42 lines
1.1 KiB
C
42 lines
1.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* SM3 optimized for ARM64
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*
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* Copyright 2026 Google LLC
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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_neon);
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static __ro_after_init DEFINE_STATIC_KEY_FALSE(have_ce);
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asmlinkage void sm3_neon_transform(struct sm3_block_state *state,
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const u8 *data, size_t nblocks);
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asmlinkage void sm3_ce_transform(struct sm3_block_state *state,
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const u8 *data, size_t nblocks);
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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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if (static_branch_likely(&have_neon) && likely(may_use_simd())) {
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scoped_ksimd() {
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if (static_branch_likely(&have_ce))
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sm3_ce_transform(state, data, nblocks);
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else
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sm3_neon_transform(state, data, nblocks);
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}
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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 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 (cpu_have_named_feature(ASIMD)) {
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static_branch_enable(&have_neon);
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if (cpu_have_named_feature(SM3))
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static_branch_enable(&have_ce);
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}
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}
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