diff options
| author | Jakub Kicinski | 2018-03-29 02:48:37 +0200 |
|---|---|---|
| committer | Alexei Starovoitov | 2018-03-29 04:36:14 +0200 |
| commit | df4a37d8b53f9fb9af722b056da5edbd9a531768 (patch) | |
| tree | 6935e2eadf67ddc371139569dce030b7dabe4cd1 /drivers/net/ethernet/netronome/nfp/bpf/verifier.c | |
| parent | nfp: bpf: add support for atomic add of unknown values (diff) | |
| download | kernel-qcow2-linux-df4a37d8b53f9fb9af722b056da5edbd9a531768.tar.gz kernel-qcow2-linux-df4a37d8b53f9fb9af722b056da5edbd9a531768.tar.xz kernel-qcow2-linux-df4a37d8b53f9fb9af722b056da5edbd9a531768.zip | |
nfp: bpf: add support for bpf_get_prandom_u32()
NFP has a prng register, which we can read to obtain a u32 worth
of pseudo random data. Generate code for it.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Reviewed-by: Jiong Wang <jiong.wang@netronome.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'drivers/net/ethernet/netronome/nfp/bpf/verifier.c')
| -rw-r--r-- | drivers/net/ethernet/netronome/nfp/bpf/verifier.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/net/ethernet/netronome/nfp/bpf/verifier.c b/drivers/net/ethernet/netronome/nfp/bpf/verifier.c index 486ffd1d5913..06ad53ce4ad9 100644 --- a/drivers/net/ethernet/netronome/nfp/bpf/verifier.c +++ b/drivers/net/ethernet/netronome/nfp/bpf/verifier.c @@ -209,6 +209,13 @@ nfp_bpf_check_call(struct nfp_prog *nfp_prog, struct bpf_verifier_env *env, meta->func_id ? &meta->arg2 : NULL)) return -EOPNOTSUPP; break; + + case BPF_FUNC_get_prandom_u32: + if (bpf->pseudo_random) + break; + pr_vlog(env, "bpf_get_prandom_u32(): FW doesn't support random number generation\n"); + return -EOPNOTSUPP; + default: pr_vlog(env, "unsupported function id: %d\n", func_id); return -EOPNOTSUPP; |