Re: [Xen-devel] question about i915 driver in dom0

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

> From: Konrad Rzeszutek Wilk [mailto:konrad.wilk@xxxxxxxxxx]
> Sent: Monday, January 09, 2012 11:05 PM
> 
> > > But more interestingly - are you building your kernel from scratch? There
> >
> > yes
> >
> > > was some requirements in having CONFIG_IOMMU_DMAR in the kernels -
> > > otherwise
> > > the intel-gtt.c would use the 'virt_to_phys' code instead of the DMA API.
> >
> > Suppose you mean CONFIG_DMAR_TABLE? There's no
> CONFIG_IOMMU_DMAR
> > in the latest kernel. Yes, I didn't enable that option, and will have a try.
> 
> Yes, that is the option.
> 
> >
> > But a side question is, will enabling VT-d in dom0 conflict with Xen's own
> > VT-d operations?
> 
> No conflict. The Xen re-writes the DMAR table to be called XMAR so Linux's
> parser won't pick it up.

Hi, Konrad,

this information is really great, and now X can be started smoothly, and also
a simple glxgear runs well! :-) This options deserves an explicit mark in the
wiki page btw.

Thanks
Kevin

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