From mboxrd@z Thu Jan  1 00:00:00 1970
From: Gerd Hoffmann <kraxel@redhat.com>
Subject: Re: [RFC PATCH] KVM-test: Add subtest: usb
Date: Tue, 02 Aug 2011 16:24:57 +0200
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To: Amos Kong <akong@redhat.com>
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   Hi,

> I found you had added new cmdline support of usb(ahci,usb2) for autotest.
> But it's not supported right now.
>
> "12:42:16 INFO | (qemu) *** EHCI support is under development ***"

It should work fine nevertheless.  EHCI still lacks some stuff such as 
migration support, thats why I didn't remove that banner yet.

> So I plan to use old options, "-usbdevice disk:format=qcow2:/tmp/usbdevice.qcow2".

That will give you a flashdrive on a UHCI (USB 1.1) port instead of EHCI 
(USB 2.0).  Will be slower.  Should work just fine too.

cheers,
   Gerd