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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> |
aec51dc4 | 46 | #include <trace/events/kvm.h> |
2ed152af | 47 | |
229456fc MT |
48 | #define CREATE_TRACE_POINTS |
49 | #include "trace.h" | |
043405e1 | 50 | |
24f1e32c | 51 | #include <asm/debugreg.h> |
d825ed0a | 52 | #include <asm/msr.h> |
a5f61300 | 53 | #include <asm/desc.h> |
0bed3b56 | 54 | #include <asm/mtrr.h> |
890ca9ae | 55 | #include <asm/mce.h> |
7cf30855 | 56 | #include <asm/i387.h> |
98918833 | 57 | #include <asm/xcr.h> |
1d5f066e | 58 | #include <asm/pvclock.h> |
217fc9cf | 59 | #include <asm/div64.h> |
043405e1 | 60 | |
313a3dc7 | 61 | #define MAX_IO_MSRS 256 |
a03490ed CO |
62 | #define CR0_RESERVED_BITS \ |
63 | (~(unsigned long)(X86_CR0_PE | X86_CR0_MP | X86_CR0_EM | X86_CR0_TS \ | |
64 | | X86_CR0_ET | X86_CR0_NE | X86_CR0_WP | X86_CR0_AM \ | |
65 | | X86_CR0_NW | X86_CR0_CD | X86_CR0_PG)) | |
66 | #define CR4_RESERVED_BITS \ | |
67 | (~(unsigned long)(X86_CR4_VME | X86_CR4_PVI | X86_CR4_TSD | X86_CR4_DE\ | |
68 | | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_MCE \ | |
69 | | X86_CR4_PGE | X86_CR4_PCE | X86_CR4_OSFXSR \ | |
2acf923e | 70 | | X86_CR4_OSXSAVE \ |
a03490ed CO |
71 | | X86_CR4_OSXMMEXCPT | X86_CR4_VMXE)) |
72 | ||
73 | #define CR8_RESERVED_BITS (~(unsigned long)X86_CR8_TPR) | |
890ca9ae HY |
74 | |
75 | #define KVM_MAX_MCE_BANKS 32 | |
5854dbca | 76 | #define KVM_MCE_CAP_SUPPORTED (MCG_CTL_P | MCG_SER_P) |
890ca9ae | 77 | |
50a37eb4 JR |
78 | /* EFER defaults: |
79 | * - enable syscall per default because its emulated by KVM | |
80 | * - enable LME and LMA per default on 64 bit KVM | |
81 | */ | |
82 | #ifdef CONFIG_X86_64 | |
83 | static u64 __read_mostly efer_reserved_bits = 0xfffffffffffffafeULL; | |
84 | #else | |
85 | static u64 __read_mostly efer_reserved_bits = 0xfffffffffffffffeULL; | |
86 | #endif | |
313a3dc7 | 87 | |
ba1389b7 AK |
88 | #define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM |
89 | #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU | |
417bc304 | 90 | |
cb142eb7 | 91 | static void update_cr8_intercept(struct kvm_vcpu *vcpu); |
674eea0f AK |
92 | static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2 *cpuid, |
93 | struct kvm_cpuid_entry2 __user *entries); | |
94 | ||
97896d04 | 95 | struct kvm_x86_ops *kvm_x86_ops; |
5fdbf976 | 96 | EXPORT_SYMBOL_GPL(kvm_x86_ops); |
97896d04 | 97 | |
ed85c068 AP |
98 | int ignore_msrs = 0; |
99 | module_param_named(ignore_msrs, ignore_msrs, bool, S_IRUGO | S_IWUSR); | |
100 | ||
18863bdd AK |
101 | #define KVM_NR_SHARED_MSRS 16 |
102 | ||
103 | struct kvm_shared_msrs_global { | |
104 | int nr; | |
2bf78fa7 | 105 | u32 msrs[KVM_NR_SHARED_MSRS]; |
18863bdd AK |
106 | }; |
107 | ||
108 | struct kvm_shared_msrs { | |
109 | struct user_return_notifier urn; | |
110 | bool registered; | |
2bf78fa7 SY |
111 | struct kvm_shared_msr_values { |
112 | u64 host; | |
113 | u64 curr; | |
114 | } values[KVM_NR_SHARED_MSRS]; | |
18863bdd AK |
115 | }; |
116 | ||
117 | static struct kvm_shared_msrs_global __read_mostly shared_msrs_global; | |
118 | static DEFINE_PER_CPU(struct kvm_shared_msrs, shared_msrs); | |
119 | ||
417bc304 | 120 | struct kvm_stats_debugfs_item debugfs_entries[] = { |
ba1389b7 AK |
121 | { "pf_fixed", VCPU_STAT(pf_fixed) }, |
122 | { "pf_guest", VCPU_STAT(pf_guest) }, | |
123 | { "tlb_flush", VCPU_STAT(tlb_flush) }, | |
124 | { "invlpg", VCPU_STAT(invlpg) }, | |
125 | { "exits", VCPU_STAT(exits) }, | |
126 | { "io_exits", VCPU_STAT(io_exits) }, | |
127 | { "mmio_exits", VCPU_STAT(mmio_exits) }, | |
128 | { "signal_exits", VCPU_STAT(signal_exits) }, | |
129 | { "irq_window", VCPU_STAT(irq_window_exits) }, | |
f08864b4 | 130 | { "nmi_window", VCPU_STAT(nmi_window_exits) }, |
ba1389b7 AK |
131 | { "halt_exits", VCPU_STAT(halt_exits) }, |
132 | { "halt_wakeup", VCPU_STAT(halt_wakeup) }, | |
f11c3a8d | 133 | { "hypercalls", VCPU_STAT(hypercalls) }, |
ba1389b7 AK |
134 | { "request_irq", VCPU_STAT(request_irq_exits) }, |
135 | { "irq_exits", VCPU_STAT(irq_exits) }, | |
136 | { "host_state_reload", VCPU_STAT(host_state_reload) }, | |
137 | { "efer_reload", VCPU_STAT(efer_reload) }, | |
138 | { "fpu_reload", VCPU_STAT(fpu_reload) }, | |
139 | { "insn_emulation", VCPU_STAT(insn_emulation) }, | |
140 | { "insn_emulation_fail", VCPU_STAT(insn_emulation_fail) }, | |
fa89a817 | 141 | { "irq_injections", VCPU_STAT(irq_injections) }, |
c4abb7c9 | 142 | { "nmi_injections", VCPU_STAT(nmi_injections) }, |
4cee5764 AK |
143 | { "mmu_shadow_zapped", VM_STAT(mmu_shadow_zapped) }, |
144 | { "mmu_pte_write", VM_STAT(mmu_pte_write) }, | |
145 | { "mmu_pte_updated", VM_STAT(mmu_pte_updated) }, | |
146 | { "mmu_pde_zapped", VM_STAT(mmu_pde_zapped) }, | |
147 | { "mmu_flooded", VM_STAT(mmu_flooded) }, | |
148 | { "mmu_recycled", VM_STAT(mmu_recycled) }, | |
dfc5aa00 | 149 | { "mmu_cache_miss", VM_STAT(mmu_cache_miss) }, |
4731d4c7 | 150 | { "mmu_unsync", VM_STAT(mmu_unsync) }, |
0f74a24c | 151 | { "remote_tlb_flush", VM_STAT(remote_tlb_flush) }, |
05da4558 | 152 | { "largepages", VM_STAT(lpages) }, |
417bc304 HB |
153 | { NULL } |
154 | }; | |
155 | ||
2acf923e DC |
156 | u64 __read_mostly host_xcr0; |
157 | ||
158 | static inline u32 bit(int bitno) | |
159 | { | |
160 | return 1 << (bitno & 31); | |
161 | } | |
162 | ||
18863bdd AK |
163 | static void kvm_on_user_return(struct user_return_notifier *urn) |
164 | { | |
165 | unsigned slot; | |
18863bdd AK |
166 | struct kvm_shared_msrs *locals |
167 | = container_of(urn, struct kvm_shared_msrs, urn); | |
2bf78fa7 | 168 | struct kvm_shared_msr_values *values; |
18863bdd AK |
169 | |
170 | for (slot = 0; slot < shared_msrs_global.nr; ++slot) { | |
2bf78fa7 SY |
171 | values = &locals->values[slot]; |
172 | if (values->host != values->curr) { | |
173 | wrmsrl(shared_msrs_global.msrs[slot], values->host); | |
174 | values->curr = values->host; | |
18863bdd AK |
175 | } |
176 | } | |
177 | locals->registered = false; | |
178 | user_return_notifier_unregister(urn); | |
179 | } | |
180 | ||
2bf78fa7 | 181 | static void shared_msr_update(unsigned slot, u32 msr) |
18863bdd | 182 | { |
2bf78fa7 | 183 | struct kvm_shared_msrs *smsr; |
18863bdd AK |
184 | u64 value; |
185 | ||
2bf78fa7 SY |
186 | smsr = &__get_cpu_var(shared_msrs); |
187 | /* only read, and nobody should modify it at this time, | |
188 | * so don't need lock */ | |
189 | if (slot >= shared_msrs_global.nr) { | |
190 | printk(KERN_ERR "kvm: invalid MSR slot!"); | |
191 | return; | |
192 | } | |
193 | rdmsrl_safe(msr, &value); | |
194 | smsr->values[slot].host = value; | |
195 | smsr->values[slot].curr = value; | |
196 | } | |
197 | ||
198 | void kvm_define_shared_msr(unsigned slot, u32 msr) | |
199 | { | |
18863bdd AK |
200 | if (slot >= shared_msrs_global.nr) |
201 | shared_msrs_global.nr = slot + 1; | |
2bf78fa7 SY |
202 | shared_msrs_global.msrs[slot] = msr; |
203 | /* we need ensured the shared_msr_global have been updated */ | |
204 | smp_wmb(); | |
18863bdd AK |
205 | } |
206 | EXPORT_SYMBOL_GPL(kvm_define_shared_msr); | |
207 | ||
208 | static void kvm_shared_msr_cpu_online(void) | |
209 | { | |
210 | unsigned i; | |
18863bdd AK |
211 | |
212 | for (i = 0; i < shared_msrs_global.nr; ++i) | |
2bf78fa7 | 213 | shared_msr_update(i, shared_msrs_global.msrs[i]); |
18863bdd AK |
214 | } |
215 | ||
d5696725 | 216 | void kvm_set_shared_msr(unsigned slot, u64 value, u64 mask) |
18863bdd AK |
217 | { |
218 | struct kvm_shared_msrs *smsr = &__get_cpu_var(shared_msrs); | |
219 | ||
2bf78fa7 | 220 | if (((value ^ smsr->values[slot].curr) & mask) == 0) |
18863bdd | 221 | return; |
2bf78fa7 SY |
222 | smsr->values[slot].curr = value; |
223 | wrmsrl(shared_msrs_global.msrs[slot], value); | |
18863bdd AK |
224 | if (!smsr->registered) { |
225 | smsr->urn.on_user_return = kvm_on_user_return; | |
226 | user_return_notifier_register(&smsr->urn); | |
227 | smsr->registered = true; | |
228 | } | |
229 | } | |
230 | EXPORT_SYMBOL_GPL(kvm_set_shared_msr); | |
231 | ||
3548bab5 AK |
232 | static void drop_user_return_notifiers(void *ignore) |
233 | { | |
234 | struct kvm_shared_msrs *smsr = &__get_cpu_var(shared_msrs); | |
235 | ||
236 | if (smsr->registered) | |
237 | kvm_on_user_return(&smsr->urn); | |
238 | } | |
239 | ||
6866b83e CO |
240 | u64 kvm_get_apic_base(struct kvm_vcpu *vcpu) |
241 | { | |
242 | if (irqchip_in_kernel(vcpu->kvm)) | |
ad312c7c | 243 | return vcpu->arch.apic_base; |
6866b83e | 244 | else |
ad312c7c | 245 | return vcpu->arch.apic_base; |
6866b83e CO |
246 | } |
247 | EXPORT_SYMBOL_GPL(kvm_get_apic_base); | |
248 | ||
249 | void kvm_set_apic_base(struct kvm_vcpu *vcpu, u64 data) | |
250 | { | |
251 | /* TODO: reserve bits check */ | |
252 | if (irqchip_in_kernel(vcpu->kvm)) | |
253 | kvm_lapic_set_base(vcpu, data); | |
254 | else | |
ad312c7c | 255 | vcpu->arch.apic_base = data; |
6866b83e CO |
256 | } |
257 | EXPORT_SYMBOL_GPL(kvm_set_apic_base); | |
258 | ||
3fd28fce ED |
259 | #define EXCPT_BENIGN 0 |
260 | #define EXCPT_CONTRIBUTORY 1 | |
261 | #define EXCPT_PF 2 | |
262 | ||
263 | static int exception_class(int vector) | |
264 | { | |
265 | switch (vector) { | |
266 | case PF_VECTOR: | |
267 | return EXCPT_PF; | |
268 | case DE_VECTOR: | |
269 | case TS_VECTOR: | |
270 | case NP_VECTOR: | |
271 | case SS_VECTOR: | |
272 | case GP_VECTOR: | |
273 | return EXCPT_CONTRIBUTORY; | |
274 | default: | |
275 | break; | |
276 | } | |
277 | return EXCPT_BENIGN; | |
278 | } | |
279 | ||
280 | static void kvm_multiple_exception(struct kvm_vcpu *vcpu, | |
ce7ddec4 JR |
281 | unsigned nr, bool has_error, u32 error_code, |
282 | bool reinject) | |
3fd28fce ED |
283 | { |
284 | u32 prev_nr; | |
285 | int class1, class2; | |
286 | ||
3842d135 AK |
287 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
288 | ||
3fd28fce ED |
289 | if (!vcpu->arch.exception.pending) { |
290 | queue: | |
291 | vcpu->arch.exception.pending = true; | |
292 | vcpu->arch.exception.has_error_code = has_error; | |
293 | vcpu->arch.exception.nr = nr; | |
294 | vcpu->arch.exception.error_code = error_code; | |
3f0fd292 | 295 | vcpu->arch.exception.reinject = reinject; |
3fd28fce ED |
296 | return; |
297 | } | |
298 | ||
299 | /* to check exception */ | |
300 | prev_nr = vcpu->arch.exception.nr; | |
301 | if (prev_nr == DF_VECTOR) { | |
302 | /* triple fault -> shutdown */ | |
a8eeb04a | 303 | kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu); |
3fd28fce ED |
304 | return; |
305 | } | |
306 | class1 = exception_class(prev_nr); | |
307 | class2 = exception_class(nr); | |
308 | if ((class1 == EXCPT_CONTRIBUTORY && class2 == EXCPT_CONTRIBUTORY) | |
309 | || (class1 == EXCPT_PF && class2 != EXCPT_BENIGN)) { | |
310 | /* generate double fault per SDM Table 5-5 */ | |
311 | vcpu->arch.exception.pending = true; | |
312 | vcpu->arch.exception.has_error_code = true; | |
313 | vcpu->arch.exception.nr = DF_VECTOR; | |
314 | vcpu->arch.exception.error_code = 0; | |
315 | } else | |
316 | /* replace previous exception with a new one in a hope | |
317 | that instruction re-execution will regenerate lost | |
318 | exception */ | |
319 | goto queue; | |
320 | } | |
321 | ||
298101da AK |
322 | void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr) |
323 | { | |
ce7ddec4 | 324 | kvm_multiple_exception(vcpu, nr, false, 0, false); |
298101da AK |
325 | } |
326 | EXPORT_SYMBOL_GPL(kvm_queue_exception); | |
327 | ||
ce7ddec4 JR |
328 | void kvm_requeue_exception(struct kvm_vcpu *vcpu, unsigned nr) |
329 | { | |
330 | kvm_multiple_exception(vcpu, nr, false, 0, true); | |
331 | } | |
332 | EXPORT_SYMBOL_GPL(kvm_requeue_exception); | |
333 | ||
8df25a32 | 334 | void kvm_inject_page_fault(struct kvm_vcpu *vcpu) |
c3c91fee | 335 | { |
8df25a32 JR |
336 | unsigned error_code = vcpu->arch.fault.error_code; |
337 | ||
c3c91fee | 338 | ++vcpu->stat.pf_guest; |
8df25a32 | 339 | vcpu->arch.cr2 = vcpu->arch.fault.address; |
c3c91fee AK |
340 | kvm_queue_exception_e(vcpu, PF_VECTOR, error_code); |
341 | } | |
342 | ||
d4f8cf66 JR |
343 | void kvm_propagate_fault(struct kvm_vcpu *vcpu) |
344 | { | |
0959ffac | 345 | if (mmu_is_nested(vcpu) && !vcpu->arch.fault.nested) |
d4f8cf66 JR |
346 | vcpu->arch.nested_mmu.inject_page_fault(vcpu); |
347 | else | |
348 | vcpu->arch.mmu.inject_page_fault(vcpu); | |
0959ffac JR |
349 | |
350 | vcpu->arch.fault.nested = false; | |
d4f8cf66 JR |
351 | } |
352 | ||
3419ffc8 SY |
353 | void kvm_inject_nmi(struct kvm_vcpu *vcpu) |
354 | { | |
3842d135 | 355 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
3419ffc8 SY |
356 | vcpu->arch.nmi_pending = 1; |
357 | } | |
358 | EXPORT_SYMBOL_GPL(kvm_inject_nmi); | |
359 | ||
298101da AK |
360 | void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code) |
361 | { | |
ce7ddec4 | 362 | kvm_multiple_exception(vcpu, nr, true, error_code, false); |
298101da AK |
363 | } |
364 | EXPORT_SYMBOL_GPL(kvm_queue_exception_e); | |
365 | ||
ce7ddec4 JR |
366 | void kvm_requeue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code) |
367 | { | |
368 | kvm_multiple_exception(vcpu, nr, true, error_code, true); | |
369 | } | |
370 | EXPORT_SYMBOL_GPL(kvm_requeue_exception_e); | |
371 | ||
0a79b009 AK |
372 | /* |
373 | * Checks if cpl <= required_cpl; if true, return true. Otherwise queue | |
374 | * a #GP and return false. | |
375 | */ | |
376 | bool kvm_require_cpl(struct kvm_vcpu *vcpu, int required_cpl) | |
298101da | 377 | { |
0a79b009 AK |
378 | if (kvm_x86_ops->get_cpl(vcpu) <= required_cpl) |
379 | return true; | |
380 | kvm_queue_exception_e(vcpu, GP_VECTOR, 0); | |
381 | return false; | |
298101da | 382 | } |
0a79b009 | 383 | EXPORT_SYMBOL_GPL(kvm_require_cpl); |
298101da | 384 | |
ec92fe44 JR |
385 | /* |
386 | * This function will be used to read from the physical memory of the currently | |
387 | * running guest. The difference to kvm_read_guest_page is that this function | |
388 | * can read from guest physical or from the guest's guest physical memory. | |
389 | */ | |
390 | int kvm_read_guest_page_mmu(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, | |
391 | gfn_t ngfn, void *data, int offset, int len, | |
392 | u32 access) | |
393 | { | |
394 | gfn_t real_gfn; | |
395 | gpa_t ngpa; | |
396 | ||
397 | ngpa = gfn_to_gpa(ngfn); | |
398 | real_gfn = mmu->translate_gpa(vcpu, ngpa, access); | |
399 | if (real_gfn == UNMAPPED_GVA) | |
400 | return -EFAULT; | |
401 | ||
402 | real_gfn = gpa_to_gfn(real_gfn); | |
403 | ||
404 | return kvm_read_guest_page(vcpu->kvm, real_gfn, data, offset, len); | |
405 | } | |
406 | EXPORT_SYMBOL_GPL(kvm_read_guest_page_mmu); | |
407 | ||
3d06b8bf JR |
408 | int kvm_read_nested_guest_page(struct kvm_vcpu *vcpu, gfn_t gfn, |
409 | void *data, int offset, int len, u32 access) | |
410 | { | |
411 | return kvm_read_guest_page_mmu(vcpu, vcpu->arch.walk_mmu, gfn, | |
412 | data, offset, len, access); | |
413 | } | |
414 | ||
a03490ed CO |
415 | /* |
416 | * Load the pae pdptrs. Return true is they are all valid. | |
417 | */ | |
ff03a073 | 418 | int load_pdptrs(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, unsigned long cr3) |
a03490ed CO |
419 | { |
420 | gfn_t pdpt_gfn = cr3 >> PAGE_SHIFT; | |
421 | unsigned offset = ((cr3 & (PAGE_SIZE-1)) >> 5) << 2; | |
422 | int i; | |
423 | int ret; | |
ff03a073 | 424 | u64 pdpte[ARRAY_SIZE(mmu->pdptrs)]; |
a03490ed | 425 | |
ff03a073 JR |
426 | ret = kvm_read_guest_page_mmu(vcpu, mmu, pdpt_gfn, pdpte, |
427 | offset * sizeof(u64), sizeof(pdpte), | |
428 | PFERR_USER_MASK|PFERR_WRITE_MASK); | |
a03490ed CO |
429 | if (ret < 0) { |
430 | ret = 0; | |
431 | goto out; | |
432 | } | |
433 | for (i = 0; i < ARRAY_SIZE(pdpte); ++i) { | |
43a3795a | 434 | if (is_present_gpte(pdpte[i]) && |
20c466b5 | 435 | (pdpte[i] & vcpu->arch.mmu.rsvd_bits_mask[0][2])) { |
a03490ed CO |
436 | ret = 0; |
437 | goto out; | |
438 | } | |
439 | } | |
440 | ret = 1; | |
441 | ||
ff03a073 | 442 | memcpy(mmu->pdptrs, pdpte, sizeof(mmu->pdptrs)); |
6de4f3ad AK |
443 | __set_bit(VCPU_EXREG_PDPTR, |
444 | (unsigned long *)&vcpu->arch.regs_avail); | |
445 | __set_bit(VCPU_EXREG_PDPTR, | |
446 | (unsigned long *)&vcpu->arch.regs_dirty); | |
a03490ed | 447 | out: |
a03490ed CO |
448 | |
449 | return ret; | |
450 | } | |
cc4b6871 | 451 | EXPORT_SYMBOL_GPL(load_pdptrs); |
a03490ed | 452 | |
d835dfec AK |
453 | static bool pdptrs_changed(struct kvm_vcpu *vcpu) |
454 | { | |
ff03a073 | 455 | u64 pdpte[ARRAY_SIZE(vcpu->arch.walk_mmu->pdptrs)]; |
d835dfec | 456 | bool changed = true; |
3d06b8bf JR |
457 | int offset; |
458 | gfn_t gfn; | |
d835dfec AK |
459 | int r; |
460 | ||
461 | if (is_long_mode(vcpu) || !is_pae(vcpu)) | |
462 | return false; | |
463 | ||
6de4f3ad AK |
464 | if (!test_bit(VCPU_EXREG_PDPTR, |
465 | (unsigned long *)&vcpu->arch.regs_avail)) | |
466 | return true; | |
467 | ||
3d06b8bf JR |
468 | gfn = (vcpu->arch.cr3 & ~31u) >> PAGE_SHIFT; |
469 | offset = (vcpu->arch.cr3 & ~31u) & (PAGE_SIZE - 1); | |
470 | r = kvm_read_nested_guest_page(vcpu, gfn, pdpte, offset, sizeof(pdpte), | |
471 | PFERR_USER_MASK | PFERR_WRITE_MASK); | |
d835dfec AK |
472 | if (r < 0) |
473 | goto out; | |
ff03a073 | 474 | changed = memcmp(pdpte, vcpu->arch.walk_mmu->pdptrs, sizeof(pdpte)) != 0; |
d835dfec | 475 | out: |
d835dfec AK |
476 | |
477 | return changed; | |
478 | } | |
479 | ||
49a9b07e | 480 | int kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) |
a03490ed | 481 | { |
aad82703 SY |
482 | unsigned long old_cr0 = kvm_read_cr0(vcpu); |
483 | unsigned long update_bits = X86_CR0_PG | X86_CR0_WP | | |
484 | X86_CR0_CD | X86_CR0_NW; | |
485 | ||
f9a48e6a AK |
486 | cr0 |= X86_CR0_ET; |
487 | ||
ab344828 | 488 | #ifdef CONFIG_X86_64 |
0f12244f GN |
489 | if (cr0 & 0xffffffff00000000UL) |
490 | return 1; | |
ab344828 GN |
491 | #endif |
492 | ||
493 | cr0 &= ~CR0_RESERVED_BITS; | |
a03490ed | 494 | |
0f12244f GN |
495 | if ((cr0 & X86_CR0_NW) && !(cr0 & X86_CR0_CD)) |
496 | return 1; | |
a03490ed | 497 | |
0f12244f GN |
498 | if ((cr0 & X86_CR0_PG) && !(cr0 & X86_CR0_PE)) |
499 | return 1; | |
a03490ed CO |
500 | |
501 | if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) { | |
502 | #ifdef CONFIG_X86_64 | |
f6801dff | 503 | if ((vcpu->arch.efer & EFER_LME)) { |
a03490ed CO |
504 | int cs_db, cs_l; |
505 | ||
0f12244f GN |
506 | if (!is_pae(vcpu)) |
507 | return 1; | |
a03490ed | 508 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); |
0f12244f GN |
509 | if (cs_l) |
510 | return 1; | |
a03490ed CO |
511 | } else |
512 | #endif | |
ff03a073 JR |
513 | if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->arch.walk_mmu, |
514 | vcpu->arch.cr3)) | |
0f12244f | 515 | return 1; |
a03490ed CO |
516 | } |
517 | ||
518 | kvm_x86_ops->set_cr0(vcpu, cr0); | |
a03490ed | 519 | |
aad82703 SY |
520 | if ((cr0 ^ old_cr0) & update_bits) |
521 | kvm_mmu_reset_context(vcpu); | |
0f12244f GN |
522 | return 0; |
523 | } | |
2d3ad1f4 | 524 | EXPORT_SYMBOL_GPL(kvm_set_cr0); |
a03490ed | 525 | |
2d3ad1f4 | 526 | void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw) |
a03490ed | 527 | { |
49a9b07e | 528 | (void)kvm_set_cr0(vcpu, kvm_read_cr0_bits(vcpu, ~0x0eul) | (msw & 0x0f)); |
a03490ed | 529 | } |
2d3ad1f4 | 530 | EXPORT_SYMBOL_GPL(kvm_lmsw); |
a03490ed | 531 | |
2acf923e DC |
532 | int __kvm_set_xcr(struct kvm_vcpu *vcpu, u32 index, u64 xcr) |
533 | { | |
534 | u64 xcr0; | |
535 | ||
536 | /* Only support XCR_XFEATURE_ENABLED_MASK(xcr0) now */ | |
537 | if (index != XCR_XFEATURE_ENABLED_MASK) | |
538 | return 1; | |
539 | xcr0 = xcr; | |
540 | if (kvm_x86_ops->get_cpl(vcpu) != 0) | |
541 | return 1; | |
542 | if (!(xcr0 & XSTATE_FP)) | |
543 | return 1; | |
544 | if ((xcr0 & XSTATE_YMM) && !(xcr0 & XSTATE_SSE)) | |
545 | return 1; | |
546 | if (xcr0 & ~host_xcr0) | |
547 | return 1; | |
548 | vcpu->arch.xcr0 = xcr0; | |
549 | vcpu->guest_xcr0_loaded = 0; | |
550 | return 0; | |
551 | } | |
552 | ||
553 | int kvm_set_xcr(struct kvm_vcpu *vcpu, u32 index, u64 xcr) | |
554 | { | |
555 | if (__kvm_set_xcr(vcpu, index, xcr)) { | |
556 | kvm_inject_gp(vcpu, 0); | |
557 | return 1; | |
558 | } | |
559 | return 0; | |
560 | } | |
561 | EXPORT_SYMBOL_GPL(kvm_set_xcr); | |
562 | ||
563 | static bool guest_cpuid_has_xsave(struct kvm_vcpu *vcpu) | |
564 | { | |
565 | struct kvm_cpuid_entry2 *best; | |
566 | ||
567 | best = kvm_find_cpuid_entry(vcpu, 1, 0); | |
568 | return best && (best->ecx & bit(X86_FEATURE_XSAVE)); | |
569 | } | |
570 | ||
571 | static void update_cpuid(struct kvm_vcpu *vcpu) | |
572 | { | |
573 | struct kvm_cpuid_entry2 *best; | |
574 | ||
575 | best = kvm_find_cpuid_entry(vcpu, 1, 0); | |
576 | if (!best) | |
577 | return; | |
578 | ||
579 | /* Update OSXSAVE bit */ | |
580 | if (cpu_has_xsave && best->function == 0x1) { | |
581 | best->ecx &= ~(bit(X86_FEATURE_OSXSAVE)); | |
582 | if (kvm_read_cr4_bits(vcpu, X86_CR4_OSXSAVE)) | |
583 | best->ecx |= bit(X86_FEATURE_OSXSAVE); | |
584 | } | |
585 | } | |
586 | ||
a83b29c6 | 587 | int kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4) |
a03490ed | 588 | { |
fc78f519 | 589 | unsigned long old_cr4 = kvm_read_cr4(vcpu); |
a2edf57f AK |
590 | unsigned long pdptr_bits = X86_CR4_PGE | X86_CR4_PSE | X86_CR4_PAE; |
591 | ||
0f12244f GN |
592 | if (cr4 & CR4_RESERVED_BITS) |
593 | return 1; | |
a03490ed | 594 | |
2acf923e DC |
595 | if (!guest_cpuid_has_xsave(vcpu) && (cr4 & X86_CR4_OSXSAVE)) |
596 | return 1; | |
597 | ||
a03490ed | 598 | if (is_long_mode(vcpu)) { |
0f12244f GN |
599 | if (!(cr4 & X86_CR4_PAE)) |
600 | return 1; | |
a2edf57f AK |
601 | } else if (is_paging(vcpu) && (cr4 & X86_CR4_PAE) |
602 | && ((cr4 ^ old_cr4) & pdptr_bits) | |
ff03a073 | 603 | && !load_pdptrs(vcpu, vcpu->arch.walk_mmu, vcpu->arch.cr3)) |
0f12244f GN |
604 | return 1; |
605 | ||
606 | if (cr4 & X86_CR4_VMXE) | |
607 | return 1; | |
a03490ed | 608 | |
a03490ed | 609 | kvm_x86_ops->set_cr4(vcpu, cr4); |
62ad0755 | 610 | |
aad82703 SY |
611 | if ((cr4 ^ old_cr4) & pdptr_bits) |
612 | kvm_mmu_reset_context(vcpu); | |
0f12244f | 613 | |
2acf923e DC |
614 | if ((cr4 ^ old_cr4) & X86_CR4_OSXSAVE) |
615 | update_cpuid(vcpu); | |
616 | ||
0f12244f GN |
617 | return 0; |
618 | } | |
2d3ad1f4 | 619 | EXPORT_SYMBOL_GPL(kvm_set_cr4); |
a03490ed | 620 | |
2390218b | 621 | int kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3) |
a03490ed | 622 | { |
ad312c7c | 623 | if (cr3 == vcpu->arch.cr3 && !pdptrs_changed(vcpu)) { |
0ba73cda | 624 | kvm_mmu_sync_roots(vcpu); |
d835dfec | 625 | kvm_mmu_flush_tlb(vcpu); |
0f12244f | 626 | return 0; |
d835dfec AK |
627 | } |
628 | ||
a03490ed | 629 | if (is_long_mode(vcpu)) { |
0f12244f GN |
630 | if (cr3 & CR3_L_MODE_RESERVED_BITS) |
631 | return 1; | |
a03490ed CO |
632 | } else { |
633 | if (is_pae(vcpu)) { | |
0f12244f GN |
634 | if (cr3 & CR3_PAE_RESERVED_BITS) |
635 | return 1; | |
ff03a073 JR |
636 | if (is_paging(vcpu) && |
637 | !load_pdptrs(vcpu, vcpu->arch.walk_mmu, cr3)) | |
0f12244f | 638 | return 1; |
a03490ed CO |
639 | } |
640 | /* | |
641 | * We don't check reserved bits in nonpae mode, because | |
642 | * this isn't enforced, and VMware depends on this. | |
643 | */ | |
644 | } | |
645 | ||
a03490ed CO |
646 | /* |
647 | * Does the new cr3 value map to physical memory? (Note, we | |
648 | * catch an invalid cr3 even in real-mode, because it would | |
649 | * cause trouble later on when we turn on paging anyway.) | |
650 | * | |
651 | * A real CPU would silently accept an invalid cr3 and would | |
652 | * attempt to use it - with largely undefined (and often hard | |
653 | * to debug) behavior on the guest side. | |
654 | */ | |
655 | if (unlikely(!gfn_to_memslot(vcpu->kvm, cr3 >> PAGE_SHIFT))) | |
0f12244f GN |
656 | return 1; |
657 | vcpu->arch.cr3 = cr3; | |
658 | vcpu->arch.mmu.new_cr3(vcpu); | |
659 | return 0; | |
660 | } | |
2d3ad1f4 | 661 | EXPORT_SYMBOL_GPL(kvm_set_cr3); |
a03490ed | 662 | |
0f12244f | 663 | int __kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8) |
a03490ed | 664 | { |
0f12244f GN |
665 | if (cr8 & CR8_RESERVED_BITS) |
666 | return 1; | |
a03490ed CO |
667 | if (irqchip_in_kernel(vcpu->kvm)) |
668 | kvm_lapic_set_tpr(vcpu, cr8); | |
669 | else | |
ad312c7c | 670 | vcpu->arch.cr8 = cr8; |
0f12244f GN |
671 | return 0; |
672 | } | |
673 | ||
674 | void kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8) | |
675 | { | |
676 | if (__kvm_set_cr8(vcpu, cr8)) | |
677 | kvm_inject_gp(vcpu, 0); | |
a03490ed | 678 | } |
2d3ad1f4 | 679 | EXPORT_SYMBOL_GPL(kvm_set_cr8); |
a03490ed | 680 | |
2d3ad1f4 | 681 | unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu) |
a03490ed CO |
682 | { |
683 | if (irqchip_in_kernel(vcpu->kvm)) | |
684 | return kvm_lapic_get_cr8(vcpu); | |
685 | else | |
ad312c7c | 686 | return vcpu->arch.cr8; |
a03490ed | 687 | } |
2d3ad1f4 | 688 | EXPORT_SYMBOL_GPL(kvm_get_cr8); |
a03490ed | 689 | |
338dbc97 | 690 | static int __kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val) |
020df079 GN |
691 | { |
692 | switch (dr) { | |
693 | case 0 ... 3: | |
694 | vcpu->arch.db[dr] = val; | |
695 | if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)) | |
696 | vcpu->arch.eff_db[dr] = val; | |
697 | break; | |
698 | case 4: | |
338dbc97 GN |
699 | if (kvm_read_cr4_bits(vcpu, X86_CR4_DE)) |
700 | return 1; /* #UD */ | |
020df079 GN |
701 | /* fall through */ |
702 | case 6: | |
338dbc97 GN |
703 | if (val & 0xffffffff00000000ULL) |
704 | return -1; /* #GP */ | |
020df079 GN |
705 | vcpu->arch.dr6 = (val & DR6_VOLATILE) | DR6_FIXED_1; |
706 | break; | |
707 | case 5: | |
338dbc97 GN |
708 | if (kvm_read_cr4_bits(vcpu, X86_CR4_DE)) |
709 | return 1; /* #UD */ | |
020df079 GN |
710 | /* fall through */ |
711 | default: /* 7 */ | |
338dbc97 GN |
712 | if (val & 0xffffffff00000000ULL) |
713 | return -1; /* #GP */ | |
020df079 GN |
714 | vcpu->arch.dr7 = (val & DR7_VOLATILE) | DR7_FIXED_1; |
715 | if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)) { | |
716 | kvm_x86_ops->set_dr7(vcpu, vcpu->arch.dr7); | |
717 | vcpu->arch.switch_db_regs = (val & DR7_BP_EN_MASK); | |
718 | } | |
719 | break; | |
720 | } | |
721 | ||
722 | return 0; | |
723 | } | |
338dbc97 GN |
724 | |
725 | int kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val) | |
726 | { | |
727 | int res; | |
728 | ||
729 | res = __kvm_set_dr(vcpu, dr, val); | |
730 | if (res > 0) | |
731 | kvm_queue_exception(vcpu, UD_VECTOR); | |
732 | else if (res < 0) | |
733 | kvm_inject_gp(vcpu, 0); | |
734 | ||
735 | return res; | |
736 | } | |
020df079 GN |
737 | EXPORT_SYMBOL_GPL(kvm_set_dr); |
738 | ||
338dbc97 | 739 | static int _kvm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *val) |
020df079 GN |
740 | { |
741 | switch (dr) { | |
742 | case 0 ... 3: | |
743 | *val = vcpu->arch.db[dr]; | |
744 | break; | |
745 | case 4: | |
338dbc97 | 746 | if (kvm_read_cr4_bits(vcpu, X86_CR4_DE)) |
020df079 | 747 | return 1; |
020df079 GN |
748 | /* fall through */ |
749 | case 6: | |
750 | *val = vcpu->arch.dr6; | |
751 | break; | |
752 | case 5: | |
338dbc97 | 753 | if (kvm_read_cr4_bits(vcpu, X86_CR4_DE)) |
020df079 | 754 | return 1; |
020df079 GN |
755 | /* fall through */ |
756 | default: /* 7 */ | |
757 | *val = vcpu->arch.dr7; | |
758 | break; | |
759 | } | |
760 | ||
761 | return 0; | |
762 | } | |
338dbc97 GN |
763 | |
764 | int kvm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *val) | |
765 | { | |
766 | if (_kvm_get_dr(vcpu, dr, val)) { | |
767 | kvm_queue_exception(vcpu, UD_VECTOR); | |
768 | return 1; | |
769 | } | |
770 | return 0; | |
771 | } | |
020df079 GN |
772 | EXPORT_SYMBOL_GPL(kvm_get_dr); |
773 | ||
043405e1 CO |
774 | /* |
775 | * List of msr numbers which we expose to userspace through KVM_GET_MSRS | |
776 | * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST. | |
777 | * | |
778 | * This list is modified at module load time to reflect the | |
e3267cbb GC |
779 | * capabilities of the host cpu. This capabilities test skips MSRs that are |
780 | * kvm-specific. Those are put in the beginning of the list. | |
043405e1 | 781 | */ |
e3267cbb | 782 | |
11c6bffa | 783 | #define KVM_SAVE_MSRS_BEGIN 7 |
043405e1 | 784 | static u32 msrs_to_save[] = { |
e3267cbb | 785 | MSR_KVM_SYSTEM_TIME, MSR_KVM_WALL_CLOCK, |
11c6bffa | 786 | MSR_KVM_SYSTEM_TIME_NEW, MSR_KVM_WALL_CLOCK_NEW, |
55cd8e5a | 787 | HV_X64_MSR_GUEST_OS_ID, HV_X64_MSR_HYPERCALL, |
10388a07 | 788 | HV_X64_MSR_APIC_ASSIST_PAGE, |
043405e1 | 789 | MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP, |
8c06585d | 790 | MSR_STAR, |
043405e1 CO |
791 | #ifdef CONFIG_X86_64 |
792 | MSR_CSTAR, MSR_KERNEL_GS_BASE, MSR_SYSCALL_MASK, MSR_LSTAR, | |
793 | #endif | |
e90aa41e | 794 | MSR_IA32_TSC, MSR_IA32_CR_PAT, MSR_VM_HSAVE_PA |
043405e1 CO |
795 | }; |
796 | ||
797 | static unsigned num_msrs_to_save; | |
798 | ||
799 | static u32 emulated_msrs[] = { | |
