[Xen-users] Does USB passthru require VT-d or IOMMU?

[Henning Holtschneider <henning@xxxxxxxx>]

Hello everybody,

I'm running Xen 3.3.0 on Ubuntu 8.10 server. I'm trying to pass a USB  
device to a Windows 2003 DomU, but the qemu logfile just tells me  
"Warning: could not add USB device host:0123:4567". Before I start to  
debug the problem more thoroughly, I wonder: do I need a mainboard  
chipset that supports Intel's VT-d technology or AMD's IOMMU to pass  
individual USB devices from the Dom0 to a DomU?
Best regards,
Henning Holtschneider
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