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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 AK |
45 | #define __ex(x) __kvm_handle_fault_on_reboot(x) |
46 | ||
6aa8b732 AK |
47 | MODULE_AUTHOR("Qumranet"); |
48 | MODULE_LICENSE("GPL"); | |
49 | ||
4462d21a | 50 | static int __read_mostly bypass_guest_pf = 1; |
c1f8bc04 | 51 | module_param(bypass_guest_pf, bool, S_IRUGO); |
c7addb90 | 52 | |
4462d21a | 53 | static int __read_mostly enable_vpid = 1; |
736caefe | 54 | module_param_named(vpid, enable_vpid, bool, 0444); |
2384d2b3 | 55 | |
4462d21a | 56 | static int __read_mostly flexpriority_enabled = 1; |
736caefe | 57 | module_param_named(flexpriority, flexpriority_enabled, bool, S_IRUGO); |
4c9fc8ef | 58 | |
4462d21a | 59 | static int __read_mostly enable_ept = 1; |
736caefe | 60 | module_param_named(ept, enable_ept, bool, S_IRUGO); |
d56f546d | 61 | |
3a624e29 NK |
62 | static int __read_mostly enable_unrestricted_guest = 1; |
63 | module_param_named(unrestricted_guest, | |
64 | enable_unrestricted_guest, bool, S_IRUGO); | |
65 | ||
4462d21a | 66 | static int __read_mostly emulate_invalid_guest_state = 0; |
c1f8bc04 | 67 | module_param(emulate_invalid_guest_state, bool, S_IRUGO); |
04fa4d32 | 68 | |
b923e62e DX |
69 | static int __read_mostly vmm_exclusive = 1; |
70 | module_param(vmm_exclusive, bool, S_IRUGO); | |
71 | ||
443381a8 AL |
72 | static int __read_mostly yield_on_hlt = 1; |
73 | module_param(yield_on_hlt, bool, S_IRUGO); | |
74 | ||
cdc0e244 AK |
75 | #define KVM_GUEST_CR0_MASK_UNRESTRICTED_GUEST \ |
76 | (X86_CR0_WP | X86_CR0_NE | X86_CR0_NW | X86_CR0_CD) | |
77 | #define KVM_GUEST_CR0_MASK \ | |
78 | (KVM_GUEST_CR0_MASK_UNRESTRICTED_GUEST | X86_CR0_PG | X86_CR0_PE) | |
79 | #define KVM_VM_CR0_ALWAYS_ON_UNRESTRICTED_GUEST \ | |
81231c69 | 80 | (X86_CR0_WP | X86_CR0_NE) |
cdc0e244 AK |
81 | #define KVM_VM_CR0_ALWAYS_ON \ |
82 | (KVM_VM_CR0_ALWAYS_ON_UNRESTRICTED_GUEST | X86_CR0_PG | X86_CR0_PE) | |
4c38609a AK |
83 | #define KVM_CR4_GUEST_OWNED_BITS \ |
84 | (X86_CR4_PVI | X86_CR4_DE | X86_CR4_PCE | X86_CR4_OSFXSR \ | |
85 | | X86_CR4_OSXMMEXCPT) | |
86 | ||
cdc0e244 AK |
87 | #define KVM_PMODE_VM_CR4_ALWAYS_ON (X86_CR4_PAE | X86_CR4_VMXE) |
88 | #define KVM_RMODE_VM_CR4_ALWAYS_ON (X86_CR4_VME | X86_CR4_PAE | X86_CR4_VMXE) | |
89 | ||
78ac8b47 AK |
90 | #define RMODE_GUEST_OWNED_EFLAGS_BITS (~(X86_EFLAGS_IOPL | X86_EFLAGS_VM)) |
91 | ||
4b8d54f9 ZE |
92 | /* |
93 | * These 2 parameters are used to config the controls for Pause-Loop Exiting: | |
94 | * ple_gap: upper bound on the amount of time between two successive | |
95 | * executions of PAUSE in a loop. Also indicate if ple enabled. | |
96 | * According to test, this time is usually small than 41 cycles. | |
97 | * ple_window: upper bound on the amount of time a guest is allowed to execute | |
98 | * in a PAUSE loop. Tests indicate that most spinlocks are held for | |
99 | * less than 2^12 cycles | |
100 | * Time is measured based on a counter that runs at the same rate as the TSC, | |
101 | * refer SDM volume 3b section 21.6.13 & 22.1.3. | |
102 | */ | |
103 | #define KVM_VMX_DEFAULT_PLE_GAP 41 | |
104 | #define KVM_VMX_DEFAULT_PLE_WINDOW 4096 | |
105 | static int ple_gap = KVM_VMX_DEFAULT_PLE_GAP; | |
106 | module_param(ple_gap, int, S_IRUGO); | |
107 | ||
108 | static int ple_window = KVM_VMX_DEFAULT_PLE_WINDOW; | |
109 | module_param(ple_window, int, S_IRUGO); | |
110 | ||
61d2ef2c AK |
111 | #define NR_AUTOLOAD_MSRS 1 |
112 | ||
a2fa3e9f GH |
113 | struct vmcs { |
114 | u32 revision_id; | |
115 | u32 abort; | |
116 | char data[0]; | |
117 | }; | |
118 | ||
26bb0981 AK |
119 | struct shared_msr_entry { |
120 | unsigned index; | |
121 | u64 data; | |
d5696725 | 122 | u64 mask; |
26bb0981 AK |
123 | }; |
124 | ||
a2fa3e9f | 125 | struct vcpu_vmx { |
fb3f0f51 | 126 | struct kvm_vcpu vcpu; |
543e4243 | 127 | struct list_head local_vcpus_link; |
313dbd49 | 128 | unsigned long host_rsp; |
a2fa3e9f | 129 | int launched; |
29bd8a78 | 130 | u8 fail; |
51aa01d1 | 131 | u32 exit_intr_info; |
1155f76a | 132 | u32 idt_vectoring_info; |
26bb0981 | 133 | struct shared_msr_entry *guest_msrs; |
a2fa3e9f GH |
134 | int nmsrs; |
135 | int save_nmsrs; | |
a2fa3e9f | 136 | #ifdef CONFIG_X86_64 |
44ea2b17 AK |
137 | u64 msr_host_kernel_gs_base; |
138 | u64 msr_guest_kernel_gs_base; | |
a2fa3e9f GH |
139 | #endif |
140 | struct vmcs *vmcs; | |
61d2ef2c AK |
141 | struct msr_autoload { |
142 | unsigned nr; | |
143 | struct vmx_msr_entry guest[NR_AUTOLOAD_MSRS]; | |
144 | struct vmx_msr_entry host[NR_AUTOLOAD_MSRS]; | |
145 | } msr_autoload; | |
a2fa3e9f GH |
146 | struct { |
147 | int loaded; | |
148 | u16 fs_sel, gs_sel, ldt_sel; | |
152d3f2f LV |
149 | int gs_ldt_reload_needed; |
150 | int fs_reload_needed; | |
d77c26fc | 151 | } host_state; |
9c8cba37 | 152 | struct { |
7ffd92c5 | 153 | int vm86_active; |
78ac8b47 | 154 | ulong save_rflags; |
7ffd92c5 AK |
155 | struct kvm_save_segment { |
156 | u16 selector; | |
157 | unsigned long base; | |
158 | u32 limit; | |
159 | u32 ar; | |
160 | } tr, es, ds, fs, gs; | |
9c8cba37 | 161 | } rmode; |
2384d2b3 | 162 | int vpid; |
04fa4d32 | 163 | bool emulation_required; |
3b86cd99 JK |
164 | |
165 | /* Support for vnmi-less CPUs */ | |
166 | int soft_vnmi_blocked; | |
167 | ktime_t entry_time; | |
168 | s64 vnmi_blocked_time; | |
a0861c02 | 169 | u32 exit_reason; |
4e47c7a6 SY |
170 | |
171 | bool rdtscp_enabled; | |
a2fa3e9f GH |
172 | }; |
173 | ||
174 | static inline struct vcpu_vmx *to_vmx(struct kvm_vcpu *vcpu) | |
175 | { | |
fb3f0f51 | 176 | return container_of(vcpu, struct vcpu_vmx, vcpu); |
a2fa3e9f GH |
177 | } |
178 | ||
b7ebfb05 | 179 | static int init_rmode(struct kvm *kvm); |
4e1096d2 | 180 | static u64 construct_eptp(unsigned long root_hpa); |
4610c9cc DX |
181 | static void kvm_cpu_vmxon(u64 addr); |
182 | static void kvm_cpu_vmxoff(void); | |
75880a01 | 183 | |
6aa8b732 AK |
184 | static DEFINE_PER_CPU(struct vmcs *, vmxarea); |
185 | static DEFINE_PER_CPU(struct vmcs *, current_vmcs); | |
543e4243 | 186 | static DEFINE_PER_CPU(struct list_head, vcpus_on_cpu); |
3444d7da | 187 | static DEFINE_PER_CPU(struct desc_ptr, host_gdt); |
6aa8b732 | 188 | |
3e7c73e9 AK |
189 | static unsigned long *vmx_io_bitmap_a; |
190 | static unsigned long *vmx_io_bitmap_b; | |
5897297b AK |
191 | static unsigned long *vmx_msr_bitmap_legacy; |
192 | static unsigned long *vmx_msr_bitmap_longmode; | |
fdef3ad1 | 193 | |
2384d2b3 SY |
194 | static DECLARE_BITMAP(vmx_vpid_bitmap, VMX_NR_VPIDS); |
195 | static DEFINE_SPINLOCK(vmx_vpid_lock); | |
196 | ||
1c3d14fe | 197 | static struct vmcs_config { |
6aa8b732 AK |
198 | int size; |
199 | int order; | |
200 | u32 revision_id; | |
1c3d14fe YS |
201 | u32 pin_based_exec_ctrl; |
202 | u32 cpu_based_exec_ctrl; | |
f78e0e2e | 203 | u32 cpu_based_2nd_exec_ctrl; |
1c3d14fe YS |
204 | u32 vmexit_ctrl; |
205 | u32 vmentry_ctrl; | |
206 | } vmcs_config; | |
6aa8b732 | 207 | |
efff9e53 | 208 | static struct vmx_capability { |
d56f546d SY |
209 | u32 ept; |
210 | u32 vpid; | |
211 | } vmx_capability; | |
212 | ||
6aa8b732 AK |
213 | #define VMX_SEGMENT_FIELD(seg) \ |
214 | [VCPU_SREG_##seg] = { \ | |
215 | .selector = GUEST_##seg##_SELECTOR, \ | |
216 | .base = GUEST_##seg##_BASE, \ | |
217 | .limit = GUEST_##seg##_LIMIT, \ | |
218 | .ar_bytes = GUEST_##seg##_AR_BYTES, \ | |
219 | } | |
220 | ||
221 | static struct kvm_vmx_segment_field { | |
222 | unsigned selector; | |
223 | unsigned base; | |
224 | unsigned limit; | |
225 | unsigned ar_bytes; | |
226 | } kvm_vmx_segment_fields[] = { | |
227 | VMX_SEGMENT_FIELD(CS), | |
228 | VMX_SEGMENT_FIELD(DS), | |
229 | VMX_SEGMENT_FIELD(ES), | |
230 | VMX_SEGMENT_FIELD(FS), | |
231 | VMX_SEGMENT_FIELD(GS), | |
232 | VMX_SEGMENT_FIELD(SS), | |
233 | VMX_SEGMENT_FIELD(TR), | |
234 | VMX_SEGMENT_FIELD(LDTR), | |
235 | }; | |
236 | ||
26bb0981 AK |
237 | static u64 host_efer; |
238 | ||
6de4f3ad AK |
239 | static void ept_save_pdptrs(struct kvm_vcpu *vcpu); |
240 | ||
4d56c8a7 | 241 | /* |
8c06585d | 242 | * Keep MSR_STAR at the end, as setup_msrs() will try to optimize it |
4d56c8a7 AK |
243 | * away by decrementing the array size. |
244 | */ | |
6aa8b732 | 245 | static const u32 vmx_msr_index[] = { |
05b3e0c2 | 246 | #ifdef CONFIG_X86_64 |
44ea2b17 | 247 | MSR_SYSCALL_MASK, MSR_LSTAR, MSR_CSTAR, |
6aa8b732 | 248 | #endif |
8c06585d | 249 | MSR_EFER, MSR_TSC_AUX, MSR_STAR, |
6aa8b732 | 250 | }; |
9d8f549d | 251 | #define NR_VMX_MSR ARRAY_SIZE(vmx_msr_index) |
6aa8b732 | 252 | |
31299944 | 253 | static inline bool is_page_fault(u32 intr_info) |
6aa8b732 AK |
254 | { |
255 | return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK | | |
256 | INTR_INFO_VALID_MASK)) == | |
8ab2d2e2 | 257 | (INTR_TYPE_HARD_EXCEPTION | PF_VECTOR | INTR_INFO_VALID_MASK); |
6aa8b732 AK |
258 | } |
259 | ||
31299944 | 260 | static inline bool is_no_device(u32 intr_info) |
2ab455cc AL |
261 | { |
262 | return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK | | |
263 | INTR_INFO_VALID_MASK)) == | |
8ab2d2e2 | 264 | (INTR_TYPE_HARD_EXCEPTION | NM_VECTOR | INTR_INFO_VALID_MASK); |
2ab455cc AL |
265 | } |
266 | ||
31299944 | 267 | static inline bool is_invalid_opcode(u32 intr_info) |
7aa81cc0 AL |
268 | { |
269 | return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK | | |
270 | INTR_INFO_VALID_MASK)) == | |
8ab2d2e2 | 271 | (INTR_TYPE_HARD_EXCEPTION | UD_VECTOR | INTR_INFO_VALID_MASK); |
7aa81cc0 AL |
272 | } |
273 | ||
31299944 | 274 | static inline bool is_external_interrupt(u32 intr_info) |
6aa8b732 AK |
275 | { |
276 | return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VALID_MASK)) | |
277 | == (INTR_TYPE_EXT_INTR | INTR_INFO_VALID_MASK); | |
278 | } | |
279 | ||
31299944 | 280 | static inline bool is_machine_check(u32 intr_info) |
a0861c02 AK |
281 | { |
282 | return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK | | |
283 | INTR_INFO_VALID_MASK)) == | |
284 | (INTR_TYPE_HARD_EXCEPTION | MC_VECTOR | INTR_INFO_VALID_MASK); | |
285 | } | |
286 | ||
31299944 | 287 | static inline bool cpu_has_vmx_msr_bitmap(void) |
25c5f225 | 288 | { |
04547156 | 289 | return vmcs_config.cpu_based_exec_ctrl & CPU_BASED_USE_MSR_BITMAPS; |
25c5f225 SY |
290 | } |
291 | ||
31299944 | 292 | static inline bool cpu_has_vmx_tpr_shadow(void) |
6e5d865c | 293 | { |
04547156 | 294 | return vmcs_config.cpu_based_exec_ctrl & CPU_BASED_TPR_SHADOW; |
6e5d865c YS |
295 | } |
296 | ||
31299944 | 297 | static inline bool vm_need_tpr_shadow(struct kvm *kvm) |
6e5d865c | 298 | { |
04547156 | 299 | return (cpu_has_vmx_tpr_shadow()) && (irqchip_in_kernel(kvm)); |
6e5d865c YS |
300 | } |
301 | ||
31299944 | 302 | static inline bool cpu_has_secondary_exec_ctrls(void) |
f78e0e2e | 303 | { |
04547156 SY |
304 | return vmcs_config.cpu_based_exec_ctrl & |
305 | CPU_BASED_ACTIVATE_SECONDARY_CONTROLS; | |
f78e0e2e SY |
306 | } |
307 | ||
774ead3a | 308 | static inline bool cpu_has_vmx_virtualize_apic_accesses(void) |
f78e0e2e | 309 | { |
04547156 SY |
310 | return vmcs_config.cpu_based_2nd_exec_ctrl & |
311 | SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES; | |
312 | } | |
313 | ||
314 | static inline bool cpu_has_vmx_flexpriority(void) | |
315 | { | |
316 | return cpu_has_vmx_tpr_shadow() && | |
317 | cpu_has_vmx_virtualize_apic_accesses(); | |
f78e0e2e SY |
318 | } |
319 | ||
e799794e MT |
320 | static inline bool cpu_has_vmx_ept_execute_only(void) |
321 | { | |
31299944 | 322 | return vmx_capability.ept & VMX_EPT_EXECUTE_ONLY_BIT; |
e799794e MT |
323 | } |
324 | ||
325 | static inline bool cpu_has_vmx_eptp_uncacheable(void) | |
326 | { | |
31299944 | 327 | return vmx_capability.ept & VMX_EPTP_UC_BIT; |
e799794e MT |
328 | } |
329 | ||
330 | static inline bool cpu_has_vmx_eptp_writeback(void) | |
331 | { | |
31299944 | 332 | return vmx_capability.ept & VMX_EPTP_WB_BIT; |
e799794e MT |
333 | } |
334 | ||
335 | static inline bool cpu_has_vmx_ept_2m_page(void) | |
336 | { | |
31299944 | 337 | return vmx_capability.ept & VMX_EPT_2MB_PAGE_BIT; |
e799794e MT |
338 | } |
339 | ||
878403b7 SY |
340 | static inline bool cpu_has_vmx_ept_1g_page(void) |
341 | { | |
31299944 | 342 | return vmx_capability.ept & VMX_EPT_1GB_PAGE_BIT; |
878403b7 SY |
343 | } |
344 | ||
4bc9b982 SY |
345 | static inline bool cpu_has_vmx_ept_4levels(void) |
346 | { | |
347 | return vmx_capability.ept & VMX_EPT_PAGE_WALK_4_BIT; | |
348 | } | |
349 | ||
31299944 | 350 | static inline bool cpu_has_vmx_invept_individual_addr(void) |
d56f546d | 351 | { |
31299944 | 352 | return vmx_capability.ept & VMX_EPT_EXTENT_INDIVIDUAL_BIT; |
d56f546d SY |
353 | } |
354 | ||
31299944 | 355 | static inline bool cpu_has_vmx_invept_context(void) |
d56f546d | 356 | { |
31299944 | 357 | return vmx_capability.ept & VMX_EPT_EXTENT_CONTEXT_BIT; |
d56f546d SY |
358 | } |
359 | ||
31299944 | 360 | static inline bool cpu_has_vmx_invept_global(void) |
d56f546d | 361 | { |
31299944 | 362 | return vmx_capability.ept & VMX_EPT_EXTENT_GLOBAL_BIT; |
d56f546d SY |
363 | } |
364 | ||
518c8aee GJ |
365 | static inline bool cpu_has_vmx_invvpid_single(void) |
366 | { | |
367 | return vmx_capability.vpid & VMX_VPID_EXTENT_SINGLE_CONTEXT_BIT; | |
368 | } | |
369 | ||
b9d762fa GJ |
370 | static inline bool cpu_has_vmx_invvpid_global(void) |
371 | { | |
372 | return vmx_capability.vpid & VMX_VPID_EXTENT_GLOBAL_CONTEXT_BIT; | |
373 | } | |
374 | ||
31299944 | 375 | static inline bool cpu_has_vmx_ept(void) |
d56f546d | 376 | { |
04547156 SY |
377 | return vmcs_config.cpu_based_2nd_exec_ctrl & |
378 | SECONDARY_EXEC_ENABLE_EPT; | |
d56f546d SY |
379 | } |
380 | ||
31299944 | 381 | static inline bool cpu_has_vmx_unrestricted_guest(void) |
3a624e29 NK |
382 | { |
383 | return vmcs_config.cpu_based_2nd_exec_ctrl & | |
384 | SECONDARY_EXEC_UNRESTRICTED_GUEST; | |
385 | } | |
386 | ||
31299944 | 387 | static inline bool cpu_has_vmx_ple(void) |
4b8d54f9 ZE |
388 | { |
389 | return vmcs_config.cpu_based_2nd_exec_ctrl & | |
390 | SECONDARY_EXEC_PAUSE_LOOP_EXITING; | |
391 | } | |
392 | ||
31299944 | 393 | static inline bool vm_need_virtualize_apic_accesses(struct kvm *kvm) |
f78e0e2e | 394 | { |
6d3e435e | 395 | return flexpriority_enabled && irqchip_in_kernel(kvm); |
f78e0e2e SY |
396 | } |
397 | ||
31299944 | 398 | static inline bool cpu_has_vmx_vpid(void) |
2384d2b3 | 399 | { |
04547156 SY |
400 | return vmcs_config.cpu_based_2nd_exec_ctrl & |
401 | SECONDARY_EXEC_ENABLE_VPID; | |
2384d2b3 SY |
402 | } |
403 | ||
31299944 | 404 | static inline bool cpu_has_vmx_rdtscp(void) |
4e47c7a6 SY |
405 | { |
406 | return vmcs_config.cpu_based_2nd_exec_ctrl & | |
407 | SECONDARY_EXEC_RDTSCP; | |
408 | } | |
409 | ||
31299944 | 410 | static inline bool cpu_has_virtual_nmis(void) |
f08864b4 SY |
411 | { |
412 | return vmcs_config.pin_based_exec_ctrl & PIN_BASED_VIRTUAL_NMIS; | |
413 | } | |
414 | ||
f5f48ee1 SY |
415 | static inline bool cpu_has_vmx_wbinvd_exit(void) |
416 | { | |
417 | return vmcs_config.cpu_based_2nd_exec_ctrl & | |
418 | SECONDARY_EXEC_WBINVD_EXITING; | |
419 | } | |
420 | ||
04547156 SY |
421 | static inline bool report_flexpriority(void) |
422 | { | |
423 | return flexpriority_enabled; | |
424 | } | |
425 | ||
8b9cf98c | 426 | static int __find_msr_index(struct vcpu_vmx *vmx, u32 msr) |
7725f0ba AK |
427 | { |
428 | int i; | |
429 | ||
a2fa3e9f | 430 | for (i = 0; i < vmx->nmsrs; ++i) |
26bb0981 | 431 | if (vmx_msr_index[vmx->guest_msrs[i].index] == msr) |
a75beee6 ED |
432 | return i; |
433 | return -1; | |
434 | } | |
435 | ||
2384d2b3 SY |
436 | static inline void __invvpid(int ext, u16 vpid, gva_t gva) |
437 | { | |
438 | struct { | |
439 | u64 vpid : 16; | |
440 | u64 rsvd : 48; | |
441 | u64 gva; | |
442 | } operand = { vpid, 0, gva }; | |
443 | ||
4ecac3fd | 444 | asm volatile (__ex(ASM_VMX_INVVPID) |
2384d2b3 SY |
445 | /* CF==1 or ZF==1 --> rc = -1 */ |
446 | "; ja 1f ; ud2 ; 1:" | |
447 | : : "a"(&operand), "c"(ext) : "cc", "memory"); | |
448 | } | |
449 | ||
1439442c SY |
450 | static inline void __invept(int ext, u64 eptp, gpa_t gpa) |
451 | { | |
452 | struct { | |
453 | u64 eptp, gpa; | |
454 | } operand = {eptp, gpa}; | |
455 | ||
4ecac3fd | 456 | asm volatile (__ex(ASM_VMX_INVEPT) |
1439442c SY |
457 | /* CF==1 or ZF==1 --> rc = -1 */ |
458 | "; ja 1f ; ud2 ; 1:\n" | |
459 | : : "a" (&operand), "c" (ext) : "cc", "memory"); | |
460 | } | |
461 | ||
26bb0981 | 462 | static struct shared_msr_entry *find_msr_entry(struct vcpu_vmx *vmx, u32 msr) |
a75beee6 ED |
463 | { |
464 | int i; | |
465 | ||
8b9cf98c | 466 | i = __find_msr_index(vmx, msr); |
a75beee6 | 467 | if (i >= 0) |
a2fa3e9f | 468 | return &vmx->guest_msrs[i]; |
8b6d44c7 | 469 | return NULL; |
7725f0ba AK |
470 | } |
471 | ||
6aa8b732 AK |
472 | static void vmcs_clear(struct vmcs *vmcs) |
473 | { | |
474 | u64 phys_addr = __pa(vmcs); | |
475 | u8 error; | |
476 | ||
4ecac3fd | 477 | asm volatile (__ex(ASM_VMX_VMCLEAR_RAX) "; setna %0" |
6aa8b732 AK |
478 | : "=g"(error) : "a"(&phys_addr), "m"(phys_addr) |
479 | : "cc", "memory"); | |
480 | if (error) | |
481 | printk(KERN_ERR "kvm: vmclear fail: %p/%llx\n", | |
482 | vmcs, phys_addr); | |
483 | } | |
484 | ||
7725b894 DX |
485 | static void vmcs_load(struct vmcs *vmcs) |
486 | { | |
487 | u64 phys_addr = __pa(vmcs); | |
488 | u8 error; | |
489 | ||
490 | asm volatile (__ex(ASM_VMX_VMPTRLD_RAX) "; setna %0" | |
491 | : "=g"(error) : "a"(&phys_addr), "m"(phys_addr) | |
492 | : "cc", "memory"); | |
493 | if (error) | |
494 | printk(KERN_ERR "kvm: vmptrld %p/%llx fail\n", | |
495 | vmcs, phys_addr); | |
496 | } | |
497 | ||
6aa8b732 AK |
498 | static void __vcpu_clear(void *arg) |
499 | { | |
8b9cf98c | 500 | struct vcpu_vmx *vmx = arg; |
d3b2c338 | 501 | int cpu = raw_smp_processor_id(); |
6aa8b732 | 502 | |
8b9cf98c | 503 | if (vmx->vcpu.cpu == cpu) |
a2fa3e9f GH |
504 | vmcs_clear(vmx->vmcs); |
505 | if (per_cpu(current_vmcs, cpu) == vmx->vmcs) | |
6aa8b732 | 506 | per_cpu(current_vmcs, cpu) = NULL; |
543e4243 AK |
507 | list_del(&vmx->local_vcpus_link); |
508 | vmx->vcpu.cpu = -1; | |
509 | vmx->launched = 0; | |
6aa8b732 AK |
510 | } |
511 | ||
8b9cf98c | 512 | static void vcpu_clear(struct vcpu_vmx *vmx) |
8d0be2b3 | 513 | { |
eae5ecb5 AK |
514 | if (vmx->vcpu.cpu == -1) |
515 | return; | |
8691e5a8 | 516 | smp_call_function_single(vmx->vcpu.cpu, __vcpu_clear, vmx, 1); |
8d0be2b3 AK |
517 | } |
518 | ||
1760dd49 | 519 | static inline void vpid_sync_vcpu_single(struct vcpu_vmx *vmx) |
2384d2b3 SY |
520 | { |
521 | if (vmx->vpid == 0) | |
522 | return; | |
523 | ||
518c8aee GJ |
524 | if (cpu_has_vmx_invvpid_single()) |
525 | __invvpid(VMX_VPID_EXTENT_SINGLE_CONTEXT, vmx->vpid, 0); | |
2384d2b3 SY |
526 | } |
527 | ||
b9d762fa GJ |
528 | static inline void vpid_sync_vcpu_global(void) |
529 | { | |
530 | if (cpu_has_vmx_invvpid_global()) | |
531 | __invvpid(VMX_VPID_EXTENT_ALL_CONTEXT, 0, 0); | |
532 | } | |
533 | ||
534 | static inline void vpid_sync_context(struct vcpu_vmx *vmx) | |
535 | { | |
536 | if (cpu_has_vmx_invvpid_single()) | |
1760dd49 | 537 | vpid_sync_vcpu_single(vmx); |
b9d762fa GJ |
538 | else |
539 | vpid_sync_vcpu_global(); | |
540 | } | |
541 | ||
1439442c SY |
542 | static inline void ept_sync_global(void) |
543 | { | |
544 | if (cpu_has_vmx_invept_global()) | |
545 | __invept(VMX_EPT_EXTENT_GLOBAL, 0, 0); | |
546 | } | |
547 | ||
548 | static inline void ept_sync_context(u64 eptp) | |
549 | { | |
089d034e | 550 | if (enable_ept) { |
1439442c SY |
551 | if (cpu_has_vmx_invept_context()) |
552 | __invept(VMX_EPT_EXTENT_CONTEXT, eptp, 0); | |
553 | else | |
554 | ept_sync_global(); | |
555 | } | |
556 | } | |
557 | ||
558 | static inline void ept_sync_individual_addr(u64 eptp, gpa_t gpa) | |
559 | { | |
089d034e | 560 | if (enable_ept) { |
1439442c SY |
561 | if (cpu_has_vmx_invept_individual_addr()) |
562 | __invept(VMX_EPT_EXTENT_INDIVIDUAL_ADDR, | |
563 | eptp, gpa); | |
564 | else | |
565 | ept_sync_context(eptp); | |
566 | } | |
567 | } | |
568 | ||
6aa8b732 AK |
569 | static unsigned long vmcs_readl(unsigned long field) |
570 | { | |
a295673a | 571 | unsigned long value = 0; |
6aa8b732 | 572 | |
4ecac3fd | 573 | asm volatile (__ex(ASM_VMX_VMREAD_RDX_RAX) |
a295673a | 574 | : "+a"(value) : "d"(field) : "cc"); |
6aa8b732 AK |
575 | return value; |
576 | } | |
577 | ||
578 | static u16 vmcs_read16(unsigned long field) | |
579 | { | |
580 | return vmcs_readl(field); | |
581 | } | |
582 | ||
583 | static u32 vmcs_read32(unsigned long field) | |
584 | { | |
585 | return vmcs_readl(field); | |
586 | } | |
587 | ||
588 | static u64 vmcs_read64(unsigned long field) | |
589 | { | |
05b3e0c2 | 590 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
591 | return vmcs_readl(field); |
592 | #else | |
593 | return vmcs_readl(field) | ((u64)vmcs_readl(field+1) << 32); | |
594 | #endif | |
595 | } | |
596 | ||
e52de1b8 AK |
597 | static noinline void vmwrite_error(unsigned long field, unsigned long value) |
598 | { | |
599 | printk(KERN_ERR "vmwrite error: reg %lx value %lx (err %d)\n", | |
600 | field, value, vmcs_read32(VM_INSTRUCTION_ERROR)); | |
601 | dump_stack(); | |
602 | } | |
603 | ||
6aa8b732 AK |
604 | static void vmcs_writel(unsigned long field, unsigned long value) |
605 | { | |
606 | u8 error; | |
607 | ||
4ecac3fd | 608 | asm volatile (__ex(ASM_VMX_VMWRITE_RAX_RDX) "; setna %0" |
d77c26fc | 609 | : "=q"(error) : "a"(value), "d"(field) : "cc"); |
e52de1b8 AK |
610 | if (unlikely(error)) |
611 | vmwrite_error(field, value); | |
6aa8b732 AK |
612 | } |
613 | ||
614 | static void vmcs_write16(unsigned long field, u16 value) | |
615 | { | |
616 | vmcs_writel(field, value); | |
617 | } | |
618 | ||
619 | static void vmcs_write32(unsigned long field, u32 value) | |
620 | { | |
621 | vmcs_writel(field, value); | |
622 | } | |
623 | ||
624 | static void vmcs_write64(unsigned long field, u64 value) | |
625 | { | |
6aa8b732 | 626 | vmcs_writel(field, value); |
