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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 | ||
5bb064dc ZX |
3463 | /* |
3464 | * Get (and clear) the dirty memory log for a memory slot. | |
3465 | */ | |
3466 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, | |
3467 | struct kvm_dirty_log *log) | |
3468 | { | |
7850ac54 | 3469 | int r; |
5bb064dc | 3470 | struct kvm_memory_slot *memslot; |
87bf6e7d | 3471 | unsigned long n; |
5bb064dc | 3472 | |
79fac95e | 3473 | mutex_lock(&kvm->slots_lock); |
5bb064dc | 3474 | |
b050b015 MT |
3475 | r = -EINVAL; |
3476 | if (log->slot >= KVM_MEMORY_SLOTS) | |
3477 | goto out; | |
3478 | ||
3479 | memslot = &kvm->memslots->memslots[log->slot]; | |
3480 | r = -ENOENT; | |
3481 | if (!memslot->dirty_bitmap) | |
3482 | goto out; | |
3483 | ||
87bf6e7d | 3484 | n = kvm_dirty_bitmap_bytes(memslot); |
b050b015 | 3485 | |
5bb064dc | 3486 | /* If nothing is dirty, don't bother messing with page tables. */ |
7850ac54 | 3487 | if (memslot->nr_dirty_pages) { |
b050b015 | 3488 | struct kvm_memslots *slots, *old_slots; |
914ebccd | 3489 | unsigned long *dirty_bitmap; |
b050b015 | 3490 | |
515a0127 TY |
3491 | dirty_bitmap = memslot->dirty_bitmap_head; |
3492 | if (memslot->dirty_bitmap == dirty_bitmap) | |
3493 | dirty_bitmap += n / sizeof(long); | |
914ebccd | 3494 | memset(dirty_bitmap, 0, n); |
b050b015 | 3495 | |
914ebccd TY |
3496 | r = -ENOMEM; |
3497 | slots = kzalloc(sizeof(struct kvm_memslots), GFP_KERNEL); | |
515a0127 | 3498 | if (!slots) |
914ebccd | 3499 | goto out; |
b050b015 MT |
3500 | memcpy(slots, kvm->memslots, sizeof(struct kvm_memslots)); |
3501 | slots->memslots[log->slot].dirty_bitmap = dirty_bitmap; | |
7850ac54 | 3502 | slots->memslots[log->slot].nr_dirty_pages = 0; |
49c7754c | 3503 | slots->generation++; |
b050b015 MT |
3504 | |
3505 | old_slots = kvm->memslots; | |
3506 | rcu_assign_pointer(kvm->memslots, slots); | |
3507 | synchronize_srcu_expedited(&kvm->srcu); | |
3508 | dirty_bitmap = old_slots->memslots[log->slot].dirty_bitmap; | |
3509 | kfree(old_slots); | |
914ebccd | 3510 | |
edde99ce MT |
3511 | spin_lock(&kvm->mmu_lock); |
3512 | kvm_mmu_slot_remove_write_access(kvm, log->slot); | |
3513 | spin_unlock(&kvm->mmu_lock); | |
3514 | ||
914ebccd | 3515 | r = -EFAULT; |
515a0127 | 3516 | if (copy_to_user(log->dirty_bitmap, dirty_bitmap, n)) |
914ebccd | 3517 | goto out; |
914ebccd TY |
3518 | } else { |
3519 | r = -EFAULT; | |
3520 | if (clear_user(log->dirty_bitmap, n)) | |
3521 | goto out; | |
5bb064dc | 3522 | } |
b050b015 | 3523 | |
5bb064dc ZX |
3524 | r = 0; |
3525 | out: | |
79fac95e | 3526 | mutex_unlock(&kvm->slots_lock); |
5bb064dc ZX |
3527 | return r; |
3528 | } | |
3529 | ||
1fe779f8 CO |
3530 | long kvm_arch_vm_ioctl(struct file *filp, |
3531 | unsigned int ioctl, unsigned long arg) | |
3532 | { | |
3533 | struct kvm *kvm = filp->private_data; | |
3534 | void __user *argp = (void __user *)arg; | |
367e1319 | 3535 | int r = -ENOTTY; |
f0d66275 DH |
3536 | /* |
3537 | * This union makes it completely explicit to gcc-3.x | |
3538 | * that these two variables' stack usage should be | |
3539 | * combined, not added together. | |
3540 | */ | |
3541 | union { | |
3542 | struct kvm_pit_state ps; | |
e9f42757 | 3543 | struct kvm_pit_state2 ps2; |
c5ff41ce | 3544 | struct kvm_pit_config pit_config; |
f0d66275 | 3545 | } u; |
1fe779f8 CO |
3546 | |
3547 | switch (ioctl) { | |
3548 | case KVM_SET_TSS_ADDR: | |
3549 | r = kvm_vm_ioctl_set_tss_addr(kvm, arg); | |
3550 | if (r < 0) | |
3551 | goto out; | |
3552 | break; | |
b927a3ce SY |
3553 | case KVM_SET_IDENTITY_MAP_ADDR: { |
3554 | u64 ident_addr; | |
3555 | ||
3556 | r = -EFAULT; | |
3557 | if (copy_from_user(&ident_addr, argp, sizeof ident_addr)) | |
3558 | goto out; | |
3559 | r = kvm_vm_ioctl_set_identity_map_addr(kvm, ident_addr); | |
3560 | if (r < 0) | |
3561 | goto out; | |
3562 | break; | |
3563 | } | |
1fe779f8 CO |
3564 | case KVM_SET_NR_MMU_PAGES: |
3565 | r = kvm_vm_ioctl_set_nr_mmu_pages(kvm, arg); | |
3566 | if (r) | |
3567 | goto out; | |
3568 | break; | |
3569 | case KVM_GET_NR_MMU_PAGES: | |
3570 | r = kvm_vm_ioctl_get_nr_mmu_pages(kvm); | |
3571 | break; | |
3ddea128 MT |
3572 | case KVM_CREATE_IRQCHIP: { |
3573 | struct kvm_pic *vpic; | |
3574 | ||
3575 | mutex_lock(&kvm->lock); | |
3576 | r = -EEXIST; | |
3577 | if (kvm->arch.vpic) | |
3578 | goto create_irqchip_unlock; | |
1fe779f8 | 3579 | r = -ENOMEM; |
3ddea128 MT |
3580 | vpic = kvm_create_pic(kvm); |
3581 | if (vpic) { | |
1fe779f8 CO |
3582 | r = kvm_ioapic_init(kvm); |
3583 | if (r) { | |
175504cd | 3584 | mutex_lock(&kvm->slots_lock); |
72bb2fcd | 3585 | kvm_io_bus_unregister_dev(kvm, KVM_PIO_BUS, |
743eeb0b SL |
3586 | &vpic->dev_master); |
3587 | kvm_io_bus_unregister_dev(kvm, KVM_PIO_BUS, | |
3588 | &vpic->dev_slave); | |
3589 | kvm_io_bus_unregister_dev(kvm, KVM_PIO_BUS, | |
3590 | &vpic->dev_eclr); | |
175504cd | 3591 | mutex_unlock(&kvm->slots_lock); |
3ddea128 MT |
3592 | kfree(vpic); |
3593 | goto create_irqchip_unlock; | |
1fe779f8 CO |
3594 | } |
3595 | } else | |
3ddea128 MT |
3596 | goto create_irqchip_unlock; |
3597 | smp_wmb(); | |
3598 | kvm->arch.vpic = vpic; | |
3599 | smp_wmb(); | |
399ec807 AK |
3600 | r = kvm_setup_default_irq_routing(kvm); |
3601 | if (r) { | |
175504cd | 3602 | mutex_lock(&kvm->slots_lock); |
3ddea128 | 3603 | mutex_lock(&kvm->irq_lock); |
72bb2fcd WY |
3604 | kvm_ioapic_destroy(kvm); |
3605 | kvm_destroy_pic(kvm); | |
3ddea128 | 3606 | mutex_unlock(&kvm->irq_lock); |
175504cd | 3607 | mutex_unlock(&kvm->slots_lock); |
399ec807 | 3608 | } |
3ddea128 MT |
3609 | create_irqchip_unlock: |
3610 | mutex_unlock(&kvm->lock); | |
1fe779f8 | 3611 | break; |
3ddea128 | 3612 | } |
7837699f | 3613 | case KVM_CREATE_PIT: |
c5ff41ce JK |
3614 | u.pit_config.flags = KVM_PIT_SPEAKER_DUMMY; |
3615 | goto create_pit; | |
3616 | case KVM_CREATE_PIT2: | |
3617 | r = -EFAULT; | |
3618 | if (copy_from_user(&u.pit_config, argp, | |
3619 | sizeof(struct kvm_pit_config))) | |
3620 | goto out; | |
3621 | create_pit: | |
79fac95e | 3622 | mutex_lock(&kvm->slots_lock); |
269e05e4 AK |
3623 | r = -EEXIST; |
3624 | if (kvm->arch.vpit) | |
3625 | goto create_pit_unlock; | |
7837699f | 3626 | r = -ENOMEM; |
c5ff41ce | 3627 | kvm->arch.vpit = kvm_create_pit(kvm, u.pit_config.flags); |
7837699f SY |
3628 | if (kvm->arch.vpit) |
3629 | r = 0; | |
269e05e4 | 3630 | create_pit_unlock: |
79fac95e | 3631 | mutex_unlock(&kvm->slots_lock); |
7837699f | 3632 | break; |
4925663a | 3633 | case KVM_IRQ_LINE_STATUS: |
1fe779f8 CO |
3634 | case KVM_IRQ_LINE: { |
3635 | struct kvm_irq_level irq_event; | |
3636 | ||
3637 | r = -EFAULT; | |
3638 | if (copy_from_user(&irq_event, argp, sizeof irq_event)) | |
3639 | goto out; | |
160d2f6c | 3640 | r = -ENXIO; |
1fe779f8 | 3641 | if (irqchip_in_kernel(kvm)) { |
4925663a | 3642 | __s32 status; |
4925663a GN |
3643 | status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID, |
3644 | irq_event.irq, irq_event.level); | |
4925663a | 3645 | if (ioctl == KVM_IRQ_LINE_STATUS) { |
160d2f6c | 3646 | r = -EFAULT; |
4925663a GN |
3647 | irq_event.status = status; |
3648 | if (copy_to_user(argp, &irq_event, | |
3649 | sizeof irq_event)) | |
3650 | goto out; | |
3651 | } | |
1fe779f8 CO |
3652 | r = 0; |
3653 | } | |
3654 | break; | |
3655 | } | |
3656 | case KVM_GET_IRQCHIP: { | |
3657 | /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ | |
f0d66275 | 3658 | struct kvm_irqchip *chip = kmalloc(sizeof(*chip), GFP_KERNEL); |
1fe779f8 | 3659 | |
f0d66275 DH |
3660 | r = -ENOMEM; |
3661 | if (!chip) | |
1fe779f8 | 3662 | goto out; |
f0d66275 DH |
3663 | r = -EFAULT; |
3664 | if (copy_from_user(chip, argp, sizeof *chip)) | |
3665 | goto get_irqchip_out; | |
1fe779f8 CO |
3666 | r = -ENXIO; |
3667 | if (!irqchip_in_kernel(kvm)) | |
f0d66275 DH |
3668 | goto get_irqchip_out; |
3669 | r = kvm_vm_ioctl_get_irqchip(kvm, chip); | |
1fe779f8 | 3670 | if (r) |
f0d66275 | 3671 | goto get_irqchip_out; |
1fe779f8 | 3672 | r = -EFAULT; |
f0d66275 DH |
3673 | if (copy_to_user(argp, chip, sizeof *chip)) |
3674 | goto get_irqchip_out; | |
1fe779f8 | 3675 | r = 0; |
f0d66275 DH |
3676 | get_irqchip_out: |
3677 | kfree(chip); | |
3678 | if (r) | |
3679 | goto out; | |
1fe779f8 CO |
3680 | break; |
3681 | } | |
3682 | case KVM_SET_IRQCHIP: { | |
3683 | /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ | |
f0d66275 | 3684 | struct kvm_irqchip *chip = kmalloc(sizeof(*chip), GFP_KERNEL); |
1fe779f8 | 3685 | |
f0d66275 DH |
3686 | r = -ENOMEM; |
3687 | if (!chip) | |
1fe779f8 | 3688 | goto out; |
f0d66275 DH |
3689 | r = -EFAULT; |
3690 | if (copy_from_user(chip, argp, sizeof *chip)) | |
3691 | goto set_irqchip_out; | |
1fe779f8 CO |
3692 | r = -ENXIO; |
3693 | if (!irqchip_in_kernel(kvm)) | |
f0d66275 DH |
3694 | goto set_irqchip_out; |
3695 | r = kvm_vm_ioctl_set_irqchip(kvm, chip); | |
1fe779f8 | 3696 | if (r) |
f0d66275 | 3697 | goto set_irqchip_out; |
1fe779f8 | 3698 | r = 0; |
f0d66275 DH |
3699 | set_irqchip_out: |
3700 | kfree(chip); | |
3701 | if (r) | |
3702 | goto out; | |
1fe779f8 CO |
3703 | break; |
3704 | } | |
e0f63cb9 | 3705 | case KVM_GET_PIT: { |
e0f63cb9 | 3706 | r = -EFAULT; |
f0d66275 | 3707 | if (copy_from_user(&u.ps, argp, sizeof(struct kvm_pit_state))) |
e0f63cb9 SY |
3708 | goto out; |
3709 | r = -ENXIO; | |
3710 | if (!kvm->arch.vpit) | |
3711 | goto out; | |
f0d66275 | 3712 | r = kvm_vm_ioctl_get_pit(kvm, &u.ps); |
e0f63cb9 SY |
3713 | if (r) |
3714 | goto out; | |
3715 | r = -EFAULT; | |
f0d66275 | 3716 | if (copy_to_user(argp, &u.ps, sizeof(struct kvm_pit_state))) |
e0f63cb9 SY |
3717 | goto out; |
3718 | r = 0; | |
3719 | break; | |
3720 | } | |
3721 | case KVM_SET_PIT: { | |
e0f63cb9 | 3722 | r = -EFAULT; |
f0d66275 | 3723 | if (copy_from_user(&u.ps, argp, sizeof u.ps)) |
e0f63cb9 SY |
3724 | goto out; |
3725 | r = -ENXIO; | |
3726 | if (!kvm->arch.vpit) | |
3727 | goto out; | |
f0d66275 | 3728 | r = kvm_vm_ioctl_set_pit(kvm, &u.ps); |
e0f63cb9 SY |
3729 | if (r) |
3730 | goto out; | |
3731 | r = 0; | |
3732 | break; | |
3733 | } | |
e9f42757 BK |
3734 | case KVM_GET_PIT2: { |
3735 | r = -ENXIO; | |
3736 | if (!kvm->arch.vpit) | |
3737 | goto out; | |
3738 | r = kvm_vm_ioctl_get_pit2(kvm, &u.ps2); | |
3739 | if (r) | |
3740 | goto out; | |
3741 | r = -EFAULT; | |
3742 | if (copy_to_user(argp, &u.ps2, sizeof(u.ps2))) | |
3743 | goto out; | |
3744 | r = 0; | |
3745 | break; | |
3746 | } | |
3747 | case KVM_SET_PIT2: { | |
3748 | r = -EFAULT; | |
3749 | if (copy_from_user(&u.ps2, argp, sizeof(u.ps2))) | |
3750 | goto out; | |
3751 | r = -ENXIO; | |
3752 | if (!kvm->arch.vpit) | |
3753 | goto out; | |
3754 | r = kvm_vm_ioctl_set_pit2(kvm, &u.ps2); | |
3755 | if (r) | |
3756 | goto out; | |
3757 | r = 0; | |
3758 | break; | |
3759 | } | |
52d939a0 MT |
3760 | case KVM_REINJECT_CONTROL: { |
3761 | struct kvm_reinject_control control; | |
3762 | r = -EFAULT; | |
3763 | if (copy_from_user(&control, argp, sizeof(control))) | |
3764 | goto out; | |
3765 | r = kvm_vm_ioctl_reinject(kvm, &control); | |
3766 | if (r) | |
3767 | goto out; | |
3768 | r = 0; | |
3769 | break; | |
3770 | } | |
ffde22ac ES |
3771 | case KVM_XEN_HVM_CONFIG: { |
3772 | r = -EFAULT; | |
3773 | if (copy_from_user(&kvm->arch.xen_hvm_config, argp, | |
3774 | sizeof(struct kvm_xen_hvm_config))) | |
3775 | goto out; | |
3776 | r = -EINVAL; | |
3777 | if (kvm->arch.xen_hvm_config.flags) | |
3778 | goto out; | |
3779 | r = 0; | |
3780 | break; | |
3781 | } | |
afbcf7ab | 3782 | case KVM_SET_CLOCK: { |
afbcf7ab GC |
3783 | struct kvm_clock_data user_ns; |
3784 | u64 now_ns; | |
3785 | s64 delta; | |
3786 | ||
3787 | r = -EFAULT; | |
3788 | if (copy_from_user(&user_ns, argp, sizeof(user_ns))) | |
3789 | goto out; | |
3790 | ||
3791 | r = -EINVAL; | |
3792 | if (user_ns.flags) | |
3793 | goto out; | |
3794 | ||
3795 | r = 0; | |
395c6b0a | 3796 | local_irq_disable(); |
759379dd | 3797 | now_ns = get_kernel_ns(); |
afbcf7ab | 3798 | delta = user_ns.clock - now_ns; |
395c6b0a | 3799 | local_irq_enable(); |
afbcf7ab GC |
3800 | kvm->arch.kvmclock_offset = delta; |
3801 | break; | |
3802 | } | |
3803 | case KVM_GET_CLOCK: { | |
afbcf7ab GC |
3804 | struct kvm_clock_data user_ns; |
3805 | u64 now_ns; | |
3806 | ||
395c6b0a | 3807 | local_irq_disable(); |
759379dd | 3808 | now_ns = get_kernel_ns(); |
afbcf7ab | 3809 | user_ns.clock = kvm->arch.kvmclock_offset + now_ns; |
395c6b0a | 3810 | local_irq_enable(); |
afbcf7ab | 3811 | user_ns.flags = 0; |
97e69aa6 | 3812 | memset(&user_ns.pad, 0, sizeof(user_ns.pad)); |
afbcf7ab GC |
3813 | |
3814 | r = -EFAULT; | |
3815 | if (copy_to_user(argp, &user_ns, sizeof(user_ns))) | |
3816 | goto out; | |
3817 | r = 0; | |
3818 | break; | |
3819 | } | |
3820 | ||
1fe779f8 CO |
3821 | default: |
3822 | ; | |
3823 | } | |
3824 | out: | |
3825 | return r; | |
3826 | } | |
3827 | ||
a16b043c | 3828 | static void kvm_init_msr_list(void) |
043405e1 CO |
3829 | { |
3830 | u32 dummy[2]; | |
3831 | unsigned i, j; | |
3832 | ||
e3267cbb GC |
3833 | /* skip the first msrs in the list. KVM-specific */ |
3834 | for (i = j = KVM_SAVE_MSRS_BEGIN; i < ARRAY_SIZE(msrs_to_save); i++) { | |
043405e1 CO |
3835 | if (rdmsr_safe(msrs_to_save[i], &dummy[0], &dummy[1]) < 0) |
3836 | continue; | |
3837 | if (j < i) | |
3838 | msrs_to_save[j] = msrs_to_save[i]; | |
3839 | j++; | |
3840 | } | |
3841 | num_msrs_to_save = j; | |
3842 | } | |
3843 | ||
bda9020e MT |
3844 | static int vcpu_mmio_write(struct kvm_vcpu *vcpu, gpa_t addr, int len, |
3845 | const void *v) | |
bbd9b64e | 3846 | { |
70252a10 AK |
3847 | int handled = 0; |
3848 | int n; | |
3849 | ||
3850 | do { | |
3851 | n = min(len, 8); | |
3852 | if (!(vcpu->arch.apic && | |
3853 | !kvm_iodevice_write(&vcpu->arch.apic->dev, addr, n, v)) | |
3854 | && kvm_io_bus_write(vcpu->kvm, KVM_MMIO_BUS, addr, n, v)) | |
3855 | break; | |
3856 | handled += n; | |
3857 | addr += n; | |
3858 | len -= n; | |
3859 | v += n; | |
3860 | } while (len); | |
bbd9b64e | 3861 | |
70252a10 | 3862 | return handled; |
bbd9b64e CO |
3863 | } |
3864 | ||
bda9020e | 3865 | static int vcpu_mmio_read(struct kvm_vcpu *vcpu, gpa_t addr, int len, void *v) |
bbd9b64e | 3866 | { |
70252a10 AK |
3867 | int handled = 0; |
3868 | int n; | |
3869 | ||
3870 | do { | |
3871 | n = min(len, 8); | |
3872 | if (!(vcpu->arch.apic && | |
3873 | !kvm_iodevice_read(&vcpu->arch.apic->dev, addr, n, v)) | |
3874 | && kvm_io_bus_read(vcpu->kvm, KVM_MMIO_BUS, addr, n, v)) | |
3875 | break; | |
3876 | trace_kvm_mmio(KVM_TRACE_MMIO_READ, n, addr, *(u64 *)v); | |
3877 | handled += n; | |
3878 | addr += n; | |
3879 | len -= n; | |
3880 | v += n; | |
3881 | } while (len); | |
bbd9b64e | 3882 | |
70252a10 | 3883 | return handled; |
bbd9b64e CO |
3884 | } |
3885 | ||
2dafc6c2 GN |
3886 | static void kvm_set_segment(struct kvm_vcpu *vcpu, |
3887 | struct kvm_segment *var, int seg) | |
3888 | { | |
3889 | kvm_x86_ops->set_segment(vcpu, var, seg); | |
3890 | } | |
3891 | ||
3892 | void kvm_get_segment(struct kvm_vcpu *vcpu, | |
3893 | struct kvm_segment *var, int seg) | |
3894 | { | |
3895 | kvm_x86_ops->get_segment(vcpu, var, seg); | |
3896 | } | |
3897 | ||
c30a358d JR |
3898 | static gpa_t translate_gpa(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access) |
3899 | { | |
3900 | return gpa; | |
3901 | } | |
3902 | ||
02f59dc9 JR |
3903 | static gpa_t translate_nested_gpa(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access) |
3904 | { | |
3905 | gpa_t t_gpa; | |
ab9ae313 | 3906 | struct x86_exception exception; |
02f59dc9 JR |
3907 | |
3908 | BUG_ON(!mmu_is_nested(vcpu)); | |
3909 | ||
3910 | /* NPT walks are always user-walks */ | |
3911 | access |= PFERR_USER_MASK; | |
ab9ae313 | 3912 | t_gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, gpa, access, &exception); |
02f59dc9 JR |
3913 | |
3914 | return t_gpa; | |
3915 | } | |
3916 | ||
ab9ae313 AK |
3917 | gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva, |
3918 | struct x86_exception *exception) | |
1871c602 GN |
3919 | { |
3920 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
ab9ae313 | 3921 | return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception); |
1871c602 GN |
3922 | } |
3923 | ||
ab9ae313 AK |
3924 | gpa_t kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu *vcpu, gva_t gva, |
3925 | struct x86_exception *exception) | |
1871c602 GN |
3926 | { |
3927 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
3928 | access |= PFERR_FETCH_MASK; | |
ab9ae313 | 3929 | return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception); |
1871c602 GN |
3930 | } |
3931 | ||
ab9ae313 AK |
3932 | gpa_t kvm_mmu_gva_to_gpa_write(struct kvm_vcpu *vcpu, gva_t gva, |
3933 | struct x86_exception *exception) | |
1871c602 GN |
3934 | { |
3935 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
