From mboxrd@z Thu Jan  1 00:00:00 1970
From: Pasi =?iso-8859-1?Q?K=E4rkk=E4inen?= <pasik@iki.fi>
Subject: Re: Bug: USB Bridge Will Not PassThru
Date: Wed, 18 Jun 2014 18:47:20 +0300
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On Wed, Jun 18, 2014 at 08:28:46AM -0700, merc1984@f-m.fm wrote:
> 
>      USB2 is not possible with qemu-traditional.
> 
>      You've have to use PVUSB, which has USB2 support, if you have the
>      drivers.
> 
> 
>    So a USB2 hardware device is still emulated in the domU, even when
>    passed-thru?  It's not passing through the hardware? (like it seems it
>    should)
> 

USB passthru to an HVM guest Qemu emulated USB controller means Qemu emulation, yes.
And like said qemu-traditional only emulates USB 1.1 controllers/devices.

PVUSB is another option, it supports passthru of USB2 devices,
but it requires special drivers in both dom0 and guest kernel.


-- Pasi