7682f2d0 | 627 | #ifndef CONFIG_X86_64 |
6aa8b732 AK |
628 | asm volatile (""); |
629 | vmcs_writel(field+1, value >> 32); | |
630 | #endif | |
631 | } | |
632 | ||
2ab455cc AL |
633 | static void vmcs_clear_bits(unsigned long field, u32 mask) |
634 | { | |
635 | vmcs_writel(field, vmcs_readl(field) & ~mask); | |
636 | } | |
637 | ||
638 | static void vmcs_set_bits(unsigned long field, u32 mask) | |
639 | { | |
640 | vmcs_writel(field, vmcs_readl(field) | mask); | |
641 | } | |
642 | ||
abd3f2d6 AK |
643 | static void update_exception_bitmap(struct kvm_vcpu *vcpu) |
644 | { | |
645 | u32 eb; | |
646 | ||
fd7373cc JK |
647 | eb = (1u << PF_VECTOR) | (1u << UD_VECTOR) | (1u << MC_VECTOR) | |
648 | (1u << NM_VECTOR) | (1u << DB_VECTOR); | |
649 | if ((vcpu->guest_debug & | |
650 | (KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_SW_BP)) == | |
651 | (KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_SW_BP)) | |
652 | eb |= 1u << BP_VECTOR; | |
7ffd92c5 | 653 | if (to_vmx(vcpu)->rmode.vm86_active) |
abd3f2d6 | 654 | eb = ~0; |
089d034e | 655 | if (enable_ept) |
1439442c | 656 | eb &= ~(1u << PF_VECTOR); /* bypass_guest_pf = 0 */ |
02daab21 AK |
657 | if (vcpu->fpu_active) |
658 | eb &= ~(1u << NM_VECTOR); | |
abd3f2d6 AK |
659 | vmcs_write32(EXCEPTION_BITMAP, eb); |
660 | } | |
661 | ||
61d2ef2c AK |
662 | static void clear_atomic_switch_msr(struct vcpu_vmx *vmx, unsigned msr) |
663 | { | |
664 | unsigned i; | |
665 | struct msr_autoload *m = &vmx->msr_autoload; | |
666 | ||
667 | for (i = 0; i < m->nr; ++i) | |
668 | if (m->guest[i].index == msr) | |
669 | break; | |
670 | ||
671 | if (i == m->nr) | |
672 | return; | |
673 | --m->nr; | |
674 | m->guest[i] = m->guest[m->nr]; | |
675 | m->host[i] = m->host[m->nr]; | |
676 | vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, m->nr); | |
677 | vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, m->nr); | |
678 | } | |
679 | ||
680 | static void add_atomic_switch_msr(struct vcpu_vmx *vmx, unsigned msr, | |
681 | u64 guest_val, u64 host_val) | |
682 | { | |
683 | unsigned i; | |
684 | struct msr_autoload *m = &vmx->msr_autoload; | |
685 | ||
686 | for (i = 0; i < m->nr; ++i) | |
687 | if (m->guest[i].index == msr) | |
688 | break; | |
689 | ||
690 | if (i == m->nr) { | |
691 | ++m->nr; | |
692 | vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, m->nr); | |
693 | vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, m->nr); | |
694 | } | |
695 | ||
696 | m->guest[i].index = msr; | |
697 | m->guest[i].value = guest_val; | |
698 | m->host[i].index = msr; | |
699 | m->host[i].value = host_val; | |
700 | } | |
701 | ||
33ed6329 AK |
702 | static void reload_tss(void) |
703 | { | |
33ed6329 AK |
704 | /* |
705 | * VT restores TR but not its size. Useless. | |
706 | */ | |
d359192f | 707 | struct desc_ptr *gdt = &__get_cpu_var(host_gdt); |
a5f61300 | 708 | struct desc_struct *descs; |
33ed6329 | 709 | |
d359192f | 710 | descs = (void *)gdt->address; |
33ed6329 AK |
711 | descs[GDT_ENTRY_TSS].type = 9; /* available TSS */ |
712 | load_TR_desc(); | |
33ed6329 AK |
713 | } |
714 | ||
92c0d900 | 715 | static bool update_transition_efer(struct vcpu_vmx *vmx, int efer_offset) |
2cc51560 | 716 | { |
3a34a881 | 717 | u64 guest_efer; |
51c6cf66 AK |
718 | u64 ignore_bits; |
719 | ||
f6801dff | 720 | guest_efer = vmx->vcpu.arch.efer; |
3a34a881 | 721 | |
51c6cf66 AK |
722 | /* |
723 | * NX is emulated; LMA and LME handled by hardware; SCE meaninless | |
724 | * outside long mode | |
725 | */ | |
726 | ignore_bits = EFER_NX | EFER_SCE; | |
727 | #ifdef CONFIG_X86_64 | |
728 | ignore_bits |= EFER_LMA | EFER_LME; | |
729 | /* SCE is meaningful only in long mode on Intel */ | |
730 | if (guest_efer & EFER_LMA) | |
731 | ignore_bits &= ~(u64)EFER_SCE; | |
732 | #endif | |
51c6cf66 AK |
733 | guest_efer &= ~ignore_bits; |
734 | guest_efer |= host_efer & ignore_bits; | |
26bb0981 | 735 | vmx->guest_msrs[efer_offset].data = guest_efer; |
d5696725 | 736 | vmx->guest_msrs[efer_offset].mask = ~ignore_bits; |
84ad33ef AK |
737 | |
738 | clear_atomic_switch_msr(vmx, MSR_EFER); | |
739 | /* On ept, can't emulate nx, and must switch nx atomically */ | |
740 | if (enable_ept && ((vmx->vcpu.arch.efer ^ host_efer) & EFER_NX)) { | |
741 | guest_efer = vmx->vcpu.arch.efer; | |
742 | if (!(guest_efer & EFER_LMA)) | |
743 | guest_efer &= ~EFER_LME; | |
744 | add_atomic_switch_msr(vmx, MSR_EFER, guest_efer, host_efer); | |
745 | return false; | |
746 | } | |
747 | ||
26bb0981 | 748 | return true; |
51c6cf66 AK |
749 | } |
750 | ||
2d49ec72 GN |
751 | static unsigned long segment_base(u16 selector) |
752 | { | |
d359192f | 753 | struct desc_ptr *gdt = &__get_cpu_var(host_gdt); |
2d49ec72 GN |
754 | struct desc_struct *d; |
755 | unsigned long table_base; | |
756 | unsigned long v; | |
757 | ||
758 | if (!(selector & ~3)) | |
759 | return 0; | |
760 | ||
d359192f | 761 | table_base = gdt->address; |
2d49ec72 GN |
762 | |
763 | if (selector & 4) { /* from ldt */ | |
764 | u16 ldt_selector = kvm_read_ldt(); | |
765 | ||
766 | if (!(ldt_selector & ~3)) | |
767 | return 0; | |
768 | ||
769 | table_base = segment_base(ldt_selector); | |
770 | } | |
771 | d = (struct desc_struct *)(table_base + (selector & ~7)); | |
772 | v = get_desc_base(d); | |
773 | #ifdef CONFIG_X86_64 | |
774 | if (d->s == 0 && (d->type == 2 || d->type == 9 || d->type == 11)) | |
775 | v |= ((unsigned long)((struct ldttss_desc64 *)d)->base3) << 32; | |
776 | #endif | |
777 | return v; | |
778 | } | |
779 | ||
780 | static inline unsigned long kvm_read_tr_base(void) | |
781 | { | |
782 | u16 tr; | |
783 | asm("str %0" : "=g"(tr)); | |
784 | return segment_base(tr); | |
785 | } | |
786 | ||
04d2cc77 | 787 | static void vmx_save_host_state(struct kvm_vcpu *vcpu) |
33ed6329 | 788 | { |
04d2cc77 | 789 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
26bb0981 | 790 | int i; |
04d2cc77 | 791 | |
a2fa3e9f | 792 | if (vmx->host_state.loaded) |
33ed6329 AK |
793 | return; |
794 | ||
a2fa3e9f | 795 | vmx->host_state.loaded = 1; |
33ed6329 AK |
796 | /* |
797 | * Set host fs and gs selectors. Unfortunately, 22.2.3 does not | |
798 | * allow segment selectors with cpl > 0 or ti == 1. | |
799 | */ | |
d6e88aec | 800 | vmx->host_state.ldt_sel = kvm_read_ldt(); |
152d3f2f | 801 | vmx->host_state.gs_ldt_reload_needed = vmx->host_state.ldt_sel; |
9581d442 | 802 | savesegment(fs, vmx->host_state.fs_sel); |
152d3f2f | 803 | if (!(vmx->host_state.fs_sel & 7)) { |
a2fa3e9f | 804 | vmcs_write16(HOST_FS_SELECTOR, vmx->host_state.fs_sel); |
152d3f2f LV |
805 | vmx->host_state.fs_reload_needed = 0; |
806 | } else { | |
33ed6329 | 807 | vmcs_write16(HOST_FS_SELECTOR, 0); |
152d3f2f | 808 | vmx->host_state.fs_reload_needed = 1; |
33ed6329 | 809 | } |
9581d442 | 810 | savesegment(gs, vmx->host_state.gs_sel); |
a2fa3e9f GH |
811 | if (!(vmx->host_state.gs_sel & 7)) |
812 | vmcs_write16(HOST_GS_SELECTOR, vmx->host_state.gs_sel); | |
33ed6329 AK |
813 | else { |
814 | vmcs_write16(HOST_GS_SELECTOR, 0); | |
152d3f2f | 815 | vmx->host_state.gs_ldt_reload_needed = 1; |
33ed6329 AK |
816 | } |
817 | ||
818 | #ifdef CONFIG_X86_64 | |
819 | vmcs_writel(HOST_FS_BASE, read_msr(MSR_FS_BASE)); | |
820 | vmcs_writel(HOST_GS_BASE, read_msr(MSR_GS_BASE)); | |
821 | #else | |
a2fa3e9f GH |
822 | vmcs_writel(HOST_FS_BASE, segment_base(vmx->host_state.fs_sel)); |
823 | vmcs_writel(HOST_GS_BASE, segment_base(vmx->host_state.gs_sel)); | |
33ed6329 | 824 | #endif |
707c0874 AK |
825 | |
826 | #ifdef CONFIG_X86_64 | |
c8770e7b AK |
827 | rdmsrl(MSR_KERNEL_GS_BASE, vmx->msr_host_kernel_gs_base); |
828 | if (is_long_mode(&vmx->vcpu)) | |
44ea2b17 | 829 | wrmsrl(MSR_KERNEL_GS_BASE, vmx->msr_guest_kernel_gs_base); |
707c0874 | 830 | #endif |
26bb0981 AK |
831 | for (i = 0; i < vmx->save_nmsrs; ++i) |
832 | kvm_set_shared_msr(vmx->guest_msrs[i].index, | |
d5696725 AK |
833 | vmx->guest_msrs[i].data, |
834 | vmx->guest_msrs[i].mask); | |
33ed6329 AK |
835 | } |
836 | ||
a9b21b62 | 837 | static void __vmx_load_host_state(struct vcpu_vmx *vmx) |
33ed6329 | 838 | { |
a2fa3e9f | 839 | if (!vmx->host_state.loaded) |
33ed6329 AK |
840 | return; |
841 | ||
e1beb1d3 | 842 | ++vmx->vcpu.stat.host_state_reload; |
a2fa3e9f | 843 | vmx->host_state.loaded = 0; |
c8770e7b AK |
844 | #ifdef CONFIG_X86_64 |
845 | if (is_long_mode(&vmx->vcpu)) | |
846 | rdmsrl(MSR_KERNEL_GS_BASE, vmx->msr_guest_kernel_gs_base); | |
847 | #endif | |
152d3f2f | 848 | if (vmx->host_state.gs_ldt_reload_needed) { |
d6e88aec | 849 | kvm_load_ldt(vmx->host_state.ldt_sel); |
33ed6329 | 850 | #ifdef CONFIG_X86_64 |
9581d442 | 851 | load_gs_index(vmx->host_state.gs_sel); |
9581d442 AK |
852 | #else |
853 | loadsegment(gs, vmx->host_state.gs_sel); | |
33ed6329 | 854 | #endif |
33ed6329 | 855 | } |
0a77fe4c AK |
856 | if (vmx->host_state.fs_reload_needed) |
857 | loadsegment(fs, vmx->host_state.fs_sel); | |
152d3f2f | 858 | reload_tss(); |
44ea2b17 | 859 | #ifdef CONFIG_X86_64 |
c8770e7b | 860 | wrmsrl(MSR_KERNEL_GS_BASE, vmx->msr_host_kernel_gs_base); |
44ea2b17 | 861 | #endif |
1c11e713 AK |
862 | if (current_thread_info()->status & TS_USEDFPU) |
863 | clts(); | |
3444d7da | 864 | load_gdt(&__get_cpu_var(host_gdt)); |
33ed6329 AK |
865 | } |
866 | ||
a9b21b62 AK |
867 | static void vmx_load_host_state(struct vcpu_vmx *vmx) |
868 | { | |
869 | preempt_disable(); | |
870 | __vmx_load_host_state(vmx); | |
871 | preempt_enable(); | |
872 | } | |
873 | ||
6aa8b732 AK |
874 | /* |
875 | * Switches to specified vcpu, until a matching vcpu_put(), but assumes | |
876 | * vcpu mutex is already taken. | |
877 | */ | |
15ad7146 | 878 | static void vmx_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
6aa8b732 | 879 | { |
a2fa3e9f | 880 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
4610c9cc | 881 | u64 phys_addr = __pa(per_cpu(vmxarea, cpu)); |
6aa8b732 | 882 | |
4610c9cc DX |
883 | if (!vmm_exclusive) |
884 | kvm_cpu_vmxon(phys_addr); | |
885 | else if (vcpu->cpu != cpu) | |
8b9cf98c | 886 | vcpu_clear(vmx); |
6aa8b732 | 887 | |
a2fa3e9f | 888 | if (per_cpu(current_vmcs, cpu) != vmx->vmcs) { |
a2fa3e9f | 889 | per_cpu(current_vmcs, cpu) = vmx->vmcs; |
7725b894 | 890 | vmcs_load(vmx->vmcs); |
6aa8b732 AK |
891 | } |
892 | ||
893 | if (vcpu->cpu != cpu) { | |
d359192f | 894 | struct desc_ptr *gdt = &__get_cpu_var(host_gdt); |
6aa8b732 AK |
895 | unsigned long sysenter_esp; |
896 | ||
a8eeb04a | 897 | kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); |
92fe13be DX |
898 | local_irq_disable(); |
899 | list_add(&vmx->local_vcpus_link, | |
900 | &per_cpu(vcpus_on_cpu, cpu)); | |
901 | local_irq_enable(); | |
902 | ||
6aa8b732 AK |
903 | /* |
904 | * Linux uses per-cpu TSS and GDT, so set these when switching | |
905 | * processors. | |
906 | */ | |
d6e88aec | 907 | vmcs_writel(HOST_TR_BASE, kvm_read_tr_base()); /* 22.2.4 */ |
d359192f | 908 | vmcs_writel(HOST_GDTR_BASE, gdt->address); /* 22.2.4 */ |
6aa8b732 AK |
909 | |
910 | rdmsrl(MSR_IA32_SYSENTER_ESP, sysenter_esp); | |
911 | vmcs_writel(HOST_IA32_SYSENTER_ESP, sysenter_esp); /* 22.2.3 */ | |
912 | } | |
6aa8b732 AK |
913 | } |
914 | ||
915 | static void vmx_vcpu_put(struct kvm_vcpu *vcpu) | |
916 | { | |
a9b21b62 | 917 | __vmx_load_host_state(to_vmx(vcpu)); |
4610c9cc | 918 | if (!vmm_exclusive) { |
b923e62e | 919 | __vcpu_clear(to_vmx(vcpu)); |
4610c9cc DX |
920 | kvm_cpu_vmxoff(); |
921 | } | |
6aa8b732 AK |
922 | } |
923 | ||
5fd86fcf AK |
924 | static void vmx_fpu_activate(struct kvm_vcpu *vcpu) |
925 | { | |
81231c69 AK |
926 | ulong cr0; |
927 | ||
5fd86fcf AK |
928 | if (vcpu->fpu_active) |
929 | return; | |
930 | vcpu->fpu_active = 1; | |
81231c69 AK |
931 | cr0 = vmcs_readl(GUEST_CR0); |
932 | cr0 &= ~(X86_CR0_TS | X86_CR0_MP); | |
933 | cr0 |= kvm_read_cr0_bits(vcpu, X86_CR0_TS | X86_CR0_MP); | |
934 | vmcs_writel(GUEST_CR0, cr0); | |
5fd86fcf | 935 | update_exception_bitmap(vcpu); |
edcafe3c AK |
936 | vcpu->arch.cr0_guest_owned_bits = X86_CR0_TS; |
937 | vmcs_writel(CR0_GUEST_HOST_MASK, ~vcpu->arch.cr0_guest_owned_bits); | |
5fd86fcf AK |
938 | } |
939 | ||
edcafe3c AK |
940 | static void vmx_decache_cr0_guest_bits(struct kvm_vcpu *vcpu); |
941 | ||
5fd86fcf AK |
942 | static void vmx_fpu_deactivate(struct kvm_vcpu *vcpu) |
943 | { | |
edcafe3c | 944 | vmx_decache_cr0_guest_bits(vcpu); |
81231c69 | 945 | vmcs_set_bits(GUEST_CR0, X86_CR0_TS | X86_CR0_MP); |
5fd86fcf | 946 | update_exception_bitmap(vcpu); |
edcafe3c AK |
947 | vcpu->arch.cr0_guest_owned_bits = 0; |
948 | vmcs_writel(CR0_GUEST_HOST_MASK, ~vcpu->arch.cr0_guest_owned_bits); | |
949 | vmcs_writel(CR0_READ_SHADOW, vcpu->arch.cr0); | |
5fd86fcf AK |
950 | } |
951 | ||
6aa8b732 AK |
952 | static unsigned long vmx_get_rflags(struct kvm_vcpu *vcpu) |
953 | { | |
78ac8b47 | 954 | unsigned long rflags, save_rflags; |
345dcaa8 AK |
955 | |
956 | rflags = vmcs_readl(GUEST_RFLAGS); | |
78ac8b47 AK |
957 | if (to_vmx(vcpu)->rmode.vm86_active) { |
958 | rflags &= RMODE_GUEST_OWNED_EFLAGS_BITS; | |
959 | save_rflags = to_vmx(vcpu)->rmode.save_rflags; | |
960 | rflags |= save_rflags & ~RMODE_GUEST_OWNED_EFLAGS_BITS; | |
961 | } | |
345dcaa8 | 962 | return rflags; |
6aa8b732 AK |
963 | } |
964 | ||
965 | static void vmx_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags) | |
966 | { | |
78ac8b47 AK |
967 | if (to_vmx(vcpu)->rmode.vm86_active) { |
968 | to_vmx(vcpu)->rmode.save_rflags = rflags; | |
053de044 | 969 | rflags |= X86_EFLAGS_IOPL | X86_EFLAGS_VM; |
78ac8b47 | 970 | } |
6aa8b732 AK |
971 | vmcs_writel(GUEST_RFLAGS, rflags); |
972 | } | |
973 | ||
2809f5d2 GC |
974 | static u32 vmx_get_interrupt_shadow(struct kvm_vcpu *vcpu, int mask) |
975 | { | |
976 | u32 interruptibility = vmcs_read32(GUEST_INTERRUPTIBILITY_INFO); | |
977 | int ret = 0; | |
978 | ||
979 | if (interruptibility & GUEST_INTR_STATE_STI) | |
48005f64 | 980 | ret |= KVM_X86_SHADOW_INT_STI; |
2809f5d2 | 981 | if (interruptibility & GUEST_INTR_STATE_MOV_SS) |
48005f64 | 982 | ret |= KVM_X86_SHADOW_INT_MOV_SS; |
2809f5d2 GC |
983 | |
984 | return ret & mask; | |
985 | } | |
986 | ||
987 | static void vmx_set_interrupt_shadow(struct kvm_vcpu *vcpu, int mask) | |
988 | { | |
989 | u32 interruptibility_old = vmcs_read32(GUEST_INTERRUPTIBILITY_INFO); | |
990 | u32 interruptibility = interruptibility_old; | |
991 | ||
992 | interruptibility &= ~(GUEST_INTR_STATE_STI | GUEST_INTR_STATE_MOV_SS); | |
993 | ||
48005f64 | 994 | if (mask & KVM_X86_SHADOW_INT_MOV_SS) |
2809f5d2 | 995 | interruptibility |= GUEST_INTR_STATE_MOV_SS; |
48005f64 | 996 | else if (mask & KVM_X86_SHADOW_INT_STI) |
2809f5d2 GC |
997 | interruptibility |= GUEST_INTR_STATE_STI; |
998 | ||
999 | if ((interruptibility != interruptibility_old)) | |
1000 | vmcs_write32(GUEST_INTERRUPTIBILITY_INFO, interruptibility); | |
1001 | } | |
1002 | ||
6aa8b732 AK |
1003 | static void skip_emulated_instruction(struct kvm_vcpu *vcpu) |
1004 | { | |
1005 | unsigned long rip; | |
6aa8b732 | 1006 | |
5fdbf976 | 1007 | rip = kvm_rip_read(vcpu); |
6aa8b732 | 1008 | rip += vmcs_read32(VM_EXIT_INSTRUCTION_LEN); |
5fdbf976 | 1009 | kvm_rip_write(vcpu, rip); |
6aa8b732 | 1010 | |
2809f5d2 GC |
1011 | /* skipping an emulated instruction also counts */ |
1012 | vmx_set_interrupt_shadow(vcpu, 0); | |
6aa8b732 AK |
1013 | } |
1014 | ||
443381a8 AL |
1015 | static void vmx_clear_hlt(struct kvm_vcpu *vcpu) |
1016 | { | |
1017 | /* Ensure that we clear the HLT state in the VMCS. We don't need to | |
1018 | * explicitly skip the instruction because if the HLT state is set, then | |
1019 | * the instruction is already executing and RIP has already been | |
1020 | * advanced. */ | |
1021 | if (!yield_on_hlt && | |
1022 | vmcs_read32(GUEST_ACTIVITY_STATE) == GUEST_ACTIVITY_HLT) | |
1023 | vmcs_write32(GUEST_ACTIVITY_STATE, GUEST_ACTIVITY_ACTIVE); | |
1024 | } | |
1025 | ||
298101da | 1026 | static void vmx_queue_exception(struct kvm_vcpu *vcpu, unsigned nr, |
ce7ddec4 JR |
1027 | bool has_error_code, u32 error_code, |
1028 | bool reinject) | |
298101da | 1029 | { |
77ab6db0 | 1030 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
8ab2d2e2 | 1031 | u32 intr_info = nr | INTR_INFO_VALID_MASK; |
77ab6db0 | 1032 | |
8ab2d2e2 | 1033 | if (has_error_code) { |
77ab6db0 | 1034 | vmcs_write32(VM_ENTRY_EXCEPTION_ERROR_CODE, error_code); |
8ab2d2e2 JK |
1035 | intr_info |= INTR_INFO_DELIVER_CODE_MASK; |
1036 | } | |
77ab6db0 | 1037 | |
7ffd92c5 | 1038 | if (vmx->rmode.vm86_active) { |
a92601bb MG |
1039 | if (kvm_inject_realmode_interrupt(vcpu, nr) != EMULATE_DONE) |
1040 | kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu); | |
77ab6db0 JK |
1041 | return; |
1042 | } | |
1043 | ||
66fd3f7f GN |
1044 | if (kvm_exception_is_soft(nr)) { |
1045 | vmcs_write32(VM_ENTRY_INSTRUCTION_LEN, | |
1046 | vmx->vcpu.arch.event_exit_inst_len); | |
8ab2d2e2 JK |
1047 | intr_info |= INTR_TYPE_SOFT_EXCEPTION; |
1048 | } else | |
1049 | intr_info |= INTR_TYPE_HARD_EXCEPTION; | |
1050 | ||
1051 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, intr_info); | |
443381a8 | 1052 | vmx_clear_hlt(vcpu); |
298101da AK |
1053 | } |
1054 | ||
4e47c7a6 SY |
1055 | static bool vmx_rdtscp_supported(void) |
1056 | { | |
1057 | return cpu_has_vmx_rdtscp(); | |
1058 | } | |
1059 | ||
a75beee6 ED |
1060 | /* |
1061 | * Swap MSR entry in host/guest MSR entry array. | |
1062 | */ | |
8b9cf98c | 1063 | static void move_msr_up(struct vcpu_vmx *vmx, int from, int to) |
a75beee6 | 1064 | { |
26bb0981 | 1065 | struct shared_msr_entry tmp; |
a2fa3e9f GH |
1066 | |
1067 | tmp = vmx->guest_msrs[to]; | |
1068 | vmx->guest_msrs[to] = vmx->guest_msrs[from]; | |
1069 | vmx->guest_msrs[from] = tmp; | |
a75beee6 ED |
1070 | } |
1071 | ||
e38aea3e AK |
1072 | /* |
1073 | * Set up the vmcs to automatically save and restore system | |
1074 | * msrs. Don't touch the 64-bit msrs if the guest is in legacy | |
1075 | * mode, as fiddling with msrs is very expensive. | |
1076 | */ | |
8b9cf98c | 1077 | static void setup_msrs(struct vcpu_vmx *vmx) |
e38aea3e | 1078 | { |
26bb0981 | 1079 | int save_nmsrs, index; |
5897297b | 1080 | unsigned long *msr_bitmap; |
e38aea3e | 1081 | |
33f9c505 | 1082 | vmx_load_host_state(vmx); |
a75beee6 ED |
1083 | save_nmsrs = 0; |
1084 | #ifdef CONFIG_X86_64 | |
8b9cf98c | 1085 | if (is_long_mode(&vmx->vcpu)) { |
8b9cf98c | 1086 | index = __find_msr_index(vmx, MSR_SYSCALL_MASK); |
a75beee6 | 1087 | if (index >= 0) |
8b9cf98c RR |
1088 | move_msr_up(vmx, index, save_nmsrs++); |
1089 | index = __find_msr_index(vmx, MSR_LSTAR); | |
a75beee6 | 1090 | if (index >= 0) |
8b9cf98c RR |
1091 | move_msr_up(vmx, index, save_nmsrs++); |
1092 | index = __find_msr_index(vmx, MSR_CSTAR); | |
a75beee6 | 1093 | if (index >= 0) |
8b9cf98c | 1094 | move_msr_up(vmx, index, save_nmsrs++); |
4e47c7a6 SY |
1095 | index = __find_msr_index(vmx, MSR_TSC_AUX); |
1096 | if (index >= 0 && vmx->rdtscp_enabled) | |
1097 | move_msr_up(vmx, index, save_nmsrs++); | |
a75beee6 | 1098 | /* |
8c06585d | 1099 | * MSR_STAR is only needed on long mode guests, and only |
a75beee6 ED |
1100 | * if efer.sce is enabled. |
1101 | */ | |
8c06585d | 1102 | index = __find_msr_index(vmx, MSR_STAR); |
f6801dff | 1103 | if ((index >= 0) && (vmx->vcpu.arch.efer & EFER_SCE)) |
8b9cf98c | 1104 | move_msr_up(vmx, index, save_nmsrs++); |
a75beee6 ED |
1105 | } |
1106 | #endif | |
92c0d900 AK |
1107 | index = __find_msr_index(vmx, MSR_EFER); |
1108 | if (index >= 0 && update_transition_efer(vmx, index)) | |
26bb0981 | 1109 | move_msr_up(vmx, index, save_nmsrs++); |
e38aea3e | 1110 | |
26bb0981 | 1111 | vmx->save_nmsrs = save_nmsrs; |
5897297b AK |
1112 | |
1113 | if (cpu_has_vmx_msr_bitmap()) { | |
1114 | if (is_long_mode(&vmx->vcpu)) | |
1115 | msr_bitmap = vmx_msr_bitmap_longmode; | |
1116 | else | |
1117 | msr_bitmap = vmx_msr_bitmap_legacy; | |
1118 | ||
1119 | vmcs_write64(MSR_BITMAP, __pa(msr_bitmap)); | |
1120 | } | |
e38aea3e AK |
1121 | } |
1122 | ||
6aa8b732 AK |
1123 | /* |
1124 | * reads and returns guest's timestamp counter "register" | |
1125 | * guest_tsc = host_tsc + tsc_offset -- 21.3 | |
1126 | */ | |
1127 | static u64 guest_read_tsc(void) | |
1128 | { | |
1129 | u64 host_tsc, tsc_offset; | |
1130 | ||
1131 | rdtscll(host_tsc); | |
1132 | tsc_offset = vmcs_read64(TSC_OFFSET); | |
1133 | return host_tsc + tsc_offset; | |
1134 | } | |
1135 | ||
1136 | /* | |
99e3e30a | 1137 | * writes 'offset' into guest's timestamp counter offset register |
6aa8b732 | 1138 | */ |
99e3e30a | 1139 | static void vmx_write_tsc_offset(struct kvm_vcpu *vcpu, u64 offset) |
6aa8b732 | 1140 | { |
f4e1b3c8 | 1141 | vmcs_write64(TSC_OFFSET, offset); |
6aa8b732 AK |
1142 | } |
1143 | ||
e48672fa ZA |
1144 | static void vmx_adjust_tsc_offset(struct kvm_vcpu *vcpu, s64 adjustment) |
1145 | { | |
1146 | u64 offset = vmcs_read64(TSC_OFFSET); | |
1147 | vmcs_write64(TSC_OFFSET, offset + adjustment); | |
1148 | } | |
1149 | ||
6aa8b732 AK |
1150 | /* |
1151 | * Reads an msr value (of 'msr_index') into 'pdata'. | |
1152 | * Returns 0 on success, non-0 otherwise. | |
1153 | * Assumes vcpu_load() was already called. | |
1154 | */ | |
1155 | static int vmx_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata) | |
1156 | { | |
1157 | u64 data; | |
26bb0981 | 1158 | struct shared_msr_entry *msr; |
6aa8b732 AK |
1159 | |
1160 | if (!pdata) { | |
1161 | printk(KERN_ERR "BUG: get_msr called with NULL pdata\n"); | |
1162 | return -EINVAL; | |
1163 | } | |
1164 | ||
1165 | switch (msr_index) { | |
05b3e0c2 | 1166 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
1167 | case MSR_FS_BASE: |
1168 | data = vmcs_readl(GUEST_FS_BASE); | |
1169 | break; | |
1170 | case MSR_GS_BASE: | |
1171 | data = vmcs_readl(GUEST_GS_BASE); | |
1172 | break; | |
44ea2b17 AK |
1173 | case MSR_KERNEL_GS_BASE: |
1174 | vmx_load_host_state(to_vmx(vcpu)); | |
1175 | data = to_vmx(vcpu)->msr_guest_kernel_gs_base; | |
1176 | break; | |
26bb0981 | 1177 | #endif |
6aa8b732 | 1178 | case MSR_EFER: |
