Commit | Line | Data |
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6aa8b732 AK |
1 | /* |
2 | * Kernel-based Virtual Machine driver for Linux | |
3 | * | |
4 | * AMD SVM support | |
5 | * | |
6 | * Copyright (C) 2006 Qumranet, Inc. | |
9611c187 | 7 | * Copyright 2010 Red Hat, Inc. and/or its affiliates. |
6aa8b732 AK |
8 | * |
9 | * Authors: | |
10 | * Yaniv Kamay <yaniv@qumranet.com> | |
11 | * Avi Kivity <avi@qumranet.com> | |
12 | * | |
13 | * This work is licensed under the terms of the GNU GPL, version 2. See | |
14 | * the COPYING file in the top-level directory. | |
15 | * | |
16 | */ | |
edf88417 AK |
17 | #include <linux/kvm_host.h> |
18 | ||
85f455f7 | 19 | #include "irq.h" |
1d737c8a | 20 | #include "mmu.h" |
5fdbf976 | 21 | #include "kvm_cache_regs.h" |
fe4c7b19 | 22 | #include "x86.h" |
e495606d | 23 | |
6aa8b732 | 24 | #include <linux/module.h> |
9d8f549d | 25 | #include <linux/kernel.h> |
6aa8b732 AK |
26 | #include <linux/vmalloc.h> |
27 | #include <linux/highmem.h> | |
e8edc6e0 | 28 | #include <linux/sched.h> |
229456fc | 29 | #include <linux/ftrace_event.h> |
5a0e3ad6 | 30 | #include <linux/slab.h> |
6aa8b732 | 31 | |
67ec6607 | 32 | #include <asm/tlbflush.h> |
e495606d | 33 | #include <asm/desc.h> |
631bc487 | 34 | #include <asm/kvm_para.h> |
6aa8b732 | 35 | |
63d1142f | 36 | #include <asm/virtext.h> |
229456fc | 37 | #include "trace.h" |
63d1142f | 38 | |
4ecac3fd AK |
39 | #define __ex(x) __kvm_handle_fault_on_reboot(x) |
40 | ||
6aa8b732 AK |
41 | MODULE_AUTHOR("Qumranet"); |
42 | MODULE_LICENSE("GPL"); | |
43 | ||
44 | #define IOPM_ALLOC_ORDER 2 | |
45 | #define MSRPM_ALLOC_ORDER 1 | |
46 | ||
6aa8b732 AK |
47 | #define SEG_TYPE_LDT 2 |
48 | #define SEG_TYPE_BUSY_TSS16 3 | |
49 | ||
6bc31bdc AP |
50 | #define SVM_FEATURE_NPT (1 << 0) |
51 | #define SVM_FEATURE_LBRV (1 << 1) | |
52 | #define SVM_FEATURE_SVML (1 << 2) | |
53 | #define SVM_FEATURE_NRIP (1 << 3) | |
54 | #define SVM_FEATURE_PAUSE_FILTER (1 << 10) | |
80b7706e | 55 | |
410e4d57 JR |
56 | #define NESTED_EXIT_HOST 0 /* Exit handled on host level */ |
57 | #define NESTED_EXIT_DONE 1 /* Exit caused nested vmexit */ | |
58 | #define NESTED_EXIT_CONTINUE 2 /* Further checks needed */ | |
59 | ||
24e09cbf JR |
60 | #define DEBUGCTL_RESERVED_BITS (~(0x3fULL)) |
61 | ||
67ec6607 JR |
62 | static bool erratum_383_found __read_mostly; |
63 | ||
6c8166a7 AK |
64 | static const u32 host_save_user_msrs[] = { |
65 | #ifdef CONFIG_X86_64 | |
66 | MSR_STAR, MSR_LSTAR, MSR_CSTAR, MSR_SYSCALL_MASK, MSR_KERNEL_GS_BASE, | |
67 | MSR_FS_BASE, | |
68 | #endif | |
69 | MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP, | |
70 | }; | |
71 | ||
72 | #define NR_HOST_SAVE_USER_MSRS ARRAY_SIZE(host_save_user_msrs) | |
73 | ||
74 | struct kvm_vcpu; | |
75 | ||
e6aa9abd JR |
76 | struct nested_state { |
77 | struct vmcb *hsave; | |
78 | u64 hsave_msr; | |
4a810181 | 79 | u64 vm_cr_msr; |
e6aa9abd JR |
80 | u64 vmcb; |
81 | ||
82 | /* These are the merged vectors */ | |
83 | u32 *msrpm; | |
84 | ||
85 | /* gpa pointers to the real vectors */ | |
86 | u64 vmcb_msrpm; | |
ce2ac085 | 87 | u64 vmcb_iopm; |
aad42c64 | 88 | |
cd3ff653 JR |
89 | /* A VMEXIT is required but not yet emulated */ |
90 | bool exit_required; | |
91 | ||
cda00082 JR |
92 | /* |
93 | * If we vmexit during an instruction emulation we need this to restore | |
94 | * the l1 guest rip after the emulation | |
95 | */ | |
96 | unsigned long vmexit_rip; | |
97 | unsigned long vmexit_rsp; | |
98 | unsigned long vmexit_rax; | |
99 | ||
aad42c64 | 100 | /* cache for intercepts of the guest */ |
4ee546b4 | 101 | u32 intercept_cr; |
3aed041a | 102 | u32 intercept_dr; |
aad42c64 JR |
103 | u32 intercept_exceptions; |
104 | u64 intercept; | |
105 | ||
5bd2edc3 JR |
106 | /* Nested Paging related state */ |
107 | u64 nested_cr3; | |
e6aa9abd JR |
108 | }; |
109 | ||
323c3d80 JR |
110 | #define MSRPM_OFFSETS 16 |
111 | static u32 msrpm_offsets[MSRPM_OFFSETS] __read_mostly; | |
112 | ||
6c8166a7 AK |
113 | struct vcpu_svm { |
114 | struct kvm_vcpu vcpu; | |
115 | struct vmcb *vmcb; | |
116 | unsigned long vmcb_pa; | |
117 | struct svm_cpu_data *svm_data; | |
118 | uint64_t asid_generation; | |
119 | uint64_t sysenter_esp; | |
120 | uint64_t sysenter_eip; | |
121 | ||
122 | u64 next_rip; | |
123 | ||
124 | u64 host_user_msrs[NR_HOST_SAVE_USER_MSRS]; | |
afe9e66f | 125 | struct { |
dacccfdd AK |
126 | u16 fs; |
127 | u16 gs; | |
128 | u16 ldt; | |
afe9e66f AK |
129 | u64 gs_base; |
130 | } host; | |
6c8166a7 AK |
131 | |
132 | u32 *msrpm; | |
6c8166a7 | 133 | |
e6aa9abd | 134 | struct nested_state nested; |
6be7d306 JK |
135 | |
136 | bool nmi_singlestep; | |
66b7138f JK |
137 | |
138 | unsigned int3_injected; | |
139 | unsigned long int3_rip; | |
631bc487 | 140 | u32 apf_reason; |
6c8166a7 AK |
141 | }; |
142 | ||
455716fa JR |
143 | #define MSR_INVALID 0xffffffffU |
144 | ||
ac72a9b7 JR |
145 | static struct svm_direct_access_msrs { |
146 | u32 index; /* Index of the MSR */ | |
147 | bool always; /* True if intercept is always on */ | |
148 | } direct_access_msrs[] = { | |
8c06585d | 149 | { .index = MSR_STAR, .always = true }, |
ac72a9b7 JR |
150 | { .index = MSR_IA32_SYSENTER_CS, .always = true }, |
151 | #ifdef CONFIG_X86_64 | |
152 | { .index = MSR_GS_BASE, .always = true }, | |
153 | { .index = MSR_FS_BASE, .always = true }, | |
154 | { .index = MSR_KERNEL_GS_BASE, .always = true }, | |
155 | { .index = MSR_LSTAR, .always = true }, | |
156 | { .index = MSR_CSTAR, .always = true }, | |
157 | { .index = MSR_SYSCALL_MASK, .always = true }, | |
158 | #endif | |
159 | { .index = MSR_IA32_LASTBRANCHFROMIP, .always = false }, | |
160 | { .index = MSR_IA32_LASTBRANCHTOIP, .always = false }, | |
161 | { .index = MSR_IA32_LASTINTFROMIP, .always = false }, | |
162 | { .index = MSR_IA32_LASTINTTOIP, .always = false }, | |
163 | { .index = MSR_INVALID, .always = false }, | |
6c8166a7 AK |
164 | }; |
165 | ||
709ddebf JR |
166 | /* enable NPT for AMD64 and X86 with PAE */ |
167 | #if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE) | |
168 | static bool npt_enabled = true; | |
169 | #else | |
e0231715 | 170 | static bool npt_enabled; |
709ddebf | 171 | #endif |
6c7dac72 JR |
172 | static int npt = 1; |
173 | ||
174 | module_param(npt, int, S_IRUGO); | |
e3da3acd | 175 | |
4b6e4dca | 176 | static int nested = 1; |
236de055 AG |
177 | module_param(nested, int, S_IRUGO); |
178 | ||
44874f84 | 179 | static void svm_flush_tlb(struct kvm_vcpu *vcpu); |
a5c3832d | 180 | static void svm_complete_interrupts(struct vcpu_svm *svm); |
04d2cc77 | 181 | |
410e4d57 | 182 | static int nested_svm_exit_handled(struct vcpu_svm *svm); |
b8e88bc8 | 183 | static int nested_svm_intercept(struct vcpu_svm *svm); |
cf74a78b | 184 | static int nested_svm_vmexit(struct vcpu_svm *svm); |
cf74a78b AG |
185 | static int nested_svm_check_exception(struct vcpu_svm *svm, unsigned nr, |
186 | bool has_error_code, u32 error_code); | |
187 | ||
8d28fec4 | 188 | enum { |
116a0a23 JR |
189 | VMCB_INTERCEPTS, /* Intercept vectors, TSC offset, |
190 | pause filter count */ | |
f56838e4 | 191 | VMCB_PERM_MAP, /* IOPM Base and MSRPM Base */ |
d48086d1 | 192 | VMCB_ASID, /* ASID */ |
decdbf6a | 193 | VMCB_INTR, /* int_ctl, int_vector */ |
b2747166 | 194 | VMCB_NPT, /* npt_en, nCR3, gPAT */ |
dcca1a65 | 195 | VMCB_CR, /* CR0, CR3, CR4, EFER */ |
8d28fec4 RJ |
196 | VMCB_DIRTY_MAX, |
197 | }; | |
198 | ||
decdbf6a JR |
199 | /* TPR is always written before VMRUN */ |
200 | #define VMCB_ALWAYS_DIRTY_MASK (1U << VMCB_INTR) | |
8d28fec4 RJ |
201 | |
202 | static inline void mark_all_dirty(struct vmcb *vmcb) | |
203 | { | |
204 | vmcb->control.clean = 0; | |
205 | } | |
206 | ||
207 | static inline void mark_all_clean(struct vmcb *vmcb) | |
208 | { | |
209 | vmcb->control.clean = ((1 << VMCB_DIRTY_MAX) - 1) | |
210 | & ~VMCB_ALWAYS_DIRTY_MASK; | |
211 | } | |
212 | ||
213 | static inline void mark_dirty(struct vmcb *vmcb, int bit) | |
214 | { | |
215 | vmcb->control.clean &= ~(1 << bit); | |
216 | } | |
217 | ||
a2fa3e9f GH |
218 | static inline struct vcpu_svm *to_svm(struct kvm_vcpu *vcpu) |
219 | { | |
fb3f0f51 | 220 | return container_of(vcpu, struct vcpu_svm, vcpu); |
a2fa3e9f GH |
221 | } |
222 | ||
384c6368 JR |
223 | static void recalc_intercepts(struct vcpu_svm *svm) |
224 | { | |
225 | struct vmcb_control_area *c, *h; | |
226 | struct nested_state *g; | |
227 | ||
116a0a23 JR |
228 | mark_dirty(svm->vmcb, VMCB_INTERCEPTS); |
229 | ||
384c6368 JR |
230 | if (!is_guest_mode(&svm->vcpu)) |
231 | return; | |
232 | ||
233 | c = &svm->vmcb->control; | |
234 | h = &svm->nested.hsave->control; | |
235 | g = &svm->nested; | |
236 | ||
4ee546b4 | 237 | c->intercept_cr = h->intercept_cr | g->intercept_cr; |
3aed041a | 238 | c->intercept_dr = h->intercept_dr | g->intercept_dr; |
384c6368 JR |
239 | c->intercept_exceptions = h->intercept_exceptions | g->intercept_exceptions; |
240 | c->intercept = h->intercept | g->intercept; | |
241 | } | |
242 | ||
4ee546b4 RJ |
243 | static inline struct vmcb *get_host_vmcb(struct vcpu_svm *svm) |
244 | { | |
245 | if (is_guest_mode(&svm->vcpu)) | |
246 | return svm->nested.hsave; | |
247 | else | |
248 | return svm->vmcb; | |
249 | } | |
250 | ||
251 | static inline void set_cr_intercept(struct vcpu_svm *svm, int bit) | |
252 | { | |
253 | struct vmcb *vmcb = get_host_vmcb(svm); | |
254 | ||
255 | vmcb->control.intercept_cr |= (1U << bit); | |
256 | ||
257 | recalc_intercepts(svm); | |
258 | } | |
259 | ||
260 | static inline void clr_cr_intercept(struct vcpu_svm *svm, int bit) | |
261 | { | |
262 | struct vmcb *vmcb = get_host_vmcb(svm); | |
263 | ||
264 | vmcb->control.intercept_cr &= ~(1U << bit); | |
265 | ||
266 | recalc_intercepts(svm); | |
267 | } | |
268 | ||
269 | static inline bool is_cr_intercept(struct vcpu_svm *svm, int bit) | |
270 | { | |
271 | struct vmcb *vmcb = get_host_vmcb(svm); | |
272 | ||
273 | return vmcb->control.intercept_cr & (1U << bit); | |
274 | } | |
275 | ||
3aed041a JR |
276 | static inline void set_dr_intercept(struct vcpu_svm *svm, int bit) |
277 | { | |
278 | struct vmcb *vmcb = get_host_vmcb(svm); | |
279 | ||
280 | vmcb->control.intercept_dr |= (1U << bit); | |
281 | ||
282 | recalc_intercepts(svm); | |
283 | } | |
284 | ||
285 | static inline void clr_dr_intercept(struct vcpu_svm *svm, int bit) | |
286 | { | |
287 | struct vmcb *vmcb = get_host_vmcb(svm); | |
288 | ||
289 | vmcb->control.intercept_dr &= ~(1U << bit); | |
290 | ||
291 | recalc_intercepts(svm); | |
292 | } | |
293 | ||
18c918c5 JR |
294 | static inline void set_exception_intercept(struct vcpu_svm *svm, int bit) |
295 | { | |
296 | struct vmcb *vmcb = get_host_vmcb(svm); | |
297 | ||
298 | vmcb->control.intercept_exceptions |= (1U << bit); | |
299 | ||
300 | recalc_intercepts(svm); | |
301 | } | |
302 | ||
303 | static inline void clr_exception_intercept(struct vcpu_svm *svm, int bit) | |
304 | { | |
305 | struct vmcb *vmcb = get_host_vmcb(svm); | |
306 | ||
307 | vmcb->control.intercept_exceptions &= ~(1U << bit); | |
308 | ||
309 | recalc_intercepts(svm); | |
310 | } | |
311 | ||
8a05a1b8 JR |
312 | static inline void set_intercept(struct vcpu_svm *svm, int bit) |
313 | { | |
314 | struct vmcb *vmcb = get_host_vmcb(svm); | |
315 | ||
316 | vmcb->control.intercept |= (1ULL << bit); | |
317 | ||
318 | recalc_intercepts(svm); | |
319 | } | |
320 | ||
321 | static inline void clr_intercept(struct vcpu_svm *svm, int bit) | |
322 | { | |
323 | struct vmcb *vmcb = get_host_vmcb(svm); | |
324 | ||
325 | vmcb->control.intercept &= ~(1ULL << bit); | |
326 | ||
327 | recalc_intercepts(svm); | |
328 | } | |
329 | ||
2af9194d JR |
330 | static inline void enable_gif(struct vcpu_svm *svm) |
331 | { | |
332 | svm->vcpu.arch.hflags |= HF_GIF_MASK; | |
333 | } | |
334 | ||
335 | static inline void disable_gif(struct vcpu_svm *svm) | |
336 | { | |
337 | svm->vcpu.arch.hflags &= ~HF_GIF_MASK; | |
338 | } | |
339 | ||
340 | static inline bool gif_set(struct vcpu_svm *svm) | |
341 | { | |
342 | return !!(svm->vcpu.arch.hflags & HF_GIF_MASK); | |
343 | } | |
344 | ||
4866d5e3 | 345 | static unsigned long iopm_base; |
6aa8b732 AK |
346 | |
347 | struct kvm_ldttss_desc { | |
348 | u16 limit0; | |
349 | u16 base0; | |
e0231715 JR |
350 | unsigned base1:8, type:5, dpl:2, p:1; |
351 | unsigned limit1:4, zero0:3, g:1, base2:8; | |
6aa8b732 AK |
352 | u32 base3; |
353 | u32 zero1; | |
354 | } __attribute__((packed)); | |
355 | ||
356 | struct svm_cpu_data { | |
357 | int cpu; | |
358 | ||
5008fdf5 AK |
359 | u64 asid_generation; |
360 | u32 max_asid; | |
361 | u32 next_asid; | |
6aa8b732 AK |
362 | struct kvm_ldttss_desc *tss_desc; |
363 | ||
364 | struct page *save_area; | |
365 | }; | |
366 | ||
367 | static DEFINE_PER_CPU(struct svm_cpu_data *, svm_data); | |
80b7706e | 368 | static uint32_t svm_features; |
6aa8b732 AK |
369 | |
370 | struct svm_init_data { | |
371 | int cpu; | |
372 | int r; | |
373 | }; | |
374 | ||
375 | static u32 msrpm_ranges[] = {0, 0xc0000000, 0xc0010000}; | |
376 | ||
9d8f549d | 377 | #define NUM_MSR_MAPS ARRAY_SIZE(msrpm_ranges) |
6aa8b732 AK |
378 | #define MSRS_RANGE_SIZE 2048 |
379 | #define MSRS_IN_RANGE (MSRS_RANGE_SIZE * 8 / 2) | |
380 | ||
455716fa JR |
381 | static u32 svm_msrpm_offset(u32 msr) |
382 | { | |
383 | u32 offset; | |
384 | int i; | |
385 | ||
386 | for (i = 0; i < NUM_MSR_MAPS; i++) { | |
387 | if (msr < msrpm_ranges[i] || | |
388 | msr >= msrpm_ranges[i] + MSRS_IN_RANGE) | |
389 | continue; | |
390 | ||
391 | offset = (msr - msrpm_ranges[i]) / 4; /* 4 msrs per u8 */ | |
392 | offset += (i * MSRS_RANGE_SIZE); /* add range offset */ | |
393 | ||
394 | /* Now we have the u8 offset - but need the u32 offset */ | |
395 | return offset / 4; | |
396 | } | |
397 | ||
398 | /* MSR not in any range */ | |
399 | return MSR_INVALID; | |
400 | } | |
401 | ||
6aa8b732 AK |
402 | #define MAX_INST_SIZE 15 |
403 | ||
6aa8b732 AK |
404 | static inline void clgi(void) |
405 | { | |
4ecac3fd | 406 | asm volatile (__ex(SVM_CLGI)); |
6aa8b732 AK |
407 | } |
408 | ||
409 | static inline void stgi(void) | |
410 | { | |
4ecac3fd | 411 | asm volatile (__ex(SVM_STGI)); |
6aa8b732 AK |
412 | } |
413 | ||
414 | static inline void invlpga(unsigned long addr, u32 asid) | |
415 | { | |
e0231715 | 416 | asm volatile (__ex(SVM_INVLPGA) : : "a"(addr), "c"(asid)); |
6aa8b732 AK |
417 | } |
418 | ||
6aa8b732 AK |
419 | static inline void force_new_asid(struct kvm_vcpu *vcpu) |
420 | { | |
a2fa3e9f | 421 | to_svm(vcpu)->asid_generation--; |
6aa8b732 AK |
422 | } |
423 | ||
424 | static inline void flush_guest_tlb(struct kvm_vcpu *vcpu) | |
425 | { | |
426 | force_new_asid(vcpu); | |
427 | } | |
428 | ||
4b16184c JR |
429 | static int get_npt_level(void) |
430 | { | |
431 | #ifdef CONFIG_X86_64 | |
432 | return PT64_ROOT_LEVEL; | |
433 | #else | |
434 | return PT32E_ROOT_LEVEL; | |
435 | #endif | |
436 | } | |
437 | ||
6aa8b732 AK |
438 | static void svm_set_efer(struct kvm_vcpu *vcpu, u64 efer) |
439 | { | |
6dc696d4 | 440 | vcpu->arch.efer = efer; |
709ddebf | 441 | if (!npt_enabled && !(efer & EFER_LMA)) |
2b5203ee | 442 | efer &= ~EFER_LME; |
6aa8b732 | 443 | |
9962d032 | 444 | to_svm(vcpu)->vmcb->save.efer = efer | EFER_SVME; |
dcca1a65 | 445 | mark_dirty(to_svm(vcpu)->vmcb, VMCB_CR); |
6aa8b732 AK |
446 | } |
447 | ||
6aa8b732 AK |
448 | static int is_external_interrupt(u32 info) |
449 | { | |
450 | info &= SVM_EVTINJ_TYPE_MASK | SVM_EVTINJ_VALID; | |
451 | return info == (SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_INTR); | |
452 | } | |
453 | ||
2809f5d2 GC |
454 | static u32 svm_get_interrupt_shadow(struct kvm_vcpu *vcpu, int mask) |
455 | { | |
456 | struct vcpu_svm *svm = to_svm(vcpu); | |
457 | u32 ret = 0; | |
458 | ||
459 | if (svm->vmcb->control.int_state & SVM_INTERRUPT_SHADOW_MASK) | |
48005f64 | 460 | ret |= KVM_X86_SHADOW_INT_STI | KVM_X86_SHADOW_INT_MOV_SS; |
2809f5d2 GC |
461 | return ret & mask; |
462 | } | |
463 | ||
464 | static void svm_set_interrupt_shadow(struct kvm_vcpu *vcpu, int mask) | |
465 | { | |
466 | struct vcpu_svm *svm = to_svm(vcpu); | |
467 | ||
468 | if (mask == 0) | |
469 | svm->vmcb->control.int_state &= ~SVM_INTERRUPT_SHADOW_MASK; | |
470 | else | |
471 | svm->vmcb->control.int_state |= SVM_INTERRUPT_SHADOW_MASK; | |
472 | ||
473 | } | |
474 | ||
6aa8b732 AK |
475 | static void skip_emulated_instruction(struct kvm_vcpu *vcpu) |
476 | { | |
a2fa3e9f GH |
477 | struct vcpu_svm *svm = to_svm(vcpu); |
478 | ||
6bc31bdc AP |
479 | if (svm->vmcb->control.next_rip != 0) |
480 | svm->next_rip = svm->vmcb->control.next_rip; | |
481 | ||
a2fa3e9f | 482 | if (!svm->next_rip) { |
851ba692 | 483 | if (emulate_instruction(vcpu, 0, 0, EMULTYPE_SKIP) != |
f629cf84 GN |
484 | EMULATE_DONE) |
485 | printk(KERN_DEBUG "%s: NOP\n", __func__); | |
6aa8b732 AK |
486 | return; |
487 | } | |
5fdbf976 MT |
488 | if (svm->next_rip - kvm_rip_read(vcpu) > MAX_INST_SIZE) |
489 | printk(KERN_ERR "%s: ip 0x%lx next 0x%llx\n", | |
490 | __func__, kvm_rip_read(vcpu), svm->next_rip); | |
6aa8b732 | 491 | |
5fdbf976 | 492 | kvm_rip_write(vcpu, svm->next_rip); |
2809f5d2 | 493 | svm_set_interrupt_shadow(vcpu, 0); |
6aa8b732 AK |
494 | } |
495 | ||
116a4752 | 496 | static void svm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr, |
ce7ddec4 JR |
497 | bool has_error_code, u32 error_code, |
498 | bool reinject) | |
116a4752 JK |
499 | { |
500 | struct vcpu_svm *svm = to_svm(vcpu); | |
501 | ||
e0231715 JR |
502 | /* |
503 | * If we are within a nested VM we'd better #VMEXIT and let the guest | |
504 | * handle the exception | |
505 | */ | |
ce7ddec4 JR |
506 | if (!reinject && |
507 | nested_svm_check_exception(svm, nr, has_error_code, error_code)) | |
116a4752 JK |
508 | return; |
509 | ||
2a6b20b8 | 510 | if (nr == BP_VECTOR && !static_cpu_has(X86_FEATURE_NRIPS)) { |
66b7138f JK |
511 | unsigned long rip, old_rip = kvm_rip_read(&svm->vcpu); |
512 | ||
513 | /* | |
514 | * For guest debugging where we have to reinject #BP if some | |
515 | * INT3 is guest-owned: | |
516 | * Emulate nRIP by moving RIP forward. Will fail if injection | |
517 | * raises a fault that is not intercepted. Still better than | |
518 | * failing in all cases. | |
519 | */ | |
520 | skip_emulated_instruction(&svm->vcpu); | |
521 | rip = kvm_rip_read(&svm->vcpu); | |
522 | svm->int3_rip = rip + svm->vmcb->save.cs.base; | |
523 | svm->int3_injected = rip - old_rip; | |
524 | } | |
525 | ||
116a4752 JK |
526 | svm->vmcb->control.event_inj = nr |
527 | | SVM_EVTINJ_VALID | |
528 | | (has_error_code ? SVM_EVTINJ_VALID_ERR : 0) | |
529 | | SVM_EVTINJ_TYPE_EXEPT; | |
530 | svm->vmcb->control.event_inj_err = error_code; | |
531 | } | |
532 | ||
67ec6607 JR |
533 | static void svm_init_erratum_383(void) |
