void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count, uint32_t *eax, uint32_t *ebx, uint32_t *ecx, uint32_t *edx) { X86CPU *cpu = x86_env_get_cpu(env); CPUState *cs = CPU(cpu); uint32_t pkg_offset; /* test if maximum index reached */ if (index & 0x80000000) { if (index > env->cpuid_xlevel) { if (env->cpuid_xlevel2 > 0) { /* Handle the Centaur's CPUID instruction. */ if (index > env->cpuid_xlevel2) { index = env->cpuid_xlevel2; } else if (index < 0xC0000000) { index = env->cpuid_xlevel; } } else { /* Intel documentation states that invalid EAX input will * return the same information as EAX=cpuid_level * (Intel SDM Vol. 2A - Instruction Set Reference - CPUID) */ index = env->cpuid_level; } } } else { if (index > env->cpuid_level) index = env->cpuid_level; } switch(index) { case 0: *eax = env->cpuid_level; *ebx = env->cpuid_vendor1; *edx = env->cpuid_vendor2; *ecx = env->cpuid_vendor3; break; case 1: *eax = env->cpuid_version; *ebx = (cpu->apic_id << 24) | 8 << 8; /* CLFLUSH size in quad words, Linux wants it. */ *ecx = env->features[FEAT_1_ECX]; if ((*ecx & CPUID_EXT_XSAVE) && (env->cr[4] & CR4_OSXSAVE_MASK)) { *ecx |= CPUID_EXT_OSXSAVE; } *edx = env->features[FEAT_1_EDX]; if (cs->nr_cores * cs->nr_threads > 1) { *ebx |= (cs->nr_cores * cs->nr_threads) << 16; *edx |= CPUID_HT; } break; case 2: /* cache info: needed for Pentium Pro compatibility */ if (cpu->cache_info_passthrough) { host_cpuid(index, 0, eax, ebx, ecx, edx); break; } *eax = 1; /* Number of CPUID[EAX=2] calls required */ *ebx = 0; if (!cpu->enable_l3_cache) { *ecx = 0; } else { *ecx = L3_N_DESCRIPTOR; } *edx = (L1D_DESCRIPTOR << 16) | \ (L1I_DESCRIPTOR << 8) | \ (L2_DESCRIPTOR); break; case 4: /* cache info: needed for Core compatibility */ if (cpu->cache_info_passthrough) { host_cpuid(index, count, eax, ebx, ecx, edx); *eax &= ~0xFC000000; } else { *eax = 0; switch (count) { case 0: /* L1 dcache info */ *eax |= CPUID_4_TYPE_DCACHE | \ CPUID_4_LEVEL(1) | \ CPUID_4_SELF_INIT_LEVEL; *ebx = (L1D_LINE_SIZE - 1) | \ ((L1D_PARTITIONS - 1) << 12) | \ ((L1D_ASSOCIATIVITY - 1) << 22); *ecx = L1D_SETS - 1; *edx = CPUID_4_NO_INVD_SHARING; break; case 1: /* L1 icache info */ *eax |= CPUID_4_TYPE_ICACHE | \ CPUID_4_LEVEL(1) | \ CPUID_4_SELF_INIT_LEVEL; *ebx = (L1I_LINE_SIZE - 1) | \ ((L1I_PARTITIONS - 1) << 12) | \ ((L1I_ASSOCIATIVITY - 1) << 22); *ecx = L1I_SETS - 1; *edx = CPUID_4_NO_INVD_SHARING; break; case 2: /* L2 cache info */ *eax |= CPUID_4_TYPE_UNIFIED | \ CPUID_4_LEVEL(2) | \ CPUID_4_SELF_INIT_LEVEL; if (cs->nr_threads > 1) { *eax |= (cs->nr_threads - 1) << 14; } *ebx = (L2_LINE_SIZE - 1) | \ ((L2_PARTITIONS - 1) << 12) | \ ((L2_ASSOCIATIVITY - 1) << 22); *ecx = L2_SETS - 1; *edx = CPUID_4_NO_INVD_SHARING; break; case 3: /* L3 cache info */ if (!cpu->enable_l3_cache) { *eax = 0; *ebx = 0; *ecx = 0; *edx = 0; break; } *eax |= CPUID_4_TYPE_UNIFIED | \ CPUID_4_LEVEL(3) | \ CPUID_4_SELF_INIT_LEVEL; pkg_offset = apicid_pkg_offset(cs->nr_cores, cs->nr_threads); *eax |= ((1 << pkg_offset) - 1) << 14; *ebx = (L3_N_LINE_SIZE - 1) | \ ((L3_N_PARTITIONS - 1) << 12) | \ ((L3_N_ASSOCIATIVITY - 1) << 22); *ecx = L3_N_SETS - 1; *edx = CPUID_4_INCLUSIVE | CPUID_4_COMPLEX_IDX; break; default: /* end of info */ *eax = 0; *ebx = 0; *ecx = 0; *edx = 0; break; } } /* QEMU gives out its own APIC IDs, never pass down bits 31..26. */ if ((*eax & 