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/qapi-events-run-state.h" 17 #include "qapi/error.h" 18 #include "qapi/visitor.h" 19 #include <sys/ioctl.h> 20 #include <sys/utsname.h> 21 #include <sys/syscall.h> 22 23 #include <linux/kvm.h> 24 #include "standard-headers/asm-x86/kvm_para.h" 25 #include "hw/xen/interface/arch-x86/cpuid.h" 26 27 #include "cpu.h" 28 #include "host-cpu.h" 29 #include "sysemu/sysemu.h" 30 #include "sysemu/hw_accel.h" 31 #include "sysemu/kvm_int.h" 32 #include "sysemu/runstate.h" 33 #include "kvm_i386.h" 34 #include "sev.h" 35 #include "xen-emu.h" 36 #include "hyperv.h" 37 #include "hyperv-proto.h" 38 39 #include "exec/gdbstub.h" 40 #include "qemu/host-utils.h" 41 #include "qemu/main-loop.h" 42 #include "qemu/ratelimit.h" 43 #include "qemu/config-file.h" 44 #include "qemu/error-report.h" 45 #include "qemu/memalign.h" 46 #include "hw/i386/x86.h" 47 #include "hw/i386/kvm/xen_evtchn.h" 48 #include "hw/i386/pc.h" 49 #include "hw/i386/apic.h" 50 #include "hw/i386/apic_internal.h" 51 #include "hw/i386/apic-msidef.h" 52 #include "hw/i386/intel_iommu.h" 53 #include "hw/i386/x86-iommu.h" 54 #include "hw/i386/e820_memory_layout.h" 55 56 #include "hw/xen/xen.h" 57 58 #include "hw/pci/pci.h" 59 #include "hw/pci/msi.h" 60 #include "hw/pci/msix.h" 61 #include "migration/blocker.h" 62 #include "exec/memattrs.h" 63 #include "trace.h" 64 65 #include CONFIG_DEVICES 66 67 //#define DEBUG_KVM 68 69 #ifdef DEBUG_KVM 70 #define DPRINTF(fmt, ...) \ 71 do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) 72 #else 73 #define DPRINTF(fmt, ...) \ 74 do { } while (0) 75 #endif 76 77 /* From arch/x86/kvm/lapic.h */ 78 #define KVM_APIC_BUS_CYCLE_NS 1 79 #define KVM_APIC_BUS_FREQUENCY (1000000000ULL / KVM_APIC_BUS_CYCLE_NS) 80 81 #define MSR_KVM_WALL_CLOCK 0x11 82 #define MSR_KVM_SYSTEM_TIME 0x12 83 84 /* A 4096-byte buffer can hold the 8-byte kvm_msrs header, plus 85 * 255 kvm_msr_entry structs */ 86 #define MSR_BUF_SIZE 4096 87 88 static void kvm_init_msrs(X86CPU *cpu); 89 90 const KVMCapabilityInfo kvm_arch_required_capabilities[] = { 91 KVM_CAP_INFO(SET_TSS_ADDR), 92 KVM_CAP_INFO(EXT_CPUID), 93 KVM_CAP_INFO(MP_STATE), 94 KVM_CAP_INFO(SIGNAL_MSI), 95 KVM_CAP_INFO(IRQ_ROUTING), 96 KVM_CAP_INFO(DEBUGREGS), 97 KVM_CAP_INFO(XSAVE), 98 KVM_CAP_INFO(VCPU_EVENTS), 99 KVM_CAP_INFO(X86_ROBUST_SINGLESTEP), 100 KVM_CAP_INFO(MCE), 101 KVM_CAP_INFO(ADJUST_CLOCK), 102 KVM_CAP_INFO(SET_IDENTITY_MAP_ADDR), 103 KVM_CAP_LAST_INFO 104 }; 105 106 static bool has_msr_star; 107 static bool has_msr_hsave_pa; 108 static bool has_msr_tsc_aux; 109 static bool has_msr_tsc_adjust; 110 static bool has_msr_tsc_deadline; 111 static bool has_msr_feature_control; 112 static bool has_msr_misc_enable; 113 static bool has_msr_smbase; 114 static bool has_msr_bndcfgs; 115 static int lm_capable_kernel; 116 static bool has_msr_hv_hypercall; 117 static bool has_msr_hv_crash; 118 static bool has_msr_hv_reset; 119 static bool has_msr_hv_vpindex; 120 static bool hv_vpindex_settable; 121 static bool has_msr_hv_runtime; 122 static bool has_msr_hv_synic; 123 static bool has_msr_hv_stimer; 124 static bool has_msr_hv_frequencies; 125 static bool has_msr_hv_reenlightenment; 126 static bool has_msr_hv_syndbg_options; 127 static bool has_msr_xss; 128 static bool has_msr_umwait; 129 static bool has_msr_spec_ctrl; 130 static bool has_tsc_scale_msr; 131 static bool has_msr_tsx_ctrl; 132 static bool has_msr_virt_ssbd; 133 static bool has_msr_smi_count; 134 static bool has_msr_arch_capabs; 135 static bool has_msr_core_capabs; 136 static bool has_msr_vmx_vmfunc; 137 static bool has_msr_ucode_rev; 138 static bool has_msr_vmx_procbased_ctls2; 139 static bool has_msr_perf_capabs; 140 static bool has_msr_pkrs; 141 142 static uint32_t has_architectural_pmu_version; 143 static uint32_t num_architectural_pmu_gp_counters; 144 static uint32_t num_architectural_pmu_fixed_counters; 145 146 static int has_xsave2; 147 static int has_xcrs; 148 static int has_sregs2; 149 static int has_exception_payload; 150 static int has_triple_fault_event; 151 152 static bool has_msr_mcg_ext_ctl; 153 154 static struct kvm_cpuid2 *cpuid_cache; 155 static struct kvm_cpuid2 *hv_cpuid_cache; 156 static struct kvm_msr_list *kvm_feature_msrs; 157 158 static KVMMSRHandlers msr_handlers[KVM_MSR_FILTER_MAX_RANGES]; 159 160 #define BUS_LOCK_SLICE_TIME 1000000000ULL /* ns */ 161 static RateLimit bus_lock_ratelimit_ctrl; 162 static int kvm_get_one_msr(X86CPU *cpu, int index, uint64_t *value); 163 164 bool kvm_has_smm(void) 165 { 166 return kvm_vm_check_extension(kvm_state, KVM_CAP_X86_SMM); 167 } 168 169 bool kvm_has_adjust_clock_stable(void) 170 { 171 int ret = kvm_check_extension(kvm_state, KVM_CAP_ADJUST_CLOCK); 172 173 return (ret & KVM_CLOCK_TSC_STABLE); 174 } 175 176 bool kvm_has_exception_payload(void) 177 { 178 return has_exception_payload; 179 } 180 181 static bool kvm_x2apic_api_set_flags(uint64_t flags) 182 { 183 KVMState *s = KVM_STATE(current_accel()); 184 185 return !kvm_vm_enable_cap(s, KVM_CAP_X2APIC_API, 0, flags); 186 } 187 188 #define MEMORIZE(fn, _result) \ 189 ({ \ 190 static bool _memorized; \ 191 \ 192 if (_memorized) { \ 193 return _result; \ 194 } \ 195 _memorized = true; \ 196 _result = fn; \ 197 }) 198 199 static bool has_x2apic_api; 200 201 bool kvm_has_x2apic_api(void) 202 { 203 return has_x2apic_api; 204 } 205 206 bool kvm_enable_x2apic(void) 207 { 208 return MEMORIZE( 209 kvm_x2apic_api_set_flags(KVM_X2APIC_API_USE_32BIT_IDS | 210 KVM_X2APIC_API_DISABLE_BROADCAST_QUIRK), 211 has_x2apic_api); 212 } 213 214 bool kvm_hv_vpindex_settable(void) 215 { 216 return hv_vpindex_settable; 217 } 218 219 static int kvm_get_tsc(CPUState *cs) 220 { 221 X86CPU *cpu = X86_CPU(cs); 222 CPUX86State *env = &cpu->env; 223 uint64_t value; 224 int ret; 225 226 if (env->tsc_valid) { 227 return 0; 228 } 229 230 env->tsc_valid = !runstate_is_running(); 231 232 ret = kvm_get_one_msr(cpu, MSR_IA32_TSC, &value); 233 if (ret < 0) { 234 return ret; 235 } 236 237 env->tsc = value; 238 return 0; 239 } 240 241 static inline void do_kvm_synchronize_tsc(CPUState *cpu, run_on_cpu_data arg) 242 { 243 kvm_get_tsc(cpu); 244 } 245 246 void kvm_synchronize_all_tsc(void) 247 { 248 CPUState *cpu; 249 250 if (kvm_enabled()) { 251 CPU_FOREACH(cpu) { 252 run_on_cpu(cpu, do_kvm_synchronize_tsc, RUN_ON_CPU_NULL); 253 } 254 } 255 } 256 257 static struct kvm_cpuid2 *try_get_cpuid(KVMState *s, int max) 258 { 259 struct kvm_cpuid2 *cpuid; 260 int r, size; 261 262 size = sizeof(*cpuid) + max * sizeof(*cpuid->entries); 263 cpuid = g_malloc0(size); 264 cpuid->nent = max; 265 r = kvm_ioctl(s, KVM_GET_SUPPORTED_CPUID, cpuid); 266 if (r == 0 && cpuid->nent >= max) { 267 r = -E2BIG; 268 } 269 if (r < 0) { 270 if (r == -E2BIG) { 271 g_free(cpuid); 272 return NULL; 273 } else { 274 fprintf(stderr, "KVM_GET_SUPPORTED_CPUID failed: %s\n", 275 strerror(-r)); 276 exit(1); 277 } 278 } 279 return cpuid; 280 } 281 282 /* Run KVM_GET_SUPPORTED_CPUID ioctl(), allocating a buffer large enough 283 * for all entries. 284 */ 285 static struct kvm_cpuid2 *get_supported_cpuid(KVMState *s) 286 { 287 struct kvm_cpuid2 *cpuid; 288 int max = 1; 289 290 if (cpuid_cache != NULL) { 291 return cpuid_cache; 292 } 293 while ((cpuid = try_get_cpuid(s, max)) == NULL) { 294 max *= 2; 295 } 296 cpuid_cache = cpuid; 297 return cpuid; 298 } 299 300 static bool host_tsx_broken(void) 301 { 302 int family, model, stepping;\ 303 char vendor[CPUID_VENDOR_SZ + 1]; 304 305 host_cpu_vendor_fms(vendor, &family, &model, &stepping); 306 307 /* Check if we are running on a Haswell host known to have broken TSX */ 308 return !strcmp(vendor, CPUID_VENDOR_INTEL) && 309 (family == 6) && 310 ((model == 63 && stepping < 4) || 311 model == 60 || model == 69 || model == 70); 312 } 313 314 /* Returns the value for a specific register on the cpuid entry 315 */ 316 static uint32_t cpuid_entry_get_reg(struct kvm_cpuid_entry2 *entry, int reg) 317 { 318 uint32_t ret = 0; 319 switch (reg) { 320 case R_EAX: 321 ret = entry->eax; 322 break; 323 case R_EBX: 324 ret = entry->ebx; 325 break; 326 case R_ECX: 327 ret = entry->ecx; 328 break; 329 case R_EDX: 330 ret = entry->edx; 331 break; 332 } 333 return ret; 334 } 335 336 /* Find matching entry for function/index on kvm_cpuid2 struct 337 */ 338 static struct kvm_cpuid_entry2 *cpuid_find_entry(struct kvm_cpuid2 *cpuid, 339 uint32_t function, 340 uint32_t index) 341 { 342 int i; 343 for (i = 0; i < cpuid->nent; ++i) { 344 if (cpuid->entries[i].function == function && 345 cpuid->entries[i].index == index) { 346 return &cpuid->entries[i]; 347 } 348 } 349 /* not found: */ 350 return NULL; 351 } 352 353 uint32_t kvm_arch_get_supported_cpuid(KVMState *s, uint32_t function, 354 uint32_t index, int reg) 355 { 356 struct kvm_cpuid2 *cpuid; 357 uint32_t ret = 0; 358 uint32_t cpuid_1_edx, unused; 359 uint64_t bitmask; 360 361 cpuid = get_supported_cpuid(s); 362 363 struct kvm_cpuid_entry2 *entry = cpuid_find_entry(cpuid, function, index); 364 if (entry) { 365 ret = cpuid_entry_get_reg(entry, reg); 366 } 367 368 /* Fixups for the data returned by KVM, below */ 369 370 if (function == 1 && reg == R_EDX) { 371 /* KVM before 2.6.30 misreports the following features */ 372 ret |= CPUID_MTRR | CPUID_PAT | CPUID_MCE | CPUID_MCA; 373 /* KVM never reports CPUID_HT but QEMU can support when vcpus > 1 */ 374 ret |= CPUID_HT; 375 } else if (function == 1 && reg == R_ECX) { 376 /* We can set the hypervisor flag, even if KVM does not return it on 377 * GET_SUPPORTED_CPUID 378 */ 379 ret |= CPUID_EXT_HYPERVISOR; 380 /* tsc-deadline flag is not returned by GET_SUPPORTED_CPUID, but it 381 * can be enabled if the kernel has KVM_CAP_TSC_DEADLINE_TIMER, 382 * and the irqchip is in the kernel. 383 */ 384 if (kvm_irqchip_in_kernel() && 385 kvm_check_extension(s, KVM_CAP_TSC_DEADLINE_TIMER)) { 386 ret |= CPUID_EXT_TSC_DEADLINE_TIMER; 387 } 388 389 /* x2apic is reported by GET_SUPPORTED_CPUID, but it can't be enabled 390 * without the in-kernel irqchip 391 */ 392 if (!kvm_irqchip_in_kernel()) { 393 ret &= ~CPUID_EXT_X2APIC; 394 } 395 396 if (enable_cpu_pm) { 397 int disable_exits = kvm_check_extension(s, 398 KVM_CAP_X86_DISABLE_EXITS); 399 400 if (disable_exits & KVM_X86_DISABLE_EXITS_MWAIT) { 401 ret |= CPUID_EXT_MONITOR; 402 } 403 } 404 } else if (function == 6 && reg == R_EAX) { 405 ret |= CPUID_6_EAX_ARAT; /* safe to allow because of emulated APIC */ 406 } else if (function == 7 && index == 0 && reg == R_EBX) { 407 /* Not new instructions, just an optimization. */ 408 uint32_t ebx; 409 host_cpuid(7, 0, &unused, &ebx, &unused, &unused); 410 ret |= ebx & CPUID_7_0_EBX_ERMS; 411 412 if (host_tsx_broken()) { 413 ret &= ~(CPUID_7_0_EBX_RTM | CPUID_7_0_EBX_HLE); 414 } 415 } else if (function == 7 && index == 0 && reg == R_EDX) { 416 /* Not new instructions, just an optimization. */ 417 uint32_t edx; 418 host_cpuid(7, 0, &unused, &unused, &unused, &edx); 419 ret |= edx & CPUID_7_0_EDX_FSRM; 420 421 /* 422 * Linux v4.17-v4.20 incorrectly return ARCH_CAPABILITIES on SVM hosts. 423 * We can detect the bug by checking if MSR_IA32_ARCH_CAPABILITIES is 424 * returned by KVM_GET_MSR_INDEX_LIST. 425 */ 426 if (!has_msr_arch_capabs) { 427 ret &= ~CPUID_7_0_EDX_ARCH_CAPABILITIES; 428 } 429 } else if (function == 7 && index == 1 && reg == R_EAX) { 430 /* Not new instructions, just an optimization. */ 431 uint32_t eax; 432 host_cpuid(7, 1, &eax, &unused, &unused, &unused); 433 ret |= eax & (CPUID_7_1_EAX_FZRM | CPUID_7_1_EAX_FSRS | CPUID_7_1_EAX_FSRC); 434 } else if (function == 7 && index == 2 && reg == R_EDX) { 435 uint32_t edx; 436 host_cpuid(7, 2, &unused, &unused, &unused, &edx); 437 ret |= edx & CPUID_7_2_EDX_MCDT_NO; 438 } else if (function == 0xd && index == 0 && 439 (reg == R_EAX || reg == R_EDX)) { 440 /* 441 * The value returned by KVM_GET_SUPPORTED_CPUID does not include 442 * features that still have to be enabled with the arch_prctl 443 * system call. QEMU needs the full value, which is retrieved 444 * with KVM_GET_DEVICE_ATTR. 445 */ 446 struct kvm_device_attr attr = { 447 .group = 0, 448 .attr = KVM_X86_XCOMP_GUEST_SUPP, 449 .addr = (unsigned long) &bitmask 450 }; 451 452 bool sys_attr = kvm_check_extension(s, KVM_CAP_SYS_ATTRIBUTES); 453 if (!sys_attr) { 454 return ret; 455 } 456 457 int rc = kvm_ioctl(s, KVM_GET_DEVICE_ATTR, &attr); 458 if (rc < 0) { 459 if (rc != -ENXIO) { 460 warn_report("KVM_GET_DEVICE_ATTR(0, KVM_X86_XCOMP_GUEST_SUPP) " 461 "error: %d", rc); 462 } 463 return ret; 464 } 465 ret = (reg == R_EAX) ? bitmask : bitmask >> 32; 466 } else if (function == 0x80000001 && reg == R_ECX) { 467 /* 468 * It's safe to enable TOPOEXT even if it's not returned by 469 * GET_SUPPORTED_CPUID. Unconditionally enabling TOPOEXT here allows 470 * us to keep CPU models including TOPOEXT runnable on older kernels. 471 */ 472 ret |= CPUID_EXT3_TOPOEXT; 473 } else if (function == 0x80000001 && reg == R_EDX) { 474 /* On Intel, kvm returns cpuid according to the Intel spec, 475 * so add missing bits according to the AMD spec: 476 */ 477 cpuid_1_edx = kvm_arch_get_supported_cpuid(s, 1, 0, R_EDX); 478 ret |= cpuid_1_edx & CPUID_EXT2_AMD_ALIASES; 479 } else if (function == KVM_CPUID_FEATURES && reg == R_EAX) { 480 /* kvm_pv_unhalt is reported by GET_SUPPORTED_CPUID, but it can't 481 * be enabled without the in-kernel irqchip 482 */ 483 if (!kvm_irqchip_in_kernel()) { 484 ret &= ~(1U << KVM_FEATURE_PV_UNHALT); 485 } 486 if (kvm_irqchip_is_split()) { 487 ret |= 1U << KVM_FEATURE_MSI_EXT_DEST_ID; 488 } 489 } else if (function == KVM_CPUID_FEATURES && reg == R_EDX) { 490 ret |= 1U << KVM_HINTS_REALTIME; 491 } 492 493 return ret; 494 } 495 496 uint64_t kvm_arch_get_supported_msr_feature(KVMState *s, uint32_t index) 497 { 498 struct { 499 struct kvm_msrs info; 500 struct kvm_msr_entry entries[1]; 501 } msr_data = {}; 502 uint64_t value; 503 uint32_t ret, can_be_one, must_be_one; 504 505 if (kvm_feature_msrs == NULL) { /* Host doesn't support feature MSRs */ 506 return 0; 507 } 508 509 /* Check if requested MSR is supported feature MSR */ 510 int i; 511 for (i = 0; i < kvm_feature_msrs->nmsrs; i++) 512 if (kvm_feature_msrs->indices[i] == index) { 513 break; 514 } 515 if (i == kvm_feature_msrs->nmsrs) { 516 return 0; /* if the feature MSR is not supported, simply return 0 */ 517 } 518 519 msr_data.info.nmsrs = 1; 520 msr_data.entries[0].index = index; 521 522 ret = kvm_ioctl(s, KVM_GET_MSRS, &msr_data); 523 if (ret != 1) { 524 error_report("KVM get MSR (index=0x%x) feature failed, %s", 525 index, strerror(-ret)); 526 exit(1); 527 } 528 529 value = msr_data.entries[0].data; 530 switch (index) { 531 case MSR_IA32_VMX_PROCBASED_CTLS2: 532 if (!has_msr_vmx_procbased_ctls2) { 533 /* KVM forgot to add these bits for some time, do this ourselves. */ 534 if (kvm_arch_get_supported_cpuid(s, 0xD, 1, R_ECX) & 535 CPUID_XSAVE_XSAVES) { 536 value |= (uint64_t)VMX_SECONDARY_EXEC_XSAVES << 32; 537 } 538 if (kvm_arch_get_supported_cpuid(s, 1, 0, R_ECX) & 539 CPUID_EXT_RDRAND) { 540 value |= (uint64_t)VMX_SECONDARY_EXEC_RDRAND_EXITING << 32; 541 } 542 if (kvm_arch_get_supported_cpuid(s, 7, 0, R_EBX) & 543 CPUID_7_0_EBX_INVPCID) { 544 value |= (uint64_t)VMX_SECONDARY_EXEC_ENABLE_INVPCID << 32; 545 } 546 if (kvm_arch_get_supported_cpuid(s, 7, 0, R_EBX) & 547 CPUID_7_0_EBX_RDSEED) { 548 value |= (uint64_t)VMX_SECONDARY_EXEC_RDSEED_EXITING << 32; 549 } 550 if (kvm_arch_get_supported_cpuid(s, 0x80000001, 0, R_EDX) & 551 CPUID_EXT2_RDTSCP) { 552 value |= (uint64_t)VMX_SECONDARY_EXEC_RDTSCP << 32; 553 } 554 } 555 /* fall through */ 556 case MSR_IA32_VMX_TRUE_PINBASED_CTLS: 557 case MSR_IA32_VMX_TRUE_PROCBASED_CTLS: 558 case MSR_IA32_VMX_TRUE_ENTRY_CTLS: 559 case MSR_IA32_VMX_TRUE_EXIT_CTLS: 560 /* 561 * Return true for bits that can be one, but do not have to be one. 562 * The SDM tells us which bits could have a "must be one" setting, 563 * so we can do the opposite transformation in make_vmx_msr_value. 564 */ 565 must_be_one = (uint32_t)value; 566 can_be_one = (uint32_t)(value >> 32); 567 return can_be_one & ~must_be_one; 568 569 default: 570 return value; 571 } 572 } 573 574 static int kvm_get_mce_cap_supported(KVMState *s, uint64_t *mce_cap, 575 int *max_banks) 576 { 577 *max_banks = kvm_check_extension(s, KVM_CAP_MCE); 578 return kvm_ioctl(s, KVM_X86_GET_MCE_CAP_SUPPORTED, mce_cap); 579 } 580 581 static void kvm_mce_inject(X86CPU *cpu, hwaddr paddr, int code) 582 { 583 CPUState *cs = CPU(cpu); 584 CPUX86State *env = &cpu->env; 585 uint64_t status = MCI_STATUS_VAL | MCI_STATUS_UC | MCI_STATUS_EN | 586 MCI_STATUS_MISCV | MCI_STATUS_ADDRV | MCI_STATUS_S; 587 uint64_t mcg_status = MCG_STATUS_MCIP; 588 int flags = 0; 589 590 if (code == BUS_MCEERR_AR) { 591 status |= MCI_STATUS_AR | 0x134; 592 mcg_status |= MCG_STATUS_RIPV | MCG_STATUS_EIPV; 593 } else { 594 status |= 0xc0; 595 mcg_status |= MCG_STATUS_RIPV; 596 } 597 598 flags = cpu_x86_support_mca_broadcast(env) ? MCE_INJECT_BROADCAST : 0; 599 /* We need to read back the value of MSR_EXT_MCG_CTL that was set by the 600 * guest kernel back into env->mcg_ext_ctl. 601 */ 602 cpu_synchronize_state(cs); 603 if (env->mcg_ext_ctl & MCG_EXT_CTL_LMCE_EN) { 604 mcg_status |= MCG_STATUS_LMCE; 605 flags = 0; 606 } 607 608 cpu_x86_inject_mce(NULL, cpu, 9, status, mcg_status, paddr, 609 (MCM_ADDR_PHYS << 6) | 0xc, flags); 610 } 611 612 static void emit_hypervisor_memory_failure(MemoryFailureAction action, bool ar) 613 { 614 MemoryFailureFlags mff = {.action_required = ar, .recursive = false}; 615 616 qapi_event_send_memory_failure(MEMORY_FAILURE_RECIPIENT_HYPERVISOR, action, 617 &mff); 618 } 619 620 static void hardware_memory_error(void *host_addr) 621 { 622 emit_hypervisor_memory_failure(MEMORY_FAILURE_ACTION_FATAL, true); 623 error_report("QEMU got Hardware memory error at addr %p", host_addr); 624 exit(1); 625 } 626 627 void kvm_arch_on_sigbus_vcpu(CPUState *c, int code, void *addr) 628 { 629 X86CPU *cpu = X86_CPU(c); 630 CPUX86State *env = &cpu->env; 631 ram_addr_t ram_addr; 632 hwaddr paddr; 633 634 /* If we get an action required MCE, it has been injected by KVM 635 * while the VM was running. An action optional MCE instead should 636 * be coming from the main thread, which qemu_init_sigbus identifies 637 * as the "early kill" thread. 638 */ 639 assert(code == BUS_MCEERR_AR || code == BUS_MCEERR_AO); 640 641 if ((env->mcg_cap & MCG_SER_P) && addr) { 642 ram_addr = qemu_ram_addr_from_host(addr); 643 if (ram_addr != RAM_ADDR_INVALID && 644 kvm_physical_memory_addr_from_host(c->kvm_state, addr, &paddr)) { 645 kvm_hwpoison_page_add(ram_addr); 646 kvm_mce_inject(cpu, paddr, code); 647 648 /* 649 * Use different logging severity based on error type. 650 * If there is additional MCE reporting on the hypervisor, QEMU VA 651 * could be another source to identify the PA and MCE details. 652 */ 653 if (code == BUS_MCEERR_AR) { 654 error_report("Guest MCE Memory Error at QEMU addr %p and " 655 "GUEST addr 0x%" HWADDR_PRIx " of type %s injected", 656 addr, paddr, "BUS_MCEERR_AR"); 657 } else { 658 warn_report("Guest MCE Memory Error at QEMU addr %p and " 659 "GUEST addr 0x%" HWADDR_PRIx " of type %s injected", 660 addr, paddr, "BUS_MCEERR_AO"); 661 } 662 663 return; 664 } 665 666 if (code == BUS_MCEERR_AO) { 667 warn_report("Hardware memory error at addr %p of type %s " 668 "for memory used by QEMU itself instead of guest system!", 669 addr, "BUS_MCEERR_AO"); 670 } 671 } 672 673 if (code == BUS_MCEERR_AR) { 674 hardware_memory_error(addr); 675 } 676 677 /* Hope we are lucky for AO MCE, just notify a event */ 678 emit_hypervisor_memory_failure(MEMORY_FAILURE_ACTION_IGNORE, false); 679 } 680 681 static void kvm_queue_exception(CPUX86State *env, 682 int32_t exception_nr, 683 uint8_t exception_has_payload, 684 uint64_t exception_payload) 685 { 686 assert(env->exception_nr == -1); 687 assert(!env->exception_pending); 688 assert(!env->exception_injected); 689 assert(!env->exception_has_payload); 690 691 env->exception_nr = exception_nr; 692 693 if (has_exception_payload) { 694 env->exception_pending = 1; 695 696 env->exception_has_payload = exception_has_payload; 697 env->exception_payload = exception_payload; 698 } else { 699 env->exception_injected = 1; 700 701 if (exception_nr == EXCP01_DB) { 702 assert(exception_has_payload); 703 env->dr[6] = exception_payload; 704 } else if (exception_nr == EXCP0E_PAGE) { 705 assert(exception_has_payload); 706 env->cr[2] = exception_payload; 707 } else { 708 assert(!exception_has_payload); 709 } 710 } 711 } 712 713 static void cpu_update_state(void *opaque, bool running, RunState state) 714 { 715 CPUX86State *env = opaque; 716 717 if (running) { 718 env->tsc_valid = false; 719 } 720 } 721 722 unsigned long kvm_arch_vcpu_id(CPUState *cs) 723 { 724 X86CPU *cpu = X86_CPU(cs); 725 return cpu->apic_id; 726 } 727 728 #ifndef KVM_CPUID_SIGNATURE_NEXT 729 #define KVM_CPUID_SIGNATURE_NEXT 0x40000100 730 #endif 731 732 static bool hyperv_enabled(X86CPU *cpu) 733 { 734 return kvm_check_extension(kvm_state, KVM_CAP_HYPERV) > 0 && 735 ((cpu->hyperv_spinlock_attempts != HYPERV_SPINLOCK_NEVER_NOTIFY) || 736 cpu->hyperv_features || cpu->hyperv_passthrough); 737 } 738 739 /* 740 * Check whether target_freq is within conservative 741 * ntp correctable bounds (250ppm) of freq 742 */ 743 static inline bool freq_within_bounds(int freq, int target_freq) 744 { 745 int max_freq = freq + (freq * 250 / 1000000); 746 int min_freq = freq - (freq * 250 / 1000000); 747 748 if (target_freq >= min_freq && target_freq <= max_freq) { 749 return true; 750 } 751 752 return false; 753 } 754 755 static int kvm_arch_set_tsc_khz(CPUState *cs) 756 { 757 X86CPU *cpu = X86_CPU(cs); 758 CPUX86State *env = &cpu->env; 759 int r, cur_freq; 760 bool set_ioctl = false; 761 762 if (!env->tsc_khz) { 763 return 0; 764 } 765 766 cur_freq = kvm_check_extension(cs->kvm_state, KVM_CAP_GET_TSC_KHZ) ? 