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05330448 AL |
1 | /* |
2 | * QEMU KVM support | |
3 | * | |
4 | * Copyright (C) 2006-2008 Qumranet Technologies | |
5 | * Copyright IBM, Corp. 2008 | |
6 | * | |
7 | * Authors: | |
8 | * Anthony Liguori <aliguori@us.ibm.com> | |
9 | * | |
10 | * This work is licensed under the terms of the GNU GPL, version 2 or later. | |
11 | * See the COPYING file in the top-level directory. | |
12 | * | |
13 | */ | |
14 | ||
15 | #include <sys/types.h> | |
16 | #include <sys/ioctl.h> | |
17 | #include <sys/mman.h> | |
25d2e361 | 18 | #include <sys/utsname.h> |
05330448 AL |
19 | |
20 | #include <linux/kvm.h> | |
21 | ||
22 | #include "qemu-common.h" | |
23 | #include "sysemu.h" | |
24 | #include "kvm.h" | |
25 | #include "cpu.h" | |
e22a25c9 | 26 | #include "gdbstub.h" |
0e607a80 | 27 | #include "host-utils.h" |
4c5b10b7 | 28 | #include "hw/pc.h" |
408392b3 | 29 | #include "hw/apic.h" |
35bed8ee | 30 | #include "ioport.h" |
e7701825 | 31 | #include "kvm_x86.h" |
05330448 | 32 | |
bb0300dc GN |
33 | #ifdef CONFIG_KVM_PARA |
34 | #include <linux/kvm_para.h> | |
35 | #endif | |
36 | // | |
05330448 AL |
37 | //#define DEBUG_KVM |
38 | ||
39 | #ifdef DEBUG_KVM | |
8c0d577e | 40 | #define DPRINTF(fmt, ...) \ |
05330448 AL |
41 | do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) |
42 | #else | |
8c0d577e | 43 | #define DPRINTF(fmt, ...) \ |
05330448 AL |
44 | do { } while (0) |
45 | #endif | |
46 | ||
1a03675d GC |
47 | #define MSR_KVM_WALL_CLOCK 0x11 |
48 | #define MSR_KVM_SYSTEM_TIME 0x12 | |
49 | ||
c0532a76 MT |
50 | #ifndef BUS_MCEERR_AR |
51 | #define BUS_MCEERR_AR 4 | |
52 | #endif | |
53 | #ifndef BUS_MCEERR_AO | |
54 | #define BUS_MCEERR_AO 5 | |
55 | #endif | |
56 | ||
94a8d39a JK |
57 | const KVMCapabilityInfo kvm_arch_required_capabilities[] = { |
58 | KVM_CAP_INFO(SET_TSS_ADDR), | |
59 | KVM_CAP_INFO(EXT_CPUID), | |
60 | KVM_CAP_INFO(MP_STATE), | |
61 | KVM_CAP_LAST_INFO | |
62 | }; | |
63 | ||
c3a3a7d3 JK |
64 | static bool has_msr_star; |
65 | static bool has_msr_hsave_pa; | |
25d2e361 MT |
66 | static int lm_capable_kernel; |
67 | ||
b827df58 AK |
68 | static struct kvm_cpuid2 *try_get_cpuid(KVMState *s, int max) |
69 | { | |
70 | struct kvm_cpuid2 *cpuid; | |
71 | int r, size; | |
72 | ||
73 | size = sizeof(*cpuid) + max * sizeof(*cpuid->entries); | |
74 | cpuid = (struct kvm_cpuid2 *)qemu_mallocz(size); | |
75 | cpuid->nent = max; | |
76 | r = kvm_ioctl(s, KVM_GET_SUPPORTED_CPUID, cpuid); | |
76ae317f MM |
77 | if (r == 0 && cpuid->nent >= max) { |
78 | r = -E2BIG; | |
79 | } | |
b827df58 AK |
80 | if (r < 0) { |
81 | if (r == -E2BIG) { | |
82 | qemu_free(cpuid); | |
83 | return NULL; | |
84 | } else { | |
85 | fprintf(stderr, "KVM_GET_SUPPORTED_CPUID failed: %s\n", | |
86 | strerror(-r)); | |
87 | exit(1); | |
88 | } | |
89 | } | |
90 | return cpuid; | |
91 | } | |
92 | ||
c958a8bd SY |
93 | uint32_t kvm_arch_get_supported_cpuid(CPUState *env, uint32_t function, |
94 | uint32_t index, int reg) | |
b827df58 AK |
95 | { |
96 | struct kvm_cpuid2 *cpuid; | |
97 | int i, max; | |
98 | uint32_t ret = 0; | |
99 | uint32_t cpuid_1_edx; | |
100 | ||
b827df58 AK |
101 | max = 1; |
102 | while ((cpuid = try_get_cpuid(env->kvm_state, max)) == NULL) { | |
103 | max *= 2; | |
104 | } | |
105 | ||
106 | for (i = 0; i < cpuid->nent; ++i) { | |
c958a8bd SY |
107 | if (cpuid->entries[i].function == function && |
108 | cpuid->entries[i].index == index) { | |
b827df58 AK |
109 | switch (reg) { |
110 | case R_EAX: | |
111 | ret = cpuid->entries[i].eax; | |
112 | break; | |
113 | case R_EBX: | |
114 | ret = cpuid->entries[i].ebx; | |
115 | break; | |
116 | case R_ECX: | |
117 | ret = cpuid->entries[i].ecx; | |
118 | break; | |
119 | case R_EDX: | |
120 | ret = cpuid->entries[i].edx; | |
19ccb8ea JK |
121 | switch (function) { |
122 | case 1: | |
123 | /* KVM before 2.6.30 misreports the following features */ | |
124 | ret |= CPUID_MTRR | CPUID_PAT | CPUID_MCE | CPUID_MCA; | |
125 | break; | |
126 | case 0x80000001: | |
b827df58 AK |
127 | /* On Intel, kvm returns cpuid according to the Intel spec, |
128 | * so add missing bits according to the AMD spec: | |
129 | */ | |
c958a8bd | 130 | cpuid_1_edx = kvm_arch_get_supported_cpuid(env, 1, 0, R_EDX); |
c1667e40 | 131 | ret |= cpuid_1_edx & 0x183f7ff; |
19ccb8ea | 132 | break; |
b827df58 AK |
133 | } |
134 | break; | |
135 | } | |
136 | } | |
137 | } | |
138 | ||
139 | qemu_free(cpuid); | |
140 | ||
141 | return ret; | |
142 | } | |
143 | ||
bb0300dc GN |
144 | #ifdef CONFIG_KVM_PARA |
145 | struct kvm_para_features { | |
b9bec74b JK |
146 | int cap; |
147 | int feature; | |
bb0300dc | 148 | } para_features[] = { |
b9bec74b | 149 | { KVM_CAP_CLOCKSOURCE, KVM_FEATURE_CLOCKSOURCE }, |
b9bec74b | 150 | { KVM_CAP_NOP_IO_DELAY, KVM_FEATURE_NOP_IO_DELAY }, |
b9bec74b | 151 | { KVM_CAP_PV_MMU, KVM_FEATURE_MMU_OP }, |
f6584ee2 | 152 | #ifdef KVM_CAP_ASYNC_PF |
b9bec74b | 153 | { KVM_CAP_ASYNC_PF, KVM_FEATURE_ASYNC_PF }, |
bb0300dc | 154 | #endif |
b9bec74b | 155 | { -1, -1 } |
bb0300dc GN |
156 | }; |
157 | ||
158 | static int get_para_features(CPUState *env) | |
159 | { | |
b9bec74b | 160 | int i, features = 0; |
bb0300dc | 161 | |
b9bec74b JK |
162 | for (i = 0; i < ARRAY_SIZE(para_features) - 1; i++) { |
163 | if (kvm_check_extension(env->kvm_state, para_features[i].cap)) { | |
164 | features |= (1 << para_features[i].feature); | |
bb0300dc | 165 | } |
b9bec74b JK |
166 | } |
167 | return features; | |
bb0300dc GN |
168 | } |
169 | #endif | |
170 | ||
e7701825 MT |
171 | #ifdef KVM_CAP_MCE |
172 | static int kvm_get_mce_cap_supported(KVMState *s, uint64_t *mce_cap, | |
173 | int *max_banks) | |
174 | { | |
175 | int r; | |
176 | ||
14a09518 | 177 | r = kvm_check_extension(s, KVM_CAP_MCE); |
e7701825 MT |
178 | if (r > 0) { |
179 | *max_banks = r; | |
180 | return kvm_ioctl(s, KVM_X86_GET_MCE_CAP_SUPPORTED, mce_cap); | |
181 | } | |
182 | return -ENOSYS; | |
183 | } | |
184 | ||
185 | static int kvm_setup_mce(CPUState *env, uint64_t *mcg_cap) | |
186 | { | |
187 | return kvm_vcpu_ioctl(env, KVM_X86_SETUP_MCE, mcg_cap); | |
188 | } | |
189 | ||
190 | static int kvm_set_mce(CPUState *env, struct kvm_x86_mce *m) | |
191 | { | |
192 | return kvm_vcpu_ioctl(env, KVM_X86_SET_MCE, m); | |
193 | } | |
194 | ||
c0532a76 MT |
195 | static int kvm_get_msr(CPUState *env, struct kvm_msr_entry *msrs, int n) |
196 | { | |
197 | struct kvm_msrs *kmsrs = qemu_malloc(sizeof *kmsrs + n * sizeof *msrs); | |
198 | int r; | |
199 | ||
200 | kmsrs->nmsrs = n; | |
201 | memcpy(kmsrs->entries, msrs, n * sizeof *msrs); | |
202 | r = kvm_vcpu_ioctl(env, KVM_GET_MSRS, kmsrs); | |
203 | memcpy(msrs, kmsrs->entries, n * sizeof *msrs); | |
204 | free(kmsrs); | |
205 | return r; | |
206 | } | |
207 | ||
208 | /* FIXME: kill this and kvm_get_msr, use env->mcg_status instead */ | |
6643e2f0 | 209 | static int kvm_mce_in_progress(CPUState *env) |
c0532a76 MT |
210 | { |
211 | struct kvm_msr_entry msr_mcg_status = { | |
212 | .index = MSR_MCG_STATUS, | |
213 | }; | |
214 | int r; | |
215 | ||
216 | r = kvm_get_msr(env, &msr_mcg_status, 1); | |
217 | if (r == -1 || r == 0) { | |
6643e2f0 JD |
218 | fprintf(stderr, "Failed to get MCE status\n"); |
219 | return 0; | |
c0532a76 MT |
220 | } |
221 | return !!(msr_mcg_status.data & MCG_STATUS_MCIP); | |
222 | } | |
223 | ||
e7701825 MT |
224 | struct kvm_x86_mce_data |
225 | { | |
226 | CPUState *env; | |
227 | struct kvm_x86_mce *mce; | |
c0532a76 | 228 | int abort_on_error; |
e7701825 MT |
229 | }; |
230 | ||
231 | static void kvm_do_inject_x86_mce(void *_data) | |
232 | { | |
233 | struct kvm_x86_mce_data *data = _data; | |
234 | int r; | |
235 | ||
f8502cfb HS |
236 | /* If there is an MCE exception being processed, ignore this SRAO MCE */ |
237 | if ((data->env->mcg_cap & MCG_SER_P) && | |
238 | !(data->mce->status & MCI_STATUS_AR)) { | |
6643e2f0 | 239 | if (kvm_mce_in_progress(data->env)) { |
f8502cfb HS |
240 | return; |
241 | } | |
242 | } | |
c0532a76 | 243 | |
e7701825 | 244 | r = kvm_set_mce(data->env, data->mce); |
c0532a76 | 245 | if (r < 0) { |
e7701825 | 246 | perror("kvm_set_mce FAILED"); |
c0532a76 MT |
247 | if (data->abort_on_error) { |
248 | abort(); | |
249 | } | |
250 | } | |
e7701825 | 251 | } |
31ce5e0c | 252 | |
7cc2cc3e JD |
253 | static void kvm_inject_x86_mce_on(CPUState *env, struct kvm_x86_mce *mce, |
254 | int flag) | |
255 | { | |
256 | struct kvm_x86_mce_data data = { | |
257 | .env = env, | |
258 | .mce = mce, | |
