> Another advantage to this approach is that we can specify a driver > override to force a specific binding or prevent any binding. For > instance when an IOMMU group is exposed to userspace through VFIO > we require that all devices within that group are owned by VFIO. > However, devices can be hot-added into an IOMMU group, in which case > we want to prevent the device from binding to any driver (preferred > driver = "none") or perhaps have it automatically bind to vfio-pci. > With driver_override it's a simple matter for this field to be set > internally when the device is first discovered to prevent driver > matches.
Alex, I think the patch looks good, but did have a question about the hot-adding device scenario above. How do you get the "field to be set internally when the device is first discovered"? What hook is there to do that prior to the driver match processing? Thanks, Stuart _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
