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block: fix deadlock in bdrv_co_flush
[qemu/kevin.git] / target-i386 / kvm.c
blobd1a25c54654670b10c8b49bd864d5d96f7f813fc
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 "qemu/osdep.h"
16 #include "qapi/error.h"
17 #include <sys/ioctl.h>
18 #include <sys/utsname.h>
19
20 #include <linux/kvm.h>
21 #include <linux/kvm_para.h>
22
23 #include "qemu-common.h"
24 #include "cpu.h"
25 #include "sysemu/sysemu.h"
26 #include "sysemu/kvm_int.h"
27 #include "kvm_i386.h"
28 #include "hyperv.h"
29
30 #include "exec/gdbstub.h"
31 #include "qemu/host-utils.h"
32 #include "qemu/config-file.h"
33 #include "qemu/error-report.h"
34 #include "hw/i386/pc.h"
35 #include "hw/i386/apic.h"
36 #include "hw/i386/apic_internal.h"
37 #include "hw/i386/apic-msidef.h"
38 #include "hw/i386/intel_iommu.h"
39 #include "hw/i386/x86-iommu.h"
40
41 #include "exec/ioport.h"
42 #include "standard-headers/asm-x86/hyperv.h"
43 #include "hw/pci/pci.h"
44 #include "hw/pci/msi.h"
45 #include "migration/migration.h"
46 #include "exec/memattrs.h"
47 #include "trace.h"
48
49 //#define DEBUG_KVM
50
51 #ifdef DEBUG_KVM
52 #define DPRINTF(fmt, ...) \
53 do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
54 #else
55 #define DPRINTF(fmt, ...) \
56 do { } while (0)
57 #endif
58
59 #define MSR_KVM_WALL_CLOCK 0x11
60 #define MSR_KVM_SYSTEM_TIME 0x12
61
62 /* A 4096-byte buffer can hold the 8-byte kvm_msrs header, plus
63 * 255 kvm_msr_entry structs */
64 #define MSR_BUF_SIZE 4096
65
66 #ifndef BUS_MCEERR_AR
67 #define BUS_MCEERR_AR 4
68 #endif
69 #ifndef BUS_MCEERR_AO
70 #define BUS_MCEERR_AO 5
71 #endif
72
73 const KVMCapabilityInfo kvm_arch_required_capabilities[] = {
74 KVM_CAP_INFO(SET_TSS_ADDR),
75 KVM_CAP_INFO(EXT_CPUID),
76 KVM_CAP_INFO(MP_STATE),
77 KVM_CAP_LAST_INFO
78 };
79
80 static bool has_msr_star;
81 static bool has_msr_hsave_pa;
82 static bool has_msr_tsc_aux;
83 static bool has_msr_tsc_adjust;
84 static bool has_msr_tsc_deadline;
85 static bool has_msr_feature_control;
86 static bool has_msr_async_pf_en;
87 static bool has_msr_pv_eoi_en;
88 static bool has_msr_misc_enable;
89 static bool has_msr_smbase;
90 static bool has_msr_bndcfgs;
91 static bool has_msr_kvm_steal_time;
92 static int lm_capable_kernel;
93 static bool has_msr_hv_hypercall;
94 static bool has_msr_hv_vapic;
95 static bool has_msr_hv_tsc;
96 static bool has_msr_hv_crash;
97 static bool has_msr_hv_reset;
98 static bool has_msr_hv_vpindex;
99 static bool has_msr_hv_runtime;
100 static bool has_msr_hv_synic;
101 static bool has_msr_hv_stimer;
102 static bool has_msr_mtrr;
103 static bool has_msr_xss;
104
105 static bool has_msr_architectural_pmu;
106 static uint32_t num_architectural_pmu_counters;
107
108 static int has_xsave;
109 static int has_xcrs;
110 static int has_pit_state2;
111
112 static bool has_msr_mcg_ext_ctl;
113
114 static struct kvm_cpuid2 *cpuid_cache;
115
116 int kvm_has_pit_state2(void)
117 {
118 return has_pit_state2;
119 }
120
121 bool kvm_has_smm(void)
122 {
123 return kvm_check_extension(kvm_state, KVM_CAP_X86_SMM);
124 }
125
126 bool kvm_allows_irq0_override(void)
127 {
128 return !kvm_irqchip_in_kernel() || kvm_has_gsi_routing();
129 }
130
131 static int kvm_get_tsc(CPUState *cs)
132 {
133 X86CPU *cpu = X86_CPU(cs);
134 CPUX86State *env = &cpu->env;
135 struct {
136 struct kvm_msrs info;
137 struct kvm_msr_entry entries[1];
138 } msr_data;
139 int ret;
140
141 if (env->tsc_valid) {
142 return 0;
143 }
144
145 msr_data.info.nmsrs = 1;
146 msr_data.entries[0].index = MSR_IA32_TSC;
147 env->tsc_valid = !runstate_is_running();
148
149 ret = kvm_vcpu_ioctl(CPU(cpu), KVM_GET_MSRS, &msr_data);
150 if (ret < 0) {
151 return ret;
152 }
153
154 assert(ret == 1);
155 env->tsc = msr_data.entries[0].data;
156 return 0;
157 }
158
159 static inline void do_kvm_synchronize_tsc(void *arg)
160 {
161 CPUState *cpu = arg;
162
163 kvm_get_tsc(cpu);
164 }
165
166 void kvm_synchronize_all_tsc(void)
167 {
168 CPUState *cpu;
169
170 if (kvm_enabled()) {
171 CPU_FOREACH(cpu) {
172 run_on_cpu(cpu, do_kvm_synchronize_tsc, cpu);
173 }
174 }
175 }
176
177 static struct kvm_cpuid2 *try_get_cpuid(KVMState *s, int max)
178 {
179 struct kvm_cpuid2 *cpuid;
180 int r, size;
181
182 size = sizeof(*cpuid) + max * sizeof(*cpuid->entries);
183 cpuid = g_malloc0(size);
184 cpuid->nent = max;
185 r = kvm_ioctl(s, KVM_GET_SUPPORTED_CPUID, cpuid);
186 if (r == 0 && cpuid->nent >= max) {
187 r = -E2BIG;
188 }
189 if (r < 0) {
190 if (r == -E2BIG) {
191 g_free(cpuid);
192 return NULL;
193 } else {
194 fprintf(stderr, "KVM_GET_SUPPORTED_CPUID failed: %s\n",
195 strerror(-r));
196 exit(1);
197 }
198 }
199 return cpuid;
200 }
201
202 /* Run KVM_GET_SUPPORTED_CPUID ioctl(), allocating a buffer large enough
203 * for all entries.
204 */
205 static struct kvm_cpuid2 *get_supported_cpuid(KVMState *s)
206 {
207 struct kvm_cpuid2 *cpuid;
208 int max = 1;
209
210 if (cpuid_cache != NULL) {
211 return cpuid_cache;
212 }
213 while ((cpuid = try_get_cpuid(s, max)) == NULL) {
214 max *= 2;
215 }
216 cpuid_cache = cpuid;
217 return cpuid;
218 }
219
220 static const struct kvm_para_features {
221 int cap;
222 int feature;
223 } para_features[] = {
224 { KVM_CAP_CLOCKSOURCE, KVM_FEATURE_CLOCKSOURCE },
225 { KVM_CAP_NOP_IO_DELAY, KVM_FEATURE_NOP_IO_DELAY },
226 { KVM_CAP_PV_MMU, KVM_FEATURE_MMU_OP },
227 { KVM_CAP_ASYNC_PF, KVM_FEATURE_ASYNC_PF },
228 };
229
230 static int get_para_features(KVMState *s)
231 {
232 int i, features = 0;
233
234 for (i = 0; i < ARRAY_SIZE(para_features); i++) {
235 if (kvm_check_extension(s, para_features[i].cap)) {
236 features |= (1 << para_features[i].feature);
237 }
238 }
239
240 return features;
241 }
242
243
244 /* Returns the value for a specific register on the cpuid entry
245 */
246 static uint32_t cpuid_entry_get_reg(struct kvm_cpuid_entry2 *entry, int reg)
247 {
248 uint32_t ret = 0;
249 switch (reg) {
250 case R_EAX:
251 ret = entry->eax;
252 break;
253 case R_EBX:
254 ret = entry->ebx;
255 break;
256 case R_ECX:
257 ret = entry->ecx;
258 break;
259 case R_EDX:
260 ret = entry->edx;
261 break;
262 }
263 return ret;
264 }
265
266 /* Find matching entry for function/index on kvm_cpuid2 struct
267 */
268 static struct kvm_cpuid_entry2 *cpuid_find_entry(struct kvm_cpuid2 *cpuid,
269 uint32_t function,
270 uint32_t index)
271 {
272 int i;
273 for (i = 0; i < cpuid->nent; ++i) {
274 if (cpuid->entries[i].function == function &&
275 cpuid->entries[i].index == index) {
276 return &cpuid->entries[i];
277 }
278 }
279 /* not found: */
280 return NULL;
281 }
282
283 uint32_t kvm_arch_get_supported_cpuid(KVMState *s, uint32_t function,
284 uint32_t index, int reg)
285 {
286 struct kvm_cpuid2 *cpuid;
287 uint32_t ret = 0;
288 uint32_t cpuid_1_edx;
289 bool found = false;
290
291 cpuid = get_supported_cpuid(s);
292
293 struct kvm_cpuid_entry2 *entry = cpuid_find_entry(cpuid, function, index);
294 if (entry) {
295 found = true;
296 ret = cpuid_entry_get_reg(entry, reg);
297 }
298
299 /* Fixups for the data returned by KVM, below */
300
301 if (function == 1 && reg == R_EDX) {
302 /* KVM before 2.6.30 misreports the following features */
303 ret |= CPUID_MTRR | CPUID_PAT | CPUID_MCE | CPUID_MCA;
304 } else if (function == 1 && reg == R_ECX) {
305 /* We can set the hypervisor flag, even if KVM does not return it on
306 * GET_SUPPORTED_CPUID
307 */
308 ret |= CPUID_EXT_HYPERVISOR;
309 /* tsc-deadline flag is not returned by GET_SUPPORTED_CPUID, but it
310 * can be enabled if the kernel has KVM_CAP_TSC_DEADLINE_TIMER,
311 * and the irqchip is in the kernel.
312 */
313 if (kvm_irqchip_in_kernel() &&
314 kvm_check_extension(s, KVM_CAP_TSC_DEADLINE_TIMER)) {
315 ret |= CPUID_EXT_TSC_DEADLINE_TIMER;
316 }
317
318 /* x2apic is reported by GET_SUPPORTED_CPUID, but it can't be enabled
319 * without the in-kernel irqchip
320 */
321 if (!kvm_irqchip_in_kernel()) {
322 ret &= ~CPUID_EXT_X2APIC;
323 }
324 } else if (function == 6 && reg == R_EAX) {
325 ret |= CPUID_6_EAX_ARAT; /* safe to allow because of emulated APIC */
326 } else if (function == 0x80000001 && reg == R_EDX) {
327 /* On Intel, kvm returns cpuid according to the Intel spec,
328 * so add missing bits according to the AMD spec:
329 */
330 cpuid_1_edx = kvm_arch_get_supported_cpuid(s, 1, 0, R_EDX);
331 ret |= cpuid_1_edx & CPUID_EXT2_AMD_ALIASES;
332 } else if (function == KVM_CPUID_FEATURES && reg == R_EAX) {
333 /* kvm_pv_unhalt is reported by GET_SUPPORTED_CPUID, but it can't
334 * be enabled without the in-kernel irqchip
335 */
336 if (!kvm_irqchip_in_kernel()) {
337 ret &= ~(1U << KVM_FEATURE_PV_UNHALT);
338 }
339 }
340
341 /* fallback for older kernels */
342 if ((function == KVM_CPUID_FEATURES) && !found) {
343 ret = get_para_features(s);
344 }
345
346 return ret;
347 }
348
349 typedef struct HWPoisonPage {
350 ram_addr_t ram_addr;
351 QLIST_ENTRY(HWPoisonPage) list;
352 } HWPoisonPage;
353
354 static QLIST_HEAD(, HWPoisonPage) hwpoison_page_list =
355 QLIST_HEAD_INITIALIZER(hwpoison_page_list);
356
357 static void kvm_unpoison_all(void *param)
358 {
359 HWPoisonPage *page, *next_page;
360
361 QLIST_FOREACH_SAFE(page, &hwpoison_page_list, list, next_page) {
362 QLIST_REMOVE(page, list);
363 qemu_ram_remap(page->ram_addr, TARGET_PAGE_SIZE);
364 g_free(page);
365 }
366 }
367
368 static void kvm_hwpoison_page_add(ram_addr_t ram_addr)
369 {
370 HWPoisonPage *page;
371
372 QLIST_FOREACH(page, &hwpoison_page_list, list) {
373 if (page->ram_addr == ram_addr) {
374 return;
375 }
376 }
377 page = g_new(HWPoisonPage, 1);
378 page->ram_addr = ram_addr;
379 QLIST_INSERT_HEAD(&hwpoison_page_list, page, list);
380 }
381
382 static int kvm_get_mce_cap_supported(KVMState *s, uint64_t *mce_cap,
383 int *max_banks)
384 {
385 int r;
386
387 r = kvm_check_extension(s, KVM_CAP_MCE);
388 if (r > 0) {
389 *max_banks = r;
390 return kvm_ioctl(s, KVM_X86_GET_MCE_CAP_SUPPORTED, mce_cap);
391 }
392 return -ENOSYS;
393 }
394
395 static void kvm_mce_inject(X86CPU *cpu, hwaddr paddr, int code)
396 {
397 CPUState *cs = CPU(cpu);
398 CPUX86State *env = &cpu->env;
399 uint64_t status = MCI_STATUS_VAL | MCI_STATUS_UC | MCI_STATUS_EN |
400 MCI_STATUS_MISCV | MCI_STATUS_ADDRV | MCI_STATUS_S;
401 uint64_t mcg_status = MCG_STATUS_MCIP;
402 int flags = 0;
403
404 if (code == BUS_MCEERR_AR) {
405 status |= MCI_STATUS_AR | 0x134;
406 mcg_status |= MCG_STATUS_EIPV;
407 } else {
408 status |= 0xc0;
409 mcg_status |= MCG_STATUS_RIPV;
410 }
411
412 flags = cpu_x86_support_mca_broadcast(env) ? MCE_INJECT_BROADCAST : 0;
413 /* We need to read back the value of MSR_EXT_MCG_CTL that was set by the
414 * guest kernel back into env->mcg_ext_ctl.
415 */
416 cpu_synchronize_state(cs);
417 if (env->mcg_ext_ctl & MCG_EXT_CTL_LMCE_EN) {
418 mcg_status |= MCG_STATUS_LMCE;
419 flags = 0;
420 }
421
422 cpu_x86_inject_mce(NULL, cpu, 9, status, mcg_status, paddr,
423 (MCM_ADDR_PHYS << 6) | 0xc, flags);
424 }
425
426 static void hardware_memory_error(void)
427 {
428 fprintf(stderr, "Hardware memory error!\n");
429 exit(1);
430 }
431
432 int kvm_arch_on_sigbus_vcpu(CPUState *c, int code, void *addr)
433 {
434 X86CPU *cpu = X86_CPU(c);
435 CPUX86State *env = &cpu->env;
436 ram_addr_t ram_addr;
437 hwaddr paddr;
438
439 if ((env->mcg_cap & MCG_SER_P) && addr
440 && (code == BUS_MCEERR_AR || code == BUS_MCEERR_AO)) {
441 ram_addr = qemu_ram_addr_from_host(addr);
442 if (ram_addr == RAM_ADDR_INVALID ||
443 !kvm_physical_memory_addr_from_host(c->kvm_state, addr, &paddr)) {
444 fprintf(stderr, "Hardware memory error for memory used by "
445 "QEMU itself instead of guest system!\n");
446 /* Hope we are lucky for AO MCE */
447 if (code == BUS_MCEERR_AO) {
448 return 0;
449 } else {
450 hardware_memory_error();
451 }
452 }
453 kvm_hwpoison_page_add(ram_addr);
454 kvm_mce_inject(cpu, paddr, code);
455 } else {
456 if (code == BUS_MCEERR_AO) {
457 return 0;
458 } else if (code == BUS_MCEERR_AR) {
459 hardware_memory_error();
460 } else {
461 return 1;
462 }
463 }
464 return 0;
465 }
466
467 int kvm_arch_on_sigbus(int code, void *addr)
468 {
469 X86CPU *cpu = X86_CPU(first_cpu);
470
471 if ((cpu->env.mcg_cap & MCG_SER_P) && addr && code == BUS_MCEERR_AO) {
472 ram_addr_t ram_addr;
473 hwaddr paddr;
474
475 /* Hope we are lucky for AO MCE */
476 ram_addr = qemu_ram_addr_from_host(addr);
477 if (ram_addr == RAM_ADDR_INVALID ||
478 !kvm_physical_memory_addr_from_host(first_cpu->kvm_state,
479 addr, &paddr)) {
480 fprintf(stderr, "Hardware memory error for memory used by "
481 "QEMU itself instead of guest system!: %p\n", addr);
482 return 0;
483 }
484 kvm_hwpoison_page_add(ram_addr);
485 kvm_mce_inject(X86_CPU(first_cpu), paddr, code);
486 } else {
487 if (code == BUS_MCEERR_AO) {
488 return 0;
489 } else if (code == BUS_MCEERR_AR) {
490 hardware_memory_error();
491 } else {
492 return 1;
493 }
494 }
495 return 0;
496 }
497
498 static int kvm_inject_mce_oldstyle(X86CPU *cpu)
499 {
500 CPUX86State *env = &cpu->env;
501
502 if (!kvm_has_vcpu_events() && env->exception_injected == EXCP12_MCHK) {
503 unsigned int bank, bank_num = env->mcg_cap & 0xff;
504 struct kvm_x86_mce mce;
505
506 env->exception_injected = -1;
507
508 /*
509 * There must be at least one bank in use if an MCE is pending.
510 * Find it and use its values for the event injection.
