Contributors: 2
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Eric Biggers |
132 |
73.74% |
4 |
57.14% |
| Ard Biesheuvel |
47 |
26.26% |
3 |
42.86% |
| Total |
179 |
|
7 |
|
/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* arm64-optimized SHA-512 block function
*
* Copyright 2025 Google LLC
*/
#include <asm/neon.h>
#include <asm/simd.h>
#include <linux/cpufeature.h>
static __ro_after_init DEFINE_STATIC_KEY_FALSE(have_sha512_insns);
asmlinkage void sha512_block_data_order(struct sha512_block_state *state,
const u8 *data, size_t nblocks);
asmlinkage size_t __sha512_ce_transform(struct sha512_block_state *state,
const u8 *data, size_t nblocks);
static void sha512_blocks(struct sha512_block_state *state,
const u8 *data, size_t nblocks)
{
if (IS_ENABLED(CONFIG_KERNEL_MODE_NEON) &&
static_branch_likely(&have_sha512_insns) &&
likely(may_use_simd())) {
do {
size_t rem;
kernel_neon_begin();
rem = __sha512_ce_transform(state, data, nblocks);
kernel_neon_end();
data += (nblocks - rem) * SHA512_BLOCK_SIZE;
nblocks = rem;
} while (nblocks);
} else {
sha512_block_data_order(state, data, nblocks);
}
}
#ifdef CONFIG_KERNEL_MODE_NEON
#define sha512_mod_init_arch sha512_mod_init_arch
static void sha512_mod_init_arch(void)
{
if (cpu_have_named_feature(SHA512))
static_branch_enable(&have_sha512_insns);
}
#endif /* CONFIG_KERNEL_MODE_NEON */