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
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