800 | MSR_IA32_MISC_ENABLE, | |
908e75f3 AK |
801 | MSR_IA32_MCG_STATUS, |
802 | MSR_IA32_MCG_CTL, | |
043405e1 CO |
803 | }; |
804 | ||
b69e8cae | 805 | static int set_efer(struct kvm_vcpu *vcpu, u64 efer) |
15c4a640 | 806 | { |
aad82703 SY |
807 | u64 old_efer = vcpu->arch.efer; |
808 | ||
b69e8cae RJ |
809 | if (efer & efer_reserved_bits) |
810 | return 1; | |
15c4a640 CO |
811 | |
812 | if (is_paging(vcpu) | |
b69e8cae RJ |
813 | && (vcpu->arch.efer & EFER_LME) != (efer & EFER_LME)) |
814 | return 1; | |
15c4a640 | 815 | |
1b2fd70c AG |
816 | if (efer & EFER_FFXSR) { |
817 | struct kvm_cpuid_entry2 *feat; | |
818 | ||
819 | feat = kvm_find_cpuid_entry(vcpu, 0x80000001, 0); | |
b69e8cae RJ |
820 | if (!feat || !(feat->edx & bit(X86_FEATURE_FXSR_OPT))) |
821 | return 1; | |
1b2fd70c AG |
822 | } |
823 | ||
d8017474 AG |
824 | if (efer & EFER_SVME) { |
825 | struct kvm_cpuid_entry2 *feat; | |
826 | ||
827 | feat = kvm_find_cpuid_entry(vcpu, 0x80000001, 0); | |
b69e8cae RJ |
828 | if (!feat || !(feat->ecx & bit(X86_FEATURE_SVM))) |
829 | return 1; | |
d8017474 AG |
830 | } |
831 | ||
15c4a640 | 832 | efer &= ~EFER_LMA; |
f6801dff | 833 | efer |= vcpu->arch.efer & EFER_LMA; |
15c4a640 | 834 | |
a3d204e2 SY |
835 | kvm_x86_ops->set_efer(vcpu, efer); |
836 | ||
9645bb56 AK |
837 | vcpu->arch.mmu.base_role.nxe = (efer & EFER_NX) && !tdp_enabled; |
838 | kvm_mmu_reset_context(vcpu); | |
b69e8cae | 839 | |
aad82703 SY |
840 | /* Update reserved bits */ |
841 | if ((efer ^ old_efer) & EFER_NX) | |
842 | kvm_mmu_reset_context(vcpu); | |
843 | ||
b69e8cae | 844 | return 0; |
15c4a640 CO |
845 | } |
846 | ||
f2b4b7dd JR |
847 | void kvm_enable_efer_bits(u64 mask) |
848 | { | |
849 | efer_reserved_bits &= ~mask; | |
850 | } | |
851 | EXPORT_SYMBOL_GPL(kvm_enable_efer_bits); | |
852 | ||
853 | ||
15c4a640 CO |
854 | /* |
855 | * Writes msr value into into the appropriate "register". | |
856 | * Returns 0 on success, non-0 otherwise. | |
857 | * Assumes vcpu_load() was already called. | |
858 | */ | |
859 | int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data) | |
860 | { | |
861 | return kvm_x86_ops->set_msr(vcpu, msr_index, data); | |
862 | } | |
863 | ||
313a3dc7 CO |
864 | /* |
865 | * Adapt set_msr() to msr_io()'s calling convention | |
866 | */ | |
867 | static int do_set_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data) | |
868 | { | |
869 | return kvm_set_msr(vcpu, index, *data); | |
870 | } | |
871 | ||
18068523 GOC |
872 | static void kvm_write_wall_clock(struct kvm *kvm, gpa_t wall_clock) |
873 | { | |
9ed3c444 AK |
874 | int version; |
875 | int r; | |
50d0a0f9 | 876 | struct pvclock_wall_clock wc; |
923de3cf | 877 | struct timespec boot; |
18068523 GOC |
878 | |
879 | if (!wall_clock) | |
880 | return; | |
881 | ||
9ed3c444 AK |
882 | r = kvm_read_guest(kvm, wall_clock, &version, sizeof(version)); |
883 | if (r) | |
884 | return; | |
885 | ||
886 | if (version & 1) | |
887 | ++version; /* first time write, random junk */ | |
888 | ||
889 | ++version; | |
18068523 | 890 | |
18068523 GOC |
891 | kvm_write_guest(kvm, wall_clock, &version, sizeof(version)); |
892 | ||
50d0a0f9 GH |
893 | /* |
894 | * The guest calculates current wall clock time by adding | |
34c238a1 | 895 | * system time (updated by kvm_guest_time_update below) to the |
50d0a0f9 GH |
896 | * wall clock specified here. guest system time equals host |
897 | * system time for us, thus we must fill in host boot time here. | |
898 | */ | |
923de3cf | 899 | getboottime(&boot); |
50d0a0f9 GH |
900 | |
901 | wc.sec = boot.tv_sec; | |
902 | wc.nsec = boot.tv_nsec; | |
903 | wc.version = version; | |
18068523 GOC |
904 | |
905 | kvm_write_guest(kvm, wall_clock, &wc, sizeof(wc)); | |
906 | ||
907 | version++; | |
908 | kvm_write_guest(kvm, wall_clock, &version, sizeof(version)); | |
18068523 GOC |
909 | } |
910 | ||
50d0a0f9 GH |
911 | static uint32_t div_frac(uint32_t dividend, uint32_t divisor) |
912 | { | |
913 | uint32_t quotient, remainder; | |
914 | ||
915 | /* Don't try to replace with do_div(), this one calculates | |
916 | * "(dividend << 32) / divisor" */ | |
917 | __asm__ ( "divl %4" | |
918 | : "=a" (quotient), "=d" (remainder) | |
919 | : "0" (0), "1" (dividend), "r" (divisor) ); | |
920 | return quotient; | |
921 | } | |
922 | ||
5f4e3f88 ZA |
923 | static void kvm_get_time_scale(uint32_t scaled_khz, uint32_t base_khz, |
924 | s8 *pshift, u32 *pmultiplier) | |
50d0a0f9 | 925 | { |
5f4e3f88 | 926 | uint64_t scaled64; |
50d0a0f9 GH |
927 | int32_t shift = 0; |
928 | uint64_t tps64; | |
929 | uint32_t tps32; | |
930 | ||
5f4e3f88 ZA |
931 | tps64 = base_khz * 1000LL; |
932 | scaled64 = scaled_khz * 1000LL; | |
50933623 | 933 | while (tps64 > scaled64*2 || tps64 & 0xffffffff00000000ULL) { |
50d0a0f9 GH |
934 | tps64 >>= 1; |
935 | shift--; | |
936 | } | |
937 | ||
938 | tps32 = (uint32_t)tps64; | |
50933623 JK |
939 | while (tps32 <= scaled64 || scaled64 & 0xffffffff00000000ULL) { |
940 | if (scaled64 & 0xffffffff00000000ULL || tps32 & 0x80000000) | |
5f4e3f88 ZA |
941 | scaled64 >>= 1; |
942 | else | |
943 | tps32 <<= 1; | |
50d0a0f9 GH |
944 | shift++; |
945 | } | |
946 | ||
5f4e3f88 ZA |
947 | *pshift = shift; |
948 | *pmultiplier = div_frac(scaled64, tps32); | |
50d0a0f9 | 949 | |
5f4e3f88 ZA |
950 | pr_debug("%s: base_khz %u => %u, shift %d, mul %u\n", |
951 | __func__, base_khz, scaled_khz, shift, *pmultiplier); | |
50d0a0f9 GH |
952 | } |
953 | ||
759379dd ZA |
954 | static inline u64 get_kernel_ns(void) |
955 | { | |
956 | struct timespec ts; | |
957 | ||
958 | WARN_ON(preemptible()); | |
959 | ktime_get_ts(&ts); | |
960 | monotonic_to_bootbased(&ts); | |
961 | return timespec_to_ns(&ts); | |
50d0a0f9 GH |
962 | } |
963 | ||
c8076604 | 964 | static DEFINE_PER_CPU(unsigned long, cpu_tsc_khz); |
c285545f | 965 | unsigned long max_tsc_khz; |
c8076604 | 966 | |
8cfdc000 ZA |
967 | static inline int kvm_tsc_changes_freq(void) |
968 | { | |
969 | int cpu = get_cpu(); | |
970 | int ret = !boot_cpu_has(X86_FEATURE_CONSTANT_TSC) && | |
971 | cpufreq_quick_get(cpu) != 0; | |
972 | put_cpu(); | |
973 | return ret; | |
974 | } | |
975 | ||
759379dd ZA |
976 | static inline u64 nsec_to_cycles(u64 nsec) |
977 | { | |
217fc9cf AK |
978 | u64 ret; |
979 | ||
759379dd ZA |
980 | WARN_ON(preemptible()); |
981 | if (kvm_tsc_changes_freq()) | |
982 | printk_once(KERN_WARNING | |
983 | "kvm: unreliable cycle conversion on adjustable rate TSC\n"); | |
217fc9cf AK |
984 | ret = nsec * __get_cpu_var(cpu_tsc_khz); |
985 | do_div(ret, USEC_PER_SEC); | |
986 | return ret; | |
759379dd ZA |
987 | } |
988 | ||
c285545f ZA |
989 | static void kvm_arch_set_tsc_khz(struct kvm *kvm, u32 this_tsc_khz) |
990 | { | |
991 | /* Compute a scale to convert nanoseconds in TSC cycles */ | |
992 | kvm_get_time_scale(this_tsc_khz, NSEC_PER_SEC / 1000, | |
993 | &kvm->arch.virtual_tsc_shift, | |
994 | &kvm->arch.virtual_tsc_mult); | |
995 | kvm->arch.virtual_tsc_khz = this_tsc_khz; | |
996 | } | |
997 | ||
998 | static u64 compute_guest_tsc(struct kvm_vcpu *vcpu, s64 kernel_ns) | |
999 | { | |
1000 | u64 tsc = pvclock_scale_delta(kernel_ns-vcpu->arch.last_tsc_nsec, | |
1001 | vcpu->kvm->arch.virtual_tsc_mult, | |
1002 | vcpu->kvm->arch.virtual_tsc_shift); | |
1003 | tsc += vcpu->arch.last_tsc_write; | |
1004 | return tsc; | |
1005 | } | |
1006 | ||
99e3e30a ZA |
1007 | void kvm_write_tsc(struct kvm_vcpu *vcpu, u64 data) |
1008 | { | |
1009 | struct kvm *kvm = vcpu->kvm; | |
f38e098f | 1010 | u64 offset, ns, elapsed; |
99e3e30a | 1011 | unsigned long flags; |
46543ba4 | 1012 | s64 sdiff; |
99e3e30a ZA |
1013 | |
1014 | spin_lock_irqsave(&kvm->arch.tsc_write_lock, flags); | |
1015 | offset = data - native_read_tsc(); | |
759379dd | 1016 | ns = get_kernel_ns(); |
f38e098f | 1017 | elapsed = ns - kvm->arch.last_tsc_nsec; |
46543ba4 ZA |
1018 | sdiff = data - kvm->arch.last_tsc_write; |
1019 | if (sdiff < 0) | |
1020 | sdiff = -sdiff; | |
f38e098f ZA |
1021 | |
1022 | /* | |
46543ba4 | 1023 | * Special case: close write to TSC within 5 seconds of |
f38e098f | 1024 | * another CPU is interpreted as an attempt to synchronize |
46543ba4 ZA |
1025 | * The 5 seconds is to accomodate host load / swapping as |
1026 | * well as any reset of TSC during the boot process. | |
f38e098f ZA |
1027 | * |
1028 | * In that case, for a reliable TSC, we can match TSC offsets, | |
46543ba4 | 1029 | * or make a best guest using elapsed value. |
f38e098f | 1030 | */ |
46543ba4 ZA |
1031 | if (sdiff < nsec_to_cycles(5ULL * NSEC_PER_SEC) && |
1032 | elapsed < 5ULL * NSEC_PER_SEC) { | |
f38e098f ZA |
1033 | if (!check_tsc_unstable()) { |
1034 | offset = kvm->arch.last_tsc_offset; | |
1035 | pr_debug("kvm: matched tsc offset for %llu\n", data); | |
1036 | } else { | |
759379dd ZA |
1037 | u64 delta = nsec_to_cycles(elapsed); |
1038 | offset += delta; | |
1039 | pr_debug("kvm: adjusted tsc offset by %llu\n", delta); | |
f38e098f ZA |
1040 | } |
1041 | ns = kvm->arch.last_tsc_nsec; | |
1042 | } | |
1043 | kvm->arch.last_tsc_nsec = ns; | |
1044 | kvm->arch.last_tsc_write = data; | |
1045 | kvm->arch.last_tsc_offset = offset; | |
99e3e30a ZA |
1046 | kvm_x86_ops->write_tsc_offset(vcpu, offset); |
1047 | spin_unlock_irqrestore(&kvm->arch.tsc_write_lock, flags); | |
1048 | ||
1049 | /* Reset of TSC must disable overshoot protection below */ | |
1050 | vcpu->arch.hv_clock.tsc_timestamp = 0; | |
c285545f ZA |
1051 | vcpu->arch.last_tsc_write = data; |
1052 | vcpu->arch.last_tsc_nsec = ns; | |
99e3e30a ZA |
1053 | } |
1054 | EXPORT_SYMBOL_GPL(kvm_write_tsc); | |
1055 | ||
34c238a1 | 1056 | static int kvm_guest_time_update(struct kvm_vcpu *v) |
18068523 | 1057 | { |
18068523 GOC |
1058 | unsigned long flags; |
1059 | struct kvm_vcpu_arch *vcpu = &v->arch; | |
1060 | void *shared_kaddr; | |
463656c0 | 1061 | unsigned long this_tsc_khz; |
1d5f066e ZA |
1062 | s64 kernel_ns, max_kernel_ns; |
1063 | u64 tsc_timestamp; | |
18068523 | 1064 | |
18068523 GOC |
1065 | /* Keep irq disabled to prevent changes to the clock */ |
1066 | local_irq_save(flags); | |
1d5f066e | 1067 | kvm_get_msr(v, MSR_IA32_TSC, &tsc_timestamp); |
759379dd | 1068 | kernel_ns = get_kernel_ns(); |
8cfdc000 | 1069 | this_tsc_khz = __get_cpu_var(cpu_tsc_khz); |
18068523 | 1070 | |
8cfdc000 | 1071 | if (unlikely(this_tsc_khz == 0)) { |
c285545f | 1072 | local_irq_restore(flags); |
34c238a1 | 1073 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, v); |
8cfdc000 ZA |
1074 | return 1; |
1075 | } | |
18068523 | 1076 | |
c285545f ZA |
1077 | /* |
1078 | * We may have to catch up the TSC to match elapsed wall clock | |
1079 | * time for two reasons, even if kvmclock is used. | |
1080 | * 1) CPU could have been running below the maximum TSC rate | |
1081 | * 2) Broken TSC compensation resets the base at each VCPU | |
1082 | * entry to avoid unknown leaps of TSC even when running | |
1083 | * again on the same CPU. This may cause apparent elapsed | |
1084 | * time to disappear, and the guest to stand still or run | |
1085 | * very slowly. | |
1086 | */ | |
1087 | if (vcpu->tsc_catchup) { | |
1088 | u64 tsc = compute_guest_tsc(v, kernel_ns); | |
1089 | if (tsc > tsc_timestamp) { | |
1090 | kvm_x86_ops->adjust_tsc_offset(v, tsc - tsc_timestamp); | |
1091 | tsc_timestamp = tsc; | |
1092 | } | |
50d0a0f9 GH |
1093 | } |
1094 | ||
18068523 GOC |
1095 | local_irq_restore(flags); |
1096 | ||
c285545f ZA |
1097 | if (!vcpu->time_page) |
1098 | return 0; | |
18068523 | 1099 | |
1d5f066e ZA |
1100 | /* |
1101 | * Time as measured by the TSC may go backwards when resetting the base | |
1102 | * tsc_timestamp. The reason for this is that the TSC resolution is | |
1103 | * higher than the resolution of the other clock scales. Thus, many | |
1104 | * possible measurments of the TSC correspond to one measurement of any | |
1105 | * other clock, and so a spread of values is possible. This is not a | |
1106 | * problem for the computation of the nanosecond clock; with TSC rates | |
1107 | * around 1GHZ, there can only be a few cycles which correspond to one | |
1108 | * nanosecond value, and any path through this code will inevitably | |
1109 | * take longer than that. However, with the kernel_ns value itself, | |
1110 | * the precision may be much lower, down to HZ granularity. If the | |
1111 | * first sampling of TSC against kernel_ns ends in the low part of the | |
1112 | * range, and the second in the high end of the range, we can get: | |
1113 | * | |
1114 | * (TSC - offset_low) * S + kns_old > (TSC - offset_high) * S + kns_new | |
1115 | * | |
1116 | * As the sampling errors potentially range in the thousands of cycles, | |
1117 | * it is possible such a time value has already been observed by the | |
1118 | * guest. To protect against this, we must compute the system time as | |
1119 | * observed by the guest and ensure the new system time is greater. | |
1120 | */ | |
1121 | max_kernel_ns = 0; | |
1122 | if (vcpu->hv_clock.tsc_timestamp && vcpu->last_guest_tsc) { | |
1123 | max_kernel_ns = vcpu->last_guest_tsc - | |
1124 | vcpu->hv_clock.tsc_timestamp; | |
1125 | max_kernel_ns = pvclock_scale_delta(max_kernel_ns, | |
1126 | vcpu->hv_clock.tsc_to_system_mul, | |
1127 | vcpu->hv_clock.tsc_shift); | |
1128 | max_kernel_ns += vcpu->last_kernel_ns; | |
1129 | } | |
afbcf7ab | 1130 | |
e48672fa | 1131 | if (unlikely(vcpu->hw_tsc_khz != this_tsc_khz)) { |
5f4e3f88 ZA |
1132 | kvm_get_time_scale(NSEC_PER_SEC / 1000, this_tsc_khz, |
1133 | &vcpu->hv_clock.tsc_shift, | |
1134 | &vcpu->hv_clock.tsc_to_system_mul); | |
e48672fa | 1135 | vcpu->hw_tsc_khz = this_tsc_khz; |
8cfdc000 ZA |
1136 | } |
1137 | ||
1d5f066e ZA |
1138 | if (max_kernel_ns > kernel_ns) |
1139 | kernel_ns = max_kernel_ns; | |
1140 | ||
8cfdc000 | 1141 | /* With all the info we got, fill in the values */ |
1d5f066e | 1142 | vcpu->hv_clock.tsc_timestamp = tsc_timestamp; |
759379dd | 1143 | vcpu->hv_clock.system_time = kernel_ns + v->kvm->arch.kvmclock_offset; |
1d5f066e | 1144 | vcpu->last_kernel_ns = kernel_ns; |
28e4639a | 1145 | vcpu->last_guest_tsc = tsc_timestamp; |
371bcf64 GC |
1146 | vcpu->hv_clock.flags = 0; |
1147 | ||
18068523 GOC |
1148 | /* |
1149 | * The interface expects us to write an even number signaling that the | |
1150 | * update is finished. Since the guest won't see the intermediate | |
50d0a0f9 | 1151 | * state, we just increase by 2 at the end. |
18068523 | 1152 | */ |
50d0a0f9 | 1153 | vcpu->hv_clock.version += 2; |
18068523 GOC |
1154 | |
1155 | shared_kaddr = kmap_atomic(vcpu->time_page, KM_USER0); | |
1156 | ||
1157 | memcpy(shared_kaddr + vcpu->time_offset, &vcpu->hv_clock, | |
50d0a0f9 | 1158 | sizeof(vcpu->hv_clock)); |
18068523 GOC |
1159 | |
1160 | kunmap_atomic(shared_kaddr, KM_USER0); | |
1161 | ||
1162 | mark_page_dirty(v->kvm, vcpu->time >> PAGE_SHIFT); | |
8cfdc000 | 1163 | return 0; |
c8076604 GH |
1164 | } |
1165 | ||
9ba075a6 AK |
1166 | static bool msr_mtrr_valid(unsigned msr) |
1167 | { | |
1168 | switch (msr) { | |
1169 | case 0x200 ... 0x200 + 2 * KVM_NR_VAR_MTRR - 1: | |
1170 | case MSR_MTRRfix64K_00000: | |
1171 | case MSR_MTRRfix16K_80000: | |
1172 | case MSR_MTRRfix16K_A0000: | |
1173 | case MSR_MTRRfix4K_C0000: | |
1174 | case MSR_MTRRfix4K_C8000: | |
1175 | case MSR_MTRRfix4K_D0000: | |
1176 | case MSR_MTRRfix4K_D8000: | |
1177 | case MSR_MTRRfix4K_E0000: | |
1178 | case MSR_MTRRfix4K_E8000: | |
1179 | case MSR_MTRRfix4K_F0000: | |
1180 | case MSR_MTRRfix4K_F8000: | |
1181 | case MSR_MTRRdefType: | |
1182 | case MSR_IA32_CR_PAT: | |
1183 | return true; | |
1184 | case 0x2f8: | |
1185 | return true; | |
1186 | } | |
1187 | return false; | |
1188 | } | |
1189 | ||
d6289b93 MT |
1190 | static bool valid_pat_type(unsigned t) |
1191 | { | |
1192 | return t < 8 && (1 << t) & 0xf3; /* 0, 1, 4, 5, 6, 7 */ | |
1193 | } | |
1194 | ||
1195 | static bool valid_mtrr_type(unsigned t) | |
1196 | { | |
1197 | return t < 8 && (1 << t) & 0x73; /* 0, 1, 4, 5, 6 */ | |
1198 | } | |
1199 | ||
1200 | static bool mtrr_valid(struct kvm_vcpu *vcpu, u32 msr, u64 data) | |
1201 | { | |
1202 | int i; | |
1203 | ||
1204 | if (!msr_mtrr_valid(msr)) | |
1205 | return false; | |
1206 | ||
1207 | if (msr == MSR_IA32_CR_PAT) { | |
1208 | for (i = 0; i < 8; i++) | |
1209 | if (!valid_pat_type((data >> (i * 8)) & 0xff)) | |
1210 | return false; | |
1211 | return true; | |
1212 | } else if (msr == MSR_MTRRdefType) { | |
1213 | if (data & ~0xcff) | |
1214 | return false; | |
1215 | return valid_mtrr_type(data & 0xff); | |
1216 | } else if (msr >= MSR_MTRRfix64K_00000 && msr <= MSR_MTRRfix4K_F8000) { | |
1217 | for (i = 0; i < 8 ; i++) | |
1218 | if (!valid_mtrr_type((data >> (i * 8)) & 0xff)) | |
1219 | return false; | |
1220 | return true; | |
1221 | } | |
1222 | ||
1223 | /* variable MTRRs */ | |
1224 | return valid_mtrr_type(data & 0xff); | |
1225 | } | |
1226 | ||
9ba075a6 AK |
1227 | static int set_msr_mtrr(struct kvm_vcpu *vcpu, u32 msr, u64 data) |
1228 | { | |
0bed3b56 SY |
1229 | u64 *p = (u64 *)&vcpu->arch.mtrr_state.fixed_ranges; |
1230 | ||
d6289b93 | 1231 | if (!mtrr_valid(vcpu, msr, data)) |
9ba075a6 AK |
1232 | return 1; |
1233 | ||
0bed3b56 SY |
1234 | if (msr == MSR_MTRRdefType) { |
1235 | vcpu->arch.mtrr_state.def_type = data; | |
1236 | vcpu->arch.mtrr_state.enabled = (data & 0xc00) >> 10; | |
1237 | } else if (msr == MSR_MTRRfix64K_00000) | |
1238 | p[0] = data; | |
1239 | else if (msr == MSR_MTRRfix16K_80000 || msr == MSR_MTRRfix16K_A0000) | |
1240 | p[1 + msr - MSR_MTRRfix16K_80000] = data; | |
1241 | else if (msr >= MSR_MTRRfix4K_C0000 && msr <= MSR_MTRRfix4K_F8000) | |
1242 | p[3 + msr - MSR_MTRRfix4K_C0000] = data; | |
1243 | else if (msr == MSR_IA32_CR_PAT) | |
1244 | vcpu->arch.pat = data; | |
1245 | else { /* Variable MTRRs */ | |
1246 | int idx, is_mtrr_mask; | |
1247 | u64 *pt; | |
1248 | ||
1249 | idx = (msr - 0x200) / 2; | |
1250 | is_mtrr_mask = msr - 0x200 - 2 * idx; | |
1251 | if (!is_mtrr_mask) | |
1252 | pt = | |
1253 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].base_lo; | |
1254 | else | |
1255 | pt = | |
1256 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].mask_lo; | |
1257 | *pt = data; | |
1258 | } | |
1259 | ||
1260 | kvm_mmu_reset_context(vcpu); | |
9ba075a6 AK |
1261 | return 0; |
1262 | } | |
15c4a640 | 1263 | |
890ca9ae | 1264 | static int set_msr_mce(struct kvm_vcpu *vcpu, u32 msr, u64 data) |
15c4a640 | 1265 | { |
890ca9ae HY |
1266 | u64 mcg_cap = vcpu->arch.mcg_cap; |
1267 | unsigned bank_num = mcg_cap & 0xff; | |
1268 | ||
15c4a640 | 1269 | switch (msr) { |
15c4a640 | 1270 | case MSR_IA32_MCG_STATUS: |
890ca9ae | 1271 | vcpu->arch.mcg_status = data; |
15c4a640 | 1272 | break; |
c7ac679c | 1273 | case MSR_IA32_MCG_CTL: |
890ca9ae HY |
1274 | if (!(mcg_cap & MCG_CTL_P)) |
1275 | return 1; | |
1276 | if (data != 0 && data != ~(u64)0) | |
1277 | return -1; | |
1278 | vcpu->arch.mcg_ctl = data; | |
1279 | break; | |
1280 | default: | |
1281 | if (msr >= MSR_IA32_MC0_CTL && | |
1282 | msr < MSR_IA32_MC0_CTL + 4 * bank_num) { | |
1283 | u32 offset = msr - MSR_IA32_MC0_CTL; | |
114be429 AP |
1284 | /* only 0 or all 1s can be written to IA32_MCi_CTL |
1285 | * some Linux kernels though clear bit 10 in bank 4 to | |
1286 | * workaround a BIOS/GART TBL issue on AMD K8s, ignore | |
1287 | * this to avoid an uncatched #GP in the guest | |
1288 | */ | |
890ca9ae | 1289 | if ((offset & 0x3) == 0 && |
114be429 | 1290 | data != 0 && (data | (1 << 10)) != ~(u64)0) |
890ca9ae HY |
1291 | return -1; |
1292 | vcpu->arch.mce_banks[offset] = data; | |
1293 | break; | |
1294 | } | |
1295 | return 1; | |
1296 | } | |
1297 | return 0; | |
1298 | } | |
1299 | ||
ffde22ac ES |
1300 | static int xen_hvm_config(struct kvm_vcpu *vcpu, u64 data) |
1301 | { | |
1302 | struct kvm *kvm = vcpu->kvm; | |
1303 | int lm = is_long_mode(vcpu); | |
1304 | u8 *blob_addr = lm ? (u8 *)(long)kvm->arch.xen_hvm_config.blob_addr_64 | |
1305 | : (u8 *)(long)kvm->arch.xen_hvm_config.blob_addr_32; | |
1306 | u8 blob_size = lm ? kvm->arch.xen_hvm_config.blob_size_64 | |
1307 | : kvm->arch.xen_hvm_config.blob_size_32; | |
1308 | u32 page_num = data & ~PAGE_MASK; | |
1309 | u64 page_addr = data & PAGE_MASK; | |
1310 | u8 *page; | |
1311 | int r; | |
1312 | ||
1313 | r = -E2BIG; | |
1314 | if (page_num >= blob_size) | |
1315 | goto out; | |
1316 | r = -ENOMEM; | |
1317 | page = kzalloc(PAGE_SIZE, GFP_KERNEL); | |
1318 | if (!page) | |
1319 | goto out; | |
1320 | r = -EFAULT; | |
1321 | if (copy_from_user(page, blob_addr + (page_num * PAGE_SIZE), PAGE_SIZE)) | |
1322 | goto out_free; | |
1323 | if (kvm_write_guest(kvm, page_addr, page, PAGE_SIZE)) | |
1324 | goto out_free; | |
1325 | r = 0; | |
1326 | out_free: | |
1327 | kfree(page); | |
1328 | out: | |
1329 | return r; | |
1330 | } | |
1331 | ||
55cd8e5a GN |
1332 | static bool kvm_hv_hypercall_enabled(struct kvm *kvm) |
1333 | { | |
1334 | return kvm->arch.hv_hypercall & HV_X64_MSR_HYPERCALL_ENABLE; | |
1335 | } | |
1336 | ||
1337 | static bool kvm_hv_msr_partition_wide(u32 msr) | |
1338 | { | |
1339 | bool r = false; | |
1340 | switch (msr) { | |
1341 | case HV_X64_MSR_GUEST_OS_ID: | |
1342 | case HV_X64_MSR_HYPERCALL: | |
1343 | r = true; | |
1344 | break; | |
1345 | } | |
1346 | ||
1347 | return r; | |
1348 | } | |
1349 | ||
1350 | static int set_msr_hyperv_pw(struct kvm_vcpu *vcpu, u32 msr, u64 data) | |
1351 | { | |
1352 | struct kvm *kvm = vcpu->kvm; | |
1353 | ||
1354 | switch (msr) { | |
1355 | case HV_X64_MSR_GUEST_OS_ID: | |
1356 | kvm->arch.hv_guest_os_id = data; | |
1357 | /* setting guest os id to zero disables hypercall page */ | |
1358 | if (!kvm->arch.hv_guest_os_id) | |
1359 | kvm->arch.hv_hypercall &= ~HV_X64_MSR_HYPERCALL_ENABLE; | |
1360 | break; | |
1361 | case HV_X64_MSR_HYPERCALL: { | |
1362 | u64 gfn; | |
1363 | unsigned long addr; | |
1364 | u8 instructions[4]; | |
1365 | ||
1366 | /* if guest os id is not set hypercall should remain disabled */ | |
1367 | if (!kvm->arch.hv_guest_os_id) | |
1368 | break; | |
1369 | if (!(data & HV_X64_MSR_HYPERCALL_ENABLE)) { | |
1370 | kvm->arch.hv_hypercall = data; | |
1371 | break; | |
1372 | } | |
1373 | gfn = data >> HV_X64_MSR_HYPERCALL_PAGE_ADDRESS_SHIFT; | |
1374 | addr = gfn_to_hva(kvm, gfn); | |
1375 | if (kvm_is_error_hva(addr)) | |
1376 | return 1; | |
1377 | kvm_x86_ops->patch_hypercall(vcpu, instructions); | |
1378 | ((unsigned char *)instructions)[3] = 0xc3; /* ret */ | |
1379 | if (copy_to_user((void __user *)addr, instructions, 4)) | |
1380 | return 1; | |
1381 | kvm->arch.hv_hypercall = data; | |
1382 | break; | |
1383 | } | |
1384 | default: | |
1385 | pr_unimpl(vcpu, "HYPER-V unimplemented wrmsr: 0x%x " | |
1386 | "data 0x%llx\n", msr, data); | |
1387 | return 1; | |
1388 | } | |
1389 | return 0; | |
1390 | } | |
1391 | ||
1392 | static int set_msr_hyperv(struct kvm_vcpu *vcpu, u32 msr, u64 data) | |
1393 | { | |
10388a07 GN |
1394 | switch (msr) { |
1395 | case HV_X64_MSR_APIC_ASSIST_PAGE: { | |
1396 | unsigned long addr; | |
55cd8e5a | 1397 | |
10388a07 GN |
1398 | if (!(data & HV_X64_MSR_APIC_ASSIST_PAGE_ENABLE)) { |
1399 | vcpu->arch.hv_vapic = data; | |
1400 | break; | |
1401 | } | |
1402 | addr = gfn_to_hva(vcpu->kvm, data >> | |
1403 | HV_X64_MSR_APIC_ASSIST_PAGE_ADDRESS_SHIFT); | |
1404 | if (kvm_is_error_hva(addr)) | |
1405 | return 1; | |
1406 | if (clear_user((void __user *)addr, PAGE_SIZE)) | |
1407 | return 1; | |
1408 | vcpu->arch.hv_vapic = data; | |
1409 | break; | |
1410 | } | |
1411 | case HV_X64_MSR_EOI: | |
1412 | return kvm_hv_vapic_msr_write(vcpu, APIC_EOI, data); | |
1413 | case HV_X64_MSR_ICR: | |
1414 | return kvm_hv_vapic_msr_write(vcpu, APIC_ICR, data); | |
1415 | case HV_X64_MSR_TPR: | |
1416 | return kvm_hv_vapic_msr_write(vcpu, APIC_TASKPRI, data); | |
1417 | default: | |
1418 | pr_unimpl(vcpu, "HYPER-V unimplemented wrmsr: 0x%x " | |
1419 | "data 0x%llx\n", msr, data); | |
1420 | return 1; | |
1421 | } | |
1422 | ||
1423 | return 0; | |
55cd8e5a GN |
1424 | } |
1425 | ||
15c4a640 CO |
1426 | int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data) |
1427 | { | |
1428 | switch (msr) { | |
15c4a640 | 1429 | case MSR_EFER: |
b69e8cae | 1430 | return set_efer(vcpu, data); |
8f1589d9 AP |
1431 | case MSR_K7_HWCR: |
1432 | data &= ~(u64)0x40; /* ignore flush filter disable */ | |
82494028 | 1433 | data &= ~(u64)0x100; /* ignore ignne emulation enable */ |
8f1589d9 AP |
1434 | if (data != 0) { |
1435 | pr_unimpl(vcpu, "unimplemented HWCR wrmsr: 0x%llx\n", | |
1436 | data); | |
1437 | return 1; | |
1438 | } | |
15c4a640 | 1439 | break; |
f7c6d140 AP |
1440 | case MSR_FAM10H_MMIO_CONF_BASE: |
1441 | if (data != 0) { | |
1442 | pr_unimpl(vcpu, "unimplemented MMIO_CONF_BASE wrmsr: " | |
1443 | "0x%llx\n", data); | |
1444 | return 1; | |
1445 | } | |
15c4a640 | 1446 | break; |
c323c0e5 | 1447 | case MSR_AMD64_NB_CFG: |
c7ac679c | 1448 | break; |
b5e2fec0 AG |
1449 | case MSR_IA32_DEBUGCTLMSR: |
1450 | if (!data) { | |
1451 | /* We support the non-activated case already */ | |
1452 | break; | |
1453 | } else if (data & ~(DEBUGCTLMSR_LBR | DEBUGCTLMSR_BTF)) { | |
1454 | /* Values other than LBR and BTF are vendor-specific, | |
1455 | thus reserved and should throw a #GP */ | |
1456 | return 1; | |
1457 | } | |
1458 | pr_unimpl(vcpu, "%s: MSR_IA32_DEBUGCTLMSR 0x%llx, nop\n", | |
1459 | __func__, data); | |
1460 | break; | |
15c4a640 CO |
1461 | case MSR_IA32_UCODE_REV: |
1462 | case MSR_IA32_UCODE_WRITE: | |
61a6bd67 | 1463 | case MSR_VM_HSAVE_PA: |
6098ca93 | 1464 | case MSR_AMD64_PATCH_LOADER: |
15c4a640 | 1465 | break; |
9ba075a6 AK |
1466 | case 0x200 ... 0x2ff: |
1467 | return set_msr_mtrr(vcpu, msr, data); | |
15c4a640 CO |
1468 | case MSR_IA32_APICBASE: |
1469 | kvm_set_apic_base(vcpu, data); | |
1470 | break; | |
0105d1a5 GN |
1471 | case APIC_BASE_MSR ... APIC_BASE_MSR + 0x3ff: |
1472 | return kvm_x2apic_msr_write(vcpu, msr, data); | |
15c4a640 | 1473 | case MSR_IA32_MISC_ENABLE: |
ad312c7c | 1474 | vcpu->arch.ia32_misc_enable_msr = data; |
15c4a640 | 1475 | break; |
11c6bffa | 1476 | case MSR_KVM_WALL_CLOCK_NEW: |
18068523 GOC |
1477 | case MSR_KVM_WALL_CLOCK: |
1478 | vcpu->kvm->arch.wall_clock = data; | |
1479 | kvm_write_wall_clock(vcpu->kvm, data); | |
1480 | break; | |
11c6bffa | 1481 | case MSR_KVM_SYSTEM_TIME_NEW: |
18068523 GOC |
1482 | case MSR_KVM_SYSTEM_TIME: { |
1483 | if (vcpu->arch.time_page) { | |
1484 | kvm_release_page_dirty(vcpu->arch.time_page); | |
1485 | vcpu->arch.time_page = NULL; | |
1486 | } | |
1487 | ||
1488 | vcpu->arch.time = data; | |
c285545f | 1489 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
18068523 GOC |
1490 | |
1491 | /* we verify if the enable bit is set... */ | |
1492 | if (!(data & 1)) | |
1493 | break; | |
1494 | ||
1495 | /* ...but clean it before doing the actual write */ | |
1496 | vcpu->arch.time_offset = data & ~(PAGE_MASK | 1); | |
1497 | ||
18068523 GOC |
1498 | vcpu->arch.time_page = |
1499 | gfn_to_page(vcpu->kvm, data >> PAGE_SHIFT); | |
18068523 GOC |
1500 | |
1501 | if (is_error_page(vcpu->arch.time_page)) { | |
1502 | kvm_release_page_clean(vcpu->arch.time_page); | |
1503 | vcpu->arch.time_page = NULL; | |
1504 | } | |
18068523 GOC |
1505 | break; |
1506 | } | |
890ca9ae HY |
1507 | case MSR_IA32_MCG_CTL: |
1508 | case MSR_IA32_MCG_STATUS: | |
1509 | case MSR_IA32_MC0_CTL ... MSR_IA32_MC0_CTL + 4 * KVM_MAX_MCE_BANKS - 1: | |
1510 | return set_msr_mce(vcpu, msr, data); | |
71db6023 AP |
1511 | |
1512 | /* Performance counters are not protected by a CPUID bit, | |
1513 | * so we should check all of them in the generic path for the sake of | |
1514 | * cross vendor migration. | |
1515 | * Writing a zero into the event select MSRs disables them, | |
1516 | * which we perfectly emulate ;-). Any other value should be at least | |
1517 | * reported, some guests depend on them. | |
1518 | */ | |
1519 | case MSR_P6_EVNTSEL0: | |
1520 | case MSR_P6_EVNTSEL1: | |
1521 | case MSR_K7_EVNTSEL0: | |
1522 | case MSR_K7_EVNTSEL1: | |
1523 | case MSR_K7_EVNTSEL2: | |
1524 | case MSR_K7_EVNTSEL3: | |
1525 | if (data != 0) | |
1526 | pr_unimpl(vcpu, "unimplemented perfctr wrmsr: " | |
1527 | "0x%x data 0x%llx\n", msr, data); | |
1528 | break; | |
1529 | /* at least RHEL 4 unconditionally writes to the perfctr registers, | |
1530 | * so we ignore writes to make it happy. | |
1531 | */ | |
1532 | case MSR_P6_PERFCTR0: | |
1533 | case MSR_P6_PERFCTR1: | |
1534 | case MSR_K7_PERFCTR0: | |
1535 | case MSR_K7_PERFCTR1: | |
1536 | case MSR_K7_PERFCTR2: | |
1537 | case MSR_K7_PERFCTR3: | |
1538 | pr_unimpl(vcpu, "unimplemented perfctr wrmsr: " | |
1539 | "0x%x data 0x%llx\n", msr, data); | |
1540 | break; | |
84e0cefa JS |
1541 | case MSR_K7_CLK_CTL: |
1542 | /* | |
1543 | * Ignore all writes to this no longer documented MSR. | |
