arch/x86/include/asm/cpufeature.h

   1 /*
   2  * Defines x86 CPU feature bits
   3  */
   4 #ifndef _ASM_X86_CPUFEATURE_H
   5 #define _ASM_X86_CPUFEATURE_H
   6
   7 #ifndef _ASM_X86_REQUIRED_FEATURES_H
   8 #include <asm/required-features.h>
   9 #endif
  10
  11 #ifndef _ASM_X86_DISABLED_FEATURES_H
  12 #include <asm/disabled-features.h>
  13 #endif
  14
  15 #define NCAPINTS        13      /* N 32-bit words worth of info */
  16 #define NBUGINTS        1       /* N 32-bit bug flags */
  17
  18 /*
  19  * Note: If the comment begins with a quoted string, that string is used
  20  * in /proc/cpuinfo instead of the macro name.  If the string is "",
  21  * this feature bit is not displayed in /proc/cpuinfo at all.
  22  */
  23
  24 /* Intel-defined CPU features, CPUID level 0x00000001 (edx), word 0 */
  25 #define X86_FEATURE_FPU         ( 0*32+ 0) /* Onboard FPU */
  26 #define X86_FEATURE_VME         ( 0*32+ 1) /* Virtual Mode Extensions */
  27 #define X86_FEATURE_DE          ( 0*32+ 2) /* Debugging Extensions */
  28 #define X86_FEATURE_PSE         ( 0*32+ 3) /* Page Size Extensions */
  29 #define X86_FEATURE_TSC         ( 0*32+ 4) /* Time Stamp Counter */
  30 #define X86_FEATURE_MSR         ( 0*32+ 5) /* Model-Specific Registers */
  31 #define X86_FEATURE_PAE         ( 0*32+ 6) /* Physical Address Extensions */
  32 #define X86_FEATURE_MCE         ( 0*32+ 7) /* Machine Check Exception */
  33 #define X86_FEATURE_CX8         ( 0*32+ 8) /* CMPXCHG8 instruction */
  34 #define X86_FEATURE_APIC        ( 0*32+ 9) /* Onboard APIC */
  35 #define X86_FEATURE_SEP         ( 0*32+11) /* SYSENTER/SYSEXIT */
  36 #define X86_FEATURE_MTRR        ( 0*32+12) /* Memory Type Range Registers */
  37 #define X86_FEATURE_PGE         ( 0*32+13) /* Page Global Enable */
  38 #define X86_FEATURE_MCA         ( 0*32+14) /* Machine Check Architecture */
  39 #define X86_FEATURE_CMOV        ( 0*32+15) /* CMOV instructions */
  40                                           /* (plus FCMOVcc, FCOMI with FPU) */
  41 #define X86_FEATURE_PAT         ( 0*32+16) /* Page Attribute Table */
  42 #define X86_FEATURE_PSE36       ( 0*32+17) /* 36-bit PSEs */
  43 #define X86_FEATURE_PN          ( 0*32+18) /* Processor serial number */
  44 #define X86_FEATURE_CLFLUSH     ( 0*32+19) /* CLFLUSH instruction */
  45 #define X86_FEATURE_DS          ( 0*32+21) /* "dts" Debug Store */
  46 #define X86_FEATURE_ACPI        ( 0*32+22) /* ACPI via MSR */
  47 #define X86_FEATURE_MMX         ( 0*32+23) /* Multimedia Extensions */
  48 #define X86_FEATURE_FXSR        ( 0*32+24) /* FXSAVE/FXRSTOR, CR4.OSFXSR */
  49 #define X86_FEATURE_XMM         ( 0*32+25) /* "sse" */
  50 #define X86_FEATURE_XMM2        ( 0*32+26) /* "sse2" */
  51 #define X86_FEATURE_SELFSNOOP   ( 0*32+27) /* "ss" CPU self snoop */
  52 #define X86_FEATURE_HT          ( 0*32+28) /* Hyper-Threading */
  53 #define X86_FEATURE_ACC         ( 0*32+29) /* "tm" Automatic clock control */
  54 #define X86_FEATURE_IA64        ( 0*32+30) /* IA-64 processor */
  55 #define X86_FEATURE_PBE         ( 0*32+31) /* Pending Break Enable */
  56
  57 /* AMD-defined CPU features, CPUID level 0x80000001, word 1 */
  58 /* Don't duplicate feature flags which are redundant with Intel! */
  59 #define X86_FEATURE_SYSCALL     ( 1*32+11) /* SYSCALL/SYSRET */
  60 #define X86_FEATURE_MP          ( 1*32+19) /* MP Capable. */
  61 #define X86_FEATURE_NX          ( 1*32+20) /* Execute Disable */
  62 #define X86_FEATURE_MMXEXT      ( 1*32+22) /* AMD MMX extensions */
  63 #define X86_FEATURE_FXSR_OPT    ( 1*32+25) /* FXSAVE/FXRSTOR optimizations */
  64 #define X86_FEATURE_GBPAGES     ( 1*32+26) /* "pdpe1gb" GB pages */
  65 #define X86_FEATURE_RDTSCP      ( 1*32+27) /* RDTSCP */
  66 #define X86_FEATURE_LM          ( 1*32+29) /* Long Mode (x86-64) */
  67 #define X86_FEATURE_3DNOWEXT    ( 1*32+30) /* AMD 3DNow! extensions */
  68 #define X86_FEATURE_3DNOW       ( 1*32+31) /* 3DNow! */
  69
  70 /* Transmeta-defined CPU features, CPUID level 0x80860001, word 2 */
  71 #define X86_FEATURE_RECOVERY    ( 2*32+ 0) /* CPU in recovery mode */
  72 #define X86_FEATURE_LONGRUN     ( 2*32+ 1) /* Longrun power control */
  73 #define X86_FEATURE_LRTI        ( 2*32+ 3) /* LongRun table interface */
  74
  75 /* Other features, Linux-defined mapping, word 3 */
