Merge: vfio migration support

MR: https://gitlab.com/redhat/centos-stream/src/kernel/centos-stream-9/-/merge_requests/1980

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2165989

Upstream Status: mainline

Testing: PF/VF NIC assignment, Intel/NVIDIA vGPU assignment, NVIDIA GPU assignment.
Regression testing only.

Backport support for vfio migration features

Signed-off-by: Alex Williamson <alex.williamson@redhat.com>

Approved-by: Eric Auger <eric.auger@redhat.com>
Approved-by: Cédric Le Goater <clg@redhat.com>

Signed-off-by: Herton R. Krzesinski <herton@redhat.com>

Author: Herton R. Krzesinski

drivers/vfio/Kconfig

@@ -3,6 +3,7 @@ menuconfig VFIO
 	tristate "VFIO Non-Privileged userspace driver framework"
 	select IOMMU_API
 	select VFIO_IOMMU_TYPE1 if MMU && (X86 || S390 || ARM || ARM64)
+	select INTERVAL_TREE
 	help
 	  VFIO provides a framework for secure userspace device drivers.
 	  See Documentation/driver-api/vfio.rst for more details.

drivers/vfio/Makefile

@@ -1,9 +1,11 @@
 # SPDX-License-Identifier: GPL-2.0
 vfio_virqfd-y := virqfd.o
 
-vfio-y += vfio_main.o
-
 obj-$(CONFIG_VFIO) += vfio.o
+
+vfio-y += vfio_main.o \
+	  iova_bitmap.o \
+
 obj-$(CONFIG_VFIO_VIRQFD) += vfio_virqfd.o
 obj-$(CONFIG_VFIO_IOMMU_TYPE1) += vfio_iommu_type1.o
 obj-$(CONFIG_VFIO_IOMMU_SPAPR_TCE) += vfio_iommu_spapr_tce.o