EFI capsule loader

modulename: capsule-loader.ko

configname: CONFIG_EFI_CAPSULE_LOADER

Linux Kernel Configuration
└─>Firmware Drivers
└─>EFI (Extensible Firmware Interface) Support
└─>EFI capsule loader
In linux kernel since version 3.10 (release Date: 2013-06-30)  
This option exposes a loader interface "/dev/efi_capsule_loader" for
users to load EFI capsules. This driver requires working runtime
capsule support in the firmware, which many OEMs do not provide.

Most users should say N.

source code: