1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _ASM_X86_CPUFEATURES_H
3#define _ASM_X86_CPUFEATURES_H
4
5/*
6 * Defines x86 CPU feature bits
7 */
8#define NCAPINTS 22 /* N 32-bit words worth of info */
9#define NBUGINTS 2 /* N 32-bit bug flags */
10
11/*
12 * Note: If the comment begins with a quoted string, that string is used
13 * in /proc/cpuinfo instead of the macro name. Otherwise, this feature
14 * bit is not displayed in /proc/cpuinfo at all.
15 *
16 * When adding new features here that depend on other features,
17 * please update the table in kernel/cpu/cpuid-deps.c as well.
18 */
19
20/* Intel-defined CPU features, CPUID level 0x00000001 (EDX), word 0 */
21#define X86_FEATURE_FPU ( 0*32+ 0) /* "fpu" Onboard FPU */
22#define X86_FEATURE_VME ( 0*32+ 1) /* "vme" Virtual Mode Extensions */
23#define X86_FEATURE_DE ( 0*32+ 2) /* "de" Debugging Extensions */
24#define X86_FEATURE_PSE ( 0*32+ 3) /* "pse" Page Size Extensions */
25#define X86_FEATURE_TSC ( 0*32+ 4) /* "tsc" Time Stamp Counter */
26#define X86_FEATURE_MSR ( 0*32+ 5) /* "msr" Model-Specific Registers */
27#define X86_FEATURE_PAE ( 0*32+ 6) /* "pae" Physical Address Extensions */
28#define X86_FEATURE_MCE ( 0*32+ 7) /* "mce" Machine Check Exception */
29#define X86_FEATURE_CX8 ( 0*32+ 8) /* "cx8" CMPXCHG8 instruction */
30#define X86_FEATURE_APIC ( 0*32+ 9) /* "apic" Onboard APIC */
31#define X86_FEATURE_SEP ( 0*32+11) /* "sep" SYSENTER/SYSEXIT */
32#define X86_FEATURE_MTRR ( 0*32+12) /* "mtrr" Memory Type Range Registers */
33#define X86_FEATURE_PGE ( 0*32+13) /* "pge" Page Global Enable */
34#define X86_FEATURE_MCA ( 0*32+14) /* "mca" Machine Check Architecture */
35#define X86_FEATURE_CMOV ( 0*32+15) /* "cmov" CMOV instructions (plus FCMOVcc, FCOMI with FPU) */
36#define X86_FEATURE_PAT ( 0*32+16) /* "pat" Page Attribute Table */
37#define X86_FEATURE_PSE36 ( 0*32+17) /* "pse36" 36-bit PSEs */
38#define X86_FEATURE_PN ( 0*32+18) /* "pn" Processor serial number */
39#define X86_FEATURE_CLFLUSH ( 0*32+19) /* "clflush" CLFLUSH instruction */
40#define X86_FEATURE_DS ( 0*32+21) /* "dts" Debug Store */
41#define X86_FEATURE_ACPI ( 0*32+22) /* "acpi" ACPI via MSR */
42#define X86_FEATURE_MMX ( 0*32+23) /* "mmx" Multimedia Extensions */
43#define X86_FEATURE_FXSR ( 0*32+24) /* "fxsr" FXSAVE/FXRSTOR, CR4.OSFXSR */
44#define X86_FEATURE_XMM ( 0*32+25) /* "sse" */
45#define X86_FEATURE_XMM2 ( 0*32+26) /* "sse2" */
46#define X86_FEATURE_SELFSNOOP ( 0*32+27) /* "ss" CPU self snoop */
47#define X86_FEATURE_HT ( 0*32+28) /* "ht" Hyper-Threading */
48#define X86_FEATURE_ACC ( 0*32+29) /* "tm" Automatic clock control */
49#define X86_FEATURE_IA64 ( 0*32+30) /* "ia64" IA-64 processor */
50#define X86_FEATURE_PBE ( 0*32+31) /* "pbe" Pending Break Enable */
51
52/* AMD-defined CPU features, CPUID level 0x80000001, word 1 */
53/* Don't duplicate feature flags which are redundant with Intel! */
54#define X86_FEATURE_SYSCALL ( 1*32+11) /* "syscall" SYSCALL/SYSRET */
55#define X86_FEATURE_MP ( 1*32+19) /* "mp" MP Capable */
56#define X86_FEATURE_NX ( 1*32+20) /* "nx" Execute Disable */
57#define X86_FEATURE_MMXEXT ( 1*32+22) /* "mmxext" AMD MMX extensions */
58#define X86_FEATURE_FXSR_OPT ( 1*32+25) /* "fxsr_opt" FXSAVE/FXRSTOR optimizations */
59#define X86_FEATURE_GBPAGES ( 1*32+26) /* "pdpe1gb" GB pages */
60#define X86_FEATURE_RDTSCP ( 1*32+27) /* "rdtscp" RDTSCP */
61#define X86_FEATURE_LM ( 1*32+29) /* "lm" Long Mode (x86-64, 64-bit support) */
62#define X86_FEATURE_3DNOWEXT ( 1*32+30) /* "3dnowext" AMD 3DNow extensions */
63#define X86_FEATURE_3DNOW ( 1*32+31) /* "3dnow" 3DNow */
64
65/* Transmeta-defined CPU features, CPUID level 0x80860001, word 2 */
66#define X86_FEATURE_RECOVERY ( 2*32+ 0) /* "recovery" CPU in recovery mode */
67#define X86_FEATURE_LONGRUN ( 2*32+ 1) /* "longrun" Longrun power control */
68#define X86_FEATURE_LRTI ( 2*32+ 3) /* "lrti" LongRun table interface */
69
70/* Other features, Linux-defined mapping, word 3 */
71/* This range is used for feature bits which conflict or are synthesized */
72#define X86_FEATURE_CXMMX ( 3*32+ 0) /* "cxmmx" Cyrix MMX extensions */
73#define X86_FEATURE_K6_MTRR ( 3*32+ 1) /* "k6_mtrr" AMD K6 nonstandard MTRRs */
74#define X86_FEATURE_CYRIX_ARR ( 3*32+ 2) /* "cyrix_arr" Cyrix ARRs (= MTRRs) */
75#define X86_FEATURE_CENTAUR_MCR ( 3*32+ 3) /* "centaur_mcr" Centaur MCRs (= MTRRs) */
76#define X86_FEATURE_K8 ( 3*32+ 4) /* Opteron, Athlon64 */
77#define X86_FEATURE_ZEN5 ( 3*32+ 5) /* CPU based on Zen5 microarchitecture */
78#define X86_FEATURE_ZEN6 ( 3*32+ 6) /* CPU based on Zen6 microarchitecture */
79/* Free ( 3*32+ 7) */
80#define X86_FEATURE_CONSTANT_TSC ( 3*32+ 8) /* "constant_tsc" TSC ticks at a constant rate */
81#define X86_FEATURE_UP ( 3*32+ 9) /* "up" SMP kernel running on UP */
82#define X86_FEATURE_ART ( 3*32+10) /* "art" Always running timer (ART) */
83#define X86_FEATURE_ARCH_PERFMON ( 3*32+11) /* "arch_perfmon" Intel Architectural PerfMon */
