Commit | Line | Data |
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043405e1 CO |
1 | /* |
2 | * Kernel-based Virtual Machine driver for Linux | |
3 | * | |
4 | * derived from drivers/kvm/kvm_main.c | |
5 | * | |
6 | * Copyright (C) 2006 Qumranet, Inc. | |
4d5c5d0f BAY |
7 | * Copyright (C) 2008 Qumranet, Inc. |
8 | * Copyright IBM Corporation, 2008 | |
221d059d | 9 | * Copyright 2010 Red Hat, Inc. and/or its affilates. |
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> |
043405e1 | 58 | |
313a3dc7 | 59 | #define MAX_IO_MSRS 256 |
a03490ed CO |
60 | #define CR0_RESERVED_BITS \ |
61 | (~(unsigned long)(X86_CR0_PE | X86_CR0_MP | X86_CR0_EM | X86_CR0_TS \ | |
62 | | X86_CR0_ET | X86_CR0_NE | X86_CR0_WP | X86_CR0_AM \ | |
63 | | X86_CR0_NW | X86_CR0_CD | X86_CR0_PG)) | |
64 | #define CR4_RESERVED_BITS \ | |
65 | (~(unsigned long)(X86_CR4_VME | X86_CR4_PVI | X86_CR4_TSD | X86_CR4_DE\ | |
66 | | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_MCE \ | |
67 | | X86_CR4_PGE | X86_CR4_PCE | X86_CR4_OSFXSR \ | |
2acf923e | 68 | | X86_CR4_OSXSAVE \ |
a03490ed CO |
69 | | X86_CR4_OSXMMEXCPT | X86_CR4_VMXE)) |
70 | ||
71 | #define CR8_RESERVED_BITS (~(unsigned long)X86_CR8_TPR) | |
890ca9ae HY |
72 | |
73 | #define KVM_MAX_MCE_BANKS 32 | |
74 | #define KVM_MCE_CAP_SUPPORTED MCG_CTL_P | |
75 | ||
50a37eb4 JR |
76 | /* EFER defaults: |
77 | * - enable syscall per default because its emulated by KVM | |
78 | * - enable LME and LMA per default on 64 bit KVM | |
79 | */ | |
80 | #ifdef CONFIG_X86_64 | |
81 | static u64 __read_mostly efer_reserved_bits = 0xfffffffffffffafeULL; | |
82 | #else | |
83 | static u64 __read_mostly efer_reserved_bits = 0xfffffffffffffffeULL; | |
84 | #endif | |
313a3dc7 | 85 | |
ba1389b7 AK |
86 | #define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM |
87 | #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU | |
417bc304 | 88 | |
cb142eb7 | 89 | static void update_cr8_intercept(struct kvm_vcpu *vcpu); |
674eea0f AK |
90 | static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2 *cpuid, |
91 | struct kvm_cpuid_entry2 __user *entries); | |
92 | ||
97896d04 | 93 | struct kvm_x86_ops *kvm_x86_ops; |
5fdbf976 | 94 | EXPORT_SYMBOL_GPL(kvm_x86_ops); |
97896d04 | 95 | |
ed85c068 AP |
96 | int ignore_msrs = 0; |
97 | module_param_named(ignore_msrs, ignore_msrs, bool, S_IRUGO | S_IWUSR); | |
98 | ||
18863bdd AK |
99 | #define KVM_NR_SHARED_MSRS 16 |
100 | ||
101 | struct kvm_shared_msrs_global { | |
102 | int nr; | |
2bf78fa7 | 103 | u32 msrs[KVM_NR_SHARED_MSRS]; |
18863bdd AK |
104 | }; |
105 | ||
106 | struct kvm_shared_msrs { | |
107 | struct user_return_notifier urn; | |
108 | bool registered; | |
2bf78fa7 SY |
109 | struct kvm_shared_msr_values { |
110 | u64 host; | |
111 | u64 curr; | |
112 | } values[KVM_NR_SHARED_MSRS]; | |
18863bdd AK |
113 | }; |
114 | ||
115 | static struct kvm_shared_msrs_global __read_mostly shared_msrs_global; | |
116 | static DEFINE_PER_CPU(struct kvm_shared_msrs, shared_msrs); | |
117 | ||
417bc304 | 118 | struct kvm_stats_debugfs_item debugfs_entries[] = { |
ba1389b7 AK |
119 | { "pf_fixed", VCPU_STAT(pf_fixed) }, |
120 | { "pf_guest", VCPU_STAT(pf_guest) }, | |
121 | { "tlb_flush", VCPU_STAT(tlb_flush) }, | |
122 | { "invlpg", VCPU_STAT(invlpg) }, | |
123 | { "exits", VCPU_STAT(exits) }, | |
124 | { "io_exits", VCPU_STAT(io_exits) }, | |
125 | { "mmio_exits", VCPU_STAT(mmio_exits) }, | |
126 | { "signal_exits", VCPU_STAT(signal_exits) }, | |
127 | { "irq_window", VCPU_STAT(irq_window_exits) }, | |
f08864b4 | 128 | { "nmi_window", VCPU_STAT(nmi_window_exits) }, |
ba1389b7 AK |
129 | { "halt_exits", VCPU_STAT(halt_exits) }, |
130 | { "halt_wakeup", VCPU_STAT(halt_wakeup) }, | |
f11c3a8d | 131 | { "hypercalls", VCPU_STAT(hypercalls) }, |
ba1389b7 AK |
132 | { "request_irq", VCPU_STAT(request_irq_exits) }, |
133 | { "irq_exits", VCPU_STAT(irq_exits) }, | |
134 | { "host_state_reload", VCPU_STAT(host_state_reload) }, | |
135 | { "efer_reload", VCPU_STAT(efer_reload) }, | |
136 | { "fpu_reload", VCPU_STAT(fpu_reload) }, | |
137 | { "insn_emulation", VCPU_STAT(insn_emulation) }, | |
138 | { "insn_emulation_fail", VCPU_STAT(insn_emulation_fail) }, | |
fa89a817 | 139 | { "irq_injections", VCPU_STAT(irq_injections) }, |
c4abb7c9 | 140 | { "nmi_injections", VCPU_STAT(nmi_injections) }, |
4cee5764 AK |
141 | { "mmu_shadow_zapped", VM_STAT(mmu_shadow_zapped) }, |
142 | { "mmu_pte_write", VM_STAT(mmu_pte_write) }, | |
143 | { "mmu_pte_updated", VM_STAT(mmu_pte_updated) }, | |
144 | { "mmu_pde_zapped", VM_STAT(mmu_pde_zapped) }, | |
145 | { "mmu_flooded", VM_STAT(mmu_flooded) }, | |
146 | { "mmu_recycled", VM_STAT(mmu_recycled) }, | |
dfc5aa00 | 147 | { "mmu_cache_miss", VM_STAT(mmu_cache_miss) }, |
4731d4c7 | 148 | { "mmu_unsync", VM_STAT(mmu_unsync) }, |
0f74a24c | 149 | { "remote_tlb_flush", VM_STAT(remote_tlb_flush) }, |
05da4558 | 150 | { "largepages", VM_STAT(lpages) }, |
417bc304 HB |
151 | { NULL } |
152 | }; | |
153 | ||
2acf923e DC |
154 | u64 __read_mostly host_xcr0; |
155 | ||
156 | static inline u32 bit(int bitno) | |
157 | { | |
158 | return 1 << (bitno & 31); | |
159 | } | |
160 | ||
18863bdd AK |
161 | static void kvm_on_user_return(struct user_return_notifier *urn) |
162 | { | |
163 | unsigned slot; | |
18863bdd AK |
164 | struct kvm_shared_msrs *locals |
165 | = container_of(urn, struct kvm_shared_msrs, urn); | |
2bf78fa7 | 166 | struct kvm_shared_msr_values *values; |
18863bdd AK |
167 | |
168 | for (slot = 0; slot < shared_msrs_global.nr; ++slot) { | |
2bf78fa7 SY |
169 | values = &locals->values[slot]; |
170 | if (values->host != values->curr) { | |
171 | wrmsrl(shared_msrs_global.msrs[slot], values->host); | |
172 | values->curr = values->host; | |
18863bdd AK |
173 | } |
174 | } | |
175 | locals->registered = false; | |
176 | user_return_notifier_unregister(urn); | |
177 | } | |
178 | ||
2bf78fa7 | 179 | static void shared_msr_update(unsigned slot, u32 msr) |
18863bdd | 180 | { |
2bf78fa7 | 181 | struct kvm_shared_msrs *smsr; |
18863bdd AK |
182 | u64 value; |
183 | ||
2bf78fa7 SY |
184 | smsr = &__get_cpu_var(shared_msrs); |
185 | /* only read, and nobody should modify it at this time, | |
186 | * so don't need lock */ | |
187 | if (slot >= shared_msrs_global.nr) { | |
188 | printk(KERN_ERR "kvm: invalid MSR slot!"); | |
189 | return; | |
190 | } | |
191 | rdmsrl_safe(msr, &value); | |
192 | smsr->values[slot].host = value; | |
193 | smsr->values[slot].curr = value; | |
194 | } | |
195 | ||
196 | void kvm_define_shared_msr(unsigned slot, u32 msr) | |
197 | { | |
18863bdd AK |
198 | if (slot >= shared_msrs_global.nr) |
199 | shared_msrs_global.nr = slot + 1; | |
2bf78fa7 SY |
200 | shared_msrs_global.msrs[slot] = msr; |
201 | /* we need ensured the shared_msr_global have been updated */ | |
202 | smp_wmb(); | |
18863bdd AK |
203 | } |
204 | EXPORT_SYMBOL_GPL(kvm_define_shared_msr); | |
205 | ||
206 | static void kvm_shared_msr_cpu_online(void) | |
207 | { | |
208 | unsigned i; | |
18863bdd AK |
209 | |
210 | for (i = 0; i < shared_msrs_global.nr; ++i) | |
2bf78fa7 | 211 | shared_msr_update(i, shared_msrs_global.msrs[i]); |
18863bdd AK |
212 | } |
213 | ||
d5696725 | 214 | void kvm_set_shared_msr(unsigned slot, u64 value, u64 mask) |
18863bdd AK |
215 | { |
216 | struct kvm_shared_msrs *smsr = &__get_cpu_var(shared_msrs); | |
217 | ||
2bf78fa7 | 218 | if (((value ^ smsr->values[slot].curr) & mask) == 0) |
18863bdd | 219 | return; |
2bf78fa7 SY |
220 | smsr->values[slot].curr = value; |
221 | wrmsrl(shared_msrs_global.msrs[slot], value); | |
18863bdd AK |
222 | if (!smsr->registered) { |
223 | smsr->urn.on_user_return = kvm_on_user_return; | |
224 | user_return_notifier_register(&smsr->urn); | |
225 | smsr->registered = true; | |
226 | } | |
227 | } | |
228 | EXPORT_SYMBOL_GPL(kvm_set_shared_msr); | |
229 | ||
3548bab5 AK |
230 | static void drop_user_return_notifiers(void *ignore) |
231 | { | |
232 | struct kvm_shared_msrs *smsr = &__get_cpu_var(shared_msrs); | |
233 | ||
234 | if (smsr->registered) | |
235 | kvm_on_user_return(&smsr->urn); | |
236 | } | |
237 | ||
6866b83e CO |
238 | u64 kvm_get_apic_base(struct kvm_vcpu *vcpu) |
239 | { | |
240 | if (irqchip_in_kernel(vcpu->kvm)) | |
ad312c7c | 241 | return vcpu->arch.apic_base; |
6866b83e | 242 | else |
ad312c7c | 243 | return vcpu->arch.apic_base; |
6866b83e CO |
244 | } |
245 | EXPORT_SYMBOL_GPL(kvm_get_apic_base); | |
246 | ||
247 | void kvm_set_apic_base(struct kvm_vcpu *vcpu, u64 data) | |
248 | { | |
249 | /* TODO: reserve bits check */ | |
250 | if (irqchip_in_kernel(vcpu->kvm)) | |
251 | kvm_lapic_set_base(vcpu, data); | |
252 | else | |
ad312c7c | 253 | vcpu->arch.apic_base = data; |
6866b83e CO |
254 | } |
255 | EXPORT_SYMBOL_GPL(kvm_set_apic_base); | |
256 | ||
3fd28fce ED |
257 | #define EXCPT_BENIGN 0 |
258 | #define EXCPT_CONTRIBUTORY 1 | |
259 | #define EXCPT_PF 2 | |
260 | ||
261 | static int exception_class(int vector) | |
262 | { | |
263 | switch (vector) { | |
264 | case PF_VECTOR: | |
265 | return EXCPT_PF; | |
266 | case DE_VECTOR: | |
267 | case TS_VECTOR: | |
268 | case NP_VECTOR: | |
269 | case SS_VECTOR: | |
270 | case GP_VECTOR: | |
271 | return EXCPT_CONTRIBUTORY; | |
272 | default: | |
273 | break; | |
274 | } | |
275 | return EXCPT_BENIGN; | |
276 | } | |
277 | ||
278 | static void kvm_multiple_exception(struct kvm_vcpu *vcpu, | |
ce7ddec4 JR |
279 | unsigned nr, bool has_error, u32 error_code, |
280 | bool reinject) | |
3fd28fce ED |
281 | { |
282 | u32 prev_nr; | |
283 | int class1, class2; | |
284 | ||
285 | if (!vcpu->arch.exception.pending) { | |
286 | queue: | |
287 | vcpu->arch.exception.pending = true; | |
288 | vcpu->arch.exception.has_error_code = has_error; | |
289 | vcpu->arch.exception.nr = nr; | |
290 | vcpu->arch.exception.error_code = error_code; | |
3f0fd292 | 291 | vcpu->arch.exception.reinject = reinject; |
3fd28fce ED |
292 | return; |
293 | } | |
294 | ||
295 | /* to check exception */ | |
296 | prev_nr = vcpu->arch.exception.nr; | |
297 | if (prev_nr == DF_VECTOR) { | |
298 | /* triple fault -> shutdown */ | |
a8eeb04a | 299 | kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu); |
3fd28fce ED |
300 | return; |
301 | } | |
302 | class1 = exception_class(prev_nr); | |
303 | class2 = exception_class(nr); | |
304 | if ((class1 == EXCPT_CONTRIBUTORY && class2 == EXCPT_CONTRIBUTORY) | |
305 | || (class1 == EXCPT_PF && class2 != EXCPT_BENIGN)) { | |
306 | /* generate double fault per SDM Table 5-5 */ | |
307 | vcpu->arch.exception.pending = true; | |
308 | vcpu->arch.exception.has_error_code = true; | |
309 | vcpu->arch.exception.nr = DF_VECTOR; | |
310 | vcpu->arch.exception.error_code = 0; | |
311 | } else | |
312 | /* replace previous exception with a new one in a hope | |
313 | that instruction re-execution will regenerate lost | |
314 | exception */ | |
315 | goto queue; | |
316 | } | |
317 | ||
298101da AK |
318 | void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr) |
319 | { | |
ce7ddec4 | 320 | kvm_multiple_exception(vcpu, nr, false, 0, false); |
298101da AK |
321 | } |
322 | EXPORT_SYMBOL_GPL(kvm_queue_exception); | |
323 | ||
ce7ddec4 JR |
324 | void kvm_requeue_exception(struct kvm_vcpu *vcpu, unsigned nr) |
325 | { | |
326 | kvm_multiple_exception(vcpu, nr, false, 0, true); | |
327 | } | |
328 | EXPORT_SYMBOL_GPL(kvm_requeue_exception); | |
329 | ||
c3c91fee AK |
330 | void kvm_inject_page_fault(struct kvm_vcpu *vcpu, unsigned long addr, |
331 | u32 error_code) | |
332 | { | |
333 | ++vcpu->stat.pf_guest; | |
ad312c7c | 334 | vcpu->arch.cr2 = addr; |
c3c91fee AK |
335 | kvm_queue_exception_e(vcpu, PF_VECTOR, error_code); |
336 | } | |
337 | ||
3419ffc8 SY |
338 | void kvm_inject_nmi(struct kvm_vcpu *vcpu) |
339 | { | |
340 | vcpu->arch.nmi_pending = 1; | |
341 | } | |
342 | EXPORT_SYMBOL_GPL(kvm_inject_nmi); | |
343 | ||
298101da AK |
344 | void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code) |
345 | { | |
ce7ddec4 | 346 | kvm_multiple_exception(vcpu, nr, true, error_code, false); |
298101da AK |
347 | } |
348 | EXPORT_SYMBOL_GPL(kvm_queue_exception_e); | |
349 | ||
ce7ddec4 JR |
350 | void kvm_requeue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code) |
351 | { | |
352 | kvm_multiple_exception(vcpu, nr, true, error_code, true); | |
353 | } | |
354 | EXPORT_SYMBOL_GPL(kvm_requeue_exception_e); | |
355 | ||
0a79b009 AK |
356 | /* |
357 | * Checks if cpl <= required_cpl; if true, return true. Otherwise queue | |
358 | * a #GP and return false. | |
359 | */ | |
360 | bool kvm_require_cpl(struct kvm_vcpu *vcpu, int required_cpl) | |
298101da | 361 | { |
0a79b009 AK |
362 | if (kvm_x86_ops->get_cpl(vcpu) <= required_cpl) |
363 | return true; | |
364 | kvm_queue_exception_e(vcpu, GP_VECTOR, 0); | |
365 | return false; | |
298101da | 366 | } |
0a79b009 | 367 | EXPORT_SYMBOL_GPL(kvm_require_cpl); |
298101da | 368 | |
a03490ed CO |
369 | /* |
370 | * Load the pae pdptrs. Return true is they are all valid. | |
371 | */ | |
372 | int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3) | |
373 | { | |
374 | gfn_t pdpt_gfn = cr3 >> PAGE_SHIFT; | |
375 | unsigned offset = ((cr3 & (PAGE_SIZE-1)) >> 5) << 2; | |
376 | int i; | |
377 | int ret; | |
ad312c7c | 378 | u64 pdpte[ARRAY_SIZE(vcpu->arch.pdptrs)]; |
a03490ed | 379 | |
a03490ed CO |
380 | ret = kvm_read_guest_page(vcpu->kvm, pdpt_gfn, pdpte, |
381 | offset * sizeof(u64), sizeof(pdpte)); | |
382 | if (ret < 0) { | |
383 | ret = 0; | |
384 | goto out; | |
385 | } | |
386 | for (i = 0; i < ARRAY_SIZE(pdpte); ++i) { | |
43a3795a | 387 | if (is_present_gpte(pdpte[i]) && |
20c466b5 | 388 | (pdpte[i] & vcpu->arch.mmu.rsvd_bits_mask[0][2])) { |
a03490ed CO |
389 | ret = 0; |
390 | goto out; | |
391 | } | |
392 | } | |
393 | ret = 1; | |
394 | ||
ad312c7c | 395 | memcpy(vcpu->arch.pdptrs, pdpte, sizeof(vcpu->arch.pdptrs)); |
6de4f3ad AK |
396 | __set_bit(VCPU_EXREG_PDPTR, |
397 | (unsigned long *)&vcpu->arch.regs_avail); | |
398 | __set_bit(VCPU_EXREG_PDPTR, | |
399 | (unsigned long *)&vcpu->arch.regs_dirty); | |
a03490ed | 400 | out: |
a03490ed CO |
401 | |
402 | return ret; | |
403 | } | |
cc4b6871 | 404 | EXPORT_SYMBOL_GPL(load_pdptrs); |
a03490ed | 405 | |
d835dfec AK |
406 | static bool pdptrs_changed(struct kvm_vcpu *vcpu) |
407 | { | |
ad312c7c | 408 | u64 pdpte[ARRAY_SIZE(vcpu->arch.pdptrs)]; |
d835dfec AK |
409 | bool changed = true; |
410 | int r; | |
411 | ||
412 | if (is_long_mode(vcpu) || !is_pae(vcpu)) | |
413 | return false; | |
414 | ||
6de4f3ad AK |
415 | if (!test_bit(VCPU_EXREG_PDPTR, |
416 | (unsigned long *)&vcpu->arch.regs_avail)) | |
417 | return true; | |
418 | ||
ad312c7c | 419 | r = kvm_read_guest(vcpu->kvm, vcpu->arch.cr3 & ~31u, pdpte, sizeof(pdpte)); |
d835dfec AK |
420 | if (r < 0) |
421 | goto out; | |
ad312c7c | 422 | changed = memcmp(pdpte, vcpu->arch.pdptrs, sizeof(pdpte)) != 0; |
d835dfec | 423 | out: |
d835dfec AK |
424 | |
425 | return changed; | |
426 | } | |
427 | ||
49a9b07e | 428 | int kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) |
a03490ed | 429 | { |
aad82703 SY |
430 | unsigned long old_cr0 = kvm_read_cr0(vcpu); |
431 | unsigned long update_bits = X86_CR0_PG | X86_CR0_WP | | |
432 | X86_CR0_CD | X86_CR0_NW; | |
433 | ||
f9a48e6a AK |
434 | cr0 |= X86_CR0_ET; |
435 | ||
ab344828 | 436 | #ifdef CONFIG_X86_64 |
0f12244f GN |
437 | if (cr0 & 0xffffffff00000000UL) |
438 | return 1; | |
ab344828 GN |
439 | #endif |
440 | ||
441 | cr0 &= ~CR0_RESERVED_BITS; | |
a03490ed | 442 | |
0f12244f GN |
443 | if ((cr0 & X86_CR0_NW) && !(cr0 & X86_CR0_CD)) |
444 | return 1; | |
a03490ed | 445 | |
0f12244f GN |
446 | if ((cr0 & X86_CR0_PG) && !(cr0 & X86_CR0_PE)) |
447 | return 1; | |
a03490ed CO |
448 | |
449 | if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) { | |
450 | #ifdef CONFIG_X86_64 | |
f6801dff | 451 | if ((vcpu->arch.efer & EFER_LME)) { |
a03490ed CO |
452 | int cs_db, cs_l; |
453 | ||
0f12244f GN |
454 | if (!is_pae(vcpu)) |
455 | return 1; | |
a03490ed | 456 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); |
0f12244f GN |
457 | if (cs_l) |
458 | return 1; | |
a03490ed CO |
459 | } else |
460 | #endif | |
0f12244f GN |
461 | if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->arch.cr3)) |
462 | return 1; | |
a03490ed CO |
463 | } |
464 | ||
465 | kvm_x86_ops->set_cr0(vcpu, cr0); | |
a03490ed | 466 | |
aad82703 SY |
467 | if ((cr0 ^ old_cr0) & update_bits) |
468 | kvm_mmu_reset_context(vcpu); | |
0f12244f GN |
469 | return 0; |
470 | } | |
2d3ad1f4 | 471 | EXPORT_SYMBOL_GPL(kvm_set_cr0); |
a03490ed | 472 | |
2d3ad1f4 | 473 | void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw) |
a03490ed | 474 | { |
49a9b07e | 475 | (void)kvm_set_cr0(vcpu, kvm_read_cr0_bits(vcpu, ~0x0eul) | (msw & 0x0f)); |
a03490ed | 476 | } |
2d3ad1f4 | 477 | EXPORT_SYMBOL_GPL(kvm_lmsw); |
a03490ed | 478 | |
2acf923e DC |
479 | int __kvm_set_xcr(struct kvm_vcpu *vcpu, u32 index, u64 xcr) |
480 | { | |
481 | u64 xcr0; | |
482 | ||
483 | /* Only support XCR_XFEATURE_ENABLED_MASK(xcr0) now */ | |
484 | if (index != XCR_XFEATURE_ENABLED_MASK) | |
485 | return 1; | |
486 | xcr0 = xcr; | |
487 | if (kvm_x86_ops->get_cpl(vcpu) != 0) | |
488 | return 1; | |
489 | if (!(xcr0 & XSTATE_FP)) | |
490 | return 1; | |
491 | if ((xcr0 & XSTATE_YMM) && !(xcr0 & XSTATE_SSE)) | |
492 | return 1; | |
493 | if (xcr0 & ~host_xcr0) | |
494 | return 1; | |
495 | vcpu->arch.xcr0 = xcr0; | |
496 | vcpu->guest_xcr0_loaded = 0; | |
497 | return 0; | |
498 | } | |
499 | ||
500 | int kvm_set_xcr(struct kvm_vcpu *vcpu, u32 index, u64 xcr) | |
501 | { | |
502 | if (__kvm_set_xcr(vcpu, index, xcr)) { | |
503 | kvm_inject_gp(vcpu, 0); | |
504 | return 1; | |
505 | } | |
506 | return 0; | |
507 | } | |
508 | EXPORT_SYMBOL_GPL(kvm_set_xcr); | |
509 | ||
510 | static bool guest_cpuid_has_xsave(struct kvm_vcpu *vcpu) | |
511 | { | |
512 | struct kvm_cpuid_entry2 *best; | |
513 | ||
514 | best = kvm_find_cpuid_entry(vcpu, 1, 0); | |
515 | return best && (best->ecx & bit(X86_FEATURE_XSAVE)); | |
516 | } | |
517 | ||
518 | static void update_cpuid(struct kvm_vcpu *vcpu) | |
519 | { | |
520 | struct kvm_cpuid_entry2 *best; | |
521 | ||
522 | best = kvm_find_cpuid_entry(vcpu, 1, 0); | |
523 | if (!best) | |
524 | return; | |
525 | ||
526 | /* Update OSXSAVE bit */ | |
527 | if (cpu_has_xsave && best->function == 0x1) { | |
528 | best->ecx &= ~(bit(X86_FEATURE_OSXSAVE)); | |
529 | if (kvm_read_cr4_bits(vcpu, X86_CR4_OSXSAVE)) | |
530 | best->ecx |= bit(X86_FEATURE_OSXSAVE); | |
531 | } | |
532 | } | |
533 | ||
a83b29c6 | 534 | int kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4) |
a03490ed | 535 | { |
fc78f519 | 536 | unsigned long old_cr4 = kvm_read_cr4(vcpu); |
a2edf57f AK |
537 | unsigned long pdptr_bits = X86_CR4_PGE | X86_CR4_PSE | X86_CR4_PAE; |
538 | ||
0f12244f GN |
539 | if (cr4 & CR4_RESERVED_BITS) |
540 | return 1; | |
a03490ed | 541 | |
2acf923e DC |
542 | if (!guest_cpuid_has_xsave(vcpu) && (cr4 & X86_CR4_OSXSAVE)) |
543 | return 1; | |
544 | ||
a03490ed | 545 | if (is_long_mode(vcpu)) { |
0f12244f GN |
546 | if (!(cr4 & X86_CR4_PAE)) |
547 | return 1; | |
a2edf57f AK |
548 | } else if (is_paging(vcpu) && (cr4 & X86_CR4_PAE) |
549 | && ((cr4 ^ old_cr4) & pdptr_bits) | |
0f12244f GN |
550 | && !load_pdptrs(vcpu, vcpu->arch.cr3)) |
551 | return 1; | |
552 | ||
553 | if (cr4 & X86_CR4_VMXE) | |
554 | return 1; | |
a03490ed | 555 | |
a03490ed | 556 | kvm_x86_ops->set_cr4(vcpu, cr4); |
62ad0755 | 557 | |
aad82703 SY |
558 | if ((cr4 ^ old_cr4) & pdptr_bits) |
559 | kvm_mmu_reset_context(vcpu); | |
0f12244f | 560 | |
2acf923e DC |
561 | if ((cr4 ^ old_cr4) & X86_CR4_OSXSAVE) |
562 | update_cpuid(vcpu); | |
563 | ||
0f12244f GN |
564 | return 0; |
565 | } | |
2d3ad1f4 | 566 | EXPORT_SYMBOL_GPL(kvm_set_cr4); |
a03490ed | 567 | |
2390218b | 568 | int kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3) |
a03490ed | 569 | { |
ad312c7c | 570 | if (cr3 == vcpu->arch.cr3 && !pdptrs_changed(vcpu)) { |
0ba73cda | 571 | kvm_mmu_sync_roots(vcpu); |
d835dfec | 572 | kvm_mmu_flush_tlb(vcpu); |
0f12244f | 573 | return 0; |
d835dfec AK |
574 | } |
575 | ||
a03490ed | 576 | if (is_long_mode(vcpu)) { |
0f12244f GN |
577 | if (cr3 & CR3_L_MODE_RESERVED_BITS) |
578 | return 1; | |
a03490ed CO |
579 | } else { |
580 | if (is_pae(vcpu)) { | |
0f12244f GN |
581 | if (cr3 & CR3_PAE_RESERVED_BITS) |
582 | return 1; | |
583 | if (is_paging(vcpu) && !load_pdptrs(vcpu, cr3)) | |
584 | return 1; | |
a03490ed CO |
585 | } |
586 | /* | |
587 | * We don't check reserved bits in nonpae mode, because | |
588 | * this isn't enforced, and VMware depends on this. | |
589 | */ | |
590 | } | |
591 | ||
a03490ed CO |
592 | /* |
593 | * Does the new cr3 value map to physical memory? (Note, we | |
594 | * catch an invalid cr3 even in real-mode, because it would | |
595 | * cause trouble later on when we turn on paging anyway.) | |
596 | * | |
597 | * A real CPU would silently accept an invalid cr3 and would | |
598 | * attempt to use it - with largely undefined (and often hard | |
599 | * to debug) behavior on the guest side. | |
600 | */ | |
601 | if (unlikely(!gfn_to_memslot(vcpu->kvm, cr3 >> PAGE_SHIFT))) | |
0f12244f GN |
602 | return 1; |
603 | vcpu->arch.cr3 = cr3; | |
604 | vcpu->arch.mmu.new_cr3(vcpu); | |
605 | return 0; | |
606 | } | |
2d3ad1f4 | 607 | EXPORT_SYMBOL_GPL(kvm_set_cr3); |
a03490ed | 608 | |
0f12244f | 609 | int __kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8) |
a03490ed | 610 | { |
0f12244f GN |
611 | if (cr8 & CR8_RESERVED_BITS) |
612 | return 1; | |
a03490ed CO |
613 | if (irqchip_in_kernel(vcpu->kvm)) |
614 | kvm_lapic_set_tpr(vcpu, cr8); | |
615 | else | |
ad312c7c | 616 | vcpu->arch.cr8 = cr8; |
0f12244f GN |
617 | return 0; |
618 | } | |
619 | ||
620 | void kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8) | |
621 | { | |
622 | if (__kvm_set_cr8(vcpu, cr8)) | |
623 | kvm_inject_gp(vcpu, 0); | |
a03490ed | 624 | } |
2d3ad1f4 | 625 | EXPORT_SYMBOL_GPL(kvm_set_cr8); |
a03490ed | 626 | |
2d3ad1f4 | 627 | unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu) |
a03490ed CO |
628 | { |
629 | if (irqchip_in_kernel(vcpu->kvm)) | |
630 | return kvm_lapic_get_cr8(vcpu); | |
631 | else | |
ad312c7c | 632 | return vcpu->arch.cr8; |
a03490ed | 633 | } |
2d3ad1f4 | 634 | EXPORT_SYMBOL_GPL(kvm_get_cr8); |
a03490ed | 635 | |
338dbc97 | 636 | static int __kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val) |
020df079 GN |
637 | { |
638 | switch (dr) { | |
639 | case 0 ... 3: | |
640 | vcpu->arch.db[dr] = val; | |
641 | if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)) | |
642 | vcpu->arch.eff_db[dr] = val; | |
643 | break; | |
644 | case 4: | |
338dbc97 GN |
645 | if (kvm_read_cr4_bits(vcpu, X86_CR4_DE)) |
646 | return 1; /* #UD */ | |
020df079 GN |
647 | /* fall through */ |
648 | case 6: | |
338dbc97 GN |
649 | if (val & 0xffffffff00000000ULL) |
650 | return -1; /* #GP */ | |
020df079 GN |
651 | vcpu->arch.dr6 = (val & DR6_VOLATILE) | DR6_FIXED_1; |
652 | break; | |
653 | case 5: | |
338dbc97 GN |
654 | if (kvm_read_cr4_bits(vcpu, X86_CR4_DE)) |
655 | return 1; /* #UD */ | |
020df079 GN |
656 | /* fall through */ |
657 | default: /* 7 */ | |
338dbc97 GN |
658 | if (val & 0xffffffff00000000ULL) |
659 | return -1; /* #GP */ | |
020df079 GN |
660 | vcpu->arch.dr7 = (val & DR7_VOLATILE) | DR7_FIXED_1; |
661 | if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)) { | |
662 | kvm_x86_ops->set_dr7(vcpu, vcpu->arch.dr7); | |
663 | vcpu->arch.switch_db_regs = (val & DR7_BP_EN_MASK); | |
664 | } | |
665 | break; | |
666 | } | |
667 | ||
668 | return 0; | |
669 | } | |
338dbc97 GN |
670 | |
671 | int kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val) | |
672 | { | |
673 | int res; | |
674 | ||
675 | res = __kvm_set_dr(vcpu, dr, val); | |
676 | if (res > 0) | |
677 | kvm_queue_exception(vcpu, UD_VECTOR); | |
678 | else if (res < 0) | |
679 | kvm_inject_gp(vcpu, 0); | |
680 | ||
681 | return res; | |
682 | } | |
020df079 GN |
683 | EXPORT_SYMBOL_GPL(kvm_set_dr); |
684 | ||
338dbc97 | 685 | static int _kvm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *val) |
020df079 GN |
686 | { |
687 | switch (dr) { | |
688 | case 0 ... 3: | |
689 | *val = vcpu->arch.db[dr]; | |
690 | break; | |
691 | case 4: | |
338dbc97 | 692 | if (kvm_read_cr4_bits(vcpu, X86_CR4_DE)) |
020df079 | 693 | return 1; |
020df079 GN |
694 | /* fall through */ |
695 | case 6: | |
696 | *val = vcpu->arch.dr6; | |
697 | break; | |
698 | case 5: | |
338dbc97 | 699 | if (kvm_read_cr4_bits(vcpu, X86_CR4_DE)) |
020df079 | 700 | return 1; |
020df079 GN |
701 | /* fall through */ |
702 | default: /* 7 */ | |
703 | *val = vcpu->arch.dr7; | |
704 | break; | |
705 | } | |
706 | ||
707 | return 0; | |
708 | } | |
338dbc97 GN |
709 | |
710 | int kvm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *val) | |
711 | { | |
712 | if (_kvm_get_dr(vcpu, dr, val)) { | |
713 | kvm_queue_exception(vcpu, UD_VECTOR); | |
714 | return 1; | |
715 | } | |
716 | return 0; | |
717 | } | |
020df079 GN |
718 | EXPORT_SYMBOL_GPL(kvm_get_dr); |
719 | ||
043405e1 CO |
720 | /* |
721 | * List of msr numbers which we expose to userspace through KVM_GET_MSRS | |
722 | * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST. | |
723 | * | |
724 | * This list is modified at module load time to reflect the | |
e3267cbb GC |
725 | * capabilities of the host cpu. This capabilities test skips MSRs that are |
726 | * kvm-specific. Those are put in the beginning of the list. | |
043405e1 | 727 | */ |
e3267cbb | 728 | |
11c6bffa | 729 | #define KVM_SAVE_MSRS_BEGIN 7 |
043405e1 | 730 | static u32 msrs_to_save[] = { |
e3267cbb | 731 | MSR_KVM_SYSTEM_TIME, MSR_KVM_WALL_CLOCK, |
11c6bffa | 732 | MSR_KVM_SYSTEM_TIME_NEW, MSR_KVM_WALL_CLOCK_NEW, |
55cd8e5a | 733 | HV_X64_MSR_GUEST_OS_ID, HV_X64_MSR_HYPERCALL, |
10388a07 | 734 | HV_X64_MSR_APIC_ASSIST_PAGE, |
043405e1 CO |
735 | MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP, |
736 | MSR_K6_STAR, | |
737 | #ifdef CONFIG_X86_64 | |
738 | MSR_CSTAR, MSR_KERNEL_GS_BASE, MSR_SYSCALL_MASK, MSR_LSTAR, | |
739 | #endif | |
e3267cbb | 740 | MSR_IA32_TSC, MSR_IA32_PERF_STATUS, MSR_IA32_CR_PAT, MSR_VM_HSAVE_PA |
043405e1 CO |
741 | }; |
742 | ||
743 | static unsigned num_msrs_to_save; | |
744 | ||
745 | static u32 emulated_msrs[] = { | |