767 kvm_vcpu_ioctl(cs, KVM_GET_TSC_KHZ) : -ENOTSUP; 768 769 /* 770 * If TSC scaling is supported, attempt to set TSC frequency. 771 */ 772 if (kvm_check_extension(cs->kvm_state, KVM_CAP_TSC_CONTROL)) { 773 set_ioctl = true; 774 } 775 776 /* 777 * If desired TSC frequency is within bounds of NTP correction, 778 * attempt to set TSC frequency. 779 */ 780 if (cur_freq != -ENOTSUP && freq_within_bounds(cur_freq, env->tsc_khz)) { 781 set_ioctl = true; 782 } 783 784 r = set_ioctl ? 785 kvm_vcpu_ioctl(cs, KVM_SET_TSC_KHZ, env->tsc_khz) : 786 -ENOTSUP; 787 788 if (r < 0) { 789 /* When KVM_SET_TSC_KHZ fails, it's an error only if the current 790 * TSC frequency doesn't match the one we want. 791 */ 792 cur_freq = kvm_check_extension(cs->kvm_state, KVM_CAP_GET_TSC_KHZ) ? 793 kvm_vcpu_ioctl(cs, KVM_GET_TSC_KHZ) : 794 -ENOTSUP; 795 if (cur_freq <= 0 || cur_freq != env->tsc_khz) { 796 warn_report("TSC frequency mismatch between " 797 "VM (%" PRId64 " kHz) and host (%d kHz), " 798 "and TSC scaling unavailable", 799 env->tsc_khz, cur_freq); 800 return r; 801 } 802 } 803 804 return 0; 805 } 806 807 static bool tsc_is_stable_and_known(CPUX86State *env) 808 { 809 if (!env->tsc_khz) { 810 return false; 811 } 812 return (env->features[FEAT_8000_0007_EDX] & CPUID_APM_INVTSC) 813 || env->user_tsc_khz; 814 } 815 816 #define DEFAULT_EVMCS_VERSION ((1 << 8) | 1) 817 818 static struct { 819 const char *desc; 820 struct { 821 uint32_t func; 822 int reg; 823 uint32_t bits; 824 } flags[2]; 825 uint64_t dependencies; 826 } kvm_hyperv_properties[] = { 827 [HYPERV_FEAT_RELAXED] = { 828 .desc = "relaxed timing (hv-relaxed)", 829 .flags = { 830 {.func = HV_CPUID_ENLIGHTMENT_INFO, .reg = R_EAX, 831 .bits = HV_RELAXED_TIMING_RECOMMENDED} 832 } 833 }, 834 [HYPERV_FEAT_VAPIC] = { 835 .desc = "virtual APIC (hv-vapic)", 836 .flags = { 837 {.func = HV_CPUID_FEATURES, .reg = R_EAX, 838 .bits = HV_APIC_ACCESS_AVAILABLE} 839 } 840 }, 841 [HYPERV_FEAT_TIME] = { 842 .desc = "clocksources (hv-time)", 843 .flags = { 844 {.func = HV_CPUID_FEATURES, .reg = R_EAX, 845 .bits = HV_TIME_REF_COUNT_AVAILABLE | HV_REFERENCE_TSC_AVAILABLE} 846 } 847 }, 848 [HYPERV_FEAT_CRASH] = { 849 .desc = "crash MSRs (hv-crash)", 850 .flags = { 851 {.func = HV_CPUID_FEATURES, .reg = R_EDX, 852 .bits = HV_GUEST_CRASH_MSR_AVAILABLE} 853 } 854 }, 855 [HYPERV_FEAT_RESET] = { 856 .desc = "reset MSR (hv-reset)", 857 .flags = { 858 {.func = HV_CPUID_FEATURES, .reg = R_EAX, 859 .bits = HV_RESET_AVAILABLE} 860 } 861 }, 862 [HYPERV_FEAT_VPINDEX] = { 863 .desc = "VP_INDEX MSR (hv-vpindex)", 864 .flags = { 865 {.func = HV_CPUID_FEATURES, .reg = R_EAX, 866 .bits = HV_VP_INDEX_AVAILABLE} 867 } 868 }, 869 [HYPERV_FEAT_RUNTIME] = { 870 .desc = "VP_RUNTIME MSR (hv-runtime)", 871 .flags = { 872 {.func = HV_CPUID_FEATURES, .reg = R_EAX, 873 .bits = HV_VP_RUNTIME_AVAILABLE} 874 } 875 }, 876 [HYPERV_FEAT_SYNIC] = { 877 .desc = "synthetic interrupt controller (hv-synic)", 878 .flags = { 879 {.func = HV_CPUID_FEATURES, .reg = R_EAX, 880 .bits = HV_SYNIC_AVAILABLE} 881 } 882 }, 883 [HYPERV_FEAT_STIMER] = { 884 .desc = "synthetic timers (hv-stimer)", 885 .flags = { 886 {.func = HV_CPUID_FEATURES, .reg = R_EAX, 887 .bits = HV_SYNTIMERS_AVAILABLE} 888 }, 889 .dependencies = BIT(HYPERV_FEAT_SYNIC) | BIT(HYPERV_FEAT_TIME) 890 }, 891 [HYPERV_FEAT_FREQUENCIES] = { 892 .desc = "frequency MSRs (hv-frequencies)", 893 .flags = { 894 {.func = HV_CPUID_FEATURES, .reg = R_EAX, 895 .bits = HV_ACCESS_FREQUENCY_MSRS}, 896 {.func = HV_CPUID_FEATURES, .reg = R_EDX, 897 .bits = HV_FREQUENCY_MSRS_AVAILABLE} 898 } 899 }, 900 [HYPERV_FEAT_REENLIGHTENMENT] = { 901 .desc = "reenlightenment MSRs (hv-reenlightenment)", 902 .flags = { 903 {.func = HV_CPUID_FEATURES, .reg = R_EAX, 904 .bits = HV_ACCESS_REENLIGHTENMENTS_CONTROL} 905 } 906 }, 907 [HYPERV_FEAT_TLBFLUSH] = { 908 .desc = "paravirtualized TLB flush (hv-tlbflush)", 909 .flags = { 910 {.func = HV_CPUID_ENLIGHTMENT_INFO, .reg = R_EAX, 911 .bits = HV_REMOTE_TLB_FLUSH_RECOMMENDED | 912 HV_EX_PROCESSOR_MASKS_RECOMMENDED} 913 }, 914 .dependencies = BIT(HYPERV_FEAT_VPINDEX) 915 }, 916 [HYPERV_FEAT_EVMCS] = { 917 .desc = "enlightened VMCS (hv-evmcs)", 918 .flags = { 919 {.func = HV_CPUID_ENLIGHTMENT_INFO, .reg = R_EAX, 920 .bits = HV_ENLIGHTENED_VMCS_RECOMMENDED} 921 }, 922 .dependencies = BIT(HYPERV_FEAT_VAPIC) 923 }, 924 [HYPERV_FEAT_IPI] = { 925 .desc = "paravirtualized IPI (hv-ipi)", 926 .flags = { 927 {.func = HV_CPUID_ENLIGHTMENT_INFO, .reg = R_EAX, 928 .bits = HV_CLUSTER_IPI_RECOMMENDED | 929 HV_EX_PROCESSOR_MASKS_RECOMMENDED} 930 }, 931 .dependencies = BIT(HYPERV_FEAT_VPINDEX) 932 }, 933 [HYPERV_FEAT_STIMER_DIRECT] = { 934 .desc = "direct mode synthetic timers (hv-stimer-direct)", 935 .flags = { 936 {.func = HV_CPUID_FEATURES, .reg = R_EDX, 937 .bits = HV_STIMER_DIRECT_MODE_AVAILABLE} 938 }, 939 .dependencies = BIT(HYPERV_FEAT_STIMER) 940 }, 941 [HYPERV_FEAT_AVIC] = { 942 .desc = "AVIC/APICv support (hv-avic/hv-apicv)", 943 .flags = { 944 {.func = HV_CPUID_ENLIGHTMENT_INFO, .reg = R_EAX, 945 .bits = HV_DEPRECATING_AEOI_RECOMMENDED} 946 } 947 }, 948 #ifdef CONFIG_SYNDBG 949 [HYPERV_FEAT_SYNDBG] = { 950 .desc = "Enable synthetic kernel debugger channel (hv-syndbg)", 951 .flags = { 952 {.func = HV_CPUID_FEATURES, .reg = R_EDX, 953 .bits = HV_FEATURE_DEBUG_MSRS_AVAILABLE} 954 }, 955 .dependencies = BIT(HYPERV_FEAT_SYNIC) | BIT(HYPERV_FEAT_RELAXED) 956 }, 957 #endif 958 [HYPERV_FEAT_MSR_BITMAP] = { 959 .desc = "enlightened MSR-Bitmap (hv-emsr-bitmap)", 960 .flags = { 961 {.func = HV_CPUID_NESTED_FEATURES, .reg = R_EAX, 962 .bits = HV_NESTED_MSR_BITMAP} 963 } 964 }, 965 [HYPERV_FEAT_XMM_INPUT] = { 966 .desc = "XMM fast hypercall input (hv-xmm-input)", 967 .flags = { 968 {.func = HV_CPUID_FEATURES, .reg = R_EDX, 969 .bits = HV_HYPERCALL_XMM_INPUT_AVAILABLE} 970 } 971 }, 972 [HYPERV_FEAT_TLBFLUSH_EXT] = { 973 .desc = "Extended gva ranges for TLB flush hypercalls (hv-tlbflush-ext)", 974 .flags = { 975 {.func = HV_CPUID_FEATURES, .reg = R_EDX, 976 .bits = HV_EXT_GVA_RANGES_FLUSH_AVAILABLE} 977 }, 978 .dependencies = BIT(HYPERV_FEAT_TLBFLUSH) 979 }, 980 [HYPERV_FEAT_TLBFLUSH_DIRECT] = { 981 .desc = "direct TLB flush (hv-tlbflush-direct)", 982 .flags = { 983 {.func = HV_CPUID_NESTED_FEATURES, .reg = R_EAX, 984 .bits = HV_NESTED_DIRECT_FLUSH} 985 }, 986 .dependencies = BIT(HYPERV_FEAT_VAPIC) 987 }, 988 }; 989 990 static struct kvm_cpuid2 *try_get_hv_cpuid(CPUState *cs, int max, 991 bool do_sys_ioctl) 992 { 993 struct kvm_cpuid2 *cpuid; 994 int r, size; 995 996 size = sizeof(*cpuid) + max * sizeof(*cpuid->entries); 997 cpuid = g_malloc0(size); 998 cpuid->nent = max; 999 1000 if (do_sys_ioctl) { 1001 r = kvm_ioctl(kvm_state, KVM_GET_SUPPORTED_HV_CPUID, cpuid); 1002 } else { 1003 r = kvm_vcpu_ioctl(cs, KVM_GET_SUPPORTED_HV_CPUID, cpuid); 1004 } 1005 if (r == 0 && cpuid->nent >= max) { 1006 r = -E2BIG; 1007 } 1008 if (r < 0) { 1009 if (r == -E2BIG) { 1010 g_free(cpuid); 1011 return NULL; 1012 } else { 1013 fprintf(stderr, "KVM_GET_SUPPORTED_HV_CPUID failed: %s\n", 1014 strerror(-r)); 1015 exit(1); 1016 } 1017 } 1018 return cpuid; 1019 } 1020 1021 /* 1022 * Run KVM_GET_SUPPORTED_HV_CPUID ioctl(), allocating a buffer large enough 1023 * for all entries. 1024 */ 1025 static struct kvm_cpuid2 *get_supported_hv_cpuid(CPUState *cs) 1026 { 1027 struct kvm_cpuid2 *cpuid; 1028 /* 0x40000000..0x40000005, 0x4000000A, 0x40000080..0x40000082 leaves */ 1029 int max = 11; 1030 int i; 1031 bool do_sys_ioctl; 1032 1033 do_sys_ioctl = 1034 kvm_check_extension(kvm_state, KVM_CAP_SYS_HYPERV_CPUID) > 0; 1035 1036 /* 1037 * Non-empty KVM context is needed when KVM_CAP_SYS_HYPERV_CPUID is 1038 * unsupported, kvm_hyperv_expand_features() checks for that. 1039 */ 1040 assert(do_sys_ioctl || cs->kvm_state); 1041 1042 /* 1043 * When the buffer is too small, KVM_GET_SUPPORTED_HV_CPUID fails with 1044 * -E2BIG, however, it doesn't report back the right size. Keep increasing 1045 * it and re-trying until we succeed. 1046 */ 1047 while ((cpuid = try_get_hv_cpuid(cs, max, do_sys_ioctl)) == NULL) { 1048 max++; 1049 } 1050 1051 /* 1052 * KVM_GET_SUPPORTED_HV_CPUID does not set EVMCS CPUID bit before 1053 * KVM_CAP_HYPERV_ENLIGHTENED_VMCS is enabled but we want to get the 1054 * information early, just check for the capability and set the bit 1055 * manually. 1056 */ 1057 if (!do_sys_ioctl && kvm_check_extension(cs->kvm_state, 1058 KVM_CAP_HYPERV_ENLIGHTENED_VMCS) > 0) { 1059 for (i = 0; i < cpuid->nent; i++) { 1060 if (cpuid->entries[i].function == HV_CPUID_ENLIGHTMENT_INFO) { 1061 cpuid->entries[i].eax |= HV_ENLIGHTENED_VMCS_RECOMMENDED; 1062 } 1063 } 1064 } 1065 1066 return cpuid; 1067 } 1068 1069 /* 1070 * When KVM_GET_SUPPORTED_HV_CPUID is not supported we fill CPUID feature 1071 * leaves from KVM_CAP_HYPERV* and present MSRs data. 1072 */ 1073 static struct kvm_cpuid2 *get_supported_hv_cpuid_legacy(CPUState *cs) 1074 { 1075 X86CPU *cpu = X86_CPU(cs); 1076 struct kvm_cpuid2 *cpuid; 1077 struct kvm_cpuid_entry2 *entry_feat, *entry_recomm; 1078 1079 /* HV_CPUID_FEATURES, HV_CPUID_ENLIGHTMENT_INFO */ 1080 cpuid = g_malloc0(sizeof(*cpuid) + 2 * sizeof(*cpuid->entries)); 1081 cpuid->nent = 2; 1082 1083 /* HV_CPUID_VENDOR_AND_MAX_FUNCTIONS */ 1084 entry_feat = &cpuid->entries[0]; 1085 entry_feat->function = HV_CPUID_FEATURES; 1086 1087 entry_recomm = &cpuid->entries[1]; 1088 entry_recomm->function = HV_CPUID_ENLIGHTMENT_INFO; 1089 entry_recomm->ebx = cpu->hyperv_spinlock_attempts; 1090 1091 if (kvm_check_extension(cs->kvm_state, KVM_CAP_HYPERV) > 0) { 1092 entry_feat->eax |= HV_HYPERCALL_AVAILABLE; 1093 entry_feat->eax |= HV_APIC_ACCESS_AVAILABLE; 1094 entry_feat->edx |= HV_CPU_DYNAMIC_PARTITIONING_AVAILABLE; 1095 entry_recomm->eax |= HV_RELAXED_TIMING_RECOMMENDED; 1096 entry_recomm->eax |= HV_APIC_ACCESS_RECOMMENDED; 1097 } 1098 1099 if (kvm_check_extension(cs->kvm_state, KVM_CAP_HYPERV_TIME) > 0) { 1100 entry_feat->eax |= HV_TIME_REF_COUNT_AVAILABLE; 1101 entry_feat->eax |= HV_REFERENCE_TSC_AVAILABLE; 1102 } 1103 1104 if (has_msr_hv_frequencies) { 1105 entry_feat->eax |= HV_ACCESS_FREQUENCY_MSRS; 1106 entry_feat->edx |= HV_FREQUENCY_MSRS_AVAILABLE; 1107 } 1108 1109 if (has_msr_hv_crash) { 1110 entry_feat->edx |= HV_GUEST_CRASH_MSR_AVAILABLE; 1111 } 1112 1113 if (has_msr_hv_reenlightenment) { 1114 entry_feat->eax |= HV_ACCESS_REENLIGHTENMENTS_CONTROL; 1115 } 1116 1117 if (has_msr_hv_reset) { 1118 entry_feat->eax |= HV_RESET_AVAILABLE; 1119 } 1120 1121 if (has_msr_hv_vpindex) { 1122 entry_feat->eax |= HV_VP_INDEX_AVAILABLE; 1123 } 1124 1125 if (has_msr_hv_runtime) { 1126 entry_feat->eax |= HV_VP_RUNTIME_AVAILABLE; 1127 } 1128 1129 if (has_msr_hv_synic) { 1130 unsigned int cap = cpu->hyperv_synic_kvm_only ? 1131 KVM_CAP_HYPERV_SYNIC : KVM_CAP_HYPERV_SYNIC2; 1132 1133 if (kvm_check_extension(cs->kvm_state, cap) > 0) { 1134 entry_feat->eax |= HV_SYNIC_AVAILABLE; 1135 } 1136 } 1137 1138 if (has_msr_hv_stimer) { 1139 entry_feat->eax |= HV_SYNTIMERS_AVAILABLE; 1140 } 1141 1142 if (has_msr_hv_syndbg_options) { 1143 entry_feat->edx |= HV_GUEST_DEBUGGING_AVAILABLE; 1144 entry_feat->edx |= HV_FEATURE_DEBUG_MSRS_AVAILABLE; 1145 entry_feat->ebx |= HV_PARTITION_DEBUGGING_ALLOWED; 1146 } 1147 1148 if (kvm_check_extension(cs->kvm_state, 1149 KVM_CAP_HYPERV_TLBFLUSH) > 0) { 1150 entry_recomm->eax |= HV_REMOTE_TLB_FLUSH_RECOMMENDED; 1151 entry_recomm->eax |= HV_EX_PROCESSOR_MASKS_RECOMMENDED; 1152 } 1153 1154 if (kvm_check_extension(cs->kvm_state, 1155 KVM_CAP_HYPERV_ENLIGHTENED_VMCS) > 0) { 1156 entry_recomm->eax |= HV_ENLIGHTENED_VMCS_RECOMMENDED; 1157 } 1158 1159 if (kvm_check_extension(cs->kvm_state, 1160 KVM_CAP_HYPERV_SEND_IPI) > 0) { 1161 entry_recomm->eax |= HV_CLUSTER_IPI_RECOMMENDED; 1162 entry_recomm->eax |= HV_EX_PROCESSOR_MASKS_RECOMMENDED; 1163 } 1164 1165 return cpuid; 1166 } 1167 1168 static uint32_t hv_cpuid_get_host(CPUState *cs, uint32_t func, int reg) 1169 { 1170 struct kvm_cpuid_entry2 *entry; 1171 struct kvm_cpuid2 *cpuid; 1172 1173 if (hv_cpuid_cache) { 1174 cpuid = hv_cpuid_cache; 1175 } else { 1176 if (kvm_check_extension(kvm_state, KVM_CAP_HYPERV_CPUID) > 0) { 1177 cpuid = get_supported_hv_cpuid(cs); 1178 } else { 1179 /* 1180 * 'cs->kvm_state' may be NULL when Hyper-V features are expanded 1181 * before KVM context is created but this is only done when 1182 * KVM_CAP_SYS_HYPERV_CPUID is supported and it implies 1183 * KVM_CAP_HYPERV_CPUID. 1184 */ 1185 assert(cs->kvm_state); 1186 1187 cpuid = get_supported_hv_cpuid_legacy(cs); 1188 } 1189 hv_cpuid_cache = cpuid; 1190 } 1191 1192 if (!cpuid) { 1193 return 0; 1194 } 1195 1196 entry = cpuid_find_entry(cpuid, func, 0); 1197 if (!entry) { 1198 return 0; 1199 } 1200 1201 return cpuid_entry_get_reg(entry, reg); 1202 } 1203 1204 static bool hyperv_feature_supported(CPUState *cs, int feature) 1205 { 1206 uint32_t func, bits; 1207 int i, reg; 1208 1209 for (i = 0; i < ARRAY_SIZE(kvm_hyperv_properties[feature].flags); i++) { 1210 1211 func = kvm_hyperv_properties[feature].flags[i].func; 1212 reg = kvm_hyperv_properties[feature].flags[i].reg; 1213 bits = kvm_hyperv_properties[feature].flags[i].bits; 1214 1215 if (!func) { 1216 continue; 1217 } 1218 1219 if ((hv_cpuid_get_host(cs, func, reg) & bits) != bits) { 1220 return false; 1221 } 1222 } 1223 1224 return true; 1225 } 1226 1227 /* Checks that all feature dependencies are enabled */ 1228 static bool hv_feature_check_deps(X86CPU *cpu, int feature, Error **errp) 1229 { 1230 uint64_t deps; 1231 int dep_feat; 1232 1233 deps = kvm_hyperv_properties[feature].dependencies; 1234 while (deps) { 1235 dep_feat = ctz64(deps); 1236 if (!(hyperv_feat_enabled(cpu, dep_feat))) { 1237 error_setg(errp, "Hyper-V %s requires Hyper-V %s", 1238 kvm_hyperv_properties[feature].desc, 1239 kvm_hyperv_properties[dep_feat].desc); 1240 return false; 1241 } 1242 deps &= ~(1ull << dep_feat); 1243 } 1244 1245 return true; 1246 } 1247 1248 static uint32_t hv_build_cpuid_leaf(CPUState *cs, uint32_t func, int reg) 1249 { 1250 X86CPU *cpu = X86_CPU(cs); 1251 uint32_t r = 0; 1252 int i, j; 1253 1254 for (i = 0; i < ARRAY_SIZE(kvm_hyperv_properties); i++) { 1255 if (!hyperv_feat_enabled(cpu, i)) { 1256 continue; 1257 } 1258 1259 for (j = 0; j < ARRAY_SIZE(kvm_hyperv_properties[i].flags); j++) { 1260 if (kvm_hyperv_properties[i].flags[j].func != func) { 1261 continue; 1262 } 1263 if (kvm_hyperv_properties[i].flags[j].reg != reg) { 1264 continue; 1265 } 1266 1267 r |= kvm_hyperv_properties[i].flags[j].bits; 1268 } 1269 } 1270 1271 /* HV_CPUID_NESTED_FEATURES.EAX also encodes the supported eVMCS range */ 1272 if (func == HV_CPUID_NESTED_FEATURES && reg == R_EAX) { 1273 if (hyperv_feat_enabled(cpu, HYPERV_FEAT_EVMCS)) { 1274 r |= DEFAULT_EVMCS_VERSION; 1275 } 1276 } 1277 1278 return r; 1279 } 1280 1281 /* 1282 * Expand Hyper-V CPU features. In partucular, check that all the requested 1283 * features are supported by the host and the sanity of the configuration 1284 * (that all the required dependencies are included). Also, this takes care 1285 * of 'hv_passthrough' mode and fills the environment with all supported 1286 * Hyper-V features. 1287 */ 1288 bool kvm_hyperv_expand_features(X86CPU *cpu, Error **errp) 1289 { 1290 CPUState *cs = CPU(cpu); 1291 Error *local_err = NULL; 1292 int feat; 1293 1294 if (!hyperv_enabled(cpu)) 1295 return true; 1296 1297 /* 1298 * When kvm_hyperv_expand_features is called at CPU feature expansion 1299 * time per-CPU kvm_state is not available yet so we can only proceed 1300 * when KVM_CAP_SYS_HYPERV_CPUID is supported. 1301 */ 1302 if (!cs->kvm_state && 1303 !kvm_check_extension(kvm_state, KVM_CAP_SYS_HYPERV_CPUID)) 1304 return true; 1305 1306 if (cpu->hyperv_passthrough) { 1307 cpu->hyperv_vendor_id[0] = 1308 hv_cpuid_get_host(cs, HV_CPUID_VENDOR_AND_MAX_FUNCTIONS, R_EBX); 1309 cpu->hyperv_vendor_id[1] = 1310 hv_cpuid_get_host(cs, HV_CPUID_VENDOR_AND_MAX_FUNCTIONS, R_ECX); 1311 cpu->hyperv_vendor_id[2] = 1312 hv_cpuid_get_host(cs, HV_CPUID_VENDOR_AND_MAX_FUNCTIONS, R_EDX); 1313 cpu->hyperv_vendor = g_realloc(cpu->hyperv_vendor, 1314 sizeof(cpu->hyperv_vendor_id) + 1); 1315 memcpy(cpu->hyperv_vendor, cpu->hyperv_vendor_id, 1316 sizeof(cpu->hyperv_vendor_id)); 1317 cpu->hyperv_vendor[sizeof(cpu->hyperv_vendor_id)] = 0; 1318 1319 cpu->hyperv_interface_id[0] = 1320 hv_cpuid_get_host(cs, HV_CPUID_INTERFACE, R_EAX); 1321 cpu->hyperv_interface_id[1] = 1322 hv_cpuid_get_host(cs, HV_CPUID_INTERFACE, R_EBX); 1323 cpu->hyperv_interface_id[2] = 1324 hv_cpuid_get_host(cs, HV_CPUID_INTERFACE, R_ECX); 1325 cpu->hyperv_interface_id[3] = 1326 hv_cpuid_get_host(cs, HV_CPUID_INTERFACE, R_EDX); 1327 1328 cpu->hyperv_ver_id_build = 1329 hv_cpuid_get_host(cs, HV_CPUID_VERSION, R_EAX); 1330 cpu->hyperv_ver_id_major = 1331 hv_cpuid_get_host(cs, HV_CPUID_VERSION, R_EBX) >> 16; 1332 cpu->hyperv_ver_id_minor = 1333 hv_cpuid_get_host(cs, HV_CPUID_VERSION, R_EBX) & 0xffff; 1334 cpu->hyperv_ver_id_sp = 1335 hv_cpuid_get_host(cs, HV_CPUID_VERSION, R_ECX); 1336 cpu->hyperv_ver_id_sb = 1337 hv_cpuid_get_host(cs, HV_CPUID_VERSION, R_EDX) >> 24; 1338 cpu->hyperv_ver_id_sn = 1339 hv_cpuid_get_host(cs, HV_CPUID_VERSION, R_EDX) & 0xffffff; 1340 1341 cpu->hv_max_vps = hv_cpuid_get_host(cs, HV_CPUID_IMPLEMENT_LIMITS, 1342 R_EAX); 1343 cpu->hyperv_limits[0] = 1344 hv_cpuid_get_host(cs, HV_CPUID_IMPLEMENT_LIMITS, R_EBX); 1345 cpu->hyperv_limits[1] = 1346 hv_cpuid_get_host(cs, HV_CPUID_IMPLEMENT_LIMITS, R_ECX); 1347 cpu->hyperv_limits[2] = 1348 hv_cpuid_get_host(cs, HV_CPUID_IMPLEMENT_LIMITS, R_EDX); 1349 1350 cpu->hyperv_spinlock_attempts = 1351 hv_cpuid_get_host(cs, HV_CPUID_ENLIGHTMENT_INFO, R_EBX); 1352 1353 /* 1354 * Mark feature as enabled in 'cpu->hyperv_features' as 1355 * hv_build_cpuid_leaf() uses this info to build guest CPUIDs. 1356 */ 1357 for (feat = 0; feat < ARRAY_SIZE(kvm_hyperv_properties); feat++) { 1358 if (hyperv_feature_supported(cs, feat)) { 1359 cpu->hyperv_features |= BIT(feat); 1360 } 1361 } 1362 } else { 1363 /* Check features availability and dependencies */ 1364 for (feat = 0; feat < ARRAY_SIZE(kvm_hyperv_properties); feat++) { 1365 /* If the feature was not requested skip it. */ 1366 if (!hyperv_feat_enabled(cpu, feat)) { 1367 continue; 1368 } 1369 1370 /* Check if the feature is supported by KVM */ 1371 if (!hyperv_feature_supported(cs, feat)) { 1372 error_setg(errp, "Hyper-V %s is not supported by kernel", 1373 kvm_hyperv_properties[feat].desc); 1374 return false; 1375 } 1376 1377 /* Check dependencies */ 1378 if (!hv_feature_check_deps(cpu, feat, &local_err)) { 1379 error_propagate(errp, local_err); 1380 return false; 1381 } 1382 } 1383 } 1384 1385 /* Additional dependencies not covered by kvm_hyperv_properties[] */ 1386 if (hyperv_feat_enabled(cpu, HYPERV_FEAT_SYNIC) && 1387 !cpu->hyperv_synic_kvm_only && 1388 !hyperv_feat_enabled(cpu, HYPERV_FEAT_VPINDEX)) { 1389 error_setg(errp, "Hyper-V %s requires Hyper-V %s", 1390 kvm_hyperv_properties[HYPERV_FEAT_SYNIC].desc, 1391 kvm_hyperv_properties[HYPERV_FEAT_VPINDEX].desc); 1392 return false; 1393 } 1394 1395 return true; 1396 } 1397 1398 /* 1399 * Fill in Hyper-V CPUIDs. Returns the number of entries filled in cpuid_ent. 1400 */ 1401 static int hyperv_fill_cpuids(CPUState *cs, 1402 struct kvm_cpuid_entry2 *cpuid_ent) 1403 { 1404 X86CPU *cpu = X86_CPU(cs); 1405 struct kvm_cpuid_entry2 *c; 1406 uint32_t signature[3]; 1407 uint32_t cpuid_i = 0, max_cpuid_leaf = 0; 1408 uint32_t nested_eax = 1409 hv_build_cpuid_leaf(cs, HV_CPUID_NESTED_FEATURES, R_EAX); 1410 1411 max_cpuid_leaf = nested_eax ? HV_CPUID_NESTED_FEATURES : 1412 HV_CPUID_IMPLEMENT_LIMITS; 1413 1414 if (hyperv_feat_enabled(cpu, HYPERV_FEAT_SYNDBG)) { 1415 max_cpuid_leaf = 1416 MAX(max_cpuid_leaf, HV_CPUID_SYNDBG_PLATFORM_CAPABILITIES); 1417 } 1418 1419 c = &cpuid_ent[cpuid_i++]; 1420 c->function = HV_CPUID_VENDOR_AND_MAX_FUNCTIONS; 1421 c->eax = max_cpuid_leaf; 1422 c->ebx = cpu->hyperv_vendor_id[0]; 1423 c->ecx = cpu->hyperv_vendor_id[1]; 1424 c->edx = cpu->hyperv_vendor_id[2]; 1425 1426 c = &cpuid_ent[cpuid_i++]; 1427 c->function = HV_CPUID_INTERFACE; 1428 c->eax = cpu->hyperv_interface_id[0]; 1429 c->ebx = cpu->hyperv_interface_id[1]; 1430 c->ecx = cpu->hyperv_interface_id[2]; 1431 c->edx = cpu->hyperv_interface_id[3]; 1432 1433 c = &cpuid_ent[cpuid_i++]; 1434 c->function = HV_CPUID_VERSION; 1435 c->eax = cpu->hyperv_ver_id_build; 1436 c->ebx = (uint32_t)cpu->hyperv_ver_id_major << 16 | 1437 cpu->hyperv_ver_id_minor; 1438 c->ecx = cpu->hyperv_ver_id_sp; 1439 c->edx = (uint32_t)cpu->hyperv_ver_id_sb << 24 | 1440 (cpu->hyperv_ver_id_sn & 0xffffff); 1441 1442 c = &cpuid_ent[cpuid_i++]; 1443 c->function = HV_CPUID_FEATURES; 1444 c->eax = hv_build_cpuid_leaf(cs, HV_CPUID_FEATURES, R_EAX); 1445 c->ebx = hv_build_cpuid_leaf(cs, HV_CPUID_FEATURES, R_EBX); 1446 c->edx = hv_build_cpuid_leaf(cs, HV_CPUID_FEATURES, R_EDX); 1447 1448 /* Unconditionally required with any Hyper-V enlightenment */ 1449 c->eax |= HV_HYPERCALL_AVAILABLE; 1450 1451 /* SynIC and Vmbus devices require messages/signals hypercalls */ 1452 if (hyperv_feat_enabled(cpu, HYPERV_FEAT_SYNIC) && 1453 !cpu->hyperv_synic_kvm_only) { 1454 c->ebx |= HV_POST_MESSAGES | HV_SIGNAL_EVENTS; 1455 } 1456 1457 1458 /* Not exposed by KVM but needed to make CPU hotplug in Windows work */ 1459 c->edx |= HV_CPU_DYNAMIC_PARTITIONING_AVAILABLE; 1460 1461 c = &cpuid_ent[cpuid_i++]; 1462 c->function = HV_CPUID_ENLIGHTMENT_INFO; 1463 c->eax = hv_build_cpuid_leaf(cs, HV_CPUID_ENLIGHTMENT_INFO, R_EAX); 1464 c->ebx = cpu->hyperv_spinlock_attempts; 1465 1466 if (hyperv_feat_enabled(cpu, HYPERV_FEAT_VAPIC) && 1467 !hyperv_feat_enabled(cpu, HYPERV_FEAT_AVIC)) { 1468 c->eax |= HV_APIC_ACCESS_RECOMMENDED; 1469 } 1470 1471 if (cpu->hyperv_no_nonarch_cs == ON_OFF_AUTO_ON) { 1472 c->eax |= HV_NO_NONARCH_CORESHARING; 1473 } else if (cpu->hyperv_no_nonarch_cs == ON_OFF_AUTO_AUTO) { 1474 c->eax |= hv_cpuid_get_host(cs, HV_CPUID_ENLIGHTMENT_INFO, R_EAX) & 1475 HV_NO_NONARCH_CORESHARING; 1476 } 1477 1478 c = &cpuid_ent[cpuid_i++]; 1479 c->function = HV_CPUID_IMPLEMENT_LIMITS; 1480 c->eax = cpu->hv_max_vps; 1481 c->ebx = cpu->hyperv_limits[0]; 1482 c->ecx = cpu->hyperv_limits[1]; 1483 c->edx = cpu->hyperv_limits[2]; 1484 1485 if (nested_eax) { 1486 uint32_t function; 1487 1488 /* Create zeroed 0x40000006..0x40000009 leaves */ 1489 for (function = HV_CPUID_IMPLEMENT_LIMITS + 1; 1490 function < HV_CPUID_NESTED_FEATURES; function++) { 1491 c = &cpuid_ent[cpuid_i++]; 1492 c->function = function; 1493 } 1494 1495 c = &cpuid_ent[cpuid_i++]; 1496 c->function = HV_CPUID_NESTED_FEATURES; 1497 c->eax = nested_eax; 1498 } 1499 1500 if (hyperv_feat_enabled(cpu, HYPERV_FEAT_SYNDBG)) { 1501 c = &cpuid_ent[cpuid_i++]; 1502 c->function = HV_CPUID_SYNDBG_VENDOR_AND_MAX_FUNCTIONS; 1503 c->eax = hyperv_feat_enabled(cpu, HYPERV_FEAT_EVMCS) ? 