selftests/bpf: Add tests to verify global percpu data

If the arch, like s390x, does not support percpu insn, these cases won't
test global percpu data by checking FEAT_PERCPU_DATA support.

The following APIs have been tested for global percpu data:

1. bpf_map__set_initial_value()
2. bpf_map__initial_value()
3. bpf_map__set_value_size()
4. generated percpu struct pointer pointing to internal map's mmaped data
5. bpf_map__lookup_elem() for global percpu data map
6. bpf_map_lookup_elem_flags() for global percpu data map

At the same time, the case is also tested with 'bpftool gen skeleton -L'.

Assisted-by: Codex:gpt-5.5-xhigh
Signed-off-by: Leon Hwang <leon.hwang@linux.dev>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20260813152324.97937-8-leon.hwang@linux.dev

0 files changed, 0 insertions, 0 deletions