Resctrl and I/O

[Jason Gunthorpe]

On Wed, Sep 23, 2026 at 06:13:27PM +0100, James Morse wrote:

> Using iommu_group like this may need a bit more thinking....
> If we can fall back to using a device as seen by sysfs, then the arch differences
> here could be invisible to user-space.

Please don't codify iommu_groups in any new uAPI, that has proven to
be a problematic choice for VFIO. We undid it.. Lets not repeat it.

Jason