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

[Luke Nelson]

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 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>

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2.17.1