  76 /* This range is used for feature bits which conflict or are synthesized */
  77 #define X86_FEATURE_CXMMX       ( 3*32+ 0) /* Cyrix MMX extensions */
  78 #define X86_FEATURE_K6_MTRR     ( 3*32+ 1) /* AMD K6 nonstandard MTRRs */
  79 #define X86_FEATURE_CYRIX_ARR   ( 3*32+ 2) /* Cyrix ARRs (= MTRRs) */
  80 #define X86_FEATURE_CENTAUR_MCR ( 3*32+ 3) /* Centaur MCRs (= MTRRs) */
  81 /* cpu types for specific tunings: */
  82 #define X86_FEATURE_K8          ( 3*32+ 4) /* "" Opteron, Athlon64 */
  83 #define X86_FEATURE_K7          ( 3*32+ 5) /* "" Athlon */
  84 #define X86_FEATURE_P3          ( 3*32+ 6) /* "" P3 */
  85 #define X86_FEATURE_P4          ( 3*32+ 7) /* "" P4 */
  86 #define X86_FEATURE_CONSTANT_TSC ( 3*32+ 8) /* TSC ticks at a constant rate */
  87 #define X86_FEATURE_UP          ( 3*32+ 9) /* smp kernel running on up */
  88 /* free, was #define X86_FEATURE_FXSAVE_LEAK ( 3*32+10) * "" FXSAVE leaks FOP/FIP/FOP */
  89 #define X86_FEATURE_ARCH_PERFMON ( 3*32+11) /* Intel Architectural PerfMon */
  90 #define X86_FEATURE_PEBS        ( 3*32+12) /* Precise-Event Based Sampling */
  91 #define X86_FEATURE_BTS         ( 3*32+13) /* Branch Trace Store */
  92 #define X86_FEATURE_SYSCALL32   ( 3*32+14) /* "" syscall in ia32 userspace */
  93 #define X86_FEATURE_SYSENTER32  ( 3*32+15) /* "" sysenter in ia32 userspace */
  94 #define X86_FEATURE_REP_GOOD    ( 3*32+16) /* rep microcode works well */
  95 #define X86_FEATURE_MFENCE_RDTSC ( 3*32+17) /* "" Mfence synchronizes RDTSC */
  96 #define X86_FEATURE_LFENCE_RDTSC ( 3*32+18) /* "" Lfence synchronizes RDTSC */
  97 /* free, was #define X86_FEATURE_11AP   ( 3*32+19) * "" Bad local APIC aka 11AP */
  98 #define X86_FEATURE_NOPL        ( 3*32+20) /* The NOPL (0F 1F) instructions */
  99 #define X86_FEATURE_ALWAYS      ( 3*32+21) /* "" Always-present feature */
 100 #define X86_FEATURE_XTOPOLOGY   ( 3*32+22) /* cpu topology enum extensions */
 101 #define X86_FEATURE_TSC_RELIABLE ( 3*32+23) /* TSC is known to be reliable */
 102 #define X86_FEATURE_NONSTOP_TSC ( 3*32+24) /* TSC does not stop in C states */
 103 /* free, was #define X86_FEATURE_CLFLUSH_MONITOR ( 3*32+25) * "" clflush reqd with monitor */
 104 #define X86_FEATURE_EXTD_APICID ( 3*32+26) /* has extended APICID (8 bits) */
 105 #define X86_FEATURE_AMD_DCM     ( 3*32+27) /* multi-node processor */
 106 #define X86_FEATURE_APERFMPERF  ( 3*32+28) /* APERFMPERF */
 107 #define X86_FEATURE_EAGER_FPU   ( 3*32+29) /* "eagerfpu" Non lazy FPU restore */
 108 #define X86_FEATURE_NONSTOP_TSC_S3 ( 3*32+30) /* TSC doesn't stop in S3 state */
 109
 110 /* Intel-defined CPU features, CPUID level 0x00000001 (ecx), word 4 */
 111 #define X86_FEATURE_XMM3        ( 4*32+ 0) /* "pni" SSE-3 */
 112 #define X86_FEATURE_PCLMULQDQ   ( 4*32+ 1) /* PCLMULQDQ instruction */
 113 #define X86_FEATURE_DTES64      ( 4*32+ 2) /* 64-bit Debug Store */
 114 #define X86_FEATURE_MWAIT       ( 4*32+ 3) /* "monitor" Monitor/Mwait support */
 115 #define X86_FEATURE_DSCPL       ( 4*32+ 4) /* "ds_cpl" CPL Qual. Debug Store */
 116 #define X86_FEATURE_VMX         ( 4*32+ 5) /* Hardware virtualization */
 117 #define X86_FEATURE_SMX         ( 4*32+ 6) /* Safer mode */
 118 #define X86_FEATURE_EST         ( 4*32+ 7) /* Enhanced SpeedStep */
 119 #define X86_FEATURE_TM2         ( 4*32+ 8) /* Thermal Monitor 2 */
 120 #define X86_FEATURE_SSSE3       ( 4*32+ 9) /* Supplemental SSE-3 */
 121 #define X86_FEATURE_CID         ( 4*32+10) /* Context ID */
 122 #define X86_FEATURE_SDBG        ( 4*32+11) /* Silicon Debug */
 123 #define X86_FEATURE_FMA         ( 4*32+12) /* Fused multiply-add */
 124 #define X86_FEATURE_CX16        ( 4*32+13) /* CMPXCHG16B */
 125 #define X86_FEATURE_XTPR        ( 4*32+14) /* Send Task Priority Messages */
 126 #define X86_FEATURE_PDCM        ( 4*32+15) /* Performance Capabilities */
 127 #define X86_FEATURE_PCID        ( 4*32+17) /* Process Context Identifiers */
 128 #define X86_FEATURE_DCA         ( 4*32+18) /* Direct Cache Access */
 129 #define X86_FEATURE_XMM4_1      ( 4*32+19) /* "sse4_1" SSE-4.1 */
 130 #define X86_FEATURE_XMM4_2      ( 4*32+20) /* "sse4_2" SSE-4.2 */
 131 #define X86_FEATURE_X2APIC      ( 4*32+21) /* x2APIC */
 132 #define X86_FEATURE_MOVBE       ( 4*32+22) /* MOVBE instruction */
