1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_X86_CPUFEATURES_H 3 #define _ASM_X86_CPUFEATURES_H 4 5 #ifndef _ASM_X86_REQUIRED_FEATURES_H 6 #include <asm/required-features.h> 7 #endif 8 9 #ifndef _ASM_X86_DISABLED_FEATURES_H 10 #include <asm/disabled-features.h> 11 #endif 12 13 /* 14 * Defines x86 CPU feature bits 15 */ 16 #define NCAPINTS 22 /* N 32-bit words worth of info */ 17 #define NBUGINTS 2 /* N 32-bit bug flags */ 18 19 /* 20 * Note: If the comment begins with a quoted string, that string is used 21 * in /proc/cpuinfo instead of the macro name. If the string is "", 22 * this feature bit is not displayed in /proc/cpuinfo at all. 23 * 24 * When adding new features here that depend on other features, 25 * please update the table in kernel/cpu/cpuid-deps.c as well. 26 */ 27 28 /* Intel-defined CPU features, CPUID level 0x00000001 (EDX), word 0 */ 29 #define X86_FEATURE_FPU ( 0*32+ 0) /* Onboard FPU */ 30 #define X86_FEATURE_VME ( 0*32+ 1) /* Virtual Mode Extensions */ 31 #define X86_FEATURE_DE ( 0*32+ 2) /* Debugging Extensions */ 32 #define X86_FEATURE_PSE ( 0*32+ 3) /* Page Size Extensions */ 33 #define X86_FEATURE_TSC ( 0*32+ 4) /* Time Stamp Counter */ 34 #define X86_FEATURE_MSR ( 0*32+ 5) /* Model-Specific Registers */ 35 #define X86_FEATURE_PAE ( 0*32+ 6) /* Physical Address Extensions */ 36 #define X86_FEATURE_MCE ( 0*32+ 7) /* Machine Check Exception */ 37 #define X86_FEATURE_CX8 ( 0*32+ 8) /* CMPXCHG8 instruction */ 38 #define X86_FEATURE_APIC ( 0*32+ 9) /* Onboard APIC */ 39 #define X86_FEATURE_SEP ( 0*32+11) /* SYSENTER/SYSEXIT */ 40 #define X86_FEATURE_MTRR ( 0*32+12) /* Memory Type Range Registers */ 41 #define X86_FEATURE_PGE ( 0*32+13) /* Page Global Enable */ 42 #define X86_FEATURE_MCA ( 0*32+14) /* Machine Check Architecture */ 43 #define X86_FEATURE_CMOV ( 0*32+15) /* CMOV instructions (plus FCMOVcc, FCOMI with FPU) */ 44 #define X86_FEATURE_PAT ( 0*32+16) /* Page Attribute Table */ 45 #define X86_FEATURE_PSE36 ( 0*32+17) /* 36-bit PSEs */ 46 #define X86_FEATURE_PN ( 0*32+18) /* Processor serial number */ 47 #define X86_FEATURE_CLFLUSH ( 0*32+19) /* CLFLUSH instruction */ 48 #define X86_FEATURE_DS ( 0*32+21) /* "dts" Debug Store */ 49 #define X86_FEATURE_ACPI ( 0*32+22) /* ACPI via MSR */ 50 #define X86_FEATURE_MMX ( 0*32+23) /* Multimedia Extensions */ 51 #define X86_FEATURE_FXSR ( 0*32+24) /* FXSAVE/FXRSTOR, CR4.OSFXSR */ 52 #define X86_FEATURE_XMM ( 0*32+25) /* "sse" */ 53 #define X86_FEATURE_XMM2 ( 0*32+26) /* "sse2" */ 54 #define X86_FEATURE_SELFSNOOP ( 0*32+27) /* "ss" CPU self snoop */ 55 #define X86_FEATURE_HT ( 0*32+28) /* Hyper-Threading */ 56 #define X86_FEATURE_ACC ( 0*32+29) /* "tm" Automatic clock control */ 57 #define X86_FEATURE_IA64 ( 0*32+30) /* IA-64 processor */ 58 #define X86_FEATURE_PBE ( 0*32+31) /* Pending Break Enable */ 59 60 /* AMD-defined CPU features, CPUID level 0x80000001, word 1 */ 61 /* Don't duplicate feature flags which are redundant with Intel! */ 62 #define X86_FEATURE_SYSCALL ( 1*32+11) /* SYSCALL/SYSRET */ 63 #define X86_FEATURE_MP ( 1*32+19) /* MP Capable */ 64 #define X86_FEATURE_NX ( 1*32+20) /* Execute Disable */ 65 #define X86_FEATURE_MMXEXT ( 1*32+22) /* AMD MMX extensions */ 66 #define X86_FEATURE_FXSR_OPT ( 1*32+25) /* FXSAVE/FXRSTOR optimizations */ 67 #define X86_FEATURE_GBPAGES ( 1*32+26) /* "pdpe1gb" GB pages */ 68 #define X86_FEATURE_RDTSCP ( 1*32+27) /* RDTSCP */ 69 #define X86_FEATURE_LM ( 1*32+29) /* Long Mode (x86-64, 64-bit support) */ 70 #define X86_FEATURE_3DNOWEXT ( 1*32+30) /* AMD 3DNow extensions */ 71 #define X86_FEATURE_3DNOW ( 1*32+31) /* 3DNow */ 72 73 /* Transmeta-defined CPU features, CPUID level 0x80860001, word 2 */ 74 #define X86_FEATURE_RECOVERY ( 2*32+ 0) /* CPU in recovery mode */ 75 #define X86_FEATURE_LONGRUN ( 2*32+ 1) /* Longrun power control */ 76 #define X86_FEATURE_LRTI ( 2*32+ 3) /* LongRun table interface */ 77 78 /* Other features, Linux-defined mapping, word 3 */ 79 /* This range is used for feature bits which conflict or are synthesized */ 80 #define X86_FEATURE_CXMMX ( 3*32+ 0) /* Cyrix MMX extensions */ 81 #define X86_FEATURE_K6_MTRR ( 3*32+ 1) /* AMD K6 nonstandard MTRRs */ 82 #define X86_FEATURE_CYRIX_ARR ( 3*32+ 2) /* Cyrix ARRs (= MTRRs) */ 83 #define X86_FEATURE_CENTAUR_MCR ( 3*32+ 3) /* Centaur MCRs (= MTRRs) */ 84 85 /* CPU types for specific tunings: */ 86 #define X86_FEATURE_K8 ( 3*32+ 4) /* "" Opteron, Athlon64 */ 87 /* FREE, was #define X86_FEATURE_K7 ( 3*32+ 5) "" Athlon */ 88 #define X86_FEATURE_P3 ( 3*32+ 6) /* "" P3 */ 89 #define X86_FEATURE_P4 ( 3*32+ 7) /* "" P4 */ 90 #define X86_FEATURE_CONSTANT_TSC ( 3*32+ 8) /* TSC ticks at a constant rate */ 91 #define X86_FEATURE_UP ( 3*32+ 9) /* SMP kernel running on UP */ 92 #define X86_FEATURE_ART ( 3*32+10) /* Always running timer (ART) */ 93 #define X86_FEATURE_ARCH_PERFMON ( 3*32+11) /* Intel Architectural PerfMon */ 94 #define X86_FEATURE_PEBS ( 3*32+12) /* Precise-Event Based Sampling */ 95 #define X86_FEATURE_BTS ( 3*32+13) /* Branch Trace Store */ 96 #define X86_FEATURE_SYSCALL32 ( 3*32+14) /* "" syscall in IA32 userspace */ 97 #define X86_FEATURE_SYSENTER32 ( 3*32+15) /* "" sysenter in IA32 userspace */ 98 #define X86_FEATURE_REP_GOOD ( 3*32+16) /* REP microcode works well */ 99 #define X86_FEATURE_AMD_LBR_V2 ( 3*32+17) /* AMD Last Branch Record Extension Version 2 */ 100 #define X86_FEATURE_CLEAR_CPU_BUF ( 3*32+18) /* "" Clear CPU buffers using VERW */ 101 #define X86_FEATURE_ACC_POWER ( 3*32+19) /* AMD Accumulated Power Mechanism */ 102 #define X86_FEATURE_NOPL ( 3*32+20) /* The NOPL (0F 1F) instructions */ 103 #define X86_FEATURE_ALWAYS ( 3*32+21) /* "" Always-present feature */ 104 #define X86_FEATURE_XTOPOLOGY ( 3*32+22) /* CPU topology enum extensions */ 105 #define X86_FEATURE_TSC_RELIABLE ( 3*32+23) /* TSC is known to be reliable */ 106 #define X86_FEATURE_NONSTOP_TSC ( 3*32+24) /* TSC does not stop in C states */ 107 #define X86_FEATURE_CPUID ( 3*32+25) /* CPU has CPUID instruction itself */ 108 #define X86_FEATURE_EXTD_APICID ( 3*32+26) /* Extended APICID (8 bits) */ 109 #define X86_FEATURE_AMD_DCM ( 3*32+27) /* AMD multi-node processor */ 110 #define X86_FEATURE_APERFMPERF ( 3*32+28) /* P-State hardware coordination feedback capability (APERF/MPERF MSRs) */ 111 #define X86_FEATURE_RAPL ( 3*32+29) /* AMD/Hygon RAPL interface */ 112 #define X86_FEATURE_NONSTOP_TSC_S3 ( 3*32+30) /* TSC doesn't stop in S3 state */ 113 #define X86_FEATURE_TSC_KNOWN_FREQ ( 3*32+31) /* TSC has known frequency */ 114 115 /* Intel-defined CPU features, CPUID level 0x00000001 (ECX), word 4 */ 116 #define X86_FEATURE_XMM3 ( 4*32+ 0) /* "pni" SSE-3 */ 117 #define X86_FEATURE_PCLMULQDQ ( 4*32+ 1) /* PCLMULQDQ instruction */ 118 #define X86_FEATURE_DTES64 ( 4*32+ 2) /* 64-bit Debug Store */ 119 #define X86_FEATURE_MWAIT ( 4*32+ 3) /* "monitor" MONITOR/MWAIT support */ 120 #define X86_FEATURE_DSCPL ( 4*32+ 4) /* "ds_cpl" CPL-qualified (filtered) Debug Store */ 121 #define X86_FEATURE_VMX ( 4*32+ 5) /* Hardware virtualization */ 122 #define X86_FEATURE_SMX ( 4*32+ 6) /* Safer Mode eXtensions */ 123 #define X86_FEATURE_EST ( 4*32+ 7) /* Enhanced SpeedStep */ 124 #define X86_FEATURE_TM2 ( 4*32+ 8) /* Thermal Monitor 2 */ 125 #define X86_FEATURE_SSSE3 ( 4*32+ 9) /* Supplemental SSE-3 */ 126 #define X86_FEATURE_CID ( 4*32+10) /* Context ID */ 127 #define X86_FEATURE_SDBG ( 4*32+11) /* Silicon Debug */ 128 #define X86_FEATURE_FMA ( 4*32+12) /* Fused multiply-add */ 129 #define X86_FEATURE_CX16 ( 4*32+13) /* CMPXCHG16B instruction */ 130 #define X86_FEATURE_XTPR ( 4*32+14) /* Send Task Priority Messages */ 131 #define X86_FEATURE_PDCM ( 4*32+15) /* Perf/Debug Capabilities MSR */ 132 #define X86_FEATURE_PCID ( 4*32+17) /* Process Context Identifiers */ 133 #define X86_FEATURE_DCA ( 4*32+18) /* Direct Cache Access */ 134 #define X86_FEATURE_XMM4_1 ( 4*32+19) /* "sse4_1" SSE-4.1 */ 135 #define X86_FEATURE_XMM4_2 ( 4*32+20) /* "sse4_2" SSE-4.2 */ 136 #define X86_FEATURE_X2APIC ( 4*32+21) /* X2APIC */ 137 #define X86_FEATURE_MOVBE ( 4*32+22) /* MOVBE instruction */ 138 #define X86_FEATURE_POPCNT ( 4*32+23) /* POPCNT instruction */ 139 #define X86_FEATURE_TSC_DEADLINE_TIMER ( 4*32+24) /* TSC deadline timer */ 140 #define X86_FEATURE_AES ( 4*32+25) /* AES instructions */ 141 #define X86_FEATURE_XSAVE ( 4*32+26) /* XSAVE/XRSTOR/XSETBV/XGETBV instructions */ 142 #define X86_FEATURE_OSXSAVE ( 4*32+27) /* "" XSAVE instruction enabled in the OS */ 143 #define X86_FEATURE_AVX ( 4*32+28) /* Advanced Vector Extensions */ 144 #define X86_FEATURE_F16C ( 4*32+29) /* 16-bit FP conversions */ 145 #define X86_FEATURE_RDRAND ( 4*32+30) /* RDRAND instruction */ 146 #define X86_FEATURE_HYPERVISOR ( 4*32+31) /* Running on a hypervisor */ 147 148 /* VIA/Cyrix/Centaur-defined CPU features, CPUID level 0xC0000001, word 5 */ 149 #define X86_FEATURE_XSTORE ( 5*32+ 2) /* "rng" RNG present (xstore) */ 150 #define X86_FEATURE_XSTORE_EN ( 5*32+ 3) /* "rng_en" RNG enabled */ 151 #define X86_FEATURE_XCRYPT ( 5*32+ 