RE: [PATCH v2 03/11] iommufd/hw_pagetable: Use domain_alloc_user op for domain allocation

[Tian, Kevin]

> From: Yi Liu <yi.l.liu@xxxxxxxxx>
> Sent: Thursday, May 11, 2023 10:39 PM
> 
> 
> @@ -88,7 +90,10 @@ iommufd_hw_pagetable_alloc(struct iommufd_ctx
> *ictx, struct iommufd_ioas *ioas,
>  	refcount_inc(&ioas->obj.users);
>  	hwpt->ioas = ioas;
> 
> -	hwpt->domain = iommu_domain_alloc(idev->dev->bus);
> +	if (ops->domain_alloc_user)
> +		hwpt->domain = ops->domain_alloc_user(idev->dev, NULL,
> NULL);
> +	else
> +		hwpt->domain = iommu_domain_alloc(idev->dev->bus);

this reminds the comment for @domain_alloc_user() should clarify
that UNMANGED domain type is assumed when no user data is 
provided, to be compatible with iommu_domain_alloc().