[PATCH bpf-next 4/7] bpf, arm64: Support unconditional bswap

Xu Kuohai
2023-08-15T15:21:12Z

Add jit support for unconditional bswap instructions.

Signed-off-by: Xu Kuohai <xukuohai@huawei.com>
---
arch/arm64/net/bpf_jit_comp.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/net/bpf_jit_comp.c b/arch/arm64/net/bpf_jit_comp.c
index 9b796e74ef42..1d35acb880dc 100644
--- a/arch/arm64/net/bpf_jit_comp.c
+++ b/arch/arm64/net/bpf_jit_comp.c
@@ -855,11 +855,12 @@ static int build_insn(const struct bpf_insn *insn, struct jit_ctx *ctx,
/* dst = BSWAP##imm(dst) */
case BPF_ALU | BPF_END | BPF_FROM_LE:
case BPF_ALU | BPF_END | BPF_FROM_BE:
+ case BPF_ALU64 | BPF_END | BPF_FROM_LE:
#ifdef CONFIG_CPU_BIG_ENDIAN
- if (BPF_SRC(code) == BPF_FROM_BE)
+ if (BPF_CLASS(code) == BPF_ALU && BPF_SRC(code) == BPF_FROM_BE)
goto emit_bswap_uxt;
#else /* !CONFIG_CPU_BIG_ENDIAN */
- if (BPF_SRC(code) == BPF_FROM_LE)
+ if (BPF_CLASS(code) == BPF_ALU && BPF_SRC(code) == BPF_FROM_LE)
goto emit_bswap_uxt;
#endif
switch (imm) {
--
2.30.2