]>
Commit | Line | Data |
---|---|---|
043405e1 CO |
1 | /* |
2 | * Kernel-based Virtual Machine driver for Linux | |
3 | * | |
4 | * derived from drivers/kvm/kvm_main.c | |
5 | * | |
6 | * Copyright (C) 2006 Qumranet, Inc. | |
4d5c5d0f BAY |
7 | * Copyright (C) 2008 Qumranet, Inc. |
8 | * Copyright IBM Corporation, 2008 | |
221d059d | 9 | * Copyright 2010 Red Hat, Inc. and/or its affilates. |
043405e1 CO |
10 | * |
11 | * Authors: | |
12 | * Avi Kivity <avi@qumranet.com> | |
13 | * Yaniv Kamay <yaniv@qumranet.com> | |
4d5c5d0f BAY |
14 | * Amit Shah <amit.shah@qumranet.com> |
15 | * Ben-Ami Yassour <benami@il.ibm.com> | |
043405e1 CO |
16 | * |
17 | * This work is licensed under the terms of the GNU GPL, version 2. See | |
18 | * the COPYING file in the top-level directory. | |
19 | * | |
20 | */ | |
21 | ||
edf88417 | 22 | #include <linux/kvm_host.h> |
313a3dc7 | 23 | #include "irq.h" |
1d737c8a | 24 | #include "mmu.h" |
7837699f | 25 | #include "i8254.h" |
37817f29 | 26 | #include "tss.h" |
5fdbf976 | 27 | #include "kvm_cache_regs.h" |
26eef70c | 28 | #include "x86.h" |
313a3dc7 | 29 | |
18068523 | 30 | #include <linux/clocksource.h> |
4d5c5d0f | 31 | #include <linux/interrupt.h> |
313a3dc7 CO |
32 | #include <linux/kvm.h> |
33 | #include <linux/fs.h> | |
34 | #include <linux/vmalloc.h> | |
5fb76f9b | 35 | #include <linux/module.h> |
0de10343 | 36 | #include <linux/mman.h> |
2bacc55c | 37 | #include <linux/highmem.h> |
19de40a8 | 38 | #include <linux/iommu.h> |
62c476c7 | 39 | #include <linux/intel-iommu.h> |
c8076604 | 40 | #include <linux/cpufreq.h> |
18863bdd | 41 | #include <linux/user-return-notifier.h> |
a983fb23 | 42 | #include <linux/srcu.h> |
5a0e3ad6 | 43 | #include <linux/slab.h> |
ff9d07a0 | 44 | #include <linux/perf_event.h> |
7bee342a | 45 | #include <linux/uaccess.h> |
aec51dc4 | 46 | #include <trace/events/kvm.h> |
2ed152af | 47 | |
229456fc MT |
48 | #define CREATE_TRACE_POINTS |
49 | #include "trace.h" | |
043405e1 | 50 | |
24f1e32c | 51 | #include <asm/debugreg.h> |
d825ed0a | 52 | #include <asm/msr.h> |
a5f61300 | 53 | #include <asm/desc.h> |
0bed3b56 | 54 | #include <asm/mtrr.h> |
890ca9ae | 55 | #include <asm/mce.h> |
7cf30855 | 56 | #include <asm/i387.h> |
98918833 | 57 | #include <asm/xcr.h> |
043405e1 | 58 | |
313a3dc7 | 59 | #define MAX_IO_MSRS 256 |
a03490ed CO |
60 | #define CR0_RESERVED_BITS \ |
61 | (~(unsigned long)(X86_CR0_PE | X86_CR0_MP | X86_CR0_EM | X86_CR0_TS \ | |
62 | | X86_CR0_ET | X86_CR0_NE | X86_CR0_WP | X86_CR0_AM \ | |
63 | | X86_CR0_NW | X86_CR0_CD | X86_CR0_PG)) | |
64 | #define CR4_RESERVED_BITS \ | |
65 | (~(unsigned long)(X86_CR4_VME | X86_CR4_PVI | X86_CR4_TSD | X86_CR4_DE\ | |
66 | | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_MCE \ | |
67 | | X86_CR4_PGE | X86_CR4_PCE | X86_CR4_OSFXSR \ | |
68 | | X86_CR4_OSXMMEXCPT | X86_CR4_VMXE)) | |
69 | ||
70 | #define CR8_RESERVED_BITS (~(unsigned long)X86_CR8_TPR) | |
890ca9ae HY |
71 | |
72 | #define KVM_MAX_MCE_BANKS 32 | |
73 | #define KVM_MCE_CAP_SUPPORTED MCG_CTL_P | |
74 | ||
50a37eb4 JR |
75 | /* EFER defaults: |
76 | * - enable syscall per default because its emulated by KVM | |
77 | * - enable LME and LMA per default on 64 bit KVM | |
78 | */ | |
79 | #ifdef CONFIG_X86_64 | |
80 | static u64 __read_mostly efer_reserved_bits = 0xfffffffffffffafeULL; | |
81 | #else | |
82 | static u64 __read_mostly efer_reserved_bits = 0xfffffffffffffffeULL; | |
83 | #endif | |
313a3dc7 | 84 | |
ba1389b7 AK |
85 | #define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM |
86 | #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU | |
417bc304 | 87 | |
cb142eb7 | 88 | static void update_cr8_intercept(struct kvm_vcpu *vcpu); |
674eea0f AK |
89 | static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2 *cpuid, |
90 | struct kvm_cpuid_entry2 __user *entries); | |
91 | ||
97896d04 | 92 | struct kvm_x86_ops *kvm_x86_ops; |
5fdbf976 | 93 | EXPORT_SYMBOL_GPL(kvm_x86_ops); |
97896d04 | 94 | |
ed85c068 AP |
95 | int ignore_msrs = 0; |
96 | module_param_named(ignore_msrs, ignore_msrs, bool, S_IRUGO | S_IWUSR); | |
97 | ||
18863bdd AK |
98 | #define KVM_NR_SHARED_MSRS 16 |
99 | ||
100 | struct kvm_shared_msrs_global { | |
101 | int nr; | |
2bf78fa7 | 102 | u32 msrs[KVM_NR_SHARED_MSRS]; |
18863bdd AK |
103 | }; |
104 | ||
105 | struct kvm_shared_msrs { | |
106 | struct user_return_notifier urn; | |
107 | bool registered; | |
2bf78fa7 SY |
108 | struct kvm_shared_msr_values { |
109 | u64 host; | |
110 | u64 curr; | |
111 | } values[KVM_NR_SHARED_MSRS]; | |
18863bdd AK |
112 | }; |
113 | ||
114 | static struct kvm_shared_msrs_global __read_mostly shared_msrs_global; | |
115 | static DEFINE_PER_CPU(struct kvm_shared_msrs, shared_msrs); | |
116 | ||
417bc304 | 117 | struct kvm_stats_debugfs_item debugfs_entries[] = { |
ba1389b7 AK |
118 | { "pf_fixed", VCPU_STAT(pf_fixed) }, |
119 | { "pf_guest", VCPU_STAT(pf_guest) }, | |
120 | { "tlb_flush", VCPU_STAT(tlb_flush) }, | |
121 | { "invlpg", VCPU_STAT(invlpg) }, | |
122 | { "exits", VCPU_STAT(exits) }, | |
123 | { "io_exits", VCPU_STAT(io_exits) }, | |
124 | { "mmio_exits", VCPU_STAT(mmio_exits) }, | |
125 | { "signal_exits", VCPU_STAT(signal_exits) }, | |
126 | { "irq_window", VCPU_STAT(irq_window_exits) }, | |
f08864b4 | 127 | { "nmi_window", VCPU_STAT(nmi_window_exits) }, |
ba1389b7 AK |
128 | { "halt_exits", VCPU_STAT(halt_exits) }, |
129 | { "halt_wakeup", VCPU_STAT(halt_wakeup) }, | |
f11c3a8d | 130 | { "hypercalls", VCPU_STAT(hypercalls) }, |
ba1389b7 AK |
131 | { "request_irq", VCPU_STAT(request_irq_exits) }, |
132 | { "irq_exits", VCPU_STAT(irq_exits) }, | |
133 | { "host_state_reload", VCPU_STAT(host_state_reload) }, | |
134 | { "efer_reload", VCPU_STAT(efer_reload) }, | |
135 | { "fpu_reload", VCPU_STAT(fpu_reload) }, | |
136 | { "insn_emulation", VCPU_STAT(insn_emulation) }, | |
137 | { "insn_emulation_fail", VCPU_STAT(insn_emulation_fail) }, | |
fa89a817 | 138 | { "irq_injections", VCPU_STAT(irq_injections) }, |
c4abb7c9 | 139 | { "nmi_injections", VCPU_STAT(nmi_injections) }, |
4cee5764 AK |
140 | { "mmu_shadow_zapped", VM_STAT(mmu_shadow_zapped) }, |
141 | { "mmu_pte_write", VM_STAT(mmu_pte_write) }, | |
142 | { "mmu_pte_updated", VM_STAT(mmu_pte_updated) }, | |
143 | { "mmu_pde_zapped", VM_STAT(mmu_pde_zapped) }, | |
144 | { "mmu_flooded", VM_STAT(mmu_flooded) }, | |
145 | { "mmu_recycled", VM_STAT(mmu_recycled) }, | |
dfc5aa00 | 146 | { "mmu_cache_miss", VM_STAT(mmu_cache_miss) }, |
4731d4c7 | 147 | { "mmu_unsync", VM_STAT(mmu_unsync) }, |
0f74a24c | 148 | { "remote_tlb_flush", VM_STAT(remote_tlb_flush) }, |
05da4558 | 149 | { "largepages", VM_STAT(lpages) }, |
417bc304 HB |
150 | { NULL } |
151 | }; | |
152 | ||
18863bdd AK |
153 | static void kvm_on_user_return(struct user_return_notifier *urn) |
154 | { | |
155 | unsigned slot; | |
18863bdd AK |
156 | struct kvm_shared_msrs *locals |
157 | = container_of(urn, struct kvm_shared_msrs, urn); | |
2bf78fa7 | 158 | struct kvm_shared_msr_values *values; |
18863bdd AK |
159 | |
160 | for (slot = 0; slot < shared_msrs_global.nr; ++slot) { | |
2bf78fa7 SY |
161 | values = &locals->values[slot]; |
162 | if (values->host != values->curr) { | |
163 | wrmsrl(shared_msrs_global.msrs[slot], values->host); | |
164 | values->curr = values->host; | |
18863bdd AK |
165 | } |
166 | } | |
167 | locals->registered = false; | |
168 | user_return_notifier_unregister(urn); | |
169 | } | |
170 | ||
2bf78fa7 | 171 | static void shared_msr_update(unsigned slot, u32 msr) |
18863bdd | 172 | { |
2bf78fa7 | 173 | struct kvm_shared_msrs *smsr; |
18863bdd AK |
174 | u64 value; |
175 | ||
2bf78fa7 SY |
176 | smsr = &__get_cpu_var(shared_msrs); |
177 | /* only read, and nobody should modify it at this time, | |
178 | * so don't need lock */ | |
179 | if (slot >= shared_msrs_global.nr) { | |
180 | printk(KERN_ERR "kvm: invalid MSR slot!"); | |
181 | return; | |
182 | } | |
183 | rdmsrl_safe(msr, &value); | |
184 | smsr->values[slot].host = value; | |
185 | smsr->values[slot].curr = value; | |
186 | } | |
187 | ||
188 | void kvm_define_shared_msr(unsigned slot, u32 msr) | |
189 | { | |
18863bdd AK |
190 | if (slot >= shared_msrs_global.nr) |
191 | shared_msrs_global.nr = slot + 1; | |
2bf78fa7 SY |
192 | shared_msrs_global.msrs[slot] = msr; |
193 | /* we need ensured the shared_msr_global have been updated */ | |
194 | smp_wmb(); | |
18863bdd AK |
195 | } |
196 | EXPORT_SYMBOL_GPL(kvm_define_shared_msr); | |
197 | ||
198 | static void kvm_shared_msr_cpu_online(void) | |
199 | { | |
200 | unsigned i; | |
18863bdd AK |
201 | |
202 | for (i = 0; i < shared_msrs_global.nr; ++i) | |
2bf78fa7 | 203 | shared_msr_update(i, shared_msrs_global.msrs[i]); |
18863bdd AK |
204 | } |
205 | ||
d5696725 | 206 | void kvm_set_shared_msr(unsigned slot, u64 value, u64 mask) |
18863bdd AK |
207 | { |
208 | struct kvm_shared_msrs *smsr = &__get_cpu_var(shared_msrs); | |
209 | ||
2bf78fa7 | 210 | if (((value ^ smsr->values[slot].curr) & mask) == 0) |
18863bdd | 211 | return; |
2bf78fa7 SY |
212 | smsr->values[slot].curr = value; |
213 | wrmsrl(shared_msrs_global.msrs[slot], value); | |
18863bdd AK |
214 | if (!smsr->registered) { |
215 | smsr->urn.on_user_return = kvm_on_user_return; | |
216 | user_return_notifier_register(&smsr->urn); | |
217 | smsr->registered = true; | |
218 | } | |
219 | } | |
220 | EXPORT_SYMBOL_GPL(kvm_set_shared_msr); | |
221 | ||
3548bab5 AK |
222 | static void drop_user_return_notifiers(void *ignore) |
223 | { | |
224 | struct kvm_shared_msrs *smsr = &__get_cpu_var(shared_msrs); | |
225 | ||
226 | if (smsr->registered) | |
227 | kvm_on_user_return(&smsr->urn); | |
228 | } | |
229 | ||
6866b83e CO |
230 | u64 kvm_get_apic_base(struct kvm_vcpu *vcpu) |
231 | { | |
232 | if (irqchip_in_kernel(vcpu->kvm)) | |
ad312c7c | 233 | return vcpu->arch.apic_base; |
6866b83e | 234 | else |
ad312c7c | 235 | return vcpu->arch.apic_base; |
6866b83e CO |
236 | } |
237 | EXPORT_SYMBOL_GPL(kvm_get_apic_base); | |
238 | ||
239 | void kvm_set_apic_base(struct kvm_vcpu *vcpu, u64 data) | |
240 | { | |
241 | /* TODO: reserve bits check */ | |
242 | if (irqchip_in_kernel(vcpu->kvm)) | |
243 | kvm_lapic_set_base(vcpu, data); | |
244 | else | |
ad312c7c | 245 | vcpu->arch.apic_base = data; |
6866b83e CO |
246 | } |
247 | EXPORT_SYMBOL_GPL(kvm_set_apic_base); | |
248 | ||
3fd28fce ED |
249 | #define EXCPT_BENIGN 0 |
250 | #define EXCPT_CONTRIBUTORY 1 | |
251 | #define EXCPT_PF 2 | |
252 | ||
253 | static int exception_class(int vector) | |
254 | { | |
255 | switch (vector) { | |
256 | case PF_VECTOR: | |
257 | return EXCPT_PF; | |
258 | case DE_VECTOR: | |
259 | case TS_VECTOR: | |
260 | case NP_VECTOR: | |
261 | case SS_VECTOR: | |
262 | case GP_VECTOR: | |
263 | return EXCPT_CONTRIBUTORY; | |
264 | default: | |
265 | break; | |
266 | } | |
267 | return EXCPT_BENIGN; | |
268 | } | |
269 | ||
270 | static void kvm_multiple_exception(struct kvm_vcpu *vcpu, | |
ce7ddec4 JR |
271 | unsigned nr, bool has_error, u32 error_code, |
272 | bool reinject) | |
3fd28fce ED |
273 | { |
274 | u32 prev_nr; | |
275 | int class1, class2; | |
276 | ||
277 | if (!vcpu->arch.exception.pending) { | |
278 | queue: | |
279 | vcpu->arch.exception.pending = true; | |
280 | vcpu->arch.exception.has_error_code = has_error; | |
281 | vcpu->arch.exception.nr = nr; | |
282 | vcpu->arch.exception.error_code = error_code; | |
3f0fd292 | 283 | vcpu->arch.exception.reinject = reinject; |
3fd28fce ED |
284 | return; |
285 | } | |
286 | ||
287 | /* to check exception */ | |
288 | prev_nr = vcpu->arch.exception.nr; | |
289 | if (prev_nr == DF_VECTOR) { | |
290 | /* triple fault -> shutdown */ | |
291 | set_bit(KVM_REQ_TRIPLE_FAULT, &vcpu->requests); | |
292 | return; | |
293 | } | |
294 | class1 = exception_class(prev_nr); | |
295 | class2 = exception_class(nr); | |
296 | if ((class1 == EXCPT_CONTRIBUTORY && class2 == EXCPT_CONTRIBUTORY) | |
297 | || (class1 == EXCPT_PF && class2 != EXCPT_BENIGN)) { | |
298 | /* generate double fault per SDM Table 5-5 */ | |
299 | vcpu->arch.exception.pending = true; | |
300 | vcpu->arch.exception.has_error_code = true; | |
301 | vcpu->arch.exception.nr = DF_VECTOR; | |
302 | vcpu->arch.exception.error_code = 0; | |
303 | } else | |
304 | /* replace previous exception with a new one in a hope | |
305 | that instruction re-execution will regenerate lost | |
306 | exception */ | |
307 | goto queue; | |
308 | } | |
309 | ||
298101da AK |
310 | void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr) |
311 | { | |
ce7ddec4 | 312 | kvm_multiple_exception(vcpu, nr, false, 0, false); |
298101da AK |
313 | } |
314 | EXPORT_SYMBOL_GPL(kvm_queue_exception); | |
315 | ||
ce7ddec4 JR |
316 | void kvm_requeue_exception(struct kvm_vcpu *vcpu, unsigned nr) |
317 | { | |
318 | kvm_multiple_exception(vcpu, nr, false, 0, true); | |
319 | } | |
320 | EXPORT_SYMBOL_GPL(kvm_requeue_exception); | |
321 | ||
c3c91fee AK |
322 | void kvm_inject_page_fault(struct kvm_vcpu *vcpu, unsigned long addr, |
323 | u32 error_code) | |
324 | { | |
325 | ++vcpu->stat.pf_guest; | |
ad312c7c | 326 | vcpu->arch.cr2 = addr; |
c3c91fee AK |
327 | kvm_queue_exception_e(vcpu, PF_VECTOR, error_code); |
328 | } | |
329 | ||
3419ffc8 SY |
330 | void kvm_inject_nmi(struct kvm_vcpu *vcpu) |
331 | { | |
332 | vcpu->arch.nmi_pending = 1; | |
333 | } | |
334 | EXPORT_SYMBOL_GPL(kvm_inject_nmi); | |
335 | ||
298101da AK |
336 | void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code) |
337 | { | |
ce7ddec4 | 338 | kvm_multiple_exception(vcpu, nr, true, error_code, false); |
298101da AK |
339 | } |
340 | EXPORT_SYMBOL_GPL(kvm_queue_exception_e); | |
341 | ||
ce7ddec4 JR |
342 | void kvm_requeue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code) |
343 | { | |
344 | kvm_multiple_exception(vcpu, nr, true, error_code, true); | |
345 | } | |
346 | EXPORT_SYMBOL_GPL(kvm_requeue_exception_e); | |
347 | ||
0a79b009 AK |
348 | /* |
349 | * Checks if cpl <= required_cpl; if true, return true. Otherwise queue | |
350 | * a #GP and return false. | |
351 | */ | |
352 | bool kvm_require_cpl(struct kvm_vcpu *vcpu, int required_cpl) | |
298101da | 353 | { |
0a79b009 AK |
354 | if (kvm_x86_ops->get_cpl(vcpu) <= required_cpl) |
355 | return true; | |
356 | kvm_queue_exception_e(vcpu, GP_VECTOR, 0); | |
357 | return false; | |
298101da | 358 | } |
0a79b009 | 359 | EXPORT_SYMBOL_GPL(kvm_require_cpl); |
298101da | 360 | |
a03490ed CO |
361 | /* |
362 | * Load the pae pdptrs. Return true is they are all valid. | |
363 | */ | |
364 | int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3) | |
365 | { | |
366 | gfn_t pdpt_gfn = cr3 >> PAGE_SHIFT; | |
367 | unsigned offset = ((cr3 & (PAGE_SIZE-1)) >> 5) << 2; | |
368 | int i; | |
369 | int ret; | |
ad312c7c | 370 | u64 pdpte[ARRAY_SIZE(vcpu->arch.pdptrs)]; |
a03490ed | 371 | |
a03490ed CO |
372 | ret = kvm_read_guest_page(vcpu->kvm, pdpt_gfn, pdpte, |
373 | offset * sizeof(u64), sizeof(pdpte)); | |
374 | if (ret < 0) { | |
375 | ret = 0; | |
376 | goto out; | |
377 | } | |
378 | for (i = 0; i < ARRAY_SIZE(pdpte); ++i) { | |
43a3795a | 379 | if (is_present_gpte(pdpte[i]) && |
20c466b5 | 380 | (pdpte[i] & vcpu->arch.mmu.rsvd_bits_mask[0][2])) { |
a03490ed CO |
381 | ret = 0; |
382 | goto out; | |
383 | } | |
384 | } | |
385 | ret = 1; | |
386 | ||
ad312c7c | 387 | memcpy(vcpu->arch.pdptrs, pdpte, sizeof(vcpu->arch.pdptrs)); |
6de4f3ad AK |
388 | __set_bit(VCPU_EXREG_PDPTR, |
389 | (unsigned long *)&vcpu->arch.regs_avail); | |
390 | __set_bit(VCPU_EXREG_PDPTR, | |
391 | (unsigned long *)&vcpu->arch.regs_dirty); | |
a03490ed | 392 | out: |
a03490ed CO |
393 | |
394 | return ret; | |
395 | } | |
cc4b6871 | 396 | EXPORT_SYMBOL_GPL(load_pdptrs); |
a03490ed | 397 | |
d835dfec AK |
398 | static bool pdptrs_changed(struct kvm_vcpu *vcpu) |
399 | { | |
ad312c7c | 400 | u64 pdpte[ARRAY_SIZE(vcpu->arch.pdptrs)]; |
d835dfec AK |
401 | bool changed = true; |
402 | int r; | |
403 | ||
404 | if (is_long_mode(vcpu) || !is_pae(vcpu)) | |
405 | return false; | |
406 | ||
6de4f3ad AK |
407 | if (!test_bit(VCPU_EXREG_PDPTR, |
408 | (unsigned long *)&vcpu->arch.regs_avail)) | |
409 | return true; | |
410 | ||
ad312c7c | 411 | r = kvm_read_guest(vcpu->kvm, vcpu->arch.cr3 & ~31u, pdpte, sizeof(pdpte)); |
d835dfec AK |
412 | if (r < 0) |
413 | goto out; | |
ad312c7c | 414 | changed = memcmp(pdpte, vcpu->arch.pdptrs, sizeof(pdpte)) != 0; |
d835dfec | 415 | out: |
d835dfec AK |
416 | |
417 | return changed; | |
418 | } | |
419 | ||
0f12244f | 420 | static int __kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) |
a03490ed | 421 | { |
aad82703 SY |
422 | unsigned long old_cr0 = kvm_read_cr0(vcpu); |
423 | unsigned long update_bits = X86_CR0_PG | X86_CR0_WP | | |
424 | X86_CR0_CD | X86_CR0_NW; | |
425 | ||
f9a48e6a AK |
426 | cr0 |= X86_CR0_ET; |
427 | ||
ab344828 | 428 | #ifdef CONFIG_X86_64 |
0f12244f GN |
429 | if (cr0 & 0xffffffff00000000UL) |
430 | return 1; | |
ab344828 GN |
431 | #endif |
432 | ||
433 | cr0 &= ~CR0_RESERVED_BITS; | |
a03490ed | 434 | |
0f12244f GN |
435 | if ((cr0 & X86_CR0_NW) && !(cr0 & X86_CR0_CD)) |
436 | return 1; | |
a03490ed | 437 | |
0f12244f GN |
438 | if ((cr0 & X86_CR0_PG) && !(cr0 & X86_CR0_PE)) |
439 | return 1; | |
a03490ed CO |
440 | |
441 | if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) { | |
442 | #ifdef CONFIG_X86_64 | |
f6801dff | 443 | if ((vcpu->arch.efer & EFER_LME)) { |
a03490ed CO |
444 | int cs_db, cs_l; |
445 | ||
0f12244f GN |
446 | if (!is_pae(vcpu)) |
447 | return 1; | |
a03490ed | 448 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); |
0f12244f GN |
449 | if (cs_l) |
450 | return 1; | |
a03490ed CO |
451 | } else |
452 | #endif | |
0f12244f GN |
453 | if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->arch.cr3)) |
454 | return 1; | |
a03490ed CO |
455 | } |
456 | ||
457 | kvm_x86_ops->set_cr0(vcpu, cr0); | |
a03490ed | 458 | |
aad82703 SY |
459 | if ((cr0 ^ old_cr0) & update_bits) |
460 | kvm_mmu_reset_context(vcpu); | |
0f12244f GN |
461 | return 0; |
462 | } | |
463 | ||
464 | void kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) | |
465 | { | |
466 | if (__kvm_set_cr0(vcpu, cr0)) | |
467 | kvm_inject_gp(vcpu, 0); | |
a03490ed | 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 | { |
f78e9176 | 473 | kvm_set_cr0(vcpu, kvm_read_cr0_bits(vcpu, ~0x0eul) | (msw & 0x0f)); |
a03490ed | 474 | } |
2d3ad1f4 | 475 | EXPORT_SYMBOL_GPL(kvm_lmsw); |
a03490ed | 476 | |
0f12244f | 477 | int __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 | ||
0f12244f GN |
482 | if (cr4 & CR4_RESERVED_BITS) |
483 | return 1; | |
a03490ed CO |
484 | |
485 | if (is_long_mode(vcpu)) { | |
0f12244f GN |
486 | if (!(cr4 & X86_CR4_PAE)) |
487 | return 1; | |
a2edf57f AK |
488 | } else if (is_paging(vcpu) && (cr4 & X86_CR4_PAE) |
489 | && ((cr4 ^ old_cr4) & pdptr_bits) | |
0f12244f GN |
490 | && !load_pdptrs(vcpu, vcpu->arch.cr3)) |
491 | return 1; | |
492 | ||
493 | if (cr4 & X86_CR4_VMXE) | |
494 | return 1; | |
a03490ed | 495 | |
a03490ed | 496 | kvm_x86_ops->set_cr4(vcpu, cr4); |
62ad0755 | 497 | |
aad82703 SY |
498 | if ((cr4 ^ old_cr4) & pdptr_bits) |
499 | kvm_mmu_reset_context(vcpu); | |
0f12244f GN |
500 | |
501 | return 0; | |
502 | } | |
503 | ||
504 | void kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4) | |
505 | { | |
506 | if (__kvm_set_cr4(vcpu, cr4)) | |
507 | kvm_inject_gp(vcpu, 0); | |
a03490ed | 508 | } |
2d3ad1f4 | 509 | EXPORT_SYMBOL_GPL(kvm_set_cr4); |
a03490ed | 510 | |
0f12244f | 511 | static int __kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3) |
a03490ed | 512 | { |
ad312c7c | 513 | if (cr3 == vcpu->arch.cr3 && !pdptrs_changed(vcpu)) { |
0ba73cda | 514 | kvm_mmu_sync_roots(vcpu); |
d835dfec | 515 | kvm_mmu_flush_tlb(vcpu); |
0f12244f | 516 | return 0; |
d835dfec AK |
517 | } |
518 | ||
a03490ed | 519 | if (is_long_mode(vcpu)) { |
0f12244f GN |
520 | if (cr3 & CR3_L_MODE_RESERVED_BITS) |
521 | return 1; | |
a03490ed CO |
522 | } else { |
523 | if (is_pae(vcpu)) { | |
0f12244f GN |
524 | if (cr3 & CR3_PAE_RESERVED_BITS) |
525 | return 1; | |
526 | if (is_paging(vcpu) && !load_pdptrs(vcpu, cr3)) | |
527 | return 1; | |
a03490ed CO |
528 | } |
529 | /* | |
530 | * We don't check reserved bits in nonpae mode, because | |
531 | * this isn't enforced, and VMware depends on this. | |
532 | */ | |
533 | } | |
534 | ||
a03490ed CO |
535 | /* |
536 | * Does the new cr3 value map to physical memory? (Note, we | |
537 | * catch an invalid cr3 even in real-mode, because it would | |
538 | * cause trouble later on when we turn on paging anyway.) | |
539 | * | |
540 | * A real CPU would silently accept an invalid cr3 and would | |
541 | * attempt to use it - with largely undefined (and often hard | |
542 | * to debug) behavior on the guest side. | |
543 | */ | |
544 | if (unlikely(!gfn_to_memslot(vcpu->kvm, cr3 >> PAGE_SHIFT))) | |
0f12244f GN |
545 | return 1; |
546 | vcpu->arch.cr3 = cr3; | |
547 | vcpu->arch.mmu.new_cr3(vcpu); | |
548 | return 0; | |
549 | } | |
550 | ||
551 | void kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3) | |
552 | { | |
553 | if (__kvm_set_cr3(vcpu, cr3)) | |
c1a5d4f9 | 554 | kvm_inject_gp(vcpu, 0); |
a03490ed | 555 | } |
2d3ad1f4 | 556 | EXPORT_SYMBOL_GPL(kvm_set_cr3); |
a03490ed | 557 | |
0f12244f | 558 | int __kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8) |
a03490ed | 559 | { |
0f12244f GN |
560 | if (cr8 & CR8_RESERVED_BITS) |
561 | return 1; | |
a03490ed CO |
562 | if (irqchip_in_kernel(vcpu->kvm)) |
563 | kvm_lapic_set_tpr(vcpu, cr8); | |
564 | else | |
ad312c7c | 565 | vcpu->arch.cr8 = cr8; |
0f12244f GN |
566 | return 0; |
567 | } | |
568 | ||
569 | void kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8) | |
570 | { | |
571 | if (__kvm_set_cr8(vcpu, cr8)) | |
572 | kvm_inject_gp(vcpu, 0); | |
a03490ed | 573 | } |
2d3ad1f4 | 574 | EXPORT_SYMBOL_GPL(kvm_set_cr8); |
a03490ed | 575 | |
2d3ad1f4 | 576 | unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu) |
a03490ed CO |
577 | { |
578 | if (irqchip_in_kernel(vcpu->kvm)) | |
579 | return kvm_lapic_get_cr8(vcpu); | |
580 | else | |
ad312c7c | 581 | return vcpu->arch.cr8; |
a03490ed | 582 | } |
2d3ad1f4 | 583 | EXPORT_SYMBOL_GPL(kvm_get_cr8); |
a03490ed | 584 | |
338dbc97 | 585 | static int __kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val) |
020df079 GN |
586 | { |
587 | switch (dr) { | |
588 | case 0 ... 3: | |
589 | vcpu->arch.db[dr] = val; | |
590 | if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)) | |
591 | vcpu->arch.eff_db[dr] = val; | |
592 | break; | |
593 | case 4: | |
338dbc97 GN |
594 | if (kvm_read_cr4_bits(vcpu, X86_CR4_DE)) |
595 | return 1; /* #UD */ | |
020df079 GN |
596 | /* fall through */ |
597 | case 6: | |
338dbc97 GN |
598 | if (val & 0xffffffff00000000ULL) |
599 | return -1; /* #GP */ | |
020df079 GN |
600 | vcpu->arch.dr6 = (val & DR6_VOLATILE) | DR6_FIXED_1; |
601 | break; | |
602 | case 5: | |
338dbc97 GN |
603 | if (kvm_read_cr4_bits(vcpu, X86_CR4_DE)) |
604 | return 1; /* #UD */ | |
020df079 GN |
605 | /* fall through */ |
606 | default: /* 7 */ | |
338dbc97 GN |
607 | if (val & 0xffffffff00000000ULL) |
608 | return -1; /* #GP */ | |
020df079 GN |
609 | vcpu->arch.dr7 = (val & DR7_VOLATILE) | DR7_FIXED_1; |
610 | if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)) { | |
611 | kvm_x86_ops->set_dr7(vcpu, vcpu->arch.dr7); | |
612 | vcpu->arch.switch_db_regs = (val & DR7_BP_EN_MASK); | |
613 | } | |
614 | break; | |
615 | } | |
616 | ||
617 | return 0; | |
618 | } | |
338dbc97 GN |
619 | |
620 | int kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val) | |
621 | { | |
622 | int res; | |
623 | ||
624 | res = __kvm_set_dr(vcpu, dr, val); | |
625 | if (res > 0) | |
626 | kvm_queue_exception(vcpu, UD_VECTOR); | |
627 | else if (res < 0) | |
628 | kvm_inject_gp(vcpu, 0); | |
629 | ||
630 | return res; | |
631 | } | |
020df079 GN |
632 | EXPORT_SYMBOL_GPL(kvm_set_dr); |
633 | ||
338dbc97 | 634 | static int _kvm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *val) |
020df079 GN |
635 | { |
636 | switch (dr) { | |
637 | case 0 ... 3: | |
638 | *val = vcpu->arch.db[dr]; | |
639 | break; | |
640 | case 4: | |
338dbc97 | 641 | if (kvm_read_cr4_bits(vcpu, X86_CR4_DE)) |
020df079 | 642 | return 1; |
020df079 GN |
643 | /* fall through */ |
644 | case 6: | |
645 | *val = vcpu->arch.dr6; | |
646 | break; | |
647 | case 5: | |
338dbc97 | 648 | if (kvm_read_cr4_bits(vcpu, X86_CR4_DE)) |
020df079 | 649 | return 1; |
020df079 GN |
650 | /* fall through */ |
651 | default: /* 7 */ | |
652 | *val = vcpu->arch.dr7; | |
653 | break; | |
654 | } | |
655 | ||
656 | return 0; | |
657 | } | |
338dbc97 GN |
658 | |
659 | int kvm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *val) | |
660 | { | |
661 | if (_kvm_get_dr(vcpu, dr, val)) { | |
662 | kvm_queue_exception(vcpu, UD_VECTOR); | |
663 | return 1; | |
664 | } | |
665 | return 0; | |
666 | } | |
020df079 GN |
667 | EXPORT_SYMBOL_GPL(kvm_get_dr); |
668 | ||
d8017474 AG |
669 | static inline u32 bit(int bitno) |
670 | { | |
671 | return 1 << (bitno & 31); | |
672 | } | |
673 | ||
043405e1 CO |
674 | /* |
675 | * List of msr numbers which we expose to userspace through KVM_GET_MSRS | |
676 | * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST. | |
677 | * | |
678 | * This list is modified at module load time to reflect the | |
e3267cbb GC |
679 | * capabilities of the host cpu. This capabilities test skips MSRs that are |
680 | * kvm-specific. Those are put in the beginning of the list. | |
043405e1 | 681 | */ |
e3267cbb | 682 | |
11c6bffa | 683 | #define KVM_SAVE_MSRS_BEGIN 7 |
043405e1 | 684 | static u32 msrs_to_save[] = { |
e3267cbb | 685 | MSR_KVM_SYSTEM_TIME, MSR_KVM_WALL_CLOCK, |
11c6bffa | 686 | MSR_KVM_SYSTEM_TIME_NEW, MSR_KVM_WALL_CLOCK_NEW, |
55cd8e5a | 687 | HV_X64_MSR_GUEST_OS_ID, HV_X64_MSR_HYPERCALL, |