1544 | * Writes are only relevant for old K7 processors, | |
1545 | * all pre-dating SVM, but a recommended workaround from | |
1546 | * AMD for these chips. It is possible to speicify the | |
1547 | * affected processor models on the command line, hence | |
1548 | * the need to ignore the workaround. | |
1549 | */ | |
1550 | break; | |
55cd8e5a GN |
1551 | case HV_X64_MSR_GUEST_OS_ID ... HV_X64_MSR_SINT15: |
1552 | if (kvm_hv_msr_partition_wide(msr)) { | |
1553 | int r; | |
1554 | mutex_lock(&vcpu->kvm->lock); | |
1555 | r = set_msr_hyperv_pw(vcpu, msr, data); | |
1556 | mutex_unlock(&vcpu->kvm->lock); | |
1557 | return r; | |
1558 | } else | |
1559 | return set_msr_hyperv(vcpu, msr, data); | |
1560 | break; | |
15c4a640 | 1561 | default: |
ffde22ac ES |
1562 | if (msr && (msr == vcpu->kvm->arch.xen_hvm_config.msr)) |
1563 | return xen_hvm_config(vcpu, data); | |
ed85c068 AP |
1564 | if (!ignore_msrs) { |
1565 | pr_unimpl(vcpu, "unhandled wrmsr: 0x%x data %llx\n", | |
1566 | msr, data); | |
1567 | return 1; | |
1568 | } else { | |
1569 | pr_unimpl(vcpu, "ignored wrmsr: 0x%x data %llx\n", | |
1570 | msr, data); | |
1571 | break; | |
1572 | } | |
15c4a640 CO |
1573 | } |
1574 | return 0; | |
1575 | } | |
1576 | EXPORT_SYMBOL_GPL(kvm_set_msr_common); | |
1577 | ||
1578 | ||
1579 | /* | |
1580 | * Reads an msr value (of 'msr_index') into 'pdata'. | |
1581 | * Returns 0 on success, non-0 otherwise. | |
1582 | * Assumes vcpu_load() was already called. | |
1583 | */ | |
1584 | int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata) | |
1585 | { | |
1586 | return kvm_x86_ops->get_msr(vcpu, msr_index, pdata); | |
1587 | } | |
1588 | ||
9ba075a6 AK |
1589 | static int get_msr_mtrr(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
1590 | { | |
0bed3b56 SY |
1591 | u64 *p = (u64 *)&vcpu->arch.mtrr_state.fixed_ranges; |
1592 | ||
9ba075a6 AK |
1593 | if (!msr_mtrr_valid(msr)) |
1594 | return 1; | |
1595 | ||
0bed3b56 SY |
1596 | if (msr == MSR_MTRRdefType) |
1597 | *pdata = vcpu->arch.mtrr_state.def_type + | |
1598 | (vcpu->arch.mtrr_state.enabled << 10); | |
1599 | else if (msr == MSR_MTRRfix64K_00000) | |
1600 | *pdata = p[0]; | |
1601 | else if (msr == MSR_MTRRfix16K_80000 || msr == MSR_MTRRfix16K_A0000) | |
1602 | *pdata = p[1 + msr - MSR_MTRRfix16K_80000]; | |
1603 | else if (msr >= MSR_MTRRfix4K_C0000 && msr <= MSR_MTRRfix4K_F8000) | |
1604 | *pdata = p[3 + msr - MSR_MTRRfix4K_C0000]; | |
1605 | else if (msr == MSR_IA32_CR_PAT) | |
1606 | *pdata = vcpu->arch.pat; | |
1607 | else { /* Variable MTRRs */ | |
1608 | int idx, is_mtrr_mask; | |
1609 | u64 *pt; | |
1610 | ||
1611 | idx = (msr - 0x200) / 2; | |
1612 | is_mtrr_mask = msr - 0x200 - 2 * idx; | |
1613 | if (!is_mtrr_mask) | |
1614 | pt = | |
1615 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].base_lo; | |
1616 | else | |
1617 | pt = | |
1618 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].mask_lo; | |
1619 | *pdata = *pt; | |
1620 | } | |
1621 | ||
9ba075a6 AK |
1622 | return 0; |
1623 | } | |
1624 | ||
890ca9ae | 1625 | static int get_msr_mce(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
15c4a640 CO |
1626 | { |
1627 | u64 data; | |
890ca9ae HY |
1628 | u64 mcg_cap = vcpu->arch.mcg_cap; |
1629 | unsigned bank_num = mcg_cap & 0xff; | |
15c4a640 CO |
1630 | |
1631 | switch (msr) { | |
15c4a640 CO |
1632 | case MSR_IA32_P5_MC_ADDR: |
1633 | case MSR_IA32_P5_MC_TYPE: | |
890ca9ae HY |
1634 | data = 0; |
1635 | break; | |
15c4a640 | 1636 | case MSR_IA32_MCG_CAP: |
890ca9ae HY |
1637 | data = vcpu->arch.mcg_cap; |
1638 | break; | |
c7ac679c | 1639 | case MSR_IA32_MCG_CTL: |
890ca9ae HY |
1640 | if (!(mcg_cap & MCG_CTL_P)) |
1641 | return 1; | |
1642 | data = vcpu->arch.mcg_ctl; | |
1643 | break; | |
1644 | case MSR_IA32_MCG_STATUS: | |
1645 | data = vcpu->arch.mcg_status; | |
1646 | break; | |
1647 | default: | |
1648 | if (msr >= MSR_IA32_MC0_CTL && | |
1649 | msr < MSR_IA32_MC0_CTL + 4 * bank_num) { | |
1650 | u32 offset = msr - MSR_IA32_MC0_CTL; | |
1651 | data = vcpu->arch.mce_banks[offset]; | |
1652 | break; | |
1653 | } | |
1654 | return 1; | |
1655 | } | |
1656 | *pdata = data; | |
1657 | return 0; | |
1658 | } | |
1659 | ||
55cd8e5a GN |
1660 | static int get_msr_hyperv_pw(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
1661 | { | |
1662 | u64 data = 0; | |
1663 | struct kvm *kvm = vcpu->kvm; | |
1664 | ||
1665 | switch (msr) { | |
1666 | case HV_X64_MSR_GUEST_OS_ID: | |
1667 | data = kvm->arch.hv_guest_os_id; | |
1668 | break; | |
1669 | case HV_X64_MSR_HYPERCALL: | |
1670 | data = kvm->arch.hv_hypercall; | |
1671 | break; | |
1672 | default: | |
1673 | pr_unimpl(vcpu, "Hyper-V unhandled rdmsr: 0x%x\n", msr); | |
1674 | return 1; | |
1675 | } | |
1676 | ||
1677 | *pdata = data; | |
1678 | return 0; | |
1679 | } | |
1680 | ||
1681 | static int get_msr_hyperv(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) | |
1682 | { | |
1683 | u64 data = 0; | |
1684 | ||
1685 | switch (msr) { | |
1686 | case HV_X64_MSR_VP_INDEX: { | |
1687 | int r; | |
1688 | struct kvm_vcpu *v; | |
1689 | kvm_for_each_vcpu(r, v, vcpu->kvm) | |
1690 | if (v == vcpu) | |
1691 | data = r; | |
1692 | break; | |
1693 | } | |
10388a07 GN |
1694 | case HV_X64_MSR_EOI: |
1695 | return kvm_hv_vapic_msr_read(vcpu, APIC_EOI, pdata); | |
1696 | case HV_X64_MSR_ICR: | |
1697 | return kvm_hv_vapic_msr_read(vcpu, APIC_ICR, pdata); | |
1698 | case HV_X64_MSR_TPR: | |
1699 | return kvm_hv_vapic_msr_read(vcpu, APIC_TASKPRI, pdata); | |
55cd8e5a GN |
1700 | default: |
1701 | pr_unimpl(vcpu, "Hyper-V unhandled rdmsr: 0x%x\n", msr); | |
1702 | return 1; | |
1703 | } | |
1704 | *pdata = data; | |
1705 | return 0; | |
1706 | } | |
1707 | ||
890ca9ae HY |
1708 | int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
1709 | { | |
1710 | u64 data; | |
1711 | ||
1712 | switch (msr) { | |
890ca9ae | 1713 | case MSR_IA32_PLATFORM_ID: |
15c4a640 | 1714 | case MSR_IA32_UCODE_REV: |
15c4a640 | 1715 | case MSR_IA32_EBL_CR_POWERON: |
b5e2fec0 AG |
1716 | case MSR_IA32_DEBUGCTLMSR: |
1717 | case MSR_IA32_LASTBRANCHFROMIP: | |
1718 | case MSR_IA32_LASTBRANCHTOIP: | |
1719 | case MSR_IA32_LASTINTFROMIP: | |
1720 | case MSR_IA32_LASTINTTOIP: | |
60af2ecd JSR |
1721 | case MSR_K8_SYSCFG: |
1722 | case MSR_K7_HWCR: | |
61a6bd67 | 1723 | case MSR_VM_HSAVE_PA: |
1f3ee616 AS |
1724 | case MSR_P6_PERFCTR0: |
1725 | case MSR_P6_PERFCTR1: | |
7fe29e0f AS |
1726 | case MSR_P6_EVNTSEL0: |
1727 | case MSR_P6_EVNTSEL1: | |
9e699624 | 1728 | case MSR_K7_EVNTSEL0: |
1f3ee616 | 1729 | case MSR_K7_PERFCTR0: |
1fdbd48c | 1730 | case MSR_K8_INT_PENDING_MSG: |
c323c0e5 | 1731 | case MSR_AMD64_NB_CFG: |
f7c6d140 | 1732 | case MSR_FAM10H_MMIO_CONF_BASE: |
15c4a640 CO |
1733 | data = 0; |
1734 | break; | |
9ba075a6 AK |
1735 | case MSR_MTRRcap: |
1736 | data = 0x500 | KVM_NR_VAR_MTRR; | |
1737 | break; | |
1738 | case 0x200 ... 0x2ff: | |
1739 | return get_msr_mtrr(vcpu, msr, pdata); | |
15c4a640 CO |
1740 | case 0xcd: /* fsb frequency */ |
1741 | data = 3; | |
1742 | break; | |
7b914098 JS |
1743 | /* |
1744 | * MSR_EBC_FREQUENCY_ID | |
1745 | * Conservative value valid for even the basic CPU models. | |
1746 | * Models 0,1: 000 in bits 23:21 indicating a bus speed of | |
1747 | * 100MHz, model 2 000 in bits 18:16 indicating 100MHz, | |
1748 | * and 266MHz for model 3, or 4. Set Core Clock | |
1749 | * Frequency to System Bus Frequency Ratio to 1 (bits | |
1750 | * 31:24) even though these are only valid for CPU | |
1751 | * models > 2, however guests may end up dividing or | |
1752 | * multiplying by zero otherwise. | |
1753 | */ | |
1754 | case MSR_EBC_FREQUENCY_ID: | |
1755 | data = 1 << 24; | |
1756 | break; | |
15c4a640 CO |
1757 | case MSR_IA32_APICBASE: |
1758 | data = kvm_get_apic_base(vcpu); | |
1759 | break; | |
0105d1a5 GN |
1760 | case APIC_BASE_MSR ... APIC_BASE_MSR + 0x3ff: |
1761 | return kvm_x2apic_msr_read(vcpu, msr, pdata); | |
1762 | break; | |
15c4a640 | 1763 | case MSR_IA32_MISC_ENABLE: |
ad312c7c | 1764 | data = vcpu->arch.ia32_misc_enable_msr; |
15c4a640 | 1765 | break; |
847f0ad8 AG |
1766 | case MSR_IA32_PERF_STATUS: |
1767 | /* TSC increment by tick */ | |
1768 | data = 1000ULL; | |
1769 | /* CPU multiplier */ | |
1770 | data |= (((uint64_t)4ULL) << 40); | |
1771 | break; | |
15c4a640 | 1772 | case MSR_EFER: |
f6801dff | 1773 | data = vcpu->arch.efer; |
15c4a640 | 1774 | break; |
18068523 | 1775 | case MSR_KVM_WALL_CLOCK: |
11c6bffa | 1776 | case MSR_KVM_WALL_CLOCK_NEW: |
18068523 GOC |
1777 | data = vcpu->kvm->arch.wall_clock; |
1778 | break; | |
1779 | case MSR_KVM_SYSTEM_TIME: | |
11c6bffa | 1780 | case MSR_KVM_SYSTEM_TIME_NEW: |
18068523 GOC |
1781 | data = vcpu->arch.time; |
1782 | break; | |
890ca9ae HY |
1783 | case MSR_IA32_P5_MC_ADDR: |
1784 | case MSR_IA32_P5_MC_TYPE: | |
1785 | case MSR_IA32_MCG_CAP: | |
1786 | case MSR_IA32_MCG_CTL: | |
1787 | case MSR_IA32_MCG_STATUS: | |
1788 | case MSR_IA32_MC0_CTL ... MSR_IA32_MC0_CTL + 4 * KVM_MAX_MCE_BANKS - 1: | |
1789 | return get_msr_mce(vcpu, msr, pdata); | |
84e0cefa JS |
1790 | case MSR_K7_CLK_CTL: |
1791 | /* | |
1792 | * Provide expected ramp-up count for K7. All other | |
1793 | * are set to zero, indicating minimum divisors for | |
1794 | * every field. | |
1795 | * | |
1796 | * This prevents guest kernels on AMD host with CPU | |
1797 | * type 6, model 8 and higher from exploding due to | |
1798 | * the rdmsr failing. | |
1799 | */ | |
1800 | data = 0x20000000; | |
1801 | break; | |
55cd8e5a GN |
1802 | case HV_X64_MSR_GUEST_OS_ID ... HV_X64_MSR_SINT15: |
1803 | if (kvm_hv_msr_partition_wide(msr)) { | |
1804 | int r; | |
1805 | mutex_lock(&vcpu->kvm->lock); | |
1806 | r = get_msr_hyperv_pw(vcpu, msr, pdata); | |
1807 | mutex_unlock(&vcpu->kvm->lock); | |
1808 | return r; | |
1809 | } else | |
1810 | return get_msr_hyperv(vcpu, msr, pdata); | |
1811 | break; | |
15c4a640 | 1812 | default: |
ed85c068 AP |
1813 | if (!ignore_msrs) { |
1814 | pr_unimpl(vcpu, "unhandled rdmsr: 0x%x\n", msr); | |
1815 | return 1; | |
1816 | } else { | |
1817 | pr_unimpl(vcpu, "ignored rdmsr: 0x%x\n", msr); | |
1818 | data = 0; | |
1819 | } | |
1820 | break; | |
15c4a640 CO |
1821 | } |
1822 | *pdata = data; | |
1823 | return 0; | |
1824 | } | |
1825 | EXPORT_SYMBOL_GPL(kvm_get_msr_common); | |
1826 | ||
313a3dc7 CO |
1827 | /* |
1828 | * Read or write a bunch of msrs. All parameters are kernel addresses. | |
1829 | * | |
1830 | * @return number of msrs set successfully. | |
1831 | */ | |
1832 | static int __msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs *msrs, | |
1833 | struct kvm_msr_entry *entries, | |
1834 | int (*do_msr)(struct kvm_vcpu *vcpu, | |
1835 | unsigned index, u64 *data)) | |
1836 | { | |
f656ce01 | 1837 | int i, idx; |
313a3dc7 | 1838 | |
f656ce01 | 1839 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
313a3dc7 CO |
1840 | for (i = 0; i < msrs->nmsrs; ++i) |
1841 | if (do_msr(vcpu, entries[i].index, &entries[i].data)) | |
1842 | break; | |
f656ce01 | 1843 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
313a3dc7 | 1844 | |
313a3dc7 CO |
1845 | return i; |
1846 | } | |
1847 | ||
1848 | /* | |
1849 | * Read or write a bunch of msrs. Parameters are user addresses. | |
1850 | * | |
1851 | * @return number of msrs set successfully. | |
1852 | */ | |
1853 | static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs, | |
1854 | int (*do_msr)(struct kvm_vcpu *vcpu, | |
1855 | unsigned index, u64 *data), | |
1856 | int writeback) | |
1857 | { | |
1858 | struct kvm_msrs msrs; | |
1859 | struct kvm_msr_entry *entries; | |
1860 | int r, n; | |
1861 | unsigned size; | |
1862 | ||
1863 | r = -EFAULT; | |
1864 | if (copy_from_user(&msrs, user_msrs, sizeof msrs)) | |
1865 | goto out; | |
1866 | ||
1867 | r = -E2BIG; | |
1868 | if (msrs.nmsrs >= MAX_IO_MSRS) | |
1869 | goto out; | |
1870 | ||
1871 | r = -ENOMEM; | |
1872 | size = sizeof(struct kvm_msr_entry) * msrs.nmsrs; | |
7a73c028 | 1873 | entries = kmalloc(size, GFP_KERNEL); |
313a3dc7 CO |
1874 | if (!entries) |
1875 | goto out; | |
1876 | ||
1877 | r = -EFAULT; | |
1878 | if (copy_from_user(entries, user_msrs->entries, size)) | |
1879 | goto out_free; | |
1880 | ||
1881 | r = n = __msr_io(vcpu, &msrs, entries, do_msr); | |
1882 | if (r < 0) | |
1883 | goto out_free; | |
1884 | ||
1885 | r = -EFAULT; | |
1886 | if (writeback && copy_to_user(user_msrs->entries, entries, size)) | |
1887 | goto out_free; | |
1888 | ||
1889 | r = n; | |
1890 | ||
1891 | out_free: | |
7a73c028 | 1892 | kfree(entries); |
313a3dc7 CO |
1893 | out: |
1894 | return r; | |
1895 | } | |
1896 | ||
018d00d2 ZX |
1897 | int kvm_dev_ioctl_check_extension(long ext) |
1898 | { | |
1899 | int r; | |
1900 | ||
1901 | switch (ext) { | |
1902 | case KVM_CAP_IRQCHIP: | |
1903 | case KVM_CAP_HLT: | |
1904 | case KVM_CAP_MMU_SHADOW_CACHE_CONTROL: | |
018d00d2 | 1905 | case KVM_CAP_SET_TSS_ADDR: |
07716717 | 1906 | case KVM_CAP_EXT_CPUID: |
c8076604 | 1907 | case KVM_CAP_CLOCKSOURCE: |
7837699f | 1908 | case KVM_CAP_PIT: |
a28e4f5a | 1909 | case KVM_CAP_NOP_IO_DELAY: |
62d9f0db | 1910 | case KVM_CAP_MP_STATE: |
ed848624 | 1911 | case KVM_CAP_SYNC_MMU: |
52d939a0 | 1912 | case KVM_CAP_REINJECT_CONTROL: |
4925663a | 1913 | case KVM_CAP_IRQ_INJECT_STATUS: |
e56d532f | 1914 | case KVM_CAP_ASSIGN_DEV_IRQ: |
721eecbf | 1915 | case KVM_CAP_IRQFD: |
d34e6b17 | 1916 | case KVM_CAP_IOEVENTFD: |
c5ff41ce | 1917 | case KVM_CAP_PIT2: |
e9f42757 | 1918 | case KVM_CAP_PIT_STATE2: |
b927a3ce | 1919 | case KVM_CAP_SET_IDENTITY_MAP_ADDR: |
ffde22ac | 1920 | case KVM_CAP_XEN_HVM: |
afbcf7ab | 1921 | case KVM_CAP_ADJUST_CLOCK: |
3cfc3092 | 1922 | case KVM_CAP_VCPU_EVENTS: |
55cd8e5a | 1923 | case KVM_CAP_HYPERV: |
10388a07 | 1924 | case KVM_CAP_HYPERV_VAPIC: |
c25bc163 | 1925 | case KVM_CAP_HYPERV_SPIN: |
ab9f4ecb | 1926 | case KVM_CAP_PCI_SEGMENT: |
a1efbe77 | 1927 | case KVM_CAP_DEBUGREGS: |
d2be1651 | 1928 | case KVM_CAP_X86_ROBUST_SINGLESTEP: |
2d5b5a66 | 1929 | case KVM_CAP_XSAVE: |
018d00d2 ZX |
1930 | r = 1; |
1931 | break; | |
542472b5 LV |
1932 | case KVM_CAP_COALESCED_MMIO: |
1933 | r = KVM_COALESCED_MMIO_PAGE_OFFSET; | |
1934 | break; | |
774ead3a AK |
1935 | case KVM_CAP_VAPIC: |
1936 | r = !kvm_x86_ops->cpu_has_accelerated_tpr(); | |
1937 | break; | |
f725230a AK |
1938 | case KVM_CAP_NR_VCPUS: |
1939 | r = KVM_MAX_VCPUS; | |
1940 | break; | |
a988b910 AK |
1941 | case KVM_CAP_NR_MEMSLOTS: |
1942 | r = KVM_MEMORY_SLOTS; | |
1943 | break; | |
a68a6a72 MT |
1944 | case KVM_CAP_PV_MMU: /* obsolete */ |
1945 | r = 0; | |
2f333bcb | 1946 | break; |
62c476c7 | 1947 | case KVM_CAP_IOMMU: |
19de40a8 | 1948 | r = iommu_found(); |
62c476c7 | 1949 | break; |
890ca9ae HY |
1950 | case KVM_CAP_MCE: |
1951 | r = KVM_MAX_MCE_BANKS; | |
1952 | break; | |
2d5b5a66 SY |
1953 | case KVM_CAP_XCRS: |
1954 | r = cpu_has_xsave; | |
1955 | break; | |
018d00d2 ZX |
1956 | default: |
1957 | r = 0; | |
1958 | break; | |
1959 | } | |
1960 | return r; | |
1961 | ||
1962 | } | |
1963 | ||
043405e1 CO |
1964 | long kvm_arch_dev_ioctl(struct file *filp, |
1965 | unsigned int ioctl, unsigned long arg) | |
1966 | { | |
1967 | void __user *argp = (void __user *)arg; | |
1968 | long r; | |
1969 | ||
1970 | switch (ioctl) { | |
1971 | case KVM_GET_MSR_INDEX_LIST: { | |
1972 | struct kvm_msr_list __user *user_msr_list = argp; | |
1973 | struct kvm_msr_list msr_list; | |
1974 | unsigned n; | |
1975 | ||
1976 | r = -EFAULT; | |
1977 | if (copy_from_user(&msr_list, user_msr_list, sizeof msr_list)) | |
1978 | goto out; | |
1979 | n = msr_list.nmsrs; | |
1980 | msr_list.nmsrs = num_msrs_to_save + ARRAY_SIZE(emulated_msrs); | |
1981 | if (copy_to_user(user_msr_list, &msr_list, sizeof msr_list)) | |
1982 | goto out; | |
1983 | r = -E2BIG; | |
e125e7b6 | 1984 | if (n < msr_list.nmsrs) |
043405e1 CO |
1985 | goto out; |
1986 | r = -EFAULT; | |
1987 | if (copy_to_user(user_msr_list->indices, &msrs_to_save, | |
1988 | num_msrs_to_save * sizeof(u32))) | |
1989 | goto out; | |
e125e7b6 | 1990 | if (copy_to_user(user_msr_list->indices + num_msrs_to_save, |
043405e1 CO |
1991 | &emulated_msrs, |
1992 | ARRAY_SIZE(emulated_msrs) * sizeof(u32))) | |
1993 | goto out; | |
1994 | r = 0; | |
1995 | break; | |
1996 | } | |
674eea0f AK |
1997 | case KVM_GET_SUPPORTED_CPUID: { |
1998 | struct kvm_cpuid2 __user *cpuid_arg = argp; | |
1999 | struct kvm_cpuid2 cpuid; | |
2000 | ||
2001 | r = -EFAULT; | |
2002 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
2003 | goto out; | |
2004 | r = kvm_dev_ioctl_get_supported_cpuid(&cpuid, | |
19355475 | 2005 | cpuid_arg->entries); |
674eea0f AK |
2006 | if (r) |
2007 | goto out; | |
2008 | ||
2009 | r = -EFAULT; | |
2010 | if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid)) | |
2011 | goto out; | |
2012 | r = 0; | |
2013 | break; | |
2014 | } | |
890ca9ae HY |
2015 | case KVM_X86_GET_MCE_CAP_SUPPORTED: { |
2016 | u64 mce_cap; | |
2017 | ||
2018 | mce_cap = KVM_MCE_CAP_SUPPORTED; | |
2019 | r = -EFAULT; | |
2020 | if (copy_to_user(argp, &mce_cap, sizeof mce_cap)) | |
2021 | goto out; | |
2022 | r = 0; | |
2023 | break; | |
2024 | } | |
043405e1 CO |
2025 | default: |
2026 | r = -EINVAL; | |
2027 | } | |
2028 | out: | |
2029 | return r; | |
2030 | } | |
2031 | ||
f5f48ee1 SY |
2032 | static void wbinvd_ipi(void *garbage) |
2033 | { | |
2034 | wbinvd(); | |
2035 | } | |
2036 | ||
2037 | static bool need_emulate_wbinvd(struct kvm_vcpu *vcpu) | |
2038 | { | |
2039 | return vcpu->kvm->arch.iommu_domain && | |
2040 | !(vcpu->kvm->arch.iommu_flags & KVM_IOMMU_CACHE_COHERENCY); | |
2041 | } | |
2042 | ||
313a3dc7 CO |
2043 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
2044 | { | |
f5f48ee1 SY |
2045 | /* Address WBINVD may be executed by guest */ |
2046 | if (need_emulate_wbinvd(vcpu)) { | |
2047 | if (kvm_x86_ops->has_wbinvd_exit()) | |
2048 | cpumask_set_cpu(cpu, vcpu->arch.wbinvd_dirty_mask); | |
2049 | else if (vcpu->cpu != -1 && vcpu->cpu != cpu) | |
2050 | smp_call_function_single(vcpu->cpu, | |
2051 | wbinvd_ipi, NULL, 1); | |
2052 | } | |
2053 | ||
313a3dc7 | 2054 | kvm_x86_ops->vcpu_load(vcpu, cpu); |
48434c20 | 2055 | if (unlikely(vcpu->cpu != cpu) || check_tsc_unstable()) { |
e48672fa ZA |
2056 | /* Make sure TSC doesn't go backwards */ |
2057 | s64 tsc_delta = !vcpu->arch.last_host_tsc ? 0 : | |
2058 | native_read_tsc() - vcpu->arch.last_host_tsc; | |
2059 | if (tsc_delta < 0) | |
2060 | mark_tsc_unstable("KVM discovered backwards TSC"); | |
c285545f | 2061 | if (check_tsc_unstable()) { |
e48672fa | 2062 | kvm_x86_ops->adjust_tsc_offset(vcpu, -tsc_delta); |
c285545f ZA |
2063 | vcpu->arch.tsc_catchup = 1; |
2064 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); | |
2065 | } | |
2066 | if (vcpu->cpu != cpu) | |
2067 | kvm_migrate_timers(vcpu); | |
e48672fa | 2068 | vcpu->cpu = cpu; |
6b7d7e76 | 2069 | } |
313a3dc7 CO |
2070 | } |
2071 | ||
2072 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
2073 | { | |
02daab21 | 2074 | kvm_x86_ops->vcpu_put(vcpu); |
1c11e713 | 2075 | kvm_put_guest_fpu(vcpu); |
e48672fa | 2076 | vcpu->arch.last_host_tsc = native_read_tsc(); |
313a3dc7 CO |
2077 | } |
2078 | ||
07716717 | 2079 | static int is_efer_nx(void) |
313a3dc7 | 2080 | { |
e286e86e | 2081 | unsigned long long efer = 0; |
313a3dc7 | 2082 | |
e286e86e | 2083 | rdmsrl_safe(MSR_EFER, &efer); |
07716717 DK |
2084 | return efer & EFER_NX; |
2085 | } | |
2086 | ||
2087 | static void cpuid_fix_nx_cap(struct kvm_vcpu *vcpu) | |
2088 | { | |
2089 | int i; | |
2090 | struct kvm_cpuid_entry2 *e, *entry; | |
2091 | ||
313a3dc7 | 2092 | entry = NULL; |
ad312c7c ZX |
2093 | for (i = 0; i < vcpu->arch.cpuid_nent; ++i) { |
2094 | e = &vcpu->arch.cpuid_entries[i]; | |
313a3dc7 CO |
2095 | if (e->function == 0x80000001) { |
2096 | entry = e; | |
2097 | break; | |
2098 | } | |
2099 | } | |
07716717 | 2100 | if (entry && (entry->edx & (1 << 20)) && !is_efer_nx()) { |
313a3dc7 CO |
2101 | entry->edx &= ~(1 << 20); |
2102 | printk(KERN_INFO "kvm: guest NX capability removed\n"); | |
2103 | } | |
2104 | } | |
2105 | ||
07716717 | 2106 | /* when an old userspace process fills a new kernel module */ |
313a3dc7 CO |
2107 | static int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu *vcpu, |
2108 | struct kvm_cpuid *cpuid, | |
2109 | struct kvm_cpuid_entry __user *entries) | |
07716717 DK |
2110 | { |
2111 | int r, i; | |
2112 | struct kvm_cpuid_entry *cpuid_entries; | |
2113 | ||
2114 | r = -E2BIG; | |
2115 | if (cpuid->nent > KVM_MAX_CPUID_ENTRIES) | |
2116 | goto out; | |
2117 | r = -ENOMEM; | |
2118 | cpuid_entries = vmalloc(sizeof(struct kvm_cpuid_entry) * cpuid->nent); | |
2119 | if (!cpuid_entries) | |
2120 | goto out; | |
2121 | r = -EFAULT; | |
2122 | if (copy_from_user(cpuid_entries, entries, | |
2123 | cpuid->nent * sizeof(struct kvm_cpuid_entry))) | |
2124 | goto out_free; | |
2125 | for (i = 0; i < cpuid->nent; i++) { | |
ad312c7c ZX |
2126 | vcpu->arch.cpuid_entries[i].function = cpuid_entries[i].function; |
2127 | vcpu->arch.cpuid_entries[i].eax = cpuid_entries[i].eax; | |
2128 | vcpu->arch.cpuid_entries[i].ebx = cpuid_entries[i].ebx; | |
2129 | vcpu->arch.cpuid_entries[i].ecx = cpuid_entries[i].ecx; | |
2130 | vcpu->arch.cpuid_entries[i].edx = cpuid_entries[i].edx; | |
2131 | vcpu->arch.cpuid_entries[i].index = 0; | |
2132 | vcpu->arch.cpuid_entries[i].flags = 0; | |
2133 | vcpu->arch.cpuid_entries[i].padding[0] = 0; | |
2134 | vcpu->arch.cpuid_entries[i].padding[1] = 0; | |
2135 | vcpu->arch.cpuid_entries[i].padding[2] = 0; | |
2136 | } | |
2137 | vcpu->arch.cpuid_nent = cpuid->nent; | |
07716717 DK |
2138 | cpuid_fix_nx_cap(vcpu); |
2139 | r = 0; | |
fc61b800 | 2140 | kvm_apic_set_version(vcpu); |
0e851880 | 2141 | kvm_x86_ops->cpuid_update(vcpu); |
2acf923e | 2142 | update_cpuid(vcpu); |
07716717 DK |
2143 | |
2144 | out_free: | |
2145 | vfree(cpuid_entries); | |
2146 | out: | |
2147 | return r; | |
2148 | } | |
2149 | ||
2150 | static int kvm_vcpu_ioctl_set_cpuid2(struct kvm_vcpu *vcpu, | |
19355475 AS |
2151 | struct kvm_cpuid2 *cpuid, |
2152 | struct kvm_cpuid_entry2 __user *entries) | |
313a3dc7 CO |
2153 | { |
2154 | int r; | |
2155 | ||
2156 | r = -E2BIG; | |
2157 | if (cpuid->nent > KVM_MAX_CPUID_ENTRIES) | |
2158 | goto out; | |
2159 | r = -EFAULT; | |
ad312c7c | 2160 | if (copy_from_user(&vcpu->arch.cpuid_entries, entries, |
07716717 | 2161 | cpuid->nent * sizeof(struct kvm_cpuid_entry2))) |
313a3dc7 | 2162 | goto out; |
ad312c7c | 2163 | vcpu->arch.cpuid_nent = cpuid->nent; |
fc61b800 | 2164 | kvm_apic_set_version(vcpu); |
0e851880 | 2165 | kvm_x86_ops->cpuid_update(vcpu); |
2acf923e | 2166 | update_cpuid(vcpu); |
313a3dc7 CO |
2167 | return 0; |
2168 | ||
2169 | out: | |
2170 | return r; | |
2171 | } | |
2172 | ||
07716717 | 2173 | static int kvm_vcpu_ioctl_get_cpuid2(struct kvm_vcpu *vcpu, |
19355475 AS |
2174 | struct kvm_cpuid2 *cpuid, |
2175 | struct kvm_cpuid_entry2 __user *entries) | |
07716717 DK |
2176 | { |
2177 | int r; | |
2178 | ||
2179 | r = -E2BIG; | |
ad312c7c | 2180 | if (cpuid->nent < vcpu->arch.cpuid_nent) |
07716717 DK |
2181 | goto out; |
2182 | r = -EFAULT; | |
ad312c7c | 2183 | if (copy_to_user(entries, &vcpu->arch.cpuid_entries, |
19355475 | 2184 | vcpu->arch.cpuid_nent * sizeof(struct kvm_cpuid_entry2))) |
07716717 DK |
2185 | goto out; |
2186 | return 0; | |
2187 | ||
2188 | out: | |
ad312c7c | 2189 | cpuid->nent = vcpu->arch.cpuid_nent; |
07716717 DK |
2190 | return r; |
2191 | } | |
2192 | ||
07716717 | 2193 | static void do_cpuid_1_ent(struct kvm_cpuid_entry2 *entry, u32 function, |
19355475 | 2194 | u32 index) |
07716717 DK |
2195 | { |
2196 | entry->function = function; | |
2197 | entry->index = index; | |
2198 | cpuid_count(entry->function, entry->index, | |
19355475 | 2199 | &entry->eax, &entry->ebx, &entry->ecx, &entry->edx); |
07716717 DK |
2200 | entry->flags = 0; |
2201 | } | |
2202 | ||
7faa4ee1 AK |
2203 | #define F(x) bit(X86_FEATURE_##x) |
2204 | ||
07716717 DK |
2205 | static void do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function, |
2206 | u32 index, int *nent, int maxnent) | |
2207 | { | |
7faa4ee1 | 2208 | unsigned f_nx = is_efer_nx() ? F(NX) : 0; |
07716717 | 2209 | #ifdef CONFIG_X86_64 |
17cc3935 SY |
2210 | unsigned f_gbpages = (kvm_x86_ops->get_lpage_level() == PT_PDPE_LEVEL) |
2211 | ? F(GBPAGES) : 0; | |
7faa4ee1 AK |
2212 | unsigned f_lm = F(LM); |
2213 | #else | |
17cc3935 | 2214 | unsigned f_gbpages = 0; |
7faa4ee1 | 2215 | unsigned f_lm = 0; |
07716717 | 2216 | #endif |
4e47c7a6 | 2217 | unsigned f_rdtscp = kvm_x86_ops->rdtscp_supported() ? F(RDTSCP) : 0; |
7faa4ee1 AK |
2218 | |
2219 | /* cpuid 1.edx */ | |
2220 | const u32 kvm_supported_word0_x86_features = | |
2221 | F(FPU) | F(VME) | F(DE) | F(PSE) | | |
2222 | F(TSC) | F(MSR) | F(PAE) | F(MCE) | | |
2223 | F(CX8) | F(APIC) | 0 /* Reserved */ | F(SEP) | | |
2224 | F(MTRR) | F(PGE) | F(MCA) | F(CMOV) | | |
2225 | F(PAT) | F(PSE36) | 0 /* PSN */ | F(CLFLSH) | | |
2226 | 0 /* Reserved, DS, ACPI */ | F(MMX) | | |
2227 | F(FXSR) | F(XMM) | F(XMM2) | F(SELFSNOOP) | | |
2228 | 0 /* HTT, TM, Reserved, PBE */; | |
2229 | /* cpuid 0x80000001.edx */ | |
2230 | const u32 kvm_supported_word1_x86_features = | |
2231 | F(FPU) | F(VME) | F(DE) | F(PSE) | | |
2232 | F(TSC) | F(MSR) | F(PAE) | F(MCE) | | |
2233 | F(CX8) | F(APIC) | 0 /* Reserved */ | F(SYSCALL) | | |
2234 | F(MTRR) | F(PGE) | F(MCA) | F(CMOV) | | |
2235 | F(PAT) | F(PSE36) | 0 /* Reserved */ | | |
2236 | f_nx | 0 /* Reserved */ | F(MMXEXT) | F(MMX) | | |
4e47c7a6 | 2237 | F(FXSR) | F(FXSR_OPT) | f_gbpages | f_rdtscp | |
7faa4ee1 AK |
2238 | 0 /* Reserved */ | f_lm | F(3DNOWEXT) | F(3DNOW); |
2239 | /* cpuid 1.ecx */ | |
2240 | const u32 kvm_supported_word4_x86_features = | |
6c3f6041 | 2241 | F(XMM3) | F(PCLMULQDQ) | 0 /* DTES64, MONITOR */ | |
d149c731 AK |
2242 | 0 /* DS-CPL, VMX, SMX, EST */ | |
2243 | 0 /* TM2 */ | F(SSSE3) | 0 /* CNXT-ID */ | 0 /* Reserved */ | | |
2244 | 0 /* Reserved */ | F(CX16) | 0 /* xTPR Update, PDCM */ | | |
2245 | 0 /* Reserved, DCA */ | F(XMM4_1) | | |
0105d1a5 | 2246 | F(XMM4_2) | F(X2APIC) | F(MOVBE) | F(POPCNT) | |
6d886fd0 AP |
2247 | 0 /* Reserved*/ | F(AES) | F(XSAVE) | 0 /* OSXSAVE */ | F(AVX) | |
2248 | F(F16C); | |
7faa4ee1 | 2249 | /* cpuid 0x80000001.ecx */ |
07716717 | 2250 | const u32 kvm_supported_word6_x86_features = |
4c62a2dc | 2251 | F(LAHF_LM) | F(CMP_LEGACY) | 0 /*SVM*/ | 0 /* ExtApicSpace */ | |
7faa4ee1 | 2252 | F(CR8_LEGACY) | F(ABM) | F(SSE4A) | F(MISALIGNSSE) | |
7ef8aa72 | 2253 | F(3DNOWPREFETCH) | 0 /* OSVW */ | 0 /* IBS */ | F(XOP) | |
6d886fd0 | 2254 | 0 /* SKINIT, WDT, LWP */ | F(FMA4) | F(TBM); |
07716717 | 2255 | |
19355475 | 2256 | /* all calls to cpuid_count() should be made on the same cpu */ |
07716717 DK |
2257 | get_cpu(); |
2258 | do_cpuid_1_ent(entry, function, index); | |
2259 | ++*nent; | |
2260 | ||
2261 | switch (function) { | |
2262 | case 0: | |
2acf923e | 2263 | entry->eax = min(entry->eax, (u32)0xd); |
07716717 DK |
2264 | break; |
2265 | case 1: | |
2266 | entry->edx &= kvm_supported_word0_x86_features; | |
7faa4ee1 | 2267 | entry->ecx &= kvm_supported_word4_x86_features; |
0d1de2d9 GN |
2268 | /* we support x2apic emulation even if host does not support |
2269 | * it since we emulate x2apic in software */ | |
2270 | entry->ecx |= F(X2APIC); | |
07716717 DK |
2271 | break; |
2272 | /* function 2 entries are STATEFUL. That is, repeated cpuid commands | |
2273 | * may return different values. This forces us to get_cpu() before | |
2274 | * issuing the first command, and also to emulate this annoying behavior | |
2275 | * in kvm_emulate_cpuid() using KVM_CPUID_FLAG_STATE_READ_NEXT */ | |
2276 | case 2: { | |
2277 | int t, times = entry->eax & 0xff; | |
2278 | ||
2279 | entry->flags |= KVM_CPUID_FLAG_STATEFUL_FUNC; | |
0fdf8e59 | 2280 | entry->flags |= KVM_CPUID_FLAG_STATE_READ_NEXT; |
07716717 DK |
2281 | for (t = 1; t < times && *nent < maxnent; ++t) { |
2282 | do_cpuid_1_ent(&entry[t], function, 0); | |
2283 | entry[t].flags |= KVM_CPUID_FLAG_STATEFUL_FUNC; | |
2284 | ++*nent; | |
2285 | } | |
2286 | break; | |
2287 | } | |
2288 | /* function 4 and 0xb have additional index. */ | |
2289 | case 4: { | |
14af3f3c | 2290 | int i, cache_type; |
07716717 DK |
2291 | |
2292 | entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX; | |
2293 | /* read more entries until cache_type is zero */ | |
14af3f3c HH |
2294 | for (i = 1; *nent < maxnent; ++i) { |
2295 | cache_type = entry[i - 1].eax & 0x1f; | |
07716717 DK |
2296 | if (!cache_type) |
2297 | break; | |
14af3f3c HH |
2298 | do_cpuid_1_ent(&entry[i], function, i); |
2299 | entry[i].flags |= | |
07716717 DK |
2300 | KVM_CPUID_FLAG_SIGNIFCANT_INDEX; |
2301 | ++*nent; | |
2302 | } | |
2303 | break; | |
2304 | } | |
2305 | case 0xb: { | |
14af3f3c | 2306 | int i, level_type; |
