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