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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>
This commit is contained in:
Pu Lehui 2023-08-24 09:49:58 +00:00 committed by Alexei Starovoitov
parent 694896ad3c
commit d9839f16c1
1 changed files with 5 additions and 1 deletions
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6
arch/riscv/net/bpf_jit_comp64.c
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@ -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;