3bab1f5d | 1179 | return kvm_get_msr_common(vcpu, msr_index, pdata); |
af24a4e4 | 1180 | case MSR_IA32_TSC: |
6aa8b732 AK |
1181 | data = guest_read_tsc(); |
1182 | break; | |
1183 | case MSR_IA32_SYSENTER_CS: | |
1184 | data = vmcs_read32(GUEST_SYSENTER_CS); | |
1185 | break; | |
1186 | case MSR_IA32_SYSENTER_EIP: | |
f5b42c33 | 1187 | data = vmcs_readl(GUEST_SYSENTER_EIP); |
6aa8b732 AK |
1188 | break; |
1189 | case MSR_IA32_SYSENTER_ESP: | |
f5b42c33 | 1190 | data = vmcs_readl(GUEST_SYSENTER_ESP); |
6aa8b732 | 1191 | break; |
4e47c7a6 SY |
1192 | case MSR_TSC_AUX: |
1193 | if (!to_vmx(vcpu)->rdtscp_enabled) | |
1194 | return 1; | |
1195 | /* Otherwise falls through */ | |
6aa8b732 | 1196 | default: |
26bb0981 | 1197 | vmx_load_host_state(to_vmx(vcpu)); |
8b9cf98c | 1198 | msr = find_msr_entry(to_vmx(vcpu), msr_index); |
3bab1f5d | 1199 | if (msr) { |
542423b0 | 1200 | vmx_load_host_state(to_vmx(vcpu)); |
3bab1f5d AK |
1201 | data = msr->data; |
1202 | break; | |
6aa8b732 | 1203 | } |
3bab1f5d | 1204 | return kvm_get_msr_common(vcpu, msr_index, pdata); |
6aa8b732 AK |
1205 | } |
1206 | ||
1207 | *pdata = data; | |
1208 | return 0; | |
1209 | } | |
1210 | ||
1211 | /* | |
1212 | * Writes msr value into into the appropriate "register". | |
1213 | * Returns 0 on success, non-0 otherwise. | |
1214 | * Assumes vcpu_load() was already called. | |
1215 | */ | |
1216 | static int vmx_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data) | |
1217 | { | |
a2fa3e9f | 1218 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
26bb0981 | 1219 | struct shared_msr_entry *msr; |
2cc51560 ED |
1220 | int ret = 0; |
1221 | ||
6aa8b732 | 1222 | switch (msr_index) { |
3bab1f5d | 1223 | case MSR_EFER: |
a9b21b62 | 1224 | vmx_load_host_state(vmx); |
2cc51560 | 1225 | ret = kvm_set_msr_common(vcpu, msr_index, data); |
2cc51560 | 1226 | break; |
16175a79 | 1227 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
1228 | case MSR_FS_BASE: |
1229 | vmcs_writel(GUEST_FS_BASE, data); | |
1230 | break; | |
1231 | case MSR_GS_BASE: | |
1232 | vmcs_writel(GUEST_GS_BASE, data); | |
1233 | break; | |
44ea2b17 AK |
1234 | case MSR_KERNEL_GS_BASE: |
1235 | vmx_load_host_state(vmx); | |
1236 | vmx->msr_guest_kernel_gs_base = data; | |
1237 | break; | |
6aa8b732 AK |
1238 | #endif |
1239 | case MSR_IA32_SYSENTER_CS: | |
1240 | vmcs_write32(GUEST_SYSENTER_CS, data); | |
1241 | break; | |
1242 | case MSR_IA32_SYSENTER_EIP: | |
f5b42c33 | 1243 | vmcs_writel(GUEST_SYSENTER_EIP, data); |
6aa8b732 AK |
1244 | break; |
1245 | case MSR_IA32_SYSENTER_ESP: | |
f5b42c33 | 1246 | vmcs_writel(GUEST_SYSENTER_ESP, data); |
6aa8b732 | 1247 | break; |
af24a4e4 | 1248 | case MSR_IA32_TSC: |
99e3e30a | 1249 | kvm_write_tsc(vcpu, data); |
6aa8b732 | 1250 | break; |
468d472f SY |
1251 | case MSR_IA32_CR_PAT: |
1252 | if (vmcs_config.vmentry_ctrl & VM_ENTRY_LOAD_IA32_PAT) { | |
1253 | vmcs_write64(GUEST_IA32_PAT, data); | |
1254 | vcpu->arch.pat = data; | |
1255 | break; | |
1256 | } | |
4e47c7a6 SY |
1257 | ret = kvm_set_msr_common(vcpu, msr_index, data); |
1258 | break; | |
1259 | case MSR_TSC_AUX: | |
1260 | if (!vmx->rdtscp_enabled) | |
1261 | return 1; | |
1262 | /* Check reserved bit, higher 32 bits should be zero */ | |
1263 | if ((data >> 32) != 0) | |
1264 | return 1; | |
1265 | /* Otherwise falls through */ | |
6aa8b732 | 1266 | default: |
8b9cf98c | 1267 | msr = find_msr_entry(vmx, msr_index); |
3bab1f5d | 1268 | if (msr) { |
542423b0 | 1269 | vmx_load_host_state(vmx); |
3bab1f5d AK |
1270 | msr->data = data; |
1271 | break; | |
6aa8b732 | 1272 | } |
2cc51560 | 1273 | ret = kvm_set_msr_common(vcpu, msr_index, data); |
6aa8b732 AK |
1274 | } |
1275 | ||
2cc51560 | 1276 | return ret; |
6aa8b732 AK |
1277 | } |
1278 | ||
5fdbf976 | 1279 | static void vmx_cache_reg(struct kvm_vcpu *vcpu, enum kvm_reg reg) |
6aa8b732 | 1280 | { |
5fdbf976 MT |
1281 | __set_bit(reg, (unsigned long *)&vcpu->arch.regs_avail); |
1282 | switch (reg) { | |
1283 | case VCPU_REGS_RSP: | |
1284 | vcpu->arch.regs[VCPU_REGS_RSP] = vmcs_readl(GUEST_RSP); | |
1285 | break; | |
1286 | case VCPU_REGS_RIP: | |
1287 | vcpu->arch.regs[VCPU_REGS_RIP] = vmcs_readl(GUEST_RIP); | |
1288 | break; | |
6de4f3ad AK |
1289 | case VCPU_EXREG_PDPTR: |
1290 | if (enable_ept) | |
1291 | ept_save_pdptrs(vcpu); | |
1292 | break; | |
5fdbf976 MT |
1293 | default: |
1294 | break; | |
1295 | } | |
6aa8b732 AK |
1296 | } |
1297 | ||
355be0b9 | 1298 | static void set_guest_debug(struct kvm_vcpu *vcpu, struct kvm_guest_debug *dbg) |
6aa8b732 | 1299 | { |
ae675ef0 JK |
1300 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) |
1301 | vmcs_writel(GUEST_DR7, dbg->arch.debugreg[7]); | |
1302 | else | |
1303 | vmcs_writel(GUEST_DR7, vcpu->arch.dr7); | |
1304 | ||
abd3f2d6 | 1305 | update_exception_bitmap(vcpu); |
6aa8b732 AK |
1306 | } |
1307 | ||
1308 | static __init int cpu_has_kvm_support(void) | |
1309 | { | |
6210e37b | 1310 | return cpu_has_vmx(); |
6aa8b732 AK |
1311 | } |
1312 | ||
1313 | static __init int vmx_disabled_by_bios(void) | |
1314 | { | |
1315 | u64 msr; | |
1316 | ||
1317 | rdmsrl(MSR_IA32_FEATURE_CONTROL, msr); | |
cafd6659 SW |
1318 | if (msr & FEATURE_CONTROL_LOCKED) { |
1319 | if (!(msr & FEATURE_CONTROL_VMXON_ENABLED_INSIDE_SMX) | |
1320 | && tboot_enabled()) | |
1321 | return 1; | |
1322 | if (!(msr & FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX) | |
f9335afe SW |
1323 | && !tboot_enabled()) { |
1324 | printk(KERN_WARNING "kvm: disable TXT in the BIOS or " | |
1325 | " activate TXT before enabling KVM\n"); | |
cafd6659 | 1326 | return 1; |
f9335afe | 1327 | } |
cafd6659 SW |
1328 | } |
1329 | ||
1330 | return 0; | |
62b3ffb8 | 1331 | /* locked but not enabled */ |
6aa8b732 AK |
1332 | } |
1333 | ||
7725b894 DX |
1334 | static void kvm_cpu_vmxon(u64 addr) |
1335 | { | |
1336 | asm volatile (ASM_VMX_VMXON_RAX | |
1337 | : : "a"(&addr), "m"(addr) | |
1338 | : "memory", "cc"); | |
1339 | } | |
1340 | ||
10474ae8 | 1341 | static int hardware_enable(void *garbage) |
6aa8b732 AK |
1342 | { |
1343 | int cpu = raw_smp_processor_id(); | |
1344 | u64 phys_addr = __pa(per_cpu(vmxarea, cpu)); | |
cafd6659 | 1345 | u64 old, test_bits; |
6aa8b732 | 1346 | |
10474ae8 AG |
1347 | if (read_cr4() & X86_CR4_VMXE) |
1348 | return -EBUSY; | |
1349 | ||
543e4243 | 1350 | INIT_LIST_HEAD(&per_cpu(vcpus_on_cpu, cpu)); |
6aa8b732 | 1351 | rdmsrl(MSR_IA32_FEATURE_CONTROL, old); |
cafd6659 SW |
1352 | |
1353 | test_bits = FEATURE_CONTROL_LOCKED; | |
1354 | test_bits |= FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX; | |
1355 | if (tboot_enabled()) | |
1356 | test_bits |= FEATURE_CONTROL_VMXON_ENABLED_INSIDE_SMX; | |
1357 | ||
1358 | if ((old & test_bits) != test_bits) { | |
6aa8b732 | 1359 | /* enable and lock */ |
cafd6659 SW |
1360 | wrmsrl(MSR_IA32_FEATURE_CONTROL, old | test_bits); |
1361 | } | |
66aee91a | 1362 | write_cr4(read_cr4() | X86_CR4_VMXE); /* FIXME: not cpu hotplug safe */ |
10474ae8 | 1363 | |
4610c9cc DX |
1364 | if (vmm_exclusive) { |
1365 | kvm_cpu_vmxon(phys_addr); | |
1366 | ept_sync_global(); | |
1367 | } | |
10474ae8 | 1368 | |
3444d7da AK |
1369 | store_gdt(&__get_cpu_var(host_gdt)); |
1370 | ||
10474ae8 | 1371 | return 0; |
6aa8b732 AK |
1372 | } |
1373 | ||
543e4243 AK |
1374 | static void vmclear_local_vcpus(void) |
1375 | { | |
1376 | int cpu = raw_smp_processor_id(); | |
1377 | struct vcpu_vmx *vmx, *n; | |
1378 | ||
1379 | list_for_each_entry_safe(vmx, n, &per_cpu(vcpus_on_cpu, cpu), | |
1380 | local_vcpus_link) | |
1381 | __vcpu_clear(vmx); | |
1382 | } | |
1383 | ||
710ff4a8 EH |
1384 | |
1385 | /* Just like cpu_vmxoff(), but with the __kvm_handle_fault_on_reboot() | |
1386 | * tricks. | |
1387 | */ | |
1388 | static void kvm_cpu_vmxoff(void) | |
6aa8b732 | 1389 | { |
4ecac3fd | 1390 | asm volatile (__ex(ASM_VMX_VMXOFF) : : : "cc"); |
6aa8b732 AK |
1391 | } |
1392 | ||
710ff4a8 EH |
1393 | static void hardware_disable(void *garbage) |
1394 | { | |
4610c9cc DX |
1395 | if (vmm_exclusive) { |
1396 | vmclear_local_vcpus(); | |
1397 | kvm_cpu_vmxoff(); | |
1398 | } | |
7725b894 | 1399 | write_cr4(read_cr4() & ~X86_CR4_VMXE); |
710ff4a8 EH |
1400 | } |
1401 | ||
1c3d14fe | 1402 | static __init int adjust_vmx_controls(u32 ctl_min, u32 ctl_opt, |
d77c26fc | 1403 | u32 msr, u32 *result) |
1c3d14fe YS |
1404 | { |
1405 | u32 vmx_msr_low, vmx_msr_high; | |
1406 | u32 ctl = ctl_min | ctl_opt; | |
1407 | ||
1408 | rdmsr(msr, vmx_msr_low, vmx_msr_high); | |
1409 | ||
1410 | ctl &= vmx_msr_high; /* bit == 0 in high word ==> must be zero */ | |
1411 | ctl |= vmx_msr_low; /* bit == 1 in low word ==> must be one */ | |
1412 | ||
1413 | /* Ensure minimum (required) set of control bits are supported. */ | |
1414 | if (ctl_min & ~ctl) | |
002c7f7c | 1415 | return -EIO; |
1c3d14fe YS |
1416 | |
1417 | *result = ctl; | |
1418 | return 0; | |
1419 | } | |
1420 | ||
002c7f7c | 1421 | static __init int setup_vmcs_config(struct vmcs_config *vmcs_conf) |
6aa8b732 AK |
1422 | { |
1423 | u32 vmx_msr_low, vmx_msr_high; | |
d56f546d | 1424 | u32 min, opt, min2, opt2; |
1c3d14fe YS |
1425 | u32 _pin_based_exec_control = 0; |
1426 | u32 _cpu_based_exec_control = 0; | |
f78e0e2e | 1427 | u32 _cpu_based_2nd_exec_control = 0; |
1c3d14fe YS |
1428 | u32 _vmexit_control = 0; |
1429 | u32 _vmentry_control = 0; | |
1430 | ||
1431 | min = PIN_BASED_EXT_INTR_MASK | PIN_BASED_NMI_EXITING; | |
f08864b4 | 1432 | opt = PIN_BASED_VIRTUAL_NMIS; |
1c3d14fe YS |
1433 | if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_PINBASED_CTLS, |
1434 | &_pin_based_exec_control) < 0) | |
002c7f7c | 1435 | return -EIO; |
1c3d14fe | 1436 | |
443381a8 | 1437 | min = |
1c3d14fe YS |
1438 | #ifdef CONFIG_X86_64 |
1439 | CPU_BASED_CR8_LOAD_EXITING | | |
1440 | CPU_BASED_CR8_STORE_EXITING | | |
1441 | #endif | |
d56f546d SY |
1442 | CPU_BASED_CR3_LOAD_EXITING | |
1443 | CPU_BASED_CR3_STORE_EXITING | | |
1c3d14fe YS |
1444 | CPU_BASED_USE_IO_BITMAPS | |
1445 | CPU_BASED_MOV_DR_EXITING | | |
a7052897 | 1446 | CPU_BASED_USE_TSC_OFFSETING | |
59708670 SY |
1447 | CPU_BASED_MWAIT_EXITING | |
1448 | CPU_BASED_MONITOR_EXITING | | |
a7052897 | 1449 | CPU_BASED_INVLPG_EXITING; |
443381a8 AL |
1450 | |
1451 | if (yield_on_hlt) | |
1452 | min |= CPU_BASED_HLT_EXITING; | |
1453 | ||
f78e0e2e | 1454 | opt = CPU_BASED_TPR_SHADOW | |
25c5f225 | 1455 | CPU_BASED_USE_MSR_BITMAPS | |
f78e0e2e | 1456 | CPU_BASED_ACTIVATE_SECONDARY_CONTROLS; |
1c3d14fe YS |
1457 | if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_PROCBASED_CTLS, |
1458 | &_cpu_based_exec_control) < 0) | |
002c7f7c | 1459 | return -EIO; |
6e5d865c YS |
1460 | #ifdef CONFIG_X86_64 |
1461 | if ((_cpu_based_exec_control & CPU_BASED_TPR_SHADOW)) | |
1462 | _cpu_based_exec_control &= ~CPU_BASED_CR8_LOAD_EXITING & | |
1463 | ~CPU_BASED_CR8_STORE_EXITING; | |
1464 | #endif | |
f78e0e2e | 1465 | if (_cpu_based_exec_control & CPU_BASED_ACTIVATE_SECONDARY_CONTROLS) { |
d56f546d SY |
1466 | min2 = 0; |
1467 | opt2 = SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES | | |
2384d2b3 | 1468 | SECONDARY_EXEC_WBINVD_EXITING | |
d56f546d | 1469 | SECONDARY_EXEC_ENABLE_VPID | |
3a624e29 | 1470 | SECONDARY_EXEC_ENABLE_EPT | |
4b8d54f9 | 1471 | SECONDARY_EXEC_UNRESTRICTED_GUEST | |
4e47c7a6 SY |
1472 | SECONDARY_EXEC_PAUSE_LOOP_EXITING | |
1473 | SECONDARY_EXEC_RDTSCP; | |
d56f546d SY |
1474 | if (adjust_vmx_controls(min2, opt2, |
1475 | MSR_IA32_VMX_PROCBASED_CTLS2, | |
f78e0e2e SY |
1476 | &_cpu_based_2nd_exec_control) < 0) |
1477 | return -EIO; | |
1478 | } | |
1479 | #ifndef CONFIG_X86_64 | |
1480 | if (!(_cpu_based_2nd_exec_control & | |
1481 | SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES)) | |
1482 | _cpu_based_exec_control &= ~CPU_BASED_TPR_SHADOW; | |
1483 | #endif | |
d56f546d | 1484 | if (_cpu_based_2nd_exec_control & SECONDARY_EXEC_ENABLE_EPT) { |
a7052897 MT |
1485 | /* CR3 accesses and invlpg don't need to cause VM Exits when EPT |
1486 | enabled */ | |
5fff7d27 GN |
1487 | _cpu_based_exec_control &= ~(CPU_BASED_CR3_LOAD_EXITING | |
1488 | CPU_BASED_CR3_STORE_EXITING | | |
1489 | CPU_BASED_INVLPG_EXITING); | |
d56f546d SY |
1490 | rdmsr(MSR_IA32_VMX_EPT_VPID_CAP, |
1491 | vmx_capability.ept, vmx_capability.vpid); | |
1492 | } | |
1c3d14fe YS |
1493 | |
1494 | min = 0; | |
1495 | #ifdef CONFIG_X86_64 | |
1496 | min |= VM_EXIT_HOST_ADDR_SPACE_SIZE; | |
1497 | #endif | |
468d472f | 1498 | opt = VM_EXIT_SAVE_IA32_PAT | VM_EXIT_LOAD_IA32_PAT; |
1c3d14fe YS |
1499 | if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_EXIT_CTLS, |
1500 | &_vmexit_control) < 0) | |
002c7f7c | 1501 | return -EIO; |
1c3d14fe | 1502 | |
468d472f SY |
1503 | min = 0; |
1504 | opt = VM_ENTRY_LOAD_IA32_PAT; | |
1c3d14fe YS |
1505 | if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_ENTRY_CTLS, |
1506 | &_vmentry_control) < 0) | |
002c7f7c | 1507 | return -EIO; |
6aa8b732 | 1508 | |
c68876fd | 1509 | rdmsr(MSR_IA32_VMX_BASIC, vmx_msr_low, vmx_msr_high); |
1c3d14fe YS |
1510 | |
1511 | /* IA-32 SDM Vol 3B: VMCS size is never greater than 4kB. */ | |
1512 | if ((vmx_msr_high & 0x1fff) > PAGE_SIZE) | |
002c7f7c | 1513 | return -EIO; |
1c3d14fe YS |
1514 | |
1515 | #ifdef CONFIG_X86_64 | |
1516 | /* IA-32 SDM Vol 3B: 64-bit CPUs always have VMX_BASIC_MSR[48]==0. */ | |
1517 | if (vmx_msr_high & (1u<<16)) | |
002c7f7c | 1518 | return -EIO; |
1c3d14fe YS |
1519 | #endif |
1520 | ||
1521 | /* Require Write-Back (WB) memory type for VMCS accesses. */ | |
1522 | if (((vmx_msr_high >> 18) & 15) != 6) | |
002c7f7c | 1523 | return -EIO; |
1c3d14fe | 1524 | |
002c7f7c YS |
1525 | vmcs_conf->size = vmx_msr_high & 0x1fff; |
1526 | vmcs_conf->order = get_order(vmcs_config.size); | |
1527 | vmcs_conf->revision_id = vmx_msr_low; | |
1c3d14fe | 1528 | |
002c7f7c YS |
1529 | vmcs_conf->pin_based_exec_ctrl = _pin_based_exec_control; |
1530 | vmcs_conf->cpu_based_exec_ctrl = _cpu_based_exec_control; | |
f78e0e2e | 1531 | vmcs_conf->cpu_based_2nd_exec_ctrl = _cpu_based_2nd_exec_control; |
002c7f7c YS |
1532 | vmcs_conf->vmexit_ctrl = _vmexit_control; |
1533 | vmcs_conf->vmentry_ctrl = _vmentry_control; | |
1c3d14fe YS |
1534 | |
1535 | return 0; | |
c68876fd | 1536 | } |
6aa8b732 AK |
1537 | |
1538 | static struct vmcs *alloc_vmcs_cpu(int cpu) | |
1539 | { | |
1540 | int node = cpu_to_node(cpu); | |
1541 | struct page *pages; | |
1542 | struct vmcs *vmcs; | |
1543 | ||
6484eb3e | 1544 | pages = alloc_pages_exact_node(node, GFP_KERNEL, vmcs_config.order); |
6aa8b732 AK |
1545 | if (!pages) |
1546 | return NULL; | |
1547 | vmcs = page_address(pages); | |
1c3d14fe YS |
1548 | memset(vmcs, 0, vmcs_config.size); |
1549 | vmcs->revision_id = vmcs_config.revision_id; /* vmcs revision id */ | |
6aa8b732 AK |
1550 | return vmcs; |
1551 | } | |
1552 | ||
1553 | static struct vmcs *alloc_vmcs(void) | |
1554 | { | |
d3b2c338 | 1555 | return alloc_vmcs_cpu(raw_smp_processor_id()); |
6aa8b732 AK |
1556 | } |
1557 | ||
1558 | static void free_vmcs(struct vmcs *vmcs) | |
1559 | { | |
1c3d14fe | 1560 | free_pages((unsigned long)vmcs, vmcs_config.order); |
6aa8b732 AK |
1561 | } |
1562 | ||
39959588 | 1563 | static void free_kvm_area(void) |
6aa8b732 AK |
1564 | { |
1565 | int cpu; | |
1566 | ||
3230bb47 | 1567 | for_each_possible_cpu(cpu) { |
6aa8b732 | 1568 | free_vmcs(per_cpu(vmxarea, cpu)); |
3230bb47 ZA |
1569 | per_cpu(vmxarea, cpu) = NULL; |
1570 | } | |
6aa8b732 AK |
1571 | } |
1572 | ||
6aa8b732 AK |
1573 | static __init int alloc_kvm_area(void) |
1574 | { | |
1575 | int cpu; | |
1576 | ||
3230bb47 | 1577 | for_each_possible_cpu(cpu) { |
6aa8b732 AK |
1578 | struct vmcs *vmcs; |
1579 | ||
1580 | vmcs = alloc_vmcs_cpu(cpu); | |
1581 | if (!vmcs) { | |
1582 | free_kvm_area(); | |
1583 | return -ENOMEM; | |
1584 | } | |
1585 | ||
1586 | per_cpu(vmxarea, cpu) = vmcs; | |
1587 | } | |
1588 | return 0; | |
1589 | } | |
1590 | ||
1591 | static __init int hardware_setup(void) | |
1592 | { | |
002c7f7c YS |
1593 | if (setup_vmcs_config(&vmcs_config) < 0) |
1594 | return -EIO; | |
50a37eb4 JR |
1595 | |
1596 | if (boot_cpu_has(X86_FEATURE_NX)) | |
1597 | kvm_enable_efer_bits(EFER_NX); | |
1598 | ||
93ba03c2 SY |
1599 | if (!cpu_has_vmx_vpid()) |
1600 | enable_vpid = 0; | |
1601 | ||
4bc9b982 SY |
1602 | if (!cpu_has_vmx_ept() || |
1603 | !cpu_has_vmx_ept_4levels()) { | |
93ba03c2 | 1604 | enable_ept = 0; |
3a624e29 NK |
1605 | enable_unrestricted_guest = 0; |
1606 | } | |
1607 | ||
1608 | if (!cpu_has_vmx_unrestricted_guest()) | |
1609 | enable_unrestricted_guest = 0; | |
93ba03c2 SY |
1610 | |
1611 | if (!cpu_has_vmx_flexpriority()) | |
1612 | flexpriority_enabled = 0; | |
1613 | ||
95ba8273 GN |
1614 | if (!cpu_has_vmx_tpr_shadow()) |
1615 | kvm_x86_ops->update_cr8_intercept = NULL; | |
1616 | ||
54dee993 MT |
1617 | if (enable_ept && !cpu_has_vmx_ept_2m_page()) |
1618 | kvm_disable_largepages(); | |
1619 | ||
4b8d54f9 ZE |
1620 | if (!cpu_has_vmx_ple()) |
1621 | ple_gap = 0; | |
1622 | ||
6aa8b732 AK |
1623 | return alloc_kvm_area(); |
1624 | } | |
1625 | ||
1626 | static __exit void hardware_unsetup(void) | |
1627 | { | |
1628 | free_kvm_area(); | |
1629 | } | |
1630 | ||
6aa8b732 AK |
1631 | static void fix_pmode_dataseg(int seg, struct kvm_save_segment *save) |
1632 | { | |
1633 | struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; | |
1634 | ||
6af11b9e | 1635 | if (vmcs_readl(sf->base) == save->base && (save->base & AR_S_MASK)) { |
6aa8b732 AK |
1636 | vmcs_write16(sf->selector, save->selector); |
1637 | vmcs_writel(sf->base, save->base); | |
1638 | vmcs_write32(sf->limit, save->limit); | |
1639 | vmcs_write32(sf->ar_bytes, save->ar); | |
1640 | } else { | |
1641 | u32 dpl = (vmcs_read16(sf->selector) & SELECTOR_RPL_MASK) | |
1642 | << AR_DPL_SHIFT; | |
1643 | vmcs_write32(sf->ar_bytes, 0x93 | dpl); | |
1644 | } | |
1645 | } | |
1646 | ||
1647 | static void enter_pmode(struct kvm_vcpu *vcpu) | |
1648 | { | |
1649 | unsigned long flags; | |
a89a8fb9 | 1650 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
6aa8b732 | 1651 | |
a89a8fb9 | 1652 | vmx->emulation_required = 1; |
7ffd92c5 | 1653 | vmx->rmode.vm86_active = 0; |
6aa8b732 | 1654 | |
7ffd92c5 AK |
1655 | vmcs_writel(GUEST_TR_BASE, vmx->rmode.tr.base); |
1656 | vmcs_write32(GUEST_TR_LIMIT, vmx->rmode.tr.limit); | |
1657 | vmcs_write32(GUEST_TR_AR_BYTES, vmx->rmode.tr.ar); | |
6aa8b732 AK |
1658 | |
1659 | flags = vmcs_readl(GUEST_RFLAGS); | |
78ac8b47 AK |
1660 | flags &= RMODE_GUEST_OWNED_EFLAGS_BITS; |
1661 | flags |= vmx->rmode.save_rflags & ~RMODE_GUEST_OWNED_EFLAGS_BITS; | |
6aa8b732 AK |
1662 | vmcs_writel(GUEST_RFLAGS, flags); |
1663 | ||
66aee91a RR |
1664 | vmcs_writel(GUEST_CR4, (vmcs_readl(GUEST_CR4) & ~X86_CR4_VME) | |
1665 | (vmcs_readl(CR4_READ_SHADOW) & X86_CR4_VME)); | |
6aa8b732 AK |
1666 | |
1667 | update_exception_bitmap(vcpu); | |
1668 | ||
a89a8fb9 MG |
1669 | if (emulate_invalid_guest_state) |
1670 | return; | |
1671 | ||
7ffd92c5 AK |
1672 | fix_pmode_dataseg(VCPU_SREG_ES, &vmx->rmode.es); |
1673 | fix_pmode_dataseg(VCPU_SREG_DS, &vmx->rmode.ds); | |
1674 | fix_pmode_dataseg(VCPU_SREG_GS, &vmx->rmode.gs); | |
1675 | fix_pmode_dataseg(VCPU_SREG_FS, &vmx->rmode.fs); | |
6aa8b732 AK |
1676 | |
1677 | vmcs_write16(GUEST_SS_SELECTOR, 0); | |
1678 | vmcs_write32(GUEST_SS_AR_BYTES, 0x93); | |
1679 | ||
1680 | vmcs_write16(GUEST_CS_SELECTOR, | |
1681 | vmcs_read16(GUEST_CS_SELECTOR) & ~SELECTOR_RPL_MASK); | |
1682 | vmcs_write32(GUEST_CS_AR_BYTES, 0x9b); | |
1683 | } | |
1684 | ||
d77c26fc | 1685 | static gva_t rmode_tss_base(struct kvm *kvm) |
6aa8b732 | 1686 | { |
bfc6d222 | 1687 | if (!kvm->arch.tss_addr) { |
bc6678a3 MT |
1688 | struct kvm_memslots *slots; |
1689 | gfn_t base_gfn; | |
1690 | ||
90d83dc3 | 1691 | slots = kvm_memslots(kvm); |
f495c6e5 | 1692 | base_gfn = slots->memslots[0].base_gfn + |
46a26bf5 | 1693 | kvm->memslots->memslots[0].npages - 3; |
cbc94022 IE |
1694 | return base_gfn << PAGE_SHIFT; |
1695 | } | |
bfc6d222 | 1696 | return kvm->arch.tss_addr; |
6aa8b732 AK |
1697 | } |
1698 | ||
1699 | static void fix_rmode_seg(int seg, struct kvm_save_segment *save) | |
1700 | { | |
1701 | struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; | |
1702 | ||
1703 | save->selector = vmcs_read16(sf->selector); | |
1704 | save->base = vmcs_readl(sf->base); | |
1705 | save->limit = vmcs_read32(sf->limit); | |
1706 | save->ar = vmcs_read32(sf->ar_bytes); | |
15b00f32 JK |
1707 | vmcs_write16(sf->selector, save->base >> 4); |
1708 | vmcs_write32(sf->base, save->base & 0xfffff); | |
6aa8b732 AK |
1709 | vmcs_write32(sf->limit, 0xffff); |
1710 | vmcs_write32(sf->ar_bytes, 0xf3); | |
1711 | } | |
1712 | ||
1713 | static void enter_rmode(struct kvm_vcpu *vcpu) | |
1714 | { | |
1715 | unsigned long flags; | |
a89a8fb9 | 1716 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
6aa8b732 | 1717 | |
3a624e29 NK |
1718 | if (enable_unrestricted_guest) |
1719 | return; | |
1720 | ||
a89a8fb9 | 1721 | vmx->emulation_required = 1; |
7ffd92c5 | 1722 | vmx->rmode.vm86_active = 1; |
6aa8b732 | 1723 | |
7ffd92c5 | 1724 | vmx->rmode.tr.base = vmcs_readl(GUEST_TR_BASE); |
6aa8b732 AK |
1725 | vmcs_writel(GUEST_TR_BASE, rmode_tss_base(vcpu->kvm)); |
1726 | ||
7ffd92c5 | 1727 | vmx->rmode.tr.limit = vmcs_read32(GUEST_TR_LIMIT); |
6aa8b732 AK |
1728 | vmcs_write32(GUEST_TR_LIMIT, RMODE_TSS_SIZE - 1); |
1729 | ||
7ffd92c5 | 1730 | vmx->rmode.tr.ar = vmcs_read32(GUEST_TR_AR_BYTES); |
6aa8b732 AK |
1731 | vmcs_write32(GUEST_TR_AR_BYTES, 0x008b); |
1732 | ||
1733 | flags = vmcs_readl(GUEST_RFLAGS); | |
78ac8b47 | 1734 | vmx->rmode.save_rflags = flags; |
6aa8b732 | 1735 | |
053de044 | 1736 | flags |= X86_EFLAGS_IOPL | X86_EFLAGS_VM; |
6aa8b732 AK |
1737 | |
1738 | vmcs_writel(GUEST_RFLAGS, flags); | |
66aee91a | 1739 | vmcs_writel(GUEST_CR4, vmcs_readl(GUEST_CR4) | X86_CR4_VME); |
6aa8b732 AK |
1740 | update_exception_bitmap(vcpu); |
1741 | ||
a89a8fb9 MG |
1742 | if (emulate_invalid_guest_state) |
