simd.h (2293B)
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 14struct simd_skcipher_alg; 15struct skcipher_alg; 16 17struct simd_skcipher_alg *simd_skcipher_create_compat(const char *algname, 18 const char *drvname, 19 const char *basename); 20struct simd_skcipher_alg *simd_skcipher_create(const char *algname, 21 const char *basename); 22void simd_skcipher_free(struct simd_skcipher_alg *alg); 23 24int simd_register_skciphers_compat(struct skcipher_alg *algs, int count, 25 struct simd_skcipher_alg **simd_algs); 26 27void simd_unregister_skciphers(struct skcipher_alg *algs, int count, 28 struct simd_skcipher_alg **simd_algs); 29 30/* AEAD support */ 31 32struct simd_aead_alg; 33struct aead_alg; 34 35struct simd_aead_alg *simd_aead_create_compat(const char *algname, 36 const char *drvname, 37 const char *basename); 38struct simd_aead_alg *simd_aead_create(const char *algname, 39 const char *basename); 40void simd_aead_free(struct simd_aead_alg *alg); 41 42int simd_register_aeads_compat(struct aead_alg *algs, int count, 43 struct simd_aead_alg **simd_algs); 44 45void 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 62DECLARE_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 */