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Commit | Line | Data |
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043405e1 CO |
1 | /* |
2 | * Kernel-based Virtual Machine driver for Linux | |
3 | * | |
4 | * derived from drivers/kvm/kvm_main.c | |
5 | * | |
6 | * Copyright (C) 2006 Qumranet, Inc. | |
4d5c5d0f BAY |
7 | * Copyright (C) 2008 Qumranet, Inc. |
8 | * Copyright IBM Corporation, 2008 | |
043405e1 CO |
9 | * |
10 | * Authors: | |
11 | * Avi Kivity <avi@qumranet.com> | |
12 | * Yaniv Kamay <yaniv@qumranet.com> | |
4d5c5d0f BAY |
13 | * Amit Shah <amit.shah@qumranet.com> |
14 | * Ben-Ami Yassour <benami@il.ibm.com> | |
043405e1 CO |
15 | * |
16 | * This work is licensed under the terms of the GNU GPL, version 2. See | |
17 | * the COPYING file in the top-level directory. | |
18 | * | |
19 | */ | |
20 | ||
edf88417 | 21 | #include <linux/kvm_host.h> |
313a3dc7 | 22 | #include "irq.h" |
1d737c8a | 23 | #include "mmu.h" |
7837699f | 24 | #include "i8254.h" |
37817f29 | 25 | #include "tss.h" |
5fdbf976 | 26 | #include "kvm_cache_regs.h" |
26eef70c | 27 | #include "x86.h" |
313a3dc7 | 28 | |
18068523 | 29 | #include <linux/clocksource.h> |
4d5c5d0f | 30 | #include <linux/interrupt.h> |
313a3dc7 CO |
31 | #include <linux/kvm.h> |
32 | #include <linux/fs.h> | |
33 | #include <linux/vmalloc.h> | |
5fb76f9b | 34 | #include <linux/module.h> |
0de10343 | 35 | #include <linux/mman.h> |
2bacc55c | 36 | #include <linux/highmem.h> |
19de40a8 | 37 | #include <linux/iommu.h> |
62c476c7 | 38 | #include <linux/intel-iommu.h> |
c8076604 | 39 | #include <linux/cpufreq.h> |
18863bdd | 40 | #include <linux/user-return-notifier.h> |
aec51dc4 AK |
41 | #include <trace/events/kvm.h> |
42 | #undef TRACE_INCLUDE_FILE | |
229456fc MT |
43 | #define CREATE_TRACE_POINTS |
44 | #include "trace.h" | |
043405e1 | 45 | |
24f1e32c | 46 | #include <asm/debugreg.h> |
043405e1 | 47 | #include <asm/uaccess.h> |
d825ed0a | 48 | #include <asm/msr.h> |
a5f61300 | 49 | #include <asm/desc.h> |
0bed3b56 | 50 | #include <asm/mtrr.h> |
890ca9ae | 51 | #include <asm/mce.h> |
043405e1 | 52 | |
313a3dc7 | 53 | #define MAX_IO_MSRS 256 |
a03490ed CO |
54 | #define CR0_RESERVED_BITS \ |
55 | (~(unsigned long)(X86_CR0_PE | X86_CR0_MP | X86_CR0_EM | X86_CR0_TS \ | |
56 | | X86_CR0_ET | X86_CR0_NE | X86_CR0_WP | X86_CR0_AM \ | |
57 | | X86_CR0_NW | X86_CR0_CD | X86_CR0_PG)) | |
58 | #define CR4_RESERVED_BITS \ | |
59 | (~(unsigned long)(X86_CR4_VME | X86_CR4_PVI | X86_CR4_TSD | X86_CR4_DE\ | |
60 | | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_MCE \ | |
61 | | X86_CR4_PGE | X86_CR4_PCE | X86_CR4_OSFXSR \ | |
62 | | X86_CR4_OSXMMEXCPT | X86_CR4_VMXE)) | |
63 | ||
64 | #define CR8_RESERVED_BITS (~(unsigned long)X86_CR8_TPR) | |
890ca9ae HY |
65 | |
66 | #define KVM_MAX_MCE_BANKS 32 | |
67 | #define KVM_MCE_CAP_SUPPORTED MCG_CTL_P | |
68 | ||
50a37eb4 JR |
69 | /* EFER defaults: |
70 | * - enable syscall per default because its emulated by KVM | |
71 | * - enable LME and LMA per default on 64 bit KVM | |
72 | */ | |
73 | #ifdef CONFIG_X86_64 | |
74 | static u64 __read_mostly efer_reserved_bits = 0xfffffffffffffafeULL; | |
75 | #else | |
76 | static u64 __read_mostly efer_reserved_bits = 0xfffffffffffffffeULL; | |
77 | #endif | |
313a3dc7 | 78 | |
ba1389b7 AK |
79 | #define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM |
80 | #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU | |
417bc304 | 81 | |
cb142eb7 | 82 | static void update_cr8_intercept(struct kvm_vcpu *vcpu); |
674eea0f AK |
83 | static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2 *cpuid, |
84 | struct kvm_cpuid_entry2 __user *entries); | |
85 | ||
97896d04 | 86 | struct kvm_x86_ops *kvm_x86_ops; |
5fdbf976 | 87 | EXPORT_SYMBOL_GPL(kvm_x86_ops); |
97896d04 | 88 | |
ed85c068 AP |
89 | int ignore_msrs = 0; |
90 | module_param_named(ignore_msrs, ignore_msrs, bool, S_IRUGO | S_IWUSR); | |
91 | ||
18863bdd AK |
92 | #define KVM_NR_SHARED_MSRS 16 |
93 | ||
94 | struct kvm_shared_msrs_global { | |
95 | int nr; | |
2bf78fa7 | 96 | u32 msrs[KVM_NR_SHARED_MSRS]; |
18863bdd AK |
97 | }; |
98 | ||
99 | struct kvm_shared_msrs { | |
100 | struct user_return_notifier urn; | |
101 | bool registered; | |
2bf78fa7 SY |
102 | struct kvm_shared_msr_values { |
103 | u64 host; | |
104 | u64 curr; | |
105 | } values[KVM_NR_SHARED_MSRS]; | |
18863bdd AK |
106 | }; |
107 | ||
108 | static struct kvm_shared_msrs_global __read_mostly shared_msrs_global; | |
109 | static DEFINE_PER_CPU(struct kvm_shared_msrs, shared_msrs); | |
110 | ||
417bc304 | 111 | struct kvm_stats_debugfs_item debugfs_entries[] = { |
ba1389b7 AK |
112 | { "pf_fixed", VCPU_STAT(pf_fixed) }, |
113 | { "pf_guest", VCPU_STAT(pf_guest) }, | |
114 | { "tlb_flush", VCPU_STAT(tlb_flush) }, | |
115 | { "invlpg", VCPU_STAT(invlpg) }, | |
116 | { "exits", VCPU_STAT(exits) }, | |
117 | { "io_exits", VCPU_STAT(io_exits) }, | |
118 | { "mmio_exits", VCPU_STAT(mmio_exits) }, | |
119 | { "signal_exits", VCPU_STAT(signal_exits) }, | |
120 | { "irq_window", VCPU_STAT(irq_window_exits) }, | |
f08864b4 | 121 | { "nmi_window", VCPU_STAT(nmi_window_exits) }, |
ba1389b7 AK |
122 | { "halt_exits", VCPU_STAT(halt_exits) }, |
123 | { "halt_wakeup", VCPU_STAT(halt_wakeup) }, | |
f11c3a8d | 124 | { "hypercalls", VCPU_STAT(hypercalls) }, |
ba1389b7 AK |
125 | { "request_irq", VCPU_STAT(request_irq_exits) }, |
126 | { "irq_exits", VCPU_STAT(irq_exits) }, | |
127 | { "host_state_reload", VCPU_STAT(host_state_reload) }, | |
128 | { "efer_reload", VCPU_STAT(efer_reload) }, | |
129 | { "fpu_reload", VCPU_STAT(fpu_reload) }, | |
130 | { "insn_emulation", VCPU_STAT(insn_emulation) }, | |
131 | { "insn_emulation_fail", VCPU_STAT(insn_emulation_fail) }, | |
fa89a817 | 132 | { "irq_injections", VCPU_STAT(irq_injections) }, |
c4abb7c9 | 133 | { "nmi_injections", VCPU_STAT(nmi_injections) }, |
4cee5764 AK |
134 | { "mmu_shadow_zapped", VM_STAT(mmu_shadow_zapped) }, |
135 | { "mmu_pte_write", VM_STAT(mmu_pte_write) }, | |
136 | { "mmu_pte_updated", VM_STAT(mmu_pte_updated) }, | |
137 | { "mmu_pde_zapped", VM_STAT(mmu_pde_zapped) }, | |
138 | { "mmu_flooded", VM_STAT(mmu_flooded) }, | |
139 | { "mmu_recycled", VM_STAT(mmu_recycled) }, | |
dfc5aa00 | 140 | { "mmu_cache_miss", VM_STAT(mmu_cache_miss) }, |
4731d4c7 | 141 | { "mmu_unsync", VM_STAT(mmu_unsync) }, |
0f74a24c | 142 | { "remote_tlb_flush", VM_STAT(remote_tlb_flush) }, |
05da4558 | 143 | { "largepages", VM_STAT(lpages) }, |
417bc304 HB |
144 | { NULL } |
145 | }; | |
146 | ||
18863bdd AK |
147 | static void kvm_on_user_return(struct user_return_notifier *urn) |
148 | { | |
149 | unsigned slot; | |
18863bdd AK |
150 | struct kvm_shared_msrs *locals |
151 | = container_of(urn, struct kvm_shared_msrs, urn); | |
2bf78fa7 | 152 | struct kvm_shared_msr_values *values; |
18863bdd AK |
153 | |
154 | for (slot = 0; slot < shared_msrs_global.nr; ++slot) { | |
2bf78fa7 SY |
155 | values = &locals->values[slot]; |
156 | if (values->host != values->curr) { | |
157 | wrmsrl(shared_msrs_global.msrs[slot], values->host); | |
158 | values->curr = values->host; | |
18863bdd AK |
159 | } |
160 | } | |
161 | locals->registered = false; | |
162 | user_return_notifier_unregister(urn); | |
163 | } | |
164 | ||
2bf78fa7 | 165 | static void shared_msr_update(unsigned slot, u32 msr) |
18863bdd | 166 | { |
2bf78fa7 | 167 | struct kvm_shared_msrs *smsr; |
18863bdd AK |
168 | u64 value; |
169 | ||
2bf78fa7 SY |
170 | smsr = &__get_cpu_var(shared_msrs); |
171 | /* only read, and nobody should modify it at this time, | |
172 | * so don't need lock */ | |
173 | if (slot >= shared_msrs_global.nr) { | |
174 | printk(KERN_ERR "kvm: invalid MSR slot!"); | |
175 | return; | |
176 | } | |
177 | rdmsrl_safe(msr, &value); | |
178 | smsr->values[slot].host = value; | |
179 | smsr->values[slot].curr = value; | |
180 | } | |
181 | ||
182 | void kvm_define_shared_msr(unsigned slot, u32 msr) | |
183 | { | |
18863bdd AK |
184 | if (slot >= shared_msrs_global.nr) |
185 | shared_msrs_global.nr = slot + 1; | |
2bf78fa7 SY |
186 | shared_msrs_global.msrs[slot] = msr; |
187 | /* we need ensured the shared_msr_global have been updated */ | |
188 | smp_wmb(); | |
18863bdd AK |
189 | } |
190 | EXPORT_SYMBOL_GPL(kvm_define_shared_msr); | |
191 | ||
192 | static void kvm_shared_msr_cpu_online(void) | |
193 | { | |
194 | unsigned i; | |
18863bdd AK |
195 | |
196 | for (i = 0; i < shared_msrs_global.nr; ++i) | |
2bf78fa7 | 197 | shared_msr_update(i, shared_msrs_global.msrs[i]); |
18863bdd AK |
198 | } |
199 | ||
d5696725 | 200 | void kvm_set_shared_msr(unsigned slot, u64 value, u64 mask) |
18863bdd AK |
201 | { |
202 | struct kvm_shared_msrs *smsr = &__get_cpu_var(shared_msrs); | |
203 | ||
2bf78fa7 | 204 | if (((value ^ smsr->values[slot].curr) & mask) == 0) |
18863bdd | 205 | return; |
2bf78fa7 SY |
206 | smsr->values[slot].curr = value; |
207 | wrmsrl(shared_msrs_global.msrs[slot], value); | |
18863bdd AK |
208 | if (!smsr->registered) { |
209 | smsr->urn.on_user_return = kvm_on_user_return; | |
210 | user_return_notifier_register(&smsr->urn); | |
211 | smsr->registered = true; | |
212 | } | |
213 | } | |
214 | EXPORT_SYMBOL_GPL(kvm_set_shared_msr); | |
215 | ||
3548bab5 AK |
216 | static void drop_user_return_notifiers(void *ignore) |
217 | { | |
218 | struct kvm_shared_msrs *smsr = &__get_cpu_var(shared_msrs); | |
219 | ||
220 | if (smsr->registered) | |
221 | kvm_on_user_return(&smsr->urn); | |
222 | } | |
223 | ||
5fb76f9b CO |
224 | unsigned long segment_base(u16 selector) |
225 | { | |
226 | struct descriptor_table gdt; | |
a5f61300 | 227 | struct desc_struct *d; |
5fb76f9b CO |
228 | unsigned long table_base; |
229 | unsigned long v; | |
230 | ||
231 | if (selector == 0) | |
232 | return 0; | |
233 | ||
b792c344 | 234 | kvm_get_gdt(&gdt); |
5fb76f9b CO |
235 | table_base = gdt.base; |
236 | ||
237 | if (selector & 4) { /* from ldt */ | |
b792c344 | 238 | u16 ldt_selector = kvm_read_ldt(); |
5fb76f9b | 239 | |
5fb76f9b CO |
240 | table_base = segment_base(ldt_selector); |
241 | } | |
a5f61300 | 242 | d = (struct desc_struct *)(table_base + (selector & ~7)); |
46a359e7 | 243 | v = get_desc_base(d); |
5fb76f9b | 244 | #ifdef CONFIG_X86_64 |
a5f61300 AK |
245 | if (d->s == 0 && (d->type == 2 || d->type == 9 || d->type == 11)) |
246 | v |= ((unsigned long)((struct ldttss_desc64 *)d)->base3) << 32; | |
5fb76f9b CO |
247 | #endif |
248 | return v; | |
249 | } | |
250 | EXPORT_SYMBOL_GPL(segment_base); | |
251 | ||
6866b83e CO |
252 | u64 kvm_get_apic_base(struct kvm_vcpu *vcpu) |
253 | { | |
254 | if (irqchip_in_kernel(vcpu->kvm)) | |
ad312c7c | 255 | return vcpu->arch.apic_base; |
6866b83e | 256 | else |
ad312c7c | 257 | return vcpu->arch.apic_base; |
6866b83e CO |
258 | } |
259 | EXPORT_SYMBOL_GPL(kvm_get_apic_base); | |
260 | ||
261 | void kvm_set_apic_base(struct kvm_vcpu *vcpu, u64 data) | |
262 | { | |
263 | /* TODO: reserve bits check */ | |
264 | if (irqchip_in_kernel(vcpu->kvm)) | |
265 | kvm_lapic_set_base(vcpu, data); | |
266 | else | |
ad312c7c | 267 | vcpu->arch.apic_base = data; |
6866b83e CO |
268 | } |
269 | EXPORT_SYMBOL_GPL(kvm_set_apic_base); | |
270 | ||
3fd28fce ED |
271 | #define EXCPT_BENIGN 0 |
272 | #define EXCPT_CONTRIBUTORY 1 | |
273 | #define EXCPT_PF 2 | |
274 | ||
275 | static int exception_class(int vector) | |
276 | { | |
277 | switch (vector) { | |
278 | case PF_VECTOR: | |
279 | return EXCPT_PF; | |
280 | case DE_VECTOR: | |
281 | case TS_VECTOR: | |
282 | case NP_VECTOR: | |
283 | case SS_VECTOR: | |
284 | case GP_VECTOR: | |
285 | return EXCPT_CONTRIBUTORY; | |
286 | default: | |
287 | break; | |
288 | } | |
289 | return EXCPT_BENIGN; | |
290 | } | |
291 | ||
292 | static void kvm_multiple_exception(struct kvm_vcpu *vcpu, | |
293 | unsigned nr, bool has_error, u32 error_code) | |
294 | { | |
295 | u32 prev_nr; | |
296 | int class1, class2; | |
297 | ||
298 | if (!vcpu->arch.exception.pending) { | |
299 | queue: | |
300 | vcpu->arch.exception.pending = true; | |
301 | vcpu->arch.exception.has_error_code = has_error; | |
302 | vcpu->arch.exception.nr = nr; | |
303 | vcpu->arch.exception.error_code = error_code; | |
304 | return; | |
305 | } | |
306 | ||
307 | /* to check exception */ | |
308 | prev_nr = vcpu->arch.exception.nr; | |
309 | if (prev_nr == DF_VECTOR) { | |
310 | /* triple fault -> shutdown */ | |
311 | set_bit(KVM_REQ_TRIPLE_FAULT, &vcpu->requests); | |
312 | return; | |
313 | } | |
314 | class1 = exception_class(prev_nr); | |
315 | class2 = exception_class(nr); | |
316 | if ((class1 == EXCPT_CONTRIBUTORY && class2 == EXCPT_CONTRIBUTORY) | |
317 | || (class1 == EXCPT_PF && class2 != EXCPT_BENIGN)) { | |
318 | /* generate double fault per SDM Table 5-5 */ | |
319 | vcpu->arch.exception.pending = true; | |
320 | vcpu->arch.exception.has_error_code = true; | |
321 | vcpu->arch.exception.nr = DF_VECTOR; | |
322 | vcpu->arch.exception.error_code = 0; | |
323 | } else | |
324 | /* replace previous exception with a new one in a hope | |
325 | that instruction re-execution will regenerate lost | |
326 | exception */ | |
327 | goto queue; | |
328 | } | |
329 | ||
298101da AK |
330 | void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr) |
331 | { | |
3fd28fce | 332 | kvm_multiple_exception(vcpu, nr, false, 0); |
298101da AK |
333 | } |
334 | EXPORT_SYMBOL_GPL(kvm_queue_exception); | |
335 | ||
c3c91fee AK |
336 | void kvm_inject_page_fault(struct kvm_vcpu *vcpu, unsigned long addr, |
337 | u32 error_code) | |
338 | { | |
339 | ++vcpu->stat.pf_guest; | |
ad312c7c | 340 | vcpu->arch.cr2 = addr; |
c3c91fee AK |
341 | kvm_queue_exception_e(vcpu, PF_VECTOR, error_code); |
342 | } | |
343 | ||
3419ffc8 SY |
344 | void kvm_inject_nmi(struct kvm_vcpu *vcpu) |
345 | { | |
346 | vcpu->arch.nmi_pending = 1; | |
347 | } | |
348 | EXPORT_SYMBOL_GPL(kvm_inject_nmi); | |
349 | ||
298101da AK |
350 | void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code) |
351 | { | |
3fd28fce | 352 | kvm_multiple_exception(vcpu, nr, true, error_code); |
298101da AK |
353 | } |
354 | EXPORT_SYMBOL_GPL(kvm_queue_exception_e); | |
355 | ||
0a79b009 AK |
356 | /* |
357 | * Checks if cpl <= required_cpl; if true, return true. Otherwise queue | |
358 | * a #GP and return false. | |
359 | */ | |
360 | bool kvm_require_cpl(struct kvm_vcpu *vcpu, int required_cpl) | |
298101da | 361 | { |
0a79b009 AK |
362 | if (kvm_x86_ops->get_cpl(vcpu) <= required_cpl) |
363 | return true; | |
364 | kvm_queue_exception_e(vcpu, GP_VECTOR, 0); | |
365 | return false; | |
298101da | 366 | } |
0a79b009 | 367 | EXPORT_SYMBOL_GPL(kvm_require_cpl); |
298101da | 368 | |
a03490ed CO |
369 | /* |
370 | * Load the pae pdptrs. Return true is they are all valid. | |
371 | */ | |
372 | int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3) | |
373 | { | |
374 | gfn_t pdpt_gfn = cr3 >> PAGE_SHIFT; | |
375 | unsigned offset = ((cr3 & (PAGE_SIZE-1)) >> 5) << 2; | |
376 | int i; | |
377 | int ret; | |
ad312c7c | 378 | u64 pdpte[ARRAY_SIZE(vcpu->arch.pdptrs)]; |
a03490ed | 379 | |
a03490ed CO |
380 | ret = kvm_read_guest_page(vcpu->kvm, pdpt_gfn, pdpte, |
381 | offset * sizeof(u64), sizeof(pdpte)); | |
382 | if (ret < 0) { | |
383 | ret = 0; | |
384 | goto out; | |
385 | } | |
386 | for (i = 0; i < ARRAY_SIZE(pdpte); ++i) { | |
43a3795a | 387 | if (is_present_gpte(pdpte[i]) && |
20c466b5 | 388 | (pdpte[i] & vcpu->arch.mmu.rsvd_bits_mask[0][2])) { |
a03490ed CO |
389 | ret = 0; |
390 | goto out; | |
391 | } | |
392 | } | |
393 | ret = 1; | |
394 | ||
ad312c7c | 395 | memcpy(vcpu->arch.pdptrs, pdpte, sizeof(vcpu->arch.pdptrs)); |
6de4f3ad AK |
396 | __set_bit(VCPU_EXREG_PDPTR, |
397 | (unsigned long *)&vcpu->arch.regs_avail); | |
398 | __set_bit(VCPU_EXREG_PDPTR, | |
399 | (unsigned long *)&vcpu->arch.regs_dirty); | |
a03490ed | 400 | out: |
a03490ed CO |
401 | |
402 | return ret; | |
403 | } | |
cc4b6871 | 404 | EXPORT_SYMBOL_GPL(load_pdptrs); |
a03490ed | 405 | |
d835dfec AK |
406 | static bool pdptrs_changed(struct kvm_vcpu *vcpu) |
407 | { | |
ad312c7c | 408 | u64 pdpte[ARRAY_SIZE(vcpu->arch.pdptrs)]; |
d835dfec AK |
409 | bool changed = true; |
410 | int r; | |
411 | ||
412 | if (is_long_mode(vcpu) || !is_pae(vcpu)) | |
413 | return false; | |
414 | ||
6de4f3ad AK |
415 | if (!test_bit(VCPU_EXREG_PDPTR, |
416 | (unsigned long *)&vcpu->arch.regs_avail)) | |
417 | return true; | |
418 | ||
ad312c7c | 419 | r = kvm_read_guest(vcpu->kvm, vcpu->arch.cr3 & ~31u, pdpte, sizeof(pdpte)); |
d835dfec AK |
420 | if (r < 0) |
421 | goto out; | |
ad312c7c | 422 | changed = memcmp(pdpte, vcpu->arch.pdptrs, sizeof(pdpte)) != 0; |
d835dfec | 423 | out: |
d835dfec AK |
424 | |
425 | return changed; | |
426 | } | |
427 | ||
2d3ad1f4 | 428 | void kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) |
a03490ed CO |
429 | { |
430 | if (cr0 & CR0_RESERVED_BITS) { | |
431 | printk(KERN_DEBUG "set_cr0: 0x%lx #GP, reserved bits 0x%lx\n", | |
ad312c7c | 432 | cr0, vcpu->arch.cr0); |
c1a5d4f9 | 433 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
434 | return; |
435 | } | |
436 | ||
437 | if ((cr0 & X86_CR0_NW) && !(cr0 & X86_CR0_CD)) { | |
438 | printk(KERN_DEBUG "set_cr0: #GP, CD == 0 && NW == 1\n"); | |
c1a5d4f9 | 439 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
440 | return; |
441 | } | |
442 | ||
443 | if ((cr0 & X86_CR0_PG) && !(cr0 & X86_CR0_PE)) { | |
444 | printk(KERN_DEBUG "set_cr0: #GP, set PG flag " | |
445 | "and a clear PE flag\n"); | |
c1a5d4f9 | 446 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
447 | return; |
448 | } | |
449 | ||
450 | if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) { | |
451 | #ifdef CONFIG_X86_64 | |
ad312c7c | 452 | if ((vcpu->arch.shadow_efer & EFER_LME)) { |
a03490ed CO |
453 | int cs_db, cs_l; |
454 | ||
455 | if (!is_pae(vcpu)) { | |
456 | printk(KERN_DEBUG "set_cr0: #GP, start paging " | |
457 | "in long mode while PAE is disabled\n"); | |
c1a5d4f9 | 458 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
459 | return; |
460 | } | |
461 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); | |
462 | if (cs_l) { | |
463 | printk(KERN_DEBUG "set_cr0: #GP, start paging " | |
464 | "in long mode while CS.L == 1\n"); | |
c1a5d4f9 | 465 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
466 | return; |
467 | ||
468 | } | |
469 | } else | |
470 | #endif | |
ad312c7c | 471 | if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->arch.cr3)) { |
a03490ed CO |
472 | printk(KERN_DEBUG "set_cr0: #GP, pdptrs " |
473 | "reserved bits\n"); | |
c1a5d4f9 | 474 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
475 | return; |
476 | } | |
477 | ||
478 | } | |
479 | ||
480 | kvm_x86_ops->set_cr0(vcpu, cr0); | |
ad312c7c | 481 | vcpu->arch.cr0 = cr0; |
a03490ed | 482 | |
a03490ed | 483 | kvm_mmu_reset_context(vcpu); |
a03490ed CO |
484 | return; |
485 | } | |
2d3ad1f4 | 486 | EXPORT_SYMBOL_GPL(kvm_set_cr0); |
a03490ed | 487 | |
2d3ad1f4 | 488 | void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw) |
a03490ed | 489 | { |
2d3ad1f4 | 490 | kvm_set_cr0(vcpu, (vcpu->arch.cr0 & ~0x0ful) | (msw & 0x0f)); |
a03490ed | 491 | } |
2d3ad1f4 | 492 | EXPORT_SYMBOL_GPL(kvm_lmsw); |
a03490ed | 493 | |
2d3ad1f4 | 494 | void kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4) |
a03490ed | 495 | { |
fc78f519 | 496 | unsigned long old_cr4 = kvm_read_cr4(vcpu); |
a2edf57f AK |
497 | unsigned long pdptr_bits = X86_CR4_PGE | X86_CR4_PSE | X86_CR4_PAE; |
498 | ||
a03490ed CO |
499 | if (cr4 & CR4_RESERVED_BITS) { |
500 | printk(KERN_DEBUG "set_cr4: #GP, reserved bits\n"); | |
c1a5d4f9 | 501 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
502 | return; |
503 | } | |
504 | ||
505 | if (is_long_mode(vcpu)) { | |
506 | if (!(cr4 & X86_CR4_PAE)) { | |
507 | printk(KERN_DEBUG "set_cr4: #GP, clearing PAE while " | |
508 | "in long mode\n"); | |
c1a5d4f9 | 509 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
510 | return; |
511 | } | |
a2edf57f AK |
512 | } else if (is_paging(vcpu) && (cr4 & X86_CR4_PAE) |
513 | && ((cr4 ^ old_cr4) & pdptr_bits) | |
ad312c7c | 514 | && !load_pdptrs(vcpu, vcpu->arch.cr3)) { |
a03490ed | 515 | printk(KERN_DEBUG "set_cr4: #GP, pdptrs reserved bits\n"); |
c1a5d4f9 | 516 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
517 | return; |
518 | } | |
519 | ||
520 | if (cr4 & X86_CR4_VMXE) { | |
521 | printk(KERN_DEBUG "set_cr4: #GP, setting VMXE\n"); | |
c1a5d4f9 | 522 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
523 | return; |
524 | } | |
525 | kvm_x86_ops->set_cr4(vcpu, cr4); | |
ad312c7c | 526 | vcpu->arch.cr4 = cr4; |
5a41accd | 527 | vcpu->arch.mmu.base_role.cr4_pge = (cr4 & X86_CR4_PGE) && !tdp_enabled; |
a03490ed | 528 | kvm_mmu_reset_context(vcpu); |
a03490ed | 529 | } |
2d3ad1f4 | 530 | EXPORT_SYMBOL_GPL(kvm_set_cr4); |
a03490ed | 531 | |
2d3ad1f4 | 532 | void kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3) |
a03490ed | 533 | { |
ad312c7c | 534 | if (cr3 == vcpu->arch.cr3 && !pdptrs_changed(vcpu)) { |
0ba73cda | 535 | kvm_mmu_sync_roots(vcpu); |
d835dfec AK |
536 | kvm_mmu_flush_tlb(vcpu); |
537 | return; | |
538 | } | |
539 | ||
a03490ed CO |
540 | if (is_long_mode(vcpu)) { |
541 | if (cr3 & CR3_L_MODE_RESERVED_BITS) { | |
542 | printk(KERN_DEBUG "set_cr3: #GP, reserved bits\n"); | |
c1a5d4f9 | 543 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
544 | return; |
545 | } | |
546 | } else { | |
547 | if (is_pae(vcpu)) { | |
548 | if (cr3 & CR3_PAE_RESERVED_BITS) { | |
549 | printk(KERN_DEBUG | |
550 | "set_cr3: #GP, reserved bits\n"); | |
c1a5d4f9 | 551 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
552 | return; |
553 | } | |
554 | if (is_paging(vcpu) && !load_pdptrs(vcpu, cr3)) { | |
555 | printk(KERN_DEBUG "set_cr3: #GP, pdptrs " | |
556 | "reserved bits\n"); | |
c1a5d4f9 | 557 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
558 | return; |
559 | } | |
560 | } | |
561 | /* | |
562 | * We don't check reserved bits in nonpae mode, because | |
563 | * this isn't enforced, and VMware depends on this. | |
564 | */ | |
565 | } | |
566 | ||
a03490ed CO |
567 | /* |
568 | * Does the new cr3 value map to physical memory? (Note, we | |
569 | * catch an invalid cr3 even in real-mode, because it would | |
570 | * cause trouble later on when we turn on paging anyway.) | |
571 | * | |
572 | * A real CPU would silently accept an invalid cr3 and would | |
573 | * attempt to use it - with largely undefined (and often hard | |
574 | * to debug) behavior on the guest side. | |
575 | */ | |
576 | if (unlikely(!gfn_to_memslot(vcpu->kvm, cr3 >> PAGE_SHIFT))) | |
c1a5d4f9 | 577 | kvm_inject_gp(vcpu, 0); |
a03490ed | 578 | else { |
ad312c7c ZX |
579 | vcpu->arch.cr3 = cr3; |
580 | vcpu->arch.mmu.new_cr3(vcpu); | |
a03490ed | 581 | } |
a03490ed | 582 | } |
2d3ad1f4 | 583 | EXPORT_SYMBOL_GPL(kvm_set_cr3); |
a03490ed | 584 | |
2d3ad1f4 | 585 | void kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8) |
a03490ed CO |
586 | { |
587 | if (cr8 & CR8_RESERVED_BITS) { | |
588 | printk(KERN_DEBUG "set_cr8: #GP, reserved bits 0x%lx\n", cr8); | |
c1a5d4f9 | 589 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
590 | return; |
591 | } | |
592 | if (irqchip_in_kernel(vcpu->kvm)) | |
593 | kvm_lapic_set_tpr(vcpu, cr8); | |
594 | else | |
ad312c7c | 595 | vcpu->arch.cr8 = cr8; |
a03490ed | 596 | } |
2d3ad1f4 | 597 | EXPORT_SYMBOL_GPL(kvm_set_cr8); |
a03490ed | 598 | |
2d3ad1f4 | 599 | unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu) |
a03490ed CO |
600 | { |
601 | if (irqchip_in_kernel(vcpu->kvm)) | |
602 | return kvm_lapic_get_cr8(vcpu); | |
603 | else | |
ad312c7c | 604 | return vcpu->arch.cr8; |
a03490ed | 605 | } |
2d3ad1f4 | 606 | EXPORT_SYMBOL_GPL(kvm_get_cr8); |
a03490ed | 607 | |
d8017474 AG |
608 | static inline u32 bit(int bitno) |
609 | { | |
610 | return 1 << (bitno & 31); | |
611 | } | |
612 | ||
043405e1 CO |
613 | /* |
614 | * List of msr numbers which we expose to userspace through KVM_GET_MSRS | |
615 | * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST. | |
616 | * | |
617 | * This list is modified at module load time to reflect the | |
e3267cbb GC |
618 | * capabilities of the host cpu. This capabilities test skips MSRs that are |
619 | * kvm-specific. Those are put in the beginning of the list. | |
043405e1 | 620 | */ |
e3267cbb GC |
621 | |
622 | #define KVM_SAVE_MSRS_BEGIN 2 | |
043405e1 | 623 | static u32 msrs_to_save[] = { |
e3267cbb | 624 | MSR_KVM_SYSTEM_TIME, MSR_KVM_WALL_CLOCK, |
043405e1 CO |
625 | MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP, |
626 | MSR_K6_STAR, | |
627 | #ifdef CONFIG_X86_64 | |
628 | MSR_CSTAR, MSR_KERNEL_GS_BASE, MSR_SYSCALL_MASK, MSR_LSTAR, | |
629 | #endif | |
e3267cbb | 630 | MSR_IA32_TSC, MSR_IA32_PERF_STATUS, MSR_IA32_CR_PAT, MSR_VM_HSAVE_PA |
043405e1 CO |
631 | }; |
632 | ||
633 | static unsigned num_msrs_to_save; | |
634 | ||
635 | static u32 emulated_msrs[] = { | |
636 | MSR_IA32_MISC_ENABLE, | |
637 | }; | |
638 | ||
15c4a640 CO |
639 | static void set_efer(struct kvm_vcpu *vcpu, u64 efer) |
640 | { | |