1743 | goto continue_rmode; | |
1744 | ||
6aa8b732 AK |
1745 | vmcs_write16(GUEST_SS_SELECTOR, vmcs_readl(GUEST_SS_BASE) >> 4); |
1746 | vmcs_write32(GUEST_SS_LIMIT, 0xffff); | |
1747 | vmcs_write32(GUEST_SS_AR_BYTES, 0xf3); | |
1748 | ||
1749 | vmcs_write32(GUEST_CS_AR_BYTES, 0xf3); | |
abacf8df | 1750 | vmcs_write32(GUEST_CS_LIMIT, 0xffff); |
8cb5b033 AK |
1751 | if (vmcs_readl(GUEST_CS_BASE) == 0xffff0000) |
1752 | vmcs_writel(GUEST_CS_BASE, 0xf0000); | |
6aa8b732 AK |
1753 | vmcs_write16(GUEST_CS_SELECTOR, vmcs_readl(GUEST_CS_BASE) >> 4); |
1754 | ||
7ffd92c5 AK |
1755 | fix_rmode_seg(VCPU_SREG_ES, &vmx->rmode.es); |
1756 | fix_rmode_seg(VCPU_SREG_DS, &vmx->rmode.ds); | |
1757 | fix_rmode_seg(VCPU_SREG_GS, &vmx->rmode.gs); | |
1758 | fix_rmode_seg(VCPU_SREG_FS, &vmx->rmode.fs); | |
75880a01 | 1759 | |
a89a8fb9 | 1760 | continue_rmode: |
8668a3c4 | 1761 | kvm_mmu_reset_context(vcpu); |
b7ebfb05 | 1762 | init_rmode(vcpu->kvm); |
6aa8b732 AK |
1763 | } |
1764 | ||
401d10de AS |
1765 | static void vmx_set_efer(struct kvm_vcpu *vcpu, u64 efer) |
1766 | { | |
1767 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
26bb0981 AK |
1768 | struct shared_msr_entry *msr = find_msr_entry(vmx, MSR_EFER); |
1769 | ||
1770 | if (!msr) | |
1771 | return; | |
401d10de | 1772 | |
44ea2b17 AK |
1773 | /* |
1774 | * Force kernel_gs_base reloading before EFER changes, as control | |
1775 | * of this msr depends on is_long_mode(). | |
1776 | */ | |
1777 | vmx_load_host_state(to_vmx(vcpu)); | |
f6801dff | 1778 | vcpu->arch.efer = efer; |
401d10de AS |
1779 | if (efer & EFER_LMA) { |
1780 | vmcs_write32(VM_ENTRY_CONTROLS, | |
1781 | vmcs_read32(VM_ENTRY_CONTROLS) | | |
1782 | VM_ENTRY_IA32E_MODE); | |
1783 | msr->data = efer; | |
1784 | } else { | |
1785 | vmcs_write32(VM_ENTRY_CONTROLS, | |
1786 | vmcs_read32(VM_ENTRY_CONTROLS) & | |
1787 | ~VM_ENTRY_IA32E_MODE); | |
1788 | ||
1789 | msr->data = efer & ~EFER_LME; | |
1790 | } | |
1791 | setup_msrs(vmx); | |
1792 | } | |
1793 | ||
05b3e0c2 | 1794 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
1795 | |
1796 | static void enter_lmode(struct kvm_vcpu *vcpu) | |
1797 | { | |
1798 | u32 guest_tr_ar; | |
1799 | ||
1800 | guest_tr_ar = vmcs_read32(GUEST_TR_AR_BYTES); | |
1801 | if ((guest_tr_ar & AR_TYPE_MASK) != AR_TYPE_BUSY_64_TSS) { | |
1802 | printk(KERN_DEBUG "%s: tss fixup for long mode. \n", | |
b8688d51 | 1803 | __func__); |
6aa8b732 AK |
1804 | vmcs_write32(GUEST_TR_AR_BYTES, |
1805 | (guest_tr_ar & ~AR_TYPE_MASK) | |
1806 | | AR_TYPE_BUSY_64_TSS); | |
1807 | } | |
da38f438 | 1808 | vmx_set_efer(vcpu, vcpu->arch.efer | EFER_LMA); |
6aa8b732 AK |
1809 | } |
1810 | ||
1811 | static void exit_lmode(struct kvm_vcpu *vcpu) | |
1812 | { | |
6aa8b732 AK |
1813 | vmcs_write32(VM_ENTRY_CONTROLS, |
1814 | vmcs_read32(VM_ENTRY_CONTROLS) | |
1e4e6e00 | 1815 | & ~VM_ENTRY_IA32E_MODE); |
da38f438 | 1816 | vmx_set_efer(vcpu, vcpu->arch.efer & ~EFER_LMA); |
6aa8b732 AK |
1817 | } |
1818 | ||
1819 | #endif | |
1820 | ||
2384d2b3 SY |
1821 | static void vmx_flush_tlb(struct kvm_vcpu *vcpu) |
1822 | { | |
b9d762fa | 1823 | vpid_sync_context(to_vmx(vcpu)); |
dd180b3e XG |
1824 | if (enable_ept) { |
1825 | if (!VALID_PAGE(vcpu->arch.mmu.root_hpa)) | |
1826 | return; | |
4e1096d2 | 1827 | ept_sync_context(construct_eptp(vcpu->arch.mmu.root_hpa)); |
dd180b3e | 1828 | } |
2384d2b3 SY |
1829 | } |
1830 | ||
e8467fda AK |
1831 | static void vmx_decache_cr0_guest_bits(struct kvm_vcpu *vcpu) |
1832 | { | |
1833 | ulong cr0_guest_owned_bits = vcpu->arch.cr0_guest_owned_bits; | |
1834 | ||
1835 | vcpu->arch.cr0 &= ~cr0_guest_owned_bits; | |
1836 | vcpu->arch.cr0 |= vmcs_readl(GUEST_CR0) & cr0_guest_owned_bits; | |
1837 | } | |
1838 | ||
25c4c276 | 1839 | static void vmx_decache_cr4_guest_bits(struct kvm_vcpu *vcpu) |
399badf3 | 1840 | { |
fc78f519 AK |
1841 | ulong cr4_guest_owned_bits = vcpu->arch.cr4_guest_owned_bits; |
1842 | ||
1843 | vcpu->arch.cr4 &= ~cr4_guest_owned_bits; | |
1844 | vcpu->arch.cr4 |= vmcs_readl(GUEST_CR4) & cr4_guest_owned_bits; | |
399badf3 AK |
1845 | } |
1846 | ||
1439442c SY |
1847 | static void ept_load_pdptrs(struct kvm_vcpu *vcpu) |
1848 | { | |
6de4f3ad AK |
1849 | if (!test_bit(VCPU_EXREG_PDPTR, |
1850 | (unsigned long *)&vcpu->arch.regs_dirty)) | |
1851 | return; | |
1852 | ||
1439442c | 1853 | if (is_paging(vcpu) && is_pae(vcpu) && !is_long_mode(vcpu)) { |
ff03a073 JR |
1854 | vmcs_write64(GUEST_PDPTR0, vcpu->arch.mmu.pdptrs[0]); |
1855 | vmcs_write64(GUEST_PDPTR1, vcpu->arch.mmu.pdptrs[1]); | |
1856 | vmcs_write64(GUEST_PDPTR2, vcpu->arch.mmu.pdptrs[2]); | |
1857 | vmcs_write64(GUEST_PDPTR3, vcpu->arch.mmu.pdptrs[3]); | |
1439442c SY |
1858 | } |
1859 | } | |
1860 | ||
8f5d549f AK |
1861 | static void ept_save_pdptrs(struct kvm_vcpu *vcpu) |
1862 | { | |
1863 | if (is_paging(vcpu) && is_pae(vcpu) && !is_long_mode(vcpu)) { | |
ff03a073 JR |
1864 | vcpu->arch.mmu.pdptrs[0] = vmcs_read64(GUEST_PDPTR0); |
1865 | vcpu->arch.mmu.pdptrs[1] = vmcs_read64(GUEST_PDPTR1); | |
1866 | vcpu->arch.mmu.pdptrs[2] = vmcs_read64(GUEST_PDPTR2); | |
1867 | vcpu->arch.mmu.pdptrs[3] = vmcs_read64(GUEST_PDPTR3); | |
8f5d549f | 1868 | } |
6de4f3ad AK |
1869 | |
1870 | __set_bit(VCPU_EXREG_PDPTR, | |
1871 | (unsigned long *)&vcpu->arch.regs_avail); | |
1872 | __set_bit(VCPU_EXREG_PDPTR, | |
1873 | (unsigned long *)&vcpu->arch.regs_dirty); | |
8f5d549f AK |
1874 | } |
1875 | ||
1439442c SY |
1876 | static void vmx_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4); |
1877 | ||
1878 | static void ept_update_paging_mode_cr0(unsigned long *hw_cr0, | |
1879 | unsigned long cr0, | |
1880 | struct kvm_vcpu *vcpu) | |
1881 | { | |
1882 | if (!(cr0 & X86_CR0_PG)) { | |
1883 | /* From paging/starting to nonpaging */ | |
1884 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, | |
65267ea1 | 1885 | vmcs_read32(CPU_BASED_VM_EXEC_CONTROL) | |
1439442c SY |
1886 | (CPU_BASED_CR3_LOAD_EXITING | |
1887 | CPU_BASED_CR3_STORE_EXITING)); | |
1888 | vcpu->arch.cr0 = cr0; | |
fc78f519 | 1889 | vmx_set_cr4(vcpu, kvm_read_cr4(vcpu)); |
1439442c SY |
1890 | } else if (!is_paging(vcpu)) { |
1891 | /* From nonpaging to paging */ | |
1892 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, | |
65267ea1 | 1893 | vmcs_read32(CPU_BASED_VM_EXEC_CONTROL) & |
1439442c SY |
1894 | ~(CPU_BASED_CR3_LOAD_EXITING | |
1895 | CPU_BASED_CR3_STORE_EXITING)); | |
1896 | vcpu->arch.cr0 = cr0; | |
fc78f519 | 1897 | vmx_set_cr4(vcpu, kvm_read_cr4(vcpu)); |
1439442c | 1898 | } |
95eb84a7 SY |
1899 | |
1900 | if (!(cr0 & X86_CR0_WP)) | |
1901 | *hw_cr0 &= ~X86_CR0_WP; | |
1439442c SY |
1902 | } |
1903 | ||
6aa8b732 AK |
1904 | static void vmx_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) |
1905 | { | |
7ffd92c5 | 1906 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
3a624e29 NK |
1907 | unsigned long hw_cr0; |
1908 | ||
1909 | if (enable_unrestricted_guest) | |
1910 | hw_cr0 = (cr0 & ~KVM_GUEST_CR0_MASK_UNRESTRICTED_GUEST) | |
1911 | | KVM_VM_CR0_ALWAYS_ON_UNRESTRICTED_GUEST; | |
1912 | else | |
1913 | hw_cr0 = (cr0 & ~KVM_GUEST_CR0_MASK) | KVM_VM_CR0_ALWAYS_ON; | |
1439442c | 1914 | |
7ffd92c5 | 1915 | if (vmx->rmode.vm86_active && (cr0 & X86_CR0_PE)) |
6aa8b732 AK |
1916 | enter_pmode(vcpu); |
1917 | ||
7ffd92c5 | 1918 | if (!vmx->rmode.vm86_active && !(cr0 & X86_CR0_PE)) |
6aa8b732 AK |
1919 | enter_rmode(vcpu); |
1920 | ||
05b3e0c2 | 1921 | #ifdef CONFIG_X86_64 |
f6801dff | 1922 | if (vcpu->arch.efer & EFER_LME) { |
707d92fa | 1923 | if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) |
6aa8b732 | 1924 | enter_lmode(vcpu); |
707d92fa | 1925 | if (is_paging(vcpu) && !(cr0 & X86_CR0_PG)) |
6aa8b732 AK |
1926 | exit_lmode(vcpu); |
1927 | } | |
1928 | #endif | |
1929 | ||
089d034e | 1930 | if (enable_ept) |
1439442c SY |
1931 | ept_update_paging_mode_cr0(&hw_cr0, cr0, vcpu); |
1932 | ||
02daab21 | 1933 | if (!vcpu->fpu_active) |
81231c69 | 1934 | hw_cr0 |= X86_CR0_TS | X86_CR0_MP; |
02daab21 | 1935 | |
6aa8b732 | 1936 | vmcs_writel(CR0_READ_SHADOW, cr0); |
1439442c | 1937 | vmcs_writel(GUEST_CR0, hw_cr0); |
ad312c7c | 1938 | vcpu->arch.cr0 = cr0; |
6aa8b732 AK |
1939 | } |
1940 | ||
1439442c SY |
1941 | static u64 construct_eptp(unsigned long root_hpa) |
1942 | { | |
1943 | u64 eptp; | |
1944 | ||
1945 | /* TODO write the value reading from MSR */ | |
1946 | eptp = VMX_EPT_DEFAULT_MT | | |
1947 | VMX_EPT_DEFAULT_GAW << VMX_EPT_GAW_EPTP_SHIFT; | |
1948 | eptp |= (root_hpa & PAGE_MASK); | |
1949 | ||
1950 | return eptp; | |
1951 | } | |
1952 | ||
6aa8b732 AK |
1953 | static void vmx_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3) |
1954 | { | |
1439442c SY |
1955 | unsigned long guest_cr3; |
1956 | u64 eptp; | |
1957 | ||
1958 | guest_cr3 = cr3; | |
089d034e | 1959 | if (enable_ept) { |
1439442c SY |
1960 | eptp = construct_eptp(cr3); |
1961 | vmcs_write64(EPT_POINTER, eptp); | |
1439442c | 1962 | guest_cr3 = is_paging(vcpu) ? vcpu->arch.cr3 : |
b927a3ce | 1963 | vcpu->kvm->arch.ept_identity_map_addr; |
7c93be44 | 1964 | ept_load_pdptrs(vcpu); |
1439442c SY |
1965 | } |
1966 | ||
2384d2b3 | 1967 | vmx_flush_tlb(vcpu); |
1439442c | 1968 | vmcs_writel(GUEST_CR3, guest_cr3); |
6aa8b732 AK |
1969 | } |
1970 | ||
1971 | static void vmx_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4) | |
1972 | { | |
7ffd92c5 | 1973 | unsigned long hw_cr4 = cr4 | (to_vmx(vcpu)->rmode.vm86_active ? |
1439442c SY |
1974 | KVM_RMODE_VM_CR4_ALWAYS_ON : KVM_PMODE_VM_CR4_ALWAYS_ON); |
1975 | ||
ad312c7c | 1976 | vcpu->arch.cr4 = cr4; |
bc23008b AK |
1977 | if (enable_ept) { |
1978 | if (!is_paging(vcpu)) { | |
1979 | hw_cr4 &= ~X86_CR4_PAE; | |
1980 | hw_cr4 |= X86_CR4_PSE; | |
1981 | } else if (!(cr4 & X86_CR4_PAE)) { | |
1982 | hw_cr4 &= ~X86_CR4_PAE; | |
1983 | } | |
1984 | } | |
1439442c SY |
1985 | |
1986 | vmcs_writel(CR4_READ_SHADOW, cr4); | |
1987 | vmcs_writel(GUEST_CR4, hw_cr4); | |
6aa8b732 AK |
1988 | } |
1989 | ||
6aa8b732 AK |
1990 | static u64 vmx_get_segment_base(struct kvm_vcpu *vcpu, int seg) |
1991 | { | |
1992 | struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; | |
1993 | ||
1994 | return vmcs_readl(sf->base); | |
1995 | } | |
1996 | ||
1997 | static void vmx_get_segment(struct kvm_vcpu *vcpu, | |
1998 | struct kvm_segment *var, int seg) | |
1999 | { | |
2000 | struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; | |
2001 | u32 ar; | |
2002 | ||
2003 | var->base = vmcs_readl(sf->base); | |
2004 | var->limit = vmcs_read32(sf->limit); | |
2005 | var->selector = vmcs_read16(sf->selector); | |
2006 | ar = vmcs_read32(sf->ar_bytes); | |
9fd4a3b7 | 2007 | if ((ar & AR_UNUSABLE_MASK) && !emulate_invalid_guest_state) |
6aa8b732 AK |
2008 | ar = 0; |
2009 | var->type = ar & 15; | |
2010 | var->s = (ar >> 4) & 1; | |
2011 | var->dpl = (ar >> 5) & 3; | |
2012 | var->present = (ar >> 7) & 1; | |
2013 | var->avl = (ar >> 12) & 1; | |
2014 | var->l = (ar >> 13) & 1; | |
2015 | var->db = (ar >> 14) & 1; | |
2016 | var->g = (ar >> 15) & 1; | |
2017 | var->unusable = (ar >> 16) & 1; | |
2018 | } | |
2019 | ||
2e4d2653 IE |
2020 | static int vmx_get_cpl(struct kvm_vcpu *vcpu) |
2021 | { | |
3eeb3288 | 2022 | if (!is_protmode(vcpu)) |
2e4d2653 IE |
2023 | return 0; |
2024 | ||
2025 | if (vmx_get_rflags(vcpu) & X86_EFLAGS_VM) /* if virtual 8086 */ | |
2026 | return 3; | |
2027 | ||
eab4b8aa | 2028 | return vmcs_read16(GUEST_CS_SELECTOR) & 3; |
2e4d2653 IE |
2029 | } |
2030 | ||
653e3108 | 2031 | static u32 vmx_segment_access_rights(struct kvm_segment *var) |
6aa8b732 | 2032 | { |
6aa8b732 AK |
2033 | u32 ar; |
2034 | ||
653e3108 | 2035 | if (var->unusable) |
6aa8b732 AK |
2036 | ar = 1 << 16; |
2037 | else { | |
2038 | ar = var->type & 15; | |
2039 | ar |= (var->s & 1) << 4; | |
2040 | ar |= (var->dpl & 3) << 5; | |
2041 | ar |= (var->present & 1) << 7; | |
2042 | ar |= (var->avl & 1) << 12; | |
2043 | ar |= (var->l & 1) << 13; | |
2044 | ar |= (var->db & 1) << 14; | |
2045 | ar |= (var->g & 1) << 15; | |
2046 | } | |
f7fbf1fd UL |
2047 | if (ar == 0) /* a 0 value means unusable */ |
2048 | ar = AR_UNUSABLE_MASK; | |
653e3108 AK |
2049 | |
2050 | return ar; | |
2051 | } | |
2052 | ||
2053 | static void vmx_set_segment(struct kvm_vcpu *vcpu, | |
2054 | struct kvm_segment *var, int seg) | |
2055 | { | |
7ffd92c5 | 2056 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
653e3108 AK |
2057 | struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; |
2058 | u32 ar; | |
2059 | ||
7ffd92c5 AK |
2060 | if (vmx->rmode.vm86_active && seg == VCPU_SREG_TR) { |
2061 | vmx->rmode.tr.selector = var->selector; | |
2062 | vmx->rmode.tr.base = var->base; | |
2063 | vmx->rmode.tr.limit = var->limit; | |
2064 | vmx->rmode.tr.ar = vmx_segment_access_rights(var); | |
653e3108 AK |
2065 | return; |
2066 | } | |
2067 | vmcs_writel(sf->base, var->base); | |
2068 | vmcs_write32(sf->limit, var->limit); | |
2069 | vmcs_write16(sf->selector, var->selector); | |
7ffd92c5 | 2070 | if (vmx->rmode.vm86_active && var->s) { |
653e3108 AK |
2071 | /* |
2072 | * Hack real-mode segments into vm86 compatibility. | |
2073 | */ | |
2074 | if (var->base == 0xffff0000 && var->selector == 0xf000) | |
2075 | vmcs_writel(sf->base, 0xf0000); | |
2076 | ar = 0xf3; | |
2077 | } else | |
2078 | ar = vmx_segment_access_rights(var); | |
3a624e29 NK |
2079 | |
2080 | /* | |
2081 | * Fix the "Accessed" bit in AR field of segment registers for older | |
2082 | * qemu binaries. | |
2083 | * IA32 arch specifies that at the time of processor reset the | |
2084 | * "Accessed" bit in the AR field of segment registers is 1. And qemu | |
2085 | * is setting it to 0 in the usedland code. This causes invalid guest | |
2086 | * state vmexit when "unrestricted guest" mode is turned on. | |
2087 | * Fix for this setup issue in cpu_reset is being pushed in the qemu | |
2088 | * tree. Newer qemu binaries with that qemu fix would not need this | |
2089 | * kvm hack. | |
2090 | */ | |
2091 | if (enable_unrestricted_guest && (seg != VCPU_SREG_LDTR)) | |
2092 | ar |= 0x1; /* Accessed */ | |
2093 | ||
6aa8b732 AK |
2094 | vmcs_write32(sf->ar_bytes, ar); |
2095 | } | |
2096 | ||
6aa8b732 AK |
2097 | static void vmx_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l) |
2098 | { | |
2099 | u32 ar = vmcs_read32(GUEST_CS_AR_BYTES); | |
2100 | ||
2101 | *db = (ar >> 14) & 1; | |
2102 | *l = (ar >> 13) & 1; | |
2103 | } | |
2104 | ||
89a27f4d | 2105 | static void vmx_get_idt(struct kvm_vcpu *vcpu, struct desc_ptr *dt) |
6aa8b732 | 2106 | { |
89a27f4d GN |
2107 | dt->size = vmcs_read32(GUEST_IDTR_LIMIT); |
2108 | dt->address = vmcs_readl(GUEST_IDTR_BASE); | |
6aa8b732 AK |
2109 | } |
2110 | ||
89a27f4d | 2111 | static void vmx_set_idt(struct kvm_vcpu *vcpu, struct desc_ptr *dt) |
6aa8b732 | 2112 | { |
89a27f4d GN |
2113 | vmcs_write32(GUEST_IDTR_LIMIT, dt->size); |
2114 | vmcs_writel(GUEST_IDTR_BASE, dt->address); | |
6aa8b732 AK |
2115 | } |
2116 | ||
89a27f4d | 2117 | static void vmx_get_gdt(struct kvm_vcpu *vcpu, struct desc_ptr *dt) |
6aa8b732 | 2118 | { |
89a27f4d GN |
2119 | dt->size = vmcs_read32(GUEST_GDTR_LIMIT); |
2120 | dt->address = vmcs_readl(GUEST_GDTR_BASE); | |
6aa8b732 AK |
2121 | } |
2122 | ||
89a27f4d | 2123 | static void vmx_set_gdt(struct kvm_vcpu *vcpu, struct desc_ptr *dt) |
6aa8b732 | 2124 | { |
89a27f4d GN |
2125 | vmcs_write32(GUEST_GDTR_LIMIT, dt->size); |
2126 | vmcs_writel(GUEST_GDTR_BASE, dt->address); | |
6aa8b732 AK |
2127 | } |
2128 | ||
648dfaa7 MG |
2129 | static bool rmode_segment_valid(struct kvm_vcpu *vcpu, int seg) |
2130 | { | |
2131 | struct kvm_segment var; | |
2132 | u32 ar; | |
2133 | ||
2134 | vmx_get_segment(vcpu, &var, seg); | |
2135 | ar = vmx_segment_access_rights(&var); | |
2136 | ||
2137 | if (var.base != (var.selector << 4)) | |
2138 | return false; | |
2139 | if (var.limit != 0xffff) | |
2140 | return false; | |
2141 | if (ar != 0xf3) | |
2142 | return false; | |
2143 | ||
2144 | return true; | |
2145 | } | |
2146 | ||
2147 | static bool code_segment_valid(struct kvm_vcpu *vcpu) | |
2148 | { | |
2149 | struct kvm_segment cs; | |
2150 | unsigned int cs_rpl; | |
2151 | ||
2152 | vmx_get_segment(vcpu, &cs, VCPU_SREG_CS); | |
2153 | cs_rpl = cs.selector & SELECTOR_RPL_MASK; | |
2154 | ||
1872a3f4 AK |
2155 | if (cs.unusable) |
2156 | return false; | |
648dfaa7 MG |
2157 | if (~cs.type & (AR_TYPE_CODE_MASK|AR_TYPE_ACCESSES_MASK)) |
2158 | return false; | |
2159 | if (!cs.s) | |
2160 | return false; | |
1872a3f4 | 2161 | if (cs.type & AR_TYPE_WRITEABLE_MASK) { |
648dfaa7 MG |
2162 | if (cs.dpl > cs_rpl) |
2163 | return false; | |
1872a3f4 | 2164 | } else { |
648dfaa7 MG |
2165 | if (cs.dpl != cs_rpl) |
2166 | return false; | |
2167 | } | |
2168 | if (!cs.present) | |
2169 | return false; | |
2170 | ||
2171 | /* TODO: Add Reserved field check, this'll require a new member in the kvm_segment_field structure */ | |
2172 | return true; | |
2173 | } | |
2174 | ||
2175 | static bool stack_segment_valid(struct kvm_vcpu *vcpu) | |
2176 | { | |
2177 | struct kvm_segment ss; | |
2178 | unsigned int ss_rpl; | |
2179 | ||
2180 | vmx_get_segment(vcpu, &ss, VCPU_SREG_SS); | |
2181 | ss_rpl = ss.selector & SELECTOR_RPL_MASK; | |
2182 | ||
1872a3f4 AK |
2183 | if (ss.unusable) |
2184 | return true; | |
2185 | if (ss.type != 3 && ss.type != 7) | |
648dfaa7 MG |
2186 | return false; |
2187 | if (!ss.s) | |
2188 | return false; | |
2189 | if (ss.dpl != ss_rpl) /* DPL != RPL */ | |
2190 | return false; | |
2191 | if (!ss.present) | |
2192 | return false; | |
2193 | ||
2194 | return true; | |
2195 | } | |
2196 | ||
2197 | static bool data_segment_valid(struct kvm_vcpu *vcpu, int seg) | |
2198 | { | |
2199 | struct kvm_segment var; | |
2200 | unsigned int rpl; | |
2201 | ||
2202 | vmx_get_segment(vcpu, &var, seg); | |
2203 | rpl = var.selector & SELECTOR_RPL_MASK; | |
2204 | ||
1872a3f4 AK |
2205 | if (var.unusable) |
2206 | return true; | |
648dfaa7 MG |
2207 | if (!var.s) |
2208 | return false; | |
2209 | if (!var.present) | |
2210 | return false; | |
2211 | if (~var.type & (AR_TYPE_CODE_MASK|AR_TYPE_WRITEABLE_MASK)) { | |
2212 | if (var.dpl < rpl) /* DPL < RPL */ | |
2213 | return false; | |
2214 | } | |
2215 | ||
2216 | /* TODO: Add other members to kvm_segment_field to allow checking for other access | |
2217 | * rights flags | |
2218 | */ | |
2219 | return true; | |
2220 | } | |
2221 | ||
2222 | static bool tr_valid(struct kvm_vcpu *vcpu) | |
2223 | { | |
2224 | struct kvm_segment tr; | |
2225 | ||
2226 | vmx_get_segment(vcpu, &tr, VCPU_SREG_TR); | |
2227 | ||
1872a3f4 AK |
2228 | if (tr.unusable) |
2229 | return false; | |
648dfaa7 MG |
2230 | if (tr.selector & SELECTOR_TI_MASK) /* TI = 1 */ |
2231 | return false; | |
1872a3f4 | 2232 | if (tr.type != 3 && tr.type != 11) /* TODO: Check if guest is in IA32e mode */ |
648dfaa7 MG |
2233 | return false; |
2234 | if (!tr.present) | |
2235 | return false; | |
2236 | ||
2237 | return true; | |
2238 | } | |
2239 | ||
2240 | static bool ldtr_valid(struct kvm_vcpu *vcpu) | |
2241 | { | |
2242 | struct kvm_segment ldtr; | |
2243 | ||
2244 | vmx_get_segment(vcpu, &ldtr, VCPU_SREG_LDTR); | |
2245 | ||
1872a3f4 AK |
2246 | if (ldtr.unusable) |
2247 | return true; | |
648dfaa7 MG |
2248 | if (ldtr.selector & SELECTOR_TI_MASK) /* TI = 1 */ |
2249 | return false; | |
2250 | if (ldtr.type != 2) | |
2251 | return false; | |
2252 | if (!ldtr.present) | |
2253 | return false; | |
2254 | ||
2255 | return true; | |
2256 | } | |
2257 | ||
2258 | static bool cs_ss_rpl_check(struct kvm_vcpu *vcpu) | |
2259 | { | |
2260 | struct kvm_segment cs, ss; | |
2261 | ||
2262 | vmx_get_segment(vcpu, &cs, VCPU_SREG_CS); | |
2263 | vmx_get_segment(vcpu, &ss, VCPU_SREG_SS); | |
2264 | ||
2265 | return ((cs.selector & SELECTOR_RPL_MASK) == | |
2266 | (ss.selector & SELECTOR_RPL_MASK)); | |
2267 | } | |
2268 | ||
2269 | /* | |
2270 | * Check if guest state is valid. Returns true if valid, false if | |
2271 | * not. | |
2272 | * We assume that registers are always usable | |
2273 | */ | |
2274 | static bool guest_state_valid(struct kvm_vcpu *vcpu) | |
2275 | { | |
2276 | /* real mode guest state checks */ | |
3eeb3288 | 2277 | if (!is_protmode(vcpu)) { |
648dfaa7 MG |
2278 | if (!rmode_segment_valid(vcpu, VCPU_SREG_CS)) |
2279 | return false; | |
2280 | if (!rmode_segment_valid(vcpu, VCPU_SREG_SS)) | |
2281 | return false; | |
2282 | if (!rmode_segment_valid(vcpu, VCPU_SREG_DS)) | |
2283 | return false; | |
2284 | if (!rmode_segment_valid(vcpu, VCPU_SREG_ES)) | |
2285 | return false; | |
2286 | if (!rmode_segment_valid(vcpu, VCPU_SREG_FS)) | |
2287 | return false; | |
2288 | if (!rmode_segment_valid(vcpu, VCPU_SREG_GS)) | |
2289 | return false; | |
2290 | } else { | |
2291 | /* protected mode guest state checks */ | |
2292 | if (!cs_ss_rpl_check(vcpu)) | |
2293 | return false; | |
2294 | if (!code_segment_valid(vcpu)) | |
2295 | return false; | |
2296 | if (!stack_segment_valid(vcpu)) | |
2297 | return false; | |
2298 | if (!data_segment_valid(vcpu, VCPU_SREG_DS)) | |
2299 | return false; | |
2300 | if (!data_segment_valid(vcpu, VCPU_SREG_ES)) | |
2301 | return false; | |
2302 | if (!data_segment_valid(vcpu, VCPU_SREG_FS)) | |
2303 | return false; | |
2304 | if (!data_segment_valid(vcpu, VCPU_SREG_GS)) | |
2305 | return false; | |
2306 | if (!tr_valid(vcpu)) | |
2307 | return false; | |
2308 | if (!ldtr_valid(vcpu)) | |
2309 | return false; | |
2310 | } | |
2311 | /* TODO: | |
2312 | * - Add checks on RIP | |
2313 | * - Add checks on RFLAGS | |
2314 | */ | |
2315 | ||
2316 | return true; | |
2317 | } | |
2318 | ||
d77c26fc | 2319 | static int init_rmode_tss(struct kvm *kvm) |
6aa8b732 | 2320 | { |
6aa8b732 | 2321 | gfn_t fn = rmode_tss_base(kvm) >> PAGE_SHIFT; |
195aefde | 2322 | u16 data = 0; |
10589a46 | 2323 | int ret = 0; |
195aefde | 2324 | int r; |
6aa8b732 | 2325 | |
195aefde IE |
2326 | r = kvm_clear_guest_page(kvm, fn, 0, PAGE_SIZE); |
2327 | if (r < 0) | |
