[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] ResettRe: [v5][PATCH 0/5] xen: add Intel IGD passthrough support
Il 03/07/2014 21:09, Jesse Barnes ha scritto: Practically speaking, we could probably assume specific CPU/PCH combos, as I don't think they're generally mixed across generations, though SNB and IVB did have compatible sockets, so there is the possibility of mixing CPT and PPT PCHs, but those are register identical as far as the graphics driver is concerned, so even that should be safe. I guess the driver could do that if it finds an unknown PCH device ID. But encoding it in the subsystem device ID could also work and it would be easy to do in the hypervisor. Beyond that, the other MCH data we need to look at is mirrored into the GPU's MMIO space on current gens. Heh, that's exactly the same as the paravirtualized solution we were suggesting. ;) Paolo On older gens, we do need to poke at the memory controller a bit to get some info (see intel_setup_mchbar()), but that's not true of newer stuff. Looks like we only short circuit that on VLV though; we could probably do it on SNB+. _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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