31) && cs->nr_cores > 1) { *eax |= (cs->nr_cores - 1) << 26; } break; case 5: /* mwait info: needed for Core compatibility */ *eax = 0; /* Smallest monitor-line size in bytes */ *ebx = 0; /* Largest monitor-line size in bytes */ *ecx = CPUID_MWAIT_EMX | CPUID_MWAIT_IBE; *edx = 0; break; case 6: /* Thermal and Power Leaf */ *eax = env->features[FEAT_6_EAX]; *ebx = 0; *ecx = 0; *edx = 0; break; case 7: /* Structured Extended Feature Flags Enumeration Leaf */ if (count == 0) { *eax = 0; /* Maximum ECX value for sub-leaves */ *ebx = env->features[FEAT_7_0_EBX]; /* Feature flags */ *ecx = env->features[FEAT_7_0_ECX]; /* Feature flags */ if ((*ecx & CPUID_7_0_ECX_PKU) && env->cr[4] & CR4_PKE_MASK) { *ecx |= CPUID_7_0_ECX_OSPKE; } *edx = 0; /* Reserved */ } else { *eax = 0; *ebx = 0; *ecx = 0; *edx = 0; } break; case 9: /* Direct Cache Access Information Leaf */ *eax = 0; /* Bits 0-31 in DCA_CAP MSR */ *ebx = 0; *ecx = 0; *edx = 0; break; case 0xA: /* Architectural Performance Monitoring Leaf */ if (kvm_enabled() && cpu->enable_pmu) { KVMState *s = cs->kvm_state; *eax = kvm_arch_get_supported_cpuid(s, 0xA, count, R_EAX); *ebx = kvm_arch_get_supported_cpuid(s, 0xA, count, R_EBX); *ecx = kvm_arch_get_supported_cpuid(s, 0xA, count, R_ECX); *edx = kvm_arch_get_supported_cpuid(s, 0xA, count, R_EDX); } else { *eax = 0; *ebx = 0; *ecx = 0; *edx = 0; } break; case 0xB: /* Extended Topology Enumeration Leaf */ if (!cpu->enable_cpuid_0xb) { *eax = *ebx = *ecx = *edx = 0; break; } *ecx = count & 0xff; *edx = cpu->apic_id; switch (count) { case 0: *eax = apicid_core_offset(cs->nr_cores, cs->nr_threads); *ebx = cs->nr_threads; *ecx |= CPUID_TOPOLOGY_LEVEL_SMT; break; case 1: *eax = apicid_pkg_offset(cs->nr_cores, cs->nr_threads); *ebx = cs->nr_cores * cs->nr_threads; *ecx |= CPUID_TOPOLOGY_LEVEL_CORE; break; default: *eax = 0; *ebx = 0; *ecx |= CPUID_TOPOLOGY_LEVEL_INVALID; } assert(!(*eax & ~0x1f)); *ebx &= 0xffff; /* The count doesn't need to be reliable. */ break; case 0xD: { KVMState *s = cs->kvm_state; uint64_t ena_mask; int i; /* Processor Extended State */ *eax = 0; *ebx = 0; *ecx = 0; *edx = 0; if (!(env->features[FEAT_1_ECX] & CPUID_EXT_XSAVE)) { break; } if (kvm_enabled()) { ena_mask = kvm_arch_get_supported_cpuid(s, 0xd, 0, R_EDX); ena_mask <<= 32; ena_mask |= kvm_arch_get_supported_cpuid(s, 0xd, 0, R_EAX); } else { ena_mask = -1; } if (count == 0) { *ecx = 0x240; for (i = 2; i < ARRAY_SIZE(x86_ext_save_areas); i++) { const ExtSaveArea *esa = &x86_ext_save_areas[i]; if ((env->features[esa->feature] & esa->bits) == esa->bits && ((ena_mask >> i) & 1) != 0) { if (i < 32) { *eax |= 1u << i; } else { *edx |= 1u << (i - 32); } *ecx = MAX(*ecx, esa->offset + esa->size); } } *eax |= ena_mask & (XSTATE_FP_MASK | XSTATE_SSE_MASK); *ebx = *ecx; } else if (count == 1) { *eax = env->features[FEAT_XSAVE]; } else if (count < ARRAY_SIZE(x86_ext_save_areas)) { const ExtSaveArea *esa = &x86_ext_save_areas[count]; if ((env->features[esa->feature] & esa->bits) == esa->bits && ((ena_mask >> count) & 1) != 0) { *eax = esa->size; *ebx = esa->offset; } } break; } case 0x80000000: *eax = env->cpuid_xlevel; *ebx = env->cpuid_vendor1; *edx = env->cpuid_vendor2; *ecx = env->cpuid_vendor3; break; case 0x80000001: *eax = env->cpuid_version; *ebx = 0; *ecx = env->features[FEAT_8000_0001_ECX]; *edx = env->features[FEAT_8000_0001_EDX]; /* The