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Re: [Xen-devel] USB passthrough with Xen on ARM

On 12/09/17 12:52, Roger Quadros wrote:
> Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. 
> Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki
> On 12/09/17 13:00, Juergen Gross wrote:
>> On 12/09/17 10:13, Roger Quadros wrote:
>>> Hi,
>>> I'm running Xen v4.9 on DRA7 (OMAP5/ArmV7) with Linux kernel v3.14 
>>> (yikes!!) on dom0 and domU.
>>> I'm struggling to get USB passthrough working using pvUSB.
>>> My domU config file contains
>>>    usb = 1
>>>    usbctrl = ['type=qusb,version=2,ports=4', 'type=qusb,version=1, 
>>> ports=4', ]
>>> I can see the vusb-0 and vusb-1 platform devices in /sys/devices
>>> And the following message on domU kernel log
>>> [    1.849572] xenbus_probe_frontend: Device with no driver: device/vusb/0
>>> [    1.849627] xenbus_probe_frontend: Device with no driver: device/vusb/1
>>> This means that there is no device driver for the vusb host controllers.
>>> What is the way forward? Do I need to apply some patches to the domU kernel 
>>> to
>>> add support for the USB frontend HCD drivers? 
>> This is one mandatory step, yes. You'll need:
>> https://lkml.org/lkml/2015/6/23/34
>> https://lkml.org/lkml/2015/6/23/36
> Thanks, I'll give these a try. Looks like the kernel folks didn't take this 
> in yet.
> Are there some alternative plans to get this or something alternate upstream?

I hope to find some time to upstream the patches. There has been a
request to add more documentation regarding the Xen pv device framework
which I haven't found time to write...


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