cpufeature.h 19 KB

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  1. /*
  2. * Defines x86 CPU feature bits
  3. */
  4. #ifndef _ASM_X86_CPUFEATURE_H
  5. #define _ASM_X86_CPUFEATURE_H
  6. #ifndef _ASM_X86_REQUIRED_FEATURES_H
  7. #include <asm/required-features.h>
  8. #endif
  9. #define NCAPINTS 10 /* N 32-bit words worth of info */
  10. /*
  11. * Note: If the comment begins with a quoted string, that string is used
  12. * in /proc/cpuinfo instead of the macro name. If the string is "",
  13. * this feature bit is not displayed in /proc/cpuinfo at all.
  14. */
  15. /* Intel-defined CPU features, CPUID level 0x00000001 (edx), word 0 */
  16. #define X86_FEATURE_FPU (0*32+ 0) /* Onboard FPU */
  17. #define X86_FEATURE_VME (0*32+ 1) /* Virtual Mode Extensions */
  18. #define X86_FEATURE_DE (0*32+ 2) /* Debugging Extensions */
  19. #define X86_FEATURE_PSE (0*32+ 3) /* Page Size Extensions */
  20. #define X86_FEATURE_TSC (0*32+ 4) /* Time Stamp Counter */
  21. #define X86_FEATURE_MSR (0*32+ 5) /* Model-Specific Registers */
  22. #define X86_FEATURE_PAE (0*32+ 6) /* Physical Address Extensions */
  23. #define X86_FEATURE_MCE (0*32+ 7) /* Machine Check Exception */
  24. #define X86_FEATURE_CX8 (0*32+ 8) /* CMPXCHG8 instruction */
  25. #define X86_FEATURE_APIC (0*32+ 9) /* Onboard APIC */
  26. #define X86_FEATURE_SEP (0*32+11) /* SYSENTER/SYSEXIT */
  27. #define X86_FEATURE_MTRR (0*32+12) /* Memory Type Range Registers */
  28. #define X86_FEATURE_PGE (0*32+13) /* Page Global Enable */
  29. #define X86_FEATURE_MCA (0*32+14) /* Machine Check Architecture */
  30. #define X86_FEATURE_CMOV (0*32+15) /* CMOV instructions */
  31. /* (plus FCMOVcc, FCOMI with FPU) */
  32. #define X86_FEATURE_PAT (0*32+16) /* Page Attribute Table */
  33. #define X86_FEATURE_PSE36 (0*32+17) /* 36-bit PSEs */
  34. #define X86_FEATURE_PN (0*32+18) /* Processor serial number */
  35. #define X86_FEATURE_CLFLSH (0*32+19) /* "clflush" CLFLUSH instruction */
  36. #define X86_FEATURE_DS (0*32+21) /* "dts" Debug Store */
  37. #define X86_FEATURE_ACPI (0*32+22) /* ACPI via MSR */
  38. #define X86_FEATURE_MMX (0*32+23) /* Multimedia Extensions */
  39. #define X86_FEATURE_FXSR (0*32+24) /* FXSAVE/FXRSTOR, CR4.OSFXSR */
  40. #define X86_FEATURE_XMM (0*32+25) /* "sse" */
  41. #define X86_FEATURE_XMM2 (0*32+26) /* "sse2" */
  42. #define X86_FEATURE_SELFSNOOP (0*32+27) /* "ss" CPU self snoop */
  43. #define X86_FEATURE_HT (0*32+28) /* Hyper-Threading */
  44. #define X86_FEATURE_ACC (0*32+29) /* "tm" Automatic clock control */
  45. #define X86_FEATURE_IA64 (0*32+30) /* IA-64 processor */
