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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" |
e495606d | 21 | |
edf88417 | 22 | #include <linux/kvm_host.h> |
6aa8b732 | 23 | #include <linux/module.h> |
9d8f549d | 24 | #include <linux/kernel.h> |
6aa8b732 AK |
25 | #include <linux/mm.h> |
26 | #include <linux/highmem.h> | |
e8edc6e0 | 27 | #include <linux/sched.h> |
c7addb90 | 28 | #include <linux/moduleparam.h> |
229456fc | 29 | #include <linux/ftrace_event.h> |
5a0e3ad6 | 30 | #include <linux/slab.h> |
cafd6659 | 31 | #include <linux/tboot.h> |
5fdbf976 | 32 | #include "kvm_cache_regs.h" |
35920a35 | 33 | #include "x86.h" |
e495606d | 34 | |
6aa8b732 | 35 | #include <asm/io.h> |
3b3be0d1 | 36 | #include <asm/desc.h> |
13673a90 | 37 | #include <asm/vmx.h> |
6210e37b | 38 | #include <asm/virtext.h> |
a0861c02 | 39 | #include <asm/mce.h> |
2acf923e DC |
40 | #include <asm/i387.h> |
41 | #include <asm/xcr.h> | |
6aa8b732 | 42 | |
229456fc MT |
43 | #include "trace.h" |
44 | ||
4ecac3fd | 45 | #define __ex(x) __kvm_handle_fault_on_reboot(x) |
5e520e62 AK |
46 | #define __ex_clear(x, reg) \ |
47 | ____kvm_handle_fault_on_reboot(x, "xor " reg " , " reg) | |
4ecac3fd | 48 | |
6aa8b732 AK |
49 | MODULE_AUTHOR("Qumranet"); |
50 | MODULE_LICENSE("GPL"); | |
51 | ||
4462d21a | 52 | static int __read_mostly bypass_guest_pf = 1; |
c1f8bc04 | 53 | module_param(bypass_guest_pf, bool, S_IRUGO); |
c7addb90 | 54 | |
4462d21a | 55 | static int __read_mostly enable_vpid = 1; |
736caefe | 56 | module_param_named(vpid, enable_vpid, bool, 0444); |
2384d2b3 | 57 | |
4462d21a | 58 | static int __read_mostly flexpriority_enabled = 1; |
736caefe | 59 | module_param_named(flexpriority, flexpriority_enabled, bool, S_IRUGO); |
4c9fc8ef | 60 | |
4462d21a | 61 | static int __read_mostly enable_ept = 1; |
736caefe | 62 | module_param_named(ept, enable_ept, bool, S_IRUGO); |
d56f546d | 63 | |
3a624e29 NK |
64 | static int __read_mostly enable_unrestricted_guest = 1; |
65 | module_param_named(unrestricted_guest, | |
66 | enable_unrestricted_guest, bool, S_IRUGO); | |
67 | ||
4462d21a | 68 | static int __read_mostly emulate_invalid_guest_state = 0; |
c1f8bc04 | 69 | module_param(emulate_invalid_guest_state, bool, S_IRUGO); |
04fa4d32 | 70 | |
b923e62e DX |
71 | static int __read_mostly vmm_exclusive = 1; |
72 | module_param(vmm_exclusive, bool, S_IRUGO); | |
73 | ||
443381a8 AL |
74 | static int __read_mostly yield_on_hlt = 1; |
75 | module_param(yield_on_hlt, bool, S_IRUGO); | |
76 | ||
801d3424 NHE |
77 | /* |
78 | * If nested=1, nested virtualization is supported, i.e., guests may use | |
79 | * VMX and be a hypervisor for its own guests. If nested=0, guests may not | |
80 | * use VMX instructions. | |
81 | */ | |
82 | static int __read_mostly nested = 0; | |
83 | module_param(nested, bool, S_IRUGO); | |
84 | ||
cdc0e244 AK |
85 | #define KVM_GUEST_CR0_MASK_UNRESTRICTED_GUEST \ |
86 | (X86_CR0_WP | X86_CR0_NE | X86_CR0_NW | X86_CR0_CD) | |
87 | #define KVM_GUEST_CR0_MASK \ | |
88 | (KVM_GUEST_CR0_MASK_UNRESTRICTED_GUEST | X86_CR0_PG | X86_CR0_PE) | |
89 | #define KVM_VM_CR0_ALWAYS_ON_UNRESTRICTED_GUEST \ | |
81231c69 | 90 | (X86_CR0_WP | X86_CR0_NE) |
cdc0e244 AK |
91 | #define KVM_VM_CR0_ALWAYS_ON \ |
92 | (KVM_VM_CR0_ALWAYS_ON_UNRESTRICTED_GUEST | X86_CR0_PG | X86_CR0_PE) | |
4c38609a AK |
93 | #define KVM_CR4_GUEST_OWNED_BITS \ |
94 | (X86_CR4_PVI | X86_CR4_DE | X86_CR4_PCE | X86_CR4_OSFXSR \ | |
95 | | X86_CR4_OSXMMEXCPT) | |
96 | ||
cdc0e244 AK |
97 | #define KVM_PMODE_VM_CR4_ALWAYS_ON (X86_CR4_PAE | X86_CR4_VMXE) |
98 | #define KVM_RMODE_VM_CR4_ALWAYS_ON (X86_CR4_VME | X86_CR4_PAE | X86_CR4_VMXE) | |
99 | ||
78ac8b47 AK |
100 | #define RMODE_GUEST_OWNED_EFLAGS_BITS (~(X86_EFLAGS_IOPL | X86_EFLAGS_VM)) |
101 | ||
4b8d54f9 ZE |
102 | /* |
103 | * These 2 parameters are used to config the controls for Pause-Loop Exiting: | |
104 | * ple_gap: upper bound on the amount of time between two successive | |
105 | * executions of PAUSE in a loop. Also indicate if ple enabled. | |
00c25bce | 106 | * According to test, this time is usually smaller than 128 cycles. |
4b8d54f9 ZE |
107 | * ple_window: upper bound on the amount of time a guest is allowed to execute |
108 | * in a PAUSE loop. Tests indicate that most spinlocks are held for | |
109 | * less than 2^12 cycles | |
110 | * Time is measured based on a counter that runs at the same rate as the TSC, | |
111 | * refer SDM volume 3b section 21.6.13 & 22.1.3. | |
112 | */ | |
00c25bce | 113 | #define KVM_VMX_DEFAULT_PLE_GAP 128 |
4b8d54f9 ZE |
114 | #define KVM_VMX_DEFAULT_PLE_WINDOW 4096 |
115 | static int ple_gap = KVM_VMX_DEFAULT_PLE_GAP; | |
116 | module_param(ple_gap, int, S_IRUGO); | |
117 | ||
118 | static int ple_window = KVM_VMX_DEFAULT_PLE_WINDOW; | |
119 | module_param(ple_window, int, S_IRUGO); | |
120 | ||
61d2ef2c | 121 | #define NR_AUTOLOAD_MSRS 1 |
ff2f6fe9 | 122 | #define VMCS02_POOL_SIZE 1 |
61d2ef2c | 123 | |
a2fa3e9f GH |
124 | struct vmcs { |
125 | u32 revision_id; | |
126 | u32 abort; | |
127 | char data[0]; | |
128 | }; | |
129 | ||
d462b819 NHE |
130 | /* |
131 | * Track a VMCS that may be loaded on a certain CPU. If it is (cpu!=-1), also | |
132 | * remember whether it was VMLAUNCHed, and maintain a linked list of all VMCSs | |
133 | * loaded on this CPU (so we can clear them if the CPU goes down). | |
134 | */ | |
135 | struct loaded_vmcs { | |
136 | struct vmcs *vmcs; | |
137 | int cpu; | |
138 | int launched; | |
139 | struct list_head loaded_vmcss_on_cpu_link; | |
140 | }; | |
141 | ||
26bb0981 AK |
142 | struct shared_msr_entry { |
143 | unsigned index; | |
144 | u64 data; | |
d5696725 | 145 | u64 mask; |
26bb0981 AK |
146 | }; |
147 | ||
a9d30f33 NHE |
148 | /* |
149 | * struct vmcs12 describes the state that our guest hypervisor (L1) keeps for a | |
150 | * single nested guest (L2), hence the name vmcs12. Any VMX implementation has | |
151 | * a VMCS structure, and vmcs12 is our emulated VMX's VMCS. This structure is | |
152 | * stored in guest memory specified by VMPTRLD, but is opaque to the guest, | |
153 | * which must access it using VMREAD/VMWRITE/VMCLEAR instructions. | |
154 | * More than one of these structures may exist, if L1 runs multiple L2 guests. | |
155 | * nested_vmx_run() will use the data here to build a vmcs02: a VMCS for the | |
156 | * underlying hardware which will be used to run L2. | |
157 | * This structure is packed to ensure that its layout is identical across | |
158 | * machines (necessary for live migration). | |
159 | * If there are changes in this struct, VMCS12_REVISION must be changed. | |
160 | */ | |
22bd0358 | 161 | typedef u64 natural_width; |
a9d30f33 NHE |
162 | struct __packed vmcs12 { |
163 | /* According to the Intel spec, a VMCS region must start with the | |
164 | * following two fields. Then follow implementation-specific data. | |
165 | */ | |
166 | u32 revision_id; | |
167 | u32 abort; | |
22bd0358 | 168 | |
27d6c865 NHE |
169 | u32 launch_state; /* set to 0 by VMCLEAR, to 1 by VMLAUNCH */ |
170 | u32 padding[7]; /* room for future expansion */ | |
171 | ||
22bd0358 NHE |
172 | u64 io_bitmap_a; |
173 | u64 io_bitmap_b; | |
174 | u64 msr_bitmap; | |
175 | u64 vm_exit_msr_store_addr; | |
176 | u64 vm_exit_msr_load_addr; | |
177 | u64 vm_entry_msr_load_addr; | |
178 | u64 tsc_offset; | |
179 | u64 virtual_apic_page_addr; | |
180 | u64 apic_access_addr; | |
181 | u64 ept_pointer; | |
182 | u64 guest_physical_address; | |
183 | u64 vmcs_link_pointer; | |
184 | u64 guest_ia32_debugctl; | |
185 | u64 guest_ia32_pat; | |
186 | u64 guest_ia32_efer; | |
187 | u64 guest_ia32_perf_global_ctrl; | |
188 | u64 guest_pdptr0; | |
189 | u64 guest_pdptr1; | |
190 | u64 guest_pdptr2; | |
191 | u64 guest_pdptr3; | |
192 | u64 host_ia32_pat; | |
193 | u64 host_ia32_efer; | |
194 | u64 host_ia32_perf_global_ctrl; | |
195 | u64 padding64[8]; /* room for future expansion */ | |
196 | /* | |
197 | * To allow migration of L1 (complete with its L2 guests) between | |
198 | * machines of different natural widths (32 or 64 bit), we cannot have | |
199 | * unsigned long fields with no explict size. We use u64 (aliased | |
200 | * natural_width) instead. Luckily, x86 is little-endian. | |
201 | */ | |
202 | natural_width cr0_guest_host_mask; | |
203 | natural_width cr4_guest_host_mask; | |
204 | natural_width cr0_read_shadow; | |
205 | natural_width cr4_read_shadow; | |
206 | natural_width cr3_target_value0; | |
207 | natural_width cr3_target_value1; | |
208 | natural_width cr3_target_value2; | |
209 | natural_width cr3_target_value3; | |
210 | natural_width exit_qualification; | |
211 | natural_width guest_linear_address; | |
212 | natural_width guest_cr0; | |
213 | natural_width guest_cr3; | |
214 | natural_width guest_cr4; | |
215 | natural_width guest_es_base; | |
216 | natural_width guest_cs_base; | |
217 | natural_width guest_ss_base; | |
218 | natural_width guest_ds_base; | |
219 | natural_width guest_fs_base; | |
220 | natural_width guest_gs_base; | |
221 | natural_width guest_ldtr_base; | |
222 | natural_width guest_tr_base; | |
223 | natural_width guest_gdtr_base; | |
224 | natural_width guest_idtr_base; | |
225 | natural_width guest_dr7; | |
226 | natural_width guest_rsp; | |
227 | natural_width guest_rip; | |
228 | natural_width guest_rflags; | |
229 | natural_width guest_pending_dbg_exceptions; | |
230 | natural_width guest_sysenter_esp; | |
231 | natural_width guest_sysenter_eip; | |
232 | natural_width host_cr0; | |
233 | natural_width host_cr3; | |
234 | natural_width host_cr4; | |
235 | natural_width host_fs_base; | |
236 | natural_width host_gs_base; | |
237 | natural_width host_tr_base; | |
238 | natural_width host_gdtr_base; | |
239 | natural_width host_idtr_base; | |
240 | natural_width host_ia32_sysenter_esp; | |
241 | natural_width host_ia32_sysenter_eip; | |
242 | natural_width host_rsp; | |
243 | natural_width host_rip; | |
244 | natural_width paddingl[8]; /* room for future expansion */ | |
245 | u32 pin_based_vm_exec_control; | |
246 | u32 cpu_based_vm_exec_control; | |
247 | u32 exception_bitmap; | |
248 | u32 page_fault_error_code_mask; | |
249 | u32 page_fault_error_code_match; | |
250 | u32 cr3_target_count; | |
251 | u32 vm_exit_controls; | |
252 | u32 vm_exit_msr_store_count; | |
253 | u32 vm_exit_msr_load_count; | |
254 | u32 vm_entry_controls; | |
255 | u32 vm_entry_msr_load_count; | |
256 | u32 vm_entry_intr_info_field; | |
257 | u32 vm_entry_exception_error_code; | |
258 | u32 vm_entry_instruction_len; | |
259 | u32 tpr_threshold; | |
260 | u32 secondary_vm_exec_control; | |
261 | u32 vm_instruction_error; | |
262 | u32 vm_exit_reason; | |
263 | u32 vm_exit_intr_info; | |
264 | u32 vm_exit_intr_error_code; | |
265 | u32 idt_vectoring_info_field; | |
266 | u32 idt_vectoring_error_code; | |
267 | u32 vm_exit_instruction_len; | |
268 | u32 vmx_instruction_info; | |
269 | u32 guest_es_limit; | |
270 | u32 guest_cs_limit; | |
271 | u32 guest_ss_limit; | |
272 | u32 guest_ds_limit; | |
273 | u32 guest_fs_limit; | |
274 | u32 guest_gs_limit; | |
275 | u32 guest_ldtr_limit; | |
276 | u32 guest_tr_limit; | |
277 | u32 guest_gdtr_limit; | |
278 | u32 guest_idtr_limit; | |
279 | u32 guest_es_ar_bytes; | |
280 | u32 guest_cs_ar_bytes; | |
281 | u32 guest_ss_ar_bytes; | |
282 | u32 guest_ds_ar_bytes; | |
283 | u32 guest_fs_ar_bytes; | |
284 | u32 guest_gs_ar_bytes; | |
285 | u32 guest_ldtr_ar_bytes; | |
286 | u32 guest_tr_ar_bytes; | |
287 | u32 guest_interruptibility_info; | |
288 | u32 guest_activity_state; | |
289 | u32 guest_sysenter_cs; | |
290 | u32 host_ia32_sysenter_cs; | |
291 | u32 padding32[8]; /* room for future expansion */ | |
292 | u16 virtual_processor_id; | |
293 | u16 guest_es_selector; | |
294 | u16 guest_cs_selector; | |
295 | u16 guest_ss_selector; | |
296 | u16 guest_ds_selector; | |
297 | u16 guest_fs_selector; | |
298 | u16 guest_gs_selector; | |
299 | u16 guest_ldtr_selector; | |
300 | u16 guest_tr_selector; | |
301 | u16 host_es_selector; | |
302 | u16 host_cs_selector; | |
303 | u16 host_ss_selector; | |
304 | u16 host_ds_selector; | |
305 | u16 host_fs_selector; | |
306 | u16 host_gs_selector; | |
307 | u16 host_tr_selector; | |
a9d30f33 NHE |
308 | }; |
309 | ||
310 | /* | |
311 | * VMCS12_REVISION is an arbitrary id that should be changed if the content or | |
312 | * layout of struct vmcs12 is changed. MSR_IA32_VMX_BASIC returns this id, and | |
313 | * VMPTRLD verifies that the VMCS region that L1 is loading contains this id. | |
314 | */ | |
315 | #define VMCS12_REVISION 0x11e57ed0 | |
316 | ||
317 | /* | |
318 | * VMCS12_SIZE is the number of bytes L1 should allocate for the VMXON region | |
319 | * and any VMCS region. Although only sizeof(struct vmcs12) are used by the | |
320 | * current implementation, 4K are reserved to avoid future complications. | |
321 | */ | |
322 | #define VMCS12_SIZE 0x1000 | |
323 | ||
ff2f6fe9 NHE |
324 | /* Used to remember the last vmcs02 used for some recently used vmcs12s */ |
325 | struct vmcs02_list { | |
326 | struct list_head list; | |
327 | gpa_t vmptr; | |
328 | struct loaded_vmcs vmcs02; | |
329 | }; | |
330 | ||
ec378aee NHE |
331 | /* |
332 | * The nested_vmx structure is part of vcpu_vmx, and holds information we need | |
333 | * for correct emulation of VMX (i.e., nested VMX) on this vcpu. | |
334 | */ | |
335 | struct nested_vmx { | |
336 | /* Has the level1 guest done vmxon? */ | |
337 | bool vmxon; | |
a9d30f33 NHE |
338 | |
339 | /* The guest-physical address of the current VMCS L1 keeps for L2 */ | |
340 | gpa_t current_vmptr; | |
341 | /* The host-usable pointer to the above */ | |
342 | struct page *current_vmcs12_page; | |
343 | struct vmcs12 *current_vmcs12; | |
ff2f6fe9 NHE |
344 | |
345 | /* vmcs02_list cache of VMCSs recently used to run L2 guests */ | |
346 | struct list_head vmcs02_pool; | |
347 | int vmcs02_num; | |
ec378aee NHE |
348 | }; |
349 | ||
a2fa3e9f | 350 | struct vcpu_vmx { |
fb3f0f51 | 351 | struct kvm_vcpu vcpu; |
313dbd49 | 352 | unsigned long host_rsp; |
29bd8a78 | 353 | u8 fail; |
69c73028 | 354 | u8 cpl; |
9d58b931 | 355 | bool nmi_known_unmasked; |
51aa01d1 | 356 | u32 exit_intr_info; |
1155f76a | 357 | u32 idt_vectoring_info; |
6de12732 | 358 | ulong rflags; |
26bb0981 | 359 | struct shared_msr_entry *guest_msrs; |
a2fa3e9f GH |
360 | int nmsrs; |
361 | int save_nmsrs; | |
a2fa3e9f | 362 | #ifdef CONFIG_X86_64 |
44ea2b17 AK |
363 | u64 msr_host_kernel_gs_base; |
364 | u64 msr_guest_kernel_gs_base; | |
a2fa3e9f | 365 | #endif |
d462b819 NHE |
366 | /* |
367 | * loaded_vmcs points to the VMCS currently used in this vcpu. For a | |
368 | * non-nested (L1) guest, it always points to vmcs01. For a nested | |
369 | * guest (L2), it points to a different VMCS. | |
370 | */ | |
371 | struct loaded_vmcs vmcs01; | |
372 | struct loaded_vmcs *loaded_vmcs; | |
373 | bool __launched; /* temporary, used in vmx_vcpu_run */ | |
61d2ef2c AK |
374 | struct msr_autoload { |
375 | unsigned nr; | |
376 | struct vmx_msr_entry guest[NR_AUTOLOAD_MSRS]; | |
377 | struct vmx_msr_entry host[NR_AUTOLOAD_MSRS]; | |
378 | } msr_autoload; | |
a2fa3e9f GH |
379 | struct { |
380 | int loaded; | |
381 | u16 fs_sel, gs_sel, ldt_sel; | |
152d3f2f LV |
382 | int gs_ldt_reload_needed; |
383 | int fs_reload_needed; | |
d77c26fc | 384 | } host_state; |
9c8cba37 | 385 | struct { |
7ffd92c5 | 386 | int vm86_active; |
78ac8b47 | 387 | ulong save_rflags; |
7ffd92c5 AK |
388 | struct kvm_save_segment { |
389 | u16 selector; | |
390 | unsigned long base; | |
391 | u32 limit; | |
392 | u32 ar; | |
393 | } tr, es, ds, fs, gs; | |
9c8cba37 | 394 | } rmode; |
2fb92db1 AK |
395 | struct { |
396 | u32 bitmask; /* 4 bits per segment (1 bit per field) */ | |
397 | struct kvm_save_segment seg[8]; | |
398 | } segment_cache; | |
2384d2b3 | 399 | int vpid; |
04fa4d32 | 400 | bool emulation_required; |
3b86cd99 JK |
401 | |
402 | /* Support for vnmi-less CPUs */ | |
403 | int soft_vnmi_blocked; | |
404 | ktime_t entry_time; | |
405 | s64 vnmi_blocked_time; | |
a0861c02 | 406 | u32 exit_reason; |
4e47c7a6 SY |
407 | |
408 | bool rdtscp_enabled; | |
ec378aee NHE |
409 | |
410 | /* Support for a guest hypervisor (nested VMX) */ | |
411 | struct nested_vmx nested; | |
a2fa3e9f GH |
412 | }; |
413 | ||
2fb92db1 AK |
414 | enum segment_cache_field { |
415 | SEG_FIELD_SEL = 0, | |
416 | SEG_FIELD_BASE = 1, | |
417 | SEG_FIELD_LIMIT = 2, | |
418 | SEG_FIELD_AR = 3, | |
419 | ||
420 | SEG_FIELD_NR = 4 | |
421 | }; | |
422 | ||
a2fa3e9f GH |
423 | static inline struct vcpu_vmx *to_vmx(struct kvm_vcpu *vcpu) |
424 | { | |
fb3f0f51 | 425 | return container_of(vcpu, struct vcpu_vmx, vcpu); |
a2fa3e9f GH |
426 | } |
427 | ||
22bd0358 NHE |
428 | #define VMCS12_OFFSET(x) offsetof(struct vmcs12, x) |
429 | #define FIELD(number, name) [number] = VMCS12_OFFSET(name) | |
430 | #define FIELD64(number, name) [number] = VMCS12_OFFSET(name), \ | |
431 | [number##_HIGH] = VMCS12_OFFSET(name)+4 | |
432 | ||
433 | static unsigned short vmcs_field_to_offset_table[] = { | |
434 | FIELD(VIRTUAL_PROCESSOR_ID, virtual_processor_id), | |
435 | FIELD(GUEST_ES_SELECTOR, guest_es_selector), | |
436 | FIELD(GUEST_CS_SELECTOR, guest_cs_selector), | |
437 | FIELD(GUEST_SS_SELECTOR, guest_ss_selector), | |
438 | FIELD(GUEST_DS_SELECTOR, guest_ds_selector), | |
439 | FIELD(GUEST_FS_SELECTOR, guest_fs_selector), | |
440 | FIELD(GUEST_GS_SELECTOR, guest_gs_selector), | |
441 | FIELD(GUEST_LDTR_SELECTOR, guest_ldtr_selector), | |
442 | FIELD(GUEST_TR_SELECTOR, guest_tr_selector), | |
443 | FIELD(HOST_ES_SELECTOR, host_es_selector), | |
444 | FIELD(HOST_CS_SELECTOR, host_cs_selector), | |
445 | FIELD(HOST_SS_SELECTOR, host_ss_selector), | |
446 | FIELD(HOST_DS_SELECTOR, host_ds_selector), | |
447 | FIELD(HOST_FS_SELECTOR, host_fs_selector), | |
448 | FIELD(HOST_GS_SELECTOR, host_gs_selector), | |
449 | FIELD(HOST_TR_SELECTOR, host_tr_selector), | |
450 | FIELD64(IO_BITMAP_A, io_bitmap_a), | |
451 | FIELD64(IO_BITMAP_B, io_bitmap_b), | |
452 | FIELD64(MSR_BITMAP, msr_bitmap), | |
453 | FIELD64(VM_EXIT_MSR_STORE_ADDR, vm_exit_msr_store_addr), | |
454 | FIELD64(VM_EXIT_MSR_LOAD_ADDR, vm_exit_msr_load_addr), | |
455 | FIELD64(VM_ENTRY_MSR_LOAD_ADDR, vm_entry_msr_load_addr), | |
456 | FIELD64(TSC_OFFSET, tsc_offset), | |
457 | FIELD64(VIRTUAL_APIC_PAGE_ADDR, virtual_apic_page_addr), | |
458 | FIELD64(APIC_ACCESS_ADDR, apic_access_addr), | |
459 | FIELD64(EPT_POINTER, ept_pointer), | |
460 | FIELD64(GUEST_PHYSICAL_ADDRESS, guest_physical_address), | |
461 | FIELD64(VMCS_LINK_POINTER, vmcs_link_pointer), | |
462 | FIELD64(GUEST_IA32_DEBUGCTL, guest_ia32_debugctl), | |
463 | FIELD64(GUEST_IA32_PAT, guest_ia32_pat), | |
464 | FIELD64(GUEST_IA32_EFER, guest_ia32_efer), | |
465 | FIELD64(GUEST_IA32_PERF_GLOBAL_CTRL, guest_ia32_perf_global_ctrl), | |
466 | FIELD64(GUEST_PDPTR0, guest_pdptr0), | |
467 | FIELD64(GUEST_PDPTR1, guest_pdptr1), | |
468 | FIELD64(GUEST_PDPTR2, guest_pdptr2), | |
469 | FIELD64(GUEST_PDPTR3, guest_pdptr3), | |
470 | FIELD64(HOST_IA32_PAT, host_ia32_pat), | |
471 | FIELD64(HOST_IA32_EFER, host_ia32_efer), | |
472 | FIELD64(HOST_IA32_PERF_GLOBAL_CTRL, host_ia32_perf_global_ctrl), | |
473 | FIELD(PIN_BASED_VM_EXEC_CONTROL, pin_based_vm_exec_control), | |
474 | FIELD(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control), | |
475 | FIELD(EXCEPTION_BITMAP, exception_bitmap), | |
476 | FIELD(PAGE_FAULT_ERROR_CODE_MASK, page_fault_error_code_mask), | |
477 | FIELD(PAGE_FAULT_ERROR_CODE_MATCH, page_fault_error_code_match), | |
478 | FIELD(CR3_TARGET_COUNT, cr3_target_count), | |
479 | FIELD(VM_EXIT_CONTROLS, vm_exit_controls), | |
480 | FIELD(VM_EXIT_MSR_STORE_COUNT, vm_exit_msr_store_count), | |
481 | FIELD(VM_EXIT_MSR_LOAD_COUNT, vm_exit_msr_load_count), | |
482 | FIELD(VM_ENTRY_CONTROLS, vm_entry_controls), | |
483 | FIELD(VM_ENTRY_MSR_LOAD_COUNT, vm_entry_msr_load_count), | |
484 | FIELD(VM_ENTRY_INTR_INFO_FIELD, vm_entry_intr_info_field), | |
485 | FIELD(VM_ENTRY_EXCEPTION_ERROR_CODE, vm_entry_exception_error_code), | |
486 | FIELD(VM_ENTRY_INSTRUCTION_LEN, vm_entry_instruction_len), | |
487 | FIELD(TPR_THRESHOLD, tpr_threshold), | |
488 | FIELD(SECONDARY_VM_EXEC_CONTROL, secondary_vm_exec_control), | |
489 | FIELD(VM_INSTRUCTION_ERROR, vm_instruction_error), | |
490 | FIELD(VM_EXIT_REASON, vm_exit_reason), | |
491 | FIELD(VM_EXIT_INTR_INFO, vm_exit_intr_info), | |
492 | FIELD(VM_EXIT_INTR_ERROR_CODE, vm_exit_intr_error_code), | |
493 | FIELD(IDT_VECTORING_INFO_FIELD, idt_vectoring_info_field), | |
494 | FIELD(IDT_VECTORING_ERROR_CODE, idt_vectoring_error_code), | |
495 | FIELD(VM_EXIT_INSTRUCTION_LEN, vm_exit_instruction_len), | |
496 | FIELD(VMX_INSTRUCTION_INFO, vmx_instruction_info), | |
497 | FIELD(GUEST_ES_LIMIT, guest_es_limit), | |
498 | FIELD(GUEST_CS_LIMIT, guest_cs_limit), | |
499 | FIELD(GUEST_SS_LIMIT, guest_ss_limit), | |
500 | FIELD(GUEST_DS_LIMIT, guest_ds_limit), | |
501 | FIELD(GUEST_FS_LIMIT, guest_fs_limit), | |
502 | FIELD(GUEST_GS_LIMIT, guest_gs_limit), | |
503 | FIELD(GUEST_LDTR_LIMIT, guest_ldtr_limit), | |
504 | FIELD(GUEST_TR_LIMIT, guest_tr_limit), | |
505 | FIELD(GUEST_GDTR_LIMIT, guest_gdtr_limit), | |
506 | FIELD(GUEST_IDTR_LIMIT, guest_idtr_limit), | |
507 | FIELD(GUEST_ES_AR_BYTES, guest_es_ar_bytes), | |
508 | FIELD(GUEST_CS_AR_BYTES, guest_cs_ar_bytes), | |
509 | FIELD(GUEST_SS_AR_BYTES, guest_ss_ar_bytes), | |
510 | FIELD(GUEST_DS_AR_BYTES, guest_ds_ar_bytes), | |
511 | FIELD(GUEST_FS_AR_BYTES, guest_fs_ar_bytes), | |
512 | FIELD(GUEST_GS_AR_BYTES, guest_gs_ar_bytes), | |
513 | FIELD(GUEST_LDTR_AR_BYTES, guest_ldtr_ar_bytes), | |
514 | FIELD(GUEST_TR_AR_BYTES, guest_tr_ar_bytes), | |
515 | FIELD(GUEST_INTERRUPTIBILITY_INFO, guest_interruptibility_info), | |
516 | FIELD(GUEST_ACTIVITY_STATE, guest_activity_state), | |
517 | FIELD(GUEST_SYSENTER_CS, guest_sysenter_cs), | |
518 | FIELD(HOST_IA32_SYSENTER_CS, host_ia32_sysenter_cs), | |
519 | FIELD(CR0_GUEST_HOST_MASK, cr0_guest_host_mask), | |
520 | FIELD(CR4_GUEST_HOST_MASK, cr4_guest_host_mask), | |
521 | FIELD(CR0_READ_SHADOW, cr0_read_shadow), | |
522 | FIELD(CR4_READ_SHADOW, cr4_read_shadow), | |
523 | FIELD(CR3_TARGET_VALUE0, cr3_target_value0), | |
524 | FIELD(CR3_TARGET_VALUE1, cr3_target_value1), | |
525 | FIELD(CR3_TARGET_VALUE2, cr3_target_value2), | |
526 | FIELD(CR3_TARGET_VALUE3, cr3_target_value3), | |
527 | FIELD(EXIT_QUALIFICATION, exit_qualification), | |
528 | FIELD(GUEST_LINEAR_ADDRESS, guest_linear_address), | |
529 | FIELD(GUEST_CR0, guest_cr0), | |
530 | FIELD(GUEST_CR3, guest_cr3), | |
531 | FIELD(GUEST_CR4, guest_cr4), | |
532 | FIELD(GUEST_ES_BASE, guest_es_base), | |
533 | FIELD(GUEST_CS_BASE, guest_cs_base), | |
534 | FIELD(GUEST_SS_BASE, guest_ss_base), | |
535 | FIELD(GUEST_DS_BASE, guest_ds_base), | |
536 | FIELD(GUEST_FS_BASE, guest_fs_base), | |
537 | FIELD(GUEST_GS_BASE, guest_gs_base), | |
538 | FIELD(GUEST_LDTR_BASE, guest_ldtr_base), | |
539 | FIELD(GUEST_TR_BASE, guest_tr_base), | |
540 | FIELD(GUEST_GDTR_BASE, guest_gdtr_base), | |
541 | FIELD(GUEST_IDTR_BASE, guest_idtr_base), | |
542 | FIELD(GUEST_DR7, guest_dr7), | |
543 | FIELD(GUEST_RSP, guest_rsp), | |
544 | FIELD(GUEST_RIP, guest_rip), | |
545 | FIELD(GUEST_RFLAGS, guest_rflags), | |
546 | FIELD(GUEST_PENDING_DBG_EXCEPTIONS, guest_pending_dbg_exceptions), | |
547 | FIELD(GUEST_SYSENTER_ESP, guest_sysenter_esp), | |
548 | FIELD(GUEST_SYSENTER_EIP, guest_sysenter_eip), | |
549 | FIELD(HOST_CR0, host_cr0), | |
550 | FIELD(HOST_CR3, host_cr3), | |
551 | FIELD(HOST_CR4, host_cr4), | |
552 | FIELD(HOST_FS_BASE, host_fs_base), | |
553 | FIELD(HOST_GS_BASE, host_gs_base), | |
554 | FIELD(HOST_TR_BASE, host_tr_base), | |
555 | FIELD(HOST_GDTR_BASE, host_gdtr_base), | |
556 | FIELD(HOST_IDTR_BASE, host_idtr_base), | |
557 | FIELD(HOST_IA32_SYSENTER_ESP, host_ia32_sysenter_esp), | |
558 | FIELD(HOST_IA32_SYSENTER_EIP, host_ia32_sysenter_eip), | |
559 | FIELD(HOST_RSP, host_rsp), | |
560 | FIELD(HOST_RIP, host_rip), | |
561 | }; | |
562 | static const int max_vmcs_field = ARRAY_SIZE(vmcs_field_to_offset_table); | |
563 | ||
564 | static inline short vmcs_field_to_offset(unsigned long field) | |
565 | { | |
566 | if (field >= max_vmcs_field || vmcs_field_to_offset_table[field] == 0) | |
567 | return -1; | |
568 | return vmcs_field_to_offset_table[field]; | |
569 | } | |
570 | ||
a9d30f33 NHE |
571 | static inline struct vmcs12 *get_vmcs12(struct kvm_vcpu *vcpu) |
572 | { | |
573 | return to_vmx(vcpu)->nested.current_vmcs12; | |
574 | } | |
575 | ||
576 | static struct page *nested_get_page(struct kvm_vcpu *vcpu, gpa_t addr) | |
577 | { | |
578 | struct page *page = gfn_to_page(vcpu->kvm, addr >> PAGE_SHIFT); | |
579 | if (is_error_page(page)) { | |
580 | kvm_release_page_clean(page); | |
581 | return NULL; | |
582 | } | |
583 | return page; | |
584 | } | |
585 | ||
586 | static void nested_release_page(struct page *page) | |
587 | { | |
588 | kvm_release_page_dirty(page); | |
589 | } | |
590 | ||
591 | static void nested_release_page_clean(struct page *page) | |
592 | { | |
593 | kvm_release_page_clean(page); | |
594 | } | |
595 | ||
4e1096d2 | 596 | static u64 construct_eptp(unsigned long root_hpa); |
4610c9cc DX |
597 | static void kvm_cpu_vmxon(u64 addr); |
598 | static void kvm_cpu_vmxoff(void); | |
aff48baa | 599 | static void vmx_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3); |
776e58ea | 600 | static int vmx_set_tss_addr(struct kvm *kvm, unsigned int addr); |
75880a01 | 601 | |
6aa8b732 AK |
602 | static DEFINE_PER_CPU(struct vmcs *, vmxarea); |
603 | static DEFINE_PER_CPU(struct vmcs *, current_vmcs); | |
d462b819 NHE |
604 | /* |
605 | * We maintain a per-CPU linked-list of VMCS loaded on that CPU. This is needed | |
606 | * when a CPU is brought down, and we need to VMCLEAR all VMCSs loaded on it. | |
607 | */ | |
608 | static DEFINE_PER_CPU(struct list_head, loaded_vmcss_on_cpu); | |
3444d7da | 609 | static DEFINE_PER_CPU(struct desc_ptr, host_gdt); |
6aa8b732 | 610 | |
3e7c73e9 AK |
611 | static unsigned long *vmx_io_bitmap_a; |
612 | static unsigned long *vmx_io_bitmap_b; | |
5897297b AK |
613 | static unsigned long *vmx_msr_bitmap_legacy; |
614 | static unsigned long *vmx_msr_bitmap_longmode; | |
fdef3ad1 | 615 | |
110312c8 AK |
616 | static bool cpu_has_load_ia32_efer; |
617 | ||
2384d2b3 SY |
618 | static DECLARE_BITMAP(vmx_vpid_bitmap, VMX_NR_VPIDS); |
619 | static DEFINE_SPINLOCK(vmx_vpid_lock); | |
620 | ||
1c3d14fe | 621 | static struct vmcs_config { |
6aa8b732 AK |
622 | int size; |
623 | int order; | |
624 | u32 revision_id; | |
1c3d14fe YS |
625 | u32 pin_based_exec_ctrl; |
626 | u32 cpu_based_exec_ctrl; | |
f78e0e2e | 627 | u32 cpu_based_2nd_exec_ctrl; |
1c3d14fe YS |
628 | u32 vmexit_ctrl; |
629 | u32 vmentry_ctrl; | |
630 | } vmcs_config; | |
6aa8b732 | 631 | |
efff9e53 | 632 | static struct vmx_capability { |
d56f546d SY |
633 | u32 ept; |
634 | u32 vpid; | |
635 | } vmx_capability; | |
636 | ||
6aa8b732 AK |
637 | #define VMX_SEGMENT_FIELD(seg) \ |
638 | [VCPU_SREG_##seg] = { \ | |
639 | .selector = GUEST_##seg##_SELECTOR, \ | |
640 | .base = GUEST_##seg##_BASE, \ | |
641 | .limit = GUEST_##seg##_LIMIT, \ | |
642 | .ar_bytes = GUEST_##seg##_AR_BYTES, \ | |
643 | } | |
644 | ||
645 | static struct kvm_vmx_segment_field { | |
646 | unsigned selector; | |
647 | unsigned base; | |
648 | unsigned limit; | |
649 | unsigned ar_bytes; | |
650 | } kvm_vmx_segment_fields[] = { | |
651 | VMX_SEGMENT_FIELD(CS), | |
652 | VMX_SEGMENT_FIELD(DS), | |
653 | VMX_SEGMENT_FIELD(ES), | |
654 | VMX_SEGMENT_FIELD(FS), | |
655 | VMX_SEGMENT_FIELD(GS), | |
656 | VMX_SEGMENT_FIELD(SS), | |
657 | VMX_SEGMENT_FIELD(TR), | |
658 | VMX_SEGMENT_FIELD(LDTR), | |
659 | }; | |
660 | ||
26bb0981 AK |
661 | static u64 host_efer; |
662 | ||
6de4f3ad AK |
663 | static void ept_save_pdptrs(struct kvm_vcpu *vcpu); |
664 | ||
4d56c8a7 | 665 | /* |
8c06585d | 666 | * Keep MSR_STAR at the end, as setup_msrs() will try to optimize it |
4d56c8a7 AK |
667 | * away by decrementing the array size. |
668 | */ | |
6aa8b732 | 669 | static const u32 vmx_msr_index[] = { |
05b3e0c2 | 670 | #ifdef CONFIG_X86_64 |
44ea2b17 | 671 | MSR_SYSCALL_MASK, MSR_LSTAR, MSR_CSTAR, |
6aa8b732 | 672 | #endif |
8c06585d | 673 | MSR_EFER, MSR_TSC_AUX, MSR_STAR, |
6aa8b732 | 674 | }; |
9d8f549d | 675 | #define NR_VMX_MSR ARRAY_SIZE(vmx_msr_index) |
6aa8b732 | 676 | |
31299944 | 677 | static inline bool is_page_fault(u32 intr_info) |
6aa8b732 AK |
678 | { |
679 | return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK | | |
680 | INTR_INFO_VALID_MASK)) == | |
8ab2d2e2 | 681 | (INTR_TYPE_HARD_EXCEPTION | PF_VECTOR | INTR_INFO_VALID_MASK); |
6aa8b732 AK |
682 | } |
683 | ||
31299944 | 684 | static inline bool is_no_device(u32 intr_info) |
2ab455cc AL |
685 | { |
686 | return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK | | |
687 | INTR_INFO_VALID_MASK)) == | |
8ab2d2e2 | 688 | (INTR_TYPE_HARD_EXCEPTION | NM_VECTOR | INTR_INFO_VALID_MASK); |
2ab455cc AL |
689 | } |
690 | ||
31299944 | 691 | static inline bool is_invalid_opcode(u32 intr_info) |
7aa81cc0 AL |
692 | { |
693 | return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK | | |
694 | INTR_INFO_VALID_MASK)) == | |