3936 | access |= PFERR_WRITE_MASK; | |
ab9ae313 | 3937 | return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception); |
1871c602 GN |
3938 | } |
3939 | ||
3940 | /* uses this to access any guest's mapped memory without checking CPL */ | |
ab9ae313 AK |
3941 | gpa_t kvm_mmu_gva_to_gpa_system(struct kvm_vcpu *vcpu, gva_t gva, |
3942 | struct x86_exception *exception) | |
1871c602 | 3943 | { |
ab9ae313 | 3944 | return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, 0, exception); |
1871c602 GN |
3945 | } |
3946 | ||
3947 | static int kvm_read_guest_virt_helper(gva_t addr, void *val, unsigned int bytes, | |
3948 | struct kvm_vcpu *vcpu, u32 access, | |
bcc55cba | 3949 | struct x86_exception *exception) |
bbd9b64e CO |
3950 | { |
3951 | void *data = val; | |
10589a46 | 3952 | int r = X86EMUL_CONTINUE; |
bbd9b64e CO |
3953 | |
3954 | while (bytes) { | |
14dfe855 | 3955 | gpa_t gpa = vcpu->arch.walk_mmu->gva_to_gpa(vcpu, addr, access, |
ab9ae313 | 3956 | exception); |
bbd9b64e | 3957 | unsigned offset = addr & (PAGE_SIZE-1); |
77c2002e | 3958 | unsigned toread = min(bytes, (unsigned)PAGE_SIZE - offset); |
bbd9b64e CO |
3959 | int ret; |
3960 | ||
bcc55cba | 3961 | if (gpa == UNMAPPED_GVA) |
ab9ae313 | 3962 | return X86EMUL_PROPAGATE_FAULT; |
77c2002e | 3963 | ret = kvm_read_guest(vcpu->kvm, gpa, data, toread); |
10589a46 | 3964 | if (ret < 0) { |
c3cd7ffa | 3965 | r = X86EMUL_IO_NEEDED; |
10589a46 MT |
3966 | goto out; |
3967 | } | |
bbd9b64e | 3968 | |
77c2002e IE |
3969 | bytes -= toread; |
3970 | data += toread; | |
3971 | addr += toread; | |
bbd9b64e | 3972 | } |
10589a46 | 3973 | out: |
10589a46 | 3974 | return r; |
bbd9b64e | 3975 | } |
77c2002e | 3976 | |
1871c602 | 3977 | /* used for instruction fetching */ |
0f65dd70 AK |
3978 | static int kvm_fetch_guest_virt(struct x86_emulate_ctxt *ctxt, |
3979 | gva_t addr, void *val, unsigned int bytes, | |
bcc55cba | 3980 | struct x86_exception *exception) |
1871c602 | 3981 | { |
0f65dd70 | 3982 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
1871c602 | 3983 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; |
0f65dd70 | 3984 | |
1871c602 | 3985 | return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, |
bcc55cba AK |
3986 | access | PFERR_FETCH_MASK, |
3987 | exception); | |
1871c602 GN |
3988 | } |
3989 | ||
064aea77 | 3990 | int kvm_read_guest_virt(struct x86_emulate_ctxt *ctxt, |
0f65dd70 | 3991 | gva_t addr, void *val, unsigned int bytes, |
bcc55cba | 3992 | struct x86_exception *exception) |
1871c602 | 3993 | { |
0f65dd70 | 3994 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
1871c602 | 3995 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; |
0f65dd70 | 3996 | |
1871c602 | 3997 | return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, access, |
bcc55cba | 3998 | exception); |
1871c602 | 3999 | } |
064aea77 | 4000 | EXPORT_SYMBOL_GPL(kvm_read_guest_virt); |
1871c602 | 4001 | |
0f65dd70 AK |
4002 | static int kvm_read_guest_virt_system(struct x86_emulate_ctxt *ctxt, |
4003 | gva_t addr, void *val, unsigned int bytes, | |
bcc55cba | 4004 | struct x86_exception *exception) |
1871c602 | 4005 | { |
0f65dd70 | 4006 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
bcc55cba | 4007 | return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, 0, exception); |
1871c602 GN |
4008 | } |
4009 | ||
6a4d7550 | 4010 | int kvm_write_guest_virt_system(struct x86_emulate_ctxt *ctxt, |
0f65dd70 | 4011 | gva_t addr, void *val, |
2dafc6c2 | 4012 | unsigned int bytes, |
bcc55cba | 4013 | struct x86_exception *exception) |
77c2002e | 4014 | { |
0f65dd70 | 4015 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
77c2002e IE |
4016 | void *data = val; |
4017 | int r = X86EMUL_CONTINUE; | |
4018 | ||
4019 | while (bytes) { | |
14dfe855 JR |
4020 | gpa_t gpa = vcpu->arch.walk_mmu->gva_to_gpa(vcpu, addr, |
4021 | PFERR_WRITE_MASK, | |
ab9ae313 | 4022 | exception); |
77c2002e IE |
4023 | unsigned offset = addr & (PAGE_SIZE-1); |
4024 | unsigned towrite = min(bytes, (unsigned)PAGE_SIZE - offset); | |
4025 | int ret; | |
4026 | ||
bcc55cba | 4027 | if (gpa == UNMAPPED_GVA) |
ab9ae313 | 4028 | return X86EMUL_PROPAGATE_FAULT; |
77c2002e IE |
4029 | ret = kvm_write_guest(vcpu->kvm, gpa, data, towrite); |
4030 | if (ret < 0) { | |
c3cd7ffa | 4031 | r = X86EMUL_IO_NEEDED; |
77c2002e IE |
4032 | goto out; |
4033 | } | |
4034 | ||
4035 | bytes -= towrite; | |
4036 | data += towrite; | |
4037 | addr += towrite; | |
4038 | } | |
4039 | out: | |
4040 | return r; | |
4041 | } | |
6a4d7550 | 4042 | EXPORT_SYMBOL_GPL(kvm_write_guest_virt_system); |
77c2002e | 4043 | |
af7cc7d1 XG |
4044 | static int vcpu_mmio_gva_to_gpa(struct kvm_vcpu *vcpu, unsigned long gva, |
4045 | gpa_t *gpa, struct x86_exception *exception, | |
4046 | bool write) | |
4047 | { | |
4048 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
4049 | ||
bebb106a XG |
4050 | if (vcpu_match_mmio_gva(vcpu, gva) && |
4051 | check_write_user_access(vcpu, write, access, | |
4052 | vcpu->arch.access)) { | |
4053 | *gpa = vcpu->arch.mmio_gfn << PAGE_SHIFT | | |
4054 | (gva & (PAGE_SIZE - 1)); | |
4f022648 | 4055 | trace_vcpu_match_mmio(gva, *gpa, write, false); |
bebb106a XG |
4056 | return 1; |
4057 | } | |
4058 | ||
af7cc7d1 XG |
4059 | if (write) |
4060 | access |= PFERR_WRITE_MASK; | |
4061 | ||
4062 | *gpa = vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception); | |
4063 | ||
4064 | if (*gpa == UNMAPPED_GVA) | |
4065 | return -1; | |
4066 | ||
4067 | /* For APIC access vmexit */ | |
4068 | if ((*gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) | |
4069 | return 1; | |
4070 | ||
4f022648 XG |
4071 | if (vcpu_match_mmio_gpa(vcpu, *gpa)) { |
4072 | trace_vcpu_match_mmio(gva, *gpa, write, true); | |
bebb106a | 4073 | return 1; |
4f022648 | 4074 | } |
bebb106a | 4075 | |
af7cc7d1 XG |
4076 | return 0; |
4077 | } | |
4078 | ||
3200f405 | 4079 | int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa, |
bcc55cba | 4080 | const void *val, int bytes) |
bbd9b64e CO |
4081 | { |
4082 | int ret; | |
4083 | ||
4084 | ret = kvm_write_guest(vcpu->kvm, gpa, val, bytes); | |
9f811285 | 4085 | if (ret < 0) |
bbd9b64e | 4086 | return 0; |
f57f2ef5 | 4087 | kvm_mmu_pte_write(vcpu, gpa, val, bytes); |
bbd9b64e CO |
4088 | return 1; |
4089 | } | |
4090 | ||
77d197b2 XG |
4091 | struct read_write_emulator_ops { |
4092 | int (*read_write_prepare)(struct kvm_vcpu *vcpu, void *val, | |
4093 | int bytes); | |
4094 | int (*read_write_emulate)(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4095 | void *val, int bytes); | |
4096 | int (*read_write_mmio)(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4097 | int bytes, void *val); | |
4098 | int (*read_write_exit_mmio)(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4099 | void *val, int bytes); | |
4100 | bool write; | |
4101 | }; | |
4102 | ||
4103 | static int read_prepare(struct kvm_vcpu *vcpu, void *val, int bytes) | |
4104 | { | |
4105 | if (vcpu->mmio_read_completed) { | |
4106 | memcpy(val, vcpu->mmio_data, bytes); | |
4107 | trace_kvm_mmio(KVM_TRACE_MMIO_READ, bytes, | |
4108 | vcpu->mmio_phys_addr, *(u64 *)val); | |
4109 | vcpu->mmio_read_completed = 0; | |
4110 | return 1; | |
4111 | } | |
4112 | ||
4113 | return 0; | |
4114 | } | |
4115 | ||
4116 | static int read_emulate(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4117 | void *val, int bytes) | |
4118 | { | |
4119 | return !kvm_read_guest(vcpu->kvm, gpa, val, bytes); | |
4120 | } | |
4121 | ||
4122 | static int write_emulate(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4123 | void *val, int bytes) | |
4124 | { | |
4125 | return emulator_write_phys(vcpu, gpa, val, bytes); | |
4126 | } | |
4127 | ||
4128 | static int write_mmio(struct kvm_vcpu *vcpu, gpa_t gpa, int bytes, void *val) | |
4129 | { | |
4130 | trace_kvm_mmio(KVM_TRACE_MMIO_WRITE, bytes, gpa, *(u64 *)val); | |
4131 | return vcpu_mmio_write(vcpu, gpa, bytes, val); | |
4132 | } | |
4133 | ||
4134 | static int read_exit_mmio(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4135 | void *val, int bytes) | |
4136 | { | |
4137 | trace_kvm_mmio(KVM_TRACE_MMIO_READ_UNSATISFIED, bytes, gpa, 0); | |
4138 | return X86EMUL_IO_NEEDED; | |
4139 | } | |
4140 | ||
4141 | static int write_exit_mmio(struct kvm_vcpu *vcpu, gpa_t gpa, | |
4142 | void *val, int bytes) | |
4143 | { | |
4144 | memcpy(vcpu->mmio_data, val, bytes); | |
4145 | memcpy(vcpu->run->mmio.data, vcpu->mmio_data, 8); | |
4146 | return X86EMUL_CONTINUE; | |
4147 | } | |
4148 | ||
4149 | static struct read_write_emulator_ops read_emultor = { | |
4150 | .read_write_prepare = read_prepare, | |
4151 | .read_write_emulate = read_emulate, | |
4152 | .read_write_mmio = vcpu_mmio_read, | |
4153 | .read_write_exit_mmio = read_exit_mmio, | |
4154 | }; | |
4155 | ||
4156 | static struct read_write_emulator_ops write_emultor = { | |
4157 | .read_write_emulate = write_emulate, | |
4158 | .read_write_mmio = write_mmio, | |
4159 | .read_write_exit_mmio = write_exit_mmio, | |
4160 | .write = true, | |
4161 | }; | |
4162 | ||
22388a3c XG |
4163 | static int emulator_read_write_onepage(unsigned long addr, void *val, |
4164 | unsigned int bytes, | |
4165 | struct x86_exception *exception, | |
4166 | struct kvm_vcpu *vcpu, | |
4167 | struct read_write_emulator_ops *ops) | |
bbd9b64e | 4168 | { |
af7cc7d1 XG |
4169 | gpa_t gpa; |
4170 | int handled, ret; | |
22388a3c XG |
4171 | bool write = ops->write; |
4172 | ||
4173 | if (ops->read_write_prepare && | |
4174 | ops->read_write_prepare(vcpu, val, bytes)) | |
4175 | return X86EMUL_CONTINUE; | |
10589a46 | 4176 | |
22388a3c | 4177 | ret = vcpu_mmio_gva_to_gpa(vcpu, addr, &gpa, exception, write); |
bbd9b64e | 4178 | |
af7cc7d1 | 4179 | if (ret < 0) |
bbd9b64e | 4180 | return X86EMUL_PROPAGATE_FAULT; |
bbd9b64e CO |
4181 | |
4182 | /* For APIC access vmexit */ | |
af7cc7d1 | 4183 | if (ret) |
bbd9b64e CO |
4184 | goto mmio; |
4185 | ||
22388a3c | 4186 | if (ops->read_write_emulate(vcpu, gpa, val, bytes)) |
bbd9b64e CO |
4187 | return X86EMUL_CONTINUE; |
4188 | ||
4189 | mmio: | |
4190 | /* | |
4191 | * Is this MMIO handled locally? | |
4192 | */ | |
22388a3c | 4193 | handled = ops->read_write_mmio(vcpu, gpa, bytes, val); |
70252a10 | 4194 | if (handled == bytes) |
bbd9b64e | 4195 | return X86EMUL_CONTINUE; |
bbd9b64e | 4196 | |
70252a10 AK |
4197 | gpa += handled; |
4198 | bytes -= handled; | |
4199 | val += handled; | |
4200 | ||
bbd9b64e | 4201 | vcpu->mmio_needed = 1; |
411c35b7 GN |
4202 | vcpu->run->exit_reason = KVM_EXIT_MMIO; |
4203 | vcpu->run->mmio.phys_addr = vcpu->mmio_phys_addr = gpa; | |
cef4dea0 AK |
4204 | vcpu->mmio_size = bytes; |
4205 | vcpu->run->mmio.len = min(vcpu->mmio_size, 8); | |
22388a3c | 4206 | vcpu->run->mmio.is_write = vcpu->mmio_is_write = write; |
cef4dea0 | 4207 | vcpu->mmio_index = 0; |
bbd9b64e | 4208 | |
22388a3c | 4209 | return ops->read_write_exit_mmio(vcpu, gpa, val, bytes); |
bbd9b64e CO |
4210 | } |
4211 | ||
22388a3c XG |
4212 | int emulator_read_write(struct x86_emulate_ctxt *ctxt, unsigned long addr, |
4213 | void *val, unsigned int bytes, | |
4214 | struct x86_exception *exception, | |
4215 | struct read_write_emulator_ops *ops) | |
bbd9b64e | 4216 | { |
0f65dd70 AK |
4217 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
4218 | ||
bbd9b64e CO |
4219 | /* Crossing a page boundary? */ |
4220 | if (((addr + bytes - 1) ^ addr) & PAGE_MASK) { | |
4221 | int rc, now; | |
4222 | ||
4223 | now = -addr & ~PAGE_MASK; | |
22388a3c XG |
4224 | rc = emulator_read_write_onepage(addr, val, now, exception, |
4225 | vcpu, ops); | |
4226 | ||
bbd9b64e CO |
4227 | if (rc != X86EMUL_CONTINUE) |
4228 | return rc; | |
4229 | addr += now; | |
4230 | val += now; | |
4231 | bytes -= now; | |
4232 | } | |
22388a3c XG |
4233 | |
4234 | return emulator_read_write_onepage(addr, val, bytes, exception, | |
4235 | vcpu, ops); | |
4236 | } | |
4237 | ||
4238 | static int emulator_read_emulated(struct x86_emulate_ctxt *ctxt, | |
4239 | unsigned long addr, | |
4240 | void *val, | |
4241 | unsigned int bytes, | |
4242 | struct x86_exception *exception) | |
4243 | { | |
4244 | return emulator_read_write(ctxt, addr, val, bytes, | |
4245 | exception, &read_emultor); | |
4246 | } | |
4247 | ||
4248 | int emulator_write_emulated(struct x86_emulate_ctxt *ctxt, | |
4249 | unsigned long addr, | |
4250 | const void *val, | |
4251 | unsigned int bytes, | |
4252 | struct x86_exception *exception) | |
4253 | { | |
4254 | return emulator_read_write(ctxt, addr, (void *)val, bytes, | |
4255 | exception, &write_emultor); | |
bbd9b64e | 4256 | } |
bbd9b64e | 4257 | |
daea3e73 AK |
4258 | #define CMPXCHG_TYPE(t, ptr, old, new) \ |
4259 | (cmpxchg((t *)(ptr), *(t *)(old), *(t *)(new)) == *(t *)(old)) | |
4260 | ||
4261 | #ifdef CONFIG_X86_64 | |
4262 | # define CMPXCHG64(ptr, old, new) CMPXCHG_TYPE(u64, ptr, old, new) | |
4263 | #else | |
4264 | # define CMPXCHG64(ptr, old, new) \ | |
9749a6c0 | 4265 | (cmpxchg64((u64 *)(ptr), *(u64 *)(old), *(u64 *)(new)) == *(u64 *)(old)) |
daea3e73 AK |
4266 | #endif |
4267 | ||
0f65dd70 AK |
4268 | static int emulator_cmpxchg_emulated(struct x86_emulate_ctxt *ctxt, |
4269 | unsigned long addr, | |
bbd9b64e CO |
4270 | const void *old, |
4271 | const void *new, | |
4272 | unsigned int bytes, | |
0f65dd70 | 4273 | struct x86_exception *exception) |
bbd9b64e | 4274 | { |
0f65dd70 | 4275 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
daea3e73 AK |
4276 | gpa_t gpa; |
4277 | struct page *page; | |
4278 | char *kaddr; | |
4279 | bool exchanged; | |
2bacc55c | 4280 | |
daea3e73 AK |
4281 | /* guests cmpxchg8b have to be emulated atomically */ |
4282 | if (bytes > 8 || (bytes & (bytes - 1))) | |
4283 | goto emul_write; | |
10589a46 | 4284 | |
daea3e73 | 4285 | gpa = kvm_mmu_gva_to_gpa_write(vcpu, addr, NULL); |
2bacc55c | 4286 | |
daea3e73 AK |
4287 | if (gpa == UNMAPPED_GVA || |
4288 | (gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) | |
4289 | goto emul_write; | |
2bacc55c | 4290 | |
daea3e73 AK |
4291 | if (((gpa + bytes - 1) & PAGE_MASK) != (gpa & PAGE_MASK)) |
4292 | goto emul_write; | |
72dc67a6 | 4293 | |
daea3e73 | 4294 | page = gfn_to_page(vcpu->kvm, gpa >> PAGE_SHIFT); |
c19b8bd6 WY |
4295 | if (is_error_page(page)) { |
4296 | kvm_release_page_clean(page); | |
4297 | goto emul_write; | |
4298 | } | |
72dc67a6 | 4299 | |
daea3e73 AK |
4300 | kaddr = kmap_atomic(page, KM_USER0); |
4301 | kaddr += offset_in_page(gpa); | |
4302 | switch (bytes) { | |
4303 | case 1: | |
4304 | exchanged = CMPXCHG_TYPE(u8, kaddr, old, new); | |
4305 | break; | |
4306 | case 2: | |
4307 | exchanged = CMPXCHG_TYPE(u16, kaddr, old, new); | |
4308 | break; | |
4309 | case 4: | |
4310 | exchanged = CMPXCHG_TYPE(u32, kaddr, old, new); | |
4311 | break; | |
4312 | case 8: | |
4313 | exchanged = CMPXCHG64(kaddr, old, new); | |
4314 | break; | |
4315 | default: | |
4316 | BUG(); | |
2bacc55c | 4317 | } |
daea3e73 AK |
4318 | kunmap_atomic(kaddr, KM_USER0); |
4319 | kvm_release_page_dirty(page); | |
4320 | ||
4321 | if (!exchanged) | |
4322 | return X86EMUL_CMPXCHG_FAILED; | |
4323 | ||
f57f2ef5 | 4324 | kvm_mmu_pte_write(vcpu, gpa, new, bytes); |
8f6abd06 GN |
4325 | |
4326 | return X86EMUL_CONTINUE; | |
4a5f48f6 | 4327 | |
3200f405 | 4328 | emul_write: |
daea3e73 | 4329 | printk_once(KERN_WARNING "kvm: emulating exchange as write\n"); |
2bacc55c | 4330 | |
0f65dd70 | 4331 | return emulator_write_emulated(ctxt, addr, new, bytes, exception); |
bbd9b64e CO |
4332 | } |
4333 | ||
cf8f70bf GN |
4334 | static int kernel_pio(struct kvm_vcpu *vcpu, void *pd) |
4335 | { | |
4336 | /* TODO: String I/O for in kernel device */ | |
4337 | int r; | |
4338 | ||
4339 | if (vcpu->arch.pio.in) | |
4340 | r = kvm_io_bus_read(vcpu->kvm, KVM_PIO_BUS, vcpu->arch.pio.port, | |
4341 | vcpu->arch.pio.size, pd); | |
4342 | else | |
4343 | r = kvm_io_bus_write(vcpu->kvm, KVM_PIO_BUS, | |
4344 | vcpu->arch.pio.port, vcpu->arch.pio.size, | |
4345 | pd); | |
4346 | return r; | |
4347 | } | |
4348 | ||
6f6fbe98 XG |
4349 | static int emulator_pio_in_out(struct kvm_vcpu *vcpu, int size, |
4350 | unsigned short port, void *val, | |
4351 | unsigned int count, bool in) | |
cf8f70bf | 4352 | { |
6f6fbe98 | 4353 | trace_kvm_pio(!in, port, size, count); |
cf8f70bf GN |
4354 | |
4355 | vcpu->arch.pio.port = port; | |
6f6fbe98 | 4356 | vcpu->arch.pio.in = in; |
7972995b | 4357 | vcpu->arch.pio.count = count; |
cf8f70bf GN |
4358 | vcpu->arch.pio.size = size; |
4359 | ||
4360 | if (!kernel_pio(vcpu, vcpu->arch.pio_data)) { | |
7972995b | 4361 | vcpu->arch.pio.count = 0; |
cf8f70bf GN |
4362 | return 1; |
4363 | } | |
4364 | ||
4365 | vcpu->run->exit_reason = KVM_EXIT_IO; | |
6f6fbe98 | 4366 | vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT; |
cf8f70bf GN |
4367 | vcpu->run->io.size = size; |
