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 <math.h> 20 #include <sys/ioctl.h> 21 #include <sys/utsname.h> 22 #include <sys/syscall.h> 23 #include <sys/resource.h> 24 #include <sys/time.h> 25 26 #include <linux/kvm.h> 27 #include <linux/kvm_para.h> 28 #include "standard-headers/asm-x86/kvm_para.h" 29 #include "hw/xen/interface/arch-x86/cpuid.h" 30 31 #include "cpu.h" 32 #include "host-cpu.h" 33 #include "vmsr_energy.h" 34 #include "system/system.h" 35 #include "system/hw_accel.h" 36 #include "system/kvm_int.h" 37 #include "system/runstate.h" 38 #include "kvm_i386.h" 39 #include "../confidential-guest.h" 40 #include "sev.h" 41 #include "tdx.h" 42 #include "xen-emu.h" 43 #include "hyperv.h" 44 #include "hyperv-proto.h" 45 46 #include "gdbstub/enums.h" 47 #include "qemu/host-utils.h" 48 #include "qemu/main-loop.h" 49 #include "qemu/ratelimit.h" 50 #include "qemu/config-file.h" 51 #include "qemu/error-report.h" 52 #include "qemu/memalign.h" 53 #include "hw/i386/x86.h" 54 #include "hw/i386/kvm/xen_evtchn.h" 55 #include "hw/i386/pc.h" 56 #include "hw/i386/apic.h" 57 #include "hw/i386/apic_internal.h" 58 #include "hw/i386/apic-msidef.h" 59 #include "hw/i386/intel_iommu.h" 60 #include "hw/i386/topology.h" 61 #include "hw/i386/x86-iommu.h" 62 #include "hw/i386/e820_memory_layout.h" 63 64 #include "hw/xen/xen.h" 65 66 #include "hw/pci/pci.h" 67 #include "hw/pci/msi.h" 68 #include "hw/pci/msix.h" 69 #include "migration/blocker.h" 70 #include "exec/memattrs.h" 71 #include "exec/target_page.h" 72 #include "trace.h" 73 74 #include CONFIG_DEVICES 75 76 //#define DEBUG_KVM 77 78 #ifdef DEBUG_KVM 79 #define DPRINTF(fmt, ...) \ 80 do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) 81 #else 82 #define DPRINTF(fmt, ...) \ 83 do { } while (0) 84 #endif 85 86 /* 87 * On older Intel CPUs, KVM uses vm86 mode to emulate 16-bit code directly. 88 * In order to use vm86 mode, an EPT identity map and a TSS are needed. 89 * Since these must be part of guest physical memory, we need to allocate 90 * them, both by setting their start addresses in the kernel and by 91 * creating a corresponding e820 entry. We need 4 pages before the BIOS, 92 * so this value allows up to 16M BIOSes. 93 */ 94 #define KVM_IDENTITY_BASE 0xfeffc000 95 96 /* From arch/x86/kvm/lapic.h */ 97 #define KVM_APIC_BUS_CYCLE_NS 1 98 #define KVM_APIC_BUS_FREQUENCY (1000000000ULL / KVM_APIC_BUS_CYCLE_NS) 99 100 /* A 4096-byte buffer can hold the 8-byte kvm_msrs header, plus 101 * 255 kvm_msr_entry structs */ 102 #define MSR_BUF_SIZE 4096 103 104 typedef bool QEMURDMSRHandler(X86CPU *cpu, uint32_t msr, uint64_t *val); 105 typedef bool QEMUWRMSRHandler(X86CPU *cpu, uint32_t msr, uint64_t val); 106 typedef struct { 107 uint32_t msr; 108 QEMURDMSRHandler *rdmsr; 109 QEMUWRMSRHandler *wrmsr; 110 } KVMMSRHandlers; 111 112 static void kvm_init_msrs(X86CPU *cpu); 113 static int kvm_filter_msr(KVMState *s, uint32_t msr, QEMURDMSRHandler *rdmsr, 114 QEMUWRMSRHandler *wrmsr); 115 116 const KVMCapabilityInfo kvm_arch_required_capabilities[] = { 117 KVM_CAP_INFO(SET_TSS_ADDR), 118 KVM_CAP_INFO(EXT_CPUID), 119 KVM_CAP_INFO(MP_STATE), 120 KVM_CAP_INFO(SIGNAL_MSI), 121 KVM_CAP_INFO(IRQ_ROUTING), 122 KVM_CAP_INFO(DEBUGREGS), 123 KVM_CAP_INFO(XSAVE), 124 KVM_CAP_INFO(VCPU_EVENTS), 125 KVM_CAP_INFO(X86_ROBUST_SINGLESTEP), 126 KVM_CAP_INFO(MCE), 127 KVM_CAP_INFO(ADJUST_CLOCK), 128 KVM_CAP_INFO(SET_IDENTITY_MAP_ADDR), 129 KVM_CAP_LAST_INFO 130 }; 131 132 static bool has_msr_star; 133 static bool has_msr_hsave_pa; 134 static bool has_msr_tsc_aux; 135 static bool has_msr_tsc_adjust; 136 static bool has_msr_tsc_deadline; 137 static bool has_msr_feature_control; 138 static bool has_msr_misc_enable; 139 static bool has_msr_smbase; 140 static bool has_msr_bndcfgs; 141 static int lm_capable_kernel; 142 static bool has_msr_hv_hypercall; 143 static bool has_msr_hv_crash; 144 static bool has_msr_hv_reset; 145 static bool has_msr_hv_vpindex; 146 static bool hv_vpindex_settable; 147 static bool has_msr_hv_runtime; 148 static bool has_msr_hv_synic; 149 static bool has_msr_hv_stimer; 150 static bool has_msr_hv_frequencies; 151 static bool has_msr_hv_reenlightenment; 152 static bool has_msr_hv_syndbg_options; 153 static bool has_msr_xss; 154 static bool has_msr_umwait; 155 static bool has_msr_spec_ctrl; 156 static bool has_tsc_scale_msr; 157 static bool has_msr_tsx_ctrl; 158 static bool has_msr_virt_ssbd; 159 static bool has_msr_smi_count; 160 static bool has_msr_arch_capabs; 161 static bool has_msr_core_capabs; 162 static bool has_msr_vmx_vmfunc; 163 static bool has_msr_ucode_rev; 164 static bool has_msr_vmx_procbased_ctls2; 165 static bool has_msr_perf_capabs; 166 static bool has_msr_pkrs; 167 static bool has_msr_hwcr; 168 169 static uint32_t has_architectural_pmu_version; 170 static uint32_t num_architectural_pmu_gp_counters; 171 static uint32_t num_architectural_pmu_fixed_counters; 172 173 static int has_xsave2; 174 static int has_xcrs; 175 static int has_sregs2; 176 static int has_exception_payload; 177 static int has_triple_fault_event; 178 179 static bool has_msr_mcg_ext_ctl; 180 181 static struct kvm_cpuid2 *cpuid_cache; 182 static struct kvm_cpuid2 *hv_cpuid_cache; 183 static struct kvm_msr_list *kvm_feature_msrs; 184 185 static KVMMSRHandlers msr_handlers[KVM_MSR_FILTER_MAX_RANGES]; 186 187 #define BUS_LOCK_SLICE_TIME 1000000000ULL /* ns */ 188 static RateLimit bus_lock_ratelimit_ctrl; 189 static int kvm_get_one_msr(X86CPU *cpu, int index, uint64_t *value); 190 191 static const char *vm_type_name[] = { 192 [KVM_X86_DEFAULT_VM] = "default", 193 [KVM_X86_SEV_VM] = "SEV", 194 [KVM_X86_SEV_ES_VM] = "SEV-ES", 195 [KVM_X86_SNP_VM] = "SEV-SNP", 196 [KVM_X86_TDX_VM] = "TDX", 197 }; 198 199 bool kvm_is_vm_type_supported(int type) 200 { 201 uint32_t machine_types; 202 203 /* 204 * old KVM doesn't support KVM_CAP_VM_TYPES but KVM_X86_DEFAULT_VM 205 * is always supported 206 */ 207 if (type == KVM_X86_DEFAULT_VM) { 208 return true; 209 } 210 211 machine_types = kvm_check_extension(KVM_STATE(current_machine->accelerator), 212 KVM_CAP_VM_TYPES); 213 return !!(machine_types & BIT(type)); 214 } 215 216 int kvm_get_vm_type(MachineState *ms) 217 { 218 int kvm_type = KVM_X86_DEFAULT_VM; 219 220 if (ms->cgs) { 221 if (!object_dynamic_cast(OBJECT(ms->cgs), TYPE_X86_CONFIDENTIAL_GUEST)) { 222 error_report("configuration type %s not supported for x86 guests", 223 object_get_typename(OBJECT(ms->cgs))); 224 exit(1); 225 } 226 kvm_type = x86_confidential_guest_kvm_type( 227 X86_CONFIDENTIAL_GUEST(ms->cgs)); 228 } 229 230 if (!kvm_is_vm_type_supported(kvm_type)) { 231 error_report("vm-type %s not supported by KVM", vm_type_name[kvm_type]); 232 exit(1); 233 } 234 235 return kvm_type; 236 } 237 238 bool kvm_enable_hypercall(uint64_t enable_mask) 239 { 240 KVMState *s = KVM_STATE(current_accel()); 241 242 return !kvm_vm_enable_cap(s, KVM_CAP_EXIT_HYPERCALL, 0, enable_mask); 243 } 244 245 bool kvm_has_smm(void) 246 { 247 return kvm_vm_check_extension(kvm_state, KVM_CAP_X86_SMM); 248 } 249 250 bool kvm_has_adjust_clock_stable(void) 251 { 252 int ret = kvm_check_extension(kvm_state, KVM_CAP_ADJUST_CLOCK); 253 254 return (ret & KVM_CLOCK_TSC_STABLE); 255 } 256 257 bool kvm_has_exception_payload(void) 258 { 259 return has_exception_payload; 260 } 261 262 static bool kvm_x2apic_api_set_flags(uint64_t flags) 263 { 264 KVMState *s = KVM_STATE(current_accel()); 265 266 return !kvm_vm_enable_cap(s, KVM_CAP_X2APIC_API, 0, flags); 267 } 268 269 #define MEMORIZE(fn, _result) \ 270 ({ \ 271 static bool _memorized; \ 272 \ 273 if (_memorized) { \ 274 return _result; \ 275 } \ 276 _memorized = true; \ 277 _result = fn; \ 278 }) 279 280 static bool has_x2apic_api; 281 282 bool kvm_has_x2apic_api(void) 283 { 284 return has_x2apic_api; 285 } 286 287 bool kvm_enable_x2apic(void) 288 { 289 return MEMORIZE( 290 kvm_x2apic_api_set_flags(KVM_X2APIC_API_USE_32BIT_IDS | 291 KVM_X2APIC_API_DISABLE_BROADCAST_QUIRK), 292 has_x2apic_api); 293 } 294 295 bool kvm_hv_vpindex_settable(void) 296 { 297 return hv_vpindex_settable; 298 } 299 300 static int kvm_get_tsc(CPUState *cs) 301 { 302 X86CPU *cpu = X86_CPU(cs); 303 CPUX86State *env = &cpu->env; 304 uint64_t value; 305 int ret; 306 307 if (env->tsc_valid) { 308 return 0; 309 } 310 311 env->tsc_valid = !runstate_is_running(); 312 313 ret = kvm_get_one_msr(cpu, MSR_IA32_TSC, &value); 314 if (ret < 0) { 315 return ret; 316 } 317 318 env->tsc = value; 319 return 0; 320 } 321 322 static inline void do_kvm_synchronize_tsc(CPUState *cpu, run_on_cpu_data arg) 323 { 324 kvm_get_tsc(cpu); 325 } 326 327 void kvm_synchronize_all_tsc(void) 328 { 329 CPUState *cpu; 330 331 if (kvm_enabled() && !is_tdx_vm()) { 332 CPU_FOREACH(cpu) { 333 run_on_cpu(cpu, do_kvm_synchronize_tsc, RUN_ON_CPU_NULL); 334 } 335 } 336 } 337 338 static struct kvm_cpuid2 *try_get_cpuid(KVMState *s, int max) 339 { 340 struct kvm_cpuid2 *cpuid; 341 int r, size; 342 343 size = sizeof(*cpuid) + max * sizeof(*cpuid->entries); 344 cpuid = g_malloc0(size); 345 cpuid->nent = max; 346 r = kvm_ioctl(s, KVM_GET_SUPPORTED_CPUID, cpuid); 347 if (r == 0 && cpuid->nent >= max) { 348 r = -E2BIG; 349 } 350 if (r < 0) { 351 if (r == -E2BIG) { 352 g_free(cpuid); 353 return NULL; 354 } else { 355 fprintf(stderr, "KVM_GET_SUPPORTED_CPUID failed: %s\n", 356 strerror(-r)); 357 exit(1); 358 } 359 } 360 return cpuid; 361 } 362 363 /* Run KVM_GET_SUPPORTED_CPUID ioctl(), allocating a buffer large enough 364 * for all entries. 365 */ 366 static struct kvm_cpuid2 *get_supported_cpuid(KVMState *s) 367 { 368 struct kvm_cpuid2 *cpuid; 369 int max = 1; 370 371 if (cpuid_cache != NULL) { 372 return cpuid_cache; 373 } 374 while ((cpuid = try_get_cpuid(s, max)) == NULL) { 375 max *= 2; 376 } 377 cpuid_cache = cpuid; 378 return cpuid; 379 } 380 381 static bool host_tsx_broken(void) 382 { 383 int family, model, stepping;\ 384 char vendor[CPUID_VENDOR_SZ + 1]; 385 386 host_cpu_vendor_fms(vendor, &family, &model, &stepping); 387 388 /* Check if we are running on a Haswell host known to have broken TSX */ 389 return !strcmp(vendor, CPUID_VENDOR_INTEL) && 390 (family == 6) && 391 ((model == 63 && stepping < 4) || 392 model == 60 || model == 69 || model == 70); 393 } 394 395 /* Returns the value for a specific register on the cpuid entry 396 */ 397 uint32_t cpuid_entry_get_reg(struct kvm_cpuid_entry2 *entry, int reg) 398 { 399 uint32_t ret = 0; 400 switch (reg) { 401 case R_EAX: 402 ret = entry->eax; 403 break; 404 case R_EBX: 405 ret = entry->ebx; 406 break; 407 case R_ECX: 408 ret = entry->ecx; 409 break; 410 case R_EDX: 411 ret = entry->edx; 412 break; 413 } 414 return ret; 415 } 416 417 /* Find matching entry for function/index on kvm_cpuid2 struct 418 */ 419 struct kvm_cpuid_entry2 *cpuid_find_entry(struct kvm_cpuid2 *cpuid, 420 uint32_t function, 421 uint32_t index) 422 { 423 int i; 424 for (i = 0; i < cpuid->nent; ++i) { 425 if (cpuid->entries[i].function == function && 426 cpuid->entries[i].index == index) { 427 return &cpuid->entries[i]; 428 } 429 } 430 /* not found: */ 431 return NULL; 432 } 433 434 uint32_t kvm_arch_get_supported_cpuid(KVMState *s, uint32_t function, 435 uint32_t index, int reg) 436 { 437 struct kvm_cpuid2 *cpuid; 438 uint32_t ret = 0; 439 uint32_t cpuid_1_edx, unused; 440 uint64_t bitmask; 441 442 cpuid = get_supported_cpuid(s); 443 444 struct kvm_cpuid_entry2 *entry = cpuid_find_entry(cpuid, function, index); 445 if (entry) { 446 ret = cpuid_entry_get_reg(entry, reg); 447 } 448 449 /* Fixups for the data returned by KVM, below */ 450 451 if (function == 1 && reg == R_EDX) { 452 /* KVM before 2.6.30 misreports the following features */ 453 ret |= CPUID_MTRR | CPUID_PAT | CPUID_MCE | CPUID_MCA; 454 /* KVM never reports CPUID_HT but QEMU can support when vcpus > 1 */ 455 ret |= CPUID_HT; 456 } else if (function == 1 && reg == R_ECX) { 457 /* We can set the hypervisor flag, even if KVM does not return it on 458 * GET_SUPPORTED_CPUID 459 */ 460 ret |= CPUID_EXT_HYPERVISOR; 461 /* tsc-deadline flag is not returned by GET_SUPPORTED_CPUID, but it 462 * can be enabled if the kernel has KVM_CAP_TSC_DEADLINE_TIMER, 463 * and the irqchip is in the kernel. 464 */ 465 if (kvm_irqchip_in_kernel() && 466 kvm_check_extension(s, KVM_CAP_TSC_DEADLINE_TIMER)) { 467 ret |= CPUID_EXT_TSC_DEADLINE_TIMER; 468 } 469 470 /* x2apic is reported by GET_SUPPORTED_CPUID, but it can't be enabled 471 * without the in-kernel irqchip 472 */ 473 if (!kvm_irqchip_in_kernel()) { 474 ret &= ~CPUID_EXT_X2APIC; 475 } 476 477 if (enable_cpu_pm) { 478 int disable_exits = kvm_check_extension(s, 479 KVM_CAP_X86_DISABLE_EXITS); 480 481 if (disable_exits & KVM_X86_DISABLE_EXITS_MWAIT) { 482 ret |= CPUID_EXT_MONITOR; 483 } 484 } 485 } else if (function == 6 && reg == R_EAX) { 486 ret |= CPUID_6_EAX_ARAT; /* safe to allow because of emulated APIC */ 487 } else if (function == 7 && index == 0 && reg == R_EBX) { 488 /* Not new instructions, just an optimization. */ 489 uint32_t ebx; 490 host_cpuid(7, 0, &unused, &ebx, &unused, &unused); 491 ret |= ebx & CPUID_7_0_EBX_ERMS; 492 493 if (host_tsx_broken()) { 494 ret &= ~(CPUID_7_0_EBX_RTM | CPUID_7_0_EBX_HLE); 495 } 496 } else if (function == 7 && index == 0 && reg == R_EDX) { 497 /* Not new instructions, just an optimization. */ 498 uint32_t edx; 499 host_cpuid(7, 0, &unused, &unused, &unused, &edx); 500 ret |= edx & CPUID_7_0_EDX_FSRM; 501 502 /* 503 * Linux v4.17-v4.20 incorrectly return ARCH_CAPABILITIES on SVM hosts. 504 * We can detect the bug by checking if MSR_IA32_ARCH_CAPABILITIES is 505 * returned by KVM_GET_MSR_INDEX_LIST. 506 */ 507 if (!has_msr_arch_capabs) { 508 ret &= ~CPUID_7_0_EDX_ARCH_CAPABILITIES; 509 } 510 } else if (function == 7 && index == 1 && reg == R_EAX) { 511 /* Not new instructions, just an optimization. */ 512 uint32_t eax; 513 host_cpuid(7, 1, &eax, &unused, &unused, &unused); 514 ret |= eax & (CPUID_7_1_EAX_FZRM | CPUID_7_1_EAX_FSRS | CPUID_7_1_EAX_FSRC); 515 } else if (function == 7 && index == 2 && reg == R_EDX) { 516 uint32_t edx; 517 host_cpuid(7, 2, &unused, &unused, &unused, &edx); 518 ret |= edx & CPUID_7_2_EDX_MCDT_NO; 519 } else if (function == 0xd && index == 0 && 520 (reg == R_EAX || reg == R_EDX)) { 521 /* 522 * The value returned by KVM_GET_SUPPORTED_CPUID does not include 523 * features that still have to be enabled with the arch_prctl 524 * system call. QEMU needs the full value, which is retrieved 525 * with KVM_GET_DEVICE_ATTR. 526 */ 527 struct kvm_device_attr attr = { 528 .group = 0, 529 .attr = KVM_X86_XCOMP_GUEST_SUPP, 530 .addr = (unsigned long) &bitmask 531 }; 532 533 bool sys_attr = kvm_check_extension(s, KVM_CAP_SYS_ATTRIBUTES); 534 if (!sys_attr) { 535 return ret; 536 } 537 538 int rc = kvm_ioctl(s, KVM_GET_DEVICE_ATTR, &attr); 539 if (rc < 0) { 540 if (rc != -ENXIO) { 541 warn_report("KVM_GET_DEVICE_ATTR(0, KVM_X86_XCOMP_GUEST_SUPP) " 542 "error: %d", rc); 543 } 544 return ret; 545 } 546 ret = (reg == R_EAX) ? bitmask : bitmask >> 32; 547 } else if (function == 0x80000001 && reg == R_ECX) { 548 /* 549 * It's safe to enable TOPOEXT even if it's not returned by 550 * GET_SUPPORTED_CPUID. Unconditionally enabling TOPOEXT here allows 551 * us to keep CPU models including TOPOEXT runnable on older kernels. 552 */ 553 ret |= CPUID_EXT3_TOPOEXT; 554 } else if (function == 0x80000001 && reg == R_EDX) { 555 /* On Intel, kvm returns cpuid according to the Intel spec, 556 * so add missing bits according to the AMD spec: 557 */ 558 cpuid_1_edx = kvm_arch_get_supported_cpuid(s, 1, 0, R_EDX); 559 ret |= cpuid_1_edx & CPUID_EXT2_AMD_ALIASES; 560 } else if (function == 0x80000007 && reg == R_EBX) { 561 ret |= CPUID_8000_0007_EBX_OVERFLOW_RECOV | CPUID_8000_0007_EBX_SUCCOR; 562 } else if (function == KVM_CPUID_FEATURES && reg == R_EAX) { 563 /* kvm_pv_unhalt is reported by GET_SUPPORTED_CPUID, but it can't 564 * be enabled without the in-kernel irqchip 565 */ 566 if (!kvm_irqchip_in_kernel()) { 567 ret &= ~CPUID_KVM_PV_UNHALT; 568 } 569 if (kvm_irqchip_is_split()) { 570 ret |= CPUID_KVM_MSI_EXT_DEST_ID; 571 } 572 } else if (function == KVM_CPUID_FEATURES && reg == R_EDX) { 573 ret |= CPUID_KVM_HINTS_REALTIME; 574 } 575 576 if (current_machine->cgs) { 577 ret = x86_confidential_guest_adjust_cpuid_features( 578 X86_CONFIDENTIAL_GUEST(current_machine->cgs), 579 function, index, reg, ret); 580 } 581 return ret; 582 } 583 584 uint64_t kvm_arch_get_supported_msr_feature(KVMState *s, uint32_t index) 585 { 586 struct { 587 struct kvm_msrs info; 588 struct kvm_msr_entry entries[1]; 589 } msr_data = {}; 590 uint64_t value; 591 uint32_t ret, can_be_one, must_be_one; 592 593 if (kvm_feature_msrs == NULL) { /* Host doesn't support feature MSRs */ 594 return 0; 595 } 596 597 /* Check if requested MSR is supported feature MSR */ 598 int i; 599 for (i = 0; i < kvm_feature_msrs->nmsrs; i++) 600 if (kvm_feature_msrs->indices[i] == index) { 601 break; 602 } 603 if (i == kvm_feature_msrs->nmsrs) { 604 return 0; /* if the feature MSR is not supported, simply return 0 */ 605 } 606 607 msr_data.info.nmsrs = 1; 608 msr_data.entries[0].index = index; 609 610 ret = kvm_ioctl(s, KVM_GET_MSRS, &msr_data); 611 if (ret != 1) { 612 error_report("KVM get MSR (index=0x%x) feature failed, %s", 613 index, strerror(-ret)); 614 exit(1); 615 } 616 617 value = msr_data.entries[0].data; 618 switch (index) { 619 case MSR_IA32_VMX_PROCBASED_CTLS2: 620 if (!has_msr_vmx_procbased_ctls2) { 621 /* KVM forgot to add these bits for some time, do this ourselves. */ 622 if (kvm_arch_get_supported_cpuid(s, 0xD, 1, R_ECX) & 623 CPUID_XSAVE_XSAVES) { 624 value |= (uint64_t)VMX_SECONDARY_EXEC_XSAVES << 32; 625 } 626 if (kvm_arch_get_supported_cpuid(s, 1, 0, R_ECX) & 627 CPUID_EXT_RDRAND) { 628 value |= (uint64_t)VMX_SECONDARY_EXEC_RDRAND_EXITING << 32; 629 } 630 if (kvm_arch_get_supported_cpuid(s, 7, 0, R_EBX) & 631 CPUID_7_0_EBX_INVPCID) { 632 value |= (uint64_t)VMX_SECONDARY_EXEC_ENABLE_INVPCID << 32; 633 } 634 if (kvm_arch_get_supported_cpuid(s, 7, 0, R_EBX) & 635 CPUID_7_0_EBX_RDSEED) { 636 value |= (uint64_t)VMX_SECONDARY_EXEC_RDSEED_EXITING << 32; 637 } 638 if (kvm_arch_get_supported_cpuid(s, 0x80000001, 0, R_EDX) & 639 CPUID_EXT2_RDTSCP) { 640 value |= (uint64_t)VMX_SECONDARY_EXEC_RDTSCP << 32; 641 } 642 } 643 /* fall through */ 644 case MSR_IA32_VMX_TRUE_PINBASED_CTLS: 645 case MSR_IA32_VMX_TRUE_PROCBASED_CTLS: 646 case MSR_IA32_VMX_TRUE_ENTRY_CTLS: 647 case MSR_IA32_VMX_TRUE_EXIT_CTLS: 648 /* 649 * Return true for bits that can be one, but do not have to be one. 650 * The SDM tells us which bits could have a "must be one" setting, 651 * so we can do the opposite transformation in make_vmx_msr_value. 652 */ 653 must_be_one = (uint32_t)value; 654 can_be_one = (uint32_t)(value >> 32); 655 return can_be_one & ~must_be_one; 656 case MSR_IA32_ARCH_CAPABILITIES: 657 /* 658 * Special handling for fb-clear bit in ARCH_CAPABILITIES MSR. 659 * KVM will only report the bit if it is enabled in the host, 660 * but, for live migration capability purposes, we want to 661 * expose the bit to the guest even if it is disabled in the 662 * host, as long as the host itself is not vulnerable to 663 * the issue that the fb-clear bit is meant to mitigate. 664 */ 665 if ((value & MSR_ARCH_CAP_MDS_NO) && 666 (value & MSR_ARCH_CAP_TAA_NO) && 667 (value & MSR_ARCH_CAP_SBDR_SSDP_NO) && 668 (value & MSR_ARCH_CAP_FBSDP_NO) && 669 (value & MSR_ARCH_CAP_PSDP_NO)) { 670 value |= MSR_ARCH_CAP_FB_CLEAR; 671 } 672 return value; 673 674 default: 675 return value; 676 } 677 } 678 679 static int kvm_get_mce_cap_supported(KVMState *s, uint64_t *mce_cap, 680 int *max_banks) 681 { 682 *max_banks = kvm_check_extension(s, KVM_CAP_MCE); 683 return kvm_ioctl(s, KVM_X86_GET_MCE_CAP_SUPPORTED, mce_cap); 684 } 685 686 static void kvm_mce_inject(X86CPU *cpu, hwaddr paddr, int code) 687 { 688 CPUState *cs = CPU(cpu); 689 CPUX86State *env = &cpu->env; 690 uint64_t status = MCI_STATUS_VAL | MCI_STATUS_EN | MCI_STATUS_MISCV | 691 MCI_STATUS_ADDRV; 692 uint64_t mcg_status = MCG_STATUS_MCIP | MCG_STATUS_RIPV; 693 int flags = 0; 694 695 if (!IS_AMD_CPU(env)) { 696 status |= MCI_STATUS_S | MCI_STATUS_UC; 697 if (code == BUS_MCEERR_AR) { 698 status |= MCI_STATUS_AR | 0x134; 699 mcg_status |= MCG_STATUS_EIPV; 700 } else { 701 status |= 0xc0; 702 } 703 } else { 704 if (code == BUS_MCEERR_AR) { 705 status |= MCI_STATUS_UC | MCI_STATUS_POISON; 706 mcg_status |= MCG_STATUS_EIPV; 707 } else { 708 /* Setting the POISON bit for deferred errors indicates to the 709 * guest kernel that the address provided by the MCE is valid 710 * and usable which will ensure that the guest kernel will send 711 * a SIGBUS_AO signal to the guest process. This allows for 712 * more desirable behavior in the case that the guest process 713 * with poisoned memory has set the MCE_KILL_EARLY prctl flag 714 * which indicates that the process would prefer to handle or 715 * shutdown due to the poisoned memory condition before the 716 * memory has been accessed. 717 * 718 * While the POISON bit would not be set in a deferred error 719 * sent from hardware, the bit is not meaningful for deferred 720 * errors and can be reused in this scenario. 721 */ 722 status |= MCI_STATUS_DEFERRED | MCI_STATUS_POISON; 723 } 724 } 725 726 flags = cpu_x86_support_mca_broadcast(env) ? MCE_INJECT_BROADCAST : 0; 727 /* We need to read back the value of MSR_EXT_MCG_CTL that was set by the 728 * guest kernel back into env->mcg_ext_ctl. 729 */ 730 cpu_synchronize_state(cs); 731 if (env->mcg_ext_ctl & MCG_EXT_CTL_LMCE_EN) { 732 mcg_status |= MCG_STATUS_LMCE; 733 flags = 0; 734 } 735 736 cpu_x86_inject_mce(NULL, cpu, 9, status, mcg_status, paddr, 737 (MCM_ADDR_PHYS << 6) | 0xc, flags); 738 } 739 740 static void emit_hypervisor_memory_failure(MemoryFailureAction action, bool ar) 741 { 742 MemoryFailureFlags mff = {.action_required = ar, .recursive = false}; 743 744 qapi_event_send_memory_failure(MEMORY_FAILURE_RECIPIENT_HYPERVISOR, action, 745 &mff); 746 } 747 748 static void hardware_memory_error(void *host_addr) 749 { 750 emit_hypervisor_memory_failure(MEMORY_FAILURE_ACTION_FATAL, true); 751 error_report("QEMU got Hardware memory error at addr %p", host_addr); 752 exit(1); 753 } 754 755 void kvm_arch_on_sigbus_vcpu(CPUState *c, int code, void *addr) 756 { 757 X86CPU *cpu = X86_CPU(c); 758 CPUX86State *env = &cpu->env; 759 ram_addr_t ram_addr; 760 hwaddr paddr; 761 762 /* If we get an action required MCE, it has been injected by KVM 763 * while the VM was running. An action optional MCE instead should 764 * be coming from the main thread, which qemu_init_sigbus identifies 765 * as the "early kill" thread. 766 */ 767 assert(code == BUS_MCEERR_AR || code == BUS_MCEERR_AO); 768 769 if ((env->mcg_cap & MCG_SER_P) && addr) { 770 ram_addr = qemu_ram_addr_from_host(addr); 771 if (ram_addr != RAM_ADDR_INVALID && 772 kvm_physical_memory_addr_from_host(c->kvm_state, addr, &paddr)) { 773 kvm_hwpoison_page_add(ram_addr); 774 kvm_mce_inject(cpu, paddr, code); 775 776 /* 777 * Use different logging severity based on error type. 778 * If there is additional MCE reporting on the hypervisor, QEMU VA 779 * could be another source to identify the PA and MCE details. 780 */ 781 if (code == BUS_MCEERR_AR) { 782 error_report("Guest MCE Memory Error at QEMU addr %p and " 783 "GUEST addr 0x%" HWADDR_PRIx " of type %s injected", 784 addr, paddr, "BUS_MCEERR_AR"); 785 } else { 786 warn_report("Guest MCE Memory Error at QEMU addr %p and " 787 "GUEST addr 0x%" HWADDR_PRIx " of type %s injected", 788 addr, paddr, "BUS_MCEERR_AO"); 789 } 790 791 return; 792 } 793 794 if (code == BUS_MCEERR_AO) { 795 warn_report("Hardware memory error at addr %p of type %s " 796 "for memory used by QEMU itself instead of guest system!", 797 addr, "BUS_MCEERR_AO"); 798 } 799 } 800 801 if (code == BUS_MCEERR_AR) { 802 hardware_memory_error(addr); 803 } 804 805 /* Hope we are lucky for AO MCE, just notify a event */ 806 emit_hypervisor_memory_failure(MEMORY_FAILURE_ACTION_IGNORE, false); 807 } 808 809 static void kvm_queue_exception(CPUX86State *env, 810 int32_t exception_nr, 811 uint8_t exception_has_payload, 812 uint64_t exception_payload) 813 { 814 assert(env->exception_nr == -1); 815 assert(!env->exception_pending); 816 assert(!env->exception_injected); 817 assert(!env->exception_has_payload); 818 819 env->exception_nr = exception_nr; 820 821 if (has_exception_payload) { 822 env->exception_pending = 1; 823 824 env->exception_has_payload = exception_has_payload; 825 env->exception_payload = exception_payload; 826 } else { 827 env->exception_injected = 1; 828 829 if (exception_nr == EXCP01_DB) { 830 assert(exception_has_payload); 831 env->dr[6] = exception_payload; 832 } else if (exception_nr == EXCP0E_PAGE) { 833 assert(exception_has_payload); 834 env->cr[2] = exception_payload; 835 } else { 836 assert(!exception_has_payload); 837 } 838 } 839 } 840 841 static void cpu_update_state(void *opaque, bool running, RunState state) 842 { 843 CPUX86State *env = opaque; 844 845 if (running) { 846 env->tsc_valid = false; 847 } 848 } 849 850 unsigned long kvm_arch_vcpu_id(CPUState *cs) 851 { 852 X86CPU *cpu = X86_CPU(cs); 853 return cpu->apic_id; 854 } 855 856 #ifndef KVM_CPUID_SIGNATURE_NEXT 857 #define KVM_CPUID_SIGNATURE_NEXT 0x40000100 858 #endif 859 860 static bool hyperv_enabled(X86CPU *cpu) 861 { 862 return kvm_check_extension(kvm_state, KVM_CAP_HYPERV) > 0 && 863 ((cpu->hyperv_spinlock_attempts != HYPERV_SPINLOCK_NEVER_NOTIFY) || 864 cpu->hyperv_features || cpu->hyperv_passthrough); 865 } 866 867 /* 868 * Check whether target_freq is within conservative 869 * ntp correctable bounds (250ppm) of freq 870 */ 871 static inline bool freq_within_bounds(int freq, int target_freq) 872 { 873 int max_freq = freq + (freq * 250 / 1000000); 874 int min_freq = freq - (freq * 250 / 1000000); 875 876 if (target_freq >= min_freq && target_freq <= max_freq) { 877 return true; 878 } 879 880 return false; 881 } 882 883 static int kvm_arch_set_tsc_khz(CPUState *cs) 884 { 885 X86CPU *cpu = X86_CPU(cs); 886 CPUX86State *env = &cpu->env; 887 int r, cur_freq; 888 bool set_ioctl = false; 889 890 /* 891 * TSC of TD vcpu is immutable, it cannot be set/changed via vcpu scope 892 * VM_SET_TSC_KHZ, but only be initialized via VM scope VM_SET_TSC_KHZ 893 * before ioctl KVM_TDX_INIT_VM in tdx_pre_create_vcpu() 894 */ 895 if (is_tdx_vm()) { 896 return 0; 897 } 898 899 if (!env->tsc_khz) { 900 return 0; 901 } 902 903 cur_freq = kvm_check_extension(cs->kvm_state, KVM_CAP_GET_TSC_KHZ) ? 