Linux kernel mirror (for testing)
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1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Shared crypto simd helpers
4 */
5
6#ifndef _CRYPTO_INTERNAL_SIMD_H
7#define _CRYPTO_INTERNAL_SIMD_H
8
9#include <asm/simd.h>
10#include <linux/percpu.h>
11#include <linux/types.h>
12
13/* skcipher support */
14
15struct simd_skcipher_alg;
16struct skcipher_alg;
17
18struct simd_skcipher_alg *simd_skcipher_create_compat(struct skcipher_alg *ialg,
19 const char *algname,
20 const char *drvname,
21 const char *basename);
22void simd_skcipher_free(struct simd_skcipher_alg *alg);
23
24int simd_register_skciphers_compat(struct skcipher_alg *algs, int count,
25 struct simd_skcipher_alg **simd_algs);
26
27void simd_unregister_skciphers(struct skcipher_alg *algs, int count,
28 struct simd_skcipher_alg **simd_algs);
29
30/* AEAD support */
31
32struct simd_aead_alg;
33struct aead_alg;
34
35int simd_register_aeads_compat(struct aead_alg *algs, int count,
36 struct simd_aead_alg **simd_algs);
37
38void simd_unregister_aeads(struct aead_alg *algs, int count,
39 struct simd_aead_alg **simd_algs);
40
41/*
42 * crypto_simd_usable() - is it allowed at this time to use SIMD instructions or
43 * access the SIMD register file?
44 *
45 * This delegates to may_use_simd(), except that this also returns false if SIMD
46 * in crypto code has been temporarily disabled on this CPU by the crypto
47 * self-tests, in order to test the no-SIMD fallback code. This override is
48 * currently limited to configurations where the "full" self-tests are enabled,
49 * because it might be a bit too invasive to be part of the "fast" self-tests.
50 */
51#ifdef CONFIG_CRYPTO_SELFTESTS_FULL
52DECLARE_PER_CPU(bool, crypto_simd_disabled_for_test);
53#define crypto_simd_usable() \
54 (may_use_simd() && !this_cpu_read(crypto_simd_disabled_for_test))
55#else
56#define crypto_simd_usable() may_use_simd()
57#endif
58
59#endif /* _CRYPTO_INTERNAL_SIMD_H */