From: Hengqi Chen <hengqi.chen@gmail.com>
Date: Wed, 8 Nov 2023 06:12:16 +0000 (+0800)
Subject: LoongArch: BPF: Support unconditional bswap instructions
X-Git-Tag: ceph-for-6.8-rc1~249^2~4
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=4ebf9216e7dff0b38e350007da3b03afb15c816b;p=ceph-client.git

LoongArch: BPF: Support unconditional bswap instructions

Add support for unconditional bswap instruction. Since LoongArch is
always little-endian, just treat unconditional bswap the same as big-
endian conversion.

Signed-off-by: Hengqi Chen <hengqi.chen@gmail.com>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
---

diff --git a/arch/loongarch/net/bpf_jit.c b/arch/loongarch/net/bpf_jit.c
index ac9edf02675c..a8be6d4b058c 100644
--- a/arch/loongarch/net/bpf_jit.c
+++ b/arch/loongarch/net/bpf_jit.c
@@ -731,6 +731,7 @@ static int build_insn(const struct bpf_insn *insn, struct jit_ctx *ctx, bool ext
 		break;
 
 	case BPF_ALU | BPF_END | BPF_FROM_BE:
+	case BPF_ALU64 | BPF_END | BPF_FROM_LE:
 		switch (imm) {
 		case 16:
 			emit_insn(ctx, revb2h, dst, dst);