746 | MSR_IA32_MISC_ENABLE, | |
908e75f3 AK |
747 | MSR_IA32_MCG_STATUS, |
748 | MSR_IA32_MCG_CTL, | |
043405e1 CO |
749 | }; |
750 | ||
b69e8cae | 751 | static int set_efer(struct kvm_vcpu *vcpu, u64 efer) |
15c4a640 | 752 | { |
aad82703 SY |
753 | u64 old_efer = vcpu->arch.efer; |
754 | ||
b69e8cae RJ |
755 | if (efer & efer_reserved_bits) |
756 | return 1; | |
15c4a640 CO |
757 | |
758 | if (is_paging(vcpu) | |
b69e8cae RJ |
759 | && (vcpu->arch.efer & EFER_LME) != (efer & EFER_LME)) |
760 | return 1; | |
15c4a640 | 761 | |
1b2fd70c AG |
762 | if (efer & EFER_FFXSR) { |
763 | struct kvm_cpuid_entry2 *feat; | |
764 | ||
765 | feat = kvm_find_cpuid_entry(vcpu, 0x80000001, 0); | |
b69e8cae RJ |
766 | if (!feat || !(feat->edx & bit(X86_FEATURE_FXSR_OPT))) |
767 | return 1; | |
1b2fd70c AG |
768 | } |
769 | ||
d8017474 AG |
770 | if (efer & EFER_SVME) { |
771 | struct kvm_cpuid_entry2 *feat; | |
772 | ||
773 | feat = kvm_find_cpuid_entry(vcpu, 0x80000001, 0); | |
b69e8cae RJ |
774 | if (!feat || !(feat->ecx & bit(X86_FEATURE_SVM))) |
775 | return 1; | |
d8017474 AG |
776 | } |
777 | ||
15c4a640 | 778 | efer &= ~EFER_LMA; |
f6801dff | 779 | efer |= vcpu->arch.efer & EFER_LMA; |
15c4a640 | 780 | |
a3d204e2 SY |
781 | kvm_x86_ops->set_efer(vcpu, efer); |
782 | ||
9645bb56 AK |
783 | vcpu->arch.mmu.base_role.nxe = (efer & EFER_NX) && !tdp_enabled; |
784 | kvm_mmu_reset_context(vcpu); | |
b69e8cae | 785 | |
aad82703 SY |
786 | /* Update reserved bits */ |
787 | if ((efer ^ old_efer) & EFER_NX) | |
788 | kvm_mmu_reset_context(vcpu); | |
789 | ||
b69e8cae | 790 | return 0; |
15c4a640 CO |
791 | } |
792 | ||
f2b4b7dd JR |
793 | void kvm_enable_efer_bits(u64 mask) |
794 | { | |
795 | efer_reserved_bits &= ~mask; | |
796 | } | |
797 | EXPORT_SYMBOL_GPL(kvm_enable_efer_bits); | |
798 | ||
799 | ||
15c4a640 CO |
800 | /* |
801 | * Writes msr value into into the appropriate "register". | |
802 | * Returns 0 on success, non-0 otherwise. | |
803 | * Assumes vcpu_load() was already called. | |
804 | */ | |
805 | int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data) | |
806 | { | |
807 | return kvm_x86_ops->set_msr(vcpu, msr_index, data); | |
808 | } | |
809 | ||
313a3dc7 CO |
810 | /* |
811 | * Adapt set_msr() to msr_io()'s calling convention | |
812 | */ | |
813 | static int do_set_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data) | |
814 | { | |
815 | return kvm_set_msr(vcpu, index, *data); | |
816 | } | |
817 | ||
18068523 GOC |
818 | static void kvm_write_wall_clock(struct kvm *kvm, gpa_t wall_clock) |
819 | { | |
9ed3c444 AK |
820 | int version; |
821 | int r; | |
50d0a0f9 | 822 | struct pvclock_wall_clock wc; |
923de3cf | 823 | struct timespec boot; |
18068523 GOC |
824 | |
825 | if (!wall_clock) | |
826 | return; | |
827 | ||
9ed3c444 AK |
828 | r = kvm_read_guest(kvm, wall_clock, &version, sizeof(version)); |
829 | if (r) | |
830 | return; | |
831 | ||
832 | if (version & 1) | |
833 | ++version; /* first time write, random junk */ | |
834 | ||
835 | ++version; | |
18068523 | 836 | |
18068523 GOC |
837 | kvm_write_guest(kvm, wall_clock, &version, sizeof(version)); |
838 | ||
50d0a0f9 GH |
839 | /* |
840 | * The guest calculates current wall clock time by adding | |
841 | * system time (updated by kvm_write_guest_time below) to the | |
842 | * wall clock specified here. guest system time equals host | |
843 | * system time for us, thus we must fill in host boot time here. | |
844 | */ | |
923de3cf | 845 | getboottime(&boot); |
50d0a0f9 GH |
846 | |
847 | wc.sec = boot.tv_sec; | |
848 | wc.nsec = boot.tv_nsec; | |
849 | wc.version = version; | |
18068523 GOC |
850 | |
851 | kvm_write_guest(kvm, wall_clock, &wc, sizeof(wc)); | |
852 | ||
853 | version++; | |
854 | kvm_write_guest(kvm, wall_clock, &version, sizeof(version)); | |
18068523 GOC |
855 | } |
856 | ||
50d0a0f9 GH |
857 | static uint32_t div_frac(uint32_t dividend, uint32_t divisor) |
858 | { | |
859 | uint32_t quotient, remainder; | |
860 | ||
861 | /* Don't try to replace with do_div(), this one calculates | |
862 | * "(dividend << 32) / divisor" */ | |
863 | __asm__ ( "divl %4" | |
864 | : "=a" (quotient), "=d" (remainder) | |
865 | : "0" (0), "1" (dividend), "r" (divisor) ); | |
866 | return quotient; | |
867 | } | |
868 | ||
869 | static void kvm_set_time_scale(uint32_t tsc_khz, struct pvclock_vcpu_time_info *hv_clock) | |
870 | { | |
871 | uint64_t nsecs = 1000000000LL; | |
872 | int32_t shift = 0; | |
873 | uint64_t tps64; | |
874 | uint32_t tps32; | |
875 | ||
876 | tps64 = tsc_khz * 1000LL; | |
877 | while (tps64 > nsecs*2) { | |
878 | tps64 >>= 1; | |
879 | shift--; | |
880 | } | |
881 | ||
882 | tps32 = (uint32_t)tps64; | |
883 | while (tps32 <= (uint32_t)nsecs) { | |
884 | tps32 <<= 1; | |
885 | shift++; | |
886 | } | |
887 | ||
888 | hv_clock->tsc_shift = shift; | |
889 | hv_clock->tsc_to_system_mul = div_frac(nsecs, tps32); | |
890 | ||
891 | pr_debug("%s: tsc_khz %u, tsc_shift %d, tsc_mul %u\n", | |
80a914dc | 892 | __func__, tsc_khz, hv_clock->tsc_shift, |
50d0a0f9 GH |
893 | hv_clock->tsc_to_system_mul); |
894 | } | |
895 | ||
c8076604 GH |
896 | static DEFINE_PER_CPU(unsigned long, cpu_tsc_khz); |
897 | ||
18068523 GOC |
898 | static void kvm_write_guest_time(struct kvm_vcpu *v) |
899 | { | |
900 | struct timespec ts; | |
901 | unsigned long flags; | |
902 | struct kvm_vcpu_arch *vcpu = &v->arch; | |
903 | void *shared_kaddr; | |
463656c0 | 904 | unsigned long this_tsc_khz; |
18068523 GOC |
905 | |
906 | if ((!vcpu->time_page)) | |
907 | return; | |
908 | ||
463656c0 AK |
909 | this_tsc_khz = get_cpu_var(cpu_tsc_khz); |
910 | if (unlikely(vcpu->hv_clock_tsc_khz != this_tsc_khz)) { | |
911 | kvm_set_time_scale(this_tsc_khz, &vcpu->hv_clock); | |
912 | vcpu->hv_clock_tsc_khz = this_tsc_khz; | |
50d0a0f9 | 913 | } |
463656c0 | 914 | put_cpu_var(cpu_tsc_khz); |
50d0a0f9 | 915 | |
18068523 GOC |
916 | /* Keep irq disabled to prevent changes to the clock */ |
917 | local_irq_save(flags); | |
af24a4e4 | 918 | kvm_get_msr(v, MSR_IA32_TSC, &vcpu->hv_clock.tsc_timestamp); |
18068523 | 919 | ktime_get_ts(&ts); |
923de3cf | 920 | monotonic_to_bootbased(&ts); |
18068523 GOC |
921 | local_irq_restore(flags); |
922 | ||
923 | /* With all the info we got, fill in the values */ | |
924 | ||
925 | vcpu->hv_clock.system_time = ts.tv_nsec + | |
afbcf7ab GC |
926 | (NSEC_PER_SEC * (u64)ts.tv_sec) + v->kvm->arch.kvmclock_offset; |
927 | ||
371bcf64 GC |
928 | vcpu->hv_clock.flags = 0; |
929 | ||
18068523 GOC |
930 | /* |
931 | * The interface expects us to write an even number signaling that the | |
932 | * update is finished. Since the guest won't see the intermediate | |
50d0a0f9 | 933 | * state, we just increase by 2 at the end. |
18068523 | 934 | */ |
50d0a0f9 | 935 | vcpu->hv_clock.version += 2; |
18068523 GOC |
936 | |
937 | shared_kaddr = kmap_atomic(vcpu->time_page, KM_USER0); | |
938 | ||
939 | memcpy(shared_kaddr + vcpu->time_offset, &vcpu->hv_clock, | |
50d0a0f9 | 940 | sizeof(vcpu->hv_clock)); |
18068523 GOC |
941 | |
942 | kunmap_atomic(shared_kaddr, KM_USER0); | |
943 | ||
944 | mark_page_dirty(v->kvm, vcpu->time >> PAGE_SHIFT); | |
945 | } | |
946 | ||
c8076604 GH |
947 | static int kvm_request_guest_time_update(struct kvm_vcpu *v) |
948 | { | |
949 | struct kvm_vcpu_arch *vcpu = &v->arch; | |
950 | ||
951 | if (!vcpu->time_page) | |
952 | return 0; | |
a8eeb04a | 953 | kvm_make_request(KVM_REQ_KVMCLOCK_UPDATE, v); |
c8076604 GH |
954 | return 1; |
955 | } | |
956 | ||
9ba075a6 AK |
957 | static bool msr_mtrr_valid(unsigned msr) |
958 | { | |
959 | switch (msr) { | |
960 | case 0x200 ... 0x200 + 2 * KVM_NR_VAR_MTRR - 1: | |
961 | case MSR_MTRRfix64K_00000: | |
962 | case MSR_MTRRfix16K_80000: | |
963 | case MSR_MTRRfix16K_A0000: | |
964 | case MSR_MTRRfix4K_C0000: | |
965 | case MSR_MTRRfix4K_C8000: | |
966 | case MSR_MTRRfix4K_D0000: | |
967 | case MSR_MTRRfix4K_D8000: | |
968 | case MSR_MTRRfix4K_E0000: | |
969 | case MSR_MTRRfix4K_E8000: | |
970 | case MSR_MTRRfix4K_F0000: | |
971 | case MSR_MTRRfix4K_F8000: | |
972 | case MSR_MTRRdefType: | |
973 | case MSR_IA32_CR_PAT: | |
974 | return true; | |
975 | case 0x2f8: | |
976 | return true; | |
977 | } | |
978 | return false; | |
979 | } | |
980 | ||
d6289b93 MT |
981 | static bool valid_pat_type(unsigned t) |
982 | { | |
983 | return t < 8 && (1 << t) & 0xf3; /* 0, 1, 4, 5, 6, 7 */ | |
984 | } | |
985 | ||
986 | static bool valid_mtrr_type(unsigned t) | |
987 | { | |
988 | return t < 8 && (1 << t) & 0x73; /* 0, 1, 4, 5, 6 */ | |
989 | } | |
990 | ||
991 | static bool mtrr_valid(struct kvm_vcpu *vcpu, u32 msr, u64 data) | |
992 | { | |
993 | int i; | |
994 | ||
995 | if (!msr_mtrr_valid(msr)) | |
996 | return false; | |
997 | ||
998 | if (msr == MSR_IA32_CR_PAT) { | |
999 | for (i = 0; i < 8; i++) | |
1000 | if (!valid_pat_type((data >> (i * 8)) & 0xff)) | |
1001 | return false; | |
1002 | return true; | |
1003 | } else if (msr == MSR_MTRRdefType) { | |
1004 | if (data & ~0xcff) | |
1005 | return false; | |
1006 | return valid_mtrr_type(data & 0xff); | |
1007 | } else if (msr >= MSR_MTRRfix64K_00000 && msr <= MSR_MTRRfix4K_F8000) { | |
1008 | for (i = 0; i < 8 ; i++) | |
1009 | if (!valid_mtrr_type((data >> (i * 8)) & 0xff)) | |
1010 | return false; | |
1011 | return true; | |
1012 | } | |
1013 | ||
1014 | /* variable MTRRs */ | |
1015 | return valid_mtrr_type(data & 0xff); | |
1016 | } | |
1017 | ||
9ba075a6 AK |
1018 | static int set_msr_mtrr(struct kvm_vcpu *vcpu, u32 msr, u64 data) |
1019 | { | |
0bed3b56 SY |
1020 | u64 *p = (u64 *)&vcpu->arch.mtrr_state.fixed_ranges; |
1021 | ||
d6289b93 | 1022 | if (!mtrr_valid(vcpu, msr, data)) |
9ba075a6 AK |
1023 | return 1; |
1024 | ||
0bed3b56 SY |
1025 | if (msr == MSR_MTRRdefType) { |
1026 | vcpu->arch.mtrr_state.def_type = data; | |
1027 | vcpu->arch.mtrr_state.enabled = (data & 0xc00) >> 10; | |
1028 | } else if (msr == MSR_MTRRfix64K_00000) | |
1029 | p[0] = data; | |
1030 | else if (msr == MSR_MTRRfix16K_80000 || msr == MSR_MTRRfix16K_A0000) | |
1031 | p[1 + msr - MSR_MTRRfix16K_80000] = data; | |
1032 | else if (msr >= MSR_MTRRfix4K_C0000 && msr <= MSR_MTRRfix4K_F8000) | |
1033 | p[3 + msr - MSR_MTRRfix4K_C0000] = data; | |
1034 | else if (msr == MSR_IA32_CR_PAT) | |
1035 | vcpu->arch.pat = data; | |
1036 | else { /* Variable MTRRs */ | |
1037 | int idx, is_mtrr_mask; | |
1038 | u64 *pt; | |
1039 | ||
1040 | idx = (msr - 0x200) / 2; | |
1041 | is_mtrr_mask = msr - 0x200 - 2 * idx; | |
1042 | if (!is_mtrr_mask) | |
1043 | pt = | |
1044 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].base_lo; | |
1045 | else | |
1046 | pt = | |
1047 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].mask_lo; | |
1048 | *pt = data; | |
1049 | } | |
1050 | ||
1051 | kvm_mmu_reset_context(vcpu); | |
9ba075a6 AK |
1052 | return 0; |
1053 | } | |
15c4a640 | 1054 | |
890ca9ae | 1055 | static int set_msr_mce(struct kvm_vcpu *vcpu, u32 msr, u64 data) |
15c4a640 | 1056 | { |
890ca9ae HY |
1057 | u64 mcg_cap = vcpu->arch.mcg_cap; |
1058 | unsigned bank_num = mcg_cap & 0xff; | |
1059 | ||
15c4a640 | 1060 | switch (msr) { |
15c4a640 | 1061 | case MSR_IA32_MCG_STATUS: |
890ca9ae | 1062 | vcpu->arch.mcg_status = data; |
15c4a640 | 1063 | break; |
c7ac679c | 1064 | case MSR_IA32_MCG_CTL: |
890ca9ae HY |
1065 | if (!(mcg_cap & MCG_CTL_P)) |
1066 | return 1; | |
1067 | if (data != 0 && data != ~(u64)0) | |
1068 | return -1; | |
1069 | vcpu->arch.mcg_ctl = data; | |
1070 | break; | |
1071 | default: | |
1072 | if (msr >= MSR_IA32_MC0_CTL && | |
1073 | msr < MSR_IA32_MC0_CTL + 4 * bank_num) { | |
1074 | u32 offset = msr - MSR_IA32_MC0_CTL; | |
114be429 AP |
1075 | /* only 0 or all 1s can be written to IA32_MCi_CTL |
1076 | * some Linux kernels though clear bit 10 in bank 4 to | |
1077 | * workaround a BIOS/GART TBL issue on AMD K8s, ignore | |
1078 | * this to avoid an uncatched #GP in the guest | |
1079 | */ | |
890ca9ae | 1080 | if ((offset & 0x3) == 0 && |
114be429 | 1081 | data != 0 && (data | (1 << 10)) != ~(u64)0) |
890ca9ae HY |
1082 | return -1; |
1083 | vcpu->arch.mce_banks[offset] = data; | |
1084 | break; | |
1085 | } | |
1086 | return 1; | |
1087 | } | |
1088 | return 0; | |
1089 | } | |
1090 | ||
ffde22ac ES |
1091 | static int xen_hvm_config(struct kvm_vcpu *vcpu, u64 data) |
1092 | { | |
1093 | struct kvm *kvm = vcpu->kvm; | |
1094 | int lm = is_long_mode(vcpu); | |
1095 | u8 *blob_addr = lm ? (u8 *)(long)kvm->arch.xen_hvm_config.blob_addr_64 | |
1096 | : (u8 *)(long)kvm->arch.xen_hvm_config.blob_addr_32; | |
1097 | u8 blob_size = lm ? kvm->arch.xen_hvm_config.blob_size_64 | |
1098 | : kvm->arch.xen_hvm_config.blob_size_32; | |
1099 | u32 page_num = data & ~PAGE_MASK; | |
1100 | u64 page_addr = data & PAGE_MASK; | |
1101 | u8 *page; | |
1102 | int r; | |
1103 | ||
1104 | r = -E2BIG; | |
1105 | if (page_num >= blob_size) | |
1106 | goto out; | |
1107 | r = -ENOMEM; | |
1108 | page = kzalloc(PAGE_SIZE, GFP_KERNEL); | |
1109 | if (!page) | |
1110 | goto out; | |
1111 | r = -EFAULT; | |
1112 | if (copy_from_user(page, blob_addr + (page_num * PAGE_SIZE), PAGE_SIZE)) | |
1113 | goto out_free; | |
1114 | if (kvm_write_guest(kvm, page_addr, page, PAGE_SIZE)) | |
1115 | goto out_free; | |
1116 | r = 0; | |
1117 | out_free: | |
1118 | kfree(page); | |
1119 | out: | |
1120 | return r; | |
1121 | } | |
1122 | ||
55cd8e5a GN |
1123 | static bool kvm_hv_hypercall_enabled(struct kvm *kvm) |
1124 | { | |
1125 | return kvm->arch.hv_hypercall & HV_X64_MSR_HYPERCALL_ENABLE; | |
1126 | } | |
1127 | ||
1128 | static bool kvm_hv_msr_partition_wide(u32 msr) | |
1129 | { | |
1130 | bool r = false; | |
1131 | switch (msr) { | |
1132 | case HV_X64_MSR_GUEST_OS_ID: | |
1133 | case HV_X64_MSR_HYPERCALL: | |
1134 | r = true; | |
1135 | break; | |
1136 | } | |
1137 | ||
1138 | return r; | |
1139 | } | |
1140 | ||
1141 | static int set_msr_hyperv_pw(struct kvm_vcpu *vcpu, u32 msr, u64 data) | |
1142 | { | |
1143 | struct kvm *kvm = vcpu->kvm; | |
1144 | ||
1145 | switch (msr) { | |
1146 | case HV_X64_MSR_GUEST_OS_ID: | |
1147 | kvm->arch.hv_guest_os_id = data; | |
1148 | /* setting guest os id to zero disables hypercall page */ | |
1149 | if (!kvm->arch.hv_guest_os_id) | |
1150 | kvm->arch.hv_hypercall &= ~HV_X64_MSR_HYPERCALL_ENABLE; | |
1151 | break; | |
1152 | case HV_X64_MSR_HYPERCALL: { | |
1153 | u64 gfn; | |
1154 | unsigned long addr; | |
1155 | u8 instructions[4]; | |
1156 | ||
1157 | /* if guest os id is not set hypercall should remain disabled */ | |
1158 | if (!kvm->arch.hv_guest_os_id) | |
1159 | break; | |
1160 | if (!(data & HV_X64_MSR_HYPERCALL_ENABLE)) { | |
1161 | kvm->arch.hv_hypercall = data; | |
1162 | break; | |
1163 | } | |
1164 | gfn = data >> HV_X64_MSR_HYPERCALL_PAGE_ADDRESS_SHIFT; | |
1165 | addr = gfn_to_hva(kvm, gfn); | |
1166 | if (kvm_is_error_hva(addr)) | |
1167 | return 1; | |
1168 | kvm_x86_ops->patch_hypercall(vcpu, instructions); | |
1169 | ((unsigned char *)instructions)[3] = 0xc3; /* ret */ | |
1170 | if (copy_to_user((void __user *)addr, instructions, 4)) | |
1171 | return 1; | |
1172 | kvm->arch.hv_hypercall = data; | |
1173 | break; | |
1174 | } | |
1175 | default: | |
1176 | pr_unimpl(vcpu, "HYPER-V unimplemented wrmsr: 0x%x " | |
1177 | "data 0x%llx\n", msr, data); | |
1178 | return 1; | |
1179 | } | |
1180 | return 0; | |
1181 | } | |
1182 | ||
1183 | static int set_msr_hyperv(struct kvm_vcpu *vcpu, u32 msr, u64 data) | |
1184 | { | |
10388a07 GN |
1185 | switch (msr) { |
1186 | case HV_X64_MSR_APIC_ASSIST_PAGE: { | |
1187 | unsigned long addr; | |
55cd8e5a | 1188 | |
10388a07 GN |
1189 | if (!(data & HV_X64_MSR_APIC_ASSIST_PAGE_ENABLE)) { |
1190 | vcpu->arch.hv_vapic = data; | |
1191 | break; | |
1192 | } | |
1193 | addr = gfn_to_hva(vcpu->kvm, data >> | |
1194 | HV_X64_MSR_APIC_ASSIST_PAGE_ADDRESS_SHIFT); | |
1195 | if (kvm_is_error_hva(addr)) | |
1196 | return 1; | |
1197 | if (clear_user((void __user *)addr, PAGE_SIZE)) | |
1198 | return 1; | |
1199 | vcpu->arch.hv_vapic = data; | |
1200 | break; | |
1201 | } | |
1202 | case HV_X64_MSR_EOI: | |
1203 | return kvm_hv_vapic_msr_write(vcpu, APIC_EOI, data); | |
1204 | case HV_X64_MSR_ICR: | |
1205 | return kvm_hv_vapic_msr_write(vcpu, APIC_ICR, data); | |
1206 | case HV_X64_MSR_TPR: | |
1207 | return kvm_hv_vapic_msr_write(vcpu, APIC_TASKPRI, data); | |
1208 | default: | |
1209 | pr_unimpl(vcpu, "HYPER-V unimplemented wrmsr: 0x%x " | |
1210 | "data 0x%llx\n", msr, data); | |
1211 | return 1; | |
1212 | } | |
1213 | ||
1214 | return 0; | |
55cd8e5a GN |
1215 | } |
1216 | ||
15c4a640 CO |
1217 | int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data) |
1218 | { | |
1219 | switch (msr) { | |
15c4a640 | 1220 | case MSR_EFER: |
b69e8cae | 1221 | return set_efer(vcpu, data); |
8f1589d9 AP |
1222 | case MSR_K7_HWCR: |
1223 | data &= ~(u64)0x40; /* ignore flush filter disable */ | |
82494028 | 1224 | data &= ~(u64)0x100; /* ignore ignne emulation enable */ |
8f1589d9 AP |
1225 | if (data != 0) { |
1226 | pr_unimpl(vcpu, "unimplemented HWCR wrmsr: 0x%llx\n", | |
1227 | data); | |
1228 | return 1; | |
1229 | } | |
15c4a640 | 1230 | break; |
f7c6d140 AP |
1231 | case MSR_FAM10H_MMIO_CONF_BASE: |
1232 | if (data != 0) { | |
1233 | pr_unimpl(vcpu, "unimplemented MMIO_CONF_BASE wrmsr: " | |
1234 | "0x%llx\n", data); | |
1235 | return 1; | |
1236 | } | |
15c4a640 | 1237 | break; |
c323c0e5 | 1238 | case MSR_AMD64_NB_CFG: |
c7ac679c | 1239 | break; |
b5e2fec0 AG |
1240 | case MSR_IA32_DEBUGCTLMSR: |
1241 | if (!data) { | |
1242 | /* We support the non-activated case already */ | |
1243 | break; | |
1244 | } else if (data & ~(DEBUGCTLMSR_LBR | DEBUGCTLMSR_BTF)) { | |
1245 | /* Values other than LBR and BTF are vendor-specific, | |
1246 | thus reserved and should throw a #GP */ | |
1247 | return 1; | |
1248 | } | |
1249 | pr_unimpl(vcpu, "%s: MSR_IA32_DEBUGCTLMSR 0x%llx, nop\n", | |
1250 | __func__, data); | |
1251 | break; | |
15c4a640 CO |
1252 | case MSR_IA32_UCODE_REV: |
1253 | case MSR_IA32_UCODE_WRITE: | |
61a6bd67 | 1254 | case MSR_VM_HSAVE_PA: |
6098ca93 | 1255 | case MSR_AMD64_PATCH_LOADER: |
15c4a640 | 1256 | break; |
9ba075a6 AK |
1257 | case 0x200 ... 0x2ff: |
1258 | return set_msr_mtrr(vcpu, msr, data); | |
15c4a640 CO |
1259 | case MSR_IA32_APICBASE: |
1260 | kvm_set_apic_base(vcpu, data); | |
1261 | break; | |
0105d1a5 GN |
1262 | case APIC_BASE_MSR ... APIC_BASE_MSR + 0x3ff: |
1263 | return kvm_x2apic_msr_write(vcpu, msr, data); | |
15c4a640 | 1264 | case MSR_IA32_MISC_ENABLE: |
ad312c7c | 1265 | vcpu->arch.ia32_misc_enable_msr = data; |
15c4a640 | 1266 | break; |
11c6bffa | 1267 | case MSR_KVM_WALL_CLOCK_NEW: |
18068523 GOC |
1268 | case MSR_KVM_WALL_CLOCK: |
1269 | vcpu->kvm->arch.wall_clock = data; | |
1270 | kvm_write_wall_clock(vcpu->kvm, data); | |
1271 | break; | |
11c6bffa | 1272 | case MSR_KVM_SYSTEM_TIME_NEW: |
18068523 GOC |
1273 | case MSR_KVM_SYSTEM_TIME: { |
1274 | if (vcpu->arch.time_page) { | |
1275 | kvm_release_page_dirty(vcpu->arch.time_page); | |
1276 | vcpu->arch.time_page = NULL; | |
1277 | } | |
1278 | ||
1279 | vcpu->arch.time = data; | |
1280 | ||
1281 | /* we verify if the enable bit is set... */ | |
1282 | if (!(data & 1)) | |
1283 | break; | |
1284 | ||
1285 | /* ...but clean it before doing the actual write */ | |
1286 | vcpu->arch.time_offset = data & ~(PAGE_MASK | 1); | |
1287 | ||
18068523 GOC |
1288 | vcpu->arch.time_page = |
1289 | gfn_to_page(vcpu->kvm, data >> PAGE_SHIFT); | |
18068523 GOC |
1290 | |
1291 | if (is_error_page(vcpu->arch.time_page)) { | |
1292 | kvm_release_page_clean(vcpu->arch.time_page); | |
1293 | vcpu->arch.time_page = NULL; | |
1294 | } | |
1295 | ||
c8076604 | 1296 | kvm_request_guest_time_update(vcpu); |
18068523 GOC |
1297 | break; |
1298 | } | |
890ca9ae HY |
1299 | case MSR_IA32_MCG_CTL: |
1300 | case MSR_IA32_MCG_STATUS: | |
1301 | case MSR_IA32_MC0_CTL ... MSR_IA32_MC0_CTL + 4 * KVM_MAX_MCE_BANKS - 1: | |
1302 | return set_msr_mce(vcpu, msr, data); | |
71db6023 AP |
1303 | |
1304 | /* Performance counters are not protected by a CPUID bit, | |
1305 | * so we should check all of them in the generic path for the sake of | |
1306 | * cross vendor migration. | |
1307 | * Writing a zero into the event select MSRs disables them, | |
1308 | * which we perfectly emulate ;-). Any other value should be at least | |
1309 | * reported, some guests depend on them. | |
1310 | */ | |
1311 | case MSR_P6_EVNTSEL0: | |
1312 | case MSR_P6_EVNTSEL1: | |
1313 | case MSR_K7_EVNTSEL0: | |
1314 | case MSR_K7_EVNTSEL1: | |
1315 | case MSR_K7_EVNTSEL2: | |
1316 | case MSR_K7_EVNTSEL3: | |
1317 | if (data != 0) | |
1318 | pr_unimpl(vcpu, "unimplemented perfctr wrmsr: " | |
1319 | "0x%x data 0x%llx\n", msr, data); | |
1320 | break; | |
1321 | /* at least RHEL 4 unconditionally writes to the perfctr registers, | |
1322 | * so we ignore writes to make it happy. | |
1323 | */ | |
1324 | case MSR_P6_PERFCTR0: | |
1325 | case MSR_P6_PERFCTR1: | |
1326 | case MSR_K7_PERFCTR0: | |
1327 | case MSR_K7_PERFCTR1: | |
1328 | case MSR_K7_PERFCTR2: | |
1329 | case MSR_K7_PERFCTR3: | |
1330 | pr_unimpl(vcpu, "unimplemented perfctr wrmsr: " | |
1331 | "0x%x data 0x%llx\n", msr, data); | |
1332 | break; | |
55cd8e5a GN |
1333 | case HV_X64_MSR_GUEST_OS_ID ... HV_X64_MSR_SINT15: |
1334 | if (kvm_hv_msr_partition_wide(msr)) { | |
1335 | int r; | |
1336 | mutex_lock(&vcpu->kvm->lock); | |
1337 | r = set_msr_hyperv_pw(vcpu, msr, data); | |
1338 | mutex_unlock(&vcpu->kvm->lock); | |
1339 | return r; | |
1340 | } else | |
1341 | return set_msr_hyperv(vcpu, msr, data); | |
1342 | break; | |
15c4a640 | 1343 | default: |
ffde22ac ES |
1344 | if (msr && (msr == vcpu->kvm->arch.xen_hvm_config.msr)) |
1345 | return xen_hvm_config(vcpu, data); | |
ed85c068 AP |
1346 | if (!ignore_msrs) { |
1347 | pr_unimpl(vcpu, "unhandled wrmsr: 0x%x data %llx\n", | |
1348 | msr, data); | |
1349 | return 1; | |
1350 | } else { | |
1351 | pr_unimpl(vcpu, "ignored wrmsr: 0x%x data %llx\n", | |
1352 | msr, data); | |
1353 | break; | |
1354 | } | |
15c4a640 CO |
1355 | } |
1356 | return 0; | |
1357 | } | |
1358 | EXPORT_SYMBOL_GPL(kvm_set_msr_common); | |
1359 | ||
1360 | ||
1361 | /* | |
1362 | * Reads an msr value (of 'msr_index') into 'pdata'. | |
1363 | * Returns 0 on success, non-0 otherwise. | |
1364 | * Assumes vcpu_load() was already called. | |
1365 | */ | |
1366 | int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata) | |
1367 | { | |
1368 | return kvm_x86_ops->get_msr(vcpu, msr_index, pdata); | |
1369 | } | |
1370 | ||
9ba075a6 AK |
1371 | static int get_msr_mtrr(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
1372 | { | |
0bed3b56 SY |
1373 | u64 *p = (u64 *)&vcpu->arch.mtrr_state.fixed_ranges; |
1374 | ||
9ba075a6 AK |
1375 | if (!msr_mtrr_valid(msr)) |
1376 | return 1; | |
1377 | ||
0bed3b56 SY |
1378 | if (msr == MSR_MTRRdefType) |
1379 | *pdata = vcpu->arch.mtrr_state.def_type + | |
1380 | (vcpu->arch.mtrr_state.enabled << 10); | |
1381 | else if (msr == MSR_MTRRfix64K_00000) | |
1382 | *pdata = p[0]; | |
1383 | else if (msr == MSR_MTRRfix16K_80000 || msr == MSR_MTRRfix16K_A0000) | |
1384 | *pdata = p[1 + msr - MSR_MTRRfix16K_80000]; | |
1385 | else if (msr >= MSR_MTRRfix4K_C0000 && msr <= MSR_MTRRfix4K_F8000) | |
1386 | *pdata = p[3 + msr - MSR_MTRRfix4K_C0000]; | |
1387 | else if (msr == MSR_IA32_CR_PAT) | |
1388 | *pdata = vcpu->arch.pat; | |
1389 | else { /* Variable MTRRs */ | |
1390 | int idx, is_mtrr_mask; | |
1391 | u64 *pt; | |
1392 | ||
1393 | idx = (msr - 0x200) / 2; | |
1394 | is_mtrr_mask = msr - 0x200 - 2 * idx; | |
1395 | if (!is_mtrr_mask) | |
1396 | pt = | |
1397 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].base_lo; | |
1398 | else | |
1399 | pt = | |
1400 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].mask_lo; | |
1401 | *pdata = *pt; | |
1402 | } | |
1403 | ||
9ba075a6 AK |
1404 | return 0; |
1405 | } | |
1406 | ||
890ca9ae | 1407 | static int get_msr_mce(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
15c4a640 CO |
1408 | { |
1409 | u64 data; | |
890ca9ae HY |
1410 | u64 mcg_cap = vcpu->arch.mcg_cap; |
1411 | unsigned bank_num = mcg_cap & 0xff; | |
15c4a640 CO |
1412 | |
1413 | switch (msr) { | |
15c4a640 CO |
1414 | case MSR_IA32_P5_MC_ADDR: |
1415 | case MSR_IA32_P5_MC_TYPE: | |
890ca9ae HY |
1416 | data = 0; |
1417 | break; | |
15c4a640 | 1418 | case MSR_IA32_MCG_CAP: |
890ca9ae HY |
1419 | data = vcpu->arch.mcg_cap; |
1420 | break; | |
c7ac679c | 1421 | case MSR_IA32_MCG_CTL: |
890ca9ae HY |
1422 | if (!(mcg_cap & MCG_CTL_P)) |
1423 | return 1; | |
1424 | data = vcpu->arch.mcg_ctl; | |
1425 | break; | |
1426 | case MSR_IA32_MCG_STATUS: | |
1427 | data = vcpu->arch.mcg_status; | |
1428 | break; | |
1429 | default: | |
1430 | if (msr >= MSR_IA32_MC0_CTL && | |
1431 | msr < MSR_IA32_MC0_CTL + 4 * bank_num) { | |
1432 | u32 offset = msr - MSR_IA32_MC0_CTL; | |
1433 | data = vcpu->arch.mce_banks[offset]; | |
1434 | break; | |
1435 | } | |
1436 | return 1; | |
1437 | } | |
1438 | *pdata = data; | |
1439 | return 0; | |
1440 | } | |
1441 | ||
55cd8e5a GN |
1442 | static int get_msr_hyperv_pw(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
1443 | { | |
1444 | u64 data = 0; | |
1445 | struct kvm *kvm = vcpu->kvm; | |
1446 | ||
1447 | switch (msr) { | |
1448 | case HV_X64_MSR_GUEST_OS_ID: | |
1449 | data = kvm->arch.hv_guest_os_id; | |
1450 | break; | |
1451 | case HV_X64_MSR_HYPERCALL: | |
1452 | data = kvm->arch.hv_hypercall; | |
1453 | break; | |
1454 | default: | |
1455 | pr_unimpl(vcpu, "Hyper-V unhandled rdmsr: 0x%x\n", msr); | |
1456 | return 1; | |
1457 | } | |
1458 | ||
1459 | *pdata = data; | |
1460 | return 0; | |
1461 | } | |
1462 | ||
1463 | static int get_msr_hyperv(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) | |
1464 | { | |
1465 | u64 data = 0; | |
1466 | ||
1467 | switch (msr) { | |
1468 | case HV_X64_MSR_VP_INDEX: { | |
1469 | int r; | |
1470 | struct kvm_vcpu *v; | |
1471 | kvm_for_each_vcpu(r, v, vcpu->kvm) | |
1472 | if (v == vcpu) | |
1473 | data = r; | |
1474 | break; | |
1475 | } | |
10388a07 GN |
1476 | case HV_X64_MSR_EOI: |
1477 | return kvm_hv_vapic_msr_read(vcpu, APIC_EOI, pdata); | |
1478 | case HV_X64_MSR_ICR: | |
1479 | return kvm_hv_vapic_msr_read(vcpu, APIC_ICR, pdata); | |
1480 | case HV_X64_MSR_TPR: | |