259 | .abort_on_error = (flag & ABORT_ON_ERROR), | |
260 | }; | |
261 | ||
262 | if (!env->mcg_cap) { | |
263 | fprintf(stderr, "MCE support is not enabled!\n"); | |
264 | return; | |
265 | } | |
266 | ||
267 | run_on_cpu(env, kvm_do_inject_x86_mce, &data); | |
268 | } | |
269 | ||
31ce5e0c | 270 | static void kvm_mce_broadcast_rest(CPUState *env); |
e7701825 MT |
271 | #endif |
272 | ||
273 | void kvm_inject_x86_mce(CPUState *cenv, int bank, uint64_t status, | |
c0532a76 | 274 | uint64_t mcg_status, uint64_t addr, uint64_t misc, |
31ce5e0c | 275 | int flag) |
e7701825 MT |
276 | { |
277 | #ifdef KVM_CAP_MCE | |
278 | struct kvm_x86_mce mce = { | |
279 | .bank = bank, | |
280 | .status = status, | |
281 | .mcg_status = mcg_status, | |
282 | .addr = addr, | |
283 | .misc = misc, | |
284 | }; | |
c0532a76 | 285 | |
31ce5e0c JD |
286 | if (flag & MCE_BROADCAST) { |
287 | kvm_mce_broadcast_rest(cenv); | |
288 | } | |
289 | ||
7cc2cc3e | 290 | kvm_inject_x86_mce_on(cenv, &mce, flag); |
c0532a76 | 291 | #else |
31ce5e0c | 292 | if (flag & ABORT_ON_ERROR) { |
c0532a76 | 293 | abort(); |
31ce5e0c | 294 | } |
e7701825 MT |
295 | #endif |
296 | } | |
297 | ||
05330448 AL |
298 | int kvm_arch_init_vcpu(CPUState *env) |
299 | { | |
300 | struct { | |
486bd5a2 AL |
301 | struct kvm_cpuid2 cpuid; |
302 | struct kvm_cpuid_entry2 entries[100]; | |
05330448 | 303 | } __attribute__((packed)) cpuid_data; |
486bd5a2 | 304 | uint32_t limit, i, j, cpuid_i; |
a33609ca | 305 | uint32_t unused; |
bb0300dc | 306 | struct kvm_cpuid_entry2 *c; |
521f0798 | 307 | #ifdef CONFIG_KVM_PARA |
bb0300dc GN |
308 | uint32_t signature[3]; |
309 | #endif | |
05330448 | 310 | |
c958a8bd | 311 | env->cpuid_features &= kvm_arch_get_supported_cpuid(env, 1, 0, R_EDX); |
6c0d7ee8 AP |
312 | |
313 | i = env->cpuid_ext_features & CPUID_EXT_HYPERVISOR; | |
c958a8bd | 314 | env->cpuid_ext_features &= kvm_arch_get_supported_cpuid(env, 1, 0, R_ECX); |
6c0d7ee8 AP |
315 | env->cpuid_ext_features |= i; |
316 | ||
457dfed6 | 317 | env->cpuid_ext2_features &= kvm_arch_get_supported_cpuid(env, 0x80000001, |
c958a8bd | 318 | 0, R_EDX); |
457dfed6 | 319 | env->cpuid_ext3_features &= kvm_arch_get_supported_cpuid(env, 0x80000001, |
c958a8bd | 320 | 0, R_ECX); |
296acb64 JR |
321 | env->cpuid_svm_features &= kvm_arch_get_supported_cpuid(env, 0x8000000A, |
322 | 0, R_EDX); | |
323 | ||
6c1f42fe | 324 | |
05330448 AL |
325 | cpuid_i = 0; |
326 | ||
bb0300dc GN |
327 | #ifdef CONFIG_KVM_PARA |
328 | /* Paravirtualization CPUIDs */ | |
329 | memcpy(signature, "KVMKVMKVM\0\0\0", 12); | |
330 | c = &cpuid_data.entries[cpuid_i++]; | |
331 | memset(c, 0, sizeof(*c)); | |
332 | c->function = KVM_CPUID_SIGNATURE; | |
333 | c->eax = 0; | |
334 | c->ebx = signature[0]; | |
335 | c->ecx = signature[1]; | |
336 | c->edx = signature[2]; | |
337 | ||
338 | c = &cpuid_data.entries[cpuid_i++]; | |
339 | memset(c, 0, sizeof(*c)); | |
340 | c->function = KVM_CPUID_FEATURES; | |
341 | c->eax = env->cpuid_kvm_features & get_para_features(env); | |
342 | #endif | |
343 | ||
a33609ca | 344 | cpu_x86_cpuid(env, 0, 0, &limit, &unused, &unused, &unused); |
05330448 AL |
345 | |
346 | for (i = 0; i <= limit; i++) { | |
bb0300dc | 347 | c = &cpuid_data.entries[cpuid_i++]; |
486bd5a2 AL |
348 | |
349 | switch (i) { | |
a36b1029 AL |
350 | case 2: { |
351 | /* Keep reading function 2 till all the input is received */ | |
352 | int times; | |
353 | ||
a36b1029 | 354 | c->function = i; |
a33609ca AL |
355 | c->flags = KVM_CPUID_FLAG_STATEFUL_FUNC | |
356 | KVM_CPUID_FLAG_STATE_READ_NEXT; | |
357 | cpu_x86_cpuid(env, i, 0, &c->eax, &c->ebx, &c->ecx, &c->edx); | |
358 | times = c->eax & 0xff; | |
a36b1029 AL |
359 | |
360 | for (j = 1; j < times; ++j) { | |
a33609ca | 361 | c = &cpuid_data.entries[cpuid_i++]; |
a36b1029 | 362 | c->function = i; |
a33609ca AL |
363 | c->flags = KVM_CPUID_FLAG_STATEFUL_FUNC; |
364 | cpu_x86_cpuid(env, i, 0, &c->eax, &c->ebx, &c->ecx, &c->edx); | |
a36b1029 AL |
365 | } |
366 | break; | |
367 | } | |
486bd5a2 AL |
368 | case 4: |
369 | case 0xb: | |
370 | case 0xd: | |
371 | for (j = 0; ; j++) { | |
486bd5a2 AL |
372 | c->function = i; |
373 | c->flags = KVM_CPUID_FLAG_SIGNIFCANT_INDEX; | |
374 | c->index = j; | |
a33609ca | 375 | cpu_x86_cpuid(env, i, j, &c->eax, &c->ebx, &c->ecx, &c->edx); |
486bd5a2 | 376 | |
b9bec74b | 377 | if (i == 4 && c->eax == 0) { |
486bd5a2 | 378 | break; |
b9bec74b JK |
379 | } |
380 | if (i == 0xb && !(c->ecx & 0xff00)) { | |
486bd5a2 | 381 | break; |
b9bec74b JK |
382 | } |
383 | if (i == 0xd && c->eax == 0) { | |
486bd5a2 | 384 | break; |
b9bec74b | 385 | } |
a33609ca | 386 | c = &cpuid_data.entries[cpuid_i++]; |
486bd5a2 AL |
387 | } |
388 | break; | |
389 | default: | |
486bd5a2 | 390 | c->function = i; |
a33609ca AL |
391 | c->flags = 0; |
392 | cpu_x86_cpuid(env, i, 0, &c->eax, &c->ebx, &c->ecx, &c->edx); | |
486bd5a2 AL |
393 | break; |
394 | } | |
05330448 | 395 | } |
a33609ca | 396 | cpu_x86_cpuid(env, 0x80000000, 0, &limit, &unused, &unused, &unused); |
05330448 AL |
397 | |
398 | for (i = 0x80000000; i <= limit; i++) { | |
bb0300dc | 399 | c = &cpuid_data.entries[cpuid_i++]; |
05330448 | 400 | |
05330448 | 401 | c->function = i; |
a33609ca AL |
402 | c->flags = 0; |
403 | cpu_x86_cpuid(env, i, 0, &c->eax, &c->ebx, &c->ecx, &c->edx); | |
05330448 AL |
404 | } |
405 | ||
406 | cpuid_data.cpuid.nent = cpuid_i; | |
407 | ||
e7701825 MT |
408 | #ifdef KVM_CAP_MCE |
409 | if (((env->cpuid_version >> 8)&0xF) >= 6 | |
410 | && (env->cpuid_features&(CPUID_MCE|CPUID_MCA)) == (CPUID_MCE|CPUID_MCA) | |
411 | && kvm_check_extension(env->kvm_state, KVM_CAP_MCE) > 0) { | |
412 | uint64_t mcg_cap; | |
413 | int banks; | |
414 | ||
b9bec74b | 415 | if (kvm_get_mce_cap_supported(env->kvm_state, &mcg_cap, &banks)) { |
e7701825 | 416 | perror("kvm_get_mce_cap_supported FAILED"); |
b9bec74b | 417 | } else { |
e7701825 MT |
418 | if (banks > MCE_BANKS_DEF) |
419 | banks = MCE_BANKS_DEF; | |
420 | mcg_cap &= MCE_CAP_DEF; | |
421 | mcg_cap |= banks; | |
b9bec74b | 422 | if (kvm_setup_mce(env, &mcg_cap)) { |
e7701825 | 423 | perror("kvm_setup_mce FAILED"); |
b9bec74b | 424 | } else { |
e7701825 | 425 | env->mcg_cap = mcg_cap; |
b9bec74b | 426 | } |
e7701825 MT |
427 | } |
428 | } | |
429 | #endif | |
430 | ||
486bd5a2 | 431 | return kvm_vcpu_ioctl(env, KVM_SET_CPUID2, &cpuid_data); |
05330448 AL |
432 | } |
433 | ||
caa5af0f JK |
434 | void kvm_arch_reset_vcpu(CPUState *env) |
435 | { | |
e73223a5 | 436 | env->exception_injected = -1; |
0e607a80 | 437 | env->interrupt_injected = -1; |
1a5e9d2f | 438 | env->xcr0 = 1; |
ddced198 MT |
439 | if (kvm_irqchip_in_kernel()) { |
440 | env->mp_state = cpu_is_bsp(env) ? KVM_MP_STATE_RUNNABLE : | |
441 | KVM_MP_STATE_UNINITIALIZED; | |
442 | } else { | |
443 | env->mp_state = KVM_MP_STATE_RUNNABLE; | |
444 | } | |
caa5af0f JK |
445 | } |
446 | ||
c3a3a7d3 | 447 | static int kvm_get_supported_msrs(KVMState *s) |
05330448 | 448 | { |
75b10c43 | 449 | static int kvm_supported_msrs; |
c3a3a7d3 | 450 | int ret = 0; |
05330448 AL |
451 | |
452 | /* first time */ | |
75b10c43 | 453 | if (kvm_supported_msrs == 0) { |
05330448 AL |
454 | struct kvm_msr_list msr_list, *kvm_msr_list; |
455 | ||
75b10c43 | 456 | kvm_supported_msrs = -1; |
05330448 AL |
457 | |
458 | /* Obtain MSR list from KVM. These are the MSRs that we must | |
459 | * save/restore */ | |
4c9f7372 | 460 | msr_list.nmsrs = 0; |
c3a3a7d3 | 461 | ret = kvm_ioctl(s, KVM_GET_MSR_INDEX_LIST, &msr_list); |
6fb6d245 | 462 | if (ret < 0 && ret != -E2BIG) { |
c3a3a7d3 | 463 | return ret; |
6fb6d245 | 464 | } |
d9db889f JK |
465 | /* Old kernel modules had a bug and could write beyond the provided |
466 | memory. Allocate at least a safe amount of 1K. */ | |
467 | kvm_msr_list = qemu_mallocz(MAX(1024, sizeof(msr_list) + | |
468 | msr_list.nmsrs * | |
469 | sizeof(msr_list.indices[0]))); | |
05330448 | 470 | |
55308450 | 471 | kvm_msr_list->nmsrs = msr_list.nmsrs; |
c3a3a7d3 | 472 | ret = kvm_ioctl(s, KVM_GET_MSR_INDEX_LIST, kvm_msr_list); |
05330448 AL |
473 | if (ret >= 0) { |
474 | int i; | |
475 | ||
476 | for (i = 0; i < kvm_msr_list->nmsrs; i++) { | |
477 | if (kvm_msr_list->indices[i] == MSR_STAR) { | |
c3a3a7d3 | 478 | has_msr_star = true; |
75b10c43 MT |
479 | continue; |
480 | } | |
481 | if (kvm_msr_list->indices[i] == MSR_VM_HSAVE_PA) { | |
c3a3a7d3 | 482 | has_msr_hsave_pa = true; |
75b10c43 | 483 | continue; |
05330448 AL |
484 | } |
485 | } | |
486 | } | |
487 | ||
488 | free(kvm_msr_list); | |
489 | } | |
