1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
|
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2015-2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
*/
#include <zinc/poly1305.h>
#include <asm/cpufeature.h>
#include <asm/processor.h>
#include <asm/intel-family.h>
asmlinkage void poly1305_init_x86_64(void *ctx,
const u8 key[POLY1305_KEY_SIZE]);
asmlinkage void poly1305_blocks_x86_64(void *ctx, const u8 *inp,
const size_t len, const u32 padbit);
asmlinkage void poly1305_emit_x86_64(void *ctx, u8 mac[POLY1305_MAC_SIZE],
const u32 nonce[4]);
#ifdef CONFIG_AS_AVX
asmlinkage void poly1305_emit_avx(void *ctx, u8 mac[POLY1305_MAC_SIZE],
const u32 nonce[4]);
asmlinkage void poly1305_blocks_avx(void *ctx, const u8 *inp, const size_t len,
const u32 padbit);
#endif
#ifdef CONFIG_AS_AVX2
asmlinkage void poly1305_blocks_avx2(void *ctx, const u8 *inp, const size_t len,
const u32 padbit);
#endif
#ifdef CONFIG_AS_AVX512
asmlinkage void poly1305_blocks_avx512(void *ctx, const u8 *inp,
const size_t len, const u32 padbit);
#endif
static bool poly1305_use_avx __ro_after_init;
static bool poly1305_use_avx2 __ro_after_init;
static bool poly1305_use_avx512 __ro_after_init;
void __init poly1305_fpu_init(void)
{
poly1305_use_avx =
boot_cpu_has(X86_FEATURE_AVX) &&
cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM, NULL);
poly1305_use_avx2 =
boot_cpu_has(X86_FEATURE_AVX) &&
boot_cpu_has(X86_FEATURE_AVX2) &&
cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM, NULL);
#ifndef COMPAT_CANNOT_USE_AVX512
poly1305_use_avx512 =
boot_cpu_has(X86_FEATURE_AVX) &&
boot_cpu_has(X86_FEATURE_AVX2) &&
boot_cpu_has(X86_FEATURE_AVX512F) &&
cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM |
XFEATURE_MASK_AVX512, NULL) &&
/* Skylake downclocks unacceptably much when using zmm. */
boot_cpu_data.x86_model != INTEL_FAM6_SKYLAKE_X;
#endif
}
static inline bool poly1305_init_arch(void *ctx,
const u8 key[POLY1305_KEY_SIZE])
{
poly1305_init_x86_64(ctx, key);
return true;
}
static inline bool poly1305_blocks_arch(void *ctx, const u8 *inp,
const size_t len, const u32 padbit,
simd_context_t simd_context)
{
#ifdef CONFIG_AS_AVX512
if (poly1305_use_avx512 && simd_context == HAVE_FULL_SIMD)
poly1305_blocks_avx512(ctx, inp, len, padbit);
else
#endif
#ifdef CONFIG_AS_AVX2
if (poly1305_use_avx2 && simd_context == HAVE_FULL_SIMD)
poly1305_blocks_avx2(ctx, inp, len, padbit);
else
#endif
#ifdef CONFIG_AS_AVX
if (poly1305_use_avx && simd_context == HAVE_FULL_SIMD)
poly1305_blocks_avx(ctx, inp, len, padbit);
else
#endif
poly1305_blocks_x86_64(ctx, inp, len, padbit);
return true;
}
static inline bool poly1305_emit_arch(void *ctx, u8 mac[POLY1305_MAC_SIZE],
const u32 nonce[4],
simd_context_t simd_context)
{
#ifdef CONFIG_AS_AVX512
if (poly1305_use_avx512 && simd_context == HAVE_FULL_SIMD)
poly1305_emit_avx(ctx, mac, nonce);
else
#endif
#ifdef CONFIG_AS_AVX2
if (poly1305_use_avx2 && simd_context == HAVE_FULL_SIMD)
poly1305_emit_avx(ctx, mac, nonce);
else
#endif
#ifdef CONFIG_AS_AVX
if (poly1305_use_avx && simd_context == HAVE_FULL_SIMD)
poly1305_emit_avx(ctx, mac, nonce);
else
#endif
poly1305_emit_x86_64(ctx, mac, nonce);
return true;
}
#define HAVE_POLY1305_ARCH_IMPLEMENTATION
|