6) /* "ace" on-CPU crypto (xcrypt) */ 152 #define X86_FEATURE_XCRYPT_EN ( 5*32+ 7) /* "ace_en" on-CPU crypto enabled */ 153 #define X86_FEATURE_ACE2 ( 5*32+ 8) /* Advanced Cryptography Engine v2 */ 154 #define X86_FEATURE_ACE2_EN ( 5*32+ 9) /* ACE v2 enabled */ 155 #define X86_FEATURE_PHE ( 5*32+10) /* PadLock Hash Engine */ 156 #define X86_FEATURE_PHE_EN ( 5*32+11) /* PHE enabled */ 157 #define X86_FEATURE_PMM ( 5*32+12) /* PadLock Montgomery Multiplier */ 158 #define X86_FEATURE_PMM_EN ( 5*32+13) /* PMM enabled */ 159 160 /* More extended AMD flags: CPUID level 0x80000001, ECX, word 6 */ 161 #define X86_FEATURE_LAHF_LM ( 6*32+ 0) /* LAHF/SAHF in long mode */ 162 #define X86_FEATURE_CMP_LEGACY ( 6*32+ 1) /* If yes HyperThreading not valid */ 163 #define X86_FEATURE_SVM ( 6*32+ 2) /* Secure Virtual Machine */ 164 #define X86_FEATURE_EXTAPIC ( 6*32+ 3) /* Extended APIC space */ 165 #define X86_FEATURE_CR8_LEGACY ( 6*32+ 4) /* CR8 in 32-bit mode */ 166 #define X86_FEATURE_ABM ( 6*32+ 5) /* Advanced bit manipulation */ 167 #define X86_FEATURE_SSE4A ( 6*32+ 6) /* SSE-4A */ 168 #define X86_FEATURE_MISALIGNSSE ( 6*32+ 7) /* Misaligned SSE mode */ 169 #define X86_FEATURE_3DNOWPREFETCH ( 6*32+ 8) /* 3DNow prefetch instructions */ 170 #define X86_FEATURE_OSVW ( 6*32+ 9) /* OS Visible Workaround */ 171 #define X86_FEATURE_IBS ( 6*32+10) /* Instruction Based Sampling */ 172 #define X86_FEATURE_XOP ( 6*32+11) /* extended AVX instructions */ 173 #define X86_FEATURE_SKINIT ( 6*32+12) /* SKINIT/STGI instructions */ 174 #define X86_FEATURE_WDT ( 6*32+13) /* Watchdog timer */ 175 #define X86_FEATURE_LWP ( 6*32+15) /* Light Weight Profiling */ 176 #define X86_FEATURE_FMA4 ( 6*32+16) /* 4 operands MAC instructions */ 177 #define X86_FEATURE_TCE ( 6*32+17) /* Translation Cache Extension */ 178 #define X86_FEATURE_NODEID_MSR ( 6*32+19) /* NodeId MSR */ 179 #define X86_FEATURE_TBM ( 6*32+21) /* Trailing Bit Manipulations */ 180 #define X86_FEATURE_TOPOEXT ( 6*32+22) /* Topology extensions CPUID leafs */ 181 #define X86_FEATURE_PERFCTR_CORE ( 6*32+23) /* Core performance counter extensions */ 182 #define X86_FEATURE_PERFCTR_NB ( 6*32+24) /* NB performance counter extensions */ 183 #define X86_FEATURE_BPEXT ( 6*32+26) /* Data breakpoint extension */ 184 #define X86_FEATURE_PTSC ( 6*32+27) /* Performance time-stamp counter */ 185 #define X86_FEATURE_PERFCTR_LLC ( 6*32+28) /* Last Level Cache performance counter extensions */ 186 #define X86_FEATURE_MWAITX ( 6*32+29) /* MWAIT extension (MONITORX/MWAITX instructions) */ 187 188 /* 189 * Auxiliary flags: Linux defined - For features scattered in various 190 * CPUID levels like 0x6, 0xA etc, word 7. 191 * 192 * Reuse free bits when adding new feature flags! 193 */ 194 #define X86_FEATURE_RING3MWAIT ( 7*32+ 0) /* Ring 3 MONITOR/MWAIT instructions */ 195 #define X86_FEATURE_CPUID_FAULT ( 7*32+ 1) /* Intel CPUID faulting */ 196 #define X86_FEATURE_CPB ( 7*32+ 2) /* AMD Core Performance Boost */ 197 #define X86_FEATURE_EPB ( 7*32+ 3) /* IA32_ENERGY_PERF_BIAS support */ 198 #define X86_FEATURE_CAT_L3 ( 7*32+ 4) /* Cache Allocation Technology L3 */ 199 #define X86_FEATURE_CAT_L2 ( 7*32+ 5) /* Cache Allocation Technology L2 */ 200 #define X86_FEATURE_CDP_L3 ( 7*32+ 6) /* Code and Data Prioritization L3 */ 201 #define X86_FEATURE_HW_PSTATE ( 7*32+ 8) /* AMD HW-PState */ 202 #define X86_FEATURE_PROC_FEEDBACK ( 7*32+ 9) /* AMD ProcFeedbackInterface */ 203 #define X86_FEATURE_XCOMPACTED ( 7*32+10) /* "" Use compacted XSTATE (XSAVES or XSAVEC) */ 204 #define X86_FEATURE_PTI ( 7*32+11) /* Kernel Page Table Isolation enabled */ 205 #define X86_FEATURE_KERNEL_IBRS ( 7*32+12) /* "" Set/clear IBRS on kernel entry/exit */ 206 #define X86_FEATURE_RSB_VMEXIT ( 7*32+13) /* "" Fill RSB on VM-Exit */ 207 #define X86_FEATURE_INTEL_PPIN ( 7*32+14) /* Intel Processor Inventory Number */ 208 #define X86_FEATURE_CDP_L2 ( 7*32+15) /* Code and Data Prioritization L2 */ 209 #define X86_FEATURE_MSR_SPEC_CTRL ( 7*32+16) /* "" MSR SPEC_CTRL is implemented */ 210 #define X86_FEATURE_SSBD ( 7*32+17) /* Speculative Store Bypass Disable */ 211 #define X86_FEATURE_MBA ( 7*32+18) /* Memory Bandwidth Allocation */ 212 #define X86_FEATURE_RSB_CTXSW ( 7*32+19) /* "" Fill RSB on context switches */ 213 #define X86_FEATURE_PERFMON_V2 ( 7*32+20) /* AMD Performance Monitoring Version 2 */ 214 #define X86_FEATURE_USE_IBPB ( 7*32+21) /* "" Indirect Branch Prediction Barrier enabled */ 215 #define X86_FEATURE_USE_IBRS_FW ( 7*32+22) /* "" Use IBRS during