f2b4b7dd | 641 | if (efer & efer_reserved_bits) { |
15c4a640 CO |
642 | printk(KERN_DEBUG "set_efer: 0x%llx #GP, reserved bits\n", |
643 | efer); | |
c1a5d4f9 | 644 | kvm_inject_gp(vcpu, 0); |
15c4a640 CO |
645 | return; |
646 | } | |
647 | ||
648 | if (is_paging(vcpu) | |
ad312c7c | 649 | && (vcpu->arch.shadow_efer & EFER_LME) != (efer & EFER_LME)) { |
15c4a640 | 650 | printk(KERN_DEBUG "set_efer: #GP, change LME while paging\n"); |
c1a5d4f9 | 651 | kvm_inject_gp(vcpu, 0); |
15c4a640 CO |
652 | return; |
653 | } | |
654 | ||
1b2fd70c AG |
655 | if (efer & EFER_FFXSR) { |
656 | struct kvm_cpuid_entry2 *feat; | |
657 | ||
658 | feat = kvm_find_cpuid_entry(vcpu, 0x80000001, 0); | |
659 | if (!feat || !(feat->edx & bit(X86_FEATURE_FXSR_OPT))) { | |
660 | printk(KERN_DEBUG "set_efer: #GP, enable FFXSR w/o CPUID capability\n"); | |
661 | kvm_inject_gp(vcpu, 0); | |
662 | return; | |
663 | } | |
664 | } | |
665 | ||
d8017474 AG |
666 | if (efer & EFER_SVME) { |
667 | struct kvm_cpuid_entry2 *feat; | |
668 | ||
669 | feat = kvm_find_cpuid_entry(vcpu, 0x80000001, 0); | |
670 | if (!feat || !(feat->ecx & bit(X86_FEATURE_SVM))) { | |
671 | printk(KERN_DEBUG "set_efer: #GP, enable SVM w/o SVM\n"); | |
672 | kvm_inject_gp(vcpu, 0); | |
673 | return; | |
674 | } | |
675 | } | |
676 | ||
15c4a640 CO |
677 | kvm_x86_ops->set_efer(vcpu, efer); |
678 | ||
679 | efer &= ~EFER_LMA; | |
ad312c7c | 680 | efer |= vcpu->arch.shadow_efer & EFER_LMA; |
15c4a640 | 681 | |
ad312c7c | 682 | vcpu->arch.shadow_efer = efer; |
9645bb56 AK |
683 | |
684 | vcpu->arch.mmu.base_role.nxe = (efer & EFER_NX) && !tdp_enabled; | |
685 | kvm_mmu_reset_context(vcpu); | |
15c4a640 CO |
686 | } |
687 | ||
f2b4b7dd JR |
688 | void kvm_enable_efer_bits(u64 mask) |
689 | { | |
690 | efer_reserved_bits &= ~mask; | |
691 | } | |
692 | EXPORT_SYMBOL_GPL(kvm_enable_efer_bits); | |
693 | ||
694 | ||
15c4a640 CO |
695 | /* |
696 | * Writes msr value into into the appropriate "register". | |
697 | * Returns 0 on success, non-0 otherwise. | |
698 | * Assumes vcpu_load() was already called. | |
699 | */ | |
700 | int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data) | |
701 | { | |
702 | return kvm_x86_ops->set_msr(vcpu, msr_index, data); | |
703 | } | |
704 | ||
313a3dc7 CO |
705 | /* |
706 | * Adapt set_msr() to msr_io()'s calling convention | |
707 | */ | |
708 | static int do_set_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data) | |
709 | { | |
710 | return kvm_set_msr(vcpu, index, *data); | |
711 | } | |
712 | ||
18068523 GOC |
713 | static void kvm_write_wall_clock(struct kvm *kvm, gpa_t wall_clock) |
714 | { | |
715 | static int version; | |
50d0a0f9 | 716 | struct pvclock_wall_clock wc; |
923de3cf | 717 | struct timespec boot; |
18068523 GOC |
718 | |
719 | if (!wall_clock) | |
720 | return; | |
721 | ||
722 | version++; | |
723 | ||
18068523 GOC |
724 | kvm_write_guest(kvm, wall_clock, &version, sizeof(version)); |
725 | ||
50d0a0f9 GH |
726 | /* |
727 | * The guest calculates current wall clock time by adding | |
728 | * system time (updated by kvm_write_guest_time below) to the | |
729 | * wall clock specified here. guest system time equals host | |
730 | * system time for us, thus we must fill in host boot time here. | |
731 | */ | |
923de3cf | 732 | getboottime(&boot); |
50d0a0f9 GH |
733 | |
734 | wc.sec = boot.tv_sec; | |
735 | wc.nsec = boot.tv_nsec; | |
736 | wc.version = version; | |
18068523 GOC |
737 | |
738 | kvm_write_guest(kvm, wall_clock, &wc, sizeof(wc)); | |
739 | ||
740 | version++; | |
741 | kvm_write_guest(kvm, wall_clock, &version, sizeof(version)); | |
18068523 GOC |
742 | } |
743 | ||
50d0a0f9 GH |
744 | static uint32_t div_frac(uint32_t dividend, uint32_t divisor) |
745 | { | |
746 | uint32_t quotient, remainder; | |
747 | ||
748 | /* Don't try to replace with do_div(), this one calculates | |
749 | * "(dividend << 32) / divisor" */ | |
750 | __asm__ ( "divl %4" | |
751 | : "=a" (quotient), "=d" (remainder) | |
752 | : "0" (0), "1" (dividend), "r" (divisor) ); | |
753 | return quotient; | |
754 | } | |
755 | ||
756 | static void kvm_set_time_scale(uint32_t tsc_khz, struct pvclock_vcpu_time_info *hv_clock) | |
757 | { | |
758 | uint64_t nsecs = 1000000000LL; | |
759 | int32_t shift = 0; | |
760 | uint64_t tps64; | |
761 | uint32_t tps32; | |
762 | ||
763 | tps64 = tsc_khz * 1000LL; | |
764 | while (tps64 > nsecs*2) { | |
765 | tps64 >>= 1; | |
766 | shift--; | |
767 | } | |
768 | ||
769 | tps32 = (uint32_t)tps64; | |
770 | while (tps32 <= (uint32_t)nsecs) { | |
771 | tps32 <<= 1; | |
772 | shift++; | |
773 | } | |
774 | ||
775 | hv_clock->tsc_shift = shift; | |
776 | hv_clock->tsc_to_system_mul = div_frac(nsecs, tps32); | |
777 | ||
778 | pr_debug("%s: tsc_khz %u, tsc_shift %d, tsc_mul %u\n", | |
80a914dc | 779 | __func__, tsc_khz, hv_clock->tsc_shift, |
50d0a0f9 GH |
780 | hv_clock->tsc_to_system_mul); |
781 | } | |
782 | ||
c8076604 GH |
783 | static DEFINE_PER_CPU(unsigned long, cpu_tsc_khz); |
784 | ||
18068523 GOC |
785 | static void kvm_write_guest_time(struct kvm_vcpu *v) |
786 | { | |
787 | struct timespec ts; | |
788 | unsigned long flags; | |
789 | struct kvm_vcpu_arch *vcpu = &v->arch; | |
790 | void *shared_kaddr; | |
463656c0 | 791 | unsigned long this_tsc_khz; |
18068523 GOC |
792 | |
793 | if ((!vcpu->time_page)) | |
794 | return; | |
795 | ||
463656c0 AK |
796 | this_tsc_khz = get_cpu_var(cpu_tsc_khz); |
797 | if (unlikely(vcpu->hv_clock_tsc_khz != this_tsc_khz)) { | |
798 | kvm_set_time_scale(this_tsc_khz, &vcpu->hv_clock); | |
799 | vcpu->hv_clock_tsc_khz = this_tsc_khz; | |
50d0a0f9 | 800 | } |
463656c0 | 801 | put_cpu_var(cpu_tsc_khz); |
50d0a0f9 | 802 | |
18068523 GOC |
803 | /* Keep irq disabled to prevent changes to the clock */ |
804 | local_irq_save(flags); | |
af24a4e4 | 805 | kvm_get_msr(v, MSR_IA32_TSC, &vcpu->hv_clock.tsc_timestamp); |
18068523 | 806 | ktime_get_ts(&ts); |
923de3cf | 807 | monotonic_to_bootbased(&ts); |
18068523 GOC |
808 | local_irq_restore(flags); |
809 | ||
810 | /* With all the info we got, fill in the values */ | |
811 | ||
812 | vcpu->hv_clock.system_time = ts.tv_nsec + | |
afbcf7ab GC |
813 | (NSEC_PER_SEC * (u64)ts.tv_sec) + v->kvm->arch.kvmclock_offset; |
814 | ||
18068523 GOC |
815 | /* |
816 | * The interface expects us to write an even number signaling that the | |
817 | * update is finished. Since the guest won't see the intermediate | |
50d0a0f9 | 818 | * state, we just increase by 2 at the end. |
18068523 | 819 | */ |
50d0a0f9 | 820 | vcpu->hv_clock.version += 2; |
18068523 GOC |
821 | |
822 | shared_kaddr = kmap_atomic(vcpu->time_page, KM_USER0); | |
823 | ||
824 | memcpy(shared_kaddr + vcpu->time_offset, &vcpu->hv_clock, | |
50d0a0f9 | 825 | sizeof(vcpu->hv_clock)); |
18068523 GOC |
826 | |
827 | kunmap_atomic(shared_kaddr, KM_USER0); | |
828 | ||
829 | mark_page_dirty(v->kvm, vcpu->time >> PAGE_SHIFT); | |
830 | } | |
831 | ||
c8076604 GH |
832 | static int kvm_request_guest_time_update(struct kvm_vcpu *v) |
833 | { | |
834 | struct kvm_vcpu_arch *vcpu = &v->arch; | |
835 | ||
836 | if (!vcpu->time_page) | |
837 | return 0; | |
838 | set_bit(KVM_REQ_KVMCLOCK_UPDATE, &v->requests); | |
839 | return 1; | |
840 | } | |
841 | ||
9ba075a6 AK |
842 | static bool msr_mtrr_valid(unsigned msr) |
843 | { | |
844 | switch (msr) { | |
845 | case 0x200 ... 0x200 + 2 * KVM_NR_VAR_MTRR - 1: | |
846 | case MSR_MTRRfix64K_00000: | |
847 | case MSR_MTRRfix16K_80000: | |
848 | case MSR_MTRRfix16K_A0000: | |
849 | case MSR_MTRRfix4K_C0000: | |
850 | case MSR_MTRRfix4K_C8000: | |
851 | case MSR_MTRRfix4K_D0000: | |
852 | case MSR_MTRRfix4K_D8000: | |
853 | case MSR_MTRRfix4K_E0000: | |
854 | case MSR_MTRRfix4K_E8000: | |
855 | case MSR_MTRRfix4K_F0000: | |
856 | case MSR_MTRRfix4K_F8000: | |
857 | case MSR_MTRRdefType: | |
858 | case MSR_IA32_CR_PAT: | |
859 | return true; | |
860 | case 0x2f8: | |
861 | return true; | |
862 | } | |
863 | return false; | |
864 | } | |
865 | ||
d6289b93 MT |
866 | static bool valid_pat_type(unsigned t) |
867 | { | |
868 | return t < 8 && (1 << t) & 0xf3; /* 0, 1, 4, 5, 6, 7 */ | |
869 | } | |
870 | ||
871 | static bool valid_mtrr_type(unsigned t) | |
872 | { | |
873 | return t < 8 && (1 << t) & 0x73; /* 0, 1, 4, 5, 6 */ | |
874 | } | |
875 | ||
876 | static bool mtrr_valid(struct kvm_vcpu *vcpu, u32 msr, u64 data) | |
877 | { | |
878 | int i; | |
879 | ||
880 | if (!msr_mtrr_valid(msr)) | |
881 | return false; | |
882 | ||
883 | if (msr == MSR_IA32_CR_PAT) { | |
884 | for (i = 0; i < 8; i++) | |
885 | if (!valid_pat_type((data >> (i * 8)) & 0xff)) | |
886 | return false; | |
887 | return true; | |
888 | } else if (msr == MSR_MTRRdefType) { | |
889 | if (data & ~0xcff) | |
890 | return false; | |
891 | return valid_mtrr_type(data & 0xff); | |
892 | } else if (msr >= MSR_MTRRfix64K_00000 && msr <= MSR_MTRRfix4K_F8000) { | |
893 | for (i = 0; i < 8 ; i++) | |
894 | if (!valid_mtrr_type((data >> (i * 8)) & 0xff)) | |
895 | return false; | |
896 | return true; | |
897 | } | |
898 | ||
899 | /* variable MTRRs */ | |
900 | return valid_mtrr_type(data & 0xff); | |
901 | } | |
902 | ||
9ba075a6 AK |
903 | static int set_msr_mtrr(struct kvm_vcpu *vcpu, u32 msr, u64 data) |
904 | { | |
0bed3b56 SY |
905 | u64 *p = (u64 *)&vcpu->arch.mtrr_state.fixed_ranges; |
906 | ||
d6289b93 | 907 | if (!mtrr_valid(vcpu, msr, data)) |
9ba075a6 AK |
908 | return 1; |
909 | ||
0bed3b56 SY |
910 | if (msr == MSR_MTRRdefType) { |
911 | vcpu->arch.mtrr_state.def_type = data; | |
912 | vcpu->arch.mtrr_state.enabled = (data & 0xc00) >> 10; | |
913 | } else if (msr == MSR_MTRRfix64K_00000) | |
914 | p[0] = data; | |
915 | else if (msr == MSR_MTRRfix16K_80000 || msr == MSR_MTRRfix16K_A0000) | |
916 | p[1 + msr - MSR_MTRRfix16K_80000] = data; | |
917 | else if (msr >= MSR_MTRRfix4K_C0000 && msr <= MSR_MTRRfix4K_F8000) | |
918 | p[3 + msr - MSR_MTRRfix4K_C0000] = data; | |
919 | else if (msr == MSR_IA32_CR_PAT) | |
920 | vcpu->arch.pat = data; | |
921 | else { /* Variable MTRRs */ | |
922 | int idx, is_mtrr_mask; | |
923 | u64 *pt; | |
924 | ||
925 | idx = (msr - 0x200) / 2; | |
926 | is_mtrr_mask = msr - 0x200 - 2 * idx; | |
927 | if (!is_mtrr_mask) | |
928 | pt = | |
929 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].base_lo; | |
930 | else | |
931 | pt = | |
932 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].mask_lo; | |
933 | *pt = data; | |
934 | } | |
935 | ||
936 | kvm_mmu_reset_context(vcpu); | |
9ba075a6 AK |
937 | return 0; |
938 | } | |
15c4a640 | 939 | |
890ca9ae | 940 | static int set_msr_mce(struct kvm_vcpu *vcpu, u32 msr, u64 data) |
15c4a640 | 941 | { |
890ca9ae HY |
942 | u64 mcg_cap = vcpu->arch.mcg_cap; |
943 | unsigned bank_num = mcg_cap & 0xff; | |
944 | ||
15c4a640 | 945 | switch (msr) { |
15c4a640 | 946 | case MSR_IA32_MCG_STATUS: |
890ca9ae | 947 | vcpu->arch.mcg_status = data; |
15c4a640 | 948 | break; |
c7ac679c | 949 | case MSR_IA32_MCG_CTL: |
890ca9ae HY |
950 | if (!(mcg_cap & MCG_CTL_P)) |
951 | return 1; | |
952 | if (data != 0 && data != ~(u64)0) | |
953 | return -1; | |
954 | vcpu->arch.mcg_ctl = data; | |
955 | break; | |
956 | default: | |
957 | if (msr >= MSR_IA32_MC0_CTL && | |
958 | msr < MSR_IA32_MC0_CTL + 4 * bank_num) { | |
959 | u32 offset = msr - MSR_IA32_MC0_CTL; | |
960 | /* only 0 or all 1s can be written to IA32_MCi_CTL */ | |
961 | if ((offset & 0x3) == 0 && | |
962 | data != 0 && data != ~(u64)0) | |
963 | return -1; | |
964 | vcpu->arch.mce_banks[offset] = data; | |
965 | break; | |
966 | } | |
967 | return 1; | |
968 | } | |
969 | return 0; | |
970 | } | |
971 | ||
ffde22ac ES |
972 | static int xen_hvm_config(struct kvm_vcpu *vcpu, u64 data) |
973 | { | |
974 | struct kvm *kvm = vcpu->kvm; | |
975 | int lm = is_long_mode(vcpu); | |
976 | u8 *blob_addr = lm ? (u8 *)(long)kvm->arch.xen_hvm_config.blob_addr_64 | |
977 | : (u8 *)(long)kvm->arch.xen_hvm_config.blob_addr_32; | |
978 | u8 blob_size = lm ? kvm->arch.xen_hvm_config.blob_size_64 | |
979 | : kvm->arch.xen_hvm_config.blob_size_32; | |
980 | u32 page_num = data & ~PAGE_MASK; | |
981 | u64 page_addr = data & PAGE_MASK; | |
982 | u8 *page; | |
983 | int r; | |
984 | ||
985 | r = -E2BIG; | |
986 | if (page_num >= blob_size) | |
987 | goto out; | |
988 | r = -ENOMEM; | |
989 | page = kzalloc(PAGE_SIZE, GFP_KERNEL); | |
990 | if (!page) | |
991 | goto out; | |
992 | r = -EFAULT; | |
993 | if (copy_from_user(page, blob_addr + (page_num * PAGE_SIZE), PAGE_SIZE)) | |
994 | goto out_free; | |
995 | if (kvm_write_guest(kvm, page_addr, page, PAGE_SIZE)) | |
996 | goto out_free; | |
997 | r = 0; | |
998 | out_free: | |
999 | kfree(page); | |
1000 | out: | |
1001 | return r; | |
1002 | } | |
1003 | ||
15c4a640 CO |
1004 | int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data) |
1005 | { | |
1006 | switch (msr) { | |
15c4a640 CO |
1007 | case MSR_EFER: |
1008 | set_efer(vcpu, data); | |
1009 | break; | |
8f1589d9 AP |
1010 | case MSR_K7_HWCR: |
1011 | data &= ~(u64)0x40; /* ignore flush filter disable */ | |
1012 | if (data != 0) { | |
1013 | pr_unimpl(vcpu, "unimplemented HWCR wrmsr: 0x%llx\n", | |
1014 | data); | |
1015 | return 1; | |
1016 | } | |
15c4a640 | 1017 | break; |
f7c6d140 AP |
1018 | case MSR_FAM10H_MMIO_CONF_BASE: |
1019 | if (data != 0) { | |
1020 | pr_unimpl(vcpu, "unimplemented MMIO_CONF_BASE wrmsr: " | |
1021 | "0x%llx\n", data); | |
1022 | return 1; | |
1023 | } | |
15c4a640 | 1024 | break; |
c323c0e5 | 1025 | case MSR_AMD64_NB_CFG: |
c7ac679c | 1026 | break; |
b5e2fec0 AG |
1027 | case MSR_IA32_DEBUGCTLMSR: |
1028 | if (!data) { | |
1029 | /* We support the non-activated case already */ | |
1030 | break; | |
1031 | } else if (data & ~(DEBUGCTLMSR_LBR | DEBUGCTLMSR_BTF)) { | |
1032 | /* Values other than LBR and BTF are vendor-specific, | |
1033 | thus reserved and should throw a #GP */ | |
1034 | return 1; | |
1035 | } | |
1036 | pr_unimpl(vcpu, "%s: MSR_IA32_DEBUGCTLMSR 0x%llx, nop\n", | |
1037 | __func__, data); | |
1038 | break; | |
15c4a640 CO |
1039 | case MSR_IA32_UCODE_REV: |
1040 | case MSR_IA32_UCODE_WRITE: | |
61a6bd67 | 1041 | case MSR_VM_HSAVE_PA: |
6098ca93 | 1042 | case MSR_AMD64_PATCH_LOADER: |
15c4a640 | 1043 | break; |
9ba075a6 AK |
1044 | case 0x200 ... 0x2ff: |
1045 | return set_msr_mtrr(vcpu, msr, data); | |
15c4a640 CO |
1046 | case MSR_IA32_APICBASE: |
1047 | kvm_set_apic_base(vcpu, data); | |
1048 | break; | |
0105d1a5 GN |
1049 | case APIC_BASE_MSR ... APIC_BASE_MSR + 0x3ff: |
1050 | return kvm_x2apic_msr_write(vcpu, msr, data); | |
15c4a640 | 1051 | case MSR_IA32_MISC_ENABLE: |
ad312c7c | 1052 | vcpu->arch.ia32_misc_enable_msr = data; |
15c4a640 | 1053 | break; |
18068523 GOC |
1054 | case MSR_KVM_WALL_CLOCK: |
1055 | vcpu->kvm->arch.wall_clock = data; | |
1056 | kvm_write_wall_clock(vcpu->kvm, data); | |
1057 | break; | |
1058 | case MSR_KVM_SYSTEM_TIME: { | |
1059 | if (vcpu->arch.time_page) { | |
1060 | kvm_release_page_dirty(vcpu->arch.time_page); | |
1061 | vcpu->arch.time_page = NULL; | |
1062 | } | |
1063 | ||
1064 | vcpu->arch.time = data; | |
1065 | ||
1066 | /* we verify if the enable bit is set... */ | |
1067 | if (!(data & 1)) | |
1068 | break; | |
1069 | ||
1070 | /* ...but clean it before doing the actual write */ | |
1071 | vcpu->arch.time_offset = data & ~(PAGE_MASK | 1); | |
1072 | ||
18068523 GOC |
1073 | vcpu->arch.time_page = |
1074 | gfn_to_page(vcpu->kvm, data >> PAGE_SHIFT); | |
18068523 GOC |
1075 | |
1076 | if (is_error_page(vcpu->arch.time_page)) { | |
1077 | kvm_release_page_clean(vcpu->arch.time_page); | |
1078 | vcpu->arch.time_page = NULL; | |
1079 | } | |
1080 | ||
c8076604 | 1081 | kvm_request_guest_time_update(vcpu); |
18068523 GOC |
1082 | break; |
1083 | } | |
890ca9ae HY |
1084 | case MSR_IA32_MCG_CTL: |
1085 | case MSR_IA32_MCG_STATUS: | |
1086 | case MSR_IA32_MC0_CTL ... MSR_IA32_MC0_CTL + 4 * KVM_MAX_MCE_BANKS - 1: | |
1087 | return set_msr_mce(vcpu, msr, data); | |
71db6023 AP |
1088 | |
1089 | /* Performance counters are not protected by a CPUID bit, | |
1090 | * so we should check all of them in the generic path for the sake of | |
1091 | * cross vendor migration. | |
1092 | * Writing a zero into the event select MSRs disables them, | |
1093 | * which we perfectly emulate ;-). Any other value should be at least | |
1094 | * reported, some guests depend on them. | |
1095 | */ | |
1096 | case MSR_P6_EVNTSEL0: | |
1097 | case MSR_P6_EVNTSEL1: | |
1098 | case MSR_K7_EVNTSEL0: | |
1099 | case MSR_K7_EVNTSEL1: | |
1100 | case MSR_K7_EVNTSEL2: | |
1101 | case MSR_K7_EVNTSEL3: | |
1102 | if (data != 0) | |
1103 | pr_unimpl(vcpu, "unimplemented perfctr wrmsr: " | |
1104 | "0x%x data 0x%llx\n", msr, data); | |
1105 | break; | |
1106 | /* at least RHEL 4 unconditionally writes to the perfctr registers, | |
1107 | * so we ignore writes to make it happy. | |
1108 | */ | |
1109 | case MSR_P6_PERFCTR0: | |
1110 | case MSR_P6_PERFCTR1: | |
1111 | case MSR_K7_PERFCTR0: | |
1112 | case MSR_K7_PERFCTR1: | |
1113 | case MSR_K7_PERFCTR2: | |
1114 | case MSR_K7_PERFCTR3: | |
1115 | pr_unimpl(vcpu, "unimplemented perfctr wrmsr: " | |
1116 | "0x%x data 0x%llx\n", msr, data); | |
1117 | break; | |
15c4a640 | 1118 | default: |
ffde22ac ES |
1119 | if (msr && (msr == vcpu->kvm->arch.xen_hvm_config.msr)) |
1120 | return xen_hvm_config(vcpu, data); | |
ed85c068 AP |
1121 | if (!ignore_msrs) { |
1122 | pr_unimpl(vcpu, "unhandled wrmsr: 0x%x data %llx\n", | |
1123 | msr, data); | |
1124 | return 1; | |
1125 | } else { | |
1126 | pr_unimpl(vcpu, "ignored wrmsr: 0x%x data %llx\n", | |
1127 | msr, data); | |
1128 | break; | |
1129 | } | |
15c4a640 CO |
1130 | } |
1131 | return 0; | |
1132 | } | |
1133 | EXPORT_SYMBOL_GPL(kvm_set_msr_common); | |
1134 | ||
1135 | ||
1136 | /* | |
1137 | * Reads an msr value (of 'msr_index') into 'pdata'. | |
1138 | * Returns 0 on success, non-0 otherwise. | |
1139 | * Assumes vcpu_load() was already called. | |
1140 | */ | |
1141 | int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata) | |
1142 | { | |
1143 | return kvm_x86_ops->get_msr(vcpu, msr_index, pdata); | |
1144 | } | |
1145 | ||
9ba075a6 AK |
1146 | static int get_msr_mtrr(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
1147 | { | |
0bed3b56 SY |
1148 | u64 *p = (u64 *)&vcpu->arch.mtrr_state.fixed_ranges; |
1149 | ||
9ba075a6 AK |
1150 | if (!msr_mtrr_valid(msr)) |
1151 | return 1; | |
1152 | ||
0bed3b56 SY |
1153 | if (msr == MSR_MTRRdefType) |
1154 | *pdata = vcpu->arch.mtrr_state.def_type + | |
1155 | (vcpu->arch.mtrr_state.enabled << 10); | |
1156 | else if (msr == MSR_MTRRfix64K_00000) | |
1157 | *pdata = p[0]; | |
1158 | else if (msr == MSR_MTRRfix16K_80000 || msr == MSR_MTRRfix16K_A0000) | |
1159 | *pdata = p[1 + msr - MSR_MTRRfix16K_80000]; | |
1160 | else if (msr >= MSR_MTRRfix4K_C0000 && msr <= MSR_MTRRfix4K_F8000) | |
1161 | *pdata = p[3 + msr - MSR_MTRRfix4K_C0000]; | |
1162 | else if (msr == MSR_IA32_CR_PAT) | |
1163 | *pdata = vcpu->arch.pat; | |
1164 | else { /* Variable MTRRs */ | |
1165 | int idx, is_mtrr_mask; | |
1166 | u64 *pt; | |
1167 | ||
1168 | idx = (msr - 0x200) / 2; | |
1169 | is_mtrr_mask = msr - 0x200 - 2 * idx; | |
1170 | if (!is_mtrr_mask) | |
1171 | pt = | |
1172 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].base_lo; | |
1173 | else | |
1174 | pt = | |
1175 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].mask_lo; | |
1176 | *pdata = *pt; | |
1177 | } | |
1178 | ||
9ba075a6 AK |
1179 | return 0; |
1180 | } | |
1181 | ||
890ca9ae | 1182 | static int get_msr_mce(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
15c4a640 CO |
1183 | { |
1184 | u64 data; | |
890ca9ae HY |
1185 | u64 mcg_cap = vcpu->arch.mcg_cap; |
1186 | unsigned bank_num = mcg_cap & 0xff; | |
15c4a640 CO |
1187 | |
1188 | switch (msr) { | |
15c4a640 CO |
1189 | case MSR_IA32_P5_MC_ADDR: |
1190 | case MSR_IA32_P5_MC_TYPE: | |
890ca9ae HY |
1191 | data = 0; |
1192 | break; | |
15c4a640 | 1193 | case MSR_IA32_MCG_CAP: |
890ca9ae HY |
1194 | data = vcpu->arch.mcg_cap; |
1195 | break; | |
c7ac679c | 1196 | case MSR_IA32_MCG_CTL: |
890ca9ae HY |
1197 | if (!(mcg_cap & MCG_CTL_P)) |
1198 | return 1; | |
1199 | data = vcpu->arch.mcg_ctl; | |
1200 | break; | |
1201 | case MSR_IA32_MCG_STATUS: | |
1202 | data = vcpu->arch.mcg_status; | |
1203 | break; | |
1204 | default: | |
1205 | if (msr >= MSR_IA32_MC0_CTL && | |
1206 | msr < MSR_IA32_MC0_CTL + 4 * bank_num) { | |
1207 | u32 offset = msr - MSR_IA32_MC0_CTL; | |
1208 | data = vcpu->arch.mce_banks[offset]; | |
1209 | break; | |
1210 | } | |
1211 | return 1; | |
1212 | } | |
1213 | *pdata = data; | |
1214 | return 0; | |
1215 | } | |
1216 | ||
1217 | int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) | |
1218 | { | |
1219 | u64 data; | |
1220 | ||
1221 | switch (msr) { | |
890ca9ae | 1222 | case MSR_IA32_PLATFORM_ID: |
15c4a640 | 1223 | case MSR_IA32_UCODE_REV: |
15c4a640 | 1224 | case MSR_IA32_EBL_CR_POWERON: |
b5e2fec0 AG |
1225 | case MSR_IA32_DEBUGCTLMSR: |
1226 | case MSR_IA32_LASTBRANCHFROMIP: | |
1227 | case MSR_IA32_LASTBRANCHTOIP: | |
1228 | case MSR_IA32_LASTINTFROMIP: | |
1229 | case MSR_IA32_LASTINTTOIP: | |
60af2ecd JSR |
1230 | case MSR_K8_SYSCFG: |
1231 | case MSR_K7_HWCR: | |
61a6bd67 | 1232 | case MSR_VM_HSAVE_PA: |
1f3ee616 AS |
1233 | case MSR_P6_PERFCTR0: |
1234 | case MSR_P6_PERFCTR1: | |
7fe29e0f AS |
1235 | case MSR_P6_EVNTSEL0: |
1236 | case MSR_P6_EVNTSEL1: | |
9e699624 | 1237 | case MSR_K7_EVNTSEL0: |
1f3ee616 | 1238 | case MSR_K7_PERFCTR0: |
1fdbd48c | 1239 | case MSR_K8_INT_PENDING_MSG: |
c323c0e5 | 1240 | case MSR_AMD64_NB_CFG: |
f7c6d140 | 1241 | case MSR_FAM10H_MMIO_CONF_BASE: |
15c4a640 CO |
1242 | data = 0; |
1243 | break; | |
9ba075a6 AK |
1244 | case MSR_MTRRcap: |
1245 | data = 0x500 | KVM_NR_VAR_MTRR; | |
1246 | break; | |
1247 | case 0x200 ... 0x2ff: | |
1248 | return get_msr_mtrr(vcpu, msr, pdata); | |
15c4a640 CO |
1249 | case 0xcd: /* fsb frequency */ |
1250 | data = 3; | |
1251 | break; | |
1252 | case MSR_IA32_APICBASE: | |
1253 | data = kvm_get_apic_base(vcpu); | |
1254 | break; | |
0105d1a5 GN |
1255 | case APIC_BASE_MSR ... APIC_BASE_MSR + 0x3ff: |
1256 | return kvm_x2apic_msr_read(vcpu, msr, pdata); | |
1257 | break; | |
15c4a640 | 1258 | case MSR_IA32_MISC_ENABLE: |
ad312c7c | 1259 | data = vcpu->arch.ia32_misc_enable_msr; |
15c4a640 | 1260 | break; |
847f0ad8 AG |
1261 | case MSR_IA32_PERF_STATUS: |
1262 | /* TSC increment by tick */ | |
1263 | data = 1000ULL; | |
1264 | /* CPU multiplier */ | |
1265 | data |= (((uint64_t)4ULL) << 40); | |
1266 | break; | |
15c4a640 | 1267 | case MSR_EFER: |
ad312c7c | 1268 | data = vcpu->arch.shadow_efer; |
15c4a640 | 1269 | break; |
18068523 GOC |
1270 | case MSR_KVM_WALL_CLOCK: |
1271 | data = vcpu->kvm->arch.wall_clock; | |
1272 | break; | |
1273 | case MSR_KVM_SYSTEM_TIME: | |
1274 | data = vcpu->arch.time; | |
1275 | break; | |
890ca9ae HY |
1276 | case MSR_IA32_P5_MC_ADDR: |
1277 | case MSR_IA32_P5_MC_TYPE: | |
1278 | case MSR_IA32_MCG_CAP: | |
1279 | case MSR_IA32_MCG_CTL: | |
1280 | case MSR_IA32_MCG_STATUS: | |
1281 | case MSR_IA32_MC0_CTL ... MSR_IA32_MC0_CTL + 4 * KVM_MAX_MCE_BANKS - 1: | |
1282 | return get_msr_mce(vcpu, msr, pdata); | |
15c4a640 | 1283 | default: |
ed85c068 AP |
1284 | if (!ignore_msrs) { |
1285 | pr_unimpl(vcpu, "unhandled rdmsr: 0x%x\n", msr); | |
1286 | return 1; | |
1287 | } else { | |
1288 | pr_unimpl(vcpu, "ignored rdmsr: 0x%x\n", msr); | |
1289 | data = 0; | |
1290 | } | |
1291 | break; | |
15c4a640 CO |
1292 | } |
1293 | *pdata = data; | |
1294 | return 0; | |
1295 | } | |
1296 | EXPORT_SYMBOL_GPL(kvm_get_msr_common); | |
1297 | ||
313a3dc7 CO |
1298 | /* |
1299 | * Read or write a bunch of msrs. All parameters are kernel addresses. | |
1300 | * | |
1301 | * @return number of msrs set successfully. | |
1302 | */ | |
1303 | static int __msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs *msrs, | |
1304 | struct kvm_msr_entry *entries, | |
1305 | int (*do_msr)(struct kvm_vcpu *vcpu, | |
1306 | unsigned index, u64 *data)) | |
1307 | { | |
1308 | int i; | |
1309 | ||
1310 | vcpu_load(vcpu); | |
1311 | ||
3200f405 | 1312 | down_read(&vcpu->kvm->slots_lock); |
313a3dc7 CO |
1313 | for (i = 0; i < msrs->nmsrs; ++i) |
1314 | if (do_msr(vcpu, entries[i].index, &entries[i].data)) | |
1315 | break; | |
3200f405 | 1316 | up_read(&vcpu->kvm->slots_lock); |
313a3dc7 CO |
1317 | |
1318 | vcpu_put(vcpu); | |
1319 | ||
1320 | return i; | |
1321 | } | |
1322 | ||
1323 | /* | |
1324 | * Read or write a bunch of msrs. Parameters are user addresses. | |
1325 | * | |
1326 | * @return number of msrs set successfully. | |
1327 | */ | |
1328 | static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs, | |
1329 | int (*do_msr)(struct kvm_vcpu *vcpu, | |
1330 | unsigned index, u64 *data), | |
1331 | int writeback) | |
1332 | { | |
1333 | struct kvm_msrs msrs; | |
1334 | struct kvm_msr_entry *entries; | |
1335 | int r, n; | |
1336 | unsigned size; | |
1337 | ||
1338 | r = -EFAULT; | |
1339 | if (copy_from_user(&msrs, user_msrs, sizeof msrs)) | |
1340 | goto out; | |
1341 | ||
1342 | r = -E2BIG; | |
