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On 12/09/17 13:57, Julien Grall wrote: > Hi, > > On 12/09/17 11:00, 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 >> OK, after applying the above 2 patches to v4.12 kernel for domU I'm able to see the xen HCD driver enumerate, but it times out most likely due to the missing pvusb backend. [ 0.510149] vusb vusb-0: Xen USB2.0 Virtual Host Controller [ 0.510192] vusb vusb-0: new USB bus registered, assigned bus number 1 [ 0.510811] hub 1-0:1.0: USB hub found [ 0.510865] hub 1-0:1.0: 4 ports detected [ 0.812721] vusb vusb-1: Xen USB1.1 Virtual Host Controller [ 0.812760] vusb vusb-1: new USB bus registered, assigned bus number 2 [ 0.813356] hub 2-0:1.0: USB hub found [ 0.813410] hub 2-0:1.0: 4 ports detected ... [ 5.888997] xenbus_probe_frontend: Waiting for devices to initialise: 25s...20s...15s...10s...5s...0s... [ 35.919000] 235s...230s...225s...220s...215s...210s...205s...200s...195s...190s...185s...180s...175s...170s...165s...160s...155s...150s...145s...140s...135s...130s...125s...120s...115s...110s...105s...100s...95s...90s...85s...80s...75s...70s...65s...60s...55s...50s...45s...40s...35s...30s...25s...20s...15s...10s...5s...0s... [ 270.879130] [ 270.884161] xenbus_probe_frontend: Timeout connecting to device: device/vusb/0 (local state 1, remote state 1) [ 270.887059] xenbus_probe_frontend: Timeout connecting to device: device/vusb/1 (local state 1, remote state 1) >> The question is whether this will be enough for you to make it work: the >> pvusb backend is qemu based. I'm not sure this will just work on ARM. > > Backends in QEMU should just work with ARM. Although, I haven't tried the > PVUSB one. > Newbie question now. How do I start the QEMU pvusb backend on dom0? -- cheers, -roger _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org https://lists.xen.org/xen-devel