Index: /trunk/include/VBox/iommu-amd.h
===================================================================
--- /trunk/include/VBox/iommu-amd.h	(revision 85912)
+++ /trunk/include/VBox/iommu-amd.h	(revision 85912)
@@ -0,0 +1,2566 @@
+/** @file
+ * IOMMU - Input/Output Memory Management Unit (AMD).
+ */
+
+/*
+ * Copyright (C) 2020 Oracle Corporation
+ *
+ * This file is part of VirtualBox Open Source Edition (OSE), as
+ * available from http://www.virtualbox.org. This file is free software;
+ * you can redistribute it and/or modify it under the terms of the GNU
+ * General Public License (GPL) as published by the Free Software
+ * Foundation, in version 2 as it comes in the "COPYING" file of the
+ * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
+ * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
+ * VirtualBox OSE 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.
+ */
+
+#ifndef VBOX_INCLUDED_iommu_amd_h
+#define VBOX_INCLUDED_iommu_amd_h
+#ifndef RT_WITHOUT_PRAGMA_ONCE
+# pragma once
+#endif
+
+#include <iprt/assertcompile.h>
+#include <iprt/stdint.h>
+
+/**
+ * @name PCI configuration register offsets.
+ * In accordance with the AMD spec.
+ * @{
+ */
+#define IOMMU_PCI_OFF_CAP_HDR                       0x40
+#define IOMMU_PCI_OFF_BASE_ADDR_REG_LO              0x44
+#define IOMMU_PCI_OFF_BASE_ADDR_REG_HI              0x48
+#define IOMMU_PCI_OFF_RANGE_REG                     0x4c
+#define IOMMU_PCI_OFF_MISCINFO_REG_0                0x50
+#define IOMMU_PCI_OFF_MISCINFO_REG_1                0x54
+#define IOMMU_PCI_OFF_MSI_CAP_HDR                   0x64
+#define IOMMU_PCI_OFF_MSI_ADDR_LO                   0x68
+#define IOMMU_PCI_OFF_MSI_ADDR_HI                   0x6c
+#define IOMMU_PCI_OFF_MSI_DATA                      0x70
+#define IOMMU_PCI_OFF_MSI_MAP_CAP_HDR               0x74
+/** @} */
+
+/**
+ * @name MMIO register offsets.
+ * In accordance with the AMD spec.
+ * @{
+ */
+#define IOMMU_MMIO_OFF_DEV_TAB_BAR                  0x00
+#define IOMMU_MMIO_OFF_CMD_BUF_BAR                  0x08
+#define IOMMU_MMIO_OFF_EVT_LOG_BAR                  0x10
+#define IOMMU_MMIO_OFF_CTRL                         0x18
+#define IOMMU_MMIO_OFF_EXCL_BAR                     0x20
+#define IOMMU_MMIO_OFF_EXCL_RANGE_LIMIT             0x28
+#define IOMMU_MMIO_OFF_EXT_FEAT                     0x30
+
+#define IOMMU_MMIO_OFF_PPR_LOG_BAR                  0x38
+#define IOMMU_MMIO_OFF_HW_EVT_HI                    0x40
+#define IOMMU_MMIO_OFF_HW_EVT_LO                    0x48
+#define IOMMU_MMIO_OFF_HW_EVT_STATUS                0x50
+
+#define IOMMU_MMIO_OFF_SMI_FLT_FIRST                0x60
+#define IOMMU_MMIO_OFF_SMI_FLT_LAST                 0xd8
+
+#define IOMMU_MMIO_OFF_GALOG_BAR                    0xe0
+#define IOMMU_MMIO_OFF_GALOG_TAIL_ADDR              0xe8
+
+#define IOMMU_MMIO_OFF_PPR_LOG_B_BAR                0xf0
+#define IOMMU_MMIO_OFF_PPR_EVT_B_BAR                0xf8
+
+#define IOMMU_MMIO_OFF_DEV_TAB_SEG_FIRST            0x100
+#define IOMMU_MMIO_OFF_DEV_TAB_SEG_1                0x100
+#define IOMMU_MMIO_OFF_DEV_TAB_SEG_2                0x108
+#define IOMMU_MMIO_OFF_DEV_TAB_SEG_3                0x110
+#define IOMMU_MMIO_OFF_DEV_TAB_SEG_4                0x118
+#define IOMMU_MMIO_OFF_DEV_TAB_SEG_5                0x120
+#define IOMMU_MMIO_OFF_DEV_TAB_SEG_6                0x128
+#define IOMMU_MMIO_OFF_DEV_TAB_SEG_7                0x130
+#define IOMMU_MMIO_OFF_DEV_TAB_SEG_LAST             0x130
+
+#define IOMMU_MMIO_OFF_DEV_SPECIFIC_FEAT            0x138
+#define IOMMU_MMIO_OFF_DEV_SPECIFIC_CTRL            0x140
+#define IOMMU_MMIO_OFF_DEV_SPECIFIC_STATUS          0x148
+
+#define IOMMU_MMIO_OFF_MSI_VECTOR_0                 0x150
+#define IOMMU_MMIO_OFF_MSI_VECTOR_1                 0x154
+#define IOMMU_MMIO_OFF_MSI_CAP_HDR                  0x158
+#define IOMMU_MMIO_OFF_MSI_ADDR_LO                  0x15c
+#define IOMMU_MMIO_OFF_MSI_ADDR_HI                  0x160
+#define IOMMU_MMIO_OFF_MSI_DATA                     0x164
+#define IOMMU_MMIO_OFF_MSI_MAPPING_CAP_HDR          0x168
+
+#define IOMMU_MMIO_OFF_PERF_OPT_CTRL                0x16c
+
+#define IOMMU_MMIO_OFF_XT_GEN_INTR_CTRL             0x170
+#define IOMMU_MMIO_OFF_XT_PPR_INTR_CTRL             0x178
+#define IOMMU_MMIO_OFF_XT_GALOG_INT_CTRL            0x180
+
+#define IOMMU_MMIO_OFF_MARC_APER_BAR_0              0x200
+#define IOMMU_MMIO_OFF_MARC_APER_RELOC_0            0x208
+#define IOMMU_MMIO_OFF_MARC_APER_LEN_0              0x210
+#define IOMMU_MMIO_OFF_MARC_APER_BAR_1              0x218
+#define IOMMU_MMIO_OFF_MARC_APER_RELOC_1            0x220
+#define IOMMU_MMIO_OFF_MARC_APER_LEN_1              0x228
+#define IOMMU_MMIO_OFF_MARC_APER_BAR_2              0x230
+#define IOMMU_MMIO_OFF_MARC_APER_RELOC_2            0x238
+#define IOMMU_MMIO_OFF_MARC_APER_LEN_2              0x240
+#define IOMMU_MMIO_OFF_MARC_APER_BAR_3              0x248
+#define IOMMU_MMIO_OFF_MARC_APER_RELOC_3            0x250
+#define IOMMU_MMIO_OFF_MARC_APER_LEN_3              0x258
+
+#define IOMMU_MMIO_OFF_RSVD_REG                     0x1ff8
+
+#define IOMMU_MMIO_CMD_BUF_HEAD_PTR                 0x2000
+#define IOMMU_MMIO_CMD_BUF_TAIL_PTR                 0x2008
+#define IOMMU_MMIO_EVT_LOG_HEAD_PTR                 0x2010
+#define IOMMU_MMIO_EVT_LOG_TAIL_PTR                 0x2018
+
+#define IOMMU_MMIO_OFF_STATUS                       0x2020
+
+#define IOMMU_MMIO_OFF_PPR_LOG_HEAD_PTR             0x2030
+#define IOMMU_MMIO_OFF_PPR_LOG_TAIL_PTR             0x2038
+
+#define IOMMU_MMIO_OFF_GALOG_HEAD_PTR               0x2040
+#define IOMMU_MMIO_OFF_GALOG_TAIL_PTR               0x2048
+
+#define IOMMU_MMIO_OFF_PPR_LOG_B_HEAD_PTR           0x2050
+#define IOMMU_MMIO_OFF_PPR_LOG_B_TAIL_PTR           0x2058
+
+#define IOMMU_MMIO_OFF_EVT_LOG_B_HEAD_PTR           0x2070
+#define IOMMU_MMIO_OFF_EVT_LOG_B_TAIL_PTR           0x2078
+
+#define IOMMU_MMIO_OFF_PPR_LOG_AUTO_RESP            0x2080
+#define IOMMU_MMIO_OFF_PPR_LOG_OVERFLOW_EARLY       0x2088
+#define IOMMU_MMIO_OFF_PPR_LOG_B_OVERFLOW_EARLY     0x2090
+/** @} */
+
+/**
+ * @name MMIO register-access table offsets.
+ * Each table [first..last] (both inclusive) represents the range of registers
+ * covered by a distinct register-access table. This is done due to arbitrary large
+ * gaps in the MMIO register offsets themselves.
+ * @{
+ */
+#define IOMMU_MMIO_OFF_TABLE_0_FIRST               0x00
+#define IOMMU_MMIO_OFF_TABLE_0_LAST                0x258
+
+#define IOMMU_MMIO_OFF_TABLE_1_FIRST               0x1ff8
+#define IOMMU_MMIO_OFF_TABLE_1_LAST                0x2090
+/** @} */
+
+/**
+ * @name Commands.
+ * In accordance with the AMD spec.
+ * @{
+ */
+#define IOMMU_CMD_COMPLETION_WAIT                   0x01
+#define IOMMU_CMD_INV_DEV_TAB_ENTRY                 0x02
+#define IOMMU_CMD_INV_IOMMU_PAGES                   0x03
+#define IOMMU_CMD_INV_IOTLB_PAGES                   0x04
+#define IOMMU_CMD_INV_INTR_TABLE                    0x05
+#define IOMMU_CMD_PREFETCH_IOMMU_PAGES              0x06
+#define IOMMU_CMD_COMPLETE_PPR_REQ                  0x07
+#define IOMMU_CMD_INV_IOMMU_ALL                     0x08
+/** @} */
+
+/**
+ * @name Event codes.
+ * In accordance with the AMD spec.
+ * @{
+ */
+#define IOMMU_EVT_ILLEGAL_DEV_TAB_ENTRY             0x01
+#define IOMMU_EVT_IO_PAGE_FAULT                     0x02
+#define IOMMU_EVT_DEV_TAB_HW_ERROR                  0x03
+#define IOMMU_EVT_PAGE_TAB_HW_ERROR                 0x04
+#define IOMMU_EVT_ILLEGAL_CMD_ERROR                 0x05
+#define IOMMU_EVT_COMMAND_HW_ERROR                  0x06
+#define IOMMU_EVT_IOTLB_INV_TIMEOUT                 0x07
+#define IOMMU_EVT_INVALID_DEV_REQ                   0x08
+#define IOMMU_EVT_INVALID_PPR_REQ                   0x09
+#define IOMMU_EVT_EVENT_COUNTER_ZERO                0x10
+#define IOMMU_EVT_GUEST_EVENT_FAULT                 0x11
+/** @} */
+
+/**
+ * @name IOMMU Capability Header.
+ * In accordance with the AMD spec.
+ * @{
+ */
+/** CapId: Capability ID. */
+#define IOMMU_BF_CAPHDR_CAP_ID_SHIFT                0
+#define IOMMU_BF_CAPHDR_CAP_ID_MASK                 UINT32_C(0x000000ff)
+/** CapPtr: Capability Pointer. */
+#define IOMMU_BF_CAPHDR_CAP_PTR_SHIFT               8
+#define IOMMU_BF_CAPHDR_CAP_PTR_MASK                UINT32_C(0x0000ff00)
+/** CapType: Capability Type. */
+#define IOMMU_BF_CAPHDR_CAP_TYPE_SHIFT              16
+#define IOMMU_BF_CAPHDR_CAP_TYPE_MASK               UINT32_C(0x00070000)
+/** CapRev: Capability Revision. */
+#define IOMMU_BF_CAPHDR_CAP_REV_SHIFT               19
+#define IOMMU_BF_CAPHDR_CAP_REV_MASK                UINT32_C(0x00f80000)
+/** IoTlbSup: IO TLB Support. */
+#define IOMMU_BF_CAPHDR_IOTLB_SUP_SHIFT             24
+#define IOMMU_BF_CAPHDR_IOTLB_SUP_MASK              UINT32_C(0x01000000)
+/** HtTunnel: HyperTransport Tunnel translation support. */
+#define IOMMU_BF_CAPHDR_HT_TUNNEL_SHIFT             25
+#define IOMMU_BF_CAPHDR_HT_TUNNEL_MASK              UINT32_C(0x02000000)
+/** NpCache: Not Present table entries Cached. */
+#define IOMMU_BF_CAPHDR_NP_CACHE_SHIFT              26
+#define IOMMU_BF_CAPHDR_NP_CACHE_MASK               UINT32_C(0x04000000)
+/** EFRSup: Extended Feature Register (EFR) Supported. */
+#define IOMMU_BF_CAPHDR_EFR_SUP_SHIFT               27
+#define IOMMU_BF_CAPHDR_EFR_SUP_MASK                UINT32_C(0x08000000)
+/** CapExt: Miscellaneous Information Register Supported . */
+#define IOMMU_BF_CAPHDR_CAP_EXT_SHIFT               28
+#define IOMMU_BF_CAPHDR_CAP_EXT_MASK                UINT32_C(0x10000000)
+/** Bits 31:29 reserved. */
+#define IOMMU_BF_CAPHDR_RSVD_29_31_SHIFT            29
+#define IOMMU_BF_CAPHDR_RSVD_29_31_MASK             UINT32_C(0xe0000000)
+RT_BF_ASSERT_COMPILE_CHECKS(IOMMU_BF_CAPHDR_, UINT32_C(0), UINT32_MAX,
+                            (CAP_ID, CAP_PTR, CAP_TYPE, CAP_REV, IOTLB_SUP, HT_TUNNEL, NP_CACHE, EFR_SUP, CAP_EXT, RSVD_29_31));
+/** @} */
+
+/**
+ * @name IOMMU Base Address Low Register.
+ * In accordance with the AMD spec.
+ * @{
+ */
+/** Enable: Enables access to the address specified in the Base Address Register. */
+#define IOMMU_BF_BASEADDR_LO_ENABLE_SHIFT           0
+#define IOMMU_BF_BASEADDR_LO_ENABLE_MASK            UINT32_C(0x00000001)
+/** Bits 13:1 reserved. */
+#define IOMMU_BF_BASEADDR_LO_RSVD_1_13_SHIFT        1
+#define IOMMU_BF_BASEADDR_LO_RSVD_1_13_MASK         UINT32_C(0x00003ffe)
+/** Base Address[31:14]: Low Base address of IOMMU MMIO control registers. */
+#define IOMMU_BF_BASEADDR_LO_ADDR_SHIFT             14
+#define IOMMU_BF_BASEADDR_LO_ADDR_MASK              UINT32_C(0xffffc000)
+RT_BF_ASSERT_COMPILE_CHECKS(IOMMU_BF_BASEADDR_LO_, UINT32_C(0), UINT32_MAX,
+                            (ENABLE, RSVD_1_13, ADDR));
+/** @} */
+
+/**
+ * @name IOMMU Range Register.
+ * In accordance with the AMD spec.
+ * @{
+ */
+/** UnitID: HyperTransport Unit ID. */
+#define IOMMU_BF_RANGE_UNIT_ID_SHIFT                0
+#define IOMMU_BF_RANGE_UNIT_ID_MASK                 UINT32_C(0x0000001f)
+/** Bits 6:5 reserved. */
+#define IOMMU_BF_RANGE_RSVD_5_6_SHIFT               5
+#define IOMMU_BF_RANGE_RSVD_5_6_MASK                UINT32_C(0x00000060)
+/** RngValid: Range valid. */
+#define IOMMU_BF_RANGE_VALID_SHIFT                  7
+#define IOMMU_BF_RANGE_VALID_MASK                   UINT32_C(0x00000080)
+/** BusNumber: Device range bus number. */
+#define IOMMU_BF_RANGE_BUS_NUMBER_SHIFT             8
+#define IOMMU_BF_RANGE_BUS_NUMBER_MASK              UINT32_C(0x0000ff00)
+/** First Device. */
+#define IOMMU_BF_RANGE_FIRST_DEVICE_SHIFT           16
+#define IOMMU_BF_RANGE_FIRST_DEVICE_MASK            UINT32_C(0x00ff0000)
+/** Last Device. */
+#define IOMMU_BF_RANGE_LAST_DEVICE_SHIFT            24
+#define IOMMU_BF_RANGE_LAST_DEVICE_MASK             UINT32_C(0xff000000)
+RT_BF_ASSERT_COMPILE_CHECKS(IOMMU_BF_RANGE_, UINT32_C(0), UINT32_MAX,
+                            (UNIT_ID, RSVD_5_6, VALID, BUS_NUMBER, FIRST_DEVICE, LAST_DEVICE));
+/** @} */
+
+/**
+ * @name IOMMU Miscellaneous Information Register 0.
+ * In accordance with the AMD spec.
+ * @{
+ */
+/** MsiNum: MSI message number. */
+#define IOMMU_BF_MISCINFO_0_MSI_NUM_SHIFT           0
+#define IOMMU_BF_MISCINFO_0_MSI_NUM_MASK            UINT32_C(0x0000001f)
+/** GvaSize: Guest Virtual Address Size. */
+#define IOMMU_BF_MISCINFO_0_GVA_SIZE_SHIFT          5
+#define IOMMU_BF_MISCINFO_0_GVA_SIZE_MASK           UINT32_C(0x000000e0)
+/** PaSize: Physical Address Size. */
+#define IOMMU_BF_MISCINFO_0_PA_SIZE_SHIFT           8
+#define IOMMU_BF_MISCINFO_0_PA_SIZE_MASK            UINT32_C(0x00007f00)
+/** VaSize: Virtual Address Size. */
+#define IOMMU_BF_MISCINFO_0_VA_SIZE_SHIFT           15
+#define IOMMU_BF_MISCINFO_0_VA_SIZE_MASK            UINT32_C(0x003f8000)
+/** HtAtsResv: HyperTransport ATS Response Address range Reserved. */
+#define IOMMU_BF_MISCINFO_0_HT_ATS_RESV_SHIFT       22
+#define IOMMU_BF_MISCINFO_0_HT_ATS_RESV_MASK        UINT32_C(0x00400000)
+/** Bits 26:23 reserved. */
+#define IOMMU_BF_MISCINFO_0_RSVD_23_26_SHIFT        23
+#define IOMMU_BF_MISCINFO_0_RSVD_23_26_MASK         UINT32_C(0x07800000)
+/** MsiNumPPR: Peripheral Page Request MSI message number. */
+#define IOMMU_BF_MISCINFO_0_MSI_NUM_PPR_SHIFT       27
+#define IOMMU_BF_MISCINFO_0_MSI_NUM_PPR_MASK        UINT32_C(0xf8000000)
+RT_BF_ASSERT_COMPILE_CHECKS(IOMMU_BF_MISCINFO_0_, UINT32_C(0), UINT32_MAX,
+                            (MSI_NUM, GVA_SIZE, PA_SIZE, VA_SIZE, HT_ATS_RESV, RSVD_23_26, MSI_NUM_PPR));
+/** @} */
+
+/**
+ * @name IOMMU Miscellaneous Information Register 1.
+ * In accordance with the AMD spec.
+ * @{
+ */
+/** MsiNumGA: MSI message number for guest virtual-APIC log. */
+#define IOMMU_BF_MISCINFO_1_MSI_NUM_GA_SHIFT        0
+#define IOMMU_BF_MISCINFO_1_MSI_NUM_GA_MASK         UINT32_C(0x0000001f)
+/** Bits 31:5 reserved. */
+#define IOMMU_BF_MISCINFO_1_RSVD_5_31_SHIFT         5
+#define IOMMU_BF_MISCINFO_1_RSVD_5_31_MASK          UINT32_C(0xffffffe0)
+RT_BF_ASSERT_COMPILE_CHECKS(IOMMU_BF_MISCINFO_1_, UINT32_C(0), UINT32_MAX,
+                            (MSI_NUM_GA, RSVD_5_31));
+/** @} */
+
+/**
+ * @name MSI Capability Header Register.
+ * In accordance with the AMD spec.
+ * @{
+ */
+/** MsiCapId: Capability ID. */
+#define IOMMU_BF_MSI_CAP_HDR_CAP_ID_SHIFT           0
+#define IOMMU_BF_MSI_CAP_HDR_CAP_ID_MASK            UINT32_C(0x000000ff)
+/** MsiCapPtr: Pointer (PCI config offset) to the next capability. */
+#define IOMMU_BF_MSI_CAP_HDR_CAP_PTR_SHIFT          8
+#define IOMMU_BF_MSI_CAP_HDR_CAP_PTR_MASK           UINT32_C(0x0000ff00)
+/** MsiEn: Message Signal Interrupt enable. */
+#define IOMMU_BF_MSI_CAP_HDR_EN_SHIFT               16
+#define IOMMU_BF_MSI_CAP_HDR_EN_MASK                UINT32_C(0x00010000)
+/** MsiMultMessCap: MSI Multi-Message Capability. */
+#define IOMMU_BF_MSI_CAP_HDR_MULTMESS_CAP_SHIFT     17
+#define IOMMU_BF_MSI_CAP_HDR_MULTMESS_CAP_MASK      UINT32_C(0x000e0000)
+/** MsiMultMessEn: MSI Mult-Message Enable. */
+#define IOMMU_BF_MSI_CAP_HDR_MULTMESS_EN_SHIFT      20
+#define IOMMU_BF_MSI_CAP_HDR_MULTMESS_EN_MASK       UINT32_C(0x00700000)
+/** Msi64BitEn: MSI 64-bit Enabled. */
+#define IOMMU_BF_MSI_CAP_HDR_64BIT_EN_SHIFT         23
+#define IOMMU_BF_MSI_CAP_HDR_64BIT_EN_MASK          UINT32_C(0x00800000)
+/** Bits 31:24 reserved. */
+#define IOMMU_BF_MSI_CAP_HDR_RSVD_24_31_SHIFT       24
+#define IOMMU_BF_MSI_CAP_HDR_RSVD_24_31_MASK        UINT32_C(0xff000000)
+RT_BF_ASSERT_COMPILE_CHECKS(IOMMU_BF_MSI_CAP_HDR_, UINT32_C(0), UINT32_MAX,
+                            (CAP_ID, CAP_PTR, EN, MULTMESS_CAP, MULTMESS_EN, 64BIT_EN, RSVD_24_31));
+/** @} */
+
+/**
+ * @name MSI Mapping Capability Header Register.
+ * In accordance with the AMD spec.
+ * @{
+ */
+/** MsiMapCapId: Capability ID. */
+#define IOMMU_BF_MSI_MAP_CAPHDR_CAP_ID_SHIFT        0
+#define IOMMU_BF_MSI_MAP_CAPHDR_CAP_ID_MASK         UINT32_C(0x000000ff)
+/** MsiMapCapPtr: Pointer (PCI config offset) to the next capability. */
+#define IOMMU_BF_MSI_MAP_CAPHDR_CAP_PTR_SHIFT       8
+#define IOMMU_BF_MSI_MAP_CAPHDR_CAP_PTR_MASK        UINT32_C(0x0000ff00)
+/** MsiMapEn: MSI mapping capability enable. */
+#define IOMMU_BF_MSI_MAP_CAPHDR_EN_SHIFT            16
+#define IOMMU_BF_MSI_MAP_CAPHDR_EN_MASK             UINT32_C(0x00010000)
+/** MsiMapFixd: MSI interrupt mapping range is not programmable. */
+#define IOMMU_BF_MSI_MAP_CAPHDR_FIXED_SHIFT         17
+#define IOMMU_BF_MSI_MAP_CAPHDR_FIXED_MASK          UINT32_C(0x00020000)
+/** Bits 18:28 reserved. */
+#define IOMMU_BF_MSI_MAP_CAPHDR_RSVD_18_28_SHIFT    18
+#define IOMMU_BF_MSI_MAP_CAPHDR_RSVD_18_28_MASK     UINT32_C(0x07fc0000)
+/** MsiMapCapType: MSI mapping capability. */
+#define IOMMU_BF_MSI_MAP_CAPHDR_CAP_TYPE_SHIFT      27
+#define IOMMU_BF_MSI_MAP_CAPHDR_CAP_TYPE_MASK       UINT32_C(0xf8000000)
+RT_BF_ASSERT_COMPILE_CHECKS(IOMMU_BF_MSI_MAP_CAPHDR_, UINT32_C(0), UINT32_MAX,
+                            (CAP_ID, CAP_PTR, EN, FIXED, RSVD_18_28, CAP_TYPE));
+/** @} */
+
+/**
+ * @name IOMMU Status Register Bits.
+ * In accordance with the AMD spec.
+ * @{
+ */
+/** EventOverflow: Event log overflow. */
+#define IOMMU_STATUS_EVT_LOG_OVERFLOW               RT_BIT_64(0)
+/** EventLogInt: Event log interrupt. */
+#define IOMMU_STATUS_EVT_LOG_INTR                   RT_BIT_64(1)
+/** ComWaitInt: Completion wait interrupt. */
+#define IOMMU_STATUS_COMPLETION_WAIT_INTR           RT_BIT_64(2)
+/** EventLogRun: Event log is running. */
+#define IOMMU_STATUS_EVT_LOG_RUNNING                RT_BIT_64(3)
+/** CmdBufRun: Command buffer is running. */
+#define IOMMU_STATUS_CMD_BUF_RUNNING                RT_BIT_64(4)
+/** PprOverflow: Peripheral page request log overflow. */
+#define IOMMU_STATUS_PPR_LOG_OVERFLOW               RT_BIT_64(5)
+/** PprInt: Peripheral page request log interrupt. */
+#define IOMMU_STATUS_PPR_LOG_INTR                   RT_BIT_64(6)
+/** PprLogRun: Peripheral page request log is running. */
+#define IOMMU_STATUS_PPR_LOG_RUN                    RT_BIT_64(7)
+/** GALogRun: Guest virtual-APIC log is running. */
+#define IOMMU_STATUS_GA_LOG_RUN                     RT_BIT_64(8)
+/** GALOverflow: Guest virtual-APIC log overflow. */
+#define IOMMU_STATUS_GA_LOG_OVERFLOW                RT_BIT_64(9)
+/** GAInt: Guest virtual-APIC log interrupt. */
+#define IOMMU_STATUS_GA_LOG_INTR                    RT_BIT_64(10)
+/** PprOvrflwB: PPR Log B overflow. */
+#define IOMMU_STATUS_PPR_LOG_B_OVERFLOW             RT_BIT_64(11)
+/** PprLogActive: PPR Log B is active. */
+#define IOMMU_STATUS_PPR_LOG_B_ACTIVE               RT_BIT_64(12)
+/** EvtOvrflwB: Event log B overflow. */
+#define IOMMU_STATUS_EVT_LOG_B_OVERFLOW             RT_BIT_64(15)
+/** EventLogActive: Event log B active. */
+#define IOMMU_STATUS_EVT_LOG_B_ACTIVE               RT_BIT_64(16)
+/** PprOvrflwEarlyB: PPR log B overflow early warning. */
+#define IOMMU_STATUS_PPR_LOG_B_OVERFLOW_EARLY       RT_BIT_64(17)
+/** PprOverflowEarly: PPR log overflow early warning. */
+#define IOMMU_STATUS_PPR_LOG_OVERFLOW_EARLY         RT_BIT_64(18)
+/** @} */
+
+/** @name IOMMU_IO_PERM_XXX: IOMMU I/O access permissions bits.
+ * In accordance with the AMD spec.