84#define X86_FEATURE_PEBS ( 3*32+12) /* "pebs" Precise-Event Based Sampling */
85#define X86_FEATURE_BTS ( 3*32+13) /* "bts" Branch Trace Store */
86#define X86_FEATURE_SYSCALL32 ( 3*32+14) /* syscall in IA32 userspace */
87#define X86_FEATURE_SYSENTER32 ( 3*32+15) /* sysenter in IA32 userspace */
88#define X86_FEATURE_REP_GOOD ( 3*32+16) /* "rep_good" REP microcode works well */
89#define X86_FEATURE_AMD_LBR_V2 ( 3*32+17) /* "amd_lbr_v2" AMD Last Branch Record Extension Version 2 */
90#define X86_FEATURE_CLEAR_CPU_BUF ( 3*32+18) /* Clear CPU buffers using VERW */
91#define X86_FEATURE_ACC_POWER ( 3*32+19) /* "acc_power" AMD Accumulated Power Mechanism */
92#define X86_FEATURE_NOPL ( 3*32+20) /* "nopl" The NOPL (0F 1F) instructions */
93#define X86_FEATURE_ALWAYS ( 3*32+21) /* Always-present feature */
94#define X86_FEATURE_XTOPOLOGY ( 3*32+22) /* "xtopology" CPU topology enum extensions */
95#define X86_FEATURE_TSC_RELIABLE ( 3*32+23) /* "tsc_reliable" TSC is known to be reliable */
96#define X86_FEATURE_NONSTOP_TSC ( 3*32+24) /* "nonstop_tsc" TSC does not stop in C states */
97#define X86_FEATURE_CPUID ( 3*32+25) /* "cpuid" CPU has CPUID instruction itself */
98#define X86_FEATURE_EXTD_APICID ( 3*32+26) /* "extd_apicid" Extended APICID (8 bits) */
99#define X86_FEATURE_AMD_DCM ( 3*32+27) /* "amd_dcm" AMD multi-node processor */
100#define X86_FEATURE_APERFMPERF ( 3*32+28) /* "aperfmperf" P-State hardware coordination feedback capability (APERF/MPERF MSRs) */
101#define X86_FEATURE_RAPL ( 3*32+29) /* "rapl" AMD/Hygon RAPL interface */
102#define X86_FEATURE_NONSTOP_TSC_S3 ( 3*32+30) /* "nonstop_tsc_s3" TSC doesn't stop in S3 state */
103#define X86_FEATURE_TSC_KNOWN_FREQ ( 3*32+31) /* "tsc_known_freq" TSC has known frequency */
104
105/* Intel-defined CPU features, CPUID level 0x00000001 (ECX), word 4 */
106#define X86_FEATURE_XMM3 ( 4*32+ 0) /* "pni" SSE-3 */
107#define X86_FEATURE_PCLMULQDQ ( 4*32+ 1) /* "pclmulqdq" PCLMULQDQ instruction */
108#define X86_FEATURE_DTES64 ( 4*32+ 2) /* "dtes64" 64-bit Debug Store */
109#define X86_FEATURE_MWAIT ( 4*32+ 3) /* "monitor" MONITOR/MWAIT support */
110#define X86_FEATURE_DSCPL ( 4*32+ 4) /* "ds_cpl" CPL-qualified (filtered) Debug Store */
111#define X86_FEATURE_VMX ( 4*32+ 5) /* "vmx" Hardware virtualization */
112#define X86_FEATURE_SMX ( 4*32+ 6) /* "smx" Safer Mode eXtensions */
113#define X86_FEATURE_EST ( 4*32+ 7) /* "est" Enhanced SpeedStep */
114#define X86_FEATURE_TM2 ( 4*32+ 8) /* "tm2" Thermal Monitor 2 */
115#define X86_FEATURE_SSSE3 ( 4*32+ 9) /* "ssse3" Supplemental SSE-3 */
116#define X86_FEATURE_CID ( 4*32+10) /* "cid" Context ID */
117#define X86_FEATURE_SDBG ( 4*32+11) /* "sdbg" Silicon Debug */
118#define X86_FEATURE_FMA ( 4*32+12) /* "fma" Fused multiply-add */
119#define X86_FEATURE_CX16 ( 4*32+13) /* "cx16" CMPXCHG16B instruction */
120#define X86_FEATURE_XTPR ( 4*32+14) /* "xtpr" Send Task Priority Messages */
121#define X86_FEATURE_PDCM ( 4*32+15) /* "pdcm" Perf/Debug Capabilities MSR */
122#define X86_FEATURE_PCID ( 4*32+17) /* "pcid" Process Context Identifiers */
123#define X86_FEATURE_DCA ( 4*32+18) /* "dca" Direct Cache Access */
124#define X86_FEATURE_XMM4_1 ( 4*32+19) /* "sse4_1" SSE-4.1 */
125#define X86_FEATURE_XMM4_2 ( 4*32+20) /* "sse4_2" SSE-4.2 */
126#define X86_FEATURE_X2APIC ( 4*32+21) /* "x2apic" X2APIC */
127#define X86_FEATURE_MOVBE ( 4*32+22) /* "movbe" MOVBE instruction */
128#define X86_FEATURE_POPCNT ( 4*32+23) /* "popcnt" POPCNT instruction */
129#define X86_FEATURE_TSC_DEADLINE_TIMER ( 4*32+24) /* "tsc_deadline_timer" TSC deadline timer */
130#define X86_FEATURE_AES ( 4*32+25) /* "aes" AES instructions */
131#define X86_FEATURE_XSAVE ( 4*32+26) /* "xsave" XSAVE/XRSTOR/XSETBV/XGETBV instructions */
132#define X86_FEATURE_OSXSAVE ( 4*32+27) /* XSAVE instruction enabled in the OS */
133#define X86_FEATURE_AVX ( 4*32+28) /* "avx" Advanced Vector Extensions */
134#define X86_FEATURE_F16C ( 4*32+29) /* "f16c" 16-bit FP conversions */
135#define X86_FEATURE_RDRAND ( 4*32+30) /* "rdrand" RDRAND instruction */
136#define X86_FEATURE_HYPERVISOR ( 4*32+31) /* "hypervisor" Running on a hypervisor */
137
138/* VIA/Cyrix/Centaur-defined CPU features, CPUID level 0xC0000001, word 5 */
139#define X86_FEATURE_XSTORE ( 5*32+ 2) /* "rng" RNG present (xstore) */
140#define X86_FEATURE_XSTORE_EN ( 5*32+ 3) /* "rng_en" RNG enabled */
141#define X86_FEATURE_XCRYPT ( 5*32+ 6) /* "ace" on-CPU crypto (xcrypt) */
142#define X86_FEATURE_XCRYPT_EN ( 5*32+ 7) /* "ace_en" on-CPU crypto enabled */
143#define X86_FEATURE_ACE2 ( 5*32+ 8) /* "ace2" Advanced Cryptography Engine v2 */
144#define X86_FEATURE_ACE2_EN ( 5*32+ 9) /* "ace2_en" ACE v2 enabled */
145#define X86_FEATURE_PHE ( 5*32+10) /* "phe" PadLock Hash Engine */
146#define X86_FEATURE_PHE_EN ( 5*32+11) /* "phe_en" PHE enabled */
147#define X86_FEATURE_PMM ( 5*32+12) /* "pmm" PadLock Montgomery Multiplier */