  46. #define X86_FEATURE_PBE (0*32+31) /* Pending Break Enable */
  47. /* AMD-defined CPU features, CPUID level 0x80000001, word 1 */
  48. /* Don't duplicate feature flags which are redundant with Intel! */
  49. #define X86_FEATURE_SYSCALL (1*32+11) /* SYSCALL/SYSRET */
  50. #define X86_FEATURE_MP (1*32+19) /* MP Capable. */
  51. #define X86_FEATURE_NX (1*32+20) /* Execute Disable */
  52. #define X86_FEATURE_MMXEXT (1*32+22) /* AMD MMX extensions */
  53. #define X86_FEATURE_FXSR_OPT (1*32+25) /* FXSAVE/FXRSTOR optimizations */
  54. #define X86_FEATURE_GBPAGES (1*32+26) /* "pdpe1gb" GB pages */
  55. #define X86_FEATURE_RDTSCP (1*32+27) /* RDTSCP */
  56. #define X86_FEATURE_LM (1*32+29) /* Long Mode (x86-64) */
  57. #define X86_FEATURE_3DNOWEXT (1*32+30) /* AMD 3DNow! extensions */
  58. #define X86_FEATURE_3DNOW (1*32+31) /* 3DNow! */
  59. /* Transmeta-defined CPU features, CPUID level 0x80860001, word 2 */
  60. #define X86_FEATURE_RECOVERY (2*32+ 0) /* CPU in recovery mode */
  61. #define X86_FEATURE_LONGRUN (2*32+ 1) /* Longrun power control */
  62. #define X86_FEATURE_LRTI (2*32+ 3) /* LongRun table interface */
  63. /* Other features, Linux-defined mapping, word 3 */
  64. /* This range is used for feature bits which conflict or are synthesized */
  65. #define X86_FEATURE_CXMMX (3*32+ 0) /* Cyrix MMX extensions */
  66. #define X86_FEATURE_K6_MTRR (3*32+ 1) /* AMD K6 nonstandard MTRRs */
  67. #define X86_FEATURE_CYRIX_ARR (3*32+ 2) /* Cyrix ARRs (= MTRRs) */
  68. #define X86_FEATURE_CENTAUR_MCR (3*32+ 3) /* Centaur MCRs (= MTRRs) */
  69. /* cpu types for specific tunings: */
  70. #define X86_FEATURE_K8 (3*32+ 4) /* "" Opteron, Athlon64 */
  71. #define X86_FEATURE_K7 (3*32+ 5) /* "" Athlon */
  72. #define X86_FEATURE_P3 (3*32+ 6) /* "" P3 */
  73. #define X86_FEATURE_P4 (3*32+ 7) /* "" P4 */
  74. #define X86_FEATURE_CONSTANT_TSC (3*32+ 8) /* TSC ticks at a constant rate */
  75. #define X86_FEATURE_UP (3*32+ 9) /* smp kernel running on up */
  76. #define X86_FEATURE_FXSAVE_LEAK (3*32+10) /* "" FXSAVE leaks FOP/FIP/FOP */
  77. #define X86_FEATURE_ARCH_PERFMON (3*32+11) /* Intel Architectural PerfMon */
  78. #define X86_FEATURE_PEBS (3*32+12) /* Precise-Event Based Sampling */
  79. #define X86_FEATURE_BTS (3*32+13) /* Branch Trace Store */
  80. #define X86_FEATURE_SYSCALL32 (3*32+14) /* "" syscall in ia32 userspace */
  81. #define X86_FEATURE_SYSENTER32 (3*32+15) /* "" sysenter in ia32 userspace */
  82. #define X86_FEATURE_REP_GOOD (3*32+16) /* rep microcode works well */
  83. #define X86_FEATURE_MFENCE_RDTSC (3*32+17) /* "" Mfence synchronizes RDTSC */
  84. #define X86_FEATURE_LFENCE_RDTSC (3*32+18) /* "" Lfence synchronizes RDTSC */