+ *
+ * These values match the shifted values of the IR and IW field of the DTE and the
+ * PTE, PDE of the I/O page tables.
+ *
+ * @{ */
+#define IOMMU_IO_PERM_NONE                          (0)
+#define IOMMU_IO_PERM_READ                          RT_BIT_64(0)
+#define IOMMU_IO_PERM_WRITE                         RT_BIT_64(1)
+#define IOMMU_IO_PERM_READ_WRITE                    (IOMMU_IO_PERM_READ | IOMMU_IO_PERM_WRITE)
+#define IOMMU_IO_PERM_SHIFT                         61
+#define IOMMU_IO_PERM_MASK                          0x3
+/** @} */
+
+/** @name SYSMGT_TYPE_XXX: System Management Message Enable Types.
+ * In accordance with the AMD spec.
+ * @{ */
+#define SYSMGTTYPE_DMA_DENY                         (0)
+#define SYSMGTTYPE_MSG_ALL_ALLOW                    (1)
+#define SYSMGTTYPE_MSG_INT_ALLOW                    (2)
+#define SYSMGTTYPE_DMA_ALLOW                        (3)
+/** @} */
+
+/** @name IOMMU_INTR_CTRL_XX: DTE::IntCtl field values.
+ * These are control bits for handling fixed and arbitrated interrupts.
+ * In accordance with the AMD spec.
+ * @{ */
+#define IOMMU_INTR_CTRL_TARGET_ABORT                (0)
+#define IOMMU_INTR_CTRL_FWD_UNMAPPED                (1)
+#define IOMMU_INTR_CTRL_REMAP                       (2)
+#define IOMMU_INTR_CTRL_RSVD                        (3)
+/** @} */
+
+/**
+ * Gets the device table size given the size field.
+ */
+#define IOMMU_GET_DEV_TAB_SIZE(a_uSize)     (((a_uSize) + 1) << X86_PAGE_4K_SHIFT)
+
+/**
+ * The Device ID.
+ * In accordance with VirtualBox's PCI configuration.
+ */
+typedef union
+{
+    struct
+    {
+        uint16_t    u3Function : 3;  /**< Bits 2:0   - Function. */
+        uint16_t    u9Device : 9;    /**< Bits 11:3  - Device. */
+        uint16_t    u4Bus : 4;       /**< Bits 15:12 - Bus. */
+    } n;
+    /** The unsigned integer view. */
+    uint16_t        u;
+} DEVICE_ID_T;
+AssertCompileSize(DEVICE_ID_T, 2);
+
+/**
+ * Device Table Entry (DTE).
+ * In accordance with the AMD spec.
+ */
+typedef union
+{
+    struct
+    {
+        RT_GCC_EXTENSION uint64_t  u1Valid : 1;                   /**< Bit  0       - V: Valid. */
+        RT_GCC_EXTENSION uint64_t  u1TranslationValid : 1;        /**< Bit  1       - TV: Translation information Valid. */
+        RT_GCC_EXTENSION uint64_t  u5Rsvd0 : 5;                   /**< Bits 6:2     - Reserved. */
+        RT_GCC_EXTENSION uint64_t  u2Had : 2;                     /**< Bits 8:7     - HAD: Host Access Dirty. */
+        RT_GCC_EXTENSION uint64_t  u3Mode : 3;                    /**< Bits 11:9    - Mode: Paging mode. */
+        RT_GCC_EXTENSION uint64_t  u40PageTableRootPtrLo : 40;    /**< Bits 51:12   - Page Table Root Pointer. */
+        RT_GCC_EXTENSION uint64_t  u1Ppr : 1;                     /**< Bit  52      - PPR: Peripheral Page Request. */
+        RT_GCC_EXTENSION uint64_t  u1GstPprRespPasid : 1;         /**< Bit  53      - GRPR: Guest PPR Response with PASID. */
+        RT_GCC_EXTENSION uint64_t  u1GstIoValid : 1;              /**< Bit  54      - GIoV: Guest I/O Protection Valid. */
+        RT_GCC_EXTENSION uint64_t  u1GstTranslateValid : 1;       /**< Bit  55      - GV: Guest translation Valid. */
+        RT_GCC_EXTENSION uint64_t  u2GstMode : 2;                 /**< Bits 57:56   - GLX: Guest Paging mode levels. */
+        RT_GCC_EXTENSION uint64_t  u3GstCr3TableRootPtrLo : 2;    /**< Bits 60:58   - GCR3 TRP: Guest CR3 Table Root Ptr (Lo). */
+        RT_GCC_EXTENSION uint64_t  u1IoRead : 1;                  /**< Bit  61      - IR: I/O Read permission. */
+        RT_GCC_EXTENSION uint64_t  u1IoWrite : 1;                 /**< Bit  62      - IW: I/O Write permission. */
+        RT_GCC_EXTENSION uint64_t  u1Rsvd0 : 1;                   /**< Bit  63      - Reserved. */
+        RT_GCC_EXTENSION uint64_t  u16DomainId : 1;               /**< Bits 79:64   - Domain ID. */
+        RT_GCC_EXTENSION uint64_t  u16GstCr3TableRootPtrMed : 16; /**< Bits 95:80   - GCR3 TRP: Guest CR3 Table Root Ptr (Mid). */
+        RT_GCC_EXTENSION uint64_t  u1IoTlbEnable : 1;             /**< Bit  96      - I: IOTLB Enable. */
+        RT_GCC_EXTENSION uint64_t  u1SuppressPfEvents : 1;        /**< Bit  97      - SE: Supress Page-fault events. */
+        RT_GCC_EXTENSION uint64_t  u1SuppressAllPfEvents : 1;     /**< Bit  98      - SA: Supress All Page-fault events. */
+        RT_GCC_EXTENSION uint64_t  u2IoCtl : 1;                   /**< Bits 100:99  - IoCtl: Port I/O Control. */
+        RT_GCC_EXTENSION uint64_t  u1Cache : 1;                   /**< Bit  101     - Cache: IOTLB Cache Hint. */
+        RT_GCC_EXTENSION uint64_t  u1SnoopDisable : 1;            /**< Bit  102     - SD: Snoop Disable. */
+        RT_GCC_EXTENSION uint64_t  u1AllowExclusion : 1;          /**< Bit  103     - EX: Allow Exclusion. */
+        RT_GCC_EXTENSION uint64_t  u2SysMgt : 2;                  /**< Bits 105:104 - SysMgt: System Management message enable. */
+        RT_GCC_EXTENSION uint64_t  u1Rsvd1 : 1;                   /**< Bit  106     - Reserved. */
+        RT_GCC_EXTENSION uint64_t  u21GstCr3TableRootPtrHi : 21;  /**< Bits 127:107 - GCR3 TRP: Guest CR3 Table Root Ptr (Hi). */
+        RT_GCC_EXTENSION uint64_t  u1IntrMapValid : 1;            /**< Bit  128     - IV: Interrupt map Valid. */
+        RT_GCC_EXTENSION uint64_t  u4IntrTableLength : 4;         /**< Bits 132:129 - IntTabLen: Interrupt Table Length. */
+        RT_GCC_EXTENSION uint64_t  u1IgnoreUnmappedIntrs : 1;     /**< Bits 133     - IG: Ignore unmapped interrupts. */
+        RT_GCC_EXTENSION uint64_t  u26IntrTableRootPtr : 26;      /**< Bits 159:134 - Interrupt Root Table Pointer (Lo). */
+        RT_GCC_EXTENSION uint64_t  u20IntrTableRootPtr : 20;      /**< Bits 179:160 - Interrupt Root Table Pointer (Hi). */
+        RT_GCC_EXTENSION uint64_t  u4Rsvd0 : 4;                   /**< Bits 183:180 - Reserved. */
+        RT_GCC_EXTENSION uint64_t  u1InitPassthru : 1;            /**< Bits 184     - INIT Pass-through. */
+        RT_GCC_EXTENSION uint64_t  u1ExtIntPassthru : 1;          /**< Bits 185     - External Interrupt Pass-through. */
+        RT_GCC_EXTENSION uint64_t  u1NmiPassthru : 1;             /**< Bits 186     - NMI Pass-through. */
+        RT_GCC_EXTENSION uint64_t  u1Rsvd2 : 1;                   /**< Bits 187     - Reserved. */
+        RT_GCC_EXTENSION uint64_t  u2IntrCtrl : 2;                /**< Bits 189:188 - IntCtl: Interrupt Control. */
+        RT_GCC_EXTENSION uint64_t  u1Lint0Passthru : 1;           /**< Bit  190     - Lint0Pass: LINT0 Pass-through. */
+        RT_GCC_EXTENSION uint64_t  u1Lint1Passthru : 1;           /**< Bit  191     - Lint1Pass: LINT1 Pass-through. */
+        RT_GCC_EXTENSION uint64_t  u32Rsvd0 : 32;                 /**< Bits 223:192 - Reserved. */
+        RT_GCC_EXTENSION uint64_t  u22Rsvd0 : 22;                 /**< Bits 245:224 - Reserved. */
+        RT_GCC_EXTENSION uint64_t  u1AttrOverride : 1;            /**< Bit  246     - AttrV: Attribute Override. */
+        RT_GCC_EXTENSION uint64_t  u1Mode0FC: 1;                  /**< Bit  247     - Mode0FC. */
+        RT_GCC_EXTENSION uint64_t  u8SnoopAttr: 1;                /**< Bits 255:248 - Snoop Attribute. */
+    } n;
+    /** The 32-bit unsigned integer view. */
+    uint32_t        au32[8];
+    /** The 64-bit unsigned integer view. */
+    uint64_t        au64[4];
+} DTE_T;
+AssertCompileSize(DTE_T, 32);
+/** Pointer to a device table entry. */
+typedef DTE_T *PDTE_T;
+/** Pointer to a const device table entry. */
+typedef DTE_T const *PCDTE_T;
+
+/** Mask of valid  bits for EPHSUP (Enhanced Peripheral Page Request Handling
+ *  Support) feature (bits 52:53). */
+#define IOMMU_DTE_QWORD_0_FEAT_EPHSUP_MASK      UINT64_C(0x0030000000000000)
+
+/** Mask of valid bits for GTSup (Guest Translation Support) feature (bits 55:60,
+ *  bits 80:95). */
+#define IOMMU_DTE_QWORD_0_FEAT_GTSUP_MASK       UINT64_C(0x1f80000000000000)
+#define IOMMU_DTE_QWORD_1_FEAT_GTSUP_MASK       UINT64_C(0x00000000ffff0000)
+
+/* Mask of valid bits for GIoSup (Guest I/O Protection Support) feature (bit 54). */
+#define IOMMU_DTE_QWORD_0_FEAT_GIOSUP_MASK      UINT64_C(0x0040000000000000)
+
+/* Mask of valid DTE feature bits. */
+#define IOMMU_DTE_QWORD_0_FEAT_MASK             (  IOMMU_DTE_QWORD_0_FEAT_EPHSUP_MASK \
+                                                 | IOMMU_DTE_QWORD_0_FEAT_GTSUP_MASK  \
+                                                 | IOMMU_DTE_QWORD_0_FEAT_GIOSUP_MASK)
+#define IOMMU_DTE_QWORD_1_FEAT_MASK             (IOMMU_DTE_QWORD_0_FEAT_GIOSUP_MASK)
+
+/* Mask of all valid DTE bits (including all feature bits). */
+#define IOMMU_DTE_QWORD_0_VALID_MASK            UINT64_C(0x7fffffffffffff83)
+#define IOMMU_DTE_QWORD_1_VALID_MASK            UINT64_C(0xfffffbffffffffff)
+#define IOMMU_DTE_QWORD_2_VALID_MASK            UINT64_C(0xf70fffffffffffff)
+#define IOMMU_DTE_QWORD_3_VALID_MASK            UINT64_C(0xffc0000000000000)
+
+/* Mask of the interrupt table root pointer. */
+#define IOMMU_DTE_IRTE_ROOT_PTR_MASK            UINT64_C(0x000fffffffffff80)
+
+/**
+ * I/O Page Translation Entry.
+ * In accordance with the AMD spec.
+ */
+typedef union
+{
+    struct
+    {
+        RT_GCC_EXTENSION uint64_t    u1Present : 1;             /**< Bit  0      - PR: Present. */
+        RT_GCC_EXTENSION uint64_t    u4Ign0 : 4;                /**< Bits 4:1    - Ignored. */
+        RT_GCC_EXTENSION uint64_t    u1Accessed : 1;            /**< Bit  5      - A: Accessed. */
+        RT_GCC_EXTENSION uint64_t    u1Dirty : 1;               /**< Bit  6      - D: Dirty. */
+        RT_GCC_EXTENSION uint64_t    u2Ign0 : 2;                /**< Bits 8:7    - Ignored. */
+        RT_GCC_EXTENSION uint64_t    u3NextLevel : 3;           /**< Bits 11:9   - Next Level: Next page translation level. */
+        RT_GCC_EXTENSION uint64_t    u40PageAddr : 40;          /**< Bits 51:12  - Page address. */
+        RT_GCC_EXTENSION uint64_t    u7Rsvd0 : 7;               /**< Bits 58:52  - Reserved. */
+        RT_GCC_EXTENSION uint64_t    u1UntranslatedAccess : 1;  /**< Bit 59      - U: Untranslated Access Only. */
+        RT_GCC_EXTENSION uint64_t    u1ForceCoherent : 1;       /**< Bit 60      - FC: Force Coherent. */
+        RT_GCC_EXTENSION uint64_t    u1IoRead : 1;              /**< Bit 61      - IR: I/O Read permission. */
+        RT_GCC_EXTENSION uint64_t    u1IoWrite : 1;             /**< Bit 62      - IW: I/O Wead permission. */
+        RT_GCC_EXTENSION uint64_t    u1Ign0 : 1;                /**< Bit 63      - Ignored. */
+    } n;
+    /** The 64-bit unsigned integer view. */
+    uint64_t        u64;
+} IOPTE_T;
+AssertCompileSize(IOPTE_T, 8);
+
+/**
+ * I/O Page Directory Entry.
+ * In accordance with the AMD spec.
+ */
+typedef union
+{
+    struct
+    {
+        RT_GCC_EXTENSION uint64_t    u1Present : 1;         /**< Bit  0      - PR: Present. */
+        RT_GCC_EXTENSION uint64_t    u4Ign0 : 4;            /**< Bits 4:1    - Ignored. */
+        RT_GCC_EXTENSION uint64_t    u1Accessed : 1;        /**< Bit  5      - A: Accessed. */
+        RT_GCC_EXTENSION uint64_t    u3Ign0 : 3;            /**< Bits 8:6    - Ignored. */
+        RT_GCC_EXTENSION uint64_t    u3NextLevel : 3;       /**< Bits 11:9   - Next Level: Next page translation level. */
+        RT_GCC_EXTENSION uint64_t    u40PageAddr : 40;      /**< Bits 51:12  - Page address (Next Table Address). */
+        RT_GCC_EXTENSION uint64_t    u9Rsvd0 : 9;           /**< Bits 60:52  - Reserved. */
+        RT_GCC_EXTENSION uint64_t    u1IoRead : 1;          /**< Bit 61      - IR: I/O Read permission. */
+        RT_GCC_EXTENSION uint64_t    u1IoWrite : 1;         /**< Bit 62      - IW: I/O Wead permission. */
+        RT_GCC_EXTENSION uint64_t    u1Ign0 : 1;            /**< Bit 63      - Ignored. */
+    } n;
+    /** The 64-bit unsigned integer view. */
+    uint64_t        u64;
+} IOPDE_T;
+AssertCompileSize(IOPDE_T, 8);
+
+/**
+ * I/O Page Table Entity.
+ * In accordance with the AMD spec.
+ *
+ * This a common subset of an DTE.au64[0], PTE and PDE.
+ * Named as an "entity" to avoid confusing it with PTE.
+ */
+typedef union
+{
+    struct
+    {
+        RT_GCC_EXTENSION uint64_t    u1Present : 1;         /**< Bit  0      - PR: Present. */
+        RT_GCC_EXTENSION uint64_t    u8Ign0 : 8;            /**< Bits 8:1    - Ignored. */
+        RT_GCC_EXTENSION uint64_t    u3NextLevel : 3;       /**< Bits 11:9   - Mode / Next Level: Next page translation level. */
+        RT_GCC_EXTENSION uint64_t    u40Addr : 40;          /**< Bits 51:12  - Page address. */
+        RT_GCC_EXTENSION uint64_t    u9Ign0 : 9;            /**< Bits 60:52  - Ignored. */
+        RT_GCC_EXTENSION uint64_t    u1IoRead : 1;          /**< Bit 61      - IR: I/O Read permission. */
+        RT_GCC_EXTENSION uint64_t    u1IoWrite : 1;         /**< Bit 62      - IW: I/O Wead permission. */
+        RT_GCC_EXTENSION uint64_t    u1Ign0 : 1;            /**< Bit 63      - Ignored. */
+    } n;
+    /** The 64-bit unsigned integer view. */
+    uint64_t        u64;
+} IOPTENTITY_T;
+AssertCompileSize(IOPTENTITY_T, 8);
+AssertCompile(sizeof(IOPTENTITY_T) == sizeof(IOPTE_T));
+AssertCompile(sizeof(IOPTENTITY_T) == sizeof(IOPDE_T));
+/** Pointer to an IOPT_ENTITY_T struct. */
+typedef IOPTENTITY_T *PIOPTENTITY_T;
+/** Pointer to a const IOPT_ENTITY_T struct. */
+typedef IOPTENTITY_T const *PCIOPTENTITY_T;
+/** Mask of the address field. */
+#define IOMMU_PTENTITY_ADDR_MASK     UINT64_C(0x000ffffffffff000)
+
+/**
+ * Interrupt Remapping Table Entry (IRTE).
+ * In accordance with the AMD spec.
+ */
+typedef union
+{
+    struct
+    {
+        uint32_t    u1RemapEnable : 1;      /**< Bit  0     - RemapEn: Remap Enable. */
+        uint32_t    u1SuppressPf : 1;       /**< Bit  1     - SupIOPF: Supress I/O Page Fault. */
+        uint32_t    u3IntrType : 1;         /**< Bits 4:2   - IntType: Interrupt Type. */
+        uint32_t    u1ReqEoi : 1;           /**< Bit  5     - RqEoi: Request EOI. */
+        uint32_t    u1DestMode : 1;         /**< Bit  6     - DM: Destination Mode. */
+        uint32_t    u1GuestMode : 1;        /**< Bit  7     - GuestMode. */
+        uint32_t    u8Dest : 8;             /**< Bits 15:8  - Destination. */
+        uint32_t    u8Vector : 8;           /**< Bits 23:16 - Vector. */
+        uint32_t    u8Rsvd0 : 8;            /**< Bits 31:24 - Reserved. */
+    } n;
+    /** The 32-bit unsigned integer view. */
+    uint32_t        u32;
+} IRTE_T;
+AssertCompileSize(IRTE_T, 4);
+/** The number of bits to shift the IRTE offset to get the IRTE. */
+#define IOMMU_IRTE_SIZE_SHIFT   (2)
+/** Pointer to an IRTE_T struct. */
+typedef IRTE_T *PIRTE_T;
+/** Pointer to a const IRTE_T struct. */
+typedef IRTE_T const *PCIRTE_T;
+
+/** The IRTE offset corresponds directly to bits 10:0 of the originating MSI
+ *  interrupt message. See AMD IOMMU spec. 2.2.5 "Interrupt Remapping Tables". */
+#define IOMMU_MSI_DATA_IRTE_OFFSET_MASK     UINT32_C(0x000007ff)
+
+/**
+ * Command: Generic Command Buffer Entry.
+ * In accordance with the AMD spec.
+ */
+typedef union
+{
+    struct
+    {
+        uint32_t    u32Operand1Lo;          /**< Bits 31:0   - Operand 1 (Lo). */
+        uint32_t    u32Operand1Hi : 28;     /**< Bits 59:32  - Operand 1 (Hi). */
+        uint32_t    u4Opcode : 4;           /**< Bits 63:60  - Op Code. */
+        uint64_t    u64Operand2;            /**< Bits 127:64 - Operand 2. */
+    } n;
+    /** The 64-bit unsigned integer view. */
+    uint64_t    au64[2];
+} CMD_GENERIC_T;
+AssertCompileSize(CMD_GENERIC_T, 16);
+/** Pointer to a generic command buffer entry. */
+typedef CMD_GENERIC_T *PCMD_GENERIC_T;
+/** Pointer to a const generic command buffer entry. */
+typedef CMD_GENERIC_T const *PCCMD_GENERIC_T;
+
+/** Number of bits to shift the byte offset of a command in the command buffer to
+ *  get its index. */
+#define IOMMU_CMD_GENERIC_SHIFT   4
+
+/**
+ * Command: COMPLETION_WAIT.
+ * In accordance with the AMD spec.
+ */
+typedef union
+{
+    struct
+    {
+        uint32_t    u1Store : 1;           /**< Bit  0      - S: Completion Store. */
+        uint32_t    u1Interrupt : 1;       /**< Bit  1      - I: Completion Interrupt. */
+        uint32_t    u1Flush : 1;           /**< Bit  2      - F: Flush Queue. */
+        uint32_t    u29StoreAddrLo : 29;   /**< Bits 31:3   - Store Address (Lo). */
+        uint32_t    u20StoreAddrHi : 20;   /**< Bits 51:32  - Store Address (Hi). */
+        uint32_t    u8Rsvd0 : 8;           /**< Bits 59:52  - Reserved. */
+        uint32_t    u4OpCode : 4;          /**< Bits 63:60  - OpCode (Command). */
+        uint64_t    u64StoreData;          /**< Bits 127:64 - Store Data. */
+    } n;
+    /** The 64-bit unsigned integer view. */
+    uint64_t    au64[2];
+} CMD_COMWAIT_T;
+AssertCompileSize(CMD_COMWAIT_T, 16);
+/** Pointer to a completion wait command. */
+typedef CMD_COMWAIT_T *PCMD_COMWAIT_T;
+/** Pointer to a const completion wait command. */
+typedef CMD_COMWAIT_T const *PCCMD_COMWAIT_T;
+#define IOMMU_CMD_COM_WAIT_QWORD_0_VALID_MASK        UINT64_C(0xf00fffffffffffff)
+
+/**
+ * Command: INVALIDATE_DEVTAB_ENTRY.
+ * In accordance with the AMD spec.
+ */
+typedef union
+{
+    struct
+    {
+        uint16_t                     u16DevId;          /**< Bits 15:0   - Device ID. */
+        uint16_t                     u16Rsvd0;          /**< Bits 31:16  - Reserved. */
+        uint32_t                     u28Rsvd0 : 28;     /**< Bits 59:32  - Reserved. */
+        uint32_t                     u4OpCode : 4;      /**< Bits 63:60  - Op Code (Command). */
+        uint64_t                     u64Rsvd0;          /**< Bits 127:64 - Reserved. */
+    } n;
+    /** The 64-bit unsigned integer view. */
+    uint64_t    au64[2];
+} CMD_INV_DTE_T;
+AssertCompileSize(CMD_INV_DTE_T, 16);
+
+/**
+ * Command: INVALIDATE_IOMMU_PAGES.
+ * In accordance with the AMD spec.
+ */
+typedef union
+{
+    struct
+    {
+        uint32_t    u20Pasid : 20;          /**< Bits 19:0   - PASID: Process Address-Space ID. */
+        uint32_t    u12Rsvd0 : 12;          /**< Bits 31:20  - Reserved. */
+        uint32_t    u16DomainId : 16;       /**< Bits 47:32  - Domain ID. */
+        uint32_t    u12Rsvd1 : 12;          /**< Bits 59:48  - Reserved. */
+        uint32_t    u4OpCode : 4;           /**< Bits 63:60  - Op Code (Command). */
+        uint32_t    u1Size : 1;             /**< Bit  64     - S: Size. */
+        uint32_t    u1PageDirEntries : 1;   /**< Bit  65     - PDE: Page Directory Entries. */
+        uint32_t    u1GuestOrNested : 1;    /**< Bit  66     - GN: Guest (GPA) or Nested (GVA). */
+        uint32_t    u9Rsvd0 : 9;            /**< Bits 75:67  - Reserved. */
+        uint32_t    u20AddrLo : 20;         /**< Bits 95:76  - Address (Lo). */
+        uint32_t    u32AddrHi;              /**< Bits 127:96 - Address (Hi). */
+    } n;
+    /** The 64-bit unsigned integer view. */
+    uint64_t    au64[2];
+} CMD_INV_IOMMU_PAGES_T;
+AssertCompileSize(CMD_INV_IOMMU_PAGES_T, 16);
+
+/**
+ * Command: INVALIDATE_IOTLB_PAGES.
+ * In accordance with the AMD spec.
+ */
+typedef union
+{
+    struct
+    {
+        uint16_t    u16DevId;               /**< Bits 15:0   - Device ID. */
+        uint8_t     u8PasidLo;              /**< Bits 23:16  - PASID: Process Address-Space ID (Lo). */
+        uint8_t     u8MaxPend;              /**< Bits 31:24  - Maxpend: Maximum simultaneous in-flight transactions. */
+        uint32_t    u16QueueId : 16;        /**< Bits 47:32  - Queue ID. */
+        uint32_t    u12PasidHi : 12;        /**< Bits 59:48  - PASID: Process Address-Space ID (Hi). */
+        uint32_t    u4OpCode : 4;           /**< Bits 63:60  - Op Code (Command). */
+        uint32_t    u1Size : 1;             /**< Bit  64     - S: Size. */
+        uint32_t    u1Rsvd0: 1;             /**< Bit  65     - Reserved. */
+        uint32_t    u1GuestOrNested : 1;    /**< Bit  66     - GN: Guest (GPA) or Nested (GVA). */
+        uint32_t    u1Rsvd1 : 1;            /**< Bit  67     - Reserved. */
+        uint32_t    u2Type : 2;             /**< Bit  69:68  - Type. */
+        uint32_t    u6Rsvd0 : 6;            /**< Bits 75:70  - Reserved. */
+        uint32_t    u20AddrLo : 20;         /**< Bits 95:76  - Address (Lo). */
+        uint32_t    u32AddrHi;              /**< Bits 127:96 - Address (Hi). */
+    } n;
+    /** The 64-bit unsigned integer view. */
+    uint64_t    au64[2];
+} CMD_INV_IOTLB_PAGES_T;
+AssertCompileSize(CMD_INV_IOTLB_PAGES_T, 16);
+
+/**
+ * Command: INVALIDATE_INTR_TABLE.
+ * In accordance with the AMD spec.
+ */
+typedef union
+{
+    struct
+    {
+        uint16_t    u16DevId;           /**< Bits 15:0   - Device ID. */
+        uint16_t    u16Rsvd0;           /**< Bits 31:16  - Reserved. */
+        uint32_t    u32Rsvd0 : 28;      /**< Bits 59:32  - Reserved. */
+        uint32_t    u4OpCode : 4;       /**< Bits 63:60  - Op Code (Command). */
+        uint64_t    u64Rsvd0;           /**< Bits 127:64 - Reserved. */
+    } u;
+    /** The 64-bit unsigned integer view. */
+    uint64_t    au64[2];
+} CMD_INV_INTR_TABLE_T;
+AssertCompileSize(CMD_INV_INTR_TABLE_T, 16);
+
+/**
+ * Command: COMPLETE_PPR_REQ.
+ * In accordance with the AMD spec.