07716717 DK |
2307 | |
2308 | entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX; | |
2309 | /* read more entries until level_type is zero */ | |
14af3f3c | 2310 | for (i = 1; *nent < maxnent; ++i) { |
0853d2c1 | 2311 | level_type = entry[i - 1].ecx & 0xff00; |
07716717 DK |
2312 | if (!level_type) |
2313 | break; | |
14af3f3c HH |
2314 | do_cpuid_1_ent(&entry[i], function, i); |
2315 | entry[i].flags |= | |
07716717 DK |
2316 | KVM_CPUID_FLAG_SIGNIFCANT_INDEX; |
2317 | ++*nent; | |
2318 | } | |
2319 | break; | |
2320 | } | |
2acf923e DC |
2321 | case 0xd: { |
2322 | int i; | |
2323 | ||
2324 | entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX; | |
2325 | for (i = 1; *nent < maxnent; ++i) { | |
2326 | if (entry[i - 1].eax == 0 && i != 2) | |
2327 | break; | |
2328 | do_cpuid_1_ent(&entry[i], function, i); | |
2329 | entry[i].flags |= | |
2330 | KVM_CPUID_FLAG_SIGNIFCANT_INDEX; | |
2331 | ++*nent; | |
2332 | } | |
2333 | break; | |
2334 | } | |
84478c82 GC |
2335 | case KVM_CPUID_SIGNATURE: { |
2336 | char signature[12] = "KVMKVMKVM\0\0"; | |
2337 | u32 *sigptr = (u32 *)signature; | |
2338 | entry->eax = 0; | |
2339 | entry->ebx = sigptr[0]; | |
2340 | entry->ecx = sigptr[1]; | |
2341 | entry->edx = sigptr[2]; | |
2342 | break; | |
2343 | } | |
2344 | case KVM_CPUID_FEATURES: | |
2345 | entry->eax = (1 << KVM_FEATURE_CLOCKSOURCE) | | |
2346 | (1 << KVM_FEATURE_NOP_IO_DELAY) | | |
371bcf64 GC |
2347 | (1 << KVM_FEATURE_CLOCKSOURCE2) | |
2348 | (1 << KVM_FEATURE_CLOCKSOURCE_STABLE_BIT); | |
84478c82 GC |
2349 | entry->ebx = 0; |
2350 | entry->ecx = 0; | |
2351 | entry->edx = 0; | |
2352 | break; | |
07716717 DK |
2353 | case 0x80000000: |
2354 | entry->eax = min(entry->eax, 0x8000001a); | |
2355 | break; | |
2356 | case 0x80000001: | |
2357 | entry->edx &= kvm_supported_word1_x86_features; | |
2358 | entry->ecx &= kvm_supported_word6_x86_features; | |
2359 | break; | |
2360 | } | |
d4330ef2 JR |
2361 | |
2362 | kvm_x86_ops->set_supported_cpuid(function, entry); | |
2363 | ||
07716717 DK |
2364 | put_cpu(); |
2365 | } | |
2366 | ||
7faa4ee1 AK |
2367 | #undef F |
2368 | ||
674eea0f | 2369 | static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2 *cpuid, |
19355475 | 2370 | struct kvm_cpuid_entry2 __user *entries) |
07716717 DK |
2371 | { |
2372 | struct kvm_cpuid_entry2 *cpuid_entries; | |
2373 | int limit, nent = 0, r = -E2BIG; | |
2374 | u32 func; | |
2375 | ||
2376 | if (cpuid->nent < 1) | |
2377 | goto out; | |
6a544355 AK |
2378 | if (cpuid->nent > KVM_MAX_CPUID_ENTRIES) |
2379 | cpuid->nent = KVM_MAX_CPUID_ENTRIES; | |
07716717 DK |
2380 | r = -ENOMEM; |
2381 | cpuid_entries = vmalloc(sizeof(struct kvm_cpuid_entry2) * cpuid->nent); | |
2382 | if (!cpuid_entries) | |
2383 | goto out; | |
2384 | ||
2385 | do_cpuid_ent(&cpuid_entries[0], 0, 0, &nent, cpuid->nent); | |
2386 | limit = cpuid_entries[0].eax; | |
2387 | for (func = 1; func <= limit && nent < cpuid->nent; ++func) | |
2388 | do_cpuid_ent(&cpuid_entries[nent], func, 0, | |
19355475 | 2389 | &nent, cpuid->nent); |
07716717 DK |
2390 | r = -E2BIG; |
2391 | if (nent >= cpuid->nent) | |
2392 | goto out_free; | |
2393 | ||
2394 | do_cpuid_ent(&cpuid_entries[nent], 0x80000000, 0, &nent, cpuid->nent); | |
2395 | limit = cpuid_entries[nent - 1].eax; | |
2396 | for (func = 0x80000001; func <= limit && nent < cpuid->nent; ++func) | |
2397 | do_cpuid_ent(&cpuid_entries[nent], func, 0, | |
19355475 | 2398 | &nent, cpuid->nent); |
84478c82 GC |
2399 | |
2400 | ||
2401 | ||
2402 | r = -E2BIG; | |
2403 | if (nent >= cpuid->nent) | |
2404 | goto out_free; | |
2405 | ||
2406 | do_cpuid_ent(&cpuid_entries[nent], KVM_CPUID_SIGNATURE, 0, &nent, | |
2407 | cpuid->nent); | |
2408 | ||
2409 | r = -E2BIG; | |
2410 | if (nent >= cpuid->nent) | |
2411 | goto out_free; | |
2412 | ||
2413 | do_cpuid_ent(&cpuid_entries[nent], KVM_CPUID_FEATURES, 0, &nent, | |
2414 | cpuid->nent); | |
2415 | ||
cb007648 MM |
2416 | r = -E2BIG; |
2417 | if (nent >= cpuid->nent) | |
2418 | goto out_free; | |
2419 | ||
07716717 DK |
2420 | r = -EFAULT; |
2421 | if (copy_to_user(entries, cpuid_entries, | |
19355475 | 2422 | nent * sizeof(struct kvm_cpuid_entry2))) |
07716717 DK |
2423 | goto out_free; |
2424 | cpuid->nent = nent; | |
2425 | r = 0; | |
2426 | ||
2427 | out_free: | |
2428 | vfree(cpuid_entries); | |
2429 | out: | |
2430 | return r; | |
2431 | } | |
2432 | ||
313a3dc7 CO |
2433 | static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu *vcpu, |
2434 | struct kvm_lapic_state *s) | |
2435 | { | |
ad312c7c | 2436 | memcpy(s->regs, vcpu->arch.apic->regs, sizeof *s); |
313a3dc7 CO |
2437 | |
2438 | return 0; | |
2439 | } | |
2440 | ||
2441 | static int kvm_vcpu_ioctl_set_lapic(struct kvm_vcpu *vcpu, | |
2442 | struct kvm_lapic_state *s) | |
2443 | { | |
ad312c7c | 2444 | memcpy(vcpu->arch.apic->regs, s->regs, sizeof *s); |
313a3dc7 | 2445 | kvm_apic_post_state_restore(vcpu); |
cb142eb7 | 2446 | update_cr8_intercept(vcpu); |
313a3dc7 CO |
2447 | |
2448 | return 0; | |
2449 | } | |
2450 | ||
f77bc6a4 ZX |
2451 | static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, |
2452 | struct kvm_interrupt *irq) | |
2453 | { | |
2454 | if (irq->irq < 0 || irq->irq >= 256) | |
2455 | return -EINVAL; | |
2456 | if (irqchip_in_kernel(vcpu->kvm)) | |
2457 | return -ENXIO; | |
f77bc6a4 | 2458 | |
66fd3f7f | 2459 | kvm_queue_interrupt(vcpu, irq->irq, false); |
3842d135 | 2460 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
f77bc6a4 | 2461 | |
f77bc6a4 ZX |
2462 | return 0; |
2463 | } | |
2464 | ||
c4abb7c9 JK |
2465 | static int kvm_vcpu_ioctl_nmi(struct kvm_vcpu *vcpu) |
2466 | { | |
c4abb7c9 | 2467 | kvm_inject_nmi(vcpu); |
c4abb7c9 JK |
2468 | |
2469 | return 0; | |
2470 | } | |
2471 | ||
b209749f AK |
2472 | static int vcpu_ioctl_tpr_access_reporting(struct kvm_vcpu *vcpu, |
2473 | struct kvm_tpr_access_ctl *tac) | |
2474 | { | |
2475 | if (tac->flags) | |
2476 | return -EINVAL; | |
2477 | vcpu->arch.tpr_access_reporting = !!tac->enabled; | |
2478 | return 0; | |
2479 | } | |
2480 | ||
890ca9ae HY |
2481 | static int kvm_vcpu_ioctl_x86_setup_mce(struct kvm_vcpu *vcpu, |
2482 | u64 mcg_cap) | |
2483 | { | |
2484 | int r; | |
2485 | unsigned bank_num = mcg_cap & 0xff, bank; | |
2486 | ||
2487 | r = -EINVAL; | |
a9e38c3e | 2488 | if (!bank_num || bank_num >= KVM_MAX_MCE_BANKS) |
890ca9ae HY |
2489 | goto out; |
2490 | if (mcg_cap & ~(KVM_MCE_CAP_SUPPORTED | 0xff | 0xff0000)) | |
2491 | goto out; | |
2492 | r = 0; | |
2493 | vcpu->arch.mcg_cap = mcg_cap; | |
2494 | /* Init IA32_MCG_CTL to all 1s */ | |
2495 | if (mcg_cap & MCG_CTL_P) | |
2496 | vcpu->arch.mcg_ctl = ~(u64)0; | |
2497 | /* Init IA32_MCi_CTL to all 1s */ | |
2498 | for (bank = 0; bank < bank_num; bank++) | |
2499 | vcpu->arch.mce_banks[bank*4] = ~(u64)0; | |
2500 | out: | |
2501 | return r; | |
2502 | } | |
2503 | ||
2504 | static int kvm_vcpu_ioctl_x86_set_mce(struct kvm_vcpu *vcpu, | |
2505 | struct kvm_x86_mce *mce) | |
2506 | { | |
2507 | u64 mcg_cap = vcpu->arch.mcg_cap; | |
2508 | unsigned bank_num = mcg_cap & 0xff; | |
2509 | u64 *banks = vcpu->arch.mce_banks; | |
2510 | ||
2511 | if (mce->bank >= bank_num || !(mce->status & MCI_STATUS_VAL)) | |
2512 | return -EINVAL; | |
2513 | /* | |
2514 | * if IA32_MCG_CTL is not all 1s, the uncorrected error | |
2515 | * reporting is disabled | |
2516 | */ | |
2517 | if ((mce->status & MCI_STATUS_UC) && (mcg_cap & MCG_CTL_P) && | |
2518 | vcpu->arch.mcg_ctl != ~(u64)0) | |
2519 | return 0; | |
2520 | banks += 4 * mce->bank; | |
2521 | /* | |
2522 | * if IA32_MCi_CTL is not all 1s, the uncorrected error | |
2523 | * reporting is disabled for the bank | |
2524 | */ | |
2525 | if ((mce->status & MCI_STATUS_UC) && banks[0] != ~(u64)0) | |
2526 | return 0; | |
2527 | if (mce->status & MCI_STATUS_UC) { | |
2528 | if ((vcpu->arch.mcg_status & MCG_STATUS_MCIP) || | |
fc78f519 | 2529 | !kvm_read_cr4_bits(vcpu, X86_CR4_MCE)) { |
890ca9ae HY |
2530 | printk(KERN_DEBUG "kvm: set_mce: " |
2531 | "injects mce exception while " | |
2532 | "previous one is in progress!\n"); | |
a8eeb04a | 2533 | kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu); |
890ca9ae HY |
2534 | return 0; |
2535 | } | |
2536 | if (banks[1] & MCI_STATUS_VAL) | |
2537 | mce->status |= MCI_STATUS_OVER; | |
2538 | banks[2] = mce->addr; | |
2539 | banks[3] = mce->misc; | |
2540 | vcpu->arch.mcg_status = mce->mcg_status; | |
2541 | banks[1] = mce->status; | |
2542 | kvm_queue_exception(vcpu, MC_VECTOR); | |
2543 | } else if (!(banks[1] & MCI_STATUS_VAL) | |
2544 | || !(banks[1] & MCI_STATUS_UC)) { | |
2545 | if (banks[1] & MCI_STATUS_VAL) | |
2546 | mce->status |= MCI_STATUS_OVER; | |
2547 | banks[2] = mce->addr; | |
2548 | banks[3] = mce->misc; | |
2549 | banks[1] = mce->status; | |
2550 | } else | |
2551 | banks[1] |= MCI_STATUS_OVER; | |
2552 | return 0; | |
2553 | } | |
2554 | ||
3cfc3092 JK |
2555 | static void kvm_vcpu_ioctl_x86_get_vcpu_events(struct kvm_vcpu *vcpu, |
2556 | struct kvm_vcpu_events *events) | |
2557 | { | |
03b82a30 JK |
2558 | events->exception.injected = |
2559 | vcpu->arch.exception.pending && | |
2560 | !kvm_exception_is_soft(vcpu->arch.exception.nr); | |
3cfc3092 JK |
2561 | events->exception.nr = vcpu->arch.exception.nr; |
2562 | events->exception.has_error_code = vcpu->arch.exception.has_error_code; | |
2563 | events->exception.error_code = vcpu->arch.exception.error_code; | |
2564 | ||
03b82a30 JK |
2565 | events->interrupt.injected = |
2566 | vcpu->arch.interrupt.pending && !vcpu->arch.interrupt.soft; | |
3cfc3092 | 2567 | events->interrupt.nr = vcpu->arch.interrupt.nr; |
03b82a30 | 2568 | events->interrupt.soft = 0; |
48005f64 JK |
2569 | events->interrupt.shadow = |
2570 | kvm_x86_ops->get_interrupt_shadow(vcpu, | |
2571 | KVM_X86_SHADOW_INT_MOV_SS | KVM_X86_SHADOW_INT_STI); | |
3cfc3092 JK |
2572 | |
2573 | events->nmi.injected = vcpu->arch.nmi_injected; | |
2574 | events->nmi.pending = vcpu->arch.nmi_pending; | |
2575 | events->nmi.masked = kvm_x86_ops->get_nmi_mask(vcpu); | |
2576 | ||
2577 | events->sipi_vector = vcpu->arch.sipi_vector; | |
2578 | ||
dab4b911 | 2579 | events->flags = (KVM_VCPUEVENT_VALID_NMI_PENDING |
48005f64 JK |
2580 | | KVM_VCPUEVENT_VALID_SIPI_VECTOR |
2581 | | KVM_VCPUEVENT_VALID_SHADOW); | |
3cfc3092 JK |
2582 | } |
2583 | ||
2584 | static int kvm_vcpu_ioctl_x86_set_vcpu_events(struct kvm_vcpu *vcpu, | |
2585 | struct kvm_vcpu_events *events) | |
2586 | { | |
dab4b911 | 2587 | if (events->flags & ~(KVM_VCPUEVENT_VALID_NMI_PENDING |
48005f64 JK |
2588 | | KVM_VCPUEVENT_VALID_SIPI_VECTOR |
2589 | | KVM_VCPUEVENT_VALID_SHADOW)) | |
3cfc3092 JK |
2590 | return -EINVAL; |
2591 | ||
3cfc3092 JK |
2592 | vcpu->arch.exception.pending = events->exception.injected; |
2593 | vcpu->arch.exception.nr = events->exception.nr; | |
2594 | vcpu->arch.exception.has_error_code = events->exception.has_error_code; | |
2595 | vcpu->arch.exception.error_code = events->exception.error_code; | |
2596 | ||
2597 | vcpu->arch.interrupt.pending = events->interrupt.injected; | |
2598 | vcpu->arch.interrupt.nr = events->interrupt.nr; | |
2599 | vcpu->arch.interrupt.soft = events->interrupt.soft; | |
2600 | if (vcpu->arch.interrupt.pending && irqchip_in_kernel(vcpu->kvm)) | |
2601 | kvm_pic_clear_isr_ack(vcpu->kvm); | |
48005f64 JK |
2602 | if (events->flags & KVM_VCPUEVENT_VALID_SHADOW) |
2603 | kvm_x86_ops->set_interrupt_shadow(vcpu, | |
2604 | events->interrupt.shadow); | |
3cfc3092 JK |
2605 | |
2606 | vcpu->arch.nmi_injected = events->nmi.injected; | |
dab4b911 JK |
2607 | if (events->flags & KVM_VCPUEVENT_VALID_NMI_PENDING) |
2608 | vcpu->arch.nmi_pending = events->nmi.pending; | |
3cfc3092 JK |
2609 | kvm_x86_ops->set_nmi_mask(vcpu, events->nmi.masked); |
2610 | ||
dab4b911 JK |
2611 | if (events->flags & KVM_VCPUEVENT_VALID_SIPI_VECTOR) |
2612 | vcpu->arch.sipi_vector = events->sipi_vector; | |
3cfc3092 | 2613 | |
3842d135 AK |
2614 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
2615 | ||
3cfc3092 JK |
2616 | return 0; |
2617 | } | |
2618 | ||
a1efbe77 JK |
2619 | static void kvm_vcpu_ioctl_x86_get_debugregs(struct kvm_vcpu *vcpu, |
2620 | struct kvm_debugregs *dbgregs) | |
2621 | { | |
a1efbe77 JK |
2622 | memcpy(dbgregs->db, vcpu->arch.db, sizeof(vcpu->arch.db)); |
2623 | dbgregs->dr6 = vcpu->arch.dr6; | |
2624 | dbgregs->dr7 = vcpu->arch.dr7; | |
2625 | dbgregs->flags = 0; | |
a1efbe77 JK |
2626 | } |
2627 | ||
2628 | static int kvm_vcpu_ioctl_x86_set_debugregs(struct kvm_vcpu *vcpu, | |
2629 | struct kvm_debugregs *dbgregs) | |
2630 | { | |
2631 | if (dbgregs->flags) | |
2632 | return -EINVAL; | |
2633 | ||
a1efbe77 JK |
2634 | memcpy(vcpu->arch.db, dbgregs->db, sizeof(vcpu->arch.db)); |
2635 | vcpu->arch.dr6 = dbgregs->dr6; | |
2636 | vcpu->arch.dr7 = dbgregs->dr7; | |
2637 | ||
a1efbe77 JK |
2638 | return 0; |
2639 | } | |
2640 | ||
2d5b5a66 SY |
2641 | static void kvm_vcpu_ioctl_x86_get_xsave(struct kvm_vcpu *vcpu, |
2642 | struct kvm_xsave *guest_xsave) | |
2643 | { | |
2644 | if (cpu_has_xsave) | |
2645 | memcpy(guest_xsave->region, | |
2646 | &vcpu->arch.guest_fpu.state->xsave, | |
f45755b8 | 2647 | xstate_size); |
2d5b5a66 SY |
2648 | else { |
2649 | memcpy(guest_xsave->region, | |
2650 | &vcpu->arch.guest_fpu.state->fxsave, | |
2651 | sizeof(struct i387_fxsave_struct)); | |
2652 | *(u64 *)&guest_xsave->region[XSAVE_HDR_OFFSET / sizeof(u32)] = | |
2653 | XSTATE_FPSSE; | |
2654 | } | |
2655 | } | |
2656 | ||
2657 | static int kvm_vcpu_ioctl_x86_set_xsave(struct kvm_vcpu *vcpu, | |
2658 | struct kvm_xsave *guest_xsave) | |
2659 | { | |
2660 | u64 xstate_bv = | |
2661 | *(u64 *)&guest_xsave->region[XSAVE_HDR_OFFSET / sizeof(u32)]; | |
2662 | ||
2663 | if (cpu_has_xsave) | |
2664 | memcpy(&vcpu->arch.guest_fpu.state->xsave, | |
f45755b8 | 2665 | guest_xsave->region, xstate_size); |
2d5b5a66 SY |
2666 | else { |
2667 | if (xstate_bv & ~XSTATE_FPSSE) | |
2668 | return -EINVAL; | |
2669 | memcpy(&vcpu->arch.guest_fpu.state->fxsave, | |
2670 | guest_xsave->region, sizeof(struct i387_fxsave_struct)); | |
2671 | } | |
2672 | return 0; | |
2673 | } | |
2674 | ||
2675 | static void kvm_vcpu_ioctl_x86_get_xcrs(struct kvm_vcpu *vcpu, | |
2676 | struct kvm_xcrs *guest_xcrs) | |
2677 | { | |
2678 | if (!cpu_has_xsave) { | |
2679 | guest_xcrs->nr_xcrs = 0; | |
2680 | return; | |
2681 | } | |
2682 | ||
2683 | guest_xcrs->nr_xcrs = 1; | |
2684 | guest_xcrs->flags = 0; | |
2685 | guest_xcrs->xcrs[0].xcr = XCR_XFEATURE_ENABLED_MASK; | |
2686 | guest_xcrs->xcrs[0].value = vcpu->arch.xcr0; | |
2687 | } | |
2688 | ||
2689 | static int kvm_vcpu_ioctl_x86_set_xcrs(struct kvm_vcpu *vcpu, | |
2690 | struct kvm_xcrs *guest_xcrs) | |
2691 | { | |
2692 | int i, r = 0; | |
2693 | ||
2694 | if (!cpu_has_xsave) | |
2695 | return -EINVAL; | |
2696 | ||
2697 | if (guest_xcrs->nr_xcrs > KVM_MAX_XCRS || guest_xcrs->flags) | |
2698 | return -EINVAL; | |
2699 | ||
2700 | for (i = 0; i < guest_xcrs->nr_xcrs; i++) | |
2701 | /* Only support XCR0 currently */ | |
2702 | if (guest_xcrs->xcrs[0].xcr == XCR_XFEATURE_ENABLED_MASK) { | |
2703 | r = __kvm_set_xcr(vcpu, XCR_XFEATURE_ENABLED_MASK, | |
2704 | guest_xcrs->xcrs[0].value); | |
2705 | break; | |
2706 | } | |
2707 | if (r) | |
2708 | r = -EINVAL; | |
2709 | return r; | |
2710 | } | |
2711 | ||
313a3dc7 CO |
2712 | long kvm_arch_vcpu_ioctl(struct file *filp, |
2713 | unsigned int ioctl, unsigned long arg) | |
2714 | { | |
2715 | struct kvm_vcpu *vcpu = filp->private_data; | |
2716 | void __user *argp = (void __user *)arg; | |
2717 | int r; | |
d1ac91d8 AK |
2718 | union { |
2719 | struct kvm_lapic_state *lapic; | |
2720 | struct kvm_xsave *xsave; | |
2721 | struct kvm_xcrs *xcrs; | |
2722 | void *buffer; | |
2723 | } u; | |
2724 | ||
2725 | u.buffer = NULL; | |
313a3dc7 CO |
2726 | switch (ioctl) { |
2727 | case KVM_GET_LAPIC: { | |
2204ae3c MT |
2728 | r = -EINVAL; |
2729 | if (!vcpu->arch.apic) | |
2730 | goto out; | |
d1ac91d8 | 2731 | u.lapic = kzalloc(sizeof(struct kvm_lapic_state), GFP_KERNEL); |
313a3dc7 | 2732 | |
b772ff36 | 2733 | r = -ENOMEM; |
d1ac91d8 | 2734 | if (!u.lapic) |
b772ff36 | 2735 | goto out; |
d1ac91d8 | 2736 | r = kvm_vcpu_ioctl_get_lapic(vcpu, u.lapic); |
313a3dc7 CO |
2737 | if (r) |
2738 | goto out; | |
2739 | r = -EFAULT; | |
d1ac91d8 | 2740 | if (copy_to_user(argp, u.lapic, sizeof(struct kvm_lapic_state))) |
313a3dc7 CO |
2741 | goto out; |
2742 | r = 0; | |
2743 | break; | |
2744 | } | |
2745 | case KVM_SET_LAPIC: { | |
2204ae3c MT |
2746 | r = -EINVAL; |
2747 | if (!vcpu->arch.apic) | |
2748 | goto out; | |
d1ac91d8 | 2749 | u.lapic = kmalloc(sizeof(struct kvm_lapic_state), GFP_KERNEL); |
b772ff36 | 2750 | r = -ENOMEM; |
d1ac91d8 | 2751 | if (!u.lapic) |
b772ff36 | 2752 | goto out; |
313a3dc7 | 2753 | r = -EFAULT; |
d1ac91d8 | 2754 | if (copy_from_user(u.lapic, argp, sizeof(struct kvm_lapic_state))) |
313a3dc7 | 2755 | goto out; |
d1ac91d8 | 2756 | r = kvm_vcpu_ioctl_set_lapic(vcpu, u.lapic); |
313a3dc7 CO |
2757 | if (r) |
2758 | goto out; | |
2759 | r = 0; | |
2760 | break; | |
2761 | } | |
f77bc6a4 ZX |
2762 | case KVM_INTERRUPT: { |
2763 | struct kvm_interrupt irq; | |
2764 | ||
2765 | r = -EFAULT; | |
2766 | if (copy_from_user(&irq, argp, sizeof irq)) | |
2767 | goto out; | |
2768 | r = kvm_vcpu_ioctl_interrupt(vcpu, &irq); | |
2769 | if (r) | |
2770 | goto out; | |
2771 | r = 0; | |
2772 | break; | |
2773 | } | |
c4abb7c9 JK |
2774 | case KVM_NMI: { |
2775 | r = kvm_vcpu_ioctl_nmi(vcpu); | |
2776 | if (r) | |
2777 | goto out; | |
2778 | r = 0; | |
2779 | break; | |
2780 | } | |
313a3dc7 CO |
2781 | case KVM_SET_CPUID: { |
2782 | struct kvm_cpuid __user *cpuid_arg = argp; | |
2783 | struct kvm_cpuid cpuid; | |
2784 | ||
2785 | r = -EFAULT; | |
2786 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
2787 | goto out; | |
2788 | r = kvm_vcpu_ioctl_set_cpuid(vcpu, &cpuid, cpuid_arg->entries); | |
2789 | if (r) | |
2790 | goto out; | |
2791 | break; | |
2792 | } | |
07716717 DK |
2793 | case KVM_SET_CPUID2: { |
2794 | struct kvm_cpuid2 __user *cpuid_arg = argp; | |
2795 | struct kvm_cpuid2 cpuid; | |
2796 | ||
2797 | r = -EFAULT; | |
2798 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
2799 | goto out; | |
2800 | r = kvm_vcpu_ioctl_set_cpuid2(vcpu, &cpuid, | |
19355475 | 2801 | cpuid_arg->entries); |
07716717 DK |
2802 | if (r) |
2803 | goto out; | |
2804 | break; | |
2805 | } | |
2806 | case KVM_GET_CPUID2: { | |
2807 | struct kvm_cpuid2 __user *cpuid_arg = argp; | |
2808 | struct kvm_cpuid2 cpuid; | |
2809 | ||
2810 | r = -EFAULT; | |
2811 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
2812 | goto out; | |
2813 | r = kvm_vcpu_ioctl_get_cpuid2(vcpu, &cpuid, | |
19355475 | 2814 | cpuid_arg->entries); |
07716717 DK |
2815 | if (r) |
2816 | goto out; | |
2817 | r = -EFAULT; | |
2818 | if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid)) | |
2819 | goto out; | |
2820 | r = 0; | |
2821 | break; | |
2822 | } | |
313a3dc7 CO |
2823 | case KVM_GET_MSRS: |
2824 | r = msr_io(vcpu, argp, kvm_get_msr, 1); | |
2825 | break; | |
2826 | case KVM_SET_MSRS: | |
2827 | r = msr_io(vcpu, argp, do_set_msr, 0); | |
2828 | break; | |
b209749f AK |
2829 | case KVM_TPR_ACCESS_REPORTING: { |
2830 | struct kvm_tpr_access_ctl tac; | |
2831 | ||
2832 | r = -EFAULT; | |
2833 | if (copy_from_user(&tac, argp, sizeof tac)) | |
2834 | goto out; | |
2835 | r = vcpu_ioctl_tpr_access_reporting(vcpu, &tac); | |
2836 | if (r) | |
2837 | goto out; | |
2838 | r = -EFAULT; | |
2839 | if (copy_to_user(argp, &tac, sizeof tac)) | |
2840 | goto out; | |
2841 | r = 0; | |
2842 | break; | |
2843 | }; | |
b93463aa AK |
2844 | case KVM_SET_VAPIC_ADDR: { |
2845 | struct kvm_vapic_addr va; | |
2846 | ||
2847 | r = -EINVAL; | |
2848 | if (!irqchip_in_kernel(vcpu->kvm)) | |
2849 | goto out; | |
2850 | r = -EFAULT; | |
2851 | if (copy_from_user(&va, argp, sizeof va)) | |
2852 | goto out; | |
2853 | r = 0; | |
2854 | kvm_lapic_set_vapic_addr(vcpu, va.vapic_addr); | |
2855 | break; | |
2856 | } | |
890ca9ae HY |
2857 | case KVM_X86_SETUP_MCE: { |
2858 | u64 mcg_cap; | |
2859 | ||
2860 | r = -EFAULT; | |
2861 | if (copy_from_user(&mcg_cap, argp, sizeof mcg_cap)) | |
2862 | goto out; | |
2863 | r = kvm_vcpu_ioctl_x86_setup_mce(vcpu, mcg_cap); | |
2864 | break; | |
2865 | } | |
2866 | case KVM_X86_SET_MCE: { | |
2867 | struct kvm_x86_mce mce; | |
2868 | ||
2869 | r = -EFAULT; | |
2870 | if (copy_from_user(&mce, argp, sizeof mce)) | |
2871 | goto out; | |
2872 | r = kvm_vcpu_ioctl_x86_set_mce(vcpu, &mce); | |
2873 | break; | |
2874 | } | |
3cfc3092 JK |
2875 | case KVM_GET_VCPU_EVENTS: { |
2876 | struct kvm_vcpu_events events; | |
2877 | ||
2878 | kvm_vcpu_ioctl_x86_get_vcpu_events(vcpu, &events); | |
2879 | ||
2880 | r = -EFAULT; | |
2881 | if (copy_to_user(argp, &events, sizeof(struct kvm_vcpu_events))) | |
2882 | break; | |
2883 | r = 0; | |
2884 | break; | |
2885 | } | |
2886 | case KVM_SET_VCPU_EVENTS: { | |
2887 | struct kvm_vcpu_events events; | |
2888 | ||
2889 | r = -EFAULT; | |
2890 | if (copy_from_user(&events, argp, sizeof(struct kvm_vcpu_events))) | |
2891 | break; | |
2892 | ||
2893 | r = kvm_vcpu_ioctl_x86_set_vcpu_events(vcpu, &events); | |
2894 | break; | |
2895 | } | |
a1efbe77 JK |
2896 | case KVM_GET_DEBUGREGS: { |
2897 | struct kvm_debugregs dbgregs; | |
2898 | ||
2899 | kvm_vcpu_ioctl_x86_get_debugregs(vcpu, &dbgregs); | |
2900 | ||
2901 | r = -EFAULT; | |
2902 | if (copy_to_user(argp, &dbgregs, | |
2903 | sizeof(struct kvm_debugregs))) | |
2904 | break; | |
2905 | r = 0; | |
2906 | break; | |
2907 | } | |
2908 | case KVM_SET_DEBUGREGS: { | |
2909 | struct kvm_debugregs dbgregs; | |
2910 | ||
2911 | r = -EFAULT; | |
2912 | if (copy_from_user(&dbgregs, argp, | |
2913 | sizeof(struct kvm_debugregs))) | |
2914 | break; | |
2915 | ||
2916 | r = kvm_vcpu_ioctl_x86_set_debugregs(vcpu, &dbgregs); | |
2917 | break; | |
2918 | } | |
2d5b5a66 | 2919 | case KVM_GET_XSAVE: { |
d1ac91d8 | 2920 | u.xsave = kzalloc(sizeof(struct kvm_xsave), GFP_KERNEL); |
2d5b5a66 | 2921 | r = -ENOMEM; |
d1ac91d8 | 2922 | if (!u.xsave) |
2d5b5a66 SY |
2923 | break; |
2924 | ||
d1ac91d8 | 2925 | kvm_vcpu_ioctl_x86_get_xsave(vcpu, u.xsave); |
2d5b5a66 SY |
2926 | |
2927 | r = -EFAULT; | |
d1ac91d8 | 2928 | if (copy_to_user(argp, u.xsave, sizeof(struct kvm_xsave))) |
2d5b5a66 SY |
2929 | break; |
2930 | r = 0; | |
2931 | break; | |
2932 | } | |
2933 | case KVM_SET_XSAVE: { | |
d1ac91d8 | 2934 | u.xsave = kzalloc(sizeof(struct kvm_xsave), GFP_KERNEL); |
2d5b5a66 | 2935 | r = -ENOMEM; |
d1ac91d8 | 2936 | if (!u.xsave) |
2d5b5a66 SY |
2937 | break; |
2938 | ||
2939 | r = -EFAULT; | |
d1ac91d8 | 2940 | if (copy_from_user(u.xsave, argp, sizeof(struct kvm_xsave))) |
2d5b5a66 SY |
2941 | break; |
2942 | ||
d1ac91d8 | 2943 | r = kvm_vcpu_ioctl_x86_set_xsave(vcpu, u.xsave); |
2d5b5a66 SY |
2944 | break; |
2945 | } | |
2946 | case KVM_GET_XCRS: { | |
d1ac91d8 | 2947 | u.xcrs = kzalloc(sizeof(struct kvm_xcrs), GFP_KERNEL); |
2d5b5a66 | 2948 | r = -ENOMEM; |
d1ac91d8 | 2949 | if (!u.xcrs) |
2d5b5a66 SY |
2950 | break; |
2951 | ||
d1ac91d8 | 2952 | kvm_vcpu_ioctl_x86_get_xcrs(vcpu, u.xcrs); |
2d5b5a66 SY |
2953 | |
2954 | r = -EFAULT; | |
d1ac91d8 | 2955 | if (copy_to_user(argp, u.xcrs, |
2d5b5a66 SY |
2956 | sizeof(struct kvm_xcrs))) |
2957 | break; | |
2958 | r = 0; | |
2959 | break; | |
2960 | } | |
2961 | case KVM_SET_XCRS: { | |
d1ac91d8 | 2962 | u.xcrs = kzalloc(sizeof(struct kvm_xcrs), GFP_KERNEL); |
2d5b5a66 | 2963 | r = -ENOMEM; |
d1ac91d8 | 2964 | if (!u.xcrs) |
2d5b5a66 SY |
2965 | break; |
2966 | ||
2967 | r = -EFAULT; | |
d1ac91d8 | 2968 | if (copy_from_user(u.xcrs, argp, |
2d5b5a66 SY |
2969 | sizeof(struct kvm_xcrs))) |
2970 | break; | |
2971 | ||
d1ac91d8 | 2972 | r = kvm_vcpu_ioctl_x86_set_xcrs(vcpu, u.xcrs); |
2d5b5a66 SY |
2973 | break; |
2974 | } | |
313a3dc7 CO |
2975 | default: |
2976 | r = -EINVAL; | |
2977 | } | |
2978 | out: | |
d1ac91d8 | 2979 | kfree(u.buffer); |
313a3dc7 CO |
2980 | return r; |
2981 | } | |
2982 | ||
1fe779f8 CO |
2983 | static int kvm_vm_ioctl_set_tss_addr(struct kvm *kvm, unsigned long addr) |
2984 | { | |
2985 | int ret; | |
2986 | ||
2987 | if (addr > (unsigned int)(-3 * PAGE_SIZE)) | |
2988 | return -1; | |
2989 | ret = kvm_x86_ops->set_tss_addr(kvm, addr); | |
2990 | return ret; | |
2991 | } | |
2992 | ||
b927a3ce SY |
2993 | static int kvm_vm_ioctl_set_identity_map_addr(struct kvm *kvm, |
2994 | u64 ident_addr) | |
2995 | { | |
2996 | kvm->arch.ept_identity_map_addr = ident_addr; | |
2997 | return 0; | |
2998 | } | |
2999 | ||
1fe779f8 CO |
3000 | static int kvm_vm_ioctl_set_nr_mmu_pages(struct kvm *kvm, |
3001 | u32 kvm_nr_mmu_pages) | |
3002 | { | |
3003 | if (kvm_nr_mmu_pages < KVM_MIN_ALLOC_MMU_PAGES) | |
3004 | return -EINVAL; | |
3005 | ||
79fac95e | 3006 | mutex_lock(&kvm->slots_lock); |
7c8a83b7 | 3007 | spin_lock(&kvm->mmu_lock); |
1fe779f8 CO |
3008 | |
3009 | kvm_mmu_change_mmu_pages(kvm, kvm_nr_mmu_pages); | |
f05e70ac | 3010 | kvm->arch.n_requested_mmu_pages = kvm_nr_mmu_pages; |
1fe779f8 | 3011 | |
7c8a83b7 | 3012 | spin_unlock(&kvm->mmu_lock); |
79fac95e | 3013 | mutex_unlock(&kvm->slots_lock); |
1fe779f8 CO |
3014 | return 0; |
3015 | } | |
3016 | ||
3017 | static int kvm_vm_ioctl_get_nr_mmu_pages(struct kvm *kvm) | |
3018 | { | |
39de71ec | 3019 | return kvm->arch.n_max_mmu_pages; |
1fe779f8 CO |
3020 | } |
3021 | ||
1fe779f8 CO |
3022 | static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) |
3023 | { | |
3024 | int r; | |
3025 | ||
3026 | r = 0; | |
3027 | switch (chip->chip_id) { | |
3028 | case KVM_IRQCHIP_PIC_MASTER: | |
3029 | memcpy(&chip->chip.pic, | |
3030 | &pic_irqchip(kvm)->pics[0], | |
3031 | sizeof(struct kvm_pic_state)); | |
3032 | break; | |
3033 | case KVM_IRQCHIP_PIC_SLAVE: | |
3034 | memcpy(&chip->chip.pic, | |
3035 | &pic_irqchip(kvm)->pics[1], | |
3036 | sizeof(struct kvm_pic_state)); | |
3037 | break; | |
3038 | case KVM_IRQCHIP_IOAPIC: | |
eba0226b | 3039 | r = kvm_get_ioapic(kvm, &chip->chip.ioapic); |
1fe779f8 CO |
3040 | break; |
3041 | default: | |
3042 | r = -EINVAL; | |
3043 | break; | |
3044 | } | |
3045 | return r; | |
3046 | } | |
3047 | ||
3048 | static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) | |
3049 | { | |
3050 | int r; | |
3051 | ||
3052 | r = 0; | |
3053 | switch (chip->chip_id) { | |
3054 | case KVM_IRQCHIP_PIC_MASTER: | |
f4f51050 | 3055 | spin_lock(&pic_irqchip(kvm)->lock); |
1fe779f8 CO |
3056 | memcpy(&pic_irqchip(kvm)->pics[0], |
3057 | &chip->chip.pic, | |
3058 | sizeof(struct kvm_pic_state)); | |
f4f51050 | 3059 | spin_unlock(&pic_irqchip(kvm)->lock); |
1fe779f8 CO |
3060 | break; |
3061 | case KVM_IRQCHIP_PIC_SLAVE: | |
f4f51050 | 3062 | spin_lock(&pic_irqchip(kvm)->lock); |
1fe779f8 CO |
3063 | memcpy(&pic_irqchip(kvm)->pics[1], |
3064 | &chip->chip.pic, | |
3065 | sizeof(struct kvm_pic_state)); | |
f4f51050 | 3066 | spin_unlock(&pic_irqchip(kvm)->lock); |
1fe779f8 CO |
3067 | break; |
3068 | case KVM_IRQCHIP_IOAPIC: | |
eba0226b | 3069 | r = kvm_set_ioapic(kvm, &chip->chip.ioapic); |
1fe779f8 CO |
3070 | break; |
3071 | default: | |
3072 | r = -EINVAL; | |
3073 | break; | |
3074 | } | |
3075 | kvm_pic_update_irq(pic_irqchip(kvm)); | |
3076 | return r; | |
3077 | } | |
3078 | ||
e0f63cb9 SY |
3079 | static int kvm_vm_ioctl_get_pit(struct kvm *kvm, struct kvm_pit_state *ps) |
3080 | { | |
3081 | int r = 0; | |
3082 | ||
894a9c55 | 3083 | mutex_lock(&kvm->arch.vpit->pit_state.lock); |
e0f63cb9 | 3084 | memcpy(ps, &kvm->arch.vpit->pit_state, sizeof(struct kvm_pit_state)); |
894a9c55 | 3085 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); |
e0f63cb9 SY |
3086 | return r; |
3087 | } | |
3088 | ||
3089 | static int kvm_vm_ioctl_set_pit(struct kvm *kvm, struct kvm_pit_state *ps) | |
3090 | { | |
3091 | int r = 0; | |
3092 | ||
894a9c55 | 3093 | mutex_lock(&kvm->arch.vpit->pit_state.lock); |
e0f63cb9 | 3094 | memcpy(&kvm->arch.vpit->pit_state, ps, sizeof(struct kvm_pit_state)); |
e9f42757 BK |
3095 | kvm_pit_load_count(kvm, 0, ps->channels[0].count, 0); |
3096 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); | |
3097 | return r; | |
3098 | } | |
3099 | ||
3100 | static int kvm_vm_ioctl_get_pit2(struct kvm *kvm, struct kvm_pit_state2 *ps) | |
3101 | { | |
3102 | int r = 0; | |
3103 | ||
3104 | mutex_lock(&kvm->arch.vpit->pit_state.lock); | |
3105 | memcpy(ps->channels, &kvm->arch.vpit->pit_state.channels, | |
3106 | sizeof(ps->channels)); | |
3107 | ps->flags = kvm->arch.vpit->pit_state.flags; | |
3108 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); | |
3109 | return r; | |
3110 | } | |
3111 | ||
3112 | static int kvm_vm_ioctl_set_pit2(struct kvm *kvm, struct kvm_pit_state2 *ps) | |
3113 | { | |
3114 | int r = 0, start = 0; | |
3115 | u32 prev_legacy, cur_legacy; | |
3116 | mutex_lock(&kvm->arch.vpit->pit_state.lock); | |
