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 | |
043405e1 CO |
9 | * |
10 | * Authors: | |
11 | * Avi Kivity <avi@qumranet.com> | |
12 | * Yaniv Kamay <yaniv@qumranet.com> | |
4d5c5d0f BAY |
13 | * Amit Shah <amit.shah@qumranet.com> |
14 | * Ben-Ami Yassour <benami@il.ibm.com> | |
043405e1 CO |
15 | * |
16 | * This work is licensed under the terms of the GNU GPL, version 2. See | |
17 | * the COPYING file in the top-level directory. | |
18 | * | |
19 | */ | |
20 | ||
edf88417 | 21 | #include <linux/kvm_host.h> |
313a3dc7 | 22 | #include "irq.h" |
1d737c8a | 23 | #include "mmu.h" |
7837699f | 24 | #include "i8254.h" |
37817f29 | 25 | #include "tss.h" |
5fdbf976 | 26 | #include "kvm_cache_regs.h" |
26eef70c | 27 | #include "x86.h" |
313a3dc7 | 28 | |
18068523 | 29 | #include <linux/clocksource.h> |
4d5c5d0f | 30 | #include <linux/interrupt.h> |
313a3dc7 CO |
31 | #include <linux/kvm.h> |
32 | #include <linux/fs.h> | |
33 | #include <linux/vmalloc.h> | |
5fb76f9b | 34 | #include <linux/module.h> |
0de10343 | 35 | #include <linux/mman.h> |
2bacc55c | 36 | #include <linux/highmem.h> |
19de40a8 | 37 | #include <linux/iommu.h> |
62c476c7 | 38 | #include <linux/intel-iommu.h> |
c8076604 | 39 | #include <linux/cpufreq.h> |
18863bdd | 40 | #include <linux/user-return-notifier.h> |
a983fb23 | 41 | #include <linux/srcu.h> |
5a0e3ad6 | 42 | #include <linux/slab.h> |
ff9d07a0 | 43 | #include <linux/perf_event.h> |
aec51dc4 | 44 | #include <trace/events/kvm.h> |
2ed152af | 45 | |
229456fc MT |
46 | #define CREATE_TRACE_POINTS |
47 | #include "trace.h" | |
043405e1 | 48 | |
24f1e32c | 49 | #include <asm/debugreg.h> |
043405e1 | 50 | #include <asm/uaccess.h> |
d825ed0a | 51 | #include <asm/msr.h> |
a5f61300 | 52 | #include <asm/desc.h> |
0bed3b56 | 53 | #include <asm/mtrr.h> |
890ca9ae | 54 | #include <asm/mce.h> |
043405e1 | 55 | |
313a3dc7 | 56 | #define MAX_IO_MSRS 256 |
a03490ed CO |
57 | #define CR0_RESERVED_BITS \ |
58 | (~(unsigned long)(X86_CR0_PE | X86_CR0_MP | X86_CR0_EM | X86_CR0_TS \ | |
59 | | X86_CR0_ET | X86_CR0_NE | X86_CR0_WP | X86_CR0_AM \ | |
60 | | X86_CR0_NW | X86_CR0_CD | X86_CR0_PG)) | |
61 | #define CR4_RESERVED_BITS \ | |
62 | (~(unsigned long)(X86_CR4_VME | X86_CR4_PVI | X86_CR4_TSD | X86_CR4_DE\ | |
63 | | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_MCE \ | |
64 | | X86_CR4_PGE | X86_CR4_PCE | X86_CR4_OSFXSR \ | |
65 | | X86_CR4_OSXMMEXCPT | X86_CR4_VMXE)) | |
66 | ||
67 | #define CR8_RESERVED_BITS (~(unsigned long)X86_CR8_TPR) | |
890ca9ae HY |
68 | |
69 | #define KVM_MAX_MCE_BANKS 32 | |
70 | #define KVM_MCE_CAP_SUPPORTED MCG_CTL_P | |
71 | ||
50a37eb4 JR |
72 | /* EFER defaults: |
73 | * - enable syscall per default because its emulated by KVM | |
74 | * - enable LME and LMA per default on 64 bit KVM | |
75 | */ | |
76 | #ifdef CONFIG_X86_64 | |
77 | static u64 __read_mostly efer_reserved_bits = 0xfffffffffffffafeULL; | |
78 | #else | |
79 | static u64 __read_mostly efer_reserved_bits = 0xfffffffffffffffeULL; | |
80 | #endif | |
313a3dc7 | 81 | |
ba1389b7 AK |
82 | #define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM |
83 | #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU | |
417bc304 | 84 | |
cb142eb7 | 85 | static void update_cr8_intercept(struct kvm_vcpu *vcpu); |
674eea0f AK |
86 | static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2 *cpuid, |
87 | struct kvm_cpuid_entry2 __user *entries); | |
88 | ||
97896d04 | 89 | struct kvm_x86_ops *kvm_x86_ops; |
5fdbf976 | 90 | EXPORT_SYMBOL_GPL(kvm_x86_ops); |
97896d04 | 91 | |
ed85c068 AP |
92 | int ignore_msrs = 0; |
93 | module_param_named(ignore_msrs, ignore_msrs, bool, S_IRUGO | S_IWUSR); | |
94 | ||
18863bdd AK |
95 | #define KVM_NR_SHARED_MSRS 16 |
96 | ||
97 | struct kvm_shared_msrs_global { | |
98 | int nr; | |
2bf78fa7 | 99 | u32 msrs[KVM_NR_SHARED_MSRS]; |
18863bdd AK |
100 | }; |
101 | ||
102 | struct kvm_shared_msrs { | |
103 | struct user_return_notifier urn; | |
104 | bool registered; | |
2bf78fa7 SY |
105 | struct kvm_shared_msr_values { |
106 | u64 host; | |
107 | u64 curr; | |
108 | } values[KVM_NR_SHARED_MSRS]; | |
18863bdd AK |
109 | }; |
110 | ||
111 | static struct kvm_shared_msrs_global __read_mostly shared_msrs_global; | |
112 | static DEFINE_PER_CPU(struct kvm_shared_msrs, shared_msrs); | |
113 | ||
417bc304 | 114 | struct kvm_stats_debugfs_item debugfs_entries[] = { |
ba1389b7 AK |
115 | { "pf_fixed", VCPU_STAT(pf_fixed) }, |
116 | { "pf_guest", VCPU_STAT(pf_guest) }, | |
117 | { "tlb_flush", VCPU_STAT(tlb_flush) }, | |
118 | { "invlpg", VCPU_STAT(invlpg) }, | |
119 | { "exits", VCPU_STAT(exits) }, | |
120 | { "io_exits", VCPU_STAT(io_exits) }, | |
121 | { "mmio_exits", VCPU_STAT(mmio_exits) }, | |
122 | { "signal_exits", VCPU_STAT(signal_exits) }, | |
123 | { "irq_window", VCPU_STAT(irq_window_exits) }, | |
f08864b4 | 124 | { "nmi_window", VCPU_STAT(nmi_window_exits) }, |
ba1389b7 AK |
125 | { "halt_exits", VCPU_STAT(halt_exits) }, |
126 | { "halt_wakeup", VCPU_STAT(halt_wakeup) }, | |
f11c3a8d | 127 | { "hypercalls", VCPU_STAT(hypercalls) }, |
ba1389b7 AK |
128 | { "request_irq", VCPU_STAT(request_irq_exits) }, |
129 | { "irq_exits", VCPU_STAT(irq_exits) }, | |
130 | { "host_state_reload", VCPU_STAT(host_state_reload) }, | |
131 | { "efer_reload", VCPU_STAT(efer_reload) }, | |
132 | { "fpu_reload", VCPU_STAT(fpu_reload) }, | |
133 | { "insn_emulation", VCPU_STAT(insn_emulation) }, | |
134 | { "insn_emulation_fail", VCPU_STAT(insn_emulation_fail) }, | |
fa89a817 | 135 | { "irq_injections", VCPU_STAT(irq_injections) }, |
c4abb7c9 | 136 | { "nmi_injections", VCPU_STAT(nmi_injections) }, |
4cee5764 AK |
137 | { "mmu_shadow_zapped", VM_STAT(mmu_shadow_zapped) }, |
138 | { "mmu_pte_write", VM_STAT(mmu_pte_write) }, | |
139 | { "mmu_pte_updated", VM_STAT(mmu_pte_updated) }, | |
140 | { "mmu_pde_zapped", VM_STAT(mmu_pde_zapped) }, | |
141 | { "mmu_flooded", VM_STAT(mmu_flooded) }, | |
142 | { "mmu_recycled", VM_STAT(mmu_recycled) }, | |
dfc5aa00 | 143 | { "mmu_cache_miss", VM_STAT(mmu_cache_miss) }, |
4731d4c7 | 144 | { "mmu_unsync", VM_STAT(mmu_unsync) }, |
0f74a24c | 145 | { "remote_tlb_flush", VM_STAT(remote_tlb_flush) }, |
05da4558 | 146 | { "largepages", VM_STAT(lpages) }, |
417bc304 HB |
147 | { NULL } |
148 | }; | |
149 | ||
18863bdd AK |
150 | static void kvm_on_user_return(struct user_return_notifier *urn) |
151 | { | |
152 | unsigned slot; | |
18863bdd AK |
153 | struct kvm_shared_msrs *locals |
154 | = container_of(urn, struct kvm_shared_msrs, urn); | |
2bf78fa7 | 155 | struct kvm_shared_msr_values *values; |
18863bdd AK |
156 | |
157 | for (slot = 0; slot < shared_msrs_global.nr; ++slot) { | |
2bf78fa7 SY |
158 | values = &locals->values[slot]; |
159 | if (values->host != values->curr) { | |
160 | wrmsrl(shared_msrs_global.msrs[slot], values->host); | |
161 | values->curr = values->host; | |
18863bdd AK |
162 | } |
163 | } | |
164 | locals->registered = false; | |
165 | user_return_notifier_unregister(urn); | |
166 | } | |
167 | ||
2bf78fa7 | 168 | static void shared_msr_update(unsigned slot, u32 msr) |
18863bdd | 169 | { |
2bf78fa7 | 170 | struct kvm_shared_msrs *smsr; |
18863bdd AK |
171 | u64 value; |
172 | ||
2bf78fa7 SY |
173 | smsr = &__get_cpu_var(shared_msrs); |
174 | /* only read, and nobody should modify it at this time, | |
175 | * so don't need lock */ | |
176 | if (slot >= shared_msrs_global.nr) { | |
177 | printk(KERN_ERR "kvm: invalid MSR slot!"); | |
178 | return; | |
179 | } | |
180 | rdmsrl_safe(msr, &value); | |
181 | smsr->values[slot].host = value; | |
182 | smsr->values[slot].curr = value; | |
183 | } | |
184 | ||
185 | void kvm_define_shared_msr(unsigned slot, u32 msr) | |
186 | { | |
18863bdd AK |
187 | if (slot >= shared_msrs_global.nr) |
188 | shared_msrs_global.nr = slot + 1; | |
2bf78fa7 SY |
189 | shared_msrs_global.msrs[slot] = msr; |
190 | /* we need ensured the shared_msr_global have been updated */ | |
191 | smp_wmb(); | |
18863bdd AK |
192 | } |
193 | EXPORT_SYMBOL_GPL(kvm_define_shared_msr); | |
194 | ||
195 | static void kvm_shared_msr_cpu_online(void) | |
196 | { | |
197 | unsigned i; | |
18863bdd AK |
198 | |
199 | for (i = 0; i < shared_msrs_global.nr; ++i) | |
2bf78fa7 | 200 | shared_msr_update(i, shared_msrs_global.msrs[i]); |
18863bdd AK |
201 | } |
202 | ||
d5696725 | 203 | void kvm_set_shared_msr(unsigned slot, u64 value, u64 mask) |
18863bdd AK |
204 | { |
205 | struct kvm_shared_msrs *smsr = &__get_cpu_var(shared_msrs); | |
206 | ||
2bf78fa7 | 207 | if (((value ^ smsr->values[slot].curr) & mask) == 0) |
18863bdd | 208 | return; |
2bf78fa7 SY |
209 | smsr->values[slot].curr = value; |
210 | wrmsrl(shared_msrs_global.msrs[slot], value); | |
18863bdd AK |
211 | if (!smsr->registered) { |
212 | smsr->urn.on_user_return = kvm_on_user_return; | |
213 | user_return_notifier_register(&smsr->urn); | |
214 | smsr->registered = true; | |
215 | } | |
216 | } | |
217 | EXPORT_SYMBOL_GPL(kvm_set_shared_msr); | |
218 | ||
3548bab5 AK |
219 | static void drop_user_return_notifiers(void *ignore) |
220 | { | |
221 | struct kvm_shared_msrs *smsr = &__get_cpu_var(shared_msrs); | |
222 | ||
223 | if (smsr->registered) | |
224 | kvm_on_user_return(&smsr->urn); | |
225 | } | |
226 | ||
6866b83e CO |
227 | u64 kvm_get_apic_base(struct kvm_vcpu *vcpu) |
228 | { | |
229 | if (irqchip_in_kernel(vcpu->kvm)) | |
ad312c7c | 230 | return vcpu->arch.apic_base; |
6866b83e | 231 | else |
ad312c7c | 232 | return vcpu->arch.apic_base; |
6866b83e CO |
233 | } |
234 | EXPORT_SYMBOL_GPL(kvm_get_apic_base); | |
235 | ||
236 | void kvm_set_apic_base(struct kvm_vcpu *vcpu, u64 data) | |
237 | { | |
238 | /* TODO: reserve bits check */ | |
239 | if (irqchip_in_kernel(vcpu->kvm)) | |
240 | kvm_lapic_set_base(vcpu, data); | |
241 | else | |
ad312c7c | 242 | vcpu->arch.apic_base = data; |
6866b83e CO |
243 | } |
244 | EXPORT_SYMBOL_GPL(kvm_set_apic_base); | |
245 | ||
3fd28fce ED |
246 | #define EXCPT_BENIGN 0 |
247 | #define EXCPT_CONTRIBUTORY 1 | |
248 | #define EXCPT_PF 2 | |
249 | ||
250 | static int exception_class(int vector) | |
251 | { | |
252 | switch (vector) { | |
253 | case PF_VECTOR: | |
254 | return EXCPT_PF; | |
255 | case DE_VECTOR: | |
256 | case TS_VECTOR: | |
257 | case NP_VECTOR: | |
258 | case SS_VECTOR: | |
259 | case GP_VECTOR: | |
260 | return EXCPT_CONTRIBUTORY; | |
261 | default: | |
262 | break; | |
263 | } | |
264 | return EXCPT_BENIGN; | |
265 | } | |
266 | ||
267 | static void kvm_multiple_exception(struct kvm_vcpu *vcpu, | |
ce7ddec4 JR |
268 | unsigned nr, bool has_error, u32 error_code, |
269 | bool reinject) | |
3fd28fce ED |
270 | { |
271 | u32 prev_nr; | |
272 | int class1, class2; | |
273 | ||
274 | if (!vcpu->arch.exception.pending) { | |
275 | queue: | |
276 | vcpu->arch.exception.pending = true; | |
277 | vcpu->arch.exception.has_error_code = has_error; | |
278 | vcpu->arch.exception.nr = nr; | |
279 | vcpu->arch.exception.error_code = error_code; | |
3f0fd292 | 280 | vcpu->arch.exception.reinject = reinject; |
3fd28fce ED |
281 | return; |
282 | } | |
283 | ||
284 | /* to check exception */ | |
285 | prev_nr = vcpu->arch.exception.nr; | |
286 | if (prev_nr == DF_VECTOR) { | |
287 | /* triple fault -> shutdown */ | |
288 | set_bit(KVM_REQ_TRIPLE_FAULT, &vcpu->requests); | |
289 | return; | |
290 | } | |
291 | class1 = exception_class(prev_nr); | |
292 | class2 = exception_class(nr); | |
293 | if ((class1 == EXCPT_CONTRIBUTORY && class2 == EXCPT_CONTRIBUTORY) | |
294 | || (class1 == EXCPT_PF && class2 != EXCPT_BENIGN)) { | |
295 | /* generate double fault per SDM Table 5-5 */ | |
296 | vcpu->arch.exception.pending = true; | |
297 | vcpu->arch.exception.has_error_code = true; | |
298 | vcpu->arch.exception.nr = DF_VECTOR; | |
299 | vcpu->arch.exception.error_code = 0; | |
300 | } else | |
301 | /* replace previous exception with a new one in a hope | |
302 | that instruction re-execution will regenerate lost | |
303 | exception */ | |
304 | goto queue; | |
305 | } | |
306 | ||
298101da AK |
307 | void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr) |
308 | { | |
ce7ddec4 | 309 | kvm_multiple_exception(vcpu, nr, false, 0, false); |
298101da AK |
310 | } |
311 | EXPORT_SYMBOL_GPL(kvm_queue_exception); | |
312 | ||
ce7ddec4 JR |
313 | void kvm_requeue_exception(struct kvm_vcpu *vcpu, unsigned nr) |
314 | { | |
315 | kvm_multiple_exception(vcpu, nr, false, 0, true); | |
316 | } | |
317 | EXPORT_SYMBOL_GPL(kvm_requeue_exception); | |
318 | ||
c3c91fee AK |
319 | void kvm_inject_page_fault(struct kvm_vcpu *vcpu, unsigned long addr, |
320 | u32 error_code) | |
321 | { | |
322 | ++vcpu->stat.pf_guest; | |
ad312c7c | 323 | vcpu->arch.cr2 = addr; |
c3c91fee AK |
324 | kvm_queue_exception_e(vcpu, PF_VECTOR, error_code); |
325 | } | |
326 | ||
3419ffc8 SY |
327 | void kvm_inject_nmi(struct kvm_vcpu *vcpu) |
328 | { | |
329 | vcpu->arch.nmi_pending = 1; | |
330 | } | |
331 | EXPORT_SYMBOL_GPL(kvm_inject_nmi); | |
332 | ||
298101da AK |
333 | void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code) |
334 | { | |
ce7ddec4 | 335 | kvm_multiple_exception(vcpu, nr, true, error_code, false); |
298101da AK |
336 | } |
337 | EXPORT_SYMBOL_GPL(kvm_queue_exception_e); | |
338 | ||
ce7ddec4 JR |
339 | void kvm_requeue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code) |
340 | { | |
341 | kvm_multiple_exception(vcpu, nr, true, error_code, true); | |
342 | } | |
343 | EXPORT_SYMBOL_GPL(kvm_requeue_exception_e); | |
344 | ||
0a79b009 AK |
345 | /* |
346 | * Checks if cpl <= required_cpl; if true, return true. Otherwise queue | |
347 | * a #GP and return false. | |
348 | */ | |
349 | bool kvm_require_cpl(struct kvm_vcpu *vcpu, int required_cpl) | |
298101da | 350 | { |
0a79b009 AK |
351 | if (kvm_x86_ops->get_cpl(vcpu) <= required_cpl) |
352 | return true; | |
353 | kvm_queue_exception_e(vcpu, GP_VECTOR, 0); | |
354 | return false; | |
298101da | 355 | } |
0a79b009 | 356 | EXPORT_SYMBOL_GPL(kvm_require_cpl); |
298101da | 357 | |
a03490ed CO |
358 | /* |
359 | * Load the pae pdptrs. Return true is they are all valid. | |
360 | */ | |
361 | int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3) | |
362 | { | |
363 | gfn_t pdpt_gfn = cr3 >> PAGE_SHIFT; | |
364 | unsigned offset = ((cr3 & (PAGE_SIZE-1)) >> 5) << 2; | |
365 | int i; | |
366 | int ret; | |
ad312c7c | 367 | u64 pdpte[ARRAY_SIZE(vcpu->arch.pdptrs)]; |
a03490ed | 368 | |
a03490ed CO |
369 | ret = kvm_read_guest_page(vcpu->kvm, pdpt_gfn, pdpte, |
370 | offset * sizeof(u64), sizeof(pdpte)); | |
371 | if (ret < 0) { | |
372 | ret = 0; | |
373 | goto out; | |
374 | } | |
375 | for (i = 0; i < ARRAY_SIZE(pdpte); ++i) { | |
43a3795a | 376 | if (is_present_gpte(pdpte[i]) && |
20c466b5 | 377 | (pdpte[i] & vcpu->arch.mmu.rsvd_bits_mask[0][2])) { |
a03490ed CO |
378 | ret = 0; |
379 | goto out; | |
380 | } | |
381 | } | |
382 | ret = 1; | |
383 | ||
ad312c7c | 384 | memcpy(vcpu->arch.pdptrs, pdpte, sizeof(vcpu->arch.pdptrs)); |
6de4f3ad AK |
385 | __set_bit(VCPU_EXREG_PDPTR, |
386 | (unsigned long *)&vcpu->arch.regs_avail); | |
387 | __set_bit(VCPU_EXREG_PDPTR, | |
388 | (unsigned long *)&vcpu->arch.regs_dirty); | |
a03490ed | 389 | out: |
a03490ed CO |
390 | |
391 | return ret; | |
392 | } | |
cc4b6871 | 393 | EXPORT_SYMBOL_GPL(load_pdptrs); |
a03490ed | 394 | |
d835dfec AK |
395 | static bool pdptrs_changed(struct kvm_vcpu *vcpu) |
396 | { | |
ad312c7c | 397 | u64 pdpte[ARRAY_SIZE(vcpu->arch.pdptrs)]; |
d835dfec AK |
398 | bool changed = true; |
399 | int r; | |
400 | ||
401 | if (is_long_mode(vcpu) || !is_pae(vcpu)) | |
402 | return false; | |
403 | ||
6de4f3ad AK |
404 | if (!test_bit(VCPU_EXREG_PDPTR, |
405 | (unsigned long *)&vcpu->arch.regs_avail)) | |
406 | return true; | |
407 | ||
ad312c7c | 408 | r = kvm_read_guest(vcpu->kvm, vcpu->arch.cr3 & ~31u, pdpte, sizeof(pdpte)); |
d835dfec AK |
409 | if (r < 0) |
410 | goto out; | |
ad312c7c | 411 | changed = memcmp(pdpte, vcpu->arch.pdptrs, sizeof(pdpte)) != 0; |
d835dfec | 412 | out: |
d835dfec AK |
413 | |
414 | return changed; | |
415 | } | |
416 | ||
2d3ad1f4 | 417 | void kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) |
a03490ed | 418 | { |
f9a48e6a AK |
419 | cr0 |= X86_CR0_ET; |
420 | ||
ab344828 GN |
421 | #ifdef CONFIG_X86_64 |
422 | if (cr0 & 0xffffffff00000000UL) { | |
c1a5d4f9 | 423 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
424 | return; |
425 | } | |
ab344828 GN |
426 | #endif |
427 | ||
428 | cr0 &= ~CR0_RESERVED_BITS; | |
a03490ed CO |
429 | |
430 | if ((cr0 & X86_CR0_NW) && !(cr0 & X86_CR0_CD)) { | |
c1a5d4f9 | 431 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
432 | return; |
433 | } | |
434 | ||
435 | if ((cr0 & X86_CR0_PG) && !(cr0 & X86_CR0_PE)) { | |
c1a5d4f9 | 436 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
437 | return; |
438 | } | |
439 | ||
440 | if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) { | |
441 | #ifdef CONFIG_X86_64 | |
f6801dff | 442 | if ((vcpu->arch.efer & EFER_LME)) { |
a03490ed CO |
443 | int cs_db, cs_l; |
444 | ||
445 | if (!is_pae(vcpu)) { | |
c1a5d4f9 | 446 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
447 | return; |
448 | } | |
449 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); | |
450 | if (cs_l) { | |
c1a5d4f9 | 451 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
452 | return; |
453 | ||
454 | } | |
455 | } else | |
456 | #endif | |
ad312c7c | 457 | if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->arch.cr3)) { |
c1a5d4f9 | 458 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
459 | return; |
460 | } | |
461 | ||
462 | } | |
463 | ||
464 | kvm_x86_ops->set_cr0(vcpu, cr0); | |
a03490ed | 465 | |
a03490ed | 466 | kvm_mmu_reset_context(vcpu); |
a03490ed CO |
467 | return; |
468 | } | |
2d3ad1f4 | 469 | EXPORT_SYMBOL_GPL(kvm_set_cr0); |
a03490ed | 470 | |
2d3ad1f4 | 471 | void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw) |
a03490ed | 472 | { |
4d4ec087 | 473 | kvm_set_cr0(vcpu, kvm_read_cr0_bits(vcpu, ~0x0ful) | (msw & 0x0f)); |
a03490ed | 474 | } |
2d3ad1f4 | 475 | EXPORT_SYMBOL_GPL(kvm_lmsw); |
a03490ed | 476 | |
2d3ad1f4 | 477 | void kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4) |
a03490ed | 478 | { |
fc78f519 | 479 | unsigned long old_cr4 = kvm_read_cr4(vcpu); |
a2edf57f AK |
480 | unsigned long pdptr_bits = X86_CR4_PGE | X86_CR4_PSE | X86_CR4_PAE; |
481 | ||
a03490ed | 482 | if (cr4 & CR4_RESERVED_BITS) { |
c1a5d4f9 | 483 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
484 | return; |
485 | } | |
486 | ||
487 | if (is_long_mode(vcpu)) { | |
488 | if (!(cr4 & X86_CR4_PAE)) { | |
c1a5d4f9 | 489 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
490 | return; |
491 | } | |
a2edf57f AK |
492 | } else if (is_paging(vcpu) && (cr4 & X86_CR4_PAE) |
493 | && ((cr4 ^ old_cr4) & pdptr_bits) | |
ad312c7c | 494 | && !load_pdptrs(vcpu, vcpu->arch.cr3)) { |
c1a5d4f9 | 495 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
496 | return; |
497 | } | |
498 | ||
499 | if (cr4 & X86_CR4_VMXE) { | |
c1a5d4f9 | 500 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
501 | return; |
502 | } | |
503 | kvm_x86_ops->set_cr4(vcpu, cr4); | |
ad312c7c | 504 | vcpu->arch.cr4 = cr4; |
a03490ed | 505 | kvm_mmu_reset_context(vcpu); |
a03490ed | 506 | } |
2d3ad1f4 | 507 | EXPORT_SYMBOL_GPL(kvm_set_cr4); |
a03490ed | 508 | |
2d3ad1f4 | 509 | void kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3) |
a03490ed | 510 | { |
ad312c7c | 511 | if (cr3 == vcpu->arch.cr3 && !pdptrs_changed(vcpu)) { |
0ba73cda | 512 | kvm_mmu_sync_roots(vcpu); |
d835dfec AK |
513 | kvm_mmu_flush_tlb(vcpu); |
514 | return; | |
515 | } | |
516 | ||
a03490ed CO |
517 | if (is_long_mode(vcpu)) { |
518 | if (cr3 & CR3_L_MODE_RESERVED_BITS) { | |
c1a5d4f9 | 519 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
520 | return; |
521 | } | |
522 | } else { | |
523 | if (is_pae(vcpu)) { | |
524 | if (cr3 & CR3_PAE_RESERVED_BITS) { | |
c1a5d4f9 | 525 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
526 | return; |
527 | } | |
528 | if (is_paging(vcpu) && !load_pdptrs(vcpu, cr3)) { | |
c1a5d4f9 | 529 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
530 | return; |
531 | } | |
532 | } | |
533 | /* | |
534 | * We don't check reserved bits in nonpae mode, because | |
535 | * this isn't enforced, and VMware depends on this. | |
536 | */ | |
537 | } | |
538 | ||
a03490ed CO |
539 | /* |
540 | * Does the new cr3 value map to physical memory? (Note, we | |
541 | * catch an invalid cr3 even in real-mode, because it would | |
542 | * cause trouble later on when we turn on paging anyway.) | |
543 | * | |
544 | * A real CPU would silently accept an invalid cr3 and would | |
545 | * attempt to use it - with largely undefined (and often hard | |
546 | * to debug) behavior on the guest side. | |
547 | */ | |
548 | if (unlikely(!gfn_to_memslot(vcpu->kvm, cr3 >> PAGE_SHIFT))) | |
c1a5d4f9 | 549 | kvm_inject_gp(vcpu, 0); |
a03490ed | 550 | else { |
ad312c7c ZX |
551 | vcpu->arch.cr3 = cr3; |
552 | vcpu->arch.mmu.new_cr3(vcpu); | |
a03490ed | 553 | } |
a03490ed | 554 | } |
2d3ad1f4 | 555 | EXPORT_SYMBOL_GPL(kvm_set_cr3); |
a03490ed | 556 | |
2d3ad1f4 | 557 | void kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8) |
a03490ed CO |
558 | { |
559 | if (cr8 & CR8_RESERVED_BITS) { | |
c1a5d4f9 | 560 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
561 | return; |
562 | } | |
563 | if (irqchip_in_kernel(vcpu->kvm)) | |
564 | kvm_lapic_set_tpr(vcpu, cr8); | |
565 | else | |
ad312c7c | 566 | vcpu->arch.cr8 = cr8; |
a03490ed | 567 | } |
2d3ad1f4 | 568 | EXPORT_SYMBOL_GPL(kvm_set_cr8); |
a03490ed | 569 | |
2d3ad1f4 | 570 | unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu) |
a03490ed CO |
571 | { |
572 | if (irqchip_in_kernel(vcpu->kvm)) | |
573 | return kvm_lapic_get_cr8(vcpu); | |
574 | else | |
ad312c7c | 575 | return vcpu->arch.cr8; |
a03490ed | 576 | } |
2d3ad1f4 | 577 | EXPORT_SYMBOL_GPL(kvm_get_cr8); |
a03490ed | 578 | |
020df079 GN |
579 | int kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val) |
580 | { | |
581 | switch (dr) { | |
582 | case 0 ... 3: | |
583 | vcpu->arch.db[dr] = val; | |
584 | if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)) | |
585 | vcpu->arch.eff_db[dr] = val; | |
586 | break; | |
587 | case 4: | |
588 | if (kvm_read_cr4_bits(vcpu, X86_CR4_DE)) { | |
589 | kvm_queue_exception(vcpu, UD_VECTOR); | |
590 | return 1; | |
591 | } | |
592 | /* fall through */ | |
593 | case 6: | |
594 | if (val & 0xffffffff00000000ULL) { | |
595 | kvm_inject_gp(vcpu, 0); | |
596 | return 1; | |
597 | } | |
598 | vcpu->arch.dr6 = (val & DR6_VOLATILE) | DR6_FIXED_1; | |
599 | break; | |
600 | case 5: | |
601 | if (kvm_read_cr4_bits(vcpu, X86_CR4_DE)) { | |
602 | kvm_queue_exception(vcpu, UD_VECTOR); | |
603 | return 1; | |
604 | } | |
605 | /* fall through */ | |
606 | default: /* 7 */ | |
607 | if (val & 0xffffffff00000000ULL) { | |
608 | kvm_inject_gp(vcpu, 0); | |
609 | return 1; | |
610 | } | |
611 | vcpu->arch.dr7 = (val & DR7_VOLATILE) | DR7_FIXED_1; | |
612 | if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)) { | |
613 | kvm_x86_ops->set_dr7(vcpu, vcpu->arch.dr7); | |
614 | vcpu->arch.switch_db_regs = (val & DR7_BP_EN_MASK); | |
615 | } | |
616 | break; | |
617 | } | |
618 | ||
619 | return 0; | |
620 | } | |
621 | EXPORT_SYMBOL_GPL(kvm_set_dr); | |
622 | ||
623 | int kvm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *val) | |
624 | { | |
625 | switch (dr) { | |
626 | case 0 ... 3: | |
627 | *val = vcpu->arch.db[dr]; | |
628 | break; | |
629 | case 4: | |
630 | if (kvm_read_cr4_bits(vcpu, X86_CR4_DE)) { | |
631 | kvm_queue_exception(vcpu, UD_VECTOR); | |
632 | return 1; | |
633 | } | |
634 | /* fall through */ | |
635 | case 6: | |
636 | *val = vcpu->arch.dr6; | |
637 | break; | |
638 | case 5: | |
639 | if (kvm_read_cr4_bits(vcpu, X86_CR4_DE)) { | |
640 | kvm_queue_exception(vcpu, UD_VECTOR); | |
641 | return 1; | |
642 | } | |
643 | /* fall through */ | |
644 | default: /* 7 */ | |
645 | *val = vcpu->arch.dr7; | |
646 | break; | |
647 | } | |
648 | ||
649 | return 0; | |
650 | } | |
651 | EXPORT_SYMBOL_GPL(kvm_get_dr); | |
652 | ||
d8017474 AG |
653 | static inline u32 bit(int bitno) |
654 | { | |
655 | return 1 << (bitno & 31); | |
656 | } | |
657 | ||
043405e1 CO |
658 | /* |
659 | * List of msr numbers which we expose to userspace through KVM_GET_MSRS | |
660 | * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST. | |
661 | * | |
662 | * This list is modified at module load time to reflect the | |
e3267cbb GC |
663 | * capabilities of the host cpu. This capabilities test skips MSRs that are |
664 | * kvm-specific. Those are put in the beginning of the list. | |
043405e1 | 665 | */ |
e3267cbb | 666 | |
10388a07 | 667 | #define KVM_SAVE_MSRS_BEGIN 5 |
043405e1 | 668 | static u32 msrs_to_save[] = { |
e3267cbb | 669 | MSR_KVM_SYSTEM_TIME, MSR_KVM_WALL_CLOCK, |
55cd8e5a | 670 | HV_X64_MSR_GUEST_OS_ID, HV_X64_MSR_HYPERCALL, |
10388a07 | 671 | HV_X64_MSR_APIC_ASSIST_PAGE, |
043405e1 CO |
672 | MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP, |
673 | MSR_K6_STAR, | |
674 | #ifdef CONFIG_X86_64 | |
675 | MSR_CSTAR, MSR_KERNEL_GS_BASE, MSR_SYSCALL_MASK, MSR_LSTAR, | |
676 | #endif | |
e3267cbb | 677 | MSR_IA32_TSC, MSR_IA32_PERF_STATUS, MSR_IA32_CR_PAT, MSR_VM_HSAVE_PA |
043405e1 CO |
678 | }; |
679 | ||
680 | static unsigned num_msrs_to_save; | |
681 | ||
682 | static u32 emulated_msrs[] = { | |
683 | MSR_IA32_MISC_ENABLE, | |
684 | }; | |
685 | ||
15c4a640 CO |
686 | static void set_efer(struct kvm_vcpu *vcpu, u64 efer) |