8ab2d2e2 | 695 | (INTR_TYPE_HARD_EXCEPTION | UD_VECTOR | INTR_INFO_VALID_MASK); |
7aa81cc0 AL |
696 | } |
697 | ||
31299944 | 698 | static inline bool is_external_interrupt(u32 intr_info) |
6aa8b732 AK |
699 | { |
700 | return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VALID_MASK)) | |
701 | == (INTR_TYPE_EXT_INTR | INTR_INFO_VALID_MASK); | |
702 | } | |
703 | ||
31299944 | 704 | static inline bool is_machine_check(u32 intr_info) |
a0861c02 AK |
705 | { |
706 | return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK | | |
707 | INTR_INFO_VALID_MASK)) == | |
708 | (INTR_TYPE_HARD_EXCEPTION | MC_VECTOR | INTR_INFO_VALID_MASK); | |
709 | } | |
710 | ||
31299944 | 711 | static inline bool cpu_has_vmx_msr_bitmap(void) |
25c5f225 | 712 | { |
04547156 | 713 | return vmcs_config.cpu_based_exec_ctrl & CPU_BASED_USE_MSR_BITMAPS; |
25c5f225 SY |
714 | } |
715 | ||
31299944 | 716 | static inline bool cpu_has_vmx_tpr_shadow(void) |
6e5d865c | 717 | { |
04547156 | 718 | return vmcs_config.cpu_based_exec_ctrl & CPU_BASED_TPR_SHADOW; |
6e5d865c YS |
719 | } |
720 | ||
31299944 | 721 | static inline bool vm_need_tpr_shadow(struct kvm *kvm) |
6e5d865c | 722 | { |
04547156 | 723 | return (cpu_has_vmx_tpr_shadow()) && (irqchip_in_kernel(kvm)); |
6e5d865c YS |
724 | } |
725 | ||
31299944 | 726 | static inline bool cpu_has_secondary_exec_ctrls(void) |
f78e0e2e | 727 | { |
04547156 SY |
728 | return vmcs_config.cpu_based_exec_ctrl & |
729 | CPU_BASED_ACTIVATE_SECONDARY_CONTROLS; | |
f78e0e2e SY |
730 | } |
731 | ||
774ead3a | 732 | static inline bool cpu_has_vmx_virtualize_apic_accesses(void) |
f78e0e2e | 733 | { |
04547156 SY |
734 | return vmcs_config.cpu_based_2nd_exec_ctrl & |
735 | SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES; | |
736 | } | |
737 | ||
738 | static inline bool cpu_has_vmx_flexpriority(void) | |
739 | { | |
740 | return cpu_has_vmx_tpr_shadow() && | |
741 | cpu_has_vmx_virtualize_apic_accesses(); | |
f78e0e2e SY |
742 | } |
743 | ||
e799794e MT |
744 | static inline bool cpu_has_vmx_ept_execute_only(void) |
745 | { | |
31299944 | 746 | return vmx_capability.ept & VMX_EPT_EXECUTE_ONLY_BIT; |
e799794e MT |
747 | } |
748 | ||
749 | static inline bool cpu_has_vmx_eptp_uncacheable(void) | |
750 | { | |
31299944 | 751 | return vmx_capability.ept & VMX_EPTP_UC_BIT; |
e799794e MT |
752 | } |
753 | ||
754 | static inline bool cpu_has_vmx_eptp_writeback(void) | |
755 | { | |
31299944 | 756 | return vmx_capability.ept & VMX_EPTP_WB_BIT; |
e799794e MT |
757 | } |
758 | ||
759 | static inline bool cpu_has_vmx_ept_2m_page(void) | |
760 | { | |
31299944 | 761 | return vmx_capability.ept & VMX_EPT_2MB_PAGE_BIT; |
e799794e MT |
762 | } |
763 | ||
878403b7 SY |
764 | static inline bool cpu_has_vmx_ept_1g_page(void) |
765 | { | |
31299944 | 766 | return vmx_capability.ept & VMX_EPT_1GB_PAGE_BIT; |
878403b7 SY |
767 | } |
768 | ||
4bc9b982 SY |
769 | static inline bool cpu_has_vmx_ept_4levels(void) |
770 | { | |
771 | return vmx_capability.ept & VMX_EPT_PAGE_WALK_4_BIT; | |
772 | } | |
773 | ||
31299944 | 774 | static inline bool cpu_has_vmx_invept_individual_addr(void) |
d56f546d | 775 | { |
31299944 | 776 | return vmx_capability.ept & VMX_EPT_EXTENT_INDIVIDUAL_BIT; |
d56f546d SY |
777 | } |
778 | ||
31299944 | 779 | static inline bool cpu_has_vmx_invept_context(void) |
d56f546d | 780 | { |
31299944 | 781 | return vmx_capability.ept & VMX_EPT_EXTENT_CONTEXT_BIT; |
d56f546d SY |
782 | } |
783 | ||
31299944 | 784 | static inline bool cpu_has_vmx_invept_global(void) |
d56f546d | 785 | { |
31299944 | 786 | return vmx_capability.ept & VMX_EPT_EXTENT_GLOBAL_BIT; |
d56f546d SY |
787 | } |
788 | ||
518c8aee GJ |
789 | static inline bool cpu_has_vmx_invvpid_single(void) |
790 | { | |
791 | return vmx_capability.vpid & VMX_VPID_EXTENT_SINGLE_CONTEXT_BIT; | |
792 | } | |
793 | ||
b9d762fa GJ |
794 | static inline bool cpu_has_vmx_invvpid_global(void) |
795 | { | |
796 | return vmx_capability.vpid & VMX_VPID_EXTENT_GLOBAL_CONTEXT_BIT; | |
797 | } | |
798 | ||
31299944 | 799 | static inline bool cpu_has_vmx_ept(void) |
d56f546d | 800 | { |
04547156 SY |
801 | return vmcs_config.cpu_based_2nd_exec_ctrl & |
802 | SECONDARY_EXEC_ENABLE_EPT; | |
d56f546d SY |
803 | } |
804 | ||
31299944 | 805 | static inline bool cpu_has_vmx_unrestricted_guest(void) |
3a624e29 NK |
806 | { |
807 | return vmcs_config.cpu_based_2nd_exec_ctrl & | |
808 | SECONDARY_EXEC_UNRESTRICTED_GUEST; | |
809 | } | |
810 | ||
31299944 | 811 | static inline bool cpu_has_vmx_ple(void) |
4b8d54f9 ZE |
812 | { |
813 | return vmcs_config.cpu_based_2nd_exec_ctrl & | |
814 | SECONDARY_EXEC_PAUSE_LOOP_EXITING; | |
815 | } | |
816 | ||
31299944 | 817 | static inline bool vm_need_virtualize_apic_accesses(struct kvm *kvm) |
f78e0e2e | 818 | { |
6d3e435e | 819 | return flexpriority_enabled && irqchip_in_kernel(kvm); |
f78e0e2e SY |
820 | } |
821 | ||
31299944 | 822 | static inline bool cpu_has_vmx_vpid(void) |
2384d2b3 | 823 | { |
04547156 SY |
824 | return vmcs_config.cpu_based_2nd_exec_ctrl & |
825 | SECONDARY_EXEC_ENABLE_VPID; | |
2384d2b3 SY |
826 | } |
827 | ||
31299944 | 828 | static inline bool cpu_has_vmx_rdtscp(void) |
4e47c7a6 SY |
829 | { |
830 | return vmcs_config.cpu_based_2nd_exec_ctrl & | |
831 | SECONDARY_EXEC_RDTSCP; | |
832 | } | |
833 | ||
31299944 | 834 | static inline bool cpu_has_virtual_nmis(void) |
f08864b4 SY |
835 | { |
836 | return vmcs_config.pin_based_exec_ctrl & PIN_BASED_VIRTUAL_NMIS; | |
837 | } | |
838 | ||
f5f48ee1 SY |
839 | static inline bool cpu_has_vmx_wbinvd_exit(void) |
840 | { | |
841 | return vmcs_config.cpu_based_2nd_exec_ctrl & | |
842 | SECONDARY_EXEC_WBINVD_EXITING; | |
843 | } | |
844 | ||
04547156 SY |
845 | static inline bool report_flexpriority(void) |
846 | { | |
847 | return flexpriority_enabled; | |
848 | } | |
849 | ||
8b9cf98c | 850 | static int __find_msr_index(struct vcpu_vmx *vmx, u32 msr) |
7725f0ba AK |
851 | { |
852 | int i; | |
853 | ||
a2fa3e9f | 854 | for (i = 0; i < vmx->nmsrs; ++i) |
26bb0981 | 855 | if (vmx_msr_index[vmx->guest_msrs[i].index] == msr) |
a75beee6 ED |
856 | return i; |
857 | return -1; | |
858 | } | |
859 | ||
2384d2b3 SY |
860 | static inline void __invvpid(int ext, u16 vpid, gva_t gva) |
861 | { | |
862 | struct { | |
863 | u64 vpid : 16; | |
864 | u64 rsvd : 48; | |
865 | u64 gva; | |
866 | } operand = { vpid, 0, gva }; | |
867 | ||
4ecac3fd | 868 | asm volatile (__ex(ASM_VMX_INVVPID) |
2384d2b3 SY |
869 | /* CF==1 or ZF==1 --> rc = -1 */ |
870 | "; ja 1f ; ud2 ; 1:" | |
871 | : : "a"(&operand), "c"(ext) : "cc", "memory"); | |
872 | } | |
873 | ||
1439442c SY |
874 | static inline void __invept(int ext, u64 eptp, gpa_t gpa) |
875 | { | |
876 | struct { | |
877 | u64 eptp, gpa; | |
878 | } operand = {eptp, gpa}; | |
879 | ||
4ecac3fd | 880 | asm volatile (__ex(ASM_VMX_INVEPT) |
1439442c SY |
881 | /* CF==1 or ZF==1 --> rc = -1 */ |
882 | "; ja 1f ; ud2 ; 1:\n" | |
883 | : : "a" (&operand), "c" (ext) : "cc", "memory"); | |
884 | } | |
885 | ||
26bb0981 | 886 | static struct shared_msr_entry *find_msr_entry(struct vcpu_vmx *vmx, u32 msr) |
a75beee6 ED |
887 | { |
888 | int i; | |
889 | ||
8b9cf98c | 890 | i = __find_msr_index(vmx, msr); |
a75beee6 | 891 | if (i >= 0) |
a2fa3e9f | 892 | return &vmx->guest_msrs[i]; |
8b6d44c7 | 893 | return NULL; |
7725f0ba AK |
894 | } |
895 | ||
6aa8b732 AK |
896 | static void vmcs_clear(struct vmcs *vmcs) |
897 | { | |
898 | u64 phys_addr = __pa(vmcs); | |
899 | u8 error; | |
900 | ||
4ecac3fd | 901 | asm volatile (__ex(ASM_VMX_VMCLEAR_RAX) "; setna %0" |
16d8f72f | 902 | : "=qm"(error) : "a"(&phys_addr), "m"(phys_addr) |
6aa8b732 AK |
903 | : "cc", "memory"); |
904 | if (error) | |
905 | printk(KERN_ERR "kvm: vmclear fail: %p/%llx\n", | |
906 | vmcs, phys_addr); | |
907 | } | |
908 | ||
d462b819 NHE |
909 | static inline void loaded_vmcs_init(struct loaded_vmcs *loaded_vmcs) |
910 | { | |
911 | vmcs_clear(loaded_vmcs->vmcs); | |
912 | loaded_vmcs->cpu = -1; | |
913 | loaded_vmcs->launched = 0; | |
914 | } | |
915 | ||
7725b894 DX |
916 | static void vmcs_load(struct vmcs *vmcs) |
917 | { | |
918 | u64 phys_addr = __pa(vmcs); | |
919 | u8 error; | |
920 | ||
921 | asm volatile (__ex(ASM_VMX_VMPTRLD_RAX) "; setna %0" | |
16d8f72f | 922 | : "=qm"(error) : "a"(&phys_addr), "m"(phys_addr) |
7725b894 DX |
923 | : "cc", "memory"); |
924 | if (error) | |
925 | printk(KERN_ERR "kvm: vmptrld %p/%llx fail\n", | |
926 | vmcs, phys_addr); | |
927 | } | |
928 | ||
d462b819 | 929 | static void __loaded_vmcs_clear(void *arg) |
6aa8b732 | 930 | { |
d462b819 | 931 | struct loaded_vmcs *loaded_vmcs = arg; |
d3b2c338 | 932 | int cpu = raw_smp_processor_id(); |
6aa8b732 | 933 | |
d462b819 NHE |
934 | if (loaded_vmcs->cpu != cpu) |
935 | return; /* vcpu migration can race with cpu offline */ | |
936 | if (per_cpu(current_vmcs, cpu) == loaded_vmcs->vmcs) | |
6aa8b732 | 937 | per_cpu(current_vmcs, cpu) = NULL; |
d462b819 NHE |
938 | list_del(&loaded_vmcs->loaded_vmcss_on_cpu_link); |
939 | loaded_vmcs_init(loaded_vmcs); | |
6aa8b732 AK |
940 | } |
941 | ||
d462b819 | 942 | static void loaded_vmcs_clear(struct loaded_vmcs *loaded_vmcs) |
8d0be2b3 | 943 | { |
d462b819 NHE |
944 | if (loaded_vmcs->cpu != -1) |
945 | smp_call_function_single( | |
946 | loaded_vmcs->cpu, __loaded_vmcs_clear, loaded_vmcs, 1); | |
8d0be2b3 AK |
947 | } |
948 | ||
1760dd49 | 949 | static inline void vpid_sync_vcpu_single(struct vcpu_vmx *vmx) |
2384d2b3 SY |
950 | { |
951 | if (vmx->vpid == 0) | |
952 | return; | |
953 | ||
518c8aee GJ |
954 | if (cpu_has_vmx_invvpid_single()) |
955 | __invvpid(VMX_VPID_EXTENT_SINGLE_CONTEXT, vmx->vpid, 0); | |
2384d2b3 SY |
956 | } |
957 | ||
b9d762fa GJ |
958 | static inline void vpid_sync_vcpu_global(void) |
959 | { | |
960 | if (cpu_has_vmx_invvpid_global()) | |
961 | __invvpid(VMX_VPID_EXTENT_ALL_CONTEXT, 0, 0); | |
962 | } | |
963 | ||
964 | static inline void vpid_sync_context(struct vcpu_vmx *vmx) | |
965 | { | |
966 | if (cpu_has_vmx_invvpid_single()) | |
1760dd49 | 967 | vpid_sync_vcpu_single(vmx); |
b9d762fa GJ |
968 | else |
969 | vpid_sync_vcpu_global(); | |
970 | } | |
971 | ||
1439442c SY |
972 | static inline void ept_sync_global(void) |
973 | { | |
974 | if (cpu_has_vmx_invept_global()) | |
975 | __invept(VMX_EPT_EXTENT_GLOBAL, 0, 0); | |
976 | } | |
977 | ||
978 | static inline void ept_sync_context(u64 eptp) | |
979 | { | |
089d034e | 980 | if (enable_ept) { |
1439442c SY |
981 | if (cpu_has_vmx_invept_context()) |
982 | __invept(VMX_EPT_EXTENT_CONTEXT, eptp, 0); | |
983 | else | |
984 | ept_sync_global(); | |
985 | } | |
986 | } | |
987 | ||
988 | static inline void ept_sync_individual_addr(u64 eptp, gpa_t gpa) | |
989 | { | |
089d034e | 990 | if (enable_ept) { |
1439442c SY |
991 | if (cpu_has_vmx_invept_individual_addr()) |
992 | __invept(VMX_EPT_EXTENT_INDIVIDUAL_ADDR, | |
993 | eptp, gpa); | |
994 | else | |
995 | ept_sync_context(eptp); | |
996 | } | |
997 | } | |
998 | ||
96304217 | 999 | static __always_inline unsigned long vmcs_readl(unsigned long field) |
6aa8b732 | 1000 | { |
5e520e62 | 1001 | unsigned long value; |
6aa8b732 | 1002 | |
5e520e62 AK |
1003 | asm volatile (__ex_clear(ASM_VMX_VMREAD_RDX_RAX, "%0") |
1004 | : "=a"(value) : "d"(field) : "cc"); | |
6aa8b732 AK |
1005 | return value; |
1006 | } | |
1007 | ||
96304217 | 1008 | static __always_inline u16 vmcs_read16(unsigned long field) |
6aa8b732 AK |
1009 | { |
1010 | return vmcs_readl(field); | |
1011 | } | |
1012 | ||
96304217 | 1013 | static __always_inline u32 vmcs_read32(unsigned long field) |
6aa8b732 AK |
1014 | { |
1015 | return vmcs_readl(field); | |
1016 | } | |
1017 | ||
96304217 | 1018 | static __always_inline u64 vmcs_read64(unsigned long field) |
6aa8b732 | 1019 | { |
05b3e0c2 | 1020 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
1021 | return vmcs_readl(field); |
1022 | #else | |
1023 | return vmcs_readl(field) | ((u64)vmcs_readl(field+1) << 32); | |
1024 | #endif | |
1025 | } | |
1026 | ||
e52de1b8 AK |
1027 | static noinline void vmwrite_error(unsigned long field, unsigned long value) |
1028 | { | |
1029 | printk(KERN_ERR "vmwrite error: reg %lx value %lx (err %d)\n", | |
1030 | field, value, vmcs_read32(VM_INSTRUCTION_ERROR)); | |
1031 | dump_stack(); | |
1032 | } | |
1033 | ||
6aa8b732 AK |
1034 | static void vmcs_writel(unsigned long field, unsigned long value) |
1035 | { | |
1036 | u8 error; | |
1037 | ||
4ecac3fd | 1038 | asm volatile (__ex(ASM_VMX_VMWRITE_RAX_RDX) "; setna %0" |
d77c26fc | 1039 | : "=q"(error) : "a"(value), "d"(field) : "cc"); |
e52de1b8 AK |
1040 | if (unlikely(error)) |
1041 | vmwrite_error(field, value); | |
6aa8b732 AK |
1042 | } |
1043 | ||
1044 | static void vmcs_write16(unsigned long field, u16 value) | |
1045 | { | |
1046 | vmcs_writel(field, value); | |
1047 | } | |
1048 | ||
1049 | static void vmcs_write32(unsigned long field, u32 value) | |
1050 | { | |
1051 | vmcs_writel(field, value); | |
1052 | } | |
1053 | ||
1054 | static void vmcs_write64(unsigned long field, u64 value) | |
1055 | { | |
6aa8b732 | 1056 | vmcs_writel(field, value); |
7682f2d0 | 1057 | #ifndef CONFIG_X86_64 |
6aa8b732 AK |
1058 | asm volatile (""); |
1059 | vmcs_writel(field+1, value >> 32); | |
1060 | #endif | |
1061 | } | |
1062 | ||
2ab455cc AL |
1063 | static void vmcs_clear_bits(unsigned long field, u32 mask) |
1064 | { | |
1065 | vmcs_writel(field, vmcs_readl(field) & ~mask); | |
1066 | } | |
1067 | ||
1068 | static void vmcs_set_bits(unsigned long field, u32 mask) | |
1069 | { | |
1070 | vmcs_writel(field, vmcs_readl(field) | mask); | |
1071 | } | |
1072 | ||
2fb92db1 AK |
1073 | static void vmx_segment_cache_clear(struct vcpu_vmx *vmx) |
1074 | { | |
1075 | vmx->segment_cache.bitmask = 0; | |
1076 | } | |
1077 | ||
1078 | static bool vmx_segment_cache_test_set(struct vcpu_vmx *vmx, unsigned seg, | |
1079 | unsigned field) | |
1080 | { | |
1081 | bool ret; | |
1082 | u32 mask = 1 << (seg * SEG_FIELD_NR + field); | |
1083 | ||
1084 | if (!(vmx->vcpu.arch.regs_avail & (1 << VCPU_EXREG_SEGMENTS))) { | |
1085 | vmx->vcpu.arch.regs_avail |= (1 << VCPU_EXREG_SEGMENTS); | |
1086 | vmx->segment_cache.bitmask = 0; | |
1087 | } | |
1088 | ret = vmx->segment_cache.bitmask & mask; | |
1089 | vmx->segment_cache.bitmask |= mask; | |
1090 | return ret; | |
1091 | } | |
1092 | ||
1093 | static u16 vmx_read_guest_seg_selector(struct vcpu_vmx *vmx, unsigned seg) | |
1094 | { | |
1095 | u16 *p = &vmx->segment_cache.seg[seg].selector; | |
1096 | ||
1097 | if (!vmx_segment_cache_test_set(vmx, seg, SEG_FIELD_SEL)) | |
1098 | *p = vmcs_read16(kvm_vmx_segment_fields[seg].selector); | |
1099 | return *p; | |
1100 | } | |
1101 | ||
1102 | static ulong vmx_read_guest_seg_base(struct vcpu_vmx *vmx, unsigned seg) | |
1103 | { | |
1104 | ulong *p = &vmx->segment_cache.seg[seg].base; | |
1105 | ||
1106 | if (!vmx_segment_cache_test_set(vmx, seg, SEG_FIELD_BASE)) | |
1107 | *p = vmcs_readl(kvm_vmx_segment_fields[seg].base); | |
1108 | return *p; | |
1109 | } | |
1110 | ||
1111 | static u32 vmx_read_guest_seg_limit(struct vcpu_vmx *vmx, unsigned seg) | |
1112 | { | |
1113 | u32 *p = &vmx->segment_cache.seg[seg].limit; | |
1114 | ||
1115 | if (!vmx_segment_cache_test_set(vmx, seg, SEG_FIELD_LIMIT)) | |
1116 | *p = vmcs_read32(kvm_vmx_segment_fields[seg].limit); | |
1117 | return *p; | |
1118 | } | |
1119 | ||
1120 | static u32 vmx_read_guest_seg_ar(struct vcpu_vmx *vmx, unsigned seg) | |
1121 | { | |
1122 | u32 *p = &vmx->segment_cache.seg[seg].ar; | |
1123 | ||
1124 | if (!vmx_segment_cache_test_set(vmx, seg, SEG_FIELD_AR)) | |
1125 | *p = vmcs_read32(kvm_vmx_segment_fields[seg].ar_bytes); | |
1126 | return *p; | |
1127 | } | |
1128 | ||
abd3f2d6 AK |
1129 | static void update_exception_bitmap(struct kvm_vcpu *vcpu) |
1130 | { | |
1131 | u32 eb; | |
1132 | ||
fd7373cc JK |
1133 | eb = (1u << PF_VECTOR) | (1u << UD_VECTOR) | (1u << MC_VECTOR) | |
1134 | (1u << NM_VECTOR) | (1u << DB_VECTOR); | |
1135 | if ((vcpu->guest_debug & | |
1136 | (KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_SW_BP)) == | |
1137 | (KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_SW_BP)) | |
1138 | eb |= 1u << BP_VECTOR; | |
7ffd92c5 | 1139 | if (to_vmx(vcpu)->rmode.vm86_active) |
abd3f2d6 | 1140 | eb = ~0; |
089d034e | 1141 | if (enable_ept) |
1439442c | 1142 | eb &= ~(1u << PF_VECTOR); /* bypass_guest_pf = 0 */ |
02daab21 AK |
1143 | if (vcpu->fpu_active) |
1144 | eb &= ~(1u << NM_VECTOR); | |
abd3f2d6 AK |
1145 | vmcs_write32(EXCEPTION_BITMAP, eb); |
1146 | } | |
1147 | ||
61d2ef2c AK |
1148 | static void clear_atomic_switch_msr(struct vcpu_vmx *vmx, unsigned msr) |
1149 | { | |
1150 | unsigned i; | |
1151 | struct msr_autoload *m = &vmx->msr_autoload; | |
1152 | ||
110312c8 AK |
1153 | if (msr == MSR_EFER && cpu_has_load_ia32_efer) { |
1154 | vmcs_clear_bits(VM_ENTRY_CONTROLS, VM_ENTRY_LOAD_IA32_EFER); | |
1155 | vmcs_clear_bits(VM_EXIT_CONTROLS, VM_EXIT_LOAD_IA32_EFER); | |
1156 | return; | |
1157 | } | |
1158 | ||
61d2ef2c AK |
1159 | for (i = 0; i < m->nr; ++i) |
1160 | if (m->guest[i].index == msr) | |
1161 | break; | |
1162 | ||
1163 | if (i == m->nr) | |
1164 | return; | |
1165 | --m->nr; | |
1166 | m->guest[i] = m->guest[m->nr]; | |
1167 | m->host[i] = m->host[m->nr]; | |
1168 | vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, m->nr); | |
1169 | vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, m->nr); | |
1170 | } | |
1171 | ||
1172 | static void add_atomic_switch_msr(struct vcpu_vmx *vmx, unsigned msr, | |
1173 | u64 guest_val, u64 host_val) | |
1174 | { | |
1175 | unsigned i; | |
1176 | struct msr_autoload *m = &vmx->msr_autoload; | |
1177 | ||
110312c8 AK |
1178 | if (msr == MSR_EFER && cpu_has_load_ia32_efer) { |
1179 | vmcs_write64(GUEST_IA32_EFER, guest_val); | |
1180 | vmcs_write64(HOST_IA32_EFER, host_val); | |
1181 | vmcs_set_bits(VM_ENTRY_CONTROLS, VM_ENTRY_LOAD_IA32_EFER); | |
1182 | vmcs_set_bits(VM_EXIT_CONTROLS, VM_EXIT_LOAD_IA32_EFER); | |
1183 | return; | |
1184 | } | |
1185 | ||
61d2ef2c AK |
1186 | for (i = 0; i < m->nr; ++i) |
1187 | if (m->guest[i].index == msr) | |
1188 | break; | |
1189 | ||
1190 | if (i == m->nr) { | |
1191 | ++m->nr; | |
1192 | vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, m->nr); | |
1193 | vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, m->nr); | |
1194 | } | |
1195 | ||
1196 | m->guest[i].index = msr; | |
1197 | m->guest[i].value = guest_val; | |
1198 | m->host[i].index = msr; | |
1199 | m->host[i].value = host_val; | |
1200 | } | |
1201 | ||
33ed6329 AK |
1202 | static void reload_tss(void) |
1203 | { | |
33ed6329 AK |
1204 | /* |
1205 | * VT restores TR but not its size. Useless. | |
1206 | */ | |
d359192f | 1207 | struct desc_ptr *gdt = &__get_cpu_var(host_gdt); |
a5f61300 | 1208 | struct desc_struct *descs; |
33ed6329 | 1209 | |
d359192f | 1210 | descs = (void *)gdt->address; |
33ed6329 AK |
1211 | descs[GDT_ENTRY_TSS].type = 9; /* available TSS */ |
1212 | load_TR_desc(); | |
33ed6329 AK |
1213 | } |
1214 | ||
92c0d900 | 1215 | static bool update_transition_efer(struct vcpu_vmx *vmx, int efer_offset) |
2cc51560 | 1216 | { |
3a34a881 | 1217 | u64 guest_efer; |
51c6cf66 AK |
1218 | u64 ignore_bits; |
1219 | ||
f6801dff | 1220 | guest_efer = vmx->vcpu.arch.efer; |
3a34a881 | 1221 | |
51c6cf66 AK |
1222 | /* |
1223 | * NX is emulated; LMA and LME handled by hardware; SCE meaninless | |
1224 | * outside long mode | |
1225 | */ | |
1226 | ignore_bits = EFER_NX | EFER_SCE; | |
1227 | #ifdef CONFIG_X86_64 | |
1228 | ignore_bits |= EFER_LMA | EFER_LME; | |
1229 | /* SCE is meaningful only in long mode on Intel */ | |
1230 | if (guest_efer & EFER_LMA) | |
1231 | ignore_bits &= ~(u64)EFER_SCE; | |
1232 | #endif | |
51c6cf66 AK |
1233 | guest_efer &= ~ignore_bits; |
1234 | guest_efer |= host_efer & ignore_bits; | |
26bb0981 | 1235 | vmx->guest_msrs[efer_offset].data = guest_efer; |
d5696725 | 1236 | vmx->guest_msrs[efer_offset].mask = ~ignore_bits; |
84ad33ef AK |
1237 | |
1238 | clear_atomic_switch_msr(vmx, MSR_EFER); | |
1239 | /* On ept, can't emulate nx, and must switch nx atomically */ | |
1240 | if (enable_ept && ((vmx->vcpu.arch.efer ^ host_efer) & EFER_NX)) { | |
1241 | guest_efer = vmx->vcpu.arch.efer; | |
1242 | if (!(guest_efer & EFER_LMA)) | |
1243 | guest_efer &= ~EFER_LME; | |
1244 | add_atomic_switch_msr(vmx, MSR_EFER, guest_efer, host_efer); | |
1245 | return false; | |
1246 | } | |
1247 | ||
26bb0981 | 1248 | return true; |
51c6cf66 AK |
1249 | } |
1250 | ||
2d49ec72 GN |
1251 | static unsigned long segment_base(u16 selector) |
1252 | { | |
d359192f | 1253 | struct desc_ptr *gdt = &__get_cpu_var(host_gdt); |
2d49ec72 GN |
1254 | struct desc_struct *d; |
1255 | unsigned long table_base; | |
1256 | unsigned long v; | |
1257 | ||
1258 | if (!(selector & ~3)) | |
1259 | return 0; | |
1260 | ||
d359192f | 1261 | table_base = gdt->address; |
2d49ec72 GN |
1262 | |
1263 | if (selector & 4) { /* from ldt */ | |
1264 | u16 ldt_selector = kvm_read_ldt(); | |
1265 | ||
1266 | if (!(ldt_selector & ~3)) | |
1267 | return 0; | |
1268 | ||
1269 | table_base = segment_base(ldt_selector); | |
1270 | } | |
1271 | d = (struct desc_struct *)(table_base + (selector & ~7)); | |
1272 | v = get_desc_base(d); | |
1273 | #ifdef CONFIG_X86_64 | |
1274 | if (d->s == 0 && (d->type == 2 || d->type == 9 || d->type == 11)) | |
1275 | v |= ((unsigned long)((struct ldttss_desc64 *)d)->base3) << 32; | |
1276 | #endif | |
1277 | return v; | |
1278 | } | |
1279 | ||
1280 | static inline unsigned long kvm_read_tr_base(void) | |
1281 | { | |
1282 | u16 tr; | |
1283 | asm("str %0" : "=g"(tr)); | |
1284 | return segment_base(tr); | |
1285 | } | |
1286 | ||
04d2cc77 | 1287 | static void vmx_save_host_state(struct kvm_vcpu *vcpu) |
33ed6329 | 1288 | { |
04d2cc77 | 1289 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
26bb0981 | 1290 | int i; |
04d2cc77 | 1291 | |
a2fa3e9f | 1292 | if (vmx->host_state.loaded) |
33ed6329 AK |
1293 | return; |
1294 | ||
a2fa3e9f | 1295 | vmx->host_state.loaded = 1; |
33ed6329 AK |
1296 | /* |
1297 | * Set host fs and gs selectors. Unfortunately, 22.2.3 does not | |
1298 | * allow segment selectors with cpl > 0 or ti == 1. | |
1299 | */ | |
d6e88aec | 1300 | vmx->host_state.ldt_sel = kvm_read_ldt(); |
152d3f2f | 1301 | vmx->host_state.gs_ldt_reload_needed = vmx->host_state.ldt_sel; |
9581d442 | 1302 | savesegment(fs, vmx->host_state.fs_sel); |
152d3f2f | 1303 | if (!(vmx->host_state.fs_sel & 7)) { |
a2fa3e9f | 1304 | vmcs_write16(HOST_FS_SELECTOR, vmx->host_state.fs_sel); |
152d3f2f LV |
1305 | vmx->host_state.fs_reload_needed = 0; |
1306 | } else { | |
33ed6329 | 1307 | vmcs_write16(HOST_FS_SELECTOR, 0); |
152d3f2f | 1308 | vmx->host_state.fs_reload_needed = 1; |
33ed6329 | 1309 | } |
9581d442 | 1310 | savesegment(gs, vmx->host_state.gs_sel); |
a2fa3e9f GH |
1311 | if (!(vmx->host_state.gs_sel & 7)) |
1312 | vmcs_write16(HOST_GS_SELECTOR, vmx->host_state.gs_sel); | |
33ed6329 AK |
1313 | else { |
1314 | vmcs_write16(HOST_GS_SELECTOR, 0); | |
152d3f2f | 1315 | vmx->host_state.gs_ldt_reload_needed = 1; |
33ed6329 AK |
1316 | } |
1317 | ||
1318 | #ifdef CONFIG_X86_64 | |
1319 | vmcs_writel(HOST_FS_BASE, read_msr(MSR_FS_BASE)); | |
1320 | vmcs_writel(HOST_GS_BASE, read_msr(MSR_GS_BASE)); | |
1321 | #else | |
a2fa3e9f GH |
1322 | vmcs_writel(HOST_FS_BASE, segment_base(vmx->host_state.fs_sel)); |
1323 | vmcs_writel(HOST_GS_BASE, segment_base(vmx->host_state.gs_sel)); | |
33ed6329 | 1324 | #endif |
707c0874 AK |
1325 | |
1326 | #ifdef CONFIG_X86_64 | |
c8770e7b AK |
1327 | rdmsrl(MSR_KERNEL_GS_BASE, vmx->msr_host_kernel_gs_base); |
1328 | if (is_long_mode(&vmx->vcpu)) | |
44ea2b17 | 1329 | wrmsrl(MSR_KERNEL_GS_BASE, vmx->msr_guest_kernel_gs_base); |
707c0874 | 1330 | #endif |
26bb0981 AK |
1331 | for (i = 0; i < vmx->save_nmsrs; ++i) |
1332 | kvm_set_shared_msr(vmx->guest_msrs[i].index, | |
d5696725 AK |
1333 | vmx->guest_msrs[i].data, |
1334 | vmx->guest_msrs[i].mask); | |
33ed6329 AK |
1335 | } |
1336 | ||
a9b21b62 | 1337 | static void __vmx_load_host_state(struct vcpu_vmx *vmx) |
33ed6329 | 1338 | { |
a2fa3e9f | 1339 | if (!vmx->host_state.loaded) |
33ed6329 AK |
1340 | return; |
1341 | ||
e1beb1d3 | 1342 | ++vmx->vcpu.stat.host_state_reload; |
a2fa3e9f | 1343 | vmx->host_state.loaded = 0; |
c8770e7b AK |
1344 | #ifdef CONFIG_X86_64 |
1345 | if (is_long_mode(&vmx->vcpu)) | |
1346 | rdmsrl(MSR_KERNEL_GS_BASE, vmx->msr_guest_kernel_gs_base); | |
1347 | #endif | |
152d3f2f | 1348 | if (vmx->host_state.gs_ldt_reload_needed) { |
d6e88aec | 1349 | kvm_load_ldt(vmx->host_state.ldt_sel); |
33ed6329 | 1350 | #ifdef CONFIG_X86_64 |
9581d442 | 1351 | load_gs_index(vmx->host_state.gs_sel); |
9581d442 AK |
1352 | #else |
1353 | loadsegment(gs, vmx->host_state.gs_sel); | |
33ed6329 | 1354 | #endif |
33ed6329 | 1355 | } |
0a77fe4c AK |
1356 | if (vmx->host_state.fs_reload_needed) |
1357 | loadsegment(fs, vmx->host_state.fs_sel); | |
152d3f2f | 1358 | reload_tss(); |
44ea2b17 | 1359 | #ifdef CONFIG_X86_64 |
c8770e7b | 1360 | wrmsrl(MSR_KERNEL_GS_BASE, vmx->msr_host_kernel_gs_base); |
44ea2b17 | 1361 | #endif |
1c11e713 AK |
1362 | if (current_thread_info()->status & TS_USEDFPU) |
1363 | clts(); | |
3444d7da | 1364 | load_gdt(&__get_cpu_var(host_gdt)); |
33ed6329 AK |
1365 | } |
1366 | ||
a9b21b62 AK |
1367 | static void vmx_load_host_state(struct vcpu_vmx *vmx) |
1368 | { | |
1369 | preempt_disable(); | |
1370 | __vmx_load_host_state(vmx); | |
1371 | preempt_enable(); | |
1372 | } | |
1373 | ||
6aa8b732 AK |
1374 | /* |
1375 | * Switches to specified vcpu, until a matching vcpu_put(), but assumes | |
1376 | * vcpu mutex is already taken. | |
1377 | */ | |
15ad7146 | 1378 | static void vmx_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
6aa8b732 | 1379 | { |
a2fa3e9f | 1380 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
4610c9cc | 1381 | u64 phys_addr = __pa(per_cpu(vmxarea, cpu)); |
6aa8b732 | 1382 | |
4610c9cc DX |
1383 | if (!vmm_exclusive) |
1384 | kvm_cpu_vmxon(phys_addr); | |
d462b819 NHE |
1385 | else if (vmx->loaded_vmcs->cpu != cpu) |
1386 | loaded_vmcs_clear(vmx->loaded_vmcs); | |
6aa8b732 | 1387 | |
d462b819 NHE |
1388 | if (per_cpu(current_vmcs, cpu) != vmx->loaded_vmcs->vmcs) { |
1389 | per_cpu(current_vmcs, cpu) = vmx->loaded_vmcs->vmcs; | |
1390 | vmcs_load(vmx->loaded_vmcs->vmcs); | |
6aa8b732 AK |
1391 | } |
1392 | ||
d462b819 | 1393 | if (vmx->loaded_vmcs->cpu != cpu) { |
d359192f | 1394 | struct desc_ptr *gdt = &__get_cpu_var(host_gdt); |
6aa8b732 AK |
1395 | unsigned long sysenter_esp; |
1396 | ||
a8eeb04a | 1397 | kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); |
92fe13be | 1398 | local_irq_disable(); |
d462b819 NHE |
1399 | list_add(&vmx->loaded_vmcs->loaded_vmcss_on_cpu_link, |
1400 | &per_cpu(loaded_vmcss_on_cpu, cpu)); | |
92fe13be DX |
1401 | local_irq_enable(); |
1402 | ||
6aa8b732 AK |
1403 | /* |
1404 | * Linux uses per-cpu TSS and GDT, so set these when switching | |
1405 | * processors. | |
1406 | */ | |
d6e88aec | 1407 | vmcs_writel(HOST_TR_BASE, kvm_read_tr_base()); /* 22.2.4 */ |
d359192f | 1408 | vmcs_writel(HOST_GDTR_BASE, gdt->address); /* 22.2.4 */ |
6aa8b732 AK |
1409 | |
1410 | rdmsrl(MSR_IA32_SYSENTER_ESP, sysenter_esp); | |
1411 | vmcs_writel(HOST_IA32_SYSENTER_ESP, sysenter_esp); /* 22.2.3 */ | |
d462b819 | 1412 | vmx->loaded_vmcs->cpu = cpu; |
6aa8b732 | 1413 | } |
6aa8b732 AK |
1414 | } |
1415 | ||
1416 | static void vmx_vcpu_put(struct kvm_vcpu *vcpu) | |
1417 | { | |
a9b21b62 | 1418 | __vmx_load_host_state(to_vmx(vcpu)); |
4610c9cc | 1419 | if (!vmm_exclusive) { |
d462b819 NHE |
1420 | __loaded_vmcs_clear(to_vmx(vcpu)->loaded_vmcs); |
1421 | vcpu->cpu = -1; | |
4610c9cc DX |
1422 | kvm_cpu_vmxoff(); |
1423 | } | |
6aa8b732 AK |
1424 | } |
1425 | ||
5fd86fcf AK |
1426 | static void vmx_fpu_activate(struct kvm_vcpu *vcpu) |
1427 | { | |
81231c69 AK |
1428 | ulong cr0; |
1429 | ||
5fd86fcf AK |
1430 | if (vcpu->fpu_active) |
1431 | return; | |
1432 | vcpu->fpu_active = 1; | |
81231c69 AK |
1433 | cr0 = vmcs_readl(GUEST_CR0); |
1434 | cr0 &= ~(X86_CR0_TS | X86_CR0_MP); | |
1435 | cr0 |= kvm_read_cr0_bits(vcpu, X86_CR0_TS | X86_CR0_MP); | |
1436 | vmcs_writel(GUEST_CR0, cr0); | |
5fd86fcf | 1437 | update_exception_bitmap(vcpu); |
edcafe3c AK |
1438 | vcpu->arch.cr0_guest_owned_bits = X86_CR0_TS; |
1439 | vmcs_writel(CR0_GUEST_HOST_MASK, ~vcpu->arch.cr0_guest_owned_bits); | |
5fd86fcf AK |
1440 | } |
1441 | ||
edcafe3c AK |
1442 | static void vmx_decache_cr0_guest_bits(struct kvm_vcpu *vcpu); |
1443 | ||
5fd86fcf AK |
1444 | static void vmx_fpu_deactivate(struct kvm_vcpu *vcpu) |
1445 | { | |
edcafe3c | 1446 | vmx_decache_cr0_guest_bits(vcpu); |
81231c69 | 1447 | vmcs_set_bits(GUEST_CR0, X86_CR0_TS | X86_CR0_MP); |
5fd86fcf | 1448 | update_exception_bitmap(vcpu); |
edcafe3c AK |
1449 | vcpu->arch.cr0_guest_owned_bits = 0; |
1450 | vmcs_writel(CR0_GUEST_HOST_MASK, ~vcpu->arch.cr0_guest_owned_bits); | |
1451 | vmcs_writel(CR0_READ_SHADOW, vcpu->arch.cr0); | |
5fd86fcf AK |
1452 | } |
1453 | ||
6aa8b732 AK |
1454 | static unsigned long vmx_get_rflags(struct kvm_vcpu *vcpu) |
1455 | { | |
78ac8b47 | 1456 | unsigned long rflags, save_rflags; |
345dcaa8 | 1457 | |
6de12732 AK |
1458 | if (!test_bit(VCPU_EXREG_RFLAGS, (ulong *)&vcpu->arch.regs_avail)) { |
