[PATCH v7 04/24] iommu: Add IOMMU_DOMAIN_PLATFORM for S390

[Jerry Snitselaar]

On Wed, Aug 23, 2023 at 01:47:18PM -0300, Jason Gunthorpe wrote:
> The PLATFORM domain will be set as the default domain and attached as
> normal during probe. The driver will ignore the initial attach from a NULL
> domain to the PLATFORM domain.
> 
> After this, the PLATFORM domain's attach_dev will be called whenever we
> detach from an UNMANAGED domain (eg for VFIO). This is the same time the
> original design would have called op->detach_dev().
> 
> This is temporary until the S390 dma-iommu.c conversion is merged.
> 
> Tested-by: Heiko Stuebner <heiko at sntech.de>
> Tested-by: Niklas Schnelle <schnelle at linux.ibm.com>
> Reviewed-by: Lu Baolu <baolu.lu at linux.intel.com>
> Signed-off-by: Jason Gunthorpe <jgg at nvidia.com>

Reviewed-by: Jerry Snitselaar <jsnitsel at redhat.com>