Messages in this thread | | | From | Luke Nelson <> | Subject | [PATCH bpf 0/2] bpf, arm: Small JIT optimizations | Date | Thu, 30 Apr 2020 19:02:08 -0700 |
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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
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