1481 | return kvm_hv_vapic_msr_read(vcpu, APIC_TASKPRI, pdata); | |
55cd8e5a GN |
1482 | default: |
1483 | pr_unimpl(vcpu, "Hyper-V unhandled rdmsr: 0x%x\n", msr); | |
1484 | return 1; | |
1485 | } | |
1486 | *pdata = data; | |
1487 | return 0; | |
1488 | } | |
1489 | ||
890ca9ae HY |
1490 | int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
1491 | { | |
1492 | u64 data; | |
1493 | ||
1494 | switch (msr) { | |
890ca9ae | 1495 | case MSR_IA32_PLATFORM_ID: |
15c4a640 | 1496 | case MSR_IA32_UCODE_REV: |
15c4a640 | 1497 | case MSR_IA32_EBL_CR_POWERON: |
b5e2fec0 AG |
1498 | case MSR_IA32_DEBUGCTLMSR: |
1499 | case MSR_IA32_LASTBRANCHFROMIP: | |
1500 | case MSR_IA32_LASTBRANCHTOIP: | |
1501 | case MSR_IA32_LASTINTFROMIP: | |
1502 | case MSR_IA32_LASTINTTOIP: | |
60af2ecd JSR |
1503 | case MSR_K8_SYSCFG: |
1504 | case MSR_K7_HWCR: | |
61a6bd67 | 1505 | case MSR_VM_HSAVE_PA: |
1f3ee616 AS |
1506 | case MSR_P6_PERFCTR0: |
1507 | case MSR_P6_PERFCTR1: | |
7fe29e0f AS |
1508 | case MSR_P6_EVNTSEL0: |
1509 | case MSR_P6_EVNTSEL1: | |
9e699624 | 1510 | case MSR_K7_EVNTSEL0: |
1f3ee616 | 1511 | case MSR_K7_PERFCTR0: |
1fdbd48c | 1512 | case MSR_K8_INT_PENDING_MSG: |
c323c0e5 | 1513 | case MSR_AMD64_NB_CFG: |
f7c6d140 | 1514 | case MSR_FAM10H_MMIO_CONF_BASE: |
15c4a640 CO |
1515 | data = 0; |
1516 | break; | |
9ba075a6 AK |
1517 | case MSR_MTRRcap: |
1518 | data = 0x500 | KVM_NR_VAR_MTRR; | |
1519 | break; | |
1520 | case 0x200 ... 0x2ff: | |
1521 | return get_msr_mtrr(vcpu, msr, pdata); | |
15c4a640 CO |
1522 | case 0xcd: /* fsb frequency */ |
1523 | data = 3; | |
1524 | break; | |
1525 | case MSR_IA32_APICBASE: | |
1526 | data = kvm_get_apic_base(vcpu); | |
1527 | break; | |
0105d1a5 GN |
1528 | case APIC_BASE_MSR ... APIC_BASE_MSR + 0x3ff: |
1529 | return kvm_x2apic_msr_read(vcpu, msr, pdata); | |
1530 | break; | |
15c4a640 | 1531 | case MSR_IA32_MISC_ENABLE: |
ad312c7c | 1532 | data = vcpu->arch.ia32_misc_enable_msr; |
15c4a640 | 1533 | break; |
847f0ad8 AG |
1534 | case MSR_IA32_PERF_STATUS: |
1535 | /* TSC increment by tick */ | |
1536 | data = 1000ULL; | |
1537 | /* CPU multiplier */ | |
1538 | data |= (((uint64_t)4ULL) << 40); | |
1539 | break; | |
15c4a640 | 1540 | case MSR_EFER: |
f6801dff | 1541 | data = vcpu->arch.efer; |
15c4a640 | 1542 | break; |
18068523 | 1543 | case MSR_KVM_WALL_CLOCK: |
11c6bffa | 1544 | case MSR_KVM_WALL_CLOCK_NEW: |
18068523 GOC |
1545 | data = vcpu->kvm->arch.wall_clock; |
1546 | break; | |
1547 | case MSR_KVM_SYSTEM_TIME: | |
11c6bffa | 1548 | case MSR_KVM_SYSTEM_TIME_NEW: |
18068523 GOC |
1549 | data = vcpu->arch.time; |
1550 | break; | |
890ca9ae HY |
1551 | case MSR_IA32_P5_MC_ADDR: |
1552 | case MSR_IA32_P5_MC_TYPE: | |
1553 | case MSR_IA32_MCG_CAP: | |
1554 | case MSR_IA32_MCG_CTL: | |
1555 | case MSR_IA32_MCG_STATUS: | |
1556 | case MSR_IA32_MC0_CTL ... MSR_IA32_MC0_CTL + 4 * KVM_MAX_MCE_BANKS - 1: | |
1557 | return get_msr_mce(vcpu, msr, pdata); | |
55cd8e5a GN |
1558 | case HV_X64_MSR_GUEST_OS_ID ... HV_X64_MSR_SINT15: |
1559 | if (kvm_hv_msr_partition_wide(msr)) { | |
1560 | int r; | |
1561 | mutex_lock(&vcpu->kvm->lock); | |
1562 | r = get_msr_hyperv_pw(vcpu, msr, pdata); | |
1563 | mutex_unlock(&vcpu->kvm->lock); | |
1564 | return r; | |
1565 | } else | |
1566 | return get_msr_hyperv(vcpu, msr, pdata); | |
1567 | break; | |
15c4a640 | 1568 | default: |
ed85c068 AP |
1569 | if (!ignore_msrs) { |
1570 | pr_unimpl(vcpu, "unhandled rdmsr: 0x%x\n", msr); | |
1571 | return 1; | |
1572 | } else { | |
1573 | pr_unimpl(vcpu, "ignored rdmsr: 0x%x\n", msr); | |
1574 | data = 0; | |
1575 | } | |
1576 | break; | |
15c4a640 CO |
1577 | } |
1578 | *pdata = data; | |
1579 | return 0; | |
1580 | } | |
1581 | EXPORT_SYMBOL_GPL(kvm_get_msr_common); | |
1582 | ||
313a3dc7 CO |
1583 | /* |
1584 | * Read or write a bunch of msrs. All parameters are kernel addresses. | |
1585 | * | |
1586 | * @return number of msrs set successfully. | |
1587 | */ | |
1588 | static int __msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs *msrs, | |
1589 | struct kvm_msr_entry *entries, | |
1590 | int (*do_msr)(struct kvm_vcpu *vcpu, | |
1591 | unsigned index, u64 *data)) | |
1592 | { | |
f656ce01 | 1593 | int i, idx; |
313a3dc7 | 1594 | |
f656ce01 | 1595 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
313a3dc7 CO |
1596 | for (i = 0; i < msrs->nmsrs; ++i) |
1597 | if (do_msr(vcpu, entries[i].index, &entries[i].data)) | |
1598 | break; | |
f656ce01 | 1599 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
313a3dc7 | 1600 | |
313a3dc7 CO |
1601 | return i; |
1602 | } | |
1603 | ||
1604 | /* | |
1605 | * Read or write a bunch of msrs. Parameters are user addresses. | |
1606 | * | |
1607 | * @return number of msrs set successfully. | |
1608 | */ | |
1609 | static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs, | |
1610 | int (*do_msr)(struct kvm_vcpu *vcpu, | |
1611 | unsigned index, u64 *data), | |
1612 | int writeback) | |
1613 | { | |
1614 | struct kvm_msrs msrs; | |
1615 | struct kvm_msr_entry *entries; | |
1616 | int r, n; | |
1617 | unsigned size; | |
1618 | ||
1619 | r = -EFAULT; | |
1620 | if (copy_from_user(&msrs, user_msrs, sizeof msrs)) | |
1621 | goto out; | |
1622 | ||
1623 | r = -E2BIG; | |
1624 | if (msrs.nmsrs >= MAX_IO_MSRS) | |
1625 | goto out; | |
1626 | ||
1627 | r = -ENOMEM; | |
1628 | size = sizeof(struct kvm_msr_entry) * msrs.nmsrs; | |
7a73c028 | 1629 | entries = kmalloc(size, GFP_KERNEL); |
313a3dc7 CO |
1630 | if (!entries) |
1631 | goto out; | |
1632 | ||
1633 | r = -EFAULT; | |
1634 | if (copy_from_user(entries, user_msrs->entries, size)) | |
1635 | goto out_free; | |
1636 | ||
1637 | r = n = __msr_io(vcpu, &msrs, entries, do_msr); | |
1638 | if (r < 0) | |
1639 | goto out_free; | |
1640 | ||
1641 | r = -EFAULT; | |
1642 | if (writeback && copy_to_user(user_msrs->entries, entries, size)) | |
1643 | goto out_free; | |
1644 | ||
1645 | r = n; | |
1646 | ||
1647 | out_free: | |
7a73c028 | 1648 | kfree(entries); |
313a3dc7 CO |
1649 | out: |
1650 | return r; | |
1651 | } | |
1652 | ||
018d00d2 ZX |
1653 | int kvm_dev_ioctl_check_extension(long ext) |
1654 | { | |
1655 | int r; | |
1656 | ||
1657 | switch (ext) { | |
1658 | case KVM_CAP_IRQCHIP: | |
1659 | case KVM_CAP_HLT: | |
1660 | case KVM_CAP_MMU_SHADOW_CACHE_CONTROL: | |
018d00d2 | 1661 | case KVM_CAP_SET_TSS_ADDR: |
07716717 | 1662 | case KVM_CAP_EXT_CPUID: |
c8076604 | 1663 | case KVM_CAP_CLOCKSOURCE: |
7837699f | 1664 | case KVM_CAP_PIT: |
a28e4f5a | 1665 | case KVM_CAP_NOP_IO_DELAY: |
62d9f0db | 1666 | case KVM_CAP_MP_STATE: |
ed848624 | 1667 | case KVM_CAP_SYNC_MMU: |
52d939a0 | 1668 | case KVM_CAP_REINJECT_CONTROL: |
4925663a | 1669 | case KVM_CAP_IRQ_INJECT_STATUS: |
e56d532f | 1670 | case KVM_CAP_ASSIGN_DEV_IRQ: |
721eecbf | 1671 | case KVM_CAP_IRQFD: |
d34e6b17 | 1672 | case KVM_CAP_IOEVENTFD: |
c5ff41ce | 1673 | case KVM_CAP_PIT2: |
e9f42757 | 1674 | case KVM_CAP_PIT_STATE2: |
b927a3ce | 1675 | case KVM_CAP_SET_IDENTITY_MAP_ADDR: |
ffde22ac | 1676 | case KVM_CAP_XEN_HVM: |
afbcf7ab | 1677 | case KVM_CAP_ADJUST_CLOCK: |
3cfc3092 | 1678 | case KVM_CAP_VCPU_EVENTS: |
55cd8e5a | 1679 | case KVM_CAP_HYPERV: |
10388a07 | 1680 | case KVM_CAP_HYPERV_VAPIC: |
c25bc163 | 1681 | case KVM_CAP_HYPERV_SPIN: |
ab9f4ecb | 1682 | case KVM_CAP_PCI_SEGMENT: |
a1efbe77 | 1683 | case KVM_CAP_DEBUGREGS: |
d2be1651 | 1684 | case KVM_CAP_X86_ROBUST_SINGLESTEP: |
2d5b5a66 | 1685 | case KVM_CAP_XSAVE: |
018d00d2 ZX |
1686 | r = 1; |
1687 | break; | |
542472b5 LV |
1688 | case KVM_CAP_COALESCED_MMIO: |
1689 | r = KVM_COALESCED_MMIO_PAGE_OFFSET; | |
1690 | break; | |
774ead3a AK |
1691 | case KVM_CAP_VAPIC: |
1692 | r = !kvm_x86_ops->cpu_has_accelerated_tpr(); | |
1693 | break; | |
f725230a AK |
1694 | case KVM_CAP_NR_VCPUS: |
1695 | r = KVM_MAX_VCPUS; | |
1696 | break; | |
a988b910 AK |
1697 | case KVM_CAP_NR_MEMSLOTS: |
1698 | r = KVM_MEMORY_SLOTS; | |
1699 | break; | |
a68a6a72 MT |
1700 | case KVM_CAP_PV_MMU: /* obsolete */ |
1701 | r = 0; | |
2f333bcb | 1702 | break; |
62c476c7 | 1703 | case KVM_CAP_IOMMU: |
19de40a8 | 1704 | r = iommu_found(); |
62c476c7 | 1705 | break; |
890ca9ae HY |
1706 | case KVM_CAP_MCE: |
1707 | r = KVM_MAX_MCE_BANKS; | |
1708 | break; | |
2d5b5a66 SY |
1709 | case KVM_CAP_XCRS: |
1710 | r = cpu_has_xsave; | |
1711 | break; | |
018d00d2 ZX |
1712 | default: |
1713 | r = 0; | |
1714 | break; | |
1715 | } | |
1716 | return r; | |
1717 | ||
1718 | } | |
1719 | ||
043405e1 CO |
1720 | long kvm_arch_dev_ioctl(struct file *filp, |
1721 | unsigned int ioctl, unsigned long arg) | |
1722 | { | |
1723 | void __user *argp = (void __user *)arg; | |
1724 | long r; | |
1725 | ||
1726 | switch (ioctl) { | |
1727 | case KVM_GET_MSR_INDEX_LIST: { | |
1728 | struct kvm_msr_list __user *user_msr_list = argp; | |
1729 | struct kvm_msr_list msr_list; | |
1730 | unsigned n; | |
1731 | ||
1732 | r = -EFAULT; | |
1733 | if (copy_from_user(&msr_list, user_msr_list, sizeof msr_list)) | |
1734 | goto out; | |
1735 | n = msr_list.nmsrs; | |
1736 | msr_list.nmsrs = num_msrs_to_save + ARRAY_SIZE(emulated_msrs); | |
1737 | if (copy_to_user(user_msr_list, &msr_list, sizeof msr_list)) | |
1738 | goto out; | |
1739 | r = -E2BIG; | |
e125e7b6 | 1740 | if (n < msr_list.nmsrs) |
043405e1 CO |
1741 | goto out; |
1742 | r = -EFAULT; | |
1743 | if (copy_to_user(user_msr_list->indices, &msrs_to_save, | |
1744 | num_msrs_to_save * sizeof(u32))) | |
1745 | goto out; | |
e125e7b6 | 1746 | if (copy_to_user(user_msr_list->indices + num_msrs_to_save, |
043405e1 CO |
1747 | &emulated_msrs, |
1748 | ARRAY_SIZE(emulated_msrs) * sizeof(u32))) | |
1749 | goto out; | |
1750 | r = 0; | |
1751 | break; | |
1752 | } | |
674eea0f AK |
1753 | case KVM_GET_SUPPORTED_CPUID: { |
1754 | struct kvm_cpuid2 __user *cpuid_arg = argp; | |
1755 | struct kvm_cpuid2 cpuid; | |
1756 | ||
1757 | r = -EFAULT; | |
1758 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
1759 | goto out; | |
1760 | r = kvm_dev_ioctl_get_supported_cpuid(&cpuid, | |
19355475 | 1761 | cpuid_arg->entries); |
674eea0f AK |
1762 | if (r) |
1763 | goto out; | |
1764 | ||
1765 | r = -EFAULT; | |
1766 | if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid)) | |
1767 | goto out; | |
1768 | r = 0; | |
1769 | break; | |
1770 | } | |
890ca9ae HY |
1771 | case KVM_X86_GET_MCE_CAP_SUPPORTED: { |
1772 | u64 mce_cap; | |
1773 | ||
1774 | mce_cap = KVM_MCE_CAP_SUPPORTED; | |
1775 | r = -EFAULT; | |
1776 | if (copy_to_user(argp, &mce_cap, sizeof mce_cap)) | |
1777 | goto out; | |
1778 | r = 0; | |
1779 | break; | |
1780 | } | |
043405e1 CO |
1781 | default: |
1782 | r = -EINVAL; | |
1783 | } | |
1784 | out: | |
1785 | return r; | |
1786 | } | |
1787 | ||
f5f48ee1 SY |
1788 | static void wbinvd_ipi(void *garbage) |
1789 | { | |
1790 | wbinvd(); | |
1791 | } | |
1792 | ||
1793 | static bool need_emulate_wbinvd(struct kvm_vcpu *vcpu) | |
1794 | { | |
1795 | return vcpu->kvm->arch.iommu_domain && | |
1796 | !(vcpu->kvm->arch.iommu_flags & KVM_IOMMU_CACHE_COHERENCY); | |
1797 | } | |
1798 | ||
313a3dc7 CO |
1799 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
1800 | { | |
f5f48ee1 SY |
1801 | /* Address WBINVD may be executed by guest */ |
1802 | if (need_emulate_wbinvd(vcpu)) { | |
1803 | if (kvm_x86_ops->has_wbinvd_exit()) | |
1804 | cpumask_set_cpu(cpu, vcpu->arch.wbinvd_dirty_mask); | |
1805 | else if (vcpu->cpu != -1 && vcpu->cpu != cpu) | |
1806 | smp_call_function_single(vcpu->cpu, | |
1807 | wbinvd_ipi, NULL, 1); | |
1808 | } | |
1809 | ||
313a3dc7 | 1810 | kvm_x86_ops->vcpu_load(vcpu, cpu); |
6b7d7e76 ZA |
1811 | if (unlikely(per_cpu(cpu_tsc_khz, cpu) == 0)) { |
1812 | unsigned long khz = cpufreq_quick_get(cpu); | |
1813 | if (!khz) | |
1814 | khz = tsc_khz; | |
1815 | per_cpu(cpu_tsc_khz, cpu) = khz; | |
1816 | } | |
c8076604 | 1817 | kvm_request_guest_time_update(vcpu); |
313a3dc7 CO |
1818 | } |
1819 | ||
1820 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
1821 | { | |
02daab21 | 1822 | kvm_x86_ops->vcpu_put(vcpu); |
1c11e713 | 1823 | kvm_put_guest_fpu(vcpu); |
313a3dc7 CO |
1824 | } |
1825 | ||
07716717 | 1826 | static int is_efer_nx(void) |
313a3dc7 | 1827 | { |
e286e86e | 1828 | unsigned long long efer = 0; |
313a3dc7 | 1829 | |
e286e86e | 1830 | rdmsrl_safe(MSR_EFER, &efer); |
07716717 DK |
1831 | return efer & EFER_NX; |
1832 | } | |
1833 | ||
1834 | static void cpuid_fix_nx_cap(struct kvm_vcpu *vcpu) | |
1835 | { | |
1836 | int i; | |
1837 | struct kvm_cpuid_entry2 *e, *entry; | |
1838 | ||
313a3dc7 | 1839 | entry = NULL; |
ad312c7c ZX |
1840 | for (i = 0; i < vcpu->arch.cpuid_nent; ++i) { |
1841 | e = &vcpu->arch.cpuid_entries[i]; | |
313a3dc7 CO |
1842 | if (e->function == 0x80000001) { |
1843 | entry = e; | |
1844 | break; | |
1845 | } | |
1846 | } | |
07716717 | 1847 | if (entry && (entry->edx & (1 << 20)) && !is_efer_nx()) { |
313a3dc7 CO |
1848 | entry->edx &= ~(1 << 20); |
1849 | printk(KERN_INFO "kvm: guest NX capability removed\n"); | |
1850 | } | |
1851 | } | |
1852 | ||
07716717 | 1853 | /* when an old userspace process fills a new kernel module */ |
313a3dc7 CO |
1854 | static int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu *vcpu, |
1855 | struct kvm_cpuid *cpuid, | |
1856 | struct kvm_cpuid_entry __user *entries) | |
07716717 DK |
1857 | { |
1858 | int r, i; | |
1859 | struct kvm_cpuid_entry *cpuid_entries; | |
1860 | ||
1861 | r = -E2BIG; | |
1862 | if (cpuid->nent > KVM_MAX_CPUID_ENTRIES) | |
1863 | goto out; | |
1864 | r = -ENOMEM; | |
1865 | cpuid_entries = vmalloc(sizeof(struct kvm_cpuid_entry) * cpuid->nent); | |
1866 | if (!cpuid_entries) | |
1867 | goto out; | |
1868 | r = -EFAULT; | |
1869 | if (copy_from_user(cpuid_entries, entries, | |
1870 | cpuid->nent * sizeof(struct kvm_cpuid_entry))) | |
1871 | goto out_free; | |
1872 | for (i = 0; i < cpuid->nent; i++) { | |
ad312c7c ZX |
1873 | vcpu->arch.cpuid_entries[i].function = cpuid_entries[i].function; |
1874 | vcpu->arch.cpuid_entries[i].eax = cpuid_entries[i].eax; | |
1875 | vcpu->arch.cpuid_entries[i].ebx = cpuid_entries[i].ebx; | |
1876 | vcpu->arch.cpuid_entries[i].ecx = cpuid_entries[i].ecx; | |
1877 | vcpu->arch.cpuid_entries[i].edx = cpuid_entries[i].edx; | |
1878 | vcpu->arch.cpuid_entries[i].index = 0; | |
1879 | vcpu->arch.cpuid_entries[i].flags = 0; | |
1880 | vcpu->arch.cpuid_entries[i].padding[0] = 0; | |
1881 | vcpu->arch.cpuid_entries[i].padding[1] = 0; | |
1882 | vcpu->arch.cpuid_entries[i].padding[2] = 0; | |
1883 | } | |
1884 | vcpu->arch.cpuid_nent = cpuid->nent; | |
07716717 DK |
1885 | cpuid_fix_nx_cap(vcpu); |
1886 | r = 0; | |
fc61b800 | 1887 | kvm_apic_set_version(vcpu); |
0e851880 | 1888 | kvm_x86_ops->cpuid_update(vcpu); |
2acf923e | 1889 | update_cpuid(vcpu); |
07716717 DK |
1890 | |
1891 | out_free: | |
1892 | vfree(cpuid_entries); | |
1893 | out: | |
1894 | return r; | |
1895 | } | |
1896 | ||
1897 | static int kvm_vcpu_ioctl_set_cpuid2(struct kvm_vcpu *vcpu, | |
19355475 AS |
1898 | struct kvm_cpuid2 *cpuid, |
1899 | struct kvm_cpuid_entry2 __user *entries) | |
313a3dc7 CO |
1900 | { |
1901 | int r; | |
1902 | ||
1903 | r = -E2BIG; | |
1904 | if (cpuid->nent > KVM_MAX_CPUID_ENTRIES) | |
1905 | goto out; | |
1906 | r = -EFAULT; | |
ad312c7c | 1907 | if (copy_from_user(&vcpu->arch.cpuid_entries, entries, |
07716717 | 1908 | cpuid->nent * sizeof(struct kvm_cpuid_entry2))) |
313a3dc7 | 1909 | goto out; |
ad312c7c | 1910 | vcpu->arch.cpuid_nent = cpuid->nent; |
fc61b800 | 1911 | kvm_apic_set_version(vcpu); |
0e851880 | 1912 | kvm_x86_ops->cpuid_update(vcpu); |
2acf923e | 1913 | update_cpuid(vcpu); |
313a3dc7 CO |
1914 | return 0; |
1915 | ||
1916 | out: | |
1917 | return r; | |
1918 | } | |
1919 | ||
07716717 | 1920 | static int kvm_vcpu_ioctl_get_cpuid2(struct kvm_vcpu *vcpu, |
19355475 AS |
1921 | struct kvm_cpuid2 *cpuid, |
1922 | struct kvm_cpuid_entry2 __user *entries) | |
07716717 DK |
1923 | { |
1924 | int r; | |
1925 | ||
1926 | r = -E2BIG; | |
ad312c7c | 1927 | if (cpuid->nent < vcpu->arch.cpuid_nent) |
07716717 DK |
1928 | goto out; |
1929 | r = -EFAULT; | |
ad312c7c | 1930 | if (copy_to_user(entries, &vcpu->arch.cpuid_entries, |
19355475 | 1931 | vcpu->arch.cpuid_nent * sizeof(struct kvm_cpuid_entry2))) |
07716717 DK |
1932 | goto out; |
1933 | return 0; | |
1934 | ||
1935 | out: | |
ad312c7c | 1936 | cpuid->nent = vcpu->arch.cpuid_nent; |
07716717 DK |
1937 | return r; |
1938 | } | |
1939 | ||
07716717 | 1940 | static void do_cpuid_1_ent(struct kvm_cpuid_entry2 *entry, u32 function, |
19355475 | 1941 | u32 index) |
07716717 DK |
1942 | { |
1943 | entry->function = function; | |
1944 | entry->index = index; | |
1945 | cpuid_count(entry->function, entry->index, | |
19355475 | 1946 | &entry->eax, &entry->ebx, &entry->ecx, &entry->edx); |
07716717 DK |
1947 | entry->flags = 0; |
1948 | } | |
1949 | ||
7faa4ee1 AK |
1950 | #define F(x) bit(X86_FEATURE_##x) |
1951 | ||
07716717 DK |
1952 | static void do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function, |
1953 | u32 index, int *nent, int maxnent) | |
1954 | { | |
7faa4ee1 | 1955 | unsigned f_nx = is_efer_nx() ? F(NX) : 0; |
07716717 | 1956 | #ifdef CONFIG_X86_64 |
17cc3935 SY |
1957 | unsigned f_gbpages = (kvm_x86_ops->get_lpage_level() == PT_PDPE_LEVEL) |
1958 | ? F(GBPAGES) : 0; | |
7faa4ee1 AK |
1959 | unsigned f_lm = F(LM); |
1960 | #else | |
17cc3935 | 1961 | unsigned f_gbpages = 0; |
7faa4ee1 | 1962 | unsigned f_lm = 0; |
07716717 | 1963 | #endif |
4e47c7a6 | 1964 | unsigned f_rdtscp = kvm_x86_ops->rdtscp_supported() ? F(RDTSCP) : 0; |
7faa4ee1 AK |
1965 | |
1966 | /* cpuid 1.edx */ | |
1967 | const u32 kvm_supported_word0_x86_features = | |
1968 | F(FPU) | F(VME) | F(DE) | F(PSE) | | |
1969 | F(TSC) | F(MSR) | F(PAE) | F(MCE) | | |
1970 | F(CX8) | F(APIC) | 0 /* Reserved */ | F(SEP) | | |
1971 | F(MTRR) | F(PGE) | F(MCA) | F(CMOV) | | |
1972 | F(PAT) | F(PSE36) | 0 /* PSN */ | F(CLFLSH) | | |
1973 | 0 /* Reserved, DS, ACPI */ | F(MMX) | | |
1974 | F(FXSR) | F(XMM) | F(XMM2) | F(SELFSNOOP) | | |
1975 | 0 /* HTT, TM, Reserved, PBE */; | |
1976 | /* cpuid 0x80000001.edx */ | |
1977 | const u32 kvm_supported_word1_x86_features = | |
1978 | F(FPU) | F(VME) | F(DE) | F(PSE) | | |
1979 | F(TSC) | F(MSR) | F(PAE) | F(MCE) | | |
1980 | F(CX8) | F(APIC) | 0 /* Reserved */ | F(SYSCALL) | | |
1981 | F(MTRR) | F(PGE) | F(MCA) | F(CMOV) | | |
1982 | F(PAT) | F(PSE36) | 0 /* Reserved */ | | |
1983 | f_nx | 0 /* Reserved */ | F(MMXEXT) | F(MMX) | | |
4e47c7a6 | 1984 | F(FXSR) | F(FXSR_OPT) | f_gbpages | f_rdtscp | |
7faa4ee1 AK |
1985 | 0 /* Reserved */ | f_lm | F(3DNOWEXT) | F(3DNOW); |
1986 | /* cpuid 1.ecx */ | |
1987 | const u32 kvm_supported_word4_x86_features = | |
6c3f6041 | 1988 | F(XMM3) | F(PCLMULQDQ) | 0 /* DTES64, MONITOR */ | |
d149c731 AK |
1989 | 0 /* DS-CPL, VMX, SMX, EST */ | |
1990 | 0 /* TM2 */ | F(SSSE3) | 0 /* CNXT-ID */ | 0 /* Reserved */ | | |
1991 | 0 /* Reserved */ | F(CX16) | 0 /* xTPR Update, PDCM */ | | |
1992 | 0 /* Reserved, DCA */ | F(XMM4_1) | | |
0105d1a5 | 1993 | F(XMM4_2) | F(X2APIC) | F(MOVBE) | F(POPCNT) | |
6c3f6041 | 1994 | 0 /* Reserved, AES */ | F(XSAVE) | 0 /* OSXSAVE */ | F(AVX); |
7faa4ee1 | 1995 | /* cpuid 0x80000001.ecx */ |
07716717 | 1996 | const u32 kvm_supported_word6_x86_features = |
7faa4ee1 AK |
1997 | F(LAHF_LM) | F(CMP_LEGACY) | F(SVM) | 0 /* ExtApicSpace */ | |
1998 | F(CR8_LEGACY) | F(ABM) | F(SSE4A) | F(MISALIGNSSE) | | |
1999 | F(3DNOWPREFETCH) | 0 /* OSVW */ | 0 /* IBS */ | F(SSE5) | | |
2000 | 0 /* SKINIT */ | 0 /* WDT */; | |
07716717 | 2001 | |
19355475 | 2002 | /* all calls to cpuid_count() should be made on the same cpu */ |
07716717 DK |
2003 | get_cpu(); |
2004 | do_cpuid_1_ent(entry, function, index); | |
2005 | ++*nent; | |
2006 | ||
2007 | switch (function) { | |
2008 | case 0: | |
2acf923e | 2009 | entry->eax = min(entry->eax, (u32)0xd); |
07716717 DK |
2010 | break; |
2011 | case 1: | |
2012 | entry->edx &= kvm_supported_word0_x86_features; | |
7faa4ee1 | 2013 | entry->ecx &= kvm_supported_word4_x86_features; |
0d1de2d9 GN |
2014 | /* we support x2apic emulation even if host does not support |
2015 | * it since we emulate x2apic in software */ | |
2016 | entry->ecx |= F(X2APIC); | |
07716717 DK |
2017 | break; |
2018 | /* function 2 entries are STATEFUL. That is, repeated cpuid commands | |
2019 | * may return different values. This forces us to get_cpu() before | |
2020 | * issuing the first command, and also to emulate this annoying behavior | |
2021 | * in kvm_emulate_cpuid() using KVM_CPUID_FLAG_STATE_READ_NEXT */ | |
2022 | case 2: { | |
2023 | int t, times = entry->eax & 0xff; | |
2024 | ||
2025 | entry->flags |= KVM_CPUID_FLAG_STATEFUL_FUNC; | |
0fdf8e59 | 2026 | entry->flags |= KVM_CPUID_FLAG_STATE_READ_NEXT; |
07716717 DK |
2027 | for (t = 1; t < times && *nent < maxnent; ++t) { |
2028 | do_cpuid_1_ent(&entry[t], function, 0); | |
2029 | entry[t].flags |= KVM_CPUID_FLAG_STATEFUL_FUNC; | |
2030 | ++*nent; | |
2031 | } | |
2032 | break; | |
2033 | } | |
2034 | /* function 4 and 0xb have additional index. */ | |
2035 | case 4: { | |
14af3f3c | 2036 | int i, cache_type; |
07716717 DK |
2037 | |
2038 | entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX; | |
2039 | /* read more entries until cache_type is zero */ | |
14af3f3c HH |
2040 | for (i = 1; *nent < maxnent; ++i) { |
2041 | cache_type = entry[i - 1].eax & 0x1f; | |
07716717 DK |
2042 | if (!cache_type) |
2043 | break; | |
14af3f3c HH |
2044 | do_cpuid_1_ent(&entry[i], function, i); |
2045 | entry[i].flags |= | |
07716717 DK |
2046 | KVM_CPUID_FLAG_SIGNIFCANT_INDEX; |
2047 | ++*nent; | |
2048 | } | |
2049 | break; | |
2050 | } | |
2051 | case 0xb: { | |
14af3f3c | 2052 | int i, level_type; |
07716717 DK |
2053 | |
2054 | entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX; | |
2055 | /* read more entries until level_type is zero */ | |
14af3f3c | 2056 | for (i = 1; *nent < maxnent; ++i) { |
0853d2c1 | 2057 | level_type = entry[i - 1].ecx & 0xff00; |
07716717 DK |
2058 | if (!level_type) |
2059 | break; | |
14af3f3c HH |
2060 | do_cpuid_1_ent(&entry[i], function, i); |
2061 | entry[i].flags |= | |
07716717 DK |
2062 | KVM_CPUID_FLAG_SIGNIFCANT_INDEX; |
2063 | ++*nent; | |
2064 | } | |
2065 | break; | |
2066 | } | |
2acf923e DC |
2067 | case 0xd: { |
2068 | int i; | |
2069 | ||
2070 | entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX; | |
2071 | for (i = 1; *nent < maxnent; ++i) { | |
2072 | if (entry[i - 1].eax == 0 && i != 2) | |
2073 | break; | |
2074 | do_cpuid_1_ent(&entry[i], function, i); | |
2075 | entry[i].flags |= | |
2076 | KVM_CPUID_FLAG_SIGNIFCANT_INDEX; | |
2077 | ++*nent; | |
2078 | } | |
2079 | break; | |
2080 | } | |
84478c82 GC |
2081 | case KVM_CPUID_SIGNATURE: { |
2082 | char signature[12] = "KVMKVMKVM\0\0"; | |
2083 | u32 *sigptr = (u32 *)signature; | |
2084 | entry->eax = 0; | |
2085 | entry->ebx = sigptr[0]; | |
2086 | entry->ecx = sigptr[1]; | |
2087 | entry->edx = sigptr[2]; | |
2088 | break; | |
2089 | } | |
2090 | case KVM_CPUID_FEATURES: | |
2091 | entry->eax = (1 << KVM_FEATURE_CLOCKSOURCE) | | |
2092 | (1 << KVM_FEATURE_NOP_IO_DELAY) | | |
371bcf64 GC |
2093 | (1 << KVM_FEATURE_CLOCKSOURCE2) | |
2094 | (1 << KVM_FEATURE_CLOCKSOURCE_STABLE_BIT); | |
84478c82 GC |
2095 | entry->ebx = 0; |
2096 | entry->ecx = 0; | |
2097 | entry->edx = 0; | |
2098 | break; | |
07716717 DK |
2099 | case 0x80000000: |
2100 | entry->eax = min(entry->eax, 0x8000001a); | |
2101 | break; | |
2102 | case 0x80000001: | |
2103 | entry->edx &= kvm_supported_word1_x86_features; | |
2104 | entry->ecx &= kvm_supported_word6_x86_features; | |
2105 | break; | |
2106 | } | |
d4330ef2 JR |
2107 | |
2108 | kvm_x86_ops->set_supported_cpuid(function, entry); | |
2109 | ||
07716717 DK |
2110 | put_cpu(); |
2111 | } | |
2112 | ||
7faa4ee1 AK |
2113 | #undef F |
2114 | ||
674eea0f | 2115 | static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2 *cpuid, |
19355475 | 2116 | struct kvm_cpuid_entry2 __user *entries) |
07716717 DK |
2117 | { |
2118 | struct kvm_cpuid_entry2 *cpuid_entries; | |
2119 | int limit, nent = 0, r = -E2BIG; | |
2120 | u32 func; | |
2121 | ||
2122 | if (cpuid->nent < 1) | |
2123 | goto out; | |
6a544355 AK |
2124 | if (cpuid->nent > KVM_MAX_CPUID_ENTRIES) |
2125 | cpuid->nent = KVM_MAX_CPUID_ENTRIES; | |
07716717 DK |
2126 | r = -ENOMEM; |
2127 | cpuid_entries = vmalloc(sizeof(struct kvm_cpuid_entry2) * cpuid->nent); | |
2128 | if (!cpuid_entries) | |
2129 | goto out; | |
2130 | ||
2131 | do_cpuid_ent(&cpuid_entries[0], 0, 0, &nent, cpuid->nent); | |
2132 | limit = cpuid_entries[0].eax; | |
2133 | for (func = 1; func <= limit && nent < cpuid->nent; ++func) | |
2134 | do_cpuid_ent(&cpuid_entries[nent], func, 0, | |
19355475 | 2135 | &nent, cpuid->nent); |
07716717 DK |
2136 | r = -E2BIG; |
2137 | if (nent >= cpuid->nent) | |
2138 | goto out_free; | |
2139 | ||
2140 | do_cpuid_ent(&cpuid_entries[nent], 0x80000000, 0, &nent, cpuid->nent); | |
2141 | limit = cpuid_entries[nent - 1].eax; | |
2142 | for (func = 0x80000001; func <= limit && nent < cpuid->nent; ++func) | |
2143 | do_cpuid_ent(&cpuid_entries[nent], func, 0, | |
19355475 | 2144 | &nent, cpuid->nent); |
84478c82 GC |
2145 | |
2146 | ||
2147 | ||
2148 | r = -E2BIG; | |
2149 | if (nent >= cpuid->nent) | |
2150 | goto out_free; | |
2151 | ||
2152 | do_cpuid_ent(&cpuid_entries[nent], KVM_CPUID_SIGNATURE, 0, &nent, | |
2153 | cpuid->nent); | |
2154 | ||
2155 | r = -E2BIG; | |
2156 | if (nent >= cpuid->nent) | |
2157 | goto out_free; | |
2158 | ||
2159 | do_cpuid_ent(&cpuid_entries[nent], KVM_CPUID_FEATURES, 0, &nent, | |
2160 | cpuid->nent); | |
2161 | ||
cb007648 MM |
2162 | r = -E2BIG; |
2163 | if (nent >= cpuid->nent) | |
2164 | goto out_free; | |
2165 | ||
07716717 DK |
2166 | r = -EFAULT; |
2167 | if (copy_to_user(entries, cpuid_entries, | |
19355475 | 2168 | nent * sizeof(struct kvm_cpuid_entry2))) |
07716717 DK |
2169 | goto out_free; |
2170 | cpuid->nent = nent; | |
2171 | r = 0; | |
2172 | ||
2173 | out_free: | |
2174 | vfree(cpuid_entries); | |
2175 | out: | |
2176 | return r; | |
2177 | } | |
2178 | ||
313a3dc7 CO |
2179 | static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu *vcpu, |
2180 | struct kvm_lapic_state *s) | |
2181 | { | |
ad312c7c | 2182 | memcpy(s->regs, vcpu->arch.apic->regs, sizeof *s); |
313a3dc7 CO |
2183 | |
2184 | return 0; | |
2185 | } | |
2186 | ||