1504 HV_CPUID_NESTED_FEATURES : HV_CPUID_IMPLEMENT_LIMITS; 1505 memcpy(signature, "Microsoft VS", 12); 1506 c->eax = 0; 1507 c->ebx = signature[0]; 1508 c->ecx = signature[1]; 1509 c->edx = signature[2]; 1510 1511 c = &cpuid_ent[cpuid_i++]; 1512 c->function = HV_CPUID_SYNDBG_INTERFACE; 1513 memcpy(signature, "VS#1\0\0\0\0\0\0\0\0", 12); 1514 c->eax = signature[0]; 1515 c->ebx = 0; 1516 c->ecx = 0; 1517 c->edx = 0; 1518 1519 c = &cpuid_ent[cpuid_i++]; 1520 c->function = HV_CPUID_SYNDBG_PLATFORM_CAPABILITIES; 1521 c->eax = HV_SYNDBG_CAP_ALLOW_KERNEL_DEBUGGING; 1522 c->ebx = 0; 1523 c->ecx = 0; 1524 c->edx = 0; 1525 } 1526 1527 return cpuid_i; 1528 } 1529 1530 static Error *hv_passthrough_mig_blocker; 1531 static Error *hv_no_nonarch_cs_mig_blocker; 1532 1533 /* Checks that the exposed eVMCS version range is supported by KVM */ 1534 static bool evmcs_version_supported(uint16_t evmcs_version, 1535 uint16_t supported_evmcs_version) 1536 { 1537 uint8_t min_version = evmcs_version & 0xff; 1538 uint8_t max_version = evmcs_version >> 8; 1539 uint8_t min_supported_version = supported_evmcs_version & 0xff; 1540 uint8_t max_supported_version = supported_evmcs_version >> 8; 1541 1542 return (min_version >= min_supported_version) && 1543 (max_version <= max_supported_version); 1544 } 1545 1546 static int hyperv_init_vcpu(X86CPU *cpu) 1547 { 1548 CPUState *cs = CPU(cpu); 1549 Error *local_err = NULL; 1550 int ret; 1551 1552 if (cpu->hyperv_passthrough && hv_passthrough_mig_blocker == NULL) { 1553 error_setg(&hv_passthrough_mig_blocker, 1554 "'hv-passthrough' CPU flag prevents migration, use explicit" 1555 " set of hv-* flags instead"); 1556 ret = migrate_add_blocker(&hv_passthrough_mig_blocker, &local_err); 1557 if (ret < 0) { 1558 error_report_err(local_err); 1559 return ret; 1560 } 1561 } 1562 1563 if (cpu->hyperv_no_nonarch_cs == ON_OFF_AUTO_AUTO && 1564 hv_no_nonarch_cs_mig_blocker == NULL) { 1565 error_setg(&hv_no_nonarch_cs_mig_blocker, 1566 "'hv-no-nonarch-coresharing=auto' CPU flag prevents migration" 1567 " use explicit 'hv-no-nonarch-coresharing=on' instead (but" 1568 " make sure SMT is disabled and/or that vCPUs are properly" 1569 " pinned)"); 1570 ret = migrate_add_blocker(&hv_no_nonarch_cs_mig_blocker, &local_err); 1571 if (ret < 0) { 1572 error_report_err(local_err); 1573 return ret; 1574 } 1575 } 1576 1577 if (hyperv_feat_enabled(cpu, HYPERV_FEAT_VPINDEX) && !hv_vpindex_settable) { 1578 /* 1579 * the kernel doesn't support setting vp_index; assert that its value 1580 * is in sync 1581 */ 1582 uint64_t value; 1583 1584 ret = kvm_get_one_msr(cpu, HV_X64_MSR_VP_INDEX, &value); 1585 if (ret < 0) { 1586 return ret; 1587 } 1588 1589 if (value != hyperv_vp_index(CPU(cpu))) { 1590 error_report("kernel's vp_index != QEMU's vp_index"); 1591 return -ENXIO; 1592 } 1593 } 1594 1595 if (hyperv_feat_enabled(cpu, HYPERV_FEAT_SYNIC)) { 1596 uint32_t synic_cap = cpu->hyperv_synic_kvm_only ? 1597 KVM_CAP_HYPERV_SYNIC : KVM_CAP_HYPERV_SYNIC2; 1598 ret = kvm_vcpu_enable_cap(cs, synic_cap, 0); 1599 if (ret < 0) { 1600 error_report("failed to turn on HyperV SynIC in KVM: %s", 1601 strerror(-ret)); 1602 return ret; 1603 } 1604 1605 if (!cpu->hyperv_synic_kvm_only) { 1606 ret = hyperv_x86_synic_add(cpu); 1607 if (ret < 0) { 1608 error_report("failed to create HyperV SynIC: %s", 1609 strerror(-ret)); 1610 return ret; 1611 } 1612 } 1613 } 1614 1615 if (hyperv_feat_enabled(cpu, HYPERV_FEAT_EVMCS)) { 1616 uint16_t evmcs_version = DEFAULT_EVMCS_VERSION; 1617 uint16_t supported_evmcs_version; 1618 1619 ret = kvm_vcpu_enable_cap(cs, KVM_CAP_HYPERV_ENLIGHTENED_VMCS, 0, 1620 (uintptr_t)&supported_evmcs_version); 1621 1622 /* 1623 * KVM is required to support EVMCS ver.1. as that's what 'hv-evmcs' 1624 * option sets. Note: we hardcode the maximum supported eVMCS version 1625 * to '1' as well so 'hv-evmcs' feature is migratable even when (and if) 1626 * ver.2 is implemented. A new option (e.g. 'hv-evmcs=2') will then have 1627 * to be added. 1628 */ 1629 if (ret < 0) { 1630 error_report("Hyper-V %s is not supported by kernel", 1631 kvm_hyperv_properties[HYPERV_FEAT_EVMCS].desc); 1632 return ret; 1633 } 1634 1635 if (!evmcs_version_supported(evmcs_version, supported_evmcs_version)) { 1636 error_report("eVMCS version range [%d..%d] is not supported by " 1637 "kernel (supported: [%d..%d])", evmcs_version & 0xff, 1638 evmcs_version >> 8, supported_evmcs_version & 0xff, 1639 supported_evmcs_version >> 8); 1640 return -ENOTSUP; 1641 } 1642 } 1643 1644 if (cpu->hyperv_enforce_cpuid) { 1645 ret = kvm_vcpu_enable_cap(cs, KVM_CAP_HYPERV_ENFORCE_CPUID, 0, 1); 1646 if (ret < 0) { 1647 error_report("failed to enable KVM_CAP_HYPERV_ENFORCE_CPUID: %s", 1648 strerror(-ret)); 1649 return ret; 1650 } 1651 } 1652 1653 return 0; 1654 } 1655 1656 static Error *invtsc_mig_blocker; 1657 1658 #define KVM_MAX_CPUID_ENTRIES 100 1659 1660 static void kvm_init_xsave(CPUX86State *env) 1661 { 1662 if (has_xsave2) { 1663 env->xsave_buf_len = QEMU_ALIGN_UP(has_xsave2, 4096); 1664 } else { 1665 env->xsave_buf_len = sizeof(struct kvm_xsave); 1666 } 1667 1668 env->xsave_buf = qemu_memalign(4096, env->xsave_buf_len); 1669 memset(env->xsave_buf, 0, env->xsave_buf_len); 1670 /* 1671 * The allocated storage must be large enough for all of the 1672 * possible XSAVE state components. 1673 */ 1674 assert(kvm_arch_get_supported_cpuid(kvm_state, 0xd, 0, R_ECX) <= 1675 env->xsave_buf_len); 1676 } 1677 1678 static void kvm_init_nested_state(CPUX86State *env) 1679 { 1680 struct kvm_vmx_nested_state_hdr *vmx_hdr; 1681 uint32_t size; 1682 1683 if (!env->nested_state) { 1684 return; 1685 } 1686 1687 size = env->nested_state->size; 1688 1689 memset(env->nested_state, 0, size); 1690 env->nested_state->size = size; 1691 1692 if (cpu_has_vmx(env)) { 1693 env->nested_state->format = KVM_STATE_NESTED_FORMAT_VMX; 1694 vmx_hdr = &env->nested_state->hdr.vmx; 1695 vmx_hdr->vmxon_pa = -1ull; 1696 vmx_hdr->vmcs12_pa = -1ull; 1697 } else if (cpu_has_svm(env)) { 1698 env->nested_state->format = KVM_STATE_NESTED_FORMAT_SVM; 1699 } 1700 } 1701 1702 int kvm_arch_init_vcpu(CPUState *cs) 1703 { 1704 struct { 1705 struct kvm_cpuid2 cpuid; 1706 struct kvm_cpuid_entry2 entries[KVM_MAX_CPUID_ENTRIES]; 1707 } cpuid_data; 1708 /* 1709 * The kernel defines these structs with padding fields so there 1710 * should be no extra padding in our cpuid_data struct. 1711 */ 1712 QEMU_BUILD_BUG_ON(sizeof(cpuid_data) != 1713 sizeof(struct kvm_cpuid2) + 1714 sizeof(struct kvm_cpuid_entry2) * KVM_MAX_CPUID_ENTRIES); 1715 1716 X86CPU *cpu = X86_CPU(cs); 1717 CPUX86State *env = &cpu->env; 1718 uint32_t limit, i, j, cpuid_i; 1719 uint32_t unused; 1720 struct kvm_cpuid_entry2 *c; 1721 uint32_t signature[3]; 1722 int kvm_base = KVM_CPUID_SIGNATURE; 1723 int max_nested_state_len; 1724 int r; 1725 Error *local_err = NULL; 1726 1727 memset(&cpuid_data, 0, sizeof(cpuid_data)); 1728 1729 cpuid_i = 0; 1730 1731 has_xsave2 = kvm_check_extension(cs->kvm_state, KVM_CAP_XSAVE2); 1732 1733 r = kvm_arch_set_tsc_khz(cs); 1734 if (r < 0) { 1735 return r; 1736 } 1737 1738 /* vcpu's TSC frequency is either specified by user, or following 1739 * the value used by KVM if the former is not present. In the 1740 * latter case, we query it from KVM and record in env->tsc_khz, 1741 * so that vcpu's TSC frequency can be migrated later via this field. 1742 */ 1743 if (!env->tsc_khz) { 1744 r = kvm_check_extension(cs->kvm_state, KVM_CAP_GET_TSC_KHZ) ? 1745 kvm_vcpu_ioctl(cs, KVM_GET_TSC_KHZ) : 1746 -ENOTSUP; 1747 if (r > 0) { 1748 env->tsc_khz = r; 1749 } 1750 } 1751 1752 env->apic_bus_freq = KVM_APIC_BUS_FREQUENCY; 1753 1754 /* 1755 * kvm_hyperv_expand_features() is called here for the second time in case 1756 * KVM_CAP_SYS_HYPERV_CPUID is not supported. While we can't possibly handle 1757 * 'query-cpu-model-expansion' in this case as we don't have a KVM vCPU to 1758 * check which Hyper-V enlightenments are supported and which are not, we 1759 * can still proceed and check/expand Hyper-V enlightenments here so legacy 1760 * behavior is preserved. 1761 */ 1762 if (!kvm_hyperv_expand_features(cpu, &local_err)) { 1763 error_report_err(local_err); 1764 return -ENOSYS; 1765 } 1766 1767 if (hyperv_enabled(cpu)) { 1768 r = hyperv_init_vcpu(cpu); 1769 if (r) { 1770 return r; 1771 } 1772 1773 cpuid_i = hyperv_fill_cpuids(cs, cpuid_data.entries); 1774 kvm_base = KVM_CPUID_SIGNATURE_NEXT; 1775 has_msr_hv_hypercall = true; 1776 } 1777 1778 if (cs->kvm_state->xen_version) { 1779 #ifdef CONFIG_XEN_EMU 1780 struct kvm_cpuid_entry2 *xen_max_leaf; 1781 1782 memcpy(signature, "XenVMMXenVMM", 12); 1783 1784 xen_max_leaf = c = &cpuid_data.entries[cpuid_i++]; 1785 c->function = kvm_base + XEN_CPUID_SIGNATURE; 1786 c->eax = kvm_base + XEN_CPUID_TIME; 1787 c->ebx = signature[0]; 1788 c->ecx = signature[1]; 1789 c->edx = signature[2]; 1790 1791 c = &cpuid_data.entries[cpuid_i++]; 1792 c->function = kvm_base + XEN_CPUID_VENDOR; 1793 c->eax = cs->kvm_state->xen_version; 1794 c->ebx = 0; 1795 c->ecx = 0; 1796 c->edx = 0; 1797 1798 c = &cpuid_data.entries[cpuid_i++]; 1799 c->function = kvm_base + XEN_CPUID_HVM_MSR; 1800 /* Number of hypercall-transfer pages */ 1801 c->eax = 1; 1802 /* Hypercall MSR base address */ 1803 if (hyperv_enabled(cpu)) { 1804 c->ebx = XEN_HYPERCALL_MSR_HYPERV; 1805 kvm_xen_init(cs->kvm_state, c->ebx); 1806 } else { 1807 c->ebx = XEN_HYPERCALL_MSR; 1808 } 1809 c->ecx = 0; 1810 c->edx = 0; 1811 1812 c = &cpuid_data.entries[cpuid_i++]; 1813 c->function = kvm_base + XEN_CPUID_TIME; 1814 c->eax = ((!!tsc_is_stable_and_known(env) << 1) | 1815 (!!(env->features[FEAT_8000_0001_EDX] & CPUID_EXT2_RDTSCP) << 2)); 1816 /* default=0 (emulate if necessary) */ 1817 c->ebx = 0; 1818 /* guest tsc frequency */ 1819 c->ecx = env->user_tsc_khz; 1820 /* guest tsc incarnation (migration count) */ 1821 c->edx = 0; 1822 1823 c = &cpuid_data.entries[cpuid_i++]; 1824 c->function = kvm_base + XEN_CPUID_HVM; 1825 xen_max_leaf->eax = kvm_base + XEN_CPUID_HVM; 1826 if (cs->kvm_state->xen_version >= XEN_VERSION(4, 5)) { 1827 c->function = kvm_base + XEN_CPUID_HVM; 1828 1829 if (cpu->xen_vapic) { 1830 c->eax |= XEN_HVM_CPUID_APIC_ACCESS_VIRT; 1831 c->eax |= XEN_HVM_CPUID_X2APIC_VIRT; 1832 } 1833 1834 c->eax |= XEN_HVM_CPUID_IOMMU_MAPPINGS; 1835 1836 if (cs->kvm_state->xen_version >= XEN_VERSION(4, 6)) { 1837 c->eax |= XEN_HVM_CPUID_VCPU_ID_PRESENT; 1838 c->ebx = cs->cpu_index; 1839 } 1840 1841 if (cs->kvm_state->xen_version >= XEN_VERSION(4, 17)) { 1842 c->eax |= XEN_HVM_CPUID_UPCALL_VECTOR; 1843 } 1844 } 1845 1846 r = kvm_xen_init_vcpu(cs); 1847 if (r) { 1848 return r; 1849 } 1850 1851 kvm_base += 0x100; 1852 #else /* CONFIG_XEN_EMU */ 1853 /* This should never happen as kvm_arch_init() would have died first. */ 1854 fprintf(stderr, "Cannot enable Xen CPUID without Xen support\n"); 1855 abort(); 1856 #endif 1857 } else if (cpu->expose_kvm) { 1858 memcpy(signature, "KVMKVMKVM\0\0\0", 12); 1859 c = &cpuid_data.entries[cpuid_i++]; 1860 c->function = KVM_CPUID_SIGNATURE | kvm_base; 1861 c->eax = KVM_CPUID_FEATURES | kvm_base; 1862 c->ebx = signature[0]; 1863 c->ecx = signature[1]; 1864 c->edx = signature[2]; 1865 1866 c = &cpuid_data.entries[cpuid_i++]; 1867 c->function = KVM_CPUID_FEATURES | kvm_base; 1868 c->eax = env->features[FEAT_KVM]; 1869 c->edx = env->features[FEAT_KVM_HINTS]; 1870 } 1871 1872 cpu_x86_cpuid(env, 0, 0, &limit, &unused, &unused, &unused); 1873 1874 if (cpu->kvm_pv_enforce_cpuid) { 1875 r = kvm_vcpu_enable_cap(cs, KVM_CAP_ENFORCE_PV_FEATURE_CPUID, 0, 1); 1876 if (r < 0) { 1877 fprintf(stderr, 1878 "failed to enable KVM_CAP_ENFORCE_PV_FEATURE_CPUID: %s", 1879 strerror(-r)); 1880 abort(); 1881 } 1882 } 1883 1884 for (i = 0; i <= limit; i++) { 1885 if (cpuid_i == KVM_MAX_CPUID_ENTRIES) { 1886 fprintf(stderr, "unsupported level value: 0x%x\n", limit); 1887 abort(); 1888 } 1889 c = &cpuid_data.entries[cpuid_i++]; 1890 1891 switch (i) { 1892 case 2: { 1893 /* Keep reading function 2 till all the input is received */ 1894 int times; 1895 1896 c->function = i; 1897 c->flags = KVM_CPUID_FLAG_STATEFUL_FUNC | 1898 KVM_CPUID_FLAG_STATE_READ_NEXT; 1899 cpu_x86_cpuid(env, i, 0, &c->eax, &c->ebx, &c->ecx, &c->edx); 1900 times = c->eax & 0xff; 1901 1902 for (j = 1; j < times; ++j) { 1903 if (cpuid_i == KVM_MAX_CPUID_ENTRIES) { 1904 fprintf(stderr, "cpuid_data is full, no space for " 1905 "cpuid(eax:2):eax & 0xf = 0x%x\n", times); 1906 abort(); 1907 } 1908 c = &cpuid_data.entries[cpuid_i++]; 1909 c->function = i; 1910 c->flags = KVM_CPUID_FLAG_STATEFUL_FUNC; 1911 cpu_x86_cpuid(env, i, 0, &c->eax, &c->ebx, &c->ecx, &c->edx); 1912 } 1913 break; 1914 } 1915 case 0x1f: 1916 if (env->nr_dies < 2) { 1917 cpuid_i--; 1918 break; 1919 } 1920 /* fallthrough */ 1921 case 4: 1922 case 0xb: 1923 case 0xd: 1924 for (j = 0; ; j++) { 1925 if (i == 0xd && j == 64) { 1926 break; 1927 } 1928 1929 if (i == 0x1f && j == 64) { 1930 break; 1931 } 1932 1933 c->function = i; 1934 c->flags = KVM_CPUID_FLAG_SIGNIFCANT_INDEX; 1935 c->index = j; 1936 cpu_x86_cpuid(env, i, j, &c->eax, &c->ebx, &c->ecx, &c->edx); 1937 1938 if (i == 4 && c->eax == 0) { 1939 break; 1940 } 1941 if (i == 0xb && !(c->ecx & 0xff00)) { 1942 break; 1943 } 1944 if (i == 0x1f && !(c->ecx & 0xff00)) { 1945 break; 1946 } 1947 if (i == 0xd && c->eax == 0) { 1948 continue; 1949 } 1950 if (cpuid_i == KVM_MAX_CPUID_ENTRIES) { 1951 fprintf(stderr, "cpuid_data is full, no space for " 1952 "cpuid(eax:0x%x,ecx:0x%x)\n", i, j); 1953 abort(); 1954 } 1955 c = &cpuid_data.entries[cpuid_i++]; 1956 } 1957 break; 1958 case 0x12: 1959 for (j = 0; ; j++) { 1960 c->function = i; 1961 c->flags = KVM_CPUID_FLAG_SIGNIFCANT_INDEX; 1962 c->index = j; 1963 cpu_x86_cpuid(env, i, j, &c->eax, &c->ebx, &c->ecx, &c->edx); 1964 1965 if (j > 1 && (c->eax & 0xf) != 1) { 1966 break; 1967 } 1968 1969 if (cpuid_i == KVM_MAX_CPUID_ENTRIES) { 1970 fprintf(stderr, "cpuid_data is full, no space for " 1971 "cpuid(eax:0x12,ecx:0x%x)\n", j); 1972 abort(); 1973 } 1974 c = &cpuid_data.entries[cpuid_i++]; 1975 } 1976 break; 1977 case 0x7: 1978 case 0x14: 1979 case 0x1d: 1980 case 0x1e: { 1981 uint32_t times; 1982 1983 c->function = i; 1984 c->index = 0; 1985 c->flags = KVM_CPUID_FLAG_SIGNIFCANT_INDEX; 1986 cpu_x86_cpuid(env, i, 0, &c->eax, &c->ebx, &c->ecx, &c->edx); 1987 times = c->eax; 1988 1989 for (j = 1; j <= times; ++j) { 1990 if (cpuid_i == KVM_MAX_CPUID_ENTRIES) { 1991 fprintf(stderr, "cpuid_data is full, no space for " 1992 "cpuid(eax:0x%x,ecx:0x%x)\n", i, j); 1993 abort(); 1994 } 1995 c = &cpuid_data.entries[cpuid_i++]; 1996 c->function = i; 1997 c->index = j; 1998 c->flags = KVM_CPUID_FLAG_SIGNIFCANT_INDEX; 1999 cpu_x86_cpuid(env, i, j, &c->eax, &c->ebx, &c->ecx, &c->edx); 2000 } 2001 break; 2002 } 2003 default: 2004 c->function = i; 2005 c->flags = 0; 2006 cpu_x86_cpuid(env, i, 0, &c->eax, &c->ebx, &c->ecx, &c->edx); 2007 if (!c->eax && !c->ebx && !c->ecx && !c->edx) { 2008 /* 2009 * KVM already returns all zeroes if a CPUID entry is missing, 2010 * so we can omit it and avoid hitting KVM's 80-entry limit. 2011 */ 2012 cpuid_i--; 2013 } 2014 break; 2015 } 2016 } 2017 2018 if (limit >= 0x0a) { 2019 uint32_t eax, edx; 2020 2021 cpu_x86_cpuid(env, 0x0a, 0, &eax, &unused, &unused, &edx); 2022 2023 has_architectural_pmu_version = eax & 0xff; 2024 if (has_architectural_pmu_version > 0) { 2025 num_architectural_pmu_gp_counters = (eax & 0xff00) >> 8; 2026 2027 /* Shouldn't be more than 32, since that's the number of bits 2028 * available in EBX to tell us _which_ counters are available. 2029 * Play it safe. 2030 */ 2031 if (num_architectural_pmu_gp_counters > MAX_GP_COUNTERS) { 2032 num_architectural_pmu_gp_counters = MAX_GP_COUNTERS; 2033 } 2034 2035 if (has_architectural_pmu_version > 1) { 2036 num_architectural_pmu_fixed_counters = edx & 0x1f; 2037 2038 if (num_architectural_pmu_fixed_counters > MAX_FIXED_COUNTERS) { 2039 num_architectural_pmu_fixed_counters = MAX_FIXED_COUNTERS; 2040 } 2041 } 2042 } 2043 } 2044 2045 cpu_x86_cpuid(env, 0x80000000, 0, &limit, &unused, &unused, &unused); 2046 2047 for (i = 0x80000000; i <= limit; i++) { 2048 if (cpuid_i == KVM_MAX_CPUID_ENTRIES) { 2049 fprintf(stderr, "unsupported xlevel value: 0x%x\n", limit); 2050 abort(); 2051 } 2052 c = &cpuid_data.entries[cpuid_i++]; 2053 2054 switch (i) { 2055 case 0x8000001d: 2056 /* Query for all AMD cache information leaves */ 2057 for (j = 0; ; j++) { 2058 c->function = i; 2059 c->flags = KVM_CPUID_FLAG_SIGNIFCANT_INDEX; 2060 c->index = j; 2061 cpu_x86_cpuid(env, i, j, &c->eax, &c->ebx, &c->ecx, &c->edx); 2062 2063 if (c->eax == 0) { 2064 break; 2065 } 2066 if (cpuid_i == KVM_MAX_CPUID_ENTRIES) { 2067 fprintf(stderr, "cpuid_data is full, no space for " 2068 "cpuid(eax:0x%x,ecx:0x%x)\n", i, j); 2069 abort(); 2070 } 2071 c = &cpuid_data.entries[cpuid_i++]; 2072 } 2073 break; 2074 default: 2075 c->function = i; 2076 c->flags = 0; 2077 cpu_x86_cpuid(env, i, 0, &c->eax, &c->ebx, &c->ecx, &c->edx); 2078 if (!c->eax && !c->ebx && !c->ecx && !c->edx) { 2079 /* 2080 * KVM already returns all zeroes if a CPUID entry is missing, 2081 * so we can omit it and avoid hitting KVM's 80-entry limit. 2082 */ 2083 cpuid_i--; 2084 } 2085 break; 2086 } 2087 } 2088 2089 /* Call Centaur's CPUID instructions they are supported. */ 2090 if (env->cpuid_xlevel2 > 0) { 2091 cpu_x86_cpuid(env, 0xC0000000, 0, &limit, &unused, &unused, &unused); 2092 2093 for (i = 0xC0000000; i <= limit; i++) { 2094 if (cpuid_i == KVM_MAX_CPUID_ENTRIES) { 2095 fprintf(stderr, "unsupported xlevel2 value: 0x%x\n", limit); 2096 abort(); 2097 } 2098 c = &cpuid_data.entries[cpuid_i++]; 2099 2100 c->function = i; 2101 c->flags = 0; 2102 cpu_x86_cpuid(env, i, 0, &c->eax, &c->ebx, &c->ecx, &c->edx); 2103 } 2104 } 2105 2106 cpuid_data.cpuid.nent = cpuid_i; 2107 2108 if (((env->cpuid_version >> 8)&0xF) >= 6 2109 && (env->features[FEAT_1_EDX] & (CPUID_MCE | CPUID_MCA)) == 2110 (CPUID_MCE | CPUID_MCA)) { 2111 uint64_t mcg_cap, unsupported_caps; 2112 int banks; 2113 int ret; 2114 2115 ret = kvm_get_mce_cap_supported(cs->kvm_state, &mcg_cap, &banks); 2116 if (ret < 0) { 2117 fprintf(stderr, "kvm_get_mce_cap_supported: %s", strerror(-ret)); 2118 return ret; 2119 } 2120 2121 if (banks < (env->mcg_cap & MCG_CAP_BANKS_MASK)) { 2122 error_report("kvm: Unsupported MCE bank count (QEMU = %d, KVM = %d)", 2123 (int)(env->mcg_cap & MCG_CAP_BANKS_MASK), banks); 2124 return -ENOTSUP; 2125 } 2126 2127 unsupported_caps = env->mcg_cap & ~(mcg_cap | MCG_CAP_BANKS_MASK); 2128 if (unsupported_caps) { 2129 if (unsupported_caps & MCG_LMCE_P) { 2130 error_report("kvm: LMCE not supported"); 2131 return -ENOTSUP; 2132 } 2133 warn_report("Unsupported MCG_CAP bits: 0x%" PRIx64, 2134 unsupported_caps); 2135 } 2136 2137 env->mcg_cap &= mcg_cap | MCG_CAP_BANKS_MASK; 2138 ret = kvm_vcpu_ioctl(cs, KVM_X86_SETUP_MCE, &env->mcg_cap); 2139 if (ret < 0) { 2140 fprintf(stderr, "KVM_X86_SETUP_MCE: %s", strerror(-ret)); 2141 return ret; 2142 } 2143 } 2144 2145 cpu->vmsentry = qemu_add_vm_change_state_handler(cpu_update_state, env); 2146 2147 c = cpuid_find_entry(&cpuid_data.cpuid, 1, 0); 2148 if (c) { 2149 has_msr_feature_control = !!(c->ecx & CPUID_EXT_VMX) || 2150 !!(c->ecx & CPUID_EXT_SMX); 2151 } 2152 2153 c = cpuid_find_entry(&cpuid_data.cpuid, 7, 0); 2154 if (c && (c->ebx & CPUID_7_0_EBX_SGX)) { 2155 has_msr_feature_control = true; 2156 } 2157 2158 if (env->mcg_cap & MCG_LMCE_P) { 2159 has_msr_mcg_ext_ctl = has_msr_feature_control = true; 2160 } 2161 2162 if (!env->user_tsc_khz) { 2163 if ((env->features[FEAT_8000_0007_EDX] & CPUID_APM_INVTSC) && 2164 invtsc_mig_blocker == NULL) { 2165 error_setg(&invtsc_mig_blocker, 2166 "State blocked by non-migratable CPU device" 2167 " (invtsc flag)"); 2168 r = migrate_add_blocker(&invtsc_mig_blocker, &local_err); 2169 if (r < 0) { 2170 error_report_err(local_err); 2171 return r; 2172 } 2173 } 2174 } 2175 2176 if (cpu->vmware_cpuid_freq 2177 /* Guests depend on 0x40000000 to detect this feature, so only expose 2178 * it if KVM exposes leaf 0x40000000. (Conflicts with Hyper-V) */ 2179 && cpu->expose_kvm 2180 && kvm_base == KVM_CPUID_SIGNATURE 2181 /* TSC clock must be stable and known for this feature. */ 2182 && tsc_is_stable_and_known(env)) { 2183 2184 c = &cpuid_data.entries[cpuid_i++]; 2185 c->function = KVM_CPUID_SIGNATURE | 0x10; 2186 c->eax = env->tsc_khz; 2187 c->ebx = env->apic_bus_freq / 1000; /* Hz to KHz */ 2188 c->ecx = c->edx = 0; 2189 2190 c = cpuid_find_entry(&cpuid_data.cpuid, kvm_base, 0); 2191 c->eax = MAX(c->eax, KVM_CPUID_SIGNATURE | 0x10); 2192 } 2193 2194 cpuid_data.cpuid.nent = cpuid_i; 2195 2196 cpuid_data.cpuid.padding = 0; 2197 r = kvm_vcpu_ioctl(cs, KVM_SET_CPUID2, &cpuid_data); 2198 if (r) { 2199 goto fail; 2200 } 2201 kvm_init_xsave(env); 2202 2203 max_nested_state_len = kvm_max_nested_state_length(); 2204 if (max_nested_state_len > 0) { 2205 assert(max_nested_state_len >= offsetof(struct kvm_nested_state, data)); 2206 2207 if (cpu_has_vmx(env) || cpu_has_svm(env)) { 2208 env->nested_state = g_malloc0(max_nested_state_len); 2209 env->nested_state->size = max_nested_state_len; 2210 2211 kvm_init_nested_state(env); 2212 } 2213 } 2214 2215 cpu->kvm_msr_buf = g_malloc0(MSR_BUF_SIZE); 2216 2217 if (!