diff options
Diffstat (limited to 'target-i386/cpu.c')
| -rw-r--r-- | target-i386/cpu.c | 27 |
1 files changed, 12 insertions, 15 deletions
diff --git a/target-i386/cpu.c b/target-i386/cpu.c index 043a21dcd7..b11fe30f37 100644 --- a/target-i386/cpu.c +++ b/target-i386/cpu.c @@ -359,7 +359,6 @@ typedef struct x86_def_t { uint32_t kvm_features, svm_features; uint32_t xlevel; char model_id[48]; - int vendor_override; /* Store the results of Centaur's CPUID instructions */ uint32_t ext4_features; uint32_t xlevel2; @@ -927,7 +926,6 @@ static void kvm_cpu_fill_host(x86_def_t *x86_cpu_def) kvm_arch_get_supported_cpuid(s, 0x80000001, 0, R_ECX); cpu_x86_fill_model_id(x86_cpu_def->model_id); - x86_cpu_def->vendor_override = 0; /* Call Centaur's CPUID instruction. */ if (!strcmp(x86_cpu_def->vendor, CPUID_VENDOR_VIA)) { @@ -1194,7 +1192,6 @@ static void x86_cpuid_set_vendor(Object *obj, const char *value, env->cpuid_vendor2 |= ((uint8_t)value[i + 4]) << (8 * i); env->cpuid_vendor3 |= ((uint8_t)value[i + 8]) << (8 * i); } - env->cpuid_vendor_override = 1; } static char *x86_cpuid_get_model_id(Object *obj, Error **errp) @@ -1282,6 +1279,18 @@ static int cpu_x86_find_by_name(x86_def_t *x86_cpu_def, const char *name) def = &builtin_x86_defs[i]; if (strcmp(name, def->name) == 0) { memcpy(x86_cpu_def, def, sizeof(*def)); + /* sysenter isn't supported in compatibility mode on AMD, + * syscall isn't supported in compatibility mode on Intel. + * Normally we advertise the actual CPU vendor, but you can + * override this using the 'vendor' property if you want to use + * KVM's sysenter/syscall emulation in compatibility mode and + * when doing cross vendor migration + */ + if (kvm_enabled()) { + uint32_t ebx = 0, ecx = 0, edx = 0; + host_cpuid(0, 0, NULL, &ebx, &ecx, &edx); + x86_cpu_vendor_words2str(x86_cpu_def->vendor, ebx, edx, ecx); + } return 0; } } @@ -1357,7 +1366,6 @@ static int cpu_x86_parse_featurestr(x86_def_t *x86_cpu_def, char *features) x86_cpu_def->xlevel = numvalue; } else if (!strcmp(featurestr, "vendor")) { pstrcpy(x86_cpu_def->vendor, sizeof(x86_cpu_def->vendor), val); - x86_cpu_def->vendor_override = 1; } else if (!strcmp(featurestr, "model_id")) { pstrcpy(x86_cpu_def->model_id, sizeof(x86_cpu_def->model_id), val); @@ -1558,7 +1566,6 @@ int cpu_x86_register(X86CPU *cpu, const char *cpu_model) goto out; } object_property_set_str(OBJECT(cpu), def->vendor, "vendor", &error); - 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); object_property_set_int(OBJECT(cpu), def->model, "model", &error); @@ -1627,16 +1634,6 @@ static void get_cpuid_vendor(CPUX86State *env, uint32_t *ebx, *ebx = env->cpuid_vendor1; *edx = env->cpuid_vendor2; *ecx = env->cpuid_vendor3; - - /* sysenter isn't supported on compatibility mode on AMD, syscall - * isn't supported in compatibility mode on Intel. - * Normally we advertise the actual cpu vendor, but you can override - * this if you want to use KVM's sysenter/syscall emulation - * in compatibility mode and when doing cross vendor migration - */ - if (kvm_enabled() && ! env->cpuid_vendor_override) { - host_cpuid(0, 0, NULL, ebx, ecx, edx); - } } void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count, |