511 */
512 for (bank = 0; bank < bank_num; bank++) {
513 if (env->mce_banks[bank * 4 + 1] & MCI_STATUS_VAL) {
514 break;
515 }
516 }
517 assert(bank < bank_num);
518
519 mce.bank = bank;
520 mce.status = env->mce_banks[bank * 4 + 1];
521 mce.mcg_status = env->mcg_status;
522 mce.addr = env->mce_banks[bank * 4 + 2];
523 mce.misc = env->mce_banks[bank * 4 + 3];
524
525 return kvm_vcpu_ioctl(CPU(cpu), KVM_X86_SET_MCE, &mce);
526 }
527 return 0;
528 }
529
530 static void cpu_update_state(void *opaque, int running, RunState state)
531 {
532 CPUX86State *env = opaque;
533
534 if (running) {
535 env->tsc_valid = false;
536 }
537 }
538
539 unsigned long kvm_arch_vcpu_id(CPUState *cs)
540 {
541 X86CPU *cpu = X86_CPU(cs);
542 return cpu->apic_id;
543 }
544
545 #ifndef KVM_CPUID_SIGNATURE_NEXT
546 #define KVM_CPUID_SIGNATURE_NEXT 0x40000100
547 #endif
548
549 static bool hyperv_hypercall_available(X86CPU *cpu)
550 {
551 return cpu->hyperv_vapic ||
552 (cpu->hyperv_spinlock_attempts != HYPERV_SPINLOCK_NEVER_RETRY);
553 }
554
555 static bool hyperv_enabled(X86CPU *cpu)
556 {
557 CPUState *cs = CPU(cpu);
558 return kvm_check_extension(cs->kvm_state, KVM_CAP_HYPERV) > 0 &&
559 (hyperv_hypercall_available(cpu) ||
560 cpu->hyperv_time ||
561 cpu->hyperv_relaxed_timing ||
562 cpu->hyperv_crash ||
563 cpu->hyperv_reset ||
564 cpu->hyperv_vpindex ||
565 cpu->hyperv_runtime ||
566 cpu->hyperv_synic ||
567 cpu->hyperv_stimer);
568 }
569
570 static int kvm_arch_set_tsc_khz(CPUState *cs)
571 {
572 X86CPU *cpu = X86_CPU(cs);
573 CPUX86State *env = &cpu->env;
574 int r;
575
576 if (!env->tsc_khz) {
577 return 0;
578 }
579
580 r = kvm_check_extension(cs->kvm_state, KVM_CAP_TSC_CONTROL) ?
581 kvm_vcpu_ioctl(cs, KVM_SET_TSC_KHZ, env->tsc_khz) :
582 -ENOTSUP;
583 if (r < 0) {
584 /* When KVM_SET_TSC_KHZ fails, it's an error only if the current
585 * TSC frequency doesn't match the one we want.
586 */
587 int cur_freq = kvm_check_extension(cs->kvm_state, KVM_CAP_GET_TSC_KHZ) ?
588 kvm_vcpu_ioctl(cs, KVM_GET_TSC_KHZ) :
589 -ENOTSUP;
590 if (cur_freq <= 0 || cur_freq != env->tsc_khz) {
591 error_report("warning: TSC frequency mismatch between "
592 "VM (%" PRId64 " kHz) and host (%d kHz), "
593 "and TSC scaling unavailable",
594 env->tsc_khz, cur_freq);
595 return r;
596 }
597 }
598
599 return 0;
600 }
601
602 static int hyperv_handle_properties(CPUState *cs)
603 {
604 X86CPU *cpu = X86_CPU(cs);
605 CPUX86State *env = &cpu->env;
606
607 if (cpu->hyperv_relaxed_timing) {
608 env->features[FEAT_HYPERV_EAX] |= HV_X64_MSR_HYPERCALL_AVAILABLE;
609 }
610 if (cpu->hyperv_vapic) {
611 env->features[FEAT_HYPERV_EAX] |= HV_X64_MSR_HYPERCALL_AVAILABLE;
612 env->features[FEAT_HYPERV_EAX] |= HV_X64_MSR_APIC_ACCESS_AVAILABLE;
613 has_msr_hv_vapic = true;
614 }
615 if (cpu->hyperv_time &&
616 kvm_check_extension(cs->kvm_state, KVM_CAP_HYPERV_TIME) > 0) {
617 env->features[FEAT_HYPERV_EAX] |= HV_X64_MSR_HYPERCALL_AVAILABLE;
618 env->features[FEAT_HYPERV_EAX] |= HV_X64_MSR_TIME_REF_COUNT_AVAILABLE;
619 env->features[FEAT_HYPERV_EAX] |= 0x200;
620 has_msr_hv_tsc = true;
621 }
622 if (cpu->hyperv_crash && has_msr_hv_crash) {
623 env->features[FEAT_HYPERV_EDX] |= HV_X64_GUEST_CRASH_MSR_AVAILABLE;
624 }
625 env->features[FEAT_HYPERV_EDX] |= HV_X64_CPU_DYNAMIC_PARTITIONING_AVAILABLE;
626 if (cpu->hyperv_reset && has_msr_hv_reset) {
627 env->features[FEAT_HYPERV_EAX] |= HV_X64_MSR_RESET_AVAILABLE;
628 }
629 if (cpu->hyperv_vpindex && has_msr_hv_vpindex) {
630 env->features[FEAT_HYPERV_EAX] |= HV_X64_MSR_VP_INDEX_AVAILABLE;
631 }
632 if (cpu->hyperv_runtime && has_msr_hv_runtime) {
633 env->features[FEAT_HYPERV_EAX] |= HV_X64_MSR_VP_RUNTIME_AVAILABLE;
634 }
635 if (cpu->hyperv_synic) {
636 int sint;
637
638 if (!has_msr_hv_synic ||
639 kvm_vcpu_enable_cap(cs, KVM_CAP_HYPERV_SYNIC, 0)) {
640 fprintf(stderr, "Hyper-V SynIC is not supported by kernel\n");
641 return -ENOSYS;
642 }
643
644 env->features[FEAT_HYPERV_EAX] |= HV_X64_MSR_SYNIC_AVAILABLE;
645 env->msr_hv_synic_version = HV_SYNIC_VERSION_1;
646 for (sint = 0; sint < ARRAY_SIZE(env->msr_hv_synic_sint); sint++) {
647 env->msr_hv_synic_sint[sint] = HV_SYNIC_SINT_MASKED;
648 }
649 }
650 if (cpu->hyperv_stimer) {
651 if (!has_msr_hv_stimer) {
652 fprintf(stderr, "Hyper-V timers aren't supported by kernel\n");
653 return -ENOSYS;
654 }
655 env->features[FEAT_HYPERV_EAX] |= HV_X64_MSR_SYNTIMER_AVAILABLE;
656 }
657 return 0;
658 }
659
660 static Error *invtsc_mig_blocker;
661
662 #define KVM_MAX_CPUID_ENTRIES 100
663
664 int kvm_arch_init_vcpu(CPUState *cs)
665 {
666 struct {
667 struct kvm_cpuid2 cpuid;
668 struct kvm_cpuid_entry2 entries[KVM_MAX_CPUID_ENTRIES];
669 } QEMU_PACKED cpuid_data;
670 X86CPU *cpu = X86_CPU(cs);
671 CPUX86State *env = &cpu->env;
672 uint32_t limit, i, j, cpuid_i;
673 uint32_t unused;
674 struct kvm_cpuid_entry2 *c;
675 uint32_t signature[3];
676 int kvm_base = KVM_CPUID_SIGNATURE;
677 int r;
678
679 memset(&cpuid_data, 0, sizeof(cpuid_data));
680
681 cpuid_i = 0;
682
683 /* Paravirtualization CPUIDs */
684 if (hyperv_enabled(cpu)) {
685 c = &cpuid_data.entries[cpuid_i++];
686 c->function = HYPERV_CPUID_VENDOR_AND_MAX_FUNCTIONS;
687 if (!cpu->hyperv_vendor_id) {
688 memcpy(signature, "Microsoft Hv", 12);
689 } else {
690 size_t len = strlen(cpu->hyperv_vendor_id);
691
692 if (len > 12) {
693 error_report("hv-vendor-id truncated to 12 characters");
694 len = 12;
695 }
696 memset(signature, 0, 12);
697 memcpy(signature, cpu->hyperv_vendor_id, len);
698 }
699 c->eax = HYPERV_CPUID_MIN;
700 c->ebx = signature[0];
701 c->ecx = signature[1];
702 c->edx = signature[2];
703
704 c = &cpuid_data.entries[cpuid_i++];
705 c->function = HYPERV_CPUID_INTERFACE;
706 memcpy(signature, "Hv#1\0\0\0\0\0\0\0\0", 12);
707 c->eax = signature[0];
708 c->ebx = 0;
709 c->ecx = 0;
710 c->edx = 0;
711
712 c = &cpuid_data.entries[cpuid_i++];
713 c->function = HYPERV_CPUID_VERSION;
714 c->eax = 0x00001bbc;
715 c->ebx = 0x00060001;
716
717 c = &cpuid_data.entries[cpuid_i++];
718 c->function = HYPERV_CPUID_FEATURES;
719 r = hyperv_handle_properties(cs);
720 if (r) {
721 return r;
722 }
723 c->eax = env->features[FEAT_HYPERV_EAX];
724 c->ebx = env->features[FEAT_HYPERV_EBX];
725 c->edx = env->features[FEAT_HYPERV_EDX];
726
727 c = &cpuid_data.entries[cpuid_i++];
728 c->function = HYPERV_CPUID_ENLIGHTMENT_INFO;
729 if (cpu->hyperv_relaxed_timing) {
730 c->eax |= HV_X64_RELAXED_TIMING_RECOMMENDED;
731 }
732 if (has_msr_hv_vapic) {
733 c->eax |= HV_X64_APIC_ACCESS_RECOMMENDED;
734 }
735 c->ebx = cpu->hyperv_spinlock_attempts;
736
737 c = &cpuid_data.entries[cpuid_i++];
738 c->function = HYPERV_CPUID_IMPLEMENT_LIMITS;
739 c->eax = 0x40;
740 c->ebx = 0x40;
741
742 kvm_base = KVM_CPUID_SIGNATURE_NEXT;
743 has_msr_hv_hypercall = true;
744 }
745
746 if (cpu->expose_kvm) {
747 memcpy(signature, "KVMKVMKVM\0\0\0", 12);
748 c = &cpuid_data.entries[cpuid_i++];
749 c->function = KVM_CPUID_SIGNATURE | kvm_base;
750 c->eax = KVM_CPUID_FEATURES | kvm_base;
751 c->ebx = signature[0];
752 c->ecx = signature[1];
753 c->edx = signature[2];
754
755 c = &cpuid_data.entries[cpuid_i++];
756 c->function = KVM_CPUID_FEATURES | kvm_base;
757 c->eax = env->features[FEAT_KVM];
758
759 has_msr_async_pf_en = c->eax & (1 << KVM_FEATURE_ASYNC_PF);
760
761 has_msr_pv_eoi_en = c->eax & (1 << KVM_FEATURE_PV_EOI);
762
763 has_msr_kvm_steal_time = c->eax & (1 << KVM_FEATURE_STEAL_TIME);
764 }
765
766 cpu_x86_cpuid(env, 0, 0, &limit, &unused, &unused, &unused);
767
768 for (i = 0; i <= limit; i++) {
769 if (cpuid_i == KVM_MAX_CPUID_ENTRIES) {
770 fprintf(stderr, "unsupported level value: 0x%x\n", limit);
771 abort();
772 }
773 c = &cpuid_data.entries[cpuid_i++];
774
775 switch (i) {
776 case 2: {
777 /* Keep reading function 2 till all the input is received */
778 int times;
779
780 c->function = i;
781 c->flags = KVM_CPUID_FLAG_STATEFUL_FUNC |
782 KVM_CPUID_FLAG_STATE_READ_NEXT;
783 cpu_x86_cpuid(env, i, 0, &c->eax, &c->ebx, &c->ecx, &c->edx);
784 times = c->eax & 0xff;
785
786 for (j = 1; j < times; ++j) {
787 if (cpuid_i == KVM_MAX_CPUID_ENTRIES) {
788 fprintf(stderr, "cpuid_data is full, no space for "
789 "cpuid(eax:2):eax & 0xf = 0x%x\n", times);
790 abort();
791 }
792 c = &cpuid_data.entries[cpuid_i++];
793 c->function = i;
794 c->flags = KVM_CPUID_FLAG_STATEFUL_FUNC;
795 cpu_x86_cpuid(env, i, 0, &c->eax, &c->ebx, &c->ecx, &c->edx);
796 }
797 break;
798 }
799 case 4:
800 case 0xb:
801 case 0xd:
802 for (j = 0; ; j++) {
803 if (i == 0xd && j == 64) {
804 break;
805 }
806 c->function = i;
807 c->flags = KVM_CPUID_FLAG_SIGNIFCANT_INDEX;
808 c->index = j;
809 cpu_x86_cpuid(env, i, j, &c->eax, &c->ebx, &c->ecx, &c->edx);
810
811 if (i == 4 && c->eax == 0) {
812 break;
813 }
814 if (i == 0xb && !(c->ecx & 0xff00)) {
815 break;
816 }
817 if (i == 0xd && c->eax == 0) {
818 continue;
819 }
820 if (cpuid_i == KVM_MAX_CPUID_ENTRIES) {
821 fprintf(stderr, "cpuid_data is full, no space for "
822 "cpuid(eax:0x%x,ecx:0x%x)\n", i, j);
823 abort();
824 }
825 c = &cpuid_data.entries[cpuid_i++];
826 }
827 break;
828 default:
829 c->function = i;
830 c->flags = 0;
831 cpu_x86_cpuid(env, i, 0, &c->eax, &c->ebx, &c->ecx, &c->edx);
832 break;
833 }
834 }
835
836 if (limit >= 0x0a) {
837 uint32_t ver;
838
839 cpu_x86_cpuid(env, 0x0a, 0, &ver, &unused, &unused, &unused);
840 if ((ver & 0xff) > 0) {
841 has_msr_architectural_pmu = true;
842 num_architectural_pmu_counters = (ver & 0xff00) >> 8;
843
844 /* Shouldn't be more than 32, since that's the number of bits
845 * available in EBX to tell us _which_ counters are available.
846 * Play it safe.
847 */
848 if (num_architectural_pmu_counters > MAX_GP_COUNTERS) {
849 num_architectural_pmu_counters = MAX_GP_COUNTERS;
850 }
851 }
852 }
853
854 cpu_x86_cpuid(env, 0x80000000, 0, &limit, &unused, &unused, &unused);
855
856 for (i = 0x80000000; i <= limit; i++) {
857 if (cpuid_i == KVM_MAX_CPUID_ENTRIES) {
858 fprintf(stderr, "unsupported xlevel value: 0x%x\n", limit);
859 abort();
860 }
861 c = &cpuid_data.entries[cpuid_i++];
862
863 c->function = i;
864 c->flags = 0;
865 cpu_x86_cpuid(env, i, 0, &c->eax, &c->ebx, &c->ecx, &c->edx);
866 }
867
868 /* Call Centaur's CPUID instructions they are supported. */
869 if (env->cpuid_xlevel2 > 0) {
870 cpu_x86_cpuid(env, 0xC0000000, 0, &limit, &unused, &unused, &unused);
871
872 for (i = 0xC0000000; i <= limit; i++) {
873 if (cpuid_i == KVM_MAX_CPUID_ENTRIES) {
874 fprintf(stderr, "unsupported xlevel2 value: 0x%x\n", limit);
875 abort();
876 }
877 c = &cpuid_data.entries[cpuid_i++];
878
879 c->function = i;
880 c->flags = 0;
881 cpu_x86_cpuid(env, i, 0, &c->eax, &c->ebx, &c->ecx, &c->edx);
882 }
883 }
884
885 cpuid_data.cpuid.nent = cpuid_i;
886
887 if (((env->cpuid_version >> 8)&0xF) >= 6
888 && (env->features[FEAT_1_EDX] & (CPUID_MCE | CPUID_MCA)) ==
889 (CPUID_MCE | CPUID_MCA)
890 && kvm_check_extension(cs->kvm_state, KVM_CAP_MCE) > 0) {
891 uint64_t mcg_cap, unsupported_caps;
892 int banks;
893 int ret;
894
895 ret = kvm_get_mce_cap_supported(cs->kvm_state, &mcg_cap, &banks);
896 if (ret < 0) {
897 fprintf(stderr, "kvm_get_mce_cap_supported: %s", strerror(-ret));
898 return ret;
899 }
900
901 if (banks < (env->mcg_cap & MCG_CAP_BANKS_MASK)) {
902 error_report("kvm: Unsupported MCE bank count (QEMU = %d, KVM = %d)",
903 (int)(env->mcg_cap & MCG_CAP_BANKS_MASK), banks);
904 return -ENOTSUP;
905 }
906
907 unsupported_caps = env->mcg_cap & ~(mcg_cap | MCG_CAP_BANKS_MASK);
908 if (unsupported_caps) {
909 if (unsupported_caps & MCG_LMCE_P) {
910 error_report("kvm: LMCE not supported");
911 return -ENOTSUP;
912 }
913 error_report("warning: Unsupported MCG_CAP bits: 0x%" PRIx64,
914 unsupported_caps);
915 }
916
917 env->mcg_cap &= mcg_cap | MCG_CAP_BANKS_MASK;
918 ret = kvm_vcpu_ioctl(cs, KVM_X86_SETUP_MCE, &env->mcg_cap);
919 if (ret < 0) {
920 fprintf(stderr, "KVM_X86_SETUP_MCE: %s", strerror(-ret));
921 return ret;
922 }
923 }
924
925 qemu_add_vm_change_state_handler(cpu_update_state, env);
926
927 c = cpuid_find_entry(&cpuid_data.cpuid, 1, 0);
928 if (c) {
929 has_msr_feature_control = !!(c->ecx & CPUID_EXT_VMX) ||
930 !!(c->ecx & CPUID_EXT_SMX);
931 }
932
933 if (env->mcg_cap & MCG_LMCE_P) {
934 has_msr_mcg_ext_ctl = has_msr_feature_control = true;
935 }
936
937 c = cpuid_find_entry(&cpuid_data.cpuid, 0x80000007, 0);
938 if (c && (c->edx & 1<<8) && invtsc_mig_blocker == NULL) {
939 /* for migration */
940 error_setg(&invtsc_mig_blocker,
941 "State blocked by non-migratable CPU device"
942 " (invtsc flag)");
943 migrate_add_blocker(invtsc_mig_blocker);
944 /* for savevm */
945 vmstate_x86_cpu.unmigratable = 1;
946 }
947
948 cpuid_data.cpuid.padding = 0;
949 r = kvm_vcpu_ioctl(cs, KVM_SET_CPUID2, &cpuid_data);
950 if (r) {
951 return r;
952 }
953
954 r = kvm_arch_set_tsc_khz(cs);
955 if (r < 0) {
956 return r;
957 }
958
959 /* vcpu's TSC frequency is either specified by user, or following
960 * the value used by KVM if the former is not present. In the
961 * latter case, we query it from KVM and record in env->tsc_khz,
962 * so that vcpu's TSC frequency can be migrated later via this field.
963 */
964 if (!env->tsc_khz) {
965 r = kvm_check_extension(cs->kvm_state, KVM_CAP_GET_TSC_KHZ) ?