4368 | vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE; | |
4369 | vcpu->run->io.count = count; | |
4370 | vcpu->run->io.port = port; | |
4371 | ||
4372 | return 0; | |
4373 | } | |
4374 | ||
6f6fbe98 XG |
4375 | static int emulator_pio_in_emulated(struct x86_emulate_ctxt *ctxt, |
4376 | int size, unsigned short port, void *val, | |
4377 | unsigned int count) | |
cf8f70bf | 4378 | { |
ca1d4a9e | 4379 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
6f6fbe98 | 4380 | int ret; |
ca1d4a9e | 4381 | |
6f6fbe98 XG |
4382 | if (vcpu->arch.pio.count) |
4383 | goto data_avail; | |
cf8f70bf | 4384 | |
6f6fbe98 XG |
4385 | ret = emulator_pio_in_out(vcpu, size, port, val, count, true); |
4386 | if (ret) { | |
4387 | data_avail: | |
4388 | memcpy(val, vcpu->arch.pio_data, size * count); | |
7972995b | 4389 | vcpu->arch.pio.count = 0; |
cf8f70bf GN |
4390 | return 1; |
4391 | } | |
4392 | ||
cf8f70bf GN |
4393 | return 0; |
4394 | } | |
4395 | ||
6f6fbe98 XG |
4396 | static int emulator_pio_out_emulated(struct x86_emulate_ctxt *ctxt, |
4397 | int size, unsigned short port, | |
4398 | const void *val, unsigned int count) | |
4399 | { | |
4400 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); | |
4401 | ||
4402 | memcpy(vcpu->arch.pio_data, val, size * count); | |
4403 | return emulator_pio_in_out(vcpu, size, port, (void *)val, count, false); | |
4404 | } | |
4405 | ||
bbd9b64e CO |
4406 | static unsigned long get_segment_base(struct kvm_vcpu *vcpu, int seg) |
4407 | { | |
4408 | return kvm_x86_ops->get_segment_base(vcpu, seg); | |
4409 | } | |
4410 | ||
3cb16fe7 | 4411 | static void emulator_invlpg(struct x86_emulate_ctxt *ctxt, ulong address) |
bbd9b64e | 4412 | { |
3cb16fe7 | 4413 | kvm_mmu_invlpg(emul_to_vcpu(ctxt), address); |
bbd9b64e CO |
4414 | } |
4415 | ||
f5f48ee1 SY |
4416 | int kvm_emulate_wbinvd(struct kvm_vcpu *vcpu) |
4417 | { | |
4418 | if (!need_emulate_wbinvd(vcpu)) | |
4419 | return X86EMUL_CONTINUE; | |
4420 | ||
4421 | if (kvm_x86_ops->has_wbinvd_exit()) { | |
2eec7343 JK |
4422 | int cpu = get_cpu(); |
4423 | ||
4424 | cpumask_set_cpu(cpu, vcpu->arch.wbinvd_dirty_mask); | |
f5f48ee1 SY |
4425 | smp_call_function_many(vcpu->arch.wbinvd_dirty_mask, |
4426 | wbinvd_ipi, NULL, 1); | |
2eec7343 | 4427 | put_cpu(); |
f5f48ee1 | 4428 | cpumask_clear(vcpu->arch.wbinvd_dirty_mask); |
2eec7343 JK |
4429 | } else |
4430 | wbinvd(); | |
f5f48ee1 SY |
4431 | return X86EMUL_CONTINUE; |
4432 | } | |
4433 | EXPORT_SYMBOL_GPL(kvm_emulate_wbinvd); | |
4434 | ||
bcaf5cc5 AK |
4435 | static void emulator_wbinvd(struct x86_emulate_ctxt *ctxt) |
4436 | { | |
4437 | kvm_emulate_wbinvd(emul_to_vcpu(ctxt)); | |
4438 | } | |
4439 | ||
717746e3 | 4440 | int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long *dest) |
bbd9b64e | 4441 | { |
717746e3 | 4442 | return _kvm_get_dr(emul_to_vcpu(ctxt), dr, dest); |
bbd9b64e CO |
4443 | } |
4444 | ||
717746e3 | 4445 | int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long value) |
bbd9b64e | 4446 | { |
338dbc97 | 4447 | |
717746e3 | 4448 | return __kvm_set_dr(emul_to_vcpu(ctxt), dr, value); |
bbd9b64e CO |
4449 | } |
4450 | ||
52a46617 | 4451 | static u64 mk_cr_64(u64 curr_cr, u32 new_val) |
5fdbf976 | 4452 | { |
52a46617 | 4453 | return (curr_cr & ~((1ULL << 32) - 1)) | new_val; |
5fdbf976 MT |
4454 | } |
4455 | ||
717746e3 | 4456 | static unsigned long emulator_get_cr(struct x86_emulate_ctxt *ctxt, int cr) |
bbd9b64e | 4457 | { |
717746e3 | 4458 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
52a46617 GN |
4459 | unsigned long value; |
4460 | ||
4461 | switch (cr) { | |
4462 | case 0: | |
4463 | value = kvm_read_cr0(vcpu); | |
4464 | break; | |
4465 | case 2: | |
4466 | value = vcpu->arch.cr2; | |
4467 | break; | |
4468 | case 3: | |
9f8fe504 | 4469 | value = kvm_read_cr3(vcpu); |
52a46617 GN |
4470 | break; |
4471 | case 4: | |
4472 | value = kvm_read_cr4(vcpu); | |
4473 | break; | |
4474 | case 8: | |
4475 | value = kvm_get_cr8(vcpu); | |
4476 | break; | |
4477 | default: | |
4478 | vcpu_printf(vcpu, "%s: unexpected cr %u\n", __func__, cr); | |
4479 | return 0; | |
4480 | } | |
4481 | ||
4482 | return value; | |
4483 | } | |
4484 | ||
717746e3 | 4485 | static int emulator_set_cr(struct x86_emulate_ctxt *ctxt, int cr, ulong val) |
52a46617 | 4486 | { |
717746e3 | 4487 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
0f12244f GN |
4488 | int res = 0; |
4489 | ||
52a46617 GN |
4490 | switch (cr) { |
4491 | case 0: | |
49a9b07e | 4492 | res = kvm_set_cr0(vcpu, mk_cr_64(kvm_read_cr0(vcpu), val)); |
52a46617 GN |
4493 | break; |
4494 | case 2: | |
4495 | vcpu->arch.cr2 = val; | |
4496 | break; | |
4497 | case 3: | |
2390218b | 4498 | res = kvm_set_cr3(vcpu, val); |
52a46617 GN |
4499 | break; |
4500 | case 4: | |
a83b29c6 | 4501 | res = kvm_set_cr4(vcpu, mk_cr_64(kvm_read_cr4(vcpu), val)); |
52a46617 GN |
4502 | break; |
4503 | case 8: | |
eea1cff9 | 4504 | res = kvm_set_cr8(vcpu, val); |
52a46617 GN |
4505 | break; |
4506 | default: | |
4507 | vcpu_printf(vcpu, "%s: unexpected cr %u\n", __func__, cr); | |
0f12244f | 4508 | res = -1; |
52a46617 | 4509 | } |
0f12244f GN |
4510 | |
4511 | return res; | |
52a46617 GN |
4512 | } |
4513 | ||
717746e3 | 4514 | static int emulator_get_cpl(struct x86_emulate_ctxt *ctxt) |
9c537244 | 4515 | { |
717746e3 | 4516 | return kvm_x86_ops->get_cpl(emul_to_vcpu(ctxt)); |
9c537244 GN |
4517 | } |
4518 | ||
4bff1e86 | 4519 | static void emulator_get_gdt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt) |
2dafc6c2 | 4520 | { |
4bff1e86 | 4521 | kvm_x86_ops->get_gdt(emul_to_vcpu(ctxt), dt); |
2dafc6c2 GN |
4522 | } |
4523 | ||
4bff1e86 | 4524 | static void emulator_get_idt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt) |
160ce1f1 | 4525 | { |
4bff1e86 | 4526 | kvm_x86_ops->get_idt(emul_to_vcpu(ctxt), dt); |
160ce1f1 MG |
4527 | } |
4528 | ||
1ac9d0cf AK |
4529 | static void emulator_set_gdt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt) |
4530 | { | |
4531 | kvm_x86_ops->set_gdt(emul_to_vcpu(ctxt), dt); | |
4532 | } | |
4533 | ||
4534 | static void emulator_set_idt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt) | |
4535 | { | |
4536 | kvm_x86_ops->set_idt(emul_to_vcpu(ctxt), dt); | |
4537 | } | |
4538 | ||
4bff1e86 AK |
4539 | static unsigned long emulator_get_cached_segment_base( |
4540 | struct x86_emulate_ctxt *ctxt, int seg) | |
5951c442 | 4541 | { |
4bff1e86 | 4542 | return get_segment_base(emul_to_vcpu(ctxt), seg); |
5951c442 GN |
4543 | } |
4544 | ||
1aa36616 AK |
4545 | static bool emulator_get_segment(struct x86_emulate_ctxt *ctxt, u16 *selector, |
4546 | struct desc_struct *desc, u32 *base3, | |
4547 | int seg) | |
2dafc6c2 GN |
4548 | { |
4549 | struct kvm_segment var; | |
4550 | ||
4bff1e86 | 4551 | kvm_get_segment(emul_to_vcpu(ctxt), &var, seg); |
1aa36616 | 4552 | *selector = var.selector; |
2dafc6c2 GN |
4553 | |
4554 | if (var.unusable) | |
4555 | return false; | |
4556 | ||
4557 | if (var.g) | |
4558 | var.limit >>= 12; | |
4559 | set_desc_limit(desc, var.limit); | |
4560 | set_desc_base(desc, (unsigned long)var.base); | |
5601d05b GN |
4561 | #ifdef CONFIG_X86_64 |
4562 | if (base3) | |
4563 | *base3 = var.base >> 32; | |
4564 | #endif | |
2dafc6c2 GN |
4565 | desc->type = var.type; |
4566 | desc->s = var.s; | |
4567 | desc->dpl = var.dpl; | |
4568 | desc->p = var.present; | |
4569 | desc->avl = var.avl; | |
4570 | desc->l = var.l; | |
4571 | desc->d = var.db; | |
4572 | desc->g = var.g; | |
4573 | ||
4574 | return true; | |
4575 | } | |
4576 | ||
1aa36616 AK |
4577 | static void emulator_set_segment(struct x86_emulate_ctxt *ctxt, u16 selector, |
4578 | struct desc_struct *desc, u32 base3, | |
4579 | int seg) | |
2dafc6c2 | 4580 | { |
4bff1e86 | 4581 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
2dafc6c2 GN |
4582 | struct kvm_segment var; |
4583 | ||
1aa36616 | 4584 | var.selector = selector; |
2dafc6c2 | 4585 | var.base = get_desc_base(desc); |
5601d05b GN |
4586 | #ifdef CONFIG_X86_64 |
4587 | var.base |= ((u64)base3) << 32; | |
4588 | #endif | |
2dafc6c2 GN |
4589 | var.limit = get_desc_limit(desc); |
4590 | if (desc->g) | |
4591 | var.limit = (var.limit << 12) | 0xfff; | |
4592 | var.type = desc->type; | |
4593 | var.present = desc->p; | |
4594 | var.dpl = desc->dpl; | |
4595 | var.db = desc->d; | |
4596 | var.s = desc->s; | |
4597 | var.l = desc->l; | |
4598 | var.g = desc->g; | |
4599 | var.avl = desc->avl; | |
4600 | var.present = desc->p; | |
4601 | var.unusable = !var.present; | |
4602 | var.padding = 0; | |
4603 | ||
4604 | kvm_set_segment(vcpu, &var, seg); | |
4605 | return; | |
4606 | } | |
4607 | ||
717746e3 AK |
4608 | static int emulator_get_msr(struct x86_emulate_ctxt *ctxt, |
4609 | u32 msr_index, u64 *pdata) | |
4610 | { | |
4611 | return kvm_get_msr(emul_to_vcpu(ctxt), msr_index, pdata); | |
4612 | } | |
4613 | ||
4614 | static int emulator_set_msr(struct x86_emulate_ctxt *ctxt, | |
4615 | u32 msr_index, u64 data) | |
4616 | { | |
4617 | return kvm_set_msr(emul_to_vcpu(ctxt), msr_index, data); | |
4618 | } | |
4619 | ||
6c3287f7 AK |
4620 | static void emulator_halt(struct x86_emulate_ctxt *ctxt) |
4621 | { | |
4622 | emul_to_vcpu(ctxt)->arch.halt_request = 1; | |
4623 | } | |
4624 | ||
5037f6f3 AK |
4625 | static void emulator_get_fpu(struct x86_emulate_ctxt *ctxt) |
4626 | { | |
4627 | preempt_disable(); | |
5197b808 | 4628 | kvm_load_guest_fpu(emul_to_vcpu(ctxt)); |
5037f6f3 AK |
4629 | /* |
4630 | * CR0.TS may reference the host fpu state, not the guest fpu state, | |
4631 | * so it may be clear at this point. | |
4632 | */ | |
4633 | clts(); | |
4634 | } | |
4635 | ||
4636 | static void emulator_put_fpu(struct x86_emulate_ctxt *ctxt) | |
4637 | { | |
4638 | preempt_enable(); | |
4639 | } | |
4640 | ||
2953538e | 4641 | static int emulator_intercept(struct x86_emulate_ctxt *ctxt, |
8a76d7f2 | 4642 | struct x86_instruction_info *info, |
c4f035c6 AK |
4643 | enum x86_intercept_stage stage) |
4644 | { | |
2953538e | 4645 | return kvm_x86_ops->check_intercept(emul_to_vcpu(ctxt), info, stage); |
c4f035c6 AK |
4646 | } |
4647 | ||
14af3f3c | 4648 | static struct x86_emulate_ops emulate_ops = { |
1871c602 | 4649 | .read_std = kvm_read_guest_virt_system, |
2dafc6c2 | 4650 | .write_std = kvm_write_guest_virt_system, |
1871c602 | 4651 | .fetch = kvm_fetch_guest_virt, |
bbd9b64e CO |
4652 | .read_emulated = emulator_read_emulated, |
4653 | .write_emulated = emulator_write_emulated, | |
4654 | .cmpxchg_emulated = emulator_cmpxchg_emulated, | |
3cb16fe7 | 4655 | .invlpg = emulator_invlpg, |
cf8f70bf GN |
4656 | .pio_in_emulated = emulator_pio_in_emulated, |
4657 | .pio_out_emulated = emulator_pio_out_emulated, | |
1aa36616 AK |
4658 | .get_segment = emulator_get_segment, |
4659 | .set_segment = emulator_set_segment, | |
5951c442 | 4660 | .get_cached_segment_base = emulator_get_cached_segment_base, |
2dafc6c2 | 4661 | .get_gdt = emulator_get_gdt, |
160ce1f1 | 4662 | .get_idt = emulator_get_idt, |
1ac9d0cf AK |
4663 | .set_gdt = emulator_set_gdt, |
4664 | .set_idt = emulator_set_idt, | |
52a46617 GN |
4665 | .get_cr = emulator_get_cr, |
4666 | .set_cr = emulator_set_cr, | |
9c537244 | 4667 | .cpl = emulator_get_cpl, |
35aa5375 GN |
4668 | .get_dr = emulator_get_dr, |
4669 | .set_dr = emulator_set_dr, | |
717746e3 AK |
4670 | .set_msr = emulator_set_msr, |
4671 | .get_msr = emulator_get_msr, | |
6c3287f7 | 4672 | .halt = emulator_halt, |
bcaf5cc5 | 4673 | .wbinvd = emulator_wbinvd, |
d6aa1000 | 4674 | .fix_hypercall = emulator_fix_hypercall, |
5037f6f3 AK |
4675 | .get_fpu = emulator_get_fpu, |
4676 | .put_fpu = emulator_put_fpu, | |
c4f035c6 | 4677 | .intercept = emulator_intercept, |
bbd9b64e CO |
4678 | }; |
4679 | ||
5fdbf976 MT |
4680 | static void cache_all_regs(struct kvm_vcpu *vcpu) |
4681 | { | |
4682 | kvm_register_read(vcpu, VCPU_REGS_RAX); | |
4683 | kvm_register_read(vcpu, VCPU_REGS_RSP); | |
4684 | kvm_register_read(vcpu, VCPU_REGS_RIP); | |
4685 | vcpu->arch.regs_dirty = ~0; | |
4686 | } | |
4687 | ||
95cb2295 GN |
4688 | static void toggle_interruptibility(struct kvm_vcpu *vcpu, u32 mask) |
4689 | { | |
4690 | u32 int_shadow = kvm_x86_ops->get_interrupt_shadow(vcpu, mask); | |
4691 | /* | |
4692 | * an sti; sti; sequence only disable interrupts for the first | |
4693 | * instruction. So, if the last instruction, be it emulated or | |
4694 | * not, left the system with the INT_STI flag enabled, it | |
4695 | * means that the last instruction is an sti. We should not | |
4696 | * leave the flag on in this case. The same goes for mov ss | |
4697 | */ | |
4698 | if (!(int_shadow & mask)) | |
4699 | kvm_x86_ops->set_interrupt_shadow(vcpu, mask); | |
4700 | } | |
4701 | ||
54b8486f GN |
4702 | static void inject_emulated_exception(struct kvm_vcpu *vcpu) |
4703 | { | |
4704 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; | |
da9cb575 | 4705 | if (ctxt->exception.vector == PF_VECTOR) |
6389ee94 | 4706 | kvm_propagate_fault(vcpu, &ctxt->exception); |
da9cb575 AK |
4707 | else if (ctxt->exception.error_code_valid) |
4708 | kvm_queue_exception_e(vcpu, ctxt->exception.vector, | |
4709 | ctxt->exception.error_code); | |
54b8486f | 4710 | else |
da9cb575 | 4711 | kvm_queue_exception(vcpu, ctxt->exception.vector); |
54b8486f GN |
4712 | } |
4713 | ||
9dac77fa | 4714 | static void init_decode_cache(struct x86_emulate_ctxt *ctxt, |
b5c9ff73 TY |
4715 | const unsigned long *regs) |
4716 | { | |
9dac77fa AK |
4717 | memset(&ctxt->twobyte, 0, |
4718 | (void *)&ctxt->regs - (void *)&ctxt->twobyte); | |
4719 | memcpy(ctxt->regs, regs, sizeof(ctxt->regs)); | |
b5c9ff73 | 4720 | |
9dac77fa AK |
4721 | ctxt->fetch.start = 0; |
4722 | ctxt->fetch.end = 0; | |
4723 | ctxt->io_read.pos = 0; | |
4724 | ctxt->io_read.end = 0; | |
4725 | ctxt->mem_read.pos = 0; | |
4726 | ctxt->mem_read.end = 0; | |
b5c9ff73 TY |
4727 | } |
4728 | ||
8ec4722d MG |
4729 | static void init_emulate_ctxt(struct kvm_vcpu *vcpu) |
4730 | { | |
adf52235 | 4731 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; |
8ec4722d MG |
4732 | int cs_db, cs_l; |
4733 | ||
2aab2c5b GN |
4734 | /* |
4735 | * TODO: fix emulate.c to use guest_read/write_register | |
4736 | * instead of direct ->regs accesses, can save hundred cycles | |
4737 | * on Intel for instructions that don't read/change RSP, for | |
4738 | * for example. | |
4739 | */ | |
8ec4722d MG |
4740 | cache_all_regs(vcpu); |
4741 | ||
4742 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); | |
4743 | ||
adf52235 TY |
4744 | ctxt->eflags = kvm_get_rflags(vcpu); |
4745 | ctxt->eip = kvm_rip_read(vcpu); | |
4746 | ctxt->mode = (!is_protmode(vcpu)) ? X86EMUL_MODE_REAL : | |
4747 | (ctxt->eflags & X86_EFLAGS_VM) ? X86EMUL_MODE_VM86 : | |
4748 | cs_l ? X86EMUL_MODE_PROT64 : | |
4749 | cs_db ? X86EMUL_MODE_PROT32 : | |
4750 | X86EMUL_MODE_PROT16; | |
4751 | ctxt->guest_mode = is_guest_mode(vcpu); | |
4752 | ||
9dac77fa | 4753 | init_decode_cache(ctxt, vcpu->arch.regs); |
7ae441ea | 4754 | vcpu->arch.emulate_regs_need_sync_from_vcpu = false; |
8ec4722d MG |
4755 | } |
4756 | ||
71f9833b | 4757 | int kvm_inject_realmode_interrupt(struct kvm_vcpu *vcpu, int irq, int inc_eip) |
63995653 | 4758 | { |
9d74191a | 4759 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; |
63995653 MG |
4760 | int ret; |
4761 | ||
4762 | init_emulate_ctxt(vcpu); | |
4763 | ||
9dac77fa AK |
4764 | ctxt->op_bytes = 2; |
4765 | ctxt->ad_bytes = 2; | |
4766 | ctxt->_eip = ctxt->eip + inc_eip; | |
9d74191a | 4767 | ret = emulate_int_real(ctxt, irq); |
63995653 MG |
4768 | |
4769 | if (ret != X86EMUL_CONTINUE) | |
4770 | return EMULATE_FAIL; | |
4771 | ||
9dac77fa AK |
4772 | ctxt->eip = ctxt->_eip; |
4773 | memcpy(vcpu->arch.regs, ctxt->regs, sizeof ctxt->regs); | |
9d74191a TY |
4774 | kvm_rip_write(vcpu, ctxt->eip); |
4775 | kvm_set_rflags(vcpu, ctxt->eflags); | |
63995653 MG |
4776 | |
4777 | if (irq == NMI_VECTOR) | |
7460fb4a | 4778 | vcpu->arch.nmi_pending = 0; |
63995653 MG |
4779 | else |
4780 | vcpu->arch.interrupt.pending = false; | |
4781 | ||
4782 | return EMULATE_DONE; | |
4783 | } | |
4784 | EXPORT_SYMBOL_GPL(kvm_inject_realmode_interrupt); | |
4785 | ||
6d77dbfc GN |
4786 | static int handle_emulation_failure(struct kvm_vcpu *vcpu) |
4787 | { | |
fc3a9157 JR |
4788 | int r = EMULATE_DONE; |
4789 | ||
6d77dbfc GN |
4790 | ++vcpu->stat.insn_emulation_fail; |
4791 | trace_kvm_emulate_insn_failed(vcpu); | |
fc3a9157 JR |
4792 | if (!is_guest_mode(vcpu)) { |
4793 | vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR; | |
4794 | vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION; | |
4795 | vcpu->run->internal.ndata = 0; | |
4796 | r = EMULATE_FAIL; | |
4797 | } | |
6d77dbfc | 4798 | kvm_queue_exception(vcpu, UD_VECTOR); |
fc3a9157 JR |
4799 | |
4800 | return r; | |
6d77dbfc GN |
4801 | } |
4802 | ||
a6f177ef GN |