  85. #define X86_FEATURE_11AP (3*32+19) /* "" Bad local APIC aka 11AP */
  86. #define X86_FEATURE_NOPL (3*32+20) /* The NOPL (0F 1F) instructions */
  87. /* 21 available, was AMD_C1E */
  88. #define X86_FEATURE_XTOPOLOGY (3*32+22) /* cpu topology enum extensions */
  89. #define X86_FEATURE_TSC_RELIABLE (3*32+23) /* TSC is known to be reliable */
  90. #define X86_FEATURE_NONSTOP_TSC (3*32+24) /* TSC does not stop in C states */
  91. #define X86_FEATURE_CLFLUSH_MONITOR (3*32+25) /* "" clflush reqd with monitor */
  92. #define X86_FEATURE_EXTD_APICID (3*32+26) /* has extended APICID (8 bits) */
  93. #define X86_FEATURE_AMD_DCM (3*32+27) /* multi-node processor */
  94. #define X86_FEATURE_APERFMPERF (3*32+28) /* APERFMPERF */
  95. /* Intel-defined CPU features, CPUID level 0x00000001 (ecx), word 4 */
  96. #define X86_FEATURE_XMM3 (4*32+ 0) /* "pni" SSE-3 */
  97. #define X86_FEATURE_PCLMULQDQ (4*32+ 1) /* PCLMULQDQ instruction */
  98. #define X86_FEATURE_DTES64 (4*32+ 2) /* 64-bit Debug Store */
  99. #define X86_FEATURE_MWAIT (4*32+ 3) /* "monitor" Monitor/Mwait support */
  100. #define X86_FEATURE_DSCPL (4*32+ 4) /* "ds_cpl" CPL Qual. Debug Store */
  101. #define X86_FEATURE_VMX (4*32+ 5) /* Hardware virtualization */
  102. #define X86_FEATURE_SMX (4*32+ 6) /* Safer mode */
  103. #define X86_FEATURE_EST (4*32+ 7) /* Enhanced SpeedStep */
  104. #define X86_FEATURE_TM2 (4*32+ 8) /* Thermal Monitor 2 */
  105. #define X86_FEATURE_SSSE3 (4*32+ 9) /* Supplemental SSE-3 */
  106. #define X86_FEATURE_CID (4*32+10) /* Context ID */
  107. #define X86_FEATURE_FMA (4*32+12) /* Fused multiply-add */
  108. #define X86_FEATURE_CX16 (4*32+13) /* CMPXCHG16B */
  109. #define X86_FEATURE_XTPR (4*32+14) /* Send Task Priority Messages */
  110. #define X86_FEATURE_PDCM (4*32+15) /* Performance Capabilities */
  111. #define X86_FEATURE_PCID (4*32+17) /* Process Context Identifiers */
  112. #define X86_FEATURE_DCA (4*32+18) /* Direct Cache Access */
  113. #define X86_FEATURE_XMM4_1 (4*32+19) /* "sse4_1" SSE-4.1 */
  114. #define X86_FEATURE_XMM4_2 (4*32+20) /* "sse4_2" SSE-4.2 */
  115. #define X86_FEATURE_X2APIC (4*32+21) /* x2APIC */
  116. #define X86_FEATURE_MOVBE (4*32+22) /* MOVBE instruction */
  117. #define X86_FEATURE_POPCNT (4*32+23) /* POPCNT instruction */
  118. #define X86_FEATURE_TSC_DEADLINE_TIMER (4*32+24) /* Tsc deadline timer */
  119. #define X86_FEATURE_AES (4*32+25) /* AES instructions */
  120. #define X86_FEATURE_XSAVE (4*32+26) /* XSAVE/XRSTOR/XSETBV/XGETBV */
  121. #define X86_FEATURE_OSXSAVE (4*32+27) /* "" XSAVE enabled in the OS */
