Merge branch 'ko-iommufd/wip/for-nesting' into k.o-iommufd/for-next

Temporary, waiting for the rest of the cdev patches for Linus

* ko-iommufd/wip/for-nesting:
  iommufd/selftest: Add a selftest for IOMMU_HWPT_ALLOC
  iommufd/selftest: Return the real idev id from selftest mock_domain
  iommufd: Add IOMMU_HWPT_ALLOC
  iommufd/selftest: Test iommufd_device_replace()
  iommufd: Make destroy_rwsem use a lock class per object type
  iommufd: Add iommufd_device_replace()
  iommu: Introduce a new iommu_group_replace_domain() API
  iommufd: Reorganize iommufd_device_attach into iommufd_device_change_pt
  iommufd: Add enforced_cache_coherency to iommufd_hw_pagetable_alloc()
  iommufd: Move putting a hwpt to a helper function
  iommufd: Make sw_msi_start a group global
  iommufd: Use the iommufd_group to avoid duplicate MSI setup
  iommufd: Keep track of each device's reserved regions instead of groups
  iommu: Export iommu_get_resv_regions()
  iommufd: Replace the hwpt->devices list with iommufd_group
  iommufd: Add iommufd_group
  iommufd: Move isolated msi enforcement to iommufd_device_bind()