4803 | static bool reexecute_instruction(struct kvm_vcpu *vcpu, gva_t gva) |
4804 | { | |
4805 | gpa_t gpa; | |
4806 | ||
68be0803 GN |
4807 | if (tdp_enabled) |
4808 | return false; | |
4809 | ||
a6f177ef GN |
4810 | /* |
4811 | * if emulation was due to access to shadowed page table | |
4812 | * and it failed try to unshadow page and re-entetr the | |
4813 | * guest to let CPU execute the instruction. | |
4814 | */ | |
4815 | if (kvm_mmu_unprotect_page_virt(vcpu, gva)) | |
4816 | return true; | |
4817 | ||
4818 | gpa = kvm_mmu_gva_to_gpa_system(vcpu, gva, NULL); | |
4819 | ||
4820 | if (gpa == UNMAPPED_GVA) | |
4821 | return true; /* let cpu generate fault */ | |
4822 | ||
4823 | if (!kvm_is_error_hva(gfn_to_hva(vcpu->kvm, gpa >> PAGE_SHIFT))) | |
4824 | return true; | |
4825 | ||
4826 | return false; | |
4827 | } | |
4828 | ||
1cb3f3ae XG |
4829 | static bool retry_instruction(struct x86_emulate_ctxt *ctxt, |
4830 | unsigned long cr2, int emulation_type) | |
4831 | { | |
4832 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); | |
4833 | unsigned long last_retry_eip, last_retry_addr, gpa = cr2; | |
4834 | ||
4835 | last_retry_eip = vcpu->arch.last_retry_eip; | |
4836 | last_retry_addr = vcpu->arch.last_retry_addr; | |
4837 | ||
4838 | /* | |
4839 | * If the emulation is caused by #PF and it is non-page_table | |
4840 | * writing instruction, it means the VM-EXIT is caused by shadow | |
4841 | * page protected, we can zap the shadow page and retry this | |
4842 | * instruction directly. | |
4843 | * | |
4844 | * Note: if the guest uses a non-page-table modifying instruction | |
4845 | * on the PDE that points to the instruction, then we will unmap | |
4846 | * the instruction and go to an infinite loop. So, we cache the | |
4847 | * last retried eip and the last fault address, if we meet the eip | |
4848 | * and the address again, we can break out of the potential infinite | |
4849 | * loop. | |
4850 | */ | |
4851 | vcpu->arch.last_retry_eip = vcpu->arch.last_retry_addr = 0; | |
4852 | ||
4853 | if (!(emulation_type & EMULTYPE_RETRY)) | |
4854 | return false; | |
4855 | ||
4856 | if (x86_page_table_writing_insn(ctxt)) | |
4857 | return false; | |
4858 | ||
4859 | if (ctxt->eip == last_retry_eip && last_retry_addr == cr2) | |
4860 | return false; | |
4861 | ||
4862 | vcpu->arch.last_retry_eip = ctxt->eip; | |
4863 | vcpu->arch.last_retry_addr = cr2; | |
4864 | ||
4865 | if (!vcpu->arch.mmu.direct_map) | |
4866 | gpa = kvm_mmu_gva_to_gpa_write(vcpu, cr2, NULL); | |
4867 | ||
4868 | kvm_mmu_unprotect_page(vcpu->kvm, gpa >> PAGE_SHIFT); | |
4869 | ||
4870 | return true; | |
4871 | } | |
4872 | ||
51d8b661 AP |
4873 | int x86_emulate_instruction(struct kvm_vcpu *vcpu, |
4874 | unsigned long cr2, | |
dc25e89e AP |
4875 | int emulation_type, |
4876 | void *insn, | |
4877 | int insn_len) | |
bbd9b64e | 4878 | { |
95cb2295 | 4879 | int r; |
9d74191a | 4880 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; |
7ae441ea | 4881 | bool writeback = true; |
bbd9b64e | 4882 | |
26eef70c | 4883 | kvm_clear_exception_queue(vcpu); |
8d7d8102 | 4884 | |
571008da | 4885 | if (!(emulation_type & EMULTYPE_NO_DECODE)) { |
8ec4722d | 4886 | init_emulate_ctxt(vcpu); |
9d74191a TY |
4887 | ctxt->interruptibility = 0; |
4888 | ctxt->have_exception = false; | |
4889 | ctxt->perm_ok = false; | |
bbd9b64e | 4890 | |
9d74191a | 4891 | ctxt->only_vendor_specific_insn |
4005996e AK |
4892 | = emulation_type & EMULTYPE_TRAP_UD; |
4893 | ||
9d74191a | 4894 | r = x86_decode_insn(ctxt, insn, insn_len); |
bbd9b64e | 4895 | |
e46479f8 | 4896 | trace_kvm_emulate_insn_start(vcpu); |
f2b5756b | 4897 | ++vcpu->stat.insn_emulation; |
1d2887e2 | 4898 | if (r != EMULATION_OK) { |
4005996e AK |
4899 | if (emulation_type & EMULTYPE_TRAP_UD) |
4900 | return EMULATE_FAIL; | |
a6f177ef | 4901 | if (reexecute_instruction(vcpu, cr2)) |
bbd9b64e | 4902 | return EMULATE_DONE; |
6d77dbfc GN |
4903 | if (emulation_type & EMULTYPE_SKIP) |
4904 | return EMULATE_FAIL; | |
4905 | return handle_emulation_failure(vcpu); | |
bbd9b64e CO |
4906 | } |
4907 | } | |
4908 | ||
ba8afb6b | 4909 | if (emulation_type & EMULTYPE_SKIP) { |
9dac77fa | 4910 | kvm_rip_write(vcpu, ctxt->_eip); |
ba8afb6b GN |
4911 | return EMULATE_DONE; |
4912 | } | |
4913 | ||
1cb3f3ae XG |
4914 | if (retry_instruction(ctxt, cr2, emulation_type)) |
4915 | return EMULATE_DONE; | |
4916 | ||
7ae441ea | 4917 | /* this is needed for vmware backdoor interface to work since it |
4d2179e1 | 4918 | changes registers values during IO operation */ |
7ae441ea GN |
4919 | if (vcpu->arch.emulate_regs_need_sync_from_vcpu) { |
4920 | vcpu->arch.emulate_regs_need_sync_from_vcpu = false; | |
9dac77fa | 4921 | memcpy(ctxt->regs, vcpu->arch.regs, sizeof ctxt->regs); |
7ae441ea | 4922 | } |
4d2179e1 | 4923 | |
5cd21917 | 4924 | restart: |
9d74191a | 4925 | r = x86_emulate_insn(ctxt); |
bbd9b64e | 4926 | |
775fde86 JR |
4927 | if (r == EMULATION_INTERCEPTED) |
4928 | return EMULATE_DONE; | |
4929 | ||
d2ddd1c4 | 4930 | if (r == EMULATION_FAILED) { |
a6f177ef | 4931 | if (reexecute_instruction(vcpu, cr2)) |
c3cd7ffa GN |
4932 | return EMULATE_DONE; |
4933 | ||
6d77dbfc | 4934 | return handle_emulation_failure(vcpu); |
bbd9b64e CO |
4935 | } |
4936 | ||
9d74191a | 4937 | if (ctxt->have_exception) { |
54b8486f | 4938 | inject_emulated_exception(vcpu); |
d2ddd1c4 GN |
4939 | r = EMULATE_DONE; |
4940 | } else if (vcpu->arch.pio.count) { | |
3457e419 GN |
4941 | if (!vcpu->arch.pio.in) |
4942 | vcpu->arch.pio.count = 0; | |
7ae441ea GN |
4943 | else |
4944 | writeback = false; | |
e85d28f8 | 4945 | r = EMULATE_DO_MMIO; |
7ae441ea GN |
4946 | } else if (vcpu->mmio_needed) { |
4947 | if (!vcpu->mmio_is_write) | |
4948 | writeback = false; | |
e85d28f8 | 4949 | r = EMULATE_DO_MMIO; |
7ae441ea | 4950 | } else if (r == EMULATION_RESTART) |
5cd21917 | 4951 | goto restart; |
d2ddd1c4 GN |
4952 | else |
4953 | r = EMULATE_DONE; | |
f850e2e6 | 4954 | |
7ae441ea | 4955 | if (writeback) { |
9d74191a TY |
4956 | toggle_interruptibility(vcpu, ctxt->interruptibility); |
4957 | kvm_set_rflags(vcpu, ctxt->eflags); | |
7ae441ea | 4958 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
9dac77fa | 4959 | memcpy(vcpu->arch.regs, ctxt->regs, sizeof ctxt->regs); |
7ae441ea | 4960 | vcpu->arch.emulate_regs_need_sync_to_vcpu = false; |
9d74191a | 4961 | kvm_rip_write(vcpu, ctxt->eip); |
7ae441ea GN |
4962 | } else |
4963 | vcpu->arch.emulate_regs_need_sync_to_vcpu = true; | |
e85d28f8 GN |
4964 | |
4965 | return r; | |
de7d789a | 4966 | } |
51d8b661 | 4967 | EXPORT_SYMBOL_GPL(x86_emulate_instruction); |
de7d789a | 4968 | |
cf8f70bf | 4969 | int kvm_fast_pio_out(struct kvm_vcpu *vcpu, int size, unsigned short port) |
de7d789a | 4970 | { |
cf8f70bf | 4971 | unsigned long val = kvm_register_read(vcpu, VCPU_REGS_RAX); |
ca1d4a9e AK |
4972 | int ret = emulator_pio_out_emulated(&vcpu->arch.emulate_ctxt, |
4973 | size, port, &val, 1); | |
cf8f70bf | 4974 | /* do not return to emulator after return from userspace */ |
7972995b | 4975 | vcpu->arch.pio.count = 0; |
de7d789a CO |
4976 | return ret; |
4977 | } | |
cf8f70bf | 4978 | EXPORT_SYMBOL_GPL(kvm_fast_pio_out); |
de7d789a | 4979 | |
8cfdc000 ZA |
4980 | static void tsc_bad(void *info) |
4981 | { | |
0a3aee0d | 4982 | __this_cpu_write(cpu_tsc_khz, 0); |
8cfdc000 ZA |
4983 | } |
4984 | ||
4985 | static void tsc_khz_changed(void *data) | |
c8076604 | 4986 | { |
8cfdc000 ZA |
4987 | struct cpufreq_freqs *freq = data; |
4988 | unsigned long khz = 0; | |
4989 | ||
4990 | if (data) | |
4991 | khz = freq->new; | |
4992 | else if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) | |
4993 | khz = cpufreq_quick_get(raw_smp_processor_id()); | |
4994 | if (!khz) | |
4995 | khz = tsc_khz; | |
0a3aee0d | 4996 | __this_cpu_write(cpu_tsc_khz, khz); |
c8076604 GH |
4997 | } |
4998 | ||
c8076604 GH |
4999 | static int kvmclock_cpufreq_notifier(struct notifier_block *nb, unsigned long val, |
5000 | void *data) | |
5001 | { | |
5002 | struct cpufreq_freqs *freq = data; | |
5003 | struct kvm *kvm; | |
5004 | struct kvm_vcpu *vcpu; | |
5005 | int i, send_ipi = 0; | |
5006 | ||
8cfdc000 ZA |
5007 | /* |
5008 | * We allow guests to temporarily run on slowing clocks, | |
5009 | * provided we notify them after, or to run on accelerating | |
5010 | * clocks, provided we notify them before. Thus time never | |
5011 | * goes backwards. | |
5012 | * | |
5013 | * However, we have a problem. We can't atomically update | |
5014 | * the frequency of a given CPU from this function; it is | |
5015 | * merely a notifier, which can be called from any CPU. | |
5016 | * Changing the TSC frequency at arbitrary points in time | |
5017 | * requires a recomputation of local variables related to | |
5018 | * the TSC for each VCPU. We must flag these local variables | |
5019 | * to be updated and be sure the update takes place with the | |
5020 | * new frequency before any guests proceed. | |
5021 | * | |
5022 | * Unfortunately, the combination of hotplug CPU and frequency | |
5023 | * change creates an intractable locking scenario; the order | |
5024 | * of when these callouts happen is undefined with respect to | |
5025 | * CPU hotplug, and they can race with each other. As such, | |
5026 | * merely setting per_cpu(cpu_tsc_khz) = X during a hotadd is | |
5027 | * undefined; you can actually have a CPU frequency change take | |
5028 | * place in between the computation of X and the setting of the | |
5029 | * variable. To protect against this problem, all updates of | |
5030 | * the per_cpu tsc_khz variable are done in an interrupt | |
5031 | * protected IPI, and all callers wishing to update the value | |
5032 | * must wait for a synchronous IPI to complete (which is trivial | |
5033 | * if the caller is on the CPU already). This establishes the | |
5034 | * necessary total order on variable updates. | |
5035 | * | |
5036 | * Note that because a guest time update may take place | |
5037 | * anytime after the setting of the VCPU's request bit, the | |
5038 | * correct TSC value must be set before the request. However, | |
5039 | * to ensure the update actually makes it to any guest which | |
5040 | * starts running in hardware virtualization between the set | |
5041 | * and the acquisition of the spinlock, we must also ping the | |
5042 | * CPU after setting the request bit. | |
5043 | * | |
5044 | */ | |
5045 | ||
c8076604 GH |
5046 | if (val == CPUFREQ_PRECHANGE && freq->old > freq->new) |
5047 | return 0; | |
5048 | if (val == CPUFREQ_POSTCHANGE && freq->old < freq->new) | |
5049 | return 0; | |
8cfdc000 ZA |
5050 | |
5051 | smp_call_function_single(freq->cpu, tsc_khz_changed, freq, 1); | |
c8076604 | 5052 | |
e935b837 | 5053 | raw_spin_lock(&kvm_lock); |
c8076604 | 5054 | list_for_each_entry(kvm, &vm_list, vm_list) { |
988a2cae | 5055 | kvm_for_each_vcpu(i, vcpu, kvm) { |
c8076604 GH |
5056 | if (vcpu->cpu != freq->cpu) |
5057 | continue; | |
c285545f | 5058 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
c8076604 | 5059 | if (vcpu->cpu != smp_processor_id()) |
8cfdc000 | 5060 | send_ipi = 1; |
c8076604 GH |
5061 | } |
5062 | } | |
e935b837 | 5063 | raw_spin_unlock(&kvm_lock); |
c8076604 GH |
5064 | |
5065 | if (freq->old < freq->new && send_ipi) { | |
5066 | /* | |
5067 | * We upscale the frequency. Must make the guest | |
5068 | * doesn't see old kvmclock values while running with | |
5069 | * the new frequency, otherwise we risk the guest sees | |
5070 | * time go backwards. | |
5071 | * | |
5072 | * In case we update the frequency for another cpu | |
5073 | * (which might be in guest context) send an interrupt | |
5074 | * to kick the cpu out of guest context. Next time | |
5075 | * guest context is entered kvmclock will be updated, | |
5076 | * so the guest will not see stale values. | |
5077 | */ | |
8cfdc000 | 5078 | smp_call_function_single(freq->cpu, tsc_khz_changed, freq, 1); |
c8076604 GH |
5079 | } |
5080 | return 0; | |
5081 | } | |
5082 | ||
5083 | static struct notifier_block kvmclock_cpufreq_notifier_block = { | |
8cfdc000 ZA |
5084 | .notifier_call = kvmclock_cpufreq_notifier |
5085 | }; | |
5086 | ||
5087 | static int kvmclock_cpu_notifier(struct notifier_block *nfb, | |
5088 | unsigned long action, void *hcpu) | |
5089 | { | |
5090 | unsigned int cpu = (unsigned long)hcpu; | |
5091 | ||
5092 | switch (action) { | |
5093 | case CPU_ONLINE: | |
5094 | case CPU_DOWN_FAILED: | |
5095 | smp_call_function_single(cpu, tsc_khz_changed, NULL, 1); | |
5096 | break; | |
5097 | case CPU_DOWN_PREPARE: | |
5098 | smp_call_function_single(cpu, tsc_bad, NULL, 1); | |
5099 | break; | |
5100 | } | |
5101 | return NOTIFY_OK; | |
5102 | } | |
5103 | ||
5104 | static struct notifier_block kvmclock_cpu_notifier_block = { | |
5105 | .notifier_call = kvmclock_cpu_notifier, | |
5106 | .priority = -INT_MAX | |
c8076604 GH |
5107 | }; |
5108 | ||
b820cc0c ZA |
5109 | static void kvm_timer_init(void) |
5110 | { | |
5111 | int cpu; | |
5112 | ||
c285545f | 5113 | max_tsc_khz = tsc_khz; |
8cfdc000 | 5114 | register_hotcpu_notifier(&kvmclock_cpu_notifier_block); |
b820cc0c | 5115 | if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) { |
c285545f ZA |
5116 | #ifdef CONFIG_CPU_FREQ |
5117 | struct cpufreq_policy policy; | |
5118 | memset(&policy, 0, sizeof(policy)); | |
3e26f230 AK |
5119 | cpu = get_cpu(); |
5120 | cpufreq_get_policy(&policy, cpu); | |
c285545f ZA |
5121 | if (policy.cpuinfo.max_freq) |
5122 | max_tsc_khz = policy.cpuinfo.max_freq; | |
3e26f230 | 5123 | put_cpu(); |
c285545f | 5124 | #endif |
b820cc0c ZA |
5125 | cpufreq_register_notifier(&kvmclock_cpufreq_notifier_block, |
5126 | CPUFREQ_TRANSITION_NOTIFIER); | |
5127 | } | |
c285545f | 5128 | pr_debug("kvm: max_tsc_khz = %ld\n", max_tsc_khz); |
8cfdc000 ZA |
5129 | for_each_online_cpu(cpu) |
5130 | smp_call_function_single(cpu, tsc_khz_changed, NULL, 1); | |
b820cc0c ZA |
5131 | } |
5132 | ||
ff9d07a0 ZY |
5133 | static DEFINE_PER_CPU(struct kvm_vcpu *, current_vcpu); |
5134 | ||
5135 | static int kvm_is_in_guest(void) | |
5136 | { | |
5137 | return percpu_read(current_vcpu) != NULL; | |
5138 | } | |
5139 | ||
5140 | static int kvm_is_user_mode(void) | |
5141 | { | |
5142 | int user_mode = 3; | |
dcf46b94 | 5143 | |
ff9d07a0 ZY |
5144 | if (percpu_read(current_vcpu)) |
5145 | user_mode = kvm_x86_ops->get_cpl(percpu_read(current_vcpu)); | |
dcf46b94 | 5146 | |
ff9d07a0 ZY |
5147 | return user_mode != 0; |
5148 | } | |
5149 | ||
5150 | static unsigned long kvm_get_guest_ip(void) | |
5151 | { | |
5152 | unsigned long ip = 0; | |
dcf46b94 | 5153 | |
ff9d07a0 ZY |
5154 | if (percpu_read(current_vcpu)) |
5155 | ip = kvm_rip_read(percpu_read(current_vcpu)); | |
dcf46b94 | 5156 | |
ff9d07a0 ZY |
5157 | return ip; |
5158 | } | |
5159 | ||
5160 | static struct perf_guest_info_callbacks kvm_guest_cbs = { | |
5161 | .is_in_guest = kvm_is_in_guest, | |
5162 | .is_user_mode = kvm_is_user_mode, | |
5163 | .get_guest_ip = kvm_get_guest_ip, | |
5164 | }; | |
5165 | ||
5166 | void kvm_before_handle_nmi(struct kvm_vcpu *vcpu) | |
5167 | { | |
5168 | percpu_write(current_vcpu, vcpu); | |
5169 | } | |
5170 | EXPORT_SYMBOL_GPL(kvm_before_handle_nmi); | |
5171 | ||
5172 | void kvm_after_handle_nmi(struct kvm_vcpu *vcpu) | |
5173 | { | |
5174 | percpu_write(current_vcpu, NULL); | |
5175 | } | |
5176 | EXPORT_SYMBOL_GPL(kvm_after_handle_nmi); | |
5177 | ||
ce88decf XG |
5178 | static void kvm_set_mmio_spte_mask(void) |
5179 | { | |
5180 | u64 mask; | |
5181 | int maxphyaddr = boot_cpu_data.x86_phys_bits; | |
5182 | ||
5183 | /* | |
5184 | * Set the reserved bits and the present bit of an paging-structure | |
5185 | * entry to generate page fault with PFER.RSV = 1. | |
5186 | */ | |
5187 | mask = ((1ull << (62 - maxphyaddr + 1)) - 1) << maxphyaddr; | |
5188 | mask |= 1ull; | |
5189 | ||
5190 | #ifdef CONFIG_X86_64 | |
5191 | /* | |
5192 | * If reserved bit is not supported, clear the present bit to disable | |
5193 | * mmio page fault. | |
5194 | */ | |
5195 | if (maxphyaddr == 52) | |
5196 | mask &= ~1ull; | |
5197 | #endif | |
5198 | ||
5199 | kvm_mmu_set_mmio_spte_mask(mask); | |
5200 | } | |
5201 | ||
f8c16bba | 5202 | int kvm_arch_init(void *opaque) |
043405e1 | 5203 | { |
b820cc0c | 5204 | int r; |
f8c16bba ZX |
5205 | struct kvm_x86_ops *ops = (struct kvm_x86_ops *)opaque; |
5206 | ||
f8c16bba ZX |
5207 | if (kvm_x86_ops) { |
5208 | printk(KERN_ERR "kvm: already loaded the other module\n"); | |
56c6d28a ZX |
5209 | r = -EEXIST; |
5210 | goto out; | |
f8c16bba ZX |
5211 | } |
5212 | ||
5213 | if (!ops->cpu_has_kvm_support()) { | |
5214 | printk(KERN_ERR "kvm: no hardware support\n"); | |
56c6d28a ZX |
5215 | r = -EOPNOTSUPP; |
5216 | goto out; | |
f8c16bba ZX |
5217 | } |
5218 | if (ops->disabled_by_bios()) { | |
5219 | printk(KERN_ERR "kvm: disabled by bios\n"); | |