  122. #define X86_FEATURE_AVX (4*32+28) /* Advanced Vector Extensions */
  123. #define X86_FEATURE_F16C (4*32+29) /* 16-bit fp conversions */
  124. #define X86_FEATURE_RDRAND (4*32+30) /* The RDRAND instruction */
  125. #define X86_FEATURE_HYPERVISOR (4*32+31) /* Running on a hypervisor */
  126. /* VIA/Cyrix/Centaur-defined CPU features, CPUID level 0xC0000001, word 5 */
  127. #define X86_FEATURE_XSTORE (5*32+ 2) /* "rng" RNG present (xstore) */
  128. #define X86_FEATURE_XSTORE_EN (5*32+ 3) /* "rng_en" RNG enabled */
  129. #define X86_FEATURE_XCRYPT (5*32+ 6) /* "ace" on-CPU crypto (xcrypt) */
  130. #define X86_FEATURE_XCRYPT_EN (5*32+ 7) /* "ace_en" on-CPU crypto enabled */
  131. #define X86_FEATURE_ACE2 (5*32+ 8) /* Advanced Cryptography Engine v2 */
  132. #define X86_FEATURE_ACE2_EN (5*32+ 9) /* ACE v2 enabled */
  133. #define X86_FEATURE_PHE (5*32+10) /* PadLock Hash Engine */
  134. #define X86_FEATURE_PHE_EN (5*32+11) /* PHE enabled */
  135. #define X86_FEATURE_PMM (5*32+12) /* PadLock Montgomery Multiplier */
  136. #define X86_FEATURE_PMM_EN (5*32+13) /* PMM enabled */
  137. /* More extended AMD flags: CPUID level 0x80000001, ecx, word 6 */
  138. #define X86_FEATURE_LAHF_LM (6*32+ 0) /* LAHF/SAHF in long mode */
  139. #define X86_FEATURE_CMP_LEGACY (6*32+ 1) /* If yes HyperThreading not valid */
  140. #define X86_FEATURE_SVM (6*32+ 2) /* Secure virtual machine */
  141. #define X86_FEATURE_EXTAPIC (6*32+ 3) /* Extended APIC space */
  142. #define X86_FEATURE_CR8_LEGACY (6*32+ 4) /* CR8 in 32-bit mode */
  143. #define X86_FEATURE_ABM (6*32+ 5) /* Advanced bit manipulation */
  144. #define X86_FEATURE_SSE4A (6*32+ 6) /* SSE-4A */
  145. #define X86_FEATURE_MISALIGNSSE (6*32+ 7) /* Misaligned SSE mode */
  146. #define X86_FEATURE_3DNOWPREFETCH (6*32+ 8) /* 3DNow prefetch instructions */
  147. #define X86_FEATURE_OSVW (6*32+ 9) /* OS Visible Workaround */
  148. #define X86_FEATURE_IBS (6*32+10) /* Instruction Based Sampling */
  149. #define X86_FEATURE_XOP (6*32+11) /* extended AVX instructions */
  150. #define X86_FEATURE_SKINIT (6*32+12) /* SKINIT/STGI instructions */
  151. #define X86_FEATURE_WDT (6*32+13) /* Watchdog timer */
  152. #define X86_FEATURE_LWP (6*32+15) /* Light Weight Profiling */
  153. #define X86_FEATURE_FMA4 (6*32+16) /* 4 operands MAC instructions */
  154. #define X86_FEATURE_TCE (6*32+17) /* translation cache extension */
  155. #define X86_FEATURE_NODEID_MSR (6*32+19) /* NodeId MSR */
  156. #define X86_FEATURE_TBM (6*32+21) /* trailing bit manipulations */
  157. #define X86_FEATURE_TOPOEXT (6*32+22) /* topology extensions CPUID leafs */