966 kvm_vcpu_ioctl(cs, KVM_GET_TSC_KHZ) :
967 -ENOTSUP;
968 if (r > 0) {
969 env->tsc_khz = r;
970 }
971 }
972
973 if (has_xsave) {
974 env->kvm_xsave_buf = qemu_memalign(4096, sizeof(struct kvm_xsave));
975 }
976 cpu->kvm_msr_buf = g_malloc0(MSR_BUF_SIZE);
977
978 if (env->features[FEAT_1_EDX] & CPUID_MTRR) {
979 has_msr_mtrr = true;
980 }
981 if (!(env->features[FEAT_8000_0001_EDX] & CPUID_EXT2_RDTSCP)) {
982 has_msr_tsc_aux = false;
983 }
984
985 return 0;
986 }
987
988 void kvm_arch_reset_vcpu(X86CPU *cpu)
989 {
990 CPUX86State *env = &cpu->env;
991
992 env->exception_injected = -1;
993 env->interrupt_injected = -1;
994 env->xcr0 = 1;
995 if (kvm_irqchip_in_kernel()) {
996 env->mp_state = cpu_is_bsp(cpu) ? KVM_MP_STATE_RUNNABLE :
997 KVM_MP_STATE_UNINITIALIZED;
998 } else {
999 env->mp_state = KVM_MP_STATE_RUNNABLE;
1000 }
1001 }
1002
1003 void kvm_arch_do_init_vcpu(X86CPU *cpu)
1004 {
1005 CPUX86State *env = &cpu->env;
1006
1007 /* APs get directly into wait-for-SIPI state. */
1008 if (env->mp_state == KVM_MP_STATE_UNINITIALIZED) {
1009 env->mp_state = KVM_MP_STATE_INIT_RECEIVED;
1010 }
1011 }
1012
1013 static int kvm_get_supported_msrs(KVMState *s)
1014 {
1015 static int kvm_supported_msrs;
1016 int ret = 0;
1017
1018 /* first time */
1019 if (kvm_supported_msrs == 0) {
1020 struct kvm_msr_list msr_list, *kvm_msr_list;
1021
1022 kvm_supported_msrs = -1;
1023
1024 /* Obtain MSR list from KVM. These are the MSRs that we must
1025 * save/restore */
1026 msr_list.nmsrs = 0;
1027 ret = kvm_ioctl(s, KVM_GET_MSR_INDEX_LIST, &msr_list);
1028 if (ret < 0 && ret != -E2BIG) {
1029 return ret;
1030 }
1031 /* Old kernel modules had a bug and could write beyond the provided
1032 memory. Allocate at least a safe amount of 1K. */
1033 kvm_msr_list = g_malloc0(MAX(1024, sizeof(msr_list) +
1034 msr_list.nmsrs *
1035 sizeof(msr_list.indices[0])));
1036
1037 kvm_msr_list->nmsrs = msr_list.nmsrs;
1038 ret = kvm_ioctl(s, KVM_GET_MSR_INDEX_LIST, kvm_msr_list);
1039 if (ret >= 0) {
1040 int i;
1041
1042 for (i = 0; i < kvm_msr_list->nmsrs; i++) {
1043 if (kvm_msr_list->indices[i] == MSR_STAR) {
1044 has_msr_star = true;
1045 continue;
1046 }
1047 if (kvm_msr_list->indices[i] == MSR_VM_HSAVE_PA) {
1048 has_msr_hsave_pa = true;
1049 continue;
1050 }
1051 if (kvm_msr_list->indices[i] == MSR_TSC_AUX) {
1052 has_msr_tsc_aux = true;
1053 continue;
1054 }
1055 if (kvm_msr_list->indices[i] == MSR_TSC_ADJUST) {
1056 has_msr_tsc_adjust = true;
1057 continue;
1058 }
1059 if (kvm_msr_list->indices[i] == MSR_IA32_TSCDEADLINE) {
1060 has_msr_tsc_deadline = true;
1061 continue;
1062 }
1063 if (kvm_msr_list->indices[i] == MSR_IA32_SMBASE) {
1064 has_msr_smbase = true;
1065 continue;
1066 }
1067 if (kvm_msr_list->indices[i] == MSR_IA32_MISC_ENABLE) {
1068 has_msr_misc_enable = true;
1069 continue;
1070 }
1071 if (kvm_msr_list->indices[i] == MSR_IA32_BNDCFGS) {
1072 has_msr_bndcfgs = true;
1073 continue;
1074 }
1075 if (kvm_msr_list->indices[i] == MSR_IA32_XSS) {
1076 has_msr_xss = true;
1077 continue;
1078 }
1079 if (kvm_msr_list->indices[i] == HV_X64_MSR_CRASH_CTL) {
1080 has_msr_hv_crash = true;
1081 continue;
1082 }
1083 if (kvm_msr_list->indices[i] == HV_X64_MSR_RESET) {
1084 has_msr_hv_reset = true;
1085 continue;
1086 }
1087 if (kvm_msr_list->indices[i] == HV_X64_MSR_VP_INDEX) {
1088 has_msr_hv_vpindex = true;
1089 continue;
1090 }
1091 if (kvm_msr_list->indices[i] == HV_X64_MSR_VP_RUNTIME) {
1092 has_msr_hv_runtime = true;
1093 continue;
1094 }
1095 if (kvm_msr_list->indices[i] == HV_X64_MSR_SCONTROL) {
1096 has_msr_hv_synic = true;
1097 continue;
1098 }
1099 if (kvm_msr_list->indices[i] == HV_X64_MSR_STIMER0_CONFIG) {
1100 has_msr_hv_stimer = true;
1101 continue;
1102 }
1103 }
1104 }
1105
1106 g_free(kvm_msr_list);
1107 }
1108
1109 return ret;
1110 }
1111
1112 static Notifier smram_machine_done;
1113 static KVMMemoryListener smram_listener;
1114 static AddressSpace smram_address_space;
1115 static MemoryRegion smram_as_root;
1116 static MemoryRegion smram_as_mem;
1117
1118 static void register_smram_listener(Notifier *n, void *unused)
1119 {
1120 MemoryRegion *smram =
1121 (MemoryRegion *) object_resolve_path("/machine/smram", NULL);
1122
1123 /* Outer container... */
1124 memory_region_init(&smram_as_root, OBJECT(kvm_state), "mem-container-smram", ~0ull);
1125 memory_region_set_enabled(&smram_as_root, true);
1126
1127 /* ... with two regions inside: normal system memory with low
1128 * priority, and...
1129 */
1130 memory_region_init_alias(&smram_as_mem, OBJECT(kvm_state), "mem-smram",
1131 get_system_memory(), 0, ~0ull);
1132 memory_region_add_subregion_overlap(&smram_as_root, 0, &smram_as_mem, 0);
1133 memory_region_set_enabled(&smram_as_mem, true);
1134
1135 if (smram) {
1136 /* ... SMRAM with higher priority */
1137 memory_region_add_subregion_overlap(&smram_as_root, 0, smram, 10);
1138 memory_region_set_enabled(smram, true);
1139 }
1140
1141 address_space_init(&smram_address_space, &smram_as_root, "KVM-SMRAM");
1142 kvm_memory_listener_register(kvm_state, &smram_listener,
1143 &smram_address_space, 1);
1144 }
1145
1146 int kvm_arch_init(MachineState *ms, KVMState *s)
1147 {
1148 uint64_t identity_base = 0xfffbc000;
1149 uint64_t shadow_mem;
1150 int ret;
1151 struct utsname utsname;
1152
1153 #ifdef KVM_CAP_XSAVE
1154 has_xsave = kvm_check_extension(s, KVM_CAP_XSAVE);
1155 #endif
1156
1157 #ifdef KVM_CAP_XCRS
1158 has_xcrs = kvm_check_extension(s, KVM_CAP_XCRS);
1159 #endif
1160
1161 #ifdef KVM_CAP_PIT_STATE2
1162 has_pit_state2 = kvm_check_extension(s, KVM_CAP_PIT_STATE2);
1163 #endif
1164
1165 ret = kvm_get_supported_msrs(s);
1166 if (ret < 0) {
1167 return ret;
1168 }
1169
1170 uname(&utsname);
1171 lm_capable_kernel = strcmp(utsname.machine, "x86_64") == 0;
1172
1173 /*
1174 * On older Intel CPUs, KVM uses vm86 mode to emulate 16-bit code directly.
1175 * In order to use vm86 mode, an EPT identity map and a TSS are needed.
1176 * Since these must be part of guest physical memory, we need to allocate
1177 * them, both by setting their start addresses in the kernel and by
1178 * creating a corresponding e820 entry. We need 4 pages before the BIOS.
1179 *
1180 * Older KVM versions may not support setting the identity map base. In
1181 * that case we need to stick with the default, i.e. a 256K maximum BIOS
1182 * size.
1183 */
1184 if (kvm_check_extension(s, KVM_CAP_SET_IDENTITY_MAP_ADDR)) {
1185 /* Allows up to 16M BIOSes. */
1186 identity_base = 0xfeffc000;
1187
1188 ret = kvm_vm_ioctl(s, KVM_SET_IDENTITY_MAP_ADDR, &identity_base);
1189 if (ret < 0) {
1190 return ret;
1191 }
1192 }
1193
1194 /* Set TSS base one page after EPT identity map. */
1195 ret = kvm_vm_ioctl(s, KVM_SET_TSS_ADDR, identity_base + 0x1000);
1196 if (ret < 0) {
1197 return ret;
1198 }
1199
1200 /* Tell fw_cfg to notify the BIOS to reserve the range. */
1201 ret = e820_add_entry(identity_base, 0x4000, E820_RESERVED);
1202 if (ret < 0) {
1203 fprintf(stderr, "e820_add_entry() table is full\n");
1204 return ret;
1205 }
1206 qemu_register_reset(kvm_unpoison_all, NULL);
1207
1208 shadow_mem = machine_kvm_shadow_mem(ms);
1209 if (shadow_mem != -1) {
1210 shadow_mem /= 4096;
1211 ret = kvm_vm_ioctl(s, KVM_SET_NR_MMU_PAGES, shadow_mem);
1212 if (ret < 0) {
1213 return ret;
1214 }
1215 }
1216
1217 if (kvm_check_extension(s, KVM_CAP_X86_SMM)) {
1218 smram_machine_done.notify = register_smram_listener;
1219 qemu_add_machine_init_done_notifier(&smram_machine_done);
1220 }
1221 return 0;
1222 }
1223
1224 static void set_v8086_seg(struct kvm_segment *lhs, const SegmentCache *rhs)
1225 {
1226 lhs->selector = rhs->selector;
1227 lhs->base = rhs->base;
1228 lhs->limit = rhs->limit;
1229 lhs->type = 3;
1230 lhs->present = 1;
1231 lhs->dpl = 3;
1232 lhs->db = 0;
1233 lhs->s = 1;
1234 lhs->l = 0;
1235 lhs->g = 0;
1236 lhs->avl = 0;
1237 lhs->unusable = 0;
1238 }
1239
1240 static void set_seg(struct kvm_segment *lhs, const SegmentCache *rhs)
1241 {
1242 unsigned flags = rhs->flags;
1243 lhs->selector = rhs->selector;
1244 lhs->base = rhs->base;
1245 lhs->limit = rhs->limit;
1246 lhs->type = (flags >> DESC_TYPE_SHIFT) & 15;
1247 lhs->present = (flags & DESC_P_MASK) != 0;
1248 lhs->dpl = (flags >> DESC_DPL_SHIFT) & 3;
1249 lhs->db = (flags >> DESC_B_SHIFT) & 1;
1250 lhs->s = (flags & DESC_S_MASK) != 0;
1251 lhs->l = (flags >> DESC_L_SHIFT) & 1;
1252 lhs->g = (flags & DESC_G_MASK) != 0;
1253 lhs->avl = (flags & DESC_AVL_MASK) != 0;
1254 lhs->unusable = !lhs->present;
1255 lhs->padding = 0;
1256 }
1257
1258 static void get_seg(SegmentCache *lhs, const struct kvm_segment *rhs)
1259 {
1260 lhs->selector = rhs->selector;
1261 lhs->base = rhs->base;
1262 lhs->limit = rhs->limit;
1263 if (rhs->unusable) {
1264 lhs->flags = 0;
1265 } else {
1266 lhs->flags = (rhs->type << DESC_TYPE_SHIFT) |
1267 (rhs->present * DESC_P_MASK) |
1268 (rhs->dpl << DESC_DPL_SHIFT) |
1269 (rhs->db << DESC_B_SHIFT) |
1270 (rhs->s * DESC_S_MASK) |
1271 (rhs->l << DESC_L_SHIFT) |
1272 (rhs->g * DESC_G_MASK) |
1273 (rhs->avl * DESC_AVL_MASK);
1274 }
1275 }
1276
1277 static void kvm_getput_reg(__u64 *kvm_reg, target_ulong *qemu_reg, int set)
1278 {
1279 if (set) {
1280 *kvm_reg = *qemu_reg;
1281 } else {
1282 *qemu_reg = *kvm_reg;
1283 }
1284 }
1285
1286 static int kvm_getput_regs(X86CPU *cpu, int set)
1287 {
1288 CPUX86State *env = &cpu->env;
1289 struct kvm_regs regs;
1290 int ret = 0;
1291
1292 if (!set) {
1293 ret = kvm_vcpu_ioctl(CPU(cpu), KVM_GET_REGS, &regs);
1294 if (ret < 0) {
1295 return ret;
1296 }
1297 }
1298
1299 kvm_getput_reg(&regs.rax, &env->regs[R_EAX], set);
1300 kvm_getput_reg(&regs.rbx, &env->regs[R_EBX], set);
1301 kvm_getput_reg(&regs.rcx, &env->regs[R_ECX], set);
1302 kvm_getput_reg(&regs.rdx, &env->regs[R_EDX], set);
1303 kvm_getput_reg(&regs.rsi, &env->regs[R_ESI], set);
1304 kvm_getput_reg(&regs.rdi, &env->regs[R_EDI], set);
1305 kvm_getput_reg(&regs.rsp, &env->regs[R_ESP], set);
1306 kvm_getput_reg(&regs.rbp, &env->regs[R_EBP], set);
1307 #ifdef TARGET_X86_64
1308 kvm_getput_reg(&regs.r8, &env->regs[8], set);
1309 kvm_getput_reg(&regs.r9, &env->regs[9], set);
1310 kvm_getput_reg(&regs.r10, &env->regs[10], set);
1311 kvm_getput_reg(&regs.r11, &env->regs[11], set);
1312 kvm_getput_reg(&regs.r12, &env->regs[12], set);
1313 kvm_getput_reg(&regs.r13, &env->regs[13], set);
1314 kvm_getput_reg(&regs.r14, &env->regs[14], set);
1315 kvm_getput_reg(&regs.r15, &env->regs[15], set);
1316 #endif
1317
1318 kvm_getput_reg(&regs.rflags, &env->eflags, set);
1319 kvm_getput_reg(&regs.rip, &env->eip, set);
1320
1321 if (set) {
1322 ret = kvm_vcpu_ioctl(CPU(cpu), KVM_SET_REGS, &regs);
1323 }
1324
1325 return ret;
1326 }
1327
1328 static int kvm_put_fpu(X86CPU *cpu)
1329 {
1330 CPUX86State *env = &cpu->env;
1331 struct kvm_fpu fpu;
1332 int i;
1333
1334 memset(&fpu, 0, sizeof fpu);
1335 fpu.fsw = env->fpus & ~(7 << 11);
1336 fpu.fsw |= (env->fpstt & 7) << 11;
1337 fpu.fcw = env->fpuc;
1338 fpu.last_opcode = env->fpop;
1339 fpu.last_ip = env->fpip;
1340 fpu.last_dp = env->fpdp;
1341 for (i = 0; i < 8; ++i) {
1342 fpu.ftwx |= (!env->fptags[i]) << i;
1343 }
1344 memcpy(fpu.fpr, env->fpregs, sizeof env->fpregs);
1345 for (i = 0; i < CPU_NB_REGS; i++) {
1346 stq_p(&fpu.xmm[i][0], env->xmm_regs[i].ZMM_Q(0));
1347 stq_p(&fpu.xmm[i][8], env->xmm_regs[i].ZMM_Q(1));
1348 }
1349 fpu.mxcsr = env->mxcsr;
1350
1351 return kvm_vcpu_ioctl(CPU(cpu), KVM_SET_FPU, &fpu);
1352 }
1353
1354 #define XSAVE_FCW_FSW 0
1355 #define XSAVE_FTW_FOP 1
1356 #define XSAVE_CWD_RIP 2
1357 #define XSAVE_CWD_RDP 4
1358 #define XSAVE_MXCSR 6
1359 #define XSAVE_ST_SPACE 8
1360 #define XSAVE_XMM_SPACE 40
1361 #define XSAVE_XSTATE_BV 128
1362 #define XSAVE_YMMH_SPACE 144
1363 #define XSAVE_BNDREGS 240
1364 #define XSAVE_BNDCSR 256
1365 #define XSAVE_OPMASK 272
1366 #define XSAVE_ZMM_Hi256 288
1367 #define XSAVE_Hi16_ZMM 416
1368 #define XSAVE_PKRU 672
1369
1370 #define XSAVE_BYTE_OFFSET(word_offset) \
1371 ((word_offset) * sizeof(((struct kvm_xsave *)0)->region[0]))
1372
1373 #define ASSERT_OFFSET(word_offset, field) \
1374 QEMU_BUILD_BUG_ON(XSAVE_BYTE_OFFSET(word_offset) != \
1375 offsetof(X86XSaveArea, field))
1376
1377 ASSERT_OFFSET(XSAVE_FCW_FSW, legacy.fcw);
1378 ASSERT_OFFSET(XSAVE_FTW_FOP, legacy.ftw);
1379 ASSERT_OFFSET(XSAVE_CWD_RIP, legacy.fpip);
1380 ASSERT_OFFSET(XSAVE_CWD_RDP, legacy.fpdp);
1381 ASSERT_OFFSET(XSAVE_MXCSR, legacy.mxcsr);
1382 ASSERT_OFFSET(XSAVE_ST_SPACE, legacy.fpregs);
1383 ASSERT_OFFSET(XSAVE_XMM_SPACE, legacy.xmm_regs);
1384 ASSERT_OFFSET(XSAVE_XSTATE_BV, header.xstate_bv);
