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Feature #9744

closed

invalidate cache before microcode update

Added by Robert Mustacchi almost 4 years ago. Updated almost 4 years ago.

Status:
Closed
Priority:
Normal
Category:
kernel
Start date:
2018-08-16
Due date:
% Done:

100%

Estimated time:
Difficulty:
Medium
Tags:
Gerrit CR:

Description

There have been some reports that certain microcode updates on a few parts require that the cache be flushed before performing the microcode update itself due to the pieces that the microcode is updating. Therefore we should always invalidate the cache immediately before performing the wrmsr for the microcode update. Intel has made patches available to Linux that do this and suggested we implement the same thing.

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