1459 | __set_bit(VCPU_EXREG_RFLAGS, (ulong *)&vcpu->arch.regs_avail); | |
1460 | rflags = vmcs_readl(GUEST_RFLAGS); | |
1461 | if (to_vmx(vcpu)->rmode.vm86_active) { | |
1462 | rflags &= RMODE_GUEST_OWNED_EFLAGS_BITS; | |
1463 | save_rflags = to_vmx(vcpu)->rmode.save_rflags; | |
1464 | rflags |= save_rflags & ~RMODE_GUEST_OWNED_EFLAGS_BITS; | |
1465 | } | |
1466 | to_vmx(vcpu)->rflags = rflags; | |
78ac8b47 | 1467 | } |
6de12732 | 1468 | return to_vmx(vcpu)->rflags; |
6aa8b732 AK |
1469 | } |
1470 | ||
1471 | static void vmx_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags) | |
1472 | { | |
6de12732 | 1473 | __set_bit(VCPU_EXREG_RFLAGS, (ulong *)&vcpu->arch.regs_avail); |
69c73028 | 1474 | __clear_bit(VCPU_EXREG_CPL, (ulong *)&vcpu->arch.regs_avail); |
6de12732 | 1475 | to_vmx(vcpu)->rflags = rflags; |
78ac8b47 AK |
1476 | if (to_vmx(vcpu)->rmode.vm86_active) { |
1477 | to_vmx(vcpu)->rmode.save_rflags = rflags; | |
053de044 | 1478 | rflags |= X86_EFLAGS_IOPL | X86_EFLAGS_VM; |
78ac8b47 | 1479 | } |
6aa8b732 AK |
1480 | vmcs_writel(GUEST_RFLAGS, rflags); |
1481 | } | |
1482 | ||
2809f5d2 GC |
1483 | static u32 vmx_get_interrupt_shadow(struct kvm_vcpu *vcpu, int mask) |
1484 | { | |
1485 | u32 interruptibility = vmcs_read32(GUEST_INTERRUPTIBILITY_INFO); | |
1486 | int ret = 0; | |
1487 | ||
1488 | if (interruptibility & GUEST_INTR_STATE_STI) | |
48005f64 | 1489 | ret |= KVM_X86_SHADOW_INT_STI; |
2809f5d2 | 1490 | if (interruptibility & GUEST_INTR_STATE_MOV_SS) |
48005f64 | 1491 | ret |= KVM_X86_SHADOW_INT_MOV_SS; |
2809f5d2 GC |
1492 | |
1493 | return ret & mask; | |
1494 | } | |
1495 | ||
1496 | static void vmx_set_interrupt_shadow(struct kvm_vcpu *vcpu, int mask) | |
1497 | { | |
1498 | u32 interruptibility_old = vmcs_read32(GUEST_INTERRUPTIBILITY_INFO); | |
1499 | u32 interruptibility = interruptibility_old; | |
1500 | ||
1501 | interruptibility &= ~(GUEST_INTR_STATE_STI | GUEST_INTR_STATE_MOV_SS); | |
1502 | ||
48005f64 | 1503 | if (mask & KVM_X86_SHADOW_INT_MOV_SS) |
2809f5d2 | 1504 | interruptibility |= GUEST_INTR_STATE_MOV_SS; |
48005f64 | 1505 | else if (mask & KVM_X86_SHADOW_INT_STI) |
2809f5d2 GC |
1506 | interruptibility |= GUEST_INTR_STATE_STI; |
1507 | ||
1508 | if ((interruptibility != interruptibility_old)) | |
1509 | vmcs_write32(GUEST_INTERRUPTIBILITY_INFO, interruptibility); | |
1510 | } | |
1511 | ||
6aa8b732 AK |
1512 | static void skip_emulated_instruction(struct kvm_vcpu *vcpu) |
1513 | { | |
1514 | unsigned long rip; | |
6aa8b732 | 1515 | |
5fdbf976 | 1516 | rip = kvm_rip_read(vcpu); |
6aa8b732 | 1517 | rip += vmcs_read32(VM_EXIT_INSTRUCTION_LEN); |
5fdbf976 | 1518 | kvm_rip_write(vcpu, rip); |
6aa8b732 | 1519 | |
2809f5d2 GC |
1520 | /* skipping an emulated instruction also counts */ |
1521 | vmx_set_interrupt_shadow(vcpu, 0); | |
6aa8b732 AK |
1522 | } |
1523 | ||
443381a8 AL |
1524 | static void vmx_clear_hlt(struct kvm_vcpu *vcpu) |
1525 | { | |
1526 | /* Ensure that we clear the HLT state in the VMCS. We don't need to | |
1527 | * explicitly skip the instruction because if the HLT state is set, then | |
1528 | * the instruction is already executing and RIP has already been | |
1529 | * advanced. */ | |
1530 | if (!yield_on_hlt && | |
1531 | vmcs_read32(GUEST_ACTIVITY_STATE) == GUEST_ACTIVITY_HLT) | |
1532 | vmcs_write32(GUEST_ACTIVITY_STATE, GUEST_ACTIVITY_ACTIVE); | |
1533 | } | |
1534 | ||
298101da | 1535 | static void vmx_queue_exception(struct kvm_vcpu *vcpu, unsigned nr, |
ce7ddec4 JR |
1536 | bool has_error_code, u32 error_code, |
1537 | bool reinject) | |
298101da | 1538 | { |
77ab6db0 | 1539 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
8ab2d2e2 | 1540 | u32 intr_info = nr | INTR_INFO_VALID_MASK; |
77ab6db0 | 1541 | |
8ab2d2e2 | 1542 | if (has_error_code) { |
77ab6db0 | 1543 | vmcs_write32(VM_ENTRY_EXCEPTION_ERROR_CODE, error_code); |
8ab2d2e2 JK |
1544 | intr_info |= INTR_INFO_DELIVER_CODE_MASK; |
1545 | } | |
77ab6db0 | 1546 | |
7ffd92c5 | 1547 | if (vmx->rmode.vm86_active) { |
71f9833b SH |
1548 | int inc_eip = 0; |
1549 | if (kvm_exception_is_soft(nr)) | |
1550 | inc_eip = vcpu->arch.event_exit_inst_len; | |
1551 | if (kvm_inject_realmode_interrupt(vcpu, nr, inc_eip) != EMULATE_DONE) | |
a92601bb | 1552 | kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu); |
77ab6db0 JK |
1553 | return; |
1554 | } | |
1555 | ||
66fd3f7f GN |
1556 | if (kvm_exception_is_soft(nr)) { |
1557 | vmcs_write32(VM_ENTRY_INSTRUCTION_LEN, | |
1558 | vmx->vcpu.arch.event_exit_inst_len); | |
8ab2d2e2 JK |
1559 | intr_info |= INTR_TYPE_SOFT_EXCEPTION; |
1560 | } else | |
1561 | intr_info |= INTR_TYPE_HARD_EXCEPTION; | |
1562 | ||
1563 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, intr_info); | |
443381a8 | 1564 | vmx_clear_hlt(vcpu); |
298101da AK |
1565 | } |
1566 | ||
4e47c7a6 SY |
1567 | static bool vmx_rdtscp_supported(void) |
1568 | { | |
1569 | return cpu_has_vmx_rdtscp(); | |
1570 | } | |
1571 | ||
a75beee6 ED |
1572 | /* |
1573 | * Swap MSR entry in host/guest MSR entry array. | |
1574 | */ | |
8b9cf98c | 1575 | static void move_msr_up(struct vcpu_vmx *vmx, int from, int to) |
a75beee6 | 1576 | { |
26bb0981 | 1577 | struct shared_msr_entry tmp; |
a2fa3e9f GH |
1578 | |
1579 | tmp = vmx->guest_msrs[to]; | |
1580 | vmx->guest_msrs[to] = vmx->guest_msrs[from]; | |
1581 | vmx->guest_msrs[from] = tmp; | |
a75beee6 ED |
1582 | } |
1583 | ||
e38aea3e AK |
1584 | /* |
1585 | * Set up the vmcs to automatically save and restore system | |
1586 | * msrs. Don't touch the 64-bit msrs if the guest is in legacy | |
1587 | * mode, as fiddling with msrs is very expensive. | |
1588 | */ | |
8b9cf98c | 1589 | static void setup_msrs(struct vcpu_vmx *vmx) |
e38aea3e | 1590 | { |
26bb0981 | 1591 | int save_nmsrs, index; |
5897297b | 1592 | unsigned long *msr_bitmap; |
e38aea3e | 1593 | |
33f9c505 | 1594 | vmx_load_host_state(vmx); |
a75beee6 ED |
1595 | save_nmsrs = 0; |
1596 | #ifdef CONFIG_X86_64 | |
8b9cf98c | 1597 | if (is_long_mode(&vmx->vcpu)) { |
8b9cf98c | 1598 | index = __find_msr_index(vmx, MSR_SYSCALL_MASK); |
a75beee6 | 1599 | if (index >= 0) |
8b9cf98c RR |
1600 | move_msr_up(vmx, index, save_nmsrs++); |
1601 | index = __find_msr_index(vmx, MSR_LSTAR); | |
a75beee6 | 1602 | if (index >= 0) |
8b9cf98c RR |
1603 | move_msr_up(vmx, index, save_nmsrs++); |
1604 | index = __find_msr_index(vmx, MSR_CSTAR); | |
a75beee6 | 1605 | if (index >= 0) |
8b9cf98c | 1606 | move_msr_up(vmx, index, save_nmsrs++); |
4e47c7a6 SY |
1607 | index = __find_msr_index(vmx, MSR_TSC_AUX); |
1608 | if (index >= 0 && vmx->rdtscp_enabled) | |
1609 | move_msr_up(vmx, index, save_nmsrs++); | |
a75beee6 | 1610 | /* |
8c06585d | 1611 | * MSR_STAR is only needed on long mode guests, and only |
a75beee6 ED |
1612 | * if efer.sce is enabled. |
1613 | */ | |
8c06585d | 1614 | index = __find_msr_index(vmx, MSR_STAR); |
f6801dff | 1615 | if ((index >= 0) && (vmx->vcpu.arch.efer & EFER_SCE)) |
8b9cf98c | 1616 | move_msr_up(vmx, index, save_nmsrs++); |
a75beee6 ED |
1617 | } |
1618 | #endif | |
92c0d900 AK |
1619 | index = __find_msr_index(vmx, MSR_EFER); |
1620 | if (index >= 0 && update_transition_efer(vmx, index)) | |
26bb0981 | 1621 | move_msr_up(vmx, index, save_nmsrs++); |
e38aea3e | 1622 | |
26bb0981 | 1623 | vmx->save_nmsrs = save_nmsrs; |
5897297b AK |
1624 | |
1625 | if (cpu_has_vmx_msr_bitmap()) { | |
1626 | if (is_long_mode(&vmx->vcpu)) | |
1627 | msr_bitmap = vmx_msr_bitmap_longmode; | |
1628 | else | |
1629 | msr_bitmap = vmx_msr_bitmap_legacy; | |
1630 | ||
1631 | vmcs_write64(MSR_BITMAP, __pa(msr_bitmap)); | |
1632 | } | |
e38aea3e AK |
1633 | } |
1634 | ||
6aa8b732 AK |
1635 | /* |
1636 | * reads and returns guest's timestamp counter "register" | |
1637 | * guest_tsc = host_tsc + tsc_offset -- 21.3 | |
1638 | */ | |
1639 | static u64 guest_read_tsc(void) | |
1640 | { | |
1641 | u64 host_tsc, tsc_offset; | |
1642 | ||
1643 | rdtscll(host_tsc); | |
1644 | tsc_offset = vmcs_read64(TSC_OFFSET); | |
1645 | return host_tsc + tsc_offset; | |
1646 | } | |
1647 | ||
4051b188 JR |
1648 | /* |
1649 | * Empty call-back. Needs to be implemented when VMX enables the SET_TSC_KHZ | |
1650 | * ioctl. In this case the call-back should update internal vmx state to make | |
1651 | * the changes effective. | |
1652 | */ | |
1653 | static void vmx_set_tsc_khz(struct kvm_vcpu *vcpu, u32 user_tsc_khz) | |
1654 | { | |
1655 | /* Nothing to do here */ | |
1656 | } | |
1657 | ||
6aa8b732 | 1658 | /* |
99e3e30a | 1659 | * writes 'offset' into guest's timestamp counter offset register |
6aa8b732 | 1660 | */ |
99e3e30a | 1661 | static void vmx_write_tsc_offset(struct kvm_vcpu *vcpu, u64 offset) |
6aa8b732 | 1662 | { |
f4e1b3c8 | 1663 | vmcs_write64(TSC_OFFSET, offset); |
6aa8b732 AK |
1664 | } |
1665 | ||
e48672fa ZA |
1666 | static void vmx_adjust_tsc_offset(struct kvm_vcpu *vcpu, s64 adjustment) |
1667 | { | |
1668 | u64 offset = vmcs_read64(TSC_OFFSET); | |
1669 | vmcs_write64(TSC_OFFSET, offset + adjustment); | |
1670 | } | |
1671 | ||
857e4099 JR |
1672 | static u64 vmx_compute_tsc_offset(struct kvm_vcpu *vcpu, u64 target_tsc) |
1673 | { | |
1674 | return target_tsc - native_read_tsc(); | |
1675 | } | |
1676 | ||
801d3424 NHE |
1677 | static bool guest_cpuid_has_vmx(struct kvm_vcpu *vcpu) |
1678 | { | |
1679 | struct kvm_cpuid_entry2 *best = kvm_find_cpuid_entry(vcpu, 1, 0); | |
1680 | return best && (best->ecx & (1 << (X86_FEATURE_VMX & 31))); | |
1681 | } | |
1682 | ||
1683 | /* | |
1684 | * nested_vmx_allowed() checks whether a guest should be allowed to use VMX | |
1685 | * instructions and MSRs (i.e., nested VMX). Nested VMX is disabled for | |
1686 | * all guests if the "nested" module option is off, and can also be disabled | |
1687 | * for a single guest by disabling its VMX cpuid bit. | |
1688 | */ | |
1689 | static inline bool nested_vmx_allowed(struct kvm_vcpu *vcpu) | |
1690 | { | |
1691 | return nested && guest_cpuid_has_vmx(vcpu); | |
1692 | } | |
1693 | ||
b87a51ae NHE |
1694 | /* |
1695 | * nested_vmx_setup_ctls_msrs() sets up variables containing the values to be | |
1696 | * returned for the various VMX controls MSRs when nested VMX is enabled. | |
1697 | * The same values should also be used to verify that vmcs12 control fields are | |
1698 | * valid during nested entry from L1 to L2. | |
1699 | * Each of these control msrs has a low and high 32-bit half: A low bit is on | |
1700 | * if the corresponding bit in the (32-bit) control field *must* be on, and a | |
1701 | * bit in the high half is on if the corresponding bit in the control field | |
1702 | * may be on. See also vmx_control_verify(). | |
1703 | * TODO: allow these variables to be modified (downgraded) by module options | |
1704 | * or other means. | |
1705 | */ | |
1706 | static u32 nested_vmx_procbased_ctls_low, nested_vmx_procbased_ctls_high; | |
1707 | static u32 nested_vmx_secondary_ctls_low, nested_vmx_secondary_ctls_high; | |
1708 | static u32 nested_vmx_pinbased_ctls_low, nested_vmx_pinbased_ctls_high; | |
1709 | static u32 nested_vmx_exit_ctls_low, nested_vmx_exit_ctls_high; | |
1710 | static u32 nested_vmx_entry_ctls_low, nested_vmx_entry_ctls_high; | |
1711 | static __init void nested_vmx_setup_ctls_msrs(void) | |
1712 | { | |
1713 | /* | |
1714 | * Note that as a general rule, the high half of the MSRs (bits in | |
1715 | * the control fields which may be 1) should be initialized by the | |
1716 | * intersection of the underlying hardware's MSR (i.e., features which | |
1717 | * can be supported) and the list of features we want to expose - | |
1718 | * because they are known to be properly supported in our code. | |
1719 | * Also, usually, the low half of the MSRs (bits which must be 1) can | |
1720 | * be set to 0, meaning that L1 may turn off any of these bits. The | |
1721 | * reason is that if one of these bits is necessary, it will appear | |
1722 | * in vmcs01 and prepare_vmcs02, when it bitwise-or's the control | |
1723 | * fields of vmcs01 and vmcs02, will turn these bits off - and | |
1724 | * nested_vmx_exit_handled() will not pass related exits to L1. | |
1725 | * These rules have exceptions below. | |
1726 | */ | |
1727 | ||
1728 | /* pin-based controls */ | |
1729 | /* | |
1730 | * According to the Intel spec, if bit 55 of VMX_BASIC is off (as it is | |
1731 | * in our case), bits 1, 2 and 4 (i.e., 0x16) must be 1 in this MSR. | |
1732 | */ | |
1733 | nested_vmx_pinbased_ctls_low = 0x16 ; | |
1734 | nested_vmx_pinbased_ctls_high = 0x16 | | |
1735 | PIN_BASED_EXT_INTR_MASK | PIN_BASED_NMI_EXITING | | |
1736 | PIN_BASED_VIRTUAL_NMIS; | |
1737 | ||
1738 | /* exit controls */ | |
1739 | nested_vmx_exit_ctls_low = 0; | |
1740 | #ifdef CONFIG_X86_64 | |
1741 | nested_vmx_exit_ctls_high = VM_EXIT_HOST_ADDR_SPACE_SIZE; | |
1742 | #else | |
1743 | nested_vmx_exit_ctls_high = 0; | |
1744 | #endif | |
1745 | ||
1746 | /* entry controls */ | |
1747 | rdmsr(MSR_IA32_VMX_ENTRY_CTLS, | |
1748 | nested_vmx_entry_ctls_low, nested_vmx_entry_ctls_high); | |
1749 | nested_vmx_entry_ctls_low = 0; | |
1750 | nested_vmx_entry_ctls_high &= | |
1751 | VM_ENTRY_LOAD_IA32_PAT | VM_ENTRY_IA32E_MODE; | |
1752 | ||
1753 | /* cpu-based controls */ | |
1754 | rdmsr(MSR_IA32_VMX_PROCBASED_CTLS, | |
1755 | nested_vmx_procbased_ctls_low, nested_vmx_procbased_ctls_high); | |
1756 | nested_vmx_procbased_ctls_low = 0; | |
1757 | nested_vmx_procbased_ctls_high &= | |
1758 | CPU_BASED_VIRTUAL_INTR_PENDING | CPU_BASED_USE_TSC_OFFSETING | | |
1759 | CPU_BASED_HLT_EXITING | CPU_BASED_INVLPG_EXITING | | |
1760 | CPU_BASED_MWAIT_EXITING | CPU_BASED_CR3_LOAD_EXITING | | |
1761 | CPU_BASED_CR3_STORE_EXITING | | |
1762 | #ifdef CONFIG_X86_64 | |
1763 | CPU_BASED_CR8_LOAD_EXITING | CPU_BASED_CR8_STORE_EXITING | | |
1764 | #endif | |
1765 | CPU_BASED_MOV_DR_EXITING | CPU_BASED_UNCOND_IO_EXITING | | |
1766 | CPU_BASED_USE_IO_BITMAPS | CPU_BASED_MONITOR_EXITING | | |
1767 | CPU_BASED_ACTIVATE_SECONDARY_CONTROLS; | |
1768 | /* | |
1769 | * We can allow some features even when not supported by the | |
1770 | * hardware. For example, L1 can specify an MSR bitmap - and we | |
1771 | * can use it to avoid exits to L1 - even when L0 runs L2 | |
1772 | * without MSR bitmaps. | |
1773 | */ | |
1774 | nested_vmx_procbased_ctls_high |= CPU_BASED_USE_MSR_BITMAPS; | |
1775 | ||
1776 | /* secondary cpu-based controls */ | |
1777 | rdmsr(MSR_IA32_VMX_PROCBASED_CTLS2, | |
1778 | nested_vmx_secondary_ctls_low, nested_vmx_secondary_ctls_high); | |
1779 | nested_vmx_secondary_ctls_low = 0; | |
1780 | nested_vmx_secondary_ctls_high &= | |
1781 | SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES; | |
1782 | } | |
1783 | ||
1784 | static inline bool vmx_control_verify(u32 control, u32 low, u32 high) | |
1785 | { | |
1786 | /* | |
1787 | * Bits 0 in high must be 0, and bits 1 in low must be 1. | |
1788 | */ | |
1789 | return ((control & high) | low) == control; | |
1790 | } | |
1791 | ||
1792 | static inline u64 vmx_control_msr(u32 low, u32 high) | |
1793 | { | |
1794 | return low | ((u64)high << 32); | |
1795 | } | |
1796 | ||
1797 | /* | |
1798 | * If we allow our guest to use VMX instructions (i.e., nested VMX), we should | |
1799 | * also let it use VMX-specific MSRs. | |
1800 | * vmx_get_vmx_msr() and vmx_set_vmx_msr() return 1 when we handled a | |
1801 | * VMX-specific MSR, or 0 when we haven't (and the caller should handle it | |
1802 | * like all other MSRs). | |
1803 | */ | |
1804 | static int vmx_get_vmx_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata) | |
1805 | { | |
1806 | if (!nested_vmx_allowed(vcpu) && msr_index >= MSR_IA32_VMX_BASIC && | |
1807 | msr_index <= MSR_IA32_VMX_TRUE_ENTRY_CTLS) { | |
1808 | /* | |
1809 | * According to the spec, processors which do not support VMX | |
1810 | * should throw a #GP(0) when VMX capability MSRs are read. | |
1811 | */ | |
1812 | kvm_queue_exception_e(vcpu, GP_VECTOR, 0); | |
1813 | return 1; | |
1814 | } | |
1815 | ||
1816 | switch (msr_index) { | |
1817 | case MSR_IA32_FEATURE_CONTROL: | |
1818 | *pdata = 0; | |
1819 | break; | |
1820 | case MSR_IA32_VMX_BASIC: | |
1821 | /* | |
1822 | * This MSR reports some information about VMX support. We | |
1823 | * should return information about the VMX we emulate for the | |
1824 | * guest, and the VMCS structure we give it - not about the | |
1825 | * VMX support of the underlying hardware. | |
1826 | */ | |
1827 | *pdata = VMCS12_REVISION | | |
1828 | ((u64)VMCS12_SIZE << VMX_BASIC_VMCS_SIZE_SHIFT) | | |
1829 | (VMX_BASIC_MEM_TYPE_WB << VMX_BASIC_MEM_TYPE_SHIFT); | |
1830 | break; | |
1831 | case MSR_IA32_VMX_TRUE_PINBASED_CTLS: | |
1832 | case MSR_IA32_VMX_PINBASED_CTLS: | |
1833 | *pdata = vmx_control_msr(nested_vmx_pinbased_ctls_low, | |
1834 | nested_vmx_pinbased_ctls_high); | |
1835 | break; | |
1836 | case MSR_IA32_VMX_TRUE_PROCBASED_CTLS: | |
1837 | case MSR_IA32_VMX_PROCBASED_CTLS: | |
1838 | *pdata = vmx_control_msr(nested_vmx_procbased_ctls_low, | |
1839 | nested_vmx_procbased_ctls_high); | |
1840 | break; | |
1841 | case MSR_IA32_VMX_TRUE_EXIT_CTLS: | |
1842 | case MSR_IA32_VMX_EXIT_CTLS: | |
1843 | *pdata = vmx_control_msr(nested_vmx_exit_ctls_low, | |
1844 | nested_vmx_exit_ctls_high); | |
1845 | break; | |
1846 | case MSR_IA32_VMX_TRUE_ENTRY_CTLS: | |
1847 | case MSR_IA32_VMX_ENTRY_CTLS: | |
1848 | *pdata = vmx_control_msr(nested_vmx_entry_ctls_low, | |
1849 | nested_vmx_entry_ctls_high); | |
1850 | break; | |
1851 | case MSR_IA32_VMX_MISC: | |
1852 | *pdata = 0; | |
1853 | break; | |
1854 | /* | |
1855 | * These MSRs specify bits which the guest must keep fixed (on or off) | |
1856 | * while L1 is in VMXON mode (in L1's root mode, or running an L2). | |
1857 | * We picked the standard core2 setting. | |
1858 | */ | |
1859 | #define VMXON_CR0_ALWAYSON (X86_CR0_PE | X86_CR0_PG | X86_CR0_NE) | |
1860 | #define VMXON_CR4_ALWAYSON X86_CR4_VMXE | |
1861 | case MSR_IA32_VMX_CR0_FIXED0: | |
1862 | *pdata = VMXON_CR0_ALWAYSON; | |
1863 | break; | |
1864 | case MSR_IA32_VMX_CR0_FIXED1: | |
1865 | *pdata = -1ULL; | |
1866 | break; | |
1867 | case MSR_IA32_VMX_CR4_FIXED0: | |
1868 | *pdata = VMXON_CR4_ALWAYSON; | |
1869 | break; | |
1870 | case MSR_IA32_VMX_CR4_FIXED1: | |
1871 | *pdata = -1ULL; | |
1872 | break; | |
1873 | case MSR_IA32_VMX_VMCS_ENUM: | |
1874 | *pdata = 0x1f; | |
1875 | break; | |
1876 | case MSR_IA32_VMX_PROCBASED_CTLS2: | |
1877 | *pdata = vmx_control_msr(nested_vmx_secondary_ctls_low, | |
1878 | nested_vmx_secondary_ctls_high); | |
1879 | break; | |
1880 | case MSR_IA32_VMX_EPT_VPID_CAP: | |
1881 | /* Currently, no nested ept or nested vpid */ | |
1882 | *pdata = 0; | |
1883 | break; | |
1884 | default: | |
1885 | return 0; | |
1886 | } | |
1887 | ||
1888 | return 1; | |
1889 | } | |
1890 | ||
1891 | static int vmx_set_vmx_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data) | |
1892 | { | |
1893 | if (!nested_vmx_allowed(vcpu)) | |
1894 | return 0; | |
1895 | ||
1896 | if (msr_index == MSR_IA32_FEATURE_CONTROL) | |
1897 | /* TODO: the right thing. */ | |
1898 | return 1; | |
1899 | /* | |
1900 | * No need to treat VMX capability MSRs specially: If we don't handle | |
1901 | * them, handle_wrmsr will #GP(0), which is correct (they are readonly) | |
1902 | */ | |
1903 | return 0; | |
1904 | } | |
1905 | ||
6aa8b732 AK |
1906 | /* |
1907 | * Reads an msr value (of 'msr_index') into 'pdata'. | |
1908 | * Returns 0 on success, non-0 otherwise. | |
1909 | * Assumes vcpu_load() was already called. | |
1910 | */ | |
1911 | static int vmx_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata) | |
1912 | { | |
1913 | u64 data; | |
26bb0981 | 1914 | struct shared_msr_entry *msr; |
6aa8b732 AK |
1915 | |
1916 | if (!pdata) { | |
1917 | printk(KERN_ERR "BUG: get_msr called with NULL pdata\n"); | |
1918 | return -EINVAL; | |
1919 | } | |
1920 | ||
1921 | switch (msr_index) { | |
05b3e0c2 | 1922 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
1923 | case MSR_FS_BASE: |
1924 | data = vmcs_readl(GUEST_FS_BASE); | |
1925 | break; | |
1926 | case MSR_GS_BASE: | |
1927 | data = vmcs_readl(GUEST_GS_BASE); | |
1928 | break; | |
44ea2b17 AK |
1929 | case MSR_KERNEL_GS_BASE: |
1930 | vmx_load_host_state(to_vmx(vcpu)); | |
1931 | data = to_vmx(vcpu)->msr_guest_kernel_gs_base; | |
1932 | break; | |
26bb0981 | 1933 | #endif |
6aa8b732 | 1934 | case MSR_EFER: |
3bab1f5d | 1935 | return kvm_get_msr_common(vcpu, msr_index, pdata); |
af24a4e4 | 1936 | case MSR_IA32_TSC: |
6aa8b732 AK |
1937 | data = guest_read_tsc(); |
1938 | break; | |
1939 | case MSR_IA32_SYSENTER_CS: | |
1940 | data = vmcs_read32(GUEST_SYSENTER_CS); | |
1941 | break; | |
1942 | case MSR_IA32_SYSENTER_EIP: | |
f5b42c33 | 1943 | data = vmcs_readl(GUEST_SYSENTER_EIP); |
6aa8b732 AK |
1944 | break; |
1945 | case MSR_IA32_SYSENTER_ESP: | |
f5b42c33 | 1946 | data = vmcs_readl(GUEST_SYSENTER_ESP); |
6aa8b732 | 1947 | break; |
4e47c7a6 SY |
1948 | case MSR_TSC_AUX: |
1949 | if (!to_vmx(vcpu)->rdtscp_enabled) | |
1950 | return 1; | |
1951 | /* Otherwise falls through */ | |
6aa8b732 | 1952 | default: |
26bb0981 | 1953 | vmx_load_host_state(to_vmx(vcpu)); |
b87a51ae NHE |
1954 | if (vmx_get_vmx_msr(vcpu, msr_index, pdata)) |
1955 | return 0; | |
8b9cf98c | 1956 | msr = find_msr_entry(to_vmx(vcpu), msr_index); |
3bab1f5d | 1957 | if (msr) { |
542423b0 | 1958 | vmx_load_host_state(to_vmx(vcpu)); |
3bab1f5d AK |
1959 | data = msr->data; |
1960 | break; | |
6aa8b732 | 1961 | } |
3bab1f5d | 1962 | return kvm_get_msr_common(vcpu, msr_index, pdata); |
6aa8b732 AK |
1963 | } |
1964 | ||
1965 | *pdata = data; | |
1966 | return 0; | |
1967 | } | |
1968 | ||
1969 | /* | |
1970 | * Writes msr value into into the appropriate "register". | |
1971 | * Returns 0 on success, non-0 otherwise. | |
1972 | * Assumes vcpu_load() was already called. | |
1973 | */ | |
1974 | static int vmx_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data) | |
1975 | { | |
a2fa3e9f | 1976 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
26bb0981 | 1977 | struct shared_msr_entry *msr; |
2cc51560 ED |
1978 | int ret = 0; |
1979 | ||
6aa8b732 | 1980 | switch (msr_index) { |
3bab1f5d | 1981 | case MSR_EFER: |
a9b21b62 | 1982 | vmx_load_host_state(vmx); |
2cc51560 | 1983 | ret = kvm_set_msr_common(vcpu, msr_index, data); |
2cc51560 | 1984 | break; |
16175a79 | 1985 | #ifdef CONFIG_X86_64 |
6aa8b732 | 1986 | case MSR_FS_BASE: |
2fb92db1 | 1987 | vmx_segment_cache_clear(vmx); |
6aa8b732 AK |
1988 | vmcs_writel(GUEST_FS_BASE, data); |
1989 | break; | |
1990 | case MSR_GS_BASE: | |
2fb92db1 | 1991 | vmx_segment_cache_clear(vmx); |
6aa8b732 AK |
1992 | vmcs_writel(GUEST_GS_BASE, data); |
1993 | break; | |
44ea2b17 AK |
1994 | case MSR_KERNEL_GS_BASE: |
1995 | vmx_load_host_state(vmx); | |
1996 | vmx->msr_guest_kernel_gs_base = data; | |
1997 | break; | |
6aa8b732 AK |
1998 | #endif |
1999 | case MSR_IA32_SYSENTER_CS: | |
2000 | vmcs_write32(GUEST_SYSENTER_CS, data); | |
2001 | break; | |
2002 | case MSR_IA32_SYSENTER_EIP: | |
f5b42c33 | 2003 | vmcs_writel(GUEST_SYSENTER_EIP, data); |
6aa8b732 AK |
2004 | break; |
2005 | case MSR_IA32_SYSENTER_ESP: | |
f5b42c33 | 2006 | vmcs_writel(GUEST_SYSENTER_ESP, data); |
6aa8b732 | 2007 | break; |
af24a4e4 | 2008 | case MSR_IA32_TSC: |
99e3e30a | 2009 | kvm_write_tsc(vcpu, data); |
6aa8b732 | 2010 | break; |
468d472f SY |
2011 | case MSR_IA32_CR_PAT: |
2012 | if (vmcs_config.vmentry_ctrl & VM_ENTRY_LOAD_IA32_PAT) { | |
2013 | vmcs_write64(GUEST_IA32_PAT, data); | |
2014 | vcpu->arch.pat = data; | |
2015 | break; | |
2016 | } | |
4e47c7a6 SY |
2017 | ret = kvm_set_msr_common(vcpu, msr_index, data); |
2018 | break; | |
2019 | case MSR_TSC_AUX: | |
2020 | if (!vmx->rdtscp_enabled) | |
2021 | return 1; | |
2022 | /* Check reserved bit, higher 32 bits should be zero */ | |
2023 | if ((data >> 32) != 0) | |
2024 | return 1; | |
2025 | /* Otherwise falls through */ | |
6aa8b732 | 2026 | default: |
b87a51ae NHE |
2027 | if (vmx_set_vmx_msr(vcpu, msr_index, data)) |
2028 | break; | |
8b9cf98c | 2029 | msr = find_msr_entry(vmx, msr_index); |
3bab1f5d | 2030 | if (msr) { |
542423b0 | 2031 | vmx_load_host_state(vmx); |
3bab1f5d AK |
2032 | msr->data = data; |
2033 | break; | |
6aa8b732 | 2034 | } |
2cc51560 | 2035 | ret = kvm_set_msr_common(vcpu, msr_index, data); |
6aa8b732 AK |
2036 | } |
2037 | ||
2cc51560 | 2038 | return ret; |
6aa8b732 AK |
2039 | } |
2040 | ||
5fdbf976 | 2041 | static void vmx_cache_reg(struct kvm_vcpu *vcpu, enum kvm_reg reg) |
6aa8b732 | 2042 | { |
5fdbf976 MT |
2043 | __set_bit(reg, (unsigned long *)&vcpu->arch.regs_avail); |
2044 | switch (reg) { | |
2045 | case VCPU_REGS_RSP: | |
2046 | vcpu->arch.regs[VCPU_REGS_RSP] = vmcs_readl(GUEST_RSP); | |
2047 | break; | |
2048 | case VCPU_REGS_RIP: | |
2049 | vcpu->arch.regs[VCPU_REGS_RIP] = vmcs_readl(GUEST_RIP); | |
2050 | break; | |
6de4f3ad AK |
2051 | case VCPU_EXREG_PDPTR: |
2052 | if (enable_ept) | |
2053 | ept_save_pdptrs(vcpu); | |
2054 | break; | |
5fdbf976 MT |
2055 | default: |
2056 | break; | |
2057 | } | |
6aa8b732 AK |
2058 | } |
2059 | ||
355be0b9 | 2060 | static void set_guest_debug(struct kvm_vcpu *vcpu, struct kvm_guest_debug *dbg) |
6aa8b732 | 2061 | { |
ae675ef0 JK |
2062 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) |
2063 | vmcs_writel(GUEST_DR7, dbg->arch.debugreg[7]); | |
2064 | else | |
2065 | vmcs_writel(GUEST_DR7, vcpu->arch.dr7); | |
2066 | ||
abd3f2d6 | 2067 | update_exception_bitmap(vcpu); |
6aa8b732 AK |
2068 | } |
2069 | ||
2070 | static __init int cpu_has_kvm_support(void) | |
2071 | { | |
6210e37b | 2072 | return cpu_has_vmx(); |
6aa8b732 AK |
2073 | } |
2074 | ||
2075 | static __init int vmx_disabled_by_bios(void) | |
2076 | { | |
2077 | u64 msr; | |
2078 | ||
2079 | rdmsrl(MSR_IA32_FEATURE_CONTROL, msr); | |
cafd6659 | 2080 | if (msr & FEATURE_CONTROL_LOCKED) { |
23f3e991 | 2081 | /* launched w/ TXT and VMX disabled */ |
cafd6659 SW |
2082 | if (!(msr & FEATURE_CONTROL_VMXON_ENABLED_INSIDE_SMX) |
2083 | && tboot_enabled()) | |
2084 | return 1; | |
23f3e991 | 2085 | /* launched w/o TXT and VMX only enabled w/ TXT */ |
cafd6659 | 2086 | if (!(msr & FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX) |
23f3e991 | 2087 | && (msr & FEATURE_CONTROL_VMXON_ENABLED_INSIDE_SMX) |
f9335afe SW |
2088 | && !tboot_enabled()) { |
2089 | printk(KERN_WARNING "kvm: disable TXT in the BIOS or " | |
23f3e991 | 2090 | "activate TXT before enabling KVM\n"); |
cafd6659 | 2091 | return 1; |
f9335afe | 2092 | } |
23f3e991 JC |
2093 | /* launched w/o TXT and VMX disabled */ |
2094 | if (!(msr & FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX) | |
2095 | && !tboot_enabled()) | |
2096 | return 1; | |
cafd6659 SW |
2097 | } |
2098 | ||
2099 | return 0; | |
6aa8b732 AK |
2100 | } |
2101 | ||
7725b894 DX |
2102 | static void kvm_cpu_vmxon(u64 addr) |
2103 | { | |
2104 | asm volatile (ASM_VMX_VMXON_RAX | |
2105 | : : "a"(&addr), "m"(addr) | |
2106 | : "memory", "cc"); | |
2107 | } | |
2108 | ||
10474ae8 | 2109 | static int hardware_enable(void *garbage) |
6aa8b732 AK |
2110 | { |
2111 | int cpu = raw_smp_processor_id(); | |
2112 | u64 phys_addr = __pa(per_cpu(vmxarea, cpu)); | |
cafd6659 | 2113 | u64 old, test_bits; |
6aa8b732 | 2114 | |
10474ae8 AG |
2115 | if (read_cr4() & X86_CR4_VMXE) |
2116 | return -EBUSY; | |
2117 | ||
d462b819 | 2118 | INIT_LIST_HEAD(&per_cpu(loaded_vmcss_on_cpu, cpu)); |
6aa8b732 | 2119 | rdmsrl(MSR_IA32_FEATURE_CONTROL, old); |
cafd6659 SW |
2120 | |
2121 | test_bits = FEATURE_CONTROL_LOCKED; | |
2122 | test_bits |= FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX; | |
2123 | if (tboot_enabled()) | |
2124 | test_bits |= FEATURE_CONTROL_VMXON_ENABLED_INSIDE_SMX; | |
2125 | ||
2126 | if ((old & test_bits) != test_bits) { | |
6aa8b732 | 2127 | /* enable and lock */ |
cafd6659 SW |
2128 | wrmsrl(MSR_IA32_FEATURE_CONTROL, old | test_bits); |
2129 | } | |
66aee91a | 2130 | write_cr4(read_cr4() | X86_CR4_VMXE); /* FIXME: not cpu hotplug safe */ |
10474ae8 | 2131 | |
4610c9cc DX |
2132 | if (vmm_exclusive) { |
2133 | kvm_cpu_vmxon(phys_addr); | |
2134 | ept_sync_global(); | |
2135 | } | |
10474ae8 | 2136 | |
3444d7da AK |
2137 | store_gdt(&__get_cpu_var(host_gdt)); |
2138 | ||
10474ae8 | 2139 | return 0; |
6aa8b732 AK |
2140 | } |
2141 | ||
d462b819 | 2142 | static void vmclear_local_loaded_vmcss(void) |
543e4243 AK |
2143 | { |
2144 | int cpu = raw_smp_processor_id(); | |
d462b819 | 2145 | struct loaded_vmcs *v, *n; |
543e4243 | 2146 | |
d462b819 NHE |
2147 | list_for_each_entry_safe(v, n, &per_cpu(loaded_vmcss_on_cpu, cpu), |
2148 | loaded_vmcss_on_cpu_link) | |
2149 | __loaded_vmcs_clear(v); | |
543e4243 AK |
2150 | } |
2151 | ||
710ff4a8 EH |
2152 | |
2153 | /* Just like cpu_vmxoff(), but with the __kvm_handle_fault_on_reboot() | |
2154 | * tricks. | |
2155 | */ | |
2156 | static void kvm_cpu_vmxoff(void) | |
6aa8b732 | 2157 | { |
4ecac3fd | 2158 | asm volatile (__ex(ASM_VMX_VMXOFF) : : : "cc"); |
6aa8b732 AK |
2159 | } |
2160 | ||
710ff4a8 EH |
2161 | static void hardware_disable(void *garbage) |
2162 | { | |
4610c9cc | 2163 | if (vmm_exclusive) { |
d462b819 | 2164 | vmclear_local_loaded_vmcss(); |
4610c9cc DX |
2165 | kvm_cpu_vmxoff(); |
2166 | } | |
7725b894 | 2167 | write_cr4(read_cr4() & ~X86_CR4_VMXE); |
710ff4a8 EH |
2168 | } |
2169 | ||
