blob: e0c5a5d297c01a921ae9eddfd34397966168adb5 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
|
// SPDX-License-Identifier: GPL-2.0 OR MIT
/*
* Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
*/
#include <linux/simd.h>
#include <asm/hwcap.h>
#include <asm/neon.h>
asmlinkage void curve25519_neon(u8 mypublic[CURVE25519_KEY_SIZE],
const u8 secret[CURVE25519_KEY_SIZE],
const u8 basepoint[CURVE25519_KEY_SIZE]);
static bool curve25519_use_neon __ro_after_init;
static bool *const curve25519_nobs[] __initconst = { &curve25519_use_neon };
static void __init curve25519_fpu_init(void)
{
curve25519_use_neon = elf_hwcap & HWCAP_NEON;
}
static inline bool curve25519_arch(u8 mypublic[CURVE25519_KEY_SIZE],
const u8 secret[CURVE25519_KEY_SIZE],
const u8 basepoint[CURVE25519_KEY_SIZE])
{
simd_context_t simd_context;
bool used_arch = false;
simd_get(&simd_context);
if (IS_ENABLED(CONFIG_KERNEL_MODE_NEON) &&
!IS_ENABLED(CONFIG_CPU_BIG_ENDIAN) && curve25519_use_neon &&
simd_use(&simd_context)) {
curve25519_neon(mypublic, secret, basepoint);
used_arch = true;
}
simd_put(&simd_context);
return used_arch;
}
static inline bool curve25519_base_arch(u8 pub[CURVE25519_KEY_SIZE],
const u8 secret[CURVE25519_KEY_SIZE])
{
return false;
}
|