490 | ||
c3a3a7d3 | 491 | return ret; |
05330448 AL |
492 | } |
493 | ||
cad1e282 | 494 | int kvm_arch_init(KVMState *s) |
05330448 | 495 | { |
11076198 | 496 | uint64_t identity_base = 0xfffbc000; |
05330448 | 497 | int ret; |
25d2e361 MT |
498 | struct utsname utsname; |
499 | ||
c3a3a7d3 JK |
500 | ret = kvm_get_supported_msrs(s); |
501 | if (ret < 0) { | |
502 | return ret; | |
503 | } | |
504 | ||
25d2e361 MT |
505 | uname(&utsname); |
506 | lm_capable_kernel = strcmp(utsname.machine, "x86_64") == 0; | |
507 | ||
4c5b10b7 | 508 | /* |
11076198 JK |
509 | * On older Intel CPUs, KVM uses vm86 mode to emulate 16-bit code directly. |
510 | * In order to use vm86 mode, an EPT identity map and a TSS are needed. | |
511 | * Since these must be part of guest physical memory, we need to allocate | |
512 | * them, both by setting their start addresses in the kernel and by | |
513 | * creating a corresponding e820 entry. We need 4 pages before the BIOS. | |
514 | * | |
515 | * Older KVM versions may not support setting the identity map base. In | |
516 | * that case we need to stick with the default, i.e. a 256K maximum BIOS | |
517 | * size. | |
4c5b10b7 | 518 | */ |
11076198 JK |
519 | #ifdef KVM_CAP_SET_IDENTITY_MAP_ADDR |
520 | if (kvm_check_extension(s, KVM_CAP_SET_IDENTITY_MAP_ADDR)) { | |
521 | /* Allows up to 16M BIOSes. */ | |
522 | identity_base = 0xfeffc000; | |
523 | ||
524 | ret = kvm_vm_ioctl(s, KVM_SET_IDENTITY_MAP_ADDR, &identity_base); | |
525 | if (ret < 0) { | |
526 | return ret; | |
527 | } | |
4c5b10b7 | 528 | } |
11076198 JK |
529 | #endif |
530 | /* Set TSS base one page after EPT identity map. */ | |
531 | ret = kvm_vm_ioctl(s, KVM_SET_TSS_ADDR, identity_base + 0x1000); | |
532 | if (ret < 0) { | |
533 | return ret; | |
534 | } | |
535 | ||
536 | /* Tell fw_cfg to notify the BIOS to reserve the range. */ | |
537 | ret = e820_add_entry(identity_base, 0x4000, E820_RESERVED); | |
20420430 | 538 | if (ret < 0) { |
11076198 | 539 | fprintf(stderr, "e820_add_entry() table is full\n"); |
20420430 SY |
540 | return ret; |
541 | } | |
542 | ||
11076198 | 543 | return 0; |
05330448 | 544 | } |
b9bec74b | 545 | |
05330448 AL |
546 | static void set_v8086_seg(struct kvm_segment *lhs, const SegmentCache *rhs) |
547 | { | |
548 | lhs->selector = rhs->selector; | |
549 | lhs->base = rhs->base; | |
550 | lhs->limit = rhs->limit; | |
551 | lhs->type = 3; | |
552 | lhs->present = 1; | |
553 | lhs->dpl = 3; | |
554 | lhs->db = 0; | |
555 | lhs->s = 1; | |
556 | lhs->l = 0; | |
557 | lhs->g = 0; | |
558 | lhs->avl = 0; | |
559 | lhs->unusable = 0; | |
560 | } | |
561 | ||
562 | static void set_seg(struct kvm_segment *lhs, const SegmentCache *rhs) | |
563 | { | |
564 | unsigned flags = rhs->flags; | |
565 | lhs->selector = rhs->selector; | |
566 | lhs->base = rhs->base; | |
567 | lhs->limit = rhs->limit; | |
568 | lhs->type = (flags >> DESC_TYPE_SHIFT) & 15; | |
569 | lhs->present = (flags & DESC_P_MASK) != 0; | |
acaa7550 | 570 | lhs->dpl = (flags >> DESC_DPL_SHIFT) & 3; |
05330448 AL |
571 | lhs->db = (flags >> DESC_B_SHIFT) & 1; |
572 | lhs->s = (flags & DESC_S_MASK) != 0; | |
573 | lhs->l = (flags >> DESC_L_SHIFT) & 1; | |
574 | lhs->g = (flags & DESC_G_MASK) != 0; | |
575 | lhs->avl = (flags & DESC_AVL_MASK) != 0; | |
576 | lhs->unusable = 0; | |
577 | } | |
578 | ||
579 | static void get_seg(SegmentCache *lhs, const struct kvm_segment *rhs) | |
580 | { | |
581 | lhs->selector = rhs->selector; | |
582 | lhs->base = rhs->base; | |
583 | lhs->limit = rhs->limit; | |
b9bec74b JK |
584 | lhs->flags = (rhs->type << DESC_TYPE_SHIFT) | |
585 | (rhs->present * DESC_P_MASK) | | |
586 | (rhs->dpl << DESC_DPL_SHIFT) | | |
587 | (rhs->db << DESC_B_SHIFT) | | |
588 | (rhs->s * DESC_S_MASK) | | |
589 | (rhs->l << DESC_L_SHIFT) | | |
590 | (rhs->g * DESC_G_MASK) | | |
591 | (rhs->avl * DESC_AVL_MASK); | |
05330448 AL |
592 | } |
593 | ||
594 | static void kvm_getput_reg(__u64 *kvm_reg, target_ulong *qemu_reg, int set) | |
595 | { | |
b9bec74b | 596 | if (set) { |
05330448 | 597 | *kvm_reg = *qemu_reg; |
b9bec74b | 598 | } else { |
05330448 | 599 | *qemu_reg = *kvm_reg; |
b9bec74b | 600 | } |
05330448 AL |
601 | } |
602 | ||
603 | static int kvm_getput_regs(CPUState *env, int set) | |
604 | { | |
605 | struct kvm_regs regs; | |
606 | int ret = 0; | |
607 | ||
608 | if (!set) { | |
609 | ret = kvm_vcpu_ioctl(env, KVM_GET_REGS, ®s); | |
b9bec74b | 610 | if (ret < 0) { |
05330448 | 611 | return ret; |
b9bec74b | 612 | } |
05330448 AL |
613 | } |
614 | ||
615 | kvm_getput_reg(®s.rax, &env->regs[R_EAX], set); | |
616 | kvm_getput_reg(®s.rbx, &env->regs[R_EBX], set); | |
617 | kvm_getput_reg(®s.rcx, &env->regs[R_ECX], set); | |
618 | kvm_getput_reg(®s.rdx, &env->regs[R_EDX], set); | |
619 | kvm_getput_reg(®s.rsi, &env->regs[R_ESI], set); | |
620 | kvm_getput_reg(®s.rdi, &env->regs[R_EDI], set); | |
621 | kvm_getput_reg(®s.rsp, &env->regs[R_ESP], set); | |
622 | kvm_getput_reg(®s.rbp, &env->regs[R_EBP], set); | |
623 | #ifdef TARGET_X86_64 | |
624 | kvm_getput_reg(®s.r8, &env->regs[8], set); | |
625 | kvm_getput_reg(®s.r9, &env->regs[9], set); | |
626 | kvm_getput_reg(®s.r10, &env->regs[10], set); | |
627 | kvm_getput_reg(®s.r11, &env->regs[11], set); | |
628 | kvm_getput_reg(®s.r12, &env->regs[12], set); | |
629 | kvm_getput_reg(®s.r13, &env->regs[13], set); | |
630 | kvm_getput_reg(®s.r14, &env->regs[14], set); | |
631 | kvm_getput_reg(®s.r15, &env->regs[15], set); | |
632 | #endif | |
633 | ||
634 | kvm_getput_reg(®s.rflags, &env->eflags, set); | |
635 | kvm_getput_reg(®s.rip, &env->eip, set); | |
636 | ||
b9bec74b | 637 | if (set) { |
05330448 | 638 | ret = kvm_vcpu_ioctl(env, KVM_SET_REGS, ®s); |
b9bec74b | 639 | } |
05330448 AL |
640 | |
641 | return ret; | |
642 | } | |
643 | ||
644 | static int kvm_put_fpu(CPUState *env) | |
645 | { | |
646 | struct kvm_fpu fpu; | |
647 | int i; | |
648 | ||
649 | memset(&fpu, 0, sizeof fpu); | |
650 | fpu.fsw = env->fpus & ~(7 << 11); | |
651 | fpu.fsw |= (env->fpstt & 7) << 11; | |
652 | fpu.fcw = env->fpuc; | |
b9bec74b JK |
653 | for (i = 0; i < 8; ++i) { |
654 | fpu.ftwx |= (!env->fptags[i]) << i; | |
655 | } | |
05330448 AL |
656 | memcpy(fpu.fpr, env->fpregs, sizeof env->fpregs); |
657 | memcpy(fpu.xmm, env->xmm_regs, sizeof env->xmm_regs); | |
658 | fpu.mxcsr = env->mxcsr; | |
659 | ||
660 | return kvm_vcpu_ioctl(env, KVM_SET_FPU, &fpu); | |
661 | } | |
662 | ||
f1665b21 SY |
663 | #ifdef KVM_CAP_XSAVE |
664 | #define XSAVE_CWD_RIP 2 | |
665 | #define XSAVE_CWD_RDP 4 | |
666 | #define XSAVE_MXCSR 6 | |
667 | #define XSAVE_ST_SPACE 8 | |
668 | #define XSAVE_XMM_SPACE 40 | |
669 | #define XSAVE_XSTATE_BV 128 | |
670 | #define XSAVE_YMMH_SPACE 144 | |
671 | #endif | |
672 | ||
673 | static int kvm_put_xsave(CPUState *env) | |
674 | { | |
675 | #ifdef KVM_CAP_XSAVE | |
0f53994f | 676 | int i, r; |
f1665b21 SY |
677 | struct kvm_xsave* xsave; |
678 | uint16_t cwd, swd, twd, fop; | |
679 | ||
b9bec74b | 680 | if (!kvm_has_xsave()) { |
f1665b21 | 681 | return kvm_put_fpu(env); |
b9bec74b | 682 | } |
f1665b21 SY |
683 | |
684 | xsave = qemu_memalign(4096, sizeof(struct kvm_xsave)); | |
685 | memset(xsave, 0, sizeof(struct kvm_xsave)); | |
686 | cwd = swd = twd = fop = 0; | |
687 | swd = env->fpus & ~(7 << 11); | |
688 | swd |= (env->fpstt & 7) << 11; | |
689 | cwd = env->fpuc; | |
b9bec74b | 690 | for (i = 0; i < 8; ++i) { |
f1665b21 | 691 | twd |= (!env->fptags[i]) << i; |
b9bec74b | 692 | } |
f1665b21 SY |
693 | xsave->region[0] = (uint32_t)(swd << 16) + cwd; |
694 | xsave->region[1] = (uint32_t)(fop << 16) + twd; | |
695 | memcpy(&xsave->region[XSAVE_ST_SPACE], env->fpregs, | |
696 | sizeof env->fpregs); | |
697 | memcpy(&xsave->region[XSAVE_XMM_SPACE], env->xmm_regs, | |
698 | sizeof env->xmm_regs); | |
699 | xsave->region[XSAVE_MXCSR] = env->mxcsr; | |
700 | *(uint64_t *)&xsave->region[XSAVE_XSTATE_BV] = env->xstate_bv; | |
701 | memcpy(&xsave->region[XSAVE_YMMH_SPACE], env->ymmh_regs, | |
702 | sizeof env->ymmh_regs); | |
0f53994f MT |
703 | r = kvm_vcpu_ioctl(env, KVM_SET_XSAVE, xsave); |
704 | qemu_free(xsave); | |
705 | return r; | |
f1665b21 SY |
706 | #else |
707 | return kvm_put_fpu(env); | |
708 | #endif | |
709 | } | |
710 | ||
711 | static int kvm_put_xcrs(CPUState *env) | |
712 | { | |
713 | #ifdef KVM_CAP_XCRS | |
714 | struct kvm_xcrs xcrs; | |
715 | ||
b9bec74b | 716 | if (!kvm_has_xcrs()) { |
f1665b21 | 717 | return 0; |
b9bec74b | 718 | } |
f1665b21 SY |
719 | |
720 | xcrs.nr_xcrs = 1; | |
