On Tue, 18 Feb 2025 at 04:43, Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> wrote: > > On Mon, Feb 17, 2025 at 09:40:32AM -0800, Jakub Kicinski wrote: > > > > Yes, that's true for tunnels and for IPsec. > > TLS does crypto in sendmsg/recvmsg, process context. > > OK that's good to know. So whether SIMD is always allowed or > not won't impact TLS at least. > And for IPsec, I'd assume that the cryptd fallback is only needed when TX and RX are competing for the same CPU. So for modern systems, I don't think the SIMD helper does anything useful, and we should just remove it, especially if we can relax the softirq/preemption rules for kernel SIMD on x86 like I did for arm64.
