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>
52 lines
1.5 KiB
C
52 lines
1.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* OpenSSL/Cryptogams accelerated Poly1305 transform for ARM
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*
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* Copyright (C) 2019 Linaro Ltd. <ard.biesheuvel@linaro.org>
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*/
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#include <asm/hwcap.h>
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#include <asm/simd.h>
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#include <linux/cpufeature.h>
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#include <linux/jump_label.h>
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#include <linux/kernel.h>
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asmlinkage void poly1305_block_init(struct poly1305_block_state *state,
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const u8 raw_key[POLY1305_BLOCK_SIZE]);
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asmlinkage void poly1305_blocks_arm(struct poly1305_block_state *state,
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const u8 *src, u32 len, u32 hibit);
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asmlinkage void poly1305_blocks_neon(struct poly1305_block_state *state,
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const u8 *src, u32 len, u32 hibit);
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asmlinkage void poly1305_emit(const struct poly1305_state *state,
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u8 digest[POLY1305_DIGEST_SIZE],
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const u32 nonce[4]);
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static __ro_after_init DEFINE_STATIC_KEY_FALSE(have_neon);
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static void poly1305_blocks(struct poly1305_block_state *state, const u8 *src,
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unsigned int len, u32 padbit)
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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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do {
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unsigned int todo = min_t(unsigned int, len, SZ_4K);
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scoped_ksimd()
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poly1305_blocks_neon(state, src, todo, padbit);
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len -= todo;
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src += todo;
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} while (len);
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} else
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poly1305_blocks_arm(state, src, len, padbit);
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}
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#ifdef CONFIG_KERNEL_MODE_NEON
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#define poly1305_mod_init_arch poly1305_mod_init_arch
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static void poly1305_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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}
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#endif /* CONFIG_KERNEL_MODE_NEON */
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