EHCI / XHCI Emulation in HVM Guest
Hi,
I have been using xen 4.4 to emulate EHCI/XHCI in Ubuntu HVM Guest. I have specified usbviersion 2 for EHCI in HVM config file.
However, I am unable to see UHCI / EHCI emulated controller in HVM Guest. If I do not specify usbversion in HVM then I can see UHCI emulated controller present in HVM Guest.
Is this a limitation of Xen 4.4? Xen 4.5 will come up with complete Emulation of EHCI / XHCI? If yes, then May I know tentative date of Xen 4.5 Release?
As I have to run multiple HVM Guest OSs with EHCI and XHCI, so I can have better USB performance.
I am looking forware to your response. And also let me know if you need amy more information.
Thanks in advance.

2 comments
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usbversion={2,3} will work with 4.5, but at the moment it doesn't interoperate with emulated qemu devices or host USB pass-through. Is that the functionality you're looking for?
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Fabio Fantoni commented
For now (in xen 4.4) usb 2 anb usb3 controllers are used only by spice usb redirection.