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 break; 1918 } 1919 /* fallthrough */ 1920 case 4: 1921 case 0xb: 1922 case 0xd: 1923 for (j = 0; ; j++) { 1924 if (i == 0xd && j == 64) { 1925 break; 1926 } 1927 1928 if (i == 0x1f && j == 64) { 1929 break; 1930 } 1931 1932 c->function = i; 1933 c->flags = KVM_CPUID_FLAG_SIGNIFCANT_INDEX; 1934 c->index = j; 1935 cpu_x86_cpuid(env, i, j, &c->eax, &c->ebx, &c->ecx, &c->edx); 1936 1937 if (i == 4 && c->eax == 0) { 1938 break; 1939 } 1940 if (i == 0xb && !(c->ecx & 0xff00)) { 1941 break; 1942 } 1943 if (i == 0x1f && !(c->ecx & 0xff00)) { 1944 break; 1945 } 1946 if (i == 0xd && c->eax == 0) { 1947 continue; 1948 } 1949 if (cpuid_i == KVM_MAX_CPUID_ENTRIES) { 1950 fprintf(stderr, "cpuid_data is full, no space for " 1951 "cpuid(eax:0x%x,ecx:0x%x)\n", i, j); 1952 abort(); 1953 } 1954 c = &cpuid_data.entries[cpuid_i++]; 1955 } 1956 break; 1957 case 0x7: 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 0x14: 1978 case 0x1d: 1979 case 0x1e: { 1980 uint32_t times; 1981 1982 c->function = i; 1983 c->index = 0; 1984 c->flags = KVM_CPUID_FLAG_SIGNIFCANT_INDEX; 1985 cpu_x86_cpuid(env, i, 0, &c->eax, &c->ebx, &c->ecx, &c->edx); 1986 times = c->eax; 1987 1988 for (j = 1; j <= times; ++j) { 1989 if (cpuid_i == KVM_MAX_CPUID_ENTRIES) { 1990 fprintf(stderr, "cpuid_data is full, no space for " 1991 "cpuid(eax:0x%x,ecx:0x%x)\n", i, j); 1992 abort(); 1993 } 1994 c = &cpuid_data.entries[cpuid_i++]; 1995 c->function = i; 1996 c->index = j; 1997 c->flags = KVM_CPUID_FLAG_SIGNIFCANT_INDEX; 1998 cpu_x86_cpuid(env, i, j, &c->eax, &c->ebx, &c->ecx, &c->edx); 1999 } 2000 break; 2001 } 2002 default: 2003 c->function = i; 2004 c->flags = 0; 2005 cpu_x86_cpuid(env, i, 0, &c->eax, &c->ebx, &c->ecx, &c->edx); 2006 if (!c->eax && !c->ebx && !c->ecx && !c->edx) { 2007 /* 2008 * KVM already returns all zeroes if a CPUID entry is missing, 2009 * so we can omit it and avoid hitting KVM's 80-entry limit. 2010 */ 2011 cpuid_i--; 2012 } 2013 break; 2014 } 2015 } 2016 2017 if (limit >= 0x0a) { 2018 uint32_t eax, edx; 2019 2020 cpu_x86_cpuid(env, 0x0a, 0, &eax, &unused, &unused, &edx); 2021 2022 has_architectural_pmu_version = eax & 0xff; 2023 if (has_architectural_pmu_version > 0) { 2024 num_architectural_pmu_gp_counters = (eax & 0xff00) >> 8; 2025 2026 /* Shouldn't be more than 32, since that's the number of bits 2027 * available in EBX to tell us _which_ counters are available. 2028 * Play it safe. 2029 */ 2030 if (num_architectural_pmu_gp_counters > MAX_GP_COUNTERS) { 2031 num_architectural_pmu_gp_counters = MAX_GP_COUNTERS; 2032 } 2033 2034 if (has_architectural_pmu_version > 1) { 2035 num_architectural_pmu_fixed_counters = edx & 0x1f; 2036 2037 if (num_architectural_pmu_fixed_counters > MAX_FIXED_COUNTERS) { 2038 num_architectural_pmu_fixed_counters = MAX_FIXED_COUNTERS; 2039 } 2040 } 2041 } 2042 } 2043 2044 cpu_x86_cpuid(env, 0x80000000, 0, &limit, &unused, &unused, &unused); 2045 2046 for (i = 0x80000000; i <= limit; i++) { 2047 if (cpuid_i == KVM_MAX_CPUID_ENTRIES) { 2048 fprintf(stderr, "unsupported xlevel value: 0x%x\n", limit); 2049 abort(); 2050 } 2051 c = &cpuid_data.entries[cpuid_i++]; 2052 2053 switch (i) { 2054 case 0x8000001d: 2055 /* Query for all AMD cache information leaves */ 2056 for (j = 0; ; j++) { 2057 c->function = i; 2058 c->flags = KVM_CPUID_FLAG_SIGNIFCANT_INDEX; 2059 c->index = j; 2060 cpu_x86_cpuid(env, i, j, &c->eax, &c->ebx, &c->ecx, &c->edx); 2061 2062 if (c->eax == 0) { 2063 break; 2064 } 2065 if (cpuid_i == KVM_MAX_CPUID_ENTRIES) { 2066 fprintf(stderr, "cpuid_data is full, no space for " 2067 "cpuid(eax:0x%x,ecx:0x%x)\n", i, j); 2068 abort(); 2069 } 2070 c = &cpuid_data.entries[cpuid_i++]; 2071 } 2072 break; 2073 default: 2074 c->function = i; 2075 c->flags = 0; 2076 cpu_x86_cpuid(env, i, 0, &c->eax, &c->ebx, &c->ecx, &c->edx); 2077 if (!c->eax && !c->ebx && !c->ecx && !c->edx) { 2078 /* 2079 * KVM already returns all zeroes if a CPUID entry is missing, 2080 * so we can omit it and avoid hitting KVM's 80-entry limit. 2081 */ 2082 cpuid_i--; 2083 } 2084 break; 2085 } 2086 } 2087 2088 /* Call Centaur's CPUID instructions they are supported. */ 2089 if (env->cpuid_xlevel2 > 0) { 2090 cpu_x86_cpuid(env, 0xC0000000, 0, &limit, &unused, &unused, &unused); 2091 2092 for (i = 0xC0000000; i <= limit; i++) { 2093 if (cpuid_i == KVM_MAX_CPUID_ENTRIES) { 2094 fprintf(stderr, "unsupported xlevel2 value: 0x%x\n", limit); 2095 abort(); 2096 } 2097 c = &cpuid_data.entries[cpuid_i++]; 2098 2099 c->function = i; 2100 c->flags = 0; 2101 cpu_x86_cpuid(env, i, 0, &c->eax, &c->ebx, &c->ecx, &c->edx); 2102 } 2103 } 2104 2105 cpuid_data.cpuid.nent = cpuid_i; 2106 2107 if (((env->cpuid_version >> 8)&0xF) >= 6 2108 && (env->features[FEAT_1_EDX] & (CPUID_MCE | CPUID_MCA)) == 2109 (CPUID_MCE | CPUID_MCA)) { 2110 uint64_t mcg_cap, unsupported_caps; 2111 int banks; 2112 int ret; 2113 2114 ret = kvm_get_mce_cap_supported(cs->kvm_state, &mcg_cap, &banks); 2115 if (ret < 0) { 2116 fprintf(stderr, "kvm_get_mce_cap_supported: %s", strerror(-ret)); 2117 return ret; 2118 } 2119 2120 if (banks < (env->mcg_cap & MCG_CAP_BANKS_MASK)) { 2121 error_report("kvm: Unsupported MCE bank count (QEMU = %d, KVM = %d)", 2122 (int)(env->mcg_cap & MCG_CAP_BANKS_MASK), banks); 2123 return -ENOTSUP; 2124 } 2125 2126 unsupported_caps = env->mcg_cap & ~(mcg_cap | MCG_CAP_BANKS_MASK); 2127 if (unsupported_caps) { 2128 if (unsupported_caps & MCG_LMCE_P) { 2129 error_report("kvm: LMCE not supported"); 2130 return -ENOTSUP; 2131 } 2132 warn_report("Unsupported MCG_CAP bits: 0x%" PRIx64, 2133 unsupported_caps); 2134 } 2135 2136 env->mcg_cap &= mcg_cap | MCG_CAP_BANKS_MASK; 2137 ret = kvm_vcpu_ioctl(cs, KVM_X86_SETUP_MCE, &env->mcg_cap); 2138 if (ret < 0) { 2139 fprintf(stderr, "KVM_X86_SETUP_MCE: %s", strerror(-ret)); 2140 return ret; 2141 } 2142 } 2143 2144 cpu->vmsentry = qemu_add_vm_change_state_handler(cpu_update_state, env); 2145 2146 c = cpuid_find_entry(&cpuid_data.cpuid, 1, 0); 2147 if (c) { 2148 has_msr_feature_control = !!(c->ecx & CPUID_EXT_VMX) || 2149 !!(c->ecx & CPUID_EXT_SMX); 2150 } 2151 2152 c = cpuid_find_entry(&cpuid_data.cpuid, 7, 0); 2153 if (c && (c->ebx & CPUID_7_0_EBX_SGX)) { 2154 has_msr_feature_control = true; 2155 } 2156 2157 if (env->mcg_cap & MCG_LMCE_P) { 2158 has_msr_mcg_ext_ctl = has_msr_feature_control = true; 2159 } 2160 2161 if (!env->user_tsc_khz) { 2162 if ((env->features[FEAT_8000_0007_EDX] & CPUID_APM_INVTSC) && 2163 invtsc_mig_blocker == NULL) { 2164 error_setg(&invtsc_mig_blocker, 2165 "State blocked by non-migratable CPU device" 2166 " (invtsc flag)"); 2167 r = migrate_add_blocker(&invtsc_mig_blocker, &local_err); 2168 if (r < 0) { 2169 error_report_err(local_err); 2170 return r; 2171 } 2172 } 2173 } 2174 2175 if (cpu->vmware_cpuid_freq 2176 /* Guests depend on 0x40000000 to detect this feature, so only expose 2177 * it if KVM exposes leaf 0x40000000. (Conflicts with Hyper-V) */ 2178 && cpu->expose_kvm 2179 && kvm_base == KVM_CPUID_SIGNATURE 2180 /* TSC clock must be stable and known for this feature. */ 2181 && tsc_is_stable_and_known(env)) { 2182 2183 c = &cpuid_data.entries[cpuid_i++]; 2184 c->function = KVM_CPUID_SIGNATURE | 0x10; 2185 c->eax = env->tsc_khz; 2186 c->ebx = env->apic_bus_freq / 1000; /* Hz to KHz */ 2187 c->ecx = c->edx = 0; 2188 2189 c = cpuid_find_entry(&cpuid_data.cpuid, kvm_base, 0); 2190 c->eax = MAX(c->eax, KVM_CPUID_SIGNATURE | 0x10); 2191 } 2192 2193 cpuid_data.cpuid.nent = cpuid_i; 2194 2195 cpuid_data.cpuid.padding = 0; 2196 r = kvm_vcpu_ioctl(cs, KVM_SET_CPUID2, &cpuid_data); 2197 if (r) { 2198 goto fail; 2199 } 2200 kvm_init_xsave(env); 2201 2202 max_nested_state_len = kvm_max_nested_state_length(); 2203 if (max_nested_state_len > 0) { 2204 assert(max_nested_state_len >= offsetof(struct kvm_nested_state, data)); 2205 2206 if (cpu_has_vmx(env) || cpu_has_svm(env)) { 2207 env->nested_state = g_malloc0(max_nested_state_len); 2208 env->nested_state->size = max_nested_state_len; 2209 2210 kvm_init_nested_state(env); 2211 } 2212 } 2213 2214 cpu->kvm_msr_buf = g_malloc0(MSR_BUF_SIZE); 2215 2216 if (!(env->features[FEAT_8000_0001_EDX] & CPUID_EXT2_RDTSCP)) { 2217 has_msr_tsc_aux = false; 2218 } 2219 2220 kvm_init_msrs(cpu); 2221 2222 return 0; 2223 2224 fail: 2225 migrate_del_blocker(&invtsc_mig_blocker); 2226 2227 return r; 2228 } 2229 2230 int kvm_arch_destroy_vcpu(CPUState *cs) 2231 { 2232 X86CPU *cpu = X86_CPU(cs); 2233 CPUX86State *env = &cpu->env; 2234 2235 g_free(env->xsave_buf); 2236 2237 g_free(cpu->kvm_msr_buf); 2238 cpu->kvm_msr_buf = NULL; 2239 2240 g_free(env->nested_state); 2241 env->nested_state = NULL; 2242 2243 qemu_del_vm_change_state_handler(cpu->vmsentry); 2244 2245 return 0; 2246 } 2247 2248 void kvm_arch_reset_vcpu(X86CPU *cpu) 2249 { 2250 CPUX86State *env = &cpu->env; 2251 2252 env->xcr0 = 1; 2253 if (kvm_irqchip_in_kernel()) { 2254 env->mp_state = cpu_is_bsp(cpu) ? KVM_MP_STATE_RUNNABLE : 2255 KVM_MP_STATE_UNINITIALIZED; 2256 } else { 2257 env->mp_state = KVM_MP_STATE_RUNNABLE; 2258 } 2259 2260 /* enabled by default */ 2261 env->poll_control_msr = 1; 2262 2263 kvm_init_nested_state(env); 2264 2265 sev_es_set_reset_vector(CPU(cpu)); 2266 } 2267 2268 void kvm_arch_after_reset_vcpu(X86CPU *cpu) 2269 { 2270 CPUX86State *env = &cpu->env; 2271 int i; 2272 2273 /* 2274 * Reset SynIC after all other devices have been reset to let them remove 2275 * their SINT routes first. 2276 */ 2277 if (hyperv_feat_enabled(cpu, HYPERV_FEAT_SYNIC)) { 2278 for (i = 0; i < ARRAY_SIZE(env->msr_hv_synic_sint); i++) { 2279 env->msr_hv_synic_sint[i] = HV_SINT_MASKED; 2280 } 2281 2282 hyperv_x86_synic_reset(cpu); 2283 } 2284 } 2285 2286 void kvm_arch_do_init_vcpu(X86CPU *cpu) 2287 { 2288 CPUX86State *env = &cpu->env; 2289 2290 /* APs get directly into wait-for-SIPI state. */ 2291 if (env->mp_state == KVM_MP_STATE_UNINITIALIZED) { 2292 env->mp_state = KVM_MP_STATE_INIT_RECEIVED; 2293 } 2294 } 2295 2296 static int kvm_get_supported_feature_msrs(KVMState *s) 2297 { 2298 int ret = 0; 2299 2300 if (kvm_feature_msrs != NULL) { 2301 return 0; 2302 } 2303 2304 if (!kvm_check_extension(s, KVM_CAP_GET_MSR_FEATURES)) { 2305 return 0; 2306 } 2307 2308 struct kvm_msr_list msr_list; 2309 2310 msr_list.nmsrs = 0; 2311 ret = kvm_ioctl(s, KVM_GET_MSR_FEATURE_INDEX_LIST, &msr_list); 2312 if (ret < 0 && ret != -E2BIG) { 2313 error_report("Fetch KVM feature MSR list failed: %s", 2314 strerror(-ret)); 2315 return ret; 2316 } 2317 2318 assert(msr_list.nmsrs > 0); 2319 kvm_feature_msrs = g_malloc0(sizeof(msr_list) + 2320 msr_list.nmsrs * sizeof(msr_list.indices[0])); 2321 2322 kvm_feature_msrs->nmsrs = msr_list.nmsrs; 2323 ret = kvm_ioctl(s, KVM_GET_MSR_FEATURE_INDEX_LIST, kvm_feature_msrs); 2324 2325 if (ret < 0) { 2326 error_report("Fetch KVM feature MSR list failed: %s", 2327 strerror(-ret)); 2328 g_free(kvm_feature_msrs); 2329 kvm_feature_msrs = NULL; 2330 return ret; 2331 } 2332 2333 return 0; 2334 } 2335 2336 static int kvm_get_supported_msrs(KVMState *s) 2337 { 2338 int ret = 0; 2339 struct kvm_msr_list msr_list, *kvm_msr_list; 2340 2341 /* 2342 * Obtain MSR list from KVM. These are the MSRs that we must 2343 * save/restore. 2344 */ 2345 msr_list.nmsrs = 0; 2346 ret = kvm_ioctl(s, KVM_GET_MSR_INDEX_LIST, &msr_list); 2347 if (ret < 0 && ret != -E2BIG) { 2348 return ret; 2349 } 2350 /* 2351 * Old kernel modules had a bug and could write beyond the provided 2352 * memory. Allocate at least a safe amount of 1K. 2353 */ 2354 kvm_msr_list = g_malloc0(MAX(1024, sizeof(msr_list) + 2355 msr_list.nmsrs * 2356 sizeof(msr_list.indices[0]))); 2357 2358 kvm_msr_list->nmsrs = msr_list.nmsrs; 2359 ret = kvm_ioctl(s, KVM_GET_MSR_INDEX_LIST, kvm_msr_list); 2360 if (ret >= 0) { 2361 int i; 2362 2363 for (i = 0; i < kvm_msr_list->nmsrs; i++) { 2364 switch (kvm_msr_list->indices[i]) { 2365 case MSR_STAR: 2366 has_msr_star = true; 2367 break; 2368 case MSR_VM_HSAVE_PA: 2369 has_msr_hsave_pa = true; 2370 break; 2371 case MSR_TSC_AUX: 2372 has_msr_tsc_aux = true; 2373 break; 2374 case MSR_TSC_ADJUST: 2375 has_msr_tsc_adjust = true; 2376 break; 2377 case MSR_IA32_TSCDEADLINE: 2378 has_msr_tsc_deadline = true; 2379 break; 2380 case MSR_IA32_SMBASE: 2381 has_msr_smbase = true; 2382 break; 2383 case MSR_SMI_COUNT: 2384 has_msr_smi_count = true; 2385 break; 2386 case MSR_IA32_MISC_ENABLE: 2387 has_msr_misc_enable = true; 2388 break; 2389 case MSR_IA32_BNDCFGS: 2390 has_msr_bndcfgs = true; 2391 break; 2392 case MSR_IA32_XSS: 2393 has_msr_xss = true; 2394 break; 2395 case MSR_IA32_UMWAIT_CONTROL: 2396 has_msr_umwait = true; 2397 break; 2398 case HV_X64_MSR_CRASH_CTL: 2399 has_msr_hv_crash = true; 2400 break; 2401 case HV_X64_MSR_RESET: 2402 has_msr_hv_reset = true; 2403 break; 2404 case HV_X64_MSR_VP_INDEX: 2405 has_msr_hv_vpindex = true; 2406 break; 2407 case HV_X64_MSR_VP_RUNTIME: 2408 has_msr_hv_runtime = true; 2409 break; 2410 case HV_X64_MSR_SCONTROL: 2411 has_msr_hv_synic = true; 2412 break; 2413 case HV_X64_MSR_STIMER0_CONFIG: 2414 has_msr_hv_stimer = true; 2415 break; 2416 case HV_X64_MSR_TSC_FREQUENCY: 2417 has_msr_hv_frequencies = true; 2418 break; 2419 case HV_X64_MSR_REENLIGHTENMENT_CONTROL: 2420 has_msr_hv_reenlightenment = true; 2421 break; 2422 case HV_X64_MSR_SYNDBG_OPTIONS: 2423 has_msr_hv_syndbg_options = true; 2424 break; 2425 case MSR_IA32_SPEC_CTRL: 2426 has_msr_spec_ctrl = true; 2427 break; 2428 case MSR_AMD64_TSC_RATIO: 2429 has_tsc_scale_msr = true; 2430 break; 2431 case MSR_IA32_TSX_CTRL: 2432 has_msr_tsx_ctrl = true; 2433 break; 2434 case MSR_VIRT_SSBD: 2435 has_msr_virt_ssbd = true; 2436 break; 2437 case MSR_IA32_ARCH_CAPABILITIES: 2438 has_msr_arch_capabs = true; 2439 break; 2440 case MSR_IA32_CORE_CAPABILITY: 2441 has_msr_core_capabs = true; 2442 break; 2443 case MSR_IA32_PERF_CAPABILITIES: 2444 has_msr_perf_capabs = true; 2445 break; 2446 case MSR_IA32_VMX_VMFUNC: 2447 has_msr_vmx_vmfunc = true; 2448 break; 2449 case MSR_IA32_UCODE_REV: 2450 has_msr_ucode_rev = true; 2451 break; 2452 case MSR_IA32_VMX_PROCBASED_CTLS2: 2453 has_msr_vmx_procbased_ctls2 = true; 2454 break; 2455 case MSR_IA32_PKRS: 2456 has_msr_pkrs = true; 2457 break; 2458 } 2459 } 2460 } 2461 2462 g_free(kvm_msr_list); 2463 2464 return ret; 2465 } 2466 2467 static bool kvm_rdmsr_core_thread_count(X86CPU *cpu, uint32_t msr, 2468 uint64_t *val) 2469 { 2470 CPUState *cs = CPU(cpu); 2471 2472 *val = cs->nr_threads * cs->nr_cores; /* thread count, bits 15..0 */ 2473 *val |= ((uint32_t)cs->nr_cores << 16); /* core count, bits 31..16 */ 2474 2475 return true; 2476 } 2477 2478 static Notifier smram_machine_done; 2479 static KVMMemoryListener smram_listener; 2480 static AddressSpace smram_address_space; 2481 static MemoryRegion smram_as_root; 2482 static MemoryRegion smram_as_mem; 2483 2484 static void register_smram_listener(Notifier *n, void *unused) 2485 { 2486 MemoryRegion *smram = 2487 (MemoryRegion *) object_resolve_path("/machine/smram", NULL); 2488 2489 /* Outer container... */ 2490 memory_region_init(&smram_as_root, OBJECT(kvm_state), "mem-container-smram", ~0ull); 2491 memory_region_set_enabled(&smram_as_root, true); 2492 2493 /* ... with two regions inside: normal system memory with low 2494 * priority, and... 2495 */ 2496 memory_region_init_alias(&smram_as_mem, OBJECT(kvm_state), "mem-smram", 2497 get_system_memory(), 0, ~0ull); 2498 memory_region_add_subregion_overlap(&smram_as_root, 0, &smram_as_mem, 0); 2499 memory_region_set_enabled(&smram_as_mem, true); 2500 2501 if (smram) { 2502 /* ... SMRAM with higher priority */ 2503 memory_region_add_subregion_overlap(&smram_as_root, 0, smram, 10); 2504 memory_region_set_enabled(smram, true); 2505 } 2506 2507 address_space_init(&smram_address_space, &smram_as_root, "KVM-SMRAM"); 2508 kvm_memory_listener_register(kvm_state, &smram_listener, 2509 &smram_address_space, 1, "kvm-smram"); 2510 } 2511 2512 int kvm_arch_get_default_type(MachineState *ms) 2513 { 2514 return 0; 2515 } 2516 2517 int kvm_arch_init(MachineState *ms, KVMState *s) 2518 { 2519 uint64_t identity_base = 0xfffbc000; 2520 uint64_t shadow_mem; 2521 int ret; 2522 struct utsname utsname; 2523 Error *local_err = NULL; 2524 2525 /* 2526 * Initialize SEV context, if required 2527 * 2528 * If no memory encryption is requested (ms->cgs == NULL) this is 2529 * a no-op. 2530 * 2531 * It's also a no-op if a non-SEV confidential guest support 2532 * mechanism is selected. SEV is the only mechanism available to 2533 * select on x86 at present, so this doesn't arise, but if new 2534 * mechanisms are supported in future (e.g. TDX), they'll need 2535 * their own initialization either here or elsewhere. 2536 */ 2537 ret = sev_kvm_init(ms->cgs, &local_err); 2538 if (ret < 0) { 2539 error_report_err(local_err); 2540 return ret; 2541 } 2542 2543 has_xcrs = kvm_check_extension(s, KVM_CAP_XCRS); 2544 has_sregs2 = kvm_check_extension(s, KVM_CAP_SREGS2) > 0; 2545 2546 hv_vpindex_settable = kvm_check_extension(s, KVM_CAP_HYPERV_VP_INDEX); 2547 2548 has_exception_payload = kvm_check_extension(s, KVM_CAP_EXCEPTION_PAYLOAD); 2549 if (has_exception_payload) { 2550 ret = kvm_vm_enable_cap(s, KVM_CAP_EXCEPTION_PAYLOAD, 0, true); 2551 if (ret < 0) { 2552 error_report("kvm: Failed to enable exception payload cap: %s", 2553 strerror(-ret)); 2554 return ret; 2555 } 2556 } 2557 2558 has_triple_fault_event = kvm_check_extension(s, KVM_CAP_X86_TRIPLE_FAULT_EVENT); 2559 if (has_triple_fault_event) { 2560 ret = kvm_vm_enable_cap(s, KVM_CAP_X86_TRIPLE_FAULT_EVENT, 0, true); 2561 if (ret < 0) { 2562 error_report("kvm: Failed to enable triple fault event cap: %s", 2563 strerror(-ret)); 2564 return ret; 2565 } 2566 } 2567 2568 if (s->xen_version) { 2569 #ifdef CONFIG_XEN_EMU 2570 if (!object_dynamic_cast(OBJECT(ms), TYPE_PC_MACHINE)) { 2571 error_report("kvm: Xen support only available in PC machine"); 2572 return -ENOTSUP; 2573 } 2574 /* hyperv_enabled() doesn't work yet. */ 2575 uint32_t msr = XEN_HYPERCALL_MSR; 2576 ret = kvm_xen_init(s, msr); 2577 if (ret < 0) { 2578 return ret; 2579 } 2580 #else 2581 error_report("kvm: Xen support not enabled in qemu"); 2582 return -ENOTSUP; 2583 #endif 2584 } 2585 2586 ret = kvm_get_supported_msrs(s); 2587 if (ret < 0) { 2588 return ret; 2589 } 2590 2591 kvm_get_supported_feature_msrs(s); 2592 2593 uname(&utsname); 2594 lm_capable_kernel = strcmp(utsname.machine, "x86_64") == 0; 2595 2596 /* 2597 * On older Intel CPUs, KVM uses vm86 mode to emulate 16-bit code directly. 2598 * In order to use vm86 mode, an EPT identity map and a TSS are needed. 2599 * Since these must be part of guest physical memory, we need to allocate 2600 * them, both by setting their start addresses in the kernel and by 2601 * creating a corresponding e820 entry. We need 4 pages before the BIOS, 2602 * so this value allows up to 16M BIOSes. 2603 */ 2604 identity_base = 0xfeffc000; 2605 ret = kvm_vm_ioctl(s, KVM_SET_IDENTITY_MAP_ADDR, &identity_base); 2606 if (ret < 0) { 2607 return ret; 2608 } 2609 2610 /* Set TSS base one page after EPT identity map. */ 2611 ret = kvm_vm_ioctl(s, KVM_SET_TSS_ADDR, identity_base + 0x1000); 2612 if (ret < 0) { 2613 return ret; 2614 } 2615 2616 /* Tell fw_cfg to notify the BIOS to reserve the range. */ 2617 ret = e820_add_entry(identity_base, 0x4000, E820_RESERVED); 2618 if (ret < 0) { 2619 fprintf(stderr, "e820_add_entry() table is full\n"); 2620 return ret; 2621 } 2622 2623 shadow_mem = object_property_get_int(OBJECT(s), "kvm-shadow-mem", &error_abort); 2624 if (shadow_mem != -1) { 2625 shadow_mem /= 4096; 2626 ret = kvm_vm_ioctl(s, KVM_SET_NR_MMU_PAGES, shadow_mem); 2627 if (ret < 0) { 2628 return ret; 2629 } 2630 } 2631 2632 if (kvm_check_extension(s, KVM_CAP_X86_SMM) && 2633 object_dynamic_cast(OBJECT(ms), TYPE_X86_MACHINE) && 2634 x86_machine_is_smm_enabled(X86_MACHINE(ms))) { 2635 smram_machine_done.notify = register_smram_listener; 2636 qemu_add_machine_init_done_notifier(&smram_machine_done); 2637 } 2638 2639 if (enable_cpu_pm) { 2640 int disable_exits = kvm_check_extension(s, KVM_CAP_X86_DISABLE_EXITS); 2641 /* Work around for kernel header with a typo. TODO: fix header and drop. */ 2642 #if defined(KVM_X86_DISABLE_EXITS_HTL) && !defined(KVM_X86_DISABLE_EXITS_HLT) 2643 #define KVM_X86_DISABLE_EXITS_HLT KVM_X86_DISABLE_EXITS_HTL 2644 #endif 2645 if (disable_exits) { 2646 disable_exits &= (KVM_X86_DISABLE_EXITS_MWAIT | 2647 KVM_X86_DISABLE_EXITS_HLT | 2648 KVM_X86_DISABLE_EXITS_PAUSE | 2649 KVM_X86_DISABLE_EXITS_CSTATE); 2650 } 2651 2652 ret = kvm_vm_enable_cap(s, KVM_CAP_X86_DISABLE_EXITS, 0, 2653 disable_exits); 2654 if (ret < 0) { 2655 error_report("kvm: guest stopping CPU not supported: %s", 2656 strerror(-ret)); 2657 } 2658 } 2659 2660 if (object_dynamic_cast(OBJECT(ms), TYPE_X86_MACHINE)) { 2661 X86MachineState *x86ms = X86_MACHINE(ms); 2662 2663 if (x86ms->bus_lock_ratelimit > 0) { 2664 ret = kvm_check_extension(s, KVM_CAP_X86_BUS_LOCK_EXIT); 2665 if (!(ret & KVM_BUS_LOCK_DETECTION_EXIT)) { 2666 error_report("kvm: bus lock detection unsupported"); 2667 return -ENOTSUP; 2668 } 2669 ret = kvm_vm_enable_cap(s, KVM_CAP_X86_BUS_LOCK_EXIT, 0, 2670 KVM_BUS_LOCK_DETECTION_EXIT); 2671 if (ret < 0) { 2672 error_report("kvm: Failed to enable bus lock detection cap: %s", 2673 strerror(-ret)); 2674 return ret; 2675 } 2676 ratelimit_init(&bus_lock_ratelimit_ctrl); 2677 ratelimit_set_speed(&bus_lock_ratelimit_ctrl, 2678 x86ms->bus_lock_ratelimit, BUS_LOCK_SLICE_TIME); 2679 } 2680 } 2681 2682 if (s->notify_vmexit != NOTIFY_VMEXIT_OPTION_DISABLE && 2683 kvm_check_extension(s, KVM_CAP_X86_NOTIFY_VMEXIT)) { 2684 uint64_t notify_window_flags = 2685 ((uint64_t)s->notify_window << 32) | 2686 KVM_X86_NOTIFY_VMEXIT_ENABLED | 2687 KVM_X86_NOTIFY_VMEXIT_USER; 2688 ret = kvm_vm_enable_cap(s, KVM_CAP_X86_NOTIFY_VMEXIT, 0, 2689 notify_window_flags); 2690 if (ret < 0) { 2691 error_report("kvm: Failed to enable notify vmexit cap: %s", 2692 strerror(-ret)); 2693 return ret; 2694 } 2695 } 2696 if (kvm_vm_check_extension(s, KVM_CAP_X86_USER_SPACE_MSR)) { 2697 bool r; 2698 2699 ret = kvm_vm_enable_cap(s, KVM_CAP_X86_USER_SPACE_MSR, 0, 2700 KVM_MSR_EXIT_REASON_FILTER); 2701 if (ret) { 2702 error_report("Could not enable user space MSRs: %s", 2703 strerror(-ret)); 2704 exit(1); 2705 } 2706 2707 r = kvm_filter_msr(s, MSR_CORE_THREAD_COUNT, 2708 kvm_rdmsr_core_thread_count, NULL); 2709 if (!r) { 2710 error_report("Could not install MSR_CORE_THREAD_COUNT handler: %s", 2711 strerror(-ret)); 2712 exit(1); 2713 } 2714 } 2715 2716 return 0; 2717 } 2718 2719 static void set_v8086_seg(struct kvm_segment *lhs, const SegmentCache *rhs) 2720 { 2721 lhs->selector = rhs->selector; 2722 lhs->base = rhs->base; 2723 lhs->limit = rhs->limit; 2724 lhs->type = 3; 2725 lhs->present = 1; 2726 lhs->dpl = 3; 2727 lhs->db = 0; 2728 lhs->s = 1; 2729 lhs->l = 0; 2730 lhs->g = 0; 2731 lhs->avl = 0; 2732 lhs->unusable = 0; 2733 } 2734 2735 static void set_seg(struct kvm_segment *lhs, const SegmentCache *rhs) 2736 { 2737 unsigned flags = rhs->flags; 2738 lhs->selector = rhs->selector; 2739 lhs->base = rhs->base; 2740 lhs->limit = rhs->limit; 2741 lhs->type = (flags >> DESC_TYPE_SHIFT) & 15; 2742 lhs->present = (flags & DESC_P_MASK) != 0; 2743 lhs->dpl = (flags >> DESC_DPL_SHIFT) & 3; 2744 lhs->db = (flags >> DESC_B_SHIFT) & 1; 2745 lhs->s = (flags & DESC_S_MASK) != 0; 2746 lhs->l = (flags >> DESC_L_SHIFT) & 1; 2747 lhs->g = (flags & DESC_G_MASK) != 0; 2748 lhs->avl = (flags & DESC_AVL_MASK) != 0; 2749 lhs->unusable = !lhs->present; 2750 lhs->padding = 0; 2751 } 2752 2753 static void get_seg(SegmentCache *lhs, const struct kvm_segment *rhs) 2754 { 2755 lhs->selector = rhs->selector; 2756 lhs->base = rhs->base; 2757 lhs->limit = rhs->limit; 2758 lhs->flags = (rhs->type << DESC_TYPE_SHIFT) | 2759 ((rhs->present && !rhs->unusable) * DESC_P_MASK) | 2760 (rhs->dpl << DESC_DPL_SHIFT) | 2761 (rhs->db << DESC_B_SHIFT) | 2762 (rhs->s * DESC_S_MASK) | 2763 (rhs->l << DESC_L_SHIFT) | 2764 (rhs->g * DESC_G_MASK) | 2765 (rhs->avl * DESC_AVL_MASK); 2766 } 2767 2768 static void kvm_getput_reg(__u64 *kvm_reg, target_ulong *qemu_reg, int set) 2769 { 2770 if (set) { 2771 *kvm_reg = *qemu_reg; 2772 } else { 2773 *qemu_reg = *kvm_reg; 2774 } 2775 } 2776 2777 static int kvm_getput_regs(X86CPU *cpu, int set) 2778 { 2779 CPUX86State *env = &cpu->env; 2780 struct kvm_regs regs; 2781 int ret = 0; 2782 2783 if (!set) { 2784 ret = kvm_vcpu_ioctl(CPU(cpu), KVM_GET_REGS, ®s); 2785 if (ret < 0) { 2786 return ret; 2787 } 2788 } 2789 2790 kvm_getput_reg(®s.rax, &env->regs[R_EAX], set); 2791 kvm_getput_reg(®s.rbx, &env->regs[R_EBX], set); 2792 kvm_getput_reg(®s.rcx, &env->regs[R_ECX], set); 2793 kvm_getput_reg(®s.rdx, &env->regs[R_EDX], set); 2794 kvm_getput_reg(®s.rsi, &env->regs[R_ESI], set); 2795 kvm_getput_reg(®s.rdi, &env->regs[R_EDI], set); 2796 kvm_getput_reg(®s.rsp, &env->regs[R_ESP], set); 2797 kvm_getput_reg(®s.rbp, &env->regs[R_EBP], set); 2798 #ifdef TARGET_X86_64 2799 kvm_getput_reg(®s.r8, &env->regs[8], set); 2800 kvm_getput_reg(®s.r9, &env->regs[9], set); 2801 kvm_getput_reg(®s.r10, &env->regs[10], set); 2802 kvm_getput_reg(®s.r11, &env->regs[11], set); 2803 kvm_getput_reg(®s.r12, &env->regs[12], set); 2804 kvm_getput_reg(®s.r13, &env->regs[13], set); 2805 kvm_getput_reg(®s.r14, &env->regs[14], set); 2806 kvm_getput_reg(®s.r15, &env->regs[15], set); 2807 #endif 2808 2809 kvm_getput_reg(®s.rflags, &env->eflags, set); 2810 kvm_getput_reg(®s.rip, &env->eip, set); 2811 2812 if (set) { 2813 ret = kvm_vcpu_ioctl(CPU(cpu), KVM_SET_REGS, ®s); 2814 } 2815 2816 return ret; 2817 } 2818 2819 static int kvm_put_xsave(X86CPU *cpu) 2820 { 2821 CPUX86State *env = &cpu->env; 2822 void *xsave = env->xsave_buf; 2823 2824 x86_cpu_xsave_all_areas(cpu, xsave, env->xsave_buf_len); 2825 2826 return kvm_vcpu_ioctl(CPU(cpu), KVM_SET_XSAVE, xsave); 2827 } 2828 2829 static int kvm_put_xcrs(X86CPU *cpu) 2830 { 2831 CPUX86State *env = &cpu->env; 2832 struct kvm_xcrs xcrs = {}; 2833 2834 if (!has_xcrs) { 2835 return 0; 2836 } 2837 2838 xcrs.nr_xcrs = 1; 2839 xcrs.flags = 0; 2840 xcrs.xcrs[0].xcr = 0; 2841 xcrs.xcrs[0].value = env->xcr0; 2842 return kvm_vcpu_ioctl(CPU(cpu), KVM_SET_XCRS, &xcrs); 2843 } 2844 2845 static int kvm_put_sregs(X86CPU *cpu) 2846 { 2847 CPUX86State *env = &cpu->env; 2848 struct kvm_sregs sregs; 2849 2850 /* 2851 * The interrupt_bitmap is ignored because KVM_SET_SREGS is 2852 * always followed by KVM_SET_VCPU_EVENTS. 2853 */ 2854 memset(sregs.interrupt_bitmap, 0, sizeof(sregs.interrupt_bitmap)); 2855 2856 if ((env->eflags & VM_MASK)) { 2857 set_v8086_seg(&sregs.cs, &env->segs[R_CS]); 2858 set_v8086_seg(&sregs.ds, &env->segs[R_DS]); 2859 set_v8086_seg(&sregs.es, &env->segs[R_ES]); 2860 set_v8086_seg(&sregs.fs, &env->segs[R_FS]); 2861 set_v8086_seg(&sregs.gs, &env->segs[R_GS]); 2862 set_v8086_seg(&sregs.ss, &env->segs[R_SS]); 2863 } else { 2864 set_seg(&sregs.cs, &env->segs[R_CS]); 2865 set_seg(&sregs.ds, &env->segs[R_DS]); 2866 set_seg(&sregs.es, &env->segs[R_ES]); 2867 set_seg(&sregs.fs, &env->segs[R_FS]); 2868 set_seg(&sregs.gs, &env->segs[R_GS]); 2869 set_seg(&sregs.ss, &env->segs[R_SS]); 2870 } 2871 2872 set_seg(&sregs.tr, &env->tr); 2873 set_seg(&sregs.ldt, &env->ldt); 2874 2875 sregs.idt.limit = env->idt.limit; 2876 sregs.idt.base = env->idt.base; 2877 memset(sregs.idt.padding, 0, sizeof sregs.idt.padding); 2878 sregs.gdt.limit = env->gdt.limit; 2879 sregs.gdt.base = env->gdt.base; 2880 memset(sregs.gdt.padding, 0, sizeof sregs.gdt.padding); 2881 2882 sregs.cr0 = env->cr[0]; 2883 sregs.cr2 = env->cr[2]; 2884 sregs.cr3 = env->cr[3]; 2885 sregs.cr4 = env->cr[4]; 2886 2887 sregs.cr8 = cpu_get_apic_tpr(cpu->apic_state); 2888 sregs.apic_base = cpu_get_apic_base(cpu->apic_state); 2889 2890 sregs.efer = env->efer; 2891 2892 return kvm_vcpu_ioctl(CPU(cpu), KVM_SET_SREGS, &sregs); 2893 } 2894 2895 static int kvm_put_sregs2(X86CPU *cpu) 2896 { 2897 CPUX86State *env = &cpu->env; 2898 struct kvm_sregs2 sregs; 2899 int i; 2900 2901 sregs.flags = 0; 2902 2903 if ((env->eflags & VM_MASK)) { 2904 set_v8086_seg(&sregs.cs, &env->segs[R_CS]); 2905 set_v8086_seg(&sregs.ds, &env->segs[R_DS]); 2906 set_v8086_seg(&sregs.es, &env->segs[R_ES]); 2907 set_v8086_seg(&sregs.fs, &env->segs[R_FS]); 2908 set_v8086_seg(&sregs.gs, &env->segs[R_GS]); 2909 set_v8086_seg(&sregs.ss, &env->segs[R_SS]); 2910 } else { 2911 set_seg(&sregs.cs, &env->segs[R_CS]); 2912 set_seg(&sregs.ds, &env->segs[R_DS]); 2913 set_seg(&sregs.es, &env->segs[R_ES]); 2914 set_seg(&sregs.fs, &env->segs[R_FS]); 2915 set_seg(&sregs.gs, &env->segs[R_GS]); 2916 set_seg(&sregs.ss, &env->segs[R_SS]); 2917 } 2918 2919 set_seg(&sregs.tr, &env->tr); 2920 set_seg(&sregs.ldt, &env->ldt); 2921 2922 sregs.idt.limit = env->idt.limit; 2923 sregs.idt.base = env->idt.base; 2924 memset(sregs.idt.padding, 0, sizeof sregs.idt.padding); 2925 