On 10/25/16 16:30, Jayme Howard wrote: > I'm doing exactly this with no significant problem. The way I handle it > is that I've got a script that binds the specific card to vfio-pci at > runtime, and I call that as a part of my startup script for the VM. > > /usr/local/bin/vfio-bind > #!/bin/bash > > modprobe vfio-pci > > for dev in "$@"; do > vendor=$(cat /sys/bus/pci/devices/$dev/vendor) > device=$(cat /sys/bus/pci/devices/$dev/device) > if [ -e /sys/bus/pci/devices/$dev/driver ]; then > echo $dev > /sys/bus/pci/devices/$dev/driver/unbind > fi > echo $vendor $device > /sys/bus/pci/drivers/vfio-pci/new_id > done > > Then I just add "-device vfio-pci,host=<address>" to the args to qemu. > Works like a charm. The script is called with the format > "0000:06:00.0", the args to qemu are "06:00.0". Your address may vary, > of course.
I posted a kernel patch for this, and CC'd you guys on it. If you could test it, that would be great. The intended use is that you keep your current pci-stub.ids=... options, but add pci-stub.except=0000:03:00.0,... for those devices that you want pci-stub to ignore. This will cause 0000:03:00.0 to be bound by the appropriate host driver, while the rest of the ID- and class-matched devices will be claimed by pci-stub (and therefore they'll be eligible for assignment, assuming all other conditions are met). If I misunderstood the original problem (~ having two identical PCI USB controllers and intending to assign only one of them), then my bad. Thanks Laszlo > On Tue, Oct 25, 2016 at 6:11 AM, Andrei Grigore <andrei....@gmail.com > <mailto:andrei....@gmail.com>> wrote: > > Hi, > > Does anyone know of an easy way to pass through a USB PCI controller > in QEMU w/o libvirt? Since libvirt automatically binds the > controller to VFIO, without it I get VFIO not found error messages. > > I am getting slightly better performance with a QEMU script rather > than using virt-manager. I cannot bind them on boot since I have the > same id for all USBs. > > Thanks! > > > _______________________________________________ > vfio-users mailing list > vfio-users@redhat.com <mailto:vfio-users@redhat.com> > https://www.redhat.com/mailman/listinfo/vfio-users > <https://www.redhat.com/mailman/listinfo/vfio-users> > > > > > _______________________________________________ > 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