+ */
+typedef union
+{
+    struct
+    {
+        uint16_t    u16DevId;               /**< Bits 15:0    - Device ID. */
+        uint16_t    u16Rsvd0;               /**< Bits 31:16   - Reserved. */
+        uint32_t    u20Pasid : 20;          /**< Bits 51:32   - PASID: Process Address-Space ID. */
+        uint32_t    u8Rsvd0 : 8;            /**< Bits 59:52   - Reserved. */
+        uint32_t    u4OpCode : 4;           /**< Bits 63:60   - Op Code (Command). */
+        uint32_t    u2Rsvd0 : 2;            /**< Bits 65:64   - Reserved. */
+        uint32_t    u1GuestOrNested : 1;    /**< Bit  66      - GN: Guest (GPA) or Nested (GVA). */
+        uint32_t    u29Rsvd0 : 29;          /**< Bits 95:67   - Reserved. */
+        uint32_t    u16CompletionTag : 16;  /**< Bits 111:96  - Completion Tag. */
+        uint32_t    u16Rsvd1 : 16;          /**< Bits 127:112 - Reserved. */
+    } n;
+    /** The 64-bit unsigned integer view. */
+    uint64_t    au64[2];
+} CMD_COMPLETE_PPR_REQ_T;
+AssertCompileSize(CMD_COMPLETE_PPR_REQ_T, 16);
+
+/**
+ * Command: INV_IOMMU_ALL.
+ * In accordance with the AMD spec.
+ */
+typedef union
+{
+    struct
+    {
+        uint32_t    u32Rsvd0;           /**< Bits 31:0   - Reserved. */
+        uint32_t    u28Rsvd0 : 28;      /**< Bits 59:32  - Reserved. */
+        uint32_t    u4OpCode : 4;       /**< Bits 63:60  - Op Code (Command). */
+        uint64_t    u64Rsvd0;           /**< Bits 127:64 - Reserved. */
+    } n;
+    /** The 64-bit unsigned integer view. */
+    uint64_t    au64[2];
+} CMD_IOMMU_ALL_T;
+AssertCompileSize(CMD_IOMMU_ALL_T, 16);
+
+/**
+ * Event Log Entry: Generic.
+ * In accordance with the AMD spec.
+ */
+typedef union
+{
+    struct
+    {
+        uint32_t    u32Operand1Lo;          /**< Bits 31:0   - Operand 1 (Lo). */
+        uint32_t    u32Operand1Hi : 28;     /**< Bits 59:32  - Operand 1 (Hi). */
+        uint32_t    u4EvtCode : 4;          /**< Bits 63:60  - Event code. */
+        uint32_t    u32Operand2Lo;          /**< Bits 95:64  - Operand 2 (Lo). */
+        uint32_t    u32Operand2Hi;          /**< Bits 127:96 - Operand 2 (Hi). */
+    } n;
+    /** The 32-bit unsigned integer view.  */
+    uint32_t    au32[4];
+} EVT_GENERIC_T;
+AssertCompileSize(EVT_GENERIC_T, 16);
+/** Number of bits to shift the byte offset of an event entry in the event log
+ *  buffer to get its index. */
+#define IOMMU_EVT_GENERIC_SHIFT   4
+/** Pointer to a generic event log entry. */
+typedef EVT_GENERIC_T *PEVT_GENERIC_T;
+/** Pointer to a const generic event log entry. */
+typedef const EVT_GENERIC_T *PCEVT_GENERIC_T;
+
+/**
+ * Hardware event types.
+ * In accordance with the AMD spec.
+ */
+typedef enum HWEVTTYPE
+{
+    HWEVTTYPE_RSVD = 0,
+    HWEVTTYPE_MASTER_ABORT,
+    HWEVTTYPE_TARGET_ABORT,
+    HWEVTTYPE_DATA_ERROR
+} HWEVTTYPE;
+AssertCompileSize(HWEVTTYPE, 4);
+
+/**
+ * Event Log Entry: ILLEGAL_DEV_TABLE_ENTRY.
+ * In accordance with the AMD spec.
+ */
+typedef union
+{
+    struct
+    {
+        uint16_t    u16DevId;               /**< Bits 15:0   - Device ID. */
+        uint16_t    u4PasidHi : 4;          /**< Bits 19:16  - PASID: Process Address-Space ID (Hi). */
+        uint16_t    u12Rsvd0 : 12;          /**< Bits 31:20  - Reserved. */
+        uint16_t    u16PasidLo;             /**< Bits 47:32  - PASID: Process Address-Space ID (Lo). */
+        uint16_t    u1GuestOrNested : 1;    /**< Bit  48     - GN: Guest (GPA) or Nested (GVA). */
+        uint16_t    u2Rsvd0 : 2;            /**< Bits 50:49  - Reserved. */
+        uint16_t    u1Interrupt : 1;        /**< Bit  51     - I: Interrupt. */
+        uint16_t    u1Rsvd0 : 1;            /**< Bit  52     - Reserved. */
+        uint16_t    u1ReadWrite : 1;        /**< Bit  53     - RW: Read/Write. */
+        uint16_t    u1Rsvd1 : 1;            /**< Bit  54     - Reserved. */
+        uint16_t    u1RsvdNotZero : 1;      /**< Bit  55     - RZ: Reserved bit not Zero (0=invalid level encoding). */
+        uint16_t    u1Translation : 1;      /**< Bit  56     - TN: Translation. */
+        uint16_t    u3Rsvd0 : 3;            /**< Bits 59:57  - Reserved. */
+        uint16_t    u4EvtCode : 4;          /**< Bits 63:60  - Event code. */
+        uint64_t    u64Addr;                /**< Bits 127:64 - Address: I/O Virtual Address (IOVA). */
+    } n;
+    /** The 32-bit unsigned integer view.  */
+    uint32_t    au32[4];
+    /** The 64-bit unsigned integer view. */
+    uint64_t    au64[2];
+} EVT_ILLEGAL_DTE_T;
+AssertCompileSize(EVT_ILLEGAL_DTE_T, 16);
+/** Pointer to an illegal device table entry event. */
+typedef EVT_ILLEGAL_DTE_T *PEVT_ILLEGAL_DTE_T;
+/** Pointer to a const illegal device table entry event. */
+typedef EVT_ILLEGAL_DTE_T const *PCEVT_ILLEGAL_DTE_T;
+
+/**
+ * Event Log Entry: IO_PAGE_FAULT_EVENT.
+ * In accordance with the AMD spec.
+ */
+typedef union
+{
+    struct
+    {
+        uint16_t    u16DevId;               /**< Bits 15:0   - Device ID. */
+        uint16_t    u4PasidHi : 4;          /**< Bits 19:16  - PASID: Process Address-Space ID (Hi). */
+        uint16_t    u16DomainOrPasidLo;     /**< Bits 47:32  - D/P: Domain ID or Process Address-Space ID (Lo). */
+        uint16_t    u1GuestOrNested : 1;    /**< Bit  48     - GN: Guest (GPA) or Nested (GVA). */
+        uint16_t    u1NoExecute : 1;        /**< Bit  49     - NX: No Execute. */
+        uint16_t    u1User : 1;             /**< Bit  50     - US: User/Supervisor. */
+        uint16_t    u1Interrupt : 1;        /**< Bit  51     - I: Interrupt. */
+        uint16_t    u1Present : 1;          /**< Bit  52     - PR: Present. */
+        uint16_t    u1ReadWrite : 1;        /**< Bit  53     - RW: Read/Write. */
+        uint16_t    u1PermDenied : 1;       /**< Bit  54     - PE: Permission Indicator. */
+        uint16_t    u1RsvdNotZero : 1;      /**< Bit  55     - RZ: Reserved bit not Zero (0=invalid level encoding). */
+        uint16_t    u1Translation : 1;      /**< Bit  56     - TN: Translation. */
+        uint16_t    u3Rsvd0 : 3;            /**< Bit  59:57  - Reserved. */
+        uint16_t    u4EvtCode : 4;          /**< Bits 63:60  - Event code. */
+        uint64_t    u64Addr;                /**< Bits 127:64 - Address: I/O Virtual Address (IOVA). */
+    } n;
+    /** The 32-bit unsigned integer view.  */
+    uint32_t    au32[4];
+    /** The 64-bit unsigned integer view. */
+    uint64_t    au64[2];
+} EVT_IO_PAGE_FAULT_T;
+AssertCompileSize(EVT_IO_PAGE_FAULT_T, 16);
+/** Pointer to an I/O page fault event. */
+typedef EVT_IO_PAGE_FAULT_T *PEVT_IO_PAGE_FAULT_T;
+/** Pointer to a const I/O page fault event. */
+typedef EVT_IO_PAGE_FAULT_T const *PCEVT_IO_PAGE_FAULT_T;
+
+
+/**
+ * Event Log Entry: DEV_TAB_HARDWARE_ERROR.
+ * In accordance with the AMD spec.
+ */
+typedef union
+{
+    struct
+    {
+        uint16_t    u16DevId;               /**< Bits 15:0   - Device ID. */
+        uint16_t    u16Rsvd0;               /**< Bits 31:16  - Reserved. */
+        uint32_t    u19Rsvd0 : 19;          /**< Bits 50:32  - Reserved. */
+        uint32_t    u1Intr : 1;             /**< Bit  51     - I: Interrupt (1=interrupt request, 0=memory request). */
+        uint32_t    u1Rsvd0 : 1;            /**< Bit  52     - Reserved. */
+        uint32_t    u1ReadWrite : 1;        /**< Bit  53     - RW: Read/Write transaction (only meaninful when I=0 and TR=0). */
+        uint32_t    u2Rsvd0 : 2;            /**< Bits 55:54  - Reserved. */
+        uint32_t    u1Translation : 1;      /**< Bit  56     - TR: Translation (1=translation, 0=transaction). */
+        uint32_t    u2Type : 2;             /**< Bits 58:57  - Type: The type of hardware error. */
+        uint32_t    u1Rsvd1 : 1;            /**< Bit  59     - Reserved. */
+        uint32_t    u4EvtCode : 4;          /**< Bits 63:60  - Event code. */
+        uint64_t    u64Addr;                /**< Bits 127:64 - Address. */
+    } n;
+    /** The 32-bit unsigned integer view.  */
+    uint32_t    au32[4];
+    /** The 64-bit unsigned integer view. */
+    uint64_t    au64[2];
+} EVT_DEV_TAB_HW_ERROR_T;
+AssertCompileSize(EVT_DEV_TAB_HW_ERROR_T, 16);
+/** Pointer to a device table hardware error event. */
+typedef EVT_DEV_TAB_HW_ERROR_T *PEVT_DEV_TAB_HW_ERROR_T;
+/** Pointer to a const device table hardware error event. */
+typedef EVT_DEV_TAB_HW_ERROR_T const *PCEVT_DEV_TAB_HW_ERROR_T;
+
+/**
+ * Event Log Entry: EVT_PAGE_TAB_HARDWARE_ERROR.
+ * In accordance with the AMD spec.
+ */
+typedef union
+{
+    struct
+    {
+        uint16_t    u16DevId;                   /**< Bits 15:0   - Device ID. */
+        uint16_t    u16Rsvd0;                   /**< Bits 31:16  - Reserved. */
+        uint32_t    u16DomainOrPasidLo : 16;    /**< Bits 47:32  - D/P: Domain ID or Process Address-Space ID (Lo). */
+        uint32_t    u1GuestOrNested : 1;        /**< Bit  48     - GN: Guest (GPA) or Nested (GVA). */
+        uint32_t    u2Rsvd0 : 2;                /**< Bits 50:49  - Reserved. */
+        uint32_t    u1Interrupt : 1;            /**< Bit  51     - I: Interrupt. */
+        uint32_t    u1Rsvd0 : 1;                /**< Bit  52     - Reserved. */
+        uint32_t    u1ReadWrite : 1;            /**< Bit  53     - RW: Read/Write. */
+        uint32_t    u2Rsvd1 : 2;                /**< Bit  55:54  - Reserved. */
+        uint32_t    u1Translation : 1;          /**< Bit  56     - TR: Translation. */
+        uint32_t    u2Type : 2;                 /**< Bits 58:57  - Type: The type of hardware error. */
+        uint32_t    u1Rsvd1 : 1;                /**< Bit  59     - Reserved. */
+        uint32_t    u4EvtCode : 4;              /**< Bit  63:60  - Event code. */
+        /** @todo r=ramshankar: Figure 55: PAGE_TAB_HARDWARE_ERROR says Addr[31:3] but
+         *        table 58 mentions Addr[31:4], we just use the full 64-bits. Looks like a
+         *        typo in the figure.See AMD AMD IOMMU spec (3.05-PUB, Jan 2020). */
+        uint64_t    u64Addr;                    /** Bits 127:64  - Address: SPA of the page table entry. */
+    } n;
+    /** The 32-bit unsigned integer view. */
+    uint32_t    au32[4];
+    /** The 64-bit unsigned integer view. */
+    uint64_t    au64[2];
+} EVT_PAGE_TAB_HW_ERR_T;
+AssertCompileSize(EVT_PAGE_TAB_HW_ERR_T, 16);
+/** Pointer to a page table hardware error event. */
+typedef EVT_PAGE_TAB_HW_ERR_T *PEVT_PAGE_TAB_HW_ERR_T;
+/** Pointer to a const page table hardware error event. */
+typedef EVT_PAGE_TAB_HW_ERR_T const *PCEVT_PAGE_TAB_HW_ERR_T;
+
+/**
+ * Event Log Entry: ILLEGAL_COMMAND_ERROR.
+ * In accordance with the AMD spec.
+ */
+typedef union
+{
+    struct
+    {
+        uint32_t    u32Rsvd0;           /**< Bits 31:0   - Reserved. */
+        uint32_t    u28Rsvd0 : 28;      /**< Bits 47:32  - Reserved. */
+        uint32_t    u4EvtCode : 4;      /**< Bits 63:60  - Event code. */
+        uint64_t    u64Addr;            /**< Bits 127:64 - Address: SPA of the invalid command. */
+    } n;
+    /** The 32-bit unsigned integer view. */
+    uint32_t    au32[4];
+    /** The 64-bit unsigned integer view. */
+    uint64_t    au64[2];
+} EVT_ILLEGAL_CMD_ERR_T;
+AssertCompileSize(EVT_ILLEGAL_CMD_ERR_T, 16);
+/** Pointer to an illegal command error event. */
+typedef EVT_ILLEGAL_CMD_ERR_T *PEVT_ILLEGAL_CMD_ERR_T;
+/** Pointer to a const illegal command error event. */
+typedef EVT_ILLEGAL_CMD_ERR_T const *PCEVT_ILLEGAL_CMD_ERR_T;
+
+/**
+ * Event Log Entry: COMMAND_HARDWARE_ERROR.
+ * In accordance with the AMD spec.
+ */
+typedef union
+{
+    struct
+    {
+        uint32_t    u32Rsvd0;           /**< Bits 31:0   - Reserved. */
+        uint32_t    u25Rsvd1 : 25;      /**< Bits 56:32  - Reserved. */
+        uint32_t    u2Type : 2;         /**< Bits 58:57  - Type: The type of hardware error. */
+        uint32_t    u1Rsvd1 : 1;        /**< Bit  59     - Reserved. */
+        uint32_t    u4EvtCode : 4;      /**< Bits 63:60  - Event code. */
+        uint64_t    u64Addr;            /**< Bits 128:64 - Address: SPA of the attempted access. */
+    } n;
+    /** The 32-bit unsigned integer view. */
+    uint32_t    au32[4];
+    /** The 64-bit unsigned integer view. */
+    uint64_t    au64[2];
+} EVT_CMD_HW_ERR_T;
+AssertCompileSize(EVT_CMD_HW_ERR_T, 16);
+/** Pointer to a command hardware error event. */
+typedef EVT_CMD_HW_ERR_T *PEVT_CMD_HW_ERR_T;
+/** Pointer to a const command hardware error event. */
+typedef EVT_CMD_HW_ERR_T const *PCEVT_CMD_HW_ERR_T;
+
+/**
+ * Event Log Entry: IOTLB_INV_TIMEOUT.
+ * In accordance with the AMD spec.
+ */
+typedef union
+{
+    struct
+    {
+        uint16_t    u16DevId;           /**< Bits 15:0   - Device ID. */
+        uint16_t    u16Rsvd0;           /**< Bits 31:16  - Reserved.*/
+        uint32_t    u28Rsvd0 : 28;      /**< Bits 59:32  - Reserved. */
+        uint32_t    u4EvtCode : 4;      /**< Bits 63:60  - Event code. */
+        uint32_t    u4Rsvd0 : 4;        /**< Bits 67:64  - Reserved. */
+        uint32_t    u28AddrLo : 28;     /**< Bits 95:68  - Address: SPA of the invalidation command that timedout (Lo). */
+        uint32_t    u32AddrHi;          /**< Bits 127:96 - Address: SPA of the invalidation command that timedout (Hi). */
+    } n;
+    /** The 32-bit unsigned integer view. */
+    uint32_t    au32[4];
+} EVT_IOTLB_INV_TIMEOUT_T;
+AssertCompileSize(EVT_IOTLB_INV_TIMEOUT_T, 16);
+
+/**
+ * Event Log Entry: INVALID_DEVICE_REQUEST.
+ * In accordance with the AMD spec.
+ */
+typedef union
+{
+    struct
+    {
+        uint32_t    u16DevId : 16;          /***< Bits 15:0   - Device ID. */
+        uint32_t    u4PasidHi : 4;          /***< Bits 19:16  - PASID: Process Address-Space ID (Hi). */
+        uint32_t    u12Rsvd0 : 12;          /***< Bits 31:20  - Reserved. */
+        uint32_t    u16PasidLo : 16;        /***< Bits 47:32  - PASID: Process Address-Space ID (Lo). */
+        uint32_t    u1GuestOrNested : 1;    /***< Bit  48     - GN: Guest (GPA) or Nested (GVA). */
+        uint32_t    u1User : 1;             /***< Bit  49     - US: User/Supervisor. */
+        uint32_t    u6Rsvd0 : 6;            /***< Bits 55:50  - Reserved. */
+        uint32_t    u1Translation: 1;       /***< Bit  56     - TR: Translation. */
+        uint32_t    u3Type: 3;              /***< Bits 59:57  - Type: The type of hardware error. */
+        uint32_t    u4EvtCode : 4;          /***< Bits 63:60  - Event code. */
+        uint64_t    u64Addr;                /***< Bits 127:64 - Address: Translation or access address. */
+    } n;
+    /** The 32-bit unsigned integer view. */
+    uint32_t    au32[4];
+} EVT_INVALID_DEV_REQ_T;
+AssertCompileSize(EVT_INVALID_DEV_REQ_T, 16);
+
+/**
+ * Event Log Entry: EVENT_COUNTER_ZERO.
+ * In accordance with the AMD spec.
+ */
+typedef union
+{
+    struct
+    {
+        uint32_t    u32Rsvd0;               /**< Bits 31:0   - Reserved. */
+        uint32_t    u28Rsvd0 : 28;          /**< Bits 59:32  - Reserved. */
+        uint32_t    u4EvtCode : 4;          /**< Bits 63:60  - Event code. */
+        uint32_t    u20CounterNoteHi : 20;  /**< Bits 83:64  - CounterNote: Counter value for the event counter register (Hi). */
+        uint32_t    u12Rsvd0 : 12;          /**< Bits 95:84  - Reserved. */
+        uint32_t    u32CounterNoteLo;       /**< Bits 127:96 - CounterNote: Counter value for the event cuonter register (Lo). */
+    } n;
+    /** The 32-bit unsigned integer view. */
+    uint32_t    au32[4];
+} EVT_EVENT_COUNTER_ZERO_T;
+AssertCompileSize(EVT_EVENT_COUNTER_ZERO_T, 16);
+
+/**
+ * IOMMU Capability Header (PCI).
+ * In accordance with the AMD spec.
+ */
+typedef union
+{
+    struct
+    {
+        uint32_t    u8CapId : 8;        /**< Bits 7:0   - CapId: Capability ID. */
+        uint32_t    u8CapPtr : 8;       /**< Bits 15:8  - CapPtr: Pointer (PCI config offset) to the next capability. */
+        uint32_t    u3CapType : 3;      /**< Bits 18:16 - CapType: Capability Type. */
+        uint32_t    u5CapRev : 5;       /**< Bits 23:19 - CapRev: Capability revision. */
+        uint32_t    u1IoTlbSup : 1;     /**< Bit  24    - IotlbSup: IOTLB Support. */
+        uint32_t    u1HtTunnel : 1;     /**< Bit  25    - HtTunnel: HyperTransport Tunnel translation support. */
+        uint32_t    u1NpCache : 1;      /**< Bit  26    - NpCache: Not Present table entries are cached. */
+        uint32_t    u1EfrSup : 1;       /**< Bit  27    - EFRSup: Extended Feature Register Support. */
+        uint32_t    u1CapExt : 1;       /**< Bit  28    - CapExt: Misc. Information Register 1 Support. */
+        uint32_t    u3Rsvd0 : 3;        /**< Bits 31:29 - Reserved. */
+    } n;
+    /** The 32-bit unsigned integer view. */
+    uint32_t    u32;
+} IOMMU_CAP_HDR_T;
+AssertCompileSize(IOMMU_CAP_HDR_T, 4);
+
+/**
+ * IOMMU Base Address (Lo and Hi) Register (PCI).
+ * In accordance with the AMD spec.
+ */
+typedef union
+{
+    struct
+    {
+        uint32_t   u1Enable : 1;       /**< Bit  1     - Enable: RW1S - Enable IOMMU MMIO region. */
+        uint32_t   u12Rsvd0 : 12;      /**< Bits 13:1  - Reserved. */
+        uint32_t   u18BaseAddrLo : 18; /**< Bits 31:14 - Base address (Lo) of the MMIO region. */
+        uint32_t   u32BaseAddrHi;      /**< Bits 63:32 - Base address (Hi) of the MMIO region. */
+    } n;
+    /** The 32-bit unsigned integer view. */
+    uint32_t    au32[2];
+    /** The 64-bit unsigned integer view. */
+    uint64_t    u64;
+} IOMMU_BAR_T;
+AssertCompileSize(IOMMU_BAR_T, 8);
+#define IOMMU_BAR_VALID_MASK        UINT64_C(0xffffffffffffc001)
+
+/**
+ * IOMMU Range Register (PCI).
+ * In accordance with the AMD spec.
+ */
+typedef union
+{
+    struct
+    {
+        uint32_t    u5HtUnitId : 5;     /**< Bits 4:0   - UnitID: IOMMU HyperTransport Unit ID (not used). */
+        uint32_t    u2Rsvd0 : 2;        /**< Bits 6:5   - Reserved. */
+        uint32_t    u1RangeValid : 1;   /**< Bit  7     - RngValid: Range Valid. */
+        uint32_t    u8Bus : 8;          /**< Bits 15:8  - BusNumber: Bus number of the first and last device. */
+        uint32_t    u8FirstDevice : 8;  /**< Bits 23:16 - FirstDevice: Device and function number of the first device. */
+        uint32_t    u8LastDevice: 8;    /**< Bits 31:24 - LastDevice: Device and function number of the last device. */
+    } n;
+    /** The 32-bit unsigned integer view. */
+    uint32_t    u32;
+} IOMMU_RANGE_T;
+AssertCompileSize(IOMMU_RANGE_T, 4);
+
+/**
+ * Device Table Base Address Register (MMIO).
+ * In accordance with the AMD spec.
+ */
+typedef union
+{
+    struct
+    {
+        RT_GCC_EXTENSION uint64_t   u9Size : 9;     /**< Bits 8:0   - Size: Size of the device table. */
+        RT_GCC_EXTENSION uint64_t   u3Rsvd0 : 3;    /**< Bits 11:9  - Reserved. */
+        RT_GCC_EXTENSION uint64_t   u40Base : 40;   /**< Bits 51:12 - DevTabBase: Device table base address. */
+        RT_GCC_EXTENSION uint64_t   u12Rsvd0 : 12;  /**< Bits 63:52 - Reserved. */
+    } n;
+    /** The 64-bit unsigned integer view. */
+    uint64_t    u64;
+} DEV_TAB_BAR_T;
+AssertCompileSize(DEV_TAB_BAR_T, 8);
+#define IOMMU_DEV_TAB_BAR_VALID_MASK          UINT64_C(0x000ffffffffff1ff)
+#define IOMMU_DEV_TAB_SEG_BAR_VALID_MASK      UINT64_C(0x000ffffffffff0ff)
+
+/**
+ * Command Buffer Base Address Register (MMIO).
+ * In accordance with the AMD spec.
+ */
+typedef union
+{
+    struct
+    {
+        RT_GCC_EXTENSION uint64_t   u12Rsvd0 : 12;      /**< Bits 11:0  - Reserved. */
+        RT_GCC_EXTENSION uint64_t   u40Base : 40;       /**< Bits 51:12 - ComBase: Command buffer base address. */
+        RT_GCC_EXTENSION uint64_t   u4Rsvd0 : 4;        /**< Bits 55:52 - Reserved. */
+        RT_GCC_EXTENSION uint64_t   u4Len : 4;          /**< Bits 59:56 - ComLen: Command buffer length. */
+        RT_GCC_EXTENSION uint64_t   u4Rsvd1 : 4;        /**< Bits 63:60 - Reserved. */
+    } n;
+    /** The 64-bit unsigned integer view. */
+    uint64_t    u64;
+} CMD_BUF_BAR_T;
+AssertCompileSize(CMD_BUF_BAR_T, 8);
+#define IOMMU_CMD_BUF_BAR_VALID_MASK      UINT64_C(0x0f0ffffffffff000)
+
+/**
+ * Event Log Base Address Register (MMIO).
+ * In accordance with the AMD spec.
+ */
+typedef union
+{
+    struct
+    {
+        RT_GCC_EXTENSION uint64_t   u12Rsvd0 : 12;      /**< Bits 11:0  - Reserved. */
+        RT_GCC_EXTENSION uint64_t   u40Base : 40;       /**< Bits 51:12 - EventBase: Event log base address. */
+        RT_GCC_EXTENSION uint64_t   u4Rsvd0 : 4;        /**< Bits 55:52 - Reserved. */
+        RT_GCC_EXTENSION uint64_t   u4Len : 4;          /**< Bits 59:56 - EventLen: Event log length. */
+        RT_GCC_EXTENSION uint64_t   u4Rsvd1 : 4;        /**< Bits 63:60 - Reserved. */
+    } n;
+    /** The 64-bit unsigned integer view. */
+    uint64_t    u64;
+} EVT_LOG_BAR_T;
+AssertCompileSize(EVT_LOG_BAR_T, 8);
+#define IOMMU_EVT_LOG_BAR_VALID_MASK      UINT64_C(0x0f0ffffffffff000)
+
+/**
+ * IOMMU Control Register (MMIO).
+ * In accordance with the AMD spec.
