powerpc/bpf: BPF JIT compiler for 64-bit Little Endian

This enables the Berkeley Packet Filter JIT compiler
for the PowerPC running in 64bit Little Endian.

Signed-off-by: Philippe Bergheaud <felix@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 2 insertions, 15 deletions

diff --git a/arch/powerpc/net/bpf_jit_comp.c b/arch/powerpc/net/bpf_jit_comp.c
index bf56e33f8257..81cd6c79babe 100644
--- a/arch/powerpc/net/bpf_jit_comp.c
+++ b/arch/powerpc/net/bpf_jit_comp.c
@@ -17,14 +17,8 @@
 
 #include "bpf_jit.h"
 
-#ifndef __BIG_ENDIAN
-/* There are endianness assumptions herein. */
-#error "Little-endian PPC not supported in BPF compiler"
-#endif
-
 int bpf_jit_enable __read_mostly;
 
-
 static inline void bpf_flush_icache(void *start, void *end)
 {
         smp_wmb();
@@ -346,18 +340,11 @@ static int bpf_jit_build_body(struct sk_filter *fp, u32 *image,
                         break;
 
                         /*** Ancillary info loads ***/
-
-                        /* None of the BPF_S_ANC* codes appear to be passed by
-                         * sk_chk_filter().  The interpreter and the x86 BPF
-                         * compiler implement them so we do too -- they may be
-                         * planted in future.
-                         */
                 case BPF_S_ANC_PROTOCOL: /* A = ntohs(skb->protocol); */
                         BUILD_BUG_ON(FIELD_SIZEOF(struct sk_buff,
                                                   protocol) != 2);
-                        PPC_LHZ_OFFS(r_A, r_skb, offsetof(struct sk_buff,
-                                                          protocol));
-                        /* ntohs is a NOP with BE loads. */
+                        PPC_NTOHS_OFFS(r_A, r_skb, offsetof(struct sk_buff,
+                                                            protocol));
                         break;
                 case BPF_S_ANC_IFINDEX:
                         PPC_LD_OFFS(r_scratch1, r_skb, offsetof(struct sk_buff,