Commit | Line | Data |
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043405e1 CO |
1 | /* |
2 | * Kernel-based Virtual Machine driver for Linux | |
3 | * | |
4 | * derived from drivers/kvm/kvm_main.c | |
5 | * | |
6 | * Copyright (C) 2006 Qumranet, Inc. | |
4d5c5d0f BAY |
7 | * Copyright (C) 2008 Qumranet, Inc. |
8 | * Copyright IBM Corporation, 2008 | |
9611c187 | 9 | * Copyright 2010 Red Hat, Inc. and/or its affiliates. |
043405e1 CO |
10 | * |
11 | * Authors: | |
12 | * Avi Kivity <avi@qumranet.com> | |
13 | * Yaniv Kamay <yaniv@qumranet.com> | |
4d5c5d0f BAY |
14 | * Amit Shah <amit.shah@qumranet.com> |
15 | * Ben-Ami Yassour <benami@il.ibm.com> | |
043405e1 CO |
16 | * |
17 | * This work is licensed under the terms of the GNU GPL, version 2. See | |
18 | * the COPYING file in the top-level directory. | |
19 | * | |
20 | */ | |
21 | ||
edf88417 | 22 | #include <linux/kvm_host.h> |
313a3dc7 | 23 | #include "irq.h" |
1d737c8a | 24 | #include "mmu.h" |
7837699f | 25 | #include "i8254.h" |
37817f29 | 26 | #include "tss.h" |
5fdbf976 | 27 | #include "kvm_cache_regs.h" |
26eef70c | 28 | #include "x86.h" |
313a3dc7 | 29 | |
18068523 | 30 | #include <linux/clocksource.h> |
4d5c5d0f | 31 | #include <linux/interrupt.h> |
313a3dc7 CO |
32 | #include <linux/kvm.h> |
33 | #include <linux/fs.h> | |
34 | #include <linux/vmalloc.h> | |
5fb76f9b | 35 | #include <linux/module.h> |
0de10343 | 36 | #include <linux/mman.h> |
2bacc55c | 37 | #include <linux/highmem.h> |
19de40a8 | 38 | #include <linux/iommu.h> |
62c476c7 | 39 | #include <linux/intel-iommu.h> |
c8076604 | 40 | #include <linux/cpufreq.h> |
18863bdd | 41 | #include <linux/user-return-notifier.h> |
a983fb23 | 42 | #include <linux/srcu.h> |
5a0e3ad6 | 43 | #include <linux/slab.h> |
ff9d07a0 | 44 | #include <linux/perf_event.h> |
7bee342a | 45 | #include <linux/uaccess.h> |
af585b92 | 46 | #include <linux/hash.h> |
aec51dc4 | 47 | #include <trace/events/kvm.h> |
2ed152af | 48 | |
229456fc MT |
49 | #define CREATE_TRACE_POINTS |
50 | #include "trace.h" | |
043405e1 | 51 | |
24f1e32c | 52 | #include <asm/debugreg.h> |
d825ed0a | 53 | #include <asm/msr.h> |
a5f61300 | 54 | #include <asm/desc.h> |
0bed3b56 | 55 | #include <asm/mtrr.h> |
890ca9ae | 56 | #include <asm/mce.h> |
7cf30855 | 57 | #include <asm/i387.h> |
98918833 | 58 | #include <asm/xcr.h> |
1d5f066e | 59 | #include <asm/pvclock.h> |
217fc9cf | 60 | #include <asm/div64.h> |
043405e1 | 61 | |
313a3dc7 | 62 | #define MAX_IO_MSRS 256 |
890ca9ae | 63 | #define KVM_MAX_MCE_BANKS 32 |
5854dbca | 64 | #define KVM_MCE_CAP_SUPPORTED (MCG_CTL_P | MCG_SER_P) |
890ca9ae | 65 | |
50a37eb4 JR |
66 | /* EFER defaults: |
67 | * - enable syscall per default because its emulated by KVM | |
68 | * - enable LME and LMA per default on 64 bit KVM | |
69 | */ | |
70 | #ifdef CONFIG_X86_64 | |
1260edbe LJ |
71 | static |
72 | u64 __read_mostly efer_reserved_bits = ~((u64)(EFER_SCE | EFER_LME | EFER_LMA)); | |
50a37eb4 | 73 | #else |
1260edbe | 74 | static u64 __read_mostly efer_reserved_bits = ~((u64)EFER_SCE); |
50a37eb4 | 75 | #endif |
313a3dc7 | 76 | |
ba1389b7 AK |
77 | #define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM |
78 | #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU | |
417bc304 | 79 | |
cb142eb7 | 80 | static void update_cr8_intercept(struct kvm_vcpu *vcpu); |
674eea0f AK |
81 | static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2 *cpuid, |
82 | struct kvm_cpuid_entry2 __user *entries); | |
83 | ||
97896d04 | 84 | struct kvm_x86_ops *kvm_x86_ops; |
5fdbf976 | 85 | EXPORT_SYMBOL_GPL(kvm_x86_ops); |
97896d04 | 86 | |
ed85c068 AP |
87 | int ignore_msrs = 0; |
88 | module_param_named(ignore_msrs, ignore_msrs, bool, S_IRUGO | S_IWUSR); | |
89 | ||
18863bdd AK |
90 | #define KVM_NR_SHARED_MSRS 16 |
91 | ||
92 | struct kvm_shared_msrs_global { | |
93 | int nr; | |
2bf78fa7 | 94 | u32 msrs[KVM_NR_SHARED_MSRS]; |
18863bdd AK |
95 | }; |
96 | ||
97 | struct kvm_shared_msrs { | |
98 | struct user_return_notifier urn; | |
99 | bool registered; | |
2bf78fa7 SY |
100 | struct kvm_shared_msr_values { |
101 | u64 host; | |
102 | u64 curr; | |
103 | } values[KVM_NR_SHARED_MSRS]; | |
18863bdd AK |
104 | }; |
105 | ||
106 | static struct kvm_shared_msrs_global __read_mostly shared_msrs_global; | |
107 | static DEFINE_PER_CPU(struct kvm_shared_msrs, shared_msrs); | |
108 | ||
417bc304 | 109 | struct kvm_stats_debugfs_item debugfs_entries[] = { |
ba1389b7 AK |
110 | { "pf_fixed", VCPU_STAT(pf_fixed) }, |
111 | { "pf_guest", VCPU_STAT(pf_guest) }, | |
112 | { "tlb_flush", VCPU_STAT(tlb_flush) }, | |
113 | { "invlpg", VCPU_STAT(invlpg) }, | |
114 | { "exits", VCPU_STAT(exits) }, | |
115 | { "io_exits", VCPU_STAT(io_exits) }, | |
116 | { "mmio_exits", VCPU_STAT(mmio_exits) }, | |
117 | { "signal_exits", VCPU_STAT(signal_exits) }, | |
118 | { "irq_window", VCPU_STAT(irq_window_exits) }, | |
f08864b4 | 119 | { "nmi_window", VCPU_STAT(nmi_window_exits) }, |
ba1389b7 AK |
120 | { "halt_exits", VCPU_STAT(halt_exits) }, |
121 | { "halt_wakeup", VCPU_STAT(halt_wakeup) }, | |
f11c3a8d | 122 | { "hypercalls", VCPU_STAT(hypercalls) }, |
ba1389b7 AK |
123 | { "request_irq", VCPU_STAT(request_irq_exits) }, |
124 | { "irq_exits", VCPU_STAT(irq_exits) }, | |
125 | { "host_state_reload", VCPU_STAT(host_state_reload) }, | |
126 | { "efer_reload", VCPU_STAT(efer_reload) }, | |
127 | { "fpu_reload", VCPU_STAT(fpu_reload) }, | |
128 | { "insn_emulation", VCPU_STAT(insn_emulation) }, | |
129 | { "insn_emulation_fail", VCPU_STAT(insn_emulation_fail) }, | |
fa89a817 | 130 | { "irq_injections", VCPU_STAT(irq_injections) }, |
c4abb7c9 | 131 | { "nmi_injections", VCPU_STAT(nmi_injections) }, |
4cee5764 AK |
132 | { "mmu_shadow_zapped", VM_STAT(mmu_shadow_zapped) }, |
133 | { "mmu_pte_write", VM_STAT(mmu_pte_write) }, | |
134 | { "mmu_pte_updated", VM_STAT(mmu_pte_updated) }, | |
135 | { "mmu_pde_zapped", VM_STAT(mmu_pde_zapped) }, | |
136 | { "mmu_flooded", VM_STAT(mmu_flooded) }, | |
137 | { "mmu_recycled", VM_STAT(mmu_recycled) }, | |
dfc5aa00 | 138 | { "mmu_cache_miss", VM_STAT(mmu_cache_miss) }, |
4731d4c7 | 139 | { "mmu_unsync", VM_STAT(mmu_unsync) }, |
0f74a24c | 140 | { "remote_tlb_flush", VM_STAT(remote_tlb_flush) }, |
05da4558 | 141 | { "largepages", VM_STAT(lpages) }, |
417bc304 HB |
142 | { NULL } |
143 | }; | |
144 | ||
2acf923e DC |
145 | u64 __read_mostly host_xcr0; |
146 | ||
af585b92 GN |
147 | static inline void kvm_async_pf_hash_reset(struct kvm_vcpu *vcpu) |
148 | { | |
149 | int i; | |
150 | for (i = 0; i < roundup_pow_of_two(ASYNC_PF_PER_VCPU); i++) | |
151 | vcpu->arch.apf.gfns[i] = ~0; | |
152 | } | |
153 | ||
18863bdd AK |
154 | static void kvm_on_user_return(struct user_return_notifier *urn) |
155 | { | |
156 | unsigned slot; | |
18863bdd AK |
157 | struct kvm_shared_msrs *locals |
158 | = container_of(urn, struct kvm_shared_msrs, urn); | |
2bf78fa7 | 159 | struct kvm_shared_msr_values *values; |
18863bdd AK |
160 | |
161 | for (slot = 0; slot < shared_msrs_global.nr; ++slot) { | |
2bf78fa7 SY |
162 | values = &locals->values[slot]; |
163 | if (values->host != values->curr) { | |
164 | wrmsrl(shared_msrs_global.msrs[slot], values->host); | |
165 | values->curr = values->host; | |
18863bdd AK |
166 | } |
167 | } | |
168 | locals->registered = false; | |
169 | user_return_notifier_unregister(urn); | |
170 | } | |
171 | ||
2bf78fa7 | 172 | static void shared_msr_update(unsigned slot, u32 msr) |
18863bdd | 173 | { |
2bf78fa7 | 174 | struct kvm_shared_msrs *smsr; |
18863bdd AK |
175 | u64 value; |
176 | ||
2bf78fa7 SY |
177 | smsr = &__get_cpu_var(shared_msrs); |
178 | /* only read, and nobody should modify it at this time, | |
179 | * so don't need lock */ | |
180 | if (slot >= shared_msrs_global.nr) { | |
181 | printk(KERN_ERR "kvm: invalid MSR slot!"); | |
182 | return; | |
183 | } | |
184 | rdmsrl_safe(msr, &value); | |
185 | smsr->values[slot].host = value; | |
186 | smsr->values[slot].curr = value; | |
187 | } | |
188 | ||
189 | void kvm_define_shared_msr(unsigned slot, u32 msr) | |
190 | { | |
18863bdd AK |
191 | if (slot >= shared_msrs_global.nr) |
192 | shared_msrs_global.nr = slot + 1; | |
2bf78fa7 SY |
193 | shared_msrs_global.msrs[slot] = msr; |
194 | /* we need ensured the shared_msr_global have been updated */ | |
195 | smp_wmb(); | |
18863bdd AK |
196 | } |
197 | EXPORT_SYMBOL_GPL(kvm_define_shared_msr); | |
198 | ||
199 | static void kvm_shared_msr_cpu_online(void) | |
200 | { | |
201 | unsigned i; | |
18863bdd AK |
202 | |
203 | for (i = 0; i < shared_msrs_global.nr; ++i) | |
2bf78fa7 | 204 | shared_msr_update(i, shared_msrs_global.msrs[i]); |
18863bdd AK |
205 | } |
206 | ||
d5696725 | 207 | void kvm_set_shared_msr(unsigned slot, u64 value, u64 mask) |
18863bdd AK |
208 | { |
209 | struct kvm_shared_msrs *smsr = &__get_cpu_var(shared_msrs); | |
210 | ||
2bf78fa7 | 211 | if (((value ^ smsr->values[slot].curr) & mask) == 0) |
18863bdd | 212 | return; |
2bf78fa7 SY |
213 | smsr->values[slot].curr = value; |
214 | wrmsrl(shared_msrs_global.msrs[slot], value); | |
18863bdd AK |
215 | if (!smsr->registered) { |
216 | smsr->urn.on_user_return = kvm_on_user_return; | |
217 | user_return_notifier_register(&smsr->urn); | |
218 | smsr->registered = true; | |
219 | } | |
220 | } | |
221 | EXPORT_SYMBOL_GPL(kvm_set_shared_msr); | |
222 | ||
3548bab5 AK |
223 | static void drop_user_return_notifiers(void *ignore) |
224 | { | |
225 | struct kvm_shared_msrs *smsr = &__get_cpu_var(shared_msrs); | |
226 | ||
227 | if (smsr->registered) | |
228 | kvm_on_user_return(&smsr->urn); | |
229 | } | |
230 | ||
6866b83e CO |
231 | u64 kvm_get_apic_base(struct kvm_vcpu *vcpu) |
232 | { | |
233 | if (irqchip_in_kernel(vcpu->kvm)) | |
ad312c7c | 234 | return vcpu->arch.apic_base; |
6866b83e | 235 | else |
ad312c7c | 236 | return vcpu->arch.apic_base; |
6866b83e CO |
237 | } |
238 | EXPORT_SYMBOL_GPL(kvm_get_apic_base); | |
239 | ||
240 | void kvm_set_apic_base(struct kvm_vcpu *vcpu, u64 data) | |
241 | { | |
242 | /* TODO: reserve bits check */ | |
243 | if (irqchip_in_kernel(vcpu->kvm)) | |
244 | kvm_lapic_set_base(vcpu, data); | |
245 | else | |
ad312c7c | 246 | vcpu->arch.apic_base = data; |
6866b83e CO |
247 | } |
248 | EXPORT_SYMBOL_GPL(kvm_set_apic_base); | |
249 | ||
3fd28fce ED |
250 | #define EXCPT_BENIGN 0 |
251 | #define EXCPT_CONTRIBUTORY 1 | |
252 | #define EXCPT_PF 2 | |
253 | ||
254 | static int exception_class(int vector) | |
255 | { | |
256 | switch (vector) { | |
257 | case PF_VECTOR: | |
258 | return EXCPT_PF; | |
259 | case DE_VECTOR: | |
260 | case TS_VECTOR: | |
261 | case NP_VECTOR: | |
262 | case SS_VECTOR: | |
263 | case GP_VECTOR: | |
264 | return EXCPT_CONTRIBUTORY; | |
265 | default: | |
266 | break; | |
267 | } | |
268 | return EXCPT_BENIGN; | |
269 | } | |
270 | ||
271 | static void kvm_multiple_exception(struct kvm_vcpu *vcpu, | |
ce7ddec4 JR |
272 | unsigned nr, bool has_error, u32 error_code, |
273 | bool reinject) | |
3fd28fce ED |
274 | { |
275 | u32 prev_nr; | |
276 | int class1, class2; | |
277 | ||
3842d135 AK |
278 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
279 | ||
3fd28fce ED |
280 | if (!vcpu->arch.exception.pending) { |
281 | queue: | |
282 | vcpu->arch.exception.pending = true; | |
283 | vcpu->arch.exception.has_error_code = has_error; | |
284 | vcpu->arch.exception.nr = nr; | |
285 | vcpu->arch.exception.error_code = error_code; | |
3f0fd292 | 286 | vcpu->arch.exception.reinject = reinject; |
3fd28fce ED |
287 | return; |
288 | } | |
289 | ||
290 | /* to check exception */ | |
291 | prev_nr = vcpu->arch.exception.nr; | |
292 | if (prev_nr == DF_VECTOR) { | |
293 | /* triple fault -> shutdown */ | |
a8eeb04a | 294 | kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu); |
3fd28fce ED |
295 | return; |
296 | } | |
297 | class1 = exception_class(prev_nr); | |
298 | class2 = exception_class(nr); | |
299 | if ((class1 == EXCPT_CONTRIBUTORY && class2 == EXCPT_CONTRIBUTORY) | |
300 | || (class1 == EXCPT_PF && class2 != EXCPT_BENIGN)) { | |
301 | /* generate double fault per SDM Table 5-5 */ | |
302 | vcpu->arch.exception.pending = true; | |
303 | vcpu->arch.exception.has_error_code = true; | |
304 | vcpu->arch.exception.nr = DF_VECTOR; | |
305 | vcpu->arch.exception.error_code = 0; | |
306 | } else | |
307 | /* replace previous exception with a new one in a hope | |
308 | that instruction re-execution will regenerate lost | |
309 | exception */ | |
310 | goto queue; | |
311 | } | |
312 | ||
298101da AK |
313 | void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr) |
314 | { | |
ce7ddec4 | 315 | kvm_multiple_exception(vcpu, nr, false, 0, false); |
298101da AK |
316 | } |
317 | EXPORT_SYMBOL_GPL(kvm_queue_exception); | |
318 | ||
ce7ddec4 JR |
319 | void kvm_requeue_exception(struct kvm_vcpu *vcpu, unsigned nr) |
320 | { | |
321 | kvm_multiple_exception(vcpu, nr, false, 0, true); | |
322 | } | |
323 | EXPORT_SYMBOL_GPL(kvm_requeue_exception); | |
324 | ||
db8fcefa | 325 | void kvm_complete_insn_gp(struct kvm_vcpu *vcpu, int err) |
c3c91fee | 326 | { |
db8fcefa AP |
327 | if (err) |
328 | kvm_inject_gp(vcpu, 0); | |
329 | else | |
330 | kvm_x86_ops->skip_emulated_instruction(vcpu); | |
331 | } | |
332 | EXPORT_SYMBOL_GPL(kvm_complete_insn_gp); | |
8df25a32 | 333 | |
6389ee94 | 334 | void kvm_inject_page_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault) |
c3c91fee AK |
335 | { |
336 | ++vcpu->stat.pf_guest; | |
6389ee94 AK |
337 | vcpu->arch.cr2 = fault->address; |
338 | kvm_queue_exception_e(vcpu, PF_VECTOR, fault->error_code); | |
c3c91fee AK |
339 | } |
340 | ||
6389ee94 | 341 | void kvm_propagate_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault) |
d4f8cf66 | 342 | { |
6389ee94 AK |
343 | if (mmu_is_nested(vcpu) && !fault->nested_page_fault) |
344 | vcpu->arch.nested_mmu.inject_page_fault(vcpu, fault); | |
d4f8cf66 | 345 | else |
6389ee94 | 346 | vcpu->arch.mmu.inject_page_fault(vcpu, fault); |
d4f8cf66 JR |
347 | } |
348 | ||
3419ffc8 SY |
349 | void kvm_inject_nmi(struct kvm_vcpu *vcpu) |
350 | { | |
3842d135 | 351 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
c761e586 | 352 | vcpu->arch.nmi_pending = 1; |
3419ffc8 SY |
353 | } |
354 | EXPORT_SYMBOL_GPL(kvm_inject_nmi); | |
355 | ||
298101da AK |
356 | void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code) |
357 | { | |
ce7ddec4 | 358 | kvm_multiple_exception(vcpu, nr, true, error_code, false); |
298101da AK |
359 | } |
360 | EXPORT_SYMBOL_GPL(kvm_queue_exception_e); | |
361 | ||
ce7ddec4 JR |
362 | void kvm_requeue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code) |
363 | { | |
364 | kvm_multiple_exception(vcpu, nr, true, error_code, true); | |
365 | } | |
366 | EXPORT_SYMBOL_GPL(kvm_requeue_exception_e); | |
367 | ||
0a79b009 AK |
368 | /* |
369 | * Checks if cpl <= required_cpl; if true, return true. Otherwise queue | |
370 | * a #GP and return false. | |
371 | */ | |
372 | bool kvm_require_cpl(struct kvm_vcpu *vcpu, int required_cpl) | |
298101da | 373 | { |
0a79b009 AK |
374 | if (kvm_x86_ops->get_cpl(vcpu) <= required_cpl) |
375 | return true; | |
376 | kvm_queue_exception_e(vcpu, GP_VECTOR, 0); | |
377 | return false; | |
298101da | 378 | } |
0a79b009 | 379 | EXPORT_SYMBOL_GPL(kvm_require_cpl); |
298101da | 380 | |
ec92fe44 JR |
381 | /* |
382 | * This function will be used to read from the physical memory of the currently | |
383 | * running guest. The difference to kvm_read_guest_page is that this function | |
384 | * can read from guest physical or from the guest's guest physical memory. | |
385 | */ | |
386 | int kvm_read_guest_page_mmu(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, | |
387 | gfn_t ngfn, void *data, int offset, int len, | |
388 | u32 access) | |
389 | { | |
390 | gfn_t real_gfn; | |
391 | gpa_t ngpa; | |
392 | ||
393 | ngpa = gfn_to_gpa(ngfn); | |
394 | real_gfn = mmu->translate_gpa(vcpu, ngpa, access); | |
395 | if (real_gfn == UNMAPPED_GVA) | |
396 | return -EFAULT; | |
397 | ||
398 | real_gfn = gpa_to_gfn(real_gfn); | |
399 | ||
400 | return kvm_read_guest_page(vcpu->kvm, real_gfn, data, offset, len); | |
401 | } | |
402 | EXPORT_SYMBOL_GPL(kvm_read_guest_page_mmu); | |
403 | ||
3d06b8bf JR |
404 | int kvm_read_nested_guest_page(struct kvm_vcpu *vcpu, gfn_t gfn, |
405 | void *data, int offset, int len, u32 access) | |
406 | { | |
407 | return kvm_read_guest_page_mmu(vcpu, vcpu->arch.walk_mmu, gfn, | |
408 | data, offset, len, access); | |
409 | } | |
410 | ||
a03490ed CO |
411 | /* |
412 | * Load the pae pdptrs. Return true is they are all valid. | |
413 | */ | |
ff03a073 | 414 | int load_pdptrs(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, unsigned long cr3) |
a03490ed CO |
415 | { |
416 | gfn_t pdpt_gfn = cr3 >> PAGE_SHIFT; | |
417 | unsigned offset = ((cr3 & (PAGE_SIZE-1)) >> 5) << 2; | |
418 | int i; | |
419 | int ret; | |
ff03a073 | 420 | u64 pdpte[ARRAY_SIZE(mmu->pdptrs)]; |
a03490ed | 421 | |
ff03a073 JR |
422 | ret = kvm_read_guest_page_mmu(vcpu, mmu, pdpt_gfn, pdpte, |
423 | offset * sizeof(u64), sizeof(pdpte), | |
424 | PFERR_USER_MASK|PFERR_WRITE_MASK); | |
a03490ed CO |
425 | if (ret < 0) { |
426 | ret = 0; | |
427 | goto out; | |
428 | } | |
429 | for (i = 0; i < ARRAY_SIZE(pdpte); ++i) { | |
43a3795a | 430 | if (is_present_gpte(pdpte[i]) && |
20c466b5 | 431 | (pdpte[i] & vcpu->arch.mmu.rsvd_bits_mask[0][2])) { |
a03490ed CO |
432 | ret = 0; |
433 | goto out; | |
434 | } | |
435 | } | |
436 | ret = 1; | |
437 | ||
ff03a073 | 438 | memcpy(mmu->pdptrs, pdpte, sizeof(mmu->pdptrs)); |
6de4f3ad AK |
439 | __set_bit(VCPU_EXREG_PDPTR, |
440 | (unsigned long *)&vcpu->arch.regs_avail); | |
441 | __set_bit(VCPU_EXREG_PDPTR, | |
442 | (unsigned long *)&vcpu->arch.regs_dirty); | |
a03490ed | 443 | out: |
a03490ed CO |
444 | |
445 | return ret; | |
446 | } | |
cc4b6871 | 447 | EXPORT_SYMBOL_GPL(load_pdptrs); |
a03490ed | 448 | |
d835dfec AK |
449 | static bool pdptrs_changed(struct kvm_vcpu *vcpu) |
450 | { | |
ff03a073 | 451 | u64 pdpte[ARRAY_SIZE(vcpu->arch.walk_mmu->pdptrs)]; |
d835dfec | 452 | bool changed = true; |
3d06b8bf JR |
453 | int offset; |
454 | gfn_t gfn; | |
d835dfec AK |
455 | int r; |
456 | ||
457 | if (is_long_mode(vcpu) || !is_pae(vcpu)) | |
458 | return false; | |
459 | ||
6de4f3ad AK |
460 | if (!test_bit(VCPU_EXREG_PDPTR, |
461 | (unsigned long *)&vcpu->arch.regs_avail)) | |
462 | return true; | |
463 | ||
9f8fe504 AK |
464 | gfn = (kvm_read_cr3(vcpu) & ~31u) >> PAGE_SHIFT; |
465 | offset = (kvm_read_cr3(vcpu) & ~31u) & (PAGE_SIZE - 1); | |
3d06b8bf JR |
466 | r = kvm_read_nested_guest_page(vcpu, gfn, pdpte, offset, sizeof(pdpte), |
467 | PFERR_USER_MASK | PFERR_WRITE_MASK); | |
d835dfec AK |
468 | if (r < 0) |
469 | goto out; | |
ff03a073 | 470 | changed = memcmp(pdpte, vcpu->arch.walk_mmu->pdptrs, sizeof(pdpte)) != 0; |
d835dfec | 471 | out: |
d835dfec AK |
472 | |
473 | return changed; | |
474 | } | |
475 | ||
49a9b07e | 476 | int kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) |
a03490ed | 477 | { |
aad82703 SY |
478 | unsigned long old_cr0 = kvm_read_cr0(vcpu); |
479 | unsigned long update_bits = X86_CR0_PG | X86_CR0_WP | | |
480 | X86_CR0_CD | X86_CR0_NW; | |
481 | ||
f9a48e6a AK |
482 | cr0 |= X86_CR0_ET; |
483 | ||
ab344828 | 484 | #ifdef CONFIG_X86_64 |
0f12244f GN |
485 | if (cr0 & 0xffffffff00000000UL) |
486 | return 1; | |
ab344828 GN |
487 | #endif |
488 | ||
489 | cr0 &= ~CR0_RESERVED_BITS; | |
a03490ed | 490 | |
0f12244f GN |
491 | if ((cr0 & X86_CR0_NW) && !(cr0 & X86_CR0_CD)) |
492 | return 1; | |
a03490ed | 493 | |
0f12244f GN |
494 | if ((cr0 & X86_CR0_PG) && !(cr0 & X86_CR0_PE)) |
495 | return 1; | |
a03490ed CO |
496 | |
497 | if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) { | |
498 | #ifdef CONFIG_X86_64 | |
f6801dff | 499 | if ((vcpu->arch.efer & EFER_LME)) { |
a03490ed CO |
500 | int cs_db, cs_l; |
501 | ||
0f12244f GN |
502 | if (!is_pae(vcpu)) |
503 | return 1; | |
a03490ed | 504 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); |
0f12244f GN |
505 | if (cs_l) |
506 | return 1; | |
a03490ed CO |
507 | } else |
508 | #endif | |
ff03a073 | 509 | if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->arch.walk_mmu, |
9f8fe504 | 510 | kvm_read_cr3(vcpu))) |
0f12244f | 511 | return 1; |
a03490ed CO |
512 | } |
513 | ||
514 | kvm_x86_ops->set_cr0(vcpu, cr0); | |
a03490ed | 515 | |
d170c419 | 516 | if ((cr0 ^ old_cr0) & X86_CR0_PG) { |
e5f3f027 | 517 | kvm_clear_async_pf_completion_queue(vcpu); |
d170c419 LJ |
518 | kvm_async_pf_hash_reset(vcpu); |
519 | } | |
e5f3f027 | 520 | |
aad82703 SY |
521 | if ((cr0 ^ old_cr0) & update_bits) |
522 | kvm_mmu_reset_context(vcpu); | |
0f12244f GN |
523 | return 0; |
524 | } | |
2d3ad1f4 | 525 | EXPORT_SYMBOL_GPL(kvm_set_cr0); |
a03490ed | 526 | |
2d3ad1f4 | 527 | void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw) |
a03490ed | 528 | { |
49a9b07e | 529 | (void)kvm_set_cr0(vcpu, kvm_read_cr0_bits(vcpu, ~0x0eul) | (msw & 0x0f)); |
a03490ed | 530 | } |
2d3ad1f4 | 531 | EXPORT_SYMBOL_GPL(kvm_lmsw); |
a03490ed | 532 | |
2acf923e DC |
533 | int __kvm_set_xcr(struct kvm_vcpu *vcpu, u32 index, u64 xcr) |
534 | { | |
535 | u64 xcr0; | |
536 | ||
537 | /* Only support XCR_XFEATURE_ENABLED_MASK(xcr0) now */ | |
538 | if (index != XCR_XFEATURE_ENABLED_MASK) | |
539 | return 1; | |
540 | xcr0 = xcr; | |
541 | if (kvm_x86_ops->get_cpl(vcpu) != 0) | |
542 | return 1; | |
543 | if (!(xcr0 & XSTATE_FP)) | |
544 | return 1; | |
545 | if ((xcr0 & XSTATE_YMM) && !(xcr0 & XSTATE_SSE)) | |
546 | return 1; | |
547 | if (xcr0 & ~host_xcr0) | |
548 | return 1; | |
549 | vcpu->arch.xcr0 = xcr0; | |
550 | vcpu->guest_xcr0_loaded = 0; | |
551 | return 0; | |
552 | } | |
553 | ||
554 | int kvm_set_xcr(struct kvm_vcpu *vcpu, u32 index, u64 xcr) | |
555 | { | |
556 | if (__kvm_set_xcr(vcpu, index, xcr)) { | |
557 | kvm_inject_gp(vcpu, 0); | |
558 | return 1; | |
559 | } | |
560 | return 0; | |
561 | } | |
562 | EXPORT_SYMBOL_GPL(kvm_set_xcr); | |
563 | ||
564 | static bool guest_cpuid_has_xsave(struct kvm_vcpu *vcpu) | |
565 | { | |
566 | struct kvm_cpuid_entry2 *best; | |
567 | ||
568 | best = kvm_find_cpuid_entry(vcpu, 1, 0); | |
569 | return best && (best->ecx & bit(X86_FEATURE_XSAVE)); | |
570 | } | |
571 | ||
572 | static void update_cpuid(struct kvm_vcpu *vcpu) | |
573 | { | |
574 | struct kvm_cpuid_entry2 *best; | |
575 | ||
576 | best = kvm_find_cpuid_entry(vcpu, 1, 0); | |
577 | if (!best) | |
578 | return; | |
579 | ||
580 | /* Update OSXSAVE bit */ | |
581 | if (cpu_has_xsave && best->function == 0x1) { | |
582 | best->ecx &= ~(bit(X86_FEATURE_OSXSAVE)); | |
583 | if (kvm_read_cr4_bits(vcpu, X86_CR4_OSXSAVE)) | |
584 | best->ecx |= bit(X86_FEATURE_OSXSAVE); | |
585 | } | |
586 | } | |
587 | ||
a83b29c6 | 588 | int kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4) |
a03490ed | 589 | { |
fc78f519 | 590 | unsigned long old_cr4 = kvm_read_cr4(vcpu); |
a2edf57f AK |
591 | unsigned long pdptr_bits = X86_CR4_PGE | X86_CR4_PSE | X86_CR4_PAE; |
592 | ||
0f12244f GN |
593 | if (cr4 & CR4_RESERVED_BITS) |
594 | return 1; | |
a03490ed | 595 | |
2acf923e DC |
596 | if (!guest_cpuid_has_xsave(vcpu) && (cr4 & X86_CR4_OSXSAVE)) |
597 | return 1; | |
598 | ||
a03490ed | 599 | if (is_long_mode(vcpu)) { |
0f12244f GN |
600 | if (!(cr4 & X86_CR4_PAE)) |
601 | return 1; | |
a2edf57f AK |
602 | } else if (is_paging(vcpu) && (cr4 & X86_CR4_PAE) |
603 | && ((cr4 ^ old_cr4) & pdptr_bits) | |
9f8fe504 AK |
604 | && !load_pdptrs(vcpu, vcpu->arch.walk_mmu, |
605 | kvm_read_cr3(vcpu))) | |
0f12244f GN |
606 | return 1; |
607 | ||
608 | if (cr4 & X86_CR4_VMXE) | |
609 | return 1; | |
a03490ed | 610 | |
a03490ed | 611 | kvm_x86_ops->set_cr4(vcpu, cr4); |
62ad0755 | 612 | |
aad82703 SY |
613 | if ((cr4 ^ old_cr4) & pdptr_bits) |
614 | kvm_mmu_reset_context(vcpu); | |
0f12244f | 615 | |
2acf923e DC |
616 | if ((cr4 ^ old_cr4) & X86_CR4_OSXSAVE) |
617 | update_cpuid(vcpu); | |
618 | ||
0f12244f GN |
619 | return 0; |
620 | } | |
2d3ad1f4 | 621 | EXPORT_SYMBOL_GPL(kvm_set_cr4); |
a03490ed | 622 | |
2390218b | 623 | int kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3) |
a03490ed | 624 | { |
9f8fe504 | 625 | if (cr3 == kvm_read_cr3(vcpu) && !pdptrs_changed(vcpu)) { |
0ba73cda | 626 | kvm_mmu_sync_roots(vcpu); |
d835dfec | 627 | kvm_mmu_flush_tlb(vcpu); |
0f12244f | 628 | return 0; |
d835dfec AK |
629 | } |
630 | ||
a03490ed | 631 | if (is_long_mode(vcpu)) { |
0f12244f GN |
632 | if (cr3 & CR3_L_MODE_RESERVED_BITS) |
633 | return 1; | |
a03490ed CO |
634 | } else { |
635 | if (is_pae(vcpu)) { | |
0f12244f GN |
636 | if (cr3 & CR3_PAE_RESERVED_BITS) |
637 | return 1; | |
ff03a073 JR |
638 | if (is_paging(vcpu) && |
639 | !load_pdptrs(vcpu, vcpu->arch.walk_mmu, cr3)) | |
0f12244f | 640 | return 1; |
a03490ed CO |
641 | } |
642 | /* | |
643 | * We don't check reserved bits in nonpae mode, because | |
644 | * this isn't enforced, and VMware depends on this. | |
645 | */ | |
646 | } | |
647 | ||
a03490ed CO |
648 | /* |
649 | * Does the new cr3 value map to physical memory? (Note, we | |
650 | * catch an invalid cr3 even in real-mode, because it would | |
651 | * cause trouble later on when we turn on paging anyway.) | |
652 | * | |
653 | * A real CPU would silently accept an invalid cr3 and would | |
654 | * attempt to use it - with largely undefined (and often hard | |
655 | * to debug) behavior on the guest side. | |
656 | */ | |
657 | if (unlikely(!gfn_to_memslot(vcpu->kvm, cr3 >> PAGE_SHIFT))) | |
0f12244f GN |
658 | return 1; |
659 | vcpu->arch.cr3 = cr3; | |
aff48baa | 660 | __set_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail); |
0f12244f GN |
661 | vcpu->arch.mmu.new_cr3(vcpu); |
662 | return 0; | |
663 | } | |
2d3ad1f4 | 664 | EXPORT_SYMBOL_GPL(kvm_set_cr3); |
a03490ed | 665 | |
eea1cff9 | 666 | int kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8) |
a03490ed | 667 | { |
0f12244f GN |
668 | if (cr8 & CR8_RESERVED_BITS) |
669 | return 1; | |
a03490ed CO |
670 | if (irqchip_in_kernel(vcpu->kvm)) |
671 | kvm_lapic_set_tpr(vcpu, cr8); | |
672 | else | |
ad312c7c | 673 | vcpu->arch.cr8 = cr8; |
0f12244f GN |
674 | return 0; |
675 | } | |
2d3ad1f4 | 676 | EXPORT_SYMBOL_GPL(kvm_set_cr8); |
a03490ed | 677 | |
2d3ad1f4 | 678 | unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu) |
a03490ed CO |
679 | { |
680 | if (irqchip_in_kernel(vcpu->kvm)) | |
681 | return kvm_lapic_get_cr8(vcpu); | |
682 | else | |
ad312c7c | 683 | return vcpu->arch.cr8; |
a03490ed | 684 | } |
2d3ad1f4 | 685 | EXPORT_SYMBOL_GPL(kvm_get_cr8); |
a03490ed | 686 | |
338dbc97 | 687 | static int __kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val) |
020df079 GN |
688 | { |
689 | switch (dr) { | |
690 | case 0 ... 3: | |
691 | vcpu->arch.db[dr] = val; | |
692 | if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)) | |
693 | vcpu->arch.eff_db[dr] = val; | |
694 | break; | |
695 | case 4: | |
338dbc97 GN |
696 | if (kvm_read_cr4_bits(vcpu, X86_CR4_DE)) |
697 | return 1; /* #UD */ | |
020df079 GN |
698 | /* fall through */ |
699 | case 6: | |
338dbc97 GN |
700 | if (val & 0xffffffff00000000ULL) |
701 | return -1; /* #GP */ | |
020df079 GN |
702 | vcpu->arch.dr6 = (val & DR6_VOLATILE) | DR6_FIXED_1; |
703 | break; | |
704 | case 5: | |
338dbc97 GN |
705 | if (kvm_read_cr4_bits(vcpu, X86_CR4_DE)) |
706 | return 1; /* #UD */ | |
020df079 GN |
707 | /* fall through */ |
708 | default: /* 7 */ | |
338dbc97 GN |
709 | if (val & 0xffffffff00000000ULL) |
710 | return -1; /* #GP */ | |
020df079 GN |
711 | vcpu->arch.dr7 = (val & DR7_VOLATILE) | DR7_FIXED_1; |
712 | if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)) { | |
713 | kvm_x86_ops->set_dr7(vcpu, vcpu->arch.dr7); | |
714 | vcpu->arch.switch_db_regs = (val & DR7_BP_EN_MASK); | |
715 | } | |
716 | break; | |
717 | } | |
718 | ||
719 | return 0; | |
720 | } | |
338dbc97 GN |
721 | |
722 | int kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val) | |
723 | { | |
724 | int res; | |
725 | ||
726 | res = __kvm_set_dr(vcpu, dr, val); | |
727 | if (res > 0) | |
728 | kvm_queue_exception(vcpu, UD_VECTOR); | |
729 | else if (res < 0) | |
730 | kvm_inject_gp(vcpu, 0); | |
731 | ||
732 | return res; | |
733 | } | |
020df079 GN |
734 | EXPORT_SYMBOL_GPL(kvm_set_dr); |
735 | ||
338dbc97 | 736 | static int _kvm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *val) |
020df079 GN |
737 | { |
738 | switch (dr) { | |
739 | case 0 ... 3: | |
740 | *val = vcpu->arch.db[dr]; | |
741 | break; | |
742 | case 4: | |
338dbc97 | 743 | if (kvm_read_cr4_bits(vcpu, X86_CR4_DE)) |
020df079 | 744 | return 1; |
020df079 GN |
745 | /* fall through */ |
746 | case 6: | |
747 | *val = vcpu->arch.dr6; | |
748 | break; | |
749 | case 5: | |
338dbc97 | 750 | if (kvm_read_cr4_bits(vcpu, X86_CR4_DE)) |
020df079 | 751 | return 1; |
020df079 GN |
752 | /* fall through */ |
753 | default: /* 7 */ | |
754 | *val = vcpu->arch.dr7; | |
755 | break; | |
756 | } | |
757 | ||
758 | return 0; | |
759 | } | |
338dbc97 GN |
760 | |
761 | int kvm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *val) | |
762 | { | |
763 | if (_kvm_get_dr(vcpu, dr, val)) { | |
764 | kvm_queue_exception(vcpu, UD_VECTOR); | |
765 | return 1; | |
766 | } | |
767 | return 0; | |
768 | } | |
020df079 GN |
769 | EXPORT_SYMBOL_GPL(kvm_get_dr); |
770 | ||
043405e1 CO |
771 | /* |
772 | * List of msr numbers which we expose to userspace through KVM_GET_MSRS | |
773 | * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST. | |
774 | * | |
775 | * This list is modified at module load time to reflect the | |
e3267cbb GC |
776 | * capabilities of the host cpu. This capabilities test skips MSRs that are |
777 | * kvm-specific. Those are put in the beginning of the list. | |
043405e1 | 778 | */ |
e3267cbb | 779 | |
344d9588 | 780 | #define KVM_SAVE_MSRS_BEGIN 8 |
043405e1 | 781 | static u32 msrs_to_save[] = { |
e3267cbb | 782 | MSR_KVM_SYSTEM_TIME, MSR_KVM_WALL_CLOCK, |
11c6bffa | 783 | MSR_KVM_SYSTEM_TIME_NEW, MSR_KVM_WALL_CLOCK_NEW, |
55cd8e5a | 784 | HV_X64_MSR_GUEST_OS_ID, HV_X64_MSR_HYPERCALL, |
344d9588 | 785 | HV_X64_MSR_APIC_ASSIST_PAGE, MSR_KVM_ASYNC_PF_EN, |
043405e1 | 786 | MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP, |
8c06585d | 787 | MSR_STAR, |
043405e1 CO |
788 | #ifdef CONFIG_X86_64 |
789 | MSR_CSTAR, MSR_KERNEL_GS_BASE, MSR_SYSCALL_MASK, MSR_LSTAR, | |
790 | #endif | |
e90aa41e | 791 | MSR_IA32_TSC, MSR_IA32_CR_PAT, MSR_VM_HSAVE_PA |
043405e1 CO |
792 | }; |
793 | ||
794 | static unsigned num_msrs_to_save; | |
795 | ||
796 | static u32 emulated_msrs[] = { | |
797 | MSR_IA32_MISC_ENABLE, | |
908e75f3 AK |
798 | MSR_IA32_MCG_STATUS, |
799 | MSR_IA32_MCG_CTL, | |
043405e1 CO |
800 | }; |
801 | ||
b69e8cae | 802 | static int set_efer(struct kvm_vcpu *vcpu, u64 efer) |
15c4a640 | 803 | { |
aad82703 SY |
804 | u64 old_efer = vcpu->arch.efer; |
