blob: c1fbee7094e60d3eb0f91c90828103c896d39992 (
plain)
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
|
/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* SM3 using the RISC-V vector crypto extensions
*
* Copyright (C) 2023 VRULL GmbH
* Author: Heiko Stuebner <heiko.stuebner@vrull.eu>
*
* Copyright (C) 2023 SiFive, Inc.
* Author: Jerry Shih <jerry.shih@sifive.com>
*/
#include <asm/simd.h>
#include <asm/vector.h>
static __ro_after_init DEFINE_STATIC_KEY_FALSE(have_extensions);
asmlinkage void sm3_transform_zvksh_zvkb(struct sm3_block_state *state,
const u8 *data, size_t nblocks);
static void sm3_blocks(struct sm3_block_state *state,
const u8 *data, size_t nblocks)
{
if (static_branch_likely(&have_extensions) && likely(may_use_simd())) {
kernel_vector_begin();
sm3_transform_zvksh_zvkb(state, data, nblocks);
kernel_vector_end();
} else {
sm3_blocks_generic(state, data, nblocks);
}
}
#define sm3_mod_init_arch sm3_mod_init_arch
static void sm3_mod_init_arch(void)
{
if (riscv_isa_extension_available(NULL, ZVKSH) &&
riscv_isa_extension_available(NULL, ZVKB) &&
riscv_vector_vlen() >= 128)
static_branch_enable(&have_extensions);
}
|
