1// SPDX-License-Identifier: GPL-2.0 OR MIT
 2/*
 3 * Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
 4 */
 5
 6#include <crypto/internal/blake2s.h>
 7
 8#include <linux/types.h>
 9#include <linux/jump_label.h>
10#include <linux/kernel.h>
 
11#include <linux/sizes.h>
12
13#include <asm/cpufeature.h>
14#include <asm/fpu/api.h>
15#include <asm/processor.h>
16#include <asm/simd.h>
17
18asmlinkage void blake2s_compress_ssse3(struct blake2s_state *state,
19				       const u8 *block, const size_t nblocks,
20				       const u32 inc);
21asmlinkage void blake2s_compress_avx512(struct blake2s_state *state,
22					const u8 *block, const size_t nblocks,
23					const u32 inc);
24
25static __ro_after_init DEFINE_STATIC_KEY_FALSE(blake2s_use_ssse3);
26static __ro_after_init DEFINE_STATIC_KEY_FALSE(blake2s_use_avx512);
27
28void blake2s_compress(struct blake2s_state *state, const u8 *block,
29		      size_t nblocks, const u32 inc)
30{
31	/* SIMD disables preemption, so relax after processing each page. */
32	BUILD_BUG_ON(SZ_4K / BLAKE2S_BLOCK_SIZE < 8);
33
34	if (!static_branch_likely(&blake2s_use_ssse3) || !may_use_simd()) {
35		blake2s_compress_generic(state, block, nblocks, inc);
36		return;
37	}
38
39	do {
40		const size_t blocks = min_t(size_t, nblocks,
41					    SZ_4K / BLAKE2S_BLOCK_SIZE);
42
43		kernel_fpu_begin();
44		if (IS_ENABLED(CONFIG_AS_AVX512) &&
45		    static_branch_likely(&blake2s_use_avx512))
46			blake2s_compress_avx512(state, block, blocks, inc);
47		else
48			blake2s_compress_ssse3(state, block, blocks, inc);
49		kernel_fpu_end();
50
51		nblocks -= blocks;
52		block += blocks * BLAKE2S_BLOCK_SIZE;
53	} while (nblocks);
54}
55EXPORT_SYMBOL(blake2s_compress);
56
57static int __init blake2s_mod_init(void)
58{
59	if (boot_cpu_has(X86_FEATURE_SSSE3))
60		static_branch_enable(&blake2s_use_ssse3);
61
62	if (IS_ENABLED(CONFIG_AS_AVX512) &&
63	    boot_cpu_has(X86_FEATURE_AVX) &&
64	    boot_cpu_has(X86_FEATURE_AVX2) &&
65	    boot_cpu_has(X86_FEATURE_AVX512F) &&
66	    boot_cpu_has(X86_FEATURE_AVX512VL) &&
67	    cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM |
68			      XFEATURE_MASK_AVX512, NULL))
69		static_branch_enable(&blake2s_use_avx512);
70
71	return 0;
72}
73
74subsys_initcall(blake2s_mod_init);
 
 

 1// SPDX-License-Identifier: GPL-2.0 OR MIT
 2/*
 3 * Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
 4 */
 5
 6#include <crypto/internal/blake2s.h>
 7
 8#include <linux/types.h>
 9#include <linux/jump_label.h>
10#include <linux/kernel.h>
11#include <linux/module.h>
12#include <linux/sizes.h>
13
14#include <asm/cpufeature.h>
15#include <asm/fpu/api.h>
16#include <asm/processor.h>
17#include <asm/simd.h>
18
19asmlinkage void blake2s_compress_ssse3(struct blake2s_state *state,
20				       const u8 *block, const size_t nblocks,
21				       const u32 inc);
22asmlinkage void blake2s_compress_avx512(struct blake2s_state *state,
23					const u8 *block, const size_t nblocks,
24					const u32 inc);
25
26static __ro_after_init DEFINE_STATIC_KEY_FALSE(blake2s_use_ssse3);
27static __ro_after_init DEFINE_STATIC_KEY_FALSE(blake2s_use_avx512);
28
29void blake2s_compress(struct blake2s_state *state, const u8 *block,
30		      size_t nblocks, const u32 inc)
31{
32	/* SIMD disables preemption, so relax after processing each page. */
33	BUILD_BUG_ON(SZ_4K / BLAKE2S_BLOCK_SIZE < 8);
34
35	if (!static_branch_likely(&blake2s_use_ssse3) || !may_use_simd()) {
36		blake2s_compress_generic(state, block, nblocks, inc);
37		return;
38	}
39
40	do {
41		const size_t blocks = min_t(size_t, nblocks,
42					    SZ_4K / BLAKE2S_BLOCK_SIZE);
43
44		kernel_fpu_begin();
45		if (IS_ENABLED(CONFIG_AS_AVX512) &&
46		    static_branch_likely(&blake2s_use_avx512))
47			blake2s_compress_avx512(state, block, blocks, inc);
48		else
49			blake2s_compress_ssse3(state, block, blocks, inc);
50		kernel_fpu_end();
51
52		nblocks -= blocks;
53		block += blocks * BLAKE2S_BLOCK_SIZE;
54	} while (nblocks);
55}
56EXPORT_SYMBOL(blake2s_compress);
57
58static int __init blake2s_mod_init(void)
59{
60	if (boot_cpu_has(X86_FEATURE_SSSE3))
61		static_branch_enable(&blake2s_use_ssse3);
62
63	if (IS_ENABLED(CONFIG_AS_AVX512) &&
64	    boot_cpu_has(X86_FEATURE_AVX) &&
65	    boot_cpu_has(X86_FEATURE_AVX2) &&
66	    boot_cpu_has(X86_FEATURE_AVX512F) &&
67	    boot_cpu_has(X86_FEATURE_AVX512VL) &&
68	    cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM |
69			      XFEATURE_MASK_AVX512, NULL))
70		static_branch_enable(&blake2s_use_avx512);
71
72	return 0;
73}
74
75module_init(blake2s_mod_init);
76
77MODULE_LICENSE("GPL v2");