534 | { | |
535 | u32 low, high; | |
536 | int err; | |
537 | u64 val; | |
538 | ||
1be85a6d | 539 | if (!cpu_has_amd_erratum(amd_erratum_383)) |
67ec6607 JR |
540 | return; |
541 | ||
542 | /* Use _safe variants to not break nested virtualization */ | |
543 | val = native_read_msr_safe(MSR_AMD64_DC_CFG, &err); | |
544 | if (err) | |
545 | return; | |
546 | ||
547 | val |= (1ULL << 47); | |
548 | ||
549 | low = lower_32_bits(val); | |
550 | high = upper_32_bits(val); | |
551 | ||
552 | native_write_msr_safe(MSR_AMD64_DC_CFG, low, high); | |
553 | ||
554 | erratum_383_found = true; | |
555 | } | |
556 | ||
6aa8b732 AK |
557 | static int has_svm(void) |
558 | { | |
63d1142f | 559 | const char *msg; |
6aa8b732 | 560 | |
63d1142f | 561 | if (!cpu_has_svm(&msg)) { |
ff81ff10 | 562 | printk(KERN_INFO "has_svm: %s\n", msg); |
6aa8b732 AK |
563 | return 0; |
564 | } | |
565 | ||
6aa8b732 AK |
566 | return 1; |
567 | } | |
568 | ||
569 | static void svm_hardware_disable(void *garbage) | |
570 | { | |
2c8dceeb | 571 | cpu_svm_disable(); |
6aa8b732 AK |
572 | } |
573 | ||
10474ae8 | 574 | static int svm_hardware_enable(void *garbage) |
6aa8b732 AK |
575 | { |
576 | ||
0fe1e009 | 577 | struct svm_cpu_data *sd; |
6aa8b732 | 578 | uint64_t efer; |
89a27f4d | 579 | struct desc_ptr gdt_descr; |
6aa8b732 AK |
580 | struct desc_struct *gdt; |
581 | int me = raw_smp_processor_id(); | |
582 | ||
10474ae8 AG |
583 | rdmsrl(MSR_EFER, efer); |
584 | if (efer & EFER_SVME) | |
585 | return -EBUSY; | |
586 | ||
6aa8b732 | 587 | if (!has_svm()) { |
e6732a5a ZA |
588 | printk(KERN_ERR "svm_hardware_enable: err EOPNOTSUPP on %d\n", |
589 | me); | |
10474ae8 | 590 | return -EINVAL; |
6aa8b732 | 591 | } |
0fe1e009 | 592 | sd = per_cpu(svm_data, me); |
6aa8b732 | 593 | |
0fe1e009 | 594 | if (!sd) { |
e6732a5a | 595 | printk(KERN_ERR "svm_hardware_enable: svm_data is NULL on %d\n", |
6aa8b732 | 596 | me); |
10474ae8 | 597 | return -EINVAL; |
6aa8b732 AK |
598 | } |
599 | ||
0fe1e009 TH |
600 | sd->asid_generation = 1; |
601 | sd->max_asid = cpuid_ebx(SVM_CPUID_FUNC) - 1; | |
602 | sd->next_asid = sd->max_asid + 1; | |
6aa8b732 | 603 | |
d6ab1ed4 | 604 | native_store_gdt(&gdt_descr); |
89a27f4d | 605 | gdt = (struct desc_struct *)gdt_descr.address; |
0fe1e009 | 606 | sd->tss_desc = (struct kvm_ldttss_desc *)(gdt + GDT_ENTRY_TSS); |
6aa8b732 | 607 | |
9962d032 | 608 | wrmsrl(MSR_EFER, efer | EFER_SVME); |
6aa8b732 | 609 | |
d0316554 | 610 | wrmsrl(MSR_VM_HSAVE_PA, page_to_pfn(sd->save_area) << PAGE_SHIFT); |
10474ae8 | 611 | |
67ec6607 JR |
612 | svm_init_erratum_383(); |
613 | ||
10474ae8 | 614 | return 0; |
6aa8b732 AK |
615 | } |
616 | ||
0da1db75 JR |
617 | static void svm_cpu_uninit(int cpu) |
618 | { | |
0fe1e009 | 619 | struct svm_cpu_data *sd = per_cpu(svm_data, raw_smp_processor_id()); |
0da1db75 | 620 | |
0fe1e009 | 621 | if (!sd) |
0da1db75 JR |
622 | return; |
623 | ||
624 | per_cpu(svm_data, raw_smp_processor_id()) = NULL; | |
0fe1e009 TH |
625 | __free_page(sd->save_area); |
626 | kfree(sd); | |
0da1db75 JR |
627 | } |
628 | ||
6aa8b732 AK |
629 | static int svm_cpu_init(int cpu) |
630 | { | |
0fe1e009 | 631 | struct svm_cpu_data *sd; |
6aa8b732 AK |
632 | int r; |
633 | ||
0fe1e009 TH |
634 | sd = kzalloc(sizeof(struct svm_cpu_data), GFP_KERNEL); |
635 | if (!sd) | |
6aa8b732 | 636 | return -ENOMEM; |
0fe1e009 TH |
637 | sd->cpu = cpu; |
638 | sd->save_area = alloc_page(GFP_KERNEL); | |
6aa8b732 | 639 | r = -ENOMEM; |
0fe1e009 | 640 | if (!sd->save_area) |
6aa8b732 AK |
641 | goto err_1; |
642 | ||
0fe1e009 | 643 | per_cpu(svm_data, cpu) = sd; |
6aa8b732 AK |
644 | |
645 | return 0; | |
646 | ||
647 | err_1: | |
0fe1e009 | 648 | kfree(sd); |
6aa8b732 AK |
649 | return r; |
650 | ||
651 | } | |
652 | ||
ac72a9b7 JR |
653 | static bool valid_msr_intercept(u32 index) |
654 | { | |
655 | int i; | |
656 | ||
657 | for (i = 0; direct_access_msrs[i].index != MSR_INVALID; i++) | |
658 | if (direct_access_msrs[i].index == index) | |
659 | return true; | |
660 | ||
661 | return false; | |
662 | } | |
663 | ||
bfc733a7 RR |
664 | static void set_msr_interception(u32 *msrpm, unsigned msr, |
665 | int read, int write) | |
6aa8b732 | 666 | { |
455716fa JR |
667 | u8 bit_read, bit_write; |
668 | unsigned long tmp; | |
669 | u32 offset; | |
6aa8b732 | 670 | |
ac72a9b7 JR |
671 | /* |
672 | * If this warning triggers extend the direct_access_msrs list at the | |
673 | * beginning of the file | |
674 | */ | |
675 | WARN_ON(!valid_msr_intercept(msr)); | |
676 | ||
455716fa JR |
677 | offset = svm_msrpm_offset(msr); |
678 | bit_read = 2 * (msr & 0x0f); | |
679 | bit_write = 2 * (msr & 0x0f) + 1; | |
680 | tmp = msrpm[offset]; | |
681 | ||
682 | BUG_ON(offset == MSR_INVALID); | |
683 | ||
684 | read ? clear_bit(bit_read, &tmp) : set_bit(bit_read, &tmp); | |
685 | write ? clear_bit(bit_write, &tmp) : set_bit(bit_write, &tmp); | |
686 | ||
687 | msrpm[offset] = tmp; | |
6aa8b732 AK |
688 | } |
689 | ||
f65c229c | 690 | static void svm_vcpu_init_msrpm(u32 *msrpm) |
6aa8b732 AK |
691 | { |
692 | int i; | |
693 | ||
f65c229c JR |
694 | memset(msrpm, 0xff, PAGE_SIZE * (1 << MSRPM_ALLOC_ORDER)); |
695 | ||
ac72a9b7 JR |
696 | for (i = 0; direct_access_msrs[i].index != MSR_INVALID; i++) { |
697 | if (!direct_access_msrs[i].always) | |
698 | continue; | |
699 | ||
700 | set_msr_interception(msrpm, direct_access_msrs[i].index, 1, 1); | |
701 | } | |
f65c229c JR |
702 | } |
703 | ||
323c3d80 JR |
704 | static void add_msr_offset(u32 offset) |
705 | { | |
706 | int i; | |
707 | ||
708 | for (i = 0; i < MSRPM_OFFSETS; ++i) { | |
709 | ||
710 | /* Offset already in list? */ | |
711 | if (msrpm_offsets[i] == offset) | |
bfc733a7 | 712 | return; |
323c3d80 JR |
713 | |
714 | /* Slot used by another offset? */ | |
715 | if (msrpm_offsets[i] != MSR_INVALID) | |
716 | continue; | |
717 | ||
718 | /* Add offset to list */ | |
719 | msrpm_offsets[i] = offset; | |
720 | ||
721 | return; | |
6aa8b732 | 722 | } |
323c3d80 JR |
723 | |
724 | /* | |
725 | * If this BUG triggers the msrpm_offsets table has an overflow. Just | |
726 | * increase MSRPM_OFFSETS in this case. | |
727 | */ | |
bfc733a7 | 728 | BUG(); |
6aa8b732 AK |
729 | } |
730 | ||
323c3d80 | 731 | static void init_msrpm_offsets(void) |
f65c229c | 732 | { |
323c3d80 | 733 | int i; |
f65c229c | 734 | |
323c3d80 JR |
735 | memset(msrpm_offsets, 0xff, sizeof(msrpm_offsets)); |
736 | ||
737 | for (i = 0; direct_access_msrs[i].index != MSR_INVALID; i++) { | |
738 | u32 offset; | |
739 | ||
740 | offset = svm_msrpm_offset(direct_access_msrs[i].index); | |
741 | BUG_ON(offset == MSR_INVALID); | |
742 | ||
743 | add_msr_offset(offset); | |
744 | } | |
f65c229c JR |
745 | } |
746 | ||
24e09cbf JR |
747 | static void svm_enable_lbrv(struct vcpu_svm *svm) |
748 | { | |
749 | u32 *msrpm = svm->msrpm; | |
750 | ||
751 | svm->vmcb->control.lbr_ctl = 1; | |
752 | set_msr_interception(msrpm, MSR_IA32_LASTBRANCHFROMIP, 1, 1); | |
753 | set_msr_interception(msrpm, MSR_IA32_LASTBRANCHTOIP, 1, 1); | |
754 | set_msr_interception(msrpm, MSR_IA32_LASTINTFROMIP, 1, 1); | |
755 | set_msr_interception(msrpm, MSR_IA32_LASTINTTOIP, 1, 1); | |
756 | } | |
757 | ||
758 | static void svm_disable_lbrv(struct vcpu_svm *svm) | |
759 | { | |
760 | u32 *msrpm = svm->msrpm; | |
761 | ||
762 | svm->vmcb->control.lbr_ctl = 0; | |
763 | set_msr_interception(msrpm, MSR_IA32_LASTBRANCHFROMIP, 0, 0); | |
764 | set_msr_interception(msrpm, MSR_IA32_LASTBRANCHTOIP, 0, 0); | |
765 | set_msr_interception(msrpm, MSR_IA32_LASTINTFROMIP, 0, 0); | |
766 | set_msr_interception(msrpm, MSR_IA32_LASTINTTOIP, 0, 0); | |
767 | } | |
768 | ||
6aa8b732 AK |
769 | static __init int svm_hardware_setup(void) |
770 | { | |
771 | int cpu; | |
772 | struct page *iopm_pages; | |
f65c229c | 773 | void *iopm_va; |
6aa8b732 AK |
774 | int r; |
775 | ||
6aa8b732 AK |
776 | iopm_pages = alloc_pages(GFP_KERNEL, IOPM_ALLOC_ORDER); |
777 | ||
778 | if (!iopm_pages) | |
779 | return -ENOMEM; | |
c8681339 AL |
780 | |
781 | iopm_va = page_address(iopm_pages); | |
782 | memset(iopm_va, 0xff, PAGE_SIZE * (1 << IOPM_ALLOC_ORDER)); | |
6aa8b732 AK |
783 | iopm_base = page_to_pfn(iopm_pages) << PAGE_SHIFT; |
784 | ||
323c3d80 JR |
785 | init_msrpm_offsets(); |
786 | ||
50a37eb4 JR |
787 | if (boot_cpu_has(X86_FEATURE_NX)) |
788 | kvm_enable_efer_bits(EFER_NX); | |
789 | ||
1b2fd70c AG |
790 | if (boot_cpu_has(X86_FEATURE_FXSR_OPT)) |
791 | kvm_enable_efer_bits(EFER_FFXSR); | |
792 | ||
236de055 AG |
793 | if (nested) { |
794 | printk(KERN_INFO "kvm: Nested Virtualization enabled\n"); | |
eec4b140 | 795 | kvm_enable_efer_bits(EFER_SVME | EFER_LMSLE); |
236de055 AG |
796 | } |
797 | ||
3230bb47 | 798 | for_each_possible_cpu(cpu) { |
6aa8b732 AK |
799 | r = svm_cpu_init(cpu); |
800 | if (r) | |
f65c229c | 801 | goto err; |
6aa8b732 | 802 | } |
33bd6a0b JR |
803 | |
804 | svm_features = cpuid_edx(SVM_CPUID_FUNC); | |
805 | ||
2a6b20b8 | 806 | if (!boot_cpu_has(X86_FEATURE_NPT)) |
e3da3acd JR |
807 | npt_enabled = false; |
808 | ||
6c7dac72 JR |
809 | if (npt_enabled && !npt) { |
810 | printk(KERN_INFO "kvm: Nested Paging disabled\n"); | |
811 | npt_enabled = false; | |
812 | } | |
813 | ||
18552672 | 814 | if (npt_enabled) { |
e3da3acd | 815 | printk(KERN_INFO "kvm: Nested Paging enabled\n"); |
18552672 | 816 | kvm_enable_tdp(); |
5f4cb662 JR |
817 | } else |
818 | kvm_disable_tdp(); | |
e3da3acd | 819 | |
6aa8b732 AK |
820 | return 0; |
821 | ||
f65c229c | 822 | err: |
6aa8b732 AK |
823 | __free_pages(iopm_pages, IOPM_ALLOC_ORDER); |
824 | iopm_base = 0; | |
825 | return r; | |
826 | } | |
827 | ||
828 | static __exit void svm_hardware_unsetup(void) | |
829 | { | |
0da1db75 JR |
830 | int cpu; |
831 | ||
3230bb47 | 832 | for_each_possible_cpu(cpu) |
0da1db75 JR |
833 | svm_cpu_uninit(cpu); |
834 | ||
6aa8b732 | 835 | __free_pages(pfn_to_page(iopm_base >> PAGE_SHIFT), IOPM_ALLOC_ORDER); |
f65c229c | 836 | iopm_base = 0; |
6aa8b732 AK |
837 | } |
838 | ||
839 | static void init_seg(struct vmcb_seg *seg) | |
840 | { | |
841 | seg->selector = 0; | |
842 | seg->attrib = SVM_SELECTOR_P_MASK | SVM_SELECTOR_S_MASK | | |
e0231715 | 843 | SVM_SELECTOR_WRITE_MASK; /* Read/Write Data Segment */ |
6aa8b732 AK |
844 | seg->limit = 0xffff; |
845 | seg->base = 0; | |
846 | } | |
847 | ||
848 | static void init_sys_seg(struct vmcb_seg *seg, uint32_t type) | |
849 | { | |
850 | seg->selector = 0; | |
851 | seg->attrib = SVM_SELECTOR_P_MASK | type; | |
852 | seg->limit = 0xffff; | |
853 | seg->base = 0; | |
854 | } | |
855 | ||
f4e1b3c8 ZA |
856 | static void svm_write_tsc_offset(struct kvm_vcpu *vcpu, u64 offset) |
857 | { | |
858 | struct vcpu_svm *svm = to_svm(vcpu); | |
859 | u64 g_tsc_offset = 0; | |
860 | ||
2030753d | 861 | if (is_guest_mode(vcpu)) { |
f4e1b3c8 ZA |
862 | g_tsc_offset = svm->vmcb->control.tsc_offset - |
863 | svm->nested.hsave->control.tsc_offset; | |
864 | svm->nested.hsave->control.tsc_offset = offset; | |
865 | } | |
866 | ||
867 | svm->vmcb->control.tsc_offset = offset + g_tsc_offset; | |
116a0a23 JR |
868 | |
869 | mark_dirty(svm->vmcb, VMCB_INTERCEPTS); | |
f4e1b3c8 ZA |
870 | } |
871 | ||
e48672fa ZA |
872 | static void svm_adjust_tsc_offset(struct kvm_vcpu *vcpu, s64 adjustment) |
873 | { | |
874 | struct vcpu_svm *svm = to_svm(vcpu); | |
875 | ||
876 | svm->vmcb->control.tsc_offset += adjustment; | |
2030753d | 877 | if (is_guest_mode(vcpu)) |
e48672fa | 878 | svm->nested.hsave->control.tsc_offset += adjustment; |
116a0a23 | 879 | mark_dirty(svm->vmcb, VMCB_INTERCEPTS); |
e48672fa ZA |
880 | } |
881 | ||
e6101a96 | 882 | static void init_vmcb(struct vcpu_svm *svm) |
6aa8b732 | 883 | { |
e6101a96 JR |
884 | struct vmcb_control_area *control = &svm->vmcb->control; |
885 | struct vmcb_save_area *save = &svm->vmcb->save; | |
6aa8b732 | 886 | |
bff78274 | 887 | svm->vcpu.fpu_active = 1; |
4ee546b4 | 888 | svm->vcpu.arch.hflags = 0; |
bff78274 | 889 | |
4ee546b4 RJ |
890 | set_cr_intercept(svm, INTERCEPT_CR0_READ); |
891 | set_cr_intercept(svm, INTERCEPT_CR3_READ); | |
892 | set_cr_intercept(svm, INTERCEPT_CR4_READ); | |
893 | set_cr_intercept(svm, INTERCEPT_CR0_WRITE); | |
894 | set_cr_intercept(svm, INTERCEPT_CR3_WRITE); | |
895 | set_cr_intercept(svm, INTERCEPT_CR4_WRITE); | |
896 | set_cr_intercept(svm, INTERCEPT_CR8_WRITE); | |
6aa8b732 | 897 | |
3aed041a JR |
898 | set_dr_intercept(svm, INTERCEPT_DR0_READ); |
899 | set_dr_intercept(svm, INTERCEPT_DR1_READ); | |
900 | set_dr_intercept(svm, INTERCEPT_DR2_READ); | |
901 | set_dr_intercept(svm, INTERCEPT_DR3_READ); | |
902 | set_dr_intercept(svm, INTERCEPT_DR4_READ); | |
903 | set_dr_intercept(svm, INTERCEPT_DR5_READ); | |
904 | set_dr_intercept(svm, INTERCEPT_DR6_READ); | |
905 | set_dr_intercept(svm, INTERCEPT_DR7_READ); | |
906 | ||
907 | set_dr_intercept(svm, INTERCEPT_DR0_WRITE); | |
908 | set_dr_intercept(svm, INTERCEPT_DR1_WRITE); | |
909 | set_dr_intercept(svm, INTERCEPT_DR2_WRITE); | |
910 | set_dr_intercept(svm, INTERCEPT_DR3_WRITE); | |
911 | set_dr_intercept(svm, INTERCEPT_DR4_WRITE); | |
912 | set_dr_intercept(svm, INTERCEPT_DR5_WRITE); | |
913 | set_dr_intercept(svm, INTERCEPT_DR6_WRITE); | |
914 | set_dr_intercept(svm, INTERCEPT_DR7_WRITE); | |
6aa8b732 | 915 | |
18c918c5 JR |
916 | set_exception_intercept(svm, PF_VECTOR); |
917 | set_exception_intercept(svm, UD_VECTOR); | |
918 | set_exception_intercept(svm, MC_VECTOR); | |
6aa8b732 | 919 | |
8a05a1b8 JR |
920 | set_intercept(svm, INTERCEPT_INTR); |
921 | set_intercept(svm, INTERCEPT_NMI); | |
922 | set_intercept(svm, INTERCEPT_SMI); | |
923 | set_intercept(svm, INTERCEPT_SELECTIVE_CR0); | |
924 | set_intercept(svm, INTERCEPT_CPUID); | |
925 | set_intercept(svm, INTERCEPT_INVD); | |
926 | set_intercept(svm, INTERCEPT_HLT); | |
927 | set_intercept(svm, INTERCEPT_INVLPG); | |
928 | set_intercept(svm, INTERCEPT_INVLPGA); | |
929 | set_intercept(svm, INTERCEPT_IOIO_PROT); | |
930 | set_intercept(svm, INTERCEPT_MSR_PROT); | |
931 | set_intercept(svm, INTERCEPT_TASK_SWITCH); | |
932 | set_intercept(svm, INTERCEPT_SHUTDOWN); | |
933 | set_intercept(svm, INTERCEPT_VMRUN); | |
934 | set_intercept(svm, INTERCEPT_VMMCALL); | |
935 | set_intercept(svm, INTERCEPT_VMLOAD); | |
936 | set_intercept(svm, INTERCEPT_VMSAVE); | |
937 | set_intercept(svm, INTERCEPT_STGI); | |
938 | set_intercept(svm, INTERCEPT_CLGI); | |
939 | set_intercept(svm, INTERCEPT_SKINIT); | |
940 | set_intercept(svm, INTERCEPT_WBINVD); | |
941 | set_intercept(svm, INTERCEPT_MONITOR); | |
942 | set_intercept(svm, INTERCEPT_MWAIT); | |
6aa8b732 AK |
943 | |
944 | control->iopm_base_pa = iopm_base; | |
f65c229c | 945 | control->msrpm_base_pa = __pa(svm->msrpm); |
6aa8b732 AK |
946 | control->int_ctl = V_INTR_MASKING_MASK; |
947 | ||
948 | init_seg(&save->es); | |
949 | init_seg(&save->ss); | |
950 | init_seg(&save->ds); | |
951 | init_seg(&save->fs); | |
952 | init_seg(&save->gs); | |
953 | ||
954 | save->cs.selector = 0xf000; | |
955 | /* Executable/Readable Code Segment */ | |
956 | save->cs.attrib = SVM_SELECTOR_READ_MASK | SVM_SELECTOR_P_MASK | | |
957 | SVM_SELECTOR_S_MASK | SVM_SELECTOR_CODE_MASK; | |
958 | save->cs.limit = 0xffff; | |
d92899a0 AK |
959 | /* |
960 | * cs.base should really be 0xffff0000, but vmx can't handle that, so | |
961 | * be consistent with it. | |
962 | * | |
963 | * Replace when we have real mode working for vmx. | |
964 | */ | |
965 | save->cs.base = 0xf0000; | |
6aa8b732 AK |
966 | |
967 | save->gdtr.limit = 0xffff; | |
968 | save->idtr.limit = 0xffff; | |
969 | ||
970 | init_sys_seg(&save->ldtr, SEG_TYPE_LDT); | |
971 | init_sys_seg(&save->tr, SEG_TYPE_BUSY_TSS16); | |
972 | ||
eaa48512 | 973 | svm_set_efer(&svm->vcpu, 0); |
d77c26fc | 974 | save->dr6 = 0xffff0ff0; |
6aa8b732 AK |
975 | save->dr7 = 0x400; |
976 | save->rflags = 2; | |
977 | save->rip = 0x0000fff0; | |
5fdbf976 | 978 | svm->vcpu.arch.regs[VCPU_REGS_RIP] = save->rip; |
6aa8b732 | 979 | |
e0231715 JR |
980 | /* |
981 | * This is the guest-visible cr0 value. | |
18fa000a | 982 | * svm_set_cr0() sets PG and WP and clears NW and CD on save->cr0. |
6aa8b732 | 983 | */ |
678041ad MT |
984 | svm->vcpu.arch.cr0 = 0; |
985 | (void)kvm_set_cr0(&svm->vcpu, X86_CR0_NW | X86_CR0_CD | X86_CR0_ET); | |
18fa000a | 986 | |
66aee91a | 987 | save->cr4 = X86_CR4_PAE; |
6aa8b732 | 988 | /* rdx = ?? */ |
709ddebf JR |
989 | |
990 | if (npt_enabled) { | |
991 | /* Setup VMCB for Nested Paging */ | |
992 | control->nested_ctl = 1; | |
8a05a1b8 JR |
993 | clr_intercept(svm, INTERCEPT_TASK_SWITCH); |
994 | clr_intercept(svm, INTERCEPT_INVLPG); | |
18c918c5 | 995 | clr_exception_intercept(svm, PF_VECTOR); |
4ee546b4 RJ |
996 | clr_cr_intercept(svm, INTERCEPT_CR3_READ); |
997 | clr_cr_intercept(svm, INTERCEPT_CR3_WRITE); | |
709ddebf | 998 | save->g_pat = 0x0007040600070406ULL; |
709ddebf JR |
999 | save->cr3 = 0; |
1000 | save->cr4 = 0; | |
1001 | } | |
a79d2f18 | 1002 | force_new_asid(&svm->vcpu); |
1371d904 | 1003 | |
e6aa9abd | 1004 | svm->nested.vmcb = 0; |
2af9194d JR |
1005 | svm->vcpu.arch.hflags = 0; |
1006 | ||
2a6b20b8 | 1007 | if (boot_cpu_has(X86_FEATURE_PAUSEFILTER)) { |
565d0998 | 1008 | control->pause_filter_count = 3000; |
8a05a1b8 | 1009 | set_intercept(svm, INTERCEPT_PAUSE); |
565d0998 ML |
1010 | } |
1011 | ||
8d28fec4 RJ |
1012 | mark_all_dirty(svm->vmcb); |
1013 | ||
2af9194d | 1014 | enable_gif(svm); |
6aa8b732 AK |
1015 | } |
1016 | ||
e00c8cf2 | 1017 | static int svm_vcpu_reset(struct kvm_vcpu *vcpu) |
04d2cc77 AK |
1018 | { |
1019 | struct vcpu_svm *svm = to_svm(vcpu); | |
1020 | ||
e6101a96 | 1021 | init_vmcb(svm); |
70433389 | 1022 | |
c5af89b6 | 1023 | if (!kvm_vcpu_is_bsp(vcpu)) { |
5fdbf976 | 1024 | kvm_rip_write(vcpu, 0); |
ad312c7c ZX |
1025 | svm->vmcb->save.cs.base = svm->vcpu.arch.sipi_vector << 12; |
1026 | svm->vmcb->save.cs.selector = svm->vcpu.arch.sipi_vector << 8; | |
70433389 | 1027 | } |
5fdbf976 MT |
1028 | vcpu->arch.regs_avail = ~0; |
1029 | vcpu->arch.regs_dirty = ~0; | |
e00c8cf2 AK |
1030 | |
1031 | return 0; | |
04d2cc77 AK |
1032 | } |
1033 | ||
fb3f0f51 | 1034 | static struct kvm_vcpu *svm_create_vcpu(struct kvm *kvm, unsigned int id) |
6aa8b732 | 1035 | { |
a2fa3e9f | 1036 | struct vcpu_svm *svm; |
6aa8b732 | 1037 | struct page *page; |
f65c229c | 1038 | struct page *msrpm_pages; |
b286d5d8 | 1039 | struct page *hsave_page; |
3d6368ef | 1040 | struct page *nested_msrpm_pages; |
fb3f0f51 | 1041 | int err; |
6aa8b732 | 1042 | |
c16f862d | 1043 | svm = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); |
fb3f0f51 RR |
1044 | if (!svm) { |
1045 | err = -ENOMEM; | |
1046 | goto out; | |
1047 | } | |
1048 | ||
1049 | err = kvm_vcpu_init(&svm->vcpu, kvm, id); | |
1050 | if (err) | |
1051 | goto free_svm; | |
1052 | ||
b7af4043 | 1053 | err = -ENOMEM; |
