[RFC PATCH net-next 05/13] bpf: offload: allow PERCPU_ARRAY maps for offloaded programs
From: Taehee Yoo <ap420073@gmail.com>
Date: 2026-07-19 18:00:39
Also in:
amd-gfx, bpf, dri-devel, linux-hardening, linux-kselftest, linux-media, linux-rdma, lkml, llvm
Subsystem:
bpf [general] (safe dynamic programs and tools), the rest · Maintainers:
Alexei Starovoitov, Daniel Borkmann, Andrii Nakryiko, Eduard Zingerman, Kumar Kartikeya Dwivedi, Linus Torvalds
The knod BPF offload keeps hot per-CPU statistics in a PERCPU_ARRAY map that is mirrored into accelerator memory and aggregated back on the host. Permit this map type on the offload path. Signed-off-by: Taehee Yoo <ap420073@gmail.com> (cherry picked from commit c447c9012940d48c1ec20a8ebac8d779e7d5a6fa) --- kernel/bpf/offload.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/kernel/bpf/offload.c b/kernel/bpf/offload.c
index 0d6f5569588c..36e747a12cbe 100644
--- a/kernel/bpf/offload.c
+++ b/kernel/bpf/offload.c@@ -510,7 +510,8 @@ struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr) if (!capable(CAP_SYS_ADMIN)) return ERR_PTR(-EPERM); if (attr->map_type != BPF_MAP_TYPE_ARRAY && - attr->map_type != BPF_MAP_TYPE_HASH) + attr->map_type != BPF_MAP_TYPE_HASH && + attr->map_type != BPF_MAP_TYPE_PERCPU_ARRAY) return ERR_PTR(-EINVAL); offmap = bpf_map_area_alloc(sizeof(*offmap), NUMA_NO_NODE);
--
2.43.0