Re: [PATCH bpf-next 0/4] RV64 BPF JIT Optimizations

[BjÃrn TÃpel]

On Wed, 6 May 2020 at 02:03, Luke Nelson <lukenels@xxxxxxxxxxxxxxxxx> wrote:
>
> This patch series introduces a set of optimizations to the BPF JIT
> on RV64. The optimizations are related to the verifier zero-extension
> optimization and BPF_JMP BPF_K.
>
> We tested the optimizations on a QEMU riscv64 virt machine, using
> lib/test_bpf and test_verifier, and formally verified their correctness
> using Serval.
>

Luke and Xi,

Thanks a lot for working on this! Very nice series!

For the series:
Reviewed-by: BjÃrn TÃpel <bjorn.topel@xxxxxxxxx>
Acked-by: BjÃrn TÃpel <bjorn.topel@xxxxxxxxx>

> Luke Nelson (4):
>   bpf, riscv: Enable missing verifier_zext optimizations on RV64
>   bpf, riscv: Optimize FROM_LE using verifier_zext on RV64
>   bpf, riscv: Optimize BPF_JMP BPF_K when imm == 0 on RV64
>   bpf, riscv: Optimize BPF_JSET BPF_K using andi on RV64
>
>  arch/riscv/net/bpf_jit_comp64.c | 64 ++++++++++++++++++++++-----------
>  1 file changed, 44 insertions(+), 20 deletions(-)
>
> Cc: Xi Wang <xi.wang@xxxxxxxxx>
>
> --
> 2.17.1
>