[PATCH v4 05/11] iommufd: Add domain_alloc_nested op to iommufd_viommu_ops

[Tian, Kevin]

> From: Nicolin Chen <nicolinc at nvidia.com>
> Sent: Tuesday, October 22, 2024 8:19 AM
> 
> Allow IOMMU driver to use a vIOMMU object that holds a nesting parent
> hwpt/domain to allocate a nested domain.
> 
> Suggested-by: Jason Gunthorpe <jgg at nvidia.com>
> Signed-off-by: Nicolin Chen <nicolinc at nvidia.com>

Reviewed-by: Kevin Tian <kevin.tian at intel.com>