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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. | |
7 | * | |
8 | * Authors: | |
9 | * Yaniv Kamay <yaniv@qumranet.com> | |
10 | * Avi Kivity <avi@qumranet.com> | |
11 | * | |
12 | * This work is licensed under the terms of the GNU GPL, version 2. See | |
13 | * the COPYING file in the top-level directory. | |
14 | * | |
15 | */ | |
edf88417 AK |
16 | #include <linux/kvm_host.h> |
17 | ||
85f455f7 | 18 | #include "irq.h" |
1d737c8a | 19 | #include "mmu.h" |
5fdbf976 | 20 | #include "kvm_cache_regs.h" |
fe4c7b19 | 21 | #include "x86.h" |
e495606d | 22 | |
6aa8b732 | 23 | #include <linux/module.h> |
9d8f549d | 24 | #include <linux/kernel.h> |
6aa8b732 AK |
25 | #include <linux/vmalloc.h> |
26 | #include <linux/highmem.h> | |
e8edc6e0 | 27 | #include <linux/sched.h> |
229456fc | 28 | #include <linux/ftrace_event.h> |
6aa8b732 | 29 | |
e495606d | 30 | #include <asm/desc.h> |
6aa8b732 | 31 | |
63d1142f | 32 | #include <asm/virtext.h> |
229456fc | 33 | #include "trace.h" |
63d1142f | 34 | |
4ecac3fd AK |
35 | #define __ex(x) __kvm_handle_fault_on_reboot(x) |
36 | ||
6aa8b732 AK |
37 | MODULE_AUTHOR("Qumranet"); |
38 | MODULE_LICENSE("GPL"); | |
39 | ||
40 | #define IOPM_ALLOC_ORDER 2 | |
41 | #define MSRPM_ALLOC_ORDER 1 | |
42 | ||
6aa8b732 AK |
43 | #define SEG_TYPE_LDT 2 |
44 | #define SEG_TYPE_BUSY_TSS16 3 | |
45 | ||
80b7706e JR |
46 | #define SVM_FEATURE_NPT (1 << 0) |
47 | #define SVM_FEATURE_LBRV (1 << 1) | |
94c935a1 | 48 | #define SVM_FEATURE_SVML (1 << 2) |
565d0998 | 49 | #define SVM_FEATURE_PAUSE_FILTER (1 << 10) |
80b7706e | 50 | |
410e4d57 JR |
51 | #define NESTED_EXIT_HOST 0 /* Exit handled on host level */ |
52 | #define NESTED_EXIT_DONE 1 /* Exit caused nested vmexit */ | |
53 | #define NESTED_EXIT_CONTINUE 2 /* Further checks needed */ | |
54 | ||
24e09cbf JR |
55 | #define DEBUGCTL_RESERVED_BITS (~(0x3fULL)) |
56 | ||
6c8166a7 AK |
57 | static const u32 host_save_user_msrs[] = { |
58 | #ifdef CONFIG_X86_64 | |
59 | MSR_STAR, MSR_LSTAR, MSR_CSTAR, MSR_SYSCALL_MASK, MSR_KERNEL_GS_BASE, | |
60 | MSR_FS_BASE, | |
61 | #endif | |
62 | MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP, | |
63 | }; | |
64 | ||
65 | #define NR_HOST_SAVE_USER_MSRS ARRAY_SIZE(host_save_user_msrs) | |
66 | ||
67 | struct kvm_vcpu; | |
68 | ||
e6aa9abd JR |
69 | struct nested_state { |
70 | struct vmcb *hsave; | |
71 | u64 hsave_msr; | |
72 | u64 vmcb; | |
73 | ||
74 | /* These are the merged vectors */ | |
75 | u32 *msrpm; | |
76 | ||
77 | /* gpa pointers to the real vectors */ | |
78 | u64 vmcb_msrpm; | |
aad42c64 | 79 | |
cd3ff653 JR |
80 | /* A VMEXIT is required but not yet emulated */ |
81 | bool exit_required; | |
82 | ||
aad42c64 JR |
83 | /* cache for intercepts of the guest */ |
84 | u16 intercept_cr_read; | |
85 | u16 intercept_cr_write; | |
86 | u16 intercept_dr_read; | |
87 | u16 intercept_dr_write; | |
88 | u32 intercept_exceptions; | |
89 | u64 intercept; | |
90 | ||
e6aa9abd JR |
91 | }; |
92 | ||
6c8166a7 AK |
93 | struct vcpu_svm { |
94 | struct kvm_vcpu vcpu; | |
95 | struct vmcb *vmcb; | |
96 | unsigned long vmcb_pa; | |
97 | struct svm_cpu_data *svm_data; | |
98 | uint64_t asid_generation; | |
99 | uint64_t sysenter_esp; | |
100 | uint64_t sysenter_eip; | |
101 | ||
102 | u64 next_rip; | |
103 | ||
104 | u64 host_user_msrs[NR_HOST_SAVE_USER_MSRS]; | |
105 | u64 host_gs_base; | |
6c8166a7 AK |
106 | |
107 | u32 *msrpm; | |
6c8166a7 | 108 | |
e6aa9abd | 109 | struct nested_state nested; |
6be7d306 JK |
110 | |
111 | bool nmi_singlestep; | |
6c8166a7 AK |
112 | }; |
113 | ||
709ddebf JR |
114 | /* enable NPT for AMD64 and X86 with PAE */ |
115 | #if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE) | |
116 | static bool npt_enabled = true; | |
117 | #else | |
e3da3acd | 118 | static bool npt_enabled = false; |
709ddebf | 119 | #endif |
6c7dac72 JR |
120 | static int npt = 1; |
121 | ||
122 | module_param(npt, int, S_IRUGO); | |
e3da3acd | 123 | |
4b6e4dca | 124 | static int nested = 1; |
236de055 AG |
125 | module_param(nested, int, S_IRUGO); |
126 | ||
44874f84 | 127 | static void svm_flush_tlb(struct kvm_vcpu *vcpu); |
a5c3832d | 128 | static void svm_complete_interrupts(struct vcpu_svm *svm); |
04d2cc77 | 129 | |
410e4d57 | 130 | static int nested_svm_exit_handled(struct vcpu_svm *svm); |
cf74a78b | 131 | static int nested_svm_vmexit(struct vcpu_svm *svm); |
cf74a78b AG |
132 | static int nested_svm_check_exception(struct vcpu_svm *svm, unsigned nr, |
133 | bool has_error_code, u32 error_code); | |
134 | ||
a2fa3e9f GH |
135 | static inline struct vcpu_svm *to_svm(struct kvm_vcpu *vcpu) |
136 | { | |
fb3f0f51 | 137 | return container_of(vcpu, struct vcpu_svm, vcpu); |
a2fa3e9f GH |
138 | } |
139 | ||
3d6368ef AG |
140 | static inline bool is_nested(struct vcpu_svm *svm) |
141 | { | |
e6aa9abd | 142 | return svm->nested.vmcb; |
3d6368ef AG |
143 | } |
144 | ||
2af9194d JR |
145 | static inline void enable_gif(struct vcpu_svm *svm) |
146 | { | |
147 | svm->vcpu.arch.hflags |= HF_GIF_MASK; | |
148 | } | |
149 | ||
150 | static inline void disable_gif(struct vcpu_svm *svm) | |
151 | { | |
152 | svm->vcpu.arch.hflags &= ~HF_GIF_MASK; | |
153 | } | |
154 | ||
155 | static inline bool gif_set(struct vcpu_svm *svm) | |
156 | { | |
157 | return !!(svm->vcpu.arch.hflags & HF_GIF_MASK); | |
158 | } | |
159 | ||
4866d5e3 | 160 | static unsigned long iopm_base; |
6aa8b732 AK |
161 | |
162 | struct kvm_ldttss_desc { | |
163 | u16 limit0; | |
164 | u16 base0; | |
165 | unsigned base1 : 8, type : 5, dpl : 2, p : 1; | |
166 | unsigned limit1 : 4, zero0 : 3, g : 1, base2 : 8; | |
167 | u32 base3; | |
168 | u32 zero1; | |
169 | } __attribute__((packed)); | |
170 | ||
171 | struct svm_cpu_data { | |
172 | int cpu; | |
173 | ||
5008fdf5 AK |
174 | u64 asid_generation; |
175 | u32 max_asid; | |
176 | u32 next_asid; | |
6aa8b732 AK |
177 | struct kvm_ldttss_desc *tss_desc; |
178 | ||
179 | struct page *save_area; | |
180 | }; | |
181 | ||
182 | static DEFINE_PER_CPU(struct svm_cpu_data *, svm_data); | |
80b7706e | 183 | static uint32_t svm_features; |
6aa8b732 AK |
184 | |
185 | struct svm_init_data { | |
186 | int cpu; | |
187 | int r; | |
188 | }; | |
189 | ||
190 | static u32 msrpm_ranges[] = {0, 0xc0000000, 0xc0010000}; | |
191 | ||
9d8f549d | 192 | #define NUM_MSR_MAPS ARRAY_SIZE(msrpm_ranges) |
6aa8b732 AK |
193 | #define MSRS_RANGE_SIZE 2048 |
194 | #define MSRS_IN_RANGE (MSRS_RANGE_SIZE * 8 / 2) | |
195 | ||
196 | #define MAX_INST_SIZE 15 | |
197 | ||
80b7706e JR |
198 | static inline u32 svm_has(u32 feat) |
199 | { | |
200 | return svm_features & feat; | |
201 | } | |
202 | ||
6aa8b732 AK |
203 | static inline void clgi(void) |
204 | { | |
4ecac3fd | 205 | asm volatile (__ex(SVM_CLGI)); |
6aa8b732 AK |
206 | } |
207 | ||
208 | static inline void stgi(void) | |
209 | { | |
4ecac3fd | 210 | asm volatile (__ex(SVM_STGI)); |
6aa8b732 AK |
211 | } |
212 | ||
213 | static inline void invlpga(unsigned long addr, u32 asid) | |
214 | { | |
4ecac3fd | 215 | asm volatile (__ex(SVM_INVLPGA) :: "a"(addr), "c"(asid)); |
6aa8b732 AK |
216 | } |
217 | ||
6aa8b732 AK |
218 | static inline void force_new_asid(struct kvm_vcpu *vcpu) |
219 | { | |
a2fa3e9f | 220 | to_svm(vcpu)->asid_generation--; |
6aa8b732 AK |
221 | } |
222 | ||
223 | static inline void flush_guest_tlb(struct kvm_vcpu *vcpu) | |
224 | { | |
225 | force_new_asid(vcpu); | |
226 | } | |
227 | ||
228 | static void svm_set_efer(struct kvm_vcpu *vcpu, u64 efer) | |
229 | { | |
709ddebf | 230 | if (!npt_enabled && !(efer & EFER_LMA)) |
2b5203ee | 231 | efer &= ~EFER_LME; |
6aa8b732 | 232 | |
9962d032 | 233 | to_svm(vcpu)->vmcb->save.efer = efer | EFER_SVME; |
ad312c7c | 234 | vcpu->arch.shadow_efer = efer; |
6aa8b732 AK |
235 | } |
236 | ||
298101da AK |
237 | static void svm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr, |
238 | bool has_error_code, u32 error_code) | |
239 | { | |
240 | struct vcpu_svm *svm = to_svm(vcpu); | |
241 | ||
cf74a78b AG |
242 | /* If we are within a nested VM we'd better #VMEXIT and let the |
243 | guest handle the exception */ | |
244 | if (nested_svm_check_exception(svm, nr, has_error_code, error_code)) | |
245 | return; | |
246 | ||
298101da AK |
247 | svm->vmcb->control.event_inj = nr |
248 | | SVM_EVTINJ_VALID | |
249 | | (has_error_code ? SVM_EVTINJ_VALID_ERR : 0) | |
250 | | SVM_EVTINJ_TYPE_EXEPT; | |
251 | svm->vmcb->control.event_inj_err = error_code; | |
252 | } | |
253 | ||
6aa8b732 AK |
254 | static int is_external_interrupt(u32 info) |
255 | { | |
256 | info &= SVM_EVTINJ_TYPE_MASK | SVM_EVTINJ_VALID; | |
257 | return info == (SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_INTR); | |
258 | } | |
259 | ||
2809f5d2 GC |
260 | static u32 svm_get_interrupt_shadow(struct kvm_vcpu *vcpu, int mask) |
261 | { | |
262 | struct vcpu_svm *svm = to_svm(vcpu); | |
263 | u32 ret = 0; | |
264 | ||
265 | if (svm->vmcb->control.int_state & SVM_INTERRUPT_SHADOW_MASK) | |
266 | ret |= X86_SHADOW_INT_STI | X86_SHADOW_INT_MOV_SS; | |
267 | return ret & mask; | |
268 | } | |
269 | ||
270 | static void svm_set_interrupt_shadow(struct kvm_vcpu *vcpu, int mask) | |
271 | { | |
272 | struct vcpu_svm *svm = to_svm(vcpu); | |
273 | ||
274 | if (mask == 0) | |
275 | svm->vmcb->control.int_state &= ~SVM_INTERRUPT_SHADOW_MASK; | |
276 | else | |
277 | svm->vmcb->control.int_state |= SVM_INTERRUPT_SHADOW_MASK; | |
278 | ||
279 | } | |
280 | ||
6aa8b732 AK |
281 | static void skip_emulated_instruction(struct kvm_vcpu *vcpu) |
282 | { | |
a2fa3e9f GH |
283 | struct vcpu_svm *svm = to_svm(vcpu); |
284 | ||
285 | if (!svm->next_rip) { | |
851ba692 | 286 | if (emulate_instruction(vcpu, 0, 0, EMULTYPE_SKIP) != |
f629cf84 GN |
287 | EMULATE_DONE) |
288 | printk(KERN_DEBUG "%s: NOP\n", __func__); | |
6aa8b732 AK |
289 | return; |
290 | } | |
5fdbf976 MT |
291 | if (svm->next_rip - kvm_rip_read(vcpu) > MAX_INST_SIZE) |
292 | printk(KERN_ERR "%s: ip 0x%lx next 0x%llx\n", | |
293 | __func__, kvm_rip_read(vcpu), svm->next_rip); | |
6aa8b732 | 294 | |
5fdbf976 | 295 | kvm_rip_write(vcpu, svm->next_rip); |
2809f5d2 | 296 | svm_set_interrupt_shadow(vcpu, 0); |
6aa8b732 AK |
297 | } |
298 | ||
299 | static int has_svm(void) | |
300 | { | |
63d1142f | 301 | const char *msg; |
6aa8b732 | 302 | |
63d1142f | 303 | if (!cpu_has_svm(&msg)) { |
ff81ff10 | 304 | printk(KERN_INFO "has_svm: %s\n", msg); |
6aa8b732 AK |
305 | return 0; |
306 | } | |
307 | ||
6aa8b732 AK |
308 | return 1; |
309 | } | |
310 | ||
311 | static void svm_hardware_disable(void *garbage) | |
312 | { | |
2c8dceeb | 313 | cpu_svm_disable(); |
6aa8b732 AK |
314 | } |
315 | ||
10474ae8 | 316 | static int svm_hardware_enable(void *garbage) |
6aa8b732 AK |
317 | { |
318 | ||
0fe1e009 | 319 | struct svm_cpu_data *sd; |
6aa8b732 | 320 | uint64_t efer; |
b792c344 | 321 | struct descriptor_table gdt_descr; |
6aa8b732 AK |
322 | struct desc_struct *gdt; |
323 | int me = raw_smp_processor_id(); | |
324 | ||
10474ae8 AG |
325 | rdmsrl(MSR_EFER, efer); |
326 | if (efer & EFER_SVME) | |
327 | return -EBUSY; | |
328 | ||
6aa8b732 | 329 | if (!has_svm()) { |
e6732a5a ZA |
330 | printk(KERN_ERR "svm_hardware_enable: err EOPNOTSUPP on %d\n", |
331 | me); | |
10474ae8 | 332 | return -EINVAL; |
6aa8b732 | 333 | } |
0fe1e009 | 334 | sd = per_cpu(svm_data, me); |
6aa8b732 | 335 | |
0fe1e009 | 336 | if (!sd) { |
e6732a5a | 337 | printk(KERN_ERR "svm_hardware_enable: svm_data is NULL on %d\n", |
6aa8b732 | 338 | me); |
10474ae8 | 339 | return -EINVAL; |
6aa8b732 AK |
340 | } |
341 | ||
0fe1e009 TH |
342 | sd->asid_generation = 1; |
343 | sd->max_asid = cpuid_ebx(SVM_CPUID_FUNC) - 1; | |
344 | sd->next_asid = sd->max_asid + 1; | |
6aa8b732 | 345 | |
b792c344 AM |
346 | kvm_get_gdt(&gdt_descr); |
347 | gdt = (struct desc_struct *)gdt_descr.base; | |
0fe1e009 | 348 | sd->tss_desc = (struct kvm_ldttss_desc *)(gdt + GDT_ENTRY_TSS); |
6aa8b732 | 349 | |
9962d032 | 350 | wrmsrl(MSR_EFER, efer | EFER_SVME); |
6aa8b732 | 351 | |
d0316554 | 352 | wrmsrl(MSR_VM_HSAVE_PA, page_to_pfn(sd->save_area) << PAGE_SHIFT); |
10474ae8 AG |
353 | |
354 | return 0; | |
6aa8b732 AK |
355 | } |
356 | ||
0da1db75 JR |
357 | static void svm_cpu_uninit(int cpu) |
358 | { | |
0fe1e009 | 359 | struct svm_cpu_data *sd = per_cpu(svm_data, raw_smp_processor_id()); |
0da1db75 | 360 | |
0fe1e009 | 361 | if (!sd) |
0da1db75 JR |
362 | return; |
363 | ||
364 | per_cpu(svm_data, raw_smp_processor_id()) = NULL; | |
0fe1e009 TH |
365 | __free_page(sd->save_area); |
366 | kfree(sd); | |
0da1db75 JR |
367 | } |
368 | ||
6aa8b732 AK |
369 | static int svm_cpu_init(int cpu) |
370 | { | |
0fe1e009 | 371 | struct svm_cpu_data *sd; |
6aa8b732 AK |
372 | int r; |
373 | ||
0fe1e009 TH |
374 | sd = kzalloc(sizeof(struct svm_cpu_data), GFP_KERNEL); |
375 | if (!sd) | |
6aa8b732 | 376 | return -ENOMEM; |
0fe1e009 TH |
377 | sd->cpu = cpu; |
378 | sd->save_area = alloc_page(GFP_KERNEL); | |
6aa8b732 | 379 | r = -ENOMEM; |
0fe1e009 | 380 | if (!sd->save_area) |
6aa8b732 AK |
381 | goto err_1; |
382 | ||
0fe1e009 | 383 | per_cpu(svm_data, cpu) = sd; |
6aa8b732 AK |
384 | |
385 | return 0; | |
386 | ||
387 | err_1: | |
0fe1e009 | 388 | kfree(sd); |
6aa8b732 AK |
389 | return r; |
390 | ||
391 | } | |
392 | ||
bfc733a7 RR |
393 | static void set_msr_interception(u32 *msrpm, unsigned msr, |
394 | int read, int write) | |
6aa8b732 AK |
395 | { |
396 | int i; | |
397 | ||
398 | for (i = 0; i < NUM_MSR_MAPS; i++) { | |
399 | if (msr >= msrpm_ranges[i] && | |
400 | msr < msrpm_ranges[i] + MSRS_IN_RANGE) { | |
401 | u32 msr_offset = (i * MSRS_IN_RANGE + msr - | |
402 | msrpm_ranges[i]) * 2; | |
403 | ||
404 | u32 *base = msrpm + (msr_offset / 32); | |
405 | u32 msr_shift = msr_offset % 32; | |
406 | u32 mask = ((write) ? 0 : 2) | ((read) ? 0 : 1); | |
407 | *base = (*base & ~(0x3 << msr_shift)) | | |
408 | (mask << msr_shift); | |
bfc733a7 | 409 | return; |
6aa8b732 AK |
410 | } |
411 | } | |
bfc733a7 | 412 | BUG(); |
6aa8b732 AK |
413 | } |
414 | ||
f65c229c JR |
415 | static void svm_vcpu_init_msrpm(u32 *msrpm) |
416 | { | |
417 | memset(msrpm, 0xff, PAGE_SIZE * (1 << MSRPM_ALLOC_ORDER)); | |
418 | ||
419 | #ifdef CONFIG_X86_64 | |
420 | set_msr_interception(msrpm, MSR_GS_BASE, 1, 1); | |
421 | set_msr_interception(msrpm, MSR_FS_BASE, 1, 1); | |
422 | set_msr_interception(msrpm, MSR_KERNEL_GS_BASE, 1, 1); | |
423 | set_msr_interception(msrpm, MSR_LSTAR, 1, 1); | |
424 | set_msr_interception(msrpm, MSR_CSTAR, 1, 1); | |
425 | set_msr_interception(msrpm, MSR_SYSCALL_MASK, 1, 1); | |
426 | #endif | |
427 | set_msr_interception(msrpm, MSR_K6_STAR, 1, 1); | |
