L1 keeps a vmcs for L2 (vmcs12), | |
10093 | * and this function updates it to reflect the changes to the guest state while | |
10094 | * L2 was running (and perhaps made some exits which were handled directly by L0 | |
10095 | * without going back to L1), and to reflect the exit reason. | |
10096 | * Note that we do not have to copy here all VMCS fields, just those that | |
10097 | * could have changed by the L2 guest or the exit - i.e., the guest-state and | |
10098 | * exit-information fields only. Other fields are modified by L1 with VMWRITE, | |
10099 | * which already writes to vmcs12 directly. | |
10100 | */ | |
533558bc JK |
10101 | static void prepare_vmcs12(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12, |
10102 | u32 exit_reason, u32 exit_intr_info, | |
10103 | unsigned long exit_qualification) | |
4704d0be NHE |
10104 | { |
10105 | /* update guest state fields: */ | |
10106 | vmcs12->guest_cr0 = vmcs12_guest_cr0(vcpu, vmcs12); | |
10107 | vmcs12->guest_cr4 = vmcs12_guest_cr4(vcpu, vmcs12); | |
10108 | ||
4704d0be NHE |
10109 | vmcs12->guest_rsp = kvm_register_read(vcpu, VCPU_REGS_RSP); |
10110 | vmcs12->guest_rip = kvm_register_read(vcpu, VCPU_REGS_RIP); | |
10111 | vmcs12->guest_rflags = vmcs_readl(GUEST_RFLAGS); | |
10112 | ||
10113 | vmcs12->guest_es_selector = vmcs_read16(GUEST_ES_SELECTOR); | |
10114 | vmcs12->guest_cs_selector = vmcs_read16(GUEST_CS_SELECTOR); | |
10115 | vmcs12->guest_ss_selector = vmcs_read16(GUEST_SS_SELECTOR); | |
10116 | vmcs12->guest_ds_selector = vmcs_read16(GUEST_DS_SELECTOR); | |
10117 | vmcs12->guest_fs_selector = vmcs_read16(GUEST_FS_SELECTOR); | |
10118 | vmcs12->guest_gs_selector = vmcs_read16(GUEST_GS_SELECTOR); | |
10119 | vmcs12->guest_ldtr_selector = vmcs_read16(GUEST_LDTR_SELECTOR); | |
10120 | vmcs12->guest_tr_selector = vmcs_read16(GUEST_TR_SELECTOR); | |
10121 | vmcs12->guest_es_limit = vmcs_read32(GUEST_ES_LIMIT); | |
10122 | vmcs12->guest_cs_limit = vmcs_read32(GUEST_CS_LIMIT); | |
10123 | vmcs12->guest_ss_limit = vmcs_read32(GUEST_SS_LIMIT); | |
10124 | vmcs12->guest_ds_limit = vmcs_read32(GUEST_DS_LIMIT); | |
10125 | vmcs12->guest_fs_limit = vmcs_read32(GUEST_FS_LIMIT); | |
10126 | vmcs12->guest_gs_limit = vmcs_read32(GUEST_GS_LIMIT); | |
10127 | vmcs12->guest_ldtr_limit = vmcs_read32(GUEST_LDTR_LIMIT); | |
10128 | vmcs12->guest_tr_limit = vmcs_read32(GUEST_TR_LIMIT); | |
10129 | vmcs12->guest_gdtr_limit = vmcs_read32(GUEST_GDTR_LIMIT); | |
10130 | vmcs12->guest_idtr_limit = vmcs_read32(GUEST_IDTR_LIMIT); | |
10131 | vmcs12->guest_es_ar_bytes = vmcs_read32(GUEST_ES_AR_BYTES); | |
10132 | vmcs12->guest_cs_ar_bytes = vmcs_read32(GUEST_CS_AR_BYTES); | |
10133 | vmcs12->guest_ss_ar_bytes = vmcs_read32(GUEST_SS_AR_BYTES); | |
10134 | vmcs12->guest_ds_ar_bytes = vmcs_read32(GUEST_DS_AR_BYTES); | |
10135 | vmcs12->guest_fs_ar_bytes = vmcs_read32(GUEST_FS_AR_BYTES); | |
10136 | vmcs12->guest_gs_ar_bytes = vmcs_read32(GUEST_GS_AR_BYTES); | |
10137 | vmcs12->guest_ldtr_ar_bytes = vmcs_read32(GUEST_LDTR_AR_BYTES); | |
10138 | vmcs12->guest_tr_ar_bytes = vmcs_read32(GUEST_TR_AR_BYTES); | |
10139 | vmcs12->guest_es_base = vmcs_readl(GUEST_ES_BASE); | |
10140 | vmcs12->guest_cs_base = vmcs_readl(GUEST_CS_BASE); | |
10141 | vmcs12->guest_ss_base = vmcs_readl(GUEST_SS_BASE); | |
10142 | vmcs12->guest_ds_base = vmcs_readl(GUEST_DS_BASE); | |
10143 | vmcs12->guest_fs_base = vmcs_readl(GUEST_FS_BASE); | |
10144 | vmcs12->guest_gs_base = vmcs_readl(GUEST_GS_BASE); | |
10145 | vmcs12->guest_ldtr_base = vmcs_readl(GUEST_LDTR_BASE); | |
10146 | vmcs12->guest_tr_base = vmcs_readl(GUEST_TR_BASE); | |
10147 | vmcs12->guest_gdtr_base = vmcs_readl(GUEST_GDTR_BASE); | |
10148 | vmcs12->guest_idtr_base = vmcs_readl(GUEST_IDTR_BASE); | |
10149 | ||
4704d0be NHE |
10150 | vmcs12->guest_interruptibility_info = |
10151 | vmcs_read32(GUEST_INTERRUPTIBILITY_INFO); | |
10152 | vmcs12->guest_pending_dbg_exceptions = | |
10153 | vmcs_readl(GUEST_PENDING_DBG_EXCEPTIONS); | |
3edf1e69 JK |
10154 | if (vcpu->arch.mp_state == KVM_MP_STATE_HALTED) |
10155 | vmcs12->guest_activity_state = GUEST_ACTIVITY_HLT; | |
10156 | else | |
10157 | vmcs12->guest_activity_state = GUEST_ACTIVITY_ACTIVE; | |
4704d0be | 10158 | |
f4124500 JK |
10159 | if (nested_cpu_has_preemption_timer(vmcs12)) { |
10160 | if (vmcs12->vm_exit_controls & | |
10161 | VM_EXIT_SAVE_VMX_PREEMPTION_TIMER) | |
10162 | vmcs12->vmx_preemption_timer_value = | |
10163 | vmx_get_preemption_timer_value(vcpu); | |
10164 | hrtimer_cancel(&to_vmx(vcpu)->nested.preemption_timer); | |