10589a46 | 2328 | goto out; |
195aefde | 2329 | data = TSS_BASE_SIZE + TSS_REDIRECTION_SIZE; |
464d17c8 SY |
2330 | r = kvm_write_guest_page(kvm, fn++, &data, |
2331 | TSS_IOPB_BASE_OFFSET, sizeof(u16)); | |
195aefde | 2332 | if (r < 0) |
10589a46 | 2333 | goto out; |
195aefde IE |
2334 | r = kvm_clear_guest_page(kvm, fn++, 0, PAGE_SIZE); |
2335 | if (r < 0) | |
10589a46 | 2336 | goto out; |
195aefde IE |
2337 | r = kvm_clear_guest_page(kvm, fn, 0, PAGE_SIZE); |
2338 | if (r < 0) | |
10589a46 | 2339 | goto out; |
195aefde | 2340 | data = ~0; |
10589a46 MT |
2341 | r = kvm_write_guest_page(kvm, fn, &data, |
2342 | RMODE_TSS_SIZE - 2 * PAGE_SIZE - 1, | |
2343 | sizeof(u8)); | |
195aefde | 2344 | if (r < 0) |
10589a46 MT |
2345 | goto out; |
2346 | ||
2347 | ret = 1; | |
2348 | out: | |
10589a46 | 2349 | return ret; |
6aa8b732 AK |
2350 | } |
2351 | ||
b7ebfb05 SY |
2352 | static int init_rmode_identity_map(struct kvm *kvm) |
2353 | { | |
2354 | int i, r, ret; | |
2355 | pfn_t identity_map_pfn; | |
2356 | u32 tmp; | |
2357 | ||
089d034e | 2358 | if (!enable_ept) |
b7ebfb05 SY |
2359 | return 1; |
2360 | if (unlikely(!kvm->arch.ept_identity_pagetable)) { | |
2361 | printk(KERN_ERR "EPT: identity-mapping pagetable " | |
2362 | "haven't been allocated!\n"); | |
2363 | return 0; | |
2364 | } | |
2365 | if (likely(kvm->arch.ept_identity_pagetable_done)) | |
2366 | return 1; | |
2367 | ret = 0; | |
b927a3ce | 2368 | identity_map_pfn = kvm->arch.ept_identity_map_addr >> PAGE_SHIFT; |
b7ebfb05 SY |
2369 | r = kvm_clear_guest_page(kvm, identity_map_pfn, 0, PAGE_SIZE); |
2370 | if (r < 0) | |
2371 | goto out; | |
2372 | /* Set up identity-mapping pagetable for EPT in real mode */ | |
2373 | for (i = 0; i < PT32_ENT_PER_PAGE; i++) { | |
2374 | tmp = (i << 22) + (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | | |
2375 | _PAGE_ACCESSED | _PAGE_DIRTY | _PAGE_PSE); | |
2376 | r = kvm_write_guest_page(kvm, identity_map_pfn, | |
2377 | &tmp, i * sizeof(tmp), sizeof(tmp)); | |
2378 | if (r < 0) | |
2379 | goto out; | |
2380 | } | |
2381 | kvm->arch.ept_identity_pagetable_done = true; | |
2382 | ret = 1; | |
2383 | out: | |
2384 | return ret; | |
2385 | } | |
2386 | ||
6aa8b732 AK |
2387 | static void seg_setup(int seg) |
2388 | { | |
2389 | struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; | |
3a624e29 | 2390 | unsigned int ar; |
6aa8b732 AK |
2391 | |
2392 | vmcs_write16(sf->selector, 0); | |
2393 | vmcs_writel(sf->base, 0); | |
2394 | vmcs_write32(sf->limit, 0xffff); | |
3a624e29 NK |
2395 | if (enable_unrestricted_guest) { |
2396 | ar = 0x93; | |
2397 | if (seg == VCPU_SREG_CS) | |
2398 | ar |= 0x08; /* code segment */ | |
2399 | } else | |
2400 | ar = 0xf3; | |
2401 | ||
2402 | vmcs_write32(sf->ar_bytes, ar); | |
6aa8b732 AK |
2403 | } |
2404 | ||
f78e0e2e SY |
2405 | static int alloc_apic_access_page(struct kvm *kvm) |
2406 | { | |
2407 | struct kvm_userspace_memory_region kvm_userspace_mem; | |
2408 | int r = 0; | |
2409 | ||
79fac95e | 2410 | mutex_lock(&kvm->slots_lock); |
bfc6d222 | 2411 | if (kvm->arch.apic_access_page) |
f78e0e2e SY |
2412 | goto out; |
2413 | kvm_userspace_mem.slot = APIC_ACCESS_PAGE_PRIVATE_MEMSLOT; | |
2414 | kvm_userspace_mem.flags = 0; | |
2415 | kvm_userspace_mem.guest_phys_addr = 0xfee00000ULL; | |
2416 | kvm_userspace_mem.memory_size = PAGE_SIZE; | |
2417 | r = __kvm_set_memory_region(kvm, &kvm_userspace_mem, 0); | |
2418 | if (r) | |
2419 | goto out; | |
72dc67a6 | 2420 | |
bfc6d222 | 2421 | kvm->arch.apic_access_page = gfn_to_page(kvm, 0xfee00); |
f78e0e2e | 2422 | out: |
79fac95e | 2423 | mutex_unlock(&kvm->slots_lock); |
f78e0e2e SY |
2424 | return r; |
2425 | } | |
2426 | ||
b7ebfb05 SY |
2427 | static int alloc_identity_pagetable(struct kvm *kvm) |
2428 | { | |
2429 | struct kvm_userspace_memory_region kvm_userspace_mem; | |
2430 | int r = 0; | |
2431 | ||
79fac95e | 2432 | mutex_lock(&kvm->slots_lock); |
b7ebfb05 SY |
2433 | if (kvm->arch.ept_identity_pagetable) |
2434 | goto out; | |
2435 | kvm_userspace_mem.slot = IDENTITY_PAGETABLE_PRIVATE_MEMSLOT; | |
2436 | kvm_userspace_mem.flags = 0; | |
b927a3ce SY |
2437 | kvm_userspace_mem.guest_phys_addr = |
2438 | kvm->arch.ept_identity_map_addr; | |
b7ebfb05 SY |
2439 | kvm_userspace_mem.memory_size = PAGE_SIZE; |
2440 | r = __kvm_set_memory_region(kvm, &kvm_userspace_mem, 0); | |
2441 | if (r) | |
2442 | goto out; | |
2443 | ||
b7ebfb05 | 2444 | kvm->arch.ept_identity_pagetable = gfn_to_page(kvm, |
b927a3ce | 2445 | kvm->arch.ept_identity_map_addr >> PAGE_SHIFT); |
b7ebfb05 | 2446 | out: |
79fac95e | 2447 | mutex_unlock(&kvm->slots_lock); |
b7ebfb05 SY |
2448 | return r; |
2449 | } | |
2450 | ||
2384d2b3 SY |
2451 | static void allocate_vpid(struct vcpu_vmx *vmx) |
2452 | { | |
2453 | int vpid; | |
2454 | ||
2455 | vmx->vpid = 0; | |
919818ab | 2456 | if (!enable_vpid) |
2384d2b3 SY |
2457 | return; |
2458 | spin_lock(&vmx_vpid_lock); | |
2459 | vpid = find_first_zero_bit(vmx_vpid_bitmap, VMX_NR_VPIDS); | |
2460 | if (vpid < VMX_NR_VPIDS) { | |
2461 | vmx->vpid = vpid; | |
2462 | __set_bit(vpid, vmx_vpid_bitmap); | |
2463 | } | |
2464 | spin_unlock(&vmx_vpid_lock); | |
2465 | } | |
2466 | ||
cdbecfc3 LJ |
2467 | static void free_vpid(struct vcpu_vmx *vmx) |
2468 | { | |
2469 | if (!enable_vpid) | |
2470 | return; | |
2471 | spin_lock(&vmx_vpid_lock); | |
2472 | if (vmx->vpid != 0) | |
2473 | __clear_bit(vmx->vpid, vmx_vpid_bitmap); | |
2474 | spin_unlock(&vmx_vpid_lock); | |
2475 | } | |
2476 | ||
5897297b | 2477 | static void __vmx_disable_intercept_for_msr(unsigned long *msr_bitmap, u32 msr) |
25c5f225 | 2478 | { |
3e7c73e9 | 2479 | int f = sizeof(unsigned long); |
25c5f225 SY |
2480 | |
2481 | if (!cpu_has_vmx_msr_bitmap()) | |
2482 | return; | |
2483 | ||
2484 | /* | |
2485 | * See Intel PRM Vol. 3, 20.6.9 (MSR-Bitmap Address). Early manuals | |
2486 | * have the write-low and read-high bitmap offsets the wrong way round. | |
2487 | * We can control MSRs 0x00000000-0x00001fff and 0xc0000000-0xc0001fff. | |
2488 | */ | |
25c5f225 | 2489 | if (msr <= 0x1fff) { |
3e7c73e9 AK |
2490 | __clear_bit(msr, msr_bitmap + 0x000 / f); /* read-low */ |
2491 | __clear_bit(msr, msr_bitmap + 0x800 / f); /* write-low */ | |
25c5f225 SY |
2492 | } else if ((msr >= 0xc0000000) && (msr <= 0xc0001fff)) { |
2493 | msr &= 0x1fff; | |
3e7c73e9 AK |
2494 | __clear_bit(msr, msr_bitmap + 0x400 / f); /* read-high */ |
2495 | __clear_bit(msr, msr_bitmap + 0xc00 / f); /* write-high */ | |
25c5f225 | 2496 | } |
25c5f225 SY |
2497 | } |
2498 | ||
5897297b AK |
2499 | static void vmx_disable_intercept_for_msr(u32 msr, bool longmode_only) |
2500 | { | |
2501 | if (!longmode_only) | |
2502 | __vmx_disable_intercept_for_msr(vmx_msr_bitmap_legacy, msr); | |
2503 | __vmx_disable_intercept_for_msr(vmx_msr_bitmap_longmode, msr); | |
2504 | } | |
2505 | ||
6aa8b732 AK |
2506 | /* |
2507 | * Sets up the vmcs for emulated real mode. | |
2508 | */ | |
8b9cf98c | 2509 | static int vmx_vcpu_setup(struct vcpu_vmx *vmx) |
6aa8b732 | 2510 | { |
468d472f | 2511 | u32 host_sysenter_cs, msr_low, msr_high; |
6aa8b732 | 2512 | u32 junk; |
f4e1b3c8 | 2513 | u64 host_pat; |
6aa8b732 | 2514 | unsigned long a; |
89a27f4d | 2515 | struct desc_ptr dt; |
6aa8b732 | 2516 | int i; |
cd2276a7 | 2517 | unsigned long kvm_vmx_return; |
6e5d865c | 2518 | u32 exec_control; |
6aa8b732 | 2519 | |
6aa8b732 | 2520 | /* I/O */ |
3e7c73e9 AK |
2521 | vmcs_write64(IO_BITMAP_A, __pa(vmx_io_bitmap_a)); |
2522 | vmcs_write64(IO_BITMAP_B, __pa(vmx_io_bitmap_b)); | |
6aa8b732 | 2523 | |
25c5f225 | 2524 | if (cpu_has_vmx_msr_bitmap()) |
5897297b | 2525 | vmcs_write64(MSR_BITMAP, __pa(vmx_msr_bitmap_legacy)); |
25c5f225 | 2526 | |
6aa8b732 AK |
2527 | vmcs_write64(VMCS_LINK_POINTER, -1ull); /* 22.3.1.5 */ |
2528 | ||
6aa8b732 | 2529 | /* Control */ |
1c3d14fe YS |
2530 | vmcs_write32(PIN_BASED_VM_EXEC_CONTROL, |
2531 | vmcs_config.pin_based_exec_ctrl); | |
6e5d865c YS |
2532 | |
2533 | exec_control = vmcs_config.cpu_based_exec_ctrl; | |
2534 | if (!vm_need_tpr_shadow(vmx->vcpu.kvm)) { | |
2535 | exec_control &= ~CPU_BASED_TPR_SHADOW; | |
2536 | #ifdef CONFIG_X86_64 | |
2537 | exec_control |= CPU_BASED_CR8_STORE_EXITING | | |
2538 | CPU_BASED_CR8_LOAD_EXITING; | |
2539 | #endif | |
2540 | } | |
089d034e | 2541 | if (!enable_ept) |
d56f546d | 2542 | exec_control |= CPU_BASED_CR3_STORE_EXITING | |
83dbc83a MT |
2543 | CPU_BASED_CR3_LOAD_EXITING | |
2544 | CPU_BASED_INVLPG_EXITING; | |
6e5d865c | 2545 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, exec_control); |
6aa8b732 | 2546 | |
83ff3b9d SY |
2547 | if (cpu_has_secondary_exec_ctrls()) { |
2548 | exec_control = vmcs_config.cpu_based_2nd_exec_ctrl; | |
2549 | if (!vm_need_virtualize_apic_accesses(vmx->vcpu.kvm)) | |
2550 | exec_control &= | |
2551 | ~SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES; | |
2384d2b3 SY |
2552 | if (vmx->vpid == 0) |
2553 | exec_control &= ~SECONDARY_EXEC_ENABLE_VPID; | |
046d8710 | 2554 | if (!enable_ept) { |
d56f546d | 2555 | exec_control &= ~SECONDARY_EXEC_ENABLE_EPT; |
046d8710 SY |
2556 | enable_unrestricted_guest = 0; |
2557 | } | |
3a624e29 NK |
2558 | if (!enable_unrestricted_guest) |
2559 | exec_control &= ~SECONDARY_EXEC_UNRESTRICTED_GUEST; | |
4b8d54f9 ZE |
2560 | if (!ple_gap) |
2561 | exec_control &= ~SECONDARY_EXEC_PAUSE_LOOP_EXITING; | |
83ff3b9d SY |
2562 | vmcs_write32(SECONDARY_VM_EXEC_CONTROL, exec_control); |
2563 | } | |
f78e0e2e | 2564 | |
4b8d54f9 ZE |
2565 | if (ple_gap) { |
2566 | vmcs_write32(PLE_GAP, ple_gap); | |
2567 | vmcs_write32(PLE_WINDOW, ple_window); | |
2568 | } | |
2569 | ||
c7addb90 AK |
2570 | vmcs_write32(PAGE_FAULT_ERROR_CODE_MASK, !!bypass_guest_pf); |
2571 | vmcs_write32(PAGE_FAULT_ERROR_CODE_MATCH, !!bypass_guest_pf); | |
6aa8b732 AK |
2572 | vmcs_write32(CR3_TARGET_COUNT, 0); /* 22.2.1 */ |
2573 | ||
1c11e713 | 2574 | vmcs_writel(HOST_CR0, read_cr0() | X86_CR0_TS); /* 22.2.3 */ |
6aa8b732 AK |
2575 | vmcs_writel(HOST_CR4, read_cr4()); /* 22.2.3, 22.2.5 */ |
2576 | vmcs_writel(HOST_CR3, read_cr3()); /* 22.2.3 FIXME: shadow tables */ | |
2577 | ||
2578 | vmcs_write16(HOST_CS_SELECTOR, __KERNEL_CS); /* 22.2.4 */ | |
2579 | vmcs_write16(HOST_DS_SELECTOR, __KERNEL_DS); /* 22.2.4 */ | |
2580 | vmcs_write16(HOST_ES_SELECTOR, __KERNEL_DS); /* 22.2.4 */ | |
9581d442 AK |
2581 | vmcs_write16(HOST_FS_SELECTOR, 0); /* 22.2.4 */ |
2582 | vmcs_write16(HOST_GS_SELECTOR, 0); /* 22.2.4 */ | |
6aa8b732 | 2583 | vmcs_write16(HOST_SS_SELECTOR, __KERNEL_DS); /* 22.2.4 */ |
05b3e0c2 | 2584 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
2585 | rdmsrl(MSR_FS_BASE, a); |
2586 | vmcs_writel(HOST_FS_BASE, a); /* 22.2.4 */ | |
2587 | rdmsrl(MSR_GS_BASE, a); | |
2588 | vmcs_writel(HOST_GS_BASE, a); /* 22.2.4 */ | |
2589 | #else | |
2590 | vmcs_writel(HOST_FS_BASE, 0); /* 22.2.4 */ | |
2591 | vmcs_writel(HOST_GS_BASE, 0); /* 22.2.4 */ | |
2592 | #endif | |
2593 | ||
2594 | vmcs_write16(HOST_TR_SELECTOR, GDT_ENTRY_TSS*8); /* 22.2.4 */ | |
2595 | ||
ec68798c | 2596 | native_store_idt(&dt); |
89a27f4d | 2597 | vmcs_writel(HOST_IDTR_BASE, dt.address); /* 22.2.4 */ |
6aa8b732 | 2598 | |
d77c26fc | 2599 | asm("mov $.Lkvm_vmx_return, %0" : "=r"(kvm_vmx_return)); |
cd2276a7 | 2600 | vmcs_writel(HOST_RIP, kvm_vmx_return); /* 22.2.5 */ |
2cc51560 ED |
2601 | vmcs_write32(VM_EXIT_MSR_STORE_COUNT, 0); |
2602 | vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, 0); | |
61d2ef2c | 2603 | vmcs_write64(VM_EXIT_MSR_LOAD_ADDR, __pa(vmx->msr_autoload.host)); |
2cc51560 | 2604 | vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, 0); |
61d2ef2c | 2605 | vmcs_write64(VM_ENTRY_MSR_LOAD_ADDR, __pa(vmx->msr_autoload.guest)); |
6aa8b732 AK |
2606 | |
2607 | rdmsr(MSR_IA32_SYSENTER_CS, host_sysenter_cs, junk); | |
2608 | vmcs_write32(HOST_IA32_SYSENTER_CS, host_sysenter_cs); | |
2609 | rdmsrl(MSR_IA32_SYSENTER_ESP, a); | |
2610 | vmcs_writel(HOST_IA32_SYSENTER_ESP, a); /* 22.2.3 */ | |
2611 | rdmsrl(MSR_IA32_SYSENTER_EIP, a); | |
2612 | vmcs_writel(HOST_IA32_SYSENTER_EIP, a); /* 22.2.3 */ | |
2613 | ||
468d472f SY |
2614 | if (vmcs_config.vmexit_ctrl & VM_EXIT_LOAD_IA32_PAT) { |
2615 | rdmsr(MSR_IA32_CR_PAT, msr_low, msr_high); | |
2616 | host_pat = msr_low | ((u64) msr_high << 32); | |
2617 | vmcs_write64(HOST_IA32_PAT, host_pat); | |
2618 | } | |
2619 | if (vmcs_config.vmentry_ctrl & VM_ENTRY_LOAD_IA32_PAT) { | |
2620 | rdmsr(MSR_IA32_CR_PAT, msr_low, msr_high); | |
2621 | host_pat = msr_low | ((u64) msr_high << 32); | |
2622 | /* Write the default value follow host pat */ | |
2623 | vmcs_write64(GUEST_IA32_PAT, host_pat); | |
2624 | /* Keep arch.pat sync with GUEST_IA32_PAT */ | |
2625 | vmx->vcpu.arch.pat = host_pat; | |
2626 | } | |
2627 | ||
6aa8b732 AK |
2628 | for (i = 0; i < NR_VMX_MSR; ++i) { |
2629 | u32 index = vmx_msr_index[i]; | |
2630 | u32 data_low, data_high; | |
a2fa3e9f | 2631 | int j = vmx->nmsrs; |
6aa8b732 AK |
2632 | |
2633 | if (rdmsr_safe(index, &data_low, &data_high) < 0) | |
2634 | continue; | |
432bd6cb AK |
2635 | if (wrmsr_safe(index, data_low, data_high) < 0) |
2636 | continue; | |
26bb0981 AK |
2637 | vmx->guest_msrs[j].index = i; |
2638 | vmx->guest_msrs[j].data = 0; | |
d5696725 | 2639 | vmx->guest_msrs[j].mask = -1ull; |
a2fa3e9f | 2640 | ++vmx->nmsrs; |
6aa8b732 | 2641 | } |
6aa8b732 | 2642 | |
1c3d14fe | 2643 | vmcs_write32(VM_EXIT_CONTROLS, vmcs_config.vmexit_ctrl); |
6aa8b732 AK |
2644 | |
2645 | /* 22.2.1, 20.8.1 */ | |
1c3d14fe YS |
2646 | vmcs_write32(VM_ENTRY_CONTROLS, vmcs_config.vmentry_ctrl); |
2647 | ||
e00c8cf2 | 2648 | vmcs_writel(CR0_GUEST_HOST_MASK, ~0UL); |
4c38609a | 2649 | vmx->vcpu.arch.cr4_guest_owned_bits = KVM_CR4_GUEST_OWNED_BITS; |
ce03e4f2 AK |
2650 | if (enable_ept) |
2651 | vmx->vcpu.arch.cr4_guest_owned_bits |= X86_CR4_PGE; | |
4c38609a | 2652 | vmcs_writel(CR4_GUEST_HOST_MASK, ~vmx->vcpu.arch.cr4_guest_owned_bits); |
e00c8cf2 | 2653 | |
99e3e30a | 2654 | kvm_write_tsc(&vmx->vcpu, 0); |
f78e0e2e | 2655 | |
e00c8cf2 AK |
2656 | return 0; |
2657 | } | |
2658 | ||
b7ebfb05 SY |
2659 | static int init_rmode(struct kvm *kvm) |
2660 | { | |
4b9d3a04 XG |
2661 | int idx, ret = 0; |
2662 | ||
2663 | idx = srcu_read_lock(&kvm->srcu); | |
b7ebfb05 | 2664 | if (!init_rmode_tss(kvm)) |
4b9d3a04 | 2665 | goto exit; |
b7ebfb05 | 2666 | if (!init_rmode_identity_map(kvm)) |
4b9d3a04 XG |
2667 | goto exit; |
2668 | ||
2669 | ret = 1; | |
2670 | exit: | |
2671 | srcu_read_unlock(&kvm->srcu, idx); | |
2672 | return ret; | |
b7ebfb05 SY |
2673 | } |
2674 | ||
e00c8cf2 AK |
2675 | static int vmx_vcpu_reset(struct kvm_vcpu *vcpu) |
2676 | { | |
2677 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
2678 | u64 msr; | |
4b9d3a04 | 2679 | int ret; |
e00c8cf2 | 2680 | |
5fdbf976 | 2681 | vcpu->arch.regs_avail = ~((1 << VCPU_REGS_RIP) | (1 << VCPU_REGS_RSP)); |
b7ebfb05 | 2682 | if (!init_rmode(vmx->vcpu.kvm)) { |
e00c8cf2 AK |
2683 | ret = -ENOMEM; |
2684 | goto out; | |
2685 | } | |
2686 | ||
7ffd92c5 | 2687 | vmx->rmode.vm86_active = 0; |
e00c8cf2 | 2688 | |
3b86cd99 JK |
2689 | vmx->soft_vnmi_blocked = 0; |
2690 | ||
ad312c7c | 2691 | vmx->vcpu.arch.regs[VCPU_REGS_RDX] = get_rdx_init_val(); |
2d3ad1f4 | 2692 | kvm_set_cr8(&vmx->vcpu, 0); |
e00c8cf2 | 2693 | msr = 0xfee00000 | MSR_IA32_APICBASE_ENABLE; |
c5af89b6 | 2694 | if (kvm_vcpu_is_bsp(&vmx->vcpu)) |
e00c8cf2 AK |
2695 | msr |= MSR_IA32_APICBASE_BSP; |
2696 | kvm_set_apic_base(&vmx->vcpu, msr); | |
2697 | ||
10ab25cd JK |
2698 | ret = fx_init(&vmx->vcpu); |
2699 | if (ret != 0) | |
2700 | goto out; | |
e00c8cf2 | 2701 | |
5706be0d | 2702 | seg_setup(VCPU_SREG_CS); |
e00c8cf2 AK |
2703 | /* |
2704 | * GUEST_CS_BASE should really be 0xffff0000, but VT vm86 mode | |
2705 | * insists on having GUEST_CS_BASE == GUEST_CS_SELECTOR << 4. Sigh. | |
2706 | */ | |
c5af89b6 | 2707 | if (kvm_vcpu_is_bsp(&vmx->vcpu)) { |
e00c8cf2 AK |
2708 | vmcs_write16(GUEST_CS_SELECTOR, 0xf000); |
2709 | vmcs_writel(GUEST_CS_BASE, 0x000f0000); | |
2710 | } else { | |
ad312c7c ZX |
2711 | vmcs_write16(GUEST_CS_SELECTOR, vmx->vcpu.arch.sipi_vector << 8); |
2712 | vmcs_writel(GUEST_CS_BASE, vmx->vcpu.arch.sipi_vector << 12); | |
e00c8cf2 | 2713 | } |
e00c8cf2 AK |
2714 | |
2715 | seg_setup(VCPU_SREG_DS); | |
2716 | seg_setup(VCPU_SREG_ES); | |
2717 | seg_setup(VCPU_SREG_FS); | |
2718 | seg_setup(VCPU_SREG_GS); | |
2719 | seg_setup(VCPU_SREG_SS); | |
2720 | ||
2721 | vmcs_write16(GUEST_TR_SELECTOR, 0); | |
2722 | vmcs_writel(GUEST_TR_BASE, 0); | |
2723 | vmcs_write32(GUEST_TR_LIMIT, 0xffff); | |
2724 | vmcs_write32(GUEST_TR_AR_BYTES, 0x008b); | |
2725 | ||
2726 | vmcs_write16(GUEST_LDTR_SELECTOR, 0); | |
2727 | vmcs_writel(GUEST_LDTR_BASE, 0); | |
2728 | vmcs_write32(GUEST_LDTR_LIMIT, 0xffff); | |
2729 | vmcs_write32(GUEST_LDTR_AR_BYTES, 0x00082); | |
2730 | ||
2731 | vmcs_write32(GUEST_SYSENTER_CS, 0); | |
2732 | vmcs_writel(GUEST_SYSENTER_ESP, 0); | |
2733 | vmcs_writel(GUEST_SYSENTER_EIP, 0); | |
2734 | ||
2735 | vmcs_writel(GUEST_RFLAGS, 0x02); | |
c5af89b6 | 2736 | if (kvm_vcpu_is_bsp(&vmx->vcpu)) |
5fdbf976 | 2737 | kvm_rip_write(vcpu, 0xfff0); |
e00c8cf2 | 2738 | else |
5fdbf976 MT |
2739 | kvm_rip_write(vcpu, 0); |
2740 | kvm_register_write(vcpu, VCPU_REGS_RSP, 0); | |
e00c8cf2 | 2741 | |
e00c8cf2 AK |
2742 | vmcs_writel(GUEST_DR7, 0x400); |
2743 | ||
2744 | vmcs_writel(GUEST_GDTR_BASE, 0); | |
2745 | vmcs_write32(GUEST_GDTR_LIMIT, 0xffff); | |
2746 | ||
2747 | vmcs_writel(GUEST_IDTR_BASE, 0); | |
2748 | vmcs_write32(GUEST_IDTR_LIMIT, 0xffff); | |
2749 | ||
443381a8 | 2750 | vmcs_write32(GUEST_ACTIVITY_STATE, GUEST_ACTIVITY_ACTIVE); |
e00c8cf2 AK |
2751 | vmcs_write32(GUEST_INTERRUPTIBILITY_INFO, 0); |
2752 | vmcs_write32(GUEST_PENDING_DBG_EXCEPTIONS, 0); | |
2753 | ||
e00c8cf2 AK |
2754 | /* Special registers */ |
2755 | vmcs_write64(GUEST_IA32_DEBUGCTL, 0); | |
2756 | ||
2757 | setup_msrs(vmx); | |
2758 | ||
6aa8b732 AK |
2759 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, 0); /* 22.2.1 */ |
2760 | ||
f78e0e2e SY |
2761 | if (cpu_has_vmx_tpr_shadow()) { |
2762 | vmcs_write64(VIRTUAL_APIC_PAGE_ADDR, 0); | |
2763 | if (vm_need_tpr_shadow(vmx->vcpu.kvm)) | |
2764 | vmcs_write64(VIRTUAL_APIC_PAGE_ADDR, | |
ad312c7c | 2765 | page_to_phys(vmx->vcpu.arch.apic->regs_page)); |
f78e0e2e SY |
2766 | vmcs_write32(TPR_THRESHOLD, 0); |
2767 | } | |
2768 | ||
2769 | if (vm_need_virtualize_apic_accesses(vmx->vcpu.kvm)) | |
2770 | vmcs_write64(APIC_ACCESS_ADDR, | |
bfc6d222 | 2771 | page_to_phys(vmx->vcpu.kvm->arch.apic_access_page)); |
6aa8b732 | 2772 | |
2384d2b3 SY |
2773 | if (vmx->vpid != 0) |
2774 | vmcs_write16(VIRTUAL_PROCESSOR_ID, vmx->vpid); | |
2775 | ||
fa40052c | 2776 | vmx->vcpu.arch.cr0 = X86_CR0_NW | X86_CR0_CD | X86_CR0_ET; |
4d4ec087 | 2777 | vmx_set_cr0(&vmx->vcpu, kvm_read_cr0(vcpu)); /* enter rmode */ |
8b9cf98c | 2778 | vmx_set_cr4(&vmx->vcpu, 0); |
8b9cf98c | 2779 | vmx_set_efer(&vmx->vcpu, 0); |
8b9cf98c RR |
2780 | vmx_fpu_activate(&vmx->vcpu); |
2781 | update_exception_bitmap(&vmx->vcpu); | |
6aa8b732 | 2782 | |
b9d762fa | 2783 | vpid_sync_context(vmx); |
2384d2b3 | 2784 | |
3200f405 | 2785 | ret = 0; |
6aa8b732 | 2786 | |
a89a8fb9 MG |
2787 | /* HACK: Don't enable emulation on guest boot/reset */ |
2788 | vmx->emulation_required = 0; | |
2789 | ||
6aa8b732 AK |
2790 | out: |
2791 | return ret; | |
2792 | } | |
2793 | ||
3b86cd99 JK |
2794 | static void enable_irq_window(struct kvm_vcpu *vcpu) |
2795 | { | |
2796 | u32 cpu_based_vm_exec_control; | |
2797 | ||
2798 | cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL); | |
2799 | cpu_based_vm_exec_control |= CPU_BASED_VIRTUAL_INTR_PENDING; | |
2800 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control); | |
2801 | } | |
2802 | ||
2803 | static void enable_nmi_window(struct kvm_vcpu *vcpu) | |
2804 | { | |
2805 | u32 cpu_based_vm_exec_control; | |
2806 | ||
2807 | if (!cpu_has_virtual_nmis()) { | |
2808 | enable_irq_window(vcpu); | |
2809 | return; | |
2810 | } | |
2811 | ||
30bd0c4c AK |
2812 | if (vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & GUEST_INTR_STATE_STI) { |
2813 | enable_irq_window(vcpu); | |
2814 | return; | |
2815 | } | |
3b86cd99 JK |
2816 | cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL); |
2817 | cpu_based_vm_exec_control |= CPU_BASED_VIRTUAL_NMI_PENDING; | |
2818 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control); | |
2819 | } | |
2820 | ||
66fd3f7f | 2821 | static void vmx_inject_irq(struct kvm_vcpu *vcpu) |
85f455f7 | 2822 | { |
9c8cba37 | 2823 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
66fd3f7f GN |
2824 | uint32_t intr; |
2825 | int irq = vcpu->arch.interrupt.nr; | |
9c8cba37 | 2826 | |
229456fc | 2827 | trace_kvm_inj_virq(irq); |
2714d1d3 | 2828 | |
fa89a817 | 2829 | ++vcpu->stat.irq_injections; |
7ffd92c5 | 2830 | if (vmx->rmode.vm86_active) { |
a92601bb MG |
2831 | if (kvm_inject_realmode_interrupt(vcpu, irq) != EMULATE_DONE) |
2832 | kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu); | |
85f455f7 ED |
2833 | return; |
2834 | } | |
66fd3f7f GN |
2835 | intr = irq | INTR_INFO_VALID_MASK; |
2836 | if (vcpu->arch.interrupt.soft) { | |
2837 | intr |= INTR_TYPE_SOFT_INTR; | |
2838 | vmcs_write32(VM_ENTRY_INSTRUCTION_LEN, | |
2839 | vmx->vcpu.arch.event_exit_inst_len); | |
2840 | } else | |
2841 | intr |= INTR_TYPE_EXT_INTR; | |
2842 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, intr); | |
443381a8 | 2843 | vmx_clear_hlt(vcpu); |
85f455f7 ED |
2844 | } |
2845 | ||
f08864b4 SY |
2846 | static void vmx_inject_nmi(struct kvm_vcpu *vcpu) |
2847 | { | |
66a5a347 JK |
2848 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
2849 | ||
3b86cd99 JK |
2850 | if (!cpu_has_virtual_nmis()) { |
2851 | /* | |
2852 | * Tracking the NMI-blocked state in software is built upon | |
2853 | * finding the next open IRQ window. This, in turn, depends on | |
2854 | * well-behaving guests: They have to keep IRQs disabled at | |
2855 | * least as long as the NMI handler runs. Otherwise we may | |
