[Xen-users] Quick trick on matching USB root hubs to PCI ids

[David Sutton <pere@xxxxxxxxxxxx>]

Hi all,

  I was looking through some archived posts in this forum, and noticed a few 
people mentioning having to use trial and error when trying to use PCI 
passthrough to get a USB root hub passed through to a HVM domU. I thought I'd 
share something I noticed which made this much easier for me. 

  Say I wanted to pass through a root hub which has my USB Plantronics headset 
connected to it. The 'lsusb' command shows me that the device is on the 
following:

Bus 011 Device 006: ID 047f:c006 Plantronics, Inc. 

  It also shows me the root hub for Bus 011:

Bus 011 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

  You can then run the following command, either as root or via sudo: 

# lsusb -s 011:001 -v | grep iSerial

  iSerial                 1 0000:00:16.0

And the PCI id is 0000:00:16.0

Hope this helps,

  David

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