10165 | } | |
7854cbca | 10166 | |
3633cfc3 NHE |
10167 | /* |
10168 | * In some cases (usually, nested EPT), L2 is allowed to change its | |
10169 | * own CR3 without exiting. If it has changed it, we must keep it. | |
10170 | * Of course, if L0 is using shadow page tables, GUEST_CR3 was defined | |
10171 | * by L0, not L1 or L2, so we mustn't unconditionally copy it to vmcs12. | |
10172 | * | |
10173 | * Additionally, restore L2's PDPTR to vmcs12. | |
10174 | */ | |
10175 | if (enable_ept) { | |
10176 | vmcs12->guest_cr3 = vmcs_read64(GUEST_CR3); | |
10177 | vmcs12->guest_pdptr0 = vmcs_read64(GUEST_PDPTR0); | |
10178 | vmcs12->guest_pdptr1 = vmcs_read64(GUEST_PDPTR1); | |
10179 | vmcs12->guest_pdptr2 = vmcs_read64(GUEST_PDPTR2); | |
10180 | vmcs12->guest_pdptr3 = vmcs_read64(GUEST_PDPTR3); | |
10181 | } | |
10182 | ||
608406e2 WV |
10183 | if (nested_cpu_has_vid(vmcs12)) |
10184 | vmcs12->guest_intr_status = vmcs_read16(GUEST_INTR_STATUS); | |
10185 | ||
c18911a2 JK |
10186 | vmcs12->vm_entry_controls = |
10187 | (vmcs12->vm_entry_controls & ~VM_ENTRY_IA32E_MODE) | | |
2961e876 | 10188 | (vm_entry_controls_get(to_vmx(vcpu)) & VM_ENTRY_IA32E_MODE); |
c18911a2 | 10189 | |
2996fca0 JK |
10190 | if (vmcs12->vm_exit_controls & VM_EXIT_SAVE_DEBUG_CONTROLS) { |
10191 | kvm_get_dr(vcpu, 7, (unsigned long *)&vmcs12->guest_dr7); | |
10192 | vmcs12->guest_ia32_debugctl = vmcs_read64(GUEST_IA32_DEBUGCTL); | |
10193 | } | |
10194 | ||
4704d0be NHE |
10195 | /* TODO: These cannot have changed unless we have MSR bitmaps and |
10196 | * the relevant bit asks not to trap the change */ | |
b8c07d55 | 10197 | if (vmcs12->vm_exit_controls & VM_EXIT_SAVE_IA32_PAT) |
4704d0be | 10198 | vmcs12->guest_ia32_pat = vmcs_read64(GUEST_IA32_PAT); |
10ba54a5 JK |
10199 | if (vmcs12->vm_exit_controls & VM_EXIT_SAVE_IA32_EFER) |
10200 | vmcs12->guest_ia32_efer = vcpu->arch.efer; | |
4704d0be NHE |
10201 | vmcs12->guest_sysenter_cs = vmcs_read32(GUEST_SYSENTER_CS); |
10202 | vmcs12->guest_sysenter_esp = vmcs_readl(GUEST_SYSENTER_ESP); | |
10203 | vmcs12->guest_sysenter_eip = vmcs_readl(GUEST_SYSENTER_EIP); | |
36be0b9d PB |
10204 | if (vmx_mpx_supported()) |
10205 | vmcs12->guest_bndcfgs = vmcs_read64(GUEST_BNDCFGS); | |
81dc01f7 WL |
10206 | if (nested_cpu_has_xsaves(vmcs12)) |
10207 | vmcs12->xss_exit_bitmap = vmcs_read64(XSS_EXIT_BITMAP); | |
4704d0be NHE |
10208 | |
10209 | /* update exit information fields: */ | |
10210 | ||
533558bc JK |
10211 | vmcs12->vm_exit_reason = exit_reason; |
10212 | vmcs12->exit_qualification = exit_qualification; | |
4704d0be | 10213 | |
533558bc | 10214 | vmcs12->vm_exit_intr_info = exit_intr_info; |
c0d1c770 JK |
10215 | if ((vmcs12->vm_exit_intr_info & |
10216 | (INTR_INFO_VALID_MASK | INTR_INFO_DELIVER_CODE_MASK)) == | |
10217 | (INTR_INFO_VALID_MASK | INTR_INFO_DELIVER_CODE_MASK)) | |
10218 | vmcs12->vm_exit_intr_error_code = | |
10219 | vmcs_read32(VM_EXIT_INTR_ERROR_CODE); | |
5f3d5799 | 10220 | vmcs12->idt_vectoring_info_field = 0; |
4704d0be NHE |
10221 | vmcs12->vm_exit_instruction_len = vmcs_read32(VM_EXIT_INSTRUCTION_LEN); |
10222 | vmcs12->vmx_instruction_info = vmcs_read32(VMX_INSTRUCTION_INFO); | |
10223 | ||
5f3d5799 JK |
10224 | if (!(vmcs12->vm_exit_reason & VMX_EXIT_REASONS_FAILED_VMENTRY)) { |
10225 | /* vm_entry_intr_info_field is cleared on exit. Emulate this | |
10226 | * instead of reading the real value. */ | |
4704d0be | 10227 | vmcs12->vm_entry_intr_info_field &= ~INTR_INFO_VALID_MASK; |
5f3d5799 JK |
10228 | |
10229 | /* | |
10230 | * Transfer the event that L0 or L1 may wanted to inject into | |
10231 | * L2 to IDT_VECTORING_INFO_FIELD. | |
10232 | */ | |
10233 | vmcs12_save_pending_event(vcpu, vmcs12); | |
10234 | } | |
10235 | ||
10236 | /* | |
10237 | * Drop what we picked up for L2 via vmx_complete_interrupts. It is | |
10238 | * preserved above and would only end up incorrectly in L1. | |
10239 | */ | |
10240 | vcpu->arch.nmi_injected = false; | |
10241 | kvm_clear_exception_queue(vcpu); | |
10242 | kvm_clear_interrupt_queue(vcpu); | |
4704d0be NHE |
10243 | } |
10244 | ||
10245 | /* | |
10246 | * A part of what we need to when the nested L2 guest exits and we want to | |
10247 | * run its L1 parent, is to reset L1's guest state to the host state specified | |
10248 | * in vmcs12. | |
10249 | * This function is to be called not only on normal nested exit, but also on | |
10250 | * a nested entry failure, as explained in Intel's spec, 3B.23.7 ("VM-Entry | |
10251 | * Failures During or After Loading Guest State"). | |
