LXR linux/include/crypto/internal/simd.h

   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 */
  70