Linux kernel checks for the CMPLegacy bit and * discards multiple thread information if it is set. * So don't set it here for Intel to make Linux guests happy. */ if (cs->nr_cores * cs->nr_threads > 1) { if (env->cpuid_vendor1 != CPUID_VENDOR_INTEL_1 || env->cpuid_vendor2 != CPUID_VENDOR_INTEL_2 || env->cpuid_vendor3 != CPUID_VENDOR_INTEL_3) { *ecx |= 1 << 1; /* CmpLegacy bit */ } } break; case 0x80000002: case 0x80000003: case 0x80000004: *eax = env->cpuid_model[(index - 0x80000002) * 4 + 0]; *ebx = env->cpuid_model[(index - 0x80000002) * 4 + 1]; *ecx = env->cpuid_model[(index - 0x80000002) * 4 + 2]; *edx = env->cpuid_model[(index - 0x80000002) * 4 + 3]; break; case 0x80000005: /* cache info (L1 cache) */ if (cpu->cache_info_passthrough) { host_cpuid(index, 0, eax, ebx, ecx, edx); break; } *eax = (L1_DTLB_2M_ASSOC << 24) | (L1_DTLB_2M_ENTRIES << 16) | \ (L1_ITLB_2M_ASSOC << 8) | (L1_ITLB_2M_ENTRIES); *ebx = (L1_DTLB_4K_ASSOC << 24) | (L1_DTLB_4K_ENTRIES << 16) | \ (L1_ITLB_4K_ASSOC << 8) | (L1_ITLB_4K_ENTRIES); *ecx = (L1D_SIZE_KB_AMD << 24) | (L1D_ASSOCIATIVITY_AMD << 16) | \ (L1D_LINES_PER_TAG << 8) | (L1D_LINE_SIZE); *edx = (L1I_SIZE_KB_AMD << 24) | (L1I_ASSOCIATIVITY_AMD << 16) | \ (L1I_LINES_PER_TAG << 8) | (L1I_LINE_SIZE); break; case 0x80000006: /* cache info (L2 cache) */ if (cpu->cache_info_passthrough) { host_cpuid(index, 0, eax, ebx, ecx, edx); break; } *eax = (AMD_ENC_ASSOC(L2_DTLB_2M_ASSOC) << 28) | \ (L2_DTLB_2M_ENTRIES << 16) | \ (AMD_ENC_ASSOC(L2_ITLB_2M_ASSOC) << 12) | \ (L2_ITLB_2M_ENTRIES); *ebx = (AMD_ENC_ASSOC(L2_DTLB_4K_ASSOC) << 28) | \ (L2_DTLB_4K_ENTRIES << 16) | \ (AMD_ENC_ASSOC(L2_ITLB_4K_ASSOC) << 12) | \ (L2_ITLB_4K_ENTRIES); *ecx = (L2_SIZE_KB_AMD << 16) | \ (AMD_ENC_ASSOC(L2_ASSOCIATIVITY) << 12) | \ (L2_LINES_PER_TAG << 8) | (L2_LINE_SIZE); if (!cpu->enable_l3_cache) { *edx = ((L3_SIZE_KB / 512) << 18) | \ (AMD_ENC_ASSOC(L3_ASSOCIATIVITY) << 12) | \ (L3_LINES_PER_TAG << 8) | (L3_LINE_SIZE); } else { *edx = ((L3_N_SIZE_KB_AMD / 512) << 18) | \ (AMD_ENC_ASSOC(L3_N_ASSOCIATIVITY) << 12) | \ (L3_N_LINES_PER_TAG << 8) | (L3_N_LINE_SIZE); } break; case 0x80000007: *eax = 0; *ebx = 0; *ecx = 0; *edx = env->features[FEAT_8000_0007_EDX]; break; case 0x80000008: /* virtual & phys address size in low 2 bytes. */ if (env->features[FEAT_8000_0001_EDX] & CPUID_EXT2_LM) { /* 64 bit processor, 48 bits virtual, configurable * physical bits. */ *eax = 0x00003000 + cpu->phys_bits; } else { *eax = cpu->phys_bits; } *ebx = 0; *ecx = 0; *edx = 0; if (cs->nr_cores * cs->nr_threads > 1) { *ecx |= (cs->nr_cores * cs->nr_threads) - 1; } break; case 0x8000000A: if (env->features[FEAT_8000_0001_ECX] & CPUID_EXT3_SVM) { *eax = 0x00000001; /* SVM Revision */ *ebx = 0x00000010; /* nr of ASIDs */ *ecx = 0; *edx = env->features[FEAT_SVM]; /* optional features */ } else { *eax = 0; *ebx = 0; *ecx = 0; *edx = 0; } break; case 0xC0000000: *eax = env->cpuid_xlevel2; *ebx = 0; *ecx = 0; *edx = 0; break; case 0xC0000001: /* Support for VIA CPU's CPUID instruction */ *eax = env->cpuid_version; *ebx = 0; *ecx = 0; *edx = env->features[FEAT_C000_0001_EDX]; break; case 0xC0000002: case 0xC0000003: case 0xC0000004: /* Reserved for the future, and now filled with zero */ *eax = 0; *ebx = 0; *ecx = 0; *edx = 0; break; default: /* reserved values: zero */ *eax = 0; *ebx = 0; *ecx = 0; *edx = 0; break; } }