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 #define NCAPINTS        10      /* N 32-bit words worth of info */
  12 #define NBUGINTS        1       /* N 32-bit bug flags */
  13
  14 /*
  15  * Note: If the comment begins with a quoted string, that string is used
  16  * in /proc/cpuinfo instead of the macro name.  If the string is "",
  17  * this feature bit is not displayed in /proc/cpuinfo at all.
  18  */
  19
  20 /* Intel-defined CPU features, CPUID level 0x00000001 (edx), word 0 */
  21 #define X86_FEATURE_FPU         (0*32+ 0) /* Onboard FPU */
  22 #define X86_FEATURE_VME         (0*32+ 1) /* Virtual Mode Extensions */
  23 #define X86_FEATURE_DE          (0*32+ 2) /* Debugging Extensions */
  24 #define X86_FEATURE_PSE         (0*32+ 3) /* Page Size Extensions */
  25 #define X86_FEATURE_TSC         (0*32+ 4) /* Time Stamp Counter */
  26 #define X86_FEATURE_MSR         (0*32+ 5) /* Model-Specific Registers */
  27 #define X86_FEATURE_PAE         (0*32+ 6) /* Physical Address Extensions */
  28 #define X86_FEATURE_MCE         (0*32+ 7) /* Machine Check Exception */
  29 #define X86_FEATURE_CX8         (0*32+ 8) /* CMPXCHG8 instruction */
  30 #define X86_FEATURE_APIC        (0*32+ 9) /* Onboard APIC */
  31 #define X86_FEATURE_SEP         (0*32+11) /* SYSENTER/SYSEXIT */
  32 #define X86_FEATURE_MTRR        (0*32+12) /* Memory Type Range Registers */
  33 #define X86_FEATURE_PGE         (0*32+13) /* Page Global Enable */
  34 #define X86_FEATURE_MCA         (0*32+14) /* Machine Check Architecture */
  35 #define X86_FEATURE_CMOV        (0*32+15) /* CMOV instructions */
  36                                           /* (plus FCMOVcc, FCOMI with FPU) */
  37 #define X86_FEATURE_PAT         (0*32+16) /* Page Attribute Table */
  38 #define X86_FEATURE_PSE36       (0*32+17) /* 36-bit PSEs */
  39 #define X86_FEATURE_PN          (0*32+18) /* Processor serial number */
  40 #define X86_FEATURE_CLFLSH      (0*32+19) /* "clflush" CLFLUSH instruction */
  41 #define X86_FEATURE_DS          (0*32+21) /* "dts" Debug Store */
  42 #define X86_FEATURE_ACPI        (0*32+22) /* ACPI via MSR */
  43 #define X86_FEATURE_MMX         (0*32+23) /* Multimedia Extensions */
  44 #define X86_FEATURE_FXSR        (0*32+24) /* FXSAVE/FXRSTOR, CR4.OSFXSR */
  45 #define X86_FEATURE_XMM         (0*32+25) /* "sse" */
  46 #define X86_FEATURE_XMM2        (0*32+26) /* "sse2" */
  47 #define X86_FEATURE_SELFSNOOP   (0*32+27) /* "ss" CPU self snoop */
  48 #define X86_FEATURE_HT          (0*32+28) /* Hyper-Threading */
  49 #define X86_FEATURE_ACC         (0*32+29) /* "tm" Automatic clock control */
  50 #define X86_FEATURE_IA64        (0*32+30) /* IA-64 processor */
  51 #define X86_FEATURE_PBE         (0*32+31) /* Pending Break Enable */
  52
  53 /* AMD-defined CPU features, CPUID level 0x80000001, word 1 */
  54 /* Don't duplicate feature flags which are redundant with Intel! */
  55 #define X86_FEATURE_SYSCALL     (1*32+11) /* SYSCALL/SYSRET */
  56 #define X86_FEATURE_MP          (1*32+19) /* MP Capable. */
  57 #define X86_FEATURE_NX          (1*32+20) /* Execute Disable */
  58 #define X86_FEATURE_MMXEXT      (1*32+22) /* AMD MMX extensions */
  59 #define X86_FEATURE_FXSR_OPT    (1*32+25) /* FXSAVE/FXRSTOR optimizations */
  60 #define X86_FEATURE_GBPAGES     (1*32+26) /* "pdpe1gb" GB pages */
  61 #define X86_FEATURE_RDTSCP      (1*32+27) /* RDTSCP */
  62 #define X86_FEATURE_LM          (1*32+29) /* Long Mode (x86-64) */
  63 #define X86_FEATURE_3DNOWEXT    (1*32+30) /* AMD 3DNow! extensions */
  64 #define X86_FEATURE_3DNOW       (1*32+31) /* 3DNow! */
  65
