Commit | Line | Data |
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043405e1 CO |
1 | /* |
2 | * Kernel-based Virtual Machine driver for Linux | |
3 | * | |
4 | * derived from drivers/kvm/kvm_main.c | |
5 | * | |
6 | * Copyright (C) 2006 Qumranet, Inc. | |
4d5c5d0f BAY |
7 | * Copyright (C) 2008 Qumranet, Inc. |
8 | * Copyright IBM Corporation, 2008 | |
9611c187 | 9 | * Copyright 2010 Red Hat, Inc. and/or its affiliates. |
043405e1 CO |
10 | * |
11 | * Authors: | |
12 | * Avi Kivity <avi@qumranet.com> | |
13 | * Yaniv Kamay <yaniv@qumranet.com> | |
4d5c5d0f BAY |
14 | * Amit Shah <amit.shah@qumranet.com> |
15 | * Ben-Ami Yassour <benami@il.ibm.com> | |
043405e1 CO |
16 | * |
17 | * This work is licensed under the terms of the GNU GPL, version 2. See | |
18 | * the COPYING file in the top-level directory. | |
19 | * | |
20 | */ | |
21 | ||
edf88417 | 22 | #include <linux/kvm_host.h> |
313a3dc7 | 23 | #include "irq.h" |
1d737c8a | 24 | #include "mmu.h" |
7837699f | 25 | #include "i8254.h" |
37817f29 | 26 | #include "tss.h" |
5fdbf976 | 27 | #include "kvm_cache_regs.h" |
26eef70c | 28 | #include "x86.h" |
313a3dc7 | 29 | |
18068523 | 30 | #include <linux/clocksource.h> |
4d5c5d0f | 31 | #include <linux/interrupt.h> |
313a3dc7 CO |
32 | #include <linux/kvm.h> |
33 | #include <linux/fs.h> | |
34 | #include <linux/vmalloc.h> | |
5fb76f9b | 35 | #include <linux/module.h> |
0de10343 | 36 | #include <linux/mman.h> |
2bacc55c | 37 | #include <linux/highmem.h> |
19de40a8 | 38 | #include <linux/iommu.h> |
62c476c7 | 39 | #include <linux/intel-iommu.h> |
c8076604 | 40 | #include <linux/cpufreq.h> |
18863bdd | 41 | #include <linux/user-return-notifier.h> |
a983fb23 | 42 | #include <linux/srcu.h> |
5a0e3ad6 | 43 | #include <linux/slab.h> |
ff9d07a0 | 44 | #include <linux/perf_event.h> |
7bee342a | 45 | #include <linux/uaccess.h> |
af585b92 | 46 | #include <linux/hash.h> |
a1b60c1c | 47 | #include <linux/pci.h> |
aec51dc4 | 48 | #include <trace/events/kvm.h> |
2ed152af | 49 | |
229456fc MT |
50 | #define CREATE_TRACE_POINTS |
51 | #include "trace.h" | |
043405e1 | 52 | |
24f1e32c | 53 | #include <asm/debugreg.h> |
d825ed0a | 54 | #include <asm/msr.h> |
a5f61300 | 55 | #include <asm/desc.h> |
0bed3b56 | 56 | #include <asm/mtrr.h> |
890ca9ae | 57 | #include <asm/mce.h> |
7cf30855 | 58 | #include <asm/i387.h> |
98918833 | 59 | #include <asm/xcr.h> |
1d5f066e | 60 | #include <asm/pvclock.h> |
217fc9cf | 61 | #include <asm/div64.h> |
043405e1 | 62 | |
313a3dc7 | 63 | #define MAX_IO_MSRS 256 |
890ca9ae | 64 | #define KVM_MAX_MCE_BANKS 32 |
5854dbca | 65 | #define KVM_MCE_CAP_SUPPORTED (MCG_CTL_P | MCG_SER_P) |
890ca9ae | 66 | |
0f65dd70 AK |
67 | #define emul_to_vcpu(ctxt) \ |
68 | container_of(ctxt, struct kvm_vcpu, arch.emulate_ctxt) | |
69 | ||
50a37eb4 JR |
70 | /* EFER defaults: |
71 | * - enable syscall per default because its emulated by KVM | |
72 | * - enable LME and LMA per default on 64 bit KVM | |
73 | */ | |
74 | #ifdef CONFIG_X86_64 | |
1260edbe LJ |
75 | static |
76 | u64 __read_mostly efer_reserved_bits = ~((u64)(EFER_SCE | EFER_LME | EFER_LMA)); | |
50a37eb4 | 77 | #else |
1260edbe | 78 | static u64 __read_mostly efer_reserved_bits = ~((u64)EFER_SCE); |
50a37eb4 | 79 | #endif |
313a3dc7 | 80 | |
ba1389b7 AK |
81 | #define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM |
82 | #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU | |
417bc304 | 83 | |
cb142eb7 | 84 | static void update_cr8_intercept(struct kvm_vcpu *vcpu); |
674eea0f AK |
85 | static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2 *cpuid, |
86 | struct kvm_cpuid_entry2 __user *entries); | |
7460fb4a | 87 | static void process_nmi(struct kvm_vcpu *vcpu); |
674eea0f | 88 | |
97896d04 | 89 | struct kvm_x86_ops *kvm_x86_ops; |
5fdbf976 | 90 | EXPORT_SYMBOL_GPL(kvm_x86_ops); |
97896d04 | 91 | |
ed85c068 AP |
92 | int ignore_msrs = 0; |
93 | module_param_named(ignore_msrs, ignore_msrs, bool, S_IRUGO | S_IWUSR); | |
94 | ||
92a1f12d JR |
95 | bool kvm_has_tsc_control; |
96 | EXPORT_SYMBOL_GPL(kvm_has_tsc_control); | |
97 | u32 kvm_max_guest_tsc_khz; | |
98 | EXPORT_SYMBOL_GPL(kvm_max_guest_tsc_khz); | |
99 | ||
18863bdd AK |
100 | #define KVM_NR_SHARED_MSRS 16 |
101 | ||
102 | struct kvm_shared_msrs_global { | |
103 | int nr; | |
2bf78fa7 | 104 | u32 msrs[KVM_NR_SHARED_MSRS]; |
18863bdd AK |
105 | }; |
106 | ||
107 | struct kvm_shared_msrs { | |
108 | struct user_return_notifier urn; | |
109 | bool registered; | |
2bf78fa7 SY |
110 | struct kvm_shared_msr_values { |
111 | u64 host; | |
112 | u64 curr; | |
113 | } values[KVM_NR_SHARED_MSRS]; | |
18863bdd AK |
114 | }; |
115 | ||
116 | static struct kvm_shared_msrs_global __read_mostly shared_msrs_global; | |
117 | static DEFINE_PER_CPU(struct kvm_shared_msrs, shared_msrs); | |
118 | ||
417bc304 | 119 | struct kvm_stats_debugfs_item debugfs_entries[] = { |
ba1389b7 AK |
120 | { "pf_fixed", VCPU_STAT(pf_fixed) }, |
121 | { "pf_guest", VCPU_STAT(pf_guest) }, | |
122 | { "tlb_flush", VCPU_STAT(tlb_flush) }, | |
123 | { "invlpg", VCPU_STAT(invlpg) }, | |
124 | { "exits", VCPU_STAT(exits) }, | |
125 | { "io_exits", VCPU_STAT(io_exits) }, | |
126 | { "mmio_exits", VCPU_STAT(mmio_exits) }, | |
127 | { "signal_exits", VCPU_STAT(signal_exits) }, | |
128 | { "irq_window", VCPU_STAT(irq_window_exits) }, | |
f08864b4 | 129 | { "nmi_window", VCPU_STAT(nmi_window_exits) }, |
ba1389b7 AK |
130 | { "halt_exits", VCPU_STAT(halt_exits) }, |
131 | { "halt_wakeup", VCPU_STAT(halt_wakeup) }, | |
f11c3a8d | 132 | { "hypercalls", VCPU_STAT(hypercalls) }, |
ba1389b7 AK |
133 | { "request_irq", VCPU_STAT(request_irq_exits) }, |
134 | { "irq_exits", VCPU_STAT(irq_exits) }, | |
135 | { "host_state_reload", VCPU_STAT(host_state_reload) }, | |
136 | { "efer_reload", VCPU_STAT(efer_reload) }, | |
137 | { "fpu_reload", VCPU_STAT(fpu_reload) }, | |
138 | { "insn_emulation", VCPU_STAT(insn_emulation) }, | |
139 | { "insn_emulation_fail", VCPU_STAT(insn_emulation_fail) }, | |
fa89a817 | 140 | { "irq_injections", VCPU_STAT(irq_injections) }, |
c4abb7c9 | 141 | { "nmi_injections", VCPU_STAT(nmi_injections) }, |
4cee5764 AK |
142 | { "mmu_shadow_zapped", VM_STAT(mmu_shadow_zapped) }, |
143 | { "mmu_pte_write", VM_STAT(mmu_pte_write) }, | |
144 | { "mmu_pte_updated", VM_STAT(mmu_pte_updated) }, | |
145 | { "mmu_pde_zapped", VM_STAT(mmu_pde_zapped) }, | |
146 | { "mmu_flooded", VM_STAT(mmu_flooded) }, | |
147 | { "mmu_recycled", VM_STAT(mmu_recycled) }, | |
dfc5aa00 | 148 | { "mmu_cache_miss", VM_STAT(mmu_cache_miss) }, |
4731d4c7 | 149 | { "mmu_unsync", VM_STAT(mmu_unsync) }, |
0f74a24c | 150 | { "remote_tlb_flush", VM_STAT(remote_tlb_flush) }, |
05da4558 | 151 | { "largepages", VM_STAT(lpages) }, |
417bc304 HB |
152 | { NULL } |
153 | }; | |
154 | ||
2acf923e DC |
155 | u64 __read_mostly host_xcr0; |
156 | ||
d6aa1000 AK |
157 | int emulator_fix_hypercall(struct x86_emulate_ctxt *ctxt); |
158 | ||
af585b92 GN |
159 | static inline void kvm_async_pf_hash_reset(struct kvm_vcpu *vcpu) |
160 | { | |
161 | int i; | |
162 | for (i = 0; i < roundup_pow_of_two(ASYNC_PF_PER_VCPU); i++) | |
163 | vcpu->arch.apf.gfns[i] = ~0; | |
164 | } | |
165 | ||
18863bdd AK |
166 | static void kvm_on_user_return(struct user_return_notifier *urn) |
167 | { | |
168 | unsigned slot; | |
18863bdd AK |
169 | struct kvm_shared_msrs *locals |
170 | = container_of(urn, struct kvm_shared_msrs, urn); | |
2bf78fa7 | 171 | struct kvm_shared_msr_values *values; |
18863bdd AK |
172 | |
173 | for (slot = 0; slot < shared_msrs_global.nr; ++slot) { | |
2bf78fa7 SY |
174 | values = &locals->values[slot]; |
175 | if (values->host != values->curr) { | |
176 | wrmsrl(shared_msrs_global.msrs[slot], values->host); | |
177 | values->curr = values->host; | |
18863bdd AK |
178 | } |
179 | } | |
180 | locals->registered = false; | |
181 | user_return_notifier_unregister(urn); | |
182 | } | |
183 | ||
2bf78fa7 | 184 | static void shared_msr_update(unsigned slot, u32 msr) |
18863bdd | 185 | { |
2bf78fa7 | 186 | struct kvm_shared_msrs *smsr; |
18863bdd AK |
187 | u64 value; |
188 | ||
2bf78fa7 SY |
189 | smsr = &__get_cpu_var(shared_msrs); |
190 | /* only read, and nobody should modify it at this time, | |
191 | * so don't need lock */ | |
192 | if (slot >= shared_msrs_global.nr) { | |
193 | printk(KERN_ERR "kvm: invalid MSR slot!"); | |
194 | return; | |
195 | } | |
196 | rdmsrl_safe(msr, &value); | |
197 | smsr->values[slot].host = value; | |
198 | smsr->values[slot].curr = value; | |
199 | } | |
200 | ||
201 | void kvm_define_shared_msr(unsigned slot, u32 msr) | |
202 | { | |
18863bdd AK |
203 | if (slot >= shared_msrs_global.nr) |
204 | shared_msrs_global.nr = slot + 1; | |
2bf78fa7 SY |
205 | shared_msrs_global.msrs[slot] = msr; |
206 | /* we need ensured the shared_msr_global have been updated */ | |
207 | smp_wmb(); | |
18863bdd AK |
208 | } |
209 | EXPORT_SYMBOL_GPL(kvm_define_shared_msr); | |
210 | ||
211 | static void kvm_shared_msr_cpu_online(void) | |
212 | { | |
213 | unsigned i; | |
18863bdd AK |
214 | |
215 | for (i = 0; i < shared_msrs_global.nr; ++i) | |
2bf78fa7 | 216 | shared_msr_update(i, shared_msrs_global.msrs[i]); |
18863bdd AK |
217 | } |
218 | ||
d5696725 | 219 | void kvm_set_shared_msr(unsigned slot, u64 value, u64 mask) |
18863bdd AK |
220 | { |
221 | struct kvm_shared_msrs *smsr = &__get_cpu_var(shared_msrs); | |
222 | ||
2bf78fa7 | 223 | if (((value ^ smsr->values[slot].curr) & mask) == 0) |
18863bdd | 224 | return; |
2bf78fa7 SY |
225 | smsr->values[slot].curr = value; |
226 | wrmsrl(shared_msrs_global.msrs[slot], value); | |
18863bdd AK |
227 | if (!smsr->registered) { |
228 | smsr->urn.on_user_return = kvm_on_user_return; | |
229 | user_return_notifier_register(&smsr->urn); | |
230 | smsr->registered = true; | |
231 | } | |
232 | } | |
233 | EXPORT_SYMBOL_GPL(kvm_set_shared_msr); | |
234 | ||
3548bab5 AK |
235 | static void drop_user_return_notifiers(void *ignore) |
236 | { | |
237 | struct kvm_shared_msrs *smsr = &__get_cpu_var(shared_msrs); | |
238 | ||
239 | if (smsr->registered) | |
240 | kvm_on_user_return(&smsr->urn); | |
241 | } | |
242 | ||
6866b83e CO |
243 | u64 kvm_get_apic_base(struct kvm_vcpu *vcpu) |
244 | { | |
245 | if (irqchip_in_kernel(vcpu->kvm)) | |
ad312c7c | 246 | return vcpu->arch.apic_base; |
6866b83e | 247 | else |
ad312c7c | 248 | return vcpu->arch.apic_base; |
6866b83e CO |
249 | } |
250 | EXPORT_SYMBOL_GPL(kvm_get_apic_base); | |
251 | ||
252 | void kvm_set_apic_base(struct kvm_vcpu *vcpu, u64 data) | |
253 | { | |
254 | /* TODO: reserve bits check */ | |
255 | if (irqchip_in_kernel(vcpu->kvm)) | |
256 | kvm_lapic_set_base(vcpu, data); | |
257 | else | |
ad312c7c | 258 | vcpu->arch.apic_base = data; |
6866b83e CO |
259 | } |
260 | EXPORT_SYMBOL_GPL(kvm_set_apic_base); | |
261 | ||
3fd28fce ED |
262 | #define EXCPT_BENIGN 0 |
263 | #define EXCPT_CONTRIBUTORY 1 | |
264 | #define EXCPT_PF 2 | |
265 | ||
266 | static int exception_class(int vector) | |
267 | { | |
268 | switch (vector) { | |
269 | case PF_VECTOR: | |
270 | return EXCPT_PF; | |
271 | case DE_VECTOR: | |
272 | case TS_VECTOR: | |
273 | case NP_VECTOR: | |
274 | case SS_VECTOR: | |
275 | case GP_VECTOR: | |
276 | return EXCPT_CONTRIBUTORY; | |
277 | default: | |
278 | break; | |
279 | } | |
280 | return EXCPT_BENIGN; | |
281 | } | |
282 | ||
283 | static void kvm_multiple_exception(struct kvm_vcpu *vcpu, | |
ce7ddec4 JR |
284 | unsigned nr, bool has_error, u32 error_code, |
285 | bool reinject) | |
3fd28fce ED |
286 | { |
287 | u32 prev_nr; | |
288 | int class1, class2; | |
289 | ||
3842d135 AK |
290 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
291 | ||
3fd28fce ED |
292 | if (!vcpu->arch.exception.pending) { |
293 | queue: | |
294 | vcpu->arch.exception.pending = true; | |
295 | vcpu->arch.exception.has_error_code = has_error; | |
296 | vcpu->arch.exception.nr = nr; | |
297 | vcpu->arch.exception.error_code = error_code; | |
3f0fd292 | 298 | vcpu->arch.exception.reinject = reinject; |
3fd28fce ED |
299 | return; |
300 | } | |
301 | ||
302 | /* to check exception */ | |
303 | prev_nr = vcpu->arch.exception.nr; | |
304 | if (prev_nr == DF_VECTOR) { | |
305 | /* triple fault -> shutdown */ | |
a8eeb04a | 306 | kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu); |
3fd28fce ED |
307 | return; |
308 | } | |
309 | class1 = exception_class(prev_nr); | |
310 | class2 = exception_class(nr); | |
311 | if ((class1 == EXCPT_CONTRIBUTORY && class2 == EXCPT_CONTRIBUTORY) | |
312 | || (class1 == EXCPT_PF && class2 != EXCPT_BENIGN)) { | |
313 | /* generate double fault per SDM Table 5-5 */ | |
314 | vcpu->arch.exception.pending = true; | |
315 | vcpu->arch.exception.has_error_code = true; | |
316 | vcpu->arch.exception.nr = DF_VECTOR; | |
317 | vcpu->arch.exception.error_code = 0; | |
318 | } else | |
319 | /* replace previous exception with a new one in a hope | |
320 | that instruction re-execution will regenerate lost | |
321 | exception */ | |
322 | goto queue; | |
323 | } | |
324 | ||
298101da AK |
325 | void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr) |
326 | { | |
ce7ddec4 | 327 | kvm_multiple_exception(vcpu, nr, false, 0, false); |
298101da AK |
328 | } |
329 | EXPORT_SYMBOL_GPL(kvm_queue_exception); | |
330 | ||
ce7ddec4 JR |
331 | void kvm_requeue_exception(struct kvm_vcpu *vcpu, unsigned nr) |
332 | { | |
333 | kvm_multiple_exception(vcpu, nr, false, 0, true); | |
334 | } | |
335 | EXPORT_SYMBOL_GPL(kvm_requeue_exception); | |
336 | ||
db8fcefa | 337 | void kvm_complete_insn_gp(struct kvm_vcpu *vcpu, int err) |
c3c91fee | 338 | { |
db8fcefa AP |
339 | if (err) |
340 | kvm_inject_gp(vcpu, 0); | |
341 | else | |
342 | kvm_x86_ops->skip_emulated_instruction(vcpu); | |
343 | } | |
344 | EXPORT_SYMBOL_GPL(kvm_complete_insn_gp); | |
8df25a32 | 345 | |
6389ee94 | 346 | void kvm_inject_page_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault) |
c3c91fee AK |
347 | { |
348 | ++vcpu->stat.pf_guest; | |
6389ee94 AK |
349 | vcpu->arch.cr2 = fault->address; |
350 | kvm_queue_exception_e(vcpu, PF_VECTOR, fault->error_code); | |
c3c91fee | 351 | } |
27d6c865 | 352 | EXPORT_SYMBOL_GPL(kvm_inject_page_fault); |
c3c91fee | 353 | |
6389ee94 | 354 | void kvm_propagate_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault) |
d4f8cf66 | 355 | { |
6389ee94 AK |
356 | if (mmu_is_nested(vcpu) && !fault->nested_page_fault) |
357 | vcpu->arch.nested_mmu.inject_page_fault(vcpu, fault); | |
d4f8cf66 | 358 | else |
6389ee94 | 359 | vcpu->arch.mmu.inject_page_fault(vcpu, fault); |
d4f8cf66 JR |
360 | } |
361 | ||
3419ffc8 SY |
362 | void kvm_inject_nmi(struct kvm_vcpu *vcpu) |
363 | { | |
7460fb4a AK |
364 | atomic_inc(&vcpu->arch.nmi_queued); |
365 | kvm_make_request(KVM_REQ_NMI, vcpu); | |
3419ffc8 SY |
366 | } |
367 | EXPORT_SYMBOL_GPL(kvm_inject_nmi); | |
368 | ||
298101da AK |
369 | void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code) |
370 | { | |
ce7ddec4 | 371 | kvm_multiple_exception(vcpu, nr, true, error_code, false); |
298101da AK |
372 | } |
373 | EXPORT_SYMBOL_GPL(kvm_queue_exception_e); | |
374 | ||
ce7ddec4 JR |
375 | void kvm_requeue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code) |
376 | { | |
377 | kvm_multiple_exception(vcpu, nr, true, error_code, true); | |
378 | } | |
379 | EXPORT_SYMBOL_GPL(kvm_requeue_exception_e); | |
380 | ||
0a79b009 AK |
381 | /* |
382 | * Checks if cpl <= required_cpl; if true, return true. Otherwise queue | |
383 | * a #GP and return false. | |
384 | */ | |
385 | bool kvm_require_cpl(struct kvm_vcpu *vcpu, int required_cpl) | |
298101da | 386 | { |
0a79b009 AK |
387 | if (kvm_x86_ops->get_cpl(vcpu) <= required_cpl) |
388 | return true; | |
389 | kvm_queue_exception_e(vcpu, GP_VECTOR, 0); | |
390 | return false; | |
298101da | 391 | } |
0a79b009 | 392 | EXPORT_SYMBOL_GPL(kvm_require_cpl); |
298101da | 393 | |
ec92fe44 JR |
394 | /* |
395 | * This function will be used to read from the physical memory of the currently | |
396 | * running guest. The difference to kvm_read_guest_page is that this function | |
397 | * can read from guest physical or from the guest's guest physical memory. | |
398 | */ | |
399 | int kvm_read_guest_page_mmu(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, | |
400 | gfn_t ngfn, void *data, int offset, int len, | |
401 | u32 access) | |
402 | { | |
403 | gfn_t real_gfn; | |
404 | gpa_t ngpa; | |
405 | ||
406 | ngpa = gfn_to_gpa(ngfn); | |
407 | real_gfn = mmu->translate_gpa(vcpu, ngpa, access); | |
408 | if (real_gfn == UNMAPPED_GVA) | |
409 | return -EFAULT; | |
410 | ||
411 | real_gfn = gpa_to_gfn(real_gfn); | |
412 | ||
413 | return kvm_read_guest_page(vcpu->kvm, real_gfn, data, offset, len); | |
414 | } | |
415 | EXPORT_SYMBOL_GPL(kvm_read_guest_page_mmu); | |
416 | ||
3d06b8bf JR |
417 | int kvm_read_nested_guest_page(struct kvm_vcpu *vcpu, gfn_t gfn, |
418 | void *data, int offset, int len, u32 access) | |
419 | { | |
420 | return kvm_read_guest_page_mmu(vcpu, vcpu->arch.walk_mmu, gfn, | |
421 | data, offset, len, access); | |
422 | } | |
423 | ||
a03490ed CO |
424 | /* |
425 | * Load the pae pdptrs. Return true is they are all valid. | |
426 | */ | |
ff03a073 | 427 | int load_pdptrs(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, unsigned long cr3) |
a03490ed CO |
428 | { |
429 | gfn_t pdpt_gfn = cr3 >> PAGE_SHIFT; | |
430 | unsigned offset = ((cr3 & (PAGE_SIZE-1)) >> 5) << 2; | |
431 | int i; | |
432 | int ret; | |
ff03a073 | 433 | u64 pdpte[ARRAY_SIZE(mmu->pdptrs)]; |
a03490ed | 434 | |
ff03a073 JR |
435 | ret = kvm_read_guest_page_mmu(vcpu, mmu, pdpt_gfn, pdpte, |
436 | offset * sizeof(u64), sizeof(pdpte), | |
437 | PFERR_USER_MASK|PFERR_WRITE_MASK); | |
a03490ed CO |
438 | if (ret < 0) { |
439 | ret = 0; | |
440 | goto out; | |
441 | } | |
442 | for (i = 0; i < ARRAY_SIZE(pdpte); ++i) { | |
43a3795a | 443 | if (is_present_gpte(pdpte[i]) && |
20c466b5 | 444 | (pdpte[i] & vcpu->arch.mmu.rsvd_bits_mask[0][2])) { |
a03490ed CO |
445 | ret = 0; |
446 | goto out; | |
447 | } | |
448 | } | |
449 | ret = 1; | |
450 | ||
ff03a073 | 451 | memcpy(mmu->pdptrs, pdpte, sizeof(mmu->pdptrs)); |
6de4f3ad AK |
452 | __set_bit(VCPU_EXREG_PDPTR, |
453 | (unsigned long *)&vcpu->arch.regs_avail); | |
454 | __set_bit(VCPU_EXREG_PDPTR, | |
455 | (unsigned long *)&vcpu->arch.regs_dirty); | |
a03490ed | 456 | out: |
a03490ed CO |
457 | |
458 | return ret; | |
459 | } | |
cc4b6871 | 460 | EXPORT_SYMBOL_GPL(load_pdptrs); |
a03490ed | 461 | |
d835dfec AK |
462 | static bool pdptrs_changed(struct kvm_vcpu *vcpu) |
463 | { | |
ff03a073 | 464 | u64 pdpte[ARRAY_SIZE(vcpu->arch.walk_mmu->pdptrs)]; |
d835dfec | 465 | bool changed = true; |
3d06b8bf JR |
466 | int offset; |
467 | gfn_t gfn; | |
d835dfec AK |
468 | int r; |
469 | ||
470 | if (is_long_mode(vcpu) || !is_pae(vcpu)) | |
471 | return false; | |
472 | ||
6de4f3ad AK |
473 | if (!test_bit(VCPU_EXREG_PDPTR, |
474 | (unsigned long *)&vcpu->arch.regs_avail)) | |
475 | return true; | |
476 | ||
9f8fe504 AK |
477 | gfn = (kvm_read_cr3(vcpu) & ~31u) >> PAGE_SHIFT; |
478 | offset = (kvm_read_cr3(vcpu) & ~31u) & (PAGE_SIZE - 1); | |
3d06b8bf JR |
479 | r = kvm_read_nested_guest_page(vcpu, gfn, pdpte, offset, sizeof(pdpte), |
480 | PFERR_USER_MASK | PFERR_WRITE_MASK); | |
d835dfec AK |
481 | if (r < 0) |
482 | goto out; | |
ff03a073 | 483 | changed = memcmp(pdpte, vcpu->arch.walk_mmu->pdptrs, sizeof(pdpte)) != 0; |
d835dfec | 484 | out: |
d835dfec AK |
485 | |
486 | return changed; | |
487 | } | |
488 | ||
49a9b07e | 489 | int kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) |
a03490ed | 490 | { |
aad82703 SY |
491 | unsigned long old_cr0 = kvm_read_cr0(vcpu); |
492 | unsigned long update_bits = X86_CR0_PG | X86_CR0_WP | | |
493 | X86_CR0_CD | X86_CR0_NW; | |
494 | ||
f9a48e6a AK |
495 | cr0 |= X86_CR0_ET; |
496 | ||
ab344828 | 497 | #ifdef CONFIG_X86_64 |
0f12244f GN |
498 | if (cr0 & 0xffffffff00000000UL) |
499 | return 1; | |
ab344828 GN |
500 | #endif |
501 | ||
502 | cr0 &= ~CR0_RESERVED_BITS; | |
a03490ed | 503 | |
0f12244f GN |
504 | if ((cr0 & X86_CR0_NW) && !(cr0 & X86_CR0_CD)) |
505 | return 1; | |
a03490ed | 506 | |
0f12244f GN |
507 | if ((cr0 & X86_CR0_PG) && !(cr0 & X86_CR0_PE)) |
508 | return 1; | |
a03490ed CO |
509 | |
510 | if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) { | |
511 | #ifdef CONFIG_X86_64 | |
f6801dff | 512 | if ((vcpu->arch.efer & EFER_LME)) { |
a03490ed CO |
513 | int cs_db, cs_l; |
514 | ||
0f12244f GN |
515 | if (!is_pae(vcpu)) |
516 | return 1; | |
a03490ed | 517 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); |
0f12244f GN |
518 | if (cs_l) |
519 | return 1; | |
a03490ed CO |
520 | } else |
521 | #endif | |
ff03a073 | 522 | if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->arch.walk_mmu, |
9f8fe504 | 523 | kvm_read_cr3(vcpu))) |
0f12244f | 524 | return 1; |
a03490ed CO |
525 | } |
526 | ||
527 | kvm_x86_ops->set_cr0(vcpu, cr0); | |
a03490ed | 528 | |
d170c419 | 529 | if ((cr0 ^ old_cr0) & X86_CR0_PG) { |
e5f3f027 | 530 | kvm_clear_async_pf_completion_queue(vcpu); |
d170c419 LJ |
531 | kvm_async_pf_hash_reset(vcpu); |
532 | } | |
e5f3f027 | 533 | |
aad82703 SY |
534 | if ((cr0 ^ old_cr0) & update_bits) |
535 | kvm_mmu_reset_context(vcpu); | |
0f12244f GN |
536 | return 0; |
537 | } | |
2d3ad1f4 | 538 | EXPORT_SYMBOL_GPL(kvm_set_cr0); |
a03490ed | 539 | |
2d3ad1f4 | 540 | void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw) |
a03490ed | 541 | { |
49a9b07e | 542 | (void)kvm_set_cr0(vcpu, kvm_read_cr0_bits(vcpu, ~0x0eul) | (msw & 0x0f)); |
a03490ed | 543 | } |
2d3ad1f4 | 544 | EXPORT_SYMBOL_GPL(kvm_lmsw); |
a03490ed | 545 | |
2acf923e DC |
546 | int __kvm_set_xcr(struct kvm_vcpu *vcpu, u32 index, u64 xcr) |
547 | { | |
548 | u64 xcr0; | |
549 | ||
550 | /* Only support XCR_XFEATURE_ENABLED_MASK(xcr0) now */ | |
551 | if (index != XCR_XFEATURE_ENABLED_MASK) | |
552 | return 1; | |
553 | xcr0 = xcr; | |
554 | if (kvm_x86_ops->get_cpl(vcpu) != 0) | |
555 | return 1; | |
556 | if (!(xcr0 & XSTATE_FP)) | |
557 | return 1; | |
558 | if ((xcr0 & XSTATE_YMM) && !(xcr0 & XSTATE_SSE)) | |
559 | return 1; | |
560 | if (xcr0 & ~host_xcr0) | |
561 | return 1; | |
562 | vcpu->arch.xcr0 = xcr0; | |
563 | vcpu->guest_xcr0_loaded = 0; | |
564 | return 0; | |
565 | } | |
566 | ||
567 | int kvm_set_xcr(struct kvm_vcpu *vcpu, u32 index, u64 xcr) | |
568 | { | |
569 | if (__kvm_set_xcr(vcpu, index, xcr)) { | |
570 | kvm_inject_gp(vcpu, 0); | |
571 | return 1; | |
572 | } | |
573 | return 0; | |
574 | } | |
575 | EXPORT_SYMBOL_GPL(kvm_set_xcr); | |
576 | ||
577 | static bool guest_cpuid_has_xsave(struct kvm_vcpu *vcpu) | |
578 | { | |
579 | struct kvm_cpuid_entry2 *best; | |
580 | ||
581 | best = kvm_find_cpuid_entry(vcpu, 1, 0); | |
582 | return best && (best->ecx & bit(X86_FEATURE_XSAVE)); | |
583 | } | |
584 | ||
c68b734f YW |
585 | static bool guest_cpuid_has_smep(struct kvm_vcpu *vcpu) |
586 | { | |
587 | struct kvm_cpuid_entry2 *best; | |
588 | ||
589 | best = kvm_find_cpuid_entry(vcpu, 7, 0); | |
590 | return best && (best->ebx & bit(X86_FEATURE_SMEP)); | |
591 | } | |
592 | ||
74dc2b4f YW |
593 | static bool guest_cpuid_has_fsgsbase(struct kvm_vcpu *vcpu) |
594 | { | |
595 | struct kvm_cpuid_entry2 *best; | |
596 | ||
597 | best = kvm_find_cpuid_entry(vcpu, 7, 0); | |
598 | return best && (best->ebx & bit(X86_FEATURE_FSGSBASE)); | |
599 | } | |
600 | ||
2acf923e DC |
601 | static void update_cpuid(struct kvm_vcpu *vcpu) |
602 | { | |
603 | struct kvm_cpuid_entry2 *best; | |
a3e06bbe | 604 | struct kvm_lapic *apic = vcpu->arch.apic; |
2acf923e DC |
605 | |
606 | best = kvm_find_cpuid_entry(vcpu, 1, 0); | |
607 | if (!best) | |
608 | return; | |
609 | ||
610 | /* Update OSXSAVE bit */ | |
611 | if (cpu_has_xsave && best->function == 0x1) { | |
612 | best->ecx &= ~(bit(X86_FEATURE_OSXSAVE)); | |
613 | if (kvm_read_cr4_bits(vcpu, X86_CR4_OSXSAVE)) | |
614 | best->ecx |= bit(X86_FEATURE_OSXSAVE); | |
615 | } | |
a3e06bbe | 616 | |
4d25a066 JK |
617 | if (apic) { |
618 | if (best->ecx & bit(X86_FEATURE_TSC_DEADLINE_TIMER)) | |
619 | apic->lapic_timer.timer_mode_mask = 3 << 17; | |
620 | else | |
621 | apic->lapic_timer.timer_mode_mask = 1 << 17; | |
622 | } | |
2acf923e DC |
623 | } |
624 | ||
a83b29c6 | 625 | int kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4) |
a03490ed | 626 | { |
fc78f519 | 627 | unsigned long old_cr4 = kvm_read_cr4(vcpu); |
c68b734f YW |
628 | unsigned long pdptr_bits = X86_CR4_PGE | X86_CR4_PSE | |
629 | X86_CR4_PAE | X86_CR4_SMEP; | |
0f12244f GN |
630 | if (cr4 & CR4_RESERVED_BITS) |
631 | return 1; | |
a03490ed | 632 | |
2acf923e DC |
633 | if (!guest_cpuid_has_xsave(vcpu) && (cr4 & X86_CR4_OSXSAVE)) |
634 | return 1; | |
635 | ||
c68b734f YW |
636 | if (!guest_cpuid_has_smep(vcpu) && (cr4 & X86_CR4_SMEP)) |
637 | return 1; | |
638 | ||
74dc2b4f YW |
639 | if (!guest_cpuid_has_fsgsbase(vcpu) && (cr4 & X86_CR4_RDWRGSFS)) |
640 | return 1; | |
641 | ||
a03490ed | 642 | if (is_long_mode(vcpu)) { |
0f12244f GN |
643 | if (!(cr4 & X86_CR4_PAE)) |
644 | return 1; | |
a2edf57f AK |
645 | } else if (is_paging(vcpu) && (cr4 & X86_CR4_PAE) |
646 | && ((cr4 ^ old_cr4) & pdptr_bits) | |
9f8fe504 AK |
647 | && !load_pdptrs(vcpu, vcpu->arch.walk_mmu, |
648 | kvm_read_cr3(vcpu))) | |
0f12244f GN |
649 | return 1; |
650 | ||
5e1746d6 | 651 | if (kvm_x86_ops->set_cr4(vcpu, cr4)) |
0f12244f | 652 | return 1; |
a03490ed | 653 | |
aad82703 SY |
654 | if ((cr4 ^ old_cr4) & pdptr_bits) |
655 | kvm_mmu_reset_context(vcpu); | |
0f12244f | 656 | |
2acf923e DC |
657 | if ((cr4 ^ old_cr4) & X86_CR4_OSXSAVE) |
658 | update_cpuid(vcpu); | |
659 | ||
0f12244f GN |
660 | return 0; |
661 | } | |
2d3ad1f4 | 662 | EXPORT_SYMBOL_GPL(kvm_set_cr4); |
a03490ed | 663 | |
2390218b | 664 | int kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3) |
a03490ed | 665 | { |
9f8fe504 | 666 | if (cr3 == kvm_read_cr3(vcpu) && !pdptrs_changed(vcpu)) { |
0ba73cda | 667 | kvm_mmu_sync_roots(vcpu); |
d835dfec | 668 | kvm_mmu_flush_tlb(vcpu); |
0f12244f | 669 | return 0; |
d835dfec AK |
670 | } |
671 | ||
a03490ed | 672 | if (is_long_mode(vcpu)) { |
0f12244f GN |
673 | if (cr3 & CR3_L_MODE_RESERVED_BITS) |
674 | return 1; | |
a03490ed CO |
675 | } else { |
676 | if (is_pae(vcpu)) { | |
0f12244f GN |
677 | if (cr3 & CR3_PAE_RESERVED_BITS) |
678 | return 1; | |
ff03a073 JR |
679 | if (is_paging(vcpu) && |
680 | !load_pdptrs(vcpu, vcpu->arch.walk_mmu, cr3)) | |
0f12244f | 681 | return 1; |
a03490ed CO |
682 | } |
683 | /* | |
684 | * We don't check reserved bits in nonpae mode, because | |
685 | * this isn't enforced, and VMware depends on this. | |
686 | */ | |
687 | } | |
688 | ||
a03490ed CO |
689 | /* |
690 | * Does the new cr3 value map to physical memory? (Note, we | |
691 | * catch an invalid cr3 even in real-mode, because it would | |
692 | * cause trouble later on when we turn on paging anyway.) | |
693 | * | |
694 | * A real CPU would silently accept an invalid cr3 and would | |
695 | * attempt to use it - with largely undefined (and often hard | |
696 | * to debug) behavior on the guest side. | |
697 | */ | |
698 | if (unlikely(!gfn_to_memslot(vcpu->kvm, cr3 >> PAGE_SHIFT))) | |
0f12244f GN |
699 | return 1; |
700 | vcpu->arch.cr3 = cr3; | |
aff48baa | 701 | __set_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail); |
0f12244f GN |
702 | vcpu->arch.mmu.new_cr3(vcpu); |
703 | return 0; | |
704 | } | |
2d3ad1f4 | 705 | EXPORT_SYMBOL_GPL(kvm_set_cr3); |
a03490ed | 706 | |
eea1cff9 | 707 | int kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8) |
a03490ed | 708 | { |
0f12244f GN |
709 | if (cr8 & CR8_RESERVED_BITS) |
710 | return 1; | |
a03490ed CO |
711 | if (irqchip_in_kernel(vcpu->kvm)) |
712 | kvm_lapic_set_tpr(vcpu, cr8); | |
713 | else | |
ad312c7c | 714 | vcpu->arch.cr8 = cr8; |
0f12244f GN |
715 | return 0; |
716 | } | |
2d3ad1f4 | 717 | EXPORT_SYMBOL_GPL(kvm_set_cr8); |
a03490ed | 718 | |
2d3ad1f4 | 719 | unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu) |
a03490ed CO |
720 | { |
721 | if (irqchip_in_kernel(vcpu->kvm)) | |
722 | return kvm_lapic_get_cr8(vcpu); | |
723 | else | |
ad312c7c | 724 | return vcpu->arch.cr8; |
a03490ed | 725 | } |
2d3ad1f4 | 726 | EXPORT_SYMBOL_GPL(kvm_get_cr8); |
a03490ed | 727 | |
338dbc97 | 728 | static int __kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val) |
020df079 GN |
729 | { |
730 | switch (dr) { | |
731 | case 0 ... 3: | |
732 | vcpu->arch.db[dr] = val; | |
733 | if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)) | |
734 | vcpu->arch.eff_db[dr] = val; | |
735 | break; | |
736 | case 4: | |
338dbc97 GN |
737 | if (kvm_read_cr4_bits(vcpu, X86_CR4_DE)) |
738 | return 1; /* #UD */ | |
020df079 GN |
739 | /* fall through */ |
740 | case 6: | |
338dbc97 GN |
741 | if (val & 0xffffffff00000000ULL) |
742 | return -1; /* #GP */ | |
020df079 GN |
743 | vcpu->arch.dr6 = (val & DR6_VOLATILE) | DR6_FIXED_1; |
744 | break; | |
745 | case 5: | |
338dbc97 GN |
746 | if (kvm_read_cr4_bits(vcpu, X86_CR4_DE)) |
747 | return 1; /* #UD */ | |
020df079 GN |
748 | /* fall through */ |
749 | default: /* 7 */ | |
338dbc97 GN |
750 | if (val & 0xffffffff00000000ULL) |
751 | return -1; /* #GP */ | |
020df079 GN |
752 | vcpu->arch.dr7 = (val & DR7_VOLATILE) | DR7_FIXED_1; |
753 | if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)) { | |
754 | kvm_x86_ops->set_dr7(vcpu, vcpu->arch.dr7); | |
755 | vcpu->arch.switch_db_regs = (val & DR7_BP_EN_MASK); | |
756 | } | |
757 | break; | |
758 | } | |
759 | ||
760 | return 0; | |
761 | } | |
338dbc97 GN |
762 | |
763 | int kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val) | |
764 | { | |
765 | int res; | |
766 | ||
767 | res = __kvm_set_dr(vcpu, dr, val); | |
768 | if (res > 0) | |
769 | kvm_queue_exception(vcpu, UD_VECTOR); | |
770 | else if (res < 0) | |
771 | kvm_inject_gp(vcpu, 0); | |
772 | ||
773 | return res; | |
774 | } | |
020df079 GN |
775 | EXPORT_SYMBOL_GPL(kvm_set_dr); |
776 | ||
338dbc97 | 777 | static int _kvm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *val) |
020df079 GN |
778 | { |
779 | switch (dr) { | |
780 | case 0 ... 3: | |
781 | *val = vcpu->arch.db[dr]; | |
782 | break; | |
783 | case 4: | |
338dbc97 | 784 | if (kvm_read_cr4_bits(vcpu, X86_CR4_DE)) |
020df079 | 785 | return 1; |
020df079 GN |
786 | /* fall through */ |
787 | case 6: | |
788 | *val = vcpu->arch.dr6; | |
789 | break; | |
790 | case 5: | |
338dbc97 | 791 | if (kvm_read_cr4_bits(vcpu, X86_CR4_DE)) |
020df079 | 792 | return 1; |
020df079 GN |
793 | /* fall through */ |
794 | default: /* 7 */ | |
795 | *val = vcpu->arch.dr7; | |
796 | break; | |
797 | } | |
798 | ||
799 | return 0; | |
800 | } | |
338dbc97 GN |
801 | |
802 | int kvm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *val) | |
803 | { | |
804 | if (_kvm_get_dr(vcpu, dr, val)) { | |
805 | kvm_queue_exception(vcpu, UD_VECTOR); | |
806 | return 1; | |
807 | } | |
808 | return 0; | |
809 | } | |
020df079 GN |
810 | EXPORT_SYMBOL_GPL(kvm_get_dr); |
811 | ||
043405e1 CO |
812 | /* |
813 | * List of msr numbers which we expose to userspace through KVM_GET_MSRS | |
814 | * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST. | |
815 | * | |
816 | * This list is modified at module load time to reflect the | |
e3267cbb GC |
817 | * capabilities of the host cpu. This capabilities test skips MSRs that are |
818 | * kvm-specific. Those are put in the beginning of the list. | |
043405e1 | 819 | */ |
e3267cbb | 820 | |
c9aaa895 | 821 | #define KVM_SAVE_MSRS_BEGIN 9 |
043405e1 | 822 | static u32 msrs_to_save[] = { |
e3267cbb | 823 | MSR_KVM_SYSTEM_TIME, MSR_KVM_WALL_CLOCK, |
11c6bffa | 824 | MSR_KVM_SYSTEM_TIME_NEW, MSR_KVM_WALL_CLOCK_NEW, |
55cd8e5a | 825 | HV_X64_MSR_GUEST_OS_ID, HV_X64_MSR_HYPERCALL, |
c9aaa895 | 826 | HV_X64_MSR_APIC_ASSIST_PAGE, MSR_KVM_ASYNC_PF_EN, MSR_KVM_STEAL_TIME, |
043405e1 | 827 | MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP, |
8c06585d | 828 | MSR_STAR, |
043405e1 CO |
829 | #ifdef CONFIG_X86_64 |
830 | MSR_CSTAR, MSR_KERNEL_GS_BASE, MSR_SYSCALL_MASK, MSR_LSTAR, | |
831 | #endif | |
e90aa41e | 832 | MSR_IA32_TSC, MSR_IA32_CR_PAT, MSR_VM_HSAVE_PA |
043405e1 CO |
833 | }; |
834 | ||
835 | static unsigned num_msrs_to_save; | |
836 | ||
837 | static u32 emulated_msrs[] = { | |
a3e06bbe | 838 | MSR_IA32_TSCDEADLINE, |
043405e1 | 839 | MSR_IA32_MISC_ENABLE, |
908e75f3 AK |
840 | MSR_IA32_MCG_STATUS, |
841 | MSR_IA32_MCG_CTL, | |
043405e1 CO |
842 | }; |
843 | ||
b69e8cae | 844 | static int set_efer(struct kvm_vcpu *vcpu, u64 efer) |
15c4a640 | 845 | { |
aad82703 SY |
846 | u64 old_efer = vcpu->arch.efer; |
847 | ||
b69e8cae RJ |
848 | if (efer & efer_reserved_bits) |
849 | return 1; | |
15c4a640 CO |
850 | |
851 | if (is_paging(vcpu) | |
b69e8cae RJ |
852 | && (vcpu->arch.efer & EFER_LME) != (efer & EFER_LME)) |
853 | return 1; | |
15c4a640 | 854 | |
1b2fd70c AG |
855 | if (efer & EFER_FFXSR) { |
856 | struct kvm_cpuid_entry2 *feat; | |
857 | ||
858 | feat = kvm_find_cpuid_entry(vcpu, 0x80000001, 0); | |
b69e8cae RJ |
859 | if (!feat || !(feat->edx & bit(X86_FEATURE_FXSR_OPT))) |
860 | return 1; | |
1b2fd70c AG |
861 | } |
862 | ||
d8017474 AG |
863 | if (efer & EFER_SVME) { |
864 | struct kvm_cpuid_entry2 *feat; | |
865 | ||
866 | feat = kvm_find_cpuid_entry(vcpu, 0x80000001, 0); | |
b69e8cae RJ |
867 | if (!feat || !(feat->ecx & bit(X86_FEATURE_SVM))) |
