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484c18119f
Instead of exposing the x86-optimized SHA-512 code via x86-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 x86-optimized, and it fixes the longstanding issue where the x86-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/20250630160320.2888-15-ebiggers@kernel.org Signed-off-by: Eric Biggers <ebiggers@kernel.org>
54 lines
1.9 KiB
C
54 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* x86-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/fpu/api.h>
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#include <crypto/internal/simd.h>
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#include <linux/static_call.h>
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DEFINE_STATIC_CALL(sha512_blocks_x86, sha512_blocks_generic);
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#define DEFINE_X86_SHA512_FN(c_fn, asm_fn) \
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asmlinkage void asm_fn(struct sha512_block_state *state, \
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const u8 *data, size_t nblocks); \
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static void c_fn(struct sha512_block_state *state, const u8 *data, \
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size_t nblocks) \
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{ \
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if (likely(crypto_simd_usable())) { \
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kernel_fpu_begin(); \
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asm_fn(state, data, nblocks); \
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kernel_fpu_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_X86_SHA512_FN(sha512_blocks_ssse3, sha512_transform_ssse3);
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DEFINE_X86_SHA512_FN(sha512_blocks_avx, sha512_transform_avx);
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DEFINE_X86_SHA512_FN(sha512_blocks_avx2, sha512_transform_rorx);
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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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static_call(sha512_blocks_x86)(state, data, nblocks);
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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 (cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM, NULL) &&
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boot_cpu_has(X86_FEATURE_AVX)) {
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if (boot_cpu_has(X86_FEATURE_AVX2) &&
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boot_cpu_has(X86_FEATURE_BMI2))
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static_call_update(sha512_blocks_x86,
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sha512_blocks_avx2);
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else
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static_call_update(sha512_blocks_x86,
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sha512_blocks_avx);
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} else if (boot_cpu_has(X86_FEATURE_SSSE3)) {
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static_call_update(sha512_blocks_x86, sha512_blocks_ssse3);
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}
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}
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