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From:   Luke Nelson <lukenels@cs.washington.edu>
To:     bpf@vger.kernel.org
Cc:     Luke Nelson <luke.r.nels@gmail.com>, Xi Wang <xi.wang@gmail.com>,
        =?UTF-8?q?Bj=C3=B6rn=20T=C3=B6pel?= <bjorn.topel@gmail.com>,
        Paul Walmsley <paul.walmsley@sifive.com>,
        Palmer Dabbelt <palmer@dabbelt.com>,
        Albert Ou <aou@eecs.berkeley.edu>,
        Alexei Starovoitov <ast@kernel.org>,
        Daniel Borkmann <daniel@iogearbox.net>,
        Martin KaFai Lau <kafai@fb.com>,
        Song Liu <songliubraving@fb.com>, Yonghong Song <yhs@fb.com>,
        Andrii Nakryiko <andriin@fb.com>,
        John Fastabend <john.fastabend@gmail.com>,
        KP Singh <kpsingh@chromium.org>, netdev@vger.kernel.org,
        linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: [PATCH bpf-next 0/4] RV64 BPF JIT Optimizations
Date:   Tue,  5 May 2020 17:03:16 -0700
Message-Id: <20200506000320.28965-1-luke.r.nels@gmail.com>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

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@gmail.com>

-- 
2.17.1