All you USB ports could be connected to the same PCI USB controller.
You can find out to which PCI USB controller each of your ports are connected to like this:
Check it in dom0 if you have all your PCI USB controllers attached to dom0.
All you USB ports could be connected to the same PCI USB controller.
You can find out to which PCI USB controller each of your ports are connected to like this:
Check it in dom0 if you have all your PCI USB controllers attached to dom0.