Contributors: 4
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Ard Biesheuvel |
126 |
53.62% |
2 |
22.22% |
| Herbert Xu |
52 |
22.13% |
2 |
22.22% |
| Jason A. Donenfeld |
30 |
12.77% |
2 |
22.22% |
| Eric Biggers |
27 |
11.49% |
3 |
33.33% |
| Total |
235 |
|
9 |
|
/* SPDX-License-Identifier: GPL-2.0 */
/*
* OpenSSL/Cryptogams accelerated Poly1305 transform for ARM
*
* Copyright (C) 2019 Linaro Ltd. <ard.biesheuvel@linaro.org>
*/
#include <asm/hwcap.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_arm(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 (IS_ENABLED(CONFIG_KERNEL_MODE_NEON) &&
static_branch_likely(&have_neon) && likely(may_use_simd())) {
do {
unsigned int todo = min_t(unsigned int, len, SZ_4K);
scoped_ksimd()
poly1305_blocks_neon(state, src, todo, padbit);
len -= todo;
src += todo;
} while (len);
} else
poly1305_blocks_arm(state, src, len, padbit);
}
#ifdef CONFIG_KERNEL_MODE_NEON
#define poly1305_mod_init_arch poly1305_mod_init_arch
static void poly1305_mod_init_arch(void)
{
if (elf_hwcap & HWCAP_NEON)
static_branch_enable(&have_neon);
}
#endif /* CONFIG_KERNEL_MODE_NEON */