mirror of
https://github.com/torvalds/linux.git
synced 2025-12-07 20:06:24 +00:00
5ff74f5f71
Drop 'inline' from all the *_mod_init_arch() functions so that the compiler will warn about any bugs where they are unused due to not being wired up properly. (There are no such bugs currently, so this just establishes a more robust convention for the future. Of course, these functions also tend to get inlined anyway, regardless of the keyword.) Link: https://lore.kernel.org/r/20250816020240.431545-1-ebiggers@kernel.org Signed-off-by: Eric Biggers <ebiggers@kernel.org>
54 lines
1.5 KiB
C
54 lines
1.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* Accelerated CRC-T10DIF using ARM NEON and Crypto Extensions instructions
|
|
*
|
|
* Copyright (C) 2016 Linaro Ltd <ard.biesheuvel@linaro.org>
|
|
*/
|
|
|
|
#include <asm/neon.h>
|
|
#include <asm/simd.h>
|
|
|
|
static __ro_after_init DEFINE_STATIC_KEY_FALSE(have_neon);
|
|
static __ro_after_init DEFINE_STATIC_KEY_FALSE(have_pmull);
|
|
|
|
#define CRC_T10DIF_PMULL_CHUNK_SIZE 16U
|
|
|
|
asmlinkage u16 crc_t10dif_pmull64(u16 init_crc, const u8 *buf, size_t len);
|
|
asmlinkage void crc_t10dif_pmull8(u16 init_crc, const u8 *buf, size_t len,
|
|
u8 out[16]);
|
|
|
|
static inline u16 crc_t10dif_arch(u16 crc, const u8 *data, size_t length)
|
|
{
|
|
if (length >= CRC_T10DIF_PMULL_CHUNK_SIZE) {
|
|
if (static_branch_likely(&have_pmull)) {
|
|
if (likely(may_use_simd())) {
|
|
kernel_neon_begin();
|
|
crc = crc_t10dif_pmull64(crc, data, length);
|
|
kernel_neon_end();
|
|
return crc;
|
|
}
|
|
} else if (length > CRC_T10DIF_PMULL_CHUNK_SIZE &&
|
|
static_branch_likely(&have_neon) &&
|
|
likely(may_use_simd())) {
|
|
u8 buf[16] __aligned(16);
|
|
|
|
kernel_neon_begin();
|
|
crc_t10dif_pmull8(crc, data, length, buf);
|
|
kernel_neon_end();
|
|
|
|
return crc_t10dif_generic(0, buf, sizeof(buf));
|
|
}
|
|
}
|
|
return crc_t10dif_generic(crc, data, length);
|
|
}
|
|
|
|
#define crc_t10dif_mod_init_arch crc_t10dif_mod_init_arch
|
|
static void crc_t10dif_mod_init_arch(void)
|
|
{
|
|
if (elf_hwcap & HWCAP_NEON) {
|
|
static_branch_enable(&have_neon);
|
|
if (elf_hwcap2 & HWCAP2_PMULL)
|
|
static_branch_enable(&have_pmull);
|
|
}
|
|
}
|