From f860203b010ab11995b3073a96cc0d04e520129e Mon Sep 17 00:00:00 2001 From: Jiong Wang Date: Wed, 5 Dec 2018 13:52:32 -0500 Subject: [PATCH] s390: bpf: implement jitting of BPF_ALU | BPF_ARSH | BPF_* This patch implements code-gen for BPF_ALU | BPF_ARSH | BPF_*. Cc: Martin Schwidefsky Cc: Heiko Carstens Signed-off-by: Jiong Wang Signed-off-by: Alexei Starovoitov --- arch/s390/net/bpf_jit_comp.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/arch/s390/net/bpf_jit_comp.c b/arch/s390/net/bpf_jit_comp.c index d7052cbe984f..3ff758eeb71d 100644 --- a/arch/s390/net/bpf_jit_comp.c +++ b/arch/s390/net/bpf_jit_comp.c @@ -821,10 +821,22 @@ static noinline int bpf_jit_insn(struct bpf_jit *jit, struct bpf_prog *fp, int i /* * BPF_ARSH */ + case BPF_ALU | BPF_ARSH | BPF_X: /* ((s32) dst) >>= src */ + /* sra %dst,%dst,0(%src) */ + EMIT4_DISP(0x8a000000, dst_reg, src_reg, 0); + EMIT_ZERO(dst_reg); + break; case BPF_ALU64 | BPF_ARSH | BPF_X: /* ((s64) dst) >>= src */ /* srag %dst,%dst,0(%src) */ EMIT6_DISP_LH(0xeb000000, 0x000a, dst_reg, dst_reg, src_reg, 0); break; + case BPF_ALU | BPF_ARSH | BPF_K: /* ((s32) dst >> imm */ + if (imm == 0) + break; + /* sra %dst,imm(%r0) */ + EMIT4_DISP(0x8a000000, dst_reg, REG_0, imm); + EMIT_ZERO(dst_reg); + break; case BPF_ALU64 | BPF_ARSH | BPF_K: /* ((s64) dst) >>= imm */ if (imm == 0) break;