78 lines
2.1 KiB
C
78 lines
2.1 KiB
C
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// SPDX-License-Identifier: GPL-2.0 OR MIT
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/*
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* Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
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*/
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#include <crypto/internal/blake2s.h>
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#include <linux/types.h>
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#include <linux/jump_label.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/sizes.h>
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#include <asm/cpufeature.h>
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#include <asm/fpu/api.h>
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#include <asm/processor.h>
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#include <asm/simd.h>
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asmlinkage void blake2s_compress_ssse3(struct blake2s_state *state,
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const u8 *block, const size_t nblocks,
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const u32 inc);
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asmlinkage void blake2s_compress_avx512(struct blake2s_state *state,
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const u8 *block, const size_t nblocks,
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const u32 inc);
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static __ro_after_init DEFINE_STATIC_KEY_FALSE(blake2s_use_ssse3);
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static __ro_after_init DEFINE_STATIC_KEY_FALSE(blake2s_use_avx512);
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void blake2s_compress(struct blake2s_state *state, const u8 *block,
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size_t nblocks, const u32 inc)
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{
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/* SIMD disables preemption, so relax after processing each page. */
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BUILD_BUG_ON(SZ_4K / BLAKE2S_BLOCK_SIZE < 8);
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if (!static_branch_likely(&blake2s_use_ssse3) || !may_use_simd()) {
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blake2s_compress_generic(state, block, nblocks, inc);
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return;
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}
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do {
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const size_t blocks = min_t(size_t, nblocks,
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SZ_4K / BLAKE2S_BLOCK_SIZE);
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kernel_fpu_begin();
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if (IS_ENABLED(CONFIG_AS_AVX512) &&
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static_branch_likely(&blake2s_use_avx512))
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blake2s_compress_avx512(state, block, blocks, inc);
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else
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blake2s_compress_ssse3(state, block, blocks, inc);
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kernel_fpu_end();
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nblocks -= blocks;
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block += blocks * BLAKE2S_BLOCK_SIZE;
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} while (nblocks);
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}
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EXPORT_SYMBOL(blake2s_compress);
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static int __init blake2s_mod_init(void)
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{
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if (boot_cpu_has(X86_FEATURE_SSSE3))
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static_branch_enable(&blake2s_use_ssse3);
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if (IS_ENABLED(CONFIG_AS_AVX512) &&
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boot_cpu_has(X86_FEATURE_AVX) &&
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boot_cpu_has(X86_FEATURE_AVX2) &&
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boot_cpu_has(X86_FEATURE_AVX512F) &&
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boot_cpu_has(X86_FEATURE_AVX512VL) &&
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cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM |
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XFEATURE_MASK_AVX512, NULL))
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static_branch_enable(&blake2s_use_avx512);
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return 0;
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}
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module_init(blake2s_mod_init);
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MODULE_LICENSE("GPL v2");
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