687 | { | |
f2b4b7dd | 688 | if (efer & efer_reserved_bits) { |
c1a5d4f9 | 689 | kvm_inject_gp(vcpu, 0); |
15c4a640 CO |
690 | return; |
691 | } | |
692 | ||
693 | if (is_paging(vcpu) | |
f6801dff | 694 | && (vcpu->arch.efer & EFER_LME) != (efer & EFER_LME)) { |
c1a5d4f9 | 695 | kvm_inject_gp(vcpu, 0); |
15c4a640 CO |
696 | return; |
697 | } | |
698 | ||
1b2fd70c AG |
699 | if (efer & EFER_FFXSR) { |
700 | struct kvm_cpuid_entry2 *feat; | |
701 | ||
702 | feat = kvm_find_cpuid_entry(vcpu, 0x80000001, 0); | |
703 | if (!feat || !(feat->edx & bit(X86_FEATURE_FXSR_OPT))) { | |
1b2fd70c AG |
704 | kvm_inject_gp(vcpu, 0); |
705 | return; | |
706 | } | |
707 | } | |
708 | ||
d8017474 AG |
709 | if (efer & EFER_SVME) { |
710 | struct kvm_cpuid_entry2 *feat; | |
711 | ||
712 | feat = kvm_find_cpuid_entry(vcpu, 0x80000001, 0); | |
713 | if (!feat || !(feat->ecx & bit(X86_FEATURE_SVM))) { | |
d8017474 AG |
714 | kvm_inject_gp(vcpu, 0); |
715 | return; | |
716 | } | |
717 | } | |
718 | ||
15c4a640 CO |
719 | kvm_x86_ops->set_efer(vcpu, efer); |
720 | ||
721 | efer &= ~EFER_LMA; | |
f6801dff | 722 | efer |= vcpu->arch.efer & EFER_LMA; |
15c4a640 | 723 | |
f6801dff | 724 | vcpu->arch.efer = efer; |
9645bb56 AK |
725 | |
726 | vcpu->arch.mmu.base_role.nxe = (efer & EFER_NX) && !tdp_enabled; | |
727 | kvm_mmu_reset_context(vcpu); | |
15c4a640 CO |
728 | } |
729 | ||
f2b4b7dd JR |
730 | void kvm_enable_efer_bits(u64 mask) |
731 | { | |
732 | efer_reserved_bits &= ~mask; | |
733 | } | |
734 | EXPORT_SYMBOL_GPL(kvm_enable_efer_bits); | |
735 | ||
736 | ||
15c4a640 CO |
737 | /* |
738 | * Writes msr value into into the appropriate "register". | |
739 | * Returns 0 on success, non-0 otherwise. | |
740 | * Assumes vcpu_load() was already called. | |
741 | */ | |
742 | int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data) | |
743 | { | |
744 | return kvm_x86_ops->set_msr(vcpu, msr_index, data); | |
745 | } | |
746 | ||
313a3dc7 CO |
747 | /* |
748 | * Adapt set_msr() to msr_io()'s calling convention | |
749 | */ | |
750 | static int do_set_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data) | |
751 | { | |
752 | return kvm_set_msr(vcpu, index, *data); | |
753 | } | |
754 | ||
18068523 GOC |
755 | static void kvm_write_wall_clock(struct kvm *kvm, gpa_t wall_clock) |
756 | { | |
9ed3c444 AK |
757 | int version; |
758 | int r; | |
50d0a0f9 | 759 | struct pvclock_wall_clock wc; |
923de3cf | 760 | struct timespec boot; |
18068523 GOC |
761 | |
762 | if (!wall_clock) | |
763 | return; | |
764 | ||
9ed3c444 AK |
765 | r = kvm_read_guest(kvm, wall_clock, &version, sizeof(version)); |
766 | if (r) | |
767 | return; | |
768 | ||
769 | if (version & 1) | |
770 | ++version; /* first time write, random junk */ | |
771 | ||
772 | ++version; | |
18068523 | 773 | |
18068523 GOC |
774 | kvm_write_guest(kvm, wall_clock, &version, sizeof(version)); |
775 | ||
50d0a0f9 GH |
776 | /* |
777 | * The guest calculates current wall clock time by adding | |
778 | * system time (updated by kvm_write_guest_time below) to the | |
779 | * wall clock specified here. guest system time equals host | |
780 | * system time for us, thus we must fill in host boot time here. | |
781 | */ | |
923de3cf | 782 | getboottime(&boot); |
50d0a0f9 GH |
783 | |
784 | wc.sec = boot.tv_sec; | |
785 | wc.nsec = boot.tv_nsec; | |
786 | wc.version = version; | |
18068523 GOC |
787 | |
788 | kvm_write_guest(kvm, wall_clock, &wc, sizeof(wc)); | |
789 | ||
790 | version++; | |
791 | kvm_write_guest(kvm, wall_clock, &version, sizeof(version)); | |
18068523 GOC |
792 | } |
793 | ||
50d0a0f9 GH |
794 | static uint32_t div_frac(uint32_t dividend, uint32_t divisor) |
795 | { | |
796 | uint32_t quotient, remainder; | |
797 | ||
798 | /* Don't try to replace with do_div(), this one calculates | |
799 | * "(dividend << 32) / divisor" */ | |
800 | __asm__ ( "divl %4" | |
801 | : "=a" (quotient), "=d" (remainder) | |
802 | : "0" (0), "1" (dividend), "r" (divisor) ); | |
803 | return quotient; | |
804 | } | |
805 | ||
806 | static void kvm_set_time_scale(uint32_t tsc_khz, struct pvclock_vcpu_time_info *hv_clock) | |
807 | { | |
808 | uint64_t nsecs = 1000000000LL; | |
809 | int32_t shift = 0; | |
810 | uint64_t tps64; | |
811 | uint32_t tps32; | |
812 | ||
813 | tps64 = tsc_khz * 1000LL; | |
814 | while (tps64 > nsecs*2) { | |
815 | tps64 >>= 1; | |
816 | shift--; | |
817 | } | |
818 | ||
819 | tps32 = (uint32_t)tps64; | |
820 | while (tps32 <= (uint32_t)nsecs) { | |
821 | tps32 <<= 1; | |
822 | shift++; | |
823 | } | |
824 | ||
825 | hv_clock->tsc_shift = shift; | |
826 | hv_clock->tsc_to_system_mul = div_frac(nsecs, tps32); | |
827 | ||
828 | pr_debug("%s: tsc_khz %u, tsc_shift %d, tsc_mul %u\n", | |
80a914dc | 829 | __func__, tsc_khz, hv_clock->tsc_shift, |
50d0a0f9 GH |
830 | hv_clock->tsc_to_system_mul); |
831 | } | |
832 | ||
c8076604 GH |
833 | static DEFINE_PER_CPU(unsigned long, cpu_tsc_khz); |
834 | ||
18068523 GOC |
835 | static void kvm_write_guest_time(struct kvm_vcpu *v) |
836 | { | |
837 | struct timespec ts; | |
838 | unsigned long flags; | |
839 | struct kvm_vcpu_arch *vcpu = &v->arch; | |
840 | void *shared_kaddr; | |
463656c0 | 841 | unsigned long this_tsc_khz; |
18068523 GOC |
842 | |
843 | if ((!vcpu->time_page)) | |
844 | return; | |
845 | ||
463656c0 AK |
846 | this_tsc_khz = get_cpu_var(cpu_tsc_khz); |
847 | if (unlikely(vcpu->hv_clock_tsc_khz != this_tsc_khz)) { | |
848 | kvm_set_time_scale(this_tsc_khz, &vcpu->hv_clock); | |
849 | vcpu->hv_clock_tsc_khz = this_tsc_khz; | |
50d0a0f9 | 850 | } |
463656c0 | 851 | put_cpu_var(cpu_tsc_khz); |
50d0a0f9 | 852 | |
18068523 GOC |
853 | /* Keep irq disabled to prevent changes to the clock */ |
854 | local_irq_save(flags); | |
af24a4e4 | 855 | kvm_get_msr(v, MSR_IA32_TSC, &vcpu->hv_clock.tsc_timestamp); |
18068523 | 856 | ktime_get_ts(&ts); |
923de3cf | 857 | monotonic_to_bootbased(&ts); |
18068523 GOC |
858 | local_irq_restore(flags); |
859 | ||
860 | /* With all the info we got, fill in the values */ | |
861 | ||
862 | vcpu->hv_clock.system_time = ts.tv_nsec + | |
afbcf7ab GC |
863 | (NSEC_PER_SEC * (u64)ts.tv_sec) + v->kvm->arch.kvmclock_offset; |
864 | ||
18068523 GOC |
865 | /* |
866 | * The interface expects us to write an even number signaling that the | |
867 | * update is finished. Since the guest won't see the intermediate | |
50d0a0f9 | 868 | * state, we just increase by 2 at the end. |
18068523 | 869 | */ |
50d0a0f9 | 870 | vcpu->hv_clock.version += 2; |
18068523 GOC |
871 | |
872 | shared_kaddr = kmap_atomic(vcpu->time_page, KM_USER0); | |
873 | ||
874 | memcpy(shared_kaddr + vcpu->time_offset, &vcpu->hv_clock, | |
50d0a0f9 | 875 | sizeof(vcpu->hv_clock)); |
18068523 GOC |
876 | |
877 | kunmap_atomic(shared_kaddr, KM_USER0); | |
878 | ||
879 | mark_page_dirty(v->kvm, vcpu->time >> PAGE_SHIFT); | |
880 | } | |
881 | ||
c8076604 GH |
882 | static int kvm_request_guest_time_update(struct kvm_vcpu *v) |
883 | { | |
884 | struct kvm_vcpu_arch *vcpu = &v->arch; | |
885 | ||
886 | if (!vcpu->time_page) | |
887 | return 0; | |
888 | set_bit(KVM_REQ_KVMCLOCK_UPDATE, &v->requests); | |
889 | return 1; | |
890 | } | |
891 | ||
9ba075a6 AK |
892 | static bool msr_mtrr_valid(unsigned msr) |
893 | { | |
894 | switch (msr) { | |
895 | case 0x200 ... 0x200 + 2 * KVM_NR_VAR_MTRR - 1: | |
896 | case MSR_MTRRfix64K_00000: | |
897 | case MSR_MTRRfix16K_80000: | |
898 | case MSR_MTRRfix16K_A0000: | |
899 | case MSR_MTRRfix4K_C0000: | |
900 | case MSR_MTRRfix4K_C8000: | |
901 | case MSR_MTRRfix4K_D0000: | |
902 | case MSR_MTRRfix4K_D8000: | |
903 | case MSR_MTRRfix4K_E0000: | |
904 | case MSR_MTRRfix4K_E8000: | |
905 | case MSR_MTRRfix4K_F0000: | |
906 | case MSR_MTRRfix4K_F8000: | |
907 | case MSR_MTRRdefType: | |
908 | case MSR_IA32_CR_PAT: | |
909 | return true; | |
910 | case 0x2f8: | |
911 | return true; | |
912 | } | |
913 | return false; | |
914 | } | |
915 | ||
d6289b93 MT |
916 | static bool valid_pat_type(unsigned t) |
917 | { | |
918 | return t < 8 && (1 << t) & 0xf3; /* 0, 1, 4, 5, 6, 7 */ | |
919 | } | |
920 | ||
921 | static bool valid_mtrr_type(unsigned t) | |
922 | { | |
923 | return t < 8 && (1 << t) & 0x73; /* 0, 1, 4, 5, 6 */ | |
924 | } | |
925 | ||
926 | static bool mtrr_valid(struct kvm_vcpu *vcpu, u32 msr, u64 data) | |
927 | { | |
928 | int i; | |
929 | ||
930 | if (!msr_mtrr_valid(msr)) | |
931 | return false; | |
932 | ||
933 | if (msr == MSR_IA32_CR_PAT) { | |
934 | for (i = 0; i < 8; i++) | |
935 | if (!valid_pat_type((data >> (i * 8)) & 0xff)) | |
936 | return false; | |
937 | return true; | |
938 | } else if (msr == MSR_MTRRdefType) { | |
939 | if (data & ~0xcff) | |
940 | return false; | |
941 | return valid_mtrr_type(data & 0xff); | |
942 | } else if (msr >= MSR_MTRRfix64K_00000 && msr <= MSR_MTRRfix4K_F8000) { | |
943 | for (i = 0; i < 8 ; i++) | |
944 | if (!valid_mtrr_type((data >> (i * 8)) & 0xff)) | |
945 | return false; | |
946 | return true; | |
947 | } | |
948 | ||
949 | /* variable MTRRs */ | |
950 | return valid_mtrr_type(data & 0xff); | |
951 | } | |
952 | ||
9ba075a6 AK |
953 | static int set_msr_mtrr(struct kvm_vcpu *vcpu, u32 msr, u64 data) |
954 | { | |
0bed3b56 SY |
955 | u64 *p = (u64 *)&vcpu->arch.mtrr_state.fixed_ranges; |
956 | ||
d6289b93 | 957 | if (!mtrr_valid(vcpu, msr, data)) |
9ba075a6 AK |
958 | return 1; |
959 | ||
0bed3b56 SY |
960 | if (msr == MSR_MTRRdefType) { |
961 | vcpu->arch.mtrr_state.def_type = data; | |
962 | vcpu->arch.mtrr_state.enabled = (data & 0xc00) >> 10; | |
963 | } else if (msr == MSR_MTRRfix64K_00000) | |
964 | p[0] = data; | |
965 | else if (msr == MSR_MTRRfix16K_80000 || msr == MSR_MTRRfix16K_A0000) | |
966 | p[1 + msr - MSR_MTRRfix16K_80000] = data; | |
967 | else if (msr >= MSR_MTRRfix4K_C0000 && msr <= MSR_MTRRfix4K_F8000) | |
968 | p[3 + msr - MSR_MTRRfix4K_C0000] = data; | |
969 | else if (msr == MSR_IA32_CR_PAT) | |
970 | vcpu->arch.pat = data; | |
971 | else { /* Variable MTRRs */ | |
972 | int idx, is_mtrr_mask; | |
973 | u64 *pt; | |
974 | ||
975 | idx = (msr - 0x200) / 2; | |
976 | is_mtrr_mask = msr - 0x200 - 2 * idx; | |
977 | if (!is_mtrr_mask) | |
978 | pt = | |
979 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].base_lo; | |
980 | else | |
981 | pt = | |
982 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].mask_lo; | |
983 | *pt = data; | |
984 | } | |
985 | ||
986 | kvm_mmu_reset_context(vcpu); | |
9ba075a6 AK |
987 | return 0; |
988 | } | |
15c4a640 | 989 | |
890ca9ae | 990 | static int set_msr_mce(struct kvm_vcpu *vcpu, u32 msr, u64 data) |
15c4a640 | 991 | { |
890ca9ae HY |
992 | u64 mcg_cap = vcpu->arch.mcg_cap; |
993 | unsigned bank_num = mcg_cap & 0xff; | |
994 | ||
15c4a640 | 995 | switch (msr) { |
15c4a640 | 996 | case MSR_IA32_MCG_STATUS: |
890ca9ae | 997 | vcpu->arch.mcg_status = data; |
15c4a640 | 998 | break; |
c7ac679c | 999 | case MSR_IA32_MCG_CTL: |
890ca9ae HY |
1000 | if (!(mcg_cap & MCG_CTL_P)) |
1001 | return 1; | |
1002 | if (data != 0 && data != ~(u64)0) | |
1003 | return -1; | |
1004 | vcpu->arch.mcg_ctl = data; | |
1005 | break; | |
1006 | default: | |
1007 | if (msr >= MSR_IA32_MC0_CTL && | |
1008 | msr < MSR_IA32_MC0_CTL + 4 * bank_num) { | |
1009 | u32 offset = msr - MSR_IA32_MC0_CTL; | |
114be429 AP |
1010 | /* only 0 or all 1s can be written to IA32_MCi_CTL |
1011 | * some Linux kernels though clear bit 10 in bank 4 to | |
1012 | * workaround a BIOS/GART TBL issue on AMD K8s, ignore | |
1013 | * this to avoid an uncatched #GP in the guest | |
1014 | */ | |
890ca9ae | 1015 | if ((offset & 0x3) == 0 && |
114be429 | 1016 | data != 0 && (data | (1 << 10)) != ~(u64)0) |
890ca9ae HY |
1017 | return -1; |
1018 | vcpu->arch.mce_banks[offset] = data; | |
1019 | break; | |
1020 | } | |
1021 | return 1; | |
1022 | } | |
1023 | return 0; | |
1024 | } | |
1025 | ||
ffde22ac ES |
1026 | static int xen_hvm_config(struct kvm_vcpu *vcpu, u64 data) |
1027 | { | |
1028 | struct kvm *kvm = vcpu->kvm; | |
1029 | int lm = is_long_mode(vcpu); | |
1030 | u8 *blob_addr = lm ? (u8 *)(long)kvm->arch.xen_hvm_config.blob_addr_64 | |
1031 | : (u8 *)(long)kvm->arch.xen_hvm_config.blob_addr_32; | |
1032 | u8 blob_size = lm ? kvm->arch.xen_hvm_config.blob_size_64 | |
1033 | : kvm->arch.xen_hvm_config.blob_size_32; | |
1034 | u32 page_num = data & ~PAGE_MASK; | |
1035 | u64 page_addr = data & PAGE_MASK; | |
1036 | u8 *page; | |
1037 | int r; | |
1038 | ||
1039 | r = -E2BIG; | |
1040 | if (page_num >= blob_size) | |
1041 | goto out; | |
1042 | r = -ENOMEM; | |
1043 | page = kzalloc(PAGE_SIZE, GFP_KERNEL); | |
1044 | if (!page) | |
1045 | goto out; | |
1046 | r = -EFAULT; | |
1047 | if (copy_from_user(page, blob_addr + (page_num * PAGE_SIZE), PAGE_SIZE)) | |
1048 | goto out_free; | |
1049 | if (kvm_write_guest(kvm, page_addr, page, PAGE_SIZE)) | |
1050 | goto out_free; | |
1051 | r = 0; | |
1052 | out_free: | |
1053 | kfree(page); | |
1054 | out: | |
1055 | return r; | |
1056 | } | |
1057 | ||
55cd8e5a GN |
1058 | static bool kvm_hv_hypercall_enabled(struct kvm *kvm) |
1059 | { | |
1060 | return kvm->arch.hv_hypercall & HV_X64_MSR_HYPERCALL_ENABLE; | |
1061 | } | |
1062 | ||
1063 | static bool kvm_hv_msr_partition_wide(u32 msr) | |
1064 | { | |
1065 | bool r = false; | |
1066 | switch (msr) { | |
1067 | case HV_X64_MSR_GUEST_OS_ID: | |
1068 | case HV_X64_MSR_HYPERCALL: | |
1069 | r = true; | |
1070 | break; | |
1071 | } | |
1072 | ||
1073 | return r; | |
1074 | } | |
1075 | ||
1076 | static int set_msr_hyperv_pw(struct kvm_vcpu *vcpu, u32 msr, u64 data) | |
1077 | { | |
1078 | struct kvm *kvm = vcpu->kvm; | |
1079 | ||
1080 | switch (msr) { | |
1081 | case HV_X64_MSR_GUEST_OS_ID: | |
1082 | kvm->arch.hv_guest_os_id = data; | |
1083 | /* setting guest os id to zero disables hypercall page */ | |
1084 | if (!kvm->arch.hv_guest_os_id) | |
1085 | kvm->arch.hv_hypercall &= ~HV_X64_MSR_HYPERCALL_ENABLE; | |
1086 | break; | |
1087 | case HV_X64_MSR_HYPERCALL: { | |
1088 | u64 gfn; | |
1089 | unsigned long addr; | |
1090 | u8 instructions[4]; | |
1091 | ||
1092 | /* if guest os id is not set hypercall should remain disabled */ | |
1093 | if (!kvm->arch.hv_guest_os_id) | |
1094 | break; | |
1095 | if (!(data & HV_X64_MSR_HYPERCALL_ENABLE)) { | |
1096 | kvm->arch.hv_hypercall = data; | |
1097 | break; | |
1098 | } | |
1099 | gfn = data >> HV_X64_MSR_HYPERCALL_PAGE_ADDRESS_SHIFT; | |
1100 | addr = gfn_to_hva(kvm, gfn); | |
1101 | if (kvm_is_error_hva(addr)) | |
1102 | return 1; | |
1103 | kvm_x86_ops->patch_hypercall(vcpu, instructions); | |
1104 | ((unsigned char *)instructions)[3] = 0xc3; /* ret */ | |
1105 | if (copy_to_user((void __user *)addr, instructions, 4)) | |
1106 | return 1; | |
1107 | kvm->arch.hv_hypercall = data; | |
1108 | break; | |
1109 | } | |
1110 | default: | |
1111 | pr_unimpl(vcpu, "HYPER-V unimplemented wrmsr: 0x%x " | |
1112 | "data 0x%llx\n", msr, data); | |
1113 | return 1; | |
1114 | } | |
1115 | return 0; | |
1116 | } | |
1117 | ||
1118 | static int set_msr_hyperv(struct kvm_vcpu *vcpu, u32 msr, u64 data) | |
1119 | { | |
10388a07 GN |
1120 | switch (msr) { |
1121 | case HV_X64_MSR_APIC_ASSIST_PAGE: { | |
1122 | unsigned long addr; | |
55cd8e5a | 1123 | |
10388a07 GN |
1124 | if (!(data & HV_X64_MSR_APIC_ASSIST_PAGE_ENABLE)) { |
1125 | vcpu->arch.hv_vapic = data; | |
1126 | break; | |
1127 | } | |
1128 | addr = gfn_to_hva(vcpu->kvm, data >> | |
1129 | HV_X64_MSR_APIC_ASSIST_PAGE_ADDRESS_SHIFT); | |
1130 | if (kvm_is_error_hva(addr)) | |
1131 | return 1; | |
1132 | if (clear_user((void __user *)addr, PAGE_SIZE)) | |
1133 | return 1; | |
1134 | vcpu->arch.hv_vapic = data; | |
1135 | break; | |
1136 | } | |
1137 | case HV_X64_MSR_EOI: | |
1138 | return kvm_hv_vapic_msr_write(vcpu, APIC_EOI, data); | |
1139 | case HV_X64_MSR_ICR: | |
1140 | return kvm_hv_vapic_msr_write(vcpu, APIC_ICR, data); | |
1141 | case HV_X64_MSR_TPR: | |
1142 | return kvm_hv_vapic_msr_write(vcpu, APIC_TASKPRI, data); | |
1143 | default: | |
1144 | pr_unimpl(vcpu, "HYPER-V unimplemented wrmsr: 0x%x " | |
1145 | "data 0x%llx\n", msr, data); | |
1146 | return 1; | |
1147 | } | |
1148 | ||
1149 | return 0; | |
55cd8e5a GN |
1150 | } |
1151 | ||
15c4a640 CO |
1152 | int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data) |
1153 | { | |
1154 | switch (msr) { | |
15c4a640 CO |
1155 | case MSR_EFER: |
1156 | set_efer(vcpu, data); | |
1157 | break; | |
8f1589d9 AP |
1158 | case MSR_K7_HWCR: |
1159 | data &= ~(u64)0x40; /* ignore flush filter disable */ | |
82494028 | 1160 | data &= ~(u64)0x100; /* ignore ignne emulation enable */ |
8f1589d9 AP |
1161 | if (data != 0) { |
1162 | pr_unimpl(vcpu, "unimplemented HWCR wrmsr: 0x%llx\n", | |
1163 | data); | |
1164 | return 1; | |
1165 | } | |
15c4a640 | 1166 | break; |
f7c6d140 AP |
1167 | case MSR_FAM10H_MMIO_CONF_BASE: |
1168 | if (data != 0) { | |
1169 | pr_unimpl(vcpu, "unimplemented MMIO_CONF_BASE wrmsr: " | |
1170 | "0x%llx\n", data); | |
1171 | return 1; | |
1172 | } | |
15c4a640 | 1173 | break; |
c323c0e5 | 1174 | case MSR_AMD64_NB_CFG: |
c7ac679c | 1175 | break; |
b5e2fec0 AG |
1176 | case MSR_IA32_DEBUGCTLMSR: |
1177 | if (!data) { | |
1178 | /* We support the non-activated case already */ | |
1179 | break; | |
1180 | } else if (data & ~(DEBUGCTLMSR_LBR | DEBUGCTLMSR_BTF)) { | |
1181 | /* Values other than LBR and BTF are vendor-specific, | |
1182 | thus reserved and should throw a #GP */ | |
1183 | return 1; | |
1184 | } | |
1185 | pr_unimpl(vcpu, "%s: MSR_IA32_DEBUGCTLMSR 0x%llx, nop\n", | |
1186 | __func__, data); | |
1187 | break; | |
15c4a640 CO |
1188 | case MSR_IA32_UCODE_REV: |
1189 | case MSR_IA32_UCODE_WRITE: | |
61a6bd67 | 1190 | case MSR_VM_HSAVE_PA: |
6098ca93 | 1191 | case MSR_AMD64_PATCH_LOADER: |
15c4a640 | 1192 | break; |
9ba075a6 AK |
1193 | case 0x200 ... 0x2ff: |
1194 | return set_msr_mtrr(vcpu, msr, data); | |
15c4a640 CO |
1195 | case MSR_IA32_APICBASE: |
1196 | kvm_set_apic_base(vcpu, data); | |
1197 | break; | |
0105d1a5 GN |
1198 | case APIC_BASE_MSR ... APIC_BASE_MSR + 0x3ff: |
1199 | return kvm_x2apic_msr_write(vcpu, msr, data); | |
15c4a640 | 1200 | case MSR_IA32_MISC_ENABLE: |
ad312c7c | 1201 | vcpu->arch.ia32_misc_enable_msr = data; |
15c4a640 | 1202 | break; |
18068523 GOC |
1203 | case MSR_KVM_WALL_CLOCK: |
1204 | vcpu->kvm->arch.wall_clock = data; | |
1205 | kvm_write_wall_clock(vcpu->kvm, data); | |
1206 | break; | |
1207 | case MSR_KVM_SYSTEM_TIME: { | |
1208 | if (vcpu->arch.time_page) { | |
1209 | kvm_release_page_dirty(vcpu->arch.time_page); | |
1210 | vcpu->arch.time_page = NULL; | |
1211 | } | |
1212 | ||
1213 | vcpu->arch.time = data; | |
1214 | ||
1215 | /* we verify if the enable bit is set... */ | |
1216 | if (!(data & 1)) | |
1217 | break; | |
1218 | ||
1219 | /* ...but clean it before doing the actual write */ | |
1220 | vcpu->arch.time_offset = data & ~(PAGE_MASK | 1); | |
1221 | ||
18068523 GOC |
1222 | vcpu->arch.time_page = |
1223 | gfn_to_page(vcpu->kvm, data >> PAGE_SHIFT); | |
18068523 GOC |
1224 | |
1225 | if (is_error_page(vcpu->arch.time_page)) { | |
1226 | kvm_release_page_clean(vcpu->arch.time_page); | |
1227 | vcpu->arch.time_page = NULL; | |
1228 | } | |
1229 | ||
c8076604 | 1230 | kvm_request_guest_time_update(vcpu); |
18068523 GOC |
1231 | break; |
1232 | } | |
890ca9ae HY |
1233 | case MSR_IA32_MCG_CTL: |
1234 | case MSR_IA32_MCG_STATUS: | |
1235 | case MSR_IA32_MC0_CTL ... MSR_IA32_MC0_CTL + 4 * KVM_MAX_MCE_BANKS - 1: | |
1236 | return set_msr_mce(vcpu, msr, data); | |
71db6023 AP |
1237 | |
1238 | /* Performance counters are not protected by a CPUID bit, | |
1239 | * so we should check all of them in the generic path for the sake of | |
1240 | * cross vendor migration. | |
1241 | * Writing a zero into the event select MSRs disables them, | |
1242 | * which we perfectly emulate ;-). Any other value should be at least | |
1243 | * reported, some guests depend on them. | |
1244 | */ | |
1245 | case MSR_P6_EVNTSEL0: | |
1246 | case MSR_P6_EVNTSEL1: | |
1247 | case MSR_K7_EVNTSEL0: | |
1248 | case MSR_K7_EVNTSEL1: | |
1249 | case MSR_K7_EVNTSEL2: | |
1250 | case MSR_K7_EVNTSEL3: | |
1251 | if (data != 0) | |
1252 | pr_unimpl(vcpu, "unimplemented perfctr wrmsr: " | |
1253 | "0x%x data 0x%llx\n", msr, data); | |
1254 | break; | |
1255 | /* at least RHEL 4 unconditionally writes to the perfctr registers, | |
1256 | * so we ignore writes to make it happy. | |
1257 | */ | |
1258 | case MSR_P6_PERFCTR0: | |
1259 | case MSR_P6_PERFCTR1: | |
1260 | case MSR_K7_PERFCTR0: | |
1261 | case MSR_K7_PERFCTR1: | |
1262 | case MSR_K7_PERFCTR2: | |
1263 | case MSR_K7_PERFCTR3: | |
1264 | pr_unimpl(vcpu, "unimplemented perfctr wrmsr: " | |
1265 | "0x%x data 0x%llx\n", msr, data); | |
1266 | break; | |
55cd8e5a GN |
1267 | case HV_X64_MSR_GUEST_OS_ID ... HV_X64_MSR_SINT15: |
1268 | if (kvm_hv_msr_partition_wide(msr)) { | |
1269 | int r; | |
1270 | mutex_lock(&vcpu->kvm->lock); | |
1271 | r = set_msr_hyperv_pw(vcpu, msr, data); | |
1272 | mutex_unlock(&vcpu->kvm->lock); | |
1273 | return r; | |
1274 | } else | |
1275 | return set_msr_hyperv(vcpu, msr, data); | |
1276 | break; | |
15c4a640 | 1277 | default: |
ffde22ac ES |
1278 | if (msr && (msr == vcpu->kvm->arch.xen_hvm_config.msr)) |
1279 | return xen_hvm_config(vcpu, data); | |
ed85c068 AP |
1280 | if (!ignore_msrs) { |
1281 | pr_unimpl(vcpu, "unhandled wrmsr: 0x%x data %llx\n", | |
1282 | msr, data); | |
1283 | return 1; | |
1284 | } else { | |
1285 | pr_unimpl(vcpu, "ignored wrmsr: 0x%x data %llx\n", | |
1286 | msr, data); | |
1287 | break; | |
1288 | } | |
15c4a640 CO |
1289 | } |
1290 | return 0; | |
1291 | } | |
1292 | EXPORT_SYMBOL_GPL(kvm_set_msr_common); | |
1293 | ||
1294 | ||
1295 | /* | |
1296 | * Reads an msr value (of 'msr_index') into 'pdata'. | |
1297 | * Returns 0 on success, non-0 otherwise. | |
1298 | * Assumes vcpu_load() was already called. | |
1299 | */ | |
1300 | int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata) | |
1301 | { | |
1302 | return kvm_x86_ops->get_msr(vcpu, msr_index, pdata); | |
1303 | } | |
1304 | ||
9ba075a6 AK |
1305 | static int get_msr_mtrr(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
1306 | { | |
0bed3b56 SY |
1307 | u64 *p = (u64 *)&vcpu->arch.mtrr_state.fixed_ranges; |
1308 | ||
9ba075a6 AK |
1309 | if (!msr_mtrr_valid(msr)) |
1310 | return 1; | |
1311 | ||
0bed3b56 SY |
1312 | if (msr == MSR_MTRRdefType) |
1313 | *pdata = vcpu->arch.mtrr_state.def_type + | |
1314 | (vcpu->arch.mtrr_state.enabled << 10); | |
1315 | else if (msr == MSR_MTRRfix64K_00000) | |
1316 | *pdata = p[0]; | |
1317 | else if (msr == MSR_MTRRfix16K_80000 || msr == MSR_MTRRfix16K_A0000) | |
1318 | *pdata = p[1 + msr - MSR_MTRRfix16K_80000]; | |
1319 | else if (msr >= MSR_MTRRfix4K_C0000 && msr <= MSR_MTRRfix4K_F8000) | |
1320 | *pdata = p[3 + msr - MSR_MTRRfix4K_C0000]; | |
1321 | else if (msr == MSR_IA32_CR_PAT) | |
1322 | *pdata = vcpu->arch.pat; | |
1323 | else { /* Variable MTRRs */ | |
1324 | int idx, is_mtrr_mask; | |
1325 | u64 *pt; | |
1326 | ||
1327 | idx = (msr - 0x200) / 2; | |
1328 | is_mtrr_mask = msr - 0x200 - 2 * idx; | |
1329 | if (!is_mtrr_mask) | |
1330 | pt = | |
1331 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].base_lo; | |
1332 | else | |
1333 | pt = | |
1334 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].mask_lo; | |
1335 | *pdata = *pt; | |
1336 | } | |
1337 | ||
9ba075a6 AK |
1338 | return 0; |
1339 | } | |
1340 | ||
890ca9ae | 1341 | static int get_msr_mce(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
15c4a640 CO |
1342 | { |
1343 | u64 data; | |
890ca9ae HY |
1344 | u64 mcg_cap = vcpu->arch.mcg_cap; |
1345 | unsigned bank_num = mcg_cap & 0xff; | |
15c4a640 CO |
1346 | |
1347 | switch (msr) { | |
15c4a640 CO |
1348 | case MSR_IA32_P5_MC_ADDR: |
1349 | case MSR_IA32_P5_MC_TYPE: | |
890ca9ae HY |
1350 | data = 0; |
1351 | break; | |
15c4a640 | 1352 | case MSR_IA32_MCG_CAP: |
890ca9ae HY |
1353 | data = vcpu->arch.mcg_cap; |
1354 | break; | |
c7ac679c | 1355 | case MSR_IA32_MCG_CTL: |
890ca9ae HY |
1356 | if (!(mcg_cap & MCG_CTL_P)) |
1357 | return 1; | |
1358 | data = vcpu->arch.mcg_ctl; | |
1359 | break; | |
1360 | case MSR_IA32_MCG_STATUS: | |
1361 | data = vcpu->arch.mcg_status; | |
1362 | break; | |
1363 | default: | |
1364 | if (msr >= MSR_IA32_MC0_CTL && | |
1365 | msr < MSR_IA32_MC0_CTL + 4 * bank_num) { | |
1366 | u32 offset = msr - MSR_IA32_MC0_CTL; | |
1367 | data = vcpu->arch.mce_banks[offset]; | |
1368 | break; | |
1369 | } | |
1370 | return 1; | |
1371 | } | |
1372 | *pdata = data; | |
1373 | return 0; | |
1374 | } | |
1375 | ||
55cd8e5a GN |
1376 | static int get_msr_hyperv_pw(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
1377 | { | |
1378 | u64 data = 0; | |
1379 | struct kvm *kvm = vcpu->kvm; | |
1380 | ||
1381 | switch (msr) { | |
1382 | case HV_X64_MSR_GUEST_OS_ID: | |
1383 | data = kvm->arch.hv_guest_os_id; | |
1384 | break; | |
1385 | case HV_X64_MSR_HYPERCALL: | |
1386 | data = kvm->arch.hv_hypercall; | |
1387 | break; | |
1388 | default: | |
1389 | pr_unimpl(vcpu, "Hyper-V unhandled rdmsr: 0x%x\n", msr); | |
1390 | return 1; | |
1391 | } | |
1392 | ||
1393 | *pdata = data; | |
1394 | return 0; | |
1395 | } | |
1396 | ||
1397 | static int get_msr_hyperv(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) | |
1398 | { | |
1399 | u64 data = 0; | |
1400 | ||
1401 | switch (msr) { | |
1402 | case HV_X64_MSR_VP_INDEX: { | |
1403 | int r; | |
1404 | struct kvm_vcpu *v; | |
1405 | kvm_for_each_vcpu(r, v, vcpu->kvm) | |
1406 | if (v == vcpu) | |
1407 | data = r; | |
1408 | break; | |