868 | return 1; | |
d8017474 AG |
869 | } |
870 | ||
15c4a640 | 871 | efer &= ~EFER_LMA; |
f6801dff | 872 | efer |= vcpu->arch.efer & EFER_LMA; |
15c4a640 | 873 | |
a3d204e2 SY |
874 | kvm_x86_ops->set_efer(vcpu, efer); |
875 | ||
9645bb56 | 876 | vcpu->arch.mmu.base_role.nxe = (efer & EFER_NX) && !tdp_enabled; |
b69e8cae | 877 | |
aad82703 SY |
878 | /* Update reserved bits */ |
879 | if ((efer ^ old_efer) & EFER_NX) | |
880 | kvm_mmu_reset_context(vcpu); | |
881 | ||
b69e8cae | 882 | return 0; |
15c4a640 CO |
883 | } |
884 | ||
f2b4b7dd JR |
885 | void kvm_enable_efer_bits(u64 mask) |
886 | { | |
887 | efer_reserved_bits &= ~mask; | |
888 | } | |
889 | EXPORT_SYMBOL_GPL(kvm_enable_efer_bits); | |
890 | ||
891 | ||
15c4a640 CO |
892 | /* |
893 | * Writes msr value into into the appropriate "register". | |
894 | * Returns 0 on success, non-0 otherwise. | |
895 | * Assumes vcpu_load() was already called. | |
896 | */ | |
897 | int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data) | |
898 | { | |
899 | return kvm_x86_ops->set_msr(vcpu, msr_index, data); | |
900 | } | |
901 | ||
313a3dc7 CO |
902 | /* |
903 | * Adapt set_msr() to msr_io()'s calling convention | |
904 | */ | |
905 | static int do_set_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data) | |
906 | { | |
907 | return kvm_set_msr(vcpu, index, *data); | |
908 | } | |
909 | ||
18068523 GOC |
910 | static void kvm_write_wall_clock(struct kvm *kvm, gpa_t wall_clock) |
911 | { | |
9ed3c444 AK |
912 | int version; |
913 | int r; | |
50d0a0f9 | 914 | struct pvclock_wall_clock wc; |
923de3cf | 915 | struct timespec boot; |
18068523 GOC |
916 | |
917 | if (!wall_clock) | |
918 | return; | |
919 | ||
9ed3c444 AK |
920 | r = kvm_read_guest(kvm, wall_clock, &version, sizeof(version)); |
921 | if (r) | |
922 | return; | |
923 | ||
924 | if (version & 1) | |
925 | ++version; /* first time write, random junk */ | |
926 | ||
927 | ++version; | |
18068523 | 928 | |
18068523 GOC |
929 | kvm_write_guest(kvm, wall_clock, &version, sizeof(version)); |
930 | ||
50d0a0f9 GH |
931 | /* |
932 | * The guest calculates current wall clock time by adding | |
34c238a1 | 933 | * system time (updated by kvm_guest_time_update below) to the |
50d0a0f9 GH |
934 | * wall clock specified here. guest system time equals host |
935 | * system time for us, thus we must fill in host boot time here. | |
936 | */ | |
923de3cf | 937 | getboottime(&boot); |
50d0a0f9 GH |
938 | |
939 | wc.sec = boot.tv_sec; | |
940 | wc.nsec = boot.tv_nsec; | |
941 | wc.version = version; | |
18068523 GOC |
942 | |
943 | kvm_write_guest(kvm, wall_clock, &wc, sizeof(wc)); | |
944 | ||
945 | version++; | |
946 | kvm_write_guest(kvm, wall_clock, &version, sizeof(version)); | |
18068523 GOC |
947 | } |
948 | ||
50d0a0f9 GH |
949 | static uint32_t div_frac(uint32_t dividend, uint32_t divisor) |
950 | { | |
951 | uint32_t quotient, remainder; | |
952 | ||
953 | /* Don't try to replace with do_div(), this one calculates | |
954 | * "(dividend << 32) / divisor" */ | |
955 | __asm__ ( "divl %4" | |
956 | : "=a" (quotient), "=d" (remainder) | |
957 | : "0" (0), "1" (dividend), "r" (divisor) ); | |
958 | return quotient; | |
959 | } | |
960 | ||
5f4e3f88 ZA |
961 | static void kvm_get_time_scale(uint32_t scaled_khz, uint32_t base_khz, |
962 | s8 *pshift, u32 *pmultiplier) | |
50d0a0f9 | 963 | { |
5f4e3f88 | 964 | uint64_t scaled64; |
50d0a0f9 GH |
965 | int32_t shift = 0; |
966 | uint64_t tps64; | |
967 | uint32_t tps32; | |
968 | ||
5f4e3f88 ZA |
969 | tps64 = base_khz * 1000LL; |
970 | scaled64 = scaled_khz * 1000LL; | |
50933623 | 971 | while (tps64 > scaled64*2 || tps64 & 0xffffffff00000000ULL) { |
50d0a0f9 GH |
972 | tps64 >>= 1; |
973 | shift--; | |
974 | } | |
975 | ||
976 | tps32 = (uint32_t)tps64; | |
50933623 JK |
977 | while (tps32 <= scaled64 || scaled64 & 0xffffffff00000000ULL) { |
978 | if (scaled64 & 0xffffffff00000000ULL || tps32 & 0x80000000) | |
5f4e3f88 ZA |
979 | scaled64 >>= 1; |
980 | else | |
981 | tps32 <<= 1; | |
50d0a0f9 GH |
982 | shift++; |
983 | } | |
984 | ||
5f4e3f88 ZA |
985 | *pshift = shift; |
986 | *pmultiplier = div_frac(scaled64, tps32); | |
50d0a0f9 | 987 | |
5f4e3f88 ZA |
988 | pr_debug("%s: base_khz %u => %u, shift %d, mul %u\n", |
989 | __func__, base_khz, scaled_khz, shift, *pmultiplier); | |
50d0a0f9 GH |
990 | } |
991 | ||
759379dd ZA |
992 | static inline u64 get_kernel_ns(void) |
993 | { | |
994 | struct timespec ts; | |
995 | ||
996 | WARN_ON(preemptible()); | |
997 | ktime_get_ts(&ts); | |
998 | monotonic_to_bootbased(&ts); | |
999 | return timespec_to_ns(&ts); | |
50d0a0f9 GH |
1000 | } |
1001 | ||
c8076604 | 1002 | static DEFINE_PER_CPU(unsigned long, cpu_tsc_khz); |
c285545f | 1003 | unsigned long max_tsc_khz; |
c8076604 | 1004 | |
8cfdc000 ZA |
1005 | static inline int kvm_tsc_changes_freq(void) |
1006 | { | |
1007 | int cpu = get_cpu(); | |
1008 | int ret = !boot_cpu_has(X86_FEATURE_CONSTANT_TSC) && | |
1009 | cpufreq_quick_get(cpu) != 0; | |
1010 | put_cpu(); | |
1011 | return ret; | |
1012 | } | |
1013 | ||
a3e06bbe | 1014 | u64 vcpu_tsc_khz(struct kvm_vcpu *vcpu) |
1e993611 JR |
1015 | { |
1016 | if (vcpu->arch.virtual_tsc_khz) | |
1017 | return vcpu->arch.virtual_tsc_khz; | |
1018 | else | |
1019 | return __this_cpu_read(cpu_tsc_khz); | |
1020 | } | |
1021 | ||
857e4099 | 1022 | static inline u64 nsec_to_cycles(struct kvm_vcpu *vcpu, u64 nsec) |
759379dd | 1023 | { |
217fc9cf AK |
1024 | u64 ret; |
1025 | ||
759379dd ZA |
1026 | WARN_ON(preemptible()); |
1027 | if (kvm_tsc_changes_freq()) | |
1028 | printk_once(KERN_WARNING | |
1029 | "kvm: unreliable cycle conversion on adjustable rate TSC\n"); | |
857e4099 | 1030 | ret = nsec * vcpu_tsc_khz(vcpu); |
217fc9cf AK |
1031 | do_div(ret, USEC_PER_SEC); |
1032 | return ret; | |
759379dd ZA |
1033 | } |
1034 | ||
1e993611 | 1035 | static void kvm_init_tsc_catchup(struct kvm_vcpu *vcpu, u32 this_tsc_khz) |
c285545f ZA |
1036 | { |
1037 | /* Compute a scale to convert nanoseconds in TSC cycles */ | |
1038 | kvm_get_time_scale(this_tsc_khz, NSEC_PER_SEC / 1000, | |
1e993611 JR |
1039 | &vcpu->arch.tsc_catchup_shift, |
1040 | &vcpu->arch.tsc_catchup_mult); | |
c285545f ZA |
1041 | } |
1042 | ||
1043 | static u64 compute_guest_tsc(struct kvm_vcpu *vcpu, s64 kernel_ns) | |
1044 | { | |
1045 | u64 tsc = pvclock_scale_delta(kernel_ns-vcpu->arch.last_tsc_nsec, | |
1e993611 JR |
1046 | vcpu->arch.tsc_catchup_mult, |
1047 | vcpu->arch.tsc_catchup_shift); | |
c285545f ZA |
1048 | tsc += vcpu->arch.last_tsc_write; |
1049 | return tsc; | |
1050 | } | |
1051 | ||
99e3e30a ZA |
1052 | void kvm_write_tsc(struct kvm_vcpu *vcpu, u64 data) |
1053 | { | |
1054 | struct kvm *kvm = vcpu->kvm; | |
f38e098f | 1055 | u64 offset, ns, elapsed; |
99e3e30a | 1056 | unsigned long flags; |
46543ba4 | 1057 | s64 sdiff; |
99e3e30a | 1058 | |
038f8c11 | 1059 | raw_spin_lock_irqsave(&kvm->arch.tsc_write_lock, flags); |
857e4099 | 1060 | offset = kvm_x86_ops->compute_tsc_offset(vcpu, data); |
759379dd | 1061 | ns = get_kernel_ns(); |
f38e098f | 1062 | elapsed = ns - kvm->arch.last_tsc_nsec; |
46543ba4 ZA |
1063 | sdiff = data - kvm->arch.last_tsc_write; |
1064 | if (sdiff < 0) | |
1065 | sdiff = -sdiff; | |
f38e098f ZA |
1066 | |
1067 | /* | |
46543ba4 | 1068 | * Special case: close write to TSC within 5 seconds of |
f38e098f | 1069 | * another CPU is interpreted as an attempt to synchronize |
0d2eb44f | 1070 | * The 5 seconds is to accommodate host load / swapping as |
46543ba4 | 1071 | * well as any reset of TSC during the boot process. |
f38e098f ZA |
1072 | * |
1073 | * In that case, for a reliable TSC, we can match TSC offsets, | |
46543ba4 | 1074 | * or make a best guest using elapsed value. |
f38e098f | 1075 | */ |
857e4099 | 1076 | if (sdiff < nsec_to_cycles(vcpu, 5ULL * NSEC_PER_SEC) && |
46543ba4 | 1077 | elapsed < 5ULL * NSEC_PER_SEC) { |
f38e098f ZA |
1078 | if (!check_tsc_unstable()) { |
1079 | offset = kvm->arch.last_tsc_offset; | |
1080 | pr_debug("kvm: matched tsc offset for %llu\n", data); | |
1081 | } else { | |
857e4099 | 1082 | u64 delta = nsec_to_cycles(vcpu, elapsed); |
759379dd ZA |
1083 | offset += delta; |
1084 | pr_debug("kvm: adjusted tsc offset by %llu\n", delta); | |
f38e098f ZA |
1085 | } |
1086 | ns = kvm->arch.last_tsc_nsec; | |
1087 | } | |
1088 | kvm->arch.last_tsc_nsec = ns; | |
1089 | kvm->arch.last_tsc_write = data; | |
1090 | kvm->arch.last_tsc_offset = offset; | |
99e3e30a | 1091 | kvm_x86_ops->write_tsc_offset(vcpu, offset); |
038f8c11 | 1092 | raw_spin_unlock_irqrestore(&kvm->arch.tsc_write_lock, flags); |
99e3e30a ZA |
1093 | |
1094 | /* Reset of TSC must disable overshoot protection below */ | |
1095 | vcpu->arch.hv_clock.tsc_timestamp = 0; | |
c285545f ZA |
1096 | vcpu->arch.last_tsc_write = data; |
1097 | vcpu->arch.last_tsc_nsec = ns; | |
99e3e30a ZA |
1098 | } |
1099 | EXPORT_SYMBOL_GPL(kvm_write_tsc); | |
1100 | ||
34c238a1 | 1101 | static int kvm_guest_time_update(struct kvm_vcpu *v) |
18068523 | 1102 | { |
18068523 GOC |
1103 | unsigned long flags; |
1104 | struct kvm_vcpu_arch *vcpu = &v->arch; | |
1105 | void *shared_kaddr; | |
463656c0 | 1106 | unsigned long this_tsc_khz; |
1d5f066e ZA |
1107 | s64 kernel_ns, max_kernel_ns; |
1108 | u64 tsc_timestamp; | |
18068523 | 1109 | |
18068523 GOC |
1110 | /* Keep irq disabled to prevent changes to the clock */ |
1111 | local_irq_save(flags); | |
d5c1785d | 1112 | tsc_timestamp = kvm_x86_ops->read_l1_tsc(v); |
759379dd | 1113 | kernel_ns = get_kernel_ns(); |
1e993611 | 1114 | this_tsc_khz = vcpu_tsc_khz(v); |
8cfdc000 | 1115 | if (unlikely(this_tsc_khz == 0)) { |
c285545f | 1116 | local_irq_restore(flags); |
34c238a1 | 1117 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, v); |
8cfdc000 ZA |
1118 | return 1; |
1119 | } | |
18068523 | 1120 | |
c285545f ZA |
1121 | /* |
1122 | * We may have to catch up the TSC to match elapsed wall clock | |
1123 | * time for two reasons, even if kvmclock is used. | |
1124 | * 1) CPU could have been running below the maximum TSC rate | |
1125 | * 2) Broken TSC compensation resets the base at each VCPU | |
1126 | * entry to avoid unknown leaps of TSC even when running | |
1127 | * again on the same CPU. This may cause apparent elapsed | |
1128 | * time to disappear, and the guest to stand still or run | |
1129 | * very slowly. | |
1130 | */ | |
1131 | if (vcpu->tsc_catchup) { | |
1132 | u64 tsc = compute_guest_tsc(v, kernel_ns); | |
1133 | if (tsc > tsc_timestamp) { | |
1134 | kvm_x86_ops->adjust_tsc_offset(v, tsc - tsc_timestamp); | |
1135 | tsc_timestamp = tsc; | |
1136 | } | |
50d0a0f9 GH |
1137 | } |
1138 | ||
18068523 GOC |
1139 | local_irq_restore(flags); |
1140 | ||
c285545f ZA |
1141 | if (!vcpu->time_page) |
1142 | return 0; | |
18068523 | 1143 | |
1d5f066e ZA |
1144 | /* |
1145 | * Time as measured by the TSC may go backwards when resetting the base | |
1146 | * tsc_timestamp. The reason for this is that the TSC resolution is | |
1147 | * higher than the resolution of the other clock scales. Thus, many | |
1148 | * possible measurments of the TSC correspond to one measurement of any | |
1149 | * other clock, and so a spread of values is possible. This is not a | |
1150 | * problem for the computation of the nanosecond clock; with TSC rates | |
1151 | * around 1GHZ, there can only be a few cycles which correspond to one | |
1152 | * nanosecond value, and any path through this code will inevitably | |
1153 | * take longer than that. However, with the kernel_ns value itself, | |
1154 | * the precision may be much lower, down to HZ granularity. If the | |
1155 | * first sampling of TSC against kernel_ns ends in the low part of the | |
1156 | * range, and the second in the high end of the range, we can get: | |
1157 | * | |
1158 | * (TSC - offset_low) * S + kns_old > (TSC - offset_high) * S + kns_new | |
1159 | * | |
1160 | * As the sampling errors potentially range in the thousands of cycles, | |
1161 | * it is possible such a time value has already been observed by the | |
1162 | * guest. To protect against this, we must compute the system time as | |
1163 | * observed by the guest and ensure the new system time is greater. | |
1164 | */ | |
1165 | max_kernel_ns = 0; | |
1166 | if (vcpu->hv_clock.tsc_timestamp && vcpu->last_guest_tsc) { | |
1167 | max_kernel_ns = vcpu->last_guest_tsc - | |
1168 | vcpu->hv_clock.tsc_timestamp; | |
1169 | max_kernel_ns = pvclock_scale_delta(max_kernel_ns, | |
1170 | vcpu->hv_clock.tsc_to_system_mul, | |
1171 | vcpu->hv_clock.tsc_shift); | |
1172 | max_kernel_ns += vcpu->last_kernel_ns; | |
1173 | } | |
afbcf7ab | 1174 | |
e48672fa | 1175 | if (unlikely(vcpu->hw_tsc_khz != this_tsc_khz)) { |
5f4e3f88 ZA |
1176 | kvm_get_time_scale(NSEC_PER_SEC / 1000, this_tsc_khz, |
1177 | &vcpu->hv_clock.tsc_shift, | |
1178 | &vcpu->hv_clock.tsc_to_system_mul); | |
e48672fa | 1179 | vcpu->hw_tsc_khz = this_tsc_khz; |
8cfdc000 ZA |
1180 | } |
1181 | ||
1d5f066e ZA |
1182 | if (max_kernel_ns > kernel_ns) |
1183 | kernel_ns = max_kernel_ns; | |
1184 | ||
8cfdc000 | 1185 | /* With all the info we got, fill in the values */ |
1d5f066e | 1186 | vcpu->hv_clock.tsc_timestamp = tsc_timestamp; |
759379dd | 1187 | vcpu->hv_clock.system_time = kernel_ns + v->kvm->arch.kvmclock_offset; |
1d5f066e | 1188 | vcpu->last_kernel_ns = kernel_ns; |
28e4639a | 1189 | vcpu->last_guest_tsc = tsc_timestamp; |
371bcf64 GC |
1190 | vcpu->hv_clock.flags = 0; |
1191 | ||
18068523 GOC |
1192 | /* |
1193 | * The interface expects us to write an even number signaling that the | |
1194 | * update is finished. Since the guest won't see the intermediate | |
50d0a0f9 | 1195 | * state, we just increase by 2 at the end. |
18068523 | 1196 | */ |
50d0a0f9 | 1197 | vcpu->hv_clock.version += 2; |
18068523 GOC |
1198 | |
1199 | shared_kaddr = kmap_atomic(vcpu->time_page, KM_USER0); | |
1200 | ||
1201 | memcpy(shared_kaddr + vcpu->time_offset, &vcpu->hv_clock, | |
50d0a0f9 | 1202 | sizeof(vcpu->hv_clock)); |
18068523 GOC |
1203 | |
1204 | kunmap_atomic(shared_kaddr, KM_USER0); | |
1205 | ||
1206 | mark_page_dirty(v->kvm, vcpu->time >> PAGE_SHIFT); | |
8cfdc000 | 1207 | return 0; |
c8076604 GH |
1208 | } |
1209 | ||
9ba075a6 AK |
1210 | static bool msr_mtrr_valid(unsigned msr) |
1211 | { | |
1212 | switch (msr) { | |
1213 | case 0x200 ... 0x200 + 2 * KVM_NR_VAR_MTRR - 1: | |
1214 | case MSR_MTRRfix64K_00000: | |
1215 | case MSR_MTRRfix16K_80000: | |
1216 | case MSR_MTRRfix16K_A0000: | |
1217 | case MSR_MTRRfix4K_C0000: | |
1218 | case MSR_MTRRfix4K_C8000: | |
1219 | case MSR_MTRRfix4K_D0000: | |
1220 | case MSR_MTRRfix4K_D8000: | |
1221 | case MSR_MTRRfix4K_E0000: | |
1222 | case MSR_MTRRfix4K_E8000: | |
1223 | case MSR_MTRRfix4K_F0000: | |
1224 | case MSR_MTRRfix4K_F8000: | |
1225 | case MSR_MTRRdefType: | |
1226 | case MSR_IA32_CR_PAT: | |
1227 | return true; | |
1228 | case 0x2f8: | |
1229 | return true; | |
1230 | } | |
1231 | return false; | |
1232 | } | |
1233 | ||
d6289b93 MT |
1234 | static bool valid_pat_type(unsigned t) |
1235 | { | |
1236 | return t < 8 && (1 << t) & 0xf3; /* 0, 1, 4, 5, 6, 7 */ | |
1237 | } | |
1238 | ||
1239 | static bool valid_mtrr_type(unsigned t) | |
1240 | { | |
1241 | return t < 8 && (1 << t) & 0x73; /* 0, 1, 4, 5, 6 */ | |
1242 | } | |
1243 | ||
1244 | static bool mtrr_valid(struct kvm_vcpu *vcpu, u32 msr, u64 data) | |
1245 | { | |
1246 | int i; | |
1247 | ||
1248 | if (!msr_mtrr_valid(msr)) | |
1249 | return false; | |
1250 | ||
1251 | if (msr == MSR_IA32_CR_PAT) { | |
1252 | for (i = 0; i < 8; i++) | |
1253 | if (!valid_pat_type((data >> (i * 8)) & 0xff)) | |
1254 | return false; | |
1255 | return true; | |
1256 | } else if (msr == MSR_MTRRdefType) { | |
1257 | if (data & ~0xcff) | |
1258 | return false; | |
1259 | return valid_mtrr_type(data & 0xff); | |
1260 | } else if (msr >= MSR_MTRRfix64K_00000 && msr <= MSR_MTRRfix4K_F8000) { | |
1261 | for (i = 0; i < 8 ; i++) | |
1262 | if (!valid_mtrr_type((data >> (i * 8)) & 0xff)) | |
1263 | return false; | |
1264 | return true; | |
1265 | } | |
1266 | ||
1267 | /* variable MTRRs */ | |
1268 | return valid_mtrr_type(data & 0xff); | |
1269 | } | |
1270 | ||
9ba075a6 AK |
1271 | static int set_msr_mtrr(struct kvm_vcpu *vcpu, u32 msr, u64 data) |
1272 | { | |
0bed3b56 SY |
1273 | u64 *p = (u64 *)&vcpu->arch.mtrr_state.fixed_ranges; |
1274 | ||
d6289b93 | 1275 | if (!mtrr_valid(vcpu, msr, data)) |
9ba075a6 AK |
1276 | return 1; |
1277 | ||
0bed3b56 SY |
1278 | if (msr == MSR_MTRRdefType) { |
1279 | vcpu->arch.mtrr_state.def_type = data; | |
1280 | vcpu->arch.mtrr_state.enabled = (data & 0xc00) >> 10; | |
1281 | } else if (msr == MSR_MTRRfix64K_00000) | |
1282 | p[0] = data; | |
1283 | else if (msr == MSR_MTRRfix16K_80000 || msr == MSR_MTRRfix16K_A0000) | |
1284 | p[1 + msr - MSR_MTRRfix16K_80000] = data; | |
1285 | else if (msr >= MSR_MTRRfix4K_C0000 && msr <= MSR_MTRRfix4K_F8000) | |
1286 | p[3 + msr - MSR_MTRRfix4K_C0000] = data; | |
1287 | else if (msr == MSR_IA32_CR_PAT) | |
1288 | vcpu->arch.pat = data; | |
1289 | else { /* Variable MTRRs */ | |
1290 | int idx, is_mtrr_mask; | |
1291 | u64 *pt; | |
1292 | ||
1293 | idx = (msr - 0x200) / 2; | |
1294 | is_mtrr_mask = msr - 0x200 - 2 * idx; | |
1295 | if (!is_mtrr_mask) | |
1296 | pt = | |
1297 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].base_lo; | |
1298 | else | |
1299 | pt = | |
1300 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].mask_lo; | |
1301 | *pt = data; | |
1302 | } | |
1303 | ||
1304 | kvm_mmu_reset_context(vcpu); | |
9ba075a6 AK |
1305 | return 0; |
1306 | } | |
15c4a640 | 1307 | |
890ca9ae | 1308 | static int set_msr_mce(struct kvm_vcpu *vcpu, u32 msr, u64 data) |
15c4a640 | 1309 | { |
890ca9ae HY |
1310 | u64 mcg_cap = vcpu->arch.mcg_cap; |
1311 | unsigned bank_num = mcg_cap & 0xff; | |
1312 | ||
15c4a640 | 1313 | switch (msr) { |
15c4a640 | 1314 | case MSR_IA32_MCG_STATUS: |
890ca9ae | 1315 | vcpu->arch.mcg_status = data; |
15c4a640 | 1316 | break; |
c7ac679c | 1317 | case MSR_IA32_MCG_CTL: |
890ca9ae HY |
1318 | if (!(mcg_cap & MCG_CTL_P)) |
1319 | return 1; | |
1320 | if (data != 0 && data != ~(u64)0) | |
1321 | return -1; | |
1322 | vcpu->arch.mcg_ctl = data; | |
1323 | break; | |
1324 | default: | |
1325 | if (msr >= MSR_IA32_MC0_CTL && | |
1326 | msr < MSR_IA32_MC0_CTL + 4 * bank_num) { | |
1327 | u32 offset = msr - MSR_IA32_MC0_CTL; | |
114be429 AP |
1328 | /* only 0 or all 1s can be written to IA32_MCi_CTL |
1329 | * some Linux kernels though clear bit 10 in bank 4 to | |
1330 | * workaround a BIOS/GART TBL issue on AMD K8s, ignore | |
1331 | * this to avoid an uncatched #GP in the guest | |
1332 | */ | |
890ca9ae | 1333 | if ((offset & 0x3) == 0 && |
114be429 | 1334 | data != 0 && (data | (1 << 10)) != ~(u64)0) |
890ca9ae HY |
1335 | return -1; |
1336 | vcpu->arch.mce_banks[offset] = data; | |
1337 | break; | |
1338 | } | |
1339 | return 1; | |
1340 | } | |
1341 | return 0; | |
1342 | } | |
1343 | ||
ffde22ac ES |
1344 | static int xen_hvm_config(struct kvm_vcpu *vcpu, u64 data) |
1345 | { | |
1346 | struct kvm *kvm = vcpu->kvm; | |
1347 | int lm = is_long_mode(vcpu); | |
1348 | u8 *blob_addr = lm ? (u8 *)(long)kvm->arch.xen_hvm_config.blob_addr_64 | |
1349 | : (u8 *)(long)kvm->arch.xen_hvm_config.blob_addr_32; | |
1350 | u8 blob_size = lm ? kvm->arch.xen_hvm_config.blob_size_64 | |
1351 | : kvm->arch.xen_hvm_config.blob_size_32; | |
1352 | u32 page_num = data & ~PAGE_MASK; | |
1353 | u64 page_addr = data & PAGE_MASK; | |
1354 | u8 *page; | |
1355 | int r; | |
1356 | ||
1357 | r = -E2BIG; | |
1358 | if (page_num >= blob_size) | |
1359 | goto out; | |
1360 | r = -ENOMEM; | |
1361 | page = kzalloc(PAGE_SIZE, GFP_KERNEL); | |
1362 | if (!page) | |
1363 | goto out; | |
1364 | r = -EFAULT; | |
1365 | if (copy_from_user(page, blob_addr + (page_num * PAGE_SIZE), PAGE_SIZE)) | |
1366 | goto out_free; | |
1367 | if (kvm_write_guest(kvm, page_addr, page, PAGE_SIZE)) | |
1368 | goto out_free; | |
1369 | r = 0; | |
1370 | out_free: | |
1371 | kfree(page); | |
1372 | out: | |
1373 | return r; | |
1374 | } | |
1375 | ||
55cd8e5a GN |
1376 | static bool kvm_hv_hypercall_enabled(struct kvm *kvm) |
1377 | { | |
1378 | return kvm->arch.hv_hypercall & HV_X64_MSR_HYPERCALL_ENABLE; | |
1379 | } | |
1380 | ||
1381 | static bool kvm_hv_msr_partition_wide(u32 msr) | |
1382 | { | |
1383 | bool r = false; | |
1384 | switch (msr) { | |
1385 | case HV_X64_MSR_GUEST_OS_ID: | |
1386 | case HV_X64_MSR_HYPERCALL: | |
1387 | r = true; | |
1388 | break; | |
1389 | } | |
1390 | ||
1391 | return r; | |
1392 | } | |
1393 | ||
1394 | static int set_msr_hyperv_pw(struct kvm_vcpu *vcpu, u32 msr, u64 data) | |
1395 | { | |
1396 | struct kvm *kvm = vcpu->kvm; | |
1397 | ||
1398 | switch (msr) { | |
1399 | case HV_X64_MSR_GUEST_OS_ID: | |
1400 | kvm->arch.hv_guest_os_id = data; | |
1401 | /* setting guest os id to zero disables hypercall page */ | |
1402 | if (!kvm->arch.hv_guest_os_id) | |
1403 | kvm->arch.hv_hypercall &= ~HV_X64_MSR_HYPERCALL_ENABLE; | |
1404 | break; | |
1405 | case HV_X64_MSR_HYPERCALL: { | |
1406 | u64 gfn; | |
1407 | unsigned long addr; | |
1408 | u8 instructions[4]; | |
1409 | ||
1410 | /* if guest os id is not set hypercall should remain disabled */ | |
1411 | if (!kvm->arch.hv_guest_os_id) | |
1412 | break; | |
1413 | if (!(data & HV_X64_MSR_HYPERCALL_ENABLE)) { | |
1414 | kvm->arch.hv_hypercall = data; | |
1415 | break; | |
1416 | } | |
1417 | gfn = data >> HV_X64_MSR_HYPERCALL_PAGE_ADDRESS_SHIFT; | |
1418 | addr = gfn_to_hva(kvm, gfn); | |
1419 | if (kvm_is_error_hva(addr)) | |
1420 | return 1; | |
1421 | kvm_x86_ops->patch_hypercall(vcpu, instructions); | |
1422 | ((unsigned char *)instructions)[3] = 0xc3; /* ret */ | |
8b0cedff | 1423 | if (__copy_to_user((void __user *)addr, instructions, 4)) |
55cd8e5a GN |
1424 | return 1; |
1425 | kvm->arch.hv_hypercall = data; | |
1426 | break; | |
1427 | } | |
1428 | default: | |
1429 | pr_unimpl(vcpu, "HYPER-V unimplemented wrmsr: 0x%x " | |
1430 | "data 0x%llx\n", msr, data); | |
1431 | return 1; | |
1432 | } | |
1433 | return 0; | |
1434 | } | |
1435 | ||
1436 | static int set_msr_hyperv(struct kvm_vcpu *vcpu, u32 msr, u64 data) | |
1437 | { | |
10388a07 GN |
1438 | switch (msr) { |
1439 | case HV_X64_MSR_APIC_ASSIST_PAGE: { | |
1440 | unsigned long addr; | |
55cd8e5a | 1441 | |
10388a07 GN |
1442 | if (!(data & HV_X64_MSR_APIC_ASSIST_PAGE_ENABLE)) { |
1443 | vcpu->arch.hv_vapic = data; | |
1444 | break; | |
1445 | } | |
1446 | addr = gfn_to_hva(vcpu->kvm, data >> | |
1447 | HV_X64_MSR_APIC_ASSIST_PAGE_ADDRESS_SHIFT); | |
1448 | if (kvm_is_error_hva(addr)) | |
1449 | return 1; | |
8b0cedff | 1450 | if (__clear_user((void __user *)addr, PAGE_SIZE)) |
10388a07 GN |
1451 | return 1; |
1452 | vcpu->arch.hv_vapic = data; | |
1453 | break; | |
1454 | } | |
1455 | case HV_X64_MSR_EOI: | |
1456 | return kvm_hv_vapic_msr_write(vcpu, APIC_EOI, data); | |
1457 | case HV_X64_MSR_ICR: | |
1458 | return kvm_hv_vapic_msr_write(vcpu, APIC_ICR, data); | |
1459 | case HV_X64_MSR_TPR: | |
1460 | return kvm_hv_vapic_msr_write(vcpu, APIC_TASKPRI, data); | |
1461 | default: | |
1462 | pr_unimpl(vcpu, "HYPER-V unimplemented wrmsr: 0x%x " | |
1463 | "data 0x%llx\n", msr, data); | |
1464 | return 1; | |
1465 | } | |
1466 | ||
1467 | return 0; | |
55cd8e5a GN |
1468 | } |
1469 | ||
344d9588 GN |
1470 | static int kvm_pv_enable_async_pf(struct kvm_vcpu *vcpu, u64 data) |
1471 | { | |
1472 | gpa_t gpa = data & ~0x3f; | |
1473 | ||
6adba527 GN |
1474 | /* Bits 2:5 are resrved, Should be zero */ |
1475 | if (data & 0x3c) | |
344d9588 GN |
1476 | return 1; |
1477 | ||
1478 | vcpu->arch.apf.msr_val = data; | |
1479 | ||
1480 | if (!(data & KVM_ASYNC_PF_ENABLED)) { | |
1481 | kvm_clear_async_pf_completion_queue(vcpu); | |
1482 | kvm_async_pf_hash_reset(vcpu); | |
1483 | return 0; | |
1484 | } | |
1485 | ||
1486 | if (kvm_gfn_to_hva_cache_init(vcpu->kvm, &vcpu->arch.apf.data, gpa)) | |
1487 | return 1; | |
1488 | ||
6adba527 | 1489 | vcpu->arch.apf.send_user_only = !(data & KVM_ASYNC_PF_SEND_ALWAYS); |
344d9588 GN |
1490 | kvm_async_pf_wakeup_all(vcpu); |
1491 | return 0; | |
1492 | } | |
1493 | ||
12f9a48f GC |
1494 | static void kvmclock_reset(struct kvm_vcpu *vcpu) |
1495 | { | |
1496 | if (vcpu->arch.time_page) { | |
1497 | kvm_release_page_dirty(vcpu->arch.time_page); | |
1498 | vcpu->arch.time_page = NULL; | |
1499 | } | |
1500 | } | |
1501 | ||
c9aaa895 GC |
1502 | static void accumulate_steal_time(struct kvm_vcpu *vcpu) |
1503 | { | |
1504 | u64 delta; | |
1505 | ||
1506 | if (!(vcpu->arch.st.msr_val & KVM_MSR_ENABLED)) | |
1507 | return; | |
1508 | ||
1509 | delta = current->sched_info.run_delay - vcpu->arch.st.last_steal; | |
1510 | vcpu->arch.st.last_steal = current->sched_info.run_delay; | |
1511 | vcpu->arch.st.accum_steal = delta; | |
1512 | } | |
1513 | ||
1514 | static void record_steal_time(struct kvm_vcpu *vcpu) | |
1515 | { | |
1516 | if (!(vcpu->arch.st.msr_val & KVM_MSR_ENABLED)) | |
1517 | return; | |
1518 | ||
1519 | if (unlikely(kvm_read_guest_cached(vcpu->kvm, &vcpu->arch.st.stime, | |
1520 | &vcpu->arch.st.steal, sizeof(struct kvm_steal_time)))) | |
1521 | return; | |
1522 | ||
1523 | vcpu->arch.st.steal.steal += vcpu->arch.st.accum_steal; | |
1524 | vcpu->arch.st.steal.version += 2; | |
1525 | vcpu->arch.st.accum_steal = 0; | |
1526 | ||
1527 | kvm_write_guest_cached(vcpu->kvm, &vcpu->arch.st.stime, | |
1528 | &vcpu->arch.st.steal, sizeof(struct kvm_steal_time)); | |
1529 | } | |
1530 | ||
15c4a640 CO |
1531 | int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data) |
1532 | { | |
1533 | switch (msr) { | |
15c4a640 | 1534 | case MSR_EFER: |
b69e8cae | 1535 | return set_efer(vcpu, data); |
8f1589d9 AP |
1536 | case MSR_K7_HWCR: |
1537 | data &= ~(u64)0x40; /* ignore flush filter disable */ | |
82494028 | 1538 | data &= ~(u64)0x100; /* ignore ignne emulation enable */ |
8f1589d9 AP |
1539 | if (data != 0) { |
1540 | pr_unimpl(vcpu, "unimplemented HWCR wrmsr: 0x%llx\n", | |
1541 | data); | |
1542 | return 1; | |
1543 | } | |
15c4a640 | 1544 | break; |
f7c6d140 AP |
1545 | case MSR_FAM10H_MMIO_CONF_BASE: |
1546 | if (data != 0) { | |
1547 | pr_unimpl(vcpu, "unimplemented MMIO_CONF_BASE wrmsr: " | |
1548 | "0x%llx\n", data); | |
1549 | return 1; | |
1550 | } | |
15c4a640 | 1551 | break; |
c323c0e5 | 1552 | case MSR_AMD64_NB_CFG: |
c7ac679c | 1553 | break; |
b5e2fec0 AG |
1554 | case MSR_IA32_DEBUGCTLMSR: |
1555 | if (!data) { | |
1556 | /* We support the non-activated case already */ | |
1557 | break; | |
1558 | } else if (data & ~(DEBUGCTLMSR_LBR | DEBUGCTLMSR_BTF)) { | |
1559 | /* Values other than LBR and BTF are vendor-specific, | |
1560 | thus reserved and should throw a #GP */ | |
1561 | return 1; | |
1562 | } | |
1563 | pr_unimpl(vcpu, "%s: MSR_IA32_DEBUGCTLMSR 0x%llx, nop\n", | |
1564 | __func__, data); | |
1565 | break; | |
15c4a640 CO |
1566 | case MSR_IA32_UCODE_REV: |
1567 | case MSR_IA32_UCODE_WRITE: | |
61a6bd67 | 1568 | case MSR_VM_HSAVE_PA: |
6098ca93 | 1569 | case MSR_AMD64_PATCH_LOADER: |
15c4a640 | 1570 | break; |
9ba075a6 AK |
1571 | case 0x200 ... 0x2ff: |
1572 | return set_msr_mtrr(vcpu, msr, data); | |
15c4a640 CO |
1573 | case MSR_IA32_APICBASE: |
1574 | kvm_set_apic_base(vcpu, data); | |
1575 | break; | |
0105d1a5 GN |
1576 | case APIC_BASE_MSR ... APIC_BASE_MSR + 0x3ff: |
1577 | return kvm_x2apic_msr_write(vcpu, msr, data); | |
a3e06bbe LJ |
1578 | case MSR_IA32_TSCDEADLINE: |
1579 | kvm_set_lapic_tscdeadline_msr(vcpu, data); | |
1580 | break; | |
15c4a640 | 1581 | case MSR_IA32_MISC_ENABLE: |
ad312c7c | 1582 | vcpu->arch.ia32_misc_enable_msr = data; |
15c4a640 | 1583 | break; |
11c6bffa | 1584 | case MSR_KVM_WALL_CLOCK_NEW: |
18068523 GOC |
1585 | case MSR_KVM_WALL_CLOCK: |
1586 | vcpu->kvm->arch.wall_clock = data; | |
1587 | kvm_write_wall_clock(vcpu->kvm, data); | |
1588 | break; | |
11c6bffa | 1589 | case MSR_KVM_SYSTEM_TIME_NEW: |
18068523 | 1590 | case MSR_KVM_SYSTEM_TIME: { |
12f9a48f | 1591 | kvmclock_reset(vcpu); |
18068523 GOC |
1592 | |
1593 | vcpu->arch.time = data; | |
c285545f | 1594 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
18068523 GOC |
1595 | |
1596 | /* we verify if the enable bit is set... */ | |
1597 | if (!(data & 1)) | |
1598 | break; | |
1599 | ||
1600 | /* ...but clean it before doing the actual write */ | |
1601 | vcpu->arch.time_offset = data & ~(PAGE_MASK | 1); | |
1602 | ||
18068523 GOC |
1603 | vcpu->arch.time_page = |
1604 | gfn_to_page(vcpu->kvm, data >> PAGE_SHIFT); | |
18068523 GOC |
1605 | |
1606 | if (is_error_page(vcpu->arch.time_page)) { | |
1607 | kvm_release_page_clean(vcpu->arch.time_page); | |
1608 | vcpu->arch.time_page = NULL; | |
1609 | } | |
18068523 GOC |
1610 | break; |
1611 | } | |
344d9588 GN |
1612 | case MSR_KVM_ASYNC_PF_EN: |
1613 | if (kvm_pv_enable_async_pf(vcpu, data)) | |
1614 | return 1; | |
1615 | break; | |
c9aaa895 GC |
1616 | case MSR_KVM_STEAL_TIME: |
1617 | ||
1618 | if (unlikely(!sched_info_on())) | |
1619 | return 1; | |
1620 | ||
1621 | if (data & KVM_STEAL_RESERVED_MASK) | |
1622 | return 1; | |
1623 | ||
1624 | if (kvm_gfn_to_hva_cache_init(vcpu->kvm, &vcpu->arch.st.stime, | |
1625 | data & KVM_STEAL_VALID_BITS)) | |
1626 | return 1; | |
1627 | ||
1628 | vcpu->arch.st.msr_val = data; | |
1629 | ||
1630 | if (!(data & KVM_MSR_ENABLED)) | |
1631 | break; | |
1632 | ||
1633 | vcpu->arch.st.last_steal = current->sched_info.run_delay; | |
1634 | ||
1635 | preempt_disable(); | |
1636 | accumulate_steal_time(vcpu); | |
1637 | preempt_enable(); | |
1638 | ||
1639 | kvm_make_request(KVM_REQ_STEAL_UPDATE, vcpu); | |
1640 | ||
1641 | break; | |
1642 | ||
890ca9ae HY |
1643 | case MSR_IA32_MCG_CTL: |
1644 | case MSR_IA32_MCG_STATUS: | |
1645 | case MSR_IA32_MC0_CTL ... MSR_IA32_MC0_CTL + 4 * KVM_MAX_MCE_BANKS - 1: | |
1646 | return set_msr_mce(vcpu, msr, data); | |
71db6023 AP |
1647 | |
1648 | /* Performance counters are not protected by a CPUID bit, | |
1649 | * so we should check all of them in the generic path for the sake of | |
1650 | * cross vendor migration. | |
1651 | * Writing a zero into the event select MSRs disables them, | |
1652 | * which we perfectly emulate ;-). Any other value should be at least | |
1653 | * reported, some guests depend on them. | |
1654 | */ | |
1655 | case MSR_P6_EVNTSEL0: | |
1656 | case MSR_P6_EVNTSEL1: | |
1657 | case MSR_K7_EVNTSEL0: | |
1658 | case MSR_K7_EVNTSEL1: | |
1659 | case MSR_K7_EVNTSEL2: | |
1660 | case MSR_K7_EVNTSEL3: | |
1661 | if (data != 0) | |
1662 | pr_unimpl(vcpu, "unimplemented perfctr wrmsr: " | |
1663 | "0x%x data 0x%llx\n", msr, data); | |
1664 | break; | |
1665 | /* at least RHEL 4 unconditionally writes to the perfctr registers, | |
1666 | * so we ignore writes to make it happy. | |
1667 | */ | |
1668 | case MSR_P6_PERFCTR0: | |
1669 | case MSR_P6_PERFCTR1: | |
1670 | case MSR_K7_PERFCTR0: | |
1671 | case MSR_K7_PERFCTR1: | |
1672 | case MSR_K7_PERFCTR2: | |
1673 | case MSR_K7_PERFCTR3: | |
1674 | pr_unimpl(vcpu, "unimplemented perfctr wrmsr: " | |
1675 | "0x%x data 0x%llx\n", msr, data); | |
1676 | break; | |
84e0cefa JS |
1677 | case MSR_K7_CLK_CTL: |
1678 | /* | |
1679 | * Ignore all writes to this no longer documented MSR. | |
1680 | * Writes are only relevant for old K7 processors, | |
1681 | * all pre-dating SVM, but a recommended workaround from | |
1682 | * AMD for these chips. It is possible to speicify the | |
1683 | * affected processor models on the command line, hence | |
1684 | * the need to ignore the workaround. | |
1685 | */ | |
1686 | break; | |
55cd8e5a GN |
1687 | case HV_X64_MSR_GUEST_OS_ID ... HV_X64_MSR_SINT15: |
1688 | if (kvm_hv_msr_partition_wide(msr)) { | |
1689 | int r; | |
1690 | mutex_lock(&vcpu->kvm->lock); | |
1691 | r = set_msr_hyperv_pw(vcpu, msr, data); | |
1692 | mutex_unlock(&vcpu->kvm->lock); | |
1693 | return r; | |
1694 | } else | |
1695 | return set_msr_hyperv(vcpu, msr, data); | |
1696 | break; | |
91c9c3ed | 1697 | case MSR_IA32_BBL_CR_CTL3: |
1698 | /* Drop writes to this legacy MSR -- see rdmsr | |
1699 | * counterpart for further detail. | |
1700 | */ | |
1701 | pr_unimpl(vcpu, "ignored wrmsr: 0x%x data %llx\n", msr, data); | |
1702 | break; | |
15c4a640 | 1703 | default: |
ffde22ac ES |
1704 | if (msr && (msr == vcpu->kvm->arch.xen_hvm_config.msr)) |
1705 | return xen_hvm_config(vcpu, data); | |
ed85c068 AP |
1706 | if (!ignore_msrs) { |
1707 | pr_unimpl(vcpu, "unhandled wrmsr: 0x%x data %llx\n", | |
1708 | msr, data); | |
1709 | return 1; | |
1710 | } else { | |
1711 | pr_unimpl(vcpu, "ignored wrmsr: 0x%x data %llx\n", | |
1712 | msr, data); | |
1713 | break; | |
1714 | } | |
15c4a640 CO |
1715 | } |
1716 | return 0; | |
1717 | } | |
1718 | EXPORT_SYMBOL_GPL(kvm_set_msr_common); | |
1719 | ||
1720 | ||
1721 | /* | |
1722 | * Reads an msr value (of 'msr_index') into 'pdata'. | |
1723 | * Returns 0 on success, non-0 otherwise. | |
1724 | * Assumes vcpu_load() was already called. | |
1725 | */ | |
1726 | int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata) | |
1727 | { | |
1728 | return kvm_x86_ops->get_msr(vcpu, msr_index, pdata); | |
1729 | } | |
1730 | ||
9ba075a6 AK |
1731 | static int get_msr_mtrr(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
1732 | { | |
0bed3b56 SY |
1733 | u64 *p = (u64 *)&vcpu->arch.mtrr_state.fixed_ranges; |
1734 | ||
9ba075a6 AK |
1735 | if (!msr_mtrr_valid(msr)) |