721 | xcrs.flags = 0; | |
722 | xcrs.xcrs[0].xcr = 0; | |
723 | xcrs.xcrs[0].value = env->xcr0; | |
724 | return kvm_vcpu_ioctl(env, KVM_SET_XCRS, &xcrs); | |
725 | #else | |
726 | return 0; | |
727 | #endif | |
728 | } | |
729 | ||
05330448 AL |
730 | static int kvm_put_sregs(CPUState *env) |
731 | { | |
732 | struct kvm_sregs sregs; | |
733 | ||
0e607a80 JK |
734 | memset(sregs.interrupt_bitmap, 0, sizeof(sregs.interrupt_bitmap)); |
735 | if (env->interrupt_injected >= 0) { | |
736 | sregs.interrupt_bitmap[env->interrupt_injected / 64] |= | |
737 | (uint64_t)1 << (env->interrupt_injected % 64); | |
738 | } | |
05330448 AL |
739 | |
740 | if ((env->eflags & VM_MASK)) { | |
b9bec74b JK |
741 | set_v8086_seg(&sregs.cs, &env->segs[R_CS]); |
742 | set_v8086_seg(&sregs.ds, &env->segs[R_DS]); | |
743 | set_v8086_seg(&sregs.es, &env->segs[R_ES]); | |
744 | set_v8086_seg(&sregs.fs, &env->segs[R_FS]); | |
745 | set_v8086_seg(&sregs.gs, &env->segs[R_GS]); | |
746 | set_v8086_seg(&sregs.ss, &env->segs[R_SS]); | |
05330448 | 747 | } else { |
b9bec74b JK |
748 | set_seg(&sregs.cs, &env->segs[R_CS]); |
749 | set_seg(&sregs.ds, &env->segs[R_DS]); | |
750 | set_seg(&sregs.es, &env->segs[R_ES]); | |
751 | set_seg(&sregs.fs, &env->segs[R_FS]); | |
752 | set_seg(&sregs.gs, &env->segs[R_GS]); | |
753 | set_seg(&sregs.ss, &env->segs[R_SS]); | |
05330448 AL |
754 | } |
755 | ||
756 | set_seg(&sregs.tr, &env->tr); | |
757 | set_seg(&sregs.ldt, &env->ldt); | |
758 | ||
759 | sregs.idt.limit = env->idt.limit; | |
760 | sregs.idt.base = env->idt.base; | |
761 | sregs.gdt.limit = env->gdt.limit; | |
762 | sregs.gdt.base = env->gdt.base; | |
763 | ||
764 | sregs.cr0 = env->cr[0]; | |
765 | sregs.cr2 = env->cr[2]; | |
766 | sregs.cr3 = env->cr[3]; | |
767 | sregs.cr4 = env->cr[4]; | |
768 | ||
4a942cea BS |
769 | sregs.cr8 = cpu_get_apic_tpr(env->apic_state); |
770 | sregs.apic_base = cpu_get_apic_base(env->apic_state); | |
05330448 AL |
771 | |
772 | sregs.efer = env->efer; | |
773 | ||
774 | return kvm_vcpu_ioctl(env, KVM_SET_SREGS, &sregs); | |
775 | } | |
776 | ||
777 | static void kvm_msr_entry_set(struct kvm_msr_entry *entry, | |
778 | uint32_t index, uint64_t value) | |
779 | { | |
780 | entry->index = index; | |
781 | entry->data = value; | |
782 | } | |
783 | ||
ea643051 | 784 | static int kvm_put_msrs(CPUState *env, int level) |
05330448 AL |
785 | { |
786 | struct { | |
787 | struct kvm_msrs info; | |
788 | struct kvm_msr_entry entries[100]; | |
789 | } msr_data; | |
790 | struct kvm_msr_entry *msrs = msr_data.entries; | |
d8da8574 | 791 | int n = 0; |
05330448 AL |
792 | |
793 | kvm_msr_entry_set(&msrs[n++], MSR_IA32_SYSENTER_CS, env->sysenter_cs); | |
794 | kvm_msr_entry_set(&msrs[n++], MSR_IA32_SYSENTER_ESP, env->sysenter_esp); | |
795 | kvm_msr_entry_set(&msrs[n++], MSR_IA32_SYSENTER_EIP, env->sysenter_eip); | |
c3a3a7d3 | 796 | if (has_msr_star) { |
b9bec74b JK |
797 | kvm_msr_entry_set(&msrs[n++], MSR_STAR, env->star); |
798 | } | |
c3a3a7d3 | 799 | if (has_msr_hsave_pa) { |
75b10c43 | 800 | kvm_msr_entry_set(&msrs[n++], MSR_VM_HSAVE_PA, env->vm_hsave); |
b9bec74b | 801 | } |
05330448 | 802 | #ifdef TARGET_X86_64 |
25d2e361 MT |
803 | if (lm_capable_kernel) { |
804 | kvm_msr_entry_set(&msrs[n++], MSR_CSTAR, env->cstar); | |
805 | kvm_msr_entry_set(&msrs[n++], MSR_KERNELGSBASE, env->kernelgsbase); | |
806 | kvm_msr_entry_set(&msrs[n++], MSR_FMASK, env->fmask); | |
807 | kvm_msr_entry_set(&msrs[n++], MSR_LSTAR, env->lstar); | |
808 | } | |
05330448 | 809 | #endif |
ea643051 | 810 | if (level == KVM_PUT_FULL_STATE) { |
384331a6 MT |
811 | /* |
812 | * KVM is yet unable to synchronize TSC values of multiple VCPUs on | |
813 | * writeback. Until this is fixed, we only write the offset to SMP | |
814 | * guests after migration, desynchronizing the VCPUs, but avoiding | |
815 | * huge jump-backs that would occur without any writeback at all. | |
816 | */ | |
817 | if (smp_cpus == 1 || env->tsc != 0) { | |
818 | kvm_msr_entry_set(&msrs[n++], MSR_IA32_TSC, env->tsc); | |
819 | } | |
ff5c186b JK |
820 | } |
821 | /* | |
822 | * The following paravirtual MSRs have side effects on the guest or are | |
823 | * too heavy for normal writeback. Limit them to reset or full state | |
824 | * updates. | |
825 | */ | |
826 | if (level >= KVM_PUT_RESET_STATE) { | |
ea643051 JK |
827 | kvm_msr_entry_set(&msrs[n++], MSR_KVM_SYSTEM_TIME, |
828 | env->system_time_msr); | |
829 | kvm_msr_entry_set(&msrs[n++], MSR_KVM_WALL_CLOCK, env->wall_clock_msr); | |
521f0798 | 830 | #if defined(CONFIG_KVM_PARA) && defined(KVM_CAP_ASYNC_PF) |
f6584ee2 GN |
831 | kvm_msr_entry_set(&msrs[n++], MSR_KVM_ASYNC_PF_EN, env->async_pf_en_msr); |
832 | #endif | |
ea643051 | 833 | } |
57780495 MT |
834 | #ifdef KVM_CAP_MCE |
835 | if (env->mcg_cap) { | |
d8da8574 | 836 | int i; |
b9bec74b JK |
837 | |
838 | if (level == KVM_PUT_RESET_STATE) { | |
57780495 | 839 | kvm_msr_entry_set(&msrs[n++], MSR_MCG_STATUS, env->mcg_status); |
b9bec74b | 840 | } else if (level == KVM_PUT_FULL_STATE) { |
57780495 MT |
841 | kvm_msr_entry_set(&msrs[n++], MSR_MCG_STATUS, env->mcg_status); |
842 | kvm_msr_entry_set(&msrs[n++], MSR_MCG_CTL, env->mcg_ctl); | |
b9bec74b | 843 | for (i = 0; i < (env->mcg_cap & 0xff) * 4; i++) { |
57780495 | 844 | kvm_msr_entry_set(&msrs[n++], MSR_MC0_CTL + i, env->mce_banks[i]); |
b9bec74b | 845 | } |
57780495 MT |
846 | } |
847 | } | |
848 | #endif | |
1a03675d | 849 | |
05330448 AL |
850 | msr_data.info.nmsrs = n; |
851 | ||
852 | return kvm_vcpu_ioctl(env, KVM_SET_MSRS, &msr_data); | |
853 | ||
854 | } | |
855 | ||
856 | ||
857 | static int kvm_get_fpu(CPUState *env) | |
858 | { | |
859 | struct kvm_fpu fpu; | |
860 | int i, ret; | |
861 | ||
862 | ret = kvm_vcpu_ioctl(env, KVM_GET_FPU, &fpu); | |
b9bec74b | 863 | if (ret < 0) { |
05330448 | 864 | return ret; |
b9bec74b | 865 | } |
05330448 AL |
866 | |
867 | env->fpstt = (fpu.fsw >> 11) & 7; | |
868 | env->fpus = fpu.fsw; | |
869 | env->fpuc = fpu.fcw; | |
b9bec74b JK |
870 | for (i = 0; i < 8; ++i) { |
871 | env->fptags[i] = !((fpu.ftwx >> i) & 1); | |
872 | } | |
05330448 AL |
873 | memcpy(env->fpregs, fpu.fpr, sizeof env->fpregs); |
874 | memcpy(env->xmm_regs, fpu.xmm, sizeof env->xmm_regs); | |
875 | env->mxcsr = fpu.mxcsr; | |
876 | ||
877 | return 0; | |
878 | } | |
879 | ||
f1665b21 SY |
880 | static int kvm_get_xsave(CPUState *env) |
881 | { | |
882 | #ifdef KVM_CAP_XSAVE | |
883 | struct kvm_xsave* xsave; | |
884 | int ret, i; | |
885 | uint16_t cwd, swd, twd, fop; | |
886 | ||
b9bec74b | 887 | if (!kvm_has_xsave()) { |
f1665b21 | 888 | return kvm_get_fpu(env); |
b9bec74b | 889 | } |
f1665b21 SY |
890 | |
891 | xsave = qemu_memalign(4096, sizeof(struct kvm_xsave)); | |
892 | ret = kvm_vcpu_ioctl(env, KVM_GET_XSAVE, xsave); | |
0f53994f MT |
893 | if (ret < 0) { |
894 | qemu_free(xsave); | |
f1665b21 | 895 | return ret; |
0f53994f | 896 | } |
f1665b21 SY |
897 | |
898 | cwd = (uint16_t)xsave->region[0]; | |
899 | swd = (uint16_t)(xsave->region[0] >> 16); | |
900 | twd = (uint16_t)xsave->region[1]; | |
901 | fop = (uint16_t)(xsave->region[1] >> 16); | |
902 | env->fpstt = (swd >> 11) & 7; | |
903 | env->fpus = swd; | |
904 | env->fpuc = cwd; | |
b9bec74b | 905 | for (i = 0; i < 8; ++i) { |
f1665b21 | 906 | env->fptags[i] = !((twd >> i) & 1); |
b9bec74b | 907 | } |
f1665b21 SY |
908 | env->mxcsr = xsave->region[XSAVE_MXCSR]; |
909 | memcpy(env->fpregs, &xsave->region[XSAVE_ST_SPACE], | |
910 | sizeof env->fpregs); | |
911 | memcpy(env->xmm_regs, &xsave->region[XSAVE_XMM_SPACE], | |
912 | sizeof env->xmm_regs); | |
913 | env->xstate_bv = *(uint64_t *)&xsave->region[XSAVE_XSTATE_BV]; | |
914 | memcpy(env->ymmh_regs, &xsave->region[XSAVE_YMMH_SPACE], | |
915 | sizeof env->ymmh_regs); | |
0f53994f | 916 | qemu_free(xsave); |
f1665b21 SY |
917 | return 0; |
918 | #else | |
919 | return kvm_get_fpu(env); | |
920 | #endif | |
921 | } | |
922 | ||
923 | static int kvm_get_xcrs(CPUState *env) | |
924 | { | |
925 | #ifdef KVM_CAP_XCRS | |
926 | int i, ret; | |
927 | struct kvm_xcrs xcrs; | |
928 | ||
b9bec74b | 929 | if (!kvm_has_xcrs()) { |
f1665b21 | 930 | return 0; |
b9bec74b | 931 | } |
f1665b21 SY |
932 | |
933 | ret = kvm_vcpu_ioctl(env, KVM_GET_XCRS, &xcrs); | |
b9bec74b | 934 | if (ret < 0) { |
f1665b21 | 935 | return ret; |
b9bec74b | 936 | } |
f1665b21 | 937 | |
b9bec74b | 938 | for (i = 0; i < xcrs.nr_xcrs; i++) { |
f1665b21 SY |
939 | /* Only support xcr0 now */ |
940 | if (xcrs.xcrs[0].xcr == 0) { | |
941 | env->xcr0 = xcrs.xcrs[0].value; | |