+ */
+typedef union
+{
+    struct
+    {
+        uint32_t    u1IommuEn : 1;               /**< Bit  0     - IommuEn: IOMMU Enable. */
+        uint32_t    u1HtTunEn : 1;               /**< Bit  1     - HtTunEn: HyperTransport Tunnel Enable. */
+        uint32_t    u1EvtLogEn : 1;              /**< Bit  2     - EventLogEn: Event Log Enable. */
+        uint32_t    u1EvtIntrEn : 1;             /**< Bit  3     - EventIntEn: Event Log Interrupt Enable. */
+        uint32_t    u1CompWaitIntrEn : 1;        /**< Bit  4     - ComWaitIntEn: Completion Wait Interrupt Enable. */
+        uint32_t    u3InvTimeOut : 3;            /**< Bits 7:5   - InvTimeOut: Invalidation Timeout. */
+        uint32_t    u1PassPW : 1;                /**< Bit  8     - PassPW: Pass Posted Write. */
+        uint32_t    u1ResPassPW : 1;             /**< Bit  9     - ResPassPW: Response Pass Posted Write. */
+        uint32_t    u1Coherent : 1;              /**< Bit  10    - Coherent: HT read request packet Coherent bit. */
+        uint32_t    u1Isoc : 1;                  /**< Bit  11    - Isoc: HT read request packet Isochronous bit. */
+        uint32_t    u1CmdBufEn : 1;              /**< Bit  12    - CmdBufEn: Command Buffer Enable. */
+        uint32_t    u1PprLogEn : 1;              /**< Bit  13    - PprLogEn: Peripheral Page Request (PPR) Log Enable. */
+        uint32_t    u1PprIntrEn : 1;             /**< Bit  14    - PprIntrEn: Peripheral Page Request Interrupt Enable. */
+        uint32_t    u1PprEn : 1;                 /**< Bit  15    - PprEn: Peripheral Page Request processing Enable. */
+        uint32_t    u1GstTranslateEn : 1;        /**< Bit  16    - GTEn: Guest Translate Enable. */
+        uint32_t    u1GstVirtApicEn : 1;         /**< Bit  17    - GAEn: Guest Virtual-APIC Enable. */
+        uint32_t    u4Crw : 1;                   /**< Bits 21:18 - CRW: Intended for future use (not documented). */
+        uint32_t    u1SmiFilterEn : 1;           /**< Bit  22    - SmiFEn: SMI Filter Enable. */
+        uint32_t    u1SelfWriteBackDis : 1;      /**< Bit  23    - SlfWBDis: Self Write-Back Disable. */
+        uint32_t    u1SmiFilterLogEn : 1;        /**< Bit  24    - SmiFLogEn: SMI Filter Log Enable. */
+        uint32_t    u3GstVirtApicModeEn : 3;     /**< Bits 27:25 - GAMEn: Guest Virtual-APIC Mode Enable. */
+        uint32_t    u1GstLogEn : 1;              /**< Bit  28    - GALogEn: Guest Virtual-APIC GA Log Enable. */
+        uint32_t    u1GstIntrEn : 1;             /**< Bit  29    - GAIntEn: Guest Virtual-APIC Interrupt Enable. */
+        uint32_t    u2DualPprLogEn : 2;          /**< Bits 31:30 - DualPprLogEn: Dual Peripheral Page Request Log Enable. */
+        uint32_t    u2DualEvtLogEn : 2;          /**< Bits 33:32 - DualEventLogEn: Dual Event Log Enable. */
+        uint32_t    u3DevTabSegEn : 3;           /**< Bits 36:34 - DevTblSegEn: Device Table Segment Enable. */
+        uint32_t    u2PrivAbortEn : 2;           /**< Bits 38:37 - PrivAbrtEn: Privilege Abort Enable. */
+        uint32_t    u1PprAutoRespEn : 1;         /**< Bit  39    - PprAutoRspEn: Peripheral Page Request Auto Response Enable. */
+        uint32_t    u1MarcEn : 1;                /**< Bit  40    - MarcEn: Memory Address Routing and Control Enable. */
+        uint32_t    u1BlockStopMarkEn : 1;       /**< Bit  41    - BlkStopMarkEn: Block StopMark messages Enable. */
+        uint32_t    u1PprAutoRespAlwaysOnEn : 1; /**< Bit  42    - PprAutoRspAon:: PPR Auto Response - Always On Enable. */
+        uint32_t    u1DomainIDPNE : 1;           /**< Bit  43    - DomainIDPE: Reserved (not documented). */
+        uint32_t    u1Rsvd0 : 1;                 /**< Bit  44    - Reserved. */
+        uint32_t    u1EnhancedPpr : 1;           /**< Bit  45    - EPHEn: Enhanced Peripheral Page Request Handling Enable. */
+        uint32_t    u2HstAccDirtyBitUpdate : 2;  /**< Bits 47:46 - HADUpdate: Access and Dirty Bit updated in host page table. */
+        uint32_t    u1GstDirtyUpdateDis : 1;     /**< Bit  48    - GDUpdateDis: Disable hardare update of Dirty bit in GPT. */
+        uint32_t    u1Rsvd1 : 1;                 /**< Bit  49    - Reserved. */
+        uint32_t    u1X2ApicEn : 1;              /**< Bit  50    - XTEn: Enable X2APIC. */
+        uint32_t    u1X2ApicIntrGenEn : 1;       /**< Bit  51    - IntCapXTEn: Enable IOMMU X2APIC Interrupt generation. */
+        uint32_t    u2Rsvd0 : 2;                 /**< Bits 53:52 - Reserved. */
+        uint32_t    u1GstAccessUpdateDis : 1;    /**< Bit  54    - GAUpdateDis: Disable hardare update of Access bit in GPT. */
+        uint32_t    u8Rsvd0 : 8;                 /**< Bits 63:55 - Reserved. */
+    } n;
+    /** The 64-bit unsigned integer view. */
+    uint64_t    u64;
+} IOMMU_CTRL_T;
+AssertCompileSize(IOMMU_CTRL_T, 8);
+#define IOMMU_CTRL_VALID_MASK           UINT64_C(0x004defffffffffff)
+#define IOMMU_CTRL_CMD_BUF_EN_MASK      UINT64_C(0x0000000000001001)
+
+/**
+ * IOMMU Exclusion Base Register (MMIO).
+ * In accordance with the AMD spec.
+ */
+typedef union
+{
+    struct
+    {
+        RT_GCC_EXTENSION uint64_t   u1ExclEnable : 1;       /**< Bit 0      - ExEn: Exclusion Range Enable. */
+        RT_GCC_EXTENSION uint64_t   u1AllowAll : 1;         /**< Bit 1      - Allow: Allow All Devices. */
+        RT_GCC_EXTENSION uint64_t   u10Rsvd0 : 10;          /**< Bits 11:2  - Reserved. */
+        RT_GCC_EXTENSION uint64_t   u40ExclRangeBase : 40;  /**< Bits 51:12 - Exclusion Range Base Address. */
+        RT_GCC_EXTENSION uint64_t   u12Rsvd0 : 12;          /**< Bits 63:52 - Reserved. */
+    } n;
+    /** The 64-bit unsigned integer view. */
+    uint64_t    u64;
+} IOMMU_EXCL_RANGE_BAR_T;
+AssertCompileSize(IOMMU_EXCL_RANGE_BAR_T, 8);
+#define IOMMU_EXCL_RANGE_BAR_VALID_MASK     UINT64_C(0x000ffffffffff003)
+
+/**
+ * IOMMU Exclusion Range Limit Register (MMIO).
+ * In accordance with the AMD spec.
+ */
+typedef union
+{
+    struct
+    {
+        RT_GCC_EXTENSION uint64_t   u52ExclLimit : 52;  /**< Bits 51:0 - Exclusion Range Limit (last 12 bits are treated as 1s). */
+        RT_GCC_EXTENSION uint64_t   u12Rsvd1 : 12;      /**< Bits 63:52 - Reserved. */
+    } n;
+    /** The 64-bit unsigned integer view. */
+    uint64_t    u64;
+} IOMMU_EXCL_RANGE_LIMIT_T;
+AssertCompileSize(IOMMU_EXCL_RANGE_LIMIT_T, 8);
+#define IOMMU_EXCL_RANGE_LIMIT_VALID_MASK   UINT64_C(0x000fffffffffffff)
+
+/**
+ * IOMMU Extended Feature Register (MMIO).
+ * In accordance with the AMD spec.
+ */
+typedef union
+{
+    struct
+    {
+        uint32_t    u1PrefetchSup : 1;            /**< Bit  0     - PreFSup: Prefetch Support. */
+        uint32_t    u1PprSup : 1;                 /**< Bit  1     - PPRSup: Peripheral Page Request Support. */
+        uint32_t    u1X2ApicSup : 1;              /**< Bit  2     - XTSup: x2Apic Support. */
+        uint32_t    u1NoExecuteSup : 1;           /**< Bit  3     - NXSup: No-Execute and Privilege Level Support. */
+        uint32_t    u1GstTranslateSup : 1;        /**< Bit  4     - GTSup: Guest Translations (for GVAs) Support. */
+        uint32_t    u1Rsvd0 : 1;                  /**< Bit  5     - Reserved. */
+        uint32_t    u1InvAllSup : 1;              /**< Bit  6     - IASup: Invalidate-All Support. */
+        uint32_t    u1GstVirtApicSup : 1;         /**< Bit  7     - GASup: Guest Virtual-APIC Support. */
+        uint32_t    u1HwErrorSup : 1;             /**< Bit  8     - HESup: Hardware Error registers Support. */
+        uint32_t    u1PerfCounterSup : 1;         /**< Bit  8     - PCSup: Performance Counter Support. */
+        uint32_t    u2HostAddrTranslateSize : 2;  /**< Bits 11:10 - HATS: Host Address Translation Size. */
+        uint32_t    u2GstAddrTranslateSize : 2;   /**< Bits 13:12 - GATS: Guest Address Translation Size. */
+        uint32_t    u2GstCr3RootTblLevel : 2;     /**< Bits 15:14 - GLXSup: Guest CR3 Root Table Level (Max) Size Support. */
+        uint32_t    u2SmiFilterSup : 2;           /**< Bits 17:16 - SmiFSup: SMI Filter Register Support. */
+        uint32_t    u3SmiFilterCount : 3;         /**< Bits 20:18 - SmiFRC: SMI Filter Register Count. */
+        uint32_t    u3GstVirtApicModeSup : 3;     /**< Bits 23:21 - GAMSup: Guest Virtual-APIC Modes Supported. */
+        uint32_t    u2DualPprLogSup : 2;          /**< Bits 25:24 - DualPprLogSup: Dual Peripheral Page Request Log Support. */
+        uint32_t    u2Rsvd0 : 2;                  /**< Bits 27:26 - Reserved. */
+        uint32_t    u2DualEvtLogSup : 2;          /**< Bits 29:28 - DualEventLogSup: Dual Event Log Support. */
+        uint32_t    u2Rsvd1 : 2;                  /**< Bits 31:30 - Reserved. */
+        uint32_t    u5MaxPasidSup : 5;            /**< Bits 36:32 - PASMax: Maximum PASID Supported. */
+        uint32_t    u1UserSupervisorSup : 1;      /**< Bit  37    - USSup: User/Supervisor Page Protection Support. */
+        uint32_t    u2DevTabSegSup : 2;           /**< Bits 39:38 - DevTlbSegSup: Segmented Device Table Support. */
+        uint32_t    u1PprLogOverflowWarn : 1;     /**< Bit  40    - PprOvrflwEarlySup: PPR Log Overflow Early Warning Support. */
+        uint32_t    u1PprAutoRespSup : 1;         /**< Bit  41    - PprAutoRspSup: PPR Automatic Response Support. */
+        uint32_t    u2MarcSup : 2;                /**< Bit  43:42 - MarcSup: Memory Access Routing and Control Support. */
+        uint32_t    u1BlockStopMarkSup : 1;       /**< Bit  44    - BlkStopMarkSup: Block StopMark messages Support. */
+        uint32_t    u1PerfOptSup : 1;             /**< Bit  45    - PerfOptSup: IOMMU Performance Optimization Support. */
+        uint32_t    u1MsiCapMmioSup : 1;          /**< Bit  46    - MsiCapMmioSup: MSI Capability Register MMIO Access Support. */
+        uint32_t    u1Rsvd1 : 1;                  /**< Bit  47    - Reserved. */
+        uint32_t    u1GstIoSup : 1;               /**< Bit  48    - GIoSup: Guest I/O Protection Support. */
+        uint32_t    u1HostAccessSup : 1;          /**< Bit  49    - HASup: Host Access Support. */
+        uint32_t    u1EnhancedPprSup : 1;         /**< Bit  50    - EPHSup: Enhanced Peripheral Page Request Handling Support. */
+        uint32_t    u1AttrForwardSup : 1;         /**< Bit  51    - AttrFWSup: Attribute Forward Support. */
+        uint32_t    u1HostDirtySup : 1;           /**< Bit  52    - HDSup: Host Dirty Support. */
+        uint32_t    u1Rsvd2 : 1;                  /**< Bit  53    - Reserved. */
+        uint32_t    u1InvIoTlbTypeSup : 1;        /**< Bit  54    - InvIotlbTypeSup: Invalidate IOTLB Type Support. */
+        uint32_t    u6Rsvd0 : 6;                  /**< Bit  60:55 - Reserved. */
+        uint32_t    u1GstUpdateDisSup : 1;        /**< Bit  61    - GAUpdateDisSup: Disable hardware update on GPT Support. */
+        uint32_t    u1ForcePhysDstSup : 1;        /**< Bit  62    - ForcePhyDestSup: Force Phys. Dst. Mode for Remapped Intr. */
+        uint32_t    u1Rsvd3 : 1;                  /**< Bit  63    - Reserved. */
+    } n;
+    /** The 64-bit unsigned integer view. */
+    uint64_t    u64;
+} IOMMU_EXT_FEAT_T;
+AssertCompileSize(IOMMU_EXT_FEAT_T, 8);
+
+/**
+ * Peripheral Page Request Log Base Address Register (MMIO).
+ * In accordance with the AMD spec.
+ */
+typedef union
+{
+    struct
+    {
+        RT_GCC_EXTENSION uint64_t   u12Rsvd0 : 12;      /**< Bit 11:0   - Reserved. */
+        RT_GCC_EXTENSION uint64_t   u40Base : 40;       /**< Bits 51:12 - PPRLogBase: Peripheral Page Request Log Base Address. */
+        RT_GCC_EXTENSION uint64_t   u4Rsvd0 : 4;        /**< Bits 55:52 - Reserved. */
+        RT_GCC_EXTENSION uint64_t   u4Len : 4;          /**< Bits 59:56 - PPRLogLen: Peripheral Page Request Log Length. */
+        RT_GCC_EXTENSION uint64_t   u4Rsvd1 : 4;        /**< Bits 63:60 - Reserved. */
+    } n;
+    /** The 64-bit unsigned integer view. */
+    uint64_t    u64;
+} PPR_LOG_BAR_T;
+AssertCompileSize(PPR_LOG_BAR_T, 8);
+#define IOMMU_PPR_LOG_BAR_VALID_MASK    UINT64_C(0x0f0ffffffffff000)
+
+/**
+ * IOMMU Hardware Event Upper Register (MMIO).
+ * In accordance with the AMD spec.
+ */
+typedef union
+{
+    struct
+    {
+        RT_GCC_EXTENSION uint64_t   u60FirstOperand : 60;   /**< Bits 59:0  - First event code dependent operand. */
+        RT_GCC_EXTENSION uint64_t   u4EvtCode : 4;          /**< Bits 63:60 - Event Code. */
+    } n;
+    /** The 64-bit unsigned integer view. */
+    uint64_t    u64;
+} IOMMU_HW_EVT_HI_T;
+AssertCompileSize(IOMMU_HW_EVT_HI_T, 8);
+
+/**
+ * IOMMU Hardware Event Lower Register (MMIO).
+ * In accordance with the AMD spec.
+ */
+typedef uint64_t IOMMU_HW_EVT_LO_T;
+
+/**
+ * IOMMU Hardware Event Status (MMIO).
+ * In accordance with the AMD spec.
+ */
+typedef union
+{
+    struct
+    {
+        uint32_t   u1Valid : 1;     /**< Bit 0      - HEV: Hardware Event Valid. */
+        uint32_t   u1Overflow : 1;  /**< Bit 1      - HEO: Hardware Event Overflow. */
+        uint32_t   u30Rsvd0 : 30;   /**< Bits 31:2  - Reserved. */
+        uint32_t   u32Rsvd0;        /**< Bits 63:32 - Reserved. */
+    } n;
+    /** The 64-bit unsigned integer view. */
+    uint64_t    u64;
+} IOMMU_HW_EVT_STATUS_T;
+AssertCompileSize(IOMMU_HW_EVT_STATUS_T, 8);
+#define IOMMU_HW_EVT_STATUS_VALID_MASK      UINT64_C(0x0000000000000003)
+
+/**
+ * Guest Virtual-APIC Log Base Address Register (MMIO).
+ * In accordance with the AMD spec.
+ */
+typedef union
+{
+    struct
+    {
+        RT_GCC_EXTENSION uint64_t   u12Rsvd0 : 12;  /**< Bit 11:0   - Reserved. */
+        RT_GCC_EXTENSION uint64_t   u40Base : 40;   /**< Bits 51:12 - GALogBase: Guest Virtual-APIC Log Base Address. */
+        RT_GCC_EXTENSION uint64_t   u4Rsvd0 : 4;    /**< Bits 55:52 - Reserved. */
+        RT_GCC_EXTENSION uint64_t   u4Len : 4;      /**< Bits 59:56 - GALogLen: Guest Virtual-APIC Log Length. */
+        RT_GCC_EXTENSION uint64_t   u4Rsvd1 : 4;    /**< Bits 63:60 - Reserved. */
+    } n;
+    /** The 64-bit unsigned integer view. */
+    uint64_t    u64;
+} GALOG_BAR_T;
+AssertCompileSize(GALOG_BAR_T, 8);
+
+/**
+ * Guest Virtual-APIC Log Tail Address Register (MMIO).
+ * In accordance with the AMD spec.
+ */
+typedef union
+{
+    struct
+    {
+        RT_GCC_EXTENSION uint64_t   u3Rsvd0 : 3;            /**< Bits 2:0   - Reserved. */
+        RT_GCC_EXTENSION uint64_t   u40GALogTailAddr : 48;  /**< Bits 51:3  - GATAddr: Guest Virtual-APIC Tail Log Address. */
+        RT_GCC_EXTENSION uint64_t   u11Rsvd1 : 11;          /**< Bits 63:52 - Reserved. */
+    } n;
+    /** The 64-bit unsigned integer view. */
+    uint64_t    u64;
+} GALOG_TAIL_ADDR_T;
+AssertCompileSize(GALOG_TAIL_ADDR_T, 8);
+
+/**
+ * PPR Log B Base Address Register (MMIO).
+ * In accordance with the AMD spec.
+ * Currently identical to PPR_LOG_BAR_T.
+ */
+typedef PPR_LOG_BAR_T       PPR_LOG_B_BAR_T;
+
+/**
+ * Event Log B Base Address Register (MMIO).
+ * In accordance with the AMD spec.
+ * Currently identical to EVT_LOG_BAR_T.
+ */
+typedef EVT_LOG_BAR_T       EVT_LOG_B_BAR_T;
+
+/**
+ * Device-specific Feature Extension (DSFX) Register (MMIO).
+ * In accordance with the AMD spec.
+ */
+typedef union
+{
+    struct
+    {
+        uint32_t    u24DevSpecFeat : 24;     /**< Bits 23:0  - DevSpecificFeatSupp: Implementation specific features. */
+        uint32_t    u4RevMinor : 4;          /**< Bits 27:24 - RevMinor: Minor revision identifier. */
+        uint32_t    u4RevMajor : 4;          /**< Bits 31:28 - RevMajor: Major revision identifier. */
+        uint32_t    u32Rsvd0;                /**< Bits 63:32 - Reserved.*/
+    } n;
+    /** The 64-bit unsigned integer view. */
+    uint64_t    u64;
+} DEV_SPECIFIC_FEAT_T;
+AssertCompileSize(DEV_SPECIFIC_FEAT_T, 8);
+
+/**
+ * Device-specific Control Extension (DSCX) Register (MMIO).
+ * In accordance with the AMD spec.
+ */
+typedef union
+{
+    struct
+    {
+        uint32_t    u24DevSpecCtrl : 24;     /**< Bits 23:0  - DevSpecificFeatCntrl: Implementation specific control. */
+        uint32_t    u4RevMinor : 4;          /**< Bits 27:24 - RevMinor: Minor revision identifier. */
+        uint32_t    u4RevMajor : 4;          /**< Bits 31:28 - RevMajor: Major revision identifier. */
+        uint32_t    u32Rsvd0;                /**< Bits 63:32 - Reserved.*/
+    } n;
+    /** The 64-bit unsigned integer view. */
+    uint64_t    u64;
+} DEV_SPECIFIC_CTRL_T;
+AssertCompileSize(DEV_SPECIFIC_CTRL_T, 8);
+
+/**
+ * Device-specific Status Extension (DSSX) Register (MMIO).
+ * In accordance with the AMD spec.
+ */
+typedef union
+{
+    struct
+    {
+        uint32_t    u24DevSpecStatus : 24;      /**< Bits 23:0  - DevSpecificFeatStatus: Implementation specific status. */
+        uint32_t    u4RevMinor : 4;             /**< Bits 27:24 - RevMinor: Minor revision identifier. */
+        uint32_t    u4RevMajor : 4;             /**< Bits 31:28 - RevMajor: Major revision identifier. */
+        uint32_t    u32Rsvd0;                   /**< Bits 63:32 - Reserved.*/
+    } n;
+    /** The 64-bit unsigned integer view. */
+    uint64_t    u64;
+} DEV_SPECIFIC_STATUS_T;
+AssertCompileSize(DEV_SPECIFIC_STATUS_T, 8);
+
+/**
+ * MSI Information Register 0 and 1 (PCI) / MSI Vector Register 0 and 1 (MMIO).
+ * In accordance with the AMD spec.
+ */
+typedef union
+{
+    struct
+    {
+        uint32_t    u5MsiNumEvtLog : 5;     /**< Bits 4:0   - MsiNum: Event Log MSI message number. */
+        uint32_t    u3GstVirtAddrSize: 3;   /**< Bits 7:5   - GVAsize: Guest Virtual Address Size. */
+        uint32_t    u7PhysAddrSize : 7;     /**< Bits 14:8  - PAsize: Physical Address Size. */
+        uint32_t    u7VirtAddrSize : 7;     /**< Bits 21:15 - VAsize: Virtual Address Size. */
+        uint32_t    u1HtAtsResv: 1;         /**< Bit  22    - HtAtsResv: HyperTransport ATS Response Address range Reserved. */
+        uint32_t    u4Rsvd0 : 4;            /**< Bits 26:23 - Reserved. */
+        uint32_t    u5MsiNumPpr : 5;        /**< Bits 31:27 - MsiNumPPR: Peripheral Page Request MSI message number. */
+        uint32_t    u5MsiNumGa : 5;         /**< Bits 36:32 - MsiNumGa: MSI message number for guest virtual-APIC log. */
+        uint32_t    u27Rsvd0: 27;           /**< Bits 63:37 - Reserved. */
+    } n;
+    /** The 32-bit unsigned integer view. */
+    uint32_t    au32[2];
+    /** The 64-bit unsigned integer view. */
+    uint64_t    u64;
+} MSI_MISC_INFO_T;
+AssertCompileSize(MSI_MISC_INFO_T, 8);
+/** MSI Vector Register 0 and 1 (MMIO). */
+typedef MSI_MISC_INFO_T       MSI_VECTOR_T;
+
+/**
+ * MSI Capability Header Register (PCI + MMIO).
+ * In accordance with the AMD spec.
+ */
+typedef union
+{
+    struct
+    {
+        uint32_t    u8MsiCapId : 8;         /**< Bits 7:0   - MsiCapId: Capability ID. */
+        uint32_t    u8MsiCapPtr : 8;        /**< Bits 15:8  - MsiCapPtr: Pointer (PCI config offset) to the next capability. */
+        uint32_t    u1MsiEnable : 1;        /**< Bit  16    - MsiEn: Message Signal Interrupt Enable. */
+        uint32_t    u3MsiMultiMessCap : 3;  /**< Bits 19:17 - MsiMultMessCap: MSI Multi-Message Capability. */
+        uint32_t    u3MsiMultiMessEn : 3;   /**< Bits 22:20 - MsiMultMessEn: MSI Multi-Message Enable. */
+        uint32_t    u1Msi64BitEn : 1;       /**< Bit  23    - Msi64BitEn: MSI 64-bit Enable. */
+        uint32_t    u8Rsvd0 : 8;            /**< Bits 31:24 - Reserved. */
+    } n;
+    /** The 32-bit unsigned integer view. */
+    uint32_t    u32;
+} MSI_CAP_HDR_T;
+AssertCompileSize(MSI_CAP_HDR_T, 4);
+#define IOMMU_MSI_CAP_HDR_MSI_EN_MASK       RT_BIT(16)
+
+/**
+ * MSI Mapping Capability Header Register (PCI + MMIO).
+ * In accordance with the AMD spec.
+ */
+typedef union
+{
+    struct
+    {
+        uint32_t    u8MsiMapCapId : 8;  /**< Bits 7:0   - MsiMapCapId: MSI Map capability ID. */
+        uint32_t    u8Rsvd0 : 8;        /**< Bits 15:8  - Reserved. */
+        uint32_t    u1MsiMapEn : 1;     /**< Bit  16    - MsiMapEn: MSI Map enable. */
+        uint32_t    u1MsiMapFixed : 1;  /**< Bit  17    - MsiMapFixd: MSI Map fixed. */
+        uint32_t    u9Rsvd0 : 9;        /**< Bits 26:18 - Reserved. */
+        uint32_t    u5MapCapType : 5;   /**< Bits 31:27 - MsiMapCapType: MSI Mapping capability type. */
+    } n;
+    /** The 32-bit unsigned integer view. */
+    uint32_t    u32;
+} MSI_MAP_CAP_HDR_T;
+AssertCompileSize(MSI_MAP_CAP_HDR_T, 4);
+
+/**
+ * Performance Optimization Control Register (MMIO).
+ * In accordance with the AMD spec.
+ */
+typedef union
+{
+    struct
+    {
+        uint32_t    u13Rsvd0 : 13;      /**< Bits 12:0  - Reserved. */
+        uint32_t    u1PerfOptEn : 1;    /**< Bit  13    - PerfOptEn: Performance Optimization Enable. */
+        uint32_t    u17Rsvd0 : 18;      /**< Bits 31:14 - Reserved. */
+    } n;
+    /** The 32-bit unsigned integer view. */
+    uint32_t    u32;
+} IOMMU_PERF_OPT_CTRL_T;
+AssertCompileSize(IOMMU_PERF_OPT_CTRL_T, 4);
+
+/**
+ * XT (x2APIC) IOMMU General Interrupt Control Register (MMIO).
+ * In accordance with the AMD spec.
+ */
+typedef union
+{
+    struct
+    {
+        uint32_t    u2Rsvd0 : 2;                    /**< Bits 1:0   - Reserved.*/
+        uint32_t    u1X2ApicIntrDstMode : 1;        /**< Bit  2     - Destination Mode for general interrupt.*/
+        uint32_t    u4Rsvd0 : 4;                    /**< Bits 7:3   - Reserved.*/
+        uint32_t    u24X2ApicIntrDstLo : 24;        /**< Bits 31:8  - Destination for general interrupt (Lo).*/
+        uint32_t    u8X2ApicIntrVector : 8;         /**< Bits 39:32 - Vector for general interrupt.*/
+        uint32_t    u1X2ApicIntrDeliveryMode : 1;   /**< Bit  40    - Delivery Mode for general interrupt.*/
+        uint32_t    u15Rsvd0 : 15;                  /**< Bits 55:41 - Reserved.*/
+        uint32_t    u7X2ApicIntrDstHi : 7;          /**< Bits 63:56 - Destination for general interrupt (Hi) .*/
+    } n;
+    /** The 64-bit unsigned integer view. */
+    uint64_t    u64;
+} IOMMU_XT_GEN_INTR_CTRL_T;
+AssertCompileSize(IOMMU_XT_GEN_INTR_CTRL_T, 8);
+
+/**
+ * XT (x2APIC) IOMMU General Interrupt Control Register (MMIO).
+ * In accordance with the AMD spec.
