Re: [Xen-devel] pre Sandy bridge IOMMU support (gm45)

["Tian, Kevin" <kevin.tian@xxxxxxxxx>]

> From: Jan Beulich
> Sent: Tuesday, January 26, 2016 8:28 PM
> 
> >>> On 26.01.16 at 12:57, <thierry.laurion@xxxxxxxxx> wrote:
> > Only dom0 talks directly to the i915 driver, other appvm being pv, which is
> > why I put in question the complete deactivation of IGD by iommu=no-igfx.
> >
> > Is there anything I can provide to troubleshoot?
> 
> Hard to tell. The VT-d maintainers may be able to give you better
> guidance.
> 
> Jan
> 

I'm a bit confused what's being exactly asked here. Did you mean
that IOMMU is not actually disabled when you set iommu=no-gfx?

Thanks
Kevin

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