On Fri, Nov 25, 2022 at 09:59:17AM +0100, Ard Biesheuvel wrote: > > On arm64, this is implemented in an assembler macro 'cond_yield' so we > don't need to preserve/restore the SIMD state state at all if the > yield is not going to result in a call to schedule(). For example, the > SHA3 code keeps 400 bytes of state in registers, which we don't want > to save and reload unless needed. (5f6cb2e617681 'crypto: > arm64/sha512-ce - simplify NEON yield') Yes this would be optimally done from the assembly code which would make a difference if they benefited from larger block sizes. Cheers, -- Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
