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17ba6108d3
Instead of exposing the x86-optimized SM3 code via an x86-specific crypto_shash algorithm, instead just implement the sm3_blocks() library function. This is much simpler, it makes the SM3 library functions be x86-optimized, and it fixes the longstanding issue where the x86-optimized SM3 code was disabled by default. SM3 still remains available through crypto_shash, but individual architectures no longer need to handle it. Tweak the prototype of sm3_transform_avx() to match what the library expects, including changing the block count to size_t. Note that the assembly code actually already treated this argument as size_t. Acked-by: Ard Biesheuvel <ardb@kernel.org> Link: https://lore.kernel.org/r/20260321040935.410034-10-ebiggers@kernel.org Signed-off-by: Eric Biggers <ebiggers@kernel.org>
40 lines
1.0 KiB
C
40 lines
1.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* SM3 optimized for x86_64
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*
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* Copyright 2026 Google LLC
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*/
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#include <asm/fpu/api.h>
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#include <linux/static_call.h>
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asmlinkage void sm3_transform_avx(struct sm3_block_state *state,
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const u8 *data, size_t nblocks);
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static void sm3_blocks_avx(struct sm3_block_state *state,
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const u8 *data, size_t nblocks)
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{
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if (likely(irq_fpu_usable())) {
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kernel_fpu_begin();
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sm3_transform_avx(state, data, nblocks);
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kernel_fpu_end();
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} else {
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sm3_blocks_generic(state, data, nblocks);
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}
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}
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DEFINE_STATIC_CALL(sm3_blocks_x86, sm3_blocks_generic);
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static void sm3_blocks(struct sm3_block_state *state,
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const u8 *data, size_t nblocks)
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{
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static_call(sm3_blocks_x86)(state, data, nblocks);
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}
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#define sm3_mod_init_arch sm3_mod_init_arch
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static void sm3_mod_init_arch(void)
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{
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if (boot_cpu_has(X86_FEATURE_AVX) && boot_cpu_has(X86_FEATURE_BMI2) &&
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cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM, NULL))
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static_call_update(sm3_blocks_x86, sm3_blocks_avx);
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}
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