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

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

> > 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.

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