[PATCH net-next 07/12] nfp: bpf: support BPF offload only on little endian

[Jakub Kicinski]

eBPF is host-endian specific.  Translating both BE and LE eBPF
to the NFP is feasible, but would require quite a bit of indirection.
The fact that I don't have access to any BE hosts that would fit
a 25G/40G/100G NIC is also limiting my ability to test big endian.

For now restrict the offload to little endian hosts only.

Signed-off-by: Jakub Kicinski <jakub.kicin...@netronome.com>
Reviewed-by: Simon Horman <simon.hor...@netronome.com>
---
 drivers/net/ethernet/netronome/nfp/bpf/main.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/ethernet/netronome/nfp/bpf/main.c 
b/drivers/net/ethernet/netronome/nfp/bpf/main.c
index 074726980994..6e74f8db1cc1 100644
--- a/drivers/net/ethernet/netronome/nfp/bpf/main.c
+++ b/drivers/net/ethernet/netronome/nfp/bpf/main.c
@@ -42,9 +42,11 @@
 
 static bool nfp_net_ebpf_capable(struct nfp_net *nn)
 {
+#ifdef __LITTLE_ENDIAN
        if (nn->cap & NFP_NET_CFG_CTRL_BPF &&
            nn_readb(nn, NFP_NET_CFG_BPF_ABI) == NFP_NET_BPF_ABI)
                return true;
+#endif
        return false;
 }
 
-- 
2.14.1