  66 /* Transmeta-defined CPU features, CPUID level 0x80860001, word 2 */
  67 #define X86_FEATURE_RECOVERY    (2*32+ 0) /* CPU in recovery mode */
  68 #define X86_FEATURE_LONGRUN     (2*32+ 1) /* Longrun power control */
  69 #define X86_FEATURE_LRTI        (2*32+ 3) /* LongRun table interface */
  70
  71 /* Other features, Linux-defined mapping, word 3 */
  72 /* This range is used for feature bits which conflict or are synthesized */
  73 #define X86_FEATURE_CXMMX       (3*32+ 0) /* Cyrix MMX extensions */
  74 #define X86_FEATURE_K6_MTRR     (3*32+ 1) /* AMD K6 nonstandard MTRRs */
  75 #define X86_FEATURE_CYRIX_ARR   (3*32+ 2) /* Cyrix ARRs (= MTRRs) */
  76 #define X86_FEATURE_CENTAUR_MCR (3*32+ 3) /* Centaur MCRs (= MTRRs) */
  77 /* cpu types for specific tunings: */
  78 #define X86_FEATURE_K8          (3*32+ 4) /* "" Opteron, Athlon64 */
  79 #define X86_FEATURE_K7          (3*32+ 5) /* "" Athlon */
  80 #define X86_FEATURE_P3          (3*32+ 6) /* "" P3 */
  81 #define X86_FEATURE_P4          (3*32+ 7) /* "" P4 */
  82 #define X86_FEATURE_CONSTANT_TSC (3*32+ 8) /* TSC ticks at a constant rate */
  83 #define X86_FEATURE_UP          (3*32+ 9) /* smp kernel running on up */
  84 #define X86_FEATURE_FXSAVE_LEAK (3*32+10) /* "" FXSAVE leaks FOP/FIP/FOP */
  85 #define X86_FEATURE_ARCH_PERFMON (3*32+11) /* Intel Architectural PerfMon */
  86 #define X86_FEATURE_PEBS        (3*32+12) /* Precise-Event Based Sampling */
  87 #define X86_FEATURE_BTS         (3*32+13) /* Branch Trace Store */
  88 #define X86_FEATURE_SYSCALL32   (3*32+14) /* "" syscall in ia32 userspace */
  89 #define X86_FEATURE_SYSENTER32  (3*32+15) /* "" sysenter in ia32 userspace */
  90 #define X86_FEATURE_REP_GOOD    (3*32+16) /* rep microcode works well */
  91 #define X86_FEATURE_MFENCE_RDTSC (3*32+17) /* "" Mfence synchronizes RDTSC */
  92 #define X86_FEATURE_LFENCE_RDTSC (3*32+18) /* "" Lfence synchronizes RDTSC */
  93 #define X86_FEATURE_11AP        (3*32+19) /* "" Bad local APIC aka 11AP */
  94 #define X86_FEATURE_NOPL        (3*32+20) /* The NOPL (0F 1F) instructions */
  95 #define X86_FEATURE_ALWAYS      (3*32+21) /* "" Always-present feature */
  96 #define X86_FEATURE_XTOPOLOGY   (3*32+22) /* cpu topology enum extensions */
  97 #define X86_FEATURE_TSC_RELIABLE (3*32+23) /* TSC is known to be reliable */
  98 #define X86_FEATURE_NONSTOP_TSC (3*32+24) /* TSC does not stop in C states */
  99 #define X86_FEATURE_CLFLUSH_MONITOR (3*32+25) /* "" clflush reqd with monitor */
 100 #define X86_FEATURE_EXTD_APICID (3*32+26) /* has extended APICID (8 bits) */
 101 #define X86_FEATURE_AMD_DCM     (3*32+27) /* multi-node processor */
 102 #define X86_FEATURE_APERFMPERF  (3*32+28) /* APERFMPERF */
 103 #define X86_FEATURE_EAGER_FPU   (3*32+29) /* "eagerfpu" Non lazy FPU restore */
 104 #define X86_FEATURE_NONSTOP_TSC_S3 (3*32+30) /* TSC doesn't stop in S3 state */
 105
 106 /* Intel-defined CPU features, CPUID level 0x00000001 (ecx), word 4 */
 107 #define X86_FEATURE_XMM3        (4*32+ 0) /* "pni" SSE-3 */
 108 #define X86_FEATURE_PCLMULQDQ   (4*32+ 1) /* PCLMULQDQ instruction */
 109 #define X86_FEATURE_DTES64      (4*32+ 2) /* 64-bit Debug Store */
 110 #define X86_FEATURE_MWAIT       (4*32+ 3) /* "monitor" Monitor/Mwait support */
 111 #define X86_FEATURE_DSCPL       (4*32+ 4) /* "ds_cpl" CPL Qual. Debug Store */
 112 #define X86_FEATURE_VMX         (4*32+ 5) /* Hardware virtualization */
 113 #define X86_FEATURE_SMX         (4*32+ 6) /* Safer mode */
 114 #define X86_FEATURE_EST         (4*32+ 7) /* Enhanced SpeedStep */
 115 #define X86_FEATURE_TM2         (4*32+ 8) /* Thermal Monitor 2 */
