static void kvm_cpu_fill_host(x86_def_t *x86_cpu_def) { uint32_t eax = 0, ebx = 0, ecx = 0, edx = 0; assert(kvm_enabled()); x86_cpu_def->name = "host"; host_cpuid(0x0, 0, &eax, &ebx, &ecx, &edx); x86_cpu_def->level = eax; x86_cpu_def->vendor1 = ebx; x86_cpu_def->vendor2 = edx; x86_cpu_def->vendor3 = ecx; host_cpuid(0x1, 0, &eax, &ebx, &ecx, &edx); x86_cpu_def->family = ((eax >> 8) & 0x0F) + ((eax >> 20) & 0xFF); x86_cpu_def->model = ((eax >> 4) & 0x0F) | ((eax & 0xF0000) >> 12); x86_cpu_def->stepping = eax & 0x0F; x86_cpu_def->ext_features = ecx; x86_cpu_def->features = edx; if (x86_cpu_def->level >= 7) { x86_cpu_def->cpuid_7_0_ebx_features = kvm_arch_get_supported_cpuid(kvm_state, 0x7, 0, R_EBX); } else { x86_cpu_def->cpuid_7_0_ebx_features = 0; } host_cpuid(0x80000000, 0, &eax, &ebx, &ecx, &edx); x86_cpu_def->xlevel = eax; host_cpuid(0x80000001, 0, &eax, &ebx, &ecx, &edx); x86_cpu_def->ext2_features = edx; x86_cpu_def->ext3_features = ecx; cpu_x86_fill_model_id(x86_cpu_def->model_id); x86_cpu_def->vendor_override = 0; /* Call Centaur's CPUID instruction. */ if (x86_cpu_def->vendor1 == CPUID_VENDOR_VIA_1 && x86_cpu_def->vendor2 == CPUID_VENDOR_VIA_2 && x86_cpu_def->vendor3 == CPUID_VENDOR_VIA_3) { host_cpuid(0xC0000000, 0, &eax, &ebx, &ecx, &edx); if (eax >= 0xC0000001) { /* Support VIA max extended level */ x86_cpu_def->xlevel2 = eax; host_cpuid(0xC0000001, 0, &eax, &ebx, &ecx, &edx); x86_cpu_def->ext4_features = edx; } } /* * 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; }