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[Xen-devel] Re: [PATCH 0/3] x86/microcode: support for microcode update

To: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Subject: [Xen-devel] Re: [PATCH 0/3] x86/microcode: support for microcode update in Xen dom0
From: Borislav Petkov <bp@xxxxxxxxx>
Date: Thu, 13 Oct 2011 00:38:37 +0200
Cc: Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>, the arch/x86 maintainers <x86@xxxxxxxxxx>, Linux Kernel Mailing List <linux-kernel@xxxxxxxxxxxxxxx>, Xen Devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, Tigran Aivazian <tigran@xxxxxxxxxxxxxxxxxxxx>, "H. Peter Anvin" <hpa@xxxxxxxxx>, Ingo Molnar <mingo@xxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>
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On Wed, Oct 12, 2011 at 06:33:28PM -0400, Jeremy Fitzhardinge wrote:
> On 10/12/2011 03:29 PM, H. Peter Anvin wrote:
> > On 10/12/2011 03:27 PM, Jeremy Fitzhardinge wrote:
> >>
> >> The current scheme has worked pretty well so far; there doesn't seem to
> >> be a huge concern about it.  Have there been actual observed failures
> >> with the current mechanism, or is the drive to make it earlier driven by
> >> an aesthetic desire to make it "as it should be"?
> >>
> >
> > Yes, there has.  There is at least one case where we have to print an
> > error message saying "update your BIOS" because our current microcode
> > update is too late.
> 
> Is that K8 errata 93 or something else?

AFAIR, that was an Atom erratum fix.

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