428 | set_msr_interception(msrpm, MSR_IA32_SYSENTER_CS, 1, 1); | |
f65c229c JR |
429 | } |
430 | ||
24e09cbf JR |
431 | static void svm_enable_lbrv(struct vcpu_svm *svm) |
432 | { | |
433 | u32 *msrpm = svm->msrpm; | |
434 | ||
435 | svm->vmcb->control.lbr_ctl = 1; | |
436 | set_msr_interception(msrpm, MSR_IA32_LASTBRANCHFROMIP, 1, 1); | |
437 | set_msr_interception(msrpm, MSR_IA32_LASTBRANCHTOIP, 1, 1); | |
438 | set_msr_interception(msrpm, MSR_IA32_LASTINTFROMIP, 1, 1); | |
439 | set_msr_interception(msrpm, MSR_IA32_LASTINTTOIP, 1, 1); | |
440 | } | |
441 | ||
442 | static void svm_disable_lbrv(struct vcpu_svm *svm) | |
443 | { | |
444 | u32 *msrpm = svm->msrpm; | |
445 | ||
446 | svm->vmcb->control.lbr_ctl = 0; | |
447 | set_msr_interception(msrpm, MSR_IA32_LASTBRANCHFROMIP, 0, 0); | |
448 | set_msr_interception(msrpm, MSR_IA32_LASTBRANCHTOIP, 0, 0); | |
449 | set_msr_interception(msrpm, MSR_IA32_LASTINTFROMIP, 0, 0); | |
450 | set_msr_interception(msrpm, MSR_IA32_LASTINTTOIP, 0, 0); | |
451 | } | |
452 | ||
6aa8b732 AK |
453 | static __init int svm_hardware_setup(void) |
454 | { | |
455 | int cpu; | |
456 | struct page *iopm_pages; | |
f65c229c | 457 | void *iopm_va; |
6aa8b732 AK |
458 | int r; |
459 | ||
6aa8b732 AK |
460 | iopm_pages = alloc_pages(GFP_KERNEL, IOPM_ALLOC_ORDER); |
461 | ||
462 | if (!iopm_pages) | |
463 | return -ENOMEM; | |
c8681339 AL |
464 | |
465 | iopm_va = page_address(iopm_pages); | |
466 | memset(iopm_va, 0xff, PAGE_SIZE * (1 << IOPM_ALLOC_ORDER)); | |
6aa8b732 AK |
467 | iopm_base = page_to_pfn(iopm_pages) << PAGE_SHIFT; |
468 | ||
50a37eb4 JR |
469 | if (boot_cpu_has(X86_FEATURE_NX)) |
470 | kvm_enable_efer_bits(EFER_NX); | |
471 | ||
1b2fd70c AG |
472 | if (boot_cpu_has(X86_FEATURE_FXSR_OPT)) |
473 | kvm_enable_efer_bits(EFER_FFXSR); | |
474 | ||
236de055 AG |
475 | if (nested) { |
476 | printk(KERN_INFO "kvm: Nested Virtualization enabled\n"); | |
477 | kvm_enable_efer_bits(EFER_SVME); | |
478 | } | |
479 | ||
3230bb47 | 480 | for_each_possible_cpu(cpu) { |
6aa8b732 AK |
481 | r = svm_cpu_init(cpu); |
482 | if (r) | |
f65c229c | 483 | goto err; |
6aa8b732 | 484 | } |
33bd6a0b JR |
485 | |
486 | svm_features = cpuid_edx(SVM_CPUID_FUNC); | |
487 | ||
e3da3acd JR |
488 | if (!svm_has(SVM_FEATURE_NPT)) |
489 | npt_enabled = false; | |
490 | ||
6c7dac72 JR |
491 | if (npt_enabled && !npt) { |
492 | printk(KERN_INFO "kvm: Nested Paging disabled\n"); | |
493 | npt_enabled = false; | |
494 | } | |
495 | ||
18552672 | 496 | if (npt_enabled) { |
e3da3acd | 497 | printk(KERN_INFO "kvm: Nested Paging enabled\n"); |
18552672 | 498 | kvm_enable_tdp(); |
5f4cb662 JR |
499 | } else |
500 | kvm_disable_tdp(); | |
e3da3acd | 501 | |
6aa8b732 AK |
502 | return 0; |
503 | ||
f65c229c | 504 | err: |
6aa8b732 AK |
505 | __free_pages(iopm_pages, IOPM_ALLOC_ORDER); |
506 | iopm_base = 0; | |
507 | return r; | |
508 | } | |
509 | ||
510 | static __exit void svm_hardware_unsetup(void) | |
511 | { | |
0da1db75 JR |
512 | int cpu; |
513 | ||
3230bb47 | 514 | for_each_possible_cpu(cpu) |
0da1db75 JR |
515 | svm_cpu_uninit(cpu); |
516 | ||
6aa8b732 | 517 | __free_pages(pfn_to_page(iopm_base >> PAGE_SHIFT), IOPM_ALLOC_ORDER); |
f65c229c | 518 | iopm_base = 0; |
6aa8b732 AK |
519 | } |
520 | ||
521 | static void init_seg(struct vmcb_seg *seg) | |
522 | { | |
523 | seg->selector = 0; | |
524 | seg->attrib = SVM_SELECTOR_P_MASK | SVM_SELECTOR_S_MASK | | |
525 | SVM_SELECTOR_WRITE_MASK; /* Read/Write Data Segment */ | |
526 | seg->limit = 0xffff; | |
527 | seg->base = 0; | |
528 | } | |
529 | ||
530 | static void init_sys_seg(struct vmcb_seg *seg, uint32_t type) | |
531 | { | |
532 | seg->selector = 0; | |
533 | seg->attrib = SVM_SELECTOR_P_MASK | type; | |
534 | seg->limit = 0xffff; | |
535 | seg->base = 0; | |
536 | } | |
537 | ||
e6101a96 | 538 | static void init_vmcb(struct vcpu_svm *svm) |
6aa8b732 | 539 | { |
e6101a96 JR |
540 | struct vmcb_control_area *control = &svm->vmcb->control; |
541 | struct vmcb_save_area *save = &svm->vmcb->save; | |
6aa8b732 AK |
542 | |
543 | control->intercept_cr_read = INTERCEPT_CR0_MASK | | |
544 | INTERCEPT_CR3_MASK | | |
649d6864 | 545 | INTERCEPT_CR4_MASK; |
6aa8b732 AK |
546 | |
547 | control->intercept_cr_write = INTERCEPT_CR0_MASK | | |
548 | INTERCEPT_CR3_MASK | | |
80a8119c AK |
549 | INTERCEPT_CR4_MASK | |
550 | INTERCEPT_CR8_MASK; | |
6aa8b732 AK |
551 | |
552 | control->intercept_dr_read = INTERCEPT_DR0_MASK | | |
553 | INTERCEPT_DR1_MASK | | |
554 | INTERCEPT_DR2_MASK | | |
555 | INTERCEPT_DR3_MASK; | |
556 | ||
557 | control->intercept_dr_write = INTERCEPT_DR0_MASK | | |
558 | INTERCEPT_DR1_MASK | | |
559 | INTERCEPT_DR2_MASK | | |
560 | INTERCEPT_DR3_MASK | | |
561 | INTERCEPT_DR5_MASK | | |
562 | INTERCEPT_DR7_MASK; | |
563 | ||
7aa81cc0 | 564 | control->intercept_exceptions = (1 << PF_VECTOR) | |
53371b50 JR |
565 | (1 << UD_VECTOR) | |
566 | (1 << MC_VECTOR); | |
6aa8b732 AK |
567 | |
568 | ||
569 | control->intercept = (1ULL << INTERCEPT_INTR) | | |
570 | (1ULL << INTERCEPT_NMI) | | |
0152527b | 571 | (1ULL << INTERCEPT_SMI) | |
6aa8b732 | 572 | (1ULL << INTERCEPT_CPUID) | |
cf5a94d1 | 573 | (1ULL << INTERCEPT_INVD) | |
6aa8b732 | 574 | (1ULL << INTERCEPT_HLT) | |
a7052897 | 575 | (1ULL << INTERCEPT_INVLPG) | |
6aa8b732 AK |
576 | (1ULL << INTERCEPT_INVLPGA) | |
577 | (1ULL << INTERCEPT_IOIO_PROT) | | |
578 | (1ULL << INTERCEPT_MSR_PROT) | | |
579 | (1ULL << INTERCEPT_TASK_SWITCH) | | |
46fe4ddd | 580 | (1ULL << INTERCEPT_SHUTDOWN) | |
6aa8b732 AK |
581 | (1ULL << INTERCEPT_VMRUN) | |
582 | (1ULL << INTERCEPT_VMMCALL) | | |
583 | (1ULL << INTERCEPT_VMLOAD) | | |
584 | (1ULL << INTERCEPT_VMSAVE) | | |
585 | (1ULL << INTERCEPT_STGI) | | |
586 | (1ULL << INTERCEPT_CLGI) | | |
916ce236 | 587 | (1ULL << INTERCEPT_SKINIT) | |
cf5a94d1 | 588 | (1ULL << INTERCEPT_WBINVD) | |
916ce236 JR |
589 | (1ULL << INTERCEPT_MONITOR) | |
590 | (1ULL << INTERCEPT_MWAIT); | |
6aa8b732 AK |
591 | |
592 | control->iopm_base_pa = iopm_base; | |
f65c229c | 593 | control->msrpm_base_pa = __pa(svm->msrpm); |
0cc5064d | 594 | control->tsc_offset = 0; |
6aa8b732 AK |
595 | control->int_ctl = V_INTR_MASKING_MASK; |
596 | ||
597 | init_seg(&save->es); | |
598 | init_seg(&save->ss); | |
599 | init_seg(&save->ds); | |
600 | init_seg(&save->fs); | |
601 | init_seg(&save->gs); | |
602 | ||
603 | save->cs.selector = 0xf000; | |
604 | /* Executable/Readable Code Segment */ | |
605 | save->cs.attrib = SVM_SELECTOR_READ_MASK | SVM_SELECTOR_P_MASK | | |
606 | SVM_SELECTOR_S_MASK | SVM_SELECTOR_CODE_MASK; | |
607 | save->cs.limit = 0xffff; | |
d92899a0 AK |
608 | /* |
609 | * cs.base should really be 0xffff0000, but vmx can't handle that, so | |
610 | * be consistent with it. | |
611 | * | |
612 | * Replace when we have real mode working for vmx. | |
613 | */ | |
614 | save->cs.base = 0xf0000; | |
6aa8b732 AK |
615 | |
616 | save->gdtr.limit = 0xffff; | |
617 | save->idtr.limit = 0xffff; | |
618 | ||
619 | init_sys_seg(&save->ldtr, SEG_TYPE_LDT); | |
620 | init_sys_seg(&save->tr, SEG_TYPE_BUSY_TSS16); | |
621 | ||
9962d032 | 622 | save->efer = EFER_SVME; |
d77c26fc | 623 | save->dr6 = 0xffff0ff0; |
6aa8b732 AK |
624 | save->dr7 = 0x400; |
625 | save->rflags = 2; | |
626 | save->rip = 0x0000fff0; | |
5fdbf976 | 627 | svm->vcpu.arch.regs[VCPU_REGS_RIP] = save->rip; |
6aa8b732 | 628 | |
18fa000a EH |
629 | /* This is the guest-visible cr0 value. |
630 | * svm_set_cr0() sets PG and WP and clears NW and CD on save->cr0. | |
6aa8b732 | 631 | */ |
18fa000a EH |
632 | svm->vcpu.arch.cr0 = X86_CR0_NW | X86_CR0_CD | X86_CR0_ET; |
633 | kvm_set_cr0(&svm->vcpu, svm->vcpu.arch.cr0); | |
634 | ||
66aee91a | 635 | save->cr4 = X86_CR4_PAE; |
6aa8b732 | 636 | /* rdx = ?? */ |
709ddebf JR |
637 | |
638 | if (npt_enabled) { | |
639 | /* Setup VMCB for Nested Paging */ | |
640 | control->nested_ctl = 1; | |
a7052897 MT |
641 | control->intercept &= ~((1ULL << INTERCEPT_TASK_SWITCH) | |
642 | (1ULL << INTERCEPT_INVLPG)); | |
709ddebf JR |
643 | control->intercept_exceptions &= ~(1 << PF_VECTOR); |
644 | control->intercept_cr_read &= ~(INTERCEPT_CR0_MASK| | |
645 | INTERCEPT_CR3_MASK); | |
646 | control->intercept_cr_write &= ~(INTERCEPT_CR0_MASK| | |
647 | INTERCEPT_CR3_MASK); | |
648 | save->g_pat = 0x0007040600070406ULL; | |
709ddebf JR |
649 | save->cr3 = 0; |
650 | save->cr4 = 0; | |
651 | } | |
a79d2f18 | 652 | force_new_asid(&svm->vcpu); |
1371d904 | 653 | |
e6aa9abd | 654 | svm->nested.vmcb = 0; |
2af9194d JR |
655 | svm->vcpu.arch.hflags = 0; |
656 | ||
565d0998 ML |
657 | if (svm_has(SVM_FEATURE_PAUSE_FILTER)) { |
658 | control->pause_filter_count = 3000; | |
659 | control->intercept |= (1ULL << INTERCEPT_PAUSE); | |
660 | } | |
661 | ||
2af9194d | 662 | enable_gif(svm); |
6aa8b732 AK |
663 | } |
664 | ||
e00c8cf2 | 665 | static int svm_vcpu_reset(struct kvm_vcpu *vcpu) |
04d2cc77 AK |
666 | { |
667 | struct vcpu_svm *svm = to_svm(vcpu); | |
668 | ||
e6101a96 | 669 | init_vmcb(svm); |
70433389 | 670 | |
c5af89b6 | 671 | if (!kvm_vcpu_is_bsp(vcpu)) { |
5fdbf976 | 672 | kvm_rip_write(vcpu, 0); |
ad312c7c ZX |
673 | svm->vmcb->save.cs.base = svm->vcpu.arch.sipi_vector << 12; |
674 | svm->vmcb->save.cs.selector = svm->vcpu.arch.sipi_vector << 8; | |
70433389 | 675 | } |
5fdbf976 MT |
676 | vcpu->arch.regs_avail = ~0; |
677 | vcpu->arch.regs_dirty = ~0; | |
e00c8cf2 AK |
678 | |
679 | return 0; | |
04d2cc77 AK |
680 | } |
681 | ||
fb3f0f51 | 682 | static struct kvm_vcpu *svm_create_vcpu(struct kvm *kvm, unsigned int id) |
6aa8b732 | 683 | { |
a2fa3e9f | 684 | struct vcpu_svm *svm; |
6aa8b732 | 685 | struct page *page; |
f65c229c | 686 | struct page *msrpm_pages; |
b286d5d8 | 687 | struct page *hsave_page; |
3d6368ef | 688 | struct page *nested_msrpm_pages; |
fb3f0f51 | 689 | int err; |
6aa8b732 | 690 | |
c16f862d | 691 | svm = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); |
fb3f0f51 RR |
692 | if (!svm) { |
693 | err = -ENOMEM; | |
694 | goto out; | |
695 | } | |
696 | ||
697 | err = kvm_vcpu_init(&svm->vcpu, kvm, id); | |
698 | if (err) | |
699 | goto free_svm; | |
700 | ||
6aa8b732 | 701 | page = alloc_page(GFP_KERNEL); |
fb3f0f51 RR |
702 | if (!page) { |
703 | err = -ENOMEM; | |
704 | goto uninit; | |
705 | } | |
6aa8b732 | 706 | |
f65c229c JR |
707 | err = -ENOMEM; |
708 | msrpm_pages = alloc_pages(GFP_KERNEL, MSRPM_ALLOC_ORDER); | |
709 | if (!msrpm_pages) | |
710 | goto uninit; | |
3d6368ef AG |
711 | |
712 | nested_msrpm_pages = alloc_pages(GFP_KERNEL, MSRPM_ALLOC_ORDER); | |
713 | if (!nested_msrpm_pages) | |
714 | goto uninit; | |
715 | ||
f65c229c JR |
716 | svm->msrpm = page_address(msrpm_pages); |
717 | svm_vcpu_init_msrpm(svm->msrpm); | |
718 | ||
b286d5d8 AG |
719 | hsave_page = alloc_page(GFP_KERNEL); |
720 | if (!hsave_page) | |
721 | goto uninit; | |
e6aa9abd | 722 | svm->nested.hsave = page_address(hsave_page); |
b286d5d8 | 723 | |
e6aa9abd | 724 | svm->nested.msrpm = page_address(nested_msrpm_pages); |
3d6368ef | 725 | |
a2fa3e9f GH |
726 | svm->vmcb = page_address(page); |
727 | clear_page(svm->vmcb); | |
728 | svm->vmcb_pa = page_to_pfn(page) << PAGE_SHIFT; | |
729 | svm->asid_generation = 0; | |
e6101a96 | 730 | init_vmcb(svm); |
a2fa3e9f | 731 | |
fb3f0f51 RR |
732 | fx_init(&svm->vcpu); |
733 | svm->vcpu.fpu_active = 1; | |
ad312c7c | 734 | svm->vcpu.arch.apic_base = 0xfee00000 | MSR_IA32_APICBASE_ENABLE; |
c5af89b6 | 735 | if (kvm_vcpu_is_bsp(&svm->vcpu)) |
ad312c7c | 736 | svm->vcpu.arch.apic_base |= MSR_IA32_APICBASE_BSP; |
6aa8b732 | 737 | |
fb3f0f51 | 738 | return &svm->vcpu; |
36241b8c | 739 | |
fb3f0f51 RR |
740 | uninit: |
741 | kvm_vcpu_uninit(&svm->vcpu); | |
742 | free_svm: | |
a4770347 | 743 | kmem_cache_free(kvm_vcpu_cache, svm); |
fb3f0f51 RR |
744 | out: |
745 | return ERR_PTR(err); | |
6aa8b732 AK |
746 | } |
747 | ||
748 | static void svm_free_vcpu(struct kvm_vcpu *vcpu) | |
749 | { | |
a2fa3e9f GH |
750 | struct vcpu_svm *svm = to_svm(vcpu); |
751 | ||
fb3f0f51 | 752 | __free_page(pfn_to_page(svm->vmcb_pa >> PAGE_SHIFT)); |
f65c229c | 753 | __free_pages(virt_to_page(svm->msrpm), MSRPM_ALLOC_ORDER); |
e6aa9abd JR |
754 | __free_page(virt_to_page(svm->nested.hsave)); |
755 | __free_pages(virt_to_page(svm->nested.msrpm), MSRPM_ALLOC_ORDER); | |
fb3f0f51 | 756 | kvm_vcpu_uninit(vcpu); |
a4770347 | 757 | kmem_cache_free(kvm_vcpu_cache, svm); |
6aa8b732 AK |
758 | } |
759 | ||
15ad7146 | 760 | static void svm_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
6aa8b732 | 761 | { |
a2fa3e9f | 762 | struct vcpu_svm *svm = to_svm(vcpu); |
15ad7146 | 763 | int i; |
0cc5064d | 764 | |
0cc5064d | 765 | if (unlikely(cpu != vcpu->cpu)) { |
e935d48e | 766 | u64 delta; |
0cc5064d | 767 | |
953899b6 JR |
768 | if (check_tsc_unstable()) { |
769 | /* | |
770 | * Make sure that the guest sees a monotonically | |
771 | * increasing TSC. | |
772 | */ | |
773 | delta = vcpu->arch.host_tsc - native_read_tsc(); | |
774 | svm->vmcb->control.tsc_offset += delta; | |
775 | if (is_nested(svm)) | |
776 | svm->nested.hsave->control.tsc_offset += delta; | |
777 | } | |
0cc5064d | 778 | vcpu->cpu = cpu; |
2f599714 | 779 | kvm_migrate_timers(vcpu); |
4b656b12 | 780 | svm->asid_generation = 0; |
0cc5064d | 781 | } |
94dfbdb3 AL |
782 | |
783 | for (i = 0; i < NR_HOST_SAVE_USER_MSRS; i++) | |
a2fa3e9f | 784 | rdmsrl(host_save_user_msrs[i], svm->host_user_msrs[i]); |
6aa8b732 AK |
785 | } |
786 | ||
787 | static void svm_vcpu_put(struct kvm_vcpu *vcpu) | |
788 | { | |
a2fa3e9f | 789 | struct vcpu_svm *svm = to_svm(vcpu); |
94dfbdb3 AL |
790 | int i; |
791 | ||
e1beb1d3 | 792 | ++vcpu->stat.host_state_reload; |
94dfbdb3 | 793 | for (i = 0; i < NR_HOST_SAVE_USER_MSRS; i++) |
a2fa3e9f | 794 | wrmsrl(host_save_user_msrs[i], svm->host_user_msrs[i]); |
94dfbdb3 | 795 | |
e935d48e | 796 | vcpu->arch.host_tsc = native_read_tsc(); |
6aa8b732 AK |
797 | } |
798 | ||
6aa8b732 AK |
799 | static unsigned long svm_get_rflags(struct kvm_vcpu *vcpu) |
800 | { | |
a2fa3e9f | 801 | return to_svm(vcpu)->vmcb->save.rflags; |
6aa8b732 AK |
802 | } |
803 | ||
804 | static void svm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags) | |
805 | { | |
a2fa3e9f | 806 | to_svm(vcpu)->vmcb->save.rflags = rflags; |
6aa8b732 AK |
807 | } |
808 | ||
6de4f3ad AK |
809 | static void svm_cache_reg(struct kvm_vcpu *vcpu, enum kvm_reg reg) |
810 | { | |
811 | switch (reg) { | |
812 | case VCPU_EXREG_PDPTR: | |
813 | BUG_ON(!npt_enabled); | |
814 | load_pdptrs(vcpu, vcpu->arch.cr3); | |
815 | break; | |
816 | default: | |
817 | BUG(); | |
818 | } | |
819 | } | |
820 | ||
f0b85051 AG |
821 | static void svm_set_vintr(struct vcpu_svm *svm) |