904 kvm_vcpu_ioctl(cs, KVM_GET_TSC_KHZ) : -ENOTSUP; 905 906 /* 907 * If TSC scaling is supported, attempt to set TSC frequency. 908 */ 909 if (kvm_check_extension(cs->kvm_state, KVM_CAP_TSC_CONTROL)) { 910 set_ioctl = true; 911 } 912 913 /* 914 * If desired TSC frequency is within bounds of NTP correction, 915 * attempt to set TSC frequency. 916 */ 917 if (cur_freq != -ENOTSUP && freq_within_bounds(cur_freq, env->tsc_khz)) { 918 set_ioctl = true; 919 } 920 921 r = set_ioctl ? 922 kvm_vcpu_ioctl(cs, KVM_SET_TSC_KHZ, env->tsc_khz) : 923 -ENOTSUP; 924 925 if (r < 0) { 926 /* When KVM_SET_TSC_KHZ fails, it's an error only if the current 927 * TSC frequency doesn't match the one we want. 928 */ 929 cur_freq = kvm_check_extension(cs->kvm_state, KVM_CAP_GET_TSC_KHZ) ? 930 kvm_vcpu_ioctl(cs, KVM_GET_TSC_KHZ) : 931 -ENOTSUP; 932 if (cur_freq <= 0 || cur_freq != env->tsc_khz) { 933 warn_report("TSC frequency mismatch between " 934 "VM (%" PRId64 " kHz) and host (%d kHz), " 935 "and TSC scaling unavailable", 936 env->tsc_khz, cur_freq); 937 return r; 938 } 939 } 940 941 return 0; 942 } 943 944 static bool tsc_is_stable_and_known(CPUX86State *env) 945 { 946 if (!env->tsc_khz) { 947 return false; 948 } 949 return (env->features[FEAT_8000_0007_EDX] & CPUID_APM_INVTSC) 950 || env->user_tsc_khz; 951 } 952 953 #define DEFAULT_EVMCS_VERSION ((1 << 8) | 1) 954 955 static struct { 956 const char *desc; 957 struct { 958 uint32_t func; 959 int reg; 960 uint32_t bits; 961 } flags[2]; 962 uint64_t dependencies; 963 bool skip_passthrough; 964 } kvm_hyperv_properties[] = { 965 [HYPERV_FEAT_RELAXED] = { 966 .desc = "relaxed timing (hv-relaxed)", 967 .flags = { 968 {.func = HV_CPUID_ENLIGHTMENT_INFO, .reg = R_EAX, 969 .bits = HV_RELAXED_TIMING_RECOMMENDED} 970 } 971 }, 972 [HYPERV_FEAT_VAPIC] = { 973 .desc = "virtual APIC (hv-vapic)", 974 .flags = { 975 {.func = HV_CPUID_FEATURES, .reg = R_EAX, 976 .bits = HV_APIC_ACCESS_AVAILABLE} 977 } 978 }, 979 [HYPERV_FEAT_TIME] = { 980 .desc = "clocksources (hv-time)", 981 .flags = { 982 {.func = HV_CPUID_FEATURES, .reg = R_EAX, 983 .bits = HV_TIME_REF_COUNT_AVAILABLE | HV_REFERENCE_TSC_AVAILABLE} 984 } 985 }, 986 [HYPERV_FEAT_CRASH] = { 987 .desc = "crash MSRs (hv-crash)", 988 .flags = { 989 {.func = HV_CPUID_FEATURES, .reg = R_EDX, 990 .bits = HV_GUEST_CRASH_MSR_AVAILABLE} 991 } 992 }, 993 [HYPERV_FEAT_RESET] = { 994 .desc = "reset MSR (hv-reset)", 995 .flags = { 996 {.func = HV_CPUID_FEATURES, .reg = R_EAX, 997 .bits = HV_RESET_AVAILABLE} 998 } 999 }, 1000 [HYPERV_FEAT_VPINDEX] = { 1001 .desc = "VP_INDEX MSR (hv-vpindex)", 1002 .flags = { 1003 {.func = HV_CPUID_FEATURES, .reg = R_EAX, 1004 .bits = HV_VP_INDEX_AVAILABLE} 1005 } 1006 }, 1007 [HYPERV_FEAT_RUNTIME] = { 1008 .desc = "VP_RUNTIME MSR (hv-runtime)", 1009 .flags = { 1010 {.func = HV_CPUID_FEATURES, .reg = R_EAX, 1011 .bits = HV_VP_RUNTIME_AVAILABLE} 1012 } 1013 }, 1014 [HYPERV_FEAT_SYNIC] = { 1015 .desc = "synthetic interrupt controller (hv-synic)", 1016 .flags = { 1017 {.func = HV_CPUID_FEATURES, .reg = R_EAX, 1018 .bits = HV_SYNIC_AVAILABLE} 1019 } 1020 }, 1021 [HYPERV_FEAT_STIMER] = { 1022 .desc = "synthetic timers (hv-stimer)", 1023 .flags = { 1024 {.func = HV_CPUID_FEATURES, .reg = R_EAX, 1025 .bits = HV_SYNTIMERS_AVAILABLE} 1026 }, 1027 .dependencies = BIT(HYPERV_FEAT_SYNIC) | BIT(HYPERV_FEAT_TIME) 1028 }, 1029 [HYPERV_FEAT_FREQUENCIES] = { 1030 .desc = "frequency MSRs (hv-frequencies)", 1031 .flags = { 1032 {.func = HV_CPUID_FEATURES, .reg = R_EAX, 1033 .bits = HV_ACCESS_FREQUENCY_MSRS}, 1034 {.func = HV_CPUID_FEATURES, .reg = R_EDX, 1035 .bits = HV_FREQUENCY_MSRS_AVAILABLE} 1036 } 1037 }, 1038 [HYPERV_FEAT_REENLIGHTENMENT] = { 1039 .desc = "reenlightenment MSRs (hv-reenlightenment)", 1040 .flags = { 1041 {.func = HV_CPUID_FEATURES, .reg = R_EAX, 1042 .bits = HV_ACCESS_REENLIGHTENMENTS_CONTROL} 1043 } 1044 }, 1045 [HYPERV_FEAT_TLBFLUSH] = { 1046 .desc = "paravirtualized TLB flush (hv-tlbflush)", 1047 .flags = { 1048 {.func = HV_CPUID_ENLIGHTMENT_INFO, .reg = R_EAX, 1049 .bits = HV_REMOTE_TLB_FLUSH_RECOMMENDED | 1050 HV_EX_PROCESSOR_MASKS_RECOMMENDED} 1051 }, 1052 .dependencies = BIT(HYPERV_FEAT_VPINDEX) 1053 }, 1054 [HYPERV_FEAT_EVMCS] = { 1055 .desc = "enlightened VMCS (hv-evmcs)", 1056 .flags = { 1057 {.func = HV_CPUID_ENLIGHTMENT_INFO, .reg = R_EAX, 1058 .bits = HV_ENLIGHTENED_VMCS_RECOMMENDED} 1059 }, 1060 .dependencies = BIT(HYPERV_FEAT_VAPIC) 1061 }, 1062 [HYPERV_FEAT_IPI] = { 1063 .desc = "paravirtualized IPI (hv-ipi)", 1064 .flags = { 1065 {.func = HV_CPUID_ENLIGHTMENT_INFO, .reg = R_EAX, 1066 .bits = HV_CLUSTER_IPI_RECOMMENDED | 1067 HV_EX_PROCESSOR_MASKS_RECOMMENDED} 1068 }, 1069 .dependencies = BIT(HYPERV_FEAT_VPINDEX) 1070 }, 1071 [HYPERV_FEAT_STIMER_DIRECT] = { 1072 .desc = "direct mode synthetic timers (hv-stimer-direct)", 1073 .flags = { 1074 {.func = HV_CPUID_FEATURES, .reg = R_EDX, 1075 .bits = HV_STIMER_DIRECT_MODE_AVAILABLE} 1076 }, 1077 .dependencies = BIT(HYPERV_FEAT_STIMER) 1078 }, 1079 [HYPERV_FEAT_AVIC] = { 1080 .desc = "AVIC/APICv support (hv-avic/hv-apicv)", 1081 .flags = { 1082 {.func = HV_CPUID_ENLIGHTMENT_INFO, .reg = R_EAX, 1083 .bits = HV_DEPRECATING_AEOI_RECOMMENDED} 1084 } 1085 }, 1086 [HYPERV_FEAT_SYNDBG] = { 1087 .desc = "Enable synthetic kernel debugger channel (hv-syndbg)", 1088 .flags = { 1089 {.func = HV_CPUID_FEATURES, .reg = R_EDX, 1090 .bits = HV_FEATURE_DEBUG_MSRS_AVAILABLE} 1091 }, 1092 .dependencies = BIT(HYPERV_FEAT_SYNIC) | BIT(HYPERV_FEAT_RELAXED), 1093 .skip_passthrough = true, 1094 }, 1095 [HYPERV_FEAT_MSR_BITMAP] = { 1096 .desc = "enlightened MSR-Bitmap (hv-emsr-bitmap)", 1097 .flags = { 1098 {.func = HV_CPUID_NESTED_FEATURES, .reg = R_EAX, 1099 .bits = HV_NESTED_MSR_BITMAP} 1100 } 1101 }, 1102 [HYPERV_FEAT_XMM_INPUT] = { 1103 .desc = "XMM fast hypercall input (hv-xmm-input)", 1104 .flags = { 1105 {.func = HV_CPUID_FEATURES, .reg = R_EDX, 1106 .bits = HV_HYPERCALL_XMM_INPUT_AVAILABLE} 1107 } 1108 }, 1109 [HYPERV_FEAT_TLBFLUSH_EXT] = { 1110 .desc = "Extended gva ranges for TLB flush hypercalls (hv-tlbflush-ext)", 1111 .flags = { 1112 {.func = HV_CPUID_FEATURES, .reg = R_EDX, 1113 .bits = HV_EXT_GVA_RANGES_FLUSH_AVAILABLE} 1114 }, 1115 .dependencies = BIT(HYPERV_FEAT_TLBFLUSH) 1116 }, 1117 [HYPERV_FEAT_TLBFLUSH_DIRECT] = { 1118 .desc = "direct TLB flush (hv-tlbflush-direct)", 1119 .flags = { 1120 {.func = HV_CPUID_NESTED_FEATURES, .reg = R_EAX, 1121 .bits = HV_NESTED_DIRECT_FLUSH} 1122 }, 1123 .dependencies = BIT(HYPERV_FEAT_VAPIC) 1124 }, 1125 }; 1126 1127 static struct kvm_cpuid2 *try_get_hv_cpuid(CPUState *cs, int max, 1128 bool do_sys_ioctl) 1129 { 1130 struct kvm_cpuid2 *cpuid; 1131 int r, size; 1132 1133 size = sizeof(*cpuid) + max * sizeof(*cpuid->entries); 1134 cpuid = g_malloc0(size); 1135 cpuid->nent = max; 1136 1137 if (do_sys_ioctl) { 1138 r = kvm_ioctl(kvm_state, KVM_GET_SUPPORTED_HV_CPUID, cpuid); 1139 } else { 1140 r = kvm_vcpu_ioctl(cs, KVM_GET_SUPPORTED_HV_CPUID, cpuid); 1141 } 1142 if (r == 0 && cpuid->nent >= max) { 1143 r = -E2BIG; 1144 } 1145 if (r < 0) { 1146 if (r == -E2BIG) { 1147 g_free(cpuid); 1148 return NULL; 1149 } else { 1150 fprintf(stderr, "KVM_GET_SUPPORTED_HV_CPUID failed: %s\n", 1151 strerror(-r)); 1152 exit(1); 1153 } 1154 } 1155 return cpuid; 1156 } 1157 1158 /* 1159 * Run KVM_GET_SUPPORTED_HV_CPUID ioctl(), allocating a buffer large enough 1160 * for all entries. 1161 */ 1162 static struct kvm_cpuid2 *get_supported_hv_cpuid(CPUState *cs) 1163 { 1164 struct kvm_cpuid2 *cpuid; 1165 /* 0x40000000..0x40000005, 0x4000000A, 0x40000080..0x40000082 leaves */ 1166 int max = 11; 1167 int i; 1168 bool do_sys_ioctl; 1169 1170 do_sys_ioctl = 1171 kvm_check_extension(kvm_state, KVM_CAP_SYS_HYPERV_CPUID) > 0; 1172 1173 /* 1174 * Non-empty KVM context is needed when KVM_CAP_SYS_HYPERV_CPUID is 1175 * unsupported, kvm_hyperv_expand_features() checks for that. 1176 */ 1177 assert(do_sys_ioctl || cs->kvm_state); 1178 1179 /* 1180 * When the buffer is too small, KVM_GET_SUPPORTED_HV_CPUID fails with 1181 * -E2BIG, however, it doesn't report back the right size. Keep increasing 1182 * it and re-trying until we succeed. 1183 */ 1184 while ((cpuid = try_get_hv_cpuid(cs, max, do_sys_ioctl)) == NULL) { 1185 max++; 1186 } 1187 1188 /* 1189 * KVM_GET_SUPPORTED_HV_CPUID does not set EVMCS CPUID bit before 1190 * KVM_CAP_HYPERV_ENLIGHTENED_VMCS is enabled but we want to get the 1191 * information early, just check for the capability and set the bit 1192 * manually. 1193 */ 1194 if (!do_sys_ioctl && kvm_check_extension(cs->kvm_state, 1195 KVM_CAP_HYPERV_ENLIGHTENED_VMCS) > 0) { 1196 for (i = 0; i < cpuid->nent; i++) { 1197 if (cpuid->entries[i].function == HV_CPUID_ENLIGHTMENT_INFO) { 1198 cpuid->entries[i].eax |= HV_ENLIGHTENED_VMCS_RECOMMENDED; 1199 } 1200 } 1201 } 1202 1203 return cpuid; 1204 } 1205 1206 /* 1207 * When KVM_GET_SUPPORTED_HV_CPUID is not supported we fill CPUID feature 1208 * leaves from KVM_CAP_HYPERV* and present MSRs data. 1209 */ 1210 static struct kvm_cpuid2 *get_supported_hv_cpuid_legacy(CPUState *cs) 1211 { 1212 X86CPU *cpu = X86_CPU(cs); 1213 struct kvm_cpuid2 *cpuid; 1214 struct kvm_cpuid_entry2 *entry_feat, *entry_recomm; 1215 1216 /* HV_CPUID_FEATURES, HV_CPUID_ENLIGHTMENT_INFO */ 1217 cpuid = g_malloc0(sizeof(*cpuid) + 2 * sizeof(*cpuid->entries)); 1218 cpuid->nent = 2; 1219 1220 /* HV_CPUID_VENDOR_AND_MAX_FUNCTIONS */ 1221 entry_feat = &cpuid->entries[0]; 1222 entry_feat->function = HV_CPUID_FEATURES; 1223 1224 entry_recomm = &cpuid->entries[1]; 1225 entry_recomm->function = HV_CPUID_ENLIGHTMENT_INFO; 1226 entry_recomm->ebx = cpu->hyperv_spinlock_attempts; 1227 1228 if (kvm_check_extension(cs->kvm_state, KVM_CAP_HYPERV) > 0) { 1229 entry_feat->eax |= HV_HYPERCALL_AVAILABLE; 1230 entry_feat->eax |= HV_APIC_ACCESS_AVAILABLE; 1231 entry_feat->edx |= HV_CPU_DYNAMIC_PARTITIONING_AVAILABLE; 1232 entry_recomm->eax |= HV_RELAXED_TIMING_RECOMMENDED; 1233 entry_recomm->eax |= HV_APIC_ACCESS_RECOMMENDED; 1234 } 1235 1236 if (kvm_check_extension(cs->kvm_state, KVM_CAP_HYPERV_TIME) > 0) { 1237 entry_feat->eax |= HV_TIME_REF_COUNT_AVAILABLE; 1238 entry_feat->eax |= HV_REFERENCE_TSC_AVAILABLE; 1239 } 1240 1241 if (has_msr_hv_frequencies) { 1242 entry_feat->eax |= HV_ACCESS_FREQUENCY_MSRS; 1243 entry_feat->edx |= HV_FREQUENCY_MSRS_AVAILABLE; 1244 } 1245 1246 if (has_msr_hv_crash) { 1247 entry_feat->edx |= HV_GUEST_CRASH_MSR_AVAILABLE; 1248 } 1249 1250 if (has_msr_hv_reenlightenment) { 1251 entry_feat->eax |= HV_ACCESS_REENLIGHTENMENTS_CONTROL; 1252 } 1253 1254 if (has_msr_hv_reset) { 1255 entry_feat->eax |= HV_RESET_AVAILABLE; 1256 } 1257 1258 if (has_msr_hv_vpindex) { 1259 entry_feat->eax |= HV_VP_INDEX_AVAILABLE; 1260 } 1261 1262 if (has_msr_hv_runtime) { 1263 entry_feat->eax |= HV_VP_RUNTIME_AVAILABLE; 1264 } 1265 1266 if (has_msr_hv_synic) { 1267 unsigned int cap = cpu->hyperv_synic_kvm_only ? 1268 KVM_CAP_HYPERV_SYNIC : KVM_CAP_HYPERV_SYNIC2; 1269 1270 if (kvm_check_extension(cs->kvm_state, cap) > 0) { 1271 entry_feat->eax |= HV_SYNIC_AVAILABLE; 1272 } 1273 } 1274 1275 if (has_msr_hv_stimer) { 1276 entry_feat->eax |= HV_SYNTIMERS_AVAILABLE; 1277 } 1278 1279 if (has_msr_hv_syndbg_options) { 1280 entry_feat->edx |= HV_GUEST_DEBUGGING_AVAILABLE; 1281 entry_feat->edx |= HV_FEATURE_DEBUG_MSRS_AVAILABLE; 1282 entry_feat->ebx |= HV_PARTITION_DEBUGGING_ALLOWED; 1283 } 1284 1285 if (kvm_check_extension(cs->kvm_state, 1286 KVM_CAP_HYPERV_TLBFLUSH) > 0) { 1287 entry_recomm->eax |= HV_REMOTE_TLB_FLUSH_RECOMMENDED; 1288 entry_recomm->eax |= HV_EX_PROCESSOR_MASKS_RECOMMENDED; 1289 } 1290 1291 if (kvm_check_extension(cs->kvm_state, 1292 KVM_CAP_HYPERV_ENLIGHTENED_VMCS) > 0) { 1293 entry_recomm->eax |= HV_ENLIGHTENED_VMCS_RECOMMENDED; 1294 } 1295 1296 if (kvm_check_extension(cs->kvm_state, 1297 KVM_CAP_HYPERV_SEND_IPI) > 0) { 1298 entry_recomm->eax |= HV_CLUSTER_IPI_RECOMMENDED; 1299 entry_recomm->eax |= HV_EX_PROCESSOR_MASKS_RECOMMENDED; 1300 } 1301 1302 return cpuid; 1303 } 1304 1305 static uint32_t hv_cpuid_get_host(CPUState *cs, uint32_t func, int reg) 1306 { 1307 struct kvm_cpuid_entry2 *entry; 1308 struct kvm_cpuid2 *cpuid; 1309 1310 if (hv_cpuid_cache) { 1311 cpuid = hv_cpuid_cache; 1312 } else { 1313 if (kvm_check_extension(kvm_state, KVM_CAP_HYPERV_CPUID) > 0) { 1314 cpuid = get_supported_hv_cpuid(cs); 1315 } else { 1316 /* 1317 * 'cs->kvm_state' may be NULL when Hyper-V features are expanded 1318 * before KVM context is created but this is only done when 1319 * KVM_CAP_SYS_HYPERV_CPUID is supported and it implies 1320 * KVM_CAP_HYPERV_CPUID. 1321 */ 1322 assert(cs->kvm_state); 1323 1324 cpuid = get_supported_hv_cpuid_legacy(cs); 1325 } 1326 hv_cpuid_cache = cpuid; 1327 } 1328 1329 if (!cpuid) { 1330 return 0; 1331 } 1332 1333 entry = cpuid_find_entry(cpuid, func, 0); 1334 if (!entry) { 1335 return 0; 1336 } 1337 1338 return cpuid_entry_get_reg(entry, reg); 1339 } 1340 1341 static bool hyperv_feature_supported(CPUState *cs, int feature) 1342 { 1343 uint32_t func, bits; 1344 int i, reg; 1345 1346 /* 1347 * kvm_hyperv_properties needs to define at least one CPUID flag which 1348 * must be used to detect the feature, it's hard to say whether it is 1349 * supported or not otherwise. 1350 */ 1351 assert(kvm_hyperv_properties[feature].flags[0].func); 1352 1353 for (i = 0; i < ARRAY_SIZE(kvm_hyperv_properties[feature].flags); i++) { 1354 1355 func = kvm_hyperv_properties[feature].flags[i].func; 1356 reg = kvm_hyperv_properties[feature].flags[i].reg; 1357 bits = kvm_hyperv_properties[feature].flags[i].bits; 1358 1359 if (!func) { 1360 continue; 1361 } 1362 1363 if ((hv_cpuid_get_host(cs, func, reg) & bits) != bits) { 1364 return false; 1365 } 1366 } 1367 1368 return true; 1369 } 1370 1371 /* Checks that all feature dependencies are enabled */ 1372 static bool hv_feature_check_deps(X86CPU *cpu, int feature, Error **errp) 1373 { 1374 uint64_t deps; 1375 int dep_feat; 1376 1377 deps = kvm_hyperv_properties[feature].dependencies; 1378 while (deps) { 1379 dep_feat = ctz64(deps); 1380 if (!(hyperv_feat_enabled(cpu, dep_feat))) { 1381 error_setg(errp, "Hyper-V %s requires Hyper-V %s", 1382 kvm_hyperv_properties[feature].desc, 1383 kvm_hyperv_properties[dep_feat].desc); 1384 return false; 1385 } 1386 deps &= ~(1ull << dep_feat); 1387 } 1388 1389 return true; 1390 } 1391 1392 static uint32_t hv_build_cpuid_leaf(CPUState *cs, uint32_t func, int reg) 1393 { 1394 X86CPU *cpu = X86_CPU(cs); 1395 uint32_t r = 0; 1396 int i, j; 1397 1398 for (i = 0; i < ARRAY_SIZE(kvm_hyperv_properties); i++) { 1399 if (!hyperv_feat_enabled(cpu, i)) { 1400 continue; 1401 } 1402 1403 for (j = 0; j < ARRAY_SIZE(kvm_hyperv_properties[i].flags); j++) { 1404 if (kvm_hyperv_properties[i].flags[j].func != func) { 1405 continue; 1406 } 1407 if (kvm_hyperv_properties[i].flags[j].reg != reg) { 1408 continue; 1409 } 1410 1411 r |= kvm_hyperv_properties[i].flags[j].bits; 1412 } 1413 } 1414 1415 /* HV_CPUID_NESTED_FEATURES.EAX also encodes the supported eVMCS range */ 1416 if (func == HV_CPUID_NESTED_FEATURES && reg == R_EAX) { 1417 if (hyperv_feat_enabled(cpu, HYPERV_FEAT_EVMCS)) { 1418 r |= DEFAULT_EVMCS_VERSION; 1419 } 1420 } 1421 1422 return r; 1423 } 1424 1425 /* 1426 * Expand Hyper-V CPU features. In partucular, check that all the requested 1427 * features are supported by the host and the sanity of the configuration 1428 * (that all the required dependencies are included). Also, this takes care 1429 * of 'hv_passthrough' mode and fills the environment with all supported 1430 * Hyper-V features. 1431 */ 1432 bool kvm_hyperv_expand_features(X86CPU *cpu, Error **errp) 1433 { 1434 CPUState *cs = CPU(cpu); 1435 Error *local_err = NULL; 1436 int feat; 1437 1438 if (!hyperv_enabled(cpu)) 1439 return true; 1440 1441 /* 1442 * When kvm_hyperv_expand_features is called at CPU feature expansion 1443 * time per-CPU kvm_state is not available yet so we can only proceed 1444 * when KVM_CAP_SYS_HYPERV_CPUID is supported. 1445 */ 1446 if (!cs->kvm_state && 1447 !kvm_check_extension(kvm_state, KVM_CAP_SYS_HYPERV_CPUID)) 1448 return true; 1449 1450 if (cpu->hyperv_passthrough) { 1451 cpu->hyperv_vendor_id[0] = 1452 hv_cpuid_get_host(cs, HV_CPUID_VENDOR_AND_MAX_FUNCTIONS, R_EBX); 1453 cpu->hyperv_vendor_id[1] = 1454 hv_cpuid_get_host(cs, HV_CPUID_VENDOR_AND_MAX_FUNCTIONS, R_ECX); 1455 cpu->hyperv_vendor_id[2] = 1456 hv_cpuid_get_host(cs, HV_CPUID_VENDOR_AND_MAX_FUNCTIONS, R_EDX); 1457 cpu->hyperv_vendor = g_realloc(cpu->hyperv_vendor, 1458 sizeof(cpu->hyperv_vendor_id) + 1); 1459 memcpy(cpu->hyperv_vendor, cpu->hyperv_vendor_id, 1460 sizeof(cpu->hyperv_vendor_id)); 1461 cpu->hyperv_vendor[sizeof(cpu->hyperv_vendor_id)] = 0; 1462 1463 cpu->hyperv_interface_id[0] = 1464 hv_cpuid_get_host(cs, HV_CPUID_INTERFACE, R_EAX); 1465 cpu->hyperv_interface_id[1] = 1466 hv_cpuid_get_host(cs, HV_CPUID_INTERFACE, R_EBX); 1467 cpu->hyperv_interface_id[2] = 1468 hv_cpuid_get_host(cs, HV_CPUID_INTERFACE, R_ECX); 1469 cpu->hyperv_interface_id[3] = 1470 hv_cpuid_get_host(cs, HV_CPUID_INTERFACE, R_EDX); 1471 1472 cpu->hyperv_ver_id_build = 1473 hv_cpuid_get_host(cs, HV_CPUID_VERSION, R_EAX); 1474 cpu->hyperv_ver_id_major = 1475 hv_cpuid_get_host(cs, HV_CPUID_VERSION, R_EBX) >> 16; 1476 cpu->hyperv_ver_id_minor = 1477 hv_cpuid_get_host(cs, HV_CPUID_VERSION, R_EBX) & 0xffff; 1478 cpu->hyperv_ver_id_sp = 1479 hv_cpuid_get_host(cs, HV_CPUID_VERSION, R_ECX); 1480 cpu->hyperv_ver_id_sb = 1481 hv_cpuid_get_host(cs, HV_CPUID_VERSION, R_EDX) >> 24; 1482 cpu->hyperv_ver_id_sn = 1483 hv_cpuid_get_host(cs, HV_CPUID_VERSION, R_EDX) & 0xffffff; 1484 1485 cpu->hv_max_vps = hv_cpuid_get_host(cs, HV_CPUID_IMPLEMENT_LIMITS, 1486 R_EAX); 1487 cpu->hyperv_limits[0] = 1488 hv_cpuid_get_host(cs, HV_CPUID_IMPLEMENT_LIMITS, R_EBX); 1489 cpu->hyperv_limits[1] = 1490 hv_cpuid_get_host(cs, HV_CPUID_IMPLEMENT_LIMITS, R_ECX); 1491 cpu->hyperv_limits[2] = 1492 hv_cpuid_get_host(cs, HV_CPUID_IMPLEMENT_LIMITS, R_EDX); 1493 1494 cpu->hyperv_spinlock_attempts = 1495 hv_cpuid_get_host(cs, HV_CPUID_ENLIGHTMENT_INFO, R_EBX); 1496 1497 /* 1498 * Mark feature as enabled in 'cpu->hyperv_features' as 1499 * hv_build_cpuid_leaf() uses this info to build guest CPUIDs. 1500 */ 1501 for (feat = 0; feat < ARRAY_SIZE(kvm_hyperv_properties); feat++) { 1502 if (hyperv_feature_supported(cs, feat) && 1503 !kvm_hyperv_properties[feat].skip_passthrough) { 1504 cpu->hyperv_features |= BIT(feat); 1505 } 1506 } 1507 } else { 1508 /* Check features availability and dependencies */ 1509 for (feat = 0; feat < ARRAY_SIZE(kvm_hyperv_properties); feat++) { 1510 /* If the feature was not requested skip it. */ 1511 if (!hyperv_feat_enabled(cpu, feat)) { 1512 continue; 1513 } 1514 1515 /* Check if the feature is supported by KVM */ 1516 if (!hyperv_feature_supported(cs, feat)) { 1517 error_setg(errp, "Hyper-V %s is not supported by kernel", 1518 kvm_hyperv_properties[feat].desc); 1519 return false; 1520 } 1521 1522 /* Check dependencies */ 1523 if (!hv_feature_check_deps(cpu, feat, &local_err)) { 1524 error_propagate(errp, local_err); 1525 return false; 1526 } 1527 } 1528 } 1529 1530 /* Additional dependencies not covered by kvm_hyperv_properties[] */ 1531 if (hyperv_feat_enabled(cpu, HYPERV_FEAT_SYNIC) && 1532 !cpu->hyperv_synic_kvm_only && 1533 !hyperv_feat_enabled(cpu, HYPERV_FEAT_VPINDEX)) { 1534 error_setg(errp, "Hyper-V %s requires Hyper-V %s", 1535 kvm_hyperv_properties[HYPERV_FEAT_SYNIC].desc, 1536 kvm_hyperv_properties[HYPERV_FEAT_VPINDEX].desc); 1537 return false; 1538 } 1539 1540 return true; 1541 } 1542 1543 /* 1544 * Fill in Hyper-V CPUIDs. Returns the number of entries filled in cpuid_ent. 1545 */ 1546 static int hyperv_fill_cpuids(CPUState *cs, 1547 struct kvm_cpuid_entry2 *cpuid_ent) 1548 { 1549 X86CPU *cpu = X86_CPU(cs); 1550 struct kvm_cpuid_entry2 *c; 1551 uint32_t signature[3]; 1552 uint32_t cpuid_i = 0, max_cpuid_leaf = 0; 1553 uint32_t nested_eax = 1554 hv_build_cpuid_leaf(cs, HV_CPUID_NESTED_FEATURES, R_EAX); 1555 1556 max_cpuid_leaf = nested_eax ? HV_CPUID_NESTED_FEATURES : 1557 HV_CPUID_IMPLEMENT_LIMITS; 1558 1559 if (hyperv_feat_enabled(cpu, HYPERV_FEAT_SYNDBG)) { 1560 max_cpuid_leaf = 1561 MAX(max_cpuid_leaf, HV_CPUID_SYNDBG_PLATFORM_CAPABILITIES); 1562 } 1563 1564 c = &cpuid_ent[cpuid_i++]; 1565 c->function = HV_CPUID_VENDOR_AND_MAX_FUNCTIONS; 1566 c->eax = max_cpuid_leaf; 1567 c->ebx = cpu->hyperv_vendor_id[0]; 1568 c->ecx = cpu->hyperv_vendor_id[1]; 1569 c->edx = cpu->hyperv_vendor_id[2]; 1570 1571 c = &cpuid_ent[cpuid_i++]; 1572 c->function = HV_CPUID_INTERFACE; 1573 c->eax = cpu->hyperv_interface_id[0]; 1574 c->ebx = cpu->hyperv_interface_id[1]; 1575 c->ecx = cpu->hyperv_interface_id[2]; 1576 c->edx = cpu->hyperv_interface_id[3]; 1577 1578 c = &cpuid_ent[cpuid_i++]; 1579 c->function = HV_CPUID_VERSION; 1580 c->eax = cpu->hyperv_ver_id_build; 1581 c->ebx = (uint32_t)cpu->hyperv_ver_id_major << 16 | 1582 cpu->hyperv_ver_id_minor; 1583 c->ecx = cpu->hyperv_ver_id_sp; 1584 c->edx = (uint32_t)cpu->hyperv_ver_id_sb << 24 | 1585 (cpu->hyperv_ver_id_sn & 0xffffff); 1586 1587 c = &cpuid_ent[cpuid_i++]; 1588 c->function = HV_CPUID_FEATURES; 1589 c->eax = hv_build_cpuid_leaf(cs, HV_CPUID_FEATURES, R_EAX); 1590 c->ebx = hv_build_cpuid_leaf(cs, HV_CPUID_FEATURES, R_EBX); 1591 c->edx = hv_build_cpuid_leaf(cs, HV_CPUID_FEATURES, R_EDX); 1592 1593 /* Unconditionally required with any Hyper-V enlightenment */ 1594 c->eax |= HV_HYPERCALL_AVAILABLE; 1595 1596 /* SynIC and Vmbus devices require messages/signals hypercalls */ 1597 if (hyperv_feat_enabled(cpu, HYPERV_FEAT_SYNIC) && 1598 !cpu->hyperv_synic_kvm_only) { 1599 c->ebx |= HV_POST_MESSAGES | HV_SIGNAL_EVENTS; 1600 } 1601 1602 1603 /* Not exposed by KVM but needed to make CPU hotplug in Windows work */ 1604 c->edx |= HV_CPU_DYNAMIC_PARTITIONING_AVAILABLE; 1605 1606 c = &cpuid_ent[cpuid_i++]; 1607 c->function = HV_CPUID_ENLIGHTMENT_INFO; 1608 c->eax = hv_build_cpuid_leaf(cs, HV_CPUID_ENLIGHTMENT_INFO, R_EAX); 1609 c->ebx = cpu->hyperv_spinlock_attempts; 1610 1611 if (hyperv_feat_enabled(cpu, HYPERV_FEAT_VAPIC) && 1612 !hyperv_feat_enabled(cpu, HYPERV_FEAT_AVIC)) { 1613 c->eax |= HV_APIC_ACCESS_RECOMMENDED; 1614 } 1615 1616 if (cpu->hyperv_no_nonarch_cs == ON_OFF_AUTO_ON) { 1617 c->eax |= HV_NO_NONARCH_CORESHARING; 1618 } else if (cpu->hyperv_no_nonarch_cs == ON_OFF_AUTO_AUTO) { 1619 c->eax |= hv_cpuid_get_host(cs, HV_CPUID_ENLIGHTMENT_INFO, R_EAX) & 1620 HV_NO_NONARCH_CORESHARING; 1621 } 1622 1623 c = &cpuid_ent[cpuid_i++]; 1624 c->function = HV_CPUID_IMPLEMENT_LIMITS; 1625 c->eax = cpu->hv_max_vps; 1626 c->ebx = cpu->hyperv_limits[0]; 1627 c->ecx = cpu->hyperv_limits[1]; 1628 c->edx = cpu->hyperv_limits[2]; 1629 1630 if (nested_eax) { 1631 uint32_t function; 1632 1633 /* Create zeroed 0x40000006..0x40000009 leaves */ 1634 for (function = HV_CPUID_IMPLEMENT_LIMITS + 1; 1635 function < HV_CPUID_NESTED_FEATURES; function++) { 1636 c = &cpuid_ent[cpuid_i++]; 1637 c->function = function; 1638 } 1639 1640 c = &cpuid_ent[cpuid_i++]; 1641 c->function = HV_CPUID_NESTED_FEATURES; 1642 c->eax = nested_eax; 1643 } 1644 1645 if (hyperv_feat_enabled(cpu, HYPERV_FEAT_SYNDBG)) { 1646 c = &cpuid_ent[cpuid_i++]; 1647 c->function = HV_CPUID_SYNDBG_VENDOR_AND_MAX_FUNCTIONS; 1648 c->eax = hyperv_feat_enabled(cpu, HYPERV_FEAT_EVMCS) ? 