1409 | } | |
10388a07 GN |
1410 | case HV_X64_MSR_EOI: |
1411 | return kvm_hv_vapic_msr_read(vcpu, APIC_EOI, pdata); | |
1412 | case HV_X64_MSR_ICR: | |
1413 | return kvm_hv_vapic_msr_read(vcpu, APIC_ICR, pdata); | |
1414 | case HV_X64_MSR_TPR: | |
1415 | return kvm_hv_vapic_msr_read(vcpu, APIC_TASKPRI, pdata); | |
55cd8e5a GN |
1416 | default: |
1417 | pr_unimpl(vcpu, "Hyper-V unhandled rdmsr: 0x%x\n", msr); | |
1418 | return 1; | |
1419 | } | |
1420 | *pdata = data; | |
1421 | return 0; | |
1422 | } | |
1423 | ||
890ca9ae HY |
1424 | int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
1425 | { | |
1426 | u64 data; | |
1427 | ||
1428 | switch (msr) { | |
890ca9ae | 1429 | case MSR_IA32_PLATFORM_ID: |
15c4a640 | 1430 | case MSR_IA32_UCODE_REV: |
15c4a640 | 1431 | case MSR_IA32_EBL_CR_POWERON: |
b5e2fec0 AG |
1432 | case MSR_IA32_DEBUGCTLMSR: |
1433 | case MSR_IA32_LASTBRANCHFROMIP: | |
1434 | case MSR_IA32_LASTBRANCHTOIP: | |
1435 | case MSR_IA32_LASTINTFROMIP: | |
1436 | case MSR_IA32_LASTINTTOIP: | |
60af2ecd JSR |
1437 | case MSR_K8_SYSCFG: |
1438 | case MSR_K7_HWCR: | |
61a6bd67 | 1439 | case MSR_VM_HSAVE_PA: |
1f3ee616 AS |
1440 | case MSR_P6_PERFCTR0: |
1441 | case MSR_P6_PERFCTR1: | |
7fe29e0f AS |
1442 | case MSR_P6_EVNTSEL0: |
1443 | case MSR_P6_EVNTSEL1: | |
9e699624 | 1444 | case MSR_K7_EVNTSEL0: |
1f3ee616 | 1445 | case MSR_K7_PERFCTR0: |
1fdbd48c | 1446 | case MSR_K8_INT_PENDING_MSG: |
c323c0e5 | 1447 | case MSR_AMD64_NB_CFG: |
f7c6d140 | 1448 | case MSR_FAM10H_MMIO_CONF_BASE: |
15c4a640 CO |
1449 | data = 0; |
1450 | break; | |
9ba075a6 AK |
1451 | case MSR_MTRRcap: |
1452 | data = 0x500 | KVM_NR_VAR_MTRR; | |
1453 | break; | |
1454 | case 0x200 ... 0x2ff: | |
1455 | return get_msr_mtrr(vcpu, msr, pdata); | |
15c4a640 CO |
1456 | case 0xcd: /* fsb frequency */ |
1457 | data = 3; | |
1458 | break; | |
1459 | case MSR_IA32_APICBASE: | |
1460 | data = kvm_get_apic_base(vcpu); | |
1461 | break; | |
0105d1a5 GN |
1462 | case APIC_BASE_MSR ... APIC_BASE_MSR + 0x3ff: |
1463 | return kvm_x2apic_msr_read(vcpu, msr, pdata); | |
1464 | break; | |
15c4a640 | 1465 | case MSR_IA32_MISC_ENABLE: |
ad312c7c | 1466 | data = vcpu->arch.ia32_misc_enable_msr; |
15c4a640 | 1467 | break; |
847f0ad8 AG |
1468 | case MSR_IA32_PERF_STATUS: |
1469 | /* TSC increment by tick */ | |
1470 | data = 1000ULL; | |
1471 | /* CPU multiplier */ | |
1472 | data |= (((uint64_t)4ULL) << 40); | |
1473 | break; | |
15c4a640 | 1474 | case MSR_EFER: |
f6801dff | 1475 | data = vcpu->arch.efer; |
15c4a640 | 1476 | break; |
18068523 GOC |
1477 | case MSR_KVM_WALL_CLOCK: |
1478 | data = vcpu->kvm->arch.wall_clock; | |
1479 | break; | |
1480 | case MSR_KVM_SYSTEM_TIME: | |
1481 | data = vcpu->arch.time; | |
1482 | break; | |
890ca9ae HY |
1483 | case MSR_IA32_P5_MC_ADDR: |
1484 | case MSR_IA32_P5_MC_TYPE: | |
1485 | case MSR_IA32_MCG_CAP: | |
1486 | case MSR_IA32_MCG_CTL: | |
1487 | case MSR_IA32_MCG_STATUS: | |
1488 | case MSR_IA32_MC0_CTL ... MSR_IA32_MC0_CTL + 4 * KVM_MAX_MCE_BANKS - 1: | |
1489 | return get_msr_mce(vcpu, msr, pdata); | |
55cd8e5a GN |
1490 | case HV_X64_MSR_GUEST_OS_ID ... HV_X64_MSR_SINT15: |
1491 | if (kvm_hv_msr_partition_wide(msr)) { | |
1492 | int r; | |
1493 | mutex_lock(&vcpu->kvm->lock); | |
1494 | r = get_msr_hyperv_pw(vcpu, msr, pdata); | |
1495 | mutex_unlock(&vcpu->kvm->lock); | |
1496 | return r; | |
1497 | } else | |
1498 | return get_msr_hyperv(vcpu, msr, pdata); | |
1499 | break; | |
15c4a640 | 1500 | default: |
ed85c068 AP |
1501 | if (!ignore_msrs) { |
1502 | pr_unimpl(vcpu, "unhandled rdmsr: 0x%x\n", msr); | |
1503 | return 1; | |
1504 | } else { | |
1505 | pr_unimpl(vcpu, "ignored rdmsr: 0x%x\n", msr); | |
1506 | data = 0; | |
1507 | } | |
1508 | break; | |
15c4a640 CO |
1509 | } |
1510 | *pdata = data; | |
1511 | return 0; | |
1512 | } | |
1513 | EXPORT_SYMBOL_GPL(kvm_get_msr_common); | |
1514 | ||
313a3dc7 CO |
1515 | /* |
1516 | * Read or write a bunch of msrs. All parameters are kernel addresses. | |
1517 | * | |
1518 | * @return number of msrs set successfully. | |
1519 | */ | |
1520 | static int __msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs *msrs, | |
1521 | struct kvm_msr_entry *entries, | |
1522 | int (*do_msr)(struct kvm_vcpu *vcpu, | |
1523 | unsigned index, u64 *data)) | |
1524 | { | |
f656ce01 | 1525 | int i, idx; |
313a3dc7 CO |
1526 | |
1527 | vcpu_load(vcpu); | |
1528 | ||
f656ce01 | 1529 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
313a3dc7 CO |
1530 | for (i = 0; i < msrs->nmsrs; ++i) |
1531 | if (do_msr(vcpu, entries[i].index, &entries[i].data)) | |
1532 | break; | |
f656ce01 | 1533 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
313a3dc7 CO |
1534 | |
1535 | vcpu_put(vcpu); | |
1536 | ||
1537 | return i; | |
1538 | } | |
1539 | ||
1540 | /* | |
1541 | * Read or write a bunch of msrs. Parameters are user addresses. | |
1542 | * | |
1543 | * @return number of msrs set successfully. | |
1544 | */ | |
1545 | static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs, | |
1546 | int (*do_msr)(struct kvm_vcpu *vcpu, | |
1547 | unsigned index, u64 *data), | |
1548 | int writeback) | |
1549 | { | |
1550 | struct kvm_msrs msrs; | |
1551 | struct kvm_msr_entry *entries; | |
1552 | int r, n; | |
1553 | unsigned size; | |
1554 | ||
1555 | r = -EFAULT; | |
1556 | if (copy_from_user(&msrs, user_msrs, sizeof msrs)) | |
1557 | goto out; | |
1558 | ||
1559 | r = -E2BIG; | |
1560 | if (msrs.nmsrs >= MAX_IO_MSRS) | |
1561 | goto out; | |
1562 | ||
1563 | r = -ENOMEM; | |
1564 | size = sizeof(struct kvm_msr_entry) * msrs.nmsrs; | |
1565 | entries = vmalloc(size); | |
1566 | if (!entries) | |
1567 | goto out; | |
1568 | ||
1569 | r = -EFAULT; | |
1570 | if (copy_from_user(entries, user_msrs->entries, size)) | |
1571 | goto out_free; | |
1572 | ||
1573 | r = n = __msr_io(vcpu, &msrs, entries, do_msr); | |
1574 | if (r < 0) | |
1575 | goto out_free; | |
1576 | ||
1577 | r = -EFAULT; | |
1578 | if (writeback && copy_to_user(user_msrs->entries, entries, size)) | |
1579 | goto out_free; | |
1580 | ||
1581 | r = n; | |
1582 | ||
1583 | out_free: | |
1584 | vfree(entries); | |
1585 | out: | |
1586 | return r; | |
1587 | } | |
1588 | ||
018d00d2 ZX |
1589 | int kvm_dev_ioctl_check_extension(long ext) |
1590 | { | |
1591 | int r; | |
1592 | ||
1593 | switch (ext) { | |
1594 | case KVM_CAP_IRQCHIP: | |
1595 | case KVM_CAP_HLT: | |
1596 | case KVM_CAP_MMU_SHADOW_CACHE_CONTROL: | |
018d00d2 | 1597 | case KVM_CAP_SET_TSS_ADDR: |
07716717 | 1598 | case KVM_CAP_EXT_CPUID: |
c8076604 | 1599 | case KVM_CAP_CLOCKSOURCE: |
7837699f | 1600 | case KVM_CAP_PIT: |
a28e4f5a | 1601 | case KVM_CAP_NOP_IO_DELAY: |
62d9f0db | 1602 | case KVM_CAP_MP_STATE: |
ed848624 | 1603 | case KVM_CAP_SYNC_MMU: |
52d939a0 | 1604 | case KVM_CAP_REINJECT_CONTROL: |
4925663a | 1605 | case KVM_CAP_IRQ_INJECT_STATUS: |
e56d532f | 1606 | case KVM_CAP_ASSIGN_DEV_IRQ: |
721eecbf | 1607 | case KVM_CAP_IRQFD: |
d34e6b17 | 1608 | case KVM_CAP_IOEVENTFD: |
c5ff41ce | 1609 | case KVM_CAP_PIT2: |
e9f42757 | 1610 | case KVM_CAP_PIT_STATE2: |
b927a3ce | 1611 | case KVM_CAP_SET_IDENTITY_MAP_ADDR: |
ffde22ac | 1612 | case KVM_CAP_XEN_HVM: |
afbcf7ab | 1613 | case KVM_CAP_ADJUST_CLOCK: |
3cfc3092 | 1614 | case KVM_CAP_VCPU_EVENTS: |
55cd8e5a | 1615 | case KVM_CAP_HYPERV: |
10388a07 | 1616 | case KVM_CAP_HYPERV_VAPIC: |
c25bc163 | 1617 | case KVM_CAP_HYPERV_SPIN: |
ab9f4ecb | 1618 | case KVM_CAP_PCI_SEGMENT: |
a1efbe77 | 1619 | case KVM_CAP_DEBUGREGS: |
d2be1651 | 1620 | case KVM_CAP_X86_ROBUST_SINGLESTEP: |
018d00d2 ZX |
1621 | r = 1; |
1622 | break; | |
542472b5 LV |
1623 | case KVM_CAP_COALESCED_MMIO: |
1624 | r = KVM_COALESCED_MMIO_PAGE_OFFSET; | |
1625 | break; | |
774ead3a AK |
1626 | case KVM_CAP_VAPIC: |
1627 | r = !kvm_x86_ops->cpu_has_accelerated_tpr(); | |
1628 | break; | |
f725230a AK |
1629 | case KVM_CAP_NR_VCPUS: |
1630 | r = KVM_MAX_VCPUS; | |
1631 | break; | |
a988b910 AK |
1632 | case KVM_CAP_NR_MEMSLOTS: |
1633 | r = KVM_MEMORY_SLOTS; | |
1634 | break; | |
a68a6a72 MT |
1635 | case KVM_CAP_PV_MMU: /* obsolete */ |
1636 | r = 0; | |
2f333bcb | 1637 | break; |
62c476c7 | 1638 | case KVM_CAP_IOMMU: |
19de40a8 | 1639 | r = iommu_found(); |
62c476c7 | 1640 | break; |
890ca9ae HY |
1641 | case KVM_CAP_MCE: |
1642 | r = KVM_MAX_MCE_BANKS; | |
1643 | break; | |
018d00d2 ZX |
1644 | default: |
1645 | r = 0; | |
1646 | break; | |
1647 | } | |
1648 | return r; | |
1649 | ||
1650 | } | |
1651 | ||
043405e1 CO |
1652 | long kvm_arch_dev_ioctl(struct file *filp, |
1653 | unsigned int ioctl, unsigned long arg) | |
1654 | { | |
1655 | void __user *argp = (void __user *)arg; | |
1656 | long r; | |
1657 | ||
1658 | switch (ioctl) { | |
1659 | case KVM_GET_MSR_INDEX_LIST: { | |
1660 | struct kvm_msr_list __user *user_msr_list = argp; | |
1661 | struct kvm_msr_list msr_list; | |
1662 | unsigned n; | |
1663 | ||
1664 | r = -EFAULT; | |
1665 | if (copy_from_user(&msr_list, user_msr_list, sizeof msr_list)) | |
1666 | goto out; | |
1667 | n = msr_list.nmsrs; | |
1668 | msr_list.nmsrs = num_msrs_to_save + ARRAY_SIZE(emulated_msrs); | |
1669 | if (copy_to_user(user_msr_list, &msr_list, sizeof msr_list)) | |
1670 | goto out; | |
1671 | r = -E2BIG; | |
e125e7b6 | 1672 | if (n < msr_list.nmsrs) |
043405e1 CO |
1673 | goto out; |
1674 | r = -EFAULT; | |
1675 | if (copy_to_user(user_msr_list->indices, &msrs_to_save, | |
1676 | num_msrs_to_save * sizeof(u32))) | |
1677 | goto out; | |
e125e7b6 | 1678 | if (copy_to_user(user_msr_list->indices + num_msrs_to_save, |
043405e1 CO |
1679 | &emulated_msrs, |
1680 | ARRAY_SIZE(emulated_msrs) * sizeof(u32))) | |
1681 | goto out; | |
1682 | r = 0; | |
1683 | break; | |
1684 | } | |
674eea0f AK |
1685 | case KVM_GET_SUPPORTED_CPUID: { |
1686 | struct kvm_cpuid2 __user *cpuid_arg = argp; | |
1687 | struct kvm_cpuid2 cpuid; | |
1688 | ||
1689 | r = -EFAULT; | |
1690 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
1691 | goto out; | |
1692 | r = kvm_dev_ioctl_get_supported_cpuid(&cpuid, | |
19355475 | 1693 | cpuid_arg->entries); |
674eea0f AK |
1694 | if (r) |
1695 | goto out; | |
1696 | ||
1697 | r = -EFAULT; | |
1698 | if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid)) | |
1699 | goto out; | |
1700 | r = 0; | |
1701 | break; | |
1702 | } | |
890ca9ae HY |
1703 | case KVM_X86_GET_MCE_CAP_SUPPORTED: { |
1704 | u64 mce_cap; | |
1705 | ||
1706 | mce_cap = KVM_MCE_CAP_SUPPORTED; | |
1707 | r = -EFAULT; | |
1708 | if (copy_to_user(argp, &mce_cap, sizeof mce_cap)) | |
1709 | goto out; | |
1710 | r = 0; | |
1711 | break; | |
1712 | } | |
043405e1 CO |
1713 | default: |
1714 | r = -EINVAL; | |
1715 | } | |
1716 | out: | |
1717 | return r; | |
1718 | } | |
1719 | ||
313a3dc7 CO |
1720 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
1721 | { | |
1722 | kvm_x86_ops->vcpu_load(vcpu, cpu); | |
6b7d7e76 ZA |
1723 | if (unlikely(per_cpu(cpu_tsc_khz, cpu) == 0)) { |
1724 | unsigned long khz = cpufreq_quick_get(cpu); | |
1725 | if (!khz) | |
1726 | khz = tsc_khz; | |
1727 | per_cpu(cpu_tsc_khz, cpu) = khz; | |
1728 | } | |
c8076604 | 1729 | kvm_request_guest_time_update(vcpu); |
313a3dc7 CO |
1730 | } |
1731 | ||
1732 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
1733 | { | |
9327fd11 | 1734 | kvm_put_guest_fpu(vcpu); |
02daab21 | 1735 | kvm_x86_ops->vcpu_put(vcpu); |
313a3dc7 CO |
1736 | } |
1737 | ||
07716717 | 1738 | static int is_efer_nx(void) |
313a3dc7 | 1739 | { |
e286e86e | 1740 | unsigned long long efer = 0; |
313a3dc7 | 1741 | |
e286e86e | 1742 | rdmsrl_safe(MSR_EFER, &efer); |
07716717 DK |
1743 | return efer & EFER_NX; |
1744 | } | |
1745 | ||
1746 | static void cpuid_fix_nx_cap(struct kvm_vcpu *vcpu) | |
1747 | { | |
1748 | int i; | |
1749 | struct kvm_cpuid_entry2 *e, *entry; | |
1750 | ||
313a3dc7 | 1751 | entry = NULL; |
ad312c7c ZX |
1752 | for (i = 0; i < vcpu->arch.cpuid_nent; ++i) { |
1753 | e = &vcpu->arch.cpuid_entries[i]; | |
313a3dc7 CO |
1754 | if (e->function == 0x80000001) { |
1755 | entry = e; | |
1756 | break; | |
1757 | } | |
1758 | } | |
07716717 | 1759 | if (entry && (entry->edx & (1 << 20)) && !is_efer_nx()) { |
313a3dc7 CO |
1760 | entry->edx &= ~(1 << 20); |
1761 | printk(KERN_INFO "kvm: guest NX capability removed\n"); | |
1762 | } | |
1763 | } | |
1764 | ||
07716717 | 1765 | /* when an old userspace process fills a new kernel module */ |
313a3dc7 CO |
1766 | static int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu *vcpu, |
1767 | struct kvm_cpuid *cpuid, | |
1768 | struct kvm_cpuid_entry __user *entries) | |
07716717 DK |
1769 | { |
1770 | int r, i; | |
1771 | struct kvm_cpuid_entry *cpuid_entries; | |
1772 | ||
1773 | r = -E2BIG; | |
1774 | if (cpuid->nent > KVM_MAX_CPUID_ENTRIES) | |
1775 | goto out; | |
1776 | r = -ENOMEM; | |
1777 | cpuid_entries = vmalloc(sizeof(struct kvm_cpuid_entry) * cpuid->nent); | |
1778 | if (!cpuid_entries) | |
1779 | goto out; | |
1780 | r = -EFAULT; | |
1781 | if (copy_from_user(cpuid_entries, entries, | |
1782 | cpuid->nent * sizeof(struct kvm_cpuid_entry))) | |
1783 | goto out_free; | |
1784 | for (i = 0; i < cpuid->nent; i++) { | |
ad312c7c ZX |
1785 | vcpu->arch.cpuid_entries[i].function = cpuid_entries[i].function; |
1786 | vcpu->arch.cpuid_entries[i].eax = cpuid_entries[i].eax; | |
1787 | vcpu->arch.cpuid_entries[i].ebx = cpuid_entries[i].ebx; | |
1788 | vcpu->arch.cpuid_entries[i].ecx = cpuid_entries[i].ecx; | |
1789 | vcpu->arch.cpuid_entries[i].edx = cpuid_entries[i].edx; | |
1790 | vcpu->arch.cpuid_entries[i].index = 0; | |
1791 | vcpu->arch.cpuid_entries[i].flags = 0; | |
1792 | vcpu->arch.cpuid_entries[i].padding[0] = 0; | |
1793 | vcpu->arch.cpuid_entries[i].padding[1] = 0; | |
1794 | vcpu->arch.cpuid_entries[i].padding[2] = 0; | |
1795 | } | |
1796 | vcpu->arch.cpuid_nent = cpuid->nent; | |
07716717 DK |
1797 | cpuid_fix_nx_cap(vcpu); |
1798 | r = 0; | |
fc61b800 | 1799 | kvm_apic_set_version(vcpu); |
0e851880 | 1800 | kvm_x86_ops->cpuid_update(vcpu); |
07716717 DK |
1801 | |
1802 | out_free: | |
1803 | vfree(cpuid_entries); | |
1804 | out: | |
1805 | return r; | |
1806 | } | |
1807 | ||
1808 | static int kvm_vcpu_ioctl_set_cpuid2(struct kvm_vcpu *vcpu, | |
19355475 AS |
1809 | struct kvm_cpuid2 *cpuid, |
1810 | struct kvm_cpuid_entry2 __user *entries) | |
313a3dc7 CO |
1811 | { |
1812 | int r; | |
1813 | ||
1814 | r = -E2BIG; | |
1815 | if (cpuid->nent > KVM_MAX_CPUID_ENTRIES) | |
1816 | goto out; | |
1817 | r = -EFAULT; | |
ad312c7c | 1818 | if (copy_from_user(&vcpu->arch.cpuid_entries, entries, |
07716717 | 1819 | cpuid->nent * sizeof(struct kvm_cpuid_entry2))) |
313a3dc7 | 1820 | goto out; |
ad312c7c | 1821 | vcpu->arch.cpuid_nent = cpuid->nent; |
fc61b800 | 1822 | kvm_apic_set_version(vcpu); |
0e851880 | 1823 | kvm_x86_ops->cpuid_update(vcpu); |
313a3dc7 CO |
1824 | return 0; |
1825 | ||
1826 | out: | |
1827 | return r; | |
1828 | } | |
1829 | ||
07716717 | 1830 | static int kvm_vcpu_ioctl_get_cpuid2(struct kvm_vcpu *vcpu, |
19355475 AS |
1831 | struct kvm_cpuid2 *cpuid, |
1832 | struct kvm_cpuid_entry2 __user *entries) | |
07716717 DK |
1833 | { |
1834 | int r; | |
1835 | ||
1836 | r = -E2BIG; | |
ad312c7c | 1837 | if (cpuid->nent < vcpu->arch.cpuid_nent) |
07716717 DK |
1838 | goto out; |
1839 | r = -EFAULT; | |
ad312c7c | 1840 | if (copy_to_user(entries, &vcpu->arch.cpuid_entries, |
19355475 | 1841 | vcpu->arch.cpuid_nent * sizeof(struct kvm_cpuid_entry2))) |
07716717 DK |
1842 | goto out; |
1843 | return 0; | |
1844 | ||
1845 | out: | |
ad312c7c | 1846 | cpuid->nent = vcpu->arch.cpuid_nent; |
07716717 DK |
1847 | return r; |
1848 | } | |
1849 | ||
07716717 | 1850 | static void do_cpuid_1_ent(struct kvm_cpuid_entry2 *entry, u32 function, |
19355475 | 1851 | u32 index) |
07716717 DK |
1852 | { |
1853 | entry->function = function; | |
1854 | entry->index = index; | |
1855 | cpuid_count(entry->function, entry->index, | |
19355475 | 1856 | &entry->eax, &entry->ebx, &entry->ecx, &entry->edx); |
07716717 DK |
1857 | entry->flags = 0; |
1858 | } | |
1859 | ||
7faa4ee1 AK |
1860 | #define F(x) bit(X86_FEATURE_##x) |
1861 | ||
07716717 DK |
1862 | static void do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function, |
1863 | u32 index, int *nent, int maxnent) | |
1864 | { | |
7faa4ee1 | 1865 | unsigned f_nx = is_efer_nx() ? F(NX) : 0; |
07716717 | 1866 | #ifdef CONFIG_X86_64 |
17cc3935 SY |
1867 | unsigned f_gbpages = (kvm_x86_ops->get_lpage_level() == PT_PDPE_LEVEL) |
1868 | ? F(GBPAGES) : 0; | |
7faa4ee1 AK |
1869 | unsigned f_lm = F(LM); |
1870 | #else | |
17cc3935 | 1871 | unsigned f_gbpages = 0; |
7faa4ee1 | 1872 | unsigned f_lm = 0; |
07716717 | 1873 | #endif |
4e47c7a6 | 1874 | unsigned f_rdtscp = kvm_x86_ops->rdtscp_supported() ? F(RDTSCP) : 0; |
7faa4ee1 AK |
1875 | |
1876 | /* cpuid 1.edx */ | |
1877 | const u32 kvm_supported_word0_x86_features = | |
1878 | F(FPU) | F(VME) | F(DE) | F(PSE) | | |
1879 | F(TSC) | F(MSR) | F(PAE) | F(MCE) | | |
1880 | F(CX8) | F(APIC) | 0 /* Reserved */ | F(SEP) | | |
1881 | F(MTRR) | F(PGE) | F(MCA) | F(CMOV) | | |
1882 | F(PAT) | F(PSE36) | 0 /* PSN */ | F(CLFLSH) | | |
1883 | 0 /* Reserved, DS, ACPI */ | F(MMX) | | |
1884 | F(FXSR) | F(XMM) | F(XMM2) | F(SELFSNOOP) | | |
1885 | 0 /* HTT, TM, Reserved, PBE */; | |
1886 | /* cpuid 0x80000001.edx */ | |
1887 | const u32 kvm_supported_word1_x86_features = | |
1888 | F(FPU) | F(VME) | F(DE) | F(PSE) | | |
1889 | F(TSC) | F(MSR) | F(PAE) | F(MCE) | | |
1890 | F(CX8) | F(APIC) | 0 /* Reserved */ | F(SYSCALL) | | |
1891 | F(MTRR) | F(PGE) | F(MCA) | F(CMOV) | | |
1892 | F(PAT) | F(PSE36) | 0 /* Reserved */ | | |
1893 | f_nx | 0 /* Reserved */ | F(MMXEXT) | F(MMX) | | |
4e47c7a6 | 1894 | F(FXSR) | F(FXSR_OPT) | f_gbpages | f_rdtscp | |
7faa4ee1 AK |
1895 | 0 /* Reserved */ | f_lm | F(3DNOWEXT) | F(3DNOW); |
1896 | /* cpuid 1.ecx */ | |
1897 | const u32 kvm_supported_word4_x86_features = | |
d149c731 AK |
1898 | F(XMM3) | 0 /* Reserved, DTES64, MONITOR */ | |
1899 | 0 /* DS-CPL, VMX, SMX, EST */ | | |
1900 | 0 /* TM2 */ | F(SSSE3) | 0 /* CNXT-ID */ | 0 /* Reserved */ | | |
1901 | 0 /* Reserved */ | F(CX16) | 0 /* xTPR Update, PDCM */ | | |
1902 | 0 /* Reserved, DCA */ | F(XMM4_1) | | |
0105d1a5 | 1903 | F(XMM4_2) | F(X2APIC) | F(MOVBE) | F(POPCNT) | |
d149c731 | 1904 | 0 /* Reserved, XSAVE, OSXSAVE */; |
7faa4ee1 | 1905 | /* cpuid 0x80000001.ecx */ |
07716717 | 1906 | const u32 kvm_supported_word6_x86_features = |
7faa4ee1 AK |
1907 | F(LAHF_LM) | F(CMP_LEGACY) | F(SVM) | 0 /* ExtApicSpace */ | |
1908 | F(CR8_LEGACY) | F(ABM) | F(SSE4A) | F(MISALIGNSSE) | | |
1909 | F(3DNOWPREFETCH) | 0 /* OSVW */ | 0 /* IBS */ | F(SSE5) | | |
1910 | 0 /* SKINIT */ | 0 /* WDT */; | |
07716717 | 1911 | |
19355475 | 1912 | /* all calls to cpuid_count() should be made on the same cpu */ |
07716717 DK |
1913 | get_cpu(); |
1914 | do_cpuid_1_ent(entry, function, index); | |
1915 | ++*nent; | |
1916 | ||
1917 | switch (function) { | |
1918 | case 0: | |
1919 | entry->eax = min(entry->eax, (u32)0xb); | |
1920 | break; | |
1921 | case 1: | |
1922 | entry->edx &= kvm_supported_word0_x86_features; | |
7faa4ee1 | 1923 | entry->ecx &= kvm_supported_word4_x86_features; |
0d1de2d9 GN |
1924 | /* we support x2apic emulation even if host does not support |
1925 | * it since we emulate x2apic in software */ | |
1926 | entry->ecx |= F(X2APIC); | |
07716717 DK |
1927 | break; |
1928 | /* function 2 entries are STATEFUL. That is, repeated cpuid commands | |
1929 | * may return different values. This forces us to get_cpu() before | |
1930 | * issuing the first command, and also to emulate this annoying behavior | |
1931 | * in kvm_emulate_cpuid() using KVM_CPUID_FLAG_STATE_READ_NEXT */ | |
1932 | case 2: { | |
1933 | int t, times = entry->eax & 0xff; | |
1934 | ||
1935 | entry->flags |= KVM_CPUID_FLAG_STATEFUL_FUNC; | |
0fdf8e59 | 1936 | entry->flags |= KVM_CPUID_FLAG_STATE_READ_NEXT; |
07716717 DK |
1937 | for (t = 1; t < times && *nent < maxnent; ++t) { |
1938 | do_cpuid_1_ent(&entry[t], function, 0); | |
1939 | entry[t].flags |= KVM_CPUID_FLAG_STATEFUL_FUNC; | |
1940 | ++*nent; | |
1941 | } | |
1942 | break; | |
1943 | } | |
1944 | /* function 4 and 0xb have additional index. */ | |
1945 | case 4: { | |
14af3f3c | 1946 | int i, cache_type; |
07716717 DK |
1947 | |
1948 | entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX; | |
1949 | /* read more entries until cache_type is zero */ | |
14af3f3c HH |
1950 | for (i = 1; *nent < maxnent; ++i) { |
1951 | cache_type = entry[i - 1].eax & 0x1f; | |
07716717 DK |
1952 | if (!cache_type) |
1953 | break; | |
14af3f3c HH |
1954 | do_cpuid_1_ent(&entry[i], function, i); |
1955 | entry[i].flags |= | |
07716717 DK |
1956 | KVM_CPUID_FLAG_SIGNIFCANT_INDEX; |
1957 | ++*nent; | |
1958 | } | |
1959 | break; | |
1960 | } | |
1961 | case 0xb: { | |
14af3f3c | 1962 | int i, level_type; |
07716717 DK |
1963 | |
1964 | entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX; | |
1965 | /* read more entries until level_type is zero */ | |
14af3f3c | 1966 | for (i = 1; *nent < maxnent; ++i) { |
0853d2c1 | 1967 | level_type = entry[i - 1].ecx & 0xff00; |
07716717 DK |
1968 | if (!level_type) |
1969 | break; | |
14af3f3c HH |
1970 | do_cpuid_1_ent(&entry[i], function, i); |
1971 | entry[i].flags |= | |
07716717 DK |
1972 | KVM_CPUID_FLAG_SIGNIFCANT_INDEX; |
1973 | ++*nent; | |
1974 | } | |
1975 | break; | |
1976 | } | |
1977 | case 0x80000000: | |
1978 | entry->eax = min(entry->eax, 0x8000001a); | |
1979 | break; | |
1980 | case 0x80000001: | |
1981 | entry->edx &= kvm_supported_word1_x86_features; | |
1982 | entry->ecx &= kvm_supported_word6_x86_features; | |
1983 | break; | |
1984 | } | |
d4330ef2 JR |
1985 | |
1986 | kvm_x86_ops->set_supported_cpuid(function, entry); | |
1987 | ||
07716717 DK |
1988 | put_cpu(); |
1989 | } | |
1990 | ||
7faa4ee1 AK |
1991 | #undef F |
1992 | ||
674eea0f | 1993 | static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2 *cpuid, |
19355475 | 1994 | struct kvm_cpuid_entry2 __user *entries) |
07716717 DK |
1995 | { |
1996 | struct kvm_cpuid_entry2 *cpuid_entries; | |
1997 | int limit, nent = 0, r = -E2BIG; | |
1998 | u32 func; | |
1999 | ||
2000 | if (cpuid->nent < 1) | |
2001 | goto out; | |
6a544355 AK |
2002 | if (cpuid->nent > KVM_MAX_CPUID_ENTRIES) |
2003 | cpuid->nent = KVM_MAX_CPUID_ENTRIES; | |
07716717 DK |
2004 | r = -ENOMEM; |
2005 | cpuid_entries = vmalloc(sizeof(struct kvm_cpuid_entry2) * cpuid->nent); | |
2006 | if (!cpuid_entries) | |
2007 | goto out; | |
2008 | ||
2009 | do_cpuid_ent(&cpuid_entries[0], 0, 0, &nent, cpuid->nent); | |
2010 | limit = cpuid_entries[0].eax; | |
2011 | for (func = 1; func <= limit && nent < cpuid->nent; ++func) | |
2012 | do_cpuid_ent(&cpuid_entries[nent], func, 0, | |
19355475 | 2013 | &nent, cpuid->nent); |
07716717 DK |
2014 | r = -E2BIG; |
2015 | if (nent >= cpuid->nent) | |
2016 | goto out_free; | |
2017 | ||
2018 | do_cpuid_ent(&cpuid_entries[nent], 0x80000000, 0, &nent, cpuid->nent); | |
2019 | limit = cpuid_entries[nent - 1].eax; | |
2020 | for (func = 0x80000001; func <= limit && nent < cpuid->nent; ++func) | |
2021 | do_cpuid_ent(&cpuid_entries[nent], func, 0, | |
19355475 | 2022 | &nent, cpuid->nent); |
cb007648 MM |
2023 | r = -E2BIG; |
2024 | if (nent >= cpuid->nent) | |
2025 | goto out_free; | |
2026 | ||
07716717 DK |
2027 | r = -EFAULT; |
2028 | if (copy_to_user(entries, cpuid_entries, | |
19355475 | 2029 | nent * sizeof(struct kvm_cpuid_entry2))) |
07716717 DK |
2030 | goto out_free; |
2031 | cpuid->nent = nent; | |
2032 | r = 0; | |
2033 | ||
2034 | out_free: | |
2035 | vfree(cpuid_entries); | |
2036 | out: | |
2037 | return r; | |
2038 | } | |
2039 | ||
313a3dc7 CO |
2040 | static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu *vcpu, |
2041 | struct kvm_lapic_state *s) | |
2042 | { | |
2043 | vcpu_load(vcpu); | |
ad312c7c | 2044 | memcpy(s->regs, vcpu->arch.apic->regs, sizeof *s); |
313a3dc7 CO |
2045 | vcpu_put(vcpu); |
2046 | ||
2047 | return 0; | |
2048 | } | |
2049 | ||
2050 | static int kvm_vcpu_ioctl_set_lapic(struct kvm_vcpu *vcpu, | |
2051 | struct kvm_lapic_state *s) | |
2052 | { | |
2053 | vcpu_load(vcpu); | |
ad312c7c | 2054 | memcpy(vcpu->arch.apic->regs, s->regs, sizeof *s); |
313a3dc7 | 2055 | kvm_apic_post_state_restore(vcpu); |
cb142eb7 | 2056 | update_cr8_intercept(vcpu); |
313a3dc7 CO |
2057 | vcpu_put(vcpu); |
2058 | ||
2059 | return 0; | |
2060 | } | |
2061 | ||
f77bc6a4 ZX |
2062 | static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, |
2063 | struct kvm_interrupt *irq) | |
2064 | { | |
2065 | if (irq->irq < 0 || irq->irq >= 256) | |
2066 | return -EINVAL; | |
2067 | if (irqchip_in_kernel(vcpu->kvm)) | |
2068 | return -ENXIO; | |
2069 | vcpu_load(vcpu); | |
2070 | ||
66fd3f7f | 2071 | kvm_queue_interrupt(vcpu, irq->irq, false); |
f77bc6a4 ZX |
2072 | |
2073 | vcpu_put(vcpu); | |
2074 | ||
2075 | return 0; | |
2076 | } | |
2077 | ||
c4abb7c9 JK |
2078 | static int kvm_vcpu_ioctl_nmi(struct kvm_vcpu *vcpu) |
2079 | { | |
2080 | vcpu_load(vcpu); | |
2081 | kvm_inject_nmi(vcpu); | |
2082 | vcpu_put(vcpu); | |
2083 | ||
2084 | return 0; | |
2085 | } | |
2086 | ||
b209749f AK |
2087 | static int vcpu_ioctl_tpr_access_reporting(struct kvm_vcpu *vcpu, |
2088 | struct kvm_tpr_access_ctl *tac) | |
2089 | { | |
2090 | if (tac->flags) | |
2091 | return -EINVAL; | |
2092 | vcpu->arch.tpr_access_reporting = !!tac->enabled; | |
2093 | return 0; | |
2094 | } | |
2095 | ||
890ca9ae HY |
2096 | static int kvm_vcpu_ioctl_x86_setup_mce(struct kvm_vcpu *vcpu, |
2097 | u64 mcg_cap) | |
2098 | { | |
