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>
49 lines
1.2 KiB
C
49 lines
1.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* CRC64 using [V]PCLMULQDQ instructions
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*
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* Copyright 2025 Google LLC
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*/
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#include "crc-pclmul-template.h"
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static __ro_after_init DEFINE_STATIC_KEY_FALSE(have_pclmulqdq);
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DECLARE_CRC_PCLMUL_FUNCS(crc64_msb, u64);
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DECLARE_CRC_PCLMUL_FUNCS(crc64_lsb, u64);
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static inline u64 crc64_be_arch(u64 crc, const u8 *p, size_t len)
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{
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CRC_PCLMUL(crc, p, len, crc64_msb, crc64_msb_0x42f0e1eba9ea3693_consts,
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have_pclmulqdq);
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return crc64_be_generic(crc, p, len);
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}
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static inline u64 crc64_nvme_arch(u64 crc, const u8 *p, size_t len)
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{
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CRC_PCLMUL(crc, p, len, crc64_lsb, crc64_lsb_0x9a6c9329ac4bc9b5_consts,
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have_pclmulqdq);
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return crc64_nvme_generic(crc, p, len);
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}
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#define crc64_mod_init_arch crc64_mod_init_arch
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static void crc64_mod_init_arch(void)
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{
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if (boot_cpu_has(X86_FEATURE_PCLMULQDQ)) {
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static_branch_enable(&have_pclmulqdq);
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if (have_vpclmul()) {
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if (have_avx512()) {
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static_call_update(crc64_msb_pclmul,
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crc64_msb_vpclmul_avx512);
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static_call_update(crc64_lsb_pclmul,
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crc64_lsb_vpclmul_avx512);
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} else {
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static_call_update(crc64_msb_pclmul,
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crc64_msb_vpclmul_avx2);
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static_call_update(crc64_lsb_pclmul,
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crc64_lsb_vpclmul_avx2);
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}
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}
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}
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}
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