2 Jan
2024
2 Jan
'24
11:38 p.m.
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