Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
47 lines
1.3 KiB
C
47 lines
1.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* SHA-256 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 sha256_block_data_order(struct sha256_block_state *state,
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const u8 *data, size_t nblocks);
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asmlinkage void sha256_block_data_order_neon(struct sha256_block_state *state,
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const u8 *data, size_t nblocks);
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asmlinkage void sha256_ce_transform(struct sha256_block_state *state,
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const u8 *data, size_t nblocks);
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static void sha256_blocks(struct sha256_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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scoped_ksimd() {
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if (static_branch_likely(&have_ce))
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sha256_ce_transform(state, data, nblocks);
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else
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sha256_block_data_order_neon(state, data, nblocks);
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}
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} else {
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sha256_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 sha256_mod_init_arch sha256_mod_init_arch
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static void sha256_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_SHA2)
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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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