10252 | * This function should be called when the active VMCS is L1's (vmcs01). | |
10253 | */ | |
733568f9 JK |
10254 | static void load_vmcs12_host_state(struct kvm_vcpu *vcpu, |
10255 | struct vmcs12 *vmcs12) | |
4704d0be | 10256 | { |
21feb4eb ACL |
10257 | struct kvm_segment seg; |
10258 | ||
4704d0be NHE |
10259 | if (vmcs12->vm_exit_controls & VM_EXIT_LOAD_IA32_EFER) |
10260 | vcpu->arch.efer = vmcs12->host_ia32_efer; | |
d1fa0352 | 10261 | else if (vmcs12->vm_exit_controls & VM_EXIT_HOST_ADDR_SPACE_SIZE) |
4704d0be NHE |
10262 | vcpu->arch.efer |= (EFER_LMA | EFER_LME); |
10263 | else | |
10264 | vcpu->arch.efer &= ~(EFER_LMA | EFER_LME); | |
10265 | vmx_set_efer(vcpu, vcpu->arch.efer); | |
10266 | ||
10267 | kvm_register_write(vcpu, VCPU_REGS_RSP, vmcs12->host_rsp); | |
10268 | kvm_register_write(vcpu, VCPU_REGS_RIP, vmcs12->host_rip); | |
1adfa76a | 10269 | vmx_set_rflags(vcpu, X86_EFLAGS_FIXED); |
4704d0be NHE |
10270 | /* |
10271 | * Note that calling vmx_set_cr0 is important, even if cr0 hasn't | |
10272 | * actually changed, because it depends on the current state of | |
10273 | * fpu_active (which may have changed). | |
10274 | * Note that vmx_set_cr0 refers to efer set above. | |
10275 | */ | |
9e3e4dbf | 10276 | vmx_set_cr0(vcpu, vmcs12->host_cr0); |
4704d0be NHE |
10277 | /* |
10278 | * If we did fpu_activate()/fpu_deactivate() during L2's run, we need | |
10279 | * to apply the same changes to L1's vmcs. We just set cr0 correctly, | |
10280 | * but we also need to update cr0_guest_host_mask and exception_bitmap. | |
10281 | */ | |
10282 | update_exception_bitmap(vcpu); | |
10283 | vcpu->arch.cr0_guest_owned_bits = (vcpu->fpu_active ? X86_CR0_TS : 0); | |
10284 | vmcs_writel(CR0_GUEST_HOST_MASK, ~vcpu->arch.cr0_guest_owned_bits); | |
10285 | ||
10286 | /* | |
10287 | * Note that CR4_GUEST_HOST_MASK is already set in the original vmcs01 | |
10288 | * (KVM doesn't change it)- no reason to call set_cr4_guest_host_mask(); | |
10289 | */ | |
10290 | vcpu->arch.cr4_guest_owned_bits = ~vmcs_readl(CR4_GUEST_HOST_MASK); | |
10291 | kvm_set_cr4(vcpu, vmcs12->host_cr4); | |
10292 | ||
29bf08f1 | 10293 | nested_ept_uninit_mmu_context(vcpu); |
155a97a3 | 10294 | |
4704d0be NHE |
10295 | kvm_set_cr3(vcpu, vmcs12->host_cr3); |
10296 | kvm_mmu_reset_context(vcpu); | |
10297 | ||
feaf0c7d GN |
10298 | if (!enable_ept) |
10299 | vcpu->arch.walk_mmu->inject_page_fault = kvm_inject_page_fault; | |
10300 | ||
4704d0be NHE |
10301 | if (enable_vpid) { |
10302 | /* | |
10303 | * Trivially support vpid by letting L2s share their parent | |
10304 | * L1's vpid. TODO: move to a more elaborate solution, giving | |
10305 | * each L2 its own vpid and exposing the vpid feature to L1. | |
10306 | */ | |
10307 | vmx_flush_tlb(vcpu); | |
10308 | } | |
10309 | ||
10310 | ||
10311 | vmcs_write32(GUEST_SYSENTER_CS, vmcs12->host_ia32_sysenter_cs); | |
10312 | vmcs_writel(GUEST_SYSENTER_ESP, vmcs12->host_ia32_sysenter_esp); | |
10313 | vmcs_writel(GUEST_SYSENTER_EIP, vmcs12->host_ia32_sysenter_eip); | |
10314 | vmcs_writel(GUEST_IDTR_BASE, vmcs12->host_idtr_base); | |
10315 | vmcs_writel(GUEST_GDTR_BASE, vmcs12->host_gdtr_base); | |
4704d0be | 10316 | |
36be0b9d PB |
10317 | /* If not VM_EXIT_CLEAR_BNDCFGS, the L2 value propagates to L1. */ |
10318 | if (vmcs12->vm_exit_controls & VM_EXIT_CLEAR_BNDCFGS) | |
10319 | vmcs_write64(GUEST_BNDCFGS, 0); | |
10320 | ||
44811c02 | 10321 | if (vmcs12->vm_exit_controls & VM_EXIT_LOAD_IA32_PAT) { |
4704d0be | 10322 | vmcs_write64(GUEST_IA32_PAT, vmcs12->host_ia32_pat); |
44811c02 JK |
10323 | vcpu->arch.pat = vmcs12->host_ia32_pat; |
10324 | } | |
4704d0be NHE |
10325 | if (vmcs12->vm_exit_controls & VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL) |
10326 | vmcs_write64(GUEST_IA32_PERF_GLOBAL_CTRL, | |
10327 | vmcs12->host_ia32_perf_global_ctrl); | |
503cd0c5 | 10328 | |
21feb4eb ACL |
10329 | /* Set L1 segment info according to Intel SDM |
10330 | 27.5.2 Loading Host Segment and Descriptor-Table Registers */ | |
10331 | seg = (struct kvm_segment) { | |
10332 | .base = 0, | |
10333 | .limit = 0xFFFFFFFF, | |
10334 | .selector = vmcs12->host_cs_selector, | |
10335 | .type = 11, | |
10336 | .present = 1, | |
10337 | .s = 1, | |
10338 | .g = 1 | |
10339 | }; | |
10340 | if (vmcs12->vm_exit_controls & VM_EXIT_HOST_ADDR_SPACE_SIZE) | |
10341 | seg.l = 1; | |
10342 | else | |
10343 | seg.db = 1; | |
10344 | vmx_set_segment(vcpu, &seg, VCPU_SREG_CS); | |
10345 | seg = (struct kvm_segment) { | |
10346 | .base = 0, | |
10347 | .limit = 0xFFFFFFFF, | |