822 | { | |
823 | svm->vmcb->control.intercept |= 1ULL << INTERCEPT_VINTR; | |
824 | } | |
825 | ||
826 | static void svm_clear_vintr(struct vcpu_svm *svm) | |
827 | { | |
828 | svm->vmcb->control.intercept &= ~(1ULL << INTERCEPT_VINTR); | |
829 | } | |
830 | ||
6aa8b732 AK |
831 | static struct vmcb_seg *svm_seg(struct kvm_vcpu *vcpu, int seg) |
832 | { | |
a2fa3e9f | 833 | struct vmcb_save_area *save = &to_svm(vcpu)->vmcb->save; |
6aa8b732 AK |
834 | |
835 | switch (seg) { | |
836 | case VCPU_SREG_CS: return &save->cs; | |
837 | case VCPU_SREG_DS: return &save->ds; | |
838 | case VCPU_SREG_ES: return &save->es; | |
839 | case VCPU_SREG_FS: return &save->fs; | |
840 | case VCPU_SREG_GS: return &save->gs; | |
841 | case VCPU_SREG_SS: return &save->ss; | |
842 | case VCPU_SREG_TR: return &save->tr; | |
843 | case VCPU_SREG_LDTR: return &save->ldtr; | |
844 | } | |
845 | BUG(); | |
8b6d44c7 | 846 | return NULL; |
6aa8b732 AK |
847 | } |
848 | ||
849 | static u64 svm_get_segment_base(struct kvm_vcpu *vcpu, int seg) | |
850 | { | |
851 | struct vmcb_seg *s = svm_seg(vcpu, seg); | |
852 | ||
853 | return s->base; | |
854 | } | |
855 | ||
856 | static void svm_get_segment(struct kvm_vcpu *vcpu, | |
857 | struct kvm_segment *var, int seg) | |
858 | { | |
859 | struct vmcb_seg *s = svm_seg(vcpu, seg); | |
860 | ||
861 | var->base = s->base; | |
862 | var->limit = s->limit; | |
863 | var->selector = s->selector; | |
864 | var->type = s->attrib & SVM_SELECTOR_TYPE_MASK; | |
865 | var->s = (s->attrib >> SVM_SELECTOR_S_SHIFT) & 1; | |
866 | var->dpl = (s->attrib >> SVM_SELECTOR_DPL_SHIFT) & 3; | |
867 | var->present = (s->attrib >> SVM_SELECTOR_P_SHIFT) & 1; | |
868 | var->avl = (s->attrib >> SVM_SELECTOR_AVL_SHIFT) & 1; | |
869 | var->l = (s->attrib >> SVM_SELECTOR_L_SHIFT) & 1; | |
870 | var->db = (s->attrib >> SVM_SELECTOR_DB_SHIFT) & 1; | |
871 | var->g = (s->attrib >> SVM_SELECTOR_G_SHIFT) & 1; | |
25022acc | 872 | |
19bca6ab AP |
873 | /* AMD's VMCB does not have an explicit unusable field, so emulate it |
874 | * for cross vendor migration purposes by "not present" | |
875 | */ | |
876 | var->unusable = !var->present || (var->type == 0); | |
877 | ||
1fbdc7a5 AP |
878 | switch (seg) { |
879 | case VCPU_SREG_CS: | |
880 | /* | |
881 | * SVM always stores 0 for the 'G' bit in the CS selector in | |
882 | * the VMCB on a VMEXIT. This hurts cross-vendor migration: | |
883 | * Intel's VMENTRY has a check on the 'G' bit. | |
884 | */ | |
25022acc | 885 | var->g = s->limit > 0xfffff; |
1fbdc7a5 AP |
886 | break; |
887 | case VCPU_SREG_TR: | |
888 | /* | |
889 | * Work around a bug where the busy flag in the tr selector | |
890 | * isn't exposed | |
891 | */ | |
c0d09828 | 892 | var->type |= 0x2; |
1fbdc7a5 AP |
893 | break; |
894 | case VCPU_SREG_DS: | |
895 | case VCPU_SREG_ES: | |
896 | case VCPU_SREG_FS: | |
897 | case VCPU_SREG_GS: | |
898 | /* | |
899 | * The accessed bit must always be set in the segment | |
900 | * descriptor cache, although it can be cleared in the | |
901 | * descriptor, the cached bit always remains at 1. Since | |
902 | * Intel has a check on this, set it here to support | |
903 | * cross-vendor migration. | |
904 | */ | |
905 | if (!var->unusable) | |
906 | var->type |= 0x1; | |
907 | break; | |
b586eb02 AP |
908 | case VCPU_SREG_SS: |
909 | /* On AMD CPUs sometimes the DB bit in the segment | |
910 | * descriptor is left as 1, although the whole segment has | |
911 | * been made unusable. Clear it here to pass an Intel VMX | |
912 | * entry check when cross vendor migrating. | |
913 | */ | |
914 | if (var->unusable) | |
915 | var->db = 0; | |
916 | break; | |
1fbdc7a5 | 917 | } |
6aa8b732 AK |
918 | } |
919 | ||
2e4d2653 IE |
920 | static int svm_get_cpl(struct kvm_vcpu *vcpu) |
921 | { | |
922 | struct vmcb_save_area *save = &to_svm(vcpu)->vmcb->save; | |
923 | ||
924 | return save->cpl; | |
925 | } | |
926 | ||
6aa8b732 AK |
927 | static void svm_get_idt(struct kvm_vcpu *vcpu, struct descriptor_table *dt) |
928 | { | |
a2fa3e9f GH |
929 | struct vcpu_svm *svm = to_svm(vcpu); |
930 | ||
931 | dt->limit = svm->vmcb->save.idtr.limit; | |
932 | dt->base = svm->vmcb->save.idtr.base; | |
6aa8b732 AK |
933 | } |
934 | ||
935 | static void svm_set_idt(struct kvm_vcpu *vcpu, struct descriptor_table *dt) | |
936 | { | |
a2fa3e9f GH |
937 | struct vcpu_svm *svm = to_svm(vcpu); |
938 | ||
939 | svm->vmcb->save.idtr.limit = dt->limit; | |
940 | svm->vmcb->save.idtr.base = dt->base ; | |
6aa8b732 AK |
941 | } |
942 | ||
943 | static void svm_get_gdt(struct kvm_vcpu *vcpu, struct descriptor_table *dt) | |
944 | { | |
a2fa3e9f GH |
945 | struct vcpu_svm *svm = to_svm(vcpu); |
946 | ||
947 | dt->limit = svm->vmcb->save.gdtr.limit; | |
948 | dt->base = svm->vmcb->save.gdtr.base; | |
6aa8b732 AK |
949 | } |
950 | ||
951 | static void svm_set_gdt(struct kvm_vcpu *vcpu, struct descriptor_table *dt) | |
952 | { | |
a2fa3e9f GH |
953 | struct vcpu_svm *svm = to_svm(vcpu); |
954 | ||
955 | svm->vmcb->save.gdtr.limit = dt->limit; | |
956 | svm->vmcb->save.gdtr.base = dt->base ; | |
6aa8b732 AK |
957 | } |
958 | ||
e8467fda AK |
959 | static void svm_decache_cr0_guest_bits(struct kvm_vcpu *vcpu) |
960 | { | |
961 | } | |
962 | ||
25c4c276 | 963 | static void svm_decache_cr4_guest_bits(struct kvm_vcpu *vcpu) |
399badf3 AK |
964 | { |
965 | } | |
966 | ||
6aa8b732 AK |
967 | static void svm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) |
968 | { | |
a2fa3e9f GH |
969 | struct vcpu_svm *svm = to_svm(vcpu); |
970 | ||
05b3e0c2 | 971 | #ifdef CONFIG_X86_64 |
ad312c7c | 972 | if (vcpu->arch.shadow_efer & EFER_LME) { |
707d92fa | 973 | if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) { |
ad312c7c | 974 | vcpu->arch.shadow_efer |= EFER_LMA; |
2b5203ee | 975 | svm->vmcb->save.efer |= EFER_LMA | EFER_LME; |
6aa8b732 AK |
976 | } |
977 | ||
d77c26fc | 978 | if (is_paging(vcpu) && !(cr0 & X86_CR0_PG)) { |
ad312c7c | 979 | vcpu->arch.shadow_efer &= ~EFER_LMA; |
2b5203ee | 980 | svm->vmcb->save.efer &= ~(EFER_LMA | EFER_LME); |
6aa8b732 AK |
981 | } |
982 | } | |
983 | #endif | |
709ddebf JR |
984 | if (npt_enabled) |
985 | goto set; | |
986 | ||
ad312c7c | 987 | vcpu->arch.cr0 = cr0; |
707d92fa | 988 | cr0 |= X86_CR0_PG | X86_CR0_WP; |
02daab21 AK |
989 | |
990 | if (!vcpu->fpu_active) | |
334df50a | 991 | cr0 |= X86_CR0_TS; |
709ddebf JR |
992 | set: |
993 | /* | |
994 | * re-enable caching here because the QEMU bios | |
995 | * does not do it - this results in some delay at | |
996 | * reboot | |
997 | */ | |
998 | cr0 &= ~(X86_CR0_CD | X86_CR0_NW); | |
a2fa3e9f | 999 | svm->vmcb->save.cr0 = cr0; |
6aa8b732 AK |
1000 | } |
1001 | ||
1002 | static void svm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4) | |
1003 | { | |
6394b649 | 1004 | unsigned long host_cr4_mce = read_cr4() & X86_CR4_MCE; |
e5eab0ce JR |
1005 | unsigned long old_cr4 = to_svm(vcpu)->vmcb->save.cr4; |
1006 | ||
1007 | if (npt_enabled && ((old_cr4 ^ cr4) & X86_CR4_PGE)) | |
1008 | force_new_asid(vcpu); | |
6394b649 | 1009 | |
ec077263 JR |
1010 | vcpu->arch.cr4 = cr4; |
1011 | if (!npt_enabled) | |
1012 | cr4 |= X86_CR4_PAE; | |
6394b649 | 1013 | cr4 |= host_cr4_mce; |
ec077263 | 1014 | to_svm(vcpu)->vmcb->save.cr4 = cr4; |
6aa8b732 AK |
1015 | } |
1016 | ||
1017 | static void svm_set_segment(struct kvm_vcpu *vcpu, | |
1018 | struct kvm_segment *var, int seg) | |
1019 | { | |
a2fa3e9f | 1020 | struct vcpu_svm *svm = to_svm(vcpu); |
6aa8b732 AK |
1021 | struct vmcb_seg *s = svm_seg(vcpu, seg); |
1022 | ||
1023 | s->base = var->base; | |
1024 | s->limit = var->limit; | |
1025 | s->selector = var->selector; | |
1026 | if (var->unusable) | |
1027 | s->attrib = 0; | |
1028 | else { | |
1029 | s->attrib = (var->type & SVM_SELECTOR_TYPE_MASK); | |
1030 | s->attrib |= (var->s & 1) << SVM_SELECTOR_S_SHIFT; | |
1031 | s->attrib |= (var->dpl & 3) << SVM_SELECTOR_DPL_SHIFT; | |
1032 | s->attrib |= (var->present & 1) << SVM_SELECTOR_P_SHIFT; | |
1033 | s->attrib |= (var->avl & 1) << SVM_SELECTOR_AVL_SHIFT; | |
1034 | s->attrib |= (var->l & 1) << SVM_SELECTOR_L_SHIFT; | |
1035 | s->attrib |= (var->db & 1) << SVM_SELECTOR_DB_SHIFT; | |
1036 | s->attrib |= (var->g & 1) << SVM_SELECTOR_G_SHIFT; | |
1037 | } | |
1038 | if (seg == VCPU_SREG_CS) | |
a2fa3e9f GH |
1039 | svm->vmcb->save.cpl |
1040 | = (svm->vmcb->save.cs.attrib | |
6aa8b732 AK |
1041 | >> SVM_SELECTOR_DPL_SHIFT) & 3; |
1042 | ||
1043 | } | |
1044 | ||
44c11430 | 1045 | static void update_db_intercept(struct kvm_vcpu *vcpu) |
6aa8b732 | 1046 | { |
d0bfb940 JK |
1047 | struct vcpu_svm *svm = to_svm(vcpu); |
1048 | ||
d0bfb940 JK |
1049 | svm->vmcb->control.intercept_exceptions &= |
1050 | ~((1 << DB_VECTOR) | (1 << BP_VECTOR)); | |
44c11430 | 1051 | |
6be7d306 | 1052 | if (svm->nmi_singlestep) |
44c11430 GN |
1053 | svm->vmcb->control.intercept_exceptions |= (1 << DB_VECTOR); |
1054 | ||
d0bfb940 JK |
1055 | if (vcpu->guest_debug & KVM_GUESTDBG_ENABLE) { |
1056 | if (vcpu->guest_debug & | |
1057 | (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP)) | |
1058 | svm->vmcb->control.intercept_exceptions |= | |
1059 | 1 << DB_VECTOR; | |
1060 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP) | |
1061 | svm->vmcb->control.intercept_exceptions |= | |
1062 | 1 << BP_VECTOR; | |
1063 | } else | |
1064 | vcpu->guest_debug = 0; | |
44c11430 GN |
1065 | } |
1066 | ||
355be0b9 | 1067 | static void svm_guest_debug(struct kvm_vcpu *vcpu, struct kvm_guest_debug *dbg) |
44c11430 | 1068 | { |
44c11430 GN |
1069 | struct vcpu_svm *svm = to_svm(vcpu); |
1070 | ||
ae675ef0 JK |
1071 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) |
1072 | svm->vmcb->save.dr7 = dbg->arch.debugreg[7]; | |
1073 | else | |
1074 | svm->vmcb->save.dr7 = vcpu->arch.dr7; | |
1075 | ||
355be0b9 | 1076 | update_db_intercept(vcpu); |
6aa8b732 AK |
1077 | } |
1078 | ||
1079 | static void load_host_msrs(struct kvm_vcpu *vcpu) | |
1080 | { | |
94dfbdb3 | 1081 | #ifdef CONFIG_X86_64 |
a2fa3e9f | 1082 | wrmsrl(MSR_GS_BASE, to_svm(vcpu)->host_gs_base); |
94dfbdb3 | 1083 | #endif |
6aa8b732 AK |
1084 | } |
1085 | ||
1086 | static void save_host_msrs(struct kvm_vcpu *vcpu) | |
1087 | { | |
94dfbdb3 | 1088 | #ifdef CONFIG_X86_64 |
a2fa3e9f | 1089 | rdmsrl(MSR_GS_BASE, to_svm(vcpu)->host_gs_base); |
94dfbdb3 | 1090 | #endif |
6aa8b732 AK |
1091 | } |
1092 | ||
0fe1e009 | 1093 | static void new_asid(struct vcpu_svm *svm, struct svm_cpu_data *sd) |
6aa8b732 | 1094 | { |
0fe1e009 TH |
1095 | if (sd->next_asid > sd->max_asid) { |
1096 | ++sd->asid_generation; | |
1097 | sd->next_asid = 1; | |
a2fa3e9f | 1098 | svm->vmcb->control.tlb_ctl = TLB_CONTROL_FLUSH_ALL_ASID; |
6aa8b732 AK |
1099 | } |
1100 | ||
0fe1e009 TH |
1101 | svm->asid_generation = sd->asid_generation; |
1102 | svm->vmcb->control.asid = sd->next_asid++; | |
6aa8b732 AK |
1103 | } |
1104 | ||
6aa8b732 AK |
1105 | static unsigned long svm_get_dr(struct kvm_vcpu *vcpu, int dr) |
1106 | { | |
42dbaa5a JK |
1107 | struct vcpu_svm *svm = to_svm(vcpu); |
1108 | unsigned long val; | |
1109 | ||
1110 | switch (dr) { | |
1111 | case 0 ... 3: | |
1112 | val = vcpu->arch.db[dr]; | |
1113 | break; | |
1114 | case 6: | |
1115 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) | |
1116 | val = vcpu->arch.dr6; | |
1117 | else | |
1118 | val = svm->vmcb->save.dr6; | |
1119 | break; | |
1120 | case 7: | |
1121 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) | |
1122 | val = vcpu->arch.dr7; | |
1123 | else | |
1124 | val = svm->vmcb->save.dr7; | |
1125 | break; | |
1126 | default: | |
1127 | val = 0; | |
1128 | } | |
1129 | ||
af9ca2d7 | 1130 | return val; |
6aa8b732 AK |
1131 | } |
1132 | ||
1133 | static void svm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long value, | |
1134 | int *exception) | |
1135 | { | |
a2fa3e9f GH |
1136 | struct vcpu_svm *svm = to_svm(vcpu); |
1137 | ||
42dbaa5a | 1138 | *exception = 0; |
6aa8b732 AK |
1139 | |
1140 | switch (dr) { | |
1141 | case 0 ... 3: | |
42dbaa5a JK |
1142 | vcpu->arch.db[dr] = value; |
1143 | if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)) | |
1144 | vcpu->arch.eff_db[dr] = value; | |
6aa8b732 AK |
1145 | return; |
1146 | case 4 ... 5: | |
42dbaa5a | 1147 | if (vcpu->arch.cr4 & X86_CR4_DE) |
6aa8b732 | 1148 | *exception = UD_VECTOR; |
42dbaa5a JK |
1149 | return; |
1150 | case 6: | |
1151 | if (value & 0xffffffff00000000ULL) { | |
1152 | *exception = GP_VECTOR; | |
6aa8b732 AK |
1153 | return; |
1154 | } | |
42dbaa5a JK |
1155 | vcpu->arch.dr6 = (value & DR6_VOLATILE) | DR6_FIXED_1; |
1156 | return; | |
1157 | case 7: | |
1158 | if (value & 0xffffffff00000000ULL) { | |
6aa8b732 AK |
1159 | *exception = GP_VECTOR; |
1160 | return; | |
1161 | } | |
42dbaa5a JK |
1162 | vcpu->arch.dr7 = (value & DR7_VOLATILE) | DR7_FIXED_1; |
1163 | if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)) { | |
1164 | svm->vmcb->save.dr7 = vcpu->arch.dr7; | |
1165 | vcpu->arch.switch_db_regs = (value & DR7_BP_EN_MASK); | |
1166 | } | |
6aa8b732 | 1167 | return; |
6aa8b732 | 1168 | default: |
42dbaa5a | 1169 | /* FIXME: Possible case? */ |
6aa8b732 | 1170 | printk(KERN_DEBUG "%s: unexpected dr %u\n", |
b8688d51 | 1171 | __func__, dr); |
6aa8b732 AK |
1172 | *exception = UD_VECTOR; |
1173 | return; | |
1174 | } | |
1175 | } | |
1176 | ||
851ba692 | 1177 | static int pf_interception(struct vcpu_svm *svm) |
6aa8b732 | 1178 | { |
6aa8b732 AK |
1179 | u64 fault_address; |
1180 | u32 error_code; | |
6aa8b732 | 1181 | |
a2fa3e9f GH |
1182 | fault_address = svm->vmcb->control.exit_info_2; |
1183 | error_code = svm->vmcb->control.exit_info_1; | |
af9ca2d7 | 1184 | |
229456fc | 1185 | trace_kvm_page_fault(fault_address, error_code); |
52c7847d AK |
1186 | if (!npt_enabled && kvm_event_needs_reinjection(&svm->vcpu)) |
1187 | kvm_mmu_unprotect_page_virt(&svm->vcpu, fault_address); | |
3067714c | 1188 | return kvm_mmu_page_fault(&svm->vcpu, fault_address, error_code); |
6aa8b732 AK |
1189 | } |
1190 | ||
851ba692 | 1191 | static int db_interception(struct vcpu_svm *svm) |
d0bfb940 | 1192 | { |
851ba692 AK |
1193 | struct kvm_run *kvm_run = svm->vcpu.run; |
1194 | ||
d0bfb940 | 1195 | if (!(svm->vcpu.guest_debug & |
44c11430 | 1196 | (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP)) && |
6be7d306 | 1197 | !svm->nmi_singlestep) { |
d0bfb940 JK |
1198 | kvm_queue_exception(&svm->vcpu, DB_VECTOR); |
1199 | return 1; | |
1200 | } | |
44c11430 | 1201 | |
6be7d306 JK |
1202 | if (svm->nmi_singlestep) { |
1203 | svm->nmi_singlestep = false; | |
44c11430 GN |
1204 | if (!(svm->vcpu.guest_debug & KVM_GUESTDBG_SINGLESTEP)) |