6aa8b732 | 1054 | page = alloc_page(GFP_KERNEL); |
b7af4043 | 1055 | if (!page) |
fb3f0f51 | 1056 | goto uninit; |
6aa8b732 | 1057 | |
f65c229c JR |
1058 | msrpm_pages = alloc_pages(GFP_KERNEL, MSRPM_ALLOC_ORDER); |
1059 | if (!msrpm_pages) | |
b7af4043 | 1060 | goto free_page1; |
3d6368ef AG |
1061 | |
1062 | nested_msrpm_pages = alloc_pages(GFP_KERNEL, MSRPM_ALLOC_ORDER); | |
1063 | if (!nested_msrpm_pages) | |
b7af4043 | 1064 | goto free_page2; |
f65c229c | 1065 | |
b286d5d8 AG |
1066 | hsave_page = alloc_page(GFP_KERNEL); |
1067 | if (!hsave_page) | |
b7af4043 TY |
1068 | goto free_page3; |
1069 | ||
e6aa9abd | 1070 | svm->nested.hsave = page_address(hsave_page); |
b286d5d8 | 1071 | |
b7af4043 TY |
1072 | svm->msrpm = page_address(msrpm_pages); |
1073 | svm_vcpu_init_msrpm(svm->msrpm); | |
1074 | ||
e6aa9abd | 1075 | svm->nested.msrpm = page_address(nested_msrpm_pages); |
323c3d80 | 1076 | svm_vcpu_init_msrpm(svm->nested.msrpm); |
3d6368ef | 1077 | |
a2fa3e9f GH |
1078 | svm->vmcb = page_address(page); |
1079 | clear_page(svm->vmcb); | |
1080 | svm->vmcb_pa = page_to_pfn(page) << PAGE_SHIFT; | |
1081 | svm->asid_generation = 0; | |
e6101a96 | 1082 | init_vmcb(svm); |
99e3e30a | 1083 | kvm_write_tsc(&svm->vcpu, 0); |
a2fa3e9f | 1084 | |
10ab25cd JK |
1085 | err = fx_init(&svm->vcpu); |
1086 | if (err) | |
1087 | goto free_page4; | |
1088 | ||
ad312c7c | 1089 | svm->vcpu.arch.apic_base = 0xfee00000 | MSR_IA32_APICBASE_ENABLE; |
c5af89b6 | 1090 | if (kvm_vcpu_is_bsp(&svm->vcpu)) |
ad312c7c | 1091 | svm->vcpu.arch.apic_base |= MSR_IA32_APICBASE_BSP; |
6aa8b732 | 1092 | |
fb3f0f51 | 1093 | return &svm->vcpu; |
36241b8c | 1094 | |
10ab25cd JK |
1095 | free_page4: |
1096 | __free_page(hsave_page); | |
b7af4043 TY |
1097 | free_page3: |
1098 | __free_pages(nested_msrpm_pages, MSRPM_ALLOC_ORDER); | |
1099 | free_page2: | |
1100 | __free_pages(msrpm_pages, MSRPM_ALLOC_ORDER); | |
1101 | free_page1: | |
1102 | __free_page(page); | |
fb3f0f51 RR |
1103 | uninit: |
1104 | kvm_vcpu_uninit(&svm->vcpu); | |
1105 | free_svm: | |
a4770347 | 1106 | kmem_cache_free(kvm_vcpu_cache, svm); |
fb3f0f51 RR |
1107 | out: |
1108 | return ERR_PTR(err); | |
6aa8b732 AK |
1109 | } |
1110 | ||
1111 | static void svm_free_vcpu(struct kvm_vcpu *vcpu) | |
1112 | { | |
a2fa3e9f GH |
1113 | struct vcpu_svm *svm = to_svm(vcpu); |
1114 | ||
fb3f0f51 | 1115 | __free_page(pfn_to_page(svm->vmcb_pa >> PAGE_SHIFT)); |
f65c229c | 1116 | __free_pages(virt_to_page(svm->msrpm), MSRPM_ALLOC_ORDER); |
e6aa9abd JR |
1117 | __free_page(virt_to_page(svm->nested.hsave)); |
1118 | __free_pages(virt_to_page(svm->nested.msrpm), MSRPM_ALLOC_ORDER); | |
fb3f0f51 | 1119 | kvm_vcpu_uninit(vcpu); |
a4770347 | 1120 | kmem_cache_free(kvm_vcpu_cache, svm); |
6aa8b732 AK |
1121 | } |
1122 | ||
15ad7146 | 1123 | static void svm_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
6aa8b732 | 1124 | { |
a2fa3e9f | 1125 | struct vcpu_svm *svm = to_svm(vcpu); |
15ad7146 | 1126 | int i; |
0cc5064d | 1127 | |
0cc5064d | 1128 | if (unlikely(cpu != vcpu->cpu)) { |
4b656b12 | 1129 | svm->asid_generation = 0; |
8d28fec4 | 1130 | mark_all_dirty(svm->vmcb); |
0cc5064d | 1131 | } |
94dfbdb3 | 1132 | |
82ca2d10 AK |
1133 | #ifdef CONFIG_X86_64 |
1134 | rdmsrl(MSR_GS_BASE, to_svm(vcpu)->host.gs_base); | |
1135 | #endif | |
dacccfdd AK |
1136 | savesegment(fs, svm->host.fs); |
1137 | savesegment(gs, svm->host.gs); | |
1138 | svm->host.ldt = kvm_read_ldt(); | |
1139 | ||
94dfbdb3 | 1140 | for (i = 0; i < NR_HOST_SAVE_USER_MSRS; i++) |
a2fa3e9f | 1141 | rdmsrl(host_save_user_msrs[i], svm->host_user_msrs[i]); |
6aa8b732 AK |
1142 | } |
1143 | ||
1144 | static void svm_vcpu_put(struct kvm_vcpu *vcpu) | |
1145 | { | |
a2fa3e9f | 1146 | struct vcpu_svm *svm = to_svm(vcpu); |
94dfbdb3 AL |
1147 | int i; |
1148 | ||
e1beb1d3 | 1149 | ++vcpu->stat.host_state_reload; |
dacccfdd AK |
1150 | kvm_load_ldt(svm->host.ldt); |
1151 | #ifdef CONFIG_X86_64 | |
1152 | loadsegment(fs, svm->host.fs); | |
1153 | load_gs_index(svm->host.gs); | |
1154 | wrmsrl(MSR_KERNEL_GS_BASE, current->thread.gs); | |
1155 | #else | |
1156 | loadsegment(gs, svm->host.gs); | |
1157 | #endif | |
94dfbdb3 | 1158 | for (i = 0; i < NR_HOST_SAVE_USER_MSRS; i++) |
a2fa3e9f | 1159 | wrmsrl(host_save_user_msrs[i], svm->host_user_msrs[i]); |
6aa8b732 AK |
1160 | } |
1161 | ||
6aa8b732 AK |
1162 | static unsigned long svm_get_rflags(struct kvm_vcpu *vcpu) |
1163 | { | |
a2fa3e9f | 1164 | return to_svm(vcpu)->vmcb->save.rflags; |
6aa8b732 AK |
1165 | } |
1166 | ||
1167 | static void svm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags) | |
1168 | { | |
a2fa3e9f | 1169 | to_svm(vcpu)->vmcb->save.rflags = rflags; |
6aa8b732 AK |
1170 | } |
1171 | ||
6de4f3ad AK |
1172 | static void svm_cache_reg(struct kvm_vcpu *vcpu, enum kvm_reg reg) |
1173 | { | |
1174 | switch (reg) { | |
1175 | case VCPU_EXREG_PDPTR: | |
1176 | BUG_ON(!npt_enabled); | |
ff03a073 | 1177 | load_pdptrs(vcpu, vcpu->arch.walk_mmu, vcpu->arch.cr3); |
6de4f3ad AK |
1178 | break; |
1179 | default: | |
1180 | BUG(); | |
1181 | } | |
1182 | } | |
1183 | ||
f0b85051 AG |
1184 | static void svm_set_vintr(struct vcpu_svm *svm) |
1185 | { | |
8a05a1b8 | 1186 | set_intercept(svm, INTERCEPT_VINTR); |
f0b85051 AG |
1187 | } |
1188 | ||
1189 | static void svm_clear_vintr(struct vcpu_svm *svm) | |
1190 | { | |
8a05a1b8 | 1191 | clr_intercept(svm, INTERCEPT_VINTR); |
f0b85051 AG |
1192 | } |
1193 | ||
6aa8b732 AK |
1194 | static struct vmcb_seg *svm_seg(struct kvm_vcpu *vcpu, int seg) |
1195 | { | |
a2fa3e9f | 1196 | struct vmcb_save_area *save = &to_svm(vcpu)->vmcb->save; |
6aa8b732 AK |
1197 | |
1198 | switch (seg) { | |
1199 | case VCPU_SREG_CS: return &save->cs; | |
1200 | case VCPU_SREG_DS: return &save->ds; | |
1201 | case VCPU_SREG_ES: return &save->es; | |
1202 | case VCPU_SREG_FS: return &save->fs; | |
1203 | case VCPU_SREG_GS: return &save->gs; | |
1204 | case VCPU_SREG_SS: return &save->ss; | |
1205 | case VCPU_SREG_TR: return &save->tr; | |
1206 | case VCPU_SREG_LDTR: return &save->ldtr; | |
1207 | } | |
1208 | BUG(); | |
8b6d44c7 | 1209 | return NULL; |
6aa8b732 AK |
1210 | } |
1211 | ||
1212 | static u64 svm_get_segment_base(struct kvm_vcpu *vcpu, int seg) | |
1213 | { | |
1214 | struct vmcb_seg *s = svm_seg(vcpu, seg); | |
1215 | ||
1216 | return s->base; | |
1217 | } | |
1218 | ||
1219 | static void svm_get_segment(struct kvm_vcpu *vcpu, | |
1220 | struct kvm_segment *var, int seg) | |
1221 | { | |
1222 | struct vmcb_seg *s = svm_seg(vcpu, seg); | |
1223 | ||
1224 | var->base = s->base; | |
1225 | var->limit = s->limit; | |
1226 | var->selector = s->selector; | |
1227 | var->type = s->attrib & SVM_SELECTOR_TYPE_MASK; | |
1228 | var->s = (s->attrib >> SVM_SELECTOR_S_SHIFT) & 1; | |
1229 | var->dpl = (s->attrib >> SVM_SELECTOR_DPL_SHIFT) & 3; | |
1230 | var->present = (s->attrib >> SVM_SELECTOR_P_SHIFT) & 1; | |
1231 | var->avl = (s->attrib >> SVM_SELECTOR_AVL_SHIFT) & 1; | |
1232 | var->l = (s->attrib >> SVM_SELECTOR_L_SHIFT) & 1; | |
1233 | var->db = (s->attrib >> SVM_SELECTOR_DB_SHIFT) & 1; | |
1234 | var->g = (s->attrib >> SVM_SELECTOR_G_SHIFT) & 1; | |
25022acc | 1235 | |
e0231715 JR |
1236 | /* |
1237 | * AMD's VMCB does not have an explicit unusable field, so emulate it | |
19bca6ab AP |
1238 | * for cross vendor migration purposes by "not present" |
1239 | */ | |
1240 | var->unusable = !var->present || (var->type == 0); | |
1241 | ||
1fbdc7a5 AP |
1242 | switch (seg) { |
1243 | case VCPU_SREG_CS: | |
1244 | /* | |
1245 | * SVM always stores 0 for the 'G' bit in the CS selector in | |
1246 | * the VMCB on a VMEXIT. This hurts cross-vendor migration: | |
1247 | * Intel's VMENTRY has a check on the 'G' bit. | |
1248 | */ | |
25022acc | 1249 | var->g = s->limit > 0xfffff; |
1fbdc7a5 AP |
1250 | break; |
1251 | case VCPU_SREG_TR: | |
1252 | /* | |
1253 | * Work around a bug where the busy flag in the tr selector | |
1254 | * isn't exposed | |
1255 | */ | |
c0d09828 | 1256 | var->type |= 0x2; |
1fbdc7a5 AP |
1257 | break; |
1258 | case VCPU_SREG_DS: | |
1259 | case VCPU_SREG_ES: | |
1260 | case VCPU_SREG_FS: | |
1261 | case VCPU_SREG_GS: | |
1262 | /* | |
1263 | * The accessed bit must always be set in the segment | |
1264 | * descriptor cache, although it can be cleared in the | |
1265 | * descriptor, the cached bit always remains at 1. Since | |
1266 | * Intel has a check on this, set it here to support | |
1267 | * cross-vendor migration. | |
1268 | */ | |
1269 | if (!var->unusable) | |
1270 | var->type |= 0x1; | |
1271 | break; | |
b586eb02 | 1272 | case VCPU_SREG_SS: |
e0231715 JR |
1273 | /* |
1274 | * On AMD CPUs sometimes the DB bit in the segment | |
b586eb02 AP |
1275 | * descriptor is left as 1, although the whole segment has |
1276 | * been made unusable. Clear it here to pass an Intel VMX | |
1277 | * entry check when cross vendor migrating. | |
1278 | */ | |
1279 | if (var->unusable) | |
1280 | var->db = 0; | |
1281 | break; | |
1fbdc7a5 | 1282 | } |
6aa8b732 AK |
1283 | } |
1284 | ||
2e4d2653 IE |
1285 | static int svm_get_cpl(struct kvm_vcpu *vcpu) |
1286 | { | |
1287 | struct vmcb_save_area *save = &to_svm(vcpu)->vmcb->save; | |
1288 | ||
1289 | return save->cpl; | |
1290 | } | |
1291 | ||
89a27f4d | 1292 | static void svm_get_idt(struct kvm_vcpu *vcpu, struct desc_ptr *dt) |
6aa8b732 | 1293 | { |
a2fa3e9f GH |
1294 | struct vcpu_svm *svm = to_svm(vcpu); |
1295 | ||
89a27f4d GN |
1296 | dt->size = svm->vmcb->save.idtr.limit; |
1297 | dt->address = svm->vmcb->save.idtr.base; | |
6aa8b732 AK |
1298 | } |
1299 | ||
89a27f4d | 1300 | static void svm_set_idt(struct kvm_vcpu *vcpu, struct desc_ptr *dt) |
6aa8b732 | 1301 | { |
a2fa3e9f GH |
1302 | struct vcpu_svm *svm = to_svm(vcpu); |
1303 | ||
89a27f4d GN |
1304 | svm->vmcb->save.idtr.limit = dt->size; |
1305 | svm->vmcb->save.idtr.base = dt->address ; | |
6aa8b732 AK |
1306 | } |
1307 | ||
89a27f4d | 1308 | static void svm_get_gdt(struct kvm_vcpu *vcpu, struct desc_ptr *dt) |
6aa8b732 | 1309 | { |
a2fa3e9f GH |
1310 | struct vcpu_svm *svm = to_svm(vcpu); |
1311 | ||
89a27f4d GN |
1312 | dt->size = svm->vmcb->save.gdtr.limit; |
1313 | dt->address = svm->vmcb->save.gdtr.base; | |
6aa8b732 AK |
1314 | } |
1315 | ||
89a27f4d | 1316 | static void svm_set_gdt(struct kvm_vcpu *vcpu, struct desc_ptr *dt) |
6aa8b732 | 1317 | { |
a2fa3e9f GH |
1318 | struct vcpu_svm *svm = to_svm(vcpu); |
1319 | ||
89a27f4d GN |
1320 | svm->vmcb->save.gdtr.limit = dt->size; |
1321 | svm->vmcb->save.gdtr.base = dt->address ; | |
6aa8b732 AK |
1322 | } |
1323 | ||
e8467fda AK |
1324 | static void svm_decache_cr0_guest_bits(struct kvm_vcpu *vcpu) |
1325 | { | |
1326 | } | |
1327 | ||
25c4c276 | 1328 | static void svm_decache_cr4_guest_bits(struct kvm_vcpu *vcpu) |
399badf3 AK |
1329 | { |
1330 | } | |
1331 | ||
d225157b AK |
1332 | static void update_cr0_intercept(struct vcpu_svm *svm) |
1333 | { | |
1334 | ulong gcr0 = svm->vcpu.arch.cr0; | |
1335 | u64 *hcr0 = &svm->vmcb->save.cr0; | |
1336 | ||
1337 | if (!svm->vcpu.fpu_active) | |
1338 | *hcr0 |= SVM_CR0_SELECTIVE_MASK; | |
1339 | else | |
1340 | *hcr0 = (*hcr0 & ~SVM_CR0_SELECTIVE_MASK) | |
1341 | | (gcr0 & SVM_CR0_SELECTIVE_MASK); | |
1342 | ||
dcca1a65 | 1343 | mark_dirty(svm->vmcb, VMCB_CR); |
d225157b AK |
1344 | |
1345 | if (gcr0 == *hcr0 && svm->vcpu.fpu_active) { | |
4ee546b4 RJ |
1346 | clr_cr_intercept(svm, INTERCEPT_CR0_READ); |
1347 | clr_cr_intercept(svm, INTERCEPT_CR0_WRITE); | |
d225157b | 1348 | } else { |
4ee546b4 RJ |
1349 | set_cr_intercept(svm, INTERCEPT_CR0_READ); |
1350 | set_cr_intercept(svm, INTERCEPT_CR0_WRITE); | |
d225157b AK |
1351 | } |
1352 | } | |
1353 | ||
6aa8b732 AK |
1354 | static void svm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) |
1355 | { | |
a2fa3e9f GH |
1356 | struct vcpu_svm *svm = to_svm(vcpu); |
1357 | ||
2030753d | 1358 | if (is_guest_mode(vcpu)) { |
7f5d8b56 JR |
1359 | /* |
1360 | * We are here because we run in nested mode, the host kvm | |
1361 | * intercepts cr0 writes but the l1 hypervisor does not. | |
1362 | * But the L1 hypervisor may intercept selective cr0 writes. | |
1363 | * This needs to be checked here. | |
1364 | */ | |
1365 | unsigned long old, new; | |
1366 | ||
1367 | /* Remove bits that would trigger a real cr0 write intercept */ | |
1368 | old = vcpu->arch.cr0 & SVM_CR0_SELECTIVE_MASK; | |
1369 | new = cr0 & SVM_CR0_SELECTIVE_MASK; | |
1370 | ||
1371 | if (old == new) { | |
1372 | /* cr0 write with ts and mp unchanged */ | |
1373 | svm->vmcb->control.exit_code = SVM_EXIT_CR0_SEL_WRITE; | |
cda00082 JR |
1374 | if (nested_svm_exit_handled(svm) == NESTED_EXIT_DONE) { |
1375 | svm->nested.vmexit_rip = kvm_rip_read(vcpu); | |
1376 | svm->nested.vmexit_rsp = kvm_register_read(vcpu, VCPU_REGS_RSP); | |
1377 | svm->nested.vmexit_rax = kvm_register_read(vcpu, VCPU_REGS_RAX); | |
7f5d8b56 | 1378 | return; |
cda00082 | 1379 | } |
7f5d8b56 JR |
1380 | } |
1381 | } | |
1382 | ||
05b3e0c2 | 1383 | #ifdef CONFIG_X86_64 |
f6801dff | 1384 | if (vcpu->arch.efer & EFER_LME) { |
707d92fa | 1385 | if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) { |
f6801dff | 1386 | vcpu->arch.efer |= EFER_LMA; |
2b5203ee | 1387 | svm->vmcb->save.efer |= EFER_LMA | EFER_LME; |
6aa8b732 AK |
1388 | } |
1389 | ||
d77c26fc | 1390 | if (is_paging(vcpu) && !(cr0 & X86_CR0_PG)) { |
f6801dff | 1391 | vcpu->arch.efer &= ~EFER_LMA; |
2b5203ee | 1392 | svm->vmcb->save.efer &= ~(EFER_LMA | EFER_LME); |
6aa8b732 AK |
1393 | } |
1394 | } | |
1395 | #endif | |
ad312c7c | 1396 | vcpu->arch.cr0 = cr0; |
888f9f3e AK |
1397 | |
1398 | if (!npt_enabled) | |
1399 | cr0 |= X86_CR0_PG | X86_CR0_WP; | |
02daab21 AK |
1400 | |
1401 | if (!vcpu->fpu_active) | |
334df50a | 1402 | cr0 |= X86_CR0_TS; |
709ddebf JR |
1403 | /* |
1404 | * re-enable caching here because the QEMU bios | |
1405 | * does not do it - this results in some delay at | |
1406 | * reboot | |
1407 | */ | |
1408 | cr0 &= ~(X86_CR0_CD | X86_CR0_NW); | |
a2fa3e9f | 1409 | svm->vmcb->save.cr0 = cr0; |
dcca1a65 | 1410 | mark_dirty(svm->vmcb, VMCB_CR); |
d225157b | 1411 | update_cr0_intercept(svm); |
6aa8b732 AK |
1412 | } |
1413 | ||
1414 | static void svm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4) | |
1415 | { | |
6394b649 | 1416 | unsigned long host_cr4_mce = read_cr4() & X86_CR4_MCE; |
e5eab0ce JR |
1417 | unsigned long old_cr4 = to_svm(vcpu)->vmcb->save.cr4; |
1418 | ||
1419 | if (npt_enabled && ((old_cr4 ^ cr4) & X86_CR4_PGE)) | |
1420 | force_new_asid(vcpu); | |
6394b649 | 1421 | |
ec077263 JR |
1422 | vcpu->arch.cr4 = cr4; |
1423 | if (!npt_enabled) | |
1424 | cr4 |= X86_CR4_PAE; | |
6394b649 | 1425 | cr4 |= host_cr4_mce; |
ec077263 | 1426 | to_svm(vcpu)->vmcb->save.cr4 = cr4; |
dcca1a65 | 1427 | mark_dirty(to_svm(vcpu)->vmcb, VMCB_CR); |
6aa8b732 AK |
1428 | } |
1429 | ||
1430 | static void svm_set_segment(struct kvm_vcpu *vcpu, | |
1431 | struct kvm_segment *var, int seg) | |
1432 | { | |
a2fa3e9f | 1433 | struct vcpu_svm *svm = to_svm(vcpu); |
6aa8b732 AK |
1434 | struct vmcb_seg *s = svm_seg(vcpu, seg); |
1435 | ||
1436 | s->base = var->base; | |
1437 | s->limit = var->limit; | |
1438 | s->selector = var->selector; | |
1439 | if (var->unusable) | |
1440 | s->attrib = 0; | |
1441 | else { | |
1442 | s->attrib = (var->type & SVM_SELECTOR_TYPE_MASK); | |
1443 | s->attrib |= (var->s & 1) << SVM_SELECTOR_S_SHIFT; | |
1444 | s->attrib |= (var->dpl & 3) << SVM_SELECTOR_DPL_SHIFT; | |
1445 | s->attrib |= (var->present & 1) << SVM_SELECTOR_P_SHIFT; | |
1446 | s->attrib |= (var->avl & 1) << SVM_SELECTOR_AVL_SHIFT; | |
1447 | s->attrib |= (var->l & 1) << SVM_SELECTOR_L_SHIFT; | |
1448 | s->attrib |= (var->db & 1) << SVM_SELECTOR_DB_SHIFT; | |
1449 | s->attrib |= (var->g & 1) << SVM_SELECTOR_G_SHIFT; | |
1450 | } | |
1451 | if (seg == VCPU_SREG_CS) | |
a2fa3e9f GH |
1452 | svm->vmcb->save.cpl |
1453 | = (svm->vmcb->save.cs.attrib | |
6aa8b732 AK |
1454 | >> SVM_SELECTOR_DPL_SHIFT) & 3; |
1455 | ||
1456 | } | |
1457 | ||
44c11430 | 1458 | static void update_db_intercept(struct kvm_vcpu *vcpu) |
6aa8b732 | 1459 | { |
d0bfb940 JK |
1460 | struct vcpu_svm *svm = to_svm(vcpu); |
1461 | ||
18c918c5 JR |
1462 | clr_exception_intercept(svm, DB_VECTOR); |
1463 | clr_exception_intercept(svm, BP_VECTOR); | |
44c11430 | 1464 | |
6be7d306 | 1465 | if (svm->nmi_singlestep) |
18c918c5 | 1466 | set_exception_intercept(svm, DB_VECTOR); |
44c11430 | 1467 | |
d0bfb940 JK |
1468 | if (vcpu->guest_debug & KVM_GUESTDBG_ENABLE) { |
1469 | if (vcpu->guest_debug & | |
1470 | (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP)) | |
18c918c5 | 1471 | set_exception_intercept(svm, DB_VECTOR); |
d0bfb940 | 1472 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP) |
18c918c5 | 1473 | set_exception_intercept(svm, BP_VECTOR); |
d0bfb940 JK |
1474 | } else |
1475 | vcpu->guest_debug = 0; | |
44c11430 GN |
1476 | } |
1477 | ||
355be0b9 | 1478 | static void svm_guest_debug(struct kvm_vcpu *vcpu, struct kvm_guest_debug *dbg) |
44c11430 | 1479 | { |
44c11430 GN |
1480 | struct vcpu_svm *svm = to_svm(vcpu); |
1481 | ||
ae675ef0 JK |
1482 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) |
1483 | svm->vmcb->save.dr7 = dbg->arch.debugreg[7]; | |
1484 | else | |
1485 | svm->vmcb->save.dr7 = vcpu->arch.dr7; | |
1486 | ||
355be0b9 | 1487 | update_db_intercept(vcpu); |
6aa8b732 AK |
1488 | } |
1489 | ||
0fe1e009 | 1490 | static void new_asid(struct vcpu_svm *svm, struct svm_cpu_data *sd) |
6aa8b732 | 1491 | { |
0fe1e009 TH |
1492 | if (sd->next_asid > sd->max_asid) { |
1493 | ++sd->asid_generation; | |
1494 | sd->next_asid = 1; | |
a2fa3e9f | 1495 | svm->vmcb->control.tlb_ctl = TLB_CONTROL_FLUSH_ALL_ASID; |
6aa8b732 AK |
1496 | } |
1497 | ||
0fe1e009 TH |
1498 | svm->asid_generation = sd->asid_generation; |
1499 | svm->vmcb->control.asid = sd->next_asid++; | |
d48086d1 JR |
1500 | |
1501 | mark_dirty(svm->vmcb, VMCB_ASID); | |
6aa8b732 AK |
1502 | } |
1503 | ||
020df079 | 1504 | static void svm_set_dr7(struct kvm_vcpu *vcpu, unsigned long value) |
6aa8b732 | 1505 | { |
42dbaa5a | 1506 | struct vcpu_svm *svm = to_svm(vcpu); |
42dbaa5a | 1507 | |
020df079 | 1508 | svm->vmcb->save.dr7 = value; |
6aa8b732 AK |
1509 | } |
1510 | ||
851ba692 | 1511 | static int pf_interception(struct vcpu_svm *svm) |
6aa8b732 | 1512 | { |
631bc487 | 1513 | u64 fault_address = svm->vmcb->control.exit_info_2; |
6aa8b732 | 1514 | u32 error_code; |
631bc487 | 1515 | int r = 1; |
6aa8b732 | 1516 | |
631bc487 GN |
1517 | switch (svm->apf_reason) { |
1518 | default: | |
1519 | error_code = svm->vmcb->control.exit_info_1; | |
af9ca2d7 | 1520 | |
631bc487 GN |
1521 | trace_kvm_page_fault(fault_address, error_code); |
1522 | if (!npt_enabled && kvm_event_needs_reinjection(&svm->vcpu)) | |
