On Fri, Dec 15, 2023 at 12:01:19PM +0800, Yi Liu wrote: > > I think I misread Yi's narrative: dev_id is a working approach > > for VMM to convert to a vRID, while he is asking for a better > > alternative :) > > In concept, dev_id works, but in reality we have problem to get a dev_id > for a given device in intel iommu driver, hence I'm asking for help here. :) I think we just need to solve this one way or another.. Even if you use a viommu object you still end up having difficult coupling to iommufd Some: iommufd_get_dev_id(struct iommufd_ctx *ictx, struct device *dev) Callable by a driver (using the driver-callable function infrastructure we made for dirty tracking) Is really all that is needed here. Jason
