28 Oct
2025
28 Oct
'25
1:28 p.m.
On Mon, Oct 27, 2025 at 01:44:30PM -0700, Jacob Pan wrote:
I have a separate question regarding noiommu devices. I’m currently working on adding noiommu mode support for VFIO cdev under iommufd.
Oh how is that going? I was just thinking about that again..
After writing the generic pt self test it occured to me we now have enough infrastructure for iommufd to internally create its own iommu_domain with a AMDv1 page table for the noiommu devices. It would then be so easy to feed that through the existing machinery and have all the pinning/etc work.
Then only an ioctl to read back the physical addresses from this special domain would be needed
It actually sort of feels pretty easy..
Jason