1343 | if (msrs.nmsrs >= MAX_IO_MSRS) | |
1344 | goto out; | |
1345 | ||
1346 | r = -ENOMEM; | |
1347 | size = sizeof(struct kvm_msr_entry) * msrs.nmsrs; | |
1348 | entries = vmalloc(size); | |
1349 | if (!entries) | |
1350 | goto out; | |
1351 | ||
1352 | r = -EFAULT; | |
1353 | if (copy_from_user(entries, user_msrs->entries, size)) | |
1354 | goto out_free; | |
1355 | ||
1356 | r = n = __msr_io(vcpu, &msrs, entries, do_msr); | |
1357 | if (r < 0) | |
1358 | goto out_free; | |
1359 | ||
1360 | r = -EFAULT; | |
1361 | if (writeback && copy_to_user(user_msrs->entries, entries, size)) | |
1362 | goto out_free; | |
1363 | ||
1364 | r = n; | |
1365 | ||
1366 | out_free: | |
1367 | vfree(entries); | |
1368 | out: | |
1369 | return r; | |
1370 | } | |
1371 | ||
018d00d2 ZX |
1372 | int kvm_dev_ioctl_check_extension(long ext) |
1373 | { | |
1374 | int r; | |
1375 | ||
1376 | switch (ext) { | |
1377 | case KVM_CAP_IRQCHIP: | |
1378 | case KVM_CAP_HLT: | |
1379 | case KVM_CAP_MMU_SHADOW_CACHE_CONTROL: | |
018d00d2 | 1380 | case KVM_CAP_SET_TSS_ADDR: |
07716717 | 1381 | case KVM_CAP_EXT_CPUID: |
c8076604 | 1382 | case KVM_CAP_CLOCKSOURCE: |
7837699f | 1383 | case KVM_CAP_PIT: |
a28e4f5a | 1384 | case KVM_CAP_NOP_IO_DELAY: |
62d9f0db | 1385 | case KVM_CAP_MP_STATE: |
ed848624 | 1386 | case KVM_CAP_SYNC_MMU: |
52d939a0 | 1387 | case KVM_CAP_REINJECT_CONTROL: |
4925663a | 1388 | case KVM_CAP_IRQ_INJECT_STATUS: |
e56d532f | 1389 | case KVM_CAP_ASSIGN_DEV_IRQ: |
721eecbf | 1390 | case KVM_CAP_IRQFD: |
d34e6b17 | 1391 | case KVM_CAP_IOEVENTFD: |
c5ff41ce | 1392 | case KVM_CAP_PIT2: |
e9f42757 | 1393 | case KVM_CAP_PIT_STATE2: |
b927a3ce | 1394 | case KVM_CAP_SET_IDENTITY_MAP_ADDR: |
ffde22ac | 1395 | case KVM_CAP_XEN_HVM: |
afbcf7ab | 1396 | case KVM_CAP_ADJUST_CLOCK: |
3cfc3092 | 1397 | case KVM_CAP_VCPU_EVENTS: |
018d00d2 ZX |
1398 | r = 1; |
1399 | break; | |
542472b5 LV |
1400 | case KVM_CAP_COALESCED_MMIO: |
1401 | r = KVM_COALESCED_MMIO_PAGE_OFFSET; | |
1402 | break; | |
774ead3a AK |
1403 | case KVM_CAP_VAPIC: |
1404 | r = !kvm_x86_ops->cpu_has_accelerated_tpr(); | |
1405 | break; | |
f725230a AK |
1406 | case KVM_CAP_NR_VCPUS: |
1407 | r = KVM_MAX_VCPUS; | |
1408 | break; | |
a988b910 AK |
1409 | case KVM_CAP_NR_MEMSLOTS: |
1410 | r = KVM_MEMORY_SLOTS; | |
1411 | break; | |
a68a6a72 MT |
1412 | case KVM_CAP_PV_MMU: /* obsolete */ |
1413 | r = 0; | |
2f333bcb | 1414 | break; |
62c476c7 | 1415 | case KVM_CAP_IOMMU: |
19de40a8 | 1416 | r = iommu_found(); |
62c476c7 | 1417 | break; |
890ca9ae HY |
1418 | case KVM_CAP_MCE: |
1419 | r = KVM_MAX_MCE_BANKS; | |
1420 | break; | |
018d00d2 ZX |
1421 | default: |
1422 | r = 0; | |
1423 | break; | |
1424 | } | |
1425 | return r; | |
1426 | ||
1427 | } | |
1428 | ||
043405e1 CO |
1429 | long kvm_arch_dev_ioctl(struct file *filp, |
1430 | unsigned int ioctl, unsigned long arg) | |
1431 | { | |
1432 | void __user *argp = (void __user *)arg; | |
1433 | long r; | |
1434 | ||
1435 | switch (ioctl) { | |
1436 | case KVM_GET_MSR_INDEX_LIST: { | |
1437 | struct kvm_msr_list __user *user_msr_list = argp; | |
1438 | struct kvm_msr_list msr_list; | |
1439 | unsigned n; | |
1440 | ||
1441 | r = -EFAULT; | |
1442 | if (copy_from_user(&msr_list, user_msr_list, sizeof msr_list)) | |
1443 | goto out; | |
1444 | n = msr_list.nmsrs; | |
1445 | msr_list.nmsrs = num_msrs_to_save + ARRAY_SIZE(emulated_msrs); | |
1446 | if (copy_to_user(user_msr_list, &msr_list, sizeof msr_list)) | |
1447 | goto out; | |
1448 | r = -E2BIG; | |
e125e7b6 | 1449 | if (n < msr_list.nmsrs) |
043405e1 CO |
1450 | goto out; |
1451 | r = -EFAULT; | |
1452 | if (copy_to_user(user_msr_list->indices, &msrs_to_save, | |
1453 | num_msrs_to_save * sizeof(u32))) | |
1454 | goto out; | |
e125e7b6 | 1455 | if (copy_to_user(user_msr_list->indices + num_msrs_to_save, |
043405e1 CO |
1456 | &emulated_msrs, |
1457 | ARRAY_SIZE(emulated_msrs) * sizeof(u32))) | |
1458 | goto out; | |
1459 | r = 0; | |
1460 | break; | |
1461 | } | |
674eea0f AK |
1462 | case KVM_GET_SUPPORTED_CPUID: { |
1463 | struct kvm_cpuid2 __user *cpuid_arg = argp; | |
1464 | struct kvm_cpuid2 cpuid; | |
1465 | ||
1466 | r = -EFAULT; | |
1467 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
1468 | goto out; | |
1469 | r = kvm_dev_ioctl_get_supported_cpuid(&cpuid, | |
19355475 | 1470 | cpuid_arg->entries); |
674eea0f AK |
1471 | if (r) |
1472 | goto out; | |
1473 | ||
1474 | r = -EFAULT; | |
1475 | if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid)) | |
1476 | goto out; | |
1477 | r = 0; | |
1478 | break; | |
1479 | } | |
890ca9ae HY |
1480 | case KVM_X86_GET_MCE_CAP_SUPPORTED: { |
1481 | u64 mce_cap; | |
1482 | ||
1483 | mce_cap = KVM_MCE_CAP_SUPPORTED; | |
1484 | r = -EFAULT; | |
1485 | if (copy_to_user(argp, &mce_cap, sizeof mce_cap)) | |
1486 | goto out; | |
1487 | r = 0; | |
1488 | break; | |
1489 | } | |
043405e1 CO |
1490 | default: |
1491 | r = -EINVAL; | |
1492 | } | |
1493 | out: | |
1494 | return r; | |
1495 | } | |
1496 | ||
313a3dc7 CO |
1497 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
1498 | { | |
1499 | kvm_x86_ops->vcpu_load(vcpu, cpu); | |
6b7d7e76 ZA |
1500 | if (unlikely(per_cpu(cpu_tsc_khz, cpu) == 0)) { |
1501 | unsigned long khz = cpufreq_quick_get(cpu); | |
1502 | if (!khz) | |
1503 | khz = tsc_khz; | |
1504 | per_cpu(cpu_tsc_khz, cpu) = khz; | |
1505 | } | |
c8076604 | 1506 | kvm_request_guest_time_update(vcpu); |
313a3dc7 CO |
1507 | } |
1508 | ||
1509 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
1510 | { | |
1511 | kvm_x86_ops->vcpu_put(vcpu); | |
9327fd11 | 1512 | kvm_put_guest_fpu(vcpu); |
313a3dc7 CO |
1513 | } |
1514 | ||
07716717 | 1515 | static int is_efer_nx(void) |
313a3dc7 | 1516 | { |
e286e86e | 1517 | unsigned long long efer = 0; |
313a3dc7 | 1518 | |
e286e86e | 1519 | rdmsrl_safe(MSR_EFER, &efer); |
07716717 DK |
1520 | return efer & EFER_NX; |
1521 | } | |
1522 | ||
1523 | static void cpuid_fix_nx_cap(struct kvm_vcpu *vcpu) | |
1524 | { | |
1525 | int i; | |
1526 | struct kvm_cpuid_entry2 *e, *entry; | |
1527 | ||
313a3dc7 | 1528 | entry = NULL; |
ad312c7c ZX |
1529 | for (i = 0; i < vcpu->arch.cpuid_nent; ++i) { |
1530 | e = &vcpu->arch.cpuid_entries[i]; | |
313a3dc7 CO |
1531 | if (e->function == 0x80000001) { |
1532 | entry = e; | |
1533 | break; | |
1534 | } | |
1535 | } | |
07716717 | 1536 | if (entry && (entry->edx & (1 << 20)) && !is_efer_nx()) { |
313a3dc7 CO |
1537 | entry->edx &= ~(1 << 20); |
1538 | printk(KERN_INFO "kvm: guest NX capability removed\n"); | |
1539 | } | |
1540 | } | |
1541 | ||
07716717 | 1542 | /* when an old userspace process fills a new kernel module */ |
313a3dc7 CO |
1543 | static int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu *vcpu, |
1544 | struct kvm_cpuid *cpuid, | |
1545 | struct kvm_cpuid_entry __user *entries) | |
07716717 DK |
1546 | { |
1547 | int r, i; | |
1548 | struct kvm_cpuid_entry *cpuid_entries; | |
1549 | ||
1550 | r = -E2BIG; | |
1551 | if (cpuid->nent > KVM_MAX_CPUID_ENTRIES) | |
1552 | goto out; | |
1553 | r = -ENOMEM; | |
1554 | cpuid_entries = vmalloc(sizeof(struct kvm_cpuid_entry) * cpuid->nent); | |
1555 | if (!cpuid_entries) | |
1556 | goto out; | |
1557 | r = -EFAULT; | |
1558 | if (copy_from_user(cpuid_entries, entries, | |
1559 | cpuid->nent * sizeof(struct kvm_cpuid_entry))) | |
1560 | goto out_free; | |
1561 | for (i = 0; i < cpuid->nent; i++) { | |
ad312c7c ZX |
1562 | vcpu->arch.cpuid_entries[i].function = cpuid_entries[i].function; |
1563 | vcpu->arch.cpuid_entries[i].eax = cpuid_entries[i].eax; | |
1564 | vcpu->arch.cpuid_entries[i].ebx = cpuid_entries[i].ebx; | |
1565 | vcpu->arch.cpuid_entries[i].ecx = cpuid_entries[i].ecx; | |
1566 | vcpu->arch.cpuid_entries[i].edx = cpuid_entries[i].edx; | |
1567 | vcpu->arch.cpuid_entries[i].index = 0; | |
1568 | vcpu->arch.cpuid_entries[i].flags = 0; | |
1569 | vcpu->arch.cpuid_entries[i].padding[0] = 0; | |
1570 | vcpu->arch.cpuid_entries[i].padding[1] = 0; | |
1571 | vcpu->arch.cpuid_entries[i].padding[2] = 0; | |
1572 | } | |
1573 | vcpu->arch.cpuid_nent = cpuid->nent; | |
07716717 DK |
1574 | cpuid_fix_nx_cap(vcpu); |
1575 | r = 0; | |
fc61b800 | 1576 | kvm_apic_set_version(vcpu); |
0e851880 | 1577 | kvm_x86_ops->cpuid_update(vcpu); |
07716717 DK |
1578 | |
1579 | out_free: | |
1580 | vfree(cpuid_entries); | |
1581 | out: | |
1582 | return r; | |
1583 | } | |
1584 | ||
1585 | static int kvm_vcpu_ioctl_set_cpuid2(struct kvm_vcpu *vcpu, | |
19355475 AS |
1586 | struct kvm_cpuid2 *cpuid, |
1587 | struct kvm_cpuid_entry2 __user *entries) | |
313a3dc7 CO |
1588 | { |
1589 | int r; | |
1590 | ||
1591 | r = -E2BIG; | |
1592 | if (cpuid->nent > KVM_MAX_CPUID_ENTRIES) | |
1593 | goto out; | |
1594 | r = -EFAULT; | |
ad312c7c | 1595 | if (copy_from_user(&vcpu->arch.cpuid_entries, entries, |
07716717 | 1596 | cpuid->nent * sizeof(struct kvm_cpuid_entry2))) |
313a3dc7 | 1597 | goto out; |
ad312c7c | 1598 | vcpu->arch.cpuid_nent = cpuid->nent; |
fc61b800 | 1599 | kvm_apic_set_version(vcpu); |
0e851880 | 1600 | kvm_x86_ops->cpuid_update(vcpu); |
313a3dc7 CO |
1601 | return 0; |
1602 | ||
1603 | out: | |
1604 | return r; | |
1605 | } | |
1606 | ||
07716717 | 1607 | static int kvm_vcpu_ioctl_get_cpuid2(struct kvm_vcpu *vcpu, |
19355475 AS |
1608 | struct kvm_cpuid2 *cpuid, |
1609 | struct kvm_cpuid_entry2 __user *entries) | |
07716717 DK |
1610 | { |
1611 | int r; | |
1612 | ||
1613 | r = -E2BIG; | |
ad312c7c | 1614 | if (cpuid->nent < vcpu->arch.cpuid_nent) |
07716717 DK |
1615 | goto out; |
1616 | r = -EFAULT; | |
ad312c7c | 1617 | if (copy_to_user(entries, &vcpu->arch.cpuid_entries, |
19355475 | 1618 | vcpu->arch.cpuid_nent * sizeof(struct kvm_cpuid_entry2))) |
07716717 DK |
1619 | goto out; |
1620 | return 0; | |
1621 | ||
1622 | out: | |
ad312c7c | 1623 | cpuid->nent = vcpu->arch.cpuid_nent; |
07716717 DK |
1624 | return r; |
1625 | } | |
1626 | ||
07716717 | 1627 | static void do_cpuid_1_ent(struct kvm_cpuid_entry2 *entry, u32 function, |
19355475 | 1628 | u32 index) |
07716717 DK |
1629 | { |
1630 | entry->function = function; | |
1631 | entry->index = index; | |
1632 | cpuid_count(entry->function, entry->index, | |
19355475 | 1633 | &entry->eax, &entry->ebx, &entry->ecx, &entry->edx); |
07716717 DK |
1634 | entry->flags = 0; |
1635 | } | |
1636 | ||
7faa4ee1 AK |
1637 | #define F(x) bit(X86_FEATURE_##x) |
1638 | ||
07716717 DK |
1639 | static void do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function, |
1640 | u32 index, int *nent, int maxnent) | |
1641 | { | |
7faa4ee1 | 1642 | unsigned f_nx = is_efer_nx() ? F(NX) : 0; |
344f414f | 1643 | unsigned f_gbpages = kvm_x86_ops->gb_page_enable() ? F(GBPAGES) : 0; |
07716717 | 1644 | #ifdef CONFIG_X86_64 |
7faa4ee1 AK |
1645 | unsigned f_lm = F(LM); |
1646 | #else | |
1647 | unsigned f_lm = 0; | |
07716717 | 1648 | #endif |
4e47c7a6 | 1649 | unsigned f_rdtscp = kvm_x86_ops->rdtscp_supported() ? F(RDTSCP) : 0; |
7faa4ee1 AK |
1650 | |
1651 | /* cpuid 1.edx */ | |
1652 | const u32 kvm_supported_word0_x86_features = | |
1653 | F(FPU) | F(VME) | F(DE) | F(PSE) | | |
1654 | F(TSC) | F(MSR) | F(PAE) | F(MCE) | | |
1655 | F(CX8) | F(APIC) | 0 /* Reserved */ | F(SEP) | | |
1656 | F(MTRR) | F(PGE) | F(MCA) | F(CMOV) | | |
1657 | F(PAT) | F(PSE36) | 0 /* PSN */ | F(CLFLSH) | | |
1658 | 0 /* Reserved, DS, ACPI */ | F(MMX) | | |
1659 | F(FXSR) | F(XMM) | F(XMM2) | F(SELFSNOOP) | | |
1660 | 0 /* HTT, TM, Reserved, PBE */; | |
1661 | /* cpuid 0x80000001.edx */ | |
1662 | const u32 kvm_supported_word1_x86_features = | |
1663 | F(FPU) | F(VME) | F(DE) | F(PSE) | | |
1664 | F(TSC) | F(MSR) | F(PAE) | F(MCE) | | |
1665 | F(CX8) | F(APIC) | 0 /* Reserved */ | F(SYSCALL) | | |
1666 | F(MTRR) | F(PGE) | F(MCA) | F(CMOV) | | |
1667 | F(PAT) | F(PSE36) | 0 /* Reserved */ | | |
1668 | f_nx | 0 /* Reserved */ | F(MMXEXT) | F(MMX) | | |
4e47c7a6 | 1669 | F(FXSR) | F(FXSR_OPT) | f_gbpages | f_rdtscp | |
7faa4ee1 AK |
1670 | 0 /* Reserved */ | f_lm | F(3DNOWEXT) | F(3DNOW); |
1671 | /* cpuid 1.ecx */ | |
1672 | const u32 kvm_supported_word4_x86_features = | |
d149c731 AK |
1673 | F(XMM3) | 0 /* Reserved, DTES64, MONITOR */ | |
1674 | 0 /* DS-CPL, VMX, SMX, EST */ | | |
1675 | 0 /* TM2 */ | F(SSSE3) | 0 /* CNXT-ID */ | 0 /* Reserved */ | | |
1676 | 0 /* Reserved */ | F(CX16) | 0 /* xTPR Update, PDCM */ | | |
1677 | 0 /* Reserved, DCA */ | F(XMM4_1) | | |
0105d1a5 | 1678 | F(XMM4_2) | F(X2APIC) | F(MOVBE) | F(POPCNT) | |
d149c731 | 1679 | 0 /* Reserved, XSAVE, OSXSAVE */; |
7faa4ee1 | 1680 | /* cpuid 0x80000001.ecx */ |
07716717 | 1681 | const u32 kvm_supported_word6_x86_features = |
7faa4ee1 AK |
1682 | F(LAHF_LM) | F(CMP_LEGACY) | F(SVM) | 0 /* ExtApicSpace */ | |
1683 | F(CR8_LEGACY) | F(ABM) | F(SSE4A) | F(MISALIGNSSE) | | |
1684 | F(3DNOWPREFETCH) | 0 /* OSVW */ | 0 /* IBS */ | F(SSE5) | | |
1685 | 0 /* SKINIT */ | 0 /* WDT */; | |
07716717 | 1686 | |
19355475 | 1687 | /* all calls to cpuid_count() should be made on the same cpu */ |
07716717 DK |
1688 | get_cpu(); |
1689 | do_cpuid_1_ent(entry, function, index); | |
1690 | ++*nent; | |
1691 | ||
1692 | switch (function) { | |
1693 | case 0: | |
1694 | entry->eax = min(entry->eax, (u32)0xb); | |
1695 | break; | |
1696 | case 1: | |
1697 | entry->edx &= kvm_supported_word0_x86_features; | |
7faa4ee1 | 1698 | entry->ecx &= kvm_supported_word4_x86_features; |
0d1de2d9 GN |
1699 | /* we support x2apic emulation even if host does not support |
1700 | * it since we emulate x2apic in software */ | |
1701 | entry->ecx |= F(X2APIC); | |
07716717 DK |
1702 | break; |
1703 | /* function 2 entries are STATEFUL. That is, repeated cpuid commands | |
1704 | * may return different values. This forces us to get_cpu() before | |
1705 | * issuing the first command, and also to emulate this annoying behavior | |
1706 | * in kvm_emulate_cpuid() using KVM_CPUID_FLAG_STATE_READ_NEXT */ | |
1707 | case 2: { | |
1708 | int t, times = entry->eax & 0xff; | |
1709 | ||
1710 | entry->flags |= KVM_CPUID_FLAG_STATEFUL_FUNC; | |
0fdf8e59 | 1711 | entry->flags |= KVM_CPUID_FLAG_STATE_READ_NEXT; |
07716717 DK |
1712 | for (t = 1; t < times && *nent < maxnent; ++t) { |
1713 | do_cpuid_1_ent(&entry[t], function, 0); | |
1714 | entry[t].flags |= KVM_CPUID_FLAG_STATEFUL_FUNC; | |
1715 | ++*nent; | |
1716 | } | |
1717 | break; | |
1718 | } | |
1719 | /* function 4 and 0xb have additional index. */ | |
1720 | case 4: { | |
14af3f3c | 1721 | int i, cache_type; |
07716717 DK |
1722 | |
1723 | entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX; | |
1724 | /* read more entries until cache_type is zero */ | |
14af3f3c HH |
1725 | for (i = 1; *nent < maxnent; ++i) { |
1726 | cache_type = entry[i - 1].eax & 0x1f; | |
07716717 DK |
1727 | if (!cache_type) |
1728 | break; | |
14af3f3c HH |
1729 | do_cpuid_1_ent(&entry[i], function, i); |
1730 | entry[i].flags |= | |
07716717 DK |
1731 | KVM_CPUID_FLAG_SIGNIFCANT_INDEX; |
1732 | ++*nent; | |
1733 | } | |
1734 | break; | |
1735 | } | |
1736 | case 0xb: { | |
14af3f3c | 1737 | int i, level_type; |
07716717 DK |
1738 | |
1739 | entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX; | |
1740 | /* read more entries until level_type is zero */ | |
14af3f3c | 1741 | for (i = 1; *nent < maxnent; ++i) { |
0853d2c1 | 1742 | level_type = entry[i - 1].ecx & 0xff00; |
07716717 DK |
1743 | if (!level_type) |
1744 | break; | |
14af3f3c HH |
1745 | do_cpuid_1_ent(&entry[i], function, i); |
1746 | entry[i].flags |= | |
07716717 DK |
1747 | KVM_CPUID_FLAG_SIGNIFCANT_INDEX; |
1748 | ++*nent; | |
1749 | } | |
1750 | break; | |
1751 | } | |
1752 | case 0x80000000: | |
1753 | entry->eax = min(entry->eax, 0x8000001a); | |
1754 | break; | |
1755 | case 0x80000001: | |
1756 | entry->edx &= kvm_supported_word1_x86_features; | |
1757 | entry->ecx &= kvm_supported_word6_x86_features; | |
1758 | break; | |
1759 | } | |
1760 | put_cpu(); | |
1761 | } | |
1762 | ||
7faa4ee1 AK |
1763 | #undef F |
1764 | ||
674eea0f | 1765 | static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2 *cpuid, |
19355475 | 1766 | struct kvm_cpuid_entry2 __user *entries) |
07716717 DK |
1767 | { |
1768 | struct kvm_cpuid_entry2 *cpuid_entries; | |
1769 | int limit, nent = 0, r = -E2BIG; | |
1770 | u32 func; | |
1771 | ||
1772 | if (cpuid->nent < 1) | |
1773 | goto out; | |
6a544355 AK |
1774 | if (cpuid->nent > KVM_MAX_CPUID_ENTRIES) |
1775 | cpuid->nent = KVM_MAX_CPUID_ENTRIES; | |
07716717 DK |
1776 | r = -ENOMEM; |
1777 | cpuid_entries = vmalloc(sizeof(struct kvm_cpuid_entry2) * cpuid->nent); | |
1778 | if (!cpuid_entries) | |
1779 | goto out; | |
1780 | ||
1781 | do_cpuid_ent(&cpuid_entries[0], 0, 0, &nent, cpuid->nent); | |
1782 | limit = cpuid_entries[0].eax; | |
1783 | for (func = 1; func <= limit && nent < cpuid->nent; ++func) | |
1784 | do_cpuid_ent(&cpuid_entries[nent], func, 0, | |
19355475 | 1785 | &nent, cpuid->nent); |
07716717 DK |
1786 | r = -E2BIG; |
1787 | if (nent >= cpuid->nent) | |
1788 | goto out_free; | |
1789 | ||
1790 | do_cpuid_ent(&cpuid_entries[nent], 0x80000000, 0, &nent, cpuid->nent); | |
1791 | limit = cpuid_entries[nent - 1].eax; | |
1792 | for (func = 0x80000001; func <= limit && nent < cpuid->nent; ++func) | |
1793 | do_cpuid_ent(&cpuid_entries[nent], func, 0, | |
19355475 | 1794 | &nent, cpuid->nent); |
cb007648 MM |
1795 | r = -E2BIG; |
1796 | if (nent >= cpuid->nent) | |
1797 | goto out_free; | |
1798 | ||
07716717 DK |
1799 | r = -EFAULT; |
1800 | if (copy_to_user(entries, cpuid_entries, | |
19355475 | 1801 | nent * sizeof(struct kvm_cpuid_entry2))) |
07716717 DK |
1802 | goto out_free; |
1803 | cpuid->nent = nent; | |
1804 | r = 0; | |
1805 | ||
1806 | out_free: | |
1807 | vfree(cpuid_entries); | |
1808 | out: | |
1809 | return r; | |
1810 | } | |
1811 | ||
313a3dc7 CO |
1812 | static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu *vcpu, |
1813 | struct kvm_lapic_state *s) | |
1814 | { | |
1815 | vcpu_load(vcpu); | |
ad312c7c | 1816 | memcpy(s->regs, vcpu->arch.apic->regs, sizeof *s); |
313a3dc7 CO |
1817 | vcpu_put(vcpu); |
1818 | ||
1819 | return 0; | |
1820 | } | |
1821 | ||
1822 | static int kvm_vcpu_ioctl_set_lapic(struct kvm_vcpu *vcpu, | |
1823 | struct kvm_lapic_state *s) | |
1824 | { | |
1825 | vcpu_load(vcpu); | |
ad312c7c | 1826 | memcpy(vcpu->arch.apic->regs, s->regs, sizeof *s); |
313a3dc7 | 1827 | kvm_apic_post_state_restore(vcpu); |
cb142eb7 | 1828 | update_cr8_intercept(vcpu); |
313a3dc7 CO |
1829 | vcpu_put(vcpu); |
1830 | ||
1831 | return 0; | |
1832 | } | |
1833 | ||
f77bc6a4 ZX |
1834 | static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, |
1835 | struct kvm_interrupt *irq) | |
1836 | { | |
1837 | if (irq->irq < 0 || irq->irq >= 256) | |
1838 | return -EINVAL; | |
1839 | if (irqchip_in_kernel(vcpu->kvm)) | |
1840 | return -ENXIO; | |
1841 | vcpu_load(vcpu); | |
1842 | ||
66fd3f7f | 1843 | kvm_queue_interrupt(vcpu, irq->irq, false); |
f77bc6a4 ZX |
1844 | |
1845 | vcpu_put(vcpu); | |
1846 | ||
1847 | return 0; | |
1848 | } | |
1849 | ||
c4abb7c9 JK |
1850 | static int kvm_vcpu_ioctl_nmi(struct kvm_vcpu *vcpu) |
1851 | { | |
1852 | vcpu_load(vcpu); | |
1853 | kvm_inject_nmi(vcpu); | |
1854 | vcpu_put(vcpu); | |
1855 | ||
1856 | return 0; | |
1857 | } | |
1858 | ||
b209749f AK |
1859 | static int vcpu_ioctl_tpr_access_reporting(struct kvm_vcpu *vcpu, |
1860 | struct kvm_tpr_access_ctl *tac) | |
1861 | { | |
1862 | if (tac->flags) | |
1863 | return -EINVAL; | |
1864 | vcpu->arch.tpr_access_reporting = !!tac->enabled; | |
1865 | return 0; | |
1866 | } | |
1867 | ||
890ca9ae HY |
1868 | static int kvm_vcpu_ioctl_x86_setup_mce(struct kvm_vcpu *vcpu, |
1869 | u64 mcg_cap) | |
1870 | { | |
1871 | int r; | |
1872 | unsigned bank_num = mcg_cap & 0xff, bank; | |
1873 | ||
1874 | r = -EINVAL; | |
a9e38c3e | 1875 | if (!bank_num || bank_num >= KVM_MAX_MCE_BANKS) |
890ca9ae HY |
1876 | goto out; |
1877 | if (mcg_cap & ~(KVM_MCE_CAP_SUPPORTED | 0xff | 0xff0000)) | |
1878 | goto out; | |
1879 | r = 0; | |
1880 | vcpu->arch.mcg_cap = mcg_cap; | |
1881 | /* Init IA32_MCG_CTL to all 1s */ | |
1882 | if (mcg_cap & MCG_CTL_P) | |
1883 | vcpu->arch.mcg_ctl = ~(u64)0; | |
1884 | /* Init IA32_MCi_CTL to all 1s */ | |
1885 | for (bank = 0; bank < bank_num; bank++) | |
1886 | vcpu->arch.mce_banks[bank*4] = ~(u64)0; | |
1887 | out: | |
1888 | return r; | |
1889 | } | |
1890 | ||
1891 | static int kvm_vcpu_ioctl_x86_set_mce(struct kvm_vcpu *vcpu, | |
1892 | struct kvm_x86_mce *mce) | |
1893 | { | |
1894 | u64 mcg_cap = vcpu->arch.mcg_cap; | |
1895 | unsigned bank_num = mcg_cap & 0xff; | |
1896 | u64 *banks = vcpu->arch.mce_banks; | |
1897 | ||
1898 | if (mce->bank >= bank_num || !(mce->status & MCI_STATUS_VAL)) | |
1899 | return -EINVAL; | |
1900 | /* | |
1901 | * if IA32_MCG_CTL is not all 1s, the uncorrected error | |
1902 | * reporting is disabled | |
1903 | */ | |
1904 | if ((mce->status & MCI_STATUS_UC) && (mcg_cap & MCG_CTL_P) && | |
1905 | vcpu->arch.mcg_ctl != ~(u64)0) | |
1906 | return 0; | |
1907 | banks += 4 * mce->bank; | |
1908 | /* | |
1909 | * if IA32_MCi_CTL is not all 1s, the uncorrected error | |
1910 | * reporting is disabled for the bank | |
1911 | */ | |
1912 | if ((mce->status & MCI_STATUS_UC) && banks[0] != ~(u64)0) | |
1913 | return 0; | |
1914 | if (mce->status & MCI_STATUS_UC) { | |
1915 | if ((vcpu->arch.mcg_status & MCG_STATUS_MCIP) || | |
fc78f519 | 1916 | !kvm_read_cr4_bits(vcpu, X86_CR4_MCE)) { |
890ca9ae HY |
1917 | printk(KERN_DEBUG "kvm: set_mce: " |
1918 | "injects mce exception while " | |
1919 | "previous one is in progress!\n"); | |
1920 | set_bit(KVM_REQ_TRIPLE_FAULT, &vcpu->requests); | |
1921 | return 0; | |
1922 | } | |
1923 | if (banks[1] & MCI_STATUS_VAL) | |
1924 | mce->status |= MCI_STATUS_OVER; | |
1925 | banks[2] = mce->addr; | |
1926 | banks[3] = mce->misc; | |
1927 | vcpu->arch.mcg_status = mce->mcg_status; | |
1928 | banks[1] = mce->status; | |
1929 | kvm_queue_exception(vcpu, MC_VECTOR); | |
1930 | } else if (!(banks[1] & MCI_STATUS_VAL) | |
1931 | || !(banks[1] & MCI_STATUS_UC)) { | |
1932 | if (banks[1] & MCI_STATUS_VAL) | |
1933 | mce->status |= MCI_STATUS_OVER; | |
1934 | banks[2] = mce->addr; | |
1935 | banks[3] = mce->misc; | |
1936 | banks[1] = mce->status; | |
1937 | } else | |
1938 | banks[1] |= MCI_STATUS_OVER; | |
1939 | return 0; | |
1940 | } | |
1941 | ||
3cfc3092 JK |
1942 | static void kvm_vcpu_ioctl_x86_get_vcpu_events(struct kvm_vcpu *vcpu, |
1943 | struct kvm_vcpu_events *events) | |
1944 | { | |
1945 | vcpu_load(vcpu); | |
1946 | ||
1947 | events->exception.injected = vcpu->arch.exception.pending; | |
1948 | events->exception.nr = vcpu->arch.exception.nr; | |
1949 | events->exception.has_error_code = vcpu->arch.exception.has_error_code; | |
1950 | events->exception.error_code = vcpu->arch.exception.error_code; | |
1951 | ||
1952 | events->interrupt.injected = vcpu->arch.interrupt.pending; | |
1953 | events->interrupt.nr = vcpu->arch.interrupt.nr; | |
1954 | events->interrupt.soft = vcpu->arch.interrupt.soft; | |
1955 | ||
1956 | events->nmi.injected = vcpu->arch.nmi_injected; | |
1957 | events->nmi.pending = vcpu->arch.nmi_pending; | |
1958 | events->nmi.masked = kvm_x86_ops->get_nmi_mask(vcpu); | |
1959 | ||
1960 | events->sipi_vector = vcpu->arch.sipi_vector; | |
1961 | ||
dab4b911 JK |
1962 | events->flags = (KVM_VCPUEVENT_VALID_NMI_PENDING |
1963 | | KVM_VCPUEVENT_VALID_SIPI_VECTOR); | |
3cfc3092 JK |
1964 | |
1965 | vcpu_put(vcpu); | |
1966 | } | |
1967 | ||
1968 | static int kvm_vcpu_ioctl_x86_set_vcpu_events(struct kvm_vcpu *vcpu, | |
1969 | struct kvm_vcpu_events *events) | |
1970 | { | |
dab4b911 JK |
1971 | if (events->flags & ~(KVM_VCPUEVENT_VALID_NMI_PENDING |
1972 | | KVM_VCPUEVENT_VALID_SIPI_VECTOR)) | |
3cfc3092 JK |
1973 | return -EINVAL; |
1974 | ||
1975 | vcpu_load(vcpu); | |
1976 | ||
1977 | vcpu->arch.exception.pending = events->exception.injected; | |
1978 | vcpu->arch.exception.nr = events->exception.nr; | |
1979 | vcpu->arch.exception.has_error_code = events->exception.has_error_code; | |
1980 | vcpu->arch.exception.error_code = events->exception.error_code; | |
1981 | ||
1982 | vcpu->arch.interrupt.pending = events->interrupt.injected; | |
1983 | vcpu->arch.interrupt.nr = events->interrupt.nr; | |
1984 | vcpu->arch.interrupt.soft = events->interrupt.soft; | |
1985 | if (vcpu->arch.interrupt.pending && irqchip_in_kernel(vcpu->kvm)) | |
1986 | kvm_pic_clear_isr_ack(vcpu->kvm); | |
1987 | ||
1988 | vcpu->arch.nmi_injected = events->nmi.injected; | |
dab4b911 JK |
1989 | if (events->flags & KVM_VCPUEVENT_VALID_NMI_PENDING) |
1990 | vcpu->arch.nmi_pending = events->nmi.pending; | |
3cfc3092 JK |
1991 | kvm_x86_ops->set_nmi_mask(vcpu, events->nmi.masked); |
1992 | ||
dab4b911 JK |
1993 | if (events->flags & KVM_VCPUEVENT_VALID_SIPI_VECTOR) |
1994 | vcpu->arch.sipi_vector = events->sipi_vector; | |
3cfc3092 JK |
1995 | |
1996 | vcpu_put(vcpu); | |
1997 | ||
1998 | return 0; | |
1999 | } | |
2000 | ||
313a3dc7 CO |
2001 | long kvm_arch_vcpu_ioctl(struct file *filp, |
2002 | unsigned int ioctl, unsigned long arg) | |
2003 | { | |