10348 | .type = 3, | |
10349 | .present = 1, | |
10350 | .s = 1, | |
10351 | .db = 1, | |
10352 | .g = 1 | |
10353 | }; | |
10354 | seg.selector = vmcs12->host_ds_selector; | |
10355 | vmx_set_segment(vcpu, &seg, VCPU_SREG_DS); | |
10356 | seg.selector = vmcs12->host_es_selector; | |
10357 | vmx_set_segment(vcpu, &seg, VCPU_SREG_ES); | |
10358 | seg.selector = vmcs12->host_ss_selector; | |
10359 | vmx_set_segment(vcpu, &seg, VCPU_SREG_SS); | |
10360 | seg.selector = vmcs12->host_fs_selector; | |
10361 | seg.base = vmcs12->host_fs_base; | |
10362 | vmx_set_segment(vcpu, &seg, VCPU_SREG_FS); | |
10363 | seg.selector = vmcs12->host_gs_selector; | |
10364 | seg.base = vmcs12->host_gs_base; | |
10365 | vmx_set_segment(vcpu, &seg, VCPU_SREG_GS); | |
10366 | seg = (struct kvm_segment) { | |
205befd9 | 10367 | .base = vmcs12->host_tr_base, |
21feb4eb ACL |
10368 | .limit = 0x67, |
10369 | .selector = vmcs12->host_tr_selector, | |
10370 | .type = 11, | |
10371 | .present = 1 | |
10372 | }; | |
10373 | vmx_set_segment(vcpu, &seg, VCPU_SREG_TR); | |
10374 | ||
503cd0c5 JK |
10375 | kvm_set_dr(vcpu, 7, 0x400); |
10376 | vmcs_write64(GUEST_IA32_DEBUGCTL, 0); | |
ff651cb6 | 10377 | |
3af18d9c WV |
10378 | if (cpu_has_vmx_msr_bitmap()) |
10379 | vmx_set_msr_bitmap(vcpu); | |
10380 | ||
ff651cb6 WV |
10381 | if (nested_vmx_load_msr(vcpu, vmcs12->vm_exit_msr_load_addr, |
10382 | vmcs12->vm_exit_msr_load_count)) | |
10383 | nested_vmx_abort(vcpu, VMX_ABORT_LOAD_HOST_MSR_FAIL); | |
4704d0be NHE |
10384 | } |
10385 | ||
10386 | /* | |
10387 | * Emulate an exit from nested guest (L2) to L1, i.e., prepare to run L1 | |
10388 | * and modify vmcs12 to make it see what it would expect to see there if | |
10389 | * L2 was its real guest. Must only be called when in L2 (is_guest_mode()) | |
10390 | */ | |
533558bc JK |
10391 | static void nested_vmx_vmexit(struct kvm_vcpu *vcpu, u32 exit_reason, |
10392 | u32 exit_intr_info, | |
10393 | unsigned long exit_qualification) | |
4704d0be NHE |
10394 | { |
10395 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
4704d0be NHE |
10396 | struct vmcs12 *vmcs12 = get_vmcs12(vcpu); |
10397 | ||
5f3d5799 JK |
10398 | /* trying to cancel vmlaunch/vmresume is a bug */ |
10399 | WARN_ON_ONCE(vmx->nested.nested_run_pending); | |
10400 | ||
4704d0be | 10401 | leave_guest_mode(vcpu); |
533558bc JK |
10402 | prepare_vmcs12(vcpu, vmcs12, exit_reason, exit_intr_info, |
10403 | exit_qualification); | |
4704d0be | 10404 | |
ff651cb6 WV |
10405 | if (nested_vmx_store_msr(vcpu, vmcs12->vm_exit_msr_store_addr, |
10406 | vmcs12->vm_exit_msr_store_count)) | |
10407 | nested_vmx_abort(vcpu, VMX_ABORT_SAVE_GUEST_MSR_FAIL); | |
10408 | ||
f3380ca5 WL |
10409 | vmx_load_vmcs01(vcpu); |
10410 | ||
77b0f5d6 BD |
10411 | if ((exit_reason == EXIT_REASON_EXTERNAL_INTERRUPT) |
10412 | && nested_exit_intr_ack_set(vcpu)) { | |
10413 | int irq = kvm_cpu_get_interrupt(vcpu); | |
10414 | WARN_ON(irq < 0); | |
10415 | vmcs12->vm_exit_intr_info = irq | | |
10416 | INTR_INFO_VALID_MASK | INTR_TYPE_EXT_INTR; | |
10417 | } | |
10418 | ||
542060ea JK |
10419 | trace_kvm_nested_vmexit_inject(vmcs12->vm_exit_reason, |
10420 | vmcs12->exit_qualification, | |
10421 | vmcs12->idt_vectoring_info_field, | |
10422 | vmcs12->vm_exit_intr_info, | |
10423 | vmcs12->vm_exit_intr_error_code, | |
10424 | KVM_ISA_VMX); | |
4704d0be | 10425 | |
2961e876 GN |
10426 | vm_entry_controls_init(vmx, vmcs_read32(VM_ENTRY_CONTROLS)); |
10427 | vm_exit_controls_init(vmx, vmcs_read32(VM_EXIT_CONTROLS)); | |
36c3cc42 JK |
10428 | vmx_segment_cache_clear(vmx); |
10429 | ||
4704d0be NHE |
10430 | /* if no vmcs02 cache requested, remove the one we used */ |
10431 | if (VMCS02_POOL_SIZE == 0) | |
10432 | nested_free_vmcs02(vmx, vmx->nested.current_vmptr); | |
10433 | ||
10434 | load_vmcs12_host_state(vcpu, vmcs12); | |
10435 | ||
27fc51b2 | 10436 | /* Update TSC_OFFSET if TSC was changed while L2 ran */ |
4704d0be NHE |
10437 | vmcs_write64(TSC_OFFSET, vmx->nested.vmcs01_tsc_offset); |
10438 | ||
10439 | /* This is needed for same reason as it was needed in prepare_vmcs02 */ | |
10440 | vmx->host_rsp = 0; | |
10441 | ||
10442 | /* Unpin physical memory we referred to in vmcs02 */ | |
10443 | if (vmx->nested.apic_access_page) { | |
10444 | nested_release_page(vmx->nested.apic_access_page); | |
48d89b92 | 10445 | vmx->nested.apic_access_page = NULL; |
4704d0be | 10446 | } |
a7c0b07d WL |
10447 | if (vmx->nested.virtual_apic_page) { |
10448 | nested_release_page(vmx->nested.virtual_apic_page); | |
