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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 <linux/percpu.h>
10#include <linux/types.h>
11
12/* skcipher support */
13
14struct simd_skcipher_alg;
15struct skcipher_alg;
16
17struct simd_skcipher_alg *simd_skcipher_create_compat(struct skcipher_alg *ialg,
18 const char *algname,
19 const char *drvname,
20 const char *basename);
21void simd_skcipher_free(struct simd_skcipher_alg *alg);
22
23int simd_register_skciphers_compat(struct skcipher_alg *algs, int count,
24 struct simd_skcipher_alg **simd_algs);
25
26void simd_unregister_skciphers(struct skcipher_alg *algs, int count,
27 struct simd_skcipher_alg **simd_algs);
28
29/* AEAD support */
30
31struct simd_aead_alg;
32struct aead_alg;
33
34int simd_register_aeads_compat(struct aead_alg *algs, int count,
35 struct simd_aead_alg **simd_algs);
36
37void simd_unregister_aeads(struct aead_alg *algs, int count,
38 struct simd_aead_alg **simd_algs);
39
40/*
41 * crypto_simd_usable() - is it allowed at this time to use SIMD instructions or
42 * access the SIMD register file?
43 *
44 * This delegates to may_use_simd(), except that this also returns false if SIMD
45 * in crypto code has been temporarily disabled on this CPU by the crypto
46 * self-tests, in order to test the no-SIMD fallback code. This override is
47 * currently limited to configurations where the extra self-tests are enabled,
48 * because it might be a bit too invasive to be part of the regular self-tests.
49 *
50 * This is a macro so that <asm/simd.h>, which some architectures don't have,
51 * doesn't have to be included directly here.
52 */
53#ifdef CONFIG_CRYPTO_MANAGER_EXTRA_TESTS
54DECLARE_PER_CPU(bool, crypto_simd_disabled_for_test);
55#define crypto_simd_usable() \
56 (may_use_simd() && !this_cpu_read(crypto_simd_disabled_for_test))
57#else
58#define crypto_simd_usable() may_use_simd()
59#endif
60
61#endif /* _CRYPTO_INTERNAL_SIMD_H */