 133 #define X86_FEATURE_POPCNT      ( 4*32+23) /* POPCNT instruction */
 134 #define X86_FEATURE_TSC_DEADLINE_TIMER  ( 4*32+24) /* Tsc deadline timer */
 135 #define X86_FEATURE_AES         ( 4*32+25) /* AES instructions */
 136 #define X86_FEATURE_XSAVE       ( 4*32+26) /* XSAVE/XRSTOR/XSETBV/XGETBV */
 137 #define X86_FEATURE_OSXSAVE     ( 4*32+27) /* "" XSAVE enabled in the OS */
 138 #define X86_FEATURE_AVX         ( 4*32+28) /* Advanced Vector Extensions */
 139 #define X86_FEATURE_F16C        ( 4*32+29) /* 16-bit fp conversions */
 140 #define X86_FEATURE_RDRAND      ( 4*32+30) /* The RDRAND instruction */
 141 #define X86_FEATURE_HYPERVISOR  ( 4*32+31) /* Running on a hypervisor */
 142
 143 /* VIA/Cyrix/Centaur-defined CPU features, CPUID level 0xC0000001, word 5 */
 144 #define X86_FEATURE_XSTORE      ( 5*32+ 2) /* "rng" RNG present (xstore) */
 145 #define X86_FEATURE_XSTORE_EN   ( 5*32+ 3) /* "rng_en" RNG enabled */
 146 #define X86_FEATURE_XCRYPT      ( 5*32+ 6) /* "ace" on-CPU crypto (xcrypt) */
 147 #define X86_FEATURE_XCRYPT_EN   ( 5*32+ 7) /* "ace_en" on-CPU crypto enabled */
 148 #define X86_FEATURE_ACE2        ( 5*32+ 8) /* Advanced Cryptography Engine v2 */
 149 #define X86_FEATURE_ACE2_EN     ( 5*32+ 9) /* ACE v2 enabled */
 150 #define X86_FEATURE_PHE         ( 5*32+10) /* PadLock Hash Engine */
 151 #define X86_FEATURE_PHE_EN      ( 5*32+11) /* PHE enabled */
 152 #define X86_FEATURE_PMM         ( 5*32+12) /* PadLock Montgomery Multiplier */
 153 #define X86_FEATURE_PMM_EN      ( 5*32+13) /* PMM enabled */
 154
 155 /* More extended AMD flags: CPUID level 0x80000001, ecx, word 6 */
 156 #define X86_FEATURE_LAHF_LM     ( 6*32+ 0) /* LAHF/SAHF in long mode */
 157 #define X86_FEATURE_CMP_LEGACY  ( 6*32+ 1) /* If yes HyperThreading not valid */
 158 #define X86_FEATURE_SVM         ( 6*32+ 2) /* Secure virtual machine */
 159 #define X86_FEATURE_EXTAPIC     ( 6*32+ 3) /* Extended APIC space */
 160 #define X86_FEATURE_CR8_LEGACY  ( 6*32+ 4) /* CR8 in 32-bit mode */
 161 #define X86_FEATURE_ABM         ( 6*32+ 5) /* Advanced bit manipulation */
 162 #define X86_FEATURE_SSE4A       ( 6*32+ 6) /* SSE-4A */
 163 #define X86_FEATURE_MISALIGNSSE ( 6*32+ 7) /* Misaligned SSE mode */
 164 #define X86_FEATURE_3DNOWPREFETCH ( 6*32+ 8) /* 3DNow prefetch instructions */
 165 #define X86_FEATURE_OSVW        ( 6*32+ 9) /* OS Visible Workaround */
 166 #define X86_FEATURE_IBS         ( 6*32+10) /* Instruction Based Sampling */
 167 #define X86_FEATURE_XOP         ( 6*32+11) /* extended AVX instructions */
 168 #define X86_FEATURE_SKINIT      ( 6*32+12) /* SKINIT/STGI instructions */
 169 #define X86_FEATURE_WDT         ( 6*32+13) /* Watchdog timer */
 170 #define X86_FEATURE_LWP         ( 6*32+15) /* Light Weight Profiling */
 171 #define X86_FEATURE_FMA4        ( 6*32+16) /* 4 operands MAC instructions */
 172 #define X86_FEATURE_TCE         ( 6*32+17) /* translation cache extension */
 173 #define X86_FEATURE_NODEID_MSR  ( 6*32+19) /* NodeId MSR */
 174 #define X86_FEATURE_TBM         ( 6*32+21) /* trailing bit manipulations */
 175 #define X86_FEATURE_TOPOEXT     ( 6*32+22) /* topology extensions CPUID leafs */
 176 #define X86_FEATURE_PERFCTR_CORE ( 6*32+23) /* core performance counter extensions */
 177 #define X86_FEATURE_PERFCTR_NB  ( 6*32+24) /* NB performance counter extensions */
 178 #define X86_FEATURE_BPEXT       (6*32+26) /* data breakpoint extension */
 179 #define X86_FEATURE_PERFCTR_L2  ( 6*32+28) /* L2 performance counter extensions */
 180 #define X86_FEATURE_MWAITX      ( 6*32+29) /* MWAIT extension (MONITORX/MWAITX) */
 181
 182 /*
 183  * Auxiliary flags: Linux defined - For features scattered in various
 184  * CPUID levels like 0x6, 0xA etc, word 7
 185  */
 186 #define X86_FEATURE_IDA         ( 7*32+ 0) /* Intel Dynamic Acceleration */
 187 #define X86_FEATURE_ARAT        ( 7*32+ 1) /* Always Running APIC Timer */
 188 #define X86_FEATURE_CPB         ( 7*32+ 2) /* AMD Core Performance Boost */
 189 #define X86_FEATURE_EPB         ( 7*32+ 3) /* IA32_ENERGY_PERF_BIAS support */
 190 #define X86_FEATURE_PLN         ( 7*32+ 5) /* Intel Power Limit Notification */
 191 #define X86_FEATURE_PTS         ( 7*32+ 6) /* Intel Package Thermal Status */
 192 #define X86_FEATURE_DTHERM      ( 7*32+ 7) /* Digital Thermal Sensor */