1205 | svm->vmcb->save.rflags &= | |
1206 | ~(X86_EFLAGS_TF | X86_EFLAGS_RF); | |
1207 | update_db_intercept(&svm->vcpu); | |
1208 | } | |
1209 | ||
1210 | if (svm->vcpu.guest_debug & | |
1211 | (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP)){ | |
1212 | kvm_run->exit_reason = KVM_EXIT_DEBUG; | |
1213 | kvm_run->debug.arch.pc = | |
1214 | svm->vmcb->save.cs.base + svm->vmcb->save.rip; | |
1215 | kvm_run->debug.arch.exception = DB_VECTOR; | |
1216 | return 0; | |
1217 | } | |
1218 | ||
1219 | return 1; | |
d0bfb940 JK |
1220 | } |
1221 | ||
851ba692 | 1222 | static int bp_interception(struct vcpu_svm *svm) |
d0bfb940 | 1223 | { |
851ba692 AK |
1224 | struct kvm_run *kvm_run = svm->vcpu.run; |
1225 | ||
d0bfb940 JK |
1226 | kvm_run->exit_reason = KVM_EXIT_DEBUG; |
1227 | kvm_run->debug.arch.pc = svm->vmcb->save.cs.base + svm->vmcb->save.rip; | |
1228 | kvm_run->debug.arch.exception = BP_VECTOR; | |
1229 | return 0; | |
1230 | } | |
1231 | ||
851ba692 | 1232 | static int ud_interception(struct vcpu_svm *svm) |
7aa81cc0 AL |
1233 | { |
1234 | int er; | |
1235 | ||
851ba692 | 1236 | er = emulate_instruction(&svm->vcpu, 0, 0, EMULTYPE_TRAP_UD); |
7aa81cc0 | 1237 | if (er != EMULATE_DONE) |
7ee5d940 | 1238 | kvm_queue_exception(&svm->vcpu, UD_VECTOR); |
7aa81cc0 AL |
1239 | return 1; |
1240 | } | |
1241 | ||
851ba692 | 1242 | static int nm_interception(struct vcpu_svm *svm) |
7807fa6c | 1243 | { |
a2fa3e9f | 1244 | svm->vmcb->control.intercept_exceptions &= ~(1 << NM_VECTOR); |
4d4ec087 | 1245 | if (!kvm_read_cr0_bits(&svm->vcpu, X86_CR0_TS)) |
a2fa3e9f | 1246 | svm->vmcb->save.cr0 &= ~X86_CR0_TS; |
02daab21 AK |
1247 | else |
1248 | svm->vmcb->save.cr0 |= X86_CR0_TS; | |
e756fc62 | 1249 | svm->vcpu.fpu_active = 1; |
a2fa3e9f GH |
1250 | |
1251 | return 1; | |
7807fa6c AL |
1252 | } |
1253 | ||
851ba692 | 1254 | static int mc_interception(struct vcpu_svm *svm) |
53371b50 JR |
1255 | { |
1256 | /* | |
1257 | * On an #MC intercept the MCE handler is not called automatically in | |
1258 | * the host. So do it by hand here. | |
1259 | */ | |
1260 | asm volatile ( | |
1261 | "int $0x12\n"); | |
1262 | /* not sure if we ever come back to this point */ | |
1263 | ||
1264 | return 1; | |
1265 | } | |
1266 | ||
851ba692 | 1267 | static int shutdown_interception(struct vcpu_svm *svm) |
46fe4ddd | 1268 | { |
851ba692 AK |
1269 | struct kvm_run *kvm_run = svm->vcpu.run; |
1270 | ||
46fe4ddd JR |
1271 | /* |
1272 | * VMCB is undefined after a SHUTDOWN intercept | |
1273 | * so reinitialize it. | |
1274 | */ | |
a2fa3e9f | 1275 | clear_page(svm->vmcb); |
e6101a96 | 1276 | init_vmcb(svm); |
46fe4ddd JR |
1277 | |
1278 | kvm_run->exit_reason = KVM_EXIT_SHUTDOWN; | |
1279 | return 0; | |
1280 | } | |
1281 | ||
851ba692 | 1282 | static int io_interception(struct vcpu_svm *svm) |
6aa8b732 | 1283 | { |
d77c26fc | 1284 | u32 io_info = svm->vmcb->control.exit_info_1; /* address size bug? */ |
34c33d16 | 1285 | int size, in, string; |
039576c0 | 1286 | unsigned port; |
6aa8b732 | 1287 | |
e756fc62 | 1288 | ++svm->vcpu.stat.io_exits; |
6aa8b732 | 1289 | |
a2fa3e9f | 1290 | svm->next_rip = svm->vmcb->control.exit_info_2; |
6aa8b732 | 1291 | |
e70669ab LV |
1292 | string = (io_info & SVM_IOIO_STR_MASK) != 0; |
1293 | ||
1294 | if (string) { | |
3427318f | 1295 | if (emulate_instruction(&svm->vcpu, |
851ba692 | 1296 | 0, 0, 0) == EMULATE_DO_MMIO) |
e70669ab LV |
1297 | return 0; |
1298 | return 1; | |
1299 | } | |
1300 | ||
039576c0 AK |
1301 | in = (io_info & SVM_IOIO_TYPE_MASK) != 0; |
1302 | port = io_info >> 16; | |
1303 | size = (io_info & SVM_IOIO_SIZE_MASK) >> SVM_IOIO_SIZE_SHIFT; | |
6aa8b732 | 1304 | |
e93f36bc | 1305 | skip_emulated_instruction(&svm->vcpu); |
851ba692 | 1306 | return kvm_emulate_pio(&svm->vcpu, in, size, port); |
6aa8b732 AK |
1307 | } |
1308 | ||
851ba692 | 1309 | static int nmi_interception(struct vcpu_svm *svm) |
c47f098d JR |
1310 | { |
1311 | return 1; | |
1312 | } | |
1313 | ||
851ba692 | 1314 | static int intr_interception(struct vcpu_svm *svm) |
a0698055 JR |
1315 | { |
1316 | ++svm->vcpu.stat.irq_exits; | |
1317 | return 1; | |
1318 | } | |
1319 | ||
851ba692 | 1320 | static int nop_on_interception(struct vcpu_svm *svm) |
6aa8b732 AK |
1321 | { |
1322 | return 1; | |
1323 | } | |
1324 | ||
851ba692 | 1325 | static int halt_interception(struct vcpu_svm *svm) |
6aa8b732 | 1326 | { |
5fdbf976 | 1327 | svm->next_rip = kvm_rip_read(&svm->vcpu) + 1; |
e756fc62 RR |
1328 | skip_emulated_instruction(&svm->vcpu); |
1329 | return kvm_emulate_halt(&svm->vcpu); | |
6aa8b732 AK |
1330 | } |
1331 | ||
851ba692 | 1332 | static int vmmcall_interception(struct vcpu_svm *svm) |
02e235bc | 1333 | { |
5fdbf976 | 1334 | svm->next_rip = kvm_rip_read(&svm->vcpu) + 3; |
e756fc62 | 1335 | skip_emulated_instruction(&svm->vcpu); |
7aa81cc0 AL |
1336 | kvm_emulate_hypercall(&svm->vcpu); |
1337 | return 1; | |
02e235bc AK |
1338 | } |
1339 | ||
c0725420 AG |
1340 | static int nested_svm_check_permissions(struct vcpu_svm *svm) |
1341 | { | |
1342 | if (!(svm->vcpu.arch.shadow_efer & EFER_SVME) | |
1343 | || !is_paging(&svm->vcpu)) { | |
1344 | kvm_queue_exception(&svm->vcpu, UD_VECTOR); | |
1345 | return 1; | |
1346 | } | |
1347 | ||
1348 | if (svm->vmcb->save.cpl) { | |
1349 | kvm_inject_gp(&svm->vcpu, 0); | |
1350 | return 1; | |
1351 | } | |
1352 | ||
1353 | return 0; | |
1354 | } | |
1355 | ||
cf74a78b AG |
1356 | static int nested_svm_check_exception(struct vcpu_svm *svm, unsigned nr, |
1357 | bool has_error_code, u32 error_code) | |
1358 | { | |
0295ad7d JR |
1359 | if (!is_nested(svm)) |
1360 | return 0; | |
cf74a78b | 1361 | |
0295ad7d JR |
1362 | svm->vmcb->control.exit_code = SVM_EXIT_EXCP_BASE + nr; |
1363 | svm->vmcb->control.exit_code_hi = 0; | |
1364 | svm->vmcb->control.exit_info_1 = error_code; | |
1365 | svm->vmcb->control.exit_info_2 = svm->vcpu.arch.cr2; | |
1366 | ||
410e4d57 | 1367 | return nested_svm_exit_handled(svm); |
cf74a78b AG |
1368 | } |
1369 | ||
1370 | static inline int nested_svm_intr(struct vcpu_svm *svm) | |
1371 | { | |
26666957 JR |
1372 | if (!is_nested(svm)) |
1373 | return 0; | |
cf74a78b | 1374 | |
26666957 JR |
1375 | if (!(svm->vcpu.arch.hflags & HF_VINTR_MASK)) |
1376 | return 0; | |
cf74a78b | 1377 | |
26666957 JR |
1378 | if (!(svm->vcpu.arch.hflags & HF_HIF_MASK)) |
1379 | return 0; | |
cf74a78b | 1380 | |
26666957 JR |
1381 | svm->vmcb->control.exit_code = SVM_EXIT_INTR; |
1382 | ||
cd3ff653 JR |
1383 | if (svm->nested.intercept & 1ULL) { |
1384 | /* | |
1385 | * The #vmexit can't be emulated here directly because this | |
1386 | * code path runs with irqs and preemtion disabled. A | |
1387 | * #vmexit emulation might sleep. Only signal request for | |
1388 | * the #vmexit here. | |
1389 | */ | |
1390 | svm->nested.exit_required = true; | |
236649de | 1391 | trace_kvm_nested_intr_vmexit(svm->vmcb->save.rip); |
26666957 | 1392 | return 1; |
cf74a78b AG |
1393 | } |
1394 | ||
1395 | return 0; | |
1396 | } | |
1397 | ||
34f80cfa JR |
1398 | static void *nested_svm_map(struct vcpu_svm *svm, u64 gpa, enum km_type idx) |
1399 | { | |
1400 | struct page *page; | |
1401 | ||
34f80cfa | 1402 | page = gfn_to_page(svm->vcpu.kvm, gpa >> PAGE_SHIFT); |
34f80cfa JR |
1403 | if (is_error_page(page)) |
1404 | goto error; | |
1405 | ||
1406 | return kmap_atomic(page, idx); | |
1407 | ||
1408 | error: | |
1409 | kvm_release_page_clean(page); | |
1410 | kvm_inject_gp(&svm->vcpu, 0); | |
1411 | ||
1412 | return NULL; | |
1413 | } | |
1414 | ||
1415 | static void nested_svm_unmap(void *addr, enum km_type idx) | |
1416 | { | |
1417 | struct page *page; | |
1418 | ||
1419 | if (!addr) | |
1420 | return; | |
1421 | ||
1422 | page = kmap_atomic_to_page(addr); | |
1423 | ||
1424 | kunmap_atomic(addr, idx); | |
1425 | kvm_release_page_dirty(page); | |
1426 | } | |
1427 | ||
3d62d9aa | 1428 | static bool nested_svm_exit_handled_msr(struct vcpu_svm *svm) |
4c2161ae | 1429 | { |
4c2161ae | 1430 | u32 param = svm->vmcb->control.exit_info_1 & 1; |
3d62d9aa JR |
1431 | u32 msr = svm->vcpu.arch.regs[VCPU_REGS_RCX]; |
1432 | bool ret = false; | |
1433 | u32 t0, t1; | |
1434 | u8 *msrpm; | |
4c2161ae | 1435 | |
3d62d9aa JR |
1436 | if (!(svm->nested.intercept & (1ULL << INTERCEPT_MSR_PROT))) |
1437 | return false; | |
1438 | ||
1439 | msrpm = nested_svm_map(svm, svm->nested.vmcb_msrpm, KM_USER0); | |
1440 | ||
1441 | if (!msrpm) | |
1442 | goto out; | |
4c2161ae JR |
1443 | |
1444 | switch (msr) { | |
1445 | case 0 ... 0x1fff: | |
1446 | t0 = (msr * 2) % 8; | |
1447 | t1 = msr / 8; | |
1448 | break; | |
1449 | case 0xc0000000 ... 0xc0001fff: | |
1450 | t0 = (8192 + msr - 0xc0000000) * 2; | |
1451 | t1 = (t0 / 8); | |
1452 | t0 %= 8; | |
1453 | break; | |
1454 | case 0xc0010000 ... 0xc0011fff: | |
1455 | t0 = (16384 + msr - 0xc0010000) * 2; | |
1456 | t1 = (t0 / 8); | |
1457 | t0 %= 8; | |
1458 | break; | |
1459 | default: | |
3d62d9aa JR |
1460 | ret = true; |
1461 | goto out; | |
4c2161ae | 1462 | } |
4c2161ae | 1463 | |
3d62d9aa JR |
1464 | ret = msrpm[t1] & ((1 << param) << t0); |
1465 | ||
1466 | out: | |
1467 | nested_svm_unmap(msrpm, KM_USER0); | |
1468 | ||
1469 | return ret; | |
4c2161ae JR |
1470 | } |
1471 | ||
410e4d57 | 1472 | static int nested_svm_exit_special(struct vcpu_svm *svm) |
cf74a78b | 1473 | { |
cf74a78b | 1474 | u32 exit_code = svm->vmcb->control.exit_code; |
4c2161ae | 1475 | |
410e4d57 JR |
1476 | switch (exit_code) { |
1477 | case SVM_EXIT_INTR: | |
1478 | case SVM_EXIT_NMI: | |
1479 | return NESTED_EXIT_HOST; | |
cf74a78b | 1480 | /* For now we are always handling NPFs when using them */ |
410e4d57 JR |
1481 | case SVM_EXIT_NPF: |
1482 | if (npt_enabled) | |
1483 | return NESTED_EXIT_HOST; | |
1484 | break; | |
1485 | /* When we're shadowing, trap PFs */ | |
1486 | case SVM_EXIT_EXCP_BASE + PF_VECTOR: | |
1487 | if (!npt_enabled) | |
1488 | return NESTED_EXIT_HOST; | |
1489 | break; | |
1490 | default: | |
1491 | break; | |
cf74a78b AG |
1492 | } |
1493 | ||
410e4d57 JR |
1494 | return NESTED_EXIT_CONTINUE; |
1495 | } | |
1496 | ||
1497 | /* | |
1498 | * If this function returns true, this #vmexit was already handled | |
1499 | */ | |
1500 | static int nested_svm_exit_handled(struct vcpu_svm *svm) | |
1501 | { | |
1502 | u32 exit_code = svm->vmcb->control.exit_code; | |
1503 | int vmexit = NESTED_EXIT_HOST; | |
1504 | ||
cf74a78b | 1505 | switch (exit_code) { |
9c4e40b9 | 1506 | case SVM_EXIT_MSR: |
3d62d9aa | 1507 | vmexit = nested_svm_exit_handled_msr(svm); |
9c4e40b9 | 1508 | break; |
cf74a78b AG |
1509 | case SVM_EXIT_READ_CR0 ... SVM_EXIT_READ_CR8: { |
1510 | u32 cr_bits = 1 << (exit_code - SVM_EXIT_READ_CR0); | |
aad42c64 | 1511 | if (svm->nested.intercept_cr_read & cr_bits) |
410e4d57 | 1512 | vmexit = NESTED_EXIT_DONE; |
cf74a78b AG |
1513 | break; |
1514 | } | |
1515 | case SVM_EXIT_WRITE_CR0 ... SVM_EXIT_WRITE_CR8: { | |
1516 | u32 cr_bits = 1 << (exit_code - SVM_EXIT_WRITE_CR0); | |
aad42c64 | 1517 | if (svm->nested.intercept_cr_write & cr_bits) |
410e4d57 | 1518 | vmexit = NESTED_EXIT_DONE; |
cf74a78b AG |
1519 | break; |
1520 | } | |
1521 | case SVM_EXIT_READ_DR0 ... SVM_EXIT_READ_DR7: { | |
1522 | u32 dr_bits = 1 << (exit_code - SVM_EXIT_READ_DR0); | |
aad42c64 | 1523 | if (svm->nested.intercept_dr_read & dr_bits) |
410e4d57 | 1524 | vmexit = NESTED_EXIT_DONE; |
cf74a78b AG |
1525 | break; |
1526 | } | |
1527 | case SVM_EXIT_WRITE_DR0 ... SVM_EXIT_WRITE_DR7: { | |
1528 | u32 dr_bits = 1 << (exit_code - SVM_EXIT_WRITE_DR0); | |
aad42c64 | 1529 | if (svm->nested.intercept_dr_write & dr_bits) |
410e4d57 | 1530 | vmexit = NESTED_EXIT_DONE; |
cf74a78b AG |
1531 | break; |
1532 | } | |
1533 | case SVM_EXIT_EXCP_BASE ... SVM_EXIT_EXCP_BASE + 0x1f: { | |
1534 | u32 excp_bits = 1 << (exit_code - SVM_EXIT_EXCP_BASE); | |
aad42c64 | 1535 | if (svm->nested.intercept_exceptions & excp_bits) |
410e4d57 | 1536 | vmexit = NESTED_EXIT_DONE; |
cf74a78b AG |
1537 | break; |
1538 | } | |
1539 | default: { | |
1540 | u64 exit_bits = 1ULL << (exit_code - SVM_EXIT_INTR); | |
aad42c64 | 1541 | if (svm->nested.intercept & exit_bits) |
410e4d57 | 1542 | vmexit = NESTED_EXIT_DONE; |
cf74a78b AG |
1543 | } |
1544 | } | |
1545 | ||
410e4d57 | 1546 | if (vmexit == NESTED_EXIT_DONE) { |
9c4e40b9 JR |
1547 | nested_svm_vmexit(svm); |
1548 | } | |
1549 | ||
1550 | return vmexit; | |
cf74a78b AG |
1551 | } |
1552 | ||
0460a979 JR |
1553 | static inline void copy_vmcb_control_area(struct vmcb *dst_vmcb, struct vmcb *from_vmcb) |
1554 | { | |
1555 | struct vmcb_control_area *dst = &dst_vmcb->control; | |
1556 | struct vmcb_control_area *from = &from_vmcb->control; | |
1557 | ||
1558 | dst->intercept_cr_read = from->intercept_cr_read; | |
1559 | dst->intercept_cr_write = from->intercept_cr_write; | |
1560 | dst->intercept_dr_read = from->intercept_dr_read; | |
1561 | dst->intercept_dr_write = from->intercept_dr_write; | |
1562 | dst->intercept_exceptions = from->intercept_exceptions; | |
1563 | dst->intercept = from->intercept; | |
1564 | dst->iopm_base_pa = from->iopm_base_pa; | |
1565 | dst->msrpm_base_pa = from->msrpm_base_pa; | |
1566 | dst->tsc_offset = from->tsc_offset; | |
1567 | dst->asid = from->asid; | |
1568 | dst->tlb_ctl = from->tlb_ctl; | |
1569 | dst->int_ctl = from->int_ctl; | |
1570 | dst->int_vector = from->int_vector; | |
1571 | dst->int_state = from->int_state; | |
1572 | dst->exit_code = from->exit_code; | |
1573 | dst->exit_code_hi = from->exit_code_hi; | |
1574 | dst->exit_info_1 = from->exit_info_1; | |
1575 | dst->exit_info_2 = from->exit_info_2; | |
1576 | dst->exit_int_info = from->exit_int_info; | |
1577 | dst->exit_int_info_err = from->exit_int_info_err; | |
1578 | dst->nested_ctl = from->nested_ctl; | |
1579 | dst->event_inj = from->event_inj; | |
1580 | dst->event_inj_err = from->event_inj_err; | |
1581 | dst->nested_cr3 = from->nested_cr3; | |
1582 | dst->lbr_ctl = from->lbr_ctl; | |
1583 | } | |
1584 | ||
34f80cfa | 1585 | static int nested_svm_vmexit(struct vcpu_svm *svm) |
cf74a78b | 1586 | { |
34f80cfa | 1587 | struct vmcb *nested_vmcb; |
e6aa9abd | 1588 | struct vmcb *hsave = svm->nested.hsave; |
33740e40 | 1589 | struct vmcb *vmcb = svm->vmcb; |
cf74a78b | 1590 | |
17897f36 JR |
1591 | trace_kvm_nested_vmexit_inject(vmcb->control.exit_code, |
1592 | vmcb->control.exit_info_1, | |
1593 | vmcb->control.exit_info_2, | |
1594 | vmcb->control.exit_int_info, | |
1595 | vmcb->control.exit_int_info_err); | |
1596 | ||
34f80cfa JR |
1597 | nested_vmcb = nested_svm_map(svm, svm->nested.vmcb, KM_USER0); |
1598 | if (!nested_vmcb) | |
1599 | return 1; | |
1600 | ||
cf74a78b | 1601 | /* Give the current vmcb to the guest */ |
