Introduce host_iommu_device_init callback and a wrapper for it.

Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
---
 include/hw/vfio/vfio-common.h         | 1 +
 include/hw/vfio/vfio-container-base.h | 1 +
 hw/vfio/common.c                      | 8 ++++++++
 3 files changed, 10 insertions(+)

diff --git a/include/hw/vfio/vfio-common.h b/include/hw/vfio/vfio-common.h
index 24e3eaaf3d..9c4b60c906 100644
--- a/include/hw/vfio/vfio-common.h
+++ b/include/hw/vfio/vfio-common.h
@@ -216,6 +216,7 @@ struct vfio_device_info *vfio_get_device_info(int fd);
 int vfio_attach_device(char *name, VFIODevice *vbasedev,
                        AddressSpace *as, Error **errp);
 void vfio_detach_device(VFIODevice *vbasedev);
+void host_iommu_device_init(VFIODevice *vbasedev);
 
 int vfio_kvm_device_add_fd(int fd, Error **errp);
 int vfio_kvm_device_del_fd(int fd, Error **errp);
diff --git a/include/hw/vfio/vfio-container-base.h b/include/hw/vfio/vfio-container-base.h
index b2813b0c11..c71f4abb2d 100644
--- a/include/hw/vfio/vfio-container-base.h
+++ b/include/hw/vfio/vfio-container-base.h
@@ -120,6 +120,7 @@ struct VFIOIOMMUClass {
     int (*attach_device)(const char *name, VFIODevice *vbasedev,
                          AddressSpace *as, Error **errp);
     void (*detach_device)(VFIODevice *vbasedev);
+    void (*host_iommu_device_init)(VFIODevice *vbasedev);
     /* migration feature */
     int (*set_dirty_page_tracking)(const VFIOContainerBase *bcontainer,
                                    bool start);
diff --git a/hw/vfio/common.c b/hw/vfio/common.c
index 8b3b575c9d..f7f85160be 100644
--- a/hw/vfio/common.c
+++ b/hw/vfio/common.c
@@ -1521,3 +1521,11 @@ void vfio_detach_device(VFIODevice *vbasedev)
     }
     vbasedev->bcontainer->ops->detach_device(vbasedev);
 }
+
+void host_iommu_device_init(VFIODevice *vbasedev)
+{
+    const VFIOIOMMUClass *ops = vbasedev->bcontainer->ops;
+
+    assert(ops->host_iommu_device_init);
+    ops->host_iommu_device_init(vbasedev);
+}
-- 
2.34.1