942 | break; | |
943 | } | |
b9bec74b | 944 | } |
f1665b21 SY |
945 | return 0; |
946 | #else | |
947 | return 0; | |
948 | #endif | |
949 | } | |
950 | ||
05330448 AL |
951 | static int kvm_get_sregs(CPUState *env) |
952 | { | |
953 | struct kvm_sregs sregs; | |
954 | uint32_t hflags; | |
0e607a80 | 955 | int bit, i, ret; |
05330448 AL |
956 | |
957 | ret = kvm_vcpu_ioctl(env, KVM_GET_SREGS, &sregs); | |
b9bec74b | 958 | if (ret < 0) { |
05330448 | 959 | return ret; |
b9bec74b | 960 | } |
05330448 | 961 | |
0e607a80 JK |
962 | /* There can only be one pending IRQ set in the bitmap at a time, so try |
963 | to find it and save its number instead (-1 for none). */ | |
964 | env->interrupt_injected = -1; | |
965 | for (i = 0; i < ARRAY_SIZE(sregs.interrupt_bitmap); i++) { | |
966 | if (sregs.interrupt_bitmap[i]) { | |
967 | bit = ctz64(sregs.interrupt_bitmap[i]); | |
968 | env->interrupt_injected = i * 64 + bit; | |
969 | break; | |
970 | } | |
971 | } | |
05330448 AL |
972 | |
973 | get_seg(&env->segs[R_CS], &sregs.cs); | |
974 | get_seg(&env->segs[R_DS], &sregs.ds); | |
975 | get_seg(&env->segs[R_ES], &sregs.es); | |
976 | get_seg(&env->segs[R_FS], &sregs.fs); | |
977 | get_seg(&env->segs[R_GS], &sregs.gs); | |
978 | get_seg(&env->segs[R_SS], &sregs.ss); | |
979 | ||
980 | get_seg(&env->tr, &sregs.tr); | |
981 | get_seg(&env->ldt, &sregs.ldt); | |
982 | ||
983 | env->idt.limit = sregs.idt.limit; | |
984 | env->idt.base = sregs.idt.base; | |
985 | env->gdt.limit = sregs.gdt.limit; | |
986 | env->gdt.base = sregs.gdt.base; | |
987 | ||
988 | env->cr[0] = sregs.cr0; | |
989 | env->cr[2] = sregs.cr2; | |
990 | env->cr[3] = sregs.cr3; | |
991 | env->cr[4] = sregs.cr4; | |
992 | ||
4a942cea | 993 | cpu_set_apic_base(env->apic_state, sregs.apic_base); |
05330448 AL |
994 | |
995 | env->efer = sregs.efer; | |
4a942cea | 996 | //cpu_set_apic_tpr(env->apic_state, sregs.cr8); |
05330448 | 997 | |
b9bec74b JK |
998 | #define HFLAG_COPY_MASK \ |
999 | ~( HF_CPL_MASK | HF_PE_MASK | HF_MP_MASK | HF_EM_MASK | \ | |
1000 | HF_TS_MASK | HF_TF_MASK | HF_VM_MASK | HF_IOPL_MASK | \ | |
1001 | HF_OSFXSR_MASK | HF_LMA_MASK | HF_CS32_MASK | \ | |
1002 | HF_SS32_MASK | HF_CS64_MASK | HF_ADDSEG_MASK) | |
05330448 AL |
1003 | |
1004 | hflags = (env->segs[R_CS].flags >> DESC_DPL_SHIFT) & HF_CPL_MASK; | |
1005 | hflags |= (env->cr[0] & CR0_PE_MASK) << (HF_PE_SHIFT - CR0_PE_SHIFT); | |
1006 | hflags |= (env->cr[0] << (HF_MP_SHIFT - CR0_MP_SHIFT)) & | |
b9bec74b | 1007 | (HF_MP_MASK | HF_EM_MASK | HF_TS_MASK); |
05330448 AL |
1008 | hflags |= (env->eflags & (HF_TF_MASK | HF_VM_MASK | HF_IOPL_MASK)); |
1009 | hflags |= (env->cr[4] & CR4_OSFXSR_MASK) << | |
b9bec74b | 1010 | (HF_OSFXSR_SHIFT - CR4_OSFXSR_SHIFT); |
05330448 AL |
1011 | |
1012 | if (env->efer & MSR_EFER_LMA) { | |
1013 | hflags |= HF_LMA_MASK; | |
1014 | } | |
1015 | ||
1016 | if ((hflags & HF_LMA_MASK) && (env->segs[R_CS].flags & DESC_L_MASK)) { | |
1017 | hflags |= HF_CS32_MASK | HF_SS32_MASK | HF_CS64_MASK; | |
1018 | } else { | |
1019 | hflags |= (env->segs[R_CS].flags & DESC_B_MASK) >> | |
b9bec74b | 1020 | (DESC_B_SHIFT - HF_CS32_SHIFT); |
05330448 | 1021 | hflags |= (env->segs[R_SS].flags & DESC_B_MASK) >> |
b9bec74b JK |
1022 | (DESC_B_SHIFT - HF_SS32_SHIFT); |
1023 | if (!(env->cr[0] & CR0_PE_MASK) || (env->eflags & VM_MASK) || | |
1024 | !(hflags & HF_CS32_MASK)) { | |
1025 | hflags |= HF_ADDSEG_MASK; | |
1026 | } else { | |
1027 | hflags |= ((env->segs[R_DS].base | env->segs[R_ES].base | | |
1028 | env->segs[R_SS].base) != 0) << HF_ADDSEG_SHIFT; | |
1029 | } | |
05330448 AL |
1030 | } |
1031 | env->hflags = (env->hflags & HFLAG_COPY_MASK) | hflags; | |
05330448 AL |
1032 | |
1033 | return 0; | |
1034 | } | |
1035 | ||
1036 | static int kvm_get_msrs(CPUState *env) | |
1037 | { | |
1038 | struct { | |
1039 | struct kvm_msrs info; | |
1040 | struct kvm_msr_entry entries[100]; | |
1041 | } msr_data; | |
1042 | struct kvm_msr_entry *msrs = msr_data.entries; | |
1043 | int ret, i, n; | |
1044 | ||
1045 | n = 0; | |
1046 | msrs[n++].index = MSR_IA32_SYSENTER_CS; | |
1047 | msrs[n++].index = MSR_IA32_SYSENTER_ESP; | |
1048 | msrs[n++].index = MSR_IA32_SYSENTER_EIP; | |
c3a3a7d3 | 1049 | if (has_msr_star) { |
b9bec74b JK |
1050 | msrs[n++].index = MSR_STAR; |
1051 | } | |
c3a3a7d3 | 1052 | if (has_msr_hsave_pa) { |
75b10c43 | 1053 | msrs[n++].index = MSR_VM_HSAVE_PA; |
b9bec74b | 1054 | } |
05330448 AL |
1055 | msrs[n++].index = MSR_IA32_TSC; |
1056 | #ifdef TARGET_X86_64 | |
25d2e361 MT |
1057 | if (lm_capable_kernel) { |
1058 | msrs[n++].index = MSR_CSTAR; | |
1059 | msrs[n++].index = MSR_KERNELGSBASE; | |
1060 | msrs[n++].index = MSR_FMASK; | |
1061 | msrs[n++].index = MSR_LSTAR; | |
1062 | } | |
05330448 | 1063 | #endif |
1a03675d GC |
1064 | msrs[n++].index = MSR_KVM_SYSTEM_TIME; |
1065 | msrs[n++].index = MSR_KVM_WALL_CLOCK; | |
521f0798 | 1066 | #if defined(CONFIG_KVM_PARA) && defined(KVM_CAP_ASYNC_PF) |
f6584ee2 GN |
1067 | msrs[n++].index = MSR_KVM_ASYNC_PF_EN; |
1068 | #endif | |
1a03675d | 1069 | |
57780495 MT |
1070 | #ifdef KVM_CAP_MCE |
1071 | if (env->mcg_cap) { | |
1072 | msrs[n++].index = MSR_MCG_STATUS; | |
1073 | msrs[n++].index = MSR_MCG_CTL; | |
b9bec74b | 1074 | for (i = 0; i < (env->mcg_cap & 0xff) * 4; i++) { |
57780495 | 1075 | msrs[n++].index = MSR_MC0_CTL + i; |
b9bec74b | 1076 | } |
57780495 MT |
1077 | } |
1078 | #endif | |
1079 | ||
05330448 AL |
1080 | msr_data.info.nmsrs = n; |
1081 | ret = kvm_vcpu_ioctl(env, KVM_GET_MSRS, &msr_data); | |
b9bec74b | 1082 | if (ret < 0) { |
05330448 | 1083 | return ret; |
b9bec74b | 1084 | } |
05330448 AL |
1085 | |
1086 | for (i = 0; i < ret; i++) { | |
1087 | switch (msrs[i].index) { | |
1088 | case MSR_IA32_SYSENTER_CS: | |
1089 | env->sysenter_cs = msrs[i].data; | |
1090 | break; | |
1091 | case MSR_IA32_SYSENTER_ESP: | |
1092 | env->sysenter_esp = msrs[i].data; | |
1093 | break; | |
1094 | case MSR_IA32_SYSENTER_EIP: | |
1095 | env->sysenter_eip = msrs[i].data; | |
1096 | break; | |
1097 | case MSR_STAR: | |
1098 | env->star = msrs[i].data; | |
1099 | break; | |
1100 | #ifdef TARGET_X86_64 | |
1101 | case MSR_CSTAR: | |
1102 | env->cstar = msrs[i].data; | |
1103 | break; | |
1104 | case MSR_KERNELGSBASE: | |
1105 | env->kernelgsbase = msrs[i].data; | |
1106 | break; | |
1107 | case MSR_FMASK: | |
1108 | env->fmask = msrs[i].data; | |
1109 | break; | |
1110 | case MSR_LSTAR: | |
1111 | env->lstar = msrs[i].data; | |
1112 | break; | |
1113 | #endif | |
1114 | case MSR_IA32_TSC: | |
1115 | env->tsc = msrs[i].data; | |
1116 | break; | |
aa851e36 MT |
1117 | case MSR_VM_HSAVE_PA: |
1118 | env->vm_hsave = msrs[i].data; | |
1119 | break; | |
1a03675d GC |
1120 | case MSR_KVM_SYSTEM_TIME: |
1121 | env->system_time_msr = msrs[i].data; | |
1122 | break; | |
1123 | case MSR_KVM_WALL_CLOCK: | |
1124 | env->wall_clock_msr = msrs[i].data; | |
1125 | break; | |
57780495 MT |
1126 | #ifdef KVM_CAP_MCE |
1127 | case MSR_MCG_STATUS: | |
1128 | env->mcg_status = msrs[i].data; | |
1129 | break; | |
1130 | case MSR_MCG_CTL: | |
1131 | env->mcg_ctl = msrs[i].data; | |
1132 | break; | |
1133 | #endif | |
1134 | default: | |
1135 | #ifdef KVM_CAP_MCE | |
1136 | if (msrs[i].index >= MSR_MC0_CTL && | |
1137 | msrs[i].index < MSR_MC0_CTL + (env->mcg_cap & 0xff) * 4) { | |
1138 | env->mce_banks[msrs[i].index - MSR_MC0_CTL] = msrs[i].data; | |
57780495 MT |
1139 | } |
1140 | #endif | |
d8da8574 | 1141 | break; |
521f0798 | 1142 | #if defined(CONFIG_KVM_PARA) && defined(KVM_CAP_ASYNC_PF) |
f6584ee2 GN |
1143 | case MSR_KVM_ASYNC_PF_EN: |
1144 | env->async_pf_en_msr = msrs[i].data; | |
1145 | break; | |
1146 | #endif | |
05330448 AL |
1147 | } |
1148 | } | |
1149 | ||
1150 | return 0; | |
1151 | } | |
1152 | ||
9bdbe550 HB |
1153 | static int kvm_put_mp_state(CPUState *env) |
1154 | { | |
1155 | struct kvm_mp_state mp_state = { .mp_state = env->mp_state }; | |
1156 | ||
1157 | return kvm_vcpu_ioctl(env, KVM_SET_MP_STATE, &mp_state); | |
1158 | } | |
1159 | ||
1160 | static int kvm_get_mp_state(CPUState *env) | |
1161 | { | |
1162 | struct kvm_mp_state mp_state; | |
1163 | int ret; | |
1164 | ||
1165 | ret = kvm_vcpu_ioctl(env, KVM_GET_MP_STATE, &mp_state); | |
1166 | if (ret < 0) { | |
1167 | return ret; | |
1168 | } | |
1169 | env->mp_state = mp_state.mp_state; | |
c14750e8 JK |
1170 | if (kvm_irqchip_in_kernel()) { |
1171 | env->halted = (mp_state.mp_state == KVM_MP_STATE_HALTED); | |
1172 | } | |
9bdbe550 HB |
1173 | return 0; |
1174 | } | |
1175 | ||
ea643051 | 1176 | static int kvm_put_vcpu_events(CPUState *env, int level) |
a0fb002c JK |
1177 | { |
1178 | #ifdef KVM_CAP_VCPU_EVENTS | |
1179 | struct kvm_vcpu_events events; | |
1180 | ||
1181 | if (!kvm_has_vcpu_events()) { | |
1182 | return 0; | |
1183 | } | |
1184 | ||
31827373 JK |
1185 | events.exception.injected = (env->exception_injected >= 0); |
1186 | events.exception.nr = env->exception_injected; | |
a0fb002c JK |
1187 | events.exception.has_error_code = env->has_error_code; |
1188 | events.exception.error_code = env->error_code; | |
1189 | ||
1190 | events.interrupt.injected = (env->interrupt_injected >= 0); | |
1191 | events.interrupt.nr = env->interrupt_injected; | |
1192 | events.interrupt.soft = env->soft_interrupt; | |
1193 | ||
1194 | events.nmi.injected = env->nmi_injected; | |
1195 | events.nmi.pending = env->nmi_pending; | |
1196 | events.nmi.masked = !!(env->hflags2 & HF2_NMI_MASK); | |
1197 | ||
1198 | events.sipi_vector = env->sipi_vector; | |
1199 | ||
ea643051 JK |
1200 | events.flags = 0; |
1201 | if (level >= KVM_PUT_RESET_STATE) { | |
1202 | events.flags |= | |
1203 | KVM_VCPUEVENT_VALID_NMI_PENDING | KVM_VCPUEVENT_VALID_SIPI_VECTOR; | |
1204 | } | |
aee028b9 | 1205 | |
a0fb002c JK |
1206 | return kvm_vcpu_ioctl(env, KVM_SET_VCPU_EVENTS, &events); |
1207 | #else | |
1208 | return 0; | |
1209 | #endif | |
1210 | } | |
1211 | ||
1212 | static int kvm_get_vcpu_events(CPUState *env) | |
1213 | { | |
1214 | #ifdef KVM_CAP_VCPU_EVENTS | |
1215 | struct kvm_vcpu_events events; | |
1216 | int ret; | |
1217 | ||
1218 | if (!kvm_has_vcpu_events()) { | |
1219 | return 0; | |
1220 | } | |
1221 | ||
1222 | ret = kvm_vcpu_ioctl(env, KVM_GET_VCPU_EVENTS, &events); | |
1223 | if (ret < 0) { | |
1224 | return ret; | |
1225 | } | |
31827373 | 1226 | env->exception_injected = |
a0fb002c JK |
1227 | events.exception.injected ? events.exception.nr : -1; |
1228 | env->has_error_code = events.exception.has_error_code; | |
1229 | env->error_code = events.exception.error_code; | |
1230 | ||
1231 | env->interrupt_injected = | |
1232 | events.interrupt.injected ? events.interrupt.nr : -1; | |
1233 | env->soft_interrupt = events.interrupt.soft; | |
1234 | ||
1235 | env->nmi_injected = events.nmi.injected; | |
1236 | env->nmi_pending = events.nmi.pending; | |
1237 | if (events.nmi.masked) { | |
1238 | env->hflags2 |= HF2_NMI_MASK; | |
1239 | } else { | |
1240 | env->hflags2 &= ~HF2_NMI_MASK; | |
1241 | } | |
1242 | ||
1243 | env->sipi_vector = events.sipi_vector; | |
1244 | #endif | |
1245 | ||
1246 | return 0; | |
1247 | } | |
1248 | ||
b0b1d690 JK |
1249 | static int kvm_guest_debug_workarounds(CPUState *env) |
1250 | { | |
1251 | int ret = 0; | |
1252 | #ifdef KVM_CAP_SET_GUEST_DEBUG | |
1253 | unsigned long reinject_trap = 0; | |
1254 | ||
1255 | if (!kvm_has_vcpu_events()) { | |
1256 | if (env->exception_injected == 1) { | |
1257 | reinject_trap = KVM_GUESTDBG_INJECT_DB; | |
1258 | } else if (env->exception_injected == 3) { | |
1259 | reinject_trap = KVM_GUESTDBG_INJECT_BP; | |
1260 | } | |
1261 | env->exception_injected = -1; | |
1262 | } | |
1263 | ||
1264 | /* | |
1265 | * Kernels before KVM_CAP_X86_ROBUST_SINGLESTEP overwrote flags.TF | |
1266 | * injected via SET_GUEST_DEBUG while updating GP regs. Work around this | |
1267 | * by updating the debug state once again if single-stepping is on. | |
1268 | * Another reason to call kvm_update_guest_debug here is a pending debug | |
1269 | * trap raise by the guest. On kernels without SET_VCPU_EVENTS we have to | |
1270 | * reinject them via SET_GUEST_DEBUG. | |
1271 | */ | |
1272 | if (reinject_trap || | |
1273 | (!kvm_has_robust_singlestep() && env->singlestep_enabled)) { | |
1274 | ret = kvm_update_guest_debug(env, reinject_trap); | |
1275 | } | |
1276 | #endif /* KVM_CAP_SET_GUEST_DEBUG */ | |
1277 | return ret; | |
1278 | } | |
1279 | ||
ff44f1a3 JK |
1280 | static int kvm_put_debugregs(CPUState *env) |
1281 | { | |
1282 | #ifdef KVM_CAP_DEBUGREGS | |
1283 | struct kvm_debugregs dbgregs; | |
1284 | int i; | |
1285 | ||
1286 | if (!kvm_has_debugregs()) { | |
1287 | return 0; | |
1288 | } | |
1289 | ||
1290 | for (i = 0; i < 4; i++) { | |
1291 | dbgregs.db[i] = env->dr[i]; | |
1292 | } | |
1293 | dbgregs.dr6 = env->dr[6]; | |
1294 | dbgregs.dr7 = env->dr[7]; | |
1295 | dbgregs.flags = 0; | |
1296 | ||
1297 | return kvm_vcpu_ioctl(env, KVM_SET_DEBUGREGS, &dbgregs); | |
1298 | #else | |
1299 | return 0; | |
1300 | #endif | |
1301 | } | |
1302 | ||
1303 | static int kvm_get_debugregs(CPUState *env) | |
1304 | { | |
1305 | #ifdef KVM_CAP_DEBUGREGS | |
1306 | struct kvm_debugregs dbgregs; | |
1307 | int i, ret; | |
1308 | ||
1309 | if (!kvm_has_debugregs()) { | |
1310 | return 0; | |
1311 | } | |
1312 | ||
1313 | ret = kvm_vcpu_ioctl(env, KVM_GET_DEBUGREGS, &dbgregs); | |
1314 | if (ret < 0) { | |
b9bec74b | 1315 | return ret; |
ff44f1a3 JK |
1316 | } |
1317 | for (i = 0; i < 4; i++) { | |
1318 | env->dr[i] = dbgregs.db[i]; | |
1319 | } | |
1320 | env->dr[4] = env->dr[6] = dbgregs.dr6; | |
1321 | env->dr[5] = env->dr[7] = dbgregs.dr7; | |
1322 | #endif | |
1323 | ||
1324 | return 0; | |
1325 | } | |
1326 | ||
ea375f9a | 1327 | int kvm_arch_put_registers(CPUState *env, int level) |
05330448 AL |
1328 | { |
1329 | int ret; | |
1330 | ||
dbaa07c4 JK |
1331 | assert(cpu_is_stopped(env) || qemu_cpu_self(env)); |
1332 | ||
05330448 | 1333 | ret = kvm_getput_regs(env, 1); |
b9bec74b | 1334 | if (ret < 0) { |
05330448 | 1335 | return ret; |
b9bec74b | 1336 | } |
f1665b21 | 1337 | ret = kvm_put_xsave(env); |
b9bec74b | 1338 | if (ret < 0) { |
f1665b21 | 1339 | return ret; |
b9bec74b | 1340 | } |
f1665b21 | 1341 | ret = kvm_put_xcrs(env); |
b9bec74b | 1342 | if (ret < 0) { |
05330448 | 1343 | return ret; |
b9bec74b | 1344 | } |
05330448 | 1345 | ret = kvm_put_sregs(env); |
b9bec74b | 1346 | if (ret < 0) { |
05330448 | 1347 | return ret; |
b9bec74b | 1348 | } |
ea643051 | 1349 | ret = kvm_put_msrs(env, level); |
b9bec74b | 1350 | if (ret < 0) { |
05330448 | 1351 | return ret; |
b9bec74b | 1352 | } |
ea643051 JK |
1353 | if (level >= KVM_PUT_RESET_STATE) { |
1354 | ret = kvm_put_mp_state(env); | |
b9bec74b | 1355 | if (ret < 0) { |
ea643051 | 1356 | return ret; |
b9bec74b | 1357 | } |
ea643051 | 1358 | } |
ea643051 | 1359 | ret = kvm_put_vcpu_events(env, level); |
b9bec74b | 1360 | if (ret < 0) { |
a0fb002c | 1361 | return ret; |
b9bec74b | 1362 | } |
0d75a9ec | 1363 | ret = kvm_put_debugregs(env); |
b9bec74b | 1364 | if (ret < 0) { |
b0b1d690 | 1365 | return ret; |
b9bec74b | 1366 | } |
0d75a9ec JK |
1367 | /* must be last */ |
1368 | ret = kvm_guest_debug_workarounds(env); | |
b9bec74b | 1369 | if (ret < 0) { |
ff44f1a3 | 1370 | return ret; |
b9bec74b | 1371 | } |
05330448 AL |
1372 | return 0; |
1373 | } | |
1374 | ||
1375 | int kvm_arch_get_registers(CPUState *env) | |
1376 | { | |
1377 | int ret; | |
1378 | ||
dbaa07c4 JK |
1379 | assert(cpu_is_stopped(env) || qemu_cpu_self(env)); |
1380 | ||
05330448 | 1381 | ret = kvm_getput_regs(env, 0); |
b9bec74b | 1382 | if (ret < 0) { |
05330448 | 1383 | return ret; |
b9bec74b | 1384 | } |
f1665b21 | 1385 | ret = kvm_get_xsave(env); |
b9bec74b | 1386 | if (ret < 0) { |
f1665b21 | 1387 | return ret; |
b9bec74b | 1388 | } |
f1665b21 | 1389 | ret = kvm_get_xcrs(env); |
b9bec74b | 1390 | if (ret < 0) { |
05330448 | 1391 | return ret; |
b9bec74b | 1392 | } |
05330448 | 1393 | ret = kvm_get_sregs(env); |
b9bec74b | 1394 | if (ret < 0) { |
05330448 | 1395 | return ret; |
b9bec74b | 1396 | } |
05330448 | 1397 | ret = kvm_get_msrs(env); |
b9bec74b | 1398 | if (ret < 0) { |
05330448 | 1399 | return ret; |
b9bec74b | 1400 | } |
5a2e3c2e | 1401 | ret = kvm_get_mp_state(env); |
b9bec74b | 1402 | if (ret < 0) { |
5a2e3c2e | 1403 | return ret; |
b9bec74b | 1404 | } |
a0fb002c | 1405 | ret = kvm_get_vcpu_events(env); |
b9bec74b | 1406 | if (ret < 0) { |
a0fb002c | 1407 | return ret; |
b9bec74b | 1408 | } |
ff44f1a3 | 1409 | ret = kvm_get_debugregs(env); |
b9bec74b | 1410 | if (ret < 0) { |
ff44f1a3 | 1411 | return ret; |
b9bec74b | 1412 | } |
05330448 AL |
1413 | return 0; |
1414 | } | |
1415 | ||
1416 | int kvm_arch_pre_run(CPUState *env, struct kvm_run *run) | |
1417 | { | |
276ce815 LJ |
1418 | /* Inject NMI */ |
1419 | if (env->interrupt_request & CPU_INTERRUPT_NMI) { | |
1420 | env->interrupt_request &= ~CPU_INTERRUPT_NMI; | |
1421 | DPRINTF("injected NMI\n"); | |
1422 | kvm_vcpu_ioctl(env, KVM_NMI); | |
1423 | } | |
1424 | ||
05330448 AL |
1425 | /* Try to inject an interrupt if the guest can accept it */ |