runtime firmware calls */ 216 #define X86_FEATURE_SPEC_STORE_BYPASS_DISABLE ( 7*32+23) /* "" Disable Speculative Store Bypass. */ 217 #define X86_FEATURE_LS_CFG_SSBD ( 7*32+24) /* "" AMD SSBD implementation via LS_CFG MSR */ 218 #define X86_FEATURE_IBRS ( 7*32+25) /* Indirect Branch Restricted Speculation */ 219 #define X86_FEATURE_IBPB ( 7*32+26) /* "ibpb" Indirect Branch Prediction Barrier without a guaranteed RSB flush */ 220 #define X86_FEATURE_STIBP ( 7*32+27) /* Single Thread Indirect Branch Predictors */ 221 #define X86_FEATURE_ZEN ( 7*32+28) /* "" Generic flag for all Zen and newer */ 222 #define X86_FEATURE_L1TF_PTEINV ( 7*32+29) /* "" L1TF workaround PTE inversion */ 223 #define X86_FEATURE_IBRS_ENHANCED ( 7*32+30) /* Enhanced IBRS */ 224 #define X86_FEATURE_MSR_IA32_FEAT_CTL ( 7*32+31) /* "" MSR IA32_FEAT_CTL configured */ 225 226 /* Virtualization flags: Linux defined, word 8 */ 227 #define X86_FEATURE_TPR_SHADOW ( 8*32+ 0) /* Intel TPR Shadow */ 228 #define X86_FEATURE_FLEXPRIORITY ( 8*32+ 1) /* Intel FlexPriority */ 229 #define X86_FEATURE_EPT ( 8*32+ 2) /* Intel Extended Page Table */ 230 #define X86_FEATURE_VPID ( 8*32+ 3) /* Intel Virtual Processor ID */ 231 232 #define X86_FEATURE_VMMCALL ( 8*32+15) /* Prefer VMMCALL to VMCALL */ 233 #define X86_FEATURE_XENPV ( 8*32+16) /* "" Xen paravirtual guest */ 234 #define X86_FEATURE_EPT_AD ( 8*32+17) /* Intel Extended Page Table access-dirty bit */ 235 #define X86_FEATURE_VMCALL ( 8*32+18) /* "" Hypervisor supports the VMCALL instruction */ 236 #define X86_FEATURE_VMW_VMMCALL ( 8*32+19) /* "" VMware prefers VMMCALL hypercall instruction */ 237 #define X86_FEATURE_PVUNLOCK ( 8*32+20) /* "" PV unlock function */ 238 #define X86_FEATURE_VCPUPREEMPT ( 8*32+21) /* "" PV vcpu_is_preempted function */ 239 #define X86_FEATURE_TDX_GUEST ( 8*32+22) /* Intel Trust Domain Extensions Guest */ 240 241 /* Intel-defined CPU features, CPUID level 0x00000007:0 (EBX), word 9 */ 242 #define X86_FEATURE_FSGSBASE ( 9*32+ 0) /* RDFSBASE, WRFSBASE, RDGSBASE, WRGSBASE instructions*/ 243 #define X86_FEATURE_TSC_ADJUST ( 9*32+ 1) /* TSC adjustment MSR 0x3B */ 244 #define X86_FEATURE_SGX ( 9*32+ 2) /* Software Guard Extensions */ 245 #define X86_FEATURE_BMI1 ( 9*32+ 3) /* 1st group bit manipulation extensions */ 246 #define X86_FEATURE_HLE ( 9*32+ 4) /* Hardware Lock Elision */ 247 #define X86_FEATURE_AVX2 ( 9*32+ 5) /* AVX2 instructions */ 248 #define X86_FEATURE_FDP_EXCPTN_ONLY ( 9*32+ 6) /* "" FPU data pointer updated only on x87 exceptions */ 249 #define X86_FEATURE_SMEP ( 9*32+ 7) /* Supervisor Mode Execution Protection */ 250 #define X86_FEATURE_BMI2 ( 9*32+ 8) /* 2nd group bit manipulation extensions */ 251 #define X86_FEATURE_ERMS ( 9*32+ 9) /* Enhanced REP MOVSB/STOSB instructions */ 252 #define X86_FEATURE_INVPCID ( 9*32+10) /* Invalidate Processor Context ID */ 253 #define X86_FEATURE_RTM ( 9*32+11) /* Restricted Transactional Memory */ 254 #define X86_FEATURE_CQM ( 9*32+12) /* Cache QoS Monitoring */ 255 #define X86_FEATURE_ZERO_FCS_FDS ( 9*32+13) /* "" Zero out FPU CS and FPU DS */ 256 #define X86_FEATURE_MPX ( 9*32+14) /* Memory Protection Extension */ 257 #define X86_FEATURE_RDT_A ( 9*32+15) /* Resource Director Technology Allocation */ 258 #define X86_FEATURE_AVX512F ( 9*32+16) /* AVX-512 Foundation */ 259 #define X86_FEATURE_AVX512DQ ( 9*32+17) /* AVX-512 DQ (Double/Quad granular) Instructions */ 260 #define X86_FEATURE_RDSEED ( 9*32+18) /* RDSEED instruction */ 261 #define X86_FEATURE_ADX ( 9*32+19) /* ADCX and ADOX instructions */ 262 #define X86_FEATURE_SMAP ( 9*32+20) /* Supervisor Mode Access Prevention */ 263 #define X86_FEATURE_AVX512IFMA ( 9*32+21) /* AVX-512 Integer Fused Multiply-Add instructions */ 264 #define X86_FEATURE_CLFLUSHOPT ( 9*32+23) /* CLFLUSHOPT instruction */ 265 #define X86_FEATURE_CLWB ( 9*32+24) /* CLWB instruction */ 266 #define X86_FEATURE_INTEL_PT ( 9*32+25) /* Intel Processor Trace */ 267 #define X86_FEATURE_AVX512PF ( 9*32+26) /* AVX-512 Prefetch */ 268 #define X86_FEATURE_AVX512ER ( 9*32+27) /* AVX-512 Exponential and Reciprocal */ 269 #define X86_FEATURE_AVX512CD ( 9*32+28) /* AVX-512 Conflict Detection */ 270 #define X86_FEATURE_SHA_NI ( 9*32+29) /* SHA1/SHA256 Instruction Extensions */ 271 #define X86_FEATURE_AVX512BW ( 9*32+30) /* AVX-512 BW (Byte/Word granular) Instructions */ 272 #define X86_FEATURE_AVX512VL ( 9*32+31) /* AVX-512 VL (128/256 Vector Length) Extensions */ 273 274 /* Extended state features, CPUID level 0x0000000d:1 (EAX), word 10 */ 275 #define X86_FEATURE_XSAVEOPT (10*32+ 0) /* XSAVEOPT instruction */ 276 #define X86_FEATURE_XSAVEC (10*32+ 1) /* XSAVEC instruction */ 277 #define X86_FEATURE_XGETBV1 (10*32+ 2) /* XGETBV with ECX = 1 instruction */ 278 #define X86_FEATURE_XSAVES (10*32+ 3) /* XSAVES/XRSTORS instructions */ 279 #define X86_FEATURE_XFD (10*32+ 4) /* "" eXtended Feature Disabling */ 280 281 /* 282 * Extended auxiliary flags: Linux defined - for features scattered in various 283 * CPUID levels like 0xf, etc. 284 * 285 * Reuse free bits when adding new feature flags! 