10388a07 | 688 | HV_X64_MSR_APIC_ASSIST_PAGE, |
043405e1 CO |
689 | MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP, |
690 | MSR_K6_STAR, | |
691 | #ifdef CONFIG_X86_64 | |
692 | MSR_CSTAR, MSR_KERNEL_GS_BASE, MSR_SYSCALL_MASK, MSR_LSTAR, | |
693 | #endif | |
e3267cbb | 694 | MSR_IA32_TSC, MSR_IA32_PERF_STATUS, MSR_IA32_CR_PAT, MSR_VM_HSAVE_PA |
043405e1 CO |
695 | }; |
696 | ||
697 | static unsigned num_msrs_to_save; | |
698 | ||
699 | static u32 emulated_msrs[] = { | |
700 | MSR_IA32_MISC_ENABLE, | |
701 | }; | |
702 | ||
b69e8cae | 703 | static int set_efer(struct kvm_vcpu *vcpu, u64 efer) |
15c4a640 | 704 | { |
aad82703 SY |
705 | u64 old_efer = vcpu->arch.efer; |
706 | ||
b69e8cae RJ |
707 | if (efer & efer_reserved_bits) |
708 | return 1; | |
15c4a640 CO |
709 | |
710 | if (is_paging(vcpu) | |
b69e8cae RJ |
711 | && (vcpu->arch.efer & EFER_LME) != (efer & EFER_LME)) |
712 | return 1; | |
15c4a640 | 713 | |
1b2fd70c AG |
714 | if (efer & EFER_FFXSR) { |
715 | struct kvm_cpuid_entry2 *feat; | |
716 | ||
717 | feat = kvm_find_cpuid_entry(vcpu, 0x80000001, 0); | |
b69e8cae RJ |
718 | if (!feat || !(feat->edx & bit(X86_FEATURE_FXSR_OPT))) |
719 | return 1; | |
1b2fd70c AG |
720 | } |
721 | ||
d8017474 AG |
722 | if (efer & EFER_SVME) { |
723 | struct kvm_cpuid_entry2 *feat; | |
724 | ||
725 | feat = kvm_find_cpuid_entry(vcpu, 0x80000001, 0); | |
b69e8cae RJ |
726 | if (!feat || !(feat->ecx & bit(X86_FEATURE_SVM))) |
727 | return 1; | |
d8017474 AG |
728 | } |
729 | ||
15c4a640 | 730 | efer &= ~EFER_LMA; |
f6801dff | 731 | efer |= vcpu->arch.efer & EFER_LMA; |
15c4a640 | 732 | |
a3d204e2 SY |
733 | kvm_x86_ops->set_efer(vcpu, efer); |
734 | ||
9645bb56 AK |
735 | vcpu->arch.mmu.base_role.nxe = (efer & EFER_NX) && !tdp_enabled; |
736 | kvm_mmu_reset_context(vcpu); | |
b69e8cae | 737 | |
aad82703 SY |
738 | /* Update reserved bits */ |
739 | if ((efer ^ old_efer) & EFER_NX) | |
740 | kvm_mmu_reset_context(vcpu); | |
741 | ||
b69e8cae | 742 | return 0; |
15c4a640 CO |
743 | } |
744 | ||
f2b4b7dd JR |
745 | void kvm_enable_efer_bits(u64 mask) |
746 | { | |
747 | efer_reserved_bits &= ~mask; | |
748 | } | |
749 | EXPORT_SYMBOL_GPL(kvm_enable_efer_bits); | |
750 | ||
751 | ||
15c4a640 CO |
752 | /* |
753 | * Writes msr value into into the appropriate "register". | |
754 | * Returns 0 on success, non-0 otherwise. | |
755 | * Assumes vcpu_load() was already called. | |
756 | */ | |
757 | int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data) | |
758 | { | |
759 | return kvm_x86_ops->set_msr(vcpu, msr_index, data); | |
760 | } | |
761 | ||
313a3dc7 CO |
762 | /* |
763 | * Adapt set_msr() to msr_io()'s calling convention | |
764 | */ | |
765 | static int do_set_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data) | |
766 | { | |
767 | return kvm_set_msr(vcpu, index, *data); | |
768 | } | |
769 | ||
18068523 GOC |
770 | static void kvm_write_wall_clock(struct kvm *kvm, gpa_t wall_clock) |
771 | { | |
9ed3c444 AK |
772 | int version; |
773 | int r; | |
50d0a0f9 | 774 | struct pvclock_wall_clock wc; |
923de3cf | 775 | struct timespec boot; |
18068523 GOC |
776 | |
777 | if (!wall_clock) | |
778 | return; | |
779 | ||
9ed3c444 AK |
780 | r = kvm_read_guest(kvm, wall_clock, &version, sizeof(version)); |
781 | if (r) | |
782 | return; | |
783 | ||
784 | if (version & 1) | |
785 | ++version; /* first time write, random junk */ | |
786 | ||
787 | ++version; | |
18068523 | 788 | |
18068523 GOC |
789 | kvm_write_guest(kvm, wall_clock, &version, sizeof(version)); |
790 | ||
50d0a0f9 GH |
791 | /* |
792 | * The guest calculates current wall clock time by adding | |
793 | * system time (updated by kvm_write_guest_time below) to the | |
794 | * wall clock specified here. guest system time equals host | |
795 | * system time for us, thus we must fill in host boot time here. | |
796 | */ | |
923de3cf | 797 | getboottime(&boot); |
50d0a0f9 GH |
798 | |
799 | wc.sec = boot.tv_sec; | |
800 | wc.nsec = boot.tv_nsec; | |
801 | wc.version = version; | |
18068523 GOC |
802 | |
803 | kvm_write_guest(kvm, wall_clock, &wc, sizeof(wc)); | |
804 | ||
805 | version++; | |
806 | kvm_write_guest(kvm, wall_clock, &version, sizeof(version)); | |
18068523 GOC |
807 | } |
808 | ||
50d0a0f9 GH |
809 | static uint32_t div_frac(uint32_t dividend, uint32_t divisor) |
810 | { | |
811 | uint32_t quotient, remainder; | |
812 | ||
813 | /* Don't try to replace with do_div(), this one calculates | |
814 | * "(dividend << 32) / divisor" */ | |
815 | __asm__ ( "divl %4" | |
816 | : "=a" (quotient), "=d" (remainder) | |
817 | : "0" (0), "1" (dividend), "r" (divisor) ); | |
818 | return quotient; | |
819 | } | |
820 | ||
821 | static void kvm_set_time_scale(uint32_t tsc_khz, struct pvclock_vcpu_time_info *hv_clock) | |
822 | { | |
823 | uint64_t nsecs = 1000000000LL; | |
824 | int32_t shift = 0; | |
825 | uint64_t tps64; | |
826 | uint32_t tps32; | |
827 | ||
828 | tps64 = tsc_khz * 1000LL; | |
829 | while (tps64 > nsecs*2) { | |
830 | tps64 >>= 1; | |
831 | shift--; | |
832 | } | |
833 | ||
834 | tps32 = (uint32_t)tps64; | |
835 | while (tps32 <= (uint32_t)nsecs) { | |
836 | tps32 <<= 1; | |
837 | shift++; | |
838 | } | |
839 | ||
840 | hv_clock->tsc_shift = shift; | |
841 | hv_clock->tsc_to_system_mul = div_frac(nsecs, tps32); | |
842 | ||
843 | pr_debug("%s: tsc_khz %u, tsc_shift %d, tsc_mul %u\n", | |
80a914dc | 844 | __func__, tsc_khz, hv_clock->tsc_shift, |
50d0a0f9 GH |
845 | hv_clock->tsc_to_system_mul); |
846 | } | |
847 | ||
c8076604 GH |
848 | static DEFINE_PER_CPU(unsigned long, cpu_tsc_khz); |
849 | ||
18068523 GOC |
850 | static void kvm_write_guest_time(struct kvm_vcpu *v) |
851 | { | |
852 | struct timespec ts; | |
853 | unsigned long flags; | |
854 | struct kvm_vcpu_arch *vcpu = &v->arch; | |
855 | void *shared_kaddr; | |
463656c0 | 856 | unsigned long this_tsc_khz; |
18068523 GOC |
857 | |
858 | if ((!vcpu->time_page)) | |
859 | return; | |
860 | ||
463656c0 AK |
861 | this_tsc_khz = get_cpu_var(cpu_tsc_khz); |
862 | if (unlikely(vcpu->hv_clock_tsc_khz != this_tsc_khz)) { | |
863 | kvm_set_time_scale(this_tsc_khz, &vcpu->hv_clock); | |
864 | vcpu->hv_clock_tsc_khz = this_tsc_khz; | |
50d0a0f9 | 865 | } |
463656c0 | 866 | put_cpu_var(cpu_tsc_khz); |
50d0a0f9 | 867 | |
18068523 GOC |
868 | /* Keep irq disabled to prevent changes to the clock */ |
869 | local_irq_save(flags); | |
af24a4e4 | 870 | kvm_get_msr(v, MSR_IA32_TSC, &vcpu->hv_clock.tsc_timestamp); |
18068523 | 871 | ktime_get_ts(&ts); |
923de3cf | 872 | monotonic_to_bootbased(&ts); |
18068523 GOC |
873 | local_irq_restore(flags); |
874 | ||
875 | /* With all the info we got, fill in the values */ | |
876 | ||
877 | vcpu->hv_clock.system_time = ts.tv_nsec + | |
afbcf7ab GC |
878 | (NSEC_PER_SEC * (u64)ts.tv_sec) + v->kvm->arch.kvmclock_offset; |
879 | ||
371bcf64 GC |
880 | vcpu->hv_clock.flags = 0; |
881 | ||
18068523 GOC |
882 | /* |
883 | * The interface expects us to write an even number signaling that the | |
884 | * update is finished. Since the guest won't see the intermediate | |
50d0a0f9 | 885 | * state, we just increase by 2 at the end. |
18068523 | 886 | */ |
50d0a0f9 | 887 | vcpu->hv_clock.version += 2; |
18068523 GOC |
888 | |
889 | shared_kaddr = kmap_atomic(vcpu->time_page, KM_USER0); | |
890 | ||
891 | memcpy(shared_kaddr + vcpu->time_offset, &vcpu->hv_clock, | |
50d0a0f9 | 892 | sizeof(vcpu->hv_clock)); |
18068523 GOC |
893 | |
894 | kunmap_atomic(shared_kaddr, KM_USER0); | |
895 | ||
896 | mark_page_dirty(v->kvm, vcpu->time >> PAGE_SHIFT); | |
897 | } | |
898 | ||
c8076604 GH |
899 | static int kvm_request_guest_time_update(struct kvm_vcpu *v) |
900 | { | |
901 | struct kvm_vcpu_arch *vcpu = &v->arch; | |
902 | ||
903 | if (!vcpu->time_page) | |
904 | return 0; | |
905 | set_bit(KVM_REQ_KVMCLOCK_UPDATE, &v->requests); | |
906 | return 1; | |
907 | } | |
908 | ||
9ba075a6 AK |
909 | static bool msr_mtrr_valid(unsigned msr) |
910 | { | |
911 | switch (msr) { | |
912 | case 0x200 ... 0x200 + 2 * KVM_NR_VAR_MTRR - 1: | |
913 | case MSR_MTRRfix64K_00000: | |
914 | case MSR_MTRRfix16K_80000: | |
915 | case MSR_MTRRfix16K_A0000: | |
916 | case MSR_MTRRfix4K_C0000: | |
917 | case MSR_MTRRfix4K_C8000: | |
918 | case MSR_MTRRfix4K_D0000: | |
919 | case MSR_MTRRfix4K_D8000: | |
920 | case MSR_MTRRfix4K_E0000: | |
921 | case MSR_MTRRfix4K_E8000: | |
922 | case MSR_MTRRfix4K_F0000: | |
923 | case MSR_MTRRfix4K_F8000: | |
924 | case MSR_MTRRdefType: | |
925 | case MSR_IA32_CR_PAT: | |
926 | return true; | |
927 | case 0x2f8: | |
928 | return true; | |
929 | } | |
930 | return false; | |
931 | } | |
932 | ||
d6289b93 MT |
933 | static bool valid_pat_type(unsigned t) |
934 | { | |
935 | return t < 8 && (1 << t) & 0xf3; /* 0, 1, 4, 5, 6, 7 */ | |
936 | } | |
937 | ||
938 | static bool valid_mtrr_type(unsigned t) | |
939 | { | |
940 | return t < 8 && (1 << t) & 0x73; /* 0, 1, 4, 5, 6 */ | |
941 | } | |
942 | ||
943 | static bool mtrr_valid(struct kvm_vcpu *vcpu, u32 msr, u64 data) | |
944 | { | |
945 | int i; | |
946 | ||
947 | if (!msr_mtrr_valid(msr)) | |
948 | return false; | |
949 | ||
950 | if (msr == MSR_IA32_CR_PAT) { | |
951 | for (i = 0; i < 8; i++) | |
952 | if (!valid_pat_type((data >> (i * 8)) & 0xff)) | |
953 | return false; | |
954 | return true; | |
955 | } else if (msr == MSR_MTRRdefType) { | |
956 | if (data & ~0xcff) | |
957 | return false; | |
958 | return valid_mtrr_type(data & 0xff); | |
959 | } else if (msr >= MSR_MTRRfix64K_00000 && msr <= MSR_MTRRfix4K_F8000) { | |
960 | for (i = 0; i < 8 ; i++) | |
961 | if (!valid_mtrr_type((data >> (i * 8)) & 0xff)) | |
962 | return false; | |
963 | return true; | |
964 | } | |
965 | ||
966 | /* variable MTRRs */ | |
967 | return valid_mtrr_type(data & 0xff); | |
968 | } | |
969 | ||
9ba075a6 AK |
970 | static int set_msr_mtrr(struct kvm_vcpu *vcpu, u32 msr, u64 data) |
971 | { | |
0bed3b56 SY |
972 | u64 *p = (u64 *)&vcpu->arch.mtrr_state.fixed_ranges; |
973 | ||
d6289b93 | 974 | if (!mtrr_valid(vcpu, msr, data)) |
9ba075a6 AK |
975 | return 1; |
976 | ||
0bed3b56 SY |
977 | if (msr == MSR_MTRRdefType) { |
978 | vcpu->arch.mtrr_state.def_type = data; | |
979 | vcpu->arch.mtrr_state.enabled = (data & 0xc00) >> 10; | |
980 | } else if (msr == MSR_MTRRfix64K_00000) | |
981 | p[0] = data; | |
982 | else if (msr == MSR_MTRRfix16K_80000 || msr == MSR_MTRRfix16K_A0000) | |
983 | p[1 + msr - MSR_MTRRfix16K_80000] = data; | |
984 | else if (msr >= MSR_MTRRfix4K_C0000 && msr <= MSR_MTRRfix4K_F8000) | |
985 | p[3 + msr - MSR_MTRRfix4K_C0000] = data; | |
986 | else if (msr == MSR_IA32_CR_PAT) | |
987 | vcpu->arch.pat = data; | |
988 | else { /* Variable MTRRs */ | |
989 | int idx, is_mtrr_mask; | |
990 | u64 *pt; | |
991 | ||
992 | idx = (msr - 0x200) / 2; | |
993 | is_mtrr_mask = msr - 0x200 - 2 * idx; | |
994 | if (!is_mtrr_mask) | |
995 | pt = | |
996 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].base_lo; | |
997 | else | |
998 | pt = | |
999 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].mask_lo; | |
1000 | *pt = data; | |
1001 | } | |
1002 | ||
1003 | kvm_mmu_reset_context(vcpu); | |
9ba075a6 AK |
1004 | return 0; |
1005 | } | |
15c4a640 | 1006 | |
890ca9ae | 1007 | static int set_msr_mce(struct kvm_vcpu *vcpu, u32 msr, u64 data) |
15c4a640 | 1008 | { |
890ca9ae HY |
1009 | u64 mcg_cap = vcpu->arch.mcg_cap; |
1010 | unsigned bank_num = mcg_cap & 0xff; | |
1011 | ||
15c4a640 | 1012 | switch (msr) { |
15c4a640 | 1013 | case MSR_IA32_MCG_STATUS: |
890ca9ae | 1014 | vcpu->arch.mcg_status = data; |
15c4a640 | 1015 | break; |
c7ac679c | 1016 | case MSR_IA32_MCG_CTL: |
890ca9ae HY |
1017 | if (!(mcg_cap & MCG_CTL_P)) |
1018 | return 1; | |
1019 | if (data != 0 && data != ~(u64)0) | |
1020 | return -1; | |
1021 | vcpu->arch.mcg_ctl = data; | |
1022 | break; | |
1023 | default: | |
1024 | if (msr >= MSR_IA32_MC0_CTL && | |
1025 | msr < MSR_IA32_MC0_CTL + 4 * bank_num) { | |
1026 | u32 offset = msr - MSR_IA32_MC0_CTL; | |
114be429 AP |
1027 | /* only 0 or all 1s can be written to IA32_MCi_CTL |
1028 | * some Linux kernels though clear bit 10 in bank 4 to | |
1029 | * workaround a BIOS/GART TBL issue on AMD K8s, ignore | |
1030 | * this to avoid an uncatched #GP in the guest | |
1031 | */ | |
890ca9ae | 1032 | if ((offset & 0x3) == 0 && |
114be429 | 1033 | data != 0 && (data | (1 << 10)) != ~(u64)0) |
890ca9ae HY |
1034 | return -1; |
1035 | vcpu->arch.mce_banks[offset] = data; | |
1036 | break; | |
1037 | } | |
1038 | return 1; | |
1039 | } | |
1040 | return 0; | |
1041 | } | |
1042 | ||
ffde22ac ES |
1043 | static int xen_hvm_config(struct kvm_vcpu *vcpu, u64 data) |
1044 | { | |
1045 | struct kvm *kvm = vcpu->kvm; | |
1046 | int lm = is_long_mode(vcpu); | |
1047 | u8 *blob_addr = lm ? (u8 *)(long)kvm->arch.xen_hvm_config.blob_addr_64 | |
1048 | : (u8 *)(long)kvm->arch.xen_hvm_config.blob_addr_32; | |
1049 | u8 blob_size = lm ? kvm->arch.xen_hvm_config.blob_size_64 | |
1050 | : kvm->arch.xen_hvm_config.blob_size_32; | |
1051 | u32 page_num = data & ~PAGE_MASK; | |
1052 | u64 page_addr = data & PAGE_MASK; | |
1053 | u8 *page; | |
1054 | int r; | |
1055 | ||
1056 | r = -E2BIG; | |
1057 | if (page_num >= blob_size) | |
1058 | goto out; | |
1059 | r = -ENOMEM; | |
1060 | page = kzalloc(PAGE_SIZE, GFP_KERNEL); | |
1061 | if (!page) | |
1062 | goto out; | |
1063 | r = -EFAULT; | |
1064 | if (copy_from_user(page, blob_addr + (page_num * PAGE_SIZE), PAGE_SIZE)) | |
1065 | goto out_free; | |
1066 | if (kvm_write_guest(kvm, page_addr, page, PAGE_SIZE)) | |
1067 | goto out_free; | |
1068 | r = 0; | |
1069 | out_free: | |
1070 | kfree(page); | |
1071 | out: | |
1072 | return r; | |
1073 | } | |
1074 | ||
55cd8e5a GN |
1075 | static bool kvm_hv_hypercall_enabled(struct kvm *kvm) |
1076 | { | |
1077 | return kvm->arch.hv_hypercall & HV_X64_MSR_HYPERCALL_ENABLE; | |
1078 | } | |
1079 | ||
1080 | static bool kvm_hv_msr_partition_wide(u32 msr) | |
1081 | { | |
1082 | bool r = false; | |
1083 | switch (msr) { | |
1084 | case HV_X64_MSR_GUEST_OS_ID: | |
1085 | case HV_X64_MSR_HYPERCALL: | |
1086 | r = true; | |
1087 | break; | |
1088 | } | |
1089 | ||
1090 | return r; | |
1091 | } | |
1092 | ||
1093 | static int set_msr_hyperv_pw(struct kvm_vcpu *vcpu, u32 msr, u64 data) | |
1094 | { | |
1095 | struct kvm *kvm = vcpu->kvm; | |
1096 | ||
1097 | switch (msr) { | |
1098 | case HV_X64_MSR_GUEST_OS_ID: | |
1099 | kvm->arch.hv_guest_os_id = data; | |
1100 | /* setting guest os id to zero disables hypercall page */ | |
1101 | if (!kvm->arch.hv_guest_os_id) | |
1102 | kvm->arch.hv_hypercall &= ~HV_X64_MSR_HYPERCALL_ENABLE; | |
1103 | break; | |
1104 | case HV_X64_MSR_HYPERCALL: { | |
1105 | u64 gfn; | |
1106 | unsigned long addr; | |
1107 | u8 instructions[4]; | |
1108 | ||
1109 | /* if guest os id is not set hypercall should remain disabled */ | |
1110 | if (!kvm->arch.hv_guest_os_id) | |
1111 | break; | |
1112 | if (!(data & HV_X64_MSR_HYPERCALL_ENABLE)) { | |
1113 | kvm->arch.hv_hypercall = data; | |
1114 | break; | |
1115 | } | |
1116 | gfn = data >> HV_X64_MSR_HYPERCALL_PAGE_ADDRESS_SHIFT; | |
1117 | addr = gfn_to_hva(kvm, gfn); | |
1118 | if (kvm_is_error_hva(addr)) | |
1119 | return 1; | |
1120 | kvm_x86_ops->patch_hypercall(vcpu, instructions); | |
1121 | ((unsigned char *)instructions)[3] = 0xc3; /* ret */ | |
1122 | if (copy_to_user((void __user *)addr, instructions, 4)) | |
1123 | return 1; | |
1124 | kvm->arch.hv_hypercall = data; | |
1125 | break; | |
1126 | } | |
1127 | default: | |
1128 | pr_unimpl(vcpu, "HYPER-V unimplemented wrmsr: 0x%x " | |
1129 | "data 0x%llx\n", msr, data); | |
1130 | return 1; | |
1131 | } | |
1132 | return 0; | |
1133 | } | |
1134 | ||
1135 | static int set_msr_hyperv(struct kvm_vcpu *vcpu, u32 msr, u64 data) | |
1136 | { | |
10388a07 GN |
1137 | switch (msr) { |
1138 | case HV_X64_MSR_APIC_ASSIST_PAGE: { | |
1139 | unsigned long addr; | |
55cd8e5a | 1140 | |
10388a07 GN |
1141 | if (!(data & HV_X64_MSR_APIC_ASSIST_PAGE_ENABLE)) { |
1142 | vcpu->arch.hv_vapic = data; | |
1143 | break; | |
1144 | } | |
1145 | addr = gfn_to_hva(vcpu->kvm, data >> | |
1146 | HV_X64_MSR_APIC_ASSIST_PAGE_ADDRESS_SHIFT); | |
1147 | if (kvm_is_error_hva(addr)) | |
1148 | return 1; | |
1149 | if (clear_user((void __user *)addr, PAGE_SIZE)) | |
1150 | return 1; | |
1151 | vcpu->arch.hv_vapic = data; | |
1152 | break; | |
1153 | } | |
1154 | case HV_X64_MSR_EOI: | |
1155 | return kvm_hv_vapic_msr_write(vcpu, APIC_EOI, data); | |
1156 | case HV_X64_MSR_ICR: | |
1157 | return kvm_hv_vapic_msr_write(vcpu, APIC_ICR, data); | |
1158 | case HV_X64_MSR_TPR: | |
1159 | return kvm_hv_vapic_msr_write(vcpu, APIC_TASKPRI, data); | |
1160 | default: | |
1161 | pr_unimpl(vcpu, "HYPER-V unimplemented wrmsr: 0x%x " | |
1162 | "data 0x%llx\n", msr, data); | |
1163 | return 1; | |
1164 | } | |
1165 | ||
1166 | return 0; | |
55cd8e5a GN |
1167 | } |
1168 | ||
15c4a640 CO |
1169 | int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data) |
1170 | { | |
1171 | switch (msr) { | |
15c4a640 | 1172 | case MSR_EFER: |
b69e8cae | 1173 | return set_efer(vcpu, data); |
8f1589d9 AP |
1174 | case MSR_K7_HWCR: |
1175 | data &= ~(u64)0x40; /* ignore flush filter disable */ | |
82494028 | 1176 | data &= ~(u64)0x100; /* ignore ignne emulation enable */ |
8f1589d9 AP |
1177 | if (data != 0) { |
1178 | pr_unimpl(vcpu, "unimplemented HWCR wrmsr: 0x%llx\n", | |
1179 | data); | |
1180 | return 1; | |
1181 | } | |
15c4a640 | 1182 | break; |
f7c6d140 AP |
1183 | case MSR_FAM10H_MMIO_CONF_BASE: |
1184 | if (data != 0) { | |
1185 | pr_unimpl(vcpu, "unimplemented MMIO_CONF_BASE wrmsr: " | |
1186 | "0x%llx\n", data); | |
1187 | return 1; | |
1188 | } | |
15c4a640 | 1189 | break; |
c323c0e5 | 1190 | case MSR_AMD64_NB_CFG: |
c7ac679c | 1191 | break; |
b5e2fec0 AG |
1192 | case MSR_IA32_DEBUGCTLMSR: |
1193 | if (!data) { | |
1194 | /* We support the non-activated case already */ | |
1195 | break; | |
1196 | } else if (data & ~(DEBUGCTLMSR_LBR | DEBUGCTLMSR_BTF)) { | |
1197 | /* Values other than LBR and BTF are vendor-specific, | |
1198 | thus reserved and should throw a #GP */ | |
1199 | return 1; | |
1200 | } | |
1201 | pr_unimpl(vcpu, "%s: MSR_IA32_DEBUGCTLMSR 0x%llx, nop\n", | |
1202 | __func__, data); | |
1203 | break; | |
15c4a640 CO |
1204 | case MSR_IA32_UCODE_REV: |
1205 | case MSR_IA32_UCODE_WRITE: | |
61a6bd67 | 1206 | case MSR_VM_HSAVE_PA: |
6098ca93 | 1207 | case MSR_AMD64_PATCH_LOADER: |
15c4a640 | 1208 | break; |
9ba075a6 AK |
1209 | case 0x200 ... 0x2ff: |
1210 | return set_msr_mtrr(vcpu, msr, data); | |
15c4a640 CO |
1211 | case MSR_IA32_APICBASE: |
1212 | kvm_set_apic_base(vcpu, data); | |
1213 | break; | |
0105d1a5 GN |
1214 | case APIC_BASE_MSR ... APIC_BASE_MSR + 0x3ff: |
1215 | return kvm_x2apic_msr_write(vcpu, msr, data); | |
15c4a640 | 1216 | case MSR_IA32_MISC_ENABLE: |
ad312c7c | 1217 | vcpu->arch.ia32_misc_enable_msr = data; |
15c4a640 | 1218 | break; |
11c6bffa | 1219 | case MSR_KVM_WALL_CLOCK_NEW: |
18068523 GOC |
1220 | case MSR_KVM_WALL_CLOCK: |
1221 | vcpu->kvm->arch.wall_clock = data; | |
1222 | kvm_write_wall_clock(vcpu->kvm, data); | |
1223 | break; | |
11c6bffa | 1224 | case MSR_KVM_SYSTEM_TIME_NEW: |
18068523 GOC |
1225 | case MSR_KVM_SYSTEM_TIME: { |
1226 | if (vcpu->arch.time_page) { | |
1227 | kvm_release_page_dirty(vcpu->arch.time_page); | |
1228 | vcpu->arch.time_page = NULL; | |
1229 | } | |
1230 | ||
1231 | vcpu->arch.time = data; | |
1232 | ||
1233 | /* we verify if the enable bit is set... */ | |
1234 | if (!(data & 1)) | |
1235 | break; | |
1236 | ||
1237 | /* ...but clean it before doing the actual write */ | |
1238 | vcpu->arch.time_offset = data & ~(PAGE_MASK | 1); | |
1239 | ||
18068523 GOC |
1240 | vcpu->arch.time_page = |
1241 | gfn_to_page(vcpu->kvm, data >> PAGE_SHIFT); | |
18068523 GOC |
1242 | |
1243 | if (is_error_page(vcpu->arch.time_page)) { | |
1244 | kvm_release_page_clean(vcpu->arch.time_page); | |
1245 | vcpu->arch.time_page = NULL; | |
1246 | } | |
1247 | ||
c8076604 | 1248 | kvm_request_guest_time_update(vcpu); |
18068523 GOC |
1249 | break; |
1250 | } | |
890ca9ae HY |
1251 | case MSR_IA32_MCG_CTL: |
1252 | case MSR_IA32_MCG_STATUS: | |
1253 | case MSR_IA32_MC0_CTL ... MSR_IA32_MC0_CTL + 4 * KVM_MAX_MCE_BANKS - 1: | |
1254 | return set_msr_mce(vcpu, msr, data); | |
71db6023 AP |
1255 | |
1256 | /* Performance counters are not protected by a CPUID bit, | |
1257 | * so we should check all of them in the generic path for the sake of | |
1258 | * cross vendor migration. | |
1259 | * Writing a zero into the event select MSRs disables them, | |
1260 | * which we perfectly emulate ;-). Any other value should be at least | |
1261 | * reported, some guests depend on them. | |
1262 | */ | |
1263 | case MSR_P6_EVNTSEL0: | |
1264 | case MSR_P6_EVNTSEL1: | |
1265 | case MSR_K7_EVNTSEL0: | |
1266 | case MSR_K7_EVNTSEL1: | |
1267 | case MSR_K7_EVNTSEL2: | |
1268 | case MSR_K7_EVNTSEL3: | |
1269 | if (data != 0) | |
1270 | pr_unimpl(vcpu, "unimplemented perfctr wrmsr: " | |
1271 | "0x%x data 0x%llx\n", msr, data); | |
1272 | break; | |
1273 | /* at least RHEL 4 unconditionally writes to the perfctr registers, | |
1274 | * so we ignore writes to make it happy. | |
1275 | */ | |
1276 | case MSR_P6_PERFCTR0: | |
1277 | case MSR_P6_PERFCTR1: | |
1278 | case MSR_K7_PERFCTR0: | |
1279 | case MSR_K7_PERFCTR1: | |
1280 | case MSR_K7_PERFCTR2: | |
1281 | case MSR_K7_PERFCTR3: | |
1282 | pr_unimpl(vcpu, "unimplemented perfctr wrmsr: " | |
1283 | "0x%x data 0x%llx\n", msr, data); | |
1284 | break; | |
55cd8e5a GN |
1285 | case HV_X64_MSR_GUEST_OS_ID ... HV_X64_MSR_SINT15: |
1286 | if (kvm_hv_msr_partition_wide(msr)) { | |
1287 | int r; | |
1288 | mutex_lock(&vcpu->kvm->lock); | |
1289 | r = set_msr_hyperv_pw(vcpu, msr, data); | |
1290 | mutex_unlock(&vcpu->kvm->lock); | |
1291 | return r; | |
1292 | } else | |
1293 | return set_msr_hyperv(vcpu, msr, data); | |
1294 | break; | |
15c4a640 | 1295 | default: |
ffde22ac ES |
1296 | if (msr && (msr == vcpu->kvm->arch.xen_hvm_config.msr)) |
1297 | return xen_hvm_config(vcpu, data); | |
ed85c068 AP |
1298 | if (!ignore_msrs) { |
1299 | pr_unimpl(vcpu, "unhandled wrmsr: 0x%x data %llx\n", | |
1300 | msr, data); | |
1301 | return 1; | |
1302 | } else { | |
1303 | pr_unimpl(vcpu, "ignored wrmsr: 0x%x data %llx\n", | |
1304 | msr, data); | |
1305 | break; | |
1306 | } | |
15c4a640 CO |
1307 | } |
1308 | return 0; | |
1309 | } | |
1310 | EXPORT_SYMBOL_GPL(kvm_set_msr_common); | |
1311 | ||
1312 | ||
1313 | /* | |
1314 | * Reads an msr value (of 'msr_index') into 'pdata'. | |
1315 | * Returns 0 on success, non-0 otherwise. | |
1316 | * Assumes vcpu_load() was already called. | |
1317 | */ | |
1318 | int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata) | |
1319 | { | |
1320 | return kvm_x86_ops->get_msr(vcpu, msr_index, pdata); | |
1321 | } | |
1322 | ||
9ba075a6 AK |
1323 | static int get_msr_mtrr(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
1324 | { | |
0bed3b56 SY |
1325 | u64 *p = (u64 *)&vcpu->arch.mtrr_state.fixed_ranges; |
1326 | ||
9ba075a6 AK |
1327 | if (!msr_mtrr_valid(msr)) |
1328 | return 1; | |
1329 | ||
0bed3b56 SY |
1330 | if (msr == MSR_MTRRdefType) |
1331 | *pdata = vcpu->arch.mtrr_state.def_type + | |
1332 | (vcpu->arch.mtrr_state.enabled << 10); | |
1333 | else if (msr == MSR_MTRRfix64K_00000) | |
1334 | *pdata = p[0]; | |
1335 | else if (msr == MSR_MTRRfix16K_80000 || msr == MSR_MTRRfix16K_A0000) | |
1336 | *pdata = p[1 + msr - MSR_MTRRfix16K_80000]; | |
1337 | else if (msr >= MSR_MTRRfix4K_C0000 && msr <= MSR_MTRRfix4K_F8000) | |
1338 | *pdata = p[3 + msr - MSR_MTRRfix4K_C0000]; | |
1339 | else if (msr == MSR_IA32_CR_PAT) | |
1340 | *pdata = vcpu->arch.pat; | |
1341 | else { /* Variable MTRRs */ | |
1342 | int idx, is_mtrr_mask; | |
1343 | u64 *pt; | |
1344 | ||
1345 | idx = (msr - 0x200) / 2; | |
1346 | is_mtrr_mask = msr - 0x200 - 2 * idx; | |
1347 | if (!is_mtrr_mask) | |
1348 | pt = | |
1349 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].base_lo; | |
1350 | else | |
1351 | pt = | |
1352 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].mask_lo; | |
1353 | *pdata = *pt; | |
1354 | } | |
1355 | ||
9ba075a6 AK |
1356 | return 0; |
1357 | } | |
1358 | ||
890ca9ae | 1359 | static int get_msr_mce(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
15c4a640 CO |
1360 | { |
1361 | u64 data; | |
890ca9ae HY |
1362 | u64 mcg_cap = vcpu->arch.mcg_cap; |
1363 | unsigned bank_num = mcg_cap & 0xff; | |
15c4a640 CO |
1364 | |
1365 | switch (msr) { | |
15c4a640 CO |
1366 | case MSR_IA32_P5_MC_ADDR: |
1367 | case MSR_IA32_P5_MC_TYPE: | |
890ca9ae HY |
1368 | data = 0; |
1369 | break; | |
15c4a640 | 1370 | case MSR_IA32_MCG_CAP: |
890ca9ae HY |
1371 | data = vcpu->arch.mcg_cap; |
1372 | break; | |
c7ac679c | 1373 | case MSR_IA32_MCG_CTL: |
890ca9ae HY |
1374 | if (!(mcg_cap & MCG_CTL_P)) |
1375 | return 1; | |
1376 | data = vcpu->arch.mcg_ctl; | |
1377 | break; | |
1378 | case MSR_IA32_MCG_STATUS: | |
1379 | data = vcpu->arch.mcg_status; | |
1380 | break; | |
1381 | default: | |
1382 | if (msr >= MSR_IA32_MC0_CTL && | |
1383 | msr < MSR_IA32_MC0_CTL + 4 * bank_num) { | |
1384 | u32 offset = msr - MSR_IA32_MC0_CTL; | |
1385 | data = vcpu->arch.mce_banks[offset]; | |
1386 | break; | |
1387 | } | |
1388 | return 1; | |
1389 | } | |
1390 | *pdata = data; | |
1391 | return 0; | |
1392 | } | |
1393 | ||
55cd8e5a GN |
1394 | static int get_msr_hyperv_pw(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
1395 | { | |
1396 | u64 data = 0; | |
1397 | struct kvm *kvm = vcpu->kvm; | |
1398 | ||
1399 | switch (msr) { | |
1400 | case HV_X64_MSR_GUEST_OS_ID: | |
1401 | data = kvm->arch.hv_guest_os_id; | |
1402 | break; | |
1403 | case HV_X64_MSR_HYPERCALL: | |
1404 | data = kvm->arch.hv_hypercall; | |
1405 | break; | |
1406 | default: | |