(env->features[FEAT_8000_0001_EDX] & CPUID_EXT2_RDTSCP)) { 2218 has_msr_tsc_aux = false; 2219 } 2220 2221 kvm_init_msrs(cpu); 2222 2223 return 0; 2224 2225 fail: 2226 migrate_del_blocker(&invtsc_mig_blocker); 2227 2228 return r; 2229 } 2230 2231 int kvm_arch_destroy_vcpu(CPUState *cs) 2232 { 2233 X86CPU *cpu = X86_CPU(cs); 2234 CPUX86State *env = &cpu->env; 2235 2236 g_free(env->xsave_buf); 2237 2238 g_free(cpu->kvm_msr_buf); 2239 cpu->kvm_msr_buf = NULL; 2240 2241 g_free(env->nested_state); 2242 env->nested_state = NULL; 2243 2244 qemu_del_vm_change_state_handler(cpu->vmsentry); 2245 2246 return 0; 2247 } 2248 2249 void kvm_arch_reset_vcpu(X86CPU *cpu) 2250 { 2251 CPUX86State *env = &cpu->env; 2252 2253 env->xcr0 = 1; 2254 if (kvm_irqchip_in_kernel()) { 2255 env->mp_state = cpu_is_bsp(cpu) ? KVM_MP_STATE_RUNNABLE : 2256 KVM_MP_STATE_UNINITIALIZED; 2257 } else { 2258 env->mp_state = KVM_MP_STATE_RUNNABLE; 2259 } 2260 2261 /* enabled by default */ 2262 env->poll_control_msr = 1; 2263 2264 kvm_init_nested_state(env); 2265 2266 sev_es_set_reset_vector(CPU(cpu)); 2267 } 2268 2269 void kvm_arch_after_reset_vcpu(X86CPU *cpu) 2270 { 2271 CPUX86State *env = &cpu->env; 2272 int i; 2273 2274 /* 2275 * Reset SynIC after all other devices have been reset to let them remove 2276 * their SINT routes first. 2277 */ 2278 if (hyperv_feat_enabled(cpu, HYPERV_FEAT_SYNIC)) { 2279 for (i = 0; i < ARRAY_SIZE(env->msr_hv_synic_sint); i++) { 2280 env->msr_hv_synic_sint[i] = HV_SINT_MASKED; 2281 } 2282 2283 hyperv_x86_synic_reset(cpu); 2284 } 2285 } 2286 2287 void kvm_arch_do_init_vcpu(X86CPU *cpu) 2288 { 2289 CPUX86State *env = &cpu->env; 2290 2291 /* APs get directly into wait-for-SIPI state. */ 2292 if (env->mp_state == KVM_MP_STATE_UNINITIALIZED) { 2293 env->mp_state = KVM_MP_STATE_INIT_RECEIVED; 2294 } 2295 } 2296 2297 static int kvm_get_supported_feature_msrs(KVMState *s) 2298 { 2299 int ret = 0; 2300 2301 if (kvm_feature_msrs != NULL) { 2302 return 0; 2303 } 2304 2305 if (!kvm_check_extension(s, KVM_CAP_GET_MSR_FEATURES)) { 2306 return 0; 2307 } 2308 2309 struct kvm_msr_list msr_list; 2310 2311 msr_list.nmsrs = 0; 2312 ret = kvm_ioctl(s, KVM_GET_MSR_FEATURE_INDEX_LIST, &msr_list); 2313 if (ret < 0 && ret != -E2BIG) { 2314 error_report("Fetch KVM feature MSR list failed: %s", 2315 strerror(-ret)); 2316 return ret; 2317 } 2318 2319 assert(msr_list.nmsrs > 0); 2320 kvm_feature_msrs = g_malloc0(sizeof(msr_list) + 2321 msr_list.nmsrs * sizeof(msr_list.indices[0])); 2322 2323 kvm_feature_msrs->nmsrs = msr_list.nmsrs; 2324 ret = kvm_ioctl(s, KVM_GET_MSR_FEATURE_INDEX_LIST, kvm_feature_msrs); 2325 2326 if (ret < 0) { 2327 error_report("Fetch KVM feature MSR list failed: %s", 2328 strerror(-ret)); 2329 g_free(kvm_feature_msrs); 2330 kvm_feature_msrs = NULL; 2331 return ret; 2332 } 2333 2334 return 0; 2335 } 2336 2337 static int kvm_get_supported_msrs(KVMState *s) 2338 { 2339 int ret = 0; 2340 struct kvm_msr_list msr_list, *kvm_msr_list; 2341 2342 /* 2343 * Obtain MSR list from KVM. These are the MSRs that we must 2344 * save/restore. 2345 */ 2346 msr_list.nmsrs = 0; 2347 ret = kvm_ioctl(s, KVM_GET_MSR_INDEX_LIST, &msr_list); 2348 if (ret < 0 && ret != -E2BIG) { 2349 return ret; 2350 } 2351 /* 2352 * Old kernel modules had a bug and could write beyond the provided 2353 * memory. Allocate at least a safe amount of 1K. 2354 */ 2355 kvm_msr_list = g_malloc0(MAX(1024, sizeof(msr_list) + 2356 msr_list.nmsrs * 2357 sizeof(msr_list.indices[0]))); 2358 2359 kvm_msr_list->nmsrs = msr_list.nmsrs; 2360 ret = kvm_ioctl(s, KVM_GET_MSR_INDEX_LIST, kvm_msr_list); 2361 if (ret >= 0) { 2362 int i; 2363 2364 for (i = 0; i < kvm_msr_list->nmsrs; i++) { 2365 switch (kvm_msr_list->indices[i]) { 2366 case MSR_STAR: 2367 has_msr_star = true; 2368 break; 2369 case MSR_VM_HSAVE_PA: 2370 has_msr_hsave_pa = true; 2371 break; 2372 case MSR_TSC_AUX: 2373 has_msr_tsc_aux = true; 2374 break; 2375 case MSR_TSC_ADJUST: 2376 has_msr_tsc_adjust = true; 2377 break; 2378 case MSR_IA32_TSCDEADLINE: 2379 has_msr_tsc_deadline = true; 2380 break; 2381 case MSR_IA32_SMBASE: 2382 has_msr_smbase = true; 2383 break; 2384 case MSR_SMI_COUNT: 2385 has_msr_smi_count = true; 2386 break; 2387 case MSR_IA32_MISC_ENABLE: 2388 has_msr_misc_enable = true; 2389 break; 2390 case MSR_IA32_BNDCFGS: 2391 has_msr_bndcfgs = true; 2392 break; 2393 case MSR_IA32_XSS: 2394 has_msr_xss = true; 2395 break; 2396 case MSR_IA32_UMWAIT_CONTROL: 2397 has_msr_umwait = true; 2398 break; 2399 case HV_X64_MSR_CRASH_CTL: 2400 has_msr_hv_crash = true; 2401 break; 2402 case HV_X64_MSR_RESET: 2403 has_msr_hv_reset = true; 2404 break; 2405 case HV_X64_MSR_VP_INDEX: 2406 has_msr_hv_vpindex = true; 2407 break; 2408 case HV_X64_MSR_VP_RUNTIME: 2409 has_msr_hv_runtime = true; 2410 break; 2411 case HV_X64_MSR_SCONTROL: 2412 has_msr_hv_synic = true; 2413 break; 2414 case HV_X64_MSR_STIMER0_CONFIG: 2415 has_msr_hv_stimer = true; 2416 break; 2417 case HV_X64_MSR_TSC_FREQUENCY: 2418 has_msr_hv_frequencies = true; 2419 break; 2420 case HV_X64_MSR_REENLIGHTENMENT_CONTROL: 2421 has_msr_hv_reenlightenment = true; 2422 break; 2423 case HV_X64_MSR_SYNDBG_OPTIONS: 2424 has_msr_hv_syndbg_options = true; 2425 break; 2426 case MSR_IA32_SPEC_CTRL: 2427 has_msr_spec_ctrl = true; 2428 break; 2429 case MSR_AMD64_TSC_RATIO: 2430 has_tsc_scale_msr = true; 2431 break; 2432 case MSR_IA32_TSX_CTRL: 2433 has_msr_tsx_ctrl = true; 2434 break; 2435 case MSR_VIRT_SSBD: 2436 has_msr_virt_ssbd = true; 2437 break; 2438 case MSR_IA32_ARCH_CAPABILITIES: 2439 has_msr_arch_capabs = true; 2440 break; 2441 case MSR_IA32_CORE_CAPABILITY: 2442 has_msr_core_capabs = true; 2443 break; 2444 case MSR_IA32_PERF_CAPABILITIES: 2445 has_msr_perf_capabs = true; 2446 break; 2447 case MSR_IA32_VMX_VMFUNC: 2448 has_msr_vmx_vmfunc = true; 2449 break; 2450 case MSR_IA32_UCODE_REV: 2451 has_msr_ucode_rev = true; 2452 break; 2453 case MSR_IA32_VMX_PROCBASED_CTLS2: 2454 has_msr_vmx_procbased_ctls2 = true; 2455 break; 2456 case MSR_IA32_PKRS: 2457 has_msr_pkrs = true; 2458 break; 2459 } 2460 } 2461 } 2462 2463 g_free(kvm_msr_list); 2464 2465 return ret; 2466 } 2467 2468 static bool kvm_rdmsr_core_thread_count(X86CPU *cpu, uint32_t msr, 2469 uint64_t *val) 2470 { 2471 CPUState *cs = CPU(cpu); 2472 2473 *val = cs->nr_threads * cs->nr_cores; /* thread count, bits 15..0 */ 2474 *val |= ((uint32_t)cs->nr_cores << 16); /* core count, bits 31..16 */ 2475 2476 return true; 2477 } 2478 2479 static Notifier smram_machine_done; 2480 static KVMMemoryListener smram_listener; 2481 static AddressSpace smram_address_space; 2482 static MemoryRegion smram_as_root; 2483 static MemoryRegion smram_as_mem; 2484 2485 static void register_smram_listener(Notifier *n, void *unused) 2486 { 2487 MemoryRegion *smram = 2488 (MemoryRegion *) object_resolve_path("/machine/smram", NULL); 2489 2490 /* Outer container... */ 2491 memory_region_init(&smram_as_root, OBJECT(kvm_state), "mem-container-smram", ~0ull); 2492 memory_region_set_enabled(&smram_as_root, true); 2493 2494 /* ... with two regions inside: normal system memory with low 2495 * priority, and... 2496 */ 2497 memory_region_init_alias(&smram_as_mem, OBJECT(kvm_state), "mem-smram", 2498 get_system_memory(), 0, ~0ull); 2499 memory_region_add_subregion_overlap(&smram_as_root, 0, &smram_as_mem, 0); 2500 memory_region_set_enabled(&smram_as_mem, true); 2501 2502 if (smram) { 2503 /* ... SMRAM with higher priority */ 2504 memory_region_add_subregion_overlap(&smram_as_root, 0, smram, 10); 2505 memory_region_set_enabled(smram, true); 2506 } 2507 2508 address_space_init(&smram_address_space, &smram_as_root, "KVM-SMRAM"); 2509 kvm_memory_listener_register(kvm_state, &smram_listener, 2510 &smram_address_space, 1, "kvm-smram"); 2511 } 2512 2513 int kvm_arch_get_default_type(MachineState *ms) 2514 { 2515 return 0; 2516 } 2517 2518 int kvm_arch_init(MachineState *ms, KVMState *s) 2519 { 2520 uint64_t identity_base = 0xfffbc000; 2521 uint64_t shadow_mem; 2522 int ret; 2523 struct utsname utsname; 2524 Error *local_err = NULL; 2525 2526 /* 2527 * Initialize SEV context, if required 2528 * 2529 * If no memory encryption is requested (ms->cgs == NULL) this is 2530 * a no-op. 2531 * 2532 * It's also a no-op if a non-SEV confidential guest support 2533 * mechanism is selected. SEV is the only mechanism available to 2534 * select on x86 at present, so this doesn't arise, but if new 2535 * mechanisms are supported in future (e.g. TDX), they'll need 2536 * their own initialization either here or elsewhere. 2537 */ 2538 ret = sev_kvm_init(ms->cgs, &local_err); 2539 if (ret < 0) { 2540 error_report_err(local_err); 2541 return ret; 2542 } 2543 2544 has_xcrs = kvm_check_extension(s, KVM_CAP_XCRS); 2545 has_sregs2 = kvm_check_extension(s, KVM_CAP_SREGS2) > 0; 2546 2547 hv_vpindex_settable = kvm_check_extension(s, KVM_CAP_HYPERV_VP_INDEX); 2548 2549 has_exception_payload = kvm_check_extension(s, KVM_CAP_EXCEPTION_PAYLOAD); 2550 if (has_exception_payload) { 2551 ret = kvm_vm_enable_cap(s, KVM_CAP_EXCEPTION_PAYLOAD, 0, true); 2552 if (ret < 0) { 2553 error_report("kvm: Failed to enable exception payload cap: %s", 2554 strerror(-ret)); 2555 return ret; 2556 } 2557 } 2558 2559 has_triple_fault_event = kvm_check_extension(s, KVM_CAP_X86_TRIPLE_FAULT_EVENT); 2560 if (has_triple_fault_event) { 2561 ret = kvm_vm_enable_cap(s, KVM_CAP_X86_TRIPLE_FAULT_EVENT, 0, true); 2562 if (ret < 0) { 2563 error_report("kvm: Failed to enable triple fault event cap: %s", 2564 strerror(-ret)); 2565 return ret; 2566 } 2567 } 2568 2569 if (s->xen_version) { 2570 #ifdef CONFIG_XEN_EMU 2571 if (!object_dynamic_cast(OBJECT(ms), TYPE_PC_MACHINE)) { 2572 error_report("kvm: Xen support only available in PC machine"); 2573 return -ENOTSUP; 2574 } 2575 /* hyperv_enabled() doesn't work yet. */ 2576 uint32_t msr = XEN_HYPERCALL_MSR; 2577 ret = kvm_xen_init(s, msr); 2578 if (ret < 0) { 2579 return ret; 2580 } 2581 #else 2582 error_report("kvm: Xen support not enabled in qemu"); 2583 return -ENOTSUP; 2584 #endif 2585 } 2586 2587 ret = kvm_get_supported_msrs(s); 2588 if (ret < 0) { 2589 return ret; 2590 } 2591 2592 kvm_get_supported_feature_msrs(s); 2593 2594 uname(&utsname); 2595 lm_capable_kernel = strcmp(utsname.machine, "x86_64") == 0; 2596 2597 /* 2598 * On older Intel CPUs, KVM uses vm86 mode to emulate 16-bit code directly. 2599 * In order to use vm86 mode, an EPT identity map and a TSS are needed. 2600 * Since these must be part of guest physical memory, we need to allocate 2601 * them, both by setting their start addresses in the kernel and by 2602 * creating a corresponding e820 entry. We need 4 pages before the BIOS, 2603 * so this value allows up to 16M BIOSes. 2604 */ 2605 identity_base = 0xfeffc000; 2606 ret = kvm_vm_ioctl(s, KVM_SET_IDENTITY_MAP_ADDR, &identity_base); 2607 if (ret < 0) { 2608 return ret; 2609 } 2610 2611 /* Set TSS base one page after EPT identity map. */ 2612 ret = kvm_vm_ioctl(s, KVM_SET_TSS_ADDR, identity_base + 0x1000); 2613 if (ret < 0) { 2614 return ret; 2615 } 2616 2617 /* Tell fw_cfg to notify the BIOS to reserve the range. */ 2618 ret = e820_add_entry(identity_base, 0x4000, E820_RESERVED); 2619 if (ret < 0) { 2620 fprintf(stderr, "e820_add_entry() table is full\n"); 2621 return ret; 2622 } 2623 2624 shadow_mem = object_property_get_int(OBJECT(s), "kvm-shadow-mem", &error_abort); 2625 if (shadow_mem != -1) { 2626 shadow_mem /= 4096; 2627 ret = kvm_vm_ioctl(s, KVM_SET_NR_MMU_PAGES, shadow_mem); 2628 if (ret < 0) { 2629 return ret; 2630 } 2631 } 2632 2633 if (kvm_check_extension(s, KVM_CAP_X86_SMM) && 2634 object_dynamic_cast(OBJECT(ms), TYPE_X86_MACHINE) && 2635 x86_machine_is_smm_enabled(X86_MACHINE(ms))) { 2636 smram_machine_done.notify = register_smram_listener; 2637 qemu_add_machine_init_done_notifier(&smram_machine_done); 2638 } 2639 2640 if (enable_cpu_pm) { 2641 int disable_exits = kvm_check_extension(s, KVM_CAP_X86_DISABLE_EXITS); 2642 /* Work around for kernel header with a typo. TODO: fix header and drop. */ 2643 #if defined(KVM_X86_DISABLE_EXITS_HTL) && !defined(KVM_X86_DISABLE_EXITS_HLT) 2644 #define KVM_X86_DISABLE_EXITS_HLT KVM_X86_DISABLE_EXITS_HTL 2645 #endif 2646 if (disable_exits) { 2647 disable_exits &= (KVM_X86_DISABLE_EXITS_MWAIT | 2648 KVM_X86_DISABLE_EXITS_HLT | 2649 KVM_X86_DISABLE_EXITS_PAUSE | 2650 KVM_X86_DISABLE_EXITS_CSTATE); 2651 } 2652 2653 ret = kvm_vm_enable_cap(s, KVM_CAP_X86_DISABLE_EXITS, 0, 2654 disable_exits); 2655 if (ret < 0) { 2656 error_report("kvm: guest stopping CPU not supported: %s", 2657 strerror(-ret)); 2658 } 2659 } 2660 2661 if (object_dynamic_cast(OBJECT(ms), TYPE_X86_MACHINE)) { 2662 X86MachineState *x86ms = X86_MACHINE(ms); 2663 2664 if (x86ms->bus_lock_ratelimit > 0) { 2665 ret = kvm_check_extension(s, KVM_CAP_X86_BUS_LOCK_EXIT); 2666 if (!(ret & KVM_BUS_LOCK_DETECTION_EXIT)) { 2667 error_report("kvm: bus lock detection unsupported"); 2668 return -ENOTSUP; 2669 } 2670 ret = kvm_vm_enable_cap(s, KVM_CAP_X86_BUS_LOCK_EXIT, 0, 2671 KVM_BUS_LOCK_DETECTION_EXIT); 2672 if (ret < 0) { 2673 error_report("kvm: Failed to enable bus lock detection cap: %s", 2674 strerror(-ret)); 2675 return ret; 2676 } 2677 ratelimit_init(&bus_lock_ratelimit_ctrl); 2678 ratelimit_set_speed(&bus_lock_ratelimit_ctrl, 2679 x86ms->bus_lock_ratelimit, BUS_LOCK_SLICE_TIME); 2680 } 2681 } 2682 2683 if (s->notify_vmexit != NOTIFY_VMEXIT_OPTION_DISABLE && 2684 kvm_check_extension(s, KVM_CAP_X86_NOTIFY_VMEXIT)) { 2685 uint64_t notify_window_flags = 2686 ((uint64_t)s->notify_window << 32) | 2687 KVM_X86_NOTIFY_VMEXIT_ENABLED | 2688 KVM_X86_NOTIFY_VMEXIT_USER; 2689 ret = kvm_vm_enable_cap(s, KVM_CAP_X86_NOTIFY_VMEXIT, 0, 2690 notify_window_flags); 2691 if (ret < 0) { 2692 error_report("kvm: Failed to enable notify vmexit cap: %s", 2693 strerror(-ret)); 2694 return ret; 2695 } 2696 } 2697 if (kvm_vm_check_extension(s, KVM_CAP_X86_USER_SPACE_MSR)) { 2698 bool r; 2699 2700 ret = kvm_vm_enable_cap(s, KVM_CAP_X86_USER_SPACE_MSR, 0, 2701 KVM_MSR_EXIT_REASON_FILTER); 2702 if (ret) { 2703 error_report("Could not enable user space MSRs: %s", 2704 strerror(-ret)); 2705 exit(1); 2706 } 2707 2708 r = kvm_filter_msr(s, MSR_CORE_THREAD_COUNT, 2709 kvm_rdmsr_core_thread_count, NULL); 2710 if (!r) { 2711 error_report("Could not install MSR_CORE_THREAD_COUNT handler: %s", 2712 strerror(-ret)); 2713 exit(1); 2714 } 2715 } 2716 2717 return 0; 2718 } 2719 2720 static void set_v8086_seg(struct kvm_segment *lhs, const SegmentCache *rhs) 2721 { 2722 lhs->selector = rhs->selector; 2723 lhs->base = rhs->base; 2724 lhs->limit = rhs->limit; 2725 lhs->type = 3; 2726 lhs->present = 1; 2727 lhs->dpl = 3; 2728 lhs->db = 0; 2729 lhs->s = 1; 2730 lhs->l = 0; 2731 lhs->g = 0; 2732 lhs->avl = 0; 2733 lhs->unusable = 0; 2734 } 2735 2736 static void set_seg(struct kvm_segment *lhs, const SegmentCache *rhs) 2737 { 2738 unsigned flags = rhs->flags; 2739 lhs->selector = rhs->selector; 2740 lhs->base = rhs->base; 2741 lhs->limit = rhs->limit; 2742 lhs->type = (flags >> DESC_TYPE_SHIFT) & 15; 2743 lhs->present = (flags & DESC_P_MASK) != 0; 2744 lhs->dpl = (flags >> DESC_DPL_SHIFT) & 3; 2745 lhs->db = (flags >> DESC_B_SHIFT) & 1; 2746 lhs->s = (flags & DESC_S_MASK) != 0; 2747 lhs->l = (flags >> DESC_L_SHIFT) & 1; 2748 lhs->g = (flags & DESC_G_MASK) != 0; 2749 lhs->avl = (flags & DESC_AVL_MASK) != 0; 2750 lhs->unusable = !lhs->present; 2751 lhs->padding = 0; 2752 } 2753 2754 static void get_seg(SegmentCache *lhs, const struct kvm_segment *rhs) 2755 { 2756 lhs->selector = rhs->selector; 2757 lhs->base = rhs->base; 2758 lhs->limit = rhs->limit; 2759 lhs->flags = (rhs->type << DESC_TYPE_SHIFT) | 2760 ((rhs->present && !rhs->unusable) * DESC_P_MASK) | 2761 (rhs->dpl << DESC_DPL_SHIFT) | 2762 (rhs->db << DESC_B_SHIFT) | 2763 (rhs->s * DESC_S_MASK) | 2764 (rhs->l << DESC_L_SHIFT) | 2765 (rhs->g * DESC_G_MASK) | 2766 (rhs->avl * DESC_AVL_MASK); 2767 } 2768 2769 static void kvm_getput_reg(__u64 *kvm_reg, target_ulong *qemu_reg, int set) 2770 { 2771 if (set) { 2772 *kvm_reg = *qemu_reg; 2773 } else { 2774 *qemu_reg = *kvm_reg; 2775 } 2776 } 2777 2778 static int kvm_getput_regs(X86CPU *cpu, int set) 2779 { 2780 CPUX86State *env = &cpu->env; 2781 struct kvm_regs regs; 2782 int ret = 0; 2783 2784 if (!set) { 2785 ret = kvm_vcpu_ioctl(CPU(cpu), KVM_GET_REGS, ®s); 2786 if (ret < 0) { 2787 return ret; 2788 } 2789 } 2790 2791 kvm_getput_reg(®s.rax, &env->regs[R_EAX], set); 2792 kvm_getput_reg(®s.rbx, &env->regs[R_EBX], set); 2793 kvm_getput_reg(®s.rcx, &env->regs[R_ECX], set); 2794 kvm_getput_reg(®s.rdx, &env->regs[R_EDX], set); 2795 kvm_getput_reg(®s.rsi, &env->regs[R_ESI], set); 2796 kvm_getput_reg(®s.rdi, &env->regs[R_EDI], set); 2797 kvm_getput_reg(®s.rsp, &env->regs[R_ESP], set); 2798 kvm_getput_reg(®s.rbp, &env->regs[R_EBP], set); 2799 #ifdef TARGET_X86_64 2800 kvm_getput_reg(®s.r8, &env->regs[8], set); 2801 kvm_getput_reg(®s.r9, &env->regs[9], set); 2802 kvm_getput_reg(®s.r10, &env->regs[10], set); 2803 kvm_getput_reg(®s.r11, &env->regs[11], set); 2804 kvm_getput_reg(®s.r12, &env->regs[12], set); 2805 kvm_getput_reg(®s.r13, &env->regs[13], set); 2806 kvm_getput_reg(®s.r14, &env->regs[14], set); 2807 kvm_getput_reg(®s.r15, &env->regs[15], set); 2808 #endif 2809 2810 kvm_getput_reg(®s.rflags, &env->eflags, set); 2811 kvm_getput_reg(®s.rip, &env->eip, set); 2812 2813 if (set) { 2814 ret = kvm_vcpu_ioctl(CPU(cpu), KVM_SET_REGS, ®s); 2815 } 2816 2817 return ret; 2818 } 2819 2820 static int kvm_put_xsave(X86CPU *cpu) 2821 { 2822 CPUX86State *env = &cpu->env; 2823 void *xsave = env->xsave_buf; 2824 2825 x86_cpu_xsave_all_areas(cpu, xsave, env->xsave_buf_len); 2826 2827 return kvm_vcpu_ioctl(CPU(cpu), KVM_SET_XSAVE, xsave); 2828 } 2829 2830 static int kvm_put_xcrs(X86CPU *cpu) 2831 { 2832 CPUX86State *env = &cpu->env; 2833 struct kvm_xcrs xcrs = {}; 2834 2835 if (!has_xcrs) { 2836 return 0; 2837 } 2838 2839 xcrs.nr_xcrs = 1; 2840 xcrs.flags = 0; 2841 xcrs.xcrs[0].xcr = 0; 2842 xcrs.xcrs[0].value = env->xcr0; 2843 return kvm_vcpu_ioctl(CPU(cpu), KVM_SET_XCRS, &xcrs); 2844 } 2845 2846 static int kvm_put_sregs(X86CPU *cpu) 2847 { 2848 CPUX86State *env = &cpu->env; 2849 struct kvm_sregs sregs; 2850 2851 /* 2852 * The interrupt_bitmap is ignored because KVM_SET_SREGS is 2853 * always followed by KVM_SET_VCPU_EVENTS. 