2187 | static int kvm_vcpu_ioctl_set_lapic(struct kvm_vcpu *vcpu, | |
2188 | struct kvm_lapic_state *s) | |
2189 | { | |
ad312c7c | 2190 | memcpy(vcpu->arch.apic->regs, s->regs, sizeof *s); |
313a3dc7 | 2191 | kvm_apic_post_state_restore(vcpu); |
cb142eb7 | 2192 | update_cr8_intercept(vcpu); |
313a3dc7 CO |
2193 | |
2194 | return 0; | |
2195 | } | |
2196 | ||
f77bc6a4 ZX |
2197 | static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, |
2198 | struct kvm_interrupt *irq) | |
2199 | { | |
2200 | if (irq->irq < 0 || irq->irq >= 256) | |
2201 | return -EINVAL; | |
2202 | if (irqchip_in_kernel(vcpu->kvm)) | |
2203 | return -ENXIO; | |
f77bc6a4 | 2204 | |
66fd3f7f | 2205 | kvm_queue_interrupt(vcpu, irq->irq, false); |
f77bc6a4 | 2206 | |
f77bc6a4 ZX |
2207 | return 0; |
2208 | } | |
2209 | ||
c4abb7c9 JK |
2210 | static int kvm_vcpu_ioctl_nmi(struct kvm_vcpu *vcpu) |
2211 | { | |
c4abb7c9 | 2212 | kvm_inject_nmi(vcpu); |
c4abb7c9 JK |
2213 | |
2214 | return 0; | |
2215 | } | |
2216 | ||
b209749f AK |
2217 | static int vcpu_ioctl_tpr_access_reporting(struct kvm_vcpu *vcpu, |
2218 | struct kvm_tpr_access_ctl *tac) | |
2219 | { | |
2220 | if (tac->flags) | |
2221 | return -EINVAL; | |
2222 | vcpu->arch.tpr_access_reporting = !!tac->enabled; | |
2223 | return 0; | |
2224 | } | |
2225 | ||
890ca9ae HY |
2226 | static int kvm_vcpu_ioctl_x86_setup_mce(struct kvm_vcpu *vcpu, |
2227 | u64 mcg_cap) | |
2228 | { | |
2229 | int r; | |
2230 | unsigned bank_num = mcg_cap & 0xff, bank; | |
2231 | ||
2232 | r = -EINVAL; | |
a9e38c3e | 2233 | if (!bank_num || bank_num >= KVM_MAX_MCE_BANKS) |
890ca9ae HY |
2234 | goto out; |
2235 | if (mcg_cap & ~(KVM_MCE_CAP_SUPPORTED | 0xff | 0xff0000)) | |
2236 | goto out; | |
2237 | r = 0; | |
2238 | vcpu->arch.mcg_cap = mcg_cap; | |
2239 | /* Init IA32_MCG_CTL to all 1s */ | |
2240 | if (mcg_cap & MCG_CTL_P) | |
2241 | vcpu->arch.mcg_ctl = ~(u64)0; | |
2242 | /* Init IA32_MCi_CTL to all 1s */ | |
2243 | for (bank = 0; bank < bank_num; bank++) | |
2244 | vcpu->arch.mce_banks[bank*4] = ~(u64)0; | |
2245 | out: | |
2246 | return r; | |
2247 | } | |
2248 | ||
2249 | static int kvm_vcpu_ioctl_x86_set_mce(struct kvm_vcpu *vcpu, | |
2250 | struct kvm_x86_mce *mce) | |
2251 | { | |
2252 | u64 mcg_cap = vcpu->arch.mcg_cap; | |
2253 | unsigned bank_num = mcg_cap & 0xff; | |
2254 | u64 *banks = vcpu->arch.mce_banks; | |
2255 | ||
2256 | if (mce->bank >= bank_num || !(mce->status & MCI_STATUS_VAL)) | |
2257 | return -EINVAL; | |
2258 | /* | |
2259 | * if IA32_MCG_CTL is not all 1s, the uncorrected error | |
2260 | * reporting is disabled | |
2261 | */ | |
2262 | if ((mce->status & MCI_STATUS_UC) && (mcg_cap & MCG_CTL_P) && | |
2263 | vcpu->arch.mcg_ctl != ~(u64)0) | |
2264 | return 0; | |
2265 | banks += 4 * mce->bank; | |
2266 | /* | |
2267 | * if IA32_MCi_CTL is not all 1s, the uncorrected error | |
2268 | * reporting is disabled for the bank | |
2269 | */ | |
2270 | if ((mce->status & MCI_STATUS_UC) && banks[0] != ~(u64)0) | |
2271 | return 0; | |
2272 | if (mce->status & MCI_STATUS_UC) { | |
2273 | if ((vcpu->arch.mcg_status & MCG_STATUS_MCIP) || | |
fc78f519 | 2274 | !kvm_read_cr4_bits(vcpu, X86_CR4_MCE)) { |
890ca9ae HY |
2275 | printk(KERN_DEBUG "kvm: set_mce: " |
2276 | "injects mce exception while " | |
2277 | "previous one is in progress!\n"); | |
a8eeb04a | 2278 | kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu); |
890ca9ae HY |
2279 | return 0; |
2280 | } | |
2281 | if (banks[1] & MCI_STATUS_VAL) | |
2282 | mce->status |= MCI_STATUS_OVER; | |
2283 | banks[2] = mce->addr; | |
2284 | banks[3] = mce->misc; | |
2285 | vcpu->arch.mcg_status = mce->mcg_status; | |
2286 | banks[1] = mce->status; | |
2287 | kvm_queue_exception(vcpu, MC_VECTOR); | |
2288 | } else if (!(banks[1] & MCI_STATUS_VAL) | |
2289 | || !(banks[1] & MCI_STATUS_UC)) { | |
2290 | if (banks[1] & MCI_STATUS_VAL) | |
2291 | mce->status |= MCI_STATUS_OVER; | |
2292 | banks[2] = mce->addr; | |
2293 | banks[3] = mce->misc; | |
2294 | banks[1] = mce->status; | |
2295 | } else | |
2296 | banks[1] |= MCI_STATUS_OVER; | |
2297 | return 0; | |
2298 | } | |
2299 | ||
3cfc3092 JK |
2300 | static void kvm_vcpu_ioctl_x86_get_vcpu_events(struct kvm_vcpu *vcpu, |
2301 | struct kvm_vcpu_events *events) | |
2302 | { | |
03b82a30 JK |
2303 | events->exception.injected = |
2304 | vcpu->arch.exception.pending && | |
2305 | !kvm_exception_is_soft(vcpu->arch.exception.nr); | |
3cfc3092 JK |
2306 | events->exception.nr = vcpu->arch.exception.nr; |
2307 | events->exception.has_error_code = vcpu->arch.exception.has_error_code; | |
2308 | events->exception.error_code = vcpu->arch.exception.error_code; | |
2309 | ||
03b82a30 JK |
2310 | events->interrupt.injected = |
2311 | vcpu->arch.interrupt.pending && !vcpu->arch.interrupt.soft; | |
3cfc3092 | 2312 | events->interrupt.nr = vcpu->arch.interrupt.nr; |
03b82a30 | 2313 | events->interrupt.soft = 0; |
48005f64 JK |
2314 | events->interrupt.shadow = |
2315 | kvm_x86_ops->get_interrupt_shadow(vcpu, | |
2316 | KVM_X86_SHADOW_INT_MOV_SS | KVM_X86_SHADOW_INT_STI); | |
3cfc3092 JK |
2317 | |
2318 | events->nmi.injected = vcpu->arch.nmi_injected; | |
2319 | events->nmi.pending = vcpu->arch.nmi_pending; | |
2320 | events->nmi.masked = kvm_x86_ops->get_nmi_mask(vcpu); | |
2321 | ||
2322 | events->sipi_vector = vcpu->arch.sipi_vector; | |
2323 | ||
dab4b911 | 2324 | events->flags = (KVM_VCPUEVENT_VALID_NMI_PENDING |
48005f64 JK |
2325 | | KVM_VCPUEVENT_VALID_SIPI_VECTOR |
2326 | | KVM_VCPUEVENT_VALID_SHADOW); | |
3cfc3092 JK |
2327 | } |
2328 | ||
2329 | static int kvm_vcpu_ioctl_x86_set_vcpu_events(struct kvm_vcpu *vcpu, | |
2330 | struct kvm_vcpu_events *events) | |
2331 | { | |
dab4b911 | 2332 | if (events->flags & ~(KVM_VCPUEVENT_VALID_NMI_PENDING |
48005f64 JK |
2333 | | KVM_VCPUEVENT_VALID_SIPI_VECTOR |
2334 | | KVM_VCPUEVENT_VALID_SHADOW)) | |
3cfc3092 JK |
2335 | return -EINVAL; |
2336 | ||
3cfc3092 JK |
2337 | vcpu->arch.exception.pending = events->exception.injected; |
2338 | vcpu->arch.exception.nr = events->exception.nr; | |
2339 | vcpu->arch.exception.has_error_code = events->exception.has_error_code; | |
2340 | vcpu->arch.exception.error_code = events->exception.error_code; | |
2341 | ||
2342 | vcpu->arch.interrupt.pending = events->interrupt.injected; | |
2343 | vcpu->arch.interrupt.nr = events->interrupt.nr; | |
2344 | vcpu->arch.interrupt.soft = events->interrupt.soft; | |
2345 | if (vcpu->arch.interrupt.pending && irqchip_in_kernel(vcpu->kvm)) | |
2346 | kvm_pic_clear_isr_ack(vcpu->kvm); | |
48005f64 JK |
2347 | if (events->flags & KVM_VCPUEVENT_VALID_SHADOW) |
2348 | kvm_x86_ops->set_interrupt_shadow(vcpu, | |
2349 | events->interrupt.shadow); | |
3cfc3092 JK |
2350 | |
2351 | vcpu->arch.nmi_injected = events->nmi.injected; | |
dab4b911 JK |
2352 | if (events->flags & KVM_VCPUEVENT_VALID_NMI_PENDING) |
2353 | vcpu->arch.nmi_pending = events->nmi.pending; | |
3cfc3092 JK |
2354 | kvm_x86_ops->set_nmi_mask(vcpu, events->nmi.masked); |
2355 | ||
dab4b911 JK |
2356 | if (events->flags & KVM_VCPUEVENT_VALID_SIPI_VECTOR) |
2357 | vcpu->arch.sipi_vector = events->sipi_vector; | |
3cfc3092 | 2358 | |
3cfc3092 JK |
2359 | return 0; |
2360 | } | |
2361 | ||
a1efbe77 JK |
2362 | static void kvm_vcpu_ioctl_x86_get_debugregs(struct kvm_vcpu *vcpu, |
2363 | struct kvm_debugregs *dbgregs) | |
2364 | { | |
a1efbe77 JK |
2365 | memcpy(dbgregs->db, vcpu->arch.db, sizeof(vcpu->arch.db)); |
2366 | dbgregs->dr6 = vcpu->arch.dr6; | |
2367 | dbgregs->dr7 = vcpu->arch.dr7; | |
2368 | dbgregs->flags = 0; | |
a1efbe77 JK |
2369 | } |
2370 | ||
2371 | static int kvm_vcpu_ioctl_x86_set_debugregs(struct kvm_vcpu *vcpu, | |
2372 | struct kvm_debugregs *dbgregs) | |
2373 | { | |
2374 | if (dbgregs->flags) | |
2375 | return -EINVAL; | |
2376 | ||
a1efbe77 JK |
2377 | memcpy(vcpu->arch.db, dbgregs->db, sizeof(vcpu->arch.db)); |
2378 | vcpu->arch.dr6 = dbgregs->dr6; | |
2379 | vcpu->arch.dr7 = dbgregs->dr7; | |
2380 | ||
a1efbe77 JK |
2381 | return 0; |
2382 | } | |
2383 | ||
2d5b5a66 SY |
2384 | static void kvm_vcpu_ioctl_x86_get_xsave(struct kvm_vcpu *vcpu, |
2385 | struct kvm_xsave *guest_xsave) | |
2386 | { | |
2387 | if (cpu_has_xsave) | |
2388 | memcpy(guest_xsave->region, | |
2389 | &vcpu->arch.guest_fpu.state->xsave, | |
2390 | sizeof(struct xsave_struct)); | |
2391 | else { | |
2392 | memcpy(guest_xsave->region, | |
2393 | &vcpu->arch.guest_fpu.state->fxsave, | |
2394 | sizeof(struct i387_fxsave_struct)); | |
2395 | *(u64 *)&guest_xsave->region[XSAVE_HDR_OFFSET / sizeof(u32)] = | |
2396 | XSTATE_FPSSE; | |
2397 | } | |
2398 | } | |
2399 | ||
2400 | static int kvm_vcpu_ioctl_x86_set_xsave(struct kvm_vcpu *vcpu, | |
2401 | struct kvm_xsave *guest_xsave) | |
2402 | { | |
2403 | u64 xstate_bv = | |
2404 | *(u64 *)&guest_xsave->region[XSAVE_HDR_OFFSET / sizeof(u32)]; | |
2405 | ||
2406 | if (cpu_has_xsave) | |
2407 | memcpy(&vcpu->arch.guest_fpu.state->xsave, | |
2408 | guest_xsave->region, sizeof(struct xsave_struct)); | |
2409 | else { | |
2410 | if (xstate_bv & ~XSTATE_FPSSE) | |
2411 | return -EINVAL; | |
2412 | memcpy(&vcpu->arch.guest_fpu.state->fxsave, | |
2413 | guest_xsave->region, sizeof(struct i387_fxsave_struct)); | |
2414 | } | |
2415 | return 0; | |
2416 | } | |
2417 | ||
2418 | static void kvm_vcpu_ioctl_x86_get_xcrs(struct kvm_vcpu *vcpu, | |
2419 | struct kvm_xcrs *guest_xcrs) | |
2420 | { | |
2421 | if (!cpu_has_xsave) { | |
2422 | guest_xcrs->nr_xcrs = 0; | |
2423 | return; | |
2424 | } | |
2425 | ||
2426 | guest_xcrs->nr_xcrs = 1; | |
2427 | guest_xcrs->flags = 0; | |
2428 | guest_xcrs->xcrs[0].xcr = XCR_XFEATURE_ENABLED_MASK; | |
2429 | guest_xcrs->xcrs[0].value = vcpu->arch.xcr0; | |
2430 | } | |
2431 | ||
2432 | static int kvm_vcpu_ioctl_x86_set_xcrs(struct kvm_vcpu *vcpu, | |
2433 | struct kvm_xcrs *guest_xcrs) | |
2434 | { | |
2435 | int i, r = 0; | |
2436 | ||
2437 | if (!cpu_has_xsave) | |
2438 | return -EINVAL; | |
2439 | ||
2440 | if (guest_xcrs->nr_xcrs > KVM_MAX_XCRS || guest_xcrs->flags) | |
2441 | return -EINVAL; | |
2442 | ||
2443 | for (i = 0; i < guest_xcrs->nr_xcrs; i++) | |
2444 | /* Only support XCR0 currently */ | |
2445 | if (guest_xcrs->xcrs[0].xcr == XCR_XFEATURE_ENABLED_MASK) { | |
2446 | r = __kvm_set_xcr(vcpu, XCR_XFEATURE_ENABLED_MASK, | |
2447 | guest_xcrs->xcrs[0].value); | |
2448 | break; | |
2449 | } | |
2450 | if (r) | |
2451 | r = -EINVAL; | |
2452 | return r; | |
2453 | } | |
2454 | ||
313a3dc7 CO |
2455 | long kvm_arch_vcpu_ioctl(struct file *filp, |
2456 | unsigned int ioctl, unsigned long arg) | |
2457 | { | |
2458 | struct kvm_vcpu *vcpu = filp->private_data; | |
2459 | void __user *argp = (void __user *)arg; | |
2460 | int r; | |
d1ac91d8 AK |
2461 | union { |
2462 | struct kvm_lapic_state *lapic; | |
2463 | struct kvm_xsave *xsave; | |
2464 | struct kvm_xcrs *xcrs; | |
2465 | void *buffer; | |
2466 | } u; | |
2467 | ||
2468 | u.buffer = NULL; | |
313a3dc7 CO |
2469 | switch (ioctl) { |
2470 | case KVM_GET_LAPIC: { | |
2204ae3c MT |
2471 | r = -EINVAL; |
2472 | if (!vcpu->arch.apic) | |
2473 | goto out; | |
d1ac91d8 | 2474 | u.lapic = kzalloc(sizeof(struct kvm_lapic_state), GFP_KERNEL); |
313a3dc7 | 2475 | |
b772ff36 | 2476 | r = -ENOMEM; |
d1ac91d8 | 2477 | if (!u.lapic) |
b772ff36 | 2478 | goto out; |
d1ac91d8 | 2479 | r = kvm_vcpu_ioctl_get_lapic(vcpu, u.lapic); |
313a3dc7 CO |
2480 | if (r) |
2481 | goto out; | |
2482 | r = -EFAULT; | |
d1ac91d8 | 2483 | if (copy_to_user(argp, u.lapic, sizeof(struct kvm_lapic_state))) |
313a3dc7 CO |
2484 | goto out; |
2485 | r = 0; | |
2486 | break; | |
2487 | } | |
2488 | case KVM_SET_LAPIC: { | |
2204ae3c MT |
2489 | r = -EINVAL; |
2490 | if (!vcpu->arch.apic) | |
2491 | goto out; | |
d1ac91d8 | 2492 | u.lapic = kmalloc(sizeof(struct kvm_lapic_state), GFP_KERNEL); |
b772ff36 | 2493 | r = -ENOMEM; |
d1ac91d8 | 2494 | if (!u.lapic) |
b772ff36 | 2495 | goto out; |
313a3dc7 | 2496 | r = -EFAULT; |
d1ac91d8 | 2497 | if (copy_from_user(u.lapic, argp, sizeof(struct kvm_lapic_state))) |
313a3dc7 | 2498 | goto out; |
d1ac91d8 | 2499 | r = kvm_vcpu_ioctl_set_lapic(vcpu, u.lapic); |
313a3dc7 CO |
2500 | if (r) |
2501 | goto out; | |
2502 | r = 0; | |
2503 | break; | |
2504 | } | |
f77bc6a4 ZX |
2505 | case KVM_INTERRUPT: { |
2506 | struct kvm_interrupt irq; | |
2507 | ||
2508 | r = -EFAULT; | |
2509 | if (copy_from_user(&irq, argp, sizeof irq)) | |
2510 | goto out; | |
2511 | r = kvm_vcpu_ioctl_interrupt(vcpu, &irq); | |
2512 | if (r) | |
2513 | goto out; | |
2514 | r = 0; | |
2515 | break; | |
2516 | } | |
c4abb7c9 JK |
2517 | case KVM_NMI: { |
2518 | r = kvm_vcpu_ioctl_nmi(vcpu); | |
2519 | if (r) | |
2520 | goto out; | |
2521 | r = 0; | |
2522 | break; | |
2523 | } | |
313a3dc7 CO |
2524 | case KVM_SET_CPUID: { |
2525 | struct kvm_cpuid __user *cpuid_arg = argp; | |
2526 | struct kvm_cpuid cpuid; | |
2527 | ||
2528 | r = -EFAULT; | |
2529 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
2530 | goto out; | |
2531 | r = kvm_vcpu_ioctl_set_cpuid(vcpu, &cpuid, cpuid_arg->entries); | |
2532 | if (r) | |
2533 | goto out; | |
2534 | break; | |
2535 | } | |
07716717 DK |
2536 | case KVM_SET_CPUID2: { |
2537 | struct kvm_cpuid2 __user *cpuid_arg = argp; | |
2538 | struct kvm_cpuid2 cpuid; | |
2539 | ||
2540 | r = -EFAULT; | |
2541 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
2542 | goto out; | |
2543 | r = kvm_vcpu_ioctl_set_cpuid2(vcpu, &cpuid, | |
19355475 | 2544 | cpuid_arg->entries); |
07716717 DK |
2545 | if (r) |
2546 | goto out; | |
2547 | break; | |
2548 | } | |
2549 | case KVM_GET_CPUID2: { | |
2550 | struct kvm_cpuid2 __user *cpuid_arg = argp; | |
2551 | struct kvm_cpuid2 cpuid; | |
2552 | ||
2553 | r = -EFAULT; | |
2554 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
2555 | goto out; | |
2556 | r = kvm_vcpu_ioctl_get_cpuid2(vcpu, &cpuid, | |
19355475 | 2557 | cpuid_arg->entries); |
07716717 DK |
2558 | if (r) |
2559 | goto out; | |
2560 | r = -EFAULT; | |
2561 | if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid)) | |
2562 | goto out; | |
2563 | r = 0; | |
2564 | break; | |
2565 | } | |
313a3dc7 CO |
2566 | case KVM_GET_MSRS: |
2567 | r = msr_io(vcpu, argp, kvm_get_msr, 1); | |
2568 | break; | |
2569 | case KVM_SET_MSRS: | |
2570 | r = msr_io(vcpu, argp, do_set_msr, 0); | |
2571 | break; | |
b209749f AK |
2572 | case KVM_TPR_ACCESS_REPORTING: { |
2573 | struct kvm_tpr_access_ctl tac; | |
2574 | ||
2575 | r = -EFAULT; | |
2576 | if (copy_from_user(&tac, argp, sizeof tac)) | |
2577 | goto out; | |
2578 | r = vcpu_ioctl_tpr_access_reporting(vcpu, &tac); | |
2579 | if (r) | |
2580 | goto out; | |
2581 | r = -EFAULT; | |
2582 | if (copy_to_user(argp, &tac, sizeof tac)) | |
2583 | goto out; | |
2584 | r = 0; | |
2585 | break; | |
2586 | }; | |
b93463aa AK |
2587 | case KVM_SET_VAPIC_ADDR: { |
2588 | struct kvm_vapic_addr va; | |
2589 | ||
2590 | r = -EINVAL; | |
2591 | if (!irqchip_in_kernel(vcpu->kvm)) | |
2592 | goto out; | |
2593 | r = -EFAULT; | |
2594 | if (copy_from_user(&va, argp, sizeof va)) | |
2595 | goto out; | |
2596 | r = 0; | |
2597 | kvm_lapic_set_vapic_addr(vcpu, va.vapic_addr); | |
2598 | break; | |
2599 | } | |
890ca9ae HY |
2600 | case KVM_X86_SETUP_MCE: { |
2601 | u64 mcg_cap; | |
2602 | ||
2603 | r = -EFAULT; | |
2604 | if (copy_from_user(&mcg_cap, argp, sizeof mcg_cap)) | |
2605 | goto out; | |
2606 | r = kvm_vcpu_ioctl_x86_setup_mce(vcpu, mcg_cap); | |
2607 | break; | |
2608 | } | |
2609 | case KVM_X86_SET_MCE: { | |
2610 | struct kvm_x86_mce mce; | |
2611 | ||
2612 | r = -EFAULT; | |
2613 | if (copy_from_user(&mce, argp, sizeof mce)) | |
2614 | goto out; | |
2615 | r = kvm_vcpu_ioctl_x86_set_mce(vcpu, &mce); | |
2616 | break; | |
2617 | } | |
3cfc3092 JK |
2618 | case KVM_GET_VCPU_EVENTS: { |
2619 | struct kvm_vcpu_events events; | |
2620 | ||
2621 | kvm_vcpu_ioctl_x86_get_vcpu_events(vcpu, &events); | |
2622 | ||
2623 | r = -EFAULT; | |
2624 | if (copy_to_user(argp, &events, sizeof(struct kvm_vcpu_events))) | |
2625 | break; | |
2626 | r = 0; | |
2627 | break; | |
2628 | } | |
2629 | case KVM_SET_VCPU_EVENTS: { | |
2630 | struct kvm_vcpu_events events; | |
2631 | ||
2632 | r = -EFAULT; | |
2633 | if (copy_from_user(&events, argp, sizeof(struct kvm_vcpu_events))) | |
2634 | break; | |
2635 | ||
2636 | r = kvm_vcpu_ioctl_x86_set_vcpu_events(vcpu, &events); | |
2637 | break; | |
2638 | } | |
a1efbe77 JK |
2639 | case KVM_GET_DEBUGREGS: { |
2640 | struct kvm_debugregs dbgregs; | |
2641 | ||
2642 | kvm_vcpu_ioctl_x86_get_debugregs(vcpu, &dbgregs); | |
2643 | ||
2644 | r = -EFAULT; | |
2645 | if (copy_to_user(argp, &dbgregs, | |
2646 | sizeof(struct kvm_debugregs))) | |
2647 | break; | |
2648 | r = 0; | |
2649 | break; | |
2650 | } | |
2651 | case KVM_SET_DEBUGREGS: { | |
2652 | struct kvm_debugregs dbgregs; | |
2653 | ||
2654 | r = -EFAULT; | |
2655 | if (copy_from_user(&dbgregs, argp, | |
2656 | sizeof(struct kvm_debugregs))) | |
2657 | break; | |
2658 | ||
2659 | r = kvm_vcpu_ioctl_x86_set_debugregs(vcpu, &dbgregs); | |
2660 | break; | |
2661 | } | |
2d5b5a66 | 2662 | case KVM_GET_XSAVE: { |
d1ac91d8 | 2663 | u.xsave = kzalloc(sizeof(struct kvm_xsave), GFP_KERNEL); |
2d5b5a66 | 2664 | r = -ENOMEM; |
d1ac91d8 | 2665 | if (!u.xsave) |
2d5b5a66 SY |
2666 | break; |
2667 | ||
d1ac91d8 | 2668 | kvm_vcpu_ioctl_x86_get_xsave(vcpu, u.xsave); |
2d5b5a66 SY |
2669 | |
2670 | r = -EFAULT; | |
d1ac91d8 | 2671 | if (copy_to_user(argp, u.xsave, sizeof(struct kvm_xsave))) |
2d5b5a66 SY |
2672 | break; |
2673 | r = 0; | |
2674 | break; | |
2675 | } | |
2676 | case KVM_SET_XSAVE: { | |
d1ac91d8 | 2677 | u.xsave = kzalloc(sizeof(struct kvm_xsave), GFP_KERNEL); |
2d5b5a66 | 2678 | r = -ENOMEM; |
d1ac91d8 | 2679 | if (!u.xsave) |
2d5b5a66 SY |
2680 | break; |
2681 | ||
2682 | r = -EFAULT; | |
d1ac91d8 | 2683 | if (copy_from_user(u.xsave, argp, sizeof(struct kvm_xsave))) |
2d5b5a66 SY |
2684 | break; |
2685 | ||
d1ac91d8 | 2686 | r = kvm_vcpu_ioctl_x86_set_xsave(vcpu, u.xsave); |
2d5b5a66 SY |
2687 | break; |
2688 | } | |
2689 | case KVM_GET_XCRS: { | |
d1ac91d8 | 2690 | u.xcrs = kzalloc(sizeof(struct kvm_xcrs), GFP_KERNEL); |
2d5b5a66 | 2691 | r = -ENOMEM; |
d1ac91d8 | 2692 | if (!u.xcrs) |
2d5b5a66 SY |
2693 | break; |
2694 | ||
d1ac91d8 | 2695 | kvm_vcpu_ioctl_x86_get_xcrs(vcpu, u.xcrs); |
2d5b5a66 SY |
2696 | |
2697 | r = -EFAULT; | |
d1ac91d8 | 2698 | if (copy_to_user(argp, u.xcrs, |
2d5b5a66 SY |
2699 | sizeof(struct kvm_xcrs))) |
2700 | break; | |
2701 | r = 0; | |
2702 | break; | |
2703 | } | |
2704 | case KVM_SET_XCRS: { | |
d1ac91d8 | 2705 | u.xcrs = kzalloc(sizeof(struct kvm_xcrs), GFP_KERNEL); |
2d5b5a66 | 2706 | r = -ENOMEM; |
d1ac91d8 | 2707 | if (!u.xcrs) |
2d5b5a66 SY |
2708 | break; |
2709 | ||
2710 | r = -EFAULT; | |
d1ac91d8 | 2711 | if (copy_from_user(u.xcrs, argp, |
2d5b5a66 SY |
2712 | sizeof(struct kvm_xcrs))) |
2713 | break; | |
2714 | ||
d1ac91d8 | 2715 | r = kvm_vcpu_ioctl_x86_set_xcrs(vcpu, u.xcrs); |
2d5b5a66 SY |
2716 | break; |
2717 | } | |
313a3dc7 CO |
2718 | default: |
2719 | r = -EINVAL; | |
2720 | } | |
2721 | out: | |
d1ac91d8 | 2722 | kfree(u.buffer); |
313a3dc7 CO |
2723 | return r; |
2724 | } | |
2725 | ||
1fe779f8 CO |
2726 | static int kvm_vm_ioctl_set_tss_addr(struct kvm *kvm, unsigned long addr) |
2727 | { | |
2728 | int ret; | |
2729 | ||
2730 | if (addr > (unsigned int)(-3 * PAGE_SIZE)) | |
2731 | return -1; | |
2732 | ret = kvm_x86_ops->set_tss_addr(kvm, addr); | |
2733 | return ret; | |
2734 | } | |
2735 | ||
b927a3ce SY |
2736 | static int kvm_vm_ioctl_set_identity_map_addr(struct kvm *kvm, |
2737 | u64 ident_addr) | |
2738 | { | |
2739 | kvm->arch.ept_identity_map_addr = ident_addr; | |
2740 | return 0; | |
2741 | } | |
2742 | ||
1fe779f8 CO |
2743 | static int kvm_vm_ioctl_set_nr_mmu_pages(struct kvm *kvm, |
2744 | u32 kvm_nr_mmu_pages) | |
2745 | { | |
2746 | if (kvm_nr_mmu_pages < KVM_MIN_ALLOC_MMU_PAGES) | |
2747 | return -EINVAL; | |
2748 | ||
79fac95e | 2749 | mutex_lock(&kvm->slots_lock); |
7c8a83b7 | 2750 | spin_lock(&kvm->mmu_lock); |
1fe779f8 CO |
2751 | |
2752 | kvm_mmu_change_mmu_pages(kvm, kvm_nr_mmu_pages); | |
f05e70ac | 2753 | kvm->arch.n_requested_mmu_pages = kvm_nr_mmu_pages; |
1fe779f8 | 2754 | |
7c8a83b7 | 2755 | spin_unlock(&kvm->mmu_lock); |
79fac95e | 2756 | mutex_unlock(&kvm->slots_lock); |
1fe779f8 CO |
2757 | return 0; |
2758 | } | |
2759 | ||
2760 | static int kvm_vm_ioctl_get_nr_mmu_pages(struct kvm *kvm) | |
2761 | { | |
f05e70ac | 2762 | return kvm->arch.n_alloc_mmu_pages; |
1fe779f8 CO |
2763 | } |
2764 | ||
1fe779f8 CO |
2765 | static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) |
2766 | { | |
2767 | int r; | |
2768 | ||
2769 | r = 0; | |
2770 | switch (chip->chip_id) { | |
2771 | case KVM_IRQCHIP_PIC_MASTER: | |
2772 | memcpy(&chip->chip.pic, | |
2773 | &pic_irqchip(kvm)->pics[0], | |
2774 | sizeof(struct kvm_pic_state)); | |
2775 | break; | |
2776 | case KVM_IRQCHIP_PIC_SLAVE: | |
2777 | memcpy(&chip->chip.pic, | |
2778 | &pic_irqchip(kvm)->pics[1], | |
2779 | sizeof(struct kvm_pic_state)); | |
2780 | break; | |
2781 | case KVM_IRQCHIP_IOAPIC: | |
eba0226b | 2782 | r = kvm_get_ioapic(kvm, &chip->chip.ioapic); |
1fe779f8 CO |
2783 | break; |
2784 | default: | |
2785 | r = -EINVAL; | |
2786 | break; | |
2787 | } | |
2788 | return r; | |
2789 | } | |
2790 | ||
2791 | static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) | |
2792 | { | |
2793 | int r; | |
2794 | ||
2795 | r = 0; | |
2796 | switch (chip->chip_id) { | |
2797 | case KVM_IRQCHIP_PIC_MASTER: | |
fa8273e9 | 2798 | raw_spin_lock(&pic_irqchip(kvm)->lock); |
1fe779f8 CO |
2799 | memcpy(&pic_irqchip(kvm)->pics[0], |
2800 | &chip->chip.pic, | |
2801 | sizeof(struct kvm_pic_state)); | |
fa8273e9 | 2802 | raw_spin_unlock(&pic_irqchip(kvm)->lock); |
1fe779f8 CO |
2803 | break; |
2804 | case KVM_IRQCHIP_PIC_SLAVE: | |
fa8273e9 | 2805 | raw_spin_lock(&pic_irqchip(kvm)->lock); |
1fe779f8 CO |
2806 | memcpy(&pic_irqchip(kvm)->pics[1], |
2807 | &chip->chip.pic, | |
2808 | sizeof(struct kvm_pic_state)); | |
fa8273e9 | 2809 | raw_spin_unlock(&pic_irqchip(kvm)->lock); |
1fe779f8 CO |
2810 | break; |
2811 | case KVM_IRQCHIP_IOAPIC: | |
eba0226b | 2812 | r = kvm_set_ioapic(kvm, &chip->chip.ioapic); |
1fe779f8 CO |
2813 | break; |
2814 | default: | |
2815 | r = -EINVAL; | |
2816 | break; | |
2817 | } | |
2818 | kvm_pic_update_irq(pic_irqchip(kvm)); | |
2819 | return r; | |
2820 | } | |
2821 | ||
e0f63cb9 SY |
2822 | static int kvm_vm_ioctl_get_pit(struct kvm *kvm, struct kvm_pit_state *ps) |
2823 | { | |
2824 | int r = 0; | |
2825 | ||
894a9c55 | 2826 | mutex_lock(&kvm->arch.vpit->pit_state.lock); |
e0f63cb9 | 2827 | memcpy(ps, &kvm->arch.vpit->pit_state, sizeof(struct kvm_pit_state)); |
894a9c55 | 2828 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); |
e0f63cb9 SY |
2829 | return r; |
2830 | } | |
2831 | ||
2832 | static int kvm_vm_ioctl_set_pit(struct kvm *kvm, struct kvm_pit_state *ps) | |
2833 | { | |
2834 | int r = 0; | |
2835 | ||
894a9c55 | 2836 | mutex_lock(&kvm->arch.vpit->pit_state.lock); |
e0f63cb9 | 2837 | memcpy(&kvm->arch.vpit->pit_state, ps, sizeof(struct kvm_pit_state)); |
e9f42757 BK |
2838 | kvm_pit_load_count(kvm, 0, ps->channels[0].count, 0); |
2839 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); | |
2840 | return r; | |
2841 | } | |
2842 | ||
2843 | static int kvm_vm_ioctl_get_pit2(struct kvm *kvm, struct kvm_pit_state2 *ps) | |
2844 | { | |
2845 | int r = 0; | |
2846 | ||
2847 | mutex_lock(&kvm->arch.vpit->pit_state.lock); | |
2848 | memcpy(ps->channels, &kvm->arch.vpit->pit_state.channels, | |
2849 | sizeof(ps->channels)); | |
2850 | ps->flags = kvm->arch.vpit->pit_state.flags; | |
2851 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); | |
2852 | return r; | |
2853 | } | |
2854 | ||
2855 | static int kvm_vm_ioctl_set_pit2(struct kvm *kvm, struct kvm_pit_state2 *ps) | |
2856 | { | |
2857 | int r = 0, start = 0; | |
2858 | u32 prev_legacy, cur_legacy; | |
2859 | mutex_lock(&kvm->arch.vpit->pit_state.lock); | |
2860 | prev_legacy = kvm->arch.vpit->pit_state.flags & KVM_PIT_FLAGS_HPET_LEGACY; | |
2861 | cur_legacy = ps->flags & KVM_PIT_FLAGS_HPET_LEGACY; | |
2862 | if (!prev_legacy && cur_legacy) | |
2863 | start = 1; | |
2864 | memcpy(&kvm->arch.vpit->pit_state.channels, &ps->channels, | |
2865 | sizeof(kvm->arch.vpit->pit_state.channels)); | |
2866 | kvm->arch.vpit->pit_state.flags = ps->flags; | |
2867 | kvm_pit_load_count(kvm, 0, kvm->arch.vpit->pit_state.channels[0].count, start); | |
894a9c55 | 2868 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); |
e0f63cb9 SY |
2869 | return r; |
2870 | } | |
2871 | ||
52d939a0 MT |
2872 | static int kvm_vm_ioctl_reinject(struct kvm *kvm, |
2873 | struct kvm_reinject_control *control) | |
2874 | { | |
2875 | if (!kvm->arch.vpit) | |
2876 | return -ENXIO; | |
894a9c55 | 2877 | mutex_lock(&kvm->arch.vpit->pit_state.lock); |
52d939a0 | 2878 | kvm->arch.vpit->pit_state.pit_timer.reinject = control->pit_reinject; |
894a9c55 | 2879 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); |
52d939a0 MT |
2880 | return 0; |
2881 | } | |
2882 | ||
5bb064dc ZX |
2883 | /* |
2884 | * Get (and clear) the dirty memory log for a memory slot. | |
2885 | */ | |
2886 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, | |
2887 | struct kvm_dirty_log *log) | |
2888 | { | |
87bf6e7d | 2889 | int r, i; |
5bb064dc | 2890 | struct kvm_memory_slot *memslot; |
87bf6e7d | 2891 | unsigned long n; |
b050b015 | 2892 | unsigned long is_dirty = 0; |
5bb064dc | 2893 | |
79fac95e | 2894 | mutex_lock(&kvm->slots_lock); |
5bb064dc | 2895 | |
b050b015 MT |
2896 | r = -EINVAL; |
2897 | if (log->slot >= KVM_MEMORY_SLOTS) | |
2898 | goto out; | |
2899 | ||
2900 | memslot = &kvm->memslots->memslots[log->slot]; | |
2901 | r = -ENOENT; | |
2902 | if (!memslot->dirty_bitmap) | |
2903 | goto out; | |
2904 | ||
87bf6e7d | 2905 | n = kvm_dirty_bitmap_bytes(memslot); |
b050b015 | 2906 | |
b050b015 MT |
2907 | for (i = 0; !is_dirty && i < n/sizeof(long); i++) |
2908 | is_dirty = memslot->dirty_bitmap[i]; | |
5bb064dc ZX |
2909 | |
2910 | /* If nothing is dirty, don't bother messing with page tables. */ | |
2911 | if (is_dirty) { | |
b050b015 | 2912 | struct kvm_memslots *slots, *old_slots; |
914ebccd | 2913 | unsigned long *dirty_bitmap; |
b050b015 | 2914 | |
7c8a83b7 | 2915 | spin_lock(&kvm->mmu_lock); |
