| Message ID | 1415253755-4001-1-git-send-email-kda@linux-powerpc.org |
|---|---|
| State | Changes Requested, archived |
| Delegated to: | David Miller |
| Headers | show |
From: Denis Kirjanov <kda@linux-powerpc.org> Date: Thu, 6 Nov 2014 09:02:35 +0300 > Add BPF extension SKF_AD_HATYPE to ppc JIT to check > the hw type of the interface > > JIT off: > [ 69.106783] test_bpf: #20 LD_HATYPE 48 48 PASS > JIT on: > [ 64.721757] test_bpf: #20 LD_HATYPE 7 6 PASS > > CC: Alexei Starovoitov<alexei.starovoitov@gmail.com> > CC: Daniel Borkmann<dborkman@redhat.com> > CC: Philippe Bergheaud<felix@linux.vnet.ibm.com> > Signed-off-by: Denis Kirjanov <kda@linux-powerpc.org> Can I get some reviews please? Thanks. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Wed, Nov 5, 2014 at 10:02 PM, Denis Kirjanov <kda@linux-powerpc.org> wrote: > Add BPF extension SKF_AD_HATYPE to ppc JIT to check > the hw type of the interface > > JIT off: > [ 69.106783] test_bpf: #20 LD_HATYPE 48 48 PASS > JIT on: > [ 64.721757] test_bpf: #20 LD_HATYPE 7 6 PASS > > CC: Alexei Starovoitov<alexei.starovoitov@gmail.com> > CC: Daniel Borkmann<dborkman@redhat.com> > CC: Philippe Bergheaud<felix@linux.vnet.ibm.com> > Signed-off-by: Denis Kirjanov <kda@linux-powerpc.org> > --- > arch/powerpc/net/bpf_jit_comp.c | 16 ++++++++++++++++ > 1 file changed, 16 insertions(+) > > diff --git a/arch/powerpc/net/bpf_jit_comp.c b/arch/powerpc/net/bpf_jit_comp.c > index d110e28..8bf4fc2 100644 > --- a/arch/powerpc/net/bpf_jit_comp.c > +++ b/arch/powerpc/net/bpf_jit_comp.c > @@ -412,6 +412,22 @@ static int bpf_jit_build_body(struct bpf_prog *fp, u32 *image, > PPC_ANDI(r_A, r_A, PKT_TYPE_MAX); > PPC_SRWI(r_A, r_A, 5); > break; > + case BPF_ANC | SKF_AD_HATYPE: > + BUILD_BUG_ON(FIELD_SIZEOF(struct net_device, type) != 2); > + PPC_LD_OFFS(r_scratch1, r_skb, offsetof(struct sk_buff, > + dev)); > + PPC_CMPDI(r_scratch1, 0); > + if (ctx->pc_ret0 != -1) { > + PPC_BCC(COND_EQ, addrs[ctx->pc_ret0]); > + } else { > + /* Exit, returning 0; first pass hits here. */ > + PPC_BCC_SHORT(COND_NE, (ctx->idx*4)+12); please use canonical formatting ctx->idx * 4 + 12 > + PPC_LI(r_ret, 0); > + PPC_JMP(exit_addr); > + } > + PPC_LHZ_OFFS(r_A, r_scratch1, > + offsetof(struct net_device, type)); the whole thing looks like copy paste from 'case ifindex'. Would be nice to handle them together to reduce duplicated code, sine only last load is different. Also in commit log please do _both_ runs with JIT on. You should see a difference before/after applying this patch. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/arch/powerpc/net/bpf_jit_comp.c b/arch/powerpc/net/bpf_jit_comp.c index d110e28..8bf4fc2 100644 --- a/arch/powerpc/net/bpf_jit_comp.c +++ b/arch/powerpc/net/bpf_jit_comp.c @@ -412,6 +412,22 @@ static int bpf_jit_build_body(struct bpf_prog *fp, u32 *image, PPC_ANDI(r_A, r_A, PKT_TYPE_MAX); PPC_SRWI(r_A, r_A, 5); break; + case BPF_ANC | SKF_AD_HATYPE: + BUILD_BUG_ON(FIELD_SIZEOF(struct net_device, type) != 2); + PPC_LD_OFFS(r_scratch1, r_skb, offsetof(struct sk_buff, + dev)); + PPC_CMPDI(r_scratch1, 0); + if (ctx->pc_ret0 != -1) { + PPC_BCC(COND_EQ, addrs[ctx->pc_ret0]); + } else { + /* Exit, returning 0; first pass hits here. */ + PPC_BCC_SHORT(COND_NE, (ctx->idx*4)+12); + PPC_LI(r_ret, 0); + PPC_JMP(exit_addr); + } + PPC_LHZ_OFFS(r_A, r_scratch1, + offsetof(struct net_device, type)); + break; case BPF_ANC | SKF_AD_CPU: #ifdef CONFIG_SMP /*
Add BPF extension SKF_AD_HATYPE to ppc JIT to check the hw type of the interface JIT off: [ 69.106783] test_bpf: #20 LD_HATYPE 48 48 PASS JIT on: [ 64.721757] test_bpf: #20 LD_HATYPE 7 6 PASS CC: Alexei Starovoitov<alexei.starovoitov@gmail.com> CC: Daniel Borkmann<dborkman@redhat.com> CC: Philippe Bergheaud<felix@linux.vnet.ibm.com> Signed-off-by: Denis Kirjanov <kda@linux-powerpc.org> --- arch/powerpc/net/bpf_jit_comp.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+)