1407 | pr_unimpl(vcpu, "Hyper-V unhandled rdmsr: 0x%x\n", msr); | |
1408 | return 1; | |
1409 | } | |
1410 | ||
1411 | *pdata = data; | |
1412 | return 0; | |
1413 | } | |
1414 | ||
1415 | static int get_msr_hyperv(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) | |
1416 | { | |
1417 | u64 data = 0; | |
1418 | ||
1419 | switch (msr) { | |
1420 | case HV_X64_MSR_VP_INDEX: { | |
1421 | int r; | |
1422 | struct kvm_vcpu *v; | |
1423 | kvm_for_each_vcpu(r, v, vcpu->kvm) | |
1424 | if (v == vcpu) | |
1425 | data = r; | |
1426 | break; | |
1427 | } | |
10388a07 GN |
1428 | case HV_X64_MSR_EOI: |
1429 | return kvm_hv_vapic_msr_read(vcpu, APIC_EOI, pdata); | |
1430 | case HV_X64_MSR_ICR: | |
1431 | return kvm_hv_vapic_msr_read(vcpu, APIC_ICR, pdata); | |
1432 | case HV_X64_MSR_TPR: | |
1433 | return kvm_hv_vapic_msr_read(vcpu, APIC_TASKPRI, pdata); | |
55cd8e5a GN |
1434 | default: |
1435 | pr_unimpl(vcpu, "Hyper-V unhandled rdmsr: 0x%x\n", msr); | |
1436 | return 1; | |
1437 | } | |
1438 | *pdata = data; | |
1439 | return 0; | |
1440 | } | |
1441 | ||
890ca9ae HY |
1442 | int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
1443 | { | |
1444 | u64 data; | |
1445 | ||
1446 | switch (msr) { | |
890ca9ae | 1447 | case MSR_IA32_PLATFORM_ID: |
15c4a640 | 1448 | case MSR_IA32_UCODE_REV: |
15c4a640 | 1449 | case MSR_IA32_EBL_CR_POWERON: |
b5e2fec0 AG |
1450 | case MSR_IA32_DEBUGCTLMSR: |
1451 | case MSR_IA32_LASTBRANCHFROMIP: | |
1452 | case MSR_IA32_LASTBRANCHTOIP: | |
1453 | case MSR_IA32_LASTINTFROMIP: | |
1454 | case MSR_IA32_LASTINTTOIP: | |
60af2ecd JSR |
1455 | case MSR_K8_SYSCFG: |
1456 | case MSR_K7_HWCR: | |
61a6bd67 | 1457 | case MSR_VM_HSAVE_PA: |
1f3ee616 AS |
1458 | case MSR_P6_PERFCTR0: |
1459 | case MSR_P6_PERFCTR1: | |
7fe29e0f AS |
1460 | case MSR_P6_EVNTSEL0: |
1461 | case MSR_P6_EVNTSEL1: | |
9e699624 | 1462 | case MSR_K7_EVNTSEL0: |
1f3ee616 | 1463 | case MSR_K7_PERFCTR0: |
1fdbd48c | 1464 | case MSR_K8_INT_PENDING_MSG: |
c323c0e5 | 1465 | case MSR_AMD64_NB_CFG: |
f7c6d140 | 1466 | case MSR_FAM10H_MMIO_CONF_BASE: |
15c4a640 CO |
1467 | data = 0; |
1468 | break; | |
9ba075a6 AK |
1469 | case MSR_MTRRcap: |
1470 | data = 0x500 | KVM_NR_VAR_MTRR; | |
1471 | break; | |
1472 | case 0x200 ... 0x2ff: | |
1473 | return get_msr_mtrr(vcpu, msr, pdata); | |
15c4a640 CO |
1474 | case 0xcd: /* fsb frequency */ |
1475 | data = 3; | |
1476 | break; | |
1477 | case MSR_IA32_APICBASE: | |
1478 | data = kvm_get_apic_base(vcpu); | |
1479 | break; | |
0105d1a5 GN |
1480 | case APIC_BASE_MSR ... APIC_BASE_MSR + 0x3ff: |
1481 | return kvm_x2apic_msr_read(vcpu, msr, pdata); | |
1482 | break; | |
15c4a640 | 1483 | case MSR_IA32_MISC_ENABLE: |
ad312c7c | 1484 | data = vcpu->arch.ia32_misc_enable_msr; |
15c4a640 | 1485 | break; |
847f0ad8 AG |
1486 | case MSR_IA32_PERF_STATUS: |
1487 | /* TSC increment by tick */ | |
1488 | data = 1000ULL; | |
1489 | /* CPU multiplier */ | |
1490 | data |= (((uint64_t)4ULL) << 40); | |
1491 | break; | |
15c4a640 | 1492 | case MSR_EFER: |
f6801dff | 1493 | data = vcpu->arch.efer; |
15c4a640 | 1494 | break; |
18068523 | 1495 | case MSR_KVM_WALL_CLOCK: |
11c6bffa | 1496 | case MSR_KVM_WALL_CLOCK_NEW: |
18068523 GOC |
1497 | data = vcpu->kvm->arch.wall_clock; |
1498 | break; | |
1499 | case MSR_KVM_SYSTEM_TIME: | |
11c6bffa | 1500 | case MSR_KVM_SYSTEM_TIME_NEW: |
18068523 GOC |
1501 | data = vcpu->arch.time; |
1502 | break; | |
890ca9ae HY |
1503 | case MSR_IA32_P5_MC_ADDR: |
1504 | case MSR_IA32_P5_MC_TYPE: | |
1505 | case MSR_IA32_MCG_CAP: | |
1506 | case MSR_IA32_MCG_CTL: | |
1507 | case MSR_IA32_MCG_STATUS: | |
1508 | case MSR_IA32_MC0_CTL ... MSR_IA32_MC0_CTL + 4 * KVM_MAX_MCE_BANKS - 1: | |
1509 | return get_msr_mce(vcpu, msr, pdata); | |
55cd8e5a GN |
1510 | case HV_X64_MSR_GUEST_OS_ID ... HV_X64_MSR_SINT15: |
1511 | if (kvm_hv_msr_partition_wide(msr)) { | |
1512 | int r; | |
1513 | mutex_lock(&vcpu->kvm->lock); | |
1514 | r = get_msr_hyperv_pw(vcpu, msr, pdata); | |
1515 | mutex_unlock(&vcpu->kvm->lock); | |
1516 | return r; | |
1517 | } else | |
1518 | return get_msr_hyperv(vcpu, msr, pdata); | |
1519 | break; | |
15c4a640 | 1520 | default: |
ed85c068 AP |
1521 | if (!ignore_msrs) { |
1522 | pr_unimpl(vcpu, "unhandled rdmsr: 0x%x\n", msr); | |
1523 | return 1; | |
1524 | } else { | |
1525 | pr_unimpl(vcpu, "ignored rdmsr: 0x%x\n", msr); | |
1526 | data = 0; | |
1527 | } | |
1528 | break; | |
15c4a640 CO |
1529 | } |
1530 | *pdata = data; | |
1531 | return 0; | |
1532 | } | |
1533 | EXPORT_SYMBOL_GPL(kvm_get_msr_common); | |
1534 | ||
313a3dc7 CO |
1535 | /* |
1536 | * Read or write a bunch of msrs. All parameters are kernel addresses. | |
1537 | * | |
1538 | * @return number of msrs set successfully. | |
1539 | */ | |
1540 | static int __msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs *msrs, | |
1541 | struct kvm_msr_entry *entries, | |
1542 | int (*do_msr)(struct kvm_vcpu *vcpu, | |
1543 | unsigned index, u64 *data)) | |
1544 | { | |
f656ce01 | 1545 | int i, idx; |
313a3dc7 | 1546 | |
f656ce01 | 1547 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
313a3dc7 CO |
1548 | for (i = 0; i < msrs->nmsrs; ++i) |
1549 | if (do_msr(vcpu, entries[i].index, &entries[i].data)) | |
1550 | break; | |
f656ce01 | 1551 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
313a3dc7 | 1552 | |
313a3dc7 CO |
1553 | return i; |
1554 | } | |
1555 | ||
1556 | /* | |
1557 | * Read or write a bunch of msrs. Parameters are user addresses. | |
1558 | * | |
1559 | * @return number of msrs set successfully. | |
1560 | */ | |
1561 | static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs, | |
1562 | int (*do_msr)(struct kvm_vcpu *vcpu, | |
1563 | unsigned index, u64 *data), | |
1564 | int writeback) | |
1565 | { | |
1566 | struct kvm_msrs msrs; | |
1567 | struct kvm_msr_entry *entries; | |
1568 | int r, n; | |
1569 | unsigned size; | |
1570 | ||
1571 | r = -EFAULT; | |
1572 | if (copy_from_user(&msrs, user_msrs, sizeof msrs)) | |
1573 | goto out; | |
1574 | ||
1575 | r = -E2BIG; | |
1576 | if (msrs.nmsrs >= MAX_IO_MSRS) | |
1577 | goto out; | |
1578 | ||
1579 | r = -ENOMEM; | |
1580 | size = sizeof(struct kvm_msr_entry) * msrs.nmsrs; | |
7a73c028 | 1581 | entries = kmalloc(size, GFP_KERNEL); |
313a3dc7 CO |
1582 | if (!entries) |
1583 | goto out; | |
1584 | ||
1585 | r = -EFAULT; | |
1586 | if (copy_from_user(entries, user_msrs->entries, size)) | |
1587 | goto out_free; | |
1588 | ||
1589 | r = n = __msr_io(vcpu, &msrs, entries, do_msr); | |
1590 | if (r < 0) | |
1591 | goto out_free; | |
1592 | ||
1593 | r = -EFAULT; | |
1594 | if (writeback && copy_to_user(user_msrs->entries, entries, size)) | |
1595 | goto out_free; | |
1596 | ||
1597 | r = n; | |
1598 | ||
1599 | out_free: | |
7a73c028 | 1600 | kfree(entries); |
313a3dc7 CO |
1601 | out: |
1602 | return r; | |
1603 | } | |
1604 | ||
018d00d2 ZX |
1605 | int kvm_dev_ioctl_check_extension(long ext) |
1606 | { | |
1607 | int r; | |
1608 | ||
1609 | switch (ext) { | |
1610 | case KVM_CAP_IRQCHIP: | |
1611 | case KVM_CAP_HLT: | |
1612 | case KVM_CAP_MMU_SHADOW_CACHE_CONTROL: | |
018d00d2 | 1613 | case KVM_CAP_SET_TSS_ADDR: |
07716717 | 1614 | case KVM_CAP_EXT_CPUID: |
c8076604 | 1615 | case KVM_CAP_CLOCKSOURCE: |
7837699f | 1616 | case KVM_CAP_PIT: |
a28e4f5a | 1617 | case KVM_CAP_NOP_IO_DELAY: |
62d9f0db | 1618 | case KVM_CAP_MP_STATE: |
ed848624 | 1619 | case KVM_CAP_SYNC_MMU: |
52d939a0 | 1620 | case KVM_CAP_REINJECT_CONTROL: |
4925663a | 1621 | case KVM_CAP_IRQ_INJECT_STATUS: |
e56d532f | 1622 | case KVM_CAP_ASSIGN_DEV_IRQ: |
721eecbf | 1623 | case KVM_CAP_IRQFD: |
d34e6b17 | 1624 | case KVM_CAP_IOEVENTFD: |
c5ff41ce | 1625 | case KVM_CAP_PIT2: |
e9f42757 | 1626 | case KVM_CAP_PIT_STATE2: |
b927a3ce | 1627 | case KVM_CAP_SET_IDENTITY_MAP_ADDR: |
ffde22ac | 1628 | case KVM_CAP_XEN_HVM: |
afbcf7ab | 1629 | case KVM_CAP_ADJUST_CLOCK: |
3cfc3092 | 1630 | case KVM_CAP_VCPU_EVENTS: |
55cd8e5a | 1631 | case KVM_CAP_HYPERV: |
10388a07 | 1632 | case KVM_CAP_HYPERV_VAPIC: |
c25bc163 | 1633 | case KVM_CAP_HYPERV_SPIN: |
ab9f4ecb | 1634 | case KVM_CAP_PCI_SEGMENT: |
a1efbe77 | 1635 | case KVM_CAP_DEBUGREGS: |
d2be1651 | 1636 | case KVM_CAP_X86_ROBUST_SINGLESTEP: |
018d00d2 ZX |
1637 | r = 1; |
1638 | break; | |
542472b5 LV |
1639 | case KVM_CAP_COALESCED_MMIO: |
1640 | r = KVM_COALESCED_MMIO_PAGE_OFFSET; | |
1641 | break; | |
774ead3a AK |
1642 | case KVM_CAP_VAPIC: |
1643 | r = !kvm_x86_ops->cpu_has_accelerated_tpr(); | |
1644 | break; | |
f725230a AK |
1645 | case KVM_CAP_NR_VCPUS: |
1646 | r = KVM_MAX_VCPUS; | |
1647 | break; | |
a988b910 AK |
1648 | case KVM_CAP_NR_MEMSLOTS: |
1649 | r = KVM_MEMORY_SLOTS; | |
1650 | break; | |
a68a6a72 MT |
1651 | case KVM_CAP_PV_MMU: /* obsolete */ |
1652 | r = 0; | |
2f333bcb | 1653 | break; |
62c476c7 | 1654 | case KVM_CAP_IOMMU: |
19de40a8 | 1655 | r = iommu_found(); |
62c476c7 | 1656 | break; |
890ca9ae HY |
1657 | case KVM_CAP_MCE: |
1658 | r = KVM_MAX_MCE_BANKS; | |
1659 | break; | |
018d00d2 ZX |
1660 | default: |
1661 | r = 0; | |
1662 | break; | |
1663 | } | |
1664 | return r; | |
1665 | ||
1666 | } | |
1667 | ||
043405e1 CO |
1668 | long kvm_arch_dev_ioctl(struct file *filp, |
1669 | unsigned int ioctl, unsigned long arg) | |
1670 | { | |
1671 | void __user *argp = (void __user *)arg; | |
1672 | long r; | |
1673 | ||
1674 | switch (ioctl) { | |
1675 | case KVM_GET_MSR_INDEX_LIST: { | |
1676 | struct kvm_msr_list __user *user_msr_list = argp; | |
1677 | struct kvm_msr_list msr_list; | |
1678 | unsigned n; | |
1679 | ||
1680 | r = -EFAULT; | |
1681 | if (copy_from_user(&msr_list, user_msr_list, sizeof msr_list)) | |
1682 | goto out; | |
1683 | n = msr_list.nmsrs; | |
1684 | msr_list.nmsrs = num_msrs_to_save + ARRAY_SIZE(emulated_msrs); | |
1685 | if (copy_to_user(user_msr_list, &msr_list, sizeof msr_list)) | |
1686 | goto out; | |
1687 | r = -E2BIG; | |
e125e7b6 | 1688 | if (n < msr_list.nmsrs) |
043405e1 CO |
1689 | goto out; |
1690 | r = -EFAULT; | |
1691 | if (copy_to_user(user_msr_list->indices, &msrs_to_save, | |
1692 | num_msrs_to_save * sizeof(u32))) | |
1693 | goto out; | |
e125e7b6 | 1694 | if (copy_to_user(user_msr_list->indices + num_msrs_to_save, |
043405e1 CO |
1695 | &emulated_msrs, |
1696 | ARRAY_SIZE(emulated_msrs) * sizeof(u32))) | |
1697 | goto out; | |
1698 | r = 0; | |
1699 | break; | |
1700 | } | |
674eea0f AK |
1701 | case KVM_GET_SUPPORTED_CPUID: { |
1702 | struct kvm_cpuid2 __user *cpuid_arg = argp; | |
1703 | struct kvm_cpuid2 cpuid; | |
1704 | ||
1705 | r = -EFAULT; | |
1706 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
1707 | goto out; | |
1708 | r = kvm_dev_ioctl_get_supported_cpuid(&cpuid, | |
19355475 | 1709 | cpuid_arg->entries); |
674eea0f AK |
1710 | if (r) |
1711 | goto out; | |
1712 | ||
1713 | r = -EFAULT; | |
1714 | if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid)) | |
1715 | goto out; | |
1716 | r = 0; | |
1717 | break; | |
1718 | } | |
890ca9ae HY |
1719 | case KVM_X86_GET_MCE_CAP_SUPPORTED: { |
1720 | u64 mce_cap; | |
1721 | ||
1722 | mce_cap = KVM_MCE_CAP_SUPPORTED; | |
1723 | r = -EFAULT; | |
1724 | if (copy_to_user(argp, &mce_cap, sizeof mce_cap)) | |
1725 | goto out; | |
1726 | r = 0; | |
1727 | break; | |
1728 | } | |
043405e1 CO |
1729 | default: |
1730 | r = -EINVAL; | |
1731 | } | |
1732 | out: | |
1733 | return r; | |
1734 | } | |
1735 | ||
313a3dc7 CO |
1736 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
1737 | { | |
1738 | kvm_x86_ops->vcpu_load(vcpu, cpu); | |
6b7d7e76 ZA |
1739 | if (unlikely(per_cpu(cpu_tsc_khz, cpu) == 0)) { |
1740 | unsigned long khz = cpufreq_quick_get(cpu); | |
1741 | if (!khz) | |
1742 | khz = tsc_khz; | |
1743 | per_cpu(cpu_tsc_khz, cpu) = khz; | |
1744 | } | |
c8076604 | 1745 | kvm_request_guest_time_update(vcpu); |
313a3dc7 CO |
1746 | } |
1747 | ||
1748 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
1749 | { | |
02daab21 | 1750 | kvm_x86_ops->vcpu_put(vcpu); |
1c11e713 | 1751 | kvm_put_guest_fpu(vcpu); |
313a3dc7 CO |
1752 | } |
1753 | ||
07716717 | 1754 | static int is_efer_nx(void) |
313a3dc7 | 1755 | { |
e286e86e | 1756 | unsigned long long efer = 0; |
313a3dc7 | 1757 | |
e286e86e | 1758 | rdmsrl_safe(MSR_EFER, &efer); |
07716717 DK |
1759 | return efer & EFER_NX; |
1760 | } | |
1761 | ||
1762 | static void cpuid_fix_nx_cap(struct kvm_vcpu *vcpu) | |
1763 | { | |
1764 | int i; | |
1765 | struct kvm_cpuid_entry2 *e, *entry; | |
1766 | ||
313a3dc7 | 1767 | entry = NULL; |
ad312c7c ZX |
1768 | for (i = 0; i < vcpu->arch.cpuid_nent; ++i) { |
1769 | e = &vcpu->arch.cpuid_entries[i]; | |
313a3dc7 CO |
1770 | if (e->function == 0x80000001) { |
1771 | entry = e; | |
1772 | break; | |
1773 | } | |
1774 | } | |
07716717 | 1775 | if (entry && (entry->edx & (1 << 20)) && !is_efer_nx()) { |
313a3dc7 CO |
1776 | entry->edx &= ~(1 << 20); |
1777 | printk(KERN_INFO "kvm: guest NX capability removed\n"); | |
1778 | } | |
1779 | } | |
1780 | ||
07716717 | 1781 | /* when an old userspace process fills a new kernel module */ |
313a3dc7 CO |
1782 | static int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu *vcpu, |
1783 | struct kvm_cpuid *cpuid, | |
1784 | struct kvm_cpuid_entry __user *entries) | |
07716717 DK |
1785 | { |
1786 | int r, i; | |
1787 | struct kvm_cpuid_entry *cpuid_entries; | |
1788 | ||
1789 | r = -E2BIG; | |
1790 | if (cpuid->nent > KVM_MAX_CPUID_ENTRIES) | |
1791 | goto out; | |
1792 | r = -ENOMEM; | |
1793 | cpuid_entries = vmalloc(sizeof(struct kvm_cpuid_entry) * cpuid->nent); | |
1794 | if (!cpuid_entries) | |
1795 | goto out; | |
1796 | r = -EFAULT; | |
1797 | if (copy_from_user(cpuid_entries, entries, | |
1798 | cpuid->nent * sizeof(struct kvm_cpuid_entry))) | |
1799 | goto out_free; | |
1800 | for (i = 0; i < cpuid->nent; i++) { | |
ad312c7c ZX |
1801 | vcpu->arch.cpuid_entries[i].function = cpuid_entries[i].function; |
1802 | vcpu->arch.cpuid_entries[i].eax = cpuid_entries[i].eax; | |
1803 | vcpu->arch.cpuid_entries[i].ebx = cpuid_entries[i].ebx; | |
1804 | vcpu->arch.cpuid_entries[i].ecx = cpuid_entries[i].ecx; | |
1805 | vcpu->arch.cpuid_entries[i].edx = cpuid_entries[i].edx; | |
1806 | vcpu->arch.cpuid_entries[i].index = 0; | |
1807 | vcpu->arch.cpuid_entries[i].flags = 0; | |
1808 | vcpu->arch.cpuid_entries[i].padding[0] = 0; | |
1809 | vcpu->arch.cpuid_entries[i].padding[1] = 0; | |
1810 | vcpu->arch.cpuid_entries[i].padding[2] = 0; | |
1811 | } | |
1812 | vcpu->arch.cpuid_nent = cpuid->nent; | |
07716717 DK |
1813 | cpuid_fix_nx_cap(vcpu); |
1814 | r = 0; | |
fc61b800 | 1815 | kvm_apic_set_version(vcpu); |
0e851880 | 1816 | kvm_x86_ops->cpuid_update(vcpu); |
07716717 DK |
1817 | |
1818 | out_free: | |
1819 | vfree(cpuid_entries); | |
1820 | out: | |
1821 | return r; | |
1822 | } | |
1823 | ||
1824 | static int kvm_vcpu_ioctl_set_cpuid2(struct kvm_vcpu *vcpu, | |
19355475 AS |
1825 | struct kvm_cpuid2 *cpuid, |
1826 | struct kvm_cpuid_entry2 __user *entries) | |
313a3dc7 CO |
1827 | { |
1828 | int r; | |
1829 | ||
1830 | r = -E2BIG; | |
1831 | if (cpuid->nent > KVM_MAX_CPUID_ENTRIES) | |
1832 | goto out; | |
1833 | r = -EFAULT; | |
ad312c7c | 1834 | if (copy_from_user(&vcpu->arch.cpuid_entries, entries, |
07716717 | 1835 | cpuid->nent * sizeof(struct kvm_cpuid_entry2))) |
313a3dc7 | 1836 | goto out; |
ad312c7c | 1837 | vcpu->arch.cpuid_nent = cpuid->nent; |
fc61b800 | 1838 | kvm_apic_set_version(vcpu); |
0e851880 | 1839 | kvm_x86_ops->cpuid_update(vcpu); |
313a3dc7 CO |
1840 | return 0; |
1841 | ||
1842 | out: | |
1843 | return r; | |
1844 | } | |
1845 | ||
07716717 | 1846 | static int kvm_vcpu_ioctl_get_cpuid2(struct kvm_vcpu *vcpu, |
19355475 AS |
1847 | struct kvm_cpuid2 *cpuid, |
1848 | struct kvm_cpuid_entry2 __user *entries) | |
07716717 DK |
1849 | { |
1850 | int r; | |
1851 | ||
1852 | r = -E2BIG; | |
ad312c7c | 1853 | if (cpuid->nent < vcpu->arch.cpuid_nent) |
07716717 DK |
1854 | goto out; |
1855 | r = -EFAULT; | |
ad312c7c | 1856 | if (copy_to_user(entries, &vcpu->arch.cpuid_entries, |
19355475 | 1857 | vcpu->arch.cpuid_nent * sizeof(struct kvm_cpuid_entry2))) |
07716717 DK |
1858 | goto out; |
1859 | return 0; | |
1860 | ||
1861 | out: | |
ad312c7c | 1862 | cpuid->nent = vcpu->arch.cpuid_nent; |
07716717 DK |
1863 | return r; |
1864 | } | |
1865 | ||
07716717 | 1866 | static void do_cpuid_1_ent(struct kvm_cpuid_entry2 *entry, u32 function, |
19355475 | 1867 | u32 index) |
07716717 DK |
1868 | { |
1869 | entry->function = function; | |
1870 | entry->index = index; | |
1871 | cpuid_count(entry->function, entry->index, | |
19355475 | 1872 | &entry->eax, &entry->ebx, &entry->ecx, &entry->edx); |
07716717 DK |
1873 | entry->flags = 0; |
1874 | } | |
1875 | ||
7faa4ee1 AK |
1876 | #define F(x) bit(X86_FEATURE_##x) |
1877 | ||
07716717 DK |
1878 | static void do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function, |
1879 | u32 index, int *nent, int maxnent) | |
1880 | { | |
7faa4ee1 | 1881 | unsigned f_nx = is_efer_nx() ? F(NX) : 0; |
07716717 | 1882 | #ifdef CONFIG_X86_64 |
17cc3935 SY |
1883 | unsigned f_gbpages = (kvm_x86_ops->get_lpage_level() == PT_PDPE_LEVEL) |
1884 | ? F(GBPAGES) : 0; | |
7faa4ee1 AK |
1885 | unsigned f_lm = F(LM); |
1886 | #else | |
17cc3935 | 1887 | unsigned f_gbpages = 0; |
7faa4ee1 | 1888 | unsigned f_lm = 0; |
07716717 | 1889 | #endif |
4e47c7a6 | 1890 | unsigned f_rdtscp = kvm_x86_ops->rdtscp_supported() ? F(RDTSCP) : 0; |
7faa4ee1 AK |
1891 | |
1892 | /* cpuid 1.edx */ | |
1893 | const u32 kvm_supported_word0_x86_features = | |
1894 | F(FPU) | F(VME) | F(DE) | F(PSE) | | |
1895 | F(TSC) | F(MSR) | F(PAE) | F(MCE) | | |
1896 | F(CX8) | F(APIC) | 0 /* Reserved */ | F(SEP) | | |
1897 | F(MTRR) | F(PGE) | F(MCA) | F(CMOV) | | |
1898 | F(PAT) | F(PSE36) | 0 /* PSN */ | F(CLFLSH) | | |
1899 | 0 /* Reserved, DS, ACPI */ | F(MMX) | | |
1900 | F(FXSR) | F(XMM) | F(XMM2) | F(SELFSNOOP) | | |
1901 | 0 /* HTT, TM, Reserved, PBE */; | |
1902 | /* cpuid 0x80000001.edx */ | |
1903 | const u32 kvm_supported_word1_x86_features = | |
1904 | F(FPU) | F(VME) | F(DE) | F(PSE) | | |
1905 | F(TSC) | F(MSR) | F(PAE) | F(MCE) | | |
1906 | F(CX8) | F(APIC) | 0 /* Reserved */ | F(SYSCALL) | | |
1907 | F(MTRR) | F(PGE) | F(MCA) | F(CMOV) | | |
1908 | F(PAT) | F(PSE36) | 0 /* Reserved */ | | |
1909 | f_nx | 0 /* Reserved */ | F(MMXEXT) | F(MMX) | | |
4e47c7a6 | 1910 | F(FXSR) | F(FXSR_OPT) | f_gbpages | f_rdtscp | |
7faa4ee1 AK |
1911 | 0 /* Reserved */ | f_lm | F(3DNOWEXT) | F(3DNOW); |
1912 | /* cpuid 1.ecx */ | |
1913 | const u32 kvm_supported_word4_x86_features = | |
d149c731 AK |
1914 | F(XMM3) | 0 /* Reserved, DTES64, MONITOR */ | |
1915 | 0 /* DS-CPL, VMX, SMX, EST */ | | |
1916 | 0 /* TM2 */ | F(SSSE3) | 0 /* CNXT-ID */ | 0 /* Reserved */ | | |
1917 | 0 /* Reserved */ | F(CX16) | 0 /* xTPR Update, PDCM */ | | |
1918 | 0 /* Reserved, DCA */ | F(XMM4_1) | | |
0105d1a5 | 1919 | F(XMM4_2) | F(X2APIC) | F(MOVBE) | F(POPCNT) | |
d149c731 | 1920 | 0 /* Reserved, XSAVE, OSXSAVE */; |
7faa4ee1 | 1921 | /* cpuid 0x80000001.ecx */ |
07716717 | 1922 | const u32 kvm_supported_word6_x86_features = |
7faa4ee1 AK |
1923 | F(LAHF_LM) | F(CMP_LEGACY) | F(SVM) | 0 /* ExtApicSpace */ | |
1924 | F(CR8_LEGACY) | F(ABM) | F(SSE4A) | F(MISALIGNSSE) | | |
1925 | F(3DNOWPREFETCH) | 0 /* OSVW */ | 0 /* IBS */ | F(SSE5) | | |
1926 | 0 /* SKINIT */ | 0 /* WDT */; | |
07716717 | 1927 | |
19355475 | 1928 | /* all calls to cpuid_count() should be made on the same cpu */ |
07716717 DK |
1929 | get_cpu(); |
1930 | do_cpuid_1_ent(entry, function, index); | |
1931 | ++*nent; | |
1932 | ||
1933 | switch (function) { | |
1934 | case 0: | |
1935 | entry->eax = min(entry->eax, (u32)0xb); | |
1936 | break; | |
1937 | case 1: | |
1938 | entry->edx &= kvm_supported_word0_x86_features; | |
7faa4ee1 | 1939 | entry->ecx &= kvm_supported_word4_x86_features; |
0d1de2d9 GN |
1940 | /* we support x2apic emulation even if host does not support |
1941 | * it since we emulate x2apic in software */ | |
1942 | entry->ecx |= F(X2APIC); | |
07716717 DK |
1943 | break; |
1944 | /* function 2 entries are STATEFUL. That is, repeated cpuid commands | |
1945 | * may return different values. This forces us to get_cpu() before | |
1946 | * issuing the first command, and also to emulate this annoying behavior | |
1947 | * in kvm_emulate_cpuid() using KVM_CPUID_FLAG_STATE_READ_NEXT */ | |
1948 | case 2: { | |
1949 | int t, times = entry->eax & 0xff; | |
1950 | ||
1951 | entry->flags |= KVM_CPUID_FLAG_STATEFUL_FUNC; | |
0fdf8e59 | 1952 | entry->flags |= KVM_CPUID_FLAG_STATE_READ_NEXT; |
07716717 DK |
1953 | for (t = 1; t < times && *nent < maxnent; ++t) { |
1954 | do_cpuid_1_ent(&entry[t], function, 0); | |
1955 | entry[t].flags |= KVM_CPUID_FLAG_STATEFUL_FUNC; | |
1956 | ++*nent; | |
1957 | } | |
1958 | break; | |
1959 | } | |
1960 | /* function 4 and 0xb have additional index. */ | |
1961 | case 4: { | |
14af3f3c | 1962 | int i, cache_type; |
07716717 DK |
1963 | |
1964 | entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX; | |
1965 | /* read more entries until cache_type is zero */ | |
14af3f3c HH |
1966 | for (i = 1; *nent < maxnent; ++i) { |
1967 | cache_type = entry[i - 1].eax & 0x1f; | |
07716717 DK |
1968 | if (!cache_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 0xb: { | |
14af3f3c | 1978 | int i, level_type; |
07716717 DK |
1979 | |
1980 | entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX; | |
1981 | /* read more entries until level_type is zero */ | |
14af3f3c | 1982 | for (i = 1; *nent < maxnent; ++i) { |
0853d2c1 | 1983 | level_type = entry[i - 1].ecx & 0xff00; |
07716717 DK |
1984 | if (!level_type) |
1985 | break; | |
14af3f3c HH |
1986 | do_cpuid_1_ent(&entry[i], function, i); |
1987 | entry[i].flags |= | |
07716717 DK |
1988 | KVM_CPUID_FLAG_SIGNIFCANT_INDEX; |
1989 | ++*nent; | |
1990 | } | |
1991 | break; | |
1992 | } | |
84478c82 GC |
1993 | case KVM_CPUID_SIGNATURE: { |
1994 | char signature[12] = "KVMKVMKVM\0\0"; | |
1995 | u32 *sigptr = (u32 *)signature; | |
1996 | entry->eax = 0; | |
1997 | entry->ebx = sigptr[0]; | |
1998 | entry->ecx = sigptr[1]; | |
1999 | entry->edx = sigptr[2]; | |
2000 | break; | |
2001 | } | |
2002 | case KVM_CPUID_FEATURES: | |
2003 | entry->eax = (1 << KVM_FEATURE_CLOCKSOURCE) | | |
2004 | (1 << KVM_FEATURE_NOP_IO_DELAY) | | |
371bcf64 GC |
2005 | (1 << KVM_FEATURE_CLOCKSOURCE2) | |
2006 | (1 << KVM_FEATURE_CLOCKSOURCE_STABLE_BIT); | |
84478c82 GC |
2007 | entry->ebx = 0; |
2008 | entry->ecx = 0; | |
2009 | entry->edx = 0; | |
2010 | break; | |
07716717 DK |
2011 | case 0x80000000: |
2012 | entry->eax = min(entry->eax, 0x8000001a); | |
2013 | break; | |
2014 | case 0x80000001: | |
2015 | entry->edx &= kvm_supported_word1_x86_features; | |
2016 | entry->ecx &= kvm_supported_word6_x86_features; | |
2017 | break; | |
2018 | } | |
d4330ef2 JR |
2019 | |
2020 | kvm_x86_ops->set_supported_cpuid(function, entry); | |
2021 | ||
07716717 DK |
2022 | put_cpu(); |
2023 | } | |
2024 | ||
7faa4ee1 AK |
2025 | #undef F |
2026 | ||
674eea0f | 2027 | static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2 *cpuid, |
19355475 | 2028 | struct kvm_cpuid_entry2 __user *entries) |
07716717 DK |
2029 | { |
2030 | struct kvm_cpuid_entry2 *cpuid_entries; | |
2031 | int limit, nent = 0, r = -E2BIG; | |
2032 | u32 func; | |
2033 | ||
2034 | if (cpuid->nent < 1) | |
2035 | goto out; | |
6a544355 AK |
2036 | if (cpuid->nent > KVM_MAX_CPUID_ENTRIES) |
2037 | cpuid->nent = KVM_MAX_CPUID_ENTRIES; | |
07716717 DK |
2038 | r = -ENOMEM; |
2039 | cpuid_entries = vmalloc(sizeof(struct kvm_cpuid_entry2) * cpuid->nent); | |
2040 | if (!cpuid_entries) | |
2041 | goto out; | |
2042 | ||
2043 | do_cpuid_ent(&cpuid_entries[0], 0, 0, &nent, cpuid->nent); | |
2044 | limit = cpuid_entries[0].eax; | |
2045 | for (func = 1; func <= limit && nent < cpuid->nent; ++func) | |
2046 | do_cpuid_ent(&cpuid_entries[nent], func, 0, | |
19355475 | 2047 | &nent, cpuid->nent); |
07716717 DK |
2048 | r = -E2BIG; |
2049 | if (nent >= cpuid->nent) | |
2050 | goto out_free; | |
2051 | ||
2052 | do_cpuid_ent(&cpuid_entries[nent], 0x80000000, 0, &nent, cpuid->nent); | |
2053 | limit = cpuid_entries[nent - 1].eax; | |
2054 | for (func = 0x80000001; func <= limit && nent < cpuid->nent; ++func) | |
2055 | do_cpuid_ent(&cpuid_entries[nent], func, 0, | |
19355475 | 2056 | &nent, cpuid->nent); |
84478c82 GC |
2057 | |
2058 | ||
2059 | ||
2060 | r = -E2BIG; | |
2061 | if (nent >= cpuid->nent) | |
2062 | goto out_free; | |
2063 | ||
2064 | do_cpuid_ent(&cpuid_entries[nent], KVM_CPUID_SIGNATURE, 0, &nent, | |
2065 | cpuid->nent); | |
2066 | ||
2067 | r = -E2BIG; | |
2068 | if (nent >= cpuid->nent) | |
2069 | goto out_free; | |
2070 | ||
2071 | do_cpuid_ent(&cpuid_entries[nent], KVM_CPUID_FEATURES, 0, &nent, | |
2072 | cpuid->nent); | |
2073 | ||
cb007648 MM |
2074 | r = -E2BIG; |
2075 | if (nent >= cpuid->nent) | |
2076 | goto out_free; | |
2077 | ||
07716717 DK |
2078 | r = -EFAULT; |
2079 | if (copy_to_user(entries, cpuid_entries, | |
19355475 | 2080 | nent * sizeof(struct kvm_cpuid_entry2))) |
07716717 DK |
2081 | goto out_free; |
2082 | cpuid->nent = nent; | |
2083 | r = 0; | |
2084 | ||
2085 | out_free: | |
2086 | vfree(cpuid_entries); | |
2087 | out: | |
2088 | return r; | |
2089 | } | |
2090 | ||
313a3dc7 CO |
2091 | static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu *vcpu, |
2092 | struct kvm_lapic_state *s) | |
2093 | { | |
ad312c7c | 2094 | memcpy(s->regs, vcpu->arch.apic->regs, sizeof *s); |
313a3dc7 CO |
2095 | |
2096 | return 0; | |
2097 | } | |
2098 | ||
2099 | static int kvm_vcpu_ioctl_set_lapic(struct kvm_vcpu *vcpu, | |
2100 | struct kvm_lapic_state *s) | |
2101 | { | |
ad312c7c | 2102 | memcpy(vcpu->arch.apic->regs, s->regs, sizeof *s); |
313a3dc7 | 2103 | kvm_apic_post_state_restore(vcpu); |
cb142eb7 | 2104 | update_cr8_intercept(vcpu); |
313a3dc7 CO |
2105 | |
2106 | return 0; | |