3117 | prev_legacy = kvm->arch.vpit->pit_state.flags & KVM_PIT_FLAGS_HPET_LEGACY; | |
3118 | cur_legacy = ps->flags & KVM_PIT_FLAGS_HPET_LEGACY; | |
3119 | if (!prev_legacy && cur_legacy) | |
3120 | start = 1; | |
3121 | memcpy(&kvm->arch.vpit->pit_state.channels, &ps->channels, | |
3122 | sizeof(kvm->arch.vpit->pit_state.channels)); | |
3123 | kvm->arch.vpit->pit_state.flags = ps->flags; | |
3124 | kvm_pit_load_count(kvm, 0, kvm->arch.vpit->pit_state.channels[0].count, start); | |
894a9c55 | 3125 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); |
e0f63cb9 SY |
3126 | return r; |
3127 | } | |
3128 | ||
52d939a0 MT |
3129 | static int kvm_vm_ioctl_reinject(struct kvm *kvm, |
3130 | struct kvm_reinject_control *control) | |
3131 | { | |
3132 | if (!kvm->arch.vpit) | |
3133 | return -ENXIO; | |
894a9c55 | 3134 | mutex_lock(&kvm->arch.vpit->pit_state.lock); |
52d939a0 | 3135 | kvm->arch.vpit->pit_state.pit_timer.reinject = control->pit_reinject; |
894a9c55 | 3136 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); |
52d939a0 MT |
3137 | return 0; |
3138 | } | |
3139 | ||
5bb064dc ZX |
3140 | /* |
3141 | * Get (and clear) the dirty memory log for a memory slot. | |
3142 | */ | |
3143 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, | |
3144 | struct kvm_dirty_log *log) | |
3145 | { | |
87bf6e7d | 3146 | int r, i; |
5bb064dc | 3147 | struct kvm_memory_slot *memslot; |
87bf6e7d | 3148 | unsigned long n; |
b050b015 | 3149 | unsigned long is_dirty = 0; |
5bb064dc | 3150 | |
79fac95e | 3151 | mutex_lock(&kvm->slots_lock); |
5bb064dc | 3152 | |
b050b015 MT |
3153 | r = -EINVAL; |
3154 | if (log->slot >= KVM_MEMORY_SLOTS) | |
3155 | goto out; | |
3156 | ||
3157 | memslot = &kvm->memslots->memslots[log->slot]; | |
3158 | r = -ENOENT; | |
3159 | if (!memslot->dirty_bitmap) | |
3160 | goto out; | |
3161 | ||
87bf6e7d | 3162 | n = kvm_dirty_bitmap_bytes(memslot); |
b050b015 | 3163 | |
b050b015 MT |
3164 | for (i = 0; !is_dirty && i < n/sizeof(long); i++) |
3165 | is_dirty = memslot->dirty_bitmap[i]; | |
5bb064dc ZX |
3166 | |
3167 | /* If nothing is dirty, don't bother messing with page tables. */ | |
3168 | if (is_dirty) { | |
b050b015 | 3169 | struct kvm_memslots *slots, *old_slots; |
914ebccd | 3170 | unsigned long *dirty_bitmap; |
b050b015 | 3171 | |
914ebccd TY |
3172 | r = -ENOMEM; |
3173 | dirty_bitmap = vmalloc(n); | |
3174 | if (!dirty_bitmap) | |
3175 | goto out; | |
3176 | memset(dirty_bitmap, 0, n); | |
b050b015 | 3177 | |
914ebccd TY |
3178 | r = -ENOMEM; |
3179 | slots = kzalloc(sizeof(struct kvm_memslots), GFP_KERNEL); | |
3180 | if (!slots) { | |
3181 | vfree(dirty_bitmap); | |
3182 | goto out; | |
3183 | } | |
b050b015 MT |
3184 | memcpy(slots, kvm->memslots, sizeof(struct kvm_memslots)); |
3185 | slots->memslots[log->slot].dirty_bitmap = dirty_bitmap; | |
3186 | ||
3187 | old_slots = kvm->memslots; | |
3188 | rcu_assign_pointer(kvm->memslots, slots); | |
3189 | synchronize_srcu_expedited(&kvm->srcu); | |
3190 | dirty_bitmap = old_slots->memslots[log->slot].dirty_bitmap; | |
3191 | kfree(old_slots); | |
914ebccd | 3192 | |
edde99ce MT |
3193 | spin_lock(&kvm->mmu_lock); |
3194 | kvm_mmu_slot_remove_write_access(kvm, log->slot); | |
3195 | spin_unlock(&kvm->mmu_lock); | |
3196 | ||
914ebccd TY |
3197 | r = -EFAULT; |
3198 | if (copy_to_user(log->dirty_bitmap, dirty_bitmap, n)) { | |
3199 | vfree(dirty_bitmap); | |
3200 | goto out; | |
3201 | } | |
3202 | vfree(dirty_bitmap); | |
3203 | } else { | |
3204 | r = -EFAULT; | |
3205 | if (clear_user(log->dirty_bitmap, n)) | |
3206 | goto out; | |
5bb064dc | 3207 | } |
b050b015 | 3208 | |
5bb064dc ZX |
3209 | r = 0; |
3210 | out: | |
79fac95e | 3211 | mutex_unlock(&kvm->slots_lock); |
5bb064dc ZX |
3212 | return r; |
3213 | } | |
3214 | ||
1fe779f8 CO |
3215 | long kvm_arch_vm_ioctl(struct file *filp, |
3216 | unsigned int ioctl, unsigned long arg) | |
3217 | { | |
3218 | struct kvm *kvm = filp->private_data; | |
3219 | void __user *argp = (void __user *)arg; | |
367e1319 | 3220 | int r = -ENOTTY; |
f0d66275 DH |
3221 | /* |
3222 | * This union makes it completely explicit to gcc-3.x | |
3223 | * that these two variables' stack usage should be | |
3224 | * combined, not added together. | |
3225 | */ | |
3226 | union { | |
3227 | struct kvm_pit_state ps; | |
e9f42757 | 3228 | struct kvm_pit_state2 ps2; |
c5ff41ce | 3229 | struct kvm_pit_config pit_config; |
f0d66275 | 3230 | } u; |
1fe779f8 CO |
3231 | |
3232 | switch (ioctl) { | |
3233 | case KVM_SET_TSS_ADDR: | |
3234 | r = kvm_vm_ioctl_set_tss_addr(kvm, arg); | |
3235 | if (r < 0) | |
3236 | goto out; | |
3237 | break; | |
b927a3ce SY |
3238 | case KVM_SET_IDENTITY_MAP_ADDR: { |
3239 | u64 ident_addr; | |
3240 | ||
3241 | r = -EFAULT; | |
3242 | if (copy_from_user(&ident_addr, argp, sizeof ident_addr)) | |
3243 | goto out; | |
3244 | r = kvm_vm_ioctl_set_identity_map_addr(kvm, ident_addr); | |
3245 | if (r < 0) | |
3246 | goto out; | |
3247 | break; | |
3248 | } | |
1fe779f8 CO |
3249 | case KVM_SET_NR_MMU_PAGES: |
3250 | r = kvm_vm_ioctl_set_nr_mmu_pages(kvm, arg); | |
3251 | if (r) | |
3252 | goto out; | |
3253 | break; | |
3254 | case KVM_GET_NR_MMU_PAGES: | |
3255 | r = kvm_vm_ioctl_get_nr_mmu_pages(kvm); | |
3256 | break; | |
3ddea128 MT |
3257 | case KVM_CREATE_IRQCHIP: { |
3258 | struct kvm_pic *vpic; | |
3259 | ||
3260 | mutex_lock(&kvm->lock); | |
3261 | r = -EEXIST; | |
3262 | if (kvm->arch.vpic) | |
3263 | goto create_irqchip_unlock; | |
1fe779f8 | 3264 | r = -ENOMEM; |
3ddea128 MT |
3265 | vpic = kvm_create_pic(kvm); |
3266 | if (vpic) { | |
1fe779f8 CO |
3267 | r = kvm_ioapic_init(kvm); |
3268 | if (r) { | |
72bb2fcd WY |
3269 | kvm_io_bus_unregister_dev(kvm, KVM_PIO_BUS, |
3270 | &vpic->dev); | |
3ddea128 MT |
3271 | kfree(vpic); |
3272 | goto create_irqchip_unlock; | |
1fe779f8 CO |
3273 | } |
3274 | } else | |
3ddea128 MT |
3275 | goto create_irqchip_unlock; |
3276 | smp_wmb(); | |
3277 | kvm->arch.vpic = vpic; | |
3278 | smp_wmb(); | |
399ec807 AK |
3279 | r = kvm_setup_default_irq_routing(kvm); |
3280 | if (r) { | |
3ddea128 | 3281 | mutex_lock(&kvm->irq_lock); |
72bb2fcd WY |
3282 | kvm_ioapic_destroy(kvm); |
3283 | kvm_destroy_pic(kvm); | |
3ddea128 | 3284 | mutex_unlock(&kvm->irq_lock); |
399ec807 | 3285 | } |
3ddea128 MT |
3286 | create_irqchip_unlock: |
3287 | mutex_unlock(&kvm->lock); | |
1fe779f8 | 3288 | break; |
3ddea128 | 3289 | } |
7837699f | 3290 | case KVM_CREATE_PIT: |
c5ff41ce JK |
3291 | u.pit_config.flags = KVM_PIT_SPEAKER_DUMMY; |
3292 | goto create_pit; | |
3293 | case KVM_CREATE_PIT2: | |
3294 | r = -EFAULT; | |
3295 | if (copy_from_user(&u.pit_config, argp, | |
3296 | sizeof(struct kvm_pit_config))) | |
3297 | goto out; | |
3298 | create_pit: | |
79fac95e | 3299 | mutex_lock(&kvm->slots_lock); |
269e05e4 AK |
3300 | r = -EEXIST; |
3301 | if (kvm->arch.vpit) | |
3302 | goto create_pit_unlock; | |
7837699f | 3303 | r = -ENOMEM; |
c5ff41ce | 3304 | kvm->arch.vpit = kvm_create_pit(kvm, u.pit_config.flags); |
7837699f SY |
3305 | if (kvm->arch.vpit) |
3306 | r = 0; | |
269e05e4 | 3307 | create_pit_unlock: |
79fac95e | 3308 | mutex_unlock(&kvm->slots_lock); |
7837699f | 3309 | break; |
4925663a | 3310 | case KVM_IRQ_LINE_STATUS: |
1fe779f8 CO |
3311 | case KVM_IRQ_LINE: { |
3312 | struct kvm_irq_level irq_event; | |
3313 | ||
3314 | r = -EFAULT; | |
3315 | if (copy_from_user(&irq_event, argp, sizeof irq_event)) | |
3316 | goto out; | |
160d2f6c | 3317 | r = -ENXIO; |
1fe779f8 | 3318 | if (irqchip_in_kernel(kvm)) { |
4925663a | 3319 | __s32 status; |
4925663a GN |
3320 | status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID, |
3321 | irq_event.irq, irq_event.level); | |
4925663a | 3322 | if (ioctl == KVM_IRQ_LINE_STATUS) { |
160d2f6c | 3323 | r = -EFAULT; |
4925663a GN |
3324 | irq_event.status = status; |
3325 | if (copy_to_user(argp, &irq_event, | |
3326 | sizeof irq_event)) | |
3327 | goto out; | |
3328 | } | |
1fe779f8 CO |
3329 | r = 0; |
3330 | } | |
3331 | break; | |
3332 | } | |
3333 | case KVM_GET_IRQCHIP: { | |
3334 | /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ | |
f0d66275 | 3335 | struct kvm_irqchip *chip = kmalloc(sizeof(*chip), GFP_KERNEL); |
1fe779f8 | 3336 | |
f0d66275 DH |
3337 | r = -ENOMEM; |
3338 | if (!chip) | |
1fe779f8 | 3339 | goto out; |
f0d66275 DH |
3340 | r = -EFAULT; |
3341 | if (copy_from_user(chip, argp, sizeof *chip)) | |
3342 | goto get_irqchip_out; | |
1fe779f8 CO |
3343 | r = -ENXIO; |
3344 | if (!irqchip_in_kernel(kvm)) | |
f0d66275 DH |
3345 | goto get_irqchip_out; |
3346 | r = kvm_vm_ioctl_get_irqchip(kvm, chip); | |
1fe779f8 | 3347 | if (r) |
f0d66275 | 3348 | goto get_irqchip_out; |
1fe779f8 | 3349 | r = -EFAULT; |
f0d66275 DH |
3350 | if (copy_to_user(argp, chip, sizeof *chip)) |
3351 | goto get_irqchip_out; | |
1fe779f8 | 3352 | r = 0; |
f0d66275 DH |
3353 | get_irqchip_out: |
3354 | kfree(chip); | |
3355 | if (r) | |
3356 | goto out; | |
1fe779f8 CO |
3357 | break; |
3358 | } | |
3359 | case KVM_SET_IRQCHIP: { | |
3360 | /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ | |
f0d66275 | 3361 | struct kvm_irqchip *chip = kmalloc(sizeof(*chip), GFP_KERNEL); |
1fe779f8 | 3362 | |
f0d66275 DH |
3363 | r = -ENOMEM; |
3364 | if (!chip) | |
1fe779f8 | 3365 | goto out; |
f0d66275 DH |
3366 | r = -EFAULT; |
3367 | if (copy_from_user(chip, argp, sizeof *chip)) | |
3368 | goto set_irqchip_out; | |
1fe779f8 CO |
3369 | r = -ENXIO; |
3370 | if (!irqchip_in_kernel(kvm)) | |
f0d66275 DH |
3371 | goto set_irqchip_out; |
3372 | r = kvm_vm_ioctl_set_irqchip(kvm, chip); | |
1fe779f8 | 3373 | if (r) |
f0d66275 | 3374 | goto set_irqchip_out; |
1fe779f8 | 3375 | r = 0; |
f0d66275 DH |
3376 | set_irqchip_out: |
3377 | kfree(chip); | |
3378 | if (r) | |
3379 | goto out; | |
1fe779f8 CO |
3380 | break; |
3381 | } | |
e0f63cb9 | 3382 | case KVM_GET_PIT: { |
e0f63cb9 | 3383 | r = -EFAULT; |
f0d66275 | 3384 | if (copy_from_user(&u.ps, argp, sizeof(struct kvm_pit_state))) |
e0f63cb9 SY |
3385 | goto out; |
3386 | r = -ENXIO; | |
3387 | if (!kvm->arch.vpit) | |
3388 | goto out; | |
f0d66275 | 3389 | r = kvm_vm_ioctl_get_pit(kvm, &u.ps); |
e0f63cb9 SY |
3390 | if (r) |
3391 | goto out; | |
3392 | r = -EFAULT; | |
f0d66275 | 3393 | if (copy_to_user(argp, &u.ps, sizeof(struct kvm_pit_state))) |
e0f63cb9 SY |
3394 | goto out; |
3395 | r = 0; | |
3396 | break; | |
3397 | } | |
3398 | case KVM_SET_PIT: { | |
e0f63cb9 | 3399 | r = -EFAULT; |
f0d66275 | 3400 | if (copy_from_user(&u.ps, argp, sizeof u.ps)) |
e0f63cb9 SY |
3401 | goto out; |
3402 | r = -ENXIO; | |
3403 | if (!kvm->arch.vpit) | |
3404 | goto out; | |
f0d66275 | 3405 | r = kvm_vm_ioctl_set_pit(kvm, &u.ps); |
e0f63cb9 SY |
3406 | if (r) |
3407 | goto out; | |
3408 | r = 0; | |
3409 | break; | |
3410 | } | |
e9f42757 BK |
3411 | case KVM_GET_PIT2: { |
3412 | r = -ENXIO; | |
3413 | if (!kvm->arch.vpit) | |
3414 | goto out; | |
3415 | r = kvm_vm_ioctl_get_pit2(kvm, &u.ps2); | |
3416 | if (r) | |
3417 | goto out; | |
3418 | r = -EFAULT; | |
3419 | if (copy_to_user(argp, &u.ps2, sizeof(u.ps2))) | |
3420 | goto out; | |
3421 | r = 0; | |
3422 | break; | |
3423 | } | |
3424 | case KVM_SET_PIT2: { | |
3425 | r = -EFAULT; | |
3426 | if (copy_from_user(&u.ps2, argp, sizeof(u.ps2))) | |
3427 | goto out; | |
3428 | r = -ENXIO; | |
3429 | if (!kvm->arch.vpit) | |
3430 | goto out; | |
3431 | r = kvm_vm_ioctl_set_pit2(kvm, &u.ps2); | |
3432 | if (r) | |
3433 | goto out; | |
3434 | r = 0; | |
3435 | break; | |
3436 | } | |
52d939a0 MT |
3437 | case KVM_REINJECT_CONTROL: { |
3438 | struct kvm_reinject_control control; | |
3439 | r = -EFAULT; | |
3440 | if (copy_from_user(&control, argp, sizeof(control))) | |
3441 | goto out; | |
3442 | r = kvm_vm_ioctl_reinject(kvm, &control); | |
3443 | if (r) | |
3444 | goto out; | |
3445 | r = 0; | |
3446 | break; | |
3447 | } | |
ffde22ac ES |
3448 | case KVM_XEN_HVM_CONFIG: { |
3449 | r = -EFAULT; | |
3450 | if (copy_from_user(&kvm->arch.xen_hvm_config, argp, | |
3451 | sizeof(struct kvm_xen_hvm_config))) | |
3452 | goto out; | |
3453 | r = -EINVAL; | |
3454 | if (kvm->arch.xen_hvm_config.flags) | |
3455 | goto out; | |
3456 | r = 0; | |
3457 | break; | |
3458 | } | |
afbcf7ab | 3459 | case KVM_SET_CLOCK: { |
afbcf7ab GC |
3460 | struct kvm_clock_data user_ns; |
3461 | u64 now_ns; | |
3462 | s64 delta; | |
3463 | ||
3464 | r = -EFAULT; | |
3465 | if (copy_from_user(&user_ns, argp, sizeof(user_ns))) | |
3466 | goto out; | |
3467 | ||
3468 | r = -EINVAL; | |
3469 | if (user_ns.flags) | |
3470 | goto out; | |
3471 | ||
3472 | r = 0; | |
395c6b0a | 3473 | local_irq_disable(); |
759379dd | 3474 | now_ns = get_kernel_ns(); |
afbcf7ab | 3475 | delta = user_ns.clock - now_ns; |
395c6b0a | 3476 | local_irq_enable(); |
afbcf7ab GC |
3477 | kvm->arch.kvmclock_offset = delta; |
3478 | break; | |
3479 | } | |
3480 | case KVM_GET_CLOCK: { | |
afbcf7ab GC |
3481 | struct kvm_clock_data user_ns; |
3482 | u64 now_ns; | |
3483 | ||
395c6b0a | 3484 | local_irq_disable(); |
759379dd | 3485 | now_ns = get_kernel_ns(); |
afbcf7ab | 3486 | user_ns.clock = kvm->arch.kvmclock_offset + now_ns; |
395c6b0a | 3487 | local_irq_enable(); |
afbcf7ab GC |
3488 | user_ns.flags = 0; |
3489 | ||
3490 | r = -EFAULT; | |
3491 | if (copy_to_user(argp, &user_ns, sizeof(user_ns))) | |
3492 | goto out; | |
3493 | r = 0; | |
3494 | break; | |
3495 | } | |
3496 | ||
1fe779f8 CO |
3497 | default: |
3498 | ; | |
3499 | } | |
3500 | out: | |
3501 | return r; | |
3502 | } | |
3503 | ||
a16b043c | 3504 | static void kvm_init_msr_list(void) |
043405e1 CO |
3505 | { |
3506 | u32 dummy[2]; | |
3507 | unsigned i, j; | |
3508 | ||
e3267cbb GC |
3509 | /* skip the first msrs in the list. KVM-specific */ |
3510 | for (i = j = KVM_SAVE_MSRS_BEGIN; i < ARRAY_SIZE(msrs_to_save); i++) { | |
043405e1 CO |
3511 | if (rdmsr_safe(msrs_to_save[i], &dummy[0], &dummy[1]) < 0) |
3512 | continue; | |
3513 | if (j < i) | |
3514 | msrs_to_save[j] = msrs_to_save[i]; | |
3515 | j++; | |
3516 | } | |
3517 | num_msrs_to_save = j; | |
3518 | } | |
3519 | ||
bda9020e MT |
3520 | static int vcpu_mmio_write(struct kvm_vcpu *vcpu, gpa_t addr, int len, |
3521 | const void *v) | |
bbd9b64e | 3522 | { |
bda9020e MT |
3523 | if (vcpu->arch.apic && |
3524 | !kvm_iodevice_write(&vcpu->arch.apic->dev, addr, len, v)) | |
3525 | return 0; | |
bbd9b64e | 3526 | |
e93f8a0f | 3527 | return kvm_io_bus_write(vcpu->kvm, KVM_MMIO_BUS, addr, len, v); |
bbd9b64e CO |
3528 | } |
3529 | ||
bda9020e | 3530 | static int vcpu_mmio_read(struct kvm_vcpu *vcpu, gpa_t addr, int len, void *v) |
bbd9b64e | 3531 | { |
bda9020e MT |
3532 | if (vcpu->arch.apic && |
3533 | !kvm_iodevice_read(&vcpu->arch.apic->dev, addr, len, v)) | |
3534 | return 0; | |
bbd9b64e | 3535 | |
e93f8a0f | 3536 | return kvm_io_bus_read(vcpu->kvm, KVM_MMIO_BUS, addr, len, v); |
bbd9b64e CO |
3537 | } |
3538 | ||
2dafc6c2 GN |
3539 | static void kvm_set_segment(struct kvm_vcpu *vcpu, |
3540 | struct kvm_segment *var, int seg) | |
3541 | { | |
3542 | kvm_x86_ops->set_segment(vcpu, var, seg); | |
3543 | } | |
3544 | ||
3545 | void kvm_get_segment(struct kvm_vcpu *vcpu, | |
3546 | struct kvm_segment *var, int seg) | |
3547 | { | |
3548 | kvm_x86_ops->get_segment(vcpu, var, seg); | |
3549 | } | |
3550 | ||
c30a358d JR |
3551 | static gpa_t translate_gpa(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access) |
3552 | { | |
3553 | return gpa; | |
3554 | } | |
3555 | ||
02f59dc9 JR |
3556 | static gpa_t translate_nested_gpa(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access) |
3557 | { | |
3558 | gpa_t t_gpa; | |
3559 | u32 error; | |
3560 | ||
3561 | BUG_ON(!mmu_is_nested(vcpu)); | |
3562 | ||
3563 | /* NPT walks are always user-walks */ | |
3564 | access |= PFERR_USER_MASK; | |
3565 | t_gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, gpa, access, &error); | |
3566 | if (t_gpa == UNMAPPED_GVA) | |
0959ffac | 3567 | vcpu->arch.fault.nested = true; |
02f59dc9 JR |
3568 | |
3569 | return t_gpa; | |
3570 | } | |
3571 | ||
1871c602 GN |
3572 | gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva, u32 *error) |
3573 | { | |
3574 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
14dfe855 | 3575 | return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, error); |
1871c602 GN |
3576 | } |
3577 | ||
3578 | gpa_t kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu *vcpu, gva_t gva, u32 *error) | |
3579 | { | |
3580 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
3581 | access |= PFERR_FETCH_MASK; | |
14dfe855 | 3582 | return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, error); |
1871c602 GN |
3583 | } |
3584 | ||
3585 | gpa_t kvm_mmu_gva_to_gpa_write(struct kvm_vcpu *vcpu, gva_t gva, u32 *error) | |
3586 | { | |
3587 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
3588 | access |= PFERR_WRITE_MASK; | |
14dfe855 | 3589 | return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, error); |
1871c602 GN |
3590 | } |
3591 | ||
3592 | /* uses this to access any guest's mapped memory without checking CPL */ | |
3593 | gpa_t kvm_mmu_gva_to_gpa_system(struct kvm_vcpu *vcpu, gva_t gva, u32 *error) | |
3594 | { | |
14dfe855 | 3595 | return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, 0, error); |
1871c602 GN |
3596 | } |
3597 | ||
3598 | static int kvm_read_guest_virt_helper(gva_t addr, void *val, unsigned int bytes, | |
3599 | struct kvm_vcpu *vcpu, u32 access, | |
3600 | u32 *error) | |
bbd9b64e CO |
3601 | { |
3602 | void *data = val; | |
10589a46 | 3603 | int r = X86EMUL_CONTINUE; |
bbd9b64e CO |
3604 | |
3605 | while (bytes) { | |
14dfe855 JR |
3606 | gpa_t gpa = vcpu->arch.walk_mmu->gva_to_gpa(vcpu, addr, access, |
3607 | error); | |
bbd9b64e | 3608 | unsigned offset = addr & (PAGE_SIZE-1); |
77c2002e | 3609 | unsigned toread = min(bytes, (unsigned)PAGE_SIZE - offset); |
bbd9b64e CO |
3610 | int ret; |
3611 | ||
10589a46 MT |
3612 | if (gpa == UNMAPPED_GVA) { |
3613 | r = X86EMUL_PROPAGATE_FAULT; | |
3614 | goto out; | |
3615 | } | |
77c2002e | 3616 | ret = kvm_read_guest(vcpu->kvm, gpa, data, toread); |
10589a46 | 3617 | if (ret < 0) { |
c3cd7ffa | 3618 | r = X86EMUL_IO_NEEDED; |
10589a46 MT |
3619 | goto out; |
3620 | } | |
bbd9b64e | 3621 | |
77c2002e IE |
3622 | bytes -= toread; |
3623 | data += toread; | |
3624 | addr += toread; | |
bbd9b64e | 3625 | } |
10589a46 | 3626 | out: |
10589a46 | 3627 | return r; |
bbd9b64e | 3628 | } |
77c2002e | 3629 | |
1871c602 GN |
3630 | /* used for instruction fetching */ |
3631 | static int kvm_fetch_guest_virt(gva_t addr, void *val, unsigned int bytes, | |
3632 | struct kvm_vcpu *vcpu, u32 *error) | |
3633 | { | |
3634 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
3635 | return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, | |
3636 | access | PFERR_FETCH_MASK, error); | |
3637 | } | |
3638 | ||
3639 | static int kvm_read_guest_virt(gva_t addr, void *val, unsigned int bytes, | |
3640 | struct kvm_vcpu *vcpu, u32 *error) | |
3641 | { | |
3642 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
3643 | return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, access, | |
3644 | error); | |
3645 | } | |
3646 | ||
3647 | static int kvm_read_guest_virt_system(gva_t addr, void *val, unsigned int bytes, | |
3648 | struct kvm_vcpu *vcpu, u32 *error) | |
3649 | { | |
3650 | return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, 0, error); | |
3651 | } | |
3652 | ||
7972995b | 3653 | static int kvm_write_guest_virt_system(gva_t addr, void *val, |
2dafc6c2 | 3654 | unsigned int bytes, |
7972995b | 3655 | struct kvm_vcpu *vcpu, |
2dafc6c2 | 3656 | u32 *error) |
77c2002e IE |
3657 | { |
3658 | void *data = val; | |
3659 | int r = X86EMUL_CONTINUE; | |
3660 | ||
3661 | while (bytes) { | |
14dfe855 JR |
3662 | gpa_t gpa = vcpu->arch.walk_mmu->gva_to_gpa(vcpu, addr, |
3663 | PFERR_WRITE_MASK, | |
3664 | error); | |
77c2002e IE |
3665 | unsigned offset = addr & (PAGE_SIZE-1); |
3666 | unsigned towrite = min(bytes, (unsigned)PAGE_SIZE - offset); | |
3667 | int ret; | |
3668 | ||
3669 | if (gpa == UNMAPPED_GVA) { | |
3670 | r = X86EMUL_PROPAGATE_FAULT; | |
3671 | goto out; | |
3672 | } | |
3673 | ret = kvm_write_guest(vcpu->kvm, gpa, data, towrite); | |
3674 | if (ret < 0) { | |
c3cd7ffa | 3675 | r = X86EMUL_IO_NEEDED; |
77c2002e IE |
3676 | goto out; |
3677 | } | |
3678 | ||
3679 | bytes -= towrite; | |
3680 | data += towrite; | |
3681 | addr += towrite; | |
3682 | } | |
3683 | out: | |
3684 | return r; | |
3685 | } | |
3686 | ||
bbd9b64e CO |
3687 | static int emulator_read_emulated(unsigned long addr, |
3688 | void *val, | |
3689 | unsigned int bytes, | |
8fe681e9 | 3690 | unsigned int *error_code, |
bbd9b64e CO |
3691 | struct kvm_vcpu *vcpu) |
3692 | { | |
bbd9b64e CO |
3693 | gpa_t gpa; |
3694 | ||
3695 | if (vcpu->mmio_read_completed) { | |
3696 | memcpy(val, vcpu->mmio_data, bytes); | |
aec51dc4 AK |
3697 | trace_kvm_mmio(KVM_TRACE_MMIO_READ, bytes, |
3698 | vcpu->mmio_phys_addr, *(u64 *)val); | |
bbd9b64e CO |
3699 | vcpu->mmio_read_completed = 0; |
3700 | return X86EMUL_CONTINUE; | |
3701 | } | |
3702 | ||
8fe681e9 | 3703 | gpa = kvm_mmu_gva_to_gpa_read(vcpu, addr, error_code); |
1871c602 | 3704 | |
8fe681e9 | 3705 | if (gpa == UNMAPPED_GVA) |
1871c602 | 3706 | return X86EMUL_PROPAGATE_FAULT; |
bbd9b64e CO |
3707 | |
3708 | /* For APIC access vmexit */ | |
3709 | if ((gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) | |
3710 | goto mmio; | |
3711 | ||
1871c602 | 3712 | if (kvm_read_guest_virt(addr, val, bytes, vcpu, NULL) |
77c2002e | 3713 | == X86EMUL_CONTINUE) |
bbd9b64e | 3714 | return X86EMUL_CONTINUE; |
bbd9b64e CO |
3715 | |
3716 | mmio: | |
3717 | /* | |
3718 | * Is this MMIO handled locally? | |
3719 | */ | |
aec51dc4 AK |
3720 | if (!vcpu_mmio_read(vcpu, gpa, bytes, val)) { |
3721 | trace_kvm_mmio(KVM_TRACE_MMIO_READ, bytes, gpa, *(u64 *)val); | |
bbd9b64e CO |
3722 | return X86EMUL_CONTINUE; |
3723 | } | |
aec51dc4 AK |
3724 | |
3725 | trace_kvm_mmio(KVM_TRACE_MMIO_READ_UNSATISFIED, bytes, gpa, 0); | |
bbd9b64e CO |
3726 | |
3727 | vcpu->mmio_needed = 1; | |
411c35b7 GN |
3728 | vcpu->run->exit_reason = KVM_EXIT_MMIO; |
3729 | vcpu->run->mmio.phys_addr = vcpu->mmio_phys_addr = gpa; | |
3730 | vcpu->run->mmio.len = vcpu->mmio_size = bytes; | |
3731 | vcpu->run->mmio.is_write = vcpu->mmio_is_write = 0; | |
bbd9b64e | 3732 | |
c3cd7ffa | 3733 | return X86EMUL_IO_NEEDED; |
bbd9b64e CO |
3734 | } |
3735 | ||
3200f405 | 3736 | int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa, |
9f811285 | 3737 | const void *val, int bytes) |
bbd9b64e CO |
3738 | { |
3739 | int ret; | |
3740 | ||
3741 | ret = kvm_write_guest(vcpu->kvm, gpa, val, bytes); | |
9f811285 | 3742 | if (ret < 0) |
bbd9b64e | 3743 | return 0; |
ad218f85 | 3744 | kvm_mmu_pte_write(vcpu, gpa, val, bytes, 1); |
bbd9b64e CO |
3745 | return 1; |
3746 | } | |
3747 | ||
3748 | static int emulator_write_emulated_onepage(unsigned long addr, | |
3749 | const void *val, | |
3750 | unsigned int bytes, | |
8fe681e9 | 3751 | unsigned int *error_code, |
bbd9b64e CO |
3752 | struct kvm_vcpu *vcpu) |
3753 | { | |
10589a46 MT |
3754 | gpa_t gpa; |
3755 | ||
8fe681e9 | 3756 | gpa = kvm_mmu_gva_to_gpa_write(vcpu, addr, error_code); |
bbd9b64e | 3757 | |
8fe681e9 | 3758 | if (gpa == UNMAPPED_GVA) |
bbd9b64e | 3759 | return X86EMUL_PROPAGATE_FAULT; |
bbd9b64e CO |
3760 | |
3761 | /* For APIC access vmexit */ | |
3762 | if ((gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) | |
3763 | goto mmio; | |
3764 | ||
3765 | if (emulator_write_phys(vcpu, gpa, val, bytes)) | |
3766 | return X86EMUL_CONTINUE; | |
3767 | ||
3768 | mmio: | |
aec51dc4 | 3769 | trace_kvm_mmio(KVM_TRACE_MMIO_WRITE, bytes, gpa, *(u64 *)val); |
bbd9b64e CO |
3770 | /* |
3771 | * Is this MMIO handled locally? | |
3772 | */ | |
bda9020e | 3773 | if (!vcpu_mmio_write(vcpu, gpa, bytes, val)) |
bbd9b64e | 3774 | return X86EMUL_CONTINUE; |
bbd9b64e CO |
3775 | |
3776 | vcpu->mmio_needed = 1; | |
411c35b7 GN |
3777 | vcpu->run->exit_reason = KVM_EXIT_MMIO; |
3778 | vcpu->run->mmio.phys_addr = vcpu->mmio_phys_addr = gpa; | |
3779 | vcpu->run->mmio.len = vcpu->mmio_size = bytes; | |
3780 | vcpu->run->mmio.is_write = vcpu->mmio_is_write = 1; | |
3781 | memcpy(vcpu->run->mmio.data, val, bytes); | |
bbd9b64e CO |
3782 | |
3783 | return X86EMUL_CONTINUE; | |
3784 | } | |
3785 | ||
3786 | int emulator_write_emulated(unsigned long addr, | |
8f6abd06 GN |
3787 | const void *val, |
3788 | unsigned int bytes, | |
8fe681e9 | 3789 | unsigned int *error_code, |
8f6abd06 | 3790 | struct kvm_vcpu *vcpu) |
bbd9b64e CO |
3791 | { |
3792 | /* Crossing a page boundary? */ | |
3793 | if (((addr + bytes - 1) ^ addr) & PAGE_MASK) { | |
3794 | int rc, now; | |
3795 | ||
3796 | now = -addr & ~PAGE_MASK; | |
8fe681e9 GN |
3797 | rc = emulator_write_emulated_onepage(addr, val, now, error_code, |
3798 | vcpu); | |
bbd9b64e CO |
3799 | if (rc != X86EMUL_CONTINUE) |
3800 | return rc; | |
3801 | addr += now; | |
3802 | val += now; | |
3803 | bytes -= now; | |
3804 | } | |
8fe681e9 GN |
3805 | return emulator_write_emulated_onepage(addr, val, bytes, error_code, |
3806 | vcpu); | |
bbd9b64e | 3807 | } |
bbd9b64e | 3808 | |
daea3e73 AK |
3809 | #define CMPXCHG_TYPE(t, ptr, old, new) \ |
3810 | (cmpxchg((t *)(ptr), *(t *)(old), *(t *)(new)) == *(t *)(old)) | |
3811 | ||
3812 | #ifdef CONFIG_X86_64 | |
3813 | # define CMPXCHG64(ptr, old, new) CMPXCHG_TYPE(u64, ptr, old, new) | |
3814 | #else | |
3815 | # define CMPXCHG64(ptr, old, new) \ | |
9749a6c0 | 3816 | (cmpxchg64((u64 *)(ptr), *(u64 *)(old), *(u64 *)(new)) == *(u64 *)(old)) |
daea3e73 AK |
3817 | #endif |
3818 | ||
bbd9b64e CO |
3819 | static int emulator_cmpxchg_emulated(unsigned long addr, |
3820 | const void *old, | |
3821 | const void *new, | |
3822 | unsigned int bytes, | |
8fe681e9 | 3823 | unsigned int *error_code, |
bbd9b64e CO |
3824 | struct kvm_vcpu *vcpu) |
3825 | { | |
daea3e73 AK |
3826 | gpa_t gpa; |
3827 | struct page *page; | |
3828 | char *kaddr; | |
3829 | bool exchanged; | |
2bacc55c | 3830 | |
daea3e73 AK |
3831 | /* guests cmpxchg8b have to be emulated atomically */ |
3832 | if (bytes > 8 || (bytes & (bytes - 1))) | |
3833 | goto emul_write; | |
10589a46 | 3834 | |
daea3e73 | 3835 | gpa = kvm_mmu_gva_to_gpa_write(vcpu, addr, NULL); |
2bacc55c | 3836 | |
daea3e73 AK |
3837 | if (gpa == UNMAPPED_GVA || |
3838 | (gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) | |
3839 | goto emul_write; | |
2bacc55c | 3840 | |
daea3e73 AK |
3841 | if (((gpa + bytes - 1) & PAGE_MASK) != (gpa & PAGE_MASK)) |
3842 | goto emul_write; | |
72dc67a6 | 3843 | |
daea3e73 | 3844 | page = gfn_to_page(vcpu->kvm, gpa >> PAGE_SHIFT); |
c19b8bd6 WY |
3845 | if (is_error_page(page)) { |
3846 | kvm_release_page_clean(page); | |
3847 | goto emul_write; | |
3848 | } | |
72dc67a6 | 3849 | |
daea3e73 AK |
3850 | kaddr = kmap_atomic(page, KM_USER0); |
3851 | kaddr += offset_in_page(gpa); | |
3852 | switch (bytes) { | |
3853 | case 1: | |
3854 | exchanged = CMPXCHG_TYPE(u8, kaddr, old, new); | |
3855 | break; | |
3856 | case 2: | |
3857 | exchanged = CMPXCHG_TYPE(u16, kaddr, old, new); | |
3858 | break; | |
3859 | case 4: | |
3860 | exchanged = CMPXCHG_TYPE(u32, kaddr, old, new); | |
3861 | break; | |
3862 | case 8: | |
3863 | exchanged = CMPXCHG64(kaddr, old, new); | |
3864 | break; | |
3865 | default: | |
3866 | BUG(); | |
2bacc55c | 3867 | } |
daea3e73 AK |
3868 | kunmap_atomic(kaddr, KM_USER0); |
3869 | kvm_release_page_dirty(page); | |
3870 | ||
3871 | if (!exchanged) | |
3872 | return X86EMUL_CMPXCHG_FAILED; | |
3873 | ||
8f6abd06 GN |
3874 | kvm_mmu_pte_write(vcpu, gpa, new, bytes, 1); |
3875 | ||
3876 | return X86EMUL_CONTINUE; | |
4a5f48f6 | 3877 | |
3200f405 | 3878 | emul_write: |
daea3e73 | 3879 | printk_once(KERN_WARNING "kvm: emulating exchange as write\n"); |
2bacc55c | 3880 | |
8fe681e9 | 3881 | return emulator_write_emulated(addr, new, bytes, error_code, vcpu); |
bbd9b64e CO |
3882 | } |
3883 | ||
cf8f70bf GN |
3884 | static int kernel_pio(struct kvm_vcpu *vcpu, void *pd) |
3885 | { | |
3886 | /* TODO: String I/O for in kernel device */ | |
3887 | int r; | |
3888 | ||
3889 | if (vcpu->arch.pio.in) | |
3890 | r = kvm_io_bus_read(vcpu->kvm, KVM_PIO_BUS, vcpu->arch.pio.port, | |
3891 | vcpu->arch.pio.size, pd); | |
3892 | else | |
3893 | r = kvm_io_bus_write(vcpu->kvm, KVM_PIO_BUS, | |
3894 | vcpu->arch.pio.port, vcpu->arch.pio.size, | |
3895 | pd); | |
3896 | return r; | |
3897 | } | |
3898 | ||
3899 | ||
3900 | static int emulator_pio_in_emulated(int size, unsigned short port, void *val, | |
3901 | unsigned int count, struct kvm_vcpu *vcpu) | |
3902 | { | |
7972995b | 3903 | if (vcpu->arch.pio.count) |
cf8f70bf GN |
3904 | goto data_avail; |
3905 | ||
c41a15dd | 3906 | trace_kvm_pio(0, port, size, 1); |