1649 HV_CPUID_NESTED_FEATURES : HV_CPUID_IMPLEMENT_LIMITS; 1650 memcpy(signature, "Microsoft VS", 12); 1651 c->eax = 0; 1652 c->ebx = signature[0]; 1653 c->ecx = signature[1]; 1654 c->edx = signature[2]; 1655 1656 c = &cpuid_ent[cpuid_i++]; 1657 c->function = HV_CPUID_SYNDBG_INTERFACE; 1658 memcpy(signature, "VS#1\0\0\0\0\0\0\0\0", 12); 1659 c->eax = signature[0]; 1660 c->ebx = 0; 1661 c->ecx = 0; 1662 c->edx = 0; 1663 1664 c = &cpuid_ent[cpuid_i++]; 1665 c->function = HV_CPUID_SYNDBG_PLATFORM_CAPABILITIES; 1666 c->eax = HV_SYNDBG_CAP_ALLOW_KERNEL_DEBUGGING; 1667 c->ebx = 0; 1668 c->ecx = 0; 1669 c->edx = 0; 1670 } 1671 1672 return cpuid_i; 1673 } 1674 1675 static Error *hv_passthrough_mig_blocker; 1676 static Error *hv_no_nonarch_cs_mig_blocker; 1677 1678 /* Checks that the exposed eVMCS version range is supported by KVM */ 1679 static bool evmcs_version_supported(uint16_t evmcs_version, 1680 uint16_t supported_evmcs_version) 1681 { 1682 uint8_t min_version = evmcs_version & 0xff; 1683 uint8_t max_version = evmcs_version >> 8; 1684 uint8_t min_supported_version = supported_evmcs_version & 0xff; 1685 uint8_t max_supported_version = supported_evmcs_version >> 8; 1686 1687 return (min_version >= min_supported_version) && 1688 (max_version <= max_supported_version); 1689 } 1690 1691 static int hyperv_init_vcpu(X86CPU *cpu) 1692 { 1693 CPUState *cs = CPU(cpu); 1694 Error *local_err = NULL; 1695 int ret; 1696 1697 if (cpu->hyperv_passthrough && hv_passthrough_mig_blocker == NULL) { 1698 error_setg(&hv_passthrough_mig_blocker, 1699 "'hv-passthrough' CPU flag prevents migration, use explicit" 1700 " set of hv-* flags instead"); 1701 ret = migrate_add_blocker(&hv_passthrough_mig_blocker, &local_err); 1702 if (ret < 0) { 1703 error_report_err(local_err); 1704 return ret; 1705 } 1706 } 1707 1708 if (cpu->hyperv_no_nonarch_cs == ON_OFF_AUTO_AUTO && 1709 hv_no_nonarch_cs_mig_blocker == NULL) { 1710 error_setg(&hv_no_nonarch_cs_mig_blocker, 1711 "'hv-no-nonarch-coresharing=auto' CPU flag prevents migration" 1712 " use explicit 'hv-no-nonarch-coresharing=on' instead (but" 1713 " make sure SMT is disabled and/or that vCPUs are properly" 1714 " pinned)"); 1715 ret = migrate_add_blocker(&hv_no_nonarch_cs_mig_blocker, &local_err); 1716 if (ret < 0) { 1717 error_report_err(local_err); 1718 return ret; 1719 } 1720 } 1721 1722 if (hyperv_feat_enabled(cpu, HYPERV_FEAT_VPINDEX) && !hv_vpindex_settable) { 1723 /* 1724 * the kernel doesn't support setting vp_index; assert that its value 1725 * is in sync 1726 */ 1727 uint64_t value; 1728 1729 ret = kvm_get_one_msr(cpu, HV_X64_MSR_VP_INDEX, &value); 1730 if (ret < 0) { 1731 return ret; 1732 } 1733 1734 if (value != hyperv_vp_index(CPU(cpu))) { 1735 error_report("kernel's vp_index != QEMU's vp_index"); 1736 return -ENXIO; 1737 } 1738 } 1739 1740 if (hyperv_feat_enabled(cpu, HYPERV_FEAT_SYNIC)) { 1741 uint32_t synic_cap = cpu->hyperv_synic_kvm_only ? 1742 KVM_CAP_HYPERV_SYNIC : KVM_CAP_HYPERV_SYNIC2; 1743 ret = kvm_vcpu_enable_cap(cs, synic_cap, 0); 1744 if (ret < 0) { 1745 error_report("failed to turn on HyperV SynIC in KVM: %s", 1746 strerror(-ret)); 1747 return ret; 1748 } 1749 1750 if (!cpu->hyperv_synic_kvm_only) { 1751 ret = hyperv_x86_synic_add(cpu); 1752 if (ret < 0) { 1753 error_report("failed to create HyperV SynIC: %s", 1754 strerror(-ret)); 1755 return ret; 1756 } 1757 } 1758 } 1759 1760 if (hyperv_feat_enabled(cpu, HYPERV_FEAT_EVMCS)) { 1761 uint16_t evmcs_version = DEFAULT_EVMCS_VERSION; 1762 uint16_t supported_evmcs_version; 1763 1764 ret = kvm_vcpu_enable_cap(cs, KVM_CAP_HYPERV_ENLIGHTENED_VMCS, 0, 1765 (uintptr_t)&supported_evmcs_version); 1766 1767 /* 1768 * KVM is required to support EVMCS ver.1. as that's what 'hv-evmcs' 1769 * option sets. Note: we hardcode the maximum supported eVMCS version 1770 * to '1' as well so 'hv-evmcs' feature is migratable even when (and if) 1771 * ver.2 is implemented. A new option (e.g. 'hv-evmcs=2') will then have 1772 * to be added. 1773 */ 1774 if (ret < 0) { 1775 error_report("Hyper-V %s is not supported by kernel", 1776 kvm_hyperv_properties[HYPERV_FEAT_EVMCS].desc); 1777 return ret; 1778 } 1779 1780 if (!evmcs_version_supported(evmcs_version, supported_evmcs_version)) { 1781 error_report("eVMCS version range [%d..%d] is not supported by " 1782 "kernel (supported: [%d..%d])", evmcs_version & 0xff, 1783 evmcs_version >> 8, supported_evmcs_version & 0xff, 1784 supported_evmcs_version >> 8); 1785 return -ENOTSUP; 1786 } 1787 } 1788 1789 if (cpu->hyperv_enforce_cpuid) { 1790 ret = kvm_vcpu_enable_cap(cs, KVM_CAP_HYPERV_ENFORCE_CPUID, 0, 1); 1791 if (ret < 0) { 1792 error_report("failed to enable KVM_CAP_HYPERV_ENFORCE_CPUID: %s", 1793 strerror(-ret)); 1794 return ret; 1795 } 1796 } 1797 1798 /* Skip SynIC and VP_INDEX since they are hard deps already */ 1799 if (hyperv_feat_enabled(cpu, HYPERV_FEAT_STIMER) && 1800 hyperv_feat_enabled(cpu, HYPERV_FEAT_VAPIC) && 1801 hyperv_feat_enabled(cpu, HYPERV_FEAT_RUNTIME)) { 1802 hyperv_x86_set_vmbus_recommended_features_enabled(); 1803 } 1804 1805 return 0; 1806 } 1807 1808 static Error *invtsc_mig_blocker; 1809 1810 static void kvm_init_xsave(CPUX86State *env) 1811 { 1812 if (has_xsave2) { 1813 env->xsave_buf_len = QEMU_ALIGN_UP(has_xsave2, 4096); 1814 } else { 1815 env->xsave_buf_len = sizeof(struct kvm_xsave); 1816 } 1817 1818 env->xsave_buf = qemu_memalign(4096, env->xsave_buf_len); 1819 memset(env->xsave_buf, 0, env->xsave_buf_len); 1820 /* 1821 * The allocated storage must be large enough for all of the 1822 * possible XSAVE state components. 1823 */ 1824 assert(kvm_arch_get_supported_cpuid(kvm_state, 0xd, 0, R_ECX) <= 1825 env->xsave_buf_len); 1826 } 1827 1828 static void kvm_init_nested_state(CPUX86State *env) 1829 { 1830 struct kvm_vmx_nested_state_hdr *vmx_hdr; 1831 uint32_t size; 1832 1833 if (!env->nested_state) { 1834 return; 1835 } 1836 1837 size = env->nested_state->size; 1838 1839 memset(env->nested_state, 0, size); 1840 env->nested_state->size = size; 1841 1842 if (cpu_has_vmx(env)) { 1843 env->nested_state->format = KVM_STATE_NESTED_FORMAT_VMX; 1844 vmx_hdr = &env->nested_state->hdr.vmx; 1845 vmx_hdr->vmxon_pa = -1ull; 1846 vmx_hdr->vmcs12_pa = -1ull; 1847 } else if (cpu_has_svm(env)) { 1848 env->nested_state->format = KVM_STATE_NESTED_FORMAT_SVM; 1849 } 1850 } 1851 1852 uint32_t kvm_x86_build_cpuid(CPUX86State *env, struct kvm_cpuid_entry2 *entries, 1853 uint32_t cpuid_i) 1854 { 1855 uint32_t limit, i, j; 1856 uint32_t unused; 1857 struct kvm_cpuid_entry2 *c; 1858 1859 cpu_x86_cpuid(env, 0, 0, &limit, &unused, &unused, &unused); 1860 1861 for (i = 0; i <= limit; i++) { 1862 j = 0; 1863 if (cpuid_i == KVM_MAX_CPUID_ENTRIES) { 1864 goto full; 1865 } 1866 c = &entries[cpuid_i++]; 1867 switch (i) { 1868 case 2: { 1869 /* Keep reading function 2 till all the input is received */ 1870 int times; 1871 1872 c->function = i; 1873 cpu_x86_cpuid(env, i, 0, &c->eax, &c->ebx, &c->ecx, &c->edx); 1874 times = c->eax & 0xff; 1875 if (times > 1) { 1876 c->flags = KVM_CPUID_FLAG_STATEFUL_FUNC | 1877 KVM_CPUID_FLAG_STATE_READ_NEXT; 1878 } 1879 1880 for (j = 1; j < times; ++j) { 1881 if (cpuid_i == KVM_MAX_CPUID_ENTRIES) { 1882 goto full; 1883 } 1884 c = &entries[cpuid_i++]; 1885 c->function = i; 1886 c->flags = KVM_CPUID_FLAG_STATEFUL_FUNC; 1887 cpu_x86_cpuid(env, i, 0, &c->eax, &c->ebx, &c->ecx, &c->edx); 1888 } 1889 break; 1890 } 1891 case 0x1f: 1892 if (!x86_has_cpuid_0x1f(env_archcpu(env))) { 1893 cpuid_i--; 1894 break; 1895 } 1896 /* fallthrough */ 1897 case 4: 1898 case 0xb: 1899 case 0xd: 1900 for (j = 0; ; j++) { 1901 c->function = i; 1902 c->flags = KVM_CPUID_FLAG_SIGNIFCANT_INDEX; 1903 c->index = j; 1904 cpu_x86_cpuid(env, i, j, &c->eax, &c->ebx, &c->ecx, &c->edx); 1905 1906 if (i == 4 && c->eax == 0) { 1907 break; 1908 } 1909 if (i == 0xb && !(c->ecx & 0xff00)) { 1910 break; 1911 } 1912 if (i == 0x1f && !(c->ecx & 0xff00)) { 1913 break; 1914 } 1915 if (i == 0xd && c->eax == 0) { 1916 if (j < 63) { 1917 continue; 1918 } else { 1919 cpuid_i--; 1920 break; 1921 } 1922 } 1923 if (cpuid_i == KVM_MAX_CPUID_ENTRIES) { 1924 goto full; 1925 } 1926 c = &entries[cpuid_i++]; 1927 } 1928 break; 1929 case 0x12: 1930 for (j = 0; ; j++) { 1931 c->function = i; 1932 c->flags = KVM_CPUID_FLAG_SIGNIFCANT_INDEX; 1933 c->index = j; 1934 cpu_x86_cpuid(env, i, j, &c->eax, &c->ebx, &c->ecx, &c->edx); 1935 1936 if (j > 1 && (c->eax & 0xf) != 1) { 1937 break; 1938 } 1939 1940 if (cpuid_i == KVM_MAX_CPUID_ENTRIES) { 1941 goto full; 1942 } 1943 c = &entries[cpuid_i++]; 1944 } 1945 break; 1946 case 0x7: 1947 case 0x14: 1948 case 0x1d: 1949 case 0x1e: 1950 case 0x24: { 1951 uint32_t times; 1952 1953 c->function = i; 1954 c->index = 0; 1955 c->flags = KVM_CPUID_FLAG_SIGNIFCANT_INDEX; 1956 cpu_x86_cpuid(env, i, 0, &c->eax, &c->ebx, &c->ecx, &c->edx); 1957 times = c->eax; 1958 1959 for (j = 1; j <= times; ++j) { 1960 if (cpuid_i == KVM_MAX_CPUID_ENTRIES) { 1961 goto full; 1962 } 1963 c = &entries[cpuid_i++]; 1964 c->function = i; 1965 c->index = j; 1966 c->flags = KVM_CPUID_FLAG_SIGNIFCANT_INDEX; 1967 cpu_x86_cpuid(env, i, j, &c->eax, &c->ebx, &c->ecx, &c->edx); 1968 } 1969 break; 1970 } 1971 default: 1972 c->function = i; 1973 c->flags = 0; 1974 cpu_x86_cpuid(env, i, 0, &c->eax, &c->ebx, &c->ecx, &c->edx); 1975 if (!c->eax && !c->ebx && !c->ecx && !c->edx) { 1976 /* 1977 * KVM already returns all zeroes if a CPUID entry is missing, 1978 * so we can omit it and avoid hitting KVM's 80-entry limit. 1979 */ 1980 cpuid_i--; 1981 } 1982 break; 1983 } 1984 } 1985 1986 if (limit >= 0x0a) { 1987 uint32_t eax, edx; 1988 1989 cpu_x86_cpuid(env, 0x0a, 0, &eax, &unused, &unused, &edx); 1990 1991 has_architectural_pmu_version = eax & 0xff; 1992 if (has_architectural_pmu_version > 0) { 1993 num_architectural_pmu_gp_counters = (eax & 0xff00) >> 8; 1994 1995 /* Shouldn't be more than 32, since that's the number of bits 1996 * available in EBX to tell us _which_ counters are available. 1997 * Play it safe. 1998 */ 1999 if (num_architectural_pmu_gp_counters > MAX_GP_COUNTERS) { 2000 num_architectural_pmu_gp_counters = MAX_GP_COUNTERS; 2001 } 2002 2003 if (has_architectural_pmu_version > 1) { 2004 num_architectural_pmu_fixed_counters = edx & 0x1f; 2005 2006 if (num_architectural_pmu_fixed_counters > MAX_FIXED_COUNTERS) { 2007 num_architectural_pmu_fixed_counters = MAX_FIXED_COUNTERS; 2008 } 2009 } 2010 } 2011 } 2012 2013 cpu_x86_cpuid(env, 0x80000000, 0, &limit, &unused, &unused, &unused); 2014 2015 for (i = 0x80000000; i <= limit; i++) { 2016 j = 0; 2017 if (cpuid_i == KVM_MAX_CPUID_ENTRIES) { 2018 goto full; 2019 } 2020 c = &entries[cpuid_i++]; 2021 2022 switch (i) { 2023 case 0x8000001d: 2024 /* Query for all AMD cache information leaves */ 2025 for (j = 0; ; j++) { 2026 c->function = i; 2027 c->flags = KVM_CPUID_FLAG_SIGNIFCANT_INDEX; 2028 c->index = j; 2029 cpu_x86_cpuid(env, i, j, &c->eax, &c->ebx, &c->ecx, &c->edx); 2030 2031 if (c->eax == 0) { 2032 break; 2033 } 2034 if (cpuid_i == KVM_MAX_CPUID_ENTRIES) { 2035 goto full; 2036 } 2037 c = &entries[cpuid_i++]; 2038 } 2039 break; 2040 default: 2041 c->function = i; 2042 c->flags = 0; 2043 cpu_x86_cpuid(env, i, 0, &c->eax, &c->ebx, &c->ecx, &c->edx); 2044 if (!c->eax && !c->ebx && !c->ecx && !c->edx) { 2045 /* 2046 * KVM already returns all zeroes if a CPUID entry is missing, 2047 * so we can omit it and avoid hitting KVM's 80-entry limit. 2048 */ 2049 cpuid_i--; 2050 } 2051 break; 2052 } 2053 } 2054 2055 /* Call Centaur's CPUID instructions they are supported. */ 2056 if (env->cpuid_xlevel2 > 0) { 2057 cpu_x86_cpuid(env, 0xC0000000, 0, &limit, &unused, &unused, &unused); 2058 2059 for (i = 0xC0000000; i <= limit; i++) { 2060 j = 0; 2061 if (cpuid_i == KVM_MAX_CPUID_ENTRIES) { 2062 goto full; 2063 } 2064 c = &entries[cpuid_i++]; 2065 2066 c->function = i; 2067 c->flags = 0; 2068 cpu_x86_cpuid(env, i, 0, &c->eax, &c->ebx, &c->ecx, &c->edx); 2069 } 2070 } 2071 2072 return cpuid_i; 2073 2074 full: 2075 fprintf(stderr, "cpuid_data is full, no space for " 2076 "cpuid(eax:0x%x,ecx:0x%x)\n", i, j); 2077 abort(); 2078 } 2079 2080 int kvm_arch_pre_create_vcpu(CPUState *cpu, Error **errp) 2081 { 2082 if (is_tdx_vm()) { 2083 return tdx_pre_create_vcpu(cpu, errp); 2084 } 2085 2086 return 0; 2087 } 2088 2089 int kvm_arch_init_vcpu(CPUState *cs) 2090 { 2091 struct { 2092 struct kvm_cpuid2 cpuid; 2093 struct kvm_cpuid_entry2 entries[KVM_MAX_CPUID_ENTRIES]; 2094 } cpuid_data; 2095 /* 2096 * The kernel defines these structs with padding fields so there 2097 * should be no extra padding in our cpuid_data struct. 2098 */ 2099 QEMU_BUILD_BUG_ON(sizeof(cpuid_data) != 2100 sizeof(struct kvm_cpuid2) + 2101 sizeof(struct kvm_cpuid_entry2) * KVM_MAX_CPUID_ENTRIES); 2102 2103 X86CPU *cpu = X86_CPU(cs); 2104 CPUX86State *env = &cpu->env; 2105 uint32_t cpuid_i; 2106 struct kvm_cpuid_entry2 *c; 2107 uint32_t signature[3]; 2108 int kvm_base = KVM_CPUID_SIGNATURE; 2109 int max_nested_state_len; 2110 int r; 2111 Error *local_err = NULL; 2112 2113 if (current_machine->cgs) { 2114 r = x86_confidential_guest_check_features( 2115 X86_CONFIDENTIAL_GUEST(current_machine->cgs), cs); 2116 if (r < 0) { 2117 return r; 2118 } 2119 } 2120 2121 memset(&cpuid_data, 0, sizeof(cpuid_data)); 2122 2123 cpuid_i = 0; 2124 2125 has_xsave2 = kvm_check_extension(cs->kvm_state, KVM_CAP_XSAVE2); 2126 2127 r = kvm_arch_set_tsc_khz(cs); 2128 if (r < 0) { 2129 return r; 2130 } 2131 2132 /* vcpu's TSC frequency is either specified by user, or following 2133 * the value used by KVM if the former is not present. In the 2134 * latter case, we query it from KVM and record in env->tsc_khz, 2135 * so that vcpu's TSC frequency can be migrated later via this field. 2136 */ 2137 if (!env->tsc_khz) { 2138 r = kvm_check_extension(cs->kvm_state, KVM_CAP_GET_TSC_KHZ) ? 2139 kvm_vcpu_ioctl(cs, KVM_GET_TSC_KHZ) : 2140 -ENOTSUP; 2141 if (r > 0) { 2142 env->tsc_khz = r; 2143 } 2144 } 2145 2146 env->apic_bus_freq = KVM_APIC_BUS_FREQUENCY; 2147 2148 /* 2149 * kvm_hyperv_expand_features() is called here for the second time in case 2150 * KVM_CAP_SYS_HYPERV_CPUID is not supported. While we can't possibly handle 2151 * 'query-cpu-model-expansion' in this case as we don't have a KVM vCPU to 2152 * check which Hyper-V enlightenments are supported and which are not, we 2153 * can still proceed and check/expand Hyper-V enlightenments here so legacy 2154 * behavior is preserved. 2155 */ 2156 if (!kvm_hyperv_expand_features(cpu, &local_err)) { 2157 error_report_err(local_err); 2158 return -ENOSYS; 2159 } 2160 2161 if (hyperv_enabled(cpu)) { 2162 r = hyperv_init_vcpu(cpu); 2163 if (r) { 2164 return r; 2165 } 2166 2167 cpuid_i = hyperv_fill_cpuids(cs, cpuid_data.entries); 2168 kvm_base = KVM_CPUID_SIGNATURE_NEXT; 2169 has_msr_hv_hypercall = true; 2170 } 2171 2172 if (cs->kvm_state->xen_version) { 2173 #ifdef CONFIG_XEN_EMU 2174 struct kvm_cpuid_entry2 *xen_max_leaf; 2175 2176 memcpy(signature, "XenVMMXenVMM", 12); 2177 2178 xen_max_leaf = c = &cpuid_data.entries[cpuid_i++]; 2179 c->function = kvm_base + XEN_CPUID_SIGNATURE; 2180 c->eax = kvm_base + XEN_CPUID_TIME; 2181 c->ebx = signature[0]; 2182 c->ecx = signature[1]; 2183 c->edx = signature[2]; 2184 2185 c = &cpuid_data.entries[cpuid_i++]; 2186 c->function = kvm_base + XEN_CPUID_VENDOR; 2187 c->eax = cs->kvm_state->xen_version; 2188 c->ebx = 0; 2189 c->ecx = 0; 2190 c->edx = 0; 2191 2192 c = &cpuid_data.entries[cpuid_i++]; 2193 c->function = kvm_base + XEN_CPUID_HVM_MSR; 2194 /* Number of hypercall-transfer pages */ 2195 c->eax = 1; 2196 /* Hypercall MSR base address */ 2197 if (hyperv_enabled(cpu)) { 2198 c->ebx = XEN_HYPERCALL_MSR_HYPERV; 2199 kvm_xen_init(cs->kvm_state, c->ebx); 2200 } else { 2201 c->ebx = XEN_HYPERCALL_MSR; 2202 } 2203 c->ecx = 0; 2204 c->edx = 0; 2205 2206 c = &cpuid_data.entries[cpuid_i++]; 2207 c->function = kvm_base + XEN_CPUID_TIME; 2208 c->eax = ((!!tsc_is_stable_and_known(env) << 1) | 2209 (!!(env->features[FEAT_8000_0001_EDX] & CPUID_EXT2_RDTSCP) << 2)); 2210 /* default=0 (emulate if necessary) */ 2211 c->ebx = 0; 2212 /* guest tsc frequency */ 2213 c->ecx = env->user_tsc_khz; 2214 /* guest tsc incarnation (migration count) */ 2215 c->edx = 0; 2216 2217 c = &cpuid_data.entries[cpuid_i++]; 2218 c->function = kvm_base + XEN_CPUID_HVM; 2219 xen_max_leaf->eax = kvm_base + XEN_CPUID_HVM; 2220 if (cs->kvm_state->xen_version >= XEN_VERSION(4, 5)) { 2221 c->function = kvm_base + XEN_CPUID_HVM; 2222 2223 if (cpu->xen_vapic) { 2224 c->eax |= XEN_HVM_CPUID_APIC_ACCESS_VIRT; 2225 c->eax |= XEN_HVM_CPUID_X2APIC_VIRT; 2226 } 2227 2228 c->eax |= XEN_HVM_CPUID_IOMMU_MAPPINGS; 2229 2230 if (cs->kvm_state->xen_version >= XEN_VERSION(4, 6)) { 2231 c->eax |= XEN_HVM_CPUID_VCPU_ID_PRESENT; 2232 c->ebx = cs->cpu_index; 2233 } 2234 2235 if (cs->kvm_state->xen_version >= XEN_VERSION(4, 17)) { 2236 c->eax |= XEN_HVM_CPUID_UPCALL_VECTOR; 2237 } 2238 } 2239 2240 r = kvm_xen_init_vcpu(cs); 2241 if (r) { 2242 return r; 2243 } 2244 2245 kvm_base += 0x100; 2246 #else /* CONFIG_XEN_EMU */ 2247 /* This should never happen as kvm_arch_init() would have died first. */ 2248 fprintf(stderr, "Cannot enable Xen CPUID without Xen support\n"); 2249 abort(); 2250 #endif 2251 } else if (cpu->expose_kvm) { 2252 memcpy(signature, "KVMKVMKVM\0\0\0", 12); 2253 c = &cpuid_data.entries[cpuid_i++]; 2254 c->function = KVM_CPUID_SIGNATURE | kvm_base; 2255 c->eax = KVM_CPUID_FEATURES | kvm_base; 2256 c->ebx = signature[0]; 2257 c->ecx = signature[1]; 2258 c->edx = signature[2]; 2259 2260 c = &cpuid_data.entries[cpuid_i++]; 2261 c->function = KVM_CPUID_FEATURES | kvm_base; 2262 c->eax = env->features[FEAT_KVM]; 2263 c->edx = env->features[FEAT_KVM_HINTS]; 2264 } 2265 2266 if (cpu->kvm_pv_enforce_cpuid) { 2267 r = kvm_vcpu_enable_cap(cs, KVM_CAP_ENFORCE_PV_FEATURE_CPUID, 0, 1); 2268 if (r < 0) { 2269 fprintf(stderr, 2270 "failed to enable KVM_CAP_ENFORCE_PV_FEATURE_CPUID: %s", 2271 strerror(-r)); 2272 abort(); 2273 } 2274 } 2275 2276 cpuid_i = kvm_x86_build_cpuid(env, cpuid_data.entries, cpuid_i); 2277 cpuid_data.cpuid.nent = cpuid_i; 2278 2279 if (x86_cpu_family(env->cpuid_version) >= 6 2280 && (env->features[FEAT_1_EDX] & (CPUID_MCE | CPUID_MCA)) == 2281 (CPUID_MCE | CPUID_MCA)) { 2282 uint64_t mcg_cap, unsupported_caps; 2283 int banks; 2284 int ret; 2285 2286 ret = kvm_get_mce_cap_supported(cs->kvm_state, &mcg_cap, &banks); 2287 if (ret < 0) { 2288 fprintf(stderr, "kvm_get_mce_cap_supported: %s", strerror(-ret)); 2289 return ret; 2290 } 2291 2292 if (banks < (env->mcg_cap & MCG_CAP_BANKS_MASK)) { 2293 error_report("kvm: Unsupported MCE bank count (QEMU = %d, KVM = %d)", 2294 (int)(env->mcg_cap & MCG_CAP_BANKS_MASK), banks); 2295 return -ENOTSUP; 2296 } 2297 2298 unsupported_caps = env->mcg_cap & ~(mcg_cap | MCG_CAP_BANKS_MASK); 2299 if (unsupported_caps) { 2300 if (unsupported_caps & MCG_LMCE_P) { 2301 error_report("kvm: LMCE not supported"); 2302 return -ENOTSUP; 2303 } 2304 warn_report("Unsupported MCG_CAP bits: 0x%" PRIx64, 2305 unsupported_caps); 2306 } 2307 2308 env->mcg_cap &= mcg_cap | MCG_CAP_BANKS_MASK; 2309 ret = kvm_vcpu_ioctl(cs, KVM_X86_SETUP_MCE, &env->mcg_cap); 2310 if (ret < 0) { 2311 fprintf(stderr, "KVM_X86_SETUP_MCE: %s", strerror(-ret)); 2312 return ret; 2313 } 2314 } 2315 2316 cpu->vmsentry = qemu_add_vm_change_state_handler(cpu_update_state, env); 2317 2318 c = cpuid_find_entry(&cpuid_data.cpuid, 1, 0); 2319 if (c) { 2320 has_msr_feature_control = !!(c->ecx & CPUID_EXT_VMX) || 2321 !!(c->ecx & CPUID_EXT_SMX); 2322 } 2323 2324 c = cpuid_find_entry(&cpuid_data.cpuid, 7, 0); 2325 if (c && (c->ebx & CPUID_7_0_EBX_SGX)) { 2326 has_msr_feature_control = true; 2327 } 2328 2329 if (env->mcg_cap & MCG_LMCE_P) { 2330 has_msr_mcg_ext_ctl = has_msr_feature_control = true; 2331 } 2332 2333 if (!env->user_tsc_khz) { 2334 if ((env->features[FEAT_8000_0007_EDX] & CPUID_APM_INVTSC) && 2335 invtsc_mig_blocker == NULL) { 2336 error_setg(&invtsc_mig_blocker, 2337 "State blocked by non-migratable CPU device" 2338 " (invtsc flag)"); 2339 r = migrate_add_blocker(&invtsc_mig_blocker, &local_err); 2340 if (r < 0) { 2341 error_report_err(local_err); 2342 return r; 2343 } 2344 } 2345 } 2346 2347 if (cpu->vmware_cpuid_freq 2348 /* Guests depend on 0x40000000 to detect this feature, so only expose 2349 * it if KVM exposes leaf 0x40000000. (Conflicts with Hyper-V) */ 2350 && cpu->expose_kvm 2351 && kvm_base == KVM_CPUID_SIGNATURE 2352 /* TSC clock must be stable and known for this feature. */ 2353 && tsc_is_stable_and_known(env)) { 2354 2355 c = &cpuid_data.entries[cpuid_i++]; 2356 c->function = KVM_CPUID_SIGNATURE | 0x10; 2357 c->eax = env->tsc_khz; 2358 c->ebx = env->apic_bus_freq / 1000; /* Hz to KHz */ 2359 c->ecx = c->edx = 0; 2360 2361 c = cpuid_find_entry(&cpuid_data.cpuid, kvm_base, 0); 2362 c->eax = MAX(c->eax, KVM_CPUID_SIGNATURE | 0x10); 2363 } 2364 2365 cpuid_data.cpuid.nent = cpuid_i; 2366 2367 cpuid_data.cpuid.padding = 0; 2368 r = kvm_vcpu_ioctl(cs, KVM_SET_CPUID2, &cpuid_data); 2369 if (r) { 2370 goto fail; 2371 } 2372 kvm_init_xsave(env); 2373 2374 max_nested_state_len = kvm_max_nested_state_length(); 2375 if (max_nested_state_len > 0) { 2376 assert(max_nested_state_len >= offsetof(struct kvm_nested_state, data)); 2377 2378 if (cpu_has_vmx(env) || cpu_has_svm(env)) { 2379 env->nested_state = g_malloc0(max_nested_state_len); 2380 env->nested_state->size = max_nested_state_len; 2381 2382 kvm_init_nested_state(env); 2383 } 2384 } 2385 2386 cpu->kvm_msr_buf = g_malloc0(MSR_BUF_SIZE); 2387 2388 if (!(env->features[FEAT_8000_0001_EDX] & CPUID_EXT2_RDTSCP)) { 2389 has_msr_tsc_aux = false; 2390 } 2391 2392 kvm_init_msrs(cpu); 2393 2394 return 0; 2395 2396 fail: 2397 migrate_del_blocker(&invtsc_mig_blocker); 2398 2399 return r; 2400 } 2401 2402 int kvm_arch_destroy_vcpu(CPUState *cs) 2403 { 2404 X86CPU *cpu = X86_CPU(cs); 2405 CPUX86State *env = &cpu->env; 2406 2407 g_free(env->xsave_buf); 2408 2409 g_free(cpu->kvm_msr_buf); 2410 cpu->kvm_msr_buf = NULL; 2411 2412 g_free(env->nested_state); 2413 env->nested_state = NULL; 2414 2415 qemu_del_vm_change_state_handler(cpu->vmsentry); 2416 2417 return 0; 2418 } 2419 2420 void kvm_arch_reset_vcpu(X86CPU *cpu) 2421 { 2422 CPUX86State *env = &cpu->env; 2423 2424 env->xcr0 = 1; 2425 if (kvm_irqchip_in_kernel()) { 2426 env->mp_state = cpu_is_bsp(cpu) ? KVM_MP_STATE_RUNNABLE : 2427 KVM_MP_STATE_UNINITIALIZED; 2428 } else { 2429 env->mp_state = KVM_MP_STATE_RUNNABLE; 2430 } 2431 2432 /* enabled by default */ 2433 env->poll_control_msr = 1; 2434 2435 kvm_init_nested_state(env); 2436 2437 sev_es_set_reset_vector(CPU(cpu)); 2438 } 2439 2440 void kvm_arch_after_reset_vcpu(X86CPU *cpu) 2441 { 2442 CPUX86State *env = &cpu->env; 2443 int i; 2444 2445 /* 2446 * Reset SynIC after all other devices have been reset to let them remove 2447 * their SINT routes first. 2448 */ 2449 if (hyperv_feat_enabled(cpu, HYPERV_FEAT_SYNIC)) { 2450 for (i = 0; i < ARRAY_SIZE(env->msr_hv_synic_sint); i++) { 2451 env->msr_hv_synic_sint[i] = HV_SINT_MASKED; 2452 } 2453 2454 hyperv_x86_synic_reset(cpu); 2455 } 2456 } 2457 2458 void kvm_arch_reset_parked_vcpu(unsigned long vcpu_id, int kvm_fd) 2459 { 2460 g_autofree struct kvm_msrs *msrs = NULL; 2461 2462 msrs = g_malloc0(sizeof(*msrs) + sizeof(msrs->entries[0])); 2463 msrs->entries[0].index = MSR_IA32_TSC; 2464 msrs->entries[0].data = 1; /* match the value in x86_cpu_reset() */ 2465 msrs->nmsrs++; 2466 2467 if (ioctl(kvm_fd, KVM_SET_MSRS, msrs) != 1) { 2468 warn_report("parked vCPU %lu TSC reset failed: %d", 2469 vcpu_id, errno); 2470 } 2471 } 2472 2473 void kvm_arch_do_init_vcpu(X86CPU *cpu) 2474 { 2475 CPUX86State *env = &cpu->env; 2476 2477 /* APs get directly into wait-for-SIPI state. */ 2478 if (env->mp_state == KVM_MP_STATE_UNINITIALIZED) { 2479 env->mp_state = KVM_MP_STATE_INIT_RECEIVED; 2480 } 2481 } 2482 2483 static int kvm_get_supported_feature_msrs(KVMState *s) 2484 { 2485 int ret = 0; 2486 2487 if (kvm_feature_msrs != NULL) { 2488 return 0; 2489 } 2490 2491 if (!kvm_check_extension(s, KVM_CAP_GET_MSR_FEATURES)) { 2492 return 0; 2493 } 2494 2495 struct kvm_msr_list msr_list; 2496 2497 msr_list.nmsrs = 0; 2498 ret = kvm_ioctl(s, KVM_GET_MSR_FEATURE_INDEX_LIST, &msr_list); 2499 if (ret < 0 && ret != -E2BIG) { 2500 error_report("Fetch KVM feature MSR list failed: %s", 2501 strerror(-ret)); 2502 return ret; 2503 } 2504 2505 assert(msr_list.nmsrs > 0); 2506 kvm_feature_msrs = g_malloc0(sizeof(msr_list) + 2507 msr_list.nmsrs * sizeof(msr_list.indices[0])); 2508 2509 kvm_feature_msrs->nmsrs = msr_list.nmsrs; 2510 ret = kvm_ioctl(s, KVM_GET_MSR_FEATURE_INDEX_LIST, kvm_feature_msrs); 2511 2512 if (ret < 0) { 2513 error_report("Fetch KVM feature MSR list failed: %s", 2514 strerror(-ret)); 2515 g_free(kvm_feature_msrs); 2516 kvm_feature_msrs = NULL; 2517 return ret; 2518 } 2519 2520 return 0; 2521 } 2522 2523 static int kvm_get_supported_msrs(KVMState *s) 2524 { 2525 int ret = 0; 2526 struct kvm_msr_list msr_list, *kvm_msr_list; 2527 2528 /* 2529 * Obtain MSR list from KVM. These are the MSRs that we must 2530 * save/restore. 