 193 #define X86_FEATURE_HW_PSTATE   ( 7*32+ 8) /* AMD HW-PState */
 194 #define X86_FEATURE_PROC_FEEDBACK ( 7*32+ 9) /* AMD ProcFeedbackInterface */
 195 #define X86_FEATURE_HWP         ( 7*32+ 10) /* "hwp" Intel HWP */
 196 #define X86_FEATURE_HWP_NOITFY  ( 7*32+ 11) /* Intel HWP_NOTIFY */
 197 #define X86_FEATURE_HWP_ACT_WINDOW ( 7*32+ 12) /* Intel HWP_ACT_WINDOW */
 198 #define X86_FEATURE_HWP_EPP     ( 7*32+13) /* Intel HWP_EPP */
 199 #define X86_FEATURE_HWP_PKG_REQ ( 7*32+14) /* Intel HWP_PKG_REQ */
 200 #define X86_FEATURE_INTEL_PT    ( 7*32+15) /* Intel Processor Trace */
 201
 202 /* Virtualization flags: Linux defined, word 8 */
 203 #define X86_FEATURE_TPR_SHADOW  ( 8*32+ 0) /* Intel TPR Shadow */
 204 #define X86_FEATURE_VNMI        ( 8*32+ 1) /* Intel Virtual NMI */
 205 #define X86_FEATURE_FLEXPRIORITY ( 8*32+ 2) /* Intel FlexPriority */
 206 #define X86_FEATURE_EPT         ( 8*32+ 3) /* Intel Extended Page Table */
 207 #define X86_FEATURE_VPID        ( 8*32+ 4) /* Intel Virtual Processor ID */
 208 #define X86_FEATURE_NPT         ( 8*32+ 5) /* AMD Nested Page Table support */
 209 #define X86_FEATURE_LBRV        ( 8*32+ 6) /* AMD LBR Virtualization support */
 210 #define X86_FEATURE_SVML        ( 8*32+ 7) /* "svm_lock" AMD SVM locking MSR */
 211 #define X86_FEATURE_NRIPS       ( 8*32+ 8) /* "nrip_save" AMD SVM next_rip save */
 212 #define X86_FEATURE_TSCRATEMSR  ( 8*32+ 9) /* "tsc_scale" AMD TSC scaling support */
 213 #define X86_FEATURE_VMCBCLEAN   ( 8*32+10) /* "vmcb_clean" AMD VMCB clean bits support */
 214 #define X86_FEATURE_FLUSHBYASID ( 8*32+11) /* AMD flush-by-ASID support */
 215 #define X86_FEATURE_DECODEASSISTS ( 8*32+12) /* AMD Decode Assists support */
 216 #define X86_FEATURE_PAUSEFILTER ( 8*32+13) /* AMD filtered pause intercept */
 217 #define X86_FEATURE_PFTHRESHOLD ( 8*32+14) /* AMD pause filter threshold */
 218 #define X86_FEATURE_VMMCALL     ( 8*32+15) /* Prefer vmmcall to vmcall */
 219
 220
 221 /* Intel-defined CPU features, CPUID level 0x00000007:0 (ebx), word 9 */
 222 #define X86_FEATURE_FSGSBASE    ( 9*32+ 0) /* {RD/WR}{FS/GS}BASE instructions*/
 223 #define X86_FEATURE_TSC_ADJUST  ( 9*32+ 1) /* TSC adjustment MSR 0x3b */
 224 #define X86_FEATURE_BMI1        ( 9*32+ 3) /* 1st group bit manipulation extensions */
 225 #define X86_FEATURE_HLE         ( 9*32+ 4) /* Hardware Lock Elision */
 226 #define X86_FEATURE_AVX2        ( 9*32+ 5) /* AVX2 instructions */
 227 #define X86_FEATURE_SMEP        ( 9*32+ 7) /* Supervisor Mode Execution Protection */
 228 #define X86_FEATURE_BMI2        ( 9*32+ 8) /* 2nd group bit manipulation extensions */
 229 #define X86_FEATURE_ERMS        ( 9*32+ 9) /* Enhanced REP MOVSB/STOSB */
 230 #define X86_FEATURE_INVPCID     ( 9*32+10) /* Invalidate Processor Context ID */
 231 #define X86_FEATURE_RTM         ( 9*32+11) /* Restricted Transactional Memory */
 232 #define X86_FEATURE_CQM         ( 9*32+12) /* Cache QoS Monitoring */
 233 #define X86_FEATURE_MPX         ( 9*32+14) /* Memory Protection Extension */
 234 #define X86_FEATURE_AVX512F     ( 9*32+16) /* AVX-512 Foundation */
 235 #define X86_FEATURE_RDSEED      ( 9*32+18) /* The RDSEED instruction */
 236 #define X86_FEATURE_ADX         ( 9*32+19) /* The ADCX and ADOX instructions */
 237 #define X86_FEATURE_SMAP        ( 9*32+20) /* Supervisor Mode Access Prevention */
 238 #define X86_FEATURE_PCOMMIT     ( 9*32+22) /* PCOMMIT instruction */
 239 #define X86_FEATURE_CLFLUSHOPT  ( 9*32+23) /* CLFLUSHOPT instruction */
 240 #define X86_FEATURE_CLWB        ( 9*32+24) /* CLWB instruction */
 241 #define X86_FEATURE_AVX512PF    ( 9*32+26) /* AVX-512 Prefetch */
 242 #define X86_FEATURE_AVX512ER    ( 9*32+27) /* AVX-512 Exponential and Reciprocal */
 243 #define X86_FEATURE_AVX512CD    ( 9*32+28) /* AVX-512 Conflict Detection */
 244
 245 /* Extended state features, CPUID level 0x0000000d:1 (eax), word 10 */
 246 #define X86_FEATURE_XSAVEOPT    (10*32+ 0) /* XSAVEOPT */
 247 #define X86_FEATURE_XSAVEC      (10*32+ 1) /* XSAVEC */
 248 #define X86_FEATURE_XGETBV1     (10*32+ 2) /* XGETBV with ECX = 1 */
 249 #define X86_FEATURE_XSAVES      (10*32+ 3) /* XSAVES/XRSTORS */
 250
 251 /* Intel-defined CPU QoS Sub-leaf, CPUID level 0x0000000F:0 (edx), word 11 */
 252 #define X86_FEATURE_CQM_LLC     (11*32+ 1) /* LLC QoS if 1 */
 253
