diff options
| author | Hengqi Chen <hengqi.chen@gmail.com> | 2023-11-08 14:12:16 +0800 |
|---|---|---|
| committer | Huacai Chen <chenhuacai@loongson.cn> | 2023-11-08 14:12:16 +0800 |
| commit | 9ddd2b8d1a8b566195c196fe4249d04cd75cc73c (patch) | |
| tree | 47c7650b2683a3de986868e04771572b9df316ce /arch/loongarch | |
| parent | 4ebf9216e7dff0b38e350007da3b03afb15c816b (diff) | |
| download | linux-9ddd2b8d1a8b566195c196fe4249d04cd75cc73c.tar.gz | |
LoongArch: BPF: Support 32-bit offset jmp instructions
Add support for 32-bit offset jmp instruction. Currently, we use b
instruction which supports range within ±128MB for such jumps. This
should be large enough for BPF progs.
Signed-off-by: Hengqi Chen <hengqi.chen@gmail.com>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Diffstat (limited to 'arch/loongarch')
| -rw-r--r-- | arch/loongarch/net/bpf_jit.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/loongarch/net/bpf_jit.c b/arch/loongarch/net/bpf_jit.c index a8be6d4b058cd..050fcf233a34a 100644 --- a/arch/loongarch/net/bpf_jit.c +++ b/arch/loongarch/net/bpf_jit.c @@ -848,7 +848,11 @@ static int build_insn(const struct bpf_insn *insn, struct jit_ctx *ctx, bool ext /* PC += off */ case BPF_JMP | BPF_JA: - jmp_offset = bpf2la_offset(i, off, ctx); + case BPF_JMP32 | BPF_JA: + if (BPF_CLASS(code) == BPF_JMP) + jmp_offset = bpf2la_offset(i, off, ctx); + else + jmp_offset = bpf2la_offset(i, imm, ctx); if (emit_uncond_jmp(ctx, jmp_offset) < 0) goto toofar; break; |