Date: 31/03/2022

UEFI Forum updated UEFI 2.9 Specs released

Unified Extensible Firmware Interface (UEFI) Forum released its updated Unified Extensible Firmware Interface (UEFI) 2.9 specification. The next iteration of firmware specification innovation defines a model for the interface between personal-computer operating systems and platform firmware.

“The UEFI Forum is focused on aiding the evolving technology and open source ecosystems,” said Mark Doran, UEFI Forum President. “The UEFI 2.9 specification illustrates our commitment to the industry with added support of newer hardware types like CXL and NVDIMMs, as well as increased support for Arm and RISC-V processors.”

UEFI 2.9 Specification Highlights

Support for discovering and describing CXL devices
Support for publishing DTB in UEFI Configuration Table
Clarification of Update Capsule runtime call on some architectures like Arm AArch64
Introduction of unaccepted memory type

The specification is available in PDF format and will soon be available in searchable HTML format.