1523 | kvm_mmu_unprotect_page_virt(&svm->vcpu, fault_address); | |
1524 | r = kvm_mmu_page_fault(&svm->vcpu, fault_address, error_code); | |
1525 | break; | |
1526 | case KVM_PV_REASON_PAGE_NOT_PRESENT: | |
1527 | svm->apf_reason = 0; | |
1528 | local_irq_disable(); | |
1529 | kvm_async_pf_task_wait(fault_address); | |
1530 | local_irq_enable(); | |
1531 | break; | |
1532 | case KVM_PV_REASON_PAGE_READY: | |
1533 | svm->apf_reason = 0; | |
1534 | local_irq_disable(); | |
1535 | kvm_async_pf_task_wake(fault_address); | |
1536 | local_irq_enable(); | |
1537 | break; | |
1538 | } | |
1539 | return r; | |
6aa8b732 AK |
1540 | } |
1541 | ||
851ba692 | 1542 | static int db_interception(struct vcpu_svm *svm) |
d0bfb940 | 1543 | { |
851ba692 AK |
1544 | struct kvm_run *kvm_run = svm->vcpu.run; |
1545 | ||
d0bfb940 | 1546 | if (!(svm->vcpu.guest_debug & |
44c11430 | 1547 | (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP)) && |
6be7d306 | 1548 | !svm->nmi_singlestep) { |
d0bfb940 JK |
1549 | kvm_queue_exception(&svm->vcpu, DB_VECTOR); |
1550 | return 1; | |
1551 | } | |
44c11430 | 1552 | |
6be7d306 JK |
1553 | if (svm->nmi_singlestep) { |
1554 | svm->nmi_singlestep = false; | |
44c11430 GN |
1555 | if (!(svm->vcpu.guest_debug & KVM_GUESTDBG_SINGLESTEP)) |
1556 | svm->vmcb->save.rflags &= | |
1557 | ~(X86_EFLAGS_TF | X86_EFLAGS_RF); | |
1558 | update_db_intercept(&svm->vcpu); | |
1559 | } | |
1560 | ||
1561 | if (svm->vcpu.guest_debug & | |
e0231715 | 1562 | (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP)) { |
44c11430 GN |
1563 | kvm_run->exit_reason = KVM_EXIT_DEBUG; |
1564 | kvm_run->debug.arch.pc = | |
1565 | svm->vmcb->save.cs.base + svm->vmcb->save.rip; | |
1566 | kvm_run->debug.arch.exception = DB_VECTOR; | |
1567 | return 0; | |
1568 | } | |
1569 | ||
1570 | return 1; | |
d0bfb940 JK |
1571 | } |
1572 | ||
851ba692 | 1573 | static int bp_interception(struct vcpu_svm *svm) |
d0bfb940 | 1574 | { |
851ba692 AK |
1575 | struct kvm_run *kvm_run = svm->vcpu.run; |
1576 | ||
d0bfb940 JK |
1577 | kvm_run->exit_reason = KVM_EXIT_DEBUG; |
1578 | kvm_run->debug.arch.pc = svm->vmcb->save.cs.base + svm->vmcb->save.rip; | |
1579 | kvm_run->debug.arch.exception = BP_VECTOR; | |
1580 | return 0; | |
1581 | } | |
1582 | ||
851ba692 | 1583 | static int ud_interception(struct vcpu_svm *svm) |
7aa81cc0 AL |
1584 | { |
1585 | int er; | |
1586 | ||
851ba692 | 1587 | er = emulate_instruction(&svm->vcpu, 0, 0, EMULTYPE_TRAP_UD); |
7aa81cc0 | 1588 | if (er != EMULATE_DONE) |
7ee5d940 | 1589 | kvm_queue_exception(&svm->vcpu, UD_VECTOR); |
7aa81cc0 AL |
1590 | return 1; |
1591 | } | |
1592 | ||
6b52d186 | 1593 | static void svm_fpu_activate(struct kvm_vcpu *vcpu) |
7807fa6c | 1594 | { |
6b52d186 | 1595 | struct vcpu_svm *svm = to_svm(vcpu); |
66a562f7 | 1596 | |
18c918c5 | 1597 | clr_exception_intercept(svm, NM_VECTOR); |
66a562f7 | 1598 | |
e756fc62 | 1599 | svm->vcpu.fpu_active = 1; |
d225157b | 1600 | update_cr0_intercept(svm); |
6b52d186 | 1601 | } |
a2fa3e9f | 1602 | |
6b52d186 AK |
1603 | static int nm_interception(struct vcpu_svm *svm) |
1604 | { | |
1605 | svm_fpu_activate(&svm->vcpu); | |
a2fa3e9f | 1606 | return 1; |
7807fa6c AL |
1607 | } |
1608 | ||
67ec6607 JR |
1609 | static bool is_erratum_383(void) |
1610 | { | |
1611 | int err, i; | |
1612 | u64 value; | |
1613 | ||
1614 | if (!erratum_383_found) | |
1615 | return false; | |
1616 | ||
1617 | value = native_read_msr_safe(MSR_IA32_MC0_STATUS, &err); | |
1618 | if (err) | |
1619 | return false; | |
1620 | ||
1621 | /* Bit 62 may or may not be set for this mce */ | |
1622 | value &= ~(1ULL << 62); | |
1623 | ||
1624 | if (value != 0xb600000000010015ULL) | |
1625 | return false; | |
1626 | ||
1627 | /* Clear MCi_STATUS registers */ | |
1628 | for (i = 0; i < 6; ++i) | |
1629 | native_write_msr_safe(MSR_IA32_MCx_STATUS(i), 0, 0); | |
1630 | ||
1631 | value = native_read_msr_safe(MSR_IA32_MCG_STATUS, &err); | |
1632 | if (!err) { | |
1633 | u32 low, high; | |
1634 | ||
1635 | value &= ~(1ULL << 2); | |
1636 | low = lower_32_bits(value); | |
1637 | high = upper_32_bits(value); | |
1638 | ||
1639 | native_write_msr_safe(MSR_IA32_MCG_STATUS, low, high); | |
1640 | } | |
1641 | ||
1642 | /* Flush tlb to evict multi-match entries */ | |
1643 | __flush_tlb_all(); | |
1644 | ||
1645 | return true; | |
1646 | } | |
1647 | ||
fe5913e4 | 1648 | static void svm_handle_mce(struct vcpu_svm *svm) |
53371b50 | 1649 | { |
67ec6607 JR |
1650 | if (is_erratum_383()) { |
1651 | /* | |
1652 | * Erratum 383 triggered. Guest state is corrupt so kill the | |
1653 | * guest. | |
1654 | */ | |
1655 | pr_err("KVM: Guest triggered AMD Erratum 383\n"); | |
1656 | ||
a8eeb04a | 1657 | kvm_make_request(KVM_REQ_TRIPLE_FAULT, &svm->vcpu); |
67ec6607 JR |
1658 | |
1659 | return; | |
1660 | } | |
1661 | ||
53371b50 JR |
1662 | /* |
1663 | * On an #MC intercept the MCE handler is not called automatically in | |
1664 | * the host. So do it by hand here. | |
1665 | */ | |
1666 | asm volatile ( | |
1667 | "int $0x12\n"); | |
1668 | /* not sure if we ever come back to this point */ | |
1669 | ||
fe5913e4 JR |
1670 | return; |
1671 | } | |
1672 | ||
1673 | static int mc_interception(struct vcpu_svm *svm) | |
1674 | { | |
53371b50 JR |
1675 | return 1; |
1676 | } | |
1677 | ||
851ba692 | 1678 | static int shutdown_interception(struct vcpu_svm *svm) |
46fe4ddd | 1679 | { |
851ba692 AK |
1680 | struct kvm_run *kvm_run = svm->vcpu.run; |
1681 | ||
46fe4ddd JR |
1682 | /* |
1683 | * VMCB is undefined after a SHUTDOWN intercept | |
1684 | * so reinitialize it. | |
1685 | */ | |
a2fa3e9f | 1686 | clear_page(svm->vmcb); |
e6101a96 | 1687 | init_vmcb(svm); |
46fe4ddd JR |
1688 | |
1689 | kvm_run->exit_reason = KVM_EXIT_SHUTDOWN; | |
1690 | return 0; | |
1691 | } | |
1692 | ||
851ba692 | 1693 | static int io_interception(struct vcpu_svm *svm) |
6aa8b732 | 1694 | { |
cf8f70bf | 1695 | struct kvm_vcpu *vcpu = &svm->vcpu; |
d77c26fc | 1696 | u32 io_info = svm->vmcb->control.exit_info_1; /* address size bug? */ |
34c33d16 | 1697 | int size, in, string; |
039576c0 | 1698 | unsigned port; |
6aa8b732 | 1699 | |
e756fc62 | 1700 | ++svm->vcpu.stat.io_exits; |
e70669ab | 1701 | string = (io_info & SVM_IOIO_STR_MASK) != 0; |
039576c0 | 1702 | in = (io_info & SVM_IOIO_TYPE_MASK) != 0; |
cf8f70bf | 1703 | if (string || in) |
6d77dbfc | 1704 | return emulate_instruction(vcpu, 0, 0, 0) == EMULATE_DONE; |
cf8f70bf | 1705 | |
039576c0 AK |
1706 | port = io_info >> 16; |
1707 | size = (io_info & SVM_IOIO_SIZE_MASK) >> SVM_IOIO_SIZE_SHIFT; | |
cf8f70bf | 1708 | svm->next_rip = svm->vmcb->control.exit_info_2; |
e93f36bc | 1709 | skip_emulated_instruction(&svm->vcpu); |
cf8f70bf GN |
1710 | |
1711 | return kvm_fast_pio_out(vcpu, size, port); | |
6aa8b732 AK |
1712 | } |
1713 | ||
851ba692 | 1714 | static int nmi_interception(struct vcpu_svm *svm) |
c47f098d JR |
1715 | { |
1716 | return 1; | |
1717 | } | |
1718 | ||
851ba692 | 1719 | static int intr_interception(struct vcpu_svm *svm) |
a0698055 JR |
1720 | { |
1721 | ++svm->vcpu.stat.irq_exits; | |
1722 | return 1; | |
1723 | } | |
1724 | ||
851ba692 | 1725 | static int nop_on_interception(struct vcpu_svm *svm) |
6aa8b732 AK |
1726 | { |
1727 | return 1; | |
1728 | } | |
1729 | ||
851ba692 | 1730 | static int halt_interception(struct vcpu_svm *svm) |
6aa8b732 | 1731 | { |
5fdbf976 | 1732 | svm->next_rip = kvm_rip_read(&svm->vcpu) + 1; |
e756fc62 RR |
1733 | skip_emulated_instruction(&svm->vcpu); |
1734 | return kvm_emulate_halt(&svm->vcpu); | |
6aa8b732 AK |
1735 | } |
1736 | ||
851ba692 | 1737 | static int vmmcall_interception(struct vcpu_svm *svm) |
02e235bc | 1738 | { |
5fdbf976 | 1739 | svm->next_rip = kvm_rip_read(&svm->vcpu) + 3; |
e756fc62 | 1740 | skip_emulated_instruction(&svm->vcpu); |
7aa81cc0 AL |
1741 | kvm_emulate_hypercall(&svm->vcpu); |
1742 | return 1; | |
02e235bc AK |
1743 | } |
1744 | ||
5bd2edc3 JR |
1745 | static unsigned long nested_svm_get_tdp_cr3(struct kvm_vcpu *vcpu) |
1746 | { | |
1747 | struct vcpu_svm *svm = to_svm(vcpu); | |
1748 | ||
1749 | return svm->nested.nested_cr3; | |
1750 | } | |
1751 | ||
1752 | static void nested_svm_set_tdp_cr3(struct kvm_vcpu *vcpu, | |
1753 | unsigned long root) | |
1754 | { | |
1755 | struct vcpu_svm *svm = to_svm(vcpu); | |
1756 | ||
1757 | svm->vmcb->control.nested_cr3 = root; | |
b2747166 | 1758 | mark_dirty(svm->vmcb, VMCB_NPT); |
5bd2edc3 JR |
1759 | force_new_asid(vcpu); |
1760 | } | |
1761 | ||
6389ee94 AK |
1762 | static void nested_svm_inject_npf_exit(struct kvm_vcpu *vcpu, |
1763 | struct x86_exception *fault) | |
5bd2edc3 JR |
1764 | { |
1765 | struct vcpu_svm *svm = to_svm(vcpu); | |
1766 | ||
1767 | svm->vmcb->control.exit_code = SVM_EXIT_NPF; | |
1768 | svm->vmcb->control.exit_code_hi = 0; | |
6389ee94 AK |
1769 | svm->vmcb->control.exit_info_1 = fault->error_code; |
1770 | svm->vmcb->control.exit_info_2 = fault->address; | |
5bd2edc3 JR |
1771 | |
1772 | nested_svm_vmexit(svm); | |
1773 | } | |
1774 | ||
4b16184c JR |
1775 | static int nested_svm_init_mmu_context(struct kvm_vcpu *vcpu) |
1776 | { | |
1777 | int r; | |
1778 | ||
1779 | r = kvm_init_shadow_mmu(vcpu, &vcpu->arch.mmu); | |
1780 | ||
1781 | vcpu->arch.mmu.set_cr3 = nested_svm_set_tdp_cr3; | |
1782 | vcpu->arch.mmu.get_cr3 = nested_svm_get_tdp_cr3; | |
1783 | vcpu->arch.mmu.inject_page_fault = nested_svm_inject_npf_exit; | |
1784 | vcpu->arch.mmu.shadow_root_level = get_npt_level(); | |
1785 | vcpu->arch.walk_mmu = &vcpu->arch.nested_mmu; | |
1786 | ||
1787 | return r; | |
1788 | } | |
1789 | ||
1790 | static void nested_svm_uninit_mmu_context(struct kvm_vcpu *vcpu) | |
1791 | { | |
1792 | vcpu->arch.walk_mmu = &vcpu->arch.mmu; | |
1793 | } | |
1794 | ||
c0725420 AG |
1795 | static int nested_svm_check_permissions(struct vcpu_svm *svm) |
1796 | { | |
f6801dff | 1797 | if (!(svm->vcpu.arch.efer & EFER_SVME) |
c0725420 AG |
1798 | || !is_paging(&svm->vcpu)) { |
1799 | kvm_queue_exception(&svm->vcpu, UD_VECTOR); | |
1800 | return 1; | |
1801 | } | |
1802 | ||
1803 | if (svm->vmcb->save.cpl) { | |
1804 | kvm_inject_gp(&svm->vcpu, 0); | |
1805 | return 1; | |
1806 | } | |
1807 | ||
1808 | return 0; | |
1809 | } | |
1810 | ||
cf74a78b AG |
1811 | static int nested_svm_check_exception(struct vcpu_svm *svm, unsigned nr, |
1812 | bool has_error_code, u32 error_code) | |
1813 | { | |
b8e88bc8 JR |
1814 | int vmexit; |
1815 | ||
2030753d | 1816 | if (!is_guest_mode(&svm->vcpu)) |
0295ad7d | 1817 | return 0; |
cf74a78b | 1818 | |
0295ad7d JR |
1819 | svm->vmcb->control.exit_code = SVM_EXIT_EXCP_BASE + nr; |
1820 | svm->vmcb->control.exit_code_hi = 0; | |
1821 | svm->vmcb->control.exit_info_1 = error_code; | |
1822 | svm->vmcb->control.exit_info_2 = svm->vcpu.arch.cr2; | |
1823 | ||
b8e88bc8 JR |
1824 | vmexit = nested_svm_intercept(svm); |
1825 | if (vmexit == NESTED_EXIT_DONE) | |
1826 | svm->nested.exit_required = true; | |
1827 | ||
1828 | return vmexit; | |
cf74a78b AG |
1829 | } |
1830 | ||
8fe54654 JR |
1831 | /* This function returns true if it is save to enable the irq window */ |
1832 | static inline bool nested_svm_intr(struct vcpu_svm *svm) | |
cf74a78b | 1833 | { |
2030753d | 1834 | if (!is_guest_mode(&svm->vcpu)) |
8fe54654 | 1835 | return true; |
cf74a78b | 1836 | |
26666957 | 1837 | if (!(svm->vcpu.arch.hflags & HF_VINTR_MASK)) |
8fe54654 | 1838 | return true; |
cf74a78b | 1839 | |
26666957 | 1840 | if (!(svm->vcpu.arch.hflags & HF_HIF_MASK)) |
8fe54654 | 1841 | return false; |
cf74a78b | 1842 | |
a0a07cd2 GN |
1843 | /* |
1844 | * if vmexit was already requested (by intercepted exception | |
1845 | * for instance) do not overwrite it with "external interrupt" | |
1846 | * vmexit. | |
1847 | */ | |
1848 | if (svm->nested.exit_required) | |
1849 | return false; | |
1850 | ||
197717d5 JR |
1851 | svm->vmcb->control.exit_code = SVM_EXIT_INTR; |
1852 | svm->vmcb->control.exit_info_1 = 0; | |
1853 | svm->vmcb->control.exit_info_2 = 0; | |
26666957 | 1854 | |
cd3ff653 JR |
1855 | if (svm->nested.intercept & 1ULL) { |
1856 | /* | |
1857 | * The #vmexit can't be emulated here directly because this | |
1858 | * code path runs with irqs and preemtion disabled. A | |
1859 | * #vmexit emulation might sleep. Only signal request for | |
1860 | * the #vmexit here. | |
1861 | */ | |
1862 | svm->nested.exit_required = true; | |
236649de | 1863 | trace_kvm_nested_intr_vmexit(svm->vmcb->save.rip); |
8fe54654 | 1864 | return false; |
cf74a78b AG |
1865 | } |
1866 | ||
8fe54654 | 1867 | return true; |
cf74a78b AG |
1868 | } |
1869 | ||
887f500c JR |
1870 | /* This function returns true if it is save to enable the nmi window */ |
1871 | static inline bool nested_svm_nmi(struct vcpu_svm *svm) | |
1872 | { | |
2030753d | 1873 | if (!is_guest_mode(&svm->vcpu)) |
887f500c JR |
1874 | return true; |
1875 | ||
1876 | if (!(svm->nested.intercept & (1ULL << INTERCEPT_NMI))) | |
1877 | return true; | |
1878 | ||
1879 | svm->vmcb->control.exit_code = SVM_EXIT_NMI; | |
1880 | svm->nested.exit_required = true; | |
1881 | ||
1882 | return false; | |
cf74a78b AG |
1883 | } |
1884 | ||
7597f129 | 1885 | static void *nested_svm_map(struct vcpu_svm *svm, u64 gpa, struct page **_page) |
34f80cfa JR |
1886 | { |
1887 | struct page *page; | |
1888 | ||
6c3bd3d7 JR |
1889 | might_sleep(); |
1890 | ||
34f80cfa | 1891 | page = gfn_to_page(svm->vcpu.kvm, gpa >> PAGE_SHIFT); |
34f80cfa JR |
1892 | if (is_error_page(page)) |
1893 | goto error; | |
1894 | ||
7597f129 JR |
1895 | *_page = page; |
1896 | ||
1897 | return kmap(page); | |
34f80cfa JR |
1898 | |
1899 | error: | |
1900 | kvm_release_page_clean(page); | |
1901 | kvm_inject_gp(&svm->vcpu, 0); | |
1902 | ||
1903 | return NULL; | |
1904 | } | |
1905 | ||
7597f129 | 1906 | static void nested_svm_unmap(struct page *page) |
34f80cfa | 1907 | { |
7597f129 | 1908 | kunmap(page); |
34f80cfa JR |
1909 | kvm_release_page_dirty(page); |
1910 | } | |
34f80cfa | 1911 | |
ce2ac085 JR |
1912 | static int nested_svm_intercept_ioio(struct vcpu_svm *svm) |
1913 | { | |
1914 | unsigned port; | |
1915 | u8 val, bit; | |
1916 | u64 gpa; | |
34f80cfa | 1917 | |
ce2ac085 JR |
1918 | if (!(svm->nested.intercept & (1ULL << INTERCEPT_IOIO_PROT))) |
1919 | return NESTED_EXIT_HOST; | |
34f80cfa | 1920 | |
ce2ac085 JR |
1921 | port = svm->vmcb->control.exit_info_1 >> 16; |
1922 | gpa = svm->nested.vmcb_iopm + (port / 8); | |
1923 | bit = port % 8; | |
1924 | val = 0; | |
1925 | ||
1926 | if (kvm_read_guest(svm->vcpu.kvm, gpa, &val, 1)) | |
1927 | val &= (1 << bit); | |
1928 | ||
1929 | return val ? NESTED_EXIT_DONE : NESTED_EXIT_HOST; | |
34f80cfa JR |
1930 | } |
1931 | ||
d2477826 | 1932 | static int nested_svm_exit_handled_msr(struct vcpu_svm *svm) |
4c2161ae | 1933 | { |
0d6b3537 JR |
1934 | u32 offset, msr, value; |
1935 | int write, mask; | |
4c2161ae | 1936 | |
3d62d9aa | 1937 | if (!(svm->nested.intercept & (1ULL << INTERCEPT_MSR_PROT))) |
d2477826 | 1938 | return NESTED_EXIT_HOST; |
3d62d9aa | 1939 | |
0d6b3537 JR |
1940 | msr = svm->vcpu.arch.regs[VCPU_REGS_RCX]; |
1941 | offset = svm_msrpm_offset(msr); | |
1942 | write = svm->vmcb->control.exit_info_1 & 1; | |
1943 | mask = 1 << ((2 * (msr & 0xf)) + write); | |
3d62d9aa | 1944 | |
0d6b3537 JR |
1945 | if (offset == MSR_INVALID) |
1946 | return NESTED_EXIT_DONE; | |
4c2161ae | 1947 | |
0d6b3537 JR |
1948 | /* Offset is in 32 bit units but need in 8 bit units */ |
1949 | offset *= 4; | |
4c2161ae | 1950 | |
0d6b3537 JR |
1951 | if (kvm_read_guest(svm->vcpu.kvm, svm->nested.vmcb_msrpm + offset, &value, 4)) |
1952 | return NESTED_EXIT_DONE; | |
3d62d9aa | 1953 | |
0d6b3537 | 1954 | return (value & mask) ? NESTED_EXIT_DONE : NESTED_EXIT_HOST; |
4c2161ae JR |
1955 | } |
1956 | ||
410e4d57 | 1957 | static int nested_svm_exit_special(struct vcpu_svm *svm) |
cf74a78b | 1958 | { |
cf74a78b | 1959 | u32 exit_code = svm->vmcb->control.exit_code; |
4c2161ae | 1960 | |
410e4d57 JR |
1961 | switch (exit_code) { |
1962 | case SVM_EXIT_INTR: | |
1963 | case SVM_EXIT_NMI: | |
ff47a49b | 1964 | case SVM_EXIT_EXCP_BASE + MC_VECTOR: |
410e4d57 | 1965 | return NESTED_EXIT_HOST; |
410e4d57 | 1966 | case SVM_EXIT_NPF: |
e0231715 | 1967 | /* For now we are always handling NPFs when using them */ |
410e4d57 JR |
1968 | if (npt_enabled) |
1969 | return NESTED_EXIT_HOST; | |
1970 | break; | |
410e4d57 | 1971 | case SVM_EXIT_EXCP_BASE + PF_VECTOR: |
631bc487 GN |
1972 | /* When we're shadowing, trap PFs, but not async PF */ |
1973 | if (!npt_enabled && svm->apf_reason == 0) | |
410e4d57 JR |
1974 | return NESTED_EXIT_HOST; |
1975 | break; | |
66a562f7 JR |
1976 | case SVM_EXIT_EXCP_BASE + NM_VECTOR: |
1977 | nm_interception(svm); | |
1978 | break; | |
410e4d57 JR |
1979 | default: |
1980 | break; | |
cf74a78b AG |
1981 | } |
1982 | ||
410e4d57 JR |
1983 | return NESTED_EXIT_CONTINUE; |
1984 | } | |
1985 | ||
1986 | /* | |
1987 | * If this function returns true, this #vmexit was already handled | |
1988 | */ | |
b8e88bc8 | 1989 | static int nested_svm_intercept(struct vcpu_svm *svm) |
410e4d57 JR |
1990 | { |
1991 | u32 exit_code = svm->vmcb->control.exit_code; | |
1992 | int vmexit = NESTED_EXIT_HOST; | |
1993 | ||
cf74a78b | 1994 | switch (exit_code) { |
9c4e40b9 | 1995 | case SVM_EXIT_MSR: |
3d62d9aa | 1996 | vmexit = nested_svm_exit_handled_msr(svm); |
9c4e40b9 | 1997 | break; |
ce2ac085 JR |
1998 | case SVM_EXIT_IOIO: |
1999 | vmexit = nested_svm_intercept_ioio(svm); | |
2000 | break; | |
4ee546b4 RJ |
2001 | case SVM_EXIT_READ_CR0 ... SVM_EXIT_WRITE_CR8: { |
2002 | u32 bit = 1U << (exit_code - SVM_EXIT_READ_CR0); | |
2003 | if (svm->nested.intercept_cr & bit) | |
410e4d57 | 2004 | vmexit = NESTED_EXIT_DONE; |
cf74a78b AG |
2005 | break; |
2006 | } | |
3aed041a JR |
2007 | case SVM_EXIT_READ_DR0 ... SVM_EXIT_WRITE_DR7: { |
2008 | u32 bit = 1U << (exit_code - SVM_EXIT_READ_DR0); | |
2009 | if (svm->nested.intercept_dr & bit) | |
410e4d57 | 2010 | vmexit = NESTED_EXIT_DONE; |
cf74a78b AG |
2011 | break; |
2012 | } | |
2013 | case SVM_EXIT_EXCP_BASE ... SVM_EXIT_EXCP_BASE + 0x1f: { | |
2014 | u32 excp_bits = 1 << (exit_code - SVM_EXIT_EXCP_BASE); | |
aad42c64 | 2015 | if (svm->nested.intercept_exceptions & excp_bits) |
410e4d57 | 2016 | vmexit = NESTED_EXIT_DONE; |
631bc487 GN |
2017 | /* async page fault always cause vmexit */ |
2018 | else if ((exit_code == SVM_EXIT_EXCP_BASE + PF_VECTOR) && | |
2019 | svm->apf_reason != 0) | |
2020 | vmexit = NESTED_EXIT_DONE; | |
cf74a78b AG |
2021 | break; |
2022 | } | |
228070b1 JR |
2023 | case SVM_EXIT_ERR: { |
2024 | vmexit = NESTED_EXIT_DONE; | |
2025 | break; | |
2026 | } | |
cf74a78b AG |
2027 | default: { |
2028 | u64 exit_bits = 1ULL << (exit_code - SVM_EXIT_INTR); | |
aad42c64 | 2029 | if (svm->nested.intercept & exit_bits) |
410e4d57 | 2030 | vmexit = NESTED_EXIT_DONE; |
