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diff --git a/include/VBox/vmm/pdmasynctask.h b/include/VBox/vmm/pdmasynctask.h
new file mode 100644
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+++ b/include/VBox/vmm/pdmasynctask.h
@@ -0,0 +1,74 @@
+/** @file
+ * PDM - Pluggable Device Manager, Async Task.
+ */
+
+/*
+ * Copyright (C) 2007-2023 Oracle and/or its affiliates.
+ *
+ * This file is part of VirtualBox base platform packages, as
+ * available from https://www.virtualbox.org.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, in version 3 of the
+ * License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses>.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
+ * in the VirtualBox distribution, in which case the provisions of the
+ * CDDL are applicable instead of those of the GPL.
+ *
+ * You may elect to license modified versions of this file under the
+ * terms and conditions of either the GPL or the CDDL or both.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
+ */
+
+#ifndef VBOX_INCLUDED_vmm_pdmasynctask_h
+#define VBOX_INCLUDED_vmm_pdmasynctask_h
+#ifndef RT_WITHOUT_PRAGMA_ONCE
+# pragma once
+#endif
+
+#include <VBox/types.h>
+
+
+RT_C_DECLS_BEGIN
+
+/** @defgroup grp_pdm_async_task    The PDM Async Task API
+ * @ingroup grp_pdm
+ * @{
+ */
+
+/** Pointer to a PDM async task template handle. */
+typedef struct PDMASYNCTASKTEMPLATE *PPDMASYNCTASKTEMPLATE;
+/** Pointer to a PDM async task template handle pointer. */
+typedef PPDMASYNCTASKTEMPLATE *PPPDMASYNCTASKTEMPLATE;
+
+/** Pointer to a PDM async task handle. */
+typedef struct PDMASYNCTASK *PPDMASYNCTASK;
+/** Pointer to a PDM async task handle pointer. */
+typedef PPDMASYNCTASK *PPPDMASYNCTASK;
+
+/* This should be similar to VMReq, only difference there will be a pool
+   of worker threads instead of EMT. The actual implementation should be
+   made in IPRT so we can reuse it for other stuff later. The reason why
+   it should be put in PDM is because we need to manage it wrt to VM
+   state changes (need exception - add a flag for this). */
+
+/** @} */
+
+
+RT_C_DECLS_END
+
+#endif /* !VBOX_INCLUDED_vmm_pdmasynctask_h */
+