33740e40 JR |
1602 | disable_gif(svm); |
1603 | ||
1604 | nested_vmcb->save.es = vmcb->save.es; | |
1605 | nested_vmcb->save.cs = vmcb->save.cs; | |
1606 | nested_vmcb->save.ss = vmcb->save.ss; | |
1607 | nested_vmcb->save.ds = vmcb->save.ds; | |
1608 | nested_vmcb->save.gdtr = vmcb->save.gdtr; | |
1609 | nested_vmcb->save.idtr = vmcb->save.idtr; | |
1610 | if (npt_enabled) | |
1611 | nested_vmcb->save.cr3 = vmcb->save.cr3; | |
1612 | nested_vmcb->save.cr2 = vmcb->save.cr2; | |
1613 | nested_vmcb->save.rflags = vmcb->save.rflags; | |
1614 | nested_vmcb->save.rip = vmcb->save.rip; | |
1615 | nested_vmcb->save.rsp = vmcb->save.rsp; | |
1616 | nested_vmcb->save.rax = vmcb->save.rax; | |
1617 | nested_vmcb->save.dr7 = vmcb->save.dr7; | |
1618 | nested_vmcb->save.dr6 = vmcb->save.dr6; | |
1619 | nested_vmcb->save.cpl = vmcb->save.cpl; | |
1620 | ||
1621 | nested_vmcb->control.int_ctl = vmcb->control.int_ctl; | |
1622 | nested_vmcb->control.int_vector = vmcb->control.int_vector; | |
1623 | nested_vmcb->control.int_state = vmcb->control.int_state; | |
1624 | nested_vmcb->control.exit_code = vmcb->control.exit_code; | |
1625 | nested_vmcb->control.exit_code_hi = vmcb->control.exit_code_hi; | |
1626 | nested_vmcb->control.exit_info_1 = vmcb->control.exit_info_1; | |
1627 | nested_vmcb->control.exit_info_2 = vmcb->control.exit_info_2; | |
1628 | nested_vmcb->control.exit_int_info = vmcb->control.exit_int_info; | |
1629 | nested_vmcb->control.exit_int_info_err = vmcb->control.exit_int_info_err; | |
8d23c466 AG |
1630 | |
1631 | /* | |
1632 | * If we emulate a VMRUN/#VMEXIT in the same host #vmexit cycle we have | |
1633 | * to make sure that we do not lose injected events. So check event_inj | |
1634 | * here and copy it to exit_int_info if it is valid. | |
1635 | * Exit_int_info and event_inj can't be both valid because the case | |
1636 | * below only happens on a VMRUN instruction intercept which has | |
1637 | * no valid exit_int_info set. | |
1638 | */ | |
1639 | if (vmcb->control.event_inj & SVM_EVTINJ_VALID) { | |
1640 | struct vmcb_control_area *nc = &nested_vmcb->control; | |
1641 | ||
1642 | nc->exit_int_info = vmcb->control.event_inj; | |
1643 | nc->exit_int_info_err = vmcb->control.event_inj_err; | |
1644 | } | |
1645 | ||
33740e40 JR |
1646 | nested_vmcb->control.tlb_ctl = 0; |
1647 | nested_vmcb->control.event_inj = 0; | |
1648 | nested_vmcb->control.event_inj_err = 0; | |
cf74a78b AG |
1649 | |
1650 | /* We always set V_INTR_MASKING and remember the old value in hflags */ | |
1651 | if (!(svm->vcpu.arch.hflags & HF_VINTR_MASK)) | |
1652 | nested_vmcb->control.int_ctl &= ~V_INTR_MASKING_MASK; | |
1653 | ||
cf74a78b | 1654 | /* Restore the original control entries */ |
0460a979 | 1655 | copy_vmcb_control_area(vmcb, hsave); |
cf74a78b | 1656 | |
219b65dc AG |
1657 | kvm_clear_exception_queue(&svm->vcpu); |
1658 | kvm_clear_interrupt_queue(&svm->vcpu); | |
cf74a78b AG |
1659 | |
1660 | /* Restore selected save entries */ | |
1661 | svm->vmcb->save.es = hsave->save.es; | |
1662 | svm->vmcb->save.cs = hsave->save.cs; | |
1663 | svm->vmcb->save.ss = hsave->save.ss; | |
1664 | svm->vmcb->save.ds = hsave->save.ds; | |
1665 | svm->vmcb->save.gdtr = hsave->save.gdtr; | |
1666 | svm->vmcb->save.idtr = hsave->save.idtr; | |
1667 | svm->vmcb->save.rflags = hsave->save.rflags; | |
1668 | svm_set_efer(&svm->vcpu, hsave->save.efer); | |
1669 | svm_set_cr0(&svm->vcpu, hsave->save.cr0 | X86_CR0_PE); | |
1670 | svm_set_cr4(&svm->vcpu, hsave->save.cr4); | |
1671 | if (npt_enabled) { | |
1672 | svm->vmcb->save.cr3 = hsave->save.cr3; | |
1673 | svm->vcpu.arch.cr3 = hsave->save.cr3; | |
1674 | } else { | |
1675 | kvm_set_cr3(&svm->vcpu, hsave->save.cr3); | |
1676 | } | |
1677 | kvm_register_write(&svm->vcpu, VCPU_REGS_RAX, hsave->save.rax); | |
1678 | kvm_register_write(&svm->vcpu, VCPU_REGS_RSP, hsave->save.rsp); | |
1679 | kvm_register_write(&svm->vcpu, VCPU_REGS_RIP, hsave->save.rip); | |
1680 | svm->vmcb->save.dr7 = 0; | |
1681 | svm->vmcb->save.cpl = 0; | |
1682 | svm->vmcb->control.exit_int_info = 0; | |
1683 | ||
cf74a78b | 1684 | /* Exit nested SVM mode */ |
e6aa9abd | 1685 | svm->nested.vmcb = 0; |
cf74a78b | 1686 | |
34f80cfa | 1687 | nested_svm_unmap(nested_vmcb, KM_USER0); |
cf74a78b AG |
1688 | |
1689 | kvm_mmu_reset_context(&svm->vcpu); | |
1690 | kvm_mmu_load(&svm->vcpu); | |
1691 | ||
1692 | return 0; | |
1693 | } | |
3d6368ef | 1694 | |
9738b2c9 | 1695 | static bool nested_svm_vmrun_msrpm(struct vcpu_svm *svm) |
3d6368ef | 1696 | { |
9738b2c9 | 1697 | u32 *nested_msrpm; |
3d6368ef | 1698 | int i; |
9738b2c9 JR |
1699 | |
1700 | nested_msrpm = nested_svm_map(svm, svm->nested.vmcb_msrpm, KM_USER0); | |
1701 | if (!nested_msrpm) | |
1702 | return false; | |
1703 | ||
3d6368ef | 1704 | for (i=0; i< PAGE_SIZE * (1 << MSRPM_ALLOC_ORDER) / 4; i++) |
e6aa9abd | 1705 | svm->nested.msrpm[i] = svm->msrpm[i] | nested_msrpm[i]; |
9738b2c9 | 1706 | |
e6aa9abd | 1707 | svm->vmcb->control.msrpm_base_pa = __pa(svm->nested.msrpm); |
3d6368ef | 1708 | |
9738b2c9 JR |
1709 | nested_svm_unmap(nested_msrpm, KM_USER0); |
1710 | ||
1711 | return true; | |
3d6368ef AG |
1712 | } |
1713 | ||
9738b2c9 | 1714 | static bool nested_svm_vmrun(struct vcpu_svm *svm) |
3d6368ef | 1715 | { |
9738b2c9 | 1716 | struct vmcb *nested_vmcb; |
e6aa9abd | 1717 | struct vmcb *hsave = svm->nested.hsave; |
defbba56 | 1718 | struct vmcb *vmcb = svm->vmcb; |
3d6368ef | 1719 | |
9738b2c9 JR |
1720 | nested_vmcb = nested_svm_map(svm, svm->vmcb->save.rax, KM_USER0); |
1721 | if (!nested_vmcb) | |
1722 | return false; | |
1723 | ||
3d6368ef | 1724 | /* nested_vmcb is our indicator if nested SVM is activated */ |
e6aa9abd | 1725 | svm->nested.vmcb = svm->vmcb->save.rax; |
3d6368ef | 1726 | |
0ac406de JR |
1727 | trace_kvm_nested_vmrun(svm->vmcb->save.rip - 3, svm->nested.vmcb, |
1728 | nested_vmcb->save.rip, | |
1729 | nested_vmcb->control.int_ctl, | |
1730 | nested_vmcb->control.event_inj, | |
1731 | nested_vmcb->control.nested_ctl); | |
1732 | ||
3d6368ef | 1733 | /* Clear internal status */ |
219b65dc AG |
1734 | kvm_clear_exception_queue(&svm->vcpu); |
1735 | kvm_clear_interrupt_queue(&svm->vcpu); | |
3d6368ef AG |
1736 | |
1737 | /* Save the old vmcb, so we don't need to pick what we save, but | |
1738 | can restore everything when a VMEXIT occurs */ | |
defbba56 JR |
1739 | hsave->save.es = vmcb->save.es; |
1740 | hsave->save.cs = vmcb->save.cs; | |
1741 | hsave->save.ss = vmcb->save.ss; | |
1742 | hsave->save.ds = vmcb->save.ds; | |
1743 | hsave->save.gdtr = vmcb->save.gdtr; | |
1744 | hsave->save.idtr = vmcb->save.idtr; | |
1745 | hsave->save.efer = svm->vcpu.arch.shadow_efer; | |
4d4ec087 | 1746 | hsave->save.cr0 = kvm_read_cr0(&svm->vcpu); |
defbba56 JR |
1747 | hsave->save.cr4 = svm->vcpu.arch.cr4; |
1748 | hsave->save.rflags = vmcb->save.rflags; | |
1749 | hsave->save.rip = svm->next_rip; | |
1750 | hsave->save.rsp = vmcb->save.rsp; | |
1751 | hsave->save.rax = vmcb->save.rax; | |
1752 | if (npt_enabled) | |
1753 | hsave->save.cr3 = vmcb->save.cr3; | |
1754 | else | |
1755 | hsave->save.cr3 = svm->vcpu.arch.cr3; | |
1756 | ||
0460a979 | 1757 | copy_vmcb_control_area(hsave, vmcb); |
3d6368ef AG |
1758 | |
1759 | if (svm->vmcb->save.rflags & X86_EFLAGS_IF) | |
1760 | svm->vcpu.arch.hflags |= HF_HIF_MASK; | |
1761 | else | |
1762 | svm->vcpu.arch.hflags &= ~HF_HIF_MASK; | |
1763 | ||
1764 | /* Load the nested guest state */ | |
1765 | svm->vmcb->save.es = nested_vmcb->save.es; | |
1766 | svm->vmcb->save.cs = nested_vmcb->save.cs; | |
1767 | svm->vmcb->save.ss = nested_vmcb->save.ss; | |
1768 | svm->vmcb->save.ds = nested_vmcb->save.ds; | |
1769 | svm->vmcb->save.gdtr = nested_vmcb->save.gdtr; | |
1770 | svm->vmcb->save.idtr = nested_vmcb->save.idtr; | |
1771 | svm->vmcb->save.rflags = nested_vmcb->save.rflags; | |
1772 | svm_set_efer(&svm->vcpu, nested_vmcb->save.efer); | |
1773 | svm_set_cr0(&svm->vcpu, nested_vmcb->save.cr0); | |
1774 | svm_set_cr4(&svm->vcpu, nested_vmcb->save.cr4); | |
1775 | if (npt_enabled) { | |
1776 | svm->vmcb->save.cr3 = nested_vmcb->save.cr3; | |
1777 | svm->vcpu.arch.cr3 = nested_vmcb->save.cr3; | |
1778 | } else { | |
1779 | kvm_set_cr3(&svm->vcpu, nested_vmcb->save.cr3); | |
1780 | kvm_mmu_reset_context(&svm->vcpu); | |
1781 | } | |
defbba56 | 1782 | svm->vmcb->save.cr2 = svm->vcpu.arch.cr2 = nested_vmcb->save.cr2; |
3d6368ef AG |
1783 | kvm_register_write(&svm->vcpu, VCPU_REGS_RAX, nested_vmcb->save.rax); |
1784 | kvm_register_write(&svm->vcpu, VCPU_REGS_RSP, nested_vmcb->save.rsp); | |
1785 | kvm_register_write(&svm->vcpu, VCPU_REGS_RIP, nested_vmcb->save.rip); | |
1786 | /* In case we don't even reach vcpu_run, the fields are not updated */ | |
1787 | svm->vmcb->save.rax = nested_vmcb->save.rax; | |
1788 | svm->vmcb->save.rsp = nested_vmcb->save.rsp; | |
1789 | svm->vmcb->save.rip = nested_vmcb->save.rip; | |
1790 | svm->vmcb->save.dr7 = nested_vmcb->save.dr7; | |
1791 | svm->vmcb->save.dr6 = nested_vmcb->save.dr6; | |
1792 | svm->vmcb->save.cpl = nested_vmcb->save.cpl; | |
1793 | ||
1794 | /* We don't want a nested guest to be more powerful than the guest, | |
1795 | so all intercepts are ORed */ | |
1796 | svm->vmcb->control.intercept_cr_read |= | |
1797 | nested_vmcb->control.intercept_cr_read; | |
1798 | svm->vmcb->control.intercept_cr_write |= | |
1799 | nested_vmcb->control.intercept_cr_write; | |
1800 | svm->vmcb->control.intercept_dr_read |= | |
1801 | nested_vmcb->control.intercept_dr_read; | |
1802 | svm->vmcb->control.intercept_dr_write |= | |
1803 | nested_vmcb->control.intercept_dr_write; | |
1804 | svm->vmcb->control.intercept_exceptions |= | |
1805 | nested_vmcb->control.intercept_exceptions; | |
1806 | ||
1807 | svm->vmcb->control.intercept |= nested_vmcb->control.intercept; | |
1808 | ||
e6aa9abd | 1809 | svm->nested.vmcb_msrpm = nested_vmcb->control.msrpm_base_pa; |
3d6368ef | 1810 | |
aad42c64 JR |
1811 | /* cache intercepts */ |
1812 | svm->nested.intercept_cr_read = nested_vmcb->control.intercept_cr_read; | |
1813 | svm->nested.intercept_cr_write = nested_vmcb->control.intercept_cr_write; | |
1814 | svm->nested.intercept_dr_read = nested_vmcb->control.intercept_dr_read; | |
1815 | svm->nested.intercept_dr_write = nested_vmcb->control.intercept_dr_write; | |
1816 | svm->nested.intercept_exceptions = nested_vmcb->control.intercept_exceptions; | |
1817 | svm->nested.intercept = nested_vmcb->control.intercept; | |
1818 | ||
3d6368ef | 1819 | force_new_asid(&svm->vcpu); |
3d6368ef | 1820 | svm->vmcb->control.int_ctl = nested_vmcb->control.int_ctl | V_INTR_MASKING_MASK; |
3d6368ef AG |
1821 | if (nested_vmcb->control.int_ctl & V_INTR_MASKING_MASK) |
1822 | svm->vcpu.arch.hflags |= HF_VINTR_MASK; | |
1823 | else | |
1824 | svm->vcpu.arch.hflags &= ~HF_VINTR_MASK; | |
1825 | ||
3d6368ef AG |
1826 | svm->vmcb->control.int_vector = nested_vmcb->control.int_vector; |
1827 | svm->vmcb->control.int_state = nested_vmcb->control.int_state; | |
1828 | svm->vmcb->control.tsc_offset += nested_vmcb->control.tsc_offset; | |
3d6368ef AG |
1829 | svm->vmcb->control.event_inj = nested_vmcb->control.event_inj; |
1830 | svm->vmcb->control.event_inj_err = nested_vmcb->control.event_inj_err; | |
1831 | ||
9738b2c9 JR |
1832 | nested_svm_unmap(nested_vmcb, KM_USER0); |
1833 | ||
2af9194d | 1834 | enable_gif(svm); |
3d6368ef | 1835 | |
9738b2c9 | 1836 | return true; |
3d6368ef AG |
1837 | } |
1838 | ||
9966bf68 | 1839 | static void nested_svm_vmloadsave(struct vmcb *from_vmcb, struct vmcb *to_vmcb) |
5542675b AG |
1840 | { |
1841 | to_vmcb->save.fs = from_vmcb->save.fs; | |
1842 | to_vmcb->save.gs = from_vmcb->save.gs; | |
1843 | to_vmcb->save.tr = from_vmcb->save.tr; | |
1844 | to_vmcb->save.ldtr = from_vmcb->save.ldtr; | |
1845 | to_vmcb->save.kernel_gs_base = from_vmcb->save.kernel_gs_base; | |
1846 | to_vmcb->save.star = from_vmcb->save.star; | |
1847 | to_vmcb->save.lstar = from_vmcb->save.lstar; | |
1848 | to_vmcb->save.cstar = from_vmcb->save.cstar; | |
1849 | to_vmcb->save.sfmask = from_vmcb->save.sfmask; | |
1850 | to_vmcb->save.sysenter_cs = from_vmcb->save.sysenter_cs; | |
1851 | to_vmcb->save.sysenter_esp = from_vmcb->save.sysenter_esp; | |
1852 | to_vmcb->save.sysenter_eip = from_vmcb->save.sysenter_eip; | |
5542675b AG |
1853 | } |
1854 | ||
851ba692 | 1855 | static int vmload_interception(struct vcpu_svm *svm) |
5542675b | 1856 | { |
9966bf68 JR |
1857 | struct vmcb *nested_vmcb; |
1858 | ||
5542675b AG |
1859 | if (nested_svm_check_permissions(svm)) |
1860 | return 1; | |
1861 | ||
1862 | svm->next_rip = kvm_rip_read(&svm->vcpu) + 3; | |
1863 | skip_emulated_instruction(&svm->vcpu); | |
1864 | ||
9966bf68 JR |
1865 | nested_vmcb = nested_svm_map(svm, svm->vmcb->save.rax, KM_USER0); |
1866 | if (!nested_vmcb) | |
1867 | return 1; | |
1868 | ||
1869 | nested_svm_vmloadsave(nested_vmcb, svm->vmcb); | |
1870 | nested_svm_unmap(nested_vmcb, KM_USER0); | |
5542675b AG |
1871 | |
1872 | return 1; | |
1873 | } | |
1874 | ||
851ba692 | 1875 | static int vmsave_interception(struct vcpu_svm *svm) |
5542675b | 1876 | { |
9966bf68 JR |
1877 | struct vmcb *nested_vmcb; |
1878 | ||
5542675b AG |
1879 | if (nested_svm_check_permissions(svm)) |
1880 | return 1; | |
1881 | ||
1882 | svm->next_rip = kvm_rip_read(&svm->vcpu) + 3; | |
1883 | skip_emulated_instruction(&svm->vcpu); | |
1884 | ||
9966bf68 JR |
1885 | nested_vmcb = nested_svm_map(svm, svm->vmcb->save.rax, KM_USER0); |
1886 | if (!nested_vmcb) | |
1887 | return 1; | |
1888 | ||
1889 | nested_svm_vmloadsave(svm->vmcb, nested_vmcb); | |
1890 | nested_svm_unmap(nested_vmcb, KM_USER0); | |
5542675b AG |
1891 | |
1892 | return 1; | |
1893 | } | |
1894 | ||
851ba692 | 1895 | static int vmrun_interception(struct vcpu_svm *svm) |
3d6368ef | 1896 | { |
3d6368ef AG |
1897 | if (nested_svm_check_permissions(svm)) |
1898 | return 1; | |
1899 | ||
1900 | svm->next_rip = kvm_rip_read(&svm->vcpu) + 3; | |
1901 | skip_emulated_instruction(&svm->vcpu); | |
1902 | ||
9738b2c9 | 1903 | if (!nested_svm_vmrun(svm)) |
3d6368ef AG |
1904 | return 1; |
1905 | ||
9738b2c9 | 1906 | if (!nested_svm_vmrun_msrpm(svm)) |
1f8da478 JR |
1907 | goto failed; |
1908 | ||
1909 | return 1; | |
1910 | ||
1911 | failed: | |
1912 | ||
1913 | svm->vmcb->control.exit_code = SVM_EXIT_ERR; | |
1914 | svm->vmcb->control.exit_code_hi = 0; | |
1915 | svm->vmcb->control.exit_info_1 = 0; | |
1916 | svm->vmcb->control.exit_info_2 = 0; | |
1917 | ||
1918 | nested_svm_vmexit(svm); | |
3d6368ef AG |
1919 | |
1920 | return 1; | |
1921 | } | |
1922 | ||
851ba692 | 1923 | static int stgi_interception(struct vcpu_svm *svm) |
1371d904 AG |
