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        11      /* 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_FMA         ( 4*32+12) /* Fused multiply-add */
 123 #define X86_FEATURE_CX16        ( 4*32+13) /* CMPXCHG16B */
 124 #define X86_FEATURE_XTPR        ( 4*32+14) /* Send Task Priority Messages */
 125 #define X86_FEATURE_PDCM        ( 4*32+15) /* Performance Capabilities */
 126 #define X86_FEATURE_PCID        ( 4*32+17) /* Process Context Identifiers */
 127 #define X86_FEATURE_DCA         ( 4*32+18) /* Direct Cache Access */
 128 #define X86_FEATURE_XMM4_1      ( 4*32+19) /* "sse4_1" SSE-4.1 */
 129 #define X86_FEATURE_XMM4_2      ( 4*32+20) /* "sse4_2" SSE-4.2 */
 130 #define X86_FEATURE_X2APIC      ( 4*32+21) /* x2APIC */
 131 #define X86_FEATURE_MOVBE       ( 4*32+22) /* MOVBE instruction */
 132 #define X86_FEATURE_POPCNT      ( 4*32+23) /* POPCNT instruction */
 133 #define X86_FEATURE_TSC_DEADLINE_TIMER  ( 4*32+24) /* Tsc deadline timer */
 134 #define X86_FEATURE_AES         ( 4*32+25) /* AES instructions */
 135 #define X86_FEATURE_XSAVE       ( 4*32+26) /* XSAVE/XRSTOR/XSETBV/XGETBV */
 136 #define X86_FEATURE_OSXSAVE     ( 4*32+27) /* "" XSAVE enabled in the OS */
 137 #define X86_FEATURE_AVX         ( 4*32+28) /* Advanced Vector Extensions */
 138 #define X86_FEATURE_F16C        ( 4*32+29) /* 16-bit fp conversions */
 139 #define X86_FEATURE_RDRAND      ( 4*32+30) /* The RDRAND instruction */
 140 #define X86_FEATURE_HYPERVISOR  ( 4*32+31) /* Running on a hypervisor */
 141
 142 /* VIA/Cyrix/Centaur-defined CPU features, CPUID level 0xC0000001, word 5 */
 143 #define X86_FEATURE_XSTORE      ( 5*32+ 2) /* "rng" RNG present (xstore) */
 144 #define X86_FEATURE_XSTORE_EN   ( 5*32+ 3) /* "rng_en" RNG enabled */
 145 #define X86_FEATURE_XCRYPT      ( 5*32+ 6) /* "ace" on-CPU crypto (xcrypt) */
 146 #define X86_FEATURE_XCRYPT_EN   ( 5*32+ 7) /* "ace_en" on-CPU crypto enabled */
 147 #define X86_FEATURE_ACE2        ( 5*32+ 8) /* Advanced Cryptography Engine v2 */
 148 #define X86_FEATURE_ACE2_EN     ( 5*32+ 9) /* ACE v2 enabled */
 149 #define X86_FEATURE_PHE         ( 5*32+10) /* PadLock Hash Engine */
 150 #define X86_FEATURE_PHE_EN      ( 5*32+11) /* PHE enabled */
 151 #define X86_FEATURE_PMM         ( 5*32+12) /* PadLock Montgomery Multiplier */
 152 #define X86_FEATURE_PMM_EN      ( 5*32+13) /* PMM enabled */
 153
 154 /* More extended AMD flags: CPUID level 0x80000001, ecx, word 6 */
 155 #define X86_FEATURE_LAHF_LM     ( 6*32+ 0) /* LAHF/SAHF in long mode */
 156 #define X86_FEATURE_CMP_LEGACY  ( 6*32+ 1) /* If yes HyperThreading not valid */
 157 #define X86_FEATURE_SVM         ( 6*32+ 2) /* Secure virtual machine */
 158 #define X86_FEATURE_EXTAPIC     ( 6*32+ 3) /* Extended APIC space */
 159 #define X86_FEATURE_CR8_LEGACY  ( 6*32+ 4) /* CR8 in 32-bit mode */
 160 #define X86_FEATURE_ABM         ( 6*32+ 5) /* Advanced bit manipulation */
 161 #define X86_FEATURE_SSE4A       ( 6*32+ 6) /* SSE-4A */
 162 #define X86_FEATURE_MISALIGNSSE ( 6*32+ 7) /* Misaligned SSE mode */
 163 #define X86_FEATURE_3DNOWPREFETCH ( 6*32+ 8) /* 3DNow prefetch instructions */
 164 #define X86_FEATURE_OSVW        ( 6*32+ 9) /* OS Visible Workaround */