805 | ||
b69e8cae RJ |
806 | if (efer & efer_reserved_bits) |
807 | return 1; | |
15c4a640 CO |
808 | |
809 | if (is_paging(vcpu) | |
b69e8cae RJ |
810 | && (vcpu->arch.efer & EFER_LME) != (efer & EFER_LME)) |
811 | return 1; | |
15c4a640 | 812 | |
1b2fd70c AG |
813 | if (efer & EFER_FFXSR) { |
814 | struct kvm_cpuid_entry2 *feat; | |
815 | ||
816 | feat = kvm_find_cpuid_entry(vcpu, 0x80000001, 0); | |
b69e8cae RJ |
817 | if (!feat || !(feat->edx & bit(X86_FEATURE_FXSR_OPT))) |
818 | return 1; | |
1b2fd70c AG |
819 | } |
820 | ||
d8017474 AG |
821 | if (efer & EFER_SVME) { |
822 | struct kvm_cpuid_entry2 *feat; | |
823 | ||
824 | feat = kvm_find_cpuid_entry(vcpu, 0x80000001, 0); | |
b69e8cae RJ |
825 | if (!feat || !(feat->ecx & bit(X86_FEATURE_SVM))) |
826 | return 1; | |
d8017474 AG |
827 | } |
828 | ||
15c4a640 | 829 | efer &= ~EFER_LMA; |
f6801dff | 830 | efer |= vcpu->arch.efer & EFER_LMA; |
15c4a640 | 831 | |
a3d204e2 SY |
832 | kvm_x86_ops->set_efer(vcpu, efer); |
833 | ||
9645bb56 | 834 | vcpu->arch.mmu.base_role.nxe = (efer & EFER_NX) && !tdp_enabled; |
b69e8cae | 835 | |
aad82703 SY |
836 | /* Update reserved bits */ |
837 | if ((efer ^ old_efer) & EFER_NX) | |
838 | kvm_mmu_reset_context(vcpu); | |
839 | ||
b69e8cae | 840 | return 0; |
15c4a640 CO |
841 | } |
842 | ||
f2b4b7dd JR |
843 | void kvm_enable_efer_bits(u64 mask) |
844 | { | |
845 | efer_reserved_bits &= ~mask; | |
846 | } | |
847 | EXPORT_SYMBOL_GPL(kvm_enable_efer_bits); | |
848 | ||
849 | ||
15c4a640 CO |
850 | /* |
851 | * Writes msr value into into the appropriate "register". | |
852 | * Returns 0 on success, non-0 otherwise. | |
853 | * Assumes vcpu_load() was already called. | |
854 | */ | |
855 | int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data) | |
856 | { | |
857 | return kvm_x86_ops->set_msr(vcpu, msr_index, data); | |
858 | } | |
859 | ||
313a3dc7 CO |
860 | /* |
861 | * Adapt set_msr() to msr_io()'s calling convention | |
862 | */ | |
863 | static int do_set_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data) | |
864 | { | |
865 | return kvm_set_msr(vcpu, index, *data); | |
866 | } | |
867 | ||
18068523 GOC |
868 | static void kvm_write_wall_clock(struct kvm *kvm, gpa_t wall_clock) |
869 | { | |
9ed3c444 AK |
870 | int version; |
871 | int r; | |
50d0a0f9 | 872 | struct pvclock_wall_clock wc; |
923de3cf | 873 | struct timespec boot; |
18068523 GOC |
874 | |
875 | if (!wall_clock) | |
876 | return; | |
877 | ||
9ed3c444 AK |
878 | r = kvm_read_guest(kvm, wall_clock, &version, sizeof(version)); |
879 | if (r) | |
880 | return; | |
881 | ||
882 | if (version & 1) | |
883 | ++version; /* first time write, random junk */ | |
884 | ||
885 | ++version; | |
18068523 | 886 | |
18068523 GOC |
887 | kvm_write_guest(kvm, wall_clock, &version, sizeof(version)); |
888 | ||
50d0a0f9 GH |
889 | /* |
890 | * The guest calculates current wall clock time by adding | |
34c238a1 | 891 | * system time (updated by kvm_guest_time_update below) to the |
50d0a0f9 GH |
892 | * wall clock specified here. guest system time equals host |
893 | * system time for us, thus we must fill in host boot time here. | |
894 | */ | |
923de3cf | 895 | getboottime(&boot); |
50d0a0f9 GH |
896 | |
897 | wc.sec = boot.tv_sec; | |
898 | wc.nsec = boot.tv_nsec; | |
899 | wc.version = version; | |
18068523 GOC |
900 | |
901 | kvm_write_guest(kvm, wall_clock, &wc, sizeof(wc)); | |
902 | ||
903 | version++; | |
904 | kvm_write_guest(kvm, wall_clock, &version, sizeof(version)); | |
18068523 GOC |
905 | } |
906 | ||
50d0a0f9 GH |
907 | static uint32_t div_frac(uint32_t dividend, uint32_t divisor) |
908 | { | |
909 | uint32_t quotient, remainder; | |
910 | ||
911 | /* Don't try to replace with do_div(), this one calculates | |
912 | * "(dividend << 32) / divisor" */ | |
913 | __asm__ ( "divl %4" | |
914 | : "=a" (quotient), "=d" (remainder) | |
915 | : "0" (0), "1" (dividend), "r" (divisor) ); | |
916 | return quotient; | |
917 | } | |
918 | ||
5f4e3f88 ZA |
919 | static void kvm_get_time_scale(uint32_t scaled_khz, uint32_t base_khz, |
920 | s8 *pshift, u32 *pmultiplier) | |
50d0a0f9 | 921 | { |
5f4e3f88 | 922 | uint64_t scaled64; |
50d0a0f9 GH |
923 | int32_t shift = 0; |
924 | uint64_t tps64; | |
925 | uint32_t tps32; | |
926 | ||
5f4e3f88 ZA |
927 | tps64 = base_khz * 1000LL; |
928 | scaled64 = scaled_khz * 1000LL; | |
50933623 | 929 | while (tps64 > scaled64*2 || tps64 & 0xffffffff00000000ULL) { |
50d0a0f9 GH |
930 | tps64 >>= 1; |
931 | shift--; | |
932 | } | |
933 | ||
934 | tps32 = (uint32_t)tps64; | |
50933623 JK |
935 | while (tps32 <= scaled64 || scaled64 & 0xffffffff00000000ULL) { |
936 | if (scaled64 & 0xffffffff00000000ULL || tps32 & 0x80000000) | |
5f4e3f88 ZA |
937 | scaled64 >>= 1; |
938 | else | |
939 | tps32 <<= 1; | |
50d0a0f9 GH |
940 | shift++; |
941 | } | |
942 | ||
5f4e3f88 ZA |
943 | *pshift = shift; |
944 | *pmultiplier = div_frac(scaled64, tps32); | |
50d0a0f9 | 945 | |
5f4e3f88 ZA |
946 | pr_debug("%s: base_khz %u => %u, shift %d, mul %u\n", |
947 | __func__, base_khz, scaled_khz, shift, *pmultiplier); | |
50d0a0f9 GH |
948 | } |
949 | ||
759379dd ZA |
950 | static inline u64 get_kernel_ns(void) |
951 | { | |
952 | struct timespec ts; | |
953 | ||
954 | WARN_ON(preemptible()); | |
955 | ktime_get_ts(&ts); | |
956 | monotonic_to_bootbased(&ts); | |
957 | return timespec_to_ns(&ts); | |
50d0a0f9 GH |
958 | } |
959 | ||
c8076604 | 960 | static DEFINE_PER_CPU(unsigned long, cpu_tsc_khz); |
c285545f | 961 | unsigned long max_tsc_khz; |
c8076604 | 962 | |
8cfdc000 ZA |
963 | static inline int kvm_tsc_changes_freq(void) |
964 | { | |
965 | int cpu = get_cpu(); | |
966 | int ret = !boot_cpu_has(X86_FEATURE_CONSTANT_TSC) && | |
967 | cpufreq_quick_get(cpu) != 0; | |
968 | put_cpu(); | |
969 | return ret; | |
970 | } | |
971 | ||
1e993611 JR |
972 | static u64 vcpu_tsc_khz(struct kvm_vcpu *vcpu) |
973 | { | |
974 | if (vcpu->arch.virtual_tsc_khz) | |
975 | return vcpu->arch.virtual_tsc_khz; | |
976 | else | |
977 | return __this_cpu_read(cpu_tsc_khz); | |
978 | } | |
979 | ||
759379dd ZA |
980 | static inline u64 nsec_to_cycles(u64 nsec) |
981 | { | |
217fc9cf AK |
982 | u64 ret; |
983 | ||
759379dd ZA |
984 | WARN_ON(preemptible()); |
985 | if (kvm_tsc_changes_freq()) | |
986 | printk_once(KERN_WARNING | |
987 | "kvm: unreliable cycle conversion on adjustable rate TSC\n"); | |
0a3aee0d | 988 | ret = nsec * __this_cpu_read(cpu_tsc_khz); |
217fc9cf AK |
989 | do_div(ret, USEC_PER_SEC); |
990 | return ret; | |
759379dd ZA |
991 | } |
992 | ||
1e993611 | 993 | static void kvm_init_tsc_catchup(struct kvm_vcpu *vcpu, u32 this_tsc_khz) |
c285545f ZA |
994 | { |
995 | /* Compute a scale to convert nanoseconds in TSC cycles */ | |
996 | kvm_get_time_scale(this_tsc_khz, NSEC_PER_SEC / 1000, | |
1e993611 JR |
997 | &vcpu->arch.tsc_catchup_shift, |
998 | &vcpu->arch.tsc_catchup_mult); | |
c285545f ZA |
999 | } |
1000 | ||
1001 | static u64 compute_guest_tsc(struct kvm_vcpu *vcpu, s64 kernel_ns) | |
1002 | { | |
1003 | u64 tsc = pvclock_scale_delta(kernel_ns-vcpu->arch.last_tsc_nsec, | |
1e993611 JR |
1004 | vcpu->arch.tsc_catchup_mult, |
1005 | vcpu->arch.tsc_catchup_shift); | |
c285545f ZA |
1006 | tsc += vcpu->arch.last_tsc_write; |
1007 | return tsc; | |
1008 | } | |
1009 | ||
99e3e30a ZA |
1010 | void kvm_write_tsc(struct kvm_vcpu *vcpu, u64 data) |
1011 | { | |
1012 | struct kvm *kvm = vcpu->kvm; | |
f38e098f | 1013 | u64 offset, ns, elapsed; |
99e3e30a | 1014 | unsigned long flags; |
46543ba4 | 1015 | s64 sdiff; |
99e3e30a | 1016 | |
038f8c11 | 1017 | raw_spin_lock_irqsave(&kvm->arch.tsc_write_lock, flags); |
99e3e30a | 1018 | offset = data - native_read_tsc(); |
759379dd | 1019 | ns = get_kernel_ns(); |
f38e098f | 1020 | elapsed = ns - kvm->arch.last_tsc_nsec; |
46543ba4 ZA |
1021 | sdiff = data - kvm->arch.last_tsc_write; |
1022 | if (sdiff < 0) | |
1023 | sdiff = -sdiff; | |
f38e098f ZA |
1024 | |
1025 | /* | |
46543ba4 | 1026 | * Special case: close write to TSC within 5 seconds of |
f38e098f | 1027 | * another CPU is interpreted as an attempt to synchronize |
0d2eb44f | 1028 | * The 5 seconds is to accommodate host load / swapping as |
46543ba4 | 1029 | * well as any reset of TSC during the boot process. |
f38e098f ZA |
1030 | * |
1031 | * In that case, for a reliable TSC, we can match TSC offsets, | |
46543ba4 | 1032 | * or make a best guest using elapsed value. |
f38e098f | 1033 | */ |
46543ba4 ZA |
1034 | if (sdiff < nsec_to_cycles(5ULL * NSEC_PER_SEC) && |
1035 | elapsed < 5ULL * NSEC_PER_SEC) { | |
f38e098f ZA |
1036 | if (!check_tsc_unstable()) { |
1037 | offset = kvm->arch.last_tsc_offset; | |
1038 | pr_debug("kvm: matched tsc offset for %llu\n", data); | |
1039 | } else { | |
759379dd ZA |
1040 | u64 delta = nsec_to_cycles(elapsed); |
1041 | offset += delta; | |
1042 | pr_debug("kvm: adjusted tsc offset by %llu\n", delta); | |
f38e098f ZA |
1043 | } |
1044 | ns = kvm->arch.last_tsc_nsec; | |
1045 | } | |
1046 | kvm->arch.last_tsc_nsec = ns; | |
1047 | kvm->arch.last_tsc_write = data; | |
1048 | kvm->arch.last_tsc_offset = offset; | |
99e3e30a | 1049 | kvm_x86_ops->write_tsc_offset(vcpu, offset); |
038f8c11 | 1050 | raw_spin_unlock_irqrestore(&kvm->arch.tsc_write_lock, flags); |
99e3e30a ZA |
1051 | |
1052 | /* Reset of TSC must disable overshoot protection below */ | |
1053 | vcpu->arch.hv_clock.tsc_timestamp = 0; | |
c285545f ZA |
1054 | vcpu->arch.last_tsc_write = data; |
1055 | vcpu->arch.last_tsc_nsec = ns; | |
99e3e30a ZA |
1056 | } |
1057 | EXPORT_SYMBOL_GPL(kvm_write_tsc); | |
1058 | ||
34c238a1 | 1059 | static int kvm_guest_time_update(struct kvm_vcpu *v) |
18068523 | 1060 | { |
18068523 GOC |
1061 | unsigned long flags; |
1062 | struct kvm_vcpu_arch *vcpu = &v->arch; | |
1063 | void *shared_kaddr; | |
463656c0 | 1064 | unsigned long this_tsc_khz; |
1d5f066e ZA |
1065 | s64 kernel_ns, max_kernel_ns; |
1066 | u64 tsc_timestamp; | |
18068523 | 1067 | |
18068523 GOC |
1068 | /* Keep irq disabled to prevent changes to the clock */ |
1069 | local_irq_save(flags); | |
1d5f066e | 1070 | kvm_get_msr(v, MSR_IA32_TSC, &tsc_timestamp); |
759379dd | 1071 | kernel_ns = get_kernel_ns(); |
1e993611 | 1072 | this_tsc_khz = vcpu_tsc_khz(v); |
8cfdc000 | 1073 | if (unlikely(this_tsc_khz == 0)) { |
c285545f | 1074 | local_irq_restore(flags); |
34c238a1 | 1075 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, v); |
8cfdc000 ZA |
1076 | return 1; |
1077 | } | |
18068523 | 1078 | |
c285545f ZA |
1079 | /* |
1080 | * We may have to catch up the TSC to match elapsed wall clock | |
1081 | * time for two reasons, even if kvmclock is used. | |
1082 | * 1) CPU could have been running below the maximum TSC rate | |
1083 | * 2) Broken TSC compensation resets the base at each VCPU | |
1084 | * entry to avoid unknown leaps of TSC even when running | |
1085 | * again on the same CPU. This may cause apparent elapsed | |
1086 | * time to disappear, and the guest to stand still or run | |
1087 | * very slowly. | |
1088 | */ | |
1089 | if (vcpu->tsc_catchup) { | |
1090 | u64 tsc = compute_guest_tsc(v, kernel_ns); | |
1091 | if (tsc > tsc_timestamp) { | |
1092 | kvm_x86_ops->adjust_tsc_offset(v, tsc - tsc_timestamp); | |
1093 | tsc_timestamp = tsc; | |
1094 | } | |
50d0a0f9 GH |
1095 | } |
1096 | ||
18068523 GOC |
1097 | local_irq_restore(flags); |
1098 | ||
c285545f ZA |
1099 | if (!vcpu->time_page) |
1100 | return 0; | |
18068523 | 1101 | |
1d5f066e ZA |
1102 | /* |
1103 | * Time as measured by the TSC may go backwards when resetting the base | |
1104 | * tsc_timestamp. The reason for this is that the TSC resolution is | |
1105 | * higher than the resolution of the other clock scales. Thus, many | |
1106 | * possible measurments of the TSC correspond to one measurement of any | |
1107 | * other clock, and so a spread of values is possible. This is not a | |
1108 | * problem for the computation of the nanosecond clock; with TSC rates | |
1109 | * around 1GHZ, there can only be a few cycles which correspond to one | |
1110 | * nanosecond value, and any path through this code will inevitably | |
1111 | * take longer than that. However, with the kernel_ns value itself, | |
1112 | * the precision may be much lower, down to HZ granularity. If the | |
1113 | * first sampling of TSC against kernel_ns ends in the low part of the | |
1114 | * range, and the second in the high end of the range, we can get: | |
1115 | * | |
1116 | * (TSC - offset_low) * S + kns_old > (TSC - offset_high) * S + kns_new | |
1117 | * | |
1118 | * As the sampling errors potentially range in the thousands of cycles, | |
1119 | * it is possible such a time value has already been observed by the | |
1120 | * guest. To protect against this, we must compute the system time as | |
1121 | * observed by the guest and ensure the new system time is greater. | |
1122 | */ | |
1123 | max_kernel_ns = 0; | |
1124 | if (vcpu->hv_clock.tsc_timestamp && vcpu->last_guest_tsc) { | |
1125 | max_kernel_ns = vcpu->last_guest_tsc - | |
1126 | vcpu->hv_clock.tsc_timestamp; | |
1127 | max_kernel_ns = pvclock_scale_delta(max_kernel_ns, | |
1128 | vcpu->hv_clock.tsc_to_system_mul, | |
1129 | vcpu->hv_clock.tsc_shift); | |
1130 | max_kernel_ns += vcpu->last_kernel_ns; | |
1131 | } | |
afbcf7ab | 1132 | |
e48672fa | 1133 | if (unlikely(vcpu->hw_tsc_khz != this_tsc_khz)) { |
5f4e3f88 ZA |
1134 | kvm_get_time_scale(NSEC_PER_SEC / 1000, this_tsc_khz, |
1135 | &vcpu->hv_clock.tsc_shift, | |
1136 | &vcpu->hv_clock.tsc_to_system_mul); | |
e48672fa | 1137 | vcpu->hw_tsc_khz = this_tsc_khz; |
8cfdc000 ZA |
1138 | } |
1139 | ||
1d5f066e ZA |
1140 | if (max_kernel_ns > kernel_ns) |
1141 | kernel_ns = max_kernel_ns; | |
1142 | ||
8cfdc000 | 1143 | /* With all the info we got, fill in the values */ |
1d5f066e | 1144 | vcpu->hv_clock.tsc_timestamp = tsc_timestamp; |
759379dd | 1145 | vcpu->hv_clock.system_time = kernel_ns + v->kvm->arch.kvmclock_offset; |
1d5f066e | 1146 | vcpu->last_kernel_ns = kernel_ns; |
28e4639a | 1147 | vcpu->last_guest_tsc = tsc_timestamp; |
371bcf64 GC |
1148 | vcpu->hv_clock.flags = 0; |
1149 | ||
18068523 GOC |
1150 | /* |
1151 | * The interface expects us to write an even number signaling that the | |
1152 | * update is finished. Since the guest won't see the intermediate | |
50d0a0f9 | 1153 | * state, we just increase by 2 at the end. |
18068523 | 1154 | */ |
50d0a0f9 | 1155 | vcpu->hv_clock.version += 2; |
18068523 GOC |
1156 | |
1157 | shared_kaddr = kmap_atomic(vcpu->time_page, KM_USER0); | |
1158 | ||
1159 | memcpy(shared_kaddr + vcpu->time_offset, &vcpu->hv_clock, | |
50d0a0f9 | 1160 | sizeof(vcpu->hv_clock)); |
18068523 GOC |
1161 | |
1162 | kunmap_atomic(shared_kaddr, KM_USER0); | |
1163 | ||
1164 | mark_page_dirty(v->kvm, vcpu->time >> PAGE_SHIFT); | |
8cfdc000 | 1165 | return 0; |
c8076604 GH |
1166 | } |
1167 | ||
9ba075a6 AK |
1168 | static bool msr_mtrr_valid(unsigned msr) |
1169 | { | |
1170 | switch (msr) { | |
1171 | case 0x200 ... 0x200 + 2 * KVM_NR_VAR_MTRR - 1: | |
1172 | case MSR_MTRRfix64K_00000: | |
1173 | case MSR_MTRRfix16K_80000: | |
1174 | case MSR_MTRRfix16K_A0000: | |
1175 | case MSR_MTRRfix4K_C0000: | |
1176 | case MSR_MTRRfix4K_C8000: | |
1177 | case MSR_MTRRfix4K_D0000: | |
1178 | case MSR_MTRRfix4K_D8000: | |
1179 | case MSR_MTRRfix4K_E0000: | |
1180 | case MSR_MTRRfix4K_E8000: | |
1181 | case MSR_MTRRfix4K_F0000: | |
1182 | case MSR_MTRRfix4K_F8000: | |
1183 | case MSR_MTRRdefType: | |
1184 | case MSR_IA32_CR_PAT: | |
1185 | return true; | |
1186 | case 0x2f8: | |
1187 | return true; | |
1188 | } | |
1189 | return false; | |
1190 | } | |
1191 | ||
d6289b93 MT |
1192 | static bool valid_pat_type(unsigned t) |
1193 | { | |
1194 | return t < 8 && (1 << t) & 0xf3; /* 0, 1, 4, 5, 6, 7 */ | |
1195 | } | |
1196 | ||
1197 | static bool valid_mtrr_type(unsigned t) | |
1198 | { | |
1199 | return t < 8 && (1 << t) & 0x73; /* 0, 1, 4, 5, 6 */ | |
1200 | } | |
1201 | ||
1202 | static bool mtrr_valid(struct kvm_vcpu *vcpu, u32 msr, u64 data) | |
1203 | { | |
1204 | int i; | |
1205 | ||
1206 | if (!msr_mtrr_valid(msr)) | |
1207 | return false; | |
1208 | ||
1209 | if (msr == MSR_IA32_CR_PAT) { | |
1210 | for (i = 0; i < 8; i++) | |
1211 | if (!valid_pat_type((data >> (i * 8)) & 0xff)) | |
1212 | return false; | |
1213 | return true; | |
1214 | } else if (msr == MSR_MTRRdefType) { | |
1215 | if (data & ~0xcff) | |
1216 | return false; | |
1217 | return valid_mtrr_type(data & 0xff); | |
1218 | } else if (msr >= MSR_MTRRfix64K_00000 && msr <= MSR_MTRRfix4K_F8000) { | |
1219 | for (i = 0; i < 8 ; i++) | |
1220 | if (!valid_mtrr_type((data >> (i * 8)) & 0xff)) | |
1221 | return false; | |
1222 | return true; | |
1223 | } | |
1224 | ||
1225 | /* variable MTRRs */ | |
1226 | return valid_mtrr_type(data & 0xff); | |
1227 | } | |
1228 | ||
9ba075a6 AK |
1229 | static int set_msr_mtrr(struct kvm_vcpu *vcpu, u32 msr, u64 data) |
1230 | { | |
0bed3b56 SY |
1231 | u64 *p = (u64 *)&vcpu->arch.mtrr_state.fixed_ranges; |
1232 | ||
d6289b93 | 1233 | if (!mtrr_valid(vcpu, msr, data)) |
9ba075a6 AK |
1234 | return 1; |
1235 | ||
0bed3b56 SY |
1236 | if (msr == MSR_MTRRdefType) { |
1237 | vcpu->arch.mtrr_state.def_type = data; | |
1238 | vcpu->arch.mtrr_state.enabled = (data & 0xc00) >> 10; | |
1239 | } else if (msr == MSR_MTRRfix64K_00000) | |
1240 | p[0] = data; | |
1241 | else if (msr == MSR_MTRRfix16K_80000 || msr == MSR_MTRRfix16K_A0000) | |
1242 | p[1 + msr - MSR_MTRRfix16K_80000] = data; | |
1243 | else if (msr >= MSR_MTRRfix4K_C0000 && msr <= MSR_MTRRfix4K_F8000) | |
1244 | p[3 + msr - MSR_MTRRfix4K_C0000] = data; | |
1245 | else if (msr == MSR_IA32_CR_PAT) | |
1246 | vcpu->arch.pat = data; | |
1247 | else { /* Variable MTRRs */ | |
1248 | int idx, is_mtrr_mask; | |
1249 | u64 *pt; | |
1250 | ||
1251 | idx = (msr - 0x200) / 2; | |
1252 | is_mtrr_mask = msr - 0x200 - 2 * idx; | |
1253 | if (!is_mtrr_mask) | |
1254 | pt = | |
1255 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].base_lo; | |
1256 | else | |
1257 | pt = | |
1258 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].mask_lo; | |
1259 | *pt = data; | |
1260 | } | |
1261 | ||
1262 | kvm_mmu_reset_context(vcpu); | |
9ba075a6 AK |
1263 | return 0; |
1264 | } | |
15c4a640 | 1265 | |
890ca9ae | 1266 | static int set_msr_mce(struct kvm_vcpu *vcpu, u32 msr, u64 data) |
15c4a640 | 1267 | { |
890ca9ae HY |
1268 | u64 mcg_cap = vcpu->arch.mcg_cap; |
1269 | unsigned bank_num = mcg_cap & 0xff; | |
1270 | ||
15c4a640 | 1271 | switch (msr) { |
15c4a640 | 1272 | case MSR_IA32_MCG_STATUS: |
890ca9ae | 1273 | vcpu->arch.mcg_status = data; |
15c4a640 | 1274 | break; |
c7ac679c | 1275 | case MSR_IA32_MCG_CTL: |
890ca9ae HY |
1276 | if (!(mcg_cap & MCG_CTL_P)) |
1277 | return 1; | |
1278 | if (data != 0 && data != ~(u64)0) | |
1279 | return -1; | |
1280 | vcpu->arch.mcg_ctl = data; | |
1281 | break; | |
1282 | default: | |
1283 | if (msr >= MSR_IA32_MC0_CTL && | |
1284 | msr < MSR_IA32_MC0_CTL + 4 * bank_num) { | |
1285 | u32 offset = msr - MSR_IA32_MC0_CTL; | |
114be429 AP |
1286 | /* only 0 or all 1s can be written to IA32_MCi_CTL |
1287 | * some Linux kernels though clear bit 10 in bank 4 to | |
1288 | * workaround a BIOS/GART TBL issue on AMD K8s, ignore | |
1289 | * this to avoid an uncatched #GP in the guest | |
1290 | */ | |
890ca9ae | 1291 | if ((offset & 0x3) == 0 && |
114be429 | 1292 | data != 0 && (data | (1 << 10)) != ~(u64)0) |
890ca9ae HY |
1293 | return -1; |
1294 | vcpu->arch.mce_banks[offset] = data; | |
1295 | break; | |
1296 | } | |
1297 | return 1; | |
1298 | } | |
1299 | return 0; | |
1300 | } | |
1301 | ||
ffde22ac ES |
1302 | static int xen_hvm_config(struct kvm_vcpu *vcpu, u64 data) |
1303 | { | |
1304 | struct kvm *kvm = vcpu->kvm; | |
1305 | int lm = is_long_mode(vcpu); | |
1306 | u8 *blob_addr = lm ? (u8 *)(long)kvm->arch.xen_hvm_config.blob_addr_64 | |
1307 | : (u8 *)(long)kvm->arch.xen_hvm_config.blob_addr_32; | |
1308 | u8 blob_size = lm ? kvm->arch.xen_hvm_config.blob_size_64 | |
1309 | : kvm->arch.xen_hvm_config.blob_size_32; | |
1310 | u32 page_num = data & ~PAGE_MASK; | |
1311 | u64 page_addr = data & PAGE_MASK; | |
1312 | u8 *page; | |
1313 | int r; | |
1314 | ||
1315 | r = -E2BIG; | |
1316 | if (page_num >= blob_size) | |
1317 | goto out; | |
1318 | r = -ENOMEM; | |
1319 | page = kzalloc(PAGE_SIZE, GFP_KERNEL); | |
1320 | if (!page) | |
1321 | goto out; | |
1322 | r = -EFAULT; | |
1323 | if (copy_from_user(page, blob_addr + (page_num * PAGE_SIZE), PAGE_SIZE)) | |
1324 | goto out_free; | |
1325 | if (kvm_write_guest(kvm, page_addr, page, PAGE_SIZE)) | |
1326 | goto out_free; | |
1327 | r = 0; | |
1328 | out_free: | |
1329 | kfree(page); | |
1330 | out: | |
1331 | return r; | |
1332 | } | |
1333 | ||
55cd8e5a GN |
1334 | static bool kvm_hv_hypercall_enabled(struct kvm *kvm) |
1335 | { | |
1336 | return kvm->arch.hv_hypercall & HV_X64_MSR_HYPERCALL_ENABLE; | |
1337 | } | |
1338 | ||
1339 | static bool kvm_hv_msr_partition_wide(u32 msr) | |
1340 | { | |
1341 | bool r = false; | |
1342 | switch (msr) { | |
1343 | case HV_X64_MSR_GUEST_OS_ID: | |
1344 | case HV_X64_MSR_HYPERCALL: | |
1345 | r = true; | |
1346 | break; | |
1347 | } | |
1348 | ||
1349 | return r; | |
1350 | } | |
1351 | ||
1352 | static int set_msr_hyperv_pw(struct kvm_vcpu *vcpu, u32 msr, u64 data) | |
1353 | { | |
1354 | struct kvm *kvm = vcpu->kvm; | |
1355 | ||
1356 | switch (msr) { | |
1357 | case HV_X64_MSR_GUEST_OS_ID: | |
1358 | kvm->arch.hv_guest_os_id = data; | |
1359 | /* setting guest os id to zero disables hypercall page */ | |
1360 | if (!kvm->arch.hv_guest_os_id) | |
1361 | kvm->arch.hv_hypercall &= ~HV_X64_MSR_HYPERCALL_ENABLE; | |
1362 | break; | |
1363 | case HV_X64_MSR_HYPERCALL: { | |
1364 | u64 gfn; | |
1365 | unsigned long addr; | |
1366 | u8 instructions[4]; | |
1367 | ||
1368 | /* if guest os id is not set hypercall should remain disabled */ | |
1369 | if (!kvm->arch.hv_guest_os_id) | |
1370 | break; | |
1371 | if (!(data & HV_X64_MSR_HYPERCALL_ENABLE)) { | |
1372 | kvm->arch.hv_hypercall = data; | |
1373 | break; | |
1374 | } | |
1375 | gfn = data >> HV_X64_MSR_HYPERCALL_PAGE_ADDRESS_SHIFT; | |
1376 | addr = gfn_to_hva(kvm, gfn); | |
1377 | if (kvm_is_error_hva(addr)) | |
1378 | return 1; | |
1379 | kvm_x86_ops->patch_hypercall(vcpu, instructions); | |
1380 | ((unsigned char *)instructions)[3] = 0xc3; /* ret */ | |
1381 | if (copy_to_user((void __user *)addr, instructions, 4)) | |
1382 | return 1; | |
1383 | kvm->arch.hv_hypercall = data; | |
1384 | break; | |
1385 | } | |
1386 | default: | |
1387 | pr_unimpl(vcpu, "HYPER-V unimplemented wrmsr: 0x%x " | |
1388 | "data 0x%llx\n", msr, data); | |
1389 | return 1; | |
1390 | } | |
1391 | return 0; | |
1392 | } | |
1393 | ||
1394 | static int set_msr_hyperv(struct kvm_vcpu *vcpu, u32 msr, u64 data) | |
1395 | { | |
10388a07 GN |
1396 | switch (msr) { |
1397 | case HV_X64_MSR_APIC_ASSIST_PAGE: { | |
1398 | unsigned long addr; | |
55cd8e5a | 1399 | |
10388a07 GN |
1400 | if (!(data & HV_X64_MSR_APIC_ASSIST_PAGE_ENABLE)) { |
1401 | vcpu->arch.hv_vapic = data; | |
1402 | break; | |
1403 | } | |
1404 | addr = gfn_to_hva(vcpu->kvm, data >> | |
1405 | HV_X64_MSR_APIC_ASSIST_PAGE_ADDRESS_SHIFT); | |
1406 | if (kvm_is_error_hva(addr)) | |
1407 | return 1; | |
1408 | if (clear_user((void __user *)addr, PAGE_SIZE)) | |
1409 | return 1; | |
1410 | vcpu->arch.hv_vapic = data; | |
1411 | break; | |
1412 | } | |
1413 | case HV_X64_MSR_EOI: | |
1414 | return kvm_hv_vapic_msr_write(vcpu, APIC_EOI, data); | |
1415 | case HV_X64_MSR_ICR: | |
1416 | return kvm_hv_vapic_msr_write(vcpu, APIC_ICR, data); | |
1417 | case HV_X64_MSR_TPR: | |
1418 | return kvm_hv_vapic_msr_write(vcpu, APIC_TASKPRI, data); | |
1419 | default: | |
1420 | pr_unimpl(vcpu, "HYPER-V unimplemented wrmsr: 0x%x " | |
1421 | "data 0x%llx\n", msr, data); | |
1422 | return 1; | |
1423 | } | |
1424 | ||
1425 | return 0; | |
55cd8e5a GN |
1426 | } |
1427 | ||
344d9588 GN |
1428 | static int kvm_pv_enable_async_pf(struct kvm_vcpu *vcpu, u64 data) |
1429 | { | |
1430 | gpa_t gpa = data & ~0x3f; | |
1431 | ||
6adba527 GN |
1432 | /* Bits 2:5 are resrved, Should be zero */ |
1433 | if (data & 0x3c) | |
344d9588 GN |
1434 | return 1; |
1435 | ||
1436 | vcpu->arch.apf.msr_val = data; | |
1437 | ||
1438 | if (!(data & KVM_ASYNC_PF_ENABLED)) { | |
1439 | kvm_clear_async_pf_completion_queue(vcpu); | |
1440 | kvm_async_pf_hash_reset(vcpu); | |
1441 | return 0; | |
1442 | } | |
1443 | ||
1444 | if (kvm_gfn_to_hva_cache_init(vcpu->kvm, &vcpu->arch.apf.data, gpa)) | |
1445 | return 1; | |
1446 | ||
6adba527 | 1447 | vcpu->arch.apf.send_user_only = !(data & KVM_ASYNC_PF_SEND_ALWAYS); |
344d9588 GN |
1448 | kvm_async_pf_wakeup_all(vcpu); |
1449 | return 0; | |
1450 | } | |
1451 | ||
12f9a48f GC |
1452 | static void kvmclock_reset(struct kvm_vcpu *vcpu) |
1453 | { | |
1454 | if (vcpu->arch.time_page) { | |
1455 | kvm_release_page_dirty(vcpu->arch.time_page); | |
1456 | vcpu->arch.time_page = NULL; | |
1457 | } | |
1458 | } | |
1459 | ||
15c4a640 CO |
1460 | int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data) |
1461 | { | |
1462 | switch (msr) { | |
15c4a640 | 1463 | case MSR_EFER: |
b69e8cae | 1464 | return set_efer(vcpu, data); |
8f1589d9 AP |
1465 | case MSR_K7_HWCR: |
1466 | data &= ~(u64)0x40; /* ignore flush filter disable */ | |
82494028 | 1467 | data &= ~(u64)0x100; /* ignore ignne emulation enable */ |
8f1589d9 AP |
1468 | if (data != 0) { |
1469 | pr_unimpl(vcpu, "unimplemented HWCR wrmsr: 0x%llx\n", | |
1470 | data); | |
1471 | return 1; | |
1472 | } | |
15c4a640 | 1473 | break; |
f7c6d140 AP |
1474 | case MSR_FAM10H_MMIO_CONF_BASE: |
1475 | if (data != 0) { | |
1476 | pr_unimpl(vcpu, "unimplemented MMIO_CONF_BASE wrmsr: " | |
1477 | "0x%llx\n", data); | |
1478 | return 1; | |
1479 | } | |
15c4a640 | 1480 | break; |
c323c0e5 | 1481 | case MSR_AMD64_NB_CFG: |
c7ac679c | 1482 | break; |
b5e2fec0 AG |
1483 | case MSR_IA32_DEBUGCTLMSR: |
1484 | if (!data) { | |
1485 | /* We support the non-activated case already */ | |
1486 | break; | |
1487 | } else if (data & ~(DEBUGCTLMSR_LBR | DEBUGCTLMSR_BTF)) { | |
1488 | /* Values other than LBR and BTF are vendor-specific, | |
1489 | thus reserved and should throw a #GP */ | |
1490 | return 1; | |
1491 | } | |
1492 | pr_unimpl(vcpu, "%s: MSR_IA32_DEBUGCTLMSR 0x%llx, nop\n", | |
1493 | __func__, data); | |
1494 | break; | |
15c4a640 CO |
1495 | case MSR_IA32_UCODE_REV: |
1496 | case MSR_IA32_UCODE_WRITE: | |
61a6bd67 | 1497 | case MSR_VM_HSAVE_PA: |
6098ca93 | 1498 | case MSR_AMD64_PATCH_LOADER: |
15c4a640 | 1499 | break; |
9ba075a6 AK |
1500 | case 0x200 ... 0x2ff: |
1501 | return set_msr_mtrr(vcpu, msr, data); | |
15c4a640 CO |
1502 | case MSR_IA32_APICBASE: |
1503 | kvm_set_apic_base(vcpu, data); | |
1504 | break; | |
0105d1a5 GN |
1505 | case APIC_BASE_MSR ... APIC_BASE_MSR + 0x3ff: |
1506 | return kvm_x2apic_msr_write(vcpu, msr, data); | |
15c4a640 | 1507 | case MSR_IA32_MISC_ENABLE: |
ad312c7c | 1508 | vcpu->arch.ia32_misc_enable_msr = data; |
15c4a640 | 1509 | break; |
11c6bffa | 1510 | case MSR_KVM_WALL_CLOCK_NEW: |
18068523 GOC |
1511 | case MSR_KVM_WALL_CLOCK: |
1512 | vcpu->kvm->arch.wall_clock = data; | |
1513 | kvm_write_wall_clock(vcpu->kvm, data); | |
1514 | break; | |
11c6bffa | 1515 | case MSR_KVM_SYSTEM_TIME_NEW: |
18068523 | 1516 | case MSR_KVM_SYSTEM_TIME: { |
12f9a48f | 1517 | kvmclock_reset(vcpu); |
18068523 GOC |
1518 | |
1519 | vcpu->arch.time = data; | |
c285545f | 1520 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
18068523 GOC |
1521 | |
1522 | /* we verify if the enable bit is set... */ | |
1523 | if (!(data & 1)) | |
1524 | break; | |
1525 | ||
1526 | /* ...but clean it before doing the actual write */ | |
1527 | vcpu->arch.time_offset = data & ~(PAGE_MASK | 1); | |
1528 | ||
18068523 GOC |
1529 | vcpu->arch.time_page = |
1530 | gfn_to_page(vcpu->kvm, data >> PAGE_SHIFT); | |
18068523 GOC |
1531 | |
1532 | if (is_error_page(vcpu->arch.time_page)) { | |
1533 | kvm_release_page_clean(vcpu->arch.time_page); | |
1534 | vcpu->arch.time_page = NULL; | |
1535 | } | |
18068523 GOC |
1536 | break; |
1537 | } | |
344d9588 GN |
1538 | case MSR_KVM_ASYNC_PF_EN: |
1539 | if (kvm_pv_enable_async_pf(vcpu, data)) | |
1540 | return 1; | |
1541 | break; | |
890ca9ae HY |
1542 | case MSR_IA32_MCG_CTL: |
1543 | case MSR_IA32_MCG_STATUS: | |
1544 | case MSR_IA32_MC0_CTL ... MSR_IA32_MC0_CTL + 4 * KVM_MAX_MCE_BANKS - 1: | |
1545 | return set_msr_mce(vcpu, msr, data); | |
71db6023 AP |
1546 | |
1547 | /* Performance counters are not protected by a CPUID bit, | |
1548 | * so we should check all of them in the generic path for the sake of | |
1549 | * cross vendor migration. | |
1550 | * Writing a zero into the event select MSRs disables them, | |
1551 | * which we perfectly emulate ;-). Any other value should be at least | |
1552 | * reported, some guests depend on them. | |
1553 | */ | |
1554 | case MSR_P6_EVNTSEL0: | |
1555 | case MSR_P6_EVNTSEL1: | |
1556 | case MSR_K7_EVNTSEL0: | |
1557 | case MSR_K7_EVNTSEL1: | |
1558 | case MSR_K7_EVNTSEL2: | |
1559 | case MSR_K7_EVNTSEL3: | |
1560 | if (data != 0) | |
1561 | pr_unimpl(vcpu, "unimplemented perfctr wrmsr: " | |
1562 | "0x%x data 0x%llx\n", msr, data); | |
1563 | break; | |
1564 | /* at least RHEL 4 unconditionally writes to the perfctr registers, | |
1565 | * so we ignore writes to make it happy. | |
1566 | */ | |
1567 | case MSR_P6_PERFCTR0: | |
1568 | case MSR_P6_PERFCTR1: | |
1569 | case MSR_K7_PERFCTR0: | |
1570 | case MSR_K7_PERFCTR1: | |
1571 | case MSR_K7_PERFCTR2: | |
1572 | case MSR_K7_PERFCTR3: | |
1573 | pr_unimpl(vcpu, "unimplemented perfctr wrmsr: " | |
1574 | "0x%x data 0x%llx\n", msr, data); | |
1575 | break; | |
84e0cefa JS |
1576 | case MSR_K7_CLK_CTL: |
1577 | /* | |
1578 | * Ignore all writes to this no longer documented MSR. | |
1579 | * Writes are only relevant for old K7 processors, | |
1580 | * all pre-dating SVM, but a recommended workaround from | |
1581 | * AMD for these chips. It is possible to speicify the | |
1582 | * affected processor models on the command line, hence | |
1583 | * the need to ignore the workaround. | |
1584 | */ | |
1585 | break; | |
55cd8e5a GN |
1586 | case HV_X64_MSR_GUEST_OS_ID ... HV_X64_MSR_SINT15: |
1587 | if (kvm_hv_msr_partition_wide(msr)) { | |
1588 | int r; | |
1589 | mutex_lock(&vcpu->kvm->lock); | |
1590 | r = set_msr_hyperv_pw(vcpu, msr, data); | |
1591 | mutex_unlock(&vcpu->kvm->lock); | |
1592 | return r; | |
1593 | } else | |
1594 | return set_msr_hyperv(vcpu, msr, data); | |
1595 | break; | |
91c9c3ed | 1596 | case MSR_IA32_BBL_CR_CTL3: |
1597 | /* Drop writes to this legacy MSR -- see rdmsr | |
1598 | * counterpart for further detail. | |
1599 | */ | |
1600 | pr_unimpl(vcpu, "ignored wrmsr: 0x%x data %llx\n", msr, data); | |
1601 | break; | |