48d89b92 | 10449 | vmx->nested.virtual_apic_page = NULL; |
a7c0b07d | 10450 | } |
705699a1 WV |
10451 | if (vmx->nested.pi_desc_page) { |
10452 | kunmap(vmx->nested.pi_desc_page); | |
10453 | nested_release_page(vmx->nested.pi_desc_page); | |
10454 | vmx->nested.pi_desc_page = NULL; | |
10455 | vmx->nested.pi_desc = NULL; | |
10456 | } | |
4704d0be | 10457 | |
38b99173 TC |
10458 | /* |
10459 | * We are now running in L2, mmu_notifier will force to reload the | |
10460 | * page's hpa for L2 vmcs. Need to reload it for L1 before entering L1. | |
10461 | */ | |
10462 | kvm_vcpu_reload_apic_access_page(vcpu); | |
10463 | ||
4704d0be NHE |
10464 | /* |
10465 | * Exiting from L2 to L1, we're now back to L1 which thinks it just | |
10466 | * finished a VMLAUNCH or VMRESUME instruction, so we need to set the | |
10467 | * success or failure flag accordingly. | |
10468 | */ | |
10469 | if (unlikely(vmx->fail)) { | |
10470 | vmx->fail = 0; | |
10471 | nested_vmx_failValid(vcpu, vmcs_read32(VM_INSTRUCTION_ERROR)); | |
10472 | } else | |
10473 | nested_vmx_succeed(vcpu); | |
012f83cb AG |
10474 | if (enable_shadow_vmcs) |
10475 | vmx->nested.sync_shadow_vmcs = true; | |
b6b8a145 JK |
10476 | |
10477 | /* in case we halted in L2 */ | |
10478 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; | |
4704d0be NHE |
10479 | } |
10480 | ||
42124925 JK |
10481 | /* |
10482 | * Forcibly leave nested mode in order to be able to reset the VCPU later on. | |
10483 | */ | |
10484 | static void vmx_leave_nested(struct kvm_vcpu *vcpu) | |
10485 | { | |
10486 | if (is_guest_mode(vcpu)) | |
533558bc | 10487 | nested_vmx_vmexit(vcpu, -1, 0, 0); |
42124925 JK |
10488 | free_nested(to_vmx(vcpu)); |
10489 | } | |
10490 | ||
7c177938 NHE |
10491 | /* |
10492 | * L1's failure to enter L2 is a subset of a normal exit, as explained in | |
10493 | * 23.7 "VM-entry failures during or after loading guest state" (this also | |
10494 | * lists the acceptable exit-reason and exit-qualification parameters). | |
10495 | * It should only be called before L2 actually succeeded to run, and when | |
10496 | * vmcs01 is current (it doesn't leave_guest_mode() or switch vmcss). | |
10497 | */ | |
10498 | static void nested_vmx_entry_failure(struct kvm_vcpu *vcpu, | |
10499 | struct vmcs12 *vmcs12, | |
10500 | u32 reason, unsigned long qualification) | |
10501 | { | |
10502 | load_vmcs12_host_state(vcpu, vmcs12); | |
10503 | vmcs12->vm_exit_reason = reason | VMX_EXIT_REASONS_FAILED_VMENTRY; | |
10504 | vmcs12->exit_qualification = qualification; | |
10505 | nested_vmx_succeed(vcpu); | |
012f83cb AG |
10506 | if (enable_shadow_vmcs) |
10507 | to_vmx(vcpu)->nested.sync_shadow_vmcs = true; | |
7c177938 NHE |
10508 | } |
10509 | ||
8a76d7f2 JR |
10510 | static int vmx_check_intercept(struct kvm_vcpu *vcpu, |
10511 | struct x86_instruction_info *info, | |
10512 | enum x86_intercept_stage stage) | |
10513 | { | |
10514 | return X86EMUL_CONTINUE; | |
10515 | } | |
10516 | ||
48d89b92 | 10517 | static void vmx_sched_in(struct kvm_vcpu *vcpu, int cpu) |
ae97a3b8 | 10518 | { |
b4a2d31d RK |
10519 | if (ple_gap) |
10520 | shrink_ple_window(vcpu); | |
ae97a3b8 RK |
10521 | } |
10522 | ||
843e4330 KH |
10523 | static void vmx_slot_enable_log_dirty(struct kvm *kvm, |
10524 | struct kvm_memory_slot *slot) | |
10525 | { | |
10526 | kvm_mmu_slot_leaf_clear_dirty(kvm, slot); | |
10527 | kvm_mmu_slot_largepage_remove_write_access(kvm, slot); | |
10528 | } | |
10529 | ||
10530 | static void vmx_slot_disable_log_dirty(struct kvm *kvm, | |
10531 | struct kvm_memory_slot *slot) | |
10532 | { | |
10533 | kvm_mmu_slot_set_dirty(kvm, slot); | |
10534 | } | |
10535 | ||
10536 | static void vmx_flush_log_dirty(struct kvm *kvm) | |
10537 | { | |
10538 | kvm_flush_pml_buffers(kvm); | |
10539 | } | |
10540 | ||
10541 | static void vmx_enable_log_dirty_pt_masked(struct kvm *kvm, | |
10542 | struct kvm_memory_slot *memslot, | |
10543 | gfn_t offset, unsigned long mask) | |
10544 | { | |
10545 | kvm_mmu_clear_dirty_pt_masked(kvm, memslot, offset, mask); | |
10546 | } | |
10547 | ||
bf9f6ac8 FW |
10548 | /* |
10549 | * This routine does the following things for vCPU which is going | |
10550 | * to be blocked if VT-d PI is enabled. | |
10551 | * - Store the vCPU to the wakeup list, so when interrupts happen | |
10552 | * we can find the right vCPU to wake up. | |
10553 | * - Change the Posted-interrupt descriptor as below: | |
10554 | * 'NDST' <-- vcpu->pre_pcpu | |
10555 | * 'NV' <-- POSTED_INTR_WAKEUP_VECTOR | |
10556 | * - If 'ON' is set during this process, which means at least one | |