2531 */ 2532 msr_list.nmsrs = 0; 2533 ret = kvm_ioctl(s, KVM_GET_MSR_INDEX_LIST, &msr_list); 2534 if (ret < 0 && ret != -E2BIG) { 2535 return ret; 2536 } 2537 /* 2538 * Old kernel modules had a bug and could write beyond the provided 2539 * memory. Allocate at least a safe amount of 1K. 2540 */ 2541 kvm_msr_list = g_malloc0(MAX(1024, sizeof(msr_list) + 2542 msr_list.nmsrs * 2543 sizeof(msr_list.indices[0]))); 2544 2545 kvm_msr_list->nmsrs = msr_list.nmsrs; 2546 ret = kvm_ioctl(s, KVM_GET_MSR_INDEX_LIST, kvm_msr_list); 2547 if (ret >= 0) { 2548 int i; 2549 2550 for (i = 0; i < kvm_msr_list->nmsrs; i++) { 2551 switch (kvm_msr_list->indices[i]) { 2552 case MSR_STAR: 2553 has_msr_star = true; 2554 break; 2555 case MSR_VM_HSAVE_PA: 2556 has_msr_hsave_pa = true; 2557 break; 2558 case MSR_TSC_AUX: 2559 has_msr_tsc_aux = true; 2560 break; 2561 case MSR_TSC_ADJUST: 2562 has_msr_tsc_adjust = true; 2563 break; 2564 case MSR_IA32_TSCDEADLINE: 2565 has_msr_tsc_deadline = true; 2566 break; 2567 case MSR_IA32_SMBASE: 2568 has_msr_smbase = true; 2569 break; 2570 case MSR_SMI_COUNT: 2571 has_msr_smi_count = true; 2572 break; 2573 case MSR_IA32_MISC_ENABLE: 2574 has_msr_misc_enable = true; 2575 break; 2576 case MSR_IA32_BNDCFGS: 2577 has_msr_bndcfgs = true; 2578 break; 2579 case MSR_IA32_XSS: 2580 has_msr_xss = true; 2581 break; 2582 case MSR_IA32_UMWAIT_CONTROL: 2583 has_msr_umwait = true; 2584 break; 2585 case HV_X64_MSR_CRASH_CTL: 2586 has_msr_hv_crash = true; 2587 break; 2588 case HV_X64_MSR_RESET: 2589 has_msr_hv_reset = true; 2590 break; 2591 case HV_X64_MSR_VP_INDEX: 2592 has_msr_hv_vpindex = true; 2593 break; 2594 case HV_X64_MSR_VP_RUNTIME: 2595 has_msr_hv_runtime = true; 2596 break; 2597 case HV_X64_MSR_SCONTROL: 2598 has_msr_hv_synic = true; 2599 break; 2600 case HV_X64_MSR_STIMER0_CONFIG: 2601 has_msr_hv_stimer = true; 2602 break; 2603 case HV_X64_MSR_TSC_FREQUENCY: 2604 has_msr_hv_frequencies = true; 2605 break; 2606 case HV_X64_MSR_REENLIGHTENMENT_CONTROL: 2607 has_msr_hv_reenlightenment = true; 2608 break; 2609 case HV_X64_MSR_SYNDBG_OPTIONS: 2610 has_msr_hv_syndbg_options = true; 2611 break; 2612 case MSR_IA32_SPEC_CTRL: 2613 has_msr_spec_ctrl = true; 2614 break; 2615 case MSR_AMD64_TSC_RATIO: 2616 has_tsc_scale_msr = true; 2617 break; 2618 case MSR_IA32_TSX_CTRL: 2619 has_msr_tsx_ctrl = true; 2620 break; 2621 case MSR_VIRT_SSBD: 2622 has_msr_virt_ssbd = true; 2623 break; 2624 case MSR_IA32_ARCH_CAPABILITIES: 2625 has_msr_arch_capabs = true; 2626 break; 2627 case MSR_IA32_CORE_CAPABILITY: 2628 has_msr_core_capabs = true; 2629 break; 2630 case MSR_IA32_PERF_CAPABILITIES: 2631 has_msr_perf_capabs = true; 2632 break; 2633 case MSR_IA32_VMX_VMFUNC: 2634 has_msr_vmx_vmfunc = true; 2635 break; 2636 case MSR_IA32_UCODE_REV: 2637 has_msr_ucode_rev = true; 2638 break; 2639 case MSR_IA32_VMX_PROCBASED_CTLS2: 2640 has_msr_vmx_procbased_ctls2 = true; 2641 break; 2642 case MSR_IA32_PKRS: 2643 has_msr_pkrs = true; 2644 break; 2645 case MSR_K7_HWCR: 2646 has_msr_hwcr = true; 2647 } 2648 } 2649 } 2650 2651 g_free(kvm_msr_list); 2652 2653 return ret; 2654 } 2655 2656 static bool kvm_rdmsr_core_thread_count(X86CPU *cpu, 2657 uint32_t msr, 2658 uint64_t *val) 2659 { 2660 *val = cpu_x86_get_msr_core_thread_count(cpu); 2661 2662 return true; 2663 } 2664 2665 static bool kvm_rdmsr_rapl_power_unit(X86CPU *cpu, 2666 uint32_t msr, 2667 uint64_t *val) 2668 { 2669 2670 CPUState *cs = CPU(cpu); 2671 2672 *val = cs->kvm_state->msr_energy.msr_unit; 2673 2674 return true; 2675 } 2676 2677 static bool kvm_rdmsr_pkg_power_limit(X86CPU *cpu, 2678 uint32_t msr, 2679 uint64_t *val) 2680 { 2681 2682 CPUState *cs = CPU(cpu); 2683 2684 *val = cs->kvm_state->msr_energy.msr_limit; 2685 2686 return true; 2687 } 2688 2689 static bool kvm_rdmsr_pkg_power_info(X86CPU *cpu, 2690 uint32_t msr, 2691 uint64_t *val) 2692 { 2693 2694 CPUState *cs = CPU(cpu); 2695 2696 *val = cs->kvm_state->msr_energy.msr_info; 2697 2698 return true; 2699 } 2700 2701 static bool kvm_rdmsr_pkg_energy_status(X86CPU *cpu, 2702 uint32_t msr, 2703 uint64_t *val) 2704 { 2705 2706 CPUState *cs = CPU(cpu); 2707 *val = cs->kvm_state->msr_energy.msr_value[cs->cpu_index]; 2708 2709 return true; 2710 } 2711 2712 static Notifier smram_machine_done; 2713 static KVMMemoryListener smram_listener; 2714 static AddressSpace smram_address_space; 2715 static MemoryRegion smram_as_root; 2716 static MemoryRegion smram_as_mem; 2717 2718 static void register_smram_listener(Notifier *n, void *unused) 2719 { 2720 CPUState *cpu; 2721 MemoryRegion *smram = 2722 (MemoryRegion *) object_resolve_path("/machine/smram", NULL); 2723 2724 /* Outer container... */ 2725 memory_region_init(&smram_as_root, OBJECT(kvm_state), "mem-container-smram", ~0ull); 2726 memory_region_set_enabled(&smram_as_root, true); 2727 2728 /* ... with two regions inside: normal system memory with low 2729 * priority, and... 2730 */ 2731 memory_region_init_alias(&smram_as_mem, OBJECT(kvm_state), "mem-smram", 2732 get_system_memory(), 0, ~0ull); 2733 memory_region_add_subregion_overlap(&smram_as_root, 0, &smram_as_mem, 0); 2734 memory_region_set_enabled(&smram_as_mem, true); 2735 2736 if (smram) { 2737 /* ... SMRAM with higher priority */ 2738 memory_region_add_subregion_overlap(&smram_as_root, 0, smram, 10); 2739 memory_region_set_enabled(smram, true); 2740 } 2741 2742 address_space_init(&smram_address_space, &smram_as_root, "KVM-SMRAM"); 2743 kvm_memory_listener_register(kvm_state, &smram_listener, 2744 &smram_address_space, X86ASIdx_SMM, "kvm-smram"); 2745 2746 CPU_FOREACH(cpu) { 2747 cpu_address_space_init(cpu, X86ASIdx_SMM, "cpu-smm", &smram_as_root); 2748 } 2749 } 2750 2751 /* It should only be called in cpu's hotplug callback */ 2752 void kvm_smm_cpu_address_space_init(X86CPU *cpu) 2753 { 2754 cpu_address_space_init(CPU(cpu), X86ASIdx_SMM, "cpu-smm", &smram_as_root); 2755 } 2756 2757 static void *kvm_msr_energy_thread(void *data) 2758 { 2759 KVMState *s = data; 2760 struct KVMMsrEnergy *vmsr = &s->msr_energy; 2761 2762 g_autofree vmsr_package_energy_stat *pkg_stat = NULL; 2763 g_autofree vmsr_thread_stat *thd_stat = NULL; 2764 g_autofree CPUState *cpu = NULL; 2765 g_autofree unsigned int *vpkgs_energy_stat = NULL; 2766 unsigned int num_threads = 0; 2767 2768 X86CPUTopoIDs topo_ids; 2769 2770 rcu_register_thread(); 2771 2772 /* Allocate memory for each package energy status */ 2773 pkg_stat = g_new0(vmsr_package_energy_stat, vmsr->host_topo.maxpkgs); 2774 2775 /* Allocate memory for thread stats */ 2776 thd_stat = g_new0(vmsr_thread_stat, 1); 2777 2778 /* Allocate memory for holding virtual package energy counter */ 2779 vpkgs_energy_stat = g_new0(unsigned int, vmsr->guest_vsockets); 2780 2781 /* Populate the max tick of each packages */ 2782 for (int i = 0; i < vmsr->host_topo.maxpkgs; i++) { 2783 /* 2784 * Max numbers of ticks per package 2785 * Time in second * Number of ticks/second * Number of cores/package 2786 * ex: 100 ticks/second/CPU, 12 CPUs per Package gives 1200 ticks max 2787 */ 2788 vmsr->host_topo.maxticks[i] = (MSR_ENERGY_THREAD_SLEEP_US / 1000000) 2789 * sysconf(_SC_CLK_TCK) 2790 * vmsr->host_topo.pkg_cpu_count[i]; 2791 } 2792 2793 while (true) { 2794 /* Get all qemu threads id */ 2795 g_autofree pid_t *thread_ids 2796 = vmsr_get_thread_ids(vmsr->pid, &num_threads); 2797 2798 if (thread_ids == NULL) { 2799 goto clean; 2800 } 2801 2802 thd_stat = g_renew(vmsr_thread_stat, thd_stat, num_threads); 2803 /* Unlike g_new0, g_renew0 function doesn't exist yet... */ 2804 memset(thd_stat, 0, num_threads * sizeof(vmsr_thread_stat)); 2805 2806 /* Populate all the thread stats */ 2807 for (int i = 0; i < num_threads; i++) { 2808 thd_stat[i].utime = g_new0(unsigned long long, 2); 2809 thd_stat[i].stime = g_new0(unsigned long long, 2); 2810 thd_stat[i].thread_id = thread_ids[i]; 2811 vmsr_read_thread_stat(vmsr->pid, 2812 thd_stat[i].thread_id, 2813 &thd_stat[i].utime[0], 2814 &thd_stat[i].stime[0], 2815 &thd_stat[i].cpu_id); 2816 thd_stat[i].pkg_id = 2817 vmsr_get_physical_package_id(thd_stat[i].cpu_id); 2818 } 2819 2820 /* Retrieve all packages power plane energy counter */ 2821 for (int i = 0; i < vmsr->host_topo.maxpkgs; i++) { 2822 for (int j = 0; j < num_threads; j++) { 2823 /* 2824 * Use the first thread we found that ran on the CPU 2825 * of the package to read the packages energy counter 2826 */ 2827 if (thd_stat[j].pkg_id == i) { 2828 pkg_stat[i].e_start = 2829 vmsr_read_msr(MSR_PKG_ENERGY_STATUS, 2830 thd_stat[j].cpu_id, 2831 thd_stat[j].thread_id, 2832 s->msr_energy.sioc); 2833 break; 2834 } 2835 } 2836 } 2837 2838 /* Sleep a short period while the other threads are working */ 2839 usleep(MSR_ENERGY_THREAD_SLEEP_US); 2840 2841 /* 2842 * Retrieve all packages power plane energy counter 2843 * Calculate the delta of all packages 2844 */ 2845 for (int i = 0; i < vmsr->host_topo.maxpkgs; i++) { 2846 for (int j = 0; j < num_threads; j++) { 2847 /* 2848 * Use the first thread we found that ran on the CPU 2849 * of the package to read the packages energy counter 2850 */ 2851 if (thd_stat[j].pkg_id == i) { 2852 pkg_stat[i].e_end = 2853 vmsr_read_msr(MSR_PKG_ENERGY_STATUS, 2854 thd_stat[j].cpu_id, 2855 thd_stat[j].thread_id, 2856 s->msr_energy.sioc); 2857 /* 2858 * Prevent the case we have migrate the VM 2859 * during the sleep period or any other cases 2860 * were energy counter might be lower after 2861 * the sleep period. 2862 */ 2863 if (pkg_stat[i].e_end > pkg_stat[i].e_start) { 2864 pkg_stat[i].e_delta = 2865 pkg_stat[i].e_end - pkg_stat[i].e_start; 2866 } else { 2867 pkg_stat[i].e_delta = 0; 2868 } 2869 break; 2870 } 2871 } 2872 } 2873 2874 /* Delta of ticks spend by each thread between the sample */ 2875 for (int i = 0; i < num_threads; i++) { 2876 vmsr_read_thread_stat(vmsr->pid, 2877 thd_stat[i].thread_id, 2878 &thd_stat[i].utime[1], 2879 &thd_stat[i].stime[1], 2880 &thd_stat[i].cpu_id); 2881 2882 if (vmsr->pid < 0) { 2883 /* 2884 * We don't count the dead thread 2885 * i.e threads that existed before the sleep 2886 * and not anymore 2887 */ 2888 thd_stat[i].delta_ticks = 0; 2889 } else { 2890 vmsr_delta_ticks(thd_stat, i); 2891 } 2892 } 2893 2894 /* 2895 * Identify the vcpu threads 2896 * Calculate the number of vcpu per package 2897 */ 2898 CPU_FOREACH(cpu) { 2899 for (int i = 0; i < num_threads; i++) { 2900 if (cpu->thread_id == thd_stat[i].thread_id) { 2901 thd_stat[i].is_vcpu = true; 2902 thd_stat[i].vcpu_id = cpu->cpu_index; 2903 pkg_stat[thd_stat[i].pkg_id].nb_vcpu++; 2904 thd_stat[i].acpi_id = kvm_arch_vcpu_id(cpu); 2905 break; 2906 } 2907 } 2908 } 2909 2910 /* Retrieve the virtual package number of each vCPU */ 2911 for (int i = 0; i < vmsr->guest_cpu_list->len; i++) { 2912 for (int j = 0; j < num_threads; j++) { 2913 if ((thd_stat[j].acpi_id == 2914 vmsr->guest_cpu_list->cpus[i].arch_id) 2915 && (thd_stat[j].is_vcpu == true)) { 2916 x86_topo_ids_from_apicid(thd_stat[j].acpi_id, 2917 &vmsr->guest_topo_info, &topo_ids); 2918 thd_stat[j].vpkg_id = topo_ids.pkg_id; 2919 } 2920 } 2921 } 2922 2923 /* Calculate the total energy of all non-vCPU thread */ 2924 for (int i = 0; i < num_threads; i++) { 2925 if ((thd_stat[i].is_vcpu != true) && 2926 (thd_stat[i].delta_ticks > 0)) { 2927 double temp; 2928 temp = vmsr_get_ratio(pkg_stat[thd_stat[i].pkg_id].e_delta, 2929 thd_stat[i].delta_ticks, 2930 vmsr->host_topo.maxticks[thd_stat[i].pkg_id]); 2931 pkg_stat[thd_stat[i].pkg_id].e_ratio 2932 += (uint64_t)lround(temp); 2933 } 2934 } 2935 2936 /* Calculate the ratio per non-vCPU thread of each package */ 2937 for (int i = 0; i < vmsr->host_topo.maxpkgs; i++) { 2938 if (pkg_stat[i].nb_vcpu > 0) { 2939 pkg_stat[i].e_ratio = pkg_stat[i].e_ratio / pkg_stat[i].nb_vcpu; 2940 } 2941 } 2942 2943 /* 2944 * Calculate the energy for each Package: 2945 * Energy Package = sum of each vCPU energy that belongs to the package 2946 */ 2947 for (int i = 0; i < num_threads; i++) { 2948 if ((thd_stat[i].is_vcpu == true) && \ 2949 (thd_stat[i].delta_ticks > 0)) { 2950 double temp; 2951 temp = vmsr_get_ratio(pkg_stat[thd_stat[i].pkg_id].e_delta, 2952 thd_stat[i].delta_ticks, 2953 vmsr->host_topo.maxticks[thd_stat[i].pkg_id]); 2954 vpkgs_energy_stat[thd_stat[i].vpkg_id] += 2955 (uint64_t)lround(temp); 2956 vpkgs_energy_stat[thd_stat[i].vpkg_id] += 2957 pkg_stat[thd_stat[i].pkg_id].e_ratio; 2958 } 2959 } 2960 2961 /* 2962 * Finally populate the vmsr register of each vCPU with the total 2963 * package value to emulate the real hardware where each CPU return the 2964 * value of the package it belongs. 2965 */ 2966 for (int i = 0; i < num_threads; i++) { 2967 if ((thd_stat[i].is_vcpu == true) && \ 2968 (thd_stat[i].delta_ticks > 0)) { 2969 vmsr->msr_value[thd_stat[i].vcpu_id] = \ 2970 vpkgs_energy_stat[thd_stat[i].vpkg_id]; 2971 } 2972 } 2973 2974 /* Freeing memory before zeroing the pointer */ 2975 for (int i = 0; i < num_threads; i++) { 2976 g_free(thd_stat[i].utime); 2977 g_free(thd_stat[i].stime); 2978 } 2979 } 2980 2981 clean: 2982 rcu_unregister_thread(); 2983 return NULL; 2984 } 2985 2986 static int kvm_msr_energy_thread_init(KVMState *s, MachineState *ms) 2987 { 2988 MachineClass *mc = MACHINE_GET_CLASS(ms); 2989 struct KVMMsrEnergy *r = &s->msr_energy; 2990 2991 /* 2992 * Sanity check 2993 * 1. Host cpu must be Intel cpu 2994 * 2. RAPL must be enabled on the Host 2995 */ 2996 if (!is_host_cpu_intel()) { 2997 error_report("The RAPL feature can only be enabled on hosts " 2998 "with Intel CPU models"); 2999 return -1; 3000 } 3001 3002 if (!is_rapl_enabled()) { 3003 return -1; 3004 } 3005 3006 /* Retrieve the virtual topology */ 3007 vmsr_init_topo_info(&r->guest_topo_info, ms); 3008 3009 /* Retrieve the number of vcpu */ 3010 r->guest_vcpus = ms->smp.cpus; 3011 3012 /* Retrieve the number of virtual sockets */ 3013 r->guest_vsockets = ms->smp.sockets; 3014 3015 /* Allocate register memory (MSR_PKG_STATUS) for each vcpu */ 3016 r->msr_value = g_new0(uint64_t, r->guest_vcpus); 3017 3018 /* Retrieve the CPUArchIDlist */ 3019 r->guest_cpu_list = mc->possible_cpu_arch_ids(ms); 3020 3021 /* Max number of cpus on the Host */ 3022 r->host_topo.maxcpus = vmsr_get_maxcpus(); 3023 if (r->host_topo.maxcpus == 0) { 3024 error_report("host max cpus = 0"); 3025 return -1; 3026 } 3027 3028 /* Max number of packages on the host */ 3029 r->host_topo.maxpkgs = vmsr_get_max_physical_package(r->host_topo.maxcpus); 3030 if (r->host_topo.maxpkgs == 0) { 3031 error_report("host max pkgs = 0"); 3032 return -1; 3033 } 3034 3035 /* Allocate memory for each package on the host */ 3036 r->host_topo.pkg_cpu_count = g_new0(unsigned int, r->host_topo.maxpkgs); 3037 r->host_topo.maxticks = g_new0(unsigned int, r->host_topo.maxpkgs); 3038 3039 vmsr_count_cpus_per_package(r->host_topo.pkg_cpu_count, 3040 r->host_topo.maxpkgs); 3041 for (int i = 0; i < r->host_topo.maxpkgs; i++) { 3042 if (r->host_topo.pkg_cpu_count[i] == 0) { 3043 error_report("cpu per packages = 0 on package_%d", i); 3044 return -1; 3045 } 3046 } 3047 3048 /* Get QEMU PID*/ 3049 r->pid = getpid(); 3050 3051 /* Compute the socket path if necessary */ 3052 if (s->msr_energy.socket_path == NULL) { 3053 s->msr_energy.socket_path = vmsr_compute_default_paths(); 3054 } 3055 3056 /* Open socket with vmsr helper */ 3057 s->msr_energy.sioc = vmsr_open_socket(s->msr_energy.socket_path); 3058 3059 if (s->msr_energy.sioc == NULL) { 3060 error_report("vmsr socket opening failed"); 3061 return -1; 3062 } 3063 3064 /* Those MSR values should not change */ 3065 r->msr_unit = vmsr_read_msr(MSR_RAPL_POWER_UNIT, 0, r->pid, 3066 s->msr_energy.sioc); 3067 r->msr_limit = vmsr_read_msr(MSR_PKG_POWER_LIMIT, 0, r->pid, 3068 s->msr_energy.sioc); 3069 r->msr_info = vmsr_read_msr(MSR_PKG_POWER_INFO, 0, r->pid, 3070 s->msr_energy.sioc); 3071 if (r->msr_unit == 0 || r->msr_limit == 0 || r->msr_info == 0) { 3072 error_report("can't read any virtual msr"); 3073 return -1; 3074 } 3075 3076 qemu_thread_create(&r->msr_thr, "kvm-msr", 3077 kvm_msr_energy_thread, 3078 s, QEMU_THREAD_JOINABLE); 3079 return 0; 3080 } 3081 3082 int kvm_arch_get_default_type(MachineState *ms) 3083 { 3084 return 0; 3085 } 3086 3087 static int kvm_vm_enable_exception_payload(KVMState *s) 3088 { 3089 int ret = 0; 3090 has_exception_payload = kvm_check_extension(s, KVM_CAP_EXCEPTION_PAYLOAD); 3091 if (has_exception_payload) { 3092 ret = kvm_vm_enable_cap(s, KVM_CAP_EXCEPTION_PAYLOAD, 0, true); 3093 if (ret < 0) { 3094 error_report("kvm: Failed to enable exception payload cap: %s", 3095 strerror(-ret)); 3096 } 3097 } 3098 3099 return ret; 3100 } 3101 3102 static int kvm_vm_enable_triple_fault_event(KVMState *s) 3103 { 3104 int ret = 0; 3105 has_triple_fault_event = \ 3106 kvm_check_extension(s, 3107 KVM_CAP_X86_TRIPLE_FAULT_EVENT); 3108 if (has_triple_fault_event) { 3109 ret = kvm_vm_enable_cap(s, KVM_CAP_X86_TRIPLE_FAULT_EVENT, 0, true); 3110 if (ret < 0) { 3111 error_report("kvm: Failed to enable triple fault event cap: %s", 3112 strerror(-ret)); 3113 } 3114 } 3115 return ret; 3116 } 3117 3118 static int kvm_vm_set_identity_map_addr(KVMState *s, uint64_t identity_base) 3119 { 3120 return kvm_vm_ioctl(s, KVM_SET_IDENTITY_MAP_ADDR, &identity_base); 3121 } 3122 3123 static int kvm_vm_set_nr_mmu_pages(KVMState *s) 3124 { 3125 uint64_t shadow_mem; 3126 int ret = 0; 3127 shadow_mem = object_property_get_int(OBJECT(s), 3128 "kvm-shadow-mem", 3129 &error_abort); 3130 if (shadow_mem != -1) { 3131 shadow_mem /= 4096; 3132 ret = kvm_vm_ioctl(s, KVM_SET_NR_MMU_PAGES, shadow_mem); 3133 } 3134 return ret; 3135 } 3136 3137 static int kvm_vm_set_tss_addr(KVMState *s, uint64_t tss_base) 3138 { 3139 return kvm_vm_ioctl(s, KVM_SET_TSS_ADDR, tss_base); 3140 } 3141 3142 static int kvm_vm_enable_disable_exits(KVMState *s) 3143 { 3144 int disable_exits = kvm_check_extension(s, KVM_CAP_X86_DISABLE_EXITS); 3145 3146 if (disable_exits) { 3147 disable_exits &= (KVM_X86_DISABLE_EXITS_MWAIT | 3148 KVM_X86_DISABLE_EXITS_HLT | 3149 KVM_X86_DISABLE_EXITS_PAUSE | 3150 KVM_X86_DISABLE_EXITS_CSTATE); 3151 } 3152 3153 return kvm_vm_enable_cap(s, KVM_CAP_X86_DISABLE_EXITS, 0, 3154 disable_exits); 3155 } 3156 3157 static int kvm_vm_enable_bus_lock_exit(KVMState *s) 3158 { 3159 int ret = 0; 3160 ret = kvm_check_extension(s, KVM_CAP_X86_BUS_LOCK_EXIT); 3161 if (!(ret & KVM_BUS_LOCK_DETECTION_EXIT)) { 3162 error_report("kvm: bus lock detection unsupported"); 3163 return -ENOTSUP; 3164 } 3165 ret = kvm_vm_enable_cap(s, KVM_CAP_X86_BUS_LOCK_EXIT, 0, 3166 KVM_BUS_LOCK_DETECTION_EXIT); 3167 if (ret < 0) { 3168 error_report("kvm: Failed to enable bus lock detection cap: %s", 3169 strerror(-ret)); 3170 } 3171 3172 return ret; 3173 } 3174 3175 static int kvm_vm_enable_notify_vmexit(KVMState *s) 3176 { 3177 int ret = 0; 3178 if (s->notify_vmexit != NOTIFY_VMEXIT_OPTION_DISABLE) { 3179 uint64_t notify_window_flags = 3180 ((uint64_t)s->notify_window << 32) | 3181 KVM_X86_NOTIFY_VMEXIT_ENABLED | 3182 KVM_X86_NOTIFY_VMEXIT_USER; 3183 ret = kvm_vm_enable_cap(s, KVM_CAP_X86_NOTIFY_VMEXIT, 0, 3184 notify_window_flags); 3185 if (ret < 0) { 3186 error_report("kvm: Failed to enable notify vmexit cap: %s", 3187 strerror(-ret)); 3188 } 3189 } 3190 return ret; 3191 } 3192 3193 static int kvm_vm_enable_userspace_msr(KVMState *s) 3194 { 3195 int ret; 3196 3197 ret = kvm_vm_enable_cap(s, KVM_CAP_X86_USER_SPACE_MSR, 0, 3198 KVM_MSR_EXIT_REASON_FILTER); 3199 if (ret < 0) { 3200 error_report("Could not enable user space MSRs: %s", 3201 strerror(-ret)); 3202 exit(1); 3203 } 3204 3205 ret = kvm_filter_msr(s, MSR_CORE_THREAD_COUNT, 3206 kvm_rdmsr_core_thread_count, NULL); 3207 if (ret < 0) { 3208 error_report("Could not install MSR_CORE_THREAD_COUNT handler: %s", 3209 strerror(-ret)); 3210 exit(1); 3211 } 3212 3213 return 0; 3214 } 3215 3216 static int kvm_vm_enable_energy_msrs(KVMState *s) 3217 { 3218 int ret; 3219 3220 if (s->msr_energy.enable == true) { 3221 ret = kvm_filter_msr(s, MSR_RAPL_POWER_UNIT, 3222 kvm_rdmsr_rapl_power_unit, NULL); 3223 if (ret < 0) { 3224 error_report("Could not install MSR_RAPL_POWER_UNIT handler: %s", 3225 strerror(-ret)); 3226 return ret; 3227 } 3228 3229 ret = kvm_filter_msr(s, MSR_PKG_POWER_LIMIT, 3230 kvm_rdmsr_pkg_power_limit, NULL); 3231 if (ret < 0) { 3232 error_report("Could not install MSR_PKG_POWER_LIMIT handler: %s", 3233 strerror(-ret)); 3234 return ret; 3235 } 3236 3237 ret = kvm_filter_msr(s, MSR_PKG_POWER_INFO, 3238 kvm_rdmsr_pkg_power_info, NULL); 3239 if (ret < 0) { 3240 error_report("Could not install MSR_PKG_POWER_INFO handler: %s", 3241 strerror(-ret)); 3242 return ret; 3243 } 3244 ret = kvm_filter_msr(s, MSR_PKG_ENERGY_STATUS, 3245 kvm_rdmsr_pkg_energy_status, NULL); 3246 if (ret < 0) { 3247 error_report("Could not install MSR_PKG_ENERGY_STATUS handler: %s", 3248 strerror(-ret)); 3249 return ret; 3250 } 3251 } 3252 return 0; 3253 } 3254 3255 int kvm_arch_init(MachineState *ms, KVMState *s) 3256 { 3257 int ret; 3258 struct utsname utsname; 3259 Error *local_err = NULL; 3260 3261 /* 3262 * Initialize confidential guest (SEV/TDX) context, if required 3263 */ 3264 if (ms->cgs) { 3265 ret = confidential_guest_kvm_init(ms->cgs, &local_err); 3266 if (ret < 0) { 3267 error_report_err(local_err); 3268 return ret; 3269 } 3270 } 3271 3272 has_xcrs = kvm_check_extension(s, KVM_CAP_XCRS); 3273 has_sregs2 = kvm_check_extension(s, KVM_CAP_SREGS2) > 0; 3274 3275 hv_vpindex_settable = kvm_check_extension(s, KVM_CAP_HYPERV_VP_INDEX); 3276 3277 ret = kvm_vm_enable_exception_payload(s); 3278 if (ret < 0) { 3279 return ret; 3280 } 3281 3282 ret = kvm_vm_enable_triple_fault_event(s); 3283 if (ret < 0) { 3284 return ret; 3285 } 3286 3287 if (s->xen_version) { 3288 #ifdef CONFIG_XEN_EMU 3289 if (!object_dynamic_cast(OBJECT(ms), TYPE_PC_MACHINE)) { 3290 error_report("kvm: Xen support only available in PC machine"); 3291 return -ENOTSUP; 3292 } 3293 /* hyperv_enabled() doesn't work yet. */ 3294 uint32_t msr = XEN_HYPERCALL_MSR; 3295 ret = kvm_xen_init(s, msr); 3296 if (ret < 0) { 3297 return ret; 3298 } 3299 #else 3300 error_report("kvm: Xen support not enabled in qemu"); 3301 return -ENOTSUP; 3302 #endif 3303 } 3304 3305 ret = kvm_get_supported_msrs(s); 3306 if (ret < 0) { 3307 return ret; 3308 } 3309 3310 ret = kvm_get_supported_feature_msrs(s); 3311 if (ret < 0) { 3312 return ret; 3313 } 3314 3315 uname(&utsname); 3316 lm_capable_kernel = strcmp(utsname.machine, "x86_64") == 0; 3317 3318 ret = kvm_vm_set_identity_map_addr(s, KVM_IDENTITY_BASE); 3319 if (ret < 0) { 3320 return ret; 3321 } 3322 3323 /* Set TSS base one page after EPT identity map. */ 3324 ret = kvm_vm_set_tss_addr(s, KVM_IDENTITY_BASE + 0x1000); 3325 if (ret < 0) { 3326 return ret; 3327 } 3328 3329 /* Tell fw_cfg to notify the BIOS to reserve the range. */ 3330 e820_add_entry(KVM_IDENTITY_BASE, 0x4000, E820_RESERVED); 3331 3332 ret = kvm_vm_set_nr_mmu_pages(s); 3333 if (ret < 0) { 3334 return ret; 3335 } 3336 3337 if (kvm_check_extension(s, KVM_CAP_X86_SMM) && 3338 object_dynamic_cast(OBJECT(ms), TYPE_X86_MACHINE) && 3339 x86_machine_is_smm_enabled(X86_MACHINE(ms))) { 3340 smram_machine_done.notify = register_smram_listener; 3341 qemu_add_machine_init_done_notifier(&smram_machine_done); 3342 } 3343 3344 if (enable_cpu_pm) { 3345 ret = kvm_vm_enable_disable_exits(s); 3346 if (ret < 0) { 3347 error_report("kvm: guest stopping CPU not supported: %s", 3348 strerror(-ret)); 3349 return ret; 3350 } 3351 } 3352 3353 if (object_dynamic_cast(OBJECT(ms), TYPE_X86_MACHINE)) { 3354 X86MachineState *x86ms = X86_MACHINE(ms); 3355 3356 if (x86ms->bus_lock_ratelimit > 0) { 3357 ret = kvm_vm_enable_bus_lock_exit(s); 3358 if (ret < 0) { 3359 return ret; 3360 } 3361 ratelimit_init(&bus_lock_ratelimit_ctrl); 3362 ratelimit_set_speed(&bus_lock_ratelimit_ctrl, 3363 x86ms->bus_lock_ratelimit, BUS_LOCK_SLICE_TIME); 3364 } 3365 } 3366 3367 if (kvm_check_extension(s, KVM_CAP_X86_NOTIFY_VMEXIT)) { 3368 ret = kvm_vm_enable_notify_vmexit(s); 3369 if (ret < 0) { 3370 return ret; 3371 } 3372 } 3373 3374 if (kvm_vm_check_extension(s, KVM_CAP_X86_USER_SPACE_MSR)) { 3375 ret = kvm_vm_enable_userspace_msr(s); 3376 if (ret < 0) { 3377 return ret; 3378 } 3379 3380 if (s->msr_energy.enable == true) { 3381 ret = kvm_vm_enable_energy_msrs(s); 3382 if (ret < 0) { 3383 return ret; 3384 } 3385 3386 ret = kvm_msr_energy_thread_init(s, ms); 3387 if (ret < 0) { 3388 error_report("kvm : error RAPL feature requirement not met"); 3389 return ret; 3390 } 3391 } 3392 } 3393 3394 return 0; 3395 } 3396 3397 static void set_v8086_seg(struct kvm_segment *lhs, const SegmentCache *rhs) 3398 { 3399 lhs->selector = rhs->selector; 3400 lhs->base = rhs->base; 3401 lhs->limit = rhs->limit; 3402 lhs->type = 3; 3403 lhs->present = 1; 3404 lhs->dpl = 3; 3405 lhs->db = 0; 3406 lhs->s = 1; 3407 lhs->l = 0; 3408 lhs->g = 0; 3409 lhs->avl = 0; 3410 lhs->unusable = 0; 3411 } 3412 3413 static void set_seg(struct kvm_segment *lhs, const SegmentCache *rhs) 3414 { 3415 unsigned flags = rhs->flags; 3416 lhs->selector = rhs->selector; 3417 lhs->base = rhs->base; 3418 lhs->limit = rhs->limit; 3419 lhs->type = (flags >> DESC_TYPE_SHIFT) & 15; 3420 lhs->present = (flags & DESC_P_MASK) != 0; 3421 lhs->dpl = (flags >> DESC_DPL_SHIFT) & 3; 3422 lhs->db = (flags >> DESC_B_SHIFT) & 1; 3423 lhs->s = (flags & DESC_S_MASK) != 0; 3424 lhs->l = (flags >> DESC_L_SHIFT) & 1; 3425 lhs->g = (flags & DESC_G_MASK) != 0; 3426 lhs->avl = (flags & DESC_AVL_MASK) != 0; 3427 lhs->unusable = !lhs->present; 3428 lhs->padding = 0; 3429 } 3430 3431 static void get_seg(SegmentCache *lhs, const struct kvm_segment *rhs) 3432 { 3433 lhs->selector = rhs->selector; 3434 lhs->base = rhs->base; 3435 lhs->limit = rhs->limit; 3436 lhs->flags = (rhs->type << DESC_TYPE_SHIFT) | 3437 ((rhs->present && !rhs->unusable) * DESC_P_MASK) | 3438 (rhs->dpl << DESC_DPL_SHIFT) | 3439 (rhs->db << DESC_B_SHIFT) | 3440 (rhs->s * DESC_S_MASK) | 3441 (rhs->l << DESC_L_SHIFT) | 3442 (rhs->g * DESC_G_MASK) | 3443 (rhs->avl * DESC_AVL_MASK); 3444 } 3445 3446 static void kvm_getput_reg(__u64 *kvm_reg, target_ulong *qemu_reg, int set) 3447 { 3448 if (set) { 3449 *kvm_reg = *qemu_reg; 3450 } else { 3451 *qemu_reg = *kvm_reg; 3452 } 3453 } 3454 3455 static int kvm_getput_regs(X86CPU *cpu, int set) 3456 { 3457 CPUX86State *env = &cpu->env; 3458 struct kvm_regs regs; 3459 int ret = 0; 3460 3461 if (!set) { 3462 ret = kvm_vcpu_ioctl(CPU(cpu), KVM_GET_REGS, ®s); 3463 if (ret < 0) { 3464 return ret; 3465 } 3466 } 3467 3468 kvm_getput_reg(®s.rax, &env->regs[R_EAX], set); 3469 kvm_getput_reg(®s.rbx, &env->regs[R_EBX], set); 3470 kvm_getput_reg(®s.rcx, &env->regs[R_ECX], set); 3471 kvm_getput_reg(®s.rdx, &env->regs[R_EDX], set); 3472 kvm_getput_reg(®s.rsi, &env->regs[R_ESI], set); 3473 kvm_getput_reg(®s.rdi, &env->regs[R_EDI], set); 3474 kvm_getput_reg(®s.rsp, &env->regs[R_ESP], set); 3475 kvm_getput_reg(®s.rbp, &env->regs[R_EBP], set); 3476 #ifdef TARGET_X86_64 3477 kvm_getput_reg(®s.r8, &env->regs[8], set); 3478 kvm_getput_reg(®s.r9, &env->regs[9], set); 3479 kvm_getput_reg(®s.r10, &env->regs[10], set); 3480 kvm_getput_reg(®s.r11, &env->regs[11], set); 3481 kvm_getput_reg(®s.r12, &env->regs[12], set); 3482 kvm_getput_reg(®s.r13, &env->regs[13], set); 3483 kvm_getput_reg(®s.r14, &env->regs[14], set); 3484 kvm_getput_reg(®s.r15, &env->regs[15], set); 3485 #endif 3486 3487 kvm_getput_reg(®s.rflags, &env->eflags, set); 3488 kvm_getput_reg(®s.rip, &env->eip, set); 3489 3490 if (set) { 3491 ret = kvm_vcpu_ioctl(CPU(cpu), KVM_SET_REGS, ®s); 3492 } 3493 3494 return ret; 3495 } 3496 3497 static int kvm_put_xsave(X86CPU *cpu) 3498 { 3499 CPUX86State *env = &cpu->env; 3500 void *xsave = env->xsave_buf; 3501 3502 x86_cpu_xsave_all_areas(cpu, xsave, env->xsave_buf_len); 3503 3504 return kvm_vcpu_ioctl(CPU(cpu), KVM_SET_XSAVE, xsave); 3505 } 3506 3507 static int kvm_put_xcrs(X86CPU *cpu) 3508 { 3509 CPUX86State *env = &cpu->env; 3510 struct kvm_xcrs xcrs = {}; 3511 3512 if (!has_xcrs) { 3513 return 0; 3514 } 3515 3516 xcrs.nr_xcrs = 1; 3517 xcrs.flags = 0; 3518 xcrs.xcrs[0].xcr = 0; 3519 xcrs.xcrs[0].value = env->xcr0; 3520 return kvm_vcpu_ioctl(CPU(cpu), KVM_SET_XCRS, &xcrs); 3521 } 3522 3523 static int kvm_put_sregs(X86CPU *cpu) 3524 { 3525 CPUX86State *env = &cpu->env; 3526 struct kvm_sregs sregs; 3527 3528 /* 3529 * The interrupt_bitmap is ignored because KVM_SET_SREGS is 3530 * always followed by KVM_SET_VCPU_EVENTS. 