1426 | if (run->ready_for_interrupt_injection && | |
1427 | (env->interrupt_request & CPU_INTERRUPT_HARD) && | |
1428 | (env->eflags & IF_MASK)) { | |
1429 | int irq; | |
1430 | ||
1431 | env->interrupt_request &= ~CPU_INTERRUPT_HARD; | |
1432 | irq = cpu_get_pic_interrupt(env); | |
1433 | if (irq >= 0) { | |
1434 | struct kvm_interrupt intr; | |
1435 | intr.irq = irq; | |
1436 | /* FIXME: errors */ | |
8c0d577e | 1437 | DPRINTF("injected interrupt %d\n", irq); |
05330448 AL |
1438 | kvm_vcpu_ioctl(env, KVM_INTERRUPT, &intr); |
1439 | } | |
1440 | } | |
1441 | ||
1442 | /* If we have an interrupt but the guest is not ready to receive an | |
1443 | * interrupt, request an interrupt window exit. This will | |
1444 | * cause a return to userspace as soon as the guest is ready to | |
1445 | * receive interrupts. */ | |
b9bec74b | 1446 | if ((env->interrupt_request & CPU_INTERRUPT_HARD)) { |
05330448 | 1447 | run->request_interrupt_window = 1; |
b9bec74b | 1448 | } else { |
05330448 | 1449 | run->request_interrupt_window = 0; |
b9bec74b | 1450 | } |
05330448 | 1451 | |
8c0d577e | 1452 | DPRINTF("setting tpr\n"); |
4a942cea | 1453 | run->cr8 = cpu_get_apic_tpr(env->apic_state); |
05330448 AL |
1454 | |
1455 | return 0; | |
1456 | } | |
1457 | ||
1458 | int kvm_arch_post_run(CPUState *env, struct kvm_run *run) | |
1459 | { | |
b9bec74b | 1460 | if (run->if_flag) { |
05330448 | 1461 | env->eflags |= IF_MASK; |
b9bec74b | 1462 | } else { |
05330448 | 1463 | env->eflags &= ~IF_MASK; |
b9bec74b | 1464 | } |
4a942cea BS |
1465 | cpu_set_apic_tpr(env->apic_state, run->cr8); |
1466 | cpu_set_apic_base(env->apic_state, run->apic_base); | |
05330448 AL |
1467 | |
1468 | return 0; | |
1469 | } | |
1470 | ||
0af691d7 MT |
1471 | int kvm_arch_process_irqchip_events(CPUState *env) |
1472 | { | |
1473 | if (env->interrupt_request & CPU_INTERRUPT_INIT) { | |
1474 | kvm_cpu_synchronize_state(env); | |
1475 | do_cpu_init(env); | |
1476 | env->exception_index = EXCP_HALTED; | |
1477 | } | |
1478 | ||
1479 | if (env->interrupt_request & CPU_INTERRUPT_SIPI) { | |
1480 | kvm_cpu_synchronize_state(env); | |
1481 | do_cpu_sipi(env); | |
1482 | } | |
1483 | ||
1484 | return env->halted; | |
1485 | } | |
1486 | ||
05330448 AL |
1487 | static int kvm_handle_halt(CPUState *env) |
1488 | { | |
1489 | if (!((env->interrupt_request & CPU_INTERRUPT_HARD) && | |
1490 | (env->eflags & IF_MASK)) && | |
1491 | !(env->interrupt_request & CPU_INTERRUPT_NMI)) { | |
1492 | env->halted = 1; | |
1493 | env->exception_index = EXCP_HLT; | |
1494 | return 0; | |
1495 | } | |
1496 | ||
1497 | return 1; | |
1498 | } | |
1499 | ||
bb44e0d1 JK |
1500 | static bool host_supports_vmx(void) |
1501 | { | |
1502 | uint32_t ecx, unused; | |
1503 | ||
1504 | host_cpuid(1, 0, &unused, &unused, &ecx, &unused); | |
1505 | return ecx & CPUID_EXT_VMX; | |
1506 | } | |
1507 | ||
1508 | #define VMX_INVALID_GUEST_STATE 0x80000021 | |
1509 | ||
05330448 AL |
1510 | int kvm_arch_handle_exit(CPUState *env, struct kvm_run *run) |
1511 | { | |
bb44e0d1 | 1512 | uint64_t code; |
05330448 AL |
1513 | int ret = 0; |
1514 | ||
1515 | switch (run->exit_reason) { | |
1516 | case KVM_EXIT_HLT: | |
8c0d577e | 1517 | DPRINTF("handle_hlt\n"); |
05330448 AL |
1518 | ret = kvm_handle_halt(env); |
1519 | break; | |
646042e1 JK |
1520 | case KVM_EXIT_SET_TPR: |
1521 | ret = 1; | |
1522 | break; | |
bb44e0d1 JK |
1523 | case KVM_EXIT_FAIL_ENTRY: |
1524 | code = run->fail_entry.hardware_entry_failure_reason; | |
1525 | fprintf(stderr, "KVM: entry failed, hardware error 0x%" PRIx64 "\n", | |
1526 | code); | |
1527 | if (host_supports_vmx() && code == VMX_INVALID_GUEST_STATE) { | |
1528 | fprintf(stderr, | |
1529 | "\nIf you're runnning a guest on an Intel machine without " | |
1530 | "unrestricted mode\n" | |
1531 | "support, the failure can be most likely due to the guest " | |
1532 | "entering an invalid\n" | |
1533 | "state for Intel VT. For example, the guest maybe running " | |
1534 | "in big real mode\n" | |
1535 | "which is not supported on less recent Intel processors." | |
1536 | "\n\n"); | |
1537 | } | |
1538 | ret = -1; | |
1539 | break; | |
1540 | case KVM_EXIT_EXCEPTION: | |
1541 | fprintf(stderr, "KVM: exception %d exit (error code 0x%x)\n", | |
1542 | run->ex.exception, run->ex.error_code); | |
1543 | ret = -1; | |
1544 | break; | |
73aaec4a JK |
1545 | default: |
1546 | fprintf(stderr, "KVM: unknown exit reason %d\n", run->exit_reason); | |
1547 | ret = -1; | |
1548 | break; | |
05330448 AL |
1549 | } |
1550 | ||
1551 | return ret; | |
1552 | } | |
e22a25c9 AL |
1553 | |
1554 | #ifdef KVM_CAP_SET_GUEST_DEBUG | |
e22a25c9 AL |
1555 | int kvm_arch_insert_sw_breakpoint(CPUState *env, struct kvm_sw_breakpoint *bp) |
1556 | { | |
38972938 | 1557 | static const uint8_t int3 = 0xcc; |
64bf3f4e | 1558 | |
e22a25c9 | 1559 | if (cpu_memory_rw_debug(env, bp->pc, (uint8_t *)&bp->saved_insn, 1, 0) || |
b9bec74b | 1560 | cpu_memory_rw_debug(env, bp->pc, (uint8_t *)&int3, 1, 1)) { |
e22a25c9 | 1561 | return -EINVAL; |
b9bec74b | 1562 | } |
e22a25c9 AL |
1563 | return 0; |
1564 | } | |
1565 | ||
1566 | int kvm_arch_remove_sw_breakpoint(CPUState *env, struct kvm_sw_breakpoint *bp) | |
1567 | { | |
1568 | uint8_t int3; | |
1569 | ||
1570 | if (cpu_memory_rw_debug(env, bp->pc, &int3, 1, 0) || int3 != 0xcc || | |
b9bec74b | 1571 | cpu_memory_rw_debug(env, bp->pc, (uint8_t *)&bp->saved_insn, 1, 1)) { |
e22a25c9 | 1572 | return -EINVAL; |
b9bec74b | 1573 | } |
e22a25c9 AL |
1574 | return 0; |
1575 | } | |
1576 | ||
1577 | static struct { | |
1578 | target_ulong addr; | |
1579 | int len; | |
1580 | int type; | |
1581 | } hw_breakpoint[4]; | |
1582 | ||
1583 | static int nb_hw_breakpoint; | |
1584 | ||
1585 | static int find_hw_breakpoint(target_ulong addr, int len, int type) | |
1586 | { | |
1587 | int n; | |
1588 | ||
b9bec74b | 1589 | for (n = 0; n < nb_hw_breakpoint; n++) { |
e22a25c9 | 1590 | if (hw_breakpoint[n].addr == addr && hw_breakpoint[n].type == type && |
b9bec74b | 1591 | (hw_breakpoint[n].len == len || len == -1)) { |
e22a25c9 | 1592 | return n; |
b9bec74b JK |
1593 | } |
1594 | } | |
e22a25c9 AL |
1595 | return -1; |
1596 | } | |
1597 | ||
1598 | int kvm_arch_insert_hw_breakpoint(target_ulong addr, | |
1599 | target_ulong len, int type) | |
1600 | { | |
1601 | switch (type) { | |
1602 | case GDB_BREAKPOINT_HW: | |
1603 | len = 1; | |
1604 | break; | |
1605 | case GDB_WATCHPOINT_WRITE: | |
1606 | case GDB_WATCHPOINT_ACCESS: | |
1607 | switch (len) { | |
1608 | case 1: | |
1609 | break; | |
1610 | case 2: | |
1611 | case 4: | |
1612 | case 8: | |
b9bec74b | 1613 | if (addr & (len - 1)) { |
e22a25c9 | 1614 | return -EINVAL; |
b9bec74b | 1615 | } |
e22a25c9 AL |
1616 | break; |
1617 | default: | |
1618 | return -EINVAL; | |
1619 | } | |
1620 | break; | |
1621 | default: | |
1622 | return -ENOSYS; | |
1623 | } | |
1624 | ||
b9bec74b | 1625 | if (nb_hw_breakpoint == 4) { |
e22a25c9 | 1626 | return -ENOBUFS; |
b9bec74b JK |
1627 | } |
1628 | if (find_hw_breakpoint(addr, len, type) >= 0) { | |
e22a25c9 | 1629 | return -EEXIST; |
b9bec74b | 1630 | } |
e22a25c9 AL |
1631 | hw_breakpoint[nb_hw_breakpoint].addr = addr; |
1632 | hw_breakpoint[nb_hw_breakpoint].len = len; | |
1633 | hw_breakpoint[nb_hw_breakpoint].type = type; | |
1634 | nb_hw_breakpoint++; | |
1635 | ||
1636 | return 0; | |
1637 | } | |
1638 | ||
1639 | int kvm_arch_remove_hw_breakpoint(target_ulong addr, | |
1640 | target_ulong len, int type) | |
1641 | { | |
1642 | int n; | |
1643 | ||
1644 | n = find_hw_breakpoint(addr, (type == GDB_BREAKPOINT_HW) ? 1 : len, type); | |
b9bec74b | 1645 | if (n < 0) { |
e22a25c9 | 1646 | return -ENOENT; |
b9bec74b | 1647 | } |
e22a25c9 AL |
1648 | nb_hw_breakpoint--; |
1649 | hw_breakpoint[n] = hw_breakpoint[nb_hw_breakpoint]; | |
1650 | ||
1651 | return 0; | |
1652 | } | |
1653 | ||
1654 | void kvm_arch_remove_all_hw_breakpoints(void) | |
1655 | { | |
1656 | nb_hw_breakpoint = 0; | |
1657 | } | |
1658 | ||
1659 | static CPUWatchpoint hw_watchpoint; | |
1660 | ||
1661 | int kvm_arch_debug(struct kvm_debug_exit_arch *arch_info) | |
1662 | { | |
1663 | int handle = 0; | |
1664 | int n; | |
1665 | ||
1666 | if (arch_info->exception == 1) { | |
1667 | if (arch_info->dr6 & (1 << 14)) { | |
b9bec74b | 1668 | if (cpu_single_env->singlestep_enabled) { |
e22a25c9 | 1669 | handle = 1; |
b9bec74b | 1670 | } |
e22a25c9 | 1671 | } else { |
b9bec74b JK |
1672 | for (n = 0; n < 4; n++) { |
1673 | if (arch_info->dr6 & (1 << n)) { | |