10557 | * interrupt is posted for this vCPU, we cannot block it, in | |
10558 | * this case, return 1, otherwise, return 0. | |
10559 | * | |
10560 | */ | |
10561 | static int vmx_pre_block(struct kvm_vcpu *vcpu) | |
10562 | { | |
10563 | unsigned long flags; | |
10564 | unsigned int dest; | |
10565 | struct pi_desc old, new; | |
10566 | struct pi_desc *pi_desc = vcpu_to_pi_desc(vcpu); | |
10567 | ||
10568 | if (!kvm_arch_has_assigned_device(vcpu->kvm) || | |
10569 | !irq_remapping_cap(IRQ_POSTING_CAP)) | |
10570 | return 0; | |
10571 | ||
10572 | vcpu->pre_pcpu = vcpu->cpu; | |
10573 | spin_lock_irqsave(&per_cpu(blocked_vcpu_on_cpu_lock, | |
10574 | vcpu->pre_pcpu), flags); | |
10575 | list_add_tail(&vcpu->blocked_vcpu_list, | |
10576 | &per_cpu(blocked_vcpu_on_cpu, | |
10577 | vcpu->pre_pcpu)); | |
10578 | spin_unlock_irqrestore(&per_cpu(blocked_vcpu_on_cpu_lock, | |
10579 | vcpu->pre_pcpu), flags); | |
10580 | ||
10581 | do { | |
10582 | old.control = new.control = pi_desc->control; | |
10583 | ||
10584 | /* | |
10585 | * We should not block the vCPU if | |
10586 | * an interrupt is posted for it. | |
10587 | */ | |
10588 | if (pi_test_on(pi_desc) == 1) { | |
10589 | spin_lock_irqsave(&per_cpu(blocked_vcpu_on_cpu_lock, | |
10590 | vcpu->pre_pcpu), flags); | |
10591 | list_del(&vcpu->blocked_vcpu_list); | |
10592 | spin_unlock_irqrestore( | |
10593 | &per_cpu(blocked_vcpu_on_cpu_lock, | |
10594 | vcpu->pre_pcpu), flags); | |
10595 | vcpu->pre_pcpu = -1; | |
10596 | ||
10597 | return 1; | |
10598 | } | |
10599 | ||
10600 | WARN((pi_desc->sn == 1), | |
10601 | "Warning: SN field of posted-interrupts " | |
10602 | "is set before blocking\n"); | |
10603 | ||
10604 | /* | |
10605 | * Since vCPU can be preempted during this process, | |
10606 | * vcpu->cpu could be different with pre_pcpu, we | |
10607 | * need to set pre_pcpu as the destination of wakeup | |
10608 | * notification event, then we can find the right vCPU | |
10609 | * to wakeup in wakeup handler if interrupts happen | |
10610 | * when the vCPU is in blocked state. | |
10611 | */ | |
10612 | dest = cpu_physical_id(vcpu->pre_pcpu); | |
10613 | ||
10614 | if (x2apic_enabled()) | |
10615 | new.ndst = dest; | |
10616 | else | |
10617 | new.ndst = (dest << 8) & 0xFF00; | |
10618 | ||
10619 | /* set 'NV' to 'wakeup vector' */ | |
10620 | new.nv = POSTED_INTR_WAKEUP_VECTOR; | |
10621 | } while (cmpxchg(&pi_desc->control, old.control, | |
10622 | new.control) != old.control); | |
10623 | ||
10624 | return 0; | |
10625 | } | |
10626 | ||
10627 | static void vmx_post_block(struct kvm_vcpu *vcpu) | |
10628 | { | |
10629 | struct pi_desc *pi_desc = vcpu_to_pi_desc(vcpu); | |
10630 | struct pi_desc old, new; | |
10631 | unsigned int dest; | |
10632 | unsigned long flags; | |
10633 | ||
10634 | if (!kvm_arch_has_assigned_device(vcpu->kvm) || | |
10635 | !irq_remapping_cap(IRQ_POSTING_CAP)) | |
10636 | return; | |
10637 | ||
10638 | do { | |
10639 | old.control = new.control = pi_desc->control; | |
10640 | ||
10641 | dest = cpu_physical_id(vcpu->cpu); | |
10642 | ||
10643 | if (x2apic_enabled()) | |
10644 | new.ndst = dest; | |
10645 | else | |
10646 | new.ndst = (dest << 8) & 0xFF00; | |
10647 | ||
10648 | /* Allow posting non-urgent interrupts */ | |
10649 | new.sn = 0; | |
10650 | ||
10651 | /* set 'NV' to 'notification vector' */ | |
10652 | new.nv = POSTED_INTR_VECTOR; | |
10653 | } while (cmpxchg(&pi_desc->control, old.control, | |
10654 | new.control) != old.control); | |
10655 | ||
10656 | if(vcpu->pre_pcpu != -1) { | |
10657 | spin_lock_irqsave( | |
10658 | &per_cpu(blocked_vcpu_on_cpu_lock, | |
10659 | vcpu->pre_pcpu), flags); | |
10660 | list_del(&vcpu->blocked_vcpu_list); | |
10661 | spin_unlock_irqrestore( | |
10662 | &per_cpu(blocked_vcpu_on_cpu_lock, | |
10663 | vcpu->pre_pcpu), flags); | |
10664 | vcpu->pre_pcpu = -1; | |
10665 | } | |
10666 | } | |
10667 | ||
efc64404 FW |
10668 | /* |
10669 | * vmx_update_pi_irte - set IRTE for Posted-Interrupts | |
10670 | * | |
10671 | * @kvm: kvm | |
10672 | * @host_irq: host irq of the interrupt | |
10673 | * @guest_irq: gsi of the interrupt | |
10674 | * @set: set or unset PI | |
10675 | * returns 0 on success, < 0 on failure | |
10676 | */ | |
10677 | static int vmx_update_pi_irte(struct kvm *kvm, unsigned int host_irq, | |
10678 | uint32_t guest_irq, bool set) | |
10679 | { | |
10680 | struct kvm_kernel_irq_routing_entry *e; | |
10681 | struct kvm_irq_routing_table *irq_rt; | |
10682 | struct kvm_lapic_irq irq; | |
10683 | struct kvm_vcpu *vcpu; | |