sregs.gdt.limit = env->gdt.limit; 2926 sregs.gdt.base = env->gdt.base; 2927 memset(sregs.gdt.padding, 0, sizeof sregs.gdt.padding); 2928 2929 sregs.cr0 = env->cr[0]; 2930 sregs.cr2 = env->cr[2]; 2931 sregs.cr3 = env->cr[3]; 2932 sregs.cr4 = env->cr[4]; 2933 2934 sregs.cr8 = cpu_get_apic_tpr(cpu->apic_state); 2935 sregs.apic_base = cpu_get_apic_base(cpu->apic_state); 2936 2937 sregs.efer = env->efer; 2938 2939 if (env->pdptrs_valid) { 2940 for (i = 0; i < 4; i++) { 2941 sregs.pdptrs[i] = env->pdptrs[i]; 2942 } 2943 sregs.flags |= KVM_SREGS2_FLAGS_PDPTRS_VALID; 2944 } 2945 2946 return kvm_vcpu_ioctl(CPU(cpu), KVM_SET_SREGS2, &sregs); 2947 } 2948 2949 2950 static void kvm_msr_buf_reset(X86CPU *cpu) 2951 { 2952 memset(cpu->kvm_msr_buf, 0, MSR_BUF_SIZE); 2953 } 2954 2955 static void kvm_msr_entry_add(X86CPU *cpu, uint32_t index, uint64_t value) 2956 { 2957 struct kvm_msrs *msrs = cpu->kvm_msr_buf; 2958 void *limit = ((void *)msrs) + MSR_BUF_SIZE; 2959 struct kvm_msr_entry *entry = &msrs->entries[msrs->nmsrs]; 2960 2961 assert((void *)(entry + 1) <= limit); 2962 2963 entry->index = index; 2964 entry->reserved = 0; 2965 entry->data = value; 2966 msrs->nmsrs++; 2967 } 2968 2969 static int kvm_put_one_msr(X86CPU *cpu, int index, uint64_t value) 2970 { 2971 kvm_msr_buf_reset(cpu); 2972 kvm_msr_entry_add(cpu, index, value); 2973 2974 return kvm_vcpu_ioctl(CPU(cpu), KVM_SET_MSRS, cpu->kvm_msr_buf); 2975 } 2976 2977 static int kvm_get_one_msr(X86CPU *cpu, int index, uint64_t *value) 2978 { 2979 int ret; 2980 struct { 2981 struct kvm_msrs info; 2982 struct kvm_msr_entry entries[1]; 2983 } msr_data = { 2984 .info.nmsrs = 1, 2985 .entries[0].index = index, 2986 }; 2987 2988 ret = kvm_vcpu_ioctl(CPU(cpu), KVM_GET_MSRS, &msr_data); 2989 if (ret < 0) { 2990 return ret; 2991 } 2992 assert(ret == 1); 2993 *value = msr_data.entries[0].data; 2994 return ret; 2995 } 2996 void kvm_put_apicbase(X86CPU *cpu, uint64_t value) 2997 { 2998 int ret; 2999 3000 ret = kvm_put_one_msr(cpu, MSR_IA32_APICBASE, value); 3001 assert(ret == 1); 3002 } 3003 3004 static int kvm_put_tscdeadline_msr(X86CPU *cpu) 3005 { 3006 CPUX86State *env = &cpu->env; 3007 int ret; 3008 3009 if (!has_msr_tsc_deadline) { 3010 return 0; 3011 } 3012 3013 ret = kvm_put_one_msr(cpu, MSR_IA32_TSCDEADLINE, env->tsc_deadline); 3014 if (ret < 0) { 3015 return ret; 3016 } 3017 3018 assert(ret == 1); 3019 return 0; 3020 } 3021 3022 /* 3023 * Provide a separate write service for the feature control MSR in order to 3024 * kick the VCPU out of VMXON or even guest mode on reset. This has to be done 3025 * before writing any other state because forcibly leaving nested mode 3026 * invalidates the VCPU state. 3027 */ 3028 static int kvm_put_msr_feature_control(X86CPU *cpu) 3029 { 3030 int ret; 3031 3032 if (!has_msr_feature_control) { 3033 return 0; 3034 } 3035 3036 ret = kvm_put_one_msr(cpu, MSR_IA32_FEATURE_CONTROL, 3037 cpu->env.msr_ia32_feature_control); 3038 if (ret < 0) { 3039 return ret; 3040 } 3041 3042 assert(ret == 1); 3043 return 0; 3044 } 3045 3046 static uint64_t make_vmx_msr_value(uint32_t index, uint32_t features) 3047 { 3048 uint32_t default1, can_be_one, can_be_zero; 3049 uint32_t must_be_one; 3050 3051 switch (index) { 3052 case MSR_IA32_VMX_TRUE_PINBASED_CTLS: 3053 default1 = 0x00000016; 3054 break; 3055 case MSR_IA32_VMX_TRUE_PROCBASED_CTLS: 3056 default1 = 0x0401e172; 3057 break; 3058 case MSR_IA32_VMX_TRUE_ENTRY_CTLS: 3059 default1 = 0x000011ff; 3060 break; 3061 case MSR_IA32_VMX_TRUE_EXIT_CTLS: 3062 default1 = 0x00036dff; 3063 break; 3064 case MSR_IA32_VMX_PROCBASED_CTLS2: 3065 default1 = 0; 3066 break; 3067 default: 3068 abort(); 3069 } 3070 3071 /* If a feature bit is set, the control can be either set or clear. 3072 * Otherwise the value is limited to either 0 or 1 by default1. 3073 */ 3074 can_be_one = features | default1; 3075 can_be_zero = features | ~default1; 3076 must_be_one = ~can_be_zero; 3077 3078 /* 3079 * Bit 0:31 -> 0 if the control bit can be zero (i.e. 1 if it must be one). 3080 * Bit 32:63 -> 1 if the control bit can be one. 3081 */ 3082 return must_be_one | (((uint64_t)can_be_one) << 32); 3083 } 3084 3085 static void kvm_msr_entry_add_vmx(X86CPU *cpu, FeatureWordArray f) 3086 { 3087 uint64_t kvm_vmx_basic = 3088 kvm_arch_get_supported_msr_feature(kvm_state, 3089 MSR_IA32_VMX_BASIC); 3090 3091 if (!kvm_vmx_basic) { 3092 /* If the kernel doesn't support VMX feature (kvm_intel.nested=0), 3093 * then kvm_vmx_basic will be 0 and KVM_SET_MSR will fail. 3094 */ 3095 return; 3096 } 3097 3098 uint64_t kvm_vmx_misc = 3099 kvm_arch_get_supported_msr_feature(kvm_state, 3100 MSR_IA32_VMX_MISC); 3101 uint64_t kvm_vmx_ept_vpid = 3102 kvm_arch_get_supported_msr_feature(kvm_state, 3103 MSR_IA32_VMX_EPT_VPID_CAP); 3104 3105 /* 3106 * If the guest is 64-bit, a value of 1 is allowed for the host address 3107 * space size vmexit control. 3108 */ 3109 uint64_t fixed_vmx_exit = f[FEAT_8000_0001_EDX] & CPUID_EXT2_LM 3110 ? (uint64_t)VMX_VM_EXIT_HOST_ADDR_SPACE_SIZE << 32 : 0; 3111 3112 /* 3113 * Bits 0-30, 32-44 and 50-53 come from the host. KVM should 3114 * not change them for backwards compatibility. 3115 */ 3116 uint64_t fixed_vmx_basic = kvm_vmx_basic & 3117 (MSR_VMX_BASIC_VMCS_REVISION_MASK | 3118 MSR_VMX_BASIC_VMXON_REGION_SIZE_MASK | 3119 MSR_VMX_BASIC_VMCS_MEM_TYPE_MASK); 3120 3121 /* 3122 * Same for bits 0-4 and 25-27. Bits 16-24 (CR3 target count) can 3123 * change in the future but are always zero for now, clear them to be 3124 * future proof. Bits 32-63 in theory could change, though KVM does 3125 * not support dual-monitor treatment and probably never will; mask 3126 * them out as well. 3127 */ 3128 uint64_t fixed_vmx_misc = kvm_vmx_misc & 3129 (MSR_VMX_MISC_PREEMPTION_TIMER_SHIFT_MASK | 3130 MSR_VMX_MISC_MAX_MSR_LIST_SIZE_MASK); 3131 3132 /* 3133 * EPT memory types should not change either, so we do not bother 3134 * adding features for them. 3135 */ 3136 uint64_t fixed_vmx_ept_mask = 3137 (f[FEAT_VMX_SECONDARY_CTLS] & VMX_SECONDARY_EXEC_ENABLE_EPT ? 3138 MSR_VMX_EPT_UC | MSR_VMX_EPT_WB : 0); 3139 uint64_t fixed_vmx_ept_vpid = kvm_vmx_ept_vpid & fixed_vmx_ept_mask; 3140 3141 kvm_msr_entry_add(cpu, MSR_IA32_VMX_TRUE_PROCBASED_CTLS, 3142 make_vmx_msr_value(MSR_IA32_VMX_TRUE_PROCBASED_CTLS, 3143 f[FEAT_VMX_PROCBASED_CTLS])); 3144 kvm_msr_entry_add(cpu, MSR_IA32_VMX_TRUE_PINBASED_CTLS, 3145 make_vmx_msr_value(MSR_IA32_VMX_TRUE_PINBASED_CTLS, 3146 f[FEAT_VMX_PINBASED_CTLS])); 3147 kvm_msr_entry_add(cpu, MSR_IA32_VMX_TRUE_EXIT_CTLS, 3148 make_vmx_msr_value(MSR_IA32_VMX_TRUE_EXIT_CTLS, 3149 f[FEAT_VMX_EXIT_CTLS]) | fixed_vmx_exit); 3150 kvm_msr_entry_add(cpu, MSR_IA32_VMX_TRUE_ENTRY_CTLS, 3151 make_vmx_msr_value(MSR_IA32_VMX_TRUE_ENTRY_CTLS, 3152 f[FEAT_VMX_ENTRY_CTLS])); 3153 kvm_msr_entry_add(cpu, MSR_IA32_VMX_PROCBASED_CTLS2, 3154 make_vmx_msr_value(MSR_IA32_VMX_PROCBASED_CTLS2, 3155 f[FEAT_VMX_SECONDARY_CTLS])); 3156 kvm_msr_entry_add(cpu, MSR_IA32_VMX_EPT_VPID_CAP, 3157 f[FEAT_VMX_EPT_VPID_CAPS] | fixed_vmx_ept_vpid); 3158 kvm_msr_entry_add(cpu, MSR_IA32_VMX_BASIC, 3159 f[FEAT_VMX_BASIC] | fixed_vmx_basic); 3160 kvm_msr_entry_add(cpu, MSR_IA32_VMX_MISC, 3161 f[FEAT_VMX_MISC] | fixed_vmx_misc); 3162 if (has_msr_vmx_vmfunc) { 3163 kvm_msr_entry_add(cpu, MSR_IA32_VMX_VMFUNC, f[FEAT_VMX_VMFUNC]); 3164 } 3165 3166 /* 3167 * Just to be safe, write these with constant values. The CRn_FIXED1 3168 * MSRs are generated by KVM based on the vCPU's CPUID. 3169 */ 3170 kvm_msr_entry_add(cpu, MSR_IA32_VMX_CR0_FIXED0, 3171 CR0_PE_MASK | CR0_PG_MASK | CR0_NE_MASK); 3172 kvm_msr_entry_add(cpu, MSR_IA32_VMX_CR4_FIXED0, 3173 CR4_VMXE_MASK); 3174 3175 if (f[FEAT_VMX_SECONDARY_CTLS] & VMX_SECONDARY_EXEC_TSC_SCALING) { 3176 /* TSC multiplier (0x2032). */ 3177 kvm_msr_entry_add(cpu, MSR_IA32_VMX_VMCS_ENUM, 0x32); 3178 } else { 3179 /* Preemption timer (0x482E). */ 3180 kvm_msr_entry_add(cpu, MSR_IA32_VMX_VMCS_ENUM, 0x2E); 3181 } 3182 } 3183 3184 static void kvm_msr_entry_add_perf(X86CPU *cpu, FeatureWordArray f) 3185 { 3186 uint64_t kvm_perf_cap = 3187 kvm_arch_get_supported_msr_feature(kvm_state, 3188 MSR_IA32_PERF_CAPABILITIES); 3189 3190 if (kvm_perf_cap) { 3191 kvm_msr_entry_add(cpu, MSR_IA32_PERF_CAPABILITIES, 3192 kvm_perf_cap & f[FEAT_PERF_CAPABILITIES]); 3193 } 3194 } 3195 3196 static int kvm_buf_set_msrs(X86CPU *cpu) 3197 { 3198 int ret = kvm_vcpu_ioctl(CPU(cpu), KVM_SET_MSRS, cpu->kvm_msr_buf); 3199 if (ret < 0) { 3200 return ret; 3201 } 3202 3203 if (ret < cpu->kvm_msr_buf->nmsrs) { 3204 struct kvm_msr_entry *e = &cpu->kvm_msr_buf->entries[ret]; 3205 error_report("error: failed to set MSR 0x%" PRIx32 " to 0x%" PRIx64, 3206 (uint32_t)e->index, (uint64_t)e->data); 3207 } 3208 3209 assert(ret == cpu->kvm_msr_buf->nmsrs); 3210 return 0; 3211 } 3212 3213 static void kvm_init_msrs(X86CPU *cpu) 3214 { 3215 CPUX86State *env = &cpu->env; 3216 3217 kvm_msr_buf_reset(cpu); 3218 if (has_msr_arch_capabs) { 3219 kvm_msr_entry_add(cpu, MSR_IA32_ARCH_CAPABILITIES, 3220 env->features[FEAT_ARCH_CAPABILITIES]); 3221 } 3222 3223 if (has_msr_core_capabs) { 3224 kvm_msr_entry_add(cpu, MSR_IA32_CORE_CAPABILITY, 3225 env->features[FEAT_CORE_CAPABILITY]); 3226 } 3227 3228 if (has_msr_perf_capabs && cpu->enable_pmu) { 3229 kvm_msr_entry_add_perf(cpu, env->features); 3230 } 3231 3232 if (has_msr_ucode_rev) { 3233 kvm_msr_entry_add(cpu, MSR_IA32_UCODE_REV, cpu->ucode_rev); 3234 } 3235 3236 /* 3237 * Older kernels do not include VMX MSRs in KVM_GET_MSR_INDEX_LIST, but 3238 * all kernels with MSR features should have them. 3239 */ 3240 if (kvm_feature_msrs && cpu_has_vmx(env)) { 3241 kvm_msr_entry_add_vmx(cpu, env->features); 3242 } 3243 3244 assert(kvm_buf_set_msrs(cpu) == 0); 3245 } 3246 3247 static int kvm_put_msrs(X86CPU *cpu, int level) 3248 { 3249 CPUX86State *env = &cpu->env; 3250 int i; 3251 3252 kvm_msr_buf_reset(cpu); 3253 3254 kvm_msr_entry_add(cpu, MSR_IA32_SYSENTER_CS, env->sysenter_cs); 3255 kvm_msr_entry_add(cpu, MSR_IA32_SYSENTER_ESP, env->sysenter_esp); 3256 kvm_msr_entry_add(cpu, MSR_IA32_SYSENTER_EIP, env->sysenter_eip); 3257 kvm_msr_entry_add(cpu, MSR_PAT, env->pat); 3258 if (has_msr_star) { 3259 kvm_msr_entry_add(cpu, MSR_STAR, env->star); 3260 } 3261 if (has_msr_hsave_pa) { 3262 kvm_msr_entry_add(cpu, MSR_VM_HSAVE_PA, env->vm_hsave); 3263 } 3264 if (has_msr_tsc_aux) { 3265 kvm_msr_entry_add(cpu, MSR_TSC_AUX, env->tsc_aux); 3266 } 3267 if (has_msr_tsc_adjust) { 3268 kvm_msr_entry_add(cpu, MSR_TSC_ADJUST, env->tsc_adjust); 3269 } 3270 if (has_msr_misc_enable) { 3271 kvm_msr_entry_add(cpu, MSR_IA32_MISC_ENABLE, 3272 env->msr_ia32_misc_enable); 3273 } 3274 if (has_msr_smbase) { 3275 kvm_msr_entry_add(cpu, MSR_IA32_SMBASE, env->smbase); 3276 } 3277 if (has_msr_smi_count) { 3278 kvm_msr_entry_add(cpu, MSR_SMI_COUNT, env->msr_smi_count); 3279 } 3280 if (has_msr_pkrs) { 3281 kvm_msr_entry_add(cpu, MSR_IA32_PKRS, env->pkrs); 3282 } 3283 if (has_msr_bndcfgs) { 3284 kvm_msr_entry_add(cpu, MSR_IA32_BNDCFGS, env->msr_bndcfgs); 3285 } 3286 if (has_msr_xss) { 3287 kvm_msr_entry_add(cpu, MSR_IA32_XSS, env->xss); 3288 } 3289 if (has_msr_umwait) { 3290 kvm_msr_entry_add(cpu, MSR_IA32_UMWAIT_CONTROL, env->umwait); 3291 } 3292 if (has_msr_spec_ctrl) { 3293 kvm_msr_entry_add(cpu, MSR_IA32_SPEC_CTRL, env->spec_ctrl); 3294 } 3295 if (has_tsc_scale_msr) { 3296 kvm_msr_entry_add(cpu, MSR_AMD64_TSC_RATIO, env->amd_tsc_scale_msr); 3297 } 3298 3299 if (has_msr_tsx_ctrl) { 3300 kvm_msr_entry_add(cpu, MSR_IA32_TSX_CTRL, env->tsx_ctrl); 3301 } 3302 if (has_msr_virt_ssbd) { 3303 kvm_msr_entry_add(cpu, MSR_VIRT_SSBD, env->virt_ssbd); 3304 } 3305 3306 #ifdef TARGET_X86_64 3307 if (lm_capable_kernel) { 3308 kvm_msr_entry_add(cpu, MSR_CSTAR, env->cstar); 3309 kvm_msr_entry_add(cpu, MSR_KERNELGSBASE, env->kernelgsbase); 3310 kvm_msr_entry_add(cpu, MSR_FMASK, env->fmask); 3311 kvm_msr_entry_add(cpu, MSR_LSTAR, env->lstar); 3312 } 3313 #endif 3314 3315 /* 3316 * The following MSRs have side effects on the guest or are too heavy 3317 * for normal writeback. Limit them to reset or full state updates. 3318 */ 3319 if (level >= KVM_PUT_RESET_STATE) { 3320 kvm_msr_entry_add(cpu, MSR_IA32_TSC, env->tsc); 3321 kvm_msr_entry_add(cpu, MSR_KVM_SYSTEM_TIME, env->system_time_msr); 3322 kvm_msr_entry_add(cpu, MSR_KVM_WALL_CLOCK, env->wall_clock_msr); 3323 if (env->features[FEAT_KVM] & (1 << KVM_FEATURE_ASYNC_PF_INT)) { 3324 kvm_msr_entry_add(cpu, MSR_KVM_ASYNC_PF_INT, env->async_pf_int_msr); 3325 } 3326 if (env->features[FEAT_KVM] & (1 << KVM_FEATURE_ASYNC_PF)) { 3327 kvm_msr_entry_add(cpu, MSR_KVM_ASYNC_PF_EN, env->async_pf_en_msr); 3328 } 3329 if (env->features[FEAT_KVM] & (1 << KVM_FEATURE_PV_EOI)) { 3330 kvm_msr_entry_add(cpu, MSR_KVM_PV_EOI_EN, env->pv_eoi_en_msr); 3331 } 3332 if (env->features[FEAT_KVM] & (1 << KVM_FEATURE_STEAL_TIME)) { 3333 kvm_msr_entry_add(cpu, MSR_KVM_STEAL_TIME, env->steal_time_msr); 3334 } 3335 3336 if (env->features[FEAT_KVM] & (1 << KVM_FEATURE_POLL_CONTROL)) { 3337 kvm_msr_entry_add(cpu, MSR_KVM_POLL_CONTROL, env->poll_control_msr); 3338 } 3339 3340 if (has_architectural_pmu_version > 0) { 3341 if (has_architectural_pmu_version > 1) { 3342 /* Stop the counter. */ 3343 kvm_msr_entry_add(cpu, MSR_CORE_PERF_FIXED_CTR_CTRL, 0); 3344 kvm_msr_entry_add(cpu, MSR_CORE_PERF_GLOBAL_CTRL, 0); 3345 } 3346 3347 /* Set the counter values. */ 3348 for (i = 0; i < num_architectural_pmu_fixed_counters; i++) { 3349 kvm_msr_entry_add(cpu, MSR_CORE_PERF_FIXED_CTR0 + i, 3350 env->msr_fixed_counters[i]); 3351 } 3352 for (i = 0; i < num_architectural_pmu_gp_counters; i++) { 3353 kvm_msr_entry_add(cpu, MSR_P6_PERFCTR0 + i, 3354 env->msr_gp_counters[i]); 3355 kvm_msr_entry_add(cpu, MSR_P6_EVNTSEL0 + i, 3356 env->msr_gp_evtsel[i]); 3357 } 3358 if (has_architectural_pmu_version > 1) { 3359 kvm_msr_entry_add(cpu, MSR_CORE_PERF_GLOBAL_STATUS, 3360 env->msr_global_status); 3361 kvm_msr_entry_add(cpu, MSR_CORE_PERF_GLOBAL_OVF_CTRL, 3362 env->msr_global_ovf_ctrl); 3363 3364 /* Now start the PMU. */ 3365 kvm_msr_entry_add(cpu, MSR_CORE_PERF_FIXED_CTR_CTRL, 3366 env->msr_fixed_ctr_ctrl); 3367 kvm_msr_entry_add(cpu, MSR_CORE_PERF_GLOBAL_CTRL, 3368 env->msr_global_ctrl); 3369 } 3370 } 3371 /* 3372 * Hyper-V partition-wide MSRs: to avoid clearing them on cpu hot-add, 3373 * only sync them to KVM on the first cpu 3374 */ 3375 if (current_cpu == first_cpu) { 3376 if (has_msr_hv_hypercall) { 3377 kvm_msr_entry_add(cpu, HV_X64_MSR_GUEST_OS_ID, 