A toggle indicating if the syscalls kexec_load and kexec_file_load have been disabled. This value defaults to 0 (false: kexec_*load enabled), but can be set to 1 (true: kexec_*load disabled). Once true, kexec can no longer be used, and the toggle cannot be set back to false. This allows a kexec image to be loaded before disabling the syscall, allowing a system to set up (and later use) an image without it being altered. Generally used together with the modules_disabled sysctl.