148#define X86_FEATURE_PMM_EN ( 5*32+13) /* "pmm_en" PMM enabled */
149
150/* More extended AMD flags: CPUID level 0x80000001, ECX, word 6 */
151#define X86_FEATURE_LAHF_LM ( 6*32+ 0) /* "lahf_lm" LAHF/SAHF in long mode */
152#define X86_FEATURE_CMP_LEGACY ( 6*32+ 1) /* "cmp_legacy" If yes HyperThreading not valid */
153#define X86_FEATURE_SVM ( 6*32+ 2) /* "svm" Secure Virtual Machine */
154#define X86_FEATURE_EXTAPIC ( 6*32+ 3) /* "extapic" Extended APIC space */
155#define X86_FEATURE_CR8_LEGACY ( 6*32+ 4) /* "cr8_legacy" CR8 in 32-bit mode */
156#define X86_FEATURE_ABM ( 6*32+ 5) /* "abm" Advanced bit manipulation */
157#define X86_FEATURE_SSE4A ( 6*32+ 6) /* "sse4a" SSE-4A */
158#define X86_FEATURE_MISALIGNSSE ( 6*32+ 7) /* "misalignsse" Misaligned SSE mode */
159#define X86_FEATURE_3DNOWPREFETCH ( 6*32+ 8) /* "3dnowprefetch" 3DNow prefetch instructions */
160#define X86_FEATURE_OSVW ( 6*32+ 9) /* "osvw" OS Visible Workaround */
161#define X86_FEATURE_IBS ( 6*32+10) /* "ibs" Instruction Based Sampling */
162#define X86_FEATURE_XOP ( 6*32+11) /* "xop" Extended AVX instructions */
163#define X86_FEATURE_SKINIT ( 6*32+12) /* "skinit" SKINIT/STGI instructions */
164#define X86_FEATURE_WDT ( 6*32+13) /* "wdt" Watchdog timer */
165#define X86_FEATURE_LWP ( 6*32+15) /* "lwp" Light Weight Profiling */
166#define X86_FEATURE_FMA4 ( 6*32+16) /* "fma4" 4 operands MAC instructions */
167#define X86_FEATURE_TCE ( 6*32+17) /* "tce" Translation Cache Extension */
168#define X86_FEATURE_NODEID_MSR ( 6*32+19) /* "nodeid_msr" NodeId MSR */
169#define X86_FEATURE_TBM ( 6*32+21) /* "tbm" Trailing Bit Manipulations */
170#define X86_FEATURE_TOPOEXT ( 6*32+22) /* "topoext" Topology extensions CPUID leafs */
171#define X86_FEATURE_PERFCTR_CORE ( 6*32+23) /* "perfctr_core" Core performance counter extensions */
172#define X86_FEATURE_PERFCTR_NB ( 6*32+24) /* "perfctr_nb" NB performance counter extensions */
173#define X86_FEATURE_BPEXT ( 6*32+26) /* "bpext" Data breakpoint extension */
174#define X86_FEATURE_PTSC ( 6*32+27) /* "ptsc" Performance time-stamp counter */
175#define X86_FEATURE_PERFCTR_LLC ( 6*32+28) /* "perfctr_llc" Last Level Cache performance counter extensions */
176#define X86_FEATURE_MWAITX ( 6*32+29) /* "mwaitx" MWAIT extension (MONITORX/MWAITX instructions) */
177
178/*
179 * Auxiliary flags: Linux defined - For features scattered in various
180 * CPUID levels like 0x6, 0xA etc, word 7.
181 *
182 * Reuse free bits when adding new feature flags!
183 */
184#define X86_FEATURE_RING3MWAIT ( 7*32+ 0) /* "ring3mwait" Ring 3 MONITOR/MWAIT instructions */
185#define X86_FEATURE_CPUID_FAULT ( 7*32+ 1) /* "cpuid_fault" Intel CPUID faulting */
186#define X86_FEATURE_CPB ( 7*32+ 2) /* "cpb" AMD Core Performance Boost */
187#define X86_FEATURE_EPB ( 7*32+ 3) /* "epb" IA32_ENERGY_PERF_BIAS support */
188#define X86_FEATURE_CAT_L3 ( 7*32+ 4) /* "cat_l3" Cache Allocation Technology L3 */
189#define X86_FEATURE_CAT_L2 ( 7*32+ 5) /* "cat_l2" Cache Allocation Technology L2 */
190#define X86_FEATURE_CDP_L3 ( 7*32+ 6) /* "cdp_l3" Code and Data Prioritization L3 */
191#define X86_FEATURE_TDX_HOST_PLATFORM ( 7*32+ 7) /* "tdx_host_platform" Platform supports being a TDX host */
192#define X86_FEATURE_HW_PSTATE ( 7*32+ 8) /* "hw_pstate" AMD HW-PState */
193#define X86_FEATURE_PROC_FEEDBACK ( 7*32+ 9) /* "proc_feedback" AMD ProcFeedbackInterface */
194#define X86_FEATURE_XCOMPACTED ( 7*32+10) /* Use compacted XSTATE (XSAVES or XSAVEC) */
195#define X86_FEATURE_PTI ( 7*32+11) /* "pti" Kernel Page Table Isolation enabled */
196#define X86_FEATURE_KERNEL_IBRS ( 7*32+12) /* Set/clear IBRS on kernel entry/exit */
197#define X86_FEATURE_RSB_VMEXIT ( 7*32+13) /* Fill RSB on VM-Exit */
198#define X86_FEATURE_INTEL_PPIN ( 7*32+14) /* "intel_ppin" Intel Processor Inventory Number */
199#define X86_FEATURE_CDP_L2 ( 7*32+15) /* "cdp_l2" Code and Data Prioritization L2 */
200#define X86_FEATURE_MSR_SPEC_CTRL ( 7*32+16) /* MSR SPEC_CTRL is implemented */
201#define X86_FEATURE_SSBD ( 7*32+17) /* "ssbd" Speculative Store Bypass Disable */
202#define X86_FEATURE_MBA ( 7*32+18) /* "mba" Memory Bandwidth Allocation */
203#define X86_FEATURE_RSB_CTXSW ( 7*32+19) /* Fill RSB on context switches */
204#define X86_FEATURE_PERFMON_V2 ( 7*32+20) /* "perfmon_v2" AMD Performance Monitoring Version 2 */
205#define X86_FEATURE_USE_IBRS_FW ( 7*32+22) /* Use IBRS during runtime firmware calls */
206#define X86_FEATURE_SPEC_STORE_BYPASS_DISABLE ( 7*32+23) /* Disable Speculative Store Bypass. */
207#define X86_FEATURE_LS_CFG_SSBD ( 7*32+24) /* AMD SSBD implementation via LS_CFG MSR */
208#define X86_FEATURE_IBRS ( 7*32+25) /* "ibrs" Indirect Branch Restricted Speculation */
209#define X86_FEATURE_IBPB ( 7*32+26) /* "ibpb" Indirect Branch Prediction Barrier without a guaranteed RSB flush */
210#define X86_FEATURE_STIBP ( 7*32+27) /* "stibp" Single Thread Indirect Branch Predictors */
211#define X86_FEATURE_ZEN ( 7*32+28) /* Generic flag for all Zen and newer */
212#define X86_FEATURE_L1TF_PTEINV ( 7*32+29) /* L1TF workaround PTE inversion */
213#define X86_FEATURE_IBRS_ENHANCED ( 7*32+30) /* "ibrs_enhanced" Enhanced IBRS */
214#define X86_FEATURE_MSR_IA32_FEAT_CTL ( 7*32+31) /* MSR IA32_FEAT_CTL configured */
215
216/* Virtualization flags: Linux defined, word 8 */
217#define X86_FEATURE_TPR_SHADOW ( 8*32+ 0) /* "tpr_shadow" Intel TPR Shadow */
218#define X86_FEATURE_FLEXPRIORITY ( 8*32+ 1) /* "flexpriority" Intel FlexPriority */
219#define X86_FEATURE_EPT ( 8*32+ 2) /* "ept" Intel Extended Page Table */
220#define X86_FEATURE_VPID ( 8*32+ 3) /* "vpid" Intel Virtual Processor ID */
221#define X86_FEATURE_COHERENCY_SFW_NO ( 8*32+ 4) /* SNP cache coherency software work around not needed */
222
223#define X86_FEATURE_VMMCALL ( 8*32+15) /* "vmmcall" Prefer VMMCALL to VMCALL */
224#define X86_FEATURE_XENPV ( 8*32+16) /* Xen paravirtual guest */
225#define X86_FEATURE_EPT_AD ( 8*32+17) /* "ept_ad" Intel Extended Page Table access-dirty bit */
226#define X86_FEATURE_VMCALL ( 8*32+18) /* Hypervisor supports the VMCALL instruction */
227#define X86_FEATURE_VMW_VMMCALL ( 8*32+19) /* VMware prefers VMMCALL hypercall instruction */
228#define X86_FEATURE_PVUNLOCK ( 8*32+20) /* PV unlock function */
229#define X86_FEATURE_VCPUPREEMPT ( 8*32+21) /* PV vcpu_is_preempted function */
230#define X86_FEATURE_TDX_GUEST ( 8*32+22) /* "tdx_guest" Intel Trust Domain Extensions Guest */
231
232/* Intel-defined CPU features, CPUID level 0x00000007:0 (EBX), word 9 */
233#define X86_FEATURE_FSGSBASE ( 9*32+ 0) /* "fsgsbase" RDFSBASE, WRFSBASE, RDGSBASE, WRGSBASE instructions*/
234#define X86_FEATURE_TSC_ADJUST ( 9*32+ 1) /* "tsc_adjust" TSC adjustment MSR 0x3B */
235#define X86_FEATURE_SGX ( 9*32+ 2) /* "sgx" Software Guard Extensions */
236#define X86_FEATURE_BMI1 ( 9*32+ 3) /* "bmi1" 1st group bit manipulation extensions */
237#define X86_FEATURE_HLE ( 9*32+ 4) /* "hle" Hardware Lock Elision */
238#define X86_FEATURE_AVX2 ( 9*32+ 5) /* "avx2" AVX2 instructions */
239#define X86_FEATURE_FDP_EXCPTN_ONLY ( 9*32+ 6) /* FPU data pointer updated only on x87 exceptions */
240#define X86_FEATURE_SMEP ( 9*32+ 7) /* "smep" Supervisor Mode Execution Protection */
241#define X86_FEATURE_BMI2 ( 9*32+ 8) /* "bmi2" 2nd group bit manipulation extensions */
242#define X86_FEATURE_ERMS ( 9*32+ 9) /* "erms" Enhanced REP MOVSB/STOSB instructions */
243#define X86_FEATURE_INVPCID ( 9*32+10) /* "invpcid" Invalidate Processor Context ID */
244#define X86_FEATURE_RTM ( 9*32+11) /* "rtm" Restricted Transactional Memory */
245#define X86_FEATURE_CQM ( 9*32+12) /* "cqm" Cache QoS Monitoring */
246#define X86_FEATURE_ZERO_FCS_FDS ( 9*32+13) /* Zero out FPU CS and FPU DS */
247#define X86_FEATURE_MPX ( 9*32+14) /* "mpx" Memory Protection Extension */
248#define X86_FEATURE_RDT_A ( 9*32+15) /* "rdt_a" Resource Director Technology Allocation */
249#define X86_FEATURE_AVX512F ( 9*32+16) /* "avx512f" AVX-512 Foundation */
250#define X86_FEATURE_AVX512DQ ( 9*32+17) /* "avx512dq" AVX-512 DQ (Double/Quad granular) Instructions */
251#define X86_FEATURE_RDSEED ( 9*32+18) /* "rdseed" RDSEED instruction */
252#define X86_FEATURE_ADX ( 9*32+19) /* "adx" ADCX and ADOX instructions */
253#define X86_FEATURE_SMAP ( 9*32+20) /* "smap" Supervisor Mode Access Prevention */
254#define X86_FEATURE_AVX512IFMA ( 9*32+21) /* "avx512ifma" AVX-512 Integer Fused Multiply-Add instructions */
255#define X86_FEATURE_CLFLUSHOPT ( 9*32+23) /* "clflushopt" CLFLUSHOPT instruction */
256#define X86_FEATURE_CLWB ( 9*32+24) /* "clwb" CLWB instruction */
257#define X86_FEATURE_INTEL_PT ( 9*32+25) /* "intel_pt" Intel Processor Trace */
258#define X86_FEATURE_AVX512PF ( 9*32+26) /* "avx512pf" AVX-512 Prefetch */
259#define X86_FEATURE_AVX512ER ( 9*32+27) /* "avx512er" AVX-512 Exponential and Reciprocal */
260#define X86_FEATURE_AVX512CD ( 9*32+28) /* "avx512cd" AVX-512 Conflict Detection */
261#define X86_FEATURE_SHA_NI ( 9*32+29) /* "sha_ni" SHA1/SHA256 Instruction Extensions */
262#define X86_FEATURE_AVX512BW ( 9*32+30) /* "avx512bw" AVX-512 BW (Byte/Word granular) Instructions */
263#define X86_FEATURE_AVX512VL ( 9*32+31) /* "avx512vl" AVX-512 VL (128/256 Vector Length) Extensions */
264
265/* Extended state features, CPUID level 0x0000000d:1 (EAX), word 10 */
266#define X86_FEATURE_XSAVEOPT (10*32+ 0) /* "xsaveopt" XSAVEOPT instruction */
267#define X86_FEATURE_XSAVEC (10*32+ 1) /* "xsavec" XSAVEC instruction */
268#define X86_FEATURE_XGETBV1 (10*32+ 2) /* "xgetbv1" XGETBV with ECX = 1 instruction */
269#define X86_FEATURE_XSAVES (10*32+ 3) /* "xsaves" XSAVES/XRSTORS instructions */
270#define X86_FEATURE_XFD (10*32+ 4) /* eXtended Feature Disabling */
271
272/*
273 * Extended auxiliary flags: Linux defined - for features scattered in various
274 * CPUID levels like 0xf, etc.
275 *
276 * Reuse free bits when adding new feature flags!