1c3d14fe | 2170 | static __init int adjust_vmx_controls(u32 ctl_min, u32 ctl_opt, |
d77c26fc | 2171 | u32 msr, u32 *result) |
1c3d14fe YS |
2172 | { |
2173 | u32 vmx_msr_low, vmx_msr_high; | |
2174 | u32 ctl = ctl_min | ctl_opt; | |
2175 | ||
2176 | rdmsr(msr, vmx_msr_low, vmx_msr_high); | |
2177 | ||
2178 | ctl &= vmx_msr_high; /* bit == 0 in high word ==> must be zero */ | |
2179 | ctl |= vmx_msr_low; /* bit == 1 in low word ==> must be one */ | |
2180 | ||
2181 | /* Ensure minimum (required) set of control bits are supported. */ | |
2182 | if (ctl_min & ~ctl) | |
002c7f7c | 2183 | return -EIO; |
1c3d14fe YS |
2184 | |
2185 | *result = ctl; | |
2186 | return 0; | |
2187 | } | |
2188 | ||
110312c8 AK |
2189 | static __init bool allow_1_setting(u32 msr, u32 ctl) |
2190 | { | |
2191 | u32 vmx_msr_low, vmx_msr_high; | |
2192 | ||
2193 | rdmsr(msr, vmx_msr_low, vmx_msr_high); | |
2194 | return vmx_msr_high & ctl; | |
2195 | } | |
2196 | ||
002c7f7c | 2197 | static __init int setup_vmcs_config(struct vmcs_config *vmcs_conf) |
6aa8b732 AK |
2198 | { |
2199 | u32 vmx_msr_low, vmx_msr_high; | |
d56f546d | 2200 | u32 min, opt, min2, opt2; |
1c3d14fe YS |
2201 | u32 _pin_based_exec_control = 0; |
2202 | u32 _cpu_based_exec_control = 0; | |
f78e0e2e | 2203 | u32 _cpu_based_2nd_exec_control = 0; |
1c3d14fe YS |
2204 | u32 _vmexit_control = 0; |
2205 | u32 _vmentry_control = 0; | |
2206 | ||
2207 | min = PIN_BASED_EXT_INTR_MASK | PIN_BASED_NMI_EXITING; | |
f08864b4 | 2208 | opt = PIN_BASED_VIRTUAL_NMIS; |
1c3d14fe YS |
2209 | if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_PINBASED_CTLS, |
2210 | &_pin_based_exec_control) < 0) | |
002c7f7c | 2211 | return -EIO; |
1c3d14fe | 2212 | |
443381a8 | 2213 | min = |
1c3d14fe YS |
2214 | #ifdef CONFIG_X86_64 |
2215 | CPU_BASED_CR8_LOAD_EXITING | | |
2216 | CPU_BASED_CR8_STORE_EXITING | | |
2217 | #endif | |
d56f546d SY |
2218 | CPU_BASED_CR3_LOAD_EXITING | |
2219 | CPU_BASED_CR3_STORE_EXITING | | |
1c3d14fe YS |
2220 | CPU_BASED_USE_IO_BITMAPS | |
2221 | CPU_BASED_MOV_DR_EXITING | | |
a7052897 | 2222 | CPU_BASED_USE_TSC_OFFSETING | |
59708670 SY |
2223 | CPU_BASED_MWAIT_EXITING | |
2224 | CPU_BASED_MONITOR_EXITING | | |
a7052897 | 2225 | CPU_BASED_INVLPG_EXITING; |
443381a8 AL |
2226 | |
2227 | if (yield_on_hlt) | |
2228 | min |= CPU_BASED_HLT_EXITING; | |
2229 | ||
f78e0e2e | 2230 | opt = CPU_BASED_TPR_SHADOW | |
25c5f225 | 2231 | CPU_BASED_USE_MSR_BITMAPS | |
f78e0e2e | 2232 | CPU_BASED_ACTIVATE_SECONDARY_CONTROLS; |
1c3d14fe YS |
2233 | if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_PROCBASED_CTLS, |
2234 | &_cpu_based_exec_control) < 0) | |
002c7f7c | 2235 | return -EIO; |
6e5d865c YS |
2236 | #ifdef CONFIG_X86_64 |
2237 | if ((_cpu_based_exec_control & CPU_BASED_TPR_SHADOW)) | |
2238 | _cpu_based_exec_control &= ~CPU_BASED_CR8_LOAD_EXITING & | |
2239 | ~CPU_BASED_CR8_STORE_EXITING; | |
2240 | #endif | |
f78e0e2e | 2241 | if (_cpu_based_exec_control & CPU_BASED_ACTIVATE_SECONDARY_CONTROLS) { |
d56f546d SY |
2242 | min2 = 0; |
2243 | opt2 = SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES | | |
2384d2b3 | 2244 | SECONDARY_EXEC_WBINVD_EXITING | |
d56f546d | 2245 | SECONDARY_EXEC_ENABLE_VPID | |
3a624e29 | 2246 | SECONDARY_EXEC_ENABLE_EPT | |
4b8d54f9 | 2247 | SECONDARY_EXEC_UNRESTRICTED_GUEST | |
4e47c7a6 SY |
2248 | SECONDARY_EXEC_PAUSE_LOOP_EXITING | |
2249 | SECONDARY_EXEC_RDTSCP; | |
d56f546d SY |
2250 | if (adjust_vmx_controls(min2, opt2, |
2251 | MSR_IA32_VMX_PROCBASED_CTLS2, | |
f78e0e2e SY |
2252 | &_cpu_based_2nd_exec_control) < 0) |
2253 | return -EIO; | |
2254 | } | |
2255 | #ifndef CONFIG_X86_64 | |
2256 | if (!(_cpu_based_2nd_exec_control & | |
2257 | SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES)) | |
2258 | _cpu_based_exec_control &= ~CPU_BASED_TPR_SHADOW; | |
2259 | #endif | |
d56f546d | 2260 | if (_cpu_based_2nd_exec_control & SECONDARY_EXEC_ENABLE_EPT) { |
a7052897 MT |
2261 | /* CR3 accesses and invlpg don't need to cause VM Exits when EPT |
2262 | enabled */ | |
5fff7d27 GN |
2263 | _cpu_based_exec_control &= ~(CPU_BASED_CR3_LOAD_EXITING | |
2264 | CPU_BASED_CR3_STORE_EXITING | | |
2265 | CPU_BASED_INVLPG_EXITING); | |
d56f546d SY |
2266 | rdmsr(MSR_IA32_VMX_EPT_VPID_CAP, |
2267 | vmx_capability.ept, vmx_capability.vpid); | |
2268 | } | |
1c3d14fe YS |
2269 | |
2270 | min = 0; | |
2271 | #ifdef CONFIG_X86_64 | |
2272 | min |= VM_EXIT_HOST_ADDR_SPACE_SIZE; | |
2273 | #endif | |
468d472f | 2274 | opt = VM_EXIT_SAVE_IA32_PAT | VM_EXIT_LOAD_IA32_PAT; |
1c3d14fe YS |
2275 | if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_EXIT_CTLS, |
2276 | &_vmexit_control) < 0) | |
002c7f7c | 2277 | return -EIO; |
1c3d14fe | 2278 | |
468d472f SY |
2279 | min = 0; |
2280 | opt = VM_ENTRY_LOAD_IA32_PAT; | |
1c3d14fe YS |
2281 | if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_ENTRY_CTLS, |
2282 | &_vmentry_control) < 0) | |
002c7f7c | 2283 | return -EIO; |
6aa8b732 | 2284 | |
c68876fd | 2285 | rdmsr(MSR_IA32_VMX_BASIC, vmx_msr_low, vmx_msr_high); |
1c3d14fe YS |
2286 | |
2287 | /* IA-32 SDM Vol 3B: VMCS size is never greater than 4kB. */ | |
2288 | if ((vmx_msr_high & 0x1fff) > PAGE_SIZE) | |
002c7f7c | 2289 | return -EIO; |
1c3d14fe YS |
2290 | |
2291 | #ifdef CONFIG_X86_64 | |
2292 | /* IA-32 SDM Vol 3B: 64-bit CPUs always have VMX_BASIC_MSR[48]==0. */ | |
2293 | if (vmx_msr_high & (1u<<16)) | |
002c7f7c | 2294 | return -EIO; |
1c3d14fe YS |
2295 | #endif |
2296 | ||
2297 | /* Require Write-Back (WB) memory type for VMCS accesses. */ | |
2298 | if (((vmx_msr_high >> 18) & 15) != 6) | |
002c7f7c | 2299 | return -EIO; |
1c3d14fe | 2300 | |
002c7f7c YS |
2301 | vmcs_conf->size = vmx_msr_high & 0x1fff; |
2302 | vmcs_conf->order = get_order(vmcs_config.size); | |
2303 | vmcs_conf->revision_id = vmx_msr_low; | |
1c3d14fe | 2304 | |
002c7f7c YS |
2305 | vmcs_conf->pin_based_exec_ctrl = _pin_based_exec_control; |
2306 | vmcs_conf->cpu_based_exec_ctrl = _cpu_based_exec_control; | |
f78e0e2e | 2307 | vmcs_conf->cpu_based_2nd_exec_ctrl = _cpu_based_2nd_exec_control; |
002c7f7c YS |
2308 | vmcs_conf->vmexit_ctrl = _vmexit_control; |
2309 | vmcs_conf->vmentry_ctrl = _vmentry_control; | |
1c3d14fe | 2310 | |
110312c8 AK |
2311 | cpu_has_load_ia32_efer = |
2312 | allow_1_setting(MSR_IA32_VMX_ENTRY_CTLS, | |
2313 | VM_ENTRY_LOAD_IA32_EFER) | |
2314 | && allow_1_setting(MSR_IA32_VMX_EXIT_CTLS, | |
2315 | VM_EXIT_LOAD_IA32_EFER); | |
2316 | ||
1c3d14fe | 2317 | return 0; |
c68876fd | 2318 | } |
6aa8b732 AK |
2319 | |
2320 | static struct vmcs *alloc_vmcs_cpu(int cpu) | |
2321 | { | |
2322 | int node = cpu_to_node(cpu); | |
2323 | struct page *pages; | |
2324 | struct vmcs *vmcs; | |
2325 | ||
6484eb3e | 2326 | pages = alloc_pages_exact_node(node, GFP_KERNEL, vmcs_config.order); |
6aa8b732 AK |
2327 | if (!pages) |
2328 | return NULL; | |
2329 | vmcs = page_address(pages); | |
1c3d14fe YS |
2330 | memset(vmcs, 0, vmcs_config.size); |
2331 | vmcs->revision_id = vmcs_config.revision_id; /* vmcs revision id */ | |
6aa8b732 AK |
2332 | return vmcs; |
2333 | } | |
2334 | ||
2335 | static struct vmcs *alloc_vmcs(void) | |
2336 | { | |
d3b2c338 | 2337 | return alloc_vmcs_cpu(raw_smp_processor_id()); |
6aa8b732 AK |
2338 | } |
2339 | ||
2340 | static void free_vmcs(struct vmcs *vmcs) | |
2341 | { | |
1c3d14fe | 2342 | free_pages((unsigned long)vmcs, vmcs_config.order); |
6aa8b732 AK |
2343 | } |
2344 | ||
d462b819 NHE |
2345 | /* |
2346 | * Free a VMCS, but before that VMCLEAR it on the CPU where it was last loaded | |
2347 | */ | |
2348 | static void free_loaded_vmcs(struct loaded_vmcs *loaded_vmcs) | |
2349 | { | |
2350 | if (!loaded_vmcs->vmcs) | |
2351 | return; | |
2352 | loaded_vmcs_clear(loaded_vmcs); | |
2353 | free_vmcs(loaded_vmcs->vmcs); | |
2354 | loaded_vmcs->vmcs = NULL; | |
2355 | } | |
2356 | ||
39959588 | 2357 | static void free_kvm_area(void) |
6aa8b732 AK |
2358 | { |
2359 | int cpu; | |
2360 | ||
3230bb47 | 2361 | for_each_possible_cpu(cpu) { |
6aa8b732 | 2362 | free_vmcs(per_cpu(vmxarea, cpu)); |
3230bb47 ZA |
2363 | per_cpu(vmxarea, cpu) = NULL; |
2364 | } | |
6aa8b732 AK |
2365 | } |
2366 | ||
6aa8b732 AK |
2367 | static __init int alloc_kvm_area(void) |
2368 | { | |
2369 | int cpu; | |
2370 | ||
3230bb47 | 2371 | for_each_possible_cpu(cpu) { |
6aa8b732 AK |
2372 | struct vmcs *vmcs; |
2373 | ||
2374 | vmcs = alloc_vmcs_cpu(cpu); | |
2375 | if (!vmcs) { | |
2376 | free_kvm_area(); | |
2377 | return -ENOMEM; | |
2378 | } | |
2379 | ||
2380 | per_cpu(vmxarea, cpu) = vmcs; | |
2381 | } | |
2382 | return 0; | |
2383 | } | |
2384 | ||
2385 | static __init int hardware_setup(void) | |
2386 | { | |
002c7f7c YS |
2387 | if (setup_vmcs_config(&vmcs_config) < 0) |
2388 | return -EIO; | |
50a37eb4 JR |
2389 | |
2390 | if (boot_cpu_has(X86_FEATURE_NX)) | |
2391 | kvm_enable_efer_bits(EFER_NX); | |
2392 | ||
93ba03c2 SY |
2393 | if (!cpu_has_vmx_vpid()) |
2394 | enable_vpid = 0; | |
2395 | ||
4bc9b982 SY |
2396 | if (!cpu_has_vmx_ept() || |
2397 | !cpu_has_vmx_ept_4levels()) { | |
93ba03c2 | 2398 | enable_ept = 0; |
3a624e29 NK |
2399 | enable_unrestricted_guest = 0; |
2400 | } | |
2401 | ||
2402 | if (!cpu_has_vmx_unrestricted_guest()) | |
2403 | enable_unrestricted_guest = 0; | |
93ba03c2 SY |
2404 | |
2405 | if (!cpu_has_vmx_flexpriority()) | |
2406 | flexpriority_enabled = 0; | |
2407 | ||
95ba8273 GN |
2408 | if (!cpu_has_vmx_tpr_shadow()) |
2409 | kvm_x86_ops->update_cr8_intercept = NULL; | |
2410 | ||
54dee993 MT |
2411 | if (enable_ept && !cpu_has_vmx_ept_2m_page()) |
2412 | kvm_disable_largepages(); | |
2413 | ||
4b8d54f9 ZE |
2414 | if (!cpu_has_vmx_ple()) |
2415 | ple_gap = 0; | |
2416 | ||
b87a51ae NHE |
2417 | if (nested) |
2418 | nested_vmx_setup_ctls_msrs(); | |
2419 | ||
6aa8b732 AK |
2420 | return alloc_kvm_area(); |
2421 | } | |
2422 | ||
2423 | static __exit void hardware_unsetup(void) | |
2424 | { | |
2425 | free_kvm_area(); | |
2426 | } | |
2427 | ||
6aa8b732 AK |
2428 | static void fix_pmode_dataseg(int seg, struct kvm_save_segment *save) |
2429 | { | |
2430 | struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; | |
2431 | ||
6af11b9e | 2432 | if (vmcs_readl(sf->base) == save->base && (save->base & AR_S_MASK)) { |
6aa8b732 AK |
2433 | vmcs_write16(sf->selector, save->selector); |
2434 | vmcs_writel(sf->base, save->base); | |
2435 | vmcs_write32(sf->limit, save->limit); | |
2436 | vmcs_write32(sf->ar_bytes, save->ar); | |
2437 | } else { | |
2438 | u32 dpl = (vmcs_read16(sf->selector) & SELECTOR_RPL_MASK) | |
2439 | << AR_DPL_SHIFT; | |
2440 | vmcs_write32(sf->ar_bytes, 0x93 | dpl); | |
2441 | } | |
2442 | } | |
2443 | ||
2444 | static void enter_pmode(struct kvm_vcpu *vcpu) | |
2445 | { | |
2446 | unsigned long flags; | |
a89a8fb9 | 2447 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
6aa8b732 | 2448 | |
a89a8fb9 | 2449 | vmx->emulation_required = 1; |
7ffd92c5 | 2450 | vmx->rmode.vm86_active = 0; |
6aa8b732 | 2451 | |
2fb92db1 AK |
2452 | vmx_segment_cache_clear(vmx); |
2453 | ||
d0ba64f9 | 2454 | vmcs_write16(GUEST_TR_SELECTOR, vmx->rmode.tr.selector); |
7ffd92c5 AK |
2455 | vmcs_writel(GUEST_TR_BASE, vmx->rmode.tr.base); |
2456 | vmcs_write32(GUEST_TR_LIMIT, vmx->rmode.tr.limit); | |
2457 | vmcs_write32(GUEST_TR_AR_BYTES, vmx->rmode.tr.ar); | |
6aa8b732 AK |
2458 | |
2459 | flags = vmcs_readl(GUEST_RFLAGS); | |
78ac8b47 AK |
2460 | flags &= RMODE_GUEST_OWNED_EFLAGS_BITS; |
2461 | flags |= vmx->rmode.save_rflags & ~RMODE_GUEST_OWNED_EFLAGS_BITS; | |
6aa8b732 AK |
2462 | vmcs_writel(GUEST_RFLAGS, flags); |
2463 | ||
66aee91a RR |
2464 | vmcs_writel(GUEST_CR4, (vmcs_readl(GUEST_CR4) & ~X86_CR4_VME) | |
2465 | (vmcs_readl(CR4_READ_SHADOW) & X86_CR4_VME)); | |
6aa8b732 AK |
2466 | |
2467 | update_exception_bitmap(vcpu); | |
2468 | ||
a89a8fb9 MG |
2469 | if (emulate_invalid_guest_state) |
2470 | return; | |
2471 | ||
7ffd92c5 AK |
2472 | fix_pmode_dataseg(VCPU_SREG_ES, &vmx->rmode.es); |
2473 | fix_pmode_dataseg(VCPU_SREG_DS, &vmx->rmode.ds); | |
2474 | fix_pmode_dataseg(VCPU_SREG_GS, &vmx->rmode.gs); | |
2475 | fix_pmode_dataseg(VCPU_SREG_FS, &vmx->rmode.fs); | |
6aa8b732 | 2476 | |
2fb92db1 AK |
2477 | vmx_segment_cache_clear(vmx); |
2478 | ||
6aa8b732 AK |
2479 | vmcs_write16(GUEST_SS_SELECTOR, 0); |
2480 | vmcs_write32(GUEST_SS_AR_BYTES, 0x93); | |
2481 | ||
2482 | vmcs_write16(GUEST_CS_SELECTOR, | |
2483 | vmcs_read16(GUEST_CS_SELECTOR) & ~SELECTOR_RPL_MASK); | |
2484 | vmcs_write32(GUEST_CS_AR_BYTES, 0x9b); | |
2485 | } | |
2486 | ||
d77c26fc | 2487 | static gva_t rmode_tss_base(struct kvm *kvm) |
6aa8b732 | 2488 | { |
bfc6d222 | 2489 | if (!kvm->arch.tss_addr) { |
bc6678a3 MT |
2490 | struct kvm_memslots *slots; |
2491 | gfn_t base_gfn; | |
2492 | ||
90d83dc3 | 2493 | slots = kvm_memslots(kvm); |
f495c6e5 | 2494 | base_gfn = slots->memslots[0].base_gfn + |
46a26bf5 | 2495 | kvm->memslots->memslots[0].npages - 3; |
cbc94022 IE |
2496 | return base_gfn << PAGE_SHIFT; |
2497 | } | |
bfc6d222 | 2498 | return kvm->arch.tss_addr; |
6aa8b732 AK |
2499 | } |
2500 | ||
2501 | static void fix_rmode_seg(int seg, struct kvm_save_segment *save) | |
2502 | { | |
2503 | struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; | |
2504 | ||
2505 | save->selector = vmcs_read16(sf->selector); | |
2506 | save->base = vmcs_readl(sf->base); | |
2507 | save->limit = vmcs_read32(sf->limit); | |
2508 | save->ar = vmcs_read32(sf->ar_bytes); | |
15b00f32 | 2509 | vmcs_write16(sf->selector, save->base >> 4); |
444e863d | 2510 | vmcs_write32(sf->base, save->base & 0xffff0); |
6aa8b732 AK |
2511 | vmcs_write32(sf->limit, 0xffff); |
2512 | vmcs_write32(sf->ar_bytes, 0xf3); | |
444e863d GN |
2513 | if (save->base & 0xf) |
2514 | printk_once(KERN_WARNING "kvm: segment base is not paragraph" | |
2515 | " aligned when entering protected mode (seg=%d)", | |
2516 | seg); | |
6aa8b732 AK |
2517 | } |
2518 | ||
2519 | static void enter_rmode(struct kvm_vcpu *vcpu) | |
2520 | { | |
2521 | unsigned long flags; | |
a89a8fb9 | 2522 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
6aa8b732 | 2523 | |
3a624e29 NK |
2524 | if (enable_unrestricted_guest) |
2525 | return; | |
2526 | ||
a89a8fb9 | 2527 | vmx->emulation_required = 1; |
7ffd92c5 | 2528 | vmx->rmode.vm86_active = 1; |
6aa8b732 | 2529 | |
776e58ea GN |
2530 | /* |
2531 | * Very old userspace does not call KVM_SET_TSS_ADDR before entering | |
2532 | * vcpu. Call it here with phys address pointing 16M below 4G. | |
2533 | */ | |
2534 | if (!vcpu->kvm->arch.tss_addr) { | |
2535 | printk_once(KERN_WARNING "kvm: KVM_SET_TSS_ADDR need to be " | |
2536 | "called before entering vcpu\n"); | |
2537 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); | |
2538 | vmx_set_tss_addr(vcpu->kvm, 0xfeffd000); | |
2539 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); | |
2540 | } | |
2541 | ||
2fb92db1 AK |
2542 | vmx_segment_cache_clear(vmx); |
2543 | ||
d0ba64f9 | 2544 | vmx->rmode.tr.selector = vmcs_read16(GUEST_TR_SELECTOR); |
7ffd92c5 | 2545 | vmx->rmode.tr.base = vmcs_readl(GUEST_TR_BASE); |
6aa8b732 AK |
2546 | vmcs_writel(GUEST_TR_BASE, rmode_tss_base(vcpu->kvm)); |
2547 | ||
7ffd92c5 | 2548 | vmx->rmode.tr.limit = vmcs_read32(GUEST_TR_LIMIT); |
6aa8b732 AK |
2549 | vmcs_write32(GUEST_TR_LIMIT, RMODE_TSS_SIZE - 1); |
2550 | ||
7ffd92c5 | 2551 | vmx->rmode.tr.ar = vmcs_read32(GUEST_TR_AR_BYTES); |
6aa8b732 AK |
2552 | vmcs_write32(GUEST_TR_AR_BYTES, 0x008b); |
2553 | ||
2554 | flags = vmcs_readl(GUEST_RFLAGS); | |
78ac8b47 | 2555 | vmx->rmode.save_rflags = flags; |
6aa8b732 | 2556 | |
053de044 | 2557 | flags |= X86_EFLAGS_IOPL | X86_EFLAGS_VM; |
6aa8b732 AK |
2558 | |
2559 | vmcs_writel(GUEST_RFLAGS, flags); | |
66aee91a | 2560 | vmcs_writel(GUEST_CR4, vmcs_readl(GUEST_CR4) | X86_CR4_VME); |
6aa8b732 AK |
2561 | update_exception_bitmap(vcpu); |
2562 | ||
a89a8fb9 MG |
2563 | if (emulate_invalid_guest_state) |
2564 | goto continue_rmode; | |
2565 | ||
6aa8b732 AK |
2566 | vmcs_write16(GUEST_SS_SELECTOR, vmcs_readl(GUEST_SS_BASE) >> 4); |
2567 | vmcs_write32(GUEST_SS_LIMIT, 0xffff); | |
2568 | vmcs_write32(GUEST_SS_AR_BYTES, 0xf3); | |
2569 | ||
2570 | vmcs_write32(GUEST_CS_AR_BYTES, 0xf3); | |
abacf8df | 2571 | vmcs_write32(GUEST_CS_LIMIT, 0xffff); |
8cb5b033 AK |
2572 | if (vmcs_readl(GUEST_CS_BASE) == 0xffff0000) |
2573 | vmcs_writel(GUEST_CS_BASE, 0xf0000); | |
6aa8b732 AK |
2574 | vmcs_write16(GUEST_CS_SELECTOR, vmcs_readl(GUEST_CS_BASE) >> 4); |
2575 | ||
7ffd92c5 AK |
2576 | fix_rmode_seg(VCPU_SREG_ES, &vmx->rmode.es); |
2577 | fix_rmode_seg(VCPU_SREG_DS, &vmx->rmode.ds); | |
2578 | fix_rmode_seg(VCPU_SREG_GS, &vmx->rmode.gs); | |
2579 | fix_rmode_seg(VCPU_SREG_FS, &vmx->rmode.fs); | |
75880a01 | 2580 | |
a89a8fb9 | 2581 | continue_rmode: |
8668a3c4 | 2582 | kvm_mmu_reset_context(vcpu); |
6aa8b732 AK |
2583 | } |
2584 | ||
401d10de AS |
2585 | static void vmx_set_efer(struct kvm_vcpu *vcpu, u64 efer) |
2586 | { | |
2587 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
26bb0981 AK |
2588 | struct shared_msr_entry *msr = find_msr_entry(vmx, MSR_EFER); |
2589 | ||
2590 | if (!msr) | |
2591 | return; | |
401d10de | 2592 | |
44ea2b17 AK |
2593 | /* |
2594 | * Force kernel_gs_base reloading before EFER changes, as control | |
2595 | * of this msr depends on is_long_mode(). | |
2596 | */ | |
2597 | vmx_load_host_state(to_vmx(vcpu)); | |
f6801dff | 2598 | vcpu->arch.efer = efer; |
401d10de AS |
2599 | if (efer & EFER_LMA) { |
2600 | vmcs_write32(VM_ENTRY_CONTROLS, | |
2601 | vmcs_read32(VM_ENTRY_CONTROLS) | | |
2602 | VM_ENTRY_IA32E_MODE); | |
2603 | msr->data = efer; | |
2604 | } else { | |
2605 | vmcs_write32(VM_ENTRY_CONTROLS, | |
2606 | vmcs_read32(VM_ENTRY_CONTROLS) & | |
2607 | ~VM_ENTRY_IA32E_MODE); | |
2608 | ||
2609 | msr->data = efer & ~EFER_LME; | |
2610 | } | |
2611 | setup_msrs(vmx); | |
2612 | } | |
2613 | ||
05b3e0c2 | 2614 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
2615 | |
2616 | static void enter_lmode(struct kvm_vcpu *vcpu) | |
2617 | { | |
2618 | u32 guest_tr_ar; | |
2619 | ||
2fb92db1 AK |
2620 | vmx_segment_cache_clear(to_vmx(vcpu)); |
2621 | ||
6aa8b732 AK |
2622 | guest_tr_ar = vmcs_read32(GUEST_TR_AR_BYTES); |
2623 | if ((guest_tr_ar & AR_TYPE_MASK) != AR_TYPE_BUSY_64_TSS) { | |
2624 | printk(KERN_DEBUG "%s: tss fixup for long mode. \n", | |
b8688d51 | 2625 | __func__); |
6aa8b732 AK |
2626 | vmcs_write32(GUEST_TR_AR_BYTES, |
2627 | (guest_tr_ar & ~AR_TYPE_MASK) | |
2628 | | AR_TYPE_BUSY_64_TSS); | |
2629 | } | |
da38f438 | 2630 | vmx_set_efer(vcpu, vcpu->arch.efer | EFER_LMA); |
6aa8b732 AK |
2631 | } |
2632 | ||
2633 | static void exit_lmode(struct kvm_vcpu *vcpu) | |
2634 | { | |
6aa8b732 AK |
2635 | vmcs_write32(VM_ENTRY_CONTROLS, |
2636 | vmcs_read32(VM_ENTRY_CONTROLS) | |
1e4e6e00 | 2637 | & ~VM_ENTRY_IA32E_MODE); |
da38f438 | 2638 | vmx_set_efer(vcpu, vcpu->arch.efer & ~EFER_LMA); |
6aa8b732 AK |
2639 | } |
2640 | ||
2641 | #endif | |
2642 | ||
2384d2b3 SY |
2643 | static void vmx_flush_tlb(struct kvm_vcpu *vcpu) |
2644 | { | |
b9d762fa | 2645 | vpid_sync_context(to_vmx(vcpu)); |
dd180b3e XG |
2646 | if (enable_ept) { |
2647 | if (!VALID_PAGE(vcpu->arch.mmu.root_hpa)) | |
2648 | return; | |
4e1096d2 | 2649 | ept_sync_context(construct_eptp(vcpu->arch.mmu.root_hpa)); |
dd180b3e | 2650 | } |
2384d2b3 SY |
2651 | } |
2652 | ||
e8467fda AK |
2653 | static void vmx_decache_cr0_guest_bits(struct kvm_vcpu *vcpu) |
2654 | { | |
2655 | ulong cr0_guest_owned_bits = vcpu->arch.cr0_guest_owned_bits; | |
2656 | ||
2657 | vcpu->arch.cr0 &= ~cr0_guest_owned_bits; | |
2658 | vcpu->arch.cr0 |= vmcs_readl(GUEST_CR0) & cr0_guest_owned_bits; | |
2659 | } | |
2660 | ||
aff48baa AK |
2661 | static void vmx_decache_cr3(struct kvm_vcpu *vcpu) |
2662 | { | |
2663 | if (enable_ept && is_paging(vcpu)) | |
2664 | vcpu->arch.cr3 = vmcs_readl(GUEST_CR3); | |
2665 | __set_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail); | |
2666 | } | |
2667 | ||
25c4c276 | 2668 | static void vmx_decache_cr4_guest_bits(struct kvm_vcpu *vcpu) |
399badf3 | 2669 | { |
fc78f519 AK |
2670 | ulong cr4_guest_owned_bits = vcpu->arch.cr4_guest_owned_bits; |
2671 | ||
2672 | vcpu->arch.cr4 &= ~cr4_guest_owned_bits; | |
2673 | vcpu->arch.cr4 |= vmcs_readl(GUEST_CR4) & cr4_guest_owned_bits; | |
399badf3 AK |
2674 | } |
2675 | ||
1439442c SY |
2676 | static void ept_load_pdptrs(struct kvm_vcpu *vcpu) |
2677 | { | |
6de4f3ad AK |
2678 | if (!test_bit(VCPU_EXREG_PDPTR, |
2679 | (unsigned long *)&vcpu->arch.regs_dirty)) | |
2680 | return; | |
2681 | ||
1439442c | 2682 | if (is_paging(vcpu) && is_pae(vcpu) && !is_long_mode(vcpu)) { |
ff03a073 JR |
2683 | vmcs_write64(GUEST_PDPTR0, vcpu->arch.mmu.pdptrs[0]); |
2684 | vmcs_write64(GUEST_PDPTR1, vcpu->arch.mmu.pdptrs[1]); | |
2685 | vmcs_write64(GUEST_PDPTR2, vcpu->arch.mmu.pdptrs[2]); | |
2686 | vmcs_write64(GUEST_PDPTR3, vcpu->arch.mmu.pdptrs[3]); | |
1439442c SY |
2687 | } |
2688 | } | |
2689 | ||
8f5d549f AK |
2690 | static void ept_save_pdptrs(struct kvm_vcpu *vcpu) |
2691 | { | |
2692 | if (is_paging(vcpu) && is_pae(vcpu) && !is_long_mode(vcpu)) { | |
ff03a073 JR |
2693 | vcpu->arch.mmu.pdptrs[0] = vmcs_read64(GUEST_PDPTR0); |
2694 | vcpu->arch.mmu.pdptrs[1] = vmcs_read64(GUEST_PDPTR1); | |
2695 | vcpu->arch.mmu.pdptrs[2] = vmcs_read64(GUEST_PDPTR2); | |
2696 | vcpu->arch.mmu.pdptrs[3] = vmcs_read64(GUEST_PDPTR3); | |
8f5d549f | 2697 | } |
6de4f3ad AK |
2698 | |
2699 | __set_bit(VCPU_EXREG_PDPTR, | |
2700 | (unsigned long *)&vcpu->arch.regs_avail); | |
2701 | __set_bit(VCPU_EXREG_PDPTR, | |
2702 | (unsigned long *)&vcpu->arch.regs_dirty); | |
8f5d549f AK |
2703 | } |
2704 | ||
5e1746d6 | 2705 | static int vmx_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4); |
1439442c SY |
2706 | |
2707 | static void ept_update_paging_mode_cr0(unsigned long *hw_cr0, | |
2708 | unsigned long cr0, | |
2709 | struct kvm_vcpu *vcpu) | |
2710 | { | |
5233dd51 MT |
2711 | if (!test_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail)) |
2712 | vmx_decache_cr3(vcpu); | |
1439442c SY |
2713 | if (!(cr0 & X86_CR0_PG)) { |
2714 | /* From paging/starting to nonpaging */ | |
2715 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, | |
65267ea1 | 2716 | vmcs_read32(CPU_BASED_VM_EXEC_CONTROL) | |
1439442c SY |
2717 | (CPU_BASED_CR3_LOAD_EXITING | |
2718 | CPU_BASED_CR3_STORE_EXITING)); | |
2719 | vcpu->arch.cr0 = cr0; | |
fc78f519 | 2720 | vmx_set_cr4(vcpu, kvm_read_cr4(vcpu)); |
1439442c SY |
2721 | } else if (!is_paging(vcpu)) { |
2722 | /* From nonpaging to paging */ | |
2723 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, | |
65267ea1 | 2724 | vmcs_read32(CPU_BASED_VM_EXEC_CONTROL) & |
1439442c SY |
2725 | ~(CPU_BASED_CR3_LOAD_EXITING | |
2726 | CPU_BASED_CR3_STORE_EXITING)); | |
2727 | vcpu->arch.cr0 = cr0; | |
fc78f519 | 2728 | vmx_set_cr4(vcpu, kvm_read_cr4(vcpu)); |
1439442c | 2729 | } |
95eb84a7 SY |
2730 | |
2731 | if (!(cr0 & X86_CR0_WP)) | |
2732 | *hw_cr0 &= ~X86_CR0_WP; | |
1439442c SY |
2733 | } |
2734 | ||
6aa8b732 AK |
2735 | static void vmx_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) |
2736 | { | |
7ffd92c5 | 2737 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
3a624e29 NK |
2738 | unsigned long hw_cr0; |
2739 | ||
2740 | if (enable_unrestricted_guest) | |
2741 | hw_cr0 = (cr0 & ~KVM_GUEST_CR0_MASK_UNRESTRICTED_GUEST) | |
2742 | | KVM_VM_CR0_ALWAYS_ON_UNRESTRICTED_GUEST; | |
2743 | else | |
2744 | hw_cr0 = (cr0 & ~KVM_GUEST_CR0_MASK) | KVM_VM_CR0_ALWAYS_ON; | |
1439442c | 2745 | |
7ffd92c5 | 2746 | if (vmx->rmode.vm86_active && (cr0 & X86_CR0_PE)) |
6aa8b732 AK |
2747 | enter_pmode(vcpu); |
2748 | ||
7ffd92c5 | 2749 | if (!vmx->rmode.vm86_active && !(cr0 & X86_CR0_PE)) |
6aa8b732 AK |
2750 | enter_rmode(vcpu); |
2751 | ||
05b3e0c2 | 2752 | #ifdef CONFIG_X86_64 |
f6801dff | 2753 | if (vcpu->arch.efer & EFER_LME) { |
707d92fa | 2754 | if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) |
6aa8b732 | 2755 | enter_lmode(vcpu); |
707d92fa | 2756 | if (is_paging(vcpu) && !(cr0 & X86_CR0_PG)) |
6aa8b732 AK |
2757 | exit_lmode(vcpu); |
2758 | } | |
2759 | #endif | |
2760 | ||
089d034e | 2761 | if (enable_ept) |
1439442c SY |
2762 | ept_update_paging_mode_cr0(&hw_cr0, cr0, vcpu); |
2763 | ||
02daab21 | 2764 | if (!vcpu->fpu_active) |
81231c69 | 2765 | hw_cr0 |= X86_CR0_TS | X86_CR0_MP; |
02daab21 | 2766 | |
6aa8b732 | 2767 | vmcs_writel(CR0_READ_SHADOW, cr0); |
1439442c | 2768 | vmcs_writel(GUEST_CR0, hw_cr0); |
ad312c7c | 2769 | vcpu->arch.cr0 = cr0; |
69c73028 | 2770 | __clear_bit(VCPU_EXREG_CPL, (ulong *)&vcpu->arch.regs_avail); |
6aa8b732 AK |
2771 | } |
2772 | ||
1439442c SY |
2773 | static u64 construct_eptp(unsigned long root_hpa) |
2774 | { | |
2775 | u64 eptp; | |
2776 | ||
2777 | /* TODO write the value reading from MSR */ | |
2778 | eptp = VMX_EPT_DEFAULT_MT | | |
2779 | VMX_EPT_DEFAULT_GAW << VMX_EPT_GAW_EPTP_SHIFT; | |
2780 | eptp |= (root_hpa & PAGE_MASK); | |
2781 | ||
2782 | return eptp; | |
2783 | } | |
2784 | ||
6aa8b732 AK |
2785 | static void vmx_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3) |
2786 | { | |
1439442c SY |
2787 | unsigned long guest_cr3; |
2788 | u64 eptp; | |
2789 | ||
2790 | guest_cr3 = cr3; | |
089d034e | 2791 | if (enable_ept) { |
1439442c SY |
2792 | eptp = construct_eptp(cr3); |
2793 | vmcs_write64(EPT_POINTER, eptp); | |
9f8fe504 | 2794 | guest_cr3 = is_paging(vcpu) ? kvm_read_cr3(vcpu) : |
b927a3ce | 2795 | vcpu->kvm->arch.ept_identity_map_addr; |
7c93be44 | 2796 | ept_load_pdptrs(vcpu); |
1439442c SY |
2797 | } |
2798 | ||
2384d2b3 | 2799 | vmx_flush_tlb(vcpu); |
1439442c | 2800 | vmcs_writel(GUEST_CR3, guest_cr3); |
6aa8b732 AK |
2801 | } |
2802 | ||
5e1746d6 | 2803 | static int vmx_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4) |
6aa8b732 | 2804 | { |
7ffd92c5 | 2805 | unsigned long hw_cr4 = cr4 | (to_vmx(vcpu)->rmode.vm86_active ? |
1439442c SY |
2806 | KVM_RMODE_VM_CR4_ALWAYS_ON : KVM_PMODE_VM_CR4_ALWAYS_ON); |
2807 | ||
5e1746d6 NHE |
2808 | if (cr4 & X86_CR4_VMXE) { |
2809 | /* | |
2810 | * To use VMXON (and later other VMX instructions), a guest | |
2811 | * must first be able to turn on cr4.VMXE (see handle_vmon()). | |
2812 | * So basically the check on whether to allow nested VMX | |
2813 | * is here. | |
2814 | */ | |
2815 | if (!nested_vmx_allowed(vcpu)) | |
2816 | return 1; | |
2817 | } else if (to_vmx(vcpu)->nested.vmxon) | |
2818 | return 1; | |
2819 | ||
ad312c7c | 2820 | vcpu->arch.cr4 = cr4; |
bc23008b AK |
2821 | if (enable_ept) { |
2822 | if (!is_paging(vcpu)) { | |
2823 | hw_cr4 &= ~X86_CR4_PAE; | |
2824 | hw_cr4 |= X86_CR4_PSE; | |
2825 | } else if (!(cr4 & X86_CR4_PAE)) { | |
2826 | hw_cr4 &= ~X86_CR4_PAE; | |
2827 | } | |
2828 | } | |
1439442c SY |
2829 | |
2830 | vmcs_writel(CR4_READ_SHADOW, cr4); | |
2831 | vmcs_writel(GUEST_CR4, hw_cr4); | |
5e1746d6 | 2832 | return 0; |
6aa8b732 AK |
2833 | } |
2834 | ||
6aa8b732 AK |
2835 | static void vmx_get_segment(struct kvm_vcpu *vcpu, |
2836 | struct kvm_segment *var, int seg) | |
2837 | { | |
a9179499 | 2838 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
a9179499 | 2839 | struct kvm_save_segment *save; |
6aa8b732 AK |
2840 | u32 ar; |
2841 | ||
a9179499 AK |
2842 | if (vmx->rmode.vm86_active |
2843 | && (seg == VCPU_SREG_TR || seg == VCPU_SREG_ES | |
2844 | || seg == VCPU_SREG_DS || seg == VCPU_SREG_FS | |
2845 | || seg == VCPU_SREG_GS) | |
2846 | && !emulate_invalid_guest_state) { | |
2847 | switch (seg) { | |
2848 | case VCPU_SREG_TR: save = &vmx->rmode.tr; break; | |
2849 | case VCPU_SREG_ES: save = &vmx->rmode.es; break; | |
2850 | case VCPU_SREG_DS: save = &vmx->rmode.ds; break; | |
2851 | case VCPU_SREG_FS: save = &vmx->rmode.fs; break; | |
2852 | case VCPU_SREG_GS: save = &vmx->rmode.gs; break; | |
2853 | default: BUG(); | |
2854 | } | |
2855 | var->selector = save->selector; | |
2856 | var->base = save->base; | |
2857 | var->limit = save->limit; | |
2858 | ar = save->ar; | |
2859 | if (seg == VCPU_SREG_TR | |
2fb92db1 | 2860 | || var->selector == vmx_read_guest_seg_selector(vmx, seg)) |
a9179499 AK |
2861 | goto use_saved_rmode_seg; |
2862 | } | |
2fb92db1 AK |
2863 | var->base = vmx_read_guest_seg_base(vmx, seg); |
2864 | var->limit = vmx_read_guest_seg_limit(vmx, seg); | |
2865 | var->selector = vmx_read_guest_seg_selector(vmx, seg); | |
2866 | ar = vmx_read_guest_seg_ar(vmx, seg); | |
a9179499 | 2867 | use_saved_rmode_seg: |
9fd4a3b7 | 2868 | if ((ar & AR_UNUSABLE_MASK) && !emulate_invalid_guest_state) |
6aa8b732 AK |
2869 | ar = 0; |
2870 | var->type = ar & 15; | |
2871 | var->s = (ar >> 4) & 1; | |
2872 | var->dpl = (ar >> 5) & 3; | |
2873 | var->present = (ar >> 7) & 1; | |
2874 | var->avl = (ar >> 12) & 1; | |
2875 | var->l = (ar >> 13) & 1; | |
2876 | var->db = (ar >> 14) & 1; | |
2877 | var->g = (ar >> 15) & 1; | |
2878 | var->unusable = (ar >> 16) & 1; | |
2879 | } | |
2880 | ||
a9179499 AK |
2881 | static u64 vmx_get_segment_base(struct kvm_vcpu *vcpu, int seg) |
2882 | { | |
a9179499 AK |
2883 | struct kvm_segment s; |
2884 | ||
2885 | if (to_vmx(vcpu)->rmode.vm86_active) { | |
2886 | vmx_get_segment(vcpu, &s, seg); | |
2887 | return s.base; | |
2888 | } | |
2fb92db1 | 2889 | return vmx_read_guest_seg_base(to_vmx(vcpu), seg); |
a9179499 AK |
2890 | } |
2891 | ||
69c73028 | 2892 | static int __vmx_get_cpl(struct kvm_vcpu *vcpu) |