1736 | return 1; | |
1737 | ||
0bed3b56 SY |
1738 | if (msr == MSR_MTRRdefType) |
1739 | *pdata = vcpu->arch.mtrr_state.def_type + | |
1740 | (vcpu->arch.mtrr_state.enabled << 10); | |
1741 | else if (msr == MSR_MTRRfix64K_00000) | |
1742 | *pdata = p[0]; | |
1743 | else if (msr == MSR_MTRRfix16K_80000 || msr == MSR_MTRRfix16K_A0000) | |
1744 | *pdata = p[1 + msr - MSR_MTRRfix16K_80000]; | |
1745 | else if (msr >= MSR_MTRRfix4K_C0000 && msr <= MSR_MTRRfix4K_F8000) | |
1746 | *pdata = p[3 + msr - MSR_MTRRfix4K_C0000]; | |
1747 | else if (msr == MSR_IA32_CR_PAT) | |
1748 | *pdata = vcpu->arch.pat; | |
1749 | else { /* Variable MTRRs */ | |
1750 | int idx, is_mtrr_mask; | |
1751 | u64 *pt; | |
1752 | ||
1753 | idx = (msr - 0x200) / 2; | |
1754 | is_mtrr_mask = msr - 0x200 - 2 * idx; | |
1755 | if (!is_mtrr_mask) | |
1756 | pt = | |
1757 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].base_lo; | |
1758 | else | |
1759 | pt = | |
1760 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].mask_lo; | |
1761 | *pdata = *pt; | |
1762 | } | |
1763 | ||
9ba075a6 AK |
1764 | return 0; |
1765 | } | |
1766 | ||
890ca9ae | 1767 | static int get_msr_mce(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
15c4a640 CO |
1768 | { |
1769 | u64 data; | |
890ca9ae HY |
1770 | u64 mcg_cap = vcpu->arch.mcg_cap; |
1771 | unsigned bank_num = mcg_cap & 0xff; | |
15c4a640 CO |
1772 | |
1773 | switch (msr) { | |
15c4a640 CO |
1774 | case MSR_IA32_P5_MC_ADDR: |
1775 | case MSR_IA32_P5_MC_TYPE: | |
890ca9ae HY |
1776 | data = 0; |
1777 | break; | |
15c4a640 | 1778 | case MSR_IA32_MCG_CAP: |
890ca9ae HY |
1779 | data = vcpu->arch.mcg_cap; |
1780 | break; | |
c7ac679c | 1781 | case MSR_IA32_MCG_CTL: |
890ca9ae HY |
1782 | if (!(mcg_cap & MCG_CTL_P)) |
1783 | return 1; | |
1784 | data = vcpu->arch.mcg_ctl; | |
1785 | break; | |
1786 | case MSR_IA32_MCG_STATUS: | |
1787 | data = vcpu->arch.mcg_status; | |
1788 | break; | |
1789 | default: | |
1790 | if (msr >= MSR_IA32_MC0_CTL && | |
1791 | msr < MSR_IA32_MC0_CTL + 4 * bank_num) { | |
1792 | u32 offset = msr - MSR_IA32_MC0_CTL; | |
1793 | data = vcpu->arch.mce_banks[offset]; | |
1794 | break; | |
1795 | } | |
1796 | return 1; | |
1797 | } | |
1798 | *pdata = data; | |
1799 | return 0; | |
1800 | } | |
1801 | ||
55cd8e5a GN |
1802 | static int get_msr_hyperv_pw(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
1803 | { | |
1804 | u64 data = 0; | |
1805 | struct kvm *kvm = vcpu->kvm; | |
1806 | ||
1807 | switch (msr) { | |
1808 | case HV_X64_MSR_GUEST_OS_ID: | |
1809 | data = kvm->arch.hv_guest_os_id; | |
1810 | break; | |
1811 | case HV_X64_MSR_HYPERCALL: | |
1812 | data = kvm->arch.hv_hypercall; | |
1813 | break; | |
1814 | default: | |
1815 | pr_unimpl(vcpu, "Hyper-V unhandled rdmsr: 0x%x\n", msr); | |
1816 | return 1; | |
1817 | } | |
1818 | ||
1819 | *pdata = data; | |
1820 | return 0; | |
1821 | } | |
1822 | ||
1823 | static int get_msr_hyperv(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) | |
1824 | { | |
1825 | u64 data = 0; | |
1826 | ||
1827 | switch (msr) { | |
1828 | case HV_X64_MSR_VP_INDEX: { | |
1829 | int r; | |
1830 | struct kvm_vcpu *v; | |
1831 | kvm_for_each_vcpu(r, v, vcpu->kvm) | |
1832 | if (v == vcpu) | |
1833 | data = r; | |
1834 | break; | |
1835 | } | |
10388a07 GN |
1836 | case HV_X64_MSR_EOI: |
1837 | return kvm_hv_vapic_msr_read(vcpu, APIC_EOI, pdata); | |
1838 | case HV_X64_MSR_ICR: | |
1839 | return kvm_hv_vapic_msr_read(vcpu, APIC_ICR, pdata); | |
1840 | case HV_X64_MSR_TPR: | |
1841 | return kvm_hv_vapic_msr_read(vcpu, APIC_TASKPRI, pdata); | |
14fa67ee | 1842 | case HV_X64_MSR_APIC_ASSIST_PAGE: |
d1613ad5 MW |
1843 | data = vcpu->arch.hv_vapic; |
1844 | break; | |
55cd8e5a GN |
1845 | default: |
1846 | pr_unimpl(vcpu, "Hyper-V unhandled rdmsr: 0x%x\n", msr); | |
1847 | return 1; | |
1848 | } | |
1849 | *pdata = data; | |
1850 | return 0; | |
1851 | } | |
1852 | ||
890ca9ae HY |
1853 | int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
1854 | { | |
1855 | u64 data; | |
1856 | ||
1857 | switch (msr) { | |
890ca9ae | 1858 | case MSR_IA32_PLATFORM_ID: |
15c4a640 | 1859 | case MSR_IA32_EBL_CR_POWERON: |
b5e2fec0 AG |
1860 | case MSR_IA32_DEBUGCTLMSR: |
1861 | case MSR_IA32_LASTBRANCHFROMIP: | |
1862 | case MSR_IA32_LASTBRANCHTOIP: | |
1863 | case MSR_IA32_LASTINTFROMIP: | |
1864 | case MSR_IA32_LASTINTTOIP: | |
60af2ecd JSR |
1865 | case MSR_K8_SYSCFG: |
1866 | case MSR_K7_HWCR: | |
61a6bd67 | 1867 | case MSR_VM_HSAVE_PA: |
1f3ee616 AS |
1868 | case MSR_P6_PERFCTR0: |
1869 | case MSR_P6_PERFCTR1: | |
7fe29e0f AS |
1870 | case MSR_P6_EVNTSEL0: |
1871 | case MSR_P6_EVNTSEL1: | |
9e699624 | 1872 | case MSR_K7_EVNTSEL0: |
1f3ee616 | 1873 | case MSR_K7_PERFCTR0: |
1fdbd48c | 1874 | case MSR_K8_INT_PENDING_MSG: |
c323c0e5 | 1875 | case MSR_AMD64_NB_CFG: |
f7c6d140 | 1876 | case MSR_FAM10H_MMIO_CONF_BASE: |
15c4a640 CO |
1877 | data = 0; |
1878 | break; | |
742bc670 MT |
1879 | case MSR_IA32_UCODE_REV: |
1880 | data = 0x100000000ULL; | |
1881 | break; | |
9ba075a6 AK |
1882 | case MSR_MTRRcap: |
1883 | data = 0x500 | KVM_NR_VAR_MTRR; | |
1884 | break; | |
1885 | case 0x200 ... 0x2ff: | |
1886 | return get_msr_mtrr(vcpu, msr, pdata); | |
15c4a640 CO |
1887 | case 0xcd: /* fsb frequency */ |
1888 | data = 3; | |
1889 | break; | |
7b914098 JS |
1890 | /* |
1891 | * MSR_EBC_FREQUENCY_ID | |
1892 | * Conservative value valid for even the basic CPU models. | |
1893 | * Models 0,1: 000 in bits 23:21 indicating a bus speed of | |
1894 | * 100MHz, model 2 000 in bits 18:16 indicating 100MHz, | |
1895 | * and 266MHz for model 3, or 4. Set Core Clock | |
1896 | * Frequency to System Bus Frequency Ratio to 1 (bits | |
1897 | * 31:24) even though these are only valid for CPU | |
1898 | * models > 2, however guests may end up dividing or | |
1899 | * multiplying by zero otherwise. | |
1900 | */ | |
1901 | case MSR_EBC_FREQUENCY_ID: | |
1902 | data = 1 << 24; | |
1903 | break; | |
15c4a640 CO |
1904 | case MSR_IA32_APICBASE: |
1905 | data = kvm_get_apic_base(vcpu); | |
1906 | break; | |
0105d1a5 GN |
1907 | case APIC_BASE_MSR ... APIC_BASE_MSR + 0x3ff: |
1908 | return kvm_x2apic_msr_read(vcpu, msr, pdata); | |
1909 | break; | |
a3e06bbe LJ |
1910 | case MSR_IA32_TSCDEADLINE: |
1911 | data = kvm_get_lapic_tscdeadline_msr(vcpu); | |
1912 | break; | |
15c4a640 | 1913 | case MSR_IA32_MISC_ENABLE: |
ad312c7c | 1914 | data = vcpu->arch.ia32_misc_enable_msr; |
15c4a640 | 1915 | break; |
847f0ad8 AG |
1916 | case MSR_IA32_PERF_STATUS: |
1917 | /* TSC increment by tick */ | |
1918 | data = 1000ULL; | |
1919 | /* CPU multiplier */ | |
1920 | data |= (((uint64_t)4ULL) << 40); | |
1921 | break; | |
15c4a640 | 1922 | case MSR_EFER: |
f6801dff | 1923 | data = vcpu->arch.efer; |
15c4a640 | 1924 | break; |
18068523 | 1925 | case MSR_KVM_WALL_CLOCK: |
11c6bffa | 1926 | case MSR_KVM_WALL_CLOCK_NEW: |
18068523 GOC |
1927 | data = vcpu->kvm->arch.wall_clock; |
1928 | break; | |
1929 | case MSR_KVM_SYSTEM_TIME: | |
11c6bffa | 1930 | case MSR_KVM_SYSTEM_TIME_NEW: |
18068523 GOC |
1931 | data = vcpu->arch.time; |
1932 | break; | |
344d9588 GN |
1933 | case MSR_KVM_ASYNC_PF_EN: |
1934 | data = vcpu->arch.apf.msr_val; | |
1935 | break; | |
c9aaa895 GC |
1936 | case MSR_KVM_STEAL_TIME: |
1937 | data = vcpu->arch.st.msr_val; | |
1938 | break; | |
890ca9ae HY |
1939 | case MSR_IA32_P5_MC_ADDR: |
1940 | case MSR_IA32_P5_MC_TYPE: | |
1941 | case MSR_IA32_MCG_CAP: | |
1942 | case MSR_IA32_MCG_CTL: | |
1943 | case MSR_IA32_MCG_STATUS: | |
1944 | case MSR_IA32_MC0_CTL ... MSR_IA32_MC0_CTL + 4 * KVM_MAX_MCE_BANKS - 1: | |
1945 | return get_msr_mce(vcpu, msr, pdata); | |
84e0cefa JS |
1946 | case MSR_K7_CLK_CTL: |
1947 | /* | |
1948 | * Provide expected ramp-up count for K7. All other | |
1949 | * are set to zero, indicating minimum divisors for | |
1950 | * every field. | |
1951 | * | |
1952 | * This prevents guest kernels on AMD host with CPU | |
1953 | * type 6, model 8 and higher from exploding due to | |
1954 | * the rdmsr failing. | |
1955 | */ | |
1956 | data = 0x20000000; | |
1957 | break; | |
55cd8e5a GN |
1958 | case HV_X64_MSR_GUEST_OS_ID ... HV_X64_MSR_SINT15: |
1959 | if (kvm_hv_msr_partition_wide(msr)) { | |
1960 | int r; | |
1961 | mutex_lock(&vcpu->kvm->lock); | |
1962 | r = get_msr_hyperv_pw(vcpu, msr, pdata); | |
1963 | mutex_unlock(&vcpu->kvm->lock); | |
1964 | return r; | |
1965 | } else | |
1966 | return get_msr_hyperv(vcpu, msr, pdata); | |
1967 | break; | |
91c9c3ed | 1968 | case MSR_IA32_BBL_CR_CTL3: |
1969 | /* This legacy MSR exists but isn't fully documented in current | |
1970 | * silicon. It is however accessed by winxp in very narrow | |
1971 | * scenarios where it sets bit #19, itself documented as | |
1972 | * a "reserved" bit. Best effort attempt to source coherent | |
1973 | * read data here should the balance of the register be | |
1974 | * interpreted by the guest: | |
1975 | * | |
1976 | * L2 cache control register 3: 64GB range, 256KB size, | |
1977 | * enabled, latency 0x1, configured | |
1978 | */ | |
1979 | data = 0xbe702111; | |
1980 | break; | |
15c4a640 | 1981 | default: |
ed85c068 AP |
1982 | if (!ignore_msrs) { |
1983 | pr_unimpl(vcpu, "unhandled rdmsr: 0x%x\n", msr); | |
1984 | return 1; | |
1985 | } else { | |
1986 | pr_unimpl(vcpu, "ignored rdmsr: 0x%x\n", msr); | |
1987 | data = 0; | |
1988 | } | |
1989 | break; | |
15c4a640 CO |
1990 | } |
1991 | *pdata = data; | |
1992 | return 0; | |
1993 | } | |
1994 | EXPORT_SYMBOL_GPL(kvm_get_msr_common); | |
1995 | ||
313a3dc7 CO |
1996 | /* |
1997 | * Read or write a bunch of msrs. All parameters are kernel addresses. | |
1998 | * | |
1999 | * @return number of msrs set successfully. | |
2000 | */ | |
2001 | static int __msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs *msrs, | |
2002 | struct kvm_msr_entry *entries, | |
2003 | int (*do_msr)(struct kvm_vcpu *vcpu, | |
2004 | unsigned index, u64 *data)) | |
2005 | { | |
f656ce01 | 2006 | int i, idx; |
313a3dc7 | 2007 | |
f656ce01 | 2008 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
313a3dc7 CO |
2009 | for (i = 0; i < msrs->nmsrs; ++i) |
2010 | if (do_msr(vcpu, entries[i].index, &entries[i].data)) | |
2011 | break; | |
f656ce01 | 2012 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
313a3dc7 | 2013 | |
313a3dc7 CO |
2014 | return i; |
2015 | } | |
2016 | ||
2017 | /* | |
2018 | * Read or write a bunch of msrs. Parameters are user addresses. | |
2019 | * | |
2020 | * @return number of msrs set successfully. | |
2021 | */ | |
2022 | static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs, | |
2023 | int (*do_msr)(struct kvm_vcpu *vcpu, | |
2024 | unsigned index, u64 *data), | |
2025 | int writeback) | |
2026 | { | |
2027 | struct kvm_msrs msrs; | |
2028 | struct kvm_msr_entry *entries; | |
2029 | int r, n; | |
2030 | unsigned size; | |
2031 | ||
2032 | r = -EFAULT; | |
2033 | if (copy_from_user(&msrs, user_msrs, sizeof msrs)) | |
2034 | goto out; | |
2035 | ||
2036 | r = -E2BIG; | |
2037 | if (msrs.nmsrs >= MAX_IO_MSRS) | |
2038 | goto out; | |
2039 | ||
2040 | r = -ENOMEM; | |
2041 | size = sizeof(struct kvm_msr_entry) * msrs.nmsrs; | |
7a73c028 | 2042 | entries = kmalloc(size, GFP_KERNEL); |
313a3dc7 CO |
2043 | if (!entries) |
2044 | goto out; | |
2045 | ||
2046 | r = -EFAULT; | |
2047 | if (copy_from_user(entries, user_msrs->entries, size)) | |
2048 | goto out_free; | |
2049 | ||
2050 | r = n = __msr_io(vcpu, &msrs, entries, do_msr); | |
2051 | if (r < 0) | |
2052 | goto out_free; | |
2053 | ||
2054 | r = -EFAULT; | |
2055 | if (writeback && copy_to_user(user_msrs->entries, entries, size)) | |
2056 | goto out_free; | |
2057 | ||
2058 | r = n; | |
2059 | ||
2060 | out_free: | |
7a73c028 | 2061 | kfree(entries); |
313a3dc7 CO |
2062 | out: |
2063 | return r; | |
2064 | } | |
2065 | ||
018d00d2 ZX |
2066 | int kvm_dev_ioctl_check_extension(long ext) |
2067 | { | |
2068 | int r; | |
2069 | ||
2070 | switch (ext) { | |
2071 | case KVM_CAP_IRQCHIP: | |
2072 | case KVM_CAP_HLT: | |
2073 | case KVM_CAP_MMU_SHADOW_CACHE_CONTROL: | |
018d00d2 | 2074 | case KVM_CAP_SET_TSS_ADDR: |
07716717 | 2075 | case KVM_CAP_EXT_CPUID: |
c8076604 | 2076 | case KVM_CAP_CLOCKSOURCE: |
7837699f | 2077 | case KVM_CAP_PIT: |
a28e4f5a | 2078 | case KVM_CAP_NOP_IO_DELAY: |
62d9f0db | 2079 | case KVM_CAP_MP_STATE: |
ed848624 | 2080 | case KVM_CAP_SYNC_MMU: |
a355c85c | 2081 | case KVM_CAP_USER_NMI: |
52d939a0 | 2082 | case KVM_CAP_REINJECT_CONTROL: |
4925663a | 2083 | case KVM_CAP_IRQ_INJECT_STATUS: |
e56d532f | 2084 | case KVM_CAP_ASSIGN_DEV_IRQ: |
721eecbf | 2085 | case KVM_CAP_IRQFD: |
d34e6b17 | 2086 | case KVM_CAP_IOEVENTFD: |
c5ff41ce | 2087 | case KVM_CAP_PIT2: |
e9f42757 | 2088 | case KVM_CAP_PIT_STATE2: |
b927a3ce | 2089 | case KVM_CAP_SET_IDENTITY_MAP_ADDR: |
ffde22ac | 2090 | case KVM_CAP_XEN_HVM: |
afbcf7ab | 2091 | case KVM_CAP_ADJUST_CLOCK: |
3cfc3092 | 2092 | case KVM_CAP_VCPU_EVENTS: |
55cd8e5a | 2093 | case KVM_CAP_HYPERV: |
10388a07 | 2094 | case KVM_CAP_HYPERV_VAPIC: |
c25bc163 | 2095 | case KVM_CAP_HYPERV_SPIN: |
ab9f4ecb | 2096 | case KVM_CAP_PCI_SEGMENT: |
a1efbe77 | 2097 | case KVM_CAP_DEBUGREGS: |
d2be1651 | 2098 | case KVM_CAP_X86_ROBUST_SINGLESTEP: |
2d5b5a66 | 2099 | case KVM_CAP_XSAVE: |
344d9588 | 2100 | case KVM_CAP_ASYNC_PF: |
92a1f12d | 2101 | case KVM_CAP_GET_TSC_KHZ: |
018d00d2 ZX |
2102 | r = 1; |
2103 | break; | |
542472b5 LV |
2104 | case KVM_CAP_COALESCED_MMIO: |
2105 | r = KVM_COALESCED_MMIO_PAGE_OFFSET; | |
2106 | break; | |
774ead3a AK |
2107 | case KVM_CAP_VAPIC: |
2108 | r = !kvm_x86_ops->cpu_has_accelerated_tpr(); | |
2109 | break; | |
f725230a | 2110 | case KVM_CAP_NR_VCPUS: |
8c3ba334 SL |
2111 | r = KVM_SOFT_MAX_VCPUS; |
2112 | break; | |
2113 | case KVM_CAP_MAX_VCPUS: | |
f725230a AK |
2114 | r = KVM_MAX_VCPUS; |
2115 | break; | |
a988b910 AK |
2116 | case KVM_CAP_NR_MEMSLOTS: |
2117 | r = KVM_MEMORY_SLOTS; | |
2118 | break; | |
a68a6a72 MT |
2119 | case KVM_CAP_PV_MMU: /* obsolete */ |
2120 | r = 0; | |
2f333bcb | 2121 | break; |
62c476c7 | 2122 | case KVM_CAP_IOMMU: |
a1b60c1c | 2123 | r = iommu_present(&pci_bus_type); |
62c476c7 | 2124 | break; |
890ca9ae HY |
2125 | case KVM_CAP_MCE: |
2126 | r = KVM_MAX_MCE_BANKS; | |
2127 | break; | |
2d5b5a66 SY |
2128 | case KVM_CAP_XCRS: |
2129 | r = cpu_has_xsave; | |
2130 | break; | |
92a1f12d JR |
2131 | case KVM_CAP_TSC_CONTROL: |
2132 | r = kvm_has_tsc_control; | |
2133 | break; | |
4d25a066 JK |
2134 | case KVM_CAP_TSC_DEADLINE_TIMER: |
2135 | r = boot_cpu_has(X86_FEATURE_TSC_DEADLINE_TIMER); | |
2136 | break; | |
018d00d2 ZX |
2137 | default: |
2138 | r = 0; | |
2139 | break; | |
2140 | } | |
2141 | return r; | |
2142 | ||
2143 | } | |
2144 | ||
043405e1 CO |
2145 | long kvm_arch_dev_ioctl(struct file *filp, |
2146 | unsigned int ioctl, unsigned long arg) | |
2147 | { | |
2148 | void __user *argp = (void __user *)arg; | |
2149 | long r; | |
2150 | ||
2151 | switch (ioctl) { | |
2152 | case KVM_GET_MSR_INDEX_LIST: { | |
2153 | struct kvm_msr_list __user *user_msr_list = argp; | |
2154 | struct kvm_msr_list msr_list; | |
2155 | unsigned n; | |
2156 | ||
2157 | r = -EFAULT; | |
2158 | if (copy_from_user(&msr_list, user_msr_list, sizeof msr_list)) | |
2159 | goto out; | |
2160 | n = msr_list.nmsrs; | |
2161 | msr_list.nmsrs = num_msrs_to_save + ARRAY_SIZE(emulated_msrs); | |
2162 | if (copy_to_user(user_msr_list, &msr_list, sizeof msr_list)) | |
2163 | goto out; | |
2164 | r = -E2BIG; | |
e125e7b6 | 2165 | if (n < msr_list.nmsrs) |
043405e1 CO |
2166 | goto out; |
2167 | r = -EFAULT; | |
2168 | if (copy_to_user(user_msr_list->indices, &msrs_to_save, | |
2169 | num_msrs_to_save * sizeof(u32))) | |
2170 | goto out; | |
e125e7b6 | 2171 | if (copy_to_user(user_msr_list->indices + num_msrs_to_save, |
043405e1 CO |
2172 | &emulated_msrs, |
2173 | ARRAY_SIZE(emulated_msrs) * sizeof(u32))) | |
2174 | goto out; | |
2175 | r = 0; | |
2176 | break; | |
2177 | } | |
674eea0f AK |
2178 | case KVM_GET_SUPPORTED_CPUID: { |
2179 | struct kvm_cpuid2 __user *cpuid_arg = argp; | |
2180 | struct kvm_cpuid2 cpuid; | |
2181 | ||
2182 | r = -EFAULT; | |
2183 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
2184 | goto out; | |
2185 | r = kvm_dev_ioctl_get_supported_cpuid(&cpuid, | |
19355475 | 2186 | cpuid_arg->entries); |
674eea0f AK |
2187 | if (r) |
2188 | goto out; | |
2189 | ||
2190 | r = -EFAULT; | |
2191 | if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid)) | |
2192 | goto out; | |
2193 | r = 0; | |
2194 | break; | |
2195 | } | |
890ca9ae HY |
2196 | case KVM_X86_GET_MCE_CAP_SUPPORTED: { |
2197 | u64 mce_cap; | |
2198 | ||
2199 | mce_cap = KVM_MCE_CAP_SUPPORTED; | |
2200 | r = -EFAULT; | |
2201 | if (copy_to_user(argp, &mce_cap, sizeof mce_cap)) | |
2202 | goto out; | |
2203 | r = 0; | |
2204 | break; | |
2205 | } | |
043405e1 CO |
2206 | default: |
2207 | r = -EINVAL; | |
2208 | } | |
2209 | out: | |
2210 | return r; | |
2211 | } | |
2212 | ||
f5f48ee1 SY |
2213 | static void wbinvd_ipi(void *garbage) |
2214 | { | |
2215 | wbinvd(); | |
2216 | } | |
2217 | ||
2218 | static bool need_emulate_wbinvd(struct kvm_vcpu *vcpu) | |
2219 | { | |
2220 | return vcpu->kvm->arch.iommu_domain && | |
2221 | !(vcpu->kvm->arch.iommu_flags & KVM_IOMMU_CACHE_COHERENCY); | |
2222 | } | |
2223 | ||
313a3dc7 CO |
2224 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
2225 | { | |
f5f48ee1 SY |
2226 | /* Address WBINVD may be executed by guest */ |
2227 | if (need_emulate_wbinvd(vcpu)) { | |
2228 | if (kvm_x86_ops->has_wbinvd_exit()) | |
2229 | cpumask_set_cpu(cpu, vcpu->arch.wbinvd_dirty_mask); | |
2230 | else if (vcpu->cpu != -1 && vcpu->cpu != cpu) | |
2231 | smp_call_function_single(vcpu->cpu, | |
2232 | wbinvd_ipi, NULL, 1); | |
2233 | } | |
2234 | ||
313a3dc7 | 2235 | kvm_x86_ops->vcpu_load(vcpu, cpu); |
48434c20 | 2236 | if (unlikely(vcpu->cpu != cpu) || check_tsc_unstable()) { |
e48672fa | 2237 | /* Make sure TSC doesn't go backwards */ |
8f6055cb JR |
2238 | s64 tsc_delta; |
2239 | u64 tsc; | |
2240 | ||
d5c1785d | 2241 | tsc = kvm_x86_ops->read_l1_tsc(vcpu); |
8f6055cb JR |
2242 | tsc_delta = !vcpu->arch.last_guest_tsc ? 0 : |
2243 | tsc - vcpu->arch.last_guest_tsc; | |
2244 | ||
e48672fa ZA |
2245 | if (tsc_delta < 0) |
2246 | mark_tsc_unstable("KVM discovered backwards TSC"); | |
c285545f | 2247 | if (check_tsc_unstable()) { |
e48672fa | 2248 | kvm_x86_ops->adjust_tsc_offset(vcpu, -tsc_delta); |
c285545f | 2249 | vcpu->arch.tsc_catchup = 1; |
c285545f | 2250 | } |
1aa8ceef | 2251 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
c285545f ZA |
2252 | if (vcpu->cpu != cpu) |
2253 | kvm_migrate_timers(vcpu); | |
e48672fa | 2254 | vcpu->cpu = cpu; |
6b7d7e76 | 2255 | } |
c9aaa895 GC |
2256 | |
2257 | accumulate_steal_time(vcpu); | |
2258 | kvm_make_request(KVM_REQ_STEAL_UPDATE, vcpu); | |
313a3dc7 CO |
2259 | } |
2260 | ||
2261 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
2262 | { | |
02daab21 | 2263 | kvm_x86_ops->vcpu_put(vcpu); |
1c11e713 | 2264 | kvm_put_guest_fpu(vcpu); |
d5c1785d | 2265 | vcpu->arch.last_guest_tsc = kvm_x86_ops->read_l1_tsc(vcpu); |
313a3dc7 CO |
2266 | } |
2267 | ||
07716717 | 2268 | static int is_efer_nx(void) |
313a3dc7 | 2269 | { |
e286e86e | 2270 | unsigned long long efer = 0; |
313a3dc7 | 2271 | |
e286e86e | 2272 | rdmsrl_safe(MSR_EFER, &efer); |
07716717 DK |
2273 | return efer & EFER_NX; |
2274 | } | |
2275 | ||
2276 | static void cpuid_fix_nx_cap(struct kvm_vcpu *vcpu) | |
2277 | { | |
2278 | int i; | |
2279 | struct kvm_cpuid_entry2 *e, *entry; | |
2280 | ||
313a3dc7 | 2281 | entry = NULL; |
ad312c7c ZX |
2282 | for (i = 0; i < vcpu->arch.cpuid_nent; ++i) { |
2283 | e = &vcpu->arch.cpuid_entries[i]; | |
313a3dc7 CO |
2284 | if (e->function == 0x80000001) { |
2285 | entry = e; | |
2286 | break; | |
2287 | } | |
2288 | } | |
07716717 | 2289 | if (entry && (entry->edx & (1 << 20)) && !is_efer_nx()) { |
313a3dc7 CO |
2290 | entry->edx &= ~(1 << 20); |
2291 | printk(KERN_INFO "kvm: guest NX capability removed\n"); | |
2292 | } | |
2293 | } | |
2294 | ||
07716717 | 2295 | /* when an old userspace process fills a new kernel module */ |
313a3dc7 CO |
2296 | static int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu *vcpu, |
2297 | struct kvm_cpuid *cpuid, | |
2298 | struct kvm_cpuid_entry __user *entries) | |
07716717 DK |
2299 | { |
2300 | int r, i; | |
2301 | struct kvm_cpuid_entry *cpuid_entries; | |
2302 | ||
2303 | r = -E2BIG; | |
2304 | if (cpuid->nent > KVM_MAX_CPUID_ENTRIES) | |
2305 | goto out; | |
2306 | r = -ENOMEM; | |
2307 | cpuid_entries = vmalloc(sizeof(struct kvm_cpuid_entry) * cpuid->nent); | |
2308 | if (!cpuid_entries) | |
2309 | goto out; | |
2310 | r = -EFAULT; | |
2311 | if (copy_from_user(cpuid_entries, entries, | |
2312 | cpuid->nent * sizeof(struct kvm_cpuid_entry))) | |
2313 | goto out_free; | |
2314 | for (i = 0; i < cpuid->nent; i++) { | |
ad312c7c ZX |
2315 | vcpu->arch.cpuid_entries[i].function = cpuid_entries[i].function; |
2316 | vcpu->arch.cpuid_entries[i].eax = cpuid_entries[i].eax; | |
2317 | vcpu->arch.cpuid_entries[i].ebx = cpuid_entries[i].ebx; | |
2318 | vcpu->arch.cpuid_entries[i].ecx = cpuid_entries[i].ecx; | |
2319 | vcpu->arch.cpuid_entries[i].edx = cpuid_entries[i].edx; | |
2320 | vcpu->arch.cpuid_entries[i].index = 0; | |
2321 | vcpu->arch.cpuid_entries[i].flags = 0; | |
2322 | vcpu->arch.cpuid_entries[i].padding[0] = 0; | |
2323 | vcpu->arch.cpuid_entries[i].padding[1] = 0; | |
2324 | vcpu->arch.cpuid_entries[i].padding[2] = 0; | |
2325 | } | |
2326 | vcpu->arch.cpuid_nent = cpuid->nent; | |
07716717 DK |
2327 | cpuid_fix_nx_cap(vcpu); |
2328 | r = 0; | |
fc61b800 | 2329 | kvm_apic_set_version(vcpu); |
0e851880 | 2330 | kvm_x86_ops->cpuid_update(vcpu); |
2acf923e | 2331 | update_cpuid(vcpu); |
07716717 DK |
2332 | |
2333 | out_free: | |
2334 | vfree(cpuid_entries); | |
2335 | out: | |
2336 | return r; | |
2337 | } | |
2338 | ||
2339 | static int kvm_vcpu_ioctl_set_cpuid2(struct kvm_vcpu *vcpu, | |
19355475 AS |
2340 | struct kvm_cpuid2 *cpuid, |
2341 | struct kvm_cpuid_entry2 __user *entries) | |
313a3dc7 CO |
2342 | { |
2343 | int r; | |
2344 | ||
2345 | r = -E2BIG; | |
2346 | if (cpuid->nent > KVM_MAX_CPUID_ENTRIES) | |
2347 | goto out; | |
2348 | r = -EFAULT; | |
ad312c7c | 2349 | if (copy_from_user(&vcpu->arch.cpuid_entries, entries, |
07716717 | 2350 | cpuid->nent * sizeof(struct kvm_cpuid_entry2))) |
313a3dc7 | 2351 | goto out; |
ad312c7c | 2352 | vcpu->arch.cpuid_nent = cpuid->nent; |
fc61b800 | 2353 | kvm_apic_set_version(vcpu); |
0e851880 | 2354 | kvm_x86_ops->cpuid_update(vcpu); |
2acf923e | 2355 | update_cpuid(vcpu); |
313a3dc7 CO |
2356 | return 0; |
2357 | ||
2358 | out: | |
2359 | return r; | |
2360 | } | |
2361 | ||
07716717 | 2362 | static int kvm_vcpu_ioctl_get_cpuid2(struct kvm_vcpu *vcpu, |
19355475 AS |
2363 | struct kvm_cpuid2 *cpuid, |
2364 | struct kvm_cpuid_entry2 __user *entries) | |
07716717 DK |
2365 | { |
2366 | int r; | |
2367 | ||
2368 | r = -E2BIG; | |
ad312c7c | 2369 | if (cpuid->nent < vcpu->arch.cpuid_nent) |
07716717 DK |
2370 | goto out; |
2371 | r = -EFAULT; | |
ad312c7c | 2372 | if (copy_to_user(entries, &vcpu->arch.cpuid_entries, |
19355475 | 2373 | vcpu->arch.cpuid_nent * sizeof(struct kvm_cpuid_entry2))) |
07716717 DK |
2374 | goto out; |
2375 | return 0; | |
2376 | ||
2377 | out: | |
ad312c7c | 2378 | cpuid->nent = vcpu->arch.cpuid_nent; |
07716717 DK |
2379 | return r; |
2380 | } | |
2381 | ||
945ee35e AK |
2382 | static void cpuid_mask(u32 *word, int wordnum) |
2383 | { | |
2384 | *word &= boot_cpu_data.x86_capability[wordnum]; | |
2385 | } | |
2386 | ||
07716717 | 2387 | static void do_cpuid_1_ent(struct kvm_cpuid_entry2 *entry, u32 function, |
19355475 | 2388 | u32 index) |
07716717 DK |
2389 | { |
2390 | entry->function = function; | |
2391 | entry->index = index; | |
2392 | cpuid_count(entry->function, entry->index, | |
19355475 | 2393 | &entry->eax, &entry->ebx, &entry->ecx, &entry->edx); |
07716717 DK |
2394 | entry->flags = 0; |
2395 | } | |
2396 | ||
24c82e57 AK |
2397 | static bool supported_xcr0_bit(unsigned bit) |
2398 | { | |
2399 | u64 mask = ((u64)1 << bit); | |
2400 | ||
2401 | return mask & (XSTATE_FP | XSTATE_SSE | XSTATE_YMM) & host_xcr0; | |
2402 | } | |
2403 | ||
7faa4ee1 AK |
2404 | #define F(x) bit(X86_FEATURE_##x) |
2405 | ||
07716717 DK |
2406 | static void do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function, |
2407 | u32 index, int *nent, int maxnent) | |
2408 | { | |
7faa4ee1 | 2409 | unsigned f_nx = is_efer_nx() ? F(NX) : 0; |
07716717 | 2410 | #ifdef CONFIG_X86_64 |
17cc3935 SY |
2411 | unsigned f_gbpages = (kvm_x86_ops->get_lpage_level() == PT_PDPE_LEVEL) |
2412 | ? F(GBPAGES) : 0; | |
7faa4ee1 AK |
2413 | unsigned f_lm = F(LM); |
2414 | #else | |
17cc3935 | 2415 | unsigned f_gbpages = 0; |
7faa4ee1 | 2416 | unsigned f_lm = 0; |
07716717 | 2417 | #endif |
4e47c7a6 | 2418 | unsigned f_rdtscp = kvm_x86_ops->rdtscp_supported() ? F(RDTSCP) : 0; |
7faa4ee1 AK |
2419 | |
2420 | /* cpuid 1.edx */ | |
2421 | const u32 kvm_supported_word0_x86_features = | |
2422 | F(FPU) | F(VME) | F(DE) | F(PSE) | | |
2423 | F(TSC) | F(MSR) | F(PAE) | F(MCE) | | |
2424 | F(CX8) | F(APIC) | 0 /* Reserved */ | F(SEP) | | |
2425 | F(MTRR) | F(PGE) | F(MCA) | F(CMOV) | | |
2426 | F(PAT) | F(PSE36) | 0 /* PSN */ | F(CLFLSH) | | |
2427 | 0 /* Reserved, DS, ACPI */ | F(MMX) | | |
2428 | F(FXSR) | F(XMM) | F(XMM2) | F(SELFSNOOP) | | |
2429 | 0 /* HTT, TM, Reserved, PBE */; | |
2430 | /* cpuid 0x80000001.edx */ | |
2431 | const u32 kvm_supported_word1_x86_features = | |
2432 | F(FPU) | F(VME) | F(DE) | F(PSE) | | |
2433 | F(TSC) | F(MSR) | F(PAE) | F(MCE) | | |
2434 | F(CX8) | F(APIC) | 0 /* Reserved */ | F(SYSCALL) | | |
2435 | F(MTRR) | F(PGE) | F(MCA) | F(CMOV) | | |
2436 | F(PAT) | F(PSE36) | 0 /* Reserved */ | | |
2437 | f_nx | 0 /* Reserved */ | F(MMXEXT) | F(MMX) | | |
4e47c7a6 | 2438 | F(FXSR) | F(FXSR_OPT) | f_gbpages | f_rdtscp | |
7faa4ee1 AK |
2439 | 0 /* Reserved */ | f_lm | F(3DNOWEXT) | F(3DNOW); |
2440 | /* cpuid 1.ecx */ | |
2441 | const u32 kvm_supported_word4_x86_features = | |
6c3f6041 | 2442 | F(XMM3) | F(PCLMULQDQ) | 0 /* DTES64, MONITOR */ | |
d149c731 AK |
2443 | 0 /* DS-CPL, VMX, SMX, EST */ | |
2444 | 0 /* TM2 */ | F(SSSE3) | 0 /* CNXT-ID */ | 0 /* Reserved */ | | |
2445 | 0 /* Reserved */ | F(CX16) | 0 /* xTPR Update, PDCM */ | | |
2446 | 0 /* Reserved, DCA */ | F(XMM4_1) | | |
0105d1a5 | 2447 | F(XMM4_2) | F(X2APIC) | F(MOVBE) | F(POPCNT) | |
6d886fd0 | 2448 | 0 /* Reserved*/ | F(AES) | F(XSAVE) | 0 /* OSXSAVE */ | F(AVX) | |
4a00efdf | 2449 | F(F16C) | F(RDRAND); |
7faa4ee1 | 2450 | /* cpuid 0x80000001.ecx */ |
07716717 | 2451 | const u32 kvm_supported_word6_x86_features = |
4c62a2dc | 2452 | F(LAHF_LM) | F(CMP_LEGACY) | 0 /*SVM*/ | 0 /* ExtApicSpace */ | |
7faa4ee1 | 2453 | F(CR8_LEGACY) | F(ABM) | F(SSE4A) | F(MISALIGNSSE) | |
7ef8aa72 | 2454 | F(3DNOWPREFETCH) | 0 /* OSVW */ | 0 /* IBS */ | F(XOP) | |
6d886fd0 | 2455 | 0 /* SKINIT, WDT, LWP */ | F(FMA4) | F(TBM); |
07716717 | 2456 | |
4429d5dc B |
2457 | /* cpuid 0xC0000001.edx */ |
2458 | const u32 kvm_supported_word5_x86_features = | |
2459 | F(XSTORE) | F(XSTORE_EN) | F(XCRYPT) | F(XCRYPT_EN) | | |
2460 | F(ACE2) | F(ACE2_EN) | F(PHE) | F(PHE_EN) | | |
2461 | F(PMM) | F(PMM_EN); | |
2462 | ||
611c120f YW |
2463 | /* cpuid 7.0.ebx */ |
2464 | const u32 kvm_supported_word9_x86_features = | |
a01c8f9b | 2465 | F(SMEP) | F(FSGSBASE) | F(ERMS); |
611c120f | 2466 | |
19355475 | 2467 | /* all calls to cpuid_count() should be made on the same cpu */ |
07716717 DK |
2468 | get_cpu(); |
2469 | do_cpuid_1_ent(entry, function, index); | |
2470 | ++*nent; | |
2471 | ||
2472 | switch (function) { | |
2473 | case 0: | |
2acf923e | 2474 | entry->eax = min(entry->eax, (u32)0xd); |
07716717 DK |
2475 | break; |
2476 | case 1: | |
2477 | entry->edx &= kvm_supported_word0_x86_features; | |
945ee35e | 2478 | cpuid_mask(&entry->edx, 0); |
7faa4ee1 | 2479 | entry->ecx &= kvm_supported_word4_x86_features; |
945ee35e | 2480 | cpuid_mask(&entry->ecx, 4); |
0d1de2d9 GN |
2481 | /* we support x2apic emulation even if host does not support |
2482 | * it since we emulate x2apic in software */ | |
2483 | entry->ecx |= F(X2APIC); | |
07716717 DK |
2484 | break; |
2485 | /* function 2 entries are STATEFUL. That is, repeated cpuid commands | |
2486 | * may return different values. This forces us to get_cpu() before | |
2487 | * issuing the first command, and also to emulate this annoying behavior | |
2488 | * in kvm_emulate_cpuid() using KVM_CPUID_FLAG_STATE_READ_NEXT */ | |
2489 | case 2: { | |
2490 | int t, times = entry->eax & 0xff; | |
2491 | ||
2492 | entry->flags |= KVM_CPUID_FLAG_STATEFUL_FUNC; | |
0fdf8e59 | 2493 | entry->flags |= KVM_CPUID_FLAG_STATE_READ_NEXT; |
07716717 DK |
2494 | for (t = 1; t < times && *nent < maxnent; ++t) { |
2495 | do_cpuid_1_ent(&entry[t], function, 0); | |
2496 | entry[t].flags |= KVM_CPUID_FLAG_STATEFUL_FUNC; | |
2497 | ++*nent; | |
2498 | } | |
2499 | break; | |
2500 | } | |
611c120f | 2501 | /* function 4 has additional index. */ |
07716717 | 2502 | case 4: { |
14af3f3c | 2503 | int i, cache_type; |
07716717 DK |
2504 | |
2505 | entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX; | |
2506 | /* read more entries until cache_type is zero */ | |
14af3f3c HH |
2507 | for (i = 1; *nent < maxnent; ++i) { |
2508 | cache_type = entry[i - 1].eax & 0x1f; | |
07716717 DK |
2509 | if (!cache_type) |
2510 | break; | |
14af3f3c HH |
2511 | do_cpuid_1_ent(&entry[i], function, i); |
2512 | entry[i].flags |= | |
07716717 DK |
2513 | KVM_CPUID_FLAG_SIGNIFCANT_INDEX; |
2514 | ++*nent; | |
2515 | } | |
2516 | break; | |
2517 | } | |
611c120f YW |
2518 | case 7: { |
2519 | entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX; | |
2520 | /* Mask ebx against host capbability word 9 */ | |
2521 | if (index == 0) { | |
2522 | entry->ebx &= kvm_supported_word9_x86_features; | |
2523 | cpuid_mask(&entry->ebx, 9); | |
2524 | } else | |
2525 | entry->ebx = 0; | |
2526 | entry->eax = 0; | |
2527 | entry->ecx = 0; | |
2528 | entry->edx = 0; | |
2529 | break; | |
2530 | } | |
24c82e57 AK |
2531 | case 9: |
2532 | break; | |
611c120f | 2533 | /* function 0xb has additional index. */ |
07716717 | 2534 | case 0xb: { |
14af3f3c | 2535 | int i, level_type; |
07716717 DK |
2536 | |
2537 | entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX; | |
2538 | /* read more entries until level_type is zero */ | |
14af3f3c | 2539 | for (i = 1; *nent < maxnent; ++i) { |
0853d2c1 | 2540 | level_type = entry[i - 1].ecx & 0xff00; |
07716717 DK |
2541 | if (!level_type) |
2542 | break; | |
14af3f3c HH |
2543 | do_cpuid_1_ent(&entry[i], function, i); |
2544 | entry[i].flags |= | |
07716717 DK |
2545 | KVM_CPUID_FLAG_SIGNIFCANT_INDEX; |
2546 | ++*nent; | |
2547 | } | |
2548 | break; | |
2549 | } | |
2acf923e | 2550 | case 0xd: { |
02668b06 | 2551 | int idx, i; |
2acf923e DC |
2552 | |
2553 | entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX; | |
02668b06 AP |
2554 | for (idx = 1, i = 1; *nent < maxnent && idx < 64; ++idx) { |
2555 | do_cpuid_1_ent(&entry[i], function, idx); | |
2556 | if (entry[i].eax == 0 || !supported_xcr0_bit(idx)) | |
20800bc9 | 2557 | continue; |
2acf923e DC |
2558 | entry[i].flags |= |
2559 | KVM_CPUID_FLAG_SIGNIFCANT_INDEX; | |
2560 | ++*nent; | |
02668b06 | 2561 | ++i; |
2acf923e DC |
2562 | } |
2563 | break; | |
2564 | } | |
84478c82 GC |
2565 | case KVM_CPUID_SIGNATURE: { |
2566 | char signature[12] = "KVMKVMKVM\0\0"; | |
2567 | u32 *sigptr = (u32 *)signature; | |
2568 | entry->eax = 0; | |
2569 | entry->ebx = sigptr[0]; | |
2570 | entry->ecx = sigptr[1]; | |
2571 | entry->edx = sigptr[2]; | |
2572 | break; | |
2573 | } | |
2574 | case KVM_CPUID_FEATURES: | |
2575 | entry->eax = (1 << KVM_FEATURE_CLOCKSOURCE) | | |
2576 | (1 << KVM_FEATURE_NOP_IO_DELAY) | | |
371bcf64 | 2577 | (1 << KVM_FEATURE_CLOCKSOURCE2) | |
32918924 | 2578 | (1 << KVM_FEATURE_ASYNC_PF) | |
371bcf64 | 2579 | (1 << KVM_FEATURE_CLOCKSOURCE_STABLE_BIT); |
c9aaa895 GC |
2580 | |
2581 | if (sched_info_on()) | |
2582 | entry->eax |= (1 << KVM_FEATURE_STEAL_TIME); | |
2583 | ||
84478c82 GC |
2584 | entry->ebx = 0; |
2585 | entry->ecx = 0; | |
2586 | entry->edx = 0; | |
2587 | break; | |
07716717 DK |
2588 | case 0x80000000: |
2589 | entry->eax = min(entry->eax, 0x8000001a); | |
2590 | break; | |
2591 | case 0x80000001: | |
2592 | entry->edx &= kvm_supported_word1_x86_features; | |
945ee35e | 2593 | cpuid_mask(&entry->edx, 1); |
07716717 | 2594 | entry->ecx &= kvm_supported_word6_x86_features; |
945ee35e | 2595 | cpuid_mask(&entry->ecx, 6); |
07716717 | 2596 | break; |
24c82e57 AK |
2597 | case 0x80000008: { |
2598 | unsigned g_phys_as = (entry->eax >> 16) & 0xff; | |
2599 | unsigned virt_as = max((entry->eax >> 8) & 0xff, 48U); | |
2600 | unsigned phys_as = entry->eax & 0xff; | |
2601 | ||
2602 | if (!g_phys_as) | |
2603 | g_phys_as = phys_as; | |
2604 | entry->eax = g_phys_as | (virt_as << 8); | |
2605 | entry->ebx = entry->edx = 0; | |
2606 | break; | |
2607 | } | |
2608 | case 0x80000019: | |
2609 | entry->ecx = entry->edx = 0; | |
2610 | break; | |
2611 | case 0x8000001a: | |
2612 | break; | |
2613 | case 0x8000001d: | |
2614 | break; | |
4429d5dc B |
2615 | /*Add support for Centaur's CPUID instruction*/ |
2616 | case 0xC0000000: | |
