diff options
| author | Jiong Wang | 2017-12-01 06:32:50 +0100 |
|---|---|---|
| committer | Daniel Borkmann | 2017-12-01 20:59:19 +0100 |
| commit | 5b674140addc3c863efa227946ad7328f016a7a3 (patch) | |
| tree | 5dbc16895a3d7323e13004d6537889e222e8b935 /drivers/net/ethernet/netronome/nfp/bpf/verifier.c | |
| parent | nfp: bpf: support backward jump (diff) | |
| download | kernel-qcow2-linux-5b674140addc3c863efa227946ad7328f016a7a3.tar.gz kernel-qcow2-linux-5b674140addc3c863efa227946ad7328f016a7a3.tar.xz kernel-qcow2-linux-5b674140addc3c863efa227946ad7328f016a7a3.zip | |
nfp: bpf: record jump destination to simplify jump fixup
eBPF insns are internally organized as dual-list inside NFP offload JIT.
Random access to an insn needs to be done by either forward or backward
traversal along the list.
One place we need to do such traversal is at nfp_fixup_branches where one
traversal is needed for each jump insn to find the destination. Such
traversals could be avoided if jump destinations are collected through a
single travesal in a pre-scan pass, and such information could also be
useful in other places where jump destination info are needed.
This patch adds such jump destination collection in nfp_prog_prepare.
Suggested-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Jiong Wang <jiong.wang@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'drivers/net/ethernet/netronome/nfp/bpf/verifier.c')
| -rw-r--r-- | drivers/net/ethernet/netronome/nfp/bpf/verifier.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/net/ethernet/netronome/nfp/bpf/verifier.c b/drivers/net/ethernet/netronome/nfp/bpf/verifier.c index 8d43491ddd6b..cca67730b91f 100644 --- a/drivers/net/ethernet/netronome/nfp/bpf/verifier.c +++ b/drivers/net/ethernet/netronome/nfp/bpf/verifier.c @@ -1,5 +1,5 @@ /* - * Copyright (C) 2016 Netronome Systems, Inc. + * Copyright (C) 2016-2017 Netronome Systems, Inc. * * This software is dual licensed under the GNU General License Version 2, * June 1991 as shown in the file COPYING in the top-level directory of this @@ -40,7 +40,7 @@ #include "main.h" -static struct nfp_insn_meta * +struct nfp_insn_meta * nfp_bpf_goto_meta(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, unsigned int insn_idx, unsigned int n_insns) { |