5bb064dc | 2916 | kvm_mmu_slot_remove_write_access(kvm, log->slot); |
7c8a83b7 | 2917 | spin_unlock(&kvm->mmu_lock); |
b050b015 | 2918 | |
914ebccd TY |
2919 | r = -ENOMEM; |
2920 | dirty_bitmap = vmalloc(n); | |
2921 | if (!dirty_bitmap) | |
2922 | goto out; | |
2923 | memset(dirty_bitmap, 0, n); | |
b050b015 | 2924 | |
914ebccd TY |
2925 | r = -ENOMEM; |
2926 | slots = kzalloc(sizeof(struct kvm_memslots), GFP_KERNEL); | |
2927 | if (!slots) { | |
2928 | vfree(dirty_bitmap); | |
2929 | goto out; | |
2930 | } | |
b050b015 MT |
2931 | memcpy(slots, kvm->memslots, sizeof(struct kvm_memslots)); |
2932 | slots->memslots[log->slot].dirty_bitmap = dirty_bitmap; | |
2933 | ||
2934 | old_slots = kvm->memslots; | |
2935 | rcu_assign_pointer(kvm->memslots, slots); | |
2936 | synchronize_srcu_expedited(&kvm->srcu); | |
2937 | dirty_bitmap = old_slots->memslots[log->slot].dirty_bitmap; | |
2938 | kfree(old_slots); | |
914ebccd TY |
2939 | |
2940 | r = -EFAULT; | |
2941 | if (copy_to_user(log->dirty_bitmap, dirty_bitmap, n)) { | |
2942 | vfree(dirty_bitmap); | |
2943 | goto out; | |
2944 | } | |
2945 | vfree(dirty_bitmap); | |
2946 | } else { | |
2947 | r = -EFAULT; | |
2948 | if (clear_user(log->dirty_bitmap, n)) | |
2949 | goto out; | |
5bb064dc | 2950 | } |
b050b015 | 2951 | |
5bb064dc ZX |
2952 | r = 0; |
2953 | out: | |
79fac95e | 2954 | mutex_unlock(&kvm->slots_lock); |
5bb064dc ZX |
2955 | return r; |
2956 | } | |
2957 | ||
1fe779f8 CO |
2958 | long kvm_arch_vm_ioctl(struct file *filp, |
2959 | unsigned int ioctl, unsigned long arg) | |
2960 | { | |
2961 | struct kvm *kvm = filp->private_data; | |
2962 | void __user *argp = (void __user *)arg; | |
367e1319 | 2963 | int r = -ENOTTY; |
f0d66275 DH |
2964 | /* |
2965 | * This union makes it completely explicit to gcc-3.x | |
2966 | * that these two variables' stack usage should be | |
2967 | * combined, not added together. | |
2968 | */ | |
2969 | union { | |
2970 | struct kvm_pit_state ps; | |
e9f42757 | 2971 | struct kvm_pit_state2 ps2; |
c5ff41ce | 2972 | struct kvm_pit_config pit_config; |
f0d66275 | 2973 | } u; |
1fe779f8 CO |
2974 | |
2975 | switch (ioctl) { | |
2976 | case KVM_SET_TSS_ADDR: | |
2977 | r = kvm_vm_ioctl_set_tss_addr(kvm, arg); | |
2978 | if (r < 0) | |
2979 | goto out; | |
2980 | break; | |
b927a3ce SY |
2981 | case KVM_SET_IDENTITY_MAP_ADDR: { |
2982 | u64 ident_addr; | |
2983 | ||
2984 | r = -EFAULT; | |
2985 | if (copy_from_user(&ident_addr, argp, sizeof ident_addr)) | |
2986 | goto out; | |
2987 | r = kvm_vm_ioctl_set_identity_map_addr(kvm, ident_addr); | |
2988 | if (r < 0) | |
2989 | goto out; | |
2990 | break; | |
2991 | } | |
1fe779f8 CO |
2992 | case KVM_SET_NR_MMU_PAGES: |
2993 | r = kvm_vm_ioctl_set_nr_mmu_pages(kvm, arg); | |
2994 | if (r) | |
2995 | goto out; | |
2996 | break; | |
2997 | case KVM_GET_NR_MMU_PAGES: | |
2998 | r = kvm_vm_ioctl_get_nr_mmu_pages(kvm); | |
2999 | break; | |
3ddea128 MT |
3000 | case KVM_CREATE_IRQCHIP: { |
3001 | struct kvm_pic *vpic; | |
3002 | ||
3003 | mutex_lock(&kvm->lock); | |
3004 | r = -EEXIST; | |
3005 | if (kvm->arch.vpic) | |
3006 | goto create_irqchip_unlock; | |
1fe779f8 | 3007 | r = -ENOMEM; |
3ddea128 MT |
3008 | vpic = kvm_create_pic(kvm); |
3009 | if (vpic) { | |
1fe779f8 CO |
3010 | r = kvm_ioapic_init(kvm); |
3011 | if (r) { | |
72bb2fcd WY |
3012 | kvm_io_bus_unregister_dev(kvm, KVM_PIO_BUS, |
3013 | &vpic->dev); | |
3ddea128 MT |
3014 | kfree(vpic); |
3015 | goto create_irqchip_unlock; | |
1fe779f8 CO |
3016 | } |
3017 | } else | |
3ddea128 MT |
3018 | goto create_irqchip_unlock; |
3019 | smp_wmb(); | |
3020 | kvm->arch.vpic = vpic; | |
3021 | smp_wmb(); | |
399ec807 AK |
3022 | r = kvm_setup_default_irq_routing(kvm); |
3023 | if (r) { | |
3ddea128 | 3024 | mutex_lock(&kvm->irq_lock); |
72bb2fcd WY |
3025 | kvm_ioapic_destroy(kvm); |
3026 | kvm_destroy_pic(kvm); | |
3ddea128 | 3027 | mutex_unlock(&kvm->irq_lock); |
399ec807 | 3028 | } |
3ddea128 MT |
3029 | create_irqchip_unlock: |
3030 | mutex_unlock(&kvm->lock); | |
1fe779f8 | 3031 | break; |
3ddea128 | 3032 | } |
7837699f | 3033 | case KVM_CREATE_PIT: |
c5ff41ce JK |
3034 | u.pit_config.flags = KVM_PIT_SPEAKER_DUMMY; |
3035 | goto create_pit; | |
3036 | case KVM_CREATE_PIT2: | |
3037 | r = -EFAULT; | |
3038 | if (copy_from_user(&u.pit_config, argp, | |
3039 | sizeof(struct kvm_pit_config))) | |
3040 | goto out; | |
3041 | create_pit: | |
79fac95e | 3042 | mutex_lock(&kvm->slots_lock); |
269e05e4 AK |
3043 | r = -EEXIST; |
3044 | if (kvm->arch.vpit) | |
3045 | goto create_pit_unlock; | |
7837699f | 3046 | r = -ENOMEM; |
c5ff41ce | 3047 | kvm->arch.vpit = kvm_create_pit(kvm, u.pit_config.flags); |
7837699f SY |
3048 | if (kvm->arch.vpit) |
3049 | r = 0; | |
269e05e4 | 3050 | create_pit_unlock: |
79fac95e | 3051 | mutex_unlock(&kvm->slots_lock); |
7837699f | 3052 | break; |
4925663a | 3053 | case KVM_IRQ_LINE_STATUS: |
1fe779f8 CO |
3054 | case KVM_IRQ_LINE: { |
3055 | struct kvm_irq_level irq_event; | |
3056 | ||
3057 | r = -EFAULT; | |
3058 | if (copy_from_user(&irq_event, argp, sizeof irq_event)) | |
3059 | goto out; | |
160d2f6c | 3060 | r = -ENXIO; |
1fe779f8 | 3061 | if (irqchip_in_kernel(kvm)) { |
4925663a | 3062 | __s32 status; |
4925663a GN |
3063 | status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID, |
3064 | irq_event.irq, irq_event.level); | |
4925663a | 3065 | if (ioctl == KVM_IRQ_LINE_STATUS) { |
160d2f6c | 3066 | r = -EFAULT; |
4925663a GN |
3067 | irq_event.status = status; |
3068 | if (copy_to_user(argp, &irq_event, | |
3069 | sizeof irq_event)) | |
3070 | goto out; | |
3071 | } | |
1fe779f8 CO |
3072 | r = 0; |
3073 | } | |
3074 | break; | |
3075 | } | |
3076 | case KVM_GET_IRQCHIP: { | |
3077 | /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ | |
f0d66275 | 3078 | struct kvm_irqchip *chip = kmalloc(sizeof(*chip), GFP_KERNEL); |
1fe779f8 | 3079 | |
f0d66275 DH |
3080 | r = -ENOMEM; |
3081 | if (!chip) | |
1fe779f8 | 3082 | goto out; |
f0d66275 DH |
3083 | r = -EFAULT; |
3084 | if (copy_from_user(chip, argp, sizeof *chip)) | |
3085 | goto get_irqchip_out; | |
1fe779f8 CO |
3086 | r = -ENXIO; |
3087 | if (!irqchip_in_kernel(kvm)) | |
f0d66275 DH |
3088 | goto get_irqchip_out; |
3089 | r = kvm_vm_ioctl_get_irqchip(kvm, chip); | |
1fe779f8 | 3090 | if (r) |
f0d66275 | 3091 | goto get_irqchip_out; |
1fe779f8 | 3092 | r = -EFAULT; |
f0d66275 DH |
3093 | if (copy_to_user(argp, chip, sizeof *chip)) |
3094 | goto get_irqchip_out; | |
1fe779f8 | 3095 | r = 0; |
f0d66275 DH |
3096 | get_irqchip_out: |
3097 | kfree(chip); | |
3098 | if (r) | |
3099 | goto out; | |
1fe779f8 CO |
3100 | break; |
3101 | } | |
3102 | case KVM_SET_IRQCHIP: { | |
3103 | /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ | |
f0d66275 | 3104 | struct kvm_irqchip *chip = kmalloc(sizeof(*chip), GFP_KERNEL); |
1fe779f8 | 3105 | |
f0d66275 DH |
3106 | r = -ENOMEM; |
3107 | if (!chip) | |
1fe779f8 | 3108 | goto out; |
f0d66275 DH |
3109 | r = -EFAULT; |
3110 | if (copy_from_user(chip, argp, sizeof *chip)) | |
3111 | goto set_irqchip_out; | |
1fe779f8 CO |
3112 | r = -ENXIO; |
3113 | if (!irqchip_in_kernel(kvm)) | |
f0d66275 DH |
3114 | goto set_irqchip_out; |
3115 | r = kvm_vm_ioctl_set_irqchip(kvm, chip); | |
1fe779f8 | 3116 | if (r) |
f0d66275 | 3117 | goto set_irqchip_out; |
1fe779f8 | 3118 | r = 0; |
f0d66275 DH |
3119 | set_irqchip_out: |
3120 | kfree(chip); | |
3121 | if (r) | |
3122 | goto out; | |
1fe779f8 CO |
3123 | break; |
3124 | } | |
e0f63cb9 | 3125 | case KVM_GET_PIT: { |
e0f63cb9 | 3126 | r = -EFAULT; |
f0d66275 | 3127 | if (copy_from_user(&u.ps, argp, sizeof(struct kvm_pit_state))) |
e0f63cb9 SY |
3128 | goto out; |
3129 | r = -ENXIO; | |
3130 | if (!kvm->arch.vpit) | |
3131 | goto out; | |
f0d66275 | 3132 | r = kvm_vm_ioctl_get_pit(kvm, &u.ps); |
e0f63cb9 SY |
3133 | if (r) |
3134 | goto out; | |
3135 | r = -EFAULT; | |
f0d66275 | 3136 | if (copy_to_user(argp, &u.ps, sizeof(struct kvm_pit_state))) |
e0f63cb9 SY |
3137 | goto out; |
3138 | r = 0; | |
3139 | break; | |
3140 | } | |
3141 | case KVM_SET_PIT: { | |
e0f63cb9 | 3142 | r = -EFAULT; |
f0d66275 | 3143 | if (copy_from_user(&u.ps, argp, sizeof u.ps)) |
e0f63cb9 SY |
3144 | goto out; |
3145 | r = -ENXIO; | |
3146 | if (!kvm->arch.vpit) | |
3147 | goto out; | |
f0d66275 | 3148 | r = kvm_vm_ioctl_set_pit(kvm, &u.ps); |
e0f63cb9 SY |
3149 | if (r) |
3150 | goto out; | |
3151 | r = 0; | |
3152 | break; | |
3153 | } | |
e9f42757 BK |
3154 | case KVM_GET_PIT2: { |
3155 | r = -ENXIO; | |
3156 | if (!kvm->arch.vpit) | |
3157 | goto out; | |
3158 | r = kvm_vm_ioctl_get_pit2(kvm, &u.ps2); | |
3159 | if (r) | |
3160 | goto out; | |
3161 | r = -EFAULT; | |
3162 | if (copy_to_user(argp, &u.ps2, sizeof(u.ps2))) | |
3163 | goto out; | |
3164 | r = 0; | |
3165 | break; | |
3166 | } | |
3167 | case KVM_SET_PIT2: { | |
3168 | r = -EFAULT; | |
3169 | if (copy_from_user(&u.ps2, argp, sizeof(u.ps2))) | |
3170 | goto out; | |
3171 | r = -ENXIO; | |
3172 | if (!kvm->arch.vpit) | |
3173 | goto out; | |
3174 | r = kvm_vm_ioctl_set_pit2(kvm, &u.ps2); | |
3175 | if (r) | |
3176 | goto out; | |
3177 | r = 0; | |
3178 | break; | |
3179 | } | |
52d939a0 MT |
3180 | case KVM_REINJECT_CONTROL: { |
3181 | struct kvm_reinject_control control; | |
3182 | r = -EFAULT; | |
3183 | if (copy_from_user(&control, argp, sizeof(control))) | |
3184 | goto out; | |
3185 | r = kvm_vm_ioctl_reinject(kvm, &control); | |
3186 | if (r) | |
3187 | goto out; | |
3188 | r = 0; | |
3189 | break; | |
3190 | } | |
ffde22ac ES |
3191 | case KVM_XEN_HVM_CONFIG: { |
3192 | r = -EFAULT; | |
3193 | if (copy_from_user(&kvm->arch.xen_hvm_config, argp, | |
3194 | sizeof(struct kvm_xen_hvm_config))) | |
3195 | goto out; | |
3196 | r = -EINVAL; | |
3197 | if (kvm->arch.xen_hvm_config.flags) | |
3198 | goto out; | |
3199 | r = 0; | |
3200 | break; | |
3201 | } | |
afbcf7ab GC |
3202 | case KVM_SET_CLOCK: { |
3203 | struct timespec now; | |
3204 | struct kvm_clock_data user_ns; | |
3205 | u64 now_ns; | |
3206 | s64 delta; | |
3207 | ||
3208 | r = -EFAULT; | |
3209 | if (copy_from_user(&user_ns, argp, sizeof(user_ns))) | |
3210 | goto out; | |
3211 | ||
3212 | r = -EINVAL; | |
3213 | if (user_ns.flags) | |
3214 | goto out; | |
3215 | ||
3216 | r = 0; | |
3217 | ktime_get_ts(&now); | |
3218 | now_ns = timespec_to_ns(&now); | |
3219 | delta = user_ns.clock - now_ns; | |
3220 | kvm->arch.kvmclock_offset = delta; | |
3221 | break; | |
3222 | } | |
3223 | case KVM_GET_CLOCK: { | |
3224 | struct timespec now; | |
3225 | struct kvm_clock_data user_ns; | |
3226 | u64 now_ns; | |
3227 | ||
3228 | ktime_get_ts(&now); | |
3229 | now_ns = timespec_to_ns(&now); | |
3230 | user_ns.clock = kvm->arch.kvmclock_offset + now_ns; | |
3231 | user_ns.flags = 0; | |
3232 | ||
3233 | r = -EFAULT; | |
3234 | if (copy_to_user(argp, &user_ns, sizeof(user_ns))) | |
3235 | goto out; | |
3236 | r = 0; | |
3237 | break; | |
3238 | } | |
3239 | ||
1fe779f8 CO |
3240 | default: |
3241 | ; | |
3242 | } | |
3243 | out: | |
3244 | return r; | |
3245 | } | |
3246 | ||
a16b043c | 3247 | static void kvm_init_msr_list(void) |
043405e1 CO |
3248 | { |
3249 | u32 dummy[2]; | |
3250 | unsigned i, j; | |
3251 | ||
e3267cbb GC |
3252 | /* skip the first msrs in the list. KVM-specific */ |
3253 | for (i = j = KVM_SAVE_MSRS_BEGIN; i < ARRAY_SIZE(msrs_to_save); i++) { | |
043405e1 CO |
3254 | if (rdmsr_safe(msrs_to_save[i], &dummy[0], &dummy[1]) < 0) |
3255 | continue; | |
3256 | if (j < i) | |
3257 | msrs_to_save[j] = msrs_to_save[i]; | |
3258 | j++; | |
3259 | } | |
3260 | num_msrs_to_save = j; | |
3261 | } | |
3262 | ||
bda9020e MT |
3263 | static int vcpu_mmio_write(struct kvm_vcpu *vcpu, gpa_t addr, int len, |
3264 | const void *v) | |
bbd9b64e | 3265 | { |
bda9020e MT |
3266 | if (vcpu->arch.apic && |
3267 | !kvm_iodevice_write(&vcpu->arch.apic->dev, addr, len, v)) | |
3268 | return 0; | |
bbd9b64e | 3269 | |
e93f8a0f | 3270 | return kvm_io_bus_write(vcpu->kvm, KVM_MMIO_BUS, addr, len, v); |
bbd9b64e CO |
3271 | } |
3272 | ||
bda9020e | 3273 | static int vcpu_mmio_read(struct kvm_vcpu *vcpu, gpa_t addr, int len, void *v) |
bbd9b64e | 3274 | { |
bda9020e MT |
3275 | if (vcpu->arch.apic && |
3276 | !kvm_iodevice_read(&vcpu->arch.apic->dev, addr, len, v)) | |
3277 | return 0; | |
bbd9b64e | 3278 | |
e93f8a0f | 3279 | return kvm_io_bus_read(vcpu->kvm, KVM_MMIO_BUS, addr, len, v); |
bbd9b64e CO |
3280 | } |
3281 | ||
2dafc6c2 GN |
3282 | static void kvm_set_segment(struct kvm_vcpu *vcpu, |
3283 | struct kvm_segment *var, int seg) | |
3284 | { | |
3285 | kvm_x86_ops->set_segment(vcpu, var, seg); | |
3286 | } | |
3287 | ||
3288 | void kvm_get_segment(struct kvm_vcpu *vcpu, | |
3289 | struct kvm_segment *var, int seg) | |
3290 | { | |
3291 | kvm_x86_ops->get_segment(vcpu, var, seg); | |
3292 | } | |
3293 | ||
1871c602 GN |
3294 | gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva, u32 *error) |
3295 | { | |
3296 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
3297 | return vcpu->arch.mmu.gva_to_gpa(vcpu, gva, access, error); | |
3298 | } | |
3299 | ||
3300 | gpa_t kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu *vcpu, gva_t gva, u32 *error) | |
3301 | { | |
3302 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
3303 | access |= PFERR_FETCH_MASK; | |
3304 | return vcpu->arch.mmu.gva_to_gpa(vcpu, gva, access, error); | |
3305 | } | |
3306 | ||
3307 | gpa_t kvm_mmu_gva_to_gpa_write(struct kvm_vcpu *vcpu, gva_t gva, u32 *error) | |
3308 | { | |
3309 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
3310 | access |= PFERR_WRITE_MASK; | |
3311 | return vcpu->arch.mmu.gva_to_gpa(vcpu, gva, access, error); | |
3312 | } | |
3313 | ||
3314 | /* uses this to access any guest's mapped memory without checking CPL */ | |
3315 | gpa_t kvm_mmu_gva_to_gpa_system(struct kvm_vcpu *vcpu, gva_t gva, u32 *error) | |
3316 | { | |
3317 | return vcpu->arch.mmu.gva_to_gpa(vcpu, gva, 0, error); | |
3318 | } | |
3319 | ||
3320 | static int kvm_read_guest_virt_helper(gva_t addr, void *val, unsigned int bytes, | |
3321 | struct kvm_vcpu *vcpu, u32 access, | |
3322 | u32 *error) | |
bbd9b64e CO |
3323 | { |
3324 | void *data = val; | |
10589a46 | 3325 | int r = X86EMUL_CONTINUE; |
bbd9b64e CO |
3326 | |
3327 | while (bytes) { | |
1871c602 | 3328 | gpa_t gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr, access, error); |
bbd9b64e | 3329 | unsigned offset = addr & (PAGE_SIZE-1); |
77c2002e | 3330 | unsigned toread = min(bytes, (unsigned)PAGE_SIZE - offset); |
bbd9b64e CO |
3331 | int ret; |
3332 | ||
10589a46 MT |
3333 | if (gpa == UNMAPPED_GVA) { |
3334 | r = X86EMUL_PROPAGATE_FAULT; | |
3335 | goto out; | |
3336 | } | |
77c2002e | 3337 | ret = kvm_read_guest(vcpu->kvm, gpa, data, toread); |
10589a46 | 3338 | if (ret < 0) { |
c3cd7ffa | 3339 | r = X86EMUL_IO_NEEDED; |
10589a46 MT |
3340 | goto out; |
3341 | } | |
bbd9b64e | 3342 | |
77c2002e IE |
3343 | bytes -= toread; |
3344 | data += toread; | |
3345 | addr += toread; | |
bbd9b64e | 3346 | } |
10589a46 | 3347 | out: |
10589a46 | 3348 | return r; |
bbd9b64e | 3349 | } |
77c2002e | 3350 | |
1871c602 GN |
3351 | /* used for instruction fetching */ |
3352 | static int kvm_fetch_guest_virt(gva_t addr, void *val, unsigned int bytes, | |
3353 | struct kvm_vcpu *vcpu, u32 *error) | |
3354 | { | |
3355 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
3356 | return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, | |
3357 | access | PFERR_FETCH_MASK, error); | |
3358 | } | |
3359 | ||
3360 | static int kvm_read_guest_virt(gva_t addr, void *val, unsigned int bytes, | |
3361 | struct kvm_vcpu *vcpu, u32 *error) | |
3362 | { | |
3363 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
3364 | return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, access, | |
3365 | error); | |
3366 | } | |
3367 | ||
3368 | static int kvm_read_guest_virt_system(gva_t addr, void *val, unsigned int bytes, | |
3369 | struct kvm_vcpu *vcpu, u32 *error) | |
3370 | { | |
3371 | return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, 0, error); | |
3372 | } | |
3373 | ||
7972995b | 3374 | static int kvm_write_guest_virt_system(gva_t addr, void *val, |
2dafc6c2 | 3375 | unsigned int bytes, |
7972995b | 3376 | struct kvm_vcpu *vcpu, |
2dafc6c2 | 3377 | u32 *error) |
77c2002e IE |
3378 | { |
3379 | void *data = val; | |
3380 | int r = X86EMUL_CONTINUE; | |
3381 | ||
3382 | while (bytes) { | |
7972995b GN |
3383 | gpa_t gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr, |
3384 | PFERR_WRITE_MASK, error); | |
77c2002e IE |
3385 | unsigned offset = addr & (PAGE_SIZE-1); |
3386 | unsigned towrite = min(bytes, (unsigned)PAGE_SIZE - offset); | |
3387 | int ret; | |
3388 | ||
3389 | if (gpa == UNMAPPED_GVA) { | |
3390 | r = X86EMUL_PROPAGATE_FAULT; | |
3391 | goto out; | |
3392 | } | |
3393 | ret = kvm_write_guest(vcpu->kvm, gpa, data, towrite); | |
3394 | if (ret < 0) { | |
c3cd7ffa | 3395 | r = X86EMUL_IO_NEEDED; |
77c2002e IE |
3396 | goto out; |
3397 | } | |
3398 | ||
3399 | bytes -= towrite; | |
3400 | data += towrite; | |
3401 | addr += towrite; | |
3402 | } | |
3403 | out: | |
3404 | return r; | |
3405 | } | |
3406 | ||
bbd9b64e CO |
3407 | static int emulator_read_emulated(unsigned long addr, |
3408 | void *val, | |
3409 | unsigned int bytes, | |
8fe681e9 | 3410 | unsigned int *error_code, |
bbd9b64e CO |
3411 | struct kvm_vcpu *vcpu) |
3412 | { | |
bbd9b64e CO |
3413 | gpa_t gpa; |
3414 | ||
3415 | if (vcpu->mmio_read_completed) { | |
3416 | memcpy(val, vcpu->mmio_data, bytes); | |
aec51dc4 AK |
3417 | trace_kvm_mmio(KVM_TRACE_MMIO_READ, bytes, |
3418 | vcpu->mmio_phys_addr, *(u64 *)val); | |
bbd9b64e CO |
3419 | vcpu->mmio_read_completed = 0; |
3420 | return X86EMUL_CONTINUE; | |
3421 | } | |
3422 | ||
8fe681e9 | 3423 | gpa = kvm_mmu_gva_to_gpa_read(vcpu, addr, error_code); |
1871c602 | 3424 | |
8fe681e9 | 3425 | if (gpa == UNMAPPED_GVA) |
1871c602 | 3426 | return X86EMUL_PROPAGATE_FAULT; |
bbd9b64e CO |
3427 | |
3428 | /* For APIC access vmexit */ | |
3429 | if ((gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) | |
3430 | goto mmio; | |
3431 | ||
1871c602 | 3432 | if (kvm_read_guest_virt(addr, val, bytes, vcpu, NULL) |
77c2002e | 3433 | == X86EMUL_CONTINUE) |
bbd9b64e | 3434 | return X86EMUL_CONTINUE; |
bbd9b64e CO |
3435 | |
3436 | mmio: | |
3437 | /* | |
3438 | * Is this MMIO handled locally? | |
3439 | */ | |
aec51dc4 AK |
3440 | if (!vcpu_mmio_read(vcpu, gpa, bytes, val)) { |
3441 | trace_kvm_mmio(KVM_TRACE_MMIO_READ, bytes, gpa, *(u64 *)val); | |
bbd9b64e CO |
3442 | return X86EMUL_CONTINUE; |
3443 | } | |
aec51dc4 AK |
3444 | |
3445 | trace_kvm_mmio(KVM_TRACE_MMIO_READ_UNSATISFIED, bytes, gpa, 0); | |
bbd9b64e CO |
3446 | |
3447 | vcpu->mmio_needed = 1; | |
411c35b7 GN |
3448 | vcpu->run->exit_reason = KVM_EXIT_MMIO; |
3449 | vcpu->run->mmio.phys_addr = vcpu->mmio_phys_addr = gpa; | |
3450 | vcpu->run->mmio.len = vcpu->mmio_size = bytes; | |
3451 | vcpu->run->mmio.is_write = vcpu->mmio_is_write = 0; | |
bbd9b64e | 3452 | |
c3cd7ffa | 3453 | return X86EMUL_IO_NEEDED; |
bbd9b64e CO |
3454 | } |
3455 | ||
3200f405 | 3456 | int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa, |
9f811285 | 3457 | const void *val, int bytes) |
bbd9b64e CO |
3458 | { |
3459 | int ret; | |
3460 | ||
3461 | ret = kvm_write_guest(vcpu->kvm, gpa, val, bytes); | |
9f811285 | 3462 | if (ret < 0) |
bbd9b64e | 3463 | return 0; |
ad218f85 | 3464 | kvm_mmu_pte_write(vcpu, gpa, val, bytes, 1); |
bbd9b64e CO |
3465 | return 1; |
3466 | } | |
3467 | ||
3468 | static int emulator_write_emulated_onepage(unsigned long addr, | |
3469 | const void *val, | |
3470 | unsigned int bytes, | |
8fe681e9 | 3471 | unsigned int *error_code, |
bbd9b64e CO |
3472 | struct kvm_vcpu *vcpu) |
3473 | { | |
10589a46 MT |
3474 | gpa_t gpa; |
3475 | ||
8fe681e9 | 3476 | gpa = kvm_mmu_gva_to_gpa_write(vcpu, addr, error_code); |
bbd9b64e | 3477 | |
8fe681e9 | 3478 | if (gpa == UNMAPPED_GVA) |
bbd9b64e | 3479 | return X86EMUL_PROPAGATE_FAULT; |
bbd9b64e CO |
3480 | |
3481 | /* For APIC access vmexit */ | |
3482 | if ((gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) | |
3483 | goto mmio; | |
3484 | ||
3485 | if (emulator_write_phys(vcpu, gpa, val, bytes)) | |
3486 | return X86EMUL_CONTINUE; | |
3487 | ||
3488 | mmio: | |
aec51dc4 | 3489 | trace_kvm_mmio(KVM_TRACE_MMIO_WRITE, bytes, gpa, *(u64 *)val); |
bbd9b64e CO |
3490 | /* |
3491 | * Is this MMIO handled locally? | |
3492 | */ | |
bda9020e | 3493 | if (!vcpu_mmio_write(vcpu, gpa, bytes, val)) |
bbd9b64e | 3494 | return X86EMUL_CONTINUE; |
bbd9b64e CO |
3495 | |
3496 | vcpu->mmio_needed = 1; | |
411c35b7 GN |
3497 | vcpu->run->exit_reason = KVM_EXIT_MMIO; |
3498 | vcpu->run->mmio.phys_addr = vcpu->mmio_phys_addr = gpa; | |
3499 | vcpu->run->mmio.len = vcpu->mmio_size = bytes; | |
3500 | vcpu->run->mmio.is_write = vcpu->mmio_is_write = 1; | |
3501 | memcpy(vcpu->run->mmio.data, val, bytes); | |
bbd9b64e CO |
3502 | |
3503 | return X86EMUL_CONTINUE; | |
3504 | } | |
3505 | ||
3506 | int emulator_write_emulated(unsigned long addr, | |
8f6abd06 GN |
3507 | const void *val, |
3508 | unsigned int bytes, | |
8fe681e9 | 3509 | unsigned int *error_code, |
8f6abd06 | 3510 | struct kvm_vcpu *vcpu) |
bbd9b64e CO |
3511 | { |
3512 | /* Crossing a page boundary? */ | |
3513 | if (((addr + bytes - 1) ^ addr) & PAGE_MASK) { | |
3514 | int rc, now; | |
3515 | ||
3516 | now = -addr & ~PAGE_MASK; | |
8fe681e9 GN |
3517 | rc = emulator_write_emulated_onepage(addr, val, now, error_code, |
3518 | vcpu); | |
bbd9b64e CO |
3519 | if (rc != X86EMUL_CONTINUE) |
3520 | return rc; | |
3521 | addr += now; | |
3522 | val += now; | |
3523 | bytes -= now; | |
3524 | } | |
8fe681e9 GN |
3525 | return emulator_write_emulated_onepage(addr, val, bytes, error_code, |
3526 | vcpu); | |
bbd9b64e | 3527 | } |
bbd9b64e | 3528 | |
daea3e73 AK |
3529 | #define CMPXCHG_TYPE(t, ptr, old, new) \ |
3530 | (cmpxchg((t *)(ptr), *(t *)(old), *(t *)(new)) == *(t *)(old)) | |
3531 | ||
3532 | #ifdef CONFIG_X86_64 | |
3533 | # define CMPXCHG64(ptr, old, new) CMPXCHG_TYPE(u64, ptr, old, new) | |
3534 | #else | |
3535 | # define CMPXCHG64(ptr, old, new) \ | |
9749a6c0 | 3536 | (cmpxchg64((u64 *)(ptr), *(u64 *)(old), *(u64 *)(new)) == *(u64 *)(old)) |
daea3e73 AK |
3537 | #endif |
3538 | ||
bbd9b64e CO |
3539 | static int emulator_cmpxchg_emulated(unsigned long addr, |
3540 | const void *old, | |
3541 | const void *new, | |
3542 | unsigned int bytes, | |
8fe681e9 | 3543 | unsigned int *error_code, |
bbd9b64e CO |
3544 | struct kvm_vcpu *vcpu) |
3545 | { | |
daea3e73 AK |
3546 | gpa_t gpa; |
3547 | struct page *page; | |
3548 | char *kaddr; | |
3549 | bool exchanged; | |
2bacc55c | 3550 | |
daea3e73 AK |
3551 | /* guests cmpxchg8b have to be emulated atomically */ |
3552 | if (bytes > 8 || (bytes & (bytes - 1))) | |
3553 | goto emul_write; | |
10589a46 | 3554 | |
daea3e73 | 3555 | gpa = kvm_mmu_gva_to_gpa_write(vcpu, addr, NULL); |
2bacc55c | 3556 | |
daea3e73 AK |
3557 | if (gpa == UNMAPPED_GVA || |
3558 | (gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) | |
3559 | goto emul_write; | |
2bacc55c | 3560 | |
daea3e73 AK |
3561 | if (((gpa + bytes - 1) & PAGE_MASK) != (gpa & PAGE_MASK)) |
3562 | goto emul_write; | |
72dc67a6 | 3563 | |
daea3e73 | 3564 | page = gfn_to_page(vcpu->kvm, gpa >> PAGE_SHIFT); |
72dc67a6 | 3565 | |
daea3e73 AK |
3566 | kaddr = kmap_atomic(page, KM_USER0); |
3567 | kaddr += offset_in_page(gpa); | |
3568 | switch (bytes) { | |
3569 | case 1: | |
3570 | exchanged = CMPXCHG_TYPE(u8, kaddr, old, new); | |
3571 | break; | |
3572 | case 2: | |
3573 | exchanged = CMPXCHG_TYPE(u16, kaddr, old, new); | |
3574 | break; | |
3575 | case 4: | |
3576 | exchanged = CMPXCHG_TYPE(u32, kaddr, old, new); | |
3577 | break; | |
3578 | case 8: | |
3579 | exchanged = CMPXCHG64(kaddr, old, new); | |
3580 | break; | |
3581 | default: | |
3582 | BUG(); | |
2bacc55c | 3583 | } |
daea3e73 AK |
3584 | kunmap_atomic(kaddr, KM_USER0); |
3585 | kvm_release_page_dirty(page); | |
3586 | ||
3587 | if (!exchanged) | |
3588 | return X86EMUL_CMPXCHG_FAILED; | |
3589 | ||
8f6abd06 GN |
3590 | kvm_mmu_pte_write(vcpu, gpa, new, bytes, 1); |
3591 | ||
3592 | return X86EMUL_CONTINUE; | |
4a5f48f6 | 3593 | |
3200f405 | 3594 | emul_write: |
daea3e73 | 3595 | printk_once(KERN_WARNING "kvm: emulating exchange as write\n"); |
2bacc55c | 3596 | |
8fe681e9 | 3597 | return emulator_write_emulated(addr, new, bytes, error_code, vcpu); |
bbd9b64e CO |
3598 | } |
3599 | ||
cf8f70bf GN |
3600 | static int kernel_pio(struct kvm_vcpu *vcpu, void *pd) |
3601 | { | |
3602 | /* TODO: String I/O for in kernel device */ | |
3603 | int r; | |
3604 | ||
3605 | if (vcpu->arch.pio.in) | |
3606 | r = kvm_io_bus_read(vcpu->kvm, KVM_PIO_BUS, vcpu->arch.pio.port, | |
3607 | vcpu->arch.pio.size, pd); | |
3608 | else | |
3609 | r = kvm_io_bus_write(vcpu->kvm, KVM_PIO_BUS, | |
3610 | vcpu->arch.pio.port, vcpu->arch.pio.size, | |
3611 | pd); | |
3612 | return r; | |
3613 | } | |
3614 | ||
3615 | ||
3616 | static int emulator_pio_in_emulated(int size, unsigned short port, void *val, | |
3617 | unsigned int count, struct kvm_vcpu *vcpu) | |
3618 | { | |
7972995b | 3619 | if (vcpu->arch.pio.count) |
cf8f70bf GN |
3620 | goto data_avail; |
3621 | ||
3622 | trace_kvm_pio(1, port, size, 1); | |
3623 | ||
3624 | vcpu->arch.pio.port = port; | |
3625 | vcpu->arch.pio.in = 1; | |
7972995b | 3626 | vcpu->arch.pio.count = count; |
cf8f70bf GN |
3627 | vcpu->arch.pio.size = size; |
3628 | ||
3629 | if (!kernel_pio(vcpu, vcpu->arch.pio_data)) { | |
3630 | data_avail: | |
3631 | memcpy(val, vcpu->arch.pio_data, size * count); | |
7972995b | 3632 | vcpu->arch.pio.count = 0; |
cf8f70bf GN |
3633 | return 1; |
3634 | } | |
3635 | ||
3636 | vcpu->run->exit_reason = KVM_EXIT_IO; | |
3637 | vcpu->run->io.direction = KVM_EXIT_IO_IN; | |
3638 | vcpu->run->io.size = size; | |
3639 | vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE; | |
3640 | vcpu->run->io.count = count; | |
3641 | vcpu->run->io.port = port; | |
3642 | ||
3643 | return 0; | |
3644 | } | |
3645 | ||
3646 | static int emulator_pio_out_emulated(int size, unsigned short port, | |
3647 | const void *val, unsigned int count, | |
3648 | struct kvm_vcpu *vcpu) | |
3649 | { | |
3650 | trace_kvm_pio(0, port, size, 1); | |
3651 | ||