2099 | int r; | |
2100 | unsigned bank_num = mcg_cap & 0xff, bank; | |
2101 | ||
2102 | r = -EINVAL; | |
a9e38c3e | 2103 | if (!bank_num || bank_num >= KVM_MAX_MCE_BANKS) |
890ca9ae HY |
2104 | goto out; |
2105 | if (mcg_cap & ~(KVM_MCE_CAP_SUPPORTED | 0xff | 0xff0000)) | |
2106 | goto out; | |
2107 | r = 0; | |
2108 | vcpu->arch.mcg_cap = mcg_cap; | |
2109 | /* Init IA32_MCG_CTL to all 1s */ | |
2110 | if (mcg_cap & MCG_CTL_P) | |
2111 | vcpu->arch.mcg_ctl = ~(u64)0; | |
2112 | /* Init IA32_MCi_CTL to all 1s */ | |
2113 | for (bank = 0; bank < bank_num; bank++) | |
2114 | vcpu->arch.mce_banks[bank*4] = ~(u64)0; | |
2115 | out: | |
2116 | return r; | |
2117 | } | |
2118 | ||
2119 | static int kvm_vcpu_ioctl_x86_set_mce(struct kvm_vcpu *vcpu, | |
2120 | struct kvm_x86_mce *mce) | |
2121 | { | |
2122 | u64 mcg_cap = vcpu->arch.mcg_cap; | |
2123 | unsigned bank_num = mcg_cap & 0xff; | |
2124 | u64 *banks = vcpu->arch.mce_banks; | |
2125 | ||
2126 | if (mce->bank >= bank_num || !(mce->status & MCI_STATUS_VAL)) | |
2127 | return -EINVAL; | |
2128 | /* | |
2129 | * if IA32_MCG_CTL is not all 1s, the uncorrected error | |
2130 | * reporting is disabled | |
2131 | */ | |
2132 | if ((mce->status & MCI_STATUS_UC) && (mcg_cap & MCG_CTL_P) && | |
2133 | vcpu->arch.mcg_ctl != ~(u64)0) | |
2134 | return 0; | |
2135 | banks += 4 * mce->bank; | |
2136 | /* | |
2137 | * if IA32_MCi_CTL is not all 1s, the uncorrected error | |
2138 | * reporting is disabled for the bank | |
2139 | */ | |
2140 | if ((mce->status & MCI_STATUS_UC) && banks[0] != ~(u64)0) | |
2141 | return 0; | |
2142 | if (mce->status & MCI_STATUS_UC) { | |
2143 | if ((vcpu->arch.mcg_status & MCG_STATUS_MCIP) || | |
fc78f519 | 2144 | !kvm_read_cr4_bits(vcpu, X86_CR4_MCE)) { |
890ca9ae HY |
2145 | printk(KERN_DEBUG "kvm: set_mce: " |
2146 | "injects mce exception while " | |
2147 | "previous one is in progress!\n"); | |
2148 | set_bit(KVM_REQ_TRIPLE_FAULT, &vcpu->requests); | |
2149 | return 0; | |
2150 | } | |
2151 | if (banks[1] & MCI_STATUS_VAL) | |
2152 | mce->status |= MCI_STATUS_OVER; | |
2153 | banks[2] = mce->addr; | |
2154 | banks[3] = mce->misc; | |
2155 | vcpu->arch.mcg_status = mce->mcg_status; | |
2156 | banks[1] = mce->status; | |
2157 | kvm_queue_exception(vcpu, MC_VECTOR); | |
2158 | } else if (!(banks[1] & MCI_STATUS_VAL) | |
2159 | || !(banks[1] & MCI_STATUS_UC)) { | |
2160 | if (banks[1] & MCI_STATUS_VAL) | |
2161 | mce->status |= MCI_STATUS_OVER; | |
2162 | banks[2] = mce->addr; | |
2163 | banks[3] = mce->misc; | |
2164 | banks[1] = mce->status; | |
2165 | } else | |
2166 | banks[1] |= MCI_STATUS_OVER; | |
2167 | return 0; | |
2168 | } | |
2169 | ||
3cfc3092 JK |
2170 | static void kvm_vcpu_ioctl_x86_get_vcpu_events(struct kvm_vcpu *vcpu, |
2171 | struct kvm_vcpu_events *events) | |
2172 | { | |
2173 | vcpu_load(vcpu); | |
2174 | ||
03b82a30 JK |
2175 | events->exception.injected = |
2176 | vcpu->arch.exception.pending && | |
2177 | !kvm_exception_is_soft(vcpu->arch.exception.nr); | |
3cfc3092 JK |
2178 | events->exception.nr = vcpu->arch.exception.nr; |
2179 | events->exception.has_error_code = vcpu->arch.exception.has_error_code; | |
2180 | events->exception.error_code = vcpu->arch.exception.error_code; | |
2181 | ||
03b82a30 JK |
2182 | events->interrupt.injected = |
2183 | vcpu->arch.interrupt.pending && !vcpu->arch.interrupt.soft; | |
3cfc3092 | 2184 | events->interrupt.nr = vcpu->arch.interrupt.nr; |
03b82a30 | 2185 | events->interrupt.soft = 0; |
48005f64 JK |
2186 | events->interrupt.shadow = |
2187 | kvm_x86_ops->get_interrupt_shadow(vcpu, | |
2188 | KVM_X86_SHADOW_INT_MOV_SS | KVM_X86_SHADOW_INT_STI); | |
3cfc3092 JK |
2189 | |
2190 | events->nmi.injected = vcpu->arch.nmi_injected; | |
2191 | events->nmi.pending = vcpu->arch.nmi_pending; | |
2192 | events->nmi.masked = kvm_x86_ops->get_nmi_mask(vcpu); | |
2193 | ||
2194 | events->sipi_vector = vcpu->arch.sipi_vector; | |
2195 | ||
dab4b911 | 2196 | events->flags = (KVM_VCPUEVENT_VALID_NMI_PENDING |
48005f64 JK |
2197 | | KVM_VCPUEVENT_VALID_SIPI_VECTOR |
2198 | | KVM_VCPUEVENT_VALID_SHADOW); | |
3cfc3092 JK |
2199 | |
2200 | vcpu_put(vcpu); | |
2201 | } | |
2202 | ||
2203 | static int kvm_vcpu_ioctl_x86_set_vcpu_events(struct kvm_vcpu *vcpu, | |
2204 | struct kvm_vcpu_events *events) | |
2205 | { | |
dab4b911 | 2206 | if (events->flags & ~(KVM_VCPUEVENT_VALID_NMI_PENDING |
48005f64 JK |
2207 | | KVM_VCPUEVENT_VALID_SIPI_VECTOR |
2208 | | KVM_VCPUEVENT_VALID_SHADOW)) | |
3cfc3092 JK |
2209 | return -EINVAL; |
2210 | ||
2211 | vcpu_load(vcpu); | |
2212 | ||
2213 | vcpu->arch.exception.pending = events->exception.injected; | |
2214 | vcpu->arch.exception.nr = events->exception.nr; | |
2215 | vcpu->arch.exception.has_error_code = events->exception.has_error_code; | |
2216 | vcpu->arch.exception.error_code = events->exception.error_code; | |
2217 | ||
2218 | vcpu->arch.interrupt.pending = events->interrupt.injected; | |
2219 | vcpu->arch.interrupt.nr = events->interrupt.nr; | |
2220 | vcpu->arch.interrupt.soft = events->interrupt.soft; | |
2221 | if (vcpu->arch.interrupt.pending && irqchip_in_kernel(vcpu->kvm)) | |
2222 | kvm_pic_clear_isr_ack(vcpu->kvm); | |
48005f64 JK |
2223 | if (events->flags & KVM_VCPUEVENT_VALID_SHADOW) |
2224 | kvm_x86_ops->set_interrupt_shadow(vcpu, | |
2225 | events->interrupt.shadow); | |
3cfc3092 JK |
2226 | |
2227 | vcpu->arch.nmi_injected = events->nmi.injected; | |
dab4b911 JK |
2228 | if (events->flags & KVM_VCPUEVENT_VALID_NMI_PENDING) |
2229 | vcpu->arch.nmi_pending = events->nmi.pending; | |
3cfc3092 JK |
2230 | kvm_x86_ops->set_nmi_mask(vcpu, events->nmi.masked); |
2231 | ||
dab4b911 JK |
2232 | if (events->flags & KVM_VCPUEVENT_VALID_SIPI_VECTOR) |
2233 | vcpu->arch.sipi_vector = events->sipi_vector; | |
3cfc3092 JK |
2234 | |
2235 | vcpu_put(vcpu); | |
2236 | ||
2237 | return 0; | |
2238 | } | |
2239 | ||
a1efbe77 JK |
2240 | static void kvm_vcpu_ioctl_x86_get_debugregs(struct kvm_vcpu *vcpu, |
2241 | struct kvm_debugregs *dbgregs) | |
2242 | { | |
2243 | vcpu_load(vcpu); | |
2244 | ||
2245 | memcpy(dbgregs->db, vcpu->arch.db, sizeof(vcpu->arch.db)); | |
2246 | dbgregs->dr6 = vcpu->arch.dr6; | |
2247 | dbgregs->dr7 = vcpu->arch.dr7; | |
2248 | dbgregs->flags = 0; | |
2249 | ||
2250 | vcpu_put(vcpu); | |
2251 | } | |
2252 | ||
2253 | static int kvm_vcpu_ioctl_x86_set_debugregs(struct kvm_vcpu *vcpu, | |
2254 | struct kvm_debugregs *dbgregs) | |
2255 | { | |
2256 | if (dbgregs->flags) | |
2257 | return -EINVAL; | |
2258 | ||
2259 | vcpu_load(vcpu); | |
2260 | ||
2261 | memcpy(vcpu->arch.db, dbgregs->db, sizeof(vcpu->arch.db)); | |
2262 | vcpu->arch.dr6 = dbgregs->dr6; | |
2263 | vcpu->arch.dr7 = dbgregs->dr7; | |
2264 | ||
2265 | vcpu_put(vcpu); | |
2266 | ||
2267 | return 0; | |
2268 | } | |
2269 | ||
313a3dc7 CO |
2270 | long kvm_arch_vcpu_ioctl(struct file *filp, |
2271 | unsigned int ioctl, unsigned long arg) | |
2272 | { | |
2273 | struct kvm_vcpu *vcpu = filp->private_data; | |
2274 | void __user *argp = (void __user *)arg; | |
2275 | int r; | |
b772ff36 | 2276 | struct kvm_lapic_state *lapic = NULL; |
313a3dc7 CO |
2277 | |
2278 | switch (ioctl) { | |
2279 | case KVM_GET_LAPIC: { | |
2204ae3c MT |
2280 | r = -EINVAL; |
2281 | if (!vcpu->arch.apic) | |
2282 | goto out; | |
b772ff36 | 2283 | lapic = kzalloc(sizeof(struct kvm_lapic_state), GFP_KERNEL); |
313a3dc7 | 2284 | |
b772ff36 DH |
2285 | r = -ENOMEM; |
2286 | if (!lapic) | |
2287 | goto out; | |
2288 | r = kvm_vcpu_ioctl_get_lapic(vcpu, lapic); | |
313a3dc7 CO |
2289 | if (r) |
2290 | goto out; | |
2291 | r = -EFAULT; | |
b772ff36 | 2292 | if (copy_to_user(argp, lapic, sizeof(struct kvm_lapic_state))) |
313a3dc7 CO |
2293 | goto out; |
2294 | r = 0; | |
2295 | break; | |
2296 | } | |
2297 | case KVM_SET_LAPIC: { | |
2204ae3c MT |
2298 | r = -EINVAL; |
2299 | if (!vcpu->arch.apic) | |
2300 | goto out; | |
b772ff36 DH |
2301 | lapic = kmalloc(sizeof(struct kvm_lapic_state), GFP_KERNEL); |
2302 | r = -ENOMEM; | |
2303 | if (!lapic) | |
2304 | goto out; | |
313a3dc7 | 2305 | r = -EFAULT; |
b772ff36 | 2306 | if (copy_from_user(lapic, argp, sizeof(struct kvm_lapic_state))) |
313a3dc7 | 2307 | goto out; |
b772ff36 | 2308 | r = kvm_vcpu_ioctl_set_lapic(vcpu, lapic); |
313a3dc7 CO |
2309 | if (r) |
2310 | goto out; | |
2311 | r = 0; | |
2312 | break; | |
2313 | } | |
f77bc6a4 ZX |
2314 | case KVM_INTERRUPT: { |
2315 | struct kvm_interrupt irq; | |
2316 | ||
2317 | r = -EFAULT; | |
2318 | if (copy_from_user(&irq, argp, sizeof irq)) | |
2319 | goto out; | |
2320 | r = kvm_vcpu_ioctl_interrupt(vcpu, &irq); | |
2321 | if (r) | |
2322 | goto out; | |
2323 | r = 0; | |
2324 | break; | |
2325 | } | |
c4abb7c9 JK |
2326 | case KVM_NMI: { |
2327 | r = kvm_vcpu_ioctl_nmi(vcpu); | |
2328 | if (r) | |
2329 | goto out; | |
2330 | r = 0; | |
2331 | break; | |
2332 | } | |
313a3dc7 CO |
2333 | case KVM_SET_CPUID: { |
2334 | struct kvm_cpuid __user *cpuid_arg = argp; | |
2335 | struct kvm_cpuid cpuid; | |
2336 | ||
2337 | r = -EFAULT; | |
2338 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
2339 | goto out; | |
2340 | r = kvm_vcpu_ioctl_set_cpuid(vcpu, &cpuid, cpuid_arg->entries); | |
2341 | if (r) | |
2342 | goto out; | |
2343 | break; | |
2344 | } | |
07716717 DK |
2345 | case KVM_SET_CPUID2: { |
2346 | struct kvm_cpuid2 __user *cpuid_arg = argp; | |
2347 | struct kvm_cpuid2 cpuid; | |
2348 | ||
2349 | r = -EFAULT; | |
2350 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
2351 | goto out; | |
2352 | r = kvm_vcpu_ioctl_set_cpuid2(vcpu, &cpuid, | |
19355475 | 2353 | cpuid_arg->entries); |
07716717 DK |
2354 | if (r) |
2355 | goto out; | |
2356 | break; | |
2357 | } | |
2358 | case KVM_GET_CPUID2: { | |
2359 | struct kvm_cpuid2 __user *cpuid_arg = argp; | |
2360 | struct kvm_cpuid2 cpuid; | |
2361 | ||
2362 | r = -EFAULT; | |
2363 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
2364 | goto out; | |
2365 | r = kvm_vcpu_ioctl_get_cpuid2(vcpu, &cpuid, | |
19355475 | 2366 | cpuid_arg->entries); |
07716717 DK |
2367 | if (r) |
2368 | goto out; | |
2369 | r = -EFAULT; | |
2370 | if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid)) | |
2371 | goto out; | |
2372 | r = 0; | |
2373 | break; | |
2374 | } | |
313a3dc7 CO |
2375 | case KVM_GET_MSRS: |
2376 | r = msr_io(vcpu, argp, kvm_get_msr, 1); | |
2377 | break; | |
2378 | case KVM_SET_MSRS: | |
2379 | r = msr_io(vcpu, argp, do_set_msr, 0); | |
2380 | break; | |
b209749f AK |
2381 | case KVM_TPR_ACCESS_REPORTING: { |
2382 | struct kvm_tpr_access_ctl tac; | |
2383 | ||
2384 | r = -EFAULT; | |
2385 | if (copy_from_user(&tac, argp, sizeof tac)) | |
2386 | goto out; | |
2387 | r = vcpu_ioctl_tpr_access_reporting(vcpu, &tac); | |
2388 | if (r) | |
2389 | goto out; | |
2390 | r = -EFAULT; | |
2391 | if (copy_to_user(argp, &tac, sizeof tac)) | |
2392 | goto out; | |
2393 | r = 0; | |
2394 | break; | |
2395 | }; | |
b93463aa AK |
2396 | case KVM_SET_VAPIC_ADDR: { |
2397 | struct kvm_vapic_addr va; | |
2398 | ||
2399 | r = -EINVAL; | |
2400 | if (!irqchip_in_kernel(vcpu->kvm)) | |
2401 | goto out; | |
2402 | r = -EFAULT; | |
2403 | if (copy_from_user(&va, argp, sizeof va)) | |
2404 | goto out; | |
2405 | r = 0; | |
2406 | kvm_lapic_set_vapic_addr(vcpu, va.vapic_addr); | |
2407 | break; | |
2408 | } | |
890ca9ae HY |
2409 | case KVM_X86_SETUP_MCE: { |
2410 | u64 mcg_cap; | |
2411 | ||
2412 | r = -EFAULT; | |
2413 | if (copy_from_user(&mcg_cap, argp, sizeof mcg_cap)) | |
2414 | goto out; | |
2415 | r = kvm_vcpu_ioctl_x86_setup_mce(vcpu, mcg_cap); | |
2416 | break; | |
2417 | } | |
2418 | case KVM_X86_SET_MCE: { | |
2419 | struct kvm_x86_mce mce; | |
2420 | ||
2421 | r = -EFAULT; | |
2422 | if (copy_from_user(&mce, argp, sizeof mce)) | |
2423 | goto out; | |
2424 | r = kvm_vcpu_ioctl_x86_set_mce(vcpu, &mce); | |
2425 | break; | |
2426 | } | |
3cfc3092 JK |
2427 | case KVM_GET_VCPU_EVENTS: { |
2428 | struct kvm_vcpu_events events; | |
2429 | ||
2430 | kvm_vcpu_ioctl_x86_get_vcpu_events(vcpu, &events); | |
2431 | ||
2432 | r = -EFAULT; | |
2433 | if (copy_to_user(argp, &events, sizeof(struct kvm_vcpu_events))) | |
2434 | break; | |
2435 | r = 0; | |
2436 | break; | |
2437 | } | |
2438 | case KVM_SET_VCPU_EVENTS: { | |
2439 | struct kvm_vcpu_events events; | |
2440 | ||
2441 | r = -EFAULT; | |
2442 | if (copy_from_user(&events, argp, sizeof(struct kvm_vcpu_events))) | |
2443 | break; | |
2444 | ||
2445 | r = kvm_vcpu_ioctl_x86_set_vcpu_events(vcpu, &events); | |
2446 | break; | |
2447 | } | |
a1efbe77 JK |
2448 | case KVM_GET_DEBUGREGS: { |
2449 | struct kvm_debugregs dbgregs; | |
2450 | ||
2451 | kvm_vcpu_ioctl_x86_get_debugregs(vcpu, &dbgregs); | |
2452 | ||
2453 | r = -EFAULT; | |
2454 | if (copy_to_user(argp, &dbgregs, | |
2455 | sizeof(struct kvm_debugregs))) | |
2456 | break; | |
2457 | r = 0; | |
2458 | break; | |
2459 | } | |
2460 | case KVM_SET_DEBUGREGS: { | |
2461 | struct kvm_debugregs dbgregs; | |
2462 | ||
2463 | r = -EFAULT; | |
2464 | if (copy_from_user(&dbgregs, argp, | |
2465 | sizeof(struct kvm_debugregs))) | |
2466 | break; | |
2467 | ||
2468 | r = kvm_vcpu_ioctl_x86_set_debugregs(vcpu, &dbgregs); | |
2469 | break; | |
2470 | } | |
313a3dc7 CO |
2471 | default: |
2472 | r = -EINVAL; | |
2473 | } | |
2474 | out: | |
7a6ce84c | 2475 | kfree(lapic); |
313a3dc7 CO |
2476 | return r; |
2477 | } | |
2478 | ||
1fe779f8 CO |
2479 | static int kvm_vm_ioctl_set_tss_addr(struct kvm *kvm, unsigned long addr) |
2480 | { | |
2481 | int ret; | |
2482 | ||
2483 | if (addr > (unsigned int)(-3 * PAGE_SIZE)) | |
2484 | return -1; | |
2485 | ret = kvm_x86_ops->set_tss_addr(kvm, addr); | |
2486 | return ret; | |
2487 | } | |
2488 | ||
b927a3ce SY |
2489 | static int kvm_vm_ioctl_set_identity_map_addr(struct kvm *kvm, |
2490 | u64 ident_addr) | |
2491 | { | |
2492 | kvm->arch.ept_identity_map_addr = ident_addr; | |
2493 | return 0; | |
2494 | } | |
2495 | ||
1fe779f8 CO |
2496 | static int kvm_vm_ioctl_set_nr_mmu_pages(struct kvm *kvm, |
2497 | u32 kvm_nr_mmu_pages) | |
2498 | { | |
2499 | if (kvm_nr_mmu_pages < KVM_MIN_ALLOC_MMU_PAGES) | |
2500 | return -EINVAL; | |
2501 | ||
79fac95e | 2502 | mutex_lock(&kvm->slots_lock); |
7c8a83b7 | 2503 | spin_lock(&kvm->mmu_lock); |
1fe779f8 CO |
2504 | |
2505 | kvm_mmu_change_mmu_pages(kvm, kvm_nr_mmu_pages); | |
f05e70ac | 2506 | kvm->arch.n_requested_mmu_pages = kvm_nr_mmu_pages; |
1fe779f8 | 2507 | |
7c8a83b7 | 2508 | spin_unlock(&kvm->mmu_lock); |
79fac95e | 2509 | mutex_unlock(&kvm->slots_lock); |
1fe779f8 CO |
2510 | return 0; |
2511 | } | |
2512 | ||
2513 | static int kvm_vm_ioctl_get_nr_mmu_pages(struct kvm *kvm) | |
2514 | { | |
f05e70ac | 2515 | return kvm->arch.n_alloc_mmu_pages; |
1fe779f8 CO |
2516 | } |
2517 | ||
a983fb23 MT |
2518 | gfn_t unalias_gfn_instantiation(struct kvm *kvm, gfn_t gfn) |
2519 | { | |
2520 | int i; | |
2521 | struct kvm_mem_alias *alias; | |
2522 | struct kvm_mem_aliases *aliases; | |
2523 | ||
90d83dc3 | 2524 | aliases = kvm_aliases(kvm); |
a983fb23 MT |
2525 | |
2526 | for (i = 0; i < aliases->naliases; ++i) { | |
2527 | alias = &aliases->aliases[i]; | |
2528 | if (alias->flags & KVM_ALIAS_INVALID) | |
2529 | continue; | |
2530 | if (gfn >= alias->base_gfn | |
2531 | && gfn < alias->base_gfn + alias->npages) | |
2532 | return alias->target_gfn + gfn - alias->base_gfn; | |
2533 | } | |
2534 | return gfn; | |
2535 | } | |
2536 | ||
e9f85cde ZX |
2537 | gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn) |
2538 | { | |
2539 | int i; | |
2540 | struct kvm_mem_alias *alias; | |
a983fb23 MT |
2541 | struct kvm_mem_aliases *aliases; |
2542 | ||
90d83dc3 | 2543 | aliases = kvm_aliases(kvm); |
e9f85cde | 2544 | |
fef9cce0 MT |
2545 | for (i = 0; i < aliases->naliases; ++i) { |
2546 | alias = &aliases->aliases[i]; | |
e9f85cde ZX |
2547 | if (gfn >= alias->base_gfn |
2548 | && gfn < alias->base_gfn + alias->npages) | |
2549 | return alias->target_gfn + gfn - alias->base_gfn; | |
2550 | } | |
2551 | return gfn; | |
2552 | } | |
2553 | ||
1fe779f8 CO |
2554 | /* |
2555 | * Set a new alias region. Aliases map a portion of physical memory into | |
2556 | * another portion. This is useful for memory windows, for example the PC | |
2557 | * VGA region. | |
2558 | */ | |
2559 | static int kvm_vm_ioctl_set_memory_alias(struct kvm *kvm, | |
2560 | struct kvm_memory_alias *alias) | |
2561 | { | |
2562 | int r, n; | |
2563 | struct kvm_mem_alias *p; | |
a983fb23 | 2564 | struct kvm_mem_aliases *aliases, *old_aliases; |
1fe779f8 CO |
2565 | |
2566 | r = -EINVAL; | |
2567 | /* General sanity checks */ | |
2568 | if (alias->memory_size & (PAGE_SIZE - 1)) | |
2569 | goto out; | |
2570 | if (alias->guest_phys_addr & (PAGE_SIZE - 1)) | |
2571 | goto out; | |
2572 | if (alias->slot >= KVM_ALIAS_SLOTS) | |
2573 | goto out; | |
2574 | if (alias->guest_phys_addr + alias->memory_size | |
2575 | < alias->guest_phys_addr) | |
2576 | goto out; | |
2577 | if (alias->target_phys_addr + alias->memory_size | |
2578 | < alias->target_phys_addr) | |
2579 | goto out; | |
2580 | ||
a983fb23 MT |
2581 | r = -ENOMEM; |
2582 | aliases = kzalloc(sizeof(struct kvm_mem_aliases), GFP_KERNEL); | |
2583 | if (!aliases) | |
2584 | goto out; | |
2585 | ||
79fac95e | 2586 | mutex_lock(&kvm->slots_lock); |
1fe779f8 | 2587 | |
a983fb23 MT |
2588 | /* invalidate any gfn reference in case of deletion/shrinking */ |
2589 | memcpy(aliases, kvm->arch.aliases, sizeof(struct kvm_mem_aliases)); | |
2590 | aliases->aliases[alias->slot].flags |= KVM_ALIAS_INVALID; | |
2591 | old_aliases = kvm->arch.aliases; | |
2592 | rcu_assign_pointer(kvm->arch.aliases, aliases); | |
2593 | synchronize_srcu_expedited(&kvm->srcu); | |
2594 | kvm_mmu_zap_all(kvm); | |
2595 | kfree(old_aliases); | |
2596 | ||
2597 | r = -ENOMEM; | |
2598 | aliases = kzalloc(sizeof(struct kvm_mem_aliases), GFP_KERNEL); | |
2599 | if (!aliases) | |
2600 | goto out_unlock; | |
2601 | ||
2602 | memcpy(aliases, kvm->arch.aliases, sizeof(struct kvm_mem_aliases)); | |
fef9cce0 MT |
2603 | |
2604 | p = &aliases->aliases[alias->slot]; | |
1fe779f8 CO |
2605 | p->base_gfn = alias->guest_phys_addr >> PAGE_SHIFT; |
2606 | p->npages = alias->memory_size >> PAGE_SHIFT; | |
2607 | p->target_gfn = alias->target_phys_addr >> PAGE_SHIFT; | |
a983fb23 | 2608 | p->flags &= ~(KVM_ALIAS_INVALID); |
1fe779f8 CO |
2609 | |
2610 | for (n = KVM_ALIAS_SLOTS; n > 0; --n) | |
fef9cce0 | 2611 | if (aliases->aliases[n - 1].npages) |
1fe779f8 | 2612 | break; |
fef9cce0 | 2613 | aliases->naliases = n; |
1fe779f8 | 2614 | |
a983fb23 MT |
2615 | old_aliases = kvm->arch.aliases; |
2616 | rcu_assign_pointer(kvm->arch.aliases, aliases); | |
2617 | synchronize_srcu_expedited(&kvm->srcu); | |
2618 | kfree(old_aliases); | |
2619 | r = 0; | |
1fe779f8 | 2620 | |
a983fb23 | 2621 | out_unlock: |
79fac95e | 2622 | mutex_unlock(&kvm->slots_lock); |
1fe779f8 CO |
2623 | out: |
2624 | return r; | |
2625 | } | |
2626 | ||
2627 | static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) | |
2628 | { | |
2629 | int r; | |
2630 | ||
2631 | r = 0; | |
2632 | switch (chip->chip_id) { | |
2633 | case KVM_IRQCHIP_PIC_MASTER: | |
2634 | memcpy(&chip->chip.pic, | |
2635 | &pic_irqchip(kvm)->pics[0], | |
2636 | sizeof(struct kvm_pic_state)); | |
2637 | break; | |
2638 | case KVM_IRQCHIP_PIC_SLAVE: | |
2639 | memcpy(&chip->chip.pic, | |
2640 | &pic_irqchip(kvm)->pics[1], | |
2641 | sizeof(struct kvm_pic_state)); | |
2642 | break; | |
2643 | case KVM_IRQCHIP_IOAPIC: | |
eba0226b | 2644 | r = kvm_get_ioapic(kvm, &chip->chip.ioapic); |
1fe779f8 CO |
2645 | break; |
2646 | default: | |
2647 | r = -EINVAL; | |
2648 | break; | |
2649 | } | |
2650 | return r; | |
2651 | } | |
2652 | ||
2653 | static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) | |
2654 | { | |
2655 | int r; | |
2656 | ||
2657 | r = 0; | |
2658 | switch (chip->chip_id) { | |
2659 | case KVM_IRQCHIP_PIC_MASTER: | |
fa8273e9 | 2660 | raw_spin_lock(&pic_irqchip(kvm)->lock); |
1fe779f8 CO |
2661 | memcpy(&pic_irqchip(kvm)->pics[0], |
2662 | &chip->chip.pic, | |
2663 | sizeof(struct kvm_pic_state)); | |
fa8273e9 | 2664 | raw_spin_unlock(&pic_irqchip(kvm)->lock); |
1fe779f8 CO |
2665 | break; |
2666 | case KVM_IRQCHIP_PIC_SLAVE: | |
fa8273e9 | 2667 | raw_spin_lock(&pic_irqchip(kvm)->lock); |
1fe779f8 CO |
2668 | memcpy(&pic_irqchip(kvm)->pics[1], |
2669 | &chip->chip.pic, | |
2670 | sizeof(struct kvm_pic_state)); | |
fa8273e9 | 2671 | raw_spin_unlock(&pic_irqchip(kvm)->lock); |
1fe779f8 CO |
2672 | break; |
2673 | case KVM_IRQCHIP_IOAPIC: | |
eba0226b | 2674 | r = kvm_set_ioapic(kvm, &chip->chip.ioapic); |
1fe779f8 CO |
2675 | break; |
2676 | default: | |
2677 | r = -EINVAL; | |
2678 | break; | |
2679 | } | |
2680 | kvm_pic_update_irq(pic_irqchip(kvm)); | |
2681 | return r; | |
2682 | } | |
2683 | ||
e0f63cb9 SY |
2684 | static int kvm_vm_ioctl_get_pit(struct kvm *kvm, struct kvm_pit_state *ps) |
2685 | { | |
2686 | int r = 0; | |
2687 | ||
894a9c55 | 2688 | mutex_lock(&kvm->arch.vpit->pit_state.lock); |
e0f63cb9 | 2689 | memcpy(ps, &kvm->arch.vpit->pit_state, sizeof(struct kvm_pit_state)); |
894a9c55 | 2690 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); |
e0f63cb9 SY |
2691 | return r; |
2692 | } | |
2693 | ||
2694 | static int kvm_vm_ioctl_set_pit(struct kvm *kvm, struct kvm_pit_state *ps) | |
2695 | { | |
2696 | int r = 0; | |
2697 | ||
894a9c55 | 2698 | mutex_lock(&kvm->arch.vpit->pit_state.lock); |
e0f63cb9 | 2699 | memcpy(&kvm->arch.vpit->pit_state, ps, sizeof(struct kvm_pit_state)); |
e9f42757 BK |
2700 | kvm_pit_load_count(kvm, 0, ps->channels[0].count, 0); |
2701 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); | |
2702 | return r; | |
2703 | } | |
2704 | ||
2705 | static int kvm_vm_ioctl_get_pit2(struct kvm *kvm, struct kvm_pit_state2 *ps) | |
2706 | { | |
2707 | int r = 0; | |
2708 | ||
2709 | mutex_lock(&kvm->arch.vpit->pit_state.lock); | |
2710 | memcpy(ps->channels, &kvm->arch.vpit->pit_state.channels, | |
2711 | sizeof(ps->channels)); | |
2712 | ps->flags = kvm->arch.vpit->pit_state.flags; | |
2713 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); | |
2714 | return r; | |
2715 | } | |
2716 | ||
2717 | static int kvm_vm_ioctl_set_pit2(struct kvm *kvm, struct kvm_pit_state2 *ps) | |
2718 | { | |
2719 | int r = 0, start = 0; | |
2720 | u32 prev_legacy, cur_legacy; | |
2721 | mutex_lock(&kvm->arch.vpit->pit_state.lock); | |
2722 | prev_legacy = kvm->arch.vpit->pit_state.flags & KVM_PIT_FLAGS_HPET_LEGACY; | |
2723 | cur_legacy = ps->flags & KVM_PIT_FLAGS_HPET_LEGACY; | |
2724 | if (!prev_legacy && cur_legacy) | |
2725 | start = 1; | |
2726 | memcpy(&kvm->arch.vpit->pit_state.channels, &ps->channels, | |
2727 | sizeof(kvm->arch.vpit->pit_state.channels)); | |
2728 | kvm->arch.vpit->pit_state.flags = ps->flags; | |
2729 | kvm_pit_load_count(kvm, 0, kvm->arch.vpit->pit_state.channels[0].count, start); | |
894a9c55 | 2730 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); |
e0f63cb9 SY |
2731 | return r; |
2732 | } | |
2733 | ||
52d939a0 MT |
2734 | static int kvm_vm_ioctl_reinject(struct kvm *kvm, |
2735 | struct kvm_reinject_control *control) | |
2736 | { | |
2737 | if (!kvm->arch.vpit) | |
2738 | return -ENXIO; | |
894a9c55 | 2739 | mutex_lock(&kvm->arch.vpit->pit_state.lock); |
52d939a0 | 2740 | kvm->arch.vpit->pit_state.pit_timer.reinject = control->pit_reinject; |
894a9c55 | 2741 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); |
52d939a0 MT |
2742 | return 0; |
2743 | } | |
2744 | ||
5bb064dc ZX |
2745 | /* |
2746 | * Get (and clear) the dirty memory log for a memory slot. | |
2747 | */ | |
2748 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, | |
2749 | struct kvm_dirty_log *log) | |
2750 | { | |
87bf6e7d | 2751 | int r, i; |
5bb064dc | 2752 | struct kvm_memory_slot *memslot; |
87bf6e7d | 2753 | unsigned long n; |
b050b015 MT |
2754 | unsigned long is_dirty = 0; |
2755 | unsigned long *dirty_bitmap = NULL; | |
5bb064dc | 2756 | |
79fac95e | 2757 | mutex_lock(&kvm->slots_lock); |
5bb064dc | 2758 | |
b050b015 MT |
2759 | r = -EINVAL; |
2760 | if (log->slot >= KVM_MEMORY_SLOTS) | |
2761 | goto out; | |
2762 | ||
2763 | memslot = &kvm->memslots->memslots[log->slot]; | |
2764 | r = -ENOENT; | |
2765 | if (!memslot->dirty_bitmap) | |
2766 | goto out; | |
2767 | ||
87bf6e7d | 2768 | n = kvm_dirty_bitmap_bytes(memslot); |
b050b015 MT |
2769 | |
2770 | r = -ENOMEM; | |
2771 | dirty_bitmap = vmalloc(n); | |
2772 | if (!dirty_bitmap) | |
5bb064dc | 2773 | goto out; |
b050b015 MT |
2774 | memset(dirty_bitmap, 0, n); |
2775 | ||
2776 | for (i = 0; !is_dirty && i < n/sizeof(long); i++) | |
2777 | is_dirty = memslot->dirty_bitmap[i]; | |
5bb064dc ZX |
2778 | |
2779 | /* If nothing is dirty, don't bother messing with page tables. */ | |
2780 | if (is_dirty) { | |
b050b015 MT |
2781 | struct kvm_memslots *slots, *old_slots; |
2782 | ||
7c8a83b7 | 2783 | spin_lock(&kvm->mmu_lock); |
5bb064dc | 2784 | kvm_mmu_slot_remove_write_access(kvm, log->slot); |
7c8a83b7 | 2785 | spin_unlock(&kvm->mmu_lock); |
b050b015 MT |
2786 | |
2787 | slots = kzalloc(sizeof(struct kvm_memslots), GFP_KERNEL); | |
2788 | if (!slots) | |
2789 | goto out_free; | |
2790 | ||
2791 | memcpy(slots, kvm->memslots, sizeof(struct kvm_memslots)); | |
2792 | slots->memslots[log->slot].dirty_bitmap = dirty_bitmap; | |
2793 | ||
2794 | old_slots = kvm->memslots; | |
2795 | rcu_assign_pointer(kvm->memslots, slots); | |
2796 | synchronize_srcu_expedited(&kvm->srcu); | |
2797 | dirty_bitmap = old_slots->memslots[log->slot].dirty_bitmap; | |
2798 | kfree(old_slots); | |
5bb064dc | 2799 | } |
