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 | |
14 | struct simd_skcipher_alg; |
15 | struct skcipher_alg; |
16 | |
17 | struct simd_skcipher_alg *simd_skcipher_create_compat(const char *algname, |
18 | const char *drvname, |
19 | const char *basename); |
20 | struct simd_skcipher_alg *simd_skcipher_create(const char *algname, |
21 | const char *basename); |
22 | void simd_skcipher_free(struct simd_skcipher_alg *alg); |
23 | |
24 | int simd_register_skciphers_compat(struct skcipher_alg *algs, int count, |
25 | struct simd_skcipher_alg **simd_algs); |
26 | |
27 | void simd_unregister_skciphers(struct skcipher_alg *algs, int count, |
28 | struct simd_skcipher_alg **simd_algs); |
29 | |
30 | /* AEAD support */ |
31 | |
32 | struct simd_aead_alg; |
33 | struct aead_alg; |
34 | |
35 | struct simd_aead_alg *simd_aead_create_compat(const char *algname, |
36 | const char *drvname, |
37 | const char *basename); |
38 | struct simd_aead_alg *simd_aead_create(const char *algname, |
39 | const char *basename); |
40 | void simd_aead_free(struct simd_aead_alg *alg); |
41 | |
42 | int simd_register_aeads_compat(struct aead_alg *algs, int count, |
43 | struct simd_aead_alg **simd_algs); |
44 | |
45 | void simd_unregister_aeads(struct aead_alg *algs, int count, |
46 | struct simd_aead_alg **simd_algs); |
47 | |
48 | /* |
49 | * crypto_simd_usable() - is it allowed at this time to use SIMD instructions or |
50 | * access the SIMD register file? |
51 | * |
52 | * This delegates to may_use_simd(), except that this also returns false if SIMD |
53 | * in crypto code has been temporarily disabled on this CPU by the crypto |
54 | * self-tests, in order to test the no-SIMD fallback code. This override is |
55 | * currently limited to configurations where the extra self-tests are enabled, |
56 | * because it might be a bit too invasive to be part of the regular self-tests. |
57 | * |
58 | * This is a macro so that <asm/simd.h>, which some architectures don't have, |
59 | * doesn't have to be included directly here. |
60 | */ |
61 | #ifdef CONFIG_CRYPTO_MANAGER_EXTRA_TESTS |
62 | DECLARE_PER_CPU(bool, crypto_simd_disabled_for_test); |
63 | #define crypto_simd_usable() \ |
64 | (may_use_simd() && !this_cpu_read(crypto_simd_disabled_for_test)) |
65 | #else |
66 | #define crypto_simd_usable() may_use_simd() |
67 | #endif |
68 | |
69 | #endif /* _CRYPTO_INTERNAL_SIMD_H */ |
70 | |