Linux 4.2 To Support The EFI System Resource Table
Written by Michael Larabel in Linux Kernel on 31 May 2015 at 12:42 PM EDT. 4 Comments
LINUX KERNEL --
The Linux 4.2 kernel cycle that will soon officially commence will be adding support for the EFI System Resource Table (ESRT) in order to allow the updating of UEFI/BIOS on modern systems from the Linux desktop.

The EFI subsystem update for Linux 4.2 will introduce support for the EFI System Resource Table, which was added to the new UEFI 2.5 specification. The ESRT support is needed for the UEFI 2.5 feature of allowing UEFI updates via standardized mechanisms.

The changes in UEFI 2.5 will make UEFI/BIOS updating under Linux much easier and Red Hat has already been working on the new fwupdate tool for performing such firmware updates on systems supporting UEFI 2.5+. They've been working a lot to ensure smooth and easy UEFI updates under Linux. With Linux 4.2, the necessary kernel change will be in place.

The ESRT is responsible for providing a list of system components that accept firmware upgrades via the UEFI Capsule Update specification. Microsoft has also been looking forward to UEFI 2.5 for sending down these UEFI Capsule Updates via Windows Updates.

The EFI System Resource Table on Linux 4.2+ will be exposed to user-space via sysfs. The ESRT support was lined up today for sending in for the next kernel merge window that will be opening up in the weeks ahead.

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Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter or contacted via MichaelLarabel.com.

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