2004 | struct kvm_vcpu *vcpu = filp->private_data; | |
2005 | void __user *argp = (void __user *)arg; | |
2006 | int r; | |
b772ff36 | 2007 | struct kvm_lapic_state *lapic = NULL; |
313a3dc7 CO |
2008 | |
2009 | switch (ioctl) { | |
2010 | case KVM_GET_LAPIC: { | |
2204ae3c MT |
2011 | r = -EINVAL; |
2012 | if (!vcpu->arch.apic) | |
2013 | goto out; | |
b772ff36 | 2014 | lapic = kzalloc(sizeof(struct kvm_lapic_state), GFP_KERNEL); |
313a3dc7 | 2015 | |
b772ff36 DH |
2016 | r = -ENOMEM; |
2017 | if (!lapic) | |
2018 | goto out; | |
2019 | r = kvm_vcpu_ioctl_get_lapic(vcpu, lapic); | |
313a3dc7 CO |
2020 | if (r) |
2021 | goto out; | |
2022 | r = -EFAULT; | |
b772ff36 | 2023 | if (copy_to_user(argp, lapic, sizeof(struct kvm_lapic_state))) |
313a3dc7 CO |
2024 | goto out; |
2025 | r = 0; | |
2026 | break; | |
2027 | } | |
2028 | case KVM_SET_LAPIC: { | |
2204ae3c MT |
2029 | r = -EINVAL; |
2030 | if (!vcpu->arch.apic) | |
2031 | goto out; | |
b772ff36 DH |
2032 | lapic = kmalloc(sizeof(struct kvm_lapic_state), GFP_KERNEL); |
2033 | r = -ENOMEM; | |
2034 | if (!lapic) | |
2035 | goto out; | |
313a3dc7 | 2036 | r = -EFAULT; |
b772ff36 | 2037 | if (copy_from_user(lapic, argp, sizeof(struct kvm_lapic_state))) |
313a3dc7 | 2038 | goto out; |
b772ff36 | 2039 | r = kvm_vcpu_ioctl_set_lapic(vcpu, lapic); |
313a3dc7 CO |
2040 | if (r) |
2041 | goto out; | |
2042 | r = 0; | |
2043 | break; | |
2044 | } | |
f77bc6a4 ZX |
2045 | case KVM_INTERRUPT: { |
2046 | struct kvm_interrupt irq; | |
2047 | ||
2048 | r = -EFAULT; | |
2049 | if (copy_from_user(&irq, argp, sizeof irq)) | |
2050 | goto out; | |
2051 | r = kvm_vcpu_ioctl_interrupt(vcpu, &irq); | |
2052 | if (r) | |
2053 | goto out; | |
2054 | r = 0; | |
2055 | break; | |
2056 | } | |
c4abb7c9 JK |
2057 | case KVM_NMI: { |
2058 | r = kvm_vcpu_ioctl_nmi(vcpu); | |
2059 | if (r) | |
2060 | goto out; | |
2061 | r = 0; | |
2062 | break; | |
2063 | } | |
313a3dc7 CO |
2064 | case KVM_SET_CPUID: { |
2065 | struct kvm_cpuid __user *cpuid_arg = argp; | |
2066 | struct kvm_cpuid cpuid; | |
2067 | ||
2068 | r = -EFAULT; | |
2069 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
2070 | goto out; | |
2071 | r = kvm_vcpu_ioctl_set_cpuid(vcpu, &cpuid, cpuid_arg->entries); | |
2072 | if (r) | |
2073 | goto out; | |
2074 | break; | |
2075 | } | |
07716717 DK |
2076 | case KVM_SET_CPUID2: { |
2077 | struct kvm_cpuid2 __user *cpuid_arg = argp; | |
2078 | struct kvm_cpuid2 cpuid; | |
2079 | ||
2080 | r = -EFAULT; | |
2081 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
2082 | goto out; | |
2083 | r = kvm_vcpu_ioctl_set_cpuid2(vcpu, &cpuid, | |
19355475 | 2084 | cpuid_arg->entries); |
07716717 DK |
2085 | if (r) |
2086 | goto out; | |
2087 | break; | |
2088 | } | |
2089 | case KVM_GET_CPUID2: { | |
2090 | struct kvm_cpuid2 __user *cpuid_arg = argp; | |
2091 | struct kvm_cpuid2 cpuid; | |
2092 | ||
2093 | r = -EFAULT; | |
2094 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
2095 | goto out; | |
2096 | r = kvm_vcpu_ioctl_get_cpuid2(vcpu, &cpuid, | |
19355475 | 2097 | cpuid_arg->entries); |
07716717 DK |
2098 | if (r) |
2099 | goto out; | |
2100 | r = -EFAULT; | |
2101 | if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid)) | |
2102 | goto out; | |
2103 | r = 0; | |
2104 | break; | |
2105 | } | |
313a3dc7 CO |
2106 | case KVM_GET_MSRS: |
2107 | r = msr_io(vcpu, argp, kvm_get_msr, 1); | |
2108 | break; | |
2109 | case KVM_SET_MSRS: | |
2110 | r = msr_io(vcpu, argp, do_set_msr, 0); | |
2111 | break; | |
b209749f AK |
2112 | case KVM_TPR_ACCESS_REPORTING: { |
2113 | struct kvm_tpr_access_ctl tac; | |
2114 | ||
2115 | r = -EFAULT; | |
2116 | if (copy_from_user(&tac, argp, sizeof tac)) | |
2117 | goto out; | |
2118 | r = vcpu_ioctl_tpr_access_reporting(vcpu, &tac); | |
2119 | if (r) | |
2120 | goto out; | |
2121 | r = -EFAULT; | |
2122 | if (copy_to_user(argp, &tac, sizeof tac)) | |
2123 | goto out; | |
2124 | r = 0; | |
2125 | break; | |
2126 | }; | |
b93463aa AK |
2127 | case KVM_SET_VAPIC_ADDR: { |
2128 | struct kvm_vapic_addr va; | |
2129 | ||
2130 | r = -EINVAL; | |
2131 | if (!irqchip_in_kernel(vcpu->kvm)) | |
2132 | goto out; | |
2133 | r = -EFAULT; | |
2134 | if (copy_from_user(&va, argp, sizeof va)) | |
2135 | goto out; | |
2136 | r = 0; | |
2137 | kvm_lapic_set_vapic_addr(vcpu, va.vapic_addr); | |
2138 | break; | |
2139 | } | |
890ca9ae HY |
2140 | case KVM_X86_SETUP_MCE: { |
2141 | u64 mcg_cap; | |
2142 | ||
2143 | r = -EFAULT; | |
2144 | if (copy_from_user(&mcg_cap, argp, sizeof mcg_cap)) | |
2145 | goto out; | |
2146 | r = kvm_vcpu_ioctl_x86_setup_mce(vcpu, mcg_cap); | |
2147 | break; | |
2148 | } | |
2149 | case KVM_X86_SET_MCE: { | |
2150 | struct kvm_x86_mce mce; | |
2151 | ||
2152 | r = -EFAULT; | |
2153 | if (copy_from_user(&mce, argp, sizeof mce)) | |
2154 | goto out; | |
2155 | r = kvm_vcpu_ioctl_x86_set_mce(vcpu, &mce); | |
2156 | break; | |
2157 | } | |
3cfc3092 JK |
2158 | case KVM_GET_VCPU_EVENTS: { |
2159 | struct kvm_vcpu_events events; | |
2160 | ||
2161 | kvm_vcpu_ioctl_x86_get_vcpu_events(vcpu, &events); | |
2162 | ||
2163 | r = -EFAULT; | |
2164 | if (copy_to_user(argp, &events, sizeof(struct kvm_vcpu_events))) | |
2165 | break; | |
2166 | r = 0; | |
2167 | break; | |
2168 | } | |
2169 | case KVM_SET_VCPU_EVENTS: { | |
2170 | struct kvm_vcpu_events events; | |
2171 | ||
2172 | r = -EFAULT; | |
2173 | if (copy_from_user(&events, argp, sizeof(struct kvm_vcpu_events))) | |
2174 | break; | |
2175 | ||
2176 | r = kvm_vcpu_ioctl_x86_set_vcpu_events(vcpu, &events); | |
2177 | break; | |
2178 | } | |
313a3dc7 CO |
2179 | default: |
2180 | r = -EINVAL; | |
2181 | } | |
2182 | out: | |
7a6ce84c | 2183 | kfree(lapic); |
313a3dc7 CO |
2184 | return r; |
2185 | } | |
2186 | ||
1fe779f8 CO |
2187 | static int kvm_vm_ioctl_set_tss_addr(struct kvm *kvm, unsigned long addr) |
2188 | { | |
2189 | int ret; | |
2190 | ||
2191 | if (addr > (unsigned int)(-3 * PAGE_SIZE)) | |
2192 | return -1; | |
2193 | ret = kvm_x86_ops->set_tss_addr(kvm, addr); | |
2194 | return ret; | |
2195 | } | |
2196 | ||
b927a3ce SY |
2197 | static int kvm_vm_ioctl_set_identity_map_addr(struct kvm *kvm, |
2198 | u64 ident_addr) | |
2199 | { | |
2200 | kvm->arch.ept_identity_map_addr = ident_addr; | |
2201 | return 0; | |
2202 | } | |
2203 | ||
1fe779f8 CO |
2204 | static int kvm_vm_ioctl_set_nr_mmu_pages(struct kvm *kvm, |
2205 | u32 kvm_nr_mmu_pages) | |
2206 | { | |
2207 | if (kvm_nr_mmu_pages < KVM_MIN_ALLOC_MMU_PAGES) | |
2208 | return -EINVAL; | |
2209 | ||
72dc67a6 | 2210 | down_write(&kvm->slots_lock); |
7c8a83b7 | 2211 | spin_lock(&kvm->mmu_lock); |
1fe779f8 CO |
2212 | |
2213 | kvm_mmu_change_mmu_pages(kvm, kvm_nr_mmu_pages); | |
f05e70ac | 2214 | kvm->arch.n_requested_mmu_pages = kvm_nr_mmu_pages; |
1fe779f8 | 2215 | |
7c8a83b7 | 2216 | spin_unlock(&kvm->mmu_lock); |
72dc67a6 | 2217 | up_write(&kvm->slots_lock); |
1fe779f8 CO |
2218 | return 0; |
2219 | } | |
2220 | ||
2221 | static int kvm_vm_ioctl_get_nr_mmu_pages(struct kvm *kvm) | |
2222 | { | |
f05e70ac | 2223 | return kvm->arch.n_alloc_mmu_pages; |
1fe779f8 CO |
2224 | } |
2225 | ||
e9f85cde ZX |
2226 | gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn) |
2227 | { | |
2228 | int i; | |
2229 | struct kvm_mem_alias *alias; | |
fef9cce0 | 2230 | struct kvm_mem_aliases *aliases = kvm->arch.aliases; |
e9f85cde | 2231 | |
fef9cce0 MT |
2232 | for (i = 0; i < aliases->naliases; ++i) { |
2233 | alias = &aliases->aliases[i]; | |
e9f85cde ZX |
2234 | if (gfn >= alias->base_gfn |
2235 | && gfn < alias->base_gfn + alias->npages) | |
2236 | return alias->target_gfn + gfn - alias->base_gfn; | |
2237 | } | |
2238 | return gfn; | |
2239 | } | |
2240 | ||
1fe779f8 CO |
2241 | /* |
2242 | * Set a new alias region. Aliases map a portion of physical memory into | |
2243 | * another portion. This is useful for memory windows, for example the PC | |
2244 | * VGA region. | |
2245 | */ | |
2246 | static int kvm_vm_ioctl_set_memory_alias(struct kvm *kvm, | |
2247 | struct kvm_memory_alias *alias) | |
2248 | { | |
2249 | int r, n; | |
2250 | struct kvm_mem_alias *p; | |
fef9cce0 | 2251 | struct kvm_mem_aliases *aliases; |
1fe779f8 CO |
2252 | |
2253 | r = -EINVAL; | |
2254 | /* General sanity checks */ | |
2255 | if (alias->memory_size & (PAGE_SIZE - 1)) | |
2256 | goto out; | |
2257 | if (alias->guest_phys_addr & (PAGE_SIZE - 1)) | |
2258 | goto out; | |
2259 | if (alias->slot >= KVM_ALIAS_SLOTS) | |
2260 | goto out; | |
2261 | if (alias->guest_phys_addr + alias->memory_size | |
2262 | < alias->guest_phys_addr) | |
2263 | goto out; | |
2264 | if (alias->target_phys_addr + alias->memory_size | |
2265 | < alias->target_phys_addr) | |
2266 | goto out; | |
2267 | ||
72dc67a6 | 2268 | down_write(&kvm->slots_lock); |
a1708ce8 | 2269 | spin_lock(&kvm->mmu_lock); |
1fe779f8 | 2270 | |
fef9cce0 MT |
2271 | aliases = kvm->arch.aliases; |
2272 | ||
2273 | p = &aliases->aliases[alias->slot]; | |
1fe779f8 CO |
2274 | p->base_gfn = alias->guest_phys_addr >> PAGE_SHIFT; |
2275 | p->npages = alias->memory_size >> PAGE_SHIFT; | |
2276 | p->target_gfn = alias->target_phys_addr >> PAGE_SHIFT; | |
2277 | ||
2278 | for (n = KVM_ALIAS_SLOTS; n > 0; --n) | |
fef9cce0 | 2279 | if (aliases->aliases[n - 1].npages) |
1fe779f8 | 2280 | break; |
fef9cce0 | 2281 | aliases->naliases = n; |
1fe779f8 | 2282 | |
a1708ce8 | 2283 | spin_unlock(&kvm->mmu_lock); |
1fe779f8 CO |
2284 | kvm_mmu_zap_all(kvm); |
2285 | ||
72dc67a6 | 2286 | up_write(&kvm->slots_lock); |
1fe779f8 CO |
2287 | |
2288 | return 0; | |
2289 | ||
2290 | out: | |
2291 | return r; | |
2292 | } | |
2293 | ||
2294 | static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) | |
2295 | { | |
2296 | int r; | |
2297 | ||
2298 | r = 0; | |
2299 | switch (chip->chip_id) { | |
2300 | case KVM_IRQCHIP_PIC_MASTER: | |
2301 | memcpy(&chip->chip.pic, | |
2302 | &pic_irqchip(kvm)->pics[0], | |
2303 | sizeof(struct kvm_pic_state)); | |
2304 | break; | |
2305 | case KVM_IRQCHIP_PIC_SLAVE: | |
2306 | memcpy(&chip->chip.pic, | |
2307 | &pic_irqchip(kvm)->pics[1], | |
2308 | sizeof(struct kvm_pic_state)); | |
2309 | break; | |
2310 | case KVM_IRQCHIP_IOAPIC: | |
eba0226b | 2311 | r = kvm_get_ioapic(kvm, &chip->chip.ioapic); |
1fe779f8 CO |
2312 | break; |
2313 | default: | |
2314 | r = -EINVAL; | |
2315 | break; | |
2316 | } | |
2317 | return r; | |
2318 | } | |
2319 | ||
2320 | static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) | |
2321 | { | |
2322 | int r; | |
2323 | ||
2324 | r = 0; | |
2325 | switch (chip->chip_id) { | |
2326 | case KVM_IRQCHIP_PIC_MASTER: | |
894a9c55 | 2327 | spin_lock(&pic_irqchip(kvm)->lock); |
1fe779f8 CO |
2328 | memcpy(&pic_irqchip(kvm)->pics[0], |
2329 | &chip->chip.pic, | |
2330 | sizeof(struct kvm_pic_state)); | |
894a9c55 | 2331 | spin_unlock(&pic_irqchip(kvm)->lock); |
1fe779f8 CO |
2332 | break; |
2333 | case KVM_IRQCHIP_PIC_SLAVE: | |
894a9c55 | 2334 | spin_lock(&pic_irqchip(kvm)->lock); |
1fe779f8 CO |
2335 | memcpy(&pic_irqchip(kvm)->pics[1], |
2336 | &chip->chip.pic, | |
2337 | sizeof(struct kvm_pic_state)); | |
894a9c55 | 2338 | spin_unlock(&pic_irqchip(kvm)->lock); |
1fe779f8 CO |
2339 | break; |
2340 | case KVM_IRQCHIP_IOAPIC: | |
eba0226b | 2341 | r = kvm_set_ioapic(kvm, &chip->chip.ioapic); |
1fe779f8 CO |
2342 | break; |
2343 | default: | |
2344 | r = -EINVAL; | |
2345 | break; | |
2346 | } | |
2347 | kvm_pic_update_irq(pic_irqchip(kvm)); | |
2348 | return r; | |
2349 | } | |
2350 | ||
e0f63cb9 SY |
2351 | static int kvm_vm_ioctl_get_pit(struct kvm *kvm, struct kvm_pit_state *ps) |
2352 | { | |
2353 | int r = 0; | |
2354 | ||
894a9c55 | 2355 | mutex_lock(&kvm->arch.vpit->pit_state.lock); |
e0f63cb9 | 2356 | memcpy(ps, &kvm->arch.vpit->pit_state, sizeof(struct kvm_pit_state)); |
894a9c55 | 2357 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); |
e0f63cb9 SY |
2358 | return r; |
2359 | } | |
2360 | ||
2361 | static int kvm_vm_ioctl_set_pit(struct kvm *kvm, struct kvm_pit_state *ps) | |
2362 | { | |
2363 | int r = 0; | |
2364 | ||
894a9c55 | 2365 | mutex_lock(&kvm->arch.vpit->pit_state.lock); |
e0f63cb9 | 2366 | memcpy(&kvm->arch.vpit->pit_state, ps, sizeof(struct kvm_pit_state)); |
e9f42757 BK |
2367 | kvm_pit_load_count(kvm, 0, ps->channels[0].count, 0); |
2368 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); | |
2369 | return r; | |
2370 | } | |
2371 | ||
2372 | static int kvm_vm_ioctl_get_pit2(struct kvm *kvm, struct kvm_pit_state2 *ps) | |
2373 | { | |
2374 | int r = 0; | |
2375 | ||
2376 | mutex_lock(&kvm->arch.vpit->pit_state.lock); | |
2377 | memcpy(ps->channels, &kvm->arch.vpit->pit_state.channels, | |
2378 | sizeof(ps->channels)); | |
2379 | ps->flags = kvm->arch.vpit->pit_state.flags; | |
2380 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); | |
2381 | return r; | |
2382 | } | |
2383 | ||
2384 | static int kvm_vm_ioctl_set_pit2(struct kvm *kvm, struct kvm_pit_state2 *ps) | |
2385 | { | |
2386 | int r = 0, start = 0; | |
2387 | u32 prev_legacy, cur_legacy; | |
2388 | mutex_lock(&kvm->arch.vpit->pit_state.lock); | |
2389 | prev_legacy = kvm->arch.vpit->pit_state.flags & KVM_PIT_FLAGS_HPET_LEGACY; | |
2390 | cur_legacy = ps->flags & KVM_PIT_FLAGS_HPET_LEGACY; | |
2391 | if (!prev_legacy && cur_legacy) | |
2392 | start = 1; | |
2393 | memcpy(&kvm->arch.vpit->pit_state.channels, &ps->channels, | |
2394 | sizeof(kvm->arch.vpit->pit_state.channels)); | |
2395 | kvm->arch.vpit->pit_state.flags = ps->flags; | |
2396 | kvm_pit_load_count(kvm, 0, kvm->arch.vpit->pit_state.channels[0].count, start); | |
894a9c55 | 2397 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); |
e0f63cb9 SY |
2398 | return r; |
2399 | } | |
2400 | ||
52d939a0 MT |
2401 | static int kvm_vm_ioctl_reinject(struct kvm *kvm, |
2402 | struct kvm_reinject_control *control) | |
2403 | { | |
2404 | if (!kvm->arch.vpit) | |
2405 | return -ENXIO; | |
894a9c55 | 2406 | mutex_lock(&kvm->arch.vpit->pit_state.lock); |
52d939a0 | 2407 | kvm->arch.vpit->pit_state.pit_timer.reinject = control->pit_reinject; |
894a9c55 | 2408 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); |
52d939a0 MT |
2409 | return 0; |
2410 | } | |
2411 | ||
5bb064dc ZX |
2412 | /* |
2413 | * Get (and clear) the dirty memory log for a memory slot. | |
2414 | */ | |
2415 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, | |
2416 | struct kvm_dirty_log *log) | |
2417 | { | |
2418 | int r; | |
2419 | int n; | |
2420 | struct kvm_memory_slot *memslot; | |
2421 | int is_dirty = 0; | |
2422 | ||
72dc67a6 | 2423 | down_write(&kvm->slots_lock); |
5bb064dc ZX |
2424 | |
2425 | r = kvm_get_dirty_log(kvm, log, &is_dirty); | |
2426 | if (r) | |
2427 | goto out; | |
2428 | ||
2429 | /* If nothing is dirty, don't bother messing with page tables. */ | |
2430 | if (is_dirty) { | |
7c8a83b7 | 2431 | spin_lock(&kvm->mmu_lock); |
5bb064dc | 2432 | kvm_mmu_slot_remove_write_access(kvm, log->slot); |
7c8a83b7 | 2433 | spin_unlock(&kvm->mmu_lock); |
46a26bf5 | 2434 | memslot = &kvm->memslots->memslots[log->slot]; |
5bb064dc ZX |
2435 | n = ALIGN(memslot->npages, BITS_PER_LONG) / 8; |
2436 | memset(memslot->dirty_bitmap, 0, n); | |
2437 | } | |
2438 | r = 0; | |
2439 | out: | |
72dc67a6 | 2440 | up_write(&kvm->slots_lock); |
5bb064dc ZX |
2441 | return r; |
2442 | } | |
2443 | ||
1fe779f8 CO |
2444 | long kvm_arch_vm_ioctl(struct file *filp, |
2445 | unsigned int ioctl, unsigned long arg) | |
2446 | { | |
2447 | struct kvm *kvm = filp->private_data; | |
2448 | void __user *argp = (void __user *)arg; | |
367e1319 | 2449 | int r = -ENOTTY; |
f0d66275 DH |
2450 | /* |
2451 | * This union makes it completely explicit to gcc-3.x | |
2452 | * that these two variables' stack usage should be | |
2453 | * combined, not added together. | |
2454 | */ | |
2455 | union { | |
2456 | struct kvm_pit_state ps; | |
e9f42757 | 2457 | struct kvm_pit_state2 ps2; |
f0d66275 | 2458 | struct kvm_memory_alias alias; |
c5ff41ce | 2459 | struct kvm_pit_config pit_config; |
f0d66275 | 2460 | } u; |
1fe779f8 CO |
2461 | |
2462 | switch (ioctl) { | |
2463 | case KVM_SET_TSS_ADDR: | |
2464 | r = kvm_vm_ioctl_set_tss_addr(kvm, arg); | |
2465 | if (r < 0) | |
2466 | goto out; | |
2467 | break; | |
b927a3ce SY |
2468 | case KVM_SET_IDENTITY_MAP_ADDR: { |
2469 | u64 ident_addr; | |
2470 | ||
2471 | r = -EFAULT; | |
2472 | if (copy_from_user(&ident_addr, argp, sizeof ident_addr)) | |
2473 | goto out; | |
2474 | r = kvm_vm_ioctl_set_identity_map_addr(kvm, ident_addr); | |
2475 | if (r < 0) | |
2476 | goto out; | |
2477 | break; | |
2478 | } | |
1fe779f8 CO |
2479 | case KVM_SET_MEMORY_REGION: { |
2480 | struct kvm_memory_region kvm_mem; | |
2481 | struct kvm_userspace_memory_region kvm_userspace_mem; | |
2482 | ||
2483 | r = -EFAULT; | |
2484 | if (copy_from_user(&kvm_mem, argp, sizeof kvm_mem)) | |
2485 | goto out; | |
2486 | kvm_userspace_mem.slot = kvm_mem.slot; | |
2487 | kvm_userspace_mem.flags = kvm_mem.flags; | |
2488 | kvm_userspace_mem.guest_phys_addr = kvm_mem.guest_phys_addr; | |
2489 | kvm_userspace_mem.memory_size = kvm_mem.memory_size; | |
2490 | r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_userspace_mem, 0); | |
2491 | if (r) | |
2492 | goto out; | |
2493 | break; | |
2494 | } | |
2495 | case KVM_SET_NR_MMU_PAGES: | |
2496 | r = kvm_vm_ioctl_set_nr_mmu_pages(kvm, arg); | |
2497 | if (r) | |
2498 | goto out; | |
2499 | break; | |
2500 | case KVM_GET_NR_MMU_PAGES: | |
2501 | r = kvm_vm_ioctl_get_nr_mmu_pages(kvm); | |
2502 | break; | |
f0d66275 | 2503 | case KVM_SET_MEMORY_ALIAS: |
1fe779f8 | 2504 | r = -EFAULT; |
f0d66275 | 2505 | if (copy_from_user(&u.alias, argp, sizeof(struct kvm_memory_alias))) |
1fe779f8 | 2506 | goto out; |
f0d66275 | 2507 | r = kvm_vm_ioctl_set_memory_alias(kvm, &u.alias); |
1fe779f8 CO |
2508 | if (r) |
2509 | goto out; | |
2510 | break; | |
3ddea128 MT |
2511 | case KVM_CREATE_IRQCHIP: { |
2512 | struct kvm_pic *vpic; | |
2513 | ||
2514 | mutex_lock(&kvm->lock); | |
2515 | r = -EEXIST; | |
2516 | if (kvm->arch.vpic) | |
2517 | goto create_irqchip_unlock; | |
1fe779f8 | 2518 | r = -ENOMEM; |
3ddea128 MT |
2519 | vpic = kvm_create_pic(kvm); |
2520 | if (vpic) { | |
1fe779f8 CO |
2521 | r = kvm_ioapic_init(kvm); |
2522 | if (r) { | |
3ddea128 MT |
2523 | kfree(vpic); |
2524 | goto create_irqchip_unlock; | |
1fe779f8 CO |
2525 | } |
2526 | } else | |
3ddea128 MT |
2527 | goto create_irqchip_unlock; |
2528 | smp_wmb(); | |
2529 | kvm->arch.vpic = vpic; | |
2530 | smp_wmb(); | |
399ec807 AK |
2531 | r = kvm_setup_default_irq_routing(kvm); |
2532 | if (r) { | |
3ddea128 | 2533 | mutex_lock(&kvm->irq_lock); |
399ec807 AK |
2534 | kfree(kvm->arch.vpic); |
2535 | kfree(kvm->arch.vioapic); | |
3ddea128 MT |
2536 | kvm->arch.vpic = NULL; |
2537 | kvm->arch.vioapic = NULL; | |
2538 | mutex_unlock(&kvm->irq_lock); | |
399ec807 | 2539 | } |
3ddea128 MT |
2540 | create_irqchip_unlock: |
2541 | mutex_unlock(&kvm->lock); | |
1fe779f8 | 2542 | break; |
3ddea128 | 2543 | } |
7837699f | 2544 | case KVM_CREATE_PIT: |
c5ff41ce JK |
2545 | u.pit_config.flags = KVM_PIT_SPEAKER_DUMMY; |
2546 | goto create_pit; | |
2547 | case KVM_CREATE_PIT2: | |
2548 | r = -EFAULT; | |
2549 | if (copy_from_user(&u.pit_config, argp, | |
2550 | sizeof(struct kvm_pit_config))) | |
2551 | goto out; | |
2552 | create_pit: | |
108b5669 | 2553 | down_write(&kvm->slots_lock); |
269e05e4 AK |
2554 | r = -EEXIST; |
2555 | if (kvm->arch.vpit) | |
2556 | goto create_pit_unlock; | |
7837699f | 2557 | r = -ENOMEM; |
c5ff41ce | 2558 | kvm->arch.vpit = kvm_create_pit(kvm, u.pit_config.flags); |
7837699f SY |
2559 | if (kvm->arch.vpit) |
2560 | r = 0; | |
269e05e4 | 2561 | create_pit_unlock: |
108b5669 | 2562 | up_write(&kvm->slots_lock); |
7837699f | 2563 | break; |
4925663a | 2564 | case KVM_IRQ_LINE_STATUS: |
1fe779f8 CO |
2565 | case KVM_IRQ_LINE: { |
2566 | struct kvm_irq_level irq_event; | |
2567 | ||
2568 | r = -EFAULT; | |
2569 | if (copy_from_user(&irq_event, argp, sizeof irq_event)) | |
2570 | goto out; | |
2571 | if (irqchip_in_kernel(kvm)) { | |
4925663a | 2572 | __s32 status; |
4925663a GN |
2573 | status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID, |
2574 | irq_event.irq, irq_event.level); | |
4925663a GN |
2575 | if (ioctl == KVM_IRQ_LINE_STATUS) { |
2576 | irq_event.status = status; | |
2577 | if (copy_to_user(argp, &irq_event, | |
2578 | sizeof irq_event)) | |
2579 | goto out; | |
2580 | } | |
1fe779f8 CO |
2581 | r = 0; |
2582 | } | |
2583 | break; | |
2584 | } | |
2585 | case KVM_GET_IRQCHIP: { | |
2586 | /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ | |
f0d66275 | 2587 | struct kvm_irqchip *chip = kmalloc(sizeof(*chip), GFP_KERNEL); |
1fe779f8 | 2588 | |
f0d66275 DH |
2589 | r = -ENOMEM; |
2590 | if (!chip) | |
1fe779f8 | 2591 | goto out; |
f0d66275 DH |
2592 | r = -EFAULT; |
2593 | if (copy_from_user(chip, argp, sizeof *chip)) | |
2594 | goto get_irqchip_out; | |
1fe779f8 CO |
2595 | r = -ENXIO; |
2596 | if (!irqchip_in_kernel(kvm)) | |
f0d66275 DH |
2597 | goto get_irqchip_out; |
2598 | r = kvm_vm_ioctl_get_irqchip(kvm, chip); | |
1fe779f8 | 2599 | if (r) |
f0d66275 | 2600 | goto get_irqchip_out; |
1fe779f8 | 2601 | r = -EFAULT; |
f0d66275 DH |
2602 | if (copy_to_user(argp, chip, sizeof *chip)) |
2603 | goto get_irqchip_out; | |
1fe779f8 | 2604 | r = 0; |
f0d66275 DH |
2605 | get_irqchip_out: |
2606 | kfree(chip); | |
2607 | if (r) | |
2608 | goto out; | |
1fe779f8 CO |
2609 | break; |
2610 | } | |
2611 | case KVM_SET_IRQCHIP: { | |
2612 | /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ | |
f0d66275 | 2613 | struct kvm_irqchip *chip = kmalloc(sizeof(*chip), GFP_KERNEL); |
1fe779f8 | 2614 | |
f0d66275 DH |
2615 | r = -ENOMEM; |
2616 | if (!chip) | |
1fe779f8 | 2617 | goto out; |
f0d66275 DH |
2618 | r = -EFAULT; |
2619 | if (copy_from_user(chip, argp, sizeof *chip)) | |
2620 | goto set_irqchip_out; | |
1fe779f8 CO |
2621 | r = -ENXIO; |
2622 | if (!irqchip_in_kernel(kvm)) | |
f0d66275 DH |
2623 | goto set_irqchip_out; |
2624 | r = kvm_vm_ioctl_set_irqchip(kvm, chip); | |
1fe779f8 | 2625 | if (r) |
f0d66275 | 2626 | goto set_irqchip_out; |
1fe779f8 | 2627 | r = 0; |
f0d66275 DH |
2628 | set_irqchip_out: |
2629 | kfree(chip); | |
2630 | if (r) | |
2631 | goto out; | |
1fe779f8 CO |
2632 | break; |
2633 | } | |
e0f63cb9 | 2634 | case KVM_GET_PIT: { |
e0f63cb9 | 2635 | r = -EFAULT; |
f0d66275 | 2636 | if (copy_from_user(&u.ps, argp, sizeof(struct kvm_pit_state))) |
e0f63cb9 SY |
2637 | goto out; |
2638 | r = -ENXIO; | |
2639 | if (!kvm->arch.vpit) | |
2640 | goto out; | |
f0d66275 | 2641 | r = kvm_vm_ioctl_get_pit(kvm, &u.ps); |
e0f63cb9 SY |
2642 | if (r) |
2643 | goto out; | |
2644 | r = -EFAULT; | |
f0d66275 | 2645 | if (copy_to_user(argp, &u.ps, sizeof(struct kvm_pit_state))) |
e0f63cb9 SY |
2646 | goto out; |
2647 | r = 0; | |
2648 | break; | |
2649 | } | |
2650 | case KVM_SET_PIT: { | |
e0f63cb9 | 2651 | r = -EFAULT; |
f0d66275 | 2652 | if (copy_from_user(&u.ps, argp, sizeof u.ps)) |
e0f63cb9 SY |
2653 | goto out; |
2654 | r = -ENXIO; | |
2655 | if (!kvm->arch.vpit) | |
2656 | goto out; | |
f0d66275 | 2657 | r = kvm_vm_ioctl_set_pit(kvm, &u.ps); |
e0f63cb9 SY |
2658 | if (r) |
2659 | goto out; | |
2660 | r = 0; | |
2661 | break; | |
2662 | } | |
e9f42757 BK |
2663 | case KVM_GET_PIT2: { |
2664 | r = -ENXIO; | |
2665 | if (!kvm->arch.vpit) | |
2666 | goto out; | |
2667 | r = kvm_vm_ioctl_get_pit2(kvm, &u.ps2); | |
2668 | if (r) | |
2669 | goto out; | |
2670 | r = -EFAULT; | |
2671 | if (copy_to_user(argp, &u.ps2, sizeof(u.ps2))) | |
2672 | goto out; | |
2673 | r = 0; | |
2674 | break; | |
2675 | } | |
2676 | case KVM_SET_PIT2: { | |
2677 | r = -EFAULT; | |
2678 | if (copy_from_user(&u.ps2, argp, sizeof(u.ps2))) | |
2679 | goto out; | |
2680 | r = -ENXIO; | |
2681 | if (!kvm->arch.vpit) | |
2682 | goto out; | |
2683 | r = kvm_vm_ioctl_set_pit2(kvm, &u.ps2); | |
2684 | if (r) | |
2685 | goto out; | |
2686 | r = 0; | |
2687 | break; | |
2688 | } | |
52d939a0 MT |
2689 | case KVM_REINJECT_CONTROL: { |
2690 | struct kvm_reinject_control control; | |
2691 | r = -EFAULT; | |
2692 | if (copy_from_user(&control, argp, sizeof(control))) | |
2693 | goto out; | |
2694 | r = kvm_vm_ioctl_reinject(kvm, &control); | |
2695 | if (r) | |
2696 | goto out; | |
2697 | r = 0; | |
2698 | break; | |
2699 | } | |
ffde22ac ES |
2700 | case KVM_XEN_HVM_CONFIG: { |
2701 | r = -EFAULT; | |
2702 | if (copy_from_user(&kvm->arch.xen_hvm_config, argp, | |
2703 | sizeof(struct kvm_xen_hvm_config))) | |
2704 | goto out; | |
2705 | r = -EINVAL; | |
2706 | if (kvm->arch.xen_hvm_config.flags) | |
2707 | goto out; | |
2708 | r = 0; | |
2709 | break; | |
2710 | } | |
afbcf7ab GC |
2711 | case KVM_SET_CLOCK: { |
2712 | struct timespec now; | |
2713 | struct kvm_clock_data user_ns; | |
2714 | u64 now_ns; | |
2715 | s64 delta; | |
2716 | ||
2717 | r = -EFAULT; | |
2718 | if (copy_from_user(&user_ns, argp, sizeof(user_ns))) | |
2719 | goto out; | |
2720 | ||
2721 | r = -EINVAL; | |
2722 | if (user_ns.flags) | |
2723 | goto out; | |
2724 | ||
2725 | r = 0; | |
2726 | ktime_get_ts(&now); | |