2e4d2653 | 2893 | { |
3eeb3288 | 2894 | if (!is_protmode(vcpu)) |
2e4d2653 IE |
2895 | return 0; |
2896 | ||
f4c63e5d AK |
2897 | if (!is_long_mode(vcpu) |
2898 | && (kvm_get_rflags(vcpu) & X86_EFLAGS_VM)) /* if virtual 8086 */ | |
2e4d2653 IE |
2899 | return 3; |
2900 | ||
2fb92db1 | 2901 | return vmx_read_guest_seg_selector(to_vmx(vcpu), VCPU_SREG_CS) & 3; |
2e4d2653 IE |
2902 | } |
2903 | ||
69c73028 AK |
2904 | static int vmx_get_cpl(struct kvm_vcpu *vcpu) |
2905 | { | |
2906 | if (!test_bit(VCPU_EXREG_CPL, (ulong *)&vcpu->arch.regs_avail)) { | |
2907 | __set_bit(VCPU_EXREG_CPL, (ulong *)&vcpu->arch.regs_avail); | |
2908 | to_vmx(vcpu)->cpl = __vmx_get_cpl(vcpu); | |
2909 | } | |
2910 | return to_vmx(vcpu)->cpl; | |
2911 | } | |
2912 | ||
2913 | ||
653e3108 | 2914 | static u32 vmx_segment_access_rights(struct kvm_segment *var) |
6aa8b732 | 2915 | { |
6aa8b732 AK |
2916 | u32 ar; |
2917 | ||
653e3108 | 2918 | if (var->unusable) |
6aa8b732 AK |
2919 | ar = 1 << 16; |
2920 | else { | |
2921 | ar = var->type & 15; | |
2922 | ar |= (var->s & 1) << 4; | |
2923 | ar |= (var->dpl & 3) << 5; | |
2924 | ar |= (var->present & 1) << 7; | |
2925 | ar |= (var->avl & 1) << 12; | |
2926 | ar |= (var->l & 1) << 13; | |
2927 | ar |= (var->db & 1) << 14; | |
2928 | ar |= (var->g & 1) << 15; | |
2929 | } | |
f7fbf1fd UL |
2930 | if (ar == 0) /* a 0 value means unusable */ |
2931 | ar = AR_UNUSABLE_MASK; | |
653e3108 AK |
2932 | |
2933 | return ar; | |
2934 | } | |
2935 | ||
2936 | static void vmx_set_segment(struct kvm_vcpu *vcpu, | |
2937 | struct kvm_segment *var, int seg) | |
2938 | { | |
7ffd92c5 | 2939 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
653e3108 AK |
2940 | struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; |
2941 | u32 ar; | |
2942 | ||
2fb92db1 AK |
2943 | vmx_segment_cache_clear(vmx); |
2944 | ||
7ffd92c5 | 2945 | if (vmx->rmode.vm86_active && seg == VCPU_SREG_TR) { |
a8ba6c26 | 2946 | vmcs_write16(sf->selector, var->selector); |
7ffd92c5 AK |
2947 | vmx->rmode.tr.selector = var->selector; |
2948 | vmx->rmode.tr.base = var->base; | |
2949 | vmx->rmode.tr.limit = var->limit; | |
2950 | vmx->rmode.tr.ar = vmx_segment_access_rights(var); | |
653e3108 AK |
2951 | return; |
2952 | } | |
2953 | vmcs_writel(sf->base, var->base); | |
2954 | vmcs_write32(sf->limit, var->limit); | |
2955 | vmcs_write16(sf->selector, var->selector); | |
7ffd92c5 | 2956 | if (vmx->rmode.vm86_active && var->s) { |
653e3108 AK |
2957 | /* |
2958 | * Hack real-mode segments into vm86 compatibility. | |
2959 | */ | |
2960 | if (var->base == 0xffff0000 && var->selector == 0xf000) | |
2961 | vmcs_writel(sf->base, 0xf0000); | |
2962 | ar = 0xf3; | |
2963 | } else | |
2964 | ar = vmx_segment_access_rights(var); | |
3a624e29 NK |
2965 | |
2966 | /* | |
2967 | * Fix the "Accessed" bit in AR field of segment registers for older | |
2968 | * qemu binaries. | |
2969 | * IA32 arch specifies that at the time of processor reset the | |
2970 | * "Accessed" bit in the AR field of segment registers is 1. And qemu | |
2971 | * is setting it to 0 in the usedland code. This causes invalid guest | |
2972 | * state vmexit when "unrestricted guest" mode is turned on. | |
2973 | * Fix for this setup issue in cpu_reset is being pushed in the qemu | |
2974 | * tree. Newer qemu binaries with that qemu fix would not need this | |
2975 | * kvm hack. | |
2976 | */ | |
2977 | if (enable_unrestricted_guest && (seg != VCPU_SREG_LDTR)) | |
2978 | ar |= 0x1; /* Accessed */ | |
2979 | ||
6aa8b732 | 2980 | vmcs_write32(sf->ar_bytes, ar); |
69c73028 | 2981 | __clear_bit(VCPU_EXREG_CPL, (ulong *)&vcpu->arch.regs_avail); |
6aa8b732 AK |
2982 | } |
2983 | ||
6aa8b732 AK |
2984 | static void vmx_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l) |
2985 | { | |
2fb92db1 | 2986 | u32 ar = vmx_read_guest_seg_ar(to_vmx(vcpu), VCPU_SREG_CS); |
6aa8b732 AK |
2987 | |
2988 | *db = (ar >> 14) & 1; | |
2989 | *l = (ar >> 13) & 1; | |
2990 | } | |
2991 | ||
89a27f4d | 2992 | static void vmx_get_idt(struct kvm_vcpu *vcpu, struct desc_ptr *dt) |
6aa8b732 | 2993 | { |
89a27f4d GN |
2994 | dt->size = vmcs_read32(GUEST_IDTR_LIMIT); |
2995 | dt->address = vmcs_readl(GUEST_IDTR_BASE); | |
6aa8b732 AK |
2996 | } |
2997 | ||
89a27f4d | 2998 | static void vmx_set_idt(struct kvm_vcpu *vcpu, struct desc_ptr *dt) |
6aa8b732 | 2999 | { |
89a27f4d GN |
3000 | vmcs_write32(GUEST_IDTR_LIMIT, dt->size); |
3001 | vmcs_writel(GUEST_IDTR_BASE, dt->address); | |
6aa8b732 AK |
3002 | } |
3003 | ||
89a27f4d | 3004 | static void vmx_get_gdt(struct kvm_vcpu *vcpu, struct desc_ptr *dt) |
6aa8b732 | 3005 | { |
89a27f4d GN |
3006 | dt->size = vmcs_read32(GUEST_GDTR_LIMIT); |
3007 | dt->address = vmcs_readl(GUEST_GDTR_BASE); | |
6aa8b732 AK |
3008 | } |
3009 | ||
89a27f4d | 3010 | static void vmx_set_gdt(struct kvm_vcpu *vcpu, struct desc_ptr *dt) |
6aa8b732 | 3011 | { |
89a27f4d GN |
3012 | vmcs_write32(GUEST_GDTR_LIMIT, dt->size); |
3013 | vmcs_writel(GUEST_GDTR_BASE, dt->address); | |
6aa8b732 AK |
3014 | } |
3015 | ||
648dfaa7 MG |
3016 | static bool rmode_segment_valid(struct kvm_vcpu *vcpu, int seg) |
3017 | { | |
3018 | struct kvm_segment var; | |
3019 | u32 ar; | |
3020 | ||
3021 | vmx_get_segment(vcpu, &var, seg); | |
3022 | ar = vmx_segment_access_rights(&var); | |
3023 | ||
3024 | if (var.base != (var.selector << 4)) | |
3025 | return false; | |
3026 | if (var.limit != 0xffff) | |
3027 | return false; | |
3028 | if (ar != 0xf3) | |
3029 | return false; | |
3030 | ||
3031 | return true; | |
3032 | } | |
3033 | ||
3034 | static bool code_segment_valid(struct kvm_vcpu *vcpu) | |
3035 | { | |
3036 | struct kvm_segment cs; | |
3037 | unsigned int cs_rpl; | |
3038 | ||
3039 | vmx_get_segment(vcpu, &cs, VCPU_SREG_CS); | |
3040 | cs_rpl = cs.selector & SELECTOR_RPL_MASK; | |
3041 | ||
1872a3f4 AK |
3042 | if (cs.unusable) |
3043 | return false; | |
648dfaa7 MG |
3044 | if (~cs.type & (AR_TYPE_CODE_MASK|AR_TYPE_ACCESSES_MASK)) |
3045 | return false; | |
3046 | if (!cs.s) | |
3047 | return false; | |
1872a3f4 | 3048 | if (cs.type & AR_TYPE_WRITEABLE_MASK) { |
648dfaa7 MG |
3049 | if (cs.dpl > cs_rpl) |
3050 | return false; | |
1872a3f4 | 3051 | } else { |
648dfaa7 MG |
3052 | if (cs.dpl != cs_rpl) |
3053 | return false; | |
3054 | } | |
3055 | if (!cs.present) | |
3056 | return false; | |
3057 | ||
3058 | /* TODO: Add Reserved field check, this'll require a new member in the kvm_segment_field structure */ | |
3059 | return true; | |
3060 | } | |
3061 | ||
3062 | static bool stack_segment_valid(struct kvm_vcpu *vcpu) | |
3063 | { | |
3064 | struct kvm_segment ss; | |
3065 | unsigned int ss_rpl; | |
3066 | ||
3067 | vmx_get_segment(vcpu, &ss, VCPU_SREG_SS); | |
3068 | ss_rpl = ss.selector & SELECTOR_RPL_MASK; | |
3069 | ||
1872a3f4 AK |
3070 | if (ss.unusable) |
3071 | return true; | |
3072 | if (ss.type != 3 && ss.type != 7) | |
648dfaa7 MG |
3073 | return false; |
3074 | if (!ss.s) | |
3075 | return false; | |
3076 | if (ss.dpl != ss_rpl) /* DPL != RPL */ | |
3077 | return false; | |
3078 | if (!ss.present) | |
3079 | return false; | |
3080 | ||
3081 | return true; | |
3082 | } | |
3083 | ||
3084 | static bool data_segment_valid(struct kvm_vcpu *vcpu, int seg) | |
3085 | { | |
3086 | struct kvm_segment var; | |
3087 | unsigned int rpl; | |
3088 | ||
3089 | vmx_get_segment(vcpu, &var, seg); | |
3090 | rpl = var.selector & SELECTOR_RPL_MASK; | |
3091 | ||
1872a3f4 AK |
3092 | if (var.unusable) |
3093 | return true; | |
648dfaa7 MG |
3094 | if (!var.s) |
3095 | return false; | |
3096 | if (!var.present) | |
3097 | return false; | |
3098 | if (~var.type & (AR_TYPE_CODE_MASK|AR_TYPE_WRITEABLE_MASK)) { | |
3099 | if (var.dpl < rpl) /* DPL < RPL */ | |
3100 | return false; | |
3101 | } | |
3102 | ||
3103 | /* TODO: Add other members to kvm_segment_field to allow checking for other access | |
3104 | * rights flags | |
3105 | */ | |
3106 | return true; | |
3107 | } | |
3108 | ||
3109 | static bool tr_valid(struct kvm_vcpu *vcpu) | |
3110 | { | |
3111 | struct kvm_segment tr; | |
3112 | ||
3113 | vmx_get_segment(vcpu, &tr, VCPU_SREG_TR); | |
3114 | ||
1872a3f4 AK |
3115 | if (tr.unusable) |
3116 | return false; | |
648dfaa7 MG |
3117 | if (tr.selector & SELECTOR_TI_MASK) /* TI = 1 */ |
3118 | return false; | |
1872a3f4 | 3119 | if (tr.type != 3 && tr.type != 11) /* TODO: Check if guest is in IA32e mode */ |
648dfaa7 MG |
3120 | return false; |
3121 | if (!tr.present) | |
3122 | return false; | |
3123 | ||
3124 | return true; | |
3125 | } | |
3126 | ||
3127 | static bool ldtr_valid(struct kvm_vcpu *vcpu) | |
3128 | { | |
3129 | struct kvm_segment ldtr; | |
3130 | ||
3131 | vmx_get_segment(vcpu, &ldtr, VCPU_SREG_LDTR); | |
3132 | ||
1872a3f4 AK |
3133 | if (ldtr.unusable) |
3134 | return true; | |
648dfaa7 MG |
3135 | if (ldtr.selector & SELECTOR_TI_MASK) /* TI = 1 */ |
3136 | return false; | |
3137 | if (ldtr.type != 2) | |
3138 | return false; | |
3139 | if (!ldtr.present) | |
3140 | return false; | |
3141 | ||
3142 | return true; | |
3143 | } | |
3144 | ||
3145 | static bool cs_ss_rpl_check(struct kvm_vcpu *vcpu) | |
3146 | { | |
3147 | struct kvm_segment cs, ss; | |
3148 | ||
3149 | vmx_get_segment(vcpu, &cs, VCPU_SREG_CS); | |
3150 | vmx_get_segment(vcpu, &ss, VCPU_SREG_SS); | |
3151 | ||
3152 | return ((cs.selector & SELECTOR_RPL_MASK) == | |
3153 | (ss.selector & SELECTOR_RPL_MASK)); | |
3154 | } | |
3155 | ||
3156 | /* | |
3157 | * Check if guest state is valid. Returns true if valid, false if | |
3158 | * not. | |
3159 | * We assume that registers are always usable | |
3160 | */ | |
3161 | static bool guest_state_valid(struct kvm_vcpu *vcpu) | |
3162 | { | |
3163 | /* real mode guest state checks */ | |
3eeb3288 | 3164 | if (!is_protmode(vcpu)) { |
648dfaa7 MG |
3165 | if (!rmode_segment_valid(vcpu, VCPU_SREG_CS)) |
3166 | return false; | |
3167 | if (!rmode_segment_valid(vcpu, VCPU_SREG_SS)) | |
3168 | return false; | |
3169 | if (!rmode_segment_valid(vcpu, VCPU_SREG_DS)) | |
3170 | return false; | |
3171 | if (!rmode_segment_valid(vcpu, VCPU_SREG_ES)) | |
3172 | return false; | |
3173 | if (!rmode_segment_valid(vcpu, VCPU_SREG_FS)) | |
3174 | return false; | |
3175 | if (!rmode_segment_valid(vcpu, VCPU_SREG_GS)) | |
3176 | return false; | |
3177 | } else { | |
3178 | /* protected mode guest state checks */ | |
3179 | if (!cs_ss_rpl_check(vcpu)) | |
3180 | return false; | |
3181 | if (!code_segment_valid(vcpu)) | |
3182 | return false; | |
3183 | if (!stack_segment_valid(vcpu)) | |
3184 | return false; | |
3185 | if (!data_segment_valid(vcpu, VCPU_SREG_DS)) | |
3186 | return false; | |
3187 | if (!data_segment_valid(vcpu, VCPU_SREG_ES)) | |
3188 | return false; | |
3189 | if (!data_segment_valid(vcpu, VCPU_SREG_FS)) | |
3190 | return false; | |
3191 | if (!data_segment_valid(vcpu, VCPU_SREG_GS)) | |
3192 | return false; | |
3193 | if (!tr_valid(vcpu)) | |
3194 | return false; | |
3195 | if (!ldtr_valid(vcpu)) | |
3196 | return false; | |
3197 | } | |
3198 | /* TODO: | |
3199 | * - Add checks on RIP | |
3200 | * - Add checks on RFLAGS | |
3201 | */ | |
3202 | ||
3203 | return true; | |
3204 | } | |
3205 | ||
d77c26fc | 3206 | static int init_rmode_tss(struct kvm *kvm) |
6aa8b732 | 3207 | { |
40dcaa9f | 3208 | gfn_t fn; |
195aefde | 3209 | u16 data = 0; |
40dcaa9f | 3210 | int r, idx, ret = 0; |
6aa8b732 | 3211 | |
40dcaa9f XG |
3212 | idx = srcu_read_lock(&kvm->srcu); |
3213 | fn = rmode_tss_base(kvm) >> PAGE_SHIFT; | |
195aefde IE |
3214 | r = kvm_clear_guest_page(kvm, fn, 0, PAGE_SIZE); |
3215 | if (r < 0) | |
10589a46 | 3216 | goto out; |
195aefde | 3217 | data = TSS_BASE_SIZE + TSS_REDIRECTION_SIZE; |
464d17c8 SY |
3218 | r = kvm_write_guest_page(kvm, fn++, &data, |
3219 | TSS_IOPB_BASE_OFFSET, sizeof(u16)); | |
195aefde | 3220 | if (r < 0) |
10589a46 | 3221 | goto out; |
195aefde IE |
3222 | r = kvm_clear_guest_page(kvm, fn++, 0, PAGE_SIZE); |
3223 | if (r < 0) | |
10589a46 | 3224 | goto out; |
195aefde IE |
3225 | r = kvm_clear_guest_page(kvm, fn, 0, PAGE_SIZE); |
3226 | if (r < 0) | |
10589a46 | 3227 | goto out; |
195aefde | 3228 | data = ~0; |
10589a46 MT |
3229 | r = kvm_write_guest_page(kvm, fn, &data, |
3230 | RMODE_TSS_SIZE - 2 * PAGE_SIZE - 1, | |
3231 | sizeof(u8)); | |
195aefde | 3232 | if (r < 0) |
10589a46 MT |
3233 | goto out; |
3234 | ||
3235 | ret = 1; | |
3236 | out: | |
40dcaa9f | 3237 | srcu_read_unlock(&kvm->srcu, idx); |
10589a46 | 3238 | return ret; |
6aa8b732 AK |
3239 | } |
3240 | ||
b7ebfb05 SY |
3241 | static int init_rmode_identity_map(struct kvm *kvm) |
3242 | { | |
40dcaa9f | 3243 | int i, idx, r, ret; |
b7ebfb05 SY |
3244 | pfn_t identity_map_pfn; |
3245 | u32 tmp; | |
3246 | ||
089d034e | 3247 | if (!enable_ept) |
b7ebfb05 SY |
3248 | return 1; |
3249 | if (unlikely(!kvm->arch.ept_identity_pagetable)) { | |
3250 | printk(KERN_ERR "EPT: identity-mapping pagetable " | |
3251 | "haven't been allocated!\n"); | |
3252 | return 0; | |
3253 | } | |
3254 | if (likely(kvm->arch.ept_identity_pagetable_done)) | |
3255 | return 1; | |
3256 | ret = 0; | |
b927a3ce | 3257 | identity_map_pfn = kvm->arch.ept_identity_map_addr >> PAGE_SHIFT; |
40dcaa9f | 3258 | idx = srcu_read_lock(&kvm->srcu); |
b7ebfb05 SY |
3259 | r = kvm_clear_guest_page(kvm, identity_map_pfn, 0, PAGE_SIZE); |
3260 | if (r < 0) | |
3261 | goto out; | |
3262 | /* Set up identity-mapping pagetable for EPT in real mode */ | |
3263 | for (i = 0; i < PT32_ENT_PER_PAGE; i++) { | |
3264 | tmp = (i << 22) + (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | | |
3265 | _PAGE_ACCESSED | _PAGE_DIRTY | _PAGE_PSE); | |
3266 | r = kvm_write_guest_page(kvm, identity_map_pfn, | |
3267 | &tmp, i * sizeof(tmp), sizeof(tmp)); | |
3268 | if (r < 0) | |
3269 | goto out; | |
3270 | } | |
3271 | kvm->arch.ept_identity_pagetable_done = true; | |
3272 | ret = 1; | |
3273 | out: | |
40dcaa9f | 3274 | srcu_read_unlock(&kvm->srcu, idx); |
b7ebfb05 SY |
3275 | return ret; |
3276 | } | |
3277 | ||
6aa8b732 AK |
3278 | static void seg_setup(int seg) |
3279 | { | |
3280 | struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; | |
3a624e29 | 3281 | unsigned int ar; |
6aa8b732 AK |
3282 | |
3283 | vmcs_write16(sf->selector, 0); | |
3284 | vmcs_writel(sf->base, 0); | |
3285 | vmcs_write32(sf->limit, 0xffff); | |
3a624e29 NK |
3286 | if (enable_unrestricted_guest) { |
3287 | ar = 0x93; | |
3288 | if (seg == VCPU_SREG_CS) | |
3289 | ar |= 0x08; /* code segment */ | |
3290 | } else | |
3291 | ar = 0xf3; | |
3292 | ||
3293 | vmcs_write32(sf->ar_bytes, ar); | |
6aa8b732 AK |
3294 | } |
3295 | ||
f78e0e2e SY |
3296 | static int alloc_apic_access_page(struct kvm *kvm) |
3297 | { | |
3298 | struct kvm_userspace_memory_region kvm_userspace_mem; | |
3299 | int r = 0; | |
3300 | ||
79fac95e | 3301 | mutex_lock(&kvm->slots_lock); |
bfc6d222 | 3302 | if (kvm->arch.apic_access_page) |
f78e0e2e SY |
3303 | goto out; |
3304 | kvm_userspace_mem.slot = APIC_ACCESS_PAGE_PRIVATE_MEMSLOT; | |
3305 | kvm_userspace_mem.flags = 0; | |
3306 | kvm_userspace_mem.guest_phys_addr = 0xfee00000ULL; | |
3307 | kvm_userspace_mem.memory_size = PAGE_SIZE; | |
3308 | r = __kvm_set_memory_region(kvm, &kvm_userspace_mem, 0); | |
3309 | if (r) | |
3310 | goto out; | |
72dc67a6 | 3311 | |
bfc6d222 | 3312 | kvm->arch.apic_access_page = gfn_to_page(kvm, 0xfee00); |
f78e0e2e | 3313 | out: |
79fac95e | 3314 | mutex_unlock(&kvm->slots_lock); |
f78e0e2e SY |
3315 | return r; |
3316 | } | |
3317 | ||
b7ebfb05 SY |
3318 | static int alloc_identity_pagetable(struct kvm *kvm) |
3319 | { | |
3320 | struct kvm_userspace_memory_region kvm_userspace_mem; | |
3321 | int r = 0; | |
3322 | ||
79fac95e | 3323 | mutex_lock(&kvm->slots_lock); |
b7ebfb05 SY |
3324 | if (kvm->arch.ept_identity_pagetable) |
3325 | goto out; | |
3326 | kvm_userspace_mem.slot = IDENTITY_PAGETABLE_PRIVATE_MEMSLOT; | |
3327 | kvm_userspace_mem.flags = 0; | |
b927a3ce SY |
3328 | kvm_userspace_mem.guest_phys_addr = |
3329 | kvm->arch.ept_identity_map_addr; | |
b7ebfb05 SY |
3330 | kvm_userspace_mem.memory_size = PAGE_SIZE; |
3331 | r = __kvm_set_memory_region(kvm, &kvm_userspace_mem, 0); | |
3332 | if (r) | |
3333 | goto out; | |
3334 | ||
b7ebfb05 | 3335 | kvm->arch.ept_identity_pagetable = gfn_to_page(kvm, |
b927a3ce | 3336 | kvm->arch.ept_identity_map_addr >> PAGE_SHIFT); |
b7ebfb05 | 3337 | out: |
79fac95e | 3338 | mutex_unlock(&kvm->slots_lock); |
b7ebfb05 SY |
3339 | return r; |
3340 | } | |
3341 | ||
2384d2b3 SY |
3342 | static void allocate_vpid(struct vcpu_vmx *vmx) |
3343 | { | |
3344 | int vpid; | |
3345 | ||
3346 | vmx->vpid = 0; | |
919818ab | 3347 | if (!enable_vpid) |
2384d2b3 SY |
3348 | return; |
3349 | spin_lock(&vmx_vpid_lock); | |
3350 | vpid = find_first_zero_bit(vmx_vpid_bitmap, VMX_NR_VPIDS); | |
3351 | if (vpid < VMX_NR_VPIDS) { | |
3352 | vmx->vpid = vpid; | |
3353 | __set_bit(vpid, vmx_vpid_bitmap); | |
3354 | } | |
3355 | spin_unlock(&vmx_vpid_lock); | |
3356 | } | |
3357 | ||
cdbecfc3 LJ |
3358 | static void free_vpid(struct vcpu_vmx *vmx) |
3359 | { | |
3360 | if (!enable_vpid) | |
3361 | return; | |
3362 | spin_lock(&vmx_vpid_lock); | |
3363 | if (vmx->vpid != 0) | |
3364 | __clear_bit(vmx->vpid, vmx_vpid_bitmap); | |
3365 | spin_unlock(&vmx_vpid_lock); | |
3366 | } | |
3367 | ||
5897297b | 3368 | static void __vmx_disable_intercept_for_msr(unsigned long *msr_bitmap, u32 msr) |
25c5f225 | 3369 | { |
3e7c73e9 | 3370 | int f = sizeof(unsigned long); |
25c5f225 SY |
3371 | |
3372 | if (!cpu_has_vmx_msr_bitmap()) | |
3373 | return; | |
3374 | ||
3375 | /* | |
3376 | * See Intel PRM Vol. 3, 20.6.9 (MSR-Bitmap Address). Early manuals | |
3377 | * have the write-low and read-high bitmap offsets the wrong way round. | |
3378 | * We can control MSRs 0x00000000-0x00001fff and 0xc0000000-0xc0001fff. | |
3379 | */ | |
25c5f225 | 3380 | if (msr <= 0x1fff) { |
3e7c73e9 AK |
3381 | __clear_bit(msr, msr_bitmap + 0x000 / f); /* read-low */ |
3382 | __clear_bit(msr, msr_bitmap + 0x800 / f); /* write-low */ | |
25c5f225 SY |
3383 | } else if ((msr >= 0xc0000000) && (msr <= 0xc0001fff)) { |
3384 | msr &= 0x1fff; | |
3e7c73e9 AK |
3385 | __clear_bit(msr, msr_bitmap + 0x400 / f); /* read-high */ |
3386 | __clear_bit(msr, msr_bitmap + 0xc00 / f); /* write-high */ | |
25c5f225 | 3387 | } |
25c5f225 SY |
3388 | } |
3389 | ||
5897297b AK |
3390 | static void vmx_disable_intercept_for_msr(u32 msr, bool longmode_only) |
3391 | { | |
3392 | if (!longmode_only) | |
3393 | __vmx_disable_intercept_for_msr(vmx_msr_bitmap_legacy, msr); | |
3394 | __vmx_disable_intercept_for_msr(vmx_msr_bitmap_longmode, msr); | |
3395 | } | |
3396 | ||
6aa8b732 AK |
3397 | /* |
3398 | * Sets up the vmcs for emulated real mode. | |
3399 | */ | |
8b9cf98c | 3400 | static int vmx_vcpu_setup(struct vcpu_vmx *vmx) |
6aa8b732 | 3401 | { |
468d472f | 3402 | u32 host_sysenter_cs, msr_low, msr_high; |
6aa8b732 | 3403 | u32 junk; |
f4e1b3c8 | 3404 | u64 host_pat; |
6aa8b732 | 3405 | unsigned long a; |
89a27f4d | 3406 | struct desc_ptr dt; |
6aa8b732 | 3407 | int i; |
cd2276a7 | 3408 | unsigned long kvm_vmx_return; |
6e5d865c | 3409 | u32 exec_control; |
6aa8b732 | 3410 | |
6aa8b732 | 3411 | /* I/O */ |
3e7c73e9 AK |
3412 | vmcs_write64(IO_BITMAP_A, __pa(vmx_io_bitmap_a)); |
3413 | vmcs_write64(IO_BITMAP_B, __pa(vmx_io_bitmap_b)); | |
6aa8b732 | 3414 | |
25c5f225 | 3415 | if (cpu_has_vmx_msr_bitmap()) |
5897297b | 3416 | vmcs_write64(MSR_BITMAP, __pa(vmx_msr_bitmap_legacy)); |
25c5f225 | 3417 | |
6aa8b732 AK |
3418 | vmcs_write64(VMCS_LINK_POINTER, -1ull); /* 22.3.1.5 */ |
3419 | ||
6aa8b732 | 3420 | /* Control */ |
1c3d14fe YS |
3421 | vmcs_write32(PIN_BASED_VM_EXEC_CONTROL, |
3422 | vmcs_config.pin_based_exec_ctrl); | |
6e5d865c YS |
3423 | |
3424 | exec_control = vmcs_config.cpu_based_exec_ctrl; | |
3425 | if (!vm_need_tpr_shadow(vmx->vcpu.kvm)) { | |
3426 | exec_control &= ~CPU_BASED_TPR_SHADOW; | |
3427 | #ifdef CONFIG_X86_64 | |
3428 | exec_control |= CPU_BASED_CR8_STORE_EXITING | | |
3429 | CPU_BASED_CR8_LOAD_EXITING; | |
3430 | #endif | |
3431 | } | |
089d034e | 3432 | if (!enable_ept) |
d56f546d | 3433 | exec_control |= CPU_BASED_CR3_STORE_EXITING | |
83dbc83a MT |
3434 | CPU_BASED_CR3_LOAD_EXITING | |
3435 | CPU_BASED_INVLPG_EXITING; | |
6e5d865c | 3436 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, exec_control); |
6aa8b732 | 3437 | |
83ff3b9d SY |
3438 | if (cpu_has_secondary_exec_ctrls()) { |
3439 | exec_control = vmcs_config.cpu_based_2nd_exec_ctrl; | |
3440 | if (!vm_need_virtualize_apic_accesses(vmx->vcpu.kvm)) | |
3441 | exec_control &= | |
3442 | ~SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES; | |
2384d2b3 SY |
3443 | if (vmx->vpid == 0) |
3444 | exec_control &= ~SECONDARY_EXEC_ENABLE_VPID; | |
046d8710 | 3445 | if (!enable_ept) { |
d56f546d | 3446 | exec_control &= ~SECONDARY_EXEC_ENABLE_EPT; |
046d8710 SY |
3447 | enable_unrestricted_guest = 0; |
3448 | } | |
3a624e29 NK |
3449 | if (!enable_unrestricted_guest) |
3450 | exec_control &= ~SECONDARY_EXEC_UNRESTRICTED_GUEST; | |
4b8d54f9 ZE |
3451 | if (!ple_gap) |
3452 | exec_control &= ~SECONDARY_EXEC_PAUSE_LOOP_EXITING; | |
83ff3b9d SY |
3453 | vmcs_write32(SECONDARY_VM_EXEC_CONTROL, exec_control); |
3454 | } | |
f78e0e2e | 3455 | |
4b8d54f9 ZE |
3456 | if (ple_gap) { |
3457 | vmcs_write32(PLE_GAP, ple_gap); | |
3458 | vmcs_write32(PLE_WINDOW, ple_window); | |
3459 | } | |
3460 | ||
c7addb90 AK |
3461 | vmcs_write32(PAGE_FAULT_ERROR_CODE_MASK, !!bypass_guest_pf); |
3462 | vmcs_write32(PAGE_FAULT_ERROR_CODE_MATCH, !!bypass_guest_pf); | |
6aa8b732 AK |
3463 | vmcs_write32(CR3_TARGET_COUNT, 0); /* 22.2.1 */ |
3464 | ||
1c11e713 | 3465 | vmcs_writel(HOST_CR0, read_cr0() | X86_CR0_TS); /* 22.2.3 */ |
6aa8b732 AK |
3466 | vmcs_writel(HOST_CR4, read_cr4()); /* 22.2.3, 22.2.5 */ |
3467 | vmcs_writel(HOST_CR3, read_cr3()); /* 22.2.3 FIXME: shadow tables */ | |
3468 | ||
3469 | vmcs_write16(HOST_CS_SELECTOR, __KERNEL_CS); /* 22.2.4 */ | |
3470 | vmcs_write16(HOST_DS_SELECTOR, __KERNEL_DS); /* 22.2.4 */ | |
3471 | vmcs_write16(HOST_ES_SELECTOR, __KERNEL_DS); /* 22.2.4 */ | |
9581d442 AK |
3472 | vmcs_write16(HOST_FS_SELECTOR, 0); /* 22.2.4 */ |
3473 | vmcs_write16(HOST_GS_SELECTOR, 0); /* 22.2.4 */ | |
6aa8b732 | 3474 | vmcs_write16(HOST_SS_SELECTOR, __KERNEL_DS); /* 22.2.4 */ |
05b3e0c2 | 3475 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
3476 | rdmsrl(MSR_FS_BASE, a); |
3477 | vmcs_writel(HOST_FS_BASE, a); /* 22.2.4 */ | |
3478 | rdmsrl(MSR_GS_BASE, a); | |
3479 | vmcs_writel(HOST_GS_BASE, a); /* 22.2.4 */ | |
3480 | #else | |
3481 | vmcs_writel(HOST_FS_BASE, 0); /* 22.2.4 */ | |
3482 | vmcs_writel(HOST_GS_BASE, 0); /* 22.2.4 */ | |
3483 | #endif | |
3484 | ||
3485 | vmcs_write16(HOST_TR_SELECTOR, GDT_ENTRY_TSS*8); /* 22.2.4 */ | |
3486 | ||
ec68798c | 3487 | native_store_idt(&dt); |
89a27f4d | 3488 | vmcs_writel(HOST_IDTR_BASE, dt.address); /* 22.2.4 */ |
6aa8b732 | 3489 | |
d77c26fc | 3490 | asm("mov $.Lkvm_vmx_return, %0" : "=r"(kvm_vmx_return)); |
cd2276a7 | 3491 | vmcs_writel(HOST_RIP, kvm_vmx_return); /* 22.2.5 */ |
2cc51560 ED |
3492 | vmcs_write32(VM_EXIT_MSR_STORE_COUNT, 0); |
3493 | vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, 0); | |
61d2ef2c | 3494 | vmcs_write64(VM_EXIT_MSR_LOAD_ADDR, __pa(vmx->msr_autoload.host)); |
2cc51560 | 3495 | vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, 0); |
61d2ef2c | 3496 | vmcs_write64(VM_ENTRY_MSR_LOAD_ADDR, __pa(vmx->msr_autoload.guest)); |
6aa8b732 AK |
3497 | |
3498 | rdmsr(MSR_IA32_SYSENTER_CS, host_sysenter_cs, junk); | |
3499 | vmcs_write32(HOST_IA32_SYSENTER_CS, host_sysenter_cs); | |
3500 | rdmsrl(MSR_IA32_SYSENTER_ESP, a); | |
3501 | vmcs_writel(HOST_IA32_SYSENTER_ESP, a); /* 22.2.3 */ | |
3502 | rdmsrl(MSR_IA32_SYSENTER_EIP, a); | |
3503 | vmcs_writel(HOST_IA32_SYSENTER_EIP, a); /* 22.2.3 */ | |
3504 | ||
468d472f SY |
3505 | if (vmcs_config.vmexit_ctrl & VM_EXIT_LOAD_IA32_PAT) { |
3506 | rdmsr(MSR_IA32_CR_PAT, msr_low, msr_high); | |
3507 | host_pat = msr_low | ((u64) msr_high << 32); | |
3508 | vmcs_write64(HOST_IA32_PAT, host_pat); | |
3509 | } | |
3510 | if (vmcs_config.vmentry_ctrl & VM_ENTRY_LOAD_IA32_PAT) { | |
3511 | rdmsr(MSR_IA32_CR_PAT, msr_low, msr_high); | |
3512 | host_pat = msr_low | ((u64) msr_high << 32); | |
3513 | /* Write the default value follow host pat */ | |
3514 | vmcs_write64(GUEST_IA32_PAT, host_pat); | |
3515 | /* Keep arch.pat sync with GUEST_IA32_PAT */ | |
3516 | vmx->vcpu.arch.pat = host_pat; | |
3517 | } | |
3518 | ||
6aa8b732 AK |
3519 | for (i = 0; i < NR_VMX_MSR; ++i) { |
3520 | u32 index = vmx_msr_index[i]; | |
3521 | u32 data_low, data_high; | |
a2fa3e9f | 3522 | int j = vmx->nmsrs; |
6aa8b732 AK |
3523 | |
3524 | if (rdmsr_safe(index, &data_low, &data_high) < 0) | |
3525 | continue; | |
432bd6cb AK |
3526 | if (wrmsr_safe(index, data_low, data_high) < 0) |
3527 | continue; | |
26bb0981 AK |
3528 | vmx->guest_msrs[j].index = i; |
3529 | vmx->guest_msrs[j].data = 0; | |
d5696725 | 3530 | vmx->guest_msrs[j].mask = -1ull; |
a2fa3e9f | 3531 | ++vmx->nmsrs; |
6aa8b732 | 3532 | } |
6aa8b732 | 3533 | |
1c3d14fe | 3534 | vmcs_write32(VM_EXIT_CONTROLS, vmcs_config.vmexit_ctrl); |
6aa8b732 AK |
3535 | |
3536 | /* 22.2.1, 20.8.1 */ | |
1c3d14fe YS |
3537 | vmcs_write32(VM_ENTRY_CONTROLS, vmcs_config.vmentry_ctrl); |
3538 | ||
e00c8cf2 | 3539 | vmcs_writel(CR0_GUEST_HOST_MASK, ~0UL); |
4c38609a | 3540 | vmx->vcpu.arch.cr4_guest_owned_bits = KVM_CR4_GUEST_OWNED_BITS; |
ce03e4f2 AK |
3541 | if (enable_ept) |
3542 | vmx->vcpu.arch.cr4_guest_owned_bits |= X86_CR4_PGE; | |
4c38609a | 3543 | vmcs_writel(CR4_GUEST_HOST_MASK, ~vmx->vcpu.arch.cr4_guest_owned_bits); |
e00c8cf2 | 3544 | |
99e3e30a | 3545 | kvm_write_tsc(&vmx->vcpu, 0); |
f78e0e2e | 3546 | |
e00c8cf2 AK |
3547 | return 0; |
3548 | } | |
3549 | ||
3550 | static int vmx_vcpu_reset(struct kvm_vcpu *vcpu) | |
3551 | { | |
3552 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
3553 | u64 msr; | |
4b9d3a04 | 3554 | int ret; |
e00c8cf2 | 3555 | |
5fdbf976 | 3556 | vcpu->arch.regs_avail = ~((1 << VCPU_REGS_RIP) | (1 << VCPU_REGS_RSP)); |
e00c8cf2 | 3557 | |
7ffd92c5 | 3558 | vmx->rmode.vm86_active = 0; |
e00c8cf2 | 3559 | |
3b86cd99 JK |
3560 | vmx->soft_vnmi_blocked = 0; |
3561 | ||
ad312c7c | 3562 | vmx->vcpu.arch.regs[VCPU_REGS_RDX] = get_rdx_init_val(); |
2d3ad1f4 | 3563 | kvm_set_cr8(&vmx->vcpu, 0); |
e00c8cf2 | 3564 | msr = 0xfee00000 | MSR_IA32_APICBASE_ENABLE; |
c5af89b6 | 3565 | if (kvm_vcpu_is_bsp(&vmx->vcpu)) |
e00c8cf2 AK |
3566 | msr |= MSR_IA32_APICBASE_BSP; |
3567 | kvm_set_apic_base(&vmx->vcpu, msr); | |
3568 | ||
10ab25cd JK |
3569 | ret = fx_init(&vmx->vcpu); |
3570 | if (ret != 0) | |
3571 | goto out; | |
e00c8cf2 | 3572 | |
2fb92db1 AK |
3573 | vmx_segment_cache_clear(vmx); |
3574 | ||
5706be0d | 3575 | seg_setup(VCPU_SREG_CS); |
e00c8cf2 AK |
3576 | /* |
3577 | * GUEST_CS_BASE should really be 0xffff0000, but VT vm86 mode | |
3578 | * insists on having GUEST_CS_BASE == GUEST_CS_SELECTOR << 4. Sigh. | |
3579 | */ | |
c5af89b6 | 3580 | if (kvm_vcpu_is_bsp(&vmx->vcpu)) { |
e00c8cf2 AK |
3581 | vmcs_write16(GUEST_CS_SELECTOR, 0xf000); |
3582 | vmcs_writel(GUEST_CS_BASE, 0x000f0000); | |
3583 | } else { | |
ad312c7c ZX |
3584 | vmcs_write16(GUEST_CS_SELECTOR, vmx->vcpu.arch.sipi_vector << 8); |
3585 | vmcs_writel(GUEST_CS_BASE, vmx->vcpu.arch.sipi_vector << 12); | |
e00c8cf2 | 3586 | } |
e00c8cf2 AK |
3587 | |
3588 | seg_setup(VCPU_SREG_DS); | |
3589 | seg_setup(VCPU_SREG_ES); | |
3590 | seg_setup(VCPU_SREG_FS); | |
3591 | seg_setup(VCPU_SREG_GS); | |
3592 | seg_setup(VCPU_SREG_SS); | |
3593 | ||
3594 | vmcs_write16(GUEST_TR_SELECTOR, 0); | |
3595 | vmcs_writel(GUEST_TR_BASE, 0); | |
3596 | vmcs_write32(GUEST_TR_LIMIT, 0xffff); | |
3597 | vmcs_write32(GUEST_TR_AR_BYTES, 0x008b); | |
3598 | ||
3599 | vmcs_write16(GUEST_LDTR_SELECTOR, 0); | |
3600 | vmcs_writel(GUEST_LDTR_BASE, 0); | |
3601 | vmcs_write32(GUEST_LDTR_LIMIT, 0xffff); | |
3602 | vmcs_write32(GUEST_LDTR_AR_BYTES, 0x00082); | |
3603 | ||
3604 | vmcs_write32(GUEST_SYSENTER_CS, 0); | |
3605 | vmcs_writel(GUEST_SYSENTER_ESP, 0); | |
3606 | vmcs_writel(GUEST_SYSENTER_EIP, 0); | |
3607 | ||
3608 | vmcs_writel(GUEST_RFLAGS, 0x02); | |
c5af89b6 | 3609 | if (kvm_vcpu_is_bsp(&vmx->vcpu)) |
5fdbf976 | 3610 | kvm_rip_write(vcpu, 0xfff0); |
e00c8cf2 | 3611 | else |
5fdbf976 MT |
3612 | kvm_rip_write(vcpu, 0); |
3613 | kvm_register_write(vcpu, VCPU_REGS_RSP, 0); | |
e00c8cf2 | 3614 | |
e00c8cf2 AK |
3615 | vmcs_writel(GUEST_DR7, 0x400); |
3616 | ||
3617 | vmcs_writel(GUEST_GDTR_BASE, 0); | |
3618 | vmcs_write32(GUEST_GDTR_LIMIT, 0xffff); | |
3619 | ||
3620 | vmcs_writel(GUEST_IDTR_BASE, 0); | |
3621 | vmcs_write32(GUEST_IDTR_LIMIT, 0xffff); | |
3622 | ||
443381a8 | 3623 | vmcs_write32(GUEST_ACTIVITY_STATE, GUEST_ACTIVITY_ACTIVE); |
e00c8cf2 AK |
3624 | vmcs_write32(GUEST_INTERRUPTIBILITY_INFO, 0); |
3625 | vmcs_write32(GUEST_PENDING_DBG_EXCEPTIONS, 0); | |
3626 | ||
e00c8cf2 AK |
3627 | /* Special registers */ |
3628 | vmcs_write64(GUEST_IA32_DEBUGCTL, 0); | |
3629 | ||
3630 | setup_msrs(vmx); | |
3631 | ||
6aa8b732 AK |
3632 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, 0); /* 22.2.1 */ |
3633 | ||
f78e0e2e SY |
3634 | if (cpu_has_vmx_tpr_shadow()) { |
3635 | vmcs_write64(VIRTUAL_APIC_PAGE_ADDR, 0); | |
