UEFI (Unified Extensible Firmware Interface) is an interface between operating systems and the hardware
platform’s firmware. UEFI provides a standard environment for running UEFI apps. UEFI apps include:
- the UEFI shell.
- UKIs – OS kernels that are Unified Kernel Images. An UKI can be booted from UEFI without any boot manager.
- boot managers for booting operating systems.
UEFI defines variables through which an operating system can interact with the firmware.
| created on | November 23, 2025 |
enable access to UEFI on Linux enable EFI Runtime Services support in the kernel The kernel configuration parameter CONFIG_EFI=y enables EFI Runtime Services in the kernel.
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