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| author | Tobias Huschle <huschle@linux.ibm.com> | 2023-08-16 09:28:20 +0200 |
|---|---|---|
| committer | Vasily Gorbik <gor@linux.ibm.com> | 2023-09-19 13:26:55 +0200 |
| commit | 496bb034f4ff4866452ced7fdfaa4a0736230bdf (patch) | |
| tree | 7f58003791f03b5bcaf6928e73c81f9056f8614b /arch/s390/kernel/setup.c | |
| parent | 4a1725281fc5b0009944b1c0e1d2c1dc311a09ec (diff) | |
s390/smp: disallow CPU hotplug of CPU 0
On s390, CPU 0 has special properties in comparison to other CPUs, as it
cannot be deconfigured for example. Therefore, allowing to hotplug CPU 0
introduces additional complexity when handling these properties.
Disallowing to hotplug CPU 0 allows to remove such complexities.
This follows x86 which also prevents offlining of CPU0 since commit
e59e74dc48a3 ("x86/topology: Remove CPU0 hotplug option").
[hca@linux.ibm.com: changed commit message]
Suggested-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Tobias Huschle <huschle@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Diffstat (limited to 'arch/s390/kernel/setup.c')
0 files changed, 0 insertions, 0 deletions