286 */ 287 #define X86_FEATURE_CQM_LLC (11*32+ 0) /* LLC QoS if 1 */ 288 #define X86_FEATURE_CQM_OCCUP_LLC (11*32+ 1) /* LLC occupancy monitoring */ 289 #define X86_FEATURE_CQM_MBM_TOTAL (11*32+ 2) /* LLC Total MBM monitoring */ 290 #define X86_FEATURE_CQM_MBM_LOCAL (11*32+ 3) /* LLC Local MBM monitoring */ 291 #define X86_FEATURE_FENCE_SWAPGS_USER (11*32+ 4) /* "" LFENCE in user entry SWAPGS path */ 292 #define X86_FEATURE_FENCE_SWAPGS_KERNEL (11*32+ 5) /* "" LFENCE in kernel entry SWAPGS path */ 293 #define X86_FEATURE_SPLIT_LOCK_DETECT (11*32+ 6) /* #AC for split lock */ 294 #define X86_FEATURE_PER_THREAD_MBA (11*32+ 7) /* "" Per-thread Memory Bandwidth Allocation */ 295 #define X86_FEATURE_SGX1 (11*32+ 8) /* "" Basic SGX */ 296 #define X86_FEATURE_SGX2 (11*32+ 9) /* "" SGX Enclave Dynamic Memory Management (EDMM) */ 297 #define X86_FEATURE_ENTRY_IBPB (11*32+10) /* "" Issue an IBPB on kernel entry */ 298 #define X86_FEATURE_RRSBA_CTRL (11*32+11) /* "" RET prediction control */ 299 #define X86_FEATURE_RETPOLINE (11*32+12) /* "" Generic Retpoline mitigation for Spectre variant 2 */ 300 #define X86_FEATURE_RETPOLINE_LFENCE (11*32+13) /* "" Use LFENCE for Spectre variant 2 */ 301 #define X86_FEATURE_RETHUNK (11*32+14) /* "" Use REturn THUNK */ 302 #define X86_FEATURE_UNRET (11*32+15) /* "" AMD BTB untrain return */ 303 #define X86_FEATURE_USE_IBPB_FW (11*32+16) /* "" Use IBPB during runtime firmware calls */ 304 #define X86_FEATURE_RSB_VMEXIT_LITE (11*32+17) /* "" Fill RSB on VM exit when EIBRS is enabled */ 305 #define X86_FEATURE_SGX_EDECCSSA (11*32+18) /* "" SGX EDECCSSA user leaf function */ 306 #define X86_FEATURE_CALL_DEPTH (11*32+19) /* "" Call depth tracking for RSB stuffing */ 307 #define X86_FEATURE_MSR_TSX_CTRL (11*32+20) /* "" MSR IA32_TSX_CTRL (Intel) implemented */ 308 #define X86_FEATURE_SMBA (11*32+21) /* "" Slow Memory Bandwidth Allocation */ 309 #define X86_FEATURE_BMEC (11*32+22) /* "" Bandwidth Monitoring Event Configuration */ 310 #define X86_FEATURE_USER_SHSTK (11*32+23) /* Shadow stack support for user mode applications */ 311 #define X86_FEATURE_SRSO (11*32+24) /* "" AMD BTB untrain RETs */ 312 #define X86_FEATURE_SRSO_ALIAS (11*32+25) /* "" AMD BTB untrain RETs through aliasing */ 313 #define X86_FEATURE_IBPB_ON_VMEXIT (11*32+26) /* "" Issue an IBPB only on VMEXIT */ 314 #define X86_FEATURE_APIC_MSRS_FENCE (11*32+27) /* "" IA32_TSC_DEADLINE and X2APIC MSRs need fencing */ 315 #define X86_FEATURE_ZEN2 (11*32+28) /* "" CPU based on Zen2 microarchitecture */ 316 #define X86_FEATURE_ZEN3 (11*32+29) /* "" CPU based on Zen3 microarchitecture */ 317 #define X86_FEATURE_ZEN4 (11*32+30) /* "" CPU based on Zen4 microarchitecture */ 318 #define X86_FEATURE_ZEN1 (11*32+31) /* "" CPU based on Zen1 microarchitecture */ 319 320 /* Intel-defined CPU features, CPUID level 0x00000007:1 (EAX), word 12 */ 321 #define X86_FEATURE_AVX_VNNI (12*32+ 4) /* AVX VNNI instructions */ 322 #define X86_FEATURE_AVX512_BF16 (12*32+ 5) /* AVX512 BFLOAT16 instructions */ 323 #define X86_FEATURE_CMPCCXADD (12*32+ 7) /* "" CMPccXADD instructions */ 324 #define X86_FEATURE_ARCH_PERFMON_EXT (12*32+ 8) /* "" Intel Architectural PerfMon Extension */ 325 #define X86_FEATURE_FZRM (12*32+10) /* "" Fast zero-length REP MOVSB */ 326 #define X86_FEATURE_FSRS (12*32+11) /* "" Fast short REP STOSB */ 327 #define X86_FEATURE_FSRC (12*32+12) /* "" Fast short REP {CMPSB,SCASB} */ 328 #define X86_FEATURE_LKGS (12*32+18) /* "" Load "kernel" (userspace) GS */ 329 #define X86_FEATURE_AMX_FP16 (12*32+21) /* "" AMX fp16 Support */ 330 #define X86_FEATURE_AVX_IFMA (12*32+23) /* "" Support for VPMADD52[H,L]UQ */ 331 #define X86_FEATURE_LAM (12*32+26) /* Linear Address Masking */ 332 333 /* AMD-defined CPU features, CPUID level 0x80000008 (EBX), word 13 */ 334 #define X86_FEATURE_CLZERO (13*32+ 0) /* CLZERO instruction */ 335 #define X86_FEATURE_IRPERF (13*32+ 1) /* Instructions Retired Count */ 336 #define