Contributors: 4
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Ard Biesheuvel |
130 |
56.03% |
1 |
12.50% |
| Herbert Xu |
40 |
17.24% |
1 |
12.50% |
| Eric Biggers |
32 |
13.79% |
5 |
62.50% |
| Jason A. Donenfeld |
30 |
12.93% |
1 |
12.50% |
| Total |
232 |
|
8 |
|
/* SPDX-License-Identifier: GPL-2.0 */
/*
* OpenSSL/Cryptogams accelerated Poly1305 transform for arm64
*
* Copyright (C) 2019 Linaro Ltd. <ard.biesheuvel@linaro.org>
*/
#include <asm/hwcap.h>
#include <asm/neon.h>
#include <asm/simd.h>
#include <linux/cpufeature.h>
#include <linux/jump_label.h>
#include <linux/kernel.h>
asmlinkage void poly1305_block_init(struct poly1305_block_state *state,
const u8 raw_key[POLY1305_BLOCK_SIZE]);
asmlinkage void poly1305_blocks_arm64(struct poly1305_block_state *state,
const u8 *src, u32 len, u32 hibit);
asmlinkage void poly1305_blocks_neon(struct poly1305_block_state *state,
const u8 *src, u32 len, u32 hibit);
asmlinkage void poly1305_emit(const struct poly1305_state *state,
u8 digest[POLY1305_DIGEST_SIZE],
const u32 nonce[4]);
static __ro_after_init DEFINE_STATIC_KEY_FALSE(have_neon);
static void poly1305_blocks(struct poly1305_block_state *state, const u8 *src,
unsigned int len, u32 padbit)
{
if (static_branch_likely(&have_neon) && likely(may_use_simd())) {
do {
unsigned int todo = min_t(unsigned int, len, SZ_4K);
kernel_neon_begin();
poly1305_blocks_neon(state, src, todo, padbit);
kernel_neon_end();
len -= todo;
src += todo;
} while (len);
} else
poly1305_blocks_arm64(state, src, len, padbit);
}
#define poly1305_mod_init_arch poly1305_mod_init_arch
static void poly1305_mod_init_arch(void)
{
if (cpu_have_named_feature(ASIMD))
static_branch_enable(&have_neon);
}