Commit 0f6cf4dd authored Oct 12, 2017 by Jakub Kicinski Committed by David S. Miller Oct 14, 2017

nfp: bpf: support BPF offload only on little endian



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.kicinski@netronome.com>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 3119d1fd

drivers/net/ethernet/netronome/nfp/bpf/main.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -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;
		}