2107 | } | |
2108 | ||
f77bc6a4 ZX |
2109 | static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, |
2110 | struct kvm_interrupt *irq) | |
2111 | { | |
2112 | if (irq->irq < 0 || irq->irq >= 256) | |
2113 | return -EINVAL; | |
2114 | if (irqchip_in_kernel(vcpu->kvm)) | |
2115 | return -ENXIO; | |
f77bc6a4 | 2116 | |
66fd3f7f | 2117 | kvm_queue_interrupt(vcpu, irq->irq, false); |
f77bc6a4 | 2118 | |
f77bc6a4 ZX |
2119 | return 0; |
2120 | } | |
2121 | ||
c4abb7c9 JK |
2122 | static int kvm_vcpu_ioctl_nmi(struct kvm_vcpu *vcpu) |
2123 | { | |
c4abb7c9 | 2124 | kvm_inject_nmi(vcpu); |
c4abb7c9 JK |
2125 | |
2126 | return 0; | |
2127 | } | |
2128 | ||
b209749f AK |
2129 | static int vcpu_ioctl_tpr_access_reporting(struct kvm_vcpu *vcpu, |
2130 | struct kvm_tpr_access_ctl *tac) | |
2131 | { | |
2132 | if (tac->flags) | |
2133 | return -EINVAL; | |
2134 | vcpu->arch.tpr_access_reporting = !!tac->enabled; | |
2135 | return 0; | |
2136 | } | |
2137 | ||
890ca9ae HY |
2138 | static int kvm_vcpu_ioctl_x86_setup_mce(struct kvm_vcpu *vcpu, |
2139 | u64 mcg_cap) | |
2140 | { | |
2141 | int r; | |
2142 | unsigned bank_num = mcg_cap & 0xff, bank; | |
2143 | ||
2144 | r = -EINVAL; | |
a9e38c3e | 2145 | if (!bank_num || bank_num >= KVM_MAX_MCE_BANKS) |
890ca9ae HY |
2146 | goto out; |
2147 | if (mcg_cap & ~(KVM_MCE_CAP_SUPPORTED | 0xff | 0xff0000)) | |
2148 | goto out; | |
2149 | r = 0; | |
2150 | vcpu->arch.mcg_cap = mcg_cap; | |
2151 | /* Init IA32_MCG_CTL to all 1s */ | |
2152 | if (mcg_cap & MCG_CTL_P) | |
2153 | vcpu->arch.mcg_ctl = ~(u64)0; | |
2154 | /* Init IA32_MCi_CTL to all 1s */ | |
2155 | for (bank = 0; bank < bank_num; bank++) | |
2156 | vcpu->arch.mce_banks[bank*4] = ~(u64)0; | |
2157 | out: | |
2158 | return r; | |
2159 | } | |
2160 | ||
2161 | static int kvm_vcpu_ioctl_x86_set_mce(struct kvm_vcpu *vcpu, | |
2162 | struct kvm_x86_mce *mce) | |
2163 | { | |
2164 | u64 mcg_cap = vcpu->arch.mcg_cap; | |
2165 | unsigned bank_num = mcg_cap & 0xff; | |
2166 | u64 *banks = vcpu->arch.mce_banks; | |
2167 | ||
2168 | if (mce->bank >= bank_num || !(mce->status & MCI_STATUS_VAL)) | |
2169 | return -EINVAL; | |
2170 | /* | |
2171 | * if IA32_MCG_CTL is not all 1s, the uncorrected error | |
2172 | * reporting is disabled | |
2173 | */ | |
2174 | if ((mce->status & MCI_STATUS_UC) && (mcg_cap & MCG_CTL_P) && | |
2175 | vcpu->arch.mcg_ctl != ~(u64)0) | |
2176 | return 0; | |
2177 | banks += 4 * mce->bank; | |
2178 | /* | |
2179 | * if IA32_MCi_CTL is not all 1s, the uncorrected error | |
2180 | * reporting is disabled for the bank | |
2181 | */ | |
2182 | if ((mce->status & MCI_STATUS_UC) && banks[0] != ~(u64)0) | |
2183 | return 0; | |
2184 | if (mce->status & MCI_STATUS_UC) { | |
2185 | if ((vcpu->arch.mcg_status & MCG_STATUS_MCIP) || | |
fc78f519 | 2186 | !kvm_read_cr4_bits(vcpu, X86_CR4_MCE)) { |
890ca9ae HY |
2187 | printk(KERN_DEBUG "kvm: set_mce: " |
2188 | "injects mce exception while " | |
2189 | "previous one is in progress!\n"); | |
2190 | set_bit(KVM_REQ_TRIPLE_FAULT, &vcpu->requests); | |
2191 | return 0; | |
2192 | } | |
2193 | if (banks[1] & MCI_STATUS_VAL) | |
2194 | mce->status |= MCI_STATUS_OVER; | |
2195 | banks[2] = mce->addr; | |
2196 | banks[3] = mce->misc; | |
2197 | vcpu->arch.mcg_status = mce->mcg_status; | |
2198 | banks[1] = mce->status; | |
2199 | kvm_queue_exception(vcpu, MC_VECTOR); | |
2200 | } else if (!(banks[1] & MCI_STATUS_VAL) | |
2201 | || !(banks[1] & MCI_STATUS_UC)) { | |
2202 | if (banks[1] & MCI_STATUS_VAL) | |
2203 | mce->status |= MCI_STATUS_OVER; | |
2204 | banks[2] = mce->addr; | |
2205 | banks[3] = mce->misc; | |
2206 | banks[1] = mce->status; | |
2207 | } else | |
2208 | banks[1] |= MCI_STATUS_OVER; | |
2209 | return 0; | |
2210 | } | |
2211 | ||
3cfc3092 JK |
2212 | static void kvm_vcpu_ioctl_x86_get_vcpu_events(struct kvm_vcpu *vcpu, |
2213 | struct kvm_vcpu_events *events) | |
2214 | { | |
03b82a30 JK |
2215 | events->exception.injected = |
2216 | vcpu->arch.exception.pending && | |
2217 | !kvm_exception_is_soft(vcpu->arch.exception.nr); | |
3cfc3092 JK |
2218 | events->exception.nr = vcpu->arch.exception.nr; |
2219 | events->exception.has_error_code = vcpu->arch.exception.has_error_code; | |
2220 | events->exception.error_code = vcpu->arch.exception.error_code; | |
2221 | ||
03b82a30 JK |
2222 | events->interrupt.injected = |
2223 | vcpu->arch.interrupt.pending && !vcpu->arch.interrupt.soft; | |
3cfc3092 | 2224 | events->interrupt.nr = vcpu->arch.interrupt.nr; |
03b82a30 | 2225 | events->interrupt.soft = 0; |
48005f64 JK |
2226 | events->interrupt.shadow = |
2227 | kvm_x86_ops->get_interrupt_shadow(vcpu, | |
2228 | KVM_X86_SHADOW_INT_MOV_SS | KVM_X86_SHADOW_INT_STI); | |
3cfc3092 JK |
2229 | |
2230 | events->nmi.injected = vcpu->arch.nmi_injected; | |
2231 | events->nmi.pending = vcpu->arch.nmi_pending; | |
2232 | events->nmi.masked = kvm_x86_ops->get_nmi_mask(vcpu); | |
2233 | ||
2234 | events->sipi_vector = vcpu->arch.sipi_vector; | |
2235 | ||
dab4b911 | 2236 | events->flags = (KVM_VCPUEVENT_VALID_NMI_PENDING |
48005f64 JK |
2237 | | KVM_VCPUEVENT_VALID_SIPI_VECTOR |
2238 | | KVM_VCPUEVENT_VALID_SHADOW); | |
3cfc3092 JK |
2239 | } |
2240 | ||
2241 | static int kvm_vcpu_ioctl_x86_set_vcpu_events(struct kvm_vcpu *vcpu, | |
2242 | struct kvm_vcpu_events *events) | |
2243 | { | |
dab4b911 | 2244 | if (events->flags & ~(KVM_VCPUEVENT_VALID_NMI_PENDING |
48005f64 JK |
2245 | | KVM_VCPUEVENT_VALID_SIPI_VECTOR |
2246 | | KVM_VCPUEVENT_VALID_SHADOW)) | |
3cfc3092 JK |
2247 | return -EINVAL; |
2248 | ||
3cfc3092 JK |
2249 | vcpu->arch.exception.pending = events->exception.injected; |
2250 | vcpu->arch.exception.nr = events->exception.nr; | |
2251 | vcpu->arch.exception.has_error_code = events->exception.has_error_code; | |
2252 | vcpu->arch.exception.error_code = events->exception.error_code; | |
2253 | ||
2254 | vcpu->arch.interrupt.pending = events->interrupt.injected; | |
2255 | vcpu->arch.interrupt.nr = events->interrupt.nr; | |
2256 | vcpu->arch.interrupt.soft = events->interrupt.soft; | |
2257 | if (vcpu->arch.interrupt.pending && irqchip_in_kernel(vcpu->kvm)) | |
2258 | kvm_pic_clear_isr_ack(vcpu->kvm); | |
48005f64 JK |
2259 | if (events->flags & KVM_VCPUEVENT_VALID_SHADOW) |
2260 | kvm_x86_ops->set_interrupt_shadow(vcpu, | |
2261 | events->interrupt.shadow); | |
3cfc3092 JK |
2262 | |
2263 | vcpu->arch.nmi_injected = events->nmi.injected; | |
dab4b911 JK |
2264 | if (events->flags & KVM_VCPUEVENT_VALID_NMI_PENDING) |
2265 | vcpu->arch.nmi_pending = events->nmi.pending; | |
3cfc3092 JK |
2266 | kvm_x86_ops->set_nmi_mask(vcpu, events->nmi.masked); |
2267 | ||
dab4b911 JK |
2268 | if (events->flags & KVM_VCPUEVENT_VALID_SIPI_VECTOR) |
2269 | vcpu->arch.sipi_vector = events->sipi_vector; | |
3cfc3092 | 2270 | |
3cfc3092 JK |
2271 | return 0; |
2272 | } | |
2273 | ||
a1efbe77 JK |
2274 | static void kvm_vcpu_ioctl_x86_get_debugregs(struct kvm_vcpu *vcpu, |
2275 | struct kvm_debugregs *dbgregs) | |
2276 | { | |
a1efbe77 JK |
2277 | memcpy(dbgregs->db, vcpu->arch.db, sizeof(vcpu->arch.db)); |
2278 | dbgregs->dr6 = vcpu->arch.dr6; | |
2279 | dbgregs->dr7 = vcpu->arch.dr7; | |
2280 | dbgregs->flags = 0; | |
a1efbe77 JK |
2281 | } |
2282 | ||
2283 | static int kvm_vcpu_ioctl_x86_set_debugregs(struct kvm_vcpu *vcpu, | |
2284 | struct kvm_debugregs *dbgregs) | |
2285 | { | |
2286 | if (dbgregs->flags) | |
2287 | return -EINVAL; | |
2288 | ||
a1efbe77 JK |
2289 | memcpy(vcpu->arch.db, dbgregs->db, sizeof(vcpu->arch.db)); |
2290 | vcpu->arch.dr6 = dbgregs->dr6; | |
2291 | vcpu->arch.dr7 = dbgregs->dr7; | |
2292 | ||
a1efbe77 JK |
2293 | return 0; |
2294 | } | |
2295 | ||
313a3dc7 CO |
2296 | long kvm_arch_vcpu_ioctl(struct file *filp, |
2297 | unsigned int ioctl, unsigned long arg) | |
2298 | { | |
2299 | struct kvm_vcpu *vcpu = filp->private_data; | |
2300 | void __user *argp = (void __user *)arg; | |
2301 | int r; | |
b772ff36 | 2302 | struct kvm_lapic_state *lapic = NULL; |
313a3dc7 CO |
2303 | |
2304 | switch (ioctl) { | |
2305 | case KVM_GET_LAPIC: { | |
2204ae3c MT |
2306 | r = -EINVAL; |
2307 | if (!vcpu->arch.apic) | |
2308 | goto out; | |
b772ff36 | 2309 | lapic = kzalloc(sizeof(struct kvm_lapic_state), GFP_KERNEL); |
313a3dc7 | 2310 | |
b772ff36 DH |
2311 | r = -ENOMEM; |
2312 | if (!lapic) | |
2313 | goto out; | |
2314 | r = kvm_vcpu_ioctl_get_lapic(vcpu, lapic); | |
313a3dc7 CO |
2315 | if (r) |
2316 | goto out; | |
2317 | r = -EFAULT; | |
b772ff36 | 2318 | if (copy_to_user(argp, lapic, sizeof(struct kvm_lapic_state))) |
313a3dc7 CO |
2319 | goto out; |
2320 | r = 0; | |
2321 | break; | |
2322 | } | |
2323 | case KVM_SET_LAPIC: { | |
2204ae3c MT |
2324 | r = -EINVAL; |
2325 | if (!vcpu->arch.apic) | |
2326 | goto out; | |
b772ff36 DH |
2327 | lapic = kmalloc(sizeof(struct kvm_lapic_state), GFP_KERNEL); |
2328 | r = -ENOMEM; | |
2329 | if (!lapic) | |
2330 | goto out; | |
313a3dc7 | 2331 | r = -EFAULT; |
b772ff36 | 2332 | if (copy_from_user(lapic, argp, sizeof(struct kvm_lapic_state))) |
313a3dc7 | 2333 | goto out; |
b772ff36 | 2334 | r = kvm_vcpu_ioctl_set_lapic(vcpu, lapic); |
313a3dc7 CO |
2335 | if (r) |
2336 | goto out; | |
2337 | r = 0; | |
2338 | break; | |
2339 | } | |
f77bc6a4 ZX |
2340 | case KVM_INTERRUPT: { |
2341 | struct kvm_interrupt irq; | |
2342 | ||
2343 | r = -EFAULT; | |
2344 | if (copy_from_user(&irq, argp, sizeof irq)) | |
2345 | goto out; | |
2346 | r = kvm_vcpu_ioctl_interrupt(vcpu, &irq); | |
2347 | if (r) | |
2348 | goto out; | |
2349 | r = 0; | |
2350 | break; | |
2351 | } | |
c4abb7c9 JK |
2352 | case KVM_NMI: { |
2353 | r = kvm_vcpu_ioctl_nmi(vcpu); | |
2354 | if (r) | |
2355 | goto out; | |
2356 | r = 0; | |
2357 | break; | |
2358 | } | |
313a3dc7 CO |
2359 | case KVM_SET_CPUID: { |
2360 | struct kvm_cpuid __user *cpuid_arg = argp; | |
2361 | struct kvm_cpuid cpuid; | |
2362 | ||
2363 | r = -EFAULT; | |
2364 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
2365 | goto out; | |
2366 | r = kvm_vcpu_ioctl_set_cpuid(vcpu, &cpuid, cpuid_arg->entries); | |
2367 | if (r) | |
2368 | goto out; | |
2369 | break; | |
2370 | } | |
07716717 DK |
2371 | case KVM_SET_CPUID2: { |
2372 | struct kvm_cpuid2 __user *cpuid_arg = argp; | |
2373 | struct kvm_cpuid2 cpuid; | |
2374 | ||
2375 | r = -EFAULT; | |
2376 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
2377 | goto out; | |
2378 | r = kvm_vcpu_ioctl_set_cpuid2(vcpu, &cpuid, | |
19355475 | 2379 | cpuid_arg->entries); |
07716717 DK |
2380 | if (r) |
2381 | goto out; | |
2382 | break; | |
2383 | } | |
2384 | case KVM_GET_CPUID2: { | |
2385 | struct kvm_cpuid2 __user *cpuid_arg = argp; | |
2386 | struct kvm_cpuid2 cpuid; | |
2387 | ||
2388 | r = -EFAULT; | |
2389 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
2390 | goto out; | |
2391 | r = kvm_vcpu_ioctl_get_cpuid2(vcpu, &cpuid, | |
19355475 | 2392 | cpuid_arg->entries); |
07716717 DK |
2393 | if (r) |
2394 | goto out; | |
2395 | r = -EFAULT; | |
2396 | if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid)) | |
2397 | goto out; | |
2398 | r = 0; | |
2399 | break; | |
2400 | } | |
313a3dc7 CO |
2401 | case KVM_GET_MSRS: |
2402 | r = msr_io(vcpu, argp, kvm_get_msr, 1); | |
2403 | break; | |
2404 | case KVM_SET_MSRS: | |
2405 | r = msr_io(vcpu, argp, do_set_msr, 0); | |
2406 | break; | |
b209749f AK |
2407 | case KVM_TPR_ACCESS_REPORTING: { |
2408 | struct kvm_tpr_access_ctl tac; | |
2409 | ||
2410 | r = -EFAULT; | |
2411 | if (copy_from_user(&tac, argp, sizeof tac)) | |
2412 | goto out; | |
2413 | r = vcpu_ioctl_tpr_access_reporting(vcpu, &tac); | |
2414 | if (r) | |
2415 | goto out; | |
2416 | r = -EFAULT; | |
2417 | if (copy_to_user(argp, &tac, sizeof tac)) | |
2418 | goto out; | |
2419 | r = 0; | |
2420 | break; | |
2421 | }; | |
b93463aa AK |
2422 | case KVM_SET_VAPIC_ADDR: { |
2423 | struct kvm_vapic_addr va; | |
2424 | ||
2425 | r = -EINVAL; | |
2426 | if (!irqchip_in_kernel(vcpu->kvm)) | |
2427 | goto out; | |
2428 | r = -EFAULT; | |
2429 | if (copy_from_user(&va, argp, sizeof va)) | |
2430 | goto out; | |
2431 | r = 0; | |
2432 | kvm_lapic_set_vapic_addr(vcpu, va.vapic_addr); | |
2433 | break; | |
2434 | } | |
890ca9ae HY |
2435 | case KVM_X86_SETUP_MCE: { |
2436 | u64 mcg_cap; | |
2437 | ||
2438 | r = -EFAULT; | |
2439 | if (copy_from_user(&mcg_cap, argp, sizeof mcg_cap)) | |
2440 | goto out; | |
2441 | r = kvm_vcpu_ioctl_x86_setup_mce(vcpu, mcg_cap); | |
2442 | break; | |
2443 | } | |
2444 | case KVM_X86_SET_MCE: { | |
2445 | struct kvm_x86_mce mce; | |
2446 | ||
2447 | r = -EFAULT; | |
2448 | if (copy_from_user(&mce, argp, sizeof mce)) | |
2449 | goto out; | |
2450 | r = kvm_vcpu_ioctl_x86_set_mce(vcpu, &mce); | |
2451 | break; | |
2452 | } | |
3cfc3092 JK |
2453 | case KVM_GET_VCPU_EVENTS: { |
2454 | struct kvm_vcpu_events events; | |
2455 | ||
2456 | kvm_vcpu_ioctl_x86_get_vcpu_events(vcpu, &events); | |
2457 | ||
2458 | r = -EFAULT; | |
2459 | if (copy_to_user(argp, &events, sizeof(struct kvm_vcpu_events))) | |
2460 | break; | |
2461 | r = 0; | |
2462 | break; | |
2463 | } | |
2464 | case KVM_SET_VCPU_EVENTS: { | |
2465 | struct kvm_vcpu_events events; | |
2466 | ||
2467 | r = -EFAULT; | |
2468 | if (copy_from_user(&events, argp, sizeof(struct kvm_vcpu_events))) | |
2469 | break; | |
2470 | ||
2471 | r = kvm_vcpu_ioctl_x86_set_vcpu_events(vcpu, &events); | |
2472 | break; | |
2473 | } | |
a1efbe77 JK |
2474 | case KVM_GET_DEBUGREGS: { |
2475 | struct kvm_debugregs dbgregs; | |
2476 | ||
2477 | kvm_vcpu_ioctl_x86_get_debugregs(vcpu, &dbgregs); | |
2478 | ||
2479 | r = -EFAULT; | |
2480 | if (copy_to_user(argp, &dbgregs, | |
2481 | sizeof(struct kvm_debugregs))) | |
2482 | break; | |
2483 | r = 0; | |
2484 | break; | |
2485 | } | |
2486 | case KVM_SET_DEBUGREGS: { | |
2487 | struct kvm_debugregs dbgregs; | |
2488 | ||
2489 | r = -EFAULT; | |
2490 | if (copy_from_user(&dbgregs, argp, | |
2491 | sizeof(struct kvm_debugregs))) | |
2492 | break; | |
2493 | ||
2494 | r = kvm_vcpu_ioctl_x86_set_debugregs(vcpu, &dbgregs); | |
2495 | break; | |
2496 | } | |
313a3dc7 CO |
2497 | default: |
2498 | r = -EINVAL; | |
2499 | } | |
2500 | out: | |
7a6ce84c | 2501 | kfree(lapic); |
313a3dc7 CO |
2502 | return r; |
2503 | } | |
2504 | ||
1fe779f8 CO |
2505 | static int kvm_vm_ioctl_set_tss_addr(struct kvm *kvm, unsigned long addr) |
2506 | { | |
2507 | int ret; | |
2508 | ||
2509 | if (addr > (unsigned int)(-3 * PAGE_SIZE)) | |
2510 | return -1; | |
2511 | ret = kvm_x86_ops->set_tss_addr(kvm, addr); | |
2512 | return ret; | |
2513 | } | |
2514 | ||
b927a3ce SY |
2515 | static int kvm_vm_ioctl_set_identity_map_addr(struct kvm *kvm, |
2516 | u64 ident_addr) | |
2517 | { | |
2518 | kvm->arch.ept_identity_map_addr = ident_addr; | |
2519 | return 0; | |
2520 | } | |
2521 | ||
1fe779f8 CO |
2522 | static int kvm_vm_ioctl_set_nr_mmu_pages(struct kvm *kvm, |
2523 | u32 kvm_nr_mmu_pages) | |
2524 | { | |
2525 | if (kvm_nr_mmu_pages < KVM_MIN_ALLOC_MMU_PAGES) | |
2526 | return -EINVAL; | |
2527 | ||
79fac95e | 2528 | mutex_lock(&kvm->slots_lock); |
7c8a83b7 | 2529 | spin_lock(&kvm->mmu_lock); |
1fe779f8 CO |
2530 | |
2531 | kvm_mmu_change_mmu_pages(kvm, kvm_nr_mmu_pages); | |
f05e70ac | 2532 | kvm->arch.n_requested_mmu_pages = kvm_nr_mmu_pages; |
1fe779f8 | 2533 | |
7c8a83b7 | 2534 | spin_unlock(&kvm->mmu_lock); |
79fac95e | 2535 | mutex_unlock(&kvm->slots_lock); |
1fe779f8 CO |
2536 | return 0; |
2537 | } | |
2538 | ||
2539 | static int kvm_vm_ioctl_get_nr_mmu_pages(struct kvm *kvm) | |
2540 | { | |
f05e70ac | 2541 | return kvm->arch.n_alloc_mmu_pages; |
1fe779f8 CO |
2542 | } |
2543 | ||
a983fb23 MT |
2544 | gfn_t unalias_gfn_instantiation(struct kvm *kvm, gfn_t gfn) |
2545 | { | |
2546 | int i; | |
2547 | struct kvm_mem_alias *alias; | |
2548 | struct kvm_mem_aliases *aliases; | |
2549 | ||
90d83dc3 | 2550 | aliases = kvm_aliases(kvm); |
a983fb23 MT |
2551 | |
2552 | for (i = 0; i < aliases->naliases; ++i) { | |
2553 | alias = &aliases->aliases[i]; | |
2554 | if (alias->flags & KVM_ALIAS_INVALID) | |
2555 | continue; | |
2556 | if (gfn >= alias->base_gfn | |
2557 | && gfn < alias->base_gfn + alias->npages) | |
2558 | return alias->target_gfn + gfn - alias->base_gfn; | |
2559 | } | |
2560 | return gfn; | |
2561 | } | |
2562 | ||
e9f85cde ZX |
2563 | gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn) |
2564 | { | |
2565 | int i; | |
2566 | struct kvm_mem_alias *alias; | |
a983fb23 MT |
2567 | struct kvm_mem_aliases *aliases; |
2568 | ||
90d83dc3 | 2569 | aliases = kvm_aliases(kvm); |
e9f85cde | 2570 | |
fef9cce0 MT |
2571 | for (i = 0; i < aliases->naliases; ++i) { |
2572 | alias = &aliases->aliases[i]; | |
e9f85cde ZX |
2573 | if (gfn >= alias->base_gfn |
2574 | && gfn < alias->base_gfn + alias->npages) | |
2575 | return alias->target_gfn + gfn - alias->base_gfn; | |
2576 | } | |
2577 | return gfn; | |
2578 | } | |
2579 | ||
1fe779f8 CO |
2580 | /* |
2581 | * Set a new alias region. Aliases map a portion of physical memory into | |
2582 | * another portion. This is useful for memory windows, for example the PC | |
2583 | * VGA region. | |
2584 | */ | |
2585 | static int kvm_vm_ioctl_set_memory_alias(struct kvm *kvm, | |
2586 | struct kvm_memory_alias *alias) | |
2587 | { | |
2588 | int r, n; | |
2589 | struct kvm_mem_alias *p; | |
a983fb23 | 2590 | struct kvm_mem_aliases *aliases, *old_aliases; |
1fe779f8 CO |
2591 | |
2592 | r = -EINVAL; | |
2593 | /* General sanity checks */ | |
2594 | if (alias->memory_size & (PAGE_SIZE - 1)) | |
2595 | goto out; | |
2596 | if (alias->guest_phys_addr & (PAGE_SIZE - 1)) | |
2597 | goto out; | |
2598 | if (alias->slot >= KVM_ALIAS_SLOTS) | |
2599 | goto out; | |
2600 | if (alias->guest_phys_addr + alias->memory_size | |
2601 | < alias->guest_phys_addr) | |
2602 | goto out; | |
2603 | if (alias->target_phys_addr + alias->memory_size | |
2604 | < alias->target_phys_addr) | |
2605 | goto out; | |
2606 | ||
a983fb23 MT |
2607 | r = -ENOMEM; |
2608 | aliases = kzalloc(sizeof(struct kvm_mem_aliases), GFP_KERNEL); | |
2609 | if (!aliases) | |
2610 | goto out; | |
2611 | ||
79fac95e | 2612 | mutex_lock(&kvm->slots_lock); |
1fe779f8 | 2613 | |
a983fb23 MT |
2614 | /* invalidate any gfn reference in case of deletion/shrinking */ |
2615 | memcpy(aliases, kvm->arch.aliases, sizeof(struct kvm_mem_aliases)); | |
2616 | aliases->aliases[alias->slot].flags |= KVM_ALIAS_INVALID; | |
2617 | old_aliases = kvm->arch.aliases; | |
2618 | rcu_assign_pointer(kvm->arch.aliases, aliases); | |
2619 | synchronize_srcu_expedited(&kvm->srcu); | |
2620 | kvm_mmu_zap_all(kvm); | |
2621 | kfree(old_aliases); | |
2622 | ||
2623 | r = -ENOMEM; | |
2624 | aliases = kzalloc(sizeof(struct kvm_mem_aliases), GFP_KERNEL); | |
2625 | if (!aliases) | |
2626 | goto out_unlock; | |
2627 | ||
2628 | memcpy(aliases, kvm->arch.aliases, sizeof(struct kvm_mem_aliases)); | |
fef9cce0 MT |
2629 | |
2630 | p = &aliases->aliases[alias->slot]; | |
1fe779f8 CO |
2631 | p->base_gfn = alias->guest_phys_addr >> PAGE_SHIFT; |
2632 | p->npages = alias->memory_size >> PAGE_SHIFT; | |
2633 | p->target_gfn = alias->target_phys_addr >> PAGE_SHIFT; | |
a983fb23 | 2634 | p->flags &= ~(KVM_ALIAS_INVALID); |
1fe779f8 CO |
2635 | |
2636 | for (n = KVM_ALIAS_SLOTS; n > 0; --n) | |
fef9cce0 | 2637 | if (aliases->aliases[n - 1].npages) |
1fe779f8 | 2638 | break; |
fef9cce0 | 2639 | aliases->naliases = n; |
1fe779f8 | 2640 | |
a983fb23 MT |
2641 | old_aliases = kvm->arch.aliases; |
2642 | rcu_assign_pointer(kvm->arch.aliases, aliases); | |
2643 | synchronize_srcu_expedited(&kvm->srcu); | |
2644 | kfree(old_aliases); | |
2645 | r = 0; | |
1fe779f8 | 2646 | |
a983fb23 | 2647 | out_unlock: |
79fac95e | 2648 | mutex_unlock(&kvm->slots_lock); |
1fe779f8 CO |
2649 | out: |
2650 | return r; | |
2651 | } | |
2652 | ||
2653 | static int kvm_vm_ioctl_get_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: | |
2660 | memcpy(&chip->chip.pic, | |
2661 | &pic_irqchip(kvm)->pics[0], | |
2662 | sizeof(struct kvm_pic_state)); | |
2663 | break; | |
2664 | case KVM_IRQCHIP_PIC_SLAVE: | |
2665 | memcpy(&chip->chip.pic, | |
2666 | &pic_irqchip(kvm)->pics[1], | |
2667 | sizeof(struct kvm_pic_state)); | |
2668 | break; | |
2669 | case KVM_IRQCHIP_IOAPIC: | |
eba0226b | 2670 | r = kvm_get_ioapic(kvm, &chip->chip.ioapic); |
1fe779f8 CO |
2671 | break; |
2672 | default: | |
2673 | r = -EINVAL; | |
2674 | break; | |
2675 | } | |
2676 | return r; | |
2677 | } | |
2678 | ||
2679 | static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) | |
2680 | { | |
2681 | int r; | |
2682 | ||
2683 | r = 0; | |
2684 | switch (chip->chip_id) { | |
2685 | case KVM_IRQCHIP_PIC_MASTER: | |
fa8273e9 | 2686 | raw_spin_lock(&pic_irqchip(kvm)->lock); |
1fe779f8 CO |
2687 | memcpy(&pic_irqchip(kvm)->pics[0], |
2688 | &chip->chip.pic, | |
2689 | sizeof(struct kvm_pic_state)); | |
fa8273e9 | 2690 | raw_spin_unlock(&pic_irqchip(kvm)->lock); |
1fe779f8 CO |
2691 | break; |
2692 | case KVM_IRQCHIP_PIC_SLAVE: | |
fa8273e9 | 2693 | raw_spin_lock(&pic_irqchip(kvm)->lock); |
1fe779f8 CO |
2694 | memcpy(&pic_irqchip(kvm)->pics[1], |
2695 | &chip->chip.pic, | |
2696 | sizeof(struct kvm_pic_state)); | |
fa8273e9 | 2697 | raw_spin_unlock(&pic_irqchip(kvm)->lock); |
1fe779f8 CO |
2698 | break; |
2699 | case KVM_IRQCHIP_IOAPIC: | |
eba0226b | 2700 | r = kvm_set_ioapic(kvm, &chip->chip.ioapic); |
1fe779f8 CO |
2701 | break; |
2702 | default: | |
2703 | r = -EINVAL; | |
2704 | break; | |
2705 | } | |
2706 | kvm_pic_update_irq(pic_irqchip(kvm)); | |
2707 | return r; | |
2708 | } | |
2709 | ||
e0f63cb9 SY |
2710 | static int kvm_vm_ioctl_get_pit(struct kvm *kvm, struct kvm_pit_state *ps) |
2711 | { | |
2712 | int r = 0; | |
2713 | ||
894a9c55 | 2714 | mutex_lock(&kvm->arch.vpit->pit_state.lock); |
e0f63cb9 | 2715 | memcpy(ps, &kvm->arch.vpit->pit_state, sizeof(struct kvm_pit_state)); |
894a9c55 | 2716 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); |
e0f63cb9 SY |
2717 | return r; |
2718 | } | |
2719 | ||
2720 | static int kvm_vm_ioctl_set_pit(struct kvm *kvm, struct kvm_pit_state *ps) | |
2721 | { | |
2722 | int r = 0; | |
2723 | ||
894a9c55 | 2724 | mutex_lock(&kvm->arch.vpit->pit_state.lock); |
e0f63cb9 | 2725 | memcpy(&kvm->arch.vpit->pit_state, ps, sizeof(struct kvm_pit_state)); |
e9f42757 BK |
2726 | kvm_pit_load_count(kvm, 0, ps->channels[0].count, 0); |
2727 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); | |
2728 | return r; | |
2729 | } | |
2730 | ||
2731 | static int kvm_vm_ioctl_get_pit2(struct kvm *kvm, struct kvm_pit_state2 *ps) | |
2732 | { | |
2733 | int r = 0; | |
2734 | ||
2735 | mutex_lock(&kvm->arch.vpit->pit_state.lock); | |
2736 | memcpy(ps->channels, &kvm->arch.vpit->pit_state.channels, | |
2737 | sizeof(ps->channels)); | |
2738 | ps->flags = kvm->arch.vpit->pit_state.flags; | |
2739 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); | |
2740 | return r; | |
2741 | } | |
2742 | ||
2743 | static int kvm_vm_ioctl_set_pit2(struct kvm *kvm, struct kvm_pit_state2 *ps) | |
2744 | { | |
2745 | int r = 0, start = 0; | |
2746 | u32 prev_legacy, cur_legacy; | |
2747 | mutex_lock(&kvm->arch.vpit->pit_state.lock); | |
2748 | prev_legacy = kvm->arch.vpit->pit_state.flags & KVM_PIT_FLAGS_HPET_LEGACY; | |
2749 | cur_legacy = ps->flags & KVM_PIT_FLAGS_HPET_LEGACY; | |
2750 | if (!prev_legacy && cur_legacy) | |
2751 | start = 1; | |
2752 | memcpy(&kvm->arch.vpit->pit_state.channels, &ps->channels, | |
2753 | sizeof(kvm->arch.vpit->pit_state.channels)); | |
2754 | kvm->arch.vpit->pit_state.flags = ps->flags; | |
2755 | kvm_pit_load_count(kvm, 0, kvm->arch.vpit->pit_state.channels[0].count, start); | |
894a9c55 | 2756 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); |
e0f63cb9 SY |
2757 | return r; |
2758 | } | |
2759 | ||
52d939a0 MT |
2760 | static int kvm_vm_ioctl_reinject(struct kvm *kvm, |
2761 | struct kvm_reinject_control *control) | |
2762 | { | |
2763 | if (!kvm->arch.vpit) | |
2764 | return -ENXIO; | |
894a9c55 | 2765 | mutex_lock(&kvm->arch.vpit->pit_state.lock); |
52d939a0 | 2766 | kvm->arch.vpit->pit_state.pit_timer.reinject = control->pit_reinject; |
894a9c55 | 2767 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); |
52d939a0 MT |
2768 | return 0; |
2769 | } | |
2770 | ||
5bb064dc ZX |
2771 | /* |
2772 | * Get (and clear) the dirty memory log for a memory slot. | |
2773 | */ | |
2774 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, | |
2775 | struct kvm_dirty_log *log) | |
2776 | { | |
87bf6e7d | 2777 | int r, i; |
5bb064dc | 2778 | struct kvm_memory_slot *memslot; |
87bf6e7d | 2779 | unsigned long n; |
b050b015 | 2780 | unsigned long is_dirty = 0; |
5bb064dc | 2781 | |
79fac95e | 2782 | mutex_lock(&kvm->slots_lock); |
5bb064dc | 2783 | |
b050b015 MT |
2784 | r = -EINVAL; |
2785 | if (log->slot >= KVM_MEMORY_SLOTS) | |
2786 | goto out; | |
2787 | ||
2788 | memslot = &kvm->memslots->memslots[log->slot]; | |
2789 | r = -ENOENT; | |
2790 | if (!memslot->dirty_bitmap) | |
2791 | goto out; | |
2792 | ||
87bf6e7d | 2793 | n = kvm_dirty_bitmap_bytes(memslot); |
b050b015 | 2794 | |
b050b015 MT |
2795 | for (i = 0; !is_dirty && i < n/sizeof(long); i++) |
2796 | is_dirty = memslot->dirty_bitmap[i]; | |
5bb064dc ZX |
2797 | |
2798 | /* If nothing is dirty, don't bother messing with page tables. */ | |
2799 | if (is_dirty) { | |
b050b015 | 2800 | struct kvm_memslots *slots, *old_slots; |
914ebccd | 2801 | unsigned long *dirty_bitmap; |
b050b015 | 2802 | |
7c8a83b7 | 2803 | spin_lock(&kvm->mmu_lock); |
5bb064dc | 2804 | kvm_mmu_slot_remove_write_access(kvm, log->slot); |
7c8a83b7 | 2805 | spin_unlock(&kvm->mmu_lock); |
b050b015 | 2806 | |
914ebccd TY |
2807 | r = -ENOMEM; |
2808 | dirty_bitmap = vmalloc(n); | |
2809 | if (!dirty_bitmap) | |
2810 | goto out; | |
2811 | memset(dirty_bitmap, 0, n); | |
b050b015 | 2812 | |
914ebccd TY |
2813 | r = -ENOMEM; |