2854 */ 2855 memset(sregs.interrupt_bitmap, 0, sizeof(sregs.interrupt_bitmap)); 2856 2857 if ((env->eflags & VM_MASK)) { 2858 set_v8086_seg(&sregs.cs, &env->segs[R_CS]); 2859 set_v8086_seg(&sregs.ds, &env->segs[R_DS]); 2860 set_v8086_seg(&sregs.es, &env->segs[R_ES]); 2861 set_v8086_seg(&sregs.fs, &env->segs[R_FS]); 2862 set_v8086_seg(&sregs.gs, &env->segs[R_GS]); 2863 set_v8086_seg(&sregs.ss, &env->segs[R_SS]); 2864 } else { 2865 set_seg(&sregs.cs, &env->segs[R_CS]); 2866 set_seg(&sregs.ds, &env->segs[R_DS]); 2867 set_seg(&sregs.es, &env->segs[R_ES]); 2868 set_seg(&sregs.fs, &env->segs[R_FS]); 2869 set_seg(&sregs.gs, &env->segs[R_GS]); 2870 set_seg(&sregs.ss, &env->segs[R_SS]); 2871 } 2872 2873 set_seg(&sregs.tr, &env->tr); 2874 set_seg(&sregs.ldt, &env->ldt); 2875 2876 sregs.idt.limit = env->idt.limit; 2877 sregs.idt.base = env->idt.base; 2878 memset(sregs.idt.padding, 0, sizeof sregs.idt.padding); 2879 sregs.gdt.limit = env->gdt.limit; 2880 sregs.gdt.base = env->gdt.base; 2881 memset(sregs.gdt.padding, 0, sizeof sregs.gdt.padding); 2882 2883 sregs.cr0 = env->cr[0]; 2884 sregs.cr2 = env->cr[2]; 2885 sregs.cr3 = env->cr[3]; 2886 sregs.cr4 = env->cr[4]; 2887 2888 sregs.cr8 = cpu_get_apic_tpr(cpu->apic_state); 2889 sregs.apic_base = cpu_get_apic_base(cpu->apic_state); 2890 2891 sregs.efer = env->efer; 2892 2893 return kvm_vcpu_ioctl(CPU(cpu), KVM_SET_SREGS, &sregs); 2894 } 2895 2896 static int kvm_put_sregs2(X86CPU *cpu) 2897 { 2898 CPUX86State *env = &cpu->env; 2899 struct kvm_sregs2 sregs; 2900 int i; 2901 2902 sregs.flags = 0; 2903 2904 if ((env->eflags & VM_MASK)) { 2905 set_v8086_seg(&sregs.cs, &env->segs[R_CS]); 2906 set_v8086_seg(&sregs.ds, &env->segs[R_DS]); 2907 set_v8086_seg(&sregs.es, &env->segs[R_ES]); 2908 set_v8086_seg(&sregs.fs, &env->segs[R_FS]); 2909 set_v8086_seg(&sregs.gs, &env->segs[R_GS]); 2910 set_v8086_seg(&sregs.ss, &env->segs[R_SS]); 2911 } else { 2912 set_seg(&sregs.cs, &env->segs[R_CS]); 2913 set_seg(&sregs.ds, &env->segs[R_DS]); 2914 set_seg(&sregs.es, &env->segs[R_ES]); 2915 set_seg(&sregs.fs, &env->segs[R_FS]); 2916 set_seg(&sregs.gs, &env->segs[R_GS]); 2917 set_seg(&sregs.ss, &env->segs[R_SS]); 2918 } 2919 2920 set_seg(&sregs.tr, &env->tr); 2921 set_seg(&sregs.ldt, &env->ldt); 2922 2923 sregs.idt.limit = env->idt.limit; 2924 sregs.idt.base = env->idt.base; 2925 memset(sregs.idt.padding, 0, sizeof sregs.idt.padding); 2926 sregs.gdt.limit = env->gdt.limit; 2927 sregs.gdt.base = env->gdt.base; 2928 memset(sregs.gdt.padding, 0, sizeof sregs.gdt.padding); 2929 2930 sregs.cr0 = env->cr[0]; 2931 sregs.cr2 = env->cr[2]; 2932 sregs.cr3 = env->cr[3]; 2933 sregs.cr4 = env->cr[4]; 2934 2935 sregs.cr8 = cpu_get_apic_tpr(cpu->apic_state); 2936 sregs.apic_base = cpu_get_apic_base(cpu->apic_state); 2937 2938 sregs.efer = env->efer; 2939 2940 if (env->pdptrs_valid) { 2941 for (i = 0; i < 4; i++) { 2942 sregs.pdptrs[i] = env->pdptrs[i]; 2943 } 2944 sregs.flags |= KVM_SREGS2_FLAGS_PDPTRS_VALID; 2945 } 2946 2947 return kvm_vcpu_ioctl(CPU(cpu), KVM_SET_SREGS2, &sregs); 2948 } 2949 2950 2951 static void kvm_msr_buf_reset(X86CPU *cpu) 2952 { 2953 memset(cpu->kvm_msr_buf, 0, MSR_BUF_SIZE); 2954 } 2955 2956 static void kvm_msr_entry_add(X86CPU *cpu, uint32_t index, uint64_t value) 2957 { 2958 struct kvm_msrs *msrs = cpu->kvm_msr_buf; 2959 void *limit = ((void *)msrs) + MSR_BUF_SIZE; 2960 struct kvm_msr_entry *entry = &msrs->entries[msrs->nmsrs]; 2961 2962 assert((void *)(entry + 1) <= limit); 2963 2964 entry->index = index; 2965 entry->reserved = 0; 2966 entry->data = value; 2967 msrs->nmsrs++; 2968 } 2969 2970 static int kvm_put_one_msr(X86CPU *cpu, int index, uint64_t value) 2971 { 2972 kvm_msr_buf_reset(cpu); 2973 kvm_msr_entry_add(cpu, index, value); 2974 2975 return kvm_vcpu_ioctl(CPU(cpu), KVM_SET_MSRS, cpu->kvm_msr_buf); 2976 } 2977 2978 static int kvm_get_one_msr(X86CPU *cpu, int index, uint64_t *value) 2979 { 2980 int ret; 2981 struct { 2982 struct kvm_msrs info; 2983 struct kvm_msr_entry entries[1]; 2984 } msr_data = { 2985 .info.nmsrs = 1, 2986 .entries[0].index = index, 2987 }; 2988 2989 ret = kvm_vcpu_ioctl(CPU(cpu), KVM_GET_MSRS, &msr_data); 2990 if (ret < 0) { 2991 return ret; 2992 } 2993 assert(ret == 1); 2994 *value = msr_data.entries[0].data; 2995 return ret; 2996 } 2997 void kvm_put_apicbase(X86CPU *cpu, uint64_t value) 2998 { 2999 int ret; 3000 3001 ret = kvm_put_one_msr(cpu, MSR_IA32_APICBASE, value); 3002 assert(ret == 1); 3003 } 3004 3005 static int kvm_put_tscdeadline_msr(X86CPU *cpu) 3006 { 3007 CPUX86State *env = &cpu->env; 3008 int ret; 3009 3010 if (!has_msr_tsc_deadline) { 3011 return 0; 3012 } 3013 3014 ret = kvm_put_one_msr(cpu, MSR_IA32_TSCDEADLINE, env->tsc_deadline); 3015 if (ret < 0) { 3016 return ret; 3017 } 3018 3019 assert(ret == 1); 3020 return 0; 3021 } 3022 3023 /* 3024 * Provide a separate write service for the feature control MSR in order to 3025 * kick the VCPU out of VMXON or even guest mode on reset. This has to be done 3026 * before writing any other state because forcibly leaving nested mode 3027 * invalidates the VCPU state. 3028 */ 3029 static int kvm_put_msr_feature_control(X86CPU *cpu) 3030 { 3031 int ret; 3032 3033 if (!has_msr_feature_control) { 3034 return 0; 3035 } 3036 3037 ret = kvm_put_one_msr(cpu, MSR_IA32_FEATURE_CONTROL, 3038 cpu->env.msr_ia32_feature_control); 3039 if (ret < 0) { 3040 return ret; 3041 } 3042 3043 assert(ret == 1); 3044 return 0; 3045 } 3046 3047 static uint64_t make_vmx_msr_value(uint32_t index, uint32_t features) 3048 { 3049 uint32_t default1, can_be_one, can_be_zero; 3050 uint32_t must_be_one; 3051 3052 switch (index) { 3053 case MSR_IA32_VMX_TRUE_PINBASED_CTLS: 3054 default1 = 0x00000016; 3055 break; 3056 case MSR_IA32_VMX_TRUE_PROCBASED_CTLS: 3057 default1 = 0x0401e172; 3058 break; 3059 case MSR_IA32_VMX_TRUE_ENTRY_CTLS: 3060 default1 = 0x000011ff; 3061 break; 3062 case MSR_IA32_VMX_TRUE_EXIT_CTLS: 3063 default1 = 0x00036dff; 3064 break; 3065 case MSR_IA32_VMX_PROCBASED_CTLS2: 3066 default1 = 0; 3067 break; 3068 default: 3069 abort(); 3070 } 3071 3072 /* If a feature bit is set, the control can be either set or clear. 3073 * Otherwise the value is limited to either 0 or 1 by default1. 3074 */ 3075 can_be_one = features | default1; 3076 can_be_zero = features | ~default1; 3077 must_be_one = ~can_be_zero; 3078 3079 /* 3080 * Bit 0:31 -> 0 if the control bit can be zero (i.e. 1 if it must be one). 3081 * Bit 32:63 -> 1 if the control bit can be one. 3082 */ 3083 return must_be_one | (((uint64_t)can_be_one) << 32); 3084 } 3085 3086 static void kvm_msr_entry_add_vmx(X86CPU *cpu, FeatureWordArray f) 3087 { 3088 uint64_t kvm_vmx_basic = 3089 kvm_arch_get_supported_msr_feature(kvm_state, 3090 MSR_IA32_VMX_BASIC); 3091 3092 if (!kvm_vmx_basic) { 3093 /* If the kernel doesn't support VMX feature (kvm_intel.nested=0), 3094 * then kvm_vmx_basic will be 0 and KVM_SET_MSR will fail. 3095 */ 3096 return; 3097 } 3098 3099 uint64_t kvm_vmx_misc = 3100 kvm_arch_get_supported_msr_feature(kvm_state, 3101 MSR_IA32_VMX_MISC); 3102 uint64_t kvm_vmx_ept_vpid = 3103 kvm_arch_get_supported_msr_feature(kvm_state, 3104 MSR_IA32_VMX_EPT_VPID_CAP); 3105 3106 /* 3107 * If the guest is 64-bit, a value of 1 is allowed for the host address 3108 * space size vmexit control. 3109 */ 3110 uint64_t fixed_vmx_exit = f[FEAT_8000_0001_EDX] & CPUID_EXT2_LM 3111 ? (uint64_t)VMX_VM_EXIT_HOST_ADDR_SPACE_SIZE << 32 : 0; 3112 3113 /* 3114 * Bits 0-30, 32-44 and 50-53 come from the host. KVM should 3115 * not change them for backwards compatibility. 3116 */ 3117 uint64_t fixed_vmx_basic = kvm_vmx_basic & 3118 (MSR_VMX_BASIC_VMCS_REVISION_MASK | 3119 MSR_VMX_BASIC_VMXON_REGION_SIZE_MASK | 3120 MSR_VMX_BASIC_VMCS_MEM_TYPE_MASK); 3121 3122 /* 3123 * Same for bits 0-4 and 25-27. Bits 16-24 (CR3 target count) can 3124 * change in the future but are always zero for now, clear them to be 3125 * future proof. Bits 32-63 in theory could change, though KVM does 3126 * not support dual-monitor treatment and probably never will; mask 3127 * them out as well. 3128 */ 3129 uint64_t fixed_vmx_misc = kvm_vmx_misc & 3130 (MSR_VMX_MISC_PREEMPTION_TIMER_SHIFT_MASK | 3131 MSR_VMX_MISC_MAX_MSR_LIST_SIZE_MASK); 3132 3133 /* 3134 * EPT memory types should not change either, so we do not bother 3135 * adding features for them. 3136 */ 3137 uint64_t fixed_vmx_ept_mask = 3138 (f[FEAT_VMX_SECONDARY_CTLS] & VMX_SECONDARY_EXEC_ENABLE_EPT ? 3139 MSR_VMX_EPT_UC | MSR_VMX_EPT_WB : 0); 3140 uint64_t fixed_vmx_ept_vpid = kvm_vmx_ept_vpid & fixed_vmx_ept_mask; 3141 3142 kvm_msr_entry_add(cpu, MSR_IA32_VMX_TRUE_PROCBASED_CTLS, 3143 make_vmx_msr_value(MSR_IA32_VMX_TRUE_PROCBASED_CTLS, 3144 f[FEAT_VMX_PROCBASED_CTLS])); 3145 kvm_msr_entry_add(cpu, MSR_IA32_VMX_TRUE_PINBASED_CTLS, 3146 make_vmx_msr_value(MSR_IA32_VMX_TRUE_PINBASED_CTLS, 3147 f[FEAT_VMX_PINBASED_CTLS])); 3148 kvm_msr_entry_add(cpu, MSR_IA32_VMX_TRUE_EXIT_CTLS, 3149 make_vmx_msr_value(MSR_IA32_VMX_TRUE_EXIT_CTLS, 3150 f[FEAT_VMX_EXIT_CTLS]) | fixed_vmx_exit); 3151 kvm_msr_entry_add(cpu, MSR_IA32_VMX_TRUE_ENTRY_CTLS, 3152 make_vmx_msr_value(MSR_IA32_VMX_TRUE_ENTRY_CTLS, 3153 f[FEAT_VMX_ENTRY_CTLS])); 3154 kvm_msr_entry_add(cpu, MSR_IA32_VMX_PROCBASED_CTLS2, 3155 make_vmx_msr_value(MSR_IA32_VMX_PROCBASED_CTLS2, 3156 f[FEAT_VMX_SECONDARY_CTLS])); 3157 kvm_msr_entry_add(cpu, MSR_IA32_VMX_EPT_VPID_CAP, 3158 f[FEAT_VMX_EPT_VPID_CAPS] | fixed_vmx_ept_vpid); 3159 kvm_msr_entry_add(cpu, MSR_IA32_VMX_BASIC, 3160 f[FEAT_VMX_BASIC] | fixed_vmx_basic); 3161 kvm_msr_entry_add(cpu, MSR_IA32_VMX_MISC, 3162 f[FEAT_VMX_MISC] | fixed_vmx_misc); 3163 if (has_msr_vmx_vmfunc) { 3164 kvm_msr_entry_add(cpu, MSR_IA32_VMX_VMFUNC, f[FEAT_VMX_VMFUNC]); 3165 } 3166 3167 /* 3168 * Just to be safe, write these with constant values. The CRn_FIXED1 3169 * MSRs are generated by KVM based on the vCPU's CPUID. 3170 */ 3171 kvm_msr_entry_add(cpu, MSR_IA32_VMX_CR0_FIXED0, 3172 CR0_PE_MASK | CR0_PG_MASK | CR0_NE_MASK); 3173 kvm_msr_entry_add(cpu, MSR_IA32_VMX_CR4_FIXED0, 3174 CR4_VMXE_MASK); 3175 3176 if (f[FEAT_VMX_SECONDARY_CTLS] & VMX_SECONDARY_EXEC_TSC_SCALING) { 3177 /* TSC multiplier (0x2032). */ 3178 kvm_msr_entry_add(cpu, MSR_IA32_VMX_VMCS_ENUM, 0x32); 3179 } else { 3180 /* Preemption timer (0x482E). */ 3181 kvm_msr_entry_add(cpu, MSR_IA32_VMX_VMCS_ENUM, 0x2E); 3182 } 3183 } 3184 3185 static void kvm_msr_entry_add_perf(X86CPU *cpu, FeatureWordArray f) 3186 { 3187 uint64_t kvm_perf_cap = 3188 kvm_arch_get_supported_msr_feature(kvm_state, 3189 MSR_IA32_PERF_CAPABILITIES); 3190 3191 if (kvm_perf_cap) { 3192 kvm_msr_entry_add(cpu, MSR_IA32_PERF_CAPABILITIES, 3193 kvm_perf_cap & f[FEAT_PERF_CAPABILITIES]); 3194 } 3195 } 3196 3197 static int kvm_buf_set_msrs(X86CPU *cpu) 3198 { 3199 int ret = kvm_vcpu_ioctl(CPU(cpu), KVM_SET_MSRS, cpu->kvm_msr_buf); 3200 if (ret < 0) { 3201 return ret; 3202 } 3203 3204 if (ret < cpu->kvm_msr_buf->nmsrs) { 3205 struct kvm_msr_entry *e = &cpu->kvm_msr_buf->entries[ret]; 3206 error_report("error: failed to set MSR 0x%" PRIx32 " to 0x%" PRIx64, 3207 (uint32_t)e->index, (uint64_t)e->data); 3208 } 3209 3210 assert(ret == cpu->kvm_msr_buf->nmsrs); 3211 return 0; 3212 } 3213 3214 static void kvm_init_msrs(X86CPU *cpu) 3215 { 3216 CPUX86State *env = &cpu->env; 3217 3218 kvm_msr_buf_reset(cpu); 3219 if (has_msr_arch_capabs) { 3220 kvm_msr_entry_add(cpu, MSR_IA32_ARCH_CAPABILITIES, 3221 env->features[FEAT_ARCH_CAPABILITIES]); 3222 } 3223 3224 if (has_msr_core_capabs) { 3225 kvm_msr_entry_add(cpu, MSR_IA32_CORE_CAPABILITY, 3226 env->features[FEAT_CORE_CAPABILITY]); 3227 } 3228 3229 if (has_msr_perf_capabs && cpu->enable_pmu) { 3230 kvm_msr_entry_add_perf(cpu, env->features); 3231 } 3232 3233 if (has_msr_ucode_rev) { 3234 kvm_msr_entry_add(cpu, MSR_IA32_UCODE_REV, cpu->ucode_rev); 3235 } 3236 3237 /* 3238 * Older kernels do not include VMX MSRs in KVM_GET_MSR_INDEX_LIST, but 3239 * all kernels with MSR features should have them. 3240 */ 3241 if (kvm_feature_msrs && cpu_has_vmx(env)) { 3242 kvm_msr_entry_add_vmx(cpu, env->features); 3243 } 3244 3245 assert(kvm_buf_set_msrs(cpu) == 0); 3246 } 3247 3248 static int kvm_put_msrs(X86CPU *cpu, int level) 3249 { 3250 CPUX86State *env = &cpu->env; 3251 int i; 3252 3253 kvm_msr_buf_reset(cpu); 3254 3255 kvm_msr_entry_add(cpu, MSR_IA32_SYSENTER_CS, env->sysenter_cs); 3256 kvm_msr_entry_add(cpu, MSR_IA32_SYSENTER_ESP, env->sysenter_esp); 3257 kvm_msr_entry_add(cpu, MSR_IA32_SYSENTER_EIP, env->sysenter_eip); 3258 kvm_msr_entry_add(cpu, MSR_PAT, env->pat); 3259 if (has_msr_star) { 3260 kvm_msr_entry_add(cpu, MSR_STAR, env->star); 3261 } 3262 if (has_msr_hsave_pa) { 3263 kvm_msr_entry_add(cpu, MSR_VM_HSAVE_PA, env->vm_hsave); 3264 } 3265 if (has_msr_tsc_aux) { 3266 kvm_msr_entry_add(cpu, MSR_TSC_AUX, env->tsc_aux); 3267 } 3268 if (has_msr_tsc_adjust) { 3269 kvm_msr_entry_add(cpu, MSR_TSC_ADJUST, env->tsc_adjust); 3270 } 3271 if (has_msr_misc_enable) { 3272 kvm_msr_entry_add(cpu, MSR_IA32_MISC_ENABLE, 3273 env->msr_ia32_misc_enable); 3274 } 3275 if (has_msr_smbase) { 3276 kvm_msr_entry_add(cpu, MSR_IA32_SMBASE, env->smbase); 3277 } 3278 if (has_msr_smi_count) { 3279 kvm_msr_entry_add(cpu, MSR_SMI_COUNT, env->msr_smi_count); 3280 } 3281 if (has_msr_pkrs) { 3282 kvm_msr_entry_add(cpu, MSR_IA32_PKRS, env->pkrs); 3283 } 3284 if (has_msr_bndcfgs) { 3285 kvm_msr_entry_add(cpu, MSR_IA32_BNDCFGS, env->msr_bndcfgs); 3286 } 3287 if (has_msr_xss) { 3288 kvm_msr_entry_add(cpu, MSR_IA32_XSS, env->xss); 3289 } 3290 if (has_msr_umwait) { 3291 kvm_msr_entry_add(cpu, MSR_IA32_UMWAIT_CONTROL, env->umwait); 3292 } 3293 if (has_msr_spec_ctrl) { 3294 kvm_msr_entry_add(cpu, MSR_IA32_SPEC_CTRL, env->spec_ctrl); 3295 } 3296 if (has_tsc_scale_msr) { 3297 kvm_msr_entry_add(cpu, MSR_AMD64_TSC_RATIO, env->amd_tsc_scale_msr); 3298 } 3299 3300 if (has_msr_tsx_ctrl) { 3301 kvm_msr_entry_add(cpu, MSR_IA32_TSX_CTRL, env->tsx_ctrl); 3302 } 3303 if (has_msr_virt_ssbd) { 3304 kvm_msr_entry_add(cpu, MSR_VIRT_SSBD, env->virt_ssbd); 3305 } 3306 3307 #ifdef TARGET_X86_64 3308 if (lm_capable_kernel) { 3309 kvm_msr_entry_add(cpu, MSR_CSTAR, env->cstar); 3310 kvm_msr_entry_add(cpu, MSR_KERNELGSBASE, env->kernelgsbase); 3311 kvm_msr_entry_add(cpu, MSR_FMASK, env->fmask); 3312 kvm_msr_entry_add(cpu, MSR_LSTAR, env->lstar); 3313 } 3314 #endif 3315 3316 /* 3317 * The following MSRs have side effects on the guest or are too heavy 3318 * for normal writeback. Limit them to reset or full state updates. 3319 */ 3320 if (level >= KVM_PUT_RESET_STATE) { 3321 kvm_msr_entry_add(cpu, MSR_IA32_TSC, env->tsc); 3322 kvm_msr_entry_add(cpu, MSR_KVM_SYSTEM_TIME, env->system_time_msr); 3323 kvm_msr_entry_add(cpu, MSR_KVM_WALL_CLOCK, env->wall_clock_msr); 3324 if (env->features[FEAT_KVM] & (1 << KVM_FEATURE_ASYNC_PF_INT)) { 3325 kvm_msr_entry_add(cpu, MSR_KVM_ASYNC_PF_INT, env->async_pf_int_msr); 3326 } 3327 if (env->features[FEAT_KVM] & (1 << KVM_FEATURE_ASYNC_PF)) { 3328 kvm_msr_entry_add(cpu, MSR_KVM_ASYNC_PF_EN, env->async_pf_en_msr); 3329 } 3330 if (env->features[FEAT_KVM] & (1 << KVM_FEATURE_PV_EOI)) { 3331 kvm_msr_entry_add(cpu, MSR_KVM_PV_EOI_EN, env->pv_eoi_en_msr); 3332 } 3333 if (env->features[FEAT_KVM] & (1 << KVM_FEATURE_STEAL_TIME)) { 3334 kvm_msr_entry_add(cpu, MSR_KVM_STEAL_TIME, env->steal_time_msr); 3335 } 3336 3337 if (env->features[FEAT_KVM] & (1 << KVM_FEATURE_POLL_CONTROL)) { 3338 kvm_msr_entry_add(cpu, MSR_KVM_POLL_CONTROL, env->poll_control_msr); 3339 } 3340 3341 if (has_architectural_pmu_version > 0) { 3342 if (has_architectural_pmu_version > 1) { 3343 /* Stop the counter. */ 3344 kvm_msr_entry_add(cpu, MSR_CORE_PERF_FIXED_CTR_CTRL, 0); 3345 kvm_msr_entry_add(cpu, MSR_CORE_PERF_GLOBAL_CTRL, 0); 3346 } 3347 3348 /* Set the counter values. */ 3349 for (i = 0; i < num_architectural_pmu_fixed_counters; i++) { 3350 kvm_msr_entry_add(cpu, MSR_CORE_PERF_FIXED_CTR0 + i, 3351 env->msr_fixed_counters[i]); 3352 } 3353 for (i = 0; i < num_architectural_pmu_gp_counters; i++) { 3354 kvm_msr_entry_add(cpu, MSR_P6_PERFCTR0 + i, 3355 env->msr_gp_counters[i]); 3356 kvm_msr_entry_add(cpu, MSR_P6_EVNTSEL0 + i, 3357 env->msr_gp_evtsel[i]); 3358 } 3359 if (has_architectural_pmu_version > 1) { 3360 kvm_msr_entry_add(cpu, MSR_CORE_PERF_GLOBAL_STATUS, 3361 env->msr_global_status); 3362 kvm_msr_entry_add(cpu, MSR_CORE_PERF_GLOBAL_OVF_CTRL, 3363 env->msr_global_ovf_ctrl); 3364 3365 /* Now start the PMU. */ 3366 kvm_msr_entry_add(cpu, MSR_CORE_PERF_FIXED_CTR_CTRL, 3367 env->msr_fixed_ctr_ctrl); 3368 kvm_msr_entry_add(cpu, MSR_CORE_PERF_GLOBAL_CTRL, 3369 env->msr_global_ctrl); 3370 } 3371 } 3372 /* 3373 * Hyper-V partition-wide MSRs: to avoid clearing them on cpu hot-add, 3374 * only sync them to KVM on the first cpu 3375 */ 3376 if (current_cpu == first_cpu) { 3377 if (has_msr_hv_hypercall) { 3378 kvm_msr_entry_add(cpu, HV_X64_MSR_GUEST_OS_ID, 3379 env->msr_hv_guest_os_id); 3380 kvm_msr_entry_add(cpu, HV_X64_MSR_HYPERCALL, 3381 env->msr_hv_hypercall); 3382 } 3383 if (hyperv_feat_enabled(cpu, HYPERV_FEAT_TIME)) { 3384 kvm_msr_entry_add(cpu, HV_X64_MSR_REFERENCE_TSC, 3385 env->msr_hv_tsc); 3386 } 3387 if (hyperv_feat_enabled(cpu, HYPERV_FEAT_REENLIGHTENMENT)) { 3388 kvm_msr_entry_add(cpu, HV_X64_MSR_REENLIGHTENMENT_CONTROL, 3389 env->msr_hv_reenlightenment_control); 3390 kvm_msr_entry_add(cpu, HV_X64_MSR_TSC_EMULATION_CONTROL, 3391 env->msr_hv_tsc_emulation_control); 3392 kvm_msr_entry_add(cpu, HV_X64_MSR_TSC_EMULATION_STATUS, 3393 env->msr_hv_tsc_emulation_status); 3394 } 3395 #ifdef CONFIG_SYNDBG 3396 if (hyperv_feat_enabled(cpu, HYPERV_FEAT_SYNDBG) && 3397 has_msr_hv_syndbg_options) { 3398 kvm_msr_entry_add(cpu, HV_X64_MSR_SYNDBG_OPTIONS, 3399 hyperv_syndbg_query_options()); 3400 } 3401 #endif 3402 } 3403 if (hyperv_feat_enabled(cpu, HYPERV_FEAT_VAPIC)) { 3404 kvm_msr_entry_add(cpu, HV_X64_MSR_APIC_ASSIST_PAGE, 3405 env->msr_hv_vapic); 3406 } 3407 if (has_msr_hv_crash) { 3408 int j; 3409 3410 for (j = 0; j < HV_CRASH_PARAMS; j++) 3411 kvm_msr_entry_add(cpu, HV_X64_MSR_CRASH_P0 + j, 3412 env->msr_hv_crash_params[j]); 3413 3414 kvm_msr_entry_add(cpu, HV_X64_MSR_CRASH_CTL, HV_CRASH_CTL_NOTIFY); 3415 } 3416 if (has_msr_hv_runtime) { 3417 kvm_msr_entry_add(cpu, HV_X64_MSR_VP_RUNTIME, env->msr_hv_runtime); 3418 } 3419 if (hyperv_feat_enabled(cpu, HYPERV_FEAT_VPINDEX) 3420 && hv_vpindex_settable) { 3421 kvm_msr_entry_add(cpu, HV_X64_MSR_VP_INDEX, 3422 hyperv_vp_index(CPU(cpu))); 3423 } 3424 if (hyperv_feat_enabled(cpu, HYPERV_FEAT_SYNIC)) { 3425 int j; 3426 3427 kvm_msr_entry_add(cpu, HV_X64_MSR_SVERSION, HV_SYNIC_VERSION); 3428 3429 kvm_msr_entry_add(cpu, HV_X64_MSR_SCONTROL, 3430 env->msr_hv_synic_control); 3431 kvm_msr_entry_add(cpu, HV_X64_MSR_SIEFP, 3432 env->msr_hv_synic_evt_page); 3433 kvm_msr_entry_add(cpu, HV_X64_MSR_SIMP, 3434 env->msr_hv_synic_msg_page); 3435 3436 for (j = 0; j < ARRAY_SIZE(env->msr_hv_synic_sint); j++) { 3437 kvm_msr_entry_add(cpu, HV_X64_MSR_SINT0 + j, 3438 env->msr_hv_synic_sint[j]); 3439 } 3440 } 3441 if (has_msr_hv_stimer) { 3442 int j; 3443 3444 for (j = 0; j < ARRAY_SIZE(env->msr_hv_stimer_config); j++) { 3445 kvm_msr_entry_add(cpu, HV_X64_MSR_STIMER0_CONFIG + j * 2, 3446 env->msr_hv_stimer_config[j]); 3447 } 3448 3449 for (j = 0; j < ARRAY_SIZE(env->msr_hv_stimer_count); j++) { 3450 kvm_msr_entry_add(cpu, HV_X64_MSR_STIMER0_COUNT + j * 2, 3451 env->msr_hv_stimer_count[j]); 3452 } 3453 } 3454 if (env->features[FEAT_1_EDX] & CPUID_MTRR) { 3455 uint64_t phys_mask = MAKE_64BIT_MASK(0, cpu->phys_bits); 3456 3457 kvm_msr_entry_add(cpu, MSR_MTRRdefType, env->mtrr_deftype); 3458 kvm_msr_entry_add(cpu, MSR_MTRRfix64K_00000, env->mtrr_fixed[0]); 3459 kvm_msr_entry_add(cpu, MSR_MTRRfix16K_80000, env->mtrr_fixed[1]); 3460 kvm_msr_entry_add(cpu, MSR_MTRRfix16K_A0000, env->mtrr_fixed[2]); 3461 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_C0000, env->mtrr_fixed[3]); 3462 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_C8000, env->mtrr_fixed[4]); 3463 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_D0000, env->mtrr_fixed[5]); 3464 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_D8000, env->mtrr_fixed[6]); 3465 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_E0000, env->mtrr_fixed[7]); 3466 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_E8000, env->mtrr_fixed[8]); 3467 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_F0000, env->mtrr_fixed[9]); 3468 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_F8000, env->mtrr_fixed[10]); 3469 for (i = 0; i < MSR_MTRRcap_VCNT; i++) { 3470 /* The CPU GPs if we write to a bit above the physical limit of 3471 * the host CPU (and KVM emulates that) 3472 */ 3473 uint64_t mask = env->mtrr_var[i].mask; 3474 mask &= phys_mask; 3475 3476 kvm_msr_entry_add(cpu, MSR_MTRRphysBase(i), 3477 env->mtrr_var[i].base); 3478 kvm_msr_entry_add(cpu, MSR_MTRRphysMask(i), mask); 3479 } 3480 } 3481 if (env->features[FEAT_7_0_EBX] & CPUID_7_0_EBX_INTEL_PT) { 3482 int addr_num = kvm_arch_get_supported_cpuid(kvm_state, 3483 0x14, 1, R_EAX) & 0x7; 3484 3485 kvm_msr_entry_add(cpu, MSR_IA32_RTIT_CTL, 3486 env->msr_rtit_ctrl); 3487 kvm_msr_entry_add(cpu, MSR_IA32_RTIT_STATUS, 3488 env->msr_rtit_status); 3489 kvm_msr_entry_add(cpu, MSR_IA32_RTIT_OUTPUT_BASE, 3490 env->msr_rtit_output_base); 3491 kvm_msr_entry_add(cpu, MSR_IA32_RTIT_OUTPUT_MASK, 3492 env->msr_rtit_output_mask); 3493 kvm_msr_entry_add(cpu, MSR_IA32_RTIT_CR3_MATCH, 3494 env->msr_rtit_cr3_match); 3495 for (i = 0; i < addr_num; i++) { 3496 kvm_msr_entry_add(cpu, MSR_IA32_RTIT_ADDR0_A + i, 3497 env->msr_rtit_addrs[i]); 3498 } 3499 } 3500 3501 if (env->features[FEAT_7_0_ECX] & CPUID_7_0_ECX_SGX_LC) { 3502 kvm_msr_entry_add(cpu, MSR_IA32_SGXLEPUBKEYHASH0, 3503 env->msr_ia32_sgxlepubkeyhash[0]); 3504 kvm_msr_entry_add(cpu, MSR_IA32_SGXLEPUBKEYHASH1, 3505 env->msr_ia32_sgxlepubkeyhash[1]); 3506 kvm_msr_entry_add(cpu, MSR_IA32_SGXLEPUBKEYHASH2, 3507 env->msr_ia32_sgxlepubkeyhash[2]); 3508 kvm_msr_entry_add(cpu, MSR_IA32_SGXLEPUBKEYHASH3, 3509 env->msr_ia32_sgxlepubkeyhash[3]); 3510 } 3511 3512 if (env->features[FEAT_XSAVE] & CPUID_D_1_EAX_XFD) { 3513 kvm_msr_entry_add(cpu, MSR_IA32_XFD, 3514 env->msr_xfd); 3515 kvm_msr_entry_add(cpu, MSR_IA32_XFD_ERR, 3516 env->msr_xfd_err); 3517 } 3518 3519 if (kvm_enabled() && cpu->enable_pmu && 3520 (env->features[FEAT_7_0_EDX] & CPUID_7_0_EDX_ARCH_LBR)) { 3521 uint64_t depth; 3522 int ret; 3523 3524 /* 3525 * Only migrate Arch LBR states when the host Arch LBR depth 3526 * equals that of source guest's, this is to avoid mismatch 3527 * of guest/host config for the msr hence avoid unexpected 3528 * misbehavior. 3529 */ 3530 ret = kvm_get_one_msr(cpu, MSR_ARCH_LBR_DEPTH, &depth); 3531 3532 if (ret == 1 && !!depth && depth == env->msr_lbr_depth) { 3533 kvm_msr_entry_add(cpu, MSR_ARCH_LBR_CTL, env->msr_lbr_ctl); 3534 kvm_msr_entry_add(cpu, MSR_ARCH_LBR_DEPTH, env->msr_lbr_depth); 3535 3536 for (i = 0; i < ARCH_LBR_NR_ENTRIES; i++) { 3537 if (!env->lbr_records[i].from) { 3538 continue; 3539 } 3540 kvm_msr_entry_add(cpu, MSR_ARCH_LBR_FROM_0 + i, 3541 env->lbr_records[i].from); 3542 kvm_msr_entry_add(cpu, MSR_ARCH_LBR_TO_0 + i, 3543 env->lbr_records[i].to); 3544 kvm_msr_entry_add(cpu, MSR_ARCH_LBR_INFO_0 + i, 3545 env->lbr_records[i].info); 3546 } 3547 } 3548 } 3549 3550 /* Note: MSR_IA32_FEATURE_CONTROL is written separately, see 3551 * kvm_put_msr_feature_control. */ 3552 } 3553 3554 if (env->mcg_cap) { 3555 kvm_msr_entry_add(cpu, MSR_MCG_STATUS, env->mcg_status); 3556 kvm_msr_entry_add(cpu, MSR_MCG_CTL, env->mcg_ctl); 3557 if (has_msr_mcg_ext_ctl) { 3558 kvm_msr_entry_add(cpu, MSR_MCG_EXT_CTL, env->mcg_ext_ctl); 3559 } 3560 for (i = 0; i < (env->mcg_cap & 0xff) * 4; i++) { 3561 kvm_msr_entry_add(cpu, MSR_MC0_CTL + i, env->mce_banks[i]); 3562 } 3563 } 3564 3565 return kvm_buf_set_msrs(cpu); 3566 } 3567 3568 3569 static int kvm_get_xsave(X86CPU *cpu) 3570 { 3571 CPUX86State *env = &cpu->env; 3572 void *xsave = env->xsave_buf; 3573 int type, ret; 3574 3575 type = has_xsave2 ? KVM_GET_XSAVE2 : KVM_GET_XSAVE; 3576 ret = kvm_vcpu_ioctl(CPU(cpu), type, xsave); 3577 if (ret < 0) { 3578 return ret; 3579 } 3580 x86_cpu_xrstor_all_areas(cpu, xsave, env->xsave_buf_len); 3581 3582 return 0; 3583 } 3584 3585 static int kvm_get_xcrs(X86CPU *cpu) 3586 { 3587 CPUX86State *env = &cpu->env; 3588 int i, ret; 3589 struct kvm_xcrs xcrs; 3590 3591 if (!has_xcrs) { 3592 return 0; 3593 } 3594 3595 ret = kvm_vcpu_ioctl(CPU(cpu), KVM_GET_XCRS, &xcrs); 3596 if (ret < 0) { 3597 return ret; 3598 } 3599 3600 for (i = 0; i < xcrs.nr_xcrs; i++) { 3601 /* Only support xcr0 now */ 3602 if (xcrs.xcrs[i].xcr == 0) { 3603 env->xcr0 = xcrs.xcrs[i].value; 3604 break; 3605 } 3606 } 3607 return 0; 3608 } 3609 3610 static int kvm_get_sregs(X86CPU *cpu) 3611 { 3612 CPUX86State *env = &cpu->env; 3613 struct kvm_sregs sregs; 3614 int ret; 3615 3616 ret = kvm_vcpu_ioctl(CPU(cpu), KVM_GET_SREGS, &sregs); 3617 if (ret < 0) { 3618 return ret; 3619 } 3620 3621 /* 3622 * The interrupt_bitmap is ignored because KVM_GET_SREGS is 3623 * always preceded by KVM_GET_VCPU_EVENTS. 