diff options
Diffstat (limited to 'target-i386/cpu.c')
| -rw-r--r-- | target-i386/cpu.c | 153 |
1 files changed, 99 insertions, 54 deletions
diff --git a/target-i386/cpu.c b/target-i386/cpu.c index 82685dc3f5..78bd61e18f 100644 --- a/target-i386/cpu.c +++ b/target-i386/cpu.c @@ -124,15 +124,34 @@ static const char *cpuid_7_0_ebx_feature_name[] = { NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, }; +const char *get_register_name_32(unsigned int reg) +{ + static const char *reg_names[CPU_NB_REGS32] = { + [R_EAX] = "EAX", + [R_ECX] = "ECX", + [R_EDX] = "EDX", + [R_EBX] = "EBX", + [R_ESP] = "ESP", + [R_EBP] = "EBP", + [R_ESI] = "ESI", + [R_EDI] = "EDI", + }; + + if (reg > CPU_NB_REGS32) { + return NULL; + } + return reg_names[reg]; +} + /* collects per-function cpuid data */ typedef struct model_features_t { uint32_t *guest_feat; uint32_t *host_feat; - uint32_t check_feat; const char **flag_names; uint32_t cpuid; - } model_features_t; + int reg; +} model_features_t; int check_cpuid = 0; int enforce_cpuid = 0; @@ -388,6 +407,9 @@ static x86_def_t builtin_x86_defs[] = { { .name = "core2duo", .level = 10, + .vendor1 = CPUID_VENDOR_INTEL_1, + .vendor2 = CPUID_VENDOR_INTEL_2, + .vendor3 = CPUID_VENDOR_INTEL_3, .family = 6, .model = 15, .stepping = 11, @@ -432,6 +454,9 @@ static x86_def_t builtin_x86_defs[] = { { .name = "qemu32", .level = 4, + .vendor1 = CPUID_VENDOR_INTEL_1, + .vendor2 = CPUID_VENDOR_INTEL_2, + .vendor3 = CPUID_VENDOR_INTEL_3, .family = 6, .model = 3, .stepping = 3, @@ -442,6 +467,9 @@ static x86_def_t builtin_x86_defs[] = { { .name = "kvm32", .level = 5, + .vendor1 = CPUID_VENDOR_INTEL_1, + .vendor2 = CPUID_VENDOR_INTEL_2, + .vendor3 = CPUID_VENDOR_INTEL_3, .family = 15, .model = 6, .stepping = 1, @@ -456,6 +484,9 @@ static x86_def_t builtin_x86_defs[] = { { .name = "coreduo", .level = 10, + .vendor1 = CPUID_VENDOR_INTEL_1, + .vendor2 = CPUID_VENDOR_INTEL_2, + .vendor3 = CPUID_VENDOR_INTEL_3, .family = 6, .model = 14, .stepping = 8, @@ -471,6 +502,9 @@ static x86_def_t builtin_x86_defs[] = { { .name = "486", .level = 1, + .vendor1 = CPUID_VENDOR_INTEL_1, + .vendor2 = CPUID_VENDOR_INTEL_2, + .vendor3 = CPUID_VENDOR_INTEL_3, .family = 4, .model = 0, .stepping = 0, @@ -480,6 +514,9 @@ static x86_def_t builtin_x86_defs[] = { { .name = "pentium", .level = 1, + .vendor1 = CPUID_VENDOR_INTEL_1, + .vendor2 = CPUID_VENDOR_INTEL_2, + .vendor3 = CPUID_VENDOR_INTEL_3, .family = 5, .model = 4, .stepping = 3, @@ -489,6 +526,9 @@ static x86_def_t builtin_x86_defs[] = { { .name = "pentium2", .level = 2, + .vendor1 = CPUID_VENDOR_INTEL_1, + .vendor2 = CPUID_VENDOR_INTEL_2, + .vendor3 = CPUID_VENDOR_INTEL_3, .family = 6, .model = 5, .stepping = 2, @@ -498,6 +538,9 @@ static x86_def_t builtin_x86_defs[] = { { .name = "pentium3", .level = 2, + .vendor1 = CPUID_VENDOR_INTEL_1, + .vendor2 = CPUID_VENDOR_INTEL_2, + .vendor3 = CPUID_VENDOR_INTEL_3, .family = 6, .model = 7, .stepping = 3, @@ -523,6 +566,9 @@ static x86_def_t builtin_x86_defs[] = { .name = "n270", /* original is on level 10 */ .level = 5, + .vendor1 = CPUID_VENDOR_INTEL_1, + .vendor2 = CPUID_VENDOR_INTEL_2, + .vendor3 = CPUID_VENDOR_INTEL_3, .family = 6, .model = 28, .stepping = 2, @@ -897,13 +943,12 @@ static void kvm_cpu_fill_host(x86_def_t *x86_cpu_def) } } - /* - * Every SVM feature requires emulation support in KVM - so we can't just - * read the host features here. KVM might even support SVM features not - * available on the host hardware. Just set all bits and mask out the - * unsupported ones later. - */ - x86_cpu_def->svm_features = -1; + /* Other KVM-specific feature fields: */ + x86_cpu_def->svm_features = + kvm_arch_get_supported_cpuid(s, 0x8000000A, 0, R_EDX); + x86_cpu_def->kvm_features = + kvm_arch_get_supported_cpuid(s, KVM_CPUID_FEATURES, 0, R_EAX); + #endif /* CONFIG_KVM */ } @@ -913,18 +958,20 @@ static int unavailable_host_feature(struct model_features_t *f, uint32_t mask) for (i = 0; i < 32; ++i) if (1 << i & mask) { - fprintf(stderr, "warning: host cpuid %04x_%04x lacks requested" - " flag '%s' [0x%08x]\n", - f->cpuid >> 16, f->cpuid & 0xffff, - f->flag_names[i] ? f->flag_names[i] : "[reserved]", mask); + const char *reg = get_register_name_32(f->reg); + assert(reg); + fprintf(stderr, "warning: host doesn't support requested feature: " + "CPUID.%02XH:%s%s%s [bit %d]\n", + f->cpuid, reg, + f->flag_names[i] ? "." : "", + f->flag_names[i] ? f->flag_names[i] : "", i); break; } return 0; } /* best effort attempt to inform user requested cpu flags aren't making - * their way to the guest. Note: ft[].check_feat ideally should be - * specified via a guest_def field to suppress report of extraneous flags. + * their way to the guest. * * This function may be called only if KVM is enabled. */ @@ -935,20 +982,21 @@ static int kvm_check_features_against_host(x86_def_t *guest_def) int rv, i; struct model_features_t ft[] = { {&guest_def->features, &host_def.features, - ~0, feature_name, 0x00000000}, + feature_name, 0x00000001, R_EDX}, {&guest_def->ext_features, &host_def.ext_features, - ~CPUID_EXT_HYPERVISOR, ext_feature_name, 0x00000001}, + ext_feature_name, 0x00000001, R_ECX}, {&guest_def->ext2_features, &host_def.ext2_features, - ~PPRO_FEATURES, ext2_feature_name, 0x80000000}, + ext2_feature_name, 0x80000001, R_EDX}, {&guest_def->ext3_features, &host_def.ext3_features, - ~CPUID_EXT3_SVM, ext3_feature_name, 0x80000001}}; + ext3_feature_name, 0x80000001, R_ECX} + }; assert(kvm_enabled()); kvm_cpu_fill_host(&host_def); for (rv = 0, i = 0; i < ARRAY_SIZE(ft); ++i) for (mask = 1; mask; mask <<= 1) - if (ft[i].check_feat & mask && *ft[i].guest_feat & mask && + if (*ft[i].guest_feat & mask && !