cf8f70bf GN |
3907 | |
3908 | vcpu->arch.pio.port = port; | |
3909 | vcpu->arch.pio.in = 1; | |
7972995b | 3910 | vcpu->arch.pio.count = count; |
cf8f70bf GN |
3911 | vcpu->arch.pio.size = size; |
3912 | ||
3913 | if (!kernel_pio(vcpu, vcpu->arch.pio_data)) { | |
3914 | data_avail: | |
3915 | memcpy(val, vcpu->arch.pio_data, size * count); | |
7972995b | 3916 | vcpu->arch.pio.count = 0; |
cf8f70bf GN |
3917 | return 1; |
3918 | } | |
3919 | ||
3920 | vcpu->run->exit_reason = KVM_EXIT_IO; | |
3921 | vcpu->run->io.direction = KVM_EXIT_IO_IN; | |
3922 | vcpu->run->io.size = size; | |
3923 | vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE; | |
3924 | vcpu->run->io.count = count; | |
3925 | vcpu->run->io.port = port; | |
3926 | ||
3927 | return 0; | |
3928 | } | |
3929 | ||
3930 | static int emulator_pio_out_emulated(int size, unsigned short port, | |
3931 | const void *val, unsigned int count, | |
3932 | struct kvm_vcpu *vcpu) | |
3933 | { | |
c41a15dd | 3934 | trace_kvm_pio(1, port, size, 1); |
cf8f70bf GN |
3935 | |
3936 | vcpu->arch.pio.port = port; | |
3937 | vcpu->arch.pio.in = 0; | |
7972995b | 3938 | vcpu->arch.pio.count = count; |
cf8f70bf GN |
3939 | vcpu->arch.pio.size = size; |
3940 | ||
3941 | memcpy(vcpu->arch.pio_data, val, size * count); | |
3942 | ||
3943 | if (!kernel_pio(vcpu, vcpu->arch.pio_data)) { | |
7972995b | 3944 | vcpu->arch.pio.count = 0; |
cf8f70bf GN |
3945 | return 1; |
3946 | } | |
3947 | ||
3948 | vcpu->run->exit_reason = KVM_EXIT_IO; | |
3949 | vcpu->run->io.direction = KVM_EXIT_IO_OUT; | |
3950 | vcpu->run->io.size = size; | |
3951 | vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE; | |
3952 | vcpu->run->io.count = count; | |
3953 | vcpu->run->io.port = port; | |
3954 | ||
3955 | return 0; | |
3956 | } | |
3957 | ||
bbd9b64e CO |
3958 | static unsigned long get_segment_base(struct kvm_vcpu *vcpu, int seg) |
3959 | { | |
3960 | return kvm_x86_ops->get_segment_base(vcpu, seg); | |
3961 | } | |
3962 | ||
3963 | int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address) | |
3964 | { | |
a7052897 | 3965 | kvm_mmu_invlpg(vcpu, address); |
bbd9b64e CO |
3966 | return X86EMUL_CONTINUE; |
3967 | } | |
3968 | ||
f5f48ee1 SY |
3969 | int kvm_emulate_wbinvd(struct kvm_vcpu *vcpu) |
3970 | { | |
3971 | if (!need_emulate_wbinvd(vcpu)) | |
3972 | return X86EMUL_CONTINUE; | |
3973 | ||
3974 | if (kvm_x86_ops->has_wbinvd_exit()) { | |
3975 | smp_call_function_many(vcpu->arch.wbinvd_dirty_mask, | |
3976 | wbinvd_ipi, NULL, 1); | |
3977 | cpumask_clear(vcpu->arch.wbinvd_dirty_mask); | |
3978 | } | |
3979 | wbinvd(); | |
3980 | return X86EMUL_CONTINUE; | |
3981 | } | |
3982 | EXPORT_SYMBOL_GPL(kvm_emulate_wbinvd); | |
3983 | ||
bbd9b64e CO |
3984 | int emulate_clts(struct kvm_vcpu *vcpu) |
3985 | { | |
4d4ec087 | 3986 | kvm_x86_ops->set_cr0(vcpu, kvm_read_cr0_bits(vcpu, ~X86_CR0_TS)); |
6b52d186 | 3987 | kvm_x86_ops->fpu_activate(vcpu); |
bbd9b64e CO |
3988 | return X86EMUL_CONTINUE; |
3989 | } | |
3990 | ||
35aa5375 | 3991 | int emulator_get_dr(int dr, unsigned long *dest, struct kvm_vcpu *vcpu) |
bbd9b64e | 3992 | { |
338dbc97 | 3993 | return _kvm_get_dr(vcpu, dr, dest); |
bbd9b64e CO |
3994 | } |
3995 | ||
35aa5375 | 3996 | int emulator_set_dr(int dr, unsigned long value, struct kvm_vcpu *vcpu) |
bbd9b64e | 3997 | { |
338dbc97 GN |
3998 | |
3999 | return __kvm_set_dr(vcpu, dr, value); | |
bbd9b64e CO |
4000 | } |
4001 | ||
52a46617 | 4002 | static u64 mk_cr_64(u64 curr_cr, u32 new_val) |
5fdbf976 | 4003 | { |
52a46617 | 4004 | return (curr_cr & ~((1ULL << 32) - 1)) | new_val; |
5fdbf976 MT |
4005 | } |
4006 | ||
52a46617 | 4007 | static unsigned long emulator_get_cr(int cr, struct kvm_vcpu *vcpu) |
bbd9b64e | 4008 | { |
52a46617 GN |
4009 | unsigned long value; |
4010 | ||
4011 | switch (cr) { | |
4012 | case 0: | |
4013 | value = kvm_read_cr0(vcpu); | |
4014 | break; | |
4015 | case 2: | |
4016 | value = vcpu->arch.cr2; | |
4017 | break; | |
4018 | case 3: | |
4019 | value = vcpu->arch.cr3; | |
4020 | break; | |
4021 | case 4: | |
4022 | value = kvm_read_cr4(vcpu); | |
4023 | break; | |
4024 | case 8: | |
4025 | value = kvm_get_cr8(vcpu); | |
4026 | break; | |
4027 | default: | |
4028 | vcpu_printf(vcpu, "%s: unexpected cr %u\n", __func__, cr); | |
4029 | return 0; | |
4030 | } | |
4031 | ||
4032 | return value; | |
4033 | } | |
4034 | ||
0f12244f | 4035 | static int emulator_set_cr(int cr, unsigned long val, struct kvm_vcpu *vcpu) |
52a46617 | 4036 | { |
0f12244f GN |
4037 | int res = 0; |
4038 | ||
52a46617 GN |
4039 | switch (cr) { |
4040 | case 0: | |
49a9b07e | 4041 | res = kvm_set_cr0(vcpu, mk_cr_64(kvm_read_cr0(vcpu), val)); |
52a46617 GN |
4042 | break; |
4043 | case 2: | |
4044 | vcpu->arch.cr2 = val; | |
4045 | break; | |
4046 | case 3: | |
2390218b | 4047 | res = kvm_set_cr3(vcpu, val); |
52a46617 GN |
4048 | break; |
4049 | case 4: | |
a83b29c6 | 4050 | res = kvm_set_cr4(vcpu, mk_cr_64(kvm_read_cr4(vcpu), val)); |
52a46617 GN |
4051 | break; |
4052 | case 8: | |
0f12244f | 4053 | res = __kvm_set_cr8(vcpu, val & 0xfUL); |
52a46617 GN |
4054 | break; |
4055 | default: | |
4056 | vcpu_printf(vcpu, "%s: unexpected cr %u\n", __func__, cr); | |
0f12244f | 4057 | res = -1; |
52a46617 | 4058 | } |
0f12244f GN |
4059 | |
4060 | return res; | |
52a46617 GN |
4061 | } |
4062 | ||
9c537244 GN |
4063 | static int emulator_get_cpl(struct kvm_vcpu *vcpu) |
4064 | { | |
4065 | return kvm_x86_ops->get_cpl(vcpu); | |
4066 | } | |
4067 | ||
2dafc6c2 GN |
4068 | static void emulator_get_gdt(struct desc_ptr *dt, struct kvm_vcpu *vcpu) |
4069 | { | |
4070 | kvm_x86_ops->get_gdt(vcpu, dt); | |
4071 | } | |
4072 | ||
160ce1f1 MG |
4073 | static void emulator_get_idt(struct desc_ptr *dt, struct kvm_vcpu *vcpu) |
4074 | { | |
4075 | kvm_x86_ops->get_idt(vcpu, dt); | |
4076 | } | |
4077 | ||
5951c442 GN |
4078 | static unsigned long emulator_get_cached_segment_base(int seg, |
4079 | struct kvm_vcpu *vcpu) | |
4080 | { | |
4081 | return get_segment_base(vcpu, seg); | |
4082 | } | |
4083 | ||
2dafc6c2 GN |
4084 | static bool emulator_get_cached_descriptor(struct desc_struct *desc, int seg, |
4085 | struct kvm_vcpu *vcpu) | |
4086 | { | |
4087 | struct kvm_segment var; | |
4088 | ||
4089 | kvm_get_segment(vcpu, &var, seg); | |
4090 | ||
4091 | if (var.unusable) | |
4092 | return false; | |
4093 | ||
4094 | if (var.g) | |
4095 | var.limit >>= 12; | |
4096 | set_desc_limit(desc, var.limit); | |
4097 | set_desc_base(desc, (unsigned long)var.base); | |
4098 | desc->type = var.type; | |
4099 | desc->s = var.s; | |
4100 | desc->dpl = var.dpl; | |
4101 | desc->p = var.present; | |
4102 | desc->avl = var.avl; | |
4103 | desc->l = var.l; | |
4104 | desc->d = var.db; | |
4105 | desc->g = var.g; | |
4106 | ||
4107 | return true; | |
4108 | } | |
4109 | ||
4110 | static void emulator_set_cached_descriptor(struct desc_struct *desc, int seg, | |
4111 | struct kvm_vcpu *vcpu) | |
4112 | { | |
4113 | struct kvm_segment var; | |
4114 | ||
4115 | /* needed to preserve selector */ | |
4116 | kvm_get_segment(vcpu, &var, seg); | |
4117 | ||
4118 | var.base = get_desc_base(desc); | |
4119 | var.limit = get_desc_limit(desc); | |
4120 | if (desc->g) | |
4121 | var.limit = (var.limit << 12) | 0xfff; | |
4122 | var.type = desc->type; | |
4123 | var.present = desc->p; | |
4124 | var.dpl = desc->dpl; | |
4125 | var.db = desc->d; | |
4126 | var.s = desc->s; | |
4127 | var.l = desc->l; | |
4128 | var.g = desc->g; | |
4129 | var.avl = desc->avl; | |
4130 | var.present = desc->p; | |
4131 | var.unusable = !var.present; | |
4132 | var.padding = 0; | |
4133 | ||
4134 | kvm_set_segment(vcpu, &var, seg); | |
4135 | return; | |
4136 | } | |
4137 | ||
4138 | static u16 emulator_get_segment_selector(int seg, struct kvm_vcpu *vcpu) | |
4139 | { | |
4140 | struct kvm_segment kvm_seg; | |
4141 | ||
4142 | kvm_get_segment(vcpu, &kvm_seg, seg); | |
4143 | return kvm_seg.selector; | |
4144 | } | |
4145 | ||
4146 | static void emulator_set_segment_selector(u16 sel, int seg, | |
4147 | struct kvm_vcpu *vcpu) | |
4148 | { | |
4149 | struct kvm_segment kvm_seg; | |
4150 | ||
4151 | kvm_get_segment(vcpu, &kvm_seg, seg); | |
4152 | kvm_seg.selector = sel; | |
4153 | kvm_set_segment(vcpu, &kvm_seg, seg); | |
4154 | } | |
4155 | ||
14af3f3c | 4156 | static struct x86_emulate_ops emulate_ops = { |
1871c602 | 4157 | .read_std = kvm_read_guest_virt_system, |
2dafc6c2 | 4158 | .write_std = kvm_write_guest_virt_system, |
1871c602 | 4159 | .fetch = kvm_fetch_guest_virt, |
bbd9b64e CO |
4160 | .read_emulated = emulator_read_emulated, |
4161 | .write_emulated = emulator_write_emulated, | |
4162 | .cmpxchg_emulated = emulator_cmpxchg_emulated, | |
cf8f70bf GN |
4163 | .pio_in_emulated = emulator_pio_in_emulated, |
4164 | .pio_out_emulated = emulator_pio_out_emulated, | |
2dafc6c2 GN |
4165 | .get_cached_descriptor = emulator_get_cached_descriptor, |
4166 | .set_cached_descriptor = emulator_set_cached_descriptor, | |
4167 | .get_segment_selector = emulator_get_segment_selector, | |
4168 | .set_segment_selector = emulator_set_segment_selector, | |
5951c442 | 4169 | .get_cached_segment_base = emulator_get_cached_segment_base, |
2dafc6c2 | 4170 | .get_gdt = emulator_get_gdt, |
160ce1f1 | 4171 | .get_idt = emulator_get_idt, |
52a46617 GN |
4172 | .get_cr = emulator_get_cr, |
4173 | .set_cr = emulator_set_cr, | |
9c537244 | 4174 | .cpl = emulator_get_cpl, |
35aa5375 GN |
4175 | .get_dr = emulator_get_dr, |
4176 | .set_dr = emulator_set_dr, | |
3fb1b5db GN |
4177 | .set_msr = kvm_set_msr, |
4178 | .get_msr = kvm_get_msr, | |
bbd9b64e CO |
4179 | }; |
4180 | ||
5fdbf976 MT |
4181 | static void cache_all_regs(struct kvm_vcpu *vcpu) |
4182 | { | |
4183 | kvm_register_read(vcpu, VCPU_REGS_RAX); | |
4184 | kvm_register_read(vcpu, VCPU_REGS_RSP); | |
4185 | kvm_register_read(vcpu, VCPU_REGS_RIP); | |
4186 | vcpu->arch.regs_dirty = ~0; | |
4187 | } | |
4188 | ||
95cb2295 GN |
4189 | static void toggle_interruptibility(struct kvm_vcpu *vcpu, u32 mask) |
4190 | { | |
4191 | u32 int_shadow = kvm_x86_ops->get_interrupt_shadow(vcpu, mask); | |
4192 | /* | |
4193 | * an sti; sti; sequence only disable interrupts for the first | |
4194 | * instruction. So, if the last instruction, be it emulated or | |
4195 | * not, left the system with the INT_STI flag enabled, it | |
4196 | * means that the last instruction is an sti. We should not | |
4197 | * leave the flag on in this case. The same goes for mov ss | |
4198 | */ | |
4199 | if (!(int_shadow & mask)) | |
4200 | kvm_x86_ops->set_interrupt_shadow(vcpu, mask); | |
4201 | } | |
4202 | ||
54b8486f GN |
4203 | static void inject_emulated_exception(struct kvm_vcpu *vcpu) |
4204 | { | |
4205 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; | |
4206 | if (ctxt->exception == PF_VECTOR) | |
d4f8cf66 | 4207 | kvm_propagate_fault(vcpu); |
54b8486f GN |
4208 | else if (ctxt->error_code_valid) |
4209 | kvm_queue_exception_e(vcpu, ctxt->exception, ctxt->error_code); | |
4210 | else | |
4211 | kvm_queue_exception(vcpu, ctxt->exception); | |
4212 | } | |
4213 | ||
8ec4722d MG |
4214 | static void init_emulate_ctxt(struct kvm_vcpu *vcpu) |
4215 | { | |
4216 | struct decode_cache *c = &vcpu->arch.emulate_ctxt.decode; | |
4217 | int cs_db, cs_l; | |
4218 | ||
4219 | cache_all_regs(vcpu); | |
4220 | ||
4221 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); | |
4222 | ||
4223 | vcpu->arch.emulate_ctxt.vcpu = vcpu; | |
4224 | vcpu->arch.emulate_ctxt.eflags = kvm_x86_ops->get_rflags(vcpu); | |
4225 | vcpu->arch.emulate_ctxt.eip = kvm_rip_read(vcpu); | |
4226 | vcpu->arch.emulate_ctxt.mode = | |
4227 | (!is_protmode(vcpu)) ? X86EMUL_MODE_REAL : | |
4228 | (vcpu->arch.emulate_ctxt.eflags & X86_EFLAGS_VM) | |
4229 | ? X86EMUL_MODE_VM86 : cs_l | |
4230 | ? X86EMUL_MODE_PROT64 : cs_db | |
4231 | ? X86EMUL_MODE_PROT32 : X86EMUL_MODE_PROT16; | |
4232 | memset(c, 0, sizeof(struct decode_cache)); | |
4233 | memcpy(c->regs, vcpu->arch.regs, sizeof c->regs); | |
4234 | } | |
4235 | ||
63995653 MG |
4236 | int kvm_inject_realmode_interrupt(struct kvm_vcpu *vcpu, int irq) |
4237 | { | |
4238 | struct decode_cache *c = &vcpu->arch.emulate_ctxt.decode; | |
4239 | int ret; | |
4240 | ||
4241 | init_emulate_ctxt(vcpu); | |
4242 | ||
4243 | vcpu->arch.emulate_ctxt.decode.op_bytes = 2; | |
4244 | vcpu->arch.emulate_ctxt.decode.ad_bytes = 2; | |
4245 | vcpu->arch.emulate_ctxt.decode.eip = vcpu->arch.emulate_ctxt.eip; | |
4246 | ret = emulate_int_real(&vcpu->arch.emulate_ctxt, &emulate_ops, irq); | |
4247 | ||
4248 | if (ret != X86EMUL_CONTINUE) | |
4249 | return EMULATE_FAIL; | |
4250 | ||
4251 | vcpu->arch.emulate_ctxt.eip = c->eip; | |
4252 | memcpy(vcpu->arch.regs, c->regs, sizeof c->regs); | |
4253 | kvm_rip_write(vcpu, vcpu->arch.emulate_ctxt.eip); | |
4254 | kvm_x86_ops->set_rflags(vcpu, vcpu->arch.emulate_ctxt.eflags); | |
4255 | ||
4256 | if (irq == NMI_VECTOR) | |
4257 | vcpu->arch.nmi_pending = false; | |
4258 | else | |
4259 | vcpu->arch.interrupt.pending = false; | |
4260 | ||
4261 | return EMULATE_DONE; | |
4262 | } | |
4263 | EXPORT_SYMBOL_GPL(kvm_inject_realmode_interrupt); | |
4264 | ||
6d77dbfc GN |
4265 | static int handle_emulation_failure(struct kvm_vcpu *vcpu) |
4266 | { | |
6d77dbfc GN |
4267 | ++vcpu->stat.insn_emulation_fail; |
4268 | trace_kvm_emulate_insn_failed(vcpu); | |
4269 | vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR; | |
4270 | vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION; | |
4271 | vcpu->run->internal.ndata = 0; | |
4272 | kvm_queue_exception(vcpu, UD_VECTOR); | |
4273 | return EMULATE_FAIL; | |
4274 | } | |
4275 | ||
a6f177ef GN |
4276 | static bool reexecute_instruction(struct kvm_vcpu *vcpu, gva_t gva) |
4277 | { | |
4278 | gpa_t gpa; | |
4279 | ||
68be0803 GN |
4280 | if (tdp_enabled) |
4281 | return false; | |
4282 | ||
a6f177ef GN |
4283 | /* |
4284 | * if emulation was due to access to shadowed page table | |
4285 | * and it failed try to unshadow page and re-entetr the | |
4286 | * guest to let CPU execute the instruction. | |
4287 | */ | |
4288 | if (kvm_mmu_unprotect_page_virt(vcpu, gva)) | |
4289 | return true; | |
4290 | ||
4291 | gpa = kvm_mmu_gva_to_gpa_system(vcpu, gva, NULL); | |
4292 | ||
4293 | if (gpa == UNMAPPED_GVA) | |
4294 | return true; /* let cpu generate fault */ | |
4295 | ||
4296 | if (!kvm_is_error_hva(gfn_to_hva(vcpu->kvm, gpa >> PAGE_SHIFT))) | |
4297 | return true; | |
4298 | ||
4299 | return false; | |
4300 | } | |
4301 | ||
bbd9b64e | 4302 | int emulate_instruction(struct kvm_vcpu *vcpu, |
bbd9b64e CO |
4303 | unsigned long cr2, |
4304 | u16 error_code, | |
571008da | 4305 | int emulation_type) |
bbd9b64e | 4306 | { |
95cb2295 | 4307 | int r; |
4d2179e1 | 4308 | struct decode_cache *c = &vcpu->arch.emulate_ctxt.decode; |
bbd9b64e | 4309 | |
26eef70c | 4310 | kvm_clear_exception_queue(vcpu); |
ad312c7c | 4311 | vcpu->arch.mmio_fault_cr2 = cr2; |
5fdbf976 | 4312 | /* |
56e82318 | 4313 | * TODO: fix emulate.c to use guest_read/write_register |
5fdbf976 MT |
4314 | * instead of direct ->regs accesses, can save hundred cycles |
4315 | * on Intel for instructions that don't read/change RSP, for | |
4316 | * for example. | |
4317 | */ | |
4318 | cache_all_regs(vcpu); | |
bbd9b64e | 4319 | |
571008da | 4320 | if (!(emulation_type & EMULTYPE_NO_DECODE)) { |
8ec4722d | 4321 | init_emulate_ctxt(vcpu); |
95cb2295 | 4322 | vcpu->arch.emulate_ctxt.interruptibility = 0; |
54b8486f | 4323 | vcpu->arch.emulate_ctxt.exception = -1; |
4fc40f07 | 4324 | vcpu->arch.emulate_ctxt.perm_ok = false; |
bbd9b64e | 4325 | |
9aabc88f | 4326 | r = x86_decode_insn(&vcpu->arch.emulate_ctxt); |
d47f00a6 JR |
4327 | if (r == X86EMUL_PROPAGATE_FAULT) |
4328 | goto done; | |
bbd9b64e | 4329 | |
e46479f8 | 4330 | trace_kvm_emulate_insn_start(vcpu); |
571008da | 4331 | |
0cb5762e AP |
4332 | /* Only allow emulation of specific instructions on #UD |
4333 | * (namely VMMCALL, sysenter, sysexit, syscall)*/ | |
0cb5762e AP |
4334 | if (emulation_type & EMULTYPE_TRAP_UD) { |
4335 | if (!c->twobyte) | |
4336 | return EMULATE_FAIL; | |
4337 | switch (c->b) { | |
4338 | case 0x01: /* VMMCALL */ | |
4339 | if (c->modrm_mod != 3 || c->modrm_rm != 1) | |
4340 | return EMULATE_FAIL; | |
4341 | break; | |
4342 | case 0x34: /* sysenter */ | |
4343 | case 0x35: /* sysexit */ | |
4344 | if (c->modrm_mod != 0 || c->modrm_rm != 0) | |
4345 | return EMULATE_FAIL; | |
4346 | break; | |
4347 | case 0x05: /* syscall */ | |
4348 | if (c->modrm_mod != 0 || c->modrm_rm != 0) | |
4349 | return EMULATE_FAIL; | |
4350 | break; | |
4351 | default: | |
4352 | return EMULATE_FAIL; | |
4353 | } | |
4354 | ||
4355 | if (!(c->modrm_reg == 0 || c->modrm_reg == 3)) | |
4356 | return EMULATE_FAIL; | |
4357 | } | |
571008da | 4358 | |
f2b5756b | 4359 | ++vcpu->stat.insn_emulation; |
bbd9b64e | 4360 | if (r) { |
a6f177ef | 4361 | if (reexecute_instruction(vcpu, cr2)) |
bbd9b64e | 4362 | return EMULATE_DONE; |
6d77dbfc GN |
4363 | if (emulation_type & EMULTYPE_SKIP) |
4364 | return EMULATE_FAIL; | |
4365 | return handle_emulation_failure(vcpu); | |
bbd9b64e CO |
4366 | } |
4367 | } | |
4368 | ||
ba8afb6b GN |
4369 | if (emulation_type & EMULTYPE_SKIP) { |
4370 | kvm_rip_write(vcpu, vcpu->arch.emulate_ctxt.decode.eip); | |
4371 | return EMULATE_DONE; | |
4372 | } | |
4373 | ||
4d2179e1 GN |
4374 | /* this is needed for vmware backdor interface to work since it |
4375 | changes registers values during IO operation */ | |
4376 | memcpy(c->regs, vcpu->arch.regs, sizeof c->regs); | |
4377 | ||
5cd21917 | 4378 | restart: |
9aabc88f | 4379 | r = x86_emulate_insn(&vcpu->arch.emulate_ctxt); |
bbd9b64e | 4380 | |
d2ddd1c4 | 4381 | if (r == EMULATION_FAILED) { |
a6f177ef | 4382 | if (reexecute_instruction(vcpu, cr2)) |
c3cd7ffa GN |
4383 | return EMULATE_DONE; |
4384 | ||
6d77dbfc | 4385 | return handle_emulation_failure(vcpu); |
bbd9b64e CO |
4386 | } |
4387 | ||
d47f00a6 | 4388 | done: |
54b8486f GN |
4389 | if (vcpu->arch.emulate_ctxt.exception >= 0) { |
4390 | inject_emulated_exception(vcpu); | |
d2ddd1c4 GN |
4391 | r = EMULATE_DONE; |
4392 | } else if (vcpu->arch.pio.count) { | |
3457e419 GN |
4393 | if (!vcpu->arch.pio.in) |
4394 | vcpu->arch.pio.count = 0; | |
e85d28f8 GN |
4395 | r = EMULATE_DO_MMIO; |
4396 | } else if (vcpu->mmio_needed) { | |
3457e419 GN |
4397 | if (vcpu->mmio_is_write) |
4398 | vcpu->mmio_needed = 0; | |
e85d28f8 | 4399 | r = EMULATE_DO_MMIO; |
d2ddd1c4 | 4400 | } else if (r == EMULATION_RESTART) |
5cd21917 | 4401 | goto restart; |
d2ddd1c4 GN |
4402 | else |
4403 | r = EMULATE_DONE; | |
f850e2e6 | 4404 | |
e85d28f8 GN |
4405 | toggle_interruptibility(vcpu, vcpu->arch.emulate_ctxt.interruptibility); |
4406 | kvm_x86_ops->set_rflags(vcpu, vcpu->arch.emulate_ctxt.eflags); | |
3842d135 | 4407 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
e85d28f8 GN |
4408 | memcpy(vcpu->arch.regs, c->regs, sizeof c->regs); |
4409 | kvm_rip_write(vcpu, vcpu->arch.emulate_ctxt.eip); | |
4410 | ||
4411 | return r; | |
de7d789a | 4412 | } |
bbd9b64e | 4413 | EXPORT_SYMBOL_GPL(emulate_instruction); |
de7d789a | 4414 | |
cf8f70bf | 4415 | int kvm_fast_pio_out(struct kvm_vcpu *vcpu, int size, unsigned short port) |
de7d789a | 4416 | { |
cf8f70bf GN |
4417 | unsigned long val = kvm_register_read(vcpu, VCPU_REGS_RAX); |
4418 | int ret = emulator_pio_out_emulated(size, port, &val, 1, vcpu); | |
4419 | /* do not return to emulator after return from userspace */ | |
7972995b | 4420 | vcpu->arch.pio.count = 0; |
de7d789a CO |
4421 | return ret; |
4422 | } | |
cf8f70bf | 4423 | EXPORT_SYMBOL_GPL(kvm_fast_pio_out); |
de7d789a | 4424 | |
8cfdc000 ZA |
4425 | static void tsc_bad(void *info) |
4426 | { | |
4427 | __get_cpu_var(cpu_tsc_khz) = 0; | |
4428 | } | |
4429 | ||
4430 | static void tsc_khz_changed(void *data) | |
c8076604 | 4431 | { |
8cfdc000 ZA |
4432 | struct cpufreq_freqs *freq = data; |
4433 | unsigned long khz = 0; | |
4434 | ||
4435 | if (data) | |
4436 | khz = freq->new; | |
4437 | else if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) | |
4438 | khz = cpufreq_quick_get(raw_smp_processor_id()); | |
4439 | if (!khz) | |
4440 | khz = tsc_khz; | |
4441 | __get_cpu_var(cpu_tsc_khz) = khz; | |
c8076604 GH |
4442 | } |
4443 | ||
c8076604 GH |
4444 | static int kvmclock_cpufreq_notifier(struct notifier_block *nb, unsigned long val, |
4445 | void *data) | |
4446 | { | |
4447 | struct cpufreq_freqs *freq = data; | |
4448 | struct kvm *kvm; | |
4449 | struct kvm_vcpu *vcpu; | |
4450 | int i, send_ipi = 0; | |
4451 | ||
8cfdc000 ZA |
4452 | /* |
4453 | * We allow guests to temporarily run on slowing clocks, | |
4454 | * provided we notify them after, or to run on accelerating | |
4455 | * clocks, provided we notify them before. Thus time never | |
4456 | * goes backwards. | |
4457 | * | |
4458 | * However, we have a problem. We can't atomically update | |
4459 | * the frequency of a given CPU from this function; it is | |
4460 | * merely a notifier, which can be called from any CPU. | |
4461 | * Changing the TSC frequency at arbitrary points in time | |
4462 | * requires a recomputation of local variables related to | |
4463 | * the TSC for each VCPU. We must flag these local variables | |
4464 | * to be updated and be sure the update takes place with the | |
4465 | * new frequency before any guests proceed. | |
4466 | * | |
4467 | * Unfortunately, the combination of hotplug CPU and frequency | |
4468 | * change creates an intractable locking scenario; the order | |
4469 | * of when these callouts happen is undefined with respect to | |
4470 | * CPU hotplug, and they can race with each other. As such, | |
4471 | * merely setting per_cpu(cpu_tsc_khz) = X during a hotadd is | |
4472 | * undefined; you can actually have a CPU frequency change take | |
4473 | * place in between the computation of X and the setting of the | |
4474 | * variable. To protect against this problem, all updates of | |
4475 | * the per_cpu tsc_khz variable are done in an interrupt | |
4476 | * protected IPI, and all callers wishing to update the value | |
4477 | * must wait for a synchronous IPI to complete (which is trivial | |
4478 | * if the caller is on the CPU already). This establishes the | |
4479 | * necessary total order on variable updates. | |
4480 | * | |
4481 | * Note that because a guest time update may take place | |
4482 | * anytime after the setting of the VCPU's request bit, the | |
4483 | * correct TSC value must be set before the request. However, | |
4484 | * to ensure the update actually makes it to any guest which | |
4485 | * starts running in hardware virtualization between the set | |
4486 | * and the acquisition of the spinlock, we must also ping the | |
4487 | * CPU after setting the request bit. | |
4488 | * | |
4489 | */ | |
4490 | ||
c8076604 GH |
4491 | if (val == CPUFREQ_PRECHANGE && freq->old > freq->new) |
4492 | return 0; | |
4493 | if (val == CPUFREQ_POSTCHANGE && freq->old < freq->new) | |
4494 | return 0; | |
8cfdc000 ZA |
4495 | |
4496 | smp_call_function_single(freq->cpu, tsc_khz_changed, freq, 1); | |
c8076604 GH |
4497 | |
4498 | spin_lock(&kvm_lock); | |
4499 | list_for_each_entry(kvm, &vm_list, vm_list) { | |
988a2cae | 4500 | kvm_for_each_vcpu(i, vcpu, kvm) { |
c8076604 GH |
4501 | if (vcpu->cpu != freq->cpu) |
4502 | continue; | |
c285545f | 4503 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
c8076604 | 4504 | if (vcpu->cpu != smp_processor_id()) |
8cfdc000 | 4505 | send_ipi = 1; |
c8076604 GH |
4506 | } |
4507 | } | |
4508 | spin_unlock(&kvm_lock); | |
4509 | ||
4510 | if (freq->old < freq->new && send_ipi) { | |
4511 | /* | |
4512 | * We upscale the frequency. Must make the guest | |
4513 | * doesn't see old kvmclock values while running with | |
4514 | * the new frequency, otherwise we risk the guest sees | |
4515 | * time go backwards. | |
4516 | * | |
4517 | * In case we update the frequency for another cpu | |
4518 | * (which might be in guest context) send an interrupt | |
4519 | * to kick the cpu out of guest context. Next time | |
4520 | * guest context is entered kvmclock will be updated, | |
4521 | * so the guest will not see stale values. | |
4522 | */ | |
8cfdc000 | 4523 | smp_call_function_single(freq->cpu, tsc_khz_changed, freq, 1); |
c8076604 GH |
4524 | } |
4525 | return 0; | |
4526 | } | |
4527 | ||
4528 | static struct notifier_block kvmclock_cpufreq_notifier_block = { | |
8cfdc000 ZA |
4529 | .notifier_call = kvmclock_cpufreq_notifier |
4530 | }; | |
4531 | ||
4532 | static int kvmclock_cpu_notifier(struct notifier_block *nfb, | |
4533 | unsigned long action, void *hcpu) | |
4534 | { | |
4535 | unsigned int cpu = (unsigned long)hcpu; | |
4536 | ||
4537 | switch (action) { | |
4538 | case CPU_ONLINE: | |
4539 | case CPU_DOWN_FAILED: | |
4540 | smp_call_function_single(cpu, tsc_khz_changed, NULL, 1); | |
4541 | break; | |
4542 | case CPU_DOWN_PREPARE: | |
4543 | smp_call_function_single(cpu, tsc_bad, NULL, 1); | |
4544 | break; | |
4545 | } | |
4546 | return NOTIFY_OK; | |
4547 | } | |
4548 | ||
4549 | static struct notifier_block kvmclock_cpu_notifier_block = { | |
4550 | .notifier_call = kvmclock_cpu_notifier, | |
4551 | .priority = -INT_MAX | |
c8076604 GH |
4552 | }; |
4553 | ||
b820cc0c ZA |
4554 | static void kvm_timer_init(void) |
4555 | { | |
4556 | int cpu; | |
4557 | ||
c285545f | 4558 | max_tsc_khz = tsc_khz; |
8cfdc000 | 4559 | register_hotcpu_notifier(&kvmclock_cpu_notifier_block); |
b820cc0c | 4560 | if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) { |
c285545f ZA |
4561 | #ifdef CONFIG_CPU_FREQ |
4562 | struct cpufreq_policy policy; | |
4563 | memset(&policy, 0, sizeof(policy)); | |
4564 | cpufreq_get_policy(&policy, get_cpu()); | |
4565 | if (policy.cpuinfo.max_freq) | |
4566 | max_tsc_khz = policy.cpuinfo.max_freq; | |
4567 | #endif | |
b820cc0c ZA |
4568 | cpufreq_register_notifier(&kvmclock_cpufreq_notifier_block, |
4569 | CPUFREQ_TRANSITION_NOTIFIER); | |
4570 | } | |
c285545f | 4571 | pr_debug("kvm: max_tsc_khz = %ld\n", max_tsc_khz); |
8cfdc000 ZA |
4572 | for_each_online_cpu(cpu) |
4573 | smp_call_function_single(cpu, tsc_khz_changed, NULL, 1); | |
b820cc0c ZA |
4574 | } |
4575 | ||
ff9d07a0 ZY |
4576 | static DEFINE_PER_CPU(struct kvm_vcpu *, current_vcpu); |
4577 | ||
4578 | static int kvm_is_in_guest(void) | |
4579 | { | |
4580 | return percpu_read(current_vcpu) != NULL; | |
4581 | } | |
4582 | ||
4583 | static int kvm_is_user_mode(void) | |
4584 | { | |
4585 | int user_mode = 3; | |
dcf46b94 | 4586 | |
ff9d07a0 ZY |
4587 | if (percpu_read(current_vcpu)) |
4588 | user_mode = kvm_x86_ops->get_cpl(percpu_read(current_vcpu)); | |
dcf46b94 | 4589 | |
ff9d07a0 ZY |
4590 | return user_mode != 0; |
4591 | } | |
4592 | ||
4593 | static unsigned long kvm_get_guest_ip(void) | |
4594 | { | |
4595 | unsigned long ip = 0; | |
dcf46b94 | 4596 | |
ff9d07a0 ZY |
4597 | if (percpu_read(current_vcpu)) |
4598 | ip = kvm_rip_read(percpu_read(current_vcpu)); | |
dcf46b94 | 4599 | |
ff9d07a0 ZY |
4600 | return ip; |
4601 | } | |
4602 | ||
4603 | static struct perf_guest_info_callbacks kvm_guest_cbs = { | |
4604 | .is_in_guest = kvm_is_in_guest, | |
4605 | .is_user_mode = kvm_is_user_mode, | |
4606 | .get_guest_ip = kvm_get_guest_ip, | |
4607 | }; | |
4608 | ||
4609 | void kvm_before_handle_nmi(struct kvm_vcpu *vcpu) | |
4610 | { | |
4611 | percpu_write(current_vcpu, vcpu); | |
4612 | } | |
4613 | EXPORT_SYMBOL_GPL(kvm_before_handle_nmi); | |
4614 | ||
4615 | void kvm_after_handle_nmi(struct kvm_vcpu *vcpu) | |
4616 | { | |
4617 | percpu_write(current_vcpu, NULL); | |
4618 | } | |
4619 | EXPORT_SYMBOL_GPL(kvm_after_handle_nmi); | |
4620 | ||
f8c16bba | 4621 | int kvm_arch_init(void *opaque) |
043405e1 | 4622 | { |
b820cc0c | 4623 | int r; |
f8c16bba ZX |
4624 | struct kvm_x86_ops *ops = (struct kvm_x86_ops *)opaque; |
4625 | ||
f8c16bba ZX |
4626 | if (kvm_x86_ops) { |
4627 | printk(KERN_ERR "kvm: already loaded the other module\n"); | |
56c6d28a ZX |
4628 | r = -EEXIST; |
4629 | goto out; | |
f8c16bba ZX |
4630 | } |
4631 | ||
4632 | if (!ops->cpu_has_kvm_support()) { | |
4633 | printk(KERN_ERR "kvm: no hardware support\n"); | |
56c6d28a ZX |
4634 | r = -EOPNOTSUPP; |
4635 | goto out; | |
f8c16bba ZX |
4636 | } |
4637 | if (ops->disabled_by_bios()) { | |
4638 | printk(KERN_ERR "kvm: disabled by bios\n"); | |
56c6d28a ZX |
4639 | r = -EOPNOTSUPP; |
4640 | goto out; | |
f8c16bba ZX |
4641 | } |
4642 | ||
97db56ce AK |
4643 | r = kvm_mmu_module_init(); |
4644 | if (r) | |
4645 | goto out; | |
4646 | ||
4647 | kvm_init_msr_list(); | |
4648 | ||
f8c16bba | 4649 | kvm_x86_ops = ops; |
56c6d28a | 4650 | kvm_mmu_set_nonpresent_ptes(0ull, 0ull); |
7b52345e SY |
4651 | kvm_mmu_set_base_ptes(PT_PRESENT_MASK); |
4652 | kvm_mmu_set_mask_ptes(PT_USER_MASK, PT_ACCESSED_MASK, | |
