default or selected kernelversion does not have config value CONFIG_DEBUG_HOTPLUG_CPU0.
Result is shown for kernelversion 6.9.9
Debug CPU0 hotplug
configname: CONFIG_DEBUG_HOTPLUG_CPU0
Linux Kernel Configuration
└─>Processor type and features
└─>Debug CPU0 hotplug
In linux kernel since version 3.1 (release Date: 2011-10-24)
Enabling this option offlines CPU0 (if CPU0 can be offlined) as
soon as possible and boots up userspace with CPU0 offlined. User
can online CPU0 back after boot time.
To debug CPU0 hotplug, you need to enable CPU0 offline/online
feature by either turning on CONFIG_BOOTPARAM_HOTPLUG_CPU0 during
compilation or giving cpu0_hotplug kernel parameter at boot.
If unsure, say N.
soon as possible and boots up userspace with CPU0 offlined. User
can online CPU0 back after boot time.
To debug CPU0 hotplug, you need to enable CPU0 offline/online
feature by either turning on CONFIG_BOOTPARAM_HOTPLUG_CPU0 during
compilation or giving cpu0_hotplug kernel parameter at boot.
If unsure, say N.