  158. #define X86_FEATURE_PERFCTR_CORE (6*32+23) /* core performance counter extensions */
  159. /*
  160. * Auxiliary flags: Linux defined - For features scattered in various
  161. * CPUID levels like 0x6, 0xA etc, word 7
  162. */
  163. #define X86_FEATURE_IDA (7*32+ 0) /* Intel Dynamic Acceleration */
  164. #define X86_FEATURE_ARAT (7*32+ 1) /* Always Running APIC Timer */
  165. #define X86_FEATURE_CPB (7*32+ 2) /* AMD Core Performance Boost */
  166. #define X86_FEATURE_EPB (7*32+ 3) /* IA32_ENERGY_PERF_BIAS support */
  167. #define X86_FEATURE_XSAVEOPT (7*32+ 4) /* Optimized Xsave */
  168. #define X86_FEATURE_PLN (7*32+ 5) /* Intel Power Limit Notification */
  169. #define X86_FEATURE_PTS (7*32+ 6) /* Intel Package Thermal Status */
  170. #define X86_FEATURE_DTHERM (7*32+ 7) /* Digital Thermal Sensor */
  171. #define X86_FEATURE_HW_PSTATE (7*32+ 8) /* AMD HW-PState */
  172. /* Virtualization flags: Linux defined, word 8 */
  173. #define X86_FEATURE_TPR_SHADOW (8*32+ 0) /* Intel TPR Shadow */
  174. #define X86_FEATURE_VNMI (8*32+ 1) /* Intel Virtual NMI */
  175. #define X86_FEATURE_FLEXPRIORITY (8*32+ 2) /* Intel FlexPriority */
  176. #define X86_FEATURE_EPT (8*32+ 3) /* Intel Extended Page Table */
  177. #define X86_FEATURE_VPID (8*32+ 4) /* Intel Virtual Processor ID */
  178. #define X86_FEATURE_NPT (8*32+ 5) /* AMD Nested Page Table support */
  179. #define X86_FEATURE_LBRV (8*32+ 6) /* AMD LBR Virtualization support */
  180. #define X86_FEATURE_SVML (8*32+ 7) /* "svm_lock" AMD SVM locking MSR */
  181. #define X86_FEATURE_NRIPS (8*32+ 8) /* "nrip_save" AMD SVM next_rip save */
  182. #define X86_FEATURE_TSCRATEMSR (8*32+ 9) /* "tsc_scale" AMD TSC scaling support */
  183. #define X86_FEATURE_VMCBCLEAN (8*32+10) /* "vmcb_clean" AMD VMCB clean bits support */
  184. #define X86_FEATURE_FLUSHBYASID (8*32+11) /* AMD flush-by-ASID support */
  185. #define X86_FEATURE_DECODEASSISTS (8*32+12) /* AMD Decode Assists support */
  186. #define X86_FEATURE_PAUSEFILTER (8*32+13) /* AMD filtered pause intercept */
  187. #define X86_FEATURE_PFTHRESHOLD (8*32+14) /* AMD pause filter threshold */
  188. /* Intel-defined CPU features, CPUID level 0x00000007:0 (ebx), word 9 */
  189. #define X86_FEATURE_FSGSBASE (9*32+ 0) /* {RD/WR}{FS/GS}BASE instructions*/
  190. #define X86_FEATURE_BMI1 (9*32+ 3) /* 1st group bit manipulation extensions */
  191. #define X86_FEATURE_HLE (9*32+ 4) /* Hardware Lock Elision */
  192. #define X86_FEATURE_AVX2 (9*32+ 5) /* AVX2 instructions */
  193. #define X86_FEATURE_SMEP (9*32+ 7) /* Supervisor Mode Execution Protection */
  194. #define X86_FEATURE_BMI2 (9*32+ 8) /* 2nd group bit manipulation extensions */
