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
|
/* SPDX-License-Identifier: GPL-2.0 OR MIT
*
* Copyright (C) 2015-2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
*/
#include <asm/cpufeature.h>
#include <asm/processor.h>
#include <asm/fpu/api.h>
#include <asm/simd.h>
#ifdef CONFIG_AS_AVX
asmlinkage void blake2s_compress_avx(struct blake2s_state *state,
const u8 *block, const size_t nblocks,
const u32 inc);
#endif
#ifdef CONFIG_AS_AVX512
asmlinkage void blake2s_compress_avx512(struct blake2s_state *state,
const u8 *block, const size_t nblocks,
const u32 inc);
#endif
static bool blake2s_use_avx __ro_after_init;
static bool blake2s_use_avx512 __ro_after_init;
static void __init blake2s_fpu_init(void)
{
blake2s_use_avx =
boot_cpu_has(X86_FEATURE_AVX) &&
cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM, NULL);
#ifndef COMPAT_CANNOT_USE_AVX512
blake2s_use_avx512 =
boot_cpu_has(X86_FEATURE_AVX) &&
boot_cpu_has(X86_FEATURE_AVX2) &&
boot_cpu_has(X86_FEATURE_AVX512F) &&
boot_cpu_has(X86_FEATURE_AVX512VL) &&
cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM |
XFEATURE_MASK_AVX512, NULL);
#endif
}
static inline bool blake2s_arch(struct blake2s_state *state, const u8 *block,
size_t nblocks, const u32 inc)
{
#ifdef CONFIG_AS_AVX512
if (blake2s_use_avx512 && irq_fpu_usable()) {
kernel_fpu_begin();
blake2s_compress_avx512(state, block, nblocks, inc);
kernel_fpu_end();
return true;
}
#endif
#ifdef CONFIG_AS_AVX
if (blake2s_use_avx && irq_fpu_usable()) {
kernel_fpu_begin();
blake2s_compress_avx(state, block, nblocks, inc);
kernel_fpu_end();
return true;
}
#endif
return false;
}
|
