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From:   Pu Lehui <pulehui@huaweicloud.com>
To:     linux-riscv@lists.infradead.org, bpf@vger.kernel.org,
        netdev@vger.kernel.org, linux-kernel@vger.kernel.org
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        Yonghong Song <yhs@fb.com>,
        Alexei Starovoitov <ast@kernel.org>,
        Daniel Borkmann <daniel@iogearbox.net>,
        Andrii Nakryiko <andrii@kernel.org>,
        Martin KaFai Lau <martin.lau@linux.dev>,
        Song Liu <song@kernel.org>,
        John Fastabend <john.fastabend@gmail.com>,
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        Stanislav Fomichev <sdf@google.com>,
        Hao Luo <haoluo@google.com>, Jiri Olsa <jolsa@kernel.org>,
        Palmer Dabbelt <palmer@dabbelt.com>,
        Xu Kuohai <xukuohai@huawei.com>,
        Puranjay Mohan <puranjay12@gmail.com>,
        Pu Lehui <pulehui@huawei.com>,
        Pu Lehui <pulehui@huaweicloud.com>
Subject: [PATCH bpf-next 4/7] riscv, bpf: Support 32-bit offset jmp insn
Date:   Wed, 23 Aug 2023 23:10:56 +0000
Message-Id: <20230823231059.3363698-5-pulehui@huaweicloud.com>
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From: Pu Lehui <pulehui@huawei.com>

Add support 32-bit offset jmp instruction for RV64.

Signed-off-by: Pu Lehui <pulehui@huawei.com>
---
 arch/riscv/net/bpf_jit_comp64.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/arch/riscv/net/bpf_jit_comp64.c b/arch/riscv/net/bpf_jit_comp64.c
index d1497182cacf..3d4e9182385d 100644
--- a/arch/riscv/net/bpf_jit_comp64.c
+++ b/arch/riscv/net/bpf_jit_comp64.c
@@ -1327,7 +1327,11 @@ int bpf_jit_emit_insn(const struct bpf_insn *insn, struct rv_jit_context *ctx,
 
 	/* JUMP off */
 	case BPF_JMP | BPF_JA:
-		rvoff = rv_offset(i, off, ctx);
+	case BPF_JMP32 | BPF_JA:
+		if (BPF_CLASS(code) == BPF_JMP)
+			rvoff = rv_offset(i, off, ctx);
+		else
+			rvoff = rv_offset(i, imm, ctx);
 		ret = emit_jump_and_link(RV_REG_ZERO, rvoff, true, ctx);
 		if (ret)
 			return ret;
-- 
2.39.2