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Date: Wed, 29 Oct 2014 13:21:06 +0400 From: Denis Kirjanov <kda@...ux-powerpc.org> To: linuxppc-dev@...abs.org Cc: Denis Kirjanov <kda@...ux-powerpc.org>, Matt Evans <matt@...abs.org>, netdev@...r.kernel.org Subject: Re: [PATCH] PPC: bpf_jit_comp: add SKF_AD_PKTTYPE instruction Any feedback from PPC folks? On 10/26/14, Denis Kirjanov <kda@...ux-powerpc.org> wrote: > Cc: Matt Evans <matt@...abs.org> > Signed-off-by: Denis Kirjanov <kda@...ux-powerpc.org> > --- > arch/powerpc/include/asm/ppc-opcode.h | 1 + > arch/powerpc/net/bpf_jit.h | 7 +++++++ > arch/powerpc/net/bpf_jit_comp.c | 5 +++++ > 3 files changed, 13 insertions(+) > > diff --git a/arch/powerpc/include/asm/ppc-opcode.h > b/arch/powerpc/include/asm/ppc-opcode.h > index 6f85362..1a52877 100644 > --- a/arch/powerpc/include/asm/ppc-opcode.h > +++ b/arch/powerpc/include/asm/ppc-opcode.h > @@ -204,6 +204,7 @@ > #define PPC_INST_ERATSX_DOT 0x7c000127 > > /* Misc instructions for BPF compiler */ > +#define PPC_INST_LBZ 0x88000000 > #define PPC_INST_LD 0xe8000000 > #define PPC_INST_LHZ 0xa0000000 > #define PPC_INST_LHBRX 0x7c00062c > diff --git a/arch/powerpc/net/bpf_jit.h b/arch/powerpc/net/bpf_jit.h > index 9aee27c..c406aa9 100644 > --- a/arch/powerpc/net/bpf_jit.h > +++ b/arch/powerpc/net/bpf_jit.h > @@ -87,6 +87,9 @@ DECLARE_LOAD_FUNC(sk_load_byte_msh); > #define PPC_STD(r, base, i) EMIT(PPC_INST_STD | ___PPC_RS(r) | \ > ___PPC_RA(base) | ((i) & 0xfffc)) > > + > +#define PPC_LBZ(r, base, i) EMIT(PPC_INST_LBZ | ___PPC_RT(r) | \ > + ___PPC_RA(base) | IMM_L(i)) > #define PPC_LD(r, base, i) EMIT(PPC_INST_LD | ___PPC_RT(r) | \ > ___PPC_RA(base) | IMM_L(i)) > #define PPC_LWZ(r, base, i) EMIT(PPC_INST_LWZ | ___PPC_RT(r) | \ > @@ -96,6 +99,10 @@ DECLARE_LOAD_FUNC(sk_load_byte_msh); > #define PPC_LHBRX(r, base, b) EMIT(PPC_INST_LHBRX | ___PPC_RT(r) | \ > ___PPC_RA(base) | ___PPC_RB(b)) > /* Convenience helpers for the above with 'far' offsets: */ > +#define PPC_LBZ_OFFS(r, base, i) do { if ((i) < 32768) PPC_LBZ(r, base, i); > \ > + else { PPC_ADDIS(r, base, IMM_HA(i)); \ > + PPC_LBZ(r, r, IMM_L(i)); } } while(0) > + > #define PPC_LD_OFFS(r, base, i) do { if ((i) < 32768) PPC_LD(r, base, i); > \ > else { PPC_ADDIS(r, base, IMM_HA(i)); \ > PPC_LD(r, r, IMM_L(i)); } } while(0) > diff --git a/arch/powerpc/net/bpf_jit_comp.c > b/arch/powerpc/net/bpf_jit_comp.c > index cbae2df..d110e28 100644 > --- a/arch/powerpc/net/bpf_jit_comp.c > +++ b/arch/powerpc/net/bpf_jit_comp.c > @@ -407,6 +407,11 @@ static int bpf_jit_build_body(struct bpf_prog *fp, u32 > *image, > PPC_LHZ_OFFS(r_A, r_skb, offsetof(struct sk_buff, > queue_mapping)); > break; > + case BPF_ANC | SKF_AD_PKTTYPE: > + PPC_LBZ_OFFS(r_A, r_skb, PKT_TYPE_OFFSET()); > + PPC_ANDI(r_A, r_A, PKT_TYPE_MAX); > + PPC_SRWI(r_A, r_A, 5); > + break; > case BPF_ANC | SKF_AD_CPU: > #ifdef CONFIG_SMP > /* > -- > 2.1.0 > > -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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