  195. #define X86_FEATURE_ERMS (9*32+ 9) /* Enhanced REP MOVSB/STOSB */
  196. #define X86_FEATURE_INVPCID (9*32+10) /* Invalidate Processor Context ID */
  197. #define X86_FEATURE_RTM (9*32+11) /* Restricted Transactional Memory */
  198. #if defined(__KERNEL__) && !defined(__ASSEMBLY__)
  199. #include <asm/asm.h>
  200. #include <linux/bitops.h>
  201. extern const char * const x86_cap_flags[NCAPINTS*32];
  202. extern const char * const x86_power_flags[32];
  203. #define test_cpu_cap(c, bit) \
  204. test_bit(bit, (unsigned long *)((c)->x86_capability))
  205. #define REQUIRED_MASK_BIT_SET(bit) \
  206. ( (((bit)>>5)==0 && (1UL<<((bit)&31) & REQUIRED_MASK0)) || \
  207. (((bit)>>5)==1 && (1UL<<((bit)&31) & REQUIRED_MASK1)) || \
  208. (((bit)>>5)==2 && (1UL<<((bit)&31) & REQUIRED_MASK2)) || \
  209. (((bit)>>5)==3 && (1UL<<((bit)&31) & REQUIRED_MASK3)) || \
  210. (((bit)>>5)==4 && (1UL<<((bit)&31) & REQUIRED_MASK4)) || \
  211. (((bit)>>5)==5 && (1UL<<((bit)&31) & REQUIRED_MASK5)) || \
  212. (((bit)>>5)==6 && (1UL<<((bit)&31) & REQUIRED_MASK6)) || \
  213. (((bit)>>5)==7 && (1UL<<((bit)&31) & REQUIRED_MASK7)) || \
  214. (((bit)>>5)==8 && (1UL<<((bit)&31) & REQUIRED_MASK8)) || \
  215. (((bit)>>5)==9 && (1UL<<((bit)&31) & REQUIRED_MASK9)) )
  216. #define cpu_has(c, bit) \
  217. (__builtin_constant_p(bit) && REQUIRED_MASK_BIT_SET(bit) ? 1 : \
  218. test_cpu_cap(c, bit))
  219. #define this_cpu_has(bit) \
  220. (__builtin_constant_p(bit) && REQUIRED_MASK_BIT_SET(bit) ? 1 : \
  221. x86_this_cpu_test_bit(bit, (unsigned long *)&cpu_info.x86_capability))
  222. #define boot_cpu_has(bit) cpu_has(&boot_cpu_data, bit)
  223. #define set_cpu_cap(c, bit) set_bit(bit, (unsigned long *)((c)->x86_capability))
  224. #define clear_cpu_cap(c, bit) clear_bit(bit, (unsigned long *)((c)->x86_capability))
  225. #define setup_clear_cpu_cap(bit) do { \
  226. clear_cpu_cap(&boot_cpu_data, bit); \
  227. set_bit(bit, (unsigned long *)cpu_caps_cleared); \
  228. } while (0)
  229. #define setup_force_cpu_cap(bit) do { \
  230. set_cpu_cap(&boot_cpu_data, bit); \
  231. set_bit(bit, (unsigned long *)cpu_caps_set); \
  232. } while (0)
  233. #define cpu_has_fpu boot_cpu_has(X86_FEATURE_FPU)
  234. #define cpu_has_vme boot_cpu_has(X86_FEATURE_VME)
  235. #define cpu_has_de boot_cpu_has(X86_FEATURE_DE)
  236. #define cpu_has_pse boot_cpu_has(X86_FEATURE_PSE)
  237. #define cpu_has_tsc boot_cpu_has(X86_FEATURE_TSC)
  238. #define cpu_has_pae boot_cpu_has(X86_FEATURE_PAE)
  239. #define cpu_has_pge boot_cpu_has(X86_FEATURE_PGE)
  240. #define cpu_has_apic boot_cpu_has(X86_FEATURE_APIC)
  241. #define cpu_has_sep boot_cpu_has(X86_FEATURE_SEP)
