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Date: Tue, 5 May 2020 17:03:16 -0700 From: Luke Nelson <lukenels@...washington.edu> To: bpf@...r.kernel.org Cc: Luke Nelson <luke.r.nels@...il.com>, Xi Wang <xi.wang@...il.com>, Björn Töpel <bjorn.topel@...il.com>, Paul Walmsley <paul.walmsley@...ive.com>, Palmer Dabbelt <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>, Alexei Starovoitov <ast@...nel.org>, Daniel Borkmann <daniel@...earbox.net>, Martin KaFai Lau <kafai@...com>, Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>, Andrii Nakryiko <andriin@...com>, John Fastabend <john.fastabend@...il.com>, KP Singh <kpsingh@...omium.org>, netdev@...r.kernel.org, linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org Subject: [PATCH bpf-next 0/4] RV64 BPF JIT Optimizations 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@...il.com> -- 2.17.1
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