1385 ASSERT_OFFSET(XSAVE_YMMH_SPACE, avx_state);
1386 ASSERT_OFFSET(XSAVE_BNDREGS, bndreg_state);
1387 ASSERT_OFFSET(XSAVE_BNDCSR, bndcsr_state);
1388 ASSERT_OFFSET(XSAVE_OPMASK, opmask_state);
1389 ASSERT_OFFSET(XSAVE_ZMM_Hi256, zmm_hi256_state);
1390 ASSERT_OFFSET(XSAVE_Hi16_ZMM, hi16_zmm_state);
1391 ASSERT_OFFSET(XSAVE_PKRU, pkru_state);
1392
1393 static int kvm_put_xsave(X86CPU *cpu)
1394 {
1395 CPUX86State *env = &cpu->env;
1396 X86XSaveArea *xsave = env->kvm_xsave_buf;
1397 uint16_t cwd, swd, twd;
1398 int i;
1399
1400 if (!has_xsave) {
1401 return kvm_put_fpu(cpu);
1402 }
1403
1404 memset(xsave, 0, sizeof(struct kvm_xsave));
1405 twd = 0;
1406 swd = env->fpus & ~(7 << 11);
1407 swd |= (env->fpstt & 7) << 11;
1408 cwd = env->fpuc;
1409 for (i = 0; i < 8; ++i) {
1410 twd |= (!env->fptags[i]) << i;
1411 }
1412 xsave->legacy.fcw = cwd;
1413 xsave->legacy.fsw = swd;
1414 xsave->legacy.ftw = twd;
1415 xsave->legacy.fpop = env->fpop;
1416 xsave->legacy.fpip = env->fpip;
1417 xsave->legacy.fpdp = env->fpdp;
1418 memcpy(&xsave->legacy.fpregs, env->fpregs,
1419 sizeof env->fpregs);
1420 xsave->legacy.mxcsr = env->mxcsr;
1421 xsave->header.xstate_bv = env->xstate_bv;
1422 memcpy(&xsave->bndreg_state.bnd_regs, env->bnd_regs,
1423 sizeof env->bnd_regs);
1424 xsave->bndcsr_state.bndcsr = env->bndcs_regs;
1425 memcpy(&xsave->opmask_state.opmask_regs, env->opmask_regs,
1426 sizeof env->opmask_regs);
1427
1428 for (i = 0; i < CPU_NB_REGS; i++) {
1429 uint8_t *xmm = xsave->legacy.xmm_regs[i];
1430 uint8_t *ymmh = xsave->avx_state.ymmh[i];
1431 uint8_t *zmmh = xsave->zmm_hi256_state.zmm_hi256[i];
1432 stq_p(xmm, env->xmm_regs[i].ZMM_Q(0));
1433 stq_p(xmm+8, env->xmm_regs[i].ZMM_Q(1));
1434 stq_p(ymmh, env->xmm_regs[i].ZMM_Q(2));
1435 stq_p(ymmh+8, env->xmm_regs[i].ZMM_Q(3));
1436 stq_p(zmmh, env->xmm_regs[i].ZMM_Q(4));
1437 stq_p(zmmh+8, env->xmm_regs[i].ZMM_Q(5));
1438 stq_p(zmmh+16, env->xmm_regs[i].ZMM_Q(6));
1439 stq_p(zmmh+24, env->xmm_regs[i].ZMM_Q(7));
1440 }
1441
1442 #ifdef TARGET_X86_64
1443 memcpy(&xsave->hi16_zmm_state.hi16_zmm, &env->xmm_regs[16],
1444 16 * sizeof env->xmm_regs[16]);
1445 memcpy(&xsave->pkru_state, &env->pkru, sizeof env->pkru);
1446 #endif
1447 return kvm_vcpu_ioctl(CPU(cpu), KVM_SET_XSAVE, xsave);
1448 }
1449
1450 static int kvm_put_xcrs(X86CPU *cpu)
1451 {
1452 CPUX86State *env = &cpu->env;
1453 struct kvm_xcrs xcrs = {};
1454
1455 if (!has_xcrs) {
1456 return 0;
1457 }
1458
1459 xcrs.nr_xcrs = 1;
1460 xcrs.flags = 0;
1461 xcrs.xcrs[0].xcr = 0;
1462 xcrs.xcrs[0].value = env->xcr0;
1463 return kvm_vcpu_ioctl(CPU(cpu), KVM_SET_XCRS, &xcrs);
1464 }
1465
1466 static int kvm_put_sregs(X86CPU *cpu)
1467 {
1468 CPUX86State *env = &cpu->env;
1469 struct kvm_sregs sregs;
1470
1471 memset(sregs.interrupt_bitmap, 0, sizeof(sregs.interrupt_bitmap));
1472 if (env->interrupt_injected >= 0) {
1473 sregs.interrupt_bitmap[env->interrupt_injected / 64] |=
1474 (uint64_t)1 << (env->interrupt_injected % 64);
1475 }
1476
1477 if ((env->eflags & VM_MASK)) {
1478 set_v8086_seg(&sregs.cs, &env->segs[R_CS]);
1479 set_v8086_seg(&sregs.ds, &env->segs[R_DS]);
1480 set_v8086_seg(&sregs.es, &env->segs[R_ES]);
1481 set_v8086_seg(&sregs.fs, &env->segs[R_FS]);
1482 set_v8086_seg(&sregs.gs, &env->segs[R_GS]);
1483 set_v8086_seg(&sregs.ss, &env->segs[R_SS]);
1484 } else {
1485 set_seg(&sregs.cs, &env->segs[R_CS]);
1486 set_seg(&sregs.ds, &env->segs[R_DS]);
1487 set_seg(&sregs.es, &env->segs[R_ES]);
1488 set_seg(&sregs.fs, &env->segs[R_FS]);
1489 set_seg(&sregs.gs, &env->segs[R_GS]);
1490 set_seg(&sregs.ss, &env->segs[R_SS]);
1491 }
1492
1493 set_seg(&sregs.tr, &env->tr);
1494 set_seg(&sregs.ldt, &env->ldt);
1495
1496 sregs.idt.limit = env->idt.limit;
1497 sregs.idt.base = env->idt.base;
1498 memset(sregs.idt.padding, 0, sizeof sregs.idt.padding);
1499 sregs.gdt.limit = env->gdt.limit;
1500 sregs.gdt.base = env->gdt.base;
1501 memset(sregs.gdt.padding, 0, sizeof sregs.gdt.padding);
1502
1503 sregs.cr0 = env->cr[0];
1504 sregs.cr2 = env->cr[2];
1505 sregs.cr3 = env->cr[3];
1506 sregs.cr4 = env->cr[4];
1507
1508 sregs.cr8 = cpu_get_apic_tpr(cpu->apic_state);
1509 sregs.apic_base = cpu_get_apic_base(cpu->apic_state);
1510
1511 sregs.efer = env->efer;
1512
1513 return kvm_vcpu_ioctl(CPU(cpu), KVM_SET_SREGS, &sregs);
1514 }
1515
1516 static void kvm_msr_buf_reset(X86CPU *cpu)
1517 {
1518 memset(cpu->kvm_msr_buf, 0, MSR_BUF_SIZE);
1519 }
1520
1521 static void kvm_msr_entry_add(X86CPU *cpu, uint32_t index, uint64_t value)
1522 {
1523 struct kvm_msrs *msrs = cpu->kvm_msr_buf;
1524 void *limit = ((void *)msrs) + MSR_BUF_SIZE;
1525 struct kvm_msr_entry *entry = &msrs->entries[msrs->nmsrs];
1526
1527 assert((void *)(entry + 1) <= limit);
1528
1529 entry->index = index;
1530 entry->reserved = 0;
1531 entry->data = value;
1532 msrs->nmsrs++;
1533 }
1534
1535 static int kvm_put_tscdeadline_msr(X86CPU *cpu)
1536 {
1537 CPUX86State *env = &cpu->env;
1538 int ret;
1539
1540 if (!has_msr_tsc_deadline) {
1541 return 0;
1542 }
1543
1544 kvm_msr_buf_reset(cpu);
1545 kvm_msr_entry_add(cpu, MSR_IA32_TSCDEADLINE, env->tsc_deadline);
1546
1547 ret = kvm_vcpu_ioctl(CPU(cpu), KVM_SET_MSRS, cpu->kvm_msr_buf);
1548 if (ret < 0) {
1549 return ret;
1550 }
1551
1552 assert(ret == 1);
1553 return 0;
1554 }
1555
1556 /*
1557 * Provide a separate write service for the feature control MSR in order to
1558 * kick the VCPU out of VMXON or even guest mode on reset. This has to be done
1559 * before writing any other state because forcibly leaving nested mode
1560 * invalidates the VCPU state.
1561 */
1562 static int kvm_put_msr_feature_control(X86CPU *cpu)
1563 {
1564 int ret;
1565
1566 if (!has_msr_feature_control) {
1567 return 0;
1568 }
1569
1570 kvm_msr_buf_reset(cpu);
1571 kvm_msr_entry_add(cpu, MSR_IA32_FEATURE_CONTROL,
1572 cpu->env.msr_ia32_feature_control);
1573
1574 ret = kvm_vcpu_ioctl(CPU(cpu), KVM_SET_MSRS, cpu->kvm_msr_buf);
1575 if (ret < 0) {
1576 return ret;
1577 }
1578
1579 assert(ret == 1);
1580 return 0;
1581 }
1582
1583 static int kvm_put_msrs(X86CPU *cpu, int level)
1584 {
1585 CPUX86State *env = &cpu->env;
1586 int i;
1587 int ret;
1588
1589 kvm_msr_buf_reset(cpu);
1590
1591 kvm_msr_entry_add(cpu, MSR_IA32_SYSENTER_CS, env->sysenter_cs);
1592 kvm_msr_entry_add(cpu, MSR_IA32_SYSENTER_ESP, env->sysenter_esp);
1593 kvm_msr_entry_add(cpu, MSR_IA32_SYSENTER_EIP, env->sysenter_eip);
1594 kvm_msr_entry_add(cpu, MSR_PAT, env->pat);
1595 if (has_msr_star) {
1596 kvm_msr_entry_add(cpu, MSR_STAR, env->star);
1597 }
1598 if (has_msr_hsave_pa) {
1599 kvm_msr_entry_add(cpu, MSR_VM_HSAVE_PA, env->vm_hsave);
1600 }
1601 if (has_msr_tsc_aux) {
1602 kvm_msr_entry_add(cpu, MSR_TSC_AUX, env->tsc_aux);
1603 }
1604 if (has_msr_tsc_adjust) {
1605 kvm_msr_entry_add(cpu, MSR_TSC_ADJUST, env->tsc_adjust);
1606 }
1607 if (has_msr_misc_enable) {
1608 kvm_msr_entry_add(cpu, MSR_IA32_MISC_ENABLE,
1609 env->msr_ia32_misc_enable);
1610 }
1611 if (has_msr_smbase) {
1612 kvm_msr_entry_add(cpu, MSR_IA32_SMBASE, env->smbase);
1613 }
1614 if (has_msr_bndcfgs) {
1615 kvm_msr_entry_add(cpu, MSR_IA32_BNDCFGS, env->msr_bndcfgs);
1616 }
1617 if (has_msr_xss) {
1618 kvm_msr_entry_add(cpu, MSR_IA32_XSS, env->xss);
1619 }
1620 #ifdef TARGET_X86_64
1621 if (lm_capable_kernel) {
1622 kvm_msr_entry_add(cpu, MSR_CSTAR, env->cstar);
1623 kvm_msr_entry_add(cpu, MSR_KERNELGSBASE, env->kernelgsbase);
1624 kvm_msr_entry_add(cpu, MSR_FMASK, env->fmask);
1625 kvm_msr_entry_add(cpu, MSR_LSTAR, env->lstar);
1626 }
1627 #endif
1628 /*
1629 * The following MSRs have side effects on the guest or are too heavy
1630 * for normal writeback. Limit them to reset or full state updates.
1631 */
1632 if (level >= KVM_PUT_RESET_STATE) {
1633 kvm_msr_entry_add(cpu, MSR_IA32_TSC, env->tsc);
1634 kvm_msr_entry_add(cpu, MSR_KVM_SYSTEM_TIME, env->system_time_msr);
1635 kvm_msr_entry_add(cpu, MSR_KVM_WALL_CLOCK, env->wall_clock_msr);
1636 if (has_msr_async_pf_en) {
1637 kvm_msr_entry_add(cpu, MSR_KVM_ASYNC_PF_EN, env->async_pf_en_msr);
1638 }
1639 if (has_msr_pv_eoi_en) {
1640 kvm_msr_entry_add(cpu, MSR_KVM_PV_EOI_EN, env->pv_eoi_en_msr);
1641 }
1642 if (has_msr_kvm_steal_time) {
1643 kvm_msr_entry_add(cpu, MSR_KVM_STEAL_TIME, env->steal_time_msr);
1644 }
1645 if (has_msr_architectural_pmu) {
1646 /* Stop the counter. */
1647 kvm_msr_entry_add(cpu, MSR_CORE_PERF_FIXED_CTR_CTRL, 0);
1648 kvm_msr_entry_add(cpu, MSR_CORE_PERF_GLOBAL_CTRL, 0);
1649
1650 /* Set the counter values. */
1651 for (i = 0; i < MAX_FIXED_COUNTERS; i++) {
1652 kvm_msr_entry_add(cpu, MSR_CORE_PERF_FIXED_CTR0 + i,
1653 env->msr_fixed_counters[i]);
1654 }
1655 for (i = 0; i < num_architectural_pmu_counters; i++) {
1656 kvm_msr_entry_add(cpu, MSR_P6_PERFCTR0 + i,
1657 env->msr_gp_counters[i]);
1658 kvm_msr_entry_add(cpu, MSR_P6_EVNTSEL0 + i,
1659 env->msr_gp_evtsel[i]);
1660 }
1661 kvm_msr_entry_add(cpu, MSR_CORE_PERF_GLOBAL_STATUS,
1662 env->msr_global_status);
1663 kvm_msr_entry_add(cpu, MSR_CORE_PERF_GLOBAL_OVF_CTRL,
1664 env->msr_global_ovf_ctrl);
1665
1666 /* Now start the PMU. */
1667 kvm_msr_entry_add(cpu, MSR_CORE_PERF_FIXED_CTR_CTRL,
1668 env->msr_fixed_ctr_ctrl);
1669 kvm_msr_entry_add(cpu, MSR_CORE_PERF_GLOBAL_CTRL,
1670 env->msr_global_ctrl);
1671 }
1672 if (has_msr_hv_hypercall) {
1673 kvm_msr_entry_add(cpu, HV_X64_MSR_GUEST_OS_ID,
1674 env->msr_hv_guest_os_id);
1675 kvm_msr_entry_add(cpu, HV_X64_MSR_HYPERCALL,
1676 env->msr_hv_hypercall);
1677 }
1678 if (has_msr_hv_vapic) {
1679 kvm_msr_entry_add(cpu, HV_X64_MSR_APIC_ASSIST_PAGE,
1680 env->msr_hv_vapic);
1681 }
1682 if (has_msr_hv_tsc) {
1683 kvm_msr_entry_add(cpu, HV_X64_MSR_REFERENCE_TSC, env->msr_hv_tsc);
1684 }
1685 if (has_msr_hv_crash) {
1686 int j;
1687
1688 for (j = 0; j < HV_X64_MSR_CRASH_PARAMS; j++)
1689 kvm_msr_entry_add(cpu, HV_X64_MSR_CRASH_P0 + j,
1690 env->msr_hv_crash_params[j]);
1691
1692 kvm_msr_entry_add(cpu, HV_X64_MSR_CRASH_CTL,
1693 HV_X64_MSR_CRASH_CTL_NOTIFY);
1694 }
1695 if (has_msr_hv_runtime) {
1696 kvm_msr_entry_add(cpu, HV_X64_MSR_VP_RUNTIME, env->msr_hv_runtime);
1697 }
1698 if (cpu->hyperv_synic) {
1699 int j;
1700
1701 kvm_msr_entry_add(cpu, HV_X64_MSR_SCONTROL,
1702 env->msr_hv_synic_control);
1703 kvm_msr_entry_add(cpu, HV_X64_MSR_SVERSION,
1704 env->msr_hv_synic_version);
1705 kvm_msr_entry_add(cpu, HV_X64_MSR_SIEFP,
1706 env->msr_hv_synic_evt_page);
1707 kvm_msr_entry_add(cpu, HV_X64_MSR_SIMP,
1708 env->msr_hv_synic_msg_page);
1709
1710 for (j = 0; j < ARRAY_SIZE(env->msr_hv_synic_sint); j++) {
1711 kvm_msr_entry_add(cpu, HV_X64_MSR_SINT0 + j,
1712 env->msr_hv_synic_sint[j]);
1713 }
1714 }
1715 if (has_msr_hv_stimer) {
1716 int j;
1717
1718 for (j = 0; j < ARRAY_SIZE(env->msr_hv_stimer_config); j++) {
1719 kvm_msr_entry_add(cpu, HV_X64_MSR_STIMER0_CONFIG + j * 2,
1720 env->msr_hv_stimer_config[j]);
1721 }
1722
1723 for (j = 0; j < ARRAY_SIZE(env->msr_hv_stimer_count); j++) {
1724 kvm_msr_entry_add(cpu, HV_X64_MSR_STIMER0_COUNT + j * 2,
1725 env->msr_hv_stimer_count[j]);
1726 }
1727 }
1728 if (has_msr_mtrr) {
1729 uint64_t phys_mask = MAKE_64BIT_MASK(0, cpu->phys_bits);
1730
1731 kvm_msr_entry_add(cpu, MSR_MTRRdefType, env->mtrr_deftype);
1732 kvm_msr_entry_add(cpu, MSR_MTRRfix64K_00000, env->mtrr_fixed[0]);
1733 kvm_msr_entry_add(cpu, MSR_MTRRfix16K_80000, env->mtrr_fixed[1]);
1734 kvm_msr_entry_add(cpu, MSR_MTRRfix16K_A0000, env->mtrr_fixed[2]);
1735 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_C0000, env->mtrr_fixed[3]);
1736 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_C8000, env->mtrr_fixed[4]);
1737 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_D0000, env->mtrr_fixed[5]);
1738 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_D8000, env->mtrr_fixed[6]);
1739 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_E0000, env->mtrr_fixed[7]);
1740 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_E8000, env->mtrr_fixed[8]);
1741 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_F0000, env->mtrr_fixed[9]);
1742 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_F8000, env->mtrr_fixed[10]);
1743 for (i = 0; i < MSR_MTRRcap_VCNT; i++) {
1744 /* The CPU GPs if we write to a bit above the physical limit of
1745 * the host CPU (and KVM emulates that)
1746 */
1747 uint64_t mask = env->mtrr_var[i].mask;
1748 mask &= phys_mask;
1749
1750 kvm_msr_entry_add(cpu, MSR_MTRRphysBase(i),
1751 env->mtrr_var[i].base);
1752 kvm_msr_entry_add(cpu, MSR_MTRRphysMask(i), mask);
1753 }
1754 }
1755
1756 /* Note: MSR_IA32_FEATURE_CONTROL is written separately, see
1757 * kvm_put_msr_feature_control. */
1758 }
1759 if (env->mcg_cap) {