2727 | now_ns = timespec_to_ns(&now); | |
2728 | delta = user_ns.clock - now_ns; | |
2729 | kvm->arch.kvmclock_offset = delta; | |
2730 | break; | |
2731 | } | |
2732 | case KVM_GET_CLOCK: { | |
2733 | struct timespec now; | |
2734 | struct kvm_clock_data user_ns; | |
2735 | u64 now_ns; | |
2736 | ||
2737 | ktime_get_ts(&now); | |
2738 | now_ns = timespec_to_ns(&now); | |
2739 | user_ns.clock = kvm->arch.kvmclock_offset + now_ns; | |
2740 | user_ns.flags = 0; | |
2741 | ||
2742 | r = -EFAULT; | |
2743 | if (copy_to_user(argp, &user_ns, sizeof(user_ns))) | |
2744 | goto out; | |
2745 | r = 0; | |
2746 | break; | |
2747 | } | |
2748 | ||
1fe779f8 CO |
2749 | default: |
2750 | ; | |
2751 | } | |
2752 | out: | |
2753 | return r; | |
2754 | } | |
2755 | ||
a16b043c | 2756 | static void kvm_init_msr_list(void) |
043405e1 CO |
2757 | { |
2758 | u32 dummy[2]; | |
2759 | unsigned i, j; | |
2760 | ||
e3267cbb GC |
2761 | /* skip the first msrs in the list. KVM-specific */ |
2762 | for (i = j = KVM_SAVE_MSRS_BEGIN; i < ARRAY_SIZE(msrs_to_save); i++) { | |
043405e1 CO |
2763 | if (rdmsr_safe(msrs_to_save[i], &dummy[0], &dummy[1]) < 0) |
2764 | continue; | |
2765 | if (j < i) | |
2766 | msrs_to_save[j] = msrs_to_save[i]; | |
2767 | j++; | |
2768 | } | |
2769 | num_msrs_to_save = j; | |
2770 | } | |
2771 | ||
bda9020e MT |
2772 | static int vcpu_mmio_write(struct kvm_vcpu *vcpu, gpa_t addr, int len, |
2773 | const void *v) | |
bbd9b64e | 2774 | { |
bda9020e MT |
2775 | if (vcpu->arch.apic && |
2776 | !kvm_iodevice_write(&vcpu->arch.apic->dev, addr, len, v)) | |
2777 | return 0; | |
bbd9b64e | 2778 | |
bda9020e | 2779 | return kvm_io_bus_write(&vcpu->kvm->mmio_bus, addr, len, v); |
bbd9b64e CO |
2780 | } |
2781 | ||
bda9020e | 2782 | static int vcpu_mmio_read(struct kvm_vcpu *vcpu, gpa_t addr, int len, void *v) |
bbd9b64e | 2783 | { |
bda9020e MT |
2784 | if (vcpu->arch.apic && |
2785 | !kvm_iodevice_read(&vcpu->arch.apic->dev, addr, len, v)) | |
2786 | return 0; | |
bbd9b64e | 2787 | |
bda9020e | 2788 | return kvm_io_bus_read(&vcpu->kvm->mmio_bus, addr, len, v); |
bbd9b64e CO |
2789 | } |
2790 | ||
cded19f3 HE |
2791 | static int kvm_read_guest_virt(gva_t addr, void *val, unsigned int bytes, |
2792 | struct kvm_vcpu *vcpu) | |
bbd9b64e CO |
2793 | { |
2794 | void *data = val; | |
10589a46 | 2795 | int r = X86EMUL_CONTINUE; |
bbd9b64e CO |
2796 | |
2797 | while (bytes) { | |
ad312c7c | 2798 | gpa_t gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr); |
bbd9b64e | 2799 | unsigned offset = addr & (PAGE_SIZE-1); |
77c2002e | 2800 | unsigned toread = min(bytes, (unsigned)PAGE_SIZE - offset); |
bbd9b64e CO |
2801 | int ret; |
2802 | ||
10589a46 MT |
2803 | if (gpa == UNMAPPED_GVA) { |
2804 | r = X86EMUL_PROPAGATE_FAULT; | |
2805 | goto out; | |
2806 | } | |
77c2002e | 2807 | ret = kvm_read_guest(vcpu->kvm, gpa, data, toread); |
10589a46 MT |
2808 | if (ret < 0) { |
2809 | r = X86EMUL_UNHANDLEABLE; | |
2810 | goto out; | |
2811 | } | |
bbd9b64e | 2812 | |
77c2002e IE |
2813 | bytes -= toread; |
2814 | data += toread; | |
2815 | addr += toread; | |
bbd9b64e | 2816 | } |
10589a46 | 2817 | out: |
10589a46 | 2818 | return r; |
bbd9b64e | 2819 | } |
77c2002e | 2820 | |
cded19f3 HE |
2821 | static int kvm_write_guest_virt(gva_t addr, void *val, unsigned int bytes, |
2822 | struct kvm_vcpu *vcpu) | |
77c2002e IE |
2823 | { |
2824 | void *data = val; | |
2825 | int r = X86EMUL_CONTINUE; | |
2826 | ||
2827 | while (bytes) { | |
2828 | gpa_t gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr); | |
2829 | unsigned offset = addr & (PAGE_SIZE-1); | |
2830 | unsigned towrite = min(bytes, (unsigned)PAGE_SIZE - offset); | |
2831 | int ret; | |
2832 | ||
2833 | if (gpa == UNMAPPED_GVA) { | |
2834 | r = X86EMUL_PROPAGATE_FAULT; | |
2835 | goto out; | |
2836 | } | |
2837 | ret = kvm_write_guest(vcpu->kvm, gpa, data, towrite); | |
2838 | if (ret < 0) { | |
2839 | r = X86EMUL_UNHANDLEABLE; | |
2840 | goto out; | |
2841 | } | |
2842 | ||
2843 | bytes -= towrite; | |
2844 | data += towrite; | |
2845 | addr += towrite; | |
2846 | } | |
2847 | out: | |
2848 | return r; | |
2849 | } | |
2850 | ||
bbd9b64e | 2851 | |
bbd9b64e CO |
2852 | static int emulator_read_emulated(unsigned long addr, |
2853 | void *val, | |
2854 | unsigned int bytes, | |
2855 | struct kvm_vcpu *vcpu) | |
2856 | { | |
bbd9b64e CO |
2857 | gpa_t gpa; |
2858 | ||
2859 | if (vcpu->mmio_read_completed) { | |
2860 | memcpy(val, vcpu->mmio_data, bytes); | |
aec51dc4 AK |
2861 | trace_kvm_mmio(KVM_TRACE_MMIO_READ, bytes, |
2862 | vcpu->mmio_phys_addr, *(u64 *)val); | |
bbd9b64e CO |
2863 | vcpu->mmio_read_completed = 0; |
2864 | return X86EMUL_CONTINUE; | |
2865 | } | |
2866 | ||
ad312c7c | 2867 | gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr); |
bbd9b64e CO |
2868 | |
2869 | /* For APIC access vmexit */ | |
2870 | if ((gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) | |
2871 | goto mmio; | |
2872 | ||
77c2002e IE |
2873 | if (kvm_read_guest_virt(addr, val, bytes, vcpu) |
2874 | == X86EMUL_CONTINUE) | |
bbd9b64e CO |
2875 | return X86EMUL_CONTINUE; |
2876 | if (gpa == UNMAPPED_GVA) | |
2877 | return X86EMUL_PROPAGATE_FAULT; | |
2878 | ||
2879 | mmio: | |
2880 | /* | |
2881 | * Is this MMIO handled locally? | |
2882 | */ | |
aec51dc4 AK |
2883 | if (!vcpu_mmio_read(vcpu, gpa, bytes, val)) { |
2884 | trace_kvm_mmio(KVM_TRACE_MMIO_READ, bytes, gpa, *(u64 *)val); | |
bbd9b64e CO |
2885 | return X86EMUL_CONTINUE; |
2886 | } | |
aec51dc4 AK |
2887 | |
2888 | trace_kvm_mmio(KVM_TRACE_MMIO_READ_UNSATISFIED, bytes, gpa, 0); | |
bbd9b64e CO |
2889 | |
2890 | vcpu->mmio_needed = 1; | |
2891 | vcpu->mmio_phys_addr = gpa; | |
2892 | vcpu->mmio_size = bytes; | |
2893 | vcpu->mmio_is_write = 0; | |
2894 | ||
2895 | return X86EMUL_UNHANDLEABLE; | |
2896 | } | |
2897 | ||
3200f405 | 2898 | int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa, |
9f811285 | 2899 | const void *val, int bytes) |
bbd9b64e CO |
2900 | { |
2901 | int ret; | |
2902 | ||
2903 | ret = kvm_write_guest(vcpu->kvm, gpa, val, bytes); | |
9f811285 | 2904 | if (ret < 0) |
bbd9b64e | 2905 | return 0; |
ad218f85 | 2906 | kvm_mmu_pte_write(vcpu, gpa, val, bytes, 1); |
bbd9b64e CO |
2907 | return 1; |
2908 | } | |
2909 | ||
2910 | static int emulator_write_emulated_onepage(unsigned long addr, | |
2911 | const void *val, | |
2912 | unsigned int bytes, | |
2913 | struct kvm_vcpu *vcpu) | |
2914 | { | |
10589a46 MT |
2915 | gpa_t gpa; |
2916 | ||
10589a46 | 2917 | gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr); |
bbd9b64e CO |
2918 | |
2919 | if (gpa == UNMAPPED_GVA) { | |
c3c91fee | 2920 | kvm_inject_page_fault(vcpu, addr, 2); |
bbd9b64e CO |
2921 | return X86EMUL_PROPAGATE_FAULT; |
2922 | } | |
2923 | ||
2924 | /* For APIC access vmexit */ | |
2925 | if ((gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) | |
2926 | goto mmio; | |
2927 | ||
2928 | if (emulator_write_phys(vcpu, gpa, val, bytes)) | |
2929 | return X86EMUL_CONTINUE; | |
2930 | ||
2931 | mmio: | |
aec51dc4 | 2932 | trace_kvm_mmio(KVM_TRACE_MMIO_WRITE, bytes, gpa, *(u64 *)val); |
bbd9b64e CO |
2933 | /* |
2934 | * Is this MMIO handled locally? | |
2935 | */ | |
bda9020e | 2936 | if (!vcpu_mmio_write(vcpu, gpa, bytes, val)) |
bbd9b64e | 2937 | return X86EMUL_CONTINUE; |
bbd9b64e CO |
2938 | |
2939 | vcpu->mmio_needed = 1; | |
2940 | vcpu->mmio_phys_addr = gpa; | |
2941 | vcpu->mmio_size = bytes; | |
2942 | vcpu->mmio_is_write = 1; | |
2943 | memcpy(vcpu->mmio_data, val, bytes); | |
2944 | ||
2945 | return X86EMUL_CONTINUE; | |
2946 | } | |
2947 | ||
2948 | int emulator_write_emulated(unsigned long addr, | |
2949 | const void *val, | |
2950 | unsigned int bytes, | |
2951 | struct kvm_vcpu *vcpu) | |
2952 | { | |
2953 | /* Crossing a page boundary? */ | |
2954 | if (((addr + bytes - 1) ^ addr) & PAGE_MASK) { | |
2955 | int rc, now; | |
2956 | ||
2957 | now = -addr & ~PAGE_MASK; | |
2958 | rc = emulator_write_emulated_onepage(addr, val, now, vcpu); | |
2959 | if (rc != X86EMUL_CONTINUE) | |
2960 | return rc; | |
2961 | addr += now; | |
2962 | val += now; | |
2963 | bytes -= now; | |
2964 | } | |
2965 | return emulator_write_emulated_onepage(addr, val, bytes, vcpu); | |
2966 | } | |
2967 | EXPORT_SYMBOL_GPL(emulator_write_emulated); | |
2968 | ||
2969 | static int emulator_cmpxchg_emulated(unsigned long addr, | |
2970 | const void *old, | |
2971 | const void *new, | |
2972 | unsigned int bytes, | |
2973 | struct kvm_vcpu *vcpu) | |
2974 | { | |
9f51e24e | 2975 | printk_once(KERN_WARNING "kvm: emulating exchange as write\n"); |
2bacc55c MT |
2976 | #ifndef CONFIG_X86_64 |
2977 | /* guests cmpxchg8b have to be emulated atomically */ | |
2978 | if (bytes == 8) { | |
10589a46 | 2979 | gpa_t gpa; |
2bacc55c | 2980 | struct page *page; |
c0b49b0d | 2981 | char *kaddr; |
2bacc55c MT |
2982 | u64 val; |
2983 | ||
10589a46 MT |
2984 | gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr); |
2985 | ||
2bacc55c MT |
2986 | if (gpa == UNMAPPED_GVA || |
2987 | (gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) | |
2988 | goto emul_write; | |
2989 | ||
2990 | if (((gpa + bytes - 1) & PAGE_MASK) != (gpa & PAGE_MASK)) | |
2991 | goto emul_write; | |
2992 | ||
2993 | val = *(u64 *)new; | |
72dc67a6 | 2994 | |
2bacc55c | 2995 | page = gfn_to_page(vcpu->kvm, gpa >> PAGE_SHIFT); |
72dc67a6 | 2996 | |
c0b49b0d AM |
2997 | kaddr = kmap_atomic(page, KM_USER0); |
2998 | set_64bit((u64 *)(kaddr + offset_in_page(gpa)), val); | |
2999 | kunmap_atomic(kaddr, KM_USER0); | |
2bacc55c MT |
3000 | kvm_release_page_dirty(page); |
3001 | } | |
3200f405 | 3002 | emul_write: |
2bacc55c MT |
3003 | #endif |
3004 | ||
bbd9b64e CO |
3005 | return emulator_write_emulated(addr, new, bytes, vcpu); |
3006 | } | |
3007 | ||
3008 | static unsigned long get_segment_base(struct kvm_vcpu *vcpu, int seg) | |
3009 | { | |
3010 | return kvm_x86_ops->get_segment_base(vcpu, seg); | |
3011 | } | |
3012 | ||
3013 | int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address) | |
3014 | { | |
a7052897 | 3015 | kvm_mmu_invlpg(vcpu, address); |
bbd9b64e CO |
3016 | return X86EMUL_CONTINUE; |
3017 | } | |
3018 | ||
3019 | int emulate_clts(struct kvm_vcpu *vcpu) | |
3020 | { | |
ad312c7c | 3021 | kvm_x86_ops->set_cr0(vcpu, vcpu->arch.cr0 & ~X86_CR0_TS); |
bbd9b64e CO |
3022 | return X86EMUL_CONTINUE; |
3023 | } | |
3024 | ||
3025 | int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long *dest) | |
3026 | { | |
3027 | struct kvm_vcpu *vcpu = ctxt->vcpu; | |
3028 | ||
3029 | switch (dr) { | |
3030 | case 0 ... 3: | |
3031 | *dest = kvm_x86_ops->get_dr(vcpu, dr); | |
3032 | return X86EMUL_CONTINUE; | |
3033 | default: | |
b8688d51 | 3034 | pr_unimpl(vcpu, "%s: unexpected dr %u\n", __func__, dr); |
bbd9b64e CO |
3035 | return X86EMUL_UNHANDLEABLE; |
3036 | } | |
3037 | } | |
3038 | ||
3039 | int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long value) | |
3040 | { | |
3041 | unsigned long mask = (ctxt->mode == X86EMUL_MODE_PROT64) ? ~0ULL : ~0U; | |
3042 | int exception; | |
3043 | ||
3044 | kvm_x86_ops->set_dr(ctxt->vcpu, dr, value & mask, &exception); | |
3045 | if (exception) { | |
3046 | /* FIXME: better handling */ | |
3047 | return X86EMUL_UNHANDLEABLE; | |
3048 | } | |
3049 | return X86EMUL_CONTINUE; | |
3050 | } | |
3051 | ||
3052 | void kvm_report_emulation_failure(struct kvm_vcpu *vcpu, const char *context) | |
3053 | { | |
bbd9b64e | 3054 | u8 opcodes[4]; |
5fdbf976 | 3055 | unsigned long rip = kvm_rip_read(vcpu); |
bbd9b64e CO |
3056 | unsigned long rip_linear; |
3057 | ||
f76c710d | 3058 | if (!printk_ratelimit()) |
bbd9b64e CO |
3059 | return; |
3060 | ||
25be4608 GC |
3061 | rip_linear = rip + get_segment_base(vcpu, VCPU_SREG_CS); |
3062 | ||
77c2002e | 3063 | kvm_read_guest_virt(rip_linear, (void *)opcodes, 4, vcpu); |
bbd9b64e CO |
3064 | |
3065 | printk(KERN_ERR "emulation failed (%s) rip %lx %02x %02x %02x %02x\n", | |
3066 | context, rip, opcodes[0], opcodes[1], opcodes[2], opcodes[3]); | |
bbd9b64e CO |
3067 | } |
3068 | EXPORT_SYMBOL_GPL(kvm_report_emulation_failure); | |
3069 | ||
14af3f3c | 3070 | static struct x86_emulate_ops emulate_ops = { |
77c2002e | 3071 | .read_std = kvm_read_guest_virt, |
bbd9b64e CO |
3072 | .read_emulated = emulator_read_emulated, |
3073 | .write_emulated = emulator_write_emulated, | |
3074 | .cmpxchg_emulated = emulator_cmpxchg_emulated, | |
3075 | }; | |
3076 | ||
5fdbf976 MT |
3077 | static void cache_all_regs(struct kvm_vcpu *vcpu) |
3078 | { | |
3079 | kvm_register_read(vcpu, VCPU_REGS_RAX); | |
3080 | kvm_register_read(vcpu, VCPU_REGS_RSP); | |
3081 | kvm_register_read(vcpu, VCPU_REGS_RIP); | |
3082 | vcpu->arch.regs_dirty = ~0; | |
3083 | } | |
3084 | ||
bbd9b64e | 3085 | int emulate_instruction(struct kvm_vcpu *vcpu, |
bbd9b64e CO |
3086 | unsigned long cr2, |
3087 | u16 error_code, | |
571008da | 3088 | int emulation_type) |
bbd9b64e | 3089 | { |
310b5d30 | 3090 | int r, shadow_mask; |
571008da | 3091 | struct decode_cache *c; |
851ba692 | 3092 | struct kvm_run *run = vcpu->run; |
bbd9b64e | 3093 | |
26eef70c | 3094 | kvm_clear_exception_queue(vcpu); |
ad312c7c | 3095 | vcpu->arch.mmio_fault_cr2 = cr2; |
5fdbf976 | 3096 | /* |
56e82318 | 3097 | * TODO: fix emulate.c to use guest_read/write_register |
5fdbf976 MT |
3098 | * instead of direct ->regs accesses, can save hundred cycles |
3099 | * on Intel for instructions that don't read/change RSP, for | |
3100 | * for example. | |
3101 | */ | |
3102 | cache_all_regs(vcpu); | |
bbd9b64e CO |
3103 | |
3104 | vcpu->mmio_is_write = 0; | |
ad312c7c | 3105 | vcpu->arch.pio.string = 0; |
bbd9b64e | 3106 | |
571008da | 3107 | if (!(emulation_type & EMULTYPE_NO_DECODE)) { |
bbd9b64e CO |
3108 | int cs_db, cs_l; |
3109 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); | |
3110 | ||
ad312c7c | 3111 | vcpu->arch.emulate_ctxt.vcpu = vcpu; |
91586a3b | 3112 | vcpu->arch.emulate_ctxt.eflags = kvm_get_rflags(vcpu); |
ad312c7c ZX |
3113 | vcpu->arch.emulate_ctxt.mode = |
3114 | (vcpu->arch.emulate_ctxt.eflags & X86_EFLAGS_VM) | |
bbd9b64e CO |
3115 | ? X86EMUL_MODE_REAL : cs_l |
3116 | ? X86EMUL_MODE_PROT64 : cs_db | |
3117 | ? X86EMUL_MODE_PROT32 : X86EMUL_MODE_PROT16; | |
3118 | ||
ad312c7c | 3119 | r = x86_decode_insn(&vcpu->arch.emulate_ctxt, &emulate_ops); |
571008da | 3120 | |
0cb5762e AP |
3121 | /* Only allow emulation of specific instructions on #UD |
3122 | * (namely VMMCALL, sysenter, sysexit, syscall)*/ | |
571008da | 3123 | c = &vcpu->arch.emulate_ctxt.decode; |
0cb5762e AP |
3124 | if (emulation_type & EMULTYPE_TRAP_UD) { |
3125 | if (!c->twobyte) | |
3126 | return EMULATE_FAIL; | |
3127 | switch (c->b) { | |
3128 | case 0x01: /* VMMCALL */ | |
3129 | if (c->modrm_mod != 3 || c->modrm_rm != 1) | |
3130 | return EMULATE_FAIL; | |
3131 | break; | |
3132 | case 0x34: /* sysenter */ | |
3133 | case 0x35: /* sysexit */ | |
3134 | if (c->modrm_mod != 0 || c->modrm_rm != 0) | |
3135 | return EMULATE_FAIL; | |
3136 | break; | |
3137 | case 0x05: /* syscall */ | |
3138 | if (c->modrm_mod != 0 || c->modrm_rm != 0) | |
3139 | return EMULATE_FAIL; | |
3140 | break; | |
3141 | default: | |
3142 | return EMULATE_FAIL; | |
3143 | } | |
3144 | ||
3145 | if (!(c->modrm_reg == 0 || c->modrm_reg == 3)) | |
3146 | return EMULATE_FAIL; | |
3147 | } | |
571008da | 3148 | |
f2b5756b | 3149 | ++vcpu->stat.insn_emulation; |
bbd9b64e | 3150 | if (r) { |
f2b5756b | 3151 | ++vcpu->stat.insn_emulation_fail; |
bbd9b64e CO |
3152 | if (kvm_mmu_unprotect_page_virt(vcpu, cr2)) |
3153 | return EMULATE_DONE; | |
3154 | return EMULATE_FAIL; | |
3155 | } | |
3156 | } | |
3157 | ||
ba8afb6b GN |
3158 | if (emulation_type & EMULTYPE_SKIP) { |
3159 | kvm_rip_write(vcpu, vcpu->arch.emulate_ctxt.decode.eip); | |
3160 | return EMULATE_DONE; | |
3161 | } | |
3162 | ||
ad312c7c | 3163 | r = x86_emulate_insn(&vcpu->arch.emulate_ctxt, &emulate_ops); |
310b5d30 GC |
3164 | shadow_mask = vcpu->arch.emulate_ctxt.interruptibility; |
3165 | ||
3166 | if (r == 0) | |
3167 | kvm_x86_ops->set_interrupt_shadow(vcpu, shadow_mask); | |
bbd9b64e | 3168 | |
ad312c7c | 3169 | if (vcpu->arch.pio.string) |
bbd9b64e CO |
3170 | return EMULATE_DO_MMIO; |
3171 | ||
3172 | if ((r || vcpu->mmio_is_write) && run) { | |
3173 | run->exit_reason = KVM_EXIT_MMIO; | |
3174 | run->mmio.phys_addr = vcpu->mmio_phys_addr; | |
3175 | memcpy(run->mmio.data, vcpu->mmio_data, 8); | |
3176 | run->mmio.len = vcpu->mmio_size; | |
3177 | run->mmio.is_write = vcpu->mmio_is_write; | |
3178 | } | |
3179 | ||
3180 | if (r) { | |
3181 | if (kvm_mmu_unprotect_page_virt(vcpu, cr2)) | |
3182 | return EMULATE_DONE; | |
3183 | if (!vcpu->mmio_needed) { | |
3184 | kvm_report_emulation_failure(vcpu, "mmio"); | |
3185 | return EMULATE_FAIL; | |
3186 | } | |
3187 | return EMULATE_DO_MMIO; | |
3188 | } | |
3189 | ||
91586a3b | 3190 | kvm_set_rflags(vcpu, vcpu->arch.emulate_ctxt.eflags); |
bbd9b64e CO |
3191 | |
3192 | if (vcpu->mmio_is_write) { | |
3193 | vcpu->mmio_needed = 0; | |
3194 | return EMULATE_DO_MMIO; | |
3195 | } | |
3196 | ||
3197 | return EMULATE_DONE; | |
3198 | } | |
3199 | EXPORT_SYMBOL_GPL(emulate_instruction); | |
3200 | ||
de7d789a CO |
3201 | static int pio_copy_data(struct kvm_vcpu *vcpu) |
3202 | { | |
ad312c7c | 3203 | void *p = vcpu->arch.pio_data; |
0f346074 | 3204 | gva_t q = vcpu->arch.pio.guest_gva; |
de7d789a | 3205 | unsigned bytes; |
0f346074 | 3206 | int ret; |
de7d789a | 3207 | |
ad312c7c ZX |
3208 | bytes = vcpu->arch.pio.size * vcpu->arch.pio.cur_count; |
3209 | if (vcpu->arch.pio.in) | |
0f346074 | 3210 | ret = kvm_write_guest_virt(q, p, bytes, vcpu); |
de7d789a | 3211 | else |
0f346074 IE |
3212 | ret = kvm_read_guest_virt(q, p, bytes, vcpu); |
3213 | return ret; | |
de7d789a CO |
3214 | } |
3215 | ||
3216 | int complete_pio(struct kvm_vcpu *vcpu) | |
3217 | { | |
ad312c7c | 3218 | struct kvm_pio_request *io = &vcpu->arch.pio; |
de7d789a CO |
3219 | long delta; |
3220 | int r; | |
5fdbf976 | 3221 | unsigned long val; |
de7d789a CO |
3222 | |
3223 | if (!io->string) { | |
5fdbf976 MT |
3224 | if (io->in) { |
3225 | val = kvm_register_read(vcpu, VCPU_REGS_RAX); | |
3226 | memcpy(&val, vcpu->arch.pio_data, io->size); | |
3227 | kvm_register_write(vcpu, VCPU_REGS_RAX, val); | |
3228 | } | |
de7d789a CO |
3229 | } else { |
3230 | if (io->in) { | |
3231 | r = pio_copy_data(vcpu); | |
5fdbf976 | 3232 | if (r) |
de7d789a | 3233 | return r; |
de7d789a CO |
3234 | } |
3235 | ||
3236 | delta = 1; | |
3237 | if (io->rep) { | |
3238 | delta *= io->cur_count; | |
3239 | /* | |
3240 | * The size of the register should really depend on | |
3241 | * current address size. | |
3242 | */ | |
5fdbf976 MT |
3243 | val = kvm_register_read(vcpu, VCPU_REGS_RCX); |
3244 | val -= delta; | |
3245 | kvm_register_write(vcpu, VCPU_REGS_RCX, val); | |
de7d789a CO |
3246 | } |
3247 | if (io->down) | |
3248 | delta = -delta; | |
3249 | delta *= io->size; | |
5fdbf976 MT |
3250 | if (io->in) { |
3251 | val = kvm_register_read(vcpu, VCPU_REGS_RDI); | |
3252 | val += delta; | |
3253 | kvm_register_write(vcpu, VCPU_REGS_RDI, val); | |
3254 | } else { | |
3255 | val = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
3256 | val += delta; | |
3257 | kvm_register_write(vcpu, VCPU_REGS_RSI, val); | |
3258 | } | |
de7d789a CO |
3259 | } |
3260 | ||
de7d789a CO |
3261 | io->count -= io->cur_count; |
3262 | io->cur_count = 0; | |
3263 | ||
3264 | return 0; | |
3265 | } | |
3266 | ||
bda9020e | 3267 | static int kernel_pio(struct kvm_vcpu *vcpu, void *pd) |
de7d789a CO |
3268 | { |
3269 | /* TODO: String I/O for in kernel device */ | |
bda9020e | 3270 | int r; |
de7d789a | 3271 | |
ad312c7c | 3272 | if (vcpu->arch.pio.in) |
bda9020e MT |
3273 | r = kvm_io_bus_read(&vcpu->kvm->pio_bus, vcpu->arch.pio.port, |
3274 | vcpu->arch.pio.size, pd); | |
de7d789a | 3275 | else |
bda9020e MT |
3276 | r = kvm_io_bus_write(&vcpu->kvm->pio_bus, vcpu->arch.pio.port, |
3277 | vcpu->arch.pio.size, pd); | |
3278 | return r; | |
de7d789a CO |
3279 | } |
3280 | ||
bda9020e | 3281 | static int pio_string_write(struct kvm_vcpu *vcpu) |
de7d789a | 3282 | { |
ad312c7c ZX |
3283 | struct kvm_pio_request *io = &vcpu->arch.pio; |
3284 | void *pd = vcpu->arch.pio_data; | |
bda9020e | 3285 | int i, r = 0; |
de7d789a | 3286 | |
de7d789a | 3287 | for (i = 0; i < io->cur_count; i++) { |
bda9020e MT |
3288 | if (kvm_io_bus_write(&vcpu->kvm->pio_bus, |
3289 | io->port, io->size, pd)) { | |
3290 | r = -EOPNOTSUPP; | |
3291 | break; | |
3292 | } | |
de7d789a CO |
3293 | pd += io->size; |
3294 | } | |
bda9020e | 3295 | return r; |
de7d789a CO |
3296 | } |
3297 | ||
851ba692 | 3298 | int kvm_emulate_pio(struct kvm_vcpu *vcpu, int in, int size, unsigned port) |
de7d789a | 3299 | { |
5fdbf976 | 3300 | unsigned long val; |
de7d789a CO |
3301 | |
3302 | vcpu->run->exit_reason = KVM_EXIT_IO; | |
3303 | vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT; | |
ad312c7c | 3304 | vcpu->run->io.size = vcpu->arch.pio.size = size; |
de7d789a | 3305 | vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE; |
ad312c7c ZX |
3306 | vcpu->run->io.count = vcpu->arch.pio.count = vcpu->arch.pio.cur_count = 1; |
3307 | vcpu->run->io.port = vcpu->arch.pio.port = port; | |
3308 | vcpu->arch.pio.in = in; | |
3309 | vcpu->arch.pio.string = 0; | |
3310 | vcpu->arch.pio.down = 0; | |
ad312c7c | 3311 | vcpu->arch.pio.rep = 0; |
de7d789a | 3312 | |
229456fc MT |
3313 | trace_kvm_pio(vcpu->run->io.direction == KVM_EXIT_IO_OUT, port, |
3314 | size, 1); | |
2714d1d3 | 3315 | |
5fdbf976 MT |
3316 | val = kvm_register_read(vcpu, VCPU_REGS_RAX); |
3317 | memcpy(vcpu->arch.pio_data, &val, 4); | |
de7d789a | 3318 | |
bda9020e | 3319 | if (!kernel_pio(vcpu, vcpu->arch.pio_data)) { |
de7d789a CO |
3320 | complete_pio(vcpu); |
3321 | return 1; | |
3322 | } | |
3323 | return 0; | |
3324 | } | |
3325 | EXPORT_SYMBOL_GPL(kvm_emulate_pio); | |
3326 | ||
851ba692 | 3327 | int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, int in, |
de7d789a CO |
3328 | int size, unsigned long count, int down, |
3329 | gva_t address, int rep, unsigned port) | |
3330 | { | |
3331 | unsigned now, in_page; | |
0f346074 | 3332 | int ret = 0; |
de7d789a CO |
3333 | |
3334 | vcpu->run->exit_reason = KVM_EXIT_IO; | |
3335 | vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT; | |
ad312c7c | 3336 | vcpu->run->io.size = vcpu->arch.pio.size = size; |
de7d789a | 3337 | vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE; |
ad312c7c ZX |
3338 | vcpu->run->io.count = vcpu->arch.pio.count = vcpu->arch.pio.cur_count = count; |
3339 | vcpu->run->io.port = vcpu->arch.pio.port = port; | |
3340 | vcpu->arch.pio.in = in; | |
3341 | vcpu->arch.pio.string = 1; | |
3342 | vcpu->arch.pio.down = down; | |
ad312c7c | 3343 | vcpu->arch.pio.rep = rep; |
de7d789a | 3344 | |
229456fc MT |
3345 | trace_kvm_pio(vcpu->run->io.direction == KVM_EXIT_IO_OUT, port, |
3346 | size, count); | |
2714d1d3 | 3347 | |
de7d789a CO |
3348 | if (!count) { |
3349 | kvm_x86_ops->skip_emulated_instruction(vcpu); | |
3350 | return 1; | |
3351 | } | |
3352 | ||
3353 | if (!down) | |
3354 | in_page = PAGE_SIZE - offset_in_page(address); | |
3355 | else | |
3356 | in_page = offset_in_page(address) + size; | |
3357 | now = min(count, (unsigned long)in_page / size); | |
0f346074 | 3358 | if (!now) |
de7d789a | 3359 | now = 1; |
de7d789a CO |
3360 | if (down) { |
3361 | /* | |
3362 | * String I/O in reverse. Yuck. Kill the guest, fix later. | |
3363 | */ | |
3364 | pr_unimpl(vcpu, "guest string pio down\n"); | |
c1a5d4f9 | 3365 | kvm_inject_gp(vcpu, 0); |
de7d789a CO |
3366 | return 1; |
3367 | } | |
3368 | vcpu->run->io.count = now; | |
ad312c7c | 3369 | vcpu->arch.pio.cur_count = now; |
de7d789a | 3370 | |
ad312c7c | 3371 | if (vcpu->arch.pio.cur_count == vcpu->arch.pio.count) |
de7d789a CO |
3372 | kvm_x86_ops->skip_emulated_instruction(vcpu); |
3373 | ||
0f346074 | 3374 | vcpu->arch.pio.guest_gva = address; |
de7d789a | 3375 | |
ad312c7c | 3376 | if (!vcpu->arch.pio.in) { |
de7d789a CO |
3377 | /* string PIO write */ |
3378 | ret = pio_copy_data(vcpu); | |
0f346074 IE |
3379 | if (ret == X86EMUL_PROPAGATE_FAULT) { |
3380 | kvm_inject_gp(vcpu, 0); | |
3381 | return 1; | |
3382 | } | |
bda9020e | 3383 | if (ret == 0 && !pio_string_write(vcpu)) { |
de7d789a | 3384 | complete_pio(vcpu); |
ad312c7c | 3385 | if (vcpu->arch.pio.count == 0) |
de7d789a CO |
3386 | ret = 1; |
3387 | } | |
bda9020e MT |
3388 | } |
3389 | /* no string PIO read support yet */ | |
de7d789a CO |
3390 | |
3391 | return ret; | |
3392 | } | |
3393 | EXPORT_SYMBOL_GPL(kvm_emulate_pio_string); | |
3394 | ||
c8076604 GH |
3395 | static void bounce_off(void *info) |
3396 | { | |
3397 | /* nothing */ | |
3398 | } | |
3399 | ||
c8076604 GH |
3400 | static int kvmclock_cpufreq_notifier(struct notifier_block *nb, unsigned long val, |
3401 | void *data) | |
3402 | { | |
3403 | struct cpufreq_freqs *freq = data; | |
3404 | struct kvm *kvm; | |
3405 | struct kvm_vcpu *vcpu; | |
3406 | int i, send_ipi = 0; | |
3407 | ||
c8076604 GH |
3408 | if (val == CPUFREQ_PRECHANGE && freq->old > freq->new) |