277 */
278#define X86_FEATURE_CQM_LLC (11*32+ 0) /* "cqm_llc" LLC QoS if 1 */
279#define X86_FEATURE_CQM_OCCUP_LLC (11*32+ 1) /* "cqm_occup_llc" LLC occupancy monitoring */
280#define X86_FEATURE_CQM_MBM_TOTAL (11*32+ 2) /* "cqm_mbm_total" LLC Total MBM monitoring */
281#define X86_FEATURE_CQM_MBM_LOCAL (11*32+ 3) /* "cqm_mbm_local" LLC Local MBM monitoring */
282#define X86_FEATURE_FENCE_SWAPGS_USER (11*32+ 4) /* LFENCE in user entry SWAPGS path */
283#define X86_FEATURE_FENCE_SWAPGS_KERNEL (11*32+ 5) /* LFENCE in kernel entry SWAPGS path */
284#define X86_FEATURE_SPLIT_LOCK_DETECT (11*32+ 6) /* "split_lock_detect" #AC for split lock */
285#define X86_FEATURE_PER_THREAD_MBA (11*32+ 7) /* Per-thread Memory Bandwidth Allocation */
286#define X86_FEATURE_SGX1 (11*32+ 8) /* Basic SGX */
287#define X86_FEATURE_SGX2 (11*32+ 9) /* SGX Enclave Dynamic Memory Management (EDMM) */
288#define X86_FEATURE_ENTRY_IBPB (11*32+10) /* Issue an IBPB on kernel entry */
289#define X86_FEATURE_RRSBA_CTRL (11*32+11) /* RET prediction control */
290#define X86_FEATURE_RETPOLINE (11*32+12) /* Generic Retpoline mitigation for Spectre variant 2 */
291#define X86_FEATURE_RETPOLINE_LFENCE (11*32+13) /* Use LFENCE for Spectre variant 2 */
292#define X86_FEATURE_RETHUNK (11*32+14) /* Use REturn THUNK */
293#define X86_FEATURE_UNRET (11*32+15) /* AMD BTB untrain return */
294#define X86_FEATURE_USE_IBPB_FW (11*32+16) /* Use IBPB during runtime firmware calls */
295#define X86_FEATURE_RSB_VMEXIT_LITE (11*32+17) /* Fill RSB on VM exit when EIBRS is enabled */
296#define X86_FEATURE_SGX_EDECCSSA (11*32+18) /* SGX EDECCSSA user leaf function */
297#define X86_FEATURE_CALL_DEPTH (11*32+19) /* Call depth tracking for RSB stuffing */
298#define X86_FEATURE_MSR_TSX_CTRL (11*32+20) /* MSR IA32_TSX_CTRL (Intel) implemented */
299#define X86_FEATURE_SMBA (11*32+21) /* Slow Memory Bandwidth Allocation */
300#define X86_FEATURE_BMEC (11*32+22) /* Bandwidth Monitoring Event Configuration */
301#define X86_FEATURE_USER_SHSTK (11*32+23) /* "user_shstk" Shadow stack support for user mode applications */
302#define X86_FEATURE_SRSO (11*32+24) /* AMD BTB untrain RETs */
303#define X86_FEATURE_SRSO_ALIAS (11*32+25) /* AMD BTB untrain RETs through aliasing */
304#define X86_FEATURE_IBPB_ON_VMEXIT (11*32+26) /* Issue an IBPB only on VMEXIT */
305#define X86_FEATURE_APIC_MSRS_FENCE (11*32+27) /* IA32_TSC_DEADLINE and X2APIC MSRs need fencing */
306#define X86_FEATURE_ZEN2 (11*32+28) /* CPU based on Zen2 microarchitecture */
307#define X86_FEATURE_ZEN3 (11*32+29) /* CPU based on Zen3 microarchitecture */
308#define X86_FEATURE_ZEN4 (11*32+30) /* CPU based on Zen4 microarchitecture */
309#define X86_FEATURE_ZEN1 (11*32+31) /* CPU based on Zen1 microarchitecture */
310
311/* Intel-defined CPU features, CPUID level 0x00000007:1 (EAX), word 12 */
312#define X86_FEATURE_SHA512 (12*32+ 0) /* SHA512 instructions */
313#define X86_FEATURE_SM3 (12*32+ 1) /* SM3 instructions */
314#define X86_FEATURE_SM4 (12*32+ 2) /* SM4 instructions */
315#define X86_FEATURE_AVX_VNNI (12*32+ 4) /* "avx_vnni" AVX VNNI instructions */
316#define X86_FEATURE_AVX512_BF16 (12*32+ 5) /* "avx512_bf16" AVX512 BFLOAT16 instructions */
317#define X86_FEATURE_CMPCCXADD (12*32+ 7) /* CMPccXADD instructions */
318#define X86_FEATURE_ARCH_PERFMON_EXT (12*32+ 8) /* Intel Architectural PerfMon Extension */
319#define X86_FEATURE_FZRM (12*32+10) /* Fast zero-length REP MOVSB */
320#define X86_FEATURE_FSRS (12*32+11) /* Fast short REP STOSB */
321#define X86_FEATURE_FSRC (12*32+12) /* Fast short REP {CMPSB,SCASB} */
322#define X86_FEATURE_FRED (12*32+17) /* "fred" Flexible Return and Event Delivery */
323#define X86_FEATURE_LKGS (12*32+18) /* Load "kernel" (userspace) GS */
324#define X86_FEATURE_WRMSRNS (12*32+19) /* Non-serializing WRMSR */
325#define X86_FEATURE_AMX_FP16 (12*32+21) /* AMX fp16 Support */
326#define X86_FEATURE_AVX_IFMA (12*32+23) /* Support for VPMADD52[H,L]UQ */
327#define X86_FEATURE_LAM (12*32+26) /* "lam" Linear Address Masking */
328
329/* AMD-defined CPU features, CPUID level 0x80000008 (EBX), word 13 */
330#define X86_FEATURE_CLZERO (13*32+ 0) /* "clzero" CLZERO instruction */
331#define X86_FEATURE_IRPERF (13*32+ 1) /* "irperf" Instructions Retired Count */
332#define X86_FEATURE_XSAVEERPTR (13*32+ 2) /* "xsaveerptr" Always save/restore FP error pointers */
333#define X86_FEATURE_INVLPGB (13*32+ 3) /* INVLPGB and TLBSYNC instructions supported */
334#define X86_FEATURE_RDPRU (13*32+ 4) /* "rdpru" Read processor register at user level */
335#define X86_FEATURE_WBNOINVD (13*32+ 9) /* "wbnoinvd" WBNOINVD instruction */
336#define X86_FEATURE_AMD_IBPB (13*32+12) /* Indirect Branch Prediction Barrier */
337#define X86_FEATURE_AMD_IBRS (13*32+14) /* Indirect Branch Restricted Speculation */
338#define X86_FEATURE_AMD_STIBP (13*32+15) /* Single Thread Indirect Branch Predictors */
339#define X86_FEATURE_AMD_STIBP_ALWAYS_ON (13*32+17) /* Single Thread Indirect Branch Predictors always-on preferred */
340#define X86_FEATURE_AMD_IBRS_SAME_MODE (13*32+19) /* Indirect Branch Restricted Speculation same mode protection*/
341#define X86_FEATURE_AMD_PPIN (13*32+23) /* "amd_ppin" Protected Processor Inventory Number */
342#define X86_FEATURE_AMD_SSBD (13*32+24) /* Speculative Store Bypass Disable */