15c4a640 | 1602 | default: |
ffde22ac ES |
1603 | if (msr && (msr == vcpu->kvm->arch.xen_hvm_config.msr)) |
1604 | return xen_hvm_config(vcpu, data); | |
ed85c068 AP |
1605 | if (!ignore_msrs) { |
1606 | pr_unimpl(vcpu, "unhandled wrmsr: 0x%x data %llx\n", | |
1607 | msr, data); | |
1608 | return 1; | |
1609 | } else { | |
1610 | pr_unimpl(vcpu, "ignored wrmsr: 0x%x data %llx\n", | |
1611 | msr, data); | |
1612 | break; | |
1613 | } | |
15c4a640 CO |
1614 | } |
1615 | return 0; | |
1616 | } | |
1617 | EXPORT_SYMBOL_GPL(kvm_set_msr_common); | |
1618 | ||
1619 | ||
1620 | /* | |
1621 | * Reads an msr value (of 'msr_index') into 'pdata'. | |
1622 | * Returns 0 on success, non-0 otherwise. | |
1623 | * Assumes vcpu_load() was already called. | |
1624 | */ | |
1625 | int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata) | |
1626 | { | |
1627 | return kvm_x86_ops->get_msr(vcpu, msr_index, pdata); | |
1628 | } | |
1629 | ||
9ba075a6 AK |
1630 | static int get_msr_mtrr(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
1631 | { | |
0bed3b56 SY |
1632 | u64 *p = (u64 *)&vcpu->arch.mtrr_state.fixed_ranges; |
1633 | ||
9ba075a6 AK |
1634 | if (!msr_mtrr_valid(msr)) |
1635 | return 1; | |
1636 | ||
0bed3b56 SY |
1637 | if (msr == MSR_MTRRdefType) |
1638 | *pdata = vcpu->arch.mtrr_state.def_type + | |
1639 | (vcpu->arch.mtrr_state.enabled << 10); | |
1640 | else if (msr == MSR_MTRRfix64K_00000) | |
1641 | *pdata = p[0]; | |
1642 | else if (msr == MSR_MTRRfix16K_80000 || msr == MSR_MTRRfix16K_A0000) | |
1643 | *pdata = p[1 + msr - MSR_MTRRfix16K_80000]; | |
1644 | else if (msr >= MSR_MTRRfix4K_C0000 && msr <= MSR_MTRRfix4K_F8000) | |
1645 | *pdata = p[3 + msr - MSR_MTRRfix4K_C0000]; | |
1646 | else if (msr == MSR_IA32_CR_PAT) | |
1647 | *pdata = vcpu->arch.pat; | |
1648 | else { /* Variable MTRRs */ | |
1649 | int idx, is_mtrr_mask; | |
1650 | u64 *pt; | |
1651 | ||
1652 | idx = (msr - 0x200) / 2; | |
1653 | is_mtrr_mask = msr - 0x200 - 2 * idx; | |
1654 | if (!is_mtrr_mask) | |
1655 | pt = | |
1656 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].base_lo; | |
1657 | else | |
1658 | pt = | |
1659 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].mask_lo; | |
1660 | *pdata = *pt; | |
1661 | } | |
1662 | ||
9ba075a6 AK |
1663 | return 0; |
1664 | } | |
1665 | ||
890ca9ae | 1666 | static int get_msr_mce(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
15c4a640 CO |
1667 | { |
1668 | u64 data; | |
890ca9ae HY |
1669 | u64 mcg_cap = vcpu->arch.mcg_cap; |
1670 | unsigned bank_num = mcg_cap & 0xff; | |
15c4a640 CO |
1671 | |
1672 | switch (msr) { | |
15c4a640 CO |
1673 | case MSR_IA32_P5_MC_ADDR: |
1674 | case MSR_IA32_P5_MC_TYPE: | |
890ca9ae HY |
1675 | data = 0; |
1676 | break; | |
15c4a640 | 1677 | case MSR_IA32_MCG_CAP: |
890ca9ae HY |
1678 | data = vcpu->arch.mcg_cap; |
1679 | break; | |
c7ac679c | 1680 | case MSR_IA32_MCG_CTL: |
890ca9ae HY |
1681 | if (!(mcg_cap & MCG_CTL_P)) |
1682 | return 1; | |
1683 | data = vcpu->arch.mcg_ctl; | |
1684 | break; | |
1685 | case MSR_IA32_MCG_STATUS: | |
1686 | data = vcpu->arch.mcg_status; | |
1687 | break; | |
1688 | default: | |
1689 | if (msr >= MSR_IA32_MC0_CTL && | |
1690 | msr < MSR_IA32_MC0_CTL + 4 * bank_num) { | |
1691 | u32 offset = msr - MSR_IA32_MC0_CTL; | |
1692 | data = vcpu->arch.mce_banks[offset]; | |
1693 | break; | |
1694 | } | |
1695 | return 1; | |
1696 | } | |
1697 | *pdata = data; | |
1698 | return 0; | |
1699 | } | |
1700 | ||
55cd8e5a GN |
1701 | static int get_msr_hyperv_pw(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
1702 | { | |
1703 | u64 data = 0; | |
1704 | struct kvm *kvm = vcpu->kvm; | |
1705 | ||
1706 | switch (msr) { | |
1707 | case HV_X64_MSR_GUEST_OS_ID: | |
1708 | data = kvm->arch.hv_guest_os_id; | |
1709 | break; | |
1710 | case HV_X64_MSR_HYPERCALL: | |
1711 | data = kvm->arch.hv_hypercall; | |
1712 | break; | |
1713 | default: | |
1714 | pr_unimpl(vcpu, "Hyper-V unhandled rdmsr: 0x%x\n", msr); | |
1715 | return 1; | |
1716 | } | |
1717 | ||
1718 | *pdata = data; | |
1719 | return 0; | |
1720 | } | |
1721 | ||
1722 | static int get_msr_hyperv(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) | |
1723 | { | |
1724 | u64 data = 0; | |
1725 | ||
1726 | switch (msr) { | |
1727 | case HV_X64_MSR_VP_INDEX: { | |
1728 | int r; | |
1729 | struct kvm_vcpu *v; | |
1730 | kvm_for_each_vcpu(r, v, vcpu->kvm) | |
1731 | if (v == vcpu) | |
1732 | data = r; | |
1733 | break; | |
1734 | } | |
10388a07 GN |
1735 | case HV_X64_MSR_EOI: |
1736 | return kvm_hv_vapic_msr_read(vcpu, APIC_EOI, pdata); | |
1737 | case HV_X64_MSR_ICR: | |
1738 | return kvm_hv_vapic_msr_read(vcpu, APIC_ICR, pdata); | |
1739 | case HV_X64_MSR_TPR: | |
1740 | return kvm_hv_vapic_msr_read(vcpu, APIC_TASKPRI, pdata); | |
55cd8e5a GN |
1741 | default: |
1742 | pr_unimpl(vcpu, "Hyper-V unhandled rdmsr: 0x%x\n", msr); | |
1743 | return 1; | |
1744 | } | |
1745 | *pdata = data; | |
1746 | return 0; | |
1747 | } | |
1748 | ||
890ca9ae HY |
1749 | int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
1750 | { | |
1751 | u64 data; | |
1752 | ||
1753 | switch (msr) { | |
890ca9ae | 1754 | case MSR_IA32_PLATFORM_ID: |
15c4a640 | 1755 | case MSR_IA32_UCODE_REV: |
15c4a640 | 1756 | case MSR_IA32_EBL_CR_POWERON: |
b5e2fec0 AG |
1757 | case MSR_IA32_DEBUGCTLMSR: |
1758 | case MSR_IA32_LASTBRANCHFROMIP: | |
1759 | case MSR_IA32_LASTBRANCHTOIP: | |
1760 | case MSR_IA32_LASTINTFROMIP: | |
1761 | case MSR_IA32_LASTINTTOIP: | |
60af2ecd JSR |
1762 | case MSR_K8_SYSCFG: |
1763 | case MSR_K7_HWCR: | |
61a6bd67 | 1764 | case MSR_VM_HSAVE_PA: |
1f3ee616 AS |
1765 | case MSR_P6_PERFCTR0: |
1766 | case MSR_P6_PERFCTR1: | |
7fe29e0f AS |
1767 | case MSR_P6_EVNTSEL0: |
1768 | case MSR_P6_EVNTSEL1: | |
9e699624 | 1769 | case MSR_K7_EVNTSEL0: |
1f3ee616 | 1770 | case MSR_K7_PERFCTR0: |
1fdbd48c | 1771 | case MSR_K8_INT_PENDING_MSG: |
c323c0e5 | 1772 | case MSR_AMD64_NB_CFG: |
f7c6d140 | 1773 | case MSR_FAM10H_MMIO_CONF_BASE: |
15c4a640 CO |
1774 | data = 0; |
1775 | break; | |
9ba075a6 AK |
1776 | case MSR_MTRRcap: |
1777 | data = 0x500 | KVM_NR_VAR_MTRR; | |
1778 | break; | |
1779 | case 0x200 ... 0x2ff: | |
1780 | return get_msr_mtrr(vcpu, msr, pdata); | |
15c4a640 CO |
1781 | case 0xcd: /* fsb frequency */ |
1782 | data = 3; | |
1783 | break; | |
7b914098 JS |
1784 | /* |
1785 | * MSR_EBC_FREQUENCY_ID | |
1786 | * Conservative value valid for even the basic CPU models. | |
1787 | * Models 0,1: 000 in bits 23:21 indicating a bus speed of | |
1788 | * 100MHz, model 2 000 in bits 18:16 indicating 100MHz, | |
1789 | * and 266MHz for model 3, or 4. Set Core Clock | |
1790 | * Frequency to System Bus Frequency Ratio to 1 (bits | |
1791 | * 31:24) even though these are only valid for CPU | |
1792 | * models > 2, however guests may end up dividing or | |
1793 | * multiplying by zero otherwise. | |
1794 | */ | |
1795 | case MSR_EBC_FREQUENCY_ID: | |
1796 | data = 1 << 24; | |
1797 | break; | |
15c4a640 CO |
1798 | case MSR_IA32_APICBASE: |
1799 | data = kvm_get_apic_base(vcpu); | |
1800 | break; | |
0105d1a5 GN |
1801 | case APIC_BASE_MSR ... APIC_BASE_MSR + 0x3ff: |
1802 | return kvm_x2apic_msr_read(vcpu, msr, pdata); | |
1803 | break; | |
15c4a640 | 1804 | case MSR_IA32_MISC_ENABLE: |
ad312c7c | 1805 | data = vcpu->arch.ia32_misc_enable_msr; |
15c4a640 | 1806 | break; |
847f0ad8 AG |
1807 | case MSR_IA32_PERF_STATUS: |
1808 | /* TSC increment by tick */ | |
1809 | data = 1000ULL; | |
1810 | /* CPU multiplier */ | |
1811 | data |= (((uint64_t)4ULL) << 40); | |
1812 | break; | |
15c4a640 | 1813 | case MSR_EFER: |
f6801dff | 1814 | data = vcpu->arch.efer; |
15c4a640 | 1815 | break; |
18068523 | 1816 | case MSR_KVM_WALL_CLOCK: |
11c6bffa | 1817 | case MSR_KVM_WALL_CLOCK_NEW: |
18068523 GOC |
1818 | data = vcpu->kvm->arch.wall_clock; |
1819 | break; | |
1820 | case MSR_KVM_SYSTEM_TIME: | |
11c6bffa | 1821 | case MSR_KVM_SYSTEM_TIME_NEW: |
18068523 GOC |
1822 | data = vcpu->arch.time; |
1823 | break; | |
344d9588 GN |
1824 | case MSR_KVM_ASYNC_PF_EN: |
1825 | data = vcpu->arch.apf.msr_val; | |
1826 | break; | |
890ca9ae HY |
1827 | case MSR_IA32_P5_MC_ADDR: |
1828 | case MSR_IA32_P5_MC_TYPE: | |
1829 | case MSR_IA32_MCG_CAP: | |
1830 | case MSR_IA32_MCG_CTL: | |
1831 | case MSR_IA32_MCG_STATUS: | |
1832 | case MSR_IA32_MC0_CTL ... MSR_IA32_MC0_CTL + 4 * KVM_MAX_MCE_BANKS - 1: | |
1833 | return get_msr_mce(vcpu, msr, pdata); | |
84e0cefa JS |
1834 | case MSR_K7_CLK_CTL: |
1835 | /* | |
1836 | * Provide expected ramp-up count for K7. All other | |
1837 | * are set to zero, indicating minimum divisors for | |
1838 | * every field. | |
1839 | * | |
1840 | * This prevents guest kernels on AMD host with CPU | |
1841 | * type 6, model 8 and higher from exploding due to | |
1842 | * the rdmsr failing. | |
1843 | */ | |
1844 | data = 0x20000000; | |
1845 | break; | |
55cd8e5a GN |
1846 | case HV_X64_MSR_GUEST_OS_ID ... HV_X64_MSR_SINT15: |
1847 | if (kvm_hv_msr_partition_wide(msr)) { | |
1848 | int r; | |
1849 | mutex_lock(&vcpu->kvm->lock); | |
1850 | r = get_msr_hyperv_pw(vcpu, msr, pdata); | |
1851 | mutex_unlock(&vcpu->kvm->lock); | |
1852 | return r; | |
1853 | } else | |
1854 | return get_msr_hyperv(vcpu, msr, pdata); | |
1855 | break; | |
91c9c3ed | 1856 | case MSR_IA32_BBL_CR_CTL3: |
1857 | /* This legacy MSR exists but isn't fully documented in current | |
1858 | * silicon. It is however accessed by winxp in very narrow | |
1859 | * scenarios where it sets bit #19, itself documented as | |
1860 | * a "reserved" bit. Best effort attempt to source coherent | |
1861 | * read data here should the balance of the register be | |
1862 | * interpreted by the guest: | |
1863 | * | |
1864 | * L2 cache control register 3: 64GB range, 256KB size, | |
1865 | * enabled, latency 0x1, configured | |
1866 | */ | |
1867 | data = 0xbe702111; | |
1868 | break; | |
15c4a640 | 1869 | default: |
ed85c068 AP |
1870 | if (!ignore_msrs) { |
1871 | pr_unimpl(vcpu, "unhandled rdmsr: 0x%x\n", msr); | |
1872 | return 1; | |
1873 | } else { | |
1874 | pr_unimpl(vcpu, "ignored rdmsr: 0x%x\n", msr); | |
1875 | data = 0; | |
1876 | } | |
1877 | break; | |
15c4a640 CO |
1878 | } |
1879 | *pdata = data; | |
1880 | return 0; | |
1881 | } | |
1882 | EXPORT_SYMBOL_GPL(kvm_get_msr_common); | |
1883 | ||
313a3dc7 CO |
1884 | /* |
1885 | * Read or write a bunch of msrs. All parameters are kernel addresses. | |
1886 | * | |
1887 | * @return number of msrs set successfully. | |
1888 | */ | |
1889 | static int __msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs *msrs, | |
1890 | struct kvm_msr_entry *entries, | |
1891 | int (*do_msr)(struct kvm_vcpu *vcpu, | |
1892 | unsigned index, u64 *data)) | |
1893 | { | |
f656ce01 | 1894 | int i, idx; |
313a3dc7 | 1895 | |
f656ce01 | 1896 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
313a3dc7 CO |
1897 | for (i = 0; i < msrs->nmsrs; ++i) |
1898 | if (do_msr(vcpu, entries[i].index, &entries[i].data)) | |
1899 | break; | |
f656ce01 | 1900 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
313a3dc7 | 1901 | |
313a3dc7 CO |
1902 | return i; |
1903 | } | |
1904 | ||
1905 | /* | |
1906 | * Read or write a bunch of msrs. Parameters are user addresses. | |
1907 | * | |
1908 | * @return number of msrs set successfully. | |
1909 | */ | |
1910 | static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs, | |
1911 | int (*do_msr)(struct kvm_vcpu *vcpu, | |
1912 | unsigned index, u64 *data), | |
1913 | int writeback) | |
1914 | { | |
1915 | struct kvm_msrs msrs; | |
1916 | struct kvm_msr_entry *entries; | |
1917 | int r, n; | |
1918 | unsigned size; | |
1919 | ||
1920 | r = -EFAULT; | |
1921 | if (copy_from_user(&msrs, user_msrs, sizeof msrs)) | |
1922 | goto out; | |
1923 | ||
1924 | r = -E2BIG; | |
1925 | if (msrs.nmsrs >= MAX_IO_MSRS) | |
1926 | goto out; | |
1927 | ||
1928 | r = -ENOMEM; | |
1929 | size = sizeof(struct kvm_msr_entry) * msrs.nmsrs; | |
7a73c028 | 1930 | entries = kmalloc(size, GFP_KERNEL); |
313a3dc7 CO |
1931 | if (!entries) |
1932 | goto out; | |
1933 | ||
1934 | r = -EFAULT; | |
1935 | if (copy_from_user(entries, user_msrs->entries, size)) | |
1936 | goto out_free; | |
1937 | ||
1938 | r = n = __msr_io(vcpu, &msrs, entries, do_msr); | |
1939 | if (r < 0) | |
1940 | goto out_free; | |
1941 | ||
1942 | r = -EFAULT; | |
1943 | if (writeback && copy_to_user(user_msrs->entries, entries, size)) | |
1944 | goto out_free; | |
1945 | ||
1946 | r = n; | |
1947 | ||
1948 | out_free: | |
7a73c028 | 1949 | kfree(entries); |
313a3dc7 CO |
1950 | out: |
1951 | return r; | |
1952 | } | |
1953 | ||
018d00d2 ZX |
1954 | int kvm_dev_ioctl_check_extension(long ext) |
1955 | { | |
1956 | int r; | |
1957 | ||
1958 | switch (ext) { | |
1959 | case KVM_CAP_IRQCHIP: | |
1960 | case KVM_CAP_HLT: | |
1961 | case KVM_CAP_MMU_SHADOW_CACHE_CONTROL: | |
018d00d2 | 1962 | case KVM_CAP_SET_TSS_ADDR: |
07716717 | 1963 | case KVM_CAP_EXT_CPUID: |
c8076604 | 1964 | case KVM_CAP_CLOCKSOURCE: |
7837699f | 1965 | case KVM_CAP_PIT: |
a28e4f5a | 1966 | case KVM_CAP_NOP_IO_DELAY: |
62d9f0db | 1967 | case KVM_CAP_MP_STATE: |
ed848624 | 1968 | case KVM_CAP_SYNC_MMU: |
a355c85c | 1969 | case KVM_CAP_USER_NMI: |
52d939a0 | 1970 | case KVM_CAP_REINJECT_CONTROL: |
4925663a | 1971 | case KVM_CAP_IRQ_INJECT_STATUS: |
e56d532f | 1972 | case KVM_CAP_ASSIGN_DEV_IRQ: |
721eecbf | 1973 | case KVM_CAP_IRQFD: |
d34e6b17 | 1974 | case KVM_CAP_IOEVENTFD: |
c5ff41ce | 1975 | case KVM_CAP_PIT2: |
e9f42757 | 1976 | case KVM_CAP_PIT_STATE2: |
b927a3ce | 1977 | case KVM_CAP_SET_IDENTITY_MAP_ADDR: |
ffde22ac | 1978 | case KVM_CAP_XEN_HVM: |
afbcf7ab | 1979 | case KVM_CAP_ADJUST_CLOCK: |
3cfc3092 | 1980 | case KVM_CAP_VCPU_EVENTS: |
55cd8e5a | 1981 | case KVM_CAP_HYPERV: |
10388a07 | 1982 | case KVM_CAP_HYPERV_VAPIC: |
c25bc163 | 1983 | case KVM_CAP_HYPERV_SPIN: |
ab9f4ecb | 1984 | case KVM_CAP_PCI_SEGMENT: |
a1efbe77 | 1985 | case KVM_CAP_DEBUGREGS: |
d2be1651 | 1986 | case KVM_CAP_X86_ROBUST_SINGLESTEP: |
2d5b5a66 | 1987 | case KVM_CAP_XSAVE: |
344d9588 | 1988 | case KVM_CAP_ASYNC_PF: |
018d00d2 ZX |
1989 | r = 1; |
1990 | break; | |
542472b5 LV |
1991 | case KVM_CAP_COALESCED_MMIO: |
1992 | r = KVM_COALESCED_MMIO_PAGE_OFFSET; | |
1993 | break; | |
774ead3a AK |
1994 | case KVM_CAP_VAPIC: |
1995 | r = !kvm_x86_ops->cpu_has_accelerated_tpr(); | |
1996 | break; | |
f725230a AK |
1997 | case KVM_CAP_NR_VCPUS: |
1998 | r = KVM_MAX_VCPUS; | |
1999 | break; | |
a988b910 AK |
2000 | case KVM_CAP_NR_MEMSLOTS: |
2001 | r = KVM_MEMORY_SLOTS; | |
2002 | break; | |
a68a6a72 MT |
2003 | case KVM_CAP_PV_MMU: /* obsolete */ |
2004 | r = 0; | |
2f333bcb | 2005 | break; |
62c476c7 | 2006 | case KVM_CAP_IOMMU: |
19de40a8 | 2007 | r = iommu_found(); |
62c476c7 | 2008 | break; |
890ca9ae HY |
2009 | case KVM_CAP_MCE: |
2010 | r = KVM_MAX_MCE_BANKS; | |
2011 | break; | |
2d5b5a66 SY |
2012 | case KVM_CAP_XCRS: |
2013 | r = cpu_has_xsave; | |
2014 | break; | |
018d00d2 ZX |
2015 | default: |
2016 | r = 0; | |
2017 | break; | |
2018 | } | |
2019 | return r; | |
2020 | ||
2021 | } | |
2022 | ||
043405e1 CO |
2023 | long kvm_arch_dev_ioctl(struct file *filp, |
2024 | unsigned int ioctl, unsigned long arg) | |
2025 | { | |
2026 | void __user *argp = (void __user *)arg; | |
2027 | long r; | |
2028 | ||
2029 | switch (ioctl) { | |
2030 | case KVM_GET_MSR_INDEX_LIST: { | |
2031 | struct kvm_msr_list __user *user_msr_list = argp; | |
2032 | struct kvm_msr_list msr_list; | |
2033 | unsigned n; | |
2034 | ||
2035 | r = -EFAULT; | |
2036 | if (copy_from_user(&msr_list, user_msr_list, sizeof msr_list)) | |
2037 | goto out; | |
2038 | n = msr_list.nmsrs; | |
2039 | msr_list.nmsrs = num_msrs_to_save + ARRAY_SIZE(emulated_msrs); | |
2040 | if (copy_to_user(user_msr_list, &msr_list, sizeof msr_list)) | |
2041 | goto out; | |
2042 | r = -E2BIG; | |
e125e7b6 | 2043 | if (n < msr_list.nmsrs) |
043405e1 CO |
2044 | goto out; |
2045 | r = -EFAULT; | |
2046 | if (copy_to_user(user_msr_list->indices, &msrs_to_save, | |
2047 | num_msrs_to_save * sizeof(u32))) | |
2048 | goto out; | |
e125e7b6 | 2049 | if (copy_to_user(user_msr_list->indices + num_msrs_to_save, |
043405e1 CO |
2050 | &emulated_msrs, |
2051 | ARRAY_SIZE(emulated_msrs) * sizeof(u32))) | |
2052 | goto out; | |
2053 | r = 0; | |
2054 | break; | |
2055 | } | |
674eea0f AK |
2056 | case KVM_GET_SUPPORTED_CPUID: { |
2057 | struct kvm_cpuid2 __user *cpuid_arg = argp; | |
2058 | struct kvm_cpuid2 cpuid; | |
2059 | ||
2060 | r = -EFAULT; | |
2061 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
2062 | goto out; | |
2063 | r = kvm_dev_ioctl_get_supported_cpuid(&cpuid, | |
19355475 | 2064 | cpuid_arg->entries); |
674eea0f AK |
2065 | if (r) |
2066 | goto out; | |
2067 | ||
2068 | r = -EFAULT; | |
2069 | if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid)) | |
2070 | goto out; | |
2071 | r = 0; | |
2072 | break; | |
2073 | } | |
890ca9ae HY |
2074 | case KVM_X86_GET_MCE_CAP_SUPPORTED: { |
2075 | u64 mce_cap; | |
2076 | ||
2077 | mce_cap = KVM_MCE_CAP_SUPPORTED; | |
2078 | r = -EFAULT; | |
2079 | if (copy_to_user(argp, &mce_cap, sizeof mce_cap)) | |
2080 | goto out; | |
2081 | r = 0; | |
2082 | break; | |
2083 | } | |
043405e1 CO |
2084 | default: |
2085 | r = -EINVAL; | |
2086 | } | |
2087 | out: | |
2088 | return r; | |
2089 | } | |
2090 | ||
f5f48ee1 SY |
2091 | static void wbinvd_ipi(void *garbage) |
2092 | { | |
2093 | wbinvd(); | |
2094 | } | |
2095 | ||
2096 | static bool need_emulate_wbinvd(struct kvm_vcpu *vcpu) | |
2097 | { | |
2098 | return vcpu->kvm->arch.iommu_domain && | |
2099 | !(vcpu->kvm->arch.iommu_flags & KVM_IOMMU_CACHE_COHERENCY); | |
2100 | } | |
2101 | ||
313a3dc7 CO |
2102 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
2103 | { | |
f5f48ee1 SY |
2104 | /* Address WBINVD may be executed by guest */ |
2105 | if (need_emulate_wbinvd(vcpu)) { | |
2106 | if (kvm_x86_ops->has_wbinvd_exit()) | |
2107 | cpumask_set_cpu(cpu, vcpu->arch.wbinvd_dirty_mask); | |
2108 | else if (vcpu->cpu != -1 && vcpu->cpu != cpu) | |
2109 | smp_call_function_single(vcpu->cpu, | |
2110 | wbinvd_ipi, NULL, 1); | |
2111 | } | |
2112 | ||
313a3dc7 | 2113 | kvm_x86_ops->vcpu_load(vcpu, cpu); |
48434c20 | 2114 | if (unlikely(vcpu->cpu != cpu) || check_tsc_unstable()) { |
e48672fa ZA |
2115 | /* Make sure TSC doesn't go backwards */ |
2116 | s64 tsc_delta = !vcpu->arch.last_host_tsc ? 0 : | |
2117 | native_read_tsc() - vcpu->arch.last_host_tsc; | |
2118 | if (tsc_delta < 0) | |
2119 | mark_tsc_unstable("KVM discovered backwards TSC"); | |
c285545f | 2120 | if (check_tsc_unstable()) { |
e48672fa | 2121 | kvm_x86_ops->adjust_tsc_offset(vcpu, -tsc_delta); |
c285545f | 2122 | vcpu->arch.tsc_catchup = 1; |
c285545f | 2123 | } |
1aa8ceef | 2124 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
c285545f ZA |
2125 | if (vcpu->cpu != cpu) |
2126 | kvm_migrate_timers(vcpu); | |
e48672fa | 2127 | vcpu->cpu = cpu; |
6b7d7e76 | 2128 | } |
313a3dc7 CO |
2129 | } |
2130 | ||
2131 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
2132 | { | |
02daab21 | 2133 | kvm_x86_ops->vcpu_put(vcpu); |
1c11e713 | 2134 | kvm_put_guest_fpu(vcpu); |
e48672fa | 2135 | vcpu->arch.last_host_tsc = native_read_tsc(); |
313a3dc7 CO |
2136 | } |
2137 | ||
07716717 | 2138 | static int is_efer_nx(void) |
313a3dc7 | 2139 | { |
e286e86e | 2140 | unsigned long long efer = 0; |
313a3dc7 | 2141 | |
e286e86e | 2142 | rdmsrl_safe(MSR_EFER, &efer); |
07716717 DK |
2143 | return efer & EFER_NX; |
2144 | } | |
2145 | ||
2146 | static void cpuid_fix_nx_cap(struct kvm_vcpu *vcpu) | |
2147 | { | |
2148 | int i; | |
2149 | struct kvm_cpuid_entry2 *e, *entry; | |
2150 | ||
313a3dc7 | 2151 | entry = NULL; |
ad312c7c ZX |
2152 | for (i = 0; i < vcpu->arch.cpuid_nent; ++i) { |
2153 | e = &vcpu->arch.cpuid_entries[i]; | |
313a3dc7 CO |
2154 | if (e->function == 0x80000001) { |
2155 | entry = e; | |
2156 | break; | |
2157 | } | |
2158 | } | |
07716717 | 2159 | if (entry && (entry->edx & (1 << 20)) && !is_efer_nx()) { |
313a3dc7 CO |
2160 | entry->edx &= ~(1 << 20); |
2161 | printk(KERN_INFO "kvm: guest NX capability removed\n"); | |
2162 | } | |
2163 | } | |
2164 | ||
07716717 | 2165 | /* when an old userspace process fills a new kernel module */ |
313a3dc7 CO |
2166 | static int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu *vcpu, |
2167 | struct kvm_cpuid *cpuid, | |
2168 | struct kvm_cpuid_entry __user *entries) | |
07716717 DK |
2169 | { |
2170 | int r, i; | |
2171 | struct kvm_cpuid_entry *cpuid_entries; | |
2172 | ||
2173 | r = -E2BIG; | |
2174 | if (cpuid->nent > KVM_MAX_CPUID_ENTRIES) | |
2175 | goto out; | |
2176 | r = -ENOMEM; | |
2177 | cpuid_entries = vmalloc(sizeof(struct kvm_cpuid_entry) * cpuid->nent); | |
2178 | if (!cpuid_entries) | |
2179 | goto out; | |
2180 | r = -EFAULT; | |
2181 | if (copy_from_user(cpuid_entries, entries, | |
2182 | cpuid->nent * sizeof(struct kvm_cpuid_entry))) | |
2183 | goto out_free; | |
2184 | for (i = 0; i < cpuid->nent; i++) { | |
ad312c7c ZX |
2185 | vcpu->arch.cpuid_entries[i].function = cpuid_entries[i].function; |
2186 | vcpu->arch.cpuid_entries[i].eax = cpuid_entries[i].eax; | |
2187 | vcpu->arch.cpuid_entries[i].ebx = cpuid_entries[i].ebx; | |
2188 | vcpu->arch.cpuid_entries[i].ecx = cpuid_entries[i].ecx; | |
2189 | vcpu->arch.cpuid_entries[i].edx = cpuid_entries[i].edx; | |
2190 | vcpu->arch.cpuid_entries[i].index = 0; | |
2191 | vcpu->arch.cpuid_entries[i].flags = 0; | |
2192 | vcpu->arch.cpuid_entries[i].padding[0] = 0; | |
2193 | vcpu->arch.cpuid_entries[i].padding[1] = 0; | |
2194 | vcpu->arch.cpuid_entries[i].padding[2] = 0; | |
2195 | } | |
2196 | vcpu->arch.cpuid_nent = cpuid->nent; | |
07716717 DK |
2197 | cpuid_fix_nx_cap(vcpu); |
2198 | r = 0; | |
fc61b800 | 2199 | kvm_apic_set_version(vcpu); |
0e851880 | 2200 | kvm_x86_ops->cpuid_update(vcpu); |
2acf923e | 2201 | update_cpuid(vcpu); |
07716717 DK |
2202 | |
2203 | out_free: | |
2204 | vfree(cpuid_entries); | |
2205 | out: | |
2206 | return r; | |
2207 | } | |
2208 | ||
2209 | static int kvm_vcpu_ioctl_set_cpuid2(struct kvm_vcpu *vcpu, | |
19355475 AS |
2210 | struct kvm_cpuid2 *cpuid, |
2211 | struct kvm_cpuid_entry2 __user *entries) | |
313a3dc7 CO |
2212 | { |
2213 | int r; | |
2214 | ||
2215 | r = -E2BIG; | |
2216 | if (cpuid->nent > KVM_MAX_CPUID_ENTRIES) | |
2217 | goto out; | |
2218 | r = -EFAULT; | |
ad312c7c | 2219 | if (copy_from_user(&vcpu->arch.cpuid_entries, entries, |
07716717 | 2220 | cpuid->nent * sizeof(struct kvm_cpuid_entry2))) |
313a3dc7 | 2221 | goto out; |
ad312c7c | 2222 | vcpu->arch.cpuid_nent = cpuid->nent; |
fc61b800 | 2223 | kvm_apic_set_version(vcpu); |
0e851880 | 2224 | kvm_x86_ops->cpuid_update(vcpu); |
2acf923e | 2225 | update_cpuid(vcpu); |
313a3dc7 CO |
2226 | return 0; |
2227 | ||
2228 | out: | |
2229 | return r; | |
2230 | } | |
2231 | ||
07716717 | 2232 | static int kvm_vcpu_ioctl_get_cpuid2(struct kvm_vcpu *vcpu, |
19355475 AS |
2233 | struct kvm_cpuid2 *cpuid, |
2234 | struct kvm_cpuid_entry2 __user *entries) | |
07716717 DK |
2235 | { |
2236 | int r; | |
2237 | ||
2238 | r = -E2BIG; | |
ad312c7c | 2239 | if (cpuid->nent < vcpu->arch.cpuid_nent) |
07716717 DK |
2240 | goto out; |
2241 | r = -EFAULT; | |
ad312c7c | 2242 | if (copy_to_user(entries, &vcpu->arch.cpuid_entries, |
19355475 | 2243 | vcpu->arch.cpuid_nent * sizeof(struct kvm_cpuid_entry2))) |
07716717 DK |
2244 | goto out; |
2245 | return 0; | |
2246 | ||
2247 | out: | |
ad312c7c | 2248 | cpuid->nent = vcpu->arch.cpuid_nent; |
07716717 DK |
2249 | return r; |
2250 | } | |
2251 | ||
945ee35e AK |
2252 | static void cpuid_mask(u32 *word, int wordnum) |
2253 | { | |
2254 | *word &= boot_cpu_data.x86_capability[wordnum]; | |
2255 | } | |
2256 | ||
07716717 | 2257 | static void do_cpuid_1_ent(struct kvm_cpuid_entry2 *entry, u32 function, |
19355475 | 2258 | u32 index) |
07716717 DK |
2259 | { |
2260 | entry->function = function; | |
2261 | entry->index = index; | |
2262 | cpuid_count(entry->function, entry->index, | |
19355475 | 2263 | &entry->eax, &entry->ebx, &entry->ecx, &entry->edx); |
07716717 DK |
2264 | entry->flags = 0; |
2265 | } | |
2266 | ||
7faa4ee1 AK |
2267 | #define F(x) bit(X86_FEATURE_##x) |
2268 | ||
07716717 DK |
2269 | static void do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function, |
2270 | u32 index, int *nent, int maxnent) | |
2271 | { | |
7faa4ee1 | 2272 | unsigned f_nx = is_efer_nx() ? F(NX) : 0; |
07716717 | 2273 | #ifdef CONFIG_X86_64 |
17cc3935 SY |
2274 | unsigned f_gbpages = (kvm_x86_ops->get_lpage_level() == PT_PDPE_LEVEL) |
2275 | ? F(GBPAGES) : 0; | |
7faa4ee1 AK |
2276 | unsigned f_lm = F(LM); |
2277 | #else | |
17cc3935 | 2278 | unsigned f_gbpages = 0; |
7faa4ee1 | 2279 | unsigned f_lm = 0; |
07716717 | 2280 | #endif |
4e47c7a6 | 2281 | unsigned f_rdtscp = kvm_x86_ops->rdtscp_supported() ? F(RDTSCP) : 0; |
7faa4ee1 AK |
2282 | |
2283 | /* cpuid 1.edx */ | |
2284 | const u32 kvm_supported_word0_x86_features = | |
2285 | F(FPU) | F(VME) | F(DE) | F(PSE) | | |
2286 | F(TSC) | F(MSR) | F(PAE) | F(MCE) | | |
2287 | F(CX8) | F(APIC) | 0 /* Reserved */ | F(SEP) | | |
2288 | F(MTRR) | F(PGE) | F(MCA) | F(CMOV) | | |
2289 | F(PAT) | F(PSE36) | 0 /* PSN */ | F(CLFLSH) | | |
2290 | 0 /* Reserved, DS, ACPI */ | F(MMX) | | |
2291 | F(FXSR) | F(XMM) | F(XMM2) | F(SELFSNOOP) | | |
2292 | 0 /* HTT, TM, Reserved, PBE */; | |
2293 | /* cpuid 0x80000001.edx */ | |
2294 | const u32 kvm_supported_word1_x86_features = | |
2295 | F(FPU) | F(VME) | F(DE) | F(PSE) | | |
2296 | F(TSC) | F(MSR) | F(PAE) | F(MCE) | | |
2297 | F(CX8) | F(APIC) | 0 /* Reserved */ | F(SYSCALL) | | |
2298 | F(MTRR) | F(PGE) | F(MCA) | F(CMOV) | | |
2299 | F(PAT) | F(PSE36) | 0 /* Reserved */ | | |
2300 | f_nx | 0 /* Reserved */ | F(MMXEXT) | F(MMX) | | |
4e47c7a6 | 2301 | F(FXSR) | F(FXSR_OPT) | f_gbpages | f_rdtscp | |
7faa4ee1 AK |
2302 | 0 /* Reserved */ | f_lm | F(3DNOWEXT) | F(3DNOW); |
2303 | /* cpuid 1.ecx */ | |
2304 | const u32 kvm_supported_word4_x86_features = | |
6c3f6041 | 2305 | F(XMM3) | F(PCLMULQDQ) | 0 /* DTES64, MONITOR */ | |
d149c731 AK |
2306 | 0 /* DS-CPL, VMX, SMX, EST */ | |
2307 | 0 /* TM2 */ | F(SSSE3) | 0 /* CNXT-ID */ | 0 /* Reserved */ | | |
2308 | 0 /* Reserved */ | F(CX16) | 0 /* xTPR Update, PDCM */ | | |
2309 | 0 /* Reserved, DCA */ | F(XMM4_1) | | |
0105d1a5 | 2310 | F(XMM4_2) | F(X2APIC) | F(MOVBE) | F(POPCNT) | |
6d886fd0 AP |
2311 | 0 /* Reserved*/ | F(AES) | F(XSAVE) | 0 /* OSXSAVE */ | F(AVX) | |
2312 | F(F16C); | |
7faa4ee1 | 2313 | /* cpuid 0x80000001.ecx */ |
07716717 | 2314 | const u32 kvm_supported_word6_x86_features = |
4c62a2dc | 2315 | F(LAHF_LM) | F(CMP_LEGACY) | 0 /*SVM*/ | 0 /* ExtApicSpace */ | |
7faa4ee1 | 2316 | F(CR8_LEGACY) | F(ABM) | F(SSE4A) | F(MISALIGNSSE) | |
7ef8aa72 | 2317 | F(3DNOWPREFETCH) | 0 /* OSVW */ | 0 /* IBS */ | F(XOP) | |
6d886fd0 | 2318 | 0 /* SKINIT, WDT, LWP */ | F(FMA4) | F(TBM); |
07716717 | 2319 | |
19355475 | 2320 | /* all calls to cpuid_count() should be made on the same cpu */ |
07716717 DK |
2321 | get_cpu(); |
2322 | do_cpuid_1_ent(entry, function, index); | |
2323 | ++*nent; | |
2324 | ||
2325 | switch (function) { | |
2326 | case 0: | |
2acf923e | 2327 | entry->eax = min(entry->eax, (u32)0xd); |
07716717 DK |
2328 | break; |
2329 | case 1: | |
2330 | entry->edx &= kvm_supported_word0_x86_features; | |
945ee35e | 2331 | cpuid_mask(&entry->edx, 0); |
7faa4ee1 | 2332 | entry->ecx &= kvm_supported_word4_x86_features; |
945ee35e | 2333 | cpuid_mask(&entry->ecx, 4); |
0d1de2d9 GN |
2334 | /* we support x2apic emulation even if host does not support |
2335 | * it since we emulate x2apic in software */ | |
2336 | entry->ecx |= F(X2APIC); | |
07716717 DK |
2337 | break; |
2338 | /* function 2 entries are STATEFUL. That is, repeated cpuid commands | |
2339 | * may return different values. This forces us to get_cpu() before | |
2340 | * issuing the first command, and also to emulate this annoying behavior | |
2341 | * in kvm_emulate_cpuid() using KVM_CPUID_FLAG_STATE_READ_NEXT */ | |
2342 | case 2: { | |
2343 | int t, times = entry->eax & 0xff; | |
2344 | ||
2345 | entry->flags |= KVM_CPUID_FLAG_STATEFUL_FUNC; | |
0fdf8e59 | 2346 | entry->flags |= KVM_CPUID_FLAG_STATE_READ_NEXT; |
07716717 DK |
2347 | for (t = 1; t < times && *nent < maxnent; ++t) { |
2348 | do_cpuid_1_ent(&entry[t], function, 0); | |
2349 | entry[t].flags |= KVM_CPUID_FLAG_STATEFUL_FUNC; | |
2350 | ++*nent; | |
2351 | } | |
2352 | break; | |
2353 | } | |
2354 | /* function 4 and 0xb have additional index. */ | |
2355 | case 4: { | |
14af3f3c | 2356 | int i, cache_type; |
07716717 DK |
2357 | |
2358 | entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX; | |
2359 | /* read more entries until cache_type is zero */ | |
14af3f3c HH |
2360 | for (i = 1; *nent < maxnent; ++i) { |
2361 | cache_type = entry[i - 1].eax & 0x1f; | |
07716717 DK |
2362 | if (!cache_type) |
2363 | break; | |
14af3f3c HH |
2364 | do_cpuid_1_ent(&entry[i], function, i); |
2365 | entry[i].flags |= | |
07716717 DK |
2366 | KVM_CPUID_FLAG_SIGNIFCANT_INDEX; |
2367 | ++*nent; | |
2368 | } | |
2369 | break; | |
2370 | } | |
2371 | case 0xb: { | |
14af3f3c | 2372 | int i, level_type; |
07716717 DK |
2373 | |
2374 | entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX; | |
2375 | /* read more entries until level_type is zero */ | |
14af3f3c | 2376 | for (i = 1; *nent < maxnent; ++i) { |
0853d2c1 | 2377 | level_type = entry[i - 1].ecx & 0xff00; |
07716717 DK |
2378 | if (!level_type) |
2379 | break; | |
14af3f3c HH |
2380 | do_cpuid_1_ent(&entry[i], function, i); |
2381 | entry[i].flags |= | |
07716717 DK |
2382 | KVM_CPUID_FLAG_SIGNIFCANT_INDEX; |
2383 | ++*nent; | |
2384 | } | |
2385 | break; | |
2386 | } | |
2acf923e DC |
2387 | case 0xd: { |
2388 | int i; | |
2389 | ||
2390 | entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX; | |
20800bc9 AP |
2391 | for (i = 1; *nent < maxnent && i < 64; ++i) { |
2392 | if (entry[i].eax == 0) | |
2393 | continue; | |
2acf923e DC |
2394 | do_cpuid_1_ent(&entry[i], function, i); |
2395 | entry[i].flags |= | |
2396 | KVM_CPUID_FLAG_SIGNIFCANT_INDEX; | |
2397 | ++*nent; | |
2398 | } | |
2399 | break; | |
2400 | } | |
84478c82 GC |
2401 | case KVM_CPUID_SIGNATURE: { |
2402 | char signature[12] = "KVMKVMKVM\0\0"; | |
2403 | u32 *sigptr = (u32 *)signature; | |
2404 | entry->eax = 0; | |
2405 | entry->ebx = sigptr[0]; | |
2406 | entry->ecx = sigptr[1]; | |
2407 | entry->edx = sigptr[2]; | |
2408 | break; | |
2409 | } | |
2410 | case KVM_CPUID_FEATURES: | |
2411 | entry->eax = (1 << KVM_FEATURE_CLOCKSOURCE) | | |
2412 | (1 << KVM_FEATURE_NOP_IO_DELAY) | | |
371bcf64 | 2413 | (1 << KVM_FEATURE_CLOCKSOURCE2) | |
32918924 | 2414 | (1 << KVM_FEATURE_ASYNC_PF) | |
371bcf64 | 2415 | (1 << KVM_FEATURE_CLOCKSOURCE_STABLE_BIT); |
84478c82 GC |
2416 | entry->ebx = 0; |
2417 | entry->ecx = 0; | |
