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| author | Jiong Wang <jiong.wang@netronome.com> | 2018-12-05 13:52:31 -0500 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2018-12-07 13:30:48 -0800 |
| commit | 44cf43c04bb5f7c688608ff4136b13f2a8a7a129 (patch) | |
| tree | a7e39324a8f6f584c9a4ba6832624efb17b15d16 /arch/powerpc/net | |
| parent | ee94b90c8acaa593b627f5f3fe93e076e7779f5c (diff) | |
| download | linux-0-day-44cf43c04bb5f7c688608ff4136b13f2a8a7a129.tar.gz linux-0-day-44cf43c04bb5f7c688608ff4136b13f2a8a7a129.tar.xz | |
ppc: bpf: implement jitting of BPF_ALU | BPF_ARSH | BPF_*
This patch implements code-gen for BPF_ALU | BPF_ARSH | BPF_*.
Cc: Naveen N. Rao <naveen.n.rao@linux.ibm.com>
Cc: Sandipan Das <sandipan@linux.ibm.com>
Signed-off-by: Jiong Wang <jiong.wang@netronome.com>
Reviewed-by: Sandipan Das <sandipan@linux.ibm.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'arch/powerpc/net')
| -rw-r--r-- | arch/powerpc/net/bpf_jit.h | 4 | ||||
| -rw-r--r-- | arch/powerpc/net/bpf_jit_comp64.c | 6 |
2 files changed, 10 insertions, 0 deletions
diff --git a/arch/powerpc/net/bpf_jit.h b/arch/powerpc/net/bpf_jit.h index 47fc6660845d3..c2d5192ed64fa 100644 --- a/arch/powerpc/net/bpf_jit.h +++ b/arch/powerpc/net/bpf_jit.h @@ -152,6 +152,10 @@ ___PPC_RS(a) | ___PPC_RB(s)) #define PPC_SRW(d, a, s) EMIT(PPC_INST_SRW | ___PPC_RA(d) | \ ___PPC_RS(a) | ___PPC_RB(s)) +#define PPC_SRAW(d, a, s) EMIT(PPC_INST_SRAW | ___PPC_RA(d) | \ + ___PPC_RS(a) | ___PPC_RB(s)) +#define PPC_SRAWI(d, a, i) EMIT(PPC_INST_SRAWI | ___PPC_RA(d) | \ + ___PPC_RS(a) | __PPC_SH(i)) #define PPC_SRD(d, a, s) EMIT(PPC_INST_SRD | ___PPC_RA(d) | \ ___PPC_RS(a) | ___PPC_RB(s)) #define PPC_SRAD(d, a, s) EMIT(PPC_INST_SRAD | ___PPC_RA(d) | \ diff --git a/arch/powerpc/net/bpf_jit_comp64.c b/arch/powerpc/net/bpf_jit_comp64.c index 17482f5de3e26..7dc81877057d8 100644 --- a/arch/powerpc/net/bpf_jit_comp64.c +++ b/arch/powerpc/net/bpf_jit_comp64.c @@ -529,9 +529,15 @@ static int bpf_jit_build_body(struct bpf_prog *fp, u32 *image, if (imm != 0) PPC_SRDI(dst_reg, dst_reg, imm); break; + case BPF_ALU | BPF_ARSH | BPF_X: /* (s32) dst >>= src */ + PPC_SRAW(dst_reg, dst_reg, src_reg); + goto bpf_alu32_trunc; case BPF_ALU64 | BPF_ARSH | BPF_X: /* (s64) dst >>= src */ PPC_SRAD(dst_reg, dst_reg, src_reg); break; + case BPF_ALU | BPF_ARSH | BPF_K: /* (s32) dst >>= imm */ + PPC_SRAWI(dst_reg, dst_reg, imm); + goto bpf_alu32_trunc; case BPF_ALU64 | BPF_ARSH | BPF_K: /* (s64) dst >>= imm */ if (imm != 0) PPC_SRADI(dst_reg, dst_reg, imm); |