 165 #define X86_FEATURE_IBS         ( 6*32+10) /* Instruction Based Sampling */
 166 #define X86_FEATURE_XOP         ( 6*32+11) /* extended AVX instructions */
 167 #define X86_FEATURE_SKINIT      ( 6*32+12) /* SKINIT/STGI instructions */
 168 #define X86_FEATURE_WDT         ( 6*32+13) /* Watchdog timer */
 169 #define X86_FEATURE_LWP         ( 6*32+15) /* Light Weight Profiling */
 170 #define X86_FEATURE_FMA4        ( 6*32+16) /* 4 operands MAC instructions */
 171 #define X86_FEATURE_TCE         ( 6*32+17) /* translation cache extension */
 172 #define X86_FEATURE_NODEID_MSR  ( 6*32+19) /* NodeId MSR */
 173 #define X86_FEATURE_TBM         ( 6*32+21) /* trailing bit manipulations */
 174 #define X86_FEATURE_TOPOEXT     ( 6*32+22) /* topology extensions CPUID leafs */
 175 #define X86_FEATURE_PERFCTR_CORE ( 6*32+23) /* core performance counter extensions */
 176 #define X86_FEATURE_PERFCTR_NB  ( 6*32+24) /* NB performance counter extensions */
 177 #define X86_FEATURE_BPEXT       (6*32+26) /* data breakpoint extension */
 178 #define X86_FEATURE_PERFCTR_L2  ( 6*32+28) /* L2 performance counter extensions */
 179
 180 /*
 181  * Auxiliary flags: Linux defined - For features scattered in various
 182  * CPUID levels like 0x6, 0xA etc, word 7
 183  */
 184 #define X86_FEATURE_IDA         ( 7*32+ 0) /* Intel Dynamic Acceleration */
 185 #define X86_FEATURE_ARAT        ( 7*32+ 1) /* Always Running APIC Timer */
 186 #define X86_FEATURE_CPB         ( 7*32+ 2) /* AMD Core Performance Boost */
 187 #define X86_FEATURE_EPB         ( 7*32+ 3) /* IA32_ENERGY_PERF_BIAS support */
 188 #define X86_FEATURE_PLN         ( 7*32+ 5) /* Intel Power Limit Notification */
 189 #define X86_FEATURE_PTS         ( 7*32+ 6) /* Intel Package Thermal Status */
 190 #define X86_FEATURE_DTHERM      ( 7*32+ 7) /* Digital Thermal Sensor */
 191 #define X86_FEATURE_HW_PSTATE   ( 7*32+ 8) /* AMD HW-PState */
 192 #define X86_FEATURE_PROC_FEEDBACK ( 7*32+ 9) /* AMD ProcFeedbackInterface */
 193 #define X86_FEATURE_HWP         ( 7*32+ 10) /* "hwp" Intel HWP */
 194 #define X86_FEATURE_HWP_NOITFY  ( 7*32+ 11) /* Intel HWP_NOTIFY */
 195 #define X86_FEATURE_HWP_ACT_WINDOW ( 7*32+ 12) /* Intel HWP_ACT_WINDOW */
 196 #define X86_FEATURE_HWP_EPP     ( 7*32+13) /* Intel HWP_EPP */
 197 #define X86_FEATURE_HWP_PKG_REQ ( 7*32+14) /* Intel HWP_PKG_REQ */
 198
 199 /* Virtualization flags: Linux defined, word 8 */
 200 #define X86_FEATURE_TPR_SHADOW  ( 8*32+ 0) /* Intel TPR Shadow */
 201 #define X86_FEATURE_VNMI        ( 8*32+ 1) /* Intel Virtual NMI */
 202 #define X86_FEATURE_FLEXPRIORITY ( 8*32+ 2) /* Intel FlexPriority */
 203 #define X86_FEATURE_EPT         ( 8*32+ 3) /* Intel Extended Page Table */
 204 #define X86_FEATURE_VPID        ( 8*32+ 4) /* Intel Virtual Processor ID */
 205 #define X86_FEATURE_NPT         ( 8*32+ 5) /* AMD Nested Page Table support */
 206 #define X86_FEATURE_LBRV        ( 8*32+ 6) /* AMD LBR Virtualization support */
 207 #define X86_FEATURE_SVML        ( 8*32+ 7) /* "svm_lock" AMD SVM locking MSR */
 208 #define X86_FEATURE_NRIPS       ( 8*32+ 8) /* "nrip_save" AMD SVM next_rip save */
 209 #define X86_FEATURE_TSCRATEMSR  ( 8*32+ 9) /* "tsc_scale" AMD TSC scaling support */
 210 #define X86_FEATURE_VMCBCLEAN   ( 8*32+10) /* "vmcb_clean" AMD VMCB clean bits support */