56c6d28a ZX |
5220 | r = -EOPNOTSUPP; |
5221 | goto out; | |
f8c16bba ZX |
5222 | } |
5223 | ||
97db56ce AK |
5224 | r = kvm_mmu_module_init(); |
5225 | if (r) | |
5226 | goto out; | |
5227 | ||
ce88decf | 5228 | kvm_set_mmio_spte_mask(); |
97db56ce AK |
5229 | kvm_init_msr_list(); |
5230 | ||
f8c16bba | 5231 | kvm_x86_ops = ops; |
7b52345e | 5232 | kvm_mmu_set_mask_ptes(PT_USER_MASK, PT_ACCESSED_MASK, |
4b12f0de | 5233 | PT_DIRTY_MASK, PT64_NX_MASK, 0); |
c8076604 | 5234 | |
b820cc0c | 5235 | kvm_timer_init(); |
c8076604 | 5236 | |
ff9d07a0 ZY |
5237 | perf_register_guest_info_callbacks(&kvm_guest_cbs); |
5238 | ||
2acf923e DC |
5239 | if (cpu_has_xsave) |
5240 | host_xcr0 = xgetbv(XCR_XFEATURE_ENABLED_MASK); | |
5241 | ||
f8c16bba | 5242 | return 0; |
56c6d28a ZX |
5243 | |
5244 | out: | |
56c6d28a | 5245 | return r; |
043405e1 | 5246 | } |
8776e519 | 5247 | |
f8c16bba ZX |
5248 | void kvm_arch_exit(void) |
5249 | { | |
ff9d07a0 ZY |
5250 | perf_unregister_guest_info_callbacks(&kvm_guest_cbs); |
5251 | ||
888d256e JK |
5252 | if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) |
5253 | cpufreq_unregister_notifier(&kvmclock_cpufreq_notifier_block, | |
5254 | CPUFREQ_TRANSITION_NOTIFIER); | |
8cfdc000 | 5255 | unregister_hotcpu_notifier(&kvmclock_cpu_notifier_block); |
f8c16bba | 5256 | kvm_x86_ops = NULL; |
56c6d28a ZX |
5257 | kvm_mmu_module_exit(); |
5258 | } | |
f8c16bba | 5259 | |
8776e519 HB |
5260 | int kvm_emulate_halt(struct kvm_vcpu *vcpu) |
5261 | { | |
5262 | ++vcpu->stat.halt_exits; | |
5263 | if (irqchip_in_kernel(vcpu->kvm)) { | |
a4535290 | 5264 | vcpu->arch.mp_state = KVM_MP_STATE_HALTED; |
8776e519 HB |
5265 | return 1; |
5266 | } else { | |
5267 | vcpu->run->exit_reason = KVM_EXIT_HLT; | |
5268 | return 0; | |
5269 | } | |
5270 | } | |
5271 | EXPORT_SYMBOL_GPL(kvm_emulate_halt); | |
5272 | ||
55cd8e5a GN |
5273 | int kvm_hv_hypercall(struct kvm_vcpu *vcpu) |
5274 | { | |
5275 | u64 param, ingpa, outgpa, ret; | |
5276 | uint16_t code, rep_idx, rep_cnt, res = HV_STATUS_SUCCESS, rep_done = 0; | |
5277 | bool fast, longmode; | |
5278 | int cs_db, cs_l; | |
5279 | ||
5280 | /* | |
5281 | * hypercall generates UD from non zero cpl and real mode | |
5282 | * per HYPER-V spec | |
5283 | */ | |
3eeb3288 | 5284 | if (kvm_x86_ops->get_cpl(vcpu) != 0 || !is_protmode(vcpu)) { |
55cd8e5a GN |
5285 | kvm_queue_exception(vcpu, UD_VECTOR); |
5286 | return 0; | |
5287 | } | |
5288 | ||
5289 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); | |
5290 | longmode = is_long_mode(vcpu) && cs_l == 1; | |
5291 | ||
5292 | if (!longmode) { | |
ccd46936 GN |
5293 | param = ((u64)kvm_register_read(vcpu, VCPU_REGS_RDX) << 32) | |
5294 | (kvm_register_read(vcpu, VCPU_REGS_RAX) & 0xffffffff); | |
5295 | ingpa = ((u64)kvm_register_read(vcpu, VCPU_REGS_RBX) << 32) | | |
5296 | (kvm_register_read(vcpu, VCPU_REGS_RCX) & 0xffffffff); | |
5297 | outgpa = ((u64)kvm_register_read(vcpu, VCPU_REGS_RDI) << 32) | | |
5298 | (kvm_register_read(vcpu, VCPU_REGS_RSI) & 0xffffffff); | |
55cd8e5a GN |
5299 | } |
5300 | #ifdef CONFIG_X86_64 | |
5301 | else { | |
5302 | param = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
5303 | ingpa = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
5304 | outgpa = kvm_register_read(vcpu, VCPU_REGS_R8); | |
5305 | } | |
5306 | #endif | |
5307 | ||
5308 | code = param & 0xffff; | |
5309 | fast = (param >> 16) & 0x1; | |
5310 | rep_cnt = (param >> 32) & 0xfff; | |
5311 | rep_idx = (param >> 48) & 0xfff; | |
5312 | ||
5313 | trace_kvm_hv_hypercall(code, fast, rep_cnt, rep_idx, ingpa, outgpa); | |
5314 | ||
c25bc163 GN |
5315 | switch (code) { |
5316 | case HV_X64_HV_NOTIFY_LONG_SPIN_WAIT: | |
5317 | kvm_vcpu_on_spin(vcpu); | |
5318 | break; | |
5319 | default: | |
5320 | res = HV_STATUS_INVALID_HYPERCALL_CODE; | |
5321 | break; | |
5322 | } | |
55cd8e5a GN |
5323 | |
5324 | ret = res | (((u64)rep_done & 0xfff) << 32); | |
5325 | if (longmode) { | |
5326 | kvm_register_write(vcpu, VCPU_REGS_RAX, ret); | |
5327 | } else { | |
5328 | kvm_register_write(vcpu, VCPU_REGS_RDX, ret >> 32); | |
5329 | kvm_register_write(vcpu, VCPU_REGS_RAX, ret & 0xffffffff); | |
5330 | } | |
5331 | ||
5332 | return 1; | |
5333 | } | |
5334 | ||
8776e519 HB |
5335 | int kvm_emulate_hypercall(struct kvm_vcpu *vcpu) |
5336 | { | |
5337 | unsigned long nr, a0, a1, a2, a3, ret; | |
2f333bcb | 5338 | int r = 1; |
8776e519 | 5339 | |
55cd8e5a GN |
5340 | if (kvm_hv_hypercall_enabled(vcpu->kvm)) |
5341 | return kvm_hv_hypercall(vcpu); | |
5342 | ||
5fdbf976 MT |
5343 | nr = kvm_register_read(vcpu, VCPU_REGS_RAX); |
5344 | a0 = kvm_register_read(vcpu, VCPU_REGS_RBX); | |
5345 | a1 = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
5346 | a2 = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
5347 | a3 = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
8776e519 | 5348 | |
229456fc | 5349 | trace_kvm_hypercall(nr, a0, a1, a2, a3); |
2714d1d3 | 5350 | |
8776e519 HB |
5351 | if (!is_long_mode(vcpu)) { |
5352 | nr &= 0xFFFFFFFF; | |
5353 | a0 &= 0xFFFFFFFF; | |
5354 | a1 &= 0xFFFFFFFF; | |
5355 | a2 &= 0xFFFFFFFF; | |
5356 | a3 &= 0xFFFFFFFF; | |
5357 | } | |
5358 | ||
07708c4a JK |
5359 | if (kvm_x86_ops->get_cpl(vcpu) != 0) { |
5360 | ret = -KVM_EPERM; | |
5361 | goto out; | |
5362 | } | |
5363 | ||
8776e519 | 5364 | switch (nr) { |
b93463aa AK |
5365 | case KVM_HC_VAPIC_POLL_IRQ: |
5366 | ret = 0; | |
5367 | break; | |
8776e519 HB |
5368 | default: |
5369 | ret = -KVM_ENOSYS; | |
5370 | break; | |
5371 | } | |
07708c4a | 5372 | out: |
5fdbf976 | 5373 | kvm_register_write(vcpu, VCPU_REGS_RAX, ret); |
f11c3a8d | 5374 | ++vcpu->stat.hypercalls; |
2f333bcb | 5375 | return r; |
8776e519 HB |
5376 | } |
5377 | EXPORT_SYMBOL_GPL(kvm_emulate_hypercall); | |
5378 | ||
d6aa1000 | 5379 | int emulator_fix_hypercall(struct x86_emulate_ctxt *ctxt) |
8776e519 | 5380 | { |
d6aa1000 | 5381 | struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); |
8776e519 | 5382 | char instruction[3]; |
5fdbf976 | 5383 | unsigned long rip = kvm_rip_read(vcpu); |
8776e519 | 5384 | |
8776e519 HB |
5385 | /* |
5386 | * Blow out the MMU to ensure that no other VCPU has an active mapping | |
5387 | * to ensure that the updated hypercall appears atomically across all | |
5388 | * VCPUs. | |
5389 | */ | |
5390 | kvm_mmu_zap_all(vcpu->kvm); | |
5391 | ||
8776e519 | 5392 | kvm_x86_ops->patch_hypercall(vcpu, instruction); |
8776e519 | 5393 | |
9d74191a | 5394 | return emulator_write_emulated(ctxt, rip, instruction, 3, NULL); |
8776e519 HB |
5395 | } |
5396 | ||
07716717 DK |
5397 | static int move_to_next_stateful_cpuid_entry(struct kvm_vcpu *vcpu, int i) |
5398 | { | |
ad312c7c ZX |
5399 | struct kvm_cpuid_entry2 *e = &vcpu->arch.cpuid_entries[i]; |
5400 | int j, nent = vcpu->arch.cpuid_nent; | |
07716717 DK |
5401 | |
5402 | e->flags &= ~KVM_CPUID_FLAG_STATE_READ_NEXT; | |
5403 | /* when no next entry is found, the current entry[i] is reselected */ | |
0fdf8e59 | 5404 | for (j = i + 1; ; j = (j + 1) % nent) { |
ad312c7c | 5405 | struct kvm_cpuid_entry2 *ej = &vcpu->arch.cpuid_entries[j]; |
07716717 DK |
5406 | if (ej->function == e->function) { |
5407 | ej->flags |= KVM_CPUID_FLAG_STATE_READ_NEXT; | |
5408 | return j; | |
5409 | } | |
5410 | } | |
5411 | return 0; /* silence gcc, even though control never reaches here */ | |
5412 | } | |
5413 | ||
5414 | /* find an entry with matching function, matching index (if needed), and that | |
5415 | * should be read next (if it's stateful) */ | |
5416 | static int is_matching_cpuid_entry(struct kvm_cpuid_entry2 *e, | |
5417 | u32 function, u32 index) | |
5418 | { | |
5419 | if (e->function != function) | |
5420 | return 0; | |
5421 | if ((e->flags & KVM_CPUID_FLAG_SIGNIFCANT_INDEX) && e->index != index) | |
5422 | return 0; | |
5423 | if ((e->flags & KVM_CPUID_FLAG_STATEFUL_FUNC) && | |
19355475 | 5424 | !(e->flags & KVM_CPUID_FLAG_STATE_READ_NEXT)) |
07716717 DK |
5425 | return 0; |
5426 | return 1; | |
5427 | } | |
5428 | ||
d8017474 AG |
5429 | struct kvm_cpuid_entry2 *kvm_find_cpuid_entry(struct kvm_vcpu *vcpu, |
5430 | u32 function, u32 index) | |
8776e519 HB |
5431 | { |
5432 | int i; | |
d8017474 | 5433 | struct kvm_cpuid_entry2 *best = NULL; |
8776e519 | 5434 | |
ad312c7c | 5435 | for (i = 0; i < vcpu->arch.cpuid_nent; ++i) { |
d8017474 AG |
5436 | struct kvm_cpuid_entry2 *e; |
5437 | ||
ad312c7c | 5438 | e = &vcpu->arch.cpuid_entries[i]; |
07716717 DK |
5439 | if (is_matching_cpuid_entry(e, function, index)) { |
5440 | if (e->flags & KVM_CPUID_FLAG_STATEFUL_FUNC) | |
5441 | move_to_next_stateful_cpuid_entry(vcpu, i); | |
8776e519 HB |
5442 | best = e; |
5443 | break; | |
5444 | } | |
8776e519 | 5445 | } |
d8017474 AG |
5446 | return best; |
5447 | } | |
0e851880 | 5448 | EXPORT_SYMBOL_GPL(kvm_find_cpuid_entry); |
d8017474 | 5449 | |
82725b20 DE |
5450 | int cpuid_maxphyaddr(struct kvm_vcpu *vcpu) |
5451 | { | |
5452 | struct kvm_cpuid_entry2 *best; | |
5453 | ||
f7a71197 AK |
5454 | best = kvm_find_cpuid_entry(vcpu, 0x80000000, 0); |
5455 | if (!best || best->eax < 0x80000008) | |
5456 | goto not_found; | |
82725b20 DE |
5457 | best = kvm_find_cpuid_entry(vcpu, 0x80000008, 0); |
5458 | if (best) | |
5459 | return best->eax & 0xff; | |
f7a71197 | 5460 | not_found: |
82725b20 DE |
5461 | return 36; |
5462 | } | |
5463 | ||
bd22f5cf AP |
5464 | /* |
5465 | * If no match is found, check whether we exceed the vCPU's limit | |
5466 | * and return the content of the highest valid _standard_ leaf instead. | |
5467 | * This is to satisfy the CPUID specification. | |
5468 | */ | |
5469 | static struct kvm_cpuid_entry2* check_cpuid_limit(struct kvm_vcpu *vcpu, | |
5470 | u32 function, u32 index) | |
5471 | { | |
5472 | struct kvm_cpuid_entry2 *maxlevel; | |
5473 | ||
5474 | maxlevel = kvm_find_cpuid_entry(vcpu, function & 0x80000000, 0); | |
5475 | if (!maxlevel || maxlevel->eax >= function) | |
5476 | return NULL; | |
5477 | if (function & 0x80000000) { | |
5478 | maxlevel = kvm_find_cpuid_entry(vcpu, 0, 0); | |
5479 | if (!maxlevel) | |
5480 | return NULL; | |
5481 | } | |
5482 | return kvm_find_cpuid_entry(vcpu, maxlevel->eax, index); | |
5483 | } | |
5484 | ||
d8017474 AG |
5485 | void kvm_emulate_cpuid(struct kvm_vcpu *vcpu) |
5486 | { | |
5487 | u32 function, index; | |
5488 | struct kvm_cpuid_entry2 *best; | |
5489 | ||
5490 | function = kvm_register_read(vcpu, VCPU_REGS_RAX); | |
5491 | index = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
5492 | kvm_register_write(vcpu, VCPU_REGS_RAX, 0); | |
5493 | kvm_register_write(vcpu, VCPU_REGS_RBX, 0); | |
5494 | kvm_register_write(vcpu, VCPU_REGS_RCX, 0); | |
5495 | kvm_register_write(vcpu, VCPU_REGS_RDX, 0); | |
5496 | best = kvm_find_cpuid_entry(vcpu, function, index); | |
bd22f5cf AP |
5497 | |
5498 | if (!best) | |
5499 | best = check_cpuid_limit(vcpu, function, index); | |
5500 | ||
8776e519 | 5501 | if (best) { |
5fdbf976 MT |
5502 | kvm_register_write(vcpu, VCPU_REGS_RAX, best->eax); |
5503 | kvm_register_write(vcpu, VCPU_REGS_RBX, best->ebx); | |
5504 | kvm_register_write(vcpu, VCPU_REGS_RCX, best->ecx); | |
5505 | kvm_register_write(vcpu, VCPU_REGS_RDX, best->edx); | |
8776e519 | 5506 | } |
8776e519 | 5507 | kvm_x86_ops->skip_emulated_instruction(vcpu); |
229456fc MT |
5508 | trace_kvm_cpuid(function, |
5509 | kvm_register_read(vcpu, VCPU_REGS_RAX), | |
5510 | kvm_register_read(vcpu, VCPU_REGS_RBX), | |
5511 | kvm_register_read(vcpu, VCPU_REGS_RCX), | |
5512 | kvm_register_read(vcpu, VCPU_REGS_RDX)); | |
8776e519 HB |
5513 | } |
5514 | EXPORT_SYMBOL_GPL(kvm_emulate_cpuid); | |
d0752060 | 5515 | |
b6c7a5dc HB |
5516 | /* |
5517 | * Check if userspace requested an interrupt window, and that the | |
5518 | * interrupt window is open. | |
5519 | * | |
5520 | * No need to exit to userspace if we already have an interrupt queued. | |
5521 | */ | |
851ba692 | 5522 | static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu) |
b6c7a5dc | 5523 | { |
8061823a | 5524 | return (!irqchip_in_kernel(vcpu->kvm) && !kvm_cpu_has_interrupt(vcpu) && |
851ba692 | 5525 | vcpu->run->request_interrupt_window && |
5df56646 | 5526 | kvm_arch_interrupt_allowed(vcpu)); |
b6c7a5dc HB |
5527 | } |
5528 | ||
851ba692 | 5529 | static void post_kvm_run_save(struct kvm_vcpu *vcpu) |
b6c7a5dc | 5530 | { |
851ba692 AK |
5531 | struct kvm_run *kvm_run = vcpu->run; |
5532 | ||
91586a3b | 5533 | kvm_run->if_flag = (kvm_get_rflags(vcpu) & X86_EFLAGS_IF) != 0; |
2d3ad1f4 | 5534 | kvm_run->cr8 = kvm_get_cr8(vcpu); |
b6c7a5dc | 5535 | kvm_run->apic_base = kvm_get_apic_base(vcpu); |
4531220b | 5536 | if (irqchip_in_kernel(vcpu->kvm)) |
b6c7a5dc | 5537 | kvm_run->ready_for_interrupt_injection = 1; |
4531220b | 5538 | else |
b6c7a5dc | 5539 | kvm_run->ready_for_interrupt_injection = |
fa9726b0 GN |
5540 | kvm_arch_interrupt_allowed(vcpu) && |
5541 | !kvm_cpu_has_interrupt(vcpu) && | |
5542 | !kvm_event_needs_reinjection(vcpu); | |
b6c7a5dc HB |
5543 | } |
5544 | ||
b93463aa AK |
5545 | static void vapic_enter(struct kvm_vcpu *vcpu) |
5546 | { | |
5547 | struct kvm_lapic *apic = vcpu->arch.apic; | |
5548 | struct page *page; | |
5549 | ||
5550 | if (!apic || !apic->vapic_addr) | |
5551 | return; | |
5552 | ||
5553 | page = gfn_to_page(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT); | |
72dc67a6 IE |
5554 | |
5555 | vcpu->arch.apic->vapic_page = page; | |
b93463aa AK |
5556 | } |
5557 | ||
5558 | static void vapic_exit(struct kvm_vcpu *vcpu) | |
5559 | { | |
5560 | struct kvm_lapic *apic = vcpu->arch.apic; | |
f656ce01 | 5561 | int idx; |
b93463aa AK |
5562 | |
5563 | if (!apic || !apic->vapic_addr) | |
5564 | return; | |
5565 | ||
f656ce01 | 5566 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
b93463aa AK |
5567 | kvm_release_page_dirty(apic->vapic_page); |
5568 | mark_page_dirty(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT); | |
f656ce01 | 5569 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
b93463aa AK |
5570 | } |
5571 | ||
95ba8273 GN |
5572 | static void update_cr8_intercept(struct kvm_vcpu *vcpu) |
5573 | { | |
5574 | int max_irr, tpr; | |
5575 | ||
5576 | if (!kvm_x86_ops->update_cr8_intercept) | |
5577 | return; | |
5578 | ||
88c808fd AK |
5579 | if (!vcpu->arch.apic) |
5580 | return; | |
5581 | ||
8db3baa2 GN |
5582 | if (!vcpu->arch.apic->vapic_addr) |
5583 | max_irr = kvm_lapic_find_highest_irr(vcpu); | |
5584 | else | |
5585 | max_irr = -1; | |
95ba8273 GN |
5586 | |
5587 | if (max_irr != -1) | |
5588 | max_irr >>= 4; | |
5589 | ||
5590 | tpr = kvm_lapic_get_cr8(vcpu); | |
5591 | ||
5592 | kvm_x86_ops->update_cr8_intercept(vcpu, tpr, max_irr); | |
5593 | } | |
5594 | ||
851ba692 | 5595 | static void inject_pending_event(struct kvm_vcpu *vcpu) |
95ba8273 GN |
5596 | { |
5597 | /* try to reinject previous events if any */ | |
b59bb7bd | 5598 | if (vcpu->arch.exception.pending) { |
5c1c85d0 AK |
5599 | trace_kvm_inj_exception(vcpu->arch.exception.nr, |
5600 | vcpu->arch.exception.has_error_code, | |
5601 | vcpu->arch.exception.error_code); | |
b59bb7bd GN |
5602 | kvm_x86_ops->queue_exception(vcpu, vcpu->arch.exception.nr, |
5603 | vcpu->arch.exception.has_error_code, | |
ce7ddec4 JR |
5604 | vcpu->arch.exception.error_code, |
5605 | vcpu->arch.exception.reinject); | |
b59bb7bd GN |
5606 | return; |
5607 | } | |
5608 | ||
95ba8273 GN |
5609 | if (vcpu->arch.nmi_injected) { |
5610 | kvm_x86_ops->set_nmi(vcpu); | |
5611 | return; | |
5612 | } | |
5613 | ||
5614 | if (vcpu->arch.interrupt.pending) { | |
66fd3f7f | 5615 | kvm_x86_ops->set_irq(vcpu); |
95ba8273 GN |
5616 | return; |
5617 | } | |
5618 | ||
5619 | /* try to inject new event if pending */ | |
5620 | if (vcpu->arch.nmi_pending) { | |
5621 | if (kvm_x86_ops->nmi_allowed(vcpu)) { | |
7460fb4a | 5622 | --vcpu->arch.nmi_pending; |
95ba8273 GN |
5623 | vcpu->arch.nmi_injected = true; |
5624 | kvm_x86_ops->set_nmi(vcpu); | |
5625 | } | |
5626 | } else if (kvm_cpu_has_interrupt(vcpu)) { | |
5627 | if (kvm_x86_ops->interrupt_allowed(vcpu)) { | |
66fd3f7f GN |
5628 | kvm_queue_interrupt(vcpu, kvm_cpu_get_interrupt(vcpu), |
5629 | false); | |
5630 | kvm_x86_ops->set_irq(vcpu); | |
95ba8273 GN |
5631 | } |
5632 | } | |
5633 | } | |
5634 | ||
2acf923e DC |
5635 | static void kvm_load_guest_xcr0(struct kvm_vcpu *vcpu) |
5636 | { | |
5637 | if (kvm_read_cr4_bits(vcpu, X86_CR4_OSXSAVE) && | |
5638 | !vcpu->guest_xcr0_loaded) { | |
5639 | /* kvm_set_xcr() also depends on this */ | |
5640 | xsetbv(XCR_XFEATURE_ENABLED_MASK, vcpu->arch.xcr0); | |
5641 | vcpu->guest_xcr0_loaded = 1; | |
5642 | } | |
5643 | } | |
5644 | ||
5645 | static void kvm_put_guest_xcr0(struct kvm_vcpu *vcpu) | |
5646 | { | |
5647 | if (vcpu->guest_xcr0_loaded) { | |
5648 | if (vcpu->arch.xcr0 != host_xcr0) | |
5649 | xsetbv(XCR_XFEATURE_ENABLED_MASK, host_xcr0); | |
5650 | vcpu->guest_xcr0_loaded = 0; | |