3409 | return 0; | |
3410 | if (val == CPUFREQ_POSTCHANGE && freq->old < freq->new) | |
3411 | return 0; | |
0cca7907 | 3412 | per_cpu(cpu_tsc_khz, freq->cpu) = freq->new; |
c8076604 GH |
3413 | |
3414 | spin_lock(&kvm_lock); | |
3415 | list_for_each_entry(kvm, &vm_list, vm_list) { | |
988a2cae | 3416 | kvm_for_each_vcpu(i, vcpu, kvm) { |
c8076604 GH |
3417 | if (vcpu->cpu != freq->cpu) |
3418 | continue; | |
3419 | if (!kvm_request_guest_time_update(vcpu)) | |
3420 | continue; | |
3421 | if (vcpu->cpu != smp_processor_id()) | |
3422 | send_ipi++; | |
3423 | } | |
3424 | } | |
3425 | spin_unlock(&kvm_lock); | |
3426 | ||
3427 | if (freq->old < freq->new && send_ipi) { | |
3428 | /* | |
3429 | * We upscale the frequency. Must make the guest | |
3430 | * doesn't see old kvmclock values while running with | |
3431 | * the new frequency, otherwise we risk the guest sees | |
3432 | * time go backwards. | |
3433 | * | |
3434 | * In case we update the frequency for another cpu | |
3435 | * (which might be in guest context) send an interrupt | |
3436 | * to kick the cpu out of guest context. Next time | |
3437 | * guest context is entered kvmclock will be updated, | |
3438 | * so the guest will not see stale values. | |
3439 | */ | |
3440 | smp_call_function_single(freq->cpu, bounce_off, NULL, 1); | |
3441 | } | |
3442 | return 0; | |
3443 | } | |
3444 | ||
3445 | static struct notifier_block kvmclock_cpufreq_notifier_block = { | |
3446 | .notifier_call = kvmclock_cpufreq_notifier | |
3447 | }; | |
3448 | ||
b820cc0c ZA |
3449 | static void kvm_timer_init(void) |
3450 | { | |
3451 | int cpu; | |
3452 | ||
b820cc0c | 3453 | if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) { |
b820cc0c ZA |
3454 | cpufreq_register_notifier(&kvmclock_cpufreq_notifier_block, |
3455 | CPUFREQ_TRANSITION_NOTIFIER); | |
6b7d7e76 ZA |
3456 | for_each_online_cpu(cpu) { |
3457 | unsigned long khz = cpufreq_get(cpu); | |
3458 | if (!khz) | |
3459 | khz = tsc_khz; | |
3460 | per_cpu(cpu_tsc_khz, cpu) = khz; | |
3461 | } | |
0cca7907 ZA |
3462 | } else { |
3463 | for_each_possible_cpu(cpu) | |
3464 | per_cpu(cpu_tsc_khz, cpu) = tsc_khz; | |
b820cc0c ZA |
3465 | } |
3466 | } | |
3467 | ||
f8c16bba | 3468 | int kvm_arch_init(void *opaque) |
043405e1 | 3469 | { |
b820cc0c | 3470 | int r; |
f8c16bba ZX |
3471 | struct kvm_x86_ops *ops = (struct kvm_x86_ops *)opaque; |
3472 | ||
f8c16bba ZX |
3473 | if (kvm_x86_ops) { |
3474 | printk(KERN_ERR "kvm: already loaded the other module\n"); | |
56c6d28a ZX |
3475 | r = -EEXIST; |
3476 | goto out; | |
f8c16bba ZX |
3477 | } |
3478 | ||
3479 | if (!ops->cpu_has_kvm_support()) { | |
3480 | printk(KERN_ERR "kvm: no hardware support\n"); | |
56c6d28a ZX |
3481 | r = -EOPNOTSUPP; |
3482 | goto out; | |
f8c16bba ZX |
3483 | } |
3484 | if (ops->disabled_by_bios()) { | |
3485 | printk(KERN_ERR "kvm: disabled by bios\n"); | |
56c6d28a ZX |
3486 | r = -EOPNOTSUPP; |
3487 | goto out; | |
f8c16bba ZX |
3488 | } |
3489 | ||
97db56ce AK |
3490 | r = kvm_mmu_module_init(); |
3491 | if (r) | |
3492 | goto out; | |
3493 | ||
3494 | kvm_init_msr_list(); | |
3495 | ||
f8c16bba | 3496 | kvm_x86_ops = ops; |
56c6d28a | 3497 | kvm_mmu_set_nonpresent_ptes(0ull, 0ull); |
7b52345e SY |
3498 | kvm_mmu_set_base_ptes(PT_PRESENT_MASK); |
3499 | kvm_mmu_set_mask_ptes(PT_USER_MASK, PT_ACCESSED_MASK, | |
4b12f0de | 3500 | PT_DIRTY_MASK, PT64_NX_MASK, 0); |
c8076604 | 3501 | |
b820cc0c | 3502 | kvm_timer_init(); |
c8076604 | 3503 | |
f8c16bba | 3504 | return 0; |
56c6d28a ZX |
3505 | |
3506 | out: | |
56c6d28a | 3507 | return r; |
043405e1 | 3508 | } |
8776e519 | 3509 | |
f8c16bba ZX |
3510 | void kvm_arch_exit(void) |
3511 | { | |
888d256e JK |
3512 | if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) |
3513 | cpufreq_unregister_notifier(&kvmclock_cpufreq_notifier_block, | |
3514 | CPUFREQ_TRANSITION_NOTIFIER); | |
f8c16bba | 3515 | kvm_x86_ops = NULL; |
56c6d28a ZX |
3516 | kvm_mmu_module_exit(); |
3517 | } | |
f8c16bba | 3518 | |
8776e519 HB |
3519 | int kvm_emulate_halt(struct kvm_vcpu *vcpu) |
3520 | { | |
3521 | ++vcpu->stat.halt_exits; | |
3522 | if (irqchip_in_kernel(vcpu->kvm)) { | |
a4535290 | 3523 | vcpu->arch.mp_state = KVM_MP_STATE_HALTED; |
8776e519 HB |
3524 | return 1; |
3525 | } else { | |
3526 | vcpu->run->exit_reason = KVM_EXIT_HLT; | |
3527 | return 0; | |
3528 | } | |
3529 | } | |
3530 | EXPORT_SYMBOL_GPL(kvm_emulate_halt); | |
3531 | ||
2f333bcb MT |
3532 | static inline gpa_t hc_gpa(struct kvm_vcpu *vcpu, unsigned long a0, |
3533 | unsigned long a1) | |
3534 | { | |
3535 | if (is_long_mode(vcpu)) | |
3536 | return a0; | |
3537 | else | |
3538 | return a0 | ((gpa_t)a1 << 32); | |
3539 | } | |
3540 | ||
8776e519 HB |
3541 | int kvm_emulate_hypercall(struct kvm_vcpu *vcpu) |
3542 | { | |
3543 | unsigned long nr, a0, a1, a2, a3, ret; | |
2f333bcb | 3544 | int r = 1; |
8776e519 | 3545 | |
5fdbf976 MT |
3546 | nr = kvm_register_read(vcpu, VCPU_REGS_RAX); |
3547 | a0 = kvm_register_read(vcpu, VCPU_REGS_RBX); | |
3548 | a1 = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
3549 | a2 = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
3550 | a3 = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
8776e519 | 3551 | |
229456fc | 3552 | trace_kvm_hypercall(nr, a0, a1, a2, a3); |
2714d1d3 | 3553 | |
8776e519 HB |
3554 | if (!is_long_mode(vcpu)) { |
3555 | nr &= 0xFFFFFFFF; | |
3556 | a0 &= 0xFFFFFFFF; | |
3557 | a1 &= 0xFFFFFFFF; | |
3558 | a2 &= 0xFFFFFFFF; | |
3559 | a3 &= 0xFFFFFFFF; | |
3560 | } | |
3561 | ||
07708c4a JK |
3562 | if (kvm_x86_ops->get_cpl(vcpu) != 0) { |
3563 | ret = -KVM_EPERM; | |
3564 | goto out; | |
3565 | } | |
3566 | ||
8776e519 | 3567 | switch (nr) { |
b93463aa AK |
3568 | case KVM_HC_VAPIC_POLL_IRQ: |
3569 | ret = 0; | |
3570 | break; | |
2f333bcb MT |
3571 | case KVM_HC_MMU_OP: |
3572 | r = kvm_pv_mmu_op(vcpu, a0, hc_gpa(vcpu, a1, a2), &ret); | |
3573 | break; | |
8776e519 HB |
3574 | default: |
3575 | ret = -KVM_ENOSYS; | |
3576 | break; | |
3577 | } | |
07708c4a | 3578 | out: |
5fdbf976 | 3579 | kvm_register_write(vcpu, VCPU_REGS_RAX, ret); |
f11c3a8d | 3580 | ++vcpu->stat.hypercalls; |
2f333bcb | 3581 | return r; |
8776e519 HB |
3582 | } |
3583 | EXPORT_SYMBOL_GPL(kvm_emulate_hypercall); | |
3584 | ||
3585 | int kvm_fix_hypercall(struct kvm_vcpu *vcpu) | |
3586 | { | |
3587 | char instruction[3]; | |
3588 | int ret = 0; | |
5fdbf976 | 3589 | unsigned long rip = kvm_rip_read(vcpu); |
8776e519 | 3590 | |
8776e519 HB |
3591 | |
3592 | /* | |
3593 | * Blow out the MMU to ensure that no other VCPU has an active mapping | |
3594 | * to ensure that the updated hypercall appears atomically across all | |
3595 | * VCPUs. | |
3596 | */ | |
3597 | kvm_mmu_zap_all(vcpu->kvm); | |
3598 | ||
8776e519 | 3599 | kvm_x86_ops->patch_hypercall(vcpu, instruction); |
5fdbf976 | 3600 | if (emulator_write_emulated(rip, instruction, 3, vcpu) |
8776e519 HB |
3601 | != X86EMUL_CONTINUE) |
3602 | ret = -EFAULT; | |
3603 | ||
8776e519 HB |
3604 | return ret; |
3605 | } | |
3606 | ||
3607 | static u64 mk_cr_64(u64 curr_cr, u32 new_val) | |
3608 | { | |
3609 | return (curr_cr & ~((1ULL << 32) - 1)) | new_val; | |
3610 | } | |
3611 | ||
3612 | void realmode_lgdt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base) | |
3613 | { | |
3614 | struct descriptor_table dt = { limit, base }; | |
3615 | ||
3616 | kvm_x86_ops->set_gdt(vcpu, &dt); | |
3617 | } | |
3618 | ||
3619 | void realmode_lidt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base) | |
3620 | { | |
3621 | struct descriptor_table dt = { limit, base }; | |
3622 | ||
3623 | kvm_x86_ops->set_idt(vcpu, &dt); | |
3624 | } | |
3625 | ||
3626 | void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw, | |
3627 | unsigned long *rflags) | |
3628 | { | |
2d3ad1f4 | 3629 | kvm_lmsw(vcpu, msw); |
91586a3b | 3630 | *rflags = kvm_get_rflags(vcpu); |
8776e519 HB |
3631 | } |
3632 | ||
3633 | unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr) | |
3634 | { | |
54e445ca JR |
3635 | unsigned long value; |
3636 | ||
8776e519 HB |
3637 | switch (cr) { |
3638 | case 0: | |
54e445ca JR |
3639 | value = vcpu->arch.cr0; |
3640 | break; | |
8776e519 | 3641 | case 2: |
54e445ca JR |
3642 | value = vcpu->arch.cr2; |
3643 | break; | |
8776e519 | 3644 | case 3: |
54e445ca JR |
3645 | value = vcpu->arch.cr3; |
3646 | break; | |
8776e519 | 3647 | case 4: |
fc78f519 | 3648 | value = kvm_read_cr4(vcpu); |
54e445ca | 3649 | break; |
152ff9be | 3650 | case 8: |
54e445ca JR |
3651 | value = kvm_get_cr8(vcpu); |
3652 | break; | |
8776e519 | 3653 | default: |
b8688d51 | 3654 | vcpu_printf(vcpu, "%s: unexpected cr %u\n", __func__, cr); |
8776e519 HB |
3655 | return 0; |
3656 | } | |
54e445ca JR |
3657 | |
3658 | return value; | |
8776e519 HB |
3659 | } |
3660 | ||
3661 | void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long val, | |
3662 | unsigned long *rflags) | |
3663 | { | |
3664 | switch (cr) { | |
3665 | case 0: | |
2d3ad1f4 | 3666 | kvm_set_cr0(vcpu, mk_cr_64(vcpu->arch.cr0, val)); |
91586a3b | 3667 | *rflags = kvm_get_rflags(vcpu); |
8776e519 HB |
3668 | break; |
3669 | case 2: | |
ad312c7c | 3670 | vcpu->arch.cr2 = val; |
8776e519 HB |
3671 | break; |
3672 | case 3: | |
2d3ad1f4 | 3673 | kvm_set_cr3(vcpu, val); |
8776e519 HB |
3674 | break; |
3675 | case 4: | |
fc78f519 | 3676 | kvm_set_cr4(vcpu, mk_cr_64(kvm_read_cr4(vcpu), val)); |
8776e519 | 3677 | break; |
152ff9be | 3678 | case 8: |
2d3ad1f4 | 3679 | kvm_set_cr8(vcpu, val & 0xfUL); |
152ff9be | 3680 | break; |
8776e519 | 3681 | default: |
b8688d51 | 3682 | vcpu_printf(vcpu, "%s: unexpected cr %u\n", __func__, cr); |
8776e519 HB |
3683 | } |
3684 | } | |
3685 | ||
07716717 DK |
3686 | static int move_to_next_stateful_cpuid_entry(struct kvm_vcpu *vcpu, int i) |
3687 | { | |
ad312c7c ZX |
3688 | struct kvm_cpuid_entry2 *e = &vcpu->arch.cpuid_entries[i]; |
3689 | int j, nent = vcpu->arch.cpuid_nent; | |
07716717 DK |
3690 | |
3691 | e->flags &= ~KVM_CPUID_FLAG_STATE_READ_NEXT; | |
3692 | /* when no next entry is found, the current entry[i] is reselected */ | |
0fdf8e59 | 3693 | for (j = i + 1; ; j = (j + 1) % nent) { |
ad312c7c | 3694 | struct kvm_cpuid_entry2 *ej = &vcpu->arch.cpuid_entries[j]; |
07716717 DK |
3695 | if (ej->function == e->function) { |
3696 | ej->flags |= KVM_CPUID_FLAG_STATE_READ_NEXT; | |
3697 | return j; | |
3698 | } | |
3699 | } | |
3700 | return 0; /* silence gcc, even though control never reaches here */ | |
3701 | } | |
3702 | ||
3703 | /* find an entry with matching function, matching index (if needed), and that | |
3704 | * should be read next (if it's stateful) */ | |
3705 | static int is_matching_cpuid_entry(struct kvm_cpuid_entry2 *e, | |
3706 | u32 function, u32 index) | |
3707 | { | |
3708 | if (e->function != function) | |
3709 | return 0; | |
3710 | if ((e->flags & KVM_CPUID_FLAG_SIGNIFCANT_INDEX) && e->index != index) | |
3711 | return 0; | |
3712 | if ((e->flags & KVM_CPUID_FLAG_STATEFUL_FUNC) && | |
19355475 | 3713 | !(e->flags & KVM_CPUID_FLAG_STATE_READ_NEXT)) |
07716717 DK |
3714 | return 0; |
3715 | return 1; | |
3716 | } | |
3717 | ||
d8017474 AG |
3718 | struct kvm_cpuid_entry2 *kvm_find_cpuid_entry(struct kvm_vcpu *vcpu, |
3719 | u32 function, u32 index) | |
8776e519 HB |
3720 | { |
3721 | int i; | |
d8017474 | 3722 | struct kvm_cpuid_entry2 *best = NULL; |
8776e519 | 3723 | |
ad312c7c | 3724 | for (i = 0; i < vcpu->arch.cpuid_nent; ++i) { |
d8017474 AG |
3725 | struct kvm_cpuid_entry2 *e; |
3726 | ||
ad312c7c | 3727 | e = &vcpu->arch.cpuid_entries[i]; |
07716717 DK |
3728 | if (is_matching_cpuid_entry(e, function, index)) { |
3729 | if (e->flags & KVM_CPUID_FLAG_STATEFUL_FUNC) | |
3730 | move_to_next_stateful_cpuid_entry(vcpu, i); | |
8776e519 HB |
3731 | best = e; |
3732 | break; | |
3733 | } | |
3734 | /* | |
3735 | * Both basic or both extended? | |
3736 | */ | |
3737 | if (((e->function ^ function) & 0x80000000) == 0) | |
3738 | if (!best || e->function > best->function) | |
3739 | best = e; | |
3740 | } | |
d8017474 AG |
3741 | return best; |
3742 | } | |
0e851880 | 3743 | EXPORT_SYMBOL_GPL(kvm_find_cpuid_entry); |
d8017474 | 3744 | |
82725b20 DE |
3745 | int cpuid_maxphyaddr(struct kvm_vcpu *vcpu) |
3746 | { | |
3747 | struct kvm_cpuid_entry2 *best; | |
3748 | ||
3749 | best = kvm_find_cpuid_entry(vcpu, 0x80000008, 0); | |
3750 | if (best) | |
3751 | return best->eax & 0xff; | |
3752 | return 36; | |
3753 | } | |
3754 | ||
d8017474 AG |
3755 | void kvm_emulate_cpuid(struct kvm_vcpu *vcpu) |
3756 | { | |
3757 | u32 function, index; | |
3758 | struct kvm_cpuid_entry2 *best; | |
3759 | ||
3760 | function = kvm_register_read(vcpu, VCPU_REGS_RAX); | |
3761 | index = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
3762 | kvm_register_write(vcpu, VCPU_REGS_RAX, 0); | |
3763 | kvm_register_write(vcpu, VCPU_REGS_RBX, 0); | |
3764 | kvm_register_write(vcpu, VCPU_REGS_RCX, 0); | |
3765 | kvm_register_write(vcpu, VCPU_REGS_RDX, 0); | |
3766 | best = kvm_find_cpuid_entry(vcpu, function, index); | |
8776e519 | 3767 | if (best) { |
5fdbf976 MT |
3768 | kvm_register_write(vcpu, VCPU_REGS_RAX, best->eax); |
3769 | kvm_register_write(vcpu, VCPU_REGS_RBX, best->ebx); | |
3770 | kvm_register_write(vcpu, VCPU_REGS_RCX, best->ecx); | |
3771 | kvm_register_write(vcpu, VCPU_REGS_RDX, best->edx); | |
8776e519 | 3772 | } |
8776e519 | 3773 | kvm_x86_ops->skip_emulated_instruction(vcpu); |
229456fc MT |
3774 | trace_kvm_cpuid(function, |
3775 | kvm_register_read(vcpu, VCPU_REGS_RAX), | |
3776 | kvm_register_read(vcpu, VCPU_REGS_RBX), | |
3777 | kvm_register_read(vcpu, VCPU_REGS_RCX), | |
3778 | kvm_register_read(vcpu, VCPU_REGS_RDX)); | |
8776e519 HB |
3779 | } |
3780 | EXPORT_SYMBOL_GPL(kvm_emulate_cpuid); | |
d0752060 | 3781 | |
b6c7a5dc HB |
3782 | /* |
3783 | * Check if userspace requested an interrupt window, and that the | |
3784 | * interrupt window is open. | |
3785 | * | |
3786 | * No need to exit to userspace if we already have an interrupt queued. | |
3787 | */ | |
851ba692 | 3788 | static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu) |
b6c7a5dc | 3789 | { |
8061823a | 3790 | return (!irqchip_in_kernel(vcpu->kvm) && !kvm_cpu_has_interrupt(vcpu) && |
851ba692 | 3791 | vcpu->run->request_interrupt_window && |
5df56646 | 3792 | kvm_arch_interrupt_allowed(vcpu)); |
b6c7a5dc HB |
3793 | } |
3794 | ||
851ba692 | 3795 | static void post_kvm_run_save(struct kvm_vcpu *vcpu) |
b6c7a5dc | 3796 | { |
851ba692 AK |
3797 | struct kvm_run *kvm_run = vcpu->run; |
3798 | ||
91586a3b | 3799 | kvm_run->if_flag = (kvm_get_rflags(vcpu) & X86_EFLAGS_IF) != 0; |
2d3ad1f4 | 3800 | kvm_run->cr8 = kvm_get_cr8(vcpu); |
b6c7a5dc | 3801 | kvm_run->apic_base = kvm_get_apic_base(vcpu); |
4531220b | 3802 | if (irqchip_in_kernel(vcpu->kvm)) |
b6c7a5dc | 3803 | kvm_run->ready_for_interrupt_injection = 1; |
4531220b | 3804 | else |
b6c7a5dc | 3805 | kvm_run->ready_for_interrupt_injection = |
fa9726b0 GN |
3806 | kvm_arch_interrupt_allowed(vcpu) && |
3807 | !kvm_cpu_has_interrupt(vcpu) && | |
3808 | !kvm_event_needs_reinjection(vcpu); | |
b6c7a5dc HB |
3809 | } |
3810 | ||
b93463aa AK |
3811 | static void vapic_enter(struct kvm_vcpu *vcpu) |
3812 | { | |
3813 | struct kvm_lapic *apic = vcpu->arch.apic; | |
3814 | struct page *page; | |
3815 | ||
3816 | if (!apic || !apic->vapic_addr) | |
3817 | return; | |
3818 | ||
3819 | page = gfn_to_page(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT); | |
72dc67a6 IE |
3820 | |
3821 | vcpu->arch.apic->vapic_page = page; | |
b93463aa AK |
3822 | } |
3823 | ||
3824 | static void vapic_exit(struct kvm_vcpu *vcpu) | |
3825 | { | |
3826 | struct kvm_lapic *apic = vcpu->arch.apic; | |
3827 | ||
3828 | if (!apic || !apic->vapic_addr) | |
3829 | return; | |
3830 | ||
f8b78fa3 | 3831 | down_read(&vcpu->kvm->slots_lock); |
b93463aa AK |
3832 | kvm_release_page_dirty(apic->vapic_page); |
3833 | mark_page_dirty(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT); | |
f8b78fa3 | 3834 | up_read(&vcpu->kvm->slots_lock); |
b93463aa AK |
3835 | } |
3836 | ||
95ba8273 GN |
3837 | static void update_cr8_intercept(struct kvm_vcpu *vcpu) |
3838 | { | |
3839 | int max_irr, tpr; | |
3840 | ||
3841 | if (!kvm_x86_ops->update_cr8_intercept) | |
3842 | return; | |
3843 | ||
88c808fd AK |
3844 | if (!vcpu->arch.apic) |
3845 | return; | |
3846 | ||
8db3baa2 GN |
3847 | if (!vcpu->arch.apic->vapic_addr) |
3848 | max_irr = kvm_lapic_find_highest_irr(vcpu); | |
3849 | else | |
3850 | max_irr = -1; | |
95ba8273 GN |
3851 | |
3852 | if (max_irr != -1) | |
3853 | max_irr >>= 4; | |
3854 | ||
3855 | tpr = kvm_lapic_get_cr8(vcpu); | |
3856 | ||
3857 | kvm_x86_ops->update_cr8_intercept(vcpu, tpr, max_irr); | |
3858 | } | |
3859 | ||
851ba692 | 3860 | static void inject_pending_event(struct kvm_vcpu *vcpu) |
95ba8273 GN |
3861 | { |
3862 | /* try to reinject previous events if any */ | |
b59bb7bd GN |
3863 | if (vcpu->arch.exception.pending) { |
3864 | kvm_x86_ops->queue_exception(vcpu, vcpu->arch.exception.nr, | |
3865 | vcpu->arch.exception.has_error_code, | |
3866 | vcpu->arch.exception.error_code); | |
3867 | return; | |
3868 | } | |
3869 | ||
95ba8273 GN |
3870 | if (vcpu->arch.nmi_injected) { |
3871 | kvm_x86_ops->set_nmi(vcpu); | |
3872 | return; | |
3873 | } | |
3874 | ||
3875 | if (vcpu->arch.interrupt.pending) { | |
66fd3f7f | 3876 | kvm_x86_ops->set_irq(vcpu); |
95ba8273 GN |
3877 | return; |
3878 | } | |
3879 | ||
3880 | /* try to inject new event if pending */ | |
3881 | if (vcpu->arch.nmi_pending) { | |
3882 | if (kvm_x86_ops->nmi_allowed(vcpu)) { | |
3883 | vcpu->arch.nmi_pending = false; | |
3884 | vcpu->arch.nmi_injected = true; | |
3885 | kvm_x86_ops->set_nmi(vcpu); | |
3886 | } | |
3887 | } else if (kvm_cpu_has_interrupt(vcpu)) { | |
3888 | if (kvm_x86_ops->interrupt_allowed(vcpu)) { | |
66fd3f7f GN |
3889 | kvm_queue_interrupt(vcpu, kvm_cpu_get_interrupt(vcpu), |
3890 | false); | |
3891 | kvm_x86_ops->set_irq(vcpu); | |
95ba8273 GN |
3892 | } |
3893 | } | |
3894 | } | |
3895 | ||
851ba692 | 3896 | static int vcpu_enter_guest(struct kvm_vcpu *vcpu) |
b6c7a5dc HB |
3897 | { |
3898 | int r; | |
6a8b1d13 | 3899 | bool req_int_win = !irqchip_in_kernel(vcpu->kvm) && |
851ba692 | 3900 | vcpu->run->request_interrupt_window; |
b6c7a5dc | 3901 | |
2e53d63a MT |
3902 | if (vcpu->requests) |
3903 | if (test_and_clear_bit(KVM_REQ_MMU_RELOAD, &vcpu->requests)) | |
3904 | kvm_mmu_unload(vcpu); | |
3905 | ||
b6c7a5dc HB |
3906 | r = kvm_mmu_reload(vcpu); |
3907 | if (unlikely(r)) | |
3908 | goto out; | |
3909 | ||
2f52d58c AK |
3910 | if (vcpu->requests) { |
3911 | if (test_and_clear_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests)) | |
2f599714 | 3912 | __kvm_migrate_timers(vcpu); |
c8076604 GH |
3913 | if (test_and_clear_bit(KVM_REQ_KVMCLOCK_UPDATE, &vcpu->requests)) |
3914 | kvm_write_guest_time(vcpu); | |
4731d4c7 MT |
3915 | if (test_and_clear_bit(KVM_REQ_MMU_SYNC, &vcpu->requests)) |
3916 | kvm_mmu_sync_roots(vcpu); | |
d4acf7e7 MT |
3917 | if (test_and_clear_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests)) |
3918 | kvm_x86_ops->tlb_flush(vcpu); | |
b93463aa AK |
3919 | if (test_and_clear_bit(KVM_REQ_REPORT_TPR_ACCESS, |
3920 | &vcpu->requests)) { | |
851ba692 | 3921 | vcpu->run->exit_reason = KVM_EXIT_TPR_ACCESS; |
b93463aa AK |
3922 | r = 0; |
3923 | goto out; | |
3924 | } | |
71c4dfaf | 3925 | if (test_and_clear_bit(KVM_REQ_TRIPLE_FAULT, &vcpu->requests)) { |
851ba692 | 3926 | vcpu->run->exit_reason = KVM_EXIT_SHUTDOWN; |
71c4dfaf JR |
3927 | r = 0; |
3928 | goto out; | |
3929 | } | |
2f52d58c | 3930 | } |
b93463aa | 3931 | |
b6c7a5dc HB |
3932 | preempt_disable(); |
3933 | ||
3934 | kvm_x86_ops->prepare_guest_switch(vcpu); | |
3935 | kvm_load_guest_fpu(vcpu); | |
3936 | ||
3937 | local_irq_disable(); | |
3938 | ||
32f88400 MT |
3939 | clear_bit(KVM_REQ_KICK, &vcpu->requests); |
3940 | smp_mb__after_clear_bit(); | |
3941 | ||
d7690175 | 3942 | if (vcpu->requests || need_resched() || signal_pending(current)) { |
c7f0f24b | 3943 | set_bit(KVM_REQ_KICK, &vcpu->requests); |
6c142801 AK |
3944 | local_irq_enable(); |
3945 | preempt_enable(); | |
3946 | r = 1; | |
3947 | goto out; | |
3948 | } | |
3949 | ||
851ba692 | 3950 | inject_pending_event(vcpu); |
b6c7a5dc | 3951 | |
6a8b1d13 GN |
3952 | /* enable NMI/IRQ window open exits if needed */ |
3953 | if (vcpu->arch.nmi_pending) | |
3954 | kvm_x86_ops->enable_nmi_window(vcpu); | |
3955 | else if (kvm_cpu_has_interrupt(vcpu) || req_int_win) | |
3956 | kvm_x86_ops->enable_irq_window(vcpu); | |
3957 | ||
95ba8273 | 3958 | if (kvm_lapic_enabled(vcpu)) { |
8db3baa2 GN |
3959 | update_cr8_intercept(vcpu); |
3960 | kvm_lapic_sync_to_vapic(vcpu); | |
95ba8273 | 3961 | } |
b93463aa | 3962 | |
3200f405 MT |
3963 | up_read(&vcpu->kvm->slots_lock); |
3964 | ||
b6c7a5dc HB |
3965 | kvm_guest_enter(); |
3966 | ||
42dbaa5a | 3967 | if (unlikely(vcpu->arch.switch_db_regs)) { |
42dbaa5a JK |
3968 | set_debugreg(0, 7); |
3969 | set_debugreg(vcpu->arch.eff_db[0], 0); | |
3970 | set_debugreg(vcpu->arch.eff_db[1], 1); | |
3971 | set_debugreg(vcpu->arch.eff_db[2], 2); | |
3972 | set_debugreg(vcpu->arch.eff_db[3], 3); | |
3973 | } | |
b6c7a5dc | 3974 | |
229456fc | 3975 | trace_kvm_entry(vcpu->vcpu_id); |
851ba692 | 3976 | kvm_x86_ops->run(vcpu); |
b6c7a5dc | 3977 | |
24f1e32c FW |
3978 | /* |
3979 | * If the guest has used debug registers, at least dr7 | |
3980 | * will be disabled while returning to the host. | |
3981 | * If we don't have active breakpoints in the host, we don't | |
3982 | * care about the messed up debug address registers. But if | |
3983 | * we have some of them active, restore the old state. | |
3984 | */ | |
59d8eb53 | 3985 | if (hw_breakpoint_active()) |
24f1e32c | 3986 | hw_breakpoint_restore(); |
42dbaa5a | 3987 | |
32f88400 | 3988 | set_bit(KVM_REQ_KICK, &vcpu->requests); |
b6c7a5dc HB |
3989 | local_irq_enable(); |
3990 | ||
3991 | ++vcpu->stat.exits; | |
3992 | ||
3993 | /* | |
3994 | * We must have an instruction between local_irq_enable() and | |
3995 | * kvm_guest_exit(), so the timer interrupt isn't delayed by | |
3996 | * the interrupt shadow. The stat.exits increment will do nicely. | |
3997 | * But we need to prevent reordering, hence this barrier(): | |
3998 | */ | |
3999 | barrier(); | |
4000 | ||
4001 | kvm_guest_exit(); | |
4002 | ||
4003 | preempt_enable(); | |
4004 | ||
3200f405 MT |
4005 | down_read(&vcpu->kvm->slots_lock); |
4006 | ||
b6c7a5dc HB |
4007 | /* |
4008 | * Profile KVM exit RIPs: | |
4009 | */ | |
4010 | if (unlikely(prof_on == KVM_PROFILING)) { | |
5fdbf976 MT |
4011 | unsigned long rip = kvm_rip_read(vcpu); |
4012 | profile_hit(KVM_PROFILING, (void *)rip); | |
b6c7a5dc HB |
4013 | } |
4014 | ||
298101da | 4015 | |
b93463aa AK |
4016 | kvm_lapic_sync_from_vapic(vcpu); |
4017 | ||
851ba692 | 4018 | r = kvm_x86_ops->handle_exit(vcpu); |
d7690175 MT |
4019 | out: |
4020 | return r; | |
4021 | } | |
b6c7a5dc | 4022 | |
09cec754 | 4023 | |
851ba692 | 4024 | static int __vcpu_run(struct kvm_vcpu *vcpu) |
d7690175 MT |
4025 | { |
4026 | int r; | |
4027 | ||
4028 | if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_SIPI_RECEIVED)) { | |
1b10bf31 JK |
4029 | pr_debug("vcpu %d received sipi with vector # %x\n", |
4030 | vcpu->vcpu_id, vcpu->arch.sipi_vector); | |
d7690175 | 4031 | kvm_lapic_reset(vcpu); |
5f179287 | 4032 | r = kvm_arch_vcpu_reset(vcpu); |
d7690175 MT |
4033 | if (r) |
4034 | return r; | |
4035 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; | |
b6c7a5dc HB |
4036 | } |
4037 | ||
d7690175 MT |
4038 | down_read(&vcpu->kvm->slots_lock); |
4039 | vapic_enter(vcpu); | |
4040 | ||
4041 | r = 1; | |
4042 | while (r > 0) { | |
af2152f5 | 4043 | if (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE) |
851ba692 | 4044 | r = vcpu_enter_guest(vcpu); |
d7690175 MT |
4045 | else { |
4046 | up_read(&vcpu->kvm->slots_lock); | |
4047 | kvm_vcpu_block(vcpu); | |
4048 | down_read(&vcpu->kvm->slots_lock); | |
4049 | if (test_and_clear_bit(KVM_REQ_UNHALT, &vcpu->requests)) | |
09cec754 GN |
4050 | { |
4051 | switch(vcpu->arch.mp_state) { | |
4052 | case KVM_MP_STATE_HALTED: | |
d7690175 | 4053 | vcpu->arch.mp_state = |
09cec754 GN |
4054 | KVM_MP_STATE_RUNNABLE; |
4055 | case KVM_MP_STATE_RUNNABLE: | |
4056 | break; | |
4057 | case KVM_MP_STATE_SIPI_RECEIVED: | |
4058 | default: | |
4059 | r = -EINTR; | |
4060 | break; | |
4061 | } | |
4062 | } | |
d7690175 MT |
4063 | } |
4064 | ||
09cec754 GN |
4065 | if (r <= 0) |
4066 | break; | |
4067 | ||
4068 | clear_bit(KVM_REQ_PENDING_TIMER, &vcpu->requests); | |
4069 | if (kvm_cpu_has_pending_timer(vcpu)) | |
4070 | kvm_inject_pending_timer_irqs(vcpu); | |
4071 | ||
851ba692 | 4072 | if (dm_request_for_irq_injection(vcpu)) { |
09cec754 | 4073 | r = -EINTR; |
851ba692 | 4074 | vcpu->run->exit_reason = KVM_EXIT_INTR; |
09cec754 GN |
4075 | ++vcpu->stat.request_irq_exits; |
4076 | } | |
4077 | if (signal_pending(current)) { | |
4078 | r = -EINTR; | |
851ba692 | 4079 | vcpu->run->exit_reason = KVM_EXIT_INTR; |
09cec754 GN |
