Yabits: A New UEFI Coreboot Payload Alternative To TianoCore & Closed-Source Blobs

Written by Michael Larabel in Coreboot on 4 October 2018 at 08:49 PM EDT. 26 Comments
Yabits was announced last month at the OSFC 2018 conference in Erlangen, Germany. Yabits is a lighter-weight alternative to the open-source TianoCore UEFI implementation and other commonly used proprietary UEFI implementations by motherboard vendors.

Yabits is "Yet another UEFI coreboot payload" and aims to deliver the same UEFI x86_64 booting capabilities as TianoCore but with a much smaller code-base for environments like embedded systems and the cloud.

This Coreboot payload is much simpler than TianoCore and is based on the UEFI code of the Unix-like Minoca OS. Minoca OS is the lightweight OS intended for embedded systems while Yabits ports this UEFI code for use as a Coreboot payload. So far though it's quite basic with for instance only supporting IDE and AHCI device drivers.

Yabits has been found to be about twice as fast as the default UEFI implementation on a Lenovo ThinkPad X230, boot 9x faster with QEMU over OVMF, and binaries are about 10x smaller than TianoCore.

Future plans for Yabits are ARM support, Secure Boot capabilities, Graphical Output Protocol handling, and the ability to boot Windows.

Those wishing to learn more can find the presentation video embedded below as well as checking out the PDF slide deck.

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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 20,000 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, LinkedIn, or contacted via MichaelLarabel.com.

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