1924 | { |
1925 | if (nested_svm_check_permissions(svm)) | |
1926 | return 1; | |
1927 | ||
1928 | svm->next_rip = kvm_rip_read(&svm->vcpu) + 3; | |
1929 | skip_emulated_instruction(&svm->vcpu); | |
1930 | ||
2af9194d | 1931 | enable_gif(svm); |
1371d904 AG |
1932 | |
1933 | return 1; | |
1934 | } | |
1935 | ||
851ba692 | 1936 | static int clgi_interception(struct vcpu_svm *svm) |
1371d904 AG |
1937 | { |
1938 | if (nested_svm_check_permissions(svm)) | |
1939 | return 1; | |
1940 | ||
1941 | svm->next_rip = kvm_rip_read(&svm->vcpu) + 3; | |
1942 | skip_emulated_instruction(&svm->vcpu); | |
1943 | ||
2af9194d | 1944 | disable_gif(svm); |
1371d904 AG |
1945 | |
1946 | /* After a CLGI no interrupts should come */ | |
1947 | svm_clear_vintr(svm); | |
1948 | svm->vmcb->control.int_ctl &= ~V_IRQ_MASK; | |
1949 | ||
1950 | return 1; | |
1951 | } | |
1952 | ||
851ba692 | 1953 | static int invlpga_interception(struct vcpu_svm *svm) |
ff092385 AG |
1954 | { |
1955 | struct kvm_vcpu *vcpu = &svm->vcpu; | |
ff092385 | 1956 | |
ec1ff790 JR |
1957 | trace_kvm_invlpga(svm->vmcb->save.rip, vcpu->arch.regs[VCPU_REGS_RCX], |
1958 | vcpu->arch.regs[VCPU_REGS_RAX]); | |
1959 | ||
ff092385 AG |
1960 | /* Let's treat INVLPGA the same as INVLPG (can be optimized!) */ |
1961 | kvm_mmu_invlpg(vcpu, vcpu->arch.regs[VCPU_REGS_RAX]); | |
1962 | ||
1963 | svm->next_rip = kvm_rip_read(&svm->vcpu) + 3; | |
1964 | skip_emulated_instruction(&svm->vcpu); | |
1965 | return 1; | |
1966 | } | |
1967 | ||
532a46b9 JR |
1968 | static int skinit_interception(struct vcpu_svm *svm) |
1969 | { | |
1970 | trace_kvm_skinit(svm->vmcb->save.rip, svm->vcpu.arch.regs[VCPU_REGS_RAX]); | |
1971 | ||
1972 | kvm_queue_exception(&svm->vcpu, UD_VECTOR); | |
1973 | return 1; | |
1974 | } | |
1975 | ||
851ba692 | 1976 | static int invalid_op_interception(struct vcpu_svm *svm) |
6aa8b732 | 1977 | { |
7ee5d940 | 1978 | kvm_queue_exception(&svm->vcpu, UD_VECTOR); |
6aa8b732 AK |
1979 | return 1; |
1980 | } | |
1981 | ||
851ba692 | 1982 | static int task_switch_interception(struct vcpu_svm *svm) |
6aa8b732 | 1983 | { |
37817f29 | 1984 | u16 tss_selector; |
64a7ec06 GN |
1985 | int reason; |
1986 | int int_type = svm->vmcb->control.exit_int_info & | |
1987 | SVM_EXITINTINFO_TYPE_MASK; | |
8317c298 | 1988 | int int_vec = svm->vmcb->control.exit_int_info & SVM_EVTINJ_VEC_MASK; |
fe8e7f83 GN |
1989 | uint32_t type = |
1990 | svm->vmcb->control.exit_int_info & SVM_EXITINTINFO_TYPE_MASK; | |
1991 | uint32_t idt_v = | |
1992 | svm->vmcb->control.exit_int_info & SVM_EXITINTINFO_VALID; | |
37817f29 IE |
1993 | |
1994 | tss_selector = (u16)svm->vmcb->control.exit_info_1; | |
64a7ec06 | 1995 | |
37817f29 IE |
1996 | if (svm->vmcb->control.exit_info_2 & |
1997 | (1ULL << SVM_EXITINFOSHIFT_TS_REASON_IRET)) | |
64a7ec06 GN |
1998 | reason = TASK_SWITCH_IRET; |
1999 | else if (svm->vmcb->control.exit_info_2 & | |
2000 | (1ULL << SVM_EXITINFOSHIFT_TS_REASON_JMP)) | |
2001 | reason = TASK_SWITCH_JMP; | |
fe8e7f83 | 2002 | else if (idt_v) |
64a7ec06 GN |
2003 | reason = TASK_SWITCH_GATE; |
2004 | else | |
2005 | reason = TASK_SWITCH_CALL; | |
2006 | ||
fe8e7f83 GN |
2007 | if (reason == TASK_SWITCH_GATE) { |
2008 | switch (type) { | |
2009 | case SVM_EXITINTINFO_TYPE_NMI: | |
2010 | svm->vcpu.arch.nmi_injected = false; | |
2011 | break; | |
2012 | case SVM_EXITINTINFO_TYPE_EXEPT: | |
2013 | kvm_clear_exception_queue(&svm->vcpu); | |
2014 | break; | |
2015 | case SVM_EXITINTINFO_TYPE_INTR: | |
2016 | kvm_clear_interrupt_queue(&svm->vcpu); | |
2017 | break; | |
2018 | default: | |
2019 | break; | |
2020 | } | |
2021 | } | |
64a7ec06 | 2022 | |
8317c298 GN |
2023 | if (reason != TASK_SWITCH_GATE || |
2024 | int_type == SVM_EXITINTINFO_TYPE_SOFT || | |
2025 | (int_type == SVM_EXITINTINFO_TYPE_EXEPT && | |
f629cf84 GN |
2026 | (int_vec == OF_VECTOR || int_vec == BP_VECTOR))) |
2027 | skip_emulated_instruction(&svm->vcpu); | |
64a7ec06 GN |
2028 | |
2029 | return kvm_task_switch(&svm->vcpu, tss_selector, reason); | |
6aa8b732 AK |
2030 | } |
2031 | ||
851ba692 | 2032 | static int cpuid_interception(struct vcpu_svm *svm) |
6aa8b732 | 2033 | { |
5fdbf976 | 2034 | svm->next_rip = kvm_rip_read(&svm->vcpu) + 2; |
e756fc62 | 2035 | kvm_emulate_cpuid(&svm->vcpu); |
06465c5a | 2036 | return 1; |
6aa8b732 AK |
2037 | } |
2038 | ||
851ba692 | 2039 | static int iret_interception(struct vcpu_svm *svm) |
95ba8273 GN |
2040 | { |
2041 | ++svm->vcpu.stat.nmi_window_exits; | |
2042 | svm->vmcb->control.intercept &= ~(1UL << INTERCEPT_IRET); | |
44c11430 | 2043 | svm->vcpu.arch.hflags |= HF_IRET_MASK; |
95ba8273 GN |
2044 | return 1; |
2045 | } | |
2046 | ||
851ba692 | 2047 | static int invlpg_interception(struct vcpu_svm *svm) |
a7052897 | 2048 | { |
851ba692 | 2049 | if (emulate_instruction(&svm->vcpu, 0, 0, 0) != EMULATE_DONE) |
a7052897 MT |
2050 | pr_unimpl(&svm->vcpu, "%s: failed\n", __func__); |
2051 | return 1; | |
2052 | } | |
2053 | ||
851ba692 | 2054 | static int emulate_on_interception(struct vcpu_svm *svm) |
6aa8b732 | 2055 | { |
851ba692 | 2056 | if (emulate_instruction(&svm->vcpu, 0, 0, 0) != EMULATE_DONE) |
b8688d51 | 2057 | pr_unimpl(&svm->vcpu, "%s: failed\n", __func__); |
6aa8b732 AK |
2058 | return 1; |
2059 | } | |
2060 | ||
851ba692 | 2061 | static int cr8_write_interception(struct vcpu_svm *svm) |
1d075434 | 2062 | { |
851ba692 AK |
2063 | struct kvm_run *kvm_run = svm->vcpu.run; |
2064 | ||
0a5fff19 GN |
2065 | u8 cr8_prev = kvm_get_cr8(&svm->vcpu); |
2066 | /* instruction emulation calls kvm_set_cr8() */ | |
851ba692 | 2067 | emulate_instruction(&svm->vcpu, 0, 0, 0); |
95ba8273 GN |
2068 | if (irqchip_in_kernel(svm->vcpu.kvm)) { |
2069 | svm->vmcb->control.intercept_cr_write &= ~INTERCEPT_CR8_MASK; | |
1d075434 | 2070 | return 1; |
95ba8273 | 2071 | } |
0a5fff19 GN |
2072 | if (cr8_prev <= kvm_get_cr8(&svm->vcpu)) |
2073 | return 1; | |
1d075434 JR |
2074 | kvm_run->exit_reason = KVM_EXIT_SET_TPR; |
2075 | return 0; | |
2076 | } | |
2077 | ||
6aa8b732 AK |
2078 | static int svm_get_msr(struct kvm_vcpu *vcpu, unsigned ecx, u64 *data) |
2079 | { | |
a2fa3e9f GH |
2080 | struct vcpu_svm *svm = to_svm(vcpu); |
2081 | ||
6aa8b732 | 2082 | switch (ecx) { |
af24a4e4 | 2083 | case MSR_IA32_TSC: { |
20824f30 | 2084 | u64 tsc_offset; |
6aa8b732 | 2085 | |
20824f30 JR |
2086 | if (is_nested(svm)) |
2087 | tsc_offset = svm->nested.hsave->control.tsc_offset; | |
2088 | else | |
2089 | tsc_offset = svm->vmcb->control.tsc_offset; | |
2090 | ||
2091 | *data = tsc_offset + native_read_tsc(); | |
6aa8b732 AK |
2092 | break; |
2093 | } | |
0e859cac | 2094 | case MSR_K6_STAR: |
a2fa3e9f | 2095 | *data = svm->vmcb->save.star; |
6aa8b732 | 2096 | break; |
0e859cac | 2097 | #ifdef CONFIG_X86_64 |
6aa8b732 | 2098 | case MSR_LSTAR: |
a2fa3e9f | 2099 | *data = svm->vmcb->save.lstar; |
6aa8b732 AK |
2100 | break; |
2101 | case MSR_CSTAR: | |
a2fa3e9f | 2102 | *data = svm->vmcb->save.cstar; |
6aa8b732 AK |
2103 | break; |
2104 | case MSR_KERNEL_GS_BASE: | |
a2fa3e9f | 2105 | *data = svm->vmcb->save.kernel_gs_base; |
6aa8b732 AK |
2106 | break; |
2107 | case MSR_SYSCALL_MASK: | |
a2fa3e9f | 2108 | *data = svm->vmcb->save.sfmask; |
6aa8b732 AK |
2109 | break; |
2110 | #endif | |
2111 | case MSR_IA32_SYSENTER_CS: | |
a2fa3e9f | 2112 | *data = svm->vmcb->save.sysenter_cs; |
6aa8b732 AK |
2113 | break; |
2114 | case MSR_IA32_SYSENTER_EIP: | |
017cb99e | 2115 | *data = svm->sysenter_eip; |
6aa8b732 AK |
2116 | break; |
2117 | case MSR_IA32_SYSENTER_ESP: | |
017cb99e | 2118 | *data = svm->sysenter_esp; |
6aa8b732 | 2119 | break; |
a2938c80 JR |
2120 | /* Nobody will change the following 5 values in the VMCB so |
2121 | we can safely return them on rdmsr. They will always be 0 | |
2122 | until LBRV is implemented. */ | |
2123 | case MSR_IA32_DEBUGCTLMSR: | |
2124 | *data = svm->vmcb->save.dbgctl; | |
2125 | break; | |
2126 | case MSR_IA32_LASTBRANCHFROMIP: | |
2127 | *data = svm->vmcb->save.br_from; | |
2128 | break; | |
2129 | case MSR_IA32_LASTBRANCHTOIP: | |
2130 | *data = svm->vmcb->save.br_to; | |
2131 | break; | |
2132 | case MSR_IA32_LASTINTFROMIP: | |
2133 | *data = svm->vmcb->save.last_excp_from; | |
2134 | break; | |
2135 | case MSR_IA32_LASTINTTOIP: | |
2136 | *data = svm->vmcb->save.last_excp_to; | |
2137 | break; | |
b286d5d8 | 2138 | case MSR_VM_HSAVE_PA: |
e6aa9abd | 2139 | *data = svm->nested.hsave_msr; |
b286d5d8 | 2140 | break; |
eb6f302e JR |
2141 | case MSR_VM_CR: |
2142 | *data = 0; | |
2143 | break; | |
c8a73f18 AG |
2144 | case MSR_IA32_UCODE_REV: |
2145 | *data = 0x01000065; | |
2146 | break; | |
6aa8b732 | 2147 | default: |
3bab1f5d | 2148 | return kvm_get_msr_common(vcpu, ecx, data); |
6aa8b732 AK |
2149 | } |
2150 | return 0; | |
2151 | } | |
2152 | ||
851ba692 | 2153 | static int rdmsr_interception(struct vcpu_svm *svm) |
6aa8b732 | 2154 | { |
ad312c7c | 2155 | u32 ecx = svm->vcpu.arch.regs[VCPU_REGS_RCX]; |
6aa8b732 AK |
2156 | u64 data; |
2157 | ||
e756fc62 | 2158 | if (svm_get_msr(&svm->vcpu, ecx, &data)) |
c1a5d4f9 | 2159 | kvm_inject_gp(&svm->vcpu, 0); |
6aa8b732 | 2160 | else { |
229456fc | 2161 | trace_kvm_msr_read(ecx, data); |
af9ca2d7 | 2162 | |
5fdbf976 | 2163 | svm->vcpu.arch.regs[VCPU_REGS_RAX] = data & 0xffffffff; |
ad312c7c | 2164 | svm->vcpu.arch.regs[VCPU_REGS_RDX] = data >> 32; |
5fdbf976 | 2165 | svm->next_rip = kvm_rip_read(&svm->vcpu) + 2; |
e756fc62 | 2166 | skip_emulated_instruction(&svm->vcpu); |
6aa8b732 AK |
2167 | } |
2168 | return 1; | |
2169 | } | |
2170 | ||
2171 | static int svm_set_msr(struct kvm_vcpu *vcpu, unsigned ecx, u64 data) | |
2172 | { | |
a2fa3e9f GH |
2173 | struct vcpu_svm *svm = to_svm(vcpu); |
2174 | ||
6aa8b732 | 2175 | switch (ecx) { |
af24a4e4 | 2176 | case MSR_IA32_TSC: { |
20824f30 JR |
2177 | u64 tsc_offset = data - native_read_tsc(); |
2178 | u64 g_tsc_offset = 0; | |
2179 | ||
2180 | if (is_nested(svm)) { | |
2181 | g_tsc_offset = svm->vmcb->control.tsc_offset - | |
2182 | svm->nested.hsave->control.tsc_offset; | |
2183 | svm->nested.hsave->control.tsc_offset = tsc_offset; | |
2184 | } | |
2185 | ||
2186 | svm->vmcb->control.tsc_offset = tsc_offset + g_tsc_offset; | |
6aa8b732 | 2187 | |
6aa8b732 AK |
2188 | break; |
2189 | } | |
0e859cac | 2190 | case MSR_K6_STAR: |
a2fa3e9f | 2191 | svm->vmcb->save.star = data; |
6aa8b732 | 2192 | break; |
49b14f24 | 2193 | #ifdef CONFIG_X86_64 |
6aa8b732 | 2194 | case MSR_LSTAR: |
a2fa3e9f | 2195 | svm->vmcb->save.lstar = data; |
6aa8b732 AK |
2196 | break; |
2197 | case MSR_CSTAR: | |
a2fa3e9f | 2198 | svm->vmcb->save.cstar = data; |
6aa8b732 AK |
2199 | break; |
2200 | case MSR_KERNEL_GS_BASE: | |
a2fa3e9f | 2201 | svm->vmcb->save.kernel_gs_base = data; |
6aa8b732 AK |
2202 | break; |
2203 | case MSR_SYSCALL_MASK: | |
a2fa3e9f | 2204 | svm->vmcb->save.sfmask = data; |
6aa8b732 AK |
2205 | break; |
2206 | #endif | |
2207 | case MSR_IA32_SYSENTER_CS: | |
a2fa3e9f | 2208 | svm->vmcb->save.sysenter_cs = data; |
6aa8b732 AK |
2209 | break; |
2210 | case MSR_IA32_SYSENTER_EIP: | |
017cb99e | 2211 | svm->sysenter_eip = data; |
a2fa3e9f | 2212 | svm->vmcb->save.sysenter_eip = data; |
6aa8b732 AK |
2213 | break; |
2214 | case MSR_IA32_SYSENTER_ESP: | |
017cb99e | 2215 | svm->sysenter_esp = data; |
a2fa3e9f | 2216 | svm->vmcb->save.sysenter_esp = data; |
6aa8b732 | 2217 | break; |
a2938c80 | 2218 | case MSR_IA32_DEBUGCTLMSR: |
24e09cbf JR |
2219 | if (!svm_has(SVM_FEATURE_LBRV)) { |
2220 | pr_unimpl(vcpu, "%s: MSR_IA32_DEBUGCTL 0x%llx, nop\n", | |
b8688d51 | 2221 | __func__, data); |
24e09cbf JR |
2222 | break; |
2223 | } | |
2224 | if (data & DEBUGCTL_RESERVED_BITS) | |
2225 | return 1; | |
2226 | ||
2227 | svm->vmcb->save.dbgctl = data; | |
2228 | if (data & (1ULL<<0)) | |
2229 | svm_enable_lbrv(svm); | |
2230 | else | |
2231 | svm_disable_lbrv(svm); | |
a2938c80 | 2232 | break; |
b286d5d8 | 2233 | case MSR_VM_HSAVE_PA: |
e6aa9abd | 2234 | svm->nested.hsave_msr = data; |
62b9abaa | 2235 | break; |
3c5d0a44 AG |
2236 | case MSR_VM_CR: |
2237 | case MSR_VM_IGNNE: | |
3c5d0a44 AG |
2238 | pr_unimpl(vcpu, "unimplemented wrmsr: 0x%x data 0x%llx\n", ecx, data); |
2239 | break; | |
6aa8b732 | 2240 | default: |
3bab1f5d | 2241 | return kvm_set_msr_common(vcpu, ecx, data); |
6aa8b732 AK |
2242 | } |
2243 | return 0; | |
2244 | } | |
2245 | ||
851ba692 | 2246 | static int wrmsr_interception(struct vcpu_svm *svm) |
6aa8b732 | 2247 | { |
ad312c7c | 2248 | u32 ecx = svm->vcpu.arch.regs[VCPU_REGS_RCX]; |
5fdbf976 | 2249 | u64 data = (svm->vcpu.arch.regs[VCPU_REGS_RAX] & -1u) |
ad312c7c | 2250 | | ((u64)(svm->vcpu.arch.regs[VCPU_REGS_RDX] & -1u) << 32); |
af9ca2d7 | 2251 | |
229456fc | 2252 | trace_kvm_msr_write(ecx, data); |
af9ca2d7 | 2253 | |
5fdbf976 | 2254 | svm->next_rip = kvm_rip_read(&svm->vcpu) + 2; |
e756fc62 | 2255 | if (svm_set_msr(&svm->vcpu, ecx, data)) |
c1a5d4f9 | 2256 | kvm_inject_gp(&svm->vcpu, 0); |
6aa8b732 | 2257 | else |
e756fc62 | 2258 | skip_emulated_instruction(&svm->vcpu); |
6aa8b732 AK |
2259 | return 1; |
2260 | } | |
2261 | ||
851ba692 | 2262 | static int msr_interception(struct vcpu_svm *svm) |
6aa8b732 | 2263 | { |
e756fc62 | 2264 | if (svm->vmcb->control.exit_info_1) |
851ba692 | 2265 | return wrmsr_interception(svm); |
6aa8b732 | 2266 | else |
851ba692 | 2267 | return rdmsr_interception(svm); |
6aa8b732 AK |
2268 | } |
2269 | ||
851ba692 | 2270 | static int interrupt_window_interception(struct vcpu_svm *svm) |
c1150d8c | 2271 | { |
851ba692 AK |
2272 | struct kvm_run *kvm_run = svm->vcpu.run; |
2273 | ||
f0b85051 | 2274 | svm_clear_vintr(svm); |
85f455f7 | 2275 | svm->vmcb->control.int_ctl &= ~V_IRQ_MASK; |
c1150d8c DL |
2276 | /* |
2277 | * If the user space waits to inject interrupts, exit as soon as | |
2278 | * possible | |
2279 | */ | |
8061823a GN |
2280 | if (!irqchip_in_kernel(svm->vcpu.kvm) && |
2281 | kvm_run->request_interrupt_window && | |
2282 | !kvm_cpu_has_interrupt(&svm->vcpu)) { | |
e756fc62 | 2283 | ++svm->vcpu.stat.irq_window_exits; |
c1150d8c DL |
2284 | kvm_run->exit_reason = KVM_EXIT_IRQ_WINDOW_OPEN; |
2285 | return 0; | |
2286 | } | |
2287 | ||
2288 | return 1; | |
2289 | } | |
2290 | ||
565d0998 ML |
2291 | static int pause_interception(struct vcpu_svm *svm) |
2292 | { | |
2293 | kvm_vcpu_on_spin(&(svm->vcpu)); | |
2294 | return 1; | |
2295 | } | |
2296 | ||
851ba692 | 2297 | static int (*svm_exit_handlers[])(struct vcpu_svm *svm) = { |
6aa8b732 AK |
2298 | [SVM_EXIT_READ_CR0] = emulate_on_interception, |
2299 | [SVM_EXIT_READ_CR3] = emulate_on_interception, | |
2300 | [SVM_EXIT_READ_CR4] = emulate_on_interception, | |
80a8119c | 2301 | [SVM_EXIT_READ_CR8] = emulate_on_interception, |
