RE: [PATCH v3 03/17] iommufd/hw_pagetable: Use domain_alloc_user op for domain allocation

[Tian, Kevin]

> From: Liu, Yi L <yi.l.liu@xxxxxxxxx>
> Sent: Monday, July 24, 2023 7:04 PM
> 
> This makes IOMMUFD to use iommu_domain_alloc_user() for
> iommu_domain
> creation as IOMMUFD needs to support iommu_domain allocation with
> parameters from userspace in nesting support. If the iommu driver
> doesn't provide domain_alloc_user callback then it falls back to use
> iommu_domain_alloc().
> 
> Suggested-by: Jason Gunthorpe <jgg@xxxxxxxxxx>
> Reviewed-by: Lu Baolu <baolu.lu@xxxxxxxxxxxxxxx>
> Co-developed-by: Nicolin Chen <nicolinc@xxxxxxxxxx>
> Signed-off-by: Nicolin Chen <nicolinc@xxxxxxxxxx>
> Signed-off-by: Yi Liu <yi.l.liu@xxxxxxxxx>

Reviewed-by: Kevin Tian <kevin.tian@xxxxxxxxx>