3531 */ 3532 memset(sregs.interrupt_bitmap, 0, sizeof(sregs.interrupt_bitmap)); 3533 3534 if ((env->eflags & VM_MASK)) { 3535 set_v8086_seg(&sregs.cs, &env->segs[R_CS]); 3536 set_v8086_seg(&sregs.ds, &env->segs[R_DS]); 3537 set_v8086_seg(&sregs.es, &env->segs[R_ES]); 3538 set_v8086_seg(&sregs.fs, &env->segs[R_FS]); 3539 set_v8086_seg(&sregs.gs, &env->segs[R_GS]); 3540 set_v8086_seg(&sregs.ss, &env->segs[R_SS]); 3541 } else { 3542 set_seg(&sregs.cs, &env->segs[R_CS]); 3543 set_seg(&sregs.ds, &env->segs[R_DS]); 3544 set_seg(&sregs.es, &env->segs[R_ES]); 3545 set_seg(&sregs.fs, &env->segs[R_FS]); 3546 set_seg(&sregs.gs, &env->segs[R_GS]); 3547 set_seg(&sregs.ss, &env->segs[R_SS]); 3548 } 3549 3550 set_seg(&sregs.tr, &env->tr); 3551 set_seg(&sregs.ldt, &env->ldt); 3552 3553 sregs.idt.limit = env->idt.limit; 3554 sregs.idt.base = env->idt.base; 3555 memset(sregs.idt.padding, 0, sizeof sregs.idt.padding); 3556 sregs.gdt.limit = env->gdt.limit; 3557 sregs.gdt.base = env->gdt.base; 3558 memset(sregs.gdt.padding, 0, sizeof sregs.gdt.padding); 3559 3560 sregs.cr0 = env->cr[0]; 3561 sregs.cr2 = env->cr[2]; 3562 sregs.cr3 = env->cr[3]; 3563 sregs.cr4 = env->cr[4]; 3564 3565 sregs.cr8 = cpu_get_apic_tpr(cpu->apic_state); 3566 sregs.apic_base = cpu_get_apic_base(cpu->apic_state); 3567 3568 sregs.efer = env->efer; 3569 3570 return kvm_vcpu_ioctl(CPU(cpu), KVM_SET_SREGS, &sregs); 3571 } 3572 3573 static int kvm_put_sregs2(X86CPU *cpu) 3574 { 3575 CPUX86State *env = &cpu->env; 3576 struct kvm_sregs2 sregs; 3577 int i; 3578 3579 sregs.flags = 0; 3580 3581 if ((env->eflags & VM_MASK)) { 3582 set_v8086_seg(&sregs.cs, &env->segs[R_CS]); 3583 set_v8086_seg(&sregs.ds, &env->segs[R_DS]); 3584 set_v8086_seg(&sregs.es, &env->segs[R_ES]); 3585 set_v8086_seg(&sregs.fs, &env->segs[R_FS]); 3586 set_v8086_seg(&sregs.gs, &env->segs[R_GS]); 3587 set_v8086_seg(&sregs.ss, &env->segs[R_SS]); 3588 } else { 3589 set_seg(&sregs.cs, &env->segs[R_CS]); 3590 set_seg(&sregs.ds, &env->segs[R_DS]); 3591 set_seg(&sregs.es, &env->segs[R_ES]); 3592 set_seg(&sregs.fs, &env->segs[R_FS]); 3593 set_seg(&sregs.gs, &env->segs[R_GS]); 3594 set_seg(&sregs.ss, &env->segs[R_SS]); 3595 } 3596 3597 set_seg(&sregs.tr, &env->tr); 3598 set_seg(&sregs.ldt, &env->ldt); 3599 3600 sregs.idt.limit = env->idt.limit; 3601 sregs.idt.base = env->idt.base; 3602 memset(sregs.idt.padding, 0, sizeof sregs.idt.padding); 3603 sregs.gdt.limit = env->gdt.limit; 3604 sregs.gdt.base = env->gdt.base; 3605 memset(sregs.gdt.padding, 0, sizeof sregs.gdt.padding); 3606 3607 sregs.cr0 = env->cr[0]; 3608 sregs.cr2 = env->cr[2]; 3609 sregs.cr3 = env->cr[3]; 3610 sregs.cr4 = env->cr[4]; 3611 3612 sregs.cr8 = cpu_get_apic_tpr(cpu->apic_state); 3613 sregs.apic_base = cpu_get_apic_base(cpu->apic_state); 3614 3615 sregs.efer = env->efer; 3616 3617 if (env->pdptrs_valid) { 3618 for (i = 0; i < 4; i++) { 3619 sregs.pdptrs[i] = env->pdptrs[i]; 3620 } 3621 sregs.flags |= KVM_SREGS2_FLAGS_PDPTRS_VALID; 3622 } 3623 3624 return kvm_vcpu_ioctl(CPU(cpu), KVM_SET_SREGS2, &sregs); 3625 } 3626 3627 3628 static void kvm_msr_buf_reset(X86CPU *cpu) 3629 { 3630 memset(cpu->kvm_msr_buf, 0, MSR_BUF_SIZE); 3631 } 3632 3633 static void kvm_msr_entry_add(X86CPU *cpu, uint32_t index, uint64_t value) 3634 { 3635 struct kvm_msrs *msrs = cpu->kvm_msr_buf; 3636 void *limit = ((void *)msrs) + MSR_BUF_SIZE; 3637 struct kvm_msr_entry *entry = &msrs->entries[msrs->nmsrs]; 3638 3639 assert((void *)(entry + 1) <= limit); 3640 3641 entry->index = index; 3642 entry->reserved = 0; 3643 entry->data = value; 3644 msrs->nmsrs++; 3645 } 3646 3647 static int kvm_put_one_msr(X86CPU *cpu, int index, uint64_t value) 3648 { 3649 kvm_msr_buf_reset(cpu); 3650 kvm_msr_entry_add(cpu, index, value); 3651 3652 return kvm_vcpu_ioctl(CPU(cpu), KVM_SET_MSRS, cpu->kvm_msr_buf); 3653 } 3654 3655 static int kvm_get_one_msr(X86CPU *cpu, int index, uint64_t *value) 3656 { 3657 int ret; 3658 struct { 3659 struct kvm_msrs info; 3660 struct kvm_msr_entry entries[1]; 3661 } msr_data = { 3662 .info.nmsrs = 1, 3663 .entries[0].index = index, 3664 }; 3665 3666 ret = kvm_vcpu_ioctl(CPU(cpu), KVM_GET_MSRS, &msr_data); 3667 if (ret < 0) { 3668 return ret; 3669 } 3670 assert(ret == 1); 3671 *value = msr_data.entries[0].data; 3672 return ret; 3673 } 3674 void kvm_put_apicbase(X86CPU *cpu, uint64_t value) 3675 { 3676 int ret; 3677 3678 ret = kvm_put_one_msr(cpu, MSR_IA32_APICBASE, value); 3679 assert(ret == 1); 3680 } 3681 3682 static int kvm_put_tscdeadline_msr(X86CPU *cpu) 3683 { 3684 CPUX86State *env = &cpu->env; 3685 int ret; 3686 3687 if (!has_msr_tsc_deadline) { 3688 return 0; 3689 } 3690 3691 ret = kvm_put_one_msr(cpu, MSR_IA32_TSCDEADLINE, env->tsc_deadline); 3692 if (ret < 0) { 3693 return ret; 3694 } 3695 3696 assert(ret == 1); 3697 return 0; 3698 } 3699 3700 /* 3701 * Provide a separate write service for the feature control MSR in order to 3702 * kick the VCPU out of VMXON or even guest mode on reset. This has to be done 3703 * before writing any other state because forcibly leaving nested mode 3704 * invalidates the VCPU state. 3705 */ 3706 static int kvm_put_msr_feature_control(X86CPU *cpu) 3707 { 3708 int ret; 3709 3710 if (!has_msr_feature_control) { 3711 return 0; 3712 } 3713 3714 ret = kvm_put_one_msr(cpu, MSR_IA32_FEATURE_CONTROL, 3715 cpu->env.msr_ia32_feature_control); 3716 if (ret < 0) { 3717 return ret; 3718 } 3719 3720 assert(ret == 1); 3721 return 0; 3722 } 3723 3724 static uint64_t make_vmx_msr_value(uint32_t index, uint32_t features) 3725 { 3726 uint32_t default1, can_be_one, can_be_zero; 3727 uint32_t must_be_one; 3728 3729 switch (index) { 3730 case MSR_IA32_VMX_TRUE_PINBASED_CTLS: 3731 default1 = 0x00000016; 3732 break; 3733 case MSR_IA32_VMX_TRUE_PROCBASED_CTLS: 3734 default1 = 0x0401e172; 3735 break; 3736 case MSR_IA32_VMX_TRUE_ENTRY_CTLS: 3737 default1 = 0x000011ff; 3738 break; 3739 case MSR_IA32_VMX_TRUE_EXIT_CTLS: 3740 default1 = 0x00036dff; 3741 break; 3742 case MSR_IA32_VMX_PROCBASED_CTLS2: 3743 default1 = 0; 3744 break; 3745 default: 3746 abort(); 3747 } 3748 3749 /* If a feature bit is set, the control can be either set or clear. 3750 * Otherwise the value is limited to either 0 or 1 by default1. 3751 */ 3752 can_be_one = features | default1; 3753 can_be_zero = features | ~default1; 3754 must_be_one = ~can_be_zero; 3755 3756 /* 3757 * Bit 0:31 -> 0 if the control bit can be zero (i.e. 1 if it must be one). 3758 * Bit 32:63 -> 1 if the control bit can be one. 3759 */ 3760 return must_be_one | (((uint64_t)can_be_one) << 32); 3761 } 3762 3763 static void kvm_msr_entry_add_vmx(X86CPU *cpu, FeatureWordArray f) 3764 { 3765 uint64_t kvm_vmx_basic = 3766 kvm_arch_get_supported_msr_feature(kvm_state, 3767 MSR_IA32_VMX_BASIC); 3768 3769 if (!kvm_vmx_basic) { 3770 /* If the kernel doesn't support VMX feature (kvm_intel.nested=0), 3771 * then kvm_vmx_basic will be 0 and KVM_SET_MSR will fail. 3772 */ 3773 return; 3774 } 3775 3776 uint64_t kvm_vmx_misc = 3777 kvm_arch_get_supported_msr_feature(kvm_state, 3778 MSR_IA32_VMX_MISC); 3779 uint64_t kvm_vmx_ept_vpid = 3780 kvm_arch_get_supported_msr_feature(kvm_state, 3781 MSR_IA32_VMX_EPT_VPID_CAP); 3782 3783 /* 3784 * If the guest is 64-bit, a value of 1 is allowed for the host address 3785 * space size vmexit control. 3786 */ 3787 uint64_t fixed_vmx_exit = f[FEAT_8000_0001_EDX] & CPUID_EXT2_LM 3788 ? (uint64_t)VMX_VM_EXIT_HOST_ADDR_SPACE_SIZE << 32 : 0; 3789 3790 /* 3791 * Bits 0-30, 32-44 and 50-53 come from the host. KVM should 3792 * not change them for backwards compatibility. 3793 */ 3794 uint64_t fixed_vmx_basic = kvm_vmx_basic & 3795 (MSR_VMX_BASIC_VMCS_REVISION_MASK | 3796 MSR_VMX_BASIC_VMXON_REGION_SIZE_MASK | 3797 MSR_VMX_BASIC_VMCS_MEM_TYPE_MASK); 3798 3799 /* 3800 * Same for bits 0-4 and 25-27. Bits 16-24 (CR3 target count) can 3801 * change in the future but are always zero for now, clear them to be 3802 * future proof. Bits 32-63 in theory could change, though KVM does 3803 * not support dual-monitor treatment and probably never will; mask 3804 * them out as well. 3805 */ 3806 uint64_t fixed_vmx_misc = kvm_vmx_misc & 3807 (MSR_VMX_MISC_PREEMPTION_TIMER_SHIFT_MASK | 3808 MSR_VMX_MISC_MAX_MSR_LIST_SIZE_MASK); 3809 3810 /* 3811 * EPT memory types should not change either, so we do not bother 3812 * adding features for them. 3813 */ 3814 uint64_t fixed_vmx_ept_mask = 3815 (f[FEAT_VMX_SECONDARY_CTLS] & VMX_SECONDARY_EXEC_ENABLE_EPT ? 3816 MSR_VMX_EPT_UC | MSR_VMX_EPT_WB : 0); 3817 uint64_t fixed_vmx_ept_vpid = kvm_vmx_ept_vpid & fixed_vmx_ept_mask; 3818 3819 kvm_msr_entry_add(cpu, MSR_IA32_VMX_TRUE_PROCBASED_CTLS, 3820 make_vmx_msr_value(MSR_IA32_VMX_TRUE_PROCBASED_CTLS, 3821 f[FEAT_VMX_PROCBASED_CTLS])); 3822 kvm_msr_entry_add(cpu, MSR_IA32_VMX_TRUE_PINBASED_CTLS, 3823 make_vmx_msr_value(MSR_IA32_VMX_TRUE_PINBASED_CTLS, 3824 f[FEAT_VMX_PINBASED_CTLS])); 3825 kvm_msr_entry_add(cpu, MSR_IA32_VMX_TRUE_EXIT_CTLS, 3826 make_vmx_msr_value(MSR_IA32_VMX_TRUE_EXIT_CTLS, 3827 f[FEAT_VMX_EXIT_CTLS]) | fixed_vmx_exit); 3828 kvm_msr_entry_add(cpu, MSR_IA32_VMX_TRUE_ENTRY_CTLS, 3829 make_vmx_msr_value(MSR_IA32_VMX_TRUE_ENTRY_CTLS, 3830 f[FEAT_VMX_ENTRY_CTLS])); 3831 kvm_msr_entry_add(cpu, MSR_IA32_VMX_PROCBASED_CTLS2, 3832 make_vmx_msr_value(MSR_IA32_VMX_PROCBASED_CTLS2, 3833 f[FEAT_VMX_SECONDARY_CTLS])); 3834 kvm_msr_entry_add(cpu, MSR_IA32_VMX_EPT_VPID_CAP, 3835 f[FEAT_VMX_EPT_VPID_CAPS] | fixed_vmx_ept_vpid); 3836 kvm_msr_entry_add(cpu, MSR_IA32_VMX_BASIC, 3837 f[FEAT_VMX_BASIC] | fixed_vmx_basic); 3838 kvm_msr_entry_add(cpu, MSR_IA32_VMX_MISC, 3839 f[FEAT_VMX_MISC] | fixed_vmx_misc); 3840 if (has_msr_vmx_vmfunc) { 3841 kvm_msr_entry_add(cpu, MSR_IA32_VMX_VMFUNC, f[FEAT_VMX_VMFUNC]); 3842 } 3843 3844 /* 3845 * Just to be safe, write these with constant values. The CRn_FIXED1 3846 * MSRs are generated by KVM based on the vCPU's CPUID. 3847 */ 3848 kvm_msr_entry_add(cpu, MSR_IA32_VMX_CR0_FIXED0, 3849 CR0_PE_MASK | CR0_PG_MASK | CR0_NE_MASK); 3850 kvm_msr_entry_add(cpu, MSR_IA32_VMX_CR4_FIXED0, 3851 CR4_VMXE_MASK); 3852 3853 if (f[FEAT_7_1_EAX] & CPUID_7_1_EAX_FRED) { 3854 /* FRED injected-event data (0x2052). */ 3855 kvm_msr_entry_add(cpu, MSR_IA32_VMX_VMCS_ENUM, 0x52); 3856 } else if (f[FEAT_VMX_EXIT_CTLS] & 3857 VMX_VM_EXIT_ACTIVATE_SECONDARY_CONTROLS) { 3858 /* Secondary VM-exit controls (0x2044). */ 3859 kvm_msr_entry_add(cpu, MSR_IA32_VMX_VMCS_ENUM, 0x44); 3860 } else if (f[FEAT_VMX_SECONDARY_CTLS] & VMX_SECONDARY_EXEC_TSC_SCALING) { 3861 /* TSC multiplier (0x2032). */ 3862 kvm_msr_entry_add(cpu, MSR_IA32_VMX_VMCS_ENUM, 0x32); 3863 } else { 3864 /* Preemption timer (0x482E). */ 3865 kvm_msr_entry_add(cpu, MSR_IA32_VMX_VMCS_ENUM, 0x2E); 3866 } 3867 } 3868 3869 static void kvm_msr_entry_add_perf(X86CPU *cpu, FeatureWordArray f) 3870 { 3871 uint64_t kvm_perf_cap = 3872 kvm_arch_get_supported_msr_feature(kvm_state, 3873 MSR_IA32_PERF_CAPABILITIES); 3874 3875 if (kvm_perf_cap) { 3876 kvm_msr_entry_add(cpu, MSR_IA32_PERF_CAPABILITIES, 3877 kvm_perf_cap & f[FEAT_PERF_CAPABILITIES]); 3878 } 3879 } 3880 3881 static int kvm_buf_set_msrs(X86CPU *cpu) 3882 { 3883 int ret = kvm_vcpu_ioctl(CPU(cpu), KVM_SET_MSRS, cpu->kvm_msr_buf); 3884 if (ret < 0) { 3885 return ret; 3886 } 3887 3888 if (ret < cpu->kvm_msr_buf->nmsrs) { 3889 struct kvm_msr_entry *e = &cpu->kvm_msr_buf->entries[ret]; 3890 error_report("error: failed to set MSR 0x%" PRIx32 " to 0x%" PRIx64, 3891 (uint32_t)e->index, (uint64_t)e->data); 3892 } 3893 3894 assert(ret == cpu->kvm_msr_buf->nmsrs); 3895 return 0; 3896 } 3897 3898 static void kvm_init_msrs(X86CPU *cpu) 3899 { 3900 CPUX86State *env = &cpu->env; 3901 3902 kvm_msr_buf_reset(cpu); 3903 3904 if (!is_tdx_vm()) { 3905 if (has_msr_arch_capabs) { 3906 kvm_msr_entry_add(cpu, MSR_IA32_ARCH_CAPABILITIES, 3907 env->features[FEAT_ARCH_CAPABILITIES]); 3908 } 3909 3910 if (has_msr_core_capabs) { 3911 kvm_msr_entry_add(cpu, MSR_IA32_CORE_CAPABILITY, 3912 env->features[FEAT_CORE_CAPABILITY]); 3913 } 3914 3915 if (has_msr_perf_capabs && cpu->enable_pmu) { 3916 kvm_msr_entry_add_perf(cpu, env->features); 3917 } 3918 3919 /* 3920 * Older kernels do not include VMX MSRs in KVM_GET_MSR_INDEX_LIST, but 3921 * all kernels with MSR features should have them. 3922 */ 3923 if (kvm_feature_msrs && cpu_has_vmx(env)) { 3924 kvm_msr_entry_add_vmx(cpu, env->features); 3925 } 3926 } 3927 3928 if (has_msr_ucode_rev) { 3929 kvm_msr_entry_add(cpu, MSR_IA32_UCODE_REV, cpu->ucode_rev); 3930 } 3931 assert(kvm_buf_set_msrs(cpu) == 0); 3932 } 3933 3934 static int kvm_put_msrs(X86CPU *cpu, int level) 3935 { 3936 CPUX86State *env = &cpu->env; 3937 int i; 3938 3939 kvm_msr_buf_reset(cpu); 3940 3941 kvm_msr_entry_add(cpu, MSR_IA32_SYSENTER_CS, env->sysenter_cs); 3942 kvm_msr_entry_add(cpu, MSR_IA32_SYSENTER_ESP, env->sysenter_esp); 3943 kvm_msr_entry_add(cpu, MSR_IA32_SYSENTER_EIP, env->sysenter_eip); 3944 kvm_msr_entry_add(cpu, MSR_PAT, env->pat); 3945 if (has_msr_star) { 3946 kvm_msr_entry_add(cpu, MSR_STAR, env->star); 3947 } 3948 if (has_msr_hsave_pa) { 3949 kvm_msr_entry_add(cpu, MSR_VM_HSAVE_PA, env->vm_hsave); 3950 } 3951 if (has_msr_tsc_aux) { 3952 kvm_msr_entry_add(cpu, MSR_TSC_AUX, env->tsc_aux); 3953 } 3954 if (has_msr_tsc_adjust) { 3955 kvm_msr_entry_add(cpu, MSR_TSC_ADJUST, env->tsc_adjust); 3956 } 3957 if (has_msr_misc_enable) { 3958 kvm_msr_entry_add(cpu, MSR_IA32_MISC_ENABLE, 3959 env->msr_ia32_misc_enable); 3960 } 3961 if (has_msr_smbase) { 3962 kvm_msr_entry_add(cpu, MSR_IA32_SMBASE, env->smbase); 3963 } 3964 if (has_msr_smi_count) { 3965 kvm_msr_entry_add(cpu, MSR_SMI_COUNT, env->msr_smi_count); 3966 } 3967 if (has_msr_pkrs) { 3968 kvm_msr_entry_add(cpu, MSR_IA32_PKRS, env->pkrs); 3969 } 3970 if (has_msr_bndcfgs) { 3971 kvm_msr_entry_add(cpu, MSR_IA32_BNDCFGS, env->msr_bndcfgs); 3972 } 3973 if (has_msr_xss) { 3974 kvm_msr_entry_add(cpu, MSR_IA32_XSS, env->xss); 3975 } 3976 if (has_msr_umwait) { 3977 kvm_msr_entry_add(cpu, MSR_IA32_UMWAIT_CONTROL, env->umwait); 3978 } 3979 if (has_msr_spec_ctrl) { 3980 kvm_msr_entry_add(cpu, MSR_IA32_SPEC_CTRL, env->spec_ctrl); 3981 } 3982 if (has_tsc_scale_msr) { 3983 kvm_msr_entry_add(cpu, MSR_AMD64_TSC_RATIO, env->amd_tsc_scale_msr); 3984 } 3985 3986 if (has_msr_tsx_ctrl) { 3987 kvm_msr_entry_add(cpu, MSR_IA32_TSX_CTRL, env->tsx_ctrl); 3988 } 3989 if (has_msr_virt_ssbd) { 3990 kvm_msr_entry_add(cpu, MSR_VIRT_SSBD, env->virt_ssbd); 3991 } 3992 if (has_msr_hwcr) { 3993 kvm_msr_entry_add(cpu, MSR_K7_HWCR, env->msr_hwcr); 3994 } 3995 3996 #ifdef TARGET_X86_64 3997 if (lm_capable_kernel) { 3998 kvm_msr_entry_add(cpu, MSR_CSTAR, env->cstar); 3999 kvm_msr_entry_add(cpu, MSR_KERNELGSBASE, env->kernelgsbase); 4000 kvm_msr_entry_add(cpu, MSR_FMASK, env->fmask); 4001 kvm_msr_entry_add(cpu, MSR_LSTAR, env->lstar); 4002 if (env->features[FEAT_7_1_EAX] & CPUID_7_1_EAX_FRED) { 4003 kvm_msr_entry_add(cpu, MSR_IA32_FRED_RSP0, env->fred_rsp0); 4004 kvm_msr_entry_add(cpu, MSR_IA32_FRED_RSP1, env->fred_rsp1); 4005 kvm_msr_entry_add(cpu, MSR_IA32_FRED_RSP2, env->fred_rsp2); 4006 kvm_msr_entry_add(cpu, MSR_IA32_FRED_RSP3, env->fred_rsp3); 4007 kvm_msr_entry_add(cpu, MSR_IA32_FRED_STKLVLS, env->fred_stklvls); 4008 kvm_msr_entry_add(cpu, MSR_IA32_FRED_SSP1, env->fred_ssp1); 4009 kvm_msr_entry_add(cpu, MSR_IA32_FRED_SSP2, env->fred_ssp2); 4010 kvm_msr_entry_add(cpu, MSR_IA32_FRED_SSP3, env->fred_ssp3); 4011 kvm_msr_entry_add(cpu, MSR_IA32_FRED_CONFIG, env->fred_config); 4012 } 4013 } 4014 #endif 4015 4016 /* 4017 * The following MSRs have side effects on the guest or are too heavy 4018 * for normal writeback. Limit them to reset or full state updates. 4019 */ 4020 if (level >= KVM_PUT_RESET_STATE) { 4021 kvm_msr_entry_add(cpu, MSR_IA32_TSC, env->tsc); 4022 if (env->features[FEAT_KVM] & (CPUID_KVM_CLOCK | CPUID_KVM_CLOCK2)) { 4023 kvm_msr_entry_add(cpu, MSR_KVM_SYSTEM_TIME, env->system_time_msr); 4024 kvm_msr_entry_add(cpu, MSR_KVM_WALL_CLOCK, env->wall_clock_msr); 4025 } 4026 if (env->features[FEAT_KVM] & CPUID_KVM_ASYNCPF_INT) { 4027 kvm_msr_entry_add(cpu, MSR_KVM_ASYNC_PF_INT, env->async_pf_int_msr); 4028 } 4029 if (env->features[FEAT_KVM] & CPUID_KVM_ASYNCPF) { 4030 kvm_msr_entry_add(cpu, MSR_KVM_ASYNC_PF_EN, env->async_pf_en_msr); 4031 } 4032 if (env->features[FEAT_KVM] & CPUID_KVM_PV_EOI) { 4033 kvm_msr_entry_add(cpu, MSR_KVM_PV_EOI_EN, env->pv_eoi_en_msr); 4034 } 4035 if (env->features[FEAT_KVM] & CPUID_KVM_STEAL_TIME) { 4036 kvm_msr_entry_add(cpu, MSR_KVM_STEAL_TIME, env->steal_time_msr); 4037 } 4038 4039 if (env->features[FEAT_KVM] & CPUID_KVM_POLL_CONTROL) { 4040 kvm_msr_entry_add(cpu, MSR_KVM_POLL_CONTROL, env->poll_control_msr); 4041 } 4042 4043 if (has_architectural_pmu_version > 0) { 4044 if (has_architectural_pmu_version > 1) { 4045 /* Stop the counter. */ 4046 kvm_msr_entry_add(cpu, MSR_CORE_PERF_FIXED_CTR_CTRL, 0); 4047 kvm_msr_entry_add(cpu, MSR_CORE_PERF_GLOBAL_CTRL, 0); 4048 } 4049 4050 /* Set the counter values. */ 4051 for (i = 0; i < num_architectural_pmu_fixed_counters; i++) { 4052 kvm_msr_entry_add(cpu, MSR_CORE_PERF_FIXED_CTR0 + i, 4053 env->msr_fixed_counters[i]); 4054 } 4055 for (i = 0; i < num_architectural_pmu_gp_counters; i++) { 4056 kvm_msr_entry_add(cpu, MSR_P6_PERFCTR0 + i, 4057 env->msr_gp_counters[i]); 4058 kvm_msr_entry_add(cpu, MSR_P6_EVNTSEL0 + i, 4059 env->msr_gp_evtsel[i]); 4060 } 4061 if (has_architectural_pmu_version > 1) { 4062 kvm_msr_entry_add(cpu, MSR_CORE_PERF_GLOBAL_STATUS, 4063 env->msr_global_status); 4064 kvm_msr_entry_add(cpu, MSR_CORE_PERF_GLOBAL_OVF_CTRL, 4065 env->msr_global_ovf_ctrl); 4066 4067 /* Now start the PMU. */ 4068 kvm_msr_entry_add(cpu, MSR_CORE_PERF_FIXED_CTR_CTRL, 4069 env->msr_fixed_ctr_ctrl); 4070 kvm_msr_entry_add(cpu, MSR_CORE_PERF_GLOBAL_CTRL, 4071 env->msr_global_ctrl); 4072 } 4073 } 4074 /* 4075 * Hyper-V partition-wide MSRs: to avoid clearing them on cpu hot-add, 4076 * only sync them to KVM on the first cpu 4077 */ 4078 if (current_cpu == first_cpu) { 4079 if (has_msr_hv_hypercall) { 4080 kvm_msr_entry_add(cpu, HV_X64_MSR_GUEST_OS_ID, 4081 env->msr_hv_guest_os_id); 4082 kvm_msr_entry_add(cpu, HV_X64_MSR_HYPERCALL, 4083 env->msr_hv_hypercall); 4084 } 4085 if (hyperv_feat_enabled(cpu, HYPERV_FEAT_TIME)) { 4086 kvm_msr_entry_add(cpu, HV_X64_MSR_REFERENCE_TSC, 4087 env->msr_hv_tsc); 4088 } 4089 if (hyperv_feat_enabled(cpu, HYPERV_FEAT_REENLIGHTENMENT)) { 4090 kvm_msr_entry_add(cpu, HV_X64_MSR_REENLIGHTENMENT_CONTROL, 4091 env->msr_hv_reenlightenment_control); 4092 kvm_msr_entry_add(cpu, HV_X64_MSR_TSC_EMULATION_CONTROL, 4093 env->msr_hv_tsc_emulation_control); 4094 kvm_msr_entry_add(cpu, HV_X64_MSR_TSC_EMULATION_STATUS, 4095 env->msr_hv_tsc_emulation_status); 4096 } 4097 if (hyperv_feat_enabled(cpu, HYPERV_FEAT_SYNDBG) && 4098 has_msr_hv_syndbg_options) { 4099 kvm_msr_entry_add(cpu, HV_X64_MSR_SYNDBG_OPTIONS, 4100 hyperv_syndbg_query_options()); 4101 } 4102 } 4103 if (hyperv_feat_enabled(cpu, HYPERV_FEAT_VAPIC)) { 4104 kvm_msr_entry_add(cpu, HV_X64_MSR_APIC_ASSIST_PAGE, 4105 env->msr_hv_vapic); 4106 } 4107 if (has_msr_hv_crash) { 4108 int j; 4109 4110 for (j = 0; j < HV_CRASH_PARAMS; j++) 4111 kvm_msr_entry_add(cpu, HV_X64_MSR_CRASH_P0 + j, 4112 env->msr_hv_crash_params[j]); 4113 4114 kvm_msr_entry_add(cpu, HV_X64_MSR_CRASH_CTL, HV_CRASH_CTL_NOTIFY); 4115 } 4116 if (has_msr_hv_runtime) { 4117 kvm_msr_entry_add(cpu, HV_X64_MSR_VP_RUNTIME, env->msr_hv_runtime); 4118 } 4119 if (hyperv_feat_enabled(cpu, HYPERV_FEAT_VPINDEX) 4120 && hv_vpindex_settable) { 4121 kvm_msr_entry_add(cpu, HV_X64_MSR_VP_INDEX, 4122 hyperv_vp_index(CPU(cpu))); 4123 } 4124 if (hyperv_feat_enabled(cpu, HYPERV_FEAT_SYNIC)) { 4125 int j; 4126 4127 kvm_msr_entry_add(cpu, HV_X64_MSR_SVERSION, HV_SYNIC_VERSION); 4128 4129 kvm_msr_entry_add(cpu, HV_X64_MSR_SCONTROL, 4130 env->msr_hv_synic_control); 4131 kvm_msr_entry_add(cpu, HV_X64_MSR_SIEFP, 4132 env->msr_hv_synic_evt_page); 4133 kvm_msr_entry_add(cpu, HV_X64_MSR_SIMP, 4134 env->msr_hv_synic_msg_page); 4135 4136 for (j = 0; j < ARRAY_SIZE(env->msr_hv_synic_sint); j++) { 4137 kvm_msr_entry_add(cpu, HV_X64_MSR_SINT0 + j, 4138 env->msr_hv_synic_sint[j]); 4139 } 4140 } 4141 if (has_msr_hv_stimer) { 4142 int j; 4143 4144 for (j = 0; j < ARRAY_SIZE(env->msr_hv_stimer_config); j++) { 4145 kvm_msr_entry_add(cpu, HV_X64_MSR_STIMER0_CONFIG + j * 2, 4146 env->msr_hv_stimer_config[j]); 4147 } 4148 4149 for (j = 0; j < ARRAY_SIZE(env->msr_hv_stimer_count); j++) { 4150 kvm_msr_entry_add(cpu, HV_X64_MSR_STIMER0_COUNT + j * 2, 4151 env->msr_hv_stimer_count[j]); 4152 } 4153 } 4154 if (env->features[FEAT_1_EDX] & CPUID_MTRR) { 4155 uint64_t phys_mask = MAKE_64BIT_MASK(0, cpu->phys_bits); 4156 4157 kvm_msr_entry_add(cpu, MSR_MTRRdefType, env->mtrr_deftype); 4158 kvm_msr_entry_add(cpu, MSR_MTRRfix64K_00000, env->mtrr_fixed[0]); 4159 kvm_msr_entry_add(cpu, MSR_MTRRfix16K_80000, env->mtrr_fixed[1]); 4160 kvm_msr_entry_add(cpu, MSR_MTRRfix16K_A0000, env->mtrr_fixed[2]); 4161 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_C0000, env->mtrr_fixed[3]); 4162 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_C8000, env->mtrr_fixed[4]); 4163 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_D0000, env->mtrr_fixed[5]); 4164 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_D8000, env->mtrr_fixed[6]); 4165 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_E0000, env->mtrr_fixed[7]); 4166 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_E8000, env->mtrr_fixed[8]); 4167 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_F0000, env->mtrr_fixed[9]); 4168 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_F8000, env->mtrr_fixed[10]); 4169 for (i = 0; i < MSR_MTRRcap_VCNT; i++) { 4170 /* The CPU GPs if we write to a bit above the physical limit of 4171 * the host CPU (and KVM emulates that) 4172 */ 4173 uint64_t mask = env->mtrr_var[i].mask; 4174 mask &= phys_mask; 4175 4176 kvm_msr_entry_add(cpu, MSR_MTRRphysBase(i), 4177 env->mtrr_var[i].base); 4178 kvm_msr_entry_add(cpu, MSR_MTRRphysMask(i), mask); 4179 } 4180 } 4181 if (env->features[FEAT_7_0_EBX] & CPUID_7_0_EBX_INTEL_PT) { 4182 int addr_num = kvm_arch_get_supported_cpuid(kvm_state, 4183 0x14, 1, R_EAX) & 0x7; 4184 4185 kvm_msr_entry_add(cpu, MSR_IA32_RTIT_CTL, 4186 env->msr_rtit_ctrl); 4187 kvm_msr_entry_add(cpu, MSR_IA32_RTIT_STATUS, 4188 env->msr_rtit_status); 4189 kvm_msr_entry_add(cpu, MSR_IA32_RTIT_OUTPUT_BASE, 4190 env->msr_rtit_output_base); 4191 kvm_msr_entry_add(cpu, MSR_IA32_RTIT_OUTPUT_MASK, 4192 env->msr_rtit_output_mask); 4193 kvm_msr_entry_add(cpu, MSR_IA32_RTIT_CR3_MATCH, 4194 env->msr_rtit_cr3_match); 4195 for (i = 0; i < addr_num; i++) { 4196 kvm_msr_entry_add(cpu, MSR_IA32_RTIT_ADDR0_A + i, 4197 env->msr_rtit_addrs[i]); 4198 } 4199 } 4200 4201 if (env->features[FEAT_7_0_ECX] & CPUID_7_0_ECX_SGX_LC) { 4202 kvm_msr_entry_add(cpu, MSR_IA32_SGXLEPUBKEYHASH0, 4203 env->msr_ia32_sgxlepubkeyhash[0]); 4204 kvm_msr_entry_add(cpu, MSR_IA32_SGXLEPUBKEYHASH1, 4205 env->msr_ia32_sgxlepubkeyhash[1]); 4206 kvm_msr_entry_add(cpu, MSR_IA32_SGXLEPUBKEYHASH2, 4207 env->msr_ia32_sgxlepubkeyhash[2]); 4208 kvm_msr_entry_add(cpu, MSR_IA32_SGXLEPUBKEYHASH3, 4209 env->msr_ia32_sgxlepubkeyhash[3]); 4210 } 4211 4212 if (env->features[FEAT_XSAVE] & CPUID_D_1_EAX_XFD) { 4213 kvm_msr_entry_add(cpu, MSR_IA32_XFD, 4214 env->msr_xfd); 4215 kvm_msr_entry_add(cpu, MSR_IA32_XFD_ERR, 4216 env->msr_xfd_err); 4217 } 4218 4219 if (kvm_enabled() && cpu->enable_pmu && 4220 (env->features[FEAT_7_0_EDX] & CPUID_7_0_EDX_ARCH_LBR)) { 4221 uint64_t depth; 4222 int ret; 4223 4224 /* 4225 * Only migrate Arch LBR states when the host Arch LBR depth 4226 * equals that of source guest's, this is to avoid mismatch 4227 * of guest/host config for the msr hence avoid unexpected 4228 * misbehavior. 