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(struct skcipher_alg *ialg, 18 const char *algname, 19 const char *drvname, 20 const char *basename); 21 void simd_skcipher_free(struct simd_skcipher_alg *alg); 22 23 int simd_register_skciphers_compat(struct skcipher_alg *algs, int count, 24 struct simd_skcipher_alg **simd_algs); 25 26 void simd_unregister_skciphers(struct skcipher_alg *algs, int count, 27 struct simd_skcipher_alg **simd_algs); 28 29 /* AEAD support */ 30 31 struct simd_aead_alg; 32 struct aead_alg; 33 34 int simd_register_aeads_compat(struct aead_alg *algs, int count, 35 struct simd_aead_alg **simd_algs); 36 37 void 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 54 DECLARE_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 */ 62