 116 #define X86_FEATURE_SSSE3       (4*32+ 9) /* Supplemental SSE-3 */
 117 #define X86_FEATURE_CID         (4*32+10) /* Context ID */
 118 #define X86_FEATURE_FMA         (4*32+12) /* Fused multiply-add */
 119 #define X86_FEATURE_CX16        (4*32+13) /* CMPXCHG16B */
 120 #define X86_FEATURE_XTPR        (4*32+14) /* Send Task Priority Messages */
 121 #define X86_FEATURE_PDCM        (4*32+15) /* Performance Capabilities */
 122 #define X86_FEATURE_PCID        (4*32+17) /* Process Context Identifiers */
 123 #define X86_FEATURE_DCA         (4*32+18) /* 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 */
 127 #define X86_FEATURE_MOVBE       (4*32+22) /* MOVBE instruction */
 128 #define X86_FEATURE_POPCNT      (4*32+23) /* POPCNT instruction */
 129 #define X86_FEATURE_TSC_DEADLINE_TIMER  (4*32+24) /* Tsc deadline timer */
 130 #define X86_FEATURE_AES         (4*32+25) /* AES instructions */
 131 #define X86_FEATURE_XSAVE       (4*32+26) /* XSAVE/XRSTOR/XSETBV/XGETBV */
 132 #define X86_FEATURE_OSXSAVE     (4*32+27) /* "" XSAVE enabled in the OS */
 133 #define X86_FEATURE_AVX         (4*32+28) /* Advanced Vector Extensions */
 134 #define X86_FEATURE_F16C        (4*32+29) /* 16-bit fp conversions */
 135 #define X86_FEATURE_RDRAND      (4*32+30) /* The RDRAND instruction */
 136 #define X86_FEATURE_HYPERVISOR  (4*32+31) /* 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) /* Advanced Cryptography Engine v2 */
 144 #define X86_FEATURE_ACE2_EN     (5*32+ 9) /* ACE v2 enabled */
 145 #define X86_FEATURE_PHE         (5*32+10) /* PadLock Hash Engine */
 146 #define X86_FEATURE_PHE_EN      (5*32+11) /* PHE enabled */
 147 #define X86_FEATURE_PMM         (5*32+12) /* PadLock Montgomery Multiplier */
 148 #define X86_FEATURE_PMM_EN      (5*32+13) /* PMM enabled */
 149
 150 /* More extended AMD flags: CPUID level 0x80000001, ecx, word 6 */
 151 #define X86_FEATURE_LAHF_LM     (6*32+ 0) /* LAHF/SAHF in long mode */
 152 #define X86_FEATURE_CMP_LEGACY  (6*32+ 1) /* If yes HyperThreading not valid */
 153 #define X86_FEATURE_SVM         (6*32+ 2) /* Secure virtual machine */
 154 #define X86_FEATURE_EXTAPIC     (6*32+ 3) /* Extended APIC space */
 155 #define X86_FEATURE_CR8_LEGACY  (6*32+ 4) /* CR8 in 32-bit mode */
 156 #define X86_FEATURE_ABM         (6*32+ 5) /* Advanced bit manipulation */
 157 #define X86_FEATURE_SSE4A       (6*32+ 6) /* SSE-4A */
 158 #define X86_FEATURE_MISALIGNSSE (6*32+ 7) /* Misaligned SSE mode */
 159 #define X86_FEATURE_3DNOWPREFETCH (6*32+ 8) /* 3DNow prefetch instructions */
 160 #define X86_FEATURE_OSVW        (6*32+ 9) /* OS Visible Workaround */
 161 #define X86_FEATURE_IBS         (6*32+10) /* Instruction Based Sampling */
 162 #define X86_FEATURE_XOP         (6*32+11) /* extended AVX instructions */
 163 #define X86_FEATURE_SKINIT      (6*32+12) /* SKINIT/STGI instructions */
 164 #define X86_FEATURE_WDT         (6*32+13) /* Watchdog timer */
 165 #define X86_FEATURE_LWP         (6*32+15) /* Light Weight Profiling */
 166 #define X86_FEATURE_FMA4        (6*32+16) /* 4 operands MAC instructions */
 167 #define X86_FEATURE_TCE         (6*32+17) /* translation cache extension */
 168 #define X86_FEATURE_NODEID_MSR  (6*32+19) /* NodeId MSR */
 169 #define X86_FEATURE_TBM         (6*32+21) /* trailing bit manipulations */
 170 #define X86_FEATURE_TOPOEXT     (6*32+22) /* topology extensions CPUID leafs */
 171 #define X86_FEATURE_PERFCTR_CORE (6*32+23) /* core performance counter extensions */
 172 #define X86_FEATURE_PERFCTR_NB  (6*32+24) /* NB performance counter extensions */