4229 */ 4230 ret = kvm_get_one_msr(cpu, MSR_ARCH_LBR_DEPTH, &depth); 4231 4232 if (ret == 1 && !!depth && depth == env->msr_lbr_depth) { 4233 kvm_msr_entry_add(cpu, MSR_ARCH_LBR_CTL, env->msr_lbr_ctl); 4234 kvm_msr_entry_add(cpu, MSR_ARCH_LBR_DEPTH, env->msr_lbr_depth); 4235 4236 for (i = 0; i < ARCH_LBR_NR_ENTRIES; i++) { 4237 if (!env->lbr_records[i].from) { 4238 continue; 4239 } 4240 kvm_msr_entry_add(cpu, MSR_ARCH_LBR_FROM_0 + i, 4241 env->lbr_records[i].from); 4242 kvm_msr_entry_add(cpu, MSR_ARCH_LBR_TO_0 + i, 4243 env->lbr_records[i].to); 4244 kvm_msr_entry_add(cpu, MSR_ARCH_LBR_INFO_0 + i, 4245 env->lbr_records[i].info); 4246 } 4247 } 4248 } 4249 4250 /* Note: MSR_IA32_FEATURE_CONTROL is written separately, see 4251 * kvm_put_msr_feature_control. */ 4252 } 4253 4254 if (env->mcg_cap) { 4255 kvm_msr_entry_add(cpu, MSR_MCG_STATUS, env->mcg_status); 4256 kvm_msr_entry_add(cpu, MSR_MCG_CTL, env->mcg_ctl); 4257 if (has_msr_mcg_ext_ctl) { 4258 kvm_msr_entry_add(cpu, MSR_MCG_EXT_CTL, env->mcg_ext_ctl); 4259 } 4260 for (i = 0; i < (env->mcg_cap & 0xff) * 4; i++) { 4261 kvm_msr_entry_add(cpu, MSR_MC0_CTL + i, env->mce_banks[i]); 4262 } 4263 } 4264 4265 return kvm_buf_set_msrs(cpu); 4266 } 4267 4268 4269 static int kvm_get_xsave(X86CPU *cpu) 4270 { 4271 CPUX86State *env = &cpu->env; 4272 void *xsave = env->xsave_buf; 4273 unsigned long type; 4274 int ret; 4275 4276 type = has_xsave2 ? KVM_GET_XSAVE2 : KVM_GET_XSAVE; 4277 ret = kvm_vcpu_ioctl(CPU(cpu), type, xsave); 4278 if (ret < 0) { 4279 return ret; 4280 } 4281 x86_cpu_xrstor_all_areas(cpu, xsave, env->xsave_buf_len); 4282 4283 return 0; 4284 } 4285 4286 static int kvm_get_xcrs(X86CPU *cpu) 4287 { 4288 CPUX86State *env = &cpu->env; 4289 int i, ret; 4290 struct kvm_xcrs xcrs; 4291 4292 if (!has_xcrs) { 4293 return 0; 4294 } 4295 4296 ret = kvm_vcpu_ioctl(CPU(cpu), KVM_GET_XCRS, &xcrs); 4297 if (ret < 0) { 4298 return ret; 4299 } 4300 4301 for (i = 0; i < xcrs.nr_xcrs; i++) { 4302 /* Only support xcr0 now */ 4303 if (xcrs.xcrs[i].xcr == 0) { 4304 env->xcr0 = xcrs.xcrs[i].value; 4305 break; 4306 } 4307 } 4308 return 0; 4309 } 4310 4311 static int kvm_get_sregs(X86CPU *cpu) 4312 { 4313 CPUX86State *env = &cpu->env; 4314 struct kvm_sregs sregs; 4315 int ret; 4316 4317 ret = kvm_vcpu_ioctl(CPU(cpu), KVM_GET_SREGS, &sregs); 4318 if (ret < 0) { 4319 return ret; 4320 } 4321 4322 /* 4323 * The interrupt_bitmap is ignored because KVM_GET_SREGS is 4324 * always preceded by KVM_GET_VCPU_EVENTS. 4325 */ 4326 4327 get_seg(&env->segs[R_CS], &sregs.cs); 4328 get_seg(&env->segs[R_DS], &sregs.ds); 4329 get_seg(&env->segs[R_ES], &sregs.es); 4330 get_seg(&env->segs[R_FS], &sregs.fs); 4331 get_seg(&env->segs[R_GS], &sregs.gs); 4332 get_seg(&env->segs[R_SS], &sregs.ss); 4333 4334 get_seg(&env->tr, &sregs.tr); 4335 get_seg(&env->ldt, &sregs.ldt); 4336 4337 env->idt.limit = sregs.idt.limit; 4338 env->idt.base = sregs.idt.base; 4339 env->gdt.limit = sregs.gdt.limit; 4340 env->gdt.base = sregs.gdt.base; 4341 4342 env->cr[0] = sregs.cr0; 4343 env->cr[2] = sregs.cr2; 4344 env->cr[3] = sregs.cr3; 4345 env->cr[4] = sregs.cr4; 4346 4347 env->efer = sregs.efer; 4348 if (sev_es_enabled() && env->efer & MSR_EFER_LME && 4349 env->cr[0] & CR0_PG_MASK) { 4350 env->efer |= MSR_EFER_LMA; 4351 } 4352 4353 /* changes to apic base and cr8/tpr are read back via kvm_arch_post_run */ 4354 x86_update_hflags(env); 4355 4356 return 0; 4357 } 4358 4359 static int kvm_get_sregs2(X86CPU *cpu) 4360 { 4361 CPUX86State *env = &cpu->env; 4362 struct kvm_sregs2 sregs; 4363 int i, ret; 4364 4365 ret = kvm_vcpu_ioctl(CPU(cpu), KVM_GET_SREGS2, &sregs); 4366 if (ret < 0) { 4367 return ret; 4368 } 4369 4370 get_seg(&env->segs[R_CS], &sregs.cs); 4371 get_seg(&env->segs[R_DS], &sregs.ds); 4372 get_seg(&env->segs[R_ES], &sregs.es); 4373 get_seg(&env->segs[R_FS], &sregs.fs); 4374 get_seg(&env->segs[R_GS], &sregs.gs); 4375 get_seg(&env->segs[R_SS], &sregs.ss); 4376 4377 get_seg(&env->tr, &sregs.tr); 4378 get_seg(&env->ldt, &sregs.ldt); 4379 4380 env->idt.limit = sregs.idt.limit; 4381 env->idt.base = sregs.idt.base; 4382 env->gdt.limit = sregs.gdt.limit; 4383 env->gdt.base = sregs.gdt.base; 4384 4385 env->cr[0] = sregs.cr0; 4386 env->cr[2] = sregs.cr2; 4387 env->cr[3] = sregs.cr3; 4388 env->cr[4] = sregs.cr4; 4389 4390 env->efer = sregs.efer; 4391 if (sev_es_enabled() && env->efer & MSR_EFER_LME && 4392 env->cr[0] & CR0_PG_MASK) { 4393 env->efer |= MSR_EFER_LMA; 4394 } 4395 4396 env->pdptrs_valid = sregs.flags & KVM_SREGS2_FLAGS_PDPTRS_VALID; 4397 4398 if (env->pdptrs_valid) { 4399 for (i = 0; i < 4; i++) { 4400 env->pdptrs[i] = sregs.pdptrs[i]; 4401 } 4402 } 4403 4404 /* changes to apic base and cr8/tpr are read back via kvm_arch_post_run */ 4405 x86_update_hflags(env); 4406 4407 return 0; 4408 } 4409 4410 static int kvm_get_msrs(X86CPU *cpu) 4411 { 4412 CPUX86State *env = &cpu->env; 4413 struct kvm_msr_entry *msrs = cpu->kvm_msr_buf->entries; 4414 int ret, i; 4415 uint64_t mtrr_top_bits; 4416 4417 kvm_msr_buf_reset(cpu); 4418 4419 kvm_msr_entry_add(cpu, MSR_IA32_SYSENTER_CS, 0); 4420 kvm_msr_entry_add(cpu, MSR_IA32_SYSENTER_ESP, 0); 4421 kvm_msr_entry_add(cpu, MSR_IA32_SYSENTER_EIP, 0); 4422 kvm_msr_entry_add(cpu, MSR_PAT, 0); 4423 if (has_msr_star) { 4424 kvm_msr_entry_add(cpu, MSR_STAR, 0); 4425 } 4426 if (has_msr_hsave_pa) { 4427 kvm_msr_entry_add(cpu, MSR_VM_HSAVE_PA, 0); 4428 } 4429 if (has_msr_tsc_aux) { 4430 kvm_msr_entry_add(cpu, MSR_TSC_AUX, 0); 4431 } 4432 if (has_msr_tsc_adjust) { 4433 kvm_msr_entry_add(cpu, MSR_TSC_ADJUST, 0); 4434 } 4435 if (has_msr_tsc_deadline) { 4436 kvm_msr_entry_add(cpu, MSR_IA32_TSCDEADLINE, 0); 4437 } 4438 if (has_msr_misc_enable) { 4439 kvm_msr_entry_add(cpu, MSR_IA32_MISC_ENABLE, 0); 4440 } 4441 if (has_msr_smbase) { 4442 kvm_msr_entry_add(cpu, MSR_IA32_SMBASE, 0); 4443 } 4444 if (has_msr_smi_count) { 4445 kvm_msr_entry_add(cpu, MSR_SMI_COUNT, 0); 4446 } 4447 if (has_msr_feature_control) { 4448 kvm_msr_entry_add(cpu, MSR_IA32_FEATURE_CONTROL, 0); 4449 } 4450 if (has_msr_pkrs) { 4451 kvm_msr_entry_add(cpu, MSR_IA32_PKRS, 0); 4452 } 4453 if (has_msr_bndcfgs) { 4454 kvm_msr_entry_add(cpu, MSR_IA32_BNDCFGS, 0); 4455 } 4456 if (has_msr_xss) { 4457 kvm_msr_entry_add(cpu, MSR_IA32_XSS, 0); 4458 } 4459 if (has_msr_umwait) { 4460 kvm_msr_entry_add(cpu, MSR_IA32_UMWAIT_CONTROL, 0); 4461 } 4462 if (has_msr_spec_ctrl) { 4463 kvm_msr_entry_add(cpu, MSR_IA32_SPEC_CTRL, 0); 4464 } 4465 if (has_tsc_scale_msr) { 4466 kvm_msr_entry_add(cpu, MSR_AMD64_TSC_RATIO, 0); 4467 } 4468 4469 if (has_msr_tsx_ctrl) { 4470 kvm_msr_entry_add(cpu, MSR_IA32_TSX_CTRL, 0); 4471 } 4472 if (has_msr_virt_ssbd) { 4473 kvm_msr_entry_add(cpu, MSR_VIRT_SSBD, 0); 4474 } 4475 if (!env->tsc_valid) { 4476 kvm_msr_entry_add(cpu, MSR_IA32_TSC, 0); 4477 env->tsc_valid = !runstate_is_running(); 4478 } 4479 if (has_msr_hwcr) { 4480 kvm_msr_entry_add(cpu, MSR_K7_HWCR, 0); 4481 } 4482 4483 #ifdef TARGET_X86_64 4484 if (lm_capable_kernel) { 4485 kvm_msr_entry_add(cpu, MSR_CSTAR, 0); 4486 kvm_msr_entry_add(cpu, MSR_KERNELGSBASE, 0); 4487 kvm_msr_entry_add(cpu, MSR_FMASK, 0); 4488 kvm_msr_entry_add(cpu, MSR_LSTAR, 0); 4489 if (env->features[FEAT_7_1_EAX] & CPUID_7_1_EAX_FRED) { 4490 kvm_msr_entry_add(cpu, MSR_IA32_FRED_RSP0, 0); 4491 kvm_msr_entry_add(cpu, MSR_IA32_FRED_RSP1, 0); 4492 kvm_msr_entry_add(cpu, MSR_IA32_FRED_RSP2, 0); 4493 kvm_msr_entry_add(cpu, MSR_IA32_FRED_RSP3, 0); 4494 kvm_msr_entry_add(cpu, MSR_IA32_FRED_STKLVLS, 0); 4495 kvm_msr_entry_add(cpu, MSR_IA32_FRED_SSP1, 0); 4496 kvm_msr_entry_add(cpu, MSR_IA32_FRED_SSP2, 0); 4497 kvm_msr_entry_add(cpu, MSR_IA32_FRED_SSP3, 0); 4498 kvm_msr_entry_add(cpu, MSR_IA32_FRED_CONFIG, 0); 4499 } 4500 } 4501 #endif 4502 if (env->features[FEAT_KVM] & (CPUID_KVM_CLOCK | CPUID_KVM_CLOCK2)) { 4503 kvm_msr_entry_add(cpu, MSR_KVM_SYSTEM_TIME, 0); 4504 kvm_msr_entry_add(cpu, MSR_KVM_WALL_CLOCK, 0); 4505 } 4506 if (env->features[FEAT_KVM] & CPUID_KVM_ASYNCPF_INT) { 4507 kvm_msr_entry_add(cpu, MSR_KVM_ASYNC_PF_INT, 0); 4508 } 4509 if (env->features[FEAT_KVM] & CPUID_KVM_ASYNCPF) { 4510 kvm_msr_entry_add(cpu, MSR_KVM_ASYNC_PF_EN, 0); 4511 } 4512 if (env->features[FEAT_KVM] & CPUID_KVM_PV_EOI) { 4513 kvm_msr_entry_add(cpu, MSR_KVM_PV_EOI_EN, 0); 4514 } 4515 if (env->features[FEAT_KVM] & CPUID_KVM_STEAL_TIME) { 4516 kvm_msr_entry_add(cpu, MSR_KVM_STEAL_TIME, 0); 4517 } 4518 if (env->features[FEAT_KVM] & CPUID_KVM_POLL_CONTROL) { 4519 kvm_msr_entry_add(cpu, MSR_KVM_POLL_CONTROL, 1); 4520 } 4521 if (has_architectural_pmu_version > 0) { 4522 if (has_architectural_pmu_version > 1) { 4523 kvm_msr_entry_add(cpu, MSR_CORE_PERF_FIXED_CTR_CTRL, 0); 4524 kvm_msr_entry_add(cpu, MSR_CORE_PERF_GLOBAL_CTRL, 0); 4525 kvm_msr_entry_add(cpu, MSR_CORE_PERF_GLOBAL_STATUS, 0); 4526 kvm_msr_entry_add(cpu, MSR_CORE_PERF_GLOBAL_OVF_CTRL, 0); 4527 } 4528 for (i = 0; i < num_architectural_pmu_fixed_counters; i++) { 4529 kvm_msr_entry_add(cpu, MSR_CORE_PERF_FIXED_CTR0 + i, 0); 4530 } 4531 for (i = 0; i < num_architectural_pmu_gp_counters; i++) { 4532 kvm_msr_entry_add(cpu, MSR_P6_PERFCTR0 + i, 0); 4533 kvm_msr_entry_add(cpu, MSR_P6_EVNTSEL0 + i, 0); 4534 } 4535 } 4536 4537 if (env->mcg_cap) { 4538 kvm_msr_entry_add(cpu, MSR_MCG_STATUS, 0); 4539 kvm_msr_entry_add(cpu, MSR_MCG_CTL, 0); 4540 if (has_msr_mcg_ext_ctl) { 4541 kvm_msr_entry_add(cpu, MSR_MCG_EXT_CTL, 0); 4542 } 4543 for (i = 0; i < (env->mcg_cap & 0xff) * 4; i++) { 4544 kvm_msr_entry_add(cpu, MSR_MC0_CTL + i, 0); 4545 } 4546 } 4547 4548 if (has_msr_hv_hypercall) { 4549 kvm_msr_entry_add(cpu, HV_X64_MSR_HYPERCALL, 0); 4550 kvm_msr_entry_add(cpu, HV_X64_MSR_GUEST_OS_ID, 0); 4551 } 4552 if (hyperv_feat_enabled(cpu, HYPERV_FEAT_VAPIC)) { 4553 kvm_msr_entry_add(cpu, HV_X64_MSR_APIC_ASSIST_PAGE, 0); 4554 } 4555 if (hyperv_feat_enabled(cpu, HYPERV_FEAT_TIME)) { 4556 kvm_msr_entry_add(cpu, HV_X64_MSR_REFERENCE_TSC, 0); 4557 } 4558 if (hyperv_feat_enabled(cpu, HYPERV_FEAT_REENLIGHTENMENT)) { 4559 kvm_msr_entry_add(cpu, HV_X64_MSR_REENLIGHTENMENT_CONTROL, 0); 4560 kvm_msr_entry_add(cpu, HV_X64_MSR_TSC_EMULATION_CONTROL, 0); 4561 kvm_msr_entry_add(cpu, HV_X64_MSR_TSC_EMULATION_STATUS, 0); 4562 } 4563 if (has_msr_hv_syndbg_options) { 4564 kvm_msr_entry_add(cpu, HV_X64_MSR_SYNDBG_OPTIONS, 0); 4565 } 4566 if (has_msr_hv_crash) { 4567 int j; 4568 4569 for (j = 0; j < HV_CRASH_PARAMS; j++) { 4570 kvm_msr_entry_add(cpu, HV_X64_MSR_CRASH_P0 + j, 0); 4571 } 4572 } 4573 if (has_msr_hv_runtime) { 4574 kvm_msr_entry_add(cpu, HV_X64_MSR_VP_RUNTIME, 0); 4575 } 4576 if (hyperv_feat_enabled(cpu, HYPERV_FEAT_SYNIC)) { 4577 uint32_t msr; 4578 4579 kvm_msr_entry_add(cpu, HV_X64_MSR_SCONTROL, 0); 4580 kvm_msr_entry_add(cpu, HV_X64_MSR_SIEFP, 0); 4581 kvm_msr_entry_add(cpu, HV_X64_MSR_SIMP, 0); 4582 for (msr = HV_X64_MSR_SINT0; msr <= HV_X64_MSR_SINT15; msr++) { 4583 kvm_msr_entry_add(cpu, msr, 0); 4584 } 4585 } 4586 if (has_msr_hv_stimer) { 4587 uint32_t msr; 4588 4589 for (msr = HV_X64_MSR_STIMER0_CONFIG; msr <= HV_X64_MSR_STIMER3_COUNT; 4590 msr++) { 4591 kvm_msr_entry_add(cpu, msr, 0); 4592 } 4593 } 4594 if (env->features[FEAT_1_EDX] & CPUID_MTRR) { 4595 kvm_msr_entry_add(cpu, MSR_MTRRdefType, 0); 4596 kvm_msr_entry_add(cpu, MSR_MTRRfix64K_00000, 0); 4597 kvm_msr_entry_add(cpu, MSR_MTRRfix16K_80000, 0); 4598 kvm_msr_entry_add(cpu, MSR_MTRRfix16K_A0000, 0); 4599 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_C0000, 0); 4600 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_C8000, 0); 4601 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_D0000, 0); 4602 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_D8000, 0); 4603 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_E0000, 0); 4604 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_E8000, 0); 4605 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_F0000, 0); 4606 kvm_msr_entry_add(cpu, MSR_MTRRfix4K_F8000, 0); 4607 for (i = 0; i < MSR_MTRRcap_VCNT; i++) { 4608 kvm_msr_entry_add(cpu, MSR_MTRRphysBase(i), 0); 4609 kvm_msr_entry_add(cpu, MSR_MTRRphysMask(i), 0); 4610 } 4611 } 4612 4613 if (env->features[FEAT_7_0_EBX] & CPUID_7_0_EBX_INTEL_PT) { 4614 int addr_num = 4615 kvm_arch_get_supported_cpuid(kvm_state, 0x14, 1, R_EAX) & 0x7; 4616 4617 kvm_msr_entry_add(cpu, MSR_IA32_RTIT_CTL, 0); 4618 kvm_msr_entry_add(cpu, MSR_IA32_RTIT_STATUS, 0); 4619 kvm_msr_entry_add(cpu, MSR_IA32_RTIT_OUTPUT_BASE, 0); 4620 kvm_msr_entry_add(cpu, MSR_IA32_RTIT_OUTPUT_MASK, 0); 4621 kvm_msr_entry_add(cpu, MSR_IA32_RTIT_CR3_MATCH, 0); 4622 for (i = 0; i < addr_num; i++) { 4623 kvm_msr_entry_add(cpu, MSR_IA32_RTIT_ADDR0_A + i, 0); 4624 } 4625 } 4626 4627 if (env->features[FEAT_7_0_ECX] & CPUID_7_0_ECX_SGX_LC) { 4628 kvm_msr_entry_add(cpu, MSR_IA32_SGXLEPUBKEYHASH0, 0); 4629 kvm_msr_entry_add(cpu, MSR_IA32_SGXLEPUBKEYHASH1, 0); 4630 kvm_msr_entry_add(cpu, MSR_IA32_SGXLEPUBKEYHASH2, 0); 4631 kvm_msr_entry_add(cpu, MSR_IA32_SGXLEPUBKEYHASH3, 0); 4632 } 4633 4634 if (env->features[FEAT_XSAVE] & CPUID_D_1_EAX_XFD) { 4635 kvm_msr_entry_add(cpu, MSR_IA32_XFD, 0); 4636 kvm_msr_entry_add(cpu, MSR_IA32_XFD_ERR, 0); 4637 } 4638 4639 if (kvm_enabled() && cpu->enable_pmu && 4640 (env->features[FEAT_7_0_EDX] & CPUID_7_0_EDX_ARCH_LBR)) { 4641 uint64_t depth; 4642 4643 ret = kvm_get_one_msr(cpu, MSR_ARCH_LBR_DEPTH, &depth); 4644 if (ret == 1 && depth == ARCH_LBR_NR_ENTRIES) { 4645 kvm_msr_entry_add(cpu, MSR_ARCH_LBR_CTL, 0); 4646 kvm_msr_entry_add(cpu, MSR_ARCH_LBR_DEPTH, 0); 4647 4648 for (i = 0; i < ARCH_LBR_NR_ENTRIES; i++) { 4649 kvm_msr_entry_add(cpu, MSR_ARCH_LBR_FROM_0 + i, 0); 4650 kvm_msr_entry_add(cpu, MSR_ARCH_LBR_TO_0 + i, 0); 4651 kvm_msr_entry_add(cpu, MSR_ARCH_LBR_INFO_0 + i, 0); 4652 } 4653 } 4654 } 4655 4656 ret = kvm_vcpu_ioctl(CPU(cpu), KVM_GET_MSRS, cpu->kvm_msr_buf); 4657 if (ret < 0) { 4658 return ret; 4659 } 4660 4661 if (ret < cpu->kvm_msr_buf->nmsrs) { 4662 struct kvm_msr_entry *e = &cpu->kvm_msr_buf->entries[ret]; 4663 error_report("error: failed to get MSR 0x%" PRIx32, 4664 (uint32_t)e->index); 4665 } 4666 4667 assert(ret == cpu->kvm_msr_buf->nmsrs); 4668 /* 4669 * MTRR masks: Each mask consists of 5 parts 4670 * a 10..0: must be zero 4671 * b 11 : valid bit 4672 * c n-1.12: actual mask bits 4673 * d 51..n: reserved must be zero 4674 * e 63.52: reserved must be zero 4675 * 4676 * 'n' is the number of physical bits supported by the CPU and is 4677 * apparently always <= 52. We know our 'n' but don't know what 4678 * the destinations 'n' is; it might be smaller, in which case 4679 * it masks (c) on loading. It might be larger, in which case 4680 * we fill 'd' so that d..c is consistent irrespetive of the 'n' 4681 * we're migrating to. 4682 */ 4683 4684 if (cpu->fill_mtrr_mask) { 4685 QEMU_BUILD_BUG_ON(TARGET_PHYS_ADDR_SPACE_BITS > 52); 4686 assert(cpu->phys_bits <= TARGET_PHYS_ADDR_SPACE_BITS); 4687 mtrr_top_bits = MAKE_64BIT_MASK(cpu->phys_bits, 52 - cpu->phys_bits); 4688 } else { 4689 mtrr_top_bits = 0; 4690 } 4691 4692 for (i = 0; i < ret; i++) { 4693 uint32_t index = msrs[i].index; 4694 switch (index) { 4695 case MSR_IA32_SYSENTER_CS: 4696 env->sysenter_cs = msrs[i].data; 4697 break; 4698 case MSR_IA32_SYSENTER_ESP: 4699 env->sysenter_esp = msrs[i].data; 4700 break; 4701 case MSR_IA32_SYSENTER_EIP: 4702 env->sysenter_eip = msrs[i].data; 4703 break; 4704 case MSR_PAT: 4705 env->pat = msrs[i].data; 4706 break; 4707 case MSR_STAR: 4708 env->star = msrs[i].data; 4709 break; 4710 #ifdef TARGET_X86_64 4711 case MSR_CSTAR: 4712 env->cstar = msrs[i].data; 4713 break; 4714 case MSR_KERNELGSBASE: 4715 env->kernelgsbase = msrs[i].data; 4716 break; 4717 case MSR_FMASK: 4718 env->fmask = msrs[i].data; 4719 break; 4720 case MSR_LSTAR: 4721 env->lstar = msrs[i].data; 4722 break; 4723 case MSR_IA32_FRED_RSP0: 4724 env->fred_rsp0 = msrs[i].data; 4725 break; 4726 case MSR_IA32_FRED_RSP1: 4727 env->fred_rsp1 = msrs[i].data; 4728 break; 4729 case MSR_IA32_FRED_RSP2: 4730 env->fred_rsp2 = msrs[i].data; 4731 break; 4732 case MSR_IA32_FRED_RSP3: 4733 env->fred_rsp3 = msrs[i].data; 4734 break; 4735 case MSR_IA32_FRED_STKLVLS: 4736 env->fred_stklvls = msrs[i].data; 4737 break; 4738 case MSR_IA32_FRED_SSP1: 4739 env->fred_ssp1 = msrs[i].data; 4740 break; 4741 case MSR_IA32_FRED_SSP2: 4742 env->fred_ssp2 = msrs[i].data; 4743 break; 4744 case MSR_IA32_FRED_SSP3: 4745 env->fred_ssp3 = msrs[i].data; 4746 break; 4747 case MSR_IA32_FRED_CONFIG: 4748 env->fred_config = msrs[i].data; 4749 break; 4750 #endif 4751 case MSR_IA32_TSC: 4752 env->tsc = msrs[i].data; 4753 break; 4754 case MSR_TSC_AUX: 4755 env->tsc_aux = msrs[i].data; 4756 break; 4757 case MSR_TSC_ADJUST: 4758 env->tsc_adjust = msrs[i].data; 4759 break; 4760 case MSR_IA32_TSCDEADLINE: 4761 env->tsc_deadline = msrs[i].data; 4762 break; 4763 case MSR_VM_HSAVE_PA: 4764 env->vm_hsave = msrs[i].data; 4765 break; 4766 case MSR_KVM_SYSTEM_TIME: 4767 env->system_time_msr = msrs[i].data; 4768 break; 4769 case MSR_KVM_WALL_CLOCK: 4770 env->wall_clock_msr = msrs[i].data; 4771 break; 4772 case MSR_MCG_STATUS: 4773 env->mcg_status = msrs[i].data; 4774 break; 4775 case MSR_MCG_CTL: 4776 env->mcg_ctl = msrs[i].data; 4777 break; 4778 case MSR_MCG_EXT_CTL: 4779 env->mcg_ext_ctl = msrs[i].data; 4780 break; 4781 case MSR_IA32_MISC_ENABLE: 4782 env->msr_ia32_misc_enable = msrs[i].data; 4783 break; 4784 case MSR_IA32_SMBASE: 4785 env->smbase = msrs[i].data; 4786 break; 4787 case MSR_SMI_COUNT: 4788 env->msr_smi_count = msrs[i].data; 4789 break; 4790 case MSR_IA32_FEATURE_CONTROL: 4791 env->msr_ia32_feature_control = msrs[i].data; 4792 break; 4793 case MSR_IA32_BNDCFGS: 4794 env->msr_bndcfgs = msrs[i].data; 4795 break; 4796 case MSR_IA32_XSS: 4797 env->xss = msrs[i].data; 4798 break; 4799 case MSR_IA32_UMWAIT_CONTROL: 4800 env->umwait = msrs[i].data; 4801 break; 4802 case MSR_IA32_PKRS: 4803 env->pkrs = msrs[i].data; 4804 break; 4805 default: 4806 if (msrs[i].index >= MSR_MC0_CTL && 4807 msrs[i].index < MSR_MC0_CTL + (env->mcg_cap & 0xff) * 4) { 4808 env->mce_banks[msrs[i].index - MSR_MC0_CTL] = msrs[i].data; 4809 } 4810 break; 4811 case MSR_KVM_ASYNC_PF_EN: 4812 env->async_pf_en_msr = msrs[i].data; 4813 break; 4814 case MSR_KVM_ASYNC_PF_INT: 4815 env->async_pf_int_msr = msrs[i].data; 4816 break; 4817 case MSR_KVM_PV_EOI_EN: 4818 env->pv_eoi_en_msr = msrs[i].data; 4819 break; 4820 case MSR_KVM_STEAL_TIME: 4821 env->steal_time_msr = msrs[i].data; 4822 break; 4823 case MSR_KVM_POLL_CONTROL: { 4824 env->poll_control_msr = msrs[i].data; 4825 break; 4826 } 4827 case MSR_CORE_PERF_FIXED_CTR_CTRL: 4828 env->msr_fixed_ctr_ctrl = msrs[i].data; 4829 break; 4830 case MSR_CORE_PERF_GLOBAL_CTRL: 4831 env->msr_global_ctrl = msrs[i].data; 4832 break; 4833 case MSR_CORE_PERF_GLOBAL_STATUS: 4834 env->msr_global_status = msrs[i].data; 4835 break; 4836 case MSR_CORE_PERF_GLOBAL_OVF_CTRL: 4837 env->msr_global_ovf_ctrl = msrs[i].data; 4838 break; 4839 case MSR_CORE_PERF_FIXED_CTR0 ... MSR_CORE_PERF_FIXED_CTR0 + MAX_FIXED_COUNTERS - 1: 4840 env->msr_fixed_counters[index - MSR_CORE_PERF_FIXED_CTR0] = msrs[i].data; 4841 break; 4842 case MSR_P6_PERFCTR0 ... MSR_P6_PERFCTR0 + MAX_GP_COUNTERS - 1: 4843 env->msr_gp_counters[index - MSR_P6_PERFCTR0] = msrs[i].data; 4844 break; 4845 case MSR_P6_EVNTSEL0 ... MSR_P6_EVNTSEL0 + MAX_GP_COUNTERS - 1: 4846 env->msr_gp_evtsel[index - MSR_P6_EVNTSEL0] = msrs[i].data; 4847 break; 4848 case HV_X64_MSR_HYPERCALL: 4849 env->msr_hv_hypercall = msrs[i].data; 4850 break; 4851 case HV_X64_MSR_GUEST_OS_ID: 4852 env->msr_hv_guest_os_id = msrs[i].data; 4853 break; 4854 case HV_X64_MSR_APIC_ASSIST_PAGE: 4855 env->msr_hv_vapic = msrs[i].data; 4856 break; 4857 case HV_X64_MSR_REFERENCE_TSC: 4858 env->msr_hv_tsc = msrs[i].data; 4859 break; 4860 case HV_X64_MSR_CRASH_P0 ... HV_X64_MSR_CRASH_P4: 4861 env->msr_hv_crash_params[index - HV_X64_MSR_CRASH_P0] = msrs[i].data; 4862 break; 4863 case HV_X64_MSR_VP_RUNTIME: 4864 env->msr_hv_runtime = msrs[i].data; 4865 break; 4866 case HV_X64_MSR_SCONTROL: 4867 env->msr_hv_synic_control = msrs[i].data; 4868 break; 4869 case HV_X64_MSR_SIEFP: 4870 env->msr_hv_synic_evt_page = msrs[i].data; 4871 break; 4872 case HV_X64_MSR_SIMP: 4873 env->msr_hv_synic_msg_page = msrs[i].data; 4874 break; 4875 case HV_X64_MSR_SINT0 ... HV_X64_MSR_SINT15: 4876 env->msr_hv_synic_sint[index - HV_X64_MSR_SINT0] = msrs[i].data; 4877 break; 4878 case HV_X64_MSR_STIMER0_CONFIG: 4879 case HV_X64_MSR_STIMER1_CONFIG: 4880 case HV_X64_MSR_STIMER2_CONFIG: 4881 case HV_X64_MSR_STIMER3_CONFIG: 4882 env->msr_hv_stimer_config[(index - HV_X64_MSR_STIMER0_CONFIG)/2] = 4883 msrs[i].data; 4884 break; 4885 case HV_X64_MSR_STIMER0_COUNT: 4886 case HV_X64_MSR_STIMER1_COUNT: 4887 case HV_X64_MSR_STIMER2_COUNT: 4888 case HV_X64_MSR_STIMER3_COUNT: 4889 env->msr_hv_stimer_count[(index - HV_X64_MSR_STIMER0_COUNT)/2] = 4890 msrs[i].data; 4891 break; 4892 case HV_X64_MSR_REENLIGHTENMENT_CONTROL: 4893 env->msr_hv_reenlightenment_control = msrs[i].data; 4894 break; 4895 case HV_X64_MSR_TSC_EMULATION_CONTROL: 4896 env->msr_hv_tsc_emulation_control = msrs[i].data; 4897 break; 4898 case HV_X64_MSR_TSC_EMULATION_STATUS: 4899 env->msr_hv_tsc_emulation_status = msrs[i].data; 4900 break; 4901 case HV_X64_MSR_SYNDBG_OPTIONS: 4902 env->msr_hv_syndbg_options = msrs[i].data; 4903 break; 4904 case MSR_MTRRdefType: 4905 env->mtrr_deftype = msrs[i].data; 4906 break; 4907 case MSR_MTRRfix64K_00000: 4908 env->mtrr_fixed[0] = msrs[i].data; 4909 break; 4910 case MSR_MTRRfix16K_80000: 4911 env->mtrr_fixed[1] = msrs[i].data; 4912 break; 4913 case MSR_MTRRfix16K_A0000: 4914 env->mtrr_fixed[2] = msrs[i].data; 4915 break; 4916 case MSR_MTRRfix4K_C0000: 4917 env->mtrr_fixed[3] = msrs[i].data; 4918 break; 4919 case MSR_MTRRfix4K_C8000: 4920 env->mtrr_fixed[4] = msrs[i].data; 4921 break; 4922 case MSR_MTRRfix4K_D0000: 4923 env->mtrr_fixed[5] = msrs[i].data; 4924 break; 4925 case MSR_MTRRfix4K_D8000: 4926 env->mtrr_fixed[6] = msrs[i].data; 4927 break; 4928 case MSR_MTRRfix4K_E0000: 4929 env->mtrr_fixed[7] = msrs[i].data; 4930 break; 4931 case MSR_MTRRfix4K_E8000: 4932 env->mtrr_fixed[8] = msrs[i].data; 4933 break; 4934 case MSR_MTRRfix4K_F0000: 4935 env->mtrr_fixed[9] = msrs[i].data; 4936 break; 4937 case MSR_MTRRfix4K_F8000: 4938 env->mtrr_fixed[10] = msrs[i].data; 4939 break; 4940 case MSR_MTRRphysBase(0) ... MSR_MTRRphysMask(MSR_MTRRcap_VCNT - 1): 4941 if (index & 1) { 4942 env->mtrr_var[MSR_MTRRphysIndex(index)].mask = msrs[i].data | 4943 mtrr_top_bits; 4944 } else { 4945 env->mtrr_var[MSR_MTRRphysIndex(index)].base = msrs[i].data; 4946 } 4947 break; 4948 case MSR_IA32_SPEC_CTRL: 4949 env->spec_ctrl = msrs[i].data; 4950 break; 4951 case MSR_AMD64_TSC_RATIO: 4952 env->amd_tsc_scale_msr = msrs[i].data; 4953 break; 4954 case MSR_IA32_TSX_CTRL: 4955 env->tsx_ctrl = msrs[i].data; 4956 break; 4957 case MSR_VIRT_SSBD: 4958 env->virt_ssbd = msrs[i].data; 4959 break; 4960 case MSR_IA32_RTIT_CTL: 4961 env->msr_rtit_ctrl = msrs[i].data; 4962 break; 4963 case MSR_IA32_RTIT_STATUS: 4964 env->msr_rtit_status = msrs[i].data; 4965 break; 4966 case MSR_IA32_RTIT_OUTPUT_BASE: 4967 env->msr_rtit_output_base = msrs[i].data; 4968 break; 4969 case MSR_IA32_RTIT_OUTPUT_MASK: 4970 env->msr_rtit_output_mask = msrs[i].data; 4971 break; 4972 case MSR_IA32_RTIT_CR3_MATCH: 4973 env->msr_rtit_cr3_match = msrs[i].data; 4974 break; 4975 case MSR_IA32_RTIT_ADDR0_A ... MSR_IA32_RTIT_ADDR3_B: 4976 env->msr_rtit_addrs[index - MSR_IA32_RTIT_ADDR0_A] = msrs[i].data; 4977 break; 4978 case MSR_IA32_SGXLEPUBKEYHASH0 ... MSR_IA32_SGXLEPUBKEYHASH3: 4979 env->msr_ia32_sgxlepubkeyhash[index - MSR_IA32_SGXLEPUBKEYHASH0] = 4980 msrs[i].data; 4981 break; 4982 case MSR_IA32_XFD: 4983 env->msr_xfd = msrs[i].data; 4984 break; 4985 case MSR_IA32_XFD_ERR: 4986 env->msr_xfd_err = msrs[i].data; 4987 break; 4988 case MSR_ARCH_LBR_CTL: 4989 env->msr_lbr_ctl = msrs[i].data; 4990 break; 4991 case MSR_ARCH_LBR_DEPTH: 4992 env->msr_lbr_depth = msrs[i].data; 4993 break; 4994 case MSR_ARCH_LBR_FROM_0 ... MSR_ARCH_LBR_FROM_0 + 31: 4995 env->lbr_records[index - MSR_ARCH_LBR_FROM_0].from = msrs[i].data; 4996 break; 4997 case MSR_ARCH_LBR_TO_0 ... MSR_ARCH_LBR_TO_0 + 31: 4998 env->lbr_records[index - MSR_ARCH_LBR_TO_0].to = msrs[i].data; 4999 break; 5000 case MSR_ARCH_LBR_INFO_0 ... MSR_ARCH_LBR_INFO_0 + 31: 5001 env->lbr_records[index - MSR_ARCH_LBR_INFO_0].info = msrs[i].data; 5002 break; 5003 case MSR_K7_HWCR: 5004 env->msr_hwcr = msrs[i].data; 5005 break; 5006 } 5007 } 5008 5009 return 0; 5010 } 5011 5012 static int kvm_put_mp_state(X86CPU *cpu) 5013 { 5014 struct kvm_mp_state mp_state = { .mp_state = cpu->env.mp_state }; 5015 5016 return kvm_vcpu_ioctl(CPU(cpu), KVM_SET_MP_STATE, &mp_state); 5017 } 5018 5019 static int kvm_get_mp_state(X86CPU *cpu) 5020 { 5021 CPUState *cs = CPU(cpu); 5022 CPUX86State *env = &cpu->env; 5023 struct kvm_mp_state mp_state; 5024 int ret; 5025 5026 ret = kvm_vcpu_ioctl(cs, KVM_GET_MP_STATE, &mp_state); 5027 if (ret < 0) { 5028 return ret; 5029 } 5030 env->mp_state = mp_state.mp_state; 5031 if (kvm_irqchip_in_kernel()) { 5032 cs->halted = (mp_state.mp_state == KVM_MP_STATE_HALTED); 5033 } 5034 return 0; 5035 } 5036 5037 static int kvm_get_apic(X86CPU *cpu) 5038 { 5039 DeviceState *apic = cpu->apic_state; 5040 struct kvm_lapic_state kapic; 5041 int ret; 5042 5043 if (apic && kvm_irqchip_in_kernel()) { 5044 ret = kvm_vcpu_ioctl(CPU(cpu), KVM_GET_LAPIC, &kapic); 5045 if (ret < 0) { 5046 return ret; 5047 } 5048 5049 kvm_get_apic_state(apic, &kapic); 5050 } 5051 return 0; 5052 } 5053 5054 static int kvm_put_vcpu_events(X86CPU *cpu, int level) 5055 { 5056 CPUState *cs = CPU(cpu); 5057 CPUX86State *env = &cpu->env; 5058 struct kvm_vcpu_events events = {}; 5059 5060 events.flags = 0; 5061 5062 if (has_exception_payload) { 5063 events.flags |= KVM_VCPUEVENT_VALID_PAYLOAD; 5064 events.exception.pending = env->exception_pending; 5065 events.exception_has_payload = env->exception_has_payload; 5066 events.exception_payload = env->exception_payload; 5067 } 5068 events.exception.nr = env->exception_nr; 5069 events.exception.injected = env->exception_injected; 5070 events.exception.has_error_code = env->has_error_code; 5071 events.exception.error_code = env->error_code; 5072 5073 events.interrupt.injected = (env->interrupt_injected >= 0); 5074 events.interrupt.nr = env->interrupt_injected; 5075 events.interrupt.soft = env->soft_interrupt; 5076 5077 events.nmi.injected = env->nmi_injected; 5078 events.nmi.pending = env->nmi_pending; 5079 events.nmi.masked = !!(env->hflags2 & HF2_NMI_MASK); 5080 5081 events.sipi_vector = env->sipi_vector; 5082 5083 if (has_msr_smbase) { 5084 events.flags |= KVM_VCPUEVENT_VALID_SMM; 5085 events.smi.smm = !!(env->hflags & HF_SMM_MASK); 5086 events.smi.smm_inside_nmi = !!(env->hflags2 & HF2_SMM_INSIDE_NMI_MASK); 5087 if (kvm_irqchip_in_kernel()) { 5088 /* As soon as these are moved to the kernel, remove them 5089 * from cs->interrupt_request. 5090 */ 5091 events.smi.pending = cs->interrupt_request & CPU_INTERRUPT_SMI; 5092 events.smi.latched_init = cs->interrupt_request & CPU_INTERRUPT_INIT; 5093 cs->interrupt_request &= ~(CPU_INTERRUPT_INIT | CPU_INTERRUPT_SMI); 5094 } else { 5095 /* Keep these in cs->interrupt_request. */ 5096 events.smi.pending = 0; 5097 events.smi.latched_init = 0; 5098 } 5099 } 5100 5101 if (level >= KVM_PUT_RESET_STATE) { 5102 events.flags |= KVM_VCPUEVENT_VALID_NMI_PENDING; 5103 if (env->mp_state == KVM_MP_STATE_SIPI_RECEIVED) { 5104 events.flags |= KVM_VCPUEVENT_VALID_SIPI_VECTOR; 5105 } 5106 } 5107 5108 if (has_triple_fault_event) { 5109 events.flags |= KVM_VCPUEVENT_VALID_TRIPLE_FAULT; 5110 events.triple_fault.pending = env->triple_fault_pending; 5111 } 5112 5113 return kvm_vcpu_ioctl(CPU(cpu), KVM_SET_VCPU_EVENTS, &events); 5114 } 5115 5116 static int kvm_get_vcpu_events(X86CPU *cpu) 5117 { 5118 CPUX86State *env = &cpu->env; 5119 struct kvm_vcpu_events events; 5120 int ret; 5121 5122 memset(&events, 0, sizeof(events)); 5123 ret = kvm_vcpu_ioctl(CPU(cpu), KVM_GET_VCPU_EVENTS, &events); 5124 if (ret < 0) { 5125 return ret; 5126 } 5127 5128 if (events.flags & KVM_VCPUEVENT_VALID_PAYLOAD) { 5129 env->exception_pending = events.exception.pending; 5130 env->exception_has_payload = events.exception_has_payload; 5131 env->exception_payload = events.exception_payload; 5132 } else { 5133 env->exception_pending = 0; 5134 env->exception_has_payload = false; 5135 } 5136 env->exception_injected = events.exception.injected; 5137 env->exception_nr = 5138 (env->exception_pending || env->exception_injected) ? 5139 events.exception.nr : -1; 5140 env->has_error_code = events.exception.has_error_code; 5141 env->error_code = events.exception.error_code; 5142 5143 env->interrupt_injected = 5144 events.interrupt.injected ? events.interrupt.nr : -1; 5145 env->soft_interrupt = events.interrupt.soft; 5146 5147 env->nmi_injected = events.nmi.injected; 5148 env->nmi_pending = events.nmi.pending; 5149 if (events.nmi.masked) { 5150 env->hflags2 |= HF2_NMI_MASK; 5151 } else { 5152 env->hflags2 &= ~HF2_NMI_MASK; 5153 } 5154 5155 if (events.flags & KVM_VCPUEVENT_VALID_SMM) { 5156 if (events.smi.smm) { 5157 env->hflags |= HF_SMM_MASK; 5158 } else { 5159 env->hflags &= ~HF_SMM_MASK; 5160 } 5161 if (events.smi.pending) { 5162 cpu_interrupt(CPU(cpu), CPU_INTERRUPT_SMI); 5163 } else { 5164 cpu_reset_interrupt(CPU(cpu), CPU_INTERRUPT_SMI); 5165 } 5166 if (events.smi.smm_inside_nmi) { 5167 env->hflags2 |= HF2_SMM_INSIDE_NMI_MASK; 5168 } else { 5169 env->hflags2 &= ~HF2_SMM_INSIDE_NMI_MASK; 5170 } 5171 if (events.smi.latched_init) { 5172 cpu_interrupt(CPU(cpu), CPU_INTERRUPT_INIT); 5173 } else { 5174 cpu_reset_interrupt(CPU(cpu), CPU_INTERRUPT_INIT); 5175 } 5176 } 5177 5178 if (events.flags & KVM_VCPUEVENT_VALID_TRIPLE_FAULT) { 5179 env->triple_fault_pending = events.triple_fault.pending; 5180 } 5181 5182 env->sipi_vector = events.sipi_vector; 5183 5184 return 0; 5185 } 5186 5187 static int kvm_put_debugregs(X86CPU *cpu) 5188 { 5189 CPUX86State *env = &cpu->env; 5190 struct kvm_debugregs dbgregs; 5191 int i; 5192 5193 memset(&dbgregs, 0, sizeof(dbgregs)); 5194 for (i = 0; i < 4; i++) { 5195 dbgregs.db[i] = env->dr[i]; 5196 } 5197 dbgregs.dr6 = env->dr[6]; 5198 dbgregs.dr7 = env->dr[7]; 5199 dbgregs.flags = 0; 5200 5201 return kvm_vcpu_ioctl(CPU(cpu), KVM_SET_DEBUGREGS, &dbgregs); 5202 } 5203 5204 static int kvm_get_debugregs(X86CPU *cpu) 5205 { 5206 CPUX86State *env = &cpu->env; 5207 struct kvm_debugregs dbgregs; 5208 int i, ret; 5209 5210 ret = kvm_vcpu_ioctl(CPU(cpu), KVM_GET_DEBUGREGS, &dbgregs); 5211 if (ret < 0) { 5212 return ret; 5213 } 5214 for (i = 0; i < 4; i++) { 5215 env->dr[i] = dbgregs.db[i]; 5216 } 5217 env->dr[4] = env->dr[6] = dbgregs.dr6; 5218 env->dr[5] = env->dr[7] = dbgregs.dr7; 5219 5220 return 0; 5221 } 5222 5223 static int kvm_put_nested_state(X86CPU *cpu) 5224 { 5225 CPUX86State *env = &cpu->env; 5226 int max_nested_state_len = kvm_max_nested_state_length(); 5227 5228 if (!env->nested_state) { 5229 return 0; 5230 } 5231 5232 /* 5233 * Copy flags that are affected by reset from env->hflags and env->hflags2. 5234 */ 5235 if (env->hflags & HF_GUEST_MASK) { 5236 env->nested_state->flags |= KVM_STATE_NESTED_GUEST_MODE; 5237 } else { 5238 env->nested_state->flags &= ~KVM_STATE_NESTED_GUEST_MODE; 5239 } 5240 5241 /* Don't set KVM_STATE_NESTED_GIF_SET on VMX as it is illegal */ 5242 if (cpu_has_svm(env) && (env->hflags2 & HF2_GIF_MASK)) { 5243 env->nested_state->flags |= KVM_STATE_NESTED_GIF_SET; 5244 } else { 5245 env->nested_state->flags &= ~KVM_STATE_NESTED_GIF_SET; 5246 } 5247 5248 assert(env->nested_state->size <= max_nested_state_len); 5249 return kvm_vcpu_ioctl(CPU(cpu), KVM_SET_NESTED_STATE, env->nested_state); 5250 } 5251 5252 static int kvm_get_nested_state(X86CPU *cpu) 5253 { 5254 CPUX86State *env = &cpu->env; 5255 int max_nested_state_len = kvm_max_nested_state_length(); 5256 int ret; 5257 5258 if (!env->nested_state) { 5259 return 0; 5260 } 5261 5262 /* 5263 * It is possible that migration restored a smaller size into 5264 * nested_state->hdr.size than what our kernel support. 5265 * We preserve migration origin nested_state->hdr.size for 5266 * call to KVM_SET_NESTED_STATE but wish that our next call 5267 * to KVM_GET_NESTED_STATE will use max size our kernel support. 5268 */ 5269 env->nested_state->size = max_nested_state_len; 5270 5271 ret = kvm_vcpu_ioctl(CPU(cpu), KVM_GET_NESTED_STATE, env->nested_state); 5272 if (ret < 0) { 5273 return ret; 5274 } 5275 5276 /* 5277 * Copy flags that are affected by reset to env->hflags and env->hflags2. 5278 */ 5279 if (env->nested_state->flags & KVM_STATE_NESTED_GUEST_MODE) { 5280 env->hflags |= HF_GUEST_MASK; 5281 } else { 5282 env->hflags &= ~HF_GUEST_MASK; 5283 } 5284 5285 /* Keep HF2_GIF_MASK set on !SVM as x86_cpu_pending_interrupt() needs it */ 5286 if (cpu_has_svm(env)) { 5287 if (env->nested_state->flags & KVM_STATE_NESTED_GIF_SET) { 5288 env->hflags2 |= HF2_GIF_MASK; 5289 } else { 5290 env->hflags2 &= ~HF2_GIF_MASK; 5291 } 5292 } 5293 5294 return ret; 5295 } 5296 5297 int kvm_arch_put_registers(CPUState *cpu, int level, Error **errp) 5298 { 5299 X86CPU *x86_cpu = X86_CPU(cpu); 5300 int ret; 5301 5302 assert(cpu_is_stopped(cpu) || qemu_cpu_is_self(cpu)); 5303 5304 /* 5305 * Put MSR_IA32_FEATURE_CONTROL first, this ensures the VM gets out of VMX 5306 * root operation upon vCPU reset. kvm_put_msr_feature_control() should also 5307 * precede kvm_put_nested_state() when 'real' nested state is set. 5308 */ 5309 if (level >= KVM_PUT_RESET_STATE) { 5310 ret = kvm_put_msr_feature_control(x86_cpu); 5311 if (ret < 0) { 5312 error_setg_errno(errp, -ret, "Failed to set feature control MSR"); 5313 return ret; 5314 } 5315 } 5316 5317 /* must be before kvm_put_nested_state so that EFER.SVME is set */ 5318 ret = has_sregs2 ? kvm_put_sregs2(x86_cpu) : kvm_put_sregs(x86_cpu); 5319 if (ret < 0) { 5320 error_setg_errno(errp, -ret, "Failed to set special registers"); 5321 return ret; 5322 } 5323 5324 if (level >= KVM_PUT_RESET_STATE) { 5325 ret = kvm_put_nested_state(x86_cpu); 5326 if (ret < 0) { 5327 error_setg_errno(errp, -ret, "Failed to set nested state"); 5328 return ret; 5329 } 5330 } 5331 5332 if (level == KVM_PUT_FULL_STATE) { 5333 /* We don't check for kvm_arch_set_tsc_khz() errors here, 5334 * because TSC frequency mismatch shouldn't abort migration, 5335 * unless the user explicitly asked for a more strict TSC 5336 * setting (e.g. using an explicit "tsc-freq" option). 5337 */ 5338 kvm_arch_set_tsc_khz(cpu); 5339 } 5340 5341 #ifdef CONFIG_XEN_EMU 5342 if (xen_mode == XEN_EMULATE && level == KVM_PUT_FULL_STATE) { 5343 ret = kvm_put_xen_state(cpu); 5344 if (ret < 0) { 5345 error_setg_errno(errp, -ret, "Failed to set Xen state"); 5346 return ret; 5347 } 5348 } 5349 #endif 5350 5351 ret = kvm_getput_regs(x86_cpu, 1); 5352 if (ret < 0) { 5353 error_setg_errno(errp, -ret, "Failed to set general purpose registers"); 5354 return ret; 5355 } 5356 ret = kvm_put_xsave(x86_cpu); 5357 if (ret < 0) { 5358 error_setg_errno(errp, -ret, "Failed to set XSAVE"); 5359 return ret; 5360 } 5361 ret = kvm_put_xcrs(x86_cpu); 5362 if (ret < 0) { 5363 error_setg_errno(errp, -ret, "Failed to set XCRs"); 5364 return ret; 5365 } 5366 ret = kvm_put_msrs(x86_cpu, level); 5367 if (ret < 0) { 5368 error_setg_errno(errp, -ret, "Failed to set MSRs"); 5369 return ret; 5370 } 5371 ret = kvm_put_vcpu_events(x86_cpu, level); 5372 if (ret < 0) { 5373 error_setg_errno(errp, -ret, "Failed to set vCPU events"); 5374 return ret; 5375 } 5376 if (level >= KVM_PUT_RESET_STATE) { 5377 ret = kvm_put_mp_state(x86_cpu); 5378 if (ret < 0) { 5379 error_setg_errno(errp, -ret, "Failed to set MP state"); 5380 return ret; 5381 } 5382 } 5383 5384 ret = kvm_put_tscdeadline_msr(x86_cpu); 5385 if (ret < 0) { 5386 error_setg_errno(errp, -ret, "Failed to set TSC deadline MSR"); 5387 return ret; 5388 } 5389 ret = kvm_put_debugregs(x86_cpu); 5390 if (ret < 0) { 5391 error_setg_errno(errp, -ret, "Failed to set debug registers"); 5392 return ret; 5393 } 5394 return 0; 5395 } 5396 5397 int kvm_arch_get_registers(CPUState *cs, Error **errp) 5398 { 5399 X86CPU *cpu = X86_CPU(cs); 5400 int ret; 5401 5402 assert(cpu_is_stopped(cs) || qemu_cpu_is_self(cs)); 5403 5404 ret = kvm_get_vcpu_events(cpu); 5405 if (ret < 0) { 5406 error_setg_errno(errp, -ret, "Failed to get vCPU events"); 5407 goto out; 5408 } 5409 /* 5410 * KVM_GET_MPSTATE can modify CS and RIP, call it before 5411 * KVM_GET_REGS and KVM_GET_SREGS. 5412 */ 5413 ret = kvm_get_mp_state(cpu); 5414 if (ret < 0) { 5415 error_setg_errno(errp, -ret, "Failed to get MP state"); 5416 goto out; 5417 } 5418 ret = kvm_getput_regs(cpu, 0); 5419 if (ret < 0) { 5420 error_setg_errno(errp, -ret, "Failed to get general purpose registers"); 5421 goto out; 5422 } 5423 ret = kvm_get_xsave(cpu); 5424 if (ret < 0) { 5425 error_setg_errno(errp, -ret, "Failed to get XSAVE"); 5426 goto out; 5427 } 5428 ret = kvm_get_xcrs(cpu); 5429 if (ret < 0) { 5430 error_setg_errno(errp, -ret, "Failed to get XCRs"); 5431 goto out; 5432 } 5433 ret = has_sregs2 ? kvm_get_sregs2(cpu) : kvm_get_sregs(cpu); 5434 if (ret < 0) { 5435 error_setg_errno(errp, -ret, "Failed to get special registers"); 5436 goto out; 5437 } 5438 ret = kvm_get_msrs(cpu); 5439 if (ret < 0) { 5440 error_setg_errno(errp, -ret, "Failed to get MSRs"); 5441 goto out; 5442 } 5443 ret = kvm_get_apic(cpu); 5444 if (ret < 0) { 5445 error_setg_errno(errp, -ret, "Failed to get APIC"); 5446 goto out; 5447 } 5448 ret = kvm_get_debugregs(cpu); 5449 if (ret < 0) { 5450 error_setg_errno(errp, -ret, "Failed to get debug registers"); 5451 goto out; 5452 } 5453 ret = kvm_get_nested_state(cpu); 5454 if (ret < 0) { 5455 error_setg_errno(errp, -ret, "Failed to get nested state"); 5456 goto out; 5457 } 5458 #ifdef CONFIG_XEN_EMU 5459 if (xen_mode == XEN_EMULATE) { 5460 ret = kvm_get_xen_state(cs); 5461 if (ret < 0) { 5462 error_setg_errno(errp, -ret, "Failed to get Xen state"); 5463 goto out; 5464 } 5465 } 5466 #endif 5467 ret = 0; 5468 out: 5469 cpu_sync_bndcs_hflags(&cpu->env); 5470 return ret; 5471 } 5472 5473 void kvm_arch_pre_run(CPUState *cpu, struct kvm_run *run) 5474 { 5475 X86CPU *x86_cpu = X86_CPU(cpu); 5476 CPUX86State *env = &x86_cpu->env; 5477 int ret; 5478 5479 /* Inject NMI */ 5480 if (cpu->interrupt_request & (CPU_INTERRUPT_NMI | CPU_INTERRUPT_SMI)) { 5481 if (cpu->interrupt_request & CPU_INTERRUPT_NMI) { 5482 bql_lock(); 5483 cpu->interrupt_request &= ~CPU_INTERRUPT_NMI; 5484 bql_unlock(); 5485 DPRINTF("injected NMI\n"); 5486 ret = kvm_vcpu_ioctl(cpu, KVM_NMI); 5487 if (ret < 0) { 5488 fprintf(stderr, "KVM: injection failed, NMI lost (%s)\n", 5489 strerror(-ret)); 5490 } 5491 } 5492 if (cpu->interrupt_request & CPU_INTERRUPT_SMI) { 5493 bql_lock(); 5494 cpu->interrupt_request &= ~CPU_INTERRUPT_SMI; 5495 bql_unlock(); 5496 DPRINTF("injected SMI\n"); 5497 ret = kvm_vcpu_ioctl(cpu, KVM_SMI); 5498 if (ret < 0) { 5499 fprintf(stderr, "KVM: injection failed, SMI lost (%s)\n", 5500 strerror(-ret)); 5501 } 5502 } 5503 } 5504 5505 if (!kvm_pic_in_kernel()) { 5506 bql_lock(); 5507 } 5508 5509 /* Force the VCPU out of its inner loop to process any INIT requests 5510 * or (for userspace APIC, but it is cheap to combine the checks here) 5511 * pending TPR access reports. 5512 */ 5513 if (cpu->interrupt_request & (CPU_INTERRUPT_INIT | CPU_INTERRUPT_TPR)) { 5514 if ((cpu->interrupt_request & CPU_INTERRUPT_INIT) && 5515 !(env->hflags & HF_SMM_MASK)) { 5516 cpu->exit_request = 1; 5517 } 5518 if (cpu->interrupt_request & CPU_INTERRUPT_TPR) { 5519 cpu->exit_request = 1; 5520 } 5521 } 5522 5523 if (!kvm_pic_in_kernel()) { 5524 /* Try to inject an interrupt if the guest can accept it */ 5525 if (run->ready_for_interrupt_injection && 5526 (cpu->interrupt_request & CPU_INTERRUPT_HARD) && 5527 (env->eflags & IF_MASK)) { 5528 int irq; 5529 5530 cpu->interrupt_request &= ~CPU_INTERRUPT_HARD; 5531 irq = cpu_get_pic_interrupt(env); 5532 if (irq >= 0) { 5533 struct kvm_interrupt intr; 5534 5535 intr.irq = irq; 5536 DPRINTF("injected interrupt %d\n", irq); 5537 ret = kvm_vcpu_ioctl(cpu, KVM_INTERRUPT, &intr); 5538 if (ret < 0) { 5539 fprintf(stderr, 5540 "KVM: injection failed, interrupt lost (%s)\n", 5541 strerror(-ret)); 5542 } 5543 } 5544 } 5545 5546 /* If we have an interrupt but the guest is not ready to receive an 5547 * interrupt, request an interrupt window exit. This will 5548 * cause a return to userspace as soon as the guest is ready to 5549 * receive interrupts. */ 5550 if ((cpu->interrupt_request & CPU_INTERRUPT_HARD)) { 5551 run->request_interrupt_window = 1; 5552 } else { 5553 run->request_interrupt_window = 0; 5554 } 5555 5556 DPRINTF("setting tpr\n"); 5557 run->cr8 = cpu_get_apic_tpr(x86_cpu->apic_state); 5558 5559 bql_unlock(); 5560 } 5561 } 5562 5563 static void kvm_rate_limit_on_bus_lock(void) 5564 { 5565 uint64_t delay_ns = ratelimit_calculate_delay(&bus_lock_ratelimit_ctrl, 1); 5566 5567 if (delay_ns) { 5568 g_usleep(delay_ns / SCALE_US); 5569 } 5570 } 5571 5572 MemTxAttrs kvm_arch_post_run(CPUState *cpu, struct kvm_run *run) 5573 { 5574 X86CPU *x86_cpu = X86_CPU(cpu); 5575 CPUX86State *env = &x86_cpu->env; 5576 5577 if (run->flags & KVM_RUN_X86_SMM) { 5578 env->hflags |= HF_SMM_MASK; 5579 } else { 5580 env->hflags &= ~HF_SMM_MASK; 5581 } 5582 if (run->if_flag) { 5583 env->eflags |= IF_MASK; 5584 } else { 5585 env->eflags &= ~IF_MASK; 5586 } 5587 if (run->flags & KVM_RUN_X86_BUS_LOCK) { 5588 kvm_rate_limit_on_bus_lock(); 5589 } 5590 5591 #ifdef CONFIG_XEN_EMU 5592 /* 5593 * If the callback is asserted as a GSI (or PCI INTx) then check if 5594 * vcpu_info->evtchn_upcall_pending has been cleared, and deassert 5595 * the callback IRQ if so. Ideally we could hook into the PIC/IOAPIC 5596 * EOI and only resample then, exactly how the VFIO eventfd pairs 5597 * are designed to work for level triggered interrupts. 5598 */ 5599 if (x86_cpu->env.xen_callback_asserted) { 5600 kvm_xen_maybe_deassert_callback(cpu); 5601 } 5602 #endif 5603 5604 /* We need to protect the apic state against concurrent accesses from 5605 * different threads in case the userspace irqchip is used. */ 5606 if (!kvm_irqchip_in_kernel()) { 5607 bql_lock(); 5608 } 5609 cpu_set_apic_tpr(x86_cpu->apic_state, run->cr8); 5610 cpu_set_apic_base(x86_cpu->apic_state, run->apic_base); 5611 if (!kvm_irqchip_in_kernel()) { 5612 bql_unlock(); 5613 } 5614 return cpu_get_mem_attrs(env); 5615 } 5616 5617 int kvm_arch_process_async_events(CPUState *cs) 5618 { 5619 X86CPU *cpu = X86_CPU(cs); 5620 CPUX86State *env = &cpu->env; 5621 5622 if (cs->interrupt_request & CPU_INTERRUPT_MCE) { 5623 /* We must not raise CPU_INTERRUPT_MCE if it's not supported. */ 5624 assert(env->mcg_cap); 5625 5626 cs->interrupt_request &= ~CPU_INTERRUPT_MCE; 5627 5628 kvm_cpu_synchronize_state(cs); 5629 5630 if (env->exception_nr == EXCP08_DBLE) { 5631 /* this means triple fault */ 5632 qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); 5633 cs->exit_request = 1; 5634 return 0; 5635 } 5636 kvm_queue_exception(env, EXCP12_MCHK, 0, 0); 5637 env->has_error_code = 0; 5638 5639 cs->halted = 0; 5640 if (kvm_irqchip_in_kernel() && env->mp_state == KVM_MP_STATE_HALTED) { 5641 env->mp_state = KVM_MP_STATE_RUNNABLE; 5642 } 5643 } 5644 5645 if ((cs->interrupt_request & CPU_INTERRUPT_INIT) && 5646 !(env->hflags & HF_SMM_MASK)) { 5647 kvm_cpu_synchronize_state(cs); 5648 do_cpu_init(cpu); 5649 } 5650 5651 if (kvm_irqchip_in_kernel()) { 5652 return 0; 5653 } 5654 5655 if (cs->interrupt_request & CPU_INTERRUPT_POLL) { 5656 cs->interrupt_request &= ~CPU_INTERRUPT_POLL; 5657 apic_poll_irq(cpu->apic_state); 5658 } 5659 if (((cs->interrupt_request & CPU_INTERRUPT_HARD) && 5660 (env->eflags & IF_MASK)) || 5661 (cs->interrupt_request & CPU_INTERRUPT_NMI)) { 5662 cs->halted = 0; 5663 } 5664 if (cs->interrupt_request & CPU_INTERRUPT_SIPI) { 5665 cpu_reset_interrupt(cs, CPU_INTERRUPT_SIPI); 5666 kvm_cpu_synchronize_state(cs); 5667 do_cpu_sipi(cpu); 5668 } 5669 if (cs->interrupt_request & CPU_INTERRUPT_TPR) { 5670 cs->interrupt_request &= ~CPU_INTERRUPT_TPR; 5671 kvm_cpu_synchronize_state(cs); 5672 apic_handle_tpr_access_report(cpu->apic_state, env->eip, 5673 env->tpr_access_type); 5674 } 5675 5676 return cs->halted; 5677 } 5678 5679 static int kvm_handle_halt(X86CPU *cpu) 5680 { 5681 CPUState *cs = CPU(cpu); 5682 CPUX86State *env = &cpu->env; 5683 5684 if (!((cs->interrupt_request & CPU_INTERRUPT_HARD) && 5685 (env->eflags & IF_MASK)) && 5686 !(cs->interrupt_request & CPU_INTERRUPT_NMI)) { 5687 cs->halted = 1; 5688 return EXCP_HLT; 5689 } 5690 5691 return 0; 5692 } 5693 5694 static int kvm_handle_tpr_access(X86CPU *cpu) 5695 { 5696 CPUState *cs = CPU(cpu); 5697 struct kvm_run *run = cs->kvm_run; 5698 5699 apic_handle_tpr_access_report(cpu->apic_state, run->tpr_access.rip, 5700 run->tpr_access.is_write ? TPR_ACCESS_WRITE 5701 : TPR_ACCESS_READ); 5702 return 1; 5703 } 5704 5705 int kvm_arch_insert_sw_breakpoint(CPUState *cs, struct kvm_sw_breakpoint *bp) 5706 { 5707 static const uint8_t int3 = 0xcc; 5708 5709 if (cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)&bp->saved_insn, 1, 0) || 5710 cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)&int3, 1, 1)) { 5711 return -EINVAL; 5712 } 5713 return 0; 5714 } 5715 5716 int kvm_arch_remove_sw_breakpoint(CPUState *cs, struct kvm_sw_breakpoint *bp) 5717 { 5718 uint8_t int3; 5719 5720 if (cpu_memory_rw_debug(cs, bp->pc, &int3, 1, 0)) { 5721 return -EINVAL; 5722 } 5723 if (int3 != 0xcc) { 5724 return 0; 5725 } 5726 if (cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)&bp->saved_insn, 1, 1)) { 5727 return -EINVAL; 5728 } 5729 return 0; 5730 } 5731 5732 static struct { 5733 target_ulong addr; 5734 int len; 5735 int type; 5736 } hw_breakpoint[4]; 5737 5738 static int nb_hw_breakpoint; 5739 5740 static int find_hw_breakpoint(target_ulong addr, int len, int type) 5741 { 5742 int n; 5743 5744 for (n = 0; n < nb_hw_breakpoint; n++) { 5745 if (hw_breakpoint[n].addr == addr && hw_breakpoint[n].type == type && 5746 (hw_breakpoint[n].len == len || len == -1)) { 5747 return n; 5748 } 5749 } 5750 return -1; 5751 } 5752 5753 int kvm_arch_insert_hw_breakpoint(vaddr addr, vaddr len, int type) 5754 { 5755 switch (type) { 5756 case GDB_BREAKPOINT_HW: 5757 len = 1; 5758 break; 5759 case GDB_WATCHPOINT_WRITE: 5760 case GDB_WATCHPOINT_ACCESS: 5761 switch (len) { 5762 case 1: 5763 break; 5764 case 2: 5765 case 4: 5766 case 8: 5767 if (addr & (len - 1)) { 5768 return -EINVAL; 5769 } 5770 break; 5771 default: 5772 return -EINVAL; 5773 } 5774 break; 5775 default: 5776 return -ENOSYS; 5777 } 5778 5779 if (nb_hw_breakpoint == 4) { 5780 return -ENOBUFS; 5781 } 5782 if (find_hw_breakpoint(addr, len, type) >= 0) { 5783 return -EEXIST; 5784 } 5785 hw_breakpoint[nb_hw_breakpoint].addr = addr; 5786 hw_breakpoint[nb_hw_breakpoint].len = len; 5787 hw_breakpoint[nb_hw_breakpoint].type = type; 5788 nb_hw_breakpoint++; 5789 5790 return 0; 5791 } 5792 5793 int kvm_arch_remove_hw_breakpoint(vaddr addr, vaddr len, int type) 5794 { 5795 int n; 5796 5797 n = find_hw_breakpoint(addr, (type == GDB_BREAKPOINT_HW) ? 