mirror of https://github.com/torvalds/linux.git
36 lines
880 B
C
36 lines
880 B
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* CRC-T10DIF using [V]PCLMULQDQ instructions
|
|
*
|
|
* Copyright 2024 Google LLC
|
|
*/
|
|
|
|
#include "crc-pclmul-template.h"
|
|
|
|
static __ro_after_init DEFINE_STATIC_KEY_FALSE(have_pclmulqdq);
|
|
|
|
DECLARE_CRC_PCLMUL_FUNCS(crc16_msb, u16);
|
|
|
|
static inline u16 crc_t10dif_arch(u16 crc, const u8 *p, size_t len)
|
|
{
|
|
CRC_PCLMUL(crc, p, len, crc16_msb, crc16_msb_0x8bb7_consts,
|
|
have_pclmulqdq);
|
|
return crc_t10dif_generic(crc, p, len);
|
|
}
|
|
|
|
#define crc_t10dif_mod_init_arch crc_t10dif_mod_init_arch
|
|
static inline void crc_t10dif_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(crc16_msb_pclmul,
|
|
crc16_msb_vpclmul_avx512);
|
|
else
|
|
static_call_update(crc16_msb_pclmul,
|
|
crc16_msb_vpclmul_avx2);
|
|
}
|
|
}
|
|
}
|