Re: [Xen-devel] Regression with Xen 4.4 when booting with AMD IOMMU on TA890FXE BIOSTAR

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

> >(XEN) AMD-Vi: per-device vector map logic is broken.  Using 
> >per-device-global maps instead until a fix is found.
> 
> Looks like IOAPIC definition is missing from IVRS. The one that's
> listed (0000:00:00.1 variety 0x1 handle 0x6) is usually unused IIRC.
> I'd expect an entry for the second one (that lives on the
> southbridge), such as
>     AMD-Vi: IVHD Special: 0000:00:14.0 variety 0x1 handle 0
> 
> And page faults that you are seeing may also be related to this
> since 0xa0 is 00:14.0.
> 
> BIOS update might help with this problem (looks like Biostar has a
> newer BIOS for this board) but I think this should be fixed so maybe
> you want to keep this BIOS until a fix is developed.

OK.
> 
> You could try booting with iommu=no-intremap to work around this in
> the meantime.

That did make it boot. Thanks!

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