6aa8b732 AK |
2302 | /* for now: */ |
2303 | [SVM_EXIT_WRITE_CR0] = emulate_on_interception, | |
2304 | [SVM_EXIT_WRITE_CR3] = emulate_on_interception, | |
2305 | [SVM_EXIT_WRITE_CR4] = emulate_on_interception, | |
1d075434 | 2306 | [SVM_EXIT_WRITE_CR8] = cr8_write_interception, |
6aa8b732 AK |
2307 | [SVM_EXIT_READ_DR0] = emulate_on_interception, |
2308 | [SVM_EXIT_READ_DR1] = emulate_on_interception, | |
2309 | [SVM_EXIT_READ_DR2] = emulate_on_interception, | |
2310 | [SVM_EXIT_READ_DR3] = emulate_on_interception, | |
2311 | [SVM_EXIT_WRITE_DR0] = emulate_on_interception, | |
2312 | [SVM_EXIT_WRITE_DR1] = emulate_on_interception, | |
2313 | [SVM_EXIT_WRITE_DR2] = emulate_on_interception, | |
2314 | [SVM_EXIT_WRITE_DR3] = emulate_on_interception, | |
2315 | [SVM_EXIT_WRITE_DR5] = emulate_on_interception, | |
2316 | [SVM_EXIT_WRITE_DR7] = emulate_on_interception, | |
d0bfb940 JK |
2317 | [SVM_EXIT_EXCP_BASE + DB_VECTOR] = db_interception, |
2318 | [SVM_EXIT_EXCP_BASE + BP_VECTOR] = bp_interception, | |
7aa81cc0 | 2319 | [SVM_EXIT_EXCP_BASE + UD_VECTOR] = ud_interception, |
6aa8b732 | 2320 | [SVM_EXIT_EXCP_BASE + PF_VECTOR] = pf_interception, |
7807fa6c | 2321 | [SVM_EXIT_EXCP_BASE + NM_VECTOR] = nm_interception, |
53371b50 | 2322 | [SVM_EXIT_EXCP_BASE + MC_VECTOR] = mc_interception, |
a0698055 | 2323 | [SVM_EXIT_INTR] = intr_interception, |
c47f098d | 2324 | [SVM_EXIT_NMI] = nmi_interception, |
6aa8b732 AK |
2325 | [SVM_EXIT_SMI] = nop_on_interception, |
2326 | [SVM_EXIT_INIT] = nop_on_interception, | |
c1150d8c | 2327 | [SVM_EXIT_VINTR] = interrupt_window_interception, |
6aa8b732 AK |
2328 | /* [SVM_EXIT_CR0_SEL_WRITE] = emulate_on_interception, */ |
2329 | [SVM_EXIT_CPUID] = cpuid_interception, | |
95ba8273 | 2330 | [SVM_EXIT_IRET] = iret_interception, |
cf5a94d1 | 2331 | [SVM_EXIT_INVD] = emulate_on_interception, |
565d0998 | 2332 | [SVM_EXIT_PAUSE] = pause_interception, |
6aa8b732 | 2333 | [SVM_EXIT_HLT] = halt_interception, |
a7052897 | 2334 | [SVM_EXIT_INVLPG] = invlpg_interception, |
ff092385 | 2335 | [SVM_EXIT_INVLPGA] = invlpga_interception, |
6aa8b732 AK |
2336 | [SVM_EXIT_IOIO] = io_interception, |
2337 | [SVM_EXIT_MSR] = msr_interception, | |
2338 | [SVM_EXIT_TASK_SWITCH] = task_switch_interception, | |
46fe4ddd | 2339 | [SVM_EXIT_SHUTDOWN] = shutdown_interception, |
3d6368ef | 2340 | [SVM_EXIT_VMRUN] = vmrun_interception, |
02e235bc | 2341 | [SVM_EXIT_VMMCALL] = vmmcall_interception, |
5542675b AG |
2342 | [SVM_EXIT_VMLOAD] = vmload_interception, |
2343 | [SVM_EXIT_VMSAVE] = vmsave_interception, | |
1371d904 AG |
2344 | [SVM_EXIT_STGI] = stgi_interception, |
2345 | [SVM_EXIT_CLGI] = clgi_interception, | |
532a46b9 | 2346 | [SVM_EXIT_SKINIT] = skinit_interception, |
cf5a94d1 | 2347 | [SVM_EXIT_WBINVD] = emulate_on_interception, |
916ce236 JR |
2348 | [SVM_EXIT_MONITOR] = invalid_op_interception, |
2349 | [SVM_EXIT_MWAIT] = invalid_op_interception, | |
709ddebf | 2350 | [SVM_EXIT_NPF] = pf_interception, |
6aa8b732 AK |
2351 | }; |
2352 | ||
851ba692 | 2353 | static int handle_exit(struct kvm_vcpu *vcpu) |
6aa8b732 | 2354 | { |
04d2cc77 | 2355 | struct vcpu_svm *svm = to_svm(vcpu); |
851ba692 | 2356 | struct kvm_run *kvm_run = vcpu->run; |
a2fa3e9f | 2357 | u32 exit_code = svm->vmcb->control.exit_code; |
6aa8b732 | 2358 | |
229456fc | 2359 | trace_kvm_exit(exit_code, svm->vmcb->save.rip); |
af9ca2d7 | 2360 | |
cd3ff653 JR |
2361 | if (unlikely(svm->nested.exit_required)) { |
2362 | nested_svm_vmexit(svm); | |
2363 | svm->nested.exit_required = false; | |
2364 | ||
2365 | return 1; | |
2366 | } | |
2367 | ||
cf74a78b | 2368 | if (is_nested(svm)) { |
410e4d57 JR |
2369 | int vmexit; |
2370 | ||
d8cabddf JR |
2371 | trace_kvm_nested_vmexit(svm->vmcb->save.rip, exit_code, |
2372 | svm->vmcb->control.exit_info_1, | |
2373 | svm->vmcb->control.exit_info_2, | |
2374 | svm->vmcb->control.exit_int_info, | |
2375 | svm->vmcb->control.exit_int_info_err); | |
2376 | ||
410e4d57 JR |
2377 | vmexit = nested_svm_exit_special(svm); |
2378 | ||
2379 | if (vmexit == NESTED_EXIT_CONTINUE) | |
2380 | vmexit = nested_svm_exit_handled(svm); | |
2381 | ||
2382 | if (vmexit == NESTED_EXIT_DONE) | |
cf74a78b | 2383 | return 1; |
cf74a78b AG |
2384 | } |
2385 | ||
a5c3832d JR |
2386 | svm_complete_interrupts(svm); |
2387 | ||
709ddebf JR |
2388 | if (npt_enabled) { |
2389 | int mmu_reload = 0; | |
4d4ec087 AK |
2390 | if ((kvm_read_cr0_bits(vcpu, X86_CR0_PG) ^ svm->vmcb->save.cr0) |
2391 | & X86_CR0_PG) { | |
709ddebf JR |
2392 | svm_set_cr0(vcpu, svm->vmcb->save.cr0); |
2393 | mmu_reload = 1; | |
2394 | } | |
2395 | vcpu->arch.cr0 = svm->vmcb->save.cr0; | |
2396 | vcpu->arch.cr3 = svm->vmcb->save.cr3; | |
709ddebf JR |
2397 | if (mmu_reload) { |
2398 | kvm_mmu_reset_context(vcpu); | |
2399 | kvm_mmu_load(vcpu); | |
2400 | } | |
2401 | } | |
2402 | ||
04d2cc77 AK |
2403 | |
2404 | if (svm->vmcb->control.exit_code == SVM_EXIT_ERR) { | |
2405 | kvm_run->exit_reason = KVM_EXIT_FAIL_ENTRY; | |
2406 | kvm_run->fail_entry.hardware_entry_failure_reason | |
2407 | = svm->vmcb->control.exit_code; | |
2408 | return 0; | |
2409 | } | |
2410 | ||
a2fa3e9f | 2411 | if (is_external_interrupt(svm->vmcb->control.exit_int_info) && |
709ddebf | 2412 | exit_code != SVM_EXIT_EXCP_BASE + PF_VECTOR && |
fe8e7f83 | 2413 | exit_code != SVM_EXIT_NPF && exit_code != SVM_EXIT_TASK_SWITCH) |
6aa8b732 AK |
2414 | printk(KERN_ERR "%s: unexpected exit_ini_info 0x%x " |
2415 | "exit_code 0x%x\n", | |
b8688d51 | 2416 | __func__, svm->vmcb->control.exit_int_info, |
6aa8b732 AK |
2417 | exit_code); |
2418 | ||
9d8f549d | 2419 | if (exit_code >= ARRAY_SIZE(svm_exit_handlers) |
56919c5c | 2420 | || !svm_exit_handlers[exit_code]) { |
6aa8b732 | 2421 | kvm_run->exit_reason = KVM_EXIT_UNKNOWN; |
364b625b | 2422 | kvm_run->hw.hardware_exit_reason = exit_code; |
6aa8b732 AK |
2423 | return 0; |
2424 | } | |
2425 | ||
851ba692 | 2426 | return svm_exit_handlers[exit_code](svm); |
6aa8b732 AK |
2427 | } |
2428 | ||
2429 | static void reload_tss(struct kvm_vcpu *vcpu) | |
2430 | { | |
2431 | int cpu = raw_smp_processor_id(); | |
2432 | ||
0fe1e009 TH |
2433 | struct svm_cpu_data *sd = per_cpu(svm_data, cpu); |
2434 | sd->tss_desc->type = 9; /* available 32/64-bit TSS */ | |
6aa8b732 AK |
2435 | load_TR_desc(); |
2436 | } | |
2437 | ||
e756fc62 | 2438 | static void pre_svm_run(struct vcpu_svm *svm) |
6aa8b732 AK |
2439 | { |
2440 | int cpu = raw_smp_processor_id(); | |
2441 | ||
0fe1e009 | 2442 | struct svm_cpu_data *sd = per_cpu(svm_data, cpu); |
6aa8b732 | 2443 | |
a2fa3e9f | 2444 | svm->vmcb->control.tlb_ctl = TLB_CONTROL_DO_NOTHING; |
4b656b12 | 2445 | /* FIXME: handle wraparound of asid_generation */ |
0fe1e009 TH |
2446 | if (svm->asid_generation != sd->asid_generation) |
2447 | new_asid(svm, sd); | |
6aa8b732 AK |
2448 | } |
2449 | ||
95ba8273 GN |
2450 | static void svm_inject_nmi(struct kvm_vcpu *vcpu) |
2451 | { | |
2452 | struct vcpu_svm *svm = to_svm(vcpu); | |
2453 | ||
2454 | svm->vmcb->control.event_inj = SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_NMI; | |
2455 | vcpu->arch.hflags |= HF_NMI_MASK; | |
2456 | svm->vmcb->control.intercept |= (1UL << INTERCEPT_IRET); | |
2457 | ++vcpu->stat.nmi_injections; | |
2458 | } | |
6aa8b732 | 2459 | |
85f455f7 | 2460 | static inline void svm_inject_irq(struct vcpu_svm *svm, int irq) |
6aa8b732 AK |
2461 | { |
2462 | struct vmcb_control_area *control; | |
2463 | ||
229456fc | 2464 | trace_kvm_inj_virq(irq); |
af9ca2d7 | 2465 | |
fa89a817 | 2466 | ++svm->vcpu.stat.irq_injections; |
e756fc62 | 2467 | control = &svm->vmcb->control; |
85f455f7 | 2468 | control->int_vector = irq; |
6aa8b732 AK |
2469 | control->int_ctl &= ~V_INTR_PRIO_MASK; |
2470 | control->int_ctl |= V_IRQ_MASK | | |
2471 | ((/*control->int_vector >> 4*/ 0xf) << V_INTR_PRIO_SHIFT); | |
2472 | } | |
2473 | ||
66fd3f7f | 2474 | static void svm_set_irq(struct kvm_vcpu *vcpu) |
2a8067f1 ED |
2475 | { |
2476 | struct vcpu_svm *svm = to_svm(vcpu); | |
2477 | ||
2af9194d | 2478 | BUG_ON(!(gif_set(svm))); |
cf74a78b | 2479 | |
219b65dc AG |
2480 | svm->vmcb->control.event_inj = vcpu->arch.interrupt.nr | |
2481 | SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_INTR; | |
2a8067f1 ED |
2482 | } |
2483 | ||
95ba8273 | 2484 | static void update_cr8_intercept(struct kvm_vcpu *vcpu, int tpr, int irr) |
aaacfc9a JR |
2485 | { |
2486 | struct vcpu_svm *svm = to_svm(vcpu); | |
aaacfc9a | 2487 | |
95ba8273 | 2488 | if (irr == -1) |
aaacfc9a JR |
2489 | return; |
2490 | ||
95ba8273 GN |
2491 | if (tpr >= irr) |
2492 | svm->vmcb->control.intercept_cr_write |= INTERCEPT_CR8_MASK; | |
2493 | } | |
aaacfc9a | 2494 | |
95ba8273 GN |
2495 | static int svm_nmi_allowed(struct kvm_vcpu *vcpu) |
2496 | { | |
2497 | struct vcpu_svm *svm = to_svm(vcpu); | |
2498 | struct vmcb *vmcb = svm->vmcb; | |
2499 | return !(vmcb->control.int_state & SVM_INTERRUPT_SHADOW_MASK) && | |
2500 | !(svm->vcpu.arch.hflags & HF_NMI_MASK); | |
aaacfc9a JR |
2501 | } |
2502 | ||
3cfc3092 JK |
2503 | static bool svm_get_nmi_mask(struct kvm_vcpu *vcpu) |
2504 | { | |
2505 | struct vcpu_svm *svm = to_svm(vcpu); | |
2506 | ||
2507 | return !!(svm->vcpu.arch.hflags & HF_NMI_MASK); | |
2508 | } | |
2509 | ||
2510 | static void svm_set_nmi_mask(struct kvm_vcpu *vcpu, bool masked) | |
2511 | { | |
2512 | struct vcpu_svm *svm = to_svm(vcpu); | |
2513 | ||
2514 | if (masked) { | |
2515 | svm->vcpu.arch.hflags |= HF_NMI_MASK; | |
2516 | svm->vmcb->control.intercept |= (1UL << INTERCEPT_IRET); | |
2517 | } else { | |
2518 | svm->vcpu.arch.hflags &= ~HF_NMI_MASK; | |
2519 | svm->vmcb->control.intercept &= ~(1UL << INTERCEPT_IRET); | |
2520 | } | |
2521 | } | |
2522 | ||
78646121 GN |
2523 | static int svm_interrupt_allowed(struct kvm_vcpu *vcpu) |
2524 | { | |
2525 | struct vcpu_svm *svm = to_svm(vcpu); | |
2526 | struct vmcb *vmcb = svm->vmcb; | |
7fcdb510 JR |
2527 | int ret; |
2528 | ||
2529 | if (!gif_set(svm) || | |
2530 | (vmcb->control.int_state & SVM_INTERRUPT_SHADOW_MASK)) | |
2531 | return 0; | |
2532 | ||
2533 | ret = !!(vmcb->save.rflags & X86_EFLAGS_IF); | |
2534 | ||
2535 | if (is_nested(svm)) | |
2536 | return ret && !(svm->vcpu.arch.hflags & HF_VINTR_MASK); | |
2537 | ||
2538 | return ret; | |
78646121 GN |
2539 | } |
2540 | ||
9222be18 | 2541 | static void enable_irq_window(struct kvm_vcpu *vcpu) |
6aa8b732 | 2542 | { |
219b65dc | 2543 | struct vcpu_svm *svm = to_svm(vcpu); |
219b65dc AG |
2544 | |
2545 | nested_svm_intr(svm); | |
2546 | ||
2547 | /* In case GIF=0 we can't rely on the CPU to tell us when | |
2548 | * GIF becomes 1, because that's a separate STGI/VMRUN intercept. | |
2549 | * The next time we get that intercept, this function will be | |
2550 | * called again though and we'll get the vintr intercept. */ | |
2af9194d | 2551 | if (gif_set(svm)) { |
219b65dc AG |
2552 | svm_set_vintr(svm); |
2553 | svm_inject_irq(svm, 0x0); | |
2554 | } | |
85f455f7 ED |
2555 | } |
2556 | ||
95ba8273 | 2557 | static void enable_nmi_window(struct kvm_vcpu *vcpu) |
c1150d8c | 2558 | { |
04d2cc77 | 2559 | struct vcpu_svm *svm = to_svm(vcpu); |
c1150d8c | 2560 | |
44c11430 GN |
2561 | if ((svm->vcpu.arch.hflags & (HF_NMI_MASK | HF_IRET_MASK)) |
2562 | == HF_NMI_MASK) | |
2563 | return; /* IRET will cause a vm exit */ | |
2564 | ||
2565 | /* Something prevents NMI from been injected. Single step over | |
2566 | possible problem (IRET or exception injection or interrupt | |
2567 | shadow) */ | |
6be7d306 | 2568 | svm->nmi_singlestep = true; |
44c11430 GN |
2569 | svm->vmcb->save.rflags |= (X86_EFLAGS_TF | X86_EFLAGS_RF); |
2570 | update_db_intercept(vcpu); | |
c1150d8c DL |
2571 | } |
2572 | ||
cbc94022 IE |
2573 | static int svm_set_tss_addr(struct kvm *kvm, unsigned int addr) |
2574 | { | |
2575 | return 0; | |
2576 | } | |
2577 | ||
d9e368d6 AK |
2578 | static void svm_flush_tlb(struct kvm_vcpu *vcpu) |
2579 | { | |
2580 | force_new_asid(vcpu); | |
2581 | } | |
2582 | ||
04d2cc77 AK |
2583 | static void svm_prepare_guest_switch(struct kvm_vcpu *vcpu) |
2584 | { | |
02daab21 AK |
2585 | if (npt_enabled) |
2586 | vcpu->fpu_active = 1; | |
04d2cc77 AK |
2587 | } |
2588 | ||
d7bf8221 JR |
2589 | static inline void sync_cr8_to_lapic(struct kvm_vcpu *vcpu) |
2590 | { | |
2591 | struct vcpu_svm *svm = to_svm(vcpu); | |
2592 | ||
2593 | if (!(svm->vmcb->control.intercept_cr_write & INTERCEPT_CR8_MASK)) { | |
2594 | int cr8 = svm->vmcb->control.int_ctl & V_TPR_MASK; | |
615d5193 | 2595 | kvm_set_cr8(vcpu, cr8); |
d7bf8221 JR |
2596 | } |
2597 | } | |
2598 | ||
649d6864 JR |
2599 | static inline void sync_lapic_to_cr8(struct kvm_vcpu *vcpu) |
2600 | { | |
2601 | struct vcpu_svm *svm = to_svm(vcpu); | |
2602 | u64 cr8; | |
2603 | ||
649d6864 JR |
2604 | cr8 = kvm_get_cr8(vcpu); |
2605 | svm->vmcb->control.int_ctl &= ~V_TPR_MASK; | |
2606 | svm->vmcb->control.int_ctl |= cr8 & V_TPR_MASK; | |
2607 | } | |
2608 | ||
9222be18 GN |
2609 | static void svm_complete_interrupts(struct vcpu_svm *svm) |
2610 | { | |
2611 | u8 vector; | |
2612 | int type; | |
2613 | u32 exitintinfo = svm->vmcb->control.exit_int_info; | |
2614 | ||
44c11430 GN |
2615 | if (svm->vcpu.arch.hflags & HF_IRET_MASK) |
2616 | svm->vcpu.arch.hflags &= ~(HF_NMI_MASK | HF_IRET_MASK); | |
2617 | ||
9222be18 GN |
2618 | svm->vcpu.arch.nmi_injected = false; |
2619 | kvm_clear_exception_queue(&svm->vcpu); | |
2620 | kvm_clear_interrupt_queue(&svm->vcpu); | |
2621 | ||
2622 | if (!(exitintinfo & SVM_EXITINTINFO_VALID)) | |
2623 | return; | |
2624 | ||
2625 | vector = exitintinfo & SVM_EXITINTINFO_VEC_MASK; | |
2626 | type = exitintinfo & SVM_EXITINTINFO_TYPE_MASK; | |
2627 | ||
2628 | switch (type) { | |
2629 | case SVM_EXITINTINFO_TYPE_NMI: | |
2630 | svm->vcpu.arch.nmi_injected = true; | |
2631 | break; | |
2632 | case SVM_EXITINTINFO_TYPE_EXEPT: | |
2633 | /* In case of software exception do not reinject an exception | |
2634 | vector, but re-execute and instruction instead */ | |
219b65dc AG |
2635 | if (is_nested(svm)) |
2636 | break; | |
66fd3f7f | 2637 | if (kvm_exception_is_soft(vector)) |
9222be18 GN |
2638 | break; |
2639 | if (exitintinfo & SVM_EXITINTINFO_VALID_ERR) { | |
2640 | u32 err = svm->vmcb->control.exit_int_info_err; | |
2641 | kvm_queue_exception_e(&svm->vcpu, vector, err); | |
2642 | ||
2643 | } else | |
2644 | kvm_queue_exception(&svm->vcpu, vector); | |
2645 | break; | |
2646 | case SVM_EXITINTINFO_TYPE_INTR: | |
66fd3f7f | 2647 | kvm_queue_interrupt(&svm->vcpu, vector, false); |
9222be18 GN |
2648 | break; |
2649 | default: | |
2650 | break; | |
2651 | } | |
2652 | } | |
2653 | ||
80e31d4f AK |
2654 | #ifdef CONFIG_X86_64 |
