nfp: bpf: round up the size of the stack

Kernel enforces the alignment of the bottom of the stack, NFP
deals with positive offsets better so we should align the top
of the stack.  Round the stack size to NFP word size (4B).

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>

diff --git a/drivers/net/ethernet/netronome/nfp/bpf/offload.c b/drivers/net/ethernet/netronome/nfp/bpf/offload.c
index fa2905e67b073c3853e3741d7fccecd26586a532..8dbf13450bab6aa8f994cf06b0e1eccd55476016 100644 (file)
--- a/drivers/net/ethernet/netronome/nfp/bpf/offload.c
+++ b/drivers/net/ethernet/netronome/nfp/bpf/offload.c
@@ -147,7 +147,7 @@ int nfp_bpf_translate(struct nfp_app *app, struct nfp_net *nn,
                return -EOPNOTSUPP;
        }
 
-       nfp_prog->stack_depth = prog->aux->stack_depth;
+       nfp_prog->stack_depth = round_up(prog->aux->stack_depth, 4);
        nfp_prog->start_off = nn_readw(nn, NFP_NET_CFG_BPF_START);
        nfp_prog->tgt_done = nn_readw(nn, NFP_NET_CFG_BPF_DONE);