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