cf74a78b AG |
2031 | } |
2032 | } | |
2033 | ||
b8e88bc8 JR |
2034 | return vmexit; |
2035 | } | |
2036 | ||
2037 | static int nested_svm_exit_handled(struct vcpu_svm *svm) | |
2038 | { | |
2039 | int vmexit; | |
2040 | ||
2041 | vmexit = nested_svm_intercept(svm); | |
2042 | ||
2043 | if (vmexit == NESTED_EXIT_DONE) | |
9c4e40b9 | 2044 | nested_svm_vmexit(svm); |
9c4e40b9 JR |
2045 | |
2046 | return vmexit; | |
cf74a78b AG |
2047 | } |
2048 | ||
0460a979 JR |
2049 | static inline void copy_vmcb_control_area(struct vmcb *dst_vmcb, struct vmcb *from_vmcb) |
2050 | { | |
2051 | struct vmcb_control_area *dst = &dst_vmcb->control; | |
2052 | struct vmcb_control_area *from = &from_vmcb->control; | |
2053 | ||
4ee546b4 | 2054 | dst->intercept_cr = from->intercept_cr; |
3aed041a | 2055 | dst->intercept_dr = from->intercept_dr; |
0460a979 JR |
2056 | dst->intercept_exceptions = from->intercept_exceptions; |
2057 | dst->intercept = from->intercept; | |
2058 | dst->iopm_base_pa = from->iopm_base_pa; | |
2059 | dst->msrpm_base_pa = from->msrpm_base_pa; | |
2060 | dst->tsc_offset = from->tsc_offset; | |
2061 | dst->asid = from->asid; | |
2062 | dst->tlb_ctl = from->tlb_ctl; | |
2063 | dst->int_ctl = from->int_ctl; | |
2064 | dst->int_vector = from->int_vector; | |
2065 | dst->int_state = from->int_state; | |
2066 | dst->exit_code = from->exit_code; | |
2067 | dst->exit_code_hi = from->exit_code_hi; | |
2068 | dst->exit_info_1 = from->exit_info_1; | |
2069 | dst->exit_info_2 = from->exit_info_2; | |
2070 | dst->exit_int_info = from->exit_int_info; | |
2071 | dst->exit_int_info_err = from->exit_int_info_err; | |
2072 | dst->nested_ctl = from->nested_ctl; | |
2073 | dst->event_inj = from->event_inj; | |
2074 | dst->event_inj_err = from->event_inj_err; | |
2075 | dst->nested_cr3 = from->nested_cr3; | |
2076 | dst->lbr_ctl = from->lbr_ctl; | |
2077 | } | |
2078 | ||
34f80cfa | 2079 | static int nested_svm_vmexit(struct vcpu_svm *svm) |
cf74a78b | 2080 | { |
34f80cfa | 2081 | struct vmcb *nested_vmcb; |
e6aa9abd | 2082 | struct vmcb *hsave = svm->nested.hsave; |
33740e40 | 2083 | struct vmcb *vmcb = svm->vmcb; |
7597f129 | 2084 | struct page *page; |
cf74a78b | 2085 | |
17897f36 JR |
2086 | trace_kvm_nested_vmexit_inject(vmcb->control.exit_code, |
2087 | vmcb->control.exit_info_1, | |
2088 | vmcb->control.exit_info_2, | |
2089 | vmcb->control.exit_int_info, | |
2090 | vmcb->control.exit_int_info_err); | |
2091 | ||
7597f129 | 2092 | nested_vmcb = nested_svm_map(svm, svm->nested.vmcb, &page); |
34f80cfa JR |
2093 | if (!nested_vmcb) |
2094 | return 1; | |
2095 | ||
2030753d JR |
2096 | /* Exit Guest-Mode */ |
2097 | leave_guest_mode(&svm->vcpu); | |
06fc7772 JR |
2098 | svm->nested.vmcb = 0; |
2099 | ||
cf74a78b | 2100 | /* Give the current vmcb to the guest */ |
33740e40 JR |
2101 | disable_gif(svm); |
2102 | ||
2103 | nested_vmcb->save.es = vmcb->save.es; | |
2104 | nested_vmcb->save.cs = vmcb->save.cs; | |
2105 | nested_vmcb->save.ss = vmcb->save.ss; | |
2106 | nested_vmcb->save.ds = vmcb->save.ds; | |
2107 | nested_vmcb->save.gdtr = vmcb->save.gdtr; | |
2108 | nested_vmcb->save.idtr = vmcb->save.idtr; | |
3f6a9d16 | 2109 | nested_vmcb->save.efer = svm->vcpu.arch.efer; |
cdbbdc12 | 2110 | nested_vmcb->save.cr0 = kvm_read_cr0(&svm->vcpu); |
2be4fc7a | 2111 | nested_vmcb->save.cr3 = svm->vcpu.arch.cr3; |
33740e40 | 2112 | nested_vmcb->save.cr2 = vmcb->save.cr2; |
cdbbdc12 | 2113 | nested_vmcb->save.cr4 = svm->vcpu.arch.cr4; |
33740e40 JR |
2114 | nested_vmcb->save.rflags = vmcb->save.rflags; |
2115 | nested_vmcb->save.rip = vmcb->save.rip; | |
2116 | nested_vmcb->save.rsp = vmcb->save.rsp; | |
2117 | nested_vmcb->save.rax = vmcb->save.rax; | |
2118 | nested_vmcb->save.dr7 = vmcb->save.dr7; | |
2119 | nested_vmcb->save.dr6 = vmcb->save.dr6; | |
2120 | nested_vmcb->save.cpl = vmcb->save.cpl; | |
2121 | ||
2122 | nested_vmcb->control.int_ctl = vmcb->control.int_ctl; | |
2123 | nested_vmcb->control.int_vector = vmcb->control.int_vector; | |
2124 | nested_vmcb->control.int_state = vmcb->control.int_state; | |
2125 | nested_vmcb->control.exit_code = vmcb->control.exit_code; | |
2126 | nested_vmcb->control.exit_code_hi = vmcb->control.exit_code_hi; | |
2127 | nested_vmcb->control.exit_info_1 = vmcb->control.exit_info_1; | |
2128 | nested_vmcb->control.exit_info_2 = vmcb->control.exit_info_2; | |
2129 | nested_vmcb->control.exit_int_info = vmcb->control.exit_int_info; | |
2130 | nested_vmcb->control.exit_int_info_err = vmcb->control.exit_int_info_err; | |
7a190667 | 2131 | nested_vmcb->control.next_rip = vmcb->control.next_rip; |
8d23c466 AG |
2132 | |
2133 | /* | |
2134 | * If we emulate a VMRUN/#VMEXIT in the same host #vmexit cycle we have | |
2135 | * to make sure that we do not lose injected events. So check event_inj | |
2136 | * here and copy it to exit_int_info if it is valid. | |
2137 | * Exit_int_info and event_inj can't be both valid because the case | |
2138 | * below only happens on a VMRUN instruction intercept which has | |
2139 | * no valid exit_int_info set. | |
2140 | */ | |
2141 | if (vmcb->control.event_inj & SVM_EVTINJ_VALID) { | |
2142 | struct vmcb_control_area *nc = &nested_vmcb->control; | |
2143 | ||
2144 | nc->exit_int_info = vmcb->control.event_inj; | |
2145 | nc->exit_int_info_err = vmcb->control.event_inj_err; | |
2146 | } | |
2147 | ||
33740e40 JR |
2148 | nested_vmcb->control.tlb_ctl = 0; |
2149 | nested_vmcb->control.event_inj = 0; | |
2150 | nested_vmcb->control.event_inj_err = 0; | |
cf74a78b AG |
2151 | |
2152 | /* We always set V_INTR_MASKING and remember the old value in hflags */ | |
2153 | if (!(svm->vcpu.arch.hflags & HF_VINTR_MASK)) | |
2154 | nested_vmcb->control.int_ctl &= ~V_INTR_MASKING_MASK; | |
2155 | ||
cf74a78b | 2156 | /* Restore the original control entries */ |
0460a979 | 2157 | copy_vmcb_control_area(vmcb, hsave); |
cf74a78b | 2158 | |
219b65dc AG |
2159 | kvm_clear_exception_queue(&svm->vcpu); |
2160 | kvm_clear_interrupt_queue(&svm->vcpu); | |
cf74a78b | 2161 | |
4b16184c JR |
2162 | svm->nested.nested_cr3 = 0; |
2163 | ||
cf74a78b AG |
2164 | /* Restore selected save entries */ |
2165 | svm->vmcb->save.es = hsave->save.es; | |
2166 | svm->vmcb->save.cs = hsave->save.cs; | |
2167 | svm->vmcb->save.ss = hsave->save.ss; | |
2168 | svm->vmcb->save.ds = hsave->save.ds; | |
2169 | svm->vmcb->save.gdtr = hsave->save.gdtr; | |
2170 | svm->vmcb->save.idtr = hsave->save.idtr; | |
2171 | svm->vmcb->save.rflags = hsave->save.rflags; | |
2172 | svm_set_efer(&svm->vcpu, hsave->save.efer); | |
2173 | svm_set_cr0(&svm->vcpu, hsave->save.cr0 | X86_CR0_PE); | |
2174 | svm_set_cr4(&svm->vcpu, hsave->save.cr4); | |
2175 | if (npt_enabled) { | |
2176 | svm->vmcb->save.cr3 = hsave->save.cr3; | |
2177 | svm->vcpu.arch.cr3 = hsave->save.cr3; | |
2178 | } else { | |
2390218b | 2179 | (void)kvm_set_cr3(&svm->vcpu, hsave->save.cr3); |
cf74a78b AG |
2180 | } |
2181 | kvm_register_write(&svm->vcpu, VCPU_REGS_RAX, hsave->save.rax); | |
2182 | kvm_register_write(&svm->vcpu, VCPU_REGS_RSP, hsave->save.rsp); | |
2183 | kvm_register_write(&svm->vcpu, VCPU_REGS_RIP, hsave->save.rip); | |
2184 | svm->vmcb->save.dr7 = 0; | |
2185 | svm->vmcb->save.cpl = 0; | |
2186 | svm->vmcb->control.exit_int_info = 0; | |
2187 | ||
8d28fec4 RJ |
2188 | mark_all_dirty(svm->vmcb); |
2189 | ||
7597f129 | 2190 | nested_svm_unmap(page); |
cf74a78b | 2191 | |
4b16184c | 2192 | nested_svm_uninit_mmu_context(&svm->vcpu); |
cf74a78b AG |
2193 | kvm_mmu_reset_context(&svm->vcpu); |
2194 | kvm_mmu_load(&svm->vcpu); | |
2195 | ||
2196 | return 0; | |
2197 | } | |
3d6368ef | 2198 | |
9738b2c9 | 2199 | static bool nested_svm_vmrun_msrpm(struct vcpu_svm *svm) |
3d6368ef | 2200 | { |
323c3d80 JR |
2201 | /* |
2202 | * This function merges the msr permission bitmaps of kvm and the | |
2203 | * nested vmcb. It is omptimized in that it only merges the parts where | |
2204 | * the kvm msr permission bitmap may contain zero bits | |
2205 | */ | |
3d6368ef | 2206 | int i; |
9738b2c9 | 2207 | |
323c3d80 JR |
2208 | if (!(svm->nested.intercept & (1ULL << INTERCEPT_MSR_PROT))) |
2209 | return true; | |
9738b2c9 | 2210 | |
323c3d80 JR |
2211 | for (i = 0; i < MSRPM_OFFSETS; i++) { |
2212 | u32 value, p; | |
2213 | u64 offset; | |
9738b2c9 | 2214 | |
323c3d80 JR |
2215 | if (msrpm_offsets[i] == 0xffffffff) |
2216 | break; | |
3d6368ef | 2217 | |
0d6b3537 JR |
2218 | p = msrpm_offsets[i]; |
2219 | offset = svm->nested.vmcb_msrpm + (p * 4); | |
323c3d80 JR |
2220 | |
2221 | if (kvm_read_guest(svm->vcpu.kvm, offset, &value, 4)) | |
2222 | return false; | |
2223 | ||
2224 | svm->nested.msrpm[p] = svm->msrpm[p] | value; | |
2225 | } | |
3d6368ef | 2226 | |
323c3d80 | 2227 | svm->vmcb->control.msrpm_base_pa = __pa(svm->nested.msrpm); |
9738b2c9 JR |
2228 | |
2229 | return true; | |
3d6368ef AG |
2230 | } |
2231 | ||
52c65a30 JR |
2232 | static bool nested_vmcb_checks(struct vmcb *vmcb) |
2233 | { | |
2234 | if ((vmcb->control.intercept & (1ULL << INTERCEPT_VMRUN)) == 0) | |
2235 | return false; | |
2236 | ||
dbe77584 JR |
2237 | if (vmcb->control.asid == 0) |
2238 | return false; | |
2239 | ||
4b16184c JR |
2240 | if (vmcb->control.nested_ctl && !npt_enabled) |
2241 | return false; | |
2242 | ||
52c65a30 JR |
2243 | return true; |
2244 | } | |
2245 | ||
9738b2c9 | 2246 | static bool nested_svm_vmrun(struct vcpu_svm *svm) |
3d6368ef | 2247 | { |
9738b2c9 | 2248 | struct vmcb *nested_vmcb; |
e6aa9abd | 2249 | struct vmcb *hsave = svm->nested.hsave; |
defbba56 | 2250 | struct vmcb *vmcb = svm->vmcb; |
7597f129 | 2251 | struct page *page; |
06fc7772 | 2252 | u64 vmcb_gpa; |
3d6368ef | 2253 | |
06fc7772 | 2254 | vmcb_gpa = svm->vmcb->save.rax; |
3d6368ef | 2255 | |
7597f129 | 2256 | nested_vmcb = nested_svm_map(svm, svm->vmcb->save.rax, &page); |
9738b2c9 JR |
2257 | if (!nested_vmcb) |
2258 | return false; | |
2259 | ||
52c65a30 JR |
2260 | if (!nested_vmcb_checks(nested_vmcb)) { |
2261 | nested_vmcb->control.exit_code = SVM_EXIT_ERR; | |
2262 | nested_vmcb->control.exit_code_hi = 0; | |
2263 | nested_vmcb->control.exit_info_1 = 0; | |
2264 | nested_vmcb->control.exit_info_2 = 0; | |
2265 | ||
2266 | nested_svm_unmap(page); | |
2267 | ||
2268 | return false; | |
2269 | } | |
2270 | ||
b75f4eb3 | 2271 | trace_kvm_nested_vmrun(svm->vmcb->save.rip, vmcb_gpa, |
0ac406de JR |
2272 | nested_vmcb->save.rip, |
2273 | nested_vmcb->control.int_ctl, | |
2274 | nested_vmcb->control.event_inj, | |
2275 | nested_vmcb->control.nested_ctl); | |
2276 | ||
4ee546b4 RJ |
2277 | trace_kvm_nested_intercepts(nested_vmcb->control.intercept_cr & 0xffff, |
2278 | nested_vmcb->control.intercept_cr >> 16, | |
2e554e8d JR |
2279 | nested_vmcb->control.intercept_exceptions, |
2280 | nested_vmcb->control.intercept); | |
2281 | ||
3d6368ef | 2282 | /* Clear internal status */ |
219b65dc AG |
2283 | kvm_clear_exception_queue(&svm->vcpu); |
2284 | kvm_clear_interrupt_queue(&svm->vcpu); | |
3d6368ef | 2285 | |
e0231715 JR |
2286 | /* |
2287 | * Save the old vmcb, so we don't need to pick what we save, but can | |
2288 | * restore everything when a VMEXIT occurs | |
2289 | */ | |
defbba56 JR |
2290 | hsave->save.es = vmcb->save.es; |
2291 | hsave->save.cs = vmcb->save.cs; | |
2292 | hsave->save.ss = vmcb->save.ss; | |
2293 | hsave->save.ds = vmcb->save.ds; | |
2294 | hsave->save.gdtr = vmcb->save.gdtr; | |
2295 | hsave->save.idtr = vmcb->save.idtr; | |
f6801dff | 2296 | hsave->save.efer = svm->vcpu.arch.efer; |
4d4ec087 | 2297 | hsave->save.cr0 = kvm_read_cr0(&svm->vcpu); |
defbba56 JR |
2298 | hsave->save.cr4 = svm->vcpu.arch.cr4; |
2299 | hsave->save.rflags = vmcb->save.rflags; | |
b75f4eb3 | 2300 | hsave->save.rip = kvm_rip_read(&svm->vcpu); |
defbba56 JR |
2301 | hsave->save.rsp = vmcb->save.rsp; |
2302 | hsave->save.rax = vmcb->save.rax; | |
2303 | if (npt_enabled) | |
2304 | hsave->save.cr3 = vmcb->save.cr3; | |
2305 | else | |
2306 | hsave->save.cr3 = svm->vcpu.arch.cr3; | |
2307 | ||
0460a979 | 2308 | copy_vmcb_control_area(hsave, vmcb); |
3d6368ef AG |
2309 | |
2310 | if (svm->vmcb->save.rflags & X86_EFLAGS_IF) | |
2311 | svm->vcpu.arch.hflags |= HF_HIF_MASK; | |
2312 | else | |
2313 | svm->vcpu.arch.hflags &= ~HF_HIF_MASK; | |
2314 | ||
4b16184c JR |
2315 | if (nested_vmcb->control.nested_ctl) { |
2316 | kvm_mmu_unload(&svm->vcpu); | |
2317 | svm->nested.nested_cr3 = nested_vmcb->control.nested_cr3; | |
2318 | nested_svm_init_mmu_context(&svm->vcpu); | |
2319 | } | |
2320 | ||
3d6368ef AG |
2321 | /* Load the nested guest state */ |
2322 | svm->vmcb->save.es = nested_vmcb->save.es; | |
2323 | svm->vmcb->save.cs = nested_vmcb->save.cs; | |
2324 | svm->vmcb->save.ss = nested_vmcb->save.ss; | |
2325 | svm->vmcb->save.ds = nested_vmcb->save.ds; | |
2326 | svm->vmcb->save.gdtr = nested_vmcb->save.gdtr; | |
2327 | svm->vmcb->save.idtr = nested_vmcb->save.idtr; | |
2328 | svm->vmcb->save.rflags = nested_vmcb->save.rflags; | |
2329 | svm_set_efer(&svm->vcpu, nested_vmcb->save.efer); | |
2330 | svm_set_cr0(&svm->vcpu, nested_vmcb->save.cr0); | |
2331 | svm_set_cr4(&svm->vcpu, nested_vmcb->save.cr4); | |
2332 | if (npt_enabled) { | |
2333 | svm->vmcb->save.cr3 = nested_vmcb->save.cr3; | |
2334 | svm->vcpu.arch.cr3 = nested_vmcb->save.cr3; | |
0e5cbe36 | 2335 | } else |
2390218b | 2336 | (void)kvm_set_cr3(&svm->vcpu, nested_vmcb->save.cr3); |
0e5cbe36 JR |
2337 | |
2338 | /* Guest paging mode is active - reset mmu */ | |
2339 | kvm_mmu_reset_context(&svm->vcpu); | |
2340 | ||
defbba56 | 2341 | svm->vmcb->save.cr2 = svm->vcpu.arch.cr2 = nested_vmcb->save.cr2; |
3d6368ef AG |
2342 | kvm_register_write(&svm->vcpu, VCPU_REGS_RAX, nested_vmcb->save.rax); |
2343 | kvm_register_write(&svm->vcpu, VCPU_REGS_RSP, nested_vmcb->save.rsp); | |
2344 | kvm_register_write(&svm->vcpu, VCPU_REGS_RIP, nested_vmcb->save.rip); | |
e0231715 | 2345 | |
3d6368ef AG |
2346 | /* In case we don't even reach vcpu_run, the fields are not updated */ |
2347 | svm->vmcb->save.rax = nested_vmcb->save.rax; | |
2348 | svm->vmcb->save.rsp = nested_vmcb->save.rsp; | |
2349 | svm->vmcb->save.rip = nested_vmcb->save.rip; | |
2350 | svm->vmcb->save.dr7 = nested_vmcb->save.dr7; | |
2351 | svm->vmcb->save.dr6 = nested_vmcb->save.dr6; | |
2352 | svm->vmcb->save.cpl = nested_vmcb->save.cpl; | |
2353 | ||
f7138538 | 2354 | svm->nested.vmcb_msrpm = nested_vmcb->control.msrpm_base_pa & ~0x0fffULL; |
ce2ac085 | 2355 | svm->nested.vmcb_iopm = nested_vmcb->control.iopm_base_pa & ~0x0fffULL; |
3d6368ef | 2356 | |
aad42c64 | 2357 | /* cache intercepts */ |
4ee546b4 | 2358 | svm->nested.intercept_cr = nested_vmcb->control.intercept_cr; |
3aed041a | 2359 | svm->nested.intercept_dr = nested_vmcb->control.intercept_dr; |
aad42c64 JR |
2360 | svm->nested.intercept_exceptions = nested_vmcb->control.intercept_exceptions; |
2361 | svm->nested.intercept = nested_vmcb->control.intercept; | |
2362 | ||
3d6368ef | 2363 | force_new_asid(&svm->vcpu); |
3d6368ef | 2364 | svm->vmcb->control.int_ctl = nested_vmcb->control.int_ctl | V_INTR_MASKING_MASK; |
3d6368ef AG |
2365 | if (nested_vmcb->control.int_ctl & V_INTR_MASKING_MASK) |
2366 | svm->vcpu.arch.hflags |= HF_VINTR_MASK; | |
2367 | else | |
2368 | svm->vcpu.arch.hflags &= ~HF_VINTR_MASK; | |
2369 | ||
88ab24ad JR |
2370 | if (svm->vcpu.arch.hflags & HF_VINTR_MASK) { |
2371 | /* We only want the cr8 intercept bits of the guest */ | |
4ee546b4 RJ |
2372 | clr_cr_intercept(svm, INTERCEPT_CR8_READ); |
2373 | clr_cr_intercept(svm, INTERCEPT_CR8_WRITE); | |
88ab24ad JR |
2374 | } |
2375 | ||
0d945bd9 | 2376 | /* We don't want to see VMMCALLs from a nested guest */ |
8a05a1b8 | 2377 | clr_intercept(svm, INTERCEPT_VMMCALL); |
0d945bd9 | 2378 | |
88ab24ad | 2379 | svm->vmcb->control.lbr_ctl = nested_vmcb->control.lbr_ctl; |
3d6368ef AG |
2380 | svm->vmcb->control.int_vector = nested_vmcb->control.int_vector; |
2381 | svm->vmcb->control.int_state = nested_vmcb->control.int_state; | |
2382 | svm->vmcb->control.tsc_offset += nested_vmcb->control.tsc_offset; | |
3d6368ef AG |
2383 | svm->vmcb->control.event_inj = nested_vmcb->control.event_inj; |
2384 | svm->vmcb->control.event_inj_err = nested_vmcb->control.event_inj_err; | |
2385 | ||
7597f129 | 2386 | nested_svm_unmap(page); |
9738b2c9 | 2387 | |
2030753d JR |
2388 | /* Enter Guest-Mode */ |
2389 | enter_guest_mode(&svm->vcpu); | |
2390 | ||
384c6368 JR |
2391 | /* |
2392 | * Merge guest and host intercepts - must be called with vcpu in | |
2393 | * guest-mode to take affect here | |
2394 | */ | |
2395 | recalc_intercepts(svm); | |
2396 | ||
06fc7772 | 2397 | svm->nested.vmcb = vmcb_gpa; |
9738b2c9 | 2398 | |
2af9194d | 2399 | enable_gif(svm); |
3d6368ef | 2400 | |
8d28fec4 RJ |
2401 | mark_all_dirty(svm->vmcb); |
2402 | ||
9738b2c9 | 2403 | return true; |
3d6368ef AG |
2404 | } |
2405 | ||
9966bf68 | 2406 | static void nested_svm_vmloadsave(struct vmcb *from_vmcb, struct vmcb *to_vmcb) |
5542675b AG |
2407 | { |
2408 | to_vmcb->save.fs = from_vmcb->save.fs; | |
2409 | to_vmcb->save.gs = from_vmcb->save.gs; | |
2410 | to_vmcb->save.tr = from_vmcb->save.tr; | |
2411 | to_vmcb->save.ldtr = from_vmcb->save.ldtr; | |
2412 | to_vmcb->save.kernel_gs_base = from_vmcb->save.kernel_gs_base; | |
2413 | to_vmcb->save.star = from_vmcb->save.star; | |
2414 | to_vmcb->save.lstar = from_vmcb->save.lstar; | |
2415 | to_vmcb->save.cstar = from_vmcb->save.cstar; | |
2416 | to_vmcb->save.sfmask = from_vmcb->save.sfmask; | |
2417 | to_vmcb->save.sysenter_cs = from_vmcb->save.sysenter_cs; | |
2418 | to_vmcb->save.sysenter_esp = from_vmcb->save.sysenter_esp; | |
2419 | to_vmcb->save.sysenter_eip = from_vmcb->save.sysenter_eip; | |
5542675b AG |
2420 | } |
2421 | ||
851ba692 | 2422 | static int vmload_interception(struct vcpu_svm *svm) |
5542675b | 2423 | { |
9966bf68 | 2424 | struct vmcb *nested_vmcb; |
7597f129 | 2425 | struct page *page; |
9966bf68 | 2426 | |
5542675b AG |
2427 | if (nested_svm_check_permissions(svm)) |
2428 | return 1; | |
2429 | ||
2430 | svm->next_rip = kvm_rip_read(&svm->vcpu) + 3; | |
2431 | skip_emulated_instruction(&svm->vcpu); | |
2432 | ||
7597f129 | 2433 | nested_vmcb = nested_svm_map(svm, svm->vmcb->save.rax, &page); |
9966bf68 JR |
2434 | if (!nested_vmcb) |
2435 | return 1; | |
2436 | ||
2437 | nested_svm_vmloadsave(nested_vmcb, svm->vmcb); | |
7597f129 | 2438 | nested_svm_unmap(page); |
5542675b AG |
2439 | |
2440 | return 1; | |
2441 | } | |
2442 | ||
851ba692 | 2443 | static int vmsave_interception(struct vcpu_svm *svm) |
5542675b | 2444 | { |
9966bf68 | 2445 | struct vmcb *nested_vmcb; |
7597f129 | 2446 | struct page *page; |
9966bf68 | 2447 | |
5542675b AG |
2448 | if (nested_svm_check_permissions(svm)) |
2449 | return 1; | |
2450 | ||
2451 | svm->next_rip = kvm_rip_read(&svm->vcpu) + 3; | |
2452 | skip_emulated_instruction(&svm->vcpu); | |
