usb3=yes not working?

[sshaikh]

I'm trying to pass through a USB3 device as per:

https://pve.proxmox.com/wiki/USB_Devices_in_Virtual_Machines

As I am running PVE5.0, I understand that all I should need to do is set usb3=yes, so something like this:

usb0: host:4-1,usb3=yes

However this doesn't work. I do see a new xhci controller in the Windows guest, but it is in an error state with

"This device cannot find enough free resources that it can use. (Code 12)

And so the USB 3 device isn't detected.

I see that in previous versions we also had to add in a different way:

args: -device nec-usb-xhci,id=xhci,addr=0x1b,bus=pci.1 -device usb-host,bus=xhci.0,vendorid=0x0480,productid=0xa007

But I read this approach as being deprecated for QEMU > 4.

If it makes any difference, I am also passing though an nVidia GPU.

 

[Milkwyrm]

If you're using PVE5.0 just do it via the GUI. On the hardware tab, just add USB device. Select your USB device/Drive and check the box for USB3.
Works perfectly here for passing through an RDX cartridge for backups.

 

[sshaikh]

No dice I'm afraid, I see the same issue:

http://imgur.com/WiF5HOR

 

[sshaikh]

So it seems that the VGA passthrough is the issue. For that to work I need:

hostpci0: 01:00,pcie=1,x-vga=on

Which in turn needs:

machine: q35

And apparently nec-usb-xhci doesn't work with q35, as it is attached to a PCI slot instead of a PCIE slot (?)

Any tips on how to fix this? The issue appears to be in the following generated flag:

-device 'nec-usb-xhci,id=xhci,bus=pci.1,addr=0x1b'

I tried setting this manually to

-device 'nec-usb-xhci,id=xhci,bus=pcie.0,addr=0x1b'

but I get the following error:

kvm:/usr/share/qemu-server/pve-q35.cfg:62: PCI: slot 27 function 0 not available for ich9-intel-hda, in use by nec-usb-xhci

 

[sshaikh]

The trick it seems is to manually add the usb devices. For eg:

args: -device nec-usb-xhci,id=xhci -device usb-host,bus=xhci.0,hostbus=4,hostport=2

Omitting bus and addr seems to allow the nec-usb-xhci driver to assign to pcie.

That said, my USB devices still don't like this and I'm getting tons of disconnects. I may try passing through the whole USB controller next - does anyone know how this might be achieved?

EDIT:

lspci -v to get the address, and then add it to your vm config as usual:

hostpci1: [id]