 173 #define X86_FEATURE_PERFCTR_L2  (6*32+28) /* L2 performance counter extensions */
 174
 175 /*
 176  * Auxiliary flags: Linux defined - For features scattered in various
 177  * CPUID levels like 0x6, 0xA etc, word 7
 178  */
 179 #define X86_FEATURE_IDA         (7*32+ 0) /* Intel Dynamic Acceleration */
 180 #define X86_FEATURE_ARAT        (7*32+ 1) /* Always Running APIC Timer */
 181 #define X86_FEATURE_CPB         (7*32+ 2) /* AMD Core Performance Boost */
 182 #define X86_FEATURE_EPB         (7*32+ 3) /* IA32_ENERGY_PERF_BIAS support */
 183 #define X86_FEATURE_XSAVEOPT    (7*32+ 4) /* Optimized Xsave */
 184 #define X86_FEATURE_PLN         (7*32+ 5) /* Intel Power Limit Notification */
 185 #define X86_FEATURE_PTS         (7*32+ 6) /* Intel Package Thermal Status */
 186 #define X86_FEATURE_DTHERM      (7*32+ 7) /* Digital Thermal Sensor */
 187 #define X86_FEATURE_HW_PSTATE   (7*32+ 8) /* AMD HW-PState */
 188 #define X86_FEATURE_PROC_FEEDBACK (7*32+ 9) /* AMD ProcFeedbackInterface */
 189
 190 /* Virtualization flags: Linux defined, word 8 */
 191 #define X86_FEATURE_TPR_SHADOW  (8*32+ 0) /* Intel TPR Shadow */
 192 #define X86_FEATURE_VNMI        (8*32+ 1) /* Intel Virtual NMI */
 193 #define X86_FEATURE_FLEXPRIORITY (8*32+ 2) /* Intel FlexPriority */
 194 #define X86_FEATURE_EPT         (8*32+ 3) /* Intel Extended Page Table */
 195 #define X86_FEATURE_VPID        (8*32+ 4) /* Intel Virtual Processor ID */
 196 #define X86_FEATURE_NPT         (8*32+ 5) /* AMD Nested Page Table support */
 197 #define X86_FEATURE_LBRV        (8*32+ 6) /* AMD LBR Virtualization support */
 198 #define X86_FEATURE_SVML        (8*32+ 7) /* "svm_lock" AMD SVM locking MSR */
 199 #define X86_FEATURE_NRIPS       (8*32+ 8) /* "nrip_save" AMD SVM next_rip save */
 200 #define X86_FEATURE_TSCRATEMSR  (8*32+ 9) /* "tsc_scale" AMD TSC scaling support */
 201 #define X86_FEATURE_VMCBCLEAN   (8*32+10) /* "vmcb_clean" AMD VMCB clean bits support */
 202 #define X86_FEATURE_FLUSHBYASID (8*32+11) /* AMD flush-by-ASID support */
 203 #define X86_FEATURE_DECODEASSISTS (8*32+12) /* AMD Decode Assists support */
 204 #define X86_FEATURE_PAUSEFILTER (8*32+13) /* AMD filtered pause intercept */
 205 #define X86_FEATURE_PFTHRESHOLD (8*32+14) /* AMD pause filter threshold */
 206
 207
 208 /* Intel-defined CPU features, CPUID level 0x00000007:0 (ebx), word 9 */
 209 #define X86_FEATURE_FSGSBASE    (9*32+ 0) /* {RD/WR}{FS/GS}BASE instructions*/
 210 #define X86_FEATURE_TSC_ADJUST  (9*32+ 1) /* TSC adjustment MSR 0x3b */
 211 #define X86_FEATURE_BMI1        (9*32+ 3) /* 1st group bit manipulation extensions */
 212 #define X86_FEATURE_HLE         (9*32+ 4) /* Hardware Lock Elision */
 213 #define X86_FEATURE_AVX2        (9*32+ 5) /* AVX2 instructions */
 214 #define X86_FEATURE_SMEP        (9*32+ 7) /* Supervisor Mode Execution Protection */
 215 #define X86_FEATURE_BMI2        (9*32+ 8) /* 2nd group bit manipulation extensions */
 216 #define X86_FEATURE_ERMS        (9*32+ 9) /* Enhanced REP MOVSB/STOSB */
 217 #define X86_FEATURE_INVPCID     (9*32+10) /* Invalidate Processor Context ID */
 218 #define X86_FEATURE_RTM         (9*32+11) /* Restricted Transactional Memory */
 219 #define X86_FEATURE_RDSEED      (9*32+18) /* The RDSEED instruction */
 220 #define X86_FEATURE_ADX         (9*32+19) /* The ADCX and ADOX instructions */
 221 #define X86_FEATURE_SMAP        (9*32+20) /* Supervisor Mode Access Prevention */
 222
 223 /*
 224  * BUG word(s)
 225  */
 226 #define X86_BUG(x)              (NCAPINTS*32 + (x))
 227
 228 #define X86_BUG_F00F            X86_BUG(0) /* Intel F00F */
