What: /sys/kernel/reboot
Date: November 2020
KernelVersion: 5.11
Contact: Matteo Croce <teknoraver@meta.com>
Description: Interface to set the kernel reboot behavior, similarly to
what can be done via the reboot= cmdline option.
(see Documentation/admin-guide/kernel-parameters.txt)
What: /sys/kernel/reboot/mode
Date: November 2020
KernelVersion: 5.11
Contact: Matteo Croce <teknoraver@meta.com>
Description: Reboot mode. Valid values are: cold warm hard soft gpio
What: /sys/kernel/reboot/type
Date: November 2020
KernelVersion: 5.11
Contact: Matteo Croce <teknoraver@meta.com>
Description: Reboot type. Valid values are: bios acpi kbd triple efi pci
What: /sys/kernel/reboot/cpu
Date: November 2020
KernelVersion: 5.11
Contact: Matteo Croce <teknoraver@meta.com>
Description: CPU number to use to reboot.
What: /sys/kernel/reboot/force
Date: November 2020
KernelVersion: 5.11
Contact: Matteo Croce <teknoraver@meta.com>
Description: Don
't wait for any other CPUs on reboot and
avoid anything that could hang.
What: /sys/kernel/reboot/hw_protection
Date: April 2025
KernelVersion: 6.15
Contact: Ahmad Fatoum <a.fatoum@pengutronix.de>
Description: Hardware protection action taken on critical events like
overtemperature
or imminent voltage loss.
Valid values are: reboot shutdown
