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crypto: api - Introduce notifier for new crypto algorithms

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Introduce a facility that can be used to receive a notification
callback when a new algorithm becomes available. This can be used by
existing crypto registrations to trigger a switch from a software-only
algorithm to a hardware-accelerated version.

A new CRYPTO_MSG_ALG_LOADED state is introduced to the existing crypto
notification chain, and the register/unregister functions are exported
so they can be called by subsystems outside of crypto.

Signed-off-by: Martin K. Petersen <[email protected]>
Suggested-by: Herbert Xu <[email protected]>
Signed-off-by: Martin K. Petersen <[email protected]>
Signed-off-by: Herbert Xu <[email protected]>
This commit is contained in:
Martin K. Petersen 2018-08-30 11:00:14 -04:00 • committed by Herbert Xu
commit dd8b083f9a
4 changed files with 14 additions and 8 deletions
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10
include/crypto/algapi.h
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@ -427,4 +427,14 @@ static inline void crypto_yield(u32 flags)
#endif
}
int crypto_register_notifier(struct notifier_block *nb);
int crypto_unregister_notifier(struct notifier_block *nb);
/* Crypto notification events. */
enum {
CRYPTO_MSG_ALG_REQUEST,
CRYPTO_MSG_ALG_REGISTER,
CRYPTO_MSG_ALG_LOADED,
};
#endif /* _CRYPTO_ALGAPI_H */