2453 | ||
7597f129 | 2454 | nested_vmcb = nested_svm_map(svm, svm->vmcb->save.rax, &page); |
9966bf68 JR |
2455 | if (!nested_vmcb) |
2456 | return 1; | |
2457 | ||
2458 | nested_svm_vmloadsave(svm->vmcb, nested_vmcb); | |
7597f129 | 2459 | nested_svm_unmap(page); |
5542675b AG |
2460 | |
2461 | return 1; | |
2462 | } | |
2463 | ||
851ba692 | 2464 | static int vmrun_interception(struct vcpu_svm *svm) |
3d6368ef | 2465 | { |
3d6368ef AG |
2466 | if (nested_svm_check_permissions(svm)) |
2467 | return 1; | |
2468 | ||
b75f4eb3 RJ |
2469 | /* Save rip after vmrun instruction */ |
2470 | kvm_rip_write(&svm->vcpu, kvm_rip_read(&svm->vcpu) + 3); | |
3d6368ef | 2471 | |
9738b2c9 | 2472 | if (!nested_svm_vmrun(svm)) |
3d6368ef AG |
2473 | return 1; |
2474 | ||
9738b2c9 | 2475 | if (!nested_svm_vmrun_msrpm(svm)) |
1f8da478 JR |
2476 | goto failed; |
2477 | ||
2478 | return 1; | |
2479 | ||
2480 | failed: | |
2481 | ||
2482 | svm->vmcb->control.exit_code = SVM_EXIT_ERR; | |
2483 | svm->vmcb->control.exit_code_hi = 0; | |
2484 | svm->vmcb->control.exit_info_1 = 0; | |
2485 | svm->vmcb->control.exit_info_2 = 0; | |
2486 | ||
2487 | nested_svm_vmexit(svm); | |
3d6368ef AG |
2488 | |
2489 | return 1; | |
2490 | } | |
2491 | ||
851ba692 | 2492 | static int stgi_interception(struct vcpu_svm *svm) |
1371d904 AG |
2493 | { |
2494 | if (nested_svm_check_permissions(svm)) | |
2495 | return 1; | |
2496 | ||
2497 | svm->next_rip = kvm_rip_read(&svm->vcpu) + 3; | |
2498 | skip_emulated_instruction(&svm->vcpu); | |
3842d135 | 2499 | kvm_make_request(KVM_REQ_EVENT, &svm->vcpu); |
1371d904 | 2500 | |
2af9194d | 2501 | enable_gif(svm); |
1371d904 AG |
2502 | |
2503 | return 1; | |
2504 | } | |
2505 | ||
851ba692 | 2506 | static int clgi_interception(struct vcpu_svm *svm) |
1371d904 AG |
2507 | { |
2508 | if (nested_svm_check_permissions(svm)) | |
2509 | return 1; | |
2510 | ||
2511 | svm->next_rip = kvm_rip_read(&svm->vcpu) + 3; | |
2512 | skip_emulated_instruction(&svm->vcpu); | |
2513 | ||
2af9194d | 2514 | disable_gif(svm); |
1371d904 AG |
2515 | |
2516 | /* After a CLGI no interrupts should come */ | |
2517 | svm_clear_vintr(svm); | |
2518 | svm->vmcb->control.int_ctl &= ~V_IRQ_MASK; | |
2519 | ||
decdbf6a JR |
2520 | mark_dirty(svm->vmcb, VMCB_INTR); |
2521 | ||
1371d904 AG |
2522 | return 1; |
2523 | } | |
2524 | ||
851ba692 | 2525 | static int invlpga_interception(struct vcpu_svm *svm) |
ff092385 AG |
2526 | { |
2527 | struct kvm_vcpu *vcpu = &svm->vcpu; | |
ff092385 | 2528 | |
ec1ff790 JR |
2529 | trace_kvm_invlpga(svm->vmcb->save.rip, vcpu->arch.regs[VCPU_REGS_RCX], |
2530 | vcpu->arch.regs[VCPU_REGS_RAX]); | |
2531 | ||
ff092385 AG |
2532 | /* Let's treat INVLPGA the same as INVLPG (can be optimized!) */ |
2533 | kvm_mmu_invlpg(vcpu, vcpu->arch.regs[VCPU_REGS_RAX]); | |
2534 | ||
2535 | svm->next_rip = kvm_rip_read(&svm->vcpu) + 3; | |
2536 | skip_emulated_instruction(&svm->vcpu); | |
2537 | return 1; | |
2538 | } | |
2539 | ||
532a46b9 JR |
2540 | static int skinit_interception(struct vcpu_svm *svm) |
2541 | { | |
2542 | trace_kvm_skinit(svm->vmcb->save.rip, svm->vcpu.arch.regs[VCPU_REGS_RAX]); | |
2543 | ||
2544 | kvm_queue_exception(&svm->vcpu, UD_VECTOR); | |
2545 | return 1; | |
2546 | } | |
2547 | ||
851ba692 | 2548 | static int invalid_op_interception(struct vcpu_svm *svm) |
6aa8b732 | 2549 | { |
7ee5d940 | 2550 | kvm_queue_exception(&svm->vcpu, UD_VECTOR); |
6aa8b732 AK |
2551 | return 1; |
2552 | } | |
2553 | ||
851ba692 | 2554 | static int task_switch_interception(struct vcpu_svm *svm) |
6aa8b732 | 2555 | { |
37817f29 | 2556 | u16 tss_selector; |
64a7ec06 GN |
2557 | int reason; |
2558 | int int_type = svm->vmcb->control.exit_int_info & | |
2559 | SVM_EXITINTINFO_TYPE_MASK; | |
8317c298 | 2560 | int int_vec = svm->vmcb->control.exit_int_info & SVM_EVTINJ_VEC_MASK; |
fe8e7f83 GN |
2561 | uint32_t type = |
2562 | svm->vmcb->control.exit_int_info & SVM_EXITINTINFO_TYPE_MASK; | |
2563 | uint32_t idt_v = | |
2564 | svm->vmcb->control.exit_int_info & SVM_EXITINTINFO_VALID; | |
e269fb21 JK |
2565 | bool has_error_code = false; |
2566 | u32 error_code = 0; | |
37817f29 IE |
2567 | |
2568 | tss_selector = (u16)svm->vmcb->control.exit_info_1; | |
64a7ec06 | 2569 | |
37817f29 IE |
2570 | if (svm->vmcb->control.exit_info_2 & |
2571 | (1ULL << SVM_EXITINFOSHIFT_TS_REASON_IRET)) | |
64a7ec06 GN |
2572 | reason = TASK_SWITCH_IRET; |
2573 | else if (svm->vmcb->control.exit_info_2 & | |
2574 | (1ULL << SVM_EXITINFOSHIFT_TS_REASON_JMP)) | |
2575 | reason = TASK_SWITCH_JMP; | |
fe8e7f83 | 2576 | else if (idt_v) |
64a7ec06 GN |
2577 | reason = TASK_SWITCH_GATE; |
2578 | else | |
2579 | reason = TASK_SWITCH_CALL; | |
2580 | ||
fe8e7f83 GN |
2581 | if (reason == TASK_SWITCH_GATE) { |
2582 | switch (type) { | |
2583 | case SVM_EXITINTINFO_TYPE_NMI: | |
2584 | svm->vcpu.arch.nmi_injected = false; | |
2585 | break; | |
2586 | case SVM_EXITINTINFO_TYPE_EXEPT: | |
e269fb21 JK |
2587 | if (svm->vmcb->control.exit_info_2 & |
2588 | (1ULL << SVM_EXITINFOSHIFT_TS_HAS_ERROR_CODE)) { | |
2589 | has_error_code = true; | |
2590 | error_code = | |
2591 | (u32)svm->vmcb->control.exit_info_2; | |
2592 | } | |
fe8e7f83 GN |
2593 | kvm_clear_exception_queue(&svm->vcpu); |
2594 | break; | |
2595 | case SVM_EXITINTINFO_TYPE_INTR: | |
2596 | kvm_clear_interrupt_queue(&svm->vcpu); | |
2597 | break; | |
2598 | default: | |
2599 | break; | |
2600 | } | |
2601 | } | |
64a7ec06 | 2602 | |
8317c298 GN |
2603 | if (reason != TASK_SWITCH_GATE || |
2604 | int_type == SVM_EXITINTINFO_TYPE_SOFT || | |
2605 | (int_type == SVM_EXITINTINFO_TYPE_EXEPT && | |
f629cf84 GN |
2606 | (int_vec == OF_VECTOR || int_vec == BP_VECTOR))) |
2607 | skip_emulated_instruction(&svm->vcpu); | |
64a7ec06 | 2608 | |
acb54517 GN |
2609 | if (kvm_task_switch(&svm->vcpu, tss_selector, reason, |
2610 | has_error_code, error_code) == EMULATE_FAIL) { | |
2611 | svm->vcpu.run->exit_reason = KVM_EXIT_INTERNAL_ERROR; | |
2612 | svm->vcpu.run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION; | |
2613 | svm->vcpu.run->internal.ndata = 0; | |
2614 | return 0; | |
2615 | } | |
2616 | return 1; | |
6aa8b732 AK |
2617 | } |
2618 | ||
851ba692 | 2619 | static int cpuid_interception(struct vcpu_svm *svm) |
6aa8b732 | 2620 | { |
5fdbf976 | 2621 | svm->next_rip = kvm_rip_read(&svm->vcpu) + 2; |
e756fc62 | 2622 | kvm_emulate_cpuid(&svm->vcpu); |
06465c5a | 2623 | return 1; |
6aa8b732 AK |
2624 | } |
2625 | ||
851ba692 | 2626 | static int iret_interception(struct vcpu_svm *svm) |
95ba8273 GN |
2627 | { |
2628 | ++svm->vcpu.stat.nmi_window_exits; | |
8a05a1b8 | 2629 | clr_intercept(svm, INTERCEPT_IRET); |
44c11430 | 2630 | svm->vcpu.arch.hflags |= HF_IRET_MASK; |
95ba8273 GN |
2631 | return 1; |
2632 | } | |
2633 | ||
851ba692 | 2634 | static int invlpg_interception(struct vcpu_svm *svm) |
a7052897 | 2635 | { |
6d77dbfc | 2636 | return emulate_instruction(&svm->vcpu, 0, 0, 0) == EMULATE_DONE; |
a7052897 MT |
2637 | } |
2638 | ||
851ba692 | 2639 | static int emulate_on_interception(struct vcpu_svm *svm) |
6aa8b732 | 2640 | { |
6d77dbfc | 2641 | return emulate_instruction(&svm->vcpu, 0, 0, 0) == EMULATE_DONE; |
6aa8b732 AK |
2642 | } |
2643 | ||
cda00082 JR |
2644 | static int cr0_write_interception(struct vcpu_svm *svm) |
2645 | { | |
2646 | struct kvm_vcpu *vcpu = &svm->vcpu; | |
2647 | int r; | |
2648 | ||
2649 | r = emulate_instruction(&svm->vcpu, 0, 0, 0); | |
2650 | ||
2651 | if (svm->nested.vmexit_rip) { | |
2652 | kvm_register_write(vcpu, VCPU_REGS_RIP, svm->nested.vmexit_rip); | |
2653 | kvm_register_write(vcpu, VCPU_REGS_RSP, svm->nested.vmexit_rsp); | |
2654 | kvm_register_write(vcpu, VCPU_REGS_RAX, svm->nested.vmexit_rax); | |
2655 | svm->nested.vmexit_rip = 0; | |
2656 | } | |
2657 | ||
2658 | return r == EMULATE_DONE; | |
2659 | } | |
2660 | ||
851ba692 | 2661 | static int cr8_write_interception(struct vcpu_svm *svm) |
1d075434 | 2662 | { |
851ba692 AK |
2663 | struct kvm_run *kvm_run = svm->vcpu.run; |
2664 | ||
0a5fff19 GN |
2665 | u8 cr8_prev = kvm_get_cr8(&svm->vcpu); |
2666 | /* instruction emulation calls kvm_set_cr8() */ | |
851ba692 | 2667 | emulate_instruction(&svm->vcpu, 0, 0, 0); |
95ba8273 | 2668 | if (irqchip_in_kernel(svm->vcpu.kvm)) { |
4ee546b4 | 2669 | clr_cr_intercept(svm, INTERCEPT_CR8_WRITE); |
1d075434 | 2670 | return 1; |
95ba8273 | 2671 | } |
0a5fff19 GN |
2672 | if (cr8_prev <= kvm_get_cr8(&svm->vcpu)) |
2673 | return 1; | |
1d075434 JR |
2674 | kvm_run->exit_reason = KVM_EXIT_SET_TPR; |
2675 | return 0; | |
2676 | } | |
2677 | ||
6aa8b732 AK |
2678 | static int svm_get_msr(struct kvm_vcpu *vcpu, unsigned ecx, u64 *data) |
2679 | { | |
a2fa3e9f GH |
2680 | struct vcpu_svm *svm = to_svm(vcpu); |
2681 | ||
6aa8b732 | 2682 | switch (ecx) { |
af24a4e4 | 2683 | case MSR_IA32_TSC: { |
4cc70310 | 2684 | struct vmcb *vmcb = get_host_vmcb(svm); |
6aa8b732 | 2685 | |
4cc70310 | 2686 | *data = vmcb->control.tsc_offset + native_read_tsc(); |
6aa8b732 AK |
2687 | break; |
2688 | } | |
8c06585d | 2689 | case MSR_STAR: |
a2fa3e9f | 2690 | *data = svm->vmcb->save.star; |
6aa8b732 | 2691 | break; |
0e859cac | 2692 | #ifdef CONFIG_X86_64 |
6aa8b732 | 2693 | case MSR_LSTAR: |
a2fa3e9f | 2694 | *data = svm->vmcb->save.lstar; |
6aa8b732 AK |
2695 | break; |
2696 | case MSR_CSTAR: | |
a2fa3e9f | 2697 | *data = svm->vmcb->save.cstar; |
6aa8b732 AK |
2698 | break; |
2699 | case MSR_KERNEL_GS_BASE: | |
a2fa3e9f | 2700 | *data = svm->vmcb->save.kernel_gs_base; |
6aa8b732 AK |
2701 | break; |
2702 | case MSR_SYSCALL_MASK: | |
a2fa3e9f | 2703 | *data = svm->vmcb->save.sfmask; |
6aa8b732 AK |
2704 | break; |
2705 | #endif | |
2706 | case MSR_IA32_SYSENTER_CS: | |
a2fa3e9f | 2707 | *data = svm->vmcb->save.sysenter_cs; |
6aa8b732 AK |
2708 | break; |
2709 | case MSR_IA32_SYSENTER_EIP: | |
017cb99e | 2710 | *data = svm->sysenter_eip; |
6aa8b732 AK |
2711 | break; |
2712 | case MSR_IA32_SYSENTER_ESP: | |
017cb99e | 2713 | *data = svm->sysenter_esp; |
6aa8b732 | 2714 | break; |
e0231715 JR |
2715 | /* |
2716 | * Nobody will change the following 5 values in the VMCB so we can | |
2717 | * safely return them on rdmsr. They will always be 0 until LBRV is | |
2718 | * implemented. | |
2719 | */ | |
a2938c80 JR |
2720 | case MSR_IA32_DEBUGCTLMSR: |
2721 | *data = svm->vmcb->save.dbgctl; | |
2722 | break; | |
2723 | case MSR_IA32_LASTBRANCHFROMIP: | |
2724 | *data = svm->vmcb->save.br_from; | |
2725 | break; | |
2726 | case MSR_IA32_LASTBRANCHTOIP: | |
2727 | *data = svm->vmcb->save.br_to; | |
2728 | break; | |
2729 | case MSR_IA32_LASTINTFROMIP: | |
2730 | *data = svm->vmcb->save.last_excp_from; | |
2731 | break; | |
2732 | case MSR_IA32_LASTINTTOIP: | |
2733 | *data = svm->vmcb->save.last_excp_to; | |
2734 | break; | |
b286d5d8 | 2735 | case MSR_VM_HSAVE_PA: |
e6aa9abd | 2736 | *data = svm->nested.hsave_msr; |
b286d5d8 | 2737 | break; |
eb6f302e | 2738 | case MSR_VM_CR: |
4a810181 | 2739 | *data = svm->nested.vm_cr_msr; |
eb6f302e | 2740 | break; |
c8a73f18 AG |
2741 | case MSR_IA32_UCODE_REV: |
2742 | *data = 0x01000065; | |
2743 | break; | |
6aa8b732 | 2744 | default: |
3bab1f5d | 2745 | return kvm_get_msr_common(vcpu, ecx, data); |
6aa8b732 AK |
2746 | } |
2747 | return 0; | |
2748 | } | |
2749 | ||
851ba692 | 2750 | static int rdmsr_interception(struct vcpu_svm *svm) |
6aa8b732 | 2751 | { |
ad312c7c | 2752 | u32 ecx = svm->vcpu.arch.regs[VCPU_REGS_RCX]; |
6aa8b732 AK |
2753 | u64 data; |
2754 | ||
59200273 AK |
2755 | if (svm_get_msr(&svm->vcpu, ecx, &data)) { |
2756 | trace_kvm_msr_read_ex(ecx); | |
c1a5d4f9 | 2757 | kvm_inject_gp(&svm->vcpu, 0); |
59200273 | 2758 | } else { |
229456fc | 2759 | trace_kvm_msr_read(ecx, data); |
af9ca2d7 | 2760 | |
5fdbf976 | 2761 | svm->vcpu.arch.regs[VCPU_REGS_RAX] = data & 0xffffffff; |
ad312c7c | 2762 | svm->vcpu.arch.regs[VCPU_REGS_RDX] = data >> 32; |
5fdbf976 | 2763 | svm->next_rip = kvm_rip_read(&svm->vcpu) + 2; |
e756fc62 | 2764 | skip_emulated_instruction(&svm->vcpu); |
6aa8b732 AK |
2765 | } |
2766 | return 1; | |
2767 | } | |
2768 | ||
4a810181 JR |
2769 | static int svm_set_vm_cr(struct kvm_vcpu *vcpu, u64 data) |
2770 | { | |
2771 | struct vcpu_svm *svm = to_svm(vcpu); | |
2772 | int svm_dis, chg_mask; | |
2773 | ||
2774 | if (data & ~SVM_VM_CR_VALID_MASK) | |
2775 | return 1; | |
2776 | ||
2777 | chg_mask = SVM_VM_CR_VALID_MASK; | |
2778 | ||
2779 | if (svm->nested.vm_cr_msr & SVM_VM_CR_SVM_DIS_MASK) | |
2780 | chg_mask &= ~(SVM_VM_CR_SVM_LOCK_MASK | SVM_VM_CR_SVM_DIS_MASK); | |
2781 | ||
2782 | svm->nested.vm_cr_msr &= ~chg_mask; | |
2783 | svm->nested.vm_cr_msr |= (data & chg_mask); | |
2784 | ||
2785 | svm_dis = svm->nested.vm_cr_msr & SVM_VM_CR_SVM_DIS_MASK; | |
2786 | ||
2787 | /* check for svm_disable while efer.svme is set */ | |
2788 | if (svm_dis && (vcpu->arch.efer & EFER_SVME)) | |
2789 | return 1; | |
2790 | ||
2791 | return 0; | |
2792 | } | |
2793 | ||
6aa8b732 AK |
2794 | static int svm_set_msr(struct kvm_vcpu *vcpu, unsigned ecx, u64 data) |
2795 | { | |
a2fa3e9f GH |
2796 | struct vcpu_svm *svm = to_svm(vcpu); |
2797 | ||
6aa8b732 | 2798 | switch (ecx) { |
f4e1b3c8 | 2799 | case MSR_IA32_TSC: |
99e3e30a | 2800 | kvm_write_tsc(vcpu, data); |
6aa8b732 | 2801 | break; |
8c06585d | 2802 | case MSR_STAR: |
a2fa3e9f | 2803 | svm->vmcb->save.star = data; |
6aa8b732 | 2804 | break; |
49b14f24 | 2805 | #ifdef CONFIG_X86_64 |
6aa8b732 | 2806 | case MSR_LSTAR: |
a2fa3e9f | 2807 | svm->vmcb->save.lstar = data; |
6aa8b732 AK |
2808 | break; |
2809 | case MSR_CSTAR: | |
a2fa3e9f | 2810 | svm->vmcb->save.cstar = data; |
6aa8b732 AK |
2811 | break; |
2812 | case MSR_KERNEL_GS_BASE: | |
a2fa3e9f | 2813 | svm->vmcb->save.kernel_gs_base = data; |
6aa8b732 AK |
2814 | break; |
2815 | case MSR_SYSCALL_MASK: | |
a2fa3e9f | 2816 | svm->vmcb->save.sfmask = data; |
6aa8b732 AK |
2817 | break; |
2818 | #endif | |
2819 | case MSR_IA32_SYSENTER_CS: | |
a2fa3e9f | 2820 | svm->vmcb->save.sysenter_cs = data; |
6aa8b732 AK |
2821 | break; |
2822 | case MSR_IA32_SYSENTER_EIP: | |
017cb99e | 2823 | svm->sysenter_eip = data; |
a2fa3e9f | 2824 | svm->vmcb->save.sysenter_eip = data; |
6aa8b732 AK |
2825 | break; |
2826 | case MSR_IA32_SYSENTER_ESP: | |
017cb99e | 2827 | svm->sysenter_esp = data; |
a2fa3e9f | 2828 | svm->vmcb->save.sysenter_esp = data; |
6aa8b732 | 2829 | break; |
a2938c80 | 2830 | case MSR_IA32_DEBUGCTLMSR: |
2a6b20b8 | 2831 | if (!boot_cpu_has(X86_FEATURE_LBRV)) { |
24e09cbf | 2832 | pr_unimpl(vcpu, "%s: MSR_IA32_DEBUGCTL 0x%llx, nop\n", |
b8688d51 | 2833 | __func__, data); |
24e09cbf JR |
2834 | break; |
2835 | } | |
2836 | if (data & DEBUGCTL_RESERVED_BITS) | |
2837 | return 1; | |
2838 | ||
2839 | svm->vmcb->save.dbgctl = data; | |
2840 | if (data & (1ULL<<0)) | |
2841 | svm_enable_lbrv(svm); | |
2842 | else | |
2843 | svm_disable_lbrv(svm); | |
a2938c80 | 2844 | break; |
b286d5d8 | 2845 | case MSR_VM_HSAVE_PA: |
e6aa9abd | 2846 | svm->nested.hsave_msr = data; |
62b9abaa | 2847 | break; |
3c5d0a44 | 2848 | case MSR_VM_CR: |
4a810181 | 2849 | return svm_set_vm_cr(vcpu, data); |
3c5d0a44 | 2850 | case MSR_VM_IGNNE: |
3c5d0a44 AG |
2851 | pr_unimpl(vcpu, "unimplemented wrmsr: 0x%x data 0x%llx\n", ecx, data); |
2852 | break; | |
6aa8b732 | 2853 | default: |
3bab1f5d | 2854 | return kvm_set_msr_common(vcpu, ecx, data); |
6aa8b732 AK |
2855 | } |
2856 | return 0; | |
2857 | } | |
2858 | ||
851ba692 | 2859 | static int wrmsr_interception(struct vcpu_svm *svm) |
6aa8b732 | 2860 | { |
ad312c7c | 2861 | u32 ecx = svm->vcpu.arch.regs[VCPU_REGS_RCX]; |
5fdbf976 | 2862 | u64 data = (svm->vcpu.arch.regs[VCPU_REGS_RAX] & -1u) |
ad312c7c | 2863 | | ((u64)(svm->vcpu.arch.regs[VCPU_REGS_RDX] & -1u) << 32); |
af9ca2d7 | 2864 | |
af9ca2d7 | 2865 | |
5fdbf976 | 2866 | svm->next_rip = kvm_rip_read(&svm->vcpu) + 2; |
59200273 AK |
2867 | if (svm_set_msr(&svm->vcpu, ecx, data)) { |
2868 | trace_kvm_msr_write_ex(ecx, data); | |
c1a5d4f9 | 2869 | kvm_inject_gp(&svm->vcpu, 0); |
59200273 AK |
2870 | } else { |
2871 | trace_kvm_msr_write(ecx, data); | |
e756fc62 | 2872 | skip_emulated_instruction(&svm->vcpu); |
59200273 | 2873 | } |
6aa8b732 AK |
2874 | return 1; |
2875 | } | |
2876 | ||
851ba692 | 2877 | static int msr_interception(struct vcpu_svm *svm) |
6aa8b732 | 2878 | { |
e756fc62 | 2879 | if (svm->vmcb->control.exit_info_1) |
851ba692 | 2880 | return wrmsr_interception(svm); |
6aa8b732 | 2881 | else |
851ba692 | 2882 | return rdmsr_interception(svm); |
6aa8b732 AK |
2883 | } |
2884 | ||
851ba692 | 2885 | static int interrupt_window_interception(struct vcpu_svm *svm) |
c1150d8c | 2886 | { |
851ba692 AK |
2887 | struct kvm_run *kvm_run = svm->vcpu.run; |
2888 | ||
3842d135 | 2889 | kvm_make_request(KVM_REQ_EVENT, &svm->vcpu); |
f0b85051 | 2890 | svm_clear_vintr(svm); |
85f455f7 | 2891 | svm->vmcb->control.int_ctl &= ~V_IRQ_MASK; |
decdbf6a | 2892 | mark_dirty(svm->vmcb, VMCB_INTR); |
c1150d8c DL |
2893 | /* |
2894 | * If the user space waits to inject interrupts, exit as soon as | |
2895 | * possible | |
2896 | */ | |
8061823a GN |
2897 | if (!irqchip_in_kernel(svm->vcpu.kvm) && |
2898 | kvm_run->request_interrupt_window && | |
2899 | !kvm_cpu_has_interrupt(&svm->vcpu)) { | |
e756fc62 | 2900 | ++svm->vcpu.stat.irq_window_exits; |
c1150d8c DL |
2901 | kvm_run->exit_reason = KVM_EXIT_IRQ_WINDOW_OPEN; |
2902 | return 0; | |
2903 | } | |
2904 | ||
2905 | return 1; | |
2906 | } | |
2907 | ||
565d0998 ML |
2908 | static int pause_interception(struct vcpu_svm *svm) |
2909 | { | |
2910 | kvm_vcpu_on_spin(&(svm->vcpu)); | |
2911 | return 1; | |
2912 | } | |
2913 | ||
851ba692 | 2914 | static int (*svm_exit_handlers[])(struct vcpu_svm *svm) = { |
e0231715 JR |
2915 | [SVM_EXIT_READ_CR0] = emulate_on_interception, |
2916 | [SVM_EXIT_READ_CR3] = emulate_on_interception, | |
2917 | [SVM_EXIT_READ_CR4] = emulate_on_interception, | |
2918 | [SVM_EXIT_READ_CR8] = emulate_on_interception, | |
d225157b | 2919 | [SVM_EXIT_CR0_SEL_WRITE] = emulate_on_interception, |
cda00082 | 2920 | [SVM_EXIT_WRITE_CR0] = cr0_write_interception, |
e0231715 JR |
2921 | [SVM_EXIT_WRITE_CR3] = emulate_on_interception, |
2922 | [SVM_EXIT_WRITE_CR4] = emulate_on_interception, | |
2923 | [SVM_EXIT_WRITE_CR8] = cr8_write_interception, | |
2924 | [SVM_EXIT_READ_DR0] = emulate_on_interception, | |
6aa8b732 AK |
2925 | [SVM_EXIT_READ_DR1] = emulate_on_interception, |
2926 | [SVM_EXIT_READ_DR2] = emulate_on_interception, | |
2927 | [SVM_EXIT_READ_DR3] = emulate_on_interception, | |
727f5a23 JK |
2928 | [SVM_EXIT_READ_DR4] = emulate_on_interception, |
2929 | [SVM_EXIT_READ_DR5] = emulate_on_interception, | |
2930 | [SVM_EXIT_READ_DR6] = emulate_on_interception, | |
2931 | [SVM_EXIT_READ_DR7] = emulate_on_interception, | |
6aa8b732 AK |
2932 | [SVM_EXIT_WRITE_DR0] = emulate_on_interception, |