 229 #define X86_BUG_FDIV            X86_BUG(1) /* FPU FDIV */
 230 #define X86_BUG_COMA            X86_BUG(2) /* Cyrix 6x86 coma */
 231 #define X86_BUG_AMD_TLB_MMATCH  X86_BUG(3) /* AMD Erratum 383 */
 232 #define X86_BUG_AMD_APIC_C1E    X86_BUG(4) /* AMD Erratum 400 */
 233
 234 #if defined(__KERNEL__) && !defined(__ASSEMBLY__)
 235
 236 #include <asm/asm.h>
 237 #include <linux/bitops.h>
 238
 239 extern const char * const x86_cap_flags[NCAPINTS*32];
 240 extern const char * const x86_power_flags[32];
 241
 242 #define test_cpu_cap(c, bit)                                            \
 243          test_bit(bit, (unsigned long *)((c)->x86_capability))
 244
 245 #define REQUIRED_MASK_BIT_SET(bit)                                      \
 246          ( (((bit)>>5)==0 && (1UL<<((bit)&31) & REQUIRED_MASK0)) ||     \
 247            (((bit)>>5)==1 && (1UL<<((bit)&31) & REQUIRED_MASK1)) ||     \
 248            (((bit)>>5)==2 && (1UL<<((bit)&31) & REQUIRED_MASK2)) ||     \
 249            (((bit)>>5)==3 && (1UL<<((bit)&31) & REQUIRED_MASK3)) ||     \
 250            (((bit)>>5)==4 && (1UL<<((bit)&31) & REQUIRED_MASK4)) ||     \
 251            (((bit)>>5)==5 && (1UL<<((bit)&31) & REQUIRED_MASK5)) ||     \
 252            (((bit)>>5)==6 && (1UL<<((bit)&31) & REQUIRED_MASK6)) ||     \
 253            (((bit)>>5)==7 && (1UL<<((bit)&31) & REQUIRED_MASK7)) ||     \
 254            (((bit)>>5)==8 && (1UL<<((bit)&31) & REQUIRED_MASK8)) ||     \
 255            (((bit)>>5)==9 && (1UL<<((bit)&31) & REQUIRED_MASK9)) )
 256
 257 #define cpu_has(c, bit)                                                 \
 258         (__builtin_constant_p(bit) && REQUIRED_MASK_BIT_SET(bit) ? 1 :  \
 259          test_cpu_cap(c, bit))
 260
 261 #define this_cpu_has(bit)                                               \
 262         (__builtin_constant_p(bit) && REQUIRED_MASK_BIT_SET(bit) ? 1 :  \
 263          x86_this_cpu_test_bit(bit, (unsigned long *)&cpu_info.x86_capability))
 264
 265 #define boot_cpu_has(bit)       cpu_has(&boot_cpu_data, bit)
 266
 267 #define set_cpu_cap(c, bit)     set_bit(bit, (unsigned long *)((c)->x86_capability))
 268 #define clear_cpu_cap(c, bit)   clear_bit(bit, (unsigned long *)((c)->x86_capability))
 269 #define setup_clear_cpu_cap(bit) do { \
 270         clear_cpu_cap(&boot_cpu_data, bit);     \
 271         set_bit(bit, (unsigned long *)cpu_caps_cleared); \
 272 } while (0)
 273 #define setup_force_cpu_cap(bit) do { \
 274         set_cpu_cap(&boot_cpu_data, bit);       \
 275         set_bit(bit, (unsigned long *)cpu_caps_set);    \
 276 } while (0)
 277
 278 #define cpu_has_fpu             boot_cpu_has(X86_FEATURE_FPU)
 279 #define cpu_has_vme             boot_cpu_has(X86_FEATURE_VME)
 280 #define cpu_has_de              boot_cpu_has(X86_FEATURE_DE)
 281 #define cpu_has_pse             boot_cpu_has(X86_FEATURE_PSE)
 282 #define cpu_has_tsc             boot_cpu_has(X86_FEATURE_TSC)
 283 #define cpu_has_pae             boot_cpu_has(X86_FEATURE_PAE)
 284 #define cpu_has_pge             boot_cpu_has(X86_FEATURE_PGE)
 285 #define cpu_has_apic            boot_cpu_has(X86_FEATURE_APIC)
 286 #define cpu_has_sep             boot_cpu_has(X86_FEATURE_SEP)
 287 #define cpu_has_mtrr            boot_cpu_has(X86_FEATURE_MTRR)
 288 #define cpu_has_mmx             boot_cpu_has(X86_FEATURE_MMX)
 289 #define cpu_has_fxsr            boot_cpu_has(X86_FEATURE_FXSR)
 290 #define cpu_has_xmm             boot_cpu_has(X86_FEATURE_XMM)
 291 #define cpu_has_xmm2            boot_cpu_has(X86_FEATURE_XMM2)
 292 #define cpu_has_xmm3            boot_cpu_has(X86_FEATURE_XMM3)
 293 #define cpu_has_ssse3           boot_cpu_has(X86_FEATURE_SSSE3)
