Greg Kroah-Hartman | b244131 | 2017-11-01 15:07:57 +0100 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
Herbert Xu | 266d051 | 2016-11-22 20:08:25 +0800 | [diff] [blame] | 2 | /* |
| 3 | * Shared crypto simd helpers |
| 4 | */ |
| 5 | |
| 6 | #ifndef _CRYPTO_INTERNAL_SIMD_H |
| 7 | #define _CRYPTO_INTERNAL_SIMD_H |
| 8 | |
Eric Biggers | b55e1a3 | 2019-03-12 22:12:47 -0700 | [diff] [blame] | 9 | #include <linux/percpu.h> |
| 10 | #include <linux/types.h> |
| 11 | |
Eric Biggers | 1661131 | 2019-03-10 12:00:50 -0700 | [diff] [blame] | 12 | /* skcipher support */ |
| 13 | |
Herbert Xu | 266d051 | 2016-11-22 20:08:25 +0800 | [diff] [blame] | 14 | struct simd_skcipher_alg; |
Eric Biggers | d14f0a1 | 2018-02-19 23:47:59 -0800 | [diff] [blame] | 15 | struct skcipher_alg; |
Herbert Xu | 266d051 | 2016-11-22 20:08:25 +0800 | [diff] [blame] | 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 | |
Eric Biggers | d14f0a1 | 2018-02-19 23:47:59 -0800 | [diff] [blame] | 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 | |
Eric Biggers | 1661131 | 2019-03-10 12:00:50 -0700 | [diff] [blame] | 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 | |
Eric Biggers | b55e1a3 | 2019-03-12 22:12:47 -0700 | [diff] [blame] | 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 | |
Herbert Xu | 266d051 | 2016-11-22 20:08:25 +0800 | [diff] [blame] | 69 | #endif /* _CRYPTO_INTERNAL_SIMD_H */ |