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| author | Jiong Wang <jiong.wang@netronome.com> | 2018-12-05 13:52:32 -0500 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2018-12-07 13:30:48 -0800 |
| commit | f860203b010ab11995b3073a96cc0d04e520129e (patch) | |
| tree | e04fbf2c4b2daffea61f26509656da68fd73b430 /arch/s390/net | |
| parent | 44cf43c04bb5f7c688608ff4136b13f2a8a7a129 (diff) | |
| download | linux-f860203b010ab11995b3073a96cc0d04e520129e.tar.gz linux-f860203b010ab11995b3073a96cc0d04e520129e.tar.bz2 linux-f860203b010ab11995b3073a96cc0d04e520129e.zip | |
s390: bpf: implement jitting of BPF_ALU | BPF_ARSH | BPF_*
This patch implements code-gen for BPF_ALU | BPF_ARSH | BPF_*.
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Jiong Wang <jiong.wang@netronome.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'arch/s390/net')
| -rw-r--r-- | arch/s390/net/bpf_jit_comp.c | 12 |
1 files changed, 12 insertions, 0 deletions
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; |