Re: [PATCH 2/2] iommu/amd: Force identity mode for selected GPUs only

On Wed, Aug 05, 2026 at 05:22:22PM +0000, Deucher, Alexander wrote:

> IIRC, they supported SME, but it wasn't usable due to other
> limitations (e.g., the requirement for identity mappings due to the
> display hw bug and the latency impact of encryption for displays in
> system memory).  Do you could effectively pick either SME or
> displays.

IMHO the GPU driver should fail if it cannot work because it can't
reach the IOVA space requried for SME ...

I don't think this should be a iommu problem to deal with

Jason