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Diffstat (limited to 'arch/x86/Kconfig')
| -rw-r--r-- | arch/x86/Kconfig | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 036e89ab470c..b6cfa5f62529 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -1727,6 +1727,21 @@ config BOOTPARAM_HOTPLUG_CPU0 You still can enable the CPU0 hotplug feature at boot by kernel parameter cpu0_hotplug. +config DEBUG_HOTPLUG_CPU0 + def_bool n + prompt "Debug CPU0 hotplug" + depends on HOTPLUG_CPU && EXPERIMENTAL + ---help--- + 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. + config COMPAT_VDSO def_bool y prompt "Compat VDSO support" |