3636 | if (vm_need_tpr_shadow(vmx->vcpu.kvm)) | |
3637 | vmcs_write64(VIRTUAL_APIC_PAGE_ADDR, | |
afc20184 | 3638 | __pa(vmx->vcpu.arch.apic->regs)); |
f78e0e2e SY |
3639 | vmcs_write32(TPR_THRESHOLD, 0); |
3640 | } | |
3641 | ||
3642 | if (vm_need_virtualize_apic_accesses(vmx->vcpu.kvm)) | |
3643 | vmcs_write64(APIC_ACCESS_ADDR, | |
bfc6d222 | 3644 | page_to_phys(vmx->vcpu.kvm->arch.apic_access_page)); |
6aa8b732 | 3645 | |
2384d2b3 SY |
3646 | if (vmx->vpid != 0) |
3647 | vmcs_write16(VIRTUAL_PROCESSOR_ID, vmx->vpid); | |
3648 | ||
fa40052c | 3649 | vmx->vcpu.arch.cr0 = X86_CR0_NW | X86_CR0_CD | X86_CR0_ET; |
4d4ec087 | 3650 | vmx_set_cr0(&vmx->vcpu, kvm_read_cr0(vcpu)); /* enter rmode */ |
8b9cf98c | 3651 | vmx_set_cr4(&vmx->vcpu, 0); |
8b9cf98c | 3652 | vmx_set_efer(&vmx->vcpu, 0); |
8b9cf98c RR |
3653 | vmx_fpu_activate(&vmx->vcpu); |
3654 | update_exception_bitmap(&vmx->vcpu); | |
6aa8b732 | 3655 | |
b9d762fa | 3656 | vpid_sync_context(vmx); |
2384d2b3 | 3657 | |
3200f405 | 3658 | ret = 0; |
6aa8b732 | 3659 | |
a89a8fb9 MG |
3660 | /* HACK: Don't enable emulation on guest boot/reset */ |
3661 | vmx->emulation_required = 0; | |
3662 | ||
6aa8b732 AK |
3663 | out: |
3664 | return ret; | |
3665 | } | |
3666 | ||
3b86cd99 JK |
3667 | static void enable_irq_window(struct kvm_vcpu *vcpu) |
3668 | { | |
3669 | u32 cpu_based_vm_exec_control; | |
3670 | ||
3671 | cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL); | |
3672 | cpu_based_vm_exec_control |= CPU_BASED_VIRTUAL_INTR_PENDING; | |
3673 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control); | |
3674 | } | |
3675 | ||
3676 | static void enable_nmi_window(struct kvm_vcpu *vcpu) | |
3677 | { | |
3678 | u32 cpu_based_vm_exec_control; | |
3679 | ||
3680 | if (!cpu_has_virtual_nmis()) { | |
3681 | enable_irq_window(vcpu); | |
3682 | return; | |
3683 | } | |
3684 | ||
30bd0c4c AK |
3685 | if (vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & GUEST_INTR_STATE_STI) { |
3686 | enable_irq_window(vcpu); | |
3687 | return; | |
3688 | } | |
3b86cd99 JK |
3689 | cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL); |
3690 | cpu_based_vm_exec_control |= CPU_BASED_VIRTUAL_NMI_PENDING; | |
3691 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control); | |
3692 | } | |
3693 | ||
66fd3f7f | 3694 | static void vmx_inject_irq(struct kvm_vcpu *vcpu) |
85f455f7 | 3695 | { |
9c8cba37 | 3696 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
66fd3f7f GN |
3697 | uint32_t intr; |
3698 | int irq = vcpu->arch.interrupt.nr; | |
9c8cba37 | 3699 | |
229456fc | 3700 | trace_kvm_inj_virq(irq); |
2714d1d3 | 3701 | |
fa89a817 | 3702 | ++vcpu->stat.irq_injections; |
7ffd92c5 | 3703 | if (vmx->rmode.vm86_active) { |
71f9833b SH |
3704 | int inc_eip = 0; |
3705 | if (vcpu->arch.interrupt.soft) | |
3706 | inc_eip = vcpu->arch.event_exit_inst_len; | |
3707 | if (kvm_inject_realmode_interrupt(vcpu, irq, inc_eip) != EMULATE_DONE) | |
a92601bb | 3708 | kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu); |
85f455f7 ED |
3709 | return; |
3710 | } | |
66fd3f7f GN |
3711 | intr = irq | INTR_INFO_VALID_MASK; |
3712 | if (vcpu->arch.interrupt.soft) { | |
3713 | intr |= INTR_TYPE_SOFT_INTR; | |
3714 | vmcs_write32(VM_ENTRY_INSTRUCTION_LEN, | |
3715 | vmx->vcpu.arch.event_exit_inst_len); | |
3716 | } else | |
3717 | intr |= INTR_TYPE_EXT_INTR; | |
3718 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, intr); | |
443381a8 | 3719 | vmx_clear_hlt(vcpu); |
85f455f7 ED |
3720 | } |
3721 | ||
f08864b4 SY |
3722 | static void vmx_inject_nmi(struct kvm_vcpu *vcpu) |
3723 | { | |
66a5a347 JK |
3724 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
3725 | ||
3b86cd99 JK |
3726 | if (!cpu_has_virtual_nmis()) { |
3727 | /* | |
3728 | * Tracking the NMI-blocked state in software is built upon | |
3729 | * finding the next open IRQ window. This, in turn, depends on | |
3730 | * well-behaving guests: They have to keep IRQs disabled at | |
3731 | * least as long as the NMI handler runs. Otherwise we may | |
3732 | * cause NMI nesting, maybe breaking the guest. But as this is | |
3733 | * highly unlikely, we can live with the residual risk. | |
3734 | */ | |
3735 | vmx->soft_vnmi_blocked = 1; | |
3736 | vmx->vnmi_blocked_time = 0; | |
3737 | } | |
3738 | ||
487b391d | 3739 | ++vcpu->stat.nmi_injections; |
9d58b931 | 3740 | vmx->nmi_known_unmasked = false; |
7ffd92c5 | 3741 | if (vmx->rmode.vm86_active) { |
71f9833b | 3742 | if (kvm_inject_realmode_interrupt(vcpu, NMI_VECTOR, 0) != EMULATE_DONE) |
a92601bb | 3743 | kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu); |
66a5a347 JK |
3744 | return; |
3745 | } | |
f08864b4 SY |
3746 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, |
3747 | INTR_TYPE_NMI_INTR | INTR_INFO_VALID_MASK | NMI_VECTOR); | |
443381a8 | 3748 | vmx_clear_hlt(vcpu); |
f08864b4 SY |
3749 | } |
3750 | ||
c4282df9 | 3751 | static int vmx_nmi_allowed(struct kvm_vcpu *vcpu) |
33f089ca | 3752 | { |
3b86cd99 | 3753 | if (!cpu_has_virtual_nmis() && to_vmx(vcpu)->soft_vnmi_blocked) |
c4282df9 | 3754 | return 0; |
33f089ca | 3755 | |
c4282df9 | 3756 | return !(vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & |
30bd0c4c AK |
3757 | (GUEST_INTR_STATE_MOV_SS | GUEST_INTR_STATE_STI |
3758 | | GUEST_INTR_STATE_NMI)); | |
33f089ca JK |
3759 | } |
3760 | ||
3cfc3092 JK |
3761 | static bool vmx_get_nmi_mask(struct kvm_vcpu *vcpu) |
3762 | { | |
3763 | if (!cpu_has_virtual_nmis()) | |
3764 | return to_vmx(vcpu)->soft_vnmi_blocked; | |
9d58b931 AK |
3765 | if (to_vmx(vcpu)->nmi_known_unmasked) |
3766 | return false; | |
c332c83a | 3767 | return vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & GUEST_INTR_STATE_NMI; |
3cfc3092 JK |
3768 | } |
3769 | ||
3770 | static void vmx_set_nmi_mask(struct kvm_vcpu *vcpu, bool masked) | |
3771 | { | |
3772 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
3773 | ||
3774 | if (!cpu_has_virtual_nmis()) { | |
3775 | if (vmx->soft_vnmi_blocked != masked) { | |
3776 | vmx->soft_vnmi_blocked = masked; | |
3777 | vmx->vnmi_blocked_time = 0; | |
3778 | } | |
3779 | } else { | |
9d58b931 | 3780 | vmx->nmi_known_unmasked = !masked; |
3cfc3092 JK |
3781 | if (masked) |
3782 | vmcs_set_bits(GUEST_INTERRUPTIBILITY_INFO, | |
3783 | GUEST_INTR_STATE_NMI); | |
3784 | else | |
3785 | vmcs_clear_bits(GUEST_INTERRUPTIBILITY_INFO, | |
3786 | GUEST_INTR_STATE_NMI); | |
3787 | } | |
3788 | } | |
3789 | ||
78646121 GN |
3790 | static int vmx_interrupt_allowed(struct kvm_vcpu *vcpu) |
3791 | { | |
c4282df9 GN |
3792 | return (vmcs_readl(GUEST_RFLAGS) & X86_EFLAGS_IF) && |
3793 | !(vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & | |
3794 | (GUEST_INTR_STATE_STI | GUEST_INTR_STATE_MOV_SS)); | |
78646121 GN |
3795 | } |
3796 | ||
cbc94022 IE |
3797 | static int vmx_set_tss_addr(struct kvm *kvm, unsigned int addr) |
3798 | { | |
3799 | int ret; | |
3800 | struct kvm_userspace_memory_region tss_mem = { | |
6fe63979 | 3801 | .slot = TSS_PRIVATE_MEMSLOT, |
cbc94022 IE |
3802 | .guest_phys_addr = addr, |
3803 | .memory_size = PAGE_SIZE * 3, | |
3804 | .flags = 0, | |
3805 | }; | |
3806 | ||
3807 | ret = kvm_set_memory_region(kvm, &tss_mem, 0); | |
3808 | if (ret) | |
3809 | return ret; | |
bfc6d222 | 3810 | kvm->arch.tss_addr = addr; |
93ea5388 GN |
3811 | if (!init_rmode_tss(kvm)) |
3812 | return -ENOMEM; | |
3813 | ||
cbc94022 IE |
3814 | return 0; |
3815 | } | |
3816 | ||
6aa8b732 AK |
3817 | static int handle_rmode_exception(struct kvm_vcpu *vcpu, |
3818 | int vec, u32 err_code) | |
3819 | { | |
b3f37707 NK |
3820 | /* |
3821 | * Instruction with address size override prefix opcode 0x67 | |
3822 | * Cause the #SS fault with 0 error code in VM86 mode. | |
3823 | */ | |
3824 | if (((vec == GP_VECTOR) || (vec == SS_VECTOR)) && err_code == 0) | |
51d8b661 | 3825 | if (emulate_instruction(vcpu, 0) == EMULATE_DONE) |
6aa8b732 | 3826 | return 1; |
77ab6db0 JK |
3827 | /* |
3828 | * Forward all other exceptions that are valid in real mode. | |
3829 | * FIXME: Breaks guest debugging in real mode, needs to be fixed with | |
3830 | * the required debugging infrastructure rework. | |
3831 | */ | |
3832 | switch (vec) { | |
77ab6db0 | 3833 | case DB_VECTOR: |
d0bfb940 JK |
3834 | if (vcpu->guest_debug & |
3835 | (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP)) | |
3836 | return 0; | |
3837 | kvm_queue_exception(vcpu, vec); | |
3838 | return 1; | |
77ab6db0 | 3839 | case BP_VECTOR: |
c573cd22 JK |
3840 | /* |
3841 | * Update instruction length as we may reinject the exception | |
3842 | * from user space while in guest debugging mode. | |
3843 | */ | |
3844 | to_vmx(vcpu)->vcpu.arch.event_exit_inst_len = | |
3845 | vmcs_read32(VM_EXIT_INSTRUCTION_LEN); | |
d0bfb940 JK |
3846 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP) |
3847 | return 0; | |
3848 | /* fall through */ | |
3849 | case DE_VECTOR: | |
77ab6db0 JK |
3850 | case OF_VECTOR: |
3851 | case BR_VECTOR: | |
3852 | case UD_VECTOR: | |
3853 | case DF_VECTOR: | |
3854 | case SS_VECTOR: | |
3855 | case GP_VECTOR: | |
3856 | case MF_VECTOR: | |
3857 | kvm_queue_exception(vcpu, vec); | |
3858 | return 1; | |
3859 | } | |
6aa8b732 AK |
3860 | return 0; |
3861 | } | |
3862 | ||
a0861c02 AK |
3863 | /* |
3864 | * Trigger machine check on the host. We assume all the MSRs are already set up | |
3865 | * by the CPU and that we still run on the same CPU as the MCE occurred on. | |
3866 | * We pass a fake environment to the machine check handler because we want | |
3867 | * the guest to be always treated like user space, no matter what context | |
3868 | * it used internally. | |
3869 | */ | |
3870 | static void kvm_machine_check(void) | |
3871 | { | |
3872 | #if defined(CONFIG_X86_MCE) && defined(CONFIG_X86_64) | |
3873 | struct pt_regs regs = { | |
3874 | .cs = 3, /* Fake ring 3 no matter what the guest ran on */ | |
3875 | .flags = X86_EFLAGS_IF, | |
3876 | }; | |
3877 | ||
3878 | do_machine_check(®s, 0); | |
3879 | #endif | |
3880 | } | |
3881 | ||
851ba692 | 3882 | static int handle_machine_check(struct kvm_vcpu *vcpu) |
a0861c02 AK |
3883 | { |
3884 | /* already handled by vcpu_run */ | |
3885 | return 1; | |
3886 | } | |
3887 | ||
851ba692 | 3888 | static int handle_exception(struct kvm_vcpu *vcpu) |
6aa8b732 | 3889 | { |
1155f76a | 3890 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
851ba692 | 3891 | struct kvm_run *kvm_run = vcpu->run; |
d0bfb940 | 3892 | u32 intr_info, ex_no, error_code; |
42dbaa5a | 3893 | unsigned long cr2, rip, dr6; |
6aa8b732 AK |
3894 | u32 vect_info; |
3895 | enum emulation_result er; | |
3896 | ||
1155f76a | 3897 | vect_info = vmx->idt_vectoring_info; |
88786475 | 3898 | intr_info = vmx->exit_intr_info; |
6aa8b732 | 3899 | |
a0861c02 | 3900 | if (is_machine_check(intr_info)) |
851ba692 | 3901 | return handle_machine_check(vcpu); |
a0861c02 | 3902 | |
6aa8b732 | 3903 | if ((vect_info & VECTORING_INFO_VALID_MASK) && |
65ac7264 AK |
3904 | !is_page_fault(intr_info)) { |
3905 | vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR; | |
3906 | vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_SIMUL_EX; | |
3907 | vcpu->run->internal.ndata = 2; | |
3908 | vcpu->run->internal.data[0] = vect_info; | |
3909 | vcpu->run->internal.data[1] = intr_info; | |
3910 | return 0; | |
3911 | } | |
6aa8b732 | 3912 | |
e4a41889 | 3913 | if ((intr_info & INTR_INFO_INTR_TYPE_MASK) == INTR_TYPE_NMI_INTR) |
1b6269db | 3914 | return 1; /* already handled by vmx_vcpu_run() */ |
2ab455cc AL |
3915 | |
3916 | if (is_no_device(intr_info)) { | |
5fd86fcf | 3917 | vmx_fpu_activate(vcpu); |
2ab455cc AL |
3918 | return 1; |
3919 | } | |
3920 | ||
7aa81cc0 | 3921 | if (is_invalid_opcode(intr_info)) { |
51d8b661 | 3922 | er = emulate_instruction(vcpu, EMULTYPE_TRAP_UD); |
7aa81cc0 | 3923 | if (er != EMULATE_DONE) |
7ee5d940 | 3924 | kvm_queue_exception(vcpu, UD_VECTOR); |
7aa81cc0 AL |
3925 | return 1; |
3926 | } | |
3927 | ||
6aa8b732 | 3928 | error_code = 0; |
2e11384c | 3929 | if (intr_info & INTR_INFO_DELIVER_CODE_MASK) |
6aa8b732 AK |
3930 | error_code = vmcs_read32(VM_EXIT_INTR_ERROR_CODE); |
3931 | if (is_page_fault(intr_info)) { | |
1439442c | 3932 | /* EPT won't cause page fault directly */ |
089d034e | 3933 | if (enable_ept) |
1439442c | 3934 | BUG(); |
6aa8b732 | 3935 | cr2 = vmcs_readl(EXIT_QUALIFICATION); |
229456fc MT |
3936 | trace_kvm_page_fault(cr2, error_code); |
3937 | ||
3298b75c | 3938 | if (kvm_event_needs_reinjection(vcpu)) |
577bdc49 | 3939 | kvm_mmu_unprotect_page_virt(vcpu, cr2); |
dc25e89e | 3940 | return kvm_mmu_page_fault(vcpu, cr2, error_code, NULL, 0); |
6aa8b732 AK |
3941 | } |
3942 | ||
7ffd92c5 | 3943 | if (vmx->rmode.vm86_active && |
6aa8b732 | 3944 | handle_rmode_exception(vcpu, intr_info & INTR_INFO_VECTOR_MASK, |
72d6e5a0 | 3945 | error_code)) { |
ad312c7c ZX |
3946 | if (vcpu->arch.halt_request) { |
3947 | vcpu->arch.halt_request = 0; | |
72d6e5a0 AK |
3948 | return kvm_emulate_halt(vcpu); |
3949 | } | |
6aa8b732 | 3950 | return 1; |
72d6e5a0 | 3951 | } |
6aa8b732 | 3952 | |
d0bfb940 | 3953 | ex_no = intr_info & INTR_INFO_VECTOR_MASK; |
42dbaa5a JK |
3954 | switch (ex_no) { |
3955 | case DB_VECTOR: | |
3956 | dr6 = vmcs_readl(EXIT_QUALIFICATION); | |
3957 | if (!(vcpu->guest_debug & | |
3958 | (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP))) { | |
3959 | vcpu->arch.dr6 = dr6 | DR6_FIXED_1; | |
3960 | kvm_queue_exception(vcpu, DB_VECTOR); | |
3961 | return 1; | |
3962 | } | |
3963 | kvm_run->debug.arch.dr6 = dr6 | DR6_FIXED_1; | |
3964 | kvm_run->debug.arch.dr7 = vmcs_readl(GUEST_DR7); | |
3965 | /* fall through */ | |
3966 | case BP_VECTOR: | |
c573cd22 JK |
3967 | /* |
3968 | * Update instruction length as we may reinject #BP from | |
3969 | * user space while in guest debugging mode. Reading it for | |
3970 | * #DB as well causes no harm, it is not used in that case. | |
3971 | */ | |
3972 | vmx->vcpu.arch.event_exit_inst_len = | |
3973 | vmcs_read32(VM_EXIT_INSTRUCTION_LEN); | |
6aa8b732 | 3974 | kvm_run->exit_reason = KVM_EXIT_DEBUG; |
0a434bb2 | 3975 | rip = kvm_rip_read(vcpu); |
d0bfb940 JK |
3976 | kvm_run->debug.arch.pc = vmcs_readl(GUEST_CS_BASE) + rip; |
3977 | kvm_run->debug.arch.exception = ex_no; | |
42dbaa5a JK |
3978 | break; |
3979 | default: | |
d0bfb940 JK |
3980 | kvm_run->exit_reason = KVM_EXIT_EXCEPTION; |
3981 | kvm_run->ex.exception = ex_no; | |
3982 | kvm_run->ex.error_code = error_code; | |
42dbaa5a | 3983 | break; |
6aa8b732 | 3984 | } |
6aa8b732 AK |
3985 | return 0; |
3986 | } | |
3987 | ||
851ba692 | 3988 | static int handle_external_interrupt(struct kvm_vcpu *vcpu) |
6aa8b732 | 3989 | { |
1165f5fe | 3990 | ++vcpu->stat.irq_exits; |
6aa8b732 AK |
3991 | return 1; |
3992 | } | |
3993 | ||
851ba692 | 3994 | static int handle_triple_fault(struct kvm_vcpu *vcpu) |
988ad74f | 3995 | { |
851ba692 | 3996 | vcpu->run->exit_reason = KVM_EXIT_SHUTDOWN; |
988ad74f AK |
3997 | return 0; |
3998 | } | |
6aa8b732 | 3999 | |
851ba692 | 4000 | static int handle_io(struct kvm_vcpu *vcpu) |
6aa8b732 | 4001 | { |
bfdaab09 | 4002 | unsigned long exit_qualification; |
34c33d16 | 4003 | int size, in, string; |
039576c0 | 4004 | unsigned port; |
6aa8b732 | 4005 | |
bfdaab09 | 4006 | exit_qualification = vmcs_readl(EXIT_QUALIFICATION); |
039576c0 | 4007 | string = (exit_qualification & 16) != 0; |
cf8f70bf | 4008 | in = (exit_qualification & 8) != 0; |
e70669ab | 4009 | |
cf8f70bf | 4010 | ++vcpu->stat.io_exits; |
e70669ab | 4011 | |
cf8f70bf | 4012 | if (string || in) |
51d8b661 | 4013 | return emulate_instruction(vcpu, 0) == EMULATE_DONE; |
e70669ab | 4014 | |
cf8f70bf GN |
4015 | port = exit_qualification >> 16; |
4016 | size = (exit_qualification & 7) + 1; | |
e93f36bc | 4017 | skip_emulated_instruction(vcpu); |
cf8f70bf GN |
4018 | |
4019 | return kvm_fast_pio_out(vcpu, size, port); | |
6aa8b732 AK |
4020 | } |
4021 | ||
102d8325 IM |
4022 | static void |
4023 | vmx_patch_hypercall(struct kvm_vcpu *vcpu, unsigned char *hypercall) | |
4024 | { | |
4025 | /* | |
4026 | * Patch in the VMCALL instruction: | |
4027 | */ | |
4028 | hypercall[0] = 0x0f; | |
4029 | hypercall[1] = 0x01; | |
4030 | hypercall[2] = 0xc1; | |
102d8325 IM |
4031 | } |
4032 | ||
851ba692 | 4033 | static int handle_cr(struct kvm_vcpu *vcpu) |
6aa8b732 | 4034 | { |
229456fc | 4035 | unsigned long exit_qualification, val; |
6aa8b732 AK |
4036 | int cr; |
4037 | int reg; | |
49a9b07e | 4038 | int err; |
6aa8b732 | 4039 | |
bfdaab09 | 4040 | exit_qualification = vmcs_readl(EXIT_QUALIFICATION); |
6aa8b732 AK |
4041 | cr = exit_qualification & 15; |
4042 | reg = (exit_qualification >> 8) & 15; | |
4043 | switch ((exit_qualification >> 4) & 3) { | |
4044 | case 0: /* mov to cr */ | |
229456fc MT |
4045 | val = kvm_register_read(vcpu, reg); |
4046 | trace_kvm_cr_write(cr, val); | |
6aa8b732 AK |
4047 | switch (cr) { |
4048 | case 0: | |
49a9b07e | 4049 | err = kvm_set_cr0(vcpu, val); |
db8fcefa | 4050 | kvm_complete_insn_gp(vcpu, err); |
6aa8b732 AK |
4051 | return 1; |
4052 | case 3: | |
2390218b | 4053 | err = kvm_set_cr3(vcpu, val); |
db8fcefa | 4054 | kvm_complete_insn_gp(vcpu, err); |
6aa8b732 AK |
4055 | return 1; |
4056 | case 4: | |
a83b29c6 | 4057 | err = kvm_set_cr4(vcpu, val); |
db8fcefa | 4058 | kvm_complete_insn_gp(vcpu, err); |
6aa8b732 | 4059 | return 1; |
0a5fff19 GN |
4060 | case 8: { |
4061 | u8 cr8_prev = kvm_get_cr8(vcpu); | |
4062 | u8 cr8 = kvm_register_read(vcpu, reg); | |
eea1cff9 | 4063 | err = kvm_set_cr8(vcpu, cr8); |
db8fcefa | 4064 | kvm_complete_insn_gp(vcpu, err); |
0a5fff19 GN |
4065 | if (irqchip_in_kernel(vcpu->kvm)) |
4066 | return 1; | |
4067 | if (cr8_prev <= cr8) | |
4068 | return 1; | |
851ba692 | 4069 | vcpu->run->exit_reason = KVM_EXIT_SET_TPR; |
0a5fff19 GN |
4070 | return 0; |
4071 | } | |
6aa8b732 AK |
4072 | }; |
4073 | break; | |
25c4c276 | 4074 | case 2: /* clts */ |
edcafe3c | 4075 | vmx_set_cr0(vcpu, kvm_read_cr0_bits(vcpu, ~X86_CR0_TS)); |
4d4ec087 | 4076 | trace_kvm_cr_write(0, kvm_read_cr0(vcpu)); |
25c4c276 | 4077 | skip_emulated_instruction(vcpu); |
6b52d186 | 4078 | vmx_fpu_activate(vcpu); |
25c4c276 | 4079 | return 1; |
6aa8b732 AK |
4080 | case 1: /*mov from cr*/ |
4081 | switch (cr) { | |
4082 | case 3: | |
9f8fe504 AK |
4083 | val = kvm_read_cr3(vcpu); |
4084 | kvm_register_write(vcpu, reg, val); | |
4085 | trace_kvm_cr_read(cr, val); | |
6aa8b732 AK |
4086 | skip_emulated_instruction(vcpu); |
4087 | return 1; | |
4088 | case 8: | |
229456fc MT |
4089 | val = kvm_get_cr8(vcpu); |
4090 | kvm_register_write(vcpu, reg, val); | |
4091 | trace_kvm_cr_read(cr, val); | |
6aa8b732 AK |
4092 | skip_emulated_instruction(vcpu); |
4093 | return 1; | |
4094 | } | |
4095 | break; | |
4096 | case 3: /* lmsw */ | |
a1f83a74 | 4097 | val = (exit_qualification >> LMSW_SOURCE_DATA_SHIFT) & 0x0f; |
4d4ec087 | 4098 | trace_kvm_cr_write(0, (kvm_read_cr0(vcpu) & ~0xful) | val); |
a1f83a74 | 4099 | kvm_lmsw(vcpu, val); |
6aa8b732 AK |
4100 | |
4101 | skip_emulated_instruction(vcpu); | |
4102 | return 1; | |
4103 | default: | |
4104 | break; | |
4105 | } | |
851ba692 | 4106 | vcpu->run->exit_reason = 0; |
f0242478 | 4107 | pr_unimpl(vcpu, "unhandled control register: op %d cr %d\n", |
6aa8b732 AK |
4108 | (int)(exit_qualification >> 4) & 3, cr); |
4109 | return 0; | |
4110 | } | |
4111 | ||
851ba692 | 4112 | static int handle_dr(struct kvm_vcpu *vcpu) |
6aa8b732 | 4113 | { |
bfdaab09 | 4114 | unsigned long exit_qualification; |
6aa8b732 AK |
4115 | int dr, reg; |
4116 | ||
f2483415 | 4117 | /* Do not handle if the CPL > 0, will trigger GP on re-entry */ |
0a79b009 AK |
4118 | if (!kvm_require_cpl(vcpu, 0)) |
4119 | return 1; | |
42dbaa5a JK |
4120 | dr = vmcs_readl(GUEST_DR7); |
4121 | if (dr & DR7_GD) { | |
4122 | /* | |
4123 | * As the vm-exit takes precedence over the debug trap, we | |
4124 | * need to emulate the latter, either for the host or the | |
4125 | * guest debugging itself. | |
4126 | */ | |
4127 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) { | |
851ba692 AK |
4128 | vcpu->run->debug.arch.dr6 = vcpu->arch.dr6; |
4129 | vcpu->run->debug.arch.dr7 = dr; | |
4130 | vcpu->run->debug.arch.pc = | |
42dbaa5a JK |
4131 | vmcs_readl(GUEST_CS_BASE) + |
4132 | vmcs_readl(GUEST_RIP); | |
851ba692 AK |
4133 | vcpu->run->debug.arch.exception = DB_VECTOR; |
4134 | vcpu->run->exit_reason = KVM_EXIT_DEBUG; | |
42dbaa5a JK |
4135 | return 0; |
4136 | } else { | |
4137 | vcpu->arch.dr7 &= ~DR7_GD; | |
4138 | vcpu->arch.dr6 |= DR6_BD; | |
4139 | vmcs_writel(GUEST_DR7, vcpu->arch.dr7); | |
4140 | kvm_queue_exception(vcpu, DB_VECTOR); | |
4141 | return 1; | |
4142 | } | |
4143 | } | |
4144 | ||
bfdaab09 | 4145 | exit_qualification = vmcs_readl(EXIT_QUALIFICATION); |
42dbaa5a JK |
4146 | dr = exit_qualification & DEBUG_REG_ACCESS_NUM; |
4147 | reg = DEBUG_REG_ACCESS_REG(exit_qualification); | |
4148 | if (exit_qualification & TYPE_MOV_FROM_DR) { | |
020df079 GN |
4149 | unsigned long val; |
4150 | if (!kvm_get_dr(vcpu, dr, &val)) | |
4151 | kvm_register_write(vcpu, reg, val); | |
4152 | } else | |
4153 | kvm_set_dr(vcpu, dr, vcpu->arch.regs[reg]); | |
6aa8b732 AK |
4154 | skip_emulated_instruction(vcpu); |
4155 | return 1; | |
4156 | } | |
4157 | ||
020df079 GN |
4158 | static void vmx_set_dr7(struct kvm_vcpu *vcpu, unsigned long val) |
4159 | { | |
4160 | vmcs_writel(GUEST_DR7, val); | |
4161 | } | |
4162 | ||
851ba692 | 4163 | static int handle_cpuid(struct kvm_vcpu *vcpu) |
6aa8b732 | 4164 | { |
06465c5a AK |
4165 | kvm_emulate_cpuid(vcpu); |
4166 | return 1; | |
6aa8b732 AK |
4167 | } |
4168 | ||
851ba692 | 4169 | static int handle_rdmsr(struct kvm_vcpu *vcpu) |
6aa8b732 | 4170 | { |
ad312c7c | 4171 | u32 ecx = vcpu->arch.regs[VCPU_REGS_RCX]; |
6aa8b732 AK |
4172 | u64 data; |
4173 | ||
4174 | if (vmx_get_msr(vcpu, ecx, &data)) { | |
59200273 | 4175 | trace_kvm_msr_read_ex(ecx); |
c1a5d4f9 | 4176 | kvm_inject_gp(vcpu, 0); |
6aa8b732 AK |
4177 | return 1; |
4178 | } | |
4179 | ||
229456fc | 4180 | trace_kvm_msr_read(ecx, data); |
2714d1d3 | 4181 | |
6aa8b732 | 4182 | /* FIXME: handling of bits 32:63 of rax, rdx */ |
ad312c7c ZX |
4183 | vcpu->arch.regs[VCPU_REGS_RAX] = data & -1u; |
4184 | vcpu->arch.regs[VCPU_REGS_RDX] = (data >> 32) & -1u; | |
6aa8b732 AK |
4185 | skip_emulated_instruction(vcpu); |
4186 | return 1; | |
4187 | } | |
4188 | ||
851ba692 | 4189 | static int handle_wrmsr(struct kvm_vcpu *vcpu) |
6aa8b732 | 4190 | { |
ad312c7c ZX |
4191 | u32 ecx = vcpu->arch.regs[VCPU_REGS_RCX]; |
4192 | u64 data = (vcpu->arch.regs[VCPU_REGS_RAX] & -1u) | |
4193 | | ((u64)(vcpu->arch.regs[VCPU_REGS_RDX] & -1u) << 32); | |
6aa8b732 AK |
4194 | |
4195 | if (vmx_set_msr(vcpu, ecx, data) != 0) { | |
59200273 | 4196 | trace_kvm_msr_write_ex(ecx, data); |
c1a5d4f9 | 4197 | kvm_inject_gp(vcpu, 0); |
6aa8b732 AK |
4198 | return 1; |
4199 | } | |
4200 | ||
59200273 | 4201 | trace_kvm_msr_write(ecx, data); |
6aa8b732 AK |
4202 | skip_emulated_instruction(vcpu); |
4203 | return 1; | |
4204 | } | |
4205 | ||
851ba692 | 4206 | static int handle_tpr_below_threshold(struct kvm_vcpu *vcpu) |
6e5d865c | 4207 | { |
3842d135 | 4208 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
6e5d865c YS |
4209 | return 1; |
4210 | } | |
4211 | ||
851ba692 | 4212 | static int handle_interrupt_window(struct kvm_vcpu *vcpu) |
6aa8b732 | 4213 | { |
85f455f7 ED |
4214 | u32 cpu_based_vm_exec_control; |
4215 | ||
4216 | /* clear pending irq */ | |
4217 | cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL); | |
4218 | cpu_based_vm_exec_control &= ~CPU_BASED_VIRTUAL_INTR_PENDING; | |
4219 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control); | |
2714d1d3 | 4220 | |
3842d135 AK |
4221 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
4222 | ||
a26bf12a | 4223 | ++vcpu->stat.irq_window_exits; |
2714d1d3 | 4224 | |
c1150d8c DL |
4225 | /* |
4226 | * If the user space waits to inject interrupts, exit as soon as | |
4227 | * possible | |
4228 | */ | |
8061823a | 4229 | if (!irqchip_in_kernel(vcpu->kvm) && |
851ba692 | 4230 | vcpu->run->request_interrupt_window && |
8061823a | 4231 | !kvm_cpu_has_interrupt(vcpu)) { |
851ba692 | 4232 | vcpu->run->exit_reason = KVM_EXIT_IRQ_WINDOW_OPEN; |
c1150d8c DL |
4233 | return 0; |
4234 | } | |
6aa8b732 AK |
4235 | return 1; |
4236 | } | |
4237 | ||
851ba692 | 4238 | static int handle_halt(struct kvm_vcpu *vcpu) |
6aa8b732 AK |
4239 | { |
4240 | skip_emulated_instruction(vcpu); | |
d3bef15f | 4241 | return kvm_emulate_halt(vcpu); |
6aa8b732 AK |
4242 | } |
4243 | ||
851ba692 | 4244 | static int handle_vmcall(struct kvm_vcpu *vcpu) |
c21415e8 | 4245 | { |
510043da | 4246 | skip_emulated_instruction(vcpu); |
7aa81cc0 AL |
4247 | kvm_emulate_hypercall(vcpu); |
4248 | return 1; | |
c21415e8 IM |
4249 | } |
4250 | ||
851ba692 | 4251 | static int handle_vmx_insn(struct kvm_vcpu *vcpu) |
e3c7cb6a AK |
4252 | { |
4253 | kvm_queue_exception(vcpu, UD_VECTOR); | |
4254 | return 1; | |
4255 | } | |
4256 | ||
ec25d5e6 GN |
4257 | static int handle_invd(struct kvm_vcpu *vcpu) |
4258 | { | |
51d8b661 | 4259 | return emulate_instruction(vcpu, 0) == EMULATE_DONE; |
ec25d5e6 GN |
4260 | } |
4261 | ||
851ba692 | 4262 | static int handle_invlpg(struct kvm_vcpu *vcpu) |
a7052897 | 4263 | { |
f9c617f6 | 4264 | unsigned long exit_qualification = vmcs_readl(EXIT_QUALIFICATION); |
a7052897 MT |
4265 | |
4266 | kvm_mmu_invlpg(vcpu, exit_qualification); | |
4267 | skip_emulated_instruction(vcpu); | |
4268 | return 1; | |
4269 | } | |
4270 | ||
851ba692 | 4271 | static int handle_wbinvd(struct kvm_vcpu *vcpu) |
e5edaa01 ED |
4272 | { |
4273 | skip_emulated_instruction(vcpu); | |
f5f48ee1 | 4274 | kvm_emulate_wbinvd(vcpu); |
e5edaa01 ED |
4275 | return 1; |
4276 | } | |
4277 | ||
2acf923e DC |
4278 | static int handle_xsetbv(struct kvm_vcpu *vcpu) |
4279 | { | |
4280 | u64 new_bv = kvm_read_edx_eax(vcpu); | |
4281 | u32 index = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
4282 | ||
4283 | if (kvm_set_xcr(vcpu, index, new_bv) == 0) | |
4284 | skip_emulated_instruction(vcpu); | |
4285 | return 1; | |
4286 | } | |
4287 | ||
851ba692 | 4288 | static int handle_apic_access(struct kvm_vcpu *vcpu) |
f78e0e2e | 4289 | { |
51d8b661 | 4290 | return emulate_instruction(vcpu, 0) == EMULATE_DONE; |
f78e0e2e SY |
4291 | } |
4292 | ||
851ba692 | 4293 | static int handle_task_switch(struct kvm_vcpu *vcpu) |
37817f29 | 4294 | { |
60637aac | 4295 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
37817f29 | 4296 | unsigned long exit_qualification; |
e269fb21 JK |
4297 | bool has_error_code = false; |
4298 | u32 error_code = 0; | |
37817f29 | 4299 | u16 tss_selector; |
64a7ec06 GN |
4300 | int reason, type, idt_v; |
4301 | ||
4302 | idt_v = (vmx->idt_vectoring_info & VECTORING_INFO_VALID_MASK); | |
4303 | type = (vmx->idt_vectoring_info & VECTORING_INFO_TYPE_MASK); | |
37817f29 IE |
4304 | |
4305 | exit_qualification = vmcs_readl(EXIT_QUALIFICATION); | |
4306 | ||
4307 | reason = (u32)exit_qualification >> 30; | |
64a7ec06 GN |
4308 | if (reason == TASK_SWITCH_GATE && idt_v) { |
4309 | switch (type) { | |
4310 | case INTR_TYPE_NMI_INTR: | |
4311 | vcpu->arch.nmi_injected = false; | |
654f06fc | 4312 | vmx_set_nmi_mask(vcpu, true); |
64a7ec06 GN |
4313 | break; |
4314 | case INTR_TYPE_EXT_INTR: | |
66fd3f7f | 4315 | case INTR_TYPE_SOFT_INTR: |
64a7ec06 GN |
4316 | kvm_clear_interrupt_queue(vcpu); |
4317 | break; | |
4318 | case INTR_TYPE_HARD_EXCEPTION: | |
e269fb21 JK |
4319 | if (vmx->idt_vectoring_info & |
4320 | VECTORING_INFO_DELIVER_CODE_MASK) { | |
4321 | has_error_code = true; | |
4322 | error_code = | |
4323 | vmcs_read32(IDT_VECTORING_ERROR_CODE); | |
4324 | } | |
4325 | /* fall through */ | |
64a7ec06 GN |
4326 | case INTR_TYPE_SOFT_EXCEPTION: |
4327 | kvm_clear_exception_queue(vcpu); | |
4328 | break; | |
4329 | default: | |
4330 | break; | |
4331 | } | |
60637aac | 4332 | } |
37817f29 IE |
4333 | tss_selector = exit_qualification; |
4334 | ||
64a7ec06 GN |
4335 | if (!idt_v || (type != INTR_TYPE_HARD_EXCEPTION && |
4336 | type != INTR_TYPE_EXT_INTR && | |
4337 | type != INTR_TYPE_NMI_INTR)) | |
4338 | skip_emulated_instruction(vcpu); | |
4339 | ||
acb54517 GN |
4340 | if (kvm_task_switch(vcpu, tss_selector, reason, |
4341 | has_error_code, error_code) == EMULATE_FAIL) { | |
4342 | vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR; | |
4343 | vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION; | |
4344 | vcpu->run->internal.ndata = 0; | |
42dbaa5a | 4345 | return 0; |
acb54517 | 4346 | } |
42dbaa5a JK |
4347 | |
4348 | /* clear all local breakpoint enable flags */ | |
4349 | vmcs_writel(GUEST_DR7, vmcs_readl(GUEST_DR7) & ~55); | |
4350 | ||
4351 | /* | |
4352 | * TODO: What about debug traps on tss switch? | |
4353 | * Are we supposed to inject them and update dr6? | |
4354 | */ | |
4355 | ||
4356 | return 1; | |
37817f29 IE |
4357 | } |
4358 | ||
851ba692 | 4359 | static int handle_ept_violation(struct kvm_vcpu *vcpu) |
1439442c | 4360 | { |
f9c617f6 | 4361 | unsigned long exit_qualification; |
1439442c | 4362 | gpa_t gpa; |
1439442c | 4363 | int gla_validity; |
1439442c | 4364 | |
f9c617f6 | 4365 | exit_qualification = vmcs_readl(EXIT_QUALIFICATION); |
1439442c SY |
4366 | |
4367 | if (exit_qualification & (1 << 6)) { | |
4368 | printk(KERN_ERR "EPT: GPA exceeds GAW!\n"); | |
