Hello On Mon, May 25, 2020 at 12:14:54PM +0100, Rui Salvaterra wrote: > > If someone is willing to implement mt76 approach to have HW encryption offload > > for MFP+CCMP, I'll be happy to review patch. From other hand, most people will > > use MFP with modern ciphers anyway, so I'm not sure how much need is for such > > patch. > > I've been having a look at how mt76 solves the problem, but I haven't > fully understood it yet. I feel it's out of my league, since I only > started looking at wireless drivers very recently (I don't grasp all > the concepts and the architecture). Yeah, it's somewhat complicated. > But one thing that also bugs me > about software fallbacks is that for most of the older CPUs we don't > have SIMD implementations of the required crypto. So, not only we fall > back to software, but we're also stuck with scalar C algorithms on > CPUs which are already slow. If we talk about x86, we have AES-NI instructions since 2008: https://en.wikipedia.org/wiki/AES_instruction_set Which make CPU crypto quite fast. Though it can be a bottleneck, I think, if wifi encryption is performed together with other encryption applications like SSL . Stanislaw
