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Re: [Xen-devel] [v5][PATCH 0/5] xen: add Intel IGD passthrough support



Il 26/06/2014 13:36, Michael S. Tsirkin ha scritto:
It should be this way in real hardware too
But it isn't.

That's why I mentioned that this hack should become architecturally specified (since it can work on real hardware too) with QEMU doing the emulation for current-generation devices.

> (not exactly _this_ hack, but at least no improper relationship among
> IGD/MCH/PCH).

Well that dependency between devices is common for embedded hardware,
and this is what we have here.

Sure, but then you should put MCH/PCH/IGD in the same IOMMU group, which basically means forgetting about IGD assignment.

Paolo

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