4080 | ++vcpu->stat.signal_exits; |
4081 | } | |
4082 | if (need_resched()) { | |
4083 | up_read(&vcpu->kvm->slots_lock); | |
4084 | kvm_resched(vcpu); | |
4085 | down_read(&vcpu->kvm->slots_lock); | |
d7690175 | 4086 | } |
b6c7a5dc HB |
4087 | } |
4088 | ||
d7690175 | 4089 | up_read(&vcpu->kvm->slots_lock); |
851ba692 | 4090 | post_kvm_run_save(vcpu); |
b6c7a5dc | 4091 | |
b93463aa AK |
4092 | vapic_exit(vcpu); |
4093 | ||
b6c7a5dc HB |
4094 | return r; |
4095 | } | |
4096 | ||
4097 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
4098 | { | |
4099 | int r; | |
4100 | sigset_t sigsaved; | |
4101 | ||
4102 | vcpu_load(vcpu); | |
4103 | ||
ac9f6dc0 AK |
4104 | if (vcpu->sigset_active) |
4105 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
4106 | ||
a4535290 | 4107 | if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)) { |
b6c7a5dc | 4108 | kvm_vcpu_block(vcpu); |
d7690175 | 4109 | clear_bit(KVM_REQ_UNHALT, &vcpu->requests); |
ac9f6dc0 AK |
4110 | r = -EAGAIN; |
4111 | goto out; | |
b6c7a5dc HB |
4112 | } |
4113 | ||
b6c7a5dc HB |
4114 | /* re-sync apic's tpr */ |
4115 | if (!irqchip_in_kernel(vcpu->kvm)) | |
2d3ad1f4 | 4116 | kvm_set_cr8(vcpu, kvm_run->cr8); |
b6c7a5dc | 4117 | |
ad312c7c | 4118 | if (vcpu->arch.pio.cur_count) { |
b6c7a5dc HB |
4119 | r = complete_pio(vcpu); |
4120 | if (r) | |
4121 | goto out; | |
4122 | } | |
b6c7a5dc HB |
4123 | if (vcpu->mmio_needed) { |
4124 | memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8); | |
4125 | vcpu->mmio_read_completed = 1; | |
4126 | vcpu->mmio_needed = 0; | |
3200f405 MT |
4127 | |
4128 | down_read(&vcpu->kvm->slots_lock); | |
851ba692 | 4129 | r = emulate_instruction(vcpu, vcpu->arch.mmio_fault_cr2, 0, |
571008da | 4130 | EMULTYPE_NO_DECODE); |
3200f405 | 4131 | up_read(&vcpu->kvm->slots_lock); |
b6c7a5dc HB |
4132 | if (r == EMULATE_DO_MMIO) { |
4133 | /* | |
4134 | * Read-modify-write. Back to userspace. | |
4135 | */ | |
4136 | r = 0; | |
4137 | goto out; | |
4138 | } | |
4139 | } | |
5fdbf976 MT |
4140 | if (kvm_run->exit_reason == KVM_EXIT_HYPERCALL) |
4141 | kvm_register_write(vcpu, VCPU_REGS_RAX, | |
4142 | kvm_run->hypercall.ret); | |
b6c7a5dc | 4143 | |
851ba692 | 4144 | r = __vcpu_run(vcpu); |
b6c7a5dc HB |
4145 | |
4146 | out: | |
4147 | if (vcpu->sigset_active) | |
4148 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
4149 | ||
4150 | vcpu_put(vcpu); | |
4151 | return r; | |
4152 | } | |
4153 | ||
4154 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
4155 | { | |
4156 | vcpu_load(vcpu); | |
4157 | ||
5fdbf976 MT |
4158 | regs->rax = kvm_register_read(vcpu, VCPU_REGS_RAX); |
4159 | regs->rbx = kvm_register_read(vcpu, VCPU_REGS_RBX); | |
4160 | regs->rcx = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
4161 | regs->rdx = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
4162 | regs->rsi = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
4163 | regs->rdi = kvm_register_read(vcpu, VCPU_REGS_RDI); | |
4164 | regs->rsp = kvm_register_read(vcpu, VCPU_REGS_RSP); | |
4165 | regs->rbp = kvm_register_read(vcpu, VCPU_REGS_RBP); | |
b6c7a5dc | 4166 | #ifdef CONFIG_X86_64 |
5fdbf976 MT |
4167 | regs->r8 = kvm_register_read(vcpu, VCPU_REGS_R8); |
4168 | regs->r9 = kvm_register_read(vcpu, VCPU_REGS_R9); | |
4169 | regs->r10 = kvm_register_read(vcpu, VCPU_REGS_R10); | |
4170 | regs->r11 = kvm_register_read(vcpu, VCPU_REGS_R11); | |
4171 | regs->r12 = kvm_register_read(vcpu, VCPU_REGS_R12); | |
4172 | regs->r13 = kvm_register_read(vcpu, VCPU_REGS_R13); | |
4173 | regs->r14 = kvm_register_read(vcpu, VCPU_REGS_R14); | |
4174 | regs->r15 = kvm_register_read(vcpu, VCPU_REGS_R15); | |
b6c7a5dc HB |
4175 | #endif |
4176 | ||
5fdbf976 | 4177 | regs->rip = kvm_rip_read(vcpu); |
91586a3b | 4178 | regs->rflags = kvm_get_rflags(vcpu); |
b6c7a5dc HB |
4179 | |
4180 | vcpu_put(vcpu); | |
4181 | ||
4182 | return 0; | |
4183 | } | |
4184 | ||
4185 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
4186 | { | |
4187 | vcpu_load(vcpu); | |
4188 | ||
5fdbf976 MT |
4189 | kvm_register_write(vcpu, VCPU_REGS_RAX, regs->rax); |
4190 | kvm_register_write(vcpu, VCPU_REGS_RBX, regs->rbx); | |
4191 | kvm_register_write(vcpu, VCPU_REGS_RCX, regs->rcx); | |
4192 | kvm_register_write(vcpu, VCPU_REGS_RDX, regs->rdx); | |
4193 | kvm_register_write(vcpu, VCPU_REGS_RSI, regs->rsi); | |
4194 | kvm_register_write(vcpu, VCPU_REGS_RDI, regs->rdi); | |
4195 | kvm_register_write(vcpu, VCPU_REGS_RSP, regs->rsp); | |
4196 | kvm_register_write(vcpu, VCPU_REGS_RBP, regs->rbp); | |
b6c7a5dc | 4197 | #ifdef CONFIG_X86_64 |
5fdbf976 MT |
4198 | kvm_register_write(vcpu, VCPU_REGS_R8, regs->r8); |
4199 | kvm_register_write(vcpu, VCPU_REGS_R9, regs->r9); | |
4200 | kvm_register_write(vcpu, VCPU_REGS_R10, regs->r10); | |
4201 | kvm_register_write(vcpu, VCPU_REGS_R11, regs->r11); | |
4202 | kvm_register_write(vcpu, VCPU_REGS_R12, regs->r12); | |
4203 | kvm_register_write(vcpu, VCPU_REGS_R13, regs->r13); | |
4204 | kvm_register_write(vcpu, VCPU_REGS_R14, regs->r14); | |
4205 | kvm_register_write(vcpu, VCPU_REGS_R15, regs->r15); | |
b6c7a5dc HB |
4206 | #endif |
4207 | ||
5fdbf976 | 4208 | kvm_rip_write(vcpu, regs->rip); |
91586a3b | 4209 | kvm_set_rflags(vcpu, regs->rflags); |
b6c7a5dc | 4210 | |
b4f14abd JK |
4211 | vcpu->arch.exception.pending = false; |
4212 | ||
b6c7a5dc HB |
4213 | vcpu_put(vcpu); |
4214 | ||
4215 | return 0; | |
4216 | } | |
4217 | ||
3e6e0aab GT |
4218 | void kvm_get_segment(struct kvm_vcpu *vcpu, |
4219 | struct kvm_segment *var, int seg) | |
b6c7a5dc | 4220 | { |
14af3f3c | 4221 | kvm_x86_ops->get_segment(vcpu, var, seg); |
b6c7a5dc HB |
4222 | } |
4223 | ||
4224 | void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l) | |
4225 | { | |
4226 | struct kvm_segment cs; | |
4227 | ||
3e6e0aab | 4228 | kvm_get_segment(vcpu, &cs, VCPU_SREG_CS); |
b6c7a5dc HB |
4229 | *db = cs.db; |
4230 | *l = cs.l; | |
4231 | } | |
4232 | EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits); | |
4233 | ||
4234 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, | |
4235 | struct kvm_sregs *sregs) | |
4236 | { | |
4237 | struct descriptor_table dt; | |
b6c7a5dc HB |
4238 | |
4239 | vcpu_load(vcpu); | |
4240 | ||
3e6e0aab GT |
4241 | kvm_get_segment(vcpu, &sregs->cs, VCPU_SREG_CS); |
4242 | kvm_get_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
4243 | kvm_get_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
4244 | kvm_get_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
4245 | kvm_get_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
4246 | kvm_get_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
b6c7a5dc | 4247 | |
3e6e0aab GT |
4248 | kvm_get_segment(vcpu, &sregs->tr, VCPU_SREG_TR); |
4249 | kvm_get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
b6c7a5dc HB |
4250 | |
4251 | kvm_x86_ops->get_idt(vcpu, &dt); | |
4252 | sregs->idt.limit = dt.limit; | |
4253 | sregs->idt.base = dt.base; | |
4254 | kvm_x86_ops->get_gdt(vcpu, &dt); | |
4255 | sregs->gdt.limit = dt.limit; | |
4256 | sregs->gdt.base = dt.base; | |
4257 | ||
ad312c7c ZX |
4258 | sregs->cr0 = vcpu->arch.cr0; |
4259 | sregs->cr2 = vcpu->arch.cr2; | |
4260 | sregs->cr3 = vcpu->arch.cr3; | |
fc78f519 | 4261 | sregs->cr4 = kvm_read_cr4(vcpu); |
2d3ad1f4 | 4262 | sregs->cr8 = kvm_get_cr8(vcpu); |
ad312c7c | 4263 | sregs->efer = vcpu->arch.shadow_efer; |
b6c7a5dc HB |
4264 | sregs->apic_base = kvm_get_apic_base(vcpu); |
4265 | ||
923c61bb | 4266 | memset(sregs->interrupt_bitmap, 0, sizeof sregs->interrupt_bitmap); |
b6c7a5dc | 4267 | |
36752c9b | 4268 | if (vcpu->arch.interrupt.pending && !vcpu->arch.interrupt.soft) |
14d0bc1f GN |
4269 | set_bit(vcpu->arch.interrupt.nr, |
4270 | (unsigned long *)sregs->interrupt_bitmap); | |
16d7a191 | 4271 | |
b6c7a5dc HB |
4272 | vcpu_put(vcpu); |
4273 | ||
4274 | return 0; | |
4275 | } | |
4276 | ||
62d9f0db MT |
4277 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
4278 | struct kvm_mp_state *mp_state) | |
4279 | { | |
4280 | vcpu_load(vcpu); | |
4281 | mp_state->mp_state = vcpu->arch.mp_state; | |
4282 | vcpu_put(vcpu); | |
4283 | return 0; | |
4284 | } | |
4285 | ||
4286 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
4287 | struct kvm_mp_state *mp_state) | |
4288 | { | |
4289 | vcpu_load(vcpu); | |
4290 | vcpu->arch.mp_state = mp_state->mp_state; | |
4291 | vcpu_put(vcpu); | |
4292 | return 0; | |
4293 | } | |
4294 | ||
3e6e0aab | 4295 | static void kvm_set_segment(struct kvm_vcpu *vcpu, |
b6c7a5dc HB |
4296 | struct kvm_segment *var, int seg) |
4297 | { | |
14af3f3c | 4298 | kvm_x86_ops->set_segment(vcpu, var, seg); |
b6c7a5dc HB |
4299 | } |
4300 | ||
37817f29 IE |
4301 | static void seg_desct_to_kvm_desct(struct desc_struct *seg_desc, u16 selector, |
4302 | struct kvm_segment *kvm_desct) | |
4303 | { | |
46a359e7 AM |
4304 | kvm_desct->base = get_desc_base(seg_desc); |
4305 | kvm_desct->limit = get_desc_limit(seg_desc); | |
c93cd3a5 MT |
4306 | if (seg_desc->g) { |
4307 | kvm_desct->limit <<= 12; | |
4308 | kvm_desct->limit |= 0xfff; | |
4309 | } | |
37817f29 IE |
4310 | kvm_desct->selector = selector; |
4311 | kvm_desct->type = seg_desc->type; | |
4312 | kvm_desct->present = seg_desc->p; | |
4313 | kvm_desct->dpl = seg_desc->dpl; | |
4314 | kvm_desct->db = seg_desc->d; | |
4315 | kvm_desct->s = seg_desc->s; | |
4316 | kvm_desct->l = seg_desc->l; | |
4317 | kvm_desct->g = seg_desc->g; | |
4318 | kvm_desct->avl = seg_desc->avl; | |
4319 | if (!selector) | |
4320 | kvm_desct->unusable = 1; | |
4321 | else | |
4322 | kvm_desct->unusable = 0; | |
4323 | kvm_desct->padding = 0; | |
4324 | } | |
4325 | ||
b8222ad2 AS |
4326 | static void get_segment_descriptor_dtable(struct kvm_vcpu *vcpu, |
4327 | u16 selector, | |
4328 | struct descriptor_table *dtable) | |
37817f29 IE |
4329 | { |
4330 | if (selector & 1 << 2) { | |
4331 | struct kvm_segment kvm_seg; | |
4332 | ||
3e6e0aab | 4333 | kvm_get_segment(vcpu, &kvm_seg, VCPU_SREG_LDTR); |
37817f29 IE |
4334 | |
4335 | if (kvm_seg.unusable) | |
4336 | dtable->limit = 0; | |
4337 | else | |
4338 | dtable->limit = kvm_seg.limit; | |
4339 | dtable->base = kvm_seg.base; | |
4340 | } | |
4341 | else | |
4342 | kvm_x86_ops->get_gdt(vcpu, dtable); | |
4343 | } | |
4344 | ||
4345 | /* allowed just for 8 bytes segments */ | |
4346 | static int load_guest_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector, | |
4347 | struct desc_struct *seg_desc) | |
4348 | { | |
4349 | struct descriptor_table dtable; | |
4350 | u16 index = selector >> 3; | |
4351 | ||
b8222ad2 | 4352 | get_segment_descriptor_dtable(vcpu, selector, &dtable); |
37817f29 IE |
4353 | |
4354 | if (dtable.limit < index * 8 + 7) { | |
4355 | kvm_queue_exception_e(vcpu, GP_VECTOR, selector & 0xfffc); | |
4356 | return 1; | |
4357 | } | |
d9048d32 | 4358 | return kvm_read_guest_virt(dtable.base + index*8, seg_desc, sizeof(*seg_desc), vcpu); |
37817f29 IE |
4359 | } |
4360 | ||
4361 | /* allowed just for 8 bytes segments */ | |
4362 | static int save_guest_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector, | |
4363 | struct desc_struct *seg_desc) | |
4364 | { | |
4365 | struct descriptor_table dtable; | |
4366 | u16 index = selector >> 3; | |
4367 | ||
b8222ad2 | 4368 | get_segment_descriptor_dtable(vcpu, selector, &dtable); |
37817f29 IE |
4369 | |
4370 | if (dtable.limit < index * 8 + 7) | |
4371 | return 1; | |
d9048d32 | 4372 | return kvm_write_guest_virt(dtable.base + index*8, seg_desc, sizeof(*seg_desc), vcpu); |
37817f29 IE |
4373 | } |
4374 | ||
abb39119 | 4375 | static gpa_t get_tss_base_addr(struct kvm_vcpu *vcpu, |
37817f29 IE |
4376 | struct desc_struct *seg_desc) |
4377 | { | |
46a359e7 | 4378 | u32 base_addr = get_desc_base(seg_desc); |
37817f29 | 4379 | |
98899aa0 | 4380 | return vcpu->arch.mmu.gva_to_gpa(vcpu, base_addr); |
37817f29 IE |
4381 | } |
4382 | ||
37817f29 IE |
4383 | static u16 get_segment_selector(struct kvm_vcpu *vcpu, int seg) |
4384 | { | |
4385 | struct kvm_segment kvm_seg; | |
4386 | ||
3e6e0aab | 4387 | kvm_get_segment(vcpu, &kvm_seg, seg); |
37817f29 IE |
4388 | return kvm_seg.selector; |
4389 | } | |
4390 | ||
4391 | static int load_segment_descriptor_to_kvm_desct(struct kvm_vcpu *vcpu, | |
4392 | u16 selector, | |
4393 | struct kvm_segment *kvm_seg) | |
4394 | { | |
4395 | struct desc_struct seg_desc; | |
4396 | ||
4397 | if (load_guest_segment_descriptor(vcpu, selector, &seg_desc)) | |
4398 | return 1; | |
4399 | seg_desct_to_kvm_desct(&seg_desc, selector, kvm_seg); | |
4400 | return 0; | |
4401 | } | |
4402 | ||
2259e3a7 | 4403 | static int kvm_load_realmode_segment(struct kvm_vcpu *vcpu, u16 selector, int seg) |
f4bbd9aa AK |
4404 | { |
4405 | struct kvm_segment segvar = { | |
4406 | .base = selector << 4, | |
4407 | .limit = 0xffff, | |
4408 | .selector = selector, | |
4409 | .type = 3, | |
4410 | .present = 1, | |
4411 | .dpl = 3, | |
4412 | .db = 0, | |
4413 | .s = 1, | |
4414 | .l = 0, | |
4415 | .g = 0, | |
4416 | .avl = 0, | |
4417 | .unusable = 0, | |
4418 | }; | |
4419 | kvm_x86_ops->set_segment(vcpu, &segvar, seg); | |
4420 | return 0; | |
4421 | } | |
4422 | ||
c0c7c04b AL |
4423 | static int is_vm86_segment(struct kvm_vcpu *vcpu, int seg) |
4424 | { | |
4425 | return (seg != VCPU_SREG_LDTR) && | |
4426 | (seg != VCPU_SREG_TR) && | |
91586a3b | 4427 | (kvm_get_rflags(vcpu) & X86_EFLAGS_VM); |
c0c7c04b AL |
4428 | } |
4429 | ||
cb84b55f MT |
4430 | static void kvm_check_segment_descriptor(struct kvm_vcpu *vcpu, int seg, |
4431 | u16 selector) | |
4432 | { | |
4433 | /* NULL selector is not valid for CS and SS */ | |
4434 | if (seg == VCPU_SREG_CS || seg == VCPU_SREG_SS) | |
4435 | if (!selector) | |
4436 | kvm_queue_exception_e(vcpu, TS_VECTOR, selector >> 3); | |
4437 | } | |
4438 | ||
3e6e0aab GT |
4439 | int kvm_load_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector, |
4440 | int type_bits, int seg) | |
37817f29 IE |
4441 | { |
4442 | struct kvm_segment kvm_seg; | |
4443 | ||
c0c7c04b | 4444 | if (is_vm86_segment(vcpu, seg) || !(vcpu->arch.cr0 & X86_CR0_PE)) |
f4bbd9aa | 4445 | return kvm_load_realmode_segment(vcpu, selector, seg); |
37817f29 IE |
4446 | if (load_segment_descriptor_to_kvm_desct(vcpu, selector, &kvm_seg)) |
4447 | return 1; | |
cb84b55f MT |
4448 | |
4449 | kvm_check_segment_descriptor(vcpu, seg, selector); | |
37817f29 IE |
4450 | kvm_seg.type |= type_bits; |
4451 | ||
4452 | if (seg != VCPU_SREG_SS && seg != VCPU_SREG_CS && | |
4453 | seg != VCPU_SREG_LDTR) | |
4454 | if (!kvm_seg.s) | |
4455 | kvm_seg.unusable = 1; | |
4456 | ||
3e6e0aab | 4457 | kvm_set_segment(vcpu, &kvm_seg, seg); |
37817f29 IE |
4458 | return 0; |
4459 | } | |
4460 | ||
4461 | static void save_state_to_tss32(struct kvm_vcpu *vcpu, | |
4462 | struct tss_segment_32 *tss) | |
4463 | { | |
4464 | tss->cr3 = vcpu->arch.cr3; | |
5fdbf976 | 4465 | tss->eip = kvm_rip_read(vcpu); |
91586a3b | 4466 | tss->eflags = kvm_get_rflags(vcpu); |
5fdbf976 MT |
4467 | tss->eax = kvm_register_read(vcpu, VCPU_REGS_RAX); |
4468 | tss->ecx = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
4469 | tss->edx = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
4470 | tss->ebx = kvm_register_read(vcpu, VCPU_REGS_RBX); | |
4471 | tss->esp = kvm_register_read(vcpu, VCPU_REGS_RSP); | |
4472 | tss->ebp = kvm_register_read(vcpu, VCPU_REGS_RBP); | |
4473 | tss->esi = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
4474 | tss->edi = kvm_register_read(vcpu, VCPU_REGS_RDI); | |
37817f29 IE |
4475 | tss->es = get_segment_selector(vcpu, VCPU_SREG_ES); |
4476 | tss->cs = get_segment_selector(vcpu, VCPU_SREG_CS); | |
4477 | tss->ss = get_segment_selector(vcpu, VCPU_SREG_SS); | |
4478 | tss->ds = get_segment_selector(vcpu, VCPU_SREG_DS); | |
4479 | tss->fs = get_segment_selector(vcpu, VCPU_SREG_FS); | |
4480 | tss->gs = get_segment_selector(vcpu, VCPU_SREG_GS); | |
4481 | tss->ldt_selector = get_segment_selector(vcpu, VCPU_SREG_LDTR); | |
37817f29 IE |
4482 | } |
4483 | ||
4484 | static int load_state_from_tss32(struct kvm_vcpu *vcpu, | |
4485 | struct tss_segment_32 *tss) | |
4486 | { | |
4487 | kvm_set_cr3(vcpu, tss->cr3); | |
4488 | ||
5fdbf976 | 4489 | kvm_rip_write(vcpu, tss->eip); |
91586a3b | 4490 | kvm_set_rflags(vcpu, tss->eflags | 2); |
37817f29 | 4491 | |
5fdbf976 MT |
4492 | kvm_register_write(vcpu, VCPU_REGS_RAX, tss->eax); |
4493 | kvm_register_write(vcpu, VCPU_REGS_RCX, tss->ecx); | |
4494 | kvm_register_write(vcpu, VCPU_REGS_RDX, tss->edx); | |
4495 | kvm_register_write(vcpu, VCPU_REGS_RBX, tss->ebx); | |
4496 | kvm_register_write(vcpu, VCPU_REGS_RSP, tss->esp); | |
4497 | kvm_register_write(vcpu, VCPU_REGS_RBP, tss->ebp); | |
4498 | kvm_register_write(vcpu, VCPU_REGS_RSI, tss->esi); | |
4499 | kvm_register_write(vcpu, VCPU_REGS_RDI, tss->edi); | |
37817f29 | 4500 | |
3e6e0aab | 4501 | if (kvm_load_segment_descriptor(vcpu, tss->ldt_selector, 0, VCPU_SREG_LDTR)) |
37817f29 IE |
4502 | return 1; |
4503 | ||
3e6e0aab | 4504 | if (kvm_load_segment_descriptor(vcpu, tss->es, 1, VCPU_SREG_ES)) |
37817f29 IE |
4505 | return 1; |
4506 | ||
3e6e0aab | 4507 | if (kvm_load_segment_descriptor(vcpu, tss->cs, 9, VCPU_SREG_CS)) |
37817f29 IE |
4508 | return 1; |
4509 | ||
3e6e0aab | 4510 | if (kvm_load_segment_descriptor(vcpu, tss->ss, 1, VCPU_SREG_SS)) |
37817f29 IE |
4511 | return 1; |
4512 | ||
3e6e0aab | 4513 | if (kvm_load_segment_descriptor(vcpu, tss->ds, 1, VCPU_SREG_DS)) |
37817f29 IE |
4514 | return 1; |
4515 | ||
3e6e0aab | 4516 | if (kvm_load_segment_descriptor(vcpu, tss->fs, 1, VCPU_SREG_FS)) |
37817f29 IE |
4517 | return 1; |
4518 | ||
3e6e0aab | 4519 | if (kvm_load_segment_descriptor(vcpu, tss->gs, 1, VCPU_SREG_GS)) |
37817f29 IE |
4520 | return 1; |
4521 | return 0; | |
4522 | } | |
4523 | ||
4524 | static void save_state_to_tss16(struct kvm_vcpu *vcpu, | |
4525 | struct tss_segment_16 *tss) | |
4526 | { | |
5fdbf976 | 4527 | tss->ip = kvm_rip_read(vcpu); |
91586a3b | 4528 | tss->flag = kvm_get_rflags(vcpu); |
5fdbf976 MT |
4529 | tss->ax = kvm_register_read(vcpu, VCPU_REGS_RAX); |
4530 | tss->cx = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
4531 | tss->dx = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
4532 | tss->bx = kvm_register_read(vcpu, VCPU_REGS_RBX); | |
4533 | tss->sp = kvm_register_read(vcpu, VCPU_REGS_RSP); | |
4534 | tss->bp = kvm_register_read(vcpu, VCPU_REGS_RBP); | |
4535 | tss->si = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
4536 | tss->di = kvm_register_read(vcpu, VCPU_REGS_RDI); | |
37817f29 IE |
4537 | |
4538 | tss->es = get_segment_selector(vcpu, VCPU_SREG_ES); | |
4539 | tss->cs = get_segment_selector(vcpu, VCPU_SREG_CS); | |
4540 | tss->ss = get_segment_selector(vcpu, VCPU_SREG_SS); | |
4541 | tss->ds = get_segment_selector(vcpu, VCPU_SREG_DS); | |
4542 | tss->ldt = get_segment_selector(vcpu, VCPU_SREG_LDTR); | |
37817f29 IE |
4543 | } |
4544 | ||
4545 | static int load_state_from_tss16(struct kvm_vcpu *vcpu, | |
4546 | struct tss_segment_16 *tss) | |
4547 | { | |
5fdbf976 | 4548 | kvm_rip_write(vcpu, tss->ip); |
91586a3b | 4549 | kvm_set_rflags(vcpu, tss->flag | 2); |
5fdbf976 MT |
4550 | kvm_register_write(vcpu, VCPU_REGS_RAX, tss->ax); |
4551 | kvm_register_write(vcpu, VCPU_REGS_RCX, tss->cx); | |
4552 | kvm_register_write(vcpu, VCPU_REGS_RDX, tss->dx); | |
4553 | kvm_register_write(vcpu, VCPU_REGS_RBX, tss->bx); | |
4554 | kvm_register_write(vcpu, VCPU_REGS_RSP, tss->sp); | |
4555 | kvm_register_write(vcpu, VCPU_REGS_RBP, tss->bp); | |
4556 | kvm_register_write(vcpu, VCPU_REGS_RSI, tss->si); | |
4557 | kvm_register_write(vcpu, VCPU_REGS_RDI, tss->di); | |
37817f29 | 4558 | |
3e6e0aab | 4559 | if (kvm_load_segment_descriptor(vcpu, tss->ldt, 0, VCPU_SREG_LDTR)) |
37817f29 IE |
4560 | return 1; |
4561 | ||
3e6e0aab | 4562 | if (kvm_load_segment_descriptor(vcpu, tss->es, 1, VCPU_SREG_ES)) |
37817f29 IE |
4563 | return 1; |
4564 | ||
3e6e0aab | 4565 | if (kvm_load_segment_descriptor(vcpu, tss->cs, 9, VCPU_SREG_CS)) |
37817f29 IE |
4566 | return 1; |
4567 | ||
3e6e0aab | 4568 | if (kvm_load_segment_descriptor(vcpu, tss->ss, 1, VCPU_SREG_SS)) |
37817f29 IE |
4569 | return 1; |
4570 | ||
3e6e0aab | 4571 | if (kvm_load_segment_descriptor(vcpu, tss->ds, 1, VCPU_SREG_DS)) |
37817f29 IE |
4572 | return 1; |
4573 | return 0; | |
4574 | } | |
4575 | ||
8b2cf73c | 4576 | static int kvm_task_switch_16(struct kvm_vcpu *vcpu, u16 tss_selector, |
b237ac37 GN |
4577 | u16 old_tss_sel, u32 old_tss_base, |
4578 | struct desc_struct *nseg_desc) | |
37817f29 IE |
4579 | { |
4580 | struct tss_segment_16 tss_segment_16; | |
4581 | int ret = 0; | |
4582 | ||
34198bf8 MT |
4583 | if (kvm_read_guest(vcpu->kvm, old_tss_base, &tss_segment_16, |
4584 | sizeof tss_segment_16)) | |
37817f29 IE |
4585 | goto out; |
4586 | ||
4587 | save_state_to_tss16(vcpu, &tss_segment_16); | |
37817f29 | 4588 | |
34198bf8 MT |
4589 | if (kvm_write_guest(vcpu->kvm, old_tss_base, &tss_segment_16, |
4590 | sizeof tss_segment_16)) | |
37817f29 | 4591 | goto out; |
34198bf8 MT |
4592 | |
4593 | if (kvm_read_guest(vcpu->kvm, get_tss_base_addr(vcpu, nseg_desc), | |
4594 | &tss_segment_16, sizeof tss_segment_16)) | |
4595 | goto out; | |
4596 | ||
b237ac37 GN |
4597 | if (old_tss_sel != 0xffff) { |
4598 | tss_segment_16.prev_task_link = old_tss_sel; | |
4599 | ||
4600 | if (kvm_write_guest(vcpu->kvm, | |
4601 | get_tss_base_addr(vcpu, nseg_desc), | |
4602 | &tss_segment_16.prev_task_link, | |
4603 | sizeof tss_segment_16.prev_task_link)) | |
4604 | goto out; | |
4605 | } | |
4606 | ||
37817f29 IE |
4607 | if (load_state_from_tss16(vcpu, &tss_segment_16)) |
4608 | goto out; | |
4609 | ||
4610 | ret = 1; | |
4611 | out: | |
4612 | return ret; | |
4613 | } | |
4614 | ||
8b2cf73c | 4615 | static int kvm_task_switch_32(struct kvm_vcpu *vcpu, u16 tss_selector, |
b237ac37 | 4616 | u16 old_tss_sel, u32 old_tss_base, |
37817f29 IE |
4617 | struct desc_struct *nseg_desc) |
4618 | { | |
4619 | struct tss_segment_32 tss_segment_32; | |
4620 | int ret = 0; | |
4621 | ||
34198bf8 MT |
4622 | if (kvm_read_guest(vcpu->kvm, old_tss_base, &tss_segment_32, |
4623 | sizeof tss_segment_32)) | |
37817f29 IE |
4624 | goto out; |
4625 | ||
4626 | save_state_to_tss32(vcpu, &tss_segment_32); | |
37817f29 | 4627 | |
34198bf8 MT |
4628 | if (kvm_write_guest(vcpu->kvm, old_tss_base, &tss_segment_32, |
4629 | sizeof tss_segment_32)) | |
4630 | goto out; | |
4631 | ||
4632 | if (kvm_read_guest(vcpu->kvm, get_tss_base_addr(vcpu, nseg_desc), | |
4633 | &tss_segment_32, sizeof tss_segment_32)) | |
37817f29 | 4634 | goto out; |
34198bf8 | 4635 | |
b237ac37 GN |
4636 | if (old_tss_sel != 0xffff) { |
4637 | tss_segment_32.prev_task_link = old_tss_sel; | |
4638 | ||
4639 | if (kvm_write_guest(vcpu->kvm, | |
4640 | get_tss_base_addr(vcpu, nseg_desc), | |
4641 | &tss_segment_32.prev_task_link, | |
4642 | sizeof tss_segment_32.prev_task_link)) | |
4643 | goto out; | |
4644 | } | |
4645 | ||
37817f29 IE |
4646 | if (load_state_from_tss32(vcpu, &tss_segment_32)) |
4647 | goto out; | |
4648 | ||
4649 | ret = 1; | |
4650 | out: | |
4651 | return ret; | |
4652 | } | |
4653 | ||
4654 | int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int reason) | |
4655 | { | |
4656 | struct kvm_segment tr_seg; | |
4657 | struct desc_struct cseg_desc; | |
4658 | struct desc_struct nseg_desc; | |
4659 | int ret = 0; | |
34198bf8 MT |
4660 | u32 old_tss_base = get_segment_base(vcpu, VCPU_SREG_TR); |
4661 | u16 old_tss_sel = get_segment_selector(vcpu, VCPU_SREG_TR); | |
37817f29 | 4662 | |
34198bf8 | 4663 | old_tss_base = vcpu->arch.mmu.gva_to_gpa(vcpu, old_tss_base); |
37817f29 | 4664 | |
34198bf8 MT |
4665 | /* FIXME: Handle errors. Failure to read either TSS or their |
4666 | * descriptors should generate a pagefault. | |
4667 | */ | |
37817f29 IE |
4668 | if (load_guest_segment_descriptor(vcpu, tss_selector, &nseg_desc)) |
4669 | goto out; | |
4670 | ||
34198bf8 | 4671 | if (load_guest_segment_descriptor(vcpu, old_tss_sel, &cseg_desc)) |
37817f29 IE |
4672 | goto out; |
4673 | ||
37817f29 IE |
4674 | if (reason != TASK_SWITCH_IRET) { |
4675 | int cpl; | |
4676 | ||
4677 | cpl = kvm_x86_ops->get_cpl(vcpu); | |
4678 | if ((tss_selector & 3) > nseg_desc.dpl || cpl > nseg_desc.dpl) { | |
4679 | kvm_queue_exception_e(vcpu, GP_VECTOR, 0); | |
4680 | return 1; | |
4681 | } | |
4682 | } | |
4683 | ||
46a359e7 | 4684 | if (!nseg_desc.p || get_desc_limit(&nseg_desc) < 0x67) { |
37817f29 IE |
4685 | kvm_queue_exception_e(vcpu, TS_VECTOR, tss_selector & 0xfffc); |
4686 | return 1; | |
4687 | } | |
4688 | ||
4689 | if (reason == TASK_SWITCH_IRET || reason == TASK_SWITCH_JMP) { | |
3fe913e7 | 4690 | cseg_desc.type &= ~(1 << 1); //clear the B flag |
34198bf8 | 4691 | save_guest_segment_descriptor(vcpu, old_tss_sel, &cseg_desc); |
37817f29 IE |
4692 | } |
4693 | ||
4694 | if (reason == TASK_SWITCH_IRET) { | |
91586a3b JK |
4695 | u32 eflags = kvm_get_rflags(vcpu); |
4696 | kvm_set_rflags(vcpu, eflags & ~X86_EFLAGS_NT); | |
37817f29 IE |
4697 | } |
4698 | ||
b237ac37 GN |
4699 | /* set back link to prev task only if NT bit is set in eflags |
4700 | note that old_tss_sel is not used afetr this point */ | |
