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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Shared crypto simd helpers
*/
#ifndef _CRYPTO_INTERNAL_SIMD_H
#define _CRYPTO_INTERNAL_SIMD_H
#include <linux/percpu.h>
#include <linux/types.h>
/* skcipher support */
struct simd_skcipher_alg;
struct skcipher_alg;
struct simd_skcipher_alg *simd_skcipher_create_compat(const char *algname,
const char *drvname,
const char *basename);
struct simd_skcipher_alg *simd_skcipher_create(const char *algname,
const char *basename);
void simd_skcipher_free(struct simd_skcipher_alg *alg);
int simd_register_skciphers_compat(struct skcipher_alg *algs, int count,
struct simd_skcipher_alg **simd_algs);
void simd_unregister_skciphers(struct skcipher_alg *algs, int count,
struct simd_skcipher_alg **simd_algs);
/* AEAD support */
struct simd_aead_alg;
struct aead_alg;
struct simd_aead_alg *simd_aead_create_compat(const char *algname,
const char *drvname,
const char *basename);
struct simd_aead_alg *simd_aead_create(const char *algname,
const char *basename);
void simd_aead_free(struct simd_aead_alg *alg);
int simd_register_aeads_compat(struct aead_alg *algs, int count,
struct simd_aead_alg **simd_algs);
void simd_unregister_aeads(struct aead_alg *algs, int count,
struct simd_aead_alg **simd_algs);
/*
* crypto_simd_usable() - is it allowed at this time to use SIMD instructions or
* access the SIMD register file?
*
* This delegates to may_use_simd(), except that this also returns false if SIMD
* in crypto code has been temporarily disabled on this CPU by the crypto
* self-tests, in order to test the no-SIMD fallback code. This override is
* currently limited to configurations where the extra self-tests are enabled,
* because it might be a bit too invasive to be part of the regular self-tests.
*
* This is a macro so that <asm/simd.h>, which some architectures don't have,
* doesn't have to be included directly here.
*/
#ifdef CONFIG_CRYPTO_MANAGER_EXTRA_TESTS
DECLARE_PER_CPU(bool, crypto_simd_disabled_for_test);
#define crypto_simd_usable() \
(may_use_simd() && !this_cpu_read(crypto_simd_disabled_for_test))
#else
#define crypto_simd_usable() may_use_simd()
#endif
#endif /* _CRYPTO_INTERNAL_SIMD_H */
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