3652 | vcpu->arch.pio.port = port; | |
3653 | vcpu->arch.pio.in = 0; | |
7972995b | 3654 | vcpu->arch.pio.count = count; |
cf8f70bf GN |
3655 | vcpu->arch.pio.size = size; |
3656 | ||
3657 | memcpy(vcpu->arch.pio_data, val, size * count); | |
3658 | ||
3659 | if (!kernel_pio(vcpu, vcpu->arch.pio_data)) { | |
7972995b | 3660 | vcpu->arch.pio.count = 0; |
cf8f70bf GN |
3661 | return 1; |
3662 | } | |
3663 | ||
3664 | vcpu->run->exit_reason = KVM_EXIT_IO; | |
3665 | vcpu->run->io.direction = KVM_EXIT_IO_OUT; | |
3666 | vcpu->run->io.size = size; | |
3667 | vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE; | |
3668 | vcpu->run->io.count = count; | |
3669 | vcpu->run->io.port = port; | |
3670 | ||
3671 | return 0; | |
3672 | } | |
3673 | ||
bbd9b64e CO |
3674 | static unsigned long get_segment_base(struct kvm_vcpu *vcpu, int seg) |
3675 | { | |
3676 | return kvm_x86_ops->get_segment_base(vcpu, seg); | |
3677 | } | |
3678 | ||
3679 | int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address) | |
3680 | { | |
a7052897 | 3681 | kvm_mmu_invlpg(vcpu, address); |
bbd9b64e CO |
3682 | return X86EMUL_CONTINUE; |
3683 | } | |
3684 | ||
f5f48ee1 SY |
3685 | int kvm_emulate_wbinvd(struct kvm_vcpu *vcpu) |
3686 | { | |
3687 | if (!need_emulate_wbinvd(vcpu)) | |
3688 | return X86EMUL_CONTINUE; | |
3689 | ||
3690 | if (kvm_x86_ops->has_wbinvd_exit()) { | |
3691 | smp_call_function_many(vcpu->arch.wbinvd_dirty_mask, | |
3692 | wbinvd_ipi, NULL, 1); | |
3693 | cpumask_clear(vcpu->arch.wbinvd_dirty_mask); | |
3694 | } | |
3695 | wbinvd(); | |
3696 | return X86EMUL_CONTINUE; | |
3697 | } | |
3698 | EXPORT_SYMBOL_GPL(kvm_emulate_wbinvd); | |
3699 | ||
bbd9b64e CO |
3700 | int emulate_clts(struct kvm_vcpu *vcpu) |
3701 | { | |
4d4ec087 | 3702 | kvm_x86_ops->set_cr0(vcpu, kvm_read_cr0_bits(vcpu, ~X86_CR0_TS)); |
6b52d186 | 3703 | kvm_x86_ops->fpu_activate(vcpu); |
bbd9b64e CO |
3704 | return X86EMUL_CONTINUE; |
3705 | } | |
3706 | ||
35aa5375 | 3707 | int emulator_get_dr(int dr, unsigned long *dest, struct kvm_vcpu *vcpu) |
bbd9b64e | 3708 | { |
338dbc97 | 3709 | return _kvm_get_dr(vcpu, dr, dest); |
bbd9b64e CO |
3710 | } |
3711 | ||
35aa5375 | 3712 | int emulator_set_dr(int dr, unsigned long value, struct kvm_vcpu *vcpu) |
bbd9b64e | 3713 | { |
338dbc97 GN |
3714 | |
3715 | return __kvm_set_dr(vcpu, dr, value); | |
bbd9b64e CO |
3716 | } |
3717 | ||
52a46617 | 3718 | static u64 mk_cr_64(u64 curr_cr, u32 new_val) |
5fdbf976 | 3719 | { |
52a46617 | 3720 | return (curr_cr & ~((1ULL << 32) - 1)) | new_val; |
5fdbf976 MT |
3721 | } |
3722 | ||
52a46617 | 3723 | static unsigned long emulator_get_cr(int cr, struct kvm_vcpu *vcpu) |
bbd9b64e | 3724 | { |
52a46617 GN |
3725 | unsigned long value; |
3726 | ||
3727 | switch (cr) { | |
3728 | case 0: | |
3729 | value = kvm_read_cr0(vcpu); | |
3730 | break; | |
3731 | case 2: | |
3732 | value = vcpu->arch.cr2; | |
3733 | break; | |
3734 | case 3: | |
3735 | value = vcpu->arch.cr3; | |
3736 | break; | |
3737 | case 4: | |
3738 | value = kvm_read_cr4(vcpu); | |
3739 | break; | |
3740 | case 8: | |
3741 | value = kvm_get_cr8(vcpu); | |
3742 | break; | |
3743 | default: | |
3744 | vcpu_printf(vcpu, "%s: unexpected cr %u\n", __func__, cr); | |
3745 | return 0; | |
3746 | } | |
3747 | ||
3748 | return value; | |
3749 | } | |
3750 | ||
0f12244f | 3751 | static int emulator_set_cr(int cr, unsigned long val, struct kvm_vcpu *vcpu) |
52a46617 | 3752 | { |
0f12244f GN |
3753 | int res = 0; |
3754 | ||
52a46617 GN |
3755 | switch (cr) { |
3756 | case 0: | |
49a9b07e | 3757 | res = kvm_set_cr0(vcpu, mk_cr_64(kvm_read_cr0(vcpu), val)); |
52a46617 GN |
3758 | break; |
3759 | case 2: | |
3760 | vcpu->arch.cr2 = val; | |
3761 | break; | |
3762 | case 3: | |
2390218b | 3763 | res = kvm_set_cr3(vcpu, val); |
52a46617 GN |
3764 | break; |
3765 | case 4: | |
a83b29c6 | 3766 | res = kvm_set_cr4(vcpu, mk_cr_64(kvm_read_cr4(vcpu), val)); |
52a46617 GN |
3767 | break; |
3768 | case 8: | |
0f12244f | 3769 | res = __kvm_set_cr8(vcpu, val & 0xfUL); |
52a46617 GN |
3770 | break; |
3771 | default: | |
3772 | vcpu_printf(vcpu, "%s: unexpected cr %u\n", __func__, cr); | |
0f12244f | 3773 | res = -1; |
52a46617 | 3774 | } |
0f12244f GN |
3775 | |
3776 | return res; | |
52a46617 GN |
3777 | } |
3778 | ||
9c537244 GN |
3779 | static int emulator_get_cpl(struct kvm_vcpu *vcpu) |
3780 | { | |
3781 | return kvm_x86_ops->get_cpl(vcpu); | |
3782 | } | |
3783 | ||
2dafc6c2 GN |
3784 | static void emulator_get_gdt(struct desc_ptr *dt, struct kvm_vcpu *vcpu) |
3785 | { | |
3786 | kvm_x86_ops->get_gdt(vcpu, dt); | |
3787 | } | |
3788 | ||
5951c442 GN |
3789 | static unsigned long emulator_get_cached_segment_base(int seg, |
3790 | struct kvm_vcpu *vcpu) | |
3791 | { | |
3792 | return get_segment_base(vcpu, seg); | |
3793 | } | |
3794 | ||
2dafc6c2 GN |
3795 | static bool emulator_get_cached_descriptor(struct desc_struct *desc, int seg, |
3796 | struct kvm_vcpu *vcpu) | |
3797 | { | |
3798 | struct kvm_segment var; | |
3799 | ||
3800 | kvm_get_segment(vcpu, &var, seg); | |
3801 | ||
3802 | if (var.unusable) | |
3803 | return false; | |
3804 | ||
3805 | if (var.g) | |
3806 | var.limit >>= 12; | |
3807 | set_desc_limit(desc, var.limit); | |
3808 | set_desc_base(desc, (unsigned long)var.base); | |
3809 | desc->type = var.type; | |
3810 | desc->s = var.s; | |
3811 | desc->dpl = var.dpl; | |
3812 | desc->p = var.present; | |
3813 | desc->avl = var.avl; | |
3814 | desc->l = var.l; | |
3815 | desc->d = var.db; | |
3816 | desc->g = var.g; | |
3817 | ||
3818 | return true; | |
3819 | } | |
3820 | ||
3821 | static void emulator_set_cached_descriptor(struct desc_struct *desc, int seg, | |
3822 | struct kvm_vcpu *vcpu) | |
3823 | { | |
3824 | struct kvm_segment var; | |
3825 | ||
3826 | /* needed to preserve selector */ | |
3827 | kvm_get_segment(vcpu, &var, seg); | |
3828 | ||
3829 | var.base = get_desc_base(desc); | |
3830 | var.limit = get_desc_limit(desc); | |
3831 | if (desc->g) | |
3832 | var.limit = (var.limit << 12) | 0xfff; | |
3833 | var.type = desc->type; | |
3834 | var.present = desc->p; | |
3835 | var.dpl = desc->dpl; | |
3836 | var.db = desc->d; | |
3837 | var.s = desc->s; | |
3838 | var.l = desc->l; | |
3839 | var.g = desc->g; | |
3840 | var.avl = desc->avl; | |
3841 | var.present = desc->p; | |
3842 | var.unusable = !var.present; | |
3843 | var.padding = 0; | |
3844 | ||
3845 | kvm_set_segment(vcpu, &var, seg); | |
3846 | return; | |
3847 | } | |
3848 | ||
3849 | static u16 emulator_get_segment_selector(int seg, struct kvm_vcpu *vcpu) | |
3850 | { | |
3851 | struct kvm_segment kvm_seg; | |
3852 | ||
3853 | kvm_get_segment(vcpu, &kvm_seg, seg); | |
3854 | return kvm_seg.selector; | |
3855 | } | |
3856 | ||
3857 | static void emulator_set_segment_selector(u16 sel, int seg, | |
3858 | struct kvm_vcpu *vcpu) | |
3859 | { | |
3860 | struct kvm_segment kvm_seg; | |
3861 | ||
3862 | kvm_get_segment(vcpu, &kvm_seg, seg); | |
3863 | kvm_seg.selector = sel; | |
3864 | kvm_set_segment(vcpu, &kvm_seg, seg); | |
3865 | } | |
3866 | ||
14af3f3c | 3867 | static struct x86_emulate_ops emulate_ops = { |
1871c602 | 3868 | .read_std = kvm_read_guest_virt_system, |
2dafc6c2 | 3869 | .write_std = kvm_write_guest_virt_system, |
1871c602 | 3870 | .fetch = kvm_fetch_guest_virt, |
bbd9b64e CO |
3871 | .read_emulated = emulator_read_emulated, |
3872 | .write_emulated = emulator_write_emulated, | |
3873 | .cmpxchg_emulated = emulator_cmpxchg_emulated, | |
cf8f70bf GN |
3874 | .pio_in_emulated = emulator_pio_in_emulated, |
3875 | .pio_out_emulated = emulator_pio_out_emulated, | |
2dafc6c2 GN |
3876 | .get_cached_descriptor = emulator_get_cached_descriptor, |
3877 | .set_cached_descriptor = emulator_set_cached_descriptor, | |
3878 | .get_segment_selector = emulator_get_segment_selector, | |
3879 | .set_segment_selector = emulator_set_segment_selector, | |
5951c442 | 3880 | .get_cached_segment_base = emulator_get_cached_segment_base, |
2dafc6c2 | 3881 | .get_gdt = emulator_get_gdt, |
52a46617 GN |
3882 | .get_cr = emulator_get_cr, |
3883 | .set_cr = emulator_set_cr, | |
9c537244 | 3884 | .cpl = emulator_get_cpl, |
35aa5375 GN |
3885 | .get_dr = emulator_get_dr, |
3886 | .set_dr = emulator_set_dr, | |
3fb1b5db GN |
3887 | .set_msr = kvm_set_msr, |
3888 | .get_msr = kvm_get_msr, | |
bbd9b64e CO |
3889 | }; |
3890 | ||
5fdbf976 MT |
3891 | static void cache_all_regs(struct kvm_vcpu *vcpu) |
3892 | { | |
3893 | kvm_register_read(vcpu, VCPU_REGS_RAX); | |
3894 | kvm_register_read(vcpu, VCPU_REGS_RSP); | |
3895 | kvm_register_read(vcpu, VCPU_REGS_RIP); | |
3896 | vcpu->arch.regs_dirty = ~0; | |
3897 | } | |
3898 | ||
95cb2295 GN |
3899 | static void toggle_interruptibility(struct kvm_vcpu *vcpu, u32 mask) |
3900 | { | |
3901 | u32 int_shadow = kvm_x86_ops->get_interrupt_shadow(vcpu, mask); | |
3902 | /* | |
3903 | * an sti; sti; sequence only disable interrupts for the first | |
3904 | * instruction. So, if the last instruction, be it emulated or | |
3905 | * not, left the system with the INT_STI flag enabled, it | |
3906 | * means that the last instruction is an sti. We should not | |
3907 | * leave the flag on in this case. The same goes for mov ss | |
3908 | */ | |
3909 | if (!(int_shadow & mask)) | |
3910 | kvm_x86_ops->set_interrupt_shadow(vcpu, mask); | |
3911 | } | |
3912 | ||
54b8486f GN |
3913 | static void inject_emulated_exception(struct kvm_vcpu *vcpu) |
3914 | { | |
3915 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; | |
3916 | if (ctxt->exception == PF_VECTOR) | |
3917 | kvm_inject_page_fault(vcpu, ctxt->cr2, ctxt->error_code); | |
3918 | else if (ctxt->error_code_valid) | |
3919 | kvm_queue_exception_e(vcpu, ctxt->exception, ctxt->error_code); | |
3920 | else | |
3921 | kvm_queue_exception(vcpu, ctxt->exception); | |
3922 | } | |
3923 | ||
6d77dbfc GN |
3924 | static int handle_emulation_failure(struct kvm_vcpu *vcpu) |
3925 | { | |
6d77dbfc GN |
3926 | ++vcpu->stat.insn_emulation_fail; |
3927 | trace_kvm_emulate_insn_failed(vcpu); | |
3928 | vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR; | |
3929 | vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION; | |
3930 | vcpu->run->internal.ndata = 0; | |
3931 | kvm_queue_exception(vcpu, UD_VECTOR); | |
3932 | return EMULATE_FAIL; | |
3933 | } | |
3934 | ||
a6f177ef GN |
3935 | static bool reexecute_instruction(struct kvm_vcpu *vcpu, gva_t gva) |
3936 | { | |
3937 | gpa_t gpa; | |
3938 | ||
68be0803 GN |
3939 | if (tdp_enabled) |
3940 | return false; | |
3941 | ||
a6f177ef GN |
3942 | /* |
3943 | * if emulation was due to access to shadowed page table | |
3944 | * and it failed try to unshadow page and re-entetr the | |
3945 | * guest to let CPU execute the instruction. | |
3946 | */ | |
3947 | if (kvm_mmu_unprotect_page_virt(vcpu, gva)) | |
3948 | return true; | |
3949 | ||
3950 | gpa = kvm_mmu_gva_to_gpa_system(vcpu, gva, NULL); | |
3951 | ||
3952 | if (gpa == UNMAPPED_GVA) | |
3953 | return true; /* let cpu generate fault */ | |
3954 | ||
3955 | if (!kvm_is_error_hva(gfn_to_hva(vcpu->kvm, gpa >> PAGE_SHIFT))) | |
3956 | return true; | |
3957 | ||
3958 | return false; | |
3959 | } | |
3960 | ||
bbd9b64e | 3961 | int emulate_instruction(struct kvm_vcpu *vcpu, |
bbd9b64e CO |
3962 | unsigned long cr2, |
3963 | u16 error_code, | |
571008da | 3964 | int emulation_type) |
bbd9b64e | 3965 | { |
95cb2295 | 3966 | int r; |
4d2179e1 | 3967 | struct decode_cache *c = &vcpu->arch.emulate_ctxt.decode; |
bbd9b64e | 3968 | |
26eef70c | 3969 | kvm_clear_exception_queue(vcpu); |
ad312c7c | 3970 | vcpu->arch.mmio_fault_cr2 = cr2; |
5fdbf976 | 3971 | /* |
56e82318 | 3972 | * TODO: fix emulate.c to use guest_read/write_register |
5fdbf976 MT |
3973 | * instead of direct ->regs accesses, can save hundred cycles |
3974 | * on Intel for instructions that don't read/change RSP, for | |
3975 | * for example. | |
3976 | */ | |
3977 | cache_all_regs(vcpu); | |
bbd9b64e | 3978 | |
571008da | 3979 | if (!(emulation_type & EMULTYPE_NO_DECODE)) { |
bbd9b64e CO |
3980 | int cs_db, cs_l; |
3981 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); | |
3982 | ||
ad312c7c | 3983 | vcpu->arch.emulate_ctxt.vcpu = vcpu; |
83bf0002 | 3984 | vcpu->arch.emulate_ctxt.eflags = kvm_x86_ops->get_rflags(vcpu); |
063db061 | 3985 | vcpu->arch.emulate_ctxt.eip = kvm_rip_read(vcpu); |
ad312c7c | 3986 | vcpu->arch.emulate_ctxt.mode = |
a0044755 | 3987 | (!is_protmode(vcpu)) ? X86EMUL_MODE_REAL : |
ad312c7c | 3988 | (vcpu->arch.emulate_ctxt.eflags & X86_EFLAGS_VM) |
a0044755 | 3989 | ? X86EMUL_MODE_VM86 : cs_l |
bbd9b64e CO |
3990 | ? X86EMUL_MODE_PROT64 : cs_db |
3991 | ? X86EMUL_MODE_PROT32 : X86EMUL_MODE_PROT16; | |
4d2179e1 GN |
3992 | memset(c, 0, sizeof(struct decode_cache)); |
3993 | memcpy(c->regs, vcpu->arch.regs, sizeof c->regs); | |
95cb2295 | 3994 | vcpu->arch.emulate_ctxt.interruptibility = 0; |
54b8486f | 3995 | vcpu->arch.emulate_ctxt.exception = -1; |
bbd9b64e | 3996 | |
ad312c7c | 3997 | r = x86_decode_insn(&vcpu->arch.emulate_ctxt, &emulate_ops); |
e46479f8 | 3998 | trace_kvm_emulate_insn_start(vcpu); |
571008da | 3999 | |
0cb5762e AP |
4000 | /* Only allow emulation of specific instructions on #UD |
4001 | * (namely VMMCALL, sysenter, sysexit, syscall)*/ | |
0cb5762e AP |
4002 | if (emulation_type & EMULTYPE_TRAP_UD) { |
4003 | if (!c->twobyte) | |
4004 | return EMULATE_FAIL; | |
4005 | switch (c->b) { | |
4006 | case 0x01: /* VMMCALL */ | |
4007 | if (c->modrm_mod != 3 || c->modrm_rm != 1) | |
4008 | return EMULATE_FAIL; | |
4009 | break; | |
4010 | case 0x34: /* sysenter */ | |
4011 | case 0x35: /* sysexit */ | |
4012 | if (c->modrm_mod != 0 || c->modrm_rm != 0) | |
4013 | return EMULATE_FAIL; | |
4014 | break; | |
4015 | case 0x05: /* syscall */ | |
4016 | if (c->modrm_mod != 0 || c->modrm_rm != 0) | |
4017 | return EMULATE_FAIL; | |
4018 | break; | |
4019 | default: | |
4020 | return EMULATE_FAIL; | |
4021 | } | |
4022 | ||
4023 | if (!(c->modrm_reg == 0 || c->modrm_reg == 3)) | |
4024 | return EMULATE_FAIL; | |
4025 | } | |
571008da | 4026 | |
f2b5756b | 4027 | ++vcpu->stat.insn_emulation; |
bbd9b64e | 4028 | if (r) { |
a6f177ef | 4029 | if (reexecute_instruction(vcpu, cr2)) |
bbd9b64e | 4030 | return EMULATE_DONE; |
6d77dbfc GN |
4031 | if (emulation_type & EMULTYPE_SKIP) |
4032 | return EMULATE_FAIL; | |
4033 | return handle_emulation_failure(vcpu); | |
bbd9b64e CO |
4034 | } |
4035 | } | |
4036 | ||
ba8afb6b GN |
4037 | if (emulation_type & EMULTYPE_SKIP) { |
4038 | kvm_rip_write(vcpu, vcpu->arch.emulate_ctxt.decode.eip); | |
4039 | return EMULATE_DONE; | |
4040 | } | |
4041 | ||
4d2179e1 GN |
4042 | /* this is needed for vmware backdor interface to work since it |
4043 | changes registers values during IO operation */ | |
4044 | memcpy(c->regs, vcpu->arch.regs, sizeof c->regs); | |
4045 | ||
5cd21917 | 4046 | restart: |
ad312c7c | 4047 | r = x86_emulate_insn(&vcpu->arch.emulate_ctxt, &emulate_ops); |
bbd9b64e | 4048 | |
c3cd7ffa | 4049 | if (r) { /* emulation failed */ |
a6f177ef | 4050 | if (reexecute_instruction(vcpu, cr2)) |
c3cd7ffa GN |
4051 | return EMULATE_DONE; |
4052 | ||
6d77dbfc | 4053 | return handle_emulation_failure(vcpu); |
bbd9b64e CO |
4054 | } |
4055 | ||
95cb2295 | 4056 | toggle_interruptibility(vcpu, vcpu->arch.emulate_ctxt.interruptibility); |
ef050dc0 | 4057 | kvm_x86_ops->set_rflags(vcpu, vcpu->arch.emulate_ctxt.eflags); |
4d2179e1 | 4058 | memcpy(vcpu->arch.regs, c->regs, sizeof c->regs); |
95c55886 | 4059 | kvm_rip_write(vcpu, vcpu->arch.emulate_ctxt.eip); |
3457e419 | 4060 | |
54b8486f GN |
4061 | if (vcpu->arch.emulate_ctxt.exception >= 0) { |
4062 | inject_emulated_exception(vcpu); | |
4063 | return EMULATE_DONE; | |
4064 | } | |
4065 | ||
3457e419 GN |
4066 | if (vcpu->arch.pio.count) { |
4067 | if (!vcpu->arch.pio.in) | |
4068 | vcpu->arch.pio.count = 0; | |
4069 | return EMULATE_DO_MMIO; | |
4070 | } | |
4071 | ||
4072 | if (vcpu->mmio_needed) { | |
4073 | if (vcpu->mmio_is_write) | |
4074 | vcpu->mmio_needed = 0; | |
4075 | return EMULATE_DO_MMIO; | |
4076 | } | |
4077 | ||
5cd21917 GN |
4078 | if (vcpu->arch.emulate_ctxt.restart) |
4079 | goto restart; | |
f850e2e6 | 4080 | |
bbd9b64e | 4081 | return EMULATE_DONE; |
de7d789a | 4082 | } |
bbd9b64e | 4083 | EXPORT_SYMBOL_GPL(emulate_instruction); |
de7d789a | 4084 | |
cf8f70bf | 4085 | int kvm_fast_pio_out(struct kvm_vcpu *vcpu, int size, unsigned short port) |
de7d789a | 4086 | { |
cf8f70bf GN |
4087 | unsigned long val = kvm_register_read(vcpu, VCPU_REGS_RAX); |
4088 | int ret = emulator_pio_out_emulated(size, port, &val, 1, vcpu); | |
4089 | /* do not return to emulator after return from userspace */ | |
7972995b | 4090 | vcpu->arch.pio.count = 0; |
de7d789a CO |
4091 | return ret; |
4092 | } | |
cf8f70bf | 4093 | EXPORT_SYMBOL_GPL(kvm_fast_pio_out); |
de7d789a | 4094 | |
c8076604 GH |
4095 | static void bounce_off(void *info) |
4096 | { | |
4097 | /* nothing */ | |
4098 | } | |
4099 | ||
c8076604 GH |
4100 | static int kvmclock_cpufreq_notifier(struct notifier_block *nb, unsigned long val, |
4101 | void *data) | |
4102 | { | |
4103 | struct cpufreq_freqs *freq = data; | |
4104 | struct kvm *kvm; | |
4105 | struct kvm_vcpu *vcpu; | |
4106 | int i, send_ipi = 0; | |
4107 | ||
c8076604 GH |
4108 | if (val == CPUFREQ_PRECHANGE && freq->old > freq->new) |
4109 | return 0; | |
4110 | if (val == CPUFREQ_POSTCHANGE && freq->old < freq->new) | |
4111 | return 0; | |
0cca7907 | 4112 | per_cpu(cpu_tsc_khz, freq->cpu) = freq->new; |
c8076604 GH |
4113 | |
4114 | spin_lock(&kvm_lock); | |
4115 | list_for_each_entry(kvm, &vm_list, vm_list) { | |
988a2cae | 4116 | kvm_for_each_vcpu(i, vcpu, kvm) { |
c8076604 GH |
4117 | if (vcpu->cpu != freq->cpu) |
4118 | continue; | |
4119 | if (!kvm_request_guest_time_update(vcpu)) | |
4120 | continue; | |
4121 | if (vcpu->cpu != smp_processor_id()) | |
4122 | send_ipi++; | |
4123 | } | |
4124 | } | |
4125 | spin_unlock(&kvm_lock); | |
4126 | ||
4127 | if (freq->old < freq->new && send_ipi) { | |
4128 | /* | |
4129 | * We upscale the frequency. Must make the guest | |
4130 | * doesn't see old kvmclock values while running with | |
4131 | * the new frequency, otherwise we risk the guest sees | |
4132 | * time go backwards. | |
4133 | * | |
4134 | * In case we update the frequency for another cpu | |
4135 | * (which might be in guest context) send an interrupt | |
4136 | * to kick the cpu out of guest context. Next time | |
4137 | * guest context is entered kvmclock will be updated, | |
4138 | * so the guest will not see stale values. | |
4139 | */ | |
4140 | smp_call_function_single(freq->cpu, bounce_off, NULL, 1); | |
4141 | } | |
4142 | return 0; | |
4143 | } | |
4144 | ||
4145 | static struct notifier_block kvmclock_cpufreq_notifier_block = { | |
4146 | .notifier_call = kvmclock_cpufreq_notifier | |
4147 | }; | |
4148 | ||
b820cc0c ZA |
4149 | static void kvm_timer_init(void) |
4150 | { | |
4151 | int cpu; | |
4152 | ||
b820cc0c | 4153 | if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) { |
b820cc0c ZA |
4154 | cpufreq_register_notifier(&kvmclock_cpufreq_notifier_block, |
4155 | CPUFREQ_TRANSITION_NOTIFIER); | |
6b7d7e76 ZA |
4156 | for_each_online_cpu(cpu) { |
4157 | unsigned long khz = cpufreq_get(cpu); | |
4158 | if (!khz) | |
4159 | khz = tsc_khz; | |
4160 | per_cpu(cpu_tsc_khz, cpu) = khz; | |
4161 | } | |
0cca7907 ZA |
4162 | } else { |
4163 | for_each_possible_cpu(cpu) | |
4164 | per_cpu(cpu_tsc_khz, cpu) = tsc_khz; | |
b820cc0c ZA |
4165 | } |
4166 | } | |
4167 | ||
ff9d07a0 ZY |
4168 | static DEFINE_PER_CPU(struct kvm_vcpu *, current_vcpu); |
4169 | ||
4170 | static int kvm_is_in_guest(void) | |
4171 | { | |
4172 | return percpu_read(current_vcpu) != NULL; | |
4173 | } | |
4174 | ||
4175 | static int kvm_is_user_mode(void) | |
4176 | { | |
4177 | int user_mode = 3; | |
dcf46b94 | 4178 | |
ff9d07a0 ZY |
4179 | if (percpu_read(current_vcpu)) |
4180 | user_mode = kvm_x86_ops->get_cpl(percpu_read(current_vcpu)); | |
dcf46b94 | 4181 | |
ff9d07a0 ZY |
4182 | return user_mode != 0; |
4183 | } | |
4184 | ||
4185 | static unsigned long kvm_get_guest_ip(void) | |
4186 | { | |
4187 | unsigned long ip = 0; | |
dcf46b94 | 4188 | |
ff9d07a0 ZY |
4189 | if (percpu_read(current_vcpu)) |
4190 | ip = kvm_rip_read(percpu_read(current_vcpu)); | |
dcf46b94 | 4191 | |
ff9d07a0 ZY |
4192 | return ip; |
4193 | } | |
4194 | ||
4195 | static struct perf_guest_info_callbacks kvm_guest_cbs = { | |
4196 | .is_in_guest = kvm_is_in_guest, | |
4197 | .is_user_mode = kvm_is_user_mode, | |
4198 | .get_guest_ip = kvm_get_guest_ip, | |
4199 | }; | |
4200 | ||
4201 | void kvm_before_handle_nmi(struct kvm_vcpu *vcpu) | |
4202 | { | |
4203 | percpu_write(current_vcpu, vcpu); | |
4204 | } | |
4205 | EXPORT_SYMBOL_GPL(kvm_before_handle_nmi); | |
4206 | ||
4207 | void kvm_after_handle_nmi(struct kvm_vcpu *vcpu) | |
4208 | { | |
4209 | percpu_write(current_vcpu, NULL); | |
4210 | } | |
4211 | EXPORT_SYMBOL_GPL(kvm_after_handle_nmi); | |
4212 | ||
f8c16bba | 4213 | int kvm_arch_init(void *opaque) |
043405e1 | 4214 | { |
b820cc0c | 4215 | int r; |
f8c16bba ZX |
4216 | struct kvm_x86_ops *ops = (struct kvm_x86_ops *)opaque; |
4217 | ||
f8c16bba ZX |
4218 | if (kvm_x86_ops) { |
4219 | printk(KERN_ERR "kvm: already loaded the other module\n"); | |
56c6d28a ZX |
4220 | r = -EEXIST; |
4221 | goto out; | |
f8c16bba ZX |
4222 | } |
4223 | ||
4224 | if (!ops->cpu_has_kvm_support()) { | |
4225 | printk(KERN_ERR "kvm: no hardware support\n"); | |
56c6d28a ZX |
4226 | r = -EOPNOTSUPP; |
4227 | goto out; | |
f8c16bba ZX |
4228 | } |
4229 | if (ops->disabled_by_bios()) { | |
4230 | printk(KERN_ERR "kvm: disabled by bios\n"); | |
56c6d28a ZX |
4231 | r = -EOPNOTSUPP; |
4232 | goto out; | |
f8c16bba ZX |
4233 | } |
4234 | ||
97db56ce AK |
4235 | r = kvm_mmu_module_init(); |
4236 | if (r) | |
4237 | goto out; | |
4238 | ||
4239 | kvm_init_msr_list(); | |
4240 | ||
f8c16bba | 4241 | kvm_x86_ops = ops; |
56c6d28a | 4242 | kvm_mmu_set_nonpresent_ptes(0ull, 0ull); |
7b52345e SY |
4243 | kvm_mmu_set_base_ptes(PT_PRESENT_MASK); |
4244 | kvm_mmu_set_mask_ptes(PT_USER_MASK, PT_ACCESSED_MASK, | |
4b12f0de | 4245 | PT_DIRTY_MASK, PT64_NX_MASK, 0); |
c8076604 | 4246 | |
b820cc0c | 4247 | kvm_timer_init(); |
c8076604 | 4248 | |
ff9d07a0 ZY |
4249 | perf_register_guest_info_callbacks(&kvm_guest_cbs); |
4250 | ||
2acf923e DC |
4251 | if (cpu_has_xsave) |
4252 | host_xcr0 = xgetbv(XCR_XFEATURE_ENABLED_MASK); | |
4253 | ||
f8c16bba | 4254 | return 0; |
56c6d28a ZX |
4255 | |
4256 | out: | |
56c6d28a | 4257 | return r; |
043405e1 | 4258 | } |
8776e519 | 4259 | |
f8c16bba ZX |
4260 | void kvm_arch_exit(void) |
4261 | { | |
ff9d07a0 ZY |
4262 | perf_unregister_guest_info_callbacks(&kvm_guest_cbs); |
4263 | ||
888d256e JK |
4264 | if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) |
4265 | cpufreq_unregister_notifier(&kvmclock_cpufreq_notifier_block, | |
4266 | CPUFREQ_TRANSITION_NOTIFIER); | |
f8c16bba | 4267 | kvm_x86_ops = NULL; |
56c6d28a ZX |
4268 | kvm_mmu_module_exit(); |
4269 | } | |
f8c16bba | 4270 | |
8776e519 HB |
4271 | int kvm_emulate_halt(struct kvm_vcpu *vcpu) |
4272 | { | |
4273 | ++vcpu->stat.halt_exits; | |
4274 | if (irqchip_in_kernel(vcpu->kvm)) { | |
a4535290 | 4275 | vcpu->arch.mp_state = KVM_MP_STATE_HALTED; |
8776e519 HB |
4276 | return 1; |
4277 | } else { | |
4278 | vcpu->run->exit_reason = KVM_EXIT_HLT; | |
4279 | return 0; | |
4280 | } | |
4281 | } | |
4282 | EXPORT_SYMBOL_GPL(kvm_emulate_halt); | |
4283 | ||
2f333bcb MT |
4284 | static inline gpa_t hc_gpa(struct kvm_vcpu *vcpu, unsigned long a0, |
4285 | unsigned long a1) | |
4286 | { | |
4287 | if (is_long_mode(vcpu)) | |
4288 | return a0; | |
4289 | else | |
4290 | return a0 | ((gpa_t)a1 << 32); | |
4291 | } | |
4292 | ||
55cd8e5a GN |
4293 | int kvm_hv_hypercall(struct kvm_vcpu *vcpu) |
4294 | { | |
4295 | u64 param, ingpa, outgpa, ret; | |
4296 | uint16_t code, rep_idx, rep_cnt, res = HV_STATUS_SUCCESS, rep_done = 0; | |
4297 | bool fast, longmode; | |
4298 | int cs_db, cs_l; | |
4299 | ||
4300 | /* | |
4301 | * hypercall generates UD from non zero cpl and real mode | |
4302 | * per HYPER-V spec | |
4303 | */ | |
3eeb3288 | 4304 | if (kvm_x86_ops->get_cpl(vcpu) != 0 || !is_protmode(vcpu)) { |
55cd8e5a GN |
4305 | kvm_queue_exception(vcpu, UD_VECTOR); |
4306 | return 0; | |
4307 | } | |
4308 | ||
4309 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); | |
4310 | longmode = is_long_mode(vcpu) && cs_l == 1; | |
4311 | ||
4312 | if (!longmode) { | |
ccd46936 GN |
4313 | param = ((u64)kvm_register_read(vcpu, VCPU_REGS_RDX) << 32) | |
4314 | (kvm_register_read(vcpu, VCPU_REGS_RAX) & 0xffffffff); | |
4315 | ingpa = ((u64)kvm_register_read(vcpu, VCPU_REGS_RBX) << 32) | | |
4316 | (kvm_register_read(vcpu, VCPU_REGS_RCX) & 0xffffffff); | |
4317 | outgpa = ((u64)kvm_register_read(vcpu, VCPU_REGS_RDI) << 32) | | |
4318 | (kvm_register_read(vcpu, VCPU_REGS_RSI) & 0xffffffff); | |
55cd8e5a GN |
4319 | } |
4320 | #ifdef CONFIG_X86_64 | |
4321 | else { | |
4322 | param = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
4323 | ingpa = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
4324 | outgpa = kvm_register_read(vcpu, VCPU_REGS_R8); | |
4325 | } | |
4326 | #endif | |
4327 | ||
4328 | code = param & 0xffff; | |
4329 | fast = (param >> 16) & 0x1; | |
4330 | rep_cnt = (param >> 32) & 0xfff; | |
4331 | rep_idx = (param >> 48) & 0xfff; | |
4332 | ||
4333 | trace_kvm_hv_hypercall(code, fast, rep_cnt, rep_idx, ingpa, outgpa); | |
4334 | ||
c25bc163 GN |
4335 | switch (code) { |
4336 | case HV_X64_HV_NOTIFY_LONG_SPIN_WAIT: | |
4337 | kvm_vcpu_on_spin(vcpu); | |
4338 | break; | |
4339 | default: | |
4340 | res = HV_STATUS_INVALID_HYPERCALL_CODE; | |
4341 | break; | |
4342 | } | |
55cd8e5a GN |
4343 | |
4344 | ret = res | (((u64)rep_done & 0xfff) << 32); | |
4345 | if (longmode) { | |
4346 | kvm_register_write(vcpu, VCPU_REGS_RAX, ret); | |
4347 | } else { | |
4348 | kvm_register_write(vcpu, VCPU_REGS_RDX, ret >> 32); | |
4349 | kvm_register_write(vcpu, VCPU_REGS_RAX, ret & 0xffffffff); | |
4350 | } | |
4351 | ||
4352 | return 1; | |
4353 | } | |
4354 | ||
8776e519 HB |
4355 | int kvm_emulate_hypercall(struct kvm_vcpu *vcpu) |
4356 | { | |
4357 | unsigned long nr, a0, a1, a2, a3, ret; | |
2f333bcb | 4358 | int r = 1; |
8776e519 | 4359 | |
