| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
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| 2 | /* |
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| 3 | * Shared crypto simd helpers |
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| 4 | */ |
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| 5 | |
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| 6 | #ifndef _CRYPTO_INTERNAL_SIMD_H |
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| 7 | #define _CRYPTO_INTERNAL_SIMD_H |
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| 8 | |
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| 9 | #include <asm/simd.h> |
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| 10 | #include <linux/percpu.h> |
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| 11 | #include <linux/types.h> |
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| 12 | |
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| 13 | /* skcipher support */ |
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| 14 | |
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| 15 | struct simd_skcipher_alg; |
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| 16 | struct skcipher_alg; |
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| 17 | |
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| 18 | struct simd_skcipher_alg *simd_skcipher_create_compat(struct skcipher_alg *ialg, |
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| 19 | const char *algname, |
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| 20 | const char *drvname, |
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| 21 | const char *basename); |
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| 22 | void simd_skcipher_free(struct simd_skcipher_alg *alg); |
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| 23 | |
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| 24 | int simd_register_skciphers_compat(struct skcipher_alg *algs, int count, |
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| 25 | struct simd_skcipher_alg **simd_algs); |
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| 26 | |
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| 27 | void simd_unregister_skciphers(struct skcipher_alg *algs, int count, |
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| 28 | struct simd_skcipher_alg **simd_algs); |
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| 29 | |
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| 30 | /* AEAD support */ |
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| 31 | |
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| 32 | struct simd_aead_alg; |
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| 33 | struct aead_alg; |
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| 34 | |
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| 35 | int simd_register_aeads_compat(struct aead_alg *algs, int count, |
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| 36 | struct simd_aead_alg **simd_algs); |
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| 37 | |
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| 38 | void simd_unregister_aeads(struct aead_alg *algs, int count, |
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| 39 | struct simd_aead_alg **simd_algs); |
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| 40 | |
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| 41 | /* |
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| 42 | * crypto_simd_usable() - is it allowed at this time to use SIMD instructions or |
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| 43 | * access the SIMD register file? |
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| 44 | * |
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| 45 | * This delegates to may_use_simd(), except that this also returns false if SIMD |
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| 46 | * in crypto code has been temporarily disabled on this CPU by the crypto |
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| 47 | * self-tests, in order to test the no-SIMD fallback code. This override is |
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| 48 | * currently limited to configurations where the "full" self-tests are enabled, |
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| 49 | * because it might be a bit too invasive to be part of the "fast" self-tests. |
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| 50 | */ |
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| 51 | #ifdef CONFIG_CRYPTO_SELFTESTS_FULL |
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| 52 | DECLARE_PER_CPU(bool, crypto_simd_disabled_for_test); |
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| 53 | #define crypto_simd_usable() \ |
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| 54 | (may_use_simd() && !this_cpu_read(crypto_simd_disabled_for_test)) |
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| 55 | #else |
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| 56 | #define crypto_simd_usable() may_use_simd() |
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| 57 | #endif |
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| 58 | |
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| 59 | #endif /* _CRYPTO_INTERNAL_SIMD_H */ |
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| 60 | |
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