Re: AMD zen microcode updates breaks boot

From: Borislav Petkov
Date: Wed Oct 09 2024 - 05:13:14 EST


On Mon, Sep 30, 2024 at 10:25:21AM -0600, Jens Axboe wrote:
> Hmm, seems like a pretty standard cpu and updated microcode fw, no? But
> if it's just me, we can just defer until it gets fixed, at least for
> some more rcs. I just pruned the microcode for now to work around it, as
> it's pretty annoying to forget about doing the reverts and then booting
> a broken kernel. The box takes minutes to post+boot.

With the microcode blob removed so that no loading happens, what microcode
does this box have?

Still 0x0aa00215?

I.e., what does:

$ grep microcode /proc/cpuinfo | sort | uniq -c

say?

Thx.

--
Regards/Gruss,
Boris.

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