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b59059a22c
Instead of exposing the riscv-optimized SHA-512 code via riscv-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 riscv-optimized, and it fixes the longstanding issue where the riscv-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 function from int to size_t. The assembly function actually already treated it as size_t. Note: to see the diff from arch/riscv/crypto/sha512-riscv64-glue.c to lib/crypto/riscv/sha512.h, view this commit with 'git show -M10'. Acked-by: Ard Biesheuvel <ardb@kernel.org> Link: https://lore.kernel.org/r/20250630160320.2888-12-ebiggers@kernel.org Signed-off-by: Eric Biggers <ebiggers@kernel.org>
41 lines
1.2 KiB
C
41 lines
1.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* SHA-512 and SHA-384 using the RISC-V vector crypto extensions
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*
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* Copyright (C) 2023 VRULL GmbH
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* Author: Heiko Stuebner <heiko.stuebner@vrull.eu>
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*
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* Copyright (C) 2023 SiFive, Inc.
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* Author: Jerry Shih <jerry.shih@sifive.com>
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*/
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#include <asm/simd.h>
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#include <asm/vector.h>
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#include <crypto/internal/simd.h>
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static __ro_after_init DEFINE_STATIC_KEY_FALSE(have_extensions);
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asmlinkage void sha512_transform_zvknhb_zvkb(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 (static_branch_likely(&have_extensions) &&
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likely(crypto_simd_usable())) {
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kernel_vector_begin();
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sha512_transform_zvknhb_zvkb(state, data, nblocks);
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kernel_vector_end();
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} else {
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sha512_blocks_generic(state, data, nblocks);
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}
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}
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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 (riscv_isa_extension_available(NULL, ZVKNHB) &&
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riscv_isa_extension_available(NULL, ZVKB) &&
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riscv_vector_vlen() >= 128)
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static_branch_enable(&have_extensions);
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}
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