1 : len, type); 5798 if (n < 0) { 5799 return -ENOENT; 5800 } 5801 nb_hw_breakpoint--; 5802 hw_breakpoint[n] = hw_breakpoint[nb_hw_breakpoint]; 5803 5804 return 0; 5805 } 5806 5807 void kvm_arch_remove_all_hw_breakpoints(void) 5808 { 5809 nb_hw_breakpoint = 0; 5810 } 5811 5812 static CPUWatchpoint hw_watchpoint; 5813 5814 static int kvm_handle_debug(X86CPU *cpu, 5815 struct kvm_debug_exit_arch *arch_info) 5816 { 5817 CPUState *cs = CPU(cpu); 5818 CPUX86State *env = &cpu->env; 5819 int ret = 0; 5820 int n; 5821 5822 if (arch_info->exception == EXCP01_DB) { 5823 if (arch_info->dr6 & DR6_BS) { 5824 if (cs->singlestep_enabled) { 5825 ret = EXCP_DEBUG; 5826 } 5827 } else { 5828 for (n = 0; n < 4; n++) { 5829 if (arch_info->dr6 & (1 << n)) { 5830 switch ((arch_info->dr7 >> (16 + n*4)) & 0x3) { 5831 case 0x0: 5832 ret = EXCP_DEBUG; 5833 break; 5834 case 0x1: 5835 ret = EXCP_DEBUG; 5836 cs->watchpoint_hit = &hw_watchpoint; 5837 hw_watchpoint.vaddr = hw_breakpoint[n].addr; 5838 hw_watchpoint.flags = BP_MEM_WRITE; 5839 break; 5840 case 0x3: 5841 ret = EXCP_DEBUG; 5842 cs->watchpoint_hit = &hw_watchpoint; 5843 hw_watchpoint.vaddr = hw_breakpoint[n].addr; 5844 hw_watchpoint.flags = BP_MEM_ACCESS; 5845 break; 5846 } 5847 } 5848 } 5849 } 5850 } else if (kvm_find_sw_breakpoint(cs, arch_info->pc)) { 5851 ret = EXCP_DEBUG; 5852 } 5853 if (ret == 0) { 5854 cpu_synchronize_state(cs); 5855 assert(env->exception_nr == -1); 5856 5857 /* pass to guest */ 5858 kvm_queue_exception(env, arch_info->exception, 5859 arch_info->exception == EXCP01_DB, 5860 arch_info->dr6); 5861 env->has_error_code = 0; 5862 } 5863 5864 return ret; 5865 } 5866 5867 void kvm_arch_update_guest_debug(CPUState *cpu, struct kvm_guest_debug *dbg) 5868 { 5869 const uint8_t type_code[] = { 5870 [GDB_BREAKPOINT_HW] = 0x0, 5871 [GDB_WATCHPOINT_WRITE] = 0x1, 5872 [GDB_WATCHPOINT_ACCESS] = 0x3 5873 }; 5874 const uint8_t len_code[] = { 5875 [1] = 0x0, [2] = 0x1, [4] = 0x3, [8] = 0x2 5876 }; 5877 int n; 5878 5879 if (kvm_sw_breakpoints_active(cpu)) { 5880 dbg->control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_SW_BP; 5881 } 5882 if (nb_hw_breakpoint > 0) { 5883 dbg->control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_HW_BP; 5884 dbg->arch.debugreg[7] = 0x0600; 5885 for (n = 0; n < nb_hw_breakpoint; n++) { 5886 dbg->arch.debugreg[n] = hw_breakpoint[n].addr; 5887 dbg->arch.debugreg[7] |= (2 << (n * 2)) | 5888 (type_code[hw_breakpoint[n].type] << (16 + n*4)) | 5889 ((uint32_t)len_code[hw_breakpoint[n].len] << (18 + n*4)); 5890 } 5891 } 5892 } 5893 5894 static int kvm_install_msr_filters(KVMState *s) 5895 { 5896 uint64_t zero = 0; 5897 struct kvm_msr_filter filter = { 5898 .flags = KVM_MSR_FILTER_DEFAULT_ALLOW, 5899 }; 5900 int i, j = 0; 5901 5902 QEMU_BUILD_BUG_ON(ARRAY_SIZE(msr_handlers) != ARRAY_SIZE(filter.ranges)); 5903 for (i = 0; i < ARRAY_SIZE(msr_handlers); i++) { 5904 KVMMSRHandlers *handler = &msr_handlers[i]; 5905 if (handler->msr) { 5906 struct kvm_msr_filter_range *range = &filter.ranges[j++]; 5907 5908 *range = (struct kvm_msr_filter_range) { 5909 .flags = 0, 5910 .nmsrs = 1, 5911 .base = handler->msr, 5912 .bitmap = (__u8 *)&zero, 5913 }; 5914 5915 if (handler->rdmsr) { 5916 range->flags |= KVM_MSR_FILTER_READ; 5917 } 5918 5919 if (handler->wrmsr) { 5920 range->flags |= KVM_MSR_FILTER_WRITE; 5921 } 5922 } 5923 } 5924 5925 return kvm_vm_ioctl(s, KVM_X86_SET_MSR_FILTER, &filter); 5926 } 5927 5928 static int kvm_filter_msr(KVMState *s, uint32_t msr, QEMURDMSRHandler *rdmsr, 5929 QEMUWRMSRHandler *wrmsr) 5930 { 5931 int i, ret; 5932 5933 for (i = 0; i < ARRAY_SIZE(msr_handlers); i++) { 5934 if (!msr_handlers[i].msr) { 5935 msr_handlers[i] = (KVMMSRHandlers) { 5936 .msr = msr, 5937 .rdmsr = rdmsr, 5938 .wrmsr = wrmsr, 5939 }; 5940 5941 ret = kvm_install_msr_filters(s); 5942 if (ret) { 5943 msr_handlers[i] = (KVMMSRHandlers) { }; 5944 return ret; 5945 } 5946 5947 return 0; 5948 } 5949 } 5950 5951 return -EINVAL; 5952 } 5953 5954 static int kvm_handle_rdmsr(X86CPU *cpu, struct kvm_run *run) 5955 { 5956 int i; 5957 bool r; 5958 5959 for (i = 0; i < ARRAY_SIZE(msr_handlers); i++) { 5960 KVMMSRHandlers *handler = &msr_handlers[i]; 5961 if (run->msr.index == handler->msr) { 5962 if (handler->rdmsr) { 5963 r = handler->rdmsr(cpu, handler->msr, 5964 (uint64_t *)&run->msr.data); 5965 run->msr.error = r ? 0 : 1; 5966 return 0; 5967 } 5968 } 5969 } 5970 5971 g_assert_not_reached(); 5972 } 5973 5974 static int kvm_handle_wrmsr(X86CPU *cpu, struct kvm_run *run) 5975 { 5976 int i; 5977 bool r; 5978 5979 for (i = 0; i < ARRAY_SIZE(msr_handlers); i++) { 5980 KVMMSRHandlers *handler = &msr_handlers[i]; 5981 if (run->msr.index == handler->msr) { 5982 if (handler->wrmsr) { 5983 r = handler->wrmsr(cpu, handler->msr, run->msr.data); 5984 run->msr.error = r ? 0 : 1; 5985 return 0; 5986 } 5987 } 5988 } 5989 5990 g_assert_not_reached(); 5991 } 5992 5993 static bool has_sgx_provisioning; 5994 5995 static bool __kvm_enable_sgx_provisioning(KVMState *s) 5996 { 5997 int fd, ret; 5998 5999 if (!kvm_vm_check_extension(s, KVM_CAP_SGX_ATTRIBUTE)) { 6000 return false; 6001 } 6002 6003 fd = qemu_open_old("/dev/sgx_provision", O_RDONLY); 6004 if (fd < 0) { 6005 return false; 6006 } 6007 6008 ret = kvm_vm_enable_cap(s, KVM_CAP_SGX_ATTRIBUTE, 0, fd); 6009 if (ret) { 6010 error_report("Could not enable SGX PROVISIONKEY: %s", strerror(-ret)); 6011 exit(1); 6012 } 6013 close(fd); 6014 return true; 6015 } 6016 6017 bool kvm_enable_sgx_provisioning(KVMState *s) 6018 { 6019 return MEMORIZE(__kvm_enable_sgx_provisioning(s), has_sgx_provisioning); 6020 } 6021 6022 static bool host_supports_vmx(void) 6023 { 6024 uint32_t ecx, unused; 6025 6026 host_cpuid(1, 0, &unused, &unused, &ecx, &unused); 6027 return ecx & CPUID_EXT_VMX; 6028 } 6029 6030 /* 6031 * Currently the handling here only supports use of KVM_HC_MAP_GPA_RANGE 6032 * to service guest-initiated memory attribute update requests so that 6033 * KVM_SET_MEMORY_ATTRIBUTES can update whether or not a page should be 6034 * backed by the private memory pool provided by guest_memfd, and as such 6035 * is only applicable to guest_memfd-backed guests (e.g. SNP/TDX). 6036 * 6037 * Other other use-cases for KVM_HC_MAP_GPA_RANGE, such as for SEV live 6038 * migration, are not implemented here currently. 6039 * 6040 * For the guest_memfd use-case, these exits will generally be synthesized 6041 * by KVM based on platform-specific hypercalls, like GHCB requests in the 6042 * case of SEV-SNP, and not issued directly within the guest though the 6043 * KVM_HC_MAP_GPA_RANGE hypercall. So in this case, KVM_HC_MAP_GPA_RANGE is 6044 * not actually advertised to guests via the KVM CPUID feature bit, as 6045 * opposed to SEV live migration where it would be. Since it is unlikely the 6046 * SEV live migration use-case would be useful for guest-memfd backed guests, 6047 * because private/shared page tracking is already provided through other 6048 * means, these 2 use-cases should be treated as being mutually-exclusive. 6049 */ 6050 static int kvm_handle_hc_map_gpa_range(X86CPU *cpu, struct kvm_run *run) 6051 { 6052 struct kvm_pre_fault_memory mem; 6053 uint64_t gpa, size, attributes; 6054 int ret; 6055 6056 if (!machine_require_guest_memfd(current_machine)) 6057 return -EINVAL; 6058 6059 gpa = run->hypercall.args[0]; 6060 size = run->hypercall.args[1] * TARGET_PAGE_SIZE; 6061 attributes = run->hypercall.args[2]; 6062 6063 trace_kvm_hc_map_gpa_range(gpa, size, attributes, run->hypercall.flags); 6064 6065 ret = kvm_convert_memory(gpa, size, attributes & KVM_MAP_GPA_RANGE_ENCRYPTED); 6066 if (ret || !kvm_pre_fault_memory_supported) { 6067 return ret; 6068 } 6069 6070 /* 6071 * Opportunistically pre-fault memory in. Failures are ignored so that any 6072 * errors in faulting in the memory will get captured in KVM page fault 6073 * path when the guest first accesses the page. 6074 */ 6075 memset(&mem, 0, sizeof(mem)); 6076 mem.gpa = gpa; 6077 mem.size = size; 6078 while (mem.size) { 6079 if (kvm_vcpu_ioctl(CPU(cpu), KVM_PRE_FAULT_MEMORY, &mem)) { 6080 break; 6081 } 6082 } 6083 6084 return 0; 6085 } 6086 6087 static int kvm_handle_hypercall(X86CPU *cpu, struct kvm_run *run) 6088 { 6089 if (run->hypercall.nr == KVM_HC_MAP_GPA_RANGE) 6090 return kvm_handle_hc_map_gpa_range(cpu, run); 6091 6092 return -EINVAL; 6093 } 6094 6095 #define VMX_INVALID_GUEST_STATE 0x80000021 6096 6097 int kvm_arch_handle_exit(CPUState *cs, struct kvm_run *run) 6098 { 6099 X86CPU *cpu = X86_CPU(cs); 6100 uint64_t code; 6101 int ret; 6102 bool ctx_invalid; 6103 KVMState *state; 6104 6105 switch (run->exit_reason) { 6106 case KVM_EXIT_HLT: 6107 DPRINTF("handle_hlt\n"); 6108 bql_lock(); 6109 ret = kvm_handle_halt(cpu); 6110 bql_unlock(); 6111 break; 6112 case KVM_EXIT_SET_TPR: 6113 ret = 0; 6114 break; 6115 case KVM_EXIT_TPR_ACCESS: 6116 bql_lock(); 6117 ret = kvm_handle_tpr_access(cpu); 6118 bql_unlock(); 6119 break; 6120 case KVM_EXIT_FAIL_ENTRY: 6121 code = run->fail_entry.hardware_entry_failure_reason; 6122 fprintf(stderr, "KVM: entry failed, hardware error 0x%" PRIx64 "\n", 6123 code); 6124 if (host_supports_vmx() && code == VMX_INVALID_GUEST_STATE) { 6125 fprintf(stderr, 6126 "\nIf you're running a guest on an Intel machine without " 6127 "unrestricted mode\n" 6128 "support, the failure can be most likely due to the guest " 6129 "entering an invalid\n" 6130 "state for Intel VT. For example, the guest maybe running " 6131 "in big real mode\n" 6132 "which is not supported on less recent Intel processors." 6133 "\n\n"); 6134 } 6135 ret = -1; 6136 break; 6137 case KVM_EXIT_EXCEPTION: 6138 fprintf(stderr, "KVM: exception %d exit (error code 0x%x)\n", 6139 run->ex.exception, run->ex.error_code); 6140 ret = -1; 6141 break; 6142 case KVM_EXIT_DEBUG: 6143 DPRINTF("kvm_exit_debug\n"); 6144 bql_lock(); 6145 ret = kvm_handle_debug(cpu, &run->debug.arch); 6146 bql_unlock(); 6147 break; 6148 case KVM_EXIT_HYPERV: 6149 ret = kvm_hv_handle_exit(cpu, &run->hyperv); 6150 break; 6151 case KVM_EXIT_IOAPIC_EOI: 6152 ioapic_eoi_broadcast(run->eoi.vector); 6153 ret = 0; 6154 break; 6155 case KVM_EXIT_X86_BUS_LOCK: 6156 /* already handled in kvm_arch_post_run */ 6157 ret = 0; 6158 break; 6159 case KVM_EXIT_NOTIFY: 6160 ctx_invalid = !!(run->notify.flags & KVM_NOTIFY_CONTEXT_INVALID); 6161 state = KVM_STATE(current_accel()); 6162 if (ctx_invalid || 6163 state->notify_vmexit == NOTIFY_VMEXIT_OPTION_INTERNAL_ERROR) { 6164 warn_report("KVM internal error: Encountered a notify exit " 6165 "with invalid context in guest."); 6166 ret = -1; 6167 } else { 6168 warn_report_once("KVM: Encountered a notify exit with valid " 6169 "context in guest. " 6170 "The guest could be misbehaving."); 6171 ret = 0; 6172 } 6173 break; 6174 case KVM_EXIT_X86_RDMSR: 6175 /* We only enable MSR filtering, any other exit is bogus */ 6176 assert(run->msr.reason == KVM_MSR_EXIT_REASON_FILTER); 6177 ret = kvm_handle_rdmsr(cpu, run); 6178 break; 6179 case KVM_EXIT_X86_WRMSR: 6180 /* We only enable MSR filtering, any other exit is bogus */ 6181 assert(run->msr.reason == KVM_MSR_EXIT_REASON_FILTER); 6182 ret = kvm_handle_wrmsr(cpu, run); 6183 break; 6184 #ifdef CONFIG_XEN_EMU 6185 case KVM_EXIT_XEN: 6186 ret = kvm_xen_handle_exit(cpu, &run->xen); 6187 break; 6188 #endif 6189 case KVM_EXIT_HYPERCALL: 6190 ret = kvm_handle_hypercall(cpu, run); 6191 break; 6192 case KVM_EXIT_SYSTEM_EVENT: 6193 switch (run->system_event.type) { 6194 case KVM_SYSTEM_EVENT_TDX_FATAL: 6195 ret = tdx_handle_report_fatal_error(cpu, run); 6196 break; 6197 default: 6198 ret = -1; 6199 break; 6200 } 6201 break; 6202 case KVM_EXIT_TDX: 6203 /* 6204 * run->tdx is already set up for the case where userspace 6205 * does not handle the TDVMCALL. 6206 */ 6207 switch (run->tdx.nr) { 6208 case TDVMCALL_GET_QUOTE: 6209 tdx_handle_get_quote(cpu, run); 6210 break; 6211 case TDVMCALL_GET_TD_VM_CALL_INFO: 6212 tdx_handle_get_tdvmcall_info(cpu, run); 6213 break; 6214 case TDVMCALL_SETUP_EVENT_NOTIFY_INTERRUPT: 6215 tdx_handle_setup_event_notify_interrupt(cpu, run); 6216 break; 6217 } 6218 ret = 0; 6219 break; 6220 default: 6221 fprintf(stderr, "KVM: unknown exit reason %d\n", run->exit_reason); 6222 ret = -1; 6223 break; 6224 } 6225 6226 return ret; 6227 } 6228 6229 bool kvm_arch_stop_on_emulation_error(CPUState *cs) 6230 { 6231 X86CPU *cpu = X86_CPU(cs); 6232 CPUX86State *env = &cpu->env; 6233 6234 kvm_cpu_synchronize_state(cs); 6235 return !(env->cr[0] & CR0_PE_MASK) || 6236 ((env->segs[R_CS].selector & 3) != 3); 6237 } 6238 6239 void kvm_arch_init_irq_routing(KVMState *s) 6240 { 6241 /* We know at this point that we're using the in-kernel 6242 * irqchip, so we can use irqfds, and on x86 we know 6243 * we can use msi via irqfd and GSI routing. 6244 */ 6245 kvm_msi_via_irqfd_allowed = true; 6246 kvm_gsi_routing_allowed = true; 6247 6248 if (kvm_irqchip_is_split()) { 6249 KVMRouteChange c = kvm_irqchip_begin_route_changes(s); 6250 int i; 6251 6252 /* If the ioapic is in QEMU and the lapics are in KVM, reserve 6253 MSI routes for signaling interrupts to the local apics. */ 6254 for (i = 0; i < IOAPIC_NUM_PINS; i++) { 6255 if (kvm_irqchip_add_msi_route(&c, 0, NULL) < 0) { 6256 error_report("Could not enable split IRQ mode."); 6257 exit(1); 6258 } 6259 } 6260 kvm_irqchip_commit_route_changes(&c); 6261 } 6262 } 6263 6264 int kvm_arch_irqchip_create(KVMState *s) 6265 { 6266 int ret; 6267 if (kvm_kernel_irqchip_split()) { 6268 ret = kvm_vm_enable_cap(s, KVM_CAP_SPLIT_IRQCHIP, 0, 24); 6269 if (ret) { 6270 error_report("Could not enable split irqchip mode: %s", 6271 strerror(-ret)); 6272 exit(1); 6273 } else { 6274 DPRINTF("Enabled KVM_CAP_SPLIT_IRQCHIP\n"); 6275 kvm_split_irqchip = true; 6276 return 1; 6277 } 6278 } else { 6279 return 0; 6280 } 6281 } 6282 6283 uint64_t kvm_swizzle_msi_ext_dest_id(uint64_t address) 6284 { 6285 CPUX86State *env; 6286 uint64_t ext_id; 6287 6288 if (!first_cpu) { 6289 return address; 6290 } 6291 env = &X86_CPU(first_cpu)->env; 6292 if (!(env->features[FEAT_KVM] & CPUID_KVM_MSI_EXT_DEST_ID)) { 6293 return address; 6294 } 6295 6296 /* 6297 * If the remappable format bit is set, or the upper bits are 6298 * already set in address_hi, or the low extended bits aren't 6299 * there anyway, do nothing. 6300 */ 6301 ext_id = address & (0xff << MSI_ADDR_DEST_IDX_SHIFT); 6302 if (!ext_id || (ext_id & (1 << MSI_ADDR_DEST_IDX_SHIFT)) || (address >> 32)) { 6303 return address; 6304 } 6305 6306 address &= ~ext_id; 6307 address |= ext_id << 35; 6308 return address; 6309 } 6310 6311 int kvm_arch_fixup_msi_route(struct kvm_irq_routing_entry *route, 6312 uint64_t address, uint32_t data, PCIDevice *dev) 6313 { 6314 X86IOMMUState *iommu = x86_iommu_get_default(); 6315 6316 if (iommu) { 6317 X86IOMMUClass *class = X86_IOMMU_DEVICE_GET_CLASS(iommu); 6318 6319 if (class->int_remap) { 6320 int ret; 6321 MSIMessage src, dst; 6322 6323 src.address = route->u.msi.address_hi; 6324 src.address <<= VTD_MSI_ADDR_HI_SHIFT; 6325 src.address |= route->u.msi.address_lo; 6326 src.data = route->u.msi.data; 6327 6328 ret = class->int_remap(iommu, &src, &dst, dev ? \ 6329 pci_requester_id(dev) : \ 6330 X86_IOMMU_SID_INVALID); 6331 if (ret) { 6332 trace_kvm_x86_fixup_msi_error(route->gsi); 6333 return 1; 6334 } 6335 6336 /* 6337 * Handled untranslated compatibility format interrupt with 6338 * extended destination ID in the low bits 11-5. */ 6339 dst.address = kvm_swizzle_msi_ext_dest_id(dst.address); 6340 6341 route->u.msi.address_hi = dst.address >> VTD_MSI_ADDR_HI_SHIFT; 6342 route->u.msi.address_lo = dst.address & VTD_MSI_ADDR_LO_MASK; 6343 route->u.msi.data = dst.data; 6344 return 0; 6345 } 6346 } 6347 6348 #ifdef CONFIG_XEN_EMU 6349 if (xen_mode == XEN_EMULATE) { 6350 int handled = xen_evtchn_translate_pirq_msi(route, address, data); 6351 6352 /* 6353 * If it was a PIRQ and successfully routed (handled == 0) or it was 6354 * an error (handled < 0), return. If it wasn't a PIRQ, keep going. 6355 */ 6356 if (handled <= 0) { 6357 return handled; 6358 } 6359 } 6360 #endif 6361 6362 address = kvm_swizzle_msi_ext_dest_id(address); 6363 route->u.msi.address_hi = address >> VTD_MSI_ADDR_HI_SHIFT; 6364 route->u.msi.address_lo = address & VTD_MSI_ADDR_LO_MASK; 6365 return 0; 6366 } 6367 6368 typedef struct MSIRouteEntry MSIRouteEntry; 6369 6370 struct MSIRouteEntry { 6371 PCIDevice *dev; /* Device pointer */ 6372 int vector; /* MSI/MSIX vector index */ 6373 int virq; /* Virtual IRQ index */ 6374 QLIST_ENTRY(MSIRouteEntry) list; 6375 }; 6376 6377 /* List of used GSI routes */ 6378 static QLIST_HEAD(, MSIRouteEntry) msi_route_list = \ 6379 QLIST_HEAD_INITIALIZER(msi_route_list); 6380 6381 void kvm_update_msi_routes_all(void *private, bool global, 6382 uint32_t index, uint32_t mask) 6383 { 6384 int cnt = 0, vector; 6385 MSIRouteEntry *entry; 6386 MSIMessage msg; 6387 PCIDevice *dev; 6388 6389 /* TODO: explicit route update */ 6390 QLIST_FOREACH(entry, &msi_route_list, list) { 6391 cnt++; 6392 vector = entry->vector; 6393 dev = entry->dev; 6394 if (msix_enabled(dev) && !msix_is_masked(dev, vector)) { 6395 msg = msix_get_message(dev, vector); 6396 } else if (msi_enabled(dev) && !msi_is_masked(dev, vector)) { 6397 msg = msi_get_message(dev, vector); 6398 } else { 6399 /* 6400 * Either MSI/MSIX is disabled for the device, or the 6401 * specific message was masked out. Skip this one. 6402 */ 6403 continue; 6404 } 6405 kvm_irqchip_update_msi_route(kvm_state, entry->virq, msg, dev); 6406 } 6407 kvm_irqchip_commit_routes(kvm_state); 6408 trace_kvm_x86_update_msi_routes(cnt); 6409 } 6410 6411 int kvm_arch_add_msi_route_post(struct kvm_irq_routing_entry *route, 6412 int vector, PCIDevice *dev) 6413 { 6414 static bool notify_list_inited = false; 6415 MSIRouteEntry *entry; 6416 6417 if (!dev) { 6418 /* These are (possibly) IOAPIC routes only used for split 6419 * kernel irqchip mode, while what we are housekeeping are 6420 * PCI devices only. */ 6421 return 0; 6422 } 6423 6424 entry = g_new0(MSIRouteEntry, 1); 6425 entry->dev = dev; 6426 entry->vector = vector; 6427 entry->virq = route->gsi; 6428 QLIST_INSERT_HEAD(&msi_route_list, entry, list); 6429 6430 trace_kvm_x86_add_msi_route(route->gsi); 6431 6432 if (!notify_list_inited) { 6433 /* For the first time we do add route, add ourselves into 6434 * IOMMU's IEC notify list if needed. */ 6435 X86IOMMUState *iommu = x86_iommu_get_default(); 6436 if (iommu) { 6437 x86_iommu_iec_register_notifier(iommu, 6438 kvm_update_msi_routes_all, 6439 NULL); 6440 } 6441 notify_list_inited = true; 6442 } 6443 return 0; 6444 } 6445 6446 int kvm_arch_release_virq_post(int virq) 6447 { 6448 MSIRouteEntry *entry, *next; 6449 QLIST_FOREACH_SAFE(entry, &msi_route_list, list, next) { 6450 if (entry->virq == virq) { 6451 trace_kvm_x86_remove_msi_route(virq); 6452 QLIST_REMOVE(entry, list); 6453 g_free(entry); 6454 break; 6455 } 6456 } 6457 return 0; 6458 } 6459 6460 int kvm_arch_msi_data_to_gsi(uint32_t data) 6461 { 6462 abort(); 6463 } 6464 6465 bool kvm_has_waitpkg(void) 6466 { 6467 return has_msr_umwait; 6468 } 6469 6470 #define ARCH_REQ_XCOMP_GUEST_PERM 0x1025 6471 6472 void kvm_request_xsave_components(X86CPU *cpu, uint64_t mask) 6473 { 6474 KVMState *s = kvm_state; 6475 uint64_t supported; 6476 6477 mask &= XSTATE_DYNAMIC_MASK; 6478 if (!mask) { 6479 return; 6480 } 6481 /* 6482 * Just ignore bits that are not in CPUID[EAX=0xD,ECX=0]. 6483 * ARCH_REQ_XCOMP_GUEST_PERM would fail, and QEMU has warned 6484 * about them already because they are not supported features. 6485 */ 6486 supported = kvm_arch_get_supported_cpuid(s, 0xd, 0, R_EAX); 6487 supported |= (uint64_t)kvm_arch_get_supported_cpuid(s, 0xd, 0, R_EDX) << 32; 6488 mask &= supported; 6489 6490 while (mask) { 6491 int bit = ctz64(mask); 6492 int rc = syscall(SYS_arch_prctl, ARCH_REQ_XCOMP_GUEST_PERM, bit); 6493 if (rc) { 6494 /* 6495 * Older kernel version (<5.17) do not support 6496 * ARCH_REQ_XCOMP_GUEST_PERM, but also do not return 6497 * any dynamic feature from kvm_arch_get_supported_cpuid. 6498 */ 6499 warn_report("prctl(ARCH_REQ_XCOMP_GUEST_PERM) failure " 6500 "for feature bit %d", bit); 6501 } 6502 mask &= ~BIT_ULL(bit); 6503 } 6504 } 6505 6506 static int kvm_arch_get_notify_vmexit(Object *obj, Error **errp) 6507 { 6508 KVMState *s = KVM_STATE(obj); 6509 return s->notify_vmexit; 6510 } 6511 6512 static void kvm_arch_set_notify_vmexit(Object *obj, int value, Error **errp) 6513 { 6514 KVMState *s = KVM_STATE(obj); 6515 6516 if (s->fd != -1) { 6517 error_setg(errp, "Cannot set properties after the accelerator has been initialized"); 6518 return; 6519 } 6520 6521 s->notify_vmexit = value; 6522 } 6523 6524 static void kvm_arch_get_notify_window(Object *obj, Visitor *v, 6525 const char *name, void *opaque, 6526 Error **errp) 6527 { 6528 KVMState *s = KVM_STATE(obj); 6529 uint32_t value = s->notify_window; 6530 6531 visit_type_uint32(v, name, &value, errp); 6532 } 6533 6534 static void kvm_arch_set_notify_window(Object *obj, Visitor *v, 6535 const char *name, void *opaque, 6536 Error **errp) 6537 { 6538 KVMState *s = KVM_STATE(obj); 6539 uint32_t value; 6540 6541 if (s->fd != -1) { 6542 error_setg(errp, "Cannot set properties after the accelerator has been initialized"); 6543 return; 6544 } 6545 6546 if (!visit_type_uint32(v, name, &value, errp)) { 6547 return; 6548 } 6549 6550 s->notify_window = value; 6551 } 6552 6553 static void kvm_arch_get_xen_version(Object *obj, Visitor *v, 6554 const char *name, void *opaque, 6555 Error **errp) 6556 { 6557 KVMState *s = KVM_STATE(obj); 6558 uint32_t value = s->xen_version; 6559 6560 visit_type_uint32(v, name, &value, errp); 6561 } 6562 6563 static void kvm_arch_set_xen_version(Object *obj, Visitor *v, 6564 const char *name, void *opaque, 6565 Error **errp) 6566 { 6567 KVMState *s = KVM_STATE(obj); 6568 Error *error = NULL; 6569 uint32_t value; 6570 6571 visit_type_uint32(v, name, &value, &error); 6572 if (error) { 6573 error_propagate(errp, error); 6574 return; 6575 } 6576 6577 s->xen_version = value; 6578 if (value && xen_mode == XEN_DISABLED) { 6579 xen_mode = XEN_EMULATE; 6580 } 6581 } 6582 6583 static void kvm_arch_get_xen_gnttab_max_frames(Object *obj, Visitor *v, 6584 const char *name, void *opaque, 6585 Error **errp) 6586 { 6587 KVMState *s = KVM_STATE(obj); 6588 uint16_t value = s->xen_gnttab_max_frames; 6589 6590 visit_type_uint16(v, name, &value, errp); 6591 } 6592 6593 static void kvm_arch_set_xen_gnttab_max_frames(Object *obj, Visitor *v, 6594 const char *name, void *opaque, 6595 Error **errp) 6596 { 6597 KVMState *s = KVM_STATE(obj); 6598 Error *error = NULL; 6599 uint16_t value; 6600 6601 visit_type_uint16(v, name, &value, &error); 6602 if (error) { 6603 error_propagate(errp, error); 6604 return; 6605 } 6606 6607 s->xen_gnttab_max_frames = value; 6608 } 6609 6610 static void kvm_arch_get_xen_evtchn_max_pirq(Object *obj, Visitor *v, 6611 const char *name, void *opaque, 6612 Error **errp) 6613 { 6614 KVMState *s = KVM_STATE(obj); 6615 uint16_t value = s->xen_evtchn_max_pirq; 6616 6617 visit_type_uint16(v, name, &value, errp); 6618 } 6619 6620 static void kvm_arch_set_xen_evtchn_max_pirq(Object *obj, Visitor *v, 6621 const char *name, void *opaque, 6622 Error **errp) 6623 { 6624 KVMState *s = KVM_STATE(obj); 6625 Error *error = NULL; 6626 uint16_t value; 6627 6628 visit_type_uint16(v, name, &value, &error); 6629 if (error) { 6630 error_propagate(errp, error); 6631 return; 6632 } 6633 6634 s->xen_evtchn_max_pirq = value; 6635 } 6636 6637 void kvm_arch_accel_class_init(ObjectClass *oc) 6638 { 6639 object_class_property_add_enum(oc, "notify-vmexit", "NotifyVMexitOption", 6640 &NotifyVmexitOption_lookup, 6641 kvm_arch_get_notify_vmexit, 6642 kvm_arch_set_notify_vmexit); 6643 object_class_property_set_description(oc, "notify-vmexit", 6644 "Enable notify VM exit"); 6645 6646 object_class_property_add(oc, "notify-window", "uint32", 6647 kvm_arch_get_notify_window, 6648 kvm_arch_set_notify_window, 6649 NULL, NULL); 6650 object_class_property_set_description(oc, "notify-window", 6651 "Clock cycles without an event window " 6652 "after which a notification VM exit occurs"); 6653 6654 object_class_property_add(oc, "xen-version", "uint32", 6655 kvm_arch_get_xen_version, 6656 kvm_arch_set_xen_version, 6657 NULL, NULL); 6658 object_class_property_set_description(oc, "xen-version", 6659 "Xen version to be emulated " 6660 "(in XENVER_version form " 6661 "e.g. 0x4000a for 4.10)"); 6662 6663 object_class_property_add(oc, "xen-gnttab-max-frames", "uint16", 6664 kvm_arch_get_xen_gnttab_max_frames, 6665 kvm_arch_set_xen_gnttab_max_frames, 6666 NULL, NULL); 6667 object_class_property_set_description(oc, "xen-gnttab-max-frames", 6668 "Maximum number of grant table frames"); 6669 6670 object_class_property_add(oc, "xen-evtchn-max-pirq", "uint16", 6671 kvm_arch_get_xen_evtchn_max_pirq, 6672 kvm_arch_set_xen_evtchn_max_pirq, 6673 NULL, NULL); 6674 object_class_property_set_description(oc, "xen-evtchn-max-pirq", 6675 "Maximum number of Xen PIRQs"); 6676 } 6677 6678 void kvm_set_max_apic_id(uint32_t max_apic_id) 6679 { 6680 kvm_vm_enable_cap(kvm_state, KVM_CAP_MAX_VCPU_ID, 0, max_apic_id); 6681 } 6682