Improved AMD CPU Microcode Handling On Deck For Linux 4.21
Written by Michael Larabel in AMD on 24 December 2018 at 12:06 PM EST. Add A Comment
AMD --
With CPU microcode updates having become increasingly important over the past year in light of the Spectre vulnerabilities and other security updates, the Linux 4.21 kernel is bringing several improvements to the AMD CPU microcode update handling.

The AMD CPU microcode update handling now does more verification work to ensure it's not corrupted, the microcode loading code has been cleaned up and seen more unification of the code paths, and other improvements.

Borislav Petkov commented in the pull request, "The result is a set of verification routines which validate the microcode blobs before loading it on the CPU. In addition, the code is a lot more streamlined and unified. In the process, some of the aspects of patch handling and loading were simplified."
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Michael Larabel is the principal author of 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 automated benchmarking software. He can be followed via Twitter or contacted via

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