What: /sys/kernel/reboot Date: November 2020 KernelVersion: 5.11 Contact: Matteo Croce 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 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 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 Description: CPU number to use to reboot. What: /sys/kernel/reboot/force Date: November 2020 KernelVersion: 5.11 Contact: Matteo Croce Description: Don't wait for any other CPUs on reboot and avoid anything that could hang.