3624 */ 3625 3626 get_seg(&env->segs[R_CS], &sregs.cs); 3627 get_seg(&env->segs[R_DS], &sregs.ds); 3628 get_seg(&env->segs[R_ES], &sregs.es); 3629 get_seg(&env->segs[R_FS], &sregs.fs); 3630 get_seg(&env->segs[R_GS], &sregs.gs); 3631 get_seg(&env->segs[R_SS], &sregs.ss); 3632 3633 get_seg(&env->tr, &sregs.tr); 3634 get_seg(&env->ldt, &sregs.ldt); 3635 3636 env->idt.limit = sregs.idt.limit; 3637 env->idt.base = sregs.idt.base; 3638 env->gdt.limit = sregs.gdt.limit; 3639 env->gdt.base = sregs.gdt.base; 3640 3641 env->cr[0] = sregs.cr0; 3642 env->cr[2] = sregs.cr2; 3643 env->cr[3] = sregs.cr3; 3644 env->cr[4] = sregs.cr4; 3645 3646 env->efer = sregs.efer; 3647 if (sev_es_enabled() && env->efer & MSR_EFER_LME && 3648 env->cr[0] & CR0_PG_MASK) { 3649 env->efer |= MSR_EFER_LMA; 3650 } 3651 3652 /* changes to apic base and cr8/tpr are read back via kvm_arch_post_run */ 3653 x86_update_hflags(env); 3654 3655 return 0; 3656 } 3657 3658 static int kvm_get_sregs2(X86CPU *cpu) 3659 { 3660 CPUX86State *env = &cpu->env; 3661 struct kvm_sregs2 sregs; 3662 int i, ret; 3663 3664 ret = kvm_vcpu_ioctl(CPU(cpu), KVM_GET_SREGS2, &sregs); 3665 if (ret < 0) { 3666 return ret; 3667 } 3668 3669 get_seg(&env->segs[R_CS], &sregs.cs); 3670 get_seg(&env->segs[R_DS], &sregs.ds); 3671 get_seg(&env->segs[R_ES], &sregs.es); 3672 get_seg(&env->segs[R_FS], &sregs.fs); 3673 get_seg(&env->segs[R_GS], &sregs.gs); 3674 get_seg(&env->segs[R_SS], &sregs.ss); 3675 3676 get_seg(&env->tr, &sregs.tr); 3677 get_seg(&env->ldt, &sregs.ldt); 3678 3679 env->idt.limit = sregs.idt.limit; 3680 env->idt.base = sregs.idt.base; 3681 env->gdt.limit = sregs.gdt.limit; 3682 env->gdt.base = sregs.gdt.base; 3683 3684 env->cr[0] = sregs.cr0; 3685 env->cr[2] = sregs.cr2; 3686 env->cr[3] = sregs.cr3; 3687 env->cr[4] = sregs.cr4; 3688 3689 env->efer = sregs.efer; 3690 if (sev_es_enabled() && env->efer & MSR_EFER_LME && 3691 env->cr[0] & CR0_PG_MASK) { 3692 env->efer |= MSR_EFER_LMA; 3693 } 3694 3695 env->pdptrs_valid = sregs.flags & KVM_SREGS2_FLAGS_PDPTRS_VALID; 3696 3697 if (env->pdptrs_valid) { 3698 for (i = 0; i < 4; i++) { 3699 env->pdptrs[i] = sregs.pdptrs[i]; 3700 } 3701 } 3702 3703 /* changes to apic base and cr8/tpr are read back via kvm_arch_post_run */ 3704 x86_update_hflags(env); 3705 3706 return 0; 3707 } 3708 3709 static int kvm_get_msrs(X86CPU *cpu) 3710 { 3711 CPUX86State *env = &cpu->env; 3712 struct kvm_msr_entry *msrs = cpu->kvm_msr_buf->entries; 3713 int ret, i; 3714 uint64_t mtrr_top_bits; 3715 3716 kvm_msr_buf_reset(cpu); 3717 3718 kvm_msr_entry_add(cpu, MSR_IA32_SYSENTER_CS, 0); 3719 kvm_msr_entry_add(cpu, MSR_IA32_SYSENTER_ESP, 0); 3720 kvm_msr_entry_add(cpu, MSR_IA32_SYSENTER_EIP, 0); 3721 kvm_msr_entry_add(cpu, MSR_PAT, 0); 3722 if (has_msr_star) { 3723 kvm_msr_entry_add(cpu, MSR_STAR, 0); 3724 } 3725 if (has_msr_hsave_pa) { 3726 kvm_msr_entry_add(cpu, MSR_VM_HSAVE_PA, 0); 3727 } 3728 if (has_msr_tsc_aux) { 3729 kvm_msr_entry_add(cpu, MSR_TSC_AUX, 0); 3730 } 3731 if (has_msr_tsc_adjust) { 3732 kvm_msr_entry_add(cpu, MSR_TSC_ADJUST, 0); 3733 } 3734 if (has_msr_tsc_deadline) { 3735 kvm_msr_entry_add(cpu, MSR_IA32_TSCDEADLINE, 0); 3736 } 3737 if (has_msr_misc_enable) { 3738 kvm_msr_entry_add(cpu, MSR_IA32_MISC_ENABLE, 0); 3739 } 3740 if (has_msr_smbase) { 3741 kvm_msr_entry_add(cpu, MSR_IA32_SMBASE, 0); 3742 } 3743 if (has_msr_smi_count) { 3744 kvm_msr_entry_add(cpu, MSR_SMI_COUNT, 0); 3745 } 3746 if (has_msr_feature_control) { 3747 kvm_msr_entry_add(cpu, MSR_IA32_FEATURE_CONTROL, 0); 3748 } 3749 if (has_msr_pkrs) { 3750 kvm_msr_entry_add(cpu, MSR_IA32_PKRS, 0); 3751 } 3752 if (has_msr_bndcfgs) { 3753 kvm_msr_entry_add(cpu, MSR_IA32_BNDCFGS, 0); 3754 } 3755 if (has_msr_xss) { 3756 kvm_msr_entry_add(cpu, MSR_IA32_XSS, 0); 3757 } 3758 if (has_msr_umwait) { 3759 kvm_msr_entry_add(cpu, MSR_IA32_UMWAIT_CONTROL, 0); 3760 } 3761 if (has_msr_spec_ctrl) { 3762 kvm_msr_entry_add(cpu, MSR_IA32_SPEC_CTRL, 0); 3763 } 3764 if (has_tsc_scale_msr) { 3765 kvm_msr_entry_add(cpu, MSR_AMD64_TSC_RATIO, 0); 3766 } 3767 3768 if (has_msr_tsx_ctrl) { 3769 kvm_msr_entry_add(cpu, MSR_IA32_TSX_CTRL, 0); 3770 } 3771 if (has_msr_virt_ssbd) { 3772 kvm_msr_entry_add(cpu, MSR_VIRT_SSBD, 0); 3773 } 3774 if (!env->tsc_valid) { 3775 kvm_msr_entry_add(cpu, MSR_IA32_TSC, 0); 3776 env->tsc_valid = !runstate_is_running(); 3777 } 3778 3779 #ifdef TARGET_X86_64 3780 if (lm_capable_kernel) { 3781 kvm_msr_entry_add(cpu, MSR_CSTAR, 0); 3782 kvm_msr_entry_add(cpu, MSR_KERNELGSBASE, 0); 3783 kvm_msr_entry_add(cpu, MSR_FMASK, 0); 3784 kvm_msr_entry_add(cpu, MSR_LSTAR, 0); 3785 } 3786 #endif 3787 kvm_msr_entry_add(cpu, MSR_KVM_SYSTEM_TIME, 0); 3788 kvm_msr_entry_add(cpu, MSR_KVM_WALL_CLOCK, 0); 3789 if (env->features[FEAT_KVM] & (1 << KVM_FEATURE_ASYNC_PF_INT)) { 3790 kvm_msr_entry_add(cpu, MSR_KVM_ASYNC_PF_INT, 0); 3791 } 3792 if (env->features[FEAT_KVM] & (1 << KVM_FEATURE_ASYNC_PF)) { 3793 kvm_msr_entry_add(cpu, MSR_KVM_ASYNC_PF_EN, 0); 3794 } 3795 if (env->features[FEAT_KVM] & (1 << KVM_FEATURE_PV_EOI)) { 3796 kvm_msr_entry_add(cpu, MSR_KVM_PV_EOI_EN, 0); 3797 } 3798 if (env->features[FEAT_KVM] & (1 << KVM_FEATURE_STEAL_TIME)) { 3799 kvm_msr_entry_add(cpu, MSR_KVM_STEAL_TIME, 0); 3800 } 3801 if (env->features[FEAT_KVM] & (1 << KVM_FEATURE_POLL_CONTROL)) { 3802 kvm_msr_entry_add(cpu, MSR_KVM_POLL_CONTROL, 1); 3803 } 3804 if (has_architectural_pmu_version > 0) { 3805 if (has_architectural_pmu_version > 1) { 3806 kvm_msr_entry_add(cpu, MSR_CORE_PERF_FIXED_CTR_CTRL, 0); 3807 kvm_msr_entry_add(cpu, MSR_CORE_PERF_GLOBAL_CTRL, 0); 3808 kvm_msr_entry_add(cpu, MSR_CORE_PERF_GLOBAL_STATUS, 0); 3809 kvm_msr_entry_add(cpu, MSR_CORE_PERF_GLOBAL_OVF_CTRL, 0); 3810 } 3811 for (i = 0; i < num_architectural_pmu_fixed_counters; i++) { 3812 kvm_msr_entry_add(cpu, MSR_CORE_PERF_FIXED_CTR0 + i, 0); 3813 } 3814 for (i = 0; i < num_architectural_pmu_gp_counters; i++) { 3815 kvm_msr_entry_add(cpu, MSR_P6_PERFCTR0 + i, 0); 3816 kvm_msr_entry_add(cpu, MSR_P6_EVNTSEL0 + i, 0); 3817 } 3818 } 3819 3820 if (env->mcg_cap) { 3821 kvm_msr_entry_add(cpu, MSR_MCG_STATUS, 0); 3822 kvm_msr_entry_add(cpu, MSR_MCG_CTL, 0); 3823 if (has_msr_mcg_ext_ctl) { 3824 kvm_msr_entry_add(cpu, MSR_MCG_EXT_CTL, 0); 3825 } 3826 for (i = 0; i < (env->mcg_cap & 0xff) * 4; i++) { 3827 kvm_msr_entry_add(cpu, MSR_MC0_CTL + i, 0); 3828 } 3829 } 3830 3831 if (has_msr_hv_hypercall) { 3832 kvm_msr_entry_add(cpu, HV_X64_MSR_HYPERCALL, 0); 3833 kvm_msr_entry_add(cpu, HV_X64_MSR_GUEST_OS_ID, 0); 3834 } 3835 if (hyperv_feat_enabled(cpu, HYPERV_FEAT_VAPIC)) { 3836 kvm_msr_entry_add(cpu, HV_X64_MSR_APIC_ASSIST_PAGE, 0); 3837 } 3838 if (hyperv_feat_enabled(cpu, HYPERV_FEAT_TIME)) { 3839 kvm_msr_entry_add(cpu, HV_X64_MSR_REFERENCE_TSC, 0); 3840 } 3841 if (hyperv_feat_enabled(cpu, HYPERV_FEAT_REENLIGHTENMENT)) { 3842 kvm_msr_entry_add(cpu, HV_X64_MSR_REENLIGHTENMENT_CONTROL, 0); 3843 kvm_msr_entry_add(cpu, HV_X64_MSR_TSC_EMULATION_CONTROL, 0); 3844 kvm_msr_entry_add(cpu, HV_X64_MSR_TSC_EMULATION_STATUS, 0); 3845 } 3846 if (has_msr_hv_syndbg_options) { 3847 kvm_msr_entry_add(cpu, HV_X64_MSR_SYNDBG_OPTIONS, 0); 3848 } 3849 if (has_msr_hv_crash) { 3850 int j; 3851 3852 for (j = 0; j < HV_CRASH_PARAMS; j++) { 3853 kvm_msr_entry_add(cpu, HV_X64_MSR_CRASH_P0 + j, 0); 3854 } 3855 } 3856 if (has_msr_hv_runtime) { 3857 kvm_msr_entry_add(cpu, HV_X64_MSR_VP_RUNTIME, 0); 3858 } 3859 if (hyperv_feat_enabled(cpu, HYPERV_FEAT_SYNIC)) { 3860 uint32_t msr; 3861 3862 kvm_msr_entry_add(cpu, HV_X64_MSR_SCONTROL, 0); 3863 kvm_msr_entry_add(cpu, HV_X64_MSR_SIEFP, 0); 3864 kvm_msr_entry_add(cpu, HV_X64_MSR_SIMP, 0); 3865 for (msr = HV_X64_MSR_SINT0; msr <= HV_X64_MSR_SINT15; msr++) { 3866 kvm_msr_entry_add(cpu, msr, 0); 3867 } 3868 } 3869 if (has_msr_hv_stimer) { 3870 uint32_t msr; 3871 3872 for (msr = HV_X64_MSR_STIMER0_CONFIG; msr <= HV_X64_MSR_STIMER3_COUNT; 3873 msr++) { 3874 kvm_msr_entry_add(cpu, msr, 0); 3875 } 3876 } 3877 if (env->features[FEAT_1_EDX] & CPUID_MTRR) { 3878 kvm_msr_entry_add(cpu, MSR_MTRRdefType, 0); 3879 kvm_msr_entry_add(cpu, MSR_MTRRfix64K_00000, 0); 3880 kvm_msr_entry_add(cpu, MSR_MTRRfix16K_80000, 0); 3881 kvm_msr_entry_add(cpu, MSR_MTRRfix16K_A0000, 0); 3882 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_C0000, 0); 3883 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_C8000, 0); 3884 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_D0000, 0); 3885 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_D8000, 0); 3886 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_E0000, 0); 3887 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_E8000, 0); 3888 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_F0000, 0); 3889 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_F8000, 0); 3890 for (i = 0; i < MSR_MTRRcap_VCNT; i++) { 3891 kvm_msr_entry_add(cpu, MSR_MTRRphysBase(i), 0); 3892 kvm_msr_entry_add(cpu, MSR_MTRRphysMask(i), 0); 3893 } 3894 } 3895 3896 if (env->features[FEAT_7_0_EBX] & CPUID_7_0_EBX_INTEL_PT) { 3897 int addr_num = 3898 kvm_arch_get_supported_cpuid(kvm_state, 0x14, 1, R_EAX) & 0x7; 3899 3900 kvm_msr_entry_add(cpu, MSR_IA32_RTIT_CTL, 0); 3901 kvm_msr_entry_add(cpu, MSR_IA32_RTIT_STATUS, 0); 3902 kvm_msr_entry_add(cpu, MSR_IA32_RTIT_OUTPUT_BASE, 0); 3903 kvm_msr_entry_add(cpu, MSR_IA32_RTIT_OUTPUT_MASK, 0); 3904 kvm_msr_entry_add(cpu, MSR_IA32_RTIT_CR3_MATCH, 0); 3905 for (i = 0; i < addr_num; i++) { 3906 kvm_msr_entry_add(cpu, MSR_IA32_RTIT_ADDR0_A + i, 0); 3907 } 3908 } 3909 3910 if (env->features[FEAT_7_0_ECX] & CPUID_7_0_ECX_SGX_LC) { 3911 kvm_msr_entry_add(cpu, MSR_IA32_SGXLEPUBKEYHASH0, 0); 3912 kvm_msr_entry_add(cpu, MSR_IA32_SGXLEPUBKEYHASH1, 0); 3913 kvm_msr_entry_add(cpu, MSR_IA32_SGXLEPUBKEYHASH2, 0); 3914 kvm_msr_entry_add(cpu, MSR_IA32_SGXLEPUBKEYHASH3, 0); 3915 } 3916 3917 if (env->features[FEAT_XSAVE] & CPUID_D_1_EAX_XFD) { 3918 kvm_msr_entry_add(cpu, MSR_IA32_XFD, 0); 3919 kvm_msr_entry_add(cpu, MSR_IA32_XFD_ERR, 0); 3920 } 3921 3922 if (kvm_enabled() && cpu->enable_pmu && 3923 (env->features[FEAT_7_0_EDX] & CPUID_7_0_EDX_ARCH_LBR)) { 3924 uint64_t depth; 3925 3926 ret = kvm_get_one_msr(cpu, MSR_ARCH_LBR_DEPTH, &depth); 3927 if (ret == 1 && depth == ARCH_LBR_NR_ENTRIES) { 3928 kvm_msr_entry_add(cpu, MSR_ARCH_LBR_CTL, 0); 3929 kvm_msr_entry_add(cpu, MSR_ARCH_LBR_DEPTH, 0); 3930 3931 for (i = 0; i < ARCH_LBR_NR_ENTRIES; i++) { 3932 kvm_msr_entry_add(cpu, MSR_ARCH_LBR_FROM_0 + i, 0); 3933 kvm_msr_entry_add(cpu, MSR_ARCH_LBR_TO_0 + i, 0); 3934 kvm_msr_entry_add(cpu, MSR_ARCH_LBR_INFO_0 + i, 0); 3935 } 3936 } 3937 } 3938 3939 ret = kvm_vcpu_ioctl(CPU(cpu), KVM_GET_MSRS, cpu->kvm_msr_buf); 3940 if (ret < 0) { 3941 return ret; 3942 } 3943 3944 if (ret < cpu->kvm_msr_buf->nmsrs) { 3945 struct kvm_msr_entry *e = &cpu->kvm_msr_buf->entries[ret]; 3946 error_report("error: failed to get MSR 0x%" PRIx32, 3947 (uint32_t)e->index); 3948 } 3949 3950 assert(ret == cpu->kvm_msr_buf->nmsrs); 3951 /* 3952 * MTRR masks: Each mask consists of 5 parts 3953 * a 10..0: must be zero 3954 * b 11 : valid bit 3955 * c n-1.12: actual mask bits 3956 * d 51..n: reserved must be zero 3957 * e 63.52: reserved must be zero 3958 * 3959 * 'n' is the number of physical bits supported by the CPU and is 3960 * apparently always <= 52. We know our 'n' but don't know what 3961 * the destinations 'n' is; it might be smaller, in which case 3962 * it masks (c) on loading. It might be larger, in which case 3963 * we fill 'd' so that d..c is consistent irrespetive of the 'n' 3964 * we're migrating to. 3965 */ 3966 3967 if (cpu->fill_mtrr_mask) { 3968 QEMU_BUILD_BUG_ON(TARGET_PHYS_ADDR_SPACE_BITS > 52); 3969 assert(cpu->phys_bits <= TARGET_PHYS_ADDR_SPACE_BITS); 3970 mtrr_top_bits = MAKE_64BIT_MASK(cpu->phys_bits, 52 - cpu->phys_bits); 3971 } else { 3972 mtrr_top_bits = 0; 3973 } 3974 3975 for (i = 0; i < ret; i++) { 3976 uint32_t index = msrs[i].index; 3977 switch (index) { 3978 case MSR_IA32_SYSENTER_CS: 3979 env->sysenter_cs = msrs[i].data; 3980 break; 3981 case MSR_IA32_SYSENTER_ESP: 3982 env->sysenter_esp = msrs[i].data; 3983 break; 3984 case MSR_IA32_SYSENTER_EIP: 3985 env->sysenter_eip = msrs[i].data; 3986 break; 3987 case MSR_PAT: 3988 env->pat = msrs[i].data; 3989 break; 3990 case MSR_STAR: 3991 env->star = msrs[i].data; 3992 break; 3993 #ifdef TARGET_X86_64 3994 case MSR_CSTAR: 3995 env->cstar = msrs[i].data; 3996 break; 3997 case MSR_KERNELGSBASE: 3998 env->kernelgsbase = msrs[i].data; 3999 break; 4000 case MSR_FMASK: 4001 env->fmask = msrs[i].data; 4002 break; 4003 case MSR_LSTAR: 4004 env->lstar = msrs[i].data; 4005 break; 4006 #endif 4007 case MSR_IA32_TSC: 4008 env->tsc = msrs[i].data; 4009 break; 4010 case MSR_TSC_AUX: 4011 env->tsc_aux = msrs[i].data; 4012 break; 4013 case MSR_TSC_ADJUST: 4014 env->tsc_adjust = msrs[i].data; 4015 break; 4016 case MSR_IA32_TSCDEADLINE: 4017 env->tsc_deadline = msrs[i].data; 4018 break; 4019 case MSR_VM_HSAVE_PA: 4020 env->vm_hsave = msrs[i].data; 4021 break; 4022 case MSR_KVM_SYSTEM_TIME: 4023 env->system_time_msr = msrs[i].data; 4024 break; 4025 case MSR_KVM_WALL_CLOCK: 4026 env->wall_clock_msr = msrs[i].data; 4027 break; 4028 case MSR_MCG_STATUS: 4029 env->mcg_status = msrs[i].data; 4030 break; 4031 case MSR_MCG_CTL: 4032 env->mcg_ctl = msrs[i].data; 4033 break; 4034 case MSR_MCG_EXT_CTL: 4035 env->mcg_ext_ctl = msrs[i].data; 4036 break; 4037 case MSR_IA32_MISC_ENABLE: 4038 env->msr_ia32_misc_enable = msrs[i].data; 4039 break; 4040 case MSR_IA32_SMBASE: 4041 env->smbase = msrs[i].data; 4042 break; 4043 case MSR_SMI_COUNT: 4044 env->msr_smi_count = msrs[i].data; 4045 break; 4046 case MSR_IA32_FEATURE_CONTROL: 4047 env->msr_ia32_feature_control = msrs[i].data; 4048 break; 4049 case MSR_IA32_BNDCFGS: 4050 env->msr_bndcfgs = msrs[i].data; 4051 break; 4052 case MSR_IA32_XSS: 4053 env->xss = msrs[i].data; 4054 break; 4055 case MSR_IA32_UMWAIT_CONTROL: 4056 env->umwait = msrs[i].data; 4057 break; 4058 case MSR_IA32_PKRS: 4059 env->pkrs = msrs[i].data; 4060 break; 4061 default: 4062 if (msrs[i].index >= MSR_MC0_CTL && 4063 msrs[i].index < MSR_MC0_CTL + (env->mcg_cap & 0xff) * 4) { 4064 env->mce_banks[msrs[i].index - MSR_MC0_CTL] = msrs[i].data; 4065 } 4066 break; 4067 case MSR_KVM_ASYNC_PF_EN: 4068 env->async_pf_en_msr = msrs[i].data; 4069 break; 4070 case MSR_KVM_ASYNC_PF_INT: 4071 env->async_pf_int_msr = msrs[i].data; 4072 break; 4073 case MSR_KVM_PV_EOI_EN: 4074 env->pv_eoi_en_msr = msrs[i].data; 4075 break; 4076 case MSR_KVM_STEAL_TIME: 4077 env->steal_time_msr = msrs[i].data; 4078 break; 4079 case MSR_KVM_POLL_CONTROL: { 4080 env->poll_control_msr = msrs[i].data; 4081 break; 4082 } 4083 case MSR_CORE_PERF_FIXED_CTR_CTRL: 4084 env->msr_fixed_ctr_ctrl = msrs[i].data; 4085 break; 4086 case MSR_CORE_PERF_GLOBAL_CTRL: 4087 env->msr_global_ctrl = msrs[i].data; 4088 break; 4089 case MSR_CORE_PERF_GLOBAL_STATUS: 4090 env->msr_global_status = msrs[i].data; 4091 break; 4092 case MSR_CORE_PERF_GLOBAL_OVF_CTRL: 4093 env->msr_global_ovf_ctrl = msrs[i].data; 4094 break; 4095 case MSR_CORE_PERF_FIXED_CTR0 ... MSR_CORE_PERF_FIXED_CTR0 + MAX_FIXED_COUNTERS - 1: 4096 env->msr_fixed_counters[index - MSR_CORE_PERF_FIXED_CTR0] = msrs[i].data; 4097 break; 4098 case MSR_P6_PERFCTR0 ... MSR_P6_PERFCTR0 + MAX_GP_COUNTERS - 1: 4099 env->msr_gp_counters[index - MSR_P6_PERFCTR0] = msrs[i].data; 4100 break; 4101 case MSR_P6_EVNTSEL0 ... MSR_P6_EVNTSEL0 + MAX_GP_COUNTERS - 1: 4102 env->msr_gp_evtsel[index - MSR_P6_EVNTSEL0] = msrs[i].data; 4103 break; 4104 case HV_X64_MSR_HYPERCALL: 4105 env->msr_hv_hypercall = msrs[i].data; 4106 break; 4107 case HV_X64_MSR_GUEST_OS_ID: 4108 env->msr_hv_guest_os_id = msrs[i].data; 4109 break; 4110 case HV_X64_MSR_APIC_ASSIST_PAGE: 4111 env->msr_hv_vapic = msrs[i].data; 4112 break; 4113 case HV_X64_MSR_REFERENCE_TSC: 4114 env->msr_hv_tsc = msrs[i].data; 4115 break; 4116 case HV_X64_MSR_CRASH_P0 ... HV_X64_MSR_CRASH_P4: 4117 env->msr_hv_crash_params[index - HV_X64_MSR_CRASH_P0] = msrs[i].data; 4118 break; 4119 case HV_X64_MSR_VP_RUNTIME: 4120 env->msr_hv_runtime = msrs[i].data; 4121 break; 4122 case HV_X64_MSR_SCONTROL: 4123 env->msr_hv_synic_control = msrs[i].data; 4124 break; 4125 case HV_X64_MSR_SIEFP: 4126 env->msr_hv_synic_evt_page = msrs[i].data; 4127 break; 4128 case HV_X64_MSR_SIMP: 4129 env->msr_hv_synic_msg_page = msrs[i].data; 4130 break; 4131 case HV_X64_MSR_SINT0 ... HV_X64_MSR_SINT15: 4132 env->msr_hv_synic_sint[index - HV_X64_MSR_SINT0] = msrs[i].data; 4133 break; 4134 case HV_X64_MSR_STIMER0_CONFIG: 4135 case HV_X64_MSR_STIMER1_CONFIG: 4136 case HV_X64_MSR_STIMER2_CONFIG: 4137 case HV_X64_MSR_STIMER3_CONFIG: 4138 env->msr_hv_stimer_config[(index - HV_X64_MSR_STIMER0_CONFIG)/2] = 4139 msrs[i].data; 4140 break; 4141 case HV_X64_MSR_STIMER0_COUNT: 4142 case HV_X64_MSR_STIMER1_COUNT: 4143 case HV_X64_MSR_STIMER2_COUNT: 4144 case HV_X64_MSR_STIMER3_COUNT: 4145 env->msr_hv_stimer_count[(index - HV_X64_MSR_STIMER0_COUNT)/2] = 4146 msrs[i].data; 4147 break; 4148 case HV_X64_MSR_REENLIGHTENMENT_CONTROL: 4149 env->msr_hv_reenlightenment_control = msrs[i].data; 4150 break; 4151 case HV_X64_MSR_TSC_EMULATION_CONTROL: 4152 env->msr_hv_tsc_emulation_control = msrs[i].data; 4153 break; 4154 case HV_X64_MSR_TSC_EMULATION_STATUS: 4155 env->msr_hv_tsc_emulation_status = msrs[i].data; 4156 break; 4157 case HV_X64_MSR_SYNDBG_OPTIONS: 4158 env->msr_hv_syndbg_options = msrs[i].data; 4159 break; 4160 case MSR_MTRRdefType: 4161 env->mtrr_deftype = msrs[i].data; 4162 break; 4163 case MSR_MTRRfix64K_00000: 4164 env->mtrr_fixed[0] = msrs[i].data; 4165 break; 4166 case MSR_MTRRfix16K_80000: 4167 env->mtrr_fixed[1] = msrs[i].data; 4168 break; 4169 case MSR_MTRRfix16K_A0000: 4170 env->mtrr_fixed[2] = msrs[i].data; 4171 break; 4172 case MSR_MTRRfix4K_C0000: 4173 env->mtrr_fixed[3] = msrs[i].data; 4174 break; 4175 case MSR_MTRRfix4K_C8000: 4176 env->mtrr_fixed[4] = msrs[i].data; 4177 break; 4178 case MSR_MTRRfix4K_D0000: 4179 env->mtrr_fixed[5] = msrs[i].data; 4180 break; 4181 case MSR_MTRRfix4K_D8000: 4182 env->mtrr_fixed[6] = msrs[i].data; 4183 break; 4184 case MSR_MTRRfix4K_E0000: 4185 env->mtrr_fixed[7] = msrs[i].data; 4186 break; 4187 case MSR_MTRRfix4K_E8000: 4188 env->mtrr_fixed[8] = msrs[i].data; 4189 break; 4190 case MSR_MTRRfix4K_F0000: 4191 env->mtrr_fixed[9] = msrs[i].data; 4192 break; 4193 case MSR_MTRRfix4K_F8000: 4194 env->mtrr_fixed[10] = msrs[i].data; 4195 break; 4196 case MSR_MTRRphysBase(0) ... MSR_MTRRphysMask(MSR_MTRRcap_VCNT - 1): 4197 if (index & 1) { 4198 env->mtrr_var[MSR_MTRRphysIndex(index)].mask = msrs[i].data | 4199 mtrr_top_bits; 4200 } else { 4201 env->mtrr_var[MSR_MTRRphysIndex(index)].base = msrs[i].data; 4202 } 4203 break; 4204 case MSR_IA32_SPEC_CTRL: 4205 env->spec_ctrl = msrs[i].data; 4206 break; 4207 case MSR_AMD64_TSC_RATIO: 4208 env->amd_tsc_scale_msr = msrs[i].data; 4209 break; 4210 case MSR_IA32_TSX_CTRL: 4211 env->tsx_ctrl = msrs[i].data; 4212 break; 4213 case MSR_VIRT_SSBD: 4214 env->virt_ssbd = msrs[i].data; 4215 break; 4216 case MSR_IA32_RTIT_CTL: 4217 env->msr_rtit_ctrl = msrs[i].data; 4218 break; 4219 case MSR_IA32_RTIT_STATUS: 4220 env->msr_rtit_status = msrs[i].data; 4221 break; 4222 case MSR_IA32_RTIT_OUTPUT_BASE: 4223 env->msr_rtit_output_base = msrs[i].data; 4224 break; 4225 case MSR_IA32_RTIT_OUTPUT_MASK: 4226 env->msr_rtit_output_mask = msrs[i].data; 4227 break; 4228 case MSR_IA32_RTIT_CR3_MATCH: 4229 env->msr_rtit_cr3_match = msrs[i].data; 4230 break; 4231 case MSR_IA32_RTIT_ADDR0_A ... MSR_IA32_RTIT_ADDR3_B: 4232 env->msr_rtit_addrs[index - MSR_IA32_RTIT_ADDR0_A] = msrs[i].data; 4233 break; 4234 case MSR_IA32_SGXLEPUBKEYHASH0 ... MSR_IA32_SGXLEPUBKEYHASH3: 4235 env->msr_ia32_sgxlepubkeyhash[index - MSR_IA32_SGXLEPUBKEYHASH0] = 4236 msrs[i].data; 4237 break; 4238 case MSR_IA32_XFD: 4239 env->msr_xfd = msrs[i].data; 4240 break; 4241 case MSR_IA32_XFD_ERR: 4242 env->msr_xfd_err = msrs[i].data; 4243 break; 4244 case MSR_ARCH_LBR_CTL: 4245 env->msr_lbr_ctl = msrs[i].data; 4246 break; 4247 case MSR_ARCH_LBR_DEPTH: 4248 env->msr_lbr_depth = msrs[i].data; 4249 break; 4250 case MSR_ARCH_LBR_FROM_0 ... MSR_ARCH_LBR_FROM_0 + 31: 4251 env->lbr_records[index - MSR_ARCH_LBR_FROM_0].from = msrs[i].data; 4252 break; 4253 case MSR_ARCH_LBR_TO_0 ... MSR_ARCH_LBR_TO_0 + 31: 4254 env->lbr_records[index - MSR_ARCH_LBR_TO_0].to = msrs[i].data; 4255 break; 4256 case MSR_ARCH_LBR_INFO_0 ... MSR_ARCH_LBR_INFO_0 + 31: 4257 env->lbr_records[index - MSR_ARCH_LBR_INFO_0].info = msrs[i].data; 4258 break; 4259 } 4260 } 4261 4262 return 0; 4263 } 4264 4265 static int kvm_put_mp_state(X86CPU *cpu) 4266 { 4267 struct kvm_mp_state mp_state = { .mp_state = cpu->env.mp_state }; 4268 4269 return kvm_vcpu_ioctl(CPU(cpu), KVM_SET_MP_STATE, &mp_state); 4270 } 4271 4272 static int kvm_get_mp_state(X86CPU *cpu) 4273 { 4274 CPUState *cs = CPU(cpu); 4275 CPUX86State *env = &cpu->env; 4276 struct kvm_mp_state mp_state; 4277 int ret; 4278 4279 ret = kvm_vcpu_ioctl(cs, KVM_GET_MP_STATE, &mp_state); 4280 if (ret < 0) { 4281 return ret; 4282 } 4283 env->mp_state = mp_state.mp_state; 4284 if (kvm_irqchip_in_kernel()) { 4285 cs->halted = (mp_state.mp_state == KVM_MP_STATE_HALTED); 4286 } 4287 return 0; 4288 } 4289 4290 static int kvm_get_apic(X86CPU *cpu) 4291 { 4292 DeviceState *apic = cpu->apic_state; 4293 struct kvm_lapic_state kapic; 4294 int ret; 4295 4296 if (apic && kvm_irqchip_in_kernel()) { 4297 ret = kvm_vcpu_ioctl(CPU(cpu), KVM_GET_LAPIC, &kapic); 4298 if (ret < 0) { 4299 return ret; 4300 } 4301 4302 kvm_get_apic_state(apic, &kapic); 4303 } 4304 return 0; 4305 } 4306 4307 static int kvm_put_vcpu_events(X86CPU *cpu, int level) 4308 { 4309 CPUState *cs = CPU(cpu); 4310 CPUX86State *env = &cpu->env; 4311 struct kvm_vcpu_events events = {}; 4312 4313 events.flags = 0; 4314 4315 if (has_exception_payload) { 4316 events.flags |= KVM_VCPUEVENT_VALID_PAYLOAD; 4317 events.exception.pending = env->exception_pending; 4318 events.exception_has_payload = env->exception_has_payload; 4319 events.exception_payload = env->exception_payload; 4320 } 4321 events.exception.nr = env->exception_nr; 4322 events.exception.injected = env->exception_injected; 4323 events.exception.has_error_code = env->has_error_code; 4324 events.exception.error_code = env->error_code; 4325 4326 events.interrupt.injected = (env->interrupt_injected >= 0); 4327 events.interrupt.nr = env->interrupt_injected; 4328 events.interrupt.soft = env->soft_interrupt; 4329 4330 events.nmi.injected = env->nmi_injected; 4331 events.nmi.pending = env->nmi_pending; 4332 events.nmi.masked = !!