1760 int i;
1761
1762 kvm_msr_entry_add(cpu, MSR_MCG_STATUS, env->mcg_status);
1763 kvm_msr_entry_add(cpu, MSR_MCG_CTL, env->mcg_ctl);
1764 if (has_msr_mcg_ext_ctl) {
1765 kvm_msr_entry_add(cpu, MSR_MCG_EXT_CTL, env->mcg_ext_ctl);
1766 }
1767 for (i = 0; i < (env->mcg_cap & 0xff) * 4; i++) {
1768 kvm_msr_entry_add(cpu, MSR_MC0_CTL + i, env->mce_banks[i]);
1769 }
1770 }
1771
1772 ret = kvm_vcpu_ioctl(CPU(cpu), KVM_SET_MSRS, cpu->kvm_msr_buf);
1773 if (ret < 0) {
1774 return ret;
1775 }
1776
1777 assert(ret == cpu->kvm_msr_buf->nmsrs);
1778 return 0;
1779 }
1780
1781
1782 static int kvm_get_fpu(X86CPU *cpu)
1783 {
1784 CPUX86State *env = &cpu->env;
1785 struct kvm_fpu fpu;
1786 int i, ret;
1787
1788 ret = kvm_vcpu_ioctl(CPU(cpu), KVM_GET_FPU, &fpu);
1789 if (ret < 0) {
1790 return ret;
1791 }
1792
1793 env->fpstt = (fpu.fsw >> 11) & 7;
1794 env->fpus = fpu.fsw;
1795 env->fpuc = fpu.fcw;
1796 env->fpop = fpu.last_opcode;
1797 env->fpip = fpu.last_ip;
1798 env->fpdp = fpu.last_dp;
1799 for (i = 0; i < 8; ++i) {
1800 env->fptags[i] = !((fpu.ftwx >> i) & 1);
1801 }
1802 memcpy(env->fpregs, fpu.fpr, sizeof env->fpregs);
1803 for (i = 0; i < CPU_NB_REGS; i++) {
1804 env->xmm_regs[i].ZMM_Q(0) = ldq_p(&fpu.xmm[i][0]);
1805 env->xmm_regs[i].ZMM_Q(1) = ldq_p(&fpu.xmm[i][8]);
1806 }
1807 env->mxcsr = fpu.mxcsr;
1808
1809 return 0;
1810 }
1811
1812 static int kvm_get_xsave(X86CPU *cpu)
1813 {
1814 CPUX86State *env = &cpu->env;
1815 X86XSaveArea *xsave = env->kvm_xsave_buf;
1816 int ret, i;
1817 uint16_t cwd, swd, twd;
1818
1819 if (!has_xsave) {
1820 return kvm_get_fpu(cpu);
1821 }
1822
1823 ret = kvm_vcpu_ioctl(CPU(cpu), KVM_GET_XSAVE, xsave);
1824 if (ret < 0) {
1825 return ret;
1826 }
1827
1828 cwd = xsave->legacy.fcw;
1829 swd = xsave->legacy.fsw;
1830 twd = xsave->legacy.ftw;
1831 env->fpop = xsave->legacy.fpop;
1832 env->fpstt = (swd >> 11) & 7;
1833 env->fpus = swd;
1834 env->fpuc = cwd;
1835 for (i = 0; i < 8; ++i) {
1836 env->fptags[i] = !((twd >> i) & 1);
1837 }
1838 env->fpip = xsave->legacy.fpip;
1839 env->fpdp = xsave->legacy.fpdp;
1840 env->mxcsr = xsave->legacy.mxcsr;
1841 memcpy(env->fpregs, &xsave->legacy.fpregs,
1842 sizeof env->fpregs);
1843 env->xstate_bv = xsave->header.xstate_bv;
1844 memcpy(env->bnd_regs, &xsave->bndreg_state.bnd_regs,
1845 sizeof env->bnd_regs);
1846 env->bndcs_regs = xsave->bndcsr_state.bndcsr;
1847 memcpy(env->opmask_regs, &xsave->opmask_state.opmask_regs,
1848 sizeof env->opmask_regs);
1849
1850 for (i = 0; i < CPU_NB_REGS; i++) {
1851 uint8_t *xmm = xsave->legacy.xmm_regs[i];
1852 uint8_t *ymmh = xsave->avx_state.ymmh[i];
1853 uint8_t *zmmh = xsave->zmm_hi256_state.zmm_hi256[i];
1854 env->xmm_regs[i].ZMM_Q(0) = ldq_p(xmm);
1855 env->xmm_regs[i].ZMM_Q(1) = ldq_p(xmm+8);
1856 env->xmm_regs[i].ZMM_Q(2) = ldq_p(ymmh);
1857 env->xmm_regs[i].ZMM_Q(3) = ldq_p(ymmh+8);
1858 env->xmm_regs[i].ZMM_Q(4) = ldq_p(zmmh);
1859 env->xmm_regs[i].ZMM_Q(5) = ldq_p(zmmh+8);
1860 env->xmm_regs[i].ZMM_Q(6) = ldq_p(zmmh+16);
1861 env->xmm_regs[i].ZMM_Q(7) = ldq_p(zmmh+24);
1862 }
1863
1864 #ifdef TARGET_X86_64
1865 memcpy(&env->xmm_regs[16], &xsave->hi16_zmm_state.hi16_zmm,
1866 16 * sizeof env->xmm_regs[16]);
1867 memcpy(&env->pkru, &xsave->pkru_state, sizeof env->pkru);
1868 #endif
1869 return 0;
1870 }
1871
1872 static int kvm_get_xcrs(X86CPU *cpu)
1873 {
1874 CPUX86State *env = &cpu->env;
1875 int i, ret;
1876 struct kvm_xcrs xcrs;
1877
1878 if (!has_xcrs) {
1879 return 0;
1880 }
1881
1882 ret = kvm_vcpu_ioctl(CPU(cpu), KVM_GET_XCRS, &xcrs);
1883 if (ret < 0) {
1884 return ret;
1885 }
1886
1887 for (i = 0; i < xcrs.nr_xcrs; i++) {
1888 /* Only support xcr0 now */
1889 if (xcrs.xcrs[i].xcr == 0) {
1890 env->xcr0 = xcrs.xcrs[i].value;
1891 break;
1892 }
1893 }
1894 return 0;
1895 }
1896
1897 static int kvm_get_sregs(X86CPU *cpu)
1898 {
1899 CPUX86State *env = &cpu->env;
1900 struct kvm_sregs sregs;
1901 uint32_t hflags;
1902 int bit, i, ret;
1903
1904 ret = kvm_vcpu_ioctl(CPU(cpu), KVM_GET_SREGS, &sregs);
1905 if (ret < 0) {
1906 return ret;
1907 }
1908
1909 /* There can only be one pending IRQ set in the bitmap at a time, so try
1910 to find it and save its number instead (-1 for none). */
1911 env->interrupt_injected = -1;
1912 for (i = 0; i < ARRAY_SIZE(sregs.interrupt_bitmap); i++) {
1913 if (sregs.interrupt_bitmap[i]) {
1914 bit = ctz64(sregs.interrupt_bitmap[i]);
1915 env->interrupt_injected = i * 64 + bit;
1916 break;
1917 }
1918 }
1919
1920 get_seg(&env->segs[R_CS], &sregs.cs);
1921 get_seg(&env->segs[R_DS], &sregs.ds);
1922 get_seg(&env->segs[R_ES], &sregs.es);
1923 get_seg(&env->segs[R_FS], &sregs.fs);
1924 get_seg(&env->segs[R_GS], &sregs.gs);
1925 get_seg(&env->segs[R_SS], &sregs.ss);
1926
1927 get_seg(&env->tr, &sregs.tr);
1928 get_seg(&env->ldt, &sregs.ldt);
1929
1930 env->idt.limit = sregs.idt.limit;
1931 env->idt.base = sregs.idt.base;
1932 env->gdt.limit = sregs.gdt.limit;
1933 env->gdt.base = sregs.gdt.base;
1934
1935 env->cr[0] = sregs.cr0;
1936 env->cr[2] = sregs.cr2;
1937 env->cr[3] = sregs.cr3;
1938 env->cr[4] = sregs.cr4;
1939
1940 env->efer = sregs.efer;
1941
1942 /* changes to apic base and cr8/tpr are read back via kvm_arch_post_run */
1943
1944 #define HFLAG_COPY_MASK \
1945 ~( HF_CPL_MASK | HF_PE_MASK | HF_MP_MASK | HF_EM_MASK | \
1946 HF_TS_MASK | HF_TF_MASK | HF_VM_MASK | HF_IOPL_MASK | \
1947 HF_OSFXSR_MASK | HF_LMA_MASK | HF_CS32_MASK | \
1948 HF_SS32_MASK | HF_CS64_MASK | HF_ADDSEG_MASK)
1949
1950 hflags = env->hflags & HFLAG_COPY_MASK;
1951 hflags |= (env->segs[R_SS].flags >> DESC_DPL_SHIFT) & HF_CPL_MASK;
1952 hflags |= (env->cr[0] & CR0_PE_MASK) << (HF_PE_SHIFT - CR0_PE_SHIFT);
1953 hflags |= (env->cr[0] << (HF_MP_SHIFT - CR0_MP_SHIFT)) &
1954 (HF_MP_MASK | HF_EM_MASK | HF_TS_MASK);
1955 hflags |= (env->eflags & (HF_TF_MASK | HF_VM_MASK | HF_IOPL_MASK));
1956
1957 if (env->cr[4] & CR4_OSFXSR_MASK) {
1958 hflags |= HF_OSFXSR_MASK;
1959 }
1960
1961 if (env->efer & MSR_EFER_LMA) {
1962 hflags |= HF_LMA_MASK;
1963 }
1964
1965 if ((hflags & HF_LMA_MASK) && (env->segs[R_CS].flags & DESC_L_MASK)) {
1966 hflags |= HF_CS32_MASK | HF_SS32_MASK | HF_CS64_MASK;
1967 } else {
1968 hflags |= (env->segs[R_CS].flags & DESC_B_MASK) >>
1969 (DESC_B_SHIFT - HF_CS32_SHIFT);
1970 hflags |= (env->segs[R_SS].flags & DESC_B_MASK) >>
1971 (DESC_B_SHIFT - HF_SS32_SHIFT);
1972 if (!(env->cr[0] & CR0_PE_MASK) || (env->eflags & VM_MASK) ||
1973 !(hflags & HF_CS32_MASK)) {
1974 hflags |= HF_ADDSEG_MASK;
1975 } else {
1976 hflags |= ((env->segs[R_DS].base | env->segs[R_ES].base |
1977 env->segs[R_SS].base) != 0) << HF_ADDSEG_SHIFT;
1978 }
1979 }
1980 env->hflags = hflags;
1981
1982 return 0;
1983 }
1984
1985 static int kvm_get_msrs(X86CPU *cpu)
1986 {
1987 CPUX86State *env = &cpu->env;
1988 struct kvm_msr_entry *msrs = cpu->kvm_msr_buf->entries;
1989 int ret, i;
1990 uint64_t mtrr_top_bits;
1991
1992 kvm_msr_buf_reset(cpu);
1993
1994 kvm_msr_entry_add(cpu, MSR_IA32_SYSENTER_CS, 0);
1995 kvm_msr_entry_add(cpu, MSR_IA32_SYSENTER_ESP, 0);
1996 kvm_msr_entry_add(cpu, MSR_IA32_SYSENTER_EIP, 0);
1997 kvm_msr_entry_add(cpu, MSR_PAT, 0);
1998 if (has_msr_star) {
1999 kvm_msr_entry_add(cpu, MSR_STAR, 0);
2000 }
2001 if (has_msr_hsave_pa) {
2002 kvm_msr_entry_add(cpu, MSR_VM_HSAVE_PA, 0);
2003 }
2004 if (has_msr_tsc_aux) {
2005 kvm_msr_entry_add(cpu, MSR_TSC_AUX, 0);
2006 }
2007 if (has_msr_tsc_adjust) {
2008 kvm_msr_entry_add(cpu, MSR_TSC_ADJUST, 0);
2009 }
2010 if (has_msr_tsc_deadline) {
2011 kvm_msr_entry_add(cpu, MSR_IA32_TSCDEADLINE, 0);
2012 }
2013 if (has_msr_misc_enable) {
2014 kvm_msr_entry_add(cpu, MSR_IA32_MISC_ENABLE, 0);
2015 }
2016 if (has_msr_smbase) {
2017 kvm_msr_entry_add(cpu, MSR_IA32_SMBASE, 0);
2018 }
2019 if (has_msr_feature_control) {
2020 kvm_msr_entry_add(cpu, MSR_IA32_FEATURE_CONTROL, 0);
2021 }
2022 if (has_msr_bndcfgs) {
2023 kvm_msr_entry_add(cpu, MSR_IA32_BNDCFGS, 0);
2024 }
2025 if (has_msr_xss) {
2026 kvm_msr_entry_add(cpu, MSR_IA32_XSS, 0);
2027 }
2028
2029
2030 if (!env->tsc_valid) {
2031 kvm_msr_entry_add(cpu, MSR_IA32_TSC, 0);
2032 env->tsc_valid = !runstate_is_running();
2033 }
2034
2035 #ifdef TARGET_X86_64
2036 if (lm_capable_kernel) {
2037 kvm_msr_entry_add(cpu, MSR_CSTAR, 0);
2038 kvm_msr_entry_add(cpu, MSR_KERNELGSBASE, 0);
2039 kvm_msr_entry_add(cpu, MSR_FMASK, 0);
2040 kvm_msr_entry_add(cpu, MSR_LSTAR, 0);
2041 }
2042 #endif
2043 kvm_msr_entry_add(cpu, MSR_KVM_SYSTEM_TIME, 0);
2044 kvm_msr_entry_add(cpu, MSR_KVM_WALL_CLOCK, 0);
2045 if (has_msr_async_pf_en) {
2046 kvm_msr_entry_add(cpu, MSR_KVM_ASYNC_PF_EN, 0);
2047 }
2048 if (has_msr_pv_eoi_en) {
2049 kvm_msr_entry_add(cpu, MSR_KVM_PV_EOI_EN, 0);
2050 }
2051 if (has_msr_kvm_steal_time) {
2052 kvm_msr_entry_add(cpu, MSR_KVM_STEAL_TIME, 0);
2053 }
2054 if (has_msr_architectural_pmu) {
2055 kvm_msr_entry_add(cpu, MSR_CORE_PERF_FIXED_CTR_CTRL, 0);
2056 kvm_msr_entry_add(cpu, MSR_CORE_PERF_GLOBAL_CTRL, 0);
2057 kvm_msr_entry_add(cpu, MSR_CORE_PERF_GLOBAL_STATUS, 0);
2058 kvm_msr_entry_add(cpu, MSR_CORE_PERF_GLOBAL_OVF_CTRL, 0);
2059 for (i = 0; i < MAX_FIXED_COUNTERS; i++) {
2060 kvm_msr_entry_add(cpu, MSR_CORE_PERF_FIXED_CTR0 + i, 0);
2061 }
2062 for (i = 0; i < num_architectural_pmu_counters; i++) {
2063 kvm_msr_entry_add(cpu, MSR_P6_PERFCTR0 + i, 0);
2064 kvm_msr_entry_add(cpu, MSR_P6_EVNTSEL0 + i, 0);
2065 }
2066 }
2067
2068 if (env->mcg_cap) {
2069 kvm_msr_entry_add(cpu, MSR_MCG_STATUS, 0);
2070 kvm_msr_entry_add(cpu, MSR_MCG_CTL, 0);
2071 if (has_msr_mcg_ext_ctl) {
2072 kvm_msr_entry_add(cpu, MSR_MCG_EXT_CTL, 0);
2073 }
2074 for (i = 0; i < (env->mcg_cap & 0xff) * 4; i++) {
2075 kvm_msr_entry_add(cpu, MSR_MC0_CTL + i, 0);
2076 }
2077 }
2078
2079 if (has_msr_hv_hypercall) {
2080 kvm_msr_entry_add(cpu, HV_X64_MSR_HYPERCALL, 0);
2081 kvm_msr_entry_add(cpu, HV_X64_MSR_GUEST_OS_ID, 0);
2082 }
2083 if (has_msr_hv_vapic) {
2084 kvm_msr_entry_add(cpu, HV_X64_MSR_APIC_ASSIST_PAGE, 0);
2085 }
2086 if (has_msr_hv_tsc) {
2087 kvm_msr_entry_add(cpu, HV_X64_MSR_REFERENCE_TSC, 0);
2088 }
2089 if (has_msr_hv_crash) {
2090 int j;
2091
2092 for (j = 0; j < HV_X64_MSR_CRASH_PARAMS; j++) {
2093 kvm_msr_entry_add(cpu, HV_X64_MSR_CRASH_P0 + j, 0);
2094 }
2095 }
2096 if (has_msr_hv_runtime) {
2097 kvm_msr_entry_add(cpu, HV_X64_MSR_VP_RUNTIME, 0);
2098 }
2099 if (cpu->hyperv_synic) {
2100 uint32_t msr;
2101
2102 kvm_msr_entry_add(cpu, HV_X64_MSR_SCONTROL, 0);
2103 kvm_msr_entry_add(cpu, HV_X64_MSR_SVERSION, 0);
2104 kvm_msr_entry_add(cpu, HV_X64_MSR_SIEFP, 0);
2105 kvm_msr_entry_add(cpu, HV_X64_MSR_SIMP, 0);
2106 for (msr = HV_X64_MSR_SINT0; msr <= HV_X64_MSR_SINT15; msr++) {
2107 kvm_msr_entry_add(cpu, msr, 0);
2108 }
2109 }
2110 if (has_msr_hv_stimer) {
2111 uint32_t msr;
2112
2113 for (msr = HV_X64_MSR_STIMER0_CONFIG; msr <= HV_X64_MSR_STIMER3_COUNT;
2114 msr++) {
2115 kvm_msr_entry_add(cpu, msr, 0);
2116 }
2117 }
2118 if (has_msr_mtrr) {
2119 kvm_msr_entry_add(cpu, MSR_MTRRdefType, 0);
2120 kvm_msr_entry_add(cpu, MSR_MTRRfix64K_00000, 0);
2121 kvm_msr_entry_add(cpu, MSR_MTRRfix16K_80000, 0);
2122 kvm_msr_entry_add(cpu, MSR_MTRRfix16K_A0000, 0);
2123 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_C0000, 0);
2124 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_C8000, 0);
2125 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_D0000, 0);
2126 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_D8000, 0);
2127 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_E0000, 0);
2128 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_E8000, 0);
2129 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_F0000, 0);
2130 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_F8000, 0);
2131 for (i = 0; i < MSR_MTRRcap_VCNT; i++) {
2132 kvm_msr_entry_add(cpu, MSR_MTRRphysBase(i), 0);
2133 kvm_msr_entry_add(cpu, MSR_MTRRphysMask(i), 0);
2134 }
2135 }
2136
2137 ret = kvm_vcpu_ioctl(CPU(cpu), KVM_GET_MSRS, cpu->kvm_msr_buf);
2138 if (ret < 0) {
2139 return ret;
2140 }
2141
2142 assert(ret == cpu->kvm_msr_buf->nmsrs);
2143 /*
2144 * MTRR masks: Each mask consists of 5 parts
2145 * a 10..0: must be zero
2146 * b 11 : valid bit
2147 * c n-1.12: actual mask bits
2148 * d 51..n: reserved must be zero
2149 * e 63.52: reserved must be zero
2150 *
2151 * 'n' is the number of physical bits supported by the CPU and is
2152 * apparently always <= 52. We know our 'n' but don't know what
2153 * the destinations 'n' is; it might be smaller, in which case
2154 * it masks (c) on loading. It might be larger, in which case
2155 * we fill 'd' so that d..c is consistent irrespetive of the 'n'
2156 * we're migrating to.