2856 | * cause NMI nesting, maybe breaking the guest. But as this is | |
2857 | * highly unlikely, we can live with the residual risk. | |
2858 | */ | |
2859 | vmx->soft_vnmi_blocked = 1; | |
2860 | vmx->vnmi_blocked_time = 0; | |
2861 | } | |
2862 | ||
487b391d | 2863 | ++vcpu->stat.nmi_injections; |
7ffd92c5 | 2864 | if (vmx->rmode.vm86_active) { |
a92601bb MG |
2865 | if (kvm_inject_realmode_interrupt(vcpu, NMI_VECTOR) != EMULATE_DONE) |
2866 | kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu); | |
66a5a347 JK |
2867 | return; |
2868 | } | |
f08864b4 SY |
2869 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, |
2870 | INTR_TYPE_NMI_INTR | INTR_INFO_VALID_MASK | NMI_VECTOR); | |
443381a8 | 2871 | vmx_clear_hlt(vcpu); |
f08864b4 SY |
2872 | } |
2873 | ||
c4282df9 | 2874 | static int vmx_nmi_allowed(struct kvm_vcpu *vcpu) |
33f089ca | 2875 | { |
3b86cd99 | 2876 | if (!cpu_has_virtual_nmis() && to_vmx(vcpu)->soft_vnmi_blocked) |
c4282df9 | 2877 | return 0; |
33f089ca | 2878 | |
c4282df9 | 2879 | return !(vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & |
30bd0c4c AK |
2880 | (GUEST_INTR_STATE_MOV_SS | GUEST_INTR_STATE_STI |
2881 | | GUEST_INTR_STATE_NMI)); | |
33f089ca JK |
2882 | } |
2883 | ||
3cfc3092 JK |
2884 | static bool vmx_get_nmi_mask(struct kvm_vcpu *vcpu) |
2885 | { | |
2886 | if (!cpu_has_virtual_nmis()) | |
2887 | return to_vmx(vcpu)->soft_vnmi_blocked; | |
c332c83a | 2888 | return vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & GUEST_INTR_STATE_NMI; |
3cfc3092 JK |
2889 | } |
2890 | ||
2891 | static void vmx_set_nmi_mask(struct kvm_vcpu *vcpu, bool masked) | |
2892 | { | |
2893 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
2894 | ||
2895 | if (!cpu_has_virtual_nmis()) { | |
2896 | if (vmx->soft_vnmi_blocked != masked) { | |
2897 | vmx->soft_vnmi_blocked = masked; | |
2898 | vmx->vnmi_blocked_time = 0; | |
2899 | } | |
2900 | } else { | |
2901 | if (masked) | |
2902 | vmcs_set_bits(GUEST_INTERRUPTIBILITY_INFO, | |
2903 | GUEST_INTR_STATE_NMI); | |
2904 | else | |
2905 | vmcs_clear_bits(GUEST_INTERRUPTIBILITY_INFO, | |
2906 | GUEST_INTR_STATE_NMI); | |
2907 | } | |
2908 | } | |
2909 | ||
78646121 GN |
2910 | static int vmx_interrupt_allowed(struct kvm_vcpu *vcpu) |
2911 | { | |
c4282df9 GN |
2912 | return (vmcs_readl(GUEST_RFLAGS) & X86_EFLAGS_IF) && |
2913 | !(vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & | |
2914 | (GUEST_INTR_STATE_STI | GUEST_INTR_STATE_MOV_SS)); | |
78646121 GN |
2915 | } |
2916 | ||
cbc94022 IE |
2917 | static int vmx_set_tss_addr(struct kvm *kvm, unsigned int addr) |
2918 | { | |
2919 | int ret; | |
2920 | struct kvm_userspace_memory_region tss_mem = { | |
6fe63979 | 2921 | .slot = TSS_PRIVATE_MEMSLOT, |
cbc94022 IE |
2922 | .guest_phys_addr = addr, |
2923 | .memory_size = PAGE_SIZE * 3, | |
2924 | .flags = 0, | |
2925 | }; | |
2926 | ||
2927 | ret = kvm_set_memory_region(kvm, &tss_mem, 0); | |
2928 | if (ret) | |
2929 | return ret; | |
bfc6d222 | 2930 | kvm->arch.tss_addr = addr; |
cbc94022 IE |
2931 | return 0; |
2932 | } | |
2933 | ||
6aa8b732 AK |
2934 | static int handle_rmode_exception(struct kvm_vcpu *vcpu, |
2935 | int vec, u32 err_code) | |
2936 | { | |
b3f37707 NK |
2937 | /* |
2938 | * Instruction with address size override prefix opcode 0x67 | |
2939 | * Cause the #SS fault with 0 error code in VM86 mode. | |
2940 | */ | |
2941 | if (((vec == GP_VECTOR) || (vec == SS_VECTOR)) && err_code == 0) | |
51d8b661 | 2942 | if (emulate_instruction(vcpu, 0) == EMULATE_DONE) |
6aa8b732 | 2943 | return 1; |
77ab6db0 JK |
2944 | /* |
2945 | * Forward all other exceptions that are valid in real mode. | |
2946 | * FIXME: Breaks guest debugging in real mode, needs to be fixed with | |
2947 | * the required debugging infrastructure rework. | |
2948 | */ | |
2949 | switch (vec) { | |
77ab6db0 | 2950 | case DB_VECTOR: |
d0bfb940 JK |
2951 | if (vcpu->guest_debug & |
2952 | (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP)) | |
2953 | return 0; | |
2954 | kvm_queue_exception(vcpu, vec); | |
2955 | return 1; | |
77ab6db0 | 2956 | case BP_VECTOR: |
c573cd22 JK |
2957 | /* |
2958 | * Update instruction length as we may reinject the exception | |
2959 | * from user space while in guest debugging mode. | |
2960 | */ | |
2961 | to_vmx(vcpu)->vcpu.arch.event_exit_inst_len = | |
2962 | vmcs_read32(VM_EXIT_INSTRUCTION_LEN); | |
d0bfb940 JK |
2963 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP) |
2964 | return 0; | |
2965 | /* fall through */ | |
2966 | case DE_VECTOR: | |
77ab6db0 JK |
2967 | case OF_VECTOR: |
2968 | case BR_VECTOR: | |
2969 | case UD_VECTOR: | |
2970 | case DF_VECTOR: | |
2971 | case SS_VECTOR: | |
2972 | case GP_VECTOR: | |
2973 | case MF_VECTOR: | |
2974 | kvm_queue_exception(vcpu, vec); | |
2975 | return 1; | |
2976 | } | |
6aa8b732 AK |
2977 | return 0; |
2978 | } | |
2979 | ||
a0861c02 AK |
2980 | /* |
2981 | * Trigger machine check on the host. We assume all the MSRs are already set up | |
2982 | * by the CPU and that we still run on the same CPU as the MCE occurred on. | |
2983 | * We pass a fake environment to the machine check handler because we want | |
2984 | * the guest to be always treated like user space, no matter what context | |
2985 | * it used internally. | |
2986 | */ | |
2987 | static void kvm_machine_check(void) | |
2988 | { | |
2989 | #if defined(CONFIG_X86_MCE) && defined(CONFIG_X86_64) | |
2990 | struct pt_regs regs = { | |
2991 | .cs = 3, /* Fake ring 3 no matter what the guest ran on */ | |
2992 | .flags = X86_EFLAGS_IF, | |
2993 | }; | |
2994 | ||
2995 | do_machine_check(®s, 0); | |
2996 | #endif | |
2997 | } | |
2998 | ||
851ba692 | 2999 | static int handle_machine_check(struct kvm_vcpu *vcpu) |
a0861c02 AK |
3000 | { |
3001 | /* already handled by vcpu_run */ | |
3002 | return 1; | |
3003 | } | |
3004 | ||
851ba692 | 3005 | static int handle_exception(struct kvm_vcpu *vcpu) |
6aa8b732 | 3006 | { |
1155f76a | 3007 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
851ba692 | 3008 | struct kvm_run *kvm_run = vcpu->run; |
d0bfb940 | 3009 | u32 intr_info, ex_no, error_code; |
42dbaa5a | 3010 | unsigned long cr2, rip, dr6; |
6aa8b732 AK |
3011 | u32 vect_info; |
3012 | enum emulation_result er; | |
3013 | ||
1155f76a | 3014 | vect_info = vmx->idt_vectoring_info; |
6aa8b732 AK |
3015 | intr_info = vmcs_read32(VM_EXIT_INTR_INFO); |
3016 | ||
a0861c02 | 3017 | if (is_machine_check(intr_info)) |
851ba692 | 3018 | return handle_machine_check(vcpu); |
a0861c02 | 3019 | |
6aa8b732 | 3020 | if ((vect_info & VECTORING_INFO_VALID_MASK) && |
65ac7264 AK |
3021 | !is_page_fault(intr_info)) { |
3022 | vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR; | |
3023 | vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_SIMUL_EX; | |
3024 | vcpu->run->internal.ndata = 2; | |
3025 | vcpu->run->internal.data[0] = vect_info; | |
3026 | vcpu->run->internal.data[1] = intr_info; | |
3027 | return 0; | |
3028 | } | |
6aa8b732 | 3029 | |
e4a41889 | 3030 | if ((intr_info & INTR_INFO_INTR_TYPE_MASK) == INTR_TYPE_NMI_INTR) |
1b6269db | 3031 | return 1; /* already handled by vmx_vcpu_run() */ |
2ab455cc AL |
3032 | |
3033 | if (is_no_device(intr_info)) { | |
5fd86fcf | 3034 | vmx_fpu_activate(vcpu); |
2ab455cc AL |
3035 | return 1; |
3036 | } | |
3037 | ||
7aa81cc0 | 3038 | if (is_invalid_opcode(intr_info)) { |
51d8b661 | 3039 | er = emulate_instruction(vcpu, EMULTYPE_TRAP_UD); |
7aa81cc0 | 3040 | if (er != EMULATE_DONE) |
7ee5d940 | 3041 | kvm_queue_exception(vcpu, UD_VECTOR); |
7aa81cc0 AL |
3042 | return 1; |
3043 | } | |
3044 | ||
6aa8b732 | 3045 | error_code = 0; |
5fdbf976 | 3046 | rip = kvm_rip_read(vcpu); |
2e11384c | 3047 | if (intr_info & INTR_INFO_DELIVER_CODE_MASK) |
6aa8b732 AK |
3048 | error_code = vmcs_read32(VM_EXIT_INTR_ERROR_CODE); |
3049 | if (is_page_fault(intr_info)) { | |
1439442c | 3050 | /* EPT won't cause page fault directly */ |
089d034e | 3051 | if (enable_ept) |
1439442c | 3052 | BUG(); |
6aa8b732 | 3053 | cr2 = vmcs_readl(EXIT_QUALIFICATION); |
229456fc MT |
3054 | trace_kvm_page_fault(cr2, error_code); |
3055 | ||
3298b75c | 3056 | if (kvm_event_needs_reinjection(vcpu)) |
577bdc49 | 3057 | kvm_mmu_unprotect_page_virt(vcpu, cr2); |
3067714c | 3058 | return kvm_mmu_page_fault(vcpu, cr2, error_code); |
6aa8b732 AK |
3059 | } |
3060 | ||
7ffd92c5 | 3061 | if (vmx->rmode.vm86_active && |
6aa8b732 | 3062 | handle_rmode_exception(vcpu, intr_info & INTR_INFO_VECTOR_MASK, |
72d6e5a0 | 3063 | error_code)) { |
ad312c7c ZX |
3064 | if (vcpu->arch.halt_request) { |
3065 | vcpu->arch.halt_request = 0; | |
72d6e5a0 AK |
3066 | return kvm_emulate_halt(vcpu); |
3067 | } | |
6aa8b732 | 3068 | return 1; |
72d6e5a0 | 3069 | } |
6aa8b732 | 3070 | |
d0bfb940 | 3071 | ex_no = intr_info & INTR_INFO_VECTOR_MASK; |
42dbaa5a JK |
3072 | switch (ex_no) { |
3073 | case DB_VECTOR: | |
3074 | dr6 = vmcs_readl(EXIT_QUALIFICATION); | |
3075 | if (!(vcpu->guest_debug & | |
3076 | (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP))) { | |
3077 | vcpu->arch.dr6 = dr6 | DR6_FIXED_1; | |
3078 | kvm_queue_exception(vcpu, DB_VECTOR); | |
3079 | return 1; | |
3080 | } | |
3081 | kvm_run->debug.arch.dr6 = dr6 | DR6_FIXED_1; | |
3082 | kvm_run->debug.arch.dr7 = vmcs_readl(GUEST_DR7); | |
3083 | /* fall through */ | |
3084 | case BP_VECTOR: | |
c573cd22 JK |
3085 | /* |
3086 | * Update instruction length as we may reinject #BP from | |
3087 | * user space while in guest debugging mode. Reading it for | |
3088 | * #DB as well causes no harm, it is not used in that case. | |
3089 | */ | |
3090 | vmx->vcpu.arch.event_exit_inst_len = | |
3091 | vmcs_read32(VM_EXIT_INSTRUCTION_LEN); | |
6aa8b732 | 3092 | kvm_run->exit_reason = KVM_EXIT_DEBUG; |
d0bfb940 JK |
3093 | kvm_run->debug.arch.pc = vmcs_readl(GUEST_CS_BASE) + rip; |
3094 | kvm_run->debug.arch.exception = ex_no; | |
42dbaa5a JK |
3095 | break; |
3096 | default: | |
d0bfb940 JK |
3097 | kvm_run->exit_reason = KVM_EXIT_EXCEPTION; |
3098 | kvm_run->ex.exception = ex_no; | |
3099 | kvm_run->ex.error_code = error_code; | |
42dbaa5a | 3100 | break; |
6aa8b732 | 3101 | } |
6aa8b732 AK |
3102 | return 0; |
3103 | } | |
3104 | ||
851ba692 | 3105 | static int handle_external_interrupt(struct kvm_vcpu *vcpu) |
6aa8b732 | 3106 | { |
1165f5fe | 3107 | ++vcpu->stat.irq_exits; |
6aa8b732 AK |
3108 | return 1; |
3109 | } | |
3110 | ||
851ba692 | 3111 | static int handle_triple_fault(struct kvm_vcpu *vcpu) |
988ad74f | 3112 | { |
851ba692 | 3113 | vcpu->run->exit_reason = KVM_EXIT_SHUTDOWN; |
988ad74f AK |
3114 | return 0; |
3115 | } | |
6aa8b732 | 3116 | |
851ba692 | 3117 | static int handle_io(struct kvm_vcpu *vcpu) |
6aa8b732 | 3118 | { |
bfdaab09 | 3119 | unsigned long exit_qualification; |
34c33d16 | 3120 | int size, in, string; |
039576c0 | 3121 | unsigned port; |
6aa8b732 | 3122 | |
bfdaab09 | 3123 | exit_qualification = vmcs_readl(EXIT_QUALIFICATION); |
039576c0 | 3124 | string = (exit_qualification & 16) != 0; |
cf8f70bf | 3125 | in = (exit_qualification & 8) != 0; |
e70669ab | 3126 | |
cf8f70bf | 3127 | ++vcpu->stat.io_exits; |
e70669ab | 3128 | |
cf8f70bf | 3129 | if (string || in) |
51d8b661 | 3130 | return emulate_instruction(vcpu, 0) == EMULATE_DONE; |
e70669ab | 3131 | |
cf8f70bf GN |
3132 | port = exit_qualification >> 16; |
3133 | size = (exit_qualification & 7) + 1; | |
e93f36bc | 3134 | skip_emulated_instruction(vcpu); |
cf8f70bf GN |
3135 | |
3136 | return kvm_fast_pio_out(vcpu, size, port); | |
6aa8b732 AK |
3137 | } |
3138 | ||
102d8325 IM |
3139 | static void |
3140 | vmx_patch_hypercall(struct kvm_vcpu *vcpu, unsigned char *hypercall) | |
3141 | { | |
3142 | /* | |
3143 | * Patch in the VMCALL instruction: | |
3144 | */ | |
3145 | hypercall[0] = 0x0f; | |
3146 | hypercall[1] = 0x01; | |
3147 | hypercall[2] = 0xc1; | |
102d8325 IM |
3148 | } |
3149 | ||
851ba692 | 3150 | static int handle_cr(struct kvm_vcpu *vcpu) |
6aa8b732 | 3151 | { |
229456fc | 3152 | unsigned long exit_qualification, val; |
6aa8b732 AK |
3153 | int cr; |
3154 | int reg; | |
49a9b07e | 3155 | int err; |
6aa8b732 | 3156 | |
bfdaab09 | 3157 | exit_qualification = vmcs_readl(EXIT_QUALIFICATION); |
6aa8b732 AK |
3158 | cr = exit_qualification & 15; |
3159 | reg = (exit_qualification >> 8) & 15; | |
3160 | switch ((exit_qualification >> 4) & 3) { | |
3161 | case 0: /* mov to cr */ | |
229456fc MT |
3162 | val = kvm_register_read(vcpu, reg); |
3163 | trace_kvm_cr_write(cr, val); | |
6aa8b732 AK |
3164 | switch (cr) { |
3165 | case 0: | |
49a9b07e | 3166 | err = kvm_set_cr0(vcpu, val); |
db8fcefa | 3167 | kvm_complete_insn_gp(vcpu, err); |
6aa8b732 AK |
3168 | return 1; |
3169 | case 3: | |
2390218b | 3170 | err = kvm_set_cr3(vcpu, val); |
db8fcefa | 3171 | kvm_complete_insn_gp(vcpu, err); |
6aa8b732 AK |
3172 | return 1; |
3173 | case 4: | |
a83b29c6 | 3174 | err = kvm_set_cr4(vcpu, val); |
db8fcefa | 3175 | kvm_complete_insn_gp(vcpu, err); |
6aa8b732 | 3176 | return 1; |
0a5fff19 GN |
3177 | case 8: { |
3178 | u8 cr8_prev = kvm_get_cr8(vcpu); | |
3179 | u8 cr8 = kvm_register_read(vcpu, reg); | |
eea1cff9 | 3180 | err = kvm_set_cr8(vcpu, cr8); |
db8fcefa | 3181 | kvm_complete_insn_gp(vcpu, err); |
0a5fff19 GN |
3182 | if (irqchip_in_kernel(vcpu->kvm)) |
3183 | return 1; | |
3184 | if (cr8_prev <= cr8) | |
3185 | return 1; | |
851ba692 | 3186 | vcpu->run->exit_reason = KVM_EXIT_SET_TPR; |
0a5fff19 GN |
3187 | return 0; |
3188 | } | |
6aa8b732 AK |
3189 | }; |
3190 | break; | |
25c4c276 | 3191 | case 2: /* clts */ |
edcafe3c | 3192 | vmx_set_cr0(vcpu, kvm_read_cr0_bits(vcpu, ~X86_CR0_TS)); |
4d4ec087 | 3193 | trace_kvm_cr_write(0, kvm_read_cr0(vcpu)); |
25c4c276 | 3194 | skip_emulated_instruction(vcpu); |
6b52d186 | 3195 | vmx_fpu_activate(vcpu); |
25c4c276 | 3196 | return 1; |
6aa8b732 AK |
3197 | case 1: /*mov from cr*/ |
3198 | switch (cr) { | |
3199 | case 3: | |
5fdbf976 | 3200 | kvm_register_write(vcpu, reg, vcpu->arch.cr3); |
229456fc | 3201 | trace_kvm_cr_read(cr, vcpu->arch.cr3); |
6aa8b732 AK |
3202 | skip_emulated_instruction(vcpu); |
3203 | return 1; | |
3204 | case 8: | |
229456fc MT |
3205 | val = kvm_get_cr8(vcpu); |
3206 | kvm_register_write(vcpu, reg, val); | |
3207 | trace_kvm_cr_read(cr, val); | |
6aa8b732 AK |
3208 | skip_emulated_instruction(vcpu); |
3209 | return 1; | |
3210 | } | |
3211 | break; | |
3212 | case 3: /* lmsw */ | |
a1f83a74 | 3213 | val = (exit_qualification >> LMSW_SOURCE_DATA_SHIFT) & 0x0f; |
4d4ec087 | 3214 | trace_kvm_cr_write(0, (kvm_read_cr0(vcpu) & ~0xful) | val); |
a1f83a74 | 3215 | kvm_lmsw(vcpu, val); |
6aa8b732 AK |
3216 | |
3217 | skip_emulated_instruction(vcpu); | |
3218 | return 1; | |
3219 | default: | |
3220 | break; | |
3221 | } | |
851ba692 | 3222 | vcpu->run->exit_reason = 0; |
f0242478 | 3223 | pr_unimpl(vcpu, "unhandled control register: op %d cr %d\n", |
6aa8b732 AK |
3224 | (int)(exit_qualification >> 4) & 3, cr); |
3225 | return 0; | |
3226 | } | |
3227 | ||
851ba692 | 3228 | static int handle_dr(struct kvm_vcpu *vcpu) |
6aa8b732 | 3229 | { |
bfdaab09 | 3230 | unsigned long exit_qualification; |
6aa8b732 AK |
3231 | int dr, reg; |
3232 | ||
f2483415 | 3233 | /* Do not handle if the CPL > 0, will trigger GP on re-entry */ |
0a79b009 AK |
3234 | if (!kvm_require_cpl(vcpu, 0)) |
3235 | return 1; | |
42dbaa5a JK |
3236 | dr = vmcs_readl(GUEST_DR7); |
3237 | if (dr & DR7_GD) { | |
3238 | /* | |
3239 | * As the vm-exit takes precedence over the debug trap, we | |
3240 | * need to emulate the latter, either for the host or the | |
3241 | * guest debugging itself. | |
3242 | */ | |
3243 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) { | |
851ba692 AK |
3244 | vcpu->run->debug.arch.dr6 = vcpu->arch.dr6; |
3245 | vcpu->run->debug.arch.dr7 = dr; | |
3246 | vcpu->run->debug.arch.pc = | |
42dbaa5a JK |
3247 | vmcs_readl(GUEST_CS_BASE) + |
3248 | vmcs_readl(GUEST_RIP); | |
851ba692 AK |
3249 | vcpu->run->debug.arch.exception = DB_VECTOR; |
3250 | vcpu->run->exit_reason = KVM_EXIT_DEBUG; | |
42dbaa5a JK |
3251 | return 0; |
3252 | } else { | |
3253 | vcpu->arch.dr7 &= ~DR7_GD; | |
3254 | vcpu->arch.dr6 |= DR6_BD; | |
3255 | vmcs_writel(GUEST_DR7, vcpu->arch.dr7); | |
3256 | kvm_queue_exception(vcpu, DB_VECTOR); | |
3257 | return 1; | |
3258 | } | |
3259 | } | |
3260 | ||
bfdaab09 | 3261 | exit_qualification = vmcs_readl(EXIT_QUALIFICATION); |
42dbaa5a JK |
3262 | dr = exit_qualification & DEBUG_REG_ACCESS_NUM; |
3263 | reg = DEBUG_REG_ACCESS_REG(exit_qualification); | |
3264 | if (exit_qualification & TYPE_MOV_FROM_DR) { | |
020df079 GN |
3265 | unsigned long val; |
3266 | if (!kvm_get_dr(vcpu, dr, &val)) | |
3267 | kvm_register_write(vcpu, reg, val); | |
3268 | } else | |
3269 | kvm_set_dr(vcpu, dr, vcpu->arch.regs[reg]); | |
6aa8b732 AK |
3270 | skip_emulated_instruction(vcpu); |
3271 | return 1; | |
3272 | } | |
3273 | ||
020df079 GN |
3274 | static void vmx_set_dr7(struct kvm_vcpu *vcpu, unsigned long val) |
3275 | { | |
3276 | vmcs_writel(GUEST_DR7, val); | |
3277 | } | |
3278 | ||
851ba692 | 3279 | static int handle_cpuid(struct kvm_vcpu *vcpu) |
6aa8b732 | 3280 | { |
06465c5a AK |
3281 | kvm_emulate_cpuid(vcpu); |
3282 | return 1; | |
6aa8b732 AK |
3283 | } |
3284 | ||
851ba692 | 3285 | static int handle_rdmsr(struct kvm_vcpu *vcpu) |
6aa8b732 | 3286 | { |
ad312c7c | 3287 | u32 ecx = vcpu->arch.regs[VCPU_REGS_RCX]; |
6aa8b732 AK |
3288 | u64 data; |
3289 | ||
3290 | if (vmx_get_msr(vcpu, ecx, &data)) { | |
59200273 | 3291 | trace_kvm_msr_read_ex(ecx); |
c1a5d4f9 | 3292 | kvm_inject_gp(vcpu, 0); |
6aa8b732 AK |
3293 | return 1; |
3294 | } | |
3295 | ||
229456fc | 3296 | trace_kvm_msr_read(ecx, data); |
2714d1d3 | 3297 | |
6aa8b732 | 3298 | /* FIXME: handling of bits 32:63 of rax, rdx */ |
ad312c7c ZX |
3299 | vcpu->arch.regs[VCPU_REGS_RAX] = data & -1u; |
3300 | vcpu->arch.regs[VCPU_REGS_RDX] = (data >> 32) & -1u; | |
6aa8b732 AK |
3301 | skip_emulated_instruction(vcpu); |
3302 | return 1; | |
3303 | } | |
3304 | ||
851ba692 | 3305 | static int handle_wrmsr(struct kvm_vcpu *vcpu) |
6aa8b732 | 3306 | { |
ad312c7c ZX |
3307 | u32 ecx = vcpu->arch.regs[VCPU_REGS_RCX]; |
3308 | u64 data = (vcpu->arch.regs[VCPU_REGS_RAX] & -1u) | |
3309 | | ((u64)(vcpu->arch.regs[VCPU_REGS_RDX] & -1u) << 32); | |
6aa8b732 AK |
3310 | |
3311 | if (vmx_set_msr(vcpu, ecx, data) != 0) { | |
59200273 | 3312 | trace_kvm_msr_write_ex(ecx, data); |
c1a5d4f9 | 3313 | kvm_inject_gp(vcpu, 0); |
6aa8b732 AK |
3314 | return 1; |
3315 | } | |
3316 | ||
59200273 | 3317 | trace_kvm_msr_write(ecx, data); |
6aa8b732 AK |
3318 | skip_emulated_instruction(vcpu); |
3319 | return 1; | |
3320 | } | |
3321 | ||
851ba692 | 3322 | static int handle_tpr_below_threshold(struct kvm_vcpu *vcpu) |
6e5d865c | 3323 | { |
3842d135 | 3324 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
6e5d865c YS |
3325 | return 1; |
3326 | } | |
3327 | ||
851ba692 | 3328 | static int handle_interrupt_window(struct kvm_vcpu *vcpu) |
6aa8b732 | 3329 | { |
85f455f7 ED |
3330 | u32 cpu_based_vm_exec_control; |
3331 | ||
3332 | /* clear pending irq */ | |
3333 | cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL); | |
3334 | cpu_based_vm_exec_control &= ~CPU_BASED_VIRTUAL_INTR_PENDING; | |
3335 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control); | |
2714d1d3 | 3336 | |
3842d135 AK |
3337 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
3338 | ||
a26bf12a | 3339 | ++vcpu->stat.irq_window_exits; |
2714d1d3 | 3340 | |
c1150d8c DL |
3341 | /* |
3342 | * If the user space waits to inject interrupts, exit as soon as | |
3343 | * possible | |
3344 | */ | |
8061823a | 3345 | if (!irqchip_in_kernel(vcpu->kvm) && |
851ba692 | 3346 | vcpu->run->request_interrupt_window && |
8061823a | 3347 | !kvm_cpu_has_interrupt(vcpu)) { |
851ba692 | 3348 | vcpu->run->exit_reason = KVM_EXIT_IRQ_WINDOW_OPEN; |
c1150d8c DL |
3349 | return 0; |
3350 | } | |
6aa8b732 AK |
3351 | return 1; |
3352 | } | |
3353 | ||
851ba692 | 3354 | static int handle_halt(struct kvm_vcpu *vcpu) |
6aa8b732 AK |
3355 | { |
3356 | skip_emulated_instruction(vcpu); | |
d3bef15f | 3357 | return kvm_emulate_halt(vcpu); |
6aa8b732 AK |
3358 | } |
3359 | ||
851ba692 | 3360 | static int handle_vmcall(struct kvm_vcpu *vcpu) |
c21415e8 | 3361 | { |
510043da | 3362 | skip_emulated_instruction(vcpu); |
7aa81cc0 AL |
3363 | kvm_emulate_hypercall(vcpu); |
3364 | return 1; | |
c21415e8 IM |
3365 | } |
3366 | ||
851ba692 | 3367 | static int handle_vmx_insn(struct kvm_vcpu *vcpu) |
e3c7cb6a AK |
3368 | { |
3369 | kvm_queue_exception(vcpu, UD_VECTOR); | |
3370 | return 1; | |
3371 | } | |
3372 | ||
ec25d5e6 GN |
3373 | static int handle_invd(struct kvm_vcpu *vcpu) |
3374 | { | |
51d8b661 | 3375 | return emulate_instruction(vcpu, 0) == EMULATE_DONE; |
ec25d5e6 GN |
3376 | } |
3377 | ||
851ba692 | 3378 | static int handle_invlpg(struct kvm_vcpu *vcpu) |
a7052897 | 3379 | { |
f9c617f6 | 3380 | unsigned long exit_qualification = vmcs_readl(EXIT_QUALIFICATION); |
a7052897 MT |
3381 | |
3382 | kvm_mmu_invlpg(vcpu, exit_qualification); | |
3383 | skip_emulated_instruction(vcpu); | |
3384 | return 1; | |
3385 | } | |
3386 | ||
851ba692 | 3387 | static int handle_wbinvd(struct kvm_vcpu *vcpu) |
e5edaa01 ED |
3388 | { |
3389 | skip_emulated_instruction(vcpu); | |
f5f48ee1 | 3390 | kvm_emulate_wbinvd(vcpu); |
e5edaa01 ED |
3391 | return 1; |
3392 | } | |
3393 | ||
2acf923e DC |
3394 | static int handle_xsetbv(struct kvm_vcpu *vcpu) |
3395 | { | |
3396 | u64 new_bv = kvm_read_edx_eax(vcpu); | |
3397 | u32 index = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
3398 | ||
3399 | if (kvm_set_xcr(vcpu, index, new_bv) == 0) | |
3400 | skip_emulated_instruction(vcpu); | |
3401 | return 1; | |
3402 | } | |
3403 | ||
851ba692 | 3404 | static int handle_apic_access(struct kvm_vcpu *vcpu) |
f78e0e2e | 3405 | { |
51d8b661 | 3406 | return emulate_instruction(vcpu, 0) == EMULATE_DONE; |
f78e0e2e SY |