3378 env->msr_hv_guest_os_id); 3379 kvm_msr_entry_add(cpu, HV_X64_MSR_HYPERCALL, 3380 env->msr_hv_hypercall); 3381 } 3382 if (hyperv_feat_enabled(cpu, HYPERV_FEAT_TIME)) { 3383 kvm_msr_entry_add(cpu, HV_X64_MSR_REFERENCE_TSC, 3384 env->msr_hv_tsc); 3385 } 3386 if (hyperv_feat_enabled(cpu, HYPERV_FEAT_REENLIGHTENMENT)) { 3387 kvm_msr_entry_add(cpu, HV_X64_MSR_REENLIGHTENMENT_CONTROL, 3388 env->msr_hv_reenlightenment_control); 3389 kvm_msr_entry_add(cpu, HV_X64_MSR_TSC_EMULATION_CONTROL, 3390 env->msr_hv_tsc_emulation_control); 3391 kvm_msr_entry_add(cpu, HV_X64_MSR_TSC_EMULATION_STATUS, 3392 env->msr_hv_tsc_emulation_status); 3393 } 3394 #ifdef CONFIG_SYNDBG 3395 if (hyperv_feat_enabled(cpu, HYPERV_FEAT_SYNDBG) && 3396 has_msr_hv_syndbg_options) { 3397 kvm_msr_entry_add(cpu, HV_X64_MSR_SYNDBG_OPTIONS, 3398 hyperv_syndbg_query_options()); 3399 } 3400 #endif 3401 } 3402 if (hyperv_feat_enabled(cpu, HYPERV_FEAT_VAPIC)) { 3403 kvm_msr_entry_add(cpu, HV_X64_MSR_APIC_ASSIST_PAGE, 3404 env->msr_hv_vapic); 3405 } 3406 if (has_msr_hv_crash) { 3407 int j; 3408 3409 for (j = 0; j < HV_CRASH_PARAMS; j++) 3410 kvm_msr_entry_add(cpu, HV_X64_MSR_CRASH_P0 + j, 3411 env->msr_hv_crash_params[j]); 3412 3413 kvm_msr_entry_add(cpu, HV_X64_MSR_CRASH_CTL, HV_CRASH_CTL_NOTIFY); 3414 } 3415 if (has_msr_hv_runtime) { 3416 kvm_msr_entry_add(cpu, HV_X64_MSR_VP_RUNTIME, env->msr_hv_runtime); 3417 } 3418 if (hyperv_feat_enabled(cpu, HYPERV_FEAT_VPINDEX) 3419 && hv_vpindex_settable) { 3420 kvm_msr_entry_add(cpu, HV_X64_MSR_VP_INDEX, 3421 hyperv_vp_index(CPU(cpu))); 3422 } 3423 if (hyperv_feat_enabled(cpu, HYPERV_FEAT_SYNIC)) { 3424 int j; 3425 3426 kvm_msr_entry_add(cpu, HV_X64_MSR_SVERSION, HV_SYNIC_VERSION); 3427 3428 kvm_msr_entry_add(cpu, HV_X64_MSR_SCONTROL, 3429 env->msr_hv_synic_control); 3430 kvm_msr_entry_add(cpu, HV_X64_MSR_SIEFP, 3431 env->msr_hv_synic_evt_page); 3432 kvm_msr_entry_add(cpu, HV_X64_MSR_SIMP, 3433 env->msr_hv_synic_msg_page); 3434 3435 for (j = 0; j < ARRAY_SIZE(env->msr_hv_synic_sint); j++) { 3436 kvm_msr_entry_add(cpu, HV_X64_MSR_SINT0 + j, 3437 env->msr_hv_synic_sint[j]); 3438 } 3439 } 3440 if (has_msr_hv_stimer) { 3441 int j; 3442 3443 for (j = 0; j < ARRAY_SIZE(env->msr_hv_stimer_config); j++) { 3444 kvm_msr_entry_add(cpu, HV_X64_MSR_STIMER0_CONFIG + j * 2, 3445 env->msr_hv_stimer_config[j]); 3446 } 3447 3448 for (j = 0; j < ARRAY_SIZE(env->msr_hv_stimer_count); j++) { 3449 kvm_msr_entry_add(cpu, HV_X64_MSR_STIMER0_COUNT + j * 2, 3450 env->msr_hv_stimer_count[j]); 3451 } 3452 } 3453 if (env->features[FEAT_1_EDX] & CPUID_MTRR) { 3454 uint64_t phys_mask = MAKE_64BIT_MASK(0, cpu->phys_bits); 3455 3456 kvm_msr_entry_add(cpu, MSR_MTRRdefType, env->mtrr_deftype); 3457 kvm_msr_entry_add(cpu, MSR_MTRRfix64K_00000, env->mtrr_fixed[0]); 3458 kvm_msr_entry_add(cpu, MSR_MTRRfix16K_80000, env->mtrr_fixed[1]); 3459 kvm_msr_entry_add(cpu, MSR_MTRRfix16K_A0000, env->mtrr_fixed[2]); 3460 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_C0000, env->mtrr_fixed[3]); 3461 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_C8000, env->mtrr_fixed[4]); 3462 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_D0000, env->mtrr_fixed[5]); 3463 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_D8000, env->mtrr_fixed[6]); 3464 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_E0000, env->mtrr_fixed[7]); 3465 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_E8000, env->mtrr_fixed[8]); 3466 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_F0000, env->mtrr_fixed[9]); 3467 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_F8000, env->mtrr_fixed[10]); 3468 for (i = 0; i < MSR_MTRRcap_VCNT; i++) { 3469 /* The CPU GPs if we write to a bit above the physical limit of 3470 * the host CPU (and KVM emulates that) 3471 */ 3472 uint64_t mask = env->mtrr_var[i].mask; 3473 mask &= phys_mask; 3474 3475 kvm_msr_entry_add(cpu, MSR_MTRRphysBase(i), 3476 env->mtrr_var[i].base); 3477 kvm_msr_entry_add(cpu, MSR_MTRRphysMask(i), mask); 3478 } 3479 } 3480 if (env->features[FEAT_7_0_EBX] & CPUID_7_0_EBX_INTEL_PT) { 3481 int addr_num = kvm_arch_get_supported_cpuid(kvm_state, 3482 0x14, 1, R_EAX) & 0x7; 3483 3484 kvm_msr_entry_add(cpu, MSR_IA32_RTIT_CTL, 3485 env->msr_rtit_ctrl); 3486 kvm_msr_entry_add(cpu, MSR_IA32_RTIT_STATUS, 3487 env->msr_rtit_status); 3488 kvm_msr_entry_add(cpu, MSR_IA32_RTIT_OUTPUT_BASE, 3489 env->msr_rtit_output_base); 3490 kvm_msr_entry_add(cpu, MSR_IA32_RTIT_OUTPUT_MASK, 3491 env->msr_rtit_output_mask); 3492 kvm_msr_entry_add(cpu, MSR_IA32_RTIT_CR3_MATCH, 3493 env->msr_rtit_cr3_match); 3494 for (i = 0; i < addr_num; i++) { 3495 kvm_msr_entry_add(cpu, MSR_IA32_RTIT_ADDR0_A + i, 3496 env->msr_rtit_addrs[i]); 3497 } 3498 } 3499 3500 if (env->features[FEAT_7_0_ECX] & CPUID_7_0_ECX_SGX_LC) { 3501 kvm_msr_entry_add(cpu, MSR_IA32_SGXLEPUBKEYHASH0, 3502 env->msr_ia32_sgxlepubkeyhash[0]); 3503 kvm_msr_entry_add(cpu, MSR_IA32_SGXLEPUBKEYHASH1, 3504 env->msr_ia32_sgxlepubkeyhash[1]); 3505 kvm_msr_entry_add(cpu, MSR_IA32_SGXLEPUBKEYHASH2, 3506 env->msr_ia32_sgxlepubkeyhash[2]); 3507 kvm_msr_entry_add(cpu, MSR_IA32_SGXLEPUBKEYHASH3, 3508 env->msr_ia32_sgxlepubkeyhash[3]); 3509 } 3510 3511 if (env->features[FEAT_XSAVE] & CPUID_D_1_EAX_XFD) { 3512 kvm_msr_entry_add(cpu, MSR_IA32_XFD, 3513 env->msr_xfd); 3514 kvm_msr_entry_add(cpu, MSR_IA32_XFD_ERR, 3515 env->msr_xfd_err); 3516 } 3517 3518 if (kvm_enabled() && cpu->enable_pmu && 3519 (env->features[FEAT_7_0_EDX] & CPUID_7_0_EDX_ARCH_LBR)) { 3520 uint64_t depth; 3521 int ret; 3522 3523 /* 3524 * Only migrate Arch LBR states when the host Arch LBR depth 3525 * equals that of source guest's, this is to avoid mismatch 3526 * of guest/host config for the msr hence avoid unexpected 3527 * misbehavior. 3528 */ 3529 ret = kvm_get_one_msr(cpu, MSR_ARCH_LBR_DEPTH, &depth); 3530 3531 if (ret == 1 && !!depth && depth == env->msr_lbr_depth) { 3532 kvm_msr_entry_add(cpu, MSR_ARCH_LBR_CTL, env->msr_lbr_ctl); 3533 kvm_msr_entry_add(cpu, MSR_ARCH_LBR_DEPTH, env->msr_lbr_depth); 3534 3535 for (i = 0; i < ARCH_LBR_NR_ENTRIES; i++) { 3536 if (!env->lbr_records[i].from) { 3537 continue; 3538 } 3539 kvm_msr_entry_add(cpu, MSR_ARCH_LBR_FROM_0 + i, 3540 env->lbr_records[i].from); 3541 kvm_msr_entry_add(cpu, MSR_ARCH_LBR_TO_0 + i, 3542 env->lbr_records[i].to); 3543 kvm_msr_entry_add(cpu, MSR_ARCH_LBR_INFO_0 + i, 3544 env->lbr_records[i].info); 3545 } 3546 } 3547 } 3548 3549 /* Note: MSR_IA32_FEATURE_CONTROL is written separately, see 3550 * kvm_put_msr_feature_control. */ 3551 } 3552 3553 if (env->mcg_cap) { 3554 kvm_msr_entry_add(cpu, MSR_MCG_STATUS, env->mcg_status); 3555 kvm_msr_entry_add(cpu, MSR_MCG_CTL, env->mcg_ctl); 3556 if (has_msr_mcg_ext_ctl) { 3557 kvm_msr_entry_add(cpu, MSR_MCG_EXT_CTL, env->mcg_ext_ctl); 3558 } 3559 for (i = 0; i < (env->mcg_cap & 0xff) * 4; i++) { 3560 kvm_msr_entry_add(cpu, MSR_MC0_CTL + i, env->mce_banks[i]); 3561 } 3562 } 3563 3564 return kvm_buf_set_msrs(cpu); 3565 } 3566 3567 3568 static int kvm_get_xsave(X86CPU *cpu) 3569 { 3570 CPUX86State *env = &cpu->env; 3571 void *xsave = env->xsave_buf; 3572 int type, ret; 3573 3574 type = has_xsave2 ? KVM_GET_XSAVE2 : KVM_GET_XSAVE; 3575 ret = kvm_vcpu_ioctl(CPU(cpu), type, xsave); 3576 if (ret < 0) { 3577 return ret; 3578 } 3579 x86_cpu_xrstor_all_areas(cpu, xsave, env->xsave_buf_len); 3580 3581 return 0; 3582 } 3583 3584 static int kvm_get_xcrs(X86CPU *cpu) 3585 { 3586 CPUX86State *env = &cpu->env; 3587 int i, ret; 3588 struct kvm_xcrs xcrs; 3589 3590 if (!has_xcrs) { 3591 return 0; 3592 } 3593 3594 ret = kvm_vcpu_ioctl(CPU(cpu), KVM_GET_XCRS, &xcrs); 3595 if (ret < 0) { 3596 return ret; 3597 } 3598 3599 for (i = 0; i < xcrs.nr_xcrs; i++) { 3600 /* Only support xcr0 now */ 3601 if (xcrs.xcrs[i].xcr == 0) { 3602 env->xcr0 = xcrs.xcrs[i].value; 3603 break; 3604 } 3605 } 3606 return 0; 3607 } 3608 3609 static int kvm_get_sregs(X86CPU *cpu) 3610 { 3611 CPUX86State *env = &cpu->env; 3612 struct kvm_sregs sregs; 3613 int ret; 3614 3615 ret = kvm_vcpu_ioctl(CPU(cpu), KVM_GET_SREGS, &sregs); 3616 if (ret < 0) { 3617 return ret; 3618 } 3619 3620 /* 3621 * The interrupt_bitmap is ignored because KVM_GET_SREGS is 3622 * always preceded by KVM_GET_VCPU_EVENTS. 3623 */ 3624 3625 get_seg(&env->segs[R_CS], &sregs.cs); 3626 get_seg(&env->segs[R_DS], &sregs.ds); 3627 get_seg(&env->segs[R_ES], &sregs.es); 3628 get_seg(&env->segs[R_FS], &sregs.fs); 3629 get_seg(&env->segs[R_GS], &sregs.gs); 3630 get_seg(&env->segs[R_SS], &sregs.ss); 3631 3632 get_seg(&env->tr, &sregs.tr); 3633 get_seg(&env->ldt, &sregs.ldt); 3634 3635 env->idt.limit = sregs.idt.limit; 3636 env->idt.base = sregs.idt.base; 3637 env->gdt.limit = sregs.gdt.limit; 3638 env->gdt.base = sregs.gdt.base; 3639 3640 env->cr[0] = sregs.cr0; 3641 env->cr[2] = sregs.cr2; 3642 env->cr[3] = sregs.cr3; 3643 env->cr[4] = sregs.cr4; 3644 3645 env->efer = sregs.efer; 3646 if (sev_es_enabled() && env->efer & MSR_EFER_LME && 3647 env->cr[0] & CR0_PG_MASK) { 3648 env->efer |= MSR_EFER_LMA; 3649 } 3650 3651 /* changes to apic base and cr8/tpr are read back via kvm_arch_post_run */ 3652 x86_update_hflags(env); 3653 3654 return 0; 3655 } 3656 3657 static int kvm_get_sregs2(X86CPU *cpu) 3658 { 3659 CPUX86State *env = &cpu->env; 3660 struct kvm_sregs2 sregs; 3661 int i, ret; 3662 3663 ret = kvm_vcpu_ioctl(CPU(cpu), KVM_GET_SREGS2, &sregs); 3664 if (ret < 0) { 3665 return ret; 3666 } 3667 3668 get_seg(&env->segs[R_CS], &sregs.cs); 3669 get_seg(&env->segs[R_DS], &sregs.ds); 3670 get_seg(&env->segs[R_ES], &sregs.es); 3671 get_seg(&env->segs[R_FS], &sregs.fs); 3672 get_seg(&env->segs[R_GS], &sregs.gs); 3673 get_seg(&env->segs[R_SS], &sregs.ss); 3674 3675 get_seg(&env->tr, &sregs.tr); 3676 get_seg(&env->ldt, &sregs.ldt); 3677 3678 env->idt.limit = sregs.idt.limit; 3679 env->idt.base = sregs.idt.base; 3680 env->gdt.limit = sregs.gdt.limit; 3681 env->gdt.base = sregs.gdt.base; 3682 3683 env->cr[0] = sregs.cr0; 3684 env->cr[2] = sregs.cr2; 3685 env->cr[3] = sregs.cr3; 3686 env->cr[4] = sregs.cr4; 3687 3688 env->efer = sregs.efer; 3689 if (sev_es_enabled() && env->efer & MSR_EFER_LME && 3690 env->cr[0] & CR0_PG_MASK) { 3691 env->efer |= MSR_EFER_LMA; 3692 } 3693 3694 env->pdptrs_valid = sregs.flags & KVM_SREGS2_FLAGS_PDPTRS_VALID; 3695 3696 if (env->pdptrs_valid) { 3697 for (i = 0; i < 4; i++) { 3698 env->pdptrs[i] = sregs.pdptrs[i]; 3699 } 3700 } 3701 3702 /* changes to apic base and cr8/tpr are read back via kvm_arch_post_run */ 3703 x86_update_hflags(env); 3704 3705 return 0; 3706 } 3707 3708 static int kvm_get_msrs(X86CPU *cpu) 3709 { 3710 CPUX86State *env = &cpu->env; 3711 struct kvm_msr_entry *msrs = cpu->kvm_msr_buf->entries; 3712 int ret, i; 3713 uint64_t mtrr_top_bits; 3714 3715 kvm_msr_buf_reset(cpu); 3716 3717 kvm_msr_entry_add(cpu, MSR_IA32_SYSENTER_CS, 0); 3718 kvm_msr_entry_add(cpu, MSR_IA32_SYSENTER_ESP, 0); 3719 kvm_msr_entry_add(cpu, MSR_IA32_SYSENTER_EIP, 0); 3720 kvm_msr_entry_add(cpu, MSR_PAT, 0); 3721 if (has_msr_star) { 3722 kvm_msr_entry_add(cpu, MSR_STAR, 0); 3723 } 3724 if (has_msr_hsave_pa) { 3725 kvm_msr_entry_add(cpu, MSR_VM_HSAVE_PA, 0); 3726 } 3727 if (has_msr_tsc_aux) { 3728 kvm_msr_entry_add(cpu, MSR_TSC_AUX, 0); 3729 } 3730 if (has_msr_tsc_adjust) { 3731 kvm_msr_entry_add(cpu, MSR_TSC_ADJUST, 0); 3732 } 3733 if (has_msr_tsc_deadline) { 3734 kvm_msr_entry_add(cpu, MSR_IA32_TSCDEADLINE, 0); 3735 } 3736 if (has_msr_misc_enable) { 3737 kvm_msr_entry_add(cpu, MSR_IA32_MISC_ENABLE, 0); 3738 } 3739 if (has_msr_smbase) { 3740 kvm_msr_entry_add(cpu, MSR_IA32_SMBASE, 0); 3741 } 3742 if (has_msr_smi_count) { 3743 kvm_msr_entry_add(cpu, MSR_SMI_COUNT, 0); 3744 } 3745 if (has_msr_feature_control) { 3746 kvm_msr_entry_add(cpu, MSR_IA32_FEATURE_CONTROL, 0); 3747 } 3748 if (has_msr_pkrs) { 3749 kvm_msr_entry_add(cpu, MSR_IA32_PKRS, 0); 3750 } 3751 if (has_msr_bndcfgs) { 3752 kvm_msr_entry_add(cpu, MSR_IA32_BNDCFGS, 0); 3753 } 3754 if (has_msr_xss) { 3755 kvm_msr_entry_add(cpu, MSR_IA32_XSS, 0); 3756 } 3757 if (has_msr_umwait) { 3758 kvm_msr_entry_add(cpu, MSR_IA32_UMWAIT_CONTROL, 0); 3759 } 3760 if (has_msr_spec_ctrl) { 3761 kvm_msr_entry_add(cpu, MSR_IA32_SPEC_CTRL, 0); 3762 } 3763 if (has_tsc_scale_msr) { 3764 kvm_msr_entry_add(cpu, MSR_AMD64_TSC_RATIO, 0); 3765 } 3766 3767 if (has_msr_tsx_ctrl) { 3768 kvm_msr_entry_add(cpu, MSR_IA32_TSX_CTRL, 0); 3769 } 3770 if (has_msr_virt_ssbd) { 3771 kvm_msr_entry_add(cpu, MSR_VIRT_SSBD, 0); 3772 } 3773 if (!env->tsc_valid) { 3774 kvm_msr_entry_add(cpu, MSR_IA32_TSC, 0); 3775 env->tsc_valid = !runstate_is_running(); 3776 } 3777 3778 #ifdef TARGET_X86_64 3779 if (lm_capable_kernel) { 3780 kvm_msr_entry_add(cpu, MSR_CSTAR, 0); 3781 kvm_msr_entry_add(cpu, MSR_KERNELGSBASE, 0); 3782 kvm_msr_entry_add(cpu, MSR_FMASK, 0); 3783 kvm_msr_entry_add(cpu, MSR_LSTAR, 0); 3784 } 3785 #endif 3786 kvm_msr_entry_add(cpu, MSR_KVM_SYSTEM_TIME, 0); 3787 kvm_msr_entry_add(cpu, MSR_KVM_WALL_CLOCK, 0); 3788 if (env->features[FEAT_KVM] & (1 << KVM_FEATURE_ASYNC_PF_INT)) { 3789 kvm_msr_entry_add(cpu, MSR_KVM_ASYNC_PF_INT, 0); 3790 } 3791 if (env->features[FEAT_KVM] & (1 << KVM_FEATURE_ASYNC_PF)) { 3792 kvm_msr_entry_add(cpu, MSR_KVM_ASYNC_PF_EN, 0); 3793 } 3794 if (env->features[FEAT_KVM] & (1 << KVM_FEATURE_PV_EOI)) { 3795 kvm_msr_entry_add(cpu, MSR_KVM_PV_EOI_EN, 0); 3796 } 3797 if (env->features[FEAT_KVM] & (1 << KVM_FEATURE_STEAL_TIME)) { 3798 kvm_msr_entry_add(cpu, MSR_KVM_STEAL_TIME, 0); 3799 } 3800 if (env->features[FEAT_KVM] & (1 << KVM_FEATURE_POLL_CONTROL)) { 3801 kvm_msr_entry_add(cpu, MSR_KVM_POLL_CONTROL, 1); 3802 } 3803 if (has_architectural_pmu_version > 0) { 3804 if (has_architectural_pmu_version > 1) { 3805 kvm_msr_entry_add(cpu, MSR_CORE_PERF_FIXED_CTR_CTRL, 0); 3806 kvm_msr_entry_add(cpu, MSR_CORE_PERF_GLOBAL_CTRL, 0); 3807 kvm_msr_entry_add(cpu, MSR_CORE_PERF_GLOBAL_STATUS, 0); 3808 kvm_msr_entry_add(cpu, MSR_CORE_PERF_GLOBAL_OVF_CTRL, 0); 3809 } 3810 for (i = 0; i < num_architectural_pmu_fixed_counters; i++) { 3811 kvm_msr_entry_add(cpu, MSR_CORE_PERF_FIXED_CTR0 + i, 0); 3812 } 3813 for (i = 0; i < num_architectural_pmu_gp_counters; i++) { 3814 kvm_msr_entry_add(cpu, MSR_P6_PERFCTR0 + i, 0); 3815 kvm_msr_entry_add(cpu, MSR_P6_EVNTSEL0 + i, 0); 3816 } 3817 } 3818 3819 if (env->mcg_cap) { 3820 kvm_msr_entry_add(cpu, MSR_MCG_STATUS, 0); 3821 kvm_msr_entry_add(cpu, MSR_MCG_CTL, 0); 3822 if (has_msr_mcg_ext_ctl) { 3823 