On Mon, 20 Aug 2018 12:34:37 +0800 Alex John <a...@stty.io> wrote: > On Sun, Aug 19, 2018 at 10:57:44PM +0200, Konrad Eisele wrote: > > I try to passthrough the primary graphic card (GForce 710b > > at slot 0000:01:0.0) to a win kvm guest. The host runs > > headless. I have blacklisted the nvidia drivers and bound > > the drivers to vfio-pci on startup. However when starting qemu > > I currently get the error: > > > > (qemu) qemu-system-x86_64: -device vfio-pci,host=01:00.0,multifunction=on: > > Failed to mmap 0000:01:00.0 BAR 3. Performance > > may be slow > > Have you checked if you have a PCI bridge connecting to your graphics card in > the same IOMMU group? Or any other device? > > In that case you should not be able to reserve memory at all, but no harm > checking.
This doesn't make any sense. A driver can certainly reserve device resources regardless of the device being downstream of a bridge. Thanks, Alex _______________________________________________ vfio-users mailing list vfio-users@redhat.com https://www.redhat.com/mailman/listinfo/vfio-users