 211 #define X86_FEATURE_FLUSHBYASID ( 8*32+11) /* AMD flush-by-ASID support */
 212 #define X86_FEATURE_DECODEASSISTS ( 8*32+12) /* AMD Decode Assists support */
 213 #define X86_FEATURE_PAUSEFILTER ( 8*32+13) /* AMD filtered pause intercept */
 214 #define X86_FEATURE_PFTHRESHOLD ( 8*32+14) /* AMD pause filter threshold */
 215 #define X86_FEATURE_VMMCALL     ( 8*32+15) /* Prefer vmmcall to vmcall */
 216
 217
 218 /* Intel-defined CPU features, CPUID level 0x00000007:0 (ebx), word 9 */
 219 #define X86_FEATURE_FSGSBASE    ( 9*32+ 0) /* {RD/WR}{FS/GS}BASE instructions*/
 220 #define X86_FEATURE_TSC_ADJUST  ( 9*32+ 1) /* TSC adjustment MSR 0x3b */
 221 #define X86_FEATURE_BMI1        ( 9*32+ 3) /* 1st group bit manipulation extensions */
 222 #define X86_FEATURE_HLE         ( 9*32+ 4) /* Hardware Lock Elision */
 223 #define X86_FEATURE_AVX2        ( 9*32+ 5) /* AVX2 instructions */
 224 #define X86_FEATURE_SMEP        ( 9*32+ 7) /* Supervisor Mode Execution Protection */
 225 #define X86_FEATURE_BMI2        ( 9*32+ 8) /* 2nd group bit manipulation extensions */
 226 #define X86_FEATURE_ERMS        ( 9*32+ 9) /* Enhanced REP MOVSB/STOSB */
 227 #define X86_FEATURE_INVPCID     ( 9*32+10) /* Invalidate Processor Context ID */
 228 #define X86_FEATURE_RTM         ( 9*32+11) /* Restricted Transactional Memory */
 229 #define X86_FEATURE_MPX         ( 9*32+14) /* Memory Protection Extension */
 230 #define X86_FEATURE_AVX512F     ( 9*32+16) /* AVX-512 Foundation */
 231 #define X86_FEATURE_RDSEED      ( 9*32+18) /* The RDSEED instruction */
 232 #define X86_FEATURE_ADX         ( 9*32+19) /* The ADCX and ADOX instructions */
 233 #define X86_FEATURE_SMAP        ( 9*32+20) /* Supervisor Mode Access Prevention */
 234 #define X86_FEATURE_CLFLUSHOPT  ( 9*32+23) /* CLFLUSHOPT instruction */
 235 #define X86_FEATURE_AVX512PF    ( 9*32+26) /* AVX-512 Prefetch */
 236 #define X86_FEATURE_AVX512ER    ( 9*32+27) /* AVX-512 Exponential and Reciprocal */
 237 #define X86_FEATURE_AVX512CD    ( 9*32+28) /* AVX-512 Conflict Detection */
 238
 239 /* Extended state features, CPUID level 0x0000000d:1 (eax), word 10 */
 240 #define X86_FEATURE_XSAVEOPT    (10*32+ 0) /* XSAVEOPT */
 241 #define X86_FEATURE_XSAVEC      (10*32+ 1) /* XSAVEC */
 242 #define X86_FEATURE_XGETBV1     (10*32+ 2) /* XGETBV with ECX = 1 */
 243 #define X86_FEATURE_XSAVES      (10*32+ 3) /* XSAVES/XRSTORS */
 244
 245 /*
 246  * BUG word(s)
 247  */
 248 #define X86_BUG(x)              (NCAPINTS*32 + (x))
 249
 250 #define X86_BUG_F00F            X86_BUG(0) /* Intel F00F */
 251 #define X86_BUG_FDIV            X86_BUG(1) /* FPU FDIV */
 252 #define X86_BUG_COMA            X86_BUG(2) /* Cyrix 6x86 coma */
 253 #define X86_BUG_AMD_TLB_MMATCH  X86_BUG(3) /* "tlb_mmatch" AMD Erratum 383 */
 254 #define X86_BUG_AMD_APIC_C1E    X86_BUG(4) /* "apic_c1e" AMD Erratum 400 */
 255 #define X86_BUG_11AP            X86_BUG(5) /* Bad local APIC aka 11AP */
 256 #define X86_BUG_FXSAVE_LEAK     X86_BUG(6) /* FXSAVE leaks FOP/FIP/FOP */
 257 #define X86_BUG_CLFLUSH_MONITOR X86_BUG(7) /* AAI65, CLFLUSH required before MONITOR */
 258
 259 #if defined(__KERNEL__) && !defined(__ASSEMBLY__)
 260
 261 #include <asm/asm.h>
 262 #include <linux/bitops.h>