kvm_msr_entry_add(cpu, MSR_MCG_EXT_CTL, 0); 3824 } 3825 for (i = 0; i < (env->mcg_cap & 0xff) * 4; i++) { 3826 kvm_msr_entry_add(cpu, MSR_MC0_CTL + i, 0); 3827 } 3828 } 3829 3830 if (has_msr_hv_hypercall) { 3831 kvm_msr_entry_add(cpu, HV_X64_MSR_HYPERCALL, 0); 3832 kvm_msr_entry_add(cpu, HV_X64_MSR_GUEST_OS_ID, 0); 3833 } 3834 if (hyperv_feat_enabled(cpu, HYPERV_FEAT_VAPIC)) { 3835 kvm_msr_entry_add(cpu, HV_X64_MSR_APIC_ASSIST_PAGE, 0); 3836 } 3837 if (hyperv_feat_enabled(cpu, HYPERV_FEAT_TIME)) { 3838 kvm_msr_entry_add(cpu, HV_X64_MSR_REFERENCE_TSC, 0); 3839 } 3840 if (hyperv_feat_enabled(cpu, HYPERV_FEAT_REENLIGHTENMENT)) { 3841 kvm_msr_entry_add(cpu, HV_X64_MSR_REENLIGHTENMENT_CONTROL, 0); 3842 kvm_msr_entry_add(cpu, HV_X64_MSR_TSC_EMULATION_CONTROL, 0); 3843 kvm_msr_entry_add(cpu, HV_X64_MSR_TSC_EMULATION_STATUS, 0); 3844 } 3845 if (has_msr_hv_syndbg_options) { 3846 kvm_msr_entry_add(cpu, HV_X64_MSR_SYNDBG_OPTIONS, 0); 3847 } 3848 if (has_msr_hv_crash) { 3849 int j; 3850 3851 for (j = 0; j < HV_CRASH_PARAMS; j++) { 3852 kvm_msr_entry_add(cpu, HV_X64_MSR_CRASH_P0 + j, 0); 3853 } 3854 } 3855 if (has_msr_hv_runtime) { 3856 kvm_msr_entry_add(cpu, HV_X64_MSR_VP_RUNTIME, 0); 3857 } 3858 if (hyperv_feat_enabled(cpu, HYPERV_FEAT_SYNIC)) { 3859 uint32_t msr; 3860 3861 kvm_msr_entry_add(cpu, HV_X64_MSR_SCONTROL, 0); 3862 kvm_msr_entry_add(cpu, HV_X64_MSR_SIEFP, 0); 3863 kvm_msr_entry_add(cpu, HV_X64_MSR_SIMP, 0); 3864 for (msr = HV_X64_MSR_SINT0; msr <= HV_X64_MSR_SINT15; msr++) { 3865 kvm_msr_entry_add(cpu, msr, 0); 3866 } 3867 } 3868 if (has_msr_hv_stimer) { 3869 uint32_t msr; 3870 3871 for (msr = HV_X64_MSR_STIMER0_CONFIG; msr <= HV_X64_MSR_STIMER3_COUNT; 3872 msr++) { 3873 kvm_msr_entry_add(cpu, msr, 0); 3874 } 3875 } 3876 if (env->features[FEAT_1_EDX] & CPUID_MTRR) { 3877 kvm_msr_entry_add(cpu, MSR_MTRRdefType, 0); 3878 kvm_msr_entry_add(cpu, MSR_MTRRfix64K_00000, 0); 3879 kvm_msr_entry_add(cpu, MSR_MTRRfix16K_80000, 0); 3880 kvm_msr_entry_add(cpu, MSR_MTRRfix16K_A0000, 0); 3881 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_C0000, 0); 3882 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_C8000, 0); 3883 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_D0000, 0); 3884 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_D8000, 0); 3885 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_E0000, 0); 3886 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_E8000, 0); 3887 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_F0000, 0); 3888 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_F8000, 0); 3889 for (i = 0; i < MSR_MTRRcap_VCNT; i++) { 3890 kvm_msr_entry_add(cpu, MSR_MTRRphysBase(i), 0); 3891 kvm_msr_entry_add(cpu, MSR_MTRRphysMask(i), 0); 3892 } 3893 } 3894 3895 if (env->features[FEAT_7_0_EBX] & CPUID_7_0_EBX_INTEL_PT) { 3896 int addr_num = 3897 kvm_arch_get_supported_cpuid(kvm_state, 0x14, 1, R_EAX) & 0x7; 3898 3899 kvm_msr_entry_add(cpu, MSR_IA32_RTIT_CTL, 0); 3900 kvm_msr_entry_add(cpu, MSR_IA32_RTIT_STATUS, 0); 3901 kvm_msr_entry_add(cpu, MSR_IA32_RTIT_OUTPUT_BASE, 0); 3902 kvm_msr_entry_add(cpu, MSR_IA32_RTIT_OUTPUT_MASK, 0); 3903 kvm_msr_entry_add(cpu, MSR_IA32_RTIT_CR3_MATCH, 0); 3904 for (i = 0; i < addr_num; i++) { 3905 kvm_msr_entry_add(cpu, MSR_IA32_RTIT_ADDR0_A + i, 0); 3906 } 3907 } 3908 3909 if (env->features[FEAT_7_0_ECX] & CPUID_7_0_ECX_SGX_LC) { 3910 kvm_msr_entry_add(cpu, MSR_IA32_SGXLEPUBKEYHASH0, 0); 3911 kvm_msr_entry_add(cpu, MSR_IA32_SGXLEPUBKEYHASH1, 0); 3912 kvm_msr_entry_add(cpu, MSR_IA32_SGXLEPUBKEYHASH2, 0); 3913 kvm_msr_entry_add(cpu, MSR_IA32_SGXLEPUBKEYHASH3, 0); 3914 } 3915 3916 if (env->features[FEAT_XSAVE] & CPUID_D_1_EAX_XFD) { 3917 kvm_msr_entry_add(cpu, MSR_IA32_XFD, 0); 3918 kvm_msr_entry_add(cpu, MSR_IA32_XFD_ERR, 0); 3919 } 3920 3921 if (kvm_enabled() && cpu->enable_pmu && 3922 (env->features[FEAT_7_0_EDX] & CPUID_7_0_EDX_ARCH_LBR)) { 3923 uint64_t depth; 3924 3925 ret = kvm_get_one_msr(cpu, MSR_ARCH_LBR_DEPTH, &depth); 3926 if (ret == 1 && depth == ARCH_LBR_NR_ENTRIES) { 3927 kvm_msr_entry_add(cpu, MSR_ARCH_LBR_CTL, 0); 3928 kvm_msr_entry_add(cpu, MSR_ARCH_LBR_DEPTH, 0); 3929 3930 for (i = 0; i < ARCH_LBR_NR_ENTRIES; i++) { 3931 kvm_msr_entry_add(cpu, MSR_ARCH_LBR_FROM_0 + i, 0); 3932 kvm_msr_entry_add(cpu, MSR_ARCH_LBR_TO_0 + i, 0); 3933 kvm_msr_entry_add(cpu, MSR_ARCH_LBR_INFO_0 + i, 0); 3934 } 3935 } 3936 } 3937 3938 ret = kvm_vcpu_ioctl(CPU(cpu), KVM_GET_MSRS, cpu->kvm_msr_buf); 3939 if (ret < 0) { 3940 return ret; 3941 } 3942 3943 if (ret < cpu->kvm_msr_buf->nmsrs) { 3944 struct kvm_msr_entry *e = &cpu->kvm_msr_buf->entries[ret]; 3945 error_report("error: failed to get MSR 0x%" PRIx32, 3946 (uint32_t)e->index); 3947 } 3948 3949 assert(ret == cpu->kvm_msr_buf->nmsrs); 3950 /* 3951 * MTRR masks: Each mask consists of 5 parts 3952 * a 10..0: must be zero 3953 * b 11 : valid bit 3954 * c n-1.12: actual mask bits 3955 * d 51..n: reserved must be zero 3956 * e 63.52: reserved must be zero 3957 * 3958 * 'n' is the number of physical bits supported by the CPU and is 3959 * apparently always <= 52. We know our 'n' but don't know what 3960 * the destinations 'n' is; it might be smaller, in which case 3961 * it masks (c) on loading. It might be larger, in which case 3962 * we fill 'd' so that d..c is consistent irrespetive of the 'n' 3963 * we're migrating to. 3964 */ 3965 3966 if (cpu->fill_mtrr_mask) { 3967 QEMU_BUILD_BUG_ON(TARGET_PHYS_ADDR_SPACE_BITS > 52); 3968 assert(cpu->phys_bits <= TARGET_PHYS_ADDR_SPACE_BITS); 3969 mtrr_top_bits = MAKE_64BIT_MASK(cpu->phys_bits, 52 - cpu->phys_bits); 3970 } else { 3971 mtrr_top_bits = 0; 3972 } 3973 3974 for (i = 0; i < ret; i++) { 3975 uint32_t index = msrs[i].index; 3976 switch (index) { 3977 case MSR_IA32_SYSENTER_CS: 3978 env->sysenter_cs = msrs[i].data; 3979 break; 3980 case MSR_IA32_SYSENTER_ESP: 3981 env->sysenter_esp = msrs[i].data; 3982 break; 3983 case MSR_IA32_SYSENTER_EIP: 3984 env->sysenter_eip = msrs[i].data; 3985 break; 3986 case MSR_PAT: 3987 env->pat = msrs[i].data; 3988 break; 3989 case MSR_STAR: 3990 env->star = msrs[i].data; 3991 break; 3992 #ifdef TARGET_X86_64 3993 case MSR_CSTAR: 3994 env->cstar = msrs[i].data; 3995 break; 3996 case MSR_KERNELGSBASE: 3997 env->kernelgsbase = msrs[i].data; 3998 break; 3999 case MSR_FMASK: 4000 env->fmask = msrs[i].data; 4001 break; 4002 case MSR_LSTAR: 4003 env->lstar = msrs[i].data; 4004 break; 4005 #endif 4006 case MSR_IA32_TSC: 4007 env->tsc = msrs[i].data; 4008 break; 4009 case MSR_TSC_AUX: 4010 env->tsc_aux = msrs[i].data; 4011 break; 4012 case MSR_TSC_ADJUST: 4013 env->tsc_adjust = msrs[i].data; 4014 break; 4015 case MSR_IA32_TSCDEADLINE: 4016 env->tsc_deadline = msrs[i].data; 4017 break; 4018 case MSR_VM_HSAVE_PA: 4019 env->vm_hsave = msrs[i].data; 4020 break; 4021 case MSR_KVM_SYSTEM_TIME: 4022 env->system_time_msr = msrs[i].data; 4023 break; 4024 case MSR_KVM_WALL_CLOCK: 4025 env->wall_clock_msr = msrs[i].data; 4026 break; 4027 case MSR_MCG_STATUS: 4028 env->mcg_status = msrs[i].data; 4029 break; 4030 case MSR_MCG_CTL: 4031 env->mcg_ctl = msrs[i].data; 4032 break; 4033 case MSR_MCG_EXT_CTL: 4034 env->mcg_ext_ctl = msrs[i].data; 4035 break; 4036 case MSR_IA32_MISC_ENABLE: 4037 env->msr_ia32_misc_enable = msrs[i].data; 4038 break; 4039 case MSR_IA32_SMBASE: 4040 env->smbase = msrs[i].data; 4041 break; 4042 case MSR_SMI_COUNT: 4043 env->msr_smi_count = msrs[i].data; 4044 break; 4045 case MSR_IA32_FEATURE_CONTROL: 4046 env->msr_ia32_feature_control = msrs[i].data; 4047 break; 4048 case MSR_IA32_BNDCFGS: 4049 env->msr_bndcfgs = msrs[i].data; 4050 break; 4051 case MSR_IA32_XSS: 4052 env->xss = msrs[i].data; 4053 break; 4054 case MSR_IA32_UMWAIT_CONTROL: 4055 env->umwait = msrs[i].data; 4056 break; 4057 case MSR_IA32_PKRS: 4058 env->pkrs = msrs[i].data; 4059 break; 4060 default: 4061 if (msrs[i].index >= MSR_MC0_CTL && 4062 msrs[i].index < MSR_MC0_CTL + (env->mcg_cap & 0xff) * 4) { 4063 env->mce_banks[msrs[i].index - MSR_MC0_CTL] = msrs[i].data; 4064 } 4065 break; 4066 case MSR_KVM_ASYNC_PF_EN: 4067 env->async_pf_en_msr = msrs[i].data; 4068 break; 4069 case MSR_KVM_ASYNC_PF_INT: 4070 env->async_pf_int_msr = msrs[i].data; 4071 break; 4072 case MSR_KVM_PV_EOI_EN: 4073 env->pv_eoi_en_msr = msrs[i].data; 4074 break; 4075 case MSR_KVM_STEAL_TIME: 4076 env->steal_time_msr = msrs[i].data; 4077 break; 4078 case MSR_KVM_POLL_CONTROL: { 4079 env->poll_control_msr = msrs[i].data; 4080 break; 4081 } 4082 case MSR_CORE_PERF_FIXED_CTR_CTRL: 4083 env->msr_fixed_ctr_ctrl = msrs[i].data; 4084 break; 4085 case MSR_CORE_PERF_GLOBAL_CTRL: 4086 env->msr_global_ctrl = msrs[i].data; 4087 break; 4088 case MSR_CORE_PERF_GLOBAL_STATUS: 4089 env->msr_global_status = msrs[i].data; 4090 break; 4091 case MSR_CORE_PERF_GLOBAL_OVF_CTRL: 4092 env->msr_global_ovf_ctrl = msrs[i].data; 4093 break; 4094 case MSR_CORE_PERF_FIXED_CTR0 ... MSR_CORE_PERF_FIXED_CTR0 + MAX_FIXED_COUNTERS - 1: 4095 env->msr_fixed_counters[index - MSR_CORE_PERF_FIXED_CTR0] = msrs[i].data; 4096 break; 4097 case MSR_P6_PERFCTR0 ... MSR_P6_PERFCTR0 + MAX_GP_COUNTERS - 1: 4098 env->msr_gp_counters[index - MSR_P6_PERFCTR0] = msrs[i].data; 4099 break; 4100 case MSR_P6_EVNTSEL0 ... MSR_P6_EVNTSEL0 + MAX_GP_COUNTERS - 1: 4101 env->msr_gp_evtsel[index - MSR_P6_EVNTSEL0] = msrs[i].data; 4102 break; 4103 case HV_X64_MSR_HYPERCALL: 4104 env->msr_hv_hypercall = msrs[i].data; 4105 break; 4106 case HV_X64_MSR_GUEST_OS_ID: 4107 env->msr_hv_guest_os_id = msrs[i].data; 4108 break; 4109 case HV_X64_MSR_APIC_ASSIST_PAGE: 4110 env->msr_hv_vapic = msrs[i].data; 4111 break; 4112 case HV_X64_MSR_REFERENCE_TSC: 4113 env->msr_hv_tsc = msrs[i].data; 4114 break; 4115 case HV_X64_MSR_CRASH_P0 ... HV_X64_MSR_CRASH_P4: 4116 env->msr_hv_crash_params[index - HV_X64_MSR_CRASH_P0] = msrs[i].data; 4117 break; 4118 case HV_X64_MSR_VP_RUNTIME: 4119 env->msr_hv_runtime = msrs[i].data; 4120 break; 4121 case HV_X64_MSR_SCONTROL: 4122 env->msr_hv_synic_control = msrs[i].data; 4123 break; 4124 case HV_X64_MSR_SIEFP: 4125 env->msr_hv_synic_evt_page = msrs[i].data; 4126 break; 4127 case HV_X64_MSR_SIMP: 4128 env->msr_hv_synic_msg_page = msrs[i].data; 4129 break; 4130 case HV_X64_MSR_SINT0 ... HV_X64_MSR_SINT15: 4131 env->msr_hv_synic_sint[index - HV_X64_MSR_SINT0] = msrs[i].data; 4132 break; 4133 case HV_X64_MSR_STIMER0_CONFIG: 4134 case HV_X64_MSR_STIMER1_CONFIG: 4135 case HV_X64_MSR_STIMER2_CONFIG: 4136 case HV_X64_MSR_STIMER3_CONFIG: 4137 env->msr_hv_stimer_config[(index - HV_X64_MSR_STIMER0_CONFIG)/2] = 4138 msrs[i].data; 4139 break; 4140 case HV_X64_MSR_STIMER0_COUNT: 4141 case HV_X64_MSR_STIMER1_COUNT: 4142 case HV_X64_MSR_STIMER2_COUNT: 4143 case HV_X64_MSR_STIMER3_COUNT: 4144 env->msr_hv_stimer_count[(index - HV_X64_MSR_STIMER0_COUNT)/2] = 4145 msrs[i].data; 4146 break; 4147 case HV_X64_MSR_REENLIGHTENMENT_CONTROL: 4148 env->msr_hv_reenlightenment_control = msrs[i].data; 4149 break; 4150 case HV_X64_MSR_TSC_EMULATION_CONTROL: 4151 env->msr_hv_tsc_emulation_control = msrs[i].data; 4152 break; 4153 case HV_X64_MSR_TSC_EMULATION_STATUS: 4154 env->msr_hv_tsc_emulation_status = msrs[i].data; 4155 break; 4156 case HV_X64_MSR_SYNDBG_OPTIONS: 4157 env->msr_hv_syndbg_options = msrs[i].data; 4158 break; 4159 case MSR_MTRRdefType: 4160 env->mtrr_deftype = msrs[i].data; 4161 break; 4162 case MSR_MTRRfix64K_00000: 4163 env->mtrr_fixed[0] = msrs[i].data; 4164 break; 4165 case MSR_MTRRfix16K_80000: 4166 env->mtrr_fixed[1] = msrs[i].data; 4167 break; 4168 case MSR_MTRRfix16K_A0000: 4169 env->mtrr_fixed[2] = msrs[i].data; 4170 break; 4171 case MSR_MTRRfix4K_C0000: 4172 env->mtrr_fixed[3] = msrs[i].data; 4173 break; 4174 case MSR_MTRRfix4K_C8000: 4175 env->mtrr_fixed[4] = msrs[i].data; 4176 break; 4177 case MSR_MTRRfix4K_D0000: 4178 env->mtrr_fixed[5] = msrs[i].data; 4179 break; 4180 case MSR_MTRRfix4K_D8000: 4181 env->mtrr_fixed[6] = msrs[i].data; 4182 break; 4183 case MSR_MTRRfix4K_E0000: 4184 env->mtrr_fixed[7] = msrs[i].data; 4185 break; 4186 case MSR_MTRRfix4K_E8000: 4187 env->mtrr_fixed[8] = msrs[i].data; 4188 break; 4189 case MSR_MTRRfix4K_F0000: 4190 env->mtrr_fixed[9] = msrs[i].data; 4191 break; 4192 case MSR_MTRRfix4K_F8000: 4193 env->mtrr_fixed[10] = msrs[i].data; 4194 break; 4195 case MSR_MTRRphysBase(0) ... MSR_MTRRphysMask(MSR_MTRRcap_VCNT - 1): 4196 if (index & 1) { 4197 env->mtrr_var[MSR_MTRRphysIndex(index)].mask = msrs[i].data | 4198 mtrr_top_bits; 4199 } else { 4200 env->mtrr_var[MSR_MTRRphysIndex(index)].base = msrs[i].data; 4201 } 4202 break; 4203 case MSR_IA32_SPEC_CTRL: 4204 env->spec_ctrl = msrs[i].data; 4205 break; 4206 case MSR_AMD64_TSC_RATIO: 4207 env->amd_tsc_scale_msr = msrs[i].data; 4208 break; 4209 case MSR_IA32_TSX_CTRL: 4210 env->tsx_ctrl = msrs[i].data; 4211 break; 4212 case MSR_VIRT_SSBD: 4213 env->virt_ssbd = msrs[i].data; 4214 break; 4215 case MSR_IA32_RTIT_CTL: 4216 env->msr_rtit_ctrl = msrs[i].data; 4217 break; 4218 case MSR_IA32_RTIT_STATUS: 4219 env->msr_rtit_status = msrs[i].data; 4220 break; 4221 case MSR_IA32_RTIT_OUTPUT_BASE: 4222 env->msr_rtit_output_base = msrs[i].data; 4223 break; 4224 case MSR_IA32_RTIT_OUTPUT_MASK: 4225 env->msr_rtit_output_mask = msrs[i].data; 4226 break; 4227 case MSR_IA32_RTIT_CR3_MATCH: 4228 env->msr_rtit_cr3_match = msrs[i].data; 4229 break; 4230 case MSR_IA32_RTIT_ADDR0_A ... MSR_IA32_RTIT_ADDR3_B: 4231 env->msr_rtit_addrs[index - MSR_IA32_RTIT_ADDR0_A] = msrs[i].data; 4232 break; 4233 case MSR_IA32_SGXLEPUBKEYHASH0 ... MSR_IA32_SGXLEPUBKEYHASH3: 4234 env->msr_ia32_sgxlepubkeyhash[index - MSR_IA32_SGXLEPUBKEYHASH0] = 4235 msrs[i].data; 4236 break; 4237 case MSR_IA32_XFD: 4238 env->msr_xfd = msrs[i].data; 4239 break; 4240 case MSR_IA32_XFD_ERR: 4241 env->msr_xfd_err = msrs[i].data; 4242 break; 4243 case MSR_ARCH_LBR_CTL: 4244 env->msr_lbr_ctl = msrs[i].data; 4245 break; 4246 case MSR_ARCH_LBR_DEPTH: 4247 env->msr_lbr_depth = msrs[i].data; 4248 break; 4249 case MSR_ARCH_LBR_FROM_0 ... MSR_ARCH_LBR_FROM_0 + 31: 4250 env->lbr_records[index - MSR_ARCH_LBR_FROM_0].from = msrs[i].data; 4251 break; 4252 case MSR_ARCH_LBR_TO_0 ... MSR_ARCH_LBR_TO_0 + 31: 4253 env->lbr_records[index - MSR_ARCH_LBR_TO_0].to = msrs[i].data; 4254 break; 4255 case MSR_ARCH_LBR_INFO_0 ... MSR_ARCH_LBR_INFO_0 + 31: 4256 env->lbr_records[index - MSR_ARCH_LBR_INFO_0].info = msrs[i].data; 4257 break; 4258 } 4259 } 4260 4261 return 0; 4262 } 4263 4264 static int kvm_put_mp_state(X86CPU *cpu) 4265 { 4266 struct kvm_mp_state mp_state = { .mp_state = cpu->env.mp_state }; 4267 4268 return kvm_vcpu_ioctl(CPU(cpu), KVM_SET_MP_STATE, &mp_state); 4269 } 4270 4271 static int kvm_get_mp_state(X86CPU *cpu) 4272 { 4273 CPUState *cs = CPU(cpu); 4274 CPUX86State *env = &cpu->env; 4275 struct kvm_mp_state mp_state; 4276 int ret; 4277 4278 ret = kvm_vcpu_ioctl(cs, KVM_GET_MP_STATE, &mp_state); 4279 if (ret < 0) { 4280 return ret; 4281 } 4282 env->mp_state = mp_state.mp_state; 4283 if (kvm_irqchip_in_kernel()) { 4284 cs->halted = (mp_state.mp_state == KVM_MP_STATE_HALTED); 4285 } 4286 return 0; 4287 } 4288 4289 static int kvm_get_apic(X86CPU *cpu) 4290 { 4291 DeviceState *apic = cpu->apic_state; 4292 struct kvm_lapic_state kapic; 4293 int ret; 4294 4295 if (apic && kvm_irqchip_in_kernel()) { 4296 ret = kvm_vcpu_ioctl(CPU(cpu), KVM_GET_LAPIC, &kapic); 4297 if (ret < 0) { 4298 return ret; 4299 } 4300 4301 kvm_get_apic_state(apic, &kapic); 4302 } 4303 return 0; 4304 } 4305 4306 static int kvm_put_vcpu_events(X86CPU *cpu, int level) 4307 { 4308 CPUState *cs = CPU(cpu); 4309 CPUX86State *env = &cpu->env; 4310 struct kvm_vcpu_events events = {}; 4311 4312 events.flags = 0; 4313 4314 if (has_exception_payload) { 4315 events.flags |= KVM_VCPUEVENT_VALID_PAYLOAD; 4316 events.exception.pending = env->exception_pending; 4317 events.exception_has_payload = env->exception_has_payload; 4318 events.exception_payload = env->exception_payload; 4319 } 4320 events.exception.nr = env->exception_nr; 4321 events.exception.injected = env->exception_injected; 4322 events.exception.has_error_code = env->has_error_code; 4323 events.exception.error_code = env->error_code; 4324 4325 events.interrupt.injected = (env->interrupt_injected >= 0); 4326 events.interrupt.nr = env->interrupt_injected; 4327 events.interrupt.soft = env->soft_interrupt; 4328 4329 events.nmi.injected = env->nmi_injected; 4330 events.nmi.pending = env->nmi_pending; 4331 events.nmi.masked = !!