135 lines
4.1 KiB
C
135 lines
4.1 KiB
C
// 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 <crypto/internal/simd.h>
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#include <crypto/internal/hash.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_arch(struct blake2s_state *state,
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const u8 *block, size_t nblocks,
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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) || !crypto_simd_usable()) {
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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_arch);
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static int crypto_blake2s_update_x86(struct shash_desc *desc,
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const u8 *in, unsigned int inlen)
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{
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return crypto_blake2s_update(desc, in, inlen, blake2s_compress_arch);
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}
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static int crypto_blake2s_final_x86(struct shash_desc *desc, u8 *out)
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{
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return crypto_blake2s_final(desc, out, blake2s_compress_arch);
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}
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#define BLAKE2S_ALG(name, driver_name, digest_size) \
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{ \
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.base.cra_name = name, \
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.base.cra_driver_name = driver_name, \
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.base.cra_priority = 200, \
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.base.cra_flags = CRYPTO_ALG_OPTIONAL_KEY, \
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.base.cra_blocksize = BLAKE2S_BLOCK_SIZE, \
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.base.cra_ctxsize = sizeof(struct blake2s_tfm_ctx), \
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.base.cra_module = THIS_MODULE, \
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.digestsize = digest_size, \
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.setkey = crypto_blake2s_setkey, \
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.init = crypto_blake2s_init, \
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.update = crypto_blake2s_update_x86, \
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.final = crypto_blake2s_final_x86, \
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.descsize = sizeof(struct blake2s_state), \
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}
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static struct shash_alg blake2s_algs[] = {
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BLAKE2S_ALG("blake2s-128", "blake2s-128-x86", BLAKE2S_128_HASH_SIZE),
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BLAKE2S_ALG("blake2s-160", "blake2s-160-x86", BLAKE2S_160_HASH_SIZE),
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BLAKE2S_ALG("blake2s-224", "blake2s-224-x86", BLAKE2S_224_HASH_SIZE),
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BLAKE2S_ALG("blake2s-256", "blake2s-256-x86", BLAKE2S_256_HASH_SIZE),
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};
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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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return 0;
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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 IS_REACHABLE(CONFIG_CRYPTO_HASH) ?
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crypto_register_shashes(blake2s_algs,
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ARRAY_SIZE(blake2s_algs)) : 0;
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}
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static void __exit blake2s_mod_exit(void)
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{
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if (IS_REACHABLE(CONFIG_CRYPTO_HASH) && boot_cpu_has(X86_FEATURE_SSSE3))
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crypto_unregister_shashes(blake2s_algs, ARRAY_SIZE(blake2s_algs));
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}
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module_init(blake2s_mod_init);
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module_exit(blake2s_mod_exit);
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MODULE_ALIAS_CRYPTO("blake2s-128");
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MODULE_ALIAS_CRYPTO("blake2s-128-x86");
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MODULE_ALIAS_CRYPTO("blake2s-160");
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MODULE_ALIAS_CRYPTO("blake2s-160-x86");
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MODULE_ALIAS_CRYPTO("blake2s-224");
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MODULE_ALIAS_CRYPTO("blake2s-224-x86");
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MODULE_ALIAS_CRYPTO("blake2s-256");
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MODULE_ALIAS_CRYPTO("blake2s-256-x86");
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MODULE_LICENSE("GPL v2");
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