 254 /* Intel-defined CPU QoS Sub-leaf, CPUID level 0x0000000F:1 (edx), word 12 */
 255 #define X86_FEATURE_CQM_OCCUP_LLC (12*32+ 0) /* LLC occupancy monitoring if 1 */
 256
 257 /*
 258  * BUG word(s)
 259  */
 260 #define X86_BUG(x)              (NCAPINTS*32 + (x))
 261
 262 #define X86_BUG_F00F            X86_BUG(0) /* Intel F00F */
 263 #define X86_BUG_FDIV            X86_BUG(1) /* FPU FDIV */
 264 #define X86_BUG_COMA            X86_BUG(2) /* Cyrix 6x86 coma */
 265 #define X86_BUG_AMD_TLB_MMATCH  X86_BUG(3) /* "tlb_mmatch" AMD Erratum 383 */
 266 #define X86_BUG_AMD_APIC_C1E    X86_BUG(4) /* "apic_c1e" AMD Erratum 400 */
 267 #define X86_BUG_11AP            X86_BUG(5) /* Bad local APIC aka 11AP */
 268 #define X86_BUG_FXSAVE_LEAK     X86_BUG(6) /* FXSAVE leaks FOP/FIP/FOP */
 269 #define X86_BUG_CLFLUSH_MONITOR X86_BUG(7) /* AAI65, CLFLUSH required before MONITOR */
 270 #define X86_BUG_SYSRET_SS_ATTRS X86_BUG(8) /* SYSRET doesn't fix up SS attrs */
 271
 272 #if defined(__KERNEL__) && !defined(__ASSEMBLY__)
 273
 274 #include <asm/asm.h>
 275 #include <linux/bitops.h>
 276
 277 #ifdef CONFIG_X86_FEATURE_NAMES
 278 extern const char * const x86_cap_flags[NCAPINTS*32];
 279 extern const char * const x86_power_flags[32];
 280 #define X86_CAP_FMT "%s"
 281 #define x86_cap_flag(flag) x86_cap_flags[flag]
 282 #else
 283 #define X86_CAP_FMT "%d:%d"
 284 #define x86_cap_flag(flag) ((flag) >> 5), ((flag) & 31)
 285 #endif
 286
 287 /*
 288  * In order to save room, we index into this array by doing
 289  * X86_BUG_<name> - NCAPINTS*32.
 290  */
 291 extern const char * const x86_bug_flags[NBUGINTS*32];
 292
 293 #define test_cpu_cap(c, bit)                                            \
 294          test_bit(bit, (unsigned long *)((c)->x86_capability))
 295
 296 #define REQUIRED_MASK_BIT_SET(bit)                                      \
 297          ( (((bit)>>5)==0 && (1UL<<((bit)&31) & REQUIRED_MASK0)) ||     \
 298            (((bit)>>5)==1 && (1UL<<((bit)&31) & REQUIRED_MASK1)) ||     \
 299            (((bit)>>5)==2 && (1UL<<((bit)&31) & REQUIRED_MASK2)) ||     \
 300            (((bit)>>5)==3 && (1UL<<((bit)&31) & REQUIRED_MASK3)) ||     \
 301            (((bit)>>5)==4 && (1UL<<((bit)&31) & REQUIRED_MASK4)) ||     \
 302            (((bit)>>5)==5 && (1UL<<((bit)&31) & REQUIRED_MASK5)) ||     \
 303            (((bit)>>5)==6 && (1UL<<((bit)&31) & REQUIRED_MASK6)) ||     \
 304            (((bit)>>5)==7 && (1UL<<((bit)&31) & REQUIRED_MASK7)) ||     \
 305            (((bit)>>5)==8 && (1UL<<((bit)&31) & REQUIRED_MASK8)) ||     \
 306            (((bit)>>5)==9 && (1UL<<((bit)&31) & REQUIRED_MASK9)) )
 307
 308 #define DISABLED_MASK_BIT_SET(bit)                                      \
 309          ( (((bit)>>5)==0 && (1UL<<((bit)&31) & DISABLED_MASK0)) ||     \
 310            (((bit)>>5)==1 && (1UL<<((bit)&31) & DISABLED_MASK1)) ||     \
 311            (((bit)>>5)==2 && (1UL<<((bit)&31) & DISABLED_MASK2)) ||     \
 312            (((bit)>>5)==3 && (1UL<<((bit)&31) & DISABLED_MASK3)) ||     \
 313            (((bit)>>5)==4 && (1UL<<((bit)&31) & DISABLED_MASK4)) ||     \
 314            (((bit)>>5)==5 && (1UL<<((bit)&31) & DISABLED_MASK5)) ||     \
 315            (((bit)>>5)==6 && (1UL<<((bit)&31) & DISABLED_MASK6)) ||     \
 316            (((bit)>>5)==7 && (1UL<<((bit)&31) & DISABLED_MASK7)) ||     \
 317            (((bit)>>5)==8 && (1UL<<((bit)&31) & DISABLED_MASK8)) ||     \
 318            (((bit)>>5)==9 && (1UL<<((bit)&31) & DISABLED_MASK9)) )
 319
 320 #define cpu_has(c, bit)                                                 \
 321         (__builtin_constant_p(bit) && REQUIRED_MASK_BIT_SET(bit) ? 1 :  \
 322          test_cpu_cap(c, bit))
 323
 324 #define this_cpu_has(bit)                                               \
 325         (__builtin_constant_p(bit) && REQUIRED_MASK_BIT_SET(bit) ? 1 :  \
 326          x86_this_cpu_test_bit(bit, (unsigned long *)&cpu_info.x86_capability))
 327
 328 /*
 329  * This macro is for detection of features which need kernel
 330  * infrastructure to be used.  It may *not* directly test the CPU
 331  * itself.  Use the cpu_has() family if you want true runtime
 332  * testing of CPU features, like in hypervisor code where you are
 333  * supporting a possible guest feature where host support for it
 334  * is not relevant.
