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-only
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/*
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* Accelerated CRC-T10DIF using ARM NEON and Crypto Extensions instructions
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*
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* Copyright (C) 2016 Linaro Ltd <ard.biesheuvel@linaro.org>
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*/
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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_pmull);
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#define CRC_T10DIF_PMULL_CHUNK_SIZE 16U
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asmlinkage u16 crc_t10dif_pmull64(u16 init_crc, const u8 *buf, size_t len);
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asmlinkage void crc_t10dif_pmull8(u16 init_crc, const u8 *buf, size_t len,
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u8 out[16]);
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static inline u16 crc_t10dif_arch(u16 crc, const u8 *data, size_t length)
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{
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if (length >= CRC_T10DIF_PMULL_CHUNK_SIZE && likely(may_use_simd())) {
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if (static_branch_likely(&have_pmull)) {
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scoped_ksimd()
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return crc_t10dif_pmull64(crc, data, length);
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} else if (length > CRC_T10DIF_PMULL_CHUNK_SIZE &&
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static_branch_likely(&have_neon)) {
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u8 buf[16] __aligned(16);
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scoped_ksimd()
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crc_t10dif_pmull8(crc, data, length, buf);
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return crc_t10dif_generic(0, buf, sizeof(buf));
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}
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}
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return crc_t10dif_generic(crc, data, length);
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}
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#define crc_t10dif_mod_init_arch crc_t10dif_mod_init_arch
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static void crc_t10dif_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_PMULL)
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static_branch_enable(&have_pmull);
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}
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}
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