Hi Eric, Am Donnerstag, 27. April 2023, 00:55:50 CEST schrieb Eric Biggers: > On Wed, Mar 29, 2023 at 04:06:38PM +0200, Heiko Stuebner wrote: > > From: Heiko Stuebner <heiko.stuebner@xxxxxxxx> > > > > This was originally part of my vector crypto series, but was part > > of a separate openssl merge request implementing GCM ghash as using > > non-vector extensions. > > > > As that pull-request > > https://github.com/openssl/openssl/pull/20078 > > got merged recently into openssl, we could also check if this could > > go into the kernel as well and provide a base for further accelerated > > cryptographic support. > > One more question. It seems that this patchset uses the RISC-V scalar crypto > extensions. I've been hearing rumors that the RISC-V scalar crypto extensions > have been superseded by the vector crypto extensions. Is that accurate? I > wonder if it's worth putting effort into implementations that use the scalar > crypto extensions when they might already be obsolete. Yes there are the vector crypto extensions - still deep in the ratification process. And of course the RISC-V speciality, all extensions are separate entities that core manufacturers can select at will. And I guess the whole vector extension + vector-crypto extensions might require more investment for manufacturers, where the variants introduced here also "just" work with bitmanip instructions (Zbb + Zbc extensions). But for me, this small bit of scalar crypto is also sort of a stepping stone :-). Previous versions [0] already included patches using the vector crypto extensions too, I just split that into a separate thing, as _this_ series actually uses ratified extensions :-) Heiko [0] https://lore.kernel.org/lkml/20230313191302.580787-12-heiko.stuebner@xxxxxxxx/T/