2814 | slots = kzalloc(sizeof(struct kvm_memslots), GFP_KERNEL); | |
2815 | if (!slots) { | |
2816 | vfree(dirty_bitmap); | |
2817 | goto out; | |
2818 | } | |
b050b015 MT |
2819 | memcpy(slots, kvm->memslots, sizeof(struct kvm_memslots)); |
2820 | slots->memslots[log->slot].dirty_bitmap = dirty_bitmap; | |
2821 | ||
2822 | old_slots = kvm->memslots; | |
2823 | rcu_assign_pointer(kvm->memslots, slots); | |
2824 | synchronize_srcu_expedited(&kvm->srcu); | |
2825 | dirty_bitmap = old_slots->memslots[log->slot].dirty_bitmap; | |
2826 | kfree(old_slots); | |
914ebccd TY |
2827 | |
2828 | r = -EFAULT; | |
2829 | if (copy_to_user(log->dirty_bitmap, dirty_bitmap, n)) { | |
2830 | vfree(dirty_bitmap); | |
2831 | goto out; | |
2832 | } | |
2833 | vfree(dirty_bitmap); | |
2834 | } else { | |
2835 | r = -EFAULT; | |
2836 | if (clear_user(log->dirty_bitmap, n)) | |
2837 | goto out; | |
5bb064dc | 2838 | } |
b050b015 | 2839 | |
5bb064dc ZX |
2840 | r = 0; |
2841 | out: | |
79fac95e | 2842 | mutex_unlock(&kvm->slots_lock); |
5bb064dc ZX |
2843 | return r; |
2844 | } | |
2845 | ||
1fe779f8 CO |
2846 | long kvm_arch_vm_ioctl(struct file *filp, |
2847 | unsigned int ioctl, unsigned long arg) | |
2848 | { | |
2849 | struct kvm *kvm = filp->private_data; | |
2850 | void __user *argp = (void __user *)arg; | |
367e1319 | 2851 | int r = -ENOTTY; |
f0d66275 DH |
2852 | /* |
2853 | * This union makes it completely explicit to gcc-3.x | |
2854 | * that these two variables' stack usage should be | |
2855 | * combined, not added together. | |
2856 | */ | |
2857 | union { | |
2858 | struct kvm_pit_state ps; | |
e9f42757 | 2859 | struct kvm_pit_state2 ps2; |
f0d66275 | 2860 | struct kvm_memory_alias alias; |
c5ff41ce | 2861 | struct kvm_pit_config pit_config; |
f0d66275 | 2862 | } u; |
1fe779f8 CO |
2863 | |
2864 | switch (ioctl) { | |
2865 | case KVM_SET_TSS_ADDR: | |
2866 | r = kvm_vm_ioctl_set_tss_addr(kvm, arg); | |
2867 | if (r < 0) | |
2868 | goto out; | |
2869 | break; | |
b927a3ce SY |
2870 | case KVM_SET_IDENTITY_MAP_ADDR: { |
2871 | u64 ident_addr; | |
2872 | ||
2873 | r = -EFAULT; | |
2874 | if (copy_from_user(&ident_addr, argp, sizeof ident_addr)) | |
2875 | goto out; | |
2876 | r = kvm_vm_ioctl_set_identity_map_addr(kvm, ident_addr); | |
2877 | if (r < 0) | |
2878 | goto out; | |
2879 | break; | |
2880 | } | |
1fe779f8 CO |
2881 | case KVM_SET_MEMORY_REGION: { |
2882 | struct kvm_memory_region kvm_mem; | |
2883 | struct kvm_userspace_memory_region kvm_userspace_mem; | |
2884 | ||
2885 | r = -EFAULT; | |
2886 | if (copy_from_user(&kvm_mem, argp, sizeof kvm_mem)) | |
2887 | goto out; | |
2888 | kvm_userspace_mem.slot = kvm_mem.slot; | |
2889 | kvm_userspace_mem.flags = kvm_mem.flags; | |
2890 | kvm_userspace_mem.guest_phys_addr = kvm_mem.guest_phys_addr; | |
2891 | kvm_userspace_mem.memory_size = kvm_mem.memory_size; | |
2892 | r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_userspace_mem, 0); | |
2893 | if (r) | |
2894 | goto out; | |
2895 | break; | |
2896 | } | |
2897 | case KVM_SET_NR_MMU_PAGES: | |
2898 | r = kvm_vm_ioctl_set_nr_mmu_pages(kvm, arg); | |
2899 | if (r) | |
2900 | goto out; | |
2901 | break; | |
2902 | case KVM_GET_NR_MMU_PAGES: | |
2903 | r = kvm_vm_ioctl_get_nr_mmu_pages(kvm); | |
2904 | break; | |
f0d66275 | 2905 | case KVM_SET_MEMORY_ALIAS: |
1fe779f8 | 2906 | r = -EFAULT; |
f0d66275 | 2907 | if (copy_from_user(&u.alias, argp, sizeof(struct kvm_memory_alias))) |
1fe779f8 | 2908 | goto out; |
f0d66275 | 2909 | r = kvm_vm_ioctl_set_memory_alias(kvm, &u.alias); |
1fe779f8 CO |
2910 | if (r) |
2911 | goto out; | |
2912 | break; | |
3ddea128 MT |
2913 | case KVM_CREATE_IRQCHIP: { |
2914 | struct kvm_pic *vpic; | |
2915 | ||
2916 | mutex_lock(&kvm->lock); | |
2917 | r = -EEXIST; | |
2918 | if (kvm->arch.vpic) | |
2919 | goto create_irqchip_unlock; | |
1fe779f8 | 2920 | r = -ENOMEM; |
3ddea128 MT |
2921 | vpic = kvm_create_pic(kvm); |
2922 | if (vpic) { | |
1fe779f8 CO |
2923 | r = kvm_ioapic_init(kvm); |
2924 | if (r) { | |
72bb2fcd WY |
2925 | kvm_io_bus_unregister_dev(kvm, KVM_PIO_BUS, |
2926 | &vpic->dev); | |
3ddea128 MT |
2927 | kfree(vpic); |
2928 | goto create_irqchip_unlock; | |
1fe779f8 CO |
2929 | } |
2930 | } else | |
3ddea128 MT |
2931 | goto create_irqchip_unlock; |
2932 | smp_wmb(); | |
2933 | kvm->arch.vpic = vpic; | |
2934 | smp_wmb(); | |
399ec807 AK |
2935 | r = kvm_setup_default_irq_routing(kvm); |
2936 | if (r) { | |
3ddea128 | 2937 | mutex_lock(&kvm->irq_lock); |
72bb2fcd WY |
2938 | kvm_ioapic_destroy(kvm); |
2939 | kvm_destroy_pic(kvm); | |
3ddea128 | 2940 | mutex_unlock(&kvm->irq_lock); |
399ec807 | 2941 | } |
3ddea128 MT |
2942 | create_irqchip_unlock: |
2943 | mutex_unlock(&kvm->lock); | |
1fe779f8 | 2944 | break; |
3ddea128 | 2945 | } |
7837699f | 2946 | case KVM_CREATE_PIT: |
c5ff41ce JK |
2947 | u.pit_config.flags = KVM_PIT_SPEAKER_DUMMY; |
2948 | goto create_pit; | |
2949 | case KVM_CREATE_PIT2: | |
2950 | r = -EFAULT; | |
2951 | if (copy_from_user(&u.pit_config, argp, | |
2952 | sizeof(struct kvm_pit_config))) | |
2953 | goto out; | |
2954 | create_pit: | |
79fac95e | 2955 | mutex_lock(&kvm->slots_lock); |
269e05e4 AK |
2956 | r = -EEXIST; |
2957 | if (kvm->arch.vpit) | |
2958 | goto create_pit_unlock; | |
7837699f | 2959 | r = -ENOMEM; |
c5ff41ce | 2960 | kvm->arch.vpit = kvm_create_pit(kvm, u.pit_config.flags); |
7837699f SY |
2961 | if (kvm->arch.vpit) |
2962 | r = 0; | |
269e05e4 | 2963 | create_pit_unlock: |
79fac95e | 2964 | mutex_unlock(&kvm->slots_lock); |
7837699f | 2965 | break; |
4925663a | 2966 | case KVM_IRQ_LINE_STATUS: |
1fe779f8 CO |
2967 | case KVM_IRQ_LINE: { |
2968 | struct kvm_irq_level irq_event; | |
2969 | ||
2970 | r = -EFAULT; | |
2971 | if (copy_from_user(&irq_event, argp, sizeof irq_event)) | |
2972 | goto out; | |
160d2f6c | 2973 | r = -ENXIO; |
1fe779f8 | 2974 | if (irqchip_in_kernel(kvm)) { |
4925663a | 2975 | __s32 status; |
4925663a GN |
2976 | status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID, |
2977 | irq_event.irq, irq_event.level); | |
4925663a | 2978 | if (ioctl == KVM_IRQ_LINE_STATUS) { |
160d2f6c | 2979 | r = -EFAULT; |
4925663a GN |
2980 | irq_event.status = status; |
2981 | if (copy_to_user(argp, &irq_event, | |
2982 | sizeof irq_event)) | |
2983 | goto out; | |
2984 | } | |
1fe779f8 CO |
2985 | r = 0; |
2986 | } | |
2987 | break; | |
2988 | } | |
2989 | case KVM_GET_IRQCHIP: { | |
2990 | /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ | |
f0d66275 | 2991 | struct kvm_irqchip *chip = kmalloc(sizeof(*chip), GFP_KERNEL); |
1fe779f8 | 2992 | |
f0d66275 DH |
2993 | r = -ENOMEM; |
2994 | if (!chip) | |
1fe779f8 | 2995 | goto out; |
f0d66275 DH |
2996 | r = -EFAULT; |
2997 | if (copy_from_user(chip, argp, sizeof *chip)) | |
2998 | goto get_irqchip_out; | |
1fe779f8 CO |
2999 | r = -ENXIO; |
3000 | if (!irqchip_in_kernel(kvm)) | |
f0d66275 DH |
3001 | goto get_irqchip_out; |
3002 | r = kvm_vm_ioctl_get_irqchip(kvm, chip); | |
1fe779f8 | 3003 | if (r) |
f0d66275 | 3004 | goto get_irqchip_out; |
1fe779f8 | 3005 | r = -EFAULT; |
f0d66275 DH |
3006 | if (copy_to_user(argp, chip, sizeof *chip)) |
3007 | goto get_irqchip_out; | |
1fe779f8 | 3008 | r = 0; |
f0d66275 DH |
3009 | get_irqchip_out: |
3010 | kfree(chip); | |
3011 | if (r) | |
3012 | goto out; | |
1fe779f8 CO |
3013 | break; |
3014 | } | |
3015 | case KVM_SET_IRQCHIP: { | |
3016 | /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ | |
f0d66275 | 3017 | struct kvm_irqchip *chip = kmalloc(sizeof(*chip), GFP_KERNEL); |
1fe779f8 | 3018 | |
f0d66275 DH |
3019 | r = -ENOMEM; |
3020 | if (!chip) | |
1fe779f8 | 3021 | goto out; |
f0d66275 DH |
3022 | r = -EFAULT; |
3023 | if (copy_from_user(chip, argp, sizeof *chip)) | |
3024 | goto set_irqchip_out; | |
1fe779f8 CO |
3025 | r = -ENXIO; |
3026 | if (!irqchip_in_kernel(kvm)) | |
f0d66275 DH |
3027 | goto set_irqchip_out; |
3028 | r = kvm_vm_ioctl_set_irqchip(kvm, chip); | |
1fe779f8 | 3029 | if (r) |
f0d66275 | 3030 | goto set_irqchip_out; |
1fe779f8 | 3031 | r = 0; |
f0d66275 DH |
3032 | set_irqchip_out: |
3033 | kfree(chip); | |
3034 | if (r) | |
3035 | goto out; | |
1fe779f8 CO |
3036 | break; |
3037 | } | |
e0f63cb9 | 3038 | case KVM_GET_PIT: { |
e0f63cb9 | 3039 | r = -EFAULT; |
f0d66275 | 3040 | if (copy_from_user(&u.ps, argp, sizeof(struct kvm_pit_state))) |
e0f63cb9 SY |
3041 | goto out; |
3042 | r = -ENXIO; | |
3043 | if (!kvm->arch.vpit) | |
3044 | goto out; | |
f0d66275 | 3045 | r = kvm_vm_ioctl_get_pit(kvm, &u.ps); |
e0f63cb9 SY |
3046 | if (r) |
3047 | goto out; | |
3048 | r = -EFAULT; | |
f0d66275 | 3049 | if (copy_to_user(argp, &u.ps, sizeof(struct kvm_pit_state))) |
e0f63cb9 SY |
3050 | goto out; |
3051 | r = 0; | |
3052 | break; | |
3053 | } | |
3054 | case KVM_SET_PIT: { | |
e0f63cb9 | 3055 | r = -EFAULT; |
f0d66275 | 3056 | if (copy_from_user(&u.ps, argp, sizeof u.ps)) |
e0f63cb9 SY |
3057 | goto out; |
3058 | r = -ENXIO; | |
3059 | if (!kvm->arch.vpit) | |
3060 | goto out; | |
f0d66275 | 3061 | r = kvm_vm_ioctl_set_pit(kvm, &u.ps); |
e0f63cb9 SY |
3062 | if (r) |
3063 | goto out; | |
3064 | r = 0; | |
3065 | break; | |
3066 | } | |
e9f42757 BK |
3067 | case KVM_GET_PIT2: { |
3068 | r = -ENXIO; | |
3069 | if (!kvm->arch.vpit) | |
3070 | goto out; | |
3071 | r = kvm_vm_ioctl_get_pit2(kvm, &u.ps2); | |
3072 | if (r) | |
3073 | goto out; | |
3074 | r = -EFAULT; | |
3075 | if (copy_to_user(argp, &u.ps2, sizeof(u.ps2))) | |
3076 | goto out; | |
3077 | r = 0; | |
3078 | break; | |
3079 | } | |
3080 | case KVM_SET_PIT2: { | |
3081 | r = -EFAULT; | |
3082 | if (copy_from_user(&u.ps2, argp, sizeof(u.ps2))) | |
3083 | goto out; | |
3084 | r = -ENXIO; | |
3085 | if (!kvm->arch.vpit) | |
3086 | goto out; | |
3087 | r = kvm_vm_ioctl_set_pit2(kvm, &u.ps2); | |
3088 | if (r) | |
3089 | goto out; | |
3090 | r = 0; | |
3091 | break; | |
3092 | } | |
52d939a0 MT |
3093 | case KVM_REINJECT_CONTROL: { |
3094 | struct kvm_reinject_control control; | |
3095 | r = -EFAULT; | |
3096 | if (copy_from_user(&control, argp, sizeof(control))) | |
3097 | goto out; | |
3098 | r = kvm_vm_ioctl_reinject(kvm, &control); | |
3099 | if (r) | |
3100 | goto out; | |
3101 | r = 0; | |
3102 | break; | |
3103 | } | |
ffde22ac ES |
3104 | case KVM_XEN_HVM_CONFIG: { |
3105 | r = -EFAULT; | |
3106 | if (copy_from_user(&kvm->arch.xen_hvm_config, argp, | |
3107 | sizeof(struct kvm_xen_hvm_config))) | |
3108 | goto out; | |
3109 | r = -EINVAL; | |
3110 | if (kvm->arch.xen_hvm_config.flags) | |
3111 | goto out; | |
3112 | r = 0; | |
3113 | break; | |
3114 | } | |
afbcf7ab GC |
3115 | case KVM_SET_CLOCK: { |
3116 | struct timespec now; | |
3117 | struct kvm_clock_data user_ns; | |
3118 | u64 now_ns; | |
3119 | s64 delta; | |
3120 | ||
3121 | r = -EFAULT; | |
3122 | if (copy_from_user(&user_ns, argp, sizeof(user_ns))) | |
3123 | goto out; | |
3124 | ||
3125 | r = -EINVAL; | |
3126 | if (user_ns.flags) | |
3127 | goto out; | |
3128 | ||
3129 | r = 0; | |
3130 | ktime_get_ts(&now); | |
3131 | now_ns = timespec_to_ns(&now); | |
3132 | delta = user_ns.clock - now_ns; | |
3133 | kvm->arch.kvmclock_offset = delta; | |
3134 | break; | |
3135 | } | |
3136 | case KVM_GET_CLOCK: { | |
3137 | struct timespec now; | |
3138 | struct kvm_clock_data user_ns; | |
3139 | u64 now_ns; | |
3140 | ||
3141 | ktime_get_ts(&now); | |
3142 | now_ns = timespec_to_ns(&now); | |
3143 | user_ns.clock = kvm->arch.kvmclock_offset + now_ns; | |
3144 | user_ns.flags = 0; | |
3145 | ||
3146 | r = -EFAULT; | |
3147 | if (copy_to_user(argp, &user_ns, sizeof(user_ns))) | |
3148 | goto out; | |
3149 | r = 0; | |
3150 | break; | |
3151 | } | |
3152 | ||
1fe779f8 CO |
3153 | default: |
3154 | ; | |
3155 | } | |
3156 | out: | |
3157 | return r; | |
3158 | } | |
3159 | ||
a16b043c | 3160 | static void kvm_init_msr_list(void) |
043405e1 CO |
3161 | { |
3162 | u32 dummy[2]; | |
3163 | unsigned i, j; | |
3164 | ||
e3267cbb GC |
3165 | /* skip the first msrs in the list. KVM-specific */ |
3166 | for (i = j = KVM_SAVE_MSRS_BEGIN; i < ARRAY_SIZE(msrs_to_save); i++) { | |
043405e1 CO |
3167 | if (rdmsr_safe(msrs_to_save[i], &dummy[0], &dummy[1]) < 0) |
3168 | continue; | |
3169 | if (j < i) | |
3170 | msrs_to_save[j] = msrs_to_save[i]; | |
3171 | j++; | |
3172 | } | |
3173 | num_msrs_to_save = j; | |
3174 | } | |
3175 | ||
bda9020e MT |
3176 | static int vcpu_mmio_write(struct kvm_vcpu *vcpu, gpa_t addr, int len, |
3177 | const void *v) | |
bbd9b64e | 3178 | { |
bda9020e MT |
3179 | if (vcpu->arch.apic && |
3180 | !kvm_iodevice_write(&vcpu->arch.apic->dev, addr, len, v)) | |
3181 | return 0; | |
bbd9b64e | 3182 | |
e93f8a0f | 3183 | return kvm_io_bus_write(vcpu->kvm, KVM_MMIO_BUS, addr, len, v); |
bbd9b64e CO |
3184 | } |
3185 | ||
bda9020e | 3186 | static int vcpu_mmio_read(struct kvm_vcpu *vcpu, gpa_t addr, int len, void *v) |
bbd9b64e | 3187 | { |
bda9020e MT |
3188 | if (vcpu->arch.apic && |
3189 | !kvm_iodevice_read(&vcpu->arch.apic->dev, addr, len, v)) | |
3190 | return 0; | |
bbd9b64e | 3191 | |
e93f8a0f | 3192 | return kvm_io_bus_read(vcpu->kvm, KVM_MMIO_BUS, addr, len, v); |
bbd9b64e CO |
3193 | } |
3194 | ||
2dafc6c2 GN |
3195 | static void kvm_set_segment(struct kvm_vcpu *vcpu, |
3196 | struct kvm_segment *var, int seg) | |
3197 | { | |
3198 | kvm_x86_ops->set_segment(vcpu, var, seg); | |
3199 | } | |
3200 | ||
3201 | void kvm_get_segment(struct kvm_vcpu *vcpu, | |
3202 | struct kvm_segment *var, int seg) | |
3203 | { | |
3204 | kvm_x86_ops->get_segment(vcpu, var, seg); | |
3205 | } | |
3206 | ||
1871c602 GN |
3207 | gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva, u32 *error) |
3208 | { | |
3209 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
3210 | return vcpu->arch.mmu.gva_to_gpa(vcpu, gva, access, error); | |
3211 | } | |
3212 | ||
3213 | gpa_t kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu *vcpu, gva_t gva, u32 *error) | |
3214 | { | |
3215 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
3216 | access |= PFERR_FETCH_MASK; | |
3217 | return vcpu->arch.mmu.gva_to_gpa(vcpu, gva, access, error); | |
3218 | } | |
3219 | ||
3220 | gpa_t kvm_mmu_gva_to_gpa_write(struct kvm_vcpu *vcpu, gva_t gva, u32 *error) | |
3221 | { | |
3222 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
3223 | access |= PFERR_WRITE_MASK; | |
3224 | return vcpu->arch.mmu.gva_to_gpa(vcpu, gva, access, error); | |
3225 | } | |
3226 | ||
3227 | /* uses this to access any guest's mapped memory without checking CPL */ | |
3228 | gpa_t kvm_mmu_gva_to_gpa_system(struct kvm_vcpu *vcpu, gva_t gva, u32 *error) | |
3229 | { | |
3230 | return vcpu->arch.mmu.gva_to_gpa(vcpu, gva, 0, error); | |
3231 | } | |
3232 | ||
3233 | static int kvm_read_guest_virt_helper(gva_t addr, void *val, unsigned int bytes, | |
3234 | struct kvm_vcpu *vcpu, u32 access, | |
3235 | u32 *error) | |
bbd9b64e CO |
3236 | { |
3237 | void *data = val; | |
10589a46 | 3238 | int r = X86EMUL_CONTINUE; |
bbd9b64e CO |
3239 | |
3240 | while (bytes) { | |
1871c602 | 3241 | gpa_t gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr, access, error); |
bbd9b64e | 3242 | unsigned offset = addr & (PAGE_SIZE-1); |
77c2002e | 3243 | unsigned toread = min(bytes, (unsigned)PAGE_SIZE - offset); |
bbd9b64e CO |
3244 | int ret; |
3245 | ||
10589a46 MT |
3246 | if (gpa == UNMAPPED_GVA) { |
3247 | r = X86EMUL_PROPAGATE_FAULT; | |
3248 | goto out; | |
3249 | } | |
77c2002e | 3250 | ret = kvm_read_guest(vcpu->kvm, gpa, data, toread); |
10589a46 | 3251 | if (ret < 0) { |
c3cd7ffa | 3252 | r = X86EMUL_IO_NEEDED; |
10589a46 MT |
3253 | goto out; |
3254 | } | |
bbd9b64e | 3255 | |
77c2002e IE |
3256 | bytes -= toread; |
3257 | data += toread; | |
3258 | addr += toread; | |
bbd9b64e | 3259 | } |
10589a46 | 3260 | out: |
10589a46 | 3261 | return r; |
bbd9b64e | 3262 | } |
77c2002e | 3263 | |
1871c602 GN |
3264 | /* used for instruction fetching */ |
3265 | static int kvm_fetch_guest_virt(gva_t addr, void *val, unsigned int bytes, | |
3266 | struct kvm_vcpu *vcpu, u32 *error) | |
3267 | { | |
3268 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
3269 | return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, | |
3270 | access | PFERR_FETCH_MASK, error); | |
3271 | } | |
3272 | ||
3273 | static int kvm_read_guest_virt(gva_t addr, void *val, unsigned int bytes, | |
3274 | struct kvm_vcpu *vcpu, u32 *error) | |
3275 | { | |
3276 | u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; | |
3277 | return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, access, | |
3278 | error); | |
3279 | } | |
3280 | ||
3281 | static int kvm_read_guest_virt_system(gva_t addr, void *val, unsigned int bytes, | |
3282 | struct kvm_vcpu *vcpu, u32 *error) | |
3283 | { | |
3284 | return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, 0, error); | |
3285 | } | |
3286 | ||
7972995b | 3287 | static int kvm_write_guest_virt_system(gva_t addr, void *val, |
2dafc6c2 | 3288 | unsigned int bytes, |
7972995b | 3289 | struct kvm_vcpu *vcpu, |
2dafc6c2 | 3290 | u32 *error) |
77c2002e IE |
3291 | { |
3292 | void *data = val; | |
3293 | int r = X86EMUL_CONTINUE; | |
3294 | ||
3295 | while (bytes) { | |
7972995b GN |
3296 | gpa_t gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr, |
3297 | PFERR_WRITE_MASK, error); | |
77c2002e IE |
3298 | unsigned offset = addr & (PAGE_SIZE-1); |
3299 | unsigned towrite = min(bytes, (unsigned)PAGE_SIZE - offset); | |
3300 | int ret; | |
3301 | ||
3302 | if (gpa == UNMAPPED_GVA) { | |
3303 | r = X86EMUL_PROPAGATE_FAULT; | |
3304 | goto out; | |
3305 | } | |
3306 | ret = kvm_write_guest(vcpu->kvm, gpa, data, towrite); | |
3307 | if (ret < 0) { | |
c3cd7ffa | 3308 | r = X86EMUL_IO_NEEDED; |
77c2002e IE |
3309 | goto out; |
3310 | } | |
3311 | ||
3312 | bytes -= towrite; | |
3313 | data += towrite; | |
3314 | addr += towrite; | |
3315 | } | |
3316 | out: | |
3317 | return r; | |
3318 | } | |
3319 | ||
bbd9b64e CO |
3320 | static int emulator_read_emulated(unsigned long addr, |
3321 | void *val, | |
3322 | unsigned int bytes, | |
8fe681e9 | 3323 | unsigned int *error_code, |
bbd9b64e CO |
3324 | struct kvm_vcpu *vcpu) |
3325 | { | |
bbd9b64e CO |
3326 | gpa_t gpa; |
3327 | ||
3328 | if (vcpu->mmio_read_completed) { | |
3329 | memcpy(val, vcpu->mmio_data, bytes); | |
aec51dc4 AK |
3330 | trace_kvm_mmio(KVM_TRACE_MMIO_READ, bytes, |
3331 | vcpu->mmio_phys_addr, *(u64 *)val); | |
bbd9b64e CO |
3332 | vcpu->mmio_read_completed = 0; |
3333 | return X86EMUL_CONTINUE; | |
3334 | } | |
3335 | ||
8fe681e9 | 3336 | gpa = kvm_mmu_gva_to_gpa_read(vcpu, addr, error_code); |
1871c602 | 3337 | |
8fe681e9 | 3338 | if (gpa == UNMAPPED_GVA) |
1871c602 | 3339 | return X86EMUL_PROPAGATE_FAULT; |
bbd9b64e CO |
3340 | |
3341 | /* For APIC access vmexit */ | |
3342 | if ((gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) | |
3343 | goto mmio; | |
3344 | ||
1871c602 | 3345 | if (kvm_read_guest_virt(addr, val, bytes, vcpu, NULL) |
77c2002e | 3346 | == X86EMUL_CONTINUE) |
bbd9b64e | 3347 | return X86EMUL_CONTINUE; |
bbd9b64e CO |
3348 | |
3349 | mmio: | |
3350 | /* | |
3351 | * Is this MMIO handled locally? | |
3352 | */ | |
aec51dc4 AK |
3353 | if (!vcpu_mmio_read(vcpu, gpa, bytes, val)) { |
3354 | trace_kvm_mmio(KVM_TRACE_MMIO_READ, bytes, gpa, *(u64 *)val); | |
bbd9b64e CO |
3355 | return X86EMUL_CONTINUE; |
3356 | } | |
aec51dc4 AK |
3357 | |
3358 | trace_kvm_mmio(KVM_TRACE_MMIO_READ_UNSATISFIED, bytes, gpa, 0); | |
bbd9b64e CO |
3359 | |
3360 | vcpu->mmio_needed = 1; | |
411c35b7 GN |
3361 | vcpu->run->exit_reason = KVM_EXIT_MMIO; |
3362 | vcpu->run->mmio.phys_addr = vcpu->mmio_phys_addr = gpa; | |
3363 | vcpu->run->mmio.len = vcpu->mmio_size = bytes; | |
3364 | vcpu->run->mmio.is_write = vcpu->mmio_is_write = 0; | |
bbd9b64e | 3365 | |
c3cd7ffa | 3366 | return X86EMUL_IO_NEEDED; |
bbd9b64e CO |
3367 | } |
3368 | ||
3200f405 | 3369 | int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa, |
9f811285 | 3370 | const void *val, int bytes) |
bbd9b64e CO |
3371 | { |
3372 | int ret; | |
3373 | ||
3374 | ret = kvm_write_guest(vcpu->kvm, gpa, val, bytes); | |
9f811285 | 3375 | if (ret < 0) |
bbd9b64e | 3376 | return 0; |
ad218f85 | 3377 | kvm_mmu_pte_write(vcpu, gpa, val, bytes, 1); |
bbd9b64e CO |
3378 | return 1; |
3379 | } | |
3380 | ||
3381 | static int emulator_write_emulated_onepage(unsigned long addr, | |
3382 | const void *val, | |
3383 | unsigned int bytes, | |
8fe681e9 | 3384 | unsigned int *error_code, |
bbd9b64e CO |
3385 | struct kvm_vcpu *vcpu) |
3386 | { | |
10589a46 MT |
3387 | gpa_t gpa; |
3388 | ||
8fe681e9 | 3389 | gpa = kvm_mmu_gva_to_gpa_write(vcpu, addr, error_code); |
bbd9b64e | 3390 | |
8fe681e9 | 3391 | if (gpa == UNMAPPED_GVA) |
bbd9b64e | 3392 | return X86EMUL_PROPAGATE_FAULT; |
bbd9b64e CO |
3393 | |
3394 | /* For APIC access vmexit */ | |
3395 | if ((gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) | |
3396 | goto mmio; | |
3397 | ||
3398 | if (emulator_write_phys(vcpu, gpa, val, bytes)) | |
3399 | return X86EMUL_CONTINUE; | |
3400 | ||
3401 | mmio: | |
aec51dc4 | 3402 | trace_kvm_mmio(KVM_TRACE_MMIO_WRITE, bytes, gpa, *(u64 *)val); |
bbd9b64e CO |
3403 | /* |
3404 | * Is this MMIO handled locally? | |
3405 | */ | |
bda9020e | 3406 | if (!vcpu_mmio_write(vcpu, gpa, bytes, val)) |
bbd9b64e | 3407 | return X86EMUL_CONTINUE; |
bbd9b64e CO |
3408 | |
3409 | vcpu->mmio_needed = 1; | |
411c35b7 GN |
3410 | vcpu->run->exit_reason = KVM_EXIT_MMIO; |
3411 | vcpu->run->mmio.phys_addr = vcpu->mmio_phys_addr = gpa; | |
3412 | vcpu->run->mmio.len = vcpu->mmio_size = bytes; | |
3413 | vcpu->run->mmio.is_write = vcpu->mmio_is_write = 1; | |
3414 | memcpy(vcpu->run->mmio.data, val, bytes); | |
bbd9b64e CO |
3415 | |
3416 | return X86EMUL_CONTINUE; | |
3417 | } | |
3418 | ||
3419 | int emulator_write_emulated(unsigned long addr, | |
8f6abd06 GN |
3420 | const void *val, |
3421 | unsigned int bytes, | |
8fe681e9 | 3422 | unsigned int *error_code, |
8f6abd06 | 3423 | struct kvm_vcpu *vcpu) |
bbd9b64e CO |
3424 | { |
3425 | /* Crossing a page boundary? */ | |
3426 | if (((addr + bytes - 1) ^ addr) & PAGE_MASK) { | |
3427 | int rc, now; | |
3428 | ||
3429 | now = -addr & ~PAGE_MASK; | |
8fe681e9 GN |
3430 | rc = emulator_write_emulated_onepage(addr, val, now, error_code, |
3431 | vcpu); | |
bbd9b64e CO |
3432 | if (rc != X86EMUL_CONTINUE) |
3433 | return rc; | |
3434 | addr += now; | |
3435 | val += now; | |
3436 | bytes -= now; | |
3437 | } | |
8fe681e9 GN |
3438 | return emulator_write_emulated_onepage(addr, val, bytes, error_code, |
3439 | vcpu); | |
bbd9b64e | 3440 | } |
bbd9b64e | 3441 | |
daea3e73 AK |
3442 | #define CMPXCHG_TYPE(t, ptr, old, new) \ |
3443 | (cmpxchg((t *)(ptr), *(t *)(old), *(t *)(new)) == *(t *)(old)) | |
3444 | ||
3445 | #ifdef CONFIG_X86_64 | |
3446 | # define CMPXCHG64(ptr, old, new) CMPXCHG_TYPE(u64, ptr, old, new) | |
3447 | #else | |
3448 | # define CMPXCHG64(ptr, old, new) \ | |
9749a6c0 | 3449 | (cmpxchg64((u64 *)(ptr), *(u64 *)(old), *(u64 *)(new)) == *(u64 *)(old)) |
daea3e73 AK |
3450 | #endif |
3451 | ||
bbd9b64e CO |
3452 | static int emulator_cmpxchg_emulated(unsigned long addr, |
3453 | const void *old, | |
3454 | const void *new, | |
3455 | unsigned int bytes, | |
8fe681e9 | 3456 | unsigned int *error_code, |
bbd9b64e CO |
3457 | struct kvm_vcpu *vcpu) |
3458 | { | |
daea3e73 AK |
3459 | gpa_t gpa; |
3460 | struct page *page; | |
3461 | char *kaddr; | |
3462 | bool exchanged; | |
2bacc55c | 3463 | |
daea3e73 AK |
3464 | /* guests cmpxchg8b have to be emulated atomically */ |
3465 | if (bytes > 8 || (bytes & (bytes - 1))) | |
3466 | goto emul_write; | |
10589a46 | 3467 | |
daea3e73 | 3468 | gpa = kvm_mmu_gva_to_gpa_write(vcpu, addr, NULL); |
2bacc55c | 3469 | |
daea3e73 AK |
3470 | if (gpa == UNMAPPED_GVA || |
3471 | (gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) | |
3472 | goto emul_write; | |
2bacc55c | 3473 | |
daea3e73 AK |
3474 | if (((gpa + bytes - 1) & PAGE_MASK) != (gpa & PAGE_MASK)) |
3475 | goto emul_write; | |
72dc67a6 | 3476 | |
daea3e73 | 3477 | page = gfn_to_page(vcpu->kvm, gpa >> PAGE_SHIFT); |
72dc67a6 | 3478 | |
daea3e73 AK |
3479 | kaddr = kmap_atomic(page, KM_USER0); |
3480 | kaddr += offset_in_page(gpa); | |
3481 | switch (bytes) { | |
3482 | case 1: | |
3483 | exchanged = CMPXCHG_TYPE(u8, kaddr, old, new); | |
3484 | break; | |
3485 | case 2: | |
3486 | exchanged = CMPXCHG_TYPE(u16, kaddr, old, new); | |
3487 | break; | |
3488 | case 4: | |
3489 | exchanged = CMPXCHG_TYPE(u32, kaddr, old, new); | |
3490 | break; | |
3491 | case 8: | |
3492 | exchanged = CMPXCHG64(kaddr, old, new); | |
3493 | break; | |
3494 | default: | |
3495 | BUG(); | |
2bacc55c | 3496 | } |
daea3e73 AK |
3497 | kunmap_atomic(kaddr, KM_USER0); |
3498 | kvm_release_page_dirty(page); | |
3499 | ||
3500 | if (!exchanged) | |
3501 | return X86EMUL_CMPXCHG_FAILED; | |
3502 | ||
8f6abd06 GN |
3503 | kvm_mmu_pte_write(vcpu, gpa, new, bytes, 1); |
3504 | ||
3505 | return X86EMUL_CONTINUE; | |
4a5f48f6 | 3506 | |
3200f405 | 3507 | emul_write: |
daea3e73 | 3508 | printk_once(KERN_WARNING "kvm: emulating exchange as write\n"); |
2bacc55c | 3509 | |
8fe681e9 | 3510 | return emulator_write_emulated(addr, new, bytes, error_code, vcpu); |
bbd9b64e CO |
3511 | } |
3512 | ||
cf8f70bf GN |
3513 | static int kernel_pio(struct kvm_vcpu *vcpu, void *pd) |
3514 | { | |
3515 | /* TODO: String I/O for in kernel device */ | |
3516 | int r; | |
3517 | ||
3518 | if (vcpu->arch.pio.in) | |
3519 | r = kvm_io_bus_read(vcpu->kvm, KVM_PIO_BUS, vcpu->arch.pio.port, | |
3520 | vcpu->arch.pio.size, pd); | |
3521 | else | |
3522 | r = kvm_io_bus_write(vcpu->kvm, KVM_PIO_BUS, | |
3523 | vcpu->arch.pio.port, vcpu->arch.pio.size, | |
3524 | pd); | |
3525 | return r; | |
3526 | } | |
3527 | ||
3528 | ||
3529 | static int emulator_pio_in_emulated(int size, unsigned short port, void *val, | |
3530 | unsigned int count, struct kvm_vcpu *vcpu) | |
3531 | { | |