343#define X86_FEATURE_VIRT_SSBD (13*32+25) /* "virt_ssbd" Virtualized Speculative Store Bypass Disable */
344#define X86_FEATURE_AMD_SSB_NO (13*32+26) /* Speculative Store Bypass is fixed in hardware. */
345#define X86_FEATURE_CPPC (13*32+27) /* "cppc" Collaborative Processor Performance Control */
346#define X86_FEATURE_AMD_PSFD (13*32+28) /* Predictive Store Forwarding Disable */
347#define X86_FEATURE_BTC_NO (13*32+29) /* Not vulnerable to Branch Type Confusion */
348#define X86_FEATURE_AMD_IBPB_RET (13*32+30) /* IBPB clears return address predictor */
349#define X86_FEATURE_BRS (13*32+31) /* "brs" Branch Sampling available */
350
351/* Thermal and Power Management Leaf, CPUID level 0x00000006 (EAX), word 14 */
352#define X86_FEATURE_DTHERM (14*32+ 0) /* "dtherm" Digital Thermal Sensor */
353#define X86_FEATURE_IDA (14*32+ 1) /* "ida" Intel Dynamic Acceleration */
354#define X86_FEATURE_ARAT (14*32+ 2) /* "arat" Always Running APIC Timer */
355#define X86_FEATURE_PLN (14*32+ 4) /* "pln" Intel Power Limit Notification */
356#define X86_FEATURE_PTS (14*32+ 6) /* "pts" Intel Package Thermal Status */
357#define X86_FEATURE_HWP (14*32+ 7) /* "hwp" Intel Hardware P-states */
358#define X86_FEATURE_HWP_NOTIFY (14*32+ 8) /* "hwp_notify" HWP Notification */
359#define X86_FEATURE_HWP_ACT_WINDOW (14*32+ 9) /* "hwp_act_window" HWP Activity Window */
360#define X86_FEATURE_HWP_EPP (14*32+10) /* "hwp_epp" HWP Energy Perf. Preference */
361#define X86_FEATURE_HWP_PKG_REQ (14*32+11) /* "hwp_pkg_req" HWP Package Level Request */
362#define X86_FEATURE_HWP_HIGHEST_PERF_CHANGE (14*32+15) /* HWP Highest perf change */
363#define X86_FEATURE_HFI (14*32+19) /* "hfi" Hardware Feedback Interface */
364
365/* AMD SVM Feature Identification, CPUID level 0x8000000a (EDX), word 15 */
366#define X86_FEATURE_NPT (15*32+ 0) /* "npt" Nested Page Table support */
367#define X86_FEATURE_LBRV (15*32+ 1) /* "lbrv" LBR Virtualization support */
368#define X86_FEATURE_SVML (15*32+ 2) /* "svm_lock" SVM locking MSR */
369#define X86_FEATURE_NRIPS (15*32+ 3) /* "nrip_save" SVM next_rip save */
370#define X86_FEATURE_TSCRATEMSR (15*32+ 4) /* "tsc_scale" TSC scaling support */
371#define X86_FEATURE_VMCBCLEAN (15*32+ 5) /* "vmcb_clean" VMCB clean bits support */
372#define X86_FEATURE_FLUSHBYASID (15*32+ 6) /* "flushbyasid" Flush-by-ASID support */
373#define X86_FEATURE_DECODEASSISTS (15*32+ 7) /* "decodeassists" Decode Assists support */
374#define X86_FEATURE_PAUSEFILTER (15*32+10) /* "pausefilter" Filtered pause intercept */
375#define X86_FEATURE_PFTHRESHOLD (15*32+12) /* "pfthreshold" Pause filter threshold */
376#define X86_FEATURE_AVIC (15*32+13) /* "avic" Virtual Interrupt Controller */
377#define X86_FEATURE_V_VMSAVE_VMLOAD (15*32+15) /* "v_vmsave_vmload" Virtual VMSAVE VMLOAD */
378#define X86_FEATURE_VGIF (15*32+16) /* "vgif" Virtual GIF */
379#define X86_FEATURE_X2AVIC (15*32+18) /* "x2avic" Virtual x2apic */
380#define X86_FEATURE_V_SPEC_CTRL (15*32+20) /* "v_spec_ctrl" Virtual SPEC_CTRL */
381#define X86_FEATURE_VNMI (15*32+25) /* "vnmi" Virtual NMI */
382#define X86_FEATURE_SVME_ADDR_CHK (15*32+28) /* SVME addr check */
383#define X86_FEATURE_BUS_LOCK_THRESHOLD (15*32+29) /* Bus lock threshold */
384#define X86_FEATURE_IDLE_HLT (15*32+30) /* IDLE HLT intercept */
385
386/* Intel-defined CPU features, CPUID level 0x00000007:0 (ECX), word 16 */
387#define X86_FEATURE_AVX512VBMI (16*32+ 1) /* "avx512vbmi" AVX512 Vector Bit Manipulation instructions*/
388#define X86_FEATURE_UMIP (16*32+ 2) /* "umip" User Mode Instruction Protection */
389#define X86_FEATURE_PKU (16*32+ 3) /* "pku" Protection Keys for Userspace */
390#define X86_FEATURE_OSPKE (16*32+ 4) /* "ospke" OS Protection Keys Enable */
391#define X86_FEATURE_WAITPKG (16*32+ 5) /* "waitpkg" UMONITOR/UMWAIT/TPAUSE Instructions */
392#define X86_FEATURE_AVX512_VBMI2 (16*32+ 6) /* "avx512_vbmi2" Additional AVX512 Vector Bit Manipulation Instructions */
393#define X86_FEATURE_SHSTK (16*32+ 7) /* Shadow stack */
394#define X86_FEATURE_GFNI (16*32+ 8) /* "gfni" Galois Field New Instructions */
395#define X86_FEATURE_VAES (16*32+ 9) /* "vaes" Vector AES */
396#define X86_FEATURE_VPCLMULQDQ (16*32+10) /* "vpclmulqdq" Carry-Less Multiplication Double Quadword */
397#define X86_FEATURE_AVX512_VNNI (16*32+11) /* "avx512_vnni" Vector Neural Network Instructions */
398#define X86_FEATURE_AVX512_BITALG (16*32+12) /* "avx512_bitalg" Support for VPOPCNT[B,W] and VPSHUF-BITQMB instructions */
399#define X86_FEATURE_TME (16*32+13) /* "tme" Intel Total Memory Encryption */
400#define X86_FEATURE_AVX512_VPOPCNTDQ (16*32+14) /* "avx512_vpopcntdq" POPCNT for vectors of DW/QW */
401#define X86_FEATURE_LA57 (16*32+16) /* "la57" 5-level page tables */
402#define X86_FEATURE_RDPID (16*32+22) /* "rdpid" RDPID instruction */
403#define X86_FEATURE_BUS_LOCK_DETECT (16*32+24) /* "bus_lock_detect" Bus Lock detect */
404#define X86_FEATURE_CLDEMOTE (16*32+25) /* "cldemote" CLDEMOTE instruction */
405#define X86_FEATURE_MOVDIRI (16*32+27) /* "movdiri" MOVDIRI instruction */
406#define X86_FEATURE_MOVDIR64B (16*32+28) /* "movdir64b" MOVDIR64B instruction */
407#define X86_FEATURE_ENQCMD (16*32+29) /* "enqcmd" ENQCMD and ENQCMDS instructions */
408#define X86_FEATURE_SGX_LC (16*32+30) /* "sgx_lc" Software Guard Extensions Launch Control */
409
410/* AMD-defined CPU features, CPUID level 0x80000007 (EBX), word 17 */