e22a25c9 AL |
1674 | switch ((arch_info->dr7 >> (16 + n*4)) & 0x3) { |
1675 | case 0x0: | |
1676 | handle = 1; | |
1677 | break; | |
1678 | case 0x1: | |
1679 | handle = 1; | |
1680 | cpu_single_env->watchpoint_hit = &hw_watchpoint; | |
1681 | hw_watchpoint.vaddr = hw_breakpoint[n].addr; | |
1682 | hw_watchpoint.flags = BP_MEM_WRITE; | |
1683 | break; | |
1684 | case 0x3: | |
1685 | handle = 1; | |
1686 | cpu_single_env->watchpoint_hit = &hw_watchpoint; | |
1687 | hw_watchpoint.vaddr = hw_breakpoint[n].addr; | |
1688 | hw_watchpoint.flags = BP_MEM_ACCESS; | |
1689 | break; | |
1690 | } | |
b9bec74b JK |
1691 | } |
1692 | } | |
e22a25c9 | 1693 | } |
b9bec74b | 1694 | } else if (kvm_find_sw_breakpoint(cpu_single_env, arch_info->pc)) { |
e22a25c9 | 1695 | handle = 1; |
b9bec74b | 1696 | } |
b0b1d690 JK |
1697 | if (!handle) { |
1698 | cpu_synchronize_state(cpu_single_env); | |
1699 | assert(cpu_single_env->exception_injected == -1); | |
1700 | ||
1701 | cpu_single_env->exception_injected = arch_info->exception; | |
1702 | cpu_single_env->has_error_code = 0; | |
1703 | } | |
e22a25c9 AL |
1704 | |
1705 | return handle; | |
1706 | } | |
1707 | ||
1708 | void kvm_arch_update_guest_debug(CPUState *env, struct kvm_guest_debug *dbg) | |
1709 | { | |
1710 | const uint8_t type_code[] = { | |
1711 | [GDB_BREAKPOINT_HW] = 0x0, | |
1712 | [GDB_WATCHPOINT_WRITE] = 0x1, | |
1713 | [GDB_WATCHPOINT_ACCESS] = 0x3 | |
1714 | }; | |
1715 | const uint8_t len_code[] = { | |
1716 | [1] = 0x0, [2] = 0x1, [4] = 0x3, [8] = 0x2 | |
1717 | }; | |
1718 | int n; | |
1719 | ||
b9bec74b | 1720 | if (kvm_sw_breakpoints_active(env)) { |
e22a25c9 | 1721 | dbg->control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_SW_BP; |
b9bec74b | 1722 | } |
e22a25c9 AL |
1723 | if (nb_hw_breakpoint > 0) { |
1724 | dbg->control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_HW_BP; | |
1725 | dbg->arch.debugreg[7] = 0x0600; | |
1726 | for (n = 0; n < nb_hw_breakpoint; n++) { | |
1727 | dbg->arch.debugreg[n] = hw_breakpoint[n].addr; | |
1728 | dbg->arch.debugreg[7] |= (2 << (n * 2)) | | |
1729 | (type_code[hw_breakpoint[n].type] << (16 + n*4)) | | |
95c077c9 | 1730 | ((uint32_t)len_code[hw_breakpoint[n].len] << (18 + n*4)); |
e22a25c9 AL |
1731 | } |
1732 | } | |
1733 | } | |
1734 | #endif /* KVM_CAP_SET_GUEST_DEBUG */ | |
4513d923 GN |
1735 | |
1736 | bool kvm_arch_stop_on_emulation_error(CPUState *env) | |
1737 | { | |
b9bec74b JK |
1738 | return !(env->cr[0] & CR0_PE_MASK) || |
1739 | ((env->segs[R_CS].selector & 3) != 3); | |
4513d923 GN |
1740 | } |
1741 | ||
c0532a76 MT |
1742 | static void hardware_memory_error(void) |
1743 | { | |
1744 | fprintf(stderr, "Hardware memory error!\n"); | |
1745 | exit(1); | |
1746 | } | |
1747 | ||
f71ac88f HS |
1748 | #ifdef KVM_CAP_MCE |
1749 | static void kvm_mce_broadcast_rest(CPUState *env) | |
1750 | { | |
7cc2cc3e JD |
1751 | struct kvm_x86_mce mce = { |
1752 | .bank = 1, | |
1753 | .status = MCI_STATUS_VAL | MCI_STATUS_UC, | |
1754 | .mcg_status = MCG_STATUS_MCIP | MCG_STATUS_RIPV, | |
1755 | .addr = 0, | |
1756 | .misc = 0, | |
1757 | }; | |
f71ac88f | 1758 | CPUState *cenv; |
f71ac88f HS |
1759 | |
1760 | /* Broadcast MCA signal for processor version 06H_EH and above */ | |
2bd3e04c | 1761 | if (cpu_x86_support_mca_broadcast(env)) { |
f71ac88f HS |
1762 | for (cenv = first_cpu; cenv != NULL; cenv = cenv->next_cpu) { |
1763 | if (cenv == env) { | |
1764 | continue; | |
1765 | } | |
7cc2cc3e | 1766 | kvm_inject_x86_mce_on(cenv, &mce, ABORT_ON_ERROR); |
f71ac88f HS |
1767 | } |
1768 | } | |
1769 | } | |
e387c338 JD |
1770 | |
1771 | static void kvm_mce_inj_srar_dataload(CPUState *env, target_phys_addr_t paddr) | |
1772 | { | |
1773 | struct kvm_x86_mce mce = { | |
1774 | .bank = 9, | |
1775 | .status = MCI_STATUS_VAL | MCI_STATUS_UC | MCI_STATUS_EN | |
1776 | | MCI_STATUS_MISCV | MCI_STATUS_ADDRV | MCI_STATUS_S | |
1777 | | MCI_STATUS_AR | 0x134, | |
1778 | .mcg_status = MCG_STATUS_MCIP | MCG_STATUS_EIPV, | |
1779 | .addr = paddr, | |
1780 | .misc = (MCM_ADDR_PHYS << 6) | 0xc, | |
1781 | }; | |
1782 | int r; | |
1783 | ||
1784 | r = kvm_set_mce(env, &mce); | |
1785 | if (r < 0) { | |
1786 | fprintf(stderr, "kvm_set_mce: %s\n", strerror(errno)); | |
1787 | abort(); | |
1788 | } | |
1789 | kvm_mce_broadcast_rest(env); | |
1790 | } | |
1791 | ||
1792 | static void kvm_mce_inj_srao_memscrub(CPUState *env, target_phys_addr_t paddr) | |
1793 | { | |
1794 | struct kvm_x86_mce mce = { | |
1795 | .bank = 9, | |
1796 | .status = MCI_STATUS_VAL | MCI_STATUS_UC | MCI_STATUS_EN | |
1797 | | MCI_STATUS_MISCV | MCI_STATUS_ADDRV | MCI_STATUS_S | |
1798 | | 0xc0, | |
1799 | .mcg_status = MCG_STATUS_MCIP | MCG_STATUS_RIPV, | |
1800 | .addr = paddr, | |
1801 | .misc = (MCM_ADDR_PHYS << 6) | 0xc, | |
1802 | }; | |
1803 | int r; | |
1804 | ||
1805 | r = kvm_set_mce(env, &mce); | |
1806 | if (r < 0) { | |
1807 | fprintf(stderr, "kvm_set_mce: %s\n", strerror(errno)); | |
1808 | abort(); | |
1809 | } | |
1810 | kvm_mce_broadcast_rest(env); | |
1811 | } | |
1812 | ||
1813 | static void kvm_mce_inj_srao_memscrub2(CPUState *env, target_phys_addr_t paddr) | |
1814 | { | |
7cc2cc3e JD |
1815 | struct kvm_x86_mce mce = { |
1816 | .bank = 9, | |
1817 | .status = MCI_STATUS_VAL | MCI_STATUS_UC | MCI_STATUS_EN | |
1818 | | MCI_STATUS_MISCV | MCI_STATUS_ADDRV | MCI_STATUS_S | |
1819 | | 0xc0, | |
1820 | .mcg_status = MCG_STATUS_MCIP | MCG_STATUS_RIPV, | |
1821 | .addr = paddr, | |
1822 | .misc = (MCM_ADDR_PHYS << 6) | 0xc, | |
1823 | }; | |
e387c338 | 1824 | |
7cc2cc3e | 1825 | kvm_inject_x86_mce_on(env, &mce, ABORT_ON_ERROR); |
e387c338 JD |
1826 | kvm_mce_broadcast_rest(env); |
1827 | } | |
1828 | ||
f71ac88f HS |
1829 | #endif |
1830 | ||
c0532a76 MT |
1831 | int kvm_on_sigbus_vcpu(CPUState *env, int code, void *addr) |
1832 | { | |
1833 | #if defined(KVM_CAP_MCE) | |
c0532a76 MT |
1834 | void *vaddr; |
1835 | ram_addr_t ram_addr; | |
1836 | target_phys_addr_t paddr; | |
c0532a76 MT |
1837 | |
1838 | if ((env->mcg_cap & MCG_SER_P) && addr | |
1839 | && (code == BUS_MCEERR_AR | |
1840 | || code == BUS_MCEERR_AO)) { | |
c0532a76 MT |
1841 | vaddr = (void *)addr; |
1842 | if (qemu_ram_addr_from_host(vaddr, &ram_addr) || | |
1843 | !kvm_physical_memory_addr_from_ram(env->kvm_state, ram_addr, &paddr)) { | |
1844 | fprintf(stderr, "Hardware memory error for memory used by " | |
1845 | "QEMU itself instead of guest system!\n"); | |
1846 | /* Hope we are lucky for AO MCE */ | |
1847 | if (code == BUS_MCEERR_AO) { | |
1848 | return 0; | |
1849 | } else { | |
1850 | hardware_memory_error(); | |
1851 | } | |
1852 | } | |
e387c338 JD |
1853 | |
1854 | if (code == BUS_MCEERR_AR) { | |
1855 | /* Fake an Intel architectural Data Load SRAR UCR */ | |
1856 | kvm_mce_inj_srar_dataload(env, paddr); | |
1857 | } else { | |
1858 | /* | |
1859 | * If there is an MCE excpetion being processed, ignore | |
1860 | * this SRAO MCE | |
1861 | */ | |
1862 | if (!kvm_mce_in_progress(env)) { | |
1863 | /* Fake an Intel architectural Memory scrubbing UCR */ | |
1864 | kvm_mce_inj_srao_memscrub(env, paddr); | |
1865 | } | |
c0532a76 MT |
1866 | } |
1867 | } else | |
1868 | #endif | |
1869 | { | |
1870 | if (code == BUS_MCEERR_AO) { | |
1871 | return 0; | |
1872 | } else if (code == BUS_MCEERR_AR) { | |
1873 | hardware_memory_error(); | |
1874 | } else { | |
1875 | return 1; | |
1876 | } | |
1877 | } | |
1878 | return 0; | |
1879 | } | |
1880 | ||
1881 | int kvm_on_sigbus(int code, void *addr) | |
1882 | { | |
1883 | #if defined(KVM_CAP_MCE) | |
1884 | if ((first_cpu->mcg_cap & MCG_SER_P) && addr && code == BUS_MCEERR_AO) { | |
c0532a76 MT |
1885 | void *vaddr; |
1886 | ram_addr_t ram_addr; | |
1887 | target_phys_addr_t paddr; | |
c0532a76 MT |
1888 | |
1889 | /* Hope we are lucky for AO MCE */ | |
1890 | vaddr = addr; | |
1891 | if (qemu_ram_addr_from_host(vaddr, &ram_addr) || | |
1892 | !kvm_physical_memory_addr_from_ram(first_cpu->kvm_state, ram_addr, &paddr)) { | |
1893 | fprintf(stderr, "Hardware memory error for memory used by " | |
1894 | "QEMU itself instead of guest system!: %p\n", addr); | |
1895 | return 0; | |
1896 | } | |
e387c338 | 1897 | kvm_mce_inj_srao_memscrub2(first_cpu, paddr); |
c0532a76 MT |
1898 | } else |
1899 | #endif | |
1900 | { | |
1901 | if (code == BUS_MCEERR_AO) { | |
1902 | return 0; | |
1903 | } else if (code == BUS_MCEERR_AR) { | |
1904 | hardware_memory_error(); | |
1905 | } else { | |
1906 | return 1; | |
1907 | } | |
1908 | } | |
1909 | return 0; | |
1910 | } |