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From:   Luke Nelson <lukenels@cs.washington.edu>
To:     bpf@vger.kernel.org
Cc:     Luke Nelson <luke.r.nels@gmail.com>,
        Shubham Bansal <illusionist.neo@gmail.com>,
        Russell King <linux@armlinux.org.uk>,
        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-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: [PATCH bpf 0/2] bpf, arm: Small JIT optimizations
Date:   Thu, 30 Apr 2020 19:02:08 -0700
Message-Id: <20200501020210.32294-1-luke.r.nels@gmail.com>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

As Daniel suggested to us, we ran our formal verification tool, Serval,
over the arm JIT. The bugs we found have been patched and applied to the
bpf tree [1, 2]. This patch series introduces two small optimizations
that simplify the JIT and use fewer instructions.

[1] https://lore.kernel.org/bpf/20200408181229.10909-1-luke.r.nels@gmail.com/
[2] https://lore.kernel.org/bpf/20200409221752.28448-1-luke.r.nels@gmail.com/

Luke Nelson (2):
  bpf, arm: Optimize emit_a32_arsh_r64 using conditional instruction
  bpf, arm: Optimize ALU ARSH K using asr immediate instruction

 arch/arm/net/bpf_jit_32.c | 14 +++++++++-----
 arch/arm/net/bpf_jit_32.h |  2 ++
 2 files changed, 11 insertions(+), 5 deletions(-)

-- 
2.17.1