I've tried the script solution and it works perfectly. Thanks!! I will also try to test the kernel module and let you know how it works. <div class="gmail_extra"> <div class="gmail_quote">On Oct 25, 2016 20:35, "Jayme Howard" <<a href="mailto:g.prime@gmail.com">g.prime@gmail.com</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">I appreciate the patch, but it's not a great one for me to test, personally. My issue wasn't actually that I have two identical controllers. Rather, I have one specific controller that I sometimes want to use on the host, so I don't want to assign it to the guest at boot of the host. That's why I actually use the script. On a quick glance though the patch looked solid to me, though I'm not a kernel dev.</div><div class="gmail_extra"> <div class="gmail_quote">On Tue, Oct 25, 2016 at 1:32 PM, Laszlo Ersek <<a href="mailto:lersek@redhat.com" target="_blank">lersek@redhat.com</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">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 <<a href="mailto:andrei.grg@gmail.com" target="_blank">andrei.grg@gmail.com</a> > <mailto:<a href="mailto:andrei.grg@gmail.com" target="_blank">andrei.grg@gmail.com</a>>> 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 > <a href="mailto:vfio-users@redhat.com" target="_blank">vfio-users@redhat.com</a> <mailto:<a href="mailto:vfio-users@redhat.com" target="_blank">vfio-users@redhat.com</a>> > <a href="https://www.redhat.com/mailman/listinfo/vfio-users" rel="noreferrer" target="_blank">https://www.redhat.com/mailman/listinfo/vfio-users</a> > <<a href="https://www.redhat.com/mailman/listinfo/vfio-users" rel="noreferrer" target="_blank">https://www.redhat.com/mailman/listinfo/vfio-users</a>> <div class="m_-1656654058104274235HOEnZb"><div class="m_-1656654058104274235h5">> > > > > _______________________________________________ > vfio-users mailing list > <a href="mailto:vfio-users@redhat.com" target="_blank">vfio-users@redhat.com</a> > <a href="https://www.redhat.com/mailman/listinfo/vfio-users" rel="noreferrer" target="_blank">https://www.redhat.com/mailman/listinfo/vfio-users</a> > </div></div></blockquote></div> </div> </blockquote></div></div>