2157 */
2158
2159 if (cpu->fill_mtrr_mask) {
2160 QEMU_BUILD_BUG_ON(TARGET_PHYS_ADDR_SPACE_BITS > 52);
2161 assert(cpu->phys_bits <= TARGET_PHYS_ADDR_SPACE_BITS);
2162 mtrr_top_bits = MAKE_64BIT_MASK(cpu->phys_bits, 52 - cpu->phys_bits);
2163 } else {
2164 mtrr_top_bits = 0;
2165 }
2166
2167 for (i = 0; i < ret; i++) {
2168 uint32_t index = msrs[i].index;
2169 switch (index) {
2170 case MSR_IA32_SYSENTER_CS:
2171 env->sysenter_cs = msrs[i].data;
2172 break;
2173 case MSR_IA32_SYSENTER_ESP:
2174 env->sysenter_esp = msrs[i].data;
2175 break;
2176 case MSR_IA32_SYSENTER_EIP:
2177 env->sysenter_eip = msrs[i].data;
2178 break;
2179 case MSR_PAT:
2180 env->pat = msrs[i].data;
2181 break;
2182 case MSR_STAR:
2183 env->star = msrs[i].data;
2184 break;
2185 #ifdef TARGET_X86_64
2186 case MSR_CSTAR:
2187 env->cstar = msrs[i].data;
2188 break;
2189 case MSR_KERNELGSBASE:
2190 env->kernelgsbase = msrs[i].data;
2191 break;
2192 case MSR_FMASK:
2193 env->fmask = msrs[i].data;
2194 break;
2195 case MSR_LSTAR:
2196 env->lstar = msrs[i].data;
2197 break;
2198 #endif
2199 case MSR_IA32_TSC:
2200 env->tsc = msrs[i].data;
2201 break;
2202 case MSR_TSC_AUX:
2203 env->tsc_aux = msrs[i].data;
2204 break;
2205 case MSR_TSC_ADJUST:
2206 env->tsc_adjust = msrs[i].data;
2207 break;
2208 case MSR_IA32_TSCDEADLINE:
2209 env->tsc_deadline = msrs[i].data;
2210 break;
2211 case MSR_VM_HSAVE_PA:
2212 env->vm_hsave = msrs[i].data;
2213 break;
2214 case MSR_KVM_SYSTEM_TIME:
2215 env->system_time_msr = msrs[i].data;
2216 break;
2217 case MSR_KVM_WALL_CLOCK:
2218 env->wall_clock_msr = msrs[i].data;
2219 break;
2220 case MSR_MCG_STATUS:
2221 env->mcg_status = msrs[i].data;
2222 break;
2223 case MSR_MCG_CTL:
2224 env->mcg_ctl = msrs[i].data;
2225 break;
2226 case MSR_MCG_EXT_CTL:
2227 env->mcg_ext_ctl = msrs[i].data;
2228 break;
2229 case MSR_IA32_MISC_ENABLE:
2230 env->msr_ia32_misc_enable = msrs[i].data;
2231 break;
2232 case MSR_IA32_SMBASE:
2233 env->smbase = msrs[i].data;
2234 break;
2235 case MSR_IA32_FEATURE_CONTROL:
2236 env->msr_ia32_feature_control = msrs[i].data;
2237 break;
2238 case MSR_IA32_BNDCFGS:
2239 env->msr_bndcfgs = msrs[i].data;
2240 break;
2241 case MSR_IA32_XSS:
2242 env->xss = msrs[i].data;
2243 break;
2244 default:
2245 if (msrs[i].index >= MSR_MC0_CTL &&
2246 msrs[i].index < MSR_MC0_CTL + (env->mcg_cap & 0xff) * 4) {
2247 env->mce_banks[msrs[i].index - MSR_MC0_CTL] = msrs[i].data;
2248 }
2249 break;
2250 case MSR_KVM_ASYNC_PF_EN:
2251 env->async_pf_en_msr = msrs[i].data;
2252 break;
2253 case MSR_KVM_PV_EOI_EN:
2254 env->pv_eoi_en_msr = msrs[i].data;
2255 break;
2256 case MSR_KVM_STEAL_TIME:
2257 env->steal_time_msr = msrs[i].data;
2258 break;
2259 case MSR_CORE_PERF_FIXED_CTR_CTRL:
2260 env->msr_fixed_ctr_ctrl = msrs[i].data;
2261 break;
2262 case MSR_CORE_PERF_GLOBAL_CTRL:
2263 env->msr_global_ctrl = msrs[i].data;
2264 break;
2265 case MSR_CORE_PERF_GLOBAL_STATUS:
2266 env->msr_global_status = msrs[i].data;
2267 break;
2268 case MSR_CORE_PERF_GLOBAL_OVF_CTRL:
2269 env->msr_global_ovf_ctrl = msrs[i].data;
2270 break;
2271 case MSR_CORE_PERF_FIXED_CTR0 ... MSR_CORE_PERF_FIXED_CTR0 + MAX_FIXED_COUNTERS - 1:
2272 env->msr_fixed_counters[index - MSR_CORE_PERF_FIXED_CTR0] = msrs[i].data;
2273 break;
2274 case MSR_P6_PERFCTR0 ... MSR_P6_PERFCTR0 + MAX_GP_COUNTERS - 1:
2275 env->msr_gp_counters[index - MSR_P6_PERFCTR0] = msrs[i].data;
2276 break;
2277 case MSR_P6_EVNTSEL0 ... MSR_P6_EVNTSEL0 + MAX_GP_COUNTERS - 1:
2278 env->msr_gp_evtsel[index - MSR_P6_EVNTSEL0] = msrs[i].data;
2279 break;
2280 case HV_X64_MSR_HYPERCALL:
2281 env->msr_hv_hypercall = msrs[i].data;
2282 break;
2283 case HV_X64_MSR_GUEST_OS_ID:
2284 env->msr_hv_guest_os_id = msrs[i].data;
2285 break;
2286 case HV_X64_MSR_APIC_ASSIST_PAGE:
2287 env->msr_hv_vapic = msrs[i].data;
2288 break;
2289 case HV_X64_MSR_REFERENCE_TSC:
2290 env->msr_hv_tsc = msrs[i].data;
2291 break;
2292 case HV_X64_MSR_CRASH_P0 ... HV_X64_MSR_CRASH_P4:
2293 env->msr_hv_crash_params[index - HV_X64_MSR_CRASH_P0] = msrs[i].data;
2294 break;
2295 case HV_X64_MSR_VP_RUNTIME:
2296 env->msr_hv_runtime = msrs[i].data;
2297 break;
2298 case HV_X64_MSR_SCONTROL:
2299 env->msr_hv_synic_control = msrs[i].data;
2300 break;
2301 case HV_X64_MSR_SVERSION:
2302 env->msr_hv_synic_version = msrs[i].data;
2303 break;
2304 case HV_X64_MSR_SIEFP:
2305 env->msr_hv_synic_evt_page = msrs[i].data;
2306 break;
2307 case HV_X64_MSR_SIMP:
2308 env->msr_hv_synic_msg_page = msrs[i].data;
2309 break;
2310 case HV_X64_MSR_SINT0 ... HV_X64_MSR_SINT15:
2311 env->msr_hv_synic_sint[index - HV_X64_MSR_SINT0] = msrs[i].data;
2312 break;
2313 case HV_X64_MSR_STIMER0_CONFIG:
2314 case HV_X64_MSR_STIMER1_CONFIG:
2315 case HV_X64_MSR_STIMER2_CONFIG:
2316 case HV_X64_MSR_STIMER3_CONFIG:
2317 env->msr_hv_stimer_config[(index - HV_X64_MSR_STIMER0_CONFIG)/2] =
2318 msrs[i].data;
2319 break;
2320 case HV_X64_MSR_STIMER0_COUNT:
2321 case HV_X64_MSR_STIMER1_COUNT:
2322 case HV_X64_MSR_STIMER2_COUNT:
2323 case HV_X64_MSR_STIMER3_COUNT:
2324 env->msr_hv_stimer_count[(index - HV_X64_MSR_STIMER0_COUNT)/2] =
2325 msrs[i].data;
2326 break;
2327 case MSR_MTRRdefType:
2328 env->mtrr_deftype = msrs[i].data;
2329 break;
2330 case MSR_MTRRfix64K_00000:
2331 env->mtrr_fixed[0] = msrs[i].data;
2332 break;
2333 case MSR_MTRRfix16K_80000:
2334 env->mtrr_fixed[1] = msrs[i].data;
2335 break;
2336 case MSR_MTRRfix16K_A0000:
2337 env->mtrr_fixed[2] = msrs[i].data;
2338 break;
2339 case MSR_MTRRfix4K_C0000:
2340 env->mtrr_fixed[3] = msrs[i].data;
2341 break;
2342 case MSR_MTRRfix4K_C8000:
2343 env->mtrr_fixed[4] = msrs[i].data;
2344 break;
2345 case MSR_MTRRfix4K_D0000:
2346 env->mtrr_fixed[5] = msrs[i].data;
2347 break;
2348 case MSR_MTRRfix4K_D8000:
2349 env->mtrr_fixed[6] = msrs[i].data;
2350 break;
2351 case MSR_MTRRfix4K_E0000:
2352 env->mtrr_fixed[7] = msrs[i].data;
2353 break;
2354 case MSR_MTRRfix4K_E8000:
2355 env->mtrr_fixed[8] = msrs[i].data;
2356 break;
2357 case MSR_MTRRfix4K_F0000:
2358 env->mtrr_fixed[9] = msrs[i].data;
2359 break;
2360 case MSR_MTRRfix4K_F8000:
2361 env->mtrr_fixed[10] = msrs[i].data;
2362 break;
2363 case MSR_MTRRphysBase(0) ... MSR_MTRRphysMask(MSR_MTRRcap_VCNT - 1):
2364 if (index & 1) {
2365 env->mtrr_var[MSR_MTRRphysIndex(index)].mask = msrs[i].data |
2366 mtrr_top_bits;
2367 } else {
2368 env->mtrr_var[MSR_MTRRphysIndex(index)].base = msrs[i].data;
2369 }
2370 break;
2371 }
2372 }
2373
2374 return 0;
2375 }
2376
2377 static int kvm_put_mp_state(X86CPU *cpu)
2378 {
2379 struct kvm_mp_state mp_state = { .mp_state = cpu->env.mp_state };
2380
2381 return kvm_vcpu_ioctl(CPU(cpu), KVM_SET_MP_STATE, &mp_state);
2382 }
2383
2384 static int kvm_get_mp_state(X86CPU *cpu)
2385 {
2386 CPUState *cs = CPU(cpu);
2387 CPUX86State *env = &cpu->env;
2388 struct kvm_mp_state mp_state;
2389 int ret;
2390
2391 ret = kvm_vcpu_ioctl(cs, KVM_GET_MP_STATE, &mp_state);
2392 if (ret < 0) {
2393 return ret;
2394 }
2395 env->mp_state = mp_state.mp_state;
2396 if (kvm_irqchip_in_kernel()) {
2397 cs->halted = (mp_state.mp_state == KVM_MP_STATE_HALTED);
2398 }
2399 return 0;
2400 }
2401
2402 static int kvm_get_apic(X86CPU *cpu)
2403 {
2404 DeviceState *apic = cpu->apic_state;
2405 struct kvm_lapic_state kapic;
2406 int ret;
2407
2408 if (apic && kvm_irqchip_in_kernel()) {
2409 ret = kvm_vcpu_ioctl(CPU(cpu), KVM_GET_LAPIC, &kapic);
2410 if (ret < 0) {
2411 return ret;
2412 }
2413
2414 kvm_get_apic_state(apic, &kapic);
2415 }
2416 return 0;
2417 }
2418
2419 static int kvm_put_apic(X86CPU *cpu)
2420 {
2421 DeviceState *apic = cpu->apic_state;
2422 struct kvm_lapic_state kapic;
2423
2424 if (apic && kvm_irqchip_in_kernel()) {
2425 kvm_put_apic_state(apic, &kapic);
2426
2427 return kvm_vcpu_ioctl(CPU(cpu), KVM_SET_LAPIC, &kapic);
2428 }
2429 return 0;
2430 }
2431
2432 static int kvm_put_vcpu_events(X86CPU *cpu, int level)
2433 {
2434 CPUState *cs = CPU(cpu);
2435 CPUX86State *env = &cpu->env;
2436 struct kvm_vcpu_events events = {};
2437
2438 if (!kvm_has_vcpu_events()) {
2439 return 0;
2440 }
2441
2442 events.exception.injected = (env->exception_injected >= 0);
2443 events.exception.nr = env->exception_injected;
2444 events.exception.has_error_code = env->has_error_code;
2445 events.exception.error_code = env->error_code;
2446 events.exception.pad = 0;
2447
2448 events.interrupt.injected = (env->interrupt_injected >= 0);
2449 events.interrupt.nr = env->interrupt_injected;
2450 events.interrupt.soft = env->soft_interrupt;
2451
2452 events.nmi.injected = env->nmi_injected;
2453 events.nmi.pending = env->nmi_pending;
2454 events.nmi.masked = !!(env->hflags2 & HF2_NMI_MASK);
2455 events.nmi.pad = 0;
2456
2457 events.sipi_vector = env->sipi_vector;
2458
2459 if (has_msr_smbase) {
2460 events.smi.smm = !!(env->hflags & HF_SMM_MASK);
2461 events.smi.smm_inside_nmi = !!(env->hflags2 & HF2_SMM_INSIDE_NMI_MASK);
2462 if (kvm_irqchip_in_kernel()) {
2463 /* As soon as these are moved to the kernel, remove them
2464 * from cs->interrupt_request.
2465 */
2466 events.smi.pending = cs->interrupt_request & CPU_INTERRUPT_SMI;
2467 events.smi.latched_init = cs->interrupt_request & CPU_INTERRUPT_INIT;
2468 cs->interrupt_request &= ~(CPU_INTERRUPT_INIT | CPU_INTERRUPT_SMI);
2469 } else {
2470 /* Keep these in cs->interrupt_request. */
2471 events.smi.pending = 0;
2472 events.smi.latched_init = 0;
2473 }
2474 events.flags |= KVM_VCPUEVENT_VALID_SMM;
2475 }
2476
2477 events.flags = 0;
2478 if (level >= KVM_PUT_RESET_STATE) {
2479 events.flags |=
2480 KVM_VCPUEVENT_VALID_NMI_PENDING | KVM_VCPUEVENT_VALID_SIPI_VECTOR;
2481 }
2482
2483 return kvm_vcpu_ioctl(CPU(cpu), KVM_SET_VCPU_EVENTS, &events);
2484 }
2485
2486 static int kvm_get_vcpu_events(X86CPU *cpu)
2487 {
2488 CPUX86State *env = &cpu->env;
2489 struct kvm_vcpu_events events;
2490 int ret;
2491
2492 if (!kvm_has_vcpu_events()) {
2493 return 0;
2494 }
2495
2496 memset(&events, 0, sizeof(events));
2497 ret = kvm_vcpu_ioctl(CPU(cpu), KVM_GET_VCPU_EVENTS, &events);
2498 if (ret < 0) {
2499 return ret;
2500 }
2501 env->exception_injected =
2502 events.exception.injected ? events.exception.nr : -1;
2503 env->has_error_code = events.exception.has_error_code;
2504 env->error_code = events.exception.error_code;
2505
2506 env->interrupt_injected =
2507 events.interrupt.injected ? events.interrupt.nr : -1;
2508 env->soft_interrupt = events.interrupt.soft;
2509
2510 env->nmi_injected = events.nmi.injected;
2511 env->nmi_pending = events.nmi.pending;
2512 if (events.nmi.masked) {
2513 env->hflags2 |= HF2_NMI_MASK;
2514 } else {
2515 env->hflags2 &= ~HF2_NMI_MASK;
2516 }
2517
2518 if (events.flags & KVM_VCPUEVENT_VALID_SMM) {
2519 if (events.smi.smm) {
2520 env->hflags |= HF_SMM_MASK;
2521 } else {
2522 env->hflags &= ~HF_SMM_MASK;
2523 }
2524 if (events.smi.pending) {
2525 cpu_interrupt(CPU(cpu), CPU_INTERRUPT_SMI);
2526 } else {
2527 cpu_reset_interrupt(CPU(cpu), CPU_INTERRUPT_SMI);
2528 }
2529 if (events.smi.smm_inside_nmi) {
2530 env->hflags2 |= HF2_SMM_INSIDE_NMI_MASK;
2531 } else {
2532 env->hflags2 &= ~HF2_SMM_INSIDE_NMI_MASK;
2533 }
2534 if (events.smi.latched_init) {
2535 cpu_interrupt(CPU(cpu), CPU_INTERRUPT_INIT);
2536 } else {
2537 cpu_reset_interrupt(CPU(cpu), CPU_INTERRUPT_INIT);
2538 }
2539 }
2540
2541 env->sipi_vector = events.sipi_vector;
2542
2543 return 0;
2544 }
2545
2546 static int kvm_guest_debug_workarounds(X86CPU *cpu)
2547 {
2548 CPUState *cs = CPU(cpu);
2549 CPUX86State *env = &cpu->env;
2550 int ret = 0;
2551 unsigned long reinject_trap = 0;
2552
2553 if (!kvm_has_vcpu_events()) {
2554 if (env->exception_injected == 1) {
2555 reinject_trap = KVM_GUESTDBG_INJECT_DB;
2556 } else if (env->exception_injected == 3) {
2557 reinject_trap = KVM_GUESTDBG_INJECT_BP;
2558 }
2559 env->exception_injected = -1;
2560 }
2561
2562 /*
2563 * Kernels before KVM_CAP_X86_ROBUST_SINGLESTEP overwrote flags.TF
2564 * injected via SET_GUEST_DEBUG while updating GP regs. Work around this
2565 * by updating the debug state once again if single-stepping is on.