2418 | entry->edx = 0; | |
2419 | break; | |
07716717 DK |
2420 | case 0x80000000: |
2421 | entry->eax = min(entry->eax, 0x8000001a); | |
2422 | break; | |
2423 | case 0x80000001: | |
2424 | entry->edx &= kvm_supported_word1_x86_features; | |
945ee35e | 2425 | cpuid_mask(&entry->edx, 1); |
07716717 | 2426 | entry->ecx &= kvm_supported_word6_x86_features; |
945ee35e | 2427 | cpuid_mask(&entry->ecx, 6); |
07716717 DK |
2428 | break; |
2429 | } | |
d4330ef2 JR |
2430 | |
2431 | kvm_x86_ops->set_supported_cpuid(function, entry); | |
2432 | ||
07716717 DK |
2433 | put_cpu(); |
2434 | } | |
2435 | ||
7faa4ee1 AK |
2436 | #undef F |
2437 | ||
674eea0f | 2438 | static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2 *cpuid, |
19355475 | 2439 | struct kvm_cpuid_entry2 __user *entries) |
07716717 DK |
2440 | { |
2441 | struct kvm_cpuid_entry2 *cpuid_entries; | |
2442 | int limit, nent = 0, r = -E2BIG; | |
2443 | u32 func; | |
2444 | ||
2445 | if (cpuid->nent < 1) | |
2446 | goto out; | |
6a544355 AK |
2447 | if (cpuid->nent > KVM_MAX_CPUID_ENTRIES) |
2448 | cpuid->nent = KVM_MAX_CPUID_ENTRIES; | |
07716717 DK |
2449 | r = -ENOMEM; |
2450 | cpuid_entries = vmalloc(sizeof(struct kvm_cpuid_entry2) * cpuid->nent); | |
2451 | if (!cpuid_entries) | |
2452 | goto out; | |
2453 | ||
2454 | do_cpuid_ent(&cpuid_entries[0], 0, 0, &nent, cpuid->nent); | |
2455 | limit = cpuid_entries[0].eax; | |
2456 | for (func = 1; func <= limit && nent < cpuid->nent; ++func) | |
2457 | do_cpuid_ent(&cpuid_entries[nent], func, 0, | |
19355475 | 2458 | &nent, cpuid->nent); |
07716717 DK |
2459 | r = -E2BIG; |
2460 | if (nent >= cpuid->nent) | |
2461 | goto out_free; | |
2462 | ||
2463 | do_cpuid_ent(&cpuid_entries[nent], 0x80000000, 0, &nent, cpuid->nent); | |
2464 | limit = cpuid_entries[nent - 1].eax; | |
2465 | for (func = 0x80000001; func <= limit && nent < cpuid->nent; ++func) | |
2466 | do_cpuid_ent(&cpuid_entries[nent], func, 0, | |
19355475 | 2467 | &nent, cpuid->nent); |
84478c82 GC |
2468 | |
2469 | ||
2470 | ||
2471 | r = -E2BIG; | |
2472 | if (nent >= cpuid->nent) | |
2473 | goto out_free; | |
2474 | ||
2475 | do_cpuid_ent(&cpuid_entries[nent], KVM_CPUID_SIGNATURE, 0, &nent, | |
2476 | cpuid->nent); | |
2477 | ||
2478 | r = -E2BIG; | |
2479 | if (nent >= cpuid->nent) | |
2480 | goto out_free; | |
2481 | ||
2482 | do_cpuid_ent(&cpuid_entries[nent], KVM_CPUID_FEATURES, 0, &nent, | |
2483 | cpuid->nent); | |
2484 | ||
cb007648 MM |
2485 | r = -E2BIG; |
2486 | if (nent >= cpuid->nent) | |
2487 | goto out_free; | |
2488 | ||
07716717 DK |
2489 | r = -EFAULT; |
2490 | if (copy_to_user(entries, cpuid_entries, | |
19355475 | 2491 | nent * sizeof(struct kvm_cpuid_entry2))) |
07716717 DK |
2492 | goto out_free; |
2493 | cpuid->nent = nent; | |
2494 | r = 0; | |
2495 | ||
2496 | out_free: | |
2497 | vfree(cpuid_entries); | |
2498 | out: | |
2499 | return r; | |
2500 | } | |
2501 | ||
313a3dc7 CO |
2502 | static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu *vcpu, |
2503 | struct kvm_lapic_state *s) | |
2504 | { | |
ad312c7c | 2505 | memcpy(s->regs, vcpu->arch.apic->regs, sizeof *s); |
313a3dc7 CO |
2506 | |
2507 | return 0; | |
2508 | } | |
2509 | ||
2510 | static int kvm_vcpu_ioctl_set_lapic(struct kvm_vcpu *vcpu, | |
2511 | struct kvm_lapic_state *s) | |
2512 | { | |
ad312c7c | 2513 | memcpy(vcpu->arch.apic->regs, s->regs, sizeof *s); |
313a3dc7 | 2514 | kvm_apic_post_state_restore(vcpu); |
cb142eb7 | 2515 | update_cr8_intercept(vcpu); |
313a3dc7 CO |
2516 | |
2517 | return 0; | |
2518 | } | |
2519 | ||
f77bc6a4 ZX |
2520 | static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, |
2521 | struct kvm_interrupt *irq) | |
2522 | { | |
2523 | if (irq->irq < 0 || irq->irq >= 256) | |
2524 | return -EINVAL; | |
2525 | if (irqchip_in_kernel(vcpu->kvm)) | |
2526 | return -ENXIO; | |
f77bc6a4 | 2527 | |
66fd3f7f | 2528 | kvm_queue_interrupt(vcpu, irq->irq, false); |
3842d135 | 2529 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
f77bc6a4 | 2530 | |
f77bc6a4 ZX |
2531 | return 0; |
2532 | } | |
2533 | ||
c4abb7c9 JK |
2534 | static int kvm_vcpu_ioctl_nmi(struct kvm_vcpu *vcpu) |
2535 | { | |
c4abb7c9 | 2536 | kvm_inject_nmi(vcpu); |
c4abb7c9 JK |
2537 | |
2538 | return 0; | |
2539 | } | |
2540 | ||
b209749f AK |
2541 | static int vcpu_ioctl_tpr_access_reporting(struct kvm_vcpu *vcpu, |
2542 | struct kvm_tpr_access_ctl *tac) | |
2543 | { | |
2544 | if (tac->flags) | |
2545 | return -EINVAL; | |
2546 | vcpu->arch.tpr_access_reporting = !!tac->enabled; | |
2547 | return 0; | |
2548 | } | |
2549 | ||
890ca9ae HY |
2550 | static int kvm_vcpu_ioctl_x86_setup_mce(struct kvm_vcpu *vcpu, |
2551 | u64 mcg_cap) | |
2552 | { | |
2553 | int r; | |
2554 | unsigned bank_num = mcg_cap & 0xff, bank; | |
2555 | ||
2556 | r = -EINVAL; | |
a9e38c3e | 2557 | if (!bank_num || bank_num >= KVM_MAX_MCE_BANKS) |
890ca9ae HY |
2558 | goto out; |
2559 | if (mcg_cap & ~(KVM_MCE_CAP_SUPPORTED | 0xff | 0xff0000)) | |
2560 | goto out; | |
2561 | r = 0; | |
2562 | vcpu->arch.mcg_cap = mcg_cap; | |
2563 | /* Init IA32_MCG_CTL to all 1s */ | |
2564 | if (mcg_cap & MCG_CTL_P) | |
2565 | vcpu->arch.mcg_ctl = ~(u64)0; | |
2566 | /* Init IA32_MCi_CTL to all 1s */ | |
2567 | for (bank = 0; bank < bank_num; bank++) | |
2568 | vcpu->arch.mce_banks[bank*4] = ~(u64)0; | |
2569 | out: | |
2570 | return r; | |
2571 | } | |
2572 | ||
2573 | static int kvm_vcpu_ioctl_x86_set_mce(struct kvm_vcpu *vcpu, | |
2574 | struct kvm_x86_mce *mce) | |
2575 | { | |
2576 | u64 mcg_cap = vcpu->arch.mcg_cap; | |
2577 | unsigned bank_num = mcg_cap & 0xff; | |
2578 | u64 *banks = vcpu->arch.mce_banks; | |
2579 | ||
2580 | if (mce->bank >= bank_num || !(mce->status & MCI_STATUS_VAL)) | |
2581 | return -EINVAL; | |
2582 | /* | |
2583 | * if IA32_MCG_CTL is not all 1s, the uncorrected error | |
2584 | * reporting is disabled | |
2585 | */ | |
2586 | if ((mce->status & MCI_STATUS_UC) && (mcg_cap & MCG_CTL_P) && | |
2587 | vcpu->arch.mcg_ctl != ~(u64)0) | |
2588 | return 0; | |
2589 | banks += 4 * mce->bank; | |
2590 | /* | |
2591 | * if IA32_MCi_CTL is not all 1s, the uncorrected error | |
2592 | * reporting is disabled for the bank | |
2593 | */ | |
2594 | if ((mce->status & MCI_STATUS_UC) && banks[0] != ~(u64)0) | |
2595 | return 0; | |
2596 | if (mce->status & MCI_STATUS_UC) { | |
2597 | if ((vcpu->arch.mcg_status & MCG_STATUS_MCIP) || | |
fc78f519 | 2598 | !kvm_read_cr4_bits(vcpu, X86_CR4_MCE)) { |
a8eeb04a | 2599 | kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu); |
890ca9ae HY |
2600 | return 0; |
2601 | } | |
2602 | if (banks[1] & MCI_STATUS_VAL) | |
2603 | mce->status |= MCI_STATUS_OVER; | |
2604 | banks[2] = mce->addr; | |
2605 | banks[3] = mce->misc; | |
2606 | vcpu->arch.mcg_status = mce->mcg_status; | |
2607 | banks[1] = mce->status; | |
2608 | kvm_queue_exception(vcpu, MC_VECTOR); | |
2609 | } else if (!(banks[1] & MCI_STATUS_VAL) | |
2610 | || !(banks[1] & MCI_STATUS_UC)) { | |
2611 | if (banks[1] & MCI_STATUS_VAL) | |
2612 | mce->status |= MCI_STATUS_OVER; | |
2613 | banks[2] = mce->addr; | |
2614 | banks[3] = mce->misc; | |
2615 | banks[1] = mce->status; | |
2616 | } else | |
2617 | banks[1] |= MCI_STATUS_OVER; | |
2618 | return 0; | |
2619 | } | |
2620 | ||
3cfc3092 JK |
2621 | static void kvm_vcpu_ioctl_x86_get_vcpu_events(struct kvm_vcpu *vcpu, |
2622 | struct kvm_vcpu_events *events) | |
2623 | { | |
03b82a30 JK |
2624 | events->exception.injected = |
2625 | vcpu->arch.exception.pending && | |
2626 | !kvm_exception_is_soft(vcpu->arch.exception.nr); | |
3cfc3092 JK |
2627 | events->exception.nr = vcpu->arch.exception.nr; |
2628 | events->exception.has_error_code = vcpu->arch.exception.has_error_code; | |
97e69aa6 | 2629 | events->exception.pad = 0; |
3cfc3092 JK |
2630 | events->exception.error_code = vcpu->arch.exception.error_code; |
2631 | ||
03b82a30 JK |
2632 | events->interrupt.injected = |
2633 | vcpu->arch.interrupt.pending && !vcpu->arch.interrupt.soft; | |
3cfc3092 | 2634 | events->interrupt.nr = vcpu->arch.interrupt.nr; |
03b82a30 | 2635 | events->interrupt.soft = 0; |
48005f64 JK |
2636 | events->interrupt.shadow = |
2637 | kvm_x86_ops->get_interrupt_shadow(vcpu, | |
2638 | KVM_X86_SHADOW_INT_MOV_SS | KVM_X86_SHADOW_INT_STI); | |
3cfc3092 JK |
2639 | |
2640 | events->nmi.injected = vcpu->arch.nmi_injected; | |
2641 | events->nmi.pending = vcpu->arch.nmi_pending; | |
2642 | events->nmi.masked = kvm_x86_ops->get_nmi_mask(vcpu); | |
97e69aa6 | 2643 | events->nmi.pad = 0; |
3cfc3092 JK |
2644 | |
2645 | events->sipi_vector = vcpu->arch.sipi_vector; | |
2646 | ||
dab4b911 | 2647 | events->flags = (KVM_VCPUEVENT_VALID_NMI_PENDING |
48005f64 JK |
2648 | | KVM_VCPUEVENT_VALID_SIPI_VECTOR |
2649 | | KVM_VCPUEVENT_VALID_SHADOW); | |
97e69aa6 | 2650 | memset(&events->reserved, 0, sizeof(events->reserved)); |
3cfc3092 JK |
2651 | } |
2652 | ||
2653 | static int kvm_vcpu_ioctl_x86_set_vcpu_events(struct kvm_vcpu *vcpu, | |
2654 | struct kvm_vcpu_events *events) | |
2655 | { | |
dab4b911 | 2656 | if (events->flags & ~(KVM_VCPUEVENT_VALID_NMI_PENDING |
48005f64 JK |
2657 | | KVM_VCPUEVENT_VALID_SIPI_VECTOR |
2658 | | KVM_VCPUEVENT_VALID_SHADOW)) | |
3cfc3092 JK |
2659 | return -EINVAL; |
2660 | ||
3cfc3092 JK |
2661 | vcpu->arch.exception.pending = events->exception.injected; |
2662 | vcpu->arch.exception.nr = events->exception.nr; | |
2663 | vcpu->arch.exception.has_error_code = events->exception.has_error_code; | |
2664 | vcpu->arch.exception.error_code = events->exception.error_code; | |
2665 | ||
2666 | vcpu->arch.interrupt.pending = events->interrupt.injected; | |
2667 | vcpu->arch.interrupt.nr = events->interrupt.nr; | |
2668 | vcpu->arch.interrupt.soft = events->interrupt.soft; | |
48005f64 JK |
2669 | if (events->flags & KVM_VCPUEVENT_VALID_SHADOW) |
2670 | kvm_x86_ops->set_interrupt_shadow(vcpu, | |
2671 | events->interrupt.shadow); | |
3cfc3092 JK |
2672 | |
2673 | vcpu->arch.nmi_injected = events->nmi.injected; | |
dab4b911 JK |
2674 | if (events->flags & KVM_VCPUEVENT_VALID_NMI_PENDING) |
2675 | vcpu->arch.nmi_pending = events->nmi.pending; | |
3cfc3092 JK |
2676 | kvm_x86_ops->set_nmi_mask(vcpu, events->nmi.masked); |
2677 | ||
dab4b911 JK |
2678 | if (events->flags & KVM_VCPUEVENT_VALID_SIPI_VECTOR) |
2679 | vcpu->arch.sipi_vector = events->sipi_vector; | |
3cfc3092 | 2680 | |
3842d135 AK |
2681 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
2682 | ||
3cfc3092 JK |
2683 | return 0; |
2684 | } | |
2685 | ||
a1efbe77 JK |
2686 | static void kvm_vcpu_ioctl_x86_get_debugregs(struct kvm_vcpu *vcpu, |
2687 | struct kvm_debugregs *dbgregs) | |
2688 | { | |
a1efbe77 JK |
2689 | memcpy(dbgregs->db, vcpu->arch.db, sizeof(vcpu->arch.db)); |
2690 | dbgregs->dr6 = vcpu->arch.dr6; | |
2691 | dbgregs->dr7 = vcpu->arch.dr7; | |
2692 | dbgregs->flags = 0; | |
97e69aa6 | 2693 | memset(&dbgregs->reserved, 0, sizeof(dbgregs->reserved)); |
a1efbe77 JK |
2694 | } |
2695 | ||
2696 | static int kvm_vcpu_ioctl_x86_set_debugregs(struct kvm_vcpu *vcpu, | |
2697 | struct kvm_debugregs *dbgregs) | |
2698 | { | |
2699 | if (dbgregs->flags) | |
2700 | return -EINVAL; | |
2701 | ||
a1efbe77 JK |
2702 | memcpy(vcpu->arch.db, dbgregs->db, sizeof(vcpu->arch.db)); |
2703 | vcpu->arch.dr6 = dbgregs->dr6; | |
2704 | vcpu->arch.dr7 = dbgregs->dr7; | |
2705 | ||
a1efbe77 JK |
2706 | return 0; |
2707 | } | |
2708 | ||
2d5b5a66 SY |
2709 | static void kvm_vcpu_ioctl_x86_get_xsave(struct kvm_vcpu *vcpu, |
2710 | struct kvm_xsave *guest_xsave) | |
2711 | { | |
2712 | if (cpu_has_xsave) | |
2713 | memcpy(guest_xsave->region, | |
2714 | &vcpu->arch.guest_fpu.state->xsave, | |
f45755b8 | 2715 | xstate_size); |
2d5b5a66 SY |
2716 | else { |
2717 | memcpy(guest_xsave->region, | |
2718 | &vcpu->arch.guest_fpu.state->fxsave, | |
2719 | sizeof(struct i387_fxsave_struct)); | |
2720 | *(u64 *)&guest_xsave->region[XSAVE_HDR_OFFSET / sizeof(u32)] = | |
2721 | XSTATE_FPSSE; | |
2722 | } | |
2723 | } | |
2724 | ||
2725 | static int kvm_vcpu_ioctl_x86_set_xsave(struct kvm_vcpu *vcpu, | |
2726 | struct kvm_xsave *guest_xsave) | |
2727 | { | |
2728 | u64 xstate_bv = | |
2729 | *(u64 *)&guest_xsave->region[XSAVE_HDR_OFFSET / sizeof(u32)]; | |
2730 | ||
2731 | if (cpu_has_xsave) | |
2732 | memcpy(&vcpu->arch.guest_fpu.state->xsave, | |
f45755b8 | 2733 | guest_xsave->region, xstate_size); |
2d5b5a66 SY |
2734 | else { |
2735 | if (xstate_bv & ~XSTATE_FPSSE) | |
2736 | return -EINVAL; | |
2737 | memcpy(&vcpu->arch.guest_fpu.state->fxsave, | |
2738 | guest_xsave->region, sizeof(struct i387_fxsave_struct)); | |
2739 | } | |
2740 | return 0; | |
2741 | } | |
2742 | ||
2743 | static void kvm_vcpu_ioctl_x86_get_xcrs(struct kvm_vcpu *vcpu, | |
2744 | struct kvm_xcrs *guest_xcrs) | |
2745 | { | |
2746 | if (!cpu_has_xsave) { | |
2747 | guest_xcrs->nr_xcrs = 0; | |
2748 | return; | |
2749 | } | |
2750 | ||
2751 | guest_xcrs->nr_xcrs = 1; | |
2752 | guest_xcrs->flags = 0; | |
2753 | guest_xcrs->xcrs[0].xcr = XCR_XFEATURE_ENABLED_MASK; | |
2754 | guest_xcrs->xcrs[0].value = vcpu->arch.xcr0; | |
2755 | } | |
2756 | ||
2757 | static int kvm_vcpu_ioctl_x86_set_xcrs(struct kvm_vcpu *vcpu, | |
2758 | struct kvm_xcrs *guest_xcrs) | |
2759 | { | |
2760 | int i, r = 0; | |
2761 | ||
2762 | if (!cpu_has_xsave) | |
2763 | return -EINVAL; | |
2764 | ||
2765 | if (guest_xcrs->nr_xcrs > KVM_MAX_XCRS || guest_xcrs->flags) | |
2766 | return -EINVAL; | |
2767 | ||
2768 | for (i = 0; i < guest_xcrs->nr_xcrs; i++) | |
2769 | /* Only support XCR0 currently */ | |
2770 | if (guest_xcrs->xcrs[0].xcr == XCR_XFEATURE_ENABLED_MASK) { | |
2771 | r = __kvm_set_xcr(vcpu, XCR_XFEATURE_ENABLED_MASK, | |
2772 | guest_xcrs->xcrs[0].value); | |
2773 | break; | |
2774 | } | |
2775 | if (r) | |
2776 | r = -EINVAL; | |
2777 | return r; | |
2778 | } | |
2779 | ||
313a3dc7 CO |
2780 | long kvm_arch_vcpu_ioctl(struct file *filp, |
2781 | unsigned int ioctl, unsigned long arg) | |
2782 | { | |
2783 | struct kvm_vcpu *vcpu = filp->private_data; | |
2784 | void __user *argp = (void __user *)arg; | |
2785 | int r; | |
d1ac91d8 AK |
2786 | union { |
2787 | struct kvm_lapic_state *lapic; | |
2788 | struct kvm_xsave *xsave; | |
2789 | struct kvm_xcrs *xcrs; | |
2790 | void *buffer; | |
2791 | } u; | |
2792 | ||
2793 | u.buffer = NULL; | |
313a3dc7 CO |
2794 | switch (ioctl) { |
2795 | case KVM_GET_LAPIC: { | |
2204ae3c MT |
2796 | r = -EINVAL; |
2797 | if (!vcpu->arch.apic) | |
2798 | goto out; | |
d1ac91d8 | 2799 | u.lapic = kzalloc(sizeof(struct kvm_lapic_state), GFP_KERNEL); |
313a3dc7 | 2800 | |
b772ff36 | 2801 | r = -ENOMEM; |
d1ac91d8 | 2802 | if (!u.lapic) |
b772ff36 | 2803 | goto out; |
d1ac91d8 | 2804 | r = kvm_vcpu_ioctl_get_lapic(vcpu, u.lapic); |
313a3dc7 CO |
2805 | if (r) |
2806 | goto out; | |
2807 | r = -EFAULT; | |
d1ac91d8 | 2808 | if (copy_to_user(argp, u.lapic, sizeof(struct kvm_lapic_state))) |
313a3dc7 CO |
2809 | goto out; |
2810 | r = 0; | |
2811 | break; | |
2812 | } | |
2813 | case KVM_SET_LAPIC: { | |
2204ae3c MT |
2814 | r = -EINVAL; |
2815 | if (!vcpu->arch.apic) | |
2816 | goto out; | |
d1ac91d8 | 2817 | u.lapic = kmalloc(sizeof(struct kvm_lapic_state), GFP_KERNEL); |
b772ff36 | 2818 | r = -ENOMEM; |
d1ac91d8 | 2819 | if (!u.lapic) |
b772ff36 | 2820 | goto out; |
313a3dc7 | 2821 | r = -EFAULT; |
d1ac91d8 | 2822 | if (copy_from_user(u.lapic, argp, sizeof(struct kvm_lapic_state))) |
313a3dc7 | 2823 | goto out; |
d1ac91d8 | 2824 | r = kvm_vcpu_ioctl_set_lapic(vcpu, u.lapic); |
313a3dc7 CO |
2825 | if (r) |
2826 | goto out; | |
2827 | r = 0; | |
2828 | break; | |
2829 | } | |
f77bc6a4 ZX |
2830 | case KVM_INTERRUPT: { |
2831 | struct kvm_interrupt irq; | |
2832 | ||
2833 | r = -EFAULT; | |
2834 | if (copy_from_user(&irq, argp, sizeof irq)) | |
2835 | goto out; | |
2836 | r = kvm_vcpu_ioctl_interrupt(vcpu, &irq); | |
2837 | if (r) | |
2838 | goto out; | |
2839 | r = 0; | |
2840 | break; | |
2841 | } | |
c4abb7c9 JK |
2842 | case KVM_NMI: { |
2843 | r = kvm_vcpu_ioctl_nmi(vcpu); | |
2844 | if (r) | |
2845 | goto out; | |
2846 | r = 0; | |
2847 | break; | |
2848 | } | |
313a3dc7 CO |
2849 | case KVM_SET_CPUID: { |
2850 | struct kvm_cpuid __user *cpuid_arg = argp; | |
2851 | struct kvm_cpuid cpuid; | |
2852 | ||
2853 | r = -EFAULT; | |
2854 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
2855 | goto out; | |
2856 | r = kvm_vcpu_ioctl_set_cpuid(vcpu, &cpuid, cpuid_arg->entries); | |
2857 | if (r) | |
2858 | goto out; | |
2859 | break; | |
2860 | } | |
07716717 DK |
2861 | case KVM_SET_CPUID2: { |
2862 | struct kvm_cpuid2 __user *cpuid_arg = argp; | |
2863 | struct kvm_cpuid2 cpuid; | |
2864 | ||
2865 | r = -EFAULT; | |
2866 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
2867 | goto out; | |
2868 | r = kvm_vcpu_ioctl_set_cpuid2(vcpu, &cpuid, | |
19355475 | 2869 | cpuid_arg->entries); |
07716717 DK |
2870 | if (r) |
2871 | goto out; | |
2872 | break; | |
2873 | } | |
2874 | case KVM_GET_CPUID2: { | |
2875 | struct kvm_cpuid2 __user *cpuid_arg = argp; | |
2876 | struct kvm_cpuid2 cpuid; | |
2877 | ||
2878 | r = -EFAULT; | |
2879 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
2880 | goto out; | |
2881 | r = kvm_vcpu_ioctl_get_cpuid2(vcpu, &cpuid, | |
19355475 | 2882 | cpuid_arg->entries); |
07716717 DK |
2883 | if (r) |
2884 | goto out; | |
2885 | r = -EFAULT; | |
2886 | if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid)) | |
2887 | goto out; | |
2888 | r = 0; | |
2889 | break; | |
2890 | } | |
313a3dc7 CO |
2891 | case KVM_GET_MSRS: |
2892 | r = msr_io(vcpu, argp, kvm_get_msr, 1); | |
2893 | break; | |
2894 | case KVM_SET_MSRS: | |
2895 | r = msr_io(vcpu, argp, do_set_msr, 0); | |
2896 | break; | |
b209749f AK |
2897 | case KVM_TPR_ACCESS_REPORTING: { |
2898 | struct kvm_tpr_access_ctl tac; | |
2899 | ||
2900 | r = -EFAULT; | |
2901 | if (copy_from_user(&tac, argp, sizeof tac)) | |
2902 | goto out; | |
2903 | r = vcpu_ioctl_tpr_access_reporting(vcpu, &tac); | |
2904 | if (r) | |
2905 | goto out; | |
2906 | r = -EFAULT; | |
2907 | if (copy_to_user(argp, &tac, sizeof tac)) | |
2908 | goto out; | |
2909 | r = 0; | |
2910 | break; | |
2911 | }; | |
b93463aa AK |
2912 | case KVM_SET_VAPIC_ADDR: { |
2913 | struct kvm_vapic_addr va; | |
2914 | ||
2915 | r = -EINVAL; | |
2916 | if (!irqchip_in_kernel(vcpu->kvm)) | |
2917 | goto out; | |
2918 | r = -EFAULT; | |
2919 | if (copy_from_user(&va, argp, sizeof va)) | |
2920 | goto out; | |
2921 | r = 0; | |
2922 | kvm_lapic_set_vapic_addr(vcpu, va.vapic_addr); | |
2923 | break; | |
2924 | } | |
890ca9ae HY |
2925 | case KVM_X86_SETUP_MCE: { |
2926 | u64 mcg_cap; | |
2927 | ||
2928 | r = -EFAULT; | |
2929 | if (copy_from_user(&mcg_cap, argp, sizeof mcg_cap)) | |
2930 | goto out; | |
2931 | r = kvm_vcpu_ioctl_x86_setup_mce(vcpu, mcg_cap); | |
2932 | break; | |
2933 | } | |
2934 | case KVM_X86_SET_MCE: { | |
2935 | struct kvm_x86_mce mce; | |
2936 | ||
2937 | r = -EFAULT; | |
2938 | if (copy_from_user(&mce, argp, sizeof mce)) | |
2939 | goto out; | |
2940 | r = kvm_vcpu_ioctl_x86_set_mce(vcpu, &mce); | |
2941 | break; | |
2942 | } | |
3cfc3092 JK |
2943 | case KVM_GET_VCPU_EVENTS: { |
2944 | struct kvm_vcpu_events events; | |
2945 | ||
2946 | kvm_vcpu_ioctl_x86_get_vcpu_events(vcpu, &events); | |
2947 | ||
2948 | r = -EFAULT; | |
2949 | if (copy_to_user(argp, &events, sizeof(struct kvm_vcpu_events))) | |
2950 | break; | |
2951 | r = 0; | |
2952 | break; | |
2953 | } | |
2954 | case KVM_SET_VCPU_EVENTS: { | |
2955 | struct kvm_vcpu_events events; | |
2956 | ||
2957 | r = -EFAULT; | |
2958 | if (copy_from_user(&events, argp, sizeof(struct kvm_vcpu_events))) | |
2959 | break; | |
2960 | ||
2961 | r = kvm_vcpu_ioctl_x86_set_vcpu_events(vcpu, &events); | |
2962 | break; | |
2963 | } | |
a1efbe77 JK |
2964 | case KVM_GET_DEBUGREGS: { |
2965 | struct kvm_debugregs dbgregs; | |
2966 | ||
2967 | kvm_vcpu_ioctl_x86_get_debugregs(vcpu, &dbgregs); | |
2968 | ||
2969 | r = -EFAULT; | |
2970 | if (copy_to_user(argp, &dbgregs, | |
2971 | sizeof(struct kvm_debugregs))) | |
2972 | break; | |
2973 | r = 0; | |
2974 | break; | |
2975 | } | |
2976 | case KVM_SET_DEBUGREGS: { | |
2977 | struct kvm_debugregs dbgregs; | |
2978 | ||
2979 | r = -EFAULT; | |
2980 | if (copy_from_user(&dbgregs, argp, | |
2981 | sizeof(struct kvm_debugregs))) | |
2982 | break; | |
2983 | ||
2984 | r = kvm_vcpu_ioctl_x86_set_debugregs(vcpu, &dbgregs); | |
2985 | break; | |
2986 | } | |
2d5b5a66 | 2987 | case KVM_GET_XSAVE: { |
d1ac91d8 | 2988 | u.xsave = kzalloc(sizeof(struct kvm_xsave), GFP_KERNEL); |
2d5b5a66 | 2989 | r = -ENOMEM; |
d1ac91d8 | 2990 | if (!u.xsave) |
2d5b5a66 SY |
2991 | break; |
2992 | ||
d1ac91d8 | 2993 | kvm_vcpu_ioctl_x86_get_xsave(vcpu, u.xsave); |
2d5b5a66 SY |
2994 | |
2995 | r = -EFAULT; | |
d1ac91d8 | 2996 | if (copy_to_user(argp, u.xsave, sizeof(struct kvm_xsave))) |
2d5b5a66 SY |
2997 | break; |
2998 | r = 0; | |
2999 | break; | |
3000 | } | |
3001 | case KVM_SET_XSAVE: { | |
d1ac91d8 | 3002 | u.xsave = kzalloc(sizeof(struct kvm_xsave), GFP_KERNEL); |
2d5b5a66 | 3003 | r = -ENOMEM; |
d1ac91d8 | 3004 | if (!u.xsave) |
2d5b5a66 SY |
3005 | break; |
3006 | ||
3007 | r = -EFAULT; | |
d1ac91d8 | 3008 | if (copy_from_user(u.xsave, argp, sizeof(struct kvm_xsave))) |
2d5b5a66 SY |
3009 | break; |
3010 | ||
d1ac91d8 | 3011 | r = kvm_vcpu_ioctl_x86_set_xsave(vcpu, u.xsave); |
2d5b5a66 SY |
3012 | break; |
3013 | } | |
3014 | case KVM_GET_XCRS: { | |
d1ac91d8 | 3015 | u.xcrs = kzalloc(sizeof(struct kvm_xcrs), GFP_KERNEL); |
2d5b5a66 | 3016 | r = -ENOMEM; |
d1ac91d8 | 3017 | if (!u.xcrs) |
2d5b5a66 SY |
3018 | break; |
3019 | ||
d1ac91d8 | 3020 | kvm_vcpu_ioctl_x86_get_xcrs(vcpu, u.xcrs); |
2d5b5a66 SY |
3021 | |
3022 | r = -EFAULT; | |
d1ac91d8 | 3023 | if (copy_to_user(argp, u.xcrs, |
2d5b5a66 SY |
3024 | sizeof(struct kvm_xcrs))) |
3025 | break; | |
3026 | r = 0; | |
3027 | break; | |
3028 | } | |
3029 | case KVM_SET_XCRS: { | |
d1ac91d8 | 3030 | u.xcrs = kzalloc(sizeof(struct kvm_xcrs), GFP_KERNEL); |
2d5b5a66 | 3031 | r = -ENOMEM; |
d1ac91d8 | 3032 | if (!u.xcrs) |
2d5b5a66 SY |
3033 | break; |
3034 | ||
3035 | r = -EFAULT; | |
d1ac91d8 | 3036 | if (copy_from_user(u.xcrs, argp, |
2d5b5a66 SY |
3037 | sizeof(struct kvm_xcrs))) |
3038 | break; | |
3039 | ||
d1ac91d8 | 3040 | r = kvm_vcpu_ioctl_x86_set_xcrs(vcpu, u.xcrs); |
2d5b5a66 SY |
3041 | break; |
3042 | } | |
313a3dc7 CO |
3043 | default: |
3044 | r = -EINVAL; | |
3045 | } | |
3046 | out: | |
d1ac91d8 | 3047 | kfree(u.buffer); |
313a3dc7 CO |
3048 | return r; |
3049 | } | |
3050 | ||
1fe779f8 CO |
3051 | static int kvm_vm_ioctl_set_tss_addr(struct kvm *kvm, unsigned long addr) |
3052 | { | |
3053 | int ret; | |
3054 | ||
3055 | if (addr > (unsigned int)(-3 * PAGE_SIZE)) | |
3056 | return -1; | |
3057 | ret = kvm_x86_ops->set_tss_addr(kvm, addr); | |
3058 | return ret; | |
3059 | } | |
3060 | ||
b927a3ce SY |
3061 | static int kvm_vm_ioctl_set_identity_map_addr(struct kvm *kvm, |
3062 | u64 ident_addr) | |
3063 | { | |
3064 | kvm->arch.ept_identity_map_addr = ident_addr; | |
3065 | return 0; | |
3066 | } | |
3067 | ||
1fe779f8 CO |
3068 | static int kvm_vm_ioctl_set_nr_mmu_pages(struct kvm *kvm, |
3069 | u32 kvm_nr_mmu_pages) | |
3070 | { | |
3071 | if (kvm_nr_mmu_pages < KVM_MIN_ALLOC_MMU_PAGES) | |
3072 | return -EINVAL; | |
3073 | ||
79fac95e | 3074 | mutex_lock(&kvm->slots_lock); |
7c8a83b7 | 3075 | spin_lock(&kvm->mmu_lock); |
1fe779f8 CO |
3076 | |
3077 | kvm_mmu_change_mmu_pages(kvm, kvm_nr_mmu_pages); | |
f05e70ac | 3078 | kvm->arch.n_requested_mmu_pages = kvm_nr_mmu_pages; |
1fe779f8 | 3079 | |
7c8a83b7 | 3080 | spin_unlock(&kvm->mmu_lock); |
79fac95e | 3081 | mutex_unlock(&kvm->slots_lock); |
1fe779f8 CO |
3082 | return 0; |
3083 | } | |
3084 | ||
3085 | static int kvm_vm_ioctl_get_nr_mmu_pages(struct kvm *kvm) | |
3086 | { | |
39de71ec | 3087 | return kvm->arch.n_max_mmu_pages; |
1fe779f8 CO |
3088 | } |
3089 | ||
1fe779f8 CO |
3090 | static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) |
3091 | { | |
3092 | int r; | |
3093 | ||
3094 | r = 0; | |
3095 | switch (chip->chip_id) { | |
3096 | case KVM_IRQCHIP_PIC_MASTER: | |
3097 | memcpy(&chip->chip.pic, | |
3098 | &pic_irqchip(kvm)->pics[0], | |
3099 | sizeof(struct kvm_pic_state)); | |
3100 | break; | |
3101 | case KVM_IRQCHIP_PIC_SLAVE: | |
3102 | memcpy(&chip->chip.pic, | |
3103 | &pic_irqchip(kvm)->pics[1], | |
3104 | sizeof(struct kvm_pic_state)); | |
3105 | break; | |
3106 | case KVM_IRQCHIP_IOAPIC: | |
eba0226b | 3107 | r = kvm_get_ioapic(kvm, &chip->chip.ioapic); |
1fe779f8 CO |
3108 | break; |
3109 | default: | |
3110 | r = -EINVAL; | |
3111 | break; | |
3112 | } | |
3113 | return r; | |
3114 | } | |
3115 | ||
3116 | static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) | |
3117 | { | |
3118 | int r; | |
3119 | ||
3120 | r = 0; | |
3121 | switch (chip->chip_id) { | |
3122 | case KVM_IRQCHIP_PIC_MASTER: | |
f4f51050 | 3123 | spin_lock(&pic_irqchip(kvm)->lock); |
1fe779f8 CO |
3124 | memcpy(&pic_irqchip(kvm)->pics[0], |
3125 | &chip->chip.pic, | |
3126 | sizeof(struct kvm_pic_state)); | |
f4f51050 | 3127 | spin_unlock(&pic_irqchip(kvm)->lock); |
1fe779f8 CO |
3128 | break; |
3129 | case KVM_IRQCHIP_PIC_SLAVE: | |
f4f51050 | 3130 | spin_lock(&pic_irqchip(kvm)->lock); |
1fe779f8 CO |
3131 | memcpy(&pic_irqchip(kvm)->pics[1], |
3132 | &chip->chip.pic, | |
3133 | sizeof(struct kvm_pic_state)); | |
f4f51050 | 3134 | spin_unlock(&pic_irqchip(kvm)->lock); |
1fe779f8 CO |
3135 | break; |
3136 | case KVM_IRQCHIP_IOAPIC: | |
eba0226b | 3137 | r = kvm_set_ioapic(kvm, &chip->chip.ioapic); |
1fe779f8 CO |
3138 | break; |
3139 | default: | |
3140 | r = -EINVAL; | |
3141 | break; | |
3142 | } | |
3143 | kvm_pic_update_irq(pic_irqchip(kvm)); | |
3144 | return r; | |
3145 | } | |
3146 | ||
e0f63cb9 SY |
3147 | static int kvm_vm_ioctl_get_pit(struct kvm *kvm, struct kvm_pit_state *ps) |
3148 | { | |
3149 | int r = 0; | |
3150 | ||
894a9c55 | 3151 | mutex_lock(&kvm->arch.vpit->pit_state.lock); |
e0f63cb9 | 3152 | memcpy(ps, &kvm->arch.vpit->pit_state, sizeof(struct kvm_pit_state)); |
894a9c55 | 3153 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); |
e0f63cb9 SY |
3154 | return r; |
3155 | } | |
3156 | ||
3157 | static int kvm_vm_ioctl_set_pit(struct kvm *kvm, struct kvm_pit_state *ps) | |
3158 | { | |
3159 | int r = 0; | |
3160 | ||
894a9c55 | 3161 | mutex_lock(&kvm->arch.vpit->pit_state.lock); |
e0f63cb9 | 3162 | memcpy(&kvm->arch.vpit->pit_state, ps, sizeof(struct kvm_pit_state)); |
e9f42757 BK |
3163 | kvm_pit_load_count(kvm, 0, ps->channels[0].count, 0); |
3164 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); | |
3165 | return r; | |
3166 | } | |
3167 | ||
3168 | static int kvm_vm_ioctl_get_pit2(struct kvm *kvm, struct kvm_pit_state2 *ps) | |
3169 | { | |
3170 | int r = 0; | |
3171 | ||
3172 | mutex_lock(&kvm->arch.vpit->pit_state.lock); | |
3173 | memcpy(ps->channels, &kvm->arch.vpit->pit_state.channels, | |
3174 | sizeof(ps->channels)); | |
3175 | ps->flags = kvm->arch.vpit->pit_state.flags; | |
3176 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); | |
97e69aa6 | 3177 | memset(&ps->reserved, 0, sizeof(ps->reserved)); |
e9f42757 BK |
3178 | return r; |
3179 | } | |
3180 | ||
3181 | static int kvm_vm_ioctl_set_pit2(struct kvm *kvm, struct kvm_pit_state2 *ps) | |
3182 | { | |
3183 | int r = 0, start = 0; | |
3184 | u32 prev_legacy, cur_legacy; | |
3185 | mutex_lock(&kvm->arch.vpit->pit_state.lock); | |
3186 | prev_legacy = kvm->arch.vpit->pit_state.flags & KVM_PIT_FLAGS_HPET_LEGACY; | |
3187 | cur_legacy = ps->flags & KVM_PIT_FLAGS_HPET_LEGACY; | |
3188 | if (!prev_legacy && cur_legacy) | |
3189 | start = 1; | |
3190 | memcpy(&kvm->arch.vpit->pit_state.channels, &ps->channels, | |
3191 | sizeof(kvm->arch.vpit->pit_state.channels)); | |
3192 | kvm->arch.vpit->pit_state.flags = ps->flags; | |
3193 | kvm_pit_load_count(kvm, 0, kvm->arch.vpit->pit_state.channels[0].count, start); | |
894a9c55 | 3194 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); |
e0f63cb9 SY |
3195 | return r; |
3196 | } | |
3197 | ||
52d939a0 MT |
3198 | static int kvm_vm_ioctl_reinject(struct kvm *kvm, |
3199 | struct kvm_reinject_control *control) | |
3200 | { | |
3201 | if (!kvm->arch.vpit) | |
3202 | return -ENXIO; | |
894a9c55 | 3203 | mutex_lock(&kvm->arch.vpit->pit_state.lock); |
52d939a0 | 3204 | kvm->arch.vpit->pit_state.pit_timer.reinject = control->pit_reinject; |
894a9c55 | 3205 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); |
52d939a0 MT |
3206 | return 0; |
3207 | } | |
3208 | ||
5bb064dc ZX |
3209 | /* |
3210 | * Get (and clear) the dirty memory log for a memory slot. | |
3211 | */ | |
3212 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, | |
3213 | struct kvm_dirty_log *log) | |
3214 | { | |
87bf6e7d | 3215 | int r, i; |
5bb064dc | 3216 | struct kvm_memory_slot *memslot; |
87bf6e7d | 3217 | unsigned long n; |
b050b015 | 3218 | unsigned long is_dirty = 0; |
5bb064dc | 3219 | |
79fac95e | 3220 | mutex_lock(&kvm->slots_lock); |
5bb064dc | 3221 | |
b050b015 MT |
3222 | r = -EINVAL; |
3223 | if (log->slot >= KVM_MEMORY_SLOTS) | |
3224 | goto out; | |
3225 | ||
3226 | memslot = &kvm->memslots->memslots[log->slot]; | |
3227 | r = -ENOENT; | |
3228 | if (!memslot->dirty_bitmap) | |
3229 | goto out; | |
3230 | ||
87bf6e7d | 3231 | n = kvm_dirty_bitmap_bytes(memslot); |
b050b015 | 3232 | |
b050b015 MT |
3233 | for (i = 0; !is_dirty && i < n/sizeof(long); i++) |
3234 | is_dirty = memslot->dirty_bitmap[i]; | |
5bb064dc ZX |
3235 | |
3236 | /* If nothing is dirty, don't bother messing with page tables. */ | |
3237 | if (is_dirty) { | |
b050b015 | 3238 | struct kvm_memslots *slots, *old_slots; |
914ebccd | 3239 | unsigned long *dirty_bitmap; |
b050b015 | 3240 | |
515a0127 TY |
3241 | dirty_bitmap = memslot->dirty_bitmap_head; |
3242 | if (memslot->dirty_bitmap == dirty_bitmap) | |
3243 | dirty_bitmap += n / sizeof(long); | |
914ebccd | 3244 | memset(dirty_bitmap, 0, n); |
b050b015 | 3245 | |
914ebccd TY |
3246 | r = -ENOMEM; |
3247 | slots = kzalloc(sizeof(struct kvm_memslots), GFP_KERNEL); | |
515a0127 | 3248 | if (!slots) |
914ebccd | 3249 | goto out; |
b050b015 MT |
3250 | memcpy(slots, kvm->memslots, sizeof(struct kvm_memslots)); |
3251 | slots->memslots[log->slot].dirty_bitmap = dirty_bitmap; | |
49c7754c | 3252 | slots->generation++; |
b050b015 MT |
3253 | |
3254 | old_slots = kvm->memslots; | |
3255 | rcu_assign_pointer(kvm->memslots, slots); | |
3256 | synchronize_srcu_expedited(&kvm->srcu); | |
3257 | dirty_bitmap = old_slots->memslots[log->slot].dirty_bitmap; | |
3258 | kfree(old_slots); | |
914ebccd | 3259 | |
edde99ce MT |
3260 | spin_lock(&kvm->mmu_lock); |
3261 | kvm_mmu_slot_remove_write_access(kvm, log->slot); | |
3262 | spin_unlock(&kvm->mmu_lock); | |
3263 | ||
914ebccd | 3264 | r = -EFAULT; |
515a0127 | 3265 | if (copy_to_user(log->dirty_bitmap, dirty_bitmap, n)) |
