On Mon, Aug 21, 2023 at 12:47:11PM -0700, Jakub Kicinski wrote: > On Sat, 19 Aug 2023 18:41:30 -0700 Yonghong Song wrote: > > Hi, > > > > A new set of bpf insns have been recently added in llvm with flag > > [-mcpu=v4](https://reviews.llvm.org/D144829). In the kernel, > > x86_64 and arm64 have implemented -mcpu=v4 support: > > x86_64: > > https://lore.kernel.org/all/20230728011143.3710005-1-yonghong.song@xxxxxxxxx/ > > arm64: > > https://lore.kernel.org/bpf/20230815154158.717901-1-xukuohai@xxxxxxxxxxxxxxx/ > > > > The following arch's do not have -mcpu=v4 support yet: > > arm, mips, nfp, powerpc, riscv, sc90, sparc and x86_32 > > > > If you have a chance, could you take a look at what > > x86_64/arm64 does and add support to the above arch'es? > > Louis, is anyone on your side still working on BPF for NFP? > div/mod and the jump will be impossible but there may be instructions > for sign extend or bswap? There isn't a lot of activity on the BPF side for nfp, but here and there some things do get addressed. I will run it past the team, it does seem like those might be possible with the architecture - thanks for the ping.