5651 | } | |
5652 | } | |
5653 | ||
7460fb4a AK |
5654 | static void process_nmi(struct kvm_vcpu *vcpu) |
5655 | { | |
5656 | unsigned limit = 2; | |
5657 | ||
5658 | /* | |
5659 | * x86 is limited to one NMI running, and one NMI pending after it. | |
5660 | * If an NMI is already in progress, limit further NMIs to just one. | |
5661 | * Otherwise, allow two (and we'll inject the first one immediately). | |
5662 | */ | |
5663 | if (kvm_x86_ops->get_nmi_mask(vcpu) || vcpu->arch.nmi_injected) | |
5664 | limit = 1; | |
5665 | ||
5666 | vcpu->arch.nmi_pending += atomic_xchg(&vcpu->arch.nmi_queued, 0); | |
5667 | vcpu->arch.nmi_pending = min(vcpu->arch.nmi_pending, limit); | |
5668 | kvm_make_request(KVM_REQ_EVENT, vcpu); | |
5669 | } | |
5670 | ||
851ba692 | 5671 | static int vcpu_enter_guest(struct kvm_vcpu *vcpu) |
b6c7a5dc HB |
5672 | { |
5673 | int r; | |
6a8b1d13 | 5674 | bool req_int_win = !irqchip_in_kernel(vcpu->kvm) && |
851ba692 | 5675 | vcpu->run->request_interrupt_window; |
d6185f20 | 5676 | bool req_immediate_exit = 0; |
b6c7a5dc | 5677 | |
3e007509 | 5678 | if (vcpu->requests) { |
a8eeb04a | 5679 | if (kvm_check_request(KVM_REQ_MMU_RELOAD, vcpu)) |
2e53d63a | 5680 | kvm_mmu_unload(vcpu); |
a8eeb04a | 5681 | if (kvm_check_request(KVM_REQ_MIGRATE_TIMER, vcpu)) |
2f599714 | 5682 | __kvm_migrate_timers(vcpu); |
34c238a1 ZA |
5683 | if (kvm_check_request(KVM_REQ_CLOCK_UPDATE, vcpu)) { |
5684 | r = kvm_guest_time_update(vcpu); | |
8cfdc000 ZA |
5685 | if (unlikely(r)) |
5686 | goto out; | |
5687 | } | |
a8eeb04a | 5688 | if (kvm_check_request(KVM_REQ_MMU_SYNC, vcpu)) |
4731d4c7 | 5689 | kvm_mmu_sync_roots(vcpu); |
a8eeb04a | 5690 | if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu)) |
d4acf7e7 | 5691 | kvm_x86_ops->tlb_flush(vcpu); |
a8eeb04a | 5692 | if (kvm_check_request(KVM_REQ_REPORT_TPR_ACCESS, vcpu)) { |
851ba692 | 5693 | vcpu->run->exit_reason = KVM_EXIT_TPR_ACCESS; |
b93463aa AK |
5694 | r = 0; |
5695 | goto out; | |
5696 | } | |
a8eeb04a | 5697 | if (kvm_check_request(KVM_REQ_TRIPLE_FAULT, vcpu)) { |
851ba692 | 5698 | vcpu->run->exit_reason = KVM_EXIT_SHUTDOWN; |
71c4dfaf JR |
5699 | r = 0; |
5700 | goto out; | |
5701 | } | |
a8eeb04a | 5702 | if (kvm_check_request(KVM_REQ_DEACTIVATE_FPU, vcpu)) { |
02daab21 AK |
5703 | vcpu->fpu_active = 0; |
5704 | kvm_x86_ops->fpu_deactivate(vcpu); | |
5705 | } | |
af585b92 GN |
5706 | if (kvm_check_request(KVM_REQ_APF_HALT, vcpu)) { |
5707 | /* Page is swapped out. Do synthetic halt */ | |
5708 | vcpu->arch.apf.halted = true; | |
5709 | r = 1; | |
5710 | goto out; | |
5711 | } | |
c9aaa895 GC |
5712 | if (kvm_check_request(KVM_REQ_STEAL_UPDATE, vcpu)) |
5713 | record_steal_time(vcpu); | |
7460fb4a AK |
5714 | if (kvm_check_request(KVM_REQ_NMI, vcpu)) |
5715 | process_nmi(vcpu); | |
d6185f20 NHE |
5716 | req_immediate_exit = |
5717 | kvm_check_request(KVM_REQ_IMMEDIATE_EXIT, vcpu); | |
2f52d58c | 5718 | } |
b93463aa | 5719 | |
3e007509 AK |
5720 | r = kvm_mmu_reload(vcpu); |
5721 | if (unlikely(r)) | |
5722 | goto out; | |
5723 | ||
b463a6f7 AK |
5724 | if (kvm_check_request(KVM_REQ_EVENT, vcpu) || req_int_win) { |
5725 | inject_pending_event(vcpu); | |
5726 | ||
5727 | /* enable NMI/IRQ window open exits if needed */ | |
7460fb4a | 5728 | if (vcpu->arch.nmi_pending) |
b463a6f7 AK |
5729 | kvm_x86_ops->enable_nmi_window(vcpu); |
5730 | else if (kvm_cpu_has_interrupt(vcpu) || req_int_win) | |
5731 | kvm_x86_ops->enable_irq_window(vcpu); | |
5732 | ||
5733 | if (kvm_lapic_enabled(vcpu)) { | |
5734 | update_cr8_intercept(vcpu); | |
5735 | kvm_lapic_sync_to_vapic(vcpu); | |
5736 | } | |
5737 | } | |
5738 | ||
b6c7a5dc HB |
5739 | preempt_disable(); |
5740 | ||
5741 | kvm_x86_ops->prepare_guest_switch(vcpu); | |
2608d7a1 AK |
5742 | if (vcpu->fpu_active) |
5743 | kvm_load_guest_fpu(vcpu); | |
2acf923e | 5744 | kvm_load_guest_xcr0(vcpu); |
b6c7a5dc | 5745 | |
6b7e2d09 XG |
5746 | vcpu->mode = IN_GUEST_MODE; |
5747 | ||
5748 | /* We should set ->mode before check ->requests, | |
5749 | * see the comment in make_all_cpus_request. | |
5750 | */ | |
5751 | smp_mb(); | |
b6c7a5dc | 5752 | |
d94e1dc9 | 5753 | local_irq_disable(); |
32f88400 | 5754 | |
6b7e2d09 | 5755 | if (vcpu->mode == EXITING_GUEST_MODE || vcpu->requests |
d94e1dc9 | 5756 | || need_resched() || signal_pending(current)) { |
6b7e2d09 | 5757 | vcpu->mode = OUTSIDE_GUEST_MODE; |
d94e1dc9 | 5758 | smp_wmb(); |
6c142801 AK |
5759 | local_irq_enable(); |
5760 | preempt_enable(); | |
b463a6f7 | 5761 | kvm_x86_ops->cancel_injection(vcpu); |
6c142801 AK |
5762 | r = 1; |
5763 | goto out; | |
5764 | } | |
5765 | ||
f656ce01 | 5766 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
3200f405 | 5767 | |
d6185f20 NHE |
5768 | if (req_immediate_exit) |
5769 | smp_send_reschedule(vcpu->cpu); | |
5770 | ||
b6c7a5dc HB |
5771 | kvm_guest_enter(); |
5772 | ||
42dbaa5a | 5773 | if (unlikely(vcpu->arch.switch_db_regs)) { |
42dbaa5a JK |
5774 | set_debugreg(0, 7); |
5775 | set_debugreg(vcpu->arch.eff_db[0], 0); | |
5776 | set_debugreg(vcpu->arch.eff_db[1], 1); | |
5777 | set_debugreg(vcpu->arch.eff_db[2], 2); | |
5778 | set_debugreg(vcpu->arch.eff_db[3], 3); | |
5779 | } | |
b6c7a5dc | 5780 | |
229456fc | 5781 | trace_kvm_entry(vcpu->vcpu_id); |
851ba692 | 5782 | kvm_x86_ops->run(vcpu); |
b6c7a5dc | 5783 | |
24f1e32c FW |
5784 | /* |
5785 | * If the guest has used debug registers, at least dr7 | |
5786 | * will be disabled while returning to the host. | |
5787 | * If we don't have active breakpoints in the host, we don't | |
5788 | * care about the messed up debug address registers. But if | |
5789 | * we have some of them active, restore the old state. | |
5790 | */ | |
59d8eb53 | 5791 | if (hw_breakpoint_active()) |
24f1e32c | 5792 | hw_breakpoint_restore(); |
42dbaa5a | 5793 | |
d5c1785d | 5794 | vcpu->arch.last_guest_tsc = kvm_x86_ops->read_l1_tsc(vcpu); |
1d5f066e | 5795 | |
6b7e2d09 | 5796 | vcpu->mode = OUTSIDE_GUEST_MODE; |
d94e1dc9 | 5797 | smp_wmb(); |
b6c7a5dc HB |
5798 | local_irq_enable(); |
5799 | ||
5800 | ++vcpu->stat.exits; | |
5801 | ||
5802 | /* | |
5803 | * We must have an instruction between local_irq_enable() and | |
5804 | * kvm_guest_exit(), so the timer interrupt isn't delayed by | |
5805 | * the interrupt shadow. The stat.exits increment will do nicely. | |
5806 | * But we need to prevent reordering, hence this barrier(): | |
5807 | */ | |
5808 | barrier(); | |
5809 | ||
5810 | kvm_guest_exit(); | |
5811 | ||
5812 | preempt_enable(); | |
5813 | ||
f656ce01 | 5814 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
3200f405 | 5815 | |
b6c7a5dc HB |
5816 | /* |
5817 | * Profile KVM exit RIPs: | |
5818 | */ | |
5819 | if (unlikely(prof_on == KVM_PROFILING)) { | |
5fdbf976 MT |
5820 | unsigned long rip = kvm_rip_read(vcpu); |
5821 | profile_hit(KVM_PROFILING, (void *)rip); | |
b6c7a5dc HB |
5822 | } |
5823 | ||
298101da | 5824 | |
b93463aa AK |
5825 | kvm_lapic_sync_from_vapic(vcpu); |
5826 | ||
851ba692 | 5827 | r = kvm_x86_ops->handle_exit(vcpu); |
d7690175 MT |
5828 | out: |
5829 | return r; | |
5830 | } | |
b6c7a5dc | 5831 | |
09cec754 | 5832 | |
851ba692 | 5833 | static int __vcpu_run(struct kvm_vcpu *vcpu) |
d7690175 MT |
5834 | { |
5835 | int r; | |
f656ce01 | 5836 | struct kvm *kvm = vcpu->kvm; |
d7690175 MT |
5837 | |
5838 | if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_SIPI_RECEIVED)) { | |
1b10bf31 JK |
5839 | pr_debug("vcpu %d received sipi with vector # %x\n", |
5840 | vcpu->vcpu_id, vcpu->arch.sipi_vector); | |
d7690175 | 5841 | kvm_lapic_reset(vcpu); |
5f179287 | 5842 | r = kvm_arch_vcpu_reset(vcpu); |
d7690175 MT |
5843 | if (r) |
5844 | return r; | |
5845 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; | |
b6c7a5dc HB |
5846 | } |
5847 | ||
f656ce01 | 5848 | vcpu->srcu_idx = srcu_read_lock(&kvm->srcu); |
d7690175 MT |
5849 | vapic_enter(vcpu); |
5850 | ||
5851 | r = 1; | |
5852 | while (r > 0) { | |
af585b92 GN |
5853 | if (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE && |
5854 | !vcpu->arch.apf.halted) | |
851ba692 | 5855 | r = vcpu_enter_guest(vcpu); |
d7690175 | 5856 | else { |
f656ce01 | 5857 | srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx); |
d7690175 | 5858 | kvm_vcpu_block(vcpu); |
f656ce01 | 5859 | vcpu->srcu_idx = srcu_read_lock(&kvm->srcu); |
a8eeb04a | 5860 | if (kvm_check_request(KVM_REQ_UNHALT, vcpu)) |
09cec754 GN |
5861 | { |
5862 | switch(vcpu->arch.mp_state) { | |
5863 | case KVM_MP_STATE_HALTED: | |
d7690175 | 5864 | vcpu->arch.mp_state = |
09cec754 GN |
5865 | KVM_MP_STATE_RUNNABLE; |
5866 | case KVM_MP_STATE_RUNNABLE: | |
af585b92 | 5867 | vcpu->arch.apf.halted = false; |
09cec754 GN |
5868 | break; |
5869 | case KVM_MP_STATE_SIPI_RECEIVED: | |
5870 | default: | |
5871 | r = -EINTR; | |
5872 | break; | |
5873 | } | |
5874 | } | |
d7690175 MT |
5875 | } |
5876 | ||
09cec754 GN |
5877 | if (r <= 0) |
5878 | break; | |
5879 | ||
5880 | clear_bit(KVM_REQ_PENDING_TIMER, &vcpu->requests); | |
5881 | if (kvm_cpu_has_pending_timer(vcpu)) | |
5882 | kvm_inject_pending_timer_irqs(vcpu); | |
5883 | ||
851ba692 | 5884 | if (dm_request_for_irq_injection(vcpu)) { |
09cec754 | 5885 | r = -EINTR; |
851ba692 | 5886 | vcpu->run->exit_reason = KVM_EXIT_INTR; |
09cec754 GN |
5887 | ++vcpu->stat.request_irq_exits; |
5888 | } | |
af585b92 GN |
5889 | |
5890 | kvm_check_async_pf_completion(vcpu); | |
5891 | ||
09cec754 GN |
5892 | if (signal_pending(current)) { |
5893 | r = -EINTR; | |
851ba692 | 5894 | vcpu->run->exit_reason = KVM_EXIT_INTR; |
09cec754 GN |
5895 | ++vcpu->stat.signal_exits; |
5896 | } | |
5897 | if (need_resched()) { | |
f656ce01 | 5898 | srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx); |
09cec754 | 5899 | kvm_resched(vcpu); |
f656ce01 | 5900 | vcpu->srcu_idx = srcu_read_lock(&kvm->srcu); |
d7690175 | 5901 | } |
b6c7a5dc HB |
5902 | } |
5903 | ||
f656ce01 | 5904 | srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx); |
b6c7a5dc | 5905 | |
b93463aa AK |
5906 | vapic_exit(vcpu); |
5907 | ||
b6c7a5dc HB |
5908 | return r; |
5909 | } | |
5910 | ||
5287f194 AK |
5911 | static int complete_mmio(struct kvm_vcpu *vcpu) |
5912 | { | |
5913 | struct kvm_run *run = vcpu->run; | |
5914 | int r; | |
5915 | ||
5916 | if (!(vcpu->arch.pio.count || vcpu->mmio_needed)) | |
5917 | return 1; | |
5918 | ||
5919 | if (vcpu->mmio_needed) { | |
5287f194 | 5920 | vcpu->mmio_needed = 0; |
cef4dea0 | 5921 | if (!vcpu->mmio_is_write) |
0004c7c2 GN |
5922 | memcpy(vcpu->mmio_data + vcpu->mmio_index, |
5923 | run->mmio.data, 8); | |
cef4dea0 AK |
5924 | vcpu->mmio_index += 8; |
5925 | if (vcpu->mmio_index < vcpu->mmio_size) { | |
5926 | run->exit_reason = KVM_EXIT_MMIO; | |
5927 | run->mmio.phys_addr = vcpu->mmio_phys_addr + vcpu->mmio_index; | |
5928 | memcpy(run->mmio.data, vcpu->mmio_data + vcpu->mmio_index, 8); | |
5929 | run->mmio.len = min(vcpu->mmio_size - vcpu->mmio_index, 8); | |
5930 | run->mmio.is_write = vcpu->mmio_is_write; | |
5931 | vcpu->mmio_needed = 1; | |
5932 | return 0; | |
5933 | } | |
5934 | if (vcpu->mmio_is_write) | |
5935 | return 1; | |
5936 | vcpu->mmio_read_completed = 1; | |
5287f194 AK |
5937 | } |
5938 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); | |
5939 | r = emulate_instruction(vcpu, EMULTYPE_NO_DECODE); | |
5940 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); | |
5941 | if (r != EMULATE_DONE) | |
5942 | return 0; | |
5943 | return 1; | |
5944 | } | |
5945 | ||
b6c7a5dc HB |
5946 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
5947 | { | |
5948 | int r; | |
5949 | sigset_t sigsaved; | |
5950 | ||
e5c30142 AK |
5951 | if (!tsk_used_math(current) && init_fpu(current)) |
5952 | return -ENOMEM; | |
5953 | ||
ac9f6dc0 AK |
5954 | if (vcpu->sigset_active) |
5955 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
5956 | ||
a4535290 | 5957 | if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)) { |
b6c7a5dc | 5958 | kvm_vcpu_block(vcpu); |
d7690175 | 5959 | clear_bit(KVM_REQ_UNHALT, &vcpu->requests); |
ac9f6dc0 AK |
5960 | r = -EAGAIN; |
5961 | goto out; | |
b6c7a5dc HB |
5962 | } |
5963 | ||
b6c7a5dc | 5964 | /* re-sync apic's tpr */ |
eea1cff9 AP |
5965 | if (!irqchip_in_kernel(vcpu->kvm)) { |
5966 | if (kvm_set_cr8(vcpu, kvm_run->cr8) != 0) { | |
5967 | r = -EINVAL; | |
5968 | goto out; | |
5969 | } | |
5970 | } | |
b6c7a5dc | 5971 | |
5287f194 AK |
5972 | r = complete_mmio(vcpu); |
5973 | if (r <= 0) | |
5974 | goto out; | |
5975 | ||
5fdbf976 MT |
5976 | if (kvm_run->exit_reason == KVM_EXIT_HYPERCALL) |
5977 | kvm_register_write(vcpu, VCPU_REGS_RAX, | |
5978 | kvm_run->hypercall.ret); | |
b6c7a5dc | 5979 | |
851ba692 | 5980 | r = __vcpu_run(vcpu); |
b6c7a5dc HB |
5981 | |
5982 | out: | |
f1d86e46 | 5983 | post_kvm_run_save(vcpu); |
b6c7a5dc HB |
5984 | if (vcpu->sigset_active) |
5985 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
5986 | ||
b6c7a5dc HB |
5987 | return r; |
5988 | } | |
5989 | ||
5990 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
5991 | { | |
7ae441ea GN |
5992 | if (vcpu->arch.emulate_regs_need_sync_to_vcpu) { |
5993 | /* | |
5994 | * We are here if userspace calls get_regs() in the middle of | |
5995 | * instruction emulation. Registers state needs to be copied | |
5996 | * back from emulation context to vcpu. Usrapace shouldn't do | |
5997 | * that usually, but some bad designed PV devices (vmware | |
5998 | * backdoor interface) need this to work | |
5999 | */ | |
9dac77fa AK |
6000 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; |
6001 | memcpy(vcpu->arch.regs, ctxt->regs, sizeof ctxt->regs); | |
7ae441ea GN |
6002 | vcpu->arch.emulate_regs_need_sync_to_vcpu = false; |
6003 | } | |
5fdbf976 MT |
6004 | regs->rax = kvm_register_read(vcpu, VCPU_REGS_RAX); |
6005 | regs->rbx = kvm_register_read(vcpu, VCPU_REGS_RBX); | |
6006 | regs->rcx = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
6007 | regs->rdx = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
6008 | regs->rsi = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
6009 | regs->rdi = kvm_register_read(vcpu, VCPU_REGS_RDI); | |
6010 | regs->rsp = kvm_register_read(vcpu, VCPU_REGS_RSP); | |
6011 | regs->rbp = kvm_register_read(vcpu, VCPU_REGS_RBP); | |
b6c7a5dc | 6012 | #ifdef CONFIG_X86_64 |
5fdbf976 MT |
6013 | regs->r8 = kvm_register_read(vcpu, VCPU_REGS_R8); |
6014 | regs->r9 = kvm_register_read(vcpu, VCPU_REGS_R9); | |
6015 | regs->r10 = kvm_register_read(vcpu, VCPU_REGS_R10); | |
6016 | regs->r11 = kvm_register_read(vcpu, VCPU_REGS_R11); | |
6017 | regs->r12 = kvm_register_read(vcpu, VCPU_REGS_R12); | |
6018 | regs->r13 = kvm_register_read(vcpu, VCPU_REGS_R13); | |
6019 | regs->r14 = kvm_register_read(vcpu, VCPU_REGS_R14); | |
6020 | regs->r15 = kvm_register_read(vcpu, VCPU_REGS_R15); | |
b6c7a5dc HB |
6021 | #endif |
6022 | ||
5fdbf976 | 6023 | regs->rip = kvm_rip_read(vcpu); |
91586a3b | 6024 | regs->rflags = kvm_get_rflags(vcpu); |
b6c7a5dc | 6025 | |
b6c7a5dc HB |
6026 | return 0; |
6027 | } | |
6028 | ||
6029 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
6030 | { | |
7ae441ea GN |
6031 | vcpu->arch.emulate_regs_need_sync_from_vcpu = true; |
6032 | vcpu->arch.emulate_regs_need_sync_to_vcpu = false; | |
6033 | ||
5fdbf976 MT |
6034 | kvm_register_write(vcpu, VCPU_REGS_RAX, regs->rax); |
6035 | kvm_register_write(vcpu, VCPU_REGS_RBX, regs->rbx); | |
6036 | kvm_register_write(vcpu, VCPU_REGS_RCX, regs->rcx); | |
6037 | kvm_register_write(vcpu, VCPU_REGS_RDX, regs->rdx); | |
6038 | kvm_register_write(vcpu, VCPU_REGS_RSI, regs->rsi); | |
6039 | kvm_register_write(vcpu, VCPU_REGS_RDI, regs->rdi); | |
6040 | kvm_register_write(vcpu, VCPU_REGS_RSP, regs->rsp); | |
6041 | kvm_register_write(vcpu, VCPU_REGS_RBP, regs->rbp); | |
b6c7a5dc | 6042 | #ifdef CONFIG_X86_64 |
5fdbf976 MT |
6043 | kvm_register_write(vcpu, VCPU_REGS_R8, regs->r8); |
6044 | kvm_register_write(vcpu, VCPU_REGS_R9, regs->r9); | |
6045 | kvm_register_write(vcpu, VCPU_REGS_R10, regs->r10); | |
6046 | kvm_register_write(vcpu, VCPU_REGS_R11, regs->r11); | |
6047 | kvm_register_write(vcpu, VCPU_REGS_R12, regs->r12); | |
6048 | kvm_register_write(vcpu, VCPU_REGS_R13, regs->r13); | |
6049 | kvm_register_write(vcpu, VCPU_REGS_R14, regs->r14); | |
6050 | kvm_register_write(vcpu, VCPU_REGS_R15, regs->r15); | |
b6c7a5dc HB |
6051 | #endif |
6052 | ||
5fdbf976 | 6053 | kvm_rip_write(vcpu, regs->rip); |
91586a3b | 6054 | kvm_set_rflags(vcpu, regs->rflags); |
b6c7a5dc | 6055 | |
b4f14abd JK |
6056 | vcpu->arch.exception.pending = false; |
6057 | ||
3842d135 AK |
6058 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
6059 | ||
b6c7a5dc HB |
6060 | return 0; |
6061 | } | |
6062 | ||
b6c7a5dc HB |
6063 | void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l) |
6064 | { | |
6065 | struct kvm_segment cs; | |
6066 | ||
3e6e0aab | 6067 | kvm_get_segment(vcpu, &cs, VCPU_SREG_CS); |