 335  */
 336 #define cpu_feature_enabled(bit)        \
 337         (__builtin_constant_p(bit) && DISABLED_MASK_BIT_SET(bit) ? 0 :  \
 338          cpu_has(&boot_cpu_data, bit))
 339
 340 #define boot_cpu_has(bit)       cpu_has(&boot_cpu_data, bit)
 341
 342 #define set_cpu_cap(c, bit)     set_bit(bit, (unsigned long *)((c)->x86_capability))
 343 #define clear_cpu_cap(c, bit)   clear_bit(bit, (unsigned long *)((c)->x86_capability))
 344 #define setup_clear_cpu_cap(bit) do { \
 345         clear_cpu_cap(&boot_cpu_data, bit);     \
 346         set_bit(bit, (unsigned long *)cpu_caps_cleared); \
 347 } while (0)
 348 #define setup_force_cpu_cap(bit) do { \
 349         set_cpu_cap(&boot_cpu_data, bit);       \
 350         set_bit(bit, (unsigned long *)cpu_caps_set);    \
 351 } while (0)
 352
 353 #define cpu_has_fpu             boot_cpu_has(X86_FEATURE_FPU)
 354 #define cpu_has_de              boot_cpu_has(X86_FEATURE_DE)
 355 #define cpu_has_pse             boot_cpu_has(X86_FEATURE_PSE)
 356 #define cpu_has_tsc             boot_cpu_has(X86_FEATURE_TSC)
 357 #define cpu_has_pge             boot_cpu_has(X86_FEATURE_PGE)
 358 #define cpu_has_apic            boot_cpu_has(X86_FEATURE_APIC)
 359 #define cpu_has_sep             boot_cpu_has(X86_FEATURE_SEP)
 360 #define cpu_has_mtrr            boot_cpu_has(X86_FEATURE_MTRR)
 361 #define cpu_has_mmx             boot_cpu_has(X86_FEATURE_MMX)
 362 #define cpu_has_fxsr            boot_cpu_has(X86_FEATURE_FXSR)
 363 #define cpu_has_xmm             boot_cpu_has(X86_FEATURE_XMM)
 364 #define cpu_has_xmm2            boot_cpu_has(X86_FEATURE_XMM2)
 365 #define cpu_has_xmm3            boot_cpu_has(X86_FEATURE_XMM3)
 366 #define cpu_has_ssse3           boot_cpu_has(X86_FEATURE_SSSE3)
 367 #define cpu_has_aes             boot_cpu_has(X86_FEATURE_AES)
 368 #define cpu_has_avx             boot_cpu_has(X86_FEATURE_AVX)
 369 #define cpu_has_avx2            boot_cpu_has(X86_FEATURE_AVX2)
 370 #define cpu_has_ht              boot_cpu_has(X86_FEATURE_HT)
 371 #define cpu_has_nx              boot_cpu_has(X86_FEATURE_NX)
 372 #define cpu_has_xstore          boot_cpu_has(X86_FEATURE_XSTORE)
 373 #define cpu_has_xstore_enabled  boot_cpu_has(X86_FEATURE_XSTORE_EN)
 374 #define cpu_has_xcrypt          boot_cpu_has(X86_FEATURE_XCRYPT)
 375 #define cpu_has_xcrypt_enabled  boot_cpu_has(X86_FEATURE_XCRYPT_EN)
 376 #define cpu_has_ace2            boot_cpu_has(X86_FEATURE_ACE2)
 377 #define cpu_has_ace2_enabled    boot_cpu_has(X86_FEATURE_ACE2_EN)
 378 #define cpu_has_phe             boot_cpu_has(X86_FEATURE_PHE)
 379 #define cpu_has_phe_enabled     boot_cpu_has(X86_FEATURE_PHE_EN)
 380 #define cpu_has_pmm             boot_cpu_has(X86_FEATURE_PMM)
 381 #define cpu_has_pmm_enabled     boot_cpu_has(X86_FEATURE_PMM_EN)
 382 #define cpu_has_ds              boot_cpu_has(X86_FEATURE_DS)
 383 #define cpu_has_pebs            boot_cpu_has(X86_FEATURE_PEBS)
 384 #define cpu_has_clflush         boot_cpu_has(X86_FEATURE_CLFLUSH)
 385 #define cpu_has_bts             boot_cpu_has(X86_FEATURE_BTS)
 386 #define cpu_has_gbpages         boot_cpu_has(X86_FEATURE_GBPAGES)
 387 #define cpu_has_arch_perfmon    boot_cpu_has(X86_FEATURE_ARCH_PERFMON)
 388 #define cpu_has_pat             boot_cpu_has(X86_FEATURE_PAT)
 389 #define cpu_has_xmm4_1          boot_cpu_has(X86_FEATURE_XMM4_1)
 390 #define cpu_has_xmm4_2          boot_cpu_has(X86_FEATURE_XMM4_2)
 391 #define cpu_has_x2apic          boot_cpu_has(X86_FEATURE_X2APIC)
 392 #define cpu_has_xsave           boot_cpu_has(X86_FEATURE_XSAVE)
 393 #define cpu_has_xsaveopt        boot_cpu_has(X86_FEATURE_XSAVEOPT)
 394 #define cpu_has_xsaves          boot_cpu_has(X86_FEATURE_XSAVES)
 395 #define cpu_has_osxsave         boot_cpu_has(X86_FEATURE_OSXSAVE)
 396 #define cpu_has_hypervisor      boot_cpu_has(X86_FEATURE_HYPERVISOR)
 397 #define cpu_has_pclmulqdq       boot_cpu_has(X86_FEATURE_PCLMULQDQ)
 398 #define cpu_has_perfctr_core    boot_cpu_has(X86_FEATURE_PERFCTR_CORE)
 399 #define cpu_has_perfctr_nb      boot_cpu_has(X86_FEATURE_PERFCTR_NB)
 400 #define cpu_has_perfctr_l2      boot_cpu_has(X86_FEATURE_PERFCTR_L2)
 401 #define cpu_has_cx8             boot_cpu_has(X86_FEATURE_CX8)
 402 #define cpu_has_cx16            boot_cpu_has(X86_FEATURE_CX16)
 403 #define cpu_has_eager_fpu       boot_cpu_has(X86_FEATURE_EAGER_FPU)
 404 #define cpu_has_topoext         boot_cpu_has(X86_FEATURE_TOPOEXT)
 405 #define cpu_has_bpext           boot_cpu_has(X86_FEATURE_BPEXT)
 406
 407 #if __GNUC__ >= 4
 408 extern void warn_pre_alternatives(void);
 409 extern bool __static_cpu_has_safe(u16 bit);
 410
 411 /*
 412  * Static testing of CPU features.  Used the same as boot_cpu_has().
 413  * These are only valid after alternatives have run, but will statically
 414  * patch the target code for additional performance.
 415  */
 416 static __always_inline __pure bool __static_cpu_has(u16 bit)
 417 {
 418 #ifdef CC_HAVE_ASM_GOTO