2655 | #define R "r" | |
2656 | #else | |
2657 | #define R "e" | |
2658 | #endif | |
2659 | ||
851ba692 | 2660 | static void svm_vcpu_run(struct kvm_vcpu *vcpu) |
6aa8b732 | 2661 | { |
a2fa3e9f | 2662 | struct vcpu_svm *svm = to_svm(vcpu); |
6aa8b732 AK |
2663 | u16 fs_selector; |
2664 | u16 gs_selector; | |
2665 | u16 ldt_selector; | |
d9e368d6 | 2666 | |
cd3ff653 JR |
2667 | /* |
2668 | * A vmexit emulation is required before the vcpu can be executed | |
2669 | * again. | |
2670 | */ | |
2671 | if (unlikely(svm->nested.exit_required)) | |
2672 | return; | |
2673 | ||
5fdbf976 MT |
2674 | svm->vmcb->save.rax = vcpu->arch.regs[VCPU_REGS_RAX]; |
2675 | svm->vmcb->save.rsp = vcpu->arch.regs[VCPU_REGS_RSP]; | |
2676 | svm->vmcb->save.rip = vcpu->arch.regs[VCPU_REGS_RIP]; | |
2677 | ||
e756fc62 | 2678 | pre_svm_run(svm); |
6aa8b732 | 2679 | |
649d6864 JR |
2680 | sync_lapic_to_cr8(vcpu); |
2681 | ||
6aa8b732 | 2682 | save_host_msrs(vcpu); |
d6e88aec AK |
2683 | fs_selector = kvm_read_fs(); |
2684 | gs_selector = kvm_read_gs(); | |
2685 | ldt_selector = kvm_read_ldt(); | |
cda0ffdd | 2686 | svm->vmcb->save.cr2 = vcpu->arch.cr2; |
709ddebf JR |
2687 | /* required for live migration with NPT */ |
2688 | if (npt_enabled) | |
2689 | svm->vmcb->save.cr3 = vcpu->arch.cr3; | |
6aa8b732 | 2690 | |
04d2cc77 AK |
2691 | clgi(); |
2692 | ||
2693 | local_irq_enable(); | |
36241b8c | 2694 | |
6aa8b732 | 2695 | asm volatile ( |
80e31d4f AK |
2696 | "push %%"R"bp; \n\t" |
2697 | "mov %c[rbx](%[svm]), %%"R"bx \n\t" | |
2698 | "mov %c[rcx](%[svm]), %%"R"cx \n\t" | |
2699 | "mov %c[rdx](%[svm]), %%"R"dx \n\t" | |
2700 | "mov %c[rsi](%[svm]), %%"R"si \n\t" | |
2701 | "mov %c[rdi](%[svm]), %%"R"di \n\t" | |
2702 | "mov %c[rbp](%[svm]), %%"R"bp \n\t" | |
05b3e0c2 | 2703 | #ifdef CONFIG_X86_64 |
fb3f0f51 RR |
2704 | "mov %c[r8](%[svm]), %%r8 \n\t" |
2705 | "mov %c[r9](%[svm]), %%r9 \n\t" | |
2706 | "mov %c[r10](%[svm]), %%r10 \n\t" | |
2707 | "mov %c[r11](%[svm]), %%r11 \n\t" | |
2708 | "mov %c[r12](%[svm]), %%r12 \n\t" | |
2709 | "mov %c[r13](%[svm]), %%r13 \n\t" | |
2710 | "mov %c[r14](%[svm]), %%r14 \n\t" | |
2711 | "mov %c[r15](%[svm]), %%r15 \n\t" | |
6aa8b732 AK |
2712 | #endif |
2713 | ||
6aa8b732 | 2714 | /* Enter guest mode */ |
80e31d4f AK |
2715 | "push %%"R"ax \n\t" |
2716 | "mov %c[vmcb](%[svm]), %%"R"ax \n\t" | |
4ecac3fd AK |
2717 | __ex(SVM_VMLOAD) "\n\t" |
2718 | __ex(SVM_VMRUN) "\n\t" | |
2719 | __ex(SVM_VMSAVE) "\n\t" | |
80e31d4f | 2720 | "pop %%"R"ax \n\t" |
6aa8b732 AK |
2721 | |
2722 | /* Save guest registers, load host registers */ | |
80e31d4f AK |
2723 | "mov %%"R"bx, %c[rbx](%[svm]) \n\t" |
2724 | "mov %%"R"cx, %c[rcx](%[svm]) \n\t" | |
2725 | "mov %%"R"dx, %c[rdx](%[svm]) \n\t" | |
2726 | "mov %%"R"si, %c[rsi](%[svm]) \n\t" | |
2727 | "mov %%"R"di, %c[rdi](%[svm]) \n\t" | |
2728 | "mov %%"R"bp, %c[rbp](%[svm]) \n\t" | |
05b3e0c2 | 2729 | #ifdef CONFIG_X86_64 |
fb3f0f51 RR |
2730 | "mov %%r8, %c[r8](%[svm]) \n\t" |
2731 | "mov %%r9, %c[r9](%[svm]) \n\t" | |
2732 | "mov %%r10, %c[r10](%[svm]) \n\t" | |
2733 | "mov %%r11, %c[r11](%[svm]) \n\t" | |
2734 | "mov %%r12, %c[r12](%[svm]) \n\t" | |
2735 | "mov %%r13, %c[r13](%[svm]) \n\t" | |
2736 | "mov %%r14, %c[r14](%[svm]) \n\t" | |
2737 | "mov %%r15, %c[r15](%[svm]) \n\t" | |
6aa8b732 | 2738 | #endif |
80e31d4f | 2739 | "pop %%"R"bp" |
6aa8b732 | 2740 | : |
fb3f0f51 | 2741 | : [svm]"a"(svm), |
6aa8b732 | 2742 | [vmcb]"i"(offsetof(struct vcpu_svm, vmcb_pa)), |
ad312c7c ZX |
2743 | [rbx]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RBX])), |
2744 | [rcx]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RCX])), | |
2745 | [rdx]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RDX])), | |
2746 | [rsi]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RSI])), | |
2747 | [rdi]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RDI])), | |
2748 | [rbp]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RBP])) | |
05b3e0c2 | 2749 | #ifdef CONFIG_X86_64 |
ad312c7c ZX |
2750 | , [r8]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R8])), |
2751 | [r9]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R9])), | |
2752 | [r10]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R10])), | |
2753 | [r11]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R11])), | |
2754 | [r12]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R12])), | |
2755 | [r13]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R13])), | |
2756 | [r14]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R14])), | |
2757 | [r15]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R15])) | |
6aa8b732 | 2758 | #endif |
54a08c04 | 2759 | : "cc", "memory" |
80e31d4f | 2760 | , R"bx", R"cx", R"dx", R"si", R"di" |
54a08c04 | 2761 | #ifdef CONFIG_X86_64 |
54a08c04 LV |
2762 | , "r8", "r9", "r10", "r11" , "r12", "r13", "r14", "r15" |
2763 | #endif | |
2764 | ); | |
6aa8b732 | 2765 | |
ad312c7c | 2766 | vcpu->arch.cr2 = svm->vmcb->save.cr2; |
5fdbf976 MT |
2767 | vcpu->arch.regs[VCPU_REGS_RAX] = svm->vmcb->save.rax; |
2768 | vcpu->arch.regs[VCPU_REGS_RSP] = svm->vmcb->save.rsp; | |
2769 | vcpu->arch.regs[VCPU_REGS_RIP] = svm->vmcb->save.rip; | |
6aa8b732 | 2770 | |
d6e88aec AK |
2771 | kvm_load_fs(fs_selector); |
2772 | kvm_load_gs(gs_selector); | |
2773 | kvm_load_ldt(ldt_selector); | |
6aa8b732 AK |
2774 | load_host_msrs(vcpu); |
2775 | ||
2776 | reload_tss(vcpu); | |
2777 | ||
56ba47dd AK |
2778 | local_irq_disable(); |
2779 | ||
2780 | stgi(); | |
2781 | ||
d7bf8221 JR |
2782 | sync_cr8_to_lapic(vcpu); |
2783 | ||
a2fa3e9f | 2784 | svm->next_rip = 0; |
9222be18 | 2785 | |
6de4f3ad AK |
2786 | if (npt_enabled) { |
2787 | vcpu->arch.regs_avail &= ~(1 << VCPU_EXREG_PDPTR); | |
2788 | vcpu->arch.regs_dirty &= ~(1 << VCPU_EXREG_PDPTR); | |
2789 | } | |
6aa8b732 AK |
2790 | } |
2791 | ||
80e31d4f AK |
2792 | #undef R |
2793 | ||
6aa8b732 AK |
2794 | static void svm_set_cr3(struct kvm_vcpu *vcpu, unsigned long root) |
2795 | { | |
a2fa3e9f GH |
2796 | struct vcpu_svm *svm = to_svm(vcpu); |
2797 | ||
709ddebf JR |
2798 | if (npt_enabled) { |
2799 | svm->vmcb->control.nested_cr3 = root; | |
2800 | force_new_asid(vcpu); | |
2801 | return; | |
2802 | } | |
2803 | ||
a2fa3e9f | 2804 | svm->vmcb->save.cr3 = root; |
6aa8b732 AK |
2805 | force_new_asid(vcpu); |
2806 | } | |
2807 | ||
6aa8b732 AK |
2808 | static int is_disabled(void) |
2809 | { | |
6031a61c JR |
2810 | u64 vm_cr; |
2811 | ||
2812 | rdmsrl(MSR_VM_CR, vm_cr); | |
2813 | if (vm_cr & (1 << SVM_VM_CR_SVM_DISABLE)) | |
2814 | return 1; | |
2815 | ||
6aa8b732 AK |
2816 | return 0; |
2817 | } | |
2818 | ||
102d8325 IM |
2819 | static void |
2820 | svm_patch_hypercall(struct kvm_vcpu *vcpu, unsigned char *hypercall) | |
2821 | { | |
2822 | /* | |
2823 | * Patch in the VMMCALL instruction: | |
2824 | */ | |
2825 | hypercall[0] = 0x0f; | |
2826 | hypercall[1] = 0x01; | |
2827 | hypercall[2] = 0xd9; | |
102d8325 IM |
2828 | } |
2829 | ||
002c7f7c YS |
2830 | static void svm_check_processor_compat(void *rtn) |
2831 | { | |
2832 | *(int *)rtn = 0; | |
2833 | } | |
2834 | ||
774ead3a AK |
2835 | static bool svm_cpu_has_accelerated_tpr(void) |
2836 | { | |
2837 | return false; | |
2838 | } | |
2839 | ||
67253af5 SY |
2840 | static int get_npt_level(void) |
2841 | { | |
2842 | #ifdef CONFIG_X86_64 | |
2843 | return PT64_ROOT_LEVEL; | |
2844 | #else | |
2845 | return PT32E_ROOT_LEVEL; | |
2846 | #endif | |
2847 | } | |
2848 | ||
4b12f0de | 2849 | static u64 svm_get_mt_mask(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio) |
64d4d521 SY |
2850 | { |
2851 | return 0; | |
2852 | } | |
2853 | ||
0e851880 SY |
2854 | static void svm_cpuid_update(struct kvm_vcpu *vcpu) |
2855 | { | |
2856 | } | |
2857 | ||
229456fc MT |
2858 | static const struct trace_print_flags svm_exit_reasons_str[] = { |
2859 | { SVM_EXIT_READ_CR0, "read_cr0" }, | |
2860 | { SVM_EXIT_READ_CR3, "read_cr3" }, | |
2861 | { SVM_EXIT_READ_CR4, "read_cr4" }, | |
2862 | { SVM_EXIT_READ_CR8, "read_cr8" }, | |
2863 | { SVM_EXIT_WRITE_CR0, "write_cr0" }, | |
2864 | { SVM_EXIT_WRITE_CR3, "write_cr3" }, | |
2865 | { SVM_EXIT_WRITE_CR4, "write_cr4" }, | |
2866 | { SVM_EXIT_WRITE_CR8, "write_cr8" }, | |
2867 | { SVM_EXIT_READ_DR0, "read_dr0" }, | |
2868 | { SVM_EXIT_READ_DR1, "read_dr1" }, | |
2869 | { SVM_EXIT_READ_DR2, "read_dr2" }, | |
2870 | { SVM_EXIT_READ_DR3, "read_dr3" }, | |
2871 | { SVM_EXIT_WRITE_DR0, "write_dr0" }, | |
2872 | { SVM_EXIT_WRITE_DR1, "write_dr1" }, | |
2873 | { SVM_EXIT_WRITE_DR2, "write_dr2" }, | |
2874 | { SVM_EXIT_WRITE_DR3, "write_dr3" }, | |
2875 | { SVM_EXIT_WRITE_DR5, "write_dr5" }, | |
2876 | { SVM_EXIT_WRITE_DR7, "write_dr7" }, | |
2877 | { SVM_EXIT_EXCP_BASE + DB_VECTOR, "DB excp" }, | |
2878 | { SVM_EXIT_EXCP_BASE + BP_VECTOR, "BP excp" }, | |
2879 | { SVM_EXIT_EXCP_BASE + UD_VECTOR, "UD excp" }, | |
2880 | { SVM_EXIT_EXCP_BASE + PF_VECTOR, "PF excp" }, | |
2881 | { SVM_EXIT_EXCP_BASE + NM_VECTOR, "NM excp" }, | |
2882 | { SVM_EXIT_EXCP_BASE + MC_VECTOR, "MC excp" }, | |
2883 | { SVM_EXIT_INTR, "interrupt" }, | |
2884 | { SVM_EXIT_NMI, "nmi" }, | |
2885 | { SVM_EXIT_SMI, "smi" }, | |
2886 | { SVM_EXIT_INIT, "init" }, | |
2887 | { SVM_EXIT_VINTR, "vintr" }, | |
2888 | { SVM_EXIT_CPUID, "cpuid" }, | |
2889 | { SVM_EXIT_INVD, "invd" }, | |
2890 | { SVM_EXIT_HLT, "hlt" }, | |
2891 | { SVM_EXIT_INVLPG, "invlpg" }, | |
2892 | { SVM_EXIT_INVLPGA, "invlpga" }, | |
2893 | { SVM_EXIT_IOIO, "io" }, | |
2894 | { SVM_EXIT_MSR, "msr" }, | |
2895 | { SVM_EXIT_TASK_SWITCH, "task_switch" }, | |
2896 | { SVM_EXIT_SHUTDOWN, "shutdown" }, | |
2897 | { SVM_EXIT_VMRUN, "vmrun" }, | |
2898 | { SVM_EXIT_VMMCALL, "hypercall" }, | |
2899 | { SVM_EXIT_VMLOAD, "vmload" }, | |
2900 | { SVM_EXIT_VMSAVE, "vmsave" }, | |
2901 | { SVM_EXIT_STGI, "stgi" }, | |
2902 | { SVM_EXIT_CLGI, "clgi" }, | |
2903 | { SVM_EXIT_SKINIT, "skinit" }, | |
2904 | { SVM_EXIT_WBINVD, "wbinvd" }, | |
2905 | { SVM_EXIT_MONITOR, "monitor" }, | |
2906 | { SVM_EXIT_MWAIT, "mwait" }, | |
2907 | { SVM_EXIT_NPF, "npf" }, | |
2908 | { -1, NULL } | |
2909 | }; | |
2910 | ||
17cc3935 | 2911 | static int svm_get_lpage_level(void) |
344f414f | 2912 | { |
17cc3935 | 2913 | return PT_PDPE_LEVEL; |
344f414f JR |
2914 | } |
2915 | ||
4e47c7a6 SY |
2916 | static bool svm_rdtscp_supported(void) |
2917 | { | |
2918 | return false; | |
2919 | } | |
2920 | ||
02daab21 AK |
2921 | static void svm_fpu_deactivate(struct kvm_vcpu *vcpu) |
2922 | { | |
2923 | struct vcpu_svm *svm = to_svm(vcpu); | |
2924 | ||
2925 | if (npt_enabled) { | |
2926 | /* hack: npt requires active fpu at this time */ | |
2927 | vcpu->fpu_active = 1; | |
2928 | return; | |
2929 | } | |
2930 | ||
2931 | svm->vmcb->control.intercept_exceptions |= 1 << NM_VECTOR; | |
2932 | svm->vmcb->save.cr0 |= X86_CR0_TS; | |
2933 | } | |
2934 | ||
cbdd1bea | 2935 | static struct kvm_x86_ops svm_x86_ops = { |
6aa8b732 AK |
2936 | .cpu_has_kvm_support = has_svm, |
2937 | .disabled_by_bios = is_disabled, | |
2938 | .hardware_setup = svm_hardware_setup, | |
2939 | .hardware_unsetup = svm_hardware_unsetup, | |
002c7f7c | 2940 | .check_processor_compatibility = svm_check_processor_compat, |
6aa8b732 AK |
2941 | .hardware_enable = svm_hardware_enable, |
2942 | .hardware_disable = svm_hardware_disable, | |
774ead3a | 2943 | .cpu_has_accelerated_tpr = svm_cpu_has_accelerated_tpr, |
6aa8b732 AK |
2944 | |
2945 | .vcpu_create = svm_create_vcpu, | |
2946 | .vcpu_free = svm_free_vcpu, | |
04d2cc77 | 2947 | .vcpu_reset = svm_vcpu_reset, |
6aa8b732 | 2948 | |
04d2cc77 | 2949 | .prepare_guest_switch = svm_prepare_guest_switch, |
6aa8b732 AK |
2950 | .vcpu_load = svm_vcpu_load, |
2951 | .vcpu_put = svm_vcpu_put, | |
2952 | ||
2953 | .set_guest_debug = svm_guest_debug, | |
2954 | .get_msr = svm_get_msr, | |
2955 | .set_msr = svm_set_msr, | |
2956 | .get_segment_base = svm_get_segment_base, | |
2957 | .get_segment = svm_get_segment, | |
2958 | .set_segment = svm_set_segment, | |
2e4d2653 | 2959 | .get_cpl = svm_get_cpl, |
1747fb71 | 2960 | .get_cs_db_l_bits = kvm_get_cs_db_l_bits, |
e8467fda | 2961 | .decache_cr0_guest_bits = svm_decache_cr0_guest_bits, |
25c4c276 | 2962 | .decache_cr4_guest_bits = svm_decache_cr4_guest_bits, |
6aa8b732 | 2963 | .set_cr0 = svm_set_cr0, |
6aa8b732 AK |
2964 | .set_cr3 = svm_set_cr3, |
2965 | .set_cr4 = svm_set_cr4, | |
2966 | .set_efer = svm_set_efer, | |
2967 | .get_idt = svm_get_idt, | |
2968 | .set_idt = svm_set_idt, | |
2969 | .get_gdt = svm_get_gdt, | |
2970 | .set_gdt = svm_set_gdt, | |
2971 | .get_dr = svm_get_dr, | |
2972 | .set_dr = svm_set_dr, | |
6de4f3ad | 2973 | .cache_reg = svm_cache_reg, |
6aa8b732 AK |
2974 | .get_rflags = svm_get_rflags, |
2975 | .set_rflags = svm_set_rflags, | |
02daab21 | 2976 | .fpu_deactivate = svm_fpu_deactivate, |
6aa8b732 | 2977 | |
6aa8b732 | 2978 | .tlb_flush = svm_flush_tlb, |
6aa8b732 | 2979 | |
6aa8b732 | 2980 | .run = svm_vcpu_run, |
04d2cc77 | 2981 | .handle_exit = handle_exit, |
6aa8b732 | 2982 | .skip_emulated_instruction = skip_emulated_instruction, |
2809f5d2 GC |
2983 | .set_interrupt_shadow = svm_set_interrupt_shadow, |
2984 | .get_interrupt_shadow = svm_get_interrupt_shadow, | |
102d8325 | 2985 | .patch_hypercall = svm_patch_hypercall, |
2a8067f1 | 2986 | .set_irq = svm_set_irq, |
95ba8273 | 2987 | .set_nmi = svm_inject_nmi, |
298101da | 2988 | .queue_exception = svm_queue_exception, |
78646121 | 2989 | .interrupt_allowed = svm_interrupt_allowed, |
95ba8273 | 2990 | .nmi_allowed = svm_nmi_allowed, |
3cfc3092 JK |
2991 | .get_nmi_mask = svm_get_nmi_mask, |
2992 | .set_nmi_mask = svm_set_nmi_mask, | |
95ba8273 GN |
2993 | .enable_nmi_window = enable_nmi_window, |
2994 | .enable_irq_window = enable_irq_window, | |
2995 | .update_cr8_intercept = update_cr8_intercept, | |
cbc94022 IE |
2996 | |
2997 | .set_tss_addr = svm_set_tss_addr, | |
67253af5 | 2998 | .get_tdp_level = get_npt_level, |
4b12f0de | 2999 | .get_mt_mask = svm_get_mt_mask, |
229456fc MT |
3000 | |
3001 | .exit_reasons_str = svm_exit_reasons_str, | |
17cc3935 | 3002 | .get_lpage_level = svm_get_lpage_level, |
0e851880 SY |
3003 | |
3004 | .cpuid_update = svm_cpuid_update, | |
4e47c7a6 SY |
3005 | |
3006 | .rdtscp_supported = svm_rdtscp_supported, | |
6aa8b732 AK |
3007 | }; |
3008 | ||
3009 | static int __init svm_init(void) | |
3010 | { | |
cb498ea2 | 3011 | return kvm_init(&svm_x86_ops, sizeof(struct vcpu_svm), |
c16f862d | 3012 | THIS_MODULE); |
6aa8b732 AK |
3013 | } |
3014 | ||
3015 | static void __exit svm_exit(void) | |
3016 | { | |
cb498ea2 | 3017 | kvm_exit(); |
6aa8b732 AK |
3018 | } |
3019 | ||
3020 | module_init(svm_init) | |
3021 | module_exit(svm_exit) |