7f582ab6 | 4369 | return -EINVAL; |
1439442c SY |
4370 | } |
4371 | ||
4372 | gla_validity = (exit_qualification >> 7) & 0x3; | |
4373 | if (gla_validity != 0x3 && gla_validity != 0x1 && gla_validity != 0) { | |
4374 | printk(KERN_ERR "EPT: Handling EPT violation failed!\n"); | |
4375 | printk(KERN_ERR "EPT: GPA: 0x%lx, GVA: 0x%lx\n", | |
4376 | (long unsigned int)vmcs_read64(GUEST_PHYSICAL_ADDRESS), | |
f9c617f6 | 4377 | vmcs_readl(GUEST_LINEAR_ADDRESS)); |
1439442c SY |
4378 | printk(KERN_ERR "EPT: Exit qualification is 0x%lx\n", |
4379 | (long unsigned int)exit_qualification); | |
851ba692 AK |
4380 | vcpu->run->exit_reason = KVM_EXIT_UNKNOWN; |
4381 | vcpu->run->hw.hardware_exit_reason = EXIT_REASON_EPT_VIOLATION; | |
596ae895 | 4382 | return 0; |
1439442c SY |
4383 | } |
4384 | ||
4385 | gpa = vmcs_read64(GUEST_PHYSICAL_ADDRESS); | |
229456fc | 4386 | trace_kvm_page_fault(gpa, exit_qualification); |
dc25e89e | 4387 | return kvm_mmu_page_fault(vcpu, gpa, exit_qualification & 0x3, NULL, 0); |
1439442c SY |
4388 | } |
4389 | ||
68f89400 MT |
4390 | static u64 ept_rsvd_mask(u64 spte, int level) |
4391 | { | |
4392 | int i; | |
4393 | u64 mask = 0; | |
4394 | ||
4395 | for (i = 51; i > boot_cpu_data.x86_phys_bits; i--) | |
4396 | mask |= (1ULL << i); | |
4397 | ||
4398 | if (level > 2) | |
4399 | /* bits 7:3 reserved */ | |
4400 | mask |= 0xf8; | |
4401 | else if (level == 2) { | |
4402 | if (spte & (1ULL << 7)) | |
4403 | /* 2MB ref, bits 20:12 reserved */ | |
4404 | mask |= 0x1ff000; | |
4405 | else | |
4406 | /* bits 6:3 reserved */ | |
4407 | mask |= 0x78; | |
4408 | } | |
4409 | ||
4410 | return mask; | |
4411 | } | |
4412 | ||
4413 | static void ept_misconfig_inspect_spte(struct kvm_vcpu *vcpu, u64 spte, | |
4414 | int level) | |
4415 | { | |
4416 | printk(KERN_ERR "%s: spte 0x%llx level %d\n", __func__, spte, level); | |
4417 | ||
4418 | /* 010b (write-only) */ | |
4419 | WARN_ON((spte & 0x7) == 0x2); | |
4420 | ||
4421 | /* 110b (write/execute) */ | |
4422 | WARN_ON((spte & 0x7) == 0x6); | |
4423 | ||
4424 | /* 100b (execute-only) and value not supported by logical processor */ | |
4425 | if (!cpu_has_vmx_ept_execute_only()) | |
4426 | WARN_ON((spte & 0x7) == 0x4); | |
4427 | ||
4428 | /* not 000b */ | |
4429 | if ((spte & 0x7)) { | |
4430 | u64 rsvd_bits = spte & ept_rsvd_mask(spte, level); | |
4431 | ||
4432 | if (rsvd_bits != 0) { | |
4433 | printk(KERN_ERR "%s: rsvd_bits = 0x%llx\n", | |
4434 | __func__, rsvd_bits); | |
4435 | WARN_ON(1); | |
4436 | } | |
4437 | ||
4438 | if (level == 1 || (level == 2 && (spte & (1ULL << 7)))) { | |
4439 | u64 ept_mem_type = (spte & 0x38) >> 3; | |
4440 | ||
4441 | if (ept_mem_type == 2 || ept_mem_type == 3 || | |
4442 | ept_mem_type == 7) { | |
4443 | printk(KERN_ERR "%s: ept_mem_type=0x%llx\n", | |
4444 | __func__, ept_mem_type); | |
4445 | WARN_ON(1); | |
4446 | } | |
4447 | } | |
4448 | } | |
4449 | } | |
4450 | ||
851ba692 | 4451 | static int handle_ept_misconfig(struct kvm_vcpu *vcpu) |
68f89400 MT |
4452 | { |
4453 | u64 sptes[4]; | |
4454 | int nr_sptes, i; | |
4455 | gpa_t gpa; | |
4456 | ||
4457 | gpa = vmcs_read64(GUEST_PHYSICAL_ADDRESS); | |
4458 | ||
4459 | printk(KERN_ERR "EPT: Misconfiguration.\n"); | |
4460 | printk(KERN_ERR "EPT: GPA: 0x%llx\n", gpa); | |
4461 | ||
4462 | nr_sptes = kvm_mmu_get_spte_hierarchy(vcpu, gpa, sptes); | |
4463 | ||
4464 | for (i = PT64_ROOT_LEVEL; i > PT64_ROOT_LEVEL - nr_sptes; --i) | |
4465 | ept_misconfig_inspect_spte(vcpu, sptes[i-1], i); | |
4466 | ||
851ba692 AK |
4467 | vcpu->run->exit_reason = KVM_EXIT_UNKNOWN; |
4468 | vcpu->run->hw.hardware_exit_reason = EXIT_REASON_EPT_MISCONFIG; | |
68f89400 MT |
4469 | |
4470 | return 0; | |
4471 | } | |
4472 | ||
851ba692 | 4473 | static int handle_nmi_window(struct kvm_vcpu *vcpu) |
f08864b4 SY |
4474 | { |
4475 | u32 cpu_based_vm_exec_control; | |
4476 | ||
4477 | /* clear pending NMI */ | |
4478 | cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL); | |
4479 | cpu_based_vm_exec_control &= ~CPU_BASED_VIRTUAL_NMI_PENDING; | |
4480 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control); | |
4481 | ++vcpu->stat.nmi_window_exits; | |
3842d135 | 4482 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
f08864b4 SY |
4483 | |
4484 | return 1; | |
4485 | } | |
4486 | ||
80ced186 | 4487 | static int handle_invalid_guest_state(struct kvm_vcpu *vcpu) |
ea953ef0 | 4488 | { |
8b3079a5 AK |
4489 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
4490 | enum emulation_result err = EMULATE_DONE; | |
80ced186 | 4491 | int ret = 1; |
49e9d557 AK |
4492 | u32 cpu_exec_ctrl; |
4493 | bool intr_window_requested; | |
4494 | ||
4495 | cpu_exec_ctrl = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL); | |
4496 | intr_window_requested = cpu_exec_ctrl & CPU_BASED_VIRTUAL_INTR_PENDING; | |
ea953ef0 MG |
4497 | |
4498 | while (!guest_state_valid(vcpu)) { | |
49e9d557 AK |
4499 | if (intr_window_requested |
4500 | && (kvm_get_rflags(&vmx->vcpu) & X86_EFLAGS_IF)) | |
4501 | return handle_interrupt_window(&vmx->vcpu); | |
4502 | ||
51d8b661 | 4503 | err = emulate_instruction(vcpu, 0); |
ea953ef0 | 4504 | |
80ced186 MG |
4505 | if (err == EMULATE_DO_MMIO) { |
4506 | ret = 0; | |
4507 | goto out; | |
4508 | } | |
1d5a4d9b | 4509 | |
6d77dbfc GN |
4510 | if (err != EMULATE_DONE) |
4511 | return 0; | |
ea953ef0 MG |
4512 | |
4513 | if (signal_pending(current)) | |
80ced186 | 4514 | goto out; |
ea953ef0 MG |
4515 | if (need_resched()) |
4516 | schedule(); | |
4517 | } | |
4518 | ||
80ced186 MG |
4519 | vmx->emulation_required = 0; |
4520 | out: | |
4521 | return ret; | |
ea953ef0 MG |
4522 | } |
4523 | ||
4b8d54f9 ZE |
4524 | /* |
4525 | * Indicate a busy-waiting vcpu in spinlock. We do not enable the PAUSE | |
4526 | * exiting, so only get here on cpu with PAUSE-Loop-Exiting. | |
4527 | */ | |
9fb41ba8 | 4528 | static int handle_pause(struct kvm_vcpu *vcpu) |
4b8d54f9 ZE |
4529 | { |
4530 | skip_emulated_instruction(vcpu); | |
4531 | kvm_vcpu_on_spin(vcpu); | |
4532 | ||
4533 | return 1; | |
4534 | } | |
4535 | ||
59708670 SY |
4536 | static int handle_invalid_op(struct kvm_vcpu *vcpu) |
4537 | { | |
4538 | kvm_queue_exception(vcpu, UD_VECTOR); | |
4539 | return 1; | |
4540 | } | |
4541 | ||
ff2f6fe9 NHE |
4542 | /* |
4543 | * To run an L2 guest, we need a vmcs02 based on the L1-specified vmcs12. | |
4544 | * We could reuse a single VMCS for all the L2 guests, but we also want the | |
4545 | * option to allocate a separate vmcs02 for each separate loaded vmcs12 - this | |
4546 | * allows keeping them loaded on the processor, and in the future will allow | |
4547 | * optimizations where prepare_vmcs02 doesn't need to set all the fields on | |
4548 | * every entry if they never change. | |
4549 | * So we keep, in vmx->nested.vmcs02_pool, a cache of size VMCS02_POOL_SIZE | |
4550 | * (>=0) with a vmcs02 for each recently loaded vmcs12s, most recent first. | |
4551 | * | |
4552 | * The following functions allocate and free a vmcs02 in this pool. | |
4553 | */ | |
4554 | ||
4555 | /* Get a VMCS from the pool to use as vmcs02 for the current vmcs12. */ | |
4556 | static struct loaded_vmcs *nested_get_current_vmcs02(struct vcpu_vmx *vmx) | |
4557 | { | |
4558 | struct vmcs02_list *item; | |
4559 | list_for_each_entry(item, &vmx->nested.vmcs02_pool, list) | |
4560 | if (item->vmptr == vmx->nested.current_vmptr) { | |
4561 | list_move(&item->list, &vmx->nested.vmcs02_pool); | |
4562 | return &item->vmcs02; | |
4563 | } | |
4564 | ||
4565 | if (vmx->nested.vmcs02_num >= max(VMCS02_POOL_SIZE, 1)) { | |
4566 | /* Recycle the least recently used VMCS. */ | |
4567 | item = list_entry(vmx->nested.vmcs02_pool.prev, | |
4568 | struct vmcs02_list, list); | |
4569 | item->vmptr = vmx->nested.current_vmptr; | |
4570 | list_move(&item->list, &vmx->nested.vmcs02_pool); | |
4571 | return &item->vmcs02; | |
4572 | } | |
4573 | ||
4574 | /* Create a new VMCS */ | |
4575 | item = (struct vmcs02_list *) | |
4576 | kmalloc(sizeof(struct vmcs02_list), GFP_KERNEL); | |
4577 | if (!item) | |
4578 | return NULL; | |
4579 | item->vmcs02.vmcs = alloc_vmcs(); | |
4580 | if (!item->vmcs02.vmcs) { | |
4581 | kfree(item); | |
4582 | return NULL; | |
4583 | } | |
4584 | loaded_vmcs_init(&item->vmcs02); | |
4585 | item->vmptr = vmx->nested.current_vmptr; | |
4586 | list_add(&(item->list), &(vmx->nested.vmcs02_pool)); | |
4587 | vmx->nested.vmcs02_num++; | |
4588 | return &item->vmcs02; | |
4589 | } | |
4590 | ||
4591 | /* Free and remove from pool a vmcs02 saved for a vmcs12 (if there is one) */ | |
4592 | static void nested_free_vmcs02(struct vcpu_vmx *vmx, gpa_t vmptr) | |
4593 | { | |
4594 | struct vmcs02_list *item; | |
4595 | list_for_each_entry(item, &vmx->nested.vmcs02_pool, list) | |
4596 | if (item->vmptr == vmptr) { | |
4597 | free_loaded_vmcs(&item->vmcs02); | |
4598 | list_del(&item->list); | |
4599 | kfree(item); | |
4600 | vmx->nested.vmcs02_num--; | |
4601 | return; | |
4602 | } | |
4603 | } | |
4604 | ||
4605 | /* | |
4606 | * Free all VMCSs saved for this vcpu, except the one pointed by | |
4607 | * vmx->loaded_vmcs. These include the VMCSs in vmcs02_pool (except the one | |
4608 | * currently used, if running L2), and vmcs01 when running L2. | |
4609 | */ | |
4610 | static void nested_free_all_saved_vmcss(struct vcpu_vmx *vmx) | |
4611 | { | |
4612 | struct vmcs02_list *item, *n; | |
4613 | list_for_each_entry_safe(item, n, &vmx->nested.vmcs02_pool, list) { | |
4614 | if (vmx->loaded_vmcs != &item->vmcs02) | |
4615 | free_loaded_vmcs(&item->vmcs02); | |
4616 | list_del(&item->list); | |
4617 | kfree(item); | |
4618 | } | |
4619 | vmx->nested.vmcs02_num = 0; | |
4620 | ||
4621 | if (vmx->loaded_vmcs != &vmx->vmcs01) | |
4622 | free_loaded_vmcs(&vmx->vmcs01); | |
4623 | } | |
4624 | ||
ec378aee NHE |
4625 | /* |
4626 | * Emulate the VMXON instruction. | |
4627 | * Currently, we just remember that VMX is active, and do not save or even | |
4628 | * inspect the argument to VMXON (the so-called "VMXON pointer") because we | |
4629 | * do not currently need to store anything in that guest-allocated memory | |
4630 | * region. Consequently, VMCLEAR and VMPTRLD also do not verify that the their | |
4631 | * argument is different from the VMXON pointer (which the spec says they do). | |
4632 | */ | |
4633 | static int handle_vmon(struct kvm_vcpu *vcpu) | |
4634 | { | |
4635 | struct kvm_segment cs; | |
4636 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
4637 | ||
4638 | /* The Intel VMX Instruction Reference lists a bunch of bits that | |
4639 | * are prerequisite to running VMXON, most notably cr4.VMXE must be | |
4640 | * set to 1 (see vmx_set_cr4() for when we allow the guest to set this). | |
4641 | * Otherwise, we should fail with #UD. We test these now: | |
4642 | */ | |
4643 | if (!kvm_read_cr4_bits(vcpu, X86_CR4_VMXE) || | |
4644 | !kvm_read_cr0_bits(vcpu, X86_CR0_PE) || | |
4645 | (vmx_get_rflags(vcpu) & X86_EFLAGS_VM)) { | |
4646 | kvm_queue_exception(vcpu, UD_VECTOR); | |
4647 | return 1; | |
4648 | } | |
4649 | ||
4650 | vmx_get_segment(vcpu, &cs, VCPU_SREG_CS); | |
4651 | if (is_long_mode(vcpu) && !cs.l) { | |
4652 | kvm_queue_exception(vcpu, UD_VECTOR); | |
4653 | return 1; | |
4654 | } | |
4655 | ||
4656 | if (vmx_get_cpl(vcpu)) { | |
4657 | kvm_inject_gp(vcpu, 0); | |
4658 | return 1; | |
4659 | } | |
4660 | ||
ff2f6fe9 NHE |
4661 | INIT_LIST_HEAD(&(vmx->nested.vmcs02_pool)); |
4662 | vmx->nested.vmcs02_num = 0; | |
4663 | ||
ec378aee NHE |
4664 | vmx->nested.vmxon = true; |
4665 | ||
4666 | skip_emulated_instruction(vcpu); | |
4667 | return 1; | |
4668 | } | |
4669 | ||
4670 | /* | |
4671 | * Intel's VMX Instruction Reference specifies a common set of prerequisites | |
4672 | * for running VMX instructions (except VMXON, whose prerequisites are | |
4673 | * slightly different). It also specifies what exception to inject otherwise. | |
4674 | */ | |
4675 | static int nested_vmx_check_permission(struct kvm_vcpu *vcpu) | |
4676 | { | |
4677 | struct kvm_segment cs; | |
4678 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
4679 | ||
4680 | if (!vmx->nested.vmxon) { | |
4681 | kvm_queue_exception(vcpu, UD_VECTOR); | |
4682 | return 0; | |
4683 | } | |
4684 | ||
4685 | vmx_get_segment(vcpu, &cs, VCPU_SREG_CS); | |
4686 | if ((vmx_get_rflags(vcpu) & X86_EFLAGS_VM) || | |
4687 | (is_long_mode(vcpu) && !cs.l)) { | |
4688 | kvm_queue_exception(vcpu, UD_VECTOR); | |
4689 | return 0; | |
4690 | } | |
4691 | ||
4692 | if (vmx_get_cpl(vcpu)) { | |
4693 | kvm_inject_gp(vcpu, 0); | |
4694 | return 0; | |
4695 | } | |
4696 | ||
4697 | return 1; | |
4698 | } | |
4699 | ||
4700 | /* | |
4701 | * Free whatever needs to be freed from vmx->nested when L1 goes down, or | |
4702 | * just stops using VMX. | |
4703 | */ | |
4704 | static void free_nested(struct vcpu_vmx *vmx) | |
4705 | { | |
4706 | if (!vmx->nested.vmxon) | |
4707 | return; | |
4708 | vmx->nested.vmxon = false; | |
a9d30f33 NHE |
4709 | if (vmx->nested.current_vmptr != -1ull) { |
4710 | kunmap(vmx->nested.current_vmcs12_page); | |
4711 | nested_release_page(vmx->nested.current_vmcs12_page); | |
4712 | vmx->nested.current_vmptr = -1ull; | |
4713 | vmx->nested.current_vmcs12 = NULL; | |
4714 | } | |
ff2f6fe9 NHE |
4715 | |
4716 | nested_free_all_saved_vmcss(vmx); | |
ec378aee NHE |
4717 | } |
4718 | ||
4719 | /* Emulate the VMXOFF instruction */ | |
4720 | static int handle_vmoff(struct kvm_vcpu *vcpu) | |
4721 | { | |
4722 | if (!nested_vmx_check_permission(vcpu)) | |
4723 | return 1; | |
4724 | free_nested(to_vmx(vcpu)); | |
4725 | skip_emulated_instruction(vcpu); | |
4726 | return 1; | |
4727 | } | |
4728 | ||
064aea77 NHE |
4729 | /* |
4730 | * Decode the memory-address operand of a vmx instruction, as recorded on an | |
4731 | * exit caused by such an instruction (run by a guest hypervisor). | |
4732 | * On success, returns 0. When the operand is invalid, returns 1 and throws | |
4733 | * #UD or #GP. | |
4734 | */ | |
4735 | static int get_vmx_mem_address(struct kvm_vcpu *vcpu, | |
4736 | unsigned long exit_qualification, | |
4737 | u32 vmx_instruction_info, gva_t *ret) | |
4738 | { | |
4739 | /* | |
4740 | * According to Vol. 3B, "Information for VM Exits Due to Instruction | |
4741 | * Execution", on an exit, vmx_instruction_info holds most of the | |
4742 | * addressing components of the operand. Only the displacement part | |
4743 | * is put in exit_qualification (see 3B, "Basic VM-Exit Information"). | |
4744 | * For how an actual address is calculated from all these components, | |
4745 | * refer to Vol. 1, "Operand Addressing". | |
4746 | */ | |
4747 | int scaling = vmx_instruction_info & 3; | |
4748 | int addr_size = (vmx_instruction_info >> 7) & 7; | |
4749 | bool is_reg = vmx_instruction_info & (1u << 10); | |
4750 | int seg_reg = (vmx_instruction_info >> 15) & 7; | |
4751 | int index_reg = (vmx_instruction_info >> 18) & 0xf; | |
4752 | bool index_is_valid = !(vmx_instruction_info & (1u << 22)); | |
4753 | int base_reg = (vmx_instruction_info >> 23) & 0xf; | |
4754 | bool base_is_valid = !(vmx_instruction_info & (1u << 27)); | |
4755 | ||
4756 | if (is_reg) { | |
4757 | kvm_queue_exception(vcpu, UD_VECTOR); | |
4758 | return 1; | |
4759 | } | |
4760 | ||
4761 | /* Addr = segment_base + offset */ | |
4762 | /* offset = base + [index * scale] + displacement */ | |
4763 | *ret = vmx_get_segment_base(vcpu, seg_reg); | |
4764 | if (base_is_valid) | |
4765 | *ret += kvm_register_read(vcpu, base_reg); | |
4766 | if (index_is_valid) | |
4767 | *ret += kvm_register_read(vcpu, index_reg)<<scaling; | |
4768 | *ret += exit_qualification; /* holds the displacement */ | |
4769 | ||
4770 | if (addr_size == 1) /* 32 bit */ | |
4771 | *ret &= 0xffffffff; | |
4772 | ||
4773 | /* | |
4774 | * TODO: throw #GP (and return 1) in various cases that the VM* | |
4775 | * instructions require it - e.g., offset beyond segment limit, | |
4776 | * unusable or unreadable/unwritable segment, non-canonical 64-bit | |
4777 | * address, and so on. Currently these are not checked. | |
4778 | */ | |
4779 | return 0; | |
4780 | } | |
4781 | ||
0140caea NHE |
4782 | /* |
4783 | * The following 3 functions, nested_vmx_succeed()/failValid()/failInvalid(), | |
4784 | * set the success or error code of an emulated VMX instruction, as specified | |
4785 | * by Vol 2B, VMX Instruction Reference, "Conventions". | |
4786 | */ | |
4787 | static void nested_vmx_succeed(struct kvm_vcpu *vcpu) | |
4788 | { | |
4789 | vmx_set_rflags(vcpu, vmx_get_rflags(vcpu) | |
4790 | & ~(X86_EFLAGS_CF | X86_EFLAGS_PF | X86_EFLAGS_AF | | |
4791 | X86_EFLAGS_ZF | X86_EFLAGS_SF | X86_EFLAGS_OF)); | |
4792 | } | |
4793 | ||
4794 | static void nested_vmx_failInvalid(struct kvm_vcpu *vcpu) | |
4795 | { | |
4796 | vmx_set_rflags(vcpu, (vmx_get_rflags(vcpu) | |
4797 | & ~(X86_EFLAGS_PF | X86_EFLAGS_AF | X86_EFLAGS_ZF | | |
4798 | X86_EFLAGS_SF | X86_EFLAGS_OF)) | |
4799 | | X86_EFLAGS_CF); | |
4800 | } | |
4801 | ||
4802 | static void nested_vmx_failValid(struct kvm_vcpu *vcpu, | |
4803 | u32 vm_instruction_error) | |
4804 | { | |
4805 | if (to_vmx(vcpu)->nested.current_vmptr == -1ull) { | |
4806 | /* | |
4807 | * failValid writes the error number to the current VMCS, which | |
4808 | * can't be done there isn't a current VMCS. | |
4809 | */ | |
4810 | nested_vmx_failInvalid(vcpu); | |
4811 | return; | |
4812 | } | |
4813 | vmx_set_rflags(vcpu, (vmx_get_rflags(vcpu) | |
4814 | & ~(X86_EFLAGS_CF | X86_EFLAGS_PF | X86_EFLAGS_AF | | |
4815 | X86_EFLAGS_SF | X86_EFLAGS_OF)) | |
4816 | | X86_EFLAGS_ZF); | |
4817 | get_vmcs12(vcpu)->vm_instruction_error = vm_instruction_error; | |
4818 | } | |
4819 | ||
27d6c865 NHE |
4820 | /* Emulate the VMCLEAR instruction */ |
4821 | static int handle_vmclear(struct kvm_vcpu *vcpu) | |
4822 | { | |
4823 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
4824 | gva_t gva; | |
4825 | gpa_t vmptr; | |
4826 | struct vmcs12 *vmcs12; | |
4827 | struct page *page; | |
4828 | struct x86_exception e; | |
4829 | ||
4830 | if (!nested_vmx_check_permission(vcpu)) | |
4831 | return 1; | |
4832 | ||
4833 | if (get_vmx_mem_address(vcpu, vmcs_readl(EXIT_QUALIFICATION), | |
4834 | vmcs_read32(VMX_INSTRUCTION_INFO), &gva)) | |
4835 | return 1; | |
4836 | ||
4837 | if (kvm_read_guest_virt(&vcpu->arch.emulate_ctxt, gva, &vmptr, | |
4838 | sizeof(vmptr), &e)) { | |
4839 | kvm_inject_page_fault(vcpu, &e); | |
4840 | return 1; | |
4841 | } | |
4842 | ||
4843 | if (!IS_ALIGNED(vmptr, PAGE_SIZE)) { | |
4844 | nested_vmx_failValid(vcpu, VMXERR_VMCLEAR_INVALID_ADDRESS); | |
4845 | skip_emulated_instruction(vcpu); | |
4846 | return 1; | |
4847 | } | |
4848 | ||
4849 | if (vmptr == vmx->nested.current_vmptr) { | |
4850 | kunmap(vmx->nested.current_vmcs12_page); | |
4851 | nested_release_page(vmx->nested.current_vmcs12_page); | |
4852 | vmx->nested.current_vmptr = -1ull; | |
4853 | vmx->nested.current_vmcs12 = NULL; | |
4854 | } | |
4855 | ||
4856 | page = nested_get_page(vcpu, vmptr); | |
4857 | if (page == NULL) { | |
4858 | /* | |
4859 | * For accurate processor emulation, VMCLEAR beyond available | |
4860 | * physical memory should do nothing at all. However, it is | |
4861 | * possible that a nested vmx bug, not a guest hypervisor bug, | |
4862 | * resulted in this case, so let's shut down before doing any | |
4863 | * more damage: | |
4864 | */ | |
4865 | kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu); | |
4866 | return 1; | |
4867 | } | |
4868 | vmcs12 = kmap(page); | |
4869 | vmcs12->launch_state = 0; | |
4870 | kunmap(page); | |
4871 | nested_release_page(page); | |
4872 | ||
4873 | nested_free_vmcs02(vmx, vmptr); | |
4874 | ||
4875 | skip_emulated_instruction(vcpu); | |
4876 | nested_vmx_succeed(vcpu); | |
4877 | return 1; | |
4878 | } | |
4879 | ||
63846663 NHE |
4880 | /* Emulate the VMPTRLD instruction */ |
4881 | static int handle_vmptrld(struct kvm_vcpu *vcpu) | |
4882 | { | |
4883 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
4884 | gva_t gva; | |
4885 | gpa_t vmptr; | |
4886 | struct x86_exception e; | |
4887 | ||
4888 | if (!nested_vmx_check_permission(vcpu)) | |
4889 | return 1; | |
4890 | ||
4891 | if (get_vmx_mem_address(vcpu, vmcs_readl(EXIT_QUALIFICATION), | |
4892 | vmcs_read32(VMX_INSTRUCTION_INFO), &gva)) | |
4893 | return 1; | |
4894 | ||
4895 | if (kvm_read_guest_virt(&vcpu->arch.emulate_ctxt, gva, &vmptr, | |
4896 | sizeof(vmptr), &e)) { | |
4897 | kvm_inject_page_fault(vcpu, &e); | |
4898 | return 1; | |
4899 | } | |
4900 | ||
4901 | if (!IS_ALIGNED(vmptr, PAGE_SIZE)) { | |
4902 | nested_vmx_failValid(vcpu, VMXERR_VMPTRLD_INVALID_ADDRESS); | |
4903 | skip_emulated_instruction(vcpu); | |
4904 | return 1; | |
4905 | } | |
4906 | ||
4907 | if (vmx->nested.current_vmptr != vmptr) { | |
4908 | struct vmcs12 *new_vmcs12; | |
4909 | struct page *page; | |
4910 | page = nested_get_page(vcpu, vmptr); | |
4911 | if (page == NULL) { | |
4912 | nested_vmx_failInvalid(vcpu); | |
4913 | skip_emulated_instruction(vcpu); | |
4914 | return 1; | |
4915 | } | |
4916 | new_vmcs12 = kmap(page); | |
4917 | if (new_vmcs12->revision_id != VMCS12_REVISION) { | |
4918 | kunmap(page); | |
4919 | nested_release_page_clean(page); | |
4920 | nested_vmx_failValid(vcpu, | |
4921 | VMXERR_VMPTRLD_INCORRECT_VMCS_REVISION_ID); | |
4922 | skip_emulated_instruction(vcpu); | |
4923 | return 1; | |
4924 | } | |
4925 | if (vmx->nested.current_vmptr != -1ull) { | |
4926 | kunmap(vmx->nested.current_vmcs12_page); | |
4927 | nested_release_page(vmx->nested.current_vmcs12_page); | |
4928 | } | |
4929 | ||
4930 | vmx->nested.current_vmptr = vmptr; | |
4931 | vmx->nested.current_vmcs12 = new_vmcs12; | |
4932 | vmx->nested.current_vmcs12_page = page; | |
4933 | } | |
4934 | ||
4935 | nested_vmx_succeed(vcpu); | |
4936 | skip_emulated_instruction(vcpu); | |
4937 | return 1; | |
4938 | } | |
4939 | ||
6a4d7550 NHE |
4940 | /* Emulate the VMPTRST instruction */ |
4941 | static int handle_vmptrst(struct kvm_vcpu *vcpu) | |
4942 | { | |
4943 | unsigned long exit_qualification = vmcs_readl(EXIT_QUALIFICATION); | |
4944 | u32 vmx_instruction_info = vmcs_read32(VMX_INSTRUCTION_INFO); | |
4945 | gva_t vmcs_gva; | |
4946 | struct x86_exception e; | |
4947 | ||
4948 | if (!nested_vmx_check_permission(vcpu)) | |
4949 | return 1; | |
4950 | ||
4951 | if (get_vmx_mem_address(vcpu, exit_qualification, | |
4952 | vmx_instruction_info, &vmcs_gva)) | |
4953 | return 1; | |
4954 | /* ok to use *_system, as nested_vmx_check_permission verified cpl=0 */ | |
4955 | if (kvm_write_guest_virt_system(&vcpu->arch.emulate_ctxt, vmcs_gva, | |
4956 | (void *)&to_vmx(vcpu)->nested.current_vmptr, | |
4957 | sizeof(u64), &e)) { | |
4958 | kvm_inject_page_fault(vcpu, &e); | |
4959 | return 1; | |
4960 | } | |
4961 | nested_vmx_succeed(vcpu); | |
4962 | skip_emulated_instruction(vcpu); | |
4963 | return 1; | |
4964 | } | |
4965 | ||
6aa8b732 AK |
4966 | /* |
4967 | * The exit handlers return 1 if the exit was handled fully and guest execution | |
4968 | * may resume. Otherwise they set the kvm_run parameter to indicate what needs | |
4969 | * to be done to userspace and return 0. | |
4970 | */ | |
851ba692 | 4971 | static int (*kvm_vmx_exit_handlers[])(struct kvm_vcpu *vcpu) = { |
6aa8b732 AK |
4972 | [EXIT_REASON_EXCEPTION_NMI] = handle_exception, |
4973 | [EXIT_REASON_EXTERNAL_INTERRUPT] = handle_external_interrupt, | |
988ad74f | 4974 | [EXIT_REASON_TRIPLE_FAULT] = handle_triple_fault, |
f08864b4 | 4975 | [EXIT_REASON_NMI_WINDOW] = handle_nmi_window, |
6aa8b732 | 4976 | [EXIT_REASON_IO_INSTRUCTION] = handle_io, |
6aa8b732 AK |
4977 | [EXIT_REASON_CR_ACCESS] = handle_cr, |
4978 | [EXIT_REASON_DR_ACCESS] = handle_dr, | |
4979 | [EXIT_REASON_CPUID] = handle_cpuid, | |
4980 | [EXIT_REASON_MSR_READ] = handle_rdmsr, | |
4981 | [EXIT_REASON_MSR_WRITE] = handle_wrmsr, | |
4982 | [EXIT_REASON_PENDING_INTERRUPT] = handle_interrupt_window, | |
4983 | [EXIT_REASON_HLT] = handle_halt, | |
ec25d5e6 | 4984 | [EXIT_REASON_INVD] = handle_invd, |
a7052897 | 4985 | [EXIT_REASON_INVLPG] = handle_invlpg, |
c21415e8 | 4986 | [EXIT_REASON_VMCALL] = handle_vmcall, |
27d6c865 | 4987 | [EXIT_REASON_VMCLEAR] = handle_vmclear, |
e3c7cb6a | 4988 | [EXIT_REASON_VMLAUNCH] = handle_vmx_insn, |
63846663 | 4989 | [EXIT_REASON_VMPTRLD] = handle_vmptrld, |
6a4d7550 | 4990 | [EXIT_REASON_VMPTRST] = handle_vmptrst, |
e3c7cb6a AK |
4991 | [EXIT_REASON_VMREAD] = handle_vmx_insn, |
4992 | [EXIT_REASON_VMRESUME] = handle_vmx_insn, | |
4993 | [EXIT_REASON_VMWRITE] = handle_vmx_insn, | |
ec378aee NHE |
4994 | [EXIT_REASON_VMOFF] = handle_vmoff, |
4995 | [EXIT_REASON_VMON] = handle_vmon, | |
f78e0e2e SY |
4996 | [EXIT_REASON_TPR_BELOW_THRESHOLD] = handle_tpr_below_threshold, |
4997 | [EXIT_REASON_APIC_ACCESS] = handle_apic_access, | |
e5edaa01 | 4998 | [EXIT_REASON_WBINVD] = handle_wbinvd, |
2acf923e | 4999 | [EXIT_REASON_XSETBV] = handle_xsetbv, |
37817f29 | 5000 | [EXIT_REASON_TASK_SWITCH] = handle_task_switch, |
a0861c02 | 5001 | [EXIT_REASON_MCE_DURING_VMENTRY] = handle_machine_check, |
68f89400 MT |
5002 | [EXIT_REASON_EPT_VIOLATION] = handle_ept_violation, |
5003 | [EXIT_REASON_EPT_MISCONFIG] = handle_ept_misconfig, | |
4b8d54f9 | 5004 | [EXIT_REASON_PAUSE_INSTRUCTION] = handle_pause, |
59708670 SY |
5005 | [EXIT_REASON_MWAIT_INSTRUCTION] = handle_invalid_op, |
5006 | [EXIT_REASON_MONITOR_INSTRUCTION] = handle_invalid_op, | |
6aa8b732 AK |
5007 | }; |
5008 | ||
5009 | static const int kvm_vmx_max_exit_handlers = | |
50a3485c | 5010 | ARRAY_SIZE(kvm_vmx_exit_handlers); |
6aa8b732 | 5011 | |
586f9607 AK |
5012 | static void vmx_get_exit_info(struct kvm_vcpu *vcpu, u64 *info1, u64 *info2) |
5013 | { | |
5014 | *info1 = vmcs_readl(EXIT_QUALIFICATION); | |
5015 | *info2 = vmcs_read32(VM_EXIT_INTR_INFO); | |
5016 | } | |
5017 | ||
6aa8b732 AK |
5018 | /* |
5019 | * The guest has exited. See if we can fix it or if we need userspace | |
5020 | * assistance. | |
5021 | */ | |
851ba692 | 5022 | static int vmx_handle_exit(struct kvm_vcpu *vcpu) |
6aa8b732 | 5023 | { |
29bd8a78 | 5024 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
a0861c02 | 5025 | u32 exit_reason = vmx->exit_reason; |
1155f76a | 5026 | u32 vectoring_info = vmx->idt_vectoring_info; |
29bd8a78 | 5027 | |
aa17911e | 5028 | trace_kvm_exit(exit_reason, vcpu, KVM_ISA_VMX); |
2714d1d3 | 5029 | |
80ced186 MG |
5030 | /* If guest state is invalid, start emulating */ |
5031 | if (vmx->emulation_required && emulate_invalid_guest_state) | |
5032 | return handle_invalid_guest_state(vcpu); | |
1d5a4d9b | 5033 | |
5120702e MG |
5034 | if (exit_reason & VMX_EXIT_REASONS_FAILED_VMENTRY) { |
5035 | vcpu->run->exit_reason = KVM_EXIT_FAIL_ENTRY; | |
5036 | vcpu->run->fail_entry.hardware_entry_failure_reason | |
5037 | = exit_reason; | |
5038 | return 0; | |
5039 | } | |
5040 | ||
29bd8a78 | 5041 | if (unlikely(vmx->fail)) { |
851ba692 AK |
5042 | vcpu->run->exit_reason = KVM_EXIT_FAIL_ENTRY; |
5043 | vcpu->run->fail_entry.hardware_entry_failure_reason | |
29bd8a78 AK |
5044 | = vmcs_read32(VM_INSTRUCTION_ERROR); |
5045 | return 0; | |
5046 | } | |
6aa8b732 | 5047 | |
d77c26fc | 5048 | if ((vectoring_info & VECTORING_INFO_VALID_MASK) && |
1439442c | 5049 | (exit_reason != EXIT_REASON_EXCEPTION_NMI && |
60637aac JK |
5050 | exit_reason != EXIT_REASON_EPT_VIOLATION && |
5051 | exit_reason != EXIT_REASON_TASK_SWITCH)) | |
5052 | printk(KERN_WARNING "%s: unexpected, valid vectoring info " | |
5053 | "(0x%x) and exit reason is 0x%x\n", | |
5054 | __func__, vectoring_info, exit_reason); | |
3b86cd99 JK |
5055 | |
5056 | if (unlikely(!cpu_has_virtual_nmis() && vmx->soft_vnmi_blocked)) { | |
c4282df9 | 5057 | if (vmx_interrupt_allowed(vcpu)) { |
3b86cd99 | 5058 | vmx->soft_vnmi_blocked = 0; |
3b86cd99 | 5059 | } else if (vmx->vnmi_blocked_time > 1000000000LL && |
4531220b | 5060 | vcpu->arch.nmi_pending) { |
3b86cd99 JK |
5061 | /* |
5062 | * This CPU don't support us in finding the end of an | |
5063 | * NMI-blocked window if the guest runs with IRQs | |
5064 | * disabled. So we pull the trigger after 1 s of | |
5065 | * futile waiting, but inform the user about this. | |
5066 | */ | |
5067 | printk(KERN_WARNING "%s: Breaking out of NMI-blocked " | |
5068 | "state on VCPU %d after 1 s timeout\n", | |
5069 | __func__, vcpu->vcpu_id); | |
5070 | vmx->soft_vnmi_blocked = 0; | |
3b86cd99 | 5071 | } |
3b86cd99 JK |
5072 | } |
5073 | ||
6aa8b732 AK |
5074 | if (exit_reason < kvm_vmx_max_exit_handlers |
5075 | && kvm_vmx_exit_handlers[exit_reason]) | |
851ba692 | 5076 | return kvm_vmx_exit_handlers[exit_reason](vcpu); |
6aa8b732 | 5077 | else { |
851ba692 AK |
5078 | vcpu->run->exit_reason = KVM_EXIT_UNKNOWN; |
5079 | vcpu->run->hw.hardware_exit_reason = exit_reason; | |
6aa8b732 AK |
5080 | } |
5081 | return 0; | |
5082 | } | |
5083 | ||
95ba8273 | 5084 | static void update_cr8_intercept(struct kvm_vcpu *vcpu, int tpr, int irr) |
6e5d865c | 5085 | { |
95ba8273 | 5086 | if (irr == -1 || tpr < irr) { |
6e5d865c YS |
5087 | vmcs_write32(TPR_THRESHOLD, 0); |
5088 | return; | |
5089 | } | |
5090 | ||
95ba8273 | 5091 | vmcs_write32(TPR_THRESHOLD, irr); |
6e5d865c YS |
5092 | } |
5093 | ||
51aa01d1 | 5094 | static void vmx_complete_atomic_exit(struct vcpu_vmx *vmx) |
cf393f75 | 5095 | { |
