From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ozlabs.org (ozlabs.org [103.22.144.67]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 90F221A01EB for ; Thu, 30 Oct 2014 17:39:45 +1100 (AEDT) Received: from mail-la0-f53.google.com (mail-la0-f53.google.com [209.85.215.53]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id B5693140081 for ; Thu, 30 Oct 2014 17:39:43 +1100 (AEDT) Received: by mail-la0-f53.google.com with SMTP id mc6so3882424lab.12 for ; Wed, 29 Oct 2014 23:39:40 -0700 (PDT) From: Denis Kirjanov To: netdev@vger.kernel.org Subject: [PATCH v2] PPC: bpf_jit_comp: add SKF_AD_PKTTYPE instruction Date: Thu, 30 Oct 2014 09:12:15 +0300 Message-Id: <1414649535-3956-1-git-send-email-kda@linux-powerpc.org> Cc: linuxppc-dev@ozlabs.org, Denis Kirjanov , Alexei Starovoitov , Matt Evans List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Add BPF extension SKF_AD_PKTTYPE to ppc JIT to load skb->pkt_type field. Before: [ 88.262622] test_bpf: #11 LD_IND_NET 86 97 99 PASS [ 88.265740] test_bpf: #12 LD_PKTTYPE 109 107 PASS After: [ 80.605964] test_bpf: #11 LD_IND_NET 44 40 39 PASS [ 80.607370] test_bpf: #12 LD_PKTTYPE 9 9 PASS CC: Alexei Starovoitov CC: Michael Ellerman Cc: Matt Evans Signed-off-by: Denis Kirjanov v2: Added test rusults --- 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