 263
 264 #ifdef CONFIG_X86_FEATURE_NAMES
 265 extern const char * const x86_cap_flags[NCAPINTS*32];
 266 extern const char * const x86_power_flags[32];
 267 #define X86_CAP_FMT "%s"
 268 #define x86_cap_flag(flag) x86_cap_flags[flag]
 269 #else
 270 #define X86_CAP_FMT "%d:%d"
 271 #define x86_cap_flag(flag) ((flag) >> 5), ((flag) & 31)
 272 #endif
 273
 274 /*
 275  * In order to save room, we index into this array by doing
 276  * X86_BUG_<name> - NCAPINTS*32.
 277  */
 278 extern const char * const x86_bug_flags[NBUGINTS*32];
 279
 280 #define test_cpu_cap(c, bit)                                            \
 281          test_bit(bit, (unsigned long *)((c)->x86_capability))
 282
 283 #define REQUIRED_MASK_BIT_SET(bit)                                      \
 284          ( (((bit)>>5)==0 && (1UL<<((bit)&31) & REQUIRED_MASK0)) ||     \
 285            (((bit)>>5)==1 && (1UL<<((bit)&31) & REQUIRED_MASK1)) ||     \
 286            (((bit)>>5)==2 && (1UL<<((bit)&31) & REQUIRED_MASK2)) ||     \
 287            (((bit)>>5)==3 && (1UL<<((bit)&31) & REQUIRED_MASK3)) ||     \
 288            (((bit)>>5)==4 && (1UL<<((bit)&31) & REQUIRED_MASK4)) ||     \
 289            (((bit)>>5)==5 && (1UL<<((bit)&31) & REQUIRED_MASK5)) ||     \
 290            (((bit)>>5)==6 && (1UL<<((bit)&31) & REQUIRED_MASK6)) ||     \
 291            (((bit)>>5)==7 && (1UL<<((bit)&31) & REQUIRED_MASK7)) ||     \
 292            (((bit)>>5)==8 && (1UL<<((bit)&31) & REQUIRED_MASK8)) ||     \
 293            (((bit)>>5)==9 && (1UL<<((bit)&31) & REQUIRED_MASK9)) )
 294
 295 #define DISABLED_MASK_BIT_SET(bit)                                      \
 296          ( (((bit)>>5)==0 && (1UL<<((bit)&31) & DISABLED_MASK0)) ||     \
 297            (((bit)>>5)==1 && (1UL<<((bit)&31) & DISABLED_MASK1)) ||     \
 298            (((bit)>>5)==2 && (1UL<<((bit)&31) & DISABLED_MASK2)) ||     \
 299            (((bit)>>5)==3 && (1UL<<((bit)&31) & DISABLED_MASK3)) ||     \
 300            (((bit)>>5)==4 && (1UL<<((bit)&31) & DISABLED_MASK4)) ||     \
 301            (((bit)>>5)==5 && (1UL<<((bit)&31) & DISABLED_MASK5)) ||     \
 302            (((bit)>>5)==6 && (1UL<<((bit)&31) & DISABLED_MASK6)) ||     \
 303            (((bit)>>5)==7 && (1UL<<((bit)&31) & DISABLED_MASK7)) ||     \
 304            (((bit)>>5)==8 && (1UL<<((bit)&31) & DISABLED_MASK8)) ||     \
 305            (((bit)>>5)==9 && (1UL<<((bit)&31) & DISABLED_MASK9)) )
 306
 307 #define cpu_has(c, bit)                                                 \
 308         (__builtin_constant_p(bit) && REQUIRED_MASK_BIT_SET(bit) ? 1 :  \
 309          test_cpu_cap(c, bit))
 310
 311 #define this_cpu_has(bit)                                               \
 312         (__builtin_constant_p(bit) && REQUIRED_MASK_BIT_SET(bit) ? 1 :  \
 313          x86_this_cpu_test_bit(bit, (unsigned long *)&cpu_info.x86_capability))
 314
 315 /*
 316  * This macro is for detection of features which need kernel
 317  * infrastructure to be used.  It may *not* directly test the CPU
 318  * itself.  Use the cpu_has() family if you want true runtime
 319  * testing of CPU features, like in hypervisor code where you are
 320  * supporting a possible guest feature where host support for it
 321  * is not relevant.