 294 #define cpu_has_aes             boot_cpu_has(X86_FEATURE_AES)
 295 #define cpu_has_avx             boot_cpu_has(X86_FEATURE_AVX)
 296 #define cpu_has_avx2            boot_cpu_has(X86_FEATURE_AVX2)
 297 #define cpu_has_ht              boot_cpu_has(X86_FEATURE_HT)
 298 #define cpu_has_mp              boot_cpu_has(X86_FEATURE_MP)
 299 #define cpu_has_nx              boot_cpu_has(X86_FEATURE_NX)
 300 #define cpu_has_k6_mtrr         boot_cpu_has(X86_FEATURE_K6_MTRR)
 301 #define cpu_has_cyrix_arr       boot_cpu_has(X86_FEATURE_CYRIX_ARR)
 302 #define cpu_has_centaur_mcr     boot_cpu_has(X86_FEATURE_CENTAUR_MCR)
 303 #define cpu_has_xstore          boot_cpu_has(X86_FEATURE_XSTORE)
 304 #define cpu_has_xstore_enabled  boot_cpu_has(X86_FEATURE_XSTORE_EN)
 305 #define cpu_has_xcrypt          boot_cpu_has(X86_FEATURE_XCRYPT)
 306 #define cpu_has_xcrypt_enabled  boot_cpu_has(X86_FEATURE_XCRYPT_EN)
 307 #define cpu_has_ace2            boot_cpu_has(X86_FEATURE_ACE2)
 308 #define cpu_has_ace2_enabled    boot_cpu_has(X86_FEATURE_ACE2_EN)
 309 #define cpu_has_phe             boot_cpu_has(X86_FEATURE_PHE)
 310 #define cpu_has_phe_enabled     boot_cpu_has(X86_FEATURE_PHE_EN)
 311 #define cpu_has_pmm             boot_cpu_has(X86_FEATURE_PMM)
 312 #define cpu_has_pmm_enabled     boot_cpu_has(X86_FEATURE_PMM_EN)
 313 #define cpu_has_ds              boot_cpu_has(X86_FEATURE_DS)
 314 #define cpu_has_pebs            boot_cpu_has(X86_FEATURE_PEBS)
 315 #define cpu_has_clflush         boot_cpu_has(X86_FEATURE_CLFLSH)
 316 #define cpu_has_bts             boot_cpu_has(X86_FEATURE_BTS)
 317 #define cpu_has_gbpages         boot_cpu_has(X86_FEATURE_GBPAGES)
 318 #define cpu_has_arch_perfmon    boot_cpu_has(X86_FEATURE_ARCH_PERFMON)
 319 #define cpu_has_pat             boot_cpu_has(X86_FEATURE_PAT)
 320 #define cpu_has_xmm4_1          boot_cpu_has(X86_FEATURE_XMM4_1)
 321 #define cpu_has_xmm4_2          boot_cpu_has(X86_FEATURE_XMM4_2)
 322 #define cpu_has_x2apic          boot_cpu_has(X86_FEATURE_X2APIC)
 323 #define cpu_has_xsave           boot_cpu_has(X86_FEATURE_XSAVE)
 324 #define cpu_has_xsaveopt        boot_cpu_has(X86_FEATURE_XSAVEOPT)
 325 #define cpu_has_osxsave         boot_cpu_has(X86_FEATURE_OSXSAVE)
 326 #define cpu_has_hypervisor      boot_cpu_has(X86_FEATURE_HYPERVISOR)
 327 #define cpu_has_pclmulqdq       boot_cpu_has(X86_FEATURE_PCLMULQDQ)
 328 #define cpu_has_perfctr_core    boot_cpu_has(X86_FEATURE_PERFCTR_CORE)
 329 #define cpu_has_perfctr_nb      boot_cpu_has(X86_FEATURE_PERFCTR_NB)
 330 #define cpu_has_perfctr_l2      boot_cpu_has(X86_FEATURE_PERFCTR_L2)
 331 #define cpu_has_cx8             boot_cpu_has(X86_FEATURE_CX8)
 332 #define cpu_has_cx16            boot_cpu_has(X86_FEATURE_CX16)
 333 #define cpu_has_eager_fpu       boot_cpu_has(X86_FEATURE_EAGER_FPU)
 334 #define cpu_has_topoext         boot_cpu_has(X86_FEATURE_TOPOEXT)
 335
 336 #ifdef CONFIG_X86_64
 337
 338 #undef  cpu_has_vme
 339 #define cpu_has_vme             0
 340
 341 #undef  cpu_has_pae
 342 #define cpu_has_pae             ___BUG___
 343
 344 #undef  cpu_has_mp
 345 #define cpu_has_mp              1
 346
 347 #undef  cpu_has_k6_mtrr
 348 #define cpu_has_k6_mtrr         0
 349
 350 #undef  cpu_has_cyrix_arr
 351 #define cpu_has_cyrix_arr       0
 352
 353 #undef  cpu_has_centaur_mcr
 354 #define cpu_has_centaur_mcr     0
 355
 356 #endif /* CONFIG_X86_64 */
 357
 358 #if __GNUC__ >= 4
 359 extern void warn_pre_alternatives(void);
 360 extern bool __static_cpu_has_safe(u16 bit);
 361
 362 /*
 363  * Static testing of CPU features.  Used the same as boot_cpu_has().
