From 1104247f3f97916f0afc29b73112c97affbfdbd2 Mon Sep 17 00:00:00 2001 From: Xu Kuohai Date: Tue, 15 Aug 2023 11:41:55 -0400 Subject: [PATCH] bpf, arm64: Support unconditional bswap Add JIT support for unconditional bswap instructions. Signed-off-by: Xu Kuohai Signed-off-by: Daniel Borkmann Tested-by: Florent Revest Acked-by: Florent Revest Link: https://lore.kernel.org/bpf/20230815154158.717901-5-xukuohai@huaweicloud.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 9b796e74ef42d..1d35acb880dc6 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) {