(env->hflags2 & HF2_NMI_MASK); 4333 4334 events.sipi_vector = env->sipi_vector; 4335 4336 if (has_msr_smbase) { 4337 events.smi.smm = !!(env->hflags & HF_SMM_MASK); 4338 events.smi.smm_inside_nmi = !!(env->hflags2 & HF2_SMM_INSIDE_NMI_MASK); 4339 if (kvm_irqchip_in_kernel()) { 4340 /* As soon as these are moved to the kernel, remove them 4341 * from cs->interrupt_request. 4342 */ 4343 events.smi.pending = cs->interrupt_request & CPU_INTERRUPT_SMI; 4344 events.smi.latched_init = cs->interrupt_request & CPU_INTERRUPT_INIT; 4345 cs->interrupt_request &= ~(CPU_INTERRUPT_INIT | CPU_INTERRUPT_SMI); 4346 } else { 4347 /* Keep these in cs->interrupt_request. */ 4348 events.smi.pending = 0; 4349 events.smi.latched_init = 0; 4350 } 4351 /* Stop SMI delivery on old machine types to avoid a reboot 4352 * on an inward migration of an old VM. 4353 */ 4354 if (!cpu->kvm_no_smi_migration) { 4355 events.flags |= KVM_VCPUEVENT_VALID_SMM; 4356 } 4357 } 4358 4359 if (level >= KVM_PUT_RESET_STATE) { 4360 events.flags |= KVM_VCPUEVENT_VALID_NMI_PENDING; 4361 if (env->mp_state == KVM_MP_STATE_SIPI_RECEIVED) { 4362 events.flags |= KVM_VCPUEVENT_VALID_SIPI_VECTOR; 4363 } 4364 } 4365 4366 if (has_triple_fault_event) { 4367 events.flags |= KVM_VCPUEVENT_VALID_TRIPLE_FAULT; 4368 events.triple_fault.pending = env->triple_fault_pending; 4369 } 4370 4371 return kvm_vcpu_ioctl(CPU(cpu), KVM_SET_VCPU_EVENTS, &events); 4372 } 4373 4374 static int kvm_get_vcpu_events(X86CPU *cpu) 4375 { 4376 CPUX86State *env = &cpu->env; 4377 struct kvm_vcpu_events events; 4378 int ret; 4379 4380 memset(&events, 0, sizeof(events)); 4381 ret = kvm_vcpu_ioctl(CPU(cpu), KVM_GET_VCPU_EVENTS, &events); 4382 if (ret < 0) { 4383 return ret; 4384 } 4385 4386 if (events.flags & KVM_VCPUEVENT_VALID_PAYLOAD) { 4387 env->exception_pending = events.exception.pending; 4388 env->exception_has_payload = events.exception_has_payload; 4389 env->exception_payload = events.exception_payload; 4390 } else { 4391 env->exception_pending = 0; 4392 env->exception_has_payload = false; 4393 } 4394 env->exception_injected = events.exception.injected; 4395 env->exception_nr = 4396 (env->exception_pending || env->exception_injected) ? 4397 events.exception.nr : -1; 4398 env->has_error_code = events.exception.has_error_code; 4399 env->error_code = events.exception.error_code; 4400 4401 env->interrupt_injected = 4402 events.interrupt.injected ? events.interrupt.nr : -1; 4403 env->soft_interrupt = events.interrupt.soft; 4404 4405 env->nmi_injected = events.nmi.injected; 4406 env->nmi_pending = events.nmi.pending; 4407 if (events.nmi.masked) { 4408 env->hflags2 |= HF2_NMI_MASK; 4409 } else { 4410 env->hflags2 &= ~HF2_NMI_MASK; 4411 } 4412 4413 if (events.flags & KVM_VCPUEVENT_VALID_SMM) { 4414 if (events.smi.smm) { 4415 env->hflags |= HF_SMM_MASK; 4416 } else { 4417 env->hflags &= ~HF_SMM_MASK; 4418 } 4419 if (events.smi.pending) { 4420 cpu_interrupt(CPU(cpu), CPU_INTERRUPT_SMI); 4421 } else { 4422 cpu_reset_interrupt(CPU(cpu), CPU_INTERRUPT_SMI); 4423 } 4424 if (events.smi.smm_inside_nmi) { 4425 env->hflags2 |= HF2_SMM_INSIDE_NMI_MASK; 4426 } else { 4427 env->hflags2 &= ~HF2_SMM_INSIDE_NMI_MASK; 4428 } 4429 if (events.smi.latched_init) { 4430 cpu_interrupt(CPU(cpu), CPU_INTERRUPT_INIT); 4431 } else { 4432 cpu_reset_interrupt(CPU(cpu), CPU_INTERRUPT_INIT); 4433 } 4434 } 4435 4436 if (events.flags & KVM_VCPUEVENT_VALID_TRIPLE_FAULT) { 4437 env->triple_fault_pending = events.triple_fault.pending; 4438 } 4439 4440 env->sipi_vector = events.sipi_vector; 4441 4442 return 0; 4443 } 4444 4445 static int kvm_put_debugregs(X86CPU *cpu) 4446 { 4447 CPUX86State *env = &cpu->env; 4448 struct kvm_debugregs dbgregs; 4449 int i; 4450 4451 memset(&dbgregs, 0, sizeof(dbgregs)); 4452 for (i = 0; i < 4; i++) { 4453 dbgregs.db[i] = env->dr[i]; 4454 } 4455 dbgregs.dr6 = env->dr[6]; 4456 dbgregs.dr7 = env->dr[7]; 4457 dbgregs.flags = 0; 4458 4459 return kvm_vcpu_ioctl(CPU(cpu), KVM_SET_DEBUGREGS, &dbgregs); 4460 } 4461 4462 static int kvm_get_debugregs(X86CPU *cpu) 4463 { 4464 CPUX86State *env = &cpu->env; 4465 struct kvm_debugregs dbgregs; 4466 int i, ret; 4467 4468 ret = kvm_vcpu_ioctl(CPU(cpu), KVM_GET_DEBUGREGS, &dbgregs); 4469 if (ret < 0) { 4470 return ret; 4471 } 4472 for (i = 0; i < 4; i++) { 4473 env->dr[i] = dbgregs.db[i]; 4474 } 4475 env->dr[4] = env->dr[6] = dbgregs.dr6; 4476 env->dr[5] = env->dr[7] = dbgregs.dr7; 4477 4478 return 0; 4479 } 4480 4481 static int kvm_put_nested_state(X86CPU *cpu) 4482 { 4483 CPUX86State *env = &cpu->env; 4484 int max_nested_state_len = kvm_max_nested_state_length(); 4485 4486 if (!env->nested_state) { 4487 return 0; 4488 } 4489 4490 /* 4491 * Copy flags that are affected by reset from env->hflags and env->hflags2. 4492 */ 4493 if (env->hflags & HF_GUEST_MASK) { 4494 env->nested_state->flags |= KVM_STATE_NESTED_GUEST_MODE; 4495 } else { 4496 env->nested_state->flags &= ~KVM_STATE_NESTED_GUEST_MODE; 4497 } 4498 4499 /* Don't set KVM_STATE_NESTED_GIF_SET on VMX as it is illegal */ 4500 if (cpu_has_svm(env) && (env->hflags2 & HF2_GIF_MASK)) { 4501 env->nested_state->flags |= KVM_STATE_NESTED_GIF_SET; 4502 } else { 4503 env->nested_state->flags &= ~KVM_STATE_NESTED_GIF_SET; 4504 } 4505 4506 assert(env->nested_state->size <= max_nested_state_len); 4507 return kvm_vcpu_ioctl(CPU(cpu), KVM_SET_NESTED_STATE, env->nested_state); 4508 } 4509 4510 static int kvm_get_nested_state(X86CPU *cpu) 4511 { 4512 CPUX86State *env = &cpu->env; 4513 int max_nested_state_len = kvm_max_nested_state_length(); 4514 int ret; 4515 4516 if (!env->nested_state) { 4517 return 0; 4518 } 4519 4520 /* 4521 * It is possible that migration restored a smaller size into 4522 * nested_state->hdr.size than what our kernel support. 4523 * We preserve migration origin nested_state->hdr.size for 4524 * call to KVM_SET_NESTED_STATE but wish that our next call 4525 * to KVM_GET_NESTED_STATE will use max size our kernel support. 4526 */ 4527 env->nested_state->size = max_nested_state_len; 4528 4529 ret = kvm_vcpu_ioctl(CPU(cpu), KVM_GET_NESTED_STATE, env->nested_state); 4530 if (ret < 0) { 4531 return ret; 4532 } 4533 4534 /* 4535 * Copy flags that are affected by reset to env->hflags and env->hflags2. 4536 */ 4537 if (env->nested_state->flags & KVM_STATE_NESTED_GUEST_MODE) { 4538 env->hflags |= HF_GUEST_MASK; 4539 } else { 4540 env->hflags &= ~HF_GUEST_MASK; 4541 } 4542 4543 /* Keep HF2_GIF_MASK set on !SVM as x86_cpu_pending_interrupt() needs it */ 4544 if (cpu_has_svm(env)) { 4545 if (env->nested_state->flags & KVM_STATE_NESTED_GIF_SET) { 4546 env->hflags2 |= HF2_GIF_MASK; 4547 } else { 4548 env->hflags2 &= ~HF2_GIF_MASK; 4549 } 4550 } 4551 4552 return ret; 4553 } 4554 4555 int kvm_arch_put_registers(CPUState *cpu, int level) 4556 { 4557 X86CPU *x86_cpu = X86_CPU(cpu); 4558 int ret; 4559 4560 assert(cpu_is_stopped(cpu) || qemu_cpu_is_self(cpu)); 4561 4562 /* 4563 * Put MSR_IA32_FEATURE_CONTROL first, this ensures the VM gets out of VMX 4564 * root operation upon vCPU reset. kvm_put_msr_feature_control() should also 4565 * precede kvm_put_nested_state() when 'real' nested state is set. 4566 */ 4567 if (level >= KVM_PUT_RESET_STATE) { 4568 ret = kvm_put_msr_feature_control(x86_cpu); 4569 if (ret < 0) { 4570 return ret; 4571 } 4572 } 4573 4574 /* must be before kvm_put_nested_state so that EFER.SVME is set */ 4575 ret = has_sregs2 ? kvm_put_sregs2(x86_cpu) : kvm_put_sregs(x86_cpu); 4576 if (ret < 0) { 4577 return ret; 4578 } 4579 4580 if (level >= KVM_PUT_RESET_STATE) { 4581 ret = kvm_put_nested_state(x86_cpu); 4582 if (ret < 0) { 4583 return ret; 4584 } 4585 } 4586 4587 if (level == KVM_PUT_FULL_STATE) { 4588 /* We don't check for kvm_arch_set_tsc_khz() errors here, 4589 * because TSC frequency mismatch shouldn't abort migration, 4590 * unless the user explicitly asked for a more strict TSC 4591 * setting (e.g. using an explicit "tsc-freq" option). 4592 */ 4593 kvm_arch_set_tsc_khz(cpu); 4594 } 4595 4596 #ifdef CONFIG_XEN_EMU 4597 if (xen_mode == XEN_EMULATE && level == KVM_PUT_FULL_STATE) { 4598 ret = kvm_put_xen_state(cpu); 4599 if (ret < 0) { 4600 return ret; 4601 } 4602 } 4603 #endif 4604 4605 ret = kvm_getput_regs(x86_cpu, 1); 4606 if (ret < 0) { 4607 return ret; 4608 } 4609 ret = kvm_put_xsave(x86_cpu); 4610 if (ret < 0) { 4611 return ret; 4612 } 4613 ret = kvm_put_xcrs(x86_cpu); 4614 if (ret < 0) { 4615 return ret; 4616 } 4617 ret = kvm_put_msrs(x86_cpu, level); 4618 if (ret < 0) { 4619 return ret; 4620 } 4621 ret = kvm_put_vcpu_events(x86_cpu, level); 4622 if (ret < 0) { 4623 return ret; 4624 } 4625 if (level >= KVM_PUT_RESET_STATE) { 4626 ret = kvm_put_mp_state(x86_cpu); 4627 if (ret < 0) { 4628 return ret; 4629 } 4630 } 4631 4632 ret = kvm_put_tscdeadline_msr(x86_cpu); 4633 if (ret < 0) { 4634 return ret; 4635 } 4636 ret = kvm_put_debugregs(x86_cpu); 4637 if (ret < 0) { 4638 return ret; 4639 } 4640 return 0; 4641 } 4642 4643 int kvm_arch_get_registers(CPUState *cs) 4644 { 4645 X86CPU *cpu = X86_CPU(cs); 4646 int ret; 4647 4648 assert(cpu_is_stopped(cs) || qemu_cpu_is_self(cs)); 4649 4650 ret = kvm_get_vcpu_events(cpu); 4651 if (ret < 0) { 4652 goto out; 4653 } 4654 /* 4655 * KVM_GET_MPSTATE can modify CS and RIP, call it before 4656 * KVM_GET_REGS and KVM_GET_SREGS. 4657 */ 4658 ret = kvm_get_mp_state(cpu); 4659 if (ret < 0) { 4660 goto out; 4661 } 4662 ret = kvm_getput_regs(cpu, 0); 4663 if (ret < 0) { 4664 goto out; 4665 } 4666 ret = kvm_get_xsave(cpu); 4667 if (ret < 0) { 4668 goto out; 4669 } 4670 ret = kvm_get_xcrs(cpu); 4671 if (ret < 0) { 4672 goto out; 4673 } 4674 ret = has_sregs2 ? kvm_get_sregs2(cpu) : kvm_get_sregs(cpu); 4675 if (ret < 0) { 4676 goto out; 4677 } 4678 ret = kvm_get_msrs(cpu); 4679 if (ret < 0) { 4680 goto out; 4681 } 4682 ret = kvm_get_apic(cpu); 4683 if (ret < 0) { 4684 goto out; 4685 } 4686 ret = kvm_get_debugregs(cpu); 4687 if (ret < 0) { 4688 goto out; 4689 } 4690 ret = kvm_get_nested_state(cpu); 4691 if (ret < 0) { 4692 goto out; 4693 } 4694 #ifdef CONFIG_XEN_EMU 4695 if (xen_mode == XEN_EMULATE) { 4696 ret = kvm_get_xen_state(cs); 4697 if (ret < 0) { 4698 goto out; 4699 } 4700 } 4701 #endif 4702 ret = 0; 4703 out: 4704 cpu_sync_bndcs_hflags(&cpu->env); 4705 return ret; 4706 } 4707 4708 void kvm_arch_pre_run(CPUState *cpu, struct kvm_run *run) 4709 { 4710 X86CPU *x86_cpu = X86_CPU(cpu); 4711 CPUX86State *env = &x86_cpu->env; 4712 int ret; 4713 4714 /* Inject NMI */ 4715 if (cpu->interrupt_request & (CPU_INTERRUPT_NMI | CPU_INTERRUPT_SMI)) { 4716 if (cpu->interrupt_request & CPU_INTERRUPT_NMI) { 4717 qemu_mutex_lock_iothread(); 4718 cpu->interrupt_request &= ~CPU_INTERRUPT_NMI; 4719 qemu_mutex_unlock_iothread(); 4720 DPRINTF("injected NMI\n"); 4721 ret = kvm_vcpu_ioctl(cpu, KVM_NMI); 4722 if (ret < 0) { 4723 fprintf(stderr, "KVM: injection failed, NMI lost (%s)\n", 4724 strerror(-ret)); 4725 } 4726 } 4727 if (cpu->interrupt_request & CPU_INTERRUPT_SMI) { 4728 qemu_mutex_lock_iothread(); 4729 cpu->interrupt_request &= ~CPU_INTERRUPT_SMI; 4730 qemu_mutex_unlock_iothread(); 4731 DPRINTF("injected SMI\n"); 4732 ret = kvm_vcpu_ioctl(cpu, KVM_SMI); 4733 if (ret < 0) { 4734 fprintf(stderr, "KVM: injection failed, SMI lost (%s)\n", 4735 strerror(-ret)); 4736 } 4737 } 4738 } 4739 4740 if (!kvm_pic_in_kernel()) { 4741 qemu_mutex_lock_iothread(); 4742 } 4743 4744 /* Force the VCPU out of its inner loop to process any INIT requests 4745 * or (for userspace APIC, but it is cheap to combine the checks here) 4746 * pending TPR access reports. 4747 */ 4748 if (cpu->interrupt_request & (CPU_INTERRUPT_INIT | CPU_INTERRUPT_TPR)) { 4749 if ((cpu->interrupt_request & CPU_INTERRUPT_INIT) && 4750 !(env->hflags & HF_SMM_MASK)) { 4751 cpu->exit_request = 1; 4752 } 4753 if (cpu->interrupt_request & CPU_INTERRUPT_TPR) { 4754 cpu->exit_request = 1; 4755 } 4756 } 4757 4758 if (!kvm_pic_in_kernel()) { 4759 /* Try to inject an interrupt if the guest can accept it */ 4760 if (run->ready_for_interrupt_injection && 4761 (cpu->interrupt_request & CPU_INTERRUPT_HARD) && 4762 (env->eflags & IF_MASK)) { 4763 int irq; 4764 4765 cpu->interrupt_request &= ~CPU_INTERRUPT_HARD; 4766 irq = cpu_get_pic_interrupt(env); 4767 if (irq >= 0) { 4768 struct kvm_interrupt intr; 4769 4770 intr.irq = irq; 4771 DPRINTF("injected interrupt %d\n", irq); 4772 ret = kvm_vcpu_ioctl(cpu, KVM_INTERRUPT, &intr); 4773 if (ret < 0) { 4774 fprintf(stderr, 4775 "KVM: injection failed, interrupt lost (%s)\n", 4776 strerror(-ret)); 4777 } 4778 } 4779 } 4780 4781 /* If we have an interrupt but the guest is not ready to receive an 4782 * interrupt, request an interrupt window exit. This will 4783 * cause a return to userspace as soon as the guest is ready to 4784 * receive interrupts. */ 4785 if ((cpu->interrupt_request & CPU_INTERRUPT_HARD)) { 4786 run->request_interrupt_window = 1; 4787 } else { 4788 run->request_interrupt_window = 0; 4789 } 4790 4791 DPRINTF("setting tpr\n"); 4792 run->cr8 = cpu_get_apic_tpr(x86_cpu->apic_state); 4793 4794 qemu_mutex_unlock_iothread(); 4795 } 4796 } 4797 4798 static void kvm_rate_limit_on_bus_lock(void) 4799 { 4800 uint64_t delay_ns = ratelimit_calculate_delay(&bus_lock_ratelimit_ctrl, 1); 4801 4802 if (delay_ns) { 4803 g_usleep(delay_ns / SCALE_US); 4804 } 4805 } 4806 4807 MemTxAttrs kvm_arch_post_run(CPUState *cpu, struct kvm_run *run) 4808 { 4809 X86CPU *x86_cpu = X86_CPU(cpu); 4810 CPUX86State *env = &x86_cpu->env; 4811 4812 if (run->flags & KVM_RUN_X86_SMM) { 4813 env->hflags |= HF_SMM_MASK; 4814 } else { 4815 env->hflags &= ~HF_SMM_MASK; 4816 } 4817 if (run->if_flag) { 4818 env->eflags |= IF_MASK; 4819 } else { 4820 env->eflags &= ~IF_MASK; 4821 } 4822 if (run->flags & KVM_RUN_X86_BUS_LOCK) { 4823 kvm_rate_limit_on_bus_lock(); 4824 } 4825 4826 #ifdef CONFIG_XEN_EMU 4827 /* 4828 * If the callback is asserted as a GSI (or PCI INTx) then check if 4829 * vcpu_info->evtchn_upcall_pending has been cleared, and deassert 4830 * the callback IRQ if so. Ideally we could hook into the PIC/IOAPIC 4831 * EOI and only resample then, exactly how the VFIO eventfd pairs 4832 * are designed to work for level triggered interrupts. 4833 */ 4834 if (x86_cpu->env.xen_callback_asserted) { 4835 kvm_xen_maybe_deassert_callback(cpu); 4836 } 4837 #endif 4838 4839 /* We need to protect the apic state against concurrent accesses from 4840 * different threads in case the userspace irqchip is used. */ 4841 if (!kvm_irqchip_in_kernel()) { 4842 qemu_mutex_lock_iothread(); 4843 } 4844 cpu_set_apic_tpr(x86_cpu->apic_state, run->cr8); 4845 cpu_set_apic_base(x86_cpu->apic_state, run->apic_base); 4846 if (!kvm_irqchip_in_kernel()) { 4847 qemu_mutex_unlock_iothread(); 4848 } 4849 return cpu_get_mem_attrs(env); 4850 } 4851 4852 int kvm_arch_process_async_events(CPUState *cs) 4853 { 4854 X86CPU *cpu = X86_CPU(cs); 4855 CPUX86State *env = &cpu->env; 4856 4857 if (cs->interrupt_request & CPU_INTERRUPT_MCE) { 4858 /* We must not raise CPU_INTERRUPT_MCE if it's not supported. */ 4859 assert(env->mcg_cap); 4860 4861 cs->interrupt_request &= ~CPU_INTERRUPT_MCE; 4862 4863 kvm_cpu_synchronize_state(cs); 4864 4865 if (env->exception_nr == EXCP08_DBLE) { 4866 /* this means triple fault */ 4867 qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); 4868 cs->exit_request = 1; 4869 return 0; 4870 } 4871 kvm_queue_exception(env, EXCP12_MCHK, 0, 0); 4872 env->has_error_code = 0; 4873 4874 cs->halted = 0; 4875 if (kvm_irqchip_in_kernel() && env->mp_state == KVM_MP_STATE_HALTED) { 4876 env->mp_state = KVM_MP_STATE_RUNNABLE; 4877 } 4878 } 4879 4880 if ((cs->interrupt_request & CPU_INTERRUPT_INIT) && 4881 !(env->hflags & HF_SMM_MASK)) { 4882 kvm_cpu_synchronize_state(cs); 4883 do_cpu_init(cpu); 4884 } 4885 4886 if (kvm_irqchip_in_kernel()) { 4887 return 0; 4888 } 4889 4890 if (cs->interrupt_request & CPU_INTERRUPT_POLL) { 4891 cs->interrupt_request &= ~CPU_INTERRUPT_POLL; 4892 apic_poll_irq(cpu->apic_state); 4893 } 4894 if (((cs->interrupt_request & CPU_INTERRUPT_HARD) && 4895 (env->eflags & IF_MASK)) || 4896 (cs->interrupt_request & CPU_INTERRUPT_NMI)) { 4897 cs->halted = 0; 4898 } 4899 if (cs->interrupt_request & CPU_INTERRUPT_SIPI) { 4900 kvm_cpu_synchronize_state(cs); 4901 do_cpu_sipi(cpu); 4902 } 4903 if (cs->interrupt_request & CPU_INTERRUPT_TPR) { 4904 cs->interrupt_request &= ~CPU_INTERRUPT_TPR; 4905 kvm_cpu_synchronize_state(cs); 4906 apic_handle_tpr_access_report(cpu->apic_state, env->eip, 4907 env->tpr_access_type); 4908 } 4909 4910 return cs->halted; 4911 } 4912 4913 static int kvm_handle_halt(X86CPU *cpu) 4914 { 4915 CPUState *cs = CPU(cpu); 4916 CPUX86State *env = &cpu->env; 4917 4918 if (!((cs->interrupt_request & CPU_INTERRUPT_HARD) && 4919 (env->eflags & IF_MASK)) && 4920 !(cs->interrupt_request & CPU_INTERRUPT_NMI)) { 4921 cs->halted = 1; 4922 return EXCP_HLT; 4923 } 4924 4925 return 0; 4926 } 4927 4928 static int kvm_handle_tpr_access(X86CPU *cpu) 4929 { 4930 CPUState *cs = CPU(cpu); 4931 struct kvm_run *run = cs->kvm_run; 4932 4933 apic_handle_tpr_access_report(cpu->apic_state, run->tpr_access.rip, 4934 run->tpr_access.is_write ? TPR_ACCESS_WRITE 4935 : TPR_ACCESS_READ); 4936 return 1; 4937 } 4938 4939 int kvm_arch_insert_sw_breakpoint(CPUState *cs, struct kvm_sw_breakpoint *bp) 4940 { 4941 static const uint8_t int3 = 0xcc; 4942 4943 if (cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)&bp->saved_insn, 1, 0) || 4944 cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)&int3, 1, 1)) { 4945 return -EINVAL; 4946 } 4947 return 0; 4948 } 4949 4950 int kvm_arch_remove_sw_breakpoint(CPUState *cs, struct kvm_sw_breakpoint *bp) 4951 { 4952 uint8_t int3; 4953 4954 if (cpu_memory_rw_debug(cs, bp->pc, &int3, 1, 0)) { 4955 return -EINVAL; 4956 } 4957 if (int3 != 0xcc) { 4958 return 0; 4959 } 4960 if (cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)&bp->saved_insn, 1, 1)) { 4961 return -EINVAL; 4962 } 4963 return 0; 4964 } 4965 4966 static struct { 4967 target_ulong addr; 4968 int len; 4969 int type; 4970 } hw_breakpoint[4]; 4971 4972 static int nb_hw_breakpoint; 4973 4974 static int find_hw_breakpoint(target_ulong addr, int len, int type) 4975 { 4976 int n; 4977 4978 for (n = 0; n < nb_hw_breakpoint; n++) { 4979 if (hw_breakpoint[n].addr == addr && hw_breakpoint[n].type == type && 4980 (hw_breakpoint[n].len == len || len == -1)) { 4981 return n; 4982 } 4983 } 4984 return -1; 4985 } 4986 4987 int kvm_arch_insert_hw_breakpoint(vaddr addr, vaddr len, int type) 4988 { 4989 switch (type) { 4990 case GDB_BREAKPOINT_HW: 4991 len = 1; 4992 break; 4993 case GDB_WATCHPOINT_WRITE: 4994 case GDB_WATCHPOINT_ACCESS: 4995 switch (len) { 4996 case 1: 4997 break; 4998 case 2: 4999 case 4: 5000 case 8: 5001 if (addr & (len - 1)) { 5002 return -EINVAL; 5003 } 5004 break; 5005 default: 5006 return -EINVAL; 5007 } 5008 break; 5009 default: 5010 return -ENOSYS; 5011 } 5012 5013 if (nb_hw_breakpoint == 4) { 5014 return -ENOBUFS; 5015 } 5016 if (find_hw_breakpoint(addr, len, type) >= 0) { 5017 return -EEXIST; 5018 } 5019 hw_breakpoint[nb_hw_breakpoint].addr = addr; 5020 hw_breakpoint[nb_hw_breakpoint].len = len; 5021 hw_breakpoint[nb_hw_breakpoint].type = type; 5022 nb_hw_breakpoint++; 5023 5024 return 0; 5025 } 5026 5027 int kvm_arch_remove_hw_breakpoint(vaddr addr, vaddr len, int type) 5028 { 5029 int n; 5030 5031 n = find_hw_breakpoint(addr, (type == GDB_BREAKPOINT_HW) ? 