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8dcac98a47
Move the arm64 implementations of SHA-3 and POLYVAL to the newly introduced scoped ksimd API, which replaces kernel_neon_begin() and kernel_neon_end(). On arm64, this is needed because the latter API will change in an incompatible manner. Signed-off-by: Ard Biesheuvel <ardb@kernel.org> Signed-off-by: Eric Biggers <ebiggers@kernel.org>
60 lines
1.6 KiB
C
60 lines
1.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2018 Linaro Ltd <ard.biesheuvel@linaro.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <asm/simd.h>
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#include <linux/cpufeature.h>
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static __ro_after_init DEFINE_STATIC_KEY_FALSE(have_sha3);
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asmlinkage size_t sha3_ce_transform(struct sha3_state *state, const u8 *data,
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size_t nblocks, size_t block_size);
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static void sha3_absorb_blocks(struct sha3_state *state, const u8 *data,
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size_t nblocks, size_t block_size)
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{
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if (static_branch_likely(&have_sha3) && likely(may_use_simd())) {
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do {
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size_t rem;
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scoped_ksimd()
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rem = sha3_ce_transform(state, data, nblocks,
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block_size);
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data += (nblocks - rem) * block_size;
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nblocks = rem;
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} while (nblocks);
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} else {
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sha3_absorb_blocks_generic(state, data, nblocks, block_size);
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}
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}
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static void sha3_keccakf(struct sha3_state *state)
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{
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if (static_branch_likely(&have_sha3) && likely(may_use_simd())) {
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/*
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* Passing zeroes into sha3_ce_transform() gives the plain
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* Keccak-f permutation, which is what we want here. Any
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* supported block size may be used. Use SHA3_512_BLOCK_SIZE
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* since it's the shortest.
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*/
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static const u8 zeroes[SHA3_512_BLOCK_SIZE];
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scoped_ksimd()
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sha3_ce_transform(state, zeroes, 1, sizeof(zeroes));
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} else {
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sha3_keccakf_generic(state);
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}
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}
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#define sha3_mod_init_arch sha3_mod_init_arch
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static void sha3_mod_init_arch(void)
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{
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if (cpu_have_named_feature(SHA3))
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static_branch_enable(&have_sha3);
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}
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