b050b015 | 2800 | |
5bb064dc | 2801 | r = 0; |
b050b015 MT |
2802 | if (copy_to_user(log->dirty_bitmap, dirty_bitmap, n)) |
2803 | r = -EFAULT; | |
2804 | out_free: | |
2805 | vfree(dirty_bitmap); | |
5bb064dc | 2806 | out: |
79fac95e | 2807 | mutex_unlock(&kvm->slots_lock); |
5bb064dc ZX |
2808 | return r; |
2809 | } | |
2810 | ||
1fe779f8 CO |
2811 | long kvm_arch_vm_ioctl(struct file *filp, |
2812 | unsigned int ioctl, unsigned long arg) | |
2813 | { | |
2814 | struct kvm *kvm = filp->private_data; | |
2815 | void __user *argp = (void __user *)arg; | |
367e1319 | 2816 | int r = -ENOTTY; |
f0d66275 DH |
2817 | /* |
2818 | * This union makes it completely explicit to gcc-3.x | |
2819 | * that these two variables' stack usage should be | |
2820 | * combined, not added together. | |
2821 | */ | |
2822 | union { | |
2823 | struct kvm_pit_state ps; | |
e9f42757 | 2824 | struct kvm_pit_state2 ps2; |
f0d66275 | 2825 | struct kvm_memory_alias alias; |
c5ff41ce | 2826 | struct kvm_pit_config pit_config; |
f0d66275 | 2827 | } u; |
1fe779f8 CO |
2828 | |
2829 | switch (ioctl) { | |
2830 | case KVM_SET_TSS_ADDR: | |
2831 | r = kvm_vm_ioctl_set_tss_addr(kvm, arg); | |
2832 | if (r < 0) | |
2833 | goto out; | |
2834 | break; | |
b927a3ce SY |
2835 | case KVM_SET_IDENTITY_MAP_ADDR: { |
2836 | u64 ident_addr; | |
2837 | ||
2838 | r = -EFAULT; | |
2839 | if (copy_from_user(&ident_addr, argp, sizeof ident_addr)) | |
2840 | goto out; | |
2841 | r = kvm_vm_ioctl_set_identity_map_addr(kvm, ident_addr); | |
2842 | if (r < 0) | |
2843 | goto out; | |
2844 | break; | |
2845 | } | |
1fe779f8 CO |
2846 | case KVM_SET_MEMORY_REGION: { |
2847 | struct kvm_memory_region kvm_mem; | |
2848 | struct kvm_userspace_memory_region kvm_userspace_mem; | |
2849 | ||
2850 | r = -EFAULT; | |
2851 | if (copy_from_user(&kvm_mem, argp, sizeof kvm_mem)) | |
2852 | goto out; | |
2853 | kvm_userspace_mem.slot = kvm_mem.slot; | |
2854 | kvm_userspace_mem.flags = kvm_mem.flags; | |
2855 | kvm_userspace_mem.guest_phys_addr = kvm_mem.guest_phys_addr; | |
2856 | kvm_userspace_mem.memory_size = kvm_mem.memory_size; | |
2857 | r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_userspace_mem, 0); | |
2858 | if (r) | |
2859 | goto out; | |
2860 | break; | |
2861 | } | |
2862 | case KVM_SET_NR_MMU_PAGES: | |
2863 | r = kvm_vm_ioctl_set_nr_mmu_pages(kvm, arg); | |
2864 | if (r) | |
2865 | goto out; | |
2866 | break; | |
2867 | case KVM_GET_NR_MMU_PAGES: | |
2868 | r = kvm_vm_ioctl_get_nr_mmu_pages(kvm); | |
2869 | break; | |
f0d66275 | 2870 | case KVM_SET_MEMORY_ALIAS: |
1fe779f8 | 2871 | r = -EFAULT; |
f0d66275 | 2872 | if (copy_from_user(&u.alias, argp, sizeof(struct kvm_memory_alias))) |
1fe779f8 | 2873 | goto out; |
f0d66275 | 2874 | r = kvm_vm_ioctl_set_memory_alias(kvm, &u.alias); |
1fe779f8 CO |
2875 | if (r) |
2876 | goto out; | |
2877 | break; | |
3ddea128 MT |
2878 | case KVM_CREATE_IRQCHIP: { |
2879 | struct kvm_pic *vpic; | |
2880 | ||
2881 | mutex_lock(&kvm->lock); | |
2882 | r = -EEXIST; | |
2883 | if (kvm->arch.vpic) | |
2884 | goto create_irqchip_unlock; | |
1fe779f8 | 2885 | r = -ENOMEM; |
3ddea128 MT |
2886 | vpic = kvm_create_pic(kvm); |
2887 | if (vpic) { | |
1fe779f8 CO |
2888 | r = kvm_ioapic_init(kvm); |
2889 | if (r) { | |
72bb2fcd WY |
2890 | kvm_io_bus_unregister_dev(kvm, KVM_PIO_BUS, |
2891 | &vpic->dev); | |
3ddea128 MT |
2892 | kfree(vpic); |
2893 | goto create_irqchip_unlock; | |
1fe779f8 CO |
2894 | } |
2895 | } else | |
3ddea128 MT |
2896 | goto create_irqchip_unlock; |
2897 | smp_wmb(); | |
2898 | kvm->arch.vpic = vpic; | |
2899 | smp_wmb(); | |
399ec807 AK |
2900 | r = kvm_setup_default_irq_routing(kvm); |
2901 | if (r) { | |
3ddea128 | 2902 | mutex_lock(&kvm->irq_lock); |
72bb2fcd WY |
2903 | kvm_ioapic_destroy(kvm); |
2904 | kvm_destroy_pic(kvm); | |
3ddea128 | 2905 | mutex_unlock(&kvm->irq_lock); |
399ec807 | 2906 | } |
3ddea128 MT |
2907 | create_irqchip_unlock: |
2908 | mutex_unlock(&kvm->lock); | |
1fe779f8 | 2909 | break; |
3ddea128 | 2910 | } |
7837699f | 2911 | case KVM_CREATE_PIT: |
c5ff41ce JK |
2912 | u.pit_config.flags = KVM_PIT_SPEAKER_DUMMY; |
2913 | goto create_pit; | |
2914 | case KVM_CREATE_PIT2: | |
2915 | r = -EFAULT; | |
2916 | if (copy_from_user(&u.pit_config, argp, | |
2917 | sizeof(struct kvm_pit_config))) | |
2918 | goto out; | |
2919 | create_pit: | |
79fac95e | 2920 | mutex_lock(&kvm->slots_lock); |
269e05e4 AK |
2921 | r = -EEXIST; |
2922 | if (kvm->arch.vpit) | |
2923 | goto create_pit_unlock; | |
7837699f | 2924 | r = -ENOMEM; |
c5ff41ce | 2925 | kvm->arch.vpit = kvm_create_pit(kvm, u.pit_config.flags); |
7837699f SY |
2926 | if (kvm->arch.vpit) |
2927 | r = 0; | |
269e05e4 | 2928 | create_pit_unlock: |
79fac95e | 2929 | mutex_unlock(&kvm->slots_lock); |
7837699f | 2930 | break; |
4925663a | 2931 | case KVM_IRQ_LINE_STATUS: |
1fe779f8 CO |
2932 | case KVM_IRQ_LINE: { |
2933 | struct kvm_irq_level irq_event; | |
2934 | ||
2935 | r = -EFAULT; | |
2936 | if (copy_from_user(&irq_event, argp, sizeof irq_event)) | |
2937 | goto out; | |
160d2f6c | 2938 | r = -ENXIO; |
1fe779f8 | 2939 | if (irqchip_in_kernel(kvm)) { |
4925663a | 2940 | __s32 status; |
4925663a GN |
2941 | status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID, |
2942 | irq_event.irq, irq_event.level); | |
4925663a | 2943 | if (ioctl == KVM_IRQ_LINE_STATUS) { |
160d2f6c | 2944 | r = -EFAULT; |
4925663a GN |
2945 | irq_event.status = status; |
2946 | if (copy_to_user(argp, &irq_event, | |
2947 | sizeof irq_event)) | |
2948 | goto out; | |
2949 | } | |
1fe779f8 CO |
2950 | r = 0; |
2951 | } | |
2952 | break; | |
2953 | } | |
2954 | case KVM_GET_IRQCHIP: { | |
2955 | /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ | |
f0d66275 | 2956 | struct kvm_irqchip *chip = kmalloc(sizeof(*chip), GFP_KERNEL); |
1fe779f8 | 2957 | |
f0d66275 DH |
2958 | r = -ENOMEM; |
2959 | if (!chip) | |
1fe779f8 | 2960 | goto out; |
f0d66275 DH |
2961 | r = -EFAULT; |
2962 | if (copy_from_user(chip, argp, sizeof *chip)) | |
2963 | goto get_irqchip_out; | |
1fe779f8 CO |
2964 | r = -ENXIO; |
2965 | if (!irqchip_in_kernel(kvm)) | |
f0d66275 DH |
2966 | goto get_irqchip_out; |
2967 | r = kvm_vm_ioctl_get_irqchip(kvm, chip); | |
1fe779f8 | 2968 | if (r) |
f0d66275 | 2969 | goto get_irqchip_out; |
1fe779f8 | 2970 | r = -EFAULT; |
f0d66275 DH |
2971 | if (copy_to_user(argp, chip, sizeof *chip)) |
2972 | goto get_irqchip_out; | |
1fe779f8 | 2973 | r = 0; |
f0d66275 DH |
2974 | get_irqchip_out: |
2975 | kfree(chip); | |
2976 | if (r) | |
2977 | goto out; | |
1fe779f8 CO |
2978 | break; |
2979 | } | |
2980 | case KVM_SET_IRQCHIP: { | |
2981 | /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ | |
f0d66275 | 2982 | struct kvm_irqchip *chip = kmalloc(sizeof(*chip), GFP_KERNEL); |
1fe779f8 | 2983 | |
f0d66275 DH |
2984 | r = -ENOMEM; |
2985 | if (!chip) | |
1fe779f8 | 2986 | goto out; |
f0d66275 DH |
2987 | r = -EFAULT; |
2988 | if (copy_from_user(chip, argp, sizeof *chip)) | |
2989 | goto set_irqchip_out; | |
1fe779f8 CO |
2990 | r = -ENXIO; |
2991 | if (!irqchip_in_kernel(kvm)) | |
f0d66275 DH |
2992 | goto set_irqchip_out; |
2993 | r = kvm_vm_ioctl_set_irqchip(kvm, chip); | |
1fe779f8 | 2994 | if (r) |
f0d66275 | 2995 | goto set_irqchip_out; |
1fe779f8 | 2996 | r = 0; |
f0d66275 DH |
2997 | set_irqchip_out: |
2998 | kfree(chip); | |
2999 | if (r) | |
3000 | goto out; | |
1fe779f8 CO |
3001 | break; |
3002 | } | |
e0f63cb9 | 3003 | case KVM_GET_PIT: { |
e0f63cb9 | 3004 | r = -EFAULT; |
f0d66275 | 3005 | if (copy_from_user(&u.ps, argp, sizeof(struct kvm_pit_state))) |
e0f63cb9 SY |
3006 | goto out; |
3007 | r = -ENXIO; | |
3008 | if (!kvm->arch.vpit) | |
3009 | goto out; | |
f0d66275 | 3010 | r = kvm_vm_ioctl_get_pit(kvm, &u.ps); |
e0f63cb9 SY |
3011 | if (r) |
3012 | goto out; | |
3013 | r = -EFAULT; | |
f0d66275 | 3014 | if (copy_to_user(argp, &u.ps, sizeof(struct kvm_pit_state))) |
e0f63cb9 SY |
3015 | goto out; |
3016 | r = 0; | |
3017 | break; | |
3018 | } | |
3019 | case KVM_SET_PIT: { | |
e0f63cb9 | 3020 | r = -EFAULT; |
f0d66275 | 3021 | if (copy_from_user(&u.ps, argp, sizeof u.ps)) |
e0f63cb9 SY |
3022 | goto out; |
3023 | r = -ENXIO; | |
3024 | if (!kvm->arch.vpit) | |
3025 | goto out; | |
f0d66275 | 3026 | r = kvm_vm_ioctl_set_pit(kvm, &u.ps); |
e0f63cb9 SY |
3027 | if (r) |
3028 | goto out; | |
3029 | r = 0; | |
3030 | break; | |
3031 | } | |
e9f42757 BK |
3032 | case KVM_GET_PIT2: { |
3033 | r = -ENXIO; | |
3034 | if (!kvm->arch.vpit) | |
3035 | goto out; | |
3036 | r = kvm_vm_ioctl_get_pit2(kvm, &u.ps2); | |
3037 | if (r) | |
3038 | goto out; | |
3039 | r = -EFAULT; | |
3040 | if (copy_to_user(argp, &u.ps2, sizeof(u.ps2))) | |
3041 | goto out; | |
3042 | r = 0; | |
3043 | break; | |
3044 | } | |
3045 | case KVM_SET_PIT2: { | |
3046 | r = -EFAULT; | |
3047 | if (copy_from_user(&u.ps2, argp, sizeof(u.ps2))) | |
3048 | goto out; | |
3049 | r = -ENXIO; | |
3050 | if (!kvm->arch.vpit) | |
3051 | goto out; | |
3052 | r = kvm_vm_ioctl_set_pit2(kvm, &u.ps2); | |
3053 | if (r) | |
3054 | goto out; | |
3055 | r = 0; | |
3056 | break; | |
3057 | } | |
52d939a0 MT |
3058 | case KVM_REINJECT_CONTROL: { |
3059 | struct kvm_reinject_control control; | |
3060 | r = -EFAULT; | |
3061 | if (copy_from_user(&control, argp, sizeof(control))) | |
3062 | goto out; | |
3063 | r = kvm_vm_ioctl_reinject(kvm, &control); | |
3064 | if (r) | |
3065 | goto out; | |
3066 | r = 0; | |
3067 | break; | |
3068 | } | |
ffde22ac ES |
3069 | case KVM_XEN_HVM_CONFIG: { |
3070 | r = -EFAULT; | |
3071 | if (copy_from_user(&kvm->arch.xen_hvm_config, argp, | |
3072 | sizeof(struct kvm_xen_hvm_config))) | |
3073 | goto out; | |
3074 | r = -EINVAL; | |
3075 | if (kvm->arch.xen_hvm_config.flags) | |
3076 | goto out; | |
3077 | r = 0; | |
3078 | break; | |
3079 | } | |
afbcf7ab GC |
3080 | case KVM_SET_CLOCK: { |
3081 | struct timespec now; | |
3082 | struct kvm_clock_data user_ns; | |
3083 | u64 now_ns; | |
3084 | s64 delta; | |
3085 | ||
3086 | r = -EFAULT; | |
3087 | if (copy_from_user(&user_ns, argp, sizeof(user_ns))) | |
3088 | goto out; | |
3089 | ||
3090 | r = -EINVAL; | |
3091 | if (user_ns.flags) | |
3092 | goto out; | |
3093 | ||
3094 | r = 0; | |
3095 | ktime_get_ts(&now); | |
3096 | now_ns = timespec_to_ns(&now); | |
3097 | delta = user_ns.clock - now_ns; | |
3098 | kvm->arch.kvmclock_offset = delta; | |
3099 | break; | |
3100 | } | |
3101 | case KVM_GET_CLOCK: { | |
3102 | struct timespec now; | |
3103 | struct kvm_clock_data user_ns; | |
3104 | u64 now_ns; | |
3105 | ||
3106 | ktime_get_ts(&now); | |
3107 | now_ns = timespec_to_ns(&now); | |
3108 | user_ns.clock = kvm->arch.kvmclock_offset + now_ns; | |
3109 | user_ns.flags = 0; | |
3110 | ||
3111 | r = -EFAULT; | |
3112 | if (copy_to_user(argp, &user_ns, sizeof(user_ns))) | |
3113 | goto out; | |
3114 | r = 0; | |
3115 | break; | |
3116 | } | |
3117 | ||
1fe779f8 CO |
3118 | default: |
3119 | ; | |
3120 | } | |
3121 | out: | |
3122 | return r; | |
3123 | } | |
3124 | ||
a16b043c | 3125 | static void kvm_init_msr_list(void) |
043405e1 CO |
3126 | { |
3127 | u32 dummy[2]; | |
3128 | unsigned i, j; | |
3129 | ||
e3267cbb GC |
3130 | /* skip the first msrs in the list. KVM-specific */ |
3131 | for (i = j = KVM_SAVE_MSRS_BEGIN; i < ARRAY_SIZE(msrs_to_save); i++) { | |
043405e1 CO |
3132 | if (rdmsr_safe(msrs_to_save[i], &dummy[0], &dummy[1]) < 0) |
3133 | continue; | |
3134 | if (j < i) | |
3135 | msrs_to_save[j] = msrs_to_save[i]; | |
3136 | j++; | |
3137 | } | |
3138 | num_msrs_to_save = j; | |
3139 | } | |
3140 | ||
bda9020e MT |
3141 | static int vcpu_mmio_write(struct kvm_vcpu *vcpu, gpa_t addr, int len, |
3142 | const void *v) | |
bbd9b64e | 3143 | { |
bda9020e MT |
3144 | if (vcpu->arch.apic && |
3145 | !kvm_iodevice_write(&vcpu->arch.apic->dev, addr, len, v)) | |
3146 | return 0; | |
bbd9b64e | 3147 | |
e93f8a0f | 3148 | return kvm_io_bus_write(vcpu->kvm, KVM_MMIO_BUS, addr, len, v); |
bbd9b64e CO |
3149 | } |
3150 | ||
bda9020e | 3151 | static int vcpu_mmio_read(struct kvm_vcpu *vcpu, gpa_t addr, int len, void *v) |
bbd9b64e | 3152 | { |
bda9020e MT |
3153 | if (vcpu->arch.apic && |
3154 | !kvm_iodevice_read(&vcpu->arch.apic->dev, addr, len, v)) | |
3155 | return 0; | |
bbd9b64e | 3156 | |
e93f8a0f | 3157 | return kvm_io_bus_read(vcpu->kvm, KVM_MMIO_BUS, addr, len, v); |
bbd9b64e CO |
3158 | } |
3159 | ||
2dafc6c2 GN |
3160 | static void kvm_set_segment(struct kvm_vcpu *vcpu, |
3161 | struct kvm_segment *var, int seg) | |
3162 | { | |
3163 | kvm_x86_ops->set_segment(vcpu, var, seg); | |
3164 | } | |
3165 | ||
3166 | void kvm_get_segment(struct kvm_vcpu *vcpu, | |
3167 | struct kvm_segment *var, int seg) | |
3168 | { | |
3169 | kvm_x86_ops->get_segment(vcpu, var, seg); | |
3170 | } | |
3171 | ||
1871c602 GN |
3172 | gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva, u32 *error) |
3173 | { | |
3174 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
3175 | return vcpu->arch.mmu.gva_to_gpa(vcpu, gva, access, error); | |
3176 | } | |
3177 | ||
3178 | gpa_t kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu *vcpu, gva_t gva, u32 *error) | |
3179 | { | |
3180 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
3181 | access |= PFERR_FETCH_MASK; | |
3182 | return vcpu->arch.mmu.gva_to_gpa(vcpu, gva, access, error); | |
3183 | } | |
3184 | ||
3185 | gpa_t kvm_mmu_gva_to_gpa_write(struct kvm_vcpu *vcpu, gva_t gva, u32 *error) | |
3186 | { | |
3187 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
3188 | access |= PFERR_WRITE_MASK; | |
3189 | return vcpu->arch.mmu.gva_to_gpa(vcpu, gva, access, error); | |
3190 | } | |
3191 | ||
3192 | /* uses this to access any guest's mapped memory without checking CPL */ | |
3193 | gpa_t kvm_mmu_gva_to_gpa_system(struct kvm_vcpu *vcpu, gva_t gva, u32 *error) | |
3194 | { | |
3195 | return vcpu->arch.mmu.gva_to_gpa(vcpu, gva, 0, error); | |
3196 | } | |
3197 | ||
3198 | static int kvm_read_guest_virt_helper(gva_t addr, void *val, unsigned int bytes, | |
3199 | struct kvm_vcpu *vcpu, u32 access, | |
3200 | u32 *error) | |
bbd9b64e CO |
3201 | { |
3202 | void *data = val; | |
10589a46 | 3203 | int r = X86EMUL_CONTINUE; |
bbd9b64e CO |
3204 | |
3205 | while (bytes) { | |
1871c602 | 3206 | gpa_t gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr, access, error); |
bbd9b64e | 3207 | unsigned offset = addr & (PAGE_SIZE-1); |
77c2002e | 3208 | unsigned toread = min(bytes, (unsigned)PAGE_SIZE - offset); |
bbd9b64e CO |
3209 | int ret; |
3210 | ||
10589a46 MT |
3211 | if (gpa == UNMAPPED_GVA) { |
3212 | r = X86EMUL_PROPAGATE_FAULT; | |
3213 | goto out; | |
3214 | } | |
77c2002e | 3215 | ret = kvm_read_guest(vcpu->kvm, gpa, data, toread); |
10589a46 MT |
3216 | if (ret < 0) { |
3217 | r = X86EMUL_UNHANDLEABLE; | |
3218 | goto out; | |
3219 | } | |
bbd9b64e | 3220 | |
77c2002e IE |
3221 | bytes -= toread; |
3222 | data += toread; | |
3223 | addr += toread; | |
bbd9b64e | 3224 | } |
10589a46 | 3225 | out: |
10589a46 | 3226 | return r; |
bbd9b64e | 3227 | } |
77c2002e | 3228 | |
1871c602 GN |
3229 | /* used for instruction fetching */ |
3230 | static int kvm_fetch_guest_virt(gva_t addr, void *val, unsigned int bytes, | |
3231 | struct kvm_vcpu *vcpu, u32 *error) | |
3232 | { | |
3233 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
3234 | return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, | |
3235 | access | PFERR_FETCH_MASK, error); | |
3236 | } | |
3237 | ||
3238 | static int kvm_read_guest_virt(gva_t addr, void *val, unsigned int bytes, | |
3239 | struct kvm_vcpu *vcpu, u32 *error) | |
3240 | { | |
3241 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
3242 | return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, access, | |
3243 | error); | |
3244 | } | |
3245 | ||
3246 | static int kvm_read_guest_virt_system(gva_t addr, void *val, unsigned int bytes, | |
3247 | struct kvm_vcpu *vcpu, u32 *error) | |
3248 | { | |
3249 | return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, 0, error); | |
3250 | } | |
3251 | ||
7972995b | 3252 | static int kvm_write_guest_virt_system(gva_t addr, void *val, |
2dafc6c2 | 3253 | unsigned int bytes, |
7972995b | 3254 | struct kvm_vcpu *vcpu, |
2dafc6c2 | 3255 | u32 *error) |
77c2002e IE |
3256 | { |
3257 | void *data = val; | |
3258 | int r = X86EMUL_CONTINUE; | |
3259 | ||
3260 | while (bytes) { | |
7972995b GN |
3261 | gpa_t gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr, |
3262 | PFERR_WRITE_MASK, error); | |
77c2002e IE |
3263 | unsigned offset = addr & (PAGE_SIZE-1); |
3264 | unsigned towrite = min(bytes, (unsigned)PAGE_SIZE - offset); | |
3265 | int ret; | |
3266 | ||
3267 | if (gpa == UNMAPPED_GVA) { | |
3268 | r = X86EMUL_PROPAGATE_FAULT; | |
3269 | goto out; | |
3270 | } | |
3271 | ret = kvm_write_guest(vcpu->kvm, gpa, data, towrite); | |
3272 | if (ret < 0) { | |
3273 | r = X86EMUL_UNHANDLEABLE; | |
3274 | goto out; | |
3275 | } | |
3276 | ||
3277 | bytes -= towrite; | |
3278 | data += towrite; | |
3279 | addr += towrite; | |
3280 | } | |
3281 | out: | |
3282 | return r; | |
3283 | } | |
3284 | ||
bbd9b64e CO |
3285 | static int emulator_read_emulated(unsigned long addr, |
3286 | void *val, | |
3287 | unsigned int bytes, | |
3288 | struct kvm_vcpu *vcpu) | |
3289 | { | |
bbd9b64e | 3290 | gpa_t gpa; |
1871c602 | 3291 | u32 error_code; |
bbd9b64e CO |
3292 | |
3293 | if (vcpu->mmio_read_completed) { | |
3294 | memcpy(val, vcpu->mmio_data, bytes); | |
aec51dc4 AK |
3295 | trace_kvm_mmio(KVM_TRACE_MMIO_READ, bytes, |
3296 | vcpu->mmio_phys_addr, *(u64 *)val); | |
bbd9b64e CO |
3297 | vcpu->mmio_read_completed = 0; |
3298 | return X86EMUL_CONTINUE; | |
3299 | } | |
3300 | ||
1871c602 GN |
3301 | gpa = kvm_mmu_gva_to_gpa_read(vcpu, addr, &error_code); |
3302 | ||
3303 | if (gpa == UNMAPPED_GVA) { | |
3304 | kvm_inject_page_fault(vcpu, addr, error_code); | |
3305 | return X86EMUL_PROPAGATE_FAULT; | |
3306 | } | |
bbd9b64e CO |
3307 | |
3308 | /* For APIC access vmexit */ | |
3309 | if ((gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) | |
3310 | goto mmio; | |
3311 | ||
1871c602 | 3312 | if (kvm_read_guest_virt(addr, val, bytes, vcpu, NULL) |
77c2002e | 3313 | == X86EMUL_CONTINUE) |
bbd9b64e | 3314 | return X86EMUL_CONTINUE; |
bbd9b64e CO |
3315 | |
3316 | mmio: | |
3317 | /* | |
3318 | * Is this MMIO handled locally? | |
3319 | */ | |
aec51dc4 AK |
3320 | if (!vcpu_mmio_read(vcpu, gpa, bytes, val)) { |
3321 | trace_kvm_mmio(KVM_TRACE_MMIO_READ, bytes, gpa, *(u64 *)val); | |
bbd9b64e CO |
3322 | return X86EMUL_CONTINUE; |
3323 | } | |
aec51dc4 AK |
3324 | |
3325 | trace_kvm_mmio(KVM_TRACE_MMIO_READ_UNSATISFIED, bytes, gpa, 0); | |
bbd9b64e CO |
3326 | |
3327 | vcpu->mmio_needed = 1; | |
3328 | vcpu->mmio_phys_addr = gpa; | |
3329 | vcpu->mmio_size = bytes; | |
3330 | vcpu->mmio_is_write = 0; | |
3331 | ||
3332 | return X86EMUL_UNHANDLEABLE; | |
3333 | } | |
3334 | ||
3200f405 | 3335 | int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa, |
9f811285 | 3336 | const void *val, int bytes) |
bbd9b64e CO |
3337 | { |
3338 | int ret; | |
3339 | ||
3340 | ret = kvm_write_guest(vcpu->kvm, gpa, val, bytes); | |
9f811285 | 3341 | if (ret < 0) |
bbd9b64e | 3342 | return 0; |
ad218f85 | 3343 | kvm_mmu_pte_write(vcpu, gpa, val, bytes, 1); |
bbd9b64e CO |
3344 | return 1; |
3345 | } | |
3346 | ||
3347 | static int emulator_write_emulated_onepage(unsigned long addr, | |
3348 | const void *val, | |
3349 | unsigned int bytes, | |
8f6abd06 | 3350 | struct kvm_vcpu *vcpu) |
bbd9b64e | 3351 | { |
10589a46 | 3352 | gpa_t gpa; |
1871c602 | 3353 | u32 error_code; |
10589a46 | 3354 | |
1871c602 | 3355 | gpa = kvm_mmu_gva_to_gpa_write(vcpu, addr, &error_code); |
bbd9b64e CO |
3356 | |
3357 | if (gpa == UNMAPPED_GVA) { | |
1871c602 | 3358 | kvm_inject_page_fault(vcpu, addr, error_code); |
bbd9b64e CO |
3359 | return X86EMUL_PROPAGATE_FAULT; |
3360 | } | |
3361 | ||
3362 | /* For APIC access vmexit */ | |
3363 | if ((gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) | |
3364 | goto mmio; | |
3365 | ||
3366 | if (emulator_write_phys(vcpu, gpa, val, bytes)) | |
3367 | return X86EMUL_CONTINUE; | |
3368 | ||
3369 | mmio: | |
aec51dc4 | 3370 | trace_kvm_mmio(KVM_TRACE_MMIO_WRITE, bytes, gpa, *(u64 *)val); |
bbd9b64e CO |
3371 | /* |
3372 | * Is this MMIO handled locally? | |
3373 | */ | |
bda9020e | 3374 | if (!vcpu_mmio_write(vcpu, gpa, bytes, val)) |
bbd9b64e | 3375 | return X86EMUL_CONTINUE; |
bbd9b64e CO |
3376 | |
3377 | vcpu->mmio_needed = 1; | |
3378 | vcpu->mmio_phys_addr = gpa; | |
3379 | vcpu->mmio_size = bytes; | |
3380 | vcpu->mmio_is_write = 1; | |
3381 | memcpy(vcpu->mmio_data, val, bytes); | |
3382 | ||
3383 | return X86EMUL_CONTINUE; | |
3384 | } | |
3385 | ||
8f6abd06 GN |
3386 | int emulator_write_emulated(unsigned long addr, |
3387 | const void *val, | |
3388 | unsigned int bytes, | |
3389 | struct kvm_vcpu *vcpu) | |
bbd9b64e CO |
3390 | { |
3391 | /* Crossing a page boundary? */ | |
3392 | if (((addr + bytes - 1) ^ addr) & PAGE_MASK) { | |
3393 | int rc, now; | |
3394 | ||
3395 | now = -addr & ~PAGE_MASK; | |
8f6abd06 | 3396 | rc = emulator_write_emulated_onepage(addr, val, now, vcpu); |
bbd9b64e CO |
3397 | if (rc != X86EMUL_CONTINUE) |
3398 | return rc; | |
3399 | addr += now; | |
3400 | val += now; | |
3401 | bytes -= now; | |
3402 | } | |
8f6abd06 | 3403 | return emulator_write_emulated_onepage(addr, val, bytes, vcpu); |
bbd9b64e CO |
3404 | } |
3405 | EXPORT_SYMBOL_GPL(emulator_write_emulated); | |
3406 | ||
daea3e73 AK |
3407 | #define CMPXCHG_TYPE(t, ptr, old, new) \ |
3408 | (cmpxchg((t *)(ptr), *(t *)(old), *(t *)(new)) == *(t *)(old)) | |
3409 | ||
3410 | #ifdef CONFIG_X86_64 | |
3411 | # define CMPXCHG64(ptr, old, new) CMPXCHG_TYPE(u64, ptr, old, new) | |
3412 | #else | |
3413 | # define CMPXCHG64(ptr, old, new) \ | |
9749a6c0 | 3414 | (cmpxchg64((u64 *)(ptr), *(u64 *)(old), *(u64 *)(new)) == *(u64 *)(old)) |
daea3e73 AK |
3415 | #endif |
3416 | ||
bbd9b64e CO |
3417 | static int emulator_cmpxchg_emulated(unsigned long addr, |
3418 | const void *old, | |
3419 | const void *new, | |
3420 | unsigned int bytes, | |
3421 | struct kvm_vcpu *vcpu) | |
3422 | { | |
daea3e73 AK |
3423 | gpa_t gpa; |
3424 | struct page *page; | |
3425 | char *kaddr; | |
3426 | bool exchanged; | |
2bacc55c | 3427 | |
daea3e73 AK |
3428 | /* guests cmpxchg8b have to be emulated atomically */ |
3429 | if (bytes > 8 || (bytes & (bytes - 1))) | |
3430 | goto emul_write; | |
10589a46 | 3431 | |
daea3e73 | 3432 | gpa = kvm_mmu_gva_to_gpa_write(vcpu, addr, NULL); |
2bacc55c | 3433 | |
daea3e73 AK |
3434 | if (gpa == UNMAPPED_GVA || |
3435 | (gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) | |
3436 | goto emul_write; | |
2bacc55c | 3437 | |
daea3e73 AK |
3438 | if (((gpa + bytes - 1) & PAGE_MASK) != (gpa & PAGE_MASK)) |
3439 | goto emul_write; | |
72dc67a6 | 3440 | |
daea3e73 | 3441 | page = gfn_to_page(vcpu->kvm, gpa >> PAGE_SHIFT); |
72dc67a6 | 3442 | |
daea3e73 AK |
3443 | kaddr = kmap_atomic(page, KM_USER0); |
3444 | kaddr += offset_in_page(gpa); | |
3445 | switch (bytes) { | |
3446 | case 1: | |
3447 | exchanged = CMPXCHG_TYPE(u8, kaddr, old, new); | |
3448 | break; | |
3449 | case 2: | |
3450 | exchanged = CMPXCHG_TYPE(u16, kaddr, old, new); | |
3451 | break; | |
3452 | case 4: | |
3453 | exchanged = CMPXCHG_TYPE(u32, kaddr, old, new); | |
3454 | break; | |
3455 | case 8: | |
3456 | exchanged = CMPXCHG64(kaddr, old, new); | |
3457 | break; | |
3458 | default: | |
3459 | BUG(); | |
2bacc55c | 3460 | } |
daea3e73 AK |
3461 | kunmap_atomic(kaddr, KM_USER0); |
3462 | kvm_release_page_dirty(page); | |
3463 | ||
3464 | if (!exchanged) | |
3465 | return X86EMUL_CMPXCHG_FAILED; | |
3466 | ||
8f6abd06 GN |
3467 | kvm_mmu_pte_write(vcpu, gpa, new, bytes, 1); |
3468 | ||
3469 | return X86EMUL_CONTINUE; | |
4a5f48f6 | 3470 | |
3200f405 | 3471 | emul_write: |
daea3e73 | 3472 | printk_once(KERN_WARNING "kvm: emulating exchange as write\n"); |
2bacc55c | 3473 | |
bbd9b64e CO |
3474 | return emulator_write_emulated(addr, new, bytes, vcpu); |
3475 | } | |
3476 | ||
cf8f70bf GN |
3477 | static int kernel_pio(struct kvm_vcpu *vcpu, void *pd) |
3478 | { | |
3479 | /* TODO: String I/O for in kernel device */ | |
3480 | int r; | |
3481 | ||
3482 | if (vcpu->arch.pio.in) | |
3483 | r = kvm_io_bus_read(vcpu->kvm, KVM_PIO_BUS, vcpu->arch.pio.port, | |
3484 | vcpu->arch.pio.size, pd); | |
3485 | else | |
3486 | r = kvm_io_bus_write(vcpu->kvm, KVM_PIO_BUS, | |
3487 | vcpu->arch.pio.port, vcpu->arch.pio.size, | |
3488 | pd); | |
3489 | return r; | |
3490 | } | |
3491 | ||
3492 | ||
3493 | static int emulator_pio_in_emulated(int size, unsigned short port, void *val, | |
3494 | unsigned int count, struct kvm_vcpu *vcpu) | |
3495 | { | |
7972995b | 3496 | if (vcpu->arch.pio.count) |
cf8f70bf GN |
3497 | goto data_avail; |
3498 | ||
3499 | trace_kvm_pio(1, port, size, 1); | |
3500 | ||
3501 | vcpu->arch.pio.port = port; | |
3502 | vcpu->arch.pio.in = 1; | |
7972995b | 3503 | vcpu->arch.pio.count = count; |
cf8f70bf GN |
3504 | vcpu->arch.pio.size = size; |
3505 | ||
3506 | if (!kernel_pio(vcpu, vcpu->arch.pio_data)) { | |
3507 | data_avail: | |
3508 | memcpy(val, vcpu->arch.pio_data, size * count); | |
7972995b | 3509 | vcpu->arch.pio.count = 0; |
cf8f70bf GN |
3510 | return 1; |
3511 | } | |
3512 | ||
3513 | vcpu->run->exit_reason = KVM_EXIT_IO; | |
3514 | vcpu->run->io.direction = KVM_EXIT_IO_IN; | |
3515 | vcpu->run->io.size = size; | |
3516 | vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE; | |
3517 | vcpu->run->io.count = count; | |