 322  */
 323 #define cpu_feature_enabled(bit)        \
 324         (__builtin_constant_p(bit) && DISABLED_MASK_BIT_SET(bit) ? 0 :  \
 325          cpu_has(&boot_cpu_data, bit))
 326
 327 #define boot_cpu_has(bit)       cpu_has(&boot_cpu_data, bit)
 328
 329 #define set_cpu_cap(c, bit)     set_bit(bit, (unsigned long *)((c)->x86_capability))
 330 #define clear_cpu_cap(c, bit)   clear_bit(bit, (unsigned long *)((c)->x86_capability))
 331 #define setup_clear_cpu_cap(bit) do { \
 332         clear_cpu_cap(&boot_cpu_data, bit);     \
 333         set_bit(bit, (unsigned long *)cpu_caps_cleared); \
 334 } while (0)
 335 #define setup_force_cpu_cap(bit) do { \
 336         set_cpu_cap(&boot_cpu_data, bit);       \
 337         set_bit(bit, (unsigned long *)cpu_caps_set);    \
 338 } while (0)
 339
 340 #define cpu_has_fpu             boot_cpu_has(X86_FEATURE_FPU)
 341 #define cpu_has_de              boot_cpu_has(X86_FEATURE_DE)
 342 #define cpu_has_pse             boot_cpu_has(X86_FEATURE_PSE)
 343 #define cpu_has_tsc             boot_cpu_has(X86_FEATURE_TSC)
 344 #define cpu_has_pge             boot_cpu_has(X86_FEATURE_PGE)
 345 #define cpu_has_apic            boot_cpu_has(X86_FEATURE_APIC)
 346 #define cpu_has_sep             boot_cpu_has(X86_FEATURE_SEP)
 347 #define cpu_has_mtrr            boot_cpu_has(X86_FEATURE_MTRR)
 348 #define cpu_has_mmx             boot_cpu_has(X86_FEATURE_MMX)
 349 #define cpu_has_fxsr            boot_cpu_has(X86_FEATURE_FXSR)
 350 #define cpu_has_xmm             boot_cpu_has(X86_FEATURE_XMM)
 351 #define cpu_has_xmm2            boot_cpu_has(X86_FEATURE_XMM2)
 352 #define cpu_has_xmm3            boot_cpu_has(X86_FEATURE_XMM3)
 353 #define cpu_has_ssse3           boot_cpu_has(X86_FEATURE_SSSE3)
 354 #define cpu_has_aes             boot_cpu_has(X86_FEATURE_AES)
 355 #define cpu_has_avx             boot_cpu_has(X86_FEATURE_AVX)
 356 #define cpu_has_avx2            boot_cpu_has(X86_FEATURE_AVX2)
 357 #define cpu_has_ht              boot_cpu_has(X86_FEATURE_HT)
 358 #define cpu_has_nx              boot_cpu_has(X86_FEATURE_NX)
 359 #define cpu_has_xstore          boot_cpu_has(X86_FEATURE_XSTORE)
 360 #define cpu_has_xstore_enabled  boot_cpu_has(X86_FEATURE_XSTORE_EN)
 361 #define cpu_has_xcrypt          boot_cpu_has(X86_FEATURE_XCRYPT)
 362 #define cpu_has_xcrypt_enabled  boot_cpu_has(X86_FEATURE_XCRYPT_EN)
 363 #define cpu_has_ace2            boot_cpu_has(X86_FEATURE_ACE2)
 364 #define cpu_has_ace2_enabled    boot_cpu_has(X86_FEATURE_ACE2_EN)
 365 #define cpu_has_phe             boot_cpu_has(X86_FEATURE_PHE)