2933 | [SVM_EXIT_WRITE_DR1] = emulate_on_interception, | |
2934 | [SVM_EXIT_WRITE_DR2] = emulate_on_interception, | |
2935 | [SVM_EXIT_WRITE_DR3] = emulate_on_interception, | |
727f5a23 | 2936 | [SVM_EXIT_WRITE_DR4] = emulate_on_interception, |
6aa8b732 | 2937 | [SVM_EXIT_WRITE_DR5] = emulate_on_interception, |
727f5a23 | 2938 | [SVM_EXIT_WRITE_DR6] = emulate_on_interception, |
6aa8b732 | 2939 | [SVM_EXIT_WRITE_DR7] = emulate_on_interception, |
d0bfb940 JK |
2940 | [SVM_EXIT_EXCP_BASE + DB_VECTOR] = db_interception, |
2941 | [SVM_EXIT_EXCP_BASE + BP_VECTOR] = bp_interception, | |
7aa81cc0 | 2942 | [SVM_EXIT_EXCP_BASE + UD_VECTOR] = ud_interception, |
e0231715 JR |
2943 | [SVM_EXIT_EXCP_BASE + PF_VECTOR] = pf_interception, |
2944 | [SVM_EXIT_EXCP_BASE + NM_VECTOR] = nm_interception, | |
2945 | [SVM_EXIT_EXCP_BASE + MC_VECTOR] = mc_interception, | |
2946 | [SVM_EXIT_INTR] = intr_interception, | |
c47f098d | 2947 | [SVM_EXIT_NMI] = nmi_interception, |
6aa8b732 AK |
2948 | [SVM_EXIT_SMI] = nop_on_interception, |
2949 | [SVM_EXIT_INIT] = nop_on_interception, | |
c1150d8c | 2950 | [SVM_EXIT_VINTR] = interrupt_window_interception, |
6aa8b732 | 2951 | [SVM_EXIT_CPUID] = cpuid_interception, |
95ba8273 | 2952 | [SVM_EXIT_IRET] = iret_interception, |
cf5a94d1 | 2953 | [SVM_EXIT_INVD] = emulate_on_interception, |
565d0998 | 2954 | [SVM_EXIT_PAUSE] = pause_interception, |
6aa8b732 | 2955 | [SVM_EXIT_HLT] = halt_interception, |
a7052897 | 2956 | [SVM_EXIT_INVLPG] = invlpg_interception, |
ff092385 | 2957 | [SVM_EXIT_INVLPGA] = invlpga_interception, |
e0231715 | 2958 | [SVM_EXIT_IOIO] = io_interception, |
6aa8b732 AK |
2959 | [SVM_EXIT_MSR] = msr_interception, |
2960 | [SVM_EXIT_TASK_SWITCH] = task_switch_interception, | |
46fe4ddd | 2961 | [SVM_EXIT_SHUTDOWN] = shutdown_interception, |
3d6368ef | 2962 | [SVM_EXIT_VMRUN] = vmrun_interception, |
02e235bc | 2963 | [SVM_EXIT_VMMCALL] = vmmcall_interception, |
5542675b AG |
2964 | [SVM_EXIT_VMLOAD] = vmload_interception, |
2965 | [SVM_EXIT_VMSAVE] = vmsave_interception, | |
1371d904 AG |
2966 | [SVM_EXIT_STGI] = stgi_interception, |
2967 | [SVM_EXIT_CLGI] = clgi_interception, | |
532a46b9 | 2968 | [SVM_EXIT_SKINIT] = skinit_interception, |
cf5a94d1 | 2969 | [SVM_EXIT_WBINVD] = emulate_on_interception, |
916ce236 JR |
2970 | [SVM_EXIT_MONITOR] = invalid_op_interception, |
2971 | [SVM_EXIT_MWAIT] = invalid_op_interception, | |
709ddebf | 2972 | [SVM_EXIT_NPF] = pf_interception, |
6aa8b732 AK |
2973 | }; |
2974 | ||
3f10c846 JR |
2975 | void dump_vmcb(struct kvm_vcpu *vcpu) |
2976 | { | |
2977 | struct vcpu_svm *svm = to_svm(vcpu); | |
2978 | struct vmcb_control_area *control = &svm->vmcb->control; | |
2979 | struct vmcb_save_area *save = &svm->vmcb->save; | |
2980 | ||
2981 | pr_err("VMCB Control Area:\n"); | |
4ee546b4 RJ |
2982 | pr_err("cr_read: %04x\n", control->intercept_cr & 0xffff); |
2983 | pr_err("cr_write: %04x\n", control->intercept_cr >> 16); | |
3aed041a JR |
2984 | pr_err("dr_read: %04x\n", control->intercept_dr & 0xffff); |
2985 | pr_err("dr_write: %04x\n", control->intercept_dr >> 16); | |
3f10c846 JR |
2986 | pr_err("exceptions: %08x\n", control->intercept_exceptions); |
2987 | pr_err("intercepts: %016llx\n", control->intercept); | |
2988 | pr_err("pause filter count: %d\n", control->pause_filter_count); | |
2989 | pr_err("iopm_base_pa: %016llx\n", control->iopm_base_pa); | |
2990 | pr_err("msrpm_base_pa: %016llx\n", control->msrpm_base_pa); | |
2991 | pr_err("tsc_offset: %016llx\n", control->tsc_offset); | |
2992 | pr_err("asid: %d\n", control->asid); | |
2993 | pr_err("tlb_ctl: %d\n", control->tlb_ctl); | |
2994 | pr_err("int_ctl: %08x\n", control->int_ctl); | |
2995 | pr_err("int_vector: %08x\n", control->int_vector); | |
2996 | pr_err("int_state: %08x\n", control->int_state); | |
2997 | pr_err("exit_code: %08x\n", control->exit_code); | |
2998 | pr_err("exit_info1: %016llx\n", control->exit_info_1); | |
2999 | pr_err("exit_info2: %016llx\n", control->exit_info_2); | |
3000 | pr_err("exit_int_info: %08x\n", control->exit_int_info); | |
3001 | pr_err("exit_int_info_err: %08x\n", control->exit_int_info_err); | |
3002 | pr_err("nested_ctl: %lld\n", control->nested_ctl); | |
3003 | pr_err("nested_cr3: %016llx\n", control->nested_cr3); | |
3004 | pr_err("event_inj: %08x\n", control->event_inj); | |
3005 | pr_err("event_inj_err: %08x\n", control->event_inj_err); | |
3006 | pr_err("lbr_ctl: %lld\n", control->lbr_ctl); | |
3007 | pr_err("next_rip: %016llx\n", control->next_rip); | |
3008 | pr_err("VMCB State Save Area:\n"); | |
3009 | pr_err("es: s: %04x a: %04x l: %08x b: %016llx\n", | |
3010 | save->es.selector, save->es.attrib, | |
3011 | save->es.limit, save->es.base); | |
3012 | pr_err("cs: s: %04x a: %04x l: %08x b: %016llx\n", | |
3013 | save->cs.selector, save->cs.attrib, | |
3014 | save->cs.limit, save->cs.base); | |
3015 | pr_err("ss: s: %04x a: %04x l: %08x b: %016llx\n", | |
3016 | save->ss.selector, save->ss.attrib, | |
3017 | save->ss.limit, save->ss.base); | |
3018 | pr_err("ds: s: %04x a: %04x l: %08x b: %016llx\n", | |
3019 | save->ds.selector, save->ds.attrib, | |
3020 | save->ds.limit, save->ds.base); | |
3021 | pr_err("fs: s: %04x a: %04x l: %08x b: %016llx\n", | |
3022 | save->fs.selector, save->fs.attrib, | |
3023 | save->fs.limit, save->fs.base); | |
3024 | pr_err("gs: s: %04x a: %04x l: %08x b: %016llx\n", | |
3025 | save->gs.selector, save->gs.attrib, | |
3026 | save->gs.limit, save->gs.base); | |
3027 | pr_err("gdtr: s: %04x a: %04x l: %08x b: %016llx\n", | |
3028 | save->gdtr.selector, save->gdtr.attrib, | |
3029 | save->gdtr.limit, save->gdtr.base); | |
3030 | pr_err("ldtr: s: %04x a: %04x l: %08x b: %016llx\n", | |
3031 | save->ldtr.selector, save->ldtr.attrib, | |
3032 | save->ldtr.limit, save->ldtr.base); | |
3033 | pr_err("idtr: s: %04x a: %04x l: %08x b: %016llx\n", | |
3034 | save->idtr.selector, save->idtr.attrib, | |
3035 | save->idtr.limit, save->idtr.base); | |
3036 | pr_err("tr: s: %04x a: %04x l: %08x b: %016llx\n", | |
3037 | save->tr.selector, save->tr.attrib, | |
3038 | save->tr.limit, save->tr.base); | |
3039 | pr_err("cpl: %d efer: %016llx\n", | |
3040 | save->cpl, save->efer); | |
3041 | pr_err("cr0: %016llx cr2: %016llx\n", | |
3042 | save->cr0, save->cr2); | |
3043 | pr_err("cr3: %016llx cr4: %016llx\n", | |
3044 | save->cr3, save->cr4); | |
3045 | pr_err("dr6: %016llx dr7: %016llx\n", | |
3046 | save->dr6, save->dr7); | |
3047 | pr_err("rip: %016llx rflags: %016llx\n", | |
3048 | save->rip, save->rflags); | |
3049 | pr_err("rsp: %016llx rax: %016llx\n", | |
3050 | save->rsp, save->rax); | |
3051 | pr_err("star: %016llx lstar: %016llx\n", | |
3052 | save->star, save->lstar); | |
3053 | pr_err("cstar: %016llx sfmask: %016llx\n", | |
3054 | save->cstar, save->sfmask); | |
3055 | pr_err("kernel_gs_base: %016llx sysenter_cs: %016llx\n", | |
3056 | save->kernel_gs_base, save->sysenter_cs); | |
3057 | pr_err("sysenter_esp: %016llx sysenter_eip: %016llx\n", | |
3058 | save->sysenter_esp, save->sysenter_eip); | |
3059 | pr_err("gpat: %016llx dbgctl: %016llx\n", | |
3060 | save->g_pat, save->dbgctl); | |
3061 | pr_err("br_from: %016llx br_to: %016llx\n", | |
3062 | save->br_from, save->br_to); | |
3063 | pr_err("excp_from: %016llx excp_to: %016llx\n", | |
3064 | save->last_excp_from, save->last_excp_to); | |
3065 | ||
3066 | } | |
3067 | ||
586f9607 AK |
3068 | static void svm_get_exit_info(struct kvm_vcpu *vcpu, u64 *info1, u64 *info2) |
3069 | { | |
3070 | struct vmcb_control_area *control = &to_svm(vcpu)->vmcb->control; | |
3071 | ||
3072 | *info1 = control->exit_info_1; | |
3073 | *info2 = control->exit_info_2; | |
3074 | } | |
3075 | ||
851ba692 | 3076 | static int handle_exit(struct kvm_vcpu *vcpu) |
6aa8b732 | 3077 | { |
04d2cc77 | 3078 | struct vcpu_svm *svm = to_svm(vcpu); |
851ba692 | 3079 | struct kvm_run *kvm_run = vcpu->run; |
a2fa3e9f | 3080 | u32 exit_code = svm->vmcb->control.exit_code; |
6aa8b732 | 3081 | |
aa17911e | 3082 | trace_kvm_exit(exit_code, vcpu, KVM_ISA_SVM); |
af9ca2d7 | 3083 | |
4ee546b4 | 3084 | if (!is_cr_intercept(svm, INTERCEPT_CR0_WRITE)) |
2be4fc7a JR |
3085 | vcpu->arch.cr0 = svm->vmcb->save.cr0; |
3086 | if (npt_enabled) | |
3087 | vcpu->arch.cr3 = svm->vmcb->save.cr3; | |
af9ca2d7 | 3088 | |
cd3ff653 JR |
3089 | if (unlikely(svm->nested.exit_required)) { |
3090 | nested_svm_vmexit(svm); | |
3091 | svm->nested.exit_required = false; | |
3092 | ||
3093 | return 1; | |
3094 | } | |
3095 | ||
2030753d | 3096 | if (is_guest_mode(vcpu)) { |
410e4d57 JR |
3097 | int vmexit; |
3098 | ||
d8cabddf JR |
3099 | trace_kvm_nested_vmexit(svm->vmcb->save.rip, exit_code, |
3100 | svm->vmcb->control.exit_info_1, | |
3101 | svm->vmcb->control.exit_info_2, | |
3102 | svm->vmcb->control.exit_int_info, | |
3103 | svm->vmcb->control.exit_int_info_err); | |
3104 | ||
410e4d57 JR |
3105 | vmexit = nested_svm_exit_special(svm); |
3106 | ||
3107 | if (vmexit == NESTED_EXIT_CONTINUE) | |
3108 | vmexit = nested_svm_exit_handled(svm); | |
3109 | ||
3110 | if (vmexit == NESTED_EXIT_DONE) | |
cf74a78b | 3111 | return 1; |
cf74a78b AG |
3112 | } |
3113 | ||
a5c3832d JR |
3114 | svm_complete_interrupts(svm); |
3115 | ||
04d2cc77 AK |
3116 | if (svm->vmcb->control.exit_code == SVM_EXIT_ERR) { |
3117 | kvm_run->exit_reason = KVM_EXIT_FAIL_ENTRY; | |
3118 | kvm_run->fail_entry.hardware_entry_failure_reason | |
3119 | = svm->vmcb->control.exit_code; | |
3f10c846 JR |
3120 | pr_err("KVM: FAILED VMRUN WITH VMCB:\n"); |
3121 | dump_vmcb(vcpu); | |
04d2cc77 AK |
3122 | return 0; |
3123 | } | |
3124 | ||
a2fa3e9f | 3125 | if (is_external_interrupt(svm->vmcb->control.exit_int_info) && |
709ddebf | 3126 | exit_code != SVM_EXIT_EXCP_BASE + PF_VECTOR && |
55c5e464 JR |
3127 | exit_code != SVM_EXIT_NPF && exit_code != SVM_EXIT_TASK_SWITCH && |
3128 | exit_code != SVM_EXIT_INTR && exit_code != SVM_EXIT_NMI) | |
6aa8b732 AK |
3129 | printk(KERN_ERR "%s: unexpected exit_ini_info 0x%x " |
3130 | "exit_code 0x%x\n", | |
b8688d51 | 3131 | __func__, svm->vmcb->control.exit_int_info, |
6aa8b732 AK |
3132 | exit_code); |
3133 | ||
9d8f549d | 3134 | if (exit_code >= ARRAY_SIZE(svm_exit_handlers) |
56919c5c | 3135 | || !svm_exit_handlers[exit_code]) { |
6aa8b732 | 3136 | kvm_run->exit_reason = KVM_EXIT_UNKNOWN; |
364b625b | 3137 | kvm_run->hw.hardware_exit_reason = exit_code; |
6aa8b732 AK |
3138 | return 0; |
3139 | } | |
3140 | ||
851ba692 | 3141 | return svm_exit_handlers[exit_code](svm); |
6aa8b732 AK |
3142 | } |
3143 | ||
3144 | static void reload_tss(struct kvm_vcpu *vcpu) | |
3145 | { | |
3146 | int cpu = raw_smp_processor_id(); | |
3147 | ||
0fe1e009 TH |
3148 | struct svm_cpu_data *sd = per_cpu(svm_data, cpu); |
3149 | sd->tss_desc->type = 9; /* available 32/64-bit TSS */ | |
6aa8b732 AK |
3150 | load_TR_desc(); |
3151 | } | |
3152 | ||
e756fc62 | 3153 | static void pre_svm_run(struct vcpu_svm *svm) |
6aa8b732 AK |
3154 | { |
3155 | int cpu = raw_smp_processor_id(); | |
3156 | ||
0fe1e009 | 3157 | struct svm_cpu_data *sd = per_cpu(svm_data, cpu); |
6aa8b732 | 3158 | |
a2fa3e9f | 3159 | svm->vmcb->control.tlb_ctl = TLB_CONTROL_DO_NOTHING; |
4b656b12 | 3160 | /* FIXME: handle wraparound of asid_generation */ |
0fe1e009 TH |
3161 | if (svm->asid_generation != sd->asid_generation) |
3162 | new_asid(svm, sd); | |
6aa8b732 AK |
3163 | } |
3164 | ||
95ba8273 GN |
3165 | static void svm_inject_nmi(struct kvm_vcpu *vcpu) |
3166 | { | |
3167 | struct vcpu_svm *svm = to_svm(vcpu); | |
3168 | ||
3169 | svm->vmcb->control.event_inj = SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_NMI; | |
3170 | vcpu->arch.hflags |= HF_NMI_MASK; | |
8a05a1b8 | 3171 | set_intercept(svm, INTERCEPT_IRET); |
95ba8273 GN |
3172 | ++vcpu->stat.nmi_injections; |
3173 | } | |
6aa8b732 | 3174 | |
85f455f7 | 3175 | static inline void svm_inject_irq(struct vcpu_svm *svm, int irq) |
6aa8b732 AK |
3176 | { |
3177 | struct vmcb_control_area *control; | |
3178 | ||
e756fc62 | 3179 | control = &svm->vmcb->control; |
85f455f7 | 3180 | control->int_vector = irq; |
6aa8b732 AK |
3181 | control->int_ctl &= ~V_INTR_PRIO_MASK; |
3182 | control->int_ctl |= V_IRQ_MASK | | |
3183 | ((/*control->int_vector >> 4*/ 0xf) << V_INTR_PRIO_SHIFT); | |
decdbf6a | 3184 | mark_dirty(svm->vmcb, VMCB_INTR); |
6aa8b732 AK |
3185 | } |
3186 | ||
66fd3f7f | 3187 | static void svm_set_irq(struct kvm_vcpu *vcpu) |
2a8067f1 ED |
3188 | { |
3189 | struct vcpu_svm *svm = to_svm(vcpu); | |
3190 | ||
2af9194d | 3191 | BUG_ON(!(gif_set(svm))); |
cf74a78b | 3192 | |
9fb2d2b4 GN |
3193 | trace_kvm_inj_virq(vcpu->arch.interrupt.nr); |
3194 | ++vcpu->stat.irq_injections; | |
3195 | ||
219b65dc AG |
3196 | svm->vmcb->control.event_inj = vcpu->arch.interrupt.nr | |
3197 | SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_INTR; | |
2a8067f1 ED |
3198 | } |
3199 | ||
95ba8273 | 3200 | static void update_cr8_intercept(struct kvm_vcpu *vcpu, int tpr, int irr) |
aaacfc9a JR |
3201 | { |
3202 | struct vcpu_svm *svm = to_svm(vcpu); | |
aaacfc9a | 3203 | |
2030753d | 3204 | if (is_guest_mode(vcpu) && (vcpu->arch.hflags & HF_VINTR_MASK)) |
88ab24ad JR |
3205 | return; |
3206 | ||
95ba8273 | 3207 | if (irr == -1) |
aaacfc9a JR |
3208 | return; |
3209 | ||
95ba8273 | 3210 | if (tpr >= irr) |
4ee546b4 | 3211 | set_cr_intercept(svm, INTERCEPT_CR8_WRITE); |
95ba8273 | 3212 | } |
aaacfc9a | 3213 | |
95ba8273 GN |
3214 | static int svm_nmi_allowed(struct kvm_vcpu *vcpu) |
3215 | { | |
3216 | struct vcpu_svm *svm = to_svm(vcpu); | |
3217 | struct vmcb *vmcb = svm->vmcb; | |
924584cc JR |
3218 | int ret; |
3219 | ret = !(vmcb->control.int_state & SVM_INTERRUPT_SHADOW_MASK) && | |
3220 | !(svm->vcpu.arch.hflags & HF_NMI_MASK); | |
3221 | ret = ret && gif_set(svm) && nested_svm_nmi(svm); | |
3222 | ||
3223 | return ret; | |
aaacfc9a JR |
3224 | } |
3225 | ||
3cfc3092 JK |
3226 | static bool svm_get_nmi_mask(struct kvm_vcpu *vcpu) |
3227 | { | |
3228 | struct vcpu_svm *svm = to_svm(vcpu); | |
3229 | ||
3230 | return !!(svm->vcpu.arch.hflags & HF_NMI_MASK); | |
3231 | } | |
3232 | ||
3233 | static void svm_set_nmi_mask(struct kvm_vcpu *vcpu, bool masked) | |
3234 | { | |
3235 | struct vcpu_svm *svm = to_svm(vcpu); | |
3236 | ||
3237 | if (masked) { | |
3238 | svm->vcpu.arch.hflags |= HF_NMI_MASK; | |
8a05a1b8 | 3239 | set_intercept(svm, INTERCEPT_IRET); |
3cfc3092 JK |
3240 | } else { |
3241 | svm->vcpu.arch.hflags &= ~HF_NMI_MASK; | |
8a05a1b8 | 3242 | clr_intercept(svm, INTERCEPT_IRET); |
3cfc3092 JK |
3243 | } |
3244 | } | |
3245 | ||
78646121 GN |
3246 | static int svm_interrupt_allowed(struct kvm_vcpu *vcpu) |
3247 | { | |
3248 | struct vcpu_svm *svm = to_svm(vcpu); | |
3249 | struct vmcb *vmcb = svm->vmcb; | |
7fcdb510 JR |
3250 | int ret; |
3251 | ||
3252 | if (!gif_set(svm) || | |
3253 | (vmcb->control.int_state & SVM_INTERRUPT_SHADOW_MASK)) | |
3254 | return 0; | |
3255 | ||
3256 | ret = !!(vmcb->save.rflags & X86_EFLAGS_IF); | |
3257 | ||
2030753d | 3258 | if (is_guest_mode(vcpu)) |
7fcdb510 JR |
3259 | return ret && !(svm->vcpu.arch.hflags & HF_VINTR_MASK); |
3260 | ||
3261 | return ret; | |
78646121 GN |
3262 | } |
3263 | ||
9222be18 | 3264 | static void enable_irq_window(struct kvm_vcpu *vcpu) |
6aa8b732 | 3265 | { |
219b65dc | 3266 | struct vcpu_svm *svm = to_svm(vcpu); |
219b65dc | 3267 | |
e0231715 JR |
3268 | /* |
3269 | * In case GIF=0 we can't rely on the CPU to tell us when GIF becomes | |
3270 | * 1, because that's a separate STGI/VMRUN intercept. The next time we | |
3271 | * get that intercept, this function will be called again though and | |
3272 | * we'll get the vintr intercept. | |
3273 | */ | |
8fe54654 | 3274 | if (gif_set(svm) && nested_svm_intr(svm)) { |
219b65dc AG |
3275 | svm_set_vintr(svm); |
3276 | svm_inject_irq(svm, 0x0); | |
3277 | } | |
85f455f7 ED |
3278 | } |
3279 | ||
95ba8273 | 3280 | static void enable_nmi_window(struct kvm_vcpu *vcpu) |
c1150d8c | 3281 | { |
04d2cc77 | 3282 | struct vcpu_svm *svm = to_svm(vcpu); |
c1150d8c | 3283 | |
44c11430 GN |
3284 | if ((svm->vcpu.arch.hflags & (HF_NMI_MASK | HF_IRET_MASK)) |
3285 | == HF_NMI_MASK) | |
3286 | return; /* IRET will cause a vm exit */ | |
3287 | ||
e0231715 JR |
3288 | /* |
3289 | * Something prevents NMI from been injected. Single step over possible | |
3290 | * problem (IRET or exception injection or interrupt shadow) | |
3291 | */ | |
6be7d306 | 3292 | svm->nmi_singlestep = true; |
44c11430 GN |
3293 | svm->vmcb->save.rflags |= (X86_EFLAGS_TF | X86_EFLAGS_RF); |
3294 | update_db_intercept(vcpu); | |
c1150d8c DL |
3295 | } |
3296 | ||
cbc94022 IE |
3297 | static int svm_set_tss_addr(struct kvm *kvm, unsigned int addr) |
3298 | { | |
3299 | return 0; | |
3300 | } | |
3301 | ||
d9e368d6 AK |
3302 | static void svm_flush_tlb(struct kvm_vcpu *vcpu) |
3303 | { | |
3304 | force_new_asid(vcpu); | |
3305 | } | |
3306 | ||
04d2cc77 AK |
3307 | static void svm_prepare_guest_switch(struct kvm_vcpu *vcpu) |
3308 | { | |
3309 | } | |
3310 | ||
d7bf8221 JR |
3311 | static inline void sync_cr8_to_lapic(struct kvm_vcpu *vcpu) |
3312 | { | |
3313 | struct vcpu_svm *svm = to_svm(vcpu); | |
3314 | ||
2030753d | 3315 | if (is_guest_mode(vcpu) && (vcpu->arch.hflags & HF_VINTR_MASK)) |
88ab24ad JR |
3316 | return; |
3317 | ||
4ee546b4 | 3318 | if (!is_cr_intercept(svm, INTERCEPT_CR8_WRITE)) { |
d7bf8221 | 3319 | int cr8 = svm->vmcb->control.int_ctl & V_TPR_MASK; |
615d5193 | 3320 | kvm_set_cr8(vcpu, cr8); |
d7bf8221 JR |
3321 | } |
3322 | } | |
3323 | ||
649d6864 JR |
3324 | static inline void sync_lapic_to_cr8(struct kvm_vcpu *vcpu) |
3325 | { | |
3326 | struct vcpu_svm *svm = to_svm(vcpu); | |
3327 | u64 cr8; | |
3328 | ||
2030753d | 3329 | if (is_guest_mode(vcpu) && (vcpu->arch.hflags & HF_VINTR_MASK)) |
88ab24ad JR |
3330 | return; |
3331 | ||
649d6864 JR |
3332 | cr8 = kvm_get_cr8(vcpu); |
3333 | svm->vmcb->control.int_ctl &= ~V_TPR_MASK; | |
3334 | svm->vmcb->control.int_ctl |= cr8 & V_TPR_MASK; | |
3335 | } | |
3336 | ||
9222be18 GN |
3337 | static void svm_complete_interrupts(struct vcpu_svm *svm) |
3338 | { | |
3339 | u8 vector; | |
3340 | int type; | |
3341 | u32 exitintinfo = svm->vmcb->control.exit_int_info; | |
66b7138f JK |
3342 | unsigned int3_injected = svm->int3_injected; |
3343 | ||
3344 | svm->int3_injected = 0; | |
9222be18 | 3345 | |
3842d135 | 3346 | if (svm->vcpu.arch.hflags & HF_IRET_MASK) { |
44c11430 | 3347 | svm->vcpu.arch.hflags &= ~(HF_NMI_MASK | HF_IRET_MASK); |
3842d135 AK |
3348 | kvm_make_request(KVM_REQ_EVENT, &svm->vcpu); |
3349 | } | |
44c11430 | 3350 | |
9222be18 GN |
3351 | svm->vcpu.arch.nmi_injected = false; |
3352 | kvm_clear_exception_queue(&svm->vcpu); | |
3353 | kvm_clear_interrupt_queue(&svm->vcpu); | |
3354 | ||
3355 | if (!(exitintinfo & SVM_EXITINTINFO_VALID)) | |