411#define X86_FEATURE_OVERFLOW_RECOV (17*32+ 0) /* "overflow_recov" MCA overflow recovery support */
412#define X86_FEATURE_SUCCOR (17*32+ 1) /* "succor" Uncorrectable error containment and recovery */
413#define X86_FEATURE_SMCA (17*32+ 3) /* "smca" Scalable MCA */
414
415/* Intel-defined CPU features, CPUID level 0x00000007:0 (EDX), word 18 */
416#define X86_FEATURE_AVX512_4VNNIW (18*32+ 2) /* "avx512_4vnniw" AVX-512 Neural Network Instructions */
417#define X86_FEATURE_AVX512_4FMAPS (18*32+ 3) /* "avx512_4fmaps" AVX-512 Multiply Accumulation Single precision */
418#define X86_FEATURE_FSRM (18*32+ 4) /* "fsrm" Fast Short Rep Mov */
419#define X86_FEATURE_AVX512_VP2INTERSECT (18*32+ 8) /* "avx512_vp2intersect" AVX-512 Intersect for D/Q */
420#define X86_FEATURE_SRBDS_CTRL (18*32+ 9) /* SRBDS mitigation MSR available */
421#define X86_FEATURE_MD_CLEAR (18*32+10) /* "md_clear" VERW clears CPU buffers */
422#define X86_FEATURE_RTM_ALWAYS_ABORT (18*32+11) /* RTM transaction always aborts */
423#define X86_FEATURE_TSX_FORCE_ABORT (18*32+13) /* TSX_FORCE_ABORT */
424#define X86_FEATURE_SERIALIZE (18*32+14) /* "serialize" SERIALIZE instruction */
425#define X86_FEATURE_HYBRID_CPU (18*32+15) /* This part has CPUs of more than one type */
426#define X86_FEATURE_TSXLDTRK (18*32+16) /* "tsxldtrk" TSX Suspend Load Address Tracking */
427#define X86_FEATURE_PCONFIG (18*32+18) /* "pconfig" Intel PCONFIG */
428#define X86_FEATURE_ARCH_LBR (18*32+19) /* "arch_lbr" Intel ARCH LBR */
429#define X86_FEATURE_IBT (18*32+20) /* "ibt" Indirect Branch Tracking */
430#define X86_FEATURE_AMX_BF16 (18*32+22) /* "amx_bf16" AMX bf16 Support */
431#define X86_FEATURE_AVX512_FP16 (18*32+23) /* "avx512_fp16" AVX512 FP16 */
432#define X86_FEATURE_AMX_TILE (18*32+24) /* "amx_tile" AMX tile Support */
433#define X86_FEATURE_AMX_INT8 (18*32+25) /* "amx_int8" AMX int8 Support */
434#define X86_FEATURE_SPEC_CTRL (18*32+26) /* Speculation Control (IBRS + IBPB) */
435#define X86_FEATURE_INTEL_STIBP (18*32+27) /* Single Thread Indirect Branch Predictors */
436#define X86_FEATURE_FLUSH_L1D (18*32+28) /* "flush_l1d" Flush L1D cache */
437#define X86_FEATURE_ARCH_CAPABILITIES (18*32+29) /* "arch_capabilities" IA32_ARCH_CAPABILITIES MSR (Intel) */
438#define X86_FEATURE_CORE_CAPABILITIES (18*32+30) /* IA32_CORE_CAPABILITIES MSR */
439#define X86_FEATURE_SPEC_CTRL_SSBD (18*32+31) /* Speculative Store Bypass Disable */
440
441/* AMD-defined memory encryption features, CPUID level 0x8000001f (EAX), word 19 */
442#define X86_FEATURE_SME (19*32+ 0) /* "sme" Secure Memory Encryption */
443#define X86_FEATURE_SEV (19*32+ 1) /* "sev" Secure Encrypted Virtualization */
444#define X86_FEATURE_VM_PAGE_FLUSH (19*32+ 2) /* VM Page Flush MSR is supported */
445#define X86_FEATURE_SEV_ES (19*32+ 3) /* "sev_es" Secure Encrypted Virtualization - Encrypted State */
446#define X86_FEATURE_SEV_SNP (19*32+ 4) /* "sev_snp" Secure Encrypted Virtualization - Secure Nested Paging */
447#define X86_FEATURE_SNP_SECURE_TSC (19*32+ 8) /* SEV-SNP Secure TSC */
448#define X86_FEATURE_V_TSC_AUX (19*32+ 9) /* Virtual TSC_AUX */
449#define X86_FEATURE_SME_COHERENT (19*32+10) /* hardware-enforced cache coherency */
450#define X86_FEATURE_DEBUG_SWAP (19*32+14) /* "debug_swap" SEV-ES full debug state swap support */
451#define X86_FEATURE_RMPREAD (19*32+21) /* RMPREAD instruction */
452#define X86_FEATURE_SEGMENTED_RMP (19*32+23) /* Segmented RMP support */
453#define X86_FEATURE_ALLOWED_SEV_FEATURES (19*32+27) /* Allowed SEV Features */
454#define X86_FEATURE_SVSM (19*32+28) /* "svsm" SVSM present */
455#define X86_FEATURE_HV_INUSE_WR_ALLOWED (19*32+30) /* Allow Write to in-use hypervisor-owned pages */
456
457/* AMD-defined Extended Feature 2 EAX, CPUID level 0x80000021 (EAX), word 20 */
458#define X86_FEATURE_NO_NESTED_DATA_BP (20*32+ 0) /* No Nested Data Breakpoints */
459#define X86_FEATURE_WRMSR_XX_BASE_NS (20*32+ 1) /* WRMSR to {FS,GS,KERNEL_GS}_BASE is non-serializing */
460#define X86_FEATURE_LFENCE_RDTSC (20*32+ 2) /* LFENCE always serializing / synchronizes RDTSC */
461#define X86_FEATURE_VERW_CLEAR (20*32+ 5) /* The memory form of VERW mitigates TSA */
462#define X86_FEATURE_NULL_SEL_CLR_BASE (20*32+ 6) /* Null Selector Clears Base */
463
464#define X86_FEATURE_AUTOIBRS (20*32+ 8) /* Automatic IBRS */
465#define X86_FEATURE_NO_SMM_CTL_MSR (20*32+ 9) /* SMM_CTL MSR is not present */
466
467#define X86_FEATURE_GP_ON_USER_CPUID (20*32+17) /* User CPUID faulting */
468
469#define X86_FEATURE_PREFETCHI (20*32+20) /* Prefetch Data/Instruction to Cache Level */
470#define X86_FEATURE_SBPB (20*32+27) /* Selective Branch Prediction Barrier */
471#define X86_FEATURE_IBPB_BRTYPE (20*32+28) /* MSR_PRED_CMD[IBPB] flushes all branch type predictions */
472#define X86_FEATURE_SRSO_NO (20*32+29) /* CPU is not affected by SRSO */
473#define X86_FEATURE_SRSO_USER_KERNEL_NO (20*32+30) /* CPU is not affected by SRSO across user/kernel boundaries */
474#define X86_FEATURE_SRSO_BP_SPEC_REDUCE (20*32+31) /*
475 * BP_CFG[BpSpecReduce] can be used to mitigate SRSO for VMs.
476 * (SRSO_MSR_FIX in the official doc).
477 */
478
479/*
480 * Extended auxiliary flags: Linux defined - for features scattered in various
481 * CPUID levels like 0x80000022, etc and Linux defined features.
482 *
483 * Reuse free bits when adding new feature flags!