 419
 420 #ifdef CONFIG_X86_DEBUG_STATIC_CPU_HAS
 421
 422                 /*
 423                  * Catch too early usage of this before alternatives
 424                  * have run.
 425                  */
 426                 asm_volatile_goto("1: jmp %l[t_warn]\n"
 427                          "2:\n"
 428                          ".section .altinstructions,\"a\"\n"
 429                          " .long 1b - .\n"
 430                          " .long 0\n"           /* no replacement */
 431                          " .word %P0\n"         /* 1: do replace */
 432                          " .byte 2b - 1b\n"     /* source len */
 433                          " .byte 0\n"           /* replacement len */
 434                          " .byte 0\n"           /* pad len */
 435                          ".previous\n"
 436                          /* skipping size check since replacement size = 0 */
 437                          : : "i" (X86_FEATURE_ALWAYS) : : t_warn);
 438
 439 #endif
 440
 441                 asm_volatile_goto("1: jmp %l[t_no]\n"
 442                          "2:\n"
 443                          ".section .altinstructions,\"a\"\n"
 444                          " .long 1b - .\n"
 445                          " .long 0\n"           /* no replacement */
 446                          " .word %P0\n"         /* feature bit */
 447                          " .byte 2b - 1b\n"     /* source len */
 448                          " .byte 0\n"           /* replacement len */
 449                          " .byte 0\n"           /* pad len */
 450                          ".previous\n"
 451                          /* skipping size check since replacement size = 0 */
 452                          : : "i" (bit) : : t_no);
 453                 return true;
 454         t_no:
 455                 return false;
 456
 457 #ifdef CONFIG_X86_DEBUG_STATIC_CPU_HAS
 458         t_warn:
 459                 warn_pre_alternatives();
 460                 return false;
 461 #endif
 462
 463 #else /* CC_HAVE_ASM_GOTO */
 464
 465                 u8 flag;
 466                 /* Open-coded due to __stringify() in ALTERNATIVE() */
 467                 asm volatile("1: movb $0,%0\n"
 468                              "2:\n"
 469                              ".section .altinstructions,\"a\"\n"
 470                              " .long 1b - .\n"
 471                              " .long 3f - .\n"
 472                              " .word %P1\n"             /* feature bit */
 473                              " .byte 2b - 1b\n"         /* source len */
 474                              " .byte 4f - 3f\n"         /* replacement len */
 475                              " .byte 0\n"               /* pad len */
 476                              ".previous\n"
 477                              ".section .discard,\"aw\",@progbits\n"
 478                              " .byte 0xff + (4f-3f) - (2b-1b)\n" /* size check */
 479                              ".previous\n"
 480                              ".section .altinstr_replacement,\"ax\"\n"
 481                              "3: movb $1,%0\n"
 482                              "4:\n"
 483                              ".previous\n"
 484                              : "=qm" (flag) : "i" (bit));
 485                 return flag;
 486
 487 #endif /* CC_HAVE_ASM_GOTO */
 488 }
 489
 490 #define static_cpu_has(bit)                                     \
 491 (                                                               \
 492         __builtin_constant_p(boot_cpu_has(bit)) ?               \
 493                 boot_cpu_has(bit) :                             \
 494         __builtin_constant_p(bit) ?                             \
 495                 __static_cpu_has(bit) :                         \
 496                 boot_cpu_has(bit)                               \
 497 )
 498
 499 static __always_inline __pure bool _static_cpu_has_safe(u16 bit)
 500 {
 501 #ifdef CC_HAVE_ASM_GOTO
 502                 asm_volatile_goto("1: jmp %l[t_dynamic]\n"
 503                          "2:\n"
 504                          ".skip -(((5f-4f) - (2b-1b)) > 0) * "
 505                                  "((5f-4f) - (2b-1b)),0x90\n"
 506                          "3:\n"
 507                          ".section .altinstructions,\"a\"\n"
 508                          " .long 1b - .\n"              /* src offset */
 509                          " .long 4f - .\n"              /* repl offset */
 510                          " .word %P1\n"                 /* always replace */
 511                          " .byte 3b - 1b\n"             /* src len */
 512                          " .byte 5f - 4f\n"             /* repl len */
 513                          " .byte 3b - 2b\n"             /* pad len */
 514                          ".previous\n"
 515                          ".section .altinstr_replacement,\"ax\"\n"
 516                          "4: jmp %l[t_no]\n"