X86_FEATURE_XSAVEERPTR (13*32+ 2) /* Always save/restore FP error pointers */ 337 #define X86_FEATURE_RDPRU (13*32+ 4) /* Read processor register at user level */ 338 #define X86_FEATURE_WBNOINVD (13*32+ 9) /* WBNOINVD instruction */ 339 #define X86_FEATURE_AMD_IBPB (13*32+12) /* "" Indirect Branch Prediction Barrier */ 340 #define X86_FEATURE_AMD_IBRS (13*32+14) /* "" Indirect Branch Restricted Speculation */ 341 #define X86_FEATURE_AMD_STIBP (13*32+15) /* "" Single Thread Indirect Branch Predictors */ 342 #define X86_FEATURE_AMD_STIBP_ALWAYS_ON (13*32+17) /* "" Single Thread Indirect Branch Predictors always-on preferred */ 343 #define X86_FEATURE_AMD_PPIN (13*32+23) /* Protected Processor Inventory Number */ 344 #define X86_FEATURE_AMD_SSBD (13*32+24) /* "" Speculative Store Bypass Disable */ 345 #define X86_FEATURE_VIRT_SSBD (13*32+25) /* Virtualized Speculative Store Bypass Disable */ 346 #define X86_FEATURE_AMD_SSB_NO (13*32+26) /* "" Speculative Store Bypass is fixed in hardware. */ 347 #define X86_FEATURE_CPPC (13*32+27) /* Collaborative Processor Performance Control */ 348 #define X86_FEATURE_AMD_PSFD (13*32+28) /* "" Predictive Store Forwarding Disable */ 349 #define X86_FEATURE_BTC_NO (13*32+29) /* "" Not vulnerable to Branch Type Confusion */ 350 #define X86_FEATURE_AMD_IBPB_RET (13*32+30) /* "" IBPB clears return address predictor */ 351 #define X86_FEATURE_BRS (13*32+31) /* Branch Sampling available */ 352 353 /* Thermal and Power Management Leaf, CPUID level 0x00000006 (EAX), word 14 */ 354 #define X86_FEATURE_DTHERM (14*32+ 0) /* Digital Thermal Sensor */ 355 #define X86_FEATURE_IDA (14*32+ 1) /* Intel Dynamic Acceleration */ 356 #define X86_FEATURE_ARAT (14*32+ 2) /* Always Running APIC Timer */ 357 #define X86_FEATURE_PLN (14*32+ 4) /* Intel Power Limit Notification */ 358 #define X86_FEATURE_PTS (14*32+ 6) /* Intel Package Thermal Status */ 359 #define X86_FEATURE_HWP (14*32+ 7) /* Intel Hardware P-states */ 360 #define X86_FEATURE_HWP_NOTIFY (14*32+ 8) /* HWP Notification */ 361 #define X86_FEATURE_HWP_ACT_WINDOW (14*32+ 9) /* HWP Activity Window */ 362 #define X86_FEATURE_HWP_EPP (14*32+10) /* HWP Energy Perf. Preference */ 363 #define X86_FEATURE_HWP_PKG_REQ (14*32+11) /* HWP Package Level Request */ 364 #define X86_FEATURE_HFI (14*32+19) /* Hardware Feedback Interface */ 365 366 /* AMD SVM Feature Identification, CPUID level 0x8000000a (EDX), word 15 */ 367 #define X86_FEATURE_NPT (15*32+ 0) /* Nested Page Table support */ 368 #define X86_FEATURE_LBRV (15*32+ 1) /* LBR Virtualization support */ 369 #define X86_FEATURE_SVML (15*32+ 2) /* "svm_lock" SVM locking MSR */ 370 #define X86_FEATURE_NRIPS (15*32+ 3) /* "nrip_save" SVM next_rip save */ 371 #define X86_FEATURE_TSCRATEMSR (15*32+ 4) /* "tsc_scale" TSC scaling support */ 372 #define X86_FEATURE_VMCBCLEAN (15*32+ 5) /* "vmcb_clean" VMCB clean bits support */ 373 #define X86_FEATURE_FLUSHBYASID (15*32+ 6) /* flush-by-ASID support */ 374 #define X86_FEATURE_DECODEASSISTS (15*32+ 7) /* Decode Assists support */ 375 #define X86_FEATURE_PAUSEFILTER (15*32+10) /* filtered pause intercept */ 376 #define X86_FEATURE_PFTHRESHOLD (15*32+12) /* pause filter threshold */ 377 #define X86_FEATURE_AVIC (15*32+13) /* Virtual Interrupt Controller */ 378 #define X86_FEATURE_V_VMSAVE_VMLOAD (15*32+15) /* Virtual VMSAVE VMLOAD */ 379 #define X86_FEATURE_VGIF (15*32+16) /* Virtual GIF */ 380 #define X86_FEATURE_X2AVIC (15*32+18) /* Virtual x2apic */ 381 #define X86_FEATURE_V_SPEC_CTRL (15*32+20) /* Virtual SPEC_CTRL */ 382 #define X86_FEATURE_VNMI (15*32+25) /* Virtual NMI */ 383 #define X86_FEATURE_SVME_ADDR_CHK (15*32+28) /* "" SVME addr check */ 384 385 /* Intel-defined CPU features, CPUID level 0x00000007:0 (ECX), word 16 */ 386 #define X86_FEATURE_AVX512VBMI (16*32+ 1) /* AVX512 Vector Bit Manipulation instructions*/ 387 #define X86_FEATURE_UMIP (16*32+ 2) /* User Mode Instruction Protection */ 388 #define X86_FEATURE_PKU (16*32+ 3) /* Protection Keys for Userspace */ 389 #define X86_FEATURE_OSPKE (16*32+ 4) /* OS Protection Keys Enable */ 390 #define X86_FEATURE_WAITPKG (16*32+ 5) /* UMONITOR/UMWAIT/TPAUSE Instructions */ 391 #define X86_FEATURE_AVX512_VBMI2 (16*32+ 6) /* Additional AVX512 Vector Bit Manipulation Instructions */ 392 #define X86_FEATURE_SHSTK (16*32+ 7) /* "" Shadow stack */ 393 #define X86_FEATURE_GFNI (16*32+ 8) /* Galois Field New Instructions */ 394 #define X86_FEATURE_VAES (16*32+ 9) /* Vector AES */ 395 #define X86_FEATURE_VPCLMULQDQ (16*32+10) /* Carry-Less Multiplication Double Quadword */ 396 #define X86_FEATURE_AVX512_VNNI (16*32+11) /* Vector Neural Network Instructions */ 397 #define X86_FEATURE_AVX512_BITALG (16*32+12) /* Support for VPOPCNT[B,W] and VPSHUF-BITQMB instructions */ 398 #define X86_FEATURE_TME (16*32+13) /* Intel Total Memory Encryption */ 399 #define X86_FEATURE_AVX512_VPOPCNTDQ (16*32+14) /* POPCNT for vectors of DW/QW */ 400 #define X86_FEATURE_LA57 (16*32+16) /* 5-level page tables */ 401 #define X86_FEATURE_RDPID (16*32+22) /* RDPID instruction */ 402 #define X86_FEATURE_BUS_LOCK_DETECT (16*32+24) /* Bus Lock detect */ 403 #define X86_FEATURE_CLDEMOTE (16*32+25) /* CLDEMOTE instruction */ 404 #define X86_FEATURE_MOVDIRI (16*32+27) /* MOVDIRI instruction */ 405 #define X86_FEATURE_MOVDIR64B (16*32+28) /* MOVDIR64B instruction */ 406 #define X86_FEATURE_ENQCMD (16*32+29) /* ENQCMD and ENQCMDS instructions */ 407 #define X86_FEATURE_SGX_LC (16*32+30) /* Software Guard Extensions Launch Control */ 408 409 /* AMD-defined CPU features, CPUID level 0x80000007 (EBX), word 17 */ 410 #define X86_FEATURE_OVERFLOW_RECOV (17*32+ 0) /* MCA overflow recovery support */ 411 #define X86_FEATURE_SUCCOR (17*32+ 1) /* Uncorrectable error containment and recovery */ 412 #define X86_FEATURE_SMCA (17*32+ 3) /* Scalable MCA */ 413 414 /* Intel-defined CPU features, CPUID level 0x00000007:0 (EDX), word 18 */ 415 #define X86_FEATURE_AVX512_4VNNIW (18*32+ 2) /* AVX-512 Neural Network Instructions */ 416 #define X86_FEATURE_AVX512_4FMAPS (18*32+ 3) /* AVX-512 Multiply Accumulation Single precision */ 417 #define X86_FEATURE_FSRM (18*32+ 4) /* Fast Short Rep Mov */ 418 #define X86_FEATURE_AVX512_VP2INTERSECT (18*32+ 8) /* AVX-512 Intersect for D/Q */ 419 #define X86_FEATURE_SRBDS_CTRL (18*32+ 9) /* "" SRBDS mitigation MSR available */ 420 #define X86_FEATURE_MD_CLEAR (18*32+10) /* VERW clears CPU buffers */ 421 #define X86_FEATURE_RTM_ALWAYS_ABORT (18*32+11) /* "" RTM transaction always aborts */ 422 #define X86_FEATURE_TSX_FORCE_ABORT (18*32+13) /* "" TSX_FORCE_ABORT */ 423 #define X86_FEATURE_SERIALIZE (18*32+14) /* SERIALIZE instruction */ 424 #define X86_FEATURE_HYBRID_CPU (18*32+15) /* "" This part has CPUs of more than one type */ 425 #define X86_FEATURE_TSXLDTRK (18*32+16) /* TSX Suspend Load Address Tracking */ 426 #define X86_FEATURE_PCONFIG (18*32+18) /* Intel PCONFIG */ 427 #define X86_FEATURE_ARCH_LBR (18*32+19) /* Intel ARCH LBR */ 428 #define X86_FEATURE_IBT (18*32+20) /* Indirect Branch Tracking */ 429 #define X86_FEATURE_AMX_BF16 (18*32+22) /* AMX bf16 Support */ 430 #define X86_FEATURE_AVX512_FP16 (18*32+23) /* AVX512 FP16 */ 431 #define X86_FEATURE_AMX_TILE (18*32+24) /* AMX tile Support */ 432 #define X86_FEATURE_AMX_INT8 (18*32+25) /* AMX int8 Support */ 433 #define X86_FEATURE_SPEC_CTRL (18*32+26) /* "" Speculation Control (IBRS + IBPB) */ 434 #define X86_FEATURE_INTEL_STIBP (18*32+27) /* "" Single Thread Indirect Branch Predictors */ 435 #define X86_FEATURE_FLUSH_L1D (18*32+28) /* Flush L1D cache */ 436 #define X86_FEATURE_ARCH_CAPABILITIES (18*32+29) /* IA32_ARCH_CAPABILITIES MSR (Intel) */ 437 #define X86_FEATURE_CORE_CAPABILITIES (18*32+30) /* "" IA32_CORE_CAPABILITIES MSR */ 438 #define X86_FEATURE_SPEC_CTRL_SSBD (18*32+31) /* "" Speculative Store Bypass Disable */ 439 440 /* AMD-defined memory encryption features, CPUID level 0x8000001f (EAX), word 19 */ 441 #define X86_FEATURE_SME (19*32+ 0) /* AMD Secure Memory Encryption */ 442 #define X86_FEATURE_SEV (19*32+ 1) /* AMD Secure Encrypted Virtualization */ 443 #define X86_FEATURE_VM_PAGE_FLUSH (19*32+ 2) /* "" VM Page Flush MSR is supported */ 444 #define X86_FEATURE_SEV_ES (19*32+ 3) /* AMD Secure Encrypted Virtualization - Encrypted State */ 445 #define X86_FEATURE_V_TSC_AUX (19*32+ 9) /* "" Virtual TSC_AUX */ 446 #define X86_FEATURE_SME_COHERENT (19*32+10) /* "" AMD hardware-enforced cache coherency */ 447 #define X86_FEATURE_DEBUG_SWAP (19*32+14) /* AMD SEV-ES full debug state swap support */ 448 449 /* AMD-defined Extended Feature 2 EAX, CPUID level 0x80000021 (EAX), word 20 */ 450 #define X86_FEATURE_NO_NESTED_DATA_BP (20*32+ 0) /* "" No Nested Data Breakpoints */ 451 #define X86_FEATURE_LFENCE_RDTSC (20*32+ 2) /* "" LFENCE always serializing / synchronizes RDTSC */ 452 #define X86_FEATURE_NULL_SEL_CLR_BASE (20*32+ 6) /* "" Null Selector Clears Base */ 453 #define X86_FEATURE_AUTOIBRS (20*32+ 8) /* "" Automatic IBRS */ 454 #define X86_FEATURE_NO_SMM_CTL_MSR (20*32+ 9) /* "" SMM_CTL MSR is not present */ 455 456 #define X86_FEATURE_SBPB (20*32+27) /* "" Selective Branch Prediction Barrier */ 457 #define X86_FEATURE_IBPB_BRTYPE (20*32+28) /* "" MSR_PRED_CMD[IBPB] flushes all branch type predictions */ 458 #define X86_FEATURE_SRSO_NO (20*32+29) /* "" CPU is not affected by SRSO */ 459 460 /* 461 * Extended auxiliary flags: Linux defined - for features scattered in various 462 * CPUID levels like 0x80000022, etc and Linux defined features. 