55cd8e5a GN |
4360 | if (kvm_hv_hypercall_enabled(vcpu->kvm)) |
4361 | return kvm_hv_hypercall(vcpu); | |
4362 | ||
5fdbf976 MT |
4363 | nr = kvm_register_read(vcpu, VCPU_REGS_RAX); |
4364 | a0 = kvm_register_read(vcpu, VCPU_REGS_RBX); | |
4365 | a1 = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
4366 | a2 = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
4367 | a3 = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
8776e519 | 4368 | |
229456fc | 4369 | trace_kvm_hypercall(nr, a0, a1, a2, a3); |
2714d1d3 | 4370 | |
8776e519 HB |
4371 | if (!is_long_mode(vcpu)) { |
4372 | nr &= 0xFFFFFFFF; | |
4373 | a0 &= 0xFFFFFFFF; | |
4374 | a1 &= 0xFFFFFFFF; | |
4375 | a2 &= 0xFFFFFFFF; | |
4376 | a3 &= 0xFFFFFFFF; | |
4377 | } | |
4378 | ||
07708c4a JK |
4379 | if (kvm_x86_ops->get_cpl(vcpu) != 0) { |
4380 | ret = -KVM_EPERM; | |
4381 | goto out; | |
4382 | } | |
4383 | ||
8776e519 | 4384 | switch (nr) { |
b93463aa AK |
4385 | case KVM_HC_VAPIC_POLL_IRQ: |
4386 | ret = 0; | |
4387 | break; | |
2f333bcb MT |
4388 | case KVM_HC_MMU_OP: |
4389 | r = kvm_pv_mmu_op(vcpu, a0, hc_gpa(vcpu, a1, a2), &ret); | |
4390 | break; | |
8776e519 HB |
4391 | default: |
4392 | ret = -KVM_ENOSYS; | |
4393 | break; | |
4394 | } | |
07708c4a | 4395 | out: |
5fdbf976 | 4396 | kvm_register_write(vcpu, VCPU_REGS_RAX, ret); |
f11c3a8d | 4397 | ++vcpu->stat.hypercalls; |
2f333bcb | 4398 | return r; |
8776e519 HB |
4399 | } |
4400 | EXPORT_SYMBOL_GPL(kvm_emulate_hypercall); | |
4401 | ||
4402 | int kvm_fix_hypercall(struct kvm_vcpu *vcpu) | |
4403 | { | |
4404 | char instruction[3]; | |
5fdbf976 | 4405 | unsigned long rip = kvm_rip_read(vcpu); |
8776e519 | 4406 | |
8776e519 HB |
4407 | /* |
4408 | * Blow out the MMU to ensure that no other VCPU has an active mapping | |
4409 | * to ensure that the updated hypercall appears atomically across all | |
4410 | * VCPUs. | |
4411 | */ | |
4412 | kvm_mmu_zap_all(vcpu->kvm); | |
4413 | ||
8776e519 | 4414 | kvm_x86_ops->patch_hypercall(vcpu, instruction); |
8776e519 | 4415 | |
8fe681e9 | 4416 | return emulator_write_emulated(rip, instruction, 3, NULL, vcpu); |
8776e519 HB |
4417 | } |
4418 | ||
8776e519 HB |
4419 | void realmode_lgdt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base) |
4420 | { | |
89a27f4d | 4421 | struct desc_ptr dt = { limit, base }; |
8776e519 HB |
4422 | |
4423 | kvm_x86_ops->set_gdt(vcpu, &dt); | |
4424 | } | |
4425 | ||
4426 | void realmode_lidt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base) | |
4427 | { | |
89a27f4d | 4428 | struct desc_ptr dt = { limit, base }; |
8776e519 HB |
4429 | |
4430 | kvm_x86_ops->set_idt(vcpu, &dt); | |
4431 | } | |
4432 | ||
07716717 DK |
4433 | static int move_to_next_stateful_cpuid_entry(struct kvm_vcpu *vcpu, int i) |
4434 | { | |
ad312c7c ZX |
4435 | struct kvm_cpuid_entry2 *e = &vcpu->arch.cpuid_entries[i]; |
4436 | int j, nent = vcpu->arch.cpuid_nent; | |
07716717 DK |
4437 | |
4438 | e->flags &= ~KVM_CPUID_FLAG_STATE_READ_NEXT; | |
4439 | /* when no next entry is found, the current entry[i] is reselected */ | |
0fdf8e59 | 4440 | for (j = i + 1; ; j = (j + 1) % nent) { |
ad312c7c | 4441 | struct kvm_cpuid_entry2 *ej = &vcpu->arch.cpuid_entries[j]; |
07716717 DK |
4442 | if (ej->function == e->function) { |
4443 | ej->flags |= KVM_CPUID_FLAG_STATE_READ_NEXT; | |
4444 | return j; | |
4445 | } | |
4446 | } | |
4447 | return 0; /* silence gcc, even though control never reaches here */ | |
4448 | } | |
4449 | ||
4450 | /* find an entry with matching function, matching index (if needed), and that | |
4451 | * should be read next (if it's stateful) */ | |
4452 | static int is_matching_cpuid_entry(struct kvm_cpuid_entry2 *e, | |
4453 | u32 function, u32 index) | |
4454 | { | |
4455 | if (e->function != function) | |
4456 | return 0; | |
4457 | if ((e->flags & KVM_CPUID_FLAG_SIGNIFCANT_INDEX) && e->index != index) | |
4458 | return 0; | |
4459 | if ((e->flags & KVM_CPUID_FLAG_STATEFUL_FUNC) && | |
19355475 | 4460 | !(e->flags & KVM_CPUID_FLAG_STATE_READ_NEXT)) |
07716717 DK |
4461 | return 0; |
4462 | return 1; | |
4463 | } | |
4464 | ||
d8017474 AG |
4465 | struct kvm_cpuid_entry2 *kvm_find_cpuid_entry(struct kvm_vcpu *vcpu, |
4466 | u32 function, u32 index) | |
8776e519 HB |
4467 | { |
4468 | int i; | |
d8017474 | 4469 | struct kvm_cpuid_entry2 *best = NULL; |
8776e519 | 4470 | |
ad312c7c | 4471 | for (i = 0; i < vcpu->arch.cpuid_nent; ++i) { |
d8017474 AG |
4472 | struct kvm_cpuid_entry2 *e; |
4473 | ||
ad312c7c | 4474 | e = &vcpu->arch.cpuid_entries[i]; |
07716717 DK |
4475 | if (is_matching_cpuid_entry(e, function, index)) { |
4476 | if (e->flags & KVM_CPUID_FLAG_STATEFUL_FUNC) | |
4477 | move_to_next_stateful_cpuid_entry(vcpu, i); | |
8776e519 HB |
4478 | best = e; |
4479 | break; | |
4480 | } | |
4481 | /* | |
4482 | * Both basic or both extended? | |
4483 | */ | |
4484 | if (((e->function ^ function) & 0x80000000) == 0) | |
4485 | if (!best || e->function > best->function) | |
4486 | best = e; | |
4487 | } | |
d8017474 AG |
4488 | return best; |
4489 | } | |
0e851880 | 4490 | EXPORT_SYMBOL_GPL(kvm_find_cpuid_entry); |
d8017474 | 4491 | |
82725b20 DE |
4492 | int cpuid_maxphyaddr(struct kvm_vcpu *vcpu) |
4493 | { | |
4494 | struct kvm_cpuid_entry2 *best; | |
4495 | ||
f7a71197 AK |
4496 | best = kvm_find_cpuid_entry(vcpu, 0x80000000, 0); |
4497 | if (!best || best->eax < 0x80000008) | |
4498 | goto not_found; | |
82725b20 DE |
4499 | best = kvm_find_cpuid_entry(vcpu, 0x80000008, 0); |
4500 | if (best) | |
4501 | return best->eax & 0xff; | |
f7a71197 | 4502 | not_found: |
82725b20 DE |
4503 | return 36; |
4504 | } | |
4505 | ||
d8017474 AG |
4506 | void kvm_emulate_cpuid(struct kvm_vcpu *vcpu) |
4507 | { | |
4508 | u32 function, index; | |
4509 | struct kvm_cpuid_entry2 *best; | |
4510 | ||
4511 | function = kvm_register_read(vcpu, VCPU_REGS_RAX); | |
4512 | index = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
4513 | kvm_register_write(vcpu, VCPU_REGS_RAX, 0); | |
4514 | kvm_register_write(vcpu, VCPU_REGS_RBX, 0); | |
4515 | kvm_register_write(vcpu, VCPU_REGS_RCX, 0); | |
4516 | kvm_register_write(vcpu, VCPU_REGS_RDX, 0); | |
4517 | best = kvm_find_cpuid_entry(vcpu, function, index); | |
8776e519 | 4518 | if (best) { |
5fdbf976 MT |
4519 | kvm_register_write(vcpu, VCPU_REGS_RAX, best->eax); |
4520 | kvm_register_write(vcpu, VCPU_REGS_RBX, best->ebx); | |
4521 | kvm_register_write(vcpu, VCPU_REGS_RCX, best->ecx); | |
4522 | kvm_register_write(vcpu, VCPU_REGS_RDX, best->edx); | |
8776e519 | 4523 | } |
8776e519 | 4524 | kvm_x86_ops->skip_emulated_instruction(vcpu); |
229456fc MT |
4525 | trace_kvm_cpuid(function, |
4526 | kvm_register_read(vcpu, VCPU_REGS_RAX), | |
4527 | kvm_register_read(vcpu, VCPU_REGS_RBX), | |
4528 | kvm_register_read(vcpu, VCPU_REGS_RCX), | |
4529 | kvm_register_read(vcpu, VCPU_REGS_RDX)); | |
8776e519 HB |
4530 | } |
4531 | EXPORT_SYMBOL_GPL(kvm_emulate_cpuid); | |
d0752060 | 4532 | |
b6c7a5dc HB |
4533 | /* |
4534 | * Check if userspace requested an interrupt window, and that the | |
4535 | * interrupt window is open. | |
4536 | * | |
4537 | * No need to exit to userspace if we already have an interrupt queued. | |
4538 | */ | |
851ba692 | 4539 | static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu) |
b6c7a5dc | 4540 | { |
8061823a | 4541 | return (!irqchip_in_kernel(vcpu->kvm) && !kvm_cpu_has_interrupt(vcpu) && |
851ba692 | 4542 | vcpu->run->request_interrupt_window && |
5df56646 | 4543 | kvm_arch_interrupt_allowed(vcpu)); |
b6c7a5dc HB |
4544 | } |
4545 | ||
851ba692 | 4546 | static void post_kvm_run_save(struct kvm_vcpu *vcpu) |
b6c7a5dc | 4547 | { |
851ba692 AK |
4548 | struct kvm_run *kvm_run = vcpu->run; |
4549 | ||
91586a3b | 4550 | kvm_run->if_flag = (kvm_get_rflags(vcpu) & X86_EFLAGS_IF) != 0; |
2d3ad1f4 | 4551 | kvm_run->cr8 = kvm_get_cr8(vcpu); |
b6c7a5dc | 4552 | kvm_run->apic_base = kvm_get_apic_base(vcpu); |
4531220b | 4553 | if (irqchip_in_kernel(vcpu->kvm)) |
b6c7a5dc | 4554 | kvm_run->ready_for_interrupt_injection = 1; |
4531220b | 4555 | else |
b6c7a5dc | 4556 | kvm_run->ready_for_interrupt_injection = |
fa9726b0 GN |
4557 | kvm_arch_interrupt_allowed(vcpu) && |
4558 | !kvm_cpu_has_interrupt(vcpu) && | |
4559 | !kvm_event_needs_reinjection(vcpu); | |
b6c7a5dc HB |
4560 | } |
4561 | ||
b93463aa AK |
4562 | static void vapic_enter(struct kvm_vcpu *vcpu) |
4563 | { | |
4564 | struct kvm_lapic *apic = vcpu->arch.apic; | |
4565 | struct page *page; | |
4566 | ||
4567 | if (!apic || !apic->vapic_addr) | |
4568 | return; | |
4569 | ||
4570 | page = gfn_to_page(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT); | |
72dc67a6 IE |
4571 | |
4572 | vcpu->arch.apic->vapic_page = page; | |
b93463aa AK |
4573 | } |
4574 | ||
4575 | static void vapic_exit(struct kvm_vcpu *vcpu) | |
4576 | { | |
4577 | struct kvm_lapic *apic = vcpu->arch.apic; | |
f656ce01 | 4578 | int idx; |
b93463aa AK |
4579 | |
4580 | if (!apic || !apic->vapic_addr) | |
4581 | return; | |
4582 | ||
f656ce01 | 4583 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
b93463aa AK |
4584 | kvm_release_page_dirty(apic->vapic_page); |
4585 | mark_page_dirty(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT); | |
f656ce01 | 4586 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
b93463aa AK |
4587 | } |
4588 | ||
95ba8273 GN |
4589 | static void update_cr8_intercept(struct kvm_vcpu *vcpu) |
4590 | { | |
4591 | int max_irr, tpr; | |
4592 | ||
4593 | if (!kvm_x86_ops->update_cr8_intercept) | |
4594 | return; | |
4595 | ||
88c808fd AK |
4596 | if (!vcpu->arch.apic) |
4597 | return; | |
4598 | ||
8db3baa2 GN |
4599 | if (!vcpu->arch.apic->vapic_addr) |
4600 | max_irr = kvm_lapic_find_highest_irr(vcpu); | |
4601 | else | |
4602 | max_irr = -1; | |
95ba8273 GN |
4603 | |
4604 | if (max_irr != -1) | |
4605 | max_irr >>= 4; | |
4606 | ||
4607 | tpr = kvm_lapic_get_cr8(vcpu); | |
4608 | ||
4609 | kvm_x86_ops->update_cr8_intercept(vcpu, tpr, max_irr); | |
4610 | } | |
4611 | ||
851ba692 | 4612 | static void inject_pending_event(struct kvm_vcpu *vcpu) |
95ba8273 GN |
4613 | { |
4614 | /* try to reinject previous events if any */ | |
b59bb7bd | 4615 | if (vcpu->arch.exception.pending) { |
5c1c85d0 AK |
4616 | trace_kvm_inj_exception(vcpu->arch.exception.nr, |
4617 | vcpu->arch.exception.has_error_code, | |
4618 | vcpu->arch.exception.error_code); | |
b59bb7bd GN |
4619 | kvm_x86_ops->queue_exception(vcpu, vcpu->arch.exception.nr, |
4620 | vcpu->arch.exception.has_error_code, | |
ce7ddec4 JR |
4621 | vcpu->arch.exception.error_code, |
4622 | vcpu->arch.exception.reinject); | |
b59bb7bd GN |
4623 | return; |
4624 | } | |
4625 | ||
95ba8273 GN |
4626 | if (vcpu->arch.nmi_injected) { |
4627 | kvm_x86_ops->set_nmi(vcpu); | |
4628 | return; | |
4629 | } | |
4630 | ||
4631 | if (vcpu->arch.interrupt.pending) { | |
66fd3f7f | 4632 | kvm_x86_ops->set_irq(vcpu); |
95ba8273 GN |
4633 | return; |
4634 | } | |
4635 | ||
4636 | /* try to inject new event if pending */ | |
4637 | if (vcpu->arch.nmi_pending) { | |
4638 | if (kvm_x86_ops->nmi_allowed(vcpu)) { | |
4639 | vcpu->arch.nmi_pending = false; | |
4640 | vcpu->arch.nmi_injected = true; | |
4641 | kvm_x86_ops->set_nmi(vcpu); | |
4642 | } | |
4643 | } else if (kvm_cpu_has_interrupt(vcpu)) { | |
4644 | if (kvm_x86_ops->interrupt_allowed(vcpu)) { | |
66fd3f7f GN |
4645 | kvm_queue_interrupt(vcpu, kvm_cpu_get_interrupt(vcpu), |
4646 | false); | |
4647 | kvm_x86_ops->set_irq(vcpu); | |
95ba8273 GN |
4648 | } |
4649 | } | |
4650 | } | |
4651 | ||
2acf923e DC |
4652 | static void kvm_load_guest_xcr0(struct kvm_vcpu *vcpu) |
4653 | { | |
4654 | if (kvm_read_cr4_bits(vcpu, X86_CR4_OSXSAVE) && | |
4655 | !vcpu->guest_xcr0_loaded) { | |
4656 | /* kvm_set_xcr() also depends on this */ | |
4657 | xsetbv(XCR_XFEATURE_ENABLED_MASK, vcpu->arch.xcr0); | |
4658 | vcpu->guest_xcr0_loaded = 1; | |
4659 | } | |
4660 | } | |
4661 | ||
4662 | static void kvm_put_guest_xcr0(struct kvm_vcpu *vcpu) | |
4663 | { | |
4664 | if (vcpu->guest_xcr0_loaded) { | |
4665 | if (vcpu->arch.xcr0 != host_xcr0) | |
4666 | xsetbv(XCR_XFEATURE_ENABLED_MASK, host_xcr0); | |
4667 | vcpu->guest_xcr0_loaded = 0; | |
4668 | } | |
4669 | } | |
4670 | ||
851ba692 | 4671 | static int vcpu_enter_guest(struct kvm_vcpu *vcpu) |
b6c7a5dc HB |
4672 | { |
4673 | int r; | |
6a8b1d13 | 4674 | bool req_int_win = !irqchip_in_kernel(vcpu->kvm) && |
851ba692 | 4675 | vcpu->run->request_interrupt_window; |
b6c7a5dc | 4676 | |
3e007509 | 4677 | if (vcpu->requests) { |
a8eeb04a | 4678 | if (kvm_check_request(KVM_REQ_MMU_RELOAD, vcpu)) |
2e53d63a | 4679 | kvm_mmu_unload(vcpu); |
a8eeb04a | 4680 | if (kvm_check_request(KVM_REQ_MIGRATE_TIMER, vcpu)) |
2f599714 | 4681 | __kvm_migrate_timers(vcpu); |
a8eeb04a | 4682 | if (kvm_check_request(KVM_REQ_KVMCLOCK_UPDATE, vcpu)) |
c8076604 | 4683 | kvm_write_guest_time(vcpu); |
a8eeb04a | 4684 | if (kvm_check_request(KVM_REQ_MMU_SYNC, vcpu)) |
4731d4c7 | 4685 | kvm_mmu_sync_roots(vcpu); |
a8eeb04a | 4686 | if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu)) |
d4acf7e7 | 4687 | kvm_x86_ops->tlb_flush(vcpu); |
a8eeb04a | 4688 | if (kvm_check_request(KVM_REQ_REPORT_TPR_ACCESS, vcpu)) { |
851ba692 | 4689 | vcpu->run->exit_reason = KVM_EXIT_TPR_ACCESS; |
b93463aa AK |
4690 | r = 0; |
4691 | goto out; | |
4692 | } | |
a8eeb04a | 4693 | if (kvm_check_request(KVM_REQ_TRIPLE_FAULT, vcpu)) { |
851ba692 | 4694 | vcpu->run->exit_reason = KVM_EXIT_SHUTDOWN; |
71c4dfaf JR |
4695 | r = 0; |
4696 | goto out; | |
4697 | } | |
a8eeb04a | 4698 | if (kvm_check_request(KVM_REQ_DEACTIVATE_FPU, vcpu)) { |
02daab21 AK |
4699 | vcpu->fpu_active = 0; |
4700 | kvm_x86_ops->fpu_deactivate(vcpu); | |
4701 | } | |
2f52d58c | 4702 | } |
b93463aa | 4703 | |
3e007509 AK |
4704 | r = kvm_mmu_reload(vcpu); |
4705 | if (unlikely(r)) | |
4706 | goto out; | |
4707 | ||
b6c7a5dc HB |
4708 | preempt_disable(); |
4709 | ||
4710 | kvm_x86_ops->prepare_guest_switch(vcpu); | |
2608d7a1 AK |
4711 | if (vcpu->fpu_active) |
4712 | kvm_load_guest_fpu(vcpu); | |
2acf923e | 4713 | kvm_load_guest_xcr0(vcpu); |
b6c7a5dc | 4714 | |
d94e1dc9 AK |
4715 | atomic_set(&vcpu->guest_mode, 1); |
4716 | smp_wmb(); | |
b6c7a5dc | 4717 | |
d94e1dc9 | 4718 | local_irq_disable(); |
32f88400 | 4719 | |
d94e1dc9 AK |
4720 | if (!atomic_read(&vcpu->guest_mode) || vcpu->requests |
4721 | || need_resched() || signal_pending(current)) { | |
4722 | atomic_set(&vcpu->guest_mode, 0); | |
4723 | smp_wmb(); | |
6c142801 AK |
4724 | local_irq_enable(); |
4725 | preempt_enable(); | |
4726 | r = 1; | |
4727 | goto out; | |
4728 | } | |
4729 | ||
851ba692 | 4730 | inject_pending_event(vcpu); |
b6c7a5dc | 4731 | |
6a8b1d13 GN |
4732 | /* enable NMI/IRQ window open exits if needed */ |
4733 | if (vcpu->arch.nmi_pending) | |
4734 | kvm_x86_ops->enable_nmi_window(vcpu); | |
4735 | else if (kvm_cpu_has_interrupt(vcpu) || req_int_win) | |
4736 | kvm_x86_ops->enable_irq_window(vcpu); | |
4737 | ||
95ba8273 | 4738 | if (kvm_lapic_enabled(vcpu)) { |
8db3baa2 GN |
4739 | update_cr8_intercept(vcpu); |
4740 | kvm_lapic_sync_to_vapic(vcpu); | |
95ba8273 | 4741 | } |
b93463aa | 4742 | |
f656ce01 | 4743 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
3200f405 | 4744 | |
b6c7a5dc HB |
4745 | kvm_guest_enter(); |
4746 | ||
42dbaa5a | 4747 | if (unlikely(vcpu->arch.switch_db_regs)) { |
42dbaa5a JK |
4748 | set_debugreg(0, 7); |
4749 | set_debugreg(vcpu->arch.eff_db[0], 0); | |
4750 | set_debugreg(vcpu->arch.eff_db[1], 1); | |
4751 | set_debugreg(vcpu->arch.eff_db[2], 2); | |
4752 | set_debugreg(vcpu->arch.eff_db[3], 3); | |
4753 | } | |
b6c7a5dc | 4754 | |
229456fc | 4755 | trace_kvm_entry(vcpu->vcpu_id); |
851ba692 | 4756 | kvm_x86_ops->run(vcpu); |
b6c7a5dc | 4757 | |
24f1e32c FW |
4758 | /* |
4759 | * If the guest has used debug registers, at least dr7 | |
4760 | * will be disabled while returning to the host. | |
4761 | * If we don't have active breakpoints in the host, we don't | |
4762 | * care about the messed up debug address registers. But if | |
4763 | * we have some of them active, restore the old state. | |
4764 | */ | |
59d8eb53 | 4765 | if (hw_breakpoint_active()) |
24f1e32c | 4766 | hw_breakpoint_restore(); |
42dbaa5a | 4767 | |
d94e1dc9 AK |
4768 | atomic_set(&vcpu->guest_mode, 0); |
4769 | smp_wmb(); | |
b6c7a5dc HB |
4770 | local_irq_enable(); |
4771 | ||
4772 | ++vcpu->stat.exits; | |
4773 | ||
4774 | /* | |
4775 | * We must have an instruction between local_irq_enable() and | |
4776 | * kvm_guest_exit(), so the timer interrupt isn't delayed by | |
4777 | * the interrupt shadow. The stat.exits increment will do nicely. | |
4778 | * But we need to prevent reordering, hence this barrier(): | |
4779 | */ | |
4780 | barrier(); | |
4781 | ||
4782 | kvm_guest_exit(); | |
4783 | ||
4784 | preempt_enable(); | |
4785 | ||
f656ce01 | 4786 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
3200f405 | 4787 | |
b6c7a5dc HB |
4788 | /* |
4789 | * Profile KVM exit RIPs: | |
4790 | */ | |
4791 | if (unlikely(prof_on == KVM_PROFILING)) { | |
5fdbf976 MT |
4792 | unsigned long rip = kvm_rip_read(vcpu); |
4793 | profile_hit(KVM_PROFILING, (void *)rip); | |
b6c7a5dc HB |
4794 | } |
4795 | ||
298101da | 4796 | |
b93463aa AK |
4797 | kvm_lapic_sync_from_vapic(vcpu); |
4798 | ||
851ba692 | 4799 | r = kvm_x86_ops->handle_exit(vcpu); |
d7690175 MT |
4800 | out: |
4801 | return r; | |
4802 | } | |
b6c7a5dc | 4803 | |
09cec754 | 4804 | |
851ba692 | 4805 | static int __vcpu_run(struct kvm_vcpu *vcpu) |
d7690175 MT |
4806 | { |
4807 | int r; | |
f656ce01 | 4808 | struct kvm *kvm = vcpu->kvm; |
d7690175 MT |
4809 | |
4810 | if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_SIPI_RECEIVED)) { | |
1b10bf31 JK |
4811 | pr_debug("vcpu %d received sipi with vector # %x\n", |
4812 | vcpu->vcpu_id, vcpu->arch.sipi_vector); | |
d7690175 | 4813 | kvm_lapic_reset(vcpu); |
5f179287 | 4814 | r = kvm_arch_vcpu_reset(vcpu); |
d7690175 MT |
4815 | if (r) |
4816 | return r; | |
4817 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; | |
b6c7a5dc HB |
4818 | } |
4819 | ||
f656ce01 | 4820 | vcpu->srcu_idx = srcu_read_lock(&kvm->srcu); |
d7690175 MT |
4821 | vapic_enter(vcpu); |
4822 | ||
4823 | r = 1; | |
4824 | while (r > 0) { | |
af2152f5 | 4825 | if (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE) |
851ba692 | 4826 | r = vcpu_enter_guest(vcpu); |
d7690175 | 4827 | else { |
f656ce01 | 4828 | srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx); |
d7690175 | 4829 | kvm_vcpu_block(vcpu); |
f656ce01 | 4830 | vcpu->srcu_idx = srcu_read_lock(&kvm->srcu); |
a8eeb04a | 4831 | if (kvm_check_request(KVM_REQ_UNHALT, vcpu)) |
09cec754 GN |
4832 | { |
4833 | switch(vcpu->arch.mp_state) { | |
4834 | case KVM_MP_STATE_HALTED: | |
d7690175 | 4835 | vcpu->arch.mp_state = |
09cec754 GN |
4836 | KVM_MP_STATE_RUNNABLE; |
4837 | case KVM_MP_STATE_RUNNABLE: | |
4838 | break; | |
4839 | case KVM_MP_STATE_SIPI_RECEIVED: | |
4840 | default: | |
4841 | r = -EINTR; | |
4842 | break; | |
4843 | } | |
4844 | } | |
d7690175 MT |
4845 | } |
4846 | ||
09cec754 GN |
4847 | if (r <= 0) |
4848 | break; | |
4849 | ||
4850 | clear_bit(KVM_REQ_PENDING_TIMER, &vcpu->requests); | |
4851 | if (kvm_cpu_has_pending_timer(vcpu)) | |
4852 | kvm_inject_pending_timer_irqs(vcpu); | |
4853 | ||
851ba692 | 4854 | if (dm_request_for_irq_injection(vcpu)) { |
09cec754 | 4855 | r = -EINTR; |
851ba692 | 4856 | vcpu->run->exit_reason = KVM_EXIT_INTR; |
09cec754 GN |
4857 | ++vcpu->stat.request_irq_exits; |
4858 | } | |
4859 | if (signal_pending(current)) { | |
4860 | r = -EINTR; | |
851ba692 | 4861 | vcpu->run->exit_reason = KVM_EXIT_INTR; |
09cec754 GN |
4862 | ++vcpu->stat.signal_exits; |
4863 | } | |
4864 | if (need_resched()) { | |
f656ce01 | 4865 | srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx); |
09cec754 | 4866 | kvm_resched(vcpu); |
f656ce01 | 4867 | vcpu->srcu_idx = srcu_read_lock(&kvm->srcu); |
d7690175 | 4868 | } |
b6c7a5dc HB |
4869 | } |
4870 | ||
f656ce01 | 4871 | srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx); |
b6c7a5dc | 4872 | |
b93463aa AK |
4873 | vapic_exit(vcpu); |
4874 | ||
b6c7a5dc HB |
4875 | return r; |
4876 | } | |
4877 | ||
4878 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
4879 | { | |
4880 | int r; | |
4881 | sigset_t sigsaved; | |
4882 | ||
ac9f6dc0 AK |
4883 | if (vcpu->sigset_active) |
4884 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
4885 | ||
a4535290 | 4886 | if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)) { |
b6c7a5dc | 4887 | kvm_vcpu_block(vcpu); |
d7690175 | 4888 | clear_bit(KVM_REQ_UNHALT, &vcpu->requests); |
ac9f6dc0 AK |
4889 | r = -EAGAIN; |
4890 | goto out; | |
b6c7a5dc HB |
4891 | } |
4892 | ||
b6c7a5dc HB |
4893 | /* re-sync apic's tpr */ |
4894 | if (!irqchip_in_kernel(vcpu->kvm)) | |
2d3ad1f4 | 4895 | kvm_set_cr8(vcpu, kvm_run->cr8); |
b6c7a5dc | 4896 | |
92bf9748 GN |
4897 | if (vcpu->arch.pio.count || vcpu->mmio_needed || |
4898 | vcpu->arch.emulate_ctxt.restart) { | |
4899 | if (vcpu->mmio_needed) { | |
4900 | memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8); | |
4901 | vcpu->mmio_read_completed = 1; | |
4902 | vcpu->mmio_needed = 0; | |
b6c7a5dc | 4903 | } |
f656ce01 | 4904 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
5cd21917 | 4905 | r = emulate_instruction(vcpu, 0, 0, EMULTYPE_NO_DECODE); |
f656ce01 | 4906 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
6d77dbfc | 4907 | if (r != EMULATE_DONE) { |
b6c7a5dc HB |
4908 | r = 0; |
4909 | goto out; | |
4910 | } | |
4911 | } | |
5fdbf976 MT |
4912 | if (kvm_run->exit_reason == KVM_EXIT_HYPERCALL) |
4913 | kvm_register_write(vcpu, VCPU_REGS_RAX, | |
4914 | kvm_run->hypercall.ret); | |
b6c7a5dc | 4915 | |
851ba692 | 4916 | r = __vcpu_run(vcpu); |
b6c7a5dc HB |
4917 | |
4918 | out: | |
f1d86e46 | 4919 | post_kvm_run_save(vcpu); |
b6c7a5dc HB |
4920 | if (vcpu->sigset_active) |
4921 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
4922 | ||
b6c7a5dc HB |
4923 | return r; |
4924 | } | |
4925 | ||
4926 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
4927 | { | |
5fdbf976 MT |
4928 | regs->rax = kvm_register_read(vcpu, VCPU_REGS_RAX); |
4929 | regs->rbx = kvm_register_read(vcpu, VCPU_REGS_RBX); | |
4930 | regs->rcx = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
4931 | regs->rdx = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
4932 | regs->rsi = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
4933 | regs->rdi = kvm_register_read(vcpu, VCPU_REGS_RDI); | |
4934 | regs->rsp = kvm_register_read(vcpu, VCPU_REGS_RSP); | |
4935 | regs->rbp = kvm_register_read(vcpu, VCPU_REGS_RBP); | |
b6c7a5dc | 4936 | #ifdef CONFIG_X86_64 |
5fdbf976 MT |
4937 | regs->r8 = kvm_register_read(vcpu, VCPU_REGS_R8); |
4938 | regs->r9 = kvm_register_read(vcpu, VCPU_REGS_R9); | |
4939 | regs->r10 = kvm_register_read(vcpu, VCPU_REGS_R10); | |
4940 | regs->r11 = kvm_register_read(vcpu, VCPU_REGS_R11); | |
4941 | regs->r12 = kvm_register_read(vcpu, VCPU_REGS_R12); | |
4942 | regs->r13 = kvm_register_read(vcpu, VCPU_REGS_R13); | |
4943 | regs->r14 = kvm_register_read(vcpu, VCPU_REGS_R14); | |
4944 | regs->r15 = kvm_register_read(vcpu, VCPU_REGS_R15); | |
b6c7a5dc HB |
4945 | #endif |
4946 | ||
5fdbf976 | 4947 | regs->rip = kvm_rip_read(vcpu); |
91586a3b | 4948 | regs->rflags = kvm_get_rflags(vcpu); |
b6c7a5dc | 4949 | |
b6c7a5dc HB |
4950 | return 0; |
4951 | } | |
4952 | ||
4953 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
4954 | { | |
5fdbf976 MT |
4955 | kvm_register_write(vcpu, VCPU_REGS_RAX, regs->rax); |
4956 | kvm_register_write(vcpu, VCPU_REGS_RBX, regs->rbx); | |
4957 | kvm_register_write(vcpu, VCPU_REGS_RCX, regs->rcx); | |
4958 | kvm_register_write(vcpu, VCPU_REGS_RDX, regs->rdx); | |
4959 | kvm_register_write(vcpu, VCPU_REGS_RSI, regs->rsi); | |
4960 | kvm_register_write(vcpu, VCPU_REGS_RDI, regs->rdi); | |
4961 | kvm_register_write(vcpu, VCPU_REGS_RSP, regs->rsp); | |
4962 | kvm_register_write(vcpu, VCPU_REGS_RBP, regs->rbp); | |
b6c7a5dc | 4963 | #ifdef CONFIG_X86_64 |
5fdbf976 MT |
4964 | kvm_register_write(vcpu, VCPU_REGS_R8, regs->r8); |
4965 | kvm_register_write(vcpu, VCPU_REGS_R9, regs->r9); | |
4966 | kvm_register_write(vcpu, VCPU_REGS_R10, regs->r10); | |
4967 | kvm_register_write(vcpu, VCPU_REGS_R11, regs->r11); | |
4968 | kvm_register_write(vcpu, VCPU_REGS_R12, regs->r12); | |
4969 | kvm_register_write(vcpu, VCPU_REGS_R13, regs->r13); | |
4970 | kvm_register_write(vcpu, VCPU_REGS_R14, regs->r14); | |
4971 | kvm_register_write(vcpu, VCPU_REGS_R15, regs->r15); | |
b6c7a5dc HB |
4972 | #endif |
4973 | ||
5fdbf976 | 4974 | kvm_rip_write(vcpu, regs->rip); |
91586a3b | 4975 | kvm_set_rflags(vcpu, regs->rflags); |
b6c7a5dc | 4976 | |
b4f14abd JK |
4977 | vcpu->arch.exception.pending = false; |
4978 | ||
b6c7a5dc HB |
4979 | return 0; |
4980 | } | |
4981 | ||
b6c7a5dc HB |
4982 | void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l) |
4983 | { | |
4984 | struct kvm_segment cs; | |
4985 | ||
3e6e0aab | 4986 | kvm_get_segment(vcpu, &cs, VCPU_SREG_CS); |
b6c7a5dc HB |
4987 | *db = cs.db; |
4988 | *l = cs.l; | |
4989 | } | |
4990 | EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits); | |
4991 | ||
4992 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, | |
4993 | struct kvm_sregs *sregs) | |
4994 | { | |
89a27f4d | 4995 | struct desc_ptr dt; |
b6c7a5dc | 4996 | |
3e6e0aab GT |
4997 | kvm_get_segment(vcpu, &sregs->cs, VCPU_SREG_CS); |
4998 | kvm_get_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
4999 | kvm_get_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
5000 | kvm_get_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
5001 | kvm_get_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
5002 | kvm_get_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
b6c7a5dc | 5003 | |
3e6e0aab GT |
5004 | kvm_get_segment(vcpu, &sregs->tr, VCPU_SREG_TR); |
5005 | kvm_get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
b6c7a5dc HB |
5006 | |
5007 | kvm_x86_ops->get_idt(vcpu, &dt); | |
89a27f4d GN |
5008 | sregs->idt.limit = dt.size; |
5009 | sregs->idt.base = dt.address; | |
b6c7a5dc | 5010 | kvm_x86_ops->get_gdt(vcpu, &dt); |
89a27f4d GN |
5011 | sregs->gdt.limit = dt.size; |
5012 | sregs->gdt.base = dt.address; | |
b6c7a5dc | 5013 | |
4d4ec087 | 5014 | sregs->cr0 = kvm_read_cr0(vcpu); |
ad312c7c ZX |