2617 | /*Just support up to 0xC0000004 now*/ | |
2618 | entry->eax = min(entry->eax, 0xC0000004); | |
2619 | break; | |
2620 | case 0xC0000001: | |
2621 | entry->edx &= kvm_supported_word5_x86_features; | |
2622 | cpuid_mask(&entry->edx, 5); | |
2623 | break; | |
24c82e57 AK |
2624 | case 3: /* Processor serial number */ |
2625 | case 5: /* MONITOR/MWAIT */ | |
2626 | case 6: /* Thermal management */ | |
2627 | case 0xA: /* Architectural Performance Monitoring */ | |
2628 | case 0x80000007: /* Advanced power management */ | |
4429d5dc B |
2629 | case 0xC0000002: |
2630 | case 0xC0000003: | |
2631 | case 0xC0000004: | |
24c82e57 AK |
2632 | default: |
2633 | entry->eax = entry->ebx = entry->ecx = entry->edx = 0; | |
4429d5dc | 2634 | break; |
07716717 | 2635 | } |
d4330ef2 JR |
2636 | |
2637 | kvm_x86_ops->set_supported_cpuid(function, entry); | |
2638 | ||
07716717 DK |
2639 | put_cpu(); |
2640 | } | |
2641 | ||
7faa4ee1 AK |
2642 | #undef F |
2643 | ||
674eea0f | 2644 | static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2 *cpuid, |
19355475 | 2645 | struct kvm_cpuid_entry2 __user *entries) |
07716717 DK |
2646 | { |
2647 | struct kvm_cpuid_entry2 *cpuid_entries; | |
2648 | int limit, nent = 0, r = -E2BIG; | |
2649 | u32 func; | |
2650 | ||
2651 | if (cpuid->nent < 1) | |
2652 | goto out; | |
6a544355 AK |
2653 | if (cpuid->nent > KVM_MAX_CPUID_ENTRIES) |
2654 | cpuid->nent = KVM_MAX_CPUID_ENTRIES; | |
07716717 DK |
2655 | r = -ENOMEM; |
2656 | cpuid_entries = vmalloc(sizeof(struct kvm_cpuid_entry2) * cpuid->nent); | |
2657 | if (!cpuid_entries) | |
2658 | goto out; | |
2659 | ||
2660 | do_cpuid_ent(&cpuid_entries[0], 0, 0, &nent, cpuid->nent); | |
2661 | limit = cpuid_entries[0].eax; | |
2662 | for (func = 1; func <= limit && nent < cpuid->nent; ++func) | |
2663 | do_cpuid_ent(&cpuid_entries[nent], func, 0, | |
19355475 | 2664 | &nent, cpuid->nent); |
07716717 DK |
2665 | r = -E2BIG; |
2666 | if (nent >= cpuid->nent) | |
2667 | goto out_free; | |
2668 | ||
2669 | do_cpuid_ent(&cpuid_entries[nent], 0x80000000, 0, &nent, cpuid->nent); | |
2670 | limit = cpuid_entries[nent - 1].eax; | |
2671 | for (func = 0x80000001; func <= limit && nent < cpuid->nent; ++func) | |
2672 | do_cpuid_ent(&cpuid_entries[nent], func, 0, | |
19355475 | 2673 | &nent, cpuid->nent); |
84478c82 GC |
2674 | |
2675 | ||
2676 | ||
2677 | r = -E2BIG; | |
2678 | if (nent >= cpuid->nent) | |
2679 | goto out_free; | |
2680 | ||
4429d5dc B |
2681 | /* Add support for Centaur's CPUID instruction. */ |
2682 | if (boot_cpu_data.x86_vendor == X86_VENDOR_CENTAUR) { | |
2683 | do_cpuid_ent(&cpuid_entries[nent], 0xC0000000, 0, | |
2684 | &nent, cpuid->nent); | |
2685 | ||
2686 | r = -E2BIG; | |
2687 | if (nent >= cpuid->nent) | |
2688 | goto out_free; | |
2689 | ||
2690 | limit = cpuid_entries[nent - 1].eax; | |
2691 | for (func = 0xC0000001; | |
2692 | func <= limit && nent < cpuid->nent; ++func) | |
2693 | do_cpuid_ent(&cpuid_entries[nent], func, 0, | |
2694 | &nent, cpuid->nent); | |
2695 | ||
2696 | r = -E2BIG; | |
2697 | if (nent >= cpuid->nent) | |
2698 | goto out_free; | |
2699 | } | |
2700 | ||
84478c82 GC |
2701 | do_cpuid_ent(&cpuid_entries[nent], KVM_CPUID_SIGNATURE, 0, &nent, |
2702 | cpuid->nent); | |
2703 | ||
2704 | r = -E2BIG; | |
2705 | if (nent >= cpuid->nent) | |
2706 | goto out_free; | |
2707 | ||
2708 | do_cpuid_ent(&cpuid_entries[nent], KVM_CPUID_FEATURES, 0, &nent, | |
2709 | cpuid->nent); | |
2710 | ||
cb007648 MM |
2711 | r = -E2BIG; |
2712 | if (nent >= cpuid->nent) | |
2713 | goto out_free; | |
2714 | ||
07716717 DK |
2715 | r = -EFAULT; |
2716 | if (copy_to_user(entries, cpuid_entries, | |
19355475 | 2717 | nent * sizeof(struct kvm_cpuid_entry2))) |
07716717 DK |
2718 | goto out_free; |
2719 | cpuid->nent = nent; | |
2720 | r = 0; | |
2721 | ||
2722 | out_free: | |
2723 | vfree(cpuid_entries); | |
2724 | out: | |
2725 | return r; | |
2726 | } | |
2727 | ||
313a3dc7 CO |
2728 | static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu *vcpu, |
2729 | struct kvm_lapic_state *s) | |
2730 | { | |
ad312c7c | 2731 | memcpy(s->regs, vcpu->arch.apic->regs, sizeof *s); |
313a3dc7 CO |
2732 | |
2733 | return 0; | |
2734 | } | |
2735 | ||
2736 | static int kvm_vcpu_ioctl_set_lapic(struct kvm_vcpu *vcpu, | |
2737 | struct kvm_lapic_state *s) | |
2738 | { | |
ad312c7c | 2739 | memcpy(vcpu->arch.apic->regs, s->regs, sizeof *s); |
313a3dc7 | 2740 | kvm_apic_post_state_restore(vcpu); |
cb142eb7 | 2741 | update_cr8_intercept(vcpu); |
313a3dc7 CO |
2742 | |
2743 | return 0; | |
2744 | } | |
2745 | ||
f77bc6a4 ZX |
2746 | static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, |
2747 | struct kvm_interrupt *irq) | |
2748 | { | |
2749 | if (irq->irq < 0 || irq->irq >= 256) | |
2750 | return -EINVAL; | |
2751 | if (irqchip_in_kernel(vcpu->kvm)) | |
2752 | return -ENXIO; | |
f77bc6a4 | 2753 | |
66fd3f7f | 2754 | kvm_queue_interrupt(vcpu, irq->irq, false); |
3842d135 | 2755 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
f77bc6a4 | 2756 | |
f77bc6a4 ZX |
2757 | return 0; |
2758 | } | |
2759 | ||
c4abb7c9 JK |
2760 | static int kvm_vcpu_ioctl_nmi(struct kvm_vcpu *vcpu) |
2761 | { | |
c4abb7c9 | 2762 | kvm_inject_nmi(vcpu); |
c4abb7c9 JK |
2763 | |
2764 | return 0; | |
2765 | } | |
2766 | ||
b209749f AK |
2767 | static int vcpu_ioctl_tpr_access_reporting(struct kvm_vcpu *vcpu, |
2768 | struct kvm_tpr_access_ctl *tac) | |
2769 | { | |
2770 | if (tac->flags) | |
2771 | return -EINVAL; | |
2772 | vcpu->arch.tpr_access_reporting = !!tac->enabled; | |
2773 | return 0; | |
2774 | } | |
2775 | ||
890ca9ae HY |
2776 | static int kvm_vcpu_ioctl_x86_setup_mce(struct kvm_vcpu *vcpu, |
2777 | u64 mcg_cap) | |
2778 | { | |
2779 | int r; | |
2780 | unsigned bank_num = mcg_cap & 0xff, bank; | |
2781 | ||
2782 | r = -EINVAL; | |
a9e38c3e | 2783 | if (!bank_num || bank_num >= KVM_MAX_MCE_BANKS) |
890ca9ae HY |
2784 | goto out; |
2785 | if (mcg_cap & ~(KVM_MCE_CAP_SUPPORTED | 0xff | 0xff0000)) | |
2786 | goto out; | |
2787 | r = 0; | |
2788 | vcpu->arch.mcg_cap = mcg_cap; | |
2789 | /* Init IA32_MCG_CTL to all 1s */ | |
2790 | if (mcg_cap & MCG_CTL_P) | |
2791 | vcpu->arch.mcg_ctl = ~(u64)0; | |
2792 | /* Init IA32_MCi_CTL to all 1s */ | |
2793 | for (bank = 0; bank < bank_num; bank++) | |
2794 | vcpu->arch.mce_banks[bank*4] = ~(u64)0; | |
2795 | out: | |
2796 | return r; | |
2797 | } | |
2798 | ||
2799 | static int kvm_vcpu_ioctl_x86_set_mce(struct kvm_vcpu *vcpu, | |
2800 | struct kvm_x86_mce *mce) | |
2801 | { | |
2802 | u64 mcg_cap = vcpu->arch.mcg_cap; | |
2803 | unsigned bank_num = mcg_cap & 0xff; | |
2804 | u64 *banks = vcpu->arch.mce_banks; | |
2805 | ||
2806 | if (mce->bank >= bank_num || !(mce->status & MCI_STATUS_VAL)) | |
2807 | return -EINVAL; | |
2808 | /* | |
2809 | * if IA32_MCG_CTL is not all 1s, the uncorrected error | |
2810 | * reporting is disabled | |
2811 | */ | |
2812 | if ((mce->status & MCI_STATUS_UC) && (mcg_cap & MCG_CTL_P) && | |
2813 | vcpu->arch.mcg_ctl != ~(u64)0) | |
2814 | return 0; | |
2815 | banks += 4 * mce->bank; | |
2816 | /* | |
2817 | * if IA32_MCi_CTL is not all 1s, the uncorrected error | |
2818 | * reporting is disabled for the bank | |
2819 | */ | |
2820 | if ((mce->status & MCI_STATUS_UC) && banks[0] != ~(u64)0) | |
2821 | return 0; | |
2822 | if (mce->status & MCI_STATUS_UC) { | |
2823 | if ((vcpu->arch.mcg_status & MCG_STATUS_MCIP) || | |
fc78f519 | 2824 | !kvm_read_cr4_bits(vcpu, X86_CR4_MCE)) { |
a8eeb04a | 2825 | kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu); |
890ca9ae HY |
2826 | return 0; |
2827 | } | |
2828 | if (banks[1] & MCI_STATUS_VAL) | |
2829 | mce->status |= MCI_STATUS_OVER; | |
2830 | banks[2] = mce->addr; | |
2831 | banks[3] = mce->misc; | |
2832 | vcpu->arch.mcg_status = mce->mcg_status; | |
2833 | banks[1] = mce->status; | |
2834 | kvm_queue_exception(vcpu, MC_VECTOR); | |
2835 | } else if (!(banks[1] & MCI_STATUS_VAL) | |
2836 | || !(banks[1] & MCI_STATUS_UC)) { | |
2837 | if (banks[1] & MCI_STATUS_VAL) | |
2838 | mce->status |= MCI_STATUS_OVER; | |
2839 | banks[2] = mce->addr; | |
2840 | banks[3] = mce->misc; | |
2841 | banks[1] = mce->status; | |
2842 | } else | |
2843 | banks[1] |= MCI_STATUS_OVER; | |
2844 | return 0; | |
2845 | } | |
2846 | ||
3cfc3092 JK |
2847 | static void kvm_vcpu_ioctl_x86_get_vcpu_events(struct kvm_vcpu *vcpu, |
2848 | struct kvm_vcpu_events *events) | |
2849 | { | |
7460fb4a | 2850 | process_nmi(vcpu); |
03b82a30 JK |
2851 | events->exception.injected = |
2852 | vcpu->arch.exception.pending && | |
2853 | !kvm_exception_is_soft(vcpu->arch.exception.nr); | |
3cfc3092 JK |
2854 | events->exception.nr = vcpu->arch.exception.nr; |
2855 | events->exception.has_error_code = vcpu->arch.exception.has_error_code; | |
97e69aa6 | 2856 | events->exception.pad = 0; |
3cfc3092 JK |
2857 | events->exception.error_code = vcpu->arch.exception.error_code; |
2858 | ||
03b82a30 JK |
2859 | events->interrupt.injected = |
2860 | vcpu->arch.interrupt.pending && !vcpu->arch.interrupt.soft; | |
3cfc3092 | 2861 | events->interrupt.nr = vcpu->arch.interrupt.nr; |
03b82a30 | 2862 | events->interrupt.soft = 0; |
48005f64 JK |
2863 | events->interrupt.shadow = |
2864 | kvm_x86_ops->get_interrupt_shadow(vcpu, | |
2865 | KVM_X86_SHADOW_INT_MOV_SS | KVM_X86_SHADOW_INT_STI); | |
3cfc3092 JK |
2866 | |
2867 | events->nmi.injected = vcpu->arch.nmi_injected; | |
7460fb4a | 2868 | events->nmi.pending = vcpu->arch.nmi_pending != 0; |
3cfc3092 | 2869 | events->nmi.masked = kvm_x86_ops->get_nmi_mask(vcpu); |
97e69aa6 | 2870 | events->nmi.pad = 0; |
3cfc3092 JK |
2871 | |
2872 | events->sipi_vector = vcpu->arch.sipi_vector; | |
2873 | ||
dab4b911 | 2874 | events->flags = (KVM_VCPUEVENT_VALID_NMI_PENDING |
48005f64 JK |
2875 | | KVM_VCPUEVENT_VALID_SIPI_VECTOR |
2876 | | KVM_VCPUEVENT_VALID_SHADOW); | |
97e69aa6 | 2877 | memset(&events->reserved, 0, sizeof(events->reserved)); |
3cfc3092 JK |
2878 | } |
2879 | ||
2880 | static int kvm_vcpu_ioctl_x86_set_vcpu_events(struct kvm_vcpu *vcpu, | |
2881 | struct kvm_vcpu_events *events) | |
2882 | { | |
dab4b911 | 2883 | if (events->flags & ~(KVM_VCPUEVENT_VALID_NMI_PENDING |
48005f64 JK |
2884 | | KVM_VCPUEVENT_VALID_SIPI_VECTOR |
2885 | | KVM_VCPUEVENT_VALID_SHADOW)) | |
3cfc3092 JK |
2886 | return -EINVAL; |
2887 | ||
7460fb4a | 2888 | process_nmi(vcpu); |
3cfc3092 JK |
2889 | vcpu->arch.exception.pending = events->exception.injected; |
2890 | vcpu->arch.exception.nr = events->exception.nr; | |
2891 | vcpu->arch.exception.has_error_code = events->exception.has_error_code; | |
2892 | vcpu->arch.exception.error_code = events->exception.error_code; | |
2893 | ||
2894 | vcpu->arch.interrupt.pending = events->interrupt.injected; | |
2895 | vcpu->arch.interrupt.nr = events->interrupt.nr; | |
2896 | vcpu->arch.interrupt.soft = events->interrupt.soft; | |
48005f64 JK |
2897 | if (events->flags & KVM_VCPUEVENT_VALID_SHADOW) |
2898 | kvm_x86_ops->set_interrupt_shadow(vcpu, | |
2899 | events->interrupt.shadow); | |
3cfc3092 JK |
2900 | |
2901 | vcpu->arch.nmi_injected = events->nmi.injected; | |
dab4b911 JK |
2902 | if (events->flags & KVM_VCPUEVENT_VALID_NMI_PENDING) |
2903 | vcpu->arch.nmi_pending = events->nmi.pending; | |
3cfc3092 JK |
2904 | kvm_x86_ops->set_nmi_mask(vcpu, events->nmi.masked); |
2905 | ||
dab4b911 JK |
2906 | if (events->flags & KVM_VCPUEVENT_VALID_SIPI_VECTOR) |
2907 | vcpu->arch.sipi_vector = events->sipi_vector; | |
3cfc3092 | 2908 | |
3842d135 AK |
2909 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
2910 | ||
3cfc3092 JK |
2911 | return 0; |
2912 | } | |
2913 | ||
a1efbe77 JK |
2914 | static void kvm_vcpu_ioctl_x86_get_debugregs(struct kvm_vcpu *vcpu, |
2915 | struct kvm_debugregs *dbgregs) | |
2916 | { | |
a1efbe77 JK |
2917 | memcpy(dbgregs->db, vcpu->arch.db, sizeof(vcpu->arch.db)); |
2918 | dbgregs->dr6 = vcpu->arch.dr6; | |
2919 | dbgregs->dr7 = vcpu->arch.dr7; | |
2920 | dbgregs->flags = 0; | |
97e69aa6 | 2921 | memset(&dbgregs->reserved, 0, sizeof(dbgregs->reserved)); |
a1efbe77 JK |
2922 | } |
2923 | ||
2924 | static int kvm_vcpu_ioctl_x86_set_debugregs(struct kvm_vcpu *vcpu, | |
2925 | struct kvm_debugregs *dbgregs) | |
2926 | { | |
2927 | if (dbgregs->flags) | |
2928 | return -EINVAL; | |
2929 | ||
a1efbe77 JK |
2930 | memcpy(vcpu->arch.db, dbgregs->db, sizeof(vcpu->arch.db)); |
2931 | vcpu->arch.dr6 = dbgregs->dr6; | |
2932 | vcpu->arch.dr7 = dbgregs->dr7; | |
2933 | ||
a1efbe77 JK |
2934 | return 0; |
2935 | } | |
2936 | ||
2d5b5a66 SY |
2937 | static void kvm_vcpu_ioctl_x86_get_xsave(struct kvm_vcpu *vcpu, |
2938 | struct kvm_xsave *guest_xsave) | |
2939 | { | |
2940 | if (cpu_has_xsave) | |
2941 | memcpy(guest_xsave->region, | |
2942 | &vcpu->arch.guest_fpu.state->xsave, | |
f45755b8 | 2943 | xstate_size); |
2d5b5a66 SY |
2944 | else { |
2945 | memcpy(guest_xsave->region, | |
2946 | &vcpu->arch.guest_fpu.state->fxsave, | |
2947 | sizeof(struct i387_fxsave_struct)); | |
2948 | *(u64 *)&guest_xsave->region[XSAVE_HDR_OFFSET / sizeof(u32)] = | |
2949 | XSTATE_FPSSE; | |
2950 | } | |
2951 | } | |
2952 | ||
2953 | static int kvm_vcpu_ioctl_x86_set_xsave(struct kvm_vcpu *vcpu, | |
2954 | struct kvm_xsave *guest_xsave) | |
2955 | { | |
2956 | u64 xstate_bv = | |
2957 | *(u64 *)&guest_xsave->region[XSAVE_HDR_OFFSET / sizeof(u32)]; | |
2958 | ||
2959 | if (cpu_has_xsave) | |
2960 | memcpy(&vcpu->arch.guest_fpu.state->xsave, | |
f45755b8 | 2961 | guest_xsave->region, xstate_size); |
2d5b5a66 SY |
2962 | else { |
2963 | if (xstate_bv & ~XSTATE_FPSSE) | |
2964 | return -EINVAL; | |
2965 | memcpy(&vcpu->arch.guest_fpu.state->fxsave, | |
2966 | guest_xsave->region, sizeof(struct i387_fxsave_struct)); | |
2967 | } | |
2968 | return 0; | |
2969 | } | |
2970 | ||
2971 | static void kvm_vcpu_ioctl_x86_get_xcrs(struct kvm_vcpu *vcpu, | |
2972 | struct kvm_xcrs *guest_xcrs) | |
2973 | { | |
2974 | if (!cpu_has_xsave) { | |
2975 | guest_xcrs->nr_xcrs = 0; | |
2976 | return; | |
2977 | } | |
2978 | ||
2979 | guest_xcrs->nr_xcrs = 1; | |
2980 | guest_xcrs->flags = 0; | |
2981 | guest_xcrs->xcrs[0].xcr = XCR_XFEATURE_ENABLED_MASK; | |
2982 | guest_xcrs->xcrs[0].value = vcpu->arch.xcr0; | |
2983 | } | |
2984 | ||
2985 | static int kvm_vcpu_ioctl_x86_set_xcrs(struct kvm_vcpu *vcpu, | |
2986 | struct kvm_xcrs *guest_xcrs) | |
2987 | { | |
2988 | int i, r = 0; | |
2989 | ||
2990 | if (!cpu_has_xsave) | |
2991 | return -EINVAL; | |
2992 | ||
2993 | if (guest_xcrs->nr_xcrs > KVM_MAX_XCRS || guest_xcrs->flags) | |
2994 | return -EINVAL; | |
2995 | ||
2996 | for (i = 0; i < guest_xcrs->nr_xcrs; i++) | |
2997 | /* Only support XCR0 currently */ | |
2998 | if (guest_xcrs->xcrs[0].xcr == XCR_XFEATURE_ENABLED_MASK) { | |
2999 | r = __kvm_set_xcr(vcpu, XCR_XFEATURE_ENABLED_MASK, | |
3000 | guest_xcrs->xcrs[0].value); | |
3001 | break; | |
3002 | } | |
3003 | if (r) | |
3004 | r = -EINVAL; | |
3005 | return r; | |
3006 | } | |
3007 | ||
313a3dc7 CO |
3008 | long kvm_arch_vcpu_ioctl(struct file *filp, |
3009 | unsigned int ioctl, unsigned long arg) | |
3010 | { | |
3011 | struct kvm_vcpu *vcpu = filp->private_data; | |
3012 | void __user *argp = (void __user *)arg; | |
3013 | int r; | |
d1ac91d8 AK |
3014 | union { |
3015 | struct kvm_lapic_state *lapic; | |
3016 | struct kvm_xsave *xsave; | |
3017 | struct kvm_xcrs *xcrs; | |
3018 | void *buffer; | |
3019 | } u; | |
3020 | ||
3021 | u.buffer = NULL; | |
313a3dc7 CO |
3022 | switch (ioctl) { |
3023 | case KVM_GET_LAPIC: { | |
2204ae3c MT |
3024 | r = -EINVAL; |
3025 | if (!vcpu->arch.apic) | |
3026 | goto out; | |
d1ac91d8 | 3027 | u.lapic = kzalloc(sizeof(struct kvm_lapic_state), GFP_KERNEL); |
313a3dc7 | 3028 | |
b772ff36 | 3029 | r = -ENOMEM; |
d1ac91d8 | 3030 | if (!u.lapic) |
b772ff36 | 3031 | goto out; |
d1ac91d8 | 3032 | r = kvm_vcpu_ioctl_get_lapic(vcpu, u.lapic); |
313a3dc7 CO |
3033 | if (r) |
3034 | goto out; | |
3035 | r = -EFAULT; | |
d1ac91d8 | 3036 | if (copy_to_user(argp, u.lapic, sizeof(struct kvm_lapic_state))) |
313a3dc7 CO |
3037 | goto out; |
3038 | r = 0; | |
3039 | break; | |
3040 | } | |
3041 | case KVM_SET_LAPIC: { | |
2204ae3c MT |
3042 | r = -EINVAL; |
3043 | if (!vcpu->arch.apic) | |
3044 | goto out; | |
d1ac91d8 | 3045 | u.lapic = kmalloc(sizeof(struct kvm_lapic_state), GFP_KERNEL); |
b772ff36 | 3046 | r = -ENOMEM; |
d1ac91d8 | 3047 | if (!u.lapic) |
b772ff36 | 3048 | goto out; |
313a3dc7 | 3049 | r = -EFAULT; |
d1ac91d8 | 3050 | if (copy_from_user(u.lapic, argp, sizeof(struct kvm_lapic_state))) |
313a3dc7 | 3051 | goto out; |
d1ac91d8 | 3052 | r = kvm_vcpu_ioctl_set_lapic(vcpu, u.lapic); |
313a3dc7 CO |
3053 | if (r) |
3054 | goto out; | |
3055 | r = 0; | |
3056 | break; | |
3057 | } | |
f77bc6a4 ZX |
3058 | case KVM_INTERRUPT: { |
3059 | struct kvm_interrupt irq; | |
3060 | ||
3061 | r = -EFAULT; | |
3062 | if (copy_from_user(&irq, argp, sizeof irq)) | |
3063 | goto out; | |
3064 | r = kvm_vcpu_ioctl_interrupt(vcpu, &irq); | |
3065 | if (r) | |
3066 | goto out; | |
3067 | r = 0; | |
3068 | break; | |
3069 | } | |
c4abb7c9 JK |
3070 | case KVM_NMI: { |
3071 | r = kvm_vcpu_ioctl_nmi(vcpu); | |
3072 | if (r) | |
3073 | goto out; | |
3074 | r = 0; | |
3075 | break; | |
3076 | } | |
313a3dc7 CO |
3077 | case KVM_SET_CPUID: { |
3078 | struct kvm_cpuid __user *cpuid_arg = argp; | |
3079 | struct kvm_cpuid cpuid; | |
3080 | ||
3081 | r = -EFAULT; | |
3082 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
3083 | goto out; | |
3084 | r = kvm_vcpu_ioctl_set_cpuid(vcpu, &cpuid, cpuid_arg->entries); | |
3085 | if (r) | |
3086 | goto out; | |
3087 | break; | |
3088 | } | |
07716717 DK |
3089 | case KVM_SET_CPUID2: { |
3090 | struct kvm_cpuid2 __user *cpuid_arg = argp; | |
3091 | struct kvm_cpuid2 cpuid; | |
3092 | ||
3093 | r = -EFAULT; | |
3094 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
3095 | goto out; | |
3096 | r = kvm_vcpu_ioctl_set_cpuid2(vcpu, &cpuid, | |
19355475 | 3097 | cpuid_arg->entries); |
07716717 DK |
3098 | if (r) |
3099 | goto out; | |
3100 | break; | |
3101 | } | |
3102 | case KVM_GET_CPUID2: { | |
3103 | struct kvm_cpuid2 __user *cpuid_arg = argp; | |
3104 | struct kvm_cpuid2 cpuid; | |
3105 | ||
3106 | r = -EFAULT; | |
3107 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
3108 | goto out; | |
3109 | r = kvm_vcpu_ioctl_get_cpuid2(vcpu, &cpuid, | |
19355475 | 3110 | cpuid_arg->entries); |
07716717 DK |
3111 | if (r) |
3112 | goto out; | |
3113 | r = -EFAULT; | |
3114 | if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid)) | |
3115 | goto out; | |
3116 | r = 0; | |
3117 | break; | |
3118 | } | |
313a3dc7 CO |
3119 | case KVM_GET_MSRS: |
3120 | r = msr_io(vcpu, argp, kvm_get_msr, 1); | |
3121 | break; | |
3122 | case KVM_SET_MSRS: | |
3123 | r = msr_io(vcpu, argp, do_set_msr, 0); | |
3124 | break; | |
b209749f AK |
3125 | case KVM_TPR_ACCESS_REPORTING: { |
3126 | struct kvm_tpr_access_ctl tac; | |
3127 | ||
3128 | r = -EFAULT; | |
3129 | if (copy_from_user(&tac, argp, sizeof tac)) | |
3130 | goto out; | |
3131 | r = vcpu_ioctl_tpr_access_reporting(vcpu, &tac); | |
3132 | if (r) | |
3133 | goto out; | |
3134 | r = -EFAULT; | |
3135 | if (copy_to_user(argp, &tac, sizeof tac)) | |
3136 | goto out; | |
3137 | r = 0; | |
3138 | break; | |
3139 | }; | |
b93463aa AK |
3140 | case KVM_SET_VAPIC_ADDR: { |
3141 | struct kvm_vapic_addr va; | |
3142 | ||
3143 | r = -EINVAL; | |
3144 | if (!irqchip_in_kernel(vcpu->kvm)) | |
3145 | goto out; | |
3146 | r = -EFAULT; | |
3147 | if (copy_from_user(&va, argp, sizeof va)) | |
3148 | goto out; | |
3149 | r = 0; | |
3150 | kvm_lapic_set_vapic_addr(vcpu, va.vapic_addr); | |
3151 | break; | |
3152 | } | |
890ca9ae HY |
3153 | case KVM_X86_SETUP_MCE: { |
3154 | u64 mcg_cap; | |
3155 | ||
3156 | r = -EFAULT; | |
3157 | if (copy_from_user(&mcg_cap, argp, sizeof mcg_cap)) | |
3158 | goto out; | |
3159 | r = kvm_vcpu_ioctl_x86_setup_mce(vcpu, mcg_cap); | |
3160 | break; | |
3161 | } | |
3162 | case KVM_X86_SET_MCE: { | |
3163 | struct kvm_x86_mce mce; | |
3164 | ||
3165 | r = -EFAULT; | |
3166 | if (copy_from_user(&mce, argp, sizeof mce)) | |
3167 | goto out; | |
3168 | r = kvm_vcpu_ioctl_x86_set_mce(vcpu, &mce); | |
3169 | break; | |
3170 | } | |
3cfc3092 JK |
3171 | case KVM_GET_VCPU_EVENTS: { |
3172 | struct kvm_vcpu_events events; | |
3173 | ||
3174 | kvm_vcpu_ioctl_x86_get_vcpu_events(vcpu, &events); | |
3175 | ||
3176 | r = -EFAULT; | |
3177 | if (copy_to_user(argp, &events, sizeof(struct kvm_vcpu_events))) | |
3178 | break; | |
3179 | r = 0; | |
3180 | break; | |
3181 | } | |
3182 | case KVM_SET_VCPU_EVENTS: { | |
3183 | struct kvm_vcpu_events events; | |
3184 | ||
3185 | r = -EFAULT; | |
3186 | if (copy_from_user(&events, argp, sizeof(struct kvm_vcpu_events))) | |
3187 | break; | |
3188 | ||
3189 | r = kvm_vcpu_ioctl_x86_set_vcpu_events(vcpu, &events); | |
3190 | break; | |
3191 | } | |
a1efbe77 JK |
3192 | case KVM_GET_DEBUGREGS: { |
3193 | struct kvm_debugregs dbgregs; | |
3194 | ||
3195 | kvm_vcpu_ioctl_x86_get_debugregs(vcpu, &dbgregs); | |
3196 | ||
3197 | r = -EFAULT; | |
3198 | if (copy_to_user(argp, &dbgregs, | |
3199 | sizeof(struct kvm_debugregs))) | |
3200 | break; | |
3201 | r = 0; | |
3202 | break; | |
3203 | } | |
3204 | case KVM_SET_DEBUGREGS: { | |
3205 | struct kvm_debugregs dbgregs; | |
3206 | ||
3207 | r = -EFAULT; | |
3208 | if (copy_from_user(&dbgregs, argp, | |
3209 | sizeof(struct kvm_debugregs))) | |
3210 | break; | |
3211 | ||
3212 | r = kvm_vcpu_ioctl_x86_set_debugregs(vcpu, &dbgregs); | |
3213 | break; | |
3214 | } | |
2d5b5a66 | 3215 | case KVM_GET_XSAVE: { |
d1ac91d8 | 3216 | u.xsave = kzalloc(sizeof(struct kvm_xsave), GFP_KERNEL); |
2d5b5a66 | 3217 | r = -ENOMEM; |
d1ac91d8 | 3218 | if (!u.xsave) |
2d5b5a66 SY |
3219 | break; |
3220 | ||
d1ac91d8 | 3221 | kvm_vcpu_ioctl_x86_get_xsave(vcpu, u.xsave); |
2d5b5a66 SY |
3222 | |
3223 | r = -EFAULT; | |
d1ac91d8 | 3224 | if (copy_to_user(argp, u.xsave, sizeof(struct kvm_xsave))) |
2d5b5a66 SY |
3225 | break; |
3226 | r = 0; | |
3227 | break; | |
3228 | } | |
3229 | case KVM_SET_XSAVE: { | |
d1ac91d8 | 3230 | u.xsave = kzalloc(sizeof(struct kvm_xsave), GFP_KERNEL); |
2d5b5a66 | 3231 | r = -ENOMEM; |
d1ac91d8 | 3232 | if (!u.xsave) |
2d5b5a66 SY |
3233 | break; |
3234 | ||
3235 | r = -EFAULT; | |
d1ac91d8 | 3236 | if (copy_from_user(u.xsave, argp, sizeof(struct kvm_xsave))) |
2d5b5a66 SY |
3237 | break; |
3238 | ||
d1ac91d8 | 3239 | r = kvm_vcpu_ioctl_x86_set_xsave(vcpu, u.xsave); |
2d5b5a66 SY |
3240 | break; |
3241 | } | |
3242 | case KVM_GET_XCRS: { | |
d1ac91d8 | 3243 | u.xcrs = kzalloc(sizeof(struct kvm_xcrs), GFP_KERNEL); |
2d5b5a66 | 3244 | r = -ENOMEM; |
d1ac91d8 | 3245 | if (!u.xcrs) |
2d5b5a66 SY |
3246 | break; |
3247 | ||
d1ac91d8 | 3248 | kvm_vcpu_ioctl_x86_get_xcrs(vcpu, u.xcrs); |
2d5b5a66 SY |
3249 | |
3250 | r = -EFAULT; | |
d1ac91d8 | 3251 | if (copy_to_user(argp, u.xcrs, |
2d5b5a66 SY |
3252 | sizeof(struct kvm_xcrs))) |
3253 | break; | |
3254 | r = 0; | |
3255 | break; | |
3256 | } | |
3257 | case KVM_SET_XCRS: { | |
d1ac91d8 | 3258 | u.xcrs = kzalloc(sizeof(struct kvm_xcrs), GFP_KERNEL); |
2d5b5a66 | 3259 | r = -ENOMEM; |
d1ac91d8 | 3260 | if (!u.xcrs) |
2d5b5a66 SY |
3261 | break; |
3262 | ||
3263 | r = -EFAULT; | |
d1ac91d8 | 3264 | if (copy_from_user(u.xcrs, argp, |
2d5b5a66 SY |
3265 | sizeof(struct kvm_xcrs))) |
3266 | break; | |
3267 | ||
d1ac91d8 | 3268 | r = kvm_vcpu_ioctl_x86_set_xcrs(vcpu, u.xcrs); |
2d5b5a66 SY |
3269 | break; |
3270 | } | |
92a1f12d JR |
3271 | case KVM_SET_TSC_KHZ: { |
3272 | u32 user_tsc_khz; | |
3273 | ||
3274 | r = -EINVAL; | |
3275 | if (!kvm_has_tsc_control) | |
3276 | break; | |
3277 | ||
3278 | user_tsc_khz = (u32)arg; | |
3279 | ||
3280 | if (user_tsc_khz >= kvm_max_guest_tsc_khz) | |
3281 | goto out; | |
3282 | ||
3283 | kvm_x86_ops->set_tsc_khz(vcpu, user_tsc_khz); | |
3284 | ||
3285 | r = 0; | |
3286 | goto out; | |
3287 | } | |
3288 | case KVM_GET_TSC_KHZ: { | |
3289 | r = -EIO; | |
3290 | if (check_tsc_unstable()) | |
3291 | goto out; | |
3292 | ||
3293 | r = vcpu_tsc_khz(vcpu); | |
3294 | ||
3295 | goto out; | |
3296 | } | |
313a3dc7 CO |
3297 | default: |
3298 | r = -EINVAL; | |
3299 | } | |
3300 | out: | |
d1ac91d8 | 3301 | kfree(u.buffer); |
313a3dc7 CO |
3302 | return r; |
3303 | } | |
3304 | ||
1fe779f8 CO |
3305 | static int kvm_vm_ioctl_set_tss_addr(struct kvm *kvm, unsigned long addr) |
3306 | { | |
3307 | int ret; | |
3308 | ||
3309 | if (addr > (unsigned int)(-3 * PAGE_SIZE)) | |
3310 | return -1; | |
3311 | ret = kvm_x86_ops->set_tss_addr(kvm, addr); | |
3312 | return ret; | |
3313 | } | |
3314 | ||
b927a3ce SY |
3315 | static int kvm_vm_ioctl_set_identity_map_addr(struct kvm *kvm, |
3316 | u64 ident_addr) | |
3317 | { | |
3318 | kvm->arch.ept_identity_map_addr = ident_addr; | |
3319 | return 0; | |
3320 | } | |
3321 | ||
1fe779f8 CO |
3322 | static int kvm_vm_ioctl_set_nr_mmu_pages(struct kvm *kvm, |
3323 | u32 kvm_nr_mmu_pages) | |
3324 | { | |
3325 | if (kvm_nr_mmu_pages < KVM_MIN_ALLOC_MMU_PAGES) | |
3326 | return -EINVAL; | |
3327 | ||
79fac95e | 3328 | mutex_lock(&kvm->slots_lock); |
7c8a83b7 | 3329 | spin_lock(&kvm->mmu_lock); |
1fe779f8 CO |
3330 | |
3331 | kvm_mmu_change_mmu_pages(kvm, kvm_nr_mmu_pages); | |
f05e70ac | 3332 | kvm->arch.n_requested_mmu_pages = kvm_nr_mmu_pages; |
1fe779f8 | 3333 | |
7c8a83b7 | 3334 | spin_unlock(&kvm->mmu_lock); |
79fac95e | 3335 | mutex_unlock(&kvm->slots_lock); |
1fe779f8 CO |
3336 | return 0; |
3337 | } | |
3338 | ||
3339 | static int kvm_vm_ioctl_get_nr_mmu_pages(struct kvm *kvm) | |
3340 | { | |
39de71ec | 3341 | return kvm->arch.n_max_mmu_pages; |
1fe779f8 CO |
3342 | } |
3343 | ||
1fe779f8 CO |
3344 | static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) |
3345 | { | |
3346 | int r; | |
3347 | ||
3348 | r = 0; | |
3349 | switch (chip->chip_id) { | |
3350 | case KVM_IRQCHIP_PIC_MASTER: | |
3351 | memcpy(&chip->chip.pic, | |
3352 | &pic_irqchip(kvm)->pics[0], | |
3353 | sizeof(struct kvm_pic_state)); | |
3354 | break; | |
3355 | case KVM_IRQCHIP_PIC_SLAVE: | |
3356 | memcpy(&chip->chip.pic, | |
3357 | &pic_irqchip(kvm)->pics[1], | |
3358 | sizeof(struct kvm_pic_state)); | |
3359 | break; | |
3360 | case KVM_IRQCHIP_IOAPIC: | |
eba0226b | 3361 | r = kvm_get_ioapic(kvm, &chip->chip.ioapic); |
1fe779f8 CO |
3362 | break; |
3363 | default: | |
3364 | r = -EINVAL; | |
3365 | break; | |
3366 | } | |
3367 | return r; | |
3368 | } | |
3369 | ||
3370 | static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) | |
3371 | { | |
3372 | int r; | |
3373 | ||
3374 | r = 0; | |
3375 | switch (chip->chip_id) { | |
3376 | case KVM_IRQCHIP_PIC_MASTER: | |
f4f51050 | 3377 | spin_lock(&pic_irqchip(kvm)->lock); |
1fe779f8 CO |
3378 | memcpy(&pic_irqchip(kvm)->pics[0], |
3379 | &chip->chip.pic, | |
3380 | sizeof(struct kvm_pic_state)); | |
f4f51050 | 3381 | spin_unlock(&pic_irqchip(kvm)->lock); |
1fe779f8 CO |
3382 | break; |
3383 | case KVM_IRQCHIP_PIC_SLAVE: | |
f4f51050 | 3384 | spin_lock(&pic_irqchip(kvm)->lock); |
1fe779f8 CO |
3385 | memcpy(&pic_irqchip(kvm)->pics[1], |
3386 | &chip->chip.pic, | |
3387 | sizeof(struct kvm_pic_state)); | |
f4f51050 | 3388 | spin_unlock(&pic_irqchip(kvm)->lock); |
1fe779f8 CO |
3389 | break; |
3390 | case KVM_IRQCHIP_IOAPIC: | |
eba0226b | 3391 | r = kvm_set_ioapic(kvm, &chip->chip.ioapic); |
1fe779f8 CO |
3392 | break; |
3393 | default: | |
3394 | r = -EINVAL; | |
3395 | break; | |
3396 | } | |
3397 | kvm_pic_update_irq(pic_irqchip(kvm)); | |
3398 | return r; | |
3399 | } | |
3400 | ||
e0f63cb9 SY |
3401 | static int kvm_vm_ioctl_get_pit(struct kvm *kvm, struct kvm_pit_state *ps) |
3402 | { | |
3403 | int r = 0; | |
3404 | ||
894a9c55 | 3405 | mutex_lock(&kvm->arch.vpit->pit_state.lock); |
e0f63cb9 | 3406 | memcpy(ps, &kvm->arch.vpit->pit_state, sizeof(struct kvm_pit_state)); |
894a9c55 | 3407 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); |
e0f63cb9 SY |
3408 | return r; |
3409 | } | |
3410 | ||
3411 | static int kvm_vm_ioctl_set_pit(struct kvm *kvm, struct kvm_pit_state *ps) | |
3412 | { | |
3413 | int r = 0; | |
3414 | ||
894a9c55 | 3415 | mutex_lock(&kvm->arch.vpit->pit_state.lock); |
e0f63cb9 | 3416 | memcpy(&kvm->arch.vpit->pit_state, ps, sizeof(struct kvm_pit_state)); |
e9f42757 BK |
3417 | kvm_pit_load_count(kvm, 0, ps->channels[0].count, 0); |
3418 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); | |
3419 | return r; | |
3420 | } | |
3421 | ||
3422 | static int kvm_vm_ioctl_get_pit2(struct kvm *kvm, struct kvm_pit_state2 *ps) | |
3423 | { | |
3424 | int r = 0; | |
3425 | ||
3426 | mutex_lock(&kvm->arch.vpit->pit_state.lock); | |
3427 | memcpy(ps->channels, &kvm->arch.vpit->pit_state.channels, | |
3428 | sizeof(ps->channels)); | |
3429 | ps->flags = kvm->arch.vpit->pit_state.flags; | |
3430 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); | |
97e69aa6 | 3431 | memset(&ps->reserved, 0, sizeof(ps->reserved)); |
e9f42757 BK |
3432 | return r; |
3433 | } | |
3434 | ||
3435 | static int kvm_vm_ioctl_set_pit2(struct kvm *kvm, struct kvm_pit_state2 *ps) | |
3436 | { | |
3437 | int r = 0, start = 0; | |
3438 | u32 prev_legacy, cur_legacy; | |
3439 | mutex_lock(&kvm->arch.vpit->pit_state.lock); | |
3440 | prev_legacy = kvm->arch.vpit->pit_state.flags & KVM_PIT_FLAGS_HPET_LEGACY; | |
3441 | cur_legacy = ps->flags & KVM_PIT_FLAGS_HPET_LEGACY; | |
3442 | if (!prev_legacy && cur_legacy) | |
3443 | start = 1; | |
3444 | memcpy(&kvm->arch.vpit->pit_state.channels, &ps->channels, | |
3445 | sizeof(kvm->arch.vpit->pit_state.channels)); | |
3446 | kvm->arch.vpit->pit_state.flags = ps->flags; | |
3447 | kvm_pit_load_count(kvm, 0, kvm->arch.vpit->pit_state.channels[0].count, start); | |
894a9c55 | 3448 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); |
e0f63cb9 SY |
3449 | return r; |
3450 | } | |
3451 | ||
52d939a0 MT |
3452 | static int kvm_vm_ioctl_reinject(struct kvm *kvm, |
3453 | struct kvm_reinject_control *control) | |
3454 | { | |
3455 | if (!kvm->arch.vpit) | |
3456 | return -ENXIO; | |
894a9c55 | 3457 | mutex_lock(&kvm->arch.vpit->pit_state.lock); |
52d939a0 | 3458 | kvm->arch.vpit->pit_state.pit_timer.reinject = control->pit_reinject; |
894a9c55 | 3459 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); |
52d939a0 MT |
3460 | return 0; |
3461 | } | |
3462 | ||
95d4c16c TY |
3463 | /** |
3464 | * write_protect_slot - write protect a slot for dirty logging | |
3465 | * @kvm: the kvm instance | |
3466 | * @memslot: the slot we protect | |
3467 | * @dirty_bitmap: the bitmap indicating which pages are dirty | |
3468 | * @nr_dirty_pages: the number of dirty pages | |
3469 | * | |
3470 | * We have two ways to find all sptes to protect: | |
3471 | * 1. Use kvm_mmu_slot_remove_write_access() which walks all shadow pages and | |
3472 | * checks ones that have a spte mapping a page in the slot. | |
3473 | * 2. Use kvm_mmu_rmap_write_protect() for each gfn found in the bitmap. | |
3474 | * | |
3475 | * Generally speaking, if there are not so many dirty pages compared to the | |
3476 | * number of shadow pages, we should use the latter. | |
3477 | * | |
3478 | * Note that letting others write into a page marked dirty in the old bitmap | |
3479 | * by using the remaining tlb entry is not a problem. That page will become | |
3480 | * write protected again when we flush the tlb and then be reported dirty to | |
3481 | * the user space by copying the old bitmap. | |
3482 | */ | |
3483 | static void write_protect_slot(struct kvm *kvm, | |
3484 | struct kvm_memory_slot *memslot, | |
3485 | unsigned long *dirty_bitmap, | |
3486 | unsigned long nr_dirty_pages) | |
3487 | { | |
3488 | /* Not many dirty pages compared to # of shadow pages. */ | |
3489 | if (nr_dirty_pages < kvm->arch.n_used_mmu_pages) { | |
3490 | unsigned long gfn_offset; | |
3491 | ||
3492 | for_each_set_bit(gfn_offset, dirty_bitmap, memslot->npages) { | |
3493 | unsigned long gfn = memslot->base_gfn + gfn_offset; | |
3494 | ||
3495 | spin_lock(&kvm->mmu_lock); | |
3496 | kvm_mmu_rmap_write_protect(kvm, gfn, memslot); | |
3497 | spin_unlock(&kvm->mmu_lock); | |
3498 | } | |
3499 | kvm_flush_remote_tlbs(kvm); | |
3500 | } else { | |
3501 | spin_lock(&kvm->mmu_lock); | |
3502 | kvm_mmu_slot_remove_write_access(kvm, memslot->id); | |
3503 | spin_unlock(&kvm->mmu_lock); | |
3504 | } | |
3505 | } | |
3506 | ||
5bb064dc ZX |
3507 | /* |
3508 | * Get (and clear) the dirty memory log for a memory slot. | |
3509 | */ | |
3510 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, | |
3511 | struct kvm_dirty_log *log) | |
3512 | { | |
7850ac54 | 3513 | int r; |
5bb064dc | 3514 | struct kvm_memory_slot *memslot; |
95d4c16c | 3515 | unsigned long n, nr_dirty_pages; |
5bb064dc | 3516 | |
79fac95e | 3517 | mutex_lock(&kvm->slots_lock); |
5bb064dc | 3518 | |
b050b015 MT |
3519 | r = -EINVAL; |
3520 | if (log->slot >= KVM_MEMORY_SLOTS) | |
3521 | goto out; | |
3522 | ||
3523 | memslot = &kvm->memslots->memslots[log->slot]; | |
3524 | r = -ENOENT; | |
3525 | if (!memslot->dirty_bitmap) | |
3526 | goto out; | |
3527 | ||
87bf6e7d | 3528 | n = kvm_dirty_bitmap_bytes(memslot); |
95d4c16c | 3529 | nr_dirty_pages = memslot->nr_dirty_pages; |
b050b015 | 3530 | |
5bb064dc | 3531 | /* If nothing is dirty, don't bother messing with page tables. */ |
95d4c16c | 3532 | if (nr_dirty_pages) { |
b050b015 | 3533 | struct kvm_memslots *slots, *old_slots; |
914ebccd | 3534 | unsigned long *dirty_bitmap; |
