Oh this is interesting, i will definitely try this. Even if it is not exposed to libvirt we can pass custom command line parameters via xml. Thanks a lot!
Rokas Kupstys On 2016.08.24 03:31, Samuel Holland wrote: > Hello, > > On 08/23/2016 02:07 AM, Rokas Kupstys wrote: >> Is it possible to pass-through USB port? I know we can pass-through >> specific usb devices or entire usb controllers however it is not >> ideal in all cases. > > Sorry for all of the not-quite-accurate answers you've gotten. You > _can_, in fact, pass through a USB port by its location: > > $ qemu-system-x86_64 -device usb-host,? 2>&1 | sort > usb-host.bootindex=int32 > usb-host.full-path=bool (on/off) > usb-host.hostaddr=uint32 > usb-host.hostbus=uint32 > usb-host.hostport=str > usb-host.isobsize=uint32 > usb-host.isobufs=uint32 > usb-host.loglevel=uint32 > usb-host.msos-desc=bool (on/off) > usb-host.pipeline=bool (on/off) > usb-host.port=str > usb-host.productid=uint32 > usb-host.serial=str > usb-host.vendorid=uint32 > > See the hostbus and hostport options. I don't know if this is exposed by > libvirt, since I don't use that, but at least qemu has support for it. > >> Is there any solution to this? > > Passing through a port using `-device usb-host,hostbus=foo,hostport=bar` > is one solution. Another solution can be to use your several integrated > USB controllers (if you have an Intel chipset). Even though all of your > devices may show up on one controller, you can change which controller > the ports are attached to in the PCI configuration space. See [1] and > the thread at [2]. > > Hope that helps, > Samuel > > [1] http://sholland.org/thoughts.html#2016-02-29 > [2] > https://www.redhat.com/archives/vfio-users/2016-February/msg00110.html > > _______________________________________________ > vfio-users mailing list > vfio-users@redhat.com > https://www.redhat.com/mailman/listinfo/vfio-users > _______________________________________________ vfio-users mailing list vfio-users@redhat.com https://www.redhat.com/mailman/listinfo/vfio-users
