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24c91b62ac
Instead of exposing the arm-optimized SHA-512 code via arm-specific crypto_shash algorithms, instead just implement the sha512_blocks() library function. This is much simpler, it makes the SHA-512 (and SHA-384) library functions be arm-optimized, and it fixes the longstanding issue where the arm-optimized SHA-512 code was disabled by default. SHA-512 still remains available through crypto_shash, but individual architectures no longer need to handle it. To match sha512_blocks(), change the type of the nblocks parameter of the assembly functions from int to size_t. The assembly functions actually already treated it as size_t. Acked-by: Ard Biesheuvel <ardb@kernel.org> Link: https://lore.kernel.org/r/20250630160320.2888-8-ebiggers@kernel.org Signed-off-by: Eric Biggers <ebiggers@kernel.org>
38 lines
1.1 KiB
C
38 lines
1.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* arm32-optimized SHA-512 block function
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*
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* Copyright 2025 Google LLC
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*/
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#include <asm/neon.h>
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#include <crypto/internal/simd.h>
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static __ro_after_init DEFINE_STATIC_KEY_FALSE(have_neon);
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asmlinkage void sha512_block_data_order(struct sha512_block_state *state,
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const u8 *data, size_t nblocks);
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asmlinkage void sha512_block_data_order_neon(struct sha512_block_state *state,
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const u8 *data, size_t nblocks);
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static void sha512_blocks(struct sha512_block_state *state,
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const u8 *data, size_t nblocks)
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{
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if (IS_ENABLED(CONFIG_KERNEL_MODE_NEON) &&
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static_branch_likely(&have_neon) && likely(crypto_simd_usable())) {
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kernel_neon_begin();
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sha512_block_data_order_neon(state, data, nblocks);
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kernel_neon_end();
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} else {
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sha512_block_data_order(state, data, nblocks);
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}
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}
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#ifdef CONFIG_KERNEL_MODE_NEON
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#define sha512_mod_init_arch sha512_mod_init_arch
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static inline void sha512_mod_init_arch(void)
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{
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if (cpu_has_neon())
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static_branch_enable(&have_neon);
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}
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#endif /* CONFIG_KERNEL_MODE_NEON */
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