00eba012 AK |
5096 | u32 exit_intr_info; |
5097 | ||
5098 | if (!(vmx->exit_reason == EXIT_REASON_MCE_DURING_VMENTRY | |
5099 | || vmx->exit_reason == EXIT_REASON_EXCEPTION_NMI)) | |
5100 | return; | |
5101 | ||
c5ca8e57 | 5102 | vmx->exit_intr_info = vmcs_read32(VM_EXIT_INTR_INFO); |
00eba012 | 5103 | exit_intr_info = vmx->exit_intr_info; |
a0861c02 AK |
5104 | |
5105 | /* Handle machine checks before interrupts are enabled */ | |
00eba012 | 5106 | if (is_machine_check(exit_intr_info)) |
a0861c02 AK |
5107 | kvm_machine_check(); |
5108 | ||
20f65983 | 5109 | /* We need to handle NMIs before interrupts are enabled */ |
00eba012 | 5110 | if ((exit_intr_info & INTR_INFO_INTR_TYPE_MASK) == INTR_TYPE_NMI_INTR && |
ff9d07a0 ZY |
5111 | (exit_intr_info & INTR_INFO_VALID_MASK)) { |
5112 | kvm_before_handle_nmi(&vmx->vcpu); | |
20f65983 | 5113 | asm("int $2"); |
ff9d07a0 ZY |
5114 | kvm_after_handle_nmi(&vmx->vcpu); |
5115 | } | |
51aa01d1 | 5116 | } |
20f65983 | 5117 | |
51aa01d1 AK |
5118 | static void vmx_recover_nmi_blocking(struct vcpu_vmx *vmx) |
5119 | { | |
c5ca8e57 | 5120 | u32 exit_intr_info; |
51aa01d1 AK |
5121 | bool unblock_nmi; |
5122 | u8 vector; | |
5123 | bool idtv_info_valid; | |
5124 | ||
5125 | idtv_info_valid = vmx->idt_vectoring_info & VECTORING_INFO_VALID_MASK; | |
20f65983 | 5126 | |
cf393f75 | 5127 | if (cpu_has_virtual_nmis()) { |
9d58b931 AK |
5128 | if (vmx->nmi_known_unmasked) |
5129 | return; | |
c5ca8e57 AK |
5130 | /* |
5131 | * Can't use vmx->exit_intr_info since we're not sure what | |
5132 | * the exit reason is. | |
5133 | */ | |
5134 | exit_intr_info = vmcs_read32(VM_EXIT_INTR_INFO); | |
cf393f75 AK |
5135 | unblock_nmi = (exit_intr_info & INTR_INFO_UNBLOCK_NMI) != 0; |
5136 | vector = exit_intr_info & INTR_INFO_VECTOR_MASK; | |
5137 | /* | |
7b4a25cb | 5138 | * SDM 3: 27.7.1.2 (September 2008) |
cf393f75 AK |
5139 | * Re-set bit "block by NMI" before VM entry if vmexit caused by |
5140 | * a guest IRET fault. | |
7b4a25cb GN |
5141 | * SDM 3: 23.2.2 (September 2008) |
5142 | * Bit 12 is undefined in any of the following cases: | |
5143 | * If the VM exit sets the valid bit in the IDT-vectoring | |
5144 | * information field. | |
5145 | * If the VM exit is due to a double fault. | |
cf393f75 | 5146 | */ |
7b4a25cb GN |
5147 | if ((exit_intr_info & INTR_INFO_VALID_MASK) && unblock_nmi && |
5148 | vector != DF_VECTOR && !idtv_info_valid) | |
cf393f75 AK |
5149 | vmcs_set_bits(GUEST_INTERRUPTIBILITY_INFO, |
5150 | GUEST_INTR_STATE_NMI); | |
9d58b931 AK |
5151 | else |
5152 | vmx->nmi_known_unmasked = | |
5153 | !(vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) | |
5154 | & GUEST_INTR_STATE_NMI); | |
3b86cd99 JK |
5155 | } else if (unlikely(vmx->soft_vnmi_blocked)) |
5156 | vmx->vnmi_blocked_time += | |
5157 | ktime_to_ns(ktime_sub(ktime_get(), vmx->entry_time)); | |
51aa01d1 AK |
5158 | } |
5159 | ||
83422e17 AK |
5160 | static void __vmx_complete_interrupts(struct vcpu_vmx *vmx, |
5161 | u32 idt_vectoring_info, | |
5162 | int instr_len_field, | |
5163 | int error_code_field) | |
51aa01d1 | 5164 | { |
51aa01d1 AK |
5165 | u8 vector; |
5166 | int type; | |
5167 | bool idtv_info_valid; | |
5168 | ||
5169 | idtv_info_valid = idt_vectoring_info & VECTORING_INFO_VALID_MASK; | |
668f612f | 5170 | |
37b96e98 GN |
5171 | vmx->vcpu.arch.nmi_injected = false; |
5172 | kvm_clear_exception_queue(&vmx->vcpu); | |
5173 | kvm_clear_interrupt_queue(&vmx->vcpu); | |
5174 | ||
5175 | if (!idtv_info_valid) | |
5176 | return; | |
5177 | ||
3842d135 AK |
5178 | kvm_make_request(KVM_REQ_EVENT, &vmx->vcpu); |
5179 | ||
668f612f AK |
5180 | vector = idt_vectoring_info & VECTORING_INFO_VECTOR_MASK; |
5181 | type = idt_vectoring_info & VECTORING_INFO_TYPE_MASK; | |
37b96e98 | 5182 | |
64a7ec06 | 5183 | switch (type) { |
37b96e98 GN |
5184 | case INTR_TYPE_NMI_INTR: |
5185 | vmx->vcpu.arch.nmi_injected = true; | |
668f612f | 5186 | /* |
7b4a25cb | 5187 | * SDM 3: 27.7.1.2 (September 2008) |
37b96e98 GN |
5188 | * Clear bit "block by NMI" before VM entry if a NMI |
5189 | * delivery faulted. | |
668f612f | 5190 | */ |
654f06fc | 5191 | vmx_set_nmi_mask(&vmx->vcpu, false); |
37b96e98 | 5192 | break; |
37b96e98 | 5193 | case INTR_TYPE_SOFT_EXCEPTION: |
66fd3f7f | 5194 | vmx->vcpu.arch.event_exit_inst_len = |
83422e17 | 5195 | vmcs_read32(instr_len_field); |
66fd3f7f GN |
5196 | /* fall through */ |
5197 | case INTR_TYPE_HARD_EXCEPTION: | |
35920a35 | 5198 | if (idt_vectoring_info & VECTORING_INFO_DELIVER_CODE_MASK) { |
83422e17 | 5199 | u32 err = vmcs_read32(error_code_field); |
37b96e98 | 5200 | kvm_queue_exception_e(&vmx->vcpu, vector, err); |
35920a35 AK |
5201 | } else |
5202 | kvm_queue_exception(&vmx->vcpu, vector); | |
37b96e98 | 5203 | break; |
66fd3f7f GN |
5204 | case INTR_TYPE_SOFT_INTR: |
5205 | vmx->vcpu.arch.event_exit_inst_len = | |
83422e17 | 5206 | vmcs_read32(instr_len_field); |
66fd3f7f | 5207 | /* fall through */ |
37b96e98 | 5208 | case INTR_TYPE_EXT_INTR: |
66fd3f7f GN |
5209 | kvm_queue_interrupt(&vmx->vcpu, vector, |
5210 | type == INTR_TYPE_SOFT_INTR); | |
37b96e98 GN |
5211 | break; |
5212 | default: | |
5213 | break; | |
f7d9238f | 5214 | } |
cf393f75 AK |
5215 | } |
5216 | ||
83422e17 AK |
5217 | static void vmx_complete_interrupts(struct vcpu_vmx *vmx) |
5218 | { | |
5219 | __vmx_complete_interrupts(vmx, vmx->idt_vectoring_info, | |
5220 | VM_EXIT_INSTRUCTION_LEN, | |
5221 | IDT_VECTORING_ERROR_CODE); | |
5222 | } | |
5223 | ||
b463a6f7 AK |
5224 | static void vmx_cancel_injection(struct kvm_vcpu *vcpu) |
5225 | { | |
5226 | __vmx_complete_interrupts(to_vmx(vcpu), | |
5227 | vmcs_read32(VM_ENTRY_INTR_INFO_FIELD), | |
5228 | VM_ENTRY_INSTRUCTION_LEN, | |
5229 | VM_ENTRY_EXCEPTION_ERROR_CODE); | |
5230 | ||
5231 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, 0); | |
5232 | } | |
5233 | ||
c801949d AK |
5234 | #ifdef CONFIG_X86_64 |
5235 | #define R "r" | |
5236 | #define Q "q" | |
5237 | #else | |
5238 | #define R "e" | |
5239 | #define Q "l" | |
5240 | #endif | |
5241 | ||
a3b5ba49 | 5242 | static void __noclone vmx_vcpu_run(struct kvm_vcpu *vcpu) |
6aa8b732 | 5243 | { |
a2fa3e9f | 5244 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
104f226b AK |
5245 | |
5246 | /* Record the guest's net vcpu time for enforced NMI injections. */ | |
5247 | if (unlikely(!cpu_has_virtual_nmis() && vmx->soft_vnmi_blocked)) | |
5248 | vmx->entry_time = ktime_get(); | |
5249 | ||
5250 | /* Don't enter VMX if guest state is invalid, let the exit handler | |
5251 | start emulation until we arrive back to a valid state */ | |
5252 | if (vmx->emulation_required && emulate_invalid_guest_state) | |
5253 | return; | |
5254 | ||
5255 | if (test_bit(VCPU_REGS_RSP, (unsigned long *)&vcpu->arch.regs_dirty)) | |
5256 | vmcs_writel(GUEST_RSP, vcpu->arch.regs[VCPU_REGS_RSP]); | |
5257 | if (test_bit(VCPU_REGS_RIP, (unsigned long *)&vcpu->arch.regs_dirty)) | |
5258 | vmcs_writel(GUEST_RIP, vcpu->arch.regs[VCPU_REGS_RIP]); | |
5259 | ||
5260 | /* When single-stepping over STI and MOV SS, we must clear the | |
5261 | * corresponding interruptibility bits in the guest state. Otherwise | |
5262 | * vmentry fails as it then expects bit 14 (BS) in pending debug | |
5263 | * exceptions being set, but that's not correct for the guest debugging | |
5264 | * case. */ | |
5265 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) | |
5266 | vmx_set_interrupt_shadow(vcpu, 0); | |
5267 | ||
d462b819 | 5268 | vmx->__launched = vmx->loaded_vmcs->launched; |
104f226b | 5269 | asm( |
6aa8b732 | 5270 | /* Store host registers */ |
c801949d | 5271 | "push %%"R"dx; push %%"R"bp;" |
40712fae | 5272 | "push %%"R"cx \n\t" /* placeholder for guest rcx */ |
c801949d | 5273 | "push %%"R"cx \n\t" |
313dbd49 AK |
5274 | "cmp %%"R"sp, %c[host_rsp](%0) \n\t" |
5275 | "je 1f \n\t" | |
5276 | "mov %%"R"sp, %c[host_rsp](%0) \n\t" | |
4ecac3fd | 5277 | __ex(ASM_VMX_VMWRITE_RSP_RDX) "\n\t" |
313dbd49 | 5278 | "1: \n\t" |
d3edefc0 AK |
5279 | /* Reload cr2 if changed */ |
5280 | "mov %c[cr2](%0), %%"R"ax \n\t" | |
5281 | "mov %%cr2, %%"R"dx \n\t" | |
5282 | "cmp %%"R"ax, %%"R"dx \n\t" | |
5283 | "je 2f \n\t" | |
5284 | "mov %%"R"ax, %%cr2 \n\t" | |
5285 | "2: \n\t" | |
6aa8b732 | 5286 | /* Check if vmlaunch of vmresume is needed */ |
e08aa78a | 5287 | "cmpl $0, %c[launched](%0) \n\t" |
6aa8b732 | 5288 | /* Load guest registers. Don't clobber flags. */ |
c801949d AK |
5289 | "mov %c[rax](%0), %%"R"ax \n\t" |
5290 | "mov %c[rbx](%0), %%"R"bx \n\t" | |
5291 | "mov %c[rdx](%0), %%"R"dx \n\t" | |
5292 | "mov %c[rsi](%0), %%"R"si \n\t" | |
5293 | "mov %c[rdi](%0), %%"R"di \n\t" | |
5294 | "mov %c[rbp](%0), %%"R"bp \n\t" | |
05b3e0c2 | 5295 | #ifdef CONFIG_X86_64 |
e08aa78a AK |
5296 | "mov %c[r8](%0), %%r8 \n\t" |
5297 | "mov %c[r9](%0), %%r9 \n\t" | |
5298 | "mov %c[r10](%0), %%r10 \n\t" | |
5299 | "mov %c[r11](%0), %%r11 \n\t" | |
5300 | "mov %c[r12](%0), %%r12 \n\t" | |
5301 | "mov %c[r13](%0), %%r13 \n\t" | |
5302 | "mov %c[r14](%0), %%r14 \n\t" | |
5303 | "mov %c[r15](%0), %%r15 \n\t" | |
6aa8b732 | 5304 | #endif |
c801949d AK |
5305 | "mov %c[rcx](%0), %%"R"cx \n\t" /* kills %0 (ecx) */ |
5306 | ||
6aa8b732 | 5307 | /* Enter guest mode */ |
cd2276a7 | 5308 | "jne .Llaunched \n\t" |
4ecac3fd | 5309 | __ex(ASM_VMX_VMLAUNCH) "\n\t" |
cd2276a7 | 5310 | "jmp .Lkvm_vmx_return \n\t" |
4ecac3fd | 5311 | ".Llaunched: " __ex(ASM_VMX_VMRESUME) "\n\t" |
cd2276a7 | 5312 | ".Lkvm_vmx_return: " |
6aa8b732 | 5313 | /* Save guest registers, load host registers, keep flags */ |
40712fae AK |
5314 | "mov %0, %c[wordsize](%%"R"sp) \n\t" |
5315 | "pop %0 \n\t" | |
c801949d AK |
5316 | "mov %%"R"ax, %c[rax](%0) \n\t" |
5317 | "mov %%"R"bx, %c[rbx](%0) \n\t" | |
1c696d0e | 5318 | "pop"Q" %c[rcx](%0) \n\t" |
c801949d AK |
5319 | "mov %%"R"dx, %c[rdx](%0) \n\t" |
5320 | "mov %%"R"si, %c[rsi](%0) \n\t" | |
5321 | "mov %%"R"di, %c[rdi](%0) \n\t" | |
5322 | "mov %%"R"bp, %c[rbp](%0) \n\t" | |
05b3e0c2 | 5323 | #ifdef CONFIG_X86_64 |
e08aa78a AK |
5324 | "mov %%r8, %c[r8](%0) \n\t" |
5325 | "mov %%r9, %c[r9](%0) \n\t" | |
5326 | "mov %%r10, %c[r10](%0) \n\t" | |
5327 | "mov %%r11, %c[r11](%0) \n\t" | |
5328 | "mov %%r12, %c[r12](%0) \n\t" | |
5329 | "mov %%r13, %c[r13](%0) \n\t" | |
5330 | "mov %%r14, %c[r14](%0) \n\t" | |
5331 | "mov %%r15, %c[r15](%0) \n\t" | |
6aa8b732 | 5332 | #endif |
c801949d AK |
5333 | "mov %%cr2, %%"R"ax \n\t" |
5334 | "mov %%"R"ax, %c[cr2](%0) \n\t" | |
5335 | ||
1c696d0e | 5336 | "pop %%"R"bp; pop %%"R"dx \n\t" |
e08aa78a AK |
5337 | "setbe %c[fail](%0) \n\t" |
5338 | : : "c"(vmx), "d"((unsigned long)HOST_RSP), | |
d462b819 | 5339 | [launched]"i"(offsetof(struct vcpu_vmx, __launched)), |
e08aa78a | 5340 | [fail]"i"(offsetof(struct vcpu_vmx, fail)), |
313dbd49 | 5341 | [host_rsp]"i"(offsetof(struct vcpu_vmx, host_rsp)), |
ad312c7c ZX |
5342 | [rax]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RAX])), |
5343 | [rbx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RBX])), | |
5344 | [rcx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RCX])), | |
5345 | [rdx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RDX])), | |
5346 | [rsi]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RSI])), | |
5347 | [rdi]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RDI])), | |
5348 | [rbp]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RBP])), | |
05b3e0c2 | 5349 | #ifdef CONFIG_X86_64 |
ad312c7c ZX |
5350 | [r8]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R8])), |
5351 | [r9]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R9])), | |
5352 | [r10]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R10])), | |
5353 | [r11]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R11])), | |
5354 | [r12]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R12])), | |
5355 | [r13]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R13])), | |
5356 | [r14]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R14])), | |
5357 | [r15]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R15])), | |
6aa8b732 | 5358 | #endif |
40712fae AK |
5359 | [cr2]"i"(offsetof(struct vcpu_vmx, vcpu.arch.cr2)), |
5360 | [wordsize]"i"(sizeof(ulong)) | |
c2036300 | 5361 | : "cc", "memory" |
07d6f555 | 5362 | , R"ax", R"bx", R"di", R"si" |
c2036300 | 5363 | #ifdef CONFIG_X86_64 |
c2036300 LV |
5364 | , "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15" |
5365 | #endif | |
5366 | ); | |
6aa8b732 | 5367 | |
6de4f3ad | 5368 | vcpu->arch.regs_avail = ~((1 << VCPU_REGS_RIP) | (1 << VCPU_REGS_RSP) |
6de12732 | 5369 | | (1 << VCPU_EXREG_RFLAGS) |
69c73028 | 5370 | | (1 << VCPU_EXREG_CPL) |
aff48baa | 5371 | | (1 << VCPU_EXREG_PDPTR) |
2fb92db1 | 5372 | | (1 << VCPU_EXREG_SEGMENTS) |
aff48baa | 5373 | | (1 << VCPU_EXREG_CR3)); |
5fdbf976 MT |
5374 | vcpu->arch.regs_dirty = 0; |
5375 | ||
1155f76a AK |
5376 | vmx->idt_vectoring_info = vmcs_read32(IDT_VECTORING_INFO_FIELD); |
5377 | ||
d77c26fc | 5378 | asm("mov %0, %%ds; mov %0, %%es" : : "r"(__USER_DS)); |
d462b819 | 5379 | vmx->loaded_vmcs->launched = 1; |
1b6269db | 5380 | |
51aa01d1 | 5381 | vmx->exit_reason = vmcs_read32(VM_EXIT_REASON); |
51aa01d1 AK |
5382 | |
5383 | vmx_complete_atomic_exit(vmx); | |
5384 | vmx_recover_nmi_blocking(vmx); | |
cf393f75 | 5385 | vmx_complete_interrupts(vmx); |
6aa8b732 AK |
5386 | } |
5387 | ||
c801949d AK |
5388 | #undef R |
5389 | #undef Q | |
5390 | ||
6aa8b732 AK |
5391 | static void vmx_free_vcpu(struct kvm_vcpu *vcpu) |
5392 | { | |
fb3f0f51 RR |
5393 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
5394 | ||
cdbecfc3 | 5395 | free_vpid(vmx); |
ec378aee | 5396 | free_nested(vmx); |
d462b819 | 5397 | free_loaded_vmcs(vmx->loaded_vmcs); |
fb3f0f51 RR |
5398 | kfree(vmx->guest_msrs); |
5399 | kvm_vcpu_uninit(vcpu); | |
a4770347 | 5400 | kmem_cache_free(kvm_vcpu_cache, vmx); |
6aa8b732 AK |
5401 | } |
5402 | ||
fb3f0f51 | 5403 | static struct kvm_vcpu *vmx_create_vcpu(struct kvm *kvm, unsigned int id) |
6aa8b732 | 5404 | { |
fb3f0f51 | 5405 | int err; |
c16f862d | 5406 | struct vcpu_vmx *vmx = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); |
15ad7146 | 5407 | int cpu; |
6aa8b732 | 5408 | |
a2fa3e9f | 5409 | if (!vmx) |
fb3f0f51 RR |
5410 | return ERR_PTR(-ENOMEM); |
5411 | ||
2384d2b3 SY |
5412 | allocate_vpid(vmx); |
5413 | ||
fb3f0f51 RR |
5414 | err = kvm_vcpu_init(&vmx->vcpu, kvm, id); |
5415 | if (err) | |
5416 | goto free_vcpu; | |
965b58a5 | 5417 | |
a2fa3e9f | 5418 | vmx->guest_msrs = kmalloc(PAGE_SIZE, GFP_KERNEL); |
be6d05cf | 5419 | err = -ENOMEM; |
fb3f0f51 | 5420 | if (!vmx->guest_msrs) { |
fb3f0f51 RR |
5421 | goto uninit_vcpu; |
5422 | } | |
965b58a5 | 5423 | |
d462b819 NHE |
5424 | vmx->loaded_vmcs = &vmx->vmcs01; |
5425 | vmx->loaded_vmcs->vmcs = alloc_vmcs(); | |
5426 | if (!vmx->loaded_vmcs->vmcs) | |
fb3f0f51 | 5427 | goto free_msrs; |
d462b819 NHE |
5428 | if (!vmm_exclusive) |
5429 | kvm_cpu_vmxon(__pa(per_cpu(vmxarea, raw_smp_processor_id()))); | |
5430 | loaded_vmcs_init(vmx->loaded_vmcs); | |
5431 | if (!vmm_exclusive) | |
5432 | kvm_cpu_vmxoff(); | |
a2fa3e9f | 5433 | |
15ad7146 AK |
5434 | cpu = get_cpu(); |
5435 | vmx_vcpu_load(&vmx->vcpu, cpu); | |
e48672fa | 5436 | vmx->vcpu.cpu = cpu; |
8b9cf98c | 5437 | err = vmx_vcpu_setup(vmx); |
fb3f0f51 | 5438 | vmx_vcpu_put(&vmx->vcpu); |
15ad7146 | 5439 | put_cpu(); |
fb3f0f51 RR |
5440 | if (err) |
5441 | goto free_vmcs; | |
5e4a0b3c | 5442 | if (vm_need_virtualize_apic_accesses(kvm)) |
be6d05cf JK |
5443 | err = alloc_apic_access_page(kvm); |
5444 | if (err) | |
5e4a0b3c | 5445 | goto free_vmcs; |
fb3f0f51 | 5446 | |
b927a3ce SY |
5447 | if (enable_ept) { |
5448 | if (!kvm->arch.ept_identity_map_addr) | |
5449 | kvm->arch.ept_identity_map_addr = | |
5450 | VMX_EPT_IDENTITY_PAGETABLE_ADDR; | |
93ea5388 | 5451 | err = -ENOMEM; |
b7ebfb05 SY |
5452 | if (alloc_identity_pagetable(kvm) != 0) |
5453 | goto free_vmcs; | |
93ea5388 GN |
5454 | if (!init_rmode_identity_map(kvm)) |
5455 | goto free_vmcs; | |
b927a3ce | 5456 | } |
b7ebfb05 | 5457 | |
a9d30f33 NHE |
5458 | vmx->nested.current_vmptr = -1ull; |
5459 | vmx->nested.current_vmcs12 = NULL; | |
5460 | ||
fb3f0f51 RR |
5461 | return &vmx->vcpu; |
5462 | ||
5463 | free_vmcs: | |
d462b819 | 5464 | free_vmcs(vmx->loaded_vmcs->vmcs); |
fb3f0f51 | 5465 | free_msrs: |
fb3f0f51 RR |
5466 | kfree(vmx->guest_msrs); |
5467 | uninit_vcpu: | |
5468 | kvm_vcpu_uninit(&vmx->vcpu); | |
5469 | free_vcpu: | |
cdbecfc3 | 5470 | free_vpid(vmx); |
a4770347 | 5471 | kmem_cache_free(kvm_vcpu_cache, vmx); |
fb3f0f51 | 5472 | return ERR_PTR(err); |
6aa8b732 AK |
5473 | } |
5474 | ||
002c7f7c YS |
5475 | static void __init vmx_check_processor_compat(void *rtn) |
5476 | { | |
5477 | struct vmcs_config vmcs_conf; | |
5478 | ||
5479 | *(int *)rtn = 0; | |
5480 | if (setup_vmcs_config(&vmcs_conf) < 0) | |
5481 | *(int *)rtn = -EIO; | |
5482 | if (memcmp(&vmcs_config, &vmcs_conf, sizeof(struct vmcs_config)) != 0) { | |
5483 | printk(KERN_ERR "kvm: CPU %d feature inconsistency!\n", | |
5484 | smp_processor_id()); | |
5485 | *(int *)rtn = -EIO; | |
5486 | } | |
5487 | } | |
5488 | ||
67253af5 SY |
5489 | static int get_ept_level(void) |
5490 | { | |
5491 | return VMX_EPT_DEFAULT_GAW + 1; | |
5492 | } | |
5493 | ||
4b12f0de | 5494 | static u64 vmx_get_mt_mask(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio) |
64d4d521 | 5495 | { |
4b12f0de SY |
5496 | u64 ret; |
5497 | ||
522c68c4 SY |
5498 | /* For VT-d and EPT combination |
5499 | * 1. MMIO: always map as UC | |
5500 | * 2. EPT with VT-d: | |
5501 | * a. VT-d without snooping control feature: can't guarantee the | |
5502 | * result, try to trust guest. | |
5503 | * b. VT-d with snooping control feature: snooping control feature of | |
5504 | * VT-d engine can guarantee the cache correctness. Just set it | |
5505 | * to WB to keep consistent with host. So the same as item 3. | |
a19a6d11 | 5506 | * 3. EPT without VT-d: always map as WB and set IPAT=1 to keep |
522c68c4 SY |
5507 | * consistent with host MTRR |
5508 | */ | |
4b12f0de SY |
5509 | if (is_mmio) |
5510 | ret = MTRR_TYPE_UNCACHABLE << VMX_EPT_MT_EPTE_SHIFT; | |
522c68c4 SY |
5511 | else if (vcpu->kvm->arch.iommu_domain && |
5512 | !(vcpu->kvm->arch.iommu_flags & KVM_IOMMU_CACHE_COHERENCY)) | |
5513 | ret = kvm_get_guest_memory_type(vcpu, gfn) << | |
5514 | VMX_EPT_MT_EPTE_SHIFT; | |
4b12f0de | 5515 | else |
522c68c4 | 5516 | ret = (MTRR_TYPE_WRBACK << VMX_EPT_MT_EPTE_SHIFT) |
a19a6d11 | 5517 | | VMX_EPT_IPAT_BIT; |
4b12f0de SY |
5518 | |
5519 | return ret; | |
64d4d521 SY |
5520 | } |
5521 | ||
f4c9e87c AK |
5522 | #define _ER(x) { EXIT_REASON_##x, #x } |
5523 | ||
229456fc | 5524 | static const struct trace_print_flags vmx_exit_reasons_str[] = { |
f4c9e87c AK |
5525 | _ER(EXCEPTION_NMI), |
5526 | _ER(EXTERNAL_INTERRUPT), | |
5527 | _ER(TRIPLE_FAULT), | |
5528 | _ER(PENDING_INTERRUPT), | |
5529 | _ER(NMI_WINDOW), | |
5530 | _ER(TASK_SWITCH), | |
5531 | _ER(CPUID), | |
5532 | _ER(HLT), | |
5533 | _ER(INVLPG), | |
5534 | _ER(RDPMC), | |
5535 | _ER(RDTSC), | |
5536 | _ER(VMCALL), | |
5537 | _ER(VMCLEAR), | |
5538 | _ER(VMLAUNCH), | |
5539 | _ER(VMPTRLD), | |
5540 | _ER(VMPTRST), | |
5541 | _ER(VMREAD), | |
5542 | _ER(VMRESUME), | |
5543 | _ER(VMWRITE), | |
5544 | _ER(VMOFF), | |
5545 | _ER(VMON), | |
5546 | _ER(CR_ACCESS), | |
5547 | _ER(DR_ACCESS), | |
5548 | _ER(IO_INSTRUCTION), | |
5549 | _ER(MSR_READ), | |
5550 | _ER(MSR_WRITE), | |
5551 | _ER(MWAIT_INSTRUCTION), | |
5552 | _ER(MONITOR_INSTRUCTION), | |
5553 | _ER(PAUSE_INSTRUCTION), | |
5554 | _ER(MCE_DURING_VMENTRY), | |
5555 | _ER(TPR_BELOW_THRESHOLD), | |
5556 | _ER(APIC_ACCESS), | |
5557 | _ER(EPT_VIOLATION), | |
5558 | _ER(EPT_MISCONFIG), | |
5559 | _ER(WBINVD), | |
229456fc MT |
5560 | { -1, NULL } |
5561 | }; | |
5562 | ||
f4c9e87c AK |
5563 | #undef _ER |
5564 | ||
17cc3935 | 5565 | static int vmx_get_lpage_level(void) |
344f414f | 5566 | { |
878403b7 SY |
5567 | if (enable_ept && !cpu_has_vmx_ept_1g_page()) |
5568 | return PT_DIRECTORY_LEVEL; | |
5569 | else | |
5570 | /* For shadow and EPT supported 1GB page */ | |
5571 | return PT_PDPE_LEVEL; | |
344f414f JR |
5572 | } |
5573 | ||
0e851880 SY |
5574 | static void vmx_cpuid_update(struct kvm_vcpu *vcpu) |
5575 | { | |
4e47c7a6 SY |
5576 | struct kvm_cpuid_entry2 *best; |
5577 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
5578 | u32 exec_control; | |
5579 | ||
5580 | vmx->rdtscp_enabled = false; | |
5581 | if (vmx_rdtscp_supported()) { | |
5582 | exec_control = vmcs_read32(SECONDARY_VM_EXEC_CONTROL); | |
5583 | if (exec_control & SECONDARY_EXEC_RDTSCP) { | |
5584 | best = kvm_find_cpuid_entry(vcpu, 0x80000001, 0); | |
5585 | if (best && (best->edx & bit(X86_FEATURE_RDTSCP))) | |
5586 | vmx->rdtscp_enabled = true; | |
5587 | else { | |
5588 | exec_control &= ~SECONDARY_EXEC_RDTSCP; | |
5589 | vmcs_write32(SECONDARY_VM_EXEC_CONTROL, | |
5590 | exec_control); | |
5591 | } | |
5592 | } | |
5593 | } | |
0e851880 SY |
5594 | } |
5595 | ||
d4330ef2 JR |
5596 | static void vmx_set_supported_cpuid(u32 func, struct kvm_cpuid_entry2 *entry) |
5597 | { | |
5598 | } | |
5599 | ||
8a76d7f2 JR |
5600 | static int vmx_check_intercept(struct kvm_vcpu *vcpu, |
5601 | struct x86_instruction_info *info, | |
5602 | enum x86_intercept_stage stage) | |
5603 | { | |
5604 | return X86EMUL_CONTINUE; | |
5605 | } | |
5606 | ||
cbdd1bea | 5607 | static struct kvm_x86_ops vmx_x86_ops = { |
6aa8b732 AK |
5608 | .cpu_has_kvm_support = cpu_has_kvm_support, |
5609 | .disabled_by_bios = vmx_disabled_by_bios, | |
5610 | .hardware_setup = hardware_setup, | |
5611 | .hardware_unsetup = hardware_unsetup, | |
002c7f7c | 5612 | .check_processor_compatibility = vmx_check_processor_compat, |
6aa8b732 AK |
5613 | .hardware_enable = hardware_enable, |
5614 | .hardware_disable = hardware_disable, | |
04547156 | 5615 | .cpu_has_accelerated_tpr = report_flexpriority, |
6aa8b732 AK |
5616 | |
5617 | .vcpu_create = vmx_create_vcpu, | |
5618 | .vcpu_free = vmx_free_vcpu, | |
04d2cc77 | 5619 | .vcpu_reset = vmx_vcpu_reset, |
6aa8b732 | 5620 | |
04d2cc77 | 5621 | .prepare_guest_switch = vmx_save_host_state, |
6aa8b732 AK |
5622 | .vcpu_load = vmx_vcpu_load, |
5623 | .vcpu_put = vmx_vcpu_put, | |
5624 | ||
5625 | .set_guest_debug = set_guest_debug, | |
5626 | .get_msr = vmx_get_msr, | |
5627 | .set_msr = vmx_set_msr, | |
5628 | .get_segment_base = vmx_get_segment_base, | |
5629 | .get_segment = vmx_get_segment, | |
5630 | .set_segment = vmx_set_segment, | |
2e4d2653 | 5631 | .get_cpl = vmx_get_cpl, |
6aa8b732 | 5632 | .get_cs_db_l_bits = vmx_get_cs_db_l_bits, |
e8467fda | 5633 | .decache_cr0_guest_bits = vmx_decache_cr0_guest_bits, |
aff48baa | 5634 | .decache_cr3 = vmx_decache_cr3, |
25c4c276 | 5635 | .decache_cr4_guest_bits = vmx_decache_cr4_guest_bits, |
6aa8b732 | 5636 | .set_cr0 = vmx_set_cr0, |
6aa8b732 AK |
5637 | .set_cr3 = vmx_set_cr3, |
5638 | .set_cr4 = vmx_set_cr4, | |
6aa8b732 | 5639 | .set_efer = vmx_set_efer, |
6aa8b732 AK |
5640 | .get_idt = vmx_get_idt, |
5641 | .set_idt = vmx_set_idt, | |
5642 | .get_gdt = vmx_get_gdt, | |
5643 | .set_gdt = vmx_set_gdt, | |
020df079 | 5644 | .set_dr7 = vmx_set_dr7, |
5fdbf976 | 5645 | .cache_reg = vmx_cache_reg, |
6aa8b732 AK |
5646 | .get_rflags = vmx_get_rflags, |
5647 | .set_rflags = vmx_set_rflags, | |
ebcbab4c | 5648 | .fpu_activate = vmx_fpu_activate, |
02daab21 | 5649 | .fpu_deactivate = vmx_fpu_deactivate, |
6aa8b732 AK |
5650 | |
5651 | .tlb_flush = vmx_flush_tlb, | |
6aa8b732 | 5652 | |
6aa8b732 | 5653 | .run = vmx_vcpu_run, |
6062d012 | 5654 | .handle_exit = vmx_handle_exit, |
6aa8b732 | 5655 | .skip_emulated_instruction = skip_emulated_instruction, |
2809f5d2 GC |
5656 | .set_interrupt_shadow = vmx_set_interrupt_shadow, |
5657 | .get_interrupt_shadow = vmx_get_interrupt_shadow, | |
102d8325 | 5658 | .patch_hypercall = vmx_patch_hypercall, |
2a8067f1 | 5659 | .set_irq = vmx_inject_irq, |
95ba8273 | 5660 | .set_nmi = vmx_inject_nmi, |
298101da | 5661 | .queue_exception = vmx_queue_exception, |
b463a6f7 | 5662 | .cancel_injection = vmx_cancel_injection, |
78646121 | 5663 | .interrupt_allowed = vmx_interrupt_allowed, |
95ba8273 | 5664 | .nmi_allowed = vmx_nmi_allowed, |
3cfc3092 JK |
5665 | .get_nmi_mask = vmx_get_nmi_mask, |
5666 | .set_nmi_mask = vmx_set_nmi_mask, | |
95ba8273 GN |
5667 | .enable_nmi_window = enable_nmi_window, |
5668 | .enable_irq_window = enable_irq_window, | |
5669 | .update_cr8_intercept = update_cr8_intercept, | |
95ba8273 | 5670 | |
cbc94022 | 5671 | .set_tss_addr = vmx_set_tss_addr, |
67253af5 | 5672 | .get_tdp_level = get_ept_level, |
4b12f0de | 5673 | .get_mt_mask = vmx_get_mt_mask, |
229456fc | 5674 | |
586f9607 | 5675 | .get_exit_info = vmx_get_exit_info, |
229456fc | 5676 | .exit_reasons_str = vmx_exit_reasons_str, |
586f9607 | 5677 | |
17cc3935 | 5678 | .get_lpage_level = vmx_get_lpage_level, |
0e851880 SY |
5679 | |
5680 | .cpuid_update = vmx_cpuid_update, | |
4e47c7a6 SY |
5681 | |
5682 | .rdtscp_supported = vmx_rdtscp_supported, | |
d4330ef2 JR |
5683 | |
5684 | .set_supported_cpuid = vmx_set_supported_cpuid, | |
f5f48ee1 SY |
5685 | |
5686 | .has_wbinvd_exit = cpu_has_vmx_wbinvd_exit, | |
99e3e30a | 5687 | |
4051b188 | 5688 | .set_tsc_khz = vmx_set_tsc_khz, |
99e3e30a | 5689 | .write_tsc_offset = vmx_write_tsc_offset, |
e48672fa | 5690 | .adjust_tsc_offset = vmx_adjust_tsc_offset, |
857e4099 | 5691 | .compute_tsc_offset = vmx_compute_tsc_offset, |
1c97f0a0 JR |
5692 | |
5693 | .set_tdp_cr3 = vmx_set_cr3, | |
8a76d7f2 JR |
5694 | |
5695 | .check_intercept = vmx_check_intercept, | |
6aa8b732 AK |
5696 | }; |
5697 | ||
5698 | static int __init vmx_init(void) | |
5699 | { | |
26bb0981 AK |
5700 | int r, i; |
5701 | ||
5702 | rdmsrl_safe(MSR_EFER, &host_efer); | |
5703 | ||
5704 | for (i = 0; i < NR_VMX_MSR; ++i) | |
5705 | kvm_define_shared_msr(i, vmx_msr_index[i]); | |
fdef3ad1 | 5706 | |
3e7c73e9 | 5707 | vmx_io_bitmap_a = (unsigned long *)__get_free_page(GFP_KERNEL); |
fdef3ad1 HQ |
5708 | if (!vmx_io_bitmap_a) |
5709 | return -ENOMEM; | |
5710 | ||
3e7c73e9 | 5711 | vmx_io_bitmap_b = (unsigned long *)__get_free_page(GFP_KERNEL); |
fdef3ad1 HQ |
5712 | if (!vmx_io_bitmap_b) { |
5713 | r = -ENOMEM; | |
5714 | goto out; | |
5715 | } | |
5716 | ||
5897297b AK |
5717 | vmx_msr_bitmap_legacy = (unsigned long *)__get_free_page(GFP_KERNEL); |
5718 | if (!vmx_msr_bitmap_legacy) { | |
25c5f225 SY |
5719 | r = -ENOMEM; |
5720 | goto out1; | |
5721 | } | |
5722 | ||
5897297b AK |
5723 | vmx_msr_bitmap_longmode = (unsigned long *)__get_free_page(GFP_KERNEL); |
5724 | if (!vmx_msr_bitmap_longmode) { | |
5725 | r = -ENOMEM; | |
5726 | goto out2; | |
5727 | } | |
5728 | ||
fdef3ad1 HQ |
5729 | /* |
5730 | * Allow direct access to the PC debug port (it is often used for I/O | |
5731 | * delays, but the vmexits simply slow things down). | |
5732 | */ | |
3e7c73e9 AK |
5733 | memset(vmx_io_bitmap_a, 0xff, PAGE_SIZE); |
5734 | clear_bit(0x80, vmx_io_bitmap_a); | |
fdef3ad1 | 5735 | |
3e7c73e9 | 5736 | memset(vmx_io_bitmap_b, 0xff, PAGE_SIZE); |
fdef3ad1 | 5737 | |
5897297b AK |
5738 | memset(vmx_msr_bitmap_legacy, 0xff, PAGE_SIZE); |
5739 | memset(vmx_msr_bitmap_longmode, 0xff, PAGE_SIZE); | |
25c5f225 | 5740 | |
2384d2b3 SY |
5741 | set_bit(0, vmx_vpid_bitmap); /* 0 is reserved for host */ |
5742 | ||
0ee75bea AK |
5743 | r = kvm_init(&vmx_x86_ops, sizeof(struct vcpu_vmx), |
5744 | __alignof__(struct vcpu_vmx), THIS_MODULE); | |
fdef3ad1 | 5745 | if (r) |
5897297b | 5746 | goto out3; |
25c5f225 | 5747 | |
5897297b AK |
5748 | vmx_disable_intercept_for_msr(MSR_FS_BASE, false); |
5749 | vmx_disable_intercept_for_msr(MSR_GS_BASE, false); | |
5750 | vmx_disable_intercept_for_msr(MSR_KERNEL_GS_BASE, true); | |
5751 | vmx_disable_intercept_for_msr(MSR_IA32_SYSENTER_CS, false); | |
5752 | vmx_disable_intercept_for_msr(MSR_IA32_SYSENTER_ESP, false); | |
5753 | vmx_disable_intercept_for_msr(MSR_IA32_SYSENTER_EIP, false); | |
fdef3ad1 | 5754 | |
089d034e | 5755 | if (enable_ept) { |
1439442c | 5756 | bypass_guest_pf = 0; |
534e38b4 | 5757 | kvm_mmu_set_mask_ptes(0ull, 0ull, 0ull, 0ull, |
4b12f0de | 5758 | VMX_EPT_EXECUTABLE_MASK); |
5fdbcb9d SY |
5759 | kvm_enable_tdp(); |
5760 | } else | |
5761 | kvm_disable_tdp(); | |
1439442c | 5762 | |
c7addb90 AK |
5763 | if (bypass_guest_pf) |
5764 | kvm_mmu_set_nonpresent_ptes(~0xffeull, 0ull); | |
5765 | ||
fdef3ad1 HQ |
5766 | return 0; |
5767 | ||
5897297b AK |
5768 | out3: |
5769 | free_page((unsigned long)vmx_msr_bitmap_longmode); | |
25c5f225 | 5770 | out2: |
5897297b | 5771 | free_page((unsigned long)vmx_msr_bitmap_legacy); |
fdef3ad1 | 5772 | out1: |
3e7c73e9 | 5773 | free_page((unsigned long)vmx_io_bitmap_b); |
fdef3ad1 | 5774 | out: |
3e7c73e9 | 5775 | free_page((unsigned long)vmx_io_bitmap_a); |
fdef3ad1 | 5776 | return r; |
6aa8b732 AK |
5777 | } |
5778 | ||
5779 | static void __exit vmx_exit(void) | |
5780 | { | |
5897297b AK |
5781 | free_page((unsigned long)vmx_msr_bitmap_legacy); |
5782 | free_page((unsigned long)vmx_msr_bitmap_longmode); | |
3e7c73e9 AK |
5783 | free_page((unsigned long)vmx_io_bitmap_b); |
5784 | free_page((unsigned long)vmx_io_bitmap_a); | |
fdef3ad1 | 5785 | |
cb498ea2 | 5786 | kvm_exit(); |
6aa8b732 AK |
5787 | } |
5788 | ||
5789 | module_init(vmx_init) | |
5790 | module_exit(vmx_exit) |