 517                          "5:\n"
 518                          ".previous\n"
 519                          ".section .altinstructions,\"a\"\n"
 520                          " .long 1b - .\n"              /* src offset */
 521                          " .long 0\n"                   /* no replacement */
 522                          " .word %P0\n"                 /* feature bit */
 523                          " .byte 3b - 1b\n"             /* src len */
 524                          " .byte 0\n"                   /* repl len */
 525                          " .byte 0\n"                   /* pad len */
 526                          ".previous\n"
 527                          : : "i" (bit), "i" (X86_FEATURE_ALWAYS)
 528                          : : t_dynamic, t_no);
 529                 return true;
 530         t_no:
 531                 return false;
 532         t_dynamic:
 533                 return __static_cpu_has_safe(bit);
 534 #else
 535                 u8 flag;
 536                 /* Open-coded due to __stringify() in ALTERNATIVE() */
 537                 asm volatile("1: movb $2,%0\n"
 538                              "2:\n"
 539                              ".section .altinstructions,\"a\"\n"
 540                              " .long 1b - .\n"          /* src offset */
 541                              " .long 3f - .\n"          /* repl offset */
 542                              " .word %P2\n"             /* always replace */
 543                              " .byte 2b - 1b\n"         /* source len */
 544                              " .byte 4f - 3f\n"         /* replacement len */
 545                              " .byte 0\n"               /* pad len */
 546                              ".previous\n"
 547                              ".section .discard,\"aw\",@progbits\n"
 548                              " .byte 0xff + (4f-3f) - (2b-1b)\n" /* size check */
 549                              ".previous\n"
 550                              ".section .altinstr_replacement,\"ax\"\n"
 551                              "3: movb $0,%0\n"
 552                              "4:\n"
 553                              ".previous\n"
 554                              ".section .altinstructions,\"a\"\n"
 555                              " .long 1b - .\n"          /* src offset */
 556                              " .long 5f - .\n"          /* repl offset */
 557                              " .word %P1\n"             /* feature bit */
 558                              " .byte 4b - 3b\n"         /* src len */
 559                              " .byte 6f - 5f\n"         /* repl len */
 560                              " .byte 0\n"               /* pad len */
 561                              ".previous\n"
 562                              ".section .discard,\"aw\",@progbits\n"
 563                              " .byte 0xff + (6f-5f) - (4b-3b)\n" /* size check */
 564                              ".previous\n"
 565                              ".section .altinstr_replacement,\"ax\"\n"
 566                              "5: movb $1,%0\n"
 567                              "6:\n"
 568                              ".previous\n"
 569                              : "=qm" (flag)
 570                              : "i" (bit), "i" (X86_FEATURE_ALWAYS));
 571                 return (flag == 2 ? __static_cpu_has_safe(bit) : flag);
 572 #endif /* CC_HAVE_ASM_GOTO */
 573 }
 574
 575 #define static_cpu_has_safe(bit)                                \
 576 (                                                               \
 577         __builtin_constant_p(boot_cpu_has(bit)) ?               \
 578                 boot_cpu_has(bit) :                             \
 579                 _static_cpu_has_safe(bit)                       \
 580 )
 581 #else
 582 /*
 583  * gcc 3.x is too stupid to do the static test; fall back to dynamic.
 584  */
 585 #define static_cpu_has(bit)             boot_cpu_has(bit)
 586 #define static_cpu_has_safe(bit)        boot_cpu_has(bit)
 587 #endif
 588
 589 #define cpu_has_bug(c, bit)             cpu_has(c, (bit))
 590 #define set_cpu_bug(c, bit)             set_cpu_cap(c, (bit))
 591 #define clear_cpu_bug(c, bit)           clear_cpu_cap(c, (bit))
 592
 593 #define static_cpu_has_bug(bit)         static_cpu_has((bit))
 594 #define static_cpu_has_bug_safe(bit)    static_cpu_has_safe((bit))
 595 #define boot_cpu_has_bug(bit)           cpu_has_bug(&boot_cpu_data, (bit))
 596
 597 #define MAX_CPU_FEATURES                (NCAPINTS * 32)
 598 #define cpu_have_feature                boot_cpu_has
 599
 600 #define CPU_FEATURE_TYPEFMT             "x86,ven%04Xfam%04Xmod%04X"
 601 #define CPU_FEATURE_TYPEVAL             boot_cpu_data.x86_vendor, boot_cpu_data.x86, \
 602                                         boot_cpu_data.x86_model
 603
 604 #endif /* defined(__KERNEL__) && !defined(__ASSEMBLY__) */
 605 #endif /* _ASM_X86_CPUFEATURE_H */