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.w...@gmail.com> -- 2.17.1