b050b015 | 3535 | |
515a0127 TY |
3536 | dirty_bitmap = memslot->dirty_bitmap_head; |
3537 | if (memslot->dirty_bitmap == dirty_bitmap) | |
3538 | dirty_bitmap += n / sizeof(long); | |
914ebccd | 3539 | memset(dirty_bitmap, 0, n); |
b050b015 | 3540 | |
914ebccd TY |
3541 | r = -ENOMEM; |
3542 | slots = kzalloc(sizeof(struct kvm_memslots), GFP_KERNEL); | |
515a0127 | 3543 | if (!slots) |
914ebccd | 3544 | goto out; |
b050b015 | 3545 | memcpy(slots, kvm->memslots, sizeof(struct kvm_memslots)); |
95d4c16c TY |
3546 | memslot = &slots->memslots[log->slot]; |
3547 | memslot->dirty_bitmap = dirty_bitmap; | |
3548 | memslot->nr_dirty_pages = 0; | |
49c7754c | 3549 | slots->generation++; |
b050b015 MT |
3550 | |
3551 | old_slots = kvm->memslots; | |
3552 | rcu_assign_pointer(kvm->memslots, slots); | |
3553 | synchronize_srcu_expedited(&kvm->srcu); | |
3554 | dirty_bitmap = old_slots->memslots[log->slot].dirty_bitmap; | |
3555 | kfree(old_slots); | |
914ebccd | 3556 | |
95d4c16c | 3557 | write_protect_slot(kvm, memslot, dirty_bitmap, nr_dirty_pages); |
edde99ce | 3558 | |
914ebccd | 3559 | r = -EFAULT; |
515a0127 | 3560 | if (copy_to_user(log->dirty_bitmap, dirty_bitmap, n)) |
914ebccd | 3561 | goto out; |
914ebccd TY |
3562 | } else { |
3563 | r = -EFAULT; | |
3564 | if (clear_user(log->dirty_bitmap, n)) | |
3565 | goto out; | |
5bb064dc | 3566 | } |
b050b015 | 3567 | |
5bb064dc ZX |
3568 | r = 0; |
3569 | out: | |
79fac95e | 3570 | mutex_unlock(&kvm->slots_lock); |
5bb064dc ZX |
3571 | return r; |
3572 | } | |
3573 | ||
1fe779f8 CO |
3574 | long kvm_arch_vm_ioctl(struct file *filp, |
3575 | unsigned int ioctl, unsigned long arg) | |
3576 | { | |
3577 | struct kvm *kvm = filp->private_data; | |
3578 | void __user *argp = (void __user *)arg; | |
367e1319 | 3579 | int r = -ENOTTY; |
f0d66275 DH |
3580 | /* |
3581 | * This union makes it completely explicit to gcc-3.x | |
3582 | * that these two variables' stack usage should be | |
3583 | * combined, not added together. | |
3584 | */ | |
3585 | union { | |
3586 | struct kvm_pit_state ps; | |
e9f42757 | 3587 | struct kvm_pit_state2 ps2; |
c5ff41ce | 3588 | struct kvm_pit_config pit_config; |
f0d66275 | 3589 | } u; |
1fe779f8 CO |
3590 | |
3591 | switch (ioctl) { | |
3592 | case KVM_SET_TSS_ADDR: | |
3593 | r = kvm_vm_ioctl_set_tss_addr(kvm, arg); | |
3594 | if (r < 0) | |
3595 | goto out; | |
3596 | break; | |
b927a3ce SY |
3597 | case KVM_SET_IDENTITY_MAP_ADDR: { |
3598 | u64 ident_addr; | |
3599 | ||
3600 | r = -EFAULT; | |
3601 | if (copy_from_user(&ident_addr, argp, sizeof ident_addr)) | |
3602 | goto out; | |
3603 | r = kvm_vm_ioctl_set_identity_map_addr(kvm, ident_addr); | |
3604 | if (r < 0) | |
3605 | goto out; | |
3606 | break; | |
3607 | } | |
1fe779f8 CO |
3608 | case KVM_SET_NR_MMU_PAGES: |
3609 | r = kvm_vm_ioctl_set_nr_mmu_pages(kvm, arg); | |
3610 | if (r) | |
3611 | goto out; | |
3612 | break; | |
3613 | case KVM_GET_NR_MMU_PAGES: | |
3614 | r = kvm_vm_ioctl_get_nr_mmu_pages(kvm); | |
3615 | break; | |
3ddea128 MT |
3616 | case KVM_CREATE_IRQCHIP: { |
3617 | struct kvm_pic *vpic; | |
3618 | ||
3619 | mutex_lock(&kvm->lock); | |
3620 | r = -EEXIST; | |
3621 | if (kvm->arch.vpic) | |
3622 | goto create_irqchip_unlock; | |
1fe779f8 | 3623 | r = -ENOMEM; |
3ddea128 MT |
3624 | vpic = kvm_create_pic(kvm); |
3625 | if (vpic) { | |
1fe779f8 CO |
3626 | r = kvm_ioapic_init(kvm); |
3627 | if (r) { | |
175504cd | 3628 | mutex_lock(&kvm->slots_lock); |
72bb2fcd | 3629 | kvm_io_bus_unregister_dev(kvm, KVM_PIO_BUS, |
743eeb0b SL |
3630 | &vpic->dev_master); |
3631 | kvm_io_bus_unregister_dev(kvm, KVM_PIO_BUS, | |
3632 | &vpic->dev_slave); | |
3633 | kvm_io_bus_unregister_dev(kvm, KVM_PIO_BUS, | |
3634 | &vpic->dev_eclr); | |
175504cd | 3635 | mutex_unlock(&kvm->slots_lock); |
3ddea128 MT |
3636 | kfree(vpic); |
3637 | goto create_irqchip_unlock; | |
1fe779f8 CO |
3638 | } |
3639 | } else | |
3ddea128 MT |
3640 | goto create_irqchip_unlock; |
3641 | smp_wmb(); | |
3642 | kvm->arch.vpic = vpic; | |
3643 | smp_wmb(); | |
399ec807 AK |
3644 | r = kvm_setup_default_irq_routing(kvm); |
3645 | if (r) { | |
175504cd | 3646 | mutex_lock(&kvm->slots_lock); |
3ddea128 | 3647 | mutex_lock(&kvm->irq_lock); |
72bb2fcd WY |
3648 | kvm_ioapic_destroy(kvm); |
3649 | kvm_destroy_pic(kvm); | |
3ddea128 | 3650 | mutex_unlock(&kvm->irq_lock); |
175504cd | 3651 | mutex_unlock(&kvm->slots_lock); |
399ec807 | 3652 | } |
3ddea128 MT |
3653 | create_irqchip_unlock: |
3654 | mutex_unlock(&kvm->lock); | |
1fe779f8 | 3655 | break; |
3ddea128 | 3656 | } |
7837699f | 3657 | case KVM_CREATE_PIT: |
c5ff41ce JK |
3658 | u.pit_config.flags = KVM_PIT_SPEAKER_DUMMY; |
3659 | goto create_pit; | |
3660 | case KVM_CREATE_PIT2: | |
3661 | r = -EFAULT; | |
3662 | if (copy_from_user(&u.pit_config, argp, | |
3663 | sizeof(struct kvm_pit_config))) | |
3664 | goto out; | |
3665 | create_pit: | |
79fac95e | 3666 | mutex_lock(&kvm->slots_lock); |
269e05e4 AK |
3667 | r = -EEXIST; |
3668 | if (kvm->arch.vpit) | |
3669 | goto create_pit_unlock; | |
7837699f | 3670 | r = -ENOMEM; |
c5ff41ce | 3671 | kvm->arch.vpit = kvm_create_pit(kvm, u.pit_config.flags); |
7837699f SY |
3672 | if (kvm->arch.vpit) |
3673 | r = 0; | |
269e05e4 | 3674 | create_pit_unlock: |
79fac95e | 3675 | mutex_unlock(&kvm->slots_lock); |
7837699f | 3676 | break; |
4925663a | 3677 | case KVM_IRQ_LINE_STATUS: |
1fe779f8 CO |
3678 | case KVM_IRQ_LINE: { |
3679 | struct kvm_irq_level irq_event; | |
3680 | ||
3681 | r = -EFAULT; | |
3682 | if (copy_from_user(&irq_event, argp, sizeof irq_event)) | |
3683 | goto out; | |
160d2f6c | 3684 | r = -ENXIO; |
1fe779f8 | 3685 | if (irqchip_in_kernel(kvm)) { |
4925663a | 3686 | __s32 status; |
4925663a GN |
3687 | status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID, |
3688 | irq_event.irq, irq_event.level); | |
4925663a | 3689 | if (ioctl == KVM_IRQ_LINE_STATUS) { |
160d2f6c | 3690 | r = -EFAULT; |
4925663a GN |
3691 | irq_event.status = status; |
3692 | if (copy_to_user(argp, &irq_event, | |
3693 | sizeof irq_event)) | |
3694 | goto out; | |
3695 | } | |
1fe779f8 CO |
3696 | r = 0; |
3697 | } | |
3698 | break; | |
3699 | } | |
3700 | case KVM_GET_IRQCHIP: { | |
3701 | /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ | |
f0d66275 | 3702 | struct kvm_irqchip *chip = kmalloc(sizeof(*chip), GFP_KERNEL); |
1fe779f8 | 3703 | |
f0d66275 DH |
3704 | r = -ENOMEM; |
3705 | if (!chip) | |
1fe779f8 | 3706 | goto out; |
f0d66275 DH |
3707 | r = -EFAULT; |
3708 | if (copy_from_user(chip, argp, sizeof *chip)) | |
3709 | goto get_irqchip_out; | |
1fe779f8 CO |
3710 | r = -ENXIO; |
3711 | if (!irqchip_in_kernel(kvm)) | |
f0d66275 DH |
3712 | goto get_irqchip_out; |
3713 | r = kvm_vm_ioctl_get_irqchip(kvm, chip); | |
1fe779f8 | 3714 | if (r) |
f0d66275 | 3715 | goto get_irqchip_out; |
1fe779f8 | 3716 | r = -EFAULT; |
f0d66275 DH |
3717 | if (copy_to_user(argp, chip, sizeof *chip)) |
3718 | goto get_irqchip_out; | |
1fe779f8 | 3719 | r = 0; |
f0d66275 DH |
3720 | get_irqchip_out: |
3721 | kfree(chip); | |
3722 | if (r) | |
3723 | goto out; | |
1fe779f8 CO |
3724 | break; |
3725 | } | |
3726 | case KVM_SET_IRQCHIP: { | |
3727 | /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ | |
f0d66275 | 3728 | struct kvm_irqchip *chip = kmalloc(sizeof(*chip), GFP_KERNEL); |
1fe779f8 | 3729 | |
f0d66275 DH |
3730 | r = -ENOMEM; |
3731 | if (!chip) | |
1fe779f8 | 3732 | goto out; |
f0d66275 DH |
3733 | r = -EFAULT; |
3734 | if (copy_from_user(chip, argp, sizeof *chip)) | |
3735 | goto set_irqchip_out; | |
1fe779f8 CO |
3736 | r = -ENXIO; |
3737 | if (!irqchip_in_kernel(kvm)) | |
f0d66275 DH |
3738 | goto set_irqchip_out; |
3739 | r = kvm_vm_ioctl_set_irqchip(kvm, chip); | |
1fe779f8 | 3740 | if (r) |
f0d66275 | 3741 | goto set_irqchip_out; |
1fe779f8 | 3742 | r = 0; |
f0d66275 DH |
3743 | set_irqchip_out: |
3744 | kfree(chip); | |
3745 | if (r) | |
3746 | goto out; | |
1fe779f8 CO |
3747 | break; |
3748 | } | |
e0f63cb9 | 3749 | case KVM_GET_PIT: { |
e0f63cb9 | 3750 | r = -EFAULT; |
f0d66275 | 3751 | if (copy_from_user(&u.ps, argp, sizeof(struct kvm_pit_state))) |
e0f63cb9 SY |
3752 | goto out; |
3753 | r = -ENXIO; | |
3754 | if (!kvm->arch.vpit) | |
3755 | goto out; | |
f0d66275 | 3756 | r = kvm_vm_ioctl_get_pit(kvm, &u.ps); |
e0f63cb9 SY |
3757 | if (r) |
3758 | goto out; | |
3759 | r = -EFAULT; | |
f0d66275 | 3760 | if (copy_to_user(argp, &u.ps, sizeof(struct kvm_pit_state))) |
e0f63cb9 SY |
3761 | goto out; |
3762 | r = 0; | |
3763 | break; | |
3764 | } | |
3765 | case KVM_SET_PIT: { | |
e0f63cb9 | 3766 | r = -EFAULT; |
f0d66275 | 3767 | if (copy_from_user(&u.ps, argp, sizeof u.ps)) |
e0f63cb9 SY |
3768 | goto out; |
3769 | r = -ENXIO; | |
3770 | if (!kvm->arch.vpit) | |
3771 | goto out; | |
f0d66275 | 3772 | r = kvm_vm_ioctl_set_pit(kvm, &u.ps); |
e0f63cb9 SY |
3773 | if (r) |
3774 | goto out; | |
3775 | r = 0; | |
3776 | break; | |
3777 | } | |
e9f42757 BK |
3778 | case KVM_GET_PIT2: { |
3779 | r = -ENXIO; | |
3780 | if (!kvm->arch.vpit) | |
3781 | goto out; | |
3782 | r = kvm_vm_ioctl_get_pit2(kvm, &u.ps2); | |
3783 | if (r) | |
3784 | goto out; | |
3785 | r = -EFAULT; | |
3786 | if (copy_to_user(argp, &u.ps2, sizeof(u.ps2))) | |
3787 | goto out; | |
3788 | r = 0; | |
3789 | break; | |
3790 | } | |
3791 | case KVM_SET_PIT2: { | |
3792 | r = -EFAULT; | |
3793 | if (copy_from_user(&u.ps2, argp, sizeof(u.ps2))) | |
3794 | goto out; | |
3795 | r = -ENXIO; | |
3796 | if (!kvm->arch.vpit) | |
3797 | goto out; | |
3798 | r = kvm_vm_ioctl_set_pit2(kvm, &u.ps2); | |
3799 | if (r) | |
3800 | goto out; | |
3801 | r = 0; | |
3802 | break; | |
3803 | } | |
52d939a0 MT |
3804 | case KVM_REINJECT_CONTROL: { |
3805 | struct kvm_reinject_control control; | |
3806 | r = -EFAULT; | |
3807 | if (copy_from_user(&control, argp, sizeof(control))) | |
3808 | goto out; | |
3809 | r = kvm_vm_ioctl_reinject(kvm, &control); | |
3810 | if (r) | |
3811 | goto out; | |
3812 | r = 0; | |
3813 | break; | |
3814 | } | |
ffde22ac ES |
3815 | case KVM_XEN_HVM_CONFIG: { |
3816 | r = -EFAULT; | |
3817 | if (copy_from_user(&kvm->arch.xen_hvm_config, argp, | |
3818 | sizeof(struct kvm_xen_hvm_config))) | |
3819 | goto out; | |
3820 | r = -EINVAL; | |
3821 | if (kvm->arch.xen_hvm_config.flags) | |
3822 | goto out; | |
3823 | r = 0; | |
3824 | break; | |
3825 | } | |
afbcf7ab | 3826 | case KVM_SET_CLOCK: { |
afbcf7ab GC |
3827 | struct kvm_clock_data user_ns; |
3828 | u64 now_ns; | |
3829 | s64 delta; | |
3830 | ||
3831 | r = -EFAULT; | |
3832 | if (copy_from_user(&user_ns, argp, sizeof(user_ns))) | |
3833 | goto out; | |
3834 | ||
3835 | r = -EINVAL; | |
3836 | if (user_ns.flags) | |
3837 | goto out; | |
3838 | ||
3839 | r = 0; | |
395c6b0a | 3840 | local_irq_disable(); |
759379dd | 3841 | now_ns = get_kernel_ns(); |
afbcf7ab | 3842 | delta = user_ns.clock - now_ns; |
395c6b0a | 3843 | local_irq_enable(); |
afbcf7ab GC |
3844 | kvm->arch.kvmclock_offset = delta; |
3845 | break; | |
3846 | } | |
3847 | case KVM_GET_CLOCK: { | |
afbcf7ab GC |
3848 | struct kvm_clock_data user_ns; |
3849 | u64 now_ns; | |
3850 | ||
395c6b0a | 3851 | local_irq_disable(); |
759379dd | 3852 | now_ns = get_kernel_ns(); |
afbcf7ab | 3853 | user_ns.clock = kvm->arch.kvmclock_offset + now_ns; |
395c6b0a | 3854 | local_irq_enable(); |
afbcf7ab | 3855 | user_ns.flags = 0; |
97e69aa6 | 3856 | memset(&user_ns.pad, 0, sizeof(user_ns.pad)); |
afbcf7ab GC |
3857 | |
3858 | r = -EFAULT; | |
3859 | if (copy_to_user(argp, &user_ns, sizeof(user_ns))) | |
3860 | goto out; | |
3861 | r = 0; | |
3862 | break; | |
3863 | } | |
3864 | ||
1fe779f8 CO |
3865 | default: |
3866 | ; | |
3867 | } | |
3868 | out: | |
3869 | return r; | |
3870 | } | |
3871 | ||
a16b043c | 3872 | static void kvm_init_msr_list(void) |
043405e1 CO |
3873 | { |
3874 | u32 dummy[2]; | |
3875 | unsigned i, j; | |
3876 | ||
e3267cbb GC |
3877 | /* skip the first msrs in the list. KVM-specific */ |
3878 | for (i = j = KVM_SAVE_MSRS_BEGIN; i < ARRAY_SIZE(msrs_to_save); i++) { | |
043405e1 CO |
3879 | if (rdmsr_safe(msrs_to_save[i], &dummy[0], &dummy[1]) < 0) |
3880 | continue; | |
3881 | if (j < i) | |
3882 | msrs_to_save[j] = msrs_to_save[i]; | |
3883 | j++; | |
3884 | } | |
3885 | num_msrs_to_save = j; | |
3886 | } | |
3887 | ||
bda9020e MT |
3888 | static int vcpu_mmio_write(struct kvm_vcpu *vcpu, gpa_t addr, int len, |
3889 | const void *v) | |
bbd9b64e | 3890 | { |
70252a10 AK |
3891 | int handled = 0; |
3892 | int n; | |
3893 | ||
3894 | do { | |
3895 | n = min(len, 8); | |
3896 | if (!(vcpu->arch.apic && | |
3897 | !kvm_iodevice_write(&vcpu->arch.apic->dev, addr, n, v)) | |
3898 | && kvm_io_bus_write(vcpu->kvm, KVM_MMIO_BUS, addr, n, v)) | |
3899 | break; | |
3900 | handled += n; | |
3901 | addr += n; | |
3902 | len -= n; | |
3903 | v += n; | |
3904 | } while (len); | |
bbd9b64e | 3905 | |
70252a10 | 3906 | return handled; |
bbd9b64e CO |
3907 | } |
3908 | ||
bda9020e | 3909 | static int vcpu_mmio_read(struct kvm_vcpu *vcpu, gpa_t addr, int len, void *v) |
bbd9b64e | 3910 | { |
70252a10 AK |
3911 | int handled = 0; |
3912 | int n; | |
3913 | ||
3914 | do { | |
3915 | n = min(len, 8); | |
3916 | if (!(vcpu->arch.apic && | |
3917 | !kvm_iodevice_read(&vcpu->arch.apic->dev, addr, n, v)) | |
3918 | && kvm_io_bus_read(vcpu->kvm, KVM_MMIO_BUS, addr, n, v)) | |
3919 | break; | |
3920 | trace_kvm_mmio(KVM_TRACE_MMIO_READ, n, addr, *(u64 *)v); | |
3921 | handled += n; | |
3922 | addr += n; | |
3923 | len -= n; | |
3924 | v += n; | |
3925 | } while (len); | |
bbd9b64e | 3926 | |
70252a10 | 3927 | return handled; |
bbd9b64e CO |
3928 | } |
3929 | ||
2dafc6c2 GN |
3930 | static void kvm_set_segment(struct kvm_vcpu *vcpu, |
3931 | struct kvm_segment *var, int seg) | |
3932 | { | |
3933 | kvm_x86_ops->set_segment(vcpu, var, seg); | |
3934 | } | |
3935 | ||
3936 | void kvm_get_segment(struct kvm_vcpu *vcpu, | |
3937 | struct kvm_segment *var, int seg) | |
3938 | { | |
3939 | kvm_x86_ops->get_segment(vcpu, var, seg); | |
3940 | } | |
3941 | ||
c30a358d JR |
3942 | static gpa_t translate_gpa(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access) |
3943 | { | |
3944 | return gpa; | |
3945 | } | |
3946 | ||
02f59dc9 JR |
3947 | static gpa_t translate_nested_gpa(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access) |
3948 | { | |
3949 | gpa_t t_gpa; | |
ab9ae313 | 3950 | struct x86_exception exception; |
02f59dc9 JR |
3951 | |
3952 | BUG_ON(!mmu_is_nested(vcpu)); | |
3953 | ||
3954 | /* NPT walks are always user-walks */ | |
3955 | access |= PFERR_USER_MASK; | |
ab9ae313 | 3956 | t_gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, gpa, access, &exception); |
02f59dc9 JR |
3957 | |
3958 | return t_gpa; | |
3959 | } | |
3960 | ||
ab9ae313 AK |
3961 | gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva, |
3962 | struct x86_exception *exception) | |
1871c602 GN |
3963 | { |
3964 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
ab9ae313 | 3965 | return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception); |
1871c602 GN |
3966 | } |
3967 | ||
ab9ae313 AK |
3968 | gpa_t kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu *vcpu, gva_t gva, |
3969 | struct x86_exception *exception) | |
1871c602 GN |
3970 | { |
3971 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
3972 | access |= PFERR_FETCH_MASK; | |
ab9ae313 | 3973 | return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception); |
1871c602 GN |
3974 | } |
3975 | ||
ab9ae313 AK |
3976 | gpa_t kvm_mmu_gva_to_gpa_write(struct kvm_vcpu *vcpu, gva_t gva, |
3977 | struct x86_exception *exception) | |
1871c602 GN |
3978 | { |
3979 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
3980 | access |= PFERR_WRITE_MASK; | |
ab9ae313 | 3981 | return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception); |
1871c602 GN |
3982 | } |
3983 | ||
3984 | /* uses this to access any guest's mapped memory without checking CPL */ | |
ab9ae313 AK |
3985 | gpa_t kvm_mmu_gva_to_gpa_system(struct kvm_vcpu *vcpu, gva_t gva, |
3986 | struct x86_exception *exception) | |
1871c602 | 3987 | { |
ab9ae313 | 3988 | return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, 0, exception); |
1871c602 GN |
3989 | } |
3990 | ||
3991 | static int kvm_read_guest_virt_helper(gva_t addr, void *val, unsigned int bytes, | |
3992 | struct kvm_vcpu *vcpu, u32 access, | |
bcc55cba | 3993 | struct x86_exception *exception) |
bbd9b64e CO |
3994 | { |
3995 | void *data = val; | |
10589a46 | 3996 | int r = X86EMUL_CONTINUE; |
bbd9b64e CO |
3997 | |
3998 | while (bytes) { | |
14dfe855 | 3999 | gpa_t gpa = vcpu->arch.walk_mmu->gva_to_gpa(vcpu, addr, access, |
ab9ae313 | 4000 | exception); |
bbd9b64e | 4001 | unsigned offset = addr & (PAGE_SIZE-1); |
77c2002e | 4002 | unsigned toread = min(bytes, (unsigned)PAGE_SIZE - offset); |
bbd9b64e CO |
4003 | int ret; |
4004 | ||
bcc55cba | 4005 | if (gpa == UNMAPPED_GVA) |
ab9ae313 | 4006 | return X86EMUL_PROPAGATE_FAULT; |
77c2002e | 4007 | ret = kvm_read_guest(vcpu->kvm, gpa, data, toread); |
10589a46 | 4008 | if (ret < 0) { |
c3cd7ffa | 4009 | r = X86EMUL_IO_NEEDED; |
10589a46 MT |
4010 | goto out; |
4011 | } | |
bbd9b64e | 4012 | |
77c2002e IE |
4013 | bytes -= toread; |
4014 | data += toread; | |
4015 | addr += toread; | |
bbd9b64e | 4016 | } |
10589a46 | 4017 | out: |
10589a46 | 4018 | return r; |
bbd9b64e | 4019 | } |
77c2002e | 4020 | |
1871c602 | 4021 | /* used for instruction fetching */ |
0f65dd70 AK |
4022 | static int kvm_fetch_guest_virt(struct x86_emulate_ctxt *ctxt, |
4023 | gva_t addr, void *val, unsigned int bytes, | |
bcc55cba | 4024 | struct x86_exception *exception) |
1871c602 | 4025 | { |
0f65dd70 | 4026 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
1871c602 | 4027 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; |
0f65dd70 | 4028 | |
1871c602 | 4029 | return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, |
bcc55cba AK |
4030 | access | PFERR_FETCH_MASK, |
4031 | exception); | |
1871c602 GN |
4032 | } |
4033 | ||
064aea77 | 4034 | int kvm_read_guest_virt(struct x86_emulate_ctxt *ctxt, |
0f65dd70 | 4035 | gva_t addr, void *val, unsigned int bytes, |
bcc55cba | 4036 | struct x86_exception *exception) |
1871c602 | 4037 | { |
0f65dd70 | 4038 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
1871c602 | 4039 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; |
0f65dd70 | 4040 | |
1871c602 | 4041 | return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, access, |
bcc55cba | 4042 | exception); |
1871c602 | 4043 | } |
064aea77 | 4044 | EXPORT_SYMBOL_GPL(kvm_read_guest_virt); |
1871c602 | 4045 | |
0f65dd70 AK |
4046 | static int kvm_read_guest_virt_system(struct x86_emulate_ctxt *ctxt, |
4047 | gva_t addr, void *val, unsigned int bytes, | |
bcc55cba | 4048 | struct x86_exception *exception) |
1871c602 | 4049 | { |
0f65dd70 | 4050 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
bcc55cba | 4051 | return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, 0, exception); |
1871c602 GN |
4052 | } |
4053 | ||
6a4d7550 | 4054 | int kvm_write_guest_virt_system(struct x86_emulate_ctxt *ctxt, |
0f65dd70 | 4055 | gva_t addr, void *val, |
2dafc6c2 | 4056 | unsigned int bytes, |
bcc55cba | 4057 | struct x86_exception *exception) |
77c2002e | 4058 | { |
0f65dd70 | 4059 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
77c2002e IE |
4060 | void *data = val; |
4061 | int r = X86EMUL_CONTINUE; | |
4062 | ||
4063 | while (bytes) { | |
14dfe855 JR |
4064 | gpa_t gpa = vcpu->arch.walk_mmu->gva_to_gpa(vcpu, addr, |
4065 | PFERR_WRITE_MASK, | |
ab9ae313 | 4066 | exception); |
77c2002e IE |
4067 | unsigned offset = addr & (PAGE_SIZE-1); |
4068 | unsigned towrite = min(bytes, (unsigned)PAGE_SIZE - offset); | |
4069 | int ret; | |
4070 | ||
bcc55cba | 4071 | if (gpa == UNMAPPED_GVA) |
ab9ae313 | 4072 | return X86EMUL_PROPAGATE_FAULT; |
77c2002e IE |
4073 | ret = kvm_write_guest(vcpu->kvm, gpa, data, towrite); |
4074 | if (ret < 0) { | |
c3cd7ffa | 4075 | r = X86EMUL_IO_NEEDED; |
77c2002e IE |
4076 | goto out; |
4077 | } | |
4078 | ||
4079 | bytes -= towrite; | |
4080 | data += towrite; | |
4081 | addr += towrite; | |
4082 | } | |
4083 | out: | |
4084 | return r; | |
4085 | } | |
6a4d7550 | 4086 | EXPORT_SYMBOL_GPL(kvm_write_guest_virt_system); |
77c2002e | 4087 | |
af7cc7d1 XG |
4088 | static int vcpu_mmio_gva_to_gpa(struct kvm_vcpu *vcpu, unsigned long gva, |
4089 | gpa_t *gpa, struct x86_exception *exception, | |
4090 | bool write) | |
4091 | { | |
4092 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
4093 | ||
bebb106a XG |
4094 | if (vcpu_match_mmio_gva(vcpu, gva) && |
4095 | check_write_user_access(vcpu, write, access, | |
4096 | vcpu->arch.access)) { | |
4097 | *gpa = vcpu->arch.mmio_gfn << PAGE_SHIFT | | |
4098 | (gva & (PAGE_SIZE - 1)); | |
4f022648 | 4099 | trace_vcpu_match_mmio(gva, *gpa, write, false); |
bebb106a XG |
4100 | return 1; |
4101 | } | |
4102 | ||
af7cc7d1 XG |
4103 | if (write) |
4104 | access |= PFERR_WRITE_MASK; | |
4105 | ||
4106 | *gpa = vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception); | |
4107 | ||
4108 | if (*gpa == UNMAPPED_GVA) | |
4109 | return -1; | |
4110 | ||
4111 | /* For APIC access vmexit */ | |
4112 | if ((*gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) | |
4113 | return 1; | |
4114 | ||
4f022648 XG |
4115 | if (vcpu_match_mmio_gpa(vcpu, *gpa)) { |
4116 | trace_vcpu_match_mmio(gva, *gpa, write, true); | |
bebb106a | 4117 | return 1; |
4f022648 | 4118 | } |
bebb106a | 4119 | |
af7cc7d1 XG |
4120 | return 0; |
4121 | } | |
4122 | ||
3200f405 | 4123 | int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa, |
bcc55cba | 4124 | const void *val, int bytes) |
bbd9b64e CO |
4125 | { |
4126 | int ret; | |
4127 | ||
4128 | ret = kvm_write_guest(vcpu->kvm, gpa, val, bytes); | |
9f811285 | 4129 | if (ret < 0) |
bbd9b64e | 4130 | return 0; |
f57f2ef5 | 4131 | kvm_mmu_pte_write(vcpu, gpa, val, bytes); |
bbd9b64e CO |
4132 | return 1; |
4133 | } | |
4134 | ||
77d197b2 XG |
4135 | struct read_write_emulator_ops { |
4136 | int (*read_write_prepare)(struct kvm_vcpu *vcpu, void *val, | |
4137 | int bytes); | |
4138 | int (*read_write_emulate)(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4139 | void *val, int bytes); | |
4140 | int (*read_write_mmio)(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4141 | int bytes, void *val); | |
4142 | int (*read_write_exit_mmio)(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4143 | void *val, int bytes); | |
4144 | bool write; | |
4145 | }; | |
4146 | ||
4147 | static int read_prepare(struct kvm_vcpu *vcpu, void *val, int bytes) | |
4148 | { | |
4149 | if (vcpu->mmio_read_completed) { | |
4150 | memcpy(val, vcpu->mmio_data, bytes); | |
4151 | trace_kvm_mmio(KVM_TRACE_MMIO_READ, bytes, | |
4152 | vcpu->mmio_phys_addr, *(u64 *)val); | |
4153 | vcpu->mmio_read_completed = 0; | |
4154 | return 1; | |
4155 | } | |
4156 | ||
4157 | return 0; | |
4158 | } | |
4159 | ||
4160 | static int read_emulate(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4161 | void *val, int bytes) | |
4162 | { | |
4163 | return !kvm_read_guest(vcpu->kvm, gpa, val, bytes); | |
4164 | } | |
4165 | ||
4166 | static int write_emulate(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4167 | void *val, int bytes) | |
4168 | { | |
4169 | return emulator_write_phys(vcpu, gpa, val, bytes); | |
4170 | } | |
4171 | ||
4172 | static int write_mmio(struct kvm_vcpu *vcpu, gpa_t gpa, int bytes, void *val) | |
4173 | { | |
4174 | trace_kvm_mmio(KVM_TRACE_MMIO_WRITE, bytes, gpa, *(u64 *)val); | |
4175 | return vcpu_mmio_write(vcpu, gpa, bytes, val); | |
4176 | } | |
4177 | ||
4178 | static int read_exit_mmio(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4179 | void *val, int bytes) | |
4180 | { | |
4181 | trace_kvm_mmio(KVM_TRACE_MMIO_READ_UNSATISFIED, bytes, gpa, 0); | |
4182 | return X86EMUL_IO_NEEDED; | |
4183 | } | |
4184 | ||
4185 | static int write_exit_mmio(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4186 | void *val, int bytes) | |
4187 | { | |
4188 | memcpy(vcpu->mmio_data, val, bytes); | |
4189 | memcpy(vcpu->run->mmio.data, vcpu->mmio_data, 8); | |
4190 | return X86EMUL_CONTINUE; | |
4191 | } | |
4192 | ||
4193 | static struct read_write_emulator_ops read_emultor = { | |
4194 | .read_write_prepare = read_prepare, | |
4195 | .read_write_emulate = read_emulate, | |
4196 | .read_write_mmio = vcpu_mmio_read, | |
4197 | .read_write_exit_mmio = read_exit_mmio, | |
4198 | }; | |
4199 | ||
4200 | static struct read_write_emulator_ops write_emultor = { | |
4201 | .read_write_emulate = write_emulate, | |
4202 | .read_write_mmio = write_mmio, | |
4203 | .read_write_exit_mmio = write_exit_mmio, | |
4204 | .write = true, | |
4205 | }; | |
4206 | ||
22388a3c XG |
4207 | static int emulator_read_write_onepage(unsigned long addr, void *val, |
4208 | unsigned int bytes, | |
4209 | struct x86_exception *exception, | |
4210 | struct kvm_vcpu *vcpu, | |
4211 | struct read_write_emulator_ops *ops) | |
bbd9b64e | 4212 | { |
af7cc7d1 XG |
4213 | gpa_t gpa; |
4214 | int handled, ret; | |
22388a3c XG |
4215 | bool write = ops->write; |
4216 | ||
4217 | if (ops->read_write_prepare && | |
4218 | ops->read_write_prepare(vcpu, val, bytes)) | |
4219 | return X86EMUL_CONTINUE; | |
10589a46 | 4220 | |
22388a3c | 4221 | ret = vcpu_mmio_gva_to_gpa(vcpu, addr, &gpa, exception, write); |
bbd9b64e | 4222 | |
af7cc7d1 | 4223 | if (ret < 0) |
bbd9b64e | 4224 | return X86EMUL_PROPAGATE_FAULT; |
bbd9b64e CO |
4225 | |
4226 | /* For APIC access vmexit */ | |
af7cc7d1 | 4227 | if (ret) |
bbd9b64e CO |
4228 | goto mmio; |
4229 | ||
22388a3c | 4230 | if (ops->read_write_emulate(vcpu, gpa, val, bytes)) |
bbd9b64e CO |
4231 | return X86EMUL_CONTINUE; |
4232 | ||
4233 | mmio: | |
4234 | /* | |
4235 | * Is this MMIO handled locally? | |
4236 | */ | |
22388a3c | 4237 | handled = ops->read_write_mmio(vcpu, gpa, bytes, val); |
70252a10 | 4238 | if (handled == bytes) |
bbd9b64e | 4239 | return X86EMUL_CONTINUE; |
bbd9b64e | 4240 | |
70252a10 AK |
4241 | gpa += handled; |
4242 | bytes -= handled; | |
4243 | val += handled; | |
4244 | ||
bbd9b64e | 4245 | vcpu->mmio_needed = 1; |
411c35b7 GN |
4246 | vcpu->run->exit_reason = KVM_EXIT_MMIO; |
4247 | vcpu->run->mmio.phys_addr = vcpu->mmio_phys_addr = gpa; | |
cef4dea0 AK |
4248 | vcpu->mmio_size = bytes; |
4249 | vcpu->run->mmio.len = min(vcpu->mmio_size, 8); | |
22388a3c | 4250 | vcpu->run->mmio.is_write = vcpu->mmio_is_write = write; |
cef4dea0 | 4251 | vcpu->mmio_index = 0; |
bbd9b64e | 4252 | |
22388a3c | 4253 | return ops->read_write_exit_mmio(vcpu, gpa, val, bytes); |
bbd9b64e CO |
4254 | } |
4255 | ||
22388a3c XG |
4256 | int emulator_read_write(struct x86_emulate_ctxt *ctxt, unsigned long addr, |
4257 | void *val, unsigned int bytes, | |
4258 | struct x86_exception *exception, | |
4259 | struct read_write_emulator_ops *ops) | |
bbd9b64e | 4260 | { |
0f65dd70 AK |
4261 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
4262 | ||
bbd9b64e CO |
4263 | /* Crossing a page boundary? */ |
4264 | if (((addr + bytes - 1) ^ addr) & PAGE_MASK) { | |
4265 | int rc, now; | |
4266 | ||
4267 | now = -addr & ~PAGE_MASK; | |
22388a3c XG |
4268 | rc = emulator_read_write_onepage(addr, val, now, exception, |
4269 | vcpu, ops); | |
4270 | ||
bbd9b64e CO |
4271 | if (rc != X86EMUL_CONTINUE) |
4272 | return rc; | |
4273 | addr += now; | |
4274 | val += now; | |
4275 | bytes -= now; | |
4276 | } | |
22388a3c XG |
4277 | |
4278 | return emulator_read_write_onepage(addr, val, bytes, exception, | |
4279 | vcpu, ops); | |
4280 | } | |
4281 | ||
4282 | static int emulator_read_emulated(struct x86_emulate_ctxt *ctxt, | |
4283 | unsigned long addr, | |
4284 | void *val, | |
4285 | unsigned int bytes, | |
4286 | struct x86_exception *exception) | |
4287 | { | |
4288 | return emulator_read_write(ctxt, addr, val, bytes, | |
4289 | exception, &read_emultor); | |
4290 | } | |
4291 | ||
4292 | int emulator_write_emulated(struct x86_emulate_ctxt *ctxt, | |
4293 | unsigned long addr, | |
4294 | const void *val, | |
4295 | unsigned int bytes, | |
4296 | struct x86_exception *exception) | |
4297 | { | |
4298 | return emulator_read_write(ctxt, addr, (void *)val, bytes, | |
4299 | exception, &write_emultor); | |
bbd9b64e | 4300 | } |
bbd9b64e | 4301 | |
daea3e73 AK |
4302 | #define CMPXCHG_TYPE(t, ptr, old, new) \ |
4303 | (cmpxchg((t *)(ptr), *(t *)(old), *(t *)(new)) == *(t *)(old)) | |
4304 | ||
4305 | #ifdef CONFIG_X86_64 | |
4306 | # define CMPXCHG64(ptr, old, new) CMPXCHG_TYPE(u64, ptr, old, new) | |
4307 | #else | |
4308 | # define CMPXCHG64(ptr, old, new) \ | |
9749a6c0 | 4309 | (cmpxchg64((u64 *)(ptr), *(u64 *)(old), *(u64 *)(new)) == *(u64 *)(old)) |
daea3e73 AK |
4310 | #endif |
4311 | ||
0f65dd70 AK |
4312 | static int emulator_cmpxchg_emulated(struct x86_emulate_ctxt *ctxt, |
4313 | unsigned long addr, | |
bbd9b64e CO |
4314 | const void *old, |
4315 | const void *new, | |
4316 | unsigned int bytes, | |
0f65dd70 | 4317 | struct x86_exception *exception) |
bbd9b64e | 4318 | { |
0f65dd70 | 4319 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
daea3e73 AK |
4320 | gpa_t gpa; |
4321 | struct page *page; | |
4322 | char *kaddr; | |
4323 | bool exchanged; | |
2bacc55c | 4324 | |
daea3e73 AK |
4325 | /* guests cmpxchg8b have to be emulated atomically */ |
4326 | if (bytes > 8 || (bytes & (bytes - 1))) | |
4327 | goto emul_write; | |
10589a46 | 4328 | |
daea3e73 | 4329 | gpa = kvm_mmu_gva_to_gpa_write(vcpu, addr, NULL); |
2bacc55c | 4330 | |
daea3e73 AK |
4331 | if (gpa == UNMAPPED_GVA || |
4332 | (gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) | |
4333 | goto emul_write; | |
2bacc55c | 4334 | |
daea3e73 AK |
4335 | if (((gpa + bytes - 1) & PAGE_MASK) != (gpa & PAGE_MASK)) |
4336 | goto emul_write; | |
72dc67a6 | 4337 | |
daea3e73 | 4338 | page = gfn_to_page(vcpu->kvm, gpa >> PAGE_SHIFT); |
c19b8bd6 WY |
4339 | if (is_error_page(page)) { |
4340 | kvm_release_page_clean(page); | |
4341 | goto emul_write; | |
4342 | } | |
72dc67a6 | 4343 | |
daea3e73 AK |
4344 | kaddr = kmap_atomic(page, KM_USER0); |
4345 | kaddr += offset_in_page(gpa); | |
4346 | switch (bytes) { | |
4347 | case 1: | |
4348 | exchanged = CMPXCHG_TYPE(u8, kaddr, old, new); | |
4349 | break; | |
4350 | case 2: | |
4351 | exchanged = CMPXCHG_TYPE(u16, kaddr, old, new); | |
4352 | break; | |
4353 | case 4: | |
4354 | exchanged = CMPXCHG_TYPE(u32, kaddr, old, new); | |
4355 | break; | |
4356 | case 8: | |
4357 | exchanged = CMPXCHG64(kaddr, old, new); | |
4358 | break; | |
4359 | default: | |
4360 | BUG(); | |
2bacc55c | 4361 | } |
daea3e73 AK |
4362 | kunmap_atomic(kaddr, KM_USER0); |
4363 | kvm_release_page_dirty(page); | |
4364 | ||
4365 | if (!exchanged) | |
4366 | return X86EMUL_CMPXCHG_FAILED; | |
4367 | ||
f57f2ef5 | 4368 | kvm_mmu_pte_write(vcpu, gpa, new, bytes); |
8f6abd06 GN |
4369 | |
4370 | return X86EMUL_CONTINUE; | |
4a5f48f6 | 4371 | |
3200f405 | 4372 | emul_write: |
daea3e73 | 4373 | printk_once(KERN_WARNING "kvm: emulating exchange as write\n"); |
2bacc55c | 4374 | |
0f65dd70 | 4375 | return emulator_write_emulated(ctxt, addr, new, bytes, exception); |
bbd9b64e CO |
4376 | } |
4377 | ||
cf8f70bf GN |
4378 | static int kernel_pio(struct kvm_vcpu *vcpu, void *pd) |
4379 | { | |
4380 | /* TODO: String I/O for in kernel device */ | |
4381 | int r; | |
4382 | ||
4383 | if (vcpu->arch.pio.in) | |
4384 | r = kvm_io_bus_read(vcpu->kvm, KVM_PIO_BUS, vcpu->arch.pio.port, | |
4385 | vcpu->arch.pio.size, pd); | |
4386 | else | |
4387 | r = kvm_io_bus_write(vcpu->kvm, KVM_PIO_BUS, | |
4388 | vcpu->arch.pio.port, vcpu->arch.pio.size, | |
4389 | pd); | |
4390 | return r; | |
4391 | } | |
4392 | ||
6f6fbe98 XG |
4393 | static int emulator_pio_in_out(struct kvm_vcpu *vcpu, int size, |
4394 | unsigned short port, void *val, | |
4395 | unsigned int count, bool in) | |
cf8f70bf | 4396 | { |
6f6fbe98 | 4397 | trace_kvm_pio(!in, port, size, count); |
cf8f70bf GN |
4398 | |
4399 | vcpu->arch.pio.port = port; | |
6f6fbe98 | 4400 | vcpu->arch.pio.in = in; |
7972995b | 4401 | vcpu->arch.pio.count = count; |
cf8f70bf GN |
4402 | vcpu->arch.pio.size = size; |
4403 | ||
4404 | if (!kernel_pio(vcpu, vcpu->arch.pio_data)) { | |
7972995b | 4405 | vcpu->arch.pio.count = 0; |
cf8f70bf GN |
4406 | return 1; |
4407 | } | |
4408 | ||
4409 | vcpu->run->exit_reason = KVM_EXIT_IO; | |
6f6fbe98 | 4410 | vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT; |
cf8f70bf GN |
4411 | vcpu->run->io.size = size; |
4412 | vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE; | |
4413 | vcpu->run->io.count = count; | |
4414 | vcpu->run->io.port = port; | |
4415 | ||
4416 | return 0; | |
4417 | } | |
4418 | ||
6f6fbe98 XG |
4419 | static int emulator_pio_in_emulated(struct x86_emulate_ctxt *ctxt, |
4420 | int size, unsigned short port, void *val, | |
4421 | unsigned int count) | |
cf8f70bf | 4422 | { |
ca1d4a9e | 4423 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
6f6fbe98 | 4424 | int ret; |
ca1d4a9e | 4425 | |
6f6fbe98 XG |
4426 | if (vcpu->arch.pio.count) |
4427 | goto data_avail; | |
cf8f70bf | 4428 | |
6f6fbe98 XG |
4429 | ret = emulator_pio_in_out(vcpu, size, port, val, count, true); |
4430 | if (ret) { | |
4431 | data_avail: | |
4432 | memcpy(val, vcpu->arch.pio_data, size * count); | |
7972995b | 4433 | vcpu->arch.pio.count = 0; |
cf8f70bf GN |
