Re: [Qemu-devel] [PATCH v3] libxl: usb2 and usb3 controller support for upstream qemu

[Fabio Fantoni <fabio.fantoni@m2r.biz>]

Il 14/08/2013 12:30, Fabio Fantoni ha scritto:
> Il 18/07/2013 14:35, Paolo Bonzini ha scritto:
>> Il 18/07/2013 14:31, Andreas Färber ha scritto:
>>>>> I'm just curious, why is this so complicated?  Is this likely to be
>>>>> fragile and break in the future?
>>> As pointed out previously, the bus=pci.0 bit will break with different
>>> PCI host bridges, such as the q35 machine existing today (-M q35 uses
>>> pcie.0 instead and it has been discussed to make q35 the default at 
>>> some
>>> point). I had thus suggested to use a variable for the bus name to
>>> abstract it. For -M pc-i440fx-1.5 etc. pci.0 should continue to work.
>> I think if we ever made a PCIe machine the default, it would be
>> different from what today's q35.  In particular it probably should
>> include a default DMI-to-PCI bridge, so as to make the command line
>> compatible with i440FX-based machines.
>>
>> Paolo
>
> FWIK q35 is not supported now on xen.
> Anyone on this?
>
> Based on Anthony Liguori reply the usb2 hardcoded parameter should be 
> stable and will be supported in future:
> http://lists.xen.org/archives/html/xen-devel/2013-07/msg01692.html
>
> There is also reply of Ian Jackson:
> http://lists.xen.org/archives/html/xen-devel/2013-07/msg01702.html
>
> I had also posted v4 of patch:
> http://lists.xen.org/archives/html/xen-devel/2013-07/msg01101.html
>
>
> Reposted the tests results:
>
> Tested on linux domU (ubuntu 12.04 64 bit) with usb redirection:
> - with usb1 and usb2 working and no problem found.
>
> - with usb3 linux sees the usb3 controller but usbredirection not 
> working (tested with qemu 1.3 of xen-unstable)
>
> Tested on windows 7 pro 64 bit domU with usb redirection:
>
> - with usb1 not working, windows sees the usb devices (flash mass 
> storage) with error (unable to start device, code 10); seems
> windows bugs.
>
> - with usb2 working and no problem found.
>
> - with usb3 not working, windows sees the usb controller but 
> usbredirection is not working (tested with qemu 1.3 of xen-unstable)
>
> About usb3 seems that qemu does not support some functionalities for now.
>
> Qemu log on usb3 test:
> xhci_cap_read: reg 2 unimplemented
> xhci: unimplemented command 52
> xhci: ERDP out of bounds: 7e7d5000
> xhci: ER[7] at 0 len 0
> xhci: asserted controller error
> xhci: ERDP out of bounds: 7eace000
> xhci: ER[6] at 0 len 0
> xhci: asserted controller error
> ...
> xhci: slot 1 has no device
> xhci: error firing data transfer
>
>
>
> There wasn't any reply about this for one month. usb1 controller is 
> already supported by xen but it has some problems with latest windows. 
> usb2 works with both linux and windows but it needs this patch or a 
> similar one to add support on xen. usb3 can be removed for now if 
> someone think unimplemented functions are a problem.
> Thanks for any reply.

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