4701 | if (reason != TASK_SWITCH_CALL && reason != TASK_SWITCH_GATE) | |
4702 | old_tss_sel = 0xffff; | |
4703 | ||
37817f29 | 4704 | if (nseg_desc.type & 8) |
b237ac37 GN |
4705 | ret = kvm_task_switch_32(vcpu, tss_selector, old_tss_sel, |
4706 | old_tss_base, &nseg_desc); | |
37817f29 | 4707 | else |
b237ac37 GN |
4708 | ret = kvm_task_switch_16(vcpu, tss_selector, old_tss_sel, |
4709 | old_tss_base, &nseg_desc); | |
37817f29 IE |
4710 | |
4711 | if (reason == TASK_SWITCH_CALL || reason == TASK_SWITCH_GATE) { | |
91586a3b JK |
4712 | u32 eflags = kvm_get_rflags(vcpu); |
4713 | kvm_set_rflags(vcpu, eflags | X86_EFLAGS_NT); | |
37817f29 IE |
4714 | } |
4715 | ||
4716 | if (reason != TASK_SWITCH_IRET) { | |
3fe913e7 | 4717 | nseg_desc.type |= (1 << 1); |
37817f29 IE |
4718 | save_guest_segment_descriptor(vcpu, tss_selector, |
4719 | &nseg_desc); | |
4720 | } | |
4721 | ||
4722 | kvm_x86_ops->set_cr0(vcpu, vcpu->arch.cr0 | X86_CR0_TS); | |
4723 | seg_desct_to_kvm_desct(&nseg_desc, tss_selector, &tr_seg); | |
4724 | tr_seg.type = 11; | |
3e6e0aab | 4725 | kvm_set_segment(vcpu, &tr_seg, VCPU_SREG_TR); |
37817f29 | 4726 | out: |
37817f29 IE |
4727 | return ret; |
4728 | } | |
4729 | EXPORT_SYMBOL_GPL(kvm_task_switch); | |
4730 | ||
b6c7a5dc HB |
4731 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, |
4732 | struct kvm_sregs *sregs) | |
4733 | { | |
4734 | int mmu_reset_needed = 0; | |
923c61bb | 4735 | int pending_vec, max_bits; |
b6c7a5dc HB |
4736 | struct descriptor_table dt; |
4737 | ||
4738 | vcpu_load(vcpu); | |
4739 | ||
4740 | dt.limit = sregs->idt.limit; | |
4741 | dt.base = sregs->idt.base; | |
4742 | kvm_x86_ops->set_idt(vcpu, &dt); | |
4743 | dt.limit = sregs->gdt.limit; | |
4744 | dt.base = sregs->gdt.base; | |
4745 | kvm_x86_ops->set_gdt(vcpu, &dt); | |
4746 | ||
ad312c7c ZX |
4747 | vcpu->arch.cr2 = sregs->cr2; |
4748 | mmu_reset_needed |= vcpu->arch.cr3 != sregs->cr3; | |
dc7e795e | 4749 | vcpu->arch.cr3 = sregs->cr3; |
b6c7a5dc | 4750 | |
2d3ad1f4 | 4751 | kvm_set_cr8(vcpu, sregs->cr8); |
b6c7a5dc | 4752 | |
ad312c7c | 4753 | mmu_reset_needed |= vcpu->arch.shadow_efer != sregs->efer; |
b6c7a5dc | 4754 | kvm_x86_ops->set_efer(vcpu, sregs->efer); |
b6c7a5dc HB |
4755 | kvm_set_apic_base(vcpu, sregs->apic_base); |
4756 | ||
ad312c7c | 4757 | mmu_reset_needed |= vcpu->arch.cr0 != sregs->cr0; |
b6c7a5dc | 4758 | kvm_x86_ops->set_cr0(vcpu, sregs->cr0); |
d7306163 | 4759 | vcpu->arch.cr0 = sregs->cr0; |
b6c7a5dc | 4760 | |
fc78f519 | 4761 | mmu_reset_needed |= kvm_read_cr4(vcpu) != sregs->cr4; |
b6c7a5dc | 4762 | kvm_x86_ops->set_cr4(vcpu, sregs->cr4); |
7c93be44 | 4763 | if (!is_long_mode(vcpu) && is_pae(vcpu)) { |
ad312c7c | 4764 | load_pdptrs(vcpu, vcpu->arch.cr3); |
7c93be44 MT |
4765 | mmu_reset_needed = 1; |
4766 | } | |
b6c7a5dc HB |
4767 | |
4768 | if (mmu_reset_needed) | |
4769 | kvm_mmu_reset_context(vcpu); | |
4770 | ||
923c61bb GN |
4771 | max_bits = (sizeof sregs->interrupt_bitmap) << 3; |
4772 | pending_vec = find_first_bit( | |
4773 | (const unsigned long *)sregs->interrupt_bitmap, max_bits); | |
4774 | if (pending_vec < max_bits) { | |
66fd3f7f | 4775 | kvm_queue_interrupt(vcpu, pending_vec, false); |
923c61bb GN |
4776 | pr_debug("Set back pending irq %d\n", pending_vec); |
4777 | if (irqchip_in_kernel(vcpu->kvm)) | |
4778 | kvm_pic_clear_isr_ack(vcpu->kvm); | |
b6c7a5dc HB |
4779 | } |
4780 | ||
3e6e0aab GT |
4781 | kvm_set_segment(vcpu, &sregs->cs, VCPU_SREG_CS); |
4782 | kvm_set_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
4783 | kvm_set_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
4784 | kvm_set_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
4785 | kvm_set_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
4786 | kvm_set_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
b6c7a5dc | 4787 | |
3e6e0aab GT |
4788 | kvm_set_segment(vcpu, &sregs->tr, VCPU_SREG_TR); |
4789 | kvm_set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
b6c7a5dc | 4790 | |
5f0269f5 ME |
4791 | update_cr8_intercept(vcpu); |
4792 | ||
9c3e4aab | 4793 | /* Older userspace won't unhalt the vcpu on reset. */ |
c5af89b6 | 4794 | if (kvm_vcpu_is_bsp(vcpu) && kvm_rip_read(vcpu) == 0xfff0 && |
9c3e4aab MT |
4795 | sregs->cs.selector == 0xf000 && sregs->cs.base == 0xffff0000 && |
4796 | !(vcpu->arch.cr0 & X86_CR0_PE)) | |
4797 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; | |
4798 | ||
b6c7a5dc HB |
4799 | vcpu_put(vcpu); |
4800 | ||
4801 | return 0; | |
4802 | } | |
4803 | ||
d0bfb940 JK |
4804 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
4805 | struct kvm_guest_debug *dbg) | |
b6c7a5dc | 4806 | { |
355be0b9 | 4807 | unsigned long rflags; |
ae675ef0 | 4808 | int i, r; |
b6c7a5dc HB |
4809 | |
4810 | vcpu_load(vcpu); | |
4811 | ||
4f926bf2 JK |
4812 | if (dbg->control & (KVM_GUESTDBG_INJECT_DB | KVM_GUESTDBG_INJECT_BP)) { |
4813 | r = -EBUSY; | |
4814 | if (vcpu->arch.exception.pending) | |
4815 | goto unlock_out; | |
4816 | if (dbg->control & KVM_GUESTDBG_INJECT_DB) | |
4817 | kvm_queue_exception(vcpu, DB_VECTOR); | |
4818 | else | |
4819 | kvm_queue_exception(vcpu, BP_VECTOR); | |
4820 | } | |
4821 | ||
91586a3b JK |
4822 | /* |
4823 | * Read rflags as long as potentially injected trace flags are still | |
4824 | * filtered out. | |
4825 | */ | |
4826 | rflags = kvm_get_rflags(vcpu); | |
355be0b9 JK |
4827 | |
4828 | vcpu->guest_debug = dbg->control; | |
4829 | if (!(vcpu->guest_debug & KVM_GUESTDBG_ENABLE)) | |
4830 | vcpu->guest_debug = 0; | |
4831 | ||
4832 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) { | |
ae675ef0 JK |
4833 | for (i = 0; i < KVM_NR_DB_REGS; ++i) |
4834 | vcpu->arch.eff_db[i] = dbg->arch.debugreg[i]; | |
4835 | vcpu->arch.switch_db_regs = | |
4836 | (dbg->arch.debugreg[7] & DR7_BP_EN_MASK); | |
4837 | } else { | |
4838 | for (i = 0; i < KVM_NR_DB_REGS; i++) | |
4839 | vcpu->arch.eff_db[i] = vcpu->arch.db[i]; | |
4840 | vcpu->arch.switch_db_regs = (vcpu->arch.dr7 & DR7_BP_EN_MASK); | |
4841 | } | |
4842 | ||
94fe45da JK |
4843 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) { |
4844 | vcpu->arch.singlestep_cs = | |
4845 | get_segment_selector(vcpu, VCPU_SREG_CS); | |
4846 | vcpu->arch.singlestep_rip = kvm_rip_read(vcpu); | |
4847 | } | |
4848 | ||
91586a3b JK |
4849 | /* |
4850 | * Trigger an rflags update that will inject or remove the trace | |
4851 | * flags. | |
4852 | */ | |
4853 | kvm_set_rflags(vcpu, rflags); | |
b6c7a5dc | 4854 | |
355be0b9 | 4855 | kvm_x86_ops->set_guest_debug(vcpu, dbg); |
b6c7a5dc | 4856 | |
4f926bf2 | 4857 | r = 0; |
d0bfb940 | 4858 | |
4f926bf2 | 4859 | unlock_out: |
b6c7a5dc HB |
4860 | vcpu_put(vcpu); |
4861 | ||
4862 | return r; | |
4863 | } | |
4864 | ||
d0752060 HB |
4865 | /* |
4866 | * fxsave fpu state. Taken from x86_64/processor.h. To be killed when | |
4867 | * we have asm/x86/processor.h | |
4868 | */ | |
4869 | struct fxsave { | |
4870 | u16 cwd; | |
4871 | u16 swd; | |
4872 | u16 twd; | |
4873 | u16 fop; | |
4874 | u64 rip; | |
4875 | u64 rdp; | |
4876 | u32 mxcsr; | |
4877 | u32 mxcsr_mask; | |
4878 | u32 st_space[32]; /* 8*16 bytes for each FP-reg = 128 bytes */ | |
4879 | #ifdef CONFIG_X86_64 | |
4880 | u32 xmm_space[64]; /* 16*16 bytes for each XMM-reg = 256 bytes */ | |
4881 | #else | |
4882 | u32 xmm_space[32]; /* 8*16 bytes for each XMM-reg = 128 bytes */ | |
4883 | #endif | |
4884 | }; | |
4885 | ||
8b006791 ZX |
4886 | /* |
4887 | * Translate a guest virtual address to a guest physical address. | |
4888 | */ | |
4889 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, | |
4890 | struct kvm_translation *tr) | |
4891 | { | |
4892 | unsigned long vaddr = tr->linear_address; | |
4893 | gpa_t gpa; | |
4894 | ||
4895 | vcpu_load(vcpu); | |
72dc67a6 | 4896 | down_read(&vcpu->kvm->slots_lock); |
ad312c7c | 4897 | gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, vaddr); |
72dc67a6 | 4898 | up_read(&vcpu->kvm->slots_lock); |
8b006791 ZX |
4899 | tr->physical_address = gpa; |
4900 | tr->valid = gpa != UNMAPPED_GVA; | |
4901 | tr->writeable = 1; | |
4902 | tr->usermode = 0; | |
8b006791 ZX |
4903 | vcpu_put(vcpu); |
4904 | ||
4905 | return 0; | |
4906 | } | |
4907 | ||
d0752060 HB |
4908 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) |
4909 | { | |
ad312c7c | 4910 | struct fxsave *fxsave = (struct fxsave *)&vcpu->arch.guest_fx_image; |
d0752060 HB |
4911 | |
4912 | vcpu_load(vcpu); | |
4913 | ||
4914 | memcpy(fpu->fpr, fxsave->st_space, 128); | |
4915 | fpu->fcw = fxsave->cwd; | |
4916 | fpu->fsw = fxsave->swd; | |
4917 | fpu->ftwx = fxsave->twd; | |
4918 | fpu->last_opcode = fxsave->fop; | |
4919 | fpu->last_ip = fxsave->rip; | |
4920 | fpu->last_dp = fxsave->rdp; | |
4921 | memcpy(fpu->xmm, fxsave->xmm_space, sizeof fxsave->xmm_space); | |
4922 | ||
4923 | vcpu_put(vcpu); | |
4924 | ||
4925 | return 0; | |
4926 | } | |
4927 | ||
4928 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
4929 | { | |
ad312c7c | 4930 | struct fxsave *fxsave = (struct fxsave *)&vcpu->arch.guest_fx_image; |
d0752060 HB |
4931 | |
4932 | vcpu_load(vcpu); | |
4933 | ||
4934 | memcpy(fxsave->st_space, fpu->fpr, 128); | |
4935 | fxsave->cwd = fpu->fcw; | |
4936 | fxsave->swd = fpu->fsw; | |
4937 | fxsave->twd = fpu->ftwx; | |
4938 | fxsave->fop = fpu->last_opcode; | |
4939 | fxsave->rip = fpu->last_ip; | |
4940 | fxsave->rdp = fpu->last_dp; | |
4941 | memcpy(fxsave->xmm_space, fpu->xmm, sizeof fxsave->xmm_space); | |
4942 | ||
4943 | vcpu_put(vcpu); | |
4944 | ||
4945 | return 0; | |
4946 | } | |
4947 | ||
4948 | void fx_init(struct kvm_vcpu *vcpu) | |
4949 | { | |
4950 | unsigned after_mxcsr_mask; | |
4951 | ||
bc1a34f1 AA |
4952 | /* |
4953 | * Touch the fpu the first time in non atomic context as if | |
4954 | * this is the first fpu instruction the exception handler | |
4955 | * will fire before the instruction returns and it'll have to | |
4956 | * allocate ram with GFP_KERNEL. | |
4957 | */ | |
4958 | if (!used_math()) | |
d6e88aec | 4959 | kvm_fx_save(&vcpu->arch.host_fx_image); |
bc1a34f1 | 4960 | |
d0752060 HB |
4961 | /* Initialize guest FPU by resetting ours and saving into guest's */ |
4962 | preempt_disable(); | |
d6e88aec AK |
4963 | kvm_fx_save(&vcpu->arch.host_fx_image); |
4964 | kvm_fx_finit(); | |
4965 | kvm_fx_save(&vcpu->arch.guest_fx_image); | |
4966 | kvm_fx_restore(&vcpu->arch.host_fx_image); | |
d0752060 HB |
4967 | preempt_enable(); |
4968 | ||
ad312c7c | 4969 | vcpu->arch.cr0 |= X86_CR0_ET; |
d0752060 | 4970 | after_mxcsr_mask = offsetof(struct i387_fxsave_struct, st_space); |
ad312c7c ZX |
4971 | vcpu->arch.guest_fx_image.mxcsr = 0x1f80; |
4972 | memset((void *)&vcpu->arch.guest_fx_image + after_mxcsr_mask, | |
d0752060 HB |
4973 | 0, sizeof(struct i387_fxsave_struct) - after_mxcsr_mask); |
4974 | } | |
4975 | EXPORT_SYMBOL_GPL(fx_init); | |
4976 | ||
4977 | void kvm_load_guest_fpu(struct kvm_vcpu *vcpu) | |
4978 | { | |
4979 | if (!vcpu->fpu_active || vcpu->guest_fpu_loaded) | |
4980 | return; | |
4981 | ||
4982 | vcpu->guest_fpu_loaded = 1; | |
d6e88aec AK |
4983 | kvm_fx_save(&vcpu->arch.host_fx_image); |
4984 | kvm_fx_restore(&vcpu->arch.guest_fx_image); | |
d0752060 HB |
4985 | } |
4986 | EXPORT_SYMBOL_GPL(kvm_load_guest_fpu); | |
4987 | ||
4988 | void kvm_put_guest_fpu(struct kvm_vcpu *vcpu) | |
4989 | { | |
4990 | if (!vcpu->guest_fpu_loaded) | |
4991 | return; | |
4992 | ||
4993 | vcpu->guest_fpu_loaded = 0; | |
d6e88aec AK |
4994 | kvm_fx_save(&vcpu->arch.guest_fx_image); |
4995 | kvm_fx_restore(&vcpu->arch.host_fx_image); | |
f096ed85 | 4996 | ++vcpu->stat.fpu_reload; |
d0752060 HB |
4997 | } |
4998 | EXPORT_SYMBOL_GPL(kvm_put_guest_fpu); | |
e9b11c17 ZX |
4999 | |
5000 | void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu) | |
5001 | { | |
7f1ea208 JR |
5002 | if (vcpu->arch.time_page) { |
5003 | kvm_release_page_dirty(vcpu->arch.time_page); | |
5004 | vcpu->arch.time_page = NULL; | |
5005 | } | |
5006 | ||
e9b11c17 ZX |
5007 | kvm_x86_ops->vcpu_free(vcpu); |
5008 | } | |
5009 | ||
5010 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, | |
5011 | unsigned int id) | |
5012 | { | |
26e5215f AK |
5013 | return kvm_x86_ops->vcpu_create(kvm, id); |
5014 | } | |
e9b11c17 | 5015 | |
26e5215f AK |
5016 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) |
5017 | { | |
5018 | int r; | |
e9b11c17 ZX |
5019 | |
5020 | /* We do fxsave: this must be aligned. */ | |
ad312c7c | 5021 | BUG_ON((unsigned long)&vcpu->arch.host_fx_image & 0xF); |
e9b11c17 | 5022 | |
0bed3b56 | 5023 | vcpu->arch.mtrr_state.have_fixed = 1; |
e9b11c17 ZX |
5024 | vcpu_load(vcpu); |
5025 | r = kvm_arch_vcpu_reset(vcpu); | |
5026 | if (r == 0) | |
5027 | r = kvm_mmu_setup(vcpu); | |
5028 | vcpu_put(vcpu); | |
5029 | if (r < 0) | |
5030 | goto free_vcpu; | |
5031 | ||
26e5215f | 5032 | return 0; |
e9b11c17 ZX |
5033 | free_vcpu: |
5034 | kvm_x86_ops->vcpu_free(vcpu); | |
26e5215f | 5035 | return r; |
e9b11c17 ZX |
5036 | } |
5037 | ||
d40ccc62 | 5038 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
e9b11c17 ZX |
5039 | { |
5040 | vcpu_load(vcpu); | |
5041 | kvm_mmu_unload(vcpu); | |
5042 | vcpu_put(vcpu); | |
5043 | ||
5044 | kvm_x86_ops->vcpu_free(vcpu); | |
5045 | } | |
5046 | ||
5047 | int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu) | |
5048 | { | |
448fa4a9 JK |
5049 | vcpu->arch.nmi_pending = false; |
5050 | vcpu->arch.nmi_injected = false; | |
5051 | ||
42dbaa5a JK |
5052 | vcpu->arch.switch_db_regs = 0; |
5053 | memset(vcpu->arch.db, 0, sizeof(vcpu->arch.db)); | |
5054 | vcpu->arch.dr6 = DR6_FIXED_1; | |
5055 | vcpu->arch.dr7 = DR7_FIXED_1; | |
5056 | ||
e9b11c17 ZX |
5057 | return kvm_x86_ops->vcpu_reset(vcpu); |
5058 | } | |
5059 | ||
10474ae8 | 5060 | int kvm_arch_hardware_enable(void *garbage) |
e9b11c17 | 5061 | { |
0cca7907 ZA |
5062 | /* |
5063 | * Since this may be called from a hotplug notifcation, | |
5064 | * we can't get the CPU frequency directly. | |
5065 | */ | |
5066 | if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) { | |
5067 | int cpu = raw_smp_processor_id(); | |
5068 | per_cpu(cpu_tsc_khz, cpu) = 0; | |
5069 | } | |
18863bdd AK |
5070 | |
5071 | kvm_shared_msr_cpu_online(); | |
5072 | ||
10474ae8 | 5073 | return kvm_x86_ops->hardware_enable(garbage); |
e9b11c17 ZX |
5074 | } |
5075 | ||
5076 | void kvm_arch_hardware_disable(void *garbage) | |
5077 | { | |
5078 | kvm_x86_ops->hardware_disable(garbage); | |
3548bab5 | 5079 | drop_user_return_notifiers(garbage); |
e9b11c17 ZX |
5080 | } |
5081 | ||
5082 | int kvm_arch_hardware_setup(void) | |
5083 | { | |
5084 | return kvm_x86_ops->hardware_setup(); | |
5085 | } | |
5086 | ||
5087 | void kvm_arch_hardware_unsetup(void) | |
5088 | { | |
5089 | kvm_x86_ops->hardware_unsetup(); | |
5090 | } | |
5091 | ||
5092 | void kvm_arch_check_processor_compat(void *rtn) | |
5093 | { | |
5094 | kvm_x86_ops->check_processor_compatibility(rtn); | |
5095 | } | |
5096 | ||
5097 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) | |
5098 | { | |
5099 | struct page *page; | |
5100 | struct kvm *kvm; | |
5101 | int r; | |
5102 | ||
5103 | BUG_ON(vcpu->kvm == NULL); | |
5104 | kvm = vcpu->kvm; | |
5105 | ||
ad312c7c | 5106 | vcpu->arch.mmu.root_hpa = INVALID_PAGE; |
c5af89b6 | 5107 | if (!irqchip_in_kernel(kvm) || kvm_vcpu_is_bsp(vcpu)) |
a4535290 | 5108 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
e9b11c17 | 5109 | else |
a4535290 | 5110 | vcpu->arch.mp_state = KVM_MP_STATE_UNINITIALIZED; |
e9b11c17 ZX |
5111 | |
5112 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
5113 | if (!page) { | |
5114 | r = -ENOMEM; | |
5115 | goto fail; | |
5116 | } | |
ad312c7c | 5117 | vcpu->arch.pio_data = page_address(page); |
e9b11c17 ZX |
5118 | |
5119 | r = kvm_mmu_create(vcpu); | |
5120 | if (r < 0) | |
5121 | goto fail_free_pio_data; | |
5122 | ||
5123 | if (irqchip_in_kernel(kvm)) { | |
5124 | r = kvm_create_lapic(vcpu); | |
5125 | if (r < 0) | |
5126 | goto fail_mmu_destroy; | |
5127 | } | |
5128 | ||
890ca9ae HY |
5129 | vcpu->arch.mce_banks = kzalloc(KVM_MAX_MCE_BANKS * sizeof(u64) * 4, |
5130 | GFP_KERNEL); | |
5131 | if (!vcpu->arch.mce_banks) { | |
5132 | r = -ENOMEM; | |
443c39bc | 5133 | goto fail_free_lapic; |
890ca9ae HY |
5134 | } |
5135 | vcpu->arch.mcg_cap = KVM_MAX_MCE_BANKS; | |
5136 | ||
e9b11c17 | 5137 | return 0; |
443c39bc WY |
5138 | fail_free_lapic: |
5139 | kvm_free_lapic(vcpu); | |
e9b11c17 ZX |
5140 | fail_mmu_destroy: |
5141 | kvm_mmu_destroy(vcpu); | |
5142 | fail_free_pio_data: | |
ad312c7c | 5143 | free_page((unsigned long)vcpu->arch.pio_data); |
e9b11c17 ZX |
5144 | fail: |
5145 | return r; | |
5146 | } | |
5147 | ||
5148 | void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) | |
5149 | { | |
36cb93fd | 5150 | kfree(vcpu->arch.mce_banks); |
e9b11c17 | 5151 | kvm_free_lapic(vcpu); |
3200f405 | 5152 | down_read(&vcpu->kvm->slots_lock); |
e9b11c17 | 5153 | kvm_mmu_destroy(vcpu); |
3200f405 | 5154 | up_read(&vcpu->kvm->slots_lock); |
ad312c7c | 5155 | free_page((unsigned long)vcpu->arch.pio_data); |
e9b11c17 | 5156 | } |
d19a9cd2 ZX |
5157 | |
5158 | struct kvm *kvm_arch_create_vm(void) | |
5159 | { | |
5160 | struct kvm *kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL); | |
5161 | ||
5162 | if (!kvm) | |
5163 | return ERR_PTR(-ENOMEM); | |
5164 | ||
fef9cce0 MT |
5165 | kvm->arch.aliases = kzalloc(sizeof(struct kvm_mem_aliases), GFP_KERNEL); |
5166 | if (!kvm->arch.aliases) { | |
5167 | kfree(kvm); | |
5168 | return ERR_PTR(-ENOMEM); | |
5169 | } | |
5170 | ||
f05e70ac | 5171 | INIT_LIST_HEAD(&kvm->arch.active_mmu_pages); |
4d5c5d0f | 5172 | INIT_LIST_HEAD(&kvm->arch.assigned_dev_head); |
d19a9cd2 | 5173 | |
5550af4d SY |
5174 | /* Reserve bit 0 of irq_sources_bitmap for userspace irq source */ |
5175 | set_bit(KVM_USERSPACE_IRQ_SOURCE_ID, &kvm->arch.irq_sources_bitmap); | |
5176 | ||
53f658b3 MT |
5177 | rdtscll(kvm->arch.vm_init_tsc); |
5178 | ||
d19a9cd2 ZX |
5179 | return kvm; |
5180 | } | |
5181 | ||
5182 | static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu) | |
5183 | { | |
5184 | vcpu_load(vcpu); | |
5185 | kvm_mmu_unload(vcpu); | |
5186 | vcpu_put(vcpu); | |
5187 | } | |
5188 | ||
5189 | static void kvm_free_vcpus(struct kvm *kvm) | |
5190 | { | |
5191 | unsigned int i; | |
988a2cae | 5192 | struct kvm_vcpu *vcpu; |
d19a9cd2 ZX |
5193 | |
5194 | /* | |
5195 | * Unpin any mmu pages first. | |
5196 | */ | |
988a2cae GN |
5197 | kvm_for_each_vcpu(i, vcpu, kvm) |
5198 | kvm_unload_vcpu_mmu(vcpu); | |
5199 | kvm_for_each_vcpu(i, vcpu, kvm) | |
5200 | kvm_arch_vcpu_free(vcpu); | |
5201 | ||
5202 | mutex_lock(&kvm->lock); | |
5203 | for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) | |
5204 | kvm->vcpus[i] = NULL; | |
d19a9cd2 | 5205 | |
988a2cae GN |
5206 | atomic_set(&kvm->online_vcpus, 0); |
5207 | mutex_unlock(&kvm->lock); | |
d19a9cd2 ZX |
5208 | } |
5209 | ||
ad8ba2cd SY |
5210 | void kvm_arch_sync_events(struct kvm *kvm) |
5211 | { | |
ba4cef31 | 5212 | kvm_free_all_assigned_devices(kvm); |
ad8ba2cd SY |
5213 | } |
5214 | ||
d19a9cd2 ZX |
5215 | void kvm_arch_destroy_vm(struct kvm *kvm) |
5216 | { | |
6eb55818 | 5217 | kvm_iommu_unmap_guest(kvm); |
7837699f | 5218 | kvm_free_pit(kvm); |
d7deeeb0 ZX |
5219 | kfree(kvm->arch.vpic); |
5220 | kfree(kvm->arch.vioapic); | |
d19a9cd2 ZX |
5221 | kvm_free_vcpus(kvm); |
5222 | kvm_free_physmem(kvm); | |
3d45830c AK |
5223 | if (kvm->arch.apic_access_page) |
5224 | put_page(kvm->arch.apic_access_page); | |
b7ebfb05 SY |
5225 | if (kvm->arch.ept_identity_pagetable) |
5226 | put_page(kvm->arch.ept_identity_pagetable); | |
fef9cce0 | 5227 | kfree(kvm->arch.aliases); |
d19a9cd2 ZX |
5228 | kfree(kvm); |
5229 | } | |
0de10343 ZX |
5230 | |
5231 | int kvm_arch_set_memory_region(struct kvm *kvm, | |
5232 | struct kvm_userspace_memory_region *mem, | |
5233 | struct kvm_memory_slot old, | |
5234 | int user_alloc) | |
5235 | { | |
5236 | int npages = mem->memory_size >> PAGE_SHIFT; | |
46a26bf5 | 5237 | struct kvm_memory_slot *memslot = &kvm->memslots->memslots[mem->slot]; |
0de10343 ZX |
5238 | |
5239 | /*To keep backward compatibility with older userspace, | |
5240 | *x86 needs to hanlde !user_alloc case. | |
5241 | */ | |
5242 | if (!user_alloc) { | |
5243 | if (npages && !old.rmap) { | |
604b38ac AA |
5244 | unsigned long userspace_addr; |
5245 | ||
72dc67a6 | 5246 | down_write(¤t->mm->mmap_sem); |
604b38ac AA |
5247 | userspace_addr = do_mmap(NULL, 0, |
5248 | npages * PAGE_SIZE, | |
5249 | PROT_READ | PROT_WRITE, | |
acee3c04 | 5250 | MAP_PRIVATE | MAP_ANONYMOUS, |
604b38ac | 5251 | 0); |
72dc67a6 | 5252 | up_write(¤t->mm->mmap_sem); |
0de10343 | 5253 | |
604b38ac AA |
5254 | if (IS_ERR((void *)userspace_addr)) |
5255 | return PTR_ERR((void *)userspace_addr); | |
5256 | ||
5257 | /* set userspace_addr atomically for kvm_hva_to_rmapp */ | |
5258 | spin_lock(&kvm->mmu_lock); | |
5259 | memslot->userspace_addr = userspace_addr; | |
5260 | spin_unlock(&kvm->mmu_lock); | |
0de10343 ZX |
5261 | } else { |
5262 | if (!old.user_alloc && old.rmap) { | |
5263 | int ret; | |
5264 | ||
72dc67a6 | 5265 | down_write(¤t->mm->mmap_sem); |
0de10343 ZX |
5266 | ret = do_munmap(current->mm, old.userspace_addr, |
5267 | old.npages * PAGE_SIZE); | |
72dc67a6 | 5268 | up_write(¤t->mm->mmap_sem); |
0de10343 ZX |
5269 | if (ret < 0) |
5270 | printk(KERN_WARNING | |
5271 | "kvm_vm_ioctl_set_memory_region: " | |
5272 | "failed to munmap memory\n"); | |
5273 | } | |
5274 | } | |
5275 | } | |
5276 | ||
7c8a83b7 | 5277 | spin_lock(&kvm->mmu_lock); |
f05e70ac | 5278 | if (!kvm->arch.n_requested_mmu_pages) { |
0de10343 ZX |
5279 | unsigned int nr_mmu_pages = kvm_mmu_calculate_mmu_pages(kvm); |
5280 | kvm_mmu_change_mmu_pages(kvm, nr_mmu_pages); | |
5281 | } | |
5282 | ||
5283 | kvm_mmu_slot_remove_write_access(kvm, mem->slot); | |
7c8a83b7 | 5284 | spin_unlock(&kvm->mmu_lock); |
0de10343 ZX |
5285 | |
5286 | return 0; | |
5287 | } | |
1d737c8a | 5288 | |
34d4cb8f MT |
5289 | void kvm_arch_flush_shadow(struct kvm *kvm) |
5290 | { | |
5291 | kvm_mmu_zap_all(kvm); | |
8986ecc0 | 5292 | kvm_reload_remote_mmus(kvm); |
34d4cb8f MT |
5293 | } |
5294 | ||
1d737c8a ZX |
5295 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
5296 | { | |
a4535290 | 5297 | return vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE |
a1b37100 GN |
5298 | || vcpu->arch.mp_state == KVM_MP_STATE_SIPI_RECEIVED |
5299 | || vcpu->arch.nmi_pending || | |
5300 | (kvm_arch_interrupt_allowed(vcpu) && | |
5301 | kvm_cpu_has_interrupt(vcpu)); | |
1d737c8a | 5302 | } |
5736199a | 5303 | |
5736199a ZX |
5304 | void kvm_vcpu_kick(struct kvm_vcpu *vcpu) |
5305 | { | |
32f88400 MT |
5306 | int me; |
5307 | int cpu = vcpu->cpu; | |
5736199a ZX |
5308 | |
5309 | if (waitqueue_active(&vcpu->wq)) { | |
5310 | wake_up_interruptible(&vcpu->wq); | |
5311 | ++vcpu->stat.halt_wakeup; | |
5312 | } | |
32f88400 MT |
5313 | |
5314 | me = get_cpu(); | |
5315 | if (cpu != me && (unsigned)cpu < nr_cpu_ids && cpu_online(cpu)) | |
5316 | if (!test_and_set_bit(KVM_REQ_KICK, &vcpu->requests)) | |
5317 | smp_send_reschedule(cpu); | |
e9571ed5 | 5318 | put_cpu(); |
5736199a | 5319 | } |
78646121 GN |
5320 | |
5321 | int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu) | |
5322 | { | |
5323 | return kvm_x86_ops->interrupt_allowed(vcpu); | |
5324 | } | |
229456fc | 5325 | |
94fe45da JK |
5326 | unsigned long kvm_get_rflags(struct kvm_vcpu *vcpu) |
5327 | { | |
5328 | unsigned long rflags; | |
5329 | ||
5330 | rflags = kvm_x86_ops->get_rflags(vcpu); | |
5331 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) | |
5332 | rflags &= ~(unsigned long)(X86_EFLAGS_TF | X86_EFLAGS_RF); | |
5333 | return rflags; | |
5334 | } | |
5335 | EXPORT_SYMBOL_GPL(kvm_get_rflags); | |
5336 | ||
5337 | void kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags) | |
5338 | { | |
5339 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP && | |
5340 | vcpu->arch.singlestep_cs == | |
5341 | get_segment_selector(vcpu, VCPU_SREG_CS) && | |
5342 | vcpu->arch.singlestep_rip == kvm_rip_read(vcpu)) | |
5343 | rflags |= X86_EFLAGS_TF | X86_EFLAGS_RF; | |
5344 | kvm_x86_ops->set_rflags(vcpu, rflags); | |
5345 | } | |
5346 | EXPORT_SYMBOL_GPL(kvm_set_rflags); | |
5347 | ||
229456fc MT |
5348 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_exit); |
5349 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_inj_virq); | |
5350 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_page_fault); | |
5351 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_msr); | |
5352 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_cr); | |
0ac406de | 5353 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmrun); |
d8cabddf | 5354 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit); |
17897f36 | 5355 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit_inject); |
236649de | 5356 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intr_vmexit); |
ec1ff790 | 5357 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_invlpga); |
532a46b9 | 5358 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_skinit); |