On Mon, Jun 30, 2014 at 01:18:51PM +0200, Paolo Bonzini wrote:
> Il 30/06/2014 12:20, Chen, Tiejun ha scritto:
> >
> >I already post this to mainline to change as follows:
> >
> >- while ((pch = pci_get_class(PCI_CLASS_BRIDGE_ISA << 8, pch))) {
> >+ pch = pci_get_bus_and_slot(0, PCI_DEVFN(0x1f, 0));
> >+ if (pch) {
> >
> >Please refer to this,
> >
> >[RFC][PATCH] gpu:drm:i915:intel_detect_pch: back to check devfn instead
> >of check class type
> >
> >Linux Native guys would like to accept this. And actually Windows always
> >use devfn to detect this.
>
> Fair enough, but that means that, when using IGD, Q35 will have to move the
> ISA bridge off 1f.0.
>
> To me it seems fairly clear that as things stand IGD is not virtualizable
> without PV support. We're beating a dead horse.
>
> Paolo
It seems virtualizeable without PV. Virtualizing it just requires
emulating a chipset that's closer to what the driver expects,
which seems to be more effort than Tiejun is prepared to put in.
--
MST
