Re: USB on DomU

[David Kowis <david@xxxxxx>]

On 2020-06-18 11:46, Martin Hargreaves wrote:
> Dear Xen Community,
>
> I have recently created an Ubuntu 16.04 Guest DomU which seems to run
> okay but I’m struggling for it to see USBs.
If your VM is not HVM, it needs the PVUSB drivers, which I only know of 
from here: https://github.com/jgross1/linux/tree/pvusb
I got it from here: 
https://lists.xenproject.org/archives/html/xen-users/2019-08/msg00013.html
I don't know if those drivers are updated more often. I haven't gotten 
around to using them yet, other things keep getting in the way.
An HVM VM should do USB passthrough natively, and not need any PV 
drivers.
> On my host Dom0 system, a ‘lsusb’  shows my device as..
> Bus 002 Device 005: ID 058f:6387 Alcor Micro Corp. Flash Drive
>
> In my config file I use the settings…
>
> usbctrl=[ 'type=auto,version=2' ]
> usbdev=[ 'hostbus=2,hostaddr=5' ]
>
> As I issue the xl create command, the USB mounted on Dom0 is unmounted
> (I don’t know if this is expected) and my DomU seems to start ok.
> However, when I do an ‘lsusb’ I can’t see it when in my DomU.
> On Dom0 (ID=3), if I issue the following command,  it seems like it has 
> worked.
> root@Dell-e6400-2:~# xl usb-list 3
> Devid  Type         BE  state usb-ver ports
> 0      qusb         0   1     2       8
>   Port 1: Bus 002 Device 005
>   Port 2:
>   Port 3:
>   Port 4:
>   Port 5:
>   Port 6:
>   Port 7:
>   Port 8:
>
> Am I missing a further step to see the USB device in my DomU?
>
>   Thank you for any insights that anyone may have.
>
>     Martin...