mirror of https://github.com/torvalds/linux.git
39 lines
896 B
C
39 lines
896 B
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
|
/*
|
|
* SHA-1 optimized for ARM64
|
|
*
|
|
* Copyright 2025 Google LLC
|
|
*/
|
|
#include <asm/simd.h>
|
|
#include <linux/cpufeature.h>
|
|
|
|
static __ro_after_init DEFINE_STATIC_KEY_FALSE(have_ce);
|
|
|
|
asmlinkage size_t __sha1_ce_transform(struct sha1_block_state *state,
|
|
const u8 *data, size_t nblocks);
|
|
|
|
static void sha1_blocks(struct sha1_block_state *state,
|
|
const u8 *data, size_t nblocks)
|
|
{
|
|
if (static_branch_likely(&have_ce) && likely(may_use_simd())) {
|
|
do {
|
|
size_t rem;
|
|
|
|
scoped_ksimd()
|
|
rem = __sha1_ce_transform(state, data, nblocks);
|
|
|
|
data += (nblocks - rem) * SHA1_BLOCK_SIZE;
|
|
nblocks = rem;
|
|
} while (nblocks);
|
|
} else {
|
|
sha1_blocks_generic(state, data, nblocks);
|
|
}
|
|
}
|
|
|
|
#define sha1_mod_init_arch sha1_mod_init_arch
|
|
static void sha1_mod_init_arch(void)
|
|
{
|
|
if (cpu_have_named_feature(SHA1))
|
|
static_branch_enable(&have_ce);
|
|
}
|