 366 #define cpu_has_phe_enabled     boot_cpu_has(X86_FEATURE_PHE_EN)
 367 #define cpu_has_pmm             boot_cpu_has(X86_FEATURE_PMM)
 368 #define cpu_has_pmm_enabled     boot_cpu_has(X86_FEATURE_PMM_EN)
 369 #define cpu_has_ds              boot_cpu_has(X86_FEATURE_DS)
 370 #define cpu_has_pebs            boot_cpu_has(X86_FEATURE_PEBS)
 371 #define cpu_has_clflush         boot_cpu_has(X86_FEATURE_CLFLUSH)
 372 #define cpu_has_bts             boot_cpu_has(X86_FEATURE_BTS)
 373 #define cpu_has_gbpages         boot_cpu_has(X86_FEATURE_GBPAGES)
 374 #define cpu_has_arch_perfmon    boot_cpu_has(X86_FEATURE_ARCH_PERFMON)
 375 #define cpu_has_pat             boot_cpu_has(X86_FEATURE_PAT)
 376 #define cpu_has_xmm4_1          boot_cpu_has(X86_FEATURE_XMM4_1)
 377 #define cpu_has_xmm4_2          boot_cpu_has(X86_FEATURE_XMM4_2)
 378 #define cpu_has_x2apic          boot_cpu_has(X86_FEATURE_X2APIC)
 379 #define cpu_has_xsave           boot_cpu_has(X86_FEATURE_XSAVE)
 380 #define cpu_has_xsaveopt        boot_cpu_has(X86_FEATURE_XSAVEOPT)
 381 #define cpu_has_xsaves          boot_cpu_has(X86_FEATURE_XSAVES)
 382 #define cpu_has_osxsave         boot_cpu_has(X86_FEATURE_OSXSAVE)
 383 #define cpu_has_hypervisor      boot_cpu_has(X86_FEATURE_HYPERVISOR)
 384 #define cpu_has_pclmulqdq       boot_cpu_has(X86_FEATURE_PCLMULQDQ)
 385 #define cpu_has_perfctr_core    boot_cpu_has(X86_FEATURE_PERFCTR_CORE)
 386 #define cpu_has_perfctr_nb      boot_cpu_has(X86_FEATURE_PERFCTR_NB)
 387 #define cpu_has_perfctr_l2      boot_cpu_has(X86_FEATURE_PERFCTR_L2)
 388 #define cpu_has_cx8             boot_cpu_has(X86_FEATURE_CX8)
 389 #define cpu_has_cx16            boot_cpu_has(X86_FEATURE_CX16)
 390 #define cpu_has_eager_fpu       boot_cpu_has(X86_FEATURE_EAGER_FPU)
 391 #define cpu_has_topoext         boot_cpu_has(X86_FEATURE_TOPOEXT)
 392 #define cpu_has_bpext           boot_cpu_has(X86_FEATURE_BPEXT)
 393
 394 #if __GNUC__ >= 4
 395 extern void warn_pre_alternatives(void);
 396 extern bool __static_cpu_has_safe(u16 bit);
 397
 398 /*
 399  * Static testing of CPU features.  Used the same as boot_cpu_has().
 400  * These are only valid after alternatives have run, but will statically
 401  * patch the target code for additional performance.
 402  */
 403 static __always_inline __pure bool __static_cpu_has(u16 bit)
 404 {
 405 #ifdef CC_HAVE_ASM_GOTO
 406
 407 #ifdef CONFIG_X86_DEBUG_STATIC_CPU_HAS
 408
 409                 /*
 410                  * Catch too early usage of this before alternatives
 411                  * have run.