10684 | struct vcpu_data vcpu_info; | |
10685 | int idx, ret = -EINVAL; | |
10686 | ||
10687 | if (!kvm_arch_has_assigned_device(kvm) || | |
10688 | !irq_remapping_cap(IRQ_POSTING_CAP)) | |
10689 | return 0; | |
10690 | ||
10691 | idx = srcu_read_lock(&kvm->irq_srcu); | |
10692 | irq_rt = srcu_dereference(kvm->irq_routing, &kvm->irq_srcu); | |
10693 | BUG_ON(guest_irq >= irq_rt->nr_rt_entries); | |
10694 | ||
10695 | hlist_for_each_entry(e, &irq_rt->map[guest_irq], link) { | |
10696 | if (e->type != KVM_IRQ_ROUTING_MSI) | |
10697 | continue; | |
10698 | /* | |
10699 | * VT-d PI cannot support posting multicast/broadcast | |
10700 | * interrupts to a vCPU, we still use interrupt remapping | |
10701 | * for these kind of interrupts. | |
10702 | * | |
10703 | * For lowest-priority interrupts, we only support | |
10704 | * those with single CPU as the destination, e.g. user | |
10705 | * configures the interrupts via /proc/irq or uses | |
10706 | * irqbalance to make the interrupts single-CPU. | |
10707 | * | |
10708 | * We will support full lowest-priority interrupt later. | |
10709 | */ | |
10710 | ||
10711 | kvm_set_msi_irq(e, &irq); | |
10712 | if (!kvm_intr_is_single_vcpu(kvm, &irq, &vcpu)) | |
10713 | continue; | |
10714 | ||
10715 | vcpu_info.pi_desc_addr = __pa(vcpu_to_pi_desc(vcpu)); | |
10716 | vcpu_info.vector = irq.vector; | |
10717 | ||
10718 | trace_kvm_pi_irte_update(vcpu->vcpu_id, e->gsi, | |
10719 | vcpu_info.vector, vcpu_info.pi_desc_addr, set); | |
10720 | ||
10721 | if (set) | |
10722 | ret = irq_set_vcpu_affinity(host_irq, &vcpu_info); | |
10723 | else { | |
10724 | /* suppress notification event before unposting */ | |
10725 | pi_set_sn(vcpu_to_pi_desc(vcpu)); | |
10726 | ret = irq_set_vcpu_affinity(host_irq, NULL); | |
10727 | pi_clear_sn(vcpu_to_pi_desc(vcpu)); | |
10728 | } | |
10729 | ||
10730 | if (ret < 0) { | |
10731 | printk(KERN_INFO "%s: failed to update PI IRTE\n", | |
10732 | __func__); | |
10733 | goto out; | |
10734 | } | |
10735 | } | |
10736 | ||
10737 | ret = 0; | |
10738 | out: | |
10739 | srcu_read_unlock(&kvm->irq_srcu, idx); | |
10740 | return ret; | |
10741 | } | |
10742 | ||
cbdd1bea | 10743 | static struct kvm_x86_ops vmx_x86_ops = { |
6aa8b732 AK |
10744 | .cpu_has_kvm_support = cpu_has_kvm_support, |
10745 | .disabled_by_bios = vmx_disabled_by_bios, | |
10746 | .hardware_setup = hardware_setup, | |
10747 | .hardware_unsetup = hardware_unsetup, | |
002c7f7c | 10748 | .check_processor_compatibility = vmx_check_processor_compat, |
6aa8b732 AK |
10749 | .hardware_enable = hardware_enable, |
10750 | .hardware_disable = hardware_disable, | |
04547156 | 10751 | .cpu_has_accelerated_tpr = report_flexpriority, |
6d396b55 | 10752 | .cpu_has_high_real_mode_segbase = vmx_has_high_real_mode_segbase, |
6aa8b732 AK |
10753 | |
10754 | .vcpu_create = vmx_create_vcpu, | |
10755 | .vcpu_free = vmx_free_vcpu, | |
04d2cc77 | 10756 | .vcpu_reset = vmx_vcpu_reset, |
6aa8b732 | 10757 | |
04d2cc77 | 10758 | .prepare_guest_switch = vmx_save_host_state, |
6aa8b732 AK |
10759 | .vcpu_load = vmx_vcpu_load, |
10760 | .vcpu_put = vmx_vcpu_put, | |
10761 | ||
c8639010 | 10762 | .update_db_bp_intercept = update_exception_bitmap, |
6aa8b732 AK |
10763 | .get_msr = vmx_get_msr, |
10764 | .set_msr = vmx_set_msr, | |
10765 | .get_segment_base = vmx_get_segment_base, | |
10766 | .get_segment = vmx_get_segment, | |
10767 | .set_segment = vmx_set_segment, | |
2e4d2653 | 10768 | .get_cpl = vmx_get_cpl, |
6aa8b732 | 10769 | .get_cs_db_l_bits = vmx_get_cs_db_l_bits, |
e8467fda | 10770 | .decache_cr0_guest_bits = vmx_decache_cr0_guest_bits, |
aff48baa | 10771 | .decache_cr3 = vmx_decache_cr3, |
25c4c276 | 10772 | .decache_cr4_guest_bits = vmx_decache_cr4_guest_bits, |
6aa8b732 | 10773 | .set_cr0 = vmx_set_cr0, |
6aa8b732 AK |
10774 | .set_cr3 = vmx_set_cr3, |
10775 | .set_cr4 = vmx_set_cr4, | |
6aa8b732 | 10776 | .set_efer = vmx_set_efer, |
6aa8b732 AK |
10777 | .get_idt = vmx_get_idt, |
10778 | .set_idt = vmx_set_idt, | |
10779 | .get_gdt = vmx_get_gdt, | |
10780 | .set_gdt = vmx_set_gdt, | |
73aaf249 JK |
10781 | .get_dr6 = vmx_get_dr6, |
10782 | .set_dr6 = vmx_set_dr6, | |
020df079 | 10783 | .set_dr7 = vmx_set_dr7, |
81908bf4 | 10784 | .sync_dirty_debug_regs = vmx_sync_dirty_debug_regs, |
5fdbf976 | 10785 | .cache_reg = vmx_cache_reg, |
6aa8b732 AK |
10786 | .get_rflags = vmx_get_rflags, |
10787 | .set_rflags = vmx_set_rflags, | |
0fdd74f7 | 10788 | .fpu_activate = vmx_fpu_activate, |
02daab21 | 10789 | .fpu_deactivate = vmx_fpu_deactivate, |
6aa8b732 AK |