(env->hflags2 & HF2_NMI_MASK); 4332 4333 events.sipi_vector = env->sipi_vector; 4334 4335 if (has_msr_smbase) { 4336 events.smi.smm = !!(env->hflags & HF_SMM_MASK); 4337 events.smi.smm_inside_nmi = !!(env->hflags2 & HF2_SMM_INSIDE_NMI_MASK); 4338 if (kvm_irqchip_in_kernel()) { 4339 /* As soon as these are moved to the kernel, remove them 4340 * from cs->interrupt_request. 4341 */ 4342 events.smi.pending = cs->interrupt_request & CPU_INTERRUPT_SMI; 4343 events.smi.latched_init = cs->interrupt_request & CPU_INTERRUPT_INIT; 4344 cs->interrupt_request &= ~(CPU_INTERRUPT_INIT | CPU_INTERRUPT_SMI); 4345 } else { 4346 /* Keep these in cs->interrupt_request. */ 4347 events.smi.pending = 0; 4348 events.smi.latched_init = 0; 4349 } 4350 /* Stop SMI delivery on old machine types to avoid a reboot 4351 * on an inward migration of an old VM. 4352 */ 4353 if (!cpu->kvm_no_smi_migration) { 4354 events.flags |= KVM_VCPUEVENT_VALID_SMM; 4355 } 4356 } 4357 4358 if (level >= KVM_PUT_RESET_STATE) { 4359 events.flags |= KVM_VCPUEVENT_VALID_NMI_PENDING; 4360 if (env->mp_state == KVM_MP_STATE_SIPI_RECEIVED) { 4361 events.flags |= KVM_VCPUEVENT_VALID_SIPI_VECTOR; 4362 } 4363 } 4364 4365 if (has_triple_fault_event) { 4366 events.flags |= KVM_VCPUEVENT_VALID_TRIPLE_FAULT; 4367 events.triple_fault.pending = env->triple_fault_pending; 4368 } 4369 4370 return kvm_vcpu_ioctl(CPU(cpu), KVM_SET_VCPU_EVENTS, &events); 4371 } 4372 4373 static int kvm_get_vcpu_events(X86CPU *cpu) 4374 { 4375 CPUX86State *env = &cpu->env; 4376 struct kvm_vcpu_events events; 4377 int ret; 4378 4379 memset(&events, 0, sizeof(events)); 4380 ret = kvm_vcpu_ioctl(CPU(cpu), KVM_GET_VCPU_EVENTS, &events); 4381 if (ret < 0) { 4382 return ret; 4383 } 4384 4385 if (events.flags & KVM_VCPUEVENT_VALID_PAYLOAD) { 4386 env->exception_pending = events.exception.pending; 4387 env->exception_has_payload = events.exception_has_payload; 4388 env->exception_payload = events.exception_payload; 4389 } else { 4390 env->exception_pending = 0; 4391 env->exception_has_payload = false; 4392 } 4393 env->exception_injected = events.exception.injected; 4394 env->exception_nr = 4395 (env->exception_pending || env->exception_injected) ? 4396 events.exception.nr : -1; 4397 env->has_error_code = events.exception.has_error_code; 4398 env->error_code = events.exception.error_code; 4399 4400 env->interrupt_injected = 4401 events.interrupt.injected ? events.interrupt.nr : -1; 4402 env->soft_interrupt = events.interrupt.soft; 4403 4404 env->nmi_injected = events.nmi.injected; 4405 env->nmi_pending = events.nmi.pending; 4406 if (events.nmi.masked) { 4407 env->hflags2 |= HF2_NMI_MASK; 4408 } else { 4409 env->hflags2 &= ~HF2_NMI_MASK; 4410 } 4411 4412 if (events.flags & KVM_VCPUEVENT_VALID_SMM) { 4413 if (events.smi.smm) { 4414 env->hflags |= HF_SMM_MASK; 4415 } else { 4416 env->hflags &= ~HF_SMM_MASK; 4417 } 4418 if (events.smi.pending) { 4419 cpu_interrupt(CPU(cpu), CPU_INTERRUPT_SMI); 4420 } else { 4421 cpu_reset_interrupt(CPU(cpu), CPU_INTERRUPT_SMI); 4422 } 4423 if (events.smi.smm_inside_nmi) { 4424 env->hflags2 |= HF2_SMM_INSIDE_NMI_MASK; 4425 } else { 4426 env->hflags2 &= ~HF2_SMM_INSIDE_NMI_MASK; 4427 } 4428 if (events.smi.latched_init) { 4429 cpu_interrupt(CPU(cpu), CPU_INTERRUPT_INIT); 4430 } else { 4431 cpu_reset_interrupt(CPU(cpu), CPU_INTERRUPT_INIT); 4432 } 4433 } 4434 4435 if (events.flags & KVM_VCPUEVENT_VALID_TRIPLE_FAULT) { 4436 env->triple_fault_pending = events.triple_fault.pending; 4437 } 4438 4439 env->sipi_vector = events.sipi_vector; 4440 4441 return 0; 4442 } 4443 4444 static int kvm_put_debugregs(X86CPU *cpu) 4445 { 4446 CPUX86State *env = &cpu->env; 4447 struct kvm_debugregs dbgregs; 4448 int i; 4449 4450 memset(&dbgregs, 0, sizeof(dbgregs)); 4451 for (i = 0; i < 4; i++) { 4452 dbgregs.db[i] = env->dr[i]; 4453 } 4454 dbgregs.dr6 = env->dr[6]; 4455 dbgregs.dr7 = env->dr[7]; 4456 dbgregs.flags = 0; 4457 4458 return kvm_vcpu_ioctl(CPU(cpu), KVM_SET_DEBUGREGS, &dbgregs); 4459 } 4460 4461 static int kvm_get_debugregs(X86CPU *cpu) 4462 { 4463 CPUX86State *env = &cpu->env; 4464 struct kvm_debugregs dbgregs; 4465 int i, ret; 4466 4467 ret = kvm_vcpu_ioctl(CPU(cpu), KVM_GET_DEBUGREGS, &dbgregs); 4468 if (ret < 0) { 4469 return ret; 4470 } 4471 for (i = 0; i < 4; i++) { 4472 env->dr[i] = dbgregs.db[i]; 4473 } 4474 env->dr[4] = env->dr[6] = dbgregs.dr6; 4475 env->dr[5] = env->dr[7] = dbgregs.dr7; 4476 4477 return 0; 4478 } 4479 4480 static int kvm_put_nested_state(X86CPU *cpu) 4481 { 4482 CPUX86State *env = &cpu->env; 4483 int max_nested_state_len = kvm_max_nested_state_length(); 4484 4485 if (!env->nested_state) { 4486 return 0; 4487 } 4488 4489 /* 4490 * Copy flags that are affected by reset from env->hflags and env->hflags2. 4491 */ 4492 if (env->hflags & HF_GUEST_MASK) { 4493 env->nested_state->flags |= KVM_STATE_NESTED_GUEST_MODE; 4494 } else { 4495 env->nested_state->flags &= ~KVM_STATE_NESTED_GUEST_MODE; 4496 } 4497 4498 /* Don't set KVM_STATE_NESTED_GIF_SET on VMX as it is illegal */ 4499 if (cpu_has_svm(env) && (env->hflags2 & HF2_GIF_MASK)) { 4500 env->nested_state->flags |= KVM_STATE_NESTED_GIF_SET; 4501 } else { 4502 env->nested_state->flags &= ~KVM_STATE_NESTED_GIF_SET; 4503 } 4504 4505 assert(env->nested_state->size <= max_nested_state_len); 4506 return kvm_vcpu_ioctl(CPU(cpu), KVM_SET_NESTED_STATE, env->nested_state); 4507 } 4508 4509 static int kvm_get_nested_state(X86CPU *cpu) 4510 { 4511 CPUX86State *env = &cpu->env; 4512 int max_nested_state_len = kvm_max_nested_state_length(); 4513 int ret; 4514 4515 if (!env->nested_state) { 4516 return 0; 4517 } 4518 4519 /* 4520 * It is possible that migration restored a smaller size into 4521 * nested_state->hdr.size than what our kernel support. 4522 * We preserve migration origin nested_state->hdr.size for 4523 * call to KVM_SET_NESTED_STATE but wish that our next call 4524 * to KVM_GET_NESTED_STATE will use max size our kernel support. 4525 */ 4526 env->nested_state->size = max_nested_state_len; 4527 4528 ret = kvm_vcpu_ioctl(CPU(cpu), KVM_GET_NESTED_STATE, env->nested_state); 4529 if (ret < 0) { 4530 return ret; 4531 } 4532 4533 /* 4534 * Copy flags that are affected by reset to env->hflags and env->hflags2. 4535 */ 4536 if (env->nested_state->flags & KVM_STATE_NESTED_GUEST_MODE) { 4537 env->hflags |= HF_GUEST_MASK; 4538 } else { 4539 env->hflags &= ~HF_GUEST_MASK; 4540 } 4541 4542 /* Keep HF2_GIF_MASK set on !SVM as x86_cpu_pending_interrupt() needs it */ 4543 if (cpu_has_svm(env)) { 4544 if (env->nested_state->flags & KVM_STATE_NESTED_GIF_SET) { 4545 env->hflags2 |= HF2_GIF_MASK; 4546 } else { 4547 env->hflags2 &= ~HF2_GIF_MASK; 4548 } 4549 } 4550 4551 return ret; 4552 } 4553 4554 int kvm_arch_put_registers(CPUState *cpu, int level) 4555 { 4556 X86CPU *x86_cpu = X86_CPU(cpu); 4557 int ret; 4558 4559 assert(cpu_is_stopped(cpu) || qemu_cpu_is_self(cpu)); 4560 4561 /* 4562 * Put MSR_IA32_FEATURE_CONTROL first, this ensures the VM gets out of VMX 4563 * root operation upon vCPU reset. kvm_put_msr_feature_control() should also 4564 * precede kvm_put_nested_state() when 'real' nested state is set. 4565 */ 4566 if (level >= KVM_PUT_RESET_STATE) { 4567 ret = kvm_put_msr_feature_control(x86_cpu); 4568 if (ret < 0) { 4569 return ret; 4570 } 4571 } 4572 4573 /* must be before kvm_put_nested_state so that EFER.SVME is set */ 4574 ret = has_sregs2 ? kvm_put_sregs2(x86_cpu) : kvm_put_sregs(x86_cpu); 4575 if (ret < 0) { 4576 return ret; 4577 } 4578 4579 if (level >= KVM_PUT_RESET_STATE) { 4580 ret = kvm_put_nested_state(x86_cpu); 4581 if (ret < 0) { 4582 return ret; 4583 } 4584 } 4585 4586 if (level == KVM_PUT_FULL_STATE) { 4587 /* We don't check for kvm_arch_set_tsc_khz() errors here, 4588 * because TSC frequency mismatch shouldn't abort migration, 4589 * unless the user explicitly asked for a more strict TSC 4590 * setting (e.g. using an explicit "tsc-freq" option). 4591 */ 4592 kvm_arch_set_tsc_khz(cpu); 4593 } 4594 4595 #ifdef CONFIG_XEN_EMU 4596 if (xen_mode == XEN_EMULATE && level == KVM_PUT_FULL_STATE) { 4597 ret = kvm_put_xen_state(cpu); 4598 if (ret < 0) { 4599 return ret; 4600 } 4601 } 4602 #endif 4603 4604 ret = kvm_getput_regs(x86_cpu, 1); 4605 if (ret < 0) { 4606 return ret; 4607 } 4608 ret = kvm_put_xsave(x86_cpu); 4609 if (ret < 0) { 4610 return ret; 4611 } 4612 ret = kvm_put_xcrs(x86_cpu); 4613 if (ret < 0) { 4614 return ret; 4615 } 4616 ret = kvm_put_msrs(x86_cpu, level); 4617 if (ret < 0) { 4618 return ret; 4619 } 4620 ret = kvm_put_vcpu_events(x86_cpu, level); 4621 if (ret < 0) { 4622 return ret; 4623 } 4624 if (level >= KVM_PUT_RESET_STATE) { 4625 ret = kvm_put_mp_state(x86_cpu); 4626 if (ret < 0) { 4627 return ret; 4628 } 4629 } 4630 4631 ret = kvm_put_tscdeadline_msr(x86_cpu); 4632 if (ret < 0) { 4633 return ret; 4634 } 4635 ret = kvm_put_debugregs(x86_cpu); 4636 if (ret < 0) { 4637 return ret; 4638 } 4639 return 0; 4640 } 4641 4642 int kvm_arch_get_registers(CPUState *cs) 4643 { 4644 X86CPU *cpu = X86_CPU(cs); 4645 int ret; 4646 4647 assert(cpu_is_stopped(cs) || qemu_cpu_is_self(cs)); 4648 4649 ret = kvm_get_vcpu_events(cpu); 4650 if (ret < 0) { 4651 goto out; 4652 } 4653 /* 4654 * KVM_GET_MPSTATE can modify CS and RIP, call it before 4655 * KVM_GET_REGS and KVM_GET_SREGS. 4656 */ 4657 ret = kvm_get_mp_state(cpu); 4658 if (ret < 0) { 4659 goto out; 4660 } 4661 ret = kvm_getput_regs(cpu, 0); 4662 if (ret < 0) { 4663 goto out; 4664 } 4665 ret = kvm_get_xsave(cpu); 4666 if (ret < 0) { 4667 goto out; 4668 } 4669 ret = kvm_get_xcrs(cpu); 4670 if (ret < 0) { 4671 goto out; 4672 } 4673 ret = has_sregs2 ? kvm_get_sregs2(cpu) : kvm_get_sregs(cpu); 4674 if (ret < 0) { 4675 goto out; 4676 } 4677 ret = kvm_get_msrs(cpu); 4678 if (ret < 0) { 4679 goto out; 4680 } 4681 ret = kvm_get_apic(cpu); 4682 if (ret < 0) { 4683 goto out; 4684 } 4685 ret = kvm_get_debugregs(cpu); 4686 if (ret < 0) { 4687 goto out; 4688 } 4689 ret = kvm_get_nested_state(cpu); 4690 if (ret < 0) { 4691 goto out; 4692 } 4693 #ifdef CONFIG_XEN_EMU 4694 if (xen_mode == XEN_EMULATE) { 4695 ret = kvm_get_xen_state(cs); 4696 if (ret < 0) { 4697 goto out; 4698 } 4699 } 4700 #endif 4701 ret = 0; 4702 out: 4703 cpu_sync_bndcs_hflags(&cpu->env); 4704 return ret; 4705 } 4706 4707 void kvm_arch_pre_run(CPUState *cpu, struct kvm_run *run) 4708 { 4709 X86CPU *x86_cpu = X86_CPU(cpu); 4710 CPUX86State *env = &x86_cpu->env; 4711 int ret; 4712 4713 /* Inject NMI */ 4714 if (cpu->interrupt_request & (CPU_INTERRUPT_NMI | CPU_INTERRUPT_SMI)) { 4715 if (cpu->interrupt_request & CPU_INTERRUPT_NMI) { 4716 qemu_mutex_lock_iothread(); 4717 cpu->interrupt_request &= ~CPU_INTERRUPT_NMI; 4718 qemu_mutex_unlock_iothread(); 4719 DPRINTF("injected NMI\n"); 4720 ret = kvm_vcpu_ioctl(cpu, KVM_NMI); 4721 if (ret < 0) { 4722 fprintf(stderr, "KVM: injection failed, NMI lost (%s)\n", 4723 strerror(-ret)); 4724 } 4725 } 4726 if (cpu->interrupt_request & CPU_INTERRUPT_SMI) { 4727 qemu_mutex_lock_iothread(); 4728 cpu->interrupt_request &= ~CPU_INTERRUPT_SMI; 4729 qemu_mutex_unlock_iothread(); 4730 DPRINTF("injected SMI\n"); 4731 ret = kvm_vcpu_ioctl(cpu, KVM_SMI); 4732 if (ret < 0) { 4733 fprintf(stderr, "KVM: injection failed, SMI lost (%s)\n", 4734 strerror(-ret)); 4735 } 4736 } 4737 } 4738 4739 if (!kvm_pic_in_kernel()) { 4740 qemu_mutex_lock_iothread(); 4741 } 4742 4743 /* Force the VCPU out of its inner loop to process any INIT requests 4744 * or (for userspace APIC, but it is cheap to combine the checks here) 4745 * pending TPR access reports. 4746 */ 4747 if (cpu->interrupt_request & (CPU_INTERRUPT_INIT | CPU_INTERRUPT_TPR)) { 4748 if ((cpu->interrupt_request & CPU_INTERRUPT_INIT) && 4749 !