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(parent: 309d880) | patch
s390: Introduce bpf_get_lowcore() kfunc
authorIlya Leoshkevich <iii@linux.ibm.com>
Tue, 17 Feb 2026 16:05:08 +0000 (17:05 +0100)
committerAlexei Starovoitov <ast@kernel.org>
Tue, 3 Mar 2026 16:35:07 +0000 (08:35 -0800)
commit6fe54677bcc2e7a42f5fcaa3c66600232ba54d44
treeba956500a3e669fa3fd6e355cbccdb64f28d221dtree | snapshot
parent309d8808eef93d29b65ae69241a4475b2c8bd6fecommit | 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>
arch/s390/kernel/Makefile diff | blob | blame | history
arch/s390/kernel/bpf.c [new file with mode: 0644] blob
kernel/bpf/helpers.c diff | blob | blame | history
tools/testing/selftests/bpf/bpf_experimental.h diff | blob | blame | history
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