3356 | return; | |
3357 | ||
3842d135 AK |
3358 | kvm_make_request(KVM_REQ_EVENT, &svm->vcpu); |
3359 | ||
9222be18 GN |
3360 | vector = exitintinfo & SVM_EXITINTINFO_VEC_MASK; |
3361 | type = exitintinfo & SVM_EXITINTINFO_TYPE_MASK; | |
3362 | ||
3363 | switch (type) { | |
3364 | case SVM_EXITINTINFO_TYPE_NMI: | |
3365 | svm->vcpu.arch.nmi_injected = true; | |
3366 | break; | |
3367 | case SVM_EXITINTINFO_TYPE_EXEPT: | |
66b7138f JK |
3368 | /* |
3369 | * In case of software exceptions, do not reinject the vector, | |
3370 | * but re-execute the instruction instead. Rewind RIP first | |
3371 | * if we emulated INT3 before. | |
3372 | */ | |
3373 | if (kvm_exception_is_soft(vector)) { | |
3374 | if (vector == BP_VECTOR && int3_injected && | |
3375 | kvm_is_linear_rip(&svm->vcpu, svm->int3_rip)) | |
3376 | kvm_rip_write(&svm->vcpu, | |
3377 | kvm_rip_read(&svm->vcpu) - | |
3378 | int3_injected); | |
9222be18 | 3379 | break; |
66b7138f | 3380 | } |
9222be18 GN |
3381 | if (exitintinfo & SVM_EXITINTINFO_VALID_ERR) { |
3382 | u32 err = svm->vmcb->control.exit_int_info_err; | |
ce7ddec4 | 3383 | kvm_requeue_exception_e(&svm->vcpu, vector, err); |
9222be18 GN |
3384 | |
3385 | } else | |
ce7ddec4 | 3386 | kvm_requeue_exception(&svm->vcpu, vector); |
9222be18 GN |
3387 | break; |
3388 | case SVM_EXITINTINFO_TYPE_INTR: | |
66fd3f7f | 3389 | kvm_queue_interrupt(&svm->vcpu, vector, false); |
9222be18 GN |
3390 | break; |
3391 | default: | |
3392 | break; | |
3393 | } | |
3394 | } | |
3395 | ||
b463a6f7 AK |
3396 | static void svm_cancel_injection(struct kvm_vcpu *vcpu) |
3397 | { | |
3398 | struct vcpu_svm *svm = to_svm(vcpu); | |
3399 | struct vmcb_control_area *control = &svm->vmcb->control; | |
3400 | ||
3401 | control->exit_int_info = control->event_inj; | |
3402 | control->exit_int_info_err = control->event_inj_err; | |
3403 | control->event_inj = 0; | |
3404 | svm_complete_interrupts(svm); | |
3405 | } | |
3406 | ||
80e31d4f AK |
3407 | #ifdef CONFIG_X86_64 |
3408 | #define R "r" | |
3409 | #else | |
3410 | #define R "e" | |
3411 | #endif | |
3412 | ||
851ba692 | 3413 | static void svm_vcpu_run(struct kvm_vcpu *vcpu) |
6aa8b732 | 3414 | { |
a2fa3e9f | 3415 | struct vcpu_svm *svm = to_svm(vcpu); |
d9e368d6 | 3416 | |
2041a06a JR |
3417 | svm->vmcb->save.rax = vcpu->arch.regs[VCPU_REGS_RAX]; |
3418 | svm->vmcb->save.rsp = vcpu->arch.regs[VCPU_REGS_RSP]; | |
3419 | svm->vmcb->save.rip = vcpu->arch.regs[VCPU_REGS_RIP]; | |
3420 | ||
cd3ff653 JR |
3421 | /* |
3422 | * A vmexit emulation is required before the vcpu can be executed | |
3423 | * again. | |
3424 | */ | |
3425 | if (unlikely(svm->nested.exit_required)) | |
3426 | return; | |
3427 | ||
e756fc62 | 3428 | pre_svm_run(svm); |
6aa8b732 | 3429 | |
649d6864 JR |
3430 | sync_lapic_to_cr8(vcpu); |
3431 | ||
cda0ffdd | 3432 | svm->vmcb->save.cr2 = vcpu->arch.cr2; |
6aa8b732 | 3433 | |
04d2cc77 AK |
3434 | clgi(); |
3435 | ||
3436 | local_irq_enable(); | |
36241b8c | 3437 | |
6aa8b732 | 3438 | asm volatile ( |
80e31d4f AK |
3439 | "push %%"R"bp; \n\t" |
3440 | "mov %c[rbx](%[svm]), %%"R"bx \n\t" | |
3441 | "mov %c[rcx](%[svm]), %%"R"cx \n\t" | |
3442 | "mov %c[rdx](%[svm]), %%"R"dx \n\t" | |
3443 | "mov %c[rsi](%[svm]), %%"R"si \n\t" | |
3444 | "mov %c[rdi](%[svm]), %%"R"di \n\t" | |
3445 | "mov %c[rbp](%[svm]), %%"R"bp \n\t" | |
05b3e0c2 | 3446 | #ifdef CONFIG_X86_64 |
fb3f0f51 RR |
3447 | "mov %c[r8](%[svm]), %%r8 \n\t" |
3448 | "mov %c[r9](%[svm]), %%r9 \n\t" | |
3449 | "mov %c[r10](%[svm]), %%r10 \n\t" | |
3450 | "mov %c[r11](%[svm]), %%r11 \n\t" | |
3451 | "mov %c[r12](%[svm]), %%r12 \n\t" | |
3452 | "mov %c[r13](%[svm]), %%r13 \n\t" | |
3453 | "mov %c[r14](%[svm]), %%r14 \n\t" | |
3454 | "mov %c[r15](%[svm]), %%r15 \n\t" | |
6aa8b732 AK |
3455 | #endif |
3456 | ||
6aa8b732 | 3457 | /* Enter guest mode */ |
80e31d4f AK |
3458 | "push %%"R"ax \n\t" |
3459 | "mov %c[vmcb](%[svm]), %%"R"ax \n\t" | |
4ecac3fd AK |
3460 | __ex(SVM_VMLOAD) "\n\t" |
3461 | __ex(SVM_VMRUN) "\n\t" | |
3462 | __ex(SVM_VMSAVE) "\n\t" | |
80e31d4f | 3463 | "pop %%"R"ax \n\t" |
6aa8b732 AK |
3464 | |
3465 | /* Save guest registers, load host registers */ | |
80e31d4f AK |
3466 | "mov %%"R"bx, %c[rbx](%[svm]) \n\t" |
3467 | "mov %%"R"cx, %c[rcx](%[svm]) \n\t" | |
3468 | "mov %%"R"dx, %c[rdx](%[svm]) \n\t" | |
3469 | "mov %%"R"si, %c[rsi](%[svm]) \n\t" | |
3470 | "mov %%"R"di, %c[rdi](%[svm]) \n\t" | |
3471 | "mov %%"R"bp, %c[rbp](%[svm]) \n\t" | |
05b3e0c2 | 3472 | #ifdef CONFIG_X86_64 |
fb3f0f51 RR |
3473 | "mov %%r8, %c[r8](%[svm]) \n\t" |
3474 | "mov %%r9, %c[r9](%[svm]) \n\t" | |
3475 | "mov %%r10, %c[r10](%[svm]) \n\t" | |
3476 | "mov %%r11, %c[r11](%[svm]) \n\t" | |
3477 | "mov %%r12, %c[r12](%[svm]) \n\t" | |
3478 | "mov %%r13, %c[r13](%[svm]) \n\t" | |
3479 | "mov %%r14, %c[r14](%[svm]) \n\t" | |
3480 | "mov %%r15, %c[r15](%[svm]) \n\t" | |
6aa8b732 | 3481 | #endif |
80e31d4f | 3482 | "pop %%"R"bp" |
6aa8b732 | 3483 | : |
fb3f0f51 | 3484 | : [svm]"a"(svm), |
6aa8b732 | 3485 | [vmcb]"i"(offsetof(struct vcpu_svm, vmcb_pa)), |
ad312c7c ZX |
3486 | [rbx]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RBX])), |
3487 | [rcx]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RCX])), | |
3488 | [rdx]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RDX])), | |
3489 | [rsi]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RSI])), | |
3490 | [rdi]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RDI])), | |
3491 | [rbp]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RBP])) | |
05b3e0c2 | 3492 | #ifdef CONFIG_X86_64 |
ad312c7c ZX |
3493 | , [r8]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R8])), |
3494 | [r9]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R9])), | |
3495 | [r10]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R10])), | |
3496 | [r11]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R11])), | |
3497 | [r12]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R12])), | |
3498 | [r13]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R13])), | |
3499 | [r14]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R14])), | |
3500 | [r15]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R15])) | |
6aa8b732 | 3501 | #endif |
54a08c04 | 3502 | : "cc", "memory" |
80e31d4f | 3503 | , R"bx", R"cx", R"dx", R"si", R"di" |
54a08c04 | 3504 | #ifdef CONFIG_X86_64 |
54a08c04 LV |
3505 | , "r8", "r9", "r10", "r11" , "r12", "r13", "r14", "r15" |
3506 | #endif | |
3507 | ); | |
6aa8b732 | 3508 | |
82ca2d10 AK |
3509 | #ifdef CONFIG_X86_64 |
3510 | wrmsrl(MSR_GS_BASE, svm->host.gs_base); | |
3511 | #else | |
dacccfdd | 3512 | loadsegment(fs, svm->host.fs); |
9581d442 | 3513 | #endif |
6aa8b732 AK |
3514 | |
3515 | reload_tss(vcpu); | |
3516 | ||
56ba47dd AK |
3517 | local_irq_disable(); |
3518 | ||
3519 | stgi(); | |
3520 | ||
13c34e07 AK |
3521 | vcpu->arch.cr2 = svm->vmcb->save.cr2; |
3522 | vcpu->arch.regs[VCPU_REGS_RAX] = svm->vmcb->save.rax; | |
3523 | vcpu->arch.regs[VCPU_REGS_RSP] = svm->vmcb->save.rsp; | |
3524 | vcpu->arch.regs[VCPU_REGS_RIP] = svm->vmcb->save.rip; | |
3525 | ||
d7bf8221 JR |
3526 | sync_cr8_to_lapic(vcpu); |
3527 | ||
a2fa3e9f | 3528 | svm->next_rip = 0; |
9222be18 | 3529 | |
631bc487 GN |
3530 | /* if exit due to PF check for async PF */ |
3531 | if (svm->vmcb->control.exit_code == SVM_EXIT_EXCP_BASE + PF_VECTOR) | |
3532 | svm->apf_reason = kvm_read_and_reset_pf_reason(); | |
3533 | ||
6de4f3ad AK |
3534 | if (npt_enabled) { |
3535 | vcpu->arch.regs_avail &= ~(1 << VCPU_EXREG_PDPTR); | |
3536 | vcpu->arch.regs_dirty &= ~(1 << VCPU_EXREG_PDPTR); | |
3537 | } | |
fe5913e4 JR |
3538 | |
3539 | /* | |
3540 | * We need to handle MC intercepts here before the vcpu has a chance to | |
3541 | * change the physical cpu | |
3542 | */ | |
3543 | if (unlikely(svm->vmcb->control.exit_code == | |
3544 | SVM_EXIT_EXCP_BASE + MC_VECTOR)) | |
3545 | svm_handle_mce(svm); | |
8d28fec4 RJ |
3546 | |
3547 | mark_all_clean(svm->vmcb); | |
6aa8b732 AK |
3548 | } |
3549 | ||
80e31d4f AK |
3550 | #undef R |
3551 | ||
6aa8b732 AK |
3552 | static void svm_set_cr3(struct kvm_vcpu *vcpu, unsigned long root) |
3553 | { | |
a2fa3e9f GH |
3554 | struct vcpu_svm *svm = to_svm(vcpu); |
3555 | ||
3556 | svm->vmcb->save.cr3 = root; | |
dcca1a65 | 3557 | mark_dirty(svm->vmcb, VMCB_CR); |
6aa8b732 AK |
3558 | force_new_asid(vcpu); |
3559 | } | |
3560 | ||
1c97f0a0 JR |
3561 | static void set_tdp_cr3(struct kvm_vcpu *vcpu, unsigned long root) |
3562 | { | |
3563 | struct vcpu_svm *svm = to_svm(vcpu); | |
3564 | ||
3565 | svm->vmcb->control.nested_cr3 = root; | |
b2747166 | 3566 | mark_dirty(svm->vmcb, VMCB_NPT); |
1c97f0a0 JR |
3567 | |
3568 | /* Also sync guest cr3 here in case we live migrate */ | |
3569 | svm->vmcb->save.cr3 = vcpu->arch.cr3; | |
dcca1a65 | 3570 | mark_dirty(svm->vmcb, VMCB_CR); |
1c97f0a0 JR |
3571 | |
3572 | force_new_asid(vcpu); | |
3573 | } | |
3574 | ||
6aa8b732 AK |
3575 | static int is_disabled(void) |
3576 | { | |
6031a61c JR |
3577 | u64 vm_cr; |
3578 | ||
3579 | rdmsrl(MSR_VM_CR, vm_cr); | |
3580 | if (vm_cr & (1 << SVM_VM_CR_SVM_DISABLE)) | |
3581 | return 1; | |
3582 | ||
6aa8b732 AK |
3583 | return 0; |
3584 | } | |
3585 | ||
102d8325 IM |
3586 | static void |
3587 | svm_patch_hypercall(struct kvm_vcpu *vcpu, unsigned char *hypercall) | |
3588 | { | |
3589 | /* | |
3590 | * Patch in the VMMCALL instruction: | |
3591 | */ | |
3592 | hypercall[0] = 0x0f; | |
3593 | hypercall[1] = 0x01; | |
3594 | hypercall[2] = 0xd9; | |
102d8325 IM |
3595 | } |
3596 | ||
002c7f7c YS |
3597 | static void svm_check_processor_compat(void *rtn) |
3598 | { | |
3599 | *(int *)rtn = 0; | |
3600 | } | |
3601 | ||
774ead3a AK |
3602 | static bool svm_cpu_has_accelerated_tpr(void) |
3603 | { | |
3604 | return false; | |
3605 | } | |
3606 | ||
4b12f0de | 3607 | static u64 svm_get_mt_mask(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio) |
64d4d521 SY |
3608 | { |
3609 | return 0; | |
3610 | } | |
3611 | ||
0e851880 SY |
3612 | static void svm_cpuid_update(struct kvm_vcpu *vcpu) |
3613 | { | |
3614 | } | |
3615 | ||
d4330ef2 JR |
3616 | static void svm_set_supported_cpuid(u32 func, struct kvm_cpuid_entry2 *entry) |
3617 | { | |
c2c63a49 | 3618 | switch (func) { |
24d1b15f JR |
3619 | case 0x00000001: |
3620 | /* Mask out xsave bit as long as it is not supported by SVM */ | |
3621 | entry->ecx &= ~(bit(X86_FEATURE_XSAVE)); | |
3622 | break; | |
4c62a2dc JR |
3623 | case 0x80000001: |
3624 | if (nested) | |
3625 | entry->ecx |= (1 << 2); /* Set SVM bit */ | |
3626 | break; | |
c2c63a49 JR |
3627 | case 0x8000000A: |
3628 | entry->eax = 1; /* SVM revision 1 */ | |
3629 | entry->ebx = 8; /* Lets support 8 ASIDs in case we add proper | |
3630 | ASID emulation to nested SVM */ | |
3631 | entry->ecx = 0; /* Reserved */ | |
7a190667 JR |
3632 | entry->edx = 0; /* Per default do not support any |
3633 | additional features */ | |
3634 | ||
3635 | /* Support next_rip if host supports it */ | |
2a6b20b8 | 3636 | if (boot_cpu_has(X86_FEATURE_NRIPS)) |
7a190667 | 3637 | entry->edx |= SVM_FEATURE_NRIP; |
c2c63a49 | 3638 | |
3d4aeaad JR |
3639 | /* Support NPT for the guest if enabled */ |
3640 | if (npt_enabled) | |
3641 | entry->edx |= SVM_FEATURE_NPT; | |
3642 | ||
c2c63a49 JR |
3643 | break; |
3644 | } | |
d4330ef2 JR |
3645 | } |
3646 | ||
229456fc | 3647 | static const struct trace_print_flags svm_exit_reasons_str[] = { |
e0231715 JR |
3648 | { SVM_EXIT_READ_CR0, "read_cr0" }, |
3649 | { SVM_EXIT_READ_CR3, "read_cr3" }, | |
3650 | { SVM_EXIT_READ_CR4, "read_cr4" }, | |
3651 | { SVM_EXIT_READ_CR8, "read_cr8" }, | |
3652 | { SVM_EXIT_WRITE_CR0, "write_cr0" }, | |
3653 | { SVM_EXIT_WRITE_CR3, "write_cr3" }, | |
3654 | { SVM_EXIT_WRITE_CR4, "write_cr4" }, | |
3655 | { SVM_EXIT_WRITE_CR8, "write_cr8" }, | |
3656 | { SVM_EXIT_READ_DR0, "read_dr0" }, | |
3657 | { SVM_EXIT_READ_DR1, "read_dr1" }, | |
3658 | { SVM_EXIT_READ_DR2, "read_dr2" }, | |
3659 | { SVM_EXIT_READ_DR3, "read_dr3" }, | |
3660 | { SVM_EXIT_WRITE_DR0, "write_dr0" }, | |
3661 | { SVM_EXIT_WRITE_DR1, "write_dr1" }, | |
3662 | { SVM_EXIT_WRITE_DR2, "write_dr2" }, | |
3663 | { SVM_EXIT_WRITE_DR3, "write_dr3" }, | |
3664 | { SVM_EXIT_WRITE_DR5, "write_dr5" }, | |
3665 | { SVM_EXIT_WRITE_DR7, "write_dr7" }, | |
229456fc MT |
3666 | { SVM_EXIT_EXCP_BASE + DB_VECTOR, "DB excp" }, |
3667 | { SVM_EXIT_EXCP_BASE + BP_VECTOR, "BP excp" }, | |
3668 | { SVM_EXIT_EXCP_BASE + UD_VECTOR, "UD excp" }, | |
3669 | { SVM_EXIT_EXCP_BASE + PF_VECTOR, "PF excp" }, | |
3670 | { SVM_EXIT_EXCP_BASE + NM_VECTOR, "NM excp" }, | |
3671 | { SVM_EXIT_EXCP_BASE + MC_VECTOR, "MC excp" }, | |
3672 | { SVM_EXIT_INTR, "interrupt" }, | |
3673 | { SVM_EXIT_NMI, "nmi" }, | |
3674 | { SVM_EXIT_SMI, "smi" }, | |
3675 | { SVM_EXIT_INIT, "init" }, | |
3676 | { SVM_EXIT_VINTR, "vintr" }, | |
3677 | { SVM_EXIT_CPUID, "cpuid" }, | |
3678 | { SVM_EXIT_INVD, "invd" }, | |
3679 | { SVM_EXIT_HLT, "hlt" }, | |
3680 | { SVM_EXIT_INVLPG, "invlpg" }, | |
3681 | { SVM_EXIT_INVLPGA, "invlpga" }, | |
3682 | { SVM_EXIT_IOIO, "io" }, | |
3683 | { SVM_EXIT_MSR, "msr" }, | |
3684 | { SVM_EXIT_TASK_SWITCH, "task_switch" }, | |
3685 | { SVM_EXIT_SHUTDOWN, "shutdown" }, | |
3686 | { SVM_EXIT_VMRUN, "vmrun" }, | |
3687 | { SVM_EXIT_VMMCALL, "hypercall" }, | |
3688 | { SVM_EXIT_VMLOAD, "vmload" }, | |
3689 | { SVM_EXIT_VMSAVE, "vmsave" }, | |
3690 | { SVM_EXIT_STGI, "stgi" }, | |
3691 | { SVM_EXIT_CLGI, "clgi" }, | |
3692 | { SVM_EXIT_SKINIT, "skinit" }, | |
3693 | { SVM_EXIT_WBINVD, "wbinvd" }, | |
3694 | { SVM_EXIT_MONITOR, "monitor" }, | |
3695 | { SVM_EXIT_MWAIT, "mwait" }, | |
3696 | { SVM_EXIT_NPF, "npf" }, | |
3697 | { -1, NULL } | |
3698 | }; | |
3699 | ||
17cc3935 | 3700 | static int svm_get_lpage_level(void) |
344f414f | 3701 | { |
17cc3935 | 3702 | return PT_PDPE_LEVEL; |
344f414f JR |
3703 | } |
3704 | ||
4e47c7a6 SY |
3705 | static bool svm_rdtscp_supported(void) |
3706 | { | |
3707 | return false; | |
3708 | } | |
3709 | ||
f5f48ee1 SY |
3710 | static bool svm_has_wbinvd_exit(void) |
3711 | { | |
3712 | return true; | |
3713 | } | |
3714 | ||
02daab21 AK |
3715 | static void svm_fpu_deactivate(struct kvm_vcpu *vcpu) |
3716 | { | |
3717 | struct vcpu_svm *svm = to_svm(vcpu); | |
3718 | ||
18c918c5 | 3719 | set_exception_intercept(svm, NM_VECTOR); |
66a562f7 | 3720 | update_cr0_intercept(svm); |
02daab21 AK |
3721 | } |
3722 | ||
cbdd1bea | 3723 | static struct kvm_x86_ops svm_x86_ops = { |
6aa8b732 AK |
3724 | .cpu_has_kvm_support = has_svm, |
3725 | .disabled_by_bios = is_disabled, | |
3726 | .hardware_setup = svm_hardware_setup, | |
3727 | .hardware_unsetup = svm_hardware_unsetup, | |
002c7f7c | 3728 | .check_processor_compatibility = svm_check_processor_compat, |
6aa8b732 AK |
3729 | .hardware_enable = svm_hardware_enable, |
3730 | .hardware_disable = svm_hardware_disable, | |
774ead3a | 3731 | .cpu_has_accelerated_tpr = svm_cpu_has_accelerated_tpr, |
6aa8b732 AK |
3732 | |
3733 | .vcpu_create = svm_create_vcpu, | |
3734 | .vcpu_free = svm_free_vcpu, | |
04d2cc77 | 3735 | .vcpu_reset = svm_vcpu_reset, |
6aa8b732 | 3736 | |
04d2cc77 | 3737 | .prepare_guest_switch = svm_prepare_guest_switch, |
6aa8b732 AK |
3738 | .vcpu_load = svm_vcpu_load, |
3739 | .vcpu_put = svm_vcpu_put, | |
3740 | ||
3741 | .set_guest_debug = svm_guest_debug, | |
3742 | .get_msr = svm_get_msr, | |
3743 | .set_msr = svm_set_msr, | |
3744 | .get_segment_base = svm_get_segment_base, | |
3745 | .get_segment = svm_get_segment, | |
3746 | .set_segment = svm_set_segment, | |
2e4d2653 | 3747 | .get_cpl = svm_get_cpl, |
1747fb71 | 3748 | .get_cs_db_l_bits = kvm_get_cs_db_l_bits, |
e8467fda | 3749 | .decache_cr0_guest_bits = svm_decache_cr0_guest_bits, |
25c4c276 | 3750 | .decache_cr4_guest_bits = svm_decache_cr4_guest_bits, |
6aa8b732 | 3751 | .set_cr0 = svm_set_cr0, |
6aa8b732 AK |
3752 | .set_cr3 = svm_set_cr3, |
3753 | .set_cr4 = svm_set_cr4, | |
3754 | .set_efer = svm_set_efer, | |
3755 | .get_idt = svm_get_idt, | |
3756 | .set_idt = svm_set_idt, | |
3757 | .get_gdt = svm_get_gdt, | |
3758 | .set_gdt = svm_set_gdt, | |
020df079 | 3759 | .set_dr7 = svm_set_dr7, |
6de4f3ad | 3760 | .cache_reg = svm_cache_reg, |
6aa8b732 AK |
3761 | .get_rflags = svm_get_rflags, |
3762 | .set_rflags = svm_set_rflags, | |
6b52d186 | 3763 | .fpu_activate = svm_fpu_activate, |
02daab21 | 3764 | .fpu_deactivate = svm_fpu_deactivate, |
6aa8b732 | 3765 | |
6aa8b732 | 3766 | .tlb_flush = svm_flush_tlb, |
6aa8b732 | 3767 | |
6aa8b732 | 3768 | .run = svm_vcpu_run, |
04d2cc77 | 3769 | .handle_exit = handle_exit, |
6aa8b732 | 3770 | .skip_emulated_instruction = skip_emulated_instruction, |
2809f5d2 GC |
3771 | .set_interrupt_shadow = svm_set_interrupt_shadow, |
3772 | .get_interrupt_shadow = svm_get_interrupt_shadow, | |
102d8325 | 3773 | .patch_hypercall = svm_patch_hypercall, |
2a8067f1 | 3774 | .set_irq = svm_set_irq, |
95ba8273 | 3775 | .set_nmi = svm_inject_nmi, |
298101da | 3776 | .queue_exception = svm_queue_exception, |
b463a6f7 | 3777 | .cancel_injection = svm_cancel_injection, |
78646121 | 3778 | .interrupt_allowed = svm_interrupt_allowed, |
95ba8273 | 3779 | .nmi_allowed = svm_nmi_allowed, |
3cfc3092 JK |
3780 | .get_nmi_mask = svm_get_nmi_mask, |
3781 | .set_nmi_mask = svm_set_nmi_mask, | |
95ba8273 GN |
3782 | .enable_nmi_window = enable_nmi_window, |
3783 | .enable_irq_window = enable_irq_window, | |
3784 | .update_cr8_intercept = update_cr8_intercept, | |
cbc94022 IE |
3785 | |
3786 | .set_tss_addr = svm_set_tss_addr, | |
67253af5 | 3787 | .get_tdp_level = get_npt_level, |
4b12f0de | 3788 | .get_mt_mask = svm_get_mt_mask, |
229456fc | 3789 | |
586f9607 | 3790 | .get_exit_info = svm_get_exit_info, |
229456fc | 3791 | .exit_reasons_str = svm_exit_reasons_str, |
586f9607 | 3792 | |
17cc3935 | 3793 | .get_lpage_level = svm_get_lpage_level, |
0e851880 SY |
3794 | |
3795 | .cpuid_update = svm_cpuid_update, | |
4e47c7a6 SY |
3796 | |
3797 | .rdtscp_supported = svm_rdtscp_supported, | |
d4330ef2 JR |
3798 | |
3799 | .set_supported_cpuid = svm_set_supported_cpuid, | |
f5f48ee1 SY |
3800 | |
3801 | .has_wbinvd_exit = svm_has_wbinvd_exit, | |
99e3e30a ZA |
3802 | |
3803 | .write_tsc_offset = svm_write_tsc_offset, | |
e48672fa | 3804 | .adjust_tsc_offset = svm_adjust_tsc_offset, |
1c97f0a0 JR |
3805 | |
3806 | .set_tdp_cr3 = set_tdp_cr3, | |
6aa8b732 AK |
3807 | }; |
3808 | ||
3809 | static int __init svm_init(void) | |
3810 | { | |
cb498ea2 | 3811 | return kvm_init(&svm_x86_ops, sizeof(struct vcpu_svm), |
0ee75bea | 3812 | __alignof__(struct vcpu_svm), THIS_MODULE); |
6aa8b732 AK |
3813 | } |
3814 | ||
3815 | static void __exit svm_exit(void) | |
3816 | { | |
cb498ea2 | 3817 | kvm_exit(); |
6aa8b732 AK |
3818 | } |
3819 | ||
3820 | module_init(svm_init) | |
3821 | module_exit(svm_exit) |