 364  * These are only valid after alternatives have run, but will statically
 365  * patch the target code for additional performance.
 366  */
 367 static __always_inline __pure bool __static_cpu_has(u16 bit)
 368 {
 369 #ifdef CC_HAVE_ASM_GOTO
 370
 371 #ifdef CONFIG_X86_DEBUG_STATIC_CPU_HAS
 372
 373                 /*
 374                  * Catch too early usage of this before alternatives
 375                  * have run.
 376                  */
 377                 asm_volatile_goto("1: jmp %l[t_warn]\n"
 378                          "2:\n"
 379                          ".section .altinstructions,\"a\"\n"
 380                          " .long 1b - .\n"
 381                          " .long 0\n"           /* no replacement */
 382                          " .word %P0\n"         /* 1: do replace */
 383                          " .byte 2b - 1b\n"     /* source len */
 384                          " .byte 0\n"           /* replacement len */
 385                          ".previous\n"
 386                          /* skipping size check since replacement size = 0 */
 387                          : : "i" (X86_FEATURE_ALWAYS) : : t_warn);
 388
 389 #endif
 390
 391                 asm_volatile_goto("1: jmp %l[t_no]\n"
 392                          "2:\n"
 393                          ".section .altinstructions,\"a\"\n"
 394                          " .long 1b - .\n"
 395                          " .long 0\n"           /* no replacement */
 396                          " .word %P0\n"         /* feature bit */
 397                          " .byte 2b - 1b\n"     /* source len */
 398                          " .byte 0\n"           /* replacement len */
 399                          ".previous\n"
 400                          /* skipping size check since replacement size = 0 */
 401                          : : "i" (bit) : : t_no);
 402                 return true;
 403         t_no:
 404                 return false;
 405
 406 #ifdef CONFIG_X86_DEBUG_STATIC_CPU_HAS
 407         t_warn:
 408                 warn_pre_alternatives();
 409                 return false;
 410 #endif
 411
 412 #else /* CC_HAVE_ASM_GOTO */
 413
 414                 u8 flag;
 415                 /* Open-coded due to __stringify() in ALTERNATIVE() */
 416                 asm volatile("1: movb $0,%0\n"
 417                              "2:\n"
 418                              ".section .altinstructions,\"a\"\n"
 419                              " .long 1b - .\n"
 420                              " .long 3f - .\n"
 421                              " .word %P1\n"             /* feature bit */
 422                              " .byte 2b - 1b\n"         /* source len */
 423                              " .byte 4f - 3f\n"         /* replacement len */
 424                              ".previous\n"
 425                              ".section .discard,\"aw\",@progbits\n"
 426                              " .byte 0xff + (4f-3f) - (2b-1b)\n" /* size check */
 427                              ".previous\n"
 428                              ".section .altinstr_replacement,\"ax\"\n"
 429                              "3: movb $1,%0\n"
 430                              "4:\n"
 431                              ".previous\n"
 432                              : "=qm" (flag) : "i" (bit));
 433                 return flag;
 434
 435 #endif /* CC_HAVE_ASM_GOTO */
 436 }
 437
 438 #define static_cpu_has(bit)                                     \
 439 (                                                               \
 440         __builtin_constant_p(boot_cpu_has(bit)) ?               \
 441                 boot_cpu_has(bit) :                             \
 442         __builtin_constant_p(bit) ?                             \
 443                 __static_cpu_has(bit) :                         \
 444                 boot_cpu_has(bit)                               \
 445 )
 446
 447 static __always_inline __pure bool _static_cpu_has_safe(u16 bit)
 448 {
 449 #ifdef CC_HAVE_ASM_GOTO
 450 /*
 451  * We need to spell the jumps to the compiler because, depending on the offset,
 452  * the replacement jump can be bigger than the original jump, and this we cannot
 453  * have. Thus, we force the jump to the widest, 4-byte, signed relative
 454  * offset even though the last would often fit in less bytes.
