riscv, bpf: Support 32-bit offset jmp insn

Add support 32-bit offset jmp instruction for RV64.

Signed-off-by: Pu Lehui <pulehui@huawei.com>
Acked-by: Björn Töpel <bjorn@kernel.org>
Link: https://lore.kernel.org/r/20230824095001.3408573-5-pulehui@huaweicloud.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

diff --git a/arch/riscv/net/bpf_jit_comp64.c b/arch/riscv/net/bpf_jit_comp64.c
index bcf1e75..076619f 100644 (file)
--- a/arch/riscv/net/bpf_jit_comp64.c
+++ b/arch/riscv/net/bpf_jit_comp64.c
@@ -1327,7 +1327,11 @@ out_be:
 
        /* 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;