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authorLuke Nelson2020-05-05 17:03:18 -0700
committerDaniel Borkmann2020-05-06 09:48:15 +0200
commit21a099abb765c3754689e1f7ca4536fa560112d0 (patch)
treec6d2bc71c49617d48dd2d01a93821de4d6162349 /drivers/pci/irq.c
parent0224b2acea0f9e3908d33e27b2dcb4e04686e997 (diff)
bpf, riscv: Optimize FROM_LE using verifier_zext on RV64
This patch adds two optimizations for BPF_ALU BPF_END BPF_FROM_LE in the RV64 BPF JIT. First, it enables the verifier zero-extension optimization to avoid zero extension when imm == 32. Second, it avoids generating code for imm == 64, since it is equivalent to a no-op. Co-developed-by: Xi Wang <xi.wang@gmail.com> Signed-off-by: Xi Wang <xi.wang@gmail.com> Signed-off-by: Luke Nelson <luke.r.nels@gmail.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Reviewed-by: Björn Töpel <bjorn.topel@gmail.com> Acked-by: Björn Töpel <bjorn.topel@gmail.com> Link: https://lore.kernel.org/bpf/20200506000320.28965-3-luke.r.nels@gmail.com
Diffstat (limited to 'drivers/pci/irq.c')
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