x86.h 2.1 KB

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  1. /* SPDX-License-Identifier: GPL-2.0-or-later */
  2. /* ----------------------------------------------------------------------- *
  3. *
  4. * Copyright 2002-2004 H. Peter Anvin - All Rights Reserved
  5. *
  6. * ----------------------------------------------------------------------- */
  7. /*
  8. * raid6/x86.h
  9. *
  10. * Definitions common to x86 and x86-64 RAID-6 code only
  11. */
  12. #ifndef LINUX_RAID_RAID6X86_H
  13. #define LINUX_RAID_RAID6X86_H
  14. #if (defined(__i386__) || defined(__x86_64__)) && !defined(__arch_um__)
  15. #ifdef __KERNEL__ /* Real code */
  16. #include <asm/fpu/api.h>
  17. #else /* Dummy code for user space testing */
  18. static inline void kernel_fpu_begin(void)
  19. {
  20. }
  21. static inline void kernel_fpu_end(void)
  22. {
  23. }
  24. #define __aligned(x) __attribute__((aligned(x)))
  25. #define X86_FEATURE_MMX (0*32+23) /* Multimedia Extensions */
  26. #define X86_FEATURE_FXSR (0*32+24) /* FXSAVE and FXRSTOR instructions
  27. * (fast save and restore) */
  28. #define X86_FEATURE_XMM (0*32+25) /* Streaming SIMD Extensions */
  29. #define X86_FEATURE_XMM2 (0*32+26) /* Streaming SIMD Extensions-2 */
  30. #define X86_FEATURE_XMM3 (4*32+ 0) /* "pni" SSE-3 */
  31. #define X86_FEATURE_SSSE3 (4*32+ 9) /* Supplemental SSE-3 */
  32. #define X86_FEATURE_AVX (4*32+28) /* Advanced Vector Extensions */
  33. #define X86_FEATURE_AVX2 (9*32+ 5) /* AVX2 instructions */
  34. #define X86_FEATURE_AVX512F (9*32+16) /* AVX-512 Foundation */
  35. #define X86_FEATURE_AVX512DQ (9*32+17) /* AVX-512 DQ (Double/Quad granular)
  36. * Instructions
  37. */
  38. #define X86_FEATURE_AVX512BW (9*32+30) /* AVX-512 BW (Byte/Word granular)
  39. * Instructions
  40. */
  41. #define X86_FEATURE_AVX512VL (9*32+31) /* AVX-512 VL (128/256 Vector Length)
  42. * Extensions
  43. */
  44. #define X86_FEATURE_MMXEXT (1*32+22) /* AMD MMX extensions */
  45. /* Should work well enough on modern CPUs for testing */
  46. static inline int boot_cpu_has(int flag)
  47. {
  48. u32 eax, ebx, ecx, edx;
  49. eax = (flag & 0x100) ? 7 :
  50. (flag & 0x20) ? 0x80000001 : 1;
  51. ecx = 0;
  52. asm volatile("cpuid"
  53. : "+a" (eax), "=b" (ebx), "=d" (edx), "+c" (ecx));
  54. return ((flag & 0x100 ? ebx :
  55. (flag & 0x80) ? ecx : edx) >> (flag & 31)) & 1;
  56. }
  57. #endif /* ndef __KERNEL__ */
  58. #endif
  59. #endif