3518 | vcpu->run->io.port = port; | |
3519 | ||
3520 | return 0; | |
3521 | } | |
3522 | ||
3523 | static int emulator_pio_out_emulated(int size, unsigned short port, | |
3524 | const void *val, unsigned int count, | |
3525 | struct kvm_vcpu *vcpu) | |
3526 | { | |
3527 | trace_kvm_pio(0, port, size, 1); | |
3528 | ||
3529 | vcpu->arch.pio.port = port; | |
3530 | vcpu->arch.pio.in = 0; | |
7972995b | 3531 | vcpu->arch.pio.count = count; |
cf8f70bf GN |
3532 | vcpu->arch.pio.size = size; |
3533 | ||
3534 | memcpy(vcpu->arch.pio_data, val, size * count); | |
3535 | ||
3536 | if (!kernel_pio(vcpu, vcpu->arch.pio_data)) { | |
7972995b | 3537 | vcpu->arch.pio.count = 0; |
cf8f70bf GN |
3538 | return 1; |
3539 | } | |
3540 | ||
3541 | vcpu->run->exit_reason = KVM_EXIT_IO; | |
3542 | vcpu->run->io.direction = KVM_EXIT_IO_OUT; | |
3543 | vcpu->run->io.size = size; | |
3544 | vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE; | |
3545 | vcpu->run->io.count = count; | |
3546 | vcpu->run->io.port = port; | |
3547 | ||
3548 | return 0; | |
3549 | } | |
3550 | ||
bbd9b64e CO |
3551 | static unsigned long get_segment_base(struct kvm_vcpu *vcpu, int seg) |
3552 | { | |
3553 | return kvm_x86_ops->get_segment_base(vcpu, seg); | |
3554 | } | |
3555 | ||
3556 | int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address) | |
3557 | { | |
a7052897 | 3558 | kvm_mmu_invlpg(vcpu, address); |
bbd9b64e CO |
3559 | return X86EMUL_CONTINUE; |
3560 | } | |
3561 | ||
3562 | int emulate_clts(struct kvm_vcpu *vcpu) | |
3563 | { | |
4d4ec087 | 3564 | kvm_x86_ops->set_cr0(vcpu, kvm_read_cr0_bits(vcpu, ~X86_CR0_TS)); |
6b52d186 | 3565 | kvm_x86_ops->fpu_activate(vcpu); |
bbd9b64e CO |
3566 | return X86EMUL_CONTINUE; |
3567 | } | |
3568 | ||
3569 | int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long *dest) | |
3570 | { | |
020df079 | 3571 | return kvm_get_dr(ctxt->vcpu, dr, dest); |
bbd9b64e CO |
3572 | } |
3573 | ||
3574 | int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long value) | |
3575 | { | |
3576 | unsigned long mask = (ctxt->mode == X86EMUL_MODE_PROT64) ? ~0ULL : ~0U; | |
bbd9b64e | 3577 | |
020df079 | 3578 | return kvm_set_dr(ctxt->vcpu, dr, value & mask); |
bbd9b64e CO |
3579 | } |
3580 | ||
3581 | void kvm_report_emulation_failure(struct kvm_vcpu *vcpu, const char *context) | |
3582 | { | |
bbd9b64e | 3583 | u8 opcodes[4]; |
5fdbf976 | 3584 | unsigned long rip = kvm_rip_read(vcpu); |
bbd9b64e CO |
3585 | unsigned long rip_linear; |
3586 | ||
f76c710d | 3587 | if (!printk_ratelimit()) |
bbd9b64e CO |
3588 | return; |
3589 | ||
25be4608 GC |
3590 | rip_linear = rip + get_segment_base(vcpu, VCPU_SREG_CS); |
3591 | ||
1871c602 | 3592 | kvm_read_guest_virt(rip_linear, (void *)opcodes, 4, vcpu, NULL); |
bbd9b64e CO |
3593 | |
3594 | printk(KERN_ERR "emulation failed (%s) rip %lx %02x %02x %02x %02x\n", | |
3595 | context, rip, opcodes[0], opcodes[1], opcodes[2], opcodes[3]); | |
bbd9b64e CO |
3596 | } |
3597 | EXPORT_SYMBOL_GPL(kvm_report_emulation_failure); | |
3598 | ||
52a46617 GN |
3599 | static u64 mk_cr_64(u64 curr_cr, u32 new_val) |
3600 | { | |
3601 | return (curr_cr & ~((1ULL << 32) - 1)) | new_val; | |
3602 | } | |
3603 | ||
3604 | static unsigned long emulator_get_cr(int cr, struct kvm_vcpu *vcpu) | |
3605 | { | |
3606 | unsigned long value; | |
3607 | ||
3608 | switch (cr) { | |
3609 | case 0: | |
3610 | value = kvm_read_cr0(vcpu); | |
3611 | break; | |
3612 | case 2: | |
3613 | value = vcpu->arch.cr2; | |
3614 | break; | |
3615 | case 3: | |
3616 | value = vcpu->arch.cr3; | |
3617 | break; | |
3618 | case 4: | |
3619 | value = kvm_read_cr4(vcpu); | |
3620 | break; | |
3621 | case 8: | |
3622 | value = kvm_get_cr8(vcpu); | |
3623 | break; | |
3624 | default: | |
3625 | vcpu_printf(vcpu, "%s: unexpected cr %u\n", __func__, cr); | |
3626 | return 0; | |
3627 | } | |
3628 | ||
3629 | return value; | |
3630 | } | |
3631 | ||
3632 | static void emulator_set_cr(int cr, unsigned long val, struct kvm_vcpu *vcpu) | |
3633 | { | |
3634 | switch (cr) { | |
3635 | case 0: | |
3636 | kvm_set_cr0(vcpu, mk_cr_64(kvm_read_cr0(vcpu), val)); | |
3637 | break; | |
3638 | case 2: | |
3639 | vcpu->arch.cr2 = val; | |
3640 | break; | |
3641 | case 3: | |
3642 | kvm_set_cr3(vcpu, val); | |
3643 | break; | |
3644 | case 4: | |
3645 | kvm_set_cr4(vcpu, mk_cr_64(kvm_read_cr4(vcpu), val)); | |
3646 | break; | |
3647 | case 8: | |
3648 | kvm_set_cr8(vcpu, val & 0xfUL); | |
3649 | break; | |
3650 | default: | |
3651 | vcpu_printf(vcpu, "%s: unexpected cr %u\n", __func__, cr); | |
3652 | } | |
3653 | } | |
3654 | ||
9c537244 GN |
3655 | static int emulator_get_cpl(struct kvm_vcpu *vcpu) |
3656 | { | |
3657 | return kvm_x86_ops->get_cpl(vcpu); | |
3658 | } | |
3659 | ||
2dafc6c2 GN |
3660 | static void emulator_get_gdt(struct desc_ptr *dt, struct kvm_vcpu *vcpu) |
3661 | { | |
3662 | kvm_x86_ops->get_gdt(vcpu, dt); | |
3663 | } | |
3664 | ||
3665 | static bool emulator_get_cached_descriptor(struct desc_struct *desc, int seg, | |
3666 | struct kvm_vcpu *vcpu) | |
3667 | { | |
3668 | struct kvm_segment var; | |
3669 | ||
3670 | kvm_get_segment(vcpu, &var, seg); | |
3671 | ||
3672 | if (var.unusable) | |
3673 | return false; | |
3674 | ||
3675 | if (var.g) | |
3676 | var.limit >>= 12; | |
3677 | set_desc_limit(desc, var.limit); | |
3678 | set_desc_base(desc, (unsigned long)var.base); | |
3679 | desc->type = var.type; | |
3680 | desc->s = var.s; | |
3681 | desc->dpl = var.dpl; | |
3682 | desc->p = var.present; | |
3683 | desc->avl = var.avl; | |
3684 | desc->l = var.l; | |
3685 | desc->d = var.db; | |
3686 | desc->g = var.g; | |
3687 | ||
3688 | return true; | |
3689 | } | |
3690 | ||
3691 | static void emulator_set_cached_descriptor(struct desc_struct *desc, int seg, | |
3692 | struct kvm_vcpu *vcpu) | |
3693 | { | |
3694 | struct kvm_segment var; | |
3695 | ||
3696 | /* needed to preserve selector */ | |
3697 | kvm_get_segment(vcpu, &var, seg); | |
3698 | ||
3699 | var.base = get_desc_base(desc); | |
3700 | var.limit = get_desc_limit(desc); | |
3701 | if (desc->g) | |
3702 | var.limit = (var.limit << 12) | 0xfff; | |
3703 | var.type = desc->type; | |
3704 | var.present = desc->p; | |
3705 | var.dpl = desc->dpl; | |
3706 | var.db = desc->d; | |
3707 | var.s = desc->s; | |
3708 | var.l = desc->l; | |
3709 | var.g = desc->g; | |
3710 | var.avl = desc->avl; | |
3711 | var.present = desc->p; | |
3712 | var.unusable = !var.present; | |
3713 | var.padding = 0; | |
3714 | ||
3715 | kvm_set_segment(vcpu, &var, seg); | |
3716 | return; | |
3717 | } | |
3718 | ||
3719 | static u16 emulator_get_segment_selector(int seg, struct kvm_vcpu *vcpu) | |
3720 | { | |
3721 | struct kvm_segment kvm_seg; | |
3722 | ||
3723 | kvm_get_segment(vcpu, &kvm_seg, seg); | |
3724 | return kvm_seg.selector; | |
3725 | } | |
3726 | ||
3727 | static void emulator_set_segment_selector(u16 sel, int seg, | |
3728 | struct kvm_vcpu *vcpu) | |
3729 | { | |
3730 | struct kvm_segment kvm_seg; | |
3731 | ||
3732 | kvm_get_segment(vcpu, &kvm_seg, seg); | |
3733 | kvm_seg.selector = sel; | |
3734 | kvm_set_segment(vcpu, &kvm_seg, seg); | |
3735 | } | |
3736 | ||
482ac18a GN |
3737 | static void emulator_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags) |
3738 | { | |
3739 | kvm_x86_ops->set_rflags(vcpu, rflags); | |
3740 | } | |
3741 | ||
14af3f3c | 3742 | static struct x86_emulate_ops emulate_ops = { |
1871c602 | 3743 | .read_std = kvm_read_guest_virt_system, |
2dafc6c2 | 3744 | .write_std = kvm_write_guest_virt_system, |
1871c602 | 3745 | .fetch = kvm_fetch_guest_virt, |
bbd9b64e CO |
3746 | .read_emulated = emulator_read_emulated, |
3747 | .write_emulated = emulator_write_emulated, | |
3748 | .cmpxchg_emulated = emulator_cmpxchg_emulated, | |
cf8f70bf GN |
3749 | .pio_in_emulated = emulator_pio_in_emulated, |
3750 | .pio_out_emulated = emulator_pio_out_emulated, | |
2dafc6c2 GN |
3751 | .get_cached_descriptor = emulator_get_cached_descriptor, |
3752 | .set_cached_descriptor = emulator_set_cached_descriptor, | |
3753 | .get_segment_selector = emulator_get_segment_selector, | |
3754 | .set_segment_selector = emulator_set_segment_selector, | |
3755 | .get_gdt = emulator_get_gdt, | |
52a46617 GN |
3756 | .get_cr = emulator_get_cr, |
3757 | .set_cr = emulator_set_cr, | |
9c537244 | 3758 | .cpl = emulator_get_cpl, |
482ac18a | 3759 | .set_rflags = emulator_set_rflags, |
bbd9b64e CO |
3760 | }; |
3761 | ||
5fdbf976 MT |
3762 | static void cache_all_regs(struct kvm_vcpu *vcpu) |
3763 | { | |
3764 | kvm_register_read(vcpu, VCPU_REGS_RAX); | |
3765 | kvm_register_read(vcpu, VCPU_REGS_RSP); | |
3766 | kvm_register_read(vcpu, VCPU_REGS_RIP); | |
3767 | vcpu->arch.regs_dirty = ~0; | |
3768 | } | |
3769 | ||
bbd9b64e | 3770 | int emulate_instruction(struct kvm_vcpu *vcpu, |
bbd9b64e CO |
3771 | unsigned long cr2, |
3772 | u16 error_code, | |
571008da | 3773 | int emulation_type) |
bbd9b64e | 3774 | { |
310b5d30 | 3775 | int r, shadow_mask; |
571008da | 3776 | struct decode_cache *c; |
851ba692 | 3777 | struct kvm_run *run = vcpu->run; |
bbd9b64e | 3778 | |
26eef70c | 3779 | kvm_clear_exception_queue(vcpu); |
ad312c7c | 3780 | vcpu->arch.mmio_fault_cr2 = cr2; |
5fdbf976 | 3781 | /* |
56e82318 | 3782 | * TODO: fix emulate.c to use guest_read/write_register |
5fdbf976 MT |
3783 | * instead of direct ->regs accesses, can save hundred cycles |
3784 | * on Intel for instructions that don't read/change RSP, for | |
3785 | * for example. | |
3786 | */ | |
3787 | cache_all_regs(vcpu); | |
bbd9b64e CO |
3788 | |
3789 | vcpu->mmio_is_write = 0; | |
bbd9b64e | 3790 | |
571008da | 3791 | if (!(emulation_type & EMULTYPE_NO_DECODE)) { |
bbd9b64e CO |
3792 | int cs_db, cs_l; |
3793 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); | |
3794 | ||
ad312c7c | 3795 | vcpu->arch.emulate_ctxt.vcpu = vcpu; |
83bf0002 | 3796 | vcpu->arch.emulate_ctxt.eflags = kvm_x86_ops->get_rflags(vcpu); |
063db061 | 3797 | vcpu->arch.emulate_ctxt.eip = kvm_rip_read(vcpu); |
ad312c7c | 3798 | vcpu->arch.emulate_ctxt.mode = |
a0044755 | 3799 | (!is_protmode(vcpu)) ? X86EMUL_MODE_REAL : |
ad312c7c | 3800 | (vcpu->arch.emulate_ctxt.eflags & X86_EFLAGS_VM) |
a0044755 | 3801 | ? X86EMUL_MODE_VM86 : cs_l |
bbd9b64e CO |
3802 | ? X86EMUL_MODE_PROT64 : cs_db |
3803 | ? X86EMUL_MODE_PROT32 : X86EMUL_MODE_PROT16; | |
3804 | ||
ad312c7c | 3805 | r = x86_decode_insn(&vcpu->arch.emulate_ctxt, &emulate_ops); |
e46479f8 | 3806 | trace_kvm_emulate_insn_start(vcpu); |
571008da | 3807 | |
0cb5762e AP |
3808 | /* Only allow emulation of specific instructions on #UD |
3809 | * (namely VMMCALL, sysenter, sysexit, syscall)*/ | |
571008da | 3810 | c = &vcpu->arch.emulate_ctxt.decode; |
0cb5762e AP |
3811 | if (emulation_type & EMULTYPE_TRAP_UD) { |
3812 | if (!c->twobyte) | |
3813 | return EMULATE_FAIL; | |
3814 | switch (c->b) { | |
3815 | case 0x01: /* VMMCALL */ | |
3816 | if (c->modrm_mod != 3 || c->modrm_rm != 1) | |
3817 | return EMULATE_FAIL; | |
3818 | break; | |
3819 | case 0x34: /* sysenter */ | |
3820 | case 0x35: /* sysexit */ | |
3821 | if (c->modrm_mod != 0 || c->modrm_rm != 0) | |
3822 | return EMULATE_FAIL; | |
3823 | break; | |
3824 | case 0x05: /* syscall */ | |
3825 | if (c->modrm_mod != 0 || c->modrm_rm != 0) | |
3826 | return EMULATE_FAIL; | |
3827 | break; | |
3828 | default: | |
3829 | return EMULATE_FAIL; | |
3830 | } | |
3831 | ||
3832 | if (!(c->modrm_reg == 0 || c->modrm_reg == 3)) | |
3833 | return EMULATE_FAIL; | |
3834 | } | |
571008da | 3835 | |
f2b5756b | 3836 | ++vcpu->stat.insn_emulation; |
bbd9b64e | 3837 | if (r) { |
f2b5756b | 3838 | ++vcpu->stat.insn_emulation_fail; |
e46479f8 | 3839 | trace_kvm_emulate_insn_failed(vcpu); |
bbd9b64e CO |
3840 | if (kvm_mmu_unprotect_page_virt(vcpu, cr2)) |
3841 | return EMULATE_DONE; | |
3842 | return EMULATE_FAIL; | |
3843 | } | |
3844 | } | |
3845 | ||
ba8afb6b GN |
3846 | if (emulation_type & EMULTYPE_SKIP) { |
3847 | kvm_rip_write(vcpu, vcpu->arch.emulate_ctxt.decode.eip); | |
3848 | return EMULATE_DONE; | |
3849 | } | |
3850 | ||
5cd21917 | 3851 | restart: |
ad312c7c | 3852 | r = x86_emulate_insn(&vcpu->arch.emulate_ctxt, &emulate_ops); |
310b5d30 GC |
3853 | shadow_mask = vcpu->arch.emulate_ctxt.interruptibility; |
3854 | ||
3855 | if (r == 0) | |
3856 | kvm_x86_ops->set_interrupt_shadow(vcpu, shadow_mask); | |
bbd9b64e | 3857 | |
7972995b | 3858 | if (vcpu->arch.pio.count) { |
cf8f70bf | 3859 | if (!vcpu->arch.pio.in) |
7972995b | 3860 | vcpu->arch.pio.count = 0; |
cf8f70bf GN |
3861 | return EMULATE_DO_MMIO; |
3862 | } | |
3863 | ||
112592da | 3864 | if (r || vcpu->mmio_is_write) { |
bbd9b64e CO |
3865 | run->exit_reason = KVM_EXIT_MMIO; |
3866 | run->mmio.phys_addr = vcpu->mmio_phys_addr; | |
3867 | memcpy(run->mmio.data, vcpu->mmio_data, 8); | |
3868 | run->mmio.len = vcpu->mmio_size; | |
3869 | run->mmio.is_write = vcpu->mmio_is_write; | |
3870 | } | |
3871 | ||
3872 | if (r) { | |
3873 | if (kvm_mmu_unprotect_page_virt(vcpu, cr2)) | |
5cd21917 | 3874 | goto done; |
bbd9b64e | 3875 | if (!vcpu->mmio_needed) { |
e46479f8 AK |
3876 | ++vcpu->stat.insn_emulation_fail; |
3877 | trace_kvm_emulate_insn_failed(vcpu); | |
bbd9b64e CO |
3878 | kvm_report_emulation_failure(vcpu, "mmio"); |
3879 | return EMULATE_FAIL; | |
3880 | } | |
3881 | return EMULATE_DO_MMIO; | |
3882 | } | |
3883 | ||
bbd9b64e CO |
3884 | if (vcpu->mmio_is_write) { |
3885 | vcpu->mmio_needed = 0; | |
3886 | return EMULATE_DO_MMIO; | |
3887 | } | |
3888 | ||
5cd21917 GN |
3889 | done: |
3890 | if (vcpu->arch.exception.pending) | |
3891 | vcpu->arch.emulate_ctxt.restart = false; | |
3892 | ||
3893 | if (vcpu->arch.emulate_ctxt.restart) | |
3894 | goto restart; | |
3895 | ||
bbd9b64e CO |
3896 | return EMULATE_DONE; |
3897 | } | |
3898 | EXPORT_SYMBOL_GPL(emulate_instruction); | |
3899 | ||
cf8f70bf GN |
3900 | int kvm_fast_pio_out(struct kvm_vcpu *vcpu, int size, unsigned short port) |
3901 | { | |
3902 | unsigned long val = kvm_register_read(vcpu, VCPU_REGS_RAX); | |
3903 | int ret = emulator_pio_out_emulated(size, port, &val, 1, vcpu); | |
3904 | /* do not return to emulator after return from userspace */ | |
7972995b | 3905 | vcpu->arch.pio.count = 0; |
cf8f70bf GN |
3906 | return ret; |
3907 | } | |
3908 | EXPORT_SYMBOL_GPL(kvm_fast_pio_out); | |
3909 | ||
c8076604 GH |
3910 | static void bounce_off(void *info) |
3911 | { | |
3912 | /* nothing */ | |
3913 | } | |
3914 | ||
c8076604 GH |
3915 | static int kvmclock_cpufreq_notifier(struct notifier_block *nb, unsigned long val, |
3916 | void *data) | |
3917 | { | |
3918 | struct cpufreq_freqs *freq = data; | |
3919 | struct kvm *kvm; | |
3920 | struct kvm_vcpu *vcpu; | |
3921 | int i, send_ipi = 0; | |
3922 | ||
c8076604 GH |
3923 | if (val == CPUFREQ_PRECHANGE && freq->old > freq->new) |
3924 | return 0; | |
3925 | if (val == CPUFREQ_POSTCHANGE && freq->old < freq->new) | |
3926 | return 0; | |
0cca7907 | 3927 | per_cpu(cpu_tsc_khz, freq->cpu) = freq->new; |
c8076604 GH |
3928 | |
3929 | spin_lock(&kvm_lock); | |
3930 | list_for_each_entry(kvm, &vm_list, vm_list) { | |
988a2cae | 3931 | kvm_for_each_vcpu(i, vcpu, kvm) { |
c8076604 GH |
3932 | if (vcpu->cpu != freq->cpu) |
3933 | continue; | |
3934 | if (!kvm_request_guest_time_update(vcpu)) | |
3935 | continue; | |
3936 | if (vcpu->cpu != smp_processor_id()) | |
3937 | send_ipi++; | |
3938 | } | |
3939 | } | |
3940 | spin_unlock(&kvm_lock); | |
3941 | ||
3942 | if (freq->old < freq->new && send_ipi) { | |
3943 | /* | |
3944 | * We upscale the frequency. Must make the guest | |
3945 | * doesn't see old kvmclock values while running with | |
3946 | * the new frequency, otherwise we risk the guest sees | |
3947 | * time go backwards. | |
3948 | * | |
3949 | * In case we update the frequency for another cpu | |
3950 | * (which might be in guest context) send an interrupt | |
3951 | * to kick the cpu out of guest context. Next time | |
3952 | * guest context is entered kvmclock will be updated, | |
3953 | * so the guest will not see stale values. | |
3954 | */ | |
3955 | smp_call_function_single(freq->cpu, bounce_off, NULL, 1); | |
3956 | } | |
3957 | return 0; | |
3958 | } | |
3959 | ||
3960 | static struct notifier_block kvmclock_cpufreq_notifier_block = { | |
3961 | .notifier_call = kvmclock_cpufreq_notifier | |
3962 | }; | |
3963 | ||
b820cc0c ZA |
3964 | static void kvm_timer_init(void) |
3965 | { | |
3966 | int cpu; | |
3967 | ||
b820cc0c | 3968 | if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) { |
b820cc0c ZA |
3969 | cpufreq_register_notifier(&kvmclock_cpufreq_notifier_block, |
3970 | CPUFREQ_TRANSITION_NOTIFIER); | |
6b7d7e76 ZA |
3971 | for_each_online_cpu(cpu) { |
3972 | unsigned long khz = cpufreq_get(cpu); | |
3973 | if (!khz) | |
3974 | khz = tsc_khz; | |
3975 | per_cpu(cpu_tsc_khz, cpu) = khz; | |
3976 | } | |
0cca7907 ZA |
3977 | } else { |
3978 | for_each_possible_cpu(cpu) | |
3979 | per_cpu(cpu_tsc_khz, cpu) = tsc_khz; | |
b820cc0c ZA |
3980 | } |
3981 | } | |
3982 | ||
ff9d07a0 ZY |
3983 | static DEFINE_PER_CPU(struct kvm_vcpu *, current_vcpu); |
3984 | ||
3985 | static int kvm_is_in_guest(void) | |
3986 | { | |
3987 | return percpu_read(current_vcpu) != NULL; | |
3988 | } | |
3989 | ||
3990 | static int kvm_is_user_mode(void) | |
3991 | { | |
3992 | int user_mode = 3; | |
dcf46b94 | 3993 | |
ff9d07a0 ZY |
3994 | if (percpu_read(current_vcpu)) |
3995 | user_mode = kvm_x86_ops->get_cpl(percpu_read(current_vcpu)); | |
dcf46b94 | 3996 | |
ff9d07a0 ZY |
3997 | return user_mode != 0; |
3998 | } | |
3999 | ||
4000 | static unsigned long kvm_get_guest_ip(void) | |
4001 | { | |
4002 | unsigned long ip = 0; | |
dcf46b94 | 4003 | |
ff9d07a0 ZY |
4004 | if (percpu_read(current_vcpu)) |
4005 | ip = kvm_rip_read(percpu_read(current_vcpu)); | |
dcf46b94 | 4006 | |
ff9d07a0 ZY |
4007 | return ip; |
4008 | } | |
4009 | ||
4010 | static struct perf_guest_info_callbacks kvm_guest_cbs = { | |
4011 | .is_in_guest = kvm_is_in_guest, | |
4012 | .is_user_mode = kvm_is_user_mode, | |
4013 | .get_guest_ip = kvm_get_guest_ip, | |
4014 | }; | |
4015 | ||
4016 | void kvm_before_handle_nmi(struct kvm_vcpu *vcpu) | |
4017 | { | |
4018 | percpu_write(current_vcpu, vcpu); | |
4019 | } | |
4020 | EXPORT_SYMBOL_GPL(kvm_before_handle_nmi); | |
4021 | ||
4022 | void kvm_after_handle_nmi(struct kvm_vcpu *vcpu) | |
4023 | { | |
4024 | percpu_write(current_vcpu, NULL); | |
4025 | } | |
4026 | EXPORT_SYMBOL_GPL(kvm_after_handle_nmi); | |
4027 | ||
f8c16bba | 4028 | int kvm_arch_init(void *opaque) |
043405e1 | 4029 | { |
b820cc0c | 4030 | int r; |
f8c16bba ZX |
4031 | struct kvm_x86_ops *ops = (struct kvm_x86_ops *)opaque; |
4032 | ||
f8c16bba ZX |
4033 | if (kvm_x86_ops) { |
4034 | printk(KERN_ERR "kvm: already loaded the other module\n"); | |
56c6d28a ZX |
4035 | r = -EEXIST; |
4036 | goto out; | |
f8c16bba ZX |
4037 | } |
4038 | ||
4039 | if (!ops->cpu_has_kvm_support()) { | |
4040 | printk(KERN_ERR "kvm: no hardware support\n"); | |
56c6d28a ZX |
4041 | r = -EOPNOTSUPP; |
4042 | goto out; | |
f8c16bba ZX |
4043 | } |
4044 | if (ops->disabled_by_bios()) { | |
4045 | printk(KERN_ERR "kvm: disabled by bios\n"); | |
56c6d28a ZX |
4046 | r = -EOPNOTSUPP; |
4047 | goto out; | |
f8c16bba ZX |
4048 | } |
4049 | ||
97db56ce AK |
4050 | r = kvm_mmu_module_init(); |
4051 | if (r) | |
4052 | goto out; | |
4053 | ||
4054 | kvm_init_msr_list(); | |
4055 | ||
f8c16bba | 4056 | kvm_x86_ops = ops; |
56c6d28a | 4057 | kvm_mmu_set_nonpresent_ptes(0ull, 0ull); |
7b52345e SY |
4058 | kvm_mmu_set_base_ptes(PT_PRESENT_MASK); |
4059 | kvm_mmu_set_mask_ptes(PT_USER_MASK, PT_ACCESSED_MASK, | |
4b12f0de | 4060 | PT_DIRTY_MASK, PT64_NX_MASK, 0); |
c8076604 | 4061 | |
b820cc0c | 4062 | kvm_timer_init(); |
c8076604 | 4063 | |
ff9d07a0 ZY |
4064 | perf_register_guest_info_callbacks(&kvm_guest_cbs); |
4065 | ||
f8c16bba | 4066 | return 0; |
56c6d28a ZX |
4067 | |
4068 | out: | |
56c6d28a | 4069 | return r; |
043405e1 | 4070 | } |
8776e519 | 4071 | |
f8c16bba ZX |
4072 | void kvm_arch_exit(void) |
4073 | { | |
ff9d07a0 ZY |
4074 | perf_unregister_guest_info_callbacks(&kvm_guest_cbs); |
4075 | ||
888d256e JK |
4076 | if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) |
4077 | cpufreq_unregister_notifier(&kvmclock_cpufreq_notifier_block, | |
4078 | CPUFREQ_TRANSITION_NOTIFIER); | |
f8c16bba | 4079 | kvm_x86_ops = NULL; |
56c6d28a ZX |
4080 | kvm_mmu_module_exit(); |
4081 | } | |
f8c16bba | 4082 | |
8776e519 HB |
4083 | int kvm_emulate_halt(struct kvm_vcpu *vcpu) |
4084 | { | |
4085 | ++vcpu->stat.halt_exits; | |
4086 | if (irqchip_in_kernel(vcpu->kvm)) { | |
a4535290 | 4087 | vcpu->arch.mp_state = KVM_MP_STATE_HALTED; |
8776e519 HB |
4088 | return 1; |
4089 | } else { | |
4090 | vcpu->run->exit_reason = KVM_EXIT_HLT; | |
4091 | return 0; | |
4092 | } | |
4093 | } | |
4094 | EXPORT_SYMBOL_GPL(kvm_emulate_halt); | |
4095 | ||
2f333bcb MT |
4096 | static inline gpa_t hc_gpa(struct kvm_vcpu *vcpu, unsigned long a0, |
4097 | unsigned long a1) | |
4098 | { | |
4099 | if (is_long_mode(vcpu)) | |
4100 | return a0; | |
4101 | else | |
4102 | return a0 | ((gpa_t)a1 << 32); | |
4103 | } | |
4104 | ||
55cd8e5a GN |
4105 | int kvm_hv_hypercall(struct kvm_vcpu *vcpu) |
4106 | { | |
4107 | u64 param, ingpa, outgpa, ret; | |
4108 | uint16_t code, rep_idx, rep_cnt, res = HV_STATUS_SUCCESS, rep_done = 0; | |
4109 | bool fast, longmode; | |
4110 | int cs_db, cs_l; | |
4111 | ||
4112 | /* | |
4113 | * hypercall generates UD from non zero cpl and real mode | |
4114 | * per HYPER-V spec | |
4115 | */ | |
3eeb3288 | 4116 | if (kvm_x86_ops->get_cpl(vcpu) != 0 || !is_protmode(vcpu)) { |
55cd8e5a GN |
4117 | kvm_queue_exception(vcpu, UD_VECTOR); |
4118 | return 0; | |
4119 | } | |
4120 | ||
4121 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); | |
4122 | longmode = is_long_mode(vcpu) && cs_l == 1; | |
4123 | ||
4124 | if (!longmode) { | |
ccd46936 GN |
4125 | param = ((u64)kvm_register_read(vcpu, VCPU_REGS_RDX) << 32) | |
4126 | (kvm_register_read(vcpu, VCPU_REGS_RAX) & 0xffffffff); | |
4127 | ingpa = ((u64)kvm_register_read(vcpu, VCPU_REGS_RBX) << 32) | | |
4128 | (kvm_register_read(vcpu, VCPU_REGS_RCX) & 0xffffffff); | |
4129 | outgpa = ((u64)kvm_register_read(vcpu, VCPU_REGS_RDI) << 32) | | |
4130 | (kvm_register_read(vcpu, VCPU_REGS_RSI) & 0xffffffff); | |
55cd8e5a GN |
4131 | } |
4132 | #ifdef CONFIG_X86_64 | |
4133 | else { | |
4134 | param = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
4135 | ingpa = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
4136 | outgpa = kvm_register_read(vcpu, VCPU_REGS_R8); | |
4137 | } | |
4138 | #endif | |
4139 | ||
4140 | code = param & 0xffff; | |
4141 | fast = (param >> 16) & 0x1; | |
4142 | rep_cnt = (param >> 32) & 0xfff; | |
4143 | rep_idx = (param >> 48) & 0xfff; | |
4144 | ||
4145 | trace_kvm_hv_hypercall(code, fast, rep_cnt, rep_idx, ingpa, outgpa); | |
4146 | ||
c25bc163 GN |
4147 | switch (code) { |
4148 | case HV_X64_HV_NOTIFY_LONG_SPIN_WAIT: | |
4149 | kvm_vcpu_on_spin(vcpu); | |
4150 | break; | |
4151 | default: | |
4152 | res = HV_STATUS_INVALID_HYPERCALL_CODE; | |
4153 | break; | |
4154 | } | |
55cd8e5a GN |
4155 | |
4156 | ret = res | (((u64)rep_done & 0xfff) << 32); | |
4157 | if (longmode) { | |
4158 | kvm_register_write(vcpu, VCPU_REGS_RAX, ret); | |
4159 | } else { | |
4160 | kvm_register_write(vcpu, VCPU_REGS_RDX, ret >> 32); | |
4161 | kvm_register_write(vcpu, VCPU_REGS_RAX, ret & 0xffffffff); | |
4162 | } | |
4163 | ||
4164 | return 1; | |
4165 | } | |
4166 | ||
8776e519 HB |
4167 | int kvm_emulate_hypercall(struct kvm_vcpu *vcpu) |
4168 | { | |
4169 | unsigned long nr, a0, a1, a2, a3, ret; | |
2f333bcb | 4170 | int r = 1; |
8776e519 | 4171 | |
55cd8e5a GN |
4172 | if (kvm_hv_hypercall_enabled(vcpu->kvm)) |
4173 | return kvm_hv_hypercall(vcpu); | |
4174 | ||
5fdbf976 MT |
4175 | nr = kvm_register_read(vcpu, VCPU_REGS_RAX); |
4176 | a0 = kvm_register_read(vcpu, VCPU_REGS_RBX); | |
4177 | a1 = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
4178 | a2 = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
4179 | a3 = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
8776e519 | 4180 | |
229456fc | 4181 | trace_kvm_hypercall(nr, a0, a1, a2, a3); |
2714d1d3 | 4182 | |
8776e519 HB |
4183 | if (!is_long_mode(vcpu)) { |
4184 | nr &= 0xFFFFFFFF; | |
4185 | a0 &= 0xFFFFFFFF; | |
4186 | a1 &= 0xFFFFFFFF; | |
4187 | a2 &= 0xFFFFFFFF; | |
4188 | a3 &= 0xFFFFFFFF; | |
4189 | } | |
4190 | ||
07708c4a JK |
4191 | if (kvm_x86_ops->get_cpl(vcpu) != 0) { |
4192 | ret = -KVM_EPERM; | |
4193 | goto out; | |
4194 | } | |
4195 | ||
8776e519 | 4196 | switch (nr) { |
b93463aa AK |
4197 | case KVM_HC_VAPIC_POLL_IRQ: |
4198 | ret = 0; | |
4199 | break; | |
2f333bcb MT |
4200 | case KVM_HC_MMU_OP: |
4201 | r = kvm_pv_mmu_op(vcpu, a0, hc_gpa(vcpu, a1, a2), &ret); | |
4202 | break; | |
8776e519 HB |
4203 | default: |
4204 | ret = -KVM_ENOSYS; | |
4205 | break; | |
4206 | } | |
07708c4a | 4207 | out: |
5fdbf976 | 4208 | kvm_register_write(vcpu, VCPU_REGS_RAX, ret); |
f11c3a8d | 4209 | ++vcpu->stat.hypercalls; |
2f333bcb | 4210 | return r; |
8776e519 HB |
4211 | } |
4212 | EXPORT_SYMBOL_GPL(kvm_emulate_hypercall); | |
4213 | ||
4214 | int kvm_fix_hypercall(struct kvm_vcpu *vcpu) | |
4215 | { | |
4216 | char instruction[3]; | |
5fdbf976 | 4217 | unsigned long rip = kvm_rip_read(vcpu); |
8776e519 | 4218 | |
8776e519 HB |
4219 | /* |
4220 | * Blow out the MMU to ensure that no other VCPU has an active mapping | |
4221 | * to ensure that the updated hypercall appears atomically across all | |
4222 | * VCPUs. | |
4223 | */ | |
