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| author |   Jiong Wang <jiong.wang@netronome.com> | 2019-02-22 22:36:04 +0000 |
|---|---|---|
| committer |   Daniel Borkmann <daniel@iogearbox.net> | 2019-02-23 00:07:47 +0100 |
| commit | f036ebd9bfbe1e91a3d855e85e05fc5ff156b641 (patch) | |
| tree | b676669c186253e4a40026c2f70da6b88b5bf933 /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | nfp: bpf: fix code-gen bug on BPF_ALU | BPF_XOR | BPF_K (diff) | |
| download | linux-dev-f036ebd9bfbe1e91a3d855e85e05fc5ff156b641.tar.xz linux-dev-f036ebd9bfbe1e91a3d855e85e05fc5ff156b641.zip | |
nfp: bpf: fix ALU32 high bits clearance bug
NFP BPF JIT compiler is doing a couple of small optimizations when jitting
ALU imm instructions, some of these optimizations could save code-gen, for
example:
A & -1 = A
A | 0 = A
A ^ 0 = A
However, for ALU32, high 32-bit of the 64-bit register should still be
cleared according to ISA semantics.
Fixes: cd7df56ed3e6 ("nfp: add BPF to NFP code translator")
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Jiong Wang <jiong.wang@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to '')
0 files changed, 0 insertions, 0 deletions