(env->hflags & HF_SMM_MASK)) { 4750 cpu->exit_request = 1; 4751 } 4752 if (cpu->interrupt_request & CPU_INTERRUPT_TPR) { 4753 cpu->exit_request = 1; 4754 } 4755 } 4756 4757 if (!kvm_pic_in_kernel()) { 4758 /* Try to inject an interrupt if the guest can accept it */ 4759 if (run->ready_for_interrupt_injection && 4760 (cpu->interrupt_request & CPU_INTERRUPT_HARD) && 4761 (env->eflags & IF_MASK)) { 4762 int irq; 4763 4764 cpu->interrupt_request &= ~CPU_INTERRUPT_HARD; 4765 irq = cpu_get_pic_interrupt(env); 4766 if (irq >= 0) { 4767 struct kvm_interrupt intr; 4768 4769 intr.irq = irq; 4770 DPRINTF("injected interrupt %d\n", irq); 4771 ret = kvm_vcpu_ioctl(cpu, KVM_INTERRUPT, &intr); 4772 if (ret < 0) { 4773 fprintf(stderr, 4774 "KVM: injection failed, interrupt lost (%s)\n", 4775 strerror(-ret)); 4776 } 4777 } 4778 } 4779 4780 /* If we have an interrupt but the guest is not ready to receive an 4781 * interrupt, request an interrupt window exit. This will 4782 * cause a return to userspace as soon as the guest is ready to 4783 * receive interrupts. */ 4784 if ((cpu->interrupt_request & CPU_INTERRUPT_HARD)) { 4785 run->request_interrupt_window = 1; 4786 } else { 4787 run->request_interrupt_window = 0; 4788 } 4789 4790 DPRINTF("setting tpr\n"); 4791 run->cr8 = cpu_get_apic_tpr(x86_cpu->apic_state); 4792 4793 qemu_mutex_unlock_iothread(); 4794 } 4795 } 4796 4797 static void kvm_rate_limit_on_bus_lock(void) 4798 { 4799 uint64_t delay_ns = ratelimit_calculate_delay(&bus_lock_ratelimit_ctrl, 1); 4800 4801 if (delay_ns) { 4802 g_usleep(delay_ns / SCALE_US); 4803 } 4804 } 4805 4806 MemTxAttrs kvm_arch_post_run(CPUState *cpu, struct kvm_run *run) 4807 { 4808 X86CPU *x86_cpu = X86_CPU(cpu); 4809 CPUX86State *env = &x86_cpu->env; 4810 4811 if (run->flags & KVM_RUN_X86_SMM) { 4812 env->hflags |= HF_SMM_MASK; 4813 } else { 4814 env->hflags &= ~HF_SMM_MASK; 4815 } 4816 if (run->if_flag) { 4817 env->eflags |= IF_MASK; 4818 } else { 4819 env->eflags &= ~IF_MASK; 4820 } 4821 if (run->flags & KVM_RUN_X86_BUS_LOCK) { 4822 kvm_rate_limit_on_bus_lock(); 4823 } 4824 4825 #ifdef CONFIG_XEN_EMU 4826 /* 4827 * If the callback is asserted as a GSI (or PCI INTx) then check if 4828 * vcpu_info->evtchn_upcall_pending has been cleared, and deassert 4829 * the callback IRQ if so. Ideally we could hook into the PIC/IOAPIC 4830 * EOI and only resample then, exactly how the VFIO eventfd pairs 4831 * are designed to work for level triggered interrupts. 4832 */ 4833 if (x86_cpu->env.xen_callback_asserted) { 4834 kvm_xen_maybe_deassert_callback(cpu); 4835 } 4836 #endif 4837 4838 /* We need to protect the apic state against concurrent accesses from 4839 * different threads in case the userspace irqchip is used. */ 4840 if (!kvm_irqchip_in_kernel()) { 4841 qemu_mutex_lock_iothread(); 4842 } 4843 cpu_set_apic_tpr(x86_cpu->apic_state, run->cr8); 4844 cpu_set_apic_base(x86_cpu->apic_state, run->apic_base); 4845 if (!kvm_irqchip_in_kernel()) { 4846 qemu_mutex_unlock_iothread(); 4847 } 4848 return cpu_get_mem_attrs(env); 4849 } 4850 4851 int kvm_arch_process_async_events(CPUState *cs) 4852 { 4853 X86CPU *cpu = X86_CPU(cs); 4854 CPUX86State *env = &cpu->env; 4855 4856 if (cs->interrupt_request & CPU_INTERRUPT_MCE) { 4857 /* We must not raise CPU_INTERRUPT_MCE if it's not supported. */ 4858 assert(env->mcg_cap); 4859 4860 cs->interrupt_request &= ~CPU_INTERRUPT_MCE; 4861 4862 kvm_cpu_synchronize_state(cs); 4863 4864 if (env->exception_nr == EXCP08_DBLE) { 4865 /* this means triple fault */ 4866 qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); 4867 cs->exit_request = 1; 4868 return 0; 4869 } 4870 kvm_queue_exception(env, EXCP12_MCHK, 0, 0); 4871 env->has_error_code = 0; 4872 4873 cs->halted = 0; 4874 if (kvm_irqchip_in_kernel() && env->mp_state == KVM_MP_STATE_HALTED) { 4875 env->mp_state = KVM_MP_STATE_RUNNABLE; 4876 } 4877 } 4878 4879 if ((cs->interrupt_request & CPU_INTERRUPT_INIT) && 4880 !(env->hflags & HF_SMM_MASK)) { 4881 kvm_cpu_synchronize_state(cs); 4882 do_cpu_init(cpu); 4883 } 4884 4885 if (kvm_irqchip_in_kernel()) { 4886 return 0; 4887 } 4888 4889 if (cs->interrupt_request & CPU_INTERRUPT_POLL) { 4890 cs->interrupt_request &= ~CPU_INTERRUPT_POLL; 4891 apic_poll_irq(cpu->apic_state); 4892 } 4893 if (((cs->interrupt_request & CPU_INTERRUPT_HARD) && 4894 (env->eflags & IF_MASK)) || 4895 (cs->interrupt_request & CPU_INTERRUPT_NMI)) { 4896 cs->halted = 0; 4897 } 4898 if (cs->interrupt_request & CPU_INTERRUPT_SIPI) { 4899 kvm_cpu_synchronize_state(cs); 4900 do_cpu_sipi(cpu); 4901 } 4902 if (cs->interrupt_request & CPU_INTERRUPT_TPR) { 4903 cs->interrupt_request &= ~CPU_INTERRUPT_TPR; 4904 kvm_cpu_synchronize_state(cs); 4905 apic_handle_tpr_access_report(cpu->apic_state, env->eip, 4906 env->tpr_access_type); 4907 } 4908 4909 return cs->halted; 4910 } 4911 4912 static int kvm_handle_halt(X86CPU *cpu) 4913 { 4914 CPUState *cs = CPU(cpu); 4915 CPUX86State *env = &cpu->env; 4916 4917 if (!((cs->interrupt_request & CPU_INTERRUPT_HARD) && 4918 (env->eflags & IF_MASK)) && 4919 !(cs->interrupt_request & CPU_INTERRUPT_NMI)) { 4920 cs->halted = 1; 4921 return EXCP_HLT; 4922 } 4923 4924 return 0; 4925 } 4926 4927 static int kvm_handle_tpr_access(X86CPU *cpu) 4928 { 4929 CPUState *cs = CPU(cpu); 4930 struct kvm_run *run = cs->kvm_run; 4931 4932 apic_handle_tpr_access_report(cpu->apic_state, run->tpr_access.rip, 4933 run->tpr_access.is_write ? TPR_ACCESS_WRITE 4934 : TPR_ACCESS_READ); 4935 return 1; 4936 } 4937 4938 int kvm_arch_insert_sw_breakpoint(CPUState *cs, struct kvm_sw_breakpoint *bp) 4939 { 4940 static const uint8_t int3 = 0xcc; 4941 4942 if (cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)&bp->saved_insn, 1, 0) || 4943 cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)&int3, 1, 1)) { 4944 return -EINVAL; 4945 } 4946 return 0; 4947 } 4948 4949 int kvm_arch_remove_sw_breakpoint(CPUState *cs, struct kvm_sw_breakpoint *bp) 4950 { 4951 uint8_t int3; 4952 4953 if (cpu_memory_rw_debug(cs, bp->pc, &int3, 1, 0)) { 4954 return -EINVAL; 4955 } 4956 if (int3 != 0xcc) { 4957 return 0; 4958 } 4959 if (cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)&bp->saved_insn, 1, 1)) { 4960 return -EINVAL; 4961 } 4962 return 0; 4963 } 4964 4965 static struct { 4966 target_ulong addr; 4967 int len; 4968 int type; 4969 } hw_breakpoint[4]; 4970 4971 static int nb_hw_breakpoint; 4972 4973 static int find_hw_breakpoint(target_ulong addr, int len, int type) 4974 { 4975 int n; 4976 4977 for (n = 0; n < nb_hw_breakpoint; n++) { 4978 if (hw_breakpoint[n].addr == addr && hw_breakpoint[n].type == type && 4979 (hw_breakpoint[n].len == len || len == -1)) { 4980 return n; 4981 } 4982 } 4983 return -1; 4984 } 4985 4986 int kvm_arch_insert_hw_breakpoint(vaddr addr, vaddr len, int type) 4987 { 4988 switch (type) { 4989 case GDB_BREAKPOINT_HW: 4990 len = 1; 4991 break; 4992 case GDB_WATCHPOINT_WRITE: 4993 case GDB_WATCHPOINT_ACCESS: 4994 switch (len) { 4995 case 1: 4996 break; 4997 case 2: 4998 case 4: 4999 case 8: 5000 if (addr & (len - 1)) { 5001 return -EINVAL; 5002 } 5003 break; 5004 default: 5005 return -EINVAL; 5006 } 5007 break; 5008 default: 5009 return -ENOSYS; 5010 } 5011 5012 if (nb_hw_breakpoint == 4) { 5013 return -ENOBUFS; 5014 } 5015 if (find_hw_breakpoint(addr, len, type) >= 0) { 5016 return -EEXIST; 5017 } 5018 hw_breakpoint[nb_hw_breakpoint].addr = addr; 5019 hw_breakpoint[nb_hw_breakpoint].len = len; 5020 hw_breakpoint[nb_hw_breakpoint].type = type; 5021 nb_hw_breakpoint++; 5022 5023 return 0; 5024 } 5025 5026 int kvm_arch_remove_hw_breakpoint(vaddr addr, vaddr len, int type) 5027 { 5028 int n; 5029 5030 n = find_hw_breakpoint(addr, (type == GDB_BREAKPOINT_HW) ? 1 : len, type); 5031 if (n < 0) { 5032 return -ENOENT; 5033 } 5034 nb_hw_breakpoint--; 5035 hw_breakpoint[n] = hw_breakpoint[nb_hw_breakpoint]; 5036 5037 return 0; 5038 } 5039 5040 void kvm_arch_remove_all_hw_breakpoints(void) 5041 { 5042 nb_hw_breakpoint = 0; 5043 } 5044 5045 static CPUWatchpoint hw_watchpoint; 5046 5047 static int kvm_handle_debug(X86CPU *cpu, 5048 struct kvm_debug_exit_arch *arch_info) 5049 { 5050 CPUState *cs = CPU(cpu); 5051 CPUX86State *env = &cpu->env; 5052 int ret = 0; 5053 int n; 5054 5055 if (arch_info->exception == EXCP01_DB) { 5056 if (arch_info->dr6 & DR6_BS) { 5057 if (cs->singlestep_enabled) { 5058 ret = EXCP_DEBUG; 5059 } 5060 } else { 5061 for (n = 0; n < 4; n++) { 5062 if (arch_info->dr6 & (1 << n)) { 5063 switch ((arch_info->dr7 >> (16 + n*4)) & 0x3) { 5064 case 0x0: 5065 ret = EXCP_DEBUG; 5066 break; 5067 case 0x1: 5068 ret = EXCP_DEBUG; 5069 cs->watchpoint_hit = &hw_watchpoint; 5070 hw_watchpoint.vaddr = hw_breakpoint[n].addr; 5071 hw_watchpoint.flags = BP_MEM_WRITE; 5072 break; 5073 case 0x3: 5074 ret = EXCP_DEBUG; 5075 cs->watchpoint_hit = &hw_watchpoint; 5076 hw_watchpoint.vaddr = hw_breakpoint[n].addr; 5077 hw_watchpoint.flags = BP_MEM_ACCESS; 5078 break; 5079 } 5080 } 5081 } 5082 } 5083 } else if (kvm_find_sw_breakpoint(cs, arch_info->pc)) { 5084 ret = EXCP_DEBUG; 5085 } 5086 if (ret == 0) { 5087 cpu_synchronize_state(cs); 5088 assert(env->exception_nr == -1); 5089 5090 /* pass to guest */ 5091 kvm_queue_exception(env, arch_info->exception, 5092 arch_info->exception == EXCP01_DB, 5093 arch_info->dr6); 5094 env->has_error_code = 0; 5095 } 5096 5097 return ret; 5098 } 5099 5100 void kvm_arch_update_guest_debug(CPUState *cpu, struct kvm_guest_debug *dbg) 5101 { 5102 const uint8_t type_code[] = { 5103 [GDB_BREAKPOINT_HW] = 0x0, 5104 [GDB_WATCHPOINT_WRITE] = 0x1, 5105 [GDB_WATCHPOINT_ACCESS] = 0x3 5106 }; 5107 const uint8_t len_code[] = { 5108 [1] = 0x0, [2] = 0x1, [4] = 0x3, [8] = 0x2 5109 }; 5110 int n; 5111 5112 if (kvm_sw_breakpoints_active(cpu)) { 5113 dbg->control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_SW_BP; 5114 } 5115 if (nb_hw_breakpoint > 0) { 5116 dbg->control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_HW_BP; 5117 dbg->arch.debugreg[7] = 0x0600; 5118 for (n = 0; n < nb_hw_breakpoint; n++) { 5119 dbg->arch.debugreg[n] = hw_breakpoint[n].addr; 5120 dbg->arch.debugreg[7] |= (2 << (n * 2)) | 5121 (type_code[hw_breakpoint[n].type] << (16 + n*4)) | 5122 ((uint32_t)len_code[hw_breakpoint[n].len] << (18 + n*4)); 5123 } 5124 } 5125 } 5126 5127 static bool kvm_install_msr_filters(KVMState *s) 5128 { 5129 uint64_t zero = 0; 5130 struct kvm_msr_filter filter = { 5131 .flags = KVM_MSR_FILTER_DEFAULT_ALLOW, 5132 }; 5133 int r, i, j = 0; 5134 5135 for (i = 0; i < KVM_MSR_FILTER_MAX_RANGES; i++) { 5136 KVMMSRHandlers *handler = &msr_handlers[i]; 5137 if (handler->msr) { 5138 struct kvm_msr_filter_range *range = &filter.ranges[j++]; 5139 5140 *range = (struct kvm_msr_filter_range) { 5141 .flags = 0, 5142 .nmsrs = 1, 5143 .base = handler->msr, 5144 .bitmap = (__u8 *)&zero, 5145 }; 5146 5147 if (handler->rdmsr) { 5148 range->flags |= KVM_MSR_FILTER_READ; 5149 } 5150 5151 if (handler->wrmsr) { 5152 range->flags |= KVM_MSR_FILTER_WRITE; 5153 } 5154 } 5155 } 5156 5157 r = kvm_vm_ioctl(s, KVM_X86_SET_MSR_FILTER, &filter); 5158 if (r) { 5159 return false; 5160 } 5161 5162 return true; 5163 } 5164 5165 bool kvm_filter_msr(KVMState *s, uint32_t msr, QEMURDMSRHandler *rdmsr, 5166 QEMUWRMSRHandler *wrmsr) 5167 { 5168 int i; 5169 5170 for (i = 0; i < ARRAY_SIZE(msr_handlers); i++) { 5171 if (!msr_handlers[i].msr) { 5172 msr_handlers[i] = (KVMMSRHandlers) { 5173 .msr = msr, 5174 .rdmsr = rdmsr, 5175 .wrmsr = wrmsr, 5176 }; 5177 5178 if (!kvm_install_msr_filters(s)) { 5179 msr_handlers[i] = (KVMMSRHandlers) { }; 5180 return false; 5181 } 5182 5183 return true; 5184 } 5185 } 5186 5187 return false; 5188 } 5189 5190 static int kvm_handle_rdmsr(X86CPU *cpu, struct kvm_run *run) 5191 { 5192 int i; 5193 bool r; 5194 5195 for (i = 0; i < ARRAY_SIZE(msr_handlers); i++) { 5196 KVMMSRHandlers *handler = &msr_handlers[i]; 5197 if (run->msr.index == handler->msr) { 5198 if (handler->rdmsr) { 5199 r = handler->rdmsr(cpu, handler->msr, 5200 (uint64_t *)&run->msr.data); 5201 run->msr.error = r ? 0 : 1; 5202 return 0; 5203 } 5204 } 5205 } 5206 5207 assert(false); 5208 } 5209 5210 static int kvm_handle_wrmsr(X86CPU *cpu, struct kvm_run *run) 5211 { 5212 int i; 5213 bool r; 5214 5215 for (i = 0; i < ARRAY_SIZE(msr_handlers); i++) { 5216 KVMMSRHandlers *handler = &msr_handlers[i]; 5217 if (run->msr.index == handler->msr) { 5218 if (handler->wrmsr) { 5219 r = handler->wrmsr(cpu, handler->msr, run->msr.data); 5220 run->msr.error = r ? 0 : 1; 5221 return 0; 5222 } 5223 } 5224 } 5225 5226 assert(false); 5227 } 5228 5229 static bool has_sgx_provisioning; 5230 5231 static bool __kvm_enable_sgx_provisioning(KVMState *s) 5232 { 5233 int fd, ret; 5234 5235 if (!kvm_vm_check_extension(s, KVM_CAP_SGX_ATTRIBUTE)) { 5236 return false; 5237 } 5238 5239 fd = qemu_open_old("/dev/sgx_provision", O_RDONLY); 5240 if (fd < 0) { 5241 return false; 5242 } 5243 5244 ret = kvm_vm_enable_cap(s, KVM_CAP_SGX_ATTRIBUTE, 0, fd); 5245 if (ret) { 5246 error_report("Could not enable SGX PROVISIONKEY: %s", strerror(-ret)); 5247 exit(1); 5248 } 5249 close(fd); 5250 return true; 5251 } 5252 5253 bool kvm_enable_sgx_provisioning(KVMState *s) 5254 { 5255 return MEMORIZE(__kvm_enable_sgx_provisioning(s), has_sgx_provisioning); 5256 } 5257 5258 static bool host_supports_vmx(void) 5259 { 5260 uint32_t ecx, unused; 5261 5262 host_cpuid(1, 0, &unused, &unused, &ecx, &unused); 5263 return ecx & CPUID_EXT_VMX; 5264 } 5265 5266 #define VMX_INVALID_GUEST_STATE 0x80000021 5267 5268 int kvm_arch_handle_exit(CPUState *cs, struct kvm_run *run) 5269 { 5270 X86CPU *cpu = X86_CPU(cs); 5271 uint64_t code; 5272 int ret; 5273 bool ctx_invalid; 5274 char str[256]; 5275 KVMState *state; 5276 5277 switch (run->exit_reason) { 5278 case KVM_EXIT_HLT: 5279 DPRINTF("handle_hlt\n"); 5280 qemu_mutex_lock_iothread(); 5281 ret = kvm_handle_halt(cpu); 5282 qemu_mutex_unlock_iothread(); 5283 break; 5284 case KVM_EXIT_SET_TPR: 5285 ret = 0; 5286 break; 5287 case KVM_EXIT_TPR_ACCESS: 5288 qemu_mutex_lock_iothread(); 5289 ret = kvm_handle_tpr_access(cpu); 5290 qemu_mutex_unlock_iothread(); 5291 break; 5292 case KVM_EXIT_FAIL_ENTRY: 5293 code = run->fail_entry.hardware_entry_failure_reason; 5294 fprintf(stderr, "KVM: entry failed, hardware error 0x%" PRIx64 "\n", 5295 code); 5296 if (host_supports_vmx() && code == VMX_INVALID_GUEST_STATE) { 5297 fprintf(stderr, 5298 "\nIf you're running a guest on an Intel machine without " 5299 "unrestricted mode\n" 5300 "support, the failure can be most likely due to the guest " 5301 "entering an invalid\n" 5302 "state for Intel VT. For example, the guest maybe running " 5303 "in big real mode\n" 5304 "which is not supported on less recent Intel processors." 5305 "\n\n"); 5306 } 5307 ret = -1; 5308 break; 5309 case KVM_EXIT_EXCEPTION: 5310 fprintf(stderr, "KVM: exception %d exit (error code 0x%x)\n", 5311 run->ex.exception, run->ex.error_code); 5312 ret = -1; 5313 break; 5314 case KVM_EXIT_DEBUG: 5315 DPRINTF("kvm_exit_debug\n"); 5316 qemu_mutex_lock_iothread(); 5317 ret = kvm_handle_debug(cpu, &run->debug.arch); 5318 qemu_mutex_unlock_iothread(); 5319 break; 5320 case KVM_EXIT_HYPERV: 5321 ret = kvm_hv_handle_exit(cpu, &run->hyperv); 5322 break; 5323 case KVM_EXIT_IOAPIC_EOI: 5324 ioapic_eoi_broadcast(run->eoi.vector); 5325 ret = 0; 5326 break; 5327 case KVM_EXIT_X86_BUS_LOCK: 5328 /* already handled in kvm_arch_post_run */ 5329 ret = 0; 5330 break; 5331 case KVM_EXIT_NOTIFY: 5332 ctx_invalid = !!