(*ft[i].host_feat & mask)) { unavailable_host_feature(&ft[i], mask); rv = 1; @@ -1513,15 +1561,10 @@ int cpu_x86_register(X86CPU *cpu, const char *cpu_model) if (cpu_x86_parse_featurestr(def, features) < 0) { goto error; } - if (def->vendor1) { - env->cpuid_vendor1 = def->vendor1; - env->cpuid_vendor2 = def->vendor2; - env->cpuid_vendor3 = def->vendor3; - } else { - env->cpuid_vendor1 = CPUID_VENDOR_INTEL_1; - env->cpuid_vendor2 = CPUID_VENDOR_INTEL_2; - env->cpuid_vendor3 = CPUID_VENDOR_INTEL_3; - } + assert(def->vendor1); + env->cpuid_vendor1 = def->vendor1; + env->cpuid_vendor2 = def->vendor2; + env->cpuid_vendor3 = def->vendor3; env->cpuid_vendor_override = def->vendor_override; object_property_set_int(OBJECT(cpu), def->level, "level", &error); object_property_set_int(OBJECT(cpu), def->family, "family", &error); @@ -1540,31 +1583,6 @@ int cpu_x86_register(X86CPU *cpu, const char *cpu_model) object_property_set_int(OBJECT(cpu), (int64_t)def->tsc_khz * 1000, "tsc-frequency", &error); - /* On AMD CPUs, some CPUID[8000_0001].EDX bits must match the bits on - * CPUID[1].EDX. - */ - if (env->cpuid_vendor1 == CPUID_VENDOR_AMD_1 && - env->cpuid_vendor2 == CPUID_VENDOR_AMD_2 && - env->cpuid_vendor3 == CPUID_VENDOR_AMD_3) { - env->cpuid_ext2_features &= ~CPUID_EXT2_AMD_ALIASES; - env->cpuid_ext2_features |= (def->features & CPUID_EXT2_AMD_ALIASES); - } - - if (!kvm_enabled()) { - env->cpuid_features &= TCG_FEATURES; - env->cpuid_ext_features &= TCG_EXT_FEATURES; - env->cpuid_ext2_features &= (TCG_EXT2_FEATURES -#ifdef TARGET_X86_64 - | CPUID_EXT2_SYSCALL | CPUID_EXT2_LM -#endif - ); - env->cpuid_ext3_features &= TCG_EXT3_FEATURES; - env->cpuid_svm_features &= TCG_SVM_FEATURES; - } else { -#ifdef CONFIG_KVM - filter_features_for_kvm(cpu); -#endif - } object_property_set_str(OBJECT(cpu), def->model_id, "model-id", &error); if (error) { fprintf(stderr, "%s\n", error_get_pretty(error)); @@ -2085,6 +2103,33 @@ void x86_cpu_realize(Object *obj, Error **errp) env->cpuid_level = 7; } + /* On AMD CPUs, some CPUID[8000_0001].EDX bits must match the bits on + * CPUID[1].EDX. + */ + if (env->cpuid_vendor1 == CPUID_VENDOR_AMD_1 && + env->cpuid_vendor2 == CPUID_VENDOR_AMD_2 && + env->cpuid_vendor3 == CPUID_VENDOR_AMD_3) { + env->cpuid_ext2_features &= ~CPUID_EXT2_AMD_ALIASES; + env->cpuid_ext2_features |= (env->cpuid_features + & CPUID_EXT2_AMD_ALIASES); + } + + if (!kvm_enabled()) { + env->cpuid_features &= TCG_FEATURES; + env->cpuid_ext_features &= TCG_EXT_FEATURES; + env->cpuid_ext2_features &= (TCG_EXT2_FEATURES +#ifdef TARGET_X86_64 + | CPUID_EXT2_SYSCALL | CPUID_EXT2_LM +#endif + ); + env->cpuid_ext3_features &= TCG_EXT3_FEATURES; + env->cpuid_svm_features &= TCG_SVM_FEATURES; + } else { +#ifdef CONFIG_KVM + filter_features_for_kvm(cpu); +#endif + } + #ifndef CONFIG_USER_ONLY qemu_register_reset(x86_cpu_machine_reset_cb, cpu); |