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Re: [Qemu-devel] kvm PCI assignment & VFIO ramblings
From: |
Roedel, Joerg |
Subject: |
Re: [Qemu-devel] kvm PCI assignment & VFIO ramblings |
Date: |
Mon, 22 Aug 2011 14:36:51 +0200 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
On Mon, Aug 22, 2011 at 06:51:35AM -0400, Avi Kivity wrote:
> On 08/22/2011 01:46 PM, Joerg Roedel wrote:
> > That does not work. The bridge in question may not even be visible as a
> > PCI device, so you can't link to it. This is the case on a few PCIe
> > cards which only have a PCIx chip and a PCIe-2-PCIx bridge to implement
> > the PCIe interface (yes, I have seen those cards).
>
> How does the kernel detect that devices behind the invisible bridge must
> be assigned as a unit?
On the AMD IOMMU side this information is stored in the IVRS ACPI table.
Not sure about the VT-d side, though.
Joerg
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- Re: [Qemu-devel] kvm PCI assignment & VFIO ramblings, (continued)
- Re: [Qemu-devel] kvm PCI assignment & VFIO ramblings, David Gibson, 2011/08/22
- Re: [Qemu-devel] kvm PCI assignment & VFIO ramblings, Alex Williamson, 2011/08/23
- Re: [Qemu-devel] kvm PCI assignment & VFIO ramblings, Benjamin Herrenschmidt, 2011/08/23
- Re: [Qemu-devel] kvm PCI assignment & VFIO ramblings, Alexander Graf, 2011/08/23
- Re: [Qemu-devel] kvm PCI assignment & VFIO ramblings, Avi Kivity, 2011/08/22
- Re: [Qemu-devel] kvm PCI assignment & VFIO ramblings, Joerg Roedel, 2011/08/22
- Re: [Qemu-devel] kvm PCI assignment & VFIO ramblings, Avi Kivity, 2011/08/22
- Re: [Qemu-devel] kvm PCI assignment & VFIO ramblings,
Roedel, Joerg <=
- Re: [Qemu-devel] kvm PCI assignment & VFIO ramblings, Avi Kivity, 2011/08/22
- Re: [Qemu-devel] kvm PCI assignment & VFIO ramblings, Roedel, Joerg, 2011/08/22
- Re: [Qemu-devel] kvm PCI assignment & VFIO ramblings, Avi Kivity, 2011/08/22
- Re: [Qemu-devel] kvm PCI assignment & VFIO ramblings, Roedel, Joerg, 2011/08/22
- Re: [Qemu-devel] kvm PCI assignment & VFIO ramblings, Avi Kivity, 2011/08/22
- Re: [Qemu-devel] kvm PCI assignment & VFIO ramblings, Roedel, Joerg, 2011/08/22
- Re: [Qemu-devel] kvm PCI assignment & VFIO ramblings, Benjamin Herrenschmidt, 2011/08/22
- Re: [Qemu-devel] kvm PCI assignment & VFIO ramblings, Joerg Roedel, 2011/08/22
- Re: [Qemu-devel] kvm PCI assignment & VFIO ramblings, Alex Williamson, 2011/08/22
- Re: [Qemu-devel] kvm PCI assignment & VFIO ramblings, Roedel, Joerg, 2011/08/23