[Xen-devel] Re: [pvops xen/next ][iommu] attenpt to passthrough PCI-e usb controllor to PV domU: (XEN) traps.c:2309:d1 Domain attempted WRMSR 000000000000008b from 00000a07:00000000 to 00000000:00000000.

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

On Mon, Mar 22, 2010 at 11:15:24AM +0100, Sander Eikelenboom wrote:
> Hello Weidong/Konrad,
> 
> 1) With iommu=0, the DMAR fault is gone (of course), but
>         > (XEN) traps.c:2309:d1 Domain attempted WRMSR 000000000000008b from 
> 00000a07:00000000 to 00000000:00000000.
>         Stays in xm-dmesg, the pv guests is booted, and lspci shows the pci 
> device. But the device doesn't function properly.

How does it not function properly? Was this related to the IOMMU error ?
Did you point it out to me previously and I missed it? If so, can you
resend it to me please.

If the problem is with the message about needing 'swiotlb=force' to be
passed, 'iommu=soft swiotlb=force' should take care of that. 


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