Re: [Xen-devel] [BUG] After upgrade to Xen 4.12.0 iommu=no-igfx

[Roman Shaposhnik <roman@xxxxxxxxxx>]

On Tue, Jul 23, 2019 at 10:50 AM Andrew Cooper
<andrew.cooper3@xxxxxxxxxx> wrote:
>
> On 23/07/2019 18:48, Roman Shaposhnik wrote:
> > On Tue, Jul 23, 2019 at 10:35 AM Andrew Cooper
> > <andrew.cooper3@xxxxxxxxxx> wrote:
> >> On 23/07/2019 18:32, Roman Shaposhnik wrote:
> >>> Hi Roger!
> >>>
> >>> I applied your patch, removed no-igfx and I still see the original
> >>> problem. Please let me know what other logs/debugs would you need at
> >>> this point.
> >> Please can you collect a full boot log with iommu=debug
> > How long of an output should I expect when iommu=debug is enabled?
> > I've just enabled it and I'm looking at what appears to be an endless
> > scroll of debug info.
> >
> > This is all I see for the good 5 minutes at this point. Culminating with:
> > (XEN)   (XEN) APIC error on CPU0: 40(00)
> >
> > and a failure to boot.
> >
> > Note that this is still without no-igfx
> >
> > I'm attaching the tail end of this log.
>
> Sadly, what is useful is the head of the log, before it starts
> complaining loudly about every DMA fault.

No worries. Take a look at the head of the log attached.

Btw, I'm kind of curious why iommu=debug would actually make it crash

Thanks,
Roman.

Attachment: xen-log2.txt
Description: Text document

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