484 */
485#define X86_FEATURE_AMD_LBR_PMC_FREEZE (21*32+ 0) /* "amd_lbr_pmc_freeze" AMD LBR and PMC Freeze */
486#define X86_FEATURE_CLEAR_BHB_LOOP (21*32+ 1) /* Clear branch history at syscall entry using SW loop */
487#define X86_FEATURE_BHI_CTRL (21*32+ 2) /* BHI_DIS_S HW control available */
488#define X86_FEATURE_CLEAR_BHB_HW (21*32+ 3) /* BHI_DIS_S HW control enabled */
489#define X86_FEATURE_CLEAR_BHB_VMEXIT (21*32+ 4) /* Clear branch history at vmexit using SW loop */
490#define X86_FEATURE_AMD_FAST_CPPC (21*32+ 5) /* Fast CPPC */
491#define X86_FEATURE_AMD_HTR_CORES (21*32+ 6) /* Heterogeneous Core Topology */
492#define X86_FEATURE_AMD_WORKLOAD_CLASS (21*32+ 7) /* Workload Classification */
493#define X86_FEATURE_PREFER_YMM (21*32+ 8) /* Avoid ZMM registers due to downclocking */
494#define X86_FEATURE_APX (21*32+ 9) /* Advanced Performance Extensions */
495#define X86_FEATURE_INDIRECT_THUNK_ITS (21*32+10) /* Use thunk for indirect branches in lower half of cacheline */
496#define X86_FEATURE_TSA_SQ_NO (21*32+11) /* AMD CPU not vulnerable to TSA-SQ */
497#define X86_FEATURE_TSA_L1_NO (21*32+12) /* AMD CPU not vulnerable to TSA-L1 */
498#define X86_FEATURE_CLEAR_CPU_BUF_VM (21*32+13) /* Clear CPU buffers using VERW before VMRUN */
499#define X86_FEATURE_IBPB_EXIT_TO_USER (21*32+14) /* Use IBPB on exit-to-userspace, see VMSCAPE bug */
500#define X86_FEATURE_ABMC (21*32+15) /* Assignable Bandwidth Monitoring Counters */
501#define X86_FEATURE_MSR_IMM (21*32+16) /* MSR immediate form instructions */
502
503/*
504 * BUG word(s)
505 */
506#define X86_BUG(x) (NCAPINTS*32 + (x))
507
508#define X86_BUG_F00F X86_BUG(0) /* "f00f" Intel F00F */
509#define X86_BUG_FDIV X86_BUG(1) /* "fdiv" FPU FDIV */
510#define X86_BUG_COMA X86_BUG(2) /* "coma" Cyrix 6x86 coma */
511#define X86_BUG_AMD_TLB_MMATCH X86_BUG(3) /* "tlb_mmatch" AMD Erratum 383 */
512#define X86_BUG_AMD_APIC_C1E X86_BUG(4) /* "apic_c1e" AMD Erratum 400 */
513#define X86_BUG_11AP X86_BUG(5) /* "11ap" Bad local APIC aka 11AP */
514#define X86_BUG_FXSAVE_LEAK X86_BUG(6) /* "fxsave_leak" FXSAVE leaks FOP/FIP/FOP */
515#define X86_BUG_CLFLUSH_MONITOR X86_BUG(7) /* "clflush_monitor" AAI65, CLFLUSH required before MONITOR */
516#define X86_BUG_SYSRET_SS_ATTRS X86_BUG(8) /* "sysret_ss_attrs" SYSRET doesn't fix up SS attrs */
517#ifdef CONFIG_X86_32
518/*
519 * 64-bit kernels don't use X86_BUG_ESPFIX. Make the define conditional
520 * to avoid confusion.
521 */
522#define X86_BUG_ESPFIX X86_BUG(9) /* IRET to 16-bit SS corrupts ESP/RSP high bits */
523#endif
524#define X86_BUG_NULL_SEG X86_BUG(10) /* "null_seg" Nulling a selector preserves the base */
525#define X86_BUG_SWAPGS_FENCE X86_BUG(11) /* "swapgs_fence" SWAPGS without input dep on GS */
526#define X86_BUG_MONITOR X86_BUG(12) /* "monitor" IPI required to wake up remote CPU */
527#define X86_BUG_AMD_E400 X86_BUG(13) /* "amd_e400" CPU is among the affected by Erratum 400 */
528#define X86_BUG_CPU_MELTDOWN X86_BUG(14) /* "cpu_meltdown" CPU is affected by meltdown attack and needs kernel page table isolation */
529#define X86_BUG_SPECTRE_V1 X86_BUG(15) /* "spectre_v1" CPU is affected by Spectre variant 1 attack with conditional branches */
530#define X86_BUG_SPECTRE_V2 X86_BUG(16) /* "spectre_v2" CPU is affected by Spectre variant 2 attack with indirect branches */
531#define X86_BUG_SPEC_STORE_BYPASS X86_BUG(17) /* "spec_store_bypass" CPU is affected by speculative store bypass attack */
532#define X86_BUG_L1TF X86_BUG(18) /* "l1tf" CPU is affected by L1 Terminal Fault */
533#define X86_BUG_MDS X86_BUG(19) /* "mds" CPU is affected by Microarchitectural data sampling */
534#define X86_BUG_MSBDS_ONLY X86_BUG(20) /* "msbds_only" CPU is only affected by the MSDBS variant of BUG_MDS */
535#define X86_BUG_SWAPGS X86_BUG(21) /* "swapgs" CPU is affected by speculation through SWAPGS */
536#define X86_BUG_TAA X86_BUG(22) /* "taa" CPU is affected by TSX Async Abort(TAA) */
537#define X86_BUG_ITLB_MULTIHIT X86_BUG(23) /* "itlb_multihit" CPU may incur MCE during certain page attribute changes */
538#define X86_BUG_SRBDS X86_BUG(24) /* "srbds" CPU may leak RNG bits if not mitigated */
539#define X86_BUG_MMIO_STALE_DATA X86_BUG(25) /* "mmio_stale_data" CPU is affected by Processor MMIO Stale Data vulnerabilities */
540/* unused, was #define X86_BUG_MMIO_UNKNOWN X86_BUG(26) "mmio_unknown" CPU is too old and its MMIO Stale Data status is unknown */
541#define X86_BUG_RETBLEED X86_BUG(27) /* "retbleed" CPU is affected by RETBleed */
542#define X86_BUG_EIBRS_PBRSB X86_BUG(28) /* "eibrs_pbrsb" EIBRS is vulnerable to Post Barrier RSB Predictions */
543#define X86_BUG_SMT_RSB X86_BUG(29) /* "smt_rsb" CPU is vulnerable to Cross-Thread Return Address Predictions */
544#define X86_BUG_GDS X86_BUG(30) /* "gds" CPU is affected by Gather Data Sampling */
545#define X86_BUG_TDX_PW_MCE X86_BUG(31) /* "tdx_pw_mce" CPU may incur #MC if non-TD software does partial write to TDX private memory */
546
547/* BUG word 2 */
548#define X86_BUG_SRSO X86_BUG( 1*32+ 0) /* "srso" AMD SRSO bug */
549#define X86_BUG_DIV0 X86_BUG( 1*32+ 1) /* "div0" AMD DIV0 speculation bug */
550#define X86_BUG_RFDS X86_BUG( 1*32+ 2) /* "rfds" CPU is vulnerable to Register File Data Sampling */
551#define X86_BUG_BHI X86_BUG( 1*32+ 3) /* "bhi" CPU is affected by Branch History Injection */
552#define X86_BUG_IBPB_NO_RET X86_BUG( 1*32+ 4) /* "ibpb_no_ret" IBPB omits return target predictions */
553#define X86_BUG_SPECTRE_V2_USER X86_BUG( 1*32+ 5) /* "spectre_v2_user" CPU is affected by Spectre variant 2 attack between user processes */
554#define X86_BUG_OLD_MICROCODE X86_BUG( 1*32+ 6) /* "old_microcode" CPU has old microcode, it is surely vulnerable to something */
555#define X86_BUG_ITS X86_BUG( 1*32+ 7) /* "its" CPU is affected by Indirect Target Selection */
556#define X86_BUG_ITS_NATIVE_ONLY X86_BUG( 1*32+ 8) /* "its_native_only" CPU is affected by ITS, VMX is not affected */
557#define X86_BUG_TSA X86_BUG( 1*32+ 9) /* "tsa" CPU is affected by Transient Scheduler Attacks */
558#define X86_BUG_VMSCAPE X86_BUG( 1*32+10) /* "vmscape" CPU is affected by VMSCAPE attacks from guests */
559#endif /* _ASM_X86_CPUFEATURES_H */
560