1 files changed, 53 insertions, 0 deletions
diff --git a/include/sysemu/host_iommu_device.h b/include/sysemu/host_iommu_device.h
new file mode 100644
index 0000000000..db47a16189
--- /dev/null
+++ b/include/sysemu/host_iommu_device.h
@@ -0,0 +1,53 @@
+/*
+ * Host IOMMU device abstract declaration
+ *
+ * Copyright (C) 2024 Intel Corporation.
+ *
+ * Authors: Zhenzhong Duan <zhenzhong.duan@intel.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2.  See
+ * the COPYING file in the top-level directory.
+ */
+
+#ifndef HOST_IOMMU_DEVICE_H
+#define HOST_IOMMU_DEVICE_H
+
+#include "qom/object.h"
+#include "qapi/error.h"
+
+#define TYPE_HOST_IOMMU_DEVICE "host-iommu-device"
+OBJECT_DECLARE_TYPE(HostIOMMUDevice, HostIOMMUDeviceClass, HOST_IOMMU_DEVICE)
+
+struct HostIOMMUDevice {
+    Object parent_obj;
+
+    char *name;
+};
+
+/**
+ * struct HostIOMMUDeviceClass - The base class for all host IOMMU devices.
+ *
+ * Different types of host devices (e.g., VFIO or VDPA device) or devices
+ * with different backend (e.g., VFIO legacy container or IOMMUFD backend)
+ * will have different implementations of the HostIOMMUDeviceClass.
+ */
+struct HostIOMMUDeviceClass {
+    ObjectClass parent_class;
+
+    /**
+     * @realize: initialize host IOMMU device instance further.
+     *
+     * Mandatory callback.
+     *
+     * @hiod: pointer to a host IOMMU device instance.
+     *
+     * @opaque: pointer to agent device of this host IOMMU device,
+     *          e.g., VFIO base device or VDPA device.
+     *
+     * @errp: pass an Error out when realize fails.
+     *
+     * Returns: true on success, false on failure.
+     */
+    bool (*realize)(HostIOMMUDevice *hiod, void *opaque, Error **errp);
+};
+#endif