sparc: bpf_jit: add SKF_AD_PKTTYPE support to JIT

commit 233577a22089 ("net: filter: constify detection of pkt_type_offset")
allows us to implement simple PKTTYPE support in sparc JIT

Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/arch/sparc/net/bpf_jit_comp.c b/arch/sparc/net/bpf_jit_comp.c
index b2ad9dc..2dde48b 100644 (file)
--- a/arch/sparc/net/bpf_jit_comp.c
+++ b/arch/sparc/net/bpf_jit_comp.c
@@ -579,16 +579,11 @@ void bpf_jit_compile(struct bpf_prog *fp)
                        case BPF_ANC | SKF_AD_PROTOCOL:
                                emit_skb_load16(protocol, r_A);
                                break;
-#if 0
-                               /* GCC won't let us take the address of
-                                * a bit field even though we very much
-                                * know what we are doing here.
-                                */
                        case BPF_ANC | SKF_AD_PKTTYPE:
-                               __emit_skb_load8(pkt_type, r_A);
+                               __emit_skb_load8(__pkt_type_offset, r_A);
+                               emit_andi(r_A, PKT_TYPE_MAX, r_A);
                                emit_alu_K(SRL, 5);
                                break;
-#endif
                        case BPF_ANC | SKF_AD_IFINDEX:
                                emit_skb_loadptr(dev, r_A);
                                emit_cmpi(r_A, 0);