4224 | kvm_mmu_zap_all(vcpu->kvm); | |
4225 | ||
8776e519 | 4226 | kvm_x86_ops->patch_hypercall(vcpu, instruction); |
8776e519 | 4227 | |
8f6abd06 | 4228 | return emulator_write_emulated(rip, instruction, 3, vcpu); |
8776e519 HB |
4229 | } |
4230 | ||
8776e519 HB |
4231 | void realmode_lgdt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base) |
4232 | { | |
89a27f4d | 4233 | struct desc_ptr dt = { limit, base }; |
8776e519 HB |
4234 | |
4235 | kvm_x86_ops->set_gdt(vcpu, &dt); | |
4236 | } | |
4237 | ||
4238 | void realmode_lidt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base) | |
4239 | { | |
89a27f4d | 4240 | struct desc_ptr dt = { limit, base }; |
8776e519 HB |
4241 | |
4242 | kvm_x86_ops->set_idt(vcpu, &dt); | |
4243 | } | |
4244 | ||
07716717 DK |
4245 | static int move_to_next_stateful_cpuid_entry(struct kvm_vcpu *vcpu, int i) |
4246 | { | |
ad312c7c ZX |
4247 | struct kvm_cpuid_entry2 *e = &vcpu->arch.cpuid_entries[i]; |
4248 | int j, nent = vcpu->arch.cpuid_nent; | |
07716717 DK |
4249 | |
4250 | e->flags &= ~KVM_CPUID_FLAG_STATE_READ_NEXT; | |
4251 | /* when no next entry is found, the current entry[i] is reselected */ | |
0fdf8e59 | 4252 | for (j = i + 1; ; j = (j + 1) % nent) { |
ad312c7c | 4253 | struct kvm_cpuid_entry2 *ej = &vcpu->arch.cpuid_entries[j]; |
07716717 DK |
4254 | if (ej->function == e->function) { |
4255 | ej->flags |= KVM_CPUID_FLAG_STATE_READ_NEXT; | |
4256 | return j; | |
4257 | } | |
4258 | } | |
4259 | return 0; /* silence gcc, even though control never reaches here */ | |
4260 | } | |
4261 | ||
4262 | /* find an entry with matching function, matching index (if needed), and that | |
4263 | * should be read next (if it's stateful) */ | |
4264 | static int is_matching_cpuid_entry(struct kvm_cpuid_entry2 *e, | |
4265 | u32 function, u32 index) | |
4266 | { | |
4267 | if (e->function != function) | |
4268 | return 0; | |
4269 | if ((e->flags & KVM_CPUID_FLAG_SIGNIFCANT_INDEX) && e->index != index) | |
4270 | return 0; | |
4271 | if ((e->flags & KVM_CPUID_FLAG_STATEFUL_FUNC) && | |
19355475 | 4272 | !(e->flags & KVM_CPUID_FLAG_STATE_READ_NEXT)) |
07716717 DK |
4273 | return 0; |
4274 | return 1; | |
4275 | } | |
4276 | ||
d8017474 AG |
4277 | struct kvm_cpuid_entry2 *kvm_find_cpuid_entry(struct kvm_vcpu *vcpu, |
4278 | u32 function, u32 index) | |
8776e519 HB |
4279 | { |
4280 | int i; | |
d8017474 | 4281 | struct kvm_cpuid_entry2 *best = NULL; |
8776e519 | 4282 | |
ad312c7c | 4283 | for (i = 0; i < vcpu->arch.cpuid_nent; ++i) { |
d8017474 AG |
4284 | struct kvm_cpuid_entry2 *e; |
4285 | ||
ad312c7c | 4286 | e = &vcpu->arch.cpuid_entries[i]; |
07716717 DK |
4287 | if (is_matching_cpuid_entry(e, function, index)) { |
4288 | if (e->flags & KVM_CPUID_FLAG_STATEFUL_FUNC) | |
4289 | move_to_next_stateful_cpuid_entry(vcpu, i); | |
8776e519 HB |
4290 | best = e; |
4291 | break; | |
4292 | } | |
4293 | /* | |
4294 | * Both basic or both extended? | |
4295 | */ | |
4296 | if (((e->function ^ function) & 0x80000000) == 0) | |
4297 | if (!best || e->function > best->function) | |
4298 | best = e; | |
4299 | } | |
d8017474 AG |
4300 | return best; |
4301 | } | |
0e851880 | 4302 | EXPORT_SYMBOL_GPL(kvm_find_cpuid_entry); |
d8017474 | 4303 | |
82725b20 DE |
4304 | int cpuid_maxphyaddr(struct kvm_vcpu *vcpu) |
4305 | { | |
4306 | struct kvm_cpuid_entry2 *best; | |
4307 | ||
f7a71197 AK |
4308 | best = kvm_find_cpuid_entry(vcpu, 0x80000000, 0); |
4309 | if (!best || best->eax < 0x80000008) | |
4310 | goto not_found; | |
82725b20 DE |
4311 | best = kvm_find_cpuid_entry(vcpu, 0x80000008, 0); |
4312 | if (best) | |
4313 | return best->eax & 0xff; | |
f7a71197 | 4314 | not_found: |
82725b20 DE |
4315 | return 36; |
4316 | } | |
4317 | ||
d8017474 AG |
4318 | void kvm_emulate_cpuid(struct kvm_vcpu *vcpu) |
4319 | { | |
4320 | u32 function, index; | |
4321 | struct kvm_cpuid_entry2 *best; | |
4322 | ||
4323 | function = kvm_register_read(vcpu, VCPU_REGS_RAX); | |
4324 | index = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
4325 | kvm_register_write(vcpu, VCPU_REGS_RAX, 0); | |
4326 | kvm_register_write(vcpu, VCPU_REGS_RBX, 0); | |
4327 | kvm_register_write(vcpu, VCPU_REGS_RCX, 0); | |
4328 | kvm_register_write(vcpu, VCPU_REGS_RDX, 0); | |
4329 | best = kvm_find_cpuid_entry(vcpu, function, index); | |
8776e519 | 4330 | if (best) { |
5fdbf976 MT |
4331 | kvm_register_write(vcpu, VCPU_REGS_RAX, best->eax); |
4332 | kvm_register_write(vcpu, VCPU_REGS_RBX, best->ebx); | |
4333 | kvm_register_write(vcpu, VCPU_REGS_RCX, best->ecx); | |
4334 | kvm_register_write(vcpu, VCPU_REGS_RDX, best->edx); | |
8776e519 | 4335 | } |
8776e519 | 4336 | kvm_x86_ops->skip_emulated_instruction(vcpu); |
229456fc MT |
4337 | trace_kvm_cpuid(function, |
4338 | kvm_register_read(vcpu, VCPU_REGS_RAX), | |
4339 | kvm_register_read(vcpu, VCPU_REGS_RBX), | |
4340 | kvm_register_read(vcpu, VCPU_REGS_RCX), | |
4341 | kvm_register_read(vcpu, VCPU_REGS_RDX)); | |
8776e519 HB |
4342 | } |
4343 | EXPORT_SYMBOL_GPL(kvm_emulate_cpuid); | |
d0752060 | 4344 | |
b6c7a5dc HB |
4345 | /* |
4346 | * Check if userspace requested an interrupt window, and that the | |
4347 | * interrupt window is open. | |
4348 | * | |
4349 | * No need to exit to userspace if we already have an interrupt queued. | |
4350 | */ | |
851ba692 | 4351 | static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu) |
b6c7a5dc | 4352 | { |
8061823a | 4353 | return (!irqchip_in_kernel(vcpu->kvm) && !kvm_cpu_has_interrupt(vcpu) && |
851ba692 | 4354 | vcpu->run->request_interrupt_window && |
5df56646 | 4355 | kvm_arch_interrupt_allowed(vcpu)); |
b6c7a5dc HB |
4356 | } |
4357 | ||
851ba692 | 4358 | static void post_kvm_run_save(struct kvm_vcpu *vcpu) |
b6c7a5dc | 4359 | { |
851ba692 AK |
4360 | struct kvm_run *kvm_run = vcpu->run; |
4361 | ||
91586a3b | 4362 | kvm_run->if_flag = (kvm_get_rflags(vcpu) & X86_EFLAGS_IF) != 0; |
2d3ad1f4 | 4363 | kvm_run->cr8 = kvm_get_cr8(vcpu); |
b6c7a5dc | 4364 | kvm_run->apic_base = kvm_get_apic_base(vcpu); |
4531220b | 4365 | if (irqchip_in_kernel(vcpu->kvm)) |
b6c7a5dc | 4366 | kvm_run->ready_for_interrupt_injection = 1; |
4531220b | 4367 | else |
b6c7a5dc | 4368 | kvm_run->ready_for_interrupt_injection = |
fa9726b0 GN |
4369 | kvm_arch_interrupt_allowed(vcpu) && |
4370 | !kvm_cpu_has_interrupt(vcpu) && | |
4371 | !kvm_event_needs_reinjection(vcpu); | |
b6c7a5dc HB |
4372 | } |
4373 | ||
b93463aa AK |
4374 | static void vapic_enter(struct kvm_vcpu *vcpu) |
4375 | { | |
4376 | struct kvm_lapic *apic = vcpu->arch.apic; | |
4377 | struct page *page; | |
4378 | ||
4379 | if (!apic || !apic->vapic_addr) | |
4380 | return; | |
4381 | ||
4382 | page = gfn_to_page(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT); | |
72dc67a6 IE |
4383 | |
4384 | vcpu->arch.apic->vapic_page = page; | |
b93463aa AK |
4385 | } |
4386 | ||
4387 | static void vapic_exit(struct kvm_vcpu *vcpu) | |
4388 | { | |
4389 | struct kvm_lapic *apic = vcpu->arch.apic; | |
f656ce01 | 4390 | int idx; |
b93463aa AK |
4391 | |
4392 | if (!apic || !apic->vapic_addr) | |
4393 | return; | |
4394 | ||
f656ce01 | 4395 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
b93463aa AK |
4396 | kvm_release_page_dirty(apic->vapic_page); |
4397 | mark_page_dirty(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT); | |
f656ce01 | 4398 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
b93463aa AK |
4399 | } |
4400 | ||
95ba8273 GN |
4401 | static void update_cr8_intercept(struct kvm_vcpu *vcpu) |
4402 | { | |
4403 | int max_irr, tpr; | |
4404 | ||
4405 | if (!kvm_x86_ops->update_cr8_intercept) | |
4406 | return; | |
4407 | ||
88c808fd AK |
4408 | if (!vcpu->arch.apic) |
4409 | return; | |
4410 | ||
8db3baa2 GN |
4411 | if (!vcpu->arch.apic->vapic_addr) |
4412 | max_irr = kvm_lapic_find_highest_irr(vcpu); | |
4413 | else | |
4414 | max_irr = -1; | |
95ba8273 GN |
4415 | |
4416 | if (max_irr != -1) | |
4417 | max_irr >>= 4; | |
4418 | ||
4419 | tpr = kvm_lapic_get_cr8(vcpu); | |
4420 | ||
4421 | kvm_x86_ops->update_cr8_intercept(vcpu, tpr, max_irr); | |
4422 | } | |
4423 | ||
851ba692 | 4424 | static void inject_pending_event(struct kvm_vcpu *vcpu) |
95ba8273 GN |
4425 | { |
4426 | /* try to reinject previous events if any */ | |
b59bb7bd | 4427 | if (vcpu->arch.exception.pending) { |
5c1c85d0 AK |
4428 | trace_kvm_inj_exception(vcpu->arch.exception.nr, |
4429 | vcpu->arch.exception.has_error_code, | |
4430 | vcpu->arch.exception.error_code); | |
b59bb7bd GN |
4431 | kvm_x86_ops->queue_exception(vcpu, vcpu->arch.exception.nr, |
4432 | vcpu->arch.exception.has_error_code, | |
ce7ddec4 JR |
4433 | vcpu->arch.exception.error_code, |
4434 | vcpu->arch.exception.reinject); | |
b59bb7bd GN |
4435 | return; |
4436 | } | |
4437 | ||
95ba8273 GN |
4438 | if (vcpu->arch.nmi_injected) { |
4439 | kvm_x86_ops->set_nmi(vcpu); | |
4440 | return; | |
4441 | } | |
4442 | ||
4443 | if (vcpu->arch.interrupt.pending) { | |
66fd3f7f | 4444 | kvm_x86_ops->set_irq(vcpu); |
95ba8273 GN |
4445 | return; |
4446 | } | |
4447 | ||
4448 | /* try to inject new event if pending */ | |
4449 | if (vcpu->arch.nmi_pending) { | |
4450 | if (kvm_x86_ops->nmi_allowed(vcpu)) { | |
4451 | vcpu->arch.nmi_pending = false; | |
4452 | vcpu->arch.nmi_injected = true; | |
4453 | kvm_x86_ops->set_nmi(vcpu); | |
4454 | } | |
4455 | } else if (kvm_cpu_has_interrupt(vcpu)) { | |
4456 | if (kvm_x86_ops->interrupt_allowed(vcpu)) { | |
66fd3f7f GN |
4457 | kvm_queue_interrupt(vcpu, kvm_cpu_get_interrupt(vcpu), |
4458 | false); | |
4459 | kvm_x86_ops->set_irq(vcpu); | |
95ba8273 GN |
4460 | } |
4461 | } | |
4462 | } | |
4463 | ||
851ba692 | 4464 | static int vcpu_enter_guest(struct kvm_vcpu *vcpu) |
b6c7a5dc HB |
4465 | { |
4466 | int r; | |
6a8b1d13 | 4467 | bool req_int_win = !irqchip_in_kernel(vcpu->kvm) && |
851ba692 | 4468 | vcpu->run->request_interrupt_window; |
b6c7a5dc | 4469 | |
2e53d63a MT |
4470 | if (vcpu->requests) |
4471 | if (test_and_clear_bit(KVM_REQ_MMU_RELOAD, &vcpu->requests)) | |
4472 | kvm_mmu_unload(vcpu); | |
4473 | ||
b6c7a5dc HB |
4474 | r = kvm_mmu_reload(vcpu); |
4475 | if (unlikely(r)) | |
4476 | goto out; | |
4477 | ||
2f52d58c AK |
4478 | if (vcpu->requests) { |
4479 | if (test_and_clear_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests)) | |
2f599714 | 4480 | __kvm_migrate_timers(vcpu); |
c8076604 GH |
4481 | if (test_and_clear_bit(KVM_REQ_KVMCLOCK_UPDATE, &vcpu->requests)) |
4482 | kvm_write_guest_time(vcpu); | |
4731d4c7 MT |
4483 | if (test_and_clear_bit(KVM_REQ_MMU_SYNC, &vcpu->requests)) |
4484 | kvm_mmu_sync_roots(vcpu); | |
d4acf7e7 MT |
4485 | if (test_and_clear_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests)) |
4486 | kvm_x86_ops->tlb_flush(vcpu); | |
b93463aa AK |
4487 | if (test_and_clear_bit(KVM_REQ_REPORT_TPR_ACCESS, |
4488 | &vcpu->requests)) { | |
851ba692 | 4489 | vcpu->run->exit_reason = KVM_EXIT_TPR_ACCESS; |
b93463aa AK |
4490 | r = 0; |
4491 | goto out; | |
4492 | } | |
71c4dfaf | 4493 | if (test_and_clear_bit(KVM_REQ_TRIPLE_FAULT, &vcpu->requests)) { |
851ba692 | 4494 | vcpu->run->exit_reason = KVM_EXIT_SHUTDOWN; |
71c4dfaf JR |
4495 | r = 0; |
4496 | goto out; | |
4497 | } | |
02daab21 AK |
4498 | if (test_and_clear_bit(KVM_REQ_DEACTIVATE_FPU, &vcpu->requests)) { |
4499 | vcpu->fpu_active = 0; | |
4500 | kvm_x86_ops->fpu_deactivate(vcpu); | |
4501 | } | |
2f52d58c | 4502 | } |
b93463aa | 4503 | |
b6c7a5dc HB |
4504 | preempt_disable(); |
4505 | ||
4506 | kvm_x86_ops->prepare_guest_switch(vcpu); | |
2608d7a1 AK |
4507 | if (vcpu->fpu_active) |
4508 | kvm_load_guest_fpu(vcpu); | |
b6c7a5dc HB |
4509 | |
4510 | local_irq_disable(); | |
4511 | ||
32f88400 MT |
4512 | clear_bit(KVM_REQ_KICK, &vcpu->requests); |
4513 | smp_mb__after_clear_bit(); | |
4514 | ||
d7690175 | 4515 | if (vcpu->requests || need_resched() || signal_pending(current)) { |
c7f0f24b | 4516 | set_bit(KVM_REQ_KICK, &vcpu->requests); |
6c142801 AK |
4517 | local_irq_enable(); |
4518 | preempt_enable(); | |
4519 | r = 1; | |
4520 | goto out; | |
4521 | } | |
4522 | ||
851ba692 | 4523 | inject_pending_event(vcpu); |
b6c7a5dc | 4524 | |
6a8b1d13 GN |
4525 | /* enable NMI/IRQ window open exits if needed */ |
4526 | if (vcpu->arch.nmi_pending) | |
4527 | kvm_x86_ops->enable_nmi_window(vcpu); | |
4528 | else if (kvm_cpu_has_interrupt(vcpu) || req_int_win) | |
4529 | kvm_x86_ops->enable_irq_window(vcpu); | |
4530 | ||
95ba8273 | 4531 | if (kvm_lapic_enabled(vcpu)) { |
8db3baa2 GN |
4532 | update_cr8_intercept(vcpu); |
4533 | kvm_lapic_sync_to_vapic(vcpu); | |
95ba8273 | 4534 | } |
b93463aa | 4535 | |
f656ce01 | 4536 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
3200f405 | 4537 | |
b6c7a5dc HB |
4538 | kvm_guest_enter(); |
4539 | ||
42dbaa5a | 4540 | if (unlikely(vcpu->arch.switch_db_regs)) { |
42dbaa5a JK |
4541 | set_debugreg(0, 7); |
4542 | set_debugreg(vcpu->arch.eff_db[0], 0); | |
4543 | set_debugreg(vcpu->arch.eff_db[1], 1); | |
4544 | set_debugreg(vcpu->arch.eff_db[2], 2); | |
4545 | set_debugreg(vcpu->arch.eff_db[3], 3); | |
4546 | } | |
b6c7a5dc | 4547 | |
229456fc | 4548 | trace_kvm_entry(vcpu->vcpu_id); |
851ba692 | 4549 | kvm_x86_ops->run(vcpu); |
b6c7a5dc | 4550 | |
24f1e32c FW |
4551 | /* |
4552 | * If the guest has used debug registers, at least dr7 | |
4553 | * will be disabled while returning to the host. | |
4554 | * If we don't have active breakpoints in the host, we don't | |
4555 | * care about the messed up debug address registers. But if | |
4556 | * we have some of them active, restore the old state. | |
4557 | */ | |
59d8eb53 | 4558 | if (hw_breakpoint_active()) |
24f1e32c | 4559 | hw_breakpoint_restore(); |
42dbaa5a | 4560 | |
32f88400 | 4561 | set_bit(KVM_REQ_KICK, &vcpu->requests); |
b6c7a5dc HB |
4562 | local_irq_enable(); |
4563 | ||
4564 | ++vcpu->stat.exits; | |
4565 | ||
4566 | /* | |
4567 | * We must have an instruction between local_irq_enable() and | |
4568 | * kvm_guest_exit(), so the timer interrupt isn't delayed by | |
4569 | * the interrupt shadow. The stat.exits increment will do nicely. | |
4570 | * But we need to prevent reordering, hence this barrier(): | |
4571 | */ | |
4572 | barrier(); | |
4573 | ||
4574 | kvm_guest_exit(); | |
4575 | ||
4576 | preempt_enable(); | |
4577 | ||
f656ce01 | 4578 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
3200f405 | 4579 | |
b6c7a5dc HB |
4580 | /* |
4581 | * Profile KVM exit RIPs: | |
4582 | */ | |
4583 | if (unlikely(prof_on == KVM_PROFILING)) { | |
5fdbf976 MT |
4584 | unsigned long rip = kvm_rip_read(vcpu); |
4585 | profile_hit(KVM_PROFILING, (void *)rip); | |
b6c7a5dc HB |
4586 | } |
4587 | ||
298101da | 4588 | |
b93463aa AK |
4589 | kvm_lapic_sync_from_vapic(vcpu); |
4590 | ||
851ba692 | 4591 | r = kvm_x86_ops->handle_exit(vcpu); |
d7690175 MT |
4592 | out: |
4593 | return r; | |
4594 | } | |
b6c7a5dc | 4595 | |
09cec754 | 4596 | |
851ba692 | 4597 | static int __vcpu_run(struct kvm_vcpu *vcpu) |
d7690175 MT |
4598 | { |
4599 | int r; | |
f656ce01 | 4600 | struct kvm *kvm = vcpu->kvm; |
d7690175 MT |
4601 | |
4602 | if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_SIPI_RECEIVED)) { | |
1b10bf31 JK |
4603 | pr_debug("vcpu %d received sipi with vector # %x\n", |
4604 | vcpu->vcpu_id, vcpu->arch.sipi_vector); | |
d7690175 | 4605 | kvm_lapic_reset(vcpu); |
5f179287 | 4606 | r = kvm_arch_vcpu_reset(vcpu); |
d7690175 MT |
4607 | if (r) |
4608 | return r; | |
4609 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; | |
b6c7a5dc HB |
4610 | } |
4611 | ||
f656ce01 | 4612 | vcpu->srcu_idx = srcu_read_lock(&kvm->srcu); |
d7690175 MT |
4613 | vapic_enter(vcpu); |
4614 | ||
4615 | r = 1; | |
4616 | while (r > 0) { | |
af2152f5 | 4617 | if (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE) |
851ba692 | 4618 | r = vcpu_enter_guest(vcpu); |
d7690175 | 4619 | else { |
f656ce01 | 4620 | srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx); |
d7690175 | 4621 | kvm_vcpu_block(vcpu); |
f656ce01 | 4622 | vcpu->srcu_idx = srcu_read_lock(&kvm->srcu); |
d7690175 | 4623 | if (test_and_clear_bit(KVM_REQ_UNHALT, &vcpu->requests)) |
09cec754 GN |
4624 | { |
4625 | switch(vcpu->arch.mp_state) { | |
4626 | case KVM_MP_STATE_HALTED: | |
d7690175 | 4627 | vcpu->arch.mp_state = |
09cec754 GN |
4628 | KVM_MP_STATE_RUNNABLE; |
4629 | case KVM_MP_STATE_RUNNABLE: | |
4630 | break; | |
4631 | case KVM_MP_STATE_SIPI_RECEIVED: | |
4632 | default: | |
4633 | r = -EINTR; | |
4634 | break; | |
4635 | } | |
4636 | } | |
d7690175 MT |
4637 | } |
4638 | ||
09cec754 GN |
4639 | if (r <= 0) |
4640 | break; | |
4641 | ||
4642 | clear_bit(KVM_REQ_PENDING_TIMER, &vcpu->requests); | |
4643 | if (kvm_cpu_has_pending_timer(vcpu)) | |
4644 | kvm_inject_pending_timer_irqs(vcpu); | |
4645 | ||
851ba692 | 4646 | if (dm_request_for_irq_injection(vcpu)) { |
09cec754 | 4647 | r = -EINTR; |
851ba692 | 4648 | vcpu->run->exit_reason = KVM_EXIT_INTR; |
09cec754 GN |
4649 | ++vcpu->stat.request_irq_exits; |
4650 | } | |
4651 | if (signal_pending(current)) { | |
4652 | r = -EINTR; | |
851ba692 | 4653 | vcpu->run->exit_reason = KVM_EXIT_INTR; |
09cec754 GN |
4654 | ++vcpu->stat.signal_exits; |
4655 | } | |
4656 | if (need_resched()) { | |
f656ce01 | 4657 | srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx); |
09cec754 | 4658 | kvm_resched(vcpu); |
f656ce01 | 4659 | vcpu->srcu_idx = srcu_read_lock(&kvm->srcu); |
d7690175 | 4660 | } |
b6c7a5dc HB |
4661 | } |
4662 | ||
f656ce01 | 4663 | srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx); |
b6c7a5dc | 4664 | |
b93463aa AK |
4665 | vapic_exit(vcpu); |
4666 | ||
b6c7a5dc HB |
4667 | return r; |
4668 | } | |
4669 | ||
4670 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
4671 | { | |
4672 | int r; | |
4673 | sigset_t sigsaved; | |
4674 | ||
4675 | vcpu_load(vcpu); | |
4676 | ||
ac9f6dc0 AK |
4677 | if (vcpu->sigset_active) |
4678 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
4679 | ||
a4535290 | 4680 | if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)) { |
b6c7a5dc | 4681 | kvm_vcpu_block(vcpu); |
d7690175 | 4682 | clear_bit(KVM_REQ_UNHALT, &vcpu->requests); |
ac9f6dc0 AK |
4683 | r = -EAGAIN; |
4684 | goto out; | |
b6c7a5dc HB |
4685 | } |
4686 | ||
b6c7a5dc HB |
4687 | /* re-sync apic's tpr */ |
4688 | if (!irqchip_in_kernel(vcpu->kvm)) | |
2d3ad1f4 | 4689 | kvm_set_cr8(vcpu, kvm_run->cr8); |
b6c7a5dc | 4690 | |
92bf9748 GN |
4691 | if (vcpu->arch.pio.count || vcpu->mmio_needed || |
4692 | vcpu->arch.emulate_ctxt.restart) { | |
4693 | if (vcpu->mmio_needed) { | |
4694 | memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8); | |
4695 | vcpu->mmio_read_completed = 1; | |
4696 | vcpu->mmio_needed = 0; | |
b6c7a5dc | 4697 | } |
5cd21917 GN |
4698 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
4699 | r = emulate_instruction(vcpu, 0, 0, EMULTYPE_NO_DECODE); | |
4700 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); | |
4701 | if (r == EMULATE_DO_MMIO) { | |
4702 | r = 0; | |
4703 | goto out; | |
4704 | } | |
4705 | } | |
5fdbf976 MT |
4706 | if (kvm_run->exit_reason == KVM_EXIT_HYPERCALL) |
4707 | kvm_register_write(vcpu, VCPU_REGS_RAX, | |
4708 | kvm_run->hypercall.ret); | |
b6c7a5dc | 4709 | |
851ba692 | 4710 | r = __vcpu_run(vcpu); |
b6c7a5dc HB |
4711 | |
4712 | out: | |
f1d86e46 | 4713 | post_kvm_run_save(vcpu); |
b6c7a5dc HB |
4714 | if (vcpu->sigset_active) |
4715 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
4716 | ||
4717 | vcpu_put(vcpu); | |
4718 | return r; | |
4719 | } | |
4720 | ||
4721 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
4722 | { | |
4723 | vcpu_load(vcpu); | |
4724 | ||
5fdbf976 MT |
4725 | regs->rax = kvm_register_read(vcpu, VCPU_REGS_RAX); |
4726 | regs->rbx = kvm_register_read(vcpu, VCPU_REGS_RBX); | |
4727 | regs->rcx = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
4728 | regs->rdx = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
4729 | regs->rsi = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
4730 | regs->rdi = kvm_register_read(vcpu, VCPU_REGS_RDI); | |
4731 | regs->rsp = kvm_register_read(vcpu, VCPU_REGS_RSP); | |
4732 | regs->rbp = kvm_register_read(vcpu, VCPU_REGS_RBP); | |
b6c7a5dc | 4733 | #ifdef CONFIG_X86_64 |
5fdbf976 MT |
4734 | regs->r8 = kvm_register_read(vcpu, VCPU_REGS_R8); |
4735 | regs->r9 = kvm_register_read(vcpu, VCPU_REGS_R9); | |
4736 | regs->r10 = kvm_register_read(vcpu, VCPU_REGS_R10); | |
4737 | regs->r11 = kvm_register_read(vcpu, VCPU_REGS_R11); | |
4738 | regs->r12 = kvm_register_read(vcpu, VCPU_REGS_R12); | |
4739 | regs->r13 = kvm_register_read(vcpu, VCPU_REGS_R13); | |
4740 | regs->r14 = kvm_register_read(vcpu, VCPU_REGS_R14); | |
4741 | regs->r15 = kvm_register_read(vcpu, VCPU_REGS_R15); | |
b6c7a5dc HB |
4742 | #endif |
4743 | ||
5fdbf976 | 4744 | regs->rip = kvm_rip_read(vcpu); |
91586a3b | 4745 | regs->rflags = kvm_get_rflags(vcpu); |
b6c7a5dc HB |
4746 | |
4747 | vcpu_put(vcpu); | |
4748 | ||
4749 | return 0; | |
4750 | } | |
4751 | ||
4752 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
4753 | { | |
4754 | vcpu_load(vcpu); | |
4755 | ||
5fdbf976 MT |
4756 | kvm_register_write(vcpu, VCPU_REGS_RAX, regs->rax); |
4757 | kvm_register_write(vcpu, VCPU_REGS_RBX, regs->rbx); | |
4758 | kvm_register_write(vcpu, VCPU_REGS_RCX, regs->rcx); | |
4759 | kvm_register_write(vcpu, VCPU_REGS_RDX, regs->rdx); | |
4760 | kvm_register_write(vcpu, VCPU_REGS_RSI, regs->rsi); | |
4761 | kvm_register_write(vcpu, VCPU_REGS_RDI, regs->rdi); | |
4762 | kvm_register_write(vcpu, VCPU_REGS_RSP, regs->rsp); | |
4763 | kvm_register_write(vcpu, VCPU_REGS_RBP, regs->rbp); | |
b6c7a5dc | 4764 | #ifdef CONFIG_X86_64 |
5fdbf976 MT |
4765 | kvm_register_write(vcpu, VCPU_REGS_R8, regs->r8); |
4766 | kvm_register_write(vcpu, VCPU_REGS_R9, regs->r9); | |
4767 | kvm_register_write(vcpu, VCPU_REGS_R10, regs->r10); | |
4768 | kvm_register_write(vcpu, VCPU_REGS_R11, regs->r11); | |
4769 | kvm_register_write(vcpu, VCPU_REGS_R12, regs->r12); | |
4770 | kvm_register_write(vcpu, VCPU_REGS_R13, regs->r13); | |
4771 | kvm_register_write(vcpu, VCPU_REGS_R14, regs->r14); | |
4772 | kvm_register_write(vcpu, VCPU_REGS_R15, regs->r15); | |
b6c7a5dc HB |
4773 | #endif |
4774 | ||
5fdbf976 | 4775 | kvm_rip_write(vcpu, regs->rip); |
91586a3b | 4776 | kvm_set_rflags(vcpu, regs->rflags); |
b6c7a5dc | 4777 | |
b4f14abd JK |
4778 | vcpu->arch.exception.pending = false; |
4779 | ||
b6c7a5dc HB |
4780 | vcpu_put(vcpu); |
4781 | ||
4782 | return 0; | |
4783 | } | |
4784 | ||
b6c7a5dc HB |
4785 | void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l) |
4786 | { | |
4787 | struct kvm_segment cs; | |
4788 | ||
3e6e0aab | 4789 | kvm_get_segment(vcpu, &cs, VCPU_SREG_CS); |
b6c7a5dc HB |
4790 | *db = cs.db; |
4791 | *l = cs.l; | |
4792 | } | |
4793 | EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits); | |
4794 | ||
4795 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, | |
4796 | struct kvm_sregs *sregs) | |
4797 | { | |
89a27f4d | 4798 | struct desc_ptr dt; |
b6c7a5dc HB |
4799 | |
4800 | vcpu_load(vcpu); | |
4801 | ||
3e6e0aab GT |
4802 | kvm_get_segment(vcpu, &sregs->cs, VCPU_SREG_CS); |
4803 | kvm_get_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
4804 | kvm_get_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
4805 | kvm_get_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
4806 | kvm_get_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
4807 | kvm_get_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
b6c7a5dc | 4808 | |
3e6e0aab GT |
4809 | kvm_get_segment(vcpu, &sregs->tr, VCPU_SREG_TR); |
4810 | kvm_get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
b6c7a5dc HB |
4811 | |
4812 | kvm_x86_ops->get_idt(vcpu, &dt); | |
89a27f4d GN |
4813 | sregs->idt.limit = dt.size; |
4814 | sregs->idt.base = dt.address; | |
b6c7a5dc | 4815 | kvm_x86_ops->get_gdt(vcpu, &dt); |
89a27f4d GN |
4816 | sregs->gdt.limit = dt.size; |
4817 | sregs->gdt.base = dt.address; | |
b6c7a5dc | 4818 | |
4d4ec087 | 4819 | sregs->cr0 = kvm_read_cr0(vcpu); |
ad312c7c ZX |
4820 | sregs->cr2 = vcpu->arch.cr2; |
4821 | sregs->cr3 = vcpu->arch.cr3; | |
fc78f519 | 4822 | sregs->cr4 = kvm_read_cr4(vcpu); |
2d3ad1f4 | 4823 | sregs->cr8 = kvm_get_cr8(vcpu); |
f6801dff | 4824 | sregs->efer = vcpu->arch.efer; |
b6c7a5dc HB |
4825 | sregs->apic_base = kvm_get_apic_base(vcpu); |
4826 | ||
923c61bb | 4827 | memset(sregs->interrupt_bitmap, 0, sizeof sregs->interrupt_bitmap); |
b6c7a5dc | 4828 | |
36752c9b | 4829 | if (vcpu->arch.interrupt.pending && !vcpu->arch.interrupt.soft) |
14d0bc1f GN |
4830 | set_bit(vcpu->arch.interrupt.nr, |
4831 | (unsigned long *)sregs->interrupt_bitmap); | |
16d7a191 | 4832 | |
b6c7a5dc HB |
4833 | vcpu_put(vcpu); |
4834 | ||
4835 | return 0; | |
4836 | } | |
4837 | ||
62d9f0db MT |
4838 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
4839 | struct kvm_mp_state *mp_state) | |
4840 | { | |
4841 | vcpu_load(vcpu); | |
4842 | mp_state->mp_state = vcpu->arch.mp_state; | |
4843 | vcpu_put(vcpu); | |
4844 | return 0; | |
4845 | } | |
4846 | ||
4847 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
4848 | struct kvm_mp_state *mp_state) | |
4849 | { | |
4850 | vcpu_load(vcpu); | |
4851 | vcpu->arch.mp_state = mp_state->mp_state; | |
4852 | vcpu_put(vcpu); | |
4853 | return 0; | |
4854 | } | |
4855 | ||
e269fb21 JK |
4856 | int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int reason, |
4857 | bool has_error_code, u32 error_code) | |
37817f29 | 4858 | { |
ceffb459 GN |
4859 | int cs_db, cs_l, ret; |
4860 | cache_all_regs(vcpu); | |
37817f29 | 4861 | |
ceffb459 | 4862 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); |
b237ac37 | 4863 | |
ceffb459 GN |
4864 | vcpu->arch.emulate_ctxt.vcpu = vcpu; |
4865 | vcpu->arch.emulate_ctxt.eflags = kvm_x86_ops->get_rflags(vcpu); | |
4866 | vcpu->arch.emulate_ctxt.eip = kvm_rip_read(vcpu); | |
4867 | vcpu->arch.emulate_ctxt.mode = | |
4868 | (!is_protmode(vcpu)) ? X86EMUL_MODE_REAL : | |
4869 | (vcpu->arch.emulate_ctxt.eflags & X86_EFLAGS_VM) | |
4870 | ? X86EMUL_MODE_VM86 : cs_l | |
4871 | ? X86EMUL_MODE_PROT64 : cs_db | |
4872 | ? X86EMUL_MODE_PROT32 : X86EMUL_MODE_PROT16; | |
37817f29 | 4873 | |
ceffb459 | 4874 | ret = emulator_task_switch(&vcpu->arch.emulate_ctxt, &emulate_ops, |
e269fb21 JK |
4875 | tss_selector, reason, has_error_code, |
4876 | error_code); | |
37817f29 | 4877 | |
19d04437 GN |
4878 | if (ret) |
4879 | return EMULATE_FAIL; | |
37817f29 | 4880 | |
19d04437 GN |
4881 | kvm_x86_ops->set_rflags(vcpu, vcpu->arch.emulate_ctxt.eflags); |
4882 | return EMULATE_DONE; | |
37817f29 IE |
4883 | } |
4884 | EXPORT_SYMBOL_GPL(kvm_task_switch); | |
4885 | ||
b6c7a5dc HB |
4886 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, |
4887 | struct kvm_sregs *sregs) | |
4888 | { | |
4889 | int mmu_reset_needed = 0; | |
923c61bb | 4890 | int pending_vec, max_bits; |
89a27f4d | 4891 | struct desc_ptr dt; |
b6c7a5dc HB |
4892 | |
4893 | vcpu_load(vcpu); | |
4894 | ||
89a27f4d GN |
4895 | dt.size = sregs->idt.limit; |
4896 | dt.address = sregs->idt.base; | |
b6c7a5dc | 4897 | kvm_x86_ops->set_idt(vcpu, &dt); |
89a27f4d GN |
4898 | dt.size = sregs->gdt.limit; |
4899 | dt.address = sregs->gdt.base; | |
b6c7a5dc HB |
4900 | kvm_x86_ops->set_gdt(vcpu, &dt); |
4901 | ||
ad312c7c ZX |
4902 | vcpu->arch.cr2 = sregs->cr2; |
4903 | mmu_reset_needed |= vcpu->arch.cr3 != sregs->cr3; | |
dc7e795e | 4904 | vcpu->arch.cr3 = sregs->cr3; |
b6c7a5dc | 4905 | |
2d3ad1f4 | 4906 | kvm_set_cr8(vcpu, sregs->cr8); |
b6c7a5dc | 4907 | |
f6801dff | 4908 | mmu_reset_needed |= vcpu->arch.efer != sregs->efer; |
b6c7a5dc | 4909 | kvm_x86_ops->set_efer(vcpu, sregs->efer); |
b6c7a5dc HB |
4910 | kvm_set_apic_base(vcpu, sregs->apic_base); |
4911 | ||
4d4ec087 | 4912 | mmu_reset_needed |= kvm_read_cr0(vcpu) != sregs->cr0; |
b6c7a5dc | 4913 | kvm_x86_ops->set_cr0(vcpu, sregs->cr0); |
d7306163 | 4914 | vcpu->arch.cr0 = sregs->cr0; |
b6c7a5dc | 4915 | |
fc78f519 | 4916 | mmu_reset_needed |= kvm_read_cr4(vcpu) != sregs->cr4; |
b6c7a5dc | 4917 | kvm_x86_ops->set_cr4(vcpu, sregs->cr4); |
7c93be44 | 4918 | if (!is_long_mode(vcpu) && is_pae(vcpu)) { |
ad312c7c | 4919 | load_pdptrs(vcpu, vcpu->arch.cr3); |
7c93be44 MT |
4920 | mmu_reset_needed = 1; |
4921 | } | |
b6c7a5dc HB |
4922 | |
4923 | if (mmu_reset_needed) | |
4924 | kvm_mmu_reset_context(vcpu); | |
4925 | ||
923c61bb GN |
4926 | max_bits = (sizeof sregs->interrupt_bitmap) << 3; |
4927 | pending_vec = find_first_bit( | |
4928 | (const unsigned long *)sregs->interrupt_bitmap, max_bits); | |
4929 | if (pending_vec < max_bits) { | |
66fd3f7f | 4930 | kvm_queue_interrupt(vcpu, pending_vec, false); |
923c61bb GN |
4931 | pr_debug("Set back pending irq %d\n", pending_vec); |
4932 | if (irqchip_in_kernel(vcpu->kvm)) | |
4933 | kvm_pic_clear_isr_ack(vcpu->kvm); | |
b6c7a5dc HB |
4934 | } |
4935 | ||
3e6e0aab GT |
4936 | kvm_set_segment(vcpu, &sregs->cs, VCPU_SREG_CS); |
4937 | kvm_set_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
4938 | kvm_set_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
4939 | kvm_set_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
4940 | kvm_set_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
4941 | kvm_set_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
b6c7a5dc | 4942 | |
3e6e0aab GT |
4943 | kvm_set_segment(vcpu, &sregs->tr, VCPU_SREG_TR); |
4944 | kvm_set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
b6c7a5dc | 4945 | |
5f0269f5 ME |
4946 | update_cr8_intercept(vcpu); |
4947 | ||
9c3e4aab | 4948 | /* Older userspace won't unhalt the vcpu on reset. */ |
c5af89b6 | 4949 | if (kvm_vcpu_is_bsp(vcpu) && kvm_rip_read(vcpu) == 0xfff0 && |
9c3e4aab | 4950 | sregs->cs.selector == 0xf000 && sregs->cs.base == 0xffff0000 && |
3eeb3288 | 4951 | !is_protmode(vcpu)) |
9c3e4aab MT |
4952 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
4953 | ||
b6c7a5dc HB |
4954 | vcpu_put(vcpu); |
4955 | ||
4956 | return 0; | |
4957 | } | |
4958 | ||
d0bfb940 JK |
4959 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
4960 | struct kvm_guest_debug *dbg) | |
b6c7a5dc | 4961 | { |
355be0b9 | 4962 | unsigned long rflags; |
ae675ef0 | 4963 | int i, r; |
b6c7a5dc HB |
4964 | |
4965 | vcpu_load(vcpu); | |
4966 | ||
4f926bf2 JK |
4967 | if (dbg->control & (KVM_GUESTDBG_INJECT_DB | KVM_GUESTDBG_INJECT_BP)) { |
4968 | r = -EBUSY; | |
4969 | if (vcpu->arch.exception.pending) | |
4970 | goto unlock_out; | |
4971 | if (dbg->control & KVM_GUESTDBG_INJECT_DB) | |
4972 | kvm_queue_exception(vcpu, DB_VECTOR); | |
4973 | else | |
4974 | kvm_queue_exception(vcpu, BP_VECTOR); | |
4975 | } | |
4976 | ||
91586a3b JK |
4977 | /* |
4978 | * Read rflags as long as potentially injected trace flags are still | |
4979 | * filtered out. | |
4980 | */ | |
4981 | rflags = kvm_get_rflags(vcpu); | |
355be0b9 JK |
4982 | |
4983 | vcpu->guest_debug = dbg->control; | |
4984 | if (!(vcpu->guest_debug & KVM_GUESTDBG_ENABLE)) | |
4985 | vcpu->guest_debug = 0; | |
4986 | ||
4987 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) { | |
ae675ef0 JK |
4988 | for (i = 0; i < KVM_NR_DB_REGS; ++i) |
4989 | vcpu->arch.eff_db[i] = dbg->arch.debugreg[i]; | |
4990 | vcpu->arch.switch_db_regs = | |
4991 | (dbg->arch.debugreg[7] & DR7_BP_EN_MASK); | |
4992 | } else { | |
4993 | for (i = 0; i < KVM_NR_DB_REGS; i++) | |
4994 | vcpu->arch.eff_db[i] = vcpu->arch.db[i]; | |
4995 | vcpu->arch.switch_db_regs = (vcpu->arch.dr7 & DR7_BP_EN_MASK); | |
4996 | } | |
4997 | ||
f92653ee JK |
4998 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) |
4999 | vcpu->arch.singlestep_rip = kvm_rip_read(vcpu) + | |
5000 | get_segment_base(vcpu, VCPU_SREG_CS); | |
94fe45da | 5001 | |
91586a3b JK |
5002 | /* |
5003 | * Trigger an rflags update that will inject or remove the trace | |
5004 | * flags. | |
5005 | */ | |
5006 | kvm_set_rflags(vcpu, rflags); | |
b6c7a5dc | 5007 | |
355be0b9 | 5008 | kvm_x86_ops->set_guest_debug(vcpu, dbg); |
b6c7a5dc | 5009 | |
4f926bf2 | 5010 | r = 0; |
d0bfb940 | 5011 | |
4f926bf2 | 5012 | unlock_out: |
b6c7a5dc HB |
5013 | vcpu_put(vcpu); |
5014 | ||
5015 | return r; | |
5016 | } | |
5017 | ||
d0752060 HB |
5018 | /* |
5019 | * fxsave fpu state. Taken from x86_64/processor.h. To be killed when | |
5020 | * we have asm/x86/processor.h | |
5021 | */ | |
5022 | struct fxsave { | |
5023 | u16 cwd; | |
5024 | u16 swd; | |
5025 | u16 twd; | |
5026 | u16 fop; | |
5027 | u64 rip; | |
5028 | u64 rdp; | |
5029 | u32 mxcsr; | |
5030 | u32 mxcsr_mask; | |
5031 | u32 st_space[32]; /* 8*16 bytes for each FP-reg = 128 bytes */ | |
5032 | #ifdef CONFIG_X86_64 | |
5033 | u32 xmm_space[64]; /* 16*16 bytes for each XMM-reg = 256 bytes */ | |
5034 | #else | |
5035 | u32 xmm_space[32]; /* 8*16 bytes for each XMM-reg = 128 bytes */ | |
5036 | #endif | |
5037 | }; | |
5038 | ||
8b006791 ZX |
5039 | /* |
5040 | * Translate a guest virtual address to a guest physical address. | |
5041 | */ | |
5042 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, | |
5043 | struct kvm_translation *tr) | |
5044 | { | |
5045 | unsigned long vaddr = tr->linear_address; | |
5046 | gpa_t gpa; | |
f656ce01 | 5047 | int idx; |
8b006791 ZX |
5048 | |
5049 | vcpu_load(vcpu); | |
f656ce01 | 5050 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
1871c602 | 5051 | gpa = kvm_mmu_gva_to_gpa_system(vcpu, vaddr, NULL); |
f656ce01 | 5052 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
8b006791 ZX |
5053 | tr->physical_address = gpa; |
5054 | tr->valid = gpa != UNMAPPED_GVA; | |
5055 | tr->writeable = 1; | |
5056 | tr->usermode = 0; | |
8b006791 ZX |
5057 | vcpu_put(vcpu); |
5058 | ||
5059 | return 0; | |
5060 | } | |
5061 | ||
d0752060 HB |
5062 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) |
5063 | { | |
ad312c7c | 5064 | struct fxsave *fxsave = (struct fxsave *)&vcpu->arch.guest_fx_image; |
d0752060 HB |
5065 | |
5066 | vcpu_load(vcpu); | |
5067 | ||
5068 | memcpy(fpu->fpr, fxsave->st_space, 128); | |
5069 | fpu->fcw = fxsave->cwd; | |
5070 | fpu->fsw = fxsave->swd; | |
5071 | fpu->ftwx = fxsave->twd; | |
5072 | fpu->last_opcode = fxsave->fop; | |
5073 | fpu->last_ip = fxsave->rip; | |
5074 | fpu->last_dp = fxsave->rdp; | |
5075 | memcpy(fpu->xmm, fxsave->xmm_space, sizeof fxsave->xmm_space); | |
5076 | ||
5077 | vcpu_put(vcpu); | |
5078 | ||
5079 | return 0; | |
5080 | } | |
5081 | ||
5082 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
5083 | { | |
ad312c7c | 5084 | struct fxsave *fxsave = (struct fxsave *)&vcpu->arch.guest_fx_image; |
d0752060 HB |
5085 | |
5086 | vcpu_load(vcpu); | |
5087 | ||
5088 | memcpy(fxsave->st_space, fpu->fpr, 128); | |
5089 | fxsave->cwd = fpu->fcw; | |
5090 | fxsave->swd = fpu->fsw; | |
5091 | fxsave->twd = fpu->ftwx; | |
5092 | fxsave->fop = fpu->last_opcode; | |
5093 | fxsave->rip = fpu->last_ip; | |
5094 | fxsave->rdp = fpu->last_dp; | |
5095 | memcpy(fxsave->xmm_space, fpu->xmm, sizeof fxsave->xmm_space); | |
5096 | ||
5097 | vcpu_put(vcpu); | |
5098 | ||
5099 | return 0; | |
5100 | } | |
5101 | ||
5102 | void fx_init(struct kvm_vcpu *vcpu) | |
5103 | { | |
5104 | unsigned after_mxcsr_mask; | |
5105 | ||
bc1a34f1 AA |
5106 | /* |
5107 | * Touch the fpu the first time in non atomic context as if | |
5108 | * this is the first fpu instruction the exception handler | |
5109 | * will fire before the instruction returns and it'll have to | |
5110 | * allocate ram with GFP_KERNEL. | |
5111 | */ | |
5112 | if (!used_math()) | |
d6e88aec | 5113 | kvm_fx_save(&vcpu->arch.host_fx_image); |
bc1a34f1 | 5114 | |
d0752060 HB |
5115 | /* Initialize guest FPU by resetting ours and saving into guest's */ |
5116 | preempt_disable(); | |
d6e88aec AK |
5117 | kvm_fx_save(&vcpu->arch.host_fx_image); |
5118 | kvm_fx_finit(); | |
5119 | kvm_fx_save(&vcpu->arch.guest_fx_image); | |
5120 | kvm_fx_restore(&vcpu->arch.host_fx_image); | |
d0752060 HB |
5121 | preempt_enable(); |
5122 | ||
ad312c7c | 5123 | vcpu->arch.cr0 |= X86_CR0_ET; |
d0752060 | 5124 | after_mxcsr_mask = offsetof(struct i387_fxsave_struct, st_space); |
ad312c7c ZX |
5125 | vcpu->arch.guest_fx_image.mxcsr = 0x1f80; |
5126 | memset((void *)&vcpu->arch.guest_fx_image + after_mxcsr_mask, | |
d0752060 HB |
5127 | 0, sizeof(struct i387_fxsave_struct) - after_mxcsr_mask); |
5128 | } | |
5129 | EXPORT_SYMBOL_GPL(fx_init); | |
5130 | ||
5131 | void kvm_load_guest_fpu(struct kvm_vcpu *vcpu) | |
5132 | { | |
2608d7a1 | 5133 | if (vcpu->guest_fpu_loaded) |
d0752060 HB |
5134 | return; |
5135 | ||
5136 | vcpu->guest_fpu_loaded = 1; | |
d6e88aec AK |
5137 | kvm_fx_save(&vcpu->arch.host_fx_image); |
5138 | kvm_fx_restore(&vcpu->arch.guest_fx_image); | |
0c04851c | 5139 | trace_kvm_fpu(1); |
d0752060 | 5140 | } |
d0752060 HB |
5141 | |
5142 | void kvm_put_guest_fpu(struct kvm_vcpu *vcpu) | |
5143 | { | |
5144 | if (!vcpu->guest_fpu_loaded) | |
5145 | return; | |
5146 | ||
5147 | vcpu->guest_fpu_loaded = 0; | |
d6e88aec AK |
5148 | kvm_fx_save(&vcpu->arch.guest_fx_image); |
5149 | kvm_fx_restore(&vcpu->arch.host_fx_image); | |
f096ed85 | 5150 | ++vcpu->stat.fpu_reload; |
02daab21 | 5151 | set_bit(KVM_REQ_DEACTIVATE_FPU, &vcpu->requests); |
0c04851c | 5152 | trace_kvm_fpu(0); |
d0752060 | 5153 | } |
e9b11c17 ZX |
5154 | |
5155 | void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu) | |
5156 | { | |
7f1ea208 JR |
5157 | if (vcpu->arch.time_page) { |
5158 | kvm_release_page_dirty(vcpu->arch.time_page); | |
5159 | vcpu->arch.time_page = NULL; | |
5160 | } | |
5161 | ||
e9b11c17 ZX |
5162 | kvm_x86_ops->vcpu_free(vcpu); |
5163 | } | |
5164 | ||
5165 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, | |
5166 | unsigned int id) | |
5167 | { | |
26e5215f AK |
5168 | return kvm_x86_ops->vcpu_create(kvm, id); |
5169 | } | |
e9b11c17 | 5170 | |
26e5215f AK |
5171 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) |
5172 | { | |
5173 | int r; | |
e9b11c17 ZX |
5174 | |
5175 | /* We do fxsave: this must be aligned. */ | |
ad312c7c | 5176 | BUG_ON((unsigned long)&vcpu->arch.host_fx_image & 0xF); |
e9b11c17 | 5177 | |
0bed3b56 | 5178 | vcpu->arch.mtrr_state.have_fixed = 1; |
e9b11c17 ZX |
5179 | vcpu_load(vcpu); |
5180 | r = kvm_arch_vcpu_reset(vcpu); | |
5181 | if (r == 0) | |
5182 | r = kvm_mmu_setup(vcpu); | |
5183 | vcpu_put(vcpu); | |
5184 | if (r < 0) | |
5185 | goto free_vcpu; | |
5186 | ||
26e5215f | 5187 | return 0; |
e9b11c17 ZX |
5188 | free_vcpu: |
5189 | kvm_x86_ops->vcpu_free(vcpu); | |
26e5215f | 5190 | return r; |
e9b11c17 ZX |
5191 | } |
5192 | ||
d40ccc62 | 5193 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
e9b11c17 ZX |
5194 | { |
5195 | vcpu_load(vcpu); | |
5196 | kvm_mmu_unload(vcpu); | |
5197 | vcpu_put(vcpu); | |
5198 | ||
5199 | kvm_x86_ops->vcpu_free(vcpu); | |
5200 | } | |
5201 | ||
5202 | int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu) | |
5203 | { | |
448fa4a9 JK |
5204 | vcpu->arch.nmi_pending = false; |
5205 | vcpu->arch.nmi_injected = false; | |
5206 | ||
42dbaa5a JK |
5207 | vcpu->arch.switch_db_regs = 0; |
5208 | memset(vcpu->arch.db, 0, sizeof(vcpu->arch.db)); | |
5209 | vcpu->arch.dr6 = DR6_FIXED_1; | |
5210 | vcpu->arch.dr7 = DR7_FIXED_1; | |
5211 | ||
e9b11c17 ZX |
5212 | return kvm_x86_ops->vcpu_reset(vcpu); |
5213 | } | |
5214 | ||
10474ae8 | 5215 | int kvm_arch_hardware_enable(void *garbage) |
e9b11c17 | 5216 | { |
0cca7907 ZA |
5217 | /* |
5218 | * Since this may be called from a hotplug notifcation, | |
5219 | * we can't get the CPU frequency directly. | |
5220 | */ | |
5221 | if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) { | |
5222 | int cpu = raw_smp_processor_id(); | |
5223 | per_cpu(cpu_tsc_khz, cpu) = 0; | |
5224 | } | |
18863bdd AK |
5225 | |
5226 | kvm_shared_msr_cpu_online(); | |
5227 | ||
10474ae8 | 5228 | return kvm_x86_ops->hardware_enable(garbage); |
e9b11c17 ZX |
5229 | } |
5230 | ||
5231 | void kvm_arch_hardware_disable(void *garbage) | |
5232 | { | |
5233 | kvm_x86_ops->hardware_disable(garbage); | |
3548bab5 | 5234 | drop_user_return_notifiers(garbage); |
e9b11c17 ZX |
5235 | } |
5236 | ||
5237 | int kvm_arch_hardware_setup(void) | |
5238 | { | |
5239 | return kvm_x86_ops->hardware_setup(); | |
5240 | } | |
5241 | ||
5242 | void kvm_arch_hardware_unsetup(void) | |
5243 | { | |
5244 | kvm_x86_ops->hardware_unsetup(); | |
5245 | } | |
5246 | ||
5247 | void kvm_arch_check_processor_compat(void *rtn) | |
5248 | { | |
5249 | kvm_x86_ops->check_processor_compatibility(rtn); | |
5250 | } | |
5251 | ||
5252 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) | |
5253 | { | |
5254 | struct page *page; | |
5255 | struct kvm *kvm; | |
5256 | int r; | |
5257 | ||
5258 | BUG_ON(vcpu->kvm == NULL); | |
5259 | kvm = vcpu->kvm; | |
5260 | ||
ad312c7c | 5261 | vcpu->arch.mmu.root_hpa = INVALID_PAGE; |
c5af89b6 | 5262 | if (!irqchip_in_kernel(kvm) || kvm_vcpu_is_bsp(vcpu)) |
a4535290 | 5263 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
e9b11c17 | 5264 | else |
a4535290 | 5265 | vcpu->arch.mp_state = KVM_MP_STATE_UNINITIALIZED; |
e9b11c17 ZX |
5266 | |
5267 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
5268 | if (!page) { | |
5269 | r = -ENOMEM; | |
5270 | goto fail; | |
5271 | } | |
ad312c7c | 5272 | vcpu->arch.pio_data = page_address(page); |
e9b11c17 ZX |
5273 | |
5274 | r = kvm_mmu_create(vcpu); | |
5275 | if (r < 0) | |
5276 | goto fail_free_pio_data; | |
5277 | ||
5278 | if (irqchip_in_kernel(kvm)) { | |
5279 | r = kvm_create_lapic(vcpu); | |
5280 | if (r < 0) | |
5281 | goto fail_mmu_destroy; | |
5282 | } | |
5283 | ||
890ca9ae HY |
5284 | vcpu->arch.mce_banks = kzalloc(KVM_MAX_MCE_BANKS * sizeof(u64) * 4, |
5285 | GFP_KERNEL); | |
5286 | if (!vcpu->arch.mce_banks) { | |
5287 | r = -ENOMEM; | |
443c39bc | 5288 | goto fail_free_lapic; |
890ca9ae HY |
5289 | } |
5290 | vcpu->arch.mcg_cap = KVM_MAX_MCE_BANKS; | |
5291 | ||
e9b11c17 | 5292 | return 0; |
443c39bc WY |
5293 | fail_free_lapic: |
5294 | kvm_free_lapic(vcpu); | |
e9b11c17 ZX |
5295 | fail_mmu_destroy: |
5296 | kvm_mmu_destroy(vcpu); | |
5297 | fail_free_pio_data: | |
ad312c7c | 5298 | free_page((unsigned long)vcpu->arch.pio_data); |
e9b11c17 ZX |
5299 | fail: |
5300 | return r; | |
5301 | } | |
5302 | ||
5303 | void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) | |
5304 | { | |
f656ce01 MT |
5305 | int idx; |
5306 | ||
36cb93fd | 5307 | kfree(vcpu->arch.mce_banks); |
e9b11c17 | 5308 | kvm_free_lapic(vcpu); |
f656ce01 | 5309 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
e9b11c17 | 5310 | kvm_mmu_destroy(vcpu); |
f656ce01 | 5311 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
ad312c7c | 5312 | free_page((unsigned long)vcpu->arch.pio_data); |
e9b11c17 | 5313 | } |
d19a9cd2 ZX |
5314 | |
5315 | struct kvm *kvm_arch_create_vm(void) | |
5316 | { | |
5317 | struct kvm *kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL); | |
5318 | ||
5319 | if (!kvm) | |
5320 | return ERR_PTR(-ENOMEM); | |
5321 | ||
fef9cce0 MT |
5322 | kvm->arch.aliases = kzalloc(sizeof(struct kvm_mem_aliases), GFP_KERNEL); |
5323 | if (!kvm->arch.aliases) { | |
5324 | kfree(kvm); | |
5325 | return ERR_PTR(-ENOMEM); | |
5326 | } | |
5327 | ||
f05e70ac | 5328 | INIT_LIST_HEAD(&kvm->arch.active_mmu_pages); |
4d5c5d0f | 5329 | INIT_LIST_HEAD(&kvm->arch.assigned_dev_head); |
d19a9cd2 | 5330 | |
5550af4d SY |
5331 | /* Reserve bit 0 of irq_sources_bitmap for userspace irq source */ |
5332 | set_bit(KVM_USERSPACE_IRQ_SOURCE_ID, &kvm->arch.irq_sources_bitmap); | |
5333 | ||
53f658b3 MT |
5334 | rdtscll(kvm->arch.vm_init_tsc); |
5335 | ||
d19a9cd2 ZX |
5336 | return kvm; |
5337 | } | |
5338 | ||
5339 | static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu) | |
5340 | { | |
5341 | vcpu_load(vcpu); | |
5342 | kvm_mmu_unload(vcpu); | |
5343 | vcpu_put(vcpu); | |
5344 | } | |
5345 | ||
5346 | static void kvm_free_vcpus(struct kvm *kvm) | |
5347 | { | |
5348 | unsigned int i; | |
988a2cae | 5349 | struct kvm_vcpu *vcpu; |
d19a9cd2 ZX |
5350 | |
5351 | /* | |
5352 | * Unpin any mmu pages first. | |
5353 | */ | |
988a2cae GN |
5354 | kvm_for_each_vcpu(i, vcpu, kvm) |
5355 | kvm_unload_vcpu_mmu(vcpu); | |
5356 | kvm_for_each_vcpu(i, vcpu, kvm) | |
5357 | kvm_arch_vcpu_free(vcpu); | |
5358 | ||
5359 | mutex_lock(&kvm->lock); | |
5360 | for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) | |
5361 | kvm->vcpus[i] = NULL; | |
d19a9cd2 | 5362 | |
988a2cae GN |
5363 | atomic_set(&kvm->online_vcpus, 0); |
5364 | mutex_unlock(&kvm->lock); | |
d19a9cd2 ZX |
5365 | } |
5366 | ||
ad8ba2cd SY |
5367 | void kvm_arch_sync_events(struct kvm *kvm) |
5368 | { | |
ba4cef31 | 5369 | kvm_free_all_assigned_devices(kvm); |
ad8ba2cd SY |
5370 | } |
5371 | ||
d19a9cd2 ZX |
5372 | void kvm_arch_destroy_vm(struct kvm *kvm) |
5373 | { | |
6eb55818 | 5374 | kvm_iommu_unmap_guest(kvm); |
7837699f | 5375 | kvm_free_pit(kvm); |
d7deeeb0 ZX |
5376 | kfree(kvm->arch.vpic); |
5377 | kfree(kvm->arch.vioapic); | |
d19a9cd2 ZX |
5378 | kvm_free_vcpus(kvm); |
5379 | kvm_free_physmem(kvm); | |
3d45830c AK |
5380 | if (kvm->arch.apic_access_page) |
5381 | put_page(kvm->arch.apic_access_page); | |
b7ebfb05 SY |
5382 | if (kvm->arch.ept_identity_pagetable) |
5383 | put_page(kvm->arch.ept_identity_pagetable); | |
64749204 | 5384 | cleanup_srcu_struct(&kvm->srcu); |
fef9cce0 | 5385 | kfree(kvm->arch.aliases); |
d19a9cd2 ZX |
5386 | kfree(kvm); |
5387 | } | |
0de10343 | 5388 | |
f7784b8e MT |
5389 | int kvm_arch_prepare_memory_region(struct kvm *kvm, |
5390 | struct kvm_memory_slot *memslot, | |
0de10343 | 5391 | struct kvm_memory_slot old, |
f7784b8e | 5392 | struct kvm_userspace_memory_region *mem, |
0de10343 ZX |
5393 | int user_alloc) |
5394 | { | |
f7784b8e | 5395 | int npages = memslot->npages; |
0de10343 ZX |
5396 | |
5397 | /*To keep backward compatibility with older userspace, | |
5398 | *x86 needs to hanlde !user_alloc case. | |
5399 | */ | |
5400 | if (!user_alloc) { | |
5401 | if (npages && !old.rmap) { | |
604b38ac AA |
5402 | unsigned long userspace_addr; |
5403 | ||
72dc67a6 | 5404 | down_write(¤t->mm->mmap_sem); |
604b38ac AA |
5405 | userspace_addr = do_mmap(NULL, 0, |
5406 | npages * PAGE_SIZE, | |
5407 | PROT_READ | PROT_WRITE, | |
acee3c04 | 5408 | MAP_PRIVATE | MAP_ANONYMOUS, |
604b38ac | 5409 | 0); |
72dc67a6 | 5410 | up_write(¤t->mm->mmap_sem); |
0de10343 | 5411 | |
604b38ac AA |
5412 | if (IS_ERR((void *)userspace_addr)) |
5413 | return PTR_ERR((void *)userspace_addr); | |
5414 | ||
604b38ac | 5415 | memslot->userspace_addr = userspace_addr; |
0de10343 ZX |
5416 | } |
5417 | } | |
5418 | ||
f7784b8e MT |
5419 | |
5420 | return 0; | |
5421 | } | |
5422 | ||
5423 | void kvm_arch_commit_memory_region(struct kvm *kvm, | |
5424 | struct kvm_userspace_memory_region *mem, | |
5425 | struct kvm_memory_slot old, | |
5426 | int user_alloc) | |
5427 | { | |
5428 | ||
5429 | int npages = mem->memory_size >> PAGE_SHIFT; | |
5430 | ||
5431 | if (!user_alloc && !old.user_alloc && old.rmap && !npages) { | |
5432 | int ret; | |
5433 | ||
5434 | down_write(¤t->mm->mmap_sem); | |
5435 | ret = do_munmap(current->mm, old.userspace_addr, | |
5436 | old.npages * PAGE_SIZE); | |
5437 | up_write(¤t->mm->mmap_sem); | |
5438 | if (ret < 0) | |
5439 | printk(KERN_WARNING | |
5440 | "kvm_vm_ioctl_set_memory_region: " | |
5441 | "failed to munmap memory\n"); | |
5442 | } | |
5443 | ||
7c8a83b7 | 5444 | spin_lock(&kvm->mmu_lock); |
f05e70ac | 5445 | if (!kvm->arch.n_requested_mmu_pages) { |
0de10343 ZX |
5446 | unsigned int nr_mmu_pages = kvm_mmu_calculate_mmu_pages(kvm); |
5447 | kvm_mmu_change_mmu_pages(kvm, nr_mmu_pages); | |
5448 | } | |
5449 | ||
5450 | kvm_mmu_slot_remove_write_access(kvm, mem->slot); | |
7c8a83b7 | 5451 | spin_unlock(&kvm->mmu_lock); |
0de10343 | 5452 | } |
1d737c8a | 5453 | |
34d4cb8f MT |
5454 | void kvm_arch_flush_shadow(struct kvm *kvm) |
5455 | { | |
5456 | kvm_mmu_zap_all(kvm); | |
8986ecc0 | 5457 | kvm_reload_remote_mmus(kvm); |
34d4cb8f MT |
5458 | } |
5459 | ||
1d737c8a ZX |
5460 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
5461 | { | |
a4535290 | 5462 | return vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE |
a1b37100 GN |
5463 | || vcpu->arch.mp_state == KVM_MP_STATE_SIPI_RECEIVED |
5464 | || vcpu->arch.nmi_pending || | |
5465 | (kvm_arch_interrupt_allowed(vcpu) && | |
5466 | kvm_cpu_has_interrupt(vcpu)); | |
1d737c8a | 5467 | } |
5736199a | 5468 | |
5736199a ZX |
5469 | void kvm_vcpu_kick(struct kvm_vcpu *vcpu) |
5470 | { | |
32f88400 MT |
5471 | int me; |
5472 | int cpu = vcpu->cpu; | |
5736199a ZX |
5473 | |
5474 | if (waitqueue_active(&vcpu->wq)) { | |
5475 | wake_up_interruptible(&vcpu->wq); | |
5476 | ++vcpu->stat.halt_wakeup; | |
5477 | } | |
32f88400 MT |
5478 | |
5479 | me = get_cpu(); | |
5480 | if (cpu != me && (unsigned)cpu < nr_cpu_ids && cpu_online(cpu)) | |
5481 | if (!test_and_set_bit(KVM_REQ_KICK, &vcpu->requests)) | |
5482 | smp_send_reschedule(cpu); | |
e9571ed5 | 5483 | put_cpu(); |
5736199a | 5484 | } |
78646121 GN |
5485 | |
5486 | int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu) | |
5487 | { | |
5488 | return kvm_x86_ops->interrupt_allowed(vcpu); | |
5489 | } | |
229456fc | 5490 | |
f92653ee JK |
5491 | bool kvm_is_linear_rip(struct kvm_vcpu *vcpu, unsigned long linear_rip) |
5492 | { | |
5493 | unsigned long current_rip = kvm_rip_read(vcpu) + | |
5494 | get_segment_base(vcpu, VCPU_SREG_CS); | |
5495 | ||
5496 | return current_rip == linear_rip; | |
5497 | } | |
5498 | EXPORT_SYMBOL_GPL(kvm_is_linear_rip); | |
5499 | ||
94fe45da JK |
5500 | unsigned long kvm_get_rflags(struct kvm_vcpu *vcpu) |
5501 | { | |
5502 | unsigned long rflags; | |
5503 | ||
5504 | rflags = kvm_x86_ops->get_rflags(vcpu); | |
5505 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) | |
c310bac5 | 5506 | rflags &= ~X86_EFLAGS_TF; |
94fe45da JK |
5507 | return rflags; |
5508 | } | |
5509 | EXPORT_SYMBOL_GPL(kvm_get_rflags); | |
5510 | ||
5511 | void kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags) | |
5512 | { | |
5513 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP && | |
f92653ee | 5514 | kvm_is_linear_rip(vcpu, vcpu->arch.singlestep_rip)) |
c310bac5 | 5515 | rflags |= X86_EFLAGS_TF; |
94fe45da JK |
5516 | kvm_x86_ops->set_rflags(vcpu, rflags); |
5517 | } | |
5518 | EXPORT_SYMBOL_GPL(kvm_set_rflags); | |
5519 | ||
229456fc MT |
5520 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_exit); |
5521 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_inj_virq); | |
5522 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_page_fault); | |
5523 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_msr); | |
5524 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_cr); | |
0ac406de | 5525 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmrun); |
d8cabddf | 5526 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit); |
17897f36 | 5527 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit_inject); |
236649de | 5528 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intr_vmexit); |
ec1ff790 | 5529 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_invlpga); |
532a46b9 | 5530 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_skinit); |
2e554e8d | 5531 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intercepts); |