1 : len, type); 5032 if (n < 0) { 5033 return -ENOENT; 5034 } 5035 nb_hw_breakpoint--; 5036 hw_breakpoint[n] = hw_breakpoint[nb_hw_breakpoint]; 5037 5038 return 0; 5039 } 5040 5041 void kvm_arch_remove_all_hw_breakpoints(void) 5042 { 5043 nb_hw_breakpoint = 0; 5044 } 5045 5046 static CPUWatchpoint hw_watchpoint; 5047 5048 static int kvm_handle_debug(X86CPU *cpu, 5049 struct kvm_debug_exit_arch *arch_info) 5050 { 5051 CPUState *cs = CPU(cpu); 5052 CPUX86State *env = &cpu->env; 5053 int ret = 0; 5054 int n; 5055 5056 if (arch_info->exception == EXCP01_DB) { 5057 if (arch_info->dr6 & DR6_BS) { 5058 if (cs->singlestep_enabled) { 5059 ret = EXCP_DEBUG; 5060 } 5061 } else { 5062 for (n = 0; n < 4; n++) { 5063 if (arch_info->dr6 & (1 << n)) { 5064 switch ((arch_info->dr7 >> (16 + n*4)) & 0x3) { 5065 case 0x0: 5066 ret = EXCP_DEBUG; 5067 break; 5068 case 0x1: 5069 ret = EXCP_DEBUG; 5070 cs->watchpoint_hit = &hw_watchpoint; 5071 hw_watchpoint.vaddr = hw_breakpoint[n].addr; 5072 hw_watchpoint.flags = BP_MEM_WRITE; 5073 break; 5074 case 0x3: 5075 ret = EXCP_DEBUG; 5076 cs->watchpoint_hit = &hw_watchpoint; 5077 hw_watchpoint.vaddr = hw_breakpoint[n].addr; 5078 hw_watchpoint.flags = BP_MEM_ACCESS; 5079 break; 5080 } 5081 } 5082 } 5083 } 5084 } else if (kvm_find_sw_breakpoint(cs, arch_info->pc)) { 5085 ret = EXCP_DEBUG; 5086 } 5087 if (ret == 0) { 5088 cpu_synchronize_state(cs); 5089 assert(env->exception_nr == -1); 5090 5091 /* pass to guest */ 5092 kvm_queue_exception(env, arch_info->exception, 5093 arch_info->exception == EXCP01_DB, 5094 arch_info->dr6); 5095 env->has_error_code = 0; 5096 } 5097 5098 return ret; 5099 } 5100 5101 void kvm_arch_update_guest_debug(CPUState *cpu, struct kvm_guest_debug *dbg) 5102 { 5103 const uint8_t type_code[] = { 5104 [GDB_BREAKPOINT_HW] = 0x0, 5105 [GDB_WATCHPOINT_WRITE] = 0x1, 5106 [GDB_WATCHPOINT_ACCESS] = 0x3 5107 }; 5108 const uint8_t len_code[] = { 5109 [1] = 0x0, [2] = 0x1, [4] = 0x3, [8] = 0x2 5110 }; 5111 int n; 5112 5113 if (kvm_sw_breakpoints_active(cpu)) { 5114 dbg->control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_SW_BP; 5115 } 5116 if (nb_hw_breakpoint > 0) { 5117 dbg->control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_HW_BP; 5118 dbg->arch.debugreg[7] = 0x0600; 5119 for (n = 0; n < nb_hw_breakpoint; n++) { 5120 dbg->arch.debugreg[n] = hw_breakpoint[n].addr; 5121 dbg->arch.debugreg[7] |= (2 << (n * 2)) | 5122 (type_code[hw_breakpoint[n].type] << (16 + n*4)) | 5123 ((uint32_t)len_code[hw_breakpoint[n].len] << (18 + n*4)); 5124 } 5125 } 5126 } 5127 5128 static bool kvm_install_msr_filters(KVMState *s) 5129 { 5130 uint64_t zero = 0; 5131 struct kvm_msr_filter filter = { 5132 .flags = KVM_MSR_FILTER_DEFAULT_ALLOW, 5133 }; 5134 int r, i, j = 0; 5135 5136 for (i = 0; i < KVM_MSR_FILTER_MAX_RANGES; i++) { 5137 KVMMSRHandlers *handler = &msr_handlers[i]; 5138 if (handler->msr) { 5139 struct kvm_msr_filter_range *range = &filter.ranges[j++]; 5140 5141 *range = (struct kvm_msr_filter_range) { 5142 .flags = 0, 5143 .nmsrs = 1, 5144 .base = handler->msr, 5145 .bitmap = (__u8 *)&zero, 5146 }; 5147 5148 if (handler->rdmsr) { 5149 range->flags |= KVM_MSR_FILTER_READ; 5150 } 5151 5152 if (handler->wrmsr) { 5153 range->flags |= KVM_MSR_FILTER_WRITE; 5154 } 5155 } 5156 } 5157 5158 r = kvm_vm_ioctl(s, KVM_X86_SET_MSR_FILTER, &filter); 5159 if (r) { 5160 return false; 5161 } 5162 5163 return true; 5164 } 5165 5166 bool kvm_filter_msr(KVMState *s, uint32_t msr, QEMURDMSRHandler *rdmsr, 5167 QEMUWRMSRHandler *wrmsr) 5168 { 5169 int i; 5170 5171 for (i = 0; i < ARRAY_SIZE(msr_handlers); i++) { 5172 if (!msr_handlers[i].msr) { 5173 msr_handlers[i] = (KVMMSRHandlers) { 5174 .msr = msr, 5175 .rdmsr = rdmsr, 5176 .wrmsr = wrmsr, 5177 }; 5178 5179 if (!kvm_install_msr_filters(s)) { 5180 msr_handlers[i] = (KVMMSRHandlers) { }; 5181 return false; 5182 } 5183 5184 return true; 5185 } 5186 } 5187 5188 return false; 5189 } 5190 5191 static int kvm_handle_rdmsr(X86CPU *cpu, struct kvm_run *run) 5192 { 5193 int i; 5194 bool r; 5195 5196 for (i = 0; i < ARRAY_SIZE(msr_handlers); i++) { 5197 KVMMSRHandlers *handler = &msr_handlers[i]; 5198 if (run->msr.index == handler->msr) { 5199 if (handler->rdmsr) { 5200 r = handler->rdmsr(cpu, handler->msr, 5201 (uint64_t *)&run->msr.data); 5202 run->msr.error = r ? 0 : 1; 5203 return 0; 5204 } 5205 } 5206 } 5207 5208 assert(false); 5209 } 5210 5211 static int kvm_handle_wrmsr(X86CPU *cpu, struct kvm_run *run) 5212 { 5213 int i; 5214 bool r; 5215 5216 for (i = 0; i < ARRAY_SIZE(msr_handlers); i++) { 5217 KVMMSRHandlers *handler = &msr_handlers[i]; 5218 if (run->msr.index == handler->msr) { 5219 if (handler->wrmsr) { 5220 r = handler->wrmsr(cpu, handler->msr, run->msr.data); 5221 run->msr.error = r ? 0 : 1; 5222 return 0; 5223 } 5224 } 5225 } 5226 5227 assert(false); 5228 } 5229 5230 static bool has_sgx_provisioning; 5231 5232 static bool __kvm_enable_sgx_provisioning(KVMState *s) 5233 { 5234 int fd, ret; 5235 5236 if (!kvm_vm_check_extension(s, KVM_CAP_SGX_ATTRIBUTE)) { 5237 return false; 5238 } 5239 5240 fd = qemu_open_old("/dev/sgx_provision", O_RDONLY); 5241 if (fd < 0) { 5242 return false; 5243 } 5244 5245 ret = kvm_vm_enable_cap(s, KVM_CAP_SGX_ATTRIBUTE, 0, fd); 5246 if (ret) { 5247 error_report("Could not enable SGX PROVISIONKEY: %s", strerror(-ret)); 5248 exit(1); 5249 } 5250 close(fd); 5251 return true; 5252 } 5253 5254 bool kvm_enable_sgx_provisioning(KVMState *s) 5255 { 5256 return MEMORIZE(__kvm_enable_sgx_provisioning(s), has_sgx_provisioning); 5257 } 5258 5259 static bool host_supports_vmx(void) 5260 { 5261 uint32_t ecx, unused; 5262 5263 host_cpuid(1, 0, &unused, &unused, &ecx, &unused); 5264 return ecx & CPUID_EXT_VMX; 5265 } 5266 5267 #define VMX_INVALID_GUEST_STATE 0x80000021 5268 5269 int kvm_arch_handle_exit(CPUState *cs, struct kvm_run *run) 5270 { 5271 X86CPU *cpu = X86_CPU(cs); 5272 uint64_t code; 5273 int ret; 5274 bool ctx_invalid; 5275 char str[256]; 5276 KVMState *state; 5277 5278 switch (run->exit_reason) { 5279 case KVM_EXIT_HLT: 5280 DPRINTF("handle_hlt\n"); 5281 qemu_mutex_lock_iothread(); 5282 ret = kvm_handle_halt(cpu); 5283 qemu_mutex_unlock_iothread(); 5284 break; 5285 case KVM_EXIT_SET_TPR: 5286 ret = 0; 5287 break; 5288 case KVM_EXIT_TPR_ACCESS: 5289 qemu_mutex_lock_iothread(); 5290 ret = kvm_handle_tpr_access(cpu); 5291 qemu_mutex_unlock_iothread(); 5292 break; 5293 case KVM_EXIT_FAIL_ENTRY: 5294 code = run->fail_entry.hardware_entry_failure_reason; 5295 fprintf(stderr, "KVM: entry failed, hardware error 0x%" PRIx64 "\n", 5296 code); 5297 if (host_supports_vmx() && code == VMX_INVALID_GUEST_STATE) { 5298 fprintf(stderr, 5299 "\nIf you're running a guest on an Intel machine without " 5300 "unrestricted mode\n" 5301 "support, the failure can be most likely due to the guest " 5302 "entering an invalid\n" 5303 "state for Intel VT. For example, the guest maybe running " 5304 "in big real mode\n" 5305 "which is not supported on less recent Intel processors." 5306 "\n\n"); 5307 } 5308 ret = -1; 5309 break; 5310 case KVM_EXIT_EXCEPTION: 5311 fprintf(stderr, "KVM: exception %d exit (error code 0x%x)\n", 5312 run->ex.exception, run->ex.error_code); 5313 ret = -1; 5314 break; 5315 case KVM_EXIT_DEBUG: 5316 DPRINTF("kvm_exit_debug\n"); 5317 qemu_mutex_lock_iothread(); 5318 ret = kvm_handle_debug(cpu, &run->debug.arch); 5319 qemu_mutex_unlock_iothread(); 5320 break; 5321 case KVM_EXIT_HYPERV: 5322 ret = kvm_hv_handle_exit(cpu, &run->hyperv); 5323 break; 5324 case KVM_EXIT_IOAPIC_EOI: 5325 ioapic_eoi_broadcast(run->eoi.vector); 5326 ret = 0; 5327 break; 5328 case KVM_EXIT_X86_BUS_LOCK: 5329 /* already handled in kvm_arch_post_run */ 5330 ret = 0; 5331 break; 5332 case KVM_EXIT_NOTIFY: 5333 ctx_invalid = !!(run->notify.flags & KVM_NOTIFY_CONTEXT_INVALID); 5334 state = KVM_STATE(current_accel()); 5335 sprintf(str, "Encounter a notify exit with %svalid context in" 5336 " guest. There can be possible misbehaves in guest." 5337 " Please have a look.", ctx_invalid ? "in" : ""); 5338 if (ctx_invalid || 5339 state->notify_vmexit == NOTIFY_VMEXIT_OPTION_INTERNAL_ERROR) { 5340 warn_report("KVM internal error: %s", str); 5341 ret = -1; 5342 } else { 5343 warn_report_once("KVM: %s", str); 5344 ret = 0; 5345 } 5346 break; 5347 case KVM_EXIT_X86_RDMSR: 5348 /* We only enable MSR filtering, any other exit is bogus */ 5349 assert(run->msr.reason == KVM_MSR_EXIT_REASON_FILTER); 5350 ret = kvm_handle_rdmsr(cpu, run); 5351 break; 5352 case KVM_EXIT_X86_WRMSR: 5353 /* We only enable MSR filtering, any other exit is bogus */ 5354 assert(run->msr.reason == KVM_MSR_EXIT_REASON_FILTER); 5355 ret = kvm_handle_wrmsr(cpu, run); 5356 break; 5357 #ifdef CONFIG_XEN_EMU 5358 case KVM_EXIT_XEN: 5359 ret = kvm_xen_handle_exit(cpu, &run->xen); 5360 break; 5361 #endif 5362 default: 5363 fprintf(stderr, "KVM: unknown exit reason %d\n", run->exit_reason); 5364 ret = -1; 5365 break; 5366 } 5367 5368 return ret; 5369 } 5370 5371 bool kvm_arch_stop_on_emulation_error(CPUState *cs) 5372 { 5373 X86CPU *cpu = X86_CPU(cs); 5374 CPUX86State *env = &cpu->env; 5375 5376 kvm_cpu_synchronize_state(cs); 5377 return !(env->cr[0] & CR0_PE_MASK) || 5378 ((env->segs[R_CS].selector & 3) != 3); 5379 } 5380 5381 void kvm_arch_init_irq_routing(KVMState *s) 5382 { 5383 /* We know at this point that we're using the in-kernel 5384 * irqchip, so we can use irqfds, and on x86 we know 5385 * we can use msi via irqfd and GSI routing. 5386 */ 5387 kvm_msi_via_irqfd_allowed = true; 5388 kvm_gsi_routing_allowed = true; 5389 5390 if (kvm_irqchip_is_split()) { 5391 KVMRouteChange c = kvm_irqchip_begin_route_changes(s); 5392 int i; 5393 5394 /* If the ioapic is in QEMU and the lapics are in KVM, reserve 5395 MSI routes for signaling interrupts to the local apics. */ 5396 for (i = 0; i < IOAPIC_NUM_PINS; i++) { 5397 if (kvm_irqchip_add_msi_route(&c, 0, NULL) < 0) { 5398 error_report("Could not enable split IRQ mode."); 5399 exit(1); 5400 } 5401 } 5402 kvm_irqchip_commit_route_changes(&c); 5403 } 5404 } 5405 5406 int kvm_arch_irqchip_create(KVMState *s) 5407 { 5408 int ret; 5409 if (kvm_kernel_irqchip_split()) { 5410 ret = kvm_vm_enable_cap(s, KVM_CAP_SPLIT_IRQCHIP, 0, 24); 5411 if (ret) { 5412 error_report("Could not enable split irqchip mode: %s", 5413 strerror(-ret)); 5414 exit(1); 5415 } else { 5416 DPRINTF("Enabled KVM_CAP_SPLIT_IRQCHIP\n"); 5417 kvm_split_irqchip = true; 5418 return 1; 5419 } 5420 } else { 5421 return 0; 5422 } 5423 } 5424 5425 uint64_t kvm_swizzle_msi_ext_dest_id(uint64_t address) 5426 { 5427 CPUX86State *env; 5428 uint64_t ext_id; 5429 5430 if (!first_cpu) { 5431 return address; 5432 } 5433 env = &X86_CPU(first_cpu)->env; 5434 if (!(env->features[FEAT_KVM] & (1 << KVM_FEATURE_MSI_EXT_DEST_ID))) { 5435 return address; 5436 } 5437 5438 /* 5439 * If the remappable format bit is set, or the upper bits are 5440 * already set in address_hi, or the low extended bits aren't 5441 * there anyway, do nothing. 5442 */ 5443 ext_id = address & (0xff << MSI_ADDR_DEST_IDX_SHIFT); 5444 if (!ext_id || (ext_id & (1 << MSI_ADDR_DEST_IDX_SHIFT)) || (address >> 32)) { 5445 return address; 5446 } 5447 5448 address &= ~ext_id; 5449 address |= ext_id << 35; 5450 return address; 5451 } 5452 5453 int kvm_arch_fixup_msi_route(struct kvm_irq_routing_entry *route, 5454 uint64_t address, uint32_t data, PCIDevice *dev) 5455 { 5456 X86IOMMUState *iommu = x86_iommu_get_default(); 5457 5458 if (iommu) { 5459 X86IOMMUClass *class = X86_IOMMU_DEVICE_GET_CLASS(iommu); 5460 5461 if (class->int_remap) { 5462 int ret; 5463 MSIMessage src, dst; 5464 5465 src.address = route->u.msi.address_hi; 5466 src.address <<= VTD_MSI_ADDR_HI_SHIFT; 5467 src.address |= route->u.msi.address_lo; 5468 src.data = route->u.msi.data; 5469 5470 ret = class->int_remap(iommu, &src, &dst, dev ? \ 5471 pci_requester_id(dev) : \ 5472 X86_IOMMU_SID_INVALID); 5473 if (ret) { 5474 trace_kvm_x86_fixup_msi_error(route->gsi); 5475 return 1; 5476 } 5477 5478 /* 5479 * Handled untranslated compatibility format interrupt with 5480 * extended destination ID in the low bits 11-5. */ 5481 dst.address = kvm_swizzle_msi_ext_dest_id(dst.address); 5482 5483 route->u.msi.address_hi = dst.address >> VTD_MSI_ADDR_HI_SHIFT; 5484 route->u.msi.address_lo = dst.address & VTD_MSI_ADDR_LO_MASK; 5485 route->u.msi.data = dst.data; 5486 return 0; 5487 } 5488 } 5489 5490 #ifdef CONFIG_XEN_EMU 5491 if (xen_mode == XEN_EMULATE) { 5492 int handled = xen_evtchn_translate_pirq_msi(route, address, data); 5493 5494 /* 5495 * If it was a PIRQ and successfully routed (handled == 0) or it was 5496 * an error (handled < 0), return. If it wasn't a PIRQ, keep going. 5497 */ 5498 if (handled <= 0) { 5499 return handled; 5500 } 5501 } 5502 #endif 5503 5504 address = kvm_swizzle_msi_ext_dest_id(address); 5505 route->u.msi.address_hi = address >> VTD_MSI_ADDR_HI_SHIFT; 5506 route->u.msi.address_lo = address & VTD_MSI_ADDR_LO_MASK; 5507 return 0; 5508 } 5509 5510 typedef struct MSIRouteEntry MSIRouteEntry; 5511 5512 struct MSIRouteEntry { 5513 PCIDevice *dev; /* Device pointer */ 5514 int vector; /* MSI/MSIX vector index */ 5515 int virq; /* Virtual IRQ index */ 5516 QLIST_ENTRY(MSIRouteEntry) list; 5517 }; 5518 5519 /* List of used GSI routes */ 5520 static QLIST_HEAD(, MSIRouteEntry) msi_route_list = \ 5521 QLIST_HEAD_INITIALIZER(msi_route_list); 5522 5523 void kvm_update_msi_routes_all(void *private, bool global, 5524 uint32_t index, uint32_t mask) 5525 { 5526 int cnt = 0, vector; 5527 MSIRouteEntry *entry; 5528 MSIMessage msg; 5529 PCIDevice *dev; 5530 5531 /* TODO: explicit route update */ 5532 QLIST_FOREACH(entry, &msi_route_list, list) { 5533 cnt++; 5534 vector = entry->vector; 5535 dev = entry->dev; 5536 if (msix_enabled(dev) && !msix_is_masked(dev, vector)) { 5537 msg = msix_get_message(dev, vector); 5538 } else if (msi_enabled(dev) && !msi_is_masked(dev, vector)) { 5539 msg = msi_get_message(dev, vector); 5540 } else { 5541 /* 5542 * Either MSI/MSIX is disabled for the device, or the 5543 * specific message was masked out. Skip this one. 5544 */ 5545 continue; 5546 } 5547 kvm_irqchip_update_msi_route(kvm_state, entry->virq, msg, dev); 5548 } 5549 kvm_irqchip_commit_routes(kvm_state); 5550 trace_kvm_x86_update_msi_routes(cnt); 5551 } 5552 5553 int kvm_arch_add_msi_route_post(struct kvm_irq_routing_entry *route, 5554 int vector, PCIDevice *dev) 5555 { 5556 static bool notify_list_inited = false; 5557 MSIRouteEntry *entry; 5558 5559 if (!dev) { 5560 /* These are (possibly) IOAPIC routes only used for split 5561 * kernel irqchip mode, while what we are housekeeping are 5562 * PCI devices only. */ 5563 return 0; 5564 } 5565 5566 entry = g_new0(MSIRouteEntry, 1); 5567 entry->dev = dev; 5568 entry->vector = vector; 5569 entry->virq = route->gsi; 5570 QLIST_INSERT_HEAD(&msi_route_list, entry, list); 5571 5572 trace_kvm_x86_add_msi_route(route->gsi); 5573 5574 if (!notify_list_inited) { 5575 /* For the first time we do add route, add ourselves into 5576 * IOMMU's IEC notify list if needed. */ 5577 X86IOMMUState *iommu = x86_iommu_get_default(); 5578 if (iommu) { 5579 x86_iommu_iec_register_notifier(iommu, 5580 kvm_update_msi_routes_all, 5581 NULL); 5582 } 5583 notify_list_inited = true; 5584 } 5585 return 0; 5586 } 5587 5588 int kvm_arch_release_virq_post(int virq) 5589 { 5590 MSIRouteEntry *entry, *next; 5591 QLIST_FOREACH_SAFE(entry, &msi_route_list, list, next) { 5592 if (entry->virq == virq) { 5593 trace_kvm_x86_remove_msi_route(virq); 5594 QLIST_REMOVE(entry, list); 5595 g_free(entry); 5596 break; 5597 } 5598 } 5599 return 0; 5600 } 5601 5602 int kvm_arch_msi_data_to_gsi(uint32_t data) 5603 { 5604 abort(); 5605 } 5606 5607 bool kvm_has_waitpkg(void) 5608 { 5609 return has_msr_umwait; 5610 } 5611 5612 bool kvm_arch_cpu_check_are_resettable(void) 5613 { 5614 return !sev_es_enabled(); 5615 } 5616 5617 #define ARCH_REQ_XCOMP_GUEST_PERM 0x1025 5618 5619 void kvm_request_xsave_components(X86CPU *cpu, uint64_t mask) 5620 { 5621 KVMState *s = kvm_state; 5622 uint64_t supported; 5623 5624 mask &= XSTATE_DYNAMIC_MASK; 5625 if (!mask) { 5626 return; 5627 } 5628 /* 5629 * Just ignore bits that are not in CPUID[EAX=0xD,ECX=0]. 5630 * ARCH_REQ_XCOMP_GUEST_PERM would fail, and QEMU has warned 5631 * about them already because they are not supported features. 5632 */ 5633 supported = kvm_arch_get_supported_cpuid(s, 0xd, 0, R_EAX); 5634 supported |= (uint64_t)kvm_arch_get_supported_cpuid(s, 0xd, 0, R_EDX) << 32; 5635 mask &= supported; 5636 5637 while (mask) { 5638 int bit = ctz64(mask); 5639 int rc = syscall(SYS_arch_prctl, ARCH_REQ_XCOMP_GUEST_PERM, bit); 5640 if (rc) { 5641 /* 5642 * Older kernel version (<5.17) do not support 5643 * ARCH_REQ_XCOMP_GUEST_PERM, but also do not return 5644 * any dynamic feature from kvm_arch_get_supported_cpuid. 5645 */ 5646 warn_report("prctl(ARCH_REQ_XCOMP_GUEST_PERM) failure " 5647 "for feature bit %d", bit); 5648 } 5649 mask &= ~BIT_ULL(bit); 5650 } 5651 } 5652 5653 static int kvm_arch_get_notify_vmexit(Object *obj, Error **errp) 5654 { 5655 KVMState *s = KVM_STATE(obj); 5656 return s->notify_vmexit; 5657 } 5658 5659 static void kvm_arch_set_notify_vmexit(Object *obj, int value, Error **errp) 5660 { 5661 KVMState *s = KVM_STATE(obj); 5662 5663 if (s->fd != -1) { 5664 error_setg(errp, "Cannot set properties after the accelerator has been initialized"); 5665 return; 5666 } 5667 5668 s->notify_vmexit = value; 5669 } 5670 5671 static void kvm_arch_get_notify_window(Object *obj, Visitor *v, 5672 const char *name, void *opaque, 5673 Error **errp) 5674 { 5675 KVMState *s = KVM_STATE(obj); 5676 uint32_t value = s->notify_window; 5677 5678 visit_type_uint32(v, name, &value, errp); 5679 } 5680 5681 static void kvm_arch_set_notify_window(Object *obj, Visitor *v, 5682 const char *name, void *opaque, 5683 Error **errp) 5684 { 5685 KVMState *s = KVM_STATE(obj); 5686 uint32_t value; 5687 5688 if (s->fd != -1) { 5689 error_setg(errp, "Cannot set properties after the accelerator has been initialized"); 5690 return; 5691 } 5692 5693 if (!visit_type_uint32(v, name, &value, errp)) { 5694 return; 5695 } 5696 5697 s->notify_window = value; 5698 } 5699 5700 static void kvm_arch_get_xen_version(Object *obj, Visitor *v, 5701 const char *name, void *opaque, 5702 Error **errp) 5703 { 5704 KVMState *s = KVM_STATE(obj); 5705 uint32_t value = s->xen_version; 5706 5707 visit_type_uint32(v, name, &value, errp); 5708 } 5709 5710 static void kvm_arch_set_xen_version(Object *obj, Visitor *v, 5711 const char *name, void *opaque, 5712 Error **errp) 5713 { 5714 KVMState *s = KVM_STATE(obj); 5715 Error *error = NULL; 5716 uint32_t value; 5717 5718 visit_type_uint32(v, name, &value, &error); 5719 if (error) { 5720 error_propagate(errp, error); 5721 return; 5722 } 5723 5724 s->xen_version = value; 5725 if (value && xen_mode == XEN_DISABLED) { 5726 xen_mode = XEN_EMULATE; 5727 } 5728 } 5729 5730 static void kvm_arch_get_xen_gnttab_max_frames(Object *obj, Visitor *v, 5731 const char *name, void *opaque, 5732 Error **errp) 5733 { 5734 KVMState *s = KVM_STATE(obj); 5735 uint16_t value = s->xen_gnttab_max_frames; 5736 5737 visit_type_uint16(v, name, &value, errp); 5738 } 5739 5740 static void kvm_arch_set_xen_gnttab_max_frames(Object *obj, Visitor *v, 5741 const char *name, void *opaque, 5742 Error **errp) 5743 { 5744 KVMState *s = KVM_STATE(obj); 5745 Error *error = NULL; 5746 uint16_t value; 5747 5748 visit_type_uint16(v, name, &value, &error); 5749 if (error) { 5750 error_propagate(errp, error); 5751 return; 5752 } 5753 5754 s->xen_gnttab_max_frames = value; 5755 } 5756 5757 static void kvm_arch_get_xen_evtchn_max_pirq(Object *obj, Visitor *v, 5758 const char *name, void *opaque, 5759 Error **errp) 5760 { 5761 KVMState *s = KVM_STATE(obj); 5762 uint16_t value = s->xen_evtchn_max_pirq; 5763 5764 visit_type_uint16(v, name, &value, errp); 5765 } 5766 5767 static void kvm_arch_set_xen_evtchn_max_pirq(Object *obj, Visitor *v, 5768 const char *name, void *opaque, 5769 Error **errp) 5770 { 5771 KVMState *s = KVM_STATE(obj); 5772 Error *error = NULL; 5773 uint16_t value; 5774 5775 visit_type_uint16(v, name, &value, &error); 5776 if (error) { 5777 error_propagate(errp, error); 5778 return; 5779 } 5780 5781 s->xen_evtchn_max_pirq = value; 5782 } 5783 5784 void kvm_arch_accel_class_init(ObjectClass *oc) 5785 { 5786 object_class_property_add_enum(oc, "notify-vmexit", "NotifyVMexitOption", 5787 &NotifyVmexitOption_lookup, 5788 kvm_arch_get_notify_vmexit, 5789 kvm_arch_set_notify_vmexit); 5790 object_class_property_set_description(oc, "notify-vmexit", 5791 "Enable notify VM exit"); 5792 5793 object_class_property_add(oc, "notify-window", "uint32", 5794 kvm_arch_get_notify_window, 5795 kvm_arch_set_notify_window, 5796 NULL, NULL); 5797 object_class_property_set_description(oc, "notify-window", 5798 "Clock cycles without an event window " 5799 "after which a notification VM exit occurs"); 5800 5801 object_class_property_add(oc, "xen-version", "uint32", 5802 kvm_arch_get_xen_version, 5803 kvm_arch_set_xen_version, 5804 NULL, NULL); 5805 object_class_property_set_description(oc, "xen-version", 5806 "Xen version to be emulated " 5807 "(in XENVER_version form " 5808 "e.g. 0x4000a for 4.10)"); 5809 5810 object_class_property_add(oc, "xen-gnttab-max-frames", "uint16", 5811 kvm_arch_get_xen_gnttab_max_frames, 5812 kvm_arch_set_xen_gnttab_max_frames, 5813 NULL, NULL); 5814 object_class_property_set_description(oc, "xen-gnttab-max-frames", 5815 "Maximum number of grant table frames"); 5816 5817 object_class_property_add(oc, "xen-evtchn-max-pirq", "uint16", 5818 kvm_arch_get_xen_evtchn_max_pirq, 5819 kvm_arch_set_xen_evtchn_max_pirq, 5820 NULL, NULL); 5821 object_class_property_set_description(oc, "xen-evtchn-max-pirq", 5822 "Maximum number of Xen PIRQs"); 5823 } 5824 5825 void kvm_set_max_apic_id(uint32_t max_apic_id) 5826 { 5827 kvm_vm_enable_cap(kvm_state, KVM_CAP_MAX_VCPU_ID, 0, max_apic_id); 5828 } 5829