914ebccd | 3266 | goto out; |
914ebccd TY |
3267 | } else { |
3268 | r = -EFAULT; | |
3269 | if (clear_user(log->dirty_bitmap, n)) | |
3270 | goto out; | |
5bb064dc | 3271 | } |
b050b015 | 3272 | |
5bb064dc ZX |
3273 | r = 0; |
3274 | out: | |
79fac95e | 3275 | mutex_unlock(&kvm->slots_lock); |
5bb064dc ZX |
3276 | return r; |
3277 | } | |
3278 | ||
1fe779f8 CO |
3279 | long kvm_arch_vm_ioctl(struct file *filp, |
3280 | unsigned int ioctl, unsigned long arg) | |
3281 | { | |
3282 | struct kvm *kvm = filp->private_data; | |
3283 | void __user *argp = (void __user *)arg; | |
367e1319 | 3284 | int r = -ENOTTY; |
f0d66275 DH |
3285 | /* |
3286 | * This union makes it completely explicit to gcc-3.x | |
3287 | * that these two variables' stack usage should be | |
3288 | * combined, not added together. | |
3289 | */ | |
3290 | union { | |
3291 | struct kvm_pit_state ps; | |
e9f42757 | 3292 | struct kvm_pit_state2 ps2; |
c5ff41ce | 3293 | struct kvm_pit_config pit_config; |
f0d66275 | 3294 | } u; |
1fe779f8 CO |
3295 | |
3296 | switch (ioctl) { | |
3297 | case KVM_SET_TSS_ADDR: | |
3298 | r = kvm_vm_ioctl_set_tss_addr(kvm, arg); | |
3299 | if (r < 0) | |
3300 | goto out; | |
3301 | break; | |
b927a3ce SY |
3302 | case KVM_SET_IDENTITY_MAP_ADDR: { |
3303 | u64 ident_addr; | |
3304 | ||
3305 | r = -EFAULT; | |
3306 | if (copy_from_user(&ident_addr, argp, sizeof ident_addr)) | |
3307 | goto out; | |
3308 | r = kvm_vm_ioctl_set_identity_map_addr(kvm, ident_addr); | |
3309 | if (r < 0) | |
3310 | goto out; | |
3311 | break; | |
3312 | } | |
1fe779f8 CO |
3313 | case KVM_SET_NR_MMU_PAGES: |
3314 | r = kvm_vm_ioctl_set_nr_mmu_pages(kvm, arg); | |
3315 | if (r) | |
3316 | goto out; | |
3317 | break; | |
3318 | case KVM_GET_NR_MMU_PAGES: | |
3319 | r = kvm_vm_ioctl_get_nr_mmu_pages(kvm); | |
3320 | break; | |
3ddea128 MT |
3321 | case KVM_CREATE_IRQCHIP: { |
3322 | struct kvm_pic *vpic; | |
3323 | ||
3324 | mutex_lock(&kvm->lock); | |
3325 | r = -EEXIST; | |
3326 | if (kvm->arch.vpic) | |
3327 | goto create_irqchip_unlock; | |
1fe779f8 | 3328 | r = -ENOMEM; |
3ddea128 MT |
3329 | vpic = kvm_create_pic(kvm); |
3330 | if (vpic) { | |
1fe779f8 CO |
3331 | r = kvm_ioapic_init(kvm); |
3332 | if (r) { | |
175504cd | 3333 | mutex_lock(&kvm->slots_lock); |
72bb2fcd WY |
3334 | kvm_io_bus_unregister_dev(kvm, KVM_PIO_BUS, |
3335 | &vpic->dev); | |
175504cd | 3336 | mutex_unlock(&kvm->slots_lock); |
3ddea128 MT |
3337 | kfree(vpic); |
3338 | goto create_irqchip_unlock; | |
1fe779f8 CO |
3339 | } |
3340 | } else | |
3ddea128 MT |
3341 | goto create_irqchip_unlock; |
3342 | smp_wmb(); | |
3343 | kvm->arch.vpic = vpic; | |
3344 | smp_wmb(); | |
399ec807 AK |
3345 | r = kvm_setup_default_irq_routing(kvm); |
3346 | if (r) { | |
175504cd | 3347 | mutex_lock(&kvm->slots_lock); |
3ddea128 | 3348 | mutex_lock(&kvm->irq_lock); |
72bb2fcd WY |
3349 | kvm_ioapic_destroy(kvm); |
3350 | kvm_destroy_pic(kvm); | |
3ddea128 | 3351 | mutex_unlock(&kvm->irq_lock); |
175504cd | 3352 | mutex_unlock(&kvm->slots_lock); |
399ec807 | 3353 | } |
3ddea128 MT |
3354 | create_irqchip_unlock: |
3355 | mutex_unlock(&kvm->lock); | |
1fe779f8 | 3356 | break; |
3ddea128 | 3357 | } |
7837699f | 3358 | case KVM_CREATE_PIT: |
c5ff41ce JK |
3359 | u.pit_config.flags = KVM_PIT_SPEAKER_DUMMY; |
3360 | goto create_pit; | |
3361 | case KVM_CREATE_PIT2: | |
3362 | r = -EFAULT; | |
3363 | if (copy_from_user(&u.pit_config, argp, | |
3364 | sizeof(struct kvm_pit_config))) | |
3365 | goto out; | |
3366 | create_pit: | |
79fac95e | 3367 | mutex_lock(&kvm->slots_lock); |
269e05e4 AK |
3368 | r = -EEXIST; |
3369 | if (kvm->arch.vpit) | |
3370 | goto create_pit_unlock; | |
7837699f | 3371 | r = -ENOMEM; |
c5ff41ce | 3372 | kvm->arch.vpit = kvm_create_pit(kvm, u.pit_config.flags); |
7837699f SY |
3373 | if (kvm->arch.vpit) |
3374 | r = 0; | |
269e05e4 | 3375 | create_pit_unlock: |
79fac95e | 3376 | mutex_unlock(&kvm->slots_lock); |
7837699f | 3377 | break; |
4925663a | 3378 | case KVM_IRQ_LINE_STATUS: |
1fe779f8 CO |
3379 | case KVM_IRQ_LINE: { |
3380 | struct kvm_irq_level irq_event; | |
3381 | ||
3382 | r = -EFAULT; | |
3383 | if (copy_from_user(&irq_event, argp, sizeof irq_event)) | |
3384 | goto out; | |
160d2f6c | 3385 | r = -ENXIO; |
1fe779f8 | 3386 | if (irqchip_in_kernel(kvm)) { |
4925663a | 3387 | __s32 status; |
4925663a GN |
3388 | status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID, |
3389 | irq_event.irq, irq_event.level); | |
4925663a | 3390 | if (ioctl == KVM_IRQ_LINE_STATUS) { |
160d2f6c | 3391 | r = -EFAULT; |
4925663a GN |
3392 | irq_event.status = status; |
3393 | if (copy_to_user(argp, &irq_event, | |
3394 | sizeof irq_event)) | |
3395 | goto out; | |
3396 | } | |
1fe779f8 CO |
3397 | r = 0; |
3398 | } | |
3399 | break; | |
3400 | } | |
3401 | case KVM_GET_IRQCHIP: { | |
3402 | /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ | |
f0d66275 | 3403 | struct kvm_irqchip *chip = kmalloc(sizeof(*chip), GFP_KERNEL); |
1fe779f8 | 3404 | |
f0d66275 DH |
3405 | r = -ENOMEM; |
3406 | if (!chip) | |
1fe779f8 | 3407 | goto out; |
f0d66275 DH |
3408 | r = -EFAULT; |
3409 | if (copy_from_user(chip, argp, sizeof *chip)) | |
3410 | goto get_irqchip_out; | |
1fe779f8 CO |
3411 | r = -ENXIO; |
3412 | if (!irqchip_in_kernel(kvm)) | |
f0d66275 DH |
3413 | goto get_irqchip_out; |
3414 | r = kvm_vm_ioctl_get_irqchip(kvm, chip); | |
1fe779f8 | 3415 | if (r) |
f0d66275 | 3416 | goto get_irqchip_out; |
1fe779f8 | 3417 | r = -EFAULT; |
f0d66275 DH |
3418 | if (copy_to_user(argp, chip, sizeof *chip)) |
3419 | goto get_irqchip_out; | |
1fe779f8 | 3420 | r = 0; |
f0d66275 DH |
3421 | get_irqchip_out: |
3422 | kfree(chip); | |
3423 | if (r) | |
3424 | goto out; | |
1fe779f8 CO |
3425 | break; |
3426 | } | |
3427 | case KVM_SET_IRQCHIP: { | |
3428 | /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ | |
f0d66275 | 3429 | struct kvm_irqchip *chip = kmalloc(sizeof(*chip), GFP_KERNEL); |
1fe779f8 | 3430 | |
f0d66275 DH |
3431 | r = -ENOMEM; |
3432 | if (!chip) | |
1fe779f8 | 3433 | goto out; |
f0d66275 DH |
3434 | r = -EFAULT; |
3435 | if (copy_from_user(chip, argp, sizeof *chip)) | |
3436 | goto set_irqchip_out; | |
1fe779f8 CO |
3437 | r = -ENXIO; |
3438 | if (!irqchip_in_kernel(kvm)) | |
f0d66275 DH |
3439 | goto set_irqchip_out; |
3440 | r = kvm_vm_ioctl_set_irqchip(kvm, chip); | |
1fe779f8 | 3441 | if (r) |
f0d66275 | 3442 | goto set_irqchip_out; |
1fe779f8 | 3443 | r = 0; |
f0d66275 DH |
3444 | set_irqchip_out: |
3445 | kfree(chip); | |
3446 | if (r) | |
3447 | goto out; | |
1fe779f8 CO |
3448 | break; |
3449 | } | |
e0f63cb9 | 3450 | case KVM_GET_PIT: { |
e0f63cb9 | 3451 | r = -EFAULT; |
f0d66275 | 3452 | if (copy_from_user(&u.ps, argp, sizeof(struct kvm_pit_state))) |
e0f63cb9 SY |
3453 | goto out; |
3454 | r = -ENXIO; | |
3455 | if (!kvm->arch.vpit) | |
3456 | goto out; | |
f0d66275 | 3457 | r = kvm_vm_ioctl_get_pit(kvm, &u.ps); |
e0f63cb9 SY |
3458 | if (r) |
3459 | goto out; | |
3460 | r = -EFAULT; | |
f0d66275 | 3461 | if (copy_to_user(argp, &u.ps, sizeof(struct kvm_pit_state))) |
e0f63cb9 SY |
3462 | goto out; |
3463 | r = 0; | |
3464 | break; | |
3465 | } | |
3466 | case KVM_SET_PIT: { | |
e0f63cb9 | 3467 | r = -EFAULT; |
f0d66275 | 3468 | if (copy_from_user(&u.ps, argp, sizeof u.ps)) |
e0f63cb9 SY |
3469 | goto out; |
3470 | r = -ENXIO; | |
3471 | if (!kvm->arch.vpit) | |
3472 | goto out; | |
f0d66275 | 3473 | r = kvm_vm_ioctl_set_pit(kvm, &u.ps); |
e0f63cb9 SY |
3474 | if (r) |
3475 | goto out; | |
3476 | r = 0; | |
3477 | break; | |
3478 | } | |
e9f42757 BK |
3479 | case KVM_GET_PIT2: { |
3480 | r = -ENXIO; | |
3481 | if (!kvm->arch.vpit) | |
3482 | goto out; | |
3483 | r = kvm_vm_ioctl_get_pit2(kvm, &u.ps2); | |
3484 | if (r) | |
3485 | goto out; | |
3486 | r = -EFAULT; | |
3487 | if (copy_to_user(argp, &u.ps2, sizeof(u.ps2))) | |
3488 | goto out; | |
3489 | r = 0; | |
3490 | break; | |
3491 | } | |
3492 | case KVM_SET_PIT2: { | |
3493 | r = -EFAULT; | |
3494 | if (copy_from_user(&u.ps2, argp, sizeof(u.ps2))) | |
3495 | goto out; | |
3496 | r = -ENXIO; | |
3497 | if (!kvm->arch.vpit) | |
3498 | goto out; | |
3499 | r = kvm_vm_ioctl_set_pit2(kvm, &u.ps2); | |
3500 | if (r) | |
3501 | goto out; | |
3502 | r = 0; | |
3503 | break; | |
3504 | } | |
52d939a0 MT |
3505 | case KVM_REINJECT_CONTROL: { |
3506 | struct kvm_reinject_control control; | |
3507 | r = -EFAULT; | |
3508 | if (copy_from_user(&control, argp, sizeof(control))) | |
3509 | goto out; | |
3510 | r = kvm_vm_ioctl_reinject(kvm, &control); | |
3511 | if (r) | |
3512 | goto out; | |
3513 | r = 0; | |
3514 | break; | |
3515 | } | |
ffde22ac ES |
3516 | case KVM_XEN_HVM_CONFIG: { |
3517 | r = -EFAULT; | |
3518 | if (copy_from_user(&kvm->arch.xen_hvm_config, argp, | |
3519 | sizeof(struct kvm_xen_hvm_config))) | |
3520 | goto out; | |
3521 | r = -EINVAL; | |
3522 | if (kvm->arch.xen_hvm_config.flags) | |
3523 | goto out; | |
3524 | r = 0; | |
3525 | break; | |
3526 | } | |
afbcf7ab | 3527 | case KVM_SET_CLOCK: { |
afbcf7ab GC |
3528 | struct kvm_clock_data user_ns; |
3529 | u64 now_ns; | |
3530 | s64 delta; | |
3531 | ||
3532 | r = -EFAULT; | |
3533 | if (copy_from_user(&user_ns, argp, sizeof(user_ns))) | |
3534 | goto out; | |
3535 | ||
3536 | r = -EINVAL; | |
3537 | if (user_ns.flags) | |
3538 | goto out; | |
3539 | ||
3540 | r = 0; | |
395c6b0a | 3541 | local_irq_disable(); |
759379dd | 3542 | now_ns = get_kernel_ns(); |
afbcf7ab | 3543 | delta = user_ns.clock - now_ns; |
395c6b0a | 3544 | local_irq_enable(); |
afbcf7ab GC |
3545 | kvm->arch.kvmclock_offset = delta; |
3546 | break; | |
3547 | } | |
3548 | case KVM_GET_CLOCK: { | |
afbcf7ab GC |
3549 | struct kvm_clock_data user_ns; |
3550 | u64 now_ns; | |
3551 | ||
395c6b0a | 3552 | local_irq_disable(); |
759379dd | 3553 | now_ns = get_kernel_ns(); |
afbcf7ab | 3554 | user_ns.clock = kvm->arch.kvmclock_offset + now_ns; |
395c6b0a | 3555 | local_irq_enable(); |
afbcf7ab | 3556 | user_ns.flags = 0; |
97e69aa6 | 3557 | memset(&user_ns.pad, 0, sizeof(user_ns.pad)); |
afbcf7ab GC |
3558 | |
3559 | r = -EFAULT; | |
3560 | if (copy_to_user(argp, &user_ns, sizeof(user_ns))) | |
3561 | goto out; | |
3562 | r = 0; | |
3563 | break; | |
3564 | } | |
3565 | ||
1fe779f8 CO |
3566 | default: |
3567 | ; | |
3568 | } | |
3569 | out: | |
3570 | return r; | |
3571 | } | |
3572 | ||
a16b043c | 3573 | static void kvm_init_msr_list(void) |
043405e1 CO |
3574 | { |
3575 | u32 dummy[2]; | |
3576 | unsigned i, j; | |
3577 | ||
e3267cbb GC |
3578 | /* skip the first msrs in the list. KVM-specific */ |
3579 | for (i = j = KVM_SAVE_MSRS_BEGIN; i < ARRAY_SIZE(msrs_to_save); i++) { | |
043405e1 CO |
3580 | if (rdmsr_safe(msrs_to_save[i], &dummy[0], &dummy[1]) < 0) |
3581 | continue; | |
3582 | if (j < i) | |
3583 | msrs_to_save[j] = msrs_to_save[i]; | |
3584 | j++; | |
3585 | } | |
3586 | num_msrs_to_save = j; | |
3587 | } | |
3588 | ||
bda9020e MT |
3589 | static int vcpu_mmio_write(struct kvm_vcpu *vcpu, gpa_t addr, int len, |
3590 | const void *v) | |
bbd9b64e | 3591 | { |
70252a10 AK |
3592 | int handled = 0; |
3593 | int n; | |
3594 | ||
3595 | do { | |
3596 | n = min(len, 8); | |
3597 | if (!(vcpu->arch.apic && | |
3598 | !kvm_iodevice_write(&vcpu->arch.apic->dev, addr, n, v)) | |
3599 | && kvm_io_bus_write(vcpu->kvm, KVM_MMIO_BUS, addr, n, v)) | |
3600 | break; | |
3601 | handled += n; | |
3602 | addr += n; | |
3603 | len -= n; | |
3604 | v += n; | |
3605 | } while (len); | |
bbd9b64e | 3606 | |
70252a10 | 3607 | return handled; |
bbd9b64e CO |
3608 | } |
3609 | ||
bda9020e | 3610 | static int vcpu_mmio_read(struct kvm_vcpu *vcpu, gpa_t addr, int len, void *v) |
bbd9b64e | 3611 | { |
70252a10 AK |
3612 | int handled = 0; |
3613 | int n; | |
3614 | ||
3615 | do { | |
3616 | n = min(len, 8); | |
3617 | if (!(vcpu->arch.apic && | |
3618 | !kvm_iodevice_read(&vcpu->arch.apic->dev, addr, n, v)) | |
3619 | && kvm_io_bus_read(vcpu->kvm, KVM_MMIO_BUS, addr, n, v)) | |
3620 | break; | |
3621 | trace_kvm_mmio(KVM_TRACE_MMIO_READ, n, addr, *(u64 *)v); | |
3622 | handled += n; | |
3623 | addr += n; | |
3624 | len -= n; | |
3625 | v += n; | |
3626 | } while (len); | |
bbd9b64e | 3627 | |
70252a10 | 3628 | return handled; |
bbd9b64e CO |
3629 | } |
3630 | ||
2dafc6c2 GN |
3631 | static void kvm_set_segment(struct kvm_vcpu *vcpu, |
3632 | struct kvm_segment *var, int seg) | |
3633 | { | |
3634 | kvm_x86_ops->set_segment(vcpu, var, seg); | |
3635 | } | |
3636 | ||
3637 | void kvm_get_segment(struct kvm_vcpu *vcpu, | |
3638 | struct kvm_segment *var, int seg) | |
3639 | { | |
3640 | kvm_x86_ops->get_segment(vcpu, var, seg); | |
3641 | } | |
3642 | ||
c30a358d JR |
3643 | static gpa_t translate_gpa(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access) |
3644 | { | |
3645 | return gpa; | |
3646 | } | |
3647 | ||
02f59dc9 JR |
3648 | static gpa_t translate_nested_gpa(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access) |
3649 | { | |
3650 | gpa_t t_gpa; | |
ab9ae313 | 3651 | struct x86_exception exception; |
02f59dc9 JR |
3652 | |
3653 | BUG_ON(!mmu_is_nested(vcpu)); | |
3654 | ||
3655 | /* NPT walks are always user-walks */ | |
3656 | access |= PFERR_USER_MASK; | |
ab9ae313 | 3657 | t_gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, gpa, access, &exception); |
02f59dc9 JR |
3658 | |
3659 | return t_gpa; | |
3660 | } | |
3661 | ||
ab9ae313 AK |
3662 | gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva, |
3663 | struct x86_exception *exception) | |
1871c602 GN |
3664 | { |
3665 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
ab9ae313 | 3666 | return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception); |
1871c602 GN |
3667 | } |
3668 | ||
ab9ae313 AK |
3669 | gpa_t kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu *vcpu, gva_t gva, |
3670 | struct x86_exception *exception) | |
1871c602 GN |
3671 | { |
3672 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
3673 | access |= PFERR_FETCH_MASK; | |
ab9ae313 | 3674 | return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception); |
1871c602 GN |
3675 | } |
3676 | ||
ab9ae313 AK |
3677 | gpa_t kvm_mmu_gva_to_gpa_write(struct kvm_vcpu *vcpu, gva_t gva, |
3678 | struct x86_exception *exception) | |
1871c602 GN |
3679 | { |
3680 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
3681 | access |= PFERR_WRITE_MASK; | |
ab9ae313 | 3682 | return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception); |
1871c602 GN |
3683 | } |
3684 | ||
3685 | /* uses this to access any guest's mapped memory without checking CPL */ | |
ab9ae313 AK |
3686 | gpa_t kvm_mmu_gva_to_gpa_system(struct kvm_vcpu *vcpu, gva_t gva, |
3687 | struct x86_exception *exception) | |
1871c602 | 3688 | { |
ab9ae313 | 3689 | return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, 0, exception); |
1871c602 GN |
3690 | } |
3691 | ||
3692 | static int kvm_read_guest_virt_helper(gva_t addr, void *val, unsigned int bytes, | |
3693 | struct kvm_vcpu *vcpu, u32 access, | |
bcc55cba | 3694 | struct x86_exception *exception) |
bbd9b64e CO |
3695 | { |
3696 | void *data = val; | |
10589a46 | 3697 | int r = X86EMUL_CONTINUE; |
bbd9b64e CO |
3698 | |
3699 | while (bytes) { | |
14dfe855 | 3700 | gpa_t gpa = vcpu->arch.walk_mmu->gva_to_gpa(vcpu, addr, access, |
ab9ae313 | 3701 | exception); |
bbd9b64e | 3702 | unsigned offset = addr & (PAGE_SIZE-1); |
77c2002e | 3703 | unsigned toread = min(bytes, (unsigned)PAGE_SIZE - offset); |
bbd9b64e CO |
3704 | int ret; |
3705 | ||
bcc55cba | 3706 | if (gpa == UNMAPPED_GVA) |
ab9ae313 | 3707 | return X86EMUL_PROPAGATE_FAULT; |
77c2002e | 3708 | ret = kvm_read_guest(vcpu->kvm, gpa, data, toread); |
10589a46 | 3709 | if (ret < 0) { |
c3cd7ffa | 3710 | r = X86EMUL_IO_NEEDED; |
10589a46 MT |
3711 | goto out; |
3712 | } | |
bbd9b64e | 3713 | |
77c2002e IE |
3714 | bytes -= toread; |
3715 | data += toread; | |
3716 | addr += toread; | |
bbd9b64e | 3717 | } |
10589a46 | 3718 | out: |
10589a46 | 3719 | return r; |
bbd9b64e | 3720 | } |
77c2002e | 3721 | |
1871c602 GN |
3722 | /* used for instruction fetching */ |
3723 | static int kvm_fetch_guest_virt(gva_t addr, void *val, unsigned int bytes, | |
bcc55cba AK |
3724 | struct kvm_vcpu *vcpu, |
3725 | struct x86_exception *exception) | |
1871c602 GN |
3726 | { |
3727 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
3728 | return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, | |
bcc55cba AK |
3729 | access | PFERR_FETCH_MASK, |
3730 | exception); | |
1871c602 GN |
3731 | } |
3732 | ||
3733 | static int kvm_read_guest_virt(gva_t addr, void *val, unsigned int bytes, | |
bcc55cba AK |
3734 | struct kvm_vcpu *vcpu, |
3735 | struct x86_exception *exception) | |
1871c602 GN |
3736 | { |
3737 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
3738 | return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, access, | |
bcc55cba | 3739 | exception); |
1871c602 GN |
3740 | } |
3741 | ||
3742 | static int kvm_read_guest_virt_system(gva_t addr, void *val, unsigned int bytes, | |
bcc55cba AK |
3743 | struct kvm_vcpu *vcpu, |
3744 | struct x86_exception *exception) | |
1871c602 | 3745 | { |
bcc55cba | 3746 | return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, 0, exception); |
1871c602 GN |
3747 | } |
3748 | ||
7972995b | 3749 | static int kvm_write_guest_virt_system(gva_t addr, void *val, |
2dafc6c2 | 3750 | unsigned int bytes, |
7972995b | 3751 | struct kvm_vcpu *vcpu, |
bcc55cba | 3752 | struct x86_exception *exception) |
77c2002e IE |
3753 | { |
3754 | void *data = val; | |
3755 | int r = X86EMUL_CONTINUE; | |
3756 | ||
3757 | while (bytes) { | |
14dfe855 JR |
3758 | gpa_t gpa = vcpu->arch.walk_mmu->gva_to_gpa(vcpu, addr, |
3759 | PFERR_WRITE_MASK, | |
ab9ae313 | 3760 | exception); |
77c2002e IE |
3761 | unsigned offset = addr & (PAGE_SIZE-1); |
3762 | unsigned towrite = min(bytes, (unsigned)PAGE_SIZE - offset); | |
3763 | int ret; | |
3764 | ||
bcc55cba | 3765 | if (gpa == UNMAPPED_GVA) |
ab9ae313 | 3766 | return X86EMUL_PROPAGATE_FAULT; |
77c2002e IE |
3767 | ret = kvm_write_guest(vcpu->kvm, gpa, data, towrite); |
3768 | if (ret < 0) { | |
c3cd7ffa | 3769 | r = X86EMUL_IO_NEEDED; |
77c2002e IE |
3770 | goto out; |
3771 | } | |
3772 | ||
3773 | bytes -= towrite; | |
3774 | data += towrite; | |
3775 | addr += towrite; | |
3776 | } | |
3777 | out: | |
3778 | return r; | |
3779 | } | |
3780 | ||
bbd9b64e CO |
3781 | static int emulator_read_emulated(unsigned long addr, |
3782 | void *val, | |
3783 | unsigned int bytes, | |
bcc55cba | 3784 | struct x86_exception *exception, |
bbd9b64e CO |
3785 | struct kvm_vcpu *vcpu) |
3786 | { | |
bbd9b64e | 3787 | gpa_t gpa; |
70252a10 | 3788 | int handled; |
bbd9b64e CO |
3789 | |
3790 | if (vcpu->mmio_read_completed) { | |
3791 | memcpy(val, vcpu->mmio_data, bytes); | |
aec51dc4 AK |
3792 | trace_kvm_mmio(KVM_TRACE_MMIO_READ, bytes, |
3793 | vcpu->mmio_phys_addr, *(u64 *)val); | |
bbd9b64e CO |
3794 | vcpu->mmio_read_completed = 0; |
3795 | return X86EMUL_CONTINUE; | |
3796 | } | |
3797 | ||
ab9ae313 | 3798 | gpa = kvm_mmu_gva_to_gpa_read(vcpu, addr, exception); |
1871c602 | 3799 | |
8fe681e9 | 3800 | if (gpa == UNMAPPED_GVA) |
1871c602 | 3801 | return X86EMUL_PROPAGATE_FAULT; |
bbd9b64e CO |
3802 | |
3803 | /* For APIC access vmexit */ | |
3804 | if ((gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) | |
3805 | goto mmio; | |
3806 | ||
bcc55cba AK |
3807 | if (kvm_read_guest_virt(addr, val, bytes, vcpu, exception) |
3808 | == X86EMUL_CONTINUE) | |
bbd9b64e | 3809 | return X86EMUL_CONTINUE; |
bbd9b64e CO |
3810 | |
3811 | mmio: | |
3812 | /* | |
3813 | * Is this MMIO handled locally? | |
3814 | */ | |
70252a10 AK |
3815 | handled = vcpu_mmio_read(vcpu, gpa, bytes, val); |
3816 | ||
3817 | if (handled == bytes) | |
bbd9b64e | 3818 | return X86EMUL_CONTINUE; |
70252a10 AK |
3819 | |
3820 | gpa += handled; | |
3821 | bytes -= handled; | |
3822 | val += handled; | |
aec51dc4 AK |
3823 | |
3824 | trace_kvm_mmio(KVM_TRACE_MMIO_READ_UNSATISFIED, bytes, gpa, 0); | |
bbd9b64e CO |
3825 | |
3826 | vcpu->mmio_needed = 1; | |
411c35b7 GN |
3827 | vcpu->run->exit_reason = KVM_EXIT_MMIO; |
3828 | vcpu->run->mmio.phys_addr = vcpu->mmio_phys_addr = gpa; | |
cef4dea0 AK |
3829 | vcpu->mmio_size = bytes; |
3830 | vcpu->run->mmio.len = min(vcpu->mmio_size, 8); | |
411c35b7 | 3831 | vcpu->run->mmio.is_write = vcpu->mmio_is_write = 0; |
cef4dea0 | 3832 | vcpu->mmio_index = 0; |
bbd9b64e | 3833 | |
c3cd7ffa | 3834 | return X86EMUL_IO_NEEDED; |
bbd9b64e CO |
3835 | } |
3836 | ||
3200f405 | 3837 | int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa, |
bcc55cba | 3838 | const void *val, int bytes) |
bbd9b64e CO |
3839 | { |
3840 | int ret; | |
3841 | ||
3842 | ret = kvm_write_guest(vcpu->kvm, gpa, val, bytes); | |
9f811285 | 3843 | if (ret < 0) |
bbd9b64e | 3844 | return 0; |
ad218f85 | 3845 | kvm_mmu_pte_write(vcpu, gpa, val, bytes, 1); |
bbd9b64e CO |
3846 | return 1; |
3847 | } | |
3848 | ||
3849 | static int emulator_write_emulated_onepage(unsigned long addr, | |
3850 | const void *val, | |
3851 | unsigned int bytes, | |
bcc55cba | 3852 | struct x86_exception *exception, |
bbd9b64e CO |
3853 | struct kvm_vcpu *vcpu) |
3854 | { | |
10589a46 | 3855 | gpa_t gpa; |
70252a10 | 3856 | int handled; |
10589a46 | 3857 | |
ab9ae313 | 3858 | gpa = kvm_mmu_gva_to_gpa_write(vcpu, addr, exception); |
bbd9b64e | 3859 | |
8fe681e9 | 3860 | if (gpa == UNMAPPED_GVA) |
bbd9b64e | 3861 | return X86EMUL_PROPAGATE_FAULT; |
bbd9b64e CO |
3862 | |
3863 | /* For APIC access vmexit */ | |
3864 | if ((gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) | |
3865 | goto mmio; | |
3866 | ||
3867 | if (emulator_write_phys(vcpu, gpa, val, bytes)) | |
3868 | return X86EMUL_CONTINUE; | |
3869 | ||
3870 | mmio: | |
aec51dc4 | 3871 | trace_kvm_mmio(KVM_TRACE_MMIO_WRITE, bytes, gpa, *(u64 *)val); |
bbd9b64e CO |
3872 | /* |
3873 | * Is this MMIO handled locally? | |
3874 | */ | |
70252a10 AK |
3875 | handled = vcpu_mmio_write(vcpu, gpa, bytes, val); |
3876 | if (handled == bytes) | |
bbd9b64e | 3877 | return X86EMUL_CONTINUE; |
bbd9b64e | 3878 | |
70252a10 AK |
3879 | gpa += handled; |
3880 | bytes -= handled; | |
3881 | val += handled; | |
3882 | ||
bbd9b64e | 3883 | vcpu->mmio_needed = 1; |
cef4dea0 | 3884 | memcpy(vcpu->mmio_data, val, bytes); |
411c35b7 GN |
3885 | vcpu->run->exit_reason = KVM_EXIT_MMIO; |
3886 | vcpu->run->mmio.phys_addr = vcpu->mmio_phys_addr = gpa; | |
cef4dea0 AK |
3887 | vcpu->mmio_size = bytes; |
3888 | vcpu->run->mmio.len = min(vcpu->mmio_size, 8); | |
411c35b7 | 3889 | vcpu->run->mmio.is_write = vcpu->mmio_is_write = 1; |
cef4dea0 AK |
3890 | memcpy(vcpu->run->mmio.data, vcpu->mmio_data, 8); |
3891 | vcpu->mmio_index = 0; | |
bbd9b64e CO |
3892 | |
3893 | return X86EMUL_CONTINUE; | |
3894 | } | |
3895 | ||
3896 | int emulator_write_emulated(unsigned long addr, | |
8f6abd06 GN |
3897 | const void *val, |
3898 | unsigned int bytes, | |
bcc55cba | 3899 | struct x86_exception *exception, |
8f6abd06 | 3900 | struct kvm_vcpu *vcpu) |
bbd9b64e CO |
3901 | { |
3902 | /* Crossing a page boundary? */ | |
3903 | if (((addr + bytes - 1) ^ addr) & PAGE_MASK) { | |
3904 | int rc, now; | |
3905 | ||
3906 | now = -addr & ~PAGE_MASK; | |
bcc55cba | 3907 | rc = emulator_write_emulated_onepage(addr, val, now, exception, |
8fe681e9 | 3908 | vcpu); |
bbd9b64e CO |
3909 | if (rc != X86EMUL_CONTINUE) |
3910 | return rc; | |
3911 | addr += now; | |
3912 | val += now; | |
3913 | bytes -= now; | |
3914 | } | |
bcc55cba | 3915 | return emulator_write_emulated_onepage(addr, val, bytes, exception, |
8fe681e9 | 3916 | vcpu); |
bbd9b64e | 3917 | } |
bbd9b64e | 3918 | |
daea3e73 AK |
3919 | #define CMPXCHG_TYPE(t, ptr, old, new) \ |
3920 | (cmpxchg((t *)(ptr), *(t *)(old), *(t *)(new)) == *(t *)(old)) | |
3921 | ||
3922 | #ifdef CONFIG_X86_64 | |
3923 | # define CMPXCHG64(ptr, old, new) CMPXCHG_TYPE(u64, ptr, old, new) | |
3924 | #else | |
3925 | # define CMPXCHG64(ptr, old, new) \ | |
9749a6c0 | 3926 | (cmpxchg64((u64 *)(ptr), *(u64 *)(old), *(u64 *)(new)) == *(u64 *)(old)) |
daea3e73 AK |
3927 | #endif |
3928 | ||
bbd9b64e CO |
3929 | static int emulator_cmpxchg_emulated(unsigned long addr, |
3930 | const void *old, | |
3931 | const void *new, | |
3932 | unsigned int bytes, | |
bcc55cba | 3933 | struct x86_exception *exception, |
bbd9b64e CO |
3934 | struct kvm_vcpu *vcpu) |
3935 | { | |
daea3e73 AK |
3936 | gpa_t gpa; |
3937 | struct page *page; | |
3938 | char *kaddr; | |
3939 | bool exchanged; | |
2bacc55c | 3940 | |
daea3e73 AK |
3941 | /* guests cmpxchg8b have to be emulated atomically */ |
3942 | if (bytes > 8 || (bytes & (bytes - 1))) | |
3943 | goto emul_write; | |
10589a46 | 3944 | |
daea3e73 | 3945 | gpa = kvm_mmu_gva_to_gpa_write(vcpu, addr, NULL); |
2bacc55c | 3946 | |
daea3e73 AK |
3947 | if (gpa == UNMAPPED_GVA || |
3948 | (gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) | |
3949 | goto emul_write; | |
2bacc55c | 3950 | |
daea3e73 AK |
3951 | if (((gpa + bytes - 1) & PAGE_MASK) != (gpa & PAGE_MASK)) |
3952 | goto emul_write; | |
72dc67a6 | 3953 | |
daea3e73 | 3954 | page = gfn_to_page(vcpu->kvm, gpa >> PAGE_SHIFT); |
c19b8bd6 WY |
3955 | if (is_error_page(page)) { |
3956 | kvm_release_page_clean(page); | |
3957 | goto emul_write; | |
3958 | } | |
72dc67a6 | 3959 | |
daea3e73 AK |
3960 | kaddr = kmap_atomic(page, KM_USER0); |
3961 | kaddr += offset_in_page(gpa); | |
3962 | switch (bytes) { | |
3963 | case 1: | |
3964 | exchanged = CMPXCHG_TYPE(u8, kaddr, old, new); | |
3965 | break; | |
3966 | case 2: | |
3967 | exchanged = CMPXCHG_TYPE(u16, kaddr, old, new); | |
3968 | break; | |
3969 | case 4: | |
3970 | exchanged = CMPXCHG_TYPE(u32, kaddr, old, new); | |
3971 | break; | |
3972 | case 8: | |
3973 | exchanged = CMPXCHG64(kaddr, old, new); | |
3974 | break; | |
3975 | default: | |
3976 | BUG(); | |
2bacc55c | 3977 | } |
daea3e73 AK |
3978 | kunmap_atomic(kaddr, KM_USER0); |
3979 | kvm_release_page_dirty(page); | |
3980 | ||
3981 | if (!exchanged) | |
3982 | return X86EMUL_CMPXCHG_FAILED; | |
3983 | ||
8f6abd06 GN |
3984 | kvm_mmu_pte_write(vcpu, gpa, new, bytes, 1); |
3985 | ||
3986 | return X86EMUL_CONTINUE; | |
4a5f48f6 | 3987 | |
3200f405 | 3988 | emul_write: |
daea3e73 | 3989 | printk_once(KERN_WARNING "kvm: emulating exchange as write\n"); |
2bacc55c | 3990 | |
bcc55cba | 3991 | return emulator_write_emulated(addr, new, bytes, exception, vcpu); |
bbd9b64e CO |
3992 | } |
3993 | ||
cf8f70bf GN |
3994 | static int kernel_pio(struct kvm_vcpu *vcpu, void *pd) |
3995 | { | |
3996 | /* TODO: String I/O for in kernel device */ | |
3997 | int r; | |
3998 | ||
3999 | if (vcpu->arch.pio.in) | |
4000 | r = kvm_io_bus_read(vcpu->kvm, KVM_PIO_BUS, vcpu->arch.pio.port, | |
4001 | vcpu->arch.pio.size, pd); | |
4002 | else | |
4003 | r = kvm_io_bus_write(vcpu->kvm, KVM_PIO_BUS, | |
4004 | vcpu->arch.pio.port, vcpu->arch.pio.size, | |
4005 | pd); | |
4006 | return r; | |
4007 | } | |
4008 | ||
4009 | ||
4010 | static int emulator_pio_in_emulated(int size, unsigned short port, void *val, | |
4011 | unsigned int count, struct kvm_vcpu *vcpu) | |
4012 | { | |
7972995b | 4013 | if (vcpu->arch.pio.count) |
cf8f70bf GN |
4014 | goto data_avail; |
4015 | ||
61cfab2e | 4016 | trace_kvm_pio(0, port, size, count); |
cf8f70bf GN |
4017 | |
4018 | vcpu->arch.pio.port = port; | |
4019 | vcpu->arch.pio.in = 1; | |
7972995b | 4020 | vcpu->arch.pio.count = count; |
cf8f70bf GN |
4021 | vcpu->arch.pio.size = size; |
4022 | ||
4023 | if (!kernel_pio(vcpu, vcpu->arch.pio_data)) { | |
4024 | data_avail: | |
4025 | memcpy(val, vcpu->arch.pio_data, size * count); | |
7972995b | 4026 | vcpu->arch.pio.count = 0; |
cf8f70bf GN |
4027 | return 1; |
4028 | } | |
4029 | ||
4030 | vcpu->run->exit_reason = KVM_EXIT_IO; | |
4031 | vcpu->run->io.direction = KVM_EXIT_IO_IN; | |
4032 | vcpu->run->io.size = size; | |
4033 | vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE; | |
4034 | vcpu->run->io.count = count; | |
4035 | vcpu->run->io.port = port; | |
4036 | ||
4037 | return 0; | |
4038 | } | |
4039 | ||
4040 | static int emulator_pio_out_emulated(int size, unsigned short port, | |
4041 | const void *val, unsigned int count, | |
4042 | struct kvm_vcpu *vcpu) | |
4043 | { | |
61cfab2e | 4044 | trace_kvm_pio(1, port, size, count); |
cf8f70bf GN |
4045 | |
4046 | vcpu->arch.pio.port = port; | |
4047 | vcpu->arch.pio.in = 0; | |
7972995b | 4048 | vcpu->arch.pio.count = count; |
cf8f70bf GN |
4049 | vcpu->arch.pio.size = size; |
4050 | ||
4051 | memcpy(vcpu->arch.pio_data, val, size * count); | |
4052 | ||
4053 | if (!kernel_pio(vcpu, vcpu->arch.pio_data)) { | |
7972995b | 4054 | vcpu->arch.pio.count = 0; |
cf8f70bf GN |
4055 | return 1; |
4056 | } | |
4057 | ||
4058 | vcpu->run->exit_reason = KVM_EXIT_IO; | |
4059 | vcpu->run->io.direction = KVM_EXIT_IO_OUT; | |
4060 | vcpu->run->io.size = size; | |
4061 | vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE; | |
4062 | vcpu->run->io.count = count; | |
4063 | vcpu->run->io.port = port; | |
4064 | ||
4065 | return 0; | |
4066 | } | |
4067 | ||
bbd9b64e CO |
4068 | static unsigned long get_segment_base(struct kvm_vcpu *vcpu, int seg) |
4069 | { | |
4070 | return kvm_x86_ops->get_segment_base(vcpu, seg); | |
4071 | } | |
4072 | ||
4073 | int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address) | |
4074 | { | |
a7052897 | 4075 | kvm_mmu_invlpg(vcpu, address); |
bbd9b64e CO |
4076 | return X86EMUL_CONTINUE; |
4077 | } | |
4078 | ||
f5f48ee1 SY |
4079 | int kvm_emulate_wbinvd(struct kvm_vcpu *vcpu) |
4080 | { | |
4081 | if (!need_emulate_wbinvd(vcpu)) | |
4082 | return X86EMUL_CONTINUE; | |
4083 | ||
4084 | if (kvm_x86_ops->has_wbinvd_exit()) { | |
2eec7343 JK |
4085 | int cpu = get_cpu(); |
4086 | ||
4087 | cpumask_set_cpu(cpu, vcpu->arch.wbinvd_dirty_mask); | |
f5f48ee1 SY |
4088 | smp_call_function_many(vcpu->arch.wbinvd_dirty_mask, |
4089 | wbinvd_ipi, NULL, 1); | |
2eec7343 | 4090 | put_cpu(); |
f5f48ee1 | 4091 | cpumask_clear(vcpu->arch.wbinvd_dirty_mask); |
2eec7343 JK |
4092 | } else |
4093 | wbinvd(); | |
f5f48ee1 SY |
4094 | return X86EMUL_CONTINUE; |
4095 | } | |
4096 | EXPORT_SYMBOL_GPL(kvm_emulate_wbinvd); | |
4097 | ||
bbd9b64e CO |
4098 | int emulate_clts(struct kvm_vcpu *vcpu) |
4099 | { | |
4d4ec087 | 4100 | kvm_x86_ops->set_cr0(vcpu, kvm_read_cr0_bits(vcpu, ~X86_CR0_TS)); |
6b52d186 | 4101 | kvm_x86_ops->fpu_activate(vcpu); |
bbd9b64e CO |
4102 | return X86EMUL_CONTINUE; |
4103 | } | |
4104 | ||
35aa5375 | 4105 | int emulator_get_dr(int dr, unsigned long *dest, struct kvm_vcpu *vcpu) |
bbd9b64e | 4106 | { |
338dbc97 | 4107 | return _kvm_get_dr(vcpu, dr, dest); |
bbd9b64e CO |
4108 | } |
4109 | ||
35aa5375 | 4110 | int emulator_set_dr(int dr, unsigned long value, struct kvm_vcpu *vcpu) |
bbd9b64e | 4111 | { |
338dbc97 GN |
4112 | |
4113 | return __kvm_set_dr(vcpu, dr, value); | |