4434 | return 1; |
4435 | } | |
4436 | ||
cf8f70bf GN |
4437 | return 0; |
4438 | } | |
4439 | ||
6f6fbe98 XG |
4440 | static int emulator_pio_out_emulated(struct x86_emulate_ctxt *ctxt, |
4441 | int size, unsigned short port, | |
4442 | const void *val, unsigned int count) | |
4443 | { | |
4444 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); | |
4445 | ||
4446 | memcpy(vcpu->arch.pio_data, val, size * count); | |
4447 | return emulator_pio_in_out(vcpu, size, port, (void *)val, count, false); | |
4448 | } | |
4449 | ||
bbd9b64e CO |
4450 | static unsigned long get_segment_base(struct kvm_vcpu *vcpu, int seg) |
4451 | { | |
4452 | return kvm_x86_ops->get_segment_base(vcpu, seg); | |
4453 | } | |
4454 | ||
3cb16fe7 | 4455 | static void emulator_invlpg(struct x86_emulate_ctxt *ctxt, ulong address) |
bbd9b64e | 4456 | { |
3cb16fe7 | 4457 | kvm_mmu_invlpg(emul_to_vcpu(ctxt), address); |
bbd9b64e CO |
4458 | } |
4459 | ||
f5f48ee1 SY |
4460 | int kvm_emulate_wbinvd(struct kvm_vcpu *vcpu) |
4461 | { | |
4462 | if (!need_emulate_wbinvd(vcpu)) | |
4463 | return X86EMUL_CONTINUE; | |
4464 | ||
4465 | if (kvm_x86_ops->has_wbinvd_exit()) { | |
2eec7343 JK |
4466 | int cpu = get_cpu(); |
4467 | ||
4468 | cpumask_set_cpu(cpu, vcpu->arch.wbinvd_dirty_mask); | |
f5f48ee1 SY |
4469 | smp_call_function_many(vcpu->arch.wbinvd_dirty_mask, |
4470 | wbinvd_ipi, NULL, 1); | |
2eec7343 | 4471 | put_cpu(); |
f5f48ee1 | 4472 | cpumask_clear(vcpu->arch.wbinvd_dirty_mask); |
2eec7343 JK |
4473 | } else |
4474 | wbinvd(); | |
f5f48ee1 SY |
4475 | return X86EMUL_CONTINUE; |
4476 | } | |
4477 | EXPORT_SYMBOL_GPL(kvm_emulate_wbinvd); | |
4478 | ||
bcaf5cc5 AK |
4479 | static void emulator_wbinvd(struct x86_emulate_ctxt *ctxt) |
4480 | { | |
4481 | kvm_emulate_wbinvd(emul_to_vcpu(ctxt)); | |
4482 | } | |
4483 | ||
717746e3 | 4484 | int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long *dest) |
bbd9b64e | 4485 | { |
717746e3 | 4486 | return _kvm_get_dr(emul_to_vcpu(ctxt), dr, dest); |
bbd9b64e CO |
4487 | } |
4488 | ||
717746e3 | 4489 | int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long value) |
bbd9b64e | 4490 | { |
338dbc97 | 4491 | |
717746e3 | 4492 | return __kvm_set_dr(emul_to_vcpu(ctxt), dr, value); |
bbd9b64e CO |
4493 | } |
4494 | ||
52a46617 | 4495 | static u64 mk_cr_64(u64 curr_cr, u32 new_val) |
5fdbf976 | 4496 | { |
52a46617 | 4497 | return (curr_cr & ~((1ULL << 32) - 1)) | new_val; |
5fdbf976 MT |
4498 | } |
4499 | ||
717746e3 | 4500 | static unsigned long emulator_get_cr(struct x86_emulate_ctxt *ctxt, int cr) |
bbd9b64e | 4501 | { |
717746e3 | 4502 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
52a46617 GN |
4503 | unsigned long value; |
4504 | ||
4505 | switch (cr) { | |
4506 | case 0: | |
4507 | value = kvm_read_cr0(vcpu); | |
4508 | break; | |
4509 | case 2: | |
4510 | value = vcpu->arch.cr2; | |
4511 | break; | |
4512 | case 3: | |
9f8fe504 | 4513 | value = kvm_read_cr3(vcpu); |
52a46617 GN |
4514 | break; |
4515 | case 4: | |
4516 | value = kvm_read_cr4(vcpu); | |
4517 | break; | |
4518 | case 8: | |
4519 | value = kvm_get_cr8(vcpu); | |
4520 | break; | |
4521 | default: | |
4522 | vcpu_printf(vcpu, "%s: unexpected cr %u\n", __func__, cr); | |
4523 | return 0; | |
4524 | } | |
4525 | ||
4526 | return value; | |
4527 | } | |
4528 | ||
717746e3 | 4529 | static int emulator_set_cr(struct x86_emulate_ctxt *ctxt, int cr, ulong val) |
52a46617 | 4530 | { |
717746e3 | 4531 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
0f12244f GN |
4532 | int res = 0; |
4533 | ||
52a46617 GN |
4534 | switch (cr) { |
4535 | case 0: | |
49a9b07e | 4536 | res = kvm_set_cr0(vcpu, mk_cr_64(kvm_read_cr0(vcpu), val)); |
52a46617 GN |
4537 | break; |
4538 | case 2: | |
4539 | vcpu->arch.cr2 = val; | |
4540 | break; | |
4541 | case 3: | |
2390218b | 4542 | res = kvm_set_cr3(vcpu, val); |
52a46617 GN |
4543 | break; |
4544 | case 4: | |
a83b29c6 | 4545 | res = kvm_set_cr4(vcpu, mk_cr_64(kvm_read_cr4(vcpu), val)); |
52a46617 GN |
4546 | break; |
4547 | case 8: | |
eea1cff9 | 4548 | res = kvm_set_cr8(vcpu, val); |
52a46617 GN |
4549 | break; |
4550 | default: | |
4551 | vcpu_printf(vcpu, "%s: unexpected cr %u\n", __func__, cr); | |
0f12244f | 4552 | res = -1; |
52a46617 | 4553 | } |
0f12244f GN |
4554 | |
4555 | return res; | |
52a46617 GN |
4556 | } |
4557 | ||
717746e3 | 4558 | static int emulator_get_cpl(struct x86_emulate_ctxt *ctxt) |
9c537244 | 4559 | { |
717746e3 | 4560 | return kvm_x86_ops->get_cpl(emul_to_vcpu(ctxt)); |
9c537244 GN |
4561 | } |
4562 | ||
4bff1e86 | 4563 | static void emulator_get_gdt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt) |
2dafc6c2 | 4564 | { |
4bff1e86 | 4565 | kvm_x86_ops->get_gdt(emul_to_vcpu(ctxt), dt); |
2dafc6c2 GN |
4566 | } |
4567 | ||
4bff1e86 | 4568 | static void emulator_get_idt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt) |
160ce1f1 | 4569 | { |
4bff1e86 | 4570 | kvm_x86_ops->get_idt(emul_to_vcpu(ctxt), dt); |
160ce1f1 MG |
4571 | } |
4572 | ||
1ac9d0cf AK |
4573 | static void emulator_set_gdt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt) |
4574 | { | |
4575 | kvm_x86_ops->set_gdt(emul_to_vcpu(ctxt), dt); | |
4576 | } | |
4577 | ||
4578 | static void emulator_set_idt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt) | |
4579 | { | |
4580 | kvm_x86_ops->set_idt(emul_to_vcpu(ctxt), dt); | |
4581 | } | |
4582 | ||
4bff1e86 AK |
4583 | static unsigned long emulator_get_cached_segment_base( |
4584 | struct x86_emulate_ctxt *ctxt, int seg) | |
5951c442 | 4585 | { |
4bff1e86 | 4586 | return get_segment_base(emul_to_vcpu(ctxt), seg); |
5951c442 GN |
4587 | } |
4588 | ||
1aa36616 AK |
4589 | static bool emulator_get_segment(struct x86_emulate_ctxt *ctxt, u16 *selector, |
4590 | struct desc_struct *desc, u32 *base3, | |
4591 | int seg) | |
2dafc6c2 GN |
4592 | { |
4593 | struct kvm_segment var; | |
4594 | ||
4bff1e86 | 4595 | kvm_get_segment(emul_to_vcpu(ctxt), &var, seg); |
1aa36616 | 4596 | *selector = var.selector; |
2dafc6c2 GN |
4597 | |
4598 | if (var.unusable) | |
4599 | return false; | |
4600 | ||
4601 | if (var.g) | |
4602 | var.limit >>= 12; | |
4603 | set_desc_limit(desc, var.limit); | |
4604 | set_desc_base(desc, (unsigned long)var.base); | |
5601d05b GN |
4605 | #ifdef CONFIG_X86_64 |
4606 | if (base3) | |
4607 | *base3 = var.base >> 32; | |
4608 | #endif | |
2dafc6c2 GN |
4609 | desc->type = var.type; |
4610 | desc->s = var.s; | |
4611 | desc->dpl = var.dpl; | |
4612 | desc->p = var.present; | |
4613 | desc->avl = var.avl; | |
4614 | desc->l = var.l; | |
4615 | desc->d = var.db; | |
4616 | desc->g = var.g; | |
4617 | ||
4618 | return true; | |
4619 | } | |
4620 | ||
1aa36616 AK |
4621 | static void emulator_set_segment(struct x86_emulate_ctxt *ctxt, u16 selector, |
4622 | struct desc_struct *desc, u32 base3, | |
4623 | int seg) | |
2dafc6c2 | 4624 | { |
4bff1e86 | 4625 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
2dafc6c2 GN |
4626 | struct kvm_segment var; |
4627 | ||
1aa36616 | 4628 | var.selector = selector; |
2dafc6c2 | 4629 | var.base = get_desc_base(desc); |
5601d05b GN |
4630 | #ifdef CONFIG_X86_64 |
4631 | var.base |= ((u64)base3) << 32; | |
4632 | #endif | |
2dafc6c2 GN |
4633 | var.limit = get_desc_limit(desc); |
4634 | if (desc->g) | |
4635 | var.limit = (var.limit << 12) | 0xfff; | |
4636 | var.type = desc->type; | |
4637 | var.present = desc->p; | |
4638 | var.dpl = desc->dpl; | |
4639 | var.db = desc->d; | |
4640 | var.s = desc->s; | |
4641 | var.l = desc->l; | |
4642 | var.g = desc->g; | |
4643 | var.avl = desc->avl; | |
4644 | var.present = desc->p; | |
4645 | var.unusable = !var.present; | |
4646 | var.padding = 0; | |
4647 | ||
4648 | kvm_set_segment(vcpu, &var, seg); | |
4649 | return; | |
4650 | } | |
4651 | ||
717746e3 AK |
4652 | static int emulator_get_msr(struct x86_emulate_ctxt *ctxt, |
4653 | u32 msr_index, u64 *pdata) | |
4654 | { | |
4655 | return kvm_get_msr(emul_to_vcpu(ctxt), msr_index, pdata); | |
4656 | } | |
4657 | ||
4658 | static int emulator_set_msr(struct x86_emulate_ctxt *ctxt, | |
4659 | u32 msr_index, u64 data) | |
4660 | { | |
4661 | return kvm_set_msr(emul_to_vcpu(ctxt), msr_index, data); | |
4662 | } | |
4663 | ||
6c3287f7 AK |
4664 | static void emulator_halt(struct x86_emulate_ctxt *ctxt) |
4665 | { | |
4666 | emul_to_vcpu(ctxt)->arch.halt_request = 1; | |
4667 | } | |
4668 | ||
5037f6f3 AK |
4669 | static void emulator_get_fpu(struct x86_emulate_ctxt *ctxt) |
4670 | { | |
4671 | preempt_disable(); | |
5197b808 | 4672 | kvm_load_guest_fpu(emul_to_vcpu(ctxt)); |
5037f6f3 AK |
4673 | /* |
4674 | * CR0.TS may reference the host fpu state, not the guest fpu state, | |
4675 | * so it may be clear at this point. | |
4676 | */ | |
4677 | clts(); | |
4678 | } | |
4679 | ||
4680 | static void emulator_put_fpu(struct x86_emulate_ctxt *ctxt) | |
4681 | { | |
4682 | preempt_enable(); | |
4683 | } | |
4684 | ||
2953538e | 4685 | static int emulator_intercept(struct x86_emulate_ctxt *ctxt, |
8a76d7f2 | 4686 | struct x86_instruction_info *info, |
c4f035c6 AK |
4687 | enum x86_intercept_stage stage) |
4688 | { | |
2953538e | 4689 | return kvm_x86_ops->check_intercept(emul_to_vcpu(ctxt), info, stage); |
c4f035c6 AK |
4690 | } |
4691 | ||
14af3f3c | 4692 | static struct x86_emulate_ops emulate_ops = { |
1871c602 | 4693 | .read_std = kvm_read_guest_virt_system, |
2dafc6c2 | 4694 | .write_std = kvm_write_guest_virt_system, |
1871c602 | 4695 | .fetch = kvm_fetch_guest_virt, |
bbd9b64e CO |
4696 | .read_emulated = emulator_read_emulated, |
4697 | .write_emulated = emulator_write_emulated, | |
4698 | .cmpxchg_emulated = emulator_cmpxchg_emulated, | |
3cb16fe7 | 4699 | .invlpg = emulator_invlpg, |
cf8f70bf GN |
4700 | .pio_in_emulated = emulator_pio_in_emulated, |
4701 | .pio_out_emulated = emulator_pio_out_emulated, | |
1aa36616 AK |
4702 | .get_segment = emulator_get_segment, |
4703 | .set_segment = emulator_set_segment, | |
5951c442 | 4704 | .get_cached_segment_base = emulator_get_cached_segment_base, |
2dafc6c2 | 4705 | .get_gdt = emulator_get_gdt, |
160ce1f1 | 4706 | .get_idt = emulator_get_idt, |
1ac9d0cf AK |
4707 | .set_gdt = emulator_set_gdt, |
4708 | .set_idt = emulator_set_idt, | |
52a46617 GN |
4709 | .get_cr = emulator_get_cr, |
4710 | .set_cr = emulator_set_cr, | |
9c537244 | 4711 | .cpl = emulator_get_cpl, |
35aa5375 GN |
4712 | .get_dr = emulator_get_dr, |
4713 | .set_dr = emulator_set_dr, | |
717746e3 AK |
4714 | .set_msr = emulator_set_msr, |
4715 | .get_msr = emulator_get_msr, | |
6c3287f7 | 4716 | .halt = emulator_halt, |
bcaf5cc5 | 4717 | .wbinvd = emulator_wbinvd, |
d6aa1000 | 4718 | .fix_hypercall = emulator_fix_hypercall, |
5037f6f3 AK |
4719 | .get_fpu = emulator_get_fpu, |
4720 | .put_fpu = emulator_put_fpu, | |
c4f035c6 | 4721 | .intercept = emulator_intercept, |
bbd9b64e CO |
4722 | }; |
4723 | ||
5fdbf976 MT |
4724 | static void cache_all_regs(struct kvm_vcpu *vcpu) |
4725 | { | |
4726 | kvm_register_read(vcpu, VCPU_REGS_RAX); | |
4727 | kvm_register_read(vcpu, VCPU_REGS_RSP); | |
4728 | kvm_register_read(vcpu, VCPU_REGS_RIP); | |
4729 | vcpu->arch.regs_dirty = ~0; | |
4730 | } | |
4731 | ||
95cb2295 GN |
4732 | static void toggle_interruptibility(struct kvm_vcpu *vcpu, u32 mask) |
4733 | { | |
4734 | u32 int_shadow = kvm_x86_ops->get_interrupt_shadow(vcpu, mask); | |
4735 | /* | |
4736 | * an sti; sti; sequence only disable interrupts for the first | |
4737 | * instruction. So, if the last instruction, be it emulated or | |
4738 | * not, left the system with the INT_STI flag enabled, it | |
4739 | * means that the last instruction is an sti. We should not | |
4740 | * leave the flag on in this case. The same goes for mov ss | |
4741 | */ | |
4742 | if (!(int_shadow & mask)) | |
4743 | kvm_x86_ops->set_interrupt_shadow(vcpu, mask); | |
4744 | } | |
4745 | ||
54b8486f GN |
4746 | static void inject_emulated_exception(struct kvm_vcpu *vcpu) |
4747 | { | |
4748 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; | |
da9cb575 | 4749 | if (ctxt->exception.vector == PF_VECTOR) |
6389ee94 | 4750 | kvm_propagate_fault(vcpu, &ctxt->exception); |
da9cb575 AK |
4751 | else if (ctxt->exception.error_code_valid) |
4752 | kvm_queue_exception_e(vcpu, ctxt->exception.vector, | |
4753 | ctxt->exception.error_code); | |
54b8486f | 4754 | else |
da9cb575 | 4755 | kvm_queue_exception(vcpu, ctxt->exception.vector); |
54b8486f GN |
4756 | } |
4757 | ||
9dac77fa | 4758 | static void init_decode_cache(struct x86_emulate_ctxt *ctxt, |
b5c9ff73 TY |
4759 | const unsigned long *regs) |
4760 | { | |
9dac77fa AK |
4761 | memset(&ctxt->twobyte, 0, |
4762 | (void *)&ctxt->regs - (void *)&ctxt->twobyte); | |
4763 | memcpy(ctxt->regs, regs, sizeof(ctxt->regs)); | |
b5c9ff73 | 4764 | |
9dac77fa AK |
4765 | ctxt->fetch.start = 0; |
4766 | ctxt->fetch.end = 0; | |
4767 | ctxt->io_read.pos = 0; | |
4768 | ctxt->io_read.end = 0; | |
4769 | ctxt->mem_read.pos = 0; | |
4770 | ctxt->mem_read.end = 0; | |
b5c9ff73 TY |
4771 | } |
4772 | ||
8ec4722d MG |
4773 | static void init_emulate_ctxt(struct kvm_vcpu *vcpu) |
4774 | { | |
adf52235 | 4775 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; |
8ec4722d MG |
4776 | int cs_db, cs_l; |
4777 | ||
2aab2c5b GN |
4778 | /* |
4779 | * TODO: fix emulate.c to use guest_read/write_register | |
4780 | * instead of direct ->regs accesses, can save hundred cycles | |
4781 | * on Intel for instructions that don't read/change RSP, for | |
4782 | * for example. | |
4783 | */ | |
8ec4722d MG |
4784 | cache_all_regs(vcpu); |
4785 | ||
4786 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); | |
4787 | ||
adf52235 TY |
4788 | ctxt->eflags = kvm_get_rflags(vcpu); |
4789 | ctxt->eip = kvm_rip_read(vcpu); | |
4790 | ctxt->mode = (!is_protmode(vcpu)) ? X86EMUL_MODE_REAL : | |
4791 | (ctxt->eflags & X86_EFLAGS_VM) ? X86EMUL_MODE_VM86 : | |
4792 | cs_l ? X86EMUL_MODE_PROT64 : | |
4793 | cs_db ? X86EMUL_MODE_PROT32 : | |
4794 | X86EMUL_MODE_PROT16; | |
4795 | ctxt->guest_mode = is_guest_mode(vcpu); | |
4796 | ||
9dac77fa | 4797 | init_decode_cache(ctxt, vcpu->arch.regs); |
7ae441ea | 4798 | vcpu->arch.emulate_regs_need_sync_from_vcpu = false; |
8ec4722d MG |
4799 | } |
4800 | ||
71f9833b | 4801 | int kvm_inject_realmode_interrupt(struct kvm_vcpu *vcpu, int irq, int inc_eip) |
63995653 | 4802 | { |
9d74191a | 4803 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; |
63995653 MG |
4804 | int ret; |
4805 | ||
4806 | init_emulate_ctxt(vcpu); | |
4807 | ||
9dac77fa AK |
4808 | ctxt->op_bytes = 2; |
4809 | ctxt->ad_bytes = 2; | |
4810 | ctxt->_eip = ctxt->eip + inc_eip; | |
9d74191a | 4811 | ret = emulate_int_real(ctxt, irq); |
63995653 MG |
4812 | |
4813 | if (ret != X86EMUL_CONTINUE) | |
4814 | return EMULATE_FAIL; | |
4815 | ||
9dac77fa AK |
4816 | ctxt->eip = ctxt->_eip; |
4817 | memcpy(vcpu->arch.regs, ctxt->regs, sizeof ctxt->regs); | |
9d74191a TY |
4818 | kvm_rip_write(vcpu, ctxt->eip); |
4819 | kvm_set_rflags(vcpu, ctxt->eflags); | |
63995653 MG |
4820 | |
4821 | if (irq == NMI_VECTOR) | |
7460fb4a | 4822 | vcpu->arch.nmi_pending = 0; |
63995653 MG |
4823 | else |
4824 | vcpu->arch.interrupt.pending = false; | |
4825 | ||
4826 | return EMULATE_DONE; | |
4827 | } | |
4828 | EXPORT_SYMBOL_GPL(kvm_inject_realmode_interrupt); | |
4829 | ||
6d77dbfc GN |
4830 | static int handle_emulation_failure(struct kvm_vcpu *vcpu) |
4831 | { | |
fc3a9157 JR |
4832 | int r = EMULATE_DONE; |
4833 | ||
6d77dbfc GN |
4834 | ++vcpu->stat.insn_emulation_fail; |
4835 | trace_kvm_emulate_insn_failed(vcpu); | |
fc3a9157 JR |
4836 | if (!is_guest_mode(vcpu)) { |
4837 | vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR; | |
4838 | vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION; | |
4839 | vcpu->run->internal.ndata = 0; | |
4840 | r = EMULATE_FAIL; | |
4841 | } | |
6d77dbfc | 4842 | kvm_queue_exception(vcpu, UD_VECTOR); |
fc3a9157 JR |
4843 | |
4844 | return r; | |
6d77dbfc GN |
4845 | } |
4846 | ||
a6f177ef GN |
4847 | static bool reexecute_instruction(struct kvm_vcpu *vcpu, gva_t gva) |
4848 | { | |
4849 | gpa_t gpa; | |
4850 | ||
68be0803 GN |
4851 | if (tdp_enabled) |
4852 | return false; | |
4853 | ||
a6f177ef GN |
4854 | /* |
4855 | * if emulation was due to access to shadowed page table | |
4856 | * and it failed try to unshadow page and re-entetr the | |
4857 | * guest to let CPU execute the instruction. | |
4858 | */ | |
4859 | if (kvm_mmu_unprotect_page_virt(vcpu, gva)) | |
4860 | return true; | |
4861 | ||
4862 | gpa = kvm_mmu_gva_to_gpa_system(vcpu, gva, NULL); | |
4863 | ||
4864 | if (gpa == UNMAPPED_GVA) | |
4865 | return true; /* let cpu generate fault */ | |
4866 | ||
4867 | if (!kvm_is_error_hva(gfn_to_hva(vcpu->kvm, gpa >> PAGE_SHIFT))) | |
4868 | return true; | |
4869 | ||
4870 | return false; | |
4871 | } | |
4872 | ||
1cb3f3ae XG |
4873 | static bool retry_instruction(struct x86_emulate_ctxt *ctxt, |
4874 | unsigned long cr2, int emulation_type) | |
4875 | { | |
4876 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); | |
4877 | unsigned long last_retry_eip, last_retry_addr, gpa = cr2; | |
4878 | ||
4879 | last_retry_eip = vcpu->arch.last_retry_eip; | |
4880 | last_retry_addr = vcpu->arch.last_retry_addr; | |
4881 | ||
4882 | /* | |
4883 | * If the emulation is caused by #PF and it is non-page_table | |
4884 | * writing instruction, it means the VM-EXIT is caused by shadow | |
4885 | * page protected, we can zap the shadow page and retry this | |
4886 | * instruction directly. | |
4887 | * | |
4888 | * Note: if the guest uses a non-page-table modifying instruction | |
4889 | * on the PDE that points to the instruction, then we will unmap | |
4890 | * the instruction and go to an infinite loop. So, we cache the | |
4891 | * last retried eip and the last fault address, if we meet the eip | |
4892 | * and the address again, we can break out of the potential infinite | |
4893 | * loop. | |
4894 | */ | |
4895 | vcpu->arch.last_retry_eip = vcpu->arch.last_retry_addr = 0; | |
4896 | ||
4897 | if (!(emulation_type & EMULTYPE_RETRY)) | |
4898 | return false; | |
4899 | ||
4900 | if (x86_page_table_writing_insn(ctxt)) | |
4901 | return false; | |
4902 | ||
4903 | if (ctxt->eip == last_retry_eip && last_retry_addr == cr2) | |
4904 | return false; | |
4905 | ||
4906 | vcpu->arch.last_retry_eip = ctxt->eip; | |
4907 | vcpu->arch.last_retry_addr = cr2; | |
4908 | ||
4909 | if (!vcpu->arch.mmu.direct_map) | |
4910 | gpa = kvm_mmu_gva_to_gpa_write(vcpu, cr2, NULL); | |
4911 | ||
4912 | kvm_mmu_unprotect_page(vcpu->kvm, gpa >> PAGE_SHIFT); | |
4913 | ||
4914 | return true; | |
4915 | } | |
4916 | ||
51d8b661 AP |
4917 | int x86_emulate_instruction(struct kvm_vcpu *vcpu, |
4918 | unsigned long cr2, | |
dc25e89e AP |
4919 | int emulation_type, |
4920 | void *insn, | |
4921 | int insn_len) | |
bbd9b64e | 4922 | { |
95cb2295 | 4923 | int r; |
9d74191a | 4924 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; |
7ae441ea | 4925 | bool writeback = true; |
bbd9b64e | 4926 | |
26eef70c | 4927 | kvm_clear_exception_queue(vcpu); |
8d7d8102 | 4928 | |
571008da | 4929 | if (!(emulation_type & EMULTYPE_NO_DECODE)) { |
8ec4722d | 4930 | init_emulate_ctxt(vcpu); |
9d74191a TY |
4931 | ctxt->interruptibility = 0; |
4932 | ctxt->have_exception = false; | |
4933 | ctxt->perm_ok = false; | |
bbd9b64e | 4934 | |
9d74191a | 4935 | ctxt->only_vendor_specific_insn |
4005996e AK |
4936 | = emulation_type & EMULTYPE_TRAP_UD; |
4937 | ||
9d74191a | 4938 | r = x86_decode_insn(ctxt, insn, insn_len); |
bbd9b64e | 4939 | |
e46479f8 | 4940 | trace_kvm_emulate_insn_start(vcpu); |
f2b5756b | 4941 | ++vcpu->stat.insn_emulation; |
1d2887e2 | 4942 | if (r != EMULATION_OK) { |
4005996e AK |
4943 | if (emulation_type & EMULTYPE_TRAP_UD) |
4944 | return EMULATE_FAIL; | |
a6f177ef | 4945 | if (reexecute_instruction(vcpu, cr2)) |
bbd9b64e | 4946 | return EMULATE_DONE; |
6d77dbfc GN |
4947 | if (emulation_type & EMULTYPE_SKIP) |
4948 | return EMULATE_FAIL; | |
4949 | return handle_emulation_failure(vcpu); | |
bbd9b64e CO |
4950 | } |
4951 | } | |
4952 | ||
ba8afb6b | 4953 | if (emulation_type & EMULTYPE_SKIP) { |
9dac77fa | 4954 | kvm_rip_write(vcpu, ctxt->_eip); |
ba8afb6b GN |
4955 | return EMULATE_DONE; |
4956 | } | |
4957 | ||
1cb3f3ae XG |
4958 | if (retry_instruction(ctxt, cr2, emulation_type)) |
4959 | return EMULATE_DONE; | |
4960 | ||
7ae441ea | 4961 | /* this is needed for vmware backdoor interface to work since it |
4d2179e1 | 4962 | changes registers values during IO operation */ |
7ae441ea GN |
4963 | if (vcpu->arch.emulate_regs_need_sync_from_vcpu) { |
4964 | vcpu->arch.emulate_regs_need_sync_from_vcpu = false; | |
9dac77fa | 4965 | memcpy(ctxt->regs, vcpu->arch.regs, sizeof ctxt->regs); |
7ae441ea | 4966 | } |
4d2179e1 | 4967 | |
5cd21917 | 4968 | restart: |
9d74191a | 4969 | r = x86_emulate_insn(ctxt); |
bbd9b64e | 4970 | |
775fde86 JR |
4971 | if (r == EMULATION_INTERCEPTED) |
4972 | return EMULATE_DONE; | |
4973 | ||
d2ddd1c4 | 4974 | if (r == EMULATION_FAILED) { |
a6f177ef | 4975 | if (reexecute_instruction(vcpu, cr2)) |
c3cd7ffa GN |
4976 | return EMULATE_DONE; |
4977 | ||
6d77dbfc | 4978 | return handle_emulation_failure(vcpu); |
bbd9b64e CO |
4979 | } |
4980 | ||
9d74191a | 4981 | if (ctxt->have_exception) { |
54b8486f | 4982 | inject_emulated_exception(vcpu); |
d2ddd1c4 GN |
4983 | r = EMULATE_DONE; |
4984 | } else if (vcpu->arch.pio.count) { | |
3457e419 GN |
4985 | if (!vcpu->arch.pio.in) |
4986 | vcpu->arch.pio.count = 0; | |
7ae441ea GN |
4987 | else |
4988 | writeback = false; | |
e85d28f8 | 4989 | r = EMULATE_DO_MMIO; |
7ae441ea GN |
4990 | } else if (vcpu->mmio_needed) { |
4991 | if (!vcpu->mmio_is_write) | |
4992 | writeback = false; | |
e85d28f8 | 4993 | r = EMULATE_DO_MMIO; |
7ae441ea | 4994 | } else if (r == EMULATION_RESTART) |
5cd21917 | 4995 | goto restart; |
d2ddd1c4 GN |
4996 | else |
4997 | r = EMULATE_DONE; | |
f850e2e6 | 4998 | |
7ae441ea | 4999 | if (writeback) { |
9d74191a TY |
5000 | toggle_interruptibility(vcpu, ctxt->interruptibility); |
5001 | kvm_set_rflags(vcpu, ctxt->eflags); | |
7ae441ea | 5002 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
9dac77fa | 5003 | memcpy(vcpu->arch.regs, ctxt->regs, sizeof ctxt->regs); |
7ae441ea | 5004 | vcpu->arch.emulate_regs_need_sync_to_vcpu = false; |
9d74191a | 5005 | kvm_rip_write(vcpu, ctxt->eip); |
7ae441ea GN |
5006 | } else |
5007 | vcpu->arch.emulate_regs_need_sync_to_vcpu = true; | |
e85d28f8 GN |
5008 | |
5009 | return r; | |
de7d789a | 5010 | } |
51d8b661 | 5011 | EXPORT_SYMBOL_GPL(x86_emulate_instruction); |
de7d789a | 5012 | |
cf8f70bf | 5013 | int kvm_fast_pio_out(struct kvm_vcpu *vcpu, int size, unsigned short port) |
de7d789a | 5014 | { |
cf8f70bf | 5015 | unsigned long val = kvm_register_read(vcpu, VCPU_REGS_RAX); |
ca1d4a9e AK |
5016 | int ret = emulator_pio_out_emulated(&vcpu->arch.emulate_ctxt, |
5017 | size, port, &val, 1); | |
cf8f70bf | 5018 | /* do not return to emulator after return from userspace */ |
7972995b | 5019 | vcpu->arch.pio.count = 0; |
de7d789a CO |
5020 | return ret; |
5021 | } | |
cf8f70bf | 5022 | EXPORT_SYMBOL_GPL(kvm_fast_pio_out); |
de7d789a | 5023 | |
8cfdc000 ZA |
5024 | static void tsc_bad(void *info) |
5025 | { | |
0a3aee0d | 5026 | __this_cpu_write(cpu_tsc_khz, 0); |
8cfdc000 ZA |
5027 | } |
5028 | ||
5029 | static void tsc_khz_changed(void *data) | |
c8076604 | 5030 | { |
8cfdc000 ZA |
5031 | struct cpufreq_freqs *freq = data; |
5032 | unsigned long khz = 0; | |
5033 | ||
5034 | if (data) | |
5035 | khz = freq->new; | |
5036 | else if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) | |
5037 | khz = cpufreq_quick_get(raw_smp_processor_id()); | |
5038 | if (!khz) | |
5039 | khz = tsc_khz; | |
0a3aee0d | 5040 | __this_cpu_write(cpu_tsc_khz, khz); |
c8076604 GH |
5041 | } |
5042 | ||
c8076604 GH |
5043 | static int kvmclock_cpufreq_notifier(struct notifier_block *nb, unsigned long val, |
5044 | void *data) | |
5045 | { | |
5046 | struct cpufreq_freqs *freq = data; | |
5047 | struct kvm *kvm; | |
5048 | struct kvm_vcpu *vcpu; | |
5049 | int i, send_ipi = 0; | |
5050 | ||
8cfdc000 ZA |
5051 | /* |
5052 | * We allow guests to temporarily run on slowing clocks, | |
5053 | * provided we notify them after, or to run on accelerating | |
5054 | * clocks, provided we notify them before. Thus time never | |
5055 | * goes backwards. | |
5056 | * | |
5057 | * However, we have a problem. We can't atomically update | |
5058 | * the frequency of a given CPU from this function; it is | |
5059 | * merely a notifier, which can be called from any CPU. | |
5060 | * Changing the TSC frequency at arbitrary points in time | |
5061 | * requires a recomputation of local variables related to | |
5062 | * the TSC for each VCPU. We must flag these local variables | |
5063 | * to be updated and be sure the update takes place with the | |
5064 | * new frequency before any guests proceed. | |
5065 | * | |
5066 | * Unfortunately, the combination of hotplug CPU and frequency | |
5067 | * change creates an intractable locking scenario; the order | |
5068 | * of when these callouts happen is undefined with respect to | |
5069 | * CPU hotplug, and they can race with each other. As such, | |
5070 | * merely setting per_cpu(cpu_tsc_khz) = X during a hotadd is | |
5071 | * undefined; you can actually have a CPU frequency change take | |
5072 | * place in between the computation of X and the setting of the | |
5073 | * variable. To protect against this problem, all updates of | |
5074 | * the per_cpu tsc_khz variable are done in an interrupt | |
5075 | * protected IPI, and all callers wishing to update the value | |
5076 | * must wait for a synchronous IPI to complete (which is trivial | |
5077 | * if the caller is on the CPU already). This establishes the | |
5078 | * necessary total order on variable updates. | |
5079 | * | |
5080 | * Note that because a guest time update may take place | |
5081 | * anytime after the setting of the VCPU's request bit, the | |
5082 | * correct TSC value must be set before the request. However, | |
5083 | * to ensure the update actually makes it to any guest which | |
5084 | * starts running in hardware virtualization between the set | |
5085 | * and the acquisition of the spinlock, we must also ping the | |
5086 | * CPU after setting the request bit. | |
5087 | * | |
5088 | */ | |
5089 | ||
c8076604 GH |
5090 | if (val == CPUFREQ_PRECHANGE && freq->old > freq->new) |
5091 | return 0; | |
5092 | if (val == CPUFREQ_POSTCHANGE && freq->old < freq->new) | |
5093 | return 0; | |
8cfdc000 ZA |
5094 | |
5095 | smp_call_function_single(freq->cpu, tsc_khz_changed, freq, 1); | |
c8076604 | 5096 | |
e935b837 | 5097 | raw_spin_lock(&kvm_lock); |
c8076604 | 5098 | list_for_each_entry(kvm, &vm_list, vm_list) { |
988a2cae | 5099 | kvm_for_each_vcpu(i, vcpu, kvm) { |
c8076604 GH |
5100 | if (vcpu->cpu != freq->cpu) |
5101 | continue; | |
c285545f | 5102 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
c8076604 | 5103 | if (vcpu->cpu != smp_processor_id()) |
8cfdc000 | 5104 | send_ipi = 1; |
c8076604 GH |
5105 | } |
5106 | } | |
e935b837 | 5107 | raw_spin_unlock(&kvm_lock); |
c8076604 GH |
5108 | |
5109 | if (freq->old < freq->new && send_ipi) { | |
5110 | /* | |
5111 | * We upscale the frequency. Must make the guest | |
5112 | * doesn't see old kvmclock values while running with | |
5113 | * the new frequency, otherwise we risk the guest sees | |
5114 | * time go backwards. | |
5115 | * | |
5116 | * In case we update the frequency for another cpu | |
5117 | * (which might be in guest context) send an interrupt | |
5118 | * to kick the cpu out of guest context. Next time | |
5119 | * guest context is entered kvmclock will be updated, | |
5120 | * so the guest will not see stale values. | |
5121 | */ | |
8cfdc000 | 5122 | smp_call_function_single(freq->cpu, tsc_khz_changed, freq, 1); |
c8076604 GH |
5123 | } |
5124 | return 0; | |
5125 | } | |
5126 | ||
5127 | static struct notifier_block kvmclock_cpufreq_notifier_block = { | |
8cfdc000 ZA |
5128 | .notifier_call = kvmclock_cpufreq_notifier |
5129 | }; | |
5130 | ||
5131 | static int kvmclock_cpu_notifier(struct notifier_block *nfb, | |
5132 | unsigned long action, void *hcpu) | |
5133 | { | |
5134 | unsigned int cpu = (unsigned long)hcpu; | |
5135 | ||
5136 | switch (action) { | |
5137 | case CPU_ONLINE: | |
5138 | case CPU_DOWN_FAILED: | |
5139 | smp_call_function_single(cpu, tsc_khz_changed, NULL, 1); | |
5140 | break; | |
5141 | case CPU_DOWN_PREPARE: | |
5142 | smp_call_function_single(cpu, tsc_bad, NULL, 1); | |
5143 | break; | |
5144 | } | |
5145 | return NOTIFY_OK; | |
5146 | } | |
5147 | ||
5148 | static struct notifier_block kvmclock_cpu_notifier_block = { | |
5149 | .notifier_call = kvmclock_cpu_notifier, | |
5150 | .priority = -INT_MAX | |
c8076604 GH |
5151 | }; |
5152 | ||
b820cc0c ZA |
5153 | static void kvm_timer_init(void) |
5154 | { | |
5155 | int cpu; | |
5156 | ||
c285545f | 5157 | max_tsc_khz = tsc_khz; |
8cfdc000 | 5158 | register_hotcpu_notifier(&kvmclock_cpu_notifier_block); |
b820cc0c | 5159 | if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) { |
c285545f ZA |
5160 | #ifdef CONFIG_CPU_FREQ |
5161 | struct cpufreq_policy policy; | |
5162 | memset(&policy, 0, sizeof(policy)); | |
3e26f230 AK |
5163 | cpu = get_cpu(); |
5164 | cpufreq_get_policy(&policy, cpu); | |
c285545f ZA |
5165 | if (policy.cpuinfo.max_freq) |
5166 | max_tsc_khz = policy.cpuinfo.max_freq; | |
3e26f230 | 5167 | put_cpu(); |
c285545f | 5168 | #endif |
b820cc0c ZA |
5169 | cpufreq_register_notifier(&kvmclock_cpufreq_notifier_block, |
5170 | CPUFREQ_TRANSITION_NOTIFIER); | |
5171 | } | |
c285545f | 5172 | pr_debug("kvm: max_tsc_khz = %ld\n", max_tsc_khz); |
8cfdc000 ZA |
5173 | for_each_online_cpu(cpu) |
5174 | smp_call_function_single(cpu, tsc_khz_changed, NULL, 1); | |
b820cc0c ZA |
5175 | } |
5176 | ||
ff9d07a0 ZY |
5177 | static DEFINE_PER_CPU(struct kvm_vcpu *, current_vcpu); |
5178 | ||
5179 | static int kvm_is_in_guest(void) | |
5180 | { | |
5181 | return percpu_read(current_vcpu) != NULL; | |
5182 | } | |
5183 | ||
5184 | static int kvm_is_user_mode(void) | |
5185 | { | |
5186 | int user_mode = 3; | |
dcf46b94 | 5187 | |
ff9d07a0 ZY |
5188 | if (percpu_read(current_vcpu)) |
5189 | user_mode = kvm_x86_ops->get_cpl(percpu_read(current_vcpu)); | |
dcf46b94 | 5190 | |
ff9d07a0 ZY |
5191 | return user_mode != 0; |
5192 | } | |
5193 | ||
5194 | static unsigned long kvm_get_guest_ip(void) | |
5195 | { | |
5196 | unsigned long ip = 0; | |
dcf46b94 | 5197 | |
ff9d07a0 ZY |
5198 | if (percpu_read(current_vcpu)) |
5199 | ip = kvm_rip_read(percpu_read(current_vcpu)); | |
dcf46b94 | 5200 | |
ff9d07a0 ZY |
5201 | return ip; |
5202 | } | |
5203 | ||
5204 | static struct perf_guest_info_callbacks kvm_guest_cbs = { | |
5205 | .is_in_guest = kvm_is_in_guest, | |
5206 | .is_user_mode = kvm_is_user_mode, | |
5207 | .get_guest_ip = kvm_get_guest_ip, | |
5208 | }; | |
5209 | ||
5210 | void kvm_before_handle_nmi(struct kvm_vcpu *vcpu) | |
5211 | { | |
5212 | percpu_write(current_vcpu, vcpu); | |
5213 | } | |
5214 | EXPORT_SYMBOL_GPL(kvm_before_handle_nmi); | |
5215 | ||
5216 | void kvm_after_handle_nmi(struct kvm_vcpu *vcpu) | |
5217 | { | |
5218 | percpu_write(current_vcpu, NULL); | |
5219 | } | |
5220 | EXPORT_SYMBOL_GPL(kvm_after_handle_nmi); | |
5221 | ||
ce88decf XG |
5222 | static void kvm_set_mmio_spte_mask(void) |
5223 | { | |
5224 | u64 mask; | |
5225 | int maxphyaddr = boot_cpu_data.x86_phys_bits; | |
5226 | ||
5227 | /* | |
5228 | * Set the reserved bits and the present bit of an paging-structure | |
5229 | * entry to generate page fault with PFER.RSV = 1. | |
5230 | */ | |
5231 | mask = ((1ull << (62 - maxphyaddr + 1)) - 1) << maxphyaddr; | |
5232 | mask |= 1ull; | |
5233 | ||
5234 | #ifdef CONFIG_X86_64 | |
5235 | /* | |
5236 | * If reserved bit is not supported, clear the present bit to disable | |
5237 | * mmio page fault. | |
5238 | */ | |
5239 | if (maxphyaddr == 52) | |
5240 | mask &= ~1ull; | |
5241 | #endif | |
5242 | ||
5243 | kvm_mmu_set_mmio_spte_mask(mask); | |
5244 | } | |
5245 | ||
f8c16bba | 5246 | int kvm_arch_init(void *opaque) |
043405e1 | 5247 | { |
b820cc0c | 5248 | int r; |
f8c16bba ZX |
5249 | struct kvm_x86_ops *ops = (struct kvm_x86_ops *)opaque; |
5250 | ||
f8c16bba ZX |
5251 | if (kvm_x86_ops) { |
5252 | printk(KERN_ERR "kvm: already loaded the other module\n"); | |
56c6d28a ZX |
5253 | r = -EEXIST; |
5254 | goto out; | |
f8c16bba ZX |
5255 | } |
5256 | ||
5257 | if (!ops->cpu_has_kvm_support()) { | |
5258 | printk(KERN_ERR "kvm: no hardware support\n"); | |
56c6d28a ZX |
5259 | r = -EOPNOTSUPP; |
5260 | goto out; | |
f8c16bba ZX |
5261 | } |
5262 | if (ops->disabled_by_bios()) { | |
5263 | printk(KERN_ERR "kvm: disabled by bios\n"); | |
56c6d28a ZX |
5264 | r = -EOPNOTSUPP; |
5265 | goto out; | |
f8c16bba ZX |
5266 | } |
5267 | ||
97db56ce AK |
5268 | r = kvm_mmu_module_init(); |
5269 | if (r) | |
5270 | goto out; | |
5271 | ||
ce88decf | 5272 | kvm_set_mmio_spte_mask(); |
97db56ce AK |
5273 | kvm_init_msr_list(); |
5274 | ||
f8c16bba | 5275 | kvm_x86_ops = ops; |
7b52345e | 5276 | kvm_mmu_set_mask_ptes(PT_USER_MASK, PT_ACCESSED_MASK, |
4b12f0de | 5277 | PT_DIRTY_MASK, PT64_NX_MASK, 0); |
c8076604 | 5278 | |
b820cc0c | 5279 | kvm_timer_init(); |
c8076604 | 5280 | |
ff9d07a0 ZY |
