[PATCH v3 12/19] vfio: Introduce VFIOIOMMUClass::hiod_typename attribute

[Zhenzhong Duan]

Initialize attribute VFIOIOMMUClass::hiod_typename based on
VFIO backend type.

This attribute will facilitate HostIOMMUDevice creation in
vfio_attach_device().

Suggested-by: Cédric Le Goater <clg@redhat.com>
Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
---
 include/hw/vfio/vfio-container-base.h | 3 +++
 hw/vfio/container.c                   | 2 ++
 hw/vfio/iommufd.c                     | 2 ++
 3 files changed, 7 insertions(+)

diff --git a/include/hw/vfio/vfio-container-base.h 
b/include/hw/vfio/vfio-container-base.h
index 3582d5f97a..c387f0d8a4 100644
--- a/include/hw/vfio/vfio-container-base.h
+++ b/include/hw/vfio/vfio-container-base.h
@@ -110,6 +110,9 @@ DECLARE_CLASS_CHECKERS(VFIOIOMMUClass, VFIO_IOMMU, 
TYPE_VFIO_IOMMU)
 struct VFIOIOMMUClass {
     InterfaceClass parent_class;
 
+    /* Properties */
+    const char *hiod_typename;
+
     /* basic feature */
     int (*setup)(VFIOContainerBase *bcontainer, Error **errp);
     int (*dma_map)(const VFIOContainerBase *bcontainer,
diff --git a/hw/vfio/container.c b/hw/vfio/container.c
index 3683487605..57c814fcd5 100644
--- a/hw/vfio/container.c
+++ b/hw/vfio/container.c
@@ -1133,6 +1133,8 @@ static void vfio_iommu_legacy_class_init(ObjectClass 
*klass, void *data)
 {
     VFIOIOMMUClass *vioc = VFIO_IOMMU_CLASS(klass);
 
+    vioc->hiod_typename = TYPE_HOST_IOMMU_DEVICE_LEGACY_VFIO;
+
     vioc->setup = vfio_legacy_setup;
     vioc->dma_map = vfio_legacy_dma_map;
     vioc->dma_unmap = vfio_legacy_dma_unmap;
diff --git a/hw/vfio/iommufd.c b/hw/vfio/iommufd.c
index 6bc2dc68f6..1ac7dea789 100644
--- a/hw/vfio/iommufd.c
+++ b/hw/vfio/iommufd.c
@@ -628,6 +628,8 @@ static void vfio_iommu_iommufd_class_init(ObjectClass 
*klass, void *data)
 {
     VFIOIOMMUClass *vioc = VFIO_IOMMU_CLASS(klass);
 
+    vioc->hiod_typename = TYPE_HOST_IOMMU_DEVICE_IOMMUFD_VFIO;
+
     vioc->dma_map = iommufd_cdev_map;
     vioc->dma_unmap = iommufd_cdev_unmap;
     vioc->attach_device = iommufd_cdev_attach;
-- 
2.34.1