mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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47 lines
1.3 KiB
C
47 lines
1.3 KiB
C
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/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* SHA-1 optimized for ARM
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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 <asm/simd.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 sha1_block_data_order(struct sha1_block_state *state,
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const u8 *data, size_t nblocks);
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asmlinkage void sha1_transform_neon(struct sha1_block_state *state,
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const u8 *data, size_t nblocks);
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asmlinkage void sha1_ce_transform(struct sha1_block_state *state,
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const u8 *data, size_t nblocks);
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static void sha1_blocks(struct sha1_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(may_use_simd())) {
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kernel_neon_begin();
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if (static_branch_likely(&have_ce))
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sha1_ce_transform(state, data, nblocks);
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else
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sha1_transform_neon(state, data, nblocks);
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kernel_neon_end();
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} else {
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sha1_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 sha1_mod_init_arch sha1_mod_init_arch
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static inline void sha1_mod_init_arch(void)
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{
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if (elf_hwcap & HWCAP_NEON) {
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static_branch_enable(&have_neon);
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if (elf_hwcap2 & HWCAP2_SHA1)
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static_branch_enable(&have_ce);
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}
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}
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#endif /* CONFIG_KERNEL_MODE_NEON */
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