Re: [Qemu-devel] Re: Qemu/KVM ehci support

[Mark Burkley]

On Thu, 11 Dec 2008 10:52:10 -0800, you wrote:

>Hi Mark,
>
>Mark Burkley wrote:
>> On Mon, 24 Nov 2008 17:21:35 -0800, MaxK wrote:
>>> Mark, I'm planning on playing with it some more later today. If you have 
>>> an updated version please send me a patch or a GIT tree to pull from.
>>> My first attempt as you remember was not very successful (ie XP was just 
>>> crashing).
>> 
>> I never did find out why that was happening but I will update the
>> patch against trunk and retest today to see if I can duplicate the
>> problem.
>
>Do you have an updated patch ?

I got tangled up trying to install git and get a hole poked in the
firewall then had to go firefighting.  Apologies again, I'll try to
follow up on the status tomorrow.  git port should be open on our
server but I will have to check.

>btw I noticed a FIXME in the code that said that host device handoff is 
>not supported yet (or something along those lines). Does that mean that 
>we cannot yet use Linux host devices with EHCI ?
>Also how did you test EHCI in general ? 'info ehci' monitor command is 
>commented out and if I try to un-comment/call it qemu dies.

That's probably why it is commented out - I didn't get around to
merging the info command.

I tested primarily using mass storage devices.  It used to work with
mice and printers too but I haven't tested those lately.  Basically
any device that uses bulk and/or interrupt but not isochronous should
work.

The handoff refers to the handoff from EHCI to UHCI if a device is
USB1.1.  At the moment EHCI handles all devices whether they are 1.1
or 2.0 though this isn't actually an issue due to backward
compatibility.