[PATCH v3 02/16] iommufd/viommu: Add a default_viommu_ops for IOMMU_VIOMMU_TYPE_DEFAULT

[Jason Gunthorpe]

On Wed, Oct 09, 2024 at 09:38:14AM -0700, Nicolin Chen wrote:
> An IOMMU_VIOMMU_TYPE_DEFAULT doesn't need a free() op since the core can
> free everything in the destroy(). Now with the new vDEVICE structure, it
> might want to allocate its own vDEVICEs.
> 
> Add a default_viommu_ops for driver to hook ops for default vIOMMUs.

Why? arm_smmu is now creating its own viommu object, so who will use
this?

Do we have any use for the default mode? It is already a bit
confusing, can we just drop it?

Jason