Re: Physical USB port addressing

[Thomas Huth]

On 25/03/2022 19.13, Narcis Garcia wrote:
> Some versions ago I could specify a host plugged device with this:
> -usbdevice host:2001:3c17
> but now I don't find a syntax that works for me (I also wish to ignore which 
> physical port is device connected to):
>
> $ lsusb
> Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
> Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
> Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
> Bus 001 Device 034: ID 2001:3c17 D-Link Corp. DWA-123 Wireless N 150 
> Adapter(rev.A1) [Ralink RT3370]
> Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
>
> $ qemu-system-x86_64 --version
> QEMU emulator version 5.2.0 (Debian 1:5.2+dfsg-11+deb11u1)
> Copyright (c) 2003-2020 Fabrice Bellard and the QEMU Project developers
> $ qemu-system-x86_64 (...) -device usb-host,vendorid=2001,productid=3c17
> qemu-system-x86_64: -device usb-host,vendorid=2001,productid=3c17: No 
> 'usb-bus' bus found for device 'usb-host'

That error message means that there isn't a USB host controller defined for 
your guest. Try to add an additional "-device qemu-xhci" or something 
similar before the "-device usb-host,..." in your command line.

 HTH,
  Thomas