diff options
| author | Ilya Leoshkevich <iii@linux.ibm.com> | 2026-02-17 17:05:08 +0100 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2026-03-03 08:35:07 -0800 |
| commit | 6fe54677bcc2e7a42f5fcaa3c66600232ba54d44 (patch) | |
| tree | ba956500a3e669fa3fd6e355cbccdb64f28d221d /tools | |
| parent | 309d8808eef93d29b65ae69241a4475b2c8bd6fe (diff) | |
s390: Introduce bpf_get_lowcore() kfunc
Implementing BPF version of preempt_count() requires accessing lowcore
from BPF. Since lowcore can be relocated, open-coding
(struct lowcore *)0 does not work, so add a kfunc.
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Link: https://lore.kernel.org/r/20260217160813.100855-2-iii@linux.ibm.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/testing/selftests/bpf/bpf_experimental.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/bpf_experimental.h b/tools/testing/selftests/bpf/bpf_experimental.h index 9df77e59d4f5..4453ad27b2ef 100644 --- a/tools/testing/selftests/bpf/bpf_experimental.h +++ b/tools/testing/selftests/bpf/bpf_experimental.h @@ -627,6 +627,10 @@ struct task_struct___preempt_rt { int softirq_disable_cnt; } __attribute__((preserve_access_index)); +#ifdef bpf_target_s390 +extern struct lowcore *bpf_get_lowcore(void) __weak __ksym; +#endif + static inline int get_preempt_count(void) { #if defined(bpf_target_x86) |