bbd9b64e CO |
4114 | } |
4115 | ||
52a46617 | 4116 | static u64 mk_cr_64(u64 curr_cr, u32 new_val) |
5fdbf976 | 4117 | { |
52a46617 | 4118 | return (curr_cr & ~((1ULL << 32) - 1)) | new_val; |
5fdbf976 MT |
4119 | } |
4120 | ||
52a46617 | 4121 | static unsigned long emulator_get_cr(int cr, struct kvm_vcpu *vcpu) |
bbd9b64e | 4122 | { |
52a46617 GN |
4123 | unsigned long value; |
4124 | ||
4125 | switch (cr) { | |
4126 | case 0: | |
4127 | value = kvm_read_cr0(vcpu); | |
4128 | break; | |
4129 | case 2: | |
4130 | value = vcpu->arch.cr2; | |
4131 | break; | |
4132 | case 3: | |
9f8fe504 | 4133 | value = kvm_read_cr3(vcpu); |
52a46617 GN |
4134 | break; |
4135 | case 4: | |
4136 | value = kvm_read_cr4(vcpu); | |
4137 | break; | |
4138 | case 8: | |
4139 | value = kvm_get_cr8(vcpu); | |
4140 | break; | |
4141 | default: | |
4142 | vcpu_printf(vcpu, "%s: unexpected cr %u\n", __func__, cr); | |
4143 | return 0; | |
4144 | } | |
4145 | ||
4146 | return value; | |
4147 | } | |
4148 | ||
0f12244f | 4149 | static int emulator_set_cr(int cr, unsigned long val, struct kvm_vcpu *vcpu) |
52a46617 | 4150 | { |
0f12244f GN |
4151 | int res = 0; |
4152 | ||
52a46617 GN |
4153 | switch (cr) { |
4154 | case 0: | |
49a9b07e | 4155 | res = kvm_set_cr0(vcpu, mk_cr_64(kvm_read_cr0(vcpu), val)); |
52a46617 GN |
4156 | break; |
4157 | case 2: | |
4158 | vcpu->arch.cr2 = val; | |
4159 | break; | |
4160 | case 3: | |
2390218b | 4161 | res = kvm_set_cr3(vcpu, val); |
52a46617 GN |
4162 | break; |
4163 | case 4: | |
a83b29c6 | 4164 | res = kvm_set_cr4(vcpu, mk_cr_64(kvm_read_cr4(vcpu), val)); |
52a46617 GN |
4165 | break; |
4166 | case 8: | |
eea1cff9 | 4167 | res = kvm_set_cr8(vcpu, val); |
52a46617 GN |
4168 | break; |
4169 | default: | |
4170 | vcpu_printf(vcpu, "%s: unexpected cr %u\n", __func__, cr); | |
0f12244f | 4171 | res = -1; |
52a46617 | 4172 | } |
0f12244f GN |
4173 | |
4174 | return res; | |
52a46617 GN |
4175 | } |
4176 | ||
9c537244 GN |
4177 | static int emulator_get_cpl(struct kvm_vcpu *vcpu) |
4178 | { | |
4179 | return kvm_x86_ops->get_cpl(vcpu); | |
4180 | } | |
4181 | ||
2dafc6c2 GN |
4182 | static void emulator_get_gdt(struct desc_ptr *dt, struct kvm_vcpu *vcpu) |
4183 | { | |
4184 | kvm_x86_ops->get_gdt(vcpu, dt); | |
4185 | } | |
4186 | ||
160ce1f1 MG |
4187 | static void emulator_get_idt(struct desc_ptr *dt, struct kvm_vcpu *vcpu) |
4188 | { | |
4189 | kvm_x86_ops->get_idt(vcpu, dt); | |
4190 | } | |
4191 | ||
5951c442 GN |
4192 | static unsigned long emulator_get_cached_segment_base(int seg, |
4193 | struct kvm_vcpu *vcpu) | |
4194 | { | |
4195 | return get_segment_base(vcpu, seg); | |
4196 | } | |
4197 | ||
5601d05b GN |
4198 | static bool emulator_get_cached_descriptor(struct desc_struct *desc, u32 *base3, |
4199 | int seg, struct kvm_vcpu *vcpu) | |
2dafc6c2 GN |
4200 | { |
4201 | struct kvm_segment var; | |
4202 | ||
4203 | kvm_get_segment(vcpu, &var, seg); | |
4204 | ||
4205 | if (var.unusable) | |
4206 | return false; | |
4207 | ||
4208 | if (var.g) | |
4209 | var.limit >>= 12; | |
4210 | set_desc_limit(desc, var.limit); | |
4211 | set_desc_base(desc, (unsigned long)var.base); | |
5601d05b GN |
4212 | #ifdef CONFIG_X86_64 |
4213 | if (base3) | |
4214 | *base3 = var.base >> 32; | |
4215 | #endif | |
2dafc6c2 GN |
4216 | desc->type = var.type; |
4217 | desc->s = var.s; | |
4218 | desc->dpl = var.dpl; | |
4219 | desc->p = var.present; | |
4220 | desc->avl = var.avl; | |
4221 | desc->l = var.l; | |
4222 | desc->d = var.db; | |
4223 | desc->g = var.g; | |
4224 | ||
4225 | return true; | |
4226 | } | |
4227 | ||
5601d05b GN |
4228 | static void emulator_set_cached_descriptor(struct desc_struct *desc, u32 base3, |
4229 | int seg, struct kvm_vcpu *vcpu) | |
2dafc6c2 GN |
4230 | { |
4231 | struct kvm_segment var; | |
4232 | ||
4233 | /* needed to preserve selector */ | |
4234 | kvm_get_segment(vcpu, &var, seg); | |
4235 | ||
4236 | var.base = get_desc_base(desc); | |
5601d05b GN |
4237 | #ifdef CONFIG_X86_64 |
4238 | var.base |= ((u64)base3) << 32; | |
4239 | #endif | |
2dafc6c2 GN |
4240 | var.limit = get_desc_limit(desc); |
4241 | if (desc->g) | |
4242 | var.limit = (var.limit << 12) | 0xfff; | |
4243 | var.type = desc->type; | |
4244 | var.present = desc->p; | |
4245 | var.dpl = desc->dpl; | |
4246 | var.db = desc->d; | |
4247 | var.s = desc->s; | |
4248 | var.l = desc->l; | |
4249 | var.g = desc->g; | |
4250 | var.avl = desc->avl; | |
4251 | var.present = desc->p; | |
4252 | var.unusable = !var.present; | |
4253 | var.padding = 0; | |
4254 | ||
4255 | kvm_set_segment(vcpu, &var, seg); | |
4256 | return; | |
4257 | } | |
4258 | ||
4259 | static u16 emulator_get_segment_selector(int seg, struct kvm_vcpu *vcpu) | |
4260 | { | |
4261 | struct kvm_segment kvm_seg; | |
4262 | ||
4263 | kvm_get_segment(vcpu, &kvm_seg, seg); | |
4264 | return kvm_seg.selector; | |
4265 | } | |
4266 | ||
4267 | static void emulator_set_segment_selector(u16 sel, int seg, | |
4268 | struct kvm_vcpu *vcpu) | |
4269 | { | |
4270 | struct kvm_segment kvm_seg; | |
4271 | ||
4272 | kvm_get_segment(vcpu, &kvm_seg, seg); | |
4273 | kvm_seg.selector = sel; | |
4274 | kvm_set_segment(vcpu, &kvm_seg, seg); | |
4275 | } | |
4276 | ||
5037f6f3 AK |
4277 | static void emulator_get_fpu(struct x86_emulate_ctxt *ctxt) |
4278 | { | |
4279 | preempt_disable(); | |
4280 | kvm_load_guest_fpu(ctxt->vcpu); | |
4281 | /* | |
4282 | * CR0.TS may reference the host fpu state, not the guest fpu state, | |
4283 | * so it may be clear at this point. | |
4284 | */ | |
4285 | clts(); | |
4286 | } | |
4287 | ||
4288 | static void emulator_put_fpu(struct x86_emulate_ctxt *ctxt) | |
4289 | { | |
4290 | preempt_enable(); | |
4291 | } | |
4292 | ||
8a76d7f2 JR |
4293 | static int emulator_intercept(struct kvm_vcpu *vcpu, |
4294 | struct x86_instruction_info *info, | |
c4f035c6 AK |
4295 | enum x86_intercept_stage stage) |
4296 | { | |
8a76d7f2 | 4297 | return kvm_x86_ops->check_intercept(vcpu, info, stage); |
c4f035c6 AK |
4298 | } |
4299 | ||
14af3f3c | 4300 | static struct x86_emulate_ops emulate_ops = { |
1871c602 | 4301 | .read_std = kvm_read_guest_virt_system, |
2dafc6c2 | 4302 | .write_std = kvm_write_guest_virt_system, |
1871c602 | 4303 | .fetch = kvm_fetch_guest_virt, |
bbd9b64e CO |
4304 | .read_emulated = emulator_read_emulated, |
4305 | .write_emulated = emulator_write_emulated, | |
4306 | .cmpxchg_emulated = emulator_cmpxchg_emulated, | |
cf8f70bf GN |
4307 | .pio_in_emulated = emulator_pio_in_emulated, |
4308 | .pio_out_emulated = emulator_pio_out_emulated, | |
2dafc6c2 GN |
4309 | .get_cached_descriptor = emulator_get_cached_descriptor, |
4310 | .set_cached_descriptor = emulator_set_cached_descriptor, | |
4311 | .get_segment_selector = emulator_get_segment_selector, | |
4312 | .set_segment_selector = emulator_set_segment_selector, | |
5951c442 | 4313 | .get_cached_segment_base = emulator_get_cached_segment_base, |
2dafc6c2 | 4314 | .get_gdt = emulator_get_gdt, |
160ce1f1 | 4315 | .get_idt = emulator_get_idt, |
52a46617 GN |
4316 | .get_cr = emulator_get_cr, |
4317 | .set_cr = emulator_set_cr, | |
9c537244 | 4318 | .cpl = emulator_get_cpl, |
35aa5375 GN |
4319 | .get_dr = emulator_get_dr, |
4320 | .set_dr = emulator_set_dr, | |
3fb1b5db GN |
4321 | .set_msr = kvm_set_msr, |
4322 | .get_msr = kvm_get_msr, | |
5037f6f3 AK |
4323 | .get_fpu = emulator_get_fpu, |
4324 | .put_fpu = emulator_put_fpu, | |
c4f035c6 | 4325 | .intercept = emulator_intercept, |
bbd9b64e CO |
4326 | }; |
4327 | ||
5fdbf976 MT |
4328 | static void cache_all_regs(struct kvm_vcpu *vcpu) |
4329 | { | |
4330 | kvm_register_read(vcpu, VCPU_REGS_RAX); | |
4331 | kvm_register_read(vcpu, VCPU_REGS_RSP); | |
4332 | kvm_register_read(vcpu, VCPU_REGS_RIP); | |
4333 | vcpu->arch.regs_dirty = ~0; | |
4334 | } | |
4335 | ||
95cb2295 GN |
4336 | static void toggle_interruptibility(struct kvm_vcpu *vcpu, u32 mask) |
4337 | { | |
4338 | u32 int_shadow = kvm_x86_ops->get_interrupt_shadow(vcpu, mask); | |
4339 | /* | |
4340 | * an sti; sti; sequence only disable interrupts for the first | |
4341 | * instruction. So, if the last instruction, be it emulated or | |
4342 | * not, left the system with the INT_STI flag enabled, it | |
4343 | * means that the last instruction is an sti. We should not | |
4344 | * leave the flag on in this case. The same goes for mov ss | |
4345 | */ | |
4346 | if (!(int_shadow & mask)) | |
4347 | kvm_x86_ops->set_interrupt_shadow(vcpu, mask); | |
4348 | } | |
4349 | ||
54b8486f GN |
4350 | static void inject_emulated_exception(struct kvm_vcpu *vcpu) |
4351 | { | |
4352 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; | |
da9cb575 | 4353 | if (ctxt->exception.vector == PF_VECTOR) |
6389ee94 | 4354 | kvm_propagate_fault(vcpu, &ctxt->exception); |
da9cb575 AK |
4355 | else if (ctxt->exception.error_code_valid) |
4356 | kvm_queue_exception_e(vcpu, ctxt->exception.vector, | |
4357 | ctxt->exception.error_code); | |
54b8486f | 4358 | else |
da9cb575 | 4359 | kvm_queue_exception(vcpu, ctxt->exception.vector); |
54b8486f GN |
4360 | } |
4361 | ||
8ec4722d MG |
4362 | static void init_emulate_ctxt(struct kvm_vcpu *vcpu) |
4363 | { | |
4364 | struct decode_cache *c = &vcpu->arch.emulate_ctxt.decode; | |
4365 | int cs_db, cs_l; | |
4366 | ||
4367 | cache_all_regs(vcpu); | |
4368 | ||
4369 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); | |
4370 | ||
4371 | vcpu->arch.emulate_ctxt.vcpu = vcpu; | |
f6e78475 | 4372 | vcpu->arch.emulate_ctxt.eflags = kvm_get_rflags(vcpu); |
8ec4722d MG |
4373 | vcpu->arch.emulate_ctxt.eip = kvm_rip_read(vcpu); |
4374 | vcpu->arch.emulate_ctxt.mode = | |
4375 | (!is_protmode(vcpu)) ? X86EMUL_MODE_REAL : | |
4376 | (vcpu->arch.emulate_ctxt.eflags & X86_EFLAGS_VM) | |
4377 | ? X86EMUL_MODE_VM86 : cs_l | |
4378 | ? X86EMUL_MODE_PROT64 : cs_db | |
4379 | ? X86EMUL_MODE_PROT32 : X86EMUL_MODE_PROT16; | |
c4f035c6 | 4380 | vcpu->arch.emulate_ctxt.guest_mode = is_guest_mode(vcpu); |
8ec4722d MG |
4381 | memset(c, 0, sizeof(struct decode_cache)); |
4382 | memcpy(c->regs, vcpu->arch.regs, sizeof c->regs); | |
4383 | } | |
4384 | ||
63995653 MG |
4385 | int kvm_inject_realmode_interrupt(struct kvm_vcpu *vcpu, int irq) |
4386 | { | |
4387 | struct decode_cache *c = &vcpu->arch.emulate_ctxt.decode; | |
4388 | int ret; | |
4389 | ||
4390 | init_emulate_ctxt(vcpu); | |
4391 | ||
4392 | vcpu->arch.emulate_ctxt.decode.op_bytes = 2; | |
4393 | vcpu->arch.emulate_ctxt.decode.ad_bytes = 2; | |
4394 | vcpu->arch.emulate_ctxt.decode.eip = vcpu->arch.emulate_ctxt.eip; | |
4395 | ret = emulate_int_real(&vcpu->arch.emulate_ctxt, &emulate_ops, irq); | |
4396 | ||
4397 | if (ret != X86EMUL_CONTINUE) | |
4398 | return EMULATE_FAIL; | |
4399 | ||
4400 | vcpu->arch.emulate_ctxt.eip = c->eip; | |
4401 | memcpy(vcpu->arch.regs, c->regs, sizeof c->regs); | |
4402 | kvm_rip_write(vcpu, vcpu->arch.emulate_ctxt.eip); | |
f6e78475 | 4403 | kvm_set_rflags(vcpu, vcpu->arch.emulate_ctxt.eflags); |
63995653 MG |
4404 | |
4405 | if (irq == NMI_VECTOR) | |
4406 | vcpu->arch.nmi_pending = false; | |
4407 | else | |
4408 | vcpu->arch.interrupt.pending = false; | |
4409 | ||
4410 | return EMULATE_DONE; | |
4411 | } | |
4412 | EXPORT_SYMBOL_GPL(kvm_inject_realmode_interrupt); | |
4413 | ||
6d77dbfc GN |
4414 | static int handle_emulation_failure(struct kvm_vcpu *vcpu) |
4415 | { | |
fc3a9157 JR |
4416 | int r = EMULATE_DONE; |
4417 | ||
6d77dbfc GN |
4418 | ++vcpu->stat.insn_emulation_fail; |
4419 | trace_kvm_emulate_insn_failed(vcpu); | |
fc3a9157 JR |
4420 | if (!is_guest_mode(vcpu)) { |
4421 | vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR; | |
4422 | vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION; | |
4423 | vcpu->run->internal.ndata = 0; | |
4424 | r = EMULATE_FAIL; | |
4425 | } | |
6d77dbfc | 4426 | kvm_queue_exception(vcpu, UD_VECTOR); |
fc3a9157 JR |
4427 | |
4428 | return r; | |
6d77dbfc GN |
4429 | } |
4430 | ||
a6f177ef GN |
4431 | static bool reexecute_instruction(struct kvm_vcpu *vcpu, gva_t gva) |
4432 | { | |
4433 | gpa_t gpa; | |
4434 | ||
68be0803 GN |
4435 | if (tdp_enabled) |
4436 | return false; | |
4437 | ||
a6f177ef GN |
4438 | /* |
4439 | * if emulation was due to access to shadowed page table | |
4440 | * and it failed try to unshadow page and re-entetr the | |
4441 | * guest to let CPU execute the instruction. | |
4442 | */ | |
4443 | if (kvm_mmu_unprotect_page_virt(vcpu, gva)) | |
4444 | return true; | |
4445 | ||
4446 | gpa = kvm_mmu_gva_to_gpa_system(vcpu, gva, NULL); | |
4447 | ||
4448 | if (gpa == UNMAPPED_GVA) | |
4449 | return true; /* let cpu generate fault */ | |
4450 | ||
4451 | if (!kvm_is_error_hva(gfn_to_hva(vcpu->kvm, gpa >> PAGE_SHIFT))) | |
4452 | return true; | |
4453 | ||
4454 | return false; | |
4455 | } | |
4456 | ||
51d8b661 AP |
4457 | int x86_emulate_instruction(struct kvm_vcpu *vcpu, |
4458 | unsigned long cr2, | |
dc25e89e AP |
4459 | int emulation_type, |
4460 | void *insn, | |
4461 | int insn_len) | |
bbd9b64e | 4462 | { |
95cb2295 | 4463 | int r; |
4d2179e1 | 4464 | struct decode_cache *c = &vcpu->arch.emulate_ctxt.decode; |
bbd9b64e | 4465 | |
26eef70c | 4466 | kvm_clear_exception_queue(vcpu); |
ad312c7c | 4467 | vcpu->arch.mmio_fault_cr2 = cr2; |
5fdbf976 | 4468 | /* |
56e82318 | 4469 | * TODO: fix emulate.c to use guest_read/write_register |
5fdbf976 MT |
4470 | * instead of direct ->regs accesses, can save hundred cycles |
4471 | * on Intel for instructions that don't read/change RSP, for | |
4472 | * for example. | |
4473 | */ | |
4474 | cache_all_regs(vcpu); | |
bbd9b64e | 4475 | |
571008da | 4476 | if (!(emulation_type & EMULTYPE_NO_DECODE)) { |
8ec4722d | 4477 | init_emulate_ctxt(vcpu); |
95cb2295 | 4478 | vcpu->arch.emulate_ctxt.interruptibility = 0; |
da9cb575 | 4479 | vcpu->arch.emulate_ctxt.have_exception = false; |
4fc40f07 | 4480 | vcpu->arch.emulate_ctxt.perm_ok = false; |
bbd9b64e | 4481 | |
4005996e AK |
4482 | vcpu->arch.emulate_ctxt.only_vendor_specific_insn |
4483 | = emulation_type & EMULTYPE_TRAP_UD; | |
4484 | ||
dc25e89e | 4485 | r = x86_decode_insn(&vcpu->arch.emulate_ctxt, insn, insn_len); |
bbd9b64e | 4486 | |
e46479f8 | 4487 | trace_kvm_emulate_insn_start(vcpu); |
f2b5756b | 4488 | ++vcpu->stat.insn_emulation; |
bbd9b64e | 4489 | if (r) { |
4005996e AK |
4490 | if (emulation_type & EMULTYPE_TRAP_UD) |
4491 | return EMULATE_FAIL; | |
a6f177ef | 4492 | if (reexecute_instruction(vcpu, cr2)) |
bbd9b64e | 4493 | return EMULATE_DONE; |
6d77dbfc GN |
4494 | if (emulation_type & EMULTYPE_SKIP) |
4495 | return EMULATE_FAIL; | |
4496 | return handle_emulation_failure(vcpu); | |
bbd9b64e CO |
4497 | } |
4498 | } | |
4499 | ||
ba8afb6b GN |
4500 | if (emulation_type & EMULTYPE_SKIP) { |
4501 | kvm_rip_write(vcpu, vcpu->arch.emulate_ctxt.decode.eip); | |
4502 | return EMULATE_DONE; | |
4503 | } | |
4504 | ||
4d2179e1 GN |
4505 | /* this is needed for vmware backdor interface to work since it |
4506 | changes registers values during IO operation */ | |
4507 | memcpy(c->regs, vcpu->arch.regs, sizeof c->regs); | |
4508 | ||
5cd21917 | 4509 | restart: |
9aabc88f | 4510 | r = x86_emulate_insn(&vcpu->arch.emulate_ctxt); |
bbd9b64e | 4511 | |
775fde86 JR |
4512 | if (r == EMULATION_INTERCEPTED) |
4513 | return EMULATE_DONE; | |
4514 | ||
d2ddd1c4 | 4515 | if (r == EMULATION_FAILED) { |
a6f177ef | 4516 | if (reexecute_instruction(vcpu, cr2)) |
c3cd7ffa GN |
4517 | return EMULATE_DONE; |
4518 | ||
6d77dbfc | 4519 | return handle_emulation_failure(vcpu); |
bbd9b64e CO |
4520 | } |
4521 | ||
da9cb575 | 4522 | if (vcpu->arch.emulate_ctxt.have_exception) { |
54b8486f | 4523 | inject_emulated_exception(vcpu); |
d2ddd1c4 GN |
4524 | r = EMULATE_DONE; |
4525 | } else if (vcpu->arch.pio.count) { | |
3457e419 GN |
4526 | if (!vcpu->arch.pio.in) |
4527 | vcpu->arch.pio.count = 0; | |
e85d28f8 | 4528 | r = EMULATE_DO_MMIO; |
cef4dea0 | 4529 | } else if (vcpu->mmio_needed) |
e85d28f8 | 4530 | r = EMULATE_DO_MMIO; |
cef4dea0 | 4531 | else if (r == EMULATION_RESTART) |
5cd21917 | 4532 | goto restart; |
d2ddd1c4 GN |
4533 | else |
4534 | r = EMULATE_DONE; | |
f850e2e6 | 4535 | |
e85d28f8 | 4536 | toggle_interruptibility(vcpu, vcpu->arch.emulate_ctxt.interruptibility); |
f6e78475 | 4537 | kvm_set_rflags(vcpu, vcpu->arch.emulate_ctxt.eflags); |
3842d135 | 4538 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
e85d28f8 GN |
4539 | memcpy(vcpu->arch.regs, c->regs, sizeof c->regs); |
4540 | kvm_rip_write(vcpu, vcpu->arch.emulate_ctxt.eip); | |
4541 | ||
4542 | return r; | |
de7d789a | 4543 | } |
51d8b661 | 4544 | EXPORT_SYMBOL_GPL(x86_emulate_instruction); |
de7d789a | 4545 | |
cf8f70bf | 4546 | int kvm_fast_pio_out(struct kvm_vcpu *vcpu, int size, unsigned short port) |
de7d789a | 4547 | { |
cf8f70bf GN |
4548 | unsigned long val = kvm_register_read(vcpu, VCPU_REGS_RAX); |
4549 | int ret = emulator_pio_out_emulated(size, port, &val, 1, vcpu); | |
4550 | /* do not return to emulator after return from userspace */ | |
7972995b | 4551 | vcpu->arch.pio.count = 0; |
de7d789a CO |
4552 | return ret; |
4553 | } | |
cf8f70bf | 4554 | EXPORT_SYMBOL_GPL(kvm_fast_pio_out); |
de7d789a | 4555 | |
8cfdc000 ZA |
4556 | static void tsc_bad(void *info) |
4557 | { | |
0a3aee0d | 4558 | __this_cpu_write(cpu_tsc_khz, 0); |
8cfdc000 ZA |
4559 | } |
4560 | ||
4561 | static void tsc_khz_changed(void *data) | |
c8076604 | 4562 | { |
8cfdc000 ZA |
4563 | struct cpufreq_freqs *freq = data; |
4564 | unsigned long khz = 0; | |
4565 | ||
4566 | if (data) | |
4567 | khz = freq->new; | |
4568 | else if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) | |
4569 | khz = cpufreq_quick_get(raw_smp_processor_id()); | |
4570 | if (!khz) | |
4571 | khz = tsc_khz; | |
0a3aee0d | 4572 | __this_cpu_write(cpu_tsc_khz, khz); |
c8076604 GH |
4573 | } |
4574 | ||
c8076604 GH |
4575 | static int kvmclock_cpufreq_notifier(struct notifier_block *nb, unsigned long val, |
4576 | void *data) | |
4577 | { | |
4578 | struct cpufreq_freqs *freq = data; | |
4579 | struct kvm *kvm; | |
4580 | struct kvm_vcpu *vcpu; | |
4581 | int i, send_ipi = 0; | |
4582 | ||
8cfdc000 ZA |
4583 | /* |
4584 | * We allow guests to temporarily run on slowing clocks, | |
4585 | * provided we notify them after, or to run on accelerating | |
4586 | * clocks, provided we notify them before. Thus time never | |
4587 | * goes backwards. | |
4588 | * | |
4589 | * However, we have a problem. We can't atomically update | |
4590 | * the frequency of a given CPU from this function; it is | |
4591 | * merely a notifier, which can be called from any CPU. | |
4592 | * Changing the TSC frequency at arbitrary points in time | |
4593 | * requires a recomputation of local variables related to | |
4594 | * the TSC for each VCPU. We must flag these local variables | |
4595 | * to be updated and be sure the update takes place with the | |
4596 | * new frequency before any guests proceed. | |
4597 | * | |
4598 | * Unfortunately, the combination of hotplug CPU and frequency | |
4599 | * change creates an intractable locking scenario; the order | |
4600 | * of when these callouts happen is undefined with respect to | |
4601 | * CPU hotplug, and they can race with each other. As such, | |
4602 | * merely setting per_cpu(cpu_tsc_khz) = X during a hotadd is | |
4603 | * undefined; you can actually have a CPU frequency change take | |
4604 | * place in between the computation of X and the setting of the | |
4605 | * variable. To protect against this problem, all updates of | |
4606 | * the per_cpu tsc_khz variable are done in an interrupt | |
4607 | * protected IPI, and all callers wishing to update the value | |
4608 | * must wait for a synchronous IPI to complete (which is trivial | |
4609 | * if the caller is on the CPU already). This establishes the | |
4610 | * necessary total order on variable updates. | |
4611 | * | |
4612 | * Note that because a guest time update may take place | |
4613 | * anytime after the setting of the VCPU's request bit, the | |
4614 | * correct TSC value must be set before the request. However, | |
4615 | * to ensure the update actually makes it to any guest which | |
4616 | * starts running in hardware virtualization between the set | |
4617 | * and the acquisition of the spinlock, we must also ping the | |
4618 | * CPU after setting the request bit. | |
4619 | * | |
4620 | */ | |
4621 | ||
c8076604 GH |
4622 | if (val == CPUFREQ_PRECHANGE && freq->old > freq->new) |
4623 | return 0; | |
4624 | if (val == CPUFREQ_POSTCHANGE && freq->old < freq->new) | |
4625 | return 0; | |
8cfdc000 ZA |
4626 | |
4627 | smp_call_function_single(freq->cpu, tsc_khz_changed, freq, 1); | |
c8076604 | 4628 | |
e935b837 | 4629 | raw_spin_lock(&kvm_lock); |
c8076604 | 4630 | list_for_each_entry(kvm, &vm_list, vm_list) { |
988a2cae | 4631 | kvm_for_each_vcpu(i, vcpu, kvm) { |
c8076604 GH |
4632 | if (vcpu->cpu != freq->cpu) |
4633 | continue; | |
c285545f | 4634 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
c8076604 | 4635 | if (vcpu->cpu != smp_processor_id()) |
8cfdc000 | 4636 | send_ipi = 1; |
c8076604 GH |
4637 | } |
4638 | } | |
e935b837 | 4639 | raw_spin_unlock(&kvm_lock); |
c8076604 GH |
4640 | |
4641 | if (freq->old < freq->new && send_ipi) { | |
4642 | /* | |
4643 | * We upscale the frequency. Must make the guest | |
4644 | * doesn't see old kvmclock values while running with | |
4645 | * the new frequency, otherwise we risk the guest sees | |
4646 | * time go backwards. | |
4647 | * | |
4648 | * In case we update the frequency for another cpu | |
4649 | * (which might be in guest context) send an interrupt | |
4650 | * to kick the cpu out of guest context. Next time | |
4651 | * guest context is entered kvmclock will be updated, | |
4652 | * so the guest will not see stale values. | |
4653 | */ | |
8cfdc000 | 4654 | smp_call_function_single(freq->cpu, tsc_khz_changed, freq, 1); |
c8076604 GH |
4655 | } |
4656 | return 0; | |
4657 | } | |
4658 | ||
4659 | static struct notifier_block kvmclock_cpufreq_notifier_block = { | |
8cfdc000 ZA |
4660 | .notifier_call = kvmclock_cpufreq_notifier |
4661 | }; | |
4662 | ||
4663 | static int kvmclock_cpu_notifier(struct notifier_block *nfb, | |
4664 | unsigned long action, void *hcpu) | |
4665 | { | |
4666 | unsigned int cpu = (unsigned long)hcpu; | |
4667 | ||
4668 | switch (action) { | |
4669 | case CPU_ONLINE: | |
4670 | case CPU_DOWN_FAILED: | |
4671 | smp_call_function_single(cpu, tsc_khz_changed, NULL, 1); | |
4672 | break; | |
4673 | case CPU_DOWN_PREPARE: | |
4674 | smp_call_function_single(cpu, tsc_bad, NULL, 1); | |
4675 | break; | |
4676 | } | |
4677 | return NOTIFY_OK; | |
4678 | } | |
4679 | ||
4680 | static struct notifier_block kvmclock_cpu_notifier_block = { | |
4681 | .notifier_call = kvmclock_cpu_notifier, | |
4682 | .priority = -INT_MAX | |
c8076604 GH |
4683 | }; |
4684 | ||
b820cc0c ZA |
4685 | static void kvm_timer_init(void) |
4686 | { | |
4687 | int cpu; | |
4688 | ||
c285545f | 4689 | max_tsc_khz = tsc_khz; |
8cfdc000 | 4690 | register_hotcpu_notifier(&kvmclock_cpu_notifier_block); |
b820cc0c | 4691 | if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) { |
c285545f ZA |
4692 | #ifdef CONFIG_CPU_FREQ |
4693 | struct cpufreq_policy policy; | |
4694 | memset(&policy, 0, sizeof(policy)); | |
3e26f230 AK |
4695 | cpu = get_cpu(); |
4696 | cpufreq_get_policy(&policy, cpu); | |
c285545f ZA |
4697 | if (policy.cpuinfo.max_freq) |
4698 | max_tsc_khz = policy.cpuinfo.max_freq; | |
3e26f230 | 4699 | put_cpu(); |
c285545f | 4700 | #endif |
b820cc0c ZA |
4701 | cpufreq_register_notifier(&kvmclock_cpufreq_notifier_block, |
4702 | CPUFREQ_TRANSITION_NOTIFIER); | |
4703 | } | |
c285545f | 4704 | pr_debug("kvm: max_tsc_khz = %ld\n", max_tsc_khz); |
8cfdc000 ZA |
4705 | for_each_online_cpu(cpu) |
4706 | smp_call_function_single(cpu, tsc_khz_changed, NULL, 1); | |
b820cc0c ZA |
4707 | } |
4708 | ||
ff9d07a0 ZY |
4709 | static DEFINE_PER_CPU(struct kvm_vcpu *, current_vcpu); |
4710 | ||
4711 | static int kvm_is_in_guest(void) | |
4712 | { | |
4713 | return percpu_read(current_vcpu) != NULL; | |
4714 | } | |
4715 | ||
4716 | static int kvm_is_user_mode(void) | |
4717 | { | |
4718 | int user_mode = 3; | |
dcf46b94 | 4719 | |
ff9d07a0 ZY |
4720 | if (percpu_read(current_vcpu)) |
4721 | user_mode = kvm_x86_ops->get_cpl(percpu_read(current_vcpu)); | |
dcf46b94 | 4722 | |
ff9d07a0 ZY |
4723 | return user_mode != 0; |
4724 | } | |
4725 | ||
4726 | static unsigned long kvm_get_guest_ip(void) | |
4727 | { | |
4728 | unsigned long ip = 0; | |
dcf46b94 | 4729 | |
ff9d07a0 ZY |
4730 | if (percpu_read(current_vcpu)) |
4731 | ip = kvm_rip_read(percpu_read(current_vcpu)); | |
dcf46b94 | 4732 | |
ff9d07a0 ZY |
4733 | return ip; |
4734 | } | |
4735 | ||
4736 | static struct perf_guest_info_callbacks kvm_guest_cbs = { | |
4737 | .is_in_guest = kvm_is_in_guest, | |
4738 | .is_user_mode = kvm_is_user_mode, | |
4739 | .get_guest_ip = kvm_get_guest_ip, | |
4740 | }; | |
4741 | ||
4742 | void kvm_before_handle_nmi(struct kvm_vcpu *vcpu) | |
4743 | { | |
4744 | percpu_write(current_vcpu, vcpu); | |
4745 | } | |
4746 | EXPORT_SYMBOL_GPL(kvm_before_handle_nmi); | |
4747 | ||
4748 | void kvm_after_handle_nmi(struct kvm_vcpu *vcpu) | |
4749 | { | |
4750 | percpu_write(current_vcpu, NULL); | |
4751 | } | |
4752 | EXPORT_SYMBOL_GPL(kvm_after_handle_nmi); | |
4753 | ||
f8c16bba | 4754 | int kvm_arch_init(void *opaque) |
043405e1 | 4755 | { |
b820cc0c | 4756 | int r; |
f8c16bba ZX |
4757 | struct kvm_x86_ops *ops = (struct kvm_x86_ops *)opaque; |
4758 | ||
f8c16bba ZX |
4759 | if (kvm_x86_ops) { |
4760 | printk(KERN_ERR "kvm: already loaded the other module\n"); | |
56c6d28a ZX |
4761 | r = -EEXIST; |
4762 | goto out; | |
f8c16bba ZX |
4763 | } |
4764 | ||
4765 | if (!ops->cpu_has_kvm_support()) { | |
4766 | printk(KERN_ERR "kvm: no hardware support\n"); | |
56c6d28a ZX |
4767 | r = -EOPNOTSUPP; |
4768 | goto out; | |
f8c16bba ZX |
4769 | } |
4770 | if (ops->disabled_by_bios()) { | |
4771 | printk(KERN_ERR "kvm: disabled by bios\n"); | |
56c6d28a ZX |
4772 | r = -EOPNOTSUPP; |
4773 | goto out; | |
f8c16bba ZX |
4774 | } |
4775 | ||
97db56ce AK |
4776 | r = kvm_mmu_module_init(); |
4777 | if (r) | |
4778 | goto out; | |
4779 | ||
4780 | kvm_init_msr_list(); | |
4781 | ||
f8c16bba | 4782 | kvm_x86_ops = ops; |
56c6d28a | 4783 | kvm_mmu_set_nonpresent_ptes(0ull, 0ull); |
7b52345e | 4784 | kvm_mmu_set_mask_ptes(PT_USER_MASK, PT_ACCESSED_MASK, |
4b12f0de | 4785 | PT_DIRTY_MASK, PT64_NX_MASK, 0); |
c8076604 | 4786 | |
b820cc0c | 4787 | kvm_timer_init(); |
c8076604 | 4788 | |
ff9d07a0 ZY |
4789 | perf_register_guest_info_callbacks(&kvm_guest_cbs); |
4790 | ||
2acf923e DC |
4791 | if (cpu_has_xsave) |
4792 | host_xcr0 = xgetbv(XCR_XFEATURE_ENABLED_MASK); | |
4793 | ||
f8c16bba | 4794 | return 0; |
56c6d28a ZX |
4795 | |
4796 | out: | |
56c6d28a | 4797 | return r; |
043405e1 | 4798 | } |
8776e519 | 4799 | |
f8c16bba ZX |
4800 | void kvm_arch_exit(void) |
4801 | { | |
ff9d07a0 ZY |
4802 | perf_unregister_guest_info_callbacks(&kvm_guest_cbs); |
4803 | ||
888d256e JK |
4804 | if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) |
4805 | cpufreq_unregister_notifier(&kvmclock_cpufreq_notifier_block, | |
4806 | CPUFREQ_TRANSITION_NOTIFIER); | |
8cfdc000 | 4807 | unregister_hotcpu_notifier(&kvmclock_cpu_notifier_block); |
f8c16bba | 4808 | kvm_x86_ops = NULL; |
56c6d28a ZX |
4809 | kvm_mmu_module_exit(); |
4810 | } | |
f8c16bba | 4811 | |
8776e519 HB |
4812 | int kvm_emulate_halt(struct kvm_vcpu *vcpu) |
4813 | { | |
4814 | ++vcpu->stat.halt_exits; | |
4815 | if (irqchip_in_kernel(vcpu->kvm)) { | |
a4535290 | 4816 | vcpu->arch.mp_state = KVM_MP_STATE_HALTED; |
8776e519 HB |
4817 | return 1; |
4818 | } else { | |
4819 | vcpu->run->exit_reason = KVM_EXIT_HLT; | |
4820 | return 0; | |
4821 | } | |
4822 | } | |
4823 | EXPORT_SYMBOL_GPL(kvm_emulate_halt); | |
4824 | ||
2f333bcb MT |
4825 | static inline gpa_t hc_gpa(struct kvm_vcpu *vcpu, unsigned long a0, |
4826 | unsigned long a1) | |
4827 | { | |
4828 | if (is_long_mode(vcpu)) | |
4829 | return a0; | |
4830 | else | |
4831 | return a0 | ((gpa_t)a1 << 32); | |
4832 | } | |
4833 | ||
55cd8e5a GN |
4834 | int kvm_hv_hypercall(struct kvm_vcpu *vcpu) |
4835 | { | |
4836 | u64 param, ingpa, outgpa, ret; | |
4837 | uint16_t code, rep_idx, rep_cnt, res = HV_STATUS_SUCCESS, rep_done = 0; | |
4838 | bool fast, longmode; | |
4839 | int cs_db, cs_l; | |
4840 | ||
4841 | /* | |
4842 | * hypercall generates UD from non zero cpl and real mode | |
4843 | * per HYPER-V spec | |
4844 | */ | |
3eeb3288 | 4845 | if (kvm_x86_ops->get_cpl(vcpu) != 0 || !is_protmode(vcpu)) { |
55cd8e5a GN |
4846 | kvm_queue_exception(vcpu, UD_VECTOR); |
4847 | return 0; | |
4848 | } | |
4849 | ||
4850 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); | |
4851 | longmode = is_long_mode(vcpu) && cs_l == 1; | |
4852 | ||
4853 | if (!longmode) { | |
ccd46936 GN |
4854 | param = ((u64)kvm_register_read(vcpu, VCPU_REGS_RDX) << 32) | |
4855 | (kvm_register_read(vcpu, VCPU_REGS_RAX) & 0xffffffff); | |
4856 | ingpa = ((u64)kvm_register_read(vcpu, VCPU_REGS_RBX) << 32) | | |
4857 | (kvm_register_read(vcpu, VCPU_REGS_RCX) & 0xffffffff); | |
4858 | outgpa = ((u64)kvm_register_read(vcpu, VCPU_REGS_RDI) << 32) | | |
4859 | (kvm_register_read(vcpu, VCPU_REGS_RSI) & 0xffffffff); | |
55cd8e5a GN |
4860 | } |
4861 | #ifdef CONFIG_X86_64 | |
4862 | else { | |
4863 | param = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
4864 | ingpa = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
4865 | outgpa = kvm_register_read(vcpu, VCPU_REGS_R8); | |
4866 | } | |
4867 | #endif | |
4868 | ||
4869 | code = param & 0xffff; | |
4870 | fast = (param >> 16) & 0x1; | |
4871 | rep_cnt = (param >> 32) & 0xfff; | |
4872 | rep_idx = (param >> 48) & 0xfff; | |
4873 | ||
4874 | trace_kvm_hv_hypercall(code, fast, rep_cnt, rep_idx, ingpa, outgpa); | |
4875 | ||
c25bc163 GN |
4876 | switch (code) { |
4877 | case HV_X64_HV_NOTIFY_LONG_SPIN_WAIT: | |
4878 | kvm_vcpu_on_spin(vcpu); | |
4879 | break; | |
4880 | default: | |
4881 | res = HV_STATUS_INVALID_HYPERCALL_CODE; | |
4882 | break; | |
4883 | } | |
55cd8e5a GN |
4884 | |
4885 | ret = res | (((u64)rep_done & 0xfff) << 32); | |
4886 | if (longmode) { | |
4887 | kvm_register_write(vcpu, VCPU_REGS_RAX, ret); | |
4888 | } else { | |
4889 | kvm_register_write(vcpu, VCPU_REGS_RDX, ret >> 32); | |
4890 | kvm_register_write(vcpu, VCPU_REGS_RAX, ret & 0xffffffff); | |
4891 | } | |
4892 | ||
4893 | return 1; | |
4894 | } | |
4895 | ||
8776e519 HB |
4896 | int kvm_emulate_hypercall(struct kvm_vcpu *vcpu) |
4897 | { | |
4898 | unsigned long nr, a0, a1, a2, a3, ret; | |
2f333bcb | 4899 | int r = 1; |
8776e519 | 4900 | |
55cd8e5a GN |
4901 | if (kvm_hv_hypercall_enabled(vcpu->kvm)) |
4902 | return kvm_hv_hypercall(vcpu); | |
4903 | ||
5fdbf976 MT |
