Contributors: 5
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Eric Biggers |
161 |
79.31% |
5 |
45.45% |
| Sami Tolvanen |
31 |
15.27% |
1 |
9.09% |
| Ard Biesheuvel |
6 |
2.96% |
2 |
18.18% |
| Herbert Xu |
4 |
1.97% |
2 |
18.18% |
| Vivek Goyal |
1 |
0.49% |
1 |
9.09% |
| Total |
203 |
|
11 |
|
/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* SHA-256 optimized for ARM
*
* Copyright 2025 Google LLC
*/
#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_ce);
asmlinkage void sha256_block_data_order(struct sha256_block_state *state,
const u8 *data, size_t nblocks);
asmlinkage void sha256_block_data_order_neon(struct sha256_block_state *state,
const u8 *data, size_t nblocks);
asmlinkage void sha256_ce_transform(struct sha256_block_state *state,
const u8 *data, size_t nblocks);
static void sha256_blocks(struct sha256_block_state *state,
const u8 *data, size_t nblocks)
{
if (IS_ENABLED(CONFIG_KERNEL_MODE_NEON) &&
static_branch_likely(&have_neon) && likely(may_use_simd())) {
scoped_ksimd() {
if (static_branch_likely(&have_ce))
sha256_ce_transform(state, data, nblocks);
else
sha256_block_data_order_neon(state, data, nblocks);
}
} else {
sha256_block_data_order(state, data, nblocks);
}
}
#ifdef CONFIG_KERNEL_MODE_NEON
#define sha256_mod_init_arch sha256_mod_init_arch
static void sha256_mod_init_arch(void)
{
if (elf_hwcap & HWCAP_NEON) {
static_branch_enable(&have_neon);
if (elf_hwcap2 & HWCAP2_SHA2)
static_branch_enable(&have_ce);
}
}
#endif /* CONFIG_KERNEL_MODE_NEON */