 412                  */
 413                 asm_volatile_goto("1: jmp %l[t_warn]\n"
 414                          "2:\n"
 415                          ".section .altinstructions,\"a\"\n"
 416                          " .long 1b - .\n"
 417                          " .long 0\n"           /* no replacement */
 418                          " .word %P0\n"         /* 1: do replace */
 419                          " .byte 2b - 1b\n"     /* source len */
 420                          " .byte 0\n"           /* replacement len */
 421                          ".previous\n"
 422                          /* skipping size check since replacement size = 0 */
 423                          : : "i" (X86_FEATURE_ALWAYS) : : t_warn);
 424
 425 #endif
 426
 427                 asm_volatile_goto("1: jmp %l[t_no]\n"
 428                          "2:\n"
 429                          ".section .altinstructions,\"a\"\n"
 430                          " .long 1b - .\n"
 431                          " .long 0\n"           /* no replacement */
 432                          " .word %P0\n"         /* feature bit */
 433                          " .byte 2b - 1b\n"     /* source len */
 434                          " .byte 0\n"           /* replacement len */
 435                          ".previous\n"
 436                          /* skipping size check since replacement size = 0 */
 437                          : : "i" (bit) : : t_no);
 438                 return true;
 439         t_no:
 440                 return false;
 441
 442 #ifdef CONFIG_X86_DEBUG_STATIC_CPU_HAS
 443         t_warn:
 444                 warn_pre_alternatives();
 445                 return false;
 446 #endif
 447
 448 #else /* CC_HAVE_ASM_GOTO */
 449
 450                 u8 flag;
 451                 /* Open-coded due to __stringify() in ALTERNATIVE() */
 452                 asm volatile("1: movb $0,%0\n"
 453                              "2:\n"
 454                              ".section .altinstructions,\"a\"\n"
 455                              " .long 1b - .\n"
 456                              " .long 3f - .\n"
 457                              " .word %P1\n"             /* feature bit */
 458                              " .byte 2b - 1b\n"         /* source len */
 459                              " .byte 4f - 3f\n"         /* replacement len */
 460                              ".previous\n"
 461                              ".section .discard,\"aw\",@progbits\n"
 462                              " .byte 0xff + (4f-3f) - (2b-1b)\n" /* size check */
 463                              ".previous\n"
 464                              ".section .altinstr_replacement,\"ax\"\n"
 465                              "3: movb $1,%0\n"
 466                              "4:\n"
 467                              ".previous\n"
 468                              : "=qm" (flag) : "i" (bit));
 469                 return flag;
 470
 471 #endif /* CC_HAVE_ASM_GOTO */
 472 }
 473
 474 #define static_cpu_has(bit)                                     \
 475 (                                                               \
 476         __builtin_constant_p(boot_cpu_has(bit)) ?               \
 477                 boot_cpu_has(bit) :                             \
 478         __builtin_constant_p(bit) ?                             \
 479                 __static_cpu_has(bit) :                         \
 480                 boot_cpu_has(bit)                               \
 481 )
 482
 483 static __always_inline __pure bool _static_cpu_has_safe(u16 bit)
 484 {
 485 #ifdef CC_HAVE_ASM_GOTO
 486 /*
 487  * We need to spell the jumps to the compiler because, depending on the offset,
 488  * the replacement jump can be bigger than the original jump, and this we cannot
 489  * have. Thus, we force the jump to the widest, 4-byte, signed relative
 490  * offset even though the last would often fit in less bytes.