2566 * Another reason to call kvm_update_guest_debug here is a pending debug
2567 * trap raise by the guest. On kernels without SET_VCPU_EVENTS we have to
2568 * reinject them via SET_GUEST_DEBUG.
2569 */
2570 if (reinject_trap ||
2571 (!kvm_has_robust_singlestep() && cs->singlestep_enabled)) {
2572 ret = kvm_update_guest_debug(cs, reinject_trap);
2573 }
2574 return ret;
2575 }
2576
2577 static int kvm_put_debugregs(X86CPU *cpu)
2578 {
2579 CPUX86State *env = &cpu->env;
2580 struct kvm_debugregs dbgregs;
2581 int i;
2582
2583 if (!kvm_has_debugregs()) {
2584 return 0;
2585 }
2586
2587 for (i = 0; i < 4; i++) {
2588 dbgregs.db[i] = env->dr[i];
2589 }
2590 dbgregs.dr6 = env->dr[6];
2591 dbgregs.dr7 = env->dr[7];
2592 dbgregs.flags = 0;
2593
2594 return kvm_vcpu_ioctl(CPU(cpu), KVM_SET_DEBUGREGS, &dbgregs);
2595 }
2596
2597 static int kvm_get_debugregs(X86CPU *cpu)
2598 {
2599 CPUX86State *env = &cpu->env;
2600 struct kvm_debugregs dbgregs;
2601 int i, ret;
2602
2603 if (!kvm_has_debugregs()) {
2604 return 0;
2605 }
2606
2607 ret = kvm_vcpu_ioctl(CPU(cpu), KVM_GET_DEBUGREGS, &dbgregs);
2608 if (ret < 0) {
2609 return ret;
2610 }
2611 for (i = 0; i < 4; i++) {
2612 env->dr[i] = dbgregs.db[i];
2613 }
2614 env->dr[4] = env->dr[6] = dbgregs.dr6;
2615 env->dr[5] = env->dr[7] = dbgregs.dr7;
2616
2617 return 0;
2618 }
2619
2620 int kvm_arch_put_registers(CPUState *cpu, int level)
2621 {
2622 X86CPU *x86_cpu = X86_CPU(cpu);
2623 int ret;
2624
2625 assert(cpu_is_stopped(cpu) || qemu_cpu_is_self(cpu));
2626
2627 if (level >= KVM_PUT_RESET_STATE) {
2628 ret = kvm_put_msr_feature_control(x86_cpu);
2629 if (ret < 0) {
2630 return ret;
2631 }
2632 }
2633
2634 if (level == KVM_PUT_FULL_STATE) {
2635 /* We don't check for kvm_arch_set_tsc_khz() errors here,
2636 * because TSC frequency mismatch shouldn't abort migration,
2637 * unless the user explicitly asked for a more strict TSC
2638 * setting (e.g. using an explicit "tsc-freq" option).
2639 */
2640 kvm_arch_set_tsc_khz(cpu);
2641 }
2642
2643 ret = kvm_getput_regs(x86_cpu, 1);
2644 if (ret < 0) {
2645 return ret;
2646 }
2647 ret = kvm_put_xsave(x86_cpu);
2648 if (ret < 0) {
2649 return ret;
2650 }
2651 ret = kvm_put_xcrs(x86_cpu);
2652 if (ret < 0) {
2653 return ret;
2654 }
2655 ret = kvm_put_sregs(x86_cpu);
2656 if (ret < 0) {
2657 return ret;
2658 }
2659 /* must be before kvm_put_msrs */
2660 ret = kvm_inject_mce_oldstyle(x86_cpu);
2661 if (ret < 0) {
2662 return ret;
2663 }
2664 ret = kvm_put_msrs(x86_cpu, level);
2665 if (ret < 0) {
2666 return ret;
2667 }
2668 if (level >= KVM_PUT_RESET_STATE) {
2669 ret = kvm_put_mp_state(x86_cpu);
2670 if (ret < 0) {
2671 return ret;
2672 }
2673 ret = kvm_put_apic(x86_cpu);
2674 if (ret < 0) {
2675 return ret;
2676 }
2677 }
2678
2679 ret = kvm_put_tscdeadline_msr(x86_cpu);
2680 if (ret < 0) {
2681 return ret;
2682 }
2683
2684 ret = kvm_put_vcpu_events(x86_cpu, level);
2685 if (ret < 0) {
2686 return ret;
2687 }
2688 ret = kvm_put_debugregs(x86_cpu);
2689 if (ret < 0) {
2690 return ret;
2691 }
2692 /* must be last */
2693 ret = kvm_guest_debug_workarounds(x86_cpu);
2694 if (ret < 0) {
2695 return ret;
2696 }
2697 return 0;
2698 }
2699
2700 int kvm_arch_get_registers(CPUState *cs)
2701 {
2702 X86CPU *cpu = X86_CPU(cs);
2703 int ret;
2704
2705 assert(cpu_is_stopped(cs) || qemu_cpu_is_self(cs));
2706
2707 ret = kvm_getput_regs(cpu, 0);
2708 if (ret < 0) {
2709 goto out;
2710 }
2711 ret = kvm_get_xsave(cpu);
2712 if (ret < 0) {
2713 goto out;
2714 }
2715 ret = kvm_get_xcrs(cpu);
2716 if (ret < 0) {
2717 goto out;
2718 }
2719 ret = kvm_get_sregs(cpu);
2720 if (ret < 0) {
2721 goto out;
2722 }
2723 ret = kvm_get_msrs(cpu);
2724 if (ret < 0) {
2725 goto out;
2726 }
2727 ret = kvm_get_mp_state(cpu);
2728 if (ret < 0) {
2729 goto out;
2730 }
2731 ret = kvm_get_apic(cpu);
2732 if (ret < 0) {
2733 goto out;
2734 }
2735 ret = kvm_get_vcpu_events(cpu);
2736 if (ret < 0) {
2737 goto out;
2738 }
2739 ret = kvm_get_debugregs(cpu);
2740 if (ret < 0) {
2741 goto out;
2742 }
2743 ret = 0;
2744 out:
2745 cpu_sync_bndcs_hflags(&cpu->env);
2746 return ret;
2747 }
2748
2749 void kvm_arch_pre_run(CPUState *cpu, struct kvm_run *run)
2750 {
2751 X86CPU *x86_cpu = X86_CPU(cpu);
2752 CPUX86State *env = &x86_cpu->env;
2753 int ret;
2754
2755 /* Inject NMI */
2756 if (cpu->interrupt_request & (CPU_INTERRUPT_NMI | CPU_INTERRUPT_SMI)) {
2757 if (cpu->interrupt_request & CPU_INTERRUPT_NMI) {
2758 qemu_mutex_lock_iothread();
2759 cpu->interrupt_request &= ~CPU_INTERRUPT_NMI;
2760 qemu_mutex_unlock_iothread();
2761 DPRINTF("injected NMI\n");
2762 ret = kvm_vcpu_ioctl(cpu, KVM_NMI);
2763 if (ret < 0) {
2764 fprintf(stderr, "KVM: injection failed, NMI lost (%s)\n",
2765 strerror(-ret));
2766 }
2767 }
2768 if (cpu->interrupt_request & CPU_INTERRUPT_SMI) {
2769 qemu_mutex_lock_iothread();
2770 cpu->interrupt_request &= ~CPU_INTERRUPT_SMI;
2771 qemu_mutex_unlock_iothread();
2772 DPRINTF("injected SMI\n");
2773 ret = kvm_vcpu_ioctl(cpu, KVM_SMI);
2774 if (ret < 0) {
2775 fprintf(stderr, "KVM: injection failed, SMI lost (%s)\n",
2776 strerror(-ret));
2777 }
2778 }
2779 }
2780
2781 if (!kvm_pic_in_kernel()) {
2782 qemu_mutex_lock_iothread();
2783 }
2784
2785 /* Force the VCPU out of its inner loop to process any INIT requests
2786 * or (for userspace APIC, but it is cheap to combine the checks here)
2787 * pending TPR access reports.
2788 */
2789 if (cpu->interrupt_request & (CPU_INTERRUPT_INIT | CPU_INTERRUPT_TPR)) {
2790 if ((cpu->interrupt_request & CPU_INTERRUPT_INIT) &&
2791 !(env->hflags & HF_SMM_MASK)) {
2792 cpu->exit_request = 1;
2793 }
2794 if (cpu->interrupt_request & CPU_INTERRUPT_TPR) {
2795 cpu->exit_request = 1;
2796 }
2797 }
2798
2799 if (!kvm_pic_in_kernel()) {
2800 /* Try to inject an interrupt if the guest can accept it */
2801 if (run->ready_for_interrupt_injection &&
2802 (cpu->interrupt_request & CPU_INTERRUPT_HARD) &&
2803 (env->eflags & IF_MASK)) {
2804 int irq;
2805
2806 cpu->interrupt_request &= ~CPU_INTERRUPT_HARD;
2807 irq = cpu_get_pic_interrupt(env);
2808 if (irq >= 0) {
2809 struct kvm_interrupt intr;
2810
2811 intr.irq = irq;
2812 DPRINTF("injected interrupt %d\n", irq);
2813 ret = kvm_vcpu_ioctl(cpu, KVM_INTERRUPT, &intr);
2814 if (ret < 0) {
2815 fprintf(stderr,
2816 "KVM: injection failed, interrupt lost (%s)\n",
2817 strerror(-ret));
2818 }
2819 }
2820 }
2821
2822 /* If we have an interrupt but the guest is not ready to receive an
2823 * interrupt, request an interrupt window exit. This will
2824 * cause a return to userspace as soon as the guest is ready to
2825 * receive interrupts. */
2826 if ((cpu->interrupt_request & CPU_INTERRUPT_HARD)) {
2827 run->request_interrupt_window = 1;
2828 } else {
2829 run->request_interrupt_window = 0;
2830 }
2831
2832 DPRINTF("setting tpr\n");
2833 run->cr8 = cpu_get_apic_tpr(x86_cpu->apic_state);
2834
2835 qemu_mutex_unlock_iothread();
2836 }
2837 }
2838
2839 MemTxAttrs kvm_arch_post_run(CPUState *cpu, struct kvm_run *run)
2840 {
2841 X86CPU *x86_cpu = X86_CPU(cpu);
2842 CPUX86State *env = &x86_cpu->env;
2843
2844 if (run->flags & KVM_RUN_X86_SMM) {
2845 env->hflags |= HF_SMM_MASK;
2846 } else {
2847 env->hflags &= HF_SMM_MASK;
2848 }
2849 if (run->if_flag) {
2850 env->eflags |= IF_MASK;
2851 } else {
2852 env->eflags &= ~IF_MASK;
2853 }
2854
2855 /* We need to protect the apic state against concurrent accesses from
2856 * different threads in case the userspace irqchip is used. */
2857 if (!kvm_irqchip_in_kernel()) {
2858 qemu_mutex_lock_iothread();
2859 }
2860 cpu_set_apic_tpr(x86_cpu->apic_state, run->cr8);
2861 cpu_set_apic_base(x86_cpu->apic_state, run->apic_base);
2862 if (!kvm_irqchip_in_kernel()) {
2863 qemu_mutex_unlock_iothread();
2864 }
2865 return cpu_get_mem_attrs(env);
2866 }
2867
2868 int kvm_arch_process_async_events(CPUState *cs)
2869 {
2870 X86CPU *cpu = X86_CPU(cs);
2871 CPUX86State *env = &cpu->env;
2872
2873 if (cs->interrupt_request & CPU_INTERRUPT_MCE) {
2874 /* We must not raise CPU_INTERRUPT_MCE if it's not supported. */
2875 assert(env->mcg_cap);
2876
2877 cs->interrupt_request &= ~CPU_INTERRUPT_MCE;
2878
2879 kvm_cpu_synchronize_state(cs);
2880
2881 if (env->exception_injected == EXCP08_DBLE) {
2882 /* this means triple fault */
2883 qemu_system_reset_request();
2884 cs->exit_request = 1;
2885 return 0;
2886 }
2887 env->exception_injected = EXCP12_MCHK;
2888 env->has_error_code = 0;
2889
2890 cs->halted = 0;
2891 if (kvm_irqchip_in_kernel() && env->mp_state == KVM_MP_STATE_HALTED) {
2892 env->mp_state = KVM_MP_STATE_RUNNABLE;
2893 }
2894 }
2895
2896 if ((cs->interrupt_request & CPU_INTERRUPT_INIT) &&
2897 !(env->hflags & HF_SMM_MASK)) {
2898 kvm_cpu_synchronize_state(cs);
2899 do_cpu_init(cpu);
2900 }
2901
2902 if (kvm_irqchip_in_kernel()) {
2903 return 0;
2904 }
2905
2906 if (cs->interrupt_request & CPU_INTERRUPT_POLL) {
2907 cs->interrupt_request &= ~CPU_INTERRUPT_POLL;
2908 apic_poll_irq(cpu->apic_state);
2909 }
2910 if (((cs->interrupt_request & CPU_INTERRUPT_HARD) &&
2911 (env->eflags & IF_MASK)) ||
2912 (cs->interrupt_request & CPU_INTERRUPT_NMI)) {
2913 cs->halted = 0;
2914 }
2915 if (cs->interrupt_request & CPU_INTERRUPT_SIPI) {
2916 kvm_cpu_synchronize_state(cs);
2917 do_cpu_sipi(cpu);
2918 }
2919 if (cs->interrupt_request & CPU_INTERRUPT_TPR) {
2920 cs->interrupt_request &= ~CPU_INTERRUPT_TPR;
2921 kvm_cpu_synchronize_state(cs);
2922 apic_handle_tpr_access_report(cpu->apic_state, env->eip,
2923 env->tpr_access_type);
2924 }
2925
2926 return cs->halted;
2927 }
2928
2929 static int kvm_handle_halt(X86CPU *cpu)
2930 {
2931 CPUState *cs = CPU(cpu);
2932 CPUX86State *env = &cpu->env;
2933
2934 if (!((cs->interrupt_request & CPU_INTERRUPT_HARD) &&
2935 (env->eflags & IF_MASK)) &&
2936 !(cs->interrupt_request & CPU_INTERRUPT_NMI)) {
2937 cs->halted = 1;
2938 return EXCP_HLT;
2939 }
2940
2941 return 0;
2942 }
2943
2944 static int kvm_handle_tpr_access(X86CPU *cpu)
2945 {
2946 CPUState *cs = CPU(cpu);
2947 struct kvm_run *run = cs->kvm_run;
2948
2949 apic_handle_tpr_access_report(cpu->apic_state, run->tpr_access.rip,
2950 run->tpr_access.is_write ? TPR_ACCESS_WRITE
2951 : TPR_ACCESS_READ);
2952 return 1;
2953 }
2954
2955 int kvm_arch_insert_sw_breakpoint(CPUState *cs, struct kvm_sw_breakpoint *bp)
2956 {
2957 static const uint8_t int3 = 0xcc;
2958
2959 if (cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)&bp->saved_insn, 1, 0) ||
2960 cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)&int3, 1, 1)) {
2961 return -EINVAL;
2962 }
2963 return 0;
2964 }
2965
2966 int kvm_arch_remove_sw_breakpoint(CPUState *cs, struct kvm_sw_breakpoint *bp)
2967 {
2968 uint8_t int3;
2969
2970 if (cpu_memory_rw_debug(cs, bp->pc, &int3, 1, 0) || int3 != 0xcc ||
2971 cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)&bp->saved_insn, 1, 1)) {
2972 return -EINVAL;
2973 }
2974 return 0;
2975 }
2976
2977 static struct {
2978 target_ulong addr;
2979 int len;
2980 int type;
2981 } hw_breakpoint[4];
2982
2983 static int nb_hw_breakpoint;
2984
2985 static int find_hw_breakpoint(target_ulong addr, int len, int type)
2986 {
2987 int n;
2988
2989 for (n = 0; n < nb_hw_breakpoint; n++) {
2990 if (hw_breakpoint[n].addr == addr && hw_breakpoint[n].type == type &&
2991 (hw_breakpoint[n].len == len || len == -1)) {
2992 return n;
2993 }
2994 }
2995 return -1;
2996 }
2997
2998 int kvm_arch_insert_hw_breakpoint(target_ulong addr,
2999 target_ulong len, int type)
3000 {
3001 switch (type) {
3002 case GDB_BREAKPOINT_HW:
3003 len = 1;
3004 break;
3005 case GDB_WATCHPOINT_WRITE:
3006 case GDB_WATCHPOINT_ACCESS:
3007 switch (len) {
3008 case 1:
3009 break;
3010 case 2:
3011 case 4:
3012 case 8:
3013 if (addr & (len - 1)) {
3014 return -EINVAL;
3015 }
3016 break;
3017 default:
3018 return -EINVAL;
3019 }
3020 break;
3021 default:
3022 return -ENOSYS;
3023 }
3024
3025 if (nb_hw_breakpoint == 4) {
3026 return -ENOBUFS;
3027 }
3028 if (find_hw_breakpoint(addr, len, type) >= 0) {
3029 return -EEXIST;
3030 }
3031 hw_breakpoint[nb_hw_breakpoint].addr = addr;
3032 hw_breakpoint[nb_hw_breakpoint].len = len;
3033 hw_breakpoint[nb_hw_breakpoint].type = type;
3034 nb_hw_breakpoint++;
3035
3036 return 0;
3037 }
3038
3039 int kvm_arch_remove_hw_breakpoint(target_ulong addr,
3040 target_ulong len, int type)
3041 {
3042 int n;
3043
3044 n = find_hw_breakpoint(addr, (type == GDB_BREAKPOINT_HW) ? 1 : len, type);
3045 if (n < 0) {
3046 return -ENOENT;
3047 }
3048 nb_hw_breakpoint--;
3049 hw_breakpoint[n] = hw_breakpoint[nb_hw_breakpoint];
3050
3051 return 0;
3052 }
3053
3054 void kvm_arch_remove_all_hw_breakpoints(void)
3055 {
3056 nb_hw_breakpoint = 0;
3057 }
3058
3059 static CPUWatchpoint hw_watchpoint;
3060
3061 static int kvm_handle_debug(X86CPU *cpu,
3062 struct kvm_debug_exit_arch *arch_info)
3063 {
3064 CPUState *cs = CPU(cpu);
3065 CPUX86State *env = &cpu->env;
3066 int ret = 0;
3067 int n;
3068
3069 if (arch_info->exception == 1) {
3070 if (arch_info->dr6 & (1 << 14)) {
3071 if (cs->singlestep_enabled) {
3072 ret = EXCP_DEBUG;
3073 }
3074 } else {
3075 for (n = 0; n < 4; n++) {
3076 if (arch_info->dr6 & (1 << n)) {
3077 switch ((arch_info->dr7 >> (16 + n*4)) & 0x3) {
3078 case 0x0:
3079 ret = EXCP_DEBUG;
3080 break;
3081 case 0x1:
3082 ret = EXCP_DEBUG;
3083 cs->watchpoint_hit = &hw_watchpoint;
3084 hw_watchpoint.vaddr = hw_breakpoint[n].addr;
3085 hw_watchpoint.flags = BP_MEM_WRITE;
3086 break;
3087 case 0x3:
3088 ret = EXCP_DEBUG;
3089 cs->watchpoint_hit = &hw_watchpoint;
3090 hw_watchpoint.vaddr = hw_breakpoint[n].addr;
3091 hw_watchpoint.flags = BP_MEM_ACCESS;
3092 break;
3093 }
3094 }
3095 }
3096 }
3097 } else if (kvm_find_sw_breakpoint(cs, arch_info->pc)) {
3098 ret = EXCP_DEBUG;
3099 }
3100 if (ret == 0) {
3101 cpu_synchronize_state(cs);
3102 assert(env->exception_injected == -1);
3103
3104 /* pass to guest */
3105 env->exception_injected = arch_info->exception;
3106 env->has_error_code = 0;
3107 }
3108
3109 return ret;
3110 }
3111
3112 void kvm_arch_update_guest_debug(CPUState *cpu, struct kvm_guest_debug *dbg)
3113 {
3114 const uint8_t type_code[] = {
3115 [GDB_BREAKPOINT_HW] = 0x0,
3116 [GDB_WATCHPOINT_WRITE] = 0x1,
3117 [GDB_WATCHPOINT_ACCESS] = 0x3
3118 };
3119 const uint8_t len_code[] = {
3120 [1] = 0x0, [2] = 0x1, [4] = 0x3, [8] = 0x2
3121 };
3122 int n;
3123
3124 if (kvm_sw_breakpoints_active(cpu)) {
3125 dbg->control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_SW_BP;
3126 }
3127 if (nb_hw_breakpoint > 0) {
3128 dbg->control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_HW_BP;
3129 dbg->arch.debugreg[7] = 0x0600;
3130 for (n = 0; n < nb_hw_breakpoint; n++) {
3131 dbg->arch.debugreg[n] = hw_breakpoint[n].addr;
3132 dbg->arch.debugreg[7] |= (2 << (n * 2)) |
3133 (type_code[hw_breakpoint[n].type] << (16 + n*4)) |
3134 ((uint32_t)len_code[hw_breakpoint[n].len] << (18 + n*4));
3135 }
3136 }
3137 }
3138
3139 static bool host_supports_vmx(void)
3140 {
3141 uint32_t ecx, unused;
3142
3143 host_cpuid(1, 0, &unused, &unused, &ecx, &unused);
3144 return ecx & CPUID_EXT_VMX;
3145 }
3146
3147 #define VMX_INVALID_GUEST_STATE 0x80000021
3148
3149 int kvm_arch_handle_exit(CPUState *cs, struct kvm_run *run)
3150 {
3151 X86CPU *cpu = X86_CPU(cs);
3152 uint64_t code;
3153 int ret;
3154
3155 switch (run->exit_reason) {
3156 case KVM_EXIT_HLT:
3157 DPRINTF("handle_hlt\n");
3158 qemu_mutex_lock_iothread();
3159 ret = kvm_handle_halt(cpu);
3160 qemu_mutex_unlock_iothread();
3161 break;
3162 case KVM_EXIT_SET_TPR:
3163 ret = 0;
3164 break;
3165 case KVM_EXIT_TPR_ACCESS:
3166 qemu_mutex_lock_iothread();
3167 ret = kvm_handle_tpr_access(cpu);
3168 qemu_mutex_unlock_iothread();
3169 break;
3170 case KVM_EXIT_FAIL_ENTRY:
3171 code = run->fail_entry.hardware_entry_failure_reason;
3172 fprintf(stderr, "KVM: entry failed, hardware error 0x%" PRIx64 "\n",
3173 code);
3174 if (host_supports_vmx() && code == VMX_INVALID_GUEST_STATE) {
3175 fprintf(stderr,
3176 "\nIf you're running a guest on an Intel machine without "
3177 "unrestricted mode\n"
3178 "support, the failure can be most likely due to the guest "
3179 "entering an invalid\n"
3180 "state for Intel VT. For example, the guest maybe running "
3181 "in big real mode\n"
3182 "which is not supported on less recent Intel processors."