5281 | perf_register_guest_info_callbacks(&kvm_guest_cbs); |
5282 | ||
2acf923e DC |
5283 | if (cpu_has_xsave) |
5284 | host_xcr0 = xgetbv(XCR_XFEATURE_ENABLED_MASK); | |
5285 | ||
f8c16bba | 5286 | return 0; |
56c6d28a ZX |
5287 | |
5288 | out: | |
56c6d28a | 5289 | return r; |
043405e1 | 5290 | } |
8776e519 | 5291 | |
f8c16bba ZX |
5292 | void kvm_arch_exit(void) |
5293 | { | |
ff9d07a0 ZY |
5294 | perf_unregister_guest_info_callbacks(&kvm_guest_cbs); |
5295 | ||
888d256e JK |
5296 | if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) |
5297 | cpufreq_unregister_notifier(&kvmclock_cpufreq_notifier_block, | |
5298 | CPUFREQ_TRANSITION_NOTIFIER); | |
8cfdc000 | 5299 | unregister_hotcpu_notifier(&kvmclock_cpu_notifier_block); |
f8c16bba | 5300 | kvm_x86_ops = NULL; |
56c6d28a ZX |
5301 | kvm_mmu_module_exit(); |
5302 | } | |
f8c16bba | 5303 | |
8776e519 HB |
5304 | int kvm_emulate_halt(struct kvm_vcpu *vcpu) |
5305 | { | |
5306 | ++vcpu->stat.halt_exits; | |
5307 | if (irqchip_in_kernel(vcpu->kvm)) { | |
a4535290 | 5308 | vcpu->arch.mp_state = KVM_MP_STATE_HALTED; |
8776e519 HB |
5309 | return 1; |
5310 | } else { | |
5311 | vcpu->run->exit_reason = KVM_EXIT_HLT; | |
5312 | return 0; | |
5313 | } | |
5314 | } | |
5315 | EXPORT_SYMBOL_GPL(kvm_emulate_halt); | |
5316 | ||
55cd8e5a GN |
5317 | int kvm_hv_hypercall(struct kvm_vcpu *vcpu) |
5318 | { | |
5319 | u64 param, ingpa, outgpa, ret; | |
5320 | uint16_t code, rep_idx, rep_cnt, res = HV_STATUS_SUCCESS, rep_done = 0; | |
5321 | bool fast, longmode; | |
5322 | int cs_db, cs_l; | |
5323 | ||
5324 | /* | |
5325 | * hypercall generates UD from non zero cpl and real mode | |
5326 | * per HYPER-V spec | |
5327 | */ | |
3eeb3288 | 5328 | if (kvm_x86_ops->get_cpl(vcpu) != 0 || !is_protmode(vcpu)) { |
55cd8e5a GN |
5329 | kvm_queue_exception(vcpu, UD_VECTOR); |
5330 | return 0; | |
5331 | } | |
5332 | ||
5333 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); | |
5334 | longmode = is_long_mode(vcpu) && cs_l == 1; | |
5335 | ||
5336 | if (!longmode) { | |
ccd46936 GN |
5337 | param = ((u64)kvm_register_read(vcpu, VCPU_REGS_RDX) << 32) | |
5338 | (kvm_register_read(vcpu, VCPU_REGS_RAX) & 0xffffffff); | |
5339 | ingpa = ((u64)kvm_register_read(vcpu, VCPU_REGS_RBX) << 32) | | |
5340 | (kvm_register_read(vcpu, VCPU_REGS_RCX) & 0xffffffff); | |
5341 | outgpa = ((u64)kvm_register_read(vcpu, VCPU_REGS_RDI) << 32) | | |
5342 | (kvm_register_read(vcpu, VCPU_REGS_RSI) & 0xffffffff); | |
55cd8e5a GN |
5343 | } |
5344 | #ifdef CONFIG_X86_64 | |
5345 | else { | |
5346 | param = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
5347 | ingpa = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
5348 | outgpa = kvm_register_read(vcpu, VCPU_REGS_R8); | |
5349 | } | |
5350 | #endif | |
5351 | ||
5352 | code = param & 0xffff; | |
5353 | fast = (param >> 16) & 0x1; | |
5354 | rep_cnt = (param >> 32) & 0xfff; | |
5355 | rep_idx = (param >> 48) & 0xfff; | |
5356 | ||
5357 | trace_kvm_hv_hypercall(code, fast, rep_cnt, rep_idx, ingpa, outgpa); | |
5358 | ||
c25bc163 GN |
5359 | switch (code) { |
5360 | case HV_X64_HV_NOTIFY_LONG_SPIN_WAIT: | |
5361 | kvm_vcpu_on_spin(vcpu); | |
5362 | break; | |
5363 | default: | |
5364 | res = HV_STATUS_INVALID_HYPERCALL_CODE; | |
5365 | break; | |
5366 | } | |
55cd8e5a GN |
5367 | |
5368 | ret = res | (((u64)rep_done & 0xfff) << 32); | |
5369 | if (longmode) { | |
5370 | kvm_register_write(vcpu, VCPU_REGS_RAX, ret); | |
5371 | } else { | |
5372 | kvm_register_write(vcpu, VCPU_REGS_RDX, ret >> 32); | |
5373 | kvm_register_write(vcpu, VCPU_REGS_RAX, ret & 0xffffffff); | |
5374 | } | |
5375 | ||
5376 | return 1; | |
5377 | } | |
5378 | ||
8776e519 HB |
5379 | int kvm_emulate_hypercall(struct kvm_vcpu *vcpu) |
5380 | { | |
5381 | unsigned long nr, a0, a1, a2, a3, ret; | |
2f333bcb | 5382 | int r = 1; |
8776e519 | 5383 | |
55cd8e5a GN |
5384 | if (kvm_hv_hypercall_enabled(vcpu->kvm)) |
5385 | return kvm_hv_hypercall(vcpu); | |
5386 | ||
5fdbf976 MT |
5387 | nr = kvm_register_read(vcpu, VCPU_REGS_RAX); |
5388 | a0 = kvm_register_read(vcpu, VCPU_REGS_RBX); | |
5389 | a1 = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
5390 | a2 = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
5391 | a3 = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
8776e519 | 5392 | |
229456fc | 5393 | trace_kvm_hypercall(nr, a0, a1, a2, a3); |
2714d1d3 | 5394 | |
8776e519 HB |
5395 | if (!is_long_mode(vcpu)) { |
5396 | nr &= 0xFFFFFFFF; | |
5397 | a0 &= 0xFFFFFFFF; | |
5398 | a1 &= 0xFFFFFFFF; | |
5399 | a2 &= 0xFFFFFFFF; | |
5400 | a3 &= 0xFFFFFFFF; | |
5401 | } | |
5402 | ||
07708c4a JK |
5403 | if (kvm_x86_ops->get_cpl(vcpu) != 0) { |
5404 | ret = -KVM_EPERM; | |
5405 | goto out; | |
5406 | } | |
5407 | ||
8776e519 | 5408 | switch (nr) { |
b93463aa AK |
5409 | case KVM_HC_VAPIC_POLL_IRQ: |
5410 | ret = 0; | |
5411 | break; | |
8776e519 HB |
5412 | default: |
5413 | ret = -KVM_ENOSYS; | |
5414 | break; | |
5415 | } | |
07708c4a | 5416 | out: |
5fdbf976 | 5417 | kvm_register_write(vcpu, VCPU_REGS_RAX, ret); |
f11c3a8d | 5418 | ++vcpu->stat.hypercalls; |
2f333bcb | 5419 | return r; |
8776e519 HB |
5420 | } |
5421 | EXPORT_SYMBOL_GPL(kvm_emulate_hypercall); | |
5422 | ||
d6aa1000 | 5423 | int emulator_fix_hypercall(struct x86_emulate_ctxt *ctxt) |
8776e519 | 5424 | { |
d6aa1000 | 5425 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
8776e519 | 5426 | char instruction[3]; |
5fdbf976 | 5427 | unsigned long rip = kvm_rip_read(vcpu); |
8776e519 | 5428 | |
8776e519 HB |
5429 | /* |
5430 | * Blow out the MMU to ensure that no other VCPU has an active mapping | |
5431 | * to ensure that the updated hypercall appears atomically across all | |
5432 | * VCPUs. | |
5433 | */ | |
5434 | kvm_mmu_zap_all(vcpu->kvm); | |
5435 | ||
8776e519 | 5436 | kvm_x86_ops->patch_hypercall(vcpu, instruction); |
8776e519 | 5437 | |
9d74191a | 5438 | return emulator_write_emulated(ctxt, rip, instruction, 3, NULL); |
8776e519 HB |
5439 | } |
5440 | ||
07716717 DK |
5441 | static int move_to_next_stateful_cpuid_entry(struct kvm_vcpu *vcpu, int i) |
5442 | { | |
ad312c7c ZX |
5443 | struct kvm_cpuid_entry2 *e = &vcpu->arch.cpuid_entries[i]; |
5444 | int j, nent = vcpu->arch.cpuid_nent; | |
07716717 DK |
5445 | |
5446 | e->flags &= ~KVM_CPUID_FLAG_STATE_READ_NEXT; | |
5447 | /* when no next entry is found, the current entry[i] is reselected */ | |
0fdf8e59 | 5448 | for (j = i + 1; ; j = (j + 1) % nent) { |
ad312c7c | 5449 | struct kvm_cpuid_entry2 *ej = &vcpu->arch.cpuid_entries[j]; |
07716717 DK |
5450 | if (ej->function == e->function) { |
5451 | ej->flags |= KVM_CPUID_FLAG_STATE_READ_NEXT; | |
5452 | return j; | |
5453 | } | |
5454 | } | |
5455 | return 0; /* silence gcc, even though control never reaches here */ | |
5456 | } | |
5457 | ||
5458 | /* find an entry with matching function, matching index (if needed), and that | |
5459 | * should be read next (if it's stateful) */ | |
5460 | static int is_matching_cpuid_entry(struct kvm_cpuid_entry2 *e, | |
5461 | u32 function, u32 index) | |
5462 | { | |
5463 | if (e->function != function) | |
5464 | return 0; | |
5465 | if ((e->flags & KVM_CPUID_FLAG_SIGNIFCANT_INDEX) && e->index != index) | |
5466 | return 0; | |
5467 | if ((e->flags & KVM_CPUID_FLAG_STATEFUL_FUNC) && | |
19355475 | 5468 | !(e->flags & KVM_CPUID_FLAG_STATE_READ_NEXT)) |
07716717 DK |
5469 | return 0; |
5470 | return 1; | |
5471 | } | |
5472 | ||
d8017474 AG |
5473 | struct kvm_cpuid_entry2 *kvm_find_cpuid_entry(struct kvm_vcpu *vcpu, |
5474 | u32 function, u32 index) | |
8776e519 HB |
5475 | { |
5476 | int i; | |
d8017474 | 5477 | struct kvm_cpuid_entry2 *best = NULL; |
8776e519 | 5478 | |
ad312c7c | 5479 | for (i = 0; i < vcpu->arch.cpuid_nent; ++i) { |
d8017474 AG |
5480 | struct kvm_cpuid_entry2 *e; |
5481 | ||
ad312c7c | 5482 | e = &vcpu->arch.cpuid_entries[i]; |
07716717 DK |
5483 | if (is_matching_cpuid_entry(e, function, index)) { |
5484 | if (e->flags & KVM_CPUID_FLAG_STATEFUL_FUNC) | |
5485 | move_to_next_stateful_cpuid_entry(vcpu, i); | |
8776e519 HB |
5486 | best = e; |
5487 | break; | |
5488 | } | |
8776e519 | 5489 | } |
d8017474 AG |
5490 | return best; |
5491 | } | |
0e851880 | 5492 | EXPORT_SYMBOL_GPL(kvm_find_cpuid_entry); |
d8017474 | 5493 | |
82725b20 DE |
5494 | int cpuid_maxphyaddr(struct kvm_vcpu *vcpu) |
5495 | { | |
5496 | struct kvm_cpuid_entry2 *best; | |
5497 | ||
f7a71197 AK |
5498 | best = kvm_find_cpuid_entry(vcpu, 0x80000000, 0); |
5499 | if (!best || best->eax < 0x80000008) | |
5500 | goto not_found; | |
82725b20 DE |
5501 | best = kvm_find_cpuid_entry(vcpu, 0x80000008, 0); |
5502 | if (best) | |
5503 | return best->eax & 0xff; | |
f7a71197 | 5504 | not_found: |
82725b20 DE |
5505 | return 36; |
5506 | } | |
5507 | ||
bd22f5cf AP |
5508 | /* |
5509 | * If no match is found, check whether we exceed the vCPU's limit | |
5510 | * and return the content of the highest valid _standard_ leaf instead. | |
5511 | * This is to satisfy the CPUID specification. | |
5512 | */ | |
5513 | static struct kvm_cpuid_entry2* check_cpuid_limit(struct kvm_vcpu *vcpu, | |
5514 | u32 function, u32 index) | |
5515 | { | |
5516 | struct kvm_cpuid_entry2 *maxlevel; | |
5517 | ||
5518 | maxlevel = kvm_find_cpuid_entry(vcpu, function & 0x80000000, 0); | |
5519 | if (!maxlevel || maxlevel->eax >= function) | |
5520 | return NULL; | |
5521 | if (function & 0x80000000) { | |
5522 | maxlevel = kvm_find_cpuid_entry(vcpu, 0, 0); | |
5523 | if (!maxlevel) | |
5524 | return NULL; | |
5525 | } | |
5526 | return kvm_find_cpuid_entry(vcpu, maxlevel->eax, index); | |
5527 | } | |
5528 | ||
d8017474 AG |
5529 | void kvm_emulate_cpuid(struct kvm_vcpu *vcpu) |
5530 | { | |
5531 | u32 function, index; | |
5532 | struct kvm_cpuid_entry2 *best; | |
5533 | ||
5534 | function = kvm_register_read(vcpu, VCPU_REGS_RAX); | |
5535 | index = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
5536 | kvm_register_write(vcpu, VCPU_REGS_RAX, 0); | |
5537 | kvm_register_write(vcpu, VCPU_REGS_RBX, 0); | |
5538 | kvm_register_write(vcpu, VCPU_REGS_RCX, 0); | |
5539 | kvm_register_write(vcpu, VCPU_REGS_RDX, 0); | |
5540 | best = kvm_find_cpuid_entry(vcpu, function, index); | |
bd22f5cf AP |
5541 | |
5542 | if (!best) | |
5543 | best = check_cpuid_limit(vcpu, function, index); | |
5544 | ||
8776e519 | 5545 | if (best) { |
5fdbf976 MT |
5546 | kvm_register_write(vcpu, VCPU_REGS_RAX, best->eax); |
5547 | kvm_register_write(vcpu, VCPU_REGS_RBX, best->ebx); | |
5548 | kvm_register_write(vcpu, VCPU_REGS_RCX, best->ecx); | |
5549 | kvm_register_write(vcpu, VCPU_REGS_RDX, best->edx); | |
8776e519 | 5550 | } |
8776e519 | 5551 | kvm_x86_ops->skip_emulated_instruction(vcpu); |
229456fc MT |
5552 | trace_kvm_cpuid(function, |
5553 | kvm_register_read(vcpu, VCPU_REGS_RAX), | |
5554 | kvm_register_read(vcpu, VCPU_REGS_RBX), | |
5555 | kvm_register_read(vcpu, VCPU_REGS_RCX), | |
5556 | kvm_register_read(vcpu, VCPU_REGS_RDX)); | |
8776e519 HB |
5557 | } |
5558 | EXPORT_SYMBOL_GPL(kvm_emulate_cpuid); | |
d0752060 | 5559 | |
b6c7a5dc HB |
5560 | /* |
5561 | * Check if userspace requested an interrupt window, and that the | |
5562 | * interrupt window is open. | |
5563 | * | |
5564 | * No need to exit to userspace if we already have an interrupt queued. | |
5565 | */ | |
851ba692 | 5566 | static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu) |
b6c7a5dc | 5567 | { |
8061823a | 5568 | return (!irqchip_in_kernel(vcpu->kvm) && !kvm_cpu_has_interrupt(vcpu) && |
851ba692 | 5569 | vcpu->run->request_interrupt_window && |
5df56646 | 5570 | kvm_arch_interrupt_allowed(vcpu)); |
b6c7a5dc HB |
5571 | } |
5572 | ||
851ba692 | 5573 | static void post_kvm_run_save(struct kvm_vcpu *vcpu) |
b6c7a5dc | 5574 | { |
851ba692 AK |
5575 | struct kvm_run *kvm_run = vcpu->run; |
5576 | ||
91586a3b | 5577 | kvm_run->if_flag = (kvm_get_rflags(vcpu) & X86_EFLAGS_IF) != 0; |
2d3ad1f4 | 5578 | kvm_run->cr8 = kvm_get_cr8(vcpu); |
b6c7a5dc | 5579 | kvm_run->apic_base = kvm_get_apic_base(vcpu); |
4531220b | 5580 | if (irqchip_in_kernel(vcpu->kvm)) |
b6c7a5dc | 5581 | kvm_run->ready_for_interrupt_injection = 1; |
4531220b | 5582 | else |
b6c7a5dc | 5583 | kvm_run->ready_for_interrupt_injection = |
fa9726b0 GN |
5584 | kvm_arch_interrupt_allowed(vcpu) && |
5585 | !kvm_cpu_has_interrupt(vcpu) && | |
5586 | !kvm_event_needs_reinjection(vcpu); | |
b6c7a5dc HB |
5587 | } |
5588 | ||
b93463aa AK |
5589 | static void vapic_enter(struct kvm_vcpu *vcpu) |
5590 | { | |
5591 | struct kvm_lapic *apic = vcpu->arch.apic; | |
5592 | struct page *page; | |
5593 | ||
5594 | if (!apic || !apic->vapic_addr) | |
5595 | return; | |
5596 | ||
5597 | page = gfn_to_page(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT); | |
72dc67a6 IE |
5598 | |
5599 | vcpu->arch.apic->vapic_page = page; | |
b93463aa AK |
5600 | } |
5601 | ||
5602 | static void vapic_exit(struct kvm_vcpu *vcpu) | |
5603 | { | |
5604 | struct kvm_lapic *apic = vcpu->arch.apic; | |
f656ce01 | 5605 | int idx; |
b93463aa AK |
5606 | |
5607 | if (!apic || !apic->vapic_addr) | |
5608 | return; | |
5609 | ||
f656ce01 | 5610 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
b93463aa AK |
5611 | kvm_release_page_dirty(apic->vapic_page); |
5612 | mark_page_dirty(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT); | |
f656ce01 | 5613 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
b93463aa AK |
5614 | } |
5615 | ||
95ba8273 GN |
5616 | static void update_cr8_intercept(struct kvm_vcpu *vcpu) |
5617 | { | |
5618 | int max_irr, tpr; | |
5619 | ||
5620 | if (!kvm_x86_ops->update_cr8_intercept) | |
5621 | return; | |
5622 | ||
88c808fd AK |
5623 | if (!vcpu->arch.apic) |
5624 | return; | |
5625 | ||
8db3baa2 GN |
5626 | if (!vcpu->arch.apic->vapic_addr) |
5627 | max_irr = kvm_lapic_find_highest_irr(vcpu); | |
5628 | else | |
5629 | max_irr = -1; | |
95ba8273 GN |
5630 | |
5631 | if (max_irr != -1) | |
5632 | max_irr >>= 4; | |
5633 | ||
5634 | tpr = kvm_lapic_get_cr8(vcpu); | |
5635 | ||
5636 | kvm_x86_ops->update_cr8_intercept(vcpu, tpr, max_irr); | |
5637 | } | |
5638 | ||
851ba692 | 5639 | static void inject_pending_event(struct kvm_vcpu *vcpu) |
95ba8273 GN |
5640 | { |
5641 | /* try to reinject previous events if any */ | |
b59bb7bd | 5642 | if (vcpu->arch.exception.pending) { |
5c1c85d0 AK |
5643 | trace_kvm_inj_exception(vcpu->arch.exception.nr, |
5644 | vcpu->arch.exception.has_error_code, | |
5645 | vcpu->arch.exception.error_code); | |
b59bb7bd GN |
5646 | kvm_x86_ops->queue_exception(vcpu, vcpu->arch.exception.nr, |
5647 | vcpu->arch.exception.has_error_code, | |
ce7ddec4 JR |
5648 | vcpu->arch.exception.error_code, |
5649 | vcpu->arch.exception.reinject); | |
b59bb7bd GN |
5650 | return; |
5651 | } | |
5652 | ||
95ba8273 GN |
5653 | if (vcpu->arch.nmi_injected) { |
5654 | kvm_x86_ops->set_nmi(vcpu); | |
5655 | return; | |
5656 | } | |
5657 | ||
5658 | if (vcpu->arch.interrupt.pending) { | |
66fd3f7f | 5659 | kvm_x86_ops->set_irq(vcpu); |
95ba8273 GN |
5660 | return; |
5661 | } | |
5662 | ||
5663 | /* try to inject new event if pending */ | |
5664 | if (vcpu->arch.nmi_pending) { | |
5665 | if (kvm_x86_ops->nmi_allowed(vcpu)) { | |
7460fb4a | 5666 | --vcpu->arch.nmi_pending; |
95ba8273 GN |
5667 | vcpu->arch.nmi_injected = true; |
5668 | kvm_x86_ops->set_nmi(vcpu); | |
5669 | } | |
5670 | } else if (kvm_cpu_has_interrupt(vcpu)) { | |
5671 | if (kvm_x86_ops->interrupt_allowed(vcpu)) { | |
66fd3f7f GN |
5672 | kvm_queue_interrupt(vcpu, kvm_cpu_get_interrupt(vcpu), |
5673 | false); | |
5674 | kvm_x86_ops->set_irq(vcpu); | |
95ba8273 GN |
5675 | } |
5676 | } | |
5677 | } | |
5678 | ||
2acf923e DC |
5679 | static void kvm_load_guest_xcr0(struct kvm_vcpu *vcpu) |
5680 | { | |
5681 | if (kvm_read_cr4_bits(vcpu, X86_CR4_OSXSAVE) && | |
5682 | !vcpu->guest_xcr0_loaded) { | |
5683 | /* kvm_set_xcr() also depends on this */ | |
5684 | xsetbv(XCR_XFEATURE_ENABLED_MASK, vcpu->arch.xcr0); | |
5685 | vcpu->guest_xcr0_loaded = 1; | |
5686 | } | |
5687 | } | |
5688 | ||
5689 | static void kvm_put_guest_xcr0(struct kvm_vcpu *vcpu) | |
5690 | { | |
5691 | if (vcpu->guest_xcr0_loaded) { | |
5692 | if (vcpu->arch.xcr0 != host_xcr0) | |
5693 | xsetbv(XCR_XFEATURE_ENABLED_MASK, host_xcr0); | |
5694 | vcpu->guest_xcr0_loaded = 0; | |
5695 | } | |
5696 | } | |
5697 | ||
7460fb4a AK |
5698 | static void process_nmi(struct kvm_vcpu *vcpu) |
5699 | { | |
5700 | unsigned limit = 2; | |
5701 | ||
5702 | /* | |
5703 | * x86 is limited to one NMI running, and one NMI pending after it. | |
5704 | * If an NMI is already in progress, limit further NMIs to just one. | |
5705 | * Otherwise, allow two (and we'll inject the first one immediately). | |
5706 | */ | |
5707 | if (kvm_x86_ops->get_nmi_mask(vcpu) || vcpu->arch.nmi_injected) | |
5708 | limit = 1; | |
5709 | ||
5710 | vcpu->arch.nmi_pending += atomic_xchg(&vcpu->arch.nmi_queued, 0); | |
5711 | vcpu->arch.nmi_pending = min(vcpu->arch.nmi_pending, limit); | |
5712 | kvm_make_request(KVM_REQ_EVENT, vcpu); | |
5713 | } | |
5714 | ||
851ba692 | 5715 | static int vcpu_enter_guest(struct kvm_vcpu *vcpu) |
b6c7a5dc HB |
5716 | { |
5717 | int r; | |
6a8b1d13 | 5718 | bool req_int_win = !irqchip_in_kernel(vcpu->kvm) && |
851ba692 | 5719 | vcpu->run->request_interrupt_window; |
d6185f20 | 5720 | bool req_immediate_exit = 0; |
b6c7a5dc | 5721 | |
3e007509 | 5722 | if (vcpu->requests) { |
a8eeb04a | 5723 | if (kvm_check_request(KVM_REQ_MMU_RELOAD, vcpu)) |
2e53d63a | 5724 | kvm_mmu_unload(vcpu); |
a8eeb04a | 5725 | if (kvm_check_request(KVM_REQ_MIGRATE_TIMER, vcpu)) |
2f599714 | 5726 | __kvm_migrate_timers(vcpu); |
34c238a1 ZA |
5727 | if (kvm_check_request(KVM_REQ_CLOCK_UPDATE, vcpu)) { |
5728 | r = kvm_guest_time_update(vcpu); | |
8cfdc000 ZA |
5729 | if (unlikely(r)) |
5730 | goto out; | |
5731 | } | |
a8eeb04a | 5732 | if (kvm_check_request(KVM_REQ_MMU_SYNC, vcpu)) |
4731d4c7 | 5733 | kvm_mmu_sync_roots(vcpu); |
a8eeb04a | 5734 | if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu)) |
d4acf7e7 | 5735 | kvm_x86_ops->tlb_flush(vcpu); |
a8eeb04a | 5736 | if (kvm_check_request(KVM_REQ_REPORT_TPR_ACCESS, vcpu)) { |
851ba692 | 5737 | vcpu->run->exit_reason = KVM_EXIT_TPR_ACCESS; |
b93463aa AK |
5738 | r = 0; |
5739 | goto out; | |
5740 | } | |
a8eeb04a | 5741 | if (kvm_check_request(KVM_REQ_TRIPLE_FAULT, vcpu)) { |
851ba692 | 5742 | vcpu->run->exit_reason = KVM_EXIT_SHUTDOWN; |
71c4dfaf JR |
5743 | r = 0; |
5744 | goto out; | |
5745 | } | |
a8eeb04a | 5746 | if (kvm_check_request(KVM_REQ_DEACTIVATE_FPU, vcpu)) { |
02daab21 AK |
5747 | vcpu->fpu_active = 0; |
5748 | kvm_x86_ops->fpu_deactivate(vcpu); | |
5749 | } | |
af585b92 GN |
5750 | if (kvm_check_request(KVM_REQ_APF_HALT, vcpu)) { |
5751 | /* Page is swapped out. Do synthetic halt */ | |
5752 | vcpu->arch.apf.halted = true; | |
5753 | r = 1; | |
5754 | goto out; | |
5755 | } | |
c9aaa895 GC |
5756 | if (kvm_check_request(KVM_REQ_STEAL_UPDATE, vcpu)) |
5757 | record_steal_time(vcpu); | |
7460fb4a AK |
5758 | if (kvm_check_request(KVM_REQ_NMI, vcpu)) |
5759 | process_nmi(vcpu); | |
d6185f20 NHE |
5760 | req_immediate_exit = |
5761 | kvm_check_request(KVM_REQ_IMMEDIATE_EXIT, vcpu); | |
2f52d58c | 5762 | } |
b93463aa | 5763 | |
3e007509 AK |
5764 | r = kvm_mmu_reload(vcpu); |
5765 | if (unlikely(r)) | |
5766 | goto out; | |
5767 | ||
b463a6f7 AK |
5768 | if (kvm_check_request(KVM_REQ_EVENT, vcpu) || req_int_win) { |
5769 | inject_pending_event(vcpu); | |
5770 | ||
5771 | /* enable NMI/IRQ window open exits if needed */ | |
7460fb4a | 5772 | if (vcpu->arch.nmi_pending) |
b463a6f7 AK |
5773 | kvm_x86_ops->enable_nmi_window(vcpu); |
5774 | else if (kvm_cpu_has_interrupt(vcpu) || req_int_win) | |
5775 | kvm_x86_ops->enable_irq_window(vcpu); | |
5776 | ||
5777 | if (kvm_lapic_enabled(vcpu)) { | |
5778 | update_cr8_intercept(vcpu); | |
5779 | kvm_lapic_sync_to_vapic(vcpu); | |
5780 | } | |
5781 | } | |
5782 | ||
b6c7a5dc HB |
5783 | preempt_disable(); |
5784 | ||
5785 | kvm_x86_ops->prepare_guest_switch(vcpu); | |
2608d7a1 AK |
5786 | if (vcpu->fpu_active) |
5787 | kvm_load_guest_fpu(vcpu); | |
2acf923e | 5788 | kvm_load_guest_xcr0(vcpu); |
b6c7a5dc | 5789 | |
6b7e2d09 XG |
5790 | vcpu->mode = IN_GUEST_MODE; |
5791 | ||
5792 | /* We should set ->mode before check ->requests, | |
5793 | * see the comment in make_all_cpus_request. | |
5794 | */ | |
5795 | smp_mb(); | |
b6c7a5dc | 5796 | |
d94e1dc9 | 5797 | local_irq_disable(); |
32f88400 | 5798 | |
6b7e2d09 | 5799 | if (vcpu->mode == EXITING_GUEST_MODE || vcpu->requests |
d94e1dc9 | 5800 | || need_resched() || signal_pending(current)) { |
6b7e2d09 | 5801 | vcpu->mode = OUTSIDE_GUEST_MODE; |
d94e1dc9 | 5802 | smp_wmb(); |
6c142801 AK |
5803 | local_irq_enable(); |
5804 | preempt_enable(); | |
b463a6f7 | 5805 | kvm_x86_ops->cancel_injection(vcpu); |
6c142801 AK |
5806 | r = 1; |
5807 | goto out; | |
5808 | } | |
5809 | ||
f656ce01 | 5810 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
3200f405 | 5811 | |
d6185f20 NHE |
5812 | if (req_immediate_exit) |
5813 | smp_send_reschedule(vcpu->cpu); | |
5814 | ||
b6c7a5dc HB |
5815 | kvm_guest_enter(); |
5816 | ||
42dbaa5a | 5817 | if (unlikely(vcpu->arch.switch_db_regs)) { |
42dbaa5a JK |
5818 | set_debugreg(0, 7); |
5819 | set_debugreg(vcpu->arch.eff_db[0], 0); | |
5820 | set_debugreg(vcpu->arch.eff_db[1], 1); | |
5821 | set_debugreg(vcpu->arch.eff_db[2], 2); | |
5822 | set_debugreg(vcpu->arch.eff_db[3], 3); | |
5823 | } | |
b6c7a5dc | 5824 | |
229456fc | 5825 | trace_kvm_entry(vcpu->vcpu_id); |
851ba692 | 5826 | kvm_x86_ops->run(vcpu); |
b6c7a5dc | 5827 | |
24f1e32c FW |
5828 | /* |
5829 | * If the guest has used debug registers, at least dr7 | |
5830 | * will be disabled while returning to the host. | |
5831 | * If we don't have active breakpoints in the host, we don't | |
5832 | * care about the messed up debug address registers. But if | |
5833 | * we have some of them active, restore the old state. | |
5834 | */ | |
59d8eb53 | 5835 | if (hw_breakpoint_active()) |
24f1e32c | 5836 | hw_breakpoint_restore(); |
42dbaa5a | 5837 | |
d5c1785d | 5838 | vcpu->arch.last_guest_tsc = kvm_x86_ops->read_l1_tsc(vcpu); |
1d5f066e | 5839 | |
6b7e2d09 | 5840 | vcpu->mode = OUTSIDE_GUEST_MODE; |
d94e1dc9 | 5841 | smp_wmb(); |
b6c7a5dc HB |
5842 | local_irq_enable(); |
5843 | ||
5844 | ++vcpu->stat.exits; | |
5845 | ||
5846 | /* | |
5847 | * We must have an instruction between local_irq_enable() and | |
5848 | * kvm_guest_exit(), so the timer interrupt isn't delayed by | |
5849 | * the interrupt shadow. The stat.exits increment will do nicely. | |
5850 | * But we need to prevent reordering, hence this barrier(): | |
5851 | */ | |
5852 | barrier(); | |
5853 | ||
5854 | kvm_guest_exit(); | |
5855 | ||
5856 | preempt_enable(); | |
5857 | ||
f656ce01 | 5858 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
3200f405 | 5859 | |
b6c7a5dc HB |
5860 | /* |
5861 | * Profile KVM exit RIPs: | |
5862 | */ | |
5863 | if (unlikely(prof_on == KVM_PROFILING)) { | |
5fdbf976 MT |
5864 | unsigned long rip = kvm_rip_read(vcpu); |
5865 | profile_hit(KVM_PROFILING, (void *)rip); | |
b6c7a5dc HB |
5866 | } |
5867 | ||
298101da | 5868 | |
b93463aa AK |
5869 | kvm_lapic_sync_from_vapic(vcpu); |
5870 | ||
851ba692 | 5871 | r = kvm_x86_ops->handle_exit(vcpu); |
d7690175 MT |
5872 | out: |
5873 | return r; | |
5874 | } | |
b6c7a5dc | 5875 | |
09cec754 | 5876 | |
851ba692 | 5877 | static int __vcpu_run(struct kvm_vcpu *vcpu) |
d7690175 MT |
5878 | { |
5879 | int r; | |
f656ce01 | 5880 | struct kvm *kvm = vcpu->kvm; |
d7690175 MT |
5881 | |
5882 | if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_SIPI_RECEIVED)) { | |
1b10bf31 JK |
5883 | pr_debug("vcpu %d received sipi with vector # %x\n", |
5884 | vcpu->vcpu_id, vcpu->arch.sipi_vector); | |
d7690175 | 5885 | kvm_lapic_reset(vcpu); |
5f179287 | 5886 | r = kvm_arch_vcpu_reset(vcpu); |
d7690175 MT |
5887 | if (r) |
5888 | return r; | |
5889 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; | |
b6c7a5dc HB |
5890 | } |
5891 | ||
f656ce01 | 5892 | vcpu->srcu_idx = srcu_read_lock(&kvm->srcu); |
d7690175 MT |
5893 | vapic_enter(vcpu); |
5894 | ||
5895 | r = 1; | |
5896 | while (r > 0) { | |
af585b92 GN |
5897 | if (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE && |
5898 | !vcpu->arch.apf.halted) | |
851ba692 | 5899 | r = vcpu_enter_guest(vcpu); |
d7690175 | 5900 | else { |
f656ce01 | 5901 | srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx); |
d7690175 | 5902 | kvm_vcpu_block(vcpu); |
f656ce01 | 5903 | vcpu->srcu_idx = srcu_read_lock(&kvm->srcu); |
a8eeb04a | 5904 | if (kvm_check_request(KVM_REQ_UNHALT, vcpu)) |
09cec754 GN |
5905 | { |
5906 | switch(vcpu->arch.mp_state) { | |
5907 | case KVM_MP_STATE_HALTED: | |
d7690175 | 5908 | vcpu->arch.mp_state = |
09cec754 GN |
5909 | KVM_MP_STATE_RUNNABLE; |
5910 | case KVM_MP_STATE_RUNNABLE: | |
af585b92 | 5911 | vcpu->arch.apf.halted = false; |
09cec754 GN |
5912 | break; |
5913 | case KVM_MP_STATE_SIPI_RECEIVED: | |
5914 | default: | |
5915 | r = -EINTR; | |
5916 | break; | |
5917 | } | |
5918 | } | |
d7690175 MT |
5919 | } |
5920 | ||
09cec754 GN |
5921 | if (r <= 0) |
5922 | break; | |
5923 | ||
5924 | clear_bit(KVM_REQ_PENDING_TIMER, &vcpu->requests); | |
5925 | if (kvm_cpu_has_pending_timer(vcpu)) | |
5926 | kvm_inject_pending_timer_irqs(vcpu); | |
5927 | ||
851ba692 | 5928 | if (dm_request_for_irq_injection(vcpu)) { |
09cec754 | 5929 | r = -EINTR; |
851ba692 | 5930 | vcpu->run->exit_reason = KVM_EXIT_INTR; |
09cec754 GN |
5931 | ++vcpu->stat.request_irq_exits; |
5932 | } | |
af585b92 GN |
5933 | |
5934 | kvm_check_async_pf_completion(vcpu); | |
5935 | ||
09cec754 GN |
5936 | if (signal_pending(current)) { |
5937 | r = -EINTR; | |
851ba692 | 5938 | vcpu->run->exit_reason = KVM_EXIT_INTR; |
09cec754 GN |
5939 | ++vcpu->stat.signal_exits; |
5940 | } | |
5941 | if (need_resched()) { | |
f656ce01 | 5942 | srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx); |
09cec754 | 5943 | kvm_resched(vcpu); |
f656ce01 | 5944 | vcpu->srcu_idx = srcu_read_lock(&kvm->srcu); |
d7690175 | 5945 | } |
b6c7a5dc HB |
5946 | } |
5947 | ||
f656ce01 | 5948 | srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx); |
b6c7a5dc | 5949 | |
b93463aa AK |
5950 | vapic_exit(vcpu); |
5951 | ||
b6c7a5dc HB |
5952 | return r; |
5953 | } | |
5954 | ||
5287f194 AK |
5955 | static int complete_mmio(struct kvm_vcpu *vcpu) |
5956 | { | |
5957 | struct kvm_run *run = vcpu->run; | |
5958 | int r; | |
5959 | ||
5960 | if (!(vcpu->arch.pio.count || vcpu->mmio_needed)) | |
5961 | return 1; | |
5962 | ||
5963 | if (vcpu->mmio_needed) { | |
5287f194 | 5964 | vcpu->mmio_needed = 0; |
cef4dea0 | 5965 | if (!vcpu->mmio_is_write) |
0004c7c2 GN |
5966 | memcpy(vcpu->mmio_data + vcpu->mmio_index, |
5967 | run->mmio.data, 8); | |
cef4dea0 AK |
5968 | vcpu->mmio_index += 8; |
5969 | if (vcpu->mmio_index < vcpu->mmio_size) { | |
5970 | run->exit_reason = KVM_EXIT_MMIO; | |
5971 | run->mmio.phys_addr = vcpu->mmio_phys_addr + vcpu->mmio_index; | |
5972 | memcpy(run->mmio.data, vcpu->mmio_data + vcpu->mmio_index, 8); | |
5973 | run->mmio.len = min(vcpu->mmio_size - vcpu->mmio_index, 8); | |
5974 | run->mmio.is_write = vcpu->mmio_is_write; | |
5975 | vcpu->mmio_needed = 1; | |
5976 | return 0; | |
5977 | } | |
5978 | if (vcpu->mmio_is_write) | |
5979 | return 1; | |
5980 | vcpu->mmio_read_completed = 1; | |
5287f194 AK |
5981 | } |
5982 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); | |
5983 | r = emulate_instruction(vcpu, EMULTYPE_NO_DECODE); | |
5984 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); | |
5985 | if (r != EMULATE_DONE) | |
5986 | return 0; | |
5987 | return 1; | |
5988 | } | |
5989 | ||
b6c7a5dc HB |
5990 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
5991 | { | |
5992 | int r; | |
5993 | sigset_t sigsaved; | |
5994 | ||
e5c30142 AK |
5995 | if (!tsk_used_math(current) && init_fpu(current)) |
5996 | return -ENOMEM; | |
5997 | ||
ac9f6dc0 AK |
5998 | if (vcpu->sigset_active) |
5999 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
6000 | ||
a4535290 | 6001 | if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)) { |
b6c7a5dc | 6002 | kvm_vcpu_block(vcpu); |
d7690175 | 6003 | clear_bit(KVM_REQ_UNHALT, &vcpu->requests); |
ac9f6dc0 AK |
6004 | r = -EAGAIN; |
6005 | goto out; | |
b6c7a5dc HB |
6006 | } |
6007 | ||
b6c7a5dc | 6008 | /* re-sync apic's tpr */ |
eea1cff9 AP |
6009 | if (!irqchip_in_kernel(vcpu->kvm)) { |
6010 | if (kvm_set_cr8(vcpu, kvm_run->cr8) != 0) { | |
6011 | r = -EINVAL; | |
6012 | goto out; | |
6013 | } | |
6014 | } | |
b6c7a5dc | 6015 | |
5287f194 AK |
6016 | r = complete_mmio(vcpu); |
6017 | if (r <= 0) | |
6018 | goto out; | |
6019 | ||
5fdbf976 MT |
6020 | if (kvm_run->exit_reason == KVM_EXIT_HYPERCALL) |
6021 | kvm_register_write(vcpu, VCPU_REGS_RAX, | |
6022 | kvm_run->hypercall.ret); | |
b6c7a5dc | 6023 | |
851ba692 | 6024 | r = __vcpu_run(vcpu); |
b6c7a5dc HB |
6025 | |
6026 | out: | |
f1d86e46 | 6027 | post_kvm_run_save(vcpu); |
b6c7a5dc HB |
6028 | if (vcpu->sigset_active) |
6029 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
6030 | ||
b6c7a5dc HB |
6031 | return r; |
6032 | } | |
6033 | ||
6034 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
6035 | { | |
7ae441ea GN |
6036 | if (vcpu->arch.emulate_regs_need_sync_to_vcpu) { |
6037 | /* | |
6038 | * We are here if userspace calls get_regs() in the middle of | |
6039 | * instruction emulation. Registers state needs to be copied | |
6040 | * back from emulation context to vcpu. Usrapace shouldn't do | |
6041 | * that usually, but some bad designed PV devices (vmware | |
6042 | * backdoor interface) need this to work | |
6043 | */ | |
9dac77fa AK |
6044 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; |
6045 | memcpy(vcpu->arch.regs, ctxt->regs, sizeof ctxt->regs); | |
7ae441ea GN |
6046 | vcpu->arch.emulate_regs_need_sync_to_vcpu = false; |
6047 | } | |
5fdbf976 MT |
6048 | regs->rax = kvm_register_read(vcpu, VCPU_REGS_RAX); |
6049 | regs->rbx = kvm_register_read(vcpu, VCPU_REGS_RBX); | |
6050 | regs->rcx = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
6051 | regs->rdx = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
6052 | regs->rsi = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
6053 | regs->rdi = kvm_register_read(vcpu, VCPU_REGS_RDI); | |
6054 | regs->rsp = kvm_register_read(vcpu, VCPU_REGS_RSP); | |
6055 | regs->rbp = kvm_register_read(vcpu, VCPU_REGS_RBP); | |
b6c7a5dc | 6056 | #ifdef CONFIG_X86_64 |
5fdbf976 MT |
6057 | regs->r8 = kvm_register_read(vcpu, VCPU_REGS_R8); |
6058 | regs->r9 = kvm_register_read(vcpu, VCPU_REGS_R9); | |
6059 | regs->r10 = kvm_register_read(vcpu, VCPU_REGS_R10); | |
6060 | regs->r11 = kvm_register_read(vcpu, VCPU_REGS_R11); | |
6061 | regs->r12 = kvm_register_read(vcpu, VCPU_REGS_R12); | |
6062 | regs->r13 = kvm_register_read(vcpu, VCPU_REGS_R13); | |
6063 | regs->r14 = kvm_register_read(vcpu, VCPU_REGS_R14); | |
6064 | regs->r15 = kvm_register_read(vcpu, VCPU_REGS_R15); | |
b6c7a5dc HB |
6065 | #endif |
6066 | ||
5fdbf976 | 6067 | regs->rip = kvm_rip_read(vcpu); |
91586a3b | 6068 | regs->rflags = kvm_get_rflags(vcpu); |
b6c7a5dc | 6069 | |
b6c7a5dc HB |
6070 | return 0; |
6071 | } | |
6072 | ||
6073 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
6074 | { | |
7ae441ea GN |
6075 | vcpu->arch.emulate_regs_need_sync_from_vcpu = true; |
6076 | vcpu->arch.emulate_regs_need_sync_to_vcpu = false; | |
6077 | ||
5fdbf976 MT |
6078 | kvm_register_write(vcpu, VCPU_REGS_RAX, regs->rax); |
6079 | kvm_register_write(vcpu, VCPU_REGS_RBX, regs->rbx); | |
6080 | kvm_register_write(vcpu, VCPU_REGS_RCX, regs->rcx); | |
6081 | kvm_register_write(vcpu, VCPU_REGS_RDX, regs->rdx); | |
6082 | kvm_register_write(vcpu, VCPU_REGS_RSI, regs->rsi); | |
6083 | kvm_register_write(vcpu, VCPU_REGS_RDI, regs->rdi); | |
6084 | kvm_register_write(vcpu, VCPU_REGS_RSP, regs->rsp); | |
6085 | kvm_register_write(vcpu, VCPU_REGS_RBP, regs->rbp); | |
b6c7a5dc | 6086 | #ifdef CONFIG_X86_64 |
5fdbf976 MT |
6087 | kvm_register_write(vcpu, VCPU_REGS_R8, regs->r8); |
6088 | kvm_register_write(vcpu, VCPU_REGS_R9, regs->r9); | |
6089 | kvm_register_write(vcpu, VCPU_REGS_R10, regs->r10); | |
6090 | kvm_register_write(vcpu, VCPU_REGS_R11, regs->r11); | |
6091 | kvm_register_write(vcpu, VCPU_REGS_R12, regs->r12); | |
6092 | kvm_register_write(vcpu, VCPU_REGS_R13, regs->r13); | |
6093 | kvm_register_write(vcpu, VCPU_REGS_R14, regs->r14); | |
6094 | kvm_register_write(vcpu, VCPU_REGS_R15, regs->r15); | |
b6c7a5dc HB |
6095 | #endif |
6096 | ||
5fdbf976 | 6097 | kvm_rip_write(vcpu, regs->rip); |
91586a3b | 6098 | kvm_set_rflags(vcpu, regs->rflags); |
b6c7a5dc | 6099 | |
b4f14abd JK |
6100 | vcpu->arch.exception.pending = false; |
6101 | ||
3842d135 AK |
6102 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
6103 | ||
b6c7a5dc HB |
6104 | return 0; |
6105 | } | |
6106 | ||
b6c7a5dc HB |
6107 | void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l) |
6108 | { | |
6109 | struct kvm_segment cs; | |
6110 | ||
3e6e0aab | 6111 | kvm_get_segment(vcpu, &cs, VCPU_SREG_CS); |
b6c7a5dc HB |
6112 | *db = cs.db; |
6113 | *l = cs.l; | |
6114 | } | |
6115 | EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits); | |
6116 | ||
6117 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, | |
6118 | struct kvm_sregs *sregs) | |
6119 | { | |
