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 /*
9 * raid6/x86.h
10 *
11 * Definitions common to x86 and x86-64 RAID-6 code only
12 */
13
14 #ifndef LINUX_RAID_RAID6X86_H
15 #define LINUX_RAID_RAID6X86_H
16
17 #if (defined(__i386__) || defined(__x86_64__)) && !defined(__arch_um__)
18
19 #ifdef __KERNEL__ /* Real code */
20
21 #include <asm/fpu/api.h>
22
23 #else /* Dummy code for user space testing */
24
25 static inline void kernel_fpu_begin(void)
26 {
27 }
28
29 static inline void kernel_fpu_end(void)
30 {
31 }
32
33 #define __aligned(x) __attribute__((aligned(x)))
34
35 #define X86_FEATURE_MMX (0*32+23) /* Multimedia Extensions */
36 #define X86_FEATURE_FXSR (0*32+24) /* FXSAVE and FXRSTOR instructions
37 * (fast save and restore) */
38 #define X86_FEATURE_XMM (0*32+25) /* Streaming SIMD Extensions */
39 #define X86_FEATURE_XMM2 (0*32+26) /* Streaming SIMD Extensions-2 */
40 #define X86_FEATURE_XMM3 (4*32+ 0) /* "pni" SSE-3 */
41 #define X86_FEATURE_SSSE3 (4*32+ 9) /* Supplemental SSE-3 */
42 #define X86_FEATURE_AVX (4*32+28) /* Advanced Vector Extensions */
43 #define X86_FEATURE_AVX2 (9*32+ 5) /* AVX2 instructions */
44 #define X86_FEATURE_AVX512F (9*32+16) /* AVX-512 Foundation */
45 #define X86_FEATURE_AVX512DQ (9*32+17) /* AVX-512 DQ (Double/Quad granular)
46 * Instructions
47 */
48 #define X86_FEATURE_AVX512BW (9*32+30) /* AVX-512 BW (Byte/Word granular)
49 * Instructions
50 */
51 #define X86_FEATURE_AVX512VL (9*32+31) /* AVX-512 VL (128/256 Vector Length)
52 * Extensions
53 */
54 #define X86_FEATURE_MMXEXT (1*32+22) /* AMD MMX extensions */
55
56 /* Should work well enough on modern CPUs for testing */
57 static inline int boot_cpu_has(int flag)
58 {
59 u32 eax, ebx, ecx, edx;
60
61 eax = (flag & 0x100) ? 7 :
62 (flag & 0x20) ? 0x80000001 : 1;
63 ecx = 0;
64
65 asm volatile("cpuid"
66 : "+a" (eax), "=b" (ebx), "=d" (edx), "+c" (ecx));
67
68 return ((flag & 0x100 ? ebx :
69 (flag & 0x80) ? ecx : edx) >> (flag & 31)) & 1;
70 }
71
72 #endif /* ndef __KERNEL__ */
73
74 #endif
75 #endif