(run->notify.flags & KVM_NOTIFY_CONTEXT_INVALID); 5333 state = KVM_STATE(current_accel()); 5334 sprintf(str, "Encounter a notify exit with %svalid context in" 5335 " guest. There can be possible misbehaves in guest." 5336 " Please have a look.", ctx_invalid ? "in" : ""); 5337 if (ctx_invalid || 5338 state->notify_vmexit == NOTIFY_VMEXIT_OPTION_INTERNAL_ERROR) { 5339 warn_report("KVM internal error: %s", str); 5340 ret = -1; 5341 } else { 5342 warn_report_once("KVM: %s", str); 5343 ret = 0; 5344 } 5345 break; 5346 case KVM_EXIT_X86_RDMSR: 5347 /* We only enable MSR filtering, any other exit is bogus */ 5348 assert(run->msr.reason == KVM_MSR_EXIT_REASON_FILTER); 5349 ret = kvm_handle_rdmsr(cpu, run); 5350 break; 5351 case KVM_EXIT_X86_WRMSR: 5352 /* We only enable MSR filtering, any other exit is bogus */ 5353 assert(run->msr.reason == KVM_MSR_EXIT_REASON_FILTER); 5354 ret = kvm_handle_wrmsr(cpu, run); 5355 break; 5356 #ifdef CONFIG_XEN_EMU 5357 case KVM_EXIT_XEN: 5358 ret = kvm_xen_handle_exit(cpu, &run->xen); 5359 break; 5360 #endif 5361 default: 5362 fprintf(stderr, "KVM: unknown exit reason %d\n", run->exit_reason); 5363 ret = -1; 5364 break; 5365 } 5366 5367 return ret; 5368 } 5369 5370 bool kvm_arch_stop_on_emulation_error(CPUState *cs) 5371 { 5372 X86CPU *cpu = X86_CPU(cs); 5373 CPUX86State *env = &cpu->env; 5374 5375 kvm_cpu_synchronize_state(cs); 5376 return !(env->cr[0] & CR0_PE_MASK) || 5377 ((env->segs[R_CS].selector & 3) != 3); 5378 } 5379 5380 void kvm_arch_init_irq_routing(KVMState *s) 5381 { 5382 /* We know at this point that we're using the in-kernel 5383 * irqchip, so we can use irqfds, and on x86 we know 5384 * we can use msi via irqfd and GSI routing. 5385 */ 5386 kvm_msi_via_irqfd_allowed = true; 5387 kvm_gsi_routing_allowed = true; 5388 5389 if (kvm_irqchip_is_split()) { 5390 KVMRouteChange c = kvm_irqchip_begin_route_changes(s); 5391 int i; 5392 5393 /* If the ioapic is in QEMU and the lapics are in KVM, reserve 5394 MSI routes for signaling interrupts to the local apics. */ 5395 for (i = 0; i < IOAPIC_NUM_PINS; i++) { 5396 if (kvm_irqchip_add_msi_route(&c, 0, NULL) < 0) { 5397 error_report("Could not enable split IRQ mode."); 5398 exit(1); 5399 } 5400 } 5401 kvm_irqchip_commit_route_changes(&c); 5402 } 5403 } 5404 5405 int kvm_arch_irqchip_create(KVMState *s) 5406 { 5407 int ret; 5408 if (kvm_kernel_irqchip_split()) { 5409 ret = kvm_vm_enable_cap(s, KVM_CAP_SPLIT_IRQCHIP, 0, 24); 5410 if (ret) { 5411 error_report("Could not enable split irqchip mode: %s", 5412 strerror(-ret)); 5413 exit(1); 5414 } else { 5415 DPRINTF("Enabled KVM_CAP_SPLIT_IRQCHIP\n"); 5416 kvm_split_irqchip = true; 5417 return 1; 5418 } 5419 } else { 5420 return 0; 5421 } 5422 } 5423 5424 uint64_t kvm_swizzle_msi_ext_dest_id(uint64_t address) 5425 { 5426 CPUX86State *env; 5427 uint64_t ext_id; 5428 5429 if (!first_cpu) { 5430 return address; 5431 } 5432 env = &X86_CPU(first_cpu)->env; 5433 if (!(env->features[FEAT_KVM] & (1 << KVM_FEATURE_MSI_EXT_DEST_ID))) { 5434 return address; 5435 } 5436 5437 /* 5438 * If the remappable format bit is set, or the upper bits are 5439 * already set in address_hi, or the low extended bits aren't 5440 * there anyway, do nothing. 5441 */ 5442 ext_id = address & (0xff << MSI_ADDR_DEST_IDX_SHIFT); 5443 if (!ext_id || (ext_id & (1 << MSI_ADDR_DEST_IDX_SHIFT)) || (address >> 32)) { 5444 return address; 5445 } 5446 5447 address &= ~ext_id; 5448 address |= ext_id << 35; 5449 return address; 5450 } 5451 5452 int kvm_arch_fixup_msi_route(struct kvm_irq_routing_entry *route, 5453 uint64_t address, uint32_t data, PCIDevice *dev) 5454 { 5455 X86IOMMUState *iommu = x86_iommu_get_default(); 5456 5457 if (iommu) { 5458 X86IOMMUClass *class = X86_IOMMU_DEVICE_GET_CLASS(iommu); 5459 5460 if (class->int_remap) { 5461 int ret; 5462 MSIMessage src, dst; 5463 5464 src.address = route->u.msi.address_hi; 5465 src.address <<= VTD_MSI_ADDR_HI_SHIFT; 5466 src.address |= route->u.msi.address_lo; 5467 src.data = route->u.msi.data; 5468 5469 ret = class->int_remap(iommu, &src, &dst, dev ? \ 5470 pci_requester_id(dev) : \ 5471 X86_IOMMU_SID_INVALID); 5472 if (ret) { 5473 trace_kvm_x86_fixup_msi_error(route->gsi); 5474 return 1; 5475 } 5476 5477 /* 5478 * Handled untranslated compatibility format interrupt with 5479 * extended destination ID in the low bits 11-5. */ 5480 dst.address = kvm_swizzle_msi_ext_dest_id(dst.address); 5481 5482 route->u.msi.address_hi = dst.address >> VTD_MSI_ADDR_HI_SHIFT; 5483 route->u.msi.address_lo = dst.address & VTD_MSI_ADDR_LO_MASK; 5484 route->u.msi.data = dst.data; 5485 return 0; 5486 } 5487 } 5488 5489 #ifdef CONFIG_XEN_EMU 5490 if (xen_mode == XEN_EMULATE) { 5491 int handled = xen_evtchn_translate_pirq_msi(route, address, data); 5492 5493 /* 5494 * If it was a PIRQ and successfully routed (handled == 0) or it was 5495 * an error (handled < 0), return. If it wasn't a PIRQ, keep going. 5496 */ 5497 if (handled <= 0) { 5498 return handled; 5499 } 5500 } 5501 #endif 5502 5503 address = kvm_swizzle_msi_ext_dest_id(address); 5504 route->u.msi.address_hi = address >> VTD_MSI_ADDR_HI_SHIFT; 5505 route->u.msi.address_lo = address & VTD_MSI_ADDR_LO_MASK; 5506 return 0; 5507 } 5508 5509 typedef struct MSIRouteEntry MSIRouteEntry; 5510 5511 struct MSIRouteEntry { 5512 PCIDevice *dev; /* Device pointer */ 5513 int vector; /* MSI/MSIX vector index */ 5514 int virq; /* Virtual IRQ index */ 5515 QLIST_ENTRY(MSIRouteEntry) list; 5516 }; 5517 5518 /* List of used GSI routes */ 5519 static QLIST_HEAD(, MSIRouteEntry) msi_route_list = \ 5520 QLIST_HEAD_INITIALIZER(msi_route_list); 5521 5522 void kvm_update_msi_routes_all(void *private, bool global, 5523 uint32_t index, uint32_t mask) 5524 { 5525 int cnt = 0, vector; 5526 MSIRouteEntry *entry; 5527 MSIMessage msg; 5528 PCIDevice *dev; 5529 5530 /* TODO: explicit route update */ 5531 QLIST_FOREACH(entry, &msi_route_list, list) { 5532 cnt++; 5533 vector = entry->vector; 5534 dev = entry->dev; 5535 if (msix_enabled(dev) && !msix_is_masked(dev, vector)) { 5536 msg = msix_get_message(dev, vector); 5537 } else if (msi_enabled(dev) && !msi_is_masked(dev, vector)) { 5538 msg = msi_get_message(dev, vector); 5539 } else { 5540 /* 5541 * Either MSI/MSIX is disabled for the device, or the 5542 * specific message was masked out. Skip this one. 5543 */ 5544 continue; 5545 } 5546 kvm_irqchip_update_msi_route(kvm_state, entry->virq, msg, dev); 5547 } 5548 kvm_irqchip_commit_routes(kvm_state); 5549 trace_kvm_x86_update_msi_routes(cnt); 5550 } 5551 5552 int kvm_arch_add_msi_route_post(struct kvm_irq_routing_entry *route, 5553 int vector, PCIDevice *dev) 5554 { 5555 static bool notify_list_inited = false; 5556 MSIRouteEntry *entry; 5557 5558 if (!dev) { 5559 /* These are (possibly) IOAPIC routes only used for split 5560 * kernel irqchip mode, while what we are housekeeping are 5561 * PCI devices only. */ 5562 return 0; 5563 } 5564 5565 entry = g_new0(MSIRouteEntry, 1); 5566 entry->dev = dev; 5567 entry->vector = vector; 5568 entry->virq = route->gsi; 5569 QLIST_INSERT_HEAD(&msi_route_list, entry, list); 5570 5571 trace_kvm_x86_add_msi_route(route->gsi); 5572 5573 if (!notify_list_inited) { 5574 /* For the first time we do add route, add ourselves into 5575 * IOMMU's IEC notify list if needed. */ 5576 X86IOMMUState *iommu = x86_iommu_get_default(); 5577 if (iommu) { 5578 x86_iommu_iec_register_notifier(iommu, 5579 kvm_update_msi_routes_all, 5580 NULL); 5581 } 5582 notify_list_inited = true; 5583 } 5584 return 0; 5585 } 5586 5587 int kvm_arch_release_virq_post(int virq) 5588 { 5589 MSIRouteEntry *entry, *next; 5590 QLIST_FOREACH_SAFE(entry, &msi_route_list, list, next) { 5591 if (entry->virq == virq) { 5592 trace_kvm_x86_remove_msi_route(virq); 5593 QLIST_REMOVE(entry, list); 5594 g_free(entry); 5595 break; 5596 } 5597 } 5598 return 0; 5599 } 5600 5601 int kvm_arch_msi_data_to_gsi(uint32_t data) 5602 { 5603 abort(); 5604 } 5605 5606 bool kvm_has_waitpkg(void) 5607 { 5608 return has_msr_umwait; 5609 } 5610 5611 bool kvm_arch_cpu_check_are_resettable(void) 5612 { 5613 return !sev_es_enabled(); 5614 } 5615 5616 #define ARCH_REQ_XCOMP_GUEST_PERM 0x1025 5617 5618 void kvm_request_xsave_components(X86CPU *cpu, uint64_t mask) 5619 { 5620 KVMState *s = kvm_state; 5621 uint64_t supported; 5622 5623 mask &= XSTATE_DYNAMIC_MASK; 5624 if (!mask) { 5625 return; 5626 } 5627 /* 5628 * Just ignore bits that are not in CPUID[EAX=0xD,ECX=0]. 5629 * ARCH_REQ_XCOMP_GUEST_PERM would fail, and QEMU has warned 5630 * about them already because they are not supported features. 5631 */ 5632 supported = kvm_arch_get_supported_cpuid(s, 0xd, 0, R_EAX); 5633 supported |= (uint64_t)kvm_arch_get_supported_cpuid(s, 0xd, 0, R_EDX) << 32; 5634 mask &= supported; 5635 5636 while (mask) { 5637 int bit = ctz64(mask); 5638 int rc = syscall(SYS_arch_prctl, ARCH_REQ_XCOMP_GUEST_PERM, bit); 5639 if (rc) { 5640 /* 5641 * Older kernel version (<5.17) do not support 5642 * ARCH_REQ_XCOMP_GUEST_PERM, but also do not return 5643 * any dynamic feature from kvm_arch_get_supported_cpuid. 5644 */ 5645 warn_report("prctl(ARCH_REQ_XCOMP_GUEST_PERM) failure " 5646 "for feature bit %d", bit); 5647 } 5648 mask &= ~BIT_ULL(bit); 5649 } 5650 } 5651 5652 static int kvm_arch_get_notify_vmexit(Object *obj, Error **errp) 5653 { 5654 KVMState *s = KVM_STATE(obj); 5655 return s->notify_vmexit; 5656 } 5657 5658 static void kvm_arch_set_notify_vmexit(Object *obj, int value, Error **errp) 5659 { 5660 KVMState *s = KVM_STATE(obj); 5661 5662 if (s->fd != -1) { 5663 error_setg(errp, "Cannot set properties after the accelerator has been initialized"); 5664 return; 5665 } 5666 5667 s->notify_vmexit = value; 5668 } 5669 5670 static void kvm_arch_get_notify_window(Object *obj, Visitor *v, 5671 const char *name, void *opaque, 5672 Error **errp) 5673 { 5674 KVMState *s = KVM_STATE(obj); 5675 uint32_t value = s->notify_window; 5676 5677 visit_type_uint32(v, name, &value, errp); 5678 } 5679 5680 static void kvm_arch_set_notify_window(Object *obj, Visitor *v, 5681 const char *name, void *opaque, 5682 Error **errp) 5683 { 5684 KVMState *s = KVM_STATE(obj); 5685 uint32_t value; 5686 5687 if (s->fd != -1) { 5688 error_setg(errp, "Cannot set properties after the accelerator has been initialized"); 5689 return; 5690 } 5691 5692 if (!visit_type_uint32(v, name, &value, errp)) { 5693 return; 5694 } 5695 5696 s->notify_window = value; 5697 } 5698 5699 static void kvm_arch_get_xen_version(Object *obj, Visitor *v, 5700 const char *name, void *opaque, 5701 Error **errp) 5702 { 5703 KVMState *s = KVM_STATE(obj); 5704 uint32_t value = s->xen_version; 5705 5706 visit_type_uint32(v, name, &value, errp); 5707 } 5708 5709 static void kvm_arch_set_xen_version(Object *obj, Visitor *v, 5710 const char *name, void *opaque, 5711 Error **errp) 5712 { 5713 KVMState *s = KVM_STATE(obj); 5714 Error *error = NULL; 5715 uint32_t value; 5716 5717 visit_type_uint32(v, name, &value, &error); 5718 if (error) { 5719 error_propagate(errp, error); 5720 return; 5721 } 5722 5723 s->xen_version = value; 5724 if (value && xen_mode == XEN_DISABLED) { 5725 xen_mode = XEN_EMULATE; 5726 } 5727 } 5728 5729 static void kvm_arch_get_xen_gnttab_max_frames(Object *obj, Visitor *v, 5730 const char *name, void *opaque, 5731 Error **errp) 5732 { 5733 KVMState *s = KVM_STATE(obj); 5734 uint16_t value = s->xen_gnttab_max_frames; 5735 5736 visit_type_uint16(v, name, &value, errp); 5737 } 5738 5739 static void kvm_arch_set_xen_gnttab_max_frames(Object *obj, Visitor *v, 5740 const char *name, void *opaque, 5741 Error **errp) 5742 { 5743 KVMState *s = KVM_STATE(obj); 5744 Error *error = NULL; 5745 uint16_t value; 5746 5747 visit_type_uint16(v, name, &value, &error); 5748 if (error) { 5749 error_propagate(errp, error); 5750 return; 5751 } 5752 5753 s->xen_gnttab_max_frames = value; 5754 } 5755 5756 static void kvm_arch_get_xen_evtchn_max_pirq(Object *obj, Visitor *v, 5757 const char *name, void *opaque, 5758 Error **errp) 5759 { 5760 KVMState *s = KVM_STATE(obj); 5761 uint16_t value = s->xen_evtchn_max_pirq; 5762 5763 visit_type_uint16(v, name, &value, errp); 5764 } 5765 5766 static void kvm_arch_set_xen_evtchn_max_pirq(Object *obj, Visitor *v, 5767 const char *name, void *opaque, 5768 Error **errp) 5769 { 5770 KVMState *s = KVM_STATE(obj); 5771 Error *error = NULL; 5772 uint16_t value; 5773 5774 visit_type_uint16(v, name, &value, &error); 5775 if (error) { 5776 error_propagate(errp, error); 5777 return; 5778 } 5779 5780 s->xen_evtchn_max_pirq = value; 5781 } 5782 5783 void kvm_arch_accel_class_init(ObjectClass *oc) 5784 { 5785 object_class_property_add_enum(oc, "notify-vmexit", "NotifyVMexitOption", 5786 &NotifyVmexitOption_lookup, 5787 kvm_arch_get_notify_vmexit, 5788 kvm_arch_set_notify_vmexit); 5789 object_class_property_set_description(oc, "notify-vmexit", 5790 "Enable notify VM exit"); 5791 5792 object_class_property_add(oc, "notify-window", "uint32", 5793 kvm_arch_get_notify_window, 5794 kvm_arch_set_notify_window, 5795 NULL, NULL); 5796 object_class_property_set_description(oc, "notify-window", 5797 "Clock cycles without an event window " 5798 "after which a notification VM exit occurs"); 5799 5800 object_class_property_add(oc, "xen-version", "uint32", 5801 kvm_arch_get_xen_version, 5802 kvm_arch_set_xen_version, 5803 NULL, NULL); 5804 object_class_property_set_description(oc, "xen-version", 5805 "Xen version to be emulated " 5806 "(in XENVER_version form " 5807 "e.g. 0x4000a for 4.10)"); 5808 5809 object_class_property_add(oc, "xen-gnttab-max-frames", "uint16", 5810 kvm_arch_get_xen_gnttab_max_frames, 5811 kvm_arch_set_xen_gnttab_max_frames, 5812 NULL, NULL); 5813 object_class_property_set_description(oc, "xen-gnttab-max-frames", 5814 "Maximum number of grant table frames"); 5815 5816 object_class_property_add(oc, "xen-evtchn-max-pirq", "uint16", 5817 kvm_arch_get_xen_evtchn_max_pirq, 5818 kvm_arch_set_xen_evtchn_max_pirq, 5819 NULL, NULL); 5820 object_class_property_set_description(oc, "xen-evtchn-max-pirq", 5821 "Maximum number of Xen PIRQs"); 5822 } 5823 5824 void kvm_set_max_apic_id(uint32_t max_apic_id) 5825 { 5826 kvm_vm_enable_cap(kvm_state, KVM_CAP_MAX_VCPU_ID, 0, max_apic_id); 5827 } 5828