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Updating CPU microcode possible?

From: Nikos Chantziaras
Subject: Updating CPU microcode possible?
Date: Sat, 31 May 2014 12:18:06 +0300
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(I've tried posting this before I subscribed, since says that "subscription to the list is not required to post a question." But that failed. So I'm trying again, after having subscribed...)


Is it possible to update the CPU's microcode (an Intel CPU, in this case) with Grub? Meaning before the operating system starts.

I'm using Grub 2.02 beta 2 to boot three operating systems on my machine (Gentoo, FreeBSD and Windows 8.1.) It would be nice if I could make Grub do a microcode update before booting any of those operating systems. Right now, I am only able to a microcode update in Linux, after the kernel is booted.

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