b6c7a5dc HB |
6068 | *db = cs.db; |
6069 | *l = cs.l; | |
6070 | } | |
6071 | EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits); | |
6072 | ||
6073 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, | |
6074 | struct kvm_sregs *sregs) | |
6075 | { | |
89a27f4d | 6076 | struct desc_ptr dt; |
b6c7a5dc | 6077 | |
3e6e0aab GT |
6078 | kvm_get_segment(vcpu, &sregs->cs, VCPU_SREG_CS); |
6079 | kvm_get_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
6080 | kvm_get_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
6081 | kvm_get_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
6082 | kvm_get_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
6083 | kvm_get_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
b6c7a5dc | 6084 | |
3e6e0aab GT |
6085 | kvm_get_segment(vcpu, &sregs->tr, VCPU_SREG_TR); |
6086 | kvm_get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
b6c7a5dc HB |
6087 | |
6088 | kvm_x86_ops->get_idt(vcpu, &dt); | |
89a27f4d GN |
6089 | sregs->idt.limit = dt.size; |
6090 | sregs->idt.base = dt.address; | |
b6c7a5dc | 6091 | kvm_x86_ops->get_gdt(vcpu, &dt); |
89a27f4d GN |
6092 | sregs->gdt.limit = dt.size; |
6093 | sregs->gdt.base = dt.address; | |
b6c7a5dc | 6094 | |
4d4ec087 | 6095 | sregs->cr0 = kvm_read_cr0(vcpu); |
ad312c7c | 6096 | sregs->cr2 = vcpu->arch.cr2; |
9f8fe504 | 6097 | sregs->cr3 = kvm_read_cr3(vcpu); |
fc78f519 | 6098 | sregs->cr4 = kvm_read_cr4(vcpu); |
2d3ad1f4 | 6099 | sregs->cr8 = kvm_get_cr8(vcpu); |
f6801dff | 6100 | sregs->efer = vcpu->arch.efer; |
b6c7a5dc HB |
6101 | sregs->apic_base = kvm_get_apic_base(vcpu); |
6102 | ||
923c61bb | 6103 | memset(sregs->interrupt_bitmap, 0, sizeof sregs->interrupt_bitmap); |
b6c7a5dc | 6104 | |
36752c9b | 6105 | if (vcpu->arch.interrupt.pending && !vcpu->arch.interrupt.soft) |
14d0bc1f GN |
6106 | set_bit(vcpu->arch.interrupt.nr, |
6107 | (unsigned long *)sregs->interrupt_bitmap); | |
16d7a191 | 6108 | |
b6c7a5dc HB |
6109 | return 0; |
6110 | } | |
6111 | ||
62d9f0db MT |
6112 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
6113 | struct kvm_mp_state *mp_state) | |
6114 | { | |
62d9f0db | 6115 | mp_state->mp_state = vcpu->arch.mp_state; |
62d9f0db MT |
6116 | return 0; |
6117 | } | |
6118 | ||
6119 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
6120 | struct kvm_mp_state *mp_state) | |
6121 | { | |
62d9f0db | 6122 | vcpu->arch.mp_state = mp_state->mp_state; |
3842d135 | 6123 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
62d9f0db MT |
6124 | return 0; |
6125 | } | |
6126 | ||
e269fb21 JK |
6127 | int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int reason, |
6128 | bool has_error_code, u32 error_code) | |
b6c7a5dc | 6129 | { |
9d74191a | 6130 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; |
8ec4722d | 6131 | int ret; |
e01c2426 | 6132 | |
8ec4722d | 6133 | init_emulate_ctxt(vcpu); |
c697518a | 6134 | |
9d74191a TY |
6135 | ret = emulator_task_switch(ctxt, tss_selector, reason, |
6136 | has_error_code, error_code); | |
c697518a | 6137 | |
c697518a | 6138 | if (ret) |
19d04437 | 6139 | return EMULATE_FAIL; |
37817f29 | 6140 | |
9dac77fa | 6141 | memcpy(vcpu->arch.regs, ctxt->regs, sizeof ctxt->regs); |
9d74191a TY |
6142 | kvm_rip_write(vcpu, ctxt->eip); |
6143 | kvm_set_rflags(vcpu, ctxt->eflags); | |
3842d135 | 6144 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
19d04437 | 6145 | return EMULATE_DONE; |
37817f29 IE |
6146 | } |
6147 | EXPORT_SYMBOL_GPL(kvm_task_switch); | |
6148 | ||
b6c7a5dc HB |
6149 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, |
6150 | struct kvm_sregs *sregs) | |
6151 | { | |
6152 | int mmu_reset_needed = 0; | |
63f42e02 | 6153 | int pending_vec, max_bits, idx; |
89a27f4d | 6154 | struct desc_ptr dt; |
b6c7a5dc | 6155 | |
89a27f4d GN |
6156 | dt.size = sregs->idt.limit; |
6157 | dt.address = sregs->idt.base; | |
b6c7a5dc | 6158 | kvm_x86_ops->set_idt(vcpu, &dt); |
89a27f4d GN |
6159 | dt.size = sregs->gdt.limit; |
6160 | dt.address = sregs->gdt.base; | |
b6c7a5dc HB |
6161 | kvm_x86_ops->set_gdt(vcpu, &dt); |
6162 | ||
ad312c7c | 6163 | vcpu->arch.cr2 = sregs->cr2; |
9f8fe504 | 6164 | mmu_reset_needed |= kvm_read_cr3(vcpu) != sregs->cr3; |
dc7e795e | 6165 | vcpu->arch.cr3 = sregs->cr3; |
aff48baa | 6166 | __set_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail); |
b6c7a5dc | 6167 | |
2d3ad1f4 | 6168 | kvm_set_cr8(vcpu, sregs->cr8); |
b6c7a5dc | 6169 | |
f6801dff | 6170 | mmu_reset_needed |= vcpu->arch.efer != sregs->efer; |
b6c7a5dc | 6171 | kvm_x86_ops->set_efer(vcpu, sregs->efer); |
b6c7a5dc HB |
6172 | kvm_set_apic_base(vcpu, sregs->apic_base); |
6173 | ||
4d4ec087 | 6174 | mmu_reset_needed |= kvm_read_cr0(vcpu) != sregs->cr0; |
b6c7a5dc | 6175 | kvm_x86_ops->set_cr0(vcpu, sregs->cr0); |
d7306163 | 6176 | vcpu->arch.cr0 = sregs->cr0; |
b6c7a5dc | 6177 | |
fc78f519 | 6178 | mmu_reset_needed |= kvm_read_cr4(vcpu) != sregs->cr4; |
b6c7a5dc | 6179 | kvm_x86_ops->set_cr4(vcpu, sregs->cr4); |
3ea3aa8c SY |
6180 | if (sregs->cr4 & X86_CR4_OSXSAVE) |
6181 | update_cpuid(vcpu); | |
63f42e02 XG |
6182 | |
6183 | idx = srcu_read_lock(&vcpu->kvm->srcu); | |
7c93be44 | 6184 | if (!is_long_mode(vcpu) && is_pae(vcpu)) { |
9f8fe504 | 6185 | load_pdptrs(vcpu, vcpu->arch.walk_mmu, kvm_read_cr3(vcpu)); |
7c93be44 MT |
6186 | mmu_reset_needed = 1; |
6187 | } | |
63f42e02 | 6188 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
b6c7a5dc HB |
6189 | |
6190 | if (mmu_reset_needed) | |
6191 | kvm_mmu_reset_context(vcpu); | |
6192 | ||
923c61bb GN |
6193 | max_bits = (sizeof sregs->interrupt_bitmap) << 3; |
6194 | pending_vec = find_first_bit( | |
6195 | (const unsigned long *)sregs->interrupt_bitmap, max_bits); | |
6196 | if (pending_vec < max_bits) { | |
66fd3f7f | 6197 | kvm_queue_interrupt(vcpu, pending_vec, false); |
923c61bb | 6198 | pr_debug("Set back pending irq %d\n", pending_vec); |
b6c7a5dc HB |
6199 | } |
6200 | ||
3e6e0aab GT |
6201 | kvm_set_segment(vcpu, &sregs->cs, VCPU_SREG_CS); |
6202 | kvm_set_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
6203 | kvm_set_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
6204 | kvm_set_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
6205 | kvm_set_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
6206 | kvm_set_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
b6c7a5dc | 6207 | |
3e6e0aab GT |
6208 | kvm_set_segment(vcpu, &sregs->tr, VCPU_SREG_TR); |
6209 | kvm_set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
b6c7a5dc | 6210 | |
5f0269f5 ME |
6211 | update_cr8_intercept(vcpu); |
6212 | ||
9c3e4aab | 6213 | /* Older userspace won't unhalt the vcpu on reset. */ |
c5af89b6 | 6214 | if (kvm_vcpu_is_bsp(vcpu) && kvm_rip_read(vcpu) == 0xfff0 && |
9c3e4aab | 6215 | sregs->cs.selector == 0xf000 && sregs->cs.base == 0xffff0000 && |
3eeb3288 | 6216 | !is_protmode(vcpu)) |
9c3e4aab MT |
6217 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
6218 | ||
3842d135 AK |
6219 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
6220 | ||
b6c7a5dc HB |
6221 | return 0; |
6222 | } | |
6223 | ||
d0bfb940 JK |
6224 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
6225 | struct kvm_guest_debug *dbg) | |
b6c7a5dc | 6226 | { |
355be0b9 | 6227 | unsigned long rflags; |
ae675ef0 | 6228 | int i, r; |
b6c7a5dc | 6229 | |
4f926bf2 JK |
6230 | if (dbg->control & (KVM_GUESTDBG_INJECT_DB | KVM_GUESTDBG_INJECT_BP)) { |
6231 | r = -EBUSY; | |
6232 | if (vcpu->arch.exception.pending) | |
2122ff5e | 6233 | goto out; |
4f926bf2 JK |
6234 | if (dbg->control & KVM_GUESTDBG_INJECT_DB) |
6235 | kvm_queue_exception(vcpu, DB_VECTOR); | |
6236 | else | |
6237 | kvm_queue_exception(vcpu, BP_VECTOR); | |
6238 | } | |
6239 | ||
91586a3b JK |
6240 | /* |
6241 | * Read rflags as long as potentially injected trace flags are still | |
6242 | * filtered out. | |
6243 | */ | |
6244 | rflags = kvm_get_rflags(vcpu); | |
355be0b9 JK |
6245 | |
6246 | vcpu->guest_debug = dbg->control; | |
6247 | if (!(vcpu->guest_debug & KVM_GUESTDBG_ENABLE)) | |
6248 | vcpu->guest_debug = 0; | |
6249 | ||
6250 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) { | |
ae675ef0 JK |
6251 | for (i = 0; i < KVM_NR_DB_REGS; ++i) |
6252 | vcpu->arch.eff_db[i] = dbg->arch.debugreg[i]; | |
6253 | vcpu->arch.switch_db_regs = | |
6254 | (dbg->arch.debugreg[7] & DR7_BP_EN_MASK); | |
6255 | } else { | |
6256 | for (i = 0; i < KVM_NR_DB_REGS; i++) | |
6257 | vcpu->arch.eff_db[i] = vcpu->arch.db[i]; | |
6258 | vcpu->arch.switch_db_regs = (vcpu->arch.dr7 & DR7_BP_EN_MASK); | |
6259 | } | |
6260 | ||
f92653ee JK |
6261 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) |
6262 | vcpu->arch.singlestep_rip = kvm_rip_read(vcpu) + | |
6263 | get_segment_base(vcpu, VCPU_SREG_CS); | |
94fe45da | 6264 | |
91586a3b JK |
6265 | /* |
6266 | * Trigger an rflags update that will inject or remove the trace | |
6267 | * flags. | |
6268 | */ | |
6269 | kvm_set_rflags(vcpu, rflags); | |
b6c7a5dc | 6270 | |
355be0b9 | 6271 | kvm_x86_ops->set_guest_debug(vcpu, dbg); |
b6c7a5dc | 6272 | |
4f926bf2 | 6273 | r = 0; |
d0bfb940 | 6274 | |
2122ff5e | 6275 | out: |
b6c7a5dc HB |
6276 | |
6277 | return r; | |
6278 | } | |
6279 | ||
8b006791 ZX |
6280 | /* |
6281 | * Translate a guest virtual address to a guest physical address. | |
6282 | */ | |
6283 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, | |
6284 | struct kvm_translation *tr) | |
6285 | { | |
6286 | unsigned long vaddr = tr->linear_address; | |
6287 | gpa_t gpa; | |
f656ce01 | 6288 | int idx; |
8b006791 | 6289 | |
f656ce01 | 6290 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
1871c602 | 6291 | gpa = kvm_mmu_gva_to_gpa_system(vcpu, vaddr, NULL); |
f656ce01 | 6292 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
8b006791 ZX |
6293 | tr->physical_address = gpa; |
6294 | tr->valid = gpa != UNMAPPED_GVA; | |
6295 | tr->writeable = 1; | |
6296 | tr->usermode = 0; | |
8b006791 ZX |
6297 | |
6298 | return 0; | |
6299 | } | |
6300 | ||
d0752060 HB |
6301 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) |
6302 | { | |
98918833 SY |
6303 | struct i387_fxsave_struct *fxsave = |
6304 | &vcpu->arch.guest_fpu.state->fxsave; | |
d0752060 | 6305 | |
d0752060 HB |
6306 | memcpy(fpu->fpr, fxsave->st_space, 128); |
6307 | fpu->fcw = fxsave->cwd; | |
6308 | fpu->fsw = fxsave->swd; | |
6309 | fpu->ftwx = fxsave->twd; | |
6310 | fpu->last_opcode = fxsave->fop; | |
6311 | fpu->last_ip = fxsave->rip; | |
6312 | fpu->last_dp = fxsave->rdp; | |
6313 | memcpy(fpu->xmm, fxsave->xmm_space, sizeof fxsave->xmm_space); | |
6314 | ||
d0752060 HB |
6315 | return 0; |
6316 | } | |
6317 | ||
6318 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
6319 | { | |
98918833 SY |
6320 | struct i387_fxsave_struct *fxsave = |
6321 | &vcpu->arch.guest_fpu.state->fxsave; | |
d0752060 | 6322 | |
d0752060 HB |
6323 | memcpy(fxsave->st_space, fpu->fpr, 128); |
6324 | fxsave->cwd = fpu->fcw; | |
6325 | fxsave->swd = fpu->fsw; | |
6326 | fxsave->twd = fpu->ftwx; | |
6327 | fxsave->fop = fpu->last_opcode; | |
6328 | fxsave->rip = fpu->last_ip; | |
6329 | fxsave->rdp = fpu->last_dp; | |
6330 | memcpy(fxsave->xmm_space, fpu->xmm, sizeof fxsave->xmm_space); | |
6331 | ||
d0752060 HB |
6332 | return 0; |
6333 | } | |
6334 | ||
10ab25cd | 6335 | int fx_init(struct kvm_vcpu *vcpu) |
d0752060 | 6336 | { |
10ab25cd JK |
6337 | int err; |
6338 | ||
6339 | err = fpu_alloc(&vcpu->arch.guest_fpu); | |
6340 | if (err) | |
6341 | return err; | |
6342 | ||
98918833 | 6343 | fpu_finit(&vcpu->arch.guest_fpu); |
d0752060 | 6344 | |
2acf923e DC |
6345 | /* |
6346 | * Ensure guest xcr0 is valid for loading | |
6347 | */ | |
6348 | vcpu->arch.xcr0 = XSTATE_FP; | |
6349 | ||
ad312c7c | 6350 | vcpu->arch.cr0 |= X86_CR0_ET; |
10ab25cd JK |
6351 | |
6352 | return 0; | |
d0752060 HB |
6353 | } |
6354 | EXPORT_SYMBOL_GPL(fx_init); | |
6355 | ||
98918833 SY |
6356 | static void fx_free(struct kvm_vcpu *vcpu) |
6357 | { | |
6358 | fpu_free(&vcpu->arch.guest_fpu); | |
6359 | } | |
6360 | ||
d0752060 HB |
6361 | void kvm_load_guest_fpu(struct kvm_vcpu *vcpu) |
6362 | { | |
2608d7a1 | 6363 | if (vcpu->guest_fpu_loaded) |
d0752060 HB |
6364 | return; |
6365 | ||
2acf923e DC |
6366 | /* |
6367 | * Restore all possible states in the guest, | |
6368 | * and assume host would use all available bits. | |
6369 | * Guest xcr0 would be loaded later. | |
6370 | */ | |
6371 | kvm_put_guest_xcr0(vcpu); | |
d0752060 | 6372 | vcpu->guest_fpu_loaded = 1; |
7cf30855 | 6373 | unlazy_fpu(current); |
98918833 | 6374 | fpu_restore_checking(&vcpu->arch.guest_fpu); |
0c04851c | 6375 | trace_kvm_fpu(1); |
d0752060 | 6376 | } |
d0752060 HB |
6377 | |
6378 | void kvm_put_guest_fpu(struct kvm_vcpu *vcpu) | |
6379 | { | |
2acf923e DC |
6380 | kvm_put_guest_xcr0(vcpu); |
6381 | ||
d0752060 HB |
6382 | if (!vcpu->guest_fpu_loaded) |
6383 | return; | |
6384 | ||
6385 | vcpu->guest_fpu_loaded = 0; | |
98918833 | 6386 | fpu_save_init(&vcpu->arch.guest_fpu); |
f096ed85 | 6387 | ++vcpu->stat.fpu_reload; |
a8eeb04a | 6388 | kvm_make_request(KVM_REQ_DEACTIVATE_FPU, vcpu); |
0c04851c | 6389 | trace_kvm_fpu(0); |
d0752060 | 6390 | } |
e9b11c17 ZX |
6391 | |
6392 | void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu) | |
6393 | { | |
12f9a48f | 6394 | kvmclock_reset(vcpu); |
7f1ea208 | 6395 | |
f5f48ee1 | 6396 | free_cpumask_var(vcpu->arch.wbinvd_dirty_mask); |
98918833 | 6397 | fx_free(vcpu); |
e9b11c17 ZX |
6398 | kvm_x86_ops->vcpu_free(vcpu); |
6399 | } | |
6400 | ||
6401 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, | |
6402 | unsigned int id) | |
6403 | { | |
6755bae8 ZA |
6404 | if (check_tsc_unstable() && atomic_read(&kvm->online_vcpus) != 0) |
6405 | printk_once(KERN_WARNING | |
6406 | "kvm: SMP vm created on host with unstable TSC; " | |
6407 | "guest TSC will not be reliable\n"); | |
26e5215f AK |
6408 | return kvm_x86_ops->vcpu_create(kvm, id); |
6409 | } | |
e9b11c17 | 6410 | |
26e5215f AK |
6411 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) |
6412 | { | |
6413 | int r; | |
e9b11c17 | 6414 | |
0bed3b56 | 6415 | vcpu->arch.mtrr_state.have_fixed = 1; |
e9b11c17 ZX |
6416 | vcpu_load(vcpu); |
6417 | r = kvm_arch_vcpu_reset(vcpu); | |
6418 | if (r == 0) | |
6419 | r = kvm_mmu_setup(vcpu); | |
6420 | vcpu_put(vcpu); | |
e9b11c17 | 6421 | |
26e5215f | 6422 | return r; |
e9b11c17 ZX |
6423 | } |
6424 | ||
d40ccc62 | 6425 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
e9b11c17 | 6426 | { |
344d9588 GN |
6427 | vcpu->arch.apf.msr_val = 0; |
6428 | ||
e9b11c17 ZX |
6429 | vcpu_load(vcpu); |
6430 | kvm_mmu_unload(vcpu); | |
6431 | vcpu_put(vcpu); | |
6432 | ||
98918833 | 6433 | fx_free(vcpu); |
e9b11c17 ZX |
6434 | kvm_x86_ops->vcpu_free(vcpu); |
6435 | } | |
6436 | ||
6437 | int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu) | |
6438 | { | |
7460fb4a AK |
6439 | atomic_set(&vcpu->arch.nmi_queued, 0); |
6440 | vcpu->arch.nmi_pending = 0; | |
448fa4a9 JK |
6441 | vcpu->arch.nmi_injected = false; |
6442 | ||
42dbaa5a JK |
6443 | vcpu->arch.switch_db_regs = 0; |
6444 | memset(vcpu->arch.db, 0, sizeof(vcpu->arch.db)); | |
6445 | vcpu->arch.dr6 = DR6_FIXED_1; | |
6446 | vcpu->arch.dr7 = DR7_FIXED_1; | |
6447 | ||
3842d135 | 6448 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
344d9588 | 6449 | vcpu->arch.apf.msr_val = 0; |
c9aaa895 | 6450 | vcpu->arch.st.msr_val = 0; |
3842d135 | 6451 | |
12f9a48f GC |
6452 | kvmclock_reset(vcpu); |
6453 | ||
af585b92 GN |
6454 | kvm_clear_async_pf_completion_queue(vcpu); |
6455 | kvm_async_pf_hash_reset(vcpu); | |
6456 | vcpu->arch.apf.halted = false; | |
3842d135 | 6457 | |
e9b11c17 ZX |
6458 | return kvm_x86_ops->vcpu_reset(vcpu); |
6459 | } | |
6460 | ||
10474ae8 | 6461 | int kvm_arch_hardware_enable(void *garbage) |
e9b11c17 | 6462 | { |
ca84d1a2 ZA |
6463 | struct kvm *kvm; |
6464 | struct kvm_vcpu *vcpu; | |
6465 | int i; | |
18863bdd AK |
6466 | |
6467 | kvm_shared_msr_cpu_online(); | |
ca84d1a2 ZA |
6468 | list_for_each_entry(kvm, &vm_list, vm_list) |
6469 | kvm_for_each_vcpu(i, vcpu, kvm) | |
6470 | if (vcpu->cpu == smp_processor_id()) | |
c285545f | 6471 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
10474ae8 | 6472 | return kvm_x86_ops->hardware_enable(garbage); |
e9b11c17 ZX |
6473 | } |
6474 | ||
6475 | void kvm_arch_hardware_disable(void *garbage) | |
6476 | { | |
6477 | kvm_x86_ops->hardware_disable(garbage); | |
3548bab5 | 6478 | drop_user_return_notifiers(garbage); |
e9b11c17 ZX |
6479 | } |
6480 | ||
6481 | int kvm_arch_hardware_setup(void) | |
6482 | { | |
6483 | return kvm_x86_ops->hardware_setup(); | |
6484 | } | |
6485 | ||
6486 | void kvm_arch_hardware_unsetup(void) | |
6487 | { | |
6488 | kvm_x86_ops->hardware_unsetup(); | |
6489 | } | |
6490 | ||
6491 | void kvm_arch_check_processor_compat(void *rtn) | |
6492 | { | |