 455  */
 456                 asm_volatile_goto("1: .byte 0xe9\n .long %l[t_dynamic] - 2f\n"
 457                          "2:\n"
 458                          ".section .altinstructions,\"a\"\n"
 459                          " .long 1b - .\n"              /* src offset */
 460                          " .long 3f - .\n"              /* repl offset */
 461                          " .word %P1\n"                 /* always replace */
 462                          " .byte 2b - 1b\n"             /* src len */
 463                          " .byte 4f - 3f\n"             /* repl len */
 464                          ".previous\n"
 465                          ".section .altinstr_replacement,\"ax\"\n"
 466                          "3: .byte 0xe9\n .long %l[t_no] - 2b\n"
 467                          "4:\n"
 468                          ".previous\n"
 469                          ".section .altinstructions,\"a\"\n"
 470                          " .long 1b - .\n"              /* src offset */
 471                          " .long 0\n"                   /* no replacement */
 472                          " .word %P0\n"                 /* feature bit */
 473                          " .byte 2b - 1b\n"             /* src len */
 474                          " .byte 0\n"                   /* repl len */
 475                          ".previous\n"
 476                          : : "i" (bit), "i" (X86_FEATURE_ALWAYS)
 477                          : : t_dynamic, t_no);
 478                 return true;
 479         t_no:
 480                 return false;
 481         t_dynamic:
 482                 return __static_cpu_has_safe(bit);
 483 #else
 484                 u8 flag;
 485                 /* Open-coded due to __stringify() in ALTERNATIVE() */
 486                 asm volatile("1: movb $2,%0\n"
 487                              "2:\n"
 488                              ".section .altinstructions,\"a\"\n"
 489                              " .long 1b - .\n"          /* src offset */
 490                              " .long 3f - .\n"          /* repl offset */
 491                              " .word %P2\n"             /* always replace */
 492                              " .byte 2b - 1b\n"         /* source len */
 493                              " .byte 4f - 3f\n"         /* replacement len */
 494                              ".previous\n"
 495                              ".section .discard,\"aw\",@progbits\n"
 496                              " .byte 0xff + (4f-3f) - (2b-1b)\n" /* size check */
 497                              ".previous\n"
 498                              ".section .altinstr_replacement,\"ax\"\n"
 499                              "3: movb $0,%0\n"
 500                              "4:\n"
 501                              ".previous\n"
 502                              ".section .altinstructions,\"a\"\n"
 503                              " .long 1b - .\n"          /* src offset */
 504                              " .long 5f - .\n"          /* repl offset */
 505                              " .word %P1\n"             /* feature bit */
 506                              " .byte 4b - 3b\n"         /* src len */
 507                              " .byte 6f - 5f\n"         /* repl len */
 508                              ".previous\n"
 509                              ".section .discard,\"aw\",@progbits\n"
 510                              " .byte 0xff + (6f-5f) - (4b-3b)\n" /* size check */
 511                              ".previous\n"
 512                              ".section .altinstr_replacement,\"ax\"\n"
 513                              "5: movb $1,%0\n"
 514                              "6:\n"
 515                              ".previous\n"
 516                              : "=qm" (flag)
 517                              : "i" (bit), "i" (X86_FEATURE_ALWAYS));
 518                 return (flag == 2 ? __static_cpu_has_safe(bit) : flag);
 519 #endif /* CC_HAVE_ASM_GOTO */
 520 }
 521
 522 #define static_cpu_has_safe(bit)                                \
 523 (                                                               \
 524         __builtin_constant_p(boot_cpu_has(bit)) ?               \
 525                 boot_cpu_has(bit) :                             \
 526                 _static_cpu_has_safe(bit)                       \
 527 )
 528 #else
 529 /*
 530  * gcc 3.x is too stupid to do the static test; fall back to dynamic.
 531  */
 532 #define static_cpu_has(bit)             boot_cpu_has(bit)
 533 #define static_cpu_has_safe(bit)        boot_cpu_has(bit)
 534 #endif
 535
 536 #define cpu_has_bug(c, bit)     cpu_has(c, (bit))
 537 #define set_cpu_bug(c, bit)     set_cpu_cap(c, (bit))
 538 #define clear_cpu_bug(c, bit)   clear_cpu_cap(c, (bit));
 539
 540 #define static_cpu_has_bug(bit) static_cpu_has((bit))
 541 #define boot_cpu_has_bug(bit)   cpu_has_bug(&boot_cpu_data, (bit))
 542
 543 #endif /* defined(__KERNEL__) && !defined(__ASSEMBLY__) */
 544
 545 #endif /* _ASM_X86_CPUFEATURE_H */