7972995b | 3532 | if (vcpu->arch.pio.count) |
cf8f70bf GN |
3533 | goto data_avail; |
3534 | ||
3535 | trace_kvm_pio(1, port, size, 1); | |
3536 | ||
3537 | vcpu->arch.pio.port = port; | |
3538 | vcpu->arch.pio.in = 1; | |
7972995b | 3539 | vcpu->arch.pio.count = count; |
cf8f70bf GN |
3540 | vcpu->arch.pio.size = size; |
3541 | ||
3542 | if (!kernel_pio(vcpu, vcpu->arch.pio_data)) { | |
3543 | data_avail: | |
3544 | memcpy(val, vcpu->arch.pio_data, size * count); | |
7972995b | 3545 | vcpu->arch.pio.count = 0; |
cf8f70bf GN |
3546 | return 1; |
3547 | } | |
3548 | ||
3549 | vcpu->run->exit_reason = KVM_EXIT_IO; | |
3550 | vcpu->run->io.direction = KVM_EXIT_IO_IN; | |
3551 | vcpu->run->io.size = size; | |
3552 | vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE; | |
3553 | vcpu->run->io.count = count; | |
3554 | vcpu->run->io.port = port; | |
3555 | ||
3556 | return 0; | |
3557 | } | |
3558 | ||
3559 | static int emulator_pio_out_emulated(int size, unsigned short port, | |
3560 | const void *val, unsigned int count, | |
3561 | struct kvm_vcpu *vcpu) | |
3562 | { | |
3563 | trace_kvm_pio(0, port, size, 1); | |
3564 | ||
3565 | vcpu->arch.pio.port = port; | |
3566 | vcpu->arch.pio.in = 0; | |
7972995b | 3567 | vcpu->arch.pio.count = count; |
cf8f70bf GN |
3568 | vcpu->arch.pio.size = size; |
3569 | ||
3570 | memcpy(vcpu->arch.pio_data, val, size * count); | |
3571 | ||
3572 | if (!kernel_pio(vcpu, vcpu->arch.pio_data)) { | |
7972995b | 3573 | vcpu->arch.pio.count = 0; |
cf8f70bf GN |
3574 | return 1; |
3575 | } | |
3576 | ||
3577 | vcpu->run->exit_reason = KVM_EXIT_IO; | |
3578 | vcpu->run->io.direction = KVM_EXIT_IO_OUT; | |
3579 | vcpu->run->io.size = size; | |
3580 | vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE; | |
3581 | vcpu->run->io.count = count; | |
3582 | vcpu->run->io.port = port; | |
3583 | ||
3584 | return 0; | |
3585 | } | |
3586 | ||
bbd9b64e CO |
3587 | static unsigned long get_segment_base(struct kvm_vcpu *vcpu, int seg) |
3588 | { | |
3589 | return kvm_x86_ops->get_segment_base(vcpu, seg); | |
3590 | } | |
3591 | ||
3592 | int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address) | |
3593 | { | |
a7052897 | 3594 | kvm_mmu_invlpg(vcpu, address); |
bbd9b64e CO |
3595 | return X86EMUL_CONTINUE; |
3596 | } | |
3597 | ||
3598 | int emulate_clts(struct kvm_vcpu *vcpu) | |
3599 | { | |
4d4ec087 | 3600 | kvm_x86_ops->set_cr0(vcpu, kvm_read_cr0_bits(vcpu, ~X86_CR0_TS)); |
6b52d186 | 3601 | kvm_x86_ops->fpu_activate(vcpu); |
bbd9b64e CO |
3602 | return X86EMUL_CONTINUE; |
3603 | } | |
3604 | ||
35aa5375 | 3605 | int emulator_get_dr(int dr, unsigned long *dest, struct kvm_vcpu *vcpu) |
bbd9b64e | 3606 | { |
338dbc97 | 3607 | return _kvm_get_dr(vcpu, dr, dest); |
bbd9b64e CO |
3608 | } |
3609 | ||
35aa5375 | 3610 | int emulator_set_dr(int dr, unsigned long value, struct kvm_vcpu *vcpu) |
bbd9b64e | 3611 | { |
338dbc97 GN |
3612 | |
3613 | return __kvm_set_dr(vcpu, dr, value); | |
bbd9b64e CO |
3614 | } |
3615 | ||
52a46617 | 3616 | static u64 mk_cr_64(u64 curr_cr, u32 new_val) |
5fdbf976 | 3617 | { |
52a46617 | 3618 | return (curr_cr & ~((1ULL << 32) - 1)) | new_val; |
5fdbf976 MT |
3619 | } |
3620 | ||
52a46617 | 3621 | static unsigned long emulator_get_cr(int cr, struct kvm_vcpu *vcpu) |
bbd9b64e | 3622 | { |
52a46617 GN |
3623 | unsigned long value; |
3624 | ||
3625 | switch (cr) { | |
3626 | case 0: | |
3627 | value = kvm_read_cr0(vcpu); | |
3628 | break; | |
3629 | case 2: | |
3630 | value = vcpu->arch.cr2; | |
3631 | break; | |
3632 | case 3: | |
3633 | value = vcpu->arch.cr3; | |
3634 | break; | |
3635 | case 4: | |
3636 | value = kvm_read_cr4(vcpu); | |
3637 | break; | |
3638 | case 8: | |
3639 | value = kvm_get_cr8(vcpu); | |
3640 | break; | |
3641 | default: | |
3642 | vcpu_printf(vcpu, "%s: unexpected cr %u\n", __func__, cr); | |
3643 | return 0; | |
3644 | } | |
3645 | ||
3646 | return value; | |
3647 | } | |
3648 | ||
0f12244f | 3649 | static int emulator_set_cr(int cr, unsigned long val, struct kvm_vcpu *vcpu) |
52a46617 | 3650 | { |
0f12244f GN |
3651 | int res = 0; |
3652 | ||
52a46617 GN |
3653 | switch (cr) { |
3654 | case 0: | |
0f12244f | 3655 | res = __kvm_set_cr0(vcpu, mk_cr_64(kvm_read_cr0(vcpu), val)); |
52a46617 GN |
3656 | break; |
3657 | case 2: | |
3658 | vcpu->arch.cr2 = val; | |
3659 | break; | |
3660 | case 3: | |
0f12244f | 3661 | res = __kvm_set_cr3(vcpu, val); |
52a46617 GN |
3662 | break; |
3663 | case 4: | |
0f12244f | 3664 | res = __kvm_set_cr4(vcpu, mk_cr_64(kvm_read_cr4(vcpu), val)); |
52a46617 GN |
3665 | break; |
3666 | case 8: | |
0f12244f | 3667 | res = __kvm_set_cr8(vcpu, val & 0xfUL); |
52a46617 GN |
3668 | break; |
3669 | default: | |
3670 | vcpu_printf(vcpu, "%s: unexpected cr %u\n", __func__, cr); | |
0f12244f | 3671 | res = -1; |
52a46617 | 3672 | } |
0f12244f GN |
3673 | |
3674 | return res; | |
52a46617 GN |
3675 | } |
3676 | ||
9c537244 GN |
3677 | static int emulator_get_cpl(struct kvm_vcpu *vcpu) |
3678 | { | |
3679 | return kvm_x86_ops->get_cpl(vcpu); | |
3680 | } | |
3681 | ||
2dafc6c2 GN |
3682 | static void emulator_get_gdt(struct desc_ptr *dt, struct kvm_vcpu *vcpu) |
3683 | { | |
3684 | kvm_x86_ops->get_gdt(vcpu, dt); | |
3685 | } | |
3686 | ||
5951c442 GN |
3687 | static unsigned long emulator_get_cached_segment_base(int seg, |
3688 | struct kvm_vcpu *vcpu) | |
3689 | { | |
3690 | return get_segment_base(vcpu, seg); | |
3691 | } | |
3692 | ||
2dafc6c2 GN |
3693 | static bool emulator_get_cached_descriptor(struct desc_struct *desc, int seg, |
3694 | struct kvm_vcpu *vcpu) | |
3695 | { | |
3696 | struct kvm_segment var; | |
3697 | ||
3698 | kvm_get_segment(vcpu, &var, seg); | |
3699 | ||
3700 | if (var.unusable) | |
3701 | return false; | |
3702 | ||
3703 | if (var.g) | |
3704 | var.limit >>= 12; | |
3705 | set_desc_limit(desc, var.limit); | |
3706 | set_desc_base(desc, (unsigned long)var.base); | |
3707 | desc->type = var.type; | |
3708 | desc->s = var.s; | |
3709 | desc->dpl = var.dpl; | |
3710 | desc->p = var.present; | |
3711 | desc->avl = var.avl; | |
3712 | desc->l = var.l; | |
3713 | desc->d = var.db; | |
3714 | desc->g = var.g; | |
3715 | ||
3716 | return true; | |
3717 | } | |
3718 | ||
3719 | static void emulator_set_cached_descriptor(struct desc_struct *desc, int seg, | |
3720 | struct kvm_vcpu *vcpu) | |
3721 | { | |
3722 | struct kvm_segment var; | |
3723 | ||
3724 | /* needed to preserve selector */ | |
3725 | kvm_get_segment(vcpu, &var, seg); | |
3726 | ||
3727 | var.base = get_desc_base(desc); | |
3728 | var.limit = get_desc_limit(desc); | |
3729 | if (desc->g) | |
3730 | var.limit = (var.limit << 12) | 0xfff; | |
3731 | var.type = desc->type; | |
3732 | var.present = desc->p; | |
3733 | var.dpl = desc->dpl; | |
3734 | var.db = desc->d; | |
3735 | var.s = desc->s; | |
3736 | var.l = desc->l; | |
3737 | var.g = desc->g; | |
3738 | var.avl = desc->avl; | |
3739 | var.present = desc->p; | |
3740 | var.unusable = !var.present; | |
3741 | var.padding = 0; | |
3742 | ||
3743 | kvm_set_segment(vcpu, &var, seg); | |
3744 | return; | |
3745 | } | |
3746 | ||
3747 | static u16 emulator_get_segment_selector(int seg, struct kvm_vcpu *vcpu) | |
3748 | { | |
3749 | struct kvm_segment kvm_seg; | |
3750 | ||
3751 | kvm_get_segment(vcpu, &kvm_seg, seg); | |
3752 | return kvm_seg.selector; | |
3753 | } | |
3754 | ||
3755 | static void emulator_set_segment_selector(u16 sel, int seg, | |
3756 | struct kvm_vcpu *vcpu) | |
3757 | { | |
3758 | struct kvm_segment kvm_seg; | |
3759 | ||
3760 | kvm_get_segment(vcpu, &kvm_seg, seg); | |
3761 | kvm_seg.selector = sel; | |
3762 | kvm_set_segment(vcpu, &kvm_seg, seg); | |
3763 | } | |
3764 | ||
14af3f3c | 3765 | static struct x86_emulate_ops emulate_ops = { |
1871c602 | 3766 | .read_std = kvm_read_guest_virt_system, |
2dafc6c2 | 3767 | .write_std = kvm_write_guest_virt_system, |
1871c602 | 3768 | .fetch = kvm_fetch_guest_virt, |
bbd9b64e CO |
3769 | .read_emulated = emulator_read_emulated, |
3770 | .write_emulated = emulator_write_emulated, | |
3771 | .cmpxchg_emulated = emulator_cmpxchg_emulated, | |
cf8f70bf GN |
3772 | .pio_in_emulated = emulator_pio_in_emulated, |
3773 | .pio_out_emulated = emulator_pio_out_emulated, | |
2dafc6c2 GN |
3774 | .get_cached_descriptor = emulator_get_cached_descriptor, |
3775 | .set_cached_descriptor = emulator_set_cached_descriptor, | |
3776 | .get_segment_selector = emulator_get_segment_selector, | |
3777 | .set_segment_selector = emulator_set_segment_selector, | |
5951c442 | 3778 | .get_cached_segment_base = emulator_get_cached_segment_base, |
2dafc6c2 | 3779 | .get_gdt = emulator_get_gdt, |
52a46617 GN |
3780 | .get_cr = emulator_get_cr, |
3781 | .set_cr = emulator_set_cr, | |
9c537244 | 3782 | .cpl = emulator_get_cpl, |
35aa5375 GN |
3783 | .get_dr = emulator_get_dr, |
3784 | .set_dr = emulator_set_dr, | |
3fb1b5db GN |
3785 | .set_msr = kvm_set_msr, |
3786 | .get_msr = kvm_get_msr, | |
bbd9b64e CO |
3787 | }; |
3788 | ||
5fdbf976 MT |
3789 | static void cache_all_regs(struct kvm_vcpu *vcpu) |
3790 | { | |
3791 | kvm_register_read(vcpu, VCPU_REGS_RAX); | |
3792 | kvm_register_read(vcpu, VCPU_REGS_RSP); | |
3793 | kvm_register_read(vcpu, VCPU_REGS_RIP); | |
3794 | vcpu->arch.regs_dirty = ~0; | |
3795 | } | |
3796 | ||
95cb2295 GN |
3797 | static void toggle_interruptibility(struct kvm_vcpu *vcpu, u32 mask) |
3798 | { | |
3799 | u32 int_shadow = kvm_x86_ops->get_interrupt_shadow(vcpu, mask); | |
3800 | /* | |
3801 | * an sti; sti; sequence only disable interrupts for the first | |
3802 | * instruction. So, if the last instruction, be it emulated or | |
3803 | * not, left the system with the INT_STI flag enabled, it | |
3804 | * means that the last instruction is an sti. We should not | |
3805 | * leave the flag on in this case. The same goes for mov ss | |
3806 | */ | |
3807 | if (!(int_shadow & mask)) | |
3808 | kvm_x86_ops->set_interrupt_shadow(vcpu, mask); | |
3809 | } | |
3810 | ||
54b8486f GN |
3811 | static void inject_emulated_exception(struct kvm_vcpu *vcpu) |
3812 | { | |
3813 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; | |
3814 | if (ctxt->exception == PF_VECTOR) | |
3815 | kvm_inject_page_fault(vcpu, ctxt->cr2, ctxt->error_code); | |
3816 | else if (ctxt->error_code_valid) | |
3817 | kvm_queue_exception_e(vcpu, ctxt->exception, ctxt->error_code); | |
3818 | else | |
3819 | kvm_queue_exception(vcpu, ctxt->exception); | |
3820 | } | |
3821 | ||
6d77dbfc GN |
3822 | static int handle_emulation_failure(struct kvm_vcpu *vcpu) |
3823 | { | |
6d77dbfc GN |
3824 | ++vcpu->stat.insn_emulation_fail; |
3825 | trace_kvm_emulate_insn_failed(vcpu); | |
3826 | vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR; | |
3827 | vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION; | |
3828 | vcpu->run->internal.ndata = 0; | |
3829 | kvm_queue_exception(vcpu, UD_VECTOR); | |
3830 | return EMULATE_FAIL; | |
3831 | } | |
3832 | ||
bbd9b64e | 3833 | int emulate_instruction(struct kvm_vcpu *vcpu, |
bbd9b64e CO |
3834 | unsigned long cr2, |
3835 | u16 error_code, | |
571008da | 3836 | int emulation_type) |
bbd9b64e | 3837 | { |
95cb2295 | 3838 | int r; |
4d2179e1 | 3839 | struct decode_cache *c = &vcpu->arch.emulate_ctxt.decode; |
bbd9b64e | 3840 | |
26eef70c | 3841 | kvm_clear_exception_queue(vcpu); |
ad312c7c | 3842 | vcpu->arch.mmio_fault_cr2 = cr2; |
5fdbf976 | 3843 | /* |
56e82318 | 3844 | * TODO: fix emulate.c to use guest_read/write_register |
5fdbf976 MT |
3845 | * instead of direct ->regs accesses, can save hundred cycles |
3846 | * on Intel for instructions that don't read/change RSP, for | |
3847 | * for example. | |
3848 | */ | |
3849 | cache_all_regs(vcpu); | |
bbd9b64e | 3850 | |
571008da | 3851 | if (!(emulation_type & EMULTYPE_NO_DECODE)) { |
bbd9b64e CO |
3852 | int cs_db, cs_l; |
3853 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); | |
3854 | ||
ad312c7c | 3855 | vcpu->arch.emulate_ctxt.vcpu = vcpu; |
83bf0002 | 3856 | vcpu->arch.emulate_ctxt.eflags = kvm_x86_ops->get_rflags(vcpu); |
063db061 | 3857 | vcpu->arch.emulate_ctxt.eip = kvm_rip_read(vcpu); |
ad312c7c | 3858 | vcpu->arch.emulate_ctxt.mode = |
a0044755 | 3859 | (!is_protmode(vcpu)) ? X86EMUL_MODE_REAL : |
ad312c7c | 3860 | (vcpu->arch.emulate_ctxt.eflags & X86_EFLAGS_VM) |
a0044755 | 3861 | ? X86EMUL_MODE_VM86 : cs_l |
bbd9b64e CO |
3862 | ? X86EMUL_MODE_PROT64 : cs_db |
3863 | ? X86EMUL_MODE_PROT32 : X86EMUL_MODE_PROT16; | |
4d2179e1 GN |
3864 | memset(c, 0, sizeof(struct decode_cache)); |
3865 | memcpy(c->regs, vcpu->arch.regs, sizeof c->regs); | |
95cb2295 | 3866 | vcpu->arch.emulate_ctxt.interruptibility = 0; |
54b8486f | 3867 | vcpu->arch.emulate_ctxt.exception = -1; |
bbd9b64e | 3868 | |
ad312c7c | 3869 | r = x86_decode_insn(&vcpu->arch.emulate_ctxt, &emulate_ops); |
e46479f8 | 3870 | trace_kvm_emulate_insn_start(vcpu); |
571008da | 3871 | |
0cb5762e AP |
3872 | /* Only allow emulation of specific instructions on #UD |
3873 | * (namely VMMCALL, sysenter, sysexit, syscall)*/ | |
0cb5762e AP |
3874 | if (emulation_type & EMULTYPE_TRAP_UD) { |
3875 | if (!c->twobyte) | |
3876 | return EMULATE_FAIL; | |
3877 | switch (c->b) { | |
3878 | case 0x01: /* VMMCALL */ | |
3879 | if (c->modrm_mod != 3 || c->modrm_rm != 1) | |
3880 | return EMULATE_FAIL; | |
3881 | break; | |
3882 | case 0x34: /* sysenter */ | |
3883 | case 0x35: /* sysexit */ | |
3884 | if (c->modrm_mod != 0 || c->modrm_rm != 0) | |
3885 | return EMULATE_FAIL; | |
3886 | break; | |
3887 | case 0x05: /* syscall */ | |
3888 | if (c->modrm_mod != 0 || c->modrm_rm != 0) | |
3889 | return EMULATE_FAIL; | |
3890 | break; | |
3891 | default: | |
3892 | return EMULATE_FAIL; | |
3893 | } | |
3894 | ||
3895 | if (!(c->modrm_reg == 0 || c->modrm_reg == 3)) | |
3896 | return EMULATE_FAIL; | |
3897 | } | |
571008da | 3898 | |
f2b5756b | 3899 | ++vcpu->stat.insn_emulation; |
bbd9b64e CO |
3900 | if (r) { |
3901 | if (kvm_mmu_unprotect_page_virt(vcpu, cr2)) | |
3902 | return EMULATE_DONE; | |
6d77dbfc GN |
3903 | if (emulation_type & EMULTYPE_SKIP) |
3904 | return EMULATE_FAIL; | |
3905 | return handle_emulation_failure(vcpu); | |
bbd9b64e CO |
3906 | } |
3907 | } | |
3908 | ||
ba8afb6b GN |
3909 | if (emulation_type & EMULTYPE_SKIP) { |
3910 | kvm_rip_write(vcpu, vcpu->arch.emulate_ctxt.decode.eip); | |
3911 | return EMULATE_DONE; | |
3912 | } | |
3913 | ||
4d2179e1 GN |
3914 | /* this is needed for vmware backdor interface to work since it |
3915 | changes registers values during IO operation */ | |
3916 | memcpy(c->regs, vcpu->arch.regs, sizeof c->regs); | |
3917 | ||
5cd21917 | 3918 | restart: |
ad312c7c | 3919 | r = x86_emulate_insn(&vcpu->arch.emulate_ctxt, &emulate_ops); |
bbd9b64e | 3920 | |
c3cd7ffa GN |
3921 | if (r) { /* emulation failed */ |
3922 | /* | |
3923 | * if emulation was due to access to shadowed page table | |
3924 | * and it failed try to unshadow page and re-entetr the | |
3925 | * guest to let CPU execute the instruction. | |
3926 | */ | |
3927 | if (kvm_mmu_unprotect_page_virt(vcpu, cr2)) | |
3928 | return EMULATE_DONE; | |
3929 | ||
6d77dbfc | 3930 | return handle_emulation_failure(vcpu); |
bbd9b64e CO |
3931 | } |
3932 | ||
95cb2295 | 3933 | toggle_interruptibility(vcpu, vcpu->arch.emulate_ctxt.interruptibility); |
ef050dc0 | 3934 | kvm_x86_ops->set_rflags(vcpu, vcpu->arch.emulate_ctxt.eflags); |
4d2179e1 | 3935 | memcpy(vcpu->arch.regs, c->regs, sizeof c->regs); |
95c55886 | 3936 | kvm_rip_write(vcpu, vcpu->arch.emulate_ctxt.eip); |
3457e419 | 3937 | |
54b8486f GN |
3938 | if (vcpu->arch.emulate_ctxt.exception >= 0) { |
3939 | inject_emulated_exception(vcpu); | |
3940 | return EMULATE_DONE; | |
3941 | } | |
3942 | ||
3457e419 GN |
3943 | if (vcpu->arch.pio.count) { |
3944 | if (!vcpu->arch.pio.in) | |
3945 | vcpu->arch.pio.count = 0; | |
3946 | return EMULATE_DO_MMIO; | |
3947 | } | |
3948 | ||
3949 | if (vcpu->mmio_needed) { | |
3950 | if (vcpu->mmio_is_write) | |
3951 | vcpu->mmio_needed = 0; | |
3952 | return EMULATE_DO_MMIO; | |
3953 | } | |
3954 | ||
5cd21917 GN |
3955 | if (vcpu->arch.emulate_ctxt.restart) |
3956 | goto restart; | |
f850e2e6 | 3957 | |
bbd9b64e | 3958 | return EMULATE_DONE; |
de7d789a | 3959 | } |
bbd9b64e | 3960 | EXPORT_SYMBOL_GPL(emulate_instruction); |
de7d789a | 3961 | |
cf8f70bf | 3962 | int kvm_fast_pio_out(struct kvm_vcpu *vcpu, int size, unsigned short port) |
de7d789a | 3963 | { |
cf8f70bf GN |
3964 | unsigned long val = kvm_register_read(vcpu, VCPU_REGS_RAX); |
3965 | int ret = emulator_pio_out_emulated(size, port, &val, 1, vcpu); | |
3966 | /* do not return to emulator after return from userspace */ | |
7972995b | 3967 | vcpu->arch.pio.count = 0; |
de7d789a CO |
3968 | return ret; |
3969 | } | |
cf8f70bf | 3970 | EXPORT_SYMBOL_GPL(kvm_fast_pio_out); |
de7d789a | 3971 | |
c8076604 GH |
3972 | static void bounce_off(void *info) |
3973 | { | |
3974 | /* nothing */ | |
3975 | } | |
3976 | ||
c8076604 GH |
3977 | static int kvmclock_cpufreq_notifier(struct notifier_block *nb, unsigned long val, |
3978 | void *data) | |
3979 | { | |
3980 | struct cpufreq_freqs *freq = data; | |
3981 | struct kvm *kvm; | |
3982 | struct kvm_vcpu *vcpu; | |
3983 | int i, send_ipi = 0; | |
3984 | ||
c8076604 GH |
3985 | if (val == CPUFREQ_PRECHANGE && freq->old > freq->new) |
3986 | return 0; | |
3987 | if (val == CPUFREQ_POSTCHANGE && freq->old < freq->new) | |
3988 | return 0; | |
0cca7907 | 3989 | per_cpu(cpu_tsc_khz, freq->cpu) = freq->new; |
c8076604 GH |
3990 | |
3991 | spin_lock(&kvm_lock); | |
3992 | list_for_each_entry(kvm, &vm_list, vm_list) { | |
988a2cae | 3993 | kvm_for_each_vcpu(i, vcpu, kvm) { |
c8076604 GH |
3994 | if (vcpu->cpu != freq->cpu) |
3995 | continue; | |
3996 | if (!kvm_request_guest_time_update(vcpu)) | |
3997 | continue; | |
3998 | if (vcpu->cpu != smp_processor_id()) | |
3999 | send_ipi++; | |
4000 | } | |
4001 | } | |
4002 | spin_unlock(&kvm_lock); | |
4003 | ||
4004 | if (freq->old < freq->new && send_ipi) { | |
4005 | /* | |
4006 | * We upscale the frequency. Must make the guest | |
4007 | * doesn't see old kvmclock values while running with | |
4008 | * the new frequency, otherwise we risk the guest sees | |
4009 | * time go backwards. | |
4010 | * | |
4011 | * In case we update the frequency for another cpu | |
4012 | * (which might be in guest context) send an interrupt | |
4013 | * to kick the cpu out of guest context. Next time | |
4014 | * guest context is entered kvmclock will be updated, | |
4015 | * so the guest will not see stale values. | |
4016 | */ | |
4017 | smp_call_function_single(freq->cpu, bounce_off, NULL, 1); | |
4018 | } | |
4019 | return 0; | |
4020 | } | |
4021 | ||
4022 | static struct notifier_block kvmclock_cpufreq_notifier_block = { | |
4023 | .notifier_call = kvmclock_cpufreq_notifier | |
4024 | }; | |
4025 | ||
b820cc0c ZA |
4026 | static void kvm_timer_init(void) |
4027 | { | |
4028 | int cpu; | |
4029 | ||
b820cc0c | 4030 | if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) { |
b820cc0c ZA |
4031 | cpufreq_register_notifier(&kvmclock_cpufreq_notifier_block, |
4032 | CPUFREQ_TRANSITION_NOTIFIER); | |
6b7d7e76 ZA |
4033 | for_each_online_cpu(cpu) { |
4034 | unsigned long khz = cpufreq_get(cpu); | |
4035 | if (!khz) | |
4036 | khz = tsc_khz; | |
4037 | per_cpu(cpu_tsc_khz, cpu) = khz; | |
4038 | } | |
0cca7907 ZA |
4039 | } else { |
4040 | for_each_possible_cpu(cpu) | |
4041 | per_cpu(cpu_tsc_khz, cpu) = tsc_khz; | |
b820cc0c ZA |
4042 | } |
4043 | } | |
4044 | ||
ff9d07a0 ZY |
4045 | static DEFINE_PER_CPU(struct kvm_vcpu *, current_vcpu); |
4046 | ||
4047 | static int kvm_is_in_guest(void) | |
4048 | { | |
4049 | return percpu_read(current_vcpu) != NULL; | |
4050 | } | |
4051 | ||
4052 | static int kvm_is_user_mode(void) | |
4053 | { | |
4054 | int user_mode = 3; | |
dcf46b94 | 4055 | |
ff9d07a0 ZY |
4056 | if (percpu_read(current_vcpu)) |
4057 | user_mode = kvm_x86_ops->get_cpl(percpu_read(current_vcpu)); | |
dcf46b94 | 4058 | |
ff9d07a0 ZY |
4059 | return user_mode != 0; |
4060 | } | |
4061 | ||
4062 | static unsigned long kvm_get_guest_ip(void) | |
4063 | { | |
4064 | unsigned long ip = 0; | |
dcf46b94 | 4065 | |
ff9d07a0 ZY |
4066 | if (percpu_read(current_vcpu)) |
4067 | ip = kvm_rip_read(percpu_read(current_vcpu)); | |
dcf46b94 | 4068 | |
ff9d07a0 ZY |
4069 | return ip; |
4070 | } | |
4071 | ||
4072 | static struct perf_guest_info_callbacks kvm_guest_cbs = { | |
4073 | .is_in_guest = kvm_is_in_guest, | |
4074 | .is_user_mode = kvm_is_user_mode, | |
4075 | .get_guest_ip = kvm_get_guest_ip, | |
4076 | }; | |
4077 | ||
4078 | void kvm_before_handle_nmi(struct kvm_vcpu *vcpu) | |
4079 | { | |
4080 | percpu_write(current_vcpu, vcpu); | |
4081 | } | |
4082 | EXPORT_SYMBOL_GPL(kvm_before_handle_nmi); | |
4083 | ||
4084 | void kvm_after_handle_nmi(struct kvm_vcpu *vcpu) | |
4085 | { | |
4086 | percpu_write(current_vcpu, NULL); | |
4087 | } | |
4088 | EXPORT_SYMBOL_GPL(kvm_after_handle_nmi); | |
4089 | ||
f8c16bba | 4090 | int kvm_arch_init(void *opaque) |
043405e1 | 4091 | { |
b820cc0c | 4092 | int r; |
f8c16bba ZX |
4093 | struct kvm_x86_ops *ops = (struct kvm_x86_ops *)opaque; |
4094 | ||
f8c16bba ZX |
4095 | if (kvm_x86_ops) { |
4096 | printk(KERN_ERR "kvm: already loaded the other module\n"); | |
56c6d28a ZX |
4097 | r = -EEXIST; |
4098 | goto out; | |
f8c16bba ZX |
4099 | } |
4100 | ||
4101 | if (!ops->cpu_has_kvm_support()) { | |
4102 | printk(KERN_ERR "kvm: no hardware support\n"); | |
56c6d28a ZX |
4103 | r = -EOPNOTSUPP; |
4104 | goto out; | |
f8c16bba ZX |
4105 | } |
4106 | if (ops->disabled_by_bios()) { | |
4107 | printk(KERN_ERR "kvm: disabled by bios\n"); | |
56c6d28a ZX |
4108 | r = -EOPNOTSUPP; |
4109 | goto out; | |
f8c16bba ZX |
4110 | } |
4111 | ||
97db56ce AK |
4112 | r = kvm_mmu_module_init(); |
4113 | if (r) | |
4114 | goto out; | |
4115 | ||
4116 | kvm_init_msr_list(); | |
4117 | ||
f8c16bba | 4118 | kvm_x86_ops = ops; |
56c6d28a | 4119 | kvm_mmu_set_nonpresent_ptes(0ull, 0ull); |
7b52345e SY |
4120 | kvm_mmu_set_base_ptes(PT_PRESENT_MASK); |
4121 | kvm_mmu_set_mask_ptes(PT_USER_MASK, PT_ACCESSED_MASK, | |
4b12f0de | 4122 | PT_DIRTY_MASK, PT64_NX_MASK, 0); |
c8076604 | 4123 | |
b820cc0c | 4124 | kvm_timer_init(); |
c8076604 | 4125 | |
ff9d07a0 ZY |
4126 | perf_register_guest_info_callbacks(&kvm_guest_cbs); |
4127 | ||
f8c16bba | 4128 | return 0; |
56c6d28a ZX |
4129 | |
4130 | out: | |
56c6d28a | 4131 | return r; |
043405e1 | 4132 | } |
8776e519 | 4133 | |
f8c16bba ZX |
4134 | void kvm_arch_exit(void) |
4135 | { | |
ff9d07a0 ZY |
4136 | perf_unregister_guest_info_callbacks(&kvm_guest_cbs); |
4137 | ||
888d256e JK |
4138 | if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) |
4139 | cpufreq_unregister_notifier(&kvmclock_cpufreq_notifier_block, | |
4140 | CPUFREQ_TRANSITION_NOTIFIER); | |
f8c16bba | 4141 | kvm_x86_ops = NULL; |
56c6d28a ZX |
4142 | kvm_mmu_module_exit(); |
4143 | } | |
f8c16bba | 4144 | |
8776e519 HB |
4145 | int kvm_emulate_halt(struct kvm_vcpu *vcpu) |
4146 | { | |
4147 | ++vcpu->stat.halt_exits; | |
4148 | if (irqchip_in_kernel(vcpu->kvm)) { | |
a4535290 | 4149 | vcpu->arch.mp_state = KVM_MP_STATE_HALTED; |
8776e519 HB |
4150 | return 1; |
4151 | } else { | |
4152 | vcpu->run->exit_reason = KVM_EXIT_HLT; | |
4153 | return 0; | |
4154 | } | |
4155 | } | |
4156 | EXPORT_SYMBOL_GPL(kvm_emulate_halt); | |
4157 | ||
2f333bcb MT |
4158 | static inline gpa_t hc_gpa(struct kvm_vcpu *vcpu, unsigned long a0, |
4159 | unsigned long a1) | |
4160 | { | |
4161 | if (is_long_mode(vcpu)) | |
4162 | return a0; | |
4163 | else | |
4164 | return a0 | ((gpa_t)a1 << 32); | |
4165 | } | |
4166 | ||
55cd8e5a GN |
4167 | int kvm_hv_hypercall(struct kvm_vcpu *vcpu) |
4168 | { | |
4169 | u64 param, ingpa, outgpa, ret; | |
4170 | uint16_t code, rep_idx, rep_cnt, res = HV_STATUS_SUCCESS, rep_done = 0; | |
4171 | bool fast, longmode; | |
4172 | int cs_db, cs_l; | |
4173 | ||
4174 | /* | |
4175 | * hypercall generates UD from non zero cpl and real mode | |
4176 | * per HYPER-V spec | |
4177 | */ | |
3eeb3288 | 4178 | if (kvm_x86_ops->get_cpl(vcpu) != 0 || !is_protmode(vcpu)) { |
55cd8e5a GN |
4179 | kvm_queue_exception(vcpu, UD_VECTOR); |
4180 | return 0; | |
4181 | } | |
4182 | ||
4183 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); | |
4184 | longmode = is_long_mode(vcpu) && cs_l == 1; | |
4185 | ||
4186 | if (!longmode) { | |
ccd46936 GN |
4187 | param = ((u64)kvm_register_read(vcpu, VCPU_REGS_RDX) << 32) | |
4188 | (kvm_register_read(vcpu, VCPU_REGS_RAX) & 0xffffffff); | |
4189 | ingpa = ((u64)kvm_register_read(vcpu, VCPU_REGS_RBX) << 32) | | |
4190 | (kvm_register_read(vcpu, VCPU_REGS_RCX) & 0xffffffff); | |
4191 | outgpa = ((u64)kvm_register_read(vcpu, VCPU_REGS_RDI) << 32) | | |
4192 | (kvm_register_read(vcpu, VCPU_REGS_RSI) & 0xffffffff); | |
55cd8e5a GN |
4193 | } |
4194 | #ifdef CONFIG_X86_64 | |
4195 | else { | |
4196 | param = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
4197 | ingpa = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
4198 | outgpa = kvm_register_read(vcpu, VCPU_REGS_R8); | |
4199 | } | |
4200 | #endif | |
4201 | ||
4202 | code = param & 0xffff; | |
4203 | fast = (param >> 16) & 0x1; | |
4204 | rep_cnt = (param >> 32) & 0xfff; | |
4205 | rep_idx = (param >> 48) & 0xfff; | |
4206 | ||
4207 | trace_kvm_hv_hypercall(code, fast, rep_cnt, rep_idx, ingpa, outgpa); | |
4208 | ||
c25bc163 GN |
4209 | switch (code) { |
4210 | case HV_X64_HV_NOTIFY_LONG_SPIN_WAIT: | |
4211 | kvm_vcpu_on_spin(vcpu); | |
4212 | break; | |
4213 | default: | |
4214 | res = HV_STATUS_INVALID_HYPERCALL_CODE; | |
4215 | break; | |
4216 | } | |
55cd8e5a GN |
4217 | |
4218 | ret = res | (((u64)rep_done & 0xfff) << 32); | |
4219 | if (longmode) { | |
4220 | kvm_register_write(vcpu, VCPU_REGS_RAX, ret); | |
4221 | } else { | |
4222 | kvm_register_write(vcpu, VCPU_REGS_RDX, ret >> 32); | |