3407 | } |
3408 | ||
851ba692 | 3409 | static int handle_task_switch(struct kvm_vcpu *vcpu) |
37817f29 | 3410 | { |
60637aac | 3411 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
37817f29 | 3412 | unsigned long exit_qualification; |
e269fb21 JK |
3413 | bool has_error_code = false; |
3414 | u32 error_code = 0; | |
37817f29 | 3415 | u16 tss_selector; |
64a7ec06 GN |
3416 | int reason, type, idt_v; |
3417 | ||
3418 | idt_v = (vmx->idt_vectoring_info & VECTORING_INFO_VALID_MASK); | |
3419 | type = (vmx->idt_vectoring_info & VECTORING_INFO_TYPE_MASK); | |
37817f29 IE |
3420 | |
3421 | exit_qualification = vmcs_readl(EXIT_QUALIFICATION); | |
3422 | ||
3423 | reason = (u32)exit_qualification >> 30; | |
64a7ec06 GN |
3424 | if (reason == TASK_SWITCH_GATE && idt_v) { |
3425 | switch (type) { | |
3426 | case INTR_TYPE_NMI_INTR: | |
3427 | vcpu->arch.nmi_injected = false; | |
3428 | if (cpu_has_virtual_nmis()) | |
3429 | vmcs_set_bits(GUEST_INTERRUPTIBILITY_INFO, | |
3430 | GUEST_INTR_STATE_NMI); | |
3431 | break; | |
3432 | case INTR_TYPE_EXT_INTR: | |
66fd3f7f | 3433 | case INTR_TYPE_SOFT_INTR: |
64a7ec06 GN |
3434 | kvm_clear_interrupt_queue(vcpu); |
3435 | break; | |
3436 | case INTR_TYPE_HARD_EXCEPTION: | |
e269fb21 JK |
3437 | if (vmx->idt_vectoring_info & |
3438 | VECTORING_INFO_DELIVER_CODE_MASK) { | |
3439 | has_error_code = true; | |
3440 | error_code = | |
3441 | vmcs_read32(IDT_VECTORING_ERROR_CODE); | |
3442 | } | |
3443 | /* fall through */ | |
64a7ec06 GN |
3444 | case INTR_TYPE_SOFT_EXCEPTION: |
3445 | kvm_clear_exception_queue(vcpu); | |
3446 | break; | |
3447 | default: | |
3448 | break; | |
3449 | } | |
60637aac | 3450 | } |
37817f29 IE |
3451 | tss_selector = exit_qualification; |
3452 | ||
64a7ec06 GN |
3453 | if (!idt_v || (type != INTR_TYPE_HARD_EXCEPTION && |
3454 | type != INTR_TYPE_EXT_INTR && | |
3455 | type != INTR_TYPE_NMI_INTR)) | |
3456 | skip_emulated_instruction(vcpu); | |
3457 | ||
acb54517 GN |
3458 | if (kvm_task_switch(vcpu, tss_selector, reason, |
3459 | has_error_code, error_code) == EMULATE_FAIL) { | |
3460 | vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR; | |
3461 | vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION; | |
3462 | vcpu->run->internal.ndata = 0; | |
42dbaa5a | 3463 | return 0; |
acb54517 | 3464 | } |
42dbaa5a JK |
3465 | |
3466 | /* clear all local breakpoint enable flags */ | |
3467 | vmcs_writel(GUEST_DR7, vmcs_readl(GUEST_DR7) & ~55); | |
3468 | ||
3469 | /* | |
3470 | * TODO: What about debug traps on tss switch? | |
3471 | * Are we supposed to inject them and update dr6? | |
3472 | */ | |
3473 | ||
3474 | return 1; | |
37817f29 IE |
3475 | } |
3476 | ||
851ba692 | 3477 | static int handle_ept_violation(struct kvm_vcpu *vcpu) |
1439442c | 3478 | { |
f9c617f6 | 3479 | unsigned long exit_qualification; |
1439442c | 3480 | gpa_t gpa; |
1439442c | 3481 | int gla_validity; |
1439442c | 3482 | |
f9c617f6 | 3483 | exit_qualification = vmcs_readl(EXIT_QUALIFICATION); |
1439442c SY |
3484 | |
3485 | if (exit_qualification & (1 << 6)) { | |
3486 | printk(KERN_ERR "EPT: GPA exceeds GAW!\n"); | |
7f582ab6 | 3487 | return -EINVAL; |
1439442c SY |
3488 | } |
3489 | ||
3490 | gla_validity = (exit_qualification >> 7) & 0x3; | |
3491 | if (gla_validity != 0x3 && gla_validity != 0x1 && gla_validity != 0) { | |
3492 | printk(KERN_ERR "EPT: Handling EPT violation failed!\n"); | |
3493 | printk(KERN_ERR "EPT: GPA: 0x%lx, GVA: 0x%lx\n", | |
3494 | (long unsigned int)vmcs_read64(GUEST_PHYSICAL_ADDRESS), | |
f9c617f6 | 3495 | vmcs_readl(GUEST_LINEAR_ADDRESS)); |
1439442c SY |
3496 | printk(KERN_ERR "EPT: Exit qualification is 0x%lx\n", |
3497 | (long unsigned int)exit_qualification); | |
851ba692 AK |
3498 | vcpu->run->exit_reason = KVM_EXIT_UNKNOWN; |
3499 | vcpu->run->hw.hardware_exit_reason = EXIT_REASON_EPT_VIOLATION; | |
596ae895 | 3500 | return 0; |
1439442c SY |
3501 | } |
3502 | ||
3503 | gpa = vmcs_read64(GUEST_PHYSICAL_ADDRESS); | |
229456fc | 3504 | trace_kvm_page_fault(gpa, exit_qualification); |
ff1fcb9e | 3505 | return kvm_mmu_page_fault(vcpu, gpa, exit_qualification & 0x3); |
1439442c SY |
3506 | } |
3507 | ||
68f89400 MT |
3508 | static u64 ept_rsvd_mask(u64 spte, int level) |
3509 | { | |
3510 | int i; | |
3511 | u64 mask = 0; | |
3512 | ||
3513 | for (i = 51; i > boot_cpu_data.x86_phys_bits; i--) | |
3514 | mask |= (1ULL << i); | |
3515 | ||
3516 | if (level > 2) | |
3517 | /* bits 7:3 reserved */ | |
3518 | mask |= 0xf8; | |
3519 | else if (level == 2) { | |
3520 | if (spte & (1ULL << 7)) | |
3521 | /* 2MB ref, bits 20:12 reserved */ | |
3522 | mask |= 0x1ff000; | |
3523 | else | |
3524 | /* bits 6:3 reserved */ | |
3525 | mask |= 0x78; | |
3526 | } | |
3527 | ||
3528 | return mask; | |
3529 | } | |
3530 | ||
3531 | static void ept_misconfig_inspect_spte(struct kvm_vcpu *vcpu, u64 spte, | |
3532 | int level) | |
3533 | { | |
3534 | printk(KERN_ERR "%s: spte 0x%llx level %d\n", __func__, spte, level); | |
3535 | ||
3536 | /* 010b (write-only) */ | |
3537 | WARN_ON((spte & 0x7) == 0x2); | |
3538 | ||
3539 | /* 110b (write/execute) */ | |
3540 | WARN_ON((spte & 0x7) == 0x6); | |
3541 | ||
3542 | /* 100b (execute-only) and value not supported by logical processor */ | |
3543 | if (!cpu_has_vmx_ept_execute_only()) | |
3544 | WARN_ON((spte & 0x7) == 0x4); | |
3545 | ||
3546 | /* not 000b */ | |
3547 | if ((spte & 0x7)) { | |
3548 | u64 rsvd_bits = spte & ept_rsvd_mask(spte, level); | |
3549 | ||
3550 | if (rsvd_bits != 0) { | |
3551 | printk(KERN_ERR "%s: rsvd_bits = 0x%llx\n", | |
3552 | __func__, rsvd_bits); | |
3553 | WARN_ON(1); | |
3554 | } | |
3555 | ||
3556 | if (level == 1 || (level == 2 && (spte & (1ULL << 7)))) { | |
3557 | u64 ept_mem_type = (spte & 0x38) >> 3; | |
3558 | ||
3559 | if (ept_mem_type == 2 || ept_mem_type == 3 || | |
3560 | ept_mem_type == 7) { | |
3561 | printk(KERN_ERR "%s: ept_mem_type=0x%llx\n", | |
3562 | __func__, ept_mem_type); | |
3563 | WARN_ON(1); | |
3564 | } | |
3565 | } | |
3566 | } | |
3567 | } | |
3568 | ||
851ba692 | 3569 | static int handle_ept_misconfig(struct kvm_vcpu *vcpu) |
68f89400 MT |
3570 | { |
3571 | u64 sptes[4]; | |
3572 | int nr_sptes, i; | |
3573 | gpa_t gpa; | |
3574 | ||
3575 | gpa = vmcs_read64(GUEST_PHYSICAL_ADDRESS); | |
3576 | ||
3577 | printk(KERN_ERR "EPT: Misconfiguration.\n"); | |
3578 | printk(KERN_ERR "EPT: GPA: 0x%llx\n", gpa); | |
3579 | ||
3580 | nr_sptes = kvm_mmu_get_spte_hierarchy(vcpu, gpa, sptes); | |
3581 | ||
3582 | for (i = PT64_ROOT_LEVEL; i > PT64_ROOT_LEVEL - nr_sptes; --i) | |
3583 | ept_misconfig_inspect_spte(vcpu, sptes[i-1], i); | |
3584 | ||
851ba692 AK |
3585 | vcpu->run->exit_reason = KVM_EXIT_UNKNOWN; |
3586 | vcpu->run->hw.hardware_exit_reason = EXIT_REASON_EPT_MISCONFIG; | |
68f89400 MT |
3587 | |
3588 | return 0; | |
3589 | } | |
3590 | ||
851ba692 | 3591 | static int handle_nmi_window(struct kvm_vcpu *vcpu) |
f08864b4 SY |
3592 | { |
3593 | u32 cpu_based_vm_exec_control; | |
3594 | ||
3595 | /* clear pending NMI */ | |
3596 | cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL); | |
3597 | cpu_based_vm_exec_control &= ~CPU_BASED_VIRTUAL_NMI_PENDING; | |
3598 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control); | |
3599 | ++vcpu->stat.nmi_window_exits; | |
3842d135 | 3600 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
f08864b4 SY |
3601 | |
3602 | return 1; | |
3603 | } | |
3604 | ||
80ced186 | 3605 | static int handle_invalid_guest_state(struct kvm_vcpu *vcpu) |
ea953ef0 | 3606 | { |
8b3079a5 AK |
3607 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
3608 | enum emulation_result err = EMULATE_DONE; | |
80ced186 | 3609 | int ret = 1; |
49e9d557 AK |
3610 | u32 cpu_exec_ctrl; |
3611 | bool intr_window_requested; | |
3612 | ||
3613 | cpu_exec_ctrl = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL); | |
3614 | intr_window_requested = cpu_exec_ctrl & CPU_BASED_VIRTUAL_INTR_PENDING; | |
ea953ef0 MG |
3615 | |
3616 | while (!guest_state_valid(vcpu)) { | |
49e9d557 AK |
3617 | if (intr_window_requested |
3618 | && (kvm_get_rflags(&vmx->vcpu) & X86_EFLAGS_IF)) | |
3619 | return handle_interrupt_window(&vmx->vcpu); | |
3620 | ||
51d8b661 | 3621 | err = emulate_instruction(vcpu, 0); |
ea953ef0 | 3622 | |
80ced186 MG |
3623 | if (err == EMULATE_DO_MMIO) { |
3624 | ret = 0; | |
3625 | goto out; | |
3626 | } | |
1d5a4d9b | 3627 | |
6d77dbfc GN |
3628 | if (err != EMULATE_DONE) |
3629 | return 0; | |
ea953ef0 MG |
3630 | |
3631 | if (signal_pending(current)) | |
80ced186 | 3632 | goto out; |
ea953ef0 MG |
3633 | if (need_resched()) |
3634 | schedule(); | |
3635 | } | |
3636 | ||
80ced186 MG |
3637 | vmx->emulation_required = 0; |
3638 | out: | |
3639 | return ret; | |
ea953ef0 MG |
3640 | } |
3641 | ||
4b8d54f9 ZE |
3642 | /* |
3643 | * Indicate a busy-waiting vcpu in spinlock. We do not enable the PAUSE | |
3644 | * exiting, so only get here on cpu with PAUSE-Loop-Exiting. | |
3645 | */ | |
9fb41ba8 | 3646 | static int handle_pause(struct kvm_vcpu *vcpu) |
4b8d54f9 ZE |
3647 | { |
3648 | skip_emulated_instruction(vcpu); | |
3649 | kvm_vcpu_on_spin(vcpu); | |
3650 | ||
3651 | return 1; | |
3652 | } | |
3653 | ||
59708670 SY |
3654 | static int handle_invalid_op(struct kvm_vcpu *vcpu) |
3655 | { | |
3656 | kvm_queue_exception(vcpu, UD_VECTOR); | |
3657 | return 1; | |
3658 | } | |
3659 | ||
6aa8b732 AK |
3660 | /* |
3661 | * The exit handlers return 1 if the exit was handled fully and guest execution | |
3662 | * may resume. Otherwise they set the kvm_run parameter to indicate what needs | |
3663 | * to be done to userspace and return 0. | |
3664 | */ | |
851ba692 | 3665 | static int (*kvm_vmx_exit_handlers[])(struct kvm_vcpu *vcpu) = { |
6aa8b732 AK |
3666 | [EXIT_REASON_EXCEPTION_NMI] = handle_exception, |
3667 | [EXIT_REASON_EXTERNAL_INTERRUPT] = handle_external_interrupt, | |
988ad74f | 3668 | [EXIT_REASON_TRIPLE_FAULT] = handle_triple_fault, |
f08864b4 | 3669 | [EXIT_REASON_NMI_WINDOW] = handle_nmi_window, |
6aa8b732 | 3670 | [EXIT_REASON_IO_INSTRUCTION] = handle_io, |
6aa8b732 AK |
3671 | [EXIT_REASON_CR_ACCESS] = handle_cr, |
3672 | [EXIT_REASON_DR_ACCESS] = handle_dr, | |
3673 | [EXIT_REASON_CPUID] = handle_cpuid, | |
3674 | [EXIT_REASON_MSR_READ] = handle_rdmsr, | |
3675 | [EXIT_REASON_MSR_WRITE] = handle_wrmsr, | |
3676 | [EXIT_REASON_PENDING_INTERRUPT] = handle_interrupt_window, | |
3677 | [EXIT_REASON_HLT] = handle_halt, | |
ec25d5e6 | 3678 | [EXIT_REASON_INVD] = handle_invd, |
a7052897 | 3679 | [EXIT_REASON_INVLPG] = handle_invlpg, |
c21415e8 | 3680 | [EXIT_REASON_VMCALL] = handle_vmcall, |
e3c7cb6a AK |
3681 | [EXIT_REASON_VMCLEAR] = handle_vmx_insn, |
3682 | [EXIT_REASON_VMLAUNCH] = handle_vmx_insn, | |
3683 | [EXIT_REASON_VMPTRLD] = handle_vmx_insn, | |
3684 | [EXIT_REASON_VMPTRST] = handle_vmx_insn, | |
3685 | [EXIT_REASON_VMREAD] = handle_vmx_insn, | |
3686 | [EXIT_REASON_VMRESUME] = handle_vmx_insn, | |
3687 | [EXIT_REASON_VMWRITE] = handle_vmx_insn, | |
3688 | [EXIT_REASON_VMOFF] = handle_vmx_insn, | |
3689 | [EXIT_REASON_VMON] = handle_vmx_insn, | |
f78e0e2e SY |
3690 | [EXIT_REASON_TPR_BELOW_THRESHOLD] = handle_tpr_below_threshold, |
3691 | [EXIT_REASON_APIC_ACCESS] = handle_apic_access, | |
e5edaa01 | 3692 | [EXIT_REASON_WBINVD] = handle_wbinvd, |
2acf923e | 3693 | [EXIT_REASON_XSETBV] = handle_xsetbv, |
37817f29 | 3694 | [EXIT_REASON_TASK_SWITCH] = handle_task_switch, |
a0861c02 | 3695 | [EXIT_REASON_MCE_DURING_VMENTRY] = handle_machine_check, |
68f89400 MT |
3696 | [EXIT_REASON_EPT_VIOLATION] = handle_ept_violation, |
3697 | [EXIT_REASON_EPT_MISCONFIG] = handle_ept_misconfig, | |
4b8d54f9 | 3698 | [EXIT_REASON_PAUSE_INSTRUCTION] = handle_pause, |
59708670 SY |
3699 | [EXIT_REASON_MWAIT_INSTRUCTION] = handle_invalid_op, |
3700 | [EXIT_REASON_MONITOR_INSTRUCTION] = handle_invalid_op, | |
6aa8b732 AK |
3701 | }; |
3702 | ||
3703 | static const int kvm_vmx_max_exit_handlers = | |
50a3485c | 3704 | ARRAY_SIZE(kvm_vmx_exit_handlers); |
6aa8b732 | 3705 | |
586f9607 AK |
3706 | static void vmx_get_exit_info(struct kvm_vcpu *vcpu, u64 *info1, u64 *info2) |
3707 | { | |
3708 | *info1 = vmcs_readl(EXIT_QUALIFICATION); | |
3709 | *info2 = vmcs_read32(VM_EXIT_INTR_INFO); | |
3710 | } | |
3711 | ||
6aa8b732 AK |
3712 | /* |
3713 | * The guest has exited. See if we can fix it or if we need userspace | |
3714 | * assistance. | |
3715 | */ | |
851ba692 | 3716 | static int vmx_handle_exit(struct kvm_vcpu *vcpu) |
6aa8b732 | 3717 | { |
29bd8a78 | 3718 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
a0861c02 | 3719 | u32 exit_reason = vmx->exit_reason; |
1155f76a | 3720 | u32 vectoring_info = vmx->idt_vectoring_info; |
29bd8a78 | 3721 | |
aa17911e | 3722 | trace_kvm_exit(exit_reason, vcpu, KVM_ISA_VMX); |
2714d1d3 | 3723 | |
80ced186 MG |
3724 | /* If guest state is invalid, start emulating */ |
3725 | if (vmx->emulation_required && emulate_invalid_guest_state) | |
3726 | return handle_invalid_guest_state(vcpu); | |
1d5a4d9b | 3727 | |
1439442c SY |
3728 | /* Access CR3 don't cause VMExit in paging mode, so we need |
3729 | * to sync with guest real CR3. */ | |
6de4f3ad | 3730 | if (enable_ept && is_paging(vcpu)) |
1439442c | 3731 | vcpu->arch.cr3 = vmcs_readl(GUEST_CR3); |
1439442c | 3732 | |
5120702e MG |
3733 | if (exit_reason & VMX_EXIT_REASONS_FAILED_VMENTRY) { |
3734 | vcpu->run->exit_reason = KVM_EXIT_FAIL_ENTRY; | |
3735 | vcpu->run->fail_entry.hardware_entry_failure_reason | |
3736 | = exit_reason; | |
3737 | return 0; | |
3738 | } | |
3739 | ||
29bd8a78 | 3740 | if (unlikely(vmx->fail)) { |
851ba692 AK |
3741 | vcpu->run->exit_reason = KVM_EXIT_FAIL_ENTRY; |
3742 | vcpu->run->fail_entry.hardware_entry_failure_reason | |
29bd8a78 AK |
3743 | = vmcs_read32(VM_INSTRUCTION_ERROR); |
3744 | return 0; | |
3745 | } | |
6aa8b732 | 3746 | |
d77c26fc | 3747 | if ((vectoring_info & VECTORING_INFO_VALID_MASK) && |
1439442c | 3748 | (exit_reason != EXIT_REASON_EXCEPTION_NMI && |
60637aac JK |
3749 | exit_reason != EXIT_REASON_EPT_VIOLATION && |
3750 | exit_reason != EXIT_REASON_TASK_SWITCH)) | |
3751 | printk(KERN_WARNING "%s: unexpected, valid vectoring info " | |
3752 | "(0x%x) and exit reason is 0x%x\n", | |
3753 | __func__, vectoring_info, exit_reason); | |
3b86cd99 JK |
3754 | |
3755 | if (unlikely(!cpu_has_virtual_nmis() && vmx->soft_vnmi_blocked)) { | |
c4282df9 | 3756 | if (vmx_interrupt_allowed(vcpu)) { |
3b86cd99 | 3757 | vmx->soft_vnmi_blocked = 0; |
3b86cd99 | 3758 | } else if (vmx->vnmi_blocked_time > 1000000000LL && |
4531220b | 3759 | vcpu->arch.nmi_pending) { |
3b86cd99 JK |
3760 | /* |
3761 | * This CPU don't support us in finding the end of an | |
3762 | * NMI-blocked window if the guest runs with IRQs | |
3763 | * disabled. So we pull the trigger after 1 s of | |
3764 | * futile waiting, but inform the user about this. | |
3765 | */ | |
3766 | printk(KERN_WARNING "%s: Breaking out of NMI-blocked " | |
3767 | "state on VCPU %d after 1 s timeout\n", | |
3768 | __func__, vcpu->vcpu_id); | |
3769 | vmx->soft_vnmi_blocked = 0; | |
3b86cd99 | 3770 | } |
3b86cd99 JK |
3771 | } |
3772 | ||
6aa8b732 AK |
3773 | if (exit_reason < kvm_vmx_max_exit_handlers |
3774 | && kvm_vmx_exit_handlers[exit_reason]) | |
851ba692 | 3775 | return kvm_vmx_exit_handlers[exit_reason](vcpu); |
6aa8b732 | 3776 | else { |
851ba692 AK |
3777 | vcpu->run->exit_reason = KVM_EXIT_UNKNOWN; |
3778 | vcpu->run->hw.hardware_exit_reason = exit_reason; | |
6aa8b732 AK |
3779 | } |
3780 | return 0; | |
3781 | } | |
3782 | ||
95ba8273 | 3783 | static void update_cr8_intercept(struct kvm_vcpu *vcpu, int tpr, int irr) |
6e5d865c | 3784 | { |
95ba8273 | 3785 | if (irr == -1 || tpr < irr) { |
6e5d865c YS |
3786 | vmcs_write32(TPR_THRESHOLD, 0); |
3787 | return; | |
3788 | } | |
3789 | ||
95ba8273 | 3790 | vmcs_write32(TPR_THRESHOLD, irr); |
6e5d865c YS |
3791 | } |
3792 | ||
51aa01d1 | 3793 | static void vmx_complete_atomic_exit(struct vcpu_vmx *vmx) |
cf393f75 | 3794 | { |
51aa01d1 | 3795 | u32 exit_intr_info = vmx->exit_intr_info; |
a0861c02 AK |
3796 | |
3797 | /* Handle machine checks before interrupts are enabled */ | |
3798 | if ((vmx->exit_reason == EXIT_REASON_MCE_DURING_VMENTRY) | |
3799 | || (vmx->exit_reason == EXIT_REASON_EXCEPTION_NMI | |
3800 | && is_machine_check(exit_intr_info))) | |
3801 | kvm_machine_check(); | |
3802 | ||
20f65983 GN |
3803 | /* We need to handle NMIs before interrupts are enabled */ |
3804 | if ((exit_intr_info & INTR_INFO_INTR_TYPE_MASK) == INTR_TYPE_NMI_INTR && | |
ff9d07a0 ZY |
3805 | (exit_intr_info & INTR_INFO_VALID_MASK)) { |
3806 | kvm_before_handle_nmi(&vmx->vcpu); | |
20f65983 | 3807 | asm("int $2"); |
ff9d07a0 ZY |
3808 | kvm_after_handle_nmi(&vmx->vcpu); |
3809 | } | |
51aa01d1 | 3810 | } |
20f65983 | 3811 | |
51aa01d1 AK |
3812 | static void vmx_recover_nmi_blocking(struct vcpu_vmx *vmx) |
3813 | { | |
3814 | u32 exit_intr_info = vmx->exit_intr_info; | |
3815 | bool unblock_nmi; | |
3816 | u8 vector; | |
3817 | bool idtv_info_valid; | |
3818 | ||
3819 | idtv_info_valid = vmx->idt_vectoring_info & VECTORING_INFO_VALID_MASK; | |
20f65983 | 3820 | |
cf393f75 AK |
3821 | if (cpu_has_virtual_nmis()) { |
3822 | unblock_nmi = (exit_intr_info & INTR_INFO_UNBLOCK_NMI) != 0; | |
3823 | vector = exit_intr_info & INTR_INFO_VECTOR_MASK; | |
3824 | /* | |
7b4a25cb | 3825 | * SDM 3: 27.7.1.2 (September 2008) |
cf393f75 AK |
3826 | * Re-set bit "block by NMI" before VM entry if vmexit caused by |
3827 | * a guest IRET fault. | |
7b4a25cb GN |
3828 | * SDM 3: 23.2.2 (September 2008) |
3829 | * Bit 12 is undefined in any of the following cases: | |
3830 | * If the VM exit sets the valid bit in the IDT-vectoring | |
3831 | * information field. | |
3832 | * If the VM exit is due to a double fault. | |
cf393f75 | 3833 | */ |
7b4a25cb GN |
3834 | if ((exit_intr_info & INTR_INFO_VALID_MASK) && unblock_nmi && |
3835 | vector != DF_VECTOR && !idtv_info_valid) | |
cf393f75 AK |
3836 | vmcs_set_bits(GUEST_INTERRUPTIBILITY_INFO, |
3837 | GUEST_INTR_STATE_NMI); | |
3b86cd99 JK |
3838 | } else if (unlikely(vmx->soft_vnmi_blocked)) |
3839 | vmx->vnmi_blocked_time += | |
3840 | ktime_to_ns(ktime_sub(ktime_get(), vmx->entry_time)); | |
51aa01d1 AK |
3841 | } |
3842 | ||
83422e17 AK |
3843 | static void __vmx_complete_interrupts(struct vcpu_vmx *vmx, |
3844 | u32 idt_vectoring_info, | |
3845 | int instr_len_field, | |
3846 | int error_code_field) | |
51aa01d1 | 3847 | { |
51aa01d1 AK |
3848 | u8 vector; |
3849 | int type; | |
3850 | bool idtv_info_valid; | |
3851 | ||
3852 | idtv_info_valid = idt_vectoring_info & VECTORING_INFO_VALID_MASK; | |
668f612f | 3853 | |
37b96e98 GN |
3854 | vmx->vcpu.arch.nmi_injected = false; |
3855 | kvm_clear_exception_queue(&vmx->vcpu); | |
3856 | kvm_clear_interrupt_queue(&vmx->vcpu); | |
3857 | ||
3858 | if (!idtv_info_valid) | |
3859 | return; | |
3860 | ||
3842d135 AK |
3861 | kvm_make_request(KVM_REQ_EVENT, &vmx->vcpu); |
3862 | ||
668f612f AK |
3863 | vector = idt_vectoring_info & VECTORING_INFO_VECTOR_MASK; |
3864 | type = idt_vectoring_info & VECTORING_INFO_TYPE_MASK; | |
37b96e98 | 3865 | |
64a7ec06 | 3866 | switch (type) { |
37b96e98 GN |
3867 | case INTR_TYPE_NMI_INTR: |
3868 | vmx->vcpu.arch.nmi_injected = true; | |
668f612f | 3869 | /* |
7b4a25cb | 3870 | * SDM 3: 27.7.1.2 (September 2008) |
37b96e98 GN |
3871 | * Clear bit "block by NMI" before VM entry if a NMI |
3872 | * delivery faulted. | |
668f612f | 3873 | */ |
37b96e98 GN |
3874 | vmcs_clear_bits(GUEST_INTERRUPTIBILITY_INFO, |
3875 | GUEST_INTR_STATE_NMI); | |
3876 | break; | |
37b96e98 | 3877 | case INTR_TYPE_SOFT_EXCEPTION: |
66fd3f7f | 3878 | vmx->vcpu.arch.event_exit_inst_len = |
83422e17 | 3879 | vmcs_read32(instr_len_field); |
66fd3f7f GN |
3880 | /* fall through */ |
3881 | case INTR_TYPE_HARD_EXCEPTION: | |
35920a35 | 3882 | if (idt_vectoring_info & VECTORING_INFO_DELIVER_CODE_MASK) { |
83422e17 | 3883 | u32 err = vmcs_read32(error_code_field); |
37b96e98 | 3884 | kvm_queue_exception_e(&vmx->vcpu, vector, err); |
35920a35 AK |
3885 | } else |
3886 | kvm_queue_exception(&vmx->vcpu, vector); | |
37b96e98 | 3887 | break; |
66fd3f7f GN |
3888 | case INTR_TYPE_SOFT_INTR: |
3889 | vmx->vcpu.arch.event_exit_inst_len = | |
83422e17 | 3890 | vmcs_read32(instr_len_field); |
66fd3f7f | 3891 | /* fall through */ |
37b96e98 | 3892 | case INTR_TYPE_EXT_INTR: |
66fd3f7f GN |
3893 | kvm_queue_interrupt(&vmx->vcpu, vector, |
3894 | type == INTR_TYPE_SOFT_INTR); | |
37b96e98 GN |
3895 | break; |
3896 | default: | |
3897 | break; | |
f7d9238f | 3898 | } |
cf393f75 AK |
3899 | } |
3900 | ||
83422e17 AK |
3901 | static void vmx_complete_interrupts(struct vcpu_vmx *vmx) |
3902 | { | |
3903 | __vmx_complete_interrupts(vmx, vmx->idt_vectoring_info, | |
3904 | VM_EXIT_INSTRUCTION_LEN, | |
3905 | IDT_VECTORING_ERROR_CODE); | |
3906 | } | |
3907 | ||
b463a6f7 AK |
3908 | static void vmx_cancel_injection(struct kvm_vcpu *vcpu) |
3909 | { | |
3910 | __vmx_complete_interrupts(to_vmx(vcpu), | |
3911 | vmcs_read32(VM_ENTRY_INTR_INFO_FIELD), | |
3912 | VM_ENTRY_INSTRUCTION_LEN, | |
3913 | VM_ENTRY_EXCEPTION_ERROR_CODE); | |
3914 | ||
3915 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, 0); | |
3916 | } | |
3917 | ||
c801949d AK |
3918 | #ifdef CONFIG_X86_64 |
3919 | #define R "r" | |
3920 | #define Q "q" | |
3921 | #else | |
3922 | #define R "e" | |
3923 | #define Q "l" | |
3924 | #endif | |
3925 | ||
104f226b | 3926 | static void vmx_vcpu_run(struct kvm_vcpu *vcpu) |
6aa8b732 | 3927 | { |
a2fa3e9f | 3928 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
104f226b AK |
3929 | |
3930 | /* Record the guest's net vcpu time for enforced NMI injections. */ | |
3931 | if (unlikely(!cpu_has_virtual_nmis() && vmx->soft_vnmi_blocked)) | |
3932 | vmx->entry_time = ktime_get(); | |
3933 | ||
3934 | /* Don't enter VMX if guest state is invalid, let the exit handler | |
3935 | start emulation until we arrive back to a valid state */ | |