89a27f4d | 6120 | struct desc_ptr dt; |
b6c7a5dc | 6121 | |
3e6e0aab GT |
6122 | kvm_get_segment(vcpu, &sregs->cs, VCPU_SREG_CS); |
6123 | kvm_get_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
6124 | kvm_get_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
6125 | kvm_get_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
6126 | kvm_get_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
6127 | kvm_get_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
b6c7a5dc | 6128 | |
3e6e0aab GT |
6129 | kvm_get_segment(vcpu, &sregs->tr, VCPU_SREG_TR); |
6130 | kvm_get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
b6c7a5dc HB |
6131 | |
6132 | kvm_x86_ops->get_idt(vcpu, &dt); | |
89a27f4d GN |
6133 | sregs->idt.limit = dt.size; |
6134 | sregs->idt.base = dt.address; | |
b6c7a5dc | 6135 | kvm_x86_ops->get_gdt(vcpu, &dt); |
89a27f4d GN |
6136 | sregs->gdt.limit = dt.size; |
6137 | sregs->gdt.base = dt.address; | |
b6c7a5dc | 6138 | |
4d4ec087 | 6139 | sregs->cr0 = kvm_read_cr0(vcpu); |
ad312c7c | 6140 | sregs->cr2 = vcpu->arch.cr2; |
9f8fe504 | 6141 | sregs->cr3 = kvm_read_cr3(vcpu); |
fc78f519 | 6142 | sregs->cr4 = kvm_read_cr4(vcpu); |
2d3ad1f4 | 6143 | sregs->cr8 = kvm_get_cr8(vcpu); |
f6801dff | 6144 | sregs->efer = vcpu->arch.efer; |
b6c7a5dc HB |
6145 | sregs->apic_base = kvm_get_apic_base(vcpu); |
6146 | ||
923c61bb | 6147 | memset(sregs->interrupt_bitmap, 0, sizeof sregs->interrupt_bitmap); |
b6c7a5dc | 6148 | |
36752c9b | 6149 | if (vcpu->arch.interrupt.pending && !vcpu->arch.interrupt.soft) |
14d0bc1f GN |
6150 | set_bit(vcpu->arch.interrupt.nr, |
6151 | (unsigned long *)sregs->interrupt_bitmap); | |
16d7a191 | 6152 | |
b6c7a5dc HB |
6153 | return 0; |
6154 | } | |
6155 | ||
62d9f0db MT |
6156 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
6157 | struct kvm_mp_state *mp_state) | |
6158 | { | |
62d9f0db | 6159 | mp_state->mp_state = vcpu->arch.mp_state; |
62d9f0db MT |
6160 | return 0; |
6161 | } | |
6162 | ||
6163 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
6164 | struct kvm_mp_state *mp_state) | |
6165 | { | |
62d9f0db | 6166 | vcpu->arch.mp_state = mp_state->mp_state; |
3842d135 | 6167 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
62d9f0db MT |
6168 | return 0; |
6169 | } | |
6170 | ||
e269fb21 JK |
6171 | int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int reason, |
6172 | bool has_error_code, u32 error_code) | |
b6c7a5dc | 6173 | { |
9d74191a | 6174 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; |
8ec4722d | 6175 | int ret; |
e01c2426 | 6176 | |
8ec4722d | 6177 | init_emulate_ctxt(vcpu); |
c697518a | 6178 | |
9d74191a TY |
6179 | ret = emulator_task_switch(ctxt, tss_selector, reason, |
6180 | has_error_code, error_code); | |
c697518a | 6181 | |
c697518a | 6182 | if (ret) |
19d04437 | 6183 | return EMULATE_FAIL; |
37817f29 | 6184 | |
9dac77fa | 6185 | memcpy(vcpu->arch.regs, ctxt->regs, sizeof ctxt->regs); |
9d74191a TY |
6186 | kvm_rip_write(vcpu, ctxt->eip); |
6187 | kvm_set_rflags(vcpu, ctxt->eflags); | |
3842d135 | 6188 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
19d04437 | 6189 | return EMULATE_DONE; |
37817f29 IE |
6190 | } |
6191 | EXPORT_SYMBOL_GPL(kvm_task_switch); | |
6192 | ||
b6c7a5dc HB |
6193 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, |
6194 | struct kvm_sregs *sregs) | |
6195 | { | |
6196 | int mmu_reset_needed = 0; | |
63f42e02 | 6197 | int pending_vec, max_bits, idx; |
89a27f4d | 6198 | struct desc_ptr dt; |
b6c7a5dc | 6199 | |
89a27f4d GN |
6200 | dt.size = sregs->idt.limit; |
6201 | dt.address = sregs->idt.base; | |
b6c7a5dc | 6202 | kvm_x86_ops->set_idt(vcpu, &dt); |
89a27f4d GN |
6203 | dt.size = sregs->gdt.limit; |
6204 | dt.address = sregs->gdt.base; | |
b6c7a5dc HB |
6205 | kvm_x86_ops->set_gdt(vcpu, &dt); |
6206 | ||
ad312c7c | 6207 | vcpu->arch.cr2 = sregs->cr2; |
9f8fe504 | 6208 | mmu_reset_needed |= kvm_read_cr3(vcpu) != sregs->cr3; |
dc7e795e | 6209 | vcpu->arch.cr3 = sregs->cr3; |
aff48baa | 6210 | __set_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail); |
b6c7a5dc | 6211 | |
2d3ad1f4 | 6212 | kvm_set_cr8(vcpu, sregs->cr8); |
b6c7a5dc | 6213 | |
f6801dff | 6214 | mmu_reset_needed |= vcpu->arch.efer != sregs->efer; |
b6c7a5dc | 6215 | kvm_x86_ops->set_efer(vcpu, sregs->efer); |
b6c7a5dc HB |
6216 | kvm_set_apic_base(vcpu, sregs->apic_base); |
6217 | ||
4d4ec087 | 6218 | mmu_reset_needed |= kvm_read_cr0(vcpu) != sregs->cr0; |
b6c7a5dc | 6219 | kvm_x86_ops->set_cr0(vcpu, sregs->cr0); |
d7306163 | 6220 | vcpu->arch.cr0 = sregs->cr0; |
b6c7a5dc | 6221 | |
fc78f519 | 6222 | mmu_reset_needed |= kvm_read_cr4(vcpu) != sregs->cr4; |
b6c7a5dc | 6223 | kvm_x86_ops->set_cr4(vcpu, sregs->cr4); |
3ea3aa8c SY |
6224 | if (sregs->cr4 & X86_CR4_OSXSAVE) |
6225 | update_cpuid(vcpu); | |
63f42e02 XG |
6226 | |
6227 | idx = srcu_read_lock(&vcpu->kvm->srcu); | |
7c93be44 | 6228 | if (!is_long_mode(vcpu) && is_pae(vcpu)) { |
9f8fe504 | 6229 | load_pdptrs(vcpu, vcpu->arch.walk_mmu, kvm_read_cr3(vcpu)); |
7c93be44 MT |
6230 | mmu_reset_needed = 1; |
6231 | } | |
63f42e02 | 6232 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
b6c7a5dc HB |
6233 | |
6234 | if (mmu_reset_needed) | |
6235 | kvm_mmu_reset_context(vcpu); | |
6236 | ||
923c61bb GN |
6237 | max_bits = (sizeof sregs->interrupt_bitmap) << 3; |
6238 | pending_vec = find_first_bit( | |
6239 | (const unsigned long *)sregs->interrupt_bitmap, max_bits); | |
6240 | if (pending_vec < max_bits) { | |
66fd3f7f | 6241 | kvm_queue_interrupt(vcpu, pending_vec, false); |
923c61bb | 6242 | pr_debug("Set back pending irq %d\n", pending_vec); |
b6c7a5dc HB |
6243 | } |
6244 | ||
3e6e0aab GT |
6245 | kvm_set_segment(vcpu, &sregs->cs, VCPU_SREG_CS); |
6246 | kvm_set_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
6247 | kvm_set_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
6248 | kvm_set_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
6249 | kvm_set_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
6250 | kvm_set_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
b6c7a5dc | 6251 | |
3e6e0aab GT |
6252 | kvm_set_segment(vcpu, &sregs->tr, VCPU_SREG_TR); |
6253 | kvm_set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
b6c7a5dc | 6254 | |
5f0269f5 ME |
6255 | update_cr8_intercept(vcpu); |
6256 | ||
9c3e4aab | 6257 | /* Older userspace won't unhalt the vcpu on reset. */ |
c5af89b6 | 6258 | if (kvm_vcpu_is_bsp(vcpu) && kvm_rip_read(vcpu) == 0xfff0 && |
9c3e4aab | 6259 | sregs->cs.selector == 0xf000 && sregs->cs.base == 0xffff0000 && |
3eeb3288 | 6260 | !is_protmode(vcpu)) |
9c3e4aab MT |
6261 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
6262 | ||
3842d135 AK |
6263 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
6264 | ||
b6c7a5dc HB |
6265 | return 0; |
6266 | } | |
6267 | ||
d0bfb940 JK |
6268 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
6269 | struct kvm_guest_debug *dbg) | |
b6c7a5dc | 6270 | { |
355be0b9 | 6271 | unsigned long rflags; |
ae675ef0 | 6272 | int i, r; |
b6c7a5dc | 6273 | |
4f926bf2 JK |
6274 | if (dbg->control & (KVM_GUESTDBG_INJECT_DB | KVM_GUESTDBG_INJECT_BP)) { |
6275 | r = -EBUSY; | |
6276 | if (vcpu->arch.exception.pending) | |
2122ff5e | 6277 | goto out; |
4f926bf2 JK |
6278 | if (dbg->control & KVM_GUESTDBG_INJECT_DB) |
6279 | kvm_queue_exception(vcpu, DB_VECTOR); | |
6280 | else | |
6281 | kvm_queue_exception(vcpu, BP_VECTOR); | |
6282 | } | |
6283 | ||
91586a3b JK |
6284 | /* |
6285 | * Read rflags as long as potentially injected trace flags are still | |
6286 | * filtered out. | |
6287 | */ | |
6288 | rflags = kvm_get_rflags(vcpu); | |
355be0b9 JK |
6289 | |
6290 | vcpu->guest_debug = dbg->control; | |
6291 | if (!(vcpu->guest_debug & KVM_GUESTDBG_ENABLE)) | |
6292 | vcpu->guest_debug = 0; | |
6293 | ||
6294 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) { | |
ae675ef0 JK |
6295 | for (i = 0; i < KVM_NR_DB_REGS; ++i) |
6296 | vcpu->arch.eff_db[i] = dbg->arch.debugreg[i]; | |
6297 | vcpu->arch.switch_db_regs = | |
6298 | (dbg->arch.debugreg[7] & DR7_BP_EN_MASK); | |
6299 | } else { | |
6300 | for (i = 0; i < KVM_NR_DB_REGS; i++) | |
6301 | vcpu->arch.eff_db[i] = vcpu->arch.db[i]; | |
6302 | vcpu->arch.switch_db_regs = (vcpu->arch.dr7 & DR7_BP_EN_MASK); | |
6303 | } | |
6304 | ||
f92653ee JK |
6305 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) |
6306 | vcpu->arch.singlestep_rip = kvm_rip_read(vcpu) + | |
6307 | get_segment_base(vcpu, VCPU_SREG_CS); | |
94fe45da | 6308 | |
91586a3b JK |
6309 | /* |
6310 | * Trigger an rflags update that will inject or remove the trace | |
6311 | * flags. | |
6312 | */ | |
6313 | kvm_set_rflags(vcpu, rflags); | |
b6c7a5dc | 6314 | |
355be0b9 | 6315 | kvm_x86_ops->set_guest_debug(vcpu, dbg); |
b6c7a5dc | 6316 | |
4f926bf2 | 6317 | r = 0; |
d0bfb940 | 6318 | |
2122ff5e | 6319 | out: |
b6c7a5dc HB |
6320 | |
6321 | return r; | |
6322 | } | |
6323 | ||
8b006791 ZX |
6324 | /* |
6325 | * Translate a guest virtual address to a guest physical address. | |
6326 | */ | |
6327 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, | |
6328 | struct kvm_translation *tr) | |
6329 | { | |
6330 | unsigned long vaddr = tr->linear_address; | |
6331 | gpa_t gpa; | |
f656ce01 | 6332 | int idx; |
8b006791 | 6333 | |
f656ce01 | 6334 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
1871c602 | 6335 | gpa = kvm_mmu_gva_to_gpa_system(vcpu, vaddr, NULL); |
f656ce01 | 6336 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
8b006791 ZX |
6337 | tr->physical_address = gpa; |
6338 | tr->valid = gpa != UNMAPPED_GVA; | |
6339 | tr->writeable = 1; | |
6340 | tr->usermode = 0; | |
8b006791 ZX |
6341 | |
6342 | return 0; | |
6343 | } | |
6344 | ||
d0752060 HB |
6345 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) |
6346 | { | |
98918833 SY |
6347 | struct i387_fxsave_struct *fxsave = |
6348 | &vcpu->arch.guest_fpu.state->fxsave; | |
d0752060 | 6349 | |
d0752060 HB |
6350 | memcpy(fpu->fpr, fxsave->st_space, 128); |
6351 | fpu->fcw = fxsave->cwd; | |
6352 | fpu->fsw = fxsave->swd; | |
6353 | fpu->ftwx = fxsave->twd; | |
6354 | fpu->last_opcode = fxsave->fop; | |
6355 | fpu->last_ip = fxsave->rip; | |
6356 | fpu->last_dp = fxsave->rdp; | |
6357 | memcpy(fpu->xmm, fxsave->xmm_space, sizeof fxsave->xmm_space); | |
6358 | ||
d0752060 HB |
6359 | return 0; |
6360 | } | |
6361 | ||
6362 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
6363 | { | |
98918833 SY |
6364 | struct i387_fxsave_struct *fxsave = |
6365 | &vcpu->arch.guest_fpu.state->fxsave; | |
d0752060 | 6366 | |
d0752060 HB |
6367 | memcpy(fxsave->st_space, fpu->fpr, 128); |
6368 | fxsave->cwd = fpu->fcw; | |
6369 | fxsave->swd = fpu->fsw; | |
6370 | fxsave->twd = fpu->ftwx; | |
6371 | fxsave->fop = fpu->last_opcode; | |
6372 | fxsave->rip = fpu->last_ip; | |
6373 | fxsave->rdp = fpu->last_dp; | |
6374 | memcpy(fxsave->xmm_space, fpu->xmm, sizeof fxsave->xmm_space); | |
6375 | ||
d0752060 HB |
6376 | return 0; |
6377 | } | |
6378 | ||
10ab25cd | 6379 | int fx_init(struct kvm_vcpu *vcpu) |
d0752060 | 6380 | { |
10ab25cd JK |
6381 | int err; |
6382 | ||
6383 | err = fpu_alloc(&vcpu->arch.guest_fpu); | |
6384 | if (err) | |
6385 | return err; | |
6386 | ||
98918833 | 6387 | fpu_finit(&vcpu->arch.guest_fpu); |
d0752060 | 6388 | |
2acf923e DC |
6389 | /* |
6390 | * Ensure guest xcr0 is valid for loading | |
6391 | */ | |
6392 | vcpu->arch.xcr0 = XSTATE_FP; | |
6393 | ||
ad312c7c | 6394 | vcpu->arch.cr0 |= X86_CR0_ET; |
10ab25cd JK |
6395 | |
6396 | return 0; | |
d0752060 HB |
6397 | } |
6398 | EXPORT_SYMBOL_GPL(fx_init); | |
6399 | ||
98918833 SY |
6400 | static void fx_free(struct kvm_vcpu *vcpu) |
6401 | { | |
6402 | fpu_free(&vcpu->arch.guest_fpu); | |
6403 | } | |
6404 | ||
d0752060 HB |
6405 | void kvm_load_guest_fpu(struct kvm_vcpu *vcpu) |
6406 | { | |
2608d7a1 | 6407 | if (vcpu->guest_fpu_loaded) |
d0752060 HB |
6408 | return; |
6409 | ||
2acf923e DC |
6410 | /* |
6411 | * Restore all possible states in the guest, | |
6412 | * and assume host would use all available bits. | |
6413 | * Guest xcr0 would be loaded later. | |
6414 | */ | |
6415 | kvm_put_guest_xcr0(vcpu); | |
d0752060 | 6416 | vcpu->guest_fpu_loaded = 1; |
7cf30855 | 6417 | unlazy_fpu(current); |
98918833 | 6418 | fpu_restore_checking(&vcpu->arch.guest_fpu); |
0c04851c | 6419 | trace_kvm_fpu(1); |
d0752060 | 6420 | } |
d0752060 HB |
6421 | |
6422 | void kvm_put_guest_fpu(struct kvm_vcpu *vcpu) | |
6423 | { | |
2acf923e DC |
6424 | kvm_put_guest_xcr0(vcpu); |
6425 | ||
d0752060 HB |
6426 | if (!vcpu->guest_fpu_loaded) |
6427 | return; | |
6428 | ||
6429 | vcpu->guest_fpu_loaded = 0; | |
98918833 | 6430 | fpu_save_init(&vcpu->arch.guest_fpu); |
f096ed85 | 6431 | ++vcpu->stat.fpu_reload; |
a8eeb04a | 6432 | kvm_make_request(KVM_REQ_DEACTIVATE_FPU, vcpu); |
0c04851c | 6433 | trace_kvm_fpu(0); |
d0752060 | 6434 | } |
e9b11c17 ZX |
6435 | |
6436 | void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu) | |
6437 | { | |
12f9a48f | 6438 | kvmclock_reset(vcpu); |
7f1ea208 | 6439 | |
f5f48ee1 | 6440 | free_cpumask_var(vcpu->arch.wbinvd_dirty_mask); |
98918833 | 6441 | fx_free(vcpu); |
e9b11c17 ZX |
6442 | kvm_x86_ops->vcpu_free(vcpu); |
6443 | } | |
6444 | ||
6445 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, | |
6446 | unsigned int id) | |
6447 | { | |
6755bae8 ZA |
6448 | if (check_tsc_unstable() && atomic_read(&kvm->online_vcpus) != 0) |
6449 | printk_once(KERN_WARNING | |
6450 | "kvm: SMP vm created on host with unstable TSC; " | |
6451 | "guest TSC will not be reliable\n"); | |
26e5215f AK |
6452 | return kvm_x86_ops->vcpu_create(kvm, id); |
6453 | } | |
e9b11c17 | 6454 | |
26e5215f AK |
6455 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) |
6456 | { | |
6457 | int r; | |
e9b11c17 | 6458 | |
0bed3b56 | 6459 | vcpu->arch.mtrr_state.have_fixed = 1; |
e9b11c17 ZX |
6460 | vcpu_load(vcpu); |
6461 | r = kvm_arch_vcpu_reset(vcpu); | |
6462 | if (r == 0) | |
6463 | r = kvm_mmu_setup(vcpu); | |
6464 | vcpu_put(vcpu); | |
e9b11c17 | 6465 | |
26e5215f | 6466 | return r; |
e9b11c17 ZX |
6467 | } |
6468 | ||
d40ccc62 | 6469 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
e9b11c17 | 6470 | { |
344d9588 GN |
6471 | vcpu->arch.apf.msr_val = 0; |
6472 | ||
e9b11c17 ZX |
6473 | vcpu_load(vcpu); |
6474 | kvm_mmu_unload(vcpu); | |
6475 | vcpu_put(vcpu); | |
6476 | ||
98918833 | 6477 | fx_free(vcpu); |
e9b11c17 ZX |
6478 | kvm_x86_ops->vcpu_free(vcpu); |
6479 | } | |
6480 | ||
6481 | int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu) | |
6482 | { | |
7460fb4a AK |
6483 | atomic_set(&vcpu->arch.nmi_queued, 0); |
6484 | vcpu->arch.nmi_pending = 0; | |
448fa4a9 JK |
6485 | vcpu->arch.nmi_injected = false; |
6486 | ||
42dbaa5a JK |
6487 | vcpu->arch.switch_db_regs = 0; |
6488 | memset(vcpu->arch.db, 0, sizeof(vcpu->arch.db)); | |
6489 | vcpu->arch.dr6 = DR6_FIXED_1; | |
6490 | vcpu->arch.dr7 = DR7_FIXED_1; | |
6491 | ||
3842d135 | 6492 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
344d9588 | 6493 | vcpu->arch.apf.msr_val = 0; |
c9aaa895 | 6494 | vcpu->arch.st.msr_val = 0; |
3842d135 | 6495 | |
12f9a48f GC |
6496 | kvmclock_reset(vcpu); |
6497 | ||
af585b92 GN |
6498 | kvm_clear_async_pf_completion_queue(vcpu); |
6499 | kvm_async_pf_hash_reset(vcpu); | |
6500 | vcpu->arch.apf.halted = false; | |
3842d135 | 6501 | |
e9b11c17 ZX |
6502 | return kvm_x86_ops->vcpu_reset(vcpu); |
6503 | } | |
6504 | ||
10474ae8 | 6505 | int kvm_arch_hardware_enable(void *garbage) |
e9b11c17 | 6506 | { |
ca84d1a2 ZA |
6507 | struct kvm *kvm; |
6508 | struct kvm_vcpu *vcpu; | |
6509 | int i; | |
18863bdd AK |
6510 | |
6511 | kvm_shared_msr_cpu_online(); | |
ca84d1a2 ZA |
6512 | list_for_each_entry(kvm, &vm_list, vm_list) |
6513 | kvm_for_each_vcpu(i, vcpu, kvm) | |
6514 | if (vcpu->cpu == smp_processor_id()) | |
c285545f | 6515 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
10474ae8 | 6516 | return kvm_x86_ops->hardware_enable(garbage); |
e9b11c17 ZX |
6517 | } |
6518 | ||
6519 | void kvm_arch_hardware_disable(void *garbage) | |
6520 | { | |
6521 | kvm_x86_ops->hardware_disable(garbage); | |
3548bab5 | 6522 | drop_user_return_notifiers(garbage); |
e9b11c17 ZX |
6523 | } |
6524 | ||
6525 | int kvm_arch_hardware_setup(void) | |
6526 | { | |
6527 | return kvm_x86_ops->hardware_setup(); | |
6528 | } | |
6529 | ||
6530 | void kvm_arch_hardware_unsetup(void) | |
6531 | { | |
6532 | kvm_x86_ops->hardware_unsetup(); | |
6533 | } | |
6534 | ||
6535 | void kvm_arch_check_processor_compat(void *rtn) | |
6536 | { | |
6537 | kvm_x86_ops->check_processor_compatibility(rtn); | |
6538 | } | |
6539 | ||
6540 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) | |
6541 | { | |
6542 | struct page *page; | |
6543 | struct kvm *kvm; | |
6544 | int r; | |
6545 | ||
6546 | BUG_ON(vcpu->kvm == NULL); | |
6547 | kvm = vcpu->kvm; | |
6548 | ||
9aabc88f | 6549 | vcpu->arch.emulate_ctxt.ops = &emulate_ops; |
14dfe855 | 6550 | vcpu->arch.walk_mmu = &vcpu->arch.mmu; |
ad312c7c | 6551 | vcpu->arch.mmu.root_hpa = INVALID_PAGE; |
c30a358d | 6552 | vcpu->arch.mmu.translate_gpa = translate_gpa; |
02f59dc9 | 6553 | vcpu->arch.nested_mmu.translate_gpa = translate_nested_gpa; |
c5af89b6 | 6554 | if (!irqchip_in_kernel(kvm) || kvm_vcpu_is_bsp(vcpu)) |
a4535290 | 6555 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
e9b11c17 | 6556 | else |
a4535290 | 6557 | vcpu->arch.mp_state = KVM_MP_STATE_UNINITIALIZED; |
e9b11c17 ZX |
6558 | |
6559 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
6560 | if (!page) { | |
6561 | r = -ENOMEM; | |
6562 | goto fail; | |
6563 | } | |
ad312c7c | 6564 | vcpu->arch.pio_data = page_address(page); |
e9b11c17 | 6565 | |
1e993611 | 6566 | kvm_init_tsc_catchup(vcpu, max_tsc_khz); |
c285545f | 6567 | |
e9b11c17 ZX |
6568 | r = kvm_mmu_create(vcpu); |
6569 | if (r < 0) | |
6570 | goto fail_free_pio_data; | |
6571 | ||
6572 | if (irqchip_in_kernel(kvm)) { | |
6573 | r = kvm_create_lapic(vcpu); | |
6574 | if (r < 0) | |
6575 | goto fail_mmu_destroy; | |
6576 | } | |
6577 | ||
890ca9ae HY |
6578 | vcpu->arch.mce_banks = kzalloc(KVM_MAX_MCE_BANKS * sizeof(u64) * 4, |
6579 | GFP_KERNEL); | |
6580 | if (!vcpu->arch.mce_banks) { | |
6581 | r = -ENOMEM; | |
443c39bc | 6582 | goto fail_free_lapic; |
890ca9ae HY |
6583 | } |
6584 | vcpu->arch.mcg_cap = KVM_MAX_MCE_BANKS; | |
6585 | ||
f5f48ee1 SY |
6586 | if (!zalloc_cpumask_var(&vcpu->arch.wbinvd_dirty_mask, GFP_KERNEL)) |
6587 | goto fail_free_mce_banks; | |
6588 | ||
af585b92 GN |
6589 | kvm_async_pf_hash_reset(vcpu); |
6590 | ||
e9b11c17 | 6591 | return 0; |
f5f48ee1 SY |
6592 | fail_free_mce_banks: |
6593 | kfree(vcpu->arch.mce_banks); | |
443c39bc WY |
6594 | fail_free_lapic: |
6595 | kvm_free_lapic(vcpu); | |
e9b11c17 ZX |
6596 | fail_mmu_destroy: |
6597 | kvm_mmu_destroy(vcpu); | |
6598 | fail_free_pio_data: | |
ad312c7c | 6599 | free_page((unsigned long)vcpu->arch.pio_data); |
e9b11c17 ZX |
6600 | fail: |
6601 | return r; | |
6602 | } | |
6603 | ||
6604 | void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) | |
6605 | { | |
f656ce01 MT |
6606 | int idx; |
6607 | ||
36cb93fd | 6608 | kfree(vcpu->arch.mce_banks); |
e9b11c17 | 6609 | kvm_free_lapic(vcpu); |
f656ce01 | 6610 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
e9b11c17 | 6611 | kvm_mmu_destroy(vcpu); |
f656ce01 | 6612 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
ad312c7c | 6613 | free_page((unsigned long)vcpu->arch.pio_data); |
e9b11c17 | 6614 | } |
d19a9cd2 | 6615 | |
d89f5eff | 6616 | int kvm_arch_init_vm(struct kvm *kvm) |
d19a9cd2 | 6617 | { |
f05e70ac | 6618 | INIT_LIST_HEAD(&kvm->arch.active_mmu_pages); |
4d5c5d0f | 6619 | INIT_LIST_HEAD(&kvm->arch.assigned_dev_head); |
d19a9cd2 | 6620 | |
5550af4d SY |
6621 | /* Reserve bit 0 of irq_sources_bitmap for userspace irq source */ |
6622 | set_bit(KVM_USERSPACE_IRQ_SOURCE_ID, &kvm->arch.irq_sources_bitmap); | |
6623 | ||
038f8c11 | 6624 | raw_spin_lock_init(&kvm->arch.tsc_write_lock); |
53f658b3 | 6625 | |
d89f5eff | 6626 | return 0; |
d19a9cd2 ZX |
6627 | } |
6628 | ||
6629 | static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu) | |
6630 | { | |
6631 | vcpu_load(vcpu); | |
6632 | kvm_mmu_unload(vcpu); | |
6633 | vcpu_put(vcpu); | |
6634 | } | |
6635 | ||
6636 | static void kvm_free_vcpus(struct kvm *kvm) | |
6637 | { | |
6638 | unsigned int i; | |
988a2cae | 6639 | struct kvm_vcpu *vcpu; |
d19a9cd2 ZX |
6640 | |
6641 | /* | |
6642 | * Unpin any mmu pages first. | |
6643 | */ | |
af585b92 GN |
6644 | kvm_for_each_vcpu(i, vcpu, kvm) { |
6645 | kvm_clear_async_pf_completion_queue(vcpu); | |
988a2cae | 6646 | kvm_unload_vcpu_mmu(vcpu); |
af585b92 | 6647 | } |
988a2cae GN |
6648 | kvm_for_each_vcpu(i, vcpu, kvm) |
6649 | kvm_arch_vcpu_free(vcpu); | |
6650 | ||
6651 | mutex_lock(&kvm->lock); | |
6652 | for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) | |
6653 | kvm->vcpus[i] = NULL; | |
d19a9cd2 | 6654 | |
988a2cae GN |
6655 | atomic_set(&kvm->online_vcpus, 0); |
6656 | mutex_unlock(&kvm->lock); | |
d19a9cd2 ZX |
6657 | } |
6658 | ||
ad8ba2cd SY |
6659 | void kvm_arch_sync_events(struct kvm *kvm) |
6660 | { | |
ba4cef31 | 6661 | kvm_free_all_assigned_devices(kvm); |
aea924f6 | 6662 | kvm_free_pit(kvm); |
ad8ba2cd SY |
6663 | } |
6664 | ||
d19a9cd2 ZX |
6665 | void kvm_arch_destroy_vm(struct kvm *kvm) |
6666 | { | |
6eb55818 | 6667 | kvm_iommu_unmap_guest(kvm); |
d7deeeb0 ZX |
6668 | kfree(kvm->arch.vpic); |
6669 | kfree(kvm->arch.vioapic); | |
d19a9cd2 | 6670 | kvm_free_vcpus(kvm); |
3d45830c AK |
6671 | if (kvm->arch.apic_access_page) |
6672 | put_page(kvm->arch.apic_access_page); | |
b7ebfb05 SY |
6673 | if (kvm->arch.ept_identity_pagetable) |
6674 | put_page(kvm->arch.ept_identity_pagetable); | |
d19a9cd2 | 6675 | } |
0de10343 | 6676 | |
f7784b8e MT |
6677 | int kvm_arch_prepare_memory_region(struct kvm *kvm, |
6678 | struct kvm_memory_slot *memslot, | |
0de10343 | 6679 | struct kvm_memory_slot old, |
f7784b8e | 6680 | struct kvm_userspace_memory_region *mem, |
0de10343 ZX |
6681 | int user_alloc) |
6682 | { | |
f7784b8e | 6683 | int npages = memslot->npages; |
7ac77099 AK |
6684 | int map_flags = MAP_PRIVATE | MAP_ANONYMOUS; |
6685 | ||
6686 | /* Prevent internal slot pages from being moved by fork()/COW. */ | |
6687 | if (memslot->id >= KVM_MEMORY_SLOTS) | |
6688 | map_flags = MAP_SHARED | MAP_ANONYMOUS; | |
0de10343 ZX |
6689 | |
6690 | /*To keep backward compatibility with older userspace, | |
6691 | *x86 needs to hanlde !user_alloc case. | |
6692 | */ | |
6693 | if (!user_alloc) { | |
6694 | if (npages && !old.rmap) { | |
604b38ac AA |
6695 | unsigned long userspace_addr; |
6696 | ||
72dc67a6 | 6697 | down_write(¤t->mm->mmap_sem); |
604b38ac AA |
6698 | userspace_addr = do_mmap(NULL, 0, |
6699 | npages * PAGE_SIZE, | |
6700 | PROT_READ | PROT_WRITE, | |
7ac77099 | 6701 | map_flags, |
604b38ac | 6702 | 0); |
72dc67a6 | 6703 | up_write(¤t->mm->mmap_sem); |
0de10343 | 6704 | |
604b38ac AA |
6705 | if (IS_ERR((void *)userspace_addr)) |
6706 | return PTR_ERR((void *)userspace_addr); | |
6707 | ||
604b38ac | 6708 | memslot->userspace_addr = userspace_addr; |
0de10343 ZX |
6709 | } |
6710 | } | |
6711 | ||
f7784b8e MT |
6712 | |
6713 | return 0; | |
6714 | } | |
6715 | ||
6716 | void kvm_arch_commit_memory_region(struct kvm *kvm, | |
6717 | struct kvm_userspace_memory_region *mem, | |
6718 | struct kvm_memory_slot old, | |
6719 | int user_alloc) | |
6720 | { | |
6721 | ||
48c0e4e9 | 6722 | int nr_mmu_pages = 0, npages = mem->memory_size >> PAGE_SHIFT; |
f7784b8e MT |
6723 | |
6724 | if (!user_alloc && !old.user_alloc && old.rmap && !npages) { | |
6725 | int ret; | |
6726 | ||
6727 | down_write(¤t->mm->mmap_sem); | |
6728 | ret = do_munmap(current->mm, old.userspace_addr, | |
6729 | old.npages * PAGE_SIZE); | |
6730 | up_write(¤t->mm->mmap_sem); | |
6731 | if (ret < 0) | |
6732 | printk(KERN_WARNING | |
6733 | "kvm_vm_ioctl_set_memory_region: " | |
6734 | "failed to munmap memory\n"); | |
6735 | } | |
6736 | ||
48c0e4e9 XG |
6737 | if (!kvm->arch.n_requested_mmu_pages) |
6738 | nr_mmu_pages = kvm_mmu_calculate_mmu_pages(kvm); | |
6739 | ||
7c8a83b7 | 6740 | spin_lock(&kvm->mmu_lock); |
48c0e4e9 | 6741 | if (nr_mmu_pages) |
0de10343 | 6742 | kvm_mmu_change_mmu_pages(kvm, nr_mmu_pages); |
0de10343 | 6743 | kvm_mmu_slot_remove_write_access(kvm, mem->slot); |
7c8a83b7 | 6744 | spin_unlock(&kvm->mmu_lock); |
0de10343 | 6745 | } |
1d737c8a | 6746 | |
34d4cb8f MT |
6747 | void kvm_arch_flush_shadow(struct kvm *kvm) |
6748 | { | |
6749 | kvm_mmu_zap_all(kvm); | |
8986ecc0 | 6750 | kvm_reload_remote_mmus(kvm); |
34d4cb8f MT |
6751 | } |
6752 | ||
1d737c8a ZX |
6753 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
6754 | { | |
af585b92 GN |
6755 | return (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE && |
6756 | !vcpu->arch.apf.halted) | |
6757 | || !list_empty_careful(&vcpu->async_pf.done) | |
a1b37100 | 6758 | || vcpu->arch.mp_state == KVM_MP_STATE_SIPI_RECEIVED |
7460fb4a | 6759 | || atomic_read(&vcpu->arch.nmi_queued) || |
a1b37100 GN |
6760 | (kvm_arch_interrupt_allowed(vcpu) && |
6761 | kvm_cpu_has_interrupt(vcpu)); | |
1d737c8a | 6762 | } |
5736199a | 6763 | |
5736199a ZX |
6764 | void kvm_vcpu_kick(struct kvm_vcpu *vcpu) |
6765 | { | |
32f88400 MT |
6766 | int me; |
6767 | int cpu = vcpu->cpu; | |
5736199a ZX |
6768 | |
6769 | if (waitqueue_active(&vcpu->wq)) { | |
6770 | wake_up_interruptible(&vcpu->wq); | |
6771 | ++vcpu->stat.halt_wakeup; | |
6772 | } | |
32f88400 MT |
6773 | |
6774 | me = get_cpu(); | |
6775 | if (cpu != me && (unsigned)cpu < nr_cpu_ids && cpu_online(cpu)) | |
6b7e2d09 | 6776 | if (kvm_vcpu_exiting_guest_mode(vcpu) == IN_GUEST_MODE) |
32f88400 | 6777 | smp_send_reschedule(cpu); |
e9571ed5 | 6778 | put_cpu(); |
5736199a | 6779 | } |
78646121 GN |
6780 | |
6781 | int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu) | |
6782 | { | |
6783 | return kvm_x86_ops->interrupt_allowed(vcpu); | |
6784 | } | |
229456fc | 6785 | |
f92653ee JK |
6786 | bool kvm_is_linear_rip(struct kvm_vcpu *vcpu, unsigned long linear_rip) |
6787 | { | |
6788 | unsigned long current_rip = kvm_rip_read(vcpu) + | |
6789 | get_segment_base(vcpu, VCPU_SREG_CS); | |
6790 | ||
6791 | return current_rip == linear_rip; | |
6792 | } | |
6793 | EXPORT_SYMBOL_GPL(kvm_is_linear_rip); | |
6794 | ||
94fe45da JK |
6795 | unsigned long kvm_get_rflags(struct kvm_vcpu *vcpu) |
6796 | { | |
6797 | unsigned long rflags; | |
6798 | ||
6799 | rflags = kvm_x86_ops->get_rflags(vcpu); | |
6800 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) | |
c310bac5 | 6801 | rflags &= ~X86_EFLAGS_TF; |
94fe45da JK |
6802 | return rflags; |
6803 | } | |
6804 | EXPORT_SYMBOL_GPL(kvm_get_rflags); | |
6805 | ||
6806 | void kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags) | |
6807 | { | |
6808 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP && | |
f92653ee | 6809 | kvm_is_linear_rip(vcpu, vcpu->arch.singlestep_rip)) |
c310bac5 | 6810 | rflags |= X86_EFLAGS_TF; |
94fe45da | 6811 | kvm_x86_ops->set_rflags(vcpu, rflags); |
3842d135 | 6812 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
94fe45da JK |
6813 | } |
6814 | EXPORT_SYMBOL_GPL(kvm_set_rflags); | |
6815 | ||
56028d08 GN |
6816 | void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu, struct kvm_async_pf *work) |
6817 | { | |
6818 | int r; | |
6819 | ||
fb67e14f | 6820 | if ((vcpu->arch.mmu.direct_map != work->arch.direct_map) || |
c4806acd | 6821 | is_error_page(work->page)) |
56028d08 GN |
6822 | return; |
6823 | ||
6824 | r = kvm_mmu_reload(vcpu); | |
6825 | if (unlikely(r)) | |
6826 | return; | |
6827 | ||
fb67e14f XG |
6828 | if (!vcpu->arch.mmu.direct_map && |
6829 | work->arch.cr3 != vcpu->arch.mmu.get_cr3(vcpu)) | |
6830 | return; | |
6831 | ||
56028d08 GN |
6832 | vcpu->arch.mmu.page_fault(vcpu, work->gva, 0, true); |
6833 | } | |
6834 | ||
af585b92 GN |
6835 | static inline u32 kvm_async_pf_hash_fn(gfn_t gfn) |
6836 | { | |
6837 | return hash_32(gfn & 0xffffffff, order_base_2(ASYNC_PF_PER_VCPU)); | |
6838 | } | |
6839 | ||
6840 | static inline u32 kvm_async_pf_next_probe(u32 key) | |
6841 | { | |
6842 | return (key + 1) & (roundup_pow_of_two(ASYNC_PF_PER_VCPU) - 1); | |
6843 | } | |
6844 | ||
6845 | static void kvm_add_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn) | |
6846 | { | |
6847 | u32 key = kvm_async_pf_hash_fn(gfn); | |
6848 | ||
6849 | while (vcpu->arch.apf.gfns[key] != ~0) | |
6850 | key = kvm_async_pf_next_probe(key); | |
6851 | ||
6852 | vcpu->arch.apf.gfns[key] = gfn; | |
6853 | } | |
6854 | ||
6855 | static u32 kvm_async_pf_gfn_slot(struct kvm_vcpu *vcpu, gfn_t gfn) | |
6856 | { | |
6857 | int i; | |
6858 | u32 key = kvm_async_pf_hash_fn(gfn); | |
6859 | ||
6860 | for (i = 0; i < roundup_pow_of_two(ASYNC_PF_PER_VCPU) && | |
c7d28c24 XG |
6861 | (vcpu->arch.apf.gfns[key] != gfn && |
6862 | vcpu->arch.apf.gfns[key] != ~0); i++) | |
af585b92 GN |
6863 | key = kvm_async_pf_next_probe(key); |
6864 | ||
6865 | return key; | |
6866 | } | |
6867 | ||
6868 | bool kvm_find_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn) | |
6869 | { | |
6870 | return vcpu->arch.apf.gfns[kvm_async_pf_gfn_slot(vcpu, gfn)] == gfn; | |
6871 | } | |
6872 | ||
6873 | static void kvm_del_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn) | |
6874 | { | |
6875 | u32 i, j, k; | |
6876 | ||
6877 | i = j = kvm_async_pf_gfn_slot(vcpu, gfn); | |
6878 | while (true) { | |
6879 | vcpu->arch.apf.gfns[i] = ~0; | |
6880 | do { | |
6881 | j = kvm_async_pf_next_probe(j); | |
6882 | if (vcpu->arch.apf.gfns[j] == ~0) | |
6883 | return; | |
6884 | k = kvm_async_pf_hash_fn(vcpu->arch.apf.gfns[j]); | |
6885 | /* | |
6886 | * k lies cyclically in ]i,j] | |
6887 | * | i.k.j | | |
6888 | * |....j i.k.| or |.k..j i...| | |
6889 | */ | |
6890 | } while ((i <= j) ? (i < k && k <= j) : (i < k || k <= j)); | |
6891 | vcpu->arch.apf.gfns[i] = vcpu->arch.apf.gfns[j]; | |
6892 | i = j; | |
6893 | } | |
6894 | } | |
6895 | ||
7c90705b GN |
6896 | static int apf_put_user(struct kvm_vcpu *vcpu, u32 val) |
6897 | { | |
6898 | ||
6899 | return kvm_write_guest_cached(vcpu->kvm, &vcpu->arch.apf.data, &val, | |
6900 | sizeof(val)); | |
6901 | } | |
6902 | ||
af585b92 GN |
6903 | void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu, |
6904 | struct kvm_async_pf *work) | |
6905 | { | |
6389ee94 AK |
6906 | struct x86_exception fault; |
6907 | ||
7c90705b | 6908 | trace_kvm_async_pf_not_present(work->arch.token, work->gva); |
af585b92 | 6909 | kvm_add_async_pf_gfn(vcpu, work->arch.gfn); |
7c90705b GN |
6910 | |
6911 | if (!(vcpu->arch.apf.msr_val & KVM_ASYNC_PF_ENABLED) || | |
fc5f06fa GN |
6912 | (vcpu->arch.apf.send_user_only && |
6913 | kvm_x86_ops->get_cpl(vcpu) == 0)) | |
7c90705b GN |
6914 | kvm_make_request(KVM_REQ_APF_HALT, vcpu); |
6915 | else if (!apf_put_user(vcpu, KVM_PV_REASON_PAGE_NOT_PRESENT)) { | |
6389ee94 AK |
6916 | fault.vector = PF_VECTOR; |
6917 | fault.error_code_valid = true; | |
6918 | fault.error_code = 0; | |
6919 | fault.nested_page_fault = false; | |
6920 | fault.address = work->arch.token; | |
6921 | kvm_inject_page_fault(vcpu, &fault); | |
7c90705b | 6922 | } |
af585b92 GN |
6923 | } |
6924 | ||
6925 | void kvm_arch_async_page_present(struct kvm_vcpu *vcpu, | |
6926 | struct kvm_async_pf *work) | |
6927 | { | |
6389ee94 AK |
6928 | struct x86_exception fault; |
6929 | ||
7c90705b GN |
6930 | trace_kvm_async_pf_ready(work->arch.token, work->gva); |
6931 | if (is_error_page(work->page)) | |
6932 | work->arch.token = ~0; /* broadcast wakeup */ | |
6933 | else | |
6934 | kvm_del_async_pf_gfn(vcpu, work->arch.gfn); | |
6935 | ||
6936 | if ((vcpu->arch.apf.msr_val & KVM_ASYNC_PF_ENABLED) && | |
6937 | !apf_put_user(vcpu, KVM_PV_REASON_PAGE_READY)) { | |
6389ee94 AK |
6938 | fault.vector = PF_VECTOR; |
6939 | fault.error_code_valid = true; | |
6940 | fault.error_code = 0; | |
6941 | fault.nested_page_fault = false; | |
6942 | fault.address = work->arch.token; | |
6943 | kvm_inject_page_fault(vcpu, &fault); | |
7c90705b | 6944 | } |
e6d53e3b | 6945 | vcpu->arch.apf.halted = false; |
7c90705b GN |
6946 | } |
6947 | ||
6948 | bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu) | |
6949 | { | |
6950 | if (!(vcpu->arch.apf.msr_val & KVM_ASYNC_PF_ENABLED)) | |
6951 | return true; | |
6952 | else | |
6953 | return !kvm_event_needs_reinjection(vcpu) && | |
6954 | kvm_x86_ops->interrupt_allowed(vcpu); | |
af585b92 GN |
6955 | } |
6956 | ||
229456fc MT |
6957 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_exit); |
6958 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_inj_virq); | |
6959 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_page_fault); | |
6960 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_msr); | |
6961 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_cr); | |
0ac406de | 6962 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmrun); |
d8cabddf | 6963 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit); |
17897f36 | 6964 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit_inject); |
236649de | 6965 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intr_vmexit); |
ec1ff790 | 6966 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_invlpga); |
532a46b9 | 6967 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_skinit); |
2e554e8d | 6968 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intercepts); |