  242. #define cpu_has_mtrr boot_cpu_has(X86_FEATURE_MTRR)
  243. #define cpu_has_mmx boot_cpu_has(X86_FEATURE_MMX)
  244. #define cpu_has_fxsr boot_cpu_has(X86_FEATURE_FXSR)
  245. #define cpu_has_xmm boot_cpu_has(X86_FEATURE_XMM)
  246. #define cpu_has_xmm2 boot_cpu_has(X86_FEATURE_XMM2)
  247. #define cpu_has_xmm3 boot_cpu_has(X86_FEATURE_XMM3)
  248. #define cpu_has_ssse3 boot_cpu_has(X86_FEATURE_SSSE3)
  249. #define cpu_has_aes boot_cpu_has(X86_FEATURE_AES)
  250. #define cpu_has_avx boot_cpu_has(X86_FEATURE_AVX)
  251. #define cpu_has_ht boot_cpu_has(X86_FEATURE_HT)
  252. #define cpu_has_mp boot_cpu_has(X86_FEATURE_MP)
  253. #define cpu_has_nx boot_cpu_has(X86_FEATURE_NX)
  254. #define cpu_has_k6_mtrr boot_cpu_has(X86_FEATURE_K6_MTRR)
  255. #define cpu_has_cyrix_arr boot_cpu_has(X86_FEATURE_CYRIX_ARR)
  256. #define cpu_has_centaur_mcr boot_cpu_has(X86_FEATURE_CENTAUR_MCR)
  257. #define cpu_has_xstore boot_cpu_has(X86_FEATURE_XSTORE)
  258. #define cpu_has_xstore_enabled boot_cpu_has(X86_FEATURE_XSTORE_EN)
  259. #define cpu_has_xcrypt boot_cpu_has(X86_FEATURE_XCRYPT)
  260. #define cpu_has_xcrypt_enabled boot_cpu_has(X86_FEATURE_XCRYPT_EN)
  261. #define cpu_has_ace2 boot_cpu_has(X86_FEATURE_ACE2)
  262. #define cpu_has_ace2_enabled boot_cpu_has(X86_FEATURE_ACE2_EN)
  263. #define cpu_has_phe boot_cpu_has(X86_FEATURE_PHE)
  264. #define cpu_has_phe_enabled boot_cpu_has(X86_FEATURE_PHE_EN)
  265. #define cpu_has_pmm boot_cpu_has(X86_FEATURE_PMM)
  266. #define cpu_has_pmm_enabled boot_cpu_has(X86_FEATURE_PMM_EN)
  267. #define cpu_has_ds boot_cpu_has(X86_FEATURE_DS)
  268. #define cpu_has_pebs boot_cpu_has(X86_FEATURE_PEBS)
  269. #define cpu_has_clflush boot_cpu_has(X86_FEATURE_CLFLSH)
  270. #define cpu_has_bts boot_cpu_has(X86_FEATURE_BTS)
  271. #define cpu_has_gbpages boot_cpu_has(X86_FEATURE_GBPAGES)
  272. #define cpu_has_arch_perfmon boot_cpu_has(X86_FEATURE_ARCH_PERFMON)
  273. #define cpu_has_pat boot_cpu_has(X86_FEATURE_PAT)
  274. #define cpu_has_xmm4_1 boot_cpu_has(X86_FEATURE_XMM4_1)
  275. #define cpu_has_xmm4_2 boot_cpu_has(X86_FEATURE_XMM4_2)
  276. #define cpu_has_x2apic boot_cpu_has(X86_FEATURE_X2APIC)
  277. #define cpu_has_xsave boot_cpu_has(X86_FEATURE_XSAVE)
  278. #define cpu_has_osxsave boot_cpu_has(X86_FEATURE_OSXSAVE)
  279. #define cpu_has_hypervisor boot_cpu_has(X86_FEATURE_HYPERVISOR)
  280. #define cpu_has_pclmulqdq boot_cpu_has(X86_FEATURE_PCLMULQDQ)
  281. #define cpu_has_perfctr_core boot_cpu_has(X86_FEATURE_PERFCTR_CORE)
  282. #define cpu_has_cx8 boot_cpu_has(X86_FEATURE_CX8)
  283. #define cpu_has_cx16 boot_cpu_has(X86_FEATURE_CX16)