4223 | kvm_register_write(vcpu, VCPU_REGS_RAX, ret & 0xffffffff); | |
4224 | } | |
4225 | ||
4226 | return 1; | |
4227 | } | |
4228 | ||
8776e519 HB |
4229 | int kvm_emulate_hypercall(struct kvm_vcpu *vcpu) |
4230 | { | |
4231 | unsigned long nr, a0, a1, a2, a3, ret; | |
2f333bcb | 4232 | int r = 1; |
8776e519 | 4233 | |
55cd8e5a GN |
4234 | if (kvm_hv_hypercall_enabled(vcpu->kvm)) |
4235 | return kvm_hv_hypercall(vcpu); | |
4236 | ||
5fdbf976 MT |
4237 | nr = kvm_register_read(vcpu, VCPU_REGS_RAX); |
4238 | a0 = kvm_register_read(vcpu, VCPU_REGS_RBX); | |
4239 | a1 = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
4240 | a2 = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
4241 | a3 = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
8776e519 | 4242 | |
229456fc | 4243 | trace_kvm_hypercall(nr, a0, a1, a2, a3); |
2714d1d3 | 4244 | |
8776e519 HB |
4245 | if (!is_long_mode(vcpu)) { |
4246 | nr &= 0xFFFFFFFF; | |
4247 | a0 &= 0xFFFFFFFF; | |
4248 | a1 &= 0xFFFFFFFF; | |
4249 | a2 &= 0xFFFFFFFF; | |
4250 | a3 &= 0xFFFFFFFF; | |
4251 | } | |
4252 | ||
07708c4a JK |
4253 | if (kvm_x86_ops->get_cpl(vcpu) != 0) { |
4254 | ret = -KVM_EPERM; | |
4255 | goto out; | |
4256 | } | |
4257 | ||
8776e519 | 4258 | switch (nr) { |
b93463aa AK |
4259 | case KVM_HC_VAPIC_POLL_IRQ: |
4260 | ret = 0; | |
4261 | break; | |
2f333bcb MT |
4262 | case KVM_HC_MMU_OP: |
4263 | r = kvm_pv_mmu_op(vcpu, a0, hc_gpa(vcpu, a1, a2), &ret); | |
4264 | break; | |
8776e519 HB |
4265 | default: |
4266 | ret = -KVM_ENOSYS; | |
4267 | break; | |
4268 | } | |
07708c4a | 4269 | out: |
5fdbf976 | 4270 | kvm_register_write(vcpu, VCPU_REGS_RAX, ret); |
f11c3a8d | 4271 | ++vcpu->stat.hypercalls; |
2f333bcb | 4272 | return r; |
8776e519 HB |
4273 | } |
4274 | EXPORT_SYMBOL_GPL(kvm_emulate_hypercall); | |
4275 | ||
4276 | int kvm_fix_hypercall(struct kvm_vcpu *vcpu) | |
4277 | { | |
4278 | char instruction[3]; | |
5fdbf976 | 4279 | unsigned long rip = kvm_rip_read(vcpu); |
8776e519 | 4280 | |
8776e519 HB |
4281 | /* |
4282 | * Blow out the MMU to ensure that no other VCPU has an active mapping | |
4283 | * to ensure that the updated hypercall appears atomically across all | |
4284 | * VCPUs. | |
4285 | */ | |
4286 | kvm_mmu_zap_all(vcpu->kvm); | |
4287 | ||
8776e519 | 4288 | kvm_x86_ops->patch_hypercall(vcpu, instruction); |
8776e519 | 4289 | |
8fe681e9 | 4290 | return emulator_write_emulated(rip, instruction, 3, NULL, vcpu); |
8776e519 HB |
4291 | } |
4292 | ||
8776e519 HB |
4293 | void realmode_lgdt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base) |
4294 | { | |
89a27f4d | 4295 | struct desc_ptr dt = { limit, base }; |
8776e519 HB |
4296 | |
4297 | kvm_x86_ops->set_gdt(vcpu, &dt); | |
4298 | } | |
4299 | ||
4300 | void realmode_lidt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base) | |
4301 | { | |
89a27f4d | 4302 | struct desc_ptr dt = { limit, base }; |
8776e519 HB |
4303 | |
4304 | kvm_x86_ops->set_idt(vcpu, &dt); | |
4305 | } | |
4306 | ||
07716717 DK |
4307 | static int move_to_next_stateful_cpuid_entry(struct kvm_vcpu *vcpu, int i) |
4308 | { | |
ad312c7c ZX |
4309 | struct kvm_cpuid_entry2 *e = &vcpu->arch.cpuid_entries[i]; |
4310 | int j, nent = vcpu->arch.cpuid_nent; | |
07716717 DK |
4311 | |
4312 | e->flags &= ~KVM_CPUID_FLAG_STATE_READ_NEXT; | |
4313 | /* when no next entry is found, the current entry[i] is reselected */ | |
0fdf8e59 | 4314 | for (j = i + 1; ; j = (j + 1) % nent) { |
ad312c7c | 4315 | struct kvm_cpuid_entry2 *ej = &vcpu->arch.cpuid_entries[j]; |
07716717 DK |
4316 | if (ej->function == e->function) { |
4317 | ej->flags |= KVM_CPUID_FLAG_STATE_READ_NEXT; | |
4318 | return j; | |
4319 | } | |
4320 | } | |
4321 | return 0; /* silence gcc, even though control never reaches here */ | |
4322 | } | |
4323 | ||
4324 | /* find an entry with matching function, matching index (if needed), and that | |
4325 | * should be read next (if it's stateful) */ | |
4326 | static int is_matching_cpuid_entry(struct kvm_cpuid_entry2 *e, | |
4327 | u32 function, u32 index) | |
4328 | { | |
4329 | if (e->function != function) | |
4330 | return 0; | |
4331 | if ((e->flags & KVM_CPUID_FLAG_SIGNIFCANT_INDEX) && e->index != index) | |
4332 | return 0; | |
4333 | if ((e->flags & KVM_CPUID_FLAG_STATEFUL_FUNC) && | |
19355475 | 4334 | !(e->flags & KVM_CPUID_FLAG_STATE_READ_NEXT)) |
07716717 DK |
4335 | return 0; |
4336 | return 1; | |
4337 | } | |
4338 | ||
d8017474 AG |
4339 | struct kvm_cpuid_entry2 *kvm_find_cpuid_entry(struct kvm_vcpu *vcpu, |
4340 | u32 function, u32 index) | |
8776e519 HB |
4341 | { |
4342 | int i; | |
d8017474 | 4343 | struct kvm_cpuid_entry2 *best = NULL; |
8776e519 | 4344 | |
ad312c7c | 4345 | for (i = 0; i < vcpu->arch.cpuid_nent; ++i) { |
d8017474 AG |
4346 | struct kvm_cpuid_entry2 *e; |
4347 | ||
ad312c7c | 4348 | e = &vcpu->arch.cpuid_entries[i]; |
07716717 DK |
4349 | if (is_matching_cpuid_entry(e, function, index)) { |
4350 | if (e->flags & KVM_CPUID_FLAG_STATEFUL_FUNC) | |
4351 | move_to_next_stateful_cpuid_entry(vcpu, i); | |
8776e519 HB |
4352 | best = e; |
4353 | break; | |
4354 | } | |
4355 | /* | |
4356 | * Both basic or both extended? | |
4357 | */ | |
4358 | if (((e->function ^ function) & 0x80000000) == 0) | |
4359 | if (!best || e->function > best->function) | |
4360 | best = e; | |
4361 | } | |
d8017474 AG |
4362 | return best; |
4363 | } | |
0e851880 | 4364 | EXPORT_SYMBOL_GPL(kvm_find_cpuid_entry); |
d8017474 | 4365 | |
82725b20 DE |
4366 | int cpuid_maxphyaddr(struct kvm_vcpu *vcpu) |
4367 | { | |
4368 | struct kvm_cpuid_entry2 *best; | |
4369 | ||
f7a71197 AK |
4370 | best = kvm_find_cpuid_entry(vcpu, 0x80000000, 0); |
4371 | if (!best || best->eax < 0x80000008) | |
4372 | goto not_found; | |
82725b20 DE |
4373 | best = kvm_find_cpuid_entry(vcpu, 0x80000008, 0); |
4374 | if (best) | |
4375 | return best->eax & 0xff; | |
f7a71197 | 4376 | not_found: |
82725b20 DE |
4377 | return 36; |
4378 | } | |
4379 | ||
d8017474 AG |
4380 | void kvm_emulate_cpuid(struct kvm_vcpu *vcpu) |
4381 | { | |
4382 | u32 function, index; | |
4383 | struct kvm_cpuid_entry2 *best; | |
4384 | ||
4385 | function = kvm_register_read(vcpu, VCPU_REGS_RAX); | |
4386 | index = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
4387 | kvm_register_write(vcpu, VCPU_REGS_RAX, 0); | |
4388 | kvm_register_write(vcpu, VCPU_REGS_RBX, 0); | |
4389 | kvm_register_write(vcpu, VCPU_REGS_RCX, 0); | |
4390 | kvm_register_write(vcpu, VCPU_REGS_RDX, 0); | |
4391 | best = kvm_find_cpuid_entry(vcpu, function, index); | |
8776e519 | 4392 | if (best) { |
5fdbf976 MT |
4393 | kvm_register_write(vcpu, VCPU_REGS_RAX, best->eax); |
4394 | kvm_register_write(vcpu, VCPU_REGS_RBX, best->ebx); | |
4395 | kvm_register_write(vcpu, VCPU_REGS_RCX, best->ecx); | |
4396 | kvm_register_write(vcpu, VCPU_REGS_RDX, best->edx); | |
8776e519 | 4397 | } |
8776e519 | 4398 | kvm_x86_ops->skip_emulated_instruction(vcpu); |
229456fc MT |
4399 | trace_kvm_cpuid(function, |
4400 | kvm_register_read(vcpu, VCPU_REGS_RAX), | |
4401 | kvm_register_read(vcpu, VCPU_REGS_RBX), | |
4402 | kvm_register_read(vcpu, VCPU_REGS_RCX), | |
4403 | kvm_register_read(vcpu, VCPU_REGS_RDX)); | |
8776e519 HB |
4404 | } |
4405 | EXPORT_SYMBOL_GPL(kvm_emulate_cpuid); | |
d0752060 | 4406 | |
b6c7a5dc HB |
4407 | /* |
4408 | * Check if userspace requested an interrupt window, and that the | |
4409 | * interrupt window is open. | |
4410 | * | |
4411 | * No need to exit to userspace if we already have an interrupt queued. | |
4412 | */ | |
851ba692 | 4413 | static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu) |
b6c7a5dc | 4414 | { |
8061823a | 4415 | return (!irqchip_in_kernel(vcpu->kvm) && !kvm_cpu_has_interrupt(vcpu) && |
851ba692 | 4416 | vcpu->run->request_interrupt_window && |
5df56646 | 4417 | kvm_arch_interrupt_allowed(vcpu)); |
b6c7a5dc HB |
4418 | } |
4419 | ||
851ba692 | 4420 | static void post_kvm_run_save(struct kvm_vcpu *vcpu) |
b6c7a5dc | 4421 | { |
851ba692 AK |
4422 | struct kvm_run *kvm_run = vcpu->run; |
4423 | ||
91586a3b | 4424 | kvm_run->if_flag = (kvm_get_rflags(vcpu) & X86_EFLAGS_IF) != 0; |
2d3ad1f4 | 4425 | kvm_run->cr8 = kvm_get_cr8(vcpu); |
b6c7a5dc | 4426 | kvm_run->apic_base = kvm_get_apic_base(vcpu); |
4531220b | 4427 | if (irqchip_in_kernel(vcpu->kvm)) |
b6c7a5dc | 4428 | kvm_run->ready_for_interrupt_injection = 1; |
4531220b | 4429 | else |
b6c7a5dc | 4430 | kvm_run->ready_for_interrupt_injection = |
fa9726b0 GN |
4431 | kvm_arch_interrupt_allowed(vcpu) && |
4432 | !kvm_cpu_has_interrupt(vcpu) && | |
4433 | !kvm_event_needs_reinjection(vcpu); | |
b6c7a5dc HB |
4434 | } |
4435 | ||
b93463aa AK |
4436 | static void vapic_enter(struct kvm_vcpu *vcpu) |
4437 | { | |
4438 | struct kvm_lapic *apic = vcpu->arch.apic; | |
4439 | struct page *page; | |
4440 | ||
4441 | if (!apic || !apic->vapic_addr) | |
4442 | return; | |
4443 | ||
4444 | page = gfn_to_page(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT); | |
72dc67a6 IE |
4445 | |
4446 | vcpu->arch.apic->vapic_page = page; | |
b93463aa AK |
4447 | } |
4448 | ||
4449 | static void vapic_exit(struct kvm_vcpu *vcpu) | |
4450 | { | |
4451 | struct kvm_lapic *apic = vcpu->arch.apic; | |
f656ce01 | 4452 | int idx; |
b93463aa AK |
4453 | |
4454 | if (!apic || !apic->vapic_addr) | |
4455 | return; | |
4456 | ||
f656ce01 | 4457 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
b93463aa AK |
4458 | kvm_release_page_dirty(apic->vapic_page); |
4459 | mark_page_dirty(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT); | |
f656ce01 | 4460 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
b93463aa AK |
4461 | } |
4462 | ||
95ba8273 GN |
4463 | static void update_cr8_intercept(struct kvm_vcpu *vcpu) |
4464 | { | |
4465 | int max_irr, tpr; | |
4466 | ||
4467 | if (!kvm_x86_ops->update_cr8_intercept) | |
4468 | return; | |
4469 | ||
88c808fd AK |
4470 | if (!vcpu->arch.apic) |
4471 | return; | |
4472 | ||
8db3baa2 GN |
4473 | if (!vcpu->arch.apic->vapic_addr) |
4474 | max_irr = kvm_lapic_find_highest_irr(vcpu); | |
4475 | else | |
4476 | max_irr = -1; | |
95ba8273 GN |
4477 | |
4478 | if (max_irr != -1) | |
4479 | max_irr >>= 4; | |
4480 | ||
4481 | tpr = kvm_lapic_get_cr8(vcpu); | |
4482 | ||
4483 | kvm_x86_ops->update_cr8_intercept(vcpu, tpr, max_irr); | |
4484 | } | |
4485 | ||
851ba692 | 4486 | static void inject_pending_event(struct kvm_vcpu *vcpu) |
95ba8273 GN |
4487 | { |
4488 | /* try to reinject previous events if any */ | |
b59bb7bd | 4489 | if (vcpu->arch.exception.pending) { |
5c1c85d0 AK |
4490 | trace_kvm_inj_exception(vcpu->arch.exception.nr, |
4491 | vcpu->arch.exception.has_error_code, | |
4492 | vcpu->arch.exception.error_code); | |
b59bb7bd GN |
4493 | kvm_x86_ops->queue_exception(vcpu, vcpu->arch.exception.nr, |
4494 | vcpu->arch.exception.has_error_code, | |
ce7ddec4 JR |
4495 | vcpu->arch.exception.error_code, |
4496 | vcpu->arch.exception.reinject); | |
b59bb7bd GN |
4497 | return; |
4498 | } | |
4499 | ||
95ba8273 GN |
4500 | if (vcpu->arch.nmi_injected) { |
4501 | kvm_x86_ops->set_nmi(vcpu); | |
4502 | return; | |
4503 | } | |
4504 | ||
4505 | if (vcpu->arch.interrupt.pending) { | |
66fd3f7f | 4506 | kvm_x86_ops->set_irq(vcpu); |
95ba8273 GN |
4507 | return; |
4508 | } | |
4509 | ||
4510 | /* try to inject new event if pending */ | |
4511 | if (vcpu->arch.nmi_pending) { | |
4512 | if (kvm_x86_ops->nmi_allowed(vcpu)) { | |
4513 | vcpu->arch.nmi_pending = false; | |
4514 | vcpu->arch.nmi_injected = true; | |
4515 | kvm_x86_ops->set_nmi(vcpu); | |
4516 | } | |
4517 | } else if (kvm_cpu_has_interrupt(vcpu)) { | |
4518 | if (kvm_x86_ops->interrupt_allowed(vcpu)) { | |
66fd3f7f GN |
4519 | kvm_queue_interrupt(vcpu, kvm_cpu_get_interrupt(vcpu), |
4520 | false); | |
4521 | kvm_x86_ops->set_irq(vcpu); | |
95ba8273 GN |
4522 | } |
4523 | } | |
4524 | } | |
4525 | ||
851ba692 | 4526 | static int vcpu_enter_guest(struct kvm_vcpu *vcpu) |
b6c7a5dc HB |
4527 | { |
4528 | int r; | |
6a8b1d13 | 4529 | bool req_int_win = !irqchip_in_kernel(vcpu->kvm) && |
851ba692 | 4530 | vcpu->run->request_interrupt_window; |
b6c7a5dc | 4531 | |
2e53d63a MT |
4532 | if (vcpu->requests) |
4533 | if (test_and_clear_bit(KVM_REQ_MMU_RELOAD, &vcpu->requests)) | |
4534 | kvm_mmu_unload(vcpu); | |
4535 | ||
b6c7a5dc HB |
4536 | r = kvm_mmu_reload(vcpu); |
4537 | if (unlikely(r)) | |
4538 | goto out; | |
4539 | ||
2f52d58c AK |
4540 | if (vcpu->requests) { |
4541 | if (test_and_clear_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests)) | |
2f599714 | 4542 | __kvm_migrate_timers(vcpu); |
c8076604 GH |
4543 | if (test_and_clear_bit(KVM_REQ_KVMCLOCK_UPDATE, &vcpu->requests)) |
4544 | kvm_write_guest_time(vcpu); | |
4731d4c7 MT |
4545 | if (test_and_clear_bit(KVM_REQ_MMU_SYNC, &vcpu->requests)) |
4546 | kvm_mmu_sync_roots(vcpu); | |
d4acf7e7 MT |
4547 | if (test_and_clear_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests)) |
4548 | kvm_x86_ops->tlb_flush(vcpu); | |
b93463aa AK |
4549 | if (test_and_clear_bit(KVM_REQ_REPORT_TPR_ACCESS, |
4550 | &vcpu->requests)) { | |
851ba692 | 4551 | vcpu->run->exit_reason = KVM_EXIT_TPR_ACCESS; |
b93463aa AK |
4552 | r = 0; |
4553 | goto out; | |
4554 | } | |
71c4dfaf | 4555 | if (test_and_clear_bit(KVM_REQ_TRIPLE_FAULT, &vcpu->requests)) { |
851ba692 | 4556 | vcpu->run->exit_reason = KVM_EXIT_SHUTDOWN; |
71c4dfaf JR |
4557 | r = 0; |
4558 | goto out; | |
4559 | } | |
02daab21 AK |
4560 | if (test_and_clear_bit(KVM_REQ_DEACTIVATE_FPU, &vcpu->requests)) { |
4561 | vcpu->fpu_active = 0; | |
4562 | kvm_x86_ops->fpu_deactivate(vcpu); | |
4563 | } | |
2f52d58c | 4564 | } |
b93463aa | 4565 | |
b6c7a5dc HB |
4566 | preempt_disable(); |
4567 | ||
4568 | kvm_x86_ops->prepare_guest_switch(vcpu); | |
2608d7a1 AK |
4569 | if (vcpu->fpu_active) |
4570 | kvm_load_guest_fpu(vcpu); | |
b6c7a5dc | 4571 | |
d94e1dc9 AK |
4572 | atomic_set(&vcpu->guest_mode, 1); |
4573 | smp_wmb(); | |
b6c7a5dc | 4574 | |
d94e1dc9 | 4575 | local_irq_disable(); |
32f88400 | 4576 | |
d94e1dc9 AK |
4577 | if (!atomic_read(&vcpu->guest_mode) || vcpu->requests |
4578 | || need_resched() || signal_pending(current)) { | |
4579 | atomic_set(&vcpu->guest_mode, 0); | |
4580 | smp_wmb(); | |
6c142801 AK |
4581 | local_irq_enable(); |
4582 | preempt_enable(); | |
4583 | r = 1; | |
4584 | goto out; | |
4585 | } | |
4586 | ||
851ba692 | 4587 | inject_pending_event(vcpu); |
b6c7a5dc | 4588 | |
6a8b1d13 GN |
4589 | /* enable NMI/IRQ window open exits if needed */ |
4590 | if (vcpu->arch.nmi_pending) | |
4591 | kvm_x86_ops->enable_nmi_window(vcpu); | |
4592 | else if (kvm_cpu_has_interrupt(vcpu) || req_int_win) | |
4593 | kvm_x86_ops->enable_irq_window(vcpu); | |
4594 | ||
95ba8273 | 4595 | if (kvm_lapic_enabled(vcpu)) { |
8db3baa2 GN |
4596 | update_cr8_intercept(vcpu); |
4597 | kvm_lapic_sync_to_vapic(vcpu); | |
95ba8273 | 4598 | } |
b93463aa | 4599 | |
f656ce01 | 4600 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
3200f405 | 4601 | |
b6c7a5dc HB |
4602 | kvm_guest_enter(); |
4603 | ||
42dbaa5a | 4604 | if (unlikely(vcpu->arch.switch_db_regs)) { |
42dbaa5a JK |
4605 | set_debugreg(0, 7); |
4606 | set_debugreg(vcpu->arch.eff_db[0], 0); | |
4607 | set_debugreg(vcpu->arch.eff_db[1], 1); | |
4608 | set_debugreg(vcpu->arch.eff_db[2], 2); | |
4609 | set_debugreg(vcpu->arch.eff_db[3], 3); | |
4610 | } | |
b6c7a5dc | 4611 | |
229456fc | 4612 | trace_kvm_entry(vcpu->vcpu_id); |
851ba692 | 4613 | kvm_x86_ops->run(vcpu); |
b6c7a5dc | 4614 | |
24f1e32c FW |
4615 | /* |
4616 | * If the guest has used debug registers, at least dr7 | |
4617 | * will be disabled while returning to the host. | |
4618 | * If we don't have active breakpoints in the host, we don't | |
4619 | * care about the messed up debug address registers. But if | |
4620 | * we have some of them active, restore the old state. | |
4621 | */ | |
59d8eb53 | 4622 | if (hw_breakpoint_active()) |
24f1e32c | 4623 | hw_breakpoint_restore(); |
42dbaa5a | 4624 | |
d94e1dc9 AK |
4625 | atomic_set(&vcpu->guest_mode, 0); |
4626 | smp_wmb(); | |
b6c7a5dc HB |
4627 | local_irq_enable(); |
4628 | ||
4629 | ++vcpu->stat.exits; | |
4630 | ||
4631 | /* | |
4632 | * We must have an instruction between local_irq_enable() and | |
4633 | * kvm_guest_exit(), so the timer interrupt isn't delayed by | |
4634 | * the interrupt shadow. The stat.exits increment will do nicely. | |
4635 | * But we need to prevent reordering, hence this barrier(): | |
4636 | */ | |
4637 | barrier(); | |
4638 | ||
4639 | kvm_guest_exit(); | |
4640 | ||
4641 | preempt_enable(); | |
4642 | ||
f656ce01 | 4643 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
3200f405 | 4644 | |
b6c7a5dc HB |
4645 | /* |
4646 | * Profile KVM exit RIPs: | |
4647 | */ | |
4648 | if (unlikely(prof_on == KVM_PROFILING)) { | |
5fdbf976 MT |
4649 | unsigned long rip = kvm_rip_read(vcpu); |
4650 | profile_hit(KVM_PROFILING, (void *)rip); | |
b6c7a5dc HB |
4651 | } |
4652 | ||
298101da | 4653 | |
b93463aa AK |
4654 | kvm_lapic_sync_from_vapic(vcpu); |
4655 | ||
851ba692 | 4656 | r = kvm_x86_ops->handle_exit(vcpu); |
d7690175 MT |
4657 | out: |
4658 | return r; | |
4659 | } | |
b6c7a5dc | 4660 | |
09cec754 | 4661 | |
851ba692 | 4662 | static int __vcpu_run(struct kvm_vcpu *vcpu) |
d7690175 MT |
4663 | { |
4664 | int r; | |
f656ce01 | 4665 | struct kvm *kvm = vcpu->kvm; |
d7690175 MT |
4666 | |
4667 | if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_SIPI_RECEIVED)) { | |
1b10bf31 JK |
4668 | pr_debug("vcpu %d received sipi with vector # %x\n", |
4669 | vcpu->vcpu_id, vcpu->arch.sipi_vector); | |
d7690175 | 4670 | kvm_lapic_reset(vcpu); |
5f179287 | 4671 | r = kvm_arch_vcpu_reset(vcpu); |
d7690175 MT |
4672 | if (r) |
4673 | return r; | |
4674 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; | |
b6c7a5dc HB |
4675 | } |
4676 | ||
f656ce01 | 4677 | vcpu->srcu_idx = srcu_read_lock(&kvm->srcu); |
d7690175 MT |
4678 | vapic_enter(vcpu); |
4679 | ||
4680 | r = 1; | |
4681 | while (r > 0) { | |
af2152f5 | 4682 | if (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE) |
851ba692 | 4683 | r = vcpu_enter_guest(vcpu); |
d7690175 | 4684 | else { |
f656ce01 | 4685 | srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx); |
d7690175 | 4686 | kvm_vcpu_block(vcpu); |
f656ce01 | 4687 | vcpu->srcu_idx = srcu_read_lock(&kvm->srcu); |
d7690175 | 4688 | if (test_and_clear_bit(KVM_REQ_UNHALT, &vcpu->requests)) |
09cec754 GN |
4689 | { |
4690 | switch(vcpu->arch.mp_state) { | |
4691 | case KVM_MP_STATE_HALTED: | |
d7690175 | 4692 | vcpu->arch.mp_state = |
09cec754 GN |
4693 | KVM_MP_STATE_RUNNABLE; |
4694 | case KVM_MP_STATE_RUNNABLE: | |
4695 | break; | |
4696 | case KVM_MP_STATE_SIPI_RECEIVED: | |
4697 | default: | |
4698 | r = -EINTR; | |
4699 | break; | |
4700 | } | |
4701 | } | |
d7690175 MT |
4702 | } |
4703 | ||
09cec754 GN |
4704 | if (r <= 0) |
4705 | break; | |
4706 | ||
4707 | clear_bit(KVM_REQ_PENDING_TIMER, &vcpu->requests); | |
4708 | if (kvm_cpu_has_pending_timer(vcpu)) | |
4709 | kvm_inject_pending_timer_irqs(vcpu); | |
4710 | ||
851ba692 | 4711 | if (dm_request_for_irq_injection(vcpu)) { |
09cec754 | 4712 | r = -EINTR; |
851ba692 | 4713 | vcpu->run->exit_reason = KVM_EXIT_INTR; |
09cec754 GN |
4714 | ++vcpu->stat.request_irq_exits; |
4715 | } | |
4716 | if (signal_pending(current)) { | |
4717 | r = -EINTR; | |
851ba692 | 4718 | vcpu->run->exit_reason = KVM_EXIT_INTR; |
09cec754 GN |
4719 | ++vcpu->stat.signal_exits; |
4720 | } | |
4721 | if (need_resched()) { | |
f656ce01 | 4722 | srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx); |
09cec754 | 4723 | kvm_resched(vcpu); |
f656ce01 | 4724 | vcpu->srcu_idx = srcu_read_lock(&kvm->srcu); |
d7690175 | 4725 | } |
b6c7a5dc HB |
4726 | } |
4727 | ||
f656ce01 | 4728 | srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx); |
b6c7a5dc | 4729 | |
b93463aa AK |
4730 | vapic_exit(vcpu); |
4731 | ||
b6c7a5dc HB |
4732 | return r; |
4733 | } | |
4734 | ||
4735 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
4736 | { | |
4737 | int r; | |
4738 | sigset_t sigsaved; | |
4739 | ||
ac9f6dc0 AK |
4740 | if (vcpu->sigset_active) |
4741 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
4742 | ||
a4535290 | 4743 | if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)) { |
b6c7a5dc | 4744 | kvm_vcpu_block(vcpu); |
d7690175 | 4745 | clear_bit(KVM_REQ_UNHALT, &vcpu->requests); |
ac9f6dc0 AK |
4746 | r = -EAGAIN; |
4747 | goto out; | |
b6c7a5dc HB |
4748 | } |
4749 | ||
b6c7a5dc HB |
4750 | /* re-sync apic's tpr */ |
4751 | if (!irqchip_in_kernel(vcpu->kvm)) | |
2d3ad1f4 | 4752 | kvm_set_cr8(vcpu, kvm_run->cr8); |
b6c7a5dc | 4753 | |
92bf9748 GN |
4754 | if (vcpu->arch.pio.count || vcpu->mmio_needed || |
4755 | vcpu->arch.emulate_ctxt.restart) { | |
4756 | if (vcpu->mmio_needed) { | |
4757 | memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8); | |
4758 | vcpu->mmio_read_completed = 1; | |
4759 | vcpu->mmio_needed = 0; | |
b6c7a5dc | 4760 | } |
f656ce01 | 4761 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
5cd21917 | 4762 | r = emulate_instruction(vcpu, 0, 0, EMULTYPE_NO_DECODE); |
f656ce01 | 4763 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
6d77dbfc | 4764 | if (r != EMULATE_DONE) { |
b6c7a5dc HB |
4765 | r = 0; |
4766 | goto out; | |
4767 | } | |
4768 | } | |
5fdbf976 MT |
4769 | if (kvm_run->exit_reason == KVM_EXIT_HYPERCALL) |
4770 | kvm_register_write(vcpu, VCPU_REGS_RAX, | |
4771 | kvm_run->hypercall.ret); | |
b6c7a5dc | 4772 | |
851ba692 | 4773 | r = __vcpu_run(vcpu); |
b6c7a5dc HB |
4774 | |
4775 | out: | |
f1d86e46 | 4776 | post_kvm_run_save(vcpu); |
b6c7a5dc HB |
4777 | if (vcpu->sigset_active) |
4778 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
4779 | ||
b6c7a5dc HB |
4780 | return r; |
4781 | } | |
4782 | ||
4783 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
4784 | { | |
5fdbf976 MT |
4785 | regs->rax = kvm_register_read(vcpu, VCPU_REGS_RAX); |
4786 | regs->rbx = kvm_register_read(vcpu, VCPU_REGS_RBX); | |
4787 | regs->rcx = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
4788 | regs->rdx = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
4789 | regs->rsi = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
4790 | regs->rdi = kvm_register_read(vcpu, VCPU_REGS_RDI); | |
4791 | regs->rsp = kvm_register_read(vcpu, VCPU_REGS_RSP); | |
4792 | regs->rbp = kvm_register_read(vcpu, VCPU_REGS_RBP); | |
b6c7a5dc | 4793 | #ifdef CONFIG_X86_64 |
5fdbf976 MT |
4794 | regs->r8 = kvm_register_read(vcpu, VCPU_REGS_R8); |
4795 | regs->r9 = kvm_register_read(vcpu, VCPU_REGS_R9); | |
4796 | regs->r10 = kvm_register_read(vcpu, VCPU_REGS_R10); | |
4797 | regs->r11 = kvm_register_read(vcpu, VCPU_REGS_R11); | |
4798 | regs->r12 = kvm_register_read(vcpu, VCPU_REGS_R12); | |
4799 | regs->r13 = kvm_register_read(vcpu, VCPU_REGS_R13); | |
4800 | regs->r14 = kvm_register_read(vcpu, VCPU_REGS_R14); | |
4801 | regs->r15 = kvm_register_read(vcpu, VCPU_REGS_R15); | |
b6c7a5dc HB |
4802 | #endif |
4803 | ||
5fdbf976 | 4804 | regs->rip = kvm_rip_read(vcpu); |
91586a3b | 4805 | regs->rflags = kvm_get_rflags(vcpu); |
b6c7a5dc | 4806 | |
b6c7a5dc HB |
4807 | return 0; |
4808 | } | |
4809 | ||
4810 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
4811 | { | |
5fdbf976 MT |
4812 | kvm_register_write(vcpu, VCPU_REGS_RAX, regs->rax); |
4813 | kvm_register_write(vcpu, VCPU_REGS_RBX, regs->rbx); | |
4814 | kvm_register_write(vcpu, VCPU_REGS_RCX, regs->rcx); | |
4815 | kvm_register_write(vcpu, VCPU_REGS_RDX, regs->rdx); | |
4816 | kvm_register_write(vcpu, VCPU_REGS_RSI, regs->rsi); | |
4817 | kvm_register_write(vcpu, VCPU_REGS_RDI, regs->rdi); | |
4818 | kvm_register_write(vcpu, VCPU_REGS_RSP, regs->rsp); | |
4819 | kvm_register_write(vcpu, VCPU_REGS_RBP, regs->rbp); | |
b6c7a5dc | 4820 | #ifdef CONFIG_X86_64 |
5fdbf976 MT |
4821 | kvm_register_write(vcpu, VCPU_REGS_R8, regs->r8); |
4822 | kvm_register_write(vcpu, VCPU_REGS_R9, regs->r9); | |
4823 | kvm_register_write(vcpu, VCPU_REGS_R10, regs->r10); | |
4824 | kvm_register_write(vcpu, VCPU_REGS_R11, regs->r11); | |
4825 | kvm_register_write(vcpu, VCPU_REGS_R12, regs->r12); | |
4826 | kvm_register_write(vcpu, VCPU_REGS_R13, regs->r13); | |
4827 | kvm_register_write(vcpu, VCPU_REGS_R14, regs->r14); | |
4828 | kvm_register_write(vcpu, VCPU_REGS_R15, regs->r15); | |
b6c7a5dc HB |
4829 | #endif |
4830 | ||
5fdbf976 | 4831 | kvm_rip_write(vcpu, regs->rip); |
91586a3b | 4832 | kvm_set_rflags(vcpu, regs->rflags); |
b6c7a5dc | 4833 | |
b4f14abd JK |
4834 | vcpu->arch.exception.pending = false; |
4835 | ||
b6c7a5dc HB |
4836 | return 0; |
4837 | } | |
4838 | ||
b6c7a5dc HB |
4839 | void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l) |
4840 | { | |
4841 | struct kvm_segment cs; | |
4842 | ||
3e6e0aab | 4843 | kvm_get_segment(vcpu, &cs, VCPU_SREG_CS); |
b6c7a5dc HB |
4844 | *db = cs.db; |
4845 | *l = cs.l; | |
4846 | } | |
4847 | EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits); | |
4848 | ||
4849 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, | |
4850 | struct kvm_sregs *sregs) | |
4851 | { | |
89a27f4d | 4852 | struct desc_ptr dt; |
b6c7a5dc | 4853 | |
3e6e0aab GT |
4854 | kvm_get_segment(vcpu, &sregs->cs, VCPU_SREG_CS); |
4855 | kvm_get_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
4856 | kvm_get_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
4857 | kvm_get_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
4858 | kvm_get_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
4859 | kvm_get_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
b6c7a5dc | 4860 | |
3e6e0aab GT |
4861 | kvm_get_segment(vcpu, &sregs->tr, VCPU_SREG_TR); |
4862 | kvm_get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
b6c7a5dc HB |
4863 | |
4864 | kvm_x86_ops->get_idt(vcpu, &dt); | |
89a27f4d GN |
4865 | sregs->idt.limit = dt.size; |
4866 | sregs->idt.base = dt.address; | |