3936 | if (vmx->emulation_required && emulate_invalid_guest_state) | |
3937 | return; | |
3938 | ||
3939 | if (test_bit(VCPU_REGS_RSP, (unsigned long *)&vcpu->arch.regs_dirty)) | |
3940 | vmcs_writel(GUEST_RSP, vcpu->arch.regs[VCPU_REGS_RSP]); | |
3941 | if (test_bit(VCPU_REGS_RIP, (unsigned long *)&vcpu->arch.regs_dirty)) | |
3942 | vmcs_writel(GUEST_RIP, vcpu->arch.regs[VCPU_REGS_RIP]); | |
3943 | ||
3944 | /* When single-stepping over STI and MOV SS, we must clear the | |
3945 | * corresponding interruptibility bits in the guest state. Otherwise | |
3946 | * vmentry fails as it then expects bit 14 (BS) in pending debug | |
3947 | * exceptions being set, but that's not correct for the guest debugging | |
3948 | * case. */ | |
3949 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) | |
3950 | vmx_set_interrupt_shadow(vcpu, 0); | |
3951 | ||
3952 | asm( | |
6aa8b732 | 3953 | /* Store host registers */ |
c801949d AK |
3954 | "push %%"R"dx; push %%"R"bp;" |
3955 | "push %%"R"cx \n\t" | |
313dbd49 AK |
3956 | "cmp %%"R"sp, %c[host_rsp](%0) \n\t" |
3957 | "je 1f \n\t" | |
3958 | "mov %%"R"sp, %c[host_rsp](%0) \n\t" | |
4ecac3fd | 3959 | __ex(ASM_VMX_VMWRITE_RSP_RDX) "\n\t" |
313dbd49 | 3960 | "1: \n\t" |
d3edefc0 AK |
3961 | /* Reload cr2 if changed */ |
3962 | "mov %c[cr2](%0), %%"R"ax \n\t" | |
3963 | "mov %%cr2, %%"R"dx \n\t" | |
3964 | "cmp %%"R"ax, %%"R"dx \n\t" | |
3965 | "je 2f \n\t" | |
3966 | "mov %%"R"ax, %%cr2 \n\t" | |
3967 | "2: \n\t" | |
6aa8b732 | 3968 | /* Check if vmlaunch of vmresume is needed */ |
e08aa78a | 3969 | "cmpl $0, %c[launched](%0) \n\t" |
6aa8b732 | 3970 | /* Load guest registers. Don't clobber flags. */ |
c801949d AK |
3971 | "mov %c[rax](%0), %%"R"ax \n\t" |
3972 | "mov %c[rbx](%0), %%"R"bx \n\t" | |
3973 | "mov %c[rdx](%0), %%"R"dx \n\t" | |
3974 | "mov %c[rsi](%0), %%"R"si \n\t" | |
3975 | "mov %c[rdi](%0), %%"R"di \n\t" | |
3976 | "mov %c[rbp](%0), %%"R"bp \n\t" | |
05b3e0c2 | 3977 | #ifdef CONFIG_X86_64 |
e08aa78a AK |
3978 | "mov %c[r8](%0), %%r8 \n\t" |
3979 | "mov %c[r9](%0), %%r9 \n\t" | |
3980 | "mov %c[r10](%0), %%r10 \n\t" | |
3981 | "mov %c[r11](%0), %%r11 \n\t" | |
3982 | "mov %c[r12](%0), %%r12 \n\t" | |
3983 | "mov %c[r13](%0), %%r13 \n\t" | |
3984 | "mov %c[r14](%0), %%r14 \n\t" | |
3985 | "mov %c[r15](%0), %%r15 \n\t" | |
6aa8b732 | 3986 | #endif |
c801949d AK |
3987 | "mov %c[rcx](%0), %%"R"cx \n\t" /* kills %0 (ecx) */ |
3988 | ||
6aa8b732 | 3989 | /* Enter guest mode */ |
cd2276a7 | 3990 | "jne .Llaunched \n\t" |
4ecac3fd | 3991 | __ex(ASM_VMX_VMLAUNCH) "\n\t" |
cd2276a7 | 3992 | "jmp .Lkvm_vmx_return \n\t" |
4ecac3fd | 3993 | ".Llaunched: " __ex(ASM_VMX_VMRESUME) "\n\t" |
cd2276a7 | 3994 | ".Lkvm_vmx_return: " |
6aa8b732 | 3995 | /* Save guest registers, load host registers, keep flags */ |
c801949d AK |
3996 | "xchg %0, (%%"R"sp) \n\t" |
3997 | "mov %%"R"ax, %c[rax](%0) \n\t" | |
3998 | "mov %%"R"bx, %c[rbx](%0) \n\t" | |
3999 | "push"Q" (%%"R"sp); pop"Q" %c[rcx](%0) \n\t" | |
4000 | "mov %%"R"dx, %c[rdx](%0) \n\t" | |
4001 | "mov %%"R"si, %c[rsi](%0) \n\t" | |
4002 | "mov %%"R"di, %c[rdi](%0) \n\t" | |
4003 | "mov %%"R"bp, %c[rbp](%0) \n\t" | |
05b3e0c2 | 4004 | #ifdef CONFIG_X86_64 |
e08aa78a AK |
4005 | "mov %%r8, %c[r8](%0) \n\t" |
4006 | "mov %%r9, %c[r9](%0) \n\t" | |
4007 | "mov %%r10, %c[r10](%0) \n\t" | |
4008 | "mov %%r11, %c[r11](%0) \n\t" | |
4009 | "mov %%r12, %c[r12](%0) \n\t" | |
4010 | "mov %%r13, %c[r13](%0) \n\t" | |
4011 | "mov %%r14, %c[r14](%0) \n\t" | |
4012 | "mov %%r15, %c[r15](%0) \n\t" | |
6aa8b732 | 4013 | #endif |
c801949d AK |
4014 | "mov %%cr2, %%"R"ax \n\t" |
4015 | "mov %%"R"ax, %c[cr2](%0) \n\t" | |
4016 | ||
4017 | "pop %%"R"bp; pop %%"R"bp; pop %%"R"dx \n\t" | |
e08aa78a AK |
4018 | "setbe %c[fail](%0) \n\t" |
4019 | : : "c"(vmx), "d"((unsigned long)HOST_RSP), | |
4020 | [launched]"i"(offsetof(struct vcpu_vmx, launched)), | |
4021 | [fail]"i"(offsetof(struct vcpu_vmx, fail)), | |
313dbd49 | 4022 | [host_rsp]"i"(offsetof(struct vcpu_vmx, host_rsp)), |
ad312c7c ZX |
4023 | [rax]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RAX])), |
4024 | [rbx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RBX])), | |
4025 | [rcx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RCX])), | |
4026 | [rdx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RDX])), | |
4027 | [rsi]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RSI])), | |
4028 | [rdi]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RDI])), | |
4029 | [rbp]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RBP])), | |
05b3e0c2 | 4030 | #ifdef CONFIG_X86_64 |
ad312c7c ZX |
4031 | [r8]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R8])), |
4032 | [r9]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R9])), | |
4033 | [r10]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R10])), | |
4034 | [r11]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R11])), | |
4035 | [r12]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R12])), | |
4036 | [r13]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R13])), | |
4037 | [r14]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R14])), | |
4038 | [r15]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R15])), | |
6aa8b732 | 4039 | #endif |
ad312c7c | 4040 | [cr2]"i"(offsetof(struct vcpu_vmx, vcpu.arch.cr2)) |
c2036300 | 4041 | : "cc", "memory" |
07d6f555 | 4042 | , R"ax", R"bx", R"di", R"si" |
c2036300 | 4043 | #ifdef CONFIG_X86_64 |
c2036300 LV |
4044 | , "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15" |
4045 | #endif | |
4046 | ); | |
6aa8b732 | 4047 | |
6de4f3ad AK |
4048 | vcpu->arch.regs_avail = ~((1 << VCPU_REGS_RIP) | (1 << VCPU_REGS_RSP) |
4049 | | (1 << VCPU_EXREG_PDPTR)); | |
5fdbf976 MT |
4050 | vcpu->arch.regs_dirty = 0; |
4051 | ||
1155f76a AK |
4052 | vmx->idt_vectoring_info = vmcs_read32(IDT_VECTORING_INFO_FIELD); |
4053 | ||
d77c26fc | 4054 | asm("mov %0, %%ds; mov %0, %%es" : : "r"(__USER_DS)); |
15ad7146 | 4055 | vmx->launched = 1; |
1b6269db | 4056 | |
51aa01d1 AK |
4057 | vmx->exit_reason = vmcs_read32(VM_EXIT_REASON); |
4058 | vmx->exit_intr_info = vmcs_read32(VM_EXIT_INTR_INFO); | |
4059 | ||
4060 | vmx_complete_atomic_exit(vmx); | |
4061 | vmx_recover_nmi_blocking(vmx); | |
cf393f75 | 4062 | vmx_complete_interrupts(vmx); |
6aa8b732 AK |
4063 | } |
4064 | ||
c801949d AK |
4065 | #undef R |
4066 | #undef Q | |
4067 | ||
6aa8b732 AK |
4068 | static void vmx_free_vmcs(struct kvm_vcpu *vcpu) |
4069 | { | |
a2fa3e9f GH |
4070 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
4071 | ||
4072 | if (vmx->vmcs) { | |
543e4243 | 4073 | vcpu_clear(vmx); |
a2fa3e9f GH |
4074 | free_vmcs(vmx->vmcs); |
4075 | vmx->vmcs = NULL; | |
6aa8b732 AK |
4076 | } |
4077 | } | |
4078 | ||
4079 | static void vmx_free_vcpu(struct kvm_vcpu *vcpu) | |
4080 | { | |
fb3f0f51 RR |
4081 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
4082 | ||
cdbecfc3 | 4083 | free_vpid(vmx); |
6aa8b732 | 4084 | vmx_free_vmcs(vcpu); |
fb3f0f51 RR |
4085 | kfree(vmx->guest_msrs); |
4086 | kvm_vcpu_uninit(vcpu); | |
a4770347 | 4087 | kmem_cache_free(kvm_vcpu_cache, vmx); |
6aa8b732 AK |
4088 | } |
4089 | ||
4610c9cc DX |
4090 | static inline void vmcs_init(struct vmcs *vmcs) |
4091 | { | |
4092 | u64 phys_addr = __pa(per_cpu(vmxarea, raw_smp_processor_id())); | |
4093 | ||
4094 | if (!vmm_exclusive) | |
4095 | kvm_cpu_vmxon(phys_addr); | |
4096 | ||
4097 | vmcs_clear(vmcs); | |
4098 | ||
4099 | if (!vmm_exclusive) | |
4100 | kvm_cpu_vmxoff(); | |
4101 | } | |
4102 | ||
fb3f0f51 | 4103 | static struct kvm_vcpu *vmx_create_vcpu(struct kvm *kvm, unsigned int id) |
6aa8b732 | 4104 | { |
fb3f0f51 | 4105 | int err; |
c16f862d | 4106 | struct vcpu_vmx *vmx = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); |
15ad7146 | 4107 | int cpu; |
6aa8b732 | 4108 | |
a2fa3e9f | 4109 | if (!vmx) |
fb3f0f51 RR |
4110 | return ERR_PTR(-ENOMEM); |
4111 | ||
2384d2b3 SY |
4112 | allocate_vpid(vmx); |
4113 | ||
fb3f0f51 RR |
4114 | err = kvm_vcpu_init(&vmx->vcpu, kvm, id); |
4115 | if (err) | |
4116 | goto free_vcpu; | |
965b58a5 | 4117 | |
a2fa3e9f | 4118 | vmx->guest_msrs = kmalloc(PAGE_SIZE, GFP_KERNEL); |
fb3f0f51 RR |
4119 | if (!vmx->guest_msrs) { |
4120 | err = -ENOMEM; | |
4121 | goto uninit_vcpu; | |
4122 | } | |
965b58a5 | 4123 | |
a2fa3e9f GH |
4124 | vmx->vmcs = alloc_vmcs(); |
4125 | if (!vmx->vmcs) | |
fb3f0f51 | 4126 | goto free_msrs; |
a2fa3e9f | 4127 | |
4610c9cc | 4128 | vmcs_init(vmx->vmcs); |
a2fa3e9f | 4129 | |
15ad7146 AK |
4130 | cpu = get_cpu(); |
4131 | vmx_vcpu_load(&vmx->vcpu, cpu); | |
e48672fa | 4132 | vmx->vcpu.cpu = cpu; |
8b9cf98c | 4133 | err = vmx_vcpu_setup(vmx); |
fb3f0f51 | 4134 | vmx_vcpu_put(&vmx->vcpu); |
15ad7146 | 4135 | put_cpu(); |
fb3f0f51 RR |
4136 | if (err) |
4137 | goto free_vmcs; | |
5e4a0b3c MT |
4138 | if (vm_need_virtualize_apic_accesses(kvm)) |
4139 | if (alloc_apic_access_page(kvm) != 0) | |
4140 | goto free_vmcs; | |
fb3f0f51 | 4141 | |
b927a3ce SY |
4142 | if (enable_ept) { |
4143 | if (!kvm->arch.ept_identity_map_addr) | |
4144 | kvm->arch.ept_identity_map_addr = | |
4145 | VMX_EPT_IDENTITY_PAGETABLE_ADDR; | |
b7ebfb05 SY |
4146 | if (alloc_identity_pagetable(kvm) != 0) |
4147 | goto free_vmcs; | |
b927a3ce | 4148 | } |
b7ebfb05 | 4149 | |
fb3f0f51 RR |
4150 | return &vmx->vcpu; |
4151 | ||
4152 | free_vmcs: | |
4153 | free_vmcs(vmx->vmcs); | |
4154 | free_msrs: | |
fb3f0f51 RR |
4155 | kfree(vmx->guest_msrs); |
4156 | uninit_vcpu: | |
4157 | kvm_vcpu_uninit(&vmx->vcpu); | |
4158 | free_vcpu: | |
cdbecfc3 | 4159 | free_vpid(vmx); |
a4770347 | 4160 | kmem_cache_free(kvm_vcpu_cache, vmx); |
fb3f0f51 | 4161 | return ERR_PTR(err); |
6aa8b732 AK |
4162 | } |
4163 | ||
002c7f7c YS |
4164 | static void __init vmx_check_processor_compat(void *rtn) |
4165 | { | |
4166 | struct vmcs_config vmcs_conf; | |
4167 | ||
4168 | *(int *)rtn = 0; | |
4169 | if (setup_vmcs_config(&vmcs_conf) < 0) | |
4170 | *(int *)rtn = -EIO; | |
4171 | if (memcmp(&vmcs_config, &vmcs_conf, sizeof(struct vmcs_config)) != 0) { | |
4172 | printk(KERN_ERR "kvm: CPU %d feature inconsistency!\n", | |
4173 | smp_processor_id()); | |
4174 | *(int *)rtn = -EIO; | |
4175 | } | |
4176 | } | |
4177 | ||
67253af5 SY |
4178 | static int get_ept_level(void) |
4179 | { | |
4180 | return VMX_EPT_DEFAULT_GAW + 1; | |
4181 | } | |
4182 | ||
4b12f0de | 4183 | static u64 vmx_get_mt_mask(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio) |
64d4d521 | 4184 | { |
4b12f0de SY |
4185 | u64 ret; |
4186 | ||
522c68c4 SY |
4187 | /* For VT-d and EPT combination |
4188 | * 1. MMIO: always map as UC | |
4189 | * 2. EPT with VT-d: | |
4190 | * a. VT-d without snooping control feature: can't guarantee the | |
4191 | * result, try to trust guest. | |
4192 | * b. VT-d with snooping control feature: snooping control feature of | |
4193 | * VT-d engine can guarantee the cache correctness. Just set it | |
4194 | * to WB to keep consistent with host. So the same as item 3. | |
a19a6d11 | 4195 | * 3. EPT without VT-d: always map as WB and set IPAT=1 to keep |
522c68c4 SY |
4196 | * consistent with host MTRR |
4197 | */ | |
4b12f0de SY |
4198 | if (is_mmio) |
4199 | ret = MTRR_TYPE_UNCACHABLE << VMX_EPT_MT_EPTE_SHIFT; | |
522c68c4 SY |
4200 | else if (vcpu->kvm->arch.iommu_domain && |
4201 | !(vcpu->kvm->arch.iommu_flags & KVM_IOMMU_CACHE_COHERENCY)) | |
4202 | ret = kvm_get_guest_memory_type(vcpu, gfn) << | |
4203 | VMX_EPT_MT_EPTE_SHIFT; | |
4b12f0de | 4204 | else |
522c68c4 | 4205 | ret = (MTRR_TYPE_WRBACK << VMX_EPT_MT_EPTE_SHIFT) |
a19a6d11 | 4206 | | VMX_EPT_IPAT_BIT; |
4b12f0de SY |
4207 | |
4208 | return ret; | |
64d4d521 SY |
4209 | } |
4210 | ||
f4c9e87c AK |
4211 | #define _ER(x) { EXIT_REASON_##x, #x } |
4212 | ||
229456fc | 4213 | static const struct trace_print_flags vmx_exit_reasons_str[] = { |
f4c9e87c AK |
4214 | _ER(EXCEPTION_NMI), |
4215 | _ER(EXTERNAL_INTERRUPT), | |
4216 | _ER(TRIPLE_FAULT), | |
4217 | _ER(PENDING_INTERRUPT), | |
4218 | _ER(NMI_WINDOW), | |
4219 | _ER(TASK_SWITCH), | |
4220 | _ER(CPUID), | |
4221 | _ER(HLT), | |
4222 | _ER(INVLPG), | |
4223 | _ER(RDPMC), | |
4224 | _ER(RDTSC), | |
4225 | _ER(VMCALL), | |
4226 | _ER(VMCLEAR), | |
4227 | _ER(VMLAUNCH), | |
4228 | _ER(VMPTRLD), | |
4229 | _ER(VMPTRST), | |
4230 | _ER(VMREAD), | |
4231 | _ER(VMRESUME), | |
4232 | _ER(VMWRITE), | |
4233 | _ER(VMOFF), | |
4234 | _ER(VMON), | |
4235 | _ER(CR_ACCESS), | |
4236 | _ER(DR_ACCESS), | |
4237 | _ER(IO_INSTRUCTION), | |
4238 | _ER(MSR_READ), | |
4239 | _ER(MSR_WRITE), | |
4240 | _ER(MWAIT_INSTRUCTION), | |
4241 | _ER(MONITOR_INSTRUCTION), | |
4242 | _ER(PAUSE_INSTRUCTION), | |
4243 | _ER(MCE_DURING_VMENTRY), | |
4244 | _ER(TPR_BELOW_THRESHOLD), | |
4245 | _ER(APIC_ACCESS), | |
4246 | _ER(EPT_VIOLATION), | |
4247 | _ER(EPT_MISCONFIG), | |
4248 | _ER(WBINVD), | |
229456fc MT |
4249 | { -1, NULL } |
4250 | }; | |
4251 | ||
f4c9e87c AK |
4252 | #undef _ER |
4253 | ||
17cc3935 | 4254 | static int vmx_get_lpage_level(void) |
344f414f | 4255 | { |
878403b7 SY |
4256 | if (enable_ept && !cpu_has_vmx_ept_1g_page()) |
4257 | return PT_DIRECTORY_LEVEL; | |
4258 | else | |
4259 | /* For shadow and EPT supported 1GB page */ | |
4260 | return PT_PDPE_LEVEL; | |
344f414f JR |
4261 | } |
4262 | ||
0e851880 SY |
4263 | static void vmx_cpuid_update(struct kvm_vcpu *vcpu) |
4264 | { | |
4e47c7a6 SY |
4265 | struct kvm_cpuid_entry2 *best; |
4266 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
4267 | u32 exec_control; | |
4268 | ||
4269 | vmx->rdtscp_enabled = false; | |
4270 | if (vmx_rdtscp_supported()) { | |
4271 | exec_control = vmcs_read32(SECONDARY_VM_EXEC_CONTROL); | |
4272 | if (exec_control & SECONDARY_EXEC_RDTSCP) { | |
4273 | best = kvm_find_cpuid_entry(vcpu, 0x80000001, 0); | |
4274 | if (best && (best->edx & bit(X86_FEATURE_RDTSCP))) | |
4275 | vmx->rdtscp_enabled = true; | |
4276 | else { | |
4277 | exec_control &= ~SECONDARY_EXEC_RDTSCP; | |
4278 | vmcs_write32(SECONDARY_VM_EXEC_CONTROL, | |
4279 | exec_control); | |
4280 | } | |
4281 | } | |
4282 | } | |
0e851880 SY |
4283 | } |
4284 | ||
d4330ef2 JR |
4285 | static void vmx_set_supported_cpuid(u32 func, struct kvm_cpuid_entry2 *entry) |
4286 | { | |
4287 | } | |
4288 | ||
cbdd1bea | 4289 | static struct kvm_x86_ops vmx_x86_ops = { |
6aa8b732 AK |
4290 | .cpu_has_kvm_support = cpu_has_kvm_support, |
4291 | .disabled_by_bios = vmx_disabled_by_bios, | |
4292 | .hardware_setup = hardware_setup, | |
4293 | .hardware_unsetup = hardware_unsetup, | |
002c7f7c | 4294 | .check_processor_compatibility = vmx_check_processor_compat, |
6aa8b732 AK |
4295 | .hardware_enable = hardware_enable, |
4296 | .hardware_disable = hardware_disable, | |
04547156 | 4297 | .cpu_has_accelerated_tpr = report_flexpriority, |
6aa8b732 AK |
4298 | |
4299 | .vcpu_create = vmx_create_vcpu, | |
4300 | .vcpu_free = vmx_free_vcpu, | |
04d2cc77 | 4301 | .vcpu_reset = vmx_vcpu_reset, |
6aa8b732 | 4302 | |
04d2cc77 | 4303 | .prepare_guest_switch = vmx_save_host_state, |
6aa8b732 AK |
4304 | .vcpu_load = vmx_vcpu_load, |
4305 | .vcpu_put = vmx_vcpu_put, | |
4306 | ||
4307 | .set_guest_debug = set_guest_debug, | |
4308 | .get_msr = vmx_get_msr, | |
4309 | .set_msr = vmx_set_msr, | |
4310 | .get_segment_base = vmx_get_segment_base, | |
4311 | .get_segment = vmx_get_segment, | |
4312 | .set_segment = vmx_set_segment, | |
2e4d2653 | 4313 | .get_cpl = vmx_get_cpl, |
6aa8b732 | 4314 | .get_cs_db_l_bits = vmx_get_cs_db_l_bits, |
e8467fda | 4315 | .decache_cr0_guest_bits = vmx_decache_cr0_guest_bits, |
25c4c276 | 4316 | .decache_cr4_guest_bits = vmx_decache_cr4_guest_bits, |
6aa8b732 | 4317 | .set_cr0 = vmx_set_cr0, |
6aa8b732 AK |
4318 | .set_cr3 = vmx_set_cr3, |
4319 | .set_cr4 = vmx_set_cr4, | |
6aa8b732 | 4320 | .set_efer = vmx_set_efer, |
6aa8b732 AK |
4321 | .get_idt = vmx_get_idt, |
4322 | .set_idt = vmx_set_idt, | |
4323 | .get_gdt = vmx_get_gdt, | |
4324 | .set_gdt = vmx_set_gdt, | |
020df079 | 4325 | .set_dr7 = vmx_set_dr7, |
5fdbf976 | 4326 | .cache_reg = vmx_cache_reg, |
6aa8b732 AK |
4327 | .get_rflags = vmx_get_rflags, |
4328 | .set_rflags = vmx_set_rflags, | |
ebcbab4c | 4329 | .fpu_activate = vmx_fpu_activate, |
02daab21 | 4330 | .fpu_deactivate = vmx_fpu_deactivate, |
6aa8b732 AK |
4331 | |
4332 | .tlb_flush = vmx_flush_tlb, | |
6aa8b732 | 4333 | |
6aa8b732 | 4334 | .run = vmx_vcpu_run, |
6062d012 | 4335 | .handle_exit = vmx_handle_exit, |
6aa8b732 | 4336 | .skip_emulated_instruction = skip_emulated_instruction, |
2809f5d2 GC |
4337 | .set_interrupt_shadow = vmx_set_interrupt_shadow, |
4338 | .get_interrupt_shadow = vmx_get_interrupt_shadow, | |
102d8325 | 4339 | .patch_hypercall = vmx_patch_hypercall, |
2a8067f1 | 4340 | .set_irq = vmx_inject_irq, |
95ba8273 | 4341 | .set_nmi = vmx_inject_nmi, |
298101da | 4342 | .queue_exception = vmx_queue_exception, |
b463a6f7 | 4343 | .cancel_injection = vmx_cancel_injection, |
78646121 | 4344 | .interrupt_allowed = vmx_interrupt_allowed, |
95ba8273 | 4345 | .nmi_allowed = vmx_nmi_allowed, |
3cfc3092 JK |
4346 | .get_nmi_mask = vmx_get_nmi_mask, |
4347 | .set_nmi_mask = vmx_set_nmi_mask, | |
95ba8273 GN |
4348 | .enable_nmi_window = enable_nmi_window, |
4349 | .enable_irq_window = enable_irq_window, | |
4350 | .update_cr8_intercept = update_cr8_intercept, | |
95ba8273 | 4351 | |
cbc94022 | 4352 | .set_tss_addr = vmx_set_tss_addr, |
67253af5 | 4353 | .get_tdp_level = get_ept_level, |
4b12f0de | 4354 | .get_mt_mask = vmx_get_mt_mask, |
229456fc | 4355 | |
586f9607 | 4356 | .get_exit_info = vmx_get_exit_info, |
229456fc | 4357 | .exit_reasons_str = vmx_exit_reasons_str, |
586f9607 | 4358 | |
17cc3935 | 4359 | .get_lpage_level = vmx_get_lpage_level, |
0e851880 SY |
4360 | |
4361 | .cpuid_update = vmx_cpuid_update, | |
4e47c7a6 SY |
4362 | |
4363 | .rdtscp_supported = vmx_rdtscp_supported, | |
d4330ef2 JR |
4364 | |
4365 | .set_supported_cpuid = vmx_set_supported_cpuid, | |
f5f48ee1 SY |
4366 | |
4367 | .has_wbinvd_exit = cpu_has_vmx_wbinvd_exit, | |
99e3e30a ZA |
4368 | |
4369 | .write_tsc_offset = vmx_write_tsc_offset, | |
e48672fa | 4370 | .adjust_tsc_offset = vmx_adjust_tsc_offset, |
1c97f0a0 JR |
4371 | |
4372 | .set_tdp_cr3 = vmx_set_cr3, | |
6aa8b732 AK |
4373 | }; |
4374 | ||
4375 | static int __init vmx_init(void) | |
4376 | { | |
26bb0981 AK |
4377 | int r, i; |
4378 | ||
4379 | rdmsrl_safe(MSR_EFER, &host_efer); | |
4380 | ||
4381 | for (i = 0; i < NR_VMX_MSR; ++i) | |
4382 | kvm_define_shared_msr(i, vmx_msr_index[i]); | |
fdef3ad1 | 4383 | |
3e7c73e9 | 4384 | vmx_io_bitmap_a = (unsigned long *)__get_free_page(GFP_KERNEL); |
fdef3ad1 HQ |
4385 | if (!vmx_io_bitmap_a) |
4386 | return -ENOMEM; | |
4387 | ||
3e7c73e9 | 4388 | vmx_io_bitmap_b = (unsigned long *)__get_free_page(GFP_KERNEL); |
fdef3ad1 HQ |
4389 | if (!vmx_io_bitmap_b) { |
4390 | r = -ENOMEM; | |
4391 | goto out; | |
4392 | } | |
4393 | ||
5897297b AK |
4394 | vmx_msr_bitmap_legacy = (unsigned long *)__get_free_page(GFP_KERNEL); |
4395 | if (!vmx_msr_bitmap_legacy) { | |
25c5f225 SY |
4396 | r = -ENOMEM; |
4397 | goto out1; | |
4398 | } | |
4399 | ||
5897297b AK |
4400 | vmx_msr_bitmap_longmode = (unsigned long *)__get_free_page(GFP_KERNEL); |
4401 | if (!vmx_msr_bitmap_longmode) { | |
4402 | r = -ENOMEM; | |
4403 | goto out2; | |
4404 | } | |
4405 | ||
fdef3ad1 HQ |
4406 | /* |
4407 | * Allow direct access to the PC debug port (it is often used for I/O | |
4408 | * delays, but the vmexits simply slow things down). | |
4409 | */ | |
3e7c73e9 AK |
4410 | memset(vmx_io_bitmap_a, 0xff, PAGE_SIZE); |
4411 | clear_bit(0x80, vmx_io_bitmap_a); | |
fdef3ad1 | 4412 | |
3e7c73e9 | 4413 | memset(vmx_io_bitmap_b, 0xff, PAGE_SIZE); |
fdef3ad1 | 4414 | |
5897297b AK |
4415 | memset(vmx_msr_bitmap_legacy, 0xff, PAGE_SIZE); |
4416 | memset(vmx_msr_bitmap_longmode, 0xff, PAGE_SIZE); | |
25c5f225 | 4417 | |
2384d2b3 SY |
4418 | set_bit(0, vmx_vpid_bitmap); /* 0 is reserved for host */ |
4419 | ||
0ee75bea AK |
4420 | r = kvm_init(&vmx_x86_ops, sizeof(struct vcpu_vmx), |
4421 | __alignof__(struct vcpu_vmx), THIS_MODULE); | |
fdef3ad1 | 4422 | if (r) |
5897297b | 4423 | goto out3; |
25c5f225 | 4424 | |
5897297b AK |
4425 | vmx_disable_intercept_for_msr(MSR_FS_BASE, false); |
4426 | vmx_disable_intercept_for_msr(MSR_GS_BASE, false); | |
4427 | vmx_disable_intercept_for_msr(MSR_KERNEL_GS_BASE, true); | |
4428 | vmx_disable_intercept_for_msr(MSR_IA32_SYSENTER_CS, false); | |
4429 | vmx_disable_intercept_for_msr(MSR_IA32_SYSENTER_ESP, false); | |
4430 | vmx_disable_intercept_for_msr(MSR_IA32_SYSENTER_EIP, false); | |
fdef3ad1 | 4431 | |
089d034e | 4432 | if (enable_ept) { |
1439442c | 4433 | bypass_guest_pf = 0; |
534e38b4 | 4434 | kvm_mmu_set_mask_ptes(0ull, 0ull, 0ull, 0ull, |
4b12f0de | 4435 | VMX_EPT_EXECUTABLE_MASK); |
5fdbcb9d SY |
4436 | kvm_enable_tdp(); |
4437 | } else | |
4438 | kvm_disable_tdp(); | |
1439442c | 4439 | |
c7addb90 AK |
4440 | if (bypass_guest_pf) |
4441 | kvm_mmu_set_nonpresent_ptes(~0xffeull, 0ull); | |
4442 | ||
fdef3ad1 HQ |
4443 | return 0; |
4444 | ||
5897297b AK |
4445 | out3: |
4446 | free_page((unsigned long)vmx_msr_bitmap_longmode); | |
25c5f225 | 4447 | out2: |
5897297b | 4448 | free_page((unsigned long)vmx_msr_bitmap_legacy); |
fdef3ad1 | 4449 | out1: |
3e7c73e9 | 4450 | free_page((unsigned long)vmx_io_bitmap_b); |
fdef3ad1 | 4451 | out: |
3e7c73e9 | 4452 | free_page((unsigned long)vmx_io_bitmap_a); |
fdef3ad1 | 4453 | return r; |
6aa8b732 AK |
4454 | } |
4455 | ||
4456 | static void __exit vmx_exit(void) | |
4457 | { | |
5897297b AK |
4458 | free_page((unsigned long)vmx_msr_bitmap_legacy); |
4459 | free_page((unsigned long)vmx_msr_bitmap_longmode); | |
3e7c73e9 AK |
4460 | free_page((unsigned long)vmx_io_bitmap_b); |
4461 | free_page((unsigned long)vmx_io_bitmap_a); | |
fdef3ad1 | 4462 | |
cb498ea2 | 4463 | kvm_exit(); |
6aa8b732 AK |
4464 | } |
4465 | ||
4466 | module_init(vmx_init) | |
4467 | module_exit(vmx_exit) |