  284. #if defined(CONFIG_X86_INVLPG) || defined(CONFIG_X86_64)
  285. # define cpu_has_invlpg 1
  286. #else
  287. # define cpu_has_invlpg (boot_cpu_data.x86 > 3)
  288. #endif
  289. #ifdef CONFIG_X86_64
  290. #undef cpu_has_vme
  291. #define cpu_has_vme 0
  292. #undef cpu_has_pae
  293. #define cpu_has_pae ___BUG___
  294. #undef cpu_has_mp
  295. #define cpu_has_mp 1
  296. #undef cpu_has_k6_mtrr
  297. #define cpu_has_k6_mtrr 0
  298. #undef cpu_has_cyrix_arr
  299. #define cpu_has_cyrix_arr 0
  300. #undef cpu_has_centaur_mcr
  301. #define cpu_has_centaur_mcr 0
  302. #endif /* CONFIG_X86_64 */
  303. #if __GNUC__ >= 4
  304. /*
  305. * Static testing of CPU features. Used the same as boot_cpu_has().
  306. * These are only valid after alternatives have run, but will statically
  307. * patch the target code for additional performance.
  308. *
  309. */
  310. static __always_inline __pure bool __static_cpu_has(u16 bit)
  311. {
  312. #if __GNUC__ > 4 || __GNUC_MINOR__ >= 5
  313. asm_volatile_goto("1: jmp %l[t_no]\n"
  314. "2:\n"
  315. ".section .altinstructions,\"a\"\n"
  316. " .long 1b - .\n"
  317. " .long 0\n" /* no replacement */
  318. " .word %P0\n" /* feature bit */
  319. " .byte 2b - 1b\n" /* source len */
  320. " .byte 0\n" /* replacement len */
  321. ".previous\n"
  322. /* skipping size check since replacement size = 0 */
  323. : : "i" (bit) : : t_no);
  324. return true;
  325. t_no:
  326. return false;
  327. #else
  328. u8 flag;
  329. /* Open-coded due to __stringify() in ALTERNATIVE() */
  330. asm volatile("1: movb $0,%0\n"
  331. "2:\n"
  332. ".section .altinstructions,\"a\"\n"
  333. " .long 1b - .\n"
  334. " .long 3f - .\n"
  335. " .word %P1\n" /* feature bit */
  336. " .byte 2b - 1b\n" /* source len */
  337. " .byte 4f - 3f\n" /* replacement len */
  338. ".previous\n"
  339. ".section .discard,\"aw\",@progbits\n"
  340. " .byte 0xff + (4f-3f) - (2b-1b)\n" /* size check */
  341. ".previous\n"
  342. ".section .altinstr_replacement,\"ax\"\n"
  343. "3: movb $1,%0\n"
  344. "4:\n"
  345. ".previous\n"
  346. : "=qm" (flag) : "i" (bit));
  347. return flag;
  348. #endif
  349. }
  350. #define static_cpu_has(bit) \
  351. ( \
  352. __builtin_constant_p(boot_cpu_has(bit)) ? \
  353. boot_cpu_has(bit) : \
  354. __builtin_constant_p(bit) ? \
  355. __static_cpu_has(bit) : \
  356. boot_cpu_has(bit) \
  357. )
  358. #else
  359. /*
  360. * gcc 3.x is too stupid to do the static test; fall back to dynamic.
  361. */
  362. #define static_cpu_has(bit) boot_cpu_has(bit)
  363. #endif
  364. #endif /* defined(__KERNEL__) && !defined(__ASSEMBLY__) */
  365. #endif /* _ASM_X86_CPUFEATURE_H */