From 44cf43c04bb5f7c688608ff4136b13f2a8a7a129 Mon Sep 17 00:00:00 2001 From: Jiong Wang Date: Wed, 5 Dec 2018 13:52:31 -0500 Subject: [PATCH] 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 Cc: Sandipan Das Signed-off-by: Jiong Wang Reviewed-by: Sandipan Das Signed-off-by: Alexei Starovoitov --- arch/powerpc/include/asm/ppc-opcode.h | 2 ++ arch/powerpc/net/bpf_jit.h | 4 ++++ arch/powerpc/net/bpf_jit_comp64.c | 6 ++++++ 3 files changed, 12 insertions(+) diff --git a/arch/powerpc/include/asm/ppc-opcode.h b/arch/powerpc/include/asm/ppc-opcode.h index a6e9e314c707..901459226eca 100644 --- a/arch/powerpc/include/asm/ppc-opcode.h +++ b/arch/powerpc/include/asm/ppc-opcode.h @@ -342,6 +342,8 @@ #define PPC_INST_SLW 0x7c000030 #define PPC_INST_SLD 0x7c000036 #define PPC_INST_SRW 0x7c000430 +#define PPC_INST_SRAW 0x7c000630 +#define PPC_INST_SRAWI 0x7c000670 #define PPC_INST_SRD 0x7c000436 #define PPC_INST_SRAD 0x7c000634 #define PPC_INST_SRADI 0x7c000674 diff --git a/arch/powerpc/net/bpf_jit.h b/arch/powerpc/net/bpf_jit.h index 47fc6660845d..c2d5192ed64f 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 17482f5de3e2..7dc81877057d 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); -- GitLab