6493 | kvm_x86_ops->check_processor_compatibility(rtn); | |
6494 | } | |
6495 | ||
6496 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) | |
6497 | { | |
6498 | struct page *page; | |
6499 | struct kvm *kvm; | |
6500 | int r; | |
6501 | ||
6502 | BUG_ON(vcpu->kvm == NULL); | |
6503 | kvm = vcpu->kvm; | |
6504 | ||
9aabc88f | 6505 | vcpu->arch.emulate_ctxt.ops = &emulate_ops; |
14dfe855 | 6506 | vcpu->arch.walk_mmu = &vcpu->arch.mmu; |
ad312c7c | 6507 | vcpu->arch.mmu.root_hpa = INVALID_PAGE; |
c30a358d | 6508 | vcpu->arch.mmu.translate_gpa = translate_gpa; |
02f59dc9 | 6509 | vcpu->arch.nested_mmu.translate_gpa = translate_nested_gpa; |
c5af89b6 | 6510 | if (!irqchip_in_kernel(kvm) || kvm_vcpu_is_bsp(vcpu)) |
a4535290 | 6511 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
e9b11c17 | 6512 | else |
a4535290 | 6513 | vcpu->arch.mp_state = KVM_MP_STATE_UNINITIALIZED; |
e9b11c17 ZX |
6514 | |
6515 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
6516 | if (!page) { | |
6517 | r = -ENOMEM; | |
6518 | goto fail; | |
6519 | } | |
ad312c7c | 6520 | vcpu->arch.pio_data = page_address(page); |
e9b11c17 | 6521 | |
1e993611 | 6522 | kvm_init_tsc_catchup(vcpu, max_tsc_khz); |
c285545f | 6523 | |
e9b11c17 ZX |
6524 | r = kvm_mmu_create(vcpu); |
6525 | if (r < 0) | |
6526 | goto fail_free_pio_data; | |
6527 | ||
6528 | if (irqchip_in_kernel(kvm)) { | |
6529 | r = kvm_create_lapic(vcpu); | |
6530 | if (r < 0) | |
6531 | goto fail_mmu_destroy; | |
6532 | } | |
6533 | ||
890ca9ae HY |
6534 | vcpu->arch.mce_banks = kzalloc(KVM_MAX_MCE_BANKS * sizeof(u64) * 4, |
6535 | GFP_KERNEL); | |
6536 | if (!vcpu->arch.mce_banks) { | |
6537 | r = -ENOMEM; | |
443c39bc | 6538 | goto fail_free_lapic; |
890ca9ae HY |
6539 | } |
6540 | vcpu->arch.mcg_cap = KVM_MAX_MCE_BANKS; | |
6541 | ||
f5f48ee1 SY |
6542 | if (!zalloc_cpumask_var(&vcpu->arch.wbinvd_dirty_mask, GFP_KERNEL)) |
6543 | goto fail_free_mce_banks; | |
6544 | ||
af585b92 GN |
6545 | kvm_async_pf_hash_reset(vcpu); |
6546 | ||
e9b11c17 | 6547 | return 0; |
f5f48ee1 SY |
6548 | fail_free_mce_banks: |
6549 | kfree(vcpu->arch.mce_banks); | |
443c39bc WY |
6550 | fail_free_lapic: |
6551 | kvm_free_lapic(vcpu); | |
e9b11c17 ZX |
6552 | fail_mmu_destroy: |
6553 | kvm_mmu_destroy(vcpu); | |
6554 | fail_free_pio_data: | |
ad312c7c | 6555 | free_page((unsigned long)vcpu->arch.pio_data); |
e9b11c17 ZX |
6556 | fail: |
6557 | return r; | |
6558 | } | |
6559 | ||
6560 | void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) | |
6561 | { | |
f656ce01 MT |
6562 | int idx; |
6563 | ||
36cb93fd | 6564 | kfree(vcpu->arch.mce_banks); |
e9b11c17 | 6565 | kvm_free_lapic(vcpu); |
f656ce01 | 6566 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
e9b11c17 | 6567 | kvm_mmu_destroy(vcpu); |
f656ce01 | 6568 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
ad312c7c | 6569 | free_page((unsigned long)vcpu->arch.pio_data); |
e9b11c17 | 6570 | } |
d19a9cd2 | 6571 | |
d89f5eff | 6572 | int kvm_arch_init_vm(struct kvm *kvm) |
d19a9cd2 | 6573 | { |
f05e70ac | 6574 | INIT_LIST_HEAD(&kvm->arch.active_mmu_pages); |
4d5c5d0f | 6575 | INIT_LIST_HEAD(&kvm->arch.assigned_dev_head); |
d19a9cd2 | 6576 | |
5550af4d SY |
6577 | /* Reserve bit 0 of irq_sources_bitmap for userspace irq source */ |
6578 | set_bit(KVM_USERSPACE_IRQ_SOURCE_ID, &kvm->arch.irq_sources_bitmap); | |
6579 | ||
038f8c11 | 6580 | raw_spin_lock_init(&kvm->arch.tsc_write_lock); |
53f658b3 | 6581 | |
d89f5eff | 6582 | return 0; |
d19a9cd2 ZX |
6583 | } |
6584 | ||
6585 | static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu) | |
6586 | { | |
6587 | vcpu_load(vcpu); | |
6588 | kvm_mmu_unload(vcpu); | |
6589 | vcpu_put(vcpu); | |
6590 | } | |
6591 | ||
6592 | static void kvm_free_vcpus(struct kvm *kvm) | |
6593 | { | |
6594 | unsigned int i; | |
988a2cae | 6595 | struct kvm_vcpu *vcpu; |
d19a9cd2 ZX |
6596 | |
6597 | /* | |
6598 | * Unpin any mmu pages first. | |
6599 | */ | |
af585b92 GN |
6600 | kvm_for_each_vcpu(i, vcpu, kvm) { |
6601 | kvm_clear_async_pf_completion_queue(vcpu); | |
988a2cae | 6602 | kvm_unload_vcpu_mmu(vcpu); |
af585b92 | 6603 | } |
988a2cae GN |
6604 | kvm_for_each_vcpu(i, vcpu, kvm) |
6605 | kvm_arch_vcpu_free(vcpu); | |
6606 | ||
6607 | mutex_lock(&kvm->lock); | |
6608 | for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) | |
6609 | kvm->vcpus[i] = NULL; | |
d19a9cd2 | 6610 | |
988a2cae GN |
6611 | atomic_set(&kvm->online_vcpus, 0); |
6612 | mutex_unlock(&kvm->lock); | |
d19a9cd2 ZX |
6613 | } |
6614 | ||
ad8ba2cd SY |
6615 | void kvm_arch_sync_events(struct kvm *kvm) |
6616 | { | |
ba4cef31 | 6617 | kvm_free_all_assigned_devices(kvm); |
aea924f6 | 6618 | kvm_free_pit(kvm); |
ad8ba2cd SY |
6619 | } |
6620 | ||
d19a9cd2 ZX |
6621 | void kvm_arch_destroy_vm(struct kvm *kvm) |
6622 | { | |
6eb55818 | 6623 | kvm_iommu_unmap_guest(kvm); |
d7deeeb0 ZX |
6624 | kfree(kvm->arch.vpic); |
6625 | kfree(kvm->arch.vioapic); | |
d19a9cd2 | 6626 | kvm_free_vcpus(kvm); |
3d45830c AK |
6627 | if (kvm->arch.apic_access_page) |
6628 | put_page(kvm->arch.apic_access_page); | |
b7ebfb05 SY |
6629 | if (kvm->arch.ept_identity_pagetable) |
6630 | put_page(kvm->arch.ept_identity_pagetable); | |
d19a9cd2 | 6631 | } |
0de10343 | 6632 | |
f7784b8e MT |
6633 | int kvm_arch_prepare_memory_region(struct kvm *kvm, |
6634 | struct kvm_memory_slot *memslot, | |
0de10343 | 6635 | struct kvm_memory_slot old, |
f7784b8e | 6636 | struct kvm_userspace_memory_region *mem, |
0de10343 ZX |
6637 | int user_alloc) |
6638 | { | |
f7784b8e | 6639 | int npages = memslot->npages; |
7ac77099 AK |
6640 | int map_flags = MAP_PRIVATE | MAP_ANONYMOUS; |
6641 | ||
6642 | /* Prevent internal slot pages from being moved by fork()/COW. */ | |
6643 | if (memslot->id >= KVM_MEMORY_SLOTS) | |
6644 | map_flags = MAP_SHARED | MAP_ANONYMOUS; | |
0de10343 ZX |
6645 | |
6646 | /*To keep backward compatibility with older userspace, | |
6647 | *x86 needs to hanlde !user_alloc case. | |
6648 | */ | |
6649 | if (!user_alloc) { | |
6650 | if (npages && !old.rmap) { | |
604b38ac AA |
6651 | unsigned long userspace_addr; |
6652 | ||
72dc67a6 | 6653 | down_write(¤t->mm->mmap_sem); |
604b38ac AA |
6654 | userspace_addr = do_mmap(NULL, 0, |
6655 | npages * PAGE_SIZE, | |
6656 | PROT_READ | PROT_WRITE, | |
7ac77099 | 6657 | map_flags, |
604b38ac | 6658 | 0); |
72dc67a6 | 6659 | up_write(¤t->mm->mmap_sem); |
0de10343 | 6660 | |
604b38ac AA |
6661 | if (IS_ERR((void *)userspace_addr)) |
6662 | return PTR_ERR((void *)userspace_addr); | |
6663 | ||
604b38ac | 6664 | memslot->userspace_addr = userspace_addr; |
0de10343 ZX |
6665 | } |
6666 | } | |
6667 | ||
f7784b8e MT |
6668 | |
6669 | return 0; | |
6670 | } | |
6671 | ||
6672 | void kvm_arch_commit_memory_region(struct kvm *kvm, | |
6673 | struct kvm_userspace_memory_region *mem, | |
6674 | struct kvm_memory_slot old, | |
6675 | int user_alloc) | |
6676 | { | |
6677 | ||
48c0e4e9 | 6678 | int nr_mmu_pages = 0, npages = mem->memory_size >> PAGE_SHIFT; |
f7784b8e MT |
6679 | |
6680 | if (!user_alloc && !old.user_alloc && old.rmap && !npages) { | |
6681 | int ret; | |
6682 | ||
6683 | down_write(¤t->mm->mmap_sem); | |
6684 | ret = do_munmap(current->mm, old.userspace_addr, | |
6685 | old.npages * PAGE_SIZE); | |
6686 | up_write(¤t->mm->mmap_sem); | |
6687 | if (ret < 0) | |
6688 | printk(KERN_WARNING | |
6689 | "kvm_vm_ioctl_set_memory_region: " | |
6690 | "failed to munmap memory\n"); | |
6691 | } | |
6692 | ||
48c0e4e9 XG |
6693 | if (!kvm->arch.n_requested_mmu_pages) |
6694 | nr_mmu_pages = kvm_mmu_calculate_mmu_pages(kvm); | |
6695 | ||
7c8a83b7 | 6696 | spin_lock(&kvm->mmu_lock); |
48c0e4e9 | 6697 | if (nr_mmu_pages) |
0de10343 | 6698 | kvm_mmu_change_mmu_pages(kvm, nr_mmu_pages); |
0de10343 | 6699 | kvm_mmu_slot_remove_write_access(kvm, mem->slot); |
7c8a83b7 | 6700 | spin_unlock(&kvm->mmu_lock); |
0de10343 | 6701 | } |
1d737c8a | 6702 | |
34d4cb8f MT |
6703 | void kvm_arch_flush_shadow(struct kvm *kvm) |
6704 | { | |
6705 | kvm_mmu_zap_all(kvm); | |
8986ecc0 | 6706 | kvm_reload_remote_mmus(kvm); |
34d4cb8f MT |
6707 | } |
6708 | ||
1d737c8a ZX |
6709 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
6710 | { | |
af585b92 GN |
6711 | return (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE && |
6712 | !vcpu->arch.apf.halted) | |
6713 | || !list_empty_careful(&vcpu->async_pf.done) | |
a1b37100 | 6714 | || vcpu->arch.mp_state == KVM_MP_STATE_SIPI_RECEIVED |
7460fb4a | 6715 | || atomic_read(&vcpu->arch.nmi_queued) || |
a1b37100 GN |
6716 | (kvm_arch_interrupt_allowed(vcpu) && |
6717 | kvm_cpu_has_interrupt(vcpu)); | |
1d737c8a | 6718 | } |
5736199a | 6719 | |
5736199a ZX |
6720 | void kvm_vcpu_kick(struct kvm_vcpu *vcpu) |
6721 | { | |
32f88400 MT |
6722 | int me; |
6723 | int cpu = vcpu->cpu; | |
5736199a ZX |
6724 | |
6725 | if (waitqueue_active(&vcpu->wq)) { | |
6726 | wake_up_interruptible(&vcpu->wq); | |
6727 | ++vcpu->stat.halt_wakeup; | |
6728 | } | |
32f88400 MT |
6729 | |
6730 | me = get_cpu(); | |
6731 | if (cpu != me && (unsigned)cpu < nr_cpu_ids && cpu_online(cpu)) | |
6b7e2d09 | 6732 | if (kvm_vcpu_exiting_guest_mode(vcpu) == IN_GUEST_MODE) |
32f88400 | 6733 | smp_send_reschedule(cpu); |
e9571ed5 | 6734 | put_cpu(); |
5736199a | 6735 | } |
78646121 GN |
6736 | |
6737 | int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu) | |
6738 | { | |
6739 | return kvm_x86_ops->interrupt_allowed(vcpu); | |
6740 | } | |
229456fc | 6741 | |
f92653ee JK |
6742 | bool kvm_is_linear_rip(struct kvm_vcpu *vcpu, unsigned long linear_rip) |
6743 | { | |
6744 | unsigned long current_rip = kvm_rip_read(vcpu) + | |
6745 | get_segment_base(vcpu, VCPU_SREG_CS); | |
6746 | ||
6747 | return current_rip == linear_rip; | |
6748 | } | |
6749 | EXPORT_SYMBOL_GPL(kvm_is_linear_rip); | |
6750 | ||
94fe45da JK |
6751 | unsigned long kvm_get_rflags(struct kvm_vcpu *vcpu) |
6752 | { | |
6753 | unsigned long rflags; | |
6754 | ||
6755 | rflags = kvm_x86_ops->get_rflags(vcpu); | |
6756 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) | |
c310bac5 | 6757 | rflags &= ~X86_EFLAGS_TF; |
94fe45da JK |
6758 | return rflags; |
6759 | } | |
6760 | EXPORT_SYMBOL_GPL(kvm_get_rflags); | |
6761 | ||
6762 | void kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags) | |
6763 | { | |
6764 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP && | |
f92653ee | 6765 | kvm_is_linear_rip(vcpu, vcpu->arch.singlestep_rip)) |
c310bac5 | 6766 | rflags |= X86_EFLAGS_TF; |
94fe45da | 6767 | kvm_x86_ops->set_rflags(vcpu, rflags); |
3842d135 | 6768 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
94fe45da JK |
6769 | } |
6770 | EXPORT_SYMBOL_GPL(kvm_set_rflags); | |
6771 | ||
56028d08 GN |
6772 | void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu, struct kvm_async_pf *work) |
6773 | { | |
6774 | int r; | |
6775 | ||
fb67e14f | 6776 | if ((vcpu->arch.mmu.direct_map != work->arch.direct_map) || |
c4806acd | 6777 | is_error_page(work->page)) |
56028d08 GN |
6778 | return; |
6779 | ||
6780 | r = kvm_mmu_reload(vcpu); | |
6781 | if (unlikely(r)) | |
6782 | return; | |
6783 | ||
fb67e14f XG |
6784 | if (!vcpu->arch.mmu.direct_map && |
6785 | work->arch.cr3 != vcpu->arch.mmu.get_cr3(vcpu)) | |
6786 | return; | |
6787 | ||
56028d08 GN |
6788 | vcpu->arch.mmu.page_fault(vcpu, work->gva, 0, true); |
6789 | } | |
6790 | ||
af585b92 GN |
6791 | static inline u32 kvm_async_pf_hash_fn(gfn_t gfn) |
6792 | { | |
6793 | return hash_32(gfn & 0xffffffff, order_base_2(ASYNC_PF_PER_VCPU)); | |
6794 | } | |
6795 | ||
6796 | static inline u32 kvm_async_pf_next_probe(u32 key) | |
6797 | { | |
6798 | return (key + 1) & (roundup_pow_of_two(ASYNC_PF_PER_VCPU) - 1); | |
6799 | } | |
6800 | ||
6801 | static void kvm_add_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn) | |
6802 | { | |
6803 | u32 key = kvm_async_pf_hash_fn(gfn); | |
6804 | ||
6805 | while (vcpu->arch.apf.gfns[key] != ~0) | |
6806 | key = kvm_async_pf_next_probe(key); | |
6807 | ||
6808 | vcpu->arch.apf.gfns[key] = gfn; | |
6809 | } | |
6810 | ||
6811 | static u32 kvm_async_pf_gfn_slot(struct kvm_vcpu *vcpu, gfn_t gfn) | |
6812 | { | |
6813 | int i; | |
6814 | u32 key = kvm_async_pf_hash_fn(gfn); | |
6815 | ||
6816 | for (i = 0; i < roundup_pow_of_two(ASYNC_PF_PER_VCPU) && | |
c7d28c24 XG |
6817 | (vcpu->arch.apf.gfns[key] != gfn && |
6818 | vcpu->arch.apf.gfns[key] != ~0); i++) | |
af585b92 GN |
6819 | key = kvm_async_pf_next_probe(key); |
6820 | ||
6821 | return key; | |
6822 | } | |
6823 | ||
6824 | bool kvm_find_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn) | |
6825 | { | |
6826 | return vcpu->arch.apf.gfns[kvm_async_pf_gfn_slot(vcpu, gfn)] == gfn; | |
6827 | } | |
6828 | ||
6829 | static void kvm_del_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn) | |
6830 | { | |
6831 | u32 i, j, k; | |
6832 | ||
6833 | i = j = kvm_async_pf_gfn_slot(vcpu, gfn); | |
6834 | while (true) { | |
6835 | vcpu->arch.apf.gfns[i] = ~0; | |
6836 | do { | |
6837 | j = kvm_async_pf_next_probe(j); | |
6838 | if (vcpu->arch.apf.gfns[j] == ~0) | |
6839 | return; | |
6840 | k = kvm_async_pf_hash_fn(vcpu->arch.apf.gfns[j]); | |
6841 | /* | |
6842 | * k lies cyclically in ]i,j] | |
6843 | * | i.k.j | | |
6844 | * |....j i.k.| or |.k..j i...| | |
6845 | */ | |
6846 | } while ((i <= j) ? (i < k && k <= j) : (i < k || k <= j)); | |
6847 | vcpu->arch.apf.gfns[i] = vcpu->arch.apf.gfns[j]; | |
6848 | i = j; | |
6849 | } | |
6850 | } | |
6851 | ||
7c90705b GN |
6852 | static int apf_put_user(struct kvm_vcpu *vcpu, u32 val) |
6853 | { | |
6854 | ||
6855 | return kvm_write_guest_cached(vcpu->kvm, &vcpu->arch.apf.data, &val, | |
6856 | sizeof(val)); | |
6857 | } | |
6858 | ||
af585b92 GN |
6859 | void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu, |
6860 | struct kvm_async_pf *work) | |
6861 | { | |
6389ee94 AK |
6862 | struct x86_exception fault; |
6863 | ||
7c90705b | 6864 | trace_kvm_async_pf_not_present(work->arch.token, work->gva); |
af585b92 | 6865 | kvm_add_async_pf_gfn(vcpu, work->arch.gfn); |
7c90705b GN |
6866 | |
6867 | if (!(vcpu->arch.apf.msr_val & KVM_ASYNC_PF_ENABLED) || | |
fc5f06fa GN |
6868 | (vcpu->arch.apf.send_user_only && |
6869 | kvm_x86_ops->get_cpl(vcpu) == 0)) | |
7c90705b GN |
6870 | kvm_make_request(KVM_REQ_APF_HALT, vcpu); |
6871 | else if (!apf_put_user(vcpu, KVM_PV_REASON_PAGE_NOT_PRESENT)) { | |
6389ee94 AK |
6872 | fault.vector = PF_VECTOR; |
6873 | fault.error_code_valid = true; | |
6874 | fault.error_code = 0; | |
6875 | fault.nested_page_fault = false; | |
6876 | fault.address = work->arch.token; | |
6877 | kvm_inject_page_fault(vcpu, &fault); | |
7c90705b | 6878 | } |
af585b92 GN |
6879 | } |
6880 | ||
6881 | void kvm_arch_async_page_present(struct kvm_vcpu *vcpu, | |
6882 | struct kvm_async_pf *work) | |
6883 | { | |
6389ee94 AK |
6884 | struct x86_exception fault; |
6885 | ||
7c90705b GN |
6886 | trace_kvm_async_pf_ready(work->arch.token, work->gva); |
6887 | if (is_error_page(work->page)) | |
6888 | work->arch.token = ~0; /* broadcast wakeup */ | |
6889 | else | |
6890 | kvm_del_async_pf_gfn(vcpu, work->arch.gfn); | |
6891 | ||
6892 | if ((vcpu->arch.apf.msr_val & KVM_ASYNC_PF_ENABLED) && | |
6893 | !apf_put_user(vcpu, KVM_PV_REASON_PAGE_READY)) { | |
6389ee94 AK |
6894 | fault.vector = PF_VECTOR; |
6895 | fault.error_code_valid = true; | |
6896 | fault.error_code = 0; | |
6897 | fault.nested_page_fault = false; | |
6898 | fault.address = work->arch.token; | |
6899 | kvm_inject_page_fault(vcpu, &fault); | |
7c90705b | 6900 | } |
e6d53e3b | 6901 | vcpu->arch.apf.halted = false; |
7c90705b GN |
6902 | } |
6903 | ||
6904 | bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu) | |
6905 | { | |
6906 | if (!(vcpu->arch.apf.msr_val & KVM_ASYNC_PF_ENABLED)) | |
6907 | return true; | |
6908 | else | |
6909 | return !kvm_event_needs_reinjection(vcpu) && | |
6910 | kvm_x86_ops->interrupt_allowed(vcpu); | |
af585b92 GN |
6911 | } |
6912 | ||
229456fc MT |
6913 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_exit); |
6914 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_inj_virq); | |
6915 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_page_fault); | |
6916 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_msr); | |
6917 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_cr); | |
0ac406de | 6918 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmrun); |
d8cabddf | 6919 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit); |
17897f36 | 6920 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit_inject); |
236649de | 6921 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intr_vmexit); |
ec1ff790 | 6922 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_invlpga); |
532a46b9 | 6923 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_skinit); |
2e554e8d | 6924 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intercepts); |