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Re: [Xen-devel] Re: machine check report on HVM startup

To: xen-devel@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-devel] Re: machine check report on HVM startup
From: Christoph Egger <Christoph.Egger@xxxxxxx>
Date: Wed, 13 Aug 2008 15:17:09 +0200
Cc: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
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On Wednesday 13 August 2008 14:48:04 Keir Fraser wrote:
> On 13/8/08 13:40, "Christoph Egger" <Christoph.Egger@xxxxxxx> wrote:
> >>>> This looks to me, there's a non-public event channel using the same
> >>>> number as VIRQ_MCA which fires when  launching memtest as HVM guest.
> >>>
> >>> I don't think this is the case. Sounds easy to repro this issue though.
> >>> I'll give it a go.
> >>
> >> I can boot a memtest-3.4 ISO in an HVM guest on PAE hypervisor just
> >> fine.
> >
> > Does your Dom0 kernel registrate the machine check event handler ?
> > If not, then it things go fine. If yes, then you should see the flood of
> > VIRQ_MCA events in the Dom0.
> How do I make it do that?

Assuming you use Linux as Dom0, apply the attached patch to your local tree.
With it, you should see a flood of "xen_mca: HW reported correctable error(s)"
Dom0 kernel messages.

Note, the patch is not intended to go upstream. There will be something better
in the future.


AMD Saxony, Dresden, Germany
Operating System Research Center

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Attachment: linux_xenmca.diff
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