4904 | nr = kvm_register_read(vcpu, VCPU_REGS_RAX); |
4905 | a0 = kvm_register_read(vcpu, VCPU_REGS_RBX); | |
4906 | a1 = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
4907 | a2 = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
4908 | a3 = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
8776e519 | 4909 | |
229456fc | 4910 | trace_kvm_hypercall(nr, a0, a1, a2, a3); |
2714d1d3 | 4911 | |
8776e519 HB |
4912 | if (!is_long_mode(vcpu)) { |
4913 | nr &= 0xFFFFFFFF; | |
4914 | a0 &= 0xFFFFFFFF; | |
4915 | a1 &= 0xFFFFFFFF; | |
4916 | a2 &= 0xFFFFFFFF; | |
4917 | a3 &= 0xFFFFFFFF; | |
4918 | } | |
4919 | ||
07708c4a JK |
4920 | if (kvm_x86_ops->get_cpl(vcpu) != 0) { |
4921 | ret = -KVM_EPERM; | |
4922 | goto out; | |
4923 | } | |
4924 | ||
8776e519 | 4925 | switch (nr) { |
b93463aa AK |
4926 | case KVM_HC_VAPIC_POLL_IRQ: |
4927 | ret = 0; | |
4928 | break; | |
2f333bcb MT |
4929 | case KVM_HC_MMU_OP: |
4930 | r = kvm_pv_mmu_op(vcpu, a0, hc_gpa(vcpu, a1, a2), &ret); | |
4931 | break; | |
8776e519 HB |
4932 | default: |
4933 | ret = -KVM_ENOSYS; | |
4934 | break; | |
4935 | } | |
07708c4a | 4936 | out: |
5fdbf976 | 4937 | kvm_register_write(vcpu, VCPU_REGS_RAX, ret); |
f11c3a8d | 4938 | ++vcpu->stat.hypercalls; |
2f333bcb | 4939 | return r; |
8776e519 HB |
4940 | } |
4941 | EXPORT_SYMBOL_GPL(kvm_emulate_hypercall); | |
4942 | ||
4943 | int kvm_fix_hypercall(struct kvm_vcpu *vcpu) | |
4944 | { | |
4945 | char instruction[3]; | |
5fdbf976 | 4946 | unsigned long rip = kvm_rip_read(vcpu); |
8776e519 | 4947 | |
8776e519 HB |
4948 | /* |
4949 | * Blow out the MMU to ensure that no other VCPU has an active mapping | |
4950 | * to ensure that the updated hypercall appears atomically across all | |
4951 | * VCPUs. | |
4952 | */ | |
4953 | kvm_mmu_zap_all(vcpu->kvm); | |
4954 | ||
8776e519 | 4955 | kvm_x86_ops->patch_hypercall(vcpu, instruction); |
8776e519 | 4956 | |
8fe681e9 | 4957 | return emulator_write_emulated(rip, instruction, 3, NULL, vcpu); |
8776e519 HB |
4958 | } |
4959 | ||
8776e519 HB |
4960 | void realmode_lgdt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base) |
4961 | { | |
89a27f4d | 4962 | struct desc_ptr dt = { limit, base }; |
8776e519 HB |
4963 | |
4964 | kvm_x86_ops->set_gdt(vcpu, &dt); | |
4965 | } | |
4966 | ||
4967 | void realmode_lidt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base) | |
4968 | { | |
89a27f4d | 4969 | struct desc_ptr dt = { limit, base }; |
8776e519 HB |
4970 | |
4971 | kvm_x86_ops->set_idt(vcpu, &dt); | |
4972 | } | |
4973 | ||
07716717 DK |
4974 | static int move_to_next_stateful_cpuid_entry(struct kvm_vcpu *vcpu, int i) |
4975 | { | |
ad312c7c ZX |
4976 | struct kvm_cpuid_entry2 *e = &vcpu->arch.cpuid_entries[i]; |
4977 | int j, nent = vcpu->arch.cpuid_nent; | |
07716717 DK |
4978 | |
4979 | e->flags &= ~KVM_CPUID_FLAG_STATE_READ_NEXT; | |
4980 | /* when no next entry is found, the current entry[i] is reselected */ | |
0fdf8e59 | 4981 | for (j = i + 1; ; j = (j + 1) % nent) { |
ad312c7c | 4982 | struct kvm_cpuid_entry2 *ej = &vcpu->arch.cpuid_entries[j]; |
07716717 DK |
4983 | if (ej->function == e->function) { |
4984 | ej->flags |= KVM_CPUID_FLAG_STATE_READ_NEXT; | |
4985 | return j; | |
4986 | } | |
4987 | } | |
4988 | return 0; /* silence gcc, even though control never reaches here */ | |
4989 | } | |
4990 | ||
4991 | /* find an entry with matching function, matching index (if needed), and that | |
4992 | * should be read next (if it's stateful) */ | |
4993 | static int is_matching_cpuid_entry(struct kvm_cpuid_entry2 *e, | |
4994 | u32 function, u32 index) | |
4995 | { | |
4996 | if (e->function != function) | |
4997 | return 0; | |
4998 | if ((e->flags & KVM_CPUID_FLAG_SIGNIFCANT_INDEX) && e->index != index) | |
4999 | return 0; | |
5000 | if ((e->flags & KVM_CPUID_FLAG_STATEFUL_FUNC) && | |
19355475 | 5001 | !(e->flags & KVM_CPUID_FLAG_STATE_READ_NEXT)) |
07716717 DK |
5002 | return 0; |
5003 | return 1; | |
5004 | } | |
5005 | ||
d8017474 AG |
5006 | struct kvm_cpuid_entry2 *kvm_find_cpuid_entry(struct kvm_vcpu *vcpu, |
5007 | u32 function, u32 index) | |
8776e519 HB |
5008 | { |
5009 | int i; | |
d8017474 | 5010 | struct kvm_cpuid_entry2 *best = NULL; |
8776e519 | 5011 | |
ad312c7c | 5012 | for (i = 0; i < vcpu->arch.cpuid_nent; ++i) { |
d8017474 AG |
5013 | struct kvm_cpuid_entry2 *e; |
5014 | ||
ad312c7c | 5015 | e = &vcpu->arch.cpuid_entries[i]; |
07716717 DK |
5016 | if (is_matching_cpuid_entry(e, function, index)) { |
5017 | if (e->flags & KVM_CPUID_FLAG_STATEFUL_FUNC) | |
5018 | move_to_next_stateful_cpuid_entry(vcpu, i); | |
8776e519 HB |
5019 | best = e; |
5020 | break; | |
5021 | } | |
8776e519 | 5022 | } |
d8017474 AG |
5023 | return best; |
5024 | } | |
0e851880 | 5025 | EXPORT_SYMBOL_GPL(kvm_find_cpuid_entry); |
d8017474 | 5026 | |
82725b20 DE |
5027 | int cpuid_maxphyaddr(struct kvm_vcpu *vcpu) |
5028 | { | |
5029 | struct kvm_cpuid_entry2 *best; | |
5030 | ||
f7a71197 AK |
5031 | best = kvm_find_cpuid_entry(vcpu, 0x80000000, 0); |
5032 | if (!best || best->eax < 0x80000008) | |
5033 | goto not_found; | |
82725b20 DE |
5034 | best = kvm_find_cpuid_entry(vcpu, 0x80000008, 0); |
5035 | if (best) | |
5036 | return best->eax & 0xff; | |
f7a71197 | 5037 | not_found: |
82725b20 DE |
5038 | return 36; |
5039 | } | |
5040 | ||
bd22f5cf AP |
5041 | /* |
5042 | * If no match is found, check whether we exceed the vCPU's limit | |
5043 | * and return the content of the highest valid _standard_ leaf instead. | |
5044 | * This is to satisfy the CPUID specification. | |
5045 | */ | |
5046 | static struct kvm_cpuid_entry2* check_cpuid_limit(struct kvm_vcpu *vcpu, | |
5047 | u32 function, u32 index) | |
5048 | { | |
5049 | struct kvm_cpuid_entry2 *maxlevel; | |
5050 | ||
5051 | maxlevel = kvm_find_cpuid_entry(vcpu, function & 0x80000000, 0); | |
5052 | if (!maxlevel || maxlevel->eax >= function) | |
5053 | return NULL; | |
5054 | if (function & 0x80000000) { | |
5055 | maxlevel = kvm_find_cpuid_entry(vcpu, 0, 0); | |
5056 | if (!maxlevel) | |
5057 | return NULL; | |
5058 | } | |
5059 | return kvm_find_cpuid_entry(vcpu, maxlevel->eax, index); | |
5060 | } | |
5061 | ||
d8017474 AG |
5062 | void kvm_emulate_cpuid(struct kvm_vcpu *vcpu) |
5063 | { | |
5064 | u32 function, index; | |
5065 | struct kvm_cpuid_entry2 *best; | |
5066 | ||
5067 | function = kvm_register_read(vcpu, VCPU_REGS_RAX); | |
5068 | index = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
5069 | kvm_register_write(vcpu, VCPU_REGS_RAX, 0); | |
5070 | kvm_register_write(vcpu, VCPU_REGS_RBX, 0); | |
5071 | kvm_register_write(vcpu, VCPU_REGS_RCX, 0); | |
5072 | kvm_register_write(vcpu, VCPU_REGS_RDX, 0); | |
5073 | best = kvm_find_cpuid_entry(vcpu, function, index); | |
bd22f5cf AP |
5074 | |
5075 | if (!best) | |
5076 | best = check_cpuid_limit(vcpu, function, index); | |
5077 | ||
8776e519 | 5078 | if (best) { |
5fdbf976 MT |
5079 | kvm_register_write(vcpu, VCPU_REGS_RAX, best->eax); |
5080 | kvm_register_write(vcpu, VCPU_REGS_RBX, best->ebx); | |
5081 | kvm_register_write(vcpu, VCPU_REGS_RCX, best->ecx); | |
5082 | kvm_register_write(vcpu, VCPU_REGS_RDX, best->edx); | |
8776e519 | 5083 | } |
8776e519 | 5084 | kvm_x86_ops->skip_emulated_instruction(vcpu); |
229456fc MT |
5085 | trace_kvm_cpuid(function, |
5086 | kvm_register_read(vcpu, VCPU_REGS_RAX), | |
5087 | kvm_register_read(vcpu, VCPU_REGS_RBX), | |
5088 | kvm_register_read(vcpu, VCPU_REGS_RCX), | |
5089 | kvm_register_read(vcpu, VCPU_REGS_RDX)); | |
8776e519 HB |
5090 | } |
5091 | EXPORT_SYMBOL_GPL(kvm_emulate_cpuid); | |
d0752060 | 5092 | |
b6c7a5dc HB |
5093 | /* |
5094 | * Check if userspace requested an interrupt window, and that the | |
5095 | * interrupt window is open. | |
5096 | * | |
5097 | * No need to exit to userspace if we already have an interrupt queued. | |
5098 | */ | |
851ba692 | 5099 | static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu) |
b6c7a5dc | 5100 | { |
8061823a | 5101 | return (!irqchip_in_kernel(vcpu->kvm) && !kvm_cpu_has_interrupt(vcpu) && |
851ba692 | 5102 | vcpu->run->request_interrupt_window && |
5df56646 | 5103 | kvm_arch_interrupt_allowed(vcpu)); |
b6c7a5dc HB |
5104 | } |
5105 | ||
851ba692 | 5106 | static void post_kvm_run_save(struct kvm_vcpu *vcpu) |
b6c7a5dc | 5107 | { |
851ba692 AK |
5108 | struct kvm_run *kvm_run = vcpu->run; |
5109 | ||
91586a3b | 5110 | kvm_run->if_flag = (kvm_get_rflags(vcpu) & X86_EFLAGS_IF) != 0; |
2d3ad1f4 | 5111 | kvm_run->cr8 = kvm_get_cr8(vcpu); |
b6c7a5dc | 5112 | kvm_run->apic_base = kvm_get_apic_base(vcpu); |
4531220b | 5113 | if (irqchip_in_kernel(vcpu->kvm)) |
b6c7a5dc | 5114 | kvm_run->ready_for_interrupt_injection = 1; |
4531220b | 5115 | else |
b6c7a5dc | 5116 | kvm_run->ready_for_interrupt_injection = |
fa9726b0 GN |
5117 | kvm_arch_interrupt_allowed(vcpu) && |
5118 | !kvm_cpu_has_interrupt(vcpu) && | |
5119 | !kvm_event_needs_reinjection(vcpu); | |
b6c7a5dc HB |
5120 | } |
5121 | ||
b93463aa AK |
5122 | static void vapic_enter(struct kvm_vcpu *vcpu) |
5123 | { | |
5124 | struct kvm_lapic *apic = vcpu->arch.apic; | |
5125 | struct page *page; | |
5126 | ||
5127 | if (!apic || !apic->vapic_addr) | |
5128 | return; | |
5129 | ||
5130 | page = gfn_to_page(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT); | |
72dc67a6 IE |
5131 | |
5132 | vcpu->arch.apic->vapic_page = page; | |
b93463aa AK |
5133 | } |
5134 | ||
5135 | static void vapic_exit(struct kvm_vcpu *vcpu) | |
5136 | { | |
5137 | struct kvm_lapic *apic = vcpu->arch.apic; | |
f656ce01 | 5138 | int idx; |
b93463aa AK |
5139 | |
5140 | if (!apic || !apic->vapic_addr) | |
5141 | return; | |
5142 | ||
f656ce01 | 5143 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
b93463aa AK |
5144 | kvm_release_page_dirty(apic->vapic_page); |
5145 | mark_page_dirty(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT); | |
f656ce01 | 5146 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
b93463aa AK |
5147 | } |
5148 | ||
95ba8273 GN |
5149 | static void update_cr8_intercept(struct kvm_vcpu *vcpu) |
5150 | { | |
5151 | int max_irr, tpr; | |
5152 | ||
5153 | if (!kvm_x86_ops->update_cr8_intercept) | |
5154 | return; | |
5155 | ||
88c808fd AK |
5156 | if (!vcpu->arch.apic) |
5157 | return; | |
5158 | ||
8db3baa2 GN |
5159 | if (!vcpu->arch.apic->vapic_addr) |
5160 | max_irr = kvm_lapic_find_highest_irr(vcpu); | |
5161 | else | |
5162 | max_irr = -1; | |
95ba8273 GN |
5163 | |
5164 | if (max_irr != -1) | |
5165 | max_irr >>= 4; | |
5166 | ||
5167 | tpr = kvm_lapic_get_cr8(vcpu); | |
5168 | ||
5169 | kvm_x86_ops->update_cr8_intercept(vcpu, tpr, max_irr); | |
5170 | } | |
5171 | ||
851ba692 | 5172 | static void inject_pending_event(struct kvm_vcpu *vcpu) |
95ba8273 GN |
5173 | { |
5174 | /* try to reinject previous events if any */ | |
b59bb7bd | 5175 | if (vcpu->arch.exception.pending) { |
5c1c85d0 AK |
5176 | trace_kvm_inj_exception(vcpu->arch.exception.nr, |
5177 | vcpu->arch.exception.has_error_code, | |
5178 | vcpu->arch.exception.error_code); | |
b59bb7bd GN |
5179 | kvm_x86_ops->queue_exception(vcpu, vcpu->arch.exception.nr, |
5180 | vcpu->arch.exception.has_error_code, | |
ce7ddec4 JR |
5181 | vcpu->arch.exception.error_code, |
5182 | vcpu->arch.exception.reinject); | |
b59bb7bd GN |
5183 | return; |
5184 | } | |
5185 | ||
95ba8273 GN |
5186 | if (vcpu->arch.nmi_injected) { |
5187 | kvm_x86_ops->set_nmi(vcpu); | |
5188 | return; | |
5189 | } | |
5190 | ||
5191 | if (vcpu->arch.interrupt.pending) { | |
66fd3f7f | 5192 | kvm_x86_ops->set_irq(vcpu); |
95ba8273 GN |
5193 | return; |
5194 | } | |
5195 | ||
5196 | /* try to inject new event if pending */ | |
5197 | if (vcpu->arch.nmi_pending) { | |
5198 | if (kvm_x86_ops->nmi_allowed(vcpu)) { | |
5199 | vcpu->arch.nmi_pending = false; | |
5200 | vcpu->arch.nmi_injected = true; | |
5201 | kvm_x86_ops->set_nmi(vcpu); | |
5202 | } | |
5203 | } else if (kvm_cpu_has_interrupt(vcpu)) { | |
5204 | if (kvm_x86_ops->interrupt_allowed(vcpu)) { | |
66fd3f7f GN |
5205 | kvm_queue_interrupt(vcpu, kvm_cpu_get_interrupt(vcpu), |
5206 | false); | |
5207 | kvm_x86_ops->set_irq(vcpu); | |
95ba8273 GN |
5208 | } |
5209 | } | |
5210 | } | |
5211 | ||
2acf923e DC |
5212 | static void kvm_load_guest_xcr0(struct kvm_vcpu *vcpu) |
5213 | { | |
5214 | if (kvm_read_cr4_bits(vcpu, X86_CR4_OSXSAVE) && | |
5215 | !vcpu->guest_xcr0_loaded) { | |
5216 | /* kvm_set_xcr() also depends on this */ | |
5217 | xsetbv(XCR_XFEATURE_ENABLED_MASK, vcpu->arch.xcr0); | |
5218 | vcpu->guest_xcr0_loaded = 1; | |
5219 | } | |
5220 | } | |
5221 | ||
5222 | static void kvm_put_guest_xcr0(struct kvm_vcpu *vcpu) | |
5223 | { | |
5224 | if (vcpu->guest_xcr0_loaded) { | |
5225 | if (vcpu->arch.xcr0 != host_xcr0) | |
5226 | xsetbv(XCR_XFEATURE_ENABLED_MASK, host_xcr0); | |
5227 | vcpu->guest_xcr0_loaded = 0; | |
5228 | } | |
5229 | } | |
5230 | ||
851ba692 | 5231 | static int vcpu_enter_guest(struct kvm_vcpu *vcpu) |
b6c7a5dc HB |
5232 | { |
5233 | int r; | |
1499e54a | 5234 | bool nmi_pending; |
6a8b1d13 | 5235 | bool req_int_win = !irqchip_in_kernel(vcpu->kvm) && |
851ba692 | 5236 | vcpu->run->request_interrupt_window; |
b6c7a5dc | 5237 | |
3e007509 | 5238 | if (vcpu->requests) { |
a8eeb04a | 5239 | if (kvm_check_request(KVM_REQ_MMU_RELOAD, vcpu)) |
2e53d63a | 5240 | kvm_mmu_unload(vcpu); |
a8eeb04a | 5241 | if (kvm_check_request(KVM_REQ_MIGRATE_TIMER, vcpu)) |
2f599714 | 5242 | __kvm_migrate_timers(vcpu); |
34c238a1 ZA |
5243 | if (kvm_check_request(KVM_REQ_CLOCK_UPDATE, vcpu)) { |
5244 | r = kvm_guest_time_update(vcpu); | |
8cfdc000 ZA |
5245 | if (unlikely(r)) |
5246 | goto out; | |
5247 | } | |
a8eeb04a | 5248 | if (kvm_check_request(KVM_REQ_MMU_SYNC, vcpu)) |
4731d4c7 | 5249 | kvm_mmu_sync_roots(vcpu); |
a8eeb04a | 5250 | if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu)) |
d4acf7e7 | 5251 | kvm_x86_ops->tlb_flush(vcpu); |
a8eeb04a | 5252 | if (kvm_check_request(KVM_REQ_REPORT_TPR_ACCESS, vcpu)) { |
851ba692 | 5253 | vcpu->run->exit_reason = KVM_EXIT_TPR_ACCESS; |
b93463aa AK |
5254 | r = 0; |
5255 | goto out; | |
5256 | } | |
a8eeb04a | 5257 | if (kvm_check_request(KVM_REQ_TRIPLE_FAULT, vcpu)) { |
851ba692 | 5258 | vcpu->run->exit_reason = KVM_EXIT_SHUTDOWN; |
71c4dfaf JR |
5259 | r = 0; |
5260 | goto out; | |
5261 | } | |
a8eeb04a | 5262 | if (kvm_check_request(KVM_REQ_DEACTIVATE_FPU, vcpu)) { |
02daab21 AK |
5263 | vcpu->fpu_active = 0; |
5264 | kvm_x86_ops->fpu_deactivate(vcpu); | |
5265 | } | |
af585b92 GN |
5266 | if (kvm_check_request(KVM_REQ_APF_HALT, vcpu)) { |
5267 | /* Page is swapped out. Do synthetic halt */ | |
5268 | vcpu->arch.apf.halted = true; | |
5269 | r = 1; | |
5270 | goto out; | |
5271 | } | |
2f52d58c | 5272 | } |
b93463aa | 5273 | |
3e007509 AK |
5274 | r = kvm_mmu_reload(vcpu); |
5275 | if (unlikely(r)) | |
5276 | goto out; | |
5277 | ||
1499e54a GN |
5278 | /* |
5279 | * An NMI can be injected between local nmi_pending read and | |
5280 | * vcpu->arch.nmi_pending read inside inject_pending_event(). | |
5281 | * But in that case, KVM_REQ_EVENT will be set, which makes | |
5282 | * the race described above benign. | |
5283 | */ | |
5284 | nmi_pending = ACCESS_ONCE(vcpu->arch.nmi_pending); | |
5285 | ||
b463a6f7 AK |
5286 | if (kvm_check_request(KVM_REQ_EVENT, vcpu) || req_int_win) { |
5287 | inject_pending_event(vcpu); | |
5288 | ||
5289 | /* enable NMI/IRQ window open exits if needed */ | |
1499e54a | 5290 | if (nmi_pending) |
b463a6f7 AK |
5291 | kvm_x86_ops->enable_nmi_window(vcpu); |
5292 | else if (kvm_cpu_has_interrupt(vcpu) || req_int_win) | |
5293 | kvm_x86_ops->enable_irq_window(vcpu); | |
5294 | ||
5295 | if (kvm_lapic_enabled(vcpu)) { | |
5296 | update_cr8_intercept(vcpu); | |
5297 | kvm_lapic_sync_to_vapic(vcpu); | |
5298 | } | |
5299 | } | |
5300 | ||
b6c7a5dc HB |
5301 | preempt_disable(); |
5302 | ||
5303 | kvm_x86_ops->prepare_guest_switch(vcpu); | |
2608d7a1 AK |
5304 | if (vcpu->fpu_active) |
5305 | kvm_load_guest_fpu(vcpu); | |
2acf923e | 5306 | kvm_load_guest_xcr0(vcpu); |
b6c7a5dc | 5307 | |
6b7e2d09 XG |
5308 | vcpu->mode = IN_GUEST_MODE; |
5309 | ||
5310 | /* We should set ->mode before check ->requests, | |
5311 | * see the comment in make_all_cpus_request. | |
5312 | */ | |
5313 | smp_mb(); | |
b6c7a5dc | 5314 | |
d94e1dc9 | 5315 | local_irq_disable(); |
32f88400 | 5316 | |
6b7e2d09 | 5317 | if (vcpu->mode == EXITING_GUEST_MODE || vcpu->requests |
d94e1dc9 | 5318 | || need_resched() || signal_pending(current)) { |
6b7e2d09 | 5319 | vcpu->mode = OUTSIDE_GUEST_MODE; |
d94e1dc9 | 5320 | smp_wmb(); |
6c142801 AK |
5321 | local_irq_enable(); |
5322 | preempt_enable(); | |
b463a6f7 | 5323 | kvm_x86_ops->cancel_injection(vcpu); |
6c142801 AK |
5324 | r = 1; |
5325 | goto out; | |
5326 | } | |
5327 | ||
f656ce01 | 5328 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
3200f405 | 5329 | |
b6c7a5dc HB |
5330 | kvm_guest_enter(); |
5331 | ||
42dbaa5a | 5332 | if (unlikely(vcpu->arch.switch_db_regs)) { |
42dbaa5a JK |
5333 | set_debugreg(0, 7); |
5334 | set_debugreg(vcpu->arch.eff_db[0], 0); | |
5335 | set_debugreg(vcpu->arch.eff_db[1], 1); | |
5336 | set_debugreg(vcpu->arch.eff_db[2], 2); | |
5337 | set_debugreg(vcpu->arch.eff_db[3], 3); | |
5338 | } | |
b6c7a5dc | 5339 | |
229456fc | 5340 | trace_kvm_entry(vcpu->vcpu_id); |
851ba692 | 5341 | kvm_x86_ops->run(vcpu); |
b6c7a5dc | 5342 | |
24f1e32c FW |
5343 | /* |
5344 | * If the guest has used debug registers, at least dr7 | |
5345 | * will be disabled while returning to the host. | |
5346 | * If we don't have active breakpoints in the host, we don't | |
5347 | * care about the messed up debug address registers. But if | |
5348 | * we have some of them active, restore the old state. | |
5349 | */ | |
59d8eb53 | 5350 | if (hw_breakpoint_active()) |
24f1e32c | 5351 | hw_breakpoint_restore(); |
42dbaa5a | 5352 | |
1d5f066e ZA |
5353 | kvm_get_msr(vcpu, MSR_IA32_TSC, &vcpu->arch.last_guest_tsc); |
5354 | ||
6b7e2d09 | 5355 | vcpu->mode = OUTSIDE_GUEST_MODE; |
d94e1dc9 | 5356 | smp_wmb(); |
b6c7a5dc HB |
5357 | local_irq_enable(); |
5358 | ||
5359 | ++vcpu->stat.exits; | |
5360 | ||
5361 | /* | |
5362 | * We must have an instruction between local_irq_enable() and | |
5363 | * kvm_guest_exit(), so the timer interrupt isn't delayed by | |
5364 | * the interrupt shadow. The stat.exits increment will do nicely. | |
5365 | * But we need to prevent reordering, hence this barrier(): | |
5366 | */ | |
5367 | barrier(); | |
5368 | ||
5369 | kvm_guest_exit(); | |
5370 | ||
5371 | preempt_enable(); | |
5372 | ||
f656ce01 | 5373 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
3200f405 | 5374 | |
b6c7a5dc HB |
5375 | /* |
5376 | * Profile KVM exit RIPs: | |
5377 | */ | |
5378 | if (unlikely(prof_on == KVM_PROFILING)) { | |
5fdbf976 MT |
5379 | unsigned long rip = kvm_rip_read(vcpu); |
5380 | profile_hit(KVM_PROFILING, (void *)rip); | |
b6c7a5dc HB |
5381 | } |
5382 | ||
298101da | 5383 | |
b93463aa AK |
5384 | kvm_lapic_sync_from_vapic(vcpu); |
5385 | ||
851ba692 | 5386 | r = kvm_x86_ops->handle_exit(vcpu); |
d7690175 MT |
5387 | out: |
5388 | return r; | |
5389 | } | |
b6c7a5dc | 5390 | |
09cec754 | 5391 | |
851ba692 | 5392 | static int __vcpu_run(struct kvm_vcpu *vcpu) |
d7690175 MT |
5393 | { |
5394 | int r; | |
f656ce01 | 5395 | struct kvm *kvm = vcpu->kvm; |
d7690175 MT |
5396 | |
5397 | if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_SIPI_RECEIVED)) { | |
1b10bf31 JK |
5398 | pr_debug("vcpu %d received sipi with vector # %x\n", |
5399 | vcpu->vcpu_id, vcpu->arch.sipi_vector); | |
d7690175 | 5400 | kvm_lapic_reset(vcpu); |
5f179287 | 5401 | r = kvm_arch_vcpu_reset(vcpu); |
d7690175 MT |
5402 | if (r) |
5403 | return r; | |
5404 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; | |
b6c7a5dc HB |
5405 | } |
5406 | ||
f656ce01 | 5407 | vcpu->srcu_idx = srcu_read_lock(&kvm->srcu); |
d7690175 MT |
5408 | vapic_enter(vcpu); |
5409 | ||
5410 | r = 1; | |
5411 | while (r > 0) { | |
af585b92 GN |
5412 | if (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE && |
5413 | !vcpu->arch.apf.halted) | |
851ba692 | 5414 | r = vcpu_enter_guest(vcpu); |
d7690175 | 5415 | else { |
f656ce01 | 5416 | srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx); |
d7690175 | 5417 | kvm_vcpu_block(vcpu); |
f656ce01 | 5418 | vcpu->srcu_idx = srcu_read_lock(&kvm->srcu); |
a8eeb04a | 5419 | if (kvm_check_request(KVM_REQ_UNHALT, vcpu)) |
09cec754 GN |
5420 | { |
5421 | switch(vcpu->arch.mp_state) { | |
5422 | case KVM_MP_STATE_HALTED: | |
d7690175 | 5423 | vcpu->arch.mp_state = |
09cec754 GN |
5424 | KVM_MP_STATE_RUNNABLE; |
5425 | case KVM_MP_STATE_RUNNABLE: | |
af585b92 | 5426 | vcpu->arch.apf.halted = false; |
09cec754 GN |
5427 | break; |
5428 | case KVM_MP_STATE_SIPI_RECEIVED: | |
5429 | default: | |
5430 | r = -EINTR; | |
5431 | break; | |
5432 | } | |
5433 | } | |
d7690175 MT |
5434 | } |
5435 | ||
09cec754 GN |
5436 | if (r <= 0) |
5437 | break; | |
5438 | ||
5439 | clear_bit(KVM_REQ_PENDING_TIMER, &vcpu->requests); | |
5440 | if (kvm_cpu_has_pending_timer(vcpu)) | |
5441 | kvm_inject_pending_timer_irqs(vcpu); | |
5442 | ||
851ba692 | 5443 | if (dm_request_for_irq_injection(vcpu)) { |
09cec754 | 5444 | r = -EINTR; |
851ba692 | 5445 | vcpu->run->exit_reason = KVM_EXIT_INTR; |
09cec754 GN |
5446 | ++vcpu->stat.request_irq_exits; |
5447 | } | |
af585b92 GN |
5448 | |
5449 | kvm_check_async_pf_completion(vcpu); | |
5450 | ||
09cec754 GN |
5451 | if (signal_pending(current)) { |
5452 | r = -EINTR; | |
851ba692 | 5453 | vcpu->run->exit_reason = KVM_EXIT_INTR; |
09cec754 GN |
5454 | ++vcpu->stat.signal_exits; |
5455 | } | |
5456 | if (need_resched()) { | |
f656ce01 | 5457 | srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx); |
09cec754 | 5458 | kvm_resched(vcpu); |
f656ce01 | 5459 | vcpu->srcu_idx = srcu_read_lock(&kvm->srcu); |
d7690175 | 5460 | } |
b6c7a5dc HB |
5461 | } |
5462 | ||
f656ce01 | 5463 | srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx); |
b6c7a5dc | 5464 | |
b93463aa AK |
5465 | vapic_exit(vcpu); |
5466 | ||
b6c7a5dc HB |
5467 | return r; |
5468 | } | |
5469 | ||
5287f194 AK |
5470 | static int complete_mmio(struct kvm_vcpu *vcpu) |
5471 | { | |
5472 | struct kvm_run *run = vcpu->run; | |
5473 | int r; | |
5474 | ||
5475 | if (!(vcpu->arch.pio.count || vcpu->mmio_needed)) | |
5476 | return 1; | |
5477 | ||
5478 | if (vcpu->mmio_needed) { | |
5287f194 | 5479 | vcpu->mmio_needed = 0; |
cef4dea0 AK |
5480 | if (!vcpu->mmio_is_write) |
5481 | memcpy(vcpu->mmio_data, run->mmio.data, 8); | |
5482 | vcpu->mmio_index += 8; | |
5483 | if (vcpu->mmio_index < vcpu->mmio_size) { | |
5484 | run->exit_reason = KVM_EXIT_MMIO; | |
5485 | run->mmio.phys_addr = vcpu->mmio_phys_addr + vcpu->mmio_index; | |
5486 | memcpy(run->mmio.data, vcpu->mmio_data + vcpu->mmio_index, 8); | |
5487 | run->mmio.len = min(vcpu->mmio_size - vcpu->mmio_index, 8); | |
5488 | run->mmio.is_write = vcpu->mmio_is_write; | |
5489 | vcpu->mmio_needed = 1; | |
5490 | return 0; | |
5491 | } | |
5492 | if (vcpu->mmio_is_write) | |
5493 | return 1; | |
5494 | vcpu->mmio_read_completed = 1; | |
5287f194 AK |
5495 | } |
5496 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); | |
5497 | r = emulate_instruction(vcpu, EMULTYPE_NO_DECODE); | |
5498 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); | |
5499 | if (r != EMULATE_DONE) | |
5500 | return 0; | |
5501 | return 1; | |
5502 | } | |
5503 | ||
b6c7a5dc HB |
5504 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
5505 | { | |
5506 | int r; | |
5507 | sigset_t sigsaved; | |
5508 | ||
e5c30142 AK |
5509 | if (!tsk_used_math(current) && init_fpu(current)) |
5510 | return -ENOMEM; | |
5511 | ||
ac9f6dc0 AK |
5512 | if (vcpu->sigset_active) |
5513 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
5514 | ||
a4535290 | 5515 | if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)) { |
b6c7a5dc | 5516 | kvm_vcpu_block(vcpu); |
d7690175 | 5517 | clear_bit(KVM_REQ_UNHALT, &vcpu->requests); |
ac9f6dc0 AK |
5518 | r = -EAGAIN; |
5519 | goto out; | |
b6c7a5dc HB |
5520 | } |
5521 | ||
b6c7a5dc | 5522 | /* re-sync apic's tpr */ |
eea1cff9 AP |
5523 | if (!irqchip_in_kernel(vcpu->kvm)) { |
5524 | if (kvm_set_cr8(vcpu, kvm_run->cr8) != 0) { | |
5525 | r = -EINVAL; | |
5526 | goto out; | |
5527 | } | |
5528 | } | |
b6c7a5dc | 5529 | |
5287f194 AK |
5530 | r = complete_mmio(vcpu); |
5531 | if (r <= 0) | |
5532 | goto out; | |
5533 | ||
5fdbf976 MT |
5534 | if (kvm_run->exit_reason == KVM_EXIT_HYPERCALL) |
5535 | kvm_register_write(vcpu, VCPU_REGS_RAX, | |
5536 | kvm_run->hypercall.ret); | |
b6c7a5dc | 5537 | |
851ba692 | 5538 | r = __vcpu_run(vcpu); |
b6c7a5dc HB |
5539 | |
5540 | out: | |
f1d86e46 | 5541 | post_kvm_run_save(vcpu); |
b6c7a5dc HB |
5542 | if (vcpu->sigset_active) |
5543 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
5544 | ||
b6c7a5dc HB |
5545 | return r; |
5546 | } | |
5547 | ||
5548 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
5549 | { | |
5fdbf976 MT |
5550 | regs->rax = kvm_register_read(vcpu, VCPU_REGS_RAX); |
5551 | regs->rbx = kvm_register_read(vcpu, VCPU_REGS_RBX); | |
5552 | regs->rcx = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
5553 | regs->rdx = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
5554 | regs->rsi = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
5555 | regs->rdi = kvm_register_read(vcpu, VCPU_REGS_RDI); | |
5556 | regs->rsp = kvm_register_read(vcpu, VCPU_REGS_RSP); | |
5557 | regs->rbp = kvm_register_read(vcpu, VCPU_REGS_RBP); | |
b6c7a5dc | 5558 | #ifdef CONFIG_X86_64 |
5fdbf976 MT |
5559 | regs->r8 = kvm_register_read(vcpu, VCPU_REGS_R8); |
5560 | regs->r9 = kvm_register_read(vcpu, VCPU_REGS_R9); | |
5561 | regs->r10 = kvm_register_read(vcpu, VCPU_REGS_R10); | |
5562 | regs->r11 = kvm_register_read(vcpu, VCPU_REGS_R11); | |
5563 | regs->r12 = kvm_register_read(vcpu, VCPU_REGS_R12); | |
5564 | regs->r13 = kvm_register_read(vcpu, VCPU_REGS_R13); | |
5565 | regs->r14 = kvm_register_read(vcpu, VCPU_REGS_R14); | |
5566 | regs->r15 = kvm_register_read(vcpu, VCPU_REGS_R15); | |
b6c7a5dc HB |
5567 | #endif |
5568 | ||
5fdbf976 | 5569 | regs->rip = kvm_rip_read(vcpu); |
91586a3b | 5570 | regs->rflags = kvm_get_rflags(vcpu); |
b6c7a5dc | 5571 | |
b6c7a5dc HB |
5572 | return 0; |
5573 | } | |
5574 | ||
5575 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
5576 | { | |
5fdbf976 MT |
5577 | kvm_register_write(vcpu, VCPU_REGS_RAX, regs->rax); |
5578 | kvm_register_write(vcpu, VCPU_REGS_RBX, regs->rbx); | |
5579 | kvm_register_write(vcpu, VCPU_REGS_RCX, regs->rcx); | |
5580 | kvm_register_write(vcpu, VCPU_REGS_RDX, regs->rdx); | |
5581 | kvm_register_write(vcpu, VCPU_REGS_RSI, regs->rsi); | |
5582 | kvm_register_write(vcpu, VCPU_REGS_RDI, regs->rdi); | |
5583 | kvm_register_write(vcpu, VCPU_REGS_RSP, regs->rsp); | |
5584 | kvm_register_write(vcpu, VCPU_REGS_RBP, regs->rbp); | |
b6c7a5dc | 5585 | #ifdef CONFIG_X86_64 |
5fdbf976 MT |
5586 | kvm_register_write(vcpu, VCPU_REGS_R8, regs->r8); |
5587 | kvm_register_write(vcpu, VCPU_REGS_R9, regs->r9); | |
5588 | kvm_register_write(vcpu, VCPU_REGS_R10, regs->r10); | |
5589 | kvm_register_write(vcpu, VCPU_REGS_R11, regs->r11); | |
5590 | kvm_register_write(vcpu, VCPU_REGS_R12, regs->r12); | |
5591 | kvm_register_write(vcpu, VCPU_REGS_R13, regs->r13); | |
5592 | kvm_register_write(vcpu, VCPU_REGS_R14, regs->r14); | |
5593 | kvm_register_write(vcpu, VCPU_REGS_R15, regs->r15); | |
b6c7a5dc HB |
5594 | #endif |
5595 | ||
5fdbf976 | 5596 | kvm_rip_write(vcpu, regs->rip); |
91586a3b | 5597 | kvm_set_rflags(vcpu, regs->rflags); |
b6c7a5dc | 5598 | |
b4f14abd JK |
5599 | vcpu->arch.exception.pending = false; |
5600 | ||
3842d135 AK |
5601 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
5602 | ||
b6c7a5dc HB |
5603 | return 0; |
5604 | } | |
5605 | ||
b6c7a5dc HB |
5606 | void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l) |
5607 | { | |
5608 | struct kvm_segment cs; | |
5609 | ||
3e6e0aab | 5610 | kvm_get_segment(vcpu, &cs, VCPU_SREG_CS); |
b6c7a5dc HB |
5611 | *db = cs.db; |
5612 | *l = cs.l; | |
5613 | } | |
5614 | EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits); | |
5615 | ||
5616 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, | |
5617 | struct kvm_sregs *sregs) | |
5618 | { | |
89a27f4d | 5619 | struct desc_ptr dt; |
b6c7a5dc | 5620 | |
3e6e0aab GT |
5621 | kvm_get_segment(vcpu, &sregs->cs, VCPU_SREG_CS); |
5622 | kvm_get_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
5623 | kvm_get_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
5624 | kvm_get_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
5625 | kvm_get_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
5626 | kvm_get_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
b6c7a5dc | 5627 | |
3e6e0aab GT |
5628 | kvm_get_segment(vcpu, &sregs->tr, VCPU_SREG_TR); |
5629 | kvm_get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
b6c7a5dc HB |
5630 | |
5631 | kvm_x86_ops->get_idt(vcpu, &dt); | |
89a27f4d GN |
5632 | sregs->idt.limit = dt.size; |
5633 | sregs->idt.base = dt.address; | |
b6c7a5dc | 5634 | kvm_x86_ops->get_gdt(vcpu, &dt); |
89a27f4d GN |
5635 | sregs->gdt.limit = dt.size; |
5636 | sregs->gdt.base = dt.address; | |
b6c7a5dc | 5637 | |
4d4ec087 | 5638 | sregs->cr0 = kvm_read_cr0(vcpu); |
ad312c7c | 5639 | sregs->cr2 = vcpu->arch.cr2; |
9f8fe504 | 5640 | sregs->cr3 = kvm_read_cr3(vcpu); |
fc78f519 | 5641 | sregs->cr4 = kvm_read_cr4(vcpu); |
2d3ad1f4 | 5642 | sregs->cr8 = kvm_get_cr8(vcpu); |
f6801dff | 5643 | sregs->efer = vcpu->arch.efer; |
b6c7a5dc HB |
5644 | sregs->apic_base = kvm_get_apic_base(vcpu); |
5645 | ||
923c61bb | 5646 | memset(sregs->interrupt_bitmap, 0, sizeof sregs->interrupt_bitmap); |
b6c7a5dc | 5647 | |
36752c9b | 5648 | if (vcpu->arch.interrupt.pending && !vcpu->arch.interrupt.soft) |
14d0bc1f GN |
5649 | set_bit(vcpu->arch.interrupt.nr, |
5650 | (unsigned long *)sregs->interrupt_bitmap); | |
16d7a191 | 5651 | |
b6c7a5dc HB |
5652 | return 0; |
5653 | } | |
5654 | ||
62d9f0db MT |
5655 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
5656 | struct kvm_mp_state *mp_state) | |
5657 | { | |
62d9f0db | 5658 | mp_state->mp_state = vcpu->arch.mp_state; |
62d9f0db MT |
5659 | return 0; |
5660 | } | |
5661 | ||
5662 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
5663 | struct kvm_mp_state *mp_state) | |
5664 | { | |
62d9f0db | 5665 | vcpu->arch.mp_state = mp_state->mp_state; |
3842d135 | 5666 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
62d9f0db MT |
5667 | return 0; |
5668 | } | |
5669 | ||
e269fb21 JK |
5670 | int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int reason, |
5671 | bool has_error_code, u32 error_code) | |
b6c7a5dc | 5672 | { |
4d2179e1 | 5673 | struct decode_cache *c = &vcpu->arch.emulate_ctxt.decode; |
8ec4722d | 5674 | int ret; |
e01c2426 | 5675 | |
8ec4722d | 5676 | init_emulate_ctxt(vcpu); |
