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| author | Luke Nelson <lukenels@cs.washington.edu> | 2020-05-06 03:03:19 +0300 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2020-05-06 10:48:15 +0300 |
| commit | ca349a6a104e58479defdc08ce56472a48f7cb81 (patch) | |
| tree | d597679f49d864c875930ea34c87350d7b230e88 /tools/perf/scripts/python/syscall-counts.py | |
| parent | 21a099abb765c3754689e1f7ca4536fa560112d0 (diff) | |
| download | linux-ca349a6a104e58479defdc08ce56472a48f7cb81.tar.xz | |
bpf, riscv: Optimize BPF_JMP BPF_K when imm == 0 on RV64
This patch adds an optimization to BPF_JMP (32- and 64-bit) BPF_K for
when the BPF immediate is zero.
When the immediate is zero, the code can directly use the RISC-V zero
register instead of loading a zero immediate to a temporary register
first.
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/20200506000320.28965-4-luke.r.nels@gmail.com
Diffstat (limited to 'tools/perf/scripts/python/syscall-counts.py')
0 files changed, 0 insertions, 0 deletions