[PATCH v3 02/19] vfio/container: Introduce HostIOMMUDeviceLegacyVFIO device

[Zhenzhong Duan]

HostIOMMUDeviceLegacyVFIO represents a host IOMMU device under VFIO
legacy container backend.

It includes a link to VFIODevice.

Suggested-by: Eric Auger <eric.auger@redhat.com>
Suggested-by: Cédric Le Goater <clg@redhat.com>
Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
---
 include/hw/vfio/vfio-common.h | 12 ++++++++++++
 hw/vfio/container.c           |  6 +++++-
 2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/include/hw/vfio/vfio-common.h b/include/hw/vfio/vfio-common.h
index b9da6c08ef..aa3abe0a18 100644
--- a/include/hw/vfio/vfio-common.h
+++ b/include/hw/vfio/vfio-common.h
@@ -31,6 +31,7 @@
 #endif
 #include "sysemu/sysemu.h"
 #include "hw/vfio/vfio-container-base.h"
+#include "sysemu/host_iommu_device.h"
 
 #define VFIO_MSG_PREFIX "vfio %s: "
 
@@ -147,6 +148,17 @@ typedef struct VFIOGroup {
     bool ram_block_discard_allowed;
 } VFIOGroup;
 
+#define TYPE_HOST_IOMMU_DEVICE_LEGACY_VFIO TYPE_HOST_IOMMU_DEVICE 
"-legacy-vfio"
+OBJECT_DECLARE_SIMPLE_TYPE(HostIOMMUDeviceLegacyVFIO,
+                           HOST_IOMMU_DEVICE_LEGACY_VFIO)
+
+/* Abstract of host IOMMU device with VFIO legacy container backend */
+struct HostIOMMUDeviceLegacyVFIO {
+    HostIOMMUDevice parent_obj;
+
+    VFIODevice *vdev;
+};
+
 typedef struct VFIODMABuf {
     QemuDmaBuf buf;
     uint32_t pos_x, pos_y, pos_updates;
diff --git a/hw/vfio/container.c b/hw/vfio/container.c
index 77bdec276e..3b6826996a 100644
--- a/hw/vfio/container.c
+++ b/hw/vfio/container.c
@@ -1148,7 +1148,11 @@ static const TypeInfo types[] = {
         .name = TYPE_VFIO_IOMMU_LEGACY,
         .parent = TYPE_VFIO_IOMMU,
         .class_init = vfio_iommu_legacy_class_init,
-    },
+    }, {
+        .name = TYPE_HOST_IOMMU_DEVICE_LEGACY_VFIO,
+        .parent = TYPE_HOST_IOMMU_DEVICE,
+        .instance_size = sizeof(HostIOMMUDeviceLegacyVFIO),
+    }
 };
 
 DEFINE_TYPES(types)
-- 
2.34.1