c697518a | 5677 | |
9aabc88f | 5678 | ret = emulator_task_switch(&vcpu->arch.emulate_ctxt, |
e269fb21 JK |
5679 | tss_selector, reason, has_error_code, |
5680 | error_code); | |
c697518a | 5681 | |
c697518a | 5682 | if (ret) |
19d04437 | 5683 | return EMULATE_FAIL; |
37817f29 | 5684 | |
4d2179e1 | 5685 | memcpy(vcpu->arch.regs, c->regs, sizeof c->regs); |
95c55886 | 5686 | kvm_rip_write(vcpu, vcpu->arch.emulate_ctxt.eip); |
f6e78475 | 5687 | kvm_set_rflags(vcpu, vcpu->arch.emulate_ctxt.eflags); |
3842d135 | 5688 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
19d04437 | 5689 | return EMULATE_DONE; |
37817f29 IE |
5690 | } |
5691 | EXPORT_SYMBOL_GPL(kvm_task_switch); | |
5692 | ||
b6c7a5dc HB |
5693 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, |
5694 | struct kvm_sregs *sregs) | |
5695 | { | |
5696 | int mmu_reset_needed = 0; | |
63f42e02 | 5697 | int pending_vec, max_bits, idx; |
89a27f4d | 5698 | struct desc_ptr dt; |
b6c7a5dc | 5699 | |
89a27f4d GN |
5700 | dt.size = sregs->idt.limit; |
5701 | dt.address = sregs->idt.base; | |
b6c7a5dc | 5702 | kvm_x86_ops->set_idt(vcpu, &dt); |
89a27f4d GN |
5703 | dt.size = sregs->gdt.limit; |
5704 | dt.address = sregs->gdt.base; | |
b6c7a5dc HB |
5705 | kvm_x86_ops->set_gdt(vcpu, &dt); |
5706 | ||
ad312c7c | 5707 | vcpu->arch.cr2 = sregs->cr2; |
9f8fe504 | 5708 | mmu_reset_needed |= kvm_read_cr3(vcpu) != sregs->cr3; |
dc7e795e | 5709 | vcpu->arch.cr3 = sregs->cr3; |
aff48baa | 5710 | __set_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail); |
b6c7a5dc | 5711 | |
2d3ad1f4 | 5712 | kvm_set_cr8(vcpu, sregs->cr8); |
b6c7a5dc | 5713 | |
f6801dff | 5714 | mmu_reset_needed |= vcpu->arch.efer != sregs->efer; |
b6c7a5dc | 5715 | kvm_x86_ops->set_efer(vcpu, sregs->efer); |
b6c7a5dc HB |
5716 | kvm_set_apic_base(vcpu, sregs->apic_base); |
5717 | ||
4d4ec087 | 5718 | mmu_reset_needed |= kvm_read_cr0(vcpu) != sregs->cr0; |
b6c7a5dc | 5719 | kvm_x86_ops->set_cr0(vcpu, sregs->cr0); |
d7306163 | 5720 | vcpu->arch.cr0 = sregs->cr0; |
b6c7a5dc | 5721 | |
fc78f519 | 5722 | mmu_reset_needed |= kvm_read_cr4(vcpu) != sregs->cr4; |
b6c7a5dc | 5723 | kvm_x86_ops->set_cr4(vcpu, sregs->cr4); |
3ea3aa8c SY |
5724 | if (sregs->cr4 & X86_CR4_OSXSAVE) |
5725 | update_cpuid(vcpu); | |
63f42e02 XG |
5726 | |
5727 | idx = srcu_read_lock(&vcpu->kvm->srcu); | |
7c93be44 | 5728 | if (!is_long_mode(vcpu) && is_pae(vcpu)) { |
9f8fe504 | 5729 | load_pdptrs(vcpu, vcpu->arch.walk_mmu, kvm_read_cr3(vcpu)); |
7c93be44 MT |
5730 | mmu_reset_needed = 1; |
5731 | } | |
63f42e02 | 5732 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
b6c7a5dc HB |
5733 | |
5734 | if (mmu_reset_needed) | |
5735 | kvm_mmu_reset_context(vcpu); | |
5736 | ||
923c61bb GN |
5737 | max_bits = (sizeof sregs->interrupt_bitmap) << 3; |
5738 | pending_vec = find_first_bit( | |
5739 | (const unsigned long *)sregs->interrupt_bitmap, max_bits); | |
5740 | if (pending_vec < max_bits) { | |
66fd3f7f | 5741 | kvm_queue_interrupt(vcpu, pending_vec, false); |
923c61bb | 5742 | pr_debug("Set back pending irq %d\n", pending_vec); |
b6c7a5dc HB |
5743 | } |
5744 | ||
3e6e0aab GT |
5745 | kvm_set_segment(vcpu, &sregs->cs, VCPU_SREG_CS); |
5746 | kvm_set_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
5747 | kvm_set_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
5748 | kvm_set_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
5749 | kvm_set_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
5750 | kvm_set_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
b6c7a5dc | 5751 | |
3e6e0aab GT |
5752 | kvm_set_segment(vcpu, &sregs->tr, VCPU_SREG_TR); |
5753 | kvm_set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
b6c7a5dc | 5754 | |
5f0269f5 ME |
5755 | update_cr8_intercept(vcpu); |
5756 | ||
9c3e4aab | 5757 | /* Older userspace won't unhalt the vcpu on reset. */ |
c5af89b6 | 5758 | if (kvm_vcpu_is_bsp(vcpu) && kvm_rip_read(vcpu) == 0xfff0 && |
9c3e4aab | 5759 | sregs->cs.selector == 0xf000 && sregs->cs.base == 0xffff0000 && |
3eeb3288 | 5760 | !is_protmode(vcpu)) |
9c3e4aab MT |
5761 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
5762 | ||
3842d135 AK |
5763 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
5764 | ||
b6c7a5dc HB |
5765 | return 0; |
5766 | } | |
5767 | ||
d0bfb940 JK |
5768 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
5769 | struct kvm_guest_debug *dbg) | |
b6c7a5dc | 5770 | { |
355be0b9 | 5771 | unsigned long rflags; |
ae675ef0 | 5772 | int i, r; |
b6c7a5dc | 5773 | |
4f926bf2 JK |
5774 | if (dbg->control & (KVM_GUESTDBG_INJECT_DB | KVM_GUESTDBG_INJECT_BP)) { |
5775 | r = -EBUSY; | |
5776 | if (vcpu->arch.exception.pending) | |
2122ff5e | 5777 | goto out; |
4f926bf2 JK |
5778 | if (dbg->control & KVM_GUESTDBG_INJECT_DB) |
5779 | kvm_queue_exception(vcpu, DB_VECTOR); | |
5780 | else | |
5781 | kvm_queue_exception(vcpu, BP_VECTOR); | |
5782 | } | |
5783 | ||
91586a3b JK |
5784 | /* |
5785 | * Read rflags as long as potentially injected trace flags are still | |
5786 | * filtered out. | |
5787 | */ | |
5788 | rflags = kvm_get_rflags(vcpu); | |
355be0b9 JK |
5789 | |
5790 | vcpu->guest_debug = dbg->control; | |
5791 | if (!(vcpu->guest_debug & KVM_GUESTDBG_ENABLE)) | |
5792 | vcpu->guest_debug = 0; | |
5793 | ||
5794 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) { | |
ae675ef0 JK |
5795 | for (i = 0; i < KVM_NR_DB_REGS; ++i) |
5796 | vcpu->arch.eff_db[i] = dbg->arch.debugreg[i]; | |
5797 | vcpu->arch.switch_db_regs = | |
5798 | (dbg->arch.debugreg[7] & DR7_BP_EN_MASK); | |
5799 | } else { | |
5800 | for (i = 0; i < KVM_NR_DB_REGS; i++) | |
5801 | vcpu->arch.eff_db[i] = vcpu->arch.db[i]; | |
5802 | vcpu->arch.switch_db_regs = (vcpu->arch.dr7 & DR7_BP_EN_MASK); | |
5803 | } | |
5804 | ||
f92653ee JK |
5805 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) |
5806 | vcpu->arch.singlestep_rip = kvm_rip_read(vcpu) + | |
5807 | get_segment_base(vcpu, VCPU_SREG_CS); | |
94fe45da | 5808 | |
91586a3b JK |
5809 | /* |
5810 | * Trigger an rflags update that will inject or remove the trace | |
5811 | * flags. | |
5812 | */ | |
5813 | kvm_set_rflags(vcpu, rflags); | |
b6c7a5dc | 5814 | |
355be0b9 | 5815 | kvm_x86_ops->set_guest_debug(vcpu, dbg); |
b6c7a5dc | 5816 | |
4f926bf2 | 5817 | r = 0; |
d0bfb940 | 5818 | |
2122ff5e | 5819 | out: |
b6c7a5dc HB |
5820 | |
5821 | return r; | |
5822 | } | |
5823 | ||
8b006791 ZX |
5824 | /* |
5825 | * Translate a guest virtual address to a guest physical address. | |
5826 | */ | |
5827 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, | |
5828 | struct kvm_translation *tr) | |
5829 | { | |
5830 | unsigned long vaddr = tr->linear_address; | |
5831 | gpa_t gpa; | |
f656ce01 | 5832 | int idx; |
8b006791 | 5833 | |
f656ce01 | 5834 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
1871c602 | 5835 | gpa = kvm_mmu_gva_to_gpa_system(vcpu, vaddr, NULL); |
f656ce01 | 5836 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
8b006791 ZX |
5837 | tr->physical_address = gpa; |
5838 | tr->valid = gpa != UNMAPPED_GVA; | |
5839 | tr->writeable = 1; | |
5840 | tr->usermode = 0; | |
8b006791 ZX |
5841 | |
5842 | return 0; | |
5843 | } | |
5844 | ||
d0752060 HB |
5845 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) |
5846 | { | |
98918833 SY |
5847 | struct i387_fxsave_struct *fxsave = |
5848 | &vcpu->arch.guest_fpu.state->fxsave; | |
d0752060 | 5849 | |
d0752060 HB |
5850 | memcpy(fpu->fpr, fxsave->st_space, 128); |
5851 | fpu->fcw = fxsave->cwd; | |
5852 | fpu->fsw = fxsave->swd; | |
5853 | fpu->ftwx = fxsave->twd; | |
5854 | fpu->last_opcode = fxsave->fop; | |
5855 | fpu->last_ip = fxsave->rip; | |
5856 | fpu->last_dp = fxsave->rdp; | |
5857 | memcpy(fpu->xmm, fxsave->xmm_space, sizeof fxsave->xmm_space); | |
5858 | ||
d0752060 HB |
5859 | return 0; |
5860 | } | |
5861 | ||
5862 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
5863 | { | |
98918833 SY |
5864 | struct i387_fxsave_struct *fxsave = |
5865 | &vcpu->arch.guest_fpu.state->fxsave; | |
d0752060 | 5866 | |
d0752060 HB |
5867 | memcpy(fxsave->st_space, fpu->fpr, 128); |
5868 | fxsave->cwd = fpu->fcw; | |
5869 | fxsave->swd = fpu->fsw; | |
5870 | fxsave->twd = fpu->ftwx; | |
5871 | fxsave->fop = fpu->last_opcode; | |
5872 | fxsave->rip = fpu->last_ip; | |
5873 | fxsave->rdp = fpu->last_dp; | |
5874 | memcpy(fxsave->xmm_space, fpu->xmm, sizeof fxsave->xmm_space); | |
5875 | ||
d0752060 HB |
5876 | return 0; |
5877 | } | |
5878 | ||
10ab25cd | 5879 | int fx_init(struct kvm_vcpu *vcpu) |
d0752060 | 5880 | { |
10ab25cd JK |
5881 | int err; |
5882 | ||
5883 | err = fpu_alloc(&vcpu->arch.guest_fpu); | |
5884 | if (err) | |
5885 | return err; | |
5886 | ||
98918833 | 5887 | fpu_finit(&vcpu->arch.guest_fpu); |
d0752060 | 5888 | |
2acf923e DC |
5889 | /* |
5890 | * Ensure guest xcr0 is valid for loading | |
5891 | */ | |
5892 | vcpu->arch.xcr0 = XSTATE_FP; | |
5893 | ||
ad312c7c | 5894 | vcpu->arch.cr0 |= X86_CR0_ET; |
10ab25cd JK |
5895 | |
5896 | return 0; | |
d0752060 HB |
5897 | } |
5898 | EXPORT_SYMBOL_GPL(fx_init); | |
5899 | ||
98918833 SY |
5900 | static void fx_free(struct kvm_vcpu *vcpu) |
5901 | { | |
5902 | fpu_free(&vcpu->arch.guest_fpu); | |
5903 | } | |
5904 | ||
d0752060 HB |
5905 | void kvm_load_guest_fpu(struct kvm_vcpu *vcpu) |
5906 | { | |
2608d7a1 | 5907 | if (vcpu->guest_fpu_loaded) |
d0752060 HB |
5908 | return; |
5909 | ||
2acf923e DC |
5910 | /* |
5911 | * Restore all possible states in the guest, | |
5912 | * and assume host would use all available bits. | |
5913 | * Guest xcr0 would be loaded later. | |
5914 | */ | |
5915 | kvm_put_guest_xcr0(vcpu); | |
d0752060 | 5916 | vcpu->guest_fpu_loaded = 1; |
7cf30855 | 5917 | unlazy_fpu(current); |
98918833 | 5918 | fpu_restore_checking(&vcpu->arch.guest_fpu); |
0c04851c | 5919 | trace_kvm_fpu(1); |
d0752060 | 5920 | } |
d0752060 HB |
5921 | |
5922 | void kvm_put_guest_fpu(struct kvm_vcpu *vcpu) | |
5923 | { | |
2acf923e DC |
5924 | kvm_put_guest_xcr0(vcpu); |
5925 | ||
d0752060 HB |
5926 | if (!vcpu->guest_fpu_loaded) |
5927 | return; | |
5928 | ||
5929 | vcpu->guest_fpu_loaded = 0; | |
98918833 | 5930 | fpu_save_init(&vcpu->arch.guest_fpu); |
f096ed85 | 5931 | ++vcpu->stat.fpu_reload; |
a8eeb04a | 5932 | kvm_make_request(KVM_REQ_DEACTIVATE_FPU, vcpu); |
0c04851c | 5933 | trace_kvm_fpu(0); |
d0752060 | 5934 | } |
e9b11c17 ZX |
5935 | |
5936 | void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu) | |
5937 | { | |
12f9a48f | 5938 | kvmclock_reset(vcpu); |
7f1ea208 | 5939 | |
f5f48ee1 | 5940 | free_cpumask_var(vcpu->arch.wbinvd_dirty_mask); |
98918833 | 5941 | fx_free(vcpu); |
e9b11c17 ZX |
5942 | kvm_x86_ops->vcpu_free(vcpu); |
5943 | } | |
5944 | ||
5945 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, | |
5946 | unsigned int id) | |
5947 | { | |
6755bae8 ZA |
5948 | if (check_tsc_unstable() && atomic_read(&kvm->online_vcpus) != 0) |
5949 | printk_once(KERN_WARNING | |
5950 | "kvm: SMP vm created on host with unstable TSC; " | |
5951 | "guest TSC will not be reliable\n"); | |
26e5215f AK |
5952 | return kvm_x86_ops->vcpu_create(kvm, id); |
5953 | } | |
e9b11c17 | 5954 | |
26e5215f AK |
5955 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) |
5956 | { | |
5957 | int r; | |
e9b11c17 | 5958 | |
0bed3b56 | 5959 | vcpu->arch.mtrr_state.have_fixed = 1; |
e9b11c17 ZX |
5960 | vcpu_load(vcpu); |
5961 | r = kvm_arch_vcpu_reset(vcpu); | |
5962 | if (r == 0) | |
5963 | r = kvm_mmu_setup(vcpu); | |
5964 | vcpu_put(vcpu); | |
5965 | if (r < 0) | |
5966 | goto free_vcpu; | |
5967 | ||
26e5215f | 5968 | return 0; |
e9b11c17 ZX |
5969 | free_vcpu: |
5970 | kvm_x86_ops->vcpu_free(vcpu); | |
26e5215f | 5971 | return r; |
e9b11c17 ZX |
5972 | } |
5973 | ||
d40ccc62 | 5974 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
e9b11c17 | 5975 | { |
344d9588 GN |
5976 | vcpu->arch.apf.msr_val = 0; |
5977 | ||
e9b11c17 ZX |
5978 | vcpu_load(vcpu); |
5979 | kvm_mmu_unload(vcpu); | |
5980 | vcpu_put(vcpu); | |
5981 | ||
98918833 | 5982 | fx_free(vcpu); |
e9b11c17 ZX |
5983 | kvm_x86_ops->vcpu_free(vcpu); |
5984 | } | |
5985 | ||
5986 | int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu) | |
5987 | { | |
448fa4a9 JK |
5988 | vcpu->arch.nmi_pending = false; |
5989 | vcpu->arch.nmi_injected = false; | |
5990 | ||
42dbaa5a JK |
5991 | vcpu->arch.switch_db_regs = 0; |
5992 | memset(vcpu->arch.db, 0, sizeof(vcpu->arch.db)); | |
5993 | vcpu->arch.dr6 = DR6_FIXED_1; | |
5994 | vcpu->arch.dr7 = DR7_FIXED_1; | |
5995 | ||
3842d135 | 5996 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
344d9588 | 5997 | vcpu->arch.apf.msr_val = 0; |
3842d135 | 5998 | |
12f9a48f GC |
5999 | kvmclock_reset(vcpu); |
6000 | ||
af585b92 GN |
6001 | kvm_clear_async_pf_completion_queue(vcpu); |
6002 | kvm_async_pf_hash_reset(vcpu); | |
6003 | vcpu->arch.apf.halted = false; | |
3842d135 | 6004 | |
e9b11c17 ZX |
6005 | return kvm_x86_ops->vcpu_reset(vcpu); |
6006 | } | |
6007 | ||
10474ae8 | 6008 | int kvm_arch_hardware_enable(void *garbage) |
e9b11c17 | 6009 | { |
ca84d1a2 ZA |
6010 | struct kvm *kvm; |
6011 | struct kvm_vcpu *vcpu; | |
6012 | int i; | |
18863bdd AK |
6013 | |
6014 | kvm_shared_msr_cpu_online(); | |
ca84d1a2 ZA |
6015 | list_for_each_entry(kvm, &vm_list, vm_list) |
6016 | kvm_for_each_vcpu(i, vcpu, kvm) | |
6017 | if (vcpu->cpu == smp_processor_id()) | |
c285545f | 6018 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
10474ae8 | 6019 | return kvm_x86_ops->hardware_enable(garbage); |
e9b11c17 ZX |
6020 | } |
6021 | ||
6022 | void kvm_arch_hardware_disable(void *garbage) | |
6023 | { | |
6024 | kvm_x86_ops->hardware_disable(garbage); | |
3548bab5 | 6025 | drop_user_return_notifiers(garbage); |
e9b11c17 ZX |
6026 | } |
6027 | ||
6028 | int kvm_arch_hardware_setup(void) | |
6029 | { | |
6030 | return kvm_x86_ops->hardware_setup(); | |
6031 | } | |
6032 | ||
6033 | void kvm_arch_hardware_unsetup(void) | |
6034 | { | |
6035 | kvm_x86_ops->hardware_unsetup(); | |
6036 | } | |
6037 | ||
6038 | void kvm_arch_check_processor_compat(void *rtn) | |
6039 | { | |
6040 | kvm_x86_ops->check_processor_compatibility(rtn); | |
6041 | } | |
6042 | ||
6043 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) | |
6044 | { | |
6045 | struct page *page; | |
6046 | struct kvm *kvm; | |
6047 | int r; | |
6048 | ||
6049 | BUG_ON(vcpu->kvm == NULL); | |
6050 | kvm = vcpu->kvm; | |
6051 | ||
9aabc88f | 6052 | vcpu->arch.emulate_ctxt.ops = &emulate_ops; |
14dfe855 | 6053 | vcpu->arch.walk_mmu = &vcpu->arch.mmu; |
ad312c7c | 6054 | vcpu->arch.mmu.root_hpa = INVALID_PAGE; |
c30a358d | 6055 | vcpu->arch.mmu.translate_gpa = translate_gpa; |
02f59dc9 | 6056 | vcpu->arch.nested_mmu.translate_gpa = translate_nested_gpa; |
c5af89b6 | 6057 | if (!irqchip_in_kernel(kvm) || kvm_vcpu_is_bsp(vcpu)) |
a4535290 | 6058 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
e9b11c17 | 6059 | else |
a4535290 | 6060 | vcpu->arch.mp_state = KVM_MP_STATE_UNINITIALIZED; |
e9b11c17 ZX |
6061 | |
6062 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
6063 | if (!page) { | |
6064 | r = -ENOMEM; | |
6065 | goto fail; | |
6066 | } | |
ad312c7c | 6067 | vcpu->arch.pio_data = page_address(page); |
e9b11c17 | 6068 | |
1e993611 | 6069 | kvm_init_tsc_catchup(vcpu, max_tsc_khz); |
c285545f | 6070 | |
e9b11c17 ZX |
6071 | r = kvm_mmu_create(vcpu); |
6072 | if (r < 0) | |
6073 | goto fail_free_pio_data; | |
6074 | ||
6075 | if (irqchip_in_kernel(kvm)) { | |
6076 | r = kvm_create_lapic(vcpu); | |
6077 | if (r < 0) | |
6078 | goto fail_mmu_destroy; | |
6079 | } | |
6080 | ||
890ca9ae HY |
6081 | vcpu->arch.mce_banks = kzalloc(KVM_MAX_MCE_BANKS * sizeof(u64) * 4, |
6082 | GFP_KERNEL); | |
6083 | if (!vcpu->arch.mce_banks) { | |
6084 | r = -ENOMEM; | |
443c39bc | 6085 | goto fail_free_lapic; |
890ca9ae HY |
6086 | } |
6087 | vcpu->arch.mcg_cap = KVM_MAX_MCE_BANKS; | |
6088 | ||
f5f48ee1 SY |
6089 | if (!zalloc_cpumask_var(&vcpu->arch.wbinvd_dirty_mask, GFP_KERNEL)) |
6090 | goto fail_free_mce_banks; | |
6091 | ||
af585b92 GN |
6092 | kvm_async_pf_hash_reset(vcpu); |
6093 | ||
e9b11c17 | 6094 | return 0; |
f5f48ee1 SY |
6095 | fail_free_mce_banks: |
6096 | kfree(vcpu->arch.mce_banks); | |
443c39bc WY |
6097 | fail_free_lapic: |
6098 | kvm_free_lapic(vcpu); | |
e9b11c17 ZX |
6099 | fail_mmu_destroy: |
6100 | kvm_mmu_destroy(vcpu); | |
6101 | fail_free_pio_data: | |
ad312c7c | 6102 | free_page((unsigned long)vcpu->arch.pio_data); |
e9b11c17 ZX |
6103 | fail: |
6104 | return r; | |
6105 | } | |
6106 | ||
6107 | void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) | |
6108 | { | |
f656ce01 MT |
6109 | int idx; |
6110 | ||
36cb93fd | 6111 | kfree(vcpu->arch.mce_banks); |
e9b11c17 | 6112 | kvm_free_lapic(vcpu); |
f656ce01 | 6113 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
e9b11c17 | 6114 | kvm_mmu_destroy(vcpu); |
f656ce01 | 6115 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
ad312c7c | 6116 | free_page((unsigned long)vcpu->arch.pio_data); |
e9b11c17 | 6117 | } |
d19a9cd2 | 6118 | |
d89f5eff | 6119 | int kvm_arch_init_vm(struct kvm *kvm) |
d19a9cd2 | 6120 | { |
f05e70ac | 6121 | INIT_LIST_HEAD(&kvm->arch.active_mmu_pages); |
4d5c5d0f | 6122 | INIT_LIST_HEAD(&kvm->arch.assigned_dev_head); |
d19a9cd2 | 6123 | |
5550af4d SY |
6124 | /* Reserve bit 0 of irq_sources_bitmap for userspace irq source */ |
6125 | set_bit(KVM_USERSPACE_IRQ_SOURCE_ID, &kvm->arch.irq_sources_bitmap); | |
6126 | ||
038f8c11 | 6127 | raw_spin_lock_init(&kvm->arch.tsc_write_lock); |
53f658b3 | 6128 | |
d89f5eff | 6129 | return 0; |
d19a9cd2 ZX |
6130 | } |
6131 | ||
6132 | static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu) | |
6133 | { | |
6134 | vcpu_load(vcpu); | |
6135 | kvm_mmu_unload(vcpu); | |
6136 | vcpu_put(vcpu); | |
6137 | } | |
6138 | ||
6139 | static void kvm_free_vcpus(struct kvm *kvm) | |
6140 | { | |
6141 | unsigned int i; | |
988a2cae | 6142 | struct kvm_vcpu *vcpu; |
d19a9cd2 ZX |
6143 | |
6144 | /* | |
6145 | * Unpin any mmu pages first. | |
6146 | */ | |
af585b92 GN |
6147 | kvm_for_each_vcpu(i, vcpu, kvm) { |
6148 | kvm_clear_async_pf_completion_queue(vcpu); | |
988a2cae | 6149 | kvm_unload_vcpu_mmu(vcpu); |
af585b92 | 6150 | } |
988a2cae GN |
6151 | kvm_for_each_vcpu(i, vcpu, kvm) |
6152 | kvm_arch_vcpu_free(vcpu); | |
6153 | ||
6154 | mutex_lock(&kvm->lock); | |
6155 | for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) | |
6156 | kvm->vcpus[i] = NULL; | |
d19a9cd2 | 6157 | |
988a2cae GN |
6158 | atomic_set(&kvm->online_vcpus, 0); |
6159 | mutex_unlock(&kvm->lock); | |
d19a9cd2 ZX |
6160 | } |
6161 | ||
ad8ba2cd SY |
6162 | void kvm_arch_sync_events(struct kvm *kvm) |
6163 | { | |
ba4cef31 | 6164 | kvm_free_all_assigned_devices(kvm); |
aea924f6 | 6165 | kvm_free_pit(kvm); |
ad8ba2cd SY |
6166 | } |
6167 | ||
d19a9cd2 ZX |
6168 | void kvm_arch_destroy_vm(struct kvm *kvm) |
6169 | { | |
6eb55818 | 6170 | kvm_iommu_unmap_guest(kvm); |
d7deeeb0 ZX |
6171 | kfree(kvm->arch.vpic); |
6172 | kfree(kvm->arch.vioapic); | |
d19a9cd2 | 6173 | kvm_free_vcpus(kvm); |
3d45830c AK |
6174 | if (kvm->arch.apic_access_page) |
6175 | put_page(kvm->arch.apic_access_page); | |
b7ebfb05 SY |
6176 | if (kvm->arch.ept_identity_pagetable) |
6177 | put_page(kvm->arch.ept_identity_pagetable); | |
d19a9cd2 | 6178 | } |
0de10343 | 6179 | |
f7784b8e MT |
6180 | int kvm_arch_prepare_memory_region(struct kvm *kvm, |
6181 | struct kvm_memory_slot *memslot, | |
0de10343 | 6182 | struct kvm_memory_slot old, |
f7784b8e | 6183 | struct kvm_userspace_memory_region *mem, |
0de10343 ZX |
6184 | int user_alloc) |
6185 | { | |
f7784b8e | 6186 | int npages = memslot->npages; |
7ac77099 AK |
6187 | int map_flags = MAP_PRIVATE | MAP_ANONYMOUS; |
6188 | ||
6189 | /* Prevent internal slot pages from being moved by fork()/COW. */ | |
6190 | if (memslot->id >= KVM_MEMORY_SLOTS) | |
6191 | map_flags = MAP_SHARED | MAP_ANONYMOUS; | |
0de10343 ZX |
6192 | |
6193 | /*To keep backward compatibility with older userspace, | |
6194 | *x86 needs to hanlde !user_alloc case. | |
6195 | */ | |
6196 | if (!user_alloc) { | |
6197 | if (npages && !old.rmap) { | |
604b38ac AA |
6198 | unsigned long userspace_addr; |
6199 | ||
72dc67a6 | 6200 | down_write(¤t->mm->mmap_sem); |
604b38ac AA |
6201 | userspace_addr = do_mmap(NULL, 0, |
6202 | npages * PAGE_SIZE, | |
6203 | PROT_READ | PROT_WRITE, | |
7ac77099 | 6204 | map_flags, |
604b38ac | 6205 | 0); |
72dc67a6 | 6206 | up_write(¤t->mm->mmap_sem); |
0de10343 | 6207 | |
604b38ac AA |
6208 | if (IS_ERR((void *)userspace_addr)) |
6209 | return PTR_ERR((void *)userspace_addr); | |
6210 | ||
604b38ac | 6211 | memslot->userspace_addr = userspace_addr; |
0de10343 ZX |
6212 | } |
6213 | } | |
6214 | ||
f7784b8e MT |
6215 | |
6216 | return 0; | |
6217 | } | |
6218 | ||
6219 | void kvm_arch_commit_memory_region(struct kvm *kvm, | |
6220 | struct kvm_userspace_memory_region *mem, | |
6221 | struct kvm_memory_slot old, | |
6222 | int user_alloc) | |
6223 | { | |
6224 | ||
48c0e4e9 | 6225 | int nr_mmu_pages = 0, npages = mem->memory_size >> PAGE_SHIFT; |
f7784b8e MT |
6226 | |
6227 | if (!user_alloc && !old.user_alloc && old.rmap && !npages) { | |
6228 | int ret; | |
6229 | ||
6230 | down_write(¤t->mm->mmap_sem); | |
6231 | ret = do_munmap(current->mm, old.userspace_addr, | |
6232 | old.npages * PAGE_SIZE); | |
6233 | up_write(¤t->mm->mmap_sem); | |
6234 | if (ret < 0) | |
6235 | printk(KERN_WARNING | |
6236 | "kvm_vm_ioctl_set_memory_region: " | |
6237 | "failed to munmap memory\n"); | |
6238 | } | |
6239 | ||
48c0e4e9 XG |
6240 | if (!kvm->arch.n_requested_mmu_pages) |
6241 | nr_mmu_pages = kvm_mmu_calculate_mmu_pages(kvm); | |
6242 | ||
7c8a83b7 | 6243 | spin_lock(&kvm->mmu_lock); |
48c0e4e9 | 6244 | if (nr_mmu_pages) |
0de10343 | 6245 | kvm_mmu_change_mmu_pages(kvm, nr_mmu_pages); |
0de10343 | 6246 | kvm_mmu_slot_remove_write_access(kvm, mem->slot); |
7c8a83b7 | 6247 | spin_unlock(&kvm->mmu_lock); |
0de10343 | 6248 | } |
1d737c8a | 6249 | |
34d4cb8f MT |
6250 | void kvm_arch_flush_shadow(struct kvm *kvm) |
6251 | { | |
6252 | kvm_mmu_zap_all(kvm); | |
8986ecc0 | 6253 | kvm_reload_remote_mmus(kvm); |
34d4cb8f MT |
6254 | } |
6255 | ||
1d737c8a ZX |
6256 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
6257 | { | |
af585b92 GN |
6258 | return (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE && |
6259 | !vcpu->arch.apf.halted) | |
6260 | || !list_empty_careful(&vcpu->async_pf.done) | |
a1b37100 GN |
6261 | || vcpu->arch.mp_state == KVM_MP_STATE_SIPI_RECEIVED |
6262 | || vcpu->arch.nmi_pending || | |
6263 | (kvm_arch_interrupt_allowed(vcpu) && | |
6264 | kvm_cpu_has_interrupt(vcpu)); | |
1d737c8a | 6265 | } |
5736199a | 6266 | |
5736199a ZX |
6267 | void kvm_vcpu_kick(struct kvm_vcpu *vcpu) |
6268 | { | |
32f88400 MT |
6269 | int me; |
6270 | int cpu = vcpu->cpu; | |
5736199a ZX |
6271 | |
6272 | if (waitqueue_active(&vcpu->wq)) { | |
6273 | wake_up_interruptible(&vcpu->wq); | |
6274 | ++vcpu->stat.halt_wakeup; | |
6275 | } | |
32f88400 MT |
6276 | |
6277 | me = get_cpu(); | |
6278 | if (cpu != me && (unsigned)cpu < nr_cpu_ids && cpu_online(cpu)) | |
6b7e2d09 | 6279 | if (kvm_vcpu_exiting_guest_mode(vcpu) == IN_GUEST_MODE) |
32f88400 | 6280 | smp_send_reschedule(cpu); |
e9571ed5 | 6281 | put_cpu(); |
5736199a | 6282 | } |
78646121 GN |
6283 | |
6284 | int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu) | |
6285 | { | |
6286 | return kvm_x86_ops->interrupt_allowed(vcpu); | |
6287 | } | |
229456fc | 6288 | |
f92653ee JK |
6289 | bool kvm_is_linear_rip(struct kvm_vcpu *vcpu, unsigned long linear_rip) |
6290 | { | |
6291 | unsigned long current_rip = kvm_rip_read(vcpu) + | |
6292 | get_segment_base(vcpu, VCPU_SREG_CS); | |
6293 | ||
6294 | return current_rip == linear_rip; | |
6295 | } | |
6296 | EXPORT_SYMBOL_GPL(kvm_is_linear_rip); | |
6297 | ||
94fe45da JK |
6298 | unsigned long kvm_get_rflags(struct kvm_vcpu *vcpu) |
6299 | { | |
6300 | unsigned long rflags; | |
6301 | ||
6302 | rflags = kvm_x86_ops->get_rflags(vcpu); | |
6303 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) | |
c310bac5 | 6304 | rflags &= ~X86_EFLAGS_TF; |
94fe45da JK |
6305 | return rflags; |
6306 | } | |
6307 | EXPORT_SYMBOL_GPL(kvm_get_rflags); | |
6308 | ||
6309 | void kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags) | |
6310 | { | |
6311 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP && | |
f92653ee | 6312 | kvm_is_linear_rip(vcpu, vcpu->arch.singlestep_rip)) |
c310bac5 | 6313 | rflags |= X86_EFLAGS_TF; |
94fe45da | 6314 | kvm_x86_ops->set_rflags(vcpu, rflags); |
3842d135 | 6315 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
94fe45da JK |
6316 | } |
6317 | EXPORT_SYMBOL_GPL(kvm_set_rflags); | |
6318 | ||
56028d08 GN |
6319 | void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu, struct kvm_async_pf *work) |
6320 | { | |
6321 | int r; | |
6322 | ||
fb67e14f | 6323 | if ((vcpu->arch.mmu.direct_map != work->arch.direct_map) || |
c4806acd | 6324 | is_error_page(work->page)) |
56028d08 GN |
6325 | return; |
6326 | ||
6327 | r = kvm_mmu_reload(vcpu); | |
6328 | if (unlikely(r)) | |
6329 | return; | |
6330 | ||
fb67e14f XG |
6331 | if (!vcpu->arch.mmu.direct_map && |
6332 | work->arch.cr3 != vcpu->arch.mmu.get_cr3(vcpu)) | |
6333 | return; | |
6334 | ||
56028d08 GN |
6335 | vcpu->arch.mmu.page_fault(vcpu, work->gva, 0, true); |
6336 | } | |
6337 | ||
af585b92 GN |
6338 | static inline u32 kvm_async_pf_hash_fn(gfn_t gfn) |
6339 | { | |
6340 | return hash_32(gfn & 0xffffffff, order_base_2(ASYNC_PF_PER_VCPU)); | |
6341 | } | |
6342 | ||
6343 | static inline u32 kvm_async_pf_next_probe(u32 key) | |
6344 | { | |
6345 | return (key + 1) & (roundup_pow_of_two(ASYNC_PF_PER_VCPU) - 1); | |
6346 | } | |
6347 | ||
6348 | static void kvm_add_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn) | |
6349 | { | |
6350 | u32 key = kvm_async_pf_hash_fn(gfn); | |
6351 | ||
6352 | while (vcpu->arch.apf.gfns[key] != ~0) | |
6353 | key = kvm_async_pf_next_probe(key); | |
6354 | ||
6355 | vcpu->arch.apf.gfns[key] = gfn; | |
6356 | } | |
6357 | ||
6358 | static u32 kvm_async_pf_gfn_slot(struct kvm_vcpu *vcpu, gfn_t gfn) | |
6359 | { | |
6360 | int i; | |
6361 | u32 key = kvm_async_pf_hash_fn(gfn); | |
6362 | ||
6363 | for (i = 0; i < roundup_pow_of_two(ASYNC_PF_PER_VCPU) && | |
c7d28c24 XG |
6364 | (vcpu->arch.apf.gfns[key] != gfn && |
6365 | vcpu->arch.apf.gfns[key] != ~0); i++) | |
af585b92 GN |
6366 | key = kvm_async_pf_next_probe(key); |
6367 | ||
6368 | return key; | |
6369 | } | |
6370 | ||
6371 | bool kvm_find_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn) | |
6372 | { | |
6373 | return vcpu->arch.apf.gfns[kvm_async_pf_gfn_slot(vcpu, gfn)] == gfn; | |
6374 | } | |
6375 | ||
6376 | static void kvm_del_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn) | |
6377 | { | |
6378 | u32 i, j, k; | |
6379 | ||
6380 | i = j = kvm_async_pf_gfn_slot(vcpu, gfn); | |
6381 | while (true) { | |
6382 | vcpu->arch.apf.gfns[i] = ~0; | |
6383 | do { | |
6384 | j = kvm_async_pf_next_probe(j); | |
6385 | if (vcpu->arch.apf.gfns[j] == ~0) | |
6386 | return; | |
6387 | k = kvm_async_pf_hash_fn(vcpu->arch.apf.gfns[j]); | |
6388 | /* | |
6389 | * k lies cyclically in ]i,j] | |
6390 | * | i.k.j | | |
6391 | * |....j i.k.| or |.k..j i...| | |
6392 | */ | |
6393 | } while ((i <= j) ? (i < k && k <= j) : (i < k || k <= j)); | |
6394 | vcpu->arch.apf.gfns[i] = vcpu->arch.apf.gfns[j]; | |
6395 | i = j; | |
6396 | } | |
6397 | } | |
6398 | ||
7c90705b GN |
6399 | static int apf_put_user(struct kvm_vcpu *vcpu, u32 val) |
6400 | { | |
6401 | ||
6402 | return kvm_write_guest_cached(vcpu->kvm, &vcpu->arch.apf.data, &val, | |
6403 | sizeof(val)); | |
6404 | } | |
6405 | ||
af585b92 GN |
6406 | void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu, |
6407 | struct kvm_async_pf *work) | |
6408 | { | |
6389ee94 AK |
6409 | struct x86_exception fault; |
6410 | ||
7c90705b | 6411 | trace_kvm_async_pf_not_present(work->arch.token, work->gva); |
af585b92 | 6412 | kvm_add_async_pf_gfn(vcpu, work->arch.gfn); |
7c90705b GN |
6413 | |
6414 | if (!(vcpu->arch.apf.msr_val & KVM_ASYNC_PF_ENABLED) || | |
fc5f06fa GN |
6415 | (vcpu->arch.apf.send_user_only && |
6416 | kvm_x86_ops->get_cpl(vcpu) == 0)) | |
7c90705b GN |
6417 | kvm_make_request(KVM_REQ_APF_HALT, vcpu); |
6418 | else if (!apf_put_user(vcpu, KVM_PV_REASON_PAGE_NOT_PRESENT)) { | |
6389ee94 AK |
6419 | fault.vector = PF_VECTOR; |
6420 | fault.error_code_valid = true; | |
6421 | fault.error_code = 0; | |
6422 | fault.nested_page_fault = false; | |
6423 | fault.address = work->arch.token; | |
6424 | kvm_inject_page_fault(vcpu, &fault); | |
7c90705b | 6425 | } |
af585b92 GN |
6426 | } |
6427 | ||
6428 | void kvm_arch_async_page_present(struct kvm_vcpu *vcpu, | |
6429 | struct kvm_async_pf *work) | |
6430 | { | |
6389ee94 AK |
6431 | struct x86_exception fault; |
6432 | ||
7c90705b GN |
6433 | trace_kvm_async_pf_ready(work->arch.token, work->gva); |
6434 | if (is_error_page(work->page)) | |
6435 | work->arch.token = ~0; /* broadcast wakeup */ | |
6436 | else | |
6437 | kvm_del_async_pf_gfn(vcpu, work->arch.gfn); | |
6438 | ||
6439 | if ((vcpu->arch.apf.msr_val & KVM_ASYNC_PF_ENABLED) && | |
6440 | !apf_put_user(vcpu, KVM_PV_REASON_PAGE_READY)) { | |
6389ee94 AK |
6441 | fault.vector = PF_VECTOR; |
6442 | fault.error_code_valid = true; | |
6443 | fault.error_code = 0; | |
6444 | fault.nested_page_fault = false; | |
6445 | fault.address = work->arch.token; | |
6446 | kvm_inject_page_fault(vcpu, &fault); | |
7c90705b | 6447 | } |
e6d53e3b | 6448 | vcpu->arch.apf.halted = false; |
7c90705b GN |
6449 | } |
6450 | ||
6451 | bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu) | |
6452 | { | |
6453 | if (!(vcpu->arch.apf.msr_val & KVM_ASYNC_PF_ENABLED)) | |
6454 | return true; | |
6455 | else | |
6456 | return !kvm_event_needs_reinjection(vcpu) && | |
6457 | kvm_x86_ops->interrupt_allowed(vcpu); | |
af585b92 GN |
6458 | } |
6459 | ||
229456fc MT |
6460 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_exit); |
6461 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_inj_virq); | |
6462 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_page_fault); | |
6463 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_msr); | |
6464 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_cr); | |
0ac406de | 6465 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmrun); |
d8cabddf | 6466 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit); |
17897f36 | 6467 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit_inject); |
236649de | 6468 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intr_vmexit); |
ec1ff790 | 6469 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_invlpga); |
532a46b9 | 6470 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_skinit); |
2e554e8d | 6471 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intercepts); |