 491  */
 492                 asm_volatile_goto("1: .byte 0xe9\n .long %l[t_dynamic] - 2f\n"
 493                          "2:\n"
 494                          ".section .altinstructions,\"a\"\n"
 495                          " .long 1b - .\n"              /* src offset */
 496                          " .long 3f - .\n"              /* repl offset */
 497                          " .word %P1\n"                 /* always replace */
 498                          " .byte 2b - 1b\n"             /* src len */
 499                          " .byte 4f - 3f\n"             /* repl len */
 500                          ".previous\n"
 501                          ".section .altinstr_replacement,\"ax\"\n"
 502                          "3: .byte 0xe9\n .long %l[t_no] - 2b\n"
 503                          "4:\n"
 504                          ".previous\n"
 505                          ".section .altinstructions,\"a\"\n"
 506                          " .long 1b - .\n"              /* src offset */
 507                          " .long 0\n"                   /* no replacement */
 508                          " .word %P0\n"                 /* feature bit */
 509                          " .byte 2b - 1b\n"             /* src len */
 510                          " .byte 0\n"                   /* repl len */
 511                          ".previous\n"
 512                          : : "i" (bit), "i" (X86_FEATURE_ALWAYS)
 513                          : : t_dynamic, t_no);
 514                 return true;
 515         t_no:
 516                 return false;
 517         t_dynamic:
 518                 return __static_cpu_has_safe(bit);
 519 #else
 520                 u8 flag;
 521                 /* Open-coded due to __stringify() in ALTERNATIVE() */
 522                 asm volatile("1: movb $2,%0\n"
 523                              "2:\n"
 524                              ".section .altinstructions,\"a\"\n"
 525                              " .long 1b - .\n"          /* src offset */
 526                              " .long 3f - .\n"          /* repl offset */
 527                              " .word %P2\n"             /* always replace */
 528                              " .byte 2b - 1b\n"         /* source len */
 529                              " .byte 4f - 3f\n"         /* replacement len */
 530                              ".previous\n"
 531                              ".section .discard,\"aw\",@progbits\n"
 532                              " .byte 0xff + (4f-3f) - (2b-1b)\n" /* size check */
 533                              ".previous\n"
 534                              ".section .altinstr_replacement,\"ax\"\n"
 535                              "3: movb $0,%0\n"
 536                              "4:\n"
 537                              ".previous\n"
 538                              ".section .altinstructions,\"a\"\n"
 539                              " .long 1b - .\n"          /* src offset */
 540                              " .long 5f - .\n"          /* repl offset */
 541                              " .word %P1\n"             /* feature bit */
 542                              " .byte 4b - 3b\n"         /* src len */
 543                              " .byte 6f - 5f\n"         /* repl len */
 544                              ".previous\n"
 545                              ".section .discard,\"aw\",@progbits\n"
 546                              " .byte 0xff + (6f-5f) - (4b-3b)\n" /* size check */
 547                              ".previous\n"
 548                              ".section .altinstr_replacement,\"ax\"\n"
 549                              "5: movb $1,%0\n"
 550                              "6:\n"
 551                              ".previous\n"
 552                              : "=qm" (flag)
 553                              : "i" (bit), "i" (X86_FEATURE_ALWAYS));
 554                 return (flag == 2 ? __static_cpu_has_safe(bit) : flag);
 555 #endif /* CC_HAVE_ASM_GOTO */
 556 }
 557
 558 #define static_cpu_has_safe(bit)                                \
 559 (                                                               \
 560         __builtin_constant_p(boot_cpu_has(bit)) ?               \
 561                 boot_cpu_has(bit) :                             \
 562                 _static_cpu_has_safe(bit)                       \
 563 )
 564 #else
 565 /*
 566  * gcc 3.x is too stupid to do the static test; fall back to dynamic.
 567  */
 568 #define static_cpu_has(bit)             boot_cpu_has(bit)
 569 #define static_cpu_has_safe(bit)        boot_cpu_has(bit)
 570 #endif
 571
 572 #define cpu_has_bug(c, bit)             cpu_has(c, (bit))
 573 #define set_cpu_bug(c, bit)             set_cpu_cap(c, (bit))
 574 #define clear_cpu_bug(c, bit)           clear_cpu_cap(c, (bit))
 575
 576 #define static_cpu_has_bug(bit)         static_cpu_has((bit))
 577 #define static_cpu_has_bug_safe(bit)    static_cpu_has_safe((bit))
 578 #define boot_cpu_has_bug(bit)           cpu_has_bug(&boot_cpu_data, (bit))
 579
 580 #define MAX_CPU_FEATURES                (NCAPINTS * 32)
 581 #define cpu_have_feature                boot_cpu_has
 582
 583 #define CPU_FEATURE_TYPEFMT             "x86,ven%04Xfam%04Xmod%04X"
 584 #define CPU_FEATURE_TYPEVAL             boot_cpu_data.x86_vendor, boot_cpu_data.x86, \
 585                                         boot_cpu_data.x86_model
 586
 587 #endif /* defined(__KERNEL__) && !defined(__ASSEMBLY__) */
 588 #endif /* _ASM_X86_CPUFEATURE_H */