PV Guest and PCI Passthrough, no more than 3.5GB Ram?

PV Guest and PCI Passthrough, no more than 3.5GB Ram?

[Robert Dunkley]

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Hi everyone,

 

 

I can't seem to get PCI pass through to map devices outside of the 4GB
memory range. I am booting Dom0 with iommu=pv and Domu with iommu=soft,
is there some sort of setting change to make this work?

 

 

Thanks,

 

 

Rob

 

[    0.158545] pci 0000:00:01.4: reg 10 64bit mmio:
[0xfbd18000-0xfbd1bfff]

[    0.158705] pci 0000:00:01.4: reg 1c 64bit mmio:
[0xfbd38000-0xfbd3bfff]

[    0.159102] pcifront pci-0: New device on 0000:00:01.04 found.

[    0.161052] pcifront pci-0: claiming resource 0000:00:01.0/0

[    0.161058] pci 0000:00:01.0: BAR 0: address space collision on of
device [0xfbd10000-0xfbd13fff]

[    0.161063] pcifront pci-0: Could not claim resource 0000:00:01.0/0!
Device offline. Try giving less than 4GB to domain.

[    0.161069] pcifront pci-0: claiming resource 0000:00:01.0/3

[    0.161074] pci 0000:00:01.0: BAR 3: address space collision on of
device [0xfbd30000-0xfbd33fff]

[    0.161079] pcifront pci-0: Could not claim resource 0000:00:01.0/3!
Device offline. Try giving less than 4GB to domain.

[    0.161085] pcifront pci-0: claiming resource 0000:00:00.4/0

[    0.161089] pci 0000:00:00.4: BAR 0: address space collision on of
device [0xfbd08000-0xfbd0bfff]

[    0.161095] pcifront pci-0: Could not claim resource 0000:00:00.4/0!
Device offline. Try giving less than 4GB to domain.

[    0.161101] pcifront pci-0: claiming resource 0000:00:00.4/3

[    0.161105] pci 0000:00:00.4: BAR 3: address space collision on of
device [0xfbd28000-0xfbd2bfff]

[    0.161110] pcifront pci-0: Could not claim resource 0000:00:00.4/3!
Device offline. Try giving less than 4GB to domain.

[    0.161116] pcifront pci-0: claiming resource 0000:00:00.6/0

[    0.161120] pci 0000:00:00.6: BAR 0: address space collision on of
device [0xfbd0c000-0xfbd0ffff]

[    0.161126] pcifront pci-0: Could not claim resource 0000:00:00.6/0!
Device offline. Try giving less than 4GB to domain.

[    0.161132] pcifront pci-0: claiming resource 0000:00:00.6/3

[    0.161136] pci 0000:00:00.6: BAR 3: address space collision on of
device [0xfbd2c000-0xfbd2ffff]

[    0.161141] pcifront pci-0: Could not claim resource 0000:00:00.6/3!
Device offline. Try giving less than 4GB to domain.

[    0.161147] pcifront pci-0: claiming resource 0000:00:01.2/0

[    0.161151] pci 0000:00:01.2: BAR 0: address space collision on of
device [0xfbd14000-0xfbd17fff]

[    0.161157] pcifront pci-0: Could not claim resource 0000:00:01.2/0!
Device offline. Try giving less than 4GB to domain.

[    0.161163] pcifront pci-0: claiming resource 0000:00:01.2/3

[    0.161167] pci 0000:00:01.2: BAR 3: address space collision on of
device [0xfbd34000-0xfbd37fff]

[    0.161172] pcifront pci-0: Could not claim resource 0000:00:01.2/3!
Device offline. Try giving less than 4GB to domain.

[    0.161178] pcifront pci-0: claiming resource 0000:00:01.4/0

[    0.161182] pci 0000:00:01.4: BAR 0: address space collision on of
device [0xfbd18000-0xfbd1bfff]

[    0.161188] pcifront pci-0: Could not claim resource 0000:00:01.4/0!
Device offline. Try giving less than 4GB to domain.

[    0.161194] pcifront pci-0: claiming resource 0000:00:01.4/3

[    0.161198] pci 0000:00:01.4: BAR 3: address space collision on of
device [0xfbd38000-0xfbd3bfff]

[    0.161204] pcifront pci-0: Could not claim resource 0000:00:01.4/3!
Device offline. Try giving less than 4GB to domain.

[    0.256101] XENBUS: Device with no driver: device/vbd/51714

 


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Re: PV Guest and PCI Passthrough, no more than 3.5GB Ram?

[Konrad Rzeszutek Wilk]

On Wed, Mar 30, 2011 at 08:03:26AM +0100, Robert Dunkley wrote:
> Hi everyone,
> 
>  
> 
>  
> 
> I can't seem to get PCI pass through to map devices outside of the 4GB
> memory range. I am booting Dom0 with iommu=pv and Domu with iommu=soft,
> is there some sort of setting change to make this work?

Not yet. I've a patch for this, but need to redo it nicely.
Let me start working on it today if nothing else preempts me.