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From: Quentin Monnet <quentin.monnet@netronome.com>
To: daniel@iogearbox.net, alexei.starovoitov@gmail.com,
	netdev@vger.kernel.org
Cc: oss-drivers@netronome.com, jakub.kicinski@netronome.com
Subject: [PATCH bpf-next v2 03/14] nfp: bpf: round up the size of the stack
Date: Wed, 10 Jan 2018 12:25:56 +0000	[thread overview]
Message-ID: <1515587167-1959-4-git-send-email-quentin.monnet@netronome.com> (raw)
In-Reply-To: <1515587167-1959-1-git-send-email-quentin.monnet@netronome.com>

From: Jakub Kicinski <jakub.kicinski@netronome.com>

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>
---
 drivers/net/ethernet/netronome/nfp/bpf/offload.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/netronome/nfp/bpf/offload.c b/drivers/net/ethernet/netronome/nfp/bpf/offload.c
index fa2905e67b07..8dbf13450bab 100644
--- 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);
 
-- 
2.7.4

  parent reply	other threads:[~2018-01-10 12:27 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-01-10 12:25 [PATCH bpf-next v2 00/14] nfp: bpf: relocations, verifier log, signed jumps and other updates Quentin Monnet
2018-01-10 12:25 ` [PATCH bpf-next v2 01/14] nfp: don't try to register XDP rxq structures on control queues Quentin Monnet
2018-01-10 12:25 ` [PATCH bpf-next v2 02/14] nfp: fix incumbent kdoc warnings Quentin Monnet
2018-01-10 12:25 ` Quentin Monnet [this message]
2018-01-10 12:25 ` [PATCH bpf-next v2 04/14] nfp: bpf: don't allow changing MTU above BPF offload limit when active Quentin Monnet
2018-01-10 12:25 ` [PATCH bpf-next v2 05/14] nfp: bpf: allow disabling TC offloads when XDP active Quentin Monnet
2018-01-10 12:25 ` [PATCH bpf-next v2 06/14] nfp: bpf: move jump resolution to jit.c Quentin Monnet
2018-01-10 12:26 ` [PATCH bpf-next v2 07/14] nfp: bpf: add helpers for modifying branch addresses Quentin Monnet
2018-01-10 12:26 ` [PATCH bpf-next v2 08/14] nfp: bpf: relocate jump targets just before the load Quentin Monnet
2018-01-10 12:26 ` [PATCH bpf-next v2 09/14] nfp: bpf: don't depend on high order allocations for program image Quentin Monnet
2018-01-10 12:26 ` [PATCH bpf-next v2 10/14] nfp: bpf: use a large constant in unresolved branches Quentin Monnet
2018-01-10 12:26 ` [PATCH bpf-next v2 11/14] nfp: hand over to BPF offload app at coarser granularity Quentin Monnet
2018-01-10 12:26 ` [PATCH bpf-next v2 12/14] nfp: bpf: add signed jump insns Quentin Monnet
2018-01-10 12:26 ` [PATCH bpf-next v2 13/14] bpf: export function to write into verifier log buffer Quentin Monnet
2018-01-10 12:26 ` [PATCH bpf-next v2 14/14] nfp: bpf: reuse verifier log for debug messages Quentin Monnet
2018-01-10 14:05 ` [PATCH bpf-next v2 00/14] nfp: bpf: relocations, verifier log, signed jumps and other updates Daniel Borkmann

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