On Tue, Apr 4, 2017 at 6:07 PM, Stephan Müller <smueller@xxxxxxxxxx> wrote: > Am Dienstag, 4. April 2017, 09:53:17 CEST schrieb Harsh Jain: > > Hi Harsh, > >> Hi, >> >> Do we have any guidelines documented to decide what should be the >> algorithm priority. Specially for authenc implementation.Most of the >> drivers have fixed priority for all algos. Problem comes in when we >> have cbc(aes), hmac(sha1) and authenc(cbc(aes),hmac(sha1)) >> implementation in driver. Base authenc driver gets more precedence >> because of higher priority(enc->base.cra_priority * 10 + >> auth_base->cra_priority;) >> >> What should be the priority of >> cbc(aes), >> hmac(sha1) >> authenc(cbc(aes),hmac(sha1)) > > There is no general rule about the actual numbers. But commonly, the prios are > set such that the prios of C implementations < ASM implementations < hardware > accelerators. The idea is to give users the fastest implementation there is > for his particular system. It means cbc, hmac should have smaller(nearly 10 times less) priority than their authenc implementation otherwise request will not offload to driver because sw authenc priority is (aes * 10 + hmac). > > Ciao > Stephan
