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Re: [Xen-devel] [v5][PATCH 0/5] xen: add Intel IGD passthrough support
- To: "Michael S. Tsirkin" <mst@xxxxxxxxxx>
- From: Paolo Bonzini <pbonzini@xxxxxxxxxx>
- Date: Thu, 26 Jun 2014 15:30:11 +0200
- Cc: peter.maydell@xxxxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxx, stefano.stabellini@xxxxxxxxxxxxx, allen.m.kay@xxxxxxxxx, qemu-devel@xxxxxxxxxx, Kelly.Zytaruk@xxxxxxx, yang.z.zhang@xxxxxxxxx, anthony@xxxxxxxxxxxxx, anthony.perard@xxxxxxxxxx, "Chen, Tiejun" <tiejun.chen@xxxxxxxxx>
- Delivery-date: Thu, 26 Jun 2014 13:30:47 +0000
- List-id: Xen developer discussion <xen-devel.lists.xen.org>
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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