10790 | |
10791 | .tlb_flush = vmx_flush_tlb, | |
6aa8b732 | 10792 | |
6aa8b732 | 10793 | .run = vmx_vcpu_run, |
6062d012 | 10794 | .handle_exit = vmx_handle_exit, |
6aa8b732 | 10795 | .skip_emulated_instruction = skip_emulated_instruction, |
2809f5d2 GC |
10796 | .set_interrupt_shadow = vmx_set_interrupt_shadow, |
10797 | .get_interrupt_shadow = vmx_get_interrupt_shadow, | |
102d8325 | 10798 | .patch_hypercall = vmx_patch_hypercall, |
2a8067f1 | 10799 | .set_irq = vmx_inject_irq, |
95ba8273 | 10800 | .set_nmi = vmx_inject_nmi, |
298101da | 10801 | .queue_exception = vmx_queue_exception, |
b463a6f7 | 10802 | .cancel_injection = vmx_cancel_injection, |
78646121 | 10803 | .interrupt_allowed = vmx_interrupt_allowed, |
95ba8273 | 10804 | .nmi_allowed = vmx_nmi_allowed, |
3cfc3092 JK |
10805 | .get_nmi_mask = vmx_get_nmi_mask, |
10806 | .set_nmi_mask = vmx_set_nmi_mask, | |
95ba8273 GN |
10807 | .enable_nmi_window = enable_nmi_window, |
10808 | .enable_irq_window = enable_irq_window, | |
10809 | .update_cr8_intercept = update_cr8_intercept, | |
8d14695f | 10810 | .set_virtual_x2apic_mode = vmx_set_virtual_x2apic_mode, |
38b99173 | 10811 | .set_apic_access_page_addr = vmx_set_apic_access_page_addr, |
d50ab6c1 | 10812 | .cpu_uses_apicv = vmx_cpu_uses_apicv, |
c7c9c56c YZ |
10813 | .load_eoi_exitmap = vmx_load_eoi_exitmap, |
10814 | .hwapic_irr_update = vmx_hwapic_irr_update, | |
10815 | .hwapic_isr_update = vmx_hwapic_isr_update, | |
a20ed54d YZ |
10816 | .sync_pir_to_irr = vmx_sync_pir_to_irr, |
10817 | .deliver_posted_interrupt = vmx_deliver_posted_interrupt, | |
95ba8273 | 10818 | |
cbc94022 | 10819 | .set_tss_addr = vmx_set_tss_addr, |
67253af5 | 10820 | .get_tdp_level = get_ept_level, |
4b12f0de | 10821 | .get_mt_mask = vmx_get_mt_mask, |
229456fc | 10822 | |
586f9607 | 10823 | .get_exit_info = vmx_get_exit_info, |
586f9607 | 10824 | |
17cc3935 | 10825 | .get_lpage_level = vmx_get_lpage_level, |
0e851880 SY |
10826 | |
10827 | .cpuid_update = vmx_cpuid_update, | |
4e47c7a6 SY |
10828 | |
10829 | .rdtscp_supported = vmx_rdtscp_supported, | |
ad756a16 | 10830 | .invpcid_supported = vmx_invpcid_supported, |
d4330ef2 JR |
10831 | |
10832 | .set_supported_cpuid = vmx_set_supported_cpuid, | |
f5f48ee1 SY |
10833 | |
10834 | .has_wbinvd_exit = cpu_has_vmx_wbinvd_exit, | |
99e3e30a | 10835 | |
ba904635 | 10836 | .read_tsc_offset = vmx_read_tsc_offset, |
99e3e30a | 10837 | .write_tsc_offset = vmx_write_tsc_offset, |
58ea6767 | 10838 | .adjust_tsc_offset_guest = vmx_adjust_tsc_offset_guest, |
d5c1785d | 10839 | .read_l1_tsc = vmx_read_l1_tsc, |
1c97f0a0 JR |
10840 | |
10841 | .set_tdp_cr3 = vmx_set_cr3, | |
8a76d7f2 JR |
10842 | |
10843 | .check_intercept = vmx_check_intercept, | |
a547c6db | 10844 | .handle_external_intr = vmx_handle_external_intr, |
da8999d3 | 10845 | .mpx_supported = vmx_mpx_supported, |
55412b2e | 10846 | .xsaves_supported = vmx_xsaves_supported, |
b6b8a145 JK |
10847 | |
10848 | .check_nested_events = vmx_check_nested_events, | |
ae97a3b8 RK |
10849 | |
10850 | .sched_in = vmx_sched_in, | |
843e4330 KH |
10851 | |
10852 | .slot_enable_log_dirty = vmx_slot_enable_log_dirty, | |
10853 | .slot_disable_log_dirty = vmx_slot_disable_log_dirty, | |
10854 | .flush_log_dirty = vmx_flush_log_dirty, | |
10855 | .enable_log_dirty_pt_masked = vmx_enable_log_dirty_pt_masked, | |
25462f7f | 10856 | |
bf9f6ac8 FW |
10857 | .pre_block = vmx_pre_block, |
10858 | .post_block = vmx_post_block, | |
10859 | ||
25462f7f | 10860 | .pmu_ops = &intel_pmu_ops, |
efc64404 FW |
10861 | |
10862 | .update_pi_irte = vmx_update_pi_irte, | |
6aa8b732 AK |
10863 | }; |
10864 | ||
10865 | static int __init vmx_init(void) | |
10866 | { | |
34a1cd60 TC |
10867 | int r = kvm_init(&vmx_x86_ops, sizeof(struct vcpu_vmx), |
10868 | __alignof__(struct vcpu_vmx), THIS_MODULE); | |
fdef3ad1 | 10869 | if (r) |
34a1cd60 | 10870 | return r; |
25c5f225 | 10871 | |
2965faa5 | 10872 | #ifdef CONFIG_KEXEC_CORE |
8f536b76 ZY |
10873 | rcu_assign_pointer(crash_vmclear_loaded_vmcss, |
10874 | crash_vmclear_local_loaded_vmcss); | |
10875 | #endif | |
10876 | ||
fdef3ad1 | 10877 | return 0; |
6aa8b732 AK |
10878 | } |
10879 | ||
10880 | static void __exit vmx_exit(void) | |
10881 | { | |
2965faa5 | 10882 | #ifdef CONFIG_KEXEC_CORE |
3b63a43f | 10883 | RCU_INIT_POINTER(crash_vmclear_loaded_vmcss, NULL); |
8f536b76 ZY |
10884 | synchronize_rcu(); |
10885 | #endif | |
10886 | ||
cb498ea2 | 10887 | kvm_exit(); |
6aa8b732 AK |
10888 | } |
10889 | ||
10890 | module_init(vmx_init) | |
10891 | module_exit(vmx_exit) |