+ */
+typedef union
+{
+    struct
+    {
+        uint32_t    u2Rsvd0 : 2;                    /**< Bits 1:0   - Reserved.*/
+        uint32_t    u1X2ApicIntrDstMode : 1;        /**< Bit  2     - Destination Mode for the interrupt.*/
+        uint32_t    u4Rsvd0 : 4;                    /**< Bits 7:3   - Reserved.*/
+        uint32_t    u24X2ApicIntrDstLo : 24;        /**< Bits 31:8  - Destination for the interrupt (Lo).*/
+        uint32_t    u8X2ApicIntrVector : 8;         /**< Bits 39:32 - Vector for the interrupt.*/
+        uint32_t    u1X2ApicIntrDeliveryMode : 1;   /**< Bit  40    - Delivery Mode for the interrupt.*/
+        uint32_t    u15Rsvd0 : 15;                  /**< Bits 55:41 - Reserved.*/
+        uint32_t    u7X2ApicIntrDstHi : 7;          /**< Bits 63:56 - Destination for the interrupt (Hi) .*/
+    } n;
+    /** The 64-bit unsigned integer view. */
+    uint64_t    u64;
+} IOMMU_XT_INTR_CTRL_T;
+AssertCompileSize(IOMMU_XT_INTR_CTRL_T, 8);
+
+/**
+ * XT (x2APIC) IOMMU PPR Interrupt Control Register (MMIO).
+ * In accordance with the AMD spec.
+ * Currently identical to IOMMU_XT_INTR_CTRL_T.
+ */
+typedef IOMMU_XT_INTR_CTRL_T    IOMMU_XT_PPR_INTR_CTRL_T;
+
+/**
+ * XT (x2APIC) IOMMU GA (Guest Address) Log Control Register (MMIO).
+ * In accordance with the AMD spec.
+ * Currently identical to IOMMU_XT_INTR_CTRL_T.
+ */
+typedef IOMMU_XT_INTR_CTRL_T    IOMMU_XT_GALOG_INTR_CTRL_T;
+
+/**
+ * Memory Access and Routing Control (MARC) Aperture Base Register (MMIO).
+ * In accordance with the AMD spec.
+ */
+typedef union
+{
+    struct
+    {
+        RT_GCC_EXTENSION uint64_t   u12Rsvd0 : 12;          /**< Bits 11:0  - Reserved. */
+        RT_GCC_EXTENSION uint64_t   u40MarcBaseAddr : 40;   /**< Bits 51:12 - MarcBaseAddr: MARC Aperture Base Address. */
+        RT_GCC_EXTENSION uint64_t   u12Rsvd1 : 12;          /**< Bits 63:52 - Reserved. */
+    } n;
+    /** The 64-bit unsigned integer view. */
+    uint64_t    u64;
+} MARC_APER_BAR_T;
+AssertCompileSize(MARC_APER_BAR_T, 8);
+
+/**
+ * Memory Access and Routing Control (MARC) Relocation Register (MMIO).
+ * In accordance with the AMD spec.
+ */
+typedef union
+{
+    struct
+    {
+        RT_GCC_EXTENSION uint64_t   u1RelocEn : 1;          /**< Bit  0     - RelocEn: Relocation Enabled. */
+        RT_GCC_EXTENSION uint64_t   u1ReadOnly : 1;         /**< Bit  1     - ReadOnly: Whether only read-only acceses allowed. */
+        RT_GCC_EXTENSION uint64_t   u10Rsvd0 : 10;          /**< Bits 11:2  - Reserved. */
+        RT_GCC_EXTENSION uint64_t   u40MarcRelocAddr : 40;  /**< Bits 51:12 - MarcRelocAddr: MARC Aperture Relocation Address. */
+        RT_GCC_EXTENSION uint64_t   u12Rsvd1 : 12;          /**< Bits 63:52 - Reserved. */
+    } n;
+    /** The 64-bit unsigned integer view. */
+    uint64_t    u64;
+} MARC_APER_RELOC_T;
+AssertCompileSize(MARC_APER_RELOC_T, 8);
+
+/**
+ * Memory Access and Routing Control (MARC) Length Register (MMIO).
+ * In accordance with the AMD spec.
+ */
+typedef union
+{
+    struct
+    {
+        RT_GCC_EXTENSION uint64_t   u12Rsvd0 : 12;          /**< Bits 11:0  - Reserved. */
+        RT_GCC_EXTENSION uint64_t   u40MarcLength : 40;     /**< Bits 51:12 - MarcLength: MARC Aperture Length. */
+        RT_GCC_EXTENSION uint64_t   u12Rsvd1 : 12;          /**< Bits 63:52 - Reserved. */
+    } n;
+    /** The 64-bit unsigned integer view. */
+    uint64_t    u64;
+} MARC_APER_LEN_T;
+
+/**
+ * Memory Access and Routing Control (MARC) Aperture Register.
+ * This combines other registers to match the MMIO layout for convenient access.
+ */
+typedef struct
+{
+    MARC_APER_BAR_T     Base;
+    MARC_APER_RELOC_T   Reloc;
+    MARC_APER_LEN_T     Length;
+} MARC_APER_T;
+AssertCompileSize(MARC_APER_T, 24);
+
+/**
+ * IOMMU Reserved Register (MMIO).
+ * In accordance with the AMD spec.
+ * This register is reserved for hardware use (although RW?).
+ */
+typedef uint64_t    IOMMU_RSVD_REG_T;
+
+/**
+ * Command Buffer Head Pointer Register (MMIO).
+ * In accordance with the AMD spec.
+ */
+typedef union
+{
+    struct
+    {
+        uint32_t    off;            /**< Bits 31:0  - Buffer pointer (offset; 16 byte aligned, 512 KB max). */
+        uint32_t    u32Rsvd0;       /**< Bits 63:32 - Reserved. */
+    } n;
+    /** The 32-bit unsigned integer view. */
+    uint32_t    au32[2];
+    /** The 64-bit unsigned integer view. */
+    uint64_t    u64;
+} CMD_BUF_HEAD_PTR_T;
+AssertCompileSize(CMD_BUF_HEAD_PTR_T, 8);
+#define IOMMU_CMD_BUF_HEAD_PTR_VALID_MASK       UINT64_C(0x000000000007fff0)
+
+/**
+ * Command Buffer Tail Pointer Register (MMIO).
+ * In accordance with the AMD spec.
+ * Currently identical to CMD_BUF_HEAD_PTR_T.
+ */
+typedef CMD_BUF_HEAD_PTR_T    CMD_BUF_TAIL_PTR_T;
+#define IOMMU_CMD_BUF_TAIL_PTR_VALID_MASK       IOMMU_CMD_BUF_HEAD_PTR_VALID_MASK
+
+/**
+ * Event Log Head Pointer Register (MMIO).
+ * In accordance with the AMD spec.
+ * Currently identical to CMD_BUF_HEAD_PTR_T.
+ */
+typedef CMD_BUF_HEAD_PTR_T    EVT_LOG_HEAD_PTR_T;
+#define IOMMU_EVT_LOG_HEAD_PTR_VALID_MASK       IOMMU_CMD_BUF_HEAD_PTR_VALID_MASK
+
+/**
+ * Event Log Tail Pointer Register (MMIO).
+ * In accordance with the AMD spec.
+ * Currently identical to CMD_BUF_HEAD_PTR_T.
+ */
+typedef CMD_BUF_HEAD_PTR_T    EVT_LOG_TAIL_PTR_T;
+#define IOMMU_EVT_LOG_TAIL_PTR_VALID_MASK       IOMMU_CMD_BUF_HEAD_PTR_VALID_MASK
+
+
+/**
+ * IOMMU Status Register (MMIO).
+ * In accordance with the AMD spec.
+ */
+typedef union
+{
+    struct
+    {
+        uint32_t    u1EvtOverflow : 1;          /**< Bit  0     - EventOverflow: Event log overflow. */
+        uint32_t    u1EvtLogIntr : 1;           /**< Bit  1     - EventLogInt: Event log interrupt. */
+        uint32_t    u1CompWaitIntr : 1;         /**< Bit  2     - ComWaitInt: Completion wait interrupt . */
+        uint32_t    u1EvtLogRunning : 1;        /**< Bit  3     - EventLogRun: Event logging is running. */
+        uint32_t    u1CmdBufRunning : 1;        /**< Bit  4     - CmdBufRun: Command buffer is running. */
+        uint32_t    u1PprOverflow : 1;          /**< Bit  5     - PprOverflow: Peripheral Page Request Log (PPR) overflow. */
+        uint32_t    u1PprIntr : 1;              /**< Bit  6     - PprInt: PPR interrupt. */
+        uint32_t    u1PprLogRunning : 1;        /**< Bit  7     - PprLogRun: PPR logging is running. */
+        uint32_t    u1GstLogRunning : 1;        /**< Bit  8     - GALogRun: Guest virtual-APIC logging is running. */
+        uint32_t    u1GstLogOverflow : 1;       /**< Bit  9     - GALOverflow: Guest virtual-APIC log overflow. */
+        uint32_t    u1GstLogIntr : 1;           /**< Bit  10    - GAInt: Guest virtual-APIC log interrupt. */
+        uint32_t    u1PprOverflowB : 1;         /**< Bit  11    - PprOverflowB: PPR log B overflow. */
+        uint32_t    u1PprLogActive : 1;         /**< Bit  12    - PprLogActive: PPR log A is active. */
+        uint32_t    u2Rsvd0 : 2;                /**< Bits 14:13 - Reserved. */
+        uint32_t    u1EvtOverflowB : 1;         /**< Bit  15    - EvtOverflowB: Event log B overflow. */
+        uint32_t    u1EvtLogActive : 1;         /**< Bit  16    - EvtLogActive: Event log A active. */
+        uint32_t    u1PprOverflowEarlyB : 1;    /**< Bit  17    - PprOverflowEarlyB: PPR log B overflow early warning. */
+        uint32_t    u1PprOverflowEarly : 1;     /**< Bit  18    - PprOverflowEarly: PPR log overflow early warning. */
+        uint32_t    u13Rsvd0 : 13;              /**< Bits 31:19 - Reserved. */
+        uint32_t    u32Rsvd0;                   /**< Bits 63:32 - Reserved . */
+    } n;
+    /** The 32-bit unsigned integer view. */
+    uint32_t    au32[2];
+    /** The 64-bit unsigned integer view. */
+    uint64_t    u64;
+} IOMMU_STATUS_T;
+AssertCompileSize(IOMMU_STATUS_T, 8);
+#define IOMMU_STATUS_VALID_MASK     UINT64_C(0x0000000000079fff)
+#define IOMMU_STATUS_RW1C_MASK      UINT64_C(0x0000000000068e67)
+
+/**
+ * PPR Log Head Pointer Register (MMIO).
+ * In accordance with the AMD spec.
+ * Currently identical to CMD_BUF_HEAD_PTR_T.
+ */
+typedef CMD_BUF_HEAD_PTR_T      PPR_LOG_HEAD_PTR_T;
+
+/**
+ * PPR Log Tail Pointer Register (MMIO).
+ * In accordance with the AMD spec.
+ * Currently identical to CMD_BUF_HEAD_PTR_T.
+ */
+typedef CMD_BUF_HEAD_PTR_T      PPR_LOG_TAIL_PTR_T;
+
+/**
+ * Guest Virtual-APIC Log Head Pointer Register (MMIO).
+ * In accordance with the AMD spec.
+ */
+typedef union
+{
+    struct
+    {
+        uint32_t    u2Rsvd0 : 2;            /**< Bits 2:0   - Reserved. */
+        uint32_t    u12GALogPtr : 12;       /**< Bits 15:3  - Guest Virtual-APIC Log Head or Tail Pointer. */
+        uint32_t    u16Rsvd0 : 16;          /**< Bits 31:16 - Reserved. */
+        uint32_t    u32Rsvd0;               /**< Bits 63:32 - Reserved. */
+    } n;
+    /** The 32-bit unsigned integer view. */
+    uint32_t    au32[2];
+    /** The 64-bit unsigned integer view. */
+    uint64_t    u64;
+} GALOG_HEAD_PTR_T;
+AssertCompileSize(GALOG_HEAD_PTR_T, 8);
+
+/**
+ * Guest Virtual-APIC Log Tail Pointer Register (MMIO).
+ * In accordance with the AMD spec.
+ * Currently identical to GALOG_HEAD_PTR_T.
+ */
+typedef GALOG_HEAD_PTR_T        GALOG_TAIL_PTR_T;
+
+/**
+ * PPR Log B Head Pointer Register (MMIO).
+ * In accordance with the AMD spec.
+ * Currently identical to CMD_BUF_HEAD_PTR_T.
+ */
+typedef CMD_BUF_HEAD_PTR_T      PPR_LOG_B_HEAD_PTR_T;
+
+/**
+ * PPR Log B Tail Pointer Register (MMIO).
+ * In accordance with the AMD spec.
+ * Currently identical to CMD_BUF_HEAD_PTR_T.
+ */
+typedef CMD_BUF_HEAD_PTR_T      PPR_LOG_B_TAIL_PTR_T;
+
+/**
+ * Event Log B Head Pointer Register (MMIO).
+ * In accordance with the AMD spec.
+ * Currently identical to CMD_BUF_HEAD_PTR_T.
+ */
+typedef CMD_BUF_HEAD_PTR_T      EVT_LOG_B_HEAD_PTR_T;
+
+/**
+ * Event Log B Tail Pointer Register (MMIO).
+ * In accordance with the AMD spec.
+ * Currently identical to CMD_BUF_HEAD_PTR_T.
+ */
+typedef CMD_BUF_HEAD_PTR_T      EVT_LOG_B_TAIL_PTR_T;
+
+/**
+ * PPR Log Auto Response Register (MMIO).
+ * In accordance with the AMD spec.
+ */
+typedef union
+{
+    struct
+    {
+        uint32_t    u4AutoRespCode : 4;     /**< Bits 3:0   - PprAutoRespCode: PPR log Auto Response Code. */
+        uint32_t    u1AutoRespMaskGen : 1;  /**< Bit  4     - PprAutoRespMaskGn: PPR log Auto Response Mask Gen. */
+        uint32_t    u27Rsvd0 : 27;          /**< Bits 31:5  - Reserved. */
+        uint32_t    u32Rsvd0;               /**< Bits 63:32 - Reserved.*/
+    } n;
+    /** The 32-bit unsigned integer view. */
+    uint32_t    au32[2];
+    /** The 64-bit unsigned integer view. */
+    uint64_t    u64;
+} PPR_LOG_AUTO_RESP_T;
+AssertCompileSize(PPR_LOG_AUTO_RESP_T, 8);
+
+/**
+ * PPR Log Overflow Early Indicator Register (MMIO).
+ * In accordance with the AMD spec.
+ */
+typedef union
+{
+    struct
+    {
+        uint32_t    u15Threshold : 15;  /**< Bits 14:0  - PprOvrflwEarlyThreshold: Overflow early indicator threshold. */
+        uint32_t    u15Rsvd0 : 15;      /**< Bits 29:15 - Reserved. */
+        uint32_t    u1IntrEn : 1;       /**< Bit  30    - PprOvrflwEarlyIntEn: Overflow early indicator interrupt enable. */
+        uint32_t    u1Enable : 1;       /**< Bit  31    - PprOvrflwEarlyEn: Overflow early indicator enable. */
+        uint32_t    u32Rsvd0;           /**< Bits 63:32 - Reserved. */
+    } n;
+    /** The 32-bit unsigned integer view. */
+    uint32_t    au32[2];
+    /** The 64-bit unsigned integer view. */
+    uint64_t    u64;
+} PPR_LOG_OVERFLOW_EARLY_T;
+AssertCompileSize(PPR_LOG_OVERFLOW_EARLY_T, 8);
+
+/**
+ * PPR Log B Overflow Early Indicator Register (MMIO).
+ * In accordance with the AMD spec.
+ * Currently identical to PPR_LOG_OVERFLOW_EARLY_T.
+ */
+typedef PPR_LOG_OVERFLOW_EARLY_T        PPR_LOG_B_OVERFLOW_EARLY_T;
+
+/**
+ * ILLEGAL_DEV_TABLE_ENTRY Event Types.
+ * In accordance with the AMD spec.
+ */
+typedef enum EVT_ILLEGAL_DTE_TYPE_T
+{
+    kIllegalDteType_RsvdNotZero = 0,
+    kIllegalDteType_RsvdIntTabLen,
+    kIllegalDteType_RsvdIoCtl,
+    kIllegalDteType_RsvdIntCtl
+} EVT_ILLEGAL_DTE_TYPE_T;
+
+/**
+ * ILLEGAL_DEV_TABLE_ENTRY Event Types.
+ * In accordance with the AMD spec.
+ */
+typedef enum EVT_IO_PAGE_FAULT_TYPE_T
+{
+    /* Memory transaction. */
+    kIoPageFaultType_DteRsvdPagingMode = 0,
+    kIoPageFaultType_PteInvalidPageSize,
+    kIoPageFaultType_PteInvalidLvlEncoding,
+    kIoPageFaultType_SkippedLevelIovaNotZero,
+    kIoPageFaultType_PteRsvdNotZero,
+    kIoPageFaultType_PteValidNotSet,
+    kIoPageFaultType_DteTranslationDisabled,
+    kIoPageFaultType_PasidInvalidRange,
+    kIoPageFaultType_PermDenied,
+    kIoPageFaultType_UserSupervisor,
+    /* Interrupt remapping */
+    kIoPageFaultType_IrteAddrInvalid,
+    kIoPageFaultType_IrteRsvdNotZero,
+    kIoPageFaultType_IrteRemapEn,
+    kIoPageFaultType_IrteRsvdIntType,
+    kIoPageFaultType_IntrReqAborted,
+    kIoPageFaultType_IntrWithPasid,
+    kIoPageFaultType_SmiFilterMismatch,
+    /* Memory transaction or interrupt remapping. */
+    kIoPageFaultType_DevId_Invalid
+} EVT_IO_PAGE_FAULT_TYPE_T;
+
+/**
+ * IOTLB_INV_TIMEOUT Event Types.
+ * In accordance with the AMD spec.
+ */
+typedef enum EVT_IOTLB_INV_TIMEOUT_TYPE_T
+{
+    InvTimeoutType_NoResponse = 0
+} EVT_IOTLB_INV_TIMEOUT_TYPE_T;
+
+/**
+ * INVALID_DEVICE_REQUEST Event Types.
+ * In accordance with the AMD spec.
+ */
+typedef enum EVT_INVALID_DEV_REQ_TYPE_T
+{
+    /* Access. */
+    kInvalidDevReqType_ReadOrNonPostedWrite = 0,
+    kInvalidDevReqType_PretranslatedTransaction,
+    kInvalidDevReqType_PortIo,
+    kInvalidDevReqType_SysMgt,
+    kInvalidDevReqType_IntrRange,
+    kInvalidDevReqType_RsvdIntrRange,
+    kInvalidDevReqType_SysMgtAddr,
+    /* Translation Request. */
+    kInvalidDevReqType_TrAccessInvalid,
+    kInvalidDevReqType_TrDisabled,
+    kInvalidDevReqType_DevIdInvalid,
+} EVT_INVALID_DEV_REQ_TYPE_T;
+
+/**
+ * INVALID_PPR_REQUEST Event Types.
+ * In accordance with the AMD spec.
+ */
+typedef enum EVT_INVALID_PPR_REQ_TYPE_T
+{
+    kInvalidPprReqType_PriNotSupported,
+    kInvalidPprReqType_GstTranslateDisabled
+} EVT_INVALID_PPR_REQ_TYPE_T;
+
+
+/** @name IVRS format revision field.
+ * In accordance with the AMD spec.
+ * @{ */
+/** Fixed: Supports only pre-assigned device IDs and type 10h and 11h IVHD
+ *  blocks. */
+#define ACPI_IVRS_FMT_REV_FIXED                         0x1
+/** Mixed: Supports pre-assigned and ACPI HID device naming and all IVHD blocks. */
+#define ACPI_IVRS_FMT_REV_MIXED                         0x2
+/** @} */
+
+/** @name IVHD special device entry variety field.
+ * In accordance with the AMD spec.
+ * @{ */
+/** I/O APIC. */
+#define ACPI_IVHD_VARIETY_IOAPIC                        0x1
+/** HPET. */
+#define ACPI_IVHD_VARIETY_HPET                          0x2
+/** @} */
+
+/** @name IVHD device entry type codes.
+ * In accordance with the AMD spec.
+ * @{ */
+/** Reserved. */
+#define ACPI_IVHD_DEVENTRY_TYPE_RSVD                    0x0
+/** All: DTE setting applies to all Device IDs. */
+#define ACPI_IVHD_DEVENTRY_TYPE_ALL                     0x1
+/** Select: DTE setting applies to the device specified in DevId field. */
+#define ACPI_IVHD_DEVENTRY_TYPE_SELECT                  0x2
+/** Start of range: DTE setting applies to all devices from start of range specified
+ *  by the DevId field. */
+#define ACPI_IVHD_DEVENTRY_TYPE_START_RANGE             0x3
+/** End of range: DTE setting from previous type 3 entry applies to all devices
+ *  incl. DevId specified by this entry. */
+#define ACPI_IVHD_DEVENTRY_TYPE_END_RANGE               0x4
+/** @} */
+
+/** @name IVHD DTE (Device Table Entry) Settings.
+ * In accordance with the AMD spec.
+ * @{ */
+/** INITPass: Identifies a device able to assert INIT interrupts. */
+#define ACPI_IVHD_DTE_INIT_PASS_SHIFT                   0
+#define ACPI_IVHD_DTE_INIT_PASS_MASK                    UINT8_C(0x01)
+/** EIntPass: Identifies a device able to assert ExtInt interrupts. */
+#define ACPI_IVHD_DTE_EXTINT_PASS_SHIFT                 1
+#define ACPI_IVHD_DTE_EXTINT_PASS_MASK                  UINT8_C(0x02)
+/** NMIPass: Identifies a device able to assert NMI interrupts. */
+#define ACPI_IVHD_DTE_NMI_PASS_SHIFT                    2
+#define ACPI_IVHD_DTE_NMI_PASS_MASK                     UINT8_C(0x04)
+/** Bit 3 reserved. */
+#define ACPI_IVHD_DTE_RSVD_3_SHIFT                      3
+#define ACPI_IVHD_DTE_RSVD_3_MASK                       UINT8_C(0x08)
+/** SysMgt: Identifies a device able to assert system management messages. */
+#define ACPI_IVHD_DTE_SYS_MGT_SHIFT                     4
+#define ACPI_IVHD_DTE_SYS_MGT_MASK                      UINT8_C(0x30)
+/** Lint0Pass: Identifies a device able to assert LINT0 interrupts. */
+#define ACPI_IVHD_DTE_LINT0_PASS_SHIFT                  6
+#define ACPI_IVHD_DTE_LINT0_PASS_MASK                   UINT8_C(0x40)
+/** Lint0Pass: Identifies a device able to assert LINT1 interrupts. */
+#define ACPI_IVHD_DTE_LINT1_PASS_SHIFT                  7
+#define ACPI_IVHD_DTE_LINT1_PASS_MASK                   UINT8_C(0x80)
+RT_BF_ASSERT_COMPILE_CHECKS(ACPI_IVHD_DTE_, UINT8_C(0), UINT8_MAX,
+                            (INIT_PASS, EXTINT_PASS, NMI_PASS, RSVD_3, SYS_MGT, LINT0_PASS, LINT1_PASS));
+/** @} */
+
+/**
+ * AMD IOMMU: IVHD (I/O Virtualization Hardware Definition) Device Entry (4-byte).
+ * In accordance with the AMD spec.
+ */
+#pragma pack(1)
+typedef struct ACPIIVHDDEVENTRY4
+{
+    uint8_t         u8DevEntryType;     /**< Device entry type. */
+    uint16_t        u16DevId;           /**< Device ID. */
+    uint8_t         u8DteSetting;       /**< DTE (Device Table Entry) setting. */
+} ACPIIVHDDEVENTRY4;
+#pragma pack()
+AssertCompileSize(ACPIIVHDDEVENTRY4, 4);
+
+/**
+ * AMD IOMMU: IVHD (I/O Virtualization Hardware Definition) Device Entry (8-byte).
+ * In accordance with the AMD spec.
+ */
+#pragma pack(1)
+typedef struct ACPIIVHDDEVENTRY8
+{
+    uint8_t         u8DevEntryType;     /**< Device entry type. */
+    union
+    {
+        /** Reserved: When u8DevEntryType is 0x40, 0x41, 0x44 or 0x45 (or 0x49-0x7F). */
+        struct
+        {
+            uint8_t     au8Rsvd0[7];        /**< Reserved (MBZ). */
+        } rsvd;
+        /** Alias Select: When u8DevEntryType is 0x42 or 0x43. */
+        struct
+        {
+            uint16_t    u16DevIdA;          /**< Device ID A. */
+            uint8_t     u8DteSetting;       /**< DTE (Device Table Entry) setting. */
+            uint8_t     u8Rsvd0;            /**< Reserved (MBZ). */
+            uint16_t    u16DevIdB;          /**< Device ID B. */
+            uint8_t     u8Rsvd1;            /**< Reserved (MBZ). */
+        } alias;
+        /** Extended Select: When u8DevEntryType is 0x46 or 0x47. */
+        struct
+        {
+            uint16_t    u16DevId;           /**< Device ID. */
+            uint8_t     u8DteSetting;       /**< DTE (Device Table Entry) setting. */
+            uint32_t    u32ExtDteSetting;   /**< Extended DTE setting. */
+        } ext;
+        /** Special Device: When u8DevEntryType is 0x48. */
+        struct
+        {
+            uint16_t    u16Rsvd0;           /**< Reserved (MBZ). */
+            uint8_t     u8DteSetting;       /**< DTE (Device Table Entry) setting. */
+            uint8_t     u8Handle;           /**< Handle contains I/O APIC ID or HPET number. */
+            uint16_t    u16DevIdB;          /**< Device ID B (I/O APIC or HPET). */
+            uint8_t     u8Variety;          /**< Whether this is the HPET or I/O APIC. */
+        } special;
+    } u;
+} ACPIIVHDDEVENTRY8;
+#pragma pack()
+AssertCompileSize(ACPIIVHDDEVENTRY8, 8);
+
+/** @name IVHD Type 10h Flags.
+ * In accordance with the AMD spec.
+ * @{ */
+/** Peripheral page request support. */
+#define ACPI_IVHD_10H_F_PPR_SUP                         RT_BIT(7)
+/** Prefetch IOMMU pages command support. */
+#define ACPI_IVHD_10H_F_PREF_SUP                        RT_BIT(6)
+/** Coherent control. */
+#define ACPI_IVHD_10H_F_COHERENT                        RT_BIT(5)
+/** Remote IOTLB support. */
+#define ACPI_IVHD_10H_F_IOTLB_SUP                       RT_BIT(4)
+/** Isochronous control. */
+#define ACPI_IVHD_10H_F_ISOC                            RT_BIT(3)
+/** Response Pass Posted Write. */
+#define ACPI_IVHD_10H_F_RES_PASS_PW                     RT_BIT(2)
+/** Pass Posted Write. */
+#define ACPI_IVHD_10H_F_PASS_PW                         RT_BIT(1)
+/** HyperTransport Tunnel. */
+#define ACPI_IVHD_10H_F_HT_TUNNEL                       RT_BIT(0)
+/** @} */
+
+/** @name IVRS IVinfo field.
+ * In accordance with the AMD spec.
