root/include/crypto/internal/simd.h

INCLUDED FROM

   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 */