4b12f0de | 4653 | PT_DIRTY_MASK, PT64_NX_MASK, 0); |
c8076604 | 4654 | |
b820cc0c | 4655 | kvm_timer_init(); |
c8076604 | 4656 | |
ff9d07a0 ZY |
4657 | perf_register_guest_info_callbacks(&kvm_guest_cbs); |
4658 | ||
2acf923e DC |
4659 | if (cpu_has_xsave) |
4660 | host_xcr0 = xgetbv(XCR_XFEATURE_ENABLED_MASK); | |
4661 | ||
f8c16bba | 4662 | return 0; |
56c6d28a ZX |
4663 | |
4664 | out: | |
56c6d28a | 4665 | return r; |
043405e1 | 4666 | } |
8776e519 | 4667 | |
f8c16bba ZX |
4668 | void kvm_arch_exit(void) |
4669 | { | |
ff9d07a0 ZY |
4670 | perf_unregister_guest_info_callbacks(&kvm_guest_cbs); |
4671 | ||
888d256e JK |
4672 | if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) |
4673 | cpufreq_unregister_notifier(&kvmclock_cpufreq_notifier_block, | |
4674 | CPUFREQ_TRANSITION_NOTIFIER); | |
8cfdc000 | 4675 | unregister_hotcpu_notifier(&kvmclock_cpu_notifier_block); |
f8c16bba | 4676 | kvm_x86_ops = NULL; |
56c6d28a ZX |
4677 | kvm_mmu_module_exit(); |
4678 | } | |
f8c16bba | 4679 | |
8776e519 HB |
4680 | int kvm_emulate_halt(struct kvm_vcpu *vcpu) |
4681 | { | |
4682 | ++vcpu->stat.halt_exits; | |
4683 | if (irqchip_in_kernel(vcpu->kvm)) { | |
a4535290 | 4684 | vcpu->arch.mp_state = KVM_MP_STATE_HALTED; |
8776e519 HB |
4685 | return 1; |
4686 | } else { | |
4687 | vcpu->run->exit_reason = KVM_EXIT_HLT; | |
4688 | return 0; | |
4689 | } | |
4690 | } | |
4691 | EXPORT_SYMBOL_GPL(kvm_emulate_halt); | |
4692 | ||
2f333bcb MT |
4693 | static inline gpa_t hc_gpa(struct kvm_vcpu *vcpu, unsigned long a0, |
4694 | unsigned long a1) | |
4695 | { | |
4696 | if (is_long_mode(vcpu)) | |
4697 | return a0; | |
4698 | else | |
4699 | return a0 | ((gpa_t)a1 << 32); | |
4700 | } | |
4701 | ||
55cd8e5a GN |
4702 | int kvm_hv_hypercall(struct kvm_vcpu *vcpu) |
4703 | { | |
4704 | u64 param, ingpa, outgpa, ret; | |
4705 | uint16_t code, rep_idx, rep_cnt, res = HV_STATUS_SUCCESS, rep_done = 0; | |
4706 | bool fast, longmode; | |
4707 | int cs_db, cs_l; | |
4708 | ||
4709 | /* | |
4710 | * hypercall generates UD from non zero cpl and real mode | |
4711 | * per HYPER-V spec | |
4712 | */ | |
3eeb3288 | 4713 | if (kvm_x86_ops->get_cpl(vcpu) != 0 || !is_protmode(vcpu)) { |
55cd8e5a GN |
4714 | kvm_queue_exception(vcpu, UD_VECTOR); |
4715 | return 0; | |
4716 | } | |
4717 | ||
4718 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); | |
4719 | longmode = is_long_mode(vcpu) && cs_l == 1; | |
4720 | ||
4721 | if (!longmode) { | |
ccd46936 GN |
4722 | param = ((u64)kvm_register_read(vcpu, VCPU_REGS_RDX) << 32) | |
4723 | (kvm_register_read(vcpu, VCPU_REGS_RAX) & 0xffffffff); | |
4724 | ingpa = ((u64)kvm_register_read(vcpu, VCPU_REGS_RBX) << 32) | | |
4725 | (kvm_register_read(vcpu, VCPU_REGS_RCX) & 0xffffffff); | |
4726 | outgpa = ((u64)kvm_register_read(vcpu, VCPU_REGS_RDI) << 32) | | |
4727 | (kvm_register_read(vcpu, VCPU_REGS_RSI) & 0xffffffff); | |
55cd8e5a GN |
4728 | } |
4729 | #ifdef CONFIG_X86_64 | |
4730 | else { | |
4731 | param = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
4732 | ingpa = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
4733 | outgpa = kvm_register_read(vcpu, VCPU_REGS_R8); | |
4734 | } | |
4735 | #endif | |
4736 | ||
4737 | code = param & 0xffff; | |
4738 | fast = (param >> 16) & 0x1; | |
4739 | rep_cnt = (param >> 32) & 0xfff; | |
4740 | rep_idx = (param >> 48) & 0xfff; | |
4741 | ||
4742 | trace_kvm_hv_hypercall(code, fast, rep_cnt, rep_idx, ingpa, outgpa); | |
4743 | ||
c25bc163 GN |
4744 | switch (code) { |
4745 | case HV_X64_HV_NOTIFY_LONG_SPIN_WAIT: | |
4746 | kvm_vcpu_on_spin(vcpu); | |
4747 | break; | |
4748 | default: | |
4749 | res = HV_STATUS_INVALID_HYPERCALL_CODE; | |
4750 | break; | |
4751 | } | |
55cd8e5a GN |
4752 | |
4753 | ret = res | (((u64)rep_done & 0xfff) << 32); | |
4754 | if (longmode) { | |
4755 | kvm_register_write(vcpu, VCPU_REGS_RAX, ret); | |
4756 | } else { | |
4757 | kvm_register_write(vcpu, VCPU_REGS_RDX, ret >> 32); | |
4758 | kvm_register_write(vcpu, VCPU_REGS_RAX, ret & 0xffffffff); | |
4759 | } | |
4760 | ||
4761 | return 1; | |
4762 | } | |
4763 | ||
8776e519 HB |
4764 | int kvm_emulate_hypercall(struct kvm_vcpu *vcpu) |
4765 | { | |
4766 | unsigned long nr, a0, a1, a2, a3, ret; | |
2f333bcb | 4767 | int r = 1; |
8776e519 | 4768 | |
55cd8e5a GN |
4769 | if (kvm_hv_hypercall_enabled(vcpu->kvm)) |
4770 | return kvm_hv_hypercall(vcpu); | |
4771 | ||
5fdbf976 MT |
4772 | nr = kvm_register_read(vcpu, VCPU_REGS_RAX); |
4773 | a0 = kvm_register_read(vcpu, VCPU_REGS_RBX); | |
4774 | a1 = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
4775 | a2 = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
4776 | a3 = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
8776e519 | 4777 | |
229456fc | 4778 | trace_kvm_hypercall(nr, a0, a1, a2, a3); |
2714d1d3 | 4779 | |
8776e519 HB |
4780 | if (!is_long_mode(vcpu)) { |
4781 | nr &= 0xFFFFFFFF; | |
4782 | a0 &= 0xFFFFFFFF; | |
4783 | a1 &= 0xFFFFFFFF; | |
4784 | a2 &= 0xFFFFFFFF; | |
4785 | a3 &= 0xFFFFFFFF; | |
4786 | } | |
4787 | ||
07708c4a JK |
4788 | if (kvm_x86_ops->get_cpl(vcpu) != 0) { |
4789 | ret = -KVM_EPERM; | |
4790 | goto out; | |
4791 | } | |
4792 | ||
8776e519 | 4793 | switch (nr) { |
b93463aa AK |
4794 | case KVM_HC_VAPIC_POLL_IRQ: |
4795 | ret = 0; | |
4796 | break; | |
2f333bcb MT |
4797 | case KVM_HC_MMU_OP: |
4798 | r = kvm_pv_mmu_op(vcpu, a0, hc_gpa(vcpu, a1, a2), &ret); | |
4799 | break; | |
8776e519 HB |
4800 | default: |
4801 | ret = -KVM_ENOSYS; | |
4802 | break; | |
4803 | } | |
07708c4a | 4804 | out: |
5fdbf976 | 4805 | kvm_register_write(vcpu, VCPU_REGS_RAX, ret); |
f11c3a8d | 4806 | ++vcpu->stat.hypercalls; |
2f333bcb | 4807 | return r; |
8776e519 HB |
4808 | } |
4809 | EXPORT_SYMBOL_GPL(kvm_emulate_hypercall); | |
4810 | ||
4811 | int kvm_fix_hypercall(struct kvm_vcpu *vcpu) | |
4812 | { | |
4813 | char instruction[3]; | |
5fdbf976 | 4814 | unsigned long rip = kvm_rip_read(vcpu); |
8776e519 | 4815 | |
8776e519 HB |
4816 | /* |
4817 | * Blow out the MMU to ensure that no other VCPU has an active mapping | |
4818 | * to ensure that the updated hypercall appears atomically across all | |
4819 | * VCPUs. | |
4820 | */ | |
4821 | kvm_mmu_zap_all(vcpu->kvm); | |
4822 | ||
8776e519 | 4823 | kvm_x86_ops->patch_hypercall(vcpu, instruction); |
8776e519 | 4824 | |
8fe681e9 | 4825 | return emulator_write_emulated(rip, instruction, 3, NULL, vcpu); |
8776e519 HB |
4826 | } |
4827 | ||
8776e519 HB |
4828 | void realmode_lgdt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base) |
4829 | { | |
89a27f4d | 4830 | struct desc_ptr dt = { limit, base }; |
8776e519 HB |
4831 | |
4832 | kvm_x86_ops->set_gdt(vcpu, &dt); | |
4833 | } | |
4834 | ||
4835 | void realmode_lidt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base) | |
4836 | { | |
89a27f4d | 4837 | struct desc_ptr dt = { limit, base }; |
8776e519 HB |
4838 | |
4839 | kvm_x86_ops->set_idt(vcpu, &dt); | |
4840 | } | |
4841 | ||
07716717 DK |
4842 | static int move_to_next_stateful_cpuid_entry(struct kvm_vcpu *vcpu, int i) |
4843 | { | |
ad312c7c ZX |
4844 | struct kvm_cpuid_entry2 *e = &vcpu->arch.cpuid_entries[i]; |
4845 | int j, nent = vcpu->arch.cpuid_nent; | |
07716717 DK |
4846 | |
4847 | e->flags &= ~KVM_CPUID_FLAG_STATE_READ_NEXT; | |
4848 | /* when no next entry is found, the current entry[i] is reselected */ | |
0fdf8e59 | 4849 | for (j = i + 1; ; j = (j + 1) % nent) { |
ad312c7c | 4850 | struct kvm_cpuid_entry2 *ej = &vcpu->arch.cpuid_entries[j]; |
07716717 DK |
4851 | if (ej->function == e->function) { |
4852 | ej->flags |= KVM_CPUID_FLAG_STATE_READ_NEXT; | |
4853 | return j; | |
4854 | } | |
4855 | } | |
4856 | return 0; /* silence gcc, even though control never reaches here */ | |
4857 | } | |
4858 | ||
4859 | /* find an entry with matching function, matching index (if needed), and that | |
4860 | * should be read next (if it's stateful) */ | |
4861 | static int is_matching_cpuid_entry(struct kvm_cpuid_entry2 *e, | |
4862 | u32 function, u32 index) | |
4863 | { | |
4864 | if (e->function != function) | |
4865 | return 0; | |
4866 | if ((e->flags & KVM_CPUID_FLAG_SIGNIFCANT_INDEX) && e->index != index) | |
4867 | return 0; | |
4868 | if ((e->flags & KVM_CPUID_FLAG_STATEFUL_FUNC) && | |
19355475 | 4869 | !(e->flags & KVM_CPUID_FLAG_STATE_READ_NEXT)) |
07716717 DK |
4870 | return 0; |
4871 | return 1; | |
4872 | } | |
4873 | ||
d8017474 AG |
4874 | struct kvm_cpuid_entry2 *kvm_find_cpuid_entry(struct kvm_vcpu *vcpu, |
4875 | u32 function, u32 index) | |
8776e519 HB |
4876 | { |
4877 | int i; | |
d8017474 | 4878 | struct kvm_cpuid_entry2 *best = NULL; |
8776e519 | 4879 | |
ad312c7c | 4880 | for (i = 0; i < vcpu->arch.cpuid_nent; ++i) { |
d8017474 AG |
4881 | struct kvm_cpuid_entry2 *e; |
4882 | ||
ad312c7c | 4883 | e = &vcpu->arch.cpuid_entries[i]; |
07716717 DK |
4884 | if (is_matching_cpuid_entry(e, function, index)) { |
4885 | if (e->flags & KVM_CPUID_FLAG_STATEFUL_FUNC) | |
4886 | move_to_next_stateful_cpuid_entry(vcpu, i); | |
8776e519 HB |
4887 | best = e; |
4888 | break; | |
4889 | } | |
4890 | /* | |
4891 | * Both basic or both extended? | |
4892 | */ | |
4893 | if (((e->function ^ function) & 0x80000000) == 0) | |
4894 | if (!best || e->function > best->function) | |
4895 | best = e; | |
4896 | } | |
d8017474 AG |
4897 | return best; |
4898 | } | |
0e851880 | 4899 | EXPORT_SYMBOL_GPL(kvm_find_cpuid_entry); |
d8017474 | 4900 | |
82725b20 DE |
4901 | int cpuid_maxphyaddr(struct kvm_vcpu *vcpu) |
4902 | { | |
4903 | struct kvm_cpuid_entry2 *best; | |
4904 | ||
f7a71197 AK |
4905 | best = kvm_find_cpuid_entry(vcpu, 0x80000000, 0); |
4906 | if (!best || best->eax < 0x80000008) | |
4907 | goto not_found; | |
82725b20 DE |
4908 | best = kvm_find_cpuid_entry(vcpu, 0x80000008, 0); |
4909 | if (best) | |
4910 | return best->eax & 0xff; | |
f7a71197 | 4911 | not_found: |
82725b20 DE |
4912 | return 36; |
4913 | } | |
4914 | ||
d8017474 AG |
4915 | void kvm_emulate_cpuid(struct kvm_vcpu *vcpu) |
4916 | { | |
4917 | u32 function, index; | |
4918 | struct kvm_cpuid_entry2 *best; | |
4919 | ||
4920 | function = kvm_register_read(vcpu, VCPU_REGS_RAX); | |
4921 | index = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
4922 | kvm_register_write(vcpu, VCPU_REGS_RAX, 0); | |
4923 | kvm_register_write(vcpu, VCPU_REGS_RBX, 0); | |
4924 | kvm_register_write(vcpu, VCPU_REGS_RCX, 0); | |
4925 | kvm_register_write(vcpu, VCPU_REGS_RDX, 0); | |
4926 | best = kvm_find_cpuid_entry(vcpu, function, index); | |
8776e519 | 4927 | if (best) { |
5fdbf976 MT |
4928 | kvm_register_write(vcpu, VCPU_REGS_RAX, best->eax); |
4929 | kvm_register_write(vcpu, VCPU_REGS_RBX, best->ebx); | |
4930 | kvm_register_write(vcpu, VCPU_REGS_RCX, best->ecx); | |
4931 | kvm_register_write(vcpu, VCPU_REGS_RDX, best->edx); | |
8776e519 | 4932 | } |
8776e519 | 4933 | kvm_x86_ops->skip_emulated_instruction(vcpu); |
229456fc MT |
4934 | trace_kvm_cpuid(function, |
4935 | kvm_register_read(vcpu, VCPU_REGS_RAX), | |
4936 | kvm_register_read(vcpu, VCPU_REGS_RBX), | |
4937 | kvm_register_read(vcpu, VCPU_REGS_RCX), | |
4938 | kvm_register_read(vcpu, VCPU_REGS_RDX)); | |
8776e519 HB |
4939 | } |
4940 | EXPORT_SYMBOL_GPL(kvm_emulate_cpuid); | |
d0752060 | 4941 | |
b6c7a5dc HB |
4942 | /* |
4943 | * Check if userspace requested an interrupt window, and that the | |
4944 | * interrupt window is open. | |
4945 | * | |
4946 | * No need to exit to userspace if we already have an interrupt queued. | |
4947 | */ | |
851ba692 | 4948 | static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu) |
b6c7a5dc | 4949 | { |
8061823a | 4950 | return (!irqchip_in_kernel(vcpu->kvm) && !kvm_cpu_has_interrupt(vcpu) && |
851ba692 | 4951 | vcpu->run->request_interrupt_window && |
5df56646 | 4952 | kvm_arch_interrupt_allowed(vcpu)); |
b6c7a5dc HB |
4953 | } |
4954 | ||
851ba692 | 4955 | static void post_kvm_run_save(struct kvm_vcpu *vcpu) |
b6c7a5dc | 4956 | { |
851ba692 AK |
4957 | struct kvm_run *kvm_run = vcpu->run; |
4958 | ||
91586a3b | 4959 | kvm_run->if_flag = (kvm_get_rflags(vcpu) & X86_EFLAGS_IF) != 0; |
2d3ad1f4 | 4960 | kvm_run->cr8 = kvm_get_cr8(vcpu); |
b6c7a5dc | 4961 | kvm_run->apic_base = kvm_get_apic_base(vcpu); |
4531220b | 4962 | if (irqchip_in_kernel(vcpu->kvm)) |
b6c7a5dc | 4963 | kvm_run->ready_for_interrupt_injection = 1; |
4531220b | 4964 | else |
b6c7a5dc | 4965 | kvm_run->ready_for_interrupt_injection = |
fa9726b0 GN |
4966 | kvm_arch_interrupt_allowed(vcpu) && |
4967 | !kvm_cpu_has_interrupt(vcpu) && | |
4968 | !kvm_event_needs_reinjection(vcpu); | |
b6c7a5dc HB |
4969 | } |
4970 | ||
b93463aa AK |
4971 | static void vapic_enter(struct kvm_vcpu *vcpu) |
4972 | { | |
4973 | struct kvm_lapic *apic = vcpu->arch.apic; | |
4974 | struct page *page; | |
4975 | ||
4976 | if (!apic || !apic->vapic_addr) | |
4977 | return; | |
4978 | ||
4979 | page = gfn_to_page(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT); | |
72dc67a6 IE |
4980 | |
4981 | vcpu->arch.apic->vapic_page = page; | |
b93463aa AK |
4982 | } |
4983 | ||
4984 | static void vapic_exit(struct kvm_vcpu *vcpu) | |
4985 | { | |
4986 | struct kvm_lapic *apic = vcpu->arch.apic; | |
f656ce01 | 4987 | int idx; |
b93463aa AK |
4988 | |
4989 | if (!apic || !apic->vapic_addr) | |
4990 | return; | |
4991 | ||
f656ce01 | 4992 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
b93463aa AK |
4993 | kvm_release_page_dirty(apic->vapic_page); |
4994 | mark_page_dirty(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT); | |
f656ce01 | 4995 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
b93463aa AK |
4996 | } |
4997 | ||
95ba8273 GN |
4998 | static void update_cr8_intercept(struct kvm_vcpu *vcpu) |
4999 | { | |
5000 | int max_irr, tpr; | |
5001 | ||
5002 | if (!kvm_x86_ops->update_cr8_intercept) | |
5003 | return; | |
5004 | ||
88c808fd AK |
5005 | if (!vcpu->arch.apic) |
5006 | return; | |
5007 | ||
8db3baa2 GN |
5008 | if (!vcpu->arch.apic->vapic_addr) |
5009 | max_irr = kvm_lapic_find_highest_irr(vcpu); | |
5010 | else | |
5011 | max_irr = -1; | |
95ba8273 GN |
5012 | |
5013 | if (max_irr != -1) | |
5014 | max_irr >>= 4; | |
5015 | ||
5016 | tpr = kvm_lapic_get_cr8(vcpu); | |
5017 | ||
5018 | kvm_x86_ops->update_cr8_intercept(vcpu, tpr, max_irr); | |
5019 | } | |
5020 | ||
851ba692 | 5021 | static void inject_pending_event(struct kvm_vcpu *vcpu) |
95ba8273 GN |
5022 | { |
5023 | /* try to reinject previous events if any */ | |
b59bb7bd | 5024 | if (vcpu->arch.exception.pending) { |
5c1c85d0 AK |
5025 | trace_kvm_inj_exception(vcpu->arch.exception.nr, |
5026 | vcpu->arch.exception.has_error_code, | |
5027 | vcpu->arch.exception.error_code); | |
b59bb7bd GN |
5028 | kvm_x86_ops->queue_exception(vcpu, vcpu->arch.exception.nr, |
5029 | vcpu->arch.exception.has_error_code, | |
ce7ddec4 JR |
5030 | vcpu->arch.exception.error_code, |
5031 | vcpu->arch.exception.reinject); | |
b59bb7bd GN |
5032 | return; |
5033 | } | |
5034 | ||
95ba8273 GN |
5035 | if (vcpu->arch.nmi_injected) { |
5036 | kvm_x86_ops->set_nmi(vcpu); | |
5037 | return; | |
5038 | } | |
5039 | ||
5040 | if (vcpu->arch.interrupt.pending) { | |
66fd3f7f | 5041 | kvm_x86_ops->set_irq(vcpu); |
95ba8273 GN |
5042 | return; |
5043 | } | |
5044 | ||
5045 | /* try to inject new event if pending */ | |
5046 | if (vcpu->arch.nmi_pending) { | |
5047 | if (kvm_x86_ops->nmi_allowed(vcpu)) { | |
5048 | vcpu->arch.nmi_pending = false; | |
5049 | vcpu->arch.nmi_injected = true; | |
5050 | kvm_x86_ops->set_nmi(vcpu); | |
5051 | } | |
5052 | } else if (kvm_cpu_has_interrupt(vcpu)) { | |
5053 | if (kvm_x86_ops->interrupt_allowed(vcpu)) { | |
66fd3f7f GN |
5054 | kvm_queue_interrupt(vcpu, kvm_cpu_get_interrupt(vcpu), |
5055 | false); | |
5056 | kvm_x86_ops->set_irq(vcpu); | |
95ba8273 GN |
5057 | } |
5058 | } | |
5059 | } | |
5060 | ||
2acf923e DC |
5061 | static void kvm_load_guest_xcr0(struct kvm_vcpu *vcpu) |
5062 | { | |
5063 | if (kvm_read_cr4_bits(vcpu, X86_CR4_OSXSAVE) && | |
5064 | !vcpu->guest_xcr0_loaded) { | |
5065 | /* kvm_set_xcr() also depends on this */ | |
5066 | xsetbv(XCR_XFEATURE_ENABLED_MASK, vcpu->arch.xcr0); | |
5067 | vcpu->guest_xcr0_loaded = 1; | |
5068 | } | |
5069 | } | |
5070 | ||
5071 | static void kvm_put_guest_xcr0(struct kvm_vcpu *vcpu) | |
5072 | { | |
5073 | if (vcpu->guest_xcr0_loaded) { | |
5074 | if (vcpu->arch.xcr0 != host_xcr0) | |
5075 | xsetbv(XCR_XFEATURE_ENABLED_MASK, host_xcr0); | |
5076 | vcpu->guest_xcr0_loaded = 0; | |
5077 | } | |
5078 | } | |
5079 | ||
851ba692 | 5080 | static int vcpu_enter_guest(struct kvm_vcpu *vcpu) |
b6c7a5dc HB |
5081 | { |
5082 | int r; | |
6a8b1d13 | 5083 | bool req_int_win = !irqchip_in_kernel(vcpu->kvm) && |
851ba692 | 5084 | vcpu->run->request_interrupt_window; |
b6c7a5dc | 5085 | |
3e007509 | 5086 | if (vcpu->requests) { |
a8eeb04a | 5087 | if (kvm_check_request(KVM_REQ_MMU_RELOAD, vcpu)) |
2e53d63a | 5088 | kvm_mmu_unload(vcpu); |
a8eeb04a | 5089 | if (kvm_check_request(KVM_REQ_MIGRATE_TIMER, vcpu)) |
2f599714 | 5090 | __kvm_migrate_timers(vcpu); |
34c238a1 ZA |
5091 | if (kvm_check_request(KVM_REQ_CLOCK_UPDATE, vcpu)) { |
5092 | r = kvm_guest_time_update(vcpu); | |
8cfdc000 ZA |
5093 | if (unlikely(r)) |
5094 | goto out; | |
5095 | } | |
a8eeb04a | 5096 | if (kvm_check_request(KVM_REQ_MMU_SYNC, vcpu)) |
4731d4c7 | 5097 | kvm_mmu_sync_roots(vcpu); |
a8eeb04a | 5098 | if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu)) |
d4acf7e7 | 5099 | kvm_x86_ops->tlb_flush(vcpu); |
a8eeb04a | 5100 | if (kvm_check_request(KVM_REQ_REPORT_TPR_ACCESS, vcpu)) { |
851ba692 | 5101 | vcpu->run->exit_reason = KVM_EXIT_TPR_ACCESS; |
b93463aa AK |
5102 | r = 0; |
5103 | goto out; | |
5104 | } | |
a8eeb04a | 5105 | if (kvm_check_request(KVM_REQ_TRIPLE_FAULT, vcpu)) { |
851ba692 | 5106 | vcpu->run->exit_reason = KVM_EXIT_SHUTDOWN; |
71c4dfaf JR |
5107 | r = 0; |
5108 | goto out; | |
5109 | } | |
a8eeb04a | 5110 | if (kvm_check_request(KVM_REQ_DEACTIVATE_FPU, vcpu)) { |
02daab21 AK |
5111 | vcpu->fpu_active = 0; |
5112 | kvm_x86_ops->fpu_deactivate(vcpu); | |
5113 | } | |
2f52d58c | 5114 | } |
b93463aa | 5115 | |
3e007509 AK |
5116 | r = kvm_mmu_reload(vcpu); |
5117 | if (unlikely(r)) | |
5118 | goto out; | |
5119 | ||
b463a6f7 AK |
5120 | if (kvm_check_request(KVM_REQ_EVENT, vcpu) || req_int_win) { |
5121 | inject_pending_event(vcpu); | |
5122 | ||
5123 | /* enable NMI/IRQ window open exits if needed */ | |
5124 | if (vcpu->arch.nmi_pending) | |
5125 | kvm_x86_ops->enable_nmi_window(vcpu); | |
5126 | else if (kvm_cpu_has_interrupt(vcpu) || req_int_win) | |
5127 | kvm_x86_ops->enable_irq_window(vcpu); | |
5128 | ||
5129 | if (kvm_lapic_enabled(vcpu)) { | |
5130 | update_cr8_intercept(vcpu); | |
5131 | kvm_lapic_sync_to_vapic(vcpu); | |
5132 | } | |
5133 | } | |
5134 | ||
b6c7a5dc HB |
5135 | preempt_disable(); |
5136 | ||
5137 | kvm_x86_ops->prepare_guest_switch(vcpu); | |
2608d7a1 AK |
5138 | if (vcpu->fpu_active) |
5139 | kvm_load_guest_fpu(vcpu); | |
2acf923e | 5140 | kvm_load_guest_xcr0(vcpu); |
b6c7a5dc | 5141 | |
d94e1dc9 AK |
5142 | atomic_set(&vcpu->guest_mode, 1); |
5143 | smp_wmb(); | |
b6c7a5dc | 5144 | |
d94e1dc9 | 5145 | local_irq_disable(); |
32f88400 | 5146 | |
d94e1dc9 AK |
5147 | if (!atomic_read(&vcpu->guest_mode) || vcpu->requests |
5148 | || need_resched() || signal_pending(current)) { | |
5149 | atomic_set(&vcpu->guest_mode, 0); | |
5150 | smp_wmb(); | |
6c142801 AK |
5151 | local_irq_enable(); |
5152 | preempt_enable(); | |
b463a6f7 | 5153 | kvm_x86_ops->cancel_injection(vcpu); |
6c142801 AK |
5154 | r = 1; |
5155 | goto out; | |
5156 | } | |
5157 | ||
f656ce01 | 5158 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
3200f405 | 5159 | |
b6c7a5dc HB |
5160 | kvm_guest_enter(); |
5161 | ||
42dbaa5a | 5162 | if (unlikely(vcpu->arch.switch_db_regs)) { |
42dbaa5a JK |
5163 | set_debugreg(0, 7); |
5164 | set_debugreg(vcpu->arch.eff_db[0], 0); | |
5165 | set_debugreg(vcpu->arch.eff_db[1], 1); | |
5166 | set_debugreg(vcpu->arch.eff_db[2], 2); | |
5167 | set_debugreg(vcpu->arch.eff_db[3], 3); | |
5168 | } | |
b6c7a5dc | 5169 | |
229456fc | 5170 | trace_kvm_entry(vcpu->vcpu_id); |
851ba692 | 5171 | kvm_x86_ops->run(vcpu); |
b6c7a5dc | 5172 | |
24f1e32c FW |
5173 | /* |
5174 | * If the guest has used debug registers, at least dr7 | |
5175 | * will be disabled while returning to the host. | |
5176 | * If we don't have active breakpoints in the host, we don't | |
5177 | * care about the messed up debug address registers. But if | |
5178 | * we have some of them active, restore the old state. | |
5179 | */ | |
59d8eb53 | 5180 | if (hw_breakpoint_active()) |
24f1e32c | 5181 | hw_breakpoint_restore(); |
42dbaa5a | 5182 | |
1d5f066e ZA |
5183 | kvm_get_msr(vcpu, MSR_IA32_TSC, &vcpu->arch.last_guest_tsc); |
5184 | ||
d94e1dc9 AK |
5185 | atomic_set(&vcpu->guest_mode, 0); |
5186 | smp_wmb(); | |
b6c7a5dc HB |
5187 | local_irq_enable(); |
5188 | ||
5189 | ++vcpu->stat.exits; | |
5190 | ||
5191 | /* | |
5192 | * We must have an instruction between local_irq_enable() and | |
5193 | * kvm_guest_exit(), so the timer interrupt isn't delayed by | |
5194 | * the interrupt shadow. The stat.exits increment will do nicely. | |
5195 | * But we need to prevent reordering, hence this barrier(): | |
5196 | */ | |
5197 | barrier(); | |
5198 | ||
5199 | kvm_guest_exit(); | |
5200 | ||
5201 | preempt_enable(); | |
5202 | ||
f656ce01 | 5203 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
3200f405 | 5204 | |
b6c7a5dc HB |
5205 | /* |
5206 | * Profile KVM exit RIPs: | |
5207 | */ | |
5208 | if (unlikely(prof_on == KVM_PROFILING)) { | |
5fdbf976 MT |
5209 | unsigned long rip = kvm_rip_read(vcpu); |
5210 | profile_hit(KVM_PROFILING, (void *)rip); | |
b6c7a5dc HB |
5211 | } |
5212 | ||
298101da | 5213 | |
b93463aa AK |
5214 | kvm_lapic_sync_from_vapic(vcpu); |
5215 | ||
851ba692 | 5216 | r = kvm_x86_ops->handle_exit(vcpu); |
d7690175 MT |
5217 | out: |
5218 | return r; | |
5219 | } | |
b6c7a5dc | 5220 | |
09cec754 | 5221 | |
851ba692 | 5222 | static int __vcpu_run(struct kvm_vcpu *vcpu) |
d7690175 MT |
5223 | { |
5224 | int r; | |
f656ce01 | 5225 | struct kvm *kvm = vcpu->kvm; |
d7690175 MT |
5226 | |
5227 | if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_SIPI_RECEIVED)) { | |
1b10bf31 JK |
5228 | pr_debug("vcpu %d received sipi with vector # %x\n", |
5229 | vcpu->vcpu_id, vcpu->arch.sipi_vector); | |
d7690175 | 5230 | kvm_lapic_reset(vcpu); |
5f179287 | 5231 | r = kvm_arch_vcpu_reset(vcpu); |
d7690175 MT |
5232 | if (r) |
5233 | return r; | |
5234 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; | |
b6c7a5dc HB |
5235 | } |
5236 | ||
f656ce01 | 5237 | vcpu->srcu_idx = srcu_read_lock(&kvm->srcu); |
d7690175 MT |
5238 | vapic_enter(vcpu); |
5239 | ||
5240 | r = 1; | |
5241 | while (r > 0) { | |
af2152f5 | 5242 | if (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE) |
851ba692 | 5243 | r = vcpu_enter_guest(vcpu); |
d7690175 | 5244 | else { |
f656ce01 | 5245 | srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx); |
d7690175 | 5246 | kvm_vcpu_block(vcpu); |
f656ce01 | 5247 | vcpu->srcu_idx = srcu_read_lock(&kvm->srcu); |
a8eeb04a | 5248 | if (kvm_check_request(KVM_REQ_UNHALT, vcpu)) |
09cec754 GN |
5249 | { |
5250 | switch(vcpu->arch.mp_state) { | |
5251 | case KVM_MP_STATE_HALTED: | |
d7690175 | 5252 | vcpu->arch.mp_state = |
09cec754 GN |
5253 | KVM_MP_STATE_RUNNABLE; |
5254 | case KVM_MP_STATE_RUNNABLE: | |
5255 | break; | |
5256 | case KVM_MP_STATE_SIPI_RECEIVED: | |
5257 | default: | |
5258 | r = -EINTR; | |
5259 | break; | |
5260 | } | |
5261 | } | |
d7690175 MT |
5262 | } |
5263 | ||
09cec754 GN |
5264 | if (r <= 0) |
5265 | break; | |
5266 | ||
5267 | clear_bit(KVM_REQ_PENDING_TIMER, &vcpu->requests); | |
5268 | if (kvm_cpu_has_pending_timer(vcpu)) | |
5269 | kvm_inject_pending_timer_irqs(vcpu); | |
5270 | ||
851ba692 | 5271 | if (dm_request_for_irq_injection(vcpu)) { |
09cec754 | 5272 | r = -EINTR; |
851ba692 | 5273 | vcpu->run->exit_reason = KVM_EXIT_INTR; |
09cec754 GN |
5274 | ++vcpu->stat.request_irq_exits; |
5275 | } | |
5276 | if (signal_pending(current)) { | |
5277 | r = -EINTR; | |
851ba692 | 5278 | vcpu->run->exit_reason = KVM_EXIT_INTR; |
09cec754 GN |
5279 | ++vcpu->stat.signal_exits; |
5280 | } | |
5281 | if (need_resched()) { | |
f656ce01 | 5282 | srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx); |
09cec754 | 5283 | kvm_resched(vcpu); |
f656ce01 | 5284 | vcpu->srcu_idx = srcu_read_lock(&kvm->srcu); |
d7690175 | 5285 | } |
b6c7a5dc HB |
5286 | } |
5287 | ||
f656ce01 | 5288 | srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx); |
b6c7a5dc | 5289 | |
b93463aa AK |
5290 | vapic_exit(vcpu); |
5291 | ||
b6c7a5dc HB |
5292 | return r; |
5293 | } | |
5294 | ||
5295 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
5296 | { | |
5297 | int r; | |
5298 | sigset_t sigsaved; | |
5299 | ||
ac9f6dc0 AK |
5300 | if (vcpu->sigset_active) |
5301 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
5302 | ||
a4535290 | 5303 | if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)) { |
b6c7a5dc | 5304 | kvm_vcpu_block(vcpu); |
d7690175 | 5305 | clear_bit(KVM_REQ_UNHALT, &vcpu->requests); |
ac9f6dc0 AK |
5306 | r = -EAGAIN; |
5307 | goto out; | |
b6c7a5dc HB |
5308 | } |
5309 | ||
b6c7a5dc HB |
5310 | /* re-sync apic's tpr */ |
5311 | if (!irqchip_in_kernel(vcpu->kvm)) | |
2d3ad1f4 | 5312 | kvm_set_cr8(vcpu, kvm_run->cr8); |
b6c7a5dc | 5313 | |
d2ddd1c4 | 5314 | if (vcpu->arch.pio.count || vcpu->mmio_needed) { |
92bf9748 GN |
5315 | if (vcpu->mmio_needed) { |
5316 | memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8); | |
5317 | vcpu->mmio_read_completed = 1; | |
5318 | vcpu->mmio_needed = 0; | |
b6c7a5dc | 5319 | } |
f656ce01 | 5320 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
5cd21917 | 5321 | r = emulate_instruction(vcpu, 0, 0, EMULTYPE_NO_DECODE); |
f656ce01 | 5322 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
6d77dbfc | 5323 | if (r != EMULATE_DONE) { |
b6c7a5dc HB |
5324 | r = 0; |
5325 | goto out; | |
5326 | } | |
5327 | } | |
5fdbf976 MT |
5328 | if (kvm_run->exit_reason == KVM_EXIT_HYPERCALL) |
5329 | kvm_register_write(vcpu, VCPU_REGS_RAX, | |
5330 | kvm_run->hypercall.ret); | |
b6c7a5dc | 5331 | |
851ba692 | 5332 | r = __vcpu_run(vcpu); |
b6c7a5dc HB |
5333 | |
5334 | out: | |
f1d86e46 | 5335 | post_kvm_run_save(vcpu); |
b6c7a5dc HB |
5336 | if (vcpu->sigset_active) |
5337 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
5338 | ||
b6c7a5dc HB |
5339 | return r; |
5340 | } | |
5341 | ||
5342 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
5343 | { | |
5fdbf976 MT |
5344 | regs->rax = kvm_register_read(vcpu, VCPU_REGS_RAX); |
5345 | regs->rbx = kvm_register_read(vcpu, VCPU_REGS_RBX); | |
5346 | regs->rcx = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
5347 | regs->rdx = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
5348 | regs->rsi = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
5349 | regs->rdi = kvm_register_read(vcpu, VCPU_REGS_RDI); | |
5350 | regs->rsp = kvm_register_read(vcpu, VCPU_REGS_RSP); | |
5351 | regs->rbp = kvm_register_read(vcpu, VCPU_REGS_RBP); | |
b6c7a5dc | 5352 | #ifdef CONFIG_X86_64 |
5fdbf976 MT |
5353 | regs->r8 = kvm_register_read(vcpu, VCPU_REGS_R8); |
5354 | regs->r9 = kvm_register_read(vcpu, VCPU_REGS_R9); | |
5355 | regs->r10 = kvm_register_read(vcpu, VCPU_REGS_R10); | |
5356 | regs->r11 = kvm_register_read(vcpu, VCPU_REGS_R11); | |
5357 | regs->r12 = kvm_register_read(vcpu, VCPU_REGS_R12); | |
5358 | regs->r13 = kvm_register_read(vcpu, VCPU_REGS_R13); | |
5359 | regs->r14 = kvm_register_read(vcpu, VCPU_REGS_R14); | |
5360 | regs->r15 = kvm_register_read(vcpu, VCPU_REGS_R15); | |
b6c7a5dc HB |
5361 | #endif |
5362 | ||
5fdbf976 | 5363 | regs->rip = kvm_rip_read(vcpu); |
91586a3b | 5364 | regs->rflags = kvm_get_rflags(vcpu); |
b6c7a5dc | 5365 | |
b6c7a5dc HB |
5366 | return 0; |
5367 | } | |
5368 | ||
5369 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
5370 | { | |
5fdbf976 MT |
5371 | kvm_register_write(vcpu, VCPU_REGS_RAX, regs->rax); |
5372 | kvm_register_write(vcpu, VCPU_REGS_RBX, regs->rbx); | |
5373 | kvm_register_write(vcpu, VCPU_REGS_RCX, regs->rcx); | |
5374 | kvm_register_write(vcpu, VCPU_REGS_RDX, regs->rdx); | |
5375 | kvm_register_write(vcpu, VCPU_REGS_RSI, regs->rsi); | |
5376 | kvm_register_write(vcpu, VCPU_REGS_RDI, regs->rdi); | |
5377 | kvm_register_write(vcpu, VCPU_REGS_RSP, regs->rsp); | |
5378 | kvm_register_write(vcpu, VCPU_REGS_RBP, regs->rbp); | |
b6c7a5dc | 5379 | #ifdef CONFIG_X86_64 |
5fdbf976 MT |
5380 | kvm_register_write(vcpu, VCPU_REGS_R8, regs->r8); |
5381 | kvm_register_write(vcpu, VCPU_REGS_R9, regs->r9); | |
5382 | kvm_register_write(vcpu, VCPU_REGS_R10, regs->r10); | |
5383 | kvm_register_write(vcpu, VCPU_REGS_R11, regs->r11); | |
5384 | kvm_register_write(vcpu, VCPU_REGS_R12, regs->r12); | |
5385 | kvm_register_write(vcpu, VCPU_REGS_R13, regs->r13); | |
5386 | kvm_register_write(vcpu, VCPU_REGS_R14, regs->r14); | |
5387 | kvm_register_write(vcpu, VCPU_REGS_R15, regs->r15); | |
b6c7a5dc HB |
5388 | #endif |
5389 | ||
5fdbf976 | 5390 | kvm_rip_write(vcpu, regs->rip); |
91586a3b | 5391 | kvm_set_rflags(vcpu, regs->rflags); |
b6c7a5dc | 5392 | |
b4f14abd JK |
5393 | vcpu->arch.exception.pending = false; |
5394 | ||
3842d135 AK |
5395 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
5396 | ||
b6c7a5dc HB |
5397 | return 0; |
5398 | } | |
5399 | ||
b6c7a5dc HB |
5400 | void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l) |
5401 | { | |
5402 | struct kvm_segment cs; | |
5403 | ||
3e6e0aab | 5404 | kvm_get_segment(vcpu, &cs, VCPU_SREG_CS); |
b6c7a5dc HB |
5405 | *db = cs.db; |
5406 | *l = cs.l; | |
5407 | } | |
5408 | EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits); | |
5409 | ||
5410 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, | |
5411 | struct kvm_sregs *sregs) | |
5412 | { | |
89a27f4d | 5413 | struct desc_ptr dt; |
b6c7a5dc | 5414 | |
3e6e0aab GT |
5415 | kvm_get_segment(vcpu, &sregs->cs, VCPU_SREG_CS); |
5416 | kvm_get_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
5417 | kvm_get_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
5418 | kvm_get_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
5419 | kvm_get_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
5420 | kvm_get_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
b6c7a5dc | 5421 | |
3e6e0aab GT |
5422 | kvm_get_segment(vcpu, &sregs->tr, VCPU_SREG_TR); |
5423 | kvm_get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
b6c7a5dc HB |
5424 | |
5425 | kvm_x86_ops->get_idt(vcpu, &dt); | |
89a27f4d GN |
5426 | sregs->idt.limit = dt.size; |
5427 | sregs->idt.base = dt.address; | |
b6c7a5dc | 5428 | kvm_x86_ops->get_gdt(vcpu, &dt); |
89a27f4d GN |
5429 | sregs->gdt.limit = dt.size; |
5430 | sregs->gdt.base = dt.address; | |
b6c7a5dc | 5431 | |
4d4ec087 | 5432 | sregs->cr0 = kvm_read_cr0(vcpu); |
ad312c7c ZX |
5433 | sregs->cr2 = vcpu->arch.cr2; |
5434 | sregs->cr3 = vcpu->arch.cr3; | |
fc78f519 | 5435 | sregs->cr4 = kvm_read_cr4(vcpu); |
2d3ad1f4 | 5436 | sregs->cr8 = kvm_get_cr8(vcpu); |
f6801dff | 5437 | sregs->efer = vcpu->arch.efer; |
b6c7a5dc HB |
5438 | sregs->apic_base = kvm_get_apic_base(vcpu); |
5439 | ||
923c61bb | 5440 | memset(sregs->interrupt_bitmap, 0, sizeof sregs->interrupt_bitmap); |
b6c7a5dc | 5441 | |
36752c9b | 5442 | if (vcpu->arch.interrupt.pending && !vcpu->arch.interrupt.soft) |
14d0bc1f GN |
5443 | set_bit(vcpu->arch.interrupt.nr, |
5444 | (unsigned long *)sregs->interrupt_bitmap); | |
16d7a191 | 5445 | |
b6c7a5dc HB |
5446 | return 0; |
5447 | } | |
5448 | ||
62d9f0db MT |
5449 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
5450 | struct kvm_mp_state *mp_state) | |
5451 | { | |
62d9f0db | 5452 | mp_state->mp_state = vcpu->arch.mp_state; |
62d9f0db MT |
5453 | return 0; |
5454 | } | |
5455 | ||
5456 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
5457 | struct kvm_mp_state *mp_state) | |
5458 | { | |
62d9f0db | 5459 | vcpu->arch.mp_state = mp_state->mp_state; |
3842d135 | 5460 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
62d9f0db MT |
5461 | return 0; |
5462 | } | |
5463 | ||
e269fb21 JK |
5464 | int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int reason, |
5465 | bool has_error_code, u32 error_code) | |
b6c7a5dc | 5466 | { |
4d2179e1 | 5467 | struct decode_cache *c = &vcpu->arch.emulate_ctxt.decode; |
8ec4722d | 5468 | int ret; |
e01c2426 | 5469 | |
8ec4722d | 5470 | init_emulate_ctxt(vcpu); |
c697518a | 5471 | |
9aabc88f | 5472 | ret = emulator_task_switch(&vcpu->arch.emulate_ctxt, |
e269fb21 JK |
5473 | tss_selector, reason, has_error_code, |
5474 | error_code); | |
c697518a | 5475 | |
c697518a | 5476 | if (ret) |
19d04437 | 5477 | return EMULATE_FAIL; |
37817f29 | 5478 | |
4d2179e1 | 5479 | memcpy(vcpu->arch.regs, c->regs, sizeof c->regs); |
95c55886 | 5480 | kvm_rip_write(vcpu, vcpu->arch.emulate_ctxt.eip); |
19d04437 | 5481 | kvm_x86_ops->set_rflags(vcpu, vcpu->arch.emulate_ctxt.eflags); |
3842d135 | 5482 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
19d04437 | 5483 | return EMULATE_DONE; |
37817f29 IE |
5484 | } |
5485 | EXPORT_SYMBOL_GPL(kvm_task_switch); | |
5486 | ||
b6c7a5dc HB |
5487 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, |
5488 | struct kvm_sregs *sregs) | |
5489 | { | |
5490 | int mmu_reset_needed = 0; | |
923c61bb | 5491 | int pending_vec, max_bits; |
89a27f4d | 5492 | struct desc_ptr dt; |
b6c7a5dc | 5493 | |
89a27f4d GN |
5494 | dt.size = sregs->idt.limit; |
5495 | dt.address = sregs->idt.base; | |
b6c7a5dc | 5496 | kvm_x86_ops->set_idt(vcpu, &dt); |
89a27f4d GN |
5497 | dt.size = sregs->gdt.limit; |
5498 | dt.address = sregs->gdt.base; | |
b6c7a5dc HB |
5499 | kvm_x86_ops->set_gdt(vcpu, &dt); |
5500 | ||
ad312c7c ZX |
5501 | vcpu->arch.cr2 = sregs->cr2; |
5502 | mmu_reset_needed |= vcpu->arch.cr3 != sregs->cr3; | |
dc7e795e | 5503 | vcpu->arch.cr3 = sregs->cr3; |
b6c7a5dc | 5504 | |
2d3ad1f4 | 5505 | kvm_set_cr8(vcpu, sregs->cr8); |
b6c7a5dc | 5506 | |
f6801dff | 5507 | mmu_reset_needed |= vcpu->arch.efer != sregs->efer; |
b6c7a5dc | 5508 | kvm_x86_ops->set_efer(vcpu, sregs->efer); |
b6c7a5dc HB |
5509 | kvm_set_apic_base(vcpu, sregs->apic_base); |
5510 | ||
4d4ec087 | 5511 | mmu_reset_needed |= kvm_read_cr0(vcpu) != sregs->cr0; |
b6c7a5dc | 5512 | kvm_x86_ops->set_cr0(vcpu, sregs->cr0); |
d7306163 | 5513 | vcpu->arch.cr0 = sregs->cr0; |
b6c7a5dc | 5514 | |
fc78f519 | 5515 | mmu_reset_needed |= kvm_read_cr4(vcpu) != sregs->cr4; |
b6c7a5dc | 5516 | kvm_x86_ops->set_cr4(vcpu, sregs->cr4); |
7c93be44 | 5517 | if (!is_long_mode(vcpu) && is_pae(vcpu)) { |
ff03a073 | 5518 | load_pdptrs(vcpu, vcpu->arch.walk_mmu, vcpu->arch.cr3); |
7c93be44 MT |
5519 | mmu_reset_needed = 1; |
5520 | } | |
b6c7a5dc HB |
5521 | |
5522 | if (mmu_reset_needed) | |
5523 | kvm_mmu_reset_context(vcpu); | |
5524 | ||
923c61bb GN |
5525 | max_bits = (sizeof sregs->interrupt_bitmap) << 3; |
5526 | pending_vec = find_first_bit( | |
5527 | (const unsigned long *)sregs->interrupt_bitmap, max_bits); | |
5528 | if (pending_vec < max_bits) { | |
66fd3f7f | 5529 | kvm_queue_interrupt(vcpu, pending_vec, false); |
923c61bb GN |
5530 | pr_debug("Set back pending irq %d\n", pending_vec); |
5531 | if (irqchip_in_kernel(vcpu->kvm)) | |
5532 | kvm_pic_clear_isr_ack(vcpu->kvm); | |
b6c7a5dc HB |
5533 | } |
5534 | ||
3e6e0aab GT |
5535 | kvm_set_segment(vcpu, &sregs->cs, VCPU_SREG_CS); |
5536 | kvm_set_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
5537 | kvm_set_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
5538 | kvm_set_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
5539 | kvm_set_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
5540 | kvm_set_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
b6c7a5dc | 5541 | |
3e6e0aab GT |
5542 | kvm_set_segment(vcpu, &sregs->tr, VCPU_SREG_TR); |
5543 | kvm_set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
b6c7a5dc | 5544 | |
5f0269f5 ME |
5545 | update_cr8_intercept(vcpu); |
5546 | ||
9c3e4aab | 5547 | /* Older userspace won't unhalt the vcpu on reset. */ |
c5af89b6 | 5548 | if (kvm_vcpu_is_bsp(vcpu) && kvm_rip_read(vcpu) == 0xfff0 && |
9c3e4aab | 5549 | sregs->cs.selector == 0xf000 && sregs->cs.base == 0xffff0000 && |
3eeb3288 | 5550 | !is_protmode(vcpu)) |
9c3e4aab MT |
5551 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
5552 | ||
3842d135 AK |
5553 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
5554 | ||
b6c7a5dc HB |
5555 | return 0; |
5556 | } | |
5557 | ||
d0bfb940 JK |
5558 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
5559 | struct kvm_guest_debug *dbg) | |
b6c7a5dc | 5560 | { |
355be0b9 | 5561 | unsigned long rflags; |
ae675ef0 | 5562 | int i, r; |
b6c7a5dc | 5563 | |
4f926bf2 JK |
5564 | if (dbg->control & (KVM_GUESTDBG_INJECT_DB | KVM_GUESTDBG_INJECT_BP)) { |
5565 | r = -EBUSY; | |
5566 | if (vcpu->arch.exception.pending) | |
2122ff5e | 5567 | goto out; |
4f926bf2 JK |
5568 | if (dbg->control & KVM_GUESTDBG_INJECT_DB) |
5569 | kvm_queue_exception(vcpu, DB_VECTOR); | |
5570 | else | |
5571 | kvm_queue_exception(vcpu, BP_VECTOR); | |
5572 | } | |
5573 | ||
91586a3b JK |
5574 | /* |
5575 | * Read rflags as long as potentially injected trace flags are still | |
5576 | * filtered out. | |
5577 | */ | |
5578 | rflags = kvm_get_rflags(vcpu); | |
355be0b9 JK |
5579 | |
5580 | vcpu->guest_debug = dbg->control; | |
5581 | if (!(vcpu->guest_debug & KVM_GUESTDBG_ENABLE)) | |
5582 | vcpu->guest_debug = 0; | |
5583 | ||
5584 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) { | |
ae675ef0 JK |
5585 | for (i = 0; i < KVM_NR_DB_REGS; ++i) |
5586 | vcpu->arch.eff_db[i] = dbg->arch.debugreg[i]; | |
5587 | vcpu->arch.switch_db_regs = | |
5588 | (dbg->arch.debugreg[7] & DR7_BP_EN_MASK); | |
5589 | } else { | |
5590 | for (i = 0; i < KVM_NR_DB_REGS; i++) | |
5591 | vcpu->arch.eff_db[i] = vcpu->arch.db[i]; | |
5592 | vcpu->arch.switch_db_regs = (vcpu->arch.dr7 & DR7_BP_EN_MASK); | |
5593 | } | |
5594 | ||
f92653ee JK |
5595 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) |
5596 | vcpu->arch.singlestep_rip = kvm_rip_read(vcpu) + | |
5597 | get_segment_base(vcpu, VCPU_SREG_CS); | |
94fe45da | 5598 | |
91586a3b JK |
5599 | /* |
5600 | * Trigger an rflags update that will inject or remove the trace | |
5601 | * flags. | |
5602 | */ | |
5603 | kvm_set_rflags(vcpu, rflags); | |
b6c7a5dc | 5604 | |
355be0b9 | 5605 | kvm_x86_ops->set_guest_debug(vcpu, dbg); |
b6c7a5dc | 5606 | |
4f926bf2 | 5607 | r = 0; |
d0bfb940 | 5608 | |
2122ff5e | 5609 | out: |
b6c7a5dc HB |
5610 | |
5611 | return r; | |
5612 | } | |
5613 | ||
8b006791 ZX |
5614 | /* |
5615 | * Translate a guest virtual address to a guest physical address. | |
5616 | */ | |
5617 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, | |
5618 | struct kvm_translation *tr) | |
5619 | { | |
5620 | unsigned long vaddr = tr->linear_address; | |
5621 | gpa_t gpa; | |
f656ce01 | 5622 | int idx; |
8b006791 | 5623 | |
f656ce01 | 5624 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
1871c602 | 5625 | gpa = kvm_mmu_gva_to_gpa_system(vcpu, vaddr, NULL); |
f656ce01 | 5626 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
8b006791 ZX |
5627 | tr->physical_address = gpa; |
5628 | tr->valid = gpa != UNMAPPED_GVA; | |
5629 | tr->writeable = 1; | |
5630 | tr->usermode = 0; | |
8b006791 ZX |
5631 | |
5632 | return 0; | |
5633 | } | |
5634 | ||
d0752060 HB |
5635 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) |
5636 | { | |
98918833 SY |
5637 | struct i387_fxsave_struct *fxsave = |
5638 | &vcpu->arch.guest_fpu.state->fxsave; | |
d0752060 | 5639 | |
d0752060 HB |
5640 | memcpy(fpu->fpr, fxsave->st_space, 128); |
5641 | fpu->fcw = fxsave->cwd; | |
5642 | fpu->fsw = fxsave->swd; | |
5643 | fpu->ftwx = fxsave->twd; | |
5644 | fpu->last_opcode = fxsave->fop; | |
5645 | fpu->last_ip = fxsave->rip; | |
5646 | fpu->last_dp = fxsave->rdp; | |
5647 | memcpy(fpu->xmm, fxsave->xmm_space, sizeof fxsave->xmm_space); | |
5648 | ||
d0752060 HB |
5649 | return 0; |
5650 | } | |
5651 | ||
5652 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
5653 | { | |
98918833 SY |
5654 | struct i387_fxsave_struct *fxsave = |
5655 | &vcpu->arch.guest_fpu.state->fxsave; | |
d0752060 | 5656 | |
d0752060 HB |
5657 | memcpy(fxsave->st_space, fpu->fpr, 128); |
5658 | fxsave->cwd = fpu->fcw; | |
5659 | fxsave->swd = fpu->fsw; | |
5660 | fxsave->twd = fpu->ftwx; | |
5661 | fxsave->fop = fpu->last_opcode; | |
5662 | fxsave->rip = fpu->last_ip; | |
5663 | fxsave->rdp = fpu->last_dp; | |
5664 | memcpy(fxsave->xmm_space, fpu->xmm, sizeof fxsave->xmm_space); | |
5665 | ||
d0752060 HB |
5666 | return 0; |
5667 | } | |
5668 | ||
10ab25cd | 5669 | int fx_init(struct kvm_vcpu *vcpu) |
d0752060 | 5670 | { |
10ab25cd JK |
5671 | int err; |
5672 | ||
5673 | err = fpu_alloc(&vcpu->arch.guest_fpu); | |
5674 | if (err) | |
5675 | return err; | |
5676 | ||
98918833 | 5677 | fpu_finit(&vcpu->arch.guest_fpu); |
d0752060 | 5678 | |
2acf923e DC |
5679 | /* |
5680 | * Ensure guest xcr0 is valid for loading | |
5681 | */ | |
5682 | vcpu->arch.xcr0 = XSTATE_FP; | |
5683 | ||
ad312c7c | 5684 | vcpu->arch.cr0 |= X86_CR0_ET; |
10ab25cd JK |
5685 | |
5686 | return 0; | |
d0752060 HB |
5687 | } |
5688 | EXPORT_SYMBOL_GPL(fx_init); | |
5689 | ||
98918833 SY |
5690 | static void fx_free(struct kvm_vcpu *vcpu) |
5691 | { | |
5692 | fpu_free(&vcpu->arch.guest_fpu); | |
5693 | } | |
5694 | ||
d0752060 HB |
5695 | void kvm_load_guest_fpu(struct kvm_vcpu *vcpu) |
5696 | { | |
2608d7a1 | 5697 | if (vcpu->guest_fpu_loaded) |
d0752060 HB |
5698 | return; |
5699 | ||
2acf923e DC |
5700 | /* |
5701 | * Restore all possible states in the guest, | |
5702 | * and assume host would use all available bits. | |
5703 | * Guest xcr0 would be loaded later. | |
5704 | */ | |
5705 | kvm_put_guest_xcr0(vcpu); | |
d0752060 | 5706 | vcpu->guest_fpu_loaded = 1; |
7cf30855 | 5707 | unlazy_fpu(current); |
98918833 | 5708 | fpu_restore_checking(&vcpu->arch.guest_fpu); |
0c04851c | 5709 | trace_kvm_fpu(1); |
d0752060 | 5710 | } |
d0752060 HB |
5711 | |
5712 | void kvm_put_guest_fpu(struct kvm_vcpu *vcpu) | |
5713 | { | |
2acf923e DC |
5714 | kvm_put_guest_xcr0(vcpu); |
5715 | ||
d0752060 HB |
5716 | if (!vcpu->guest_fpu_loaded) |
5717 | return; | |
5718 | ||
5719 | vcpu->guest_fpu_loaded = 0; | |
98918833 | 5720 | fpu_save_init(&vcpu->arch.guest_fpu); |
f096ed85 | 5721 | ++vcpu->stat.fpu_reload; |
a8eeb04a | 5722 | kvm_make_request(KVM_REQ_DEACTIVATE_FPU, vcpu); |
0c04851c | 5723 | trace_kvm_fpu(0); |
d0752060 | 5724 | } |
e9b11c17 ZX |
5725 | |
5726 | void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu) | |
5727 | { | |
7f1ea208 JR |
5728 | if (vcpu->arch.time_page) { |
5729 | kvm_release_page_dirty(vcpu->arch.time_page); | |
5730 | vcpu->arch.time_page = NULL; | |
5731 | } | |
5732 | ||
f5f48ee1 | 5733 | free_cpumask_var(vcpu->arch.wbinvd_dirty_mask); |
98918833 | 5734 | fx_free(vcpu); |
e9b11c17 ZX |
5735 | kvm_x86_ops->vcpu_free(vcpu); |
5736 | } | |
5737 | ||
5738 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, | |
5739 | unsigned int id) | |
5740 | { | |
6755bae8 ZA |
5741 | if (check_tsc_unstable() && atomic_read(&kvm->online_vcpus) != 0) |
5742 | printk_once(KERN_WARNING | |
5743 | "kvm: SMP vm created on host with unstable TSC; " | |
5744 | "guest TSC will not be reliable\n"); | |
26e5215f AK |
5745 | return kvm_x86_ops->vcpu_create(kvm, id); |
5746 | } | |
e9b11c17 | 5747 | |
26e5215f AK |
5748 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) |
5749 | { | |
5750 | int r; | |
e9b11c17 | 5751 | |
0bed3b56 | 5752 | vcpu->arch.mtrr_state.have_fixed = 1; |
e9b11c17 ZX |
5753 | vcpu_load(vcpu); |
5754 | r = kvm_arch_vcpu_reset(vcpu); | |
5755 | if (r == 0) | |
5756 | r = kvm_mmu_setup(vcpu); | |
5757 | vcpu_put(vcpu); | |
5758 | if (r < 0) | |
5759 | goto free_vcpu; | |
5760 | ||
26e5215f | 5761 | return 0; |
e9b11c17 ZX |
5762 | free_vcpu: |
5763 | kvm_x86_ops->vcpu_free(vcpu); | |
26e5215f | 5764 | return r; |
e9b11c17 ZX |
5765 | } |
5766 | ||
d40ccc62 | 5767 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
e9b11c17 ZX |
5768 | { |
5769 | vcpu_load(vcpu); | |
5770 | kvm_mmu_unload(vcpu); | |
5771 | vcpu_put(vcpu); | |
5772 | ||
98918833 | 5773 | fx_free(vcpu); |
e9b11c17 ZX |
5774 | kvm_x86_ops->vcpu_free(vcpu); |
5775 | } | |
5776 | ||
5777 | int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu) | |
5778 | { | |
448fa4a9 JK |
5779 | vcpu->arch.nmi_pending = false; |
5780 | vcpu->arch.nmi_injected = false; | |
5781 | ||
42dbaa5a JK |
5782 | vcpu->arch.switch_db_regs = 0; |
5783 | memset(vcpu->arch.db, 0, sizeof(vcpu->arch.db)); | |
5784 | vcpu->arch.dr6 = DR6_FIXED_1; | |
5785 | vcpu->arch.dr7 = DR7_FIXED_1; | |
5786 | ||
3842d135 AK |
5787 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
5788 | ||
e9b11c17 ZX |
5789 | return kvm_x86_ops->vcpu_reset(vcpu); |
5790 | } | |
5791 | ||
10474ae8 | 5792 | int kvm_arch_hardware_enable(void *garbage) |
e9b11c17 | 5793 | { |
ca84d1a2 ZA |
5794 | struct kvm *kvm; |
5795 | struct kvm_vcpu *vcpu; | |
5796 | int i; | |
18863bdd AK |
5797 | |
5798 | kvm_shared_msr_cpu_online(); | |
ca84d1a2 ZA |
5799 | list_for_each_entry(kvm, &vm_list, vm_list) |
5800 | kvm_for_each_vcpu(i, vcpu, kvm) | |
5801 | if (vcpu->cpu == smp_processor_id()) | |
c285545f | 5802 | kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); |
10474ae8 | 5803 | return kvm_x86_ops->hardware_enable(garbage); |
e9b11c17 ZX |
5804 | } |
5805 | ||
5806 | void kvm_arch_hardware_disable(void *garbage) | |
5807 | { | |
5808 | kvm_x86_ops->hardware_disable(garbage); | |
3548bab5 | 5809 | drop_user_return_notifiers(garbage); |
e9b11c17 ZX |
5810 | } |
5811 | ||
5812 | int kvm_arch_hardware_setup(void) | |
5813 | { | |
5814 | return kvm_x86_ops->hardware_setup(); | |
5815 | } | |
5816 | ||
5817 | void kvm_arch_hardware_unsetup(void) | |
5818 | { | |
5819 | kvm_x86_ops->hardware_unsetup(); | |
5820 | } | |
5821 | ||
5822 | void kvm_arch_check_processor_compat(void *rtn) | |
5823 | { | |
5824 | kvm_x86_ops->check_processor_compatibility(rtn); | |
5825 | } | |
5826 | ||
5827 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) | |
5828 | { | |
5829 | struct page *page; | |
5830 | struct kvm *kvm; | |
5831 | int r; | |
5832 | ||
5833 | BUG_ON(vcpu->kvm == NULL); | |
5834 | kvm = vcpu->kvm; | |
5835 | ||
9aabc88f | 5836 | vcpu->arch.emulate_ctxt.ops = &emulate_ops; |
14dfe855 | 5837 | vcpu->arch.walk_mmu = &vcpu->arch.mmu; |
ad312c7c | 5838 | vcpu->arch.mmu.root_hpa = INVALID_PAGE; |
c30a358d | 5839 | vcpu->arch.mmu.translate_gpa = translate_gpa; |
02f59dc9 | 5840 | vcpu->arch.nested_mmu.translate_gpa = translate_nested_gpa; |
c5af89b6 | 5841 | if (!irqchip_in_kernel(kvm) || kvm_vcpu_is_bsp(vcpu)) |
a4535290 | 5842 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
e9b11c17 | 5843 | else |
a4535290 | 5844 | vcpu->arch.mp_state = KVM_MP_STATE_UNINITIALIZED; |
e9b11c17 ZX |
5845 | |
5846 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
5847 | if (!page) { | |
5848 | r = -ENOMEM; | |
5849 | goto fail; | |
5850 | } | |
ad312c7c | 5851 | vcpu->arch.pio_data = page_address(page); |
e9b11c17 | 5852 | |
c285545f ZA |
5853 | if (!kvm->arch.virtual_tsc_khz) |
5854 | kvm_arch_set_tsc_khz(kvm, max_tsc_khz); | |
5855 | ||
e9b11c17 ZX |
5856 | r = kvm_mmu_create(vcpu); |
5857 | if (r < 0) | |
5858 | goto fail_free_pio_data; | |
5859 | ||
5860 | if (irqchip_in_kernel(kvm)) { | |
5861 | r = kvm_create_lapic(vcpu); | |
5862 | if (r < 0) | |
5863 | goto fail_mmu_destroy; | |
5864 | } | |
5865 | ||
890ca9ae HY |
5866 | vcpu->arch.mce_banks = kzalloc(KVM_MAX_MCE_BANKS * sizeof(u64) * 4, |
5867 | GFP_KERNEL); | |
5868 | if (!vcpu->arch.mce_banks) { | |
5869 | r = -ENOMEM; | |
443c39bc | 5870 | goto fail_free_lapic; |
890ca9ae HY |
5871 | } |
5872 | vcpu->arch.mcg_cap = KVM_MAX_MCE_BANKS; | |
5873 | ||
f5f48ee1 SY |
5874 | if (!zalloc_cpumask_var(&vcpu->arch.wbinvd_dirty_mask, GFP_KERNEL)) |
5875 | goto fail_free_mce_banks; | |
5876 | ||
e9b11c17 | 5877 | return 0; |
f5f48ee1 SY |
5878 | fail_free_mce_banks: |
5879 | kfree(vcpu->arch.mce_banks); | |
443c39bc WY |
5880 | fail_free_lapic: |
5881 | kvm_free_lapic(vcpu); | |
e9b11c17 ZX |
5882 | fail_mmu_destroy: |
5883 | kvm_mmu_destroy(vcpu); | |
5884 | fail_free_pio_data: | |
ad312c7c | 5885 | free_page((unsigned long)vcpu->arch.pio_data); |
e9b11c17 ZX |
5886 | fail: |
5887 | return r; | |
5888 | } | |
5889 | ||
5890 | void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) | |
5891 | { | |
f656ce01 MT |
5892 | int idx; |
5893 | ||
36cb93fd | 5894 | kfree(vcpu->arch.mce_banks); |
e9b11c17 | 5895 | kvm_free_lapic(vcpu); |
f656ce01 | 5896 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
e9b11c17 | 5897 | kvm_mmu_destroy(vcpu); |
f656ce01 | 5898 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
ad312c7c | 5899 | free_page((unsigned long)vcpu->arch.pio_data); |
e9b11c17 | 5900 | } |
d19a9cd2 ZX |
5901 | |
5902 | struct kvm *kvm_arch_create_vm(void) | |
5903 | { | |
5904 | struct kvm *kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL); | |
5905 | ||
5906 | if (!kvm) | |
5907 | return ERR_PTR(-ENOMEM); | |
5908 | ||
f05e70ac | 5909 | INIT_LIST_HEAD(&kvm->arch.active_mmu_pages); |
4d5c5d0f | 5910 | INIT_LIST_HEAD(&kvm->arch.assigned_dev_head); |
d19a9cd2 | 5911 | |
5550af4d SY |
5912 | /* Reserve bit 0 of irq_sources_bitmap for userspace irq source */ |
5913 | set_bit(KVM_USERSPACE_IRQ_SOURCE_ID, &kvm->arch.irq_sources_bitmap); | |
5914 | ||
99e3e30a | 5915 | spin_lock_init(&kvm->arch.tsc_write_lock); |
53f658b3 | 5916 | |
d19a9cd2 ZX |
5917 | return kvm; |
5918 | } | |
5919 | ||
5920 | static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu) | |
5921 | { | |
5922 | vcpu_load(vcpu); | |
5923 | kvm_mmu_unload(vcpu); | |
5924 | vcpu_put(vcpu); | |
5925 | } | |
5926 | ||
5927 | static void kvm_free_vcpus(struct kvm *kvm) | |
5928 | { | |
5929 | unsigned int i; | |
988a2cae | 5930 | struct kvm_vcpu *vcpu; |
d19a9cd2 ZX |
5931 | |
5932 | /* | |
5933 | * Unpin any mmu pages first. | |
5934 | */ | |
988a2cae GN |
5935 | kvm_for_each_vcpu(i, vcpu, kvm) |
5936 | kvm_unload_vcpu_mmu(vcpu); | |
5937 | kvm_for_each_vcpu(i, vcpu, kvm) | |
5938 | kvm_arch_vcpu_free(vcpu); | |
5939 | ||
5940 | mutex_lock(&kvm->lock); | |
5941 | for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) | |
5942 | kvm->vcpus[i] = NULL; | |
d19a9cd2 | 5943 | |
988a2cae GN |
5944 | atomic_set(&kvm->online_vcpus, 0); |
5945 | mutex_unlock(&kvm->lock); | |
d19a9cd2 ZX |
5946 | } |
5947 | ||
ad8ba2cd SY |
5948 | void kvm_arch_sync_events(struct kvm *kvm) |
5949 | { | |
ba4cef31 | 5950 | kvm_free_all_assigned_devices(kvm); |
aea924f6 | 5951 | kvm_free_pit(kvm); |
ad8ba2cd SY |
5952 | } |
5953 | ||
d19a9cd2 ZX |
5954 | void kvm_arch_destroy_vm(struct kvm *kvm) |
5955 | { | |
6eb55818 | 5956 | kvm_iommu_unmap_guest(kvm); |
d7deeeb0 ZX |
5957 | kfree(kvm->arch.vpic); |
5958 | kfree(kvm->arch.vioapic); | |
d19a9cd2 ZX |
5959 | kvm_free_vcpus(kvm); |
5960 | kvm_free_physmem(kvm); | |
3d45830c AK |
5961 | if (kvm->arch.apic_access_page) |
5962 | put_page(kvm->arch.apic_access_page); | |
b7ebfb05 SY |
5963 | if (kvm->arch.ept_identity_pagetable) |
5964 | put_page(kvm->arch.ept_identity_pagetable); | |
64749204 | 5965 | cleanup_srcu_struct(&kvm->srcu); |
d19a9cd2 ZX |
5966 | kfree(kvm); |
5967 | } | |
0de10343 | 5968 | |
f7784b8e MT |
5969 | int kvm_arch_prepare_memory_region(struct kvm *kvm, |
5970 | struct kvm_memory_slot *memslot, | |
0de10343 | 5971 | struct kvm_memory_slot old, |
f7784b8e | 5972 | struct kvm_userspace_memory_region *mem, |
0de10343 ZX |
5973 | int user_alloc) |
5974 | { | |
f7784b8e | 5975 | int npages = memslot->npages; |
7ac77099 AK |
5976 | int map_flags = MAP_PRIVATE | MAP_ANONYMOUS; |
5977 | ||
5978 | /* Prevent internal slot pages from being moved by fork()/COW. */ | |
5979 | if (memslot->id >= KVM_MEMORY_SLOTS) | |
5980 | map_flags = MAP_SHARED | MAP_ANONYMOUS; | |
0de10343 ZX |
5981 | |
5982 | /*To keep backward compatibility with older userspace, | |
5983 | *x86 needs to hanlde !user_alloc case. | |
5984 | */ | |
5985 | if (!user_alloc) { | |
5986 | if (npages && !old.rmap) { | |
604b38ac AA |
5987 | unsigned long userspace_addr; |
5988 | ||
72dc67a6 | 5989 | down_write(¤t->mm->mmap_sem); |
604b38ac AA |
5990 | userspace_addr = do_mmap(NULL, 0, |
5991 | npages * PAGE_SIZE, | |
5992 | PROT_READ | PROT_WRITE, | |
7ac77099 | 5993 | map_flags, |
604b38ac | 5994 | 0); |
72dc67a6 | 5995 | up_write(¤t->mm->mmap_sem); |
0de10343 | 5996 | |
604b38ac AA |
5997 | if (IS_ERR((void *)userspace_addr)) |
5998 | return PTR_ERR((void *)userspace_addr); | |
5999 | ||
604b38ac | 6000 | memslot->userspace_addr = userspace_addr; |
0de10343 ZX |
6001 | } |
6002 | } | |
6003 | ||
f7784b8e MT |
6004 | |
6005 | return 0; | |
6006 | } | |
6007 | ||
6008 | void kvm_arch_commit_memory_region(struct kvm *kvm, | |
6009 | struct kvm_userspace_memory_region *mem, | |
6010 | struct kvm_memory_slot old, | |
6011 | int user_alloc) | |
6012 | { | |
6013 | ||
6014 | int npages = mem->memory_size >> PAGE_SHIFT; | |
6015 | ||
6016 | if (!user_alloc && !old.user_alloc && old.rmap && !npages) { | |
6017 | int ret; | |
6018 | ||
6019 | down_write(¤t->mm->mmap_sem); | |
6020 | ret = do_munmap(current->mm, old.userspace_addr, | |
6021 | old.npages * PAGE_SIZE); | |
6022 | up_write(¤t->mm->mmap_sem); | |
6023 | if (ret < 0) | |
6024 | printk(KERN_WARNING | |
6025 | "kvm_vm_ioctl_set_memory_region: " | |
6026 | "failed to munmap memory\n"); | |
6027 | } | |
6028 | ||
7c8a83b7 | 6029 | spin_lock(&kvm->mmu_lock); |
f05e70ac | 6030 | if (!kvm->arch.n_requested_mmu_pages) { |
0de10343 ZX |
6031 | unsigned int nr_mmu_pages = kvm_mmu_calculate_mmu_pages(kvm); |
6032 | kvm_mmu_change_mmu_pages(kvm, nr_mmu_pages); | |
6033 | } | |
6034 | ||
6035 | kvm_mmu_slot_remove_write_access(kvm, mem->slot); | |
7c8a83b7 | 6036 | spin_unlock(&kvm->mmu_lock); |
0de10343 | 6037 | } |
1d737c8a | 6038 | |
34d4cb8f MT |
6039 | void kvm_arch_flush_shadow(struct kvm *kvm) |
6040 | { | |
6041 | kvm_mmu_zap_all(kvm); | |
8986ecc0 | 6042 | kvm_reload_remote_mmus(kvm); |
34d4cb8f MT |
6043 | } |
6044 | ||
1d737c8a ZX |
6045 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
6046 | { | |
a4535290 | 6047 | return vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE |
a1b37100 GN |
6048 | || vcpu->arch.mp_state == KVM_MP_STATE_SIPI_RECEIVED |
6049 | || vcpu->arch.nmi_pending || | |
6050 | (kvm_arch_interrupt_allowed(vcpu) && | |
6051 | kvm_cpu_has_interrupt(vcpu)); | |
1d737c8a | 6052 | } |
5736199a | 6053 | |
5736199a ZX |
6054 | void kvm_vcpu_kick(struct kvm_vcpu *vcpu) |
6055 | { | |
32f88400 MT |
6056 | int me; |
6057 | int cpu = vcpu->cpu; | |
5736199a ZX |
6058 | |
6059 | if (waitqueue_active(&vcpu->wq)) { | |
6060 | wake_up_interruptible(&vcpu->wq); | |
6061 | ++vcpu->stat.halt_wakeup; | |
6062 | } | |
32f88400 MT |
6063 | |
6064 | me = get_cpu(); | |
6065 | if (cpu != me && (unsigned)cpu < nr_cpu_ids && cpu_online(cpu)) | |
d94e1dc9 | 6066 | if (atomic_xchg(&vcpu->guest_mode, 0)) |
32f88400 | 6067 | smp_send_reschedule(cpu); |
e9571ed5 | 6068 | put_cpu(); |
5736199a | 6069 | } |
78646121 GN |
6070 | |
6071 | int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu) | |
6072 | { | |
6073 | return kvm_x86_ops->interrupt_allowed(vcpu); | |
6074 | } | |
229456fc | 6075 | |
f92653ee JK |
6076 | bool kvm_is_linear_rip(struct kvm_vcpu *vcpu, unsigned long linear_rip) |
6077 | { | |
6078 | unsigned long current_rip = kvm_rip_read(vcpu) + | |
6079 | get_segment_base(vcpu, VCPU_SREG_CS); | |
6080 | ||
6081 | return current_rip == linear_rip; | |
6082 | } | |
6083 | EXPORT_SYMBOL_GPL(kvm_is_linear_rip); | |
6084 | ||
94fe45da JK |
6085 | unsigned long kvm_get_rflags(struct kvm_vcpu *vcpu) |
6086 | { | |
6087 | unsigned long rflags; | |
6088 | ||
6089 | rflags = kvm_x86_ops->get_rflags(vcpu); | |
6090 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) | |
c310bac5 | 6091 | rflags &= ~X86_EFLAGS_TF; |
94fe45da JK |
6092 | return rflags; |
6093 | } | |
6094 | EXPORT_SYMBOL_GPL(kvm_get_rflags); | |
6095 | ||
6096 | void kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags) | |
6097 | { | |
6098 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP && | |
f92653ee | 6099 | kvm_is_linear_rip(vcpu, vcpu->arch.singlestep_rip)) |
c310bac5 | 6100 | rflags |= X86_EFLAGS_TF; |
94fe45da | 6101 | kvm_x86_ops->set_rflags(vcpu, rflags); |
3842d135 | 6102 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
94fe45da JK |
6103 | } |
6104 | EXPORT_SYMBOL_GPL(kvm_set_rflags); | |
6105 | ||
229456fc MT |
6106 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_exit); |
6107 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_inj_virq); | |
6108 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_page_fault); | |
6109 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_msr); | |
6110 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_cr); | |
0ac406de | 6111 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmrun); |
d8cabddf | 6112 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit); |
17897f36 | 6113 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit_inject); |
236649de | 6114 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intr_vmexit); |
ec1ff790 | 6115 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_invlpga); |
532a46b9 | 6116 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_skinit); |
2e554e8d | 6117 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intercepts); |