463 * 464 * Reuse free bits when adding new feature flags! 465 */ 466 #define X86_FEATURE_AMD_LBR_PMC_FREEZE (21*32+ 0) /* AMD LBR and PMC Freeze */ 467 #define X86_FEATURE_CLEAR_BHB_LOOP (21*32+ 1) /* "" Clear branch history at syscall entry using SW loop */ 468 #define X86_FEATURE_BHI_CTRL (21*32+ 2) /* "" BHI_DIS_S HW control available */ 469 #define X86_FEATURE_CLEAR_BHB_HW (21*32+ 3) /* "" BHI_DIS_S HW control enabled */ 470 #define X86_FEATURE_CLEAR_BHB_LOOP_ON_VMEXIT (21*32+ 4) /* "" Clear branch history at vmexit using SW loop */ 471 472 /* 473 * BUG word(s) 474 */ 475 #define X86_BUG(x) (NCAPINTS*32 + (x)) 476 477 #define X86_BUG_F00F X86_BUG(0) /* Intel F00F */ 478 #define X86_BUG_FDIV X86_BUG(1) /* FPU FDIV */ 479 #define X86_BUG_COMA X86_BUG(2) /* Cyrix 6x86 coma */ 480 #define X86_BUG_AMD_TLB_MMATCH X86_BUG(3) /* "tlb_mmatch" AMD Erratum 383 */ 481 #define X86_BUG_AMD_APIC_C1E X86_BUG(4) /* "apic_c1e" AMD Erratum 400 */ 482 #define X86_BUG_11AP X86_BUG(5) /* Bad local APIC aka 11AP */ 483 #define X86_BUG_FXSAVE_LEAK X86_BUG(6) /* FXSAVE leaks FOP/FIP/FOP */ 484 #define X86_BUG_CLFLUSH_MONITOR X86_BUG(7) /* AAI65, CLFLUSH required before MONITOR */ 485 #define X86_BUG_SYSRET_SS_ATTRS X86_BUG(8) /* SYSRET doesn't fix up SS attrs */ 486 #ifdef CONFIG_X86_32 487 /* 488 * 64-bit kernels don't use X86_BUG_ESPFIX. Make the define conditional 489 * to avoid confusion. 490 */ 491 #define X86_BUG_ESPFIX X86_BUG(9) /* "" IRET to 16-bit SS corrupts ESP/RSP high bits */ 492 #endif 493 #define X86_BUG_NULL_SEG X86_BUG(10) /* Nulling a selector preserves the base */ 494 #define X86_BUG_SWAPGS_FENCE X86_BUG(11) /* SWAPGS without input dep on GS */ 495 #define X86_BUG_MONITOR X86_BUG(12) /* IPI required to wake up remote CPU */ 496 #define X86_BUG_AMD_E400 X86_BUG(13) /* CPU is among the affected by Erratum 400 */ 497 #define X86_BUG_CPU_MELTDOWN X86_BUG(14) /* CPU is affected by meltdown attack and needs kernel page table isolation */ 498 #define X86_BUG_SPECTRE_V1 X86_BUG(15) /* CPU is affected by Spectre variant 1 attack with conditional branches */ 499 #define X86_BUG_SPECTRE_V2 X86_BUG(16) /* CPU is affected by Spectre variant 2 attack with indirect branches */ 500 #define X86_BUG_SPEC_STORE_BYPASS X86_BUG(17) /* CPU is affected by speculative store bypass attack */ 501 #define X86_BUG_L1TF X86_BUG(18) /* CPU is affected by L1 Terminal Fault */ 502 #define X86_BUG_MDS X86_BUG(19) /* CPU is affected by Microarchitectural data sampling */ 503 #define X86_BUG_MSBDS_ONLY X86_BUG(20) /* CPU is only affected by the MSDBS variant of BUG_MDS */ 504 #define X86_BUG_SWAPGS X86_BUG(21) /* CPU is affected by speculation through SWAPGS */ 505 #define X86_BUG_TAA X86_BUG(22) /* CPU is affected by TSX Async Abort(TAA) */ 506 #define X86_BUG_ITLB_MULTIHIT X86_BUG(23) /* CPU may incur MCE during certain page attribute changes */ 507 #define X86_BUG_SRBDS X86_BUG(24) /* CPU may leak RNG bits if not mitigated */ 508 #define X86_BUG_MMIO_STALE_DATA X86_BUG(25) /* CPU is affected by Processor MMIO Stale Data vulnerabilities */ 509 #define X86_BUG_MMIO_UNKNOWN X86_BUG(26) /* CPU is too old and its MMIO Stale Data status is unknown */ 510 #define X86_BUG_RETBLEED X86_BUG(27) /* CPU is affected by RETBleed */ 511 #define X86_BUG_EIBRS_PBRSB X86_BUG(28) /* EIBRS is vulnerable to Post Barrier RSB Predictions */ 512 #define X86_BUG_SMT_RSB X86_BUG(29) /* CPU is vulnerable to Cross-Thread Return Address Predictions */ 513 #define X86_BUG_GDS X86_BUG(30) /* CPU is affected by Gather Data Sampling */ 514 515 /* BUG word 2 */ 516 #define X86_BUG_SRSO X86_BUG(1*32 + 0) /* AMD SRSO bug */ 517 #define X86_BUG_DIV0 X86_BUG(1*32 + 1) /* AMD DIV0 speculation bug */ 518 #define X86_BUG_RFDS X86_BUG(1*32 + 2) /* CPU is vulnerable to Register File Data Sampling */ 519 #define X86_BUG_BHI X86_BUG(1*32 + 3) /* CPU is affected by Branch History Injection */ 520 #define X86_BUG_IBPB_NO_RET X86_BUG(1*32 + 4) /* "ibpb_no_ret" IBPB omits return target predictions */ 521 #endif /* _ASM_X86_CPUFEATURES_H */ 522