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diff --git a/src/VBox/Devices/Bus/DevIommuAmd.h b/src/VBox/Devices/Bus/DevIommuAmd.h
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+++ b/src/VBox/Devices/Bus/DevIommuAmd.h
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+/* $Id: DevIommuAmd.h $ */
+/** @file
+ * DevIommuAmd - I/O Memory Management Unit (AMD), header shared with the IOMMU, ACPI, chipset/firmware code.
+ */
+
+/*
+ * Copyright (C) 2020-2022 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>.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+#ifndef VBOX_INCLUDED_SRC_Bus_DevIommuAmd_h
+#define VBOX_INCLUDED_SRC_Bus_DevIommuAmd_h
+#ifndef RT_WITHOUT_PRAGMA_ONCE
+# pragma once
+#endif
+
+/** AMD's vendor ID. */
+#define IOMMU_PCI_VENDOR_ID                         0x1022
+/** VirtualBox IOMMU device ID. */
+#define IOMMU_PCI_DEVICE_ID                         0xc0de
+/** VirtualBox IOMMU device revision ID. */
+#define IOMMU_PCI_REVISION_ID                       0x01
+/** The MMIO base address of the IOMMU (taken from real hardware). */
+#define IOMMU_MMIO_BASE_ADDR                        0xfeb80000
+/** Size of the MMIO region in bytes. */
+#define IOMMU_MMIO_REGION_SIZE                      _16K
+/** Number of device table segments supported (power of 2). */
+#define IOMMU_MAX_DEV_TAB_SEGMENTS                  3
+/** Maximum host address translation level supported (inclusive). NOTE! If you
+ *  change this make sure to change the value in ACPI tables (DevACPI.cpp) */
+#define IOMMU_MAX_HOST_PT_LEVEL                     6
+/** The device-specific feature major revision. */
+#define IOMMU_DEVSPEC_FEAT_MAJOR_VERSION            0x1
+/** The device-specific feature minor revision. */
+#define IOMMU_DEVSPEC_FEAT_MINOR_VERSION            0x0
+/** The device-specific control major revision. */
+#define IOMMU_DEVSPEC_CTRL_MAJOR_VERSION            0x1
+/** The device-specific control minor revision. */
+#define IOMMU_DEVSPEC_CTRL_MINOR_VERSION            0x0
+/** The device-specific status major revision. */
+#define IOMMU_DEVSPEC_STATUS_MAJOR_VERSION          0x1
+/** The device-specific status minor revision. */
+#define IOMMU_DEVSPEC_STATUS_MINOR_VERSION          0x0
+
+#endif /* !VBOX_INCLUDED_SRC_Bus_DevIommuAmd_h */