Re: [PATCH] x86/microcode/intel: print previous microcode revision during early update

From: Borislav Petkov
Date: Fri Jan 26 2018 - 06:58:16 EST


On Fri, Jan 26, 2018 at 12:45:35PM +0100, Petr Oros wrote:
> During time of facing the Spectre vulnerability and the requirement of handling
> different microcode updates, it has shown, that it would be useful to have
> additional information which microcode version was in BIOS, if the early-update
> routine will apply an update.

Dmesg tells you if the update was applied or not.

And if you really wanna know the old microcode revision, you can boot
with "dis_ucode_ldr" and do "grep microcode /proc/cpuinfo".

--
Regards/Gruss,
Boris.

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