b6c7a5dc | 4867 | kvm_x86_ops->get_gdt(vcpu, &dt); |
89a27f4d GN |
4868 | sregs->gdt.limit = dt.size; |
4869 | sregs->gdt.base = dt.address; | |
b6c7a5dc | 4870 | |
4d4ec087 | 4871 | sregs->cr0 = kvm_read_cr0(vcpu); |
ad312c7c ZX |
4872 | sregs->cr2 = vcpu->arch.cr2; |
4873 | sregs->cr3 = vcpu->arch.cr3; | |
fc78f519 | 4874 | sregs->cr4 = kvm_read_cr4(vcpu); |
2d3ad1f4 | 4875 | sregs->cr8 = kvm_get_cr8(vcpu); |
f6801dff | 4876 | sregs->efer = vcpu->arch.efer; |
b6c7a5dc HB |
4877 | sregs->apic_base = kvm_get_apic_base(vcpu); |
4878 | ||
923c61bb | 4879 | memset(sregs->interrupt_bitmap, 0, sizeof sregs->interrupt_bitmap); |
b6c7a5dc | 4880 | |
36752c9b | 4881 | if (vcpu->arch.interrupt.pending && !vcpu->arch.interrupt.soft) |
14d0bc1f GN |
4882 | set_bit(vcpu->arch.interrupt.nr, |
4883 | (unsigned long *)sregs->interrupt_bitmap); | |
16d7a191 | 4884 | |
b6c7a5dc HB |
4885 | return 0; |
4886 | } | |
4887 | ||
62d9f0db MT |
4888 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
4889 | struct kvm_mp_state *mp_state) | |
4890 | { | |
62d9f0db | 4891 | mp_state->mp_state = vcpu->arch.mp_state; |
62d9f0db MT |
4892 | return 0; |
4893 | } | |
4894 | ||
4895 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
4896 | struct kvm_mp_state *mp_state) | |
4897 | { | |
62d9f0db | 4898 | vcpu->arch.mp_state = mp_state->mp_state; |
62d9f0db MT |
4899 | return 0; |
4900 | } | |
4901 | ||
e269fb21 JK |
4902 | int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int reason, |
4903 | bool has_error_code, u32 error_code) | |
b6c7a5dc | 4904 | { |
4d2179e1 | 4905 | struct decode_cache *c = &vcpu->arch.emulate_ctxt.decode; |
ceffb459 GN |
4906 | int cs_db, cs_l, ret; |
4907 | cache_all_regs(vcpu); | |
37817f29 | 4908 | |
ceffb459 | 4909 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); |
e01c2426 | 4910 | |
ceffb459 GN |
4911 | vcpu->arch.emulate_ctxt.vcpu = vcpu; |
4912 | vcpu->arch.emulate_ctxt.eflags = kvm_x86_ops->get_rflags(vcpu); | |
4913 | vcpu->arch.emulate_ctxt.eip = kvm_rip_read(vcpu); | |
4914 | vcpu->arch.emulate_ctxt.mode = | |
4915 | (!is_protmode(vcpu)) ? X86EMUL_MODE_REAL : | |
4916 | (vcpu->arch.emulate_ctxt.eflags & X86_EFLAGS_VM) | |
4917 | ? X86EMUL_MODE_VM86 : cs_l | |
4918 | ? X86EMUL_MODE_PROT64 : cs_db | |
4919 | ? X86EMUL_MODE_PROT32 : X86EMUL_MODE_PROT16; | |
4d2179e1 GN |
4920 | memset(c, 0, sizeof(struct decode_cache)); |
4921 | memcpy(c->regs, vcpu->arch.regs, sizeof c->regs); | |
c697518a | 4922 | |
ceffb459 | 4923 | ret = emulator_task_switch(&vcpu->arch.emulate_ctxt, &emulate_ops, |
e269fb21 JK |
4924 | tss_selector, reason, has_error_code, |
4925 | error_code); | |
c697518a | 4926 | |
c697518a | 4927 | if (ret) |
19d04437 | 4928 | return EMULATE_FAIL; |
37817f29 | 4929 | |
4d2179e1 | 4930 | memcpy(vcpu->arch.regs, c->regs, sizeof c->regs); |
95c55886 | 4931 | kvm_rip_write(vcpu, vcpu->arch.emulate_ctxt.eip); |
19d04437 GN |
4932 | kvm_x86_ops->set_rflags(vcpu, vcpu->arch.emulate_ctxt.eflags); |
4933 | return EMULATE_DONE; | |
37817f29 IE |
4934 | } |
4935 | EXPORT_SYMBOL_GPL(kvm_task_switch); | |
4936 | ||
b6c7a5dc HB |
4937 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, |
4938 | struct kvm_sregs *sregs) | |
4939 | { | |
4940 | int mmu_reset_needed = 0; | |
923c61bb | 4941 | int pending_vec, max_bits; |
89a27f4d | 4942 | struct desc_ptr dt; |
b6c7a5dc | 4943 | |
89a27f4d GN |
4944 | dt.size = sregs->idt.limit; |
4945 | dt.address = sregs->idt.base; | |
b6c7a5dc | 4946 | kvm_x86_ops->set_idt(vcpu, &dt); |
89a27f4d GN |
4947 | dt.size = sregs->gdt.limit; |
4948 | dt.address = sregs->gdt.base; | |
b6c7a5dc HB |
4949 | kvm_x86_ops->set_gdt(vcpu, &dt); |
4950 | ||
ad312c7c ZX |
4951 | vcpu->arch.cr2 = sregs->cr2; |
4952 | mmu_reset_needed |= vcpu->arch.cr3 != sregs->cr3; | |
dc7e795e | 4953 | vcpu->arch.cr3 = sregs->cr3; |
b6c7a5dc | 4954 | |
2d3ad1f4 | 4955 | kvm_set_cr8(vcpu, sregs->cr8); |
b6c7a5dc | 4956 | |
f6801dff | 4957 | mmu_reset_needed |= vcpu->arch.efer != sregs->efer; |
b6c7a5dc | 4958 | kvm_x86_ops->set_efer(vcpu, sregs->efer); |
b6c7a5dc HB |
4959 | kvm_set_apic_base(vcpu, sregs->apic_base); |
4960 | ||
4d4ec087 | 4961 | mmu_reset_needed |= kvm_read_cr0(vcpu) != sregs->cr0; |
b6c7a5dc | 4962 | kvm_x86_ops->set_cr0(vcpu, sregs->cr0); |
d7306163 | 4963 | vcpu->arch.cr0 = sregs->cr0; |
b6c7a5dc | 4964 | |
fc78f519 | 4965 | mmu_reset_needed |= kvm_read_cr4(vcpu) != sregs->cr4; |
b6c7a5dc | 4966 | kvm_x86_ops->set_cr4(vcpu, sregs->cr4); |
7c93be44 | 4967 | if (!is_long_mode(vcpu) && is_pae(vcpu)) { |
ad312c7c | 4968 | load_pdptrs(vcpu, vcpu->arch.cr3); |
7c93be44 MT |
4969 | mmu_reset_needed = 1; |
4970 | } | |
b6c7a5dc HB |
4971 | |
4972 | if (mmu_reset_needed) | |
4973 | kvm_mmu_reset_context(vcpu); | |
4974 | ||
923c61bb GN |
4975 | max_bits = (sizeof sregs->interrupt_bitmap) << 3; |
4976 | pending_vec = find_first_bit( | |
4977 | (const unsigned long *)sregs->interrupt_bitmap, max_bits); | |
4978 | if (pending_vec < max_bits) { | |
66fd3f7f | 4979 | kvm_queue_interrupt(vcpu, pending_vec, false); |
923c61bb GN |
4980 | pr_debug("Set back pending irq %d\n", pending_vec); |
4981 | if (irqchip_in_kernel(vcpu->kvm)) | |
4982 | kvm_pic_clear_isr_ack(vcpu->kvm); | |
b6c7a5dc HB |
4983 | } |
4984 | ||
3e6e0aab GT |
4985 | kvm_set_segment(vcpu, &sregs->cs, VCPU_SREG_CS); |
4986 | kvm_set_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
4987 | kvm_set_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
4988 | kvm_set_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
4989 | kvm_set_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
4990 | kvm_set_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
b6c7a5dc | 4991 | |
3e6e0aab GT |
4992 | kvm_set_segment(vcpu, &sregs->tr, VCPU_SREG_TR); |
4993 | kvm_set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
b6c7a5dc | 4994 | |
5f0269f5 ME |
4995 | update_cr8_intercept(vcpu); |
4996 | ||
9c3e4aab | 4997 | /* Older userspace won't unhalt the vcpu on reset. */ |
c5af89b6 | 4998 | if (kvm_vcpu_is_bsp(vcpu) && kvm_rip_read(vcpu) == 0xfff0 && |
9c3e4aab | 4999 | sregs->cs.selector == 0xf000 && sregs->cs.base == 0xffff0000 && |
3eeb3288 | 5000 | !is_protmode(vcpu)) |
9c3e4aab MT |
5001 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
5002 | ||
b6c7a5dc HB |
5003 | return 0; |
5004 | } | |
5005 | ||
d0bfb940 JK |
5006 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
5007 | struct kvm_guest_debug *dbg) | |
b6c7a5dc | 5008 | { |
355be0b9 | 5009 | unsigned long rflags; |
ae675ef0 | 5010 | int i, r; |
b6c7a5dc | 5011 | |
4f926bf2 JK |
5012 | if (dbg->control & (KVM_GUESTDBG_INJECT_DB | KVM_GUESTDBG_INJECT_BP)) { |
5013 | r = -EBUSY; | |
5014 | if (vcpu->arch.exception.pending) | |
2122ff5e | 5015 | goto out; |
4f926bf2 JK |
5016 | if (dbg->control & KVM_GUESTDBG_INJECT_DB) |
5017 | kvm_queue_exception(vcpu, DB_VECTOR); | |
5018 | else | |
5019 | kvm_queue_exception(vcpu, BP_VECTOR); | |
5020 | } | |
5021 | ||
91586a3b JK |
5022 | /* |
5023 | * Read rflags as long as potentially injected trace flags are still | |
5024 | * filtered out. | |
5025 | */ | |
5026 | rflags = kvm_get_rflags(vcpu); | |
355be0b9 JK |
5027 | |
5028 | vcpu->guest_debug = dbg->control; | |
5029 | if (!(vcpu->guest_debug & KVM_GUESTDBG_ENABLE)) | |
5030 | vcpu->guest_debug = 0; | |
5031 | ||
5032 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) { | |
ae675ef0 JK |
5033 | for (i = 0; i < KVM_NR_DB_REGS; ++i) |
5034 | vcpu->arch.eff_db[i] = dbg->arch.debugreg[i]; | |
5035 | vcpu->arch.switch_db_regs = | |
5036 | (dbg->arch.debugreg[7] & DR7_BP_EN_MASK); | |
5037 | } else { | |
5038 | for (i = 0; i < KVM_NR_DB_REGS; i++) | |
5039 | vcpu->arch.eff_db[i] = vcpu->arch.db[i]; | |
5040 | vcpu->arch.switch_db_regs = (vcpu->arch.dr7 & DR7_BP_EN_MASK); | |
5041 | } | |
5042 | ||
f92653ee JK |
5043 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) |
5044 | vcpu->arch.singlestep_rip = kvm_rip_read(vcpu) + | |
5045 | get_segment_base(vcpu, VCPU_SREG_CS); | |
94fe45da | 5046 | |
91586a3b JK |
5047 | /* |
5048 | * Trigger an rflags update that will inject or remove the trace | |
5049 | * flags. | |
5050 | */ | |
5051 | kvm_set_rflags(vcpu, rflags); | |
b6c7a5dc | 5052 | |
355be0b9 | 5053 | kvm_x86_ops->set_guest_debug(vcpu, dbg); |
b6c7a5dc | 5054 | |
4f926bf2 | 5055 | r = 0; |
d0bfb940 | 5056 | |
2122ff5e | 5057 | out: |
b6c7a5dc HB |
5058 | |
5059 | return r; | |
5060 | } | |
5061 | ||
8b006791 ZX |
5062 | /* |
5063 | * Translate a guest virtual address to a guest physical address. | |
5064 | */ | |
5065 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, | |
5066 | struct kvm_translation *tr) | |
5067 | { | |
5068 | unsigned long vaddr = tr->linear_address; | |
5069 | gpa_t gpa; | |
f656ce01 | 5070 | int idx; |
8b006791 | 5071 | |
f656ce01 | 5072 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
1871c602 | 5073 | gpa = kvm_mmu_gva_to_gpa_system(vcpu, vaddr, NULL); |
f656ce01 | 5074 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
8b006791 ZX |
5075 | tr->physical_address = gpa; |
5076 | tr->valid = gpa != UNMAPPED_GVA; | |
5077 | tr->writeable = 1; | |
5078 | tr->usermode = 0; | |
8b006791 ZX |
5079 | |
5080 | return 0; | |
5081 | } | |
5082 | ||
d0752060 HB |
5083 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) |
5084 | { | |
98918833 SY |
5085 | struct i387_fxsave_struct *fxsave = |
5086 | &vcpu->arch.guest_fpu.state->fxsave; | |
d0752060 | 5087 | |
d0752060 HB |
5088 | memcpy(fpu->fpr, fxsave->st_space, 128); |
5089 | fpu->fcw = fxsave->cwd; | |
5090 | fpu->fsw = fxsave->swd; | |
5091 | fpu->ftwx = fxsave->twd; | |
5092 | fpu->last_opcode = fxsave->fop; | |
5093 | fpu->last_ip = fxsave->rip; | |
5094 | fpu->last_dp = fxsave->rdp; | |
5095 | memcpy(fpu->xmm, fxsave->xmm_space, sizeof fxsave->xmm_space); | |
5096 | ||
d0752060 HB |
5097 | return 0; |
5098 | } | |
5099 | ||
5100 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
5101 | { | |
98918833 SY |
5102 | struct i387_fxsave_struct *fxsave = |
5103 | &vcpu->arch.guest_fpu.state->fxsave; | |
d0752060 | 5104 | |
d0752060 HB |
5105 | memcpy(fxsave->st_space, fpu->fpr, 128); |
5106 | fxsave->cwd = fpu->fcw; | |
5107 | fxsave->swd = fpu->fsw; | |
5108 | fxsave->twd = fpu->ftwx; | |
5109 | fxsave->fop = fpu->last_opcode; | |
5110 | fxsave->rip = fpu->last_ip; | |
5111 | fxsave->rdp = fpu->last_dp; | |
5112 | memcpy(fxsave->xmm_space, fpu->xmm, sizeof fxsave->xmm_space); | |
5113 | ||
d0752060 HB |
5114 | return 0; |
5115 | } | |
5116 | ||
10ab25cd | 5117 | int fx_init(struct kvm_vcpu *vcpu) |
d0752060 | 5118 | { |
10ab25cd JK |
5119 | int err; |
5120 | ||
5121 | err = fpu_alloc(&vcpu->arch.guest_fpu); | |
5122 | if (err) | |
5123 | return err; | |
5124 | ||
98918833 | 5125 | fpu_finit(&vcpu->arch.guest_fpu); |
d0752060 | 5126 | |
ad312c7c | 5127 | vcpu->arch.cr0 |= X86_CR0_ET; |
10ab25cd JK |
5128 | |
5129 | return 0; | |
d0752060 HB |
5130 | } |
5131 | EXPORT_SYMBOL_GPL(fx_init); | |
5132 | ||
98918833 SY |
5133 | static void fx_free(struct kvm_vcpu *vcpu) |
5134 | { | |
5135 | fpu_free(&vcpu->arch.guest_fpu); | |
5136 | } | |
5137 | ||
d0752060 HB |
5138 | void kvm_load_guest_fpu(struct kvm_vcpu *vcpu) |
5139 | { | |
2608d7a1 | 5140 | if (vcpu->guest_fpu_loaded) |
d0752060 HB |
5141 | return; |
5142 | ||
5143 | vcpu->guest_fpu_loaded = 1; | |
7cf30855 | 5144 | unlazy_fpu(current); |
98918833 | 5145 | fpu_restore_checking(&vcpu->arch.guest_fpu); |
0c04851c | 5146 | trace_kvm_fpu(1); |
d0752060 | 5147 | } |
d0752060 HB |
5148 | |
5149 | void kvm_put_guest_fpu(struct kvm_vcpu *vcpu) | |
5150 | { | |
5151 | if (!vcpu->guest_fpu_loaded) | |
5152 | return; | |
5153 | ||
5154 | vcpu->guest_fpu_loaded = 0; | |
98918833 | 5155 | fpu_save_init(&vcpu->arch.guest_fpu); |
f096ed85 | 5156 | ++vcpu->stat.fpu_reload; |
02daab21 | 5157 | set_bit(KVM_REQ_DEACTIVATE_FPU, &vcpu->requests); |
0c04851c | 5158 | trace_kvm_fpu(0); |
d0752060 | 5159 | } |
e9b11c17 ZX |
5160 | |
5161 | void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu) | |
5162 | { | |
7f1ea208 JR |
5163 | if (vcpu->arch.time_page) { |
5164 | kvm_release_page_dirty(vcpu->arch.time_page); | |
5165 | vcpu->arch.time_page = NULL; | |
5166 | } | |
5167 | ||
98918833 | 5168 | fx_free(vcpu); |
e9b11c17 ZX |
5169 | kvm_x86_ops->vcpu_free(vcpu); |
5170 | } | |
5171 | ||
5172 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, | |
5173 | unsigned int id) | |
5174 | { | |
26e5215f AK |
5175 | return kvm_x86_ops->vcpu_create(kvm, id); |
5176 | } | |
e9b11c17 | 5177 | |
26e5215f AK |
5178 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) |
5179 | { | |
5180 | int r; | |
e9b11c17 | 5181 | |
0bed3b56 | 5182 | vcpu->arch.mtrr_state.have_fixed = 1; |
e9b11c17 ZX |
5183 | vcpu_load(vcpu); |
5184 | r = kvm_arch_vcpu_reset(vcpu); | |
5185 | if (r == 0) | |
5186 | r = kvm_mmu_setup(vcpu); | |
5187 | vcpu_put(vcpu); | |
5188 | if (r < 0) | |
5189 | goto free_vcpu; | |
5190 | ||
26e5215f | 5191 | return 0; |
e9b11c17 ZX |
5192 | free_vcpu: |
5193 | kvm_x86_ops->vcpu_free(vcpu); | |
26e5215f | 5194 | return r; |
e9b11c17 ZX |
5195 | } |
5196 | ||
d40ccc62 | 5197 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
e9b11c17 ZX |
5198 | { |
5199 | vcpu_load(vcpu); | |
5200 | kvm_mmu_unload(vcpu); | |
5201 | vcpu_put(vcpu); | |
5202 | ||
98918833 | 5203 | fx_free(vcpu); |
e9b11c17 ZX |
5204 | kvm_x86_ops->vcpu_free(vcpu); |
5205 | } | |
5206 | ||
5207 | int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu) | |
5208 | { | |
448fa4a9 JK |
5209 | vcpu->arch.nmi_pending = false; |
5210 | vcpu->arch.nmi_injected = false; | |
5211 | ||
42dbaa5a JK |
5212 | vcpu->arch.switch_db_regs = 0; |
5213 | memset(vcpu->arch.db, 0, sizeof(vcpu->arch.db)); | |
5214 | vcpu->arch.dr6 = DR6_FIXED_1; | |
5215 | vcpu->arch.dr7 = DR7_FIXED_1; | |
5216 | ||
e9b11c17 ZX |
5217 | return kvm_x86_ops->vcpu_reset(vcpu); |
5218 | } | |
5219 | ||
10474ae8 | 5220 | int kvm_arch_hardware_enable(void *garbage) |
e9b11c17 | 5221 | { |
0cca7907 ZA |
5222 | /* |
5223 | * Since this may be called from a hotplug notifcation, | |
5224 | * we can't get the CPU frequency directly. | |
5225 | */ | |
5226 | if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) { | |
5227 | int cpu = raw_smp_processor_id(); | |
5228 | per_cpu(cpu_tsc_khz, cpu) = 0; | |
5229 | } | |
18863bdd AK |
5230 | |
5231 | kvm_shared_msr_cpu_online(); | |
5232 | ||
10474ae8 | 5233 | return kvm_x86_ops->hardware_enable(garbage); |
e9b11c17 ZX |
5234 | } |
5235 | ||
5236 | void kvm_arch_hardware_disable(void *garbage) | |
5237 | { | |
5238 | kvm_x86_ops->hardware_disable(garbage); | |
3548bab5 | 5239 | drop_user_return_notifiers(garbage); |
e9b11c17 ZX |
5240 | } |
5241 | ||
5242 | int kvm_arch_hardware_setup(void) | |
5243 | { | |
5244 | return kvm_x86_ops->hardware_setup(); | |
5245 | } | |
5246 | ||
5247 | void kvm_arch_hardware_unsetup(void) | |
5248 | { | |
5249 | kvm_x86_ops->hardware_unsetup(); | |
5250 | } | |
5251 | ||
5252 | void kvm_arch_check_processor_compat(void *rtn) | |
5253 | { | |
5254 | kvm_x86_ops->check_processor_compatibility(rtn); | |
5255 | } | |
5256 | ||
5257 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) | |
5258 | { | |
5259 | struct page *page; | |
5260 | struct kvm *kvm; | |
5261 | int r; | |
5262 | ||
5263 | BUG_ON(vcpu->kvm == NULL); | |
5264 | kvm = vcpu->kvm; | |
5265 | ||
ad312c7c | 5266 | vcpu->arch.mmu.root_hpa = INVALID_PAGE; |
c5af89b6 | 5267 | if (!irqchip_in_kernel(kvm) || kvm_vcpu_is_bsp(vcpu)) |
a4535290 | 5268 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
e9b11c17 | 5269 | else |
a4535290 | 5270 | vcpu->arch.mp_state = KVM_MP_STATE_UNINITIALIZED; |
e9b11c17 ZX |
5271 | |
5272 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
5273 | if (!page) { | |
5274 | r = -ENOMEM; | |
5275 | goto fail; | |
5276 | } | |
ad312c7c | 5277 | vcpu->arch.pio_data = page_address(page); |
e9b11c17 ZX |
5278 | |
5279 | r = kvm_mmu_create(vcpu); | |
5280 | if (r < 0) | |
5281 | goto fail_free_pio_data; | |
5282 | ||
5283 | if (irqchip_in_kernel(kvm)) { | |
5284 | r = kvm_create_lapic(vcpu); | |
5285 | if (r < 0) | |
5286 | goto fail_mmu_destroy; | |
5287 | } | |
5288 | ||
890ca9ae HY |
5289 | vcpu->arch.mce_banks = kzalloc(KVM_MAX_MCE_BANKS * sizeof(u64) * 4, |
5290 | GFP_KERNEL); | |
5291 | if (!vcpu->arch.mce_banks) { | |
5292 | r = -ENOMEM; | |
443c39bc | 5293 | goto fail_free_lapic; |
890ca9ae HY |
5294 | } |
5295 | vcpu->arch.mcg_cap = KVM_MAX_MCE_BANKS; | |
5296 | ||
e9b11c17 | 5297 | return 0; |
443c39bc WY |
5298 | fail_free_lapic: |
5299 | kvm_free_lapic(vcpu); | |
e9b11c17 ZX |
5300 | fail_mmu_destroy: |
5301 | kvm_mmu_destroy(vcpu); | |
5302 | fail_free_pio_data: | |
ad312c7c | 5303 | free_page((unsigned long)vcpu->arch.pio_data); |
e9b11c17 ZX |
5304 | fail: |
5305 | return r; | |
5306 | } | |
5307 | ||
5308 | void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) | |
5309 | { | |
f656ce01 MT |
5310 | int idx; |
5311 | ||
36cb93fd | 5312 | kfree(vcpu->arch.mce_banks); |
e9b11c17 | 5313 | kvm_free_lapic(vcpu); |
f656ce01 | 5314 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
e9b11c17 | 5315 | kvm_mmu_destroy(vcpu); |
f656ce01 | 5316 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
ad312c7c | 5317 | free_page((unsigned long)vcpu->arch.pio_data); |
e9b11c17 | 5318 | } |
d19a9cd2 ZX |
5319 | |
5320 | struct kvm *kvm_arch_create_vm(void) | |
5321 | { | |
5322 | struct kvm *kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL); | |
5323 | ||
5324 | if (!kvm) | |
5325 | return ERR_PTR(-ENOMEM); | |
5326 | ||
fef9cce0 MT |
5327 | kvm->arch.aliases = kzalloc(sizeof(struct kvm_mem_aliases), GFP_KERNEL); |
5328 | if (!kvm->arch.aliases) { | |
5329 | kfree(kvm); | |
5330 | return ERR_PTR(-ENOMEM); | |
5331 | } | |
5332 | ||
f05e70ac | 5333 | INIT_LIST_HEAD(&kvm->arch.active_mmu_pages); |
4d5c5d0f | 5334 | INIT_LIST_HEAD(&kvm->arch.assigned_dev_head); |
d19a9cd2 | 5335 | |
5550af4d SY |
5336 | /* Reserve bit 0 of irq_sources_bitmap for userspace irq source */ |
5337 | set_bit(KVM_USERSPACE_IRQ_SOURCE_ID, &kvm->arch.irq_sources_bitmap); | |
5338 | ||
53f658b3 MT |
5339 | rdtscll(kvm->arch.vm_init_tsc); |
5340 | ||
d19a9cd2 ZX |
5341 | return kvm; |
5342 | } | |
5343 | ||
5344 | static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu) | |
5345 | { | |
5346 | vcpu_load(vcpu); | |
5347 | kvm_mmu_unload(vcpu); | |
5348 | vcpu_put(vcpu); | |
5349 | } | |
5350 | ||
5351 | static void kvm_free_vcpus(struct kvm *kvm) | |
5352 | { | |
5353 | unsigned int i; | |
988a2cae | 5354 | struct kvm_vcpu *vcpu; |
d19a9cd2 ZX |
5355 | |
5356 | /* | |
5357 | * Unpin any mmu pages first. | |
5358 | */ | |
988a2cae GN |
5359 | kvm_for_each_vcpu(i, vcpu, kvm) |
5360 | kvm_unload_vcpu_mmu(vcpu); | |
5361 | kvm_for_each_vcpu(i, vcpu, kvm) | |
5362 | kvm_arch_vcpu_free(vcpu); | |
5363 | ||
5364 | mutex_lock(&kvm->lock); | |
5365 | for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) | |
5366 | kvm->vcpus[i] = NULL; | |
d19a9cd2 | 5367 | |
988a2cae GN |
5368 | atomic_set(&kvm->online_vcpus, 0); |
5369 | mutex_unlock(&kvm->lock); | |
d19a9cd2 ZX |
5370 | } |
5371 | ||
ad8ba2cd SY |
5372 | void kvm_arch_sync_events(struct kvm *kvm) |
5373 | { | |
ba4cef31 | 5374 | kvm_free_all_assigned_devices(kvm); |
ad8ba2cd SY |
5375 | } |
5376 | ||
d19a9cd2 ZX |
5377 | void kvm_arch_destroy_vm(struct kvm *kvm) |
5378 | { | |
6eb55818 | 5379 | kvm_iommu_unmap_guest(kvm); |
7837699f | 5380 | kvm_free_pit(kvm); |
d7deeeb0 ZX |
5381 | kfree(kvm->arch.vpic); |
5382 | kfree(kvm->arch.vioapic); | |
d19a9cd2 ZX |
5383 | kvm_free_vcpus(kvm); |
5384 | kvm_free_physmem(kvm); | |
3d45830c AK |
5385 | if (kvm->arch.apic_access_page) |
5386 | put_page(kvm->arch.apic_access_page); | |
b7ebfb05 SY |
5387 | if (kvm->arch.ept_identity_pagetable) |
5388 | put_page(kvm->arch.ept_identity_pagetable); | |
64749204 | 5389 | cleanup_srcu_struct(&kvm->srcu); |
fef9cce0 | 5390 | kfree(kvm->arch.aliases); |
d19a9cd2 ZX |
5391 | kfree(kvm); |
5392 | } | |
0de10343 | 5393 | |
f7784b8e MT |
5394 | int kvm_arch_prepare_memory_region(struct kvm *kvm, |
5395 | struct kvm_memory_slot *memslot, | |
0de10343 | 5396 | struct kvm_memory_slot old, |
f7784b8e | 5397 | struct kvm_userspace_memory_region *mem, |
0de10343 ZX |
5398 | int user_alloc) |
5399 | { | |
f7784b8e | 5400 | int npages = memslot->npages; |
0de10343 ZX |
5401 | |
5402 | /*To keep backward compatibility with older userspace, | |
5403 | *x86 needs to hanlde !user_alloc case. | |
5404 | */ | |
5405 | if (!user_alloc) { | |
5406 | if (npages && !old.rmap) { | |
604b38ac AA |
5407 | unsigned long userspace_addr; |
5408 | ||
72dc67a6 | 5409 | down_write(¤t->mm->mmap_sem); |
604b38ac AA |
5410 | userspace_addr = do_mmap(NULL, 0, |
5411 | npages * PAGE_SIZE, | |
5412 | PROT_READ | PROT_WRITE, | |
acee3c04 | 5413 | MAP_PRIVATE | MAP_ANONYMOUS, |
604b38ac | 5414 | 0); |
72dc67a6 | 5415 | up_write(¤t->mm->mmap_sem); |
0de10343 | 5416 | |
604b38ac AA |
5417 | if (IS_ERR((void *)userspace_addr)) |
5418 | return PTR_ERR((void *)userspace_addr); | |
5419 | ||
604b38ac | 5420 | memslot->userspace_addr = userspace_addr; |
0de10343 ZX |
5421 | } |
5422 | } | |
5423 | ||
f7784b8e MT |
5424 | |
5425 | return 0; | |
5426 | } | |
5427 | ||
5428 | void kvm_arch_commit_memory_region(struct kvm *kvm, | |
5429 | struct kvm_userspace_memory_region *mem, | |
5430 | struct kvm_memory_slot old, | |
5431 | int user_alloc) | |
5432 | { | |
5433 | ||
5434 | int npages = mem->memory_size >> PAGE_SHIFT; | |
5435 | ||
5436 | if (!user_alloc && !old.user_alloc && old.rmap && !npages) { | |
5437 | int ret; | |
5438 | ||
5439 | down_write(¤t->mm->mmap_sem); | |
5440 | ret = do_munmap(current->mm, old.userspace_addr, | |
5441 | old.npages * PAGE_SIZE); | |
5442 | up_write(¤t->mm->mmap_sem); | |
5443 | if (ret < 0) | |
5444 | printk(KERN_WARNING | |
5445 | "kvm_vm_ioctl_set_memory_region: " | |
5446 | "failed to munmap memory\n"); | |
5447 | } | |
5448 | ||
7c8a83b7 | 5449 | spin_lock(&kvm->mmu_lock); |
f05e70ac | 5450 | if (!kvm->arch.n_requested_mmu_pages) { |
0de10343 ZX |
5451 | unsigned int nr_mmu_pages = kvm_mmu_calculate_mmu_pages(kvm); |
5452 | kvm_mmu_change_mmu_pages(kvm, nr_mmu_pages); | |
5453 | } | |
5454 | ||
5455 | kvm_mmu_slot_remove_write_access(kvm, mem->slot); | |
7c8a83b7 | 5456 | spin_unlock(&kvm->mmu_lock); |
0de10343 | 5457 | } |
1d737c8a | 5458 | |
34d4cb8f MT |
5459 | void kvm_arch_flush_shadow(struct kvm *kvm) |
5460 | { | |
5461 | kvm_mmu_zap_all(kvm); | |
8986ecc0 | 5462 | kvm_reload_remote_mmus(kvm); |
34d4cb8f MT |
5463 | } |
5464 | ||
1d737c8a ZX |
5465 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
5466 | { | |
a4535290 | 5467 | return vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE |
a1b37100 GN |
5468 | || vcpu->arch.mp_state == KVM_MP_STATE_SIPI_RECEIVED |
5469 | || vcpu->arch.nmi_pending || | |
5470 | (kvm_arch_interrupt_allowed(vcpu) && | |
5471 | kvm_cpu_has_interrupt(vcpu)); | |
1d737c8a | 5472 | } |
5736199a | 5473 | |
5736199a ZX |
5474 | void kvm_vcpu_kick(struct kvm_vcpu *vcpu) |
5475 | { | |
32f88400 MT |
5476 | int me; |
5477 | int cpu = vcpu->cpu; | |
5736199a ZX |
5478 | |
5479 | if (waitqueue_active(&vcpu->wq)) { | |
5480 | wake_up_interruptible(&vcpu->wq); | |
5481 | ++vcpu->stat.halt_wakeup; | |
5482 | } | |
32f88400 MT |
5483 | |
5484 | me = get_cpu(); | |
5485 | if (cpu != me && (unsigned)cpu < nr_cpu_ids && cpu_online(cpu)) | |
d94e1dc9 | 5486 | if (atomic_xchg(&vcpu->guest_mode, 0)) |
32f88400 | 5487 | smp_send_reschedule(cpu); |
e9571ed5 | 5488 | put_cpu(); |
5736199a | 5489 | } |
78646121 GN |
5490 | |
5491 | int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu) | |
5492 | { | |
5493 | return kvm_x86_ops->interrupt_allowed(vcpu); | |
5494 | } | |
229456fc | 5495 | |
f92653ee JK |
5496 | bool kvm_is_linear_rip(struct kvm_vcpu *vcpu, unsigned long linear_rip) |
5497 | { | |
5498 | unsigned long current_rip = kvm_rip_read(vcpu) + | |
5499 | get_segment_base(vcpu, VCPU_SREG_CS); | |
5500 | ||
5501 | return current_rip == linear_rip; | |
5502 | } | |
5503 | EXPORT_SYMBOL_GPL(kvm_is_linear_rip); | |
5504 | ||
94fe45da JK |
5505 | unsigned long kvm_get_rflags(struct kvm_vcpu *vcpu) |
5506 | { | |
5507 | unsigned long rflags; | |
5508 | ||
5509 | rflags = kvm_x86_ops->get_rflags(vcpu); | |
5510 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) | |
c310bac5 | 5511 | rflags &= ~X86_EFLAGS_TF; |
94fe45da JK |
5512 | return rflags; |
5513 | } | |
5514 | EXPORT_SYMBOL_GPL(kvm_get_rflags); | |
5515 | ||
5516 | void kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags) | |
5517 | { | |
5518 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP && | |
f92653ee | 5519 | kvm_is_linear_rip(vcpu, vcpu->arch.singlestep_rip)) |
c310bac5 | 5520 | rflags |= X86_EFLAGS_TF; |
94fe45da JK |
5521 | kvm_x86_ops->set_rflags(vcpu, rflags); |
5522 | } | |
5523 | EXPORT_SYMBOL_GPL(kvm_set_rflags); | |
5524 | ||
229456fc MT |
5525 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_exit); |
5526 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_inj_virq); | |
5527 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_page_fault); | |
5528 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_msr); | |
5529 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_cr); | |
0ac406de | 5530 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmrun); |
d8cabddf | 5531 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit); |
17897f36 | 5532 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit_inject); |
236649de | 5533 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intr_vmexit); |
ec1ff790 | 5534 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_invlpga); |
532a46b9 | 5535 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_skinit); |
2e554e8d | 5536 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intercepts); |