+ * @{ */
+/** EFRSup: Extended Feature Support. */
+#define ACPI_IVINFO_BF_EFR_SUP_SHIFT                    0
+#define ACPI_IVINFO_BF_EFR_SUP_MASK                     UINT32_C(0x00000001)
+/** DMA Remap Sup: DMA remapping support (pre-boot DMA protection with
+ *  mandatory remapping of device accessed memory). */
+#define ACPI_IVINFO_BF_DMA_REMAP_SUP_SHIFT              1
+#define ACPI_IVINFO_BF_DMA_REMAP_SUP_MASK               UINT32_C(0x00000002)
+/** Bits 4:2 reserved. */
+#define ACPI_IVINFO_BF_RSVD_2_4_SHIFT                   2
+#define ACPI_IVINFO_BF_RSVD_2_4_MASK                    UINT32_C(0x0000001c)
+/** GVASize: Guest virtual-address size. */
+#define ACPI_IVINFO_BF_GVA_SIZE_SHIFT                   5
+#define ACPI_IVINFO_BF_GVA_SIZE_MASK                    UINT32_C(0x000000e0)
+/** PASize: System physical address size. */
+#define ACPI_IVINFO_BF_PA_SIZE_SHIFT                    8
+#define ACPI_IVINFO_BF_PA_SIZE_MASK                     UINT32_C(0x00007f00)
+/** VASize: Virtual address size. */
+#define ACPI_IVINFO_BF_VA_SIZE_SHIFT                    15
+#define ACPI_IVINFO_BF_VA_SIZE_MASK                     UINT32_C(0x003f8000)
+/** HTAtsResv: HyperTransport ATS-response address translation range reserved. */
+#define ACPI_IVINFO_BF_HT_ATS_RESV_SHIFT                22
+#define ACPI_IVINFO_BF_HT_ATS_RESV_MASK                 UINT32_C(0x00400000)
+/** Bits 31:23 reserved. */
+#define ACPI_IVINFO_BF_RSVD_23_31_SHIFT                 23
+#define ACPI_IVINFO_BF_RSVD_23_31_MASK                  UINT32_C(0xff800000)
+RT_BF_ASSERT_COMPILE_CHECKS(ACPI_IVINFO_BF_, UINT32_C(0), UINT32_MAX,
+                            (EFR_SUP, DMA_REMAP_SUP, RSVD_2_4, GVA_SIZE, PA_SIZE, VA_SIZE, HT_ATS_RESV, RSVD_23_31));
+/** @} */
+
+/** @name IVHD IOMMU info flags.
+ * In accordance with the AMD spec.
+ * @{ */
+/** MSI message number for the event log. */
+#define ACPI_IOMMU_INFO_BF_MSI_NUM_SHIFT                0
+#define ACPI_IOMMU_INFO_BF_MSI_NUM_MASK                 UINT16_C(0x001f)
+/** Bits 7:5 reserved. */
+#define ACPI_IOMMU_INFO_BF_RSVD_5_7_SHIFT               5
+#define ACPI_IOMMU_INFO_BF_RSVD_5_7_MASK                UINT16_C(0x00e0)
+/** IOMMU HyperTransport Unit ID number. */
+#define ACPI_IOMMU_INFO_BF_UNIT_ID_SHIFT                8
+#define ACPI_IOMMU_INFO_BF_UNIT_ID_MASK                 UINT16_C(0x1f00)
+/** Bits 15:13 reserved. */
+#define ACPI_IOMMU_INFO_BF_RSVD_13_15_SHIFT             13
+#define ACPI_IOMMU_INFO_BF_RSVD_13_15_MASK              UINT16_C(0xe000)
+RT_BF_ASSERT_COMPILE_CHECKS(ACPI_IOMMU_INFO_BF_, UINT16_C(0), UINT16_MAX,
+                            (MSI_NUM, RSVD_5_7, UNIT_ID, RSVD_13_15));
+/** @} */
+
+/** @name IVHD IOMMU feature reporting field.
+ * In accordance with the AMD spec.
+ * @{ */
+/** x2APIC supported for peripherals. */
+#define ACPI_IOMMU_FEAT_BF_XT_SUP_SHIFT                 0
+#define ACPI_IOMMU_FEAT_BF_XT_SUP_MASK                  UINT32_C(0x00000001)
+/** NX supported for I/O. */
+#define ACPI_IOMMU_FEAT_BF_NX_SUP_SHIFT                 1
+#define ACPI_IOMMU_FEAT_BF_NX_SUP_MASK                  UINT32_C(0x00000002)
+/** GT (Guest Translation) supported. */
+#define ACPI_IOMMU_FEAT_BF_GT_SUP_SHIFT                 2
+#define ACPI_IOMMU_FEAT_BF_GT_SUP_MASK                  UINT32_C(0x00000004)
+/** GLX (Number of guest CR3 tables) supported. */
+#define ACPI_IOMMU_FEAT_BF_GLX_SUP_SHIFT                3
+#define ACPI_IOMMU_FEAT_BF_GLX_SUP_MASK                 UINT32_C(0x00000018)
+/** IA (INVALIDATE_IOMMU_ALL) command supported. */
+#define ACPI_IOMMU_FEAT_BF_IA_SUP_SHIFT                 5
+#define ACPI_IOMMU_FEAT_BF_IA_SUP_MASK                  UINT32_C(0x00000020)
+/** GA (Guest virtual APIC) supported. */
+#define ACPI_IOMMU_FEAT_BF_GA_SUP_SHIFT                 6
+#define ACPI_IOMMU_FEAT_BF_GA_SUP_MASK                  UINT32_C(0x00000040)
+/** HE (Hardware error) registers supported. */
+#define ACPI_IOMMU_FEAT_BF_HE_SUP_SHIFT                 7
+#define ACPI_IOMMU_FEAT_BF_HE_SUP_MASK                  UINT32_C(0x00000080)
+/** PASMax (maximum PASID) supported. Ignored if PPRSup=0. */
+#define ACPI_IOMMU_FEAT_BF_PAS_MAX_SHIFT                8
+#define ACPI_IOMMU_FEAT_BF_PAS_MAX_MASK                 UINT32_C(0x00001f00)
+/** PNCounters (Number of performance counters per counter bank) supported. */
+#define ACPI_IOMMU_FEAT_BF_PN_COUNTERS_SHIFT            13
+#define ACPI_IOMMU_FEAT_BF_PN_COUNTERS_MASK             UINT32_C(0x0001e000)
+/** PNBanks (Number of performance counter banks) supported. */
+#define ACPI_IOMMU_FEAT_BF_PN_BANKS_SHIFT               17
+#define ACPI_IOMMU_FEAT_BF_PN_BANKS_MASK                UINT32_C(0x007e0000)
+/** MSINumPPR (MSI number for peripheral page requests). */
+#define ACPI_IOMMU_FEAT_BF_MSI_NUM_PPR_SHIFT            23
+#define ACPI_IOMMU_FEAT_BF_MSI_NUM_PPR_MASK             UINT32_C(0x0f800000)
+/** GATS (Guest address translation size). MBZ when GTSup=0. */
+#define ACPI_IOMMU_FEAT_BF_GATS_SHIFT                   28
+#define ACPI_IOMMU_FEAT_BF_GATS_MASK                    UINT32_C(0x30000000)
+/** HATS (Host address translation size). */
+#define ACPI_IOMMU_FEAT_BF_HATS_SHIFT                   30
+#define ACPI_IOMMU_FEAT_BF_HATS_MASK                    UINT32_C(0xc0000000)
+RT_BF_ASSERT_COMPILE_CHECKS(ACPI_IOMMU_FEAT_BF_, UINT32_C(0), UINT32_MAX,
+                            (XT_SUP, NX_SUP, GT_SUP, GLX_SUP, IA_SUP, GA_SUP, HE_SUP, PAS_MAX, PN_COUNTERS, PN_BANKS,
+                             MSI_NUM_PPR, GATS, HATS));
+/** @} */
+
+/** @name IOMMU Extended Feature Register (PCI/MMIO/ACPI).
+ * In accordance with the AMD spec.
+ * @{ */
+/** PreFSup: Prefetch support (RO).   */
+#define IOMMU_EXT_FEAT_BF_PREF_SUP_SHIFT                0
+#define IOMMU_EXT_FEAT_BF_PREF_SUP_MASK                 UINT64_C(0x0000000000000001)
+/** PPRSup: Peripheral Page Request (PPR) support (RO). */
+#define IOMMU_EXT_FEAT_BF_PPR_SUP_SHIFT                 1
+#define IOMMU_EXT_FEAT_BF_PPR_SUP_MASK                  UINT64_C(0x0000000000000002)
+/** XTSup: x2APIC support (RO). */
+#define IOMMU_EXT_FEAT_BF_X2APIC_SUP_SHIFT              2
+#define IOMMU_EXT_FEAT_BF_X2APIC_SUP_MASK               UINT64_C(0x0000000000000004)
+/** NXSup: No Execute (PMR and PRIV) support (RO). */
+#define IOMMU_EXT_FEAT_BF_NO_EXEC_SUP_SHIFT             3
+#define IOMMU_EXT_FEAT_BF_NO_EXEC_SUP_MASK              UINT64_C(0x0000000000000008)
+/** GTSup: Guest Translation support (RO). */
+#define IOMMU_EXT_FEAT_BF_GT_SUP_SHIFT                  4
+#define IOMMU_EXT_FEAT_BF_GT_SUP_MASK                   UINT64_C(0x0000000000000010)
+/** Bit 5 reserved. */
+#define IOMMU_EXT_FEAT_BF_RSVD_5_SHIFT                  5
+#define IOMMU_EXT_FEAT_BF_RSVD_5_MASK                   UINT64_C(0x0000000000000020)
+/** IASup: INVALIDATE_IOMMU_ALL command support (RO). */
+#define IOMMU_EXT_FEAT_BF_IA_SUP_SHIFT                  6
+#define IOMMU_EXT_FEAT_BF_IA_SUP_MASK                   UINT64_C(0x0000000000000040)
+/** GASup: Guest virtual-APIC support (RO). */
+#define IOMMU_EXT_FEAT_BF_GA_SUP_SHIFT                  7
+#define IOMMU_EXT_FEAT_BF_GA_SUP_MASK                   UINT64_C(0x0000000000000080)
+/** HESup: Hardware error registers support (RO). */
+#define IOMMU_EXT_FEAT_BF_HE_SUP_SHIFT                  8
+#define IOMMU_EXT_FEAT_BF_HE_SUP_MASK                   UINT64_C(0x0000000000000100)
+/** PCSup: Performance counters support (RO). */
+#define IOMMU_EXT_FEAT_BF_PC_SUP_SHIFT                  9
+#define IOMMU_EXT_FEAT_BF_PC_SUP_MASK                   UINT64_C(0x0000000000000200)
+/** HATS: Host Address Translation Size (RO). */
+#define IOMMU_EXT_FEAT_BF_HATS_SHIFT                    10
+#define IOMMU_EXT_FEAT_BF_HATS_MASK                     UINT64_C(0x0000000000000c00)
+/** GATS: Guest Address Translation Size (RO). */
+#define IOMMU_EXT_FEAT_BF_GATS_SHIFT                    12
+#define IOMMU_EXT_FEAT_BF_GATS_MASK                     UINT64_C(0x0000000000003000)
+/** GLXSup: Guest CR3 root table level support  (RO). */
+#define IOMMU_EXT_FEAT_BF_GLX_SUP_SHIFT                 14
+#define IOMMU_EXT_FEAT_BF_GLX_SUP_MASK                  UINT64_C(0x000000000000c000)
+/** SmiFSup: SMI filter register support  (RO). */
+#define IOMMU_EXT_FEAT_BF_SMI_FLT_SUP_SHIFT             16
+#define IOMMU_EXT_FEAT_BF_SMI_FLT_SUP_MASK              UINT64_C(0x0000000000030000)
+/** SmiFRC: SMI filter register count  (RO). */
+#define IOMMU_EXT_FEAT_BF_SMI_FLT_REG_CNT_SHIFT         18
+#define IOMMU_EXT_FEAT_BF_SMI_FLT_REG_CNT_MASK          UINT64_C(0x00000000001c0000)
+/** GAMSup: Guest virtual-APIC modes support (RO). */
+#define IOMMU_EXT_FEAT_BF_GAM_SUP_SHIFT                 21
+#define IOMMU_EXT_FEAT_BF_GAM_SUP_MASK                  UINT64_C(0x0000000000e00000)
+/** DualPprLogSup: Dual PPR Log support (RO). */
+#define IOMMU_EXT_FEAT_BF_DUAL_PPR_LOG_SUP_SHIFT        24
+#define IOMMU_EXT_FEAT_BF_DUAL_PPR_LOG_SUP_MASK         UINT64_C(0x0000000003000000)
+/** Bits 27:26 reserved. */
+#define IOMMU_EXT_FEAT_BF_RSVD_26_27_SHIFT              26
+#define IOMMU_EXT_FEAT_BF_RSVD_26_27_MASK               UINT64_C(0x000000000c000000)
+/** DualEventLogSup: Dual Event Log support (RO). */
+#define IOMMU_EXT_FEAT_BF_DUAL_EVT_LOG_SUP_SHIFT        28
+#define IOMMU_EXT_FEAT_BF_DUAL_EVT_LOG_SUP_MASK         UINT64_C(0x0000000030000000)
+/** Bits 31:30 reserved. */
+#define IOMMU_EXT_FEAT_BF_RSVD_30_31_SHIFT              30
+#define IOMMU_EXT_FEAT_BF_RSVD_30_31_MASK               UINT64_C(0x00000000c0000000)
+/** PASMax: Maximum PASID support (RO). */
+#define IOMMU_EXT_FEAT_BF_PASID_MAX_SHIFT               32
+#define IOMMU_EXT_FEAT_BF_PASID_MAX_MASK                UINT64_C(0x0000001f00000000)
+/** USSup: User/Supervisor support (RO). */
+#define IOMMU_EXT_FEAT_BF_US_SUP_SHIFT                  37
+#define IOMMU_EXT_FEAT_BF_US_SUP_MASK                   UINT64_C(0x0000002000000000)
+/** DevTblSegSup: Segmented Device Table support (RO). */
+#define IOMMU_EXT_FEAT_BF_DEV_TBL_SEG_SUP_SHIFT         38
+#define IOMMU_EXT_FEAT_BF_DEV_TBL_SEG_SUP_MASK          UINT64_C(0x000000c000000000)
+/** PprOverflwEarlySup: PPR Log Overflow Early warning support (RO). */
+#define IOMMU_EXT_FEAT_BF_PPR_OVERFLOW_EARLY_SHIFT      40
+#define IOMMU_EXT_FEAT_BF_PPR_OVERFLOW_EARLY_MASK       UINT64_C(0x0000010000000000)
+/** PprAutoRspSup: PPR Automatic Response support (RO). */
+#define IOMMU_EXT_FEAT_BF_PPR_AUTO_RES_SUP_SHIFT        41
+#define IOMMU_EXT_FEAT_BF_PPR_AUTO_RES_SUP_MASK         UINT64_C(0x0000020000000000)
+/** MarcSup: Memory Access and Routing (MARC) support (RO). */
+#define IOMMU_EXT_FEAT_BF_MARC_SUP_SHIFT                42
+#define IOMMU_EXT_FEAT_BF_MARC_SUP_MASK                 UINT64_C(0x00000c0000000000)
+/** BlkStopMrkSup: Block StopMark message support (RO). */
+#define IOMMU_EXT_FEAT_BF_BLKSTOP_MARK_SUP_SHIFT        44
+#define IOMMU_EXT_FEAT_BF_BLKSTOP_MARK_SUP_MASK         UINT64_C(0x0000100000000000)
+/** PerfOptSup: IOMMU Performance Optimization support (RO). */
+#define IOMMU_EXT_FEAT_BF_PERF_OPT_SUP_SHIFT            45
+#define IOMMU_EXT_FEAT_BF_PERF_OPT_SUP_MASK             UINT64_C(0x0000200000000000)
+/** MsiCapMmioSup: MSI-Capability Register MMIO access support (RO). */
+#define IOMMU_EXT_FEAT_BF_MSI_CAP_MMIO_SUP_SHIFT        46
+#define IOMMU_EXT_FEAT_BF_MSI_CAP_MMIO_SUP_MASK         UINT64_C(0x0000400000000000)
+/** Bit 47 reserved. */
+#define IOMMU_EXT_FEAT_BF_RSVD_47_SHIFT                 47
+#define IOMMU_EXT_FEAT_BF_RSVD_47_MASK                  UINT64_C(0x0000800000000000)
+/** GIoSup: Guest I/O Protection support (RO). */
+#define IOMMU_EXT_FEAT_BF_GST_IO_PROT_SUP_SHIFT         48
+#define IOMMU_EXT_FEAT_BF_GST_IO_PROT_SUP_MASK          UINT64_C(0x0001000000000000)
+/** HASup: Host Access support (RO). */
+#define IOMMU_EXT_FEAT_BF_HST_ACCESS_SUP_SHIFT          49
+#define IOMMU_EXT_FEAT_BF_HST_ACCESS_SUP_MASK           UINT64_C(0x0002000000000000)
+/** EPHSup: Enhandled PPR Handling support (RO). */
+#define IOMMU_EXT_FEAT_BF_ENHANCED_PPR_SUP_SHIFT        50
+#define IOMMU_EXT_FEAT_BF_ENHANCED_PPR_SUP_MASK         UINT64_C(0x0004000000000000)
+/** AttrFWSup: Attribute Forward support (RO). */
+#define IOMMU_EXT_FEAT_BF_ATTR_FW_SUP_SHIFT             51
+#define IOMMU_EXT_FEAT_BF_ATTR_FW_SUP_MASK              UINT64_C(0x0008000000000000)
+/** HDSup: Host Dirty Support (RO). */
+#define IOMMU_EXT_FEAT_BF_HST_DIRTY_SUP_SHIFT           52
+#define IOMMU_EXT_FEAT_BF_HST_DIRTY_SUP_MASK            UINT64_C(0x0010000000000000)
+/** Bit 53 reserved. */
+#define IOMMU_EXT_FEAT_BF_RSVD_53_SHIFT                 53
+#define IOMMU_EXT_FEAT_BF_RSVD_53_MASK                  UINT64_C(0x0020000000000000)
+/** InvIotlbTypeSup: Invalidate IOTLB type support (RO). */
+#define IOMMU_EXT_FEAT_BF_INV_IOTLB_TYPE_SUP_SHIFT      54
+#define IOMMU_EXT_FEAT_BF_INV_IOTLB_TYPE_SUP_MASK       UINT64_C(0x0040000000000000)
+/** Bits 60:55 reserved. */
+#define IOMMU_EXT_FEAT_BF_RSVD_55_60_SHIFT              55
+#define IOMMU_EXT_FEAT_BF_RSVD_55_60_MASK               UINT64_C(0x1f80000000000000)
+/** GAUpdateDisSup: Support disabling hardware update on guest page table access
+ *  (RO). */
+#define IOMMU_EXT_FEAT_BF_GA_UPDATE_DIS_SUP_SHIFT       61
+#define IOMMU_EXT_FEAT_BF_GA_UPDATE_DIS_SUP_MASK        UINT64_C(0x2000000000000000)
+/** ForcePhysDestSup: Force Physical Destination Mode for Remapped Interrupt
+ *  support (RO). */
+#define IOMMU_EXT_FEAT_BF_FORCE_PHYS_DST_SUP_SHIFT      62
+#define IOMMU_EXT_FEAT_BF_FORCE_PHYS_DST_SUP_MASK       UINT64_C(0x4000000000000000)
+/** Bit 63 reserved. */
+#define IOMMU_EXT_FEAT_BF_RSVD_63_SHIFT                 63
+#define IOMMU_EXT_FEAT_BF_RSVD_63_MASK                  UINT64_C(0x8000000000000000)
+RT_BF_ASSERT_COMPILE_CHECKS(IOMMU_EXT_FEAT_BF_, UINT64_C(0), UINT64_MAX,
+                            (PREF_SUP, PPR_SUP, X2APIC_SUP, NO_EXEC_SUP, GT_SUP, RSVD_5, IA_SUP, GA_SUP, HE_SUP, PC_SUP,
+                             HATS, GATS, GLX_SUP, SMI_FLT_SUP, SMI_FLT_REG_CNT, GAM_SUP, DUAL_PPR_LOG_SUP, RSVD_26_27,
+                             DUAL_EVT_LOG_SUP, RSVD_30_31, PASID_MAX, US_SUP, DEV_TBL_SEG_SUP, PPR_OVERFLOW_EARLY,
+                             PPR_AUTO_RES_SUP, MARC_SUP, BLKSTOP_MARK_SUP, PERF_OPT_SUP, MSI_CAP_MMIO_SUP, RSVD_47,
+                             GST_IO_PROT_SUP, HST_ACCESS_SUP, ENHANCED_PPR_SUP, ATTR_FW_SUP, HST_DIRTY_SUP, RSVD_53,
+                             INV_IOTLB_TYPE_SUP, RSVD_55_60, GA_UPDATE_DIS_SUP, FORCE_PHYS_DST_SUP, RSVD_63));
+/** @} */
+
+/**
+ * IVHD (I/O Virtualization Hardware Definition) Type 10h.
+ * In accordance with the AMD spec.
+ */
+typedef struct ACPIIVHDTYPE10
+{
+    uint8_t         u8Type;                 /**< Type: Must be 0x10. */
+    uint8_t         u8Flags;                /**< Flags (see ACPI_IVHD_10H_F_XXX). */
+    uint16_t        u16Length;              /**< Length of IVHD including IVHD device entries. */
+    uint16_t        u16DeviceId;            /**< Device ID of the IOMMU. */
+    uint16_t        u16CapOffset;           /**< Offset in Capability space for control fields of IOMMU. */
+    uint64_t        u64BaseAddress;         /**< Base address of IOMMU control registers in MMIO space. */
+    uint16_t        u16PciSegmentGroup;     /**< PCI segment group number. */
+    uint16_t        u16IommuInfo;           /**< Interrupt number and Unit ID. */
+    uint32_t        u32Features;            /**< IOMMU feature reporting. */
+    /* IVHD device entry block follows. */
+} ACPIIVHDTYPE10;
+AssertCompileSize(ACPIIVHDTYPE10, 24);
+
+/** @name IVHD Type 11h Flags.
+ * In accordance with the AMD spec.
+ * @{ */
+/** Coherent control. */
+#define ACPI_IVHD_11H_F_COHERENT                        RT_BIT(5)
+/** Remote IOTLB support. */
+#define ACPI_IVHD_11H_F_IOTLB_SUP                       RT_BIT(4)
+/** Isochronous control. */
+#define ACPI_IVHD_11H_F_ISOC                            RT_BIT(3)
+/** Response Pass Posted Write. */
+#define ACPI_IVHD_11H_F_RES_PASS_PW                     RT_BIT(2)
+/** Pass Posted Write. */
+#define ACPI_IVHD_11H_F_PASS_PW                         RT_BIT(1)
+/** HyperTransport Tunnel. */
+#define ACPI_IVHD_11H_F_HT_TUNNEL                       RT_BIT(0)
+/** @} */
+
+/** @name IVHD IOMMU Type 11 Attributes field.
+ * In accordance with the AMD spec.
+ * @{ */
+/** Bits 12:0 reserved. */
+#define ACPI_IOMMU_ATTR_BF_RSVD_0_12_SHIFT              0
+#define ACPI_IOMMU_ATTR_BF_RSVD_0_12_MASK               UINT32_C(0x00001fff)
+/** PNCounters: Number of performance counters per counter bank. */
+#define ACPI_IOMMU_ATTR_BF_PN_COUNTERS_SHIFT            13
+#define ACPI_IOMMU_ATTR_BF_PN_COUNTERS_MASK             UINT32_C(0x0001e000)
+/** PNBanks: Number of performance counter banks. */
+#define ACPI_IOMMU_ATTR_BF_PN_BANKS_SHIFT               17
+#define ACPI_IOMMU_ATTR_BF_PN_BANKS_MASK                UINT32_C(0x007e0000)
+/** MSINumPPR: MSI number for peripheral page requests (PPR). */
+#define ACPI_IOMMU_ATTR_BF_MSI_NUM_PPR_SHIFT            23
+#define ACPI_IOMMU_ATTR_BF_MSI_NUM_PPR_MASK             UINT32_C(0x0f800000)
+/** Bits 31:28 reserved. */
+#define ACPI_IOMMU_ATTR_BF_RSVD_28_31_SHIFT             28
+#define ACPI_IOMMU_ATTR_BF_RSVD_28_31_MASK              UINT32_C(0xf0000000)
+RT_BF_ASSERT_COMPILE_CHECKS(ACPI_IOMMU_ATTR_BF_, UINT32_C(0), UINT32_MAX,
+                            (RSVD_0_12, PN_COUNTERS, PN_BANKS, MSI_NUM_PPR, RSVD_28_31));
+/** @} */
+
+/**
+ * AMD IOMMU: IVHD (I/O Virtualization Hardware Definition) Type 11h.
+ * In accordance with the AMD spec.
+ */
+typedef struct ACPIIVHDTYPE11
+{
+    uint8_t         u8Type;                 /**< Type: Must be 0x11. */
+    uint8_t         u8Flags;                /**< Flags. */
+    uint16_t        u16Length;              /**< Length: Size starting from Type fields incl. IVHD device entries. */
+    uint16_t        u16DeviceId;            /**< Device ID of the IOMMU. */
+    uint16_t        u16CapOffset;           /**< Offset in Capability space for control fields of IOMMU. */
+    uint64_t        u64BaseAddress;         /**< Base address of IOMMU control registers in MMIO space. */
+    uint16_t        u16PciSegmentGroup;     /**< PCI segment group number. */
+    uint16_t        u16IommuInfo;           /**< Interrupt number and unit ID. */
+    uint32_t        u32IommuAttr;           /**< IOMMU info. not reported in EFR. */
+    uint64_t        u64EfrRegister;         /**< Extended Feature Register (must be identical to its MMIO shadow). */
+    uint64_t        u64Rsvd0;               /**< Reserved for future. */
+    /* IVHD device entry block follows. */
+} ACPIIVHDTYPE11;
+AssertCompileSize(ACPIIVHDTYPE11, 40);
+
+/**
+ * AMD IOMMU: IVHD (I/O Virtualization Hardware Definition) Type 40h.
+ * In accordance with the AMD spec.
+ */
+typedef struct ACPIIVHDTYPE11 ACPIIVHDTYPE40;
+
+#endif /* !VBOX_INCLUDED_iommu_amd_h */
Index: /trunk/src/VBox/Devices/Bus/DevIommuAmd.cpp
===================================================================
--- /trunk/src/VBox/Devices/Bus/DevIommuAmd.cpp	(revision 85911)
+++ /trunk/src/VBox/Devices/Bus/DevIommuAmd.cpp	(revision 85912)
@@ -22,10 +22,13 @@
 #define LOG_GROUP LOG_GROUP_DEV_IOMMU
 #include <VBox/msi.h>
+#include <VBox/iommu-amd.h>
 #include <VBox/vmm/pdmdev.h>
 #include <VBox/AssertGuest.h>
 
-#include "VBoxDD.h"
 #include <iprt/x86.h>
 #include <iprt/string.h>
+
+#include "VBoxDD.h"
+#include "DevIommuAmd.h"
 
 
@@ -33,459 +36,15 @@
 *   Defined Constants And Macros                                                                                                 *
 *********************************************************************************************************************************/
-/**
- * @name PCI configuration register offsets.
- * In accordance with the AMD spec.