3183 "\n\n");
3184 }
3185 ret = -1;
3186 break;
3187 case KVM_EXIT_EXCEPTION:
3188 fprintf(stderr, "KVM: exception %d exit (error code 0x%x)\n",
3189 run->ex.exception, run->ex.error_code);
3190 ret = -1;
3191 break;
3192 case KVM_EXIT_DEBUG:
3193 DPRINTF("kvm_exit_debug\n");
3194 qemu_mutex_lock_iothread();
3195 ret = kvm_handle_debug(cpu, &run->debug.arch);
3196 qemu_mutex_unlock_iothread();
3197 break;
3198 case KVM_EXIT_HYPERV:
3199 ret = kvm_hv_handle_exit(cpu, &run->hyperv);
3200 break;
3201 case KVM_EXIT_IOAPIC_EOI:
3202 ioapic_eoi_broadcast(run->eoi.vector);
3203 ret = 0;
3204 break;
3205 default:
3206 fprintf(stderr, "KVM: unknown exit reason %d\n", run->exit_reason);
3207 ret = -1;
3208 break;
3209 }
3210
3211 return ret;
3212 }
3213
3214 bool kvm_arch_stop_on_emulation_error(CPUState *cs)
3215 {
3216 X86CPU *cpu = X86_CPU(cs);
3217 CPUX86State *env = &cpu->env;
3218
3219 kvm_cpu_synchronize_state(cs);
3220 return !(env->cr[0] & CR0_PE_MASK) ||
3221 ((env->segs[R_CS].selector & 3) != 3);
3222 }
3223
3224 void kvm_arch_init_irq_routing(KVMState *s)
3225 {
3226 if (!kvm_check_extension(s, KVM_CAP_IRQ_ROUTING)) {
3227 /* If kernel can't do irq routing, interrupt source
3228 * override 0->2 cannot be set up as required by HPET.
3229 * So we have to disable it.
3230 */
3231 no_hpet = 1;
3232 }
3233 /* We know at this point that we're using the in-kernel
3234 * irqchip, so we can use irqfds, and on x86 we know
3235 * we can use msi via irqfd and GSI routing.
3236 */
3237 kvm_msi_via_irqfd_allowed = true;
3238 kvm_gsi_routing_allowed = true;
3239
3240 if (kvm_irqchip_is_split()) {
3241 int i;
3242
3243 /* If the ioapic is in QEMU and the lapics are in KVM, reserve
3244 MSI routes for signaling interrupts to the local apics. */
3245 for (i = 0; i < IOAPIC_NUM_PINS; i++) {
3246 if (kvm_irqchip_add_msi_route(s, 0, NULL) < 0) {
3247 error_report("Could not enable split IRQ mode.");
3248 exit(1);
3249 }
3250 }
3251 }
3252 }
3253
3254 int kvm_arch_irqchip_create(MachineState *ms, KVMState *s)
3255 {
3256 int ret;
3257 if (machine_kernel_irqchip_split(ms)) {
3258 ret = kvm_vm_enable_cap(s, KVM_CAP_SPLIT_IRQCHIP, 0, 24);
3259 if (ret) {
3260 error_report("Could not enable split irqchip mode: %s",
3261 strerror(-ret));
3262 exit(1);
3263 } else {
3264 DPRINTF("Enabled KVM_CAP_SPLIT_IRQCHIP\n");
3265 kvm_split_irqchip = true;
3266 return 1;
3267 }
3268 } else {
3269 return 0;
3270 }
3271 }
3272
3273 /* Classic KVM device assignment interface. Will remain x86 only. */
3274 int kvm_device_pci_assign(KVMState *s, PCIHostDeviceAddress *dev_addr,
3275 uint32_t flags, uint32_t *dev_id)
3276 {
3277 struct kvm_assigned_pci_dev dev_data = {
3278 .segnr = dev_addr->domain,
3279 .busnr = dev_addr->bus,
3280 .devfn = PCI_DEVFN(dev_addr->slot, dev_addr->function),
3281 .flags = flags,
3282 };
3283 int ret;
3284
3285 dev_data.assigned_dev_id =
3286 (dev_addr->domain << 16) | (dev_addr->bus << 8) | dev_data.devfn;
3287
3288 ret = kvm_vm_ioctl(s, KVM_ASSIGN_PCI_DEVICE, &dev_data);
3289 if (ret < 0) {
3290 return ret;
3291 }
3292
3293 *dev_id = dev_data.assigned_dev_id;
3294
3295 return 0;
3296 }
3297
3298 int kvm_device_pci_deassign(KVMState *s, uint32_t dev_id)
3299 {
3300 struct kvm_assigned_pci_dev dev_data = {
3301 .assigned_dev_id = dev_id,
3302 };
3303
3304 return kvm_vm_ioctl(s, KVM_DEASSIGN_PCI_DEVICE, &dev_data);
3305 }
3306
3307 static int kvm_assign_irq_internal(KVMState *s, uint32_t dev_id,
3308 uint32_t irq_type, uint32_t guest_irq)
3309 {
3310 struct kvm_assigned_irq assigned_irq = {
3311 .assigned_dev_id = dev_id,
3312 .guest_irq = guest_irq,
3313 .flags = irq_type,
3314 };
3315
3316 if (kvm_check_extension(s, KVM_CAP_ASSIGN_DEV_IRQ)) {
3317 return kvm_vm_ioctl(s, KVM_ASSIGN_DEV_IRQ, &assigned_irq);
3318 } else {
3319 return kvm_vm_ioctl(s, KVM_ASSIGN_IRQ, &assigned_irq);
3320 }
3321 }
3322
3323 int kvm_device_intx_assign(KVMState *s, uint32_t dev_id, bool use_host_msi,
3324 uint32_t guest_irq)
3325 {
3326 uint32_t irq_type = KVM_DEV_IRQ_GUEST_INTX |
3327 (use_host_msi ? KVM_DEV_IRQ_HOST_MSI : KVM_DEV_IRQ_HOST_INTX);
3328
3329 return kvm_assign_irq_internal(s, dev_id, irq_type, guest_irq);
3330 }
3331
3332 int kvm_device_intx_set_mask(KVMState *s, uint32_t dev_id, bool masked)
3333 {
3334 struct kvm_assigned_pci_dev dev_data = {
3335 .assigned_dev_id = dev_id,
3336 .flags = masked ? KVM_DEV_ASSIGN_MASK_INTX : 0,
3337 };
3338
3339 return kvm_vm_ioctl(s, KVM_ASSIGN_SET_INTX_MASK, &dev_data);
3340 }
3341
3342 static int kvm_deassign_irq_internal(KVMState *s, uint32_t dev_id,
3343 uint32_t type)
3344 {
3345 struct kvm_assigned_irq assigned_irq = {
3346 .assigned_dev_id = dev_id,
3347 .flags = type,
3348 };
3349
3350 return kvm_vm_ioctl(s, KVM_DEASSIGN_DEV_IRQ, &assigned_irq);
3351 }
3352
3353 int kvm_device_intx_deassign(KVMState *s, uint32_t dev_id, bool use_host_msi)
3354 {
3355 return kvm_deassign_irq_internal(s, dev_id, KVM_DEV_IRQ_GUEST_INTX |
3356 (use_host_msi ? KVM_DEV_IRQ_HOST_MSI : KVM_DEV_IRQ_HOST_INTX));
3357 }
3358
3359 int kvm_device_msi_assign(KVMState *s, uint32_t dev_id, int virq)
3360 {
3361 return kvm_assign_irq_internal(s, dev_id, KVM_DEV_IRQ_HOST_MSI |
3362 KVM_DEV_IRQ_GUEST_MSI, virq);
3363 }
3364
3365 int kvm_device_msi_deassign(KVMState *s, uint32_t dev_id)
3366 {
3367 return kvm_deassign_irq_internal(s, dev_id, KVM_DEV_IRQ_GUEST_MSI |
3368 KVM_DEV_IRQ_HOST_MSI);
3369 }
3370
3371 bool kvm_device_msix_supported(KVMState *s)
3372 {
3373 /* The kernel lacks a corresponding KVM_CAP, so we probe by calling
3374 * KVM_ASSIGN_SET_MSIX_NR with an invalid parameter. */
3375 return kvm_vm_ioctl(s, KVM_ASSIGN_SET_MSIX_NR, NULL) == -EFAULT;
3376 }
3377
3378 int kvm_device_msix_init_vectors(KVMState *s, uint32_t dev_id,
3379 uint32_t nr_vectors)
3380 {
3381 struct kvm_assigned_msix_nr msix_nr = {
3382 .assigned_dev_id = dev_id,
3383 .entry_nr = nr_vectors,
3384 };
3385
3386 return kvm_vm_ioctl(s, KVM_ASSIGN_SET_MSIX_NR, &msix_nr);
3387 }
3388
3389 int kvm_device_msix_set_vector(KVMState *s, uint32_t dev_id, uint32_t vector,
3390 int virq)
3391 {
3392 struct kvm_assigned_msix_entry msix_entry = {
3393 .assigned_dev_id = dev_id,
3394 .gsi = virq,
3395 .entry = vector,
3396 };
3397
3398 return kvm_vm_ioctl(s, KVM_ASSIGN_SET_MSIX_ENTRY, &msix_entry);
3399 }
3400
3401 int kvm_device_msix_assign(KVMState *s, uint32_t dev_id)
3402 {
3403 return kvm_assign_irq_internal(s, dev_id, KVM_DEV_IRQ_HOST_MSIX |
3404 KVM_DEV_IRQ_GUEST_MSIX, 0);
3405 }
3406
3407 int kvm_device_msix_deassign(KVMState *s, uint32_t dev_id)
3408 {
3409 return kvm_deassign_irq_internal(s, dev_id, KVM_DEV_IRQ_GUEST_MSIX |
3410 KVM_DEV_IRQ_HOST_MSIX);
3411 }
3412
3413 int kvm_arch_fixup_msi_route(struct kvm_irq_routing_entry *route,
3414 uint64_t address, uint32_t data, PCIDevice *dev)
3415 {
3416 X86IOMMUState *iommu = x86_iommu_get_default();
3417
3418 if (iommu) {
3419 int ret;
3420 MSIMessage src, dst;
3421 X86IOMMUClass *class = X86_IOMMU_GET_CLASS(iommu);
3422
3423 src.address = route->u.msi.address_hi;
3424 src.address <<= VTD_MSI_ADDR_HI_SHIFT;
3425 src.address |= route->u.msi.address_lo;
3426 src.data = route->u.msi.data;
3427
3428 ret = class->int_remap(iommu, &src, &dst, dev ? \
3429 pci_requester_id(dev) : \
3430 X86_IOMMU_SID_INVALID);
3431 if (ret) {
3432 trace_kvm_x86_fixup_msi_error(route->gsi);
3433 return 1;
3434 }
3435
3436 route->u.msi.address_hi = dst.address >> VTD_MSI_ADDR_HI_SHIFT;
3437 route->u.msi.address_lo = dst.address & VTD_MSI_ADDR_LO_MASK;
3438 route->u.msi.data = dst.data;
3439 }
3440
3441 return 0;
3442 }
3443
3444 typedef struct MSIRouteEntry MSIRouteEntry;
3445
3446 struct MSIRouteEntry {
3447 PCIDevice *dev; /* Device pointer */
3448 int vector; /* MSI/MSIX vector index */
3449 int virq; /* Virtual IRQ index */
3450 QLIST_ENTRY(MSIRouteEntry) list;
3451 };
3452
3453 /* List of used GSI routes */
3454 static QLIST_HEAD(, MSIRouteEntry) msi_route_list = \
3455 QLIST_HEAD_INITIALIZER(msi_route_list);
3456
3457 static void kvm_update_msi_routes_all(void *private, bool global,
3458 uint32_t index, uint32_t mask)
3459 {
3460 int cnt = 0;
3461 MSIRouteEntry *entry;
3462 MSIMessage msg;
3463 /* TODO: explicit route update */
3464 QLIST_FOREACH(entry, &msi_route_list, list) {
3465 cnt++;
3466 msg = pci_get_msi_message(entry->dev, entry->vector);
3467 kvm_irqchip_update_msi_route(kvm_state, entry->virq,
3468 msg, entry->dev);
3469 }
3470 kvm_irqchip_commit_routes(kvm_state);
3471 trace_kvm_x86_update_msi_routes(cnt);
3472 }
3473
3474 int kvm_arch_add_msi_route_post(struct kvm_irq_routing_entry *route,
3475 int vector, PCIDevice *dev)
3476 {
3477 static bool notify_list_inited = false;
3478 MSIRouteEntry *entry;
3479
3480 if (!dev) {
3481 /* These are (possibly) IOAPIC routes only used for split
3482 * kernel irqchip mode, while what we are housekeeping are
3483 * PCI devices only. */
3484 return 0;
3485 }
3486
3487 entry = g_new0(MSIRouteEntry, 1);
3488 entry->dev = dev;
3489 entry->vector = vector;
3490 entry->virq = route->gsi;
3491 QLIST_INSERT_HEAD(&msi_route_list, entry, list);
3492
3493 trace_kvm_x86_add_msi_route(route->gsi);
3494
3495 if (!notify_list_inited) {
3496 /* For the first time we do add route, add ourselves into
3497 * IOMMU's IEC notify list if needed. */
3498 X86IOMMUState *iommu = x86_iommu_get_default();
3499 if (iommu) {
3500 x86_iommu_iec_register_notifier(iommu,
3501 kvm_update_msi_routes_all,
3502 NULL);
3503 }
3504 notify_list_inited = true;
3505 }
3506 return 0;
3507 }
3508
3509 int kvm_arch_release_virq_post(int virq)
3510 {
3511 MSIRouteEntry *entry, *next;
3512 QLIST_FOREACH_SAFE(entry, &msi_route_list, list, next) {
3513 if (entry->virq == virq) {
3514 trace_kvm_x86_remove_msi_route(virq);
3515 QLIST_REMOVE(entry, list);
3516 break;
3517 }
3518 }
3519 return 0;
3520 }
3521
3522 int kvm_arch_msi_data_to_gsi(uint32_t data)
3523 {
3524 abort();
3525 }
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