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[Xen-users] Xen 4 VGA Passthrough - Keyboard/Mouse?

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Subject: [Xen-users] Xen 4 VGA Passthrough - Keyboard/Mouse?
From: "Nick Couchman" <Nick.Couchman@xxxxxxxxx>
Date: Thu, 08 Apr 2010 11:49:01 -0600
Delivery-date: Thu, 08 Apr 2010 10:51:24 -0700
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I've just installed Xen 4 and am working to get VGA passthrough configured.  I 
seem to have that piece successfully configured, but, unfortunately, have no 
keyboard and mouse support in my new VM.  If I try USB pass-through, I get the 
following error message in the qemu-dm-<domain>.log file:

husb: open device 7.2
husb: config #1 need -1
husb: 1 interfaces claimed for configuration 1
husb: grabbed usb device 7.2
usb_linux_update_endp_table: Broken pipe
Warning: could not add USB device host:0488:00df

Yes, I have verified that usbfs is mounted on /proc/bus/usb - this is not the 
issue.  I decided to try forwarding through the entire USB controller using 
PCI.  The challenge here is that there are about 7 different PCI devices that 
make up the USB controller (integrated into the motherboard).  I added all of 
these devices to the pciback.hide option at boot time, then tried to forward 
them through to the HVM domU, but for some reason this does not work - the 
devices are never reported under "pci-list-assignable-devices" as assignable, 
and when I try to start the VM, I get errors about pciback not owning the PCI 
devices.

Can someone offer any advice as to the best way to get the keyboard and mouse 
forwarded through along with VGA?

Thanks!
-Nick



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