5015 | sregs->cr2 = vcpu->arch.cr2; |
5016 | sregs->cr3 = vcpu->arch.cr3; | |
fc78f519 | 5017 | sregs->cr4 = kvm_read_cr4(vcpu); |
2d3ad1f4 | 5018 | sregs->cr8 = kvm_get_cr8(vcpu); |
f6801dff | 5019 | sregs->efer = vcpu->arch.efer; |
b6c7a5dc HB |
5020 | sregs->apic_base = kvm_get_apic_base(vcpu); |
5021 | ||
923c61bb | 5022 | memset(sregs->interrupt_bitmap, 0, sizeof sregs->interrupt_bitmap); |
b6c7a5dc | 5023 | |
36752c9b | 5024 | if (vcpu->arch.interrupt.pending && !vcpu->arch.interrupt.soft) |
14d0bc1f GN |
5025 | set_bit(vcpu->arch.interrupt.nr, |
5026 | (unsigned long *)sregs->interrupt_bitmap); | |
16d7a191 | 5027 | |
b6c7a5dc HB |
5028 | return 0; |
5029 | } | |
5030 | ||
62d9f0db MT |
5031 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
5032 | struct kvm_mp_state *mp_state) | |
5033 | { | |
62d9f0db | 5034 | mp_state->mp_state = vcpu->arch.mp_state; |
62d9f0db MT |
5035 | return 0; |
5036 | } | |
5037 | ||
5038 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
5039 | struct kvm_mp_state *mp_state) | |
5040 | { | |
62d9f0db | 5041 | vcpu->arch.mp_state = mp_state->mp_state; |
62d9f0db MT |
5042 | return 0; |
5043 | } | |
5044 | ||
e269fb21 JK |
5045 | int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int reason, |
5046 | bool has_error_code, u32 error_code) | |
b6c7a5dc | 5047 | { |
4d2179e1 | 5048 | struct decode_cache *c = &vcpu->arch.emulate_ctxt.decode; |
ceffb459 GN |
5049 | int cs_db, cs_l, ret; |
5050 | cache_all_regs(vcpu); | |
37817f29 | 5051 | |
ceffb459 | 5052 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); |
e01c2426 | 5053 | |
ceffb459 GN |
5054 | vcpu->arch.emulate_ctxt.vcpu = vcpu; |
5055 | vcpu->arch.emulate_ctxt.eflags = kvm_x86_ops->get_rflags(vcpu); | |
5056 | vcpu->arch.emulate_ctxt.eip = kvm_rip_read(vcpu); | |
5057 | vcpu->arch.emulate_ctxt.mode = | |
5058 | (!is_protmode(vcpu)) ? X86EMUL_MODE_REAL : | |
5059 | (vcpu->arch.emulate_ctxt.eflags & X86_EFLAGS_VM) | |
5060 | ? X86EMUL_MODE_VM86 : cs_l | |
5061 | ? X86EMUL_MODE_PROT64 : cs_db | |
5062 | ? X86EMUL_MODE_PROT32 : X86EMUL_MODE_PROT16; | |
4d2179e1 GN |
5063 | memset(c, 0, sizeof(struct decode_cache)); |
5064 | memcpy(c->regs, vcpu->arch.regs, sizeof c->regs); | |
c697518a | 5065 | |
ceffb459 | 5066 | ret = emulator_task_switch(&vcpu->arch.emulate_ctxt, &emulate_ops, |
e269fb21 JK |
5067 | tss_selector, reason, has_error_code, |
5068 | error_code); | |
c697518a | 5069 | |
c697518a | 5070 | if (ret) |
19d04437 | 5071 | return EMULATE_FAIL; |
37817f29 | 5072 | |
4d2179e1 | 5073 | memcpy(vcpu->arch.regs, c->regs, sizeof c->regs); |
95c55886 | 5074 | kvm_rip_write(vcpu, vcpu->arch.emulate_ctxt.eip); |
19d04437 GN |
5075 | kvm_x86_ops->set_rflags(vcpu, vcpu->arch.emulate_ctxt.eflags); |
5076 | return EMULATE_DONE; | |
37817f29 IE |
5077 | } |
5078 | EXPORT_SYMBOL_GPL(kvm_task_switch); | |
5079 | ||
b6c7a5dc HB |
5080 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, |
5081 | struct kvm_sregs *sregs) | |
5082 | { | |
5083 | int mmu_reset_needed = 0; | |
923c61bb | 5084 | int pending_vec, max_bits; |
89a27f4d | 5085 | struct desc_ptr dt; |
b6c7a5dc | 5086 | |
89a27f4d GN |
5087 | dt.size = sregs->idt.limit; |
5088 | dt.address = sregs->idt.base; | |
b6c7a5dc | 5089 | kvm_x86_ops->set_idt(vcpu, &dt); |
89a27f4d GN |
5090 | dt.size = sregs->gdt.limit; |
5091 | dt.address = sregs->gdt.base; | |
b6c7a5dc HB |
5092 | kvm_x86_ops->set_gdt(vcpu, &dt); |
5093 | ||
ad312c7c ZX |
5094 | vcpu->arch.cr2 = sregs->cr2; |
5095 | mmu_reset_needed |= vcpu->arch.cr3 != sregs->cr3; | |
dc7e795e | 5096 | vcpu->arch.cr3 = sregs->cr3; |
b6c7a5dc | 5097 | |
2d3ad1f4 | 5098 | kvm_set_cr8(vcpu, sregs->cr8); |
b6c7a5dc | 5099 | |
f6801dff | 5100 | mmu_reset_needed |= vcpu->arch.efer != sregs->efer; |
b6c7a5dc | 5101 | kvm_x86_ops->set_efer(vcpu, sregs->efer); |
b6c7a5dc HB |
5102 | kvm_set_apic_base(vcpu, sregs->apic_base); |
5103 | ||
4d4ec087 | 5104 | mmu_reset_needed |= kvm_read_cr0(vcpu) != sregs->cr0; |
b6c7a5dc | 5105 | kvm_x86_ops->set_cr0(vcpu, sregs->cr0); |
d7306163 | 5106 | vcpu->arch.cr0 = sregs->cr0; |
b6c7a5dc | 5107 | |
fc78f519 | 5108 | mmu_reset_needed |= kvm_read_cr4(vcpu) != sregs->cr4; |
b6c7a5dc | 5109 | kvm_x86_ops->set_cr4(vcpu, sregs->cr4); |
7c93be44 | 5110 | if (!is_long_mode(vcpu) && is_pae(vcpu)) { |
ad312c7c | 5111 | load_pdptrs(vcpu, vcpu->arch.cr3); |
7c93be44 MT |
5112 | mmu_reset_needed = 1; |
5113 | } | |
b6c7a5dc HB |
5114 | |
5115 | if (mmu_reset_needed) | |
5116 | kvm_mmu_reset_context(vcpu); | |
5117 | ||
923c61bb GN |
5118 | max_bits = (sizeof sregs->interrupt_bitmap) << 3; |
5119 | pending_vec = find_first_bit( | |
5120 | (const unsigned long *)sregs->interrupt_bitmap, max_bits); | |
5121 | if (pending_vec < max_bits) { | |
66fd3f7f | 5122 | kvm_queue_interrupt(vcpu, pending_vec, false); |
923c61bb GN |
5123 | pr_debug("Set back pending irq %d\n", pending_vec); |
5124 | if (irqchip_in_kernel(vcpu->kvm)) | |
5125 | kvm_pic_clear_isr_ack(vcpu->kvm); | |
b6c7a5dc HB |
5126 | } |
5127 | ||
3e6e0aab GT |
5128 | kvm_set_segment(vcpu, &sregs->cs, VCPU_SREG_CS); |
5129 | kvm_set_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
5130 | kvm_set_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
5131 | kvm_set_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
5132 | kvm_set_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
5133 | kvm_set_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
b6c7a5dc | 5134 | |
3e6e0aab GT |
5135 | kvm_set_segment(vcpu, &sregs->tr, VCPU_SREG_TR); |
5136 | kvm_set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
b6c7a5dc | 5137 | |
5f0269f5 ME |
5138 | update_cr8_intercept(vcpu); |
5139 | ||
9c3e4aab | 5140 | /* Older userspace won't unhalt the vcpu on reset. */ |
c5af89b6 | 5141 | if (kvm_vcpu_is_bsp(vcpu) && kvm_rip_read(vcpu) == 0xfff0 && |
9c3e4aab | 5142 | sregs->cs.selector == 0xf000 && sregs->cs.base == 0xffff0000 && |
3eeb3288 | 5143 | !is_protmode(vcpu)) |
9c3e4aab MT |
5144 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
5145 | ||
b6c7a5dc HB |
5146 | return 0; |
5147 | } | |
5148 | ||
d0bfb940 JK |
5149 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
5150 | struct kvm_guest_debug *dbg) | |
b6c7a5dc | 5151 | { |
355be0b9 | 5152 | unsigned long rflags; |
ae675ef0 | 5153 | int i, r; |
b6c7a5dc | 5154 | |
4f926bf2 JK |
5155 | if (dbg->control & (KVM_GUESTDBG_INJECT_DB | KVM_GUESTDBG_INJECT_BP)) { |
5156 | r = -EBUSY; | |
5157 | if (vcpu->arch.exception.pending) | |
2122ff5e | 5158 | goto out; |
4f926bf2 JK |
5159 | if (dbg->control & KVM_GUESTDBG_INJECT_DB) |
5160 | kvm_queue_exception(vcpu, DB_VECTOR); | |
5161 | else | |
5162 | kvm_queue_exception(vcpu, BP_VECTOR); | |
5163 | } | |
5164 | ||
91586a3b JK |
5165 | /* |
5166 | * Read rflags as long as potentially injected trace flags are still | |
5167 | * filtered out. | |
5168 | */ | |
5169 | rflags = kvm_get_rflags(vcpu); | |
355be0b9 JK |
5170 | |
5171 | vcpu->guest_debug = dbg->control; | |
5172 | if (!(vcpu->guest_debug & KVM_GUESTDBG_ENABLE)) | |
5173 | vcpu->guest_debug = 0; | |
5174 | ||
5175 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) { | |
ae675ef0 JK |
5176 | for (i = 0; i < KVM_NR_DB_REGS; ++i) |
5177 | vcpu->arch.eff_db[i] = dbg->arch.debugreg[i]; | |
5178 | vcpu->arch.switch_db_regs = | |
5179 | (dbg->arch.debugreg[7] & DR7_BP_EN_MASK); | |
5180 | } else { | |
5181 | for (i = 0; i < KVM_NR_DB_REGS; i++) | |
5182 | vcpu->arch.eff_db[i] = vcpu->arch.db[i]; | |
5183 | vcpu->arch.switch_db_regs = (vcpu->arch.dr7 & DR7_BP_EN_MASK); | |
5184 | } | |
5185 | ||
f92653ee JK |
5186 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) |
5187 | vcpu->arch.singlestep_rip = kvm_rip_read(vcpu) + | |
5188 | get_segment_base(vcpu, VCPU_SREG_CS); | |
94fe45da | 5189 | |
91586a3b JK |
5190 | /* |
5191 | * Trigger an rflags update that will inject or remove the trace | |
5192 | * flags. | |
5193 | */ | |
5194 | kvm_set_rflags(vcpu, rflags); | |
b6c7a5dc | 5195 | |
355be0b9 | 5196 | kvm_x86_ops->set_guest_debug(vcpu, dbg); |
b6c7a5dc | 5197 | |
4f926bf2 | 5198 | r = 0; |
d0bfb940 | 5199 | |
2122ff5e | 5200 | out: |
b6c7a5dc HB |
5201 | |
5202 | return r; | |
5203 | } | |
5204 | ||
8b006791 ZX |
5205 | /* |
5206 | * Translate a guest virtual address to a guest physical address. | |
5207 | */ | |
5208 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, | |
5209 | struct kvm_translation *tr) | |
5210 | { | |
5211 | unsigned long vaddr = tr->linear_address; | |
5212 | gpa_t gpa; | |
f656ce01 | 5213 | int idx; |
8b006791 | 5214 | |
f656ce01 | 5215 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
1871c602 | 5216 | gpa = kvm_mmu_gva_to_gpa_system(vcpu, vaddr, NULL); |
f656ce01 | 5217 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
8b006791 ZX |
5218 | tr->physical_address = gpa; |
5219 | tr->valid = gpa != UNMAPPED_GVA; | |
5220 | tr->writeable = 1; | |
5221 | tr->usermode = 0; | |
8b006791 ZX |
5222 | |
5223 | return 0; | |
5224 | } | |
5225 | ||
d0752060 HB |
5226 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) |
5227 | { | |
98918833 SY |
5228 | struct i387_fxsave_struct *fxsave = |
5229 | &vcpu->arch.guest_fpu.state->fxsave; | |
d0752060 | 5230 | |
d0752060 HB |
5231 | memcpy(fpu->fpr, fxsave->st_space, 128); |
5232 | fpu->fcw = fxsave->cwd; | |
5233 | fpu->fsw = fxsave->swd; | |
5234 | fpu->ftwx = fxsave->twd; | |
5235 | fpu->last_opcode = fxsave->fop; | |
5236 | fpu->last_ip = fxsave->rip; | |
5237 | fpu->last_dp = fxsave->rdp; | |
5238 | memcpy(fpu->xmm, fxsave->xmm_space, sizeof fxsave->xmm_space); | |
5239 | ||
d0752060 HB |
5240 | return 0; |
5241 | } | |
5242 | ||
5243 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
5244 | { | |
98918833 SY |
5245 | struct i387_fxsave_struct *fxsave = |
5246 | &vcpu->arch.guest_fpu.state->fxsave; | |
d0752060 | 5247 | |
d0752060 HB |
5248 | memcpy(fxsave->st_space, fpu->fpr, 128); |
5249 | fxsave->cwd = fpu->fcw; | |
5250 | fxsave->swd = fpu->fsw; | |
5251 | fxsave->twd = fpu->ftwx; | |
5252 | fxsave->fop = fpu->last_opcode; | |
5253 | fxsave->rip = fpu->last_ip; | |
5254 | fxsave->rdp = fpu->last_dp; | |
5255 | memcpy(fxsave->xmm_space, fpu->xmm, sizeof fxsave->xmm_space); | |
5256 | ||
d0752060 HB |
5257 | return 0; |
5258 | } | |
5259 | ||
10ab25cd | 5260 | int fx_init(struct kvm_vcpu *vcpu) |
d0752060 | 5261 | { |
10ab25cd JK |
5262 | int err; |
5263 | ||
5264 | err = fpu_alloc(&vcpu->arch.guest_fpu); | |
5265 | if (err) | |
5266 | return err; | |
5267 | ||
98918833 | 5268 | fpu_finit(&vcpu->arch.guest_fpu); |
d0752060 | 5269 | |
2acf923e DC |
5270 | /* |
5271 | * Ensure guest xcr0 is valid for loading | |
5272 | */ | |
5273 | vcpu->arch.xcr0 = XSTATE_FP; | |
5274 | ||
ad312c7c | 5275 | vcpu->arch.cr0 |= X86_CR0_ET; |
10ab25cd JK |
5276 | |
5277 | return 0; | |
d0752060 HB |
5278 | } |
5279 | EXPORT_SYMBOL_GPL(fx_init); | |
5280 | ||
98918833 SY |
5281 | static void fx_free(struct kvm_vcpu *vcpu) |
5282 | { | |
5283 | fpu_free(&vcpu->arch.guest_fpu); | |
5284 | } | |
5285 | ||
d0752060 HB |
5286 | void kvm_load_guest_fpu(struct kvm_vcpu *vcpu) |
5287 | { | |
2608d7a1 | 5288 | if (vcpu->guest_fpu_loaded) |
d0752060 HB |
5289 | return; |
5290 | ||
2acf923e DC |
5291 | /* |
5292 | * Restore all possible states in the guest, | |
5293 | * and assume host would use all available bits. | |
5294 | * Guest xcr0 would be loaded later. | |
5295 | */ | |
5296 | kvm_put_guest_xcr0(vcpu); | |
d0752060 | 5297 | vcpu->guest_fpu_loaded = 1; |
7cf30855 | 5298 | unlazy_fpu(current); |
98918833 | 5299 | fpu_restore_checking(&vcpu->arch.guest_fpu); |
0c04851c | 5300 | trace_kvm_fpu(1); |
d0752060 | 5301 | } |
d0752060 HB |
5302 | |
5303 | void kvm_put_guest_fpu(struct kvm_vcpu *vcpu) | |
5304 | { | |
2acf923e DC |
5305 | kvm_put_guest_xcr0(vcpu); |
5306 | ||
d0752060 HB |
5307 | if (!vcpu->guest_fpu_loaded) |
5308 | return; | |
5309 | ||
5310 | vcpu->guest_fpu_loaded = 0; | |
98918833 | 5311 | fpu_save_init(&vcpu->arch.guest_fpu); |
f096ed85 | 5312 | ++vcpu->stat.fpu_reload; |
a8eeb04a | 5313 | kvm_make_request(KVM_REQ_DEACTIVATE_FPU, vcpu); |
0c04851c | 5314 | trace_kvm_fpu(0); |
d0752060 | 5315 | } |
e9b11c17 ZX |
5316 | |
5317 | void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu) | |
5318 | { | |
7f1ea208 JR |
5319 | if (vcpu->arch.time_page) { |
5320 | kvm_release_page_dirty(vcpu->arch.time_page); | |
5321 | vcpu->arch.time_page = NULL; | |
5322 | } | |
5323 | ||
f5f48ee1 | 5324 | free_cpumask_var(vcpu->arch.wbinvd_dirty_mask); |
98918833 | 5325 | fx_free(vcpu); |
e9b11c17 ZX |
5326 | kvm_x86_ops->vcpu_free(vcpu); |
5327 | } | |
5328 | ||
5329 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, | |
5330 | unsigned int id) | |
5331 | { | |
26e5215f AK |
5332 | return kvm_x86_ops->vcpu_create(kvm, id); |
5333 | } | |
e9b11c17 | 5334 | |
26e5215f AK |
5335 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) |
5336 | { | |
5337 | int r; | |
e9b11c17 | 5338 | |
0bed3b56 | 5339 | vcpu->arch.mtrr_state.have_fixed = 1; |
e9b11c17 ZX |
5340 | vcpu_load(vcpu); |
5341 | r = kvm_arch_vcpu_reset(vcpu); | |
5342 | if (r == 0) | |
5343 | r = kvm_mmu_setup(vcpu); | |
5344 | vcpu_put(vcpu); | |
5345 | if (r < 0) | |
5346 | goto free_vcpu; | |
5347 | ||
26e5215f | 5348 | return 0; |
e9b11c17 ZX |
5349 | free_vcpu: |
5350 | kvm_x86_ops->vcpu_free(vcpu); | |
26e5215f | 5351 | return r; |
e9b11c17 ZX |
5352 | } |
5353 | ||
d40ccc62 | 5354 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
e9b11c17 ZX |
5355 | { |
5356 | vcpu_load(vcpu); | |
5357 | kvm_mmu_unload(vcpu); | |
5358 | vcpu_put(vcpu); | |
5359 | ||
98918833 | 5360 | fx_free(vcpu); |
e9b11c17 ZX |
5361 | kvm_x86_ops->vcpu_free(vcpu); |
5362 | } | |
5363 | ||
5364 | int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu) | |
5365 | { | |
448fa4a9 JK |
5366 | vcpu->arch.nmi_pending = false; |
5367 | vcpu->arch.nmi_injected = false; | |
5368 | ||
42dbaa5a JK |
5369 | vcpu->arch.switch_db_regs = 0; |
5370 | memset(vcpu->arch.db, 0, sizeof(vcpu->arch.db)); | |
5371 | vcpu->arch.dr6 = DR6_FIXED_1; | |
5372 | vcpu->arch.dr7 = DR7_FIXED_1; | |
5373 | ||
e9b11c17 ZX |
5374 | return kvm_x86_ops->vcpu_reset(vcpu); |
5375 | } | |
5376 | ||
10474ae8 | 5377 | int kvm_arch_hardware_enable(void *garbage) |
e9b11c17 | 5378 | { |
0cca7907 ZA |
5379 | /* |
5380 | * Since this may be called from a hotplug notifcation, | |
5381 | * we can't get the CPU frequency directly. | |
5382 | */ | |
5383 | if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) { | |
5384 | int cpu = raw_smp_processor_id(); | |
5385 | per_cpu(cpu_tsc_khz, cpu) = 0; | |
5386 | } | |
18863bdd AK |
5387 | |
5388 | kvm_shared_msr_cpu_online(); | |
5389 | ||
10474ae8 | 5390 | return kvm_x86_ops->hardware_enable(garbage); |
e9b11c17 ZX |
5391 | } |
5392 | ||
5393 | void kvm_arch_hardware_disable(void *garbage) | |
5394 | { | |
5395 | kvm_x86_ops->hardware_disable(garbage); | |
3548bab5 | 5396 | drop_user_return_notifiers(garbage); |
e9b11c17 ZX |
5397 | } |
5398 | ||
5399 | int kvm_arch_hardware_setup(void) | |
5400 | { | |
5401 | return kvm_x86_ops->hardware_setup(); | |
5402 | } | |
5403 | ||
5404 | void kvm_arch_hardware_unsetup(void) | |
5405 | { | |
5406 | kvm_x86_ops->hardware_unsetup(); | |
5407 | } | |
5408 | ||
5409 | void kvm_arch_check_processor_compat(void *rtn) | |
5410 | { | |
5411 | kvm_x86_ops->check_processor_compatibility(rtn); | |
5412 | } | |
5413 | ||
5414 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) | |
5415 | { | |
5416 | struct page *page; | |
5417 | struct kvm *kvm; | |
5418 | int r; | |
5419 | ||
5420 | BUG_ON(vcpu->kvm == NULL); | |
5421 | kvm = vcpu->kvm; | |
5422 | ||
ad312c7c | 5423 | vcpu->arch.mmu.root_hpa = INVALID_PAGE; |
c5af89b6 | 5424 | if (!irqchip_in_kernel(kvm) || kvm_vcpu_is_bsp(vcpu)) |
a4535290 | 5425 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
e9b11c17 | 5426 | else |
a4535290 | 5427 | vcpu->arch.mp_state = KVM_MP_STATE_UNINITIALIZED; |
e9b11c17 ZX |
5428 | |
5429 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
5430 | if (!page) { | |
5431 | r = -ENOMEM; | |
5432 | goto fail; | |
5433 | } | |
ad312c7c | 5434 | vcpu->arch.pio_data = page_address(page); |
e9b11c17 ZX |
5435 | |
5436 | r = kvm_mmu_create(vcpu); | |
5437 | if (r < 0) | |
5438 | goto fail_free_pio_data; | |
5439 | ||
5440 | if (irqchip_in_kernel(kvm)) { | |
5441 | r = kvm_create_lapic(vcpu); | |
5442 | if (r < 0) | |
5443 | goto fail_mmu_destroy; | |
5444 | } | |
5445 | ||
890ca9ae HY |
5446 | vcpu->arch.mce_banks = kzalloc(KVM_MAX_MCE_BANKS * sizeof(u64) * 4, |
5447 | GFP_KERNEL); | |
5448 | if (!vcpu->arch.mce_banks) { | |
5449 | r = -ENOMEM; | |
443c39bc | 5450 | goto fail_free_lapic; |
890ca9ae HY |
5451 | } |
5452 | vcpu->arch.mcg_cap = KVM_MAX_MCE_BANKS; | |
5453 | ||
f5f48ee1 SY |
5454 | if (!zalloc_cpumask_var(&vcpu->arch.wbinvd_dirty_mask, GFP_KERNEL)) |
5455 | goto fail_free_mce_banks; | |
5456 | ||
e9b11c17 | 5457 | return 0; |
f5f48ee1 SY |
5458 | fail_free_mce_banks: |
5459 | kfree(vcpu->arch.mce_banks); | |
443c39bc WY |
5460 | fail_free_lapic: |
5461 | kvm_free_lapic(vcpu); | |
e9b11c17 ZX |
5462 | fail_mmu_destroy: |
5463 | kvm_mmu_destroy(vcpu); | |
5464 | fail_free_pio_data: | |
ad312c7c | 5465 | free_page((unsigned long)vcpu->arch.pio_data); |
e9b11c17 ZX |
5466 | fail: |
5467 | return r; | |
5468 | } | |
5469 | ||
5470 | void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) | |
5471 | { | |
f656ce01 MT |
5472 | int idx; |
5473 | ||
36cb93fd | 5474 | kfree(vcpu->arch.mce_banks); |
e9b11c17 | 5475 | kvm_free_lapic(vcpu); |
f656ce01 | 5476 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
e9b11c17 | 5477 | kvm_mmu_destroy(vcpu); |
f656ce01 | 5478 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
ad312c7c | 5479 | free_page((unsigned long)vcpu->arch.pio_data); |
e9b11c17 | 5480 | } |
d19a9cd2 ZX |
5481 | |
5482 | struct kvm *kvm_arch_create_vm(void) | |
5483 | { | |
5484 | struct kvm *kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL); | |
5485 | ||
5486 | if (!kvm) | |
5487 | return ERR_PTR(-ENOMEM); | |
5488 | ||
f05e70ac | 5489 | INIT_LIST_HEAD(&kvm->arch.active_mmu_pages); |
4d5c5d0f | 5490 | INIT_LIST_HEAD(&kvm->arch.assigned_dev_head); |
d19a9cd2 | 5491 | |
5550af4d SY |
5492 | /* Reserve bit 0 of irq_sources_bitmap for userspace irq source */ |
5493 | set_bit(KVM_USERSPACE_IRQ_SOURCE_ID, &kvm->arch.irq_sources_bitmap); | |
5494 | ||
53f658b3 MT |
5495 | rdtscll(kvm->arch.vm_init_tsc); |
5496 | ||
d19a9cd2 ZX |
5497 | return kvm; |
5498 | } | |
5499 | ||
5500 | static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu) | |
5501 | { | |
5502 | vcpu_load(vcpu); | |
5503 | kvm_mmu_unload(vcpu); | |
5504 | vcpu_put(vcpu); | |
5505 | } | |
5506 | ||
5507 | static void kvm_free_vcpus(struct kvm *kvm) | |
5508 | { | |
5509 | unsigned int i; | |
988a2cae | 5510 | struct kvm_vcpu *vcpu; |
d19a9cd2 ZX |
5511 | |
5512 | /* | |
5513 | * Unpin any mmu pages first. | |
5514 | */ | |
988a2cae GN |
5515 | kvm_for_each_vcpu(i, vcpu, kvm) |
5516 | kvm_unload_vcpu_mmu(vcpu); | |
5517 | kvm_for_each_vcpu(i, vcpu, kvm) | |
5518 | kvm_arch_vcpu_free(vcpu); | |
5519 | ||
5520 | mutex_lock(&kvm->lock); | |
5521 | for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) | |
5522 | kvm->vcpus[i] = NULL; | |
d19a9cd2 | 5523 | |
988a2cae GN |
5524 | atomic_set(&kvm->online_vcpus, 0); |
5525 | mutex_unlock(&kvm->lock); | |
d19a9cd2 ZX |
5526 | } |
5527 | ||
ad8ba2cd SY |
5528 | void kvm_arch_sync_events(struct kvm *kvm) |
5529 | { | |
ba4cef31 | 5530 | kvm_free_all_assigned_devices(kvm); |
aea924f6 | 5531 | kvm_free_pit(kvm); |
ad8ba2cd SY |
5532 | } |
5533 | ||
d19a9cd2 ZX |
5534 | void kvm_arch_destroy_vm(struct kvm *kvm) |
5535 | { | |
6eb55818 | 5536 | kvm_iommu_unmap_guest(kvm); |
d7deeeb0 ZX |
5537 | kfree(kvm->arch.vpic); |
5538 | kfree(kvm->arch.vioapic); | |
d19a9cd2 ZX |
5539 | kvm_free_vcpus(kvm); |
5540 | kvm_free_physmem(kvm); | |
3d45830c AK |
5541 | if (kvm->arch.apic_access_page) |
5542 | put_page(kvm->arch.apic_access_page); | |
b7ebfb05 SY |
5543 | if (kvm->arch.ept_identity_pagetable) |
5544 | put_page(kvm->arch.ept_identity_pagetable); | |
64749204 | 5545 | cleanup_srcu_struct(&kvm->srcu); |
d19a9cd2 ZX |
5546 | kfree(kvm); |
5547 | } | |
0de10343 | 5548 | |
f7784b8e MT |
5549 | int kvm_arch_prepare_memory_region(struct kvm *kvm, |
5550 | struct kvm_memory_slot *memslot, | |
0de10343 | 5551 | struct kvm_memory_slot old, |
f7784b8e | 5552 | struct kvm_userspace_memory_region *mem, |
0de10343 ZX |
5553 | int user_alloc) |
5554 | { | |
f7784b8e | 5555 | int npages = memslot->npages; |
7ac77099 AK |
5556 | int map_flags = MAP_PRIVATE | MAP_ANONYMOUS; |
5557 | ||
5558 | /* Prevent internal slot pages from being moved by fork()/COW. */ | |
5559 | if (memslot->id >= KVM_MEMORY_SLOTS) | |
5560 | map_flags = MAP_SHARED | MAP_ANONYMOUS; | |
0de10343 ZX |
5561 | |
5562 | /*To keep backward compatibility with older userspace, | |
5563 | *x86 needs to hanlde !user_alloc case. | |
5564 | */ | |
5565 | if (!user_alloc) { | |
5566 | if (npages && !old.rmap) { | |
604b38ac AA |
5567 | unsigned long userspace_addr; |
5568 | ||
72dc67a6 | 5569 | down_write(¤t->mm->mmap_sem); |
604b38ac AA |
5570 | userspace_addr = do_mmap(NULL, 0, |
5571 | npages * PAGE_SIZE, | |
5572 | PROT_READ | PROT_WRITE, | |
7ac77099 | 5573 | map_flags, |
604b38ac | 5574 | 0); |
72dc67a6 | 5575 | up_write(¤t->mm->mmap_sem); |
0de10343 | 5576 | |
604b38ac AA |
5577 | if (IS_ERR((void *)userspace_addr)) |
5578 | return PTR_ERR((void *)userspace_addr); | |
5579 | ||
604b38ac | 5580 | memslot->userspace_addr = userspace_addr; |
0de10343 ZX |
5581 | } |
5582 | } | |
5583 | ||
f7784b8e MT |
5584 | |
5585 | return 0; | |
5586 | } | |
5587 | ||
5588 | void kvm_arch_commit_memory_region(struct kvm *kvm, | |
5589 | struct kvm_userspace_memory_region *mem, | |
5590 | struct kvm_memory_slot old, | |
5591 | int user_alloc) | |
5592 | { | |
5593 | ||
5594 | int npages = mem->memory_size >> PAGE_SHIFT; | |
5595 | ||
5596 | if (!user_alloc && !old.user_alloc && old.rmap && !npages) { | |
5597 | int ret; | |
5598 | ||
5599 | down_write(¤t->mm->mmap_sem); | |
5600 | ret = do_munmap(current->mm, old.userspace_addr, | |
5601 | old.npages * PAGE_SIZE); | |
5602 | up_write(¤t->mm->mmap_sem); | |
5603 | if (ret < 0) | |
5604 | printk(KERN_WARNING | |
5605 | "kvm_vm_ioctl_set_memory_region: " | |
5606 | "failed to munmap memory\n"); | |
5607 | } | |
5608 | ||
7c8a83b7 | 5609 | spin_lock(&kvm->mmu_lock); |
f05e70ac | 5610 | if (!kvm->arch.n_requested_mmu_pages) { |
0de10343 ZX |
5611 | unsigned int nr_mmu_pages = kvm_mmu_calculate_mmu_pages(kvm); |
5612 | kvm_mmu_change_mmu_pages(kvm, nr_mmu_pages); | |
5613 | } | |
5614 | ||
5615 | kvm_mmu_slot_remove_write_access(kvm, mem->slot); | |
7c8a83b7 | 5616 | spin_unlock(&kvm->mmu_lock); |
0de10343 | 5617 | } |
1d737c8a | 5618 | |
34d4cb8f MT |
5619 | void kvm_arch_flush_shadow(struct kvm *kvm) |
5620 | { | |
5621 | kvm_mmu_zap_all(kvm); | |
8986ecc0 | 5622 | kvm_reload_remote_mmus(kvm); |
34d4cb8f MT |
5623 | } |
5624 | ||
1d737c8a ZX |
5625 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
5626 | { | |
a4535290 | 5627 | return vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE |
a1b37100 GN |
5628 | || vcpu->arch.mp_state == KVM_MP_STATE_SIPI_RECEIVED |
5629 | || vcpu->arch.nmi_pending || | |
5630 | (kvm_arch_interrupt_allowed(vcpu) && | |
5631 | kvm_cpu_has_interrupt(vcpu)); | |
1d737c8a | 5632 | } |
5736199a | 5633 | |
5736199a ZX |
5634 | void kvm_vcpu_kick(struct kvm_vcpu *vcpu) |
5635 | { | |
32f88400 MT |
5636 | int me; |
5637 | int cpu = vcpu->cpu; | |
5736199a ZX |
5638 | |
5639 | if (waitqueue_active(&vcpu->wq)) { | |
5640 | wake_up_interruptible(&vcpu->wq); | |
5641 | ++vcpu->stat.halt_wakeup; | |
5642 | } | |
32f88400 MT |
5643 | |
5644 | me = get_cpu(); | |
5645 | if (cpu != me && (unsigned)cpu < nr_cpu_ids && cpu_online(cpu)) | |
d94e1dc9 | 5646 | if (atomic_xchg(&vcpu->guest_mode, 0)) |
32f88400 | 5647 | smp_send_reschedule(cpu); |
e9571ed5 | 5648 | put_cpu(); |
5736199a | 5649 | } |
78646121 GN |
5650 | |
5651 | int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu) | |
5652 | { | |
5653 | return kvm_x86_ops->interrupt_allowed(vcpu); | |
5654 | } | |
229456fc | 5655 | |
f92653ee JK |
5656 | bool kvm_is_linear_rip(struct kvm_vcpu *vcpu, unsigned long linear_rip) |
5657 | { | |
5658 | unsigned long current_rip = kvm_rip_read(vcpu) + | |
5659 | get_segment_base(vcpu, VCPU_SREG_CS); | |
5660 | ||
5661 | return current_rip == linear_rip; | |
5662 | } | |
5663 | EXPORT_SYMBOL_GPL(kvm_is_linear_rip); | |
5664 | ||
94fe45da JK |
5665 | unsigned long kvm_get_rflags(struct kvm_vcpu *vcpu) |
5666 | { | |
5667 | unsigned long rflags; | |
5668 | ||
5669 | rflags = kvm_x86_ops->get_rflags(vcpu); | |
5670 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) | |
c310bac5 | 5671 | rflags &= ~X86_EFLAGS_TF; |
94fe45da JK |
5672 | return rflags; |
5673 | } | |
5674 | EXPORT_SYMBOL_GPL(kvm_get_rflags); | |
5675 | ||
5676 | void kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags) | |
5677 | { | |
5678 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP && | |
f92653ee | 5679 | kvm_is_linear_rip(vcpu, vcpu->arch.singlestep_rip)) |
c310bac5 | 5680 | rflags |= X86_EFLAGS_TF; |
94fe45da JK |
5681 | kvm_x86_ops->set_rflags(vcpu, rflags); |
5682 | } | |
5683 | EXPORT_SYMBOL_GPL(kvm_set_rflags); | |
5684 | ||
229456fc MT |
5685 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_exit); |
5686 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_inj_virq); | |
5687 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_page_fault); | |
5688 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_msr); | |
5689 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_cr); | |
0ac406de | 5690 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmrun); |
d8cabddf | 5691 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit); |
17897f36 | 5692 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit_inject); |
236649de | 5693 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intr_vmexit); |
ec1ff790 | 5694 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_invlpga); |
532a46b9 | 5695 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_skinit); |
2e554e8d | 5696 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intercepts); |