- * @{
- */
-#define IOMMU_PCI_OFF_CAP_HDR                       0x40
-#define IOMMU_PCI_OFF_BASE_ADDR_REG_LO              0x44
-#define IOMMU_PCI_OFF_BASE_ADDR_REG_HI              0x48
-#define IOMMU_PCI_OFF_RANGE_REG                     0x4c
-#define IOMMU_PCI_OFF_MISCINFO_REG_0                0x50
-#define IOMMU_PCI_OFF_MISCINFO_REG_1                0x54
-#define IOMMU_PCI_OFF_MSI_CAP_HDR                   0x64
-#define IOMMU_PCI_OFF_MSI_ADDR_LO                   0x68
-#define IOMMU_PCI_OFF_MSI_ADDR_HI                   0x6c
-#define IOMMU_PCI_OFF_MSI_DATA                      0x70
-#define IOMMU_PCI_OFF_MSI_MAP_CAP_HDR               0x74
-/** @} */
-
-/**
- * @name MMIO register offsets.
- * In accordance with the AMD spec.
- * @{
- */
-#define IOMMU_MMIO_OFF_DEV_TAB_BAR                  0x00
-#define IOMMU_MMIO_OFF_CMD_BUF_BAR                  0x08
-#define IOMMU_MMIO_OFF_EVT_LOG_BAR                  0x10
-#define IOMMU_MMIO_OFF_CTRL                         0x18
-#define IOMMU_MMIO_OFF_EXCL_BAR                     0x20
-#define IOMMU_MMIO_OFF_EXCL_RANGE_LIMIT             0x28
-#define IOMMU_MMIO_OFF_EXT_FEAT                     0x30
-
-#define IOMMU_MMIO_OFF_PPR_LOG_BAR                  0x38
-#define IOMMU_MMIO_OFF_HW_EVT_HI                    0x40
-#define IOMMU_MMIO_OFF_HW_EVT_LO                    0x48
-#define IOMMU_MMIO_OFF_HW_EVT_STATUS                0x50
-
-#define IOMMU_MMIO_OFF_SMI_FLT_FIRST                0x60
-#define IOMMU_MMIO_OFF_SMI_FLT_LAST                 0xd8
-
-#define IOMMU_MMIO_OFF_GALOG_BAR                    0xe0
-#define IOMMU_MMIO_OFF_GALOG_TAIL_ADDR              0xe8
-
-#define IOMMU_MMIO_OFF_PPR_LOG_B_BAR                0xf0
-#define IOMMU_MMIO_OFF_PPR_EVT_B_BAR                0xf8
-
-#define IOMMU_MMIO_OFF_DEV_TAB_SEG_FIRST            0x100
-#define IOMMU_MMIO_OFF_DEV_TAB_SEG_1                0x100
-#define IOMMU_MMIO_OFF_DEV_TAB_SEG_2                0x108
-#define IOMMU_MMIO_OFF_DEV_TAB_SEG_3                0x110
-#define IOMMU_MMIO_OFF_DEV_TAB_SEG_4                0x118
-#define IOMMU_MMIO_OFF_DEV_TAB_SEG_5                0x120
-#define IOMMU_MMIO_OFF_DEV_TAB_SEG_6                0x128
-#define IOMMU_MMIO_OFF_DEV_TAB_SEG_7                0x130
-#define IOMMU_MMIO_OFF_DEV_TAB_SEG_LAST             0x130
-
-#define IOMMU_MMIO_OFF_DEV_SPECIFIC_FEAT            0x138
-#define IOMMU_MMIO_OFF_DEV_SPECIFIC_CTRL            0x140
-#define IOMMU_MMIO_OFF_DEV_SPECIFIC_STATUS          0x148
-
-#define IOMMU_MMIO_OFF_MSI_VECTOR_0                 0x150
-#define IOMMU_MMIO_OFF_MSI_VECTOR_1                 0x154
-#define IOMMU_MMIO_OFF_MSI_CAP_HDR                  0x158
-#define IOMMU_MMIO_OFF_MSI_ADDR_LO                  0x15c
-#define IOMMU_MMIO_OFF_MSI_ADDR_HI                  0x160
-#define IOMMU_MMIO_OFF_MSI_DATA                     0x164
-#define IOMMU_MMIO_OFF_MSI_MAPPING_CAP_HDR          0x168
-
-#define IOMMU_MMIO_OFF_PERF_OPT_CTRL                0x16c
-
-#define IOMMU_MMIO_OFF_XT_GEN_INTR_CTRL             0x170
-#define IOMMU_MMIO_OFF_XT_PPR_INTR_CTRL             0x178
-#define IOMMU_MMIO_OFF_XT_GALOG_INT_CTRL            0x180
-
-#define IOMMU_MMIO_OFF_MARC_APER_BAR_0              0x200
-#define IOMMU_MMIO_OFF_MARC_APER_RELOC_0            0x208
-#define IOMMU_MMIO_OFF_MARC_APER_LEN_0              0x210
-#define IOMMU_MMIO_OFF_MARC_APER_BAR_1              0x218
-#define IOMMU_MMIO_OFF_MARC_APER_RELOC_1            0x220
-#define IOMMU_MMIO_OFF_MARC_APER_LEN_1              0x228
-#define IOMMU_MMIO_OFF_MARC_APER_BAR_2              0x230
-#define IOMMU_MMIO_OFF_MARC_APER_RELOC_2            0x238
-#define IOMMU_MMIO_OFF_MARC_APER_LEN_2              0x240
-#define IOMMU_MMIO_OFF_MARC_APER_BAR_3              0x248
-#define IOMMU_MMIO_OFF_MARC_APER_RELOC_3            0x250
-#define IOMMU_MMIO_OFF_MARC_APER_LEN_3              0x258
-
-#define IOMMU_MMIO_OFF_RSVD_REG                     0x1ff8
-
-#define IOMMU_MMIO_CMD_BUF_HEAD_PTR                 0x2000
-#define IOMMU_MMIO_CMD_BUF_TAIL_PTR                 0x2008
-#define IOMMU_MMIO_EVT_LOG_HEAD_PTR                 0x2010
-#define IOMMU_MMIO_EVT_LOG_TAIL_PTR                 0x2018
-
-#define IOMMU_MMIO_OFF_STATUS                       0x2020
-
-#define IOMMU_MMIO_OFF_PPR_LOG_HEAD_PTR             0x2030
-#define IOMMU_MMIO_OFF_PPR_LOG_TAIL_PTR             0x2038
-
-#define IOMMU_MMIO_OFF_GALOG_HEAD_PTR               0x2040
-#define IOMMU_MMIO_OFF_GALOG_TAIL_PTR               0x2048
-
-#define IOMMU_MMIO_OFF_PPR_LOG_B_HEAD_PTR           0x2050
-#define IOMMU_MMIO_OFF_PPR_LOG_B_TAIL_PTR           0x2058
-
-#define IOMMU_MMIO_OFF_EVT_LOG_B_HEAD_PTR           0x2070
-#define IOMMU_MMIO_OFF_EVT_LOG_B_TAIL_PTR           0x2078
-
-#define IOMMU_MMIO_OFF_PPR_LOG_AUTO_RESP            0x2080
-#define IOMMU_MMIO_OFF_PPR_LOG_OVERFLOW_EARLY       0x2088
-#define IOMMU_MMIO_OFF_PPR_LOG_B_OVERFLOW_EARLY     0x2090
-/** @} */
-
-/**
- * @name MMIO register-access table offsets.
- * Each table [first..last] (both inclusive) represents the range of registers
- * covered by a distinct register-access table. This is done due to arbitrary large
- * gaps in the MMIO register offsets themselves.
- * @{
- */
-#define IOMMU_MMIO_OFF_TABLE_0_FIRST               0x00
-#define IOMMU_MMIO_OFF_TABLE_0_LAST                0x258
-
-#define IOMMU_MMIO_OFF_TABLE_1_FIRST               0x1ff8
-#define IOMMU_MMIO_OFF_TABLE_1_LAST                0x2090
-/** @} */
-
-/**
- * @name Commands.
- * In accordance with the AMD spec.
- * @{
- */
-#define IOMMU_CMD_COMPLETION_WAIT                   0x01
-#define IOMMU_CMD_INV_DEV_TAB_ENTRY                 0x02
-#define IOMMU_CMD_INV_IOMMU_PAGES                   0x03
-#define IOMMU_CMD_INV_IOTLB_PAGES                   0x04
-#define IOMMU_CMD_INV_INTR_TABLE                    0x05
-#define IOMMU_CMD_PREFETCH_IOMMU_PAGES              0x06
-#define IOMMU_CMD_COMPLETE_PPR_REQ                  0x07
-#define IOMMU_CMD_INV_IOMMU_ALL                     0x08
-/** @} */
-
-/**
- * @name Event codes.
- * In accordance with the AMD spec.
- * @{
- */
-#define IOMMU_EVT_ILLEGAL_DEV_TAB_ENTRY             0x01
-#define IOMMU_EVT_IO_PAGE_FAULT                     0x02
-#define IOMMU_EVT_DEV_TAB_HW_ERROR                  0x03
-#define IOMMU_EVT_PAGE_TAB_HW_ERROR                 0x04
-#define IOMMU_EVT_ILLEGAL_CMD_ERROR                 0x05
-#define IOMMU_EVT_COMMAND_HW_ERROR                  0x06
-#define IOMMU_EVT_IOTLB_INV_TIMEOUT                 0x07
-#define IOMMU_EVT_INVALID_DEV_REQ                   0x08
-#define IOMMU_EVT_INVALID_PPR_REQ                   0x09
-#define IOMMU_EVT_EVENT_COUNTER_ZERO                0x10
-#define IOMMU_EVT_GUEST_EVENT_FAULT                 0x11
-/** @} */
-
-/**
- * @name IOMMU Capability Header.
- * In accordance with the AMD spec.
- * @{
- */
-/** CapId: Capability ID. */
-#define IOMMU_BF_CAPHDR_CAP_ID_SHIFT                0
-#define IOMMU_BF_CAPHDR_CAP_ID_MASK                 UINT32_C(0x000000ff)
-/** CapPtr: Capability Pointer. */
-#define IOMMU_BF_CAPHDR_CAP_PTR_SHIFT               8
-#define IOMMU_BF_CAPHDR_CAP_PTR_MASK                UINT32_C(0x0000ff00)
-/** CapType: Capability Type. */
-#define IOMMU_BF_CAPHDR_CAP_TYPE_SHIFT              16
-#define IOMMU_BF_CAPHDR_CAP_TYPE_MASK               UINT32_C(0x00070000)
-/** CapRev: Capability Revision. */
-#define IOMMU_BF_CAPHDR_CAP_REV_SHIFT               19
-#define IOMMU_BF_CAPHDR_CAP_REV_MASK                UINT32_C(0x00f80000)
-/** IoTlbSup: IO TLB Support. */
-#define IOMMU_BF_CAPHDR_IOTLB_SUP_SHIFT             24
-#define IOMMU_BF_CAPHDR_IOTLB_SUP_MASK              UINT32_C(0x01000000)
-/** HtTunnel: HyperTransport Tunnel translation support. */
-#define IOMMU_BF_CAPHDR_HT_TUNNEL_SHIFT             25
-#define IOMMU_BF_CAPHDR_HT_TUNNEL_MASK              UINT32_C(0x02000000)
-/** NpCache: Not Present table entries Cached. */
-#define IOMMU_BF_CAPHDR_NP_CACHE_SHIFT              26
-#define IOMMU_BF_CAPHDR_NP_CACHE_MASK               UINT32_C(0x04000000)
-/** EFRSup: Extended Feature Register (EFR) Supported. */
-#define IOMMU_BF_CAPHDR_EFR_SUP_SHIFT               27
-#define IOMMU_BF_CAPHDR_EFR_SUP_MASK                UINT32_C(0x08000000)
-/** CapExt: Miscellaneous Information Register Supported . */
-#define IOMMU_BF_CAPHDR_CAP_EXT_SHIFT               28
-#define IOMMU_BF_CAPHDR_CAP_EXT_MASK                UINT32_C(0x10000000)
-/** Bits 31:29 reserved. */
-#define IOMMU_BF_CAPHDR_RSVD_29_31_SHIFT            29
-#define IOMMU_BF_CAPHDR_RSVD_29_31_MASK             UINT32_C(0xe0000000)
-RT_BF_ASSERT_COMPILE_CHECKS(IOMMU_BF_CAPHDR_, UINT32_C(0), UINT32_MAX,
-                            (CAP_ID, CAP_PTR, CAP_TYPE, CAP_REV, IOTLB_SUP, HT_TUNNEL, NP_CACHE, EFR_SUP, CAP_EXT, RSVD_29_31));
-/** @} */
-
-/**
- * @name IOMMU Base Address Low Register.
- * In accordance with the AMD spec.
- * @{
- */
-/** Enable: Enables access to the address specified in the Base Address Register. */
-#define IOMMU_BF_BASEADDR_LO_ENABLE_SHIFT           0
-#define IOMMU_BF_BASEADDR_LO_ENABLE_MASK            UINT32_C(0x00000001)
-/** Bits 13:1 reserved. */
-#define IOMMU_BF_BASEADDR_LO_RSVD_1_13_SHIFT        1
-#define IOMMU_BF_BASEADDR_LO_RSVD_1_13_MASK         UINT32_C(0x00003ffe)
-/** Base Address[31:14]: Low Base address of IOMMU MMIO control registers. */
-#define IOMMU_BF_BASEADDR_LO_ADDR_SHIFT             14
-#define IOMMU_BF_BASEADDR_LO_ADDR_MASK              UINT32_C(0xffffc000)
-RT_BF_ASSERT_COMPILE_CHECKS(IOMMU_BF_BASEADDR_LO_, UINT32_C(0), UINT32_MAX,
-                            (ENABLE, RSVD_1_13, ADDR));
-/** @} */
-
-/**
- * @name IOMMU Range Register.
- * In accordance with the AMD spec.
- * @{
- */
-/** UnitID: HyperTransport Unit ID. */
-#define IOMMU_BF_RANGE_UNIT_ID_SHIFT                0
-#define IOMMU_BF_RANGE_UNIT_ID_MASK                 UINT32_C(0x0000001f)
-/** Bits 6:5 reserved. */
-#define IOMMU_BF_RANGE_RSVD_5_6_SHIFT               5
-#define IOMMU_BF_RANGE_RSVD_5_6_MASK                UINT32_C(0x00000060)
-/** RngValid: Range valid. */
-#define IOMMU_BF_RANGE_VALID_SHIFT                  7
-#define IOMMU_BF_RANGE_VALID_MASK                   UINT32_C(0x00000080)
-/** BusNumber: Device range bus number. */
-#define IOMMU_BF_RANGE_BUS_NUMBER_SHIFT             8
-#define IOMMU_BF_RANGE_BUS_NUMBER_MASK              UINT32_C(0x0000ff00)
-/** First Device. */
-#define IOMMU_BF_RANGE_FIRST_DEVICE_SHIFT           16
-#define IOMMU_BF_RANGE_FIRST_DEVICE_MASK            UINT32_C(0x00ff0000)
-/** Last Device. */
-#define IOMMU_BF_RANGE_LAST_DEVICE_SHIFT            24
-#define IOMMU_BF_RANGE_LAST_DEVICE_MASK             UINT32_C(0xff000000)
-RT_BF_ASSERT_COMPILE_CHECKS(IOMMU_BF_RANGE_, UINT32_C(0), UINT32_MAX,
-                            (UNIT_ID, RSVD_5_6, VALID, BUS_NUMBER, FIRST_DEVICE, LAST_DEVICE));
-/** @} */
-
-/**
- * @name IOMMU Miscellaneous Information Register 0.
- * In accordance with the AMD spec.
- * @{
- */
-/** MsiNum: MSI message number. */
-#define IOMMU_BF_MISCINFO_0_MSI_NUM_SHIFT           0
-#define IOMMU_BF_MISCINFO_0_MSI_NUM_MASK            UINT32_C(0x0000001f)
-/** GvaSize: Guest Virtual Address Size. */
-#define IOMMU_BF_MISCINFO_0_GVA_SIZE_SHIFT          5
-#define IOMMU_BF_MISCINFO_0_GVA_SIZE_MASK           UINT32_C(0x000000e0)
-/** PaSize: Physical Address Size. */
-#define IOMMU_BF_MISCINFO_0_PA_SIZE_SHIFT           8
-#define IOMMU_BF_MISCINFO_0_PA_SIZE_MASK            UINT32_C(0x00007f00)
-/** VaSize: Virtual Address Size. */
-#define IOMMU_BF_MISCINFO_0_VA_SIZE_SHIFT           15
-#define IOMMU_BF_MISCINFO_0_VA_SIZE_MASK            UINT32_C(0x003f8000)
-/** HtAtsResv: HyperTransport ATS Response Address range Reserved. */
-#define IOMMU_BF_MISCINFO_0_HT_ATS_RESV_SHIFT       22
-#define IOMMU_BF_MISCINFO_0_HT_ATS_RESV_MASK        UINT32_C(0x00400000)
-/** Bits 26:23 reserved. */
-#define IOMMU_BF_MISCINFO_0_RSVD_23_26_SHIFT        23
-#define IOMMU_BF_MISCINFO_0_RSVD_23_26_MASK         UINT32_C(0x07800000)
-/** MsiNumPPR: Peripheral Page Request MSI message number. */
-#define IOMMU_BF_MISCINFO_0_MSI_NUM_PPR_SHIFT       27
-#define IOMMU_BF_MISCINFO_0_MSI_NUM_PPR_MASK        UINT32_C(0xf8000000)
-RT_BF_ASSERT_COMPILE_CHECKS(IOMMU_BF_MISCINFO_0_, UINT32_C(0), UINT32_MAX,
-                            (MSI_NUM, GVA_SIZE, PA_SIZE, VA_SIZE, HT_ATS_RESV, RSVD_23_26, MSI_NUM_PPR));
-/** @} */
-
-/**
- * @name IOMMU Miscellaneous Information Register 1.
- * In accordance with the AMD spec.
- * @{
- */
-/** MsiNumGA: MSI message number for guest virtual-APIC log. */
-#define IOMMU_BF_MISCINFO_1_MSI_NUM_GA_SHIFT        0
-#define IOMMU_BF_MISCINFO_1_MSI_NUM_GA_MASK         UINT32_C(0x0000001f)
-/** Bits 31:5 reserved. */
-#define IOMMU_BF_MISCINFO_1_RSVD_5_31_SHIFT         5
-#define IOMMU_BF_MISCINFO_1_RSVD_5_31_MASK          UINT32_C(0xffffffe0)
-RT_BF_ASSERT_COMPILE_CHECKS(IOMMU_BF_MISCINFO_1_, UINT32_C(0), UINT32_MAX,
-                            (MSI_NUM_GA, RSVD_5_31));
-/** @} */
-
-/**
- * @name MSI Capability Header Register.
- * In accordance with the AMD spec.
- * @{
- */
-/** MsiCapId: Capability ID. */
-#define IOMMU_BF_MSI_CAP_HDR_CAP_ID_SHIFT           0
-#define IOMMU_BF_MSI_CAP_HDR_CAP_ID_MASK            UINT32_C(0x000000ff)
-/** MsiCapPtr: Pointer (PCI config offset) to the next capability. */
-#define IOMMU_BF_MSI_CAP_HDR_CAP_PTR_SHIFT          8
-#define IOMMU_BF_MSI_CAP_HDR_CAP_PTR_MASK           UINT32_C(0x0000ff00)
-/** MsiEn: Message Signal Interrupt enable. */
-#define IOMMU_BF_MSI_CAP_HDR_EN_SHIFT               16
-#define IOMMU_BF_MSI_CAP_HDR_EN_MASK                UINT32_C(0x00010000)
-/** MsiMultMessCap: MSI Multi-Message Capability. */
-#define IOMMU_BF_MSI_CAP_HDR_MULTMESS_CAP_SHIFT     17
-#define IOMMU_BF_MSI_CAP_HDR_MULTMESS_CAP_MASK      UINT32_C(0x000e0000)
-/** MsiMultMessEn: MSI Mult-Message Enable. */
-#define IOMMU_BF_MSI_CAP_HDR_MULTMESS_EN_SHIFT      20
-#define IOMMU_BF_MSI_CAP_HDR_MULTMESS_EN_MASK       UINT32_C(0x00700000)
-/** Msi64BitEn: MSI 64-bit Enabled. */
-#define IOMMU_BF_MSI_CAP_HDR_64BIT_EN_SHIFT         23
-#define IOMMU_BF_MSI_CAP_HDR_64BIT_EN_MASK          UINT32_C(0x00800000)
-/** Bits 31:24 reserved. */
-#define IOMMU_BF_MSI_CAP_HDR_RSVD_24_31_SHIFT       24
-#define IOMMU_BF_MSI_CAP_HDR_RSVD_24_31_MASK        UINT32_C(0xff000000)
-RT_BF_ASSERT_COMPILE_CHECKS(IOMMU_BF_MSI_CAP_HDR_, UINT32_C(0), UINT32_MAX,
-                            (CAP_ID, CAP_PTR, EN, MULTMESS_CAP, MULTMESS_EN, 64BIT_EN, RSVD_24_31));
-/** @} */
-
-/**
- * @name MSI Mapping Capability Header Register.
- * In accordance with the AMD spec.
- * @{
- */
-/** MsiMapCapId: Capability ID. */
-#define IOMMU_BF_MSI_MAP_CAPHDR_CAP_ID_SHIFT        0
-#define IOMMU_BF_MSI_MAP_CAPHDR_CAP_ID_MASK         UINT32_C(0x000000ff)
-/** MsiMapCapPtr: Pointer (PCI config offset) to the next capability. */
-#define IOMMU_BF_MSI_MAP_CAPHDR_CAP_PTR_SHIFT       8
-#define IOMMU_BF_MSI_MAP_CAPHDR_CAP_PTR_MASK        UINT32_C(0x0000ff00)
-/** MsiMapEn: MSI mapping capability enable. */
-#define IOMMU_BF_MSI_MAP_CAPHDR_EN_SHIFT            16
-#define IOMMU_BF_MSI_MAP_CAPHDR_EN_MASK             UINT32_C(0x00010000)
-/** MsiMapFixd: MSI interrupt mapping range is not programmable. */
-#define IOMMU_BF_MSI_MAP_CAPHDR_FIXED_SHIFT         17
-#define IOMMU_BF_MSI_MAP_CAPHDR_FIXED_MASK          UINT32_C(0x00020000)
-/** Bits 18:28 reserved. */
-#define IOMMU_BF_MSI_MAP_CAPHDR_RSVD_18_28_SHIFT    18
-#define IOMMU_BF_MSI_MAP_CAPHDR_RSVD_18_28_MASK     UINT32_C(0x07fc0000)
-/** MsiMapCapType: MSI mapping capability. */
-#define IOMMU_BF_MSI_MAP_CAPHDR_CAP_TYPE_SHIFT      27
-#define IOMMU_BF_MSI_MAP_CAPHDR_CAP_TYPE_MASK       UINT32_C(0xf8000000)
-RT_BF_ASSERT_COMPILE_CHECKS(IOMMU_BF_MSI_MAP_CAPHDR_, UINT32_C(0), UINT32_MAX,
-                            (CAP_ID, CAP_PTR, EN, FIXED, RSVD_18_28, CAP_TYPE));
-/** @} */
-
-/**
- * @name IOMMU Status Register Bits.
- * In accordance with the AMD spec.
- * @{
- */
-/** EventOverflow: Event log overflow. */
-#define IOMMU_STATUS_EVT_LOG_OVERFLOW               RT_BIT_64(0)
-/** EventLogInt: Event log interrupt. */
-#define IOMMU_STATUS_EVT_LOG_INTR                   RT_BIT_64(1)
-/** ComWaitInt: Completion wait interrupt. */
-#define IOMMU_STATUS_COMPLETION_WAIT_INTR           RT_BIT_64(2)
-/** EventLogRun: Event log is running. */
-#define IOMMU_STATUS_EVT_LOG_RUNNING                RT_BIT_64(3)
-/** CmdBufRun: Command buffer is running. */
-#define IOMMU_STATUS_CMD_BUF_RUNNING                RT_BIT_64(4)
-/** PprOverflow: Peripheral page request log overflow. */
-#define IOMMU_STATUS_PPR_LOG_OVERFLOW               RT_BIT_64(5)
-/** PprInt: Peripheral page request log interrupt. */
-#define IOMMU_STATUS_PPR_LOG_INTR                   RT_BIT_64(6)
-/** PprLogRun: Peripheral page request log is running. */
-#define IOMMU_STATUS_PPR_LOG_RUN                    RT_BIT_64(7)
-/** GALogRun: Guest virtual-APIC log is running. */
-#define IOMMU_STATUS_GA_LOG_RUN                     RT_BIT_64(8)
-/** GALOverflow: Guest virtual-APIC log overflow. */
-#define IOMMU_STATUS_GA_LOG_OVERFLOW                RT_BIT_64(9)
-/** GAInt: Guest virtual-APIC log interrupt. */
-#define IOMMU_STATUS_GA_LOG_INTR                    RT_BIT_64(10)
-/** PprOvrflwB: PPR Log B overflow. */
-#define IOMMU_STATUS_PPR_LOG_B_OVERFLOW             RT_BIT_64(11)
-/** PprLogActive: PPR Log B is active. */
-#define IOMMU_STATUS_PPR_LOG_B_ACTIVE               RT_BIT_64(12)
-/** EvtOvrflwB: Event log B overflow. */
-#define IOMMU_STATUS_EVT_LOG_B_OVERFLOW             RT_BIT_64(15)
-/** EventLogActive: Event log B active. */
-#define IOMMU_STATUS_EVT_LOG_B_ACTIVE               RT_BIT_64(16)
-/** PprOvrflwEarlyB: PPR log B overflow early warning. */
-#define IOMMU_STATUS_PPR_LOG_B_OVERFLOW_EARLY       RT_BIT_64(17)
-/** PprOverflowEarly: PPR log overflow early warning. */
-#define IOMMU_STATUS_PPR_LOG_OVERFLOW_EARLY         RT_BIT_64(18)
-/** @} */
-
-/** @name IOMMU_IO_PERM_XXX: IOMMU I/O access permissions bits.
- * In accordance with the AMD spec.
- *
- * These values match the shifted values of the IR and IW field of the DTE and the
- * PTE, PDE of the I/O page tables.
- *
- * @{ */
-#define IOMMU_IO_PERM_NONE                          (0)
-#define IOMMU_IO_PERM_READ                          RT_BIT_64(0)
-#define IOMMU_IO_PERM_WRITE                         RT_BIT_64(1)
-#define IOMMU_IO_PERM_READ_WRITE                    (IOMMU_IO_PERM_READ | IOMMU_IO_PERM_WRITE)
-#define IOMMU_IO_PERM_SHIFT                         61
-#define IOMMU_IO_PERM_MASK                          0x3
-/** @} */
-
-/** @name SYSMGT_TYPE_XXX: System Management Message Enable Types.
- * In accordance with the AMD spec.
- * @{ */
-#define SYSMGTTYPE_DMA_DENY                         (0)
-#define SYSMGTTYPE_MSG_ALL_ALLOW                    (1)
-#define SYSMGTTYPE_MSG_INT_ALLOW                    (2)
-#define SYSMGTTYPE_DMA_ALLOW                        (3)
-/** @} */
-
-/** @name IOMMU_INTR_CTRL_XX: DTE::IntCtl field values.
- * These are control bits for handling fixed and arbitrated interrupts.
- * In accordance with the AMD spec.
- * @{ */
-#define IOMMU_INTR_CTRL_TARGET_ABORT                (0)
-#define IOMMU_INTR_CTRL_FWD_UNMAPPED                (1)
-#define IOMMU_INTR_CTRL_REMAP                       (2)
-#define IOMMU_INTR_CTRL_RSVD                        (3)
-/** @} */
-
-/** @name Miscellaneous IOMMU defines.
- * @{ */
 /** Log prefix string. */
 #define IOMMU_LOG_PFX                               "IOMMU-AMD"
 /** The current saved state version. */
 #define IOMMU_SAVED_STATE_VERSION                   1
-/** 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
-/** 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 IOTLB entry magic. */
 #define IOMMU_IOTLBE_MAGIC                          0x10acce55
-/** 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
-/** @} */
-
+
+
+/*********************************************************************************************************************************
+*   Structures and Typedefs                                                                                                      *
+*********************************************************************************************************************************/
 /**
  * Acquires the IOMMU PDM lock.
@@ -534,1654 +93,4 @@
         Assert(!PDMDevHlpCritSectIsOwner(pDevIns, pDevIns->CTX_SUFF(pCritSectRo))); \
     }  while (0)
-
-/**
- * Gets the device table size given the size field.
- */
-#define IOMMU_GET_DEV_TAB_SIZE(a_uSize)     (((a_uSize) + 1) << X86_PAGE_4K_SHIFT)
-
-
-/*********************************************************************************************************************************
-*   Structures and Typedefs                                                                                                      *
-*********************************************************************************************************************************/
-/**
- * The Device ID.
- * In accordance with VirtualBox's PCI configuration.
- */
-typedef union
-{
-    struct
-    {
-        uint16_t    u3Function : 3;  /**< Bits 2:0   - Function. */
-        uint16_t    u9Device : 9;    /**< Bits 11:3  - Device. */
-        uint16_t    u4Bus : 4;       /**< Bits 15:12 - Bus. */
-    } n;
-    /** The unsigned integer view. */
-    uint16_t        u;
-} DEVICE_ID_T;
-AssertCompileSize(DEVICE_ID_T, 2);
-
-/**
- * Device Table Entry (DTE).
- * In accordance with the AMD spec.
- */
-typedef union
-{
-    struct
-    {
-        RT_GCC_EXTENSION uint64_t  u1Valid : 1;                   /**< Bit  0       - V: Valid. */
-        RT_GCC_EXTENSION uint64_t  u1TranslationValid : 1;        /**< Bit  1       - TV: Translation information Valid. */
-        RT_GCC_EXTENSION uint64_t  u5Rsvd0 : 5;                   /**< Bits 6:2     - Reserved. */
-        RT_GCC_EXTENSION uint64_t  u2Had : 2;                     /**< Bits 8:7     - HAD: Host Access Dirty. */
-        RT_GCC_EXTENSION uint64_t  u3Mode : 3;                    /**< Bits 11:9    - Mode: Paging mode. */
-        RT_GCC_EXTENSION uint64_t  u40PageTableRootPtrLo : 40;    /**< Bits 51:12   - Page Table Root Pointer. */
-        RT_GCC_EXTENSION uint64_t  u1Ppr : 1;                     /**< Bit  52      - PPR: Peripheral Page Request. */
-        RT_GCC_EXTENSION uint64_t  u1GstPprRespPasid : 1;         /**< Bit  53      - GRPR: Guest PPR Response with PASID. */
-        RT_GCC_EXTENSION uint64_t  u1GstIoValid : 1;              /**< Bit  54      - GIoV: Guest I/O Protection Valid. */
-        RT_GCC_EXTENSION uint64_t  u1GstTranslateValid : 1;       /**< Bit  55      - GV: Guest translation Valid. */
-        RT_GCC_EXTENSION uint64_t  u2GstMode : 2;                 /**< Bits 57:56   - GLX: Guest Paging mode levels. */
-        RT_GCC_EXTENSION uint64_t  u3GstCr3TableRootPtrLo : 2;    /**< Bits 60:58   - GCR3 TRP: Guest CR3 Table Root Ptr (Lo). */
-        RT_GCC_EXTENSION uint64_t  u1IoRead : 1;                  /**< Bit  61      - IR: I/O Read permission. */
-        RT_GCC_EXTENSION uint64_t  u1IoWrite : 1;                 /**< Bit  62      - IW: I/O Write permission. */
-        RT_GCC_EXTENSION uint64_t  u1Rsvd0 : 1;                   /**< Bit  63      - Reserved. */
-        RT_GCC_EXTENSION uint64_t  u16DomainId : 1;               /**< Bits 79:64   - Domain ID. */
-        RT_GCC_EXTENSION uint64_t  u16GstCr3TableRootPtrMed : 16; /**< Bits 95:80   - GCR3 TRP: Guest CR3 Table Root Ptr (Mid). */
-        RT_GCC_EXTENSION uint64_t  u1IoTlbEnable : 1;             /**< Bit  96      - I: IOTLB Enable. */
-        RT_GCC_EXTENSION uint64_t  u1SuppressPfEvents : 1;        /**< Bit  97      - SE: Supress Page-fault events. */
-        RT_GCC_EXTENSION uint64_t  u1SuppressAllPfEvents : 1;     /**< Bit  98      - SA: Supress All Page-fault events. */
-        RT_GCC_EXTENSION uint64_t  u2IoCtl : 1;                   /**< Bits 100:99  - IoCtl: Port I/O Control. */
-        RT_GCC_EXTENSION uint64_t  u1Cache : 1;                   /**< Bit  101     - Cache: IOTLB Cache Hint. */
-        RT_GCC_EXTENSION uint64_t  u1SnoopDisable : 1;            /**< Bit  102     - SD: Snoop Disable. */
-        RT_GCC_EXTENSION uint64_t  u1AllowExclusion : 1;          /**< Bit  103     - EX: Allow Exclusion. */
-        RT_GCC_EXTENSION uint64_t  u2SysMgt : 2;                  /**< Bits 105:104 - SysMgt: System Management message enable. */
-        RT_GCC_EXTENSION uint64_t  u1Rsvd1 : 1;                   /**< Bit  106     - Reserved. */
-        RT_GCC_EXTENSION uint64_t  u21GstCr3TableRootPtrHi : 21;  /**< Bits 127:107 - GCR3 TRP: Guest CR3 Table Root Ptr (Hi). */
-        RT_GCC_EXTENSION uint64_t  u1IntrMapValid : 1;            /**< Bit  128     - IV: Interrupt map Valid. */
-        RT_GCC_EXTENSION uint64_t  u4IntrTableLength : 4;         /**< Bits 132:129 - IntTabLen: Interrupt Table Length. */
-        RT_GCC_EXTENSION uint64_t  u1IgnoreUnmappedIntrs : 1;     /**< Bits 133     - IG: Ignore unmapped interrupts. */
-        RT_GCC_EXTENSION uint64_t  u26IntrTableRootPtr : 26;      /**< Bits 159:134 - Interrupt Root Table Pointer (Lo). */
-        RT_GCC_EXTENSION uint64_t  u20IntrTableRootPtr : 20;      /**< Bits 179:160 - Interrupt Root Table Pointer (Hi). */
-        RT_GCC_EXTENSION uint64_t  u4Rsvd0 : 4;                   /**< Bits 183:180 - Reserved. */
-        RT_GCC_EXTENSION uint64_t  u1InitPassthru : 1;            /**< Bits 184     - INIT Pass-through. */
-        RT_GCC_EXTENSION uint64_t  u1ExtIntPassthru : 1;          /**< Bits 185     - External Interrupt Pass-through. */
-        RT_GCC_EXTENSION uint64_t  u1NmiPassthru : 1;             /**< Bits 186     - NMI Pass-through. */
-        RT_GCC_EXTENSION uint64_t  u1Rsvd2 : 1;                   /**< Bits 187     - Reserved. */
-        RT_GCC_EXTENSION uint64_t  u2IntrCtrl : 2;                /**< Bits 189:188 - IntCtl: Interrupt Control. */
-        RT_GCC_EXTENSION uint64_t  u1Lint0Passthru : 1;           /**< Bit  190     - Lint0Pass: LINT0 Pass-through. */
-        RT_GCC_EXTENSION uint64_t  u1Lint1Passthru : 1;           /**< Bit  191     - Lint1Pass: LINT1 Pass-through. */
-        RT_GCC_EXTENSION uint64_t  u32Rsvd0 : 32;                 /**< Bits 223:192 - Reserved. */
-        RT_GCC_EXTENSION uint64_t  u22Rsvd0 : 22;                 /**< Bits 245:224 - Reserved. */
-        RT_GCC_EXTENSION uint64_t  u1AttrOverride : 1;            /**< Bit  246     - AttrV: Attribute Override. */
-        RT_GCC_EXTENSION uint64_t  u1Mode0FC: 1;                  /**< Bit  247     - Mode0FC. */
-        RT_GCC_EXTENSION uint64_t  u8SnoopAttr: 1;                /**< Bits 255:248 - Snoop Attribute. */
-    } n;
-    /** The 32-bit unsigned integer view. */
-    uint32_t        au32[8];
-    /** The 64-bit unsigned integer view. */
-    uint64_t        au64[4];
-} DTE_T;
-AssertCompileSize(DTE_T, 32);
-/** Pointer to a device table entry. */
-typedef DTE_T *PDTE_T;
-/** Pointer to a const device table entry. */
-typedef DTE_T const *PCDTE_T;
-
-/** Mask of valid  bits for EPHSUP (Enhanced Peripheral Page Request Handling
- *  Support) feature (bits 52:53). */
-#define IOMMU_DTE_QWORD_0_FEAT_EPHSUP_MASK      UINT64_C(0x0030000000000000)
-
-/** Mask of valid bits for GTSup (Guest Translation Support) feature (bits 55:60,
- *  bits 80:95). */
-#define IOMMU_DTE_QWORD_0_FEAT_GTSUP_MASK       UINT64_C(0x1f80000000000000)
-#define IOMMU_DTE_QWORD_1_FEAT_GTSUP_MASK       UINT64_C(0x00000000ffff0000)
-
-/* Mask of valid bits for GIoSup (Guest I/O Protection Support) feature (bit 54). */
-#define IOMMU_DTE_QWORD_0_FEAT_GIOSUP_MASK      UINT64_C(0x0040000000000000)
-
-/* Mask of valid DTE feature bits. */
-#define IOMMU_DTE_QWORD_0_FEAT_MASK             (  IOMMU_DTE_QWORD_0_FEAT_EPHSUP_MASK \
-                                                 | IOMMU_DTE_QWORD_0_FEAT_GTSUP_MASK  \
-                                                 | IOMMU_DTE_QWORD_0_FEAT_GIOSUP_MASK)
-#define IOMMU_DTE_QWORD_1_FEAT_MASK             (IOMMU_DTE_QWORD_0_FEAT_GIOSUP_MASK)
-
-/* Mask of all valid DTE bits (including all feature bits). */
-#define IOMMU_DTE_QWORD_0_VALID_MASK            UINT64_C(0x7fffffffffffff83)
-#define IOMMU_DTE_QWORD_1_VALID_MASK            UINT64_C(0xfffffbffffffffff)
-#define IOMMU_DTE_QWORD_2_VALID_MASK            UINT64_C(0xf70fffffffffffff)
-#define IOMMU_DTE_QWORD_3_VALID_MASK            UINT64_C(0xffc0000000000000)
-
-/* Mask of the interrupt table root pointer. */
-#define IOMMU_DTE_IRTE_ROOT_PTR_MASK            UINT64_C(0x000fffffffffff80)
-
-/**
- * I/O Page Translation Entry.
- * In accordance with the AMD spec.
- */
-typedef union
-{
-    struct
-    {
-        RT_GCC_EXTENSION uint64_t    u1Present : 1;             /**< Bit  0      - PR: Present. */
-        RT_GCC_EXTENSION uint64_t    u4Ign0 : 4;                /**< Bits 4:1    - Ignored. */
-        RT_GCC_EXTENSION uint64_t    u1Accessed : 1;            /**< Bit  5      - A: Accessed. */
-        RT_GCC_EXTENSION uint64_t    u1Dirty : 1;               /**< Bit  6      - D: Dirty. */
-        RT_GCC_EXTENSION uint64_t    u2Ign0 : 2;                /**< Bits 8:7    - Ignored. */
-        RT_GCC_EXTENSION uint64_t    u3NextLevel : 3;           /**< Bits 11:9   - Next Level: Next page translation level. */
-        RT_GCC_EXTENSION uint64_t    u40PageAddr : 40;          /**< Bits 51:12  - Page address. */
-        RT_GCC_EXTENSION uint64_t    u7Rsvd0 : 7;               /**< Bits 58:52  - Reserved. */
-        RT_GCC_EXTENSION uint64_t    u1UntranslatedAccess : 1;  /**< Bit 59      - U: Untranslated Access Only. */
-        RT_GCC_EXTENSION uint64_t    u1ForceCoherent : 1;       /**< Bit 60      - FC: Force Coherent. */
-        RT_GCC_EXTENSION uint64_t    u1IoRead : 1;              /**< Bit 61      - IR: I/O Read permission. */
-        RT_GCC_EXTENSION uint64_t    u1IoWrite : 1;             /**< Bit 62      - IW: I/O Wead permission. */
-        RT_GCC_EXTENSION uint64_t    u1Ign0 : 1;                /**< Bit 63      - Ignored. */
-    } n;
-    /** The 64-bit unsigned integer view. */
-    uint64_t        u64;
-} IOPTE_T;
-AssertCompileSize(IOPTE_T, 8);
-
-/**
- * I/O Page Directory Entry.
- * In accordance with the AMD spec.
- */
-typedef union
-{
-    struct
-    {
-        RT_GCC_EXTENSION uint64_t    u1Present : 1;         /**< Bit  0      - PR: Present. */
-        RT_GCC_EXTENSION uint64_t    u4Ign0 : 4;            /**< Bits 4:1    - Ignored. */
-        RT_GCC_EXTENSION uint64_t    u1Accessed : 1;        /**< Bit  5      - A: Accessed. */
-        RT_GCC_EXTENSION uint64_t    u3Ign0 : 3;            /**< Bits 8:6    - Ignored. */
-        RT_GCC_EXTENSION uint64_t    u3NextLevel : 3;       /**< Bits 11:9   - Next Level: Next page translation level. */
-        RT_GCC_EXTENSION uint64_t    u40PageAddr : 40;      /**< Bits 51:12  - Page address (Next Table Address). */
-        RT_GCC_EXTENSION uint64_t    u9Rsvd0 : 9;           /**< Bits 60:52  - Reserved. */
-        RT_GCC_EXTENSION uint64_t    u1IoRead : 1;          /**< Bit 61      - IR: I/O Read permission. */
-        RT_GCC_EXTENSION uint64_t    u1IoWrite : 1;         /**< Bit 62      - IW: I/O Wead permission. */
-        RT_GCC_EXTENSION uint64_t    u1Ign0 : 1;            /**< Bit 63      - Ignored. */
-    } n;
-    /** The 64-bit unsigned integer view. */
-    uint64_t        u64;
-} IOPDE_T;
-AssertCompileSize(IOPDE_T, 8);
-
-/**
- * I/O Page Table Entity.
- * In accordance with the AMD spec.
- *
- * This a common subset of an DTE.au64[0], PTE and PDE.
- * Named as an "entity" to avoid confusing it with PTE.
- */
-typedef union
-{
-    struct
-    {
-        RT_GCC_EXTENSION uint64_t    u1Present : 1;         /**< Bit  0      - PR: Present. */
-        RT_GCC_EXTENSION uint64_t    u8Ign0 : 8;            /**< Bits 8:1    - Ignored. */
-        RT_GCC_EXTENSION uint64_t    u3NextLevel : 3;       /**< Bits 11:9   - Mode / Next Level: Next page translation level. */
-        RT_GCC_EXTENSION uint64_t    u40Addr : 40;          /**< Bits 51:12  - Page address. */
-        RT_GCC_EXTENSION uint64_t    u9Ign0 : 9;            /**< Bits 60:52  - Ignored. */
-        RT_GCC_EXTENSION uint64_t    u1IoRead : 1;          /**< Bit 61      - IR: I/O Read permission. */
-        RT_GCC_EXTENSION uint64_t    u1IoWrite : 1;         /**< Bit 62      - IW: I/O Wead permission. */
-        RT_GCC_EXTENSION uint64_t    u1Ign0 : 1;            /**< Bit 63      - Ignored. */
-    } n;
-    /** The 64-bit unsigned integer view. */
-    uint64_t        u64;
-} IOPTENTITY_T;
-AssertCompileSize(IOPTENTITY_T, 8);
-AssertCompile(sizeof(IOPTENTITY_T) == sizeof(IOPTE_T));
-AssertCompile(sizeof(IOPTENTITY_T) == sizeof(IOPDE_T));
-/** Pointer to an IOPT_ENTITY_T struct. */
-typedef IOPTENTITY_T *PIOPTENTITY_T;
-/** Pointer to a const IOPT_ENTITY_T struct. */
-typedef IOPTENTITY_T const *PCIOPTENTITY_T;
-/** Mask of the address field. */
-#define IOMMU_PTENTITY_ADDR_MASK     UINT64_C(0x000ffffffffff000)
-
-/**
- * Interrupt Remapping Table Entry (IRTE).
- * In accordance with the AMD spec.
- */
-typedef union
-{
-    struct
-    {
-        uint32_t    u1RemapEnable : 1;      /**< Bit  0     - RemapEn: Remap Enable. */
-        uint32_t    u1SuppressPf : 1;       /**< Bit  1     - SupIOPF: Supress I/O Page Fault. */
-        uint32_t    u3IntrType : 1;         /**< Bits 4:2   - IntType: Interrupt Type. */
-        uint32_t    u1ReqEoi : 1;           /**< Bit  5     - RqEoi: Request EOI. */
-        uint32_t    u1DestMode : 1;         /**< Bit  6     - DM: Destination Mode. */
-        uint32_t    u1GuestMode : 1;        /**< Bit  7     - GuestMode. */
-        uint32_t    u8Dest : 8;             /**< Bits 15:8  - Destination. */
-        uint32_t    u8Vector : 8;           /**< Bits 23:16 - Vector. */
-        uint32_t    u8Rsvd0 : 8;            /**< Bits 31:24 - Reserved. */
-    } n;
-    /** The 32-bit unsigned integer view. */
-    uint32_t        u32;
-} IRTE_T;
-AssertCompileSize(IRTE_T, 4);
-/** The number of bits to shift the IRTE offset to get the IRTE. */
-#define IOMMU_IRTE_SIZE_SHIFT   (2)
-/** Pointer to an IRTE_T struct. */
-typedef IRTE_T *PIRTE_T;
-/** Pointer to a const IRTE_T struct. */
-typedef IRTE_T const *PCIRTE_T;
-
-/** The IRTE offset corresponds directly to bits 10:0 of the originating MSI
- *  interrupt message. See AMD IOMMU spec. 2.2.5 "Interrupt Remapping Tables". */
-#define IOMMU_MSI_DATA_IRTE_OFFSET_MASK     UINT32_C(0x000007ff)
-
-/**
- * Command: Generic Command Buffer Entry.
- * In accordance with the AMD spec.
- */
-typedef union
-{
-    struct
-    {
-        uint32_t    u32Operand1Lo;          /**< Bits 31:0   - Operand 1 (Lo). */
-        uint32_t    u32Operand1Hi : 28;     /**< Bits 59:32  - Operand 1 (Hi). */
-        uint32_t    u4Opcode : 4;           /**< Bits 63:60  - Op Code. */
-        uint64_t    u64Operand2;            /**< Bits 127:64 - Operand 2. */
-    } n;
-    /** The 64-bit unsigned integer view. */
-    uint64_t    au64[2];
-} CMD_GENERIC_T;
-AssertCompileSize(CMD_GENERIC_T, 16);
-/** Pointer to a generic command buffer entry. */
-typedef CMD_GENERIC_T *PCMD_GENERIC_T;
-/** Pointer to a const generic command buffer entry. */
-typedef CMD_GENERIC_T const *PCCMD_GENERIC_T;
-
-/** Number of bits to shift the byte offset of a command in the command buffer to
- *  get its index. */
-#define IOMMU_CMD_GENERIC_SHIFT   4
-
-/**
- * Command: COMPLETION_WAIT.
- * In accordance with the AMD spec.
- */
-typedef union
-{
-    struct
-    {
-        uint32_t    u1Store : 1;           /**< Bit  0      - S: Completion Store. */
-        uint32_t    u1Interrupt : 1;       /**< Bit  1      - I: Completion Interrupt. */
-        uint32_t    u1Flush : 1;           /**< Bit  2      - F: Flush Queue. */
-        uint32_t    u29StoreAddrLo : 29;   /**< Bits 31:3   - Store Address (Lo). */
-        uint32_t    u20StoreAddrHi : 20;   /**< Bits 51:32  - Store Address (Hi). */
-        uint32_t    u8Rsvd0 : 8;           /**< Bits 59:52  - Reserved. */
-        uint32_t    u4OpCode : 4;          /**< Bits 63:60  - OpCode (Command). */
-        uint64_t    u64StoreData;          /**< Bits 127:64 - Store Data. */
-    } n;
-    /** The 64-bit unsigned integer view. */
-    uint64_t    au64[2];
-} CMD_COMWAIT_T;
-AssertCompileSize(CMD_COMWAIT_T, 16);
-/** Pointer to a completion wait command. */
-typedef CMD_COMWAIT_T *PCMD_COMWAIT_T;
-/** Pointer to a const completion wait command. */
-typedef CMD_COMWAIT_T const *PCCMD_COMWAIT_T;
-#define IOMMU_CMD_COM_WAIT_QWORD_0_VALID_MASK        UINT64_C(0xf00fffffffffffff)
-
-/**
- * Command: INVALIDATE_DEVTAB_ENTRY.
- * In accordance with the AMD spec.
- */
-typedef union
-{
-    struct
-    {
-        uint16_t                     u16DevId;          /**< Bits 15:0   - Device ID. */
-        uint16_t                     u16Rsvd0;          /**< Bits 31:16  - Reserved. */
-        uint32_t                     u28Rsvd0 : 28;     /**< Bits 59:32  - Reserved. */
-        uint32_t                     u4OpCode : 4;      /**< Bits 63:60  - Op Code (Command). */
-        uint64_t                     u64Rsvd0;          /**< Bits 127:64 - Reserved. */
-    } n;
-    /** The 64-bit unsigned integer view. */
-    uint64_t    au64[2];
-} CMD_INV_DTE_T;
-AssertCompileSize(CMD_INV_DTE_T, 16);
-
-/**
- * Command: INVALIDATE_IOMMU_PAGES.
- * In accordance with the AMD spec.
- */
-typedef union
-{
-    struct
-    {
-        uint32_t    u20Pasid : 20;          /**< Bits 19:0   - PASID: Process Address-Space ID. */
-        uint32_t    u12Rsvd0 : 12;          /**< Bits 31:20  - Reserved. */
-        uint32_t    u16DomainId : 16;       /**< Bits 47:32  - Domain ID. */
-        uint32_t    u12Rsvd1 : 12;          /**< Bits 59:48  - Reserved. */
-        uint32_t    u4OpCode : 4;           /**< Bits 63:60  - Op Code (Command). */
-        uint32_t    u1Size : 1;             /**< Bit  64     - S: Size. */
-        uint32_t    u1PageDirEntries : 1;   /**< Bit  65     - PDE: Page Directory Entries. */
-        uint32_t    u1GuestOrNested : 1;    /**< Bit  66     - GN: Guest (GPA) or Nested (GVA). */
-        uint32_t    u9Rsvd0 : 9;            /**< Bits 75:67  - Reserved. */
-        uint32_t    u20AddrLo : 20;         /**< Bits 95:76  - Address (Lo). */
-        uint32_t    u32AddrHi;              /**< Bits 127:96 - Address (Hi). */
-    } n;
-    /** The 64-bit unsigned integer view. */
-    uint64_t    au64[2];
-} CMD_INV_IOMMU_PAGES_T;
-AssertCompileSize(CMD_INV_IOMMU_PAGES_T, 16);
-
-/**
- * Command: INVALIDATE_IOTLB_PAGES.
- * In accordance with the AMD spec.
- */
-typedef union
-{
-    struct
-    {
-        uint16_t    u16DevId;               /**< Bits 15:0   - Device ID. */
-        uint8_t     u8PasidLo;              /**< Bits 23:16  - PASID: Process Address-Space ID (Lo). */
-        uint8_t     u8MaxPend;              /**< Bits 31:24  - Maxpend: Maximum simultaneous in-flight transactions. */
-        uint32_t    u16QueueId : 16;        /**< Bits 47:32  - Queue ID. */
-        uint32_t    u12PasidHi : 12;        /**< Bits 59:48  - PASID: Process Address-Space ID (Hi). */
-        uint32_t    u4OpCode : 4;           /**< Bits 63:60  - Op Code (Command). */
-        uint32_t    u1Size : 1;             /**< Bit  64     - S: Size. */
-        uint32_t    u1Rsvd0: 1;             /**< Bit  65     - Reserved. */
-        uint32_t    u1GuestOrNested : 1;    /**< Bit  66     - GN: Guest (GPA) or Nested (GVA). */
-        uint32_t    u1Rsvd1 : 1;            /**< Bit  67     - Reserved. */
-        uint32_t    u2Type : 2;             /**< Bit  69:68  - Type. */
-        uint32_t    u6Rsvd0 : 6;            /**< Bits 75:70  - Reserved. */
-        uint32_t    u20AddrLo : 20;         /**< Bits 95:76  - Address (Lo). */
-        uint32_t    u32AddrHi;              /**< Bits 127:96 - Address (Hi). */
-    } n;
-    /** The 64-bit unsigned integer view. */
-    uint64_t    au64[2];
-} CMD_INV_IOTLB_PAGES_T;
-AssertCompileSize(CMD_INV_IOTLB_PAGES_T, 16);
-
-/**
- * Command: INVALIDATE_INTR_TABLE.
- * In accordance with the AMD spec.
- */
-typedef union
-{
-    struct
-    {
-        uint16_t    u16DevId;           /**< Bits 15:0   - Device ID. */
-        uint16_t    u16Rsvd0;           /**< Bits 31:16  - Reserved. */
-        uint32_t    u32Rsvd0 : 28;      /**< Bits 59:32  - Reserved. */
-        uint32_t    u4OpCode : 4;       /**< Bits 63:60  - Op Code (Command). */
-        uint64_t    u64Rsvd0;           /**< Bits 127:64 - Reserved. */
-    } u;
-    /** The 64-bit unsigned integer view. */
-    uint64_t    au64[2];
-} CMD_INV_INTR_TABLE_T;
-AssertCompileSize(CMD_INV_INTR_TABLE_T, 16);
-
-/**
- * Command: COMPLETE_PPR_REQ.
- * In accordance with the AMD spec.
- */
-typedef union
-{
-    struct
-    {
-        uint16_t    u16DevId;               /**< Bits 15:0    - Device ID. */
-        uint16_t    u16Rsvd0;               /**< Bits 31:16   - Reserved. */
-        uint32_t    u20Pasid : 20;          /**< Bits 51:32   - PASID: Process Address-Space ID. */
-        uint32_t    u8Rsvd0 : 8;            /**< Bits 59:52   - Reserved. */
-        uint32_t    u4OpCode : 4;           /**< Bits 63:60   - Op Code (Command). */
-        uint32_t    u2Rsvd0 : 2;            /**< Bits 65:64   - Reserved. */
-        uint32_t    u1GuestOrNested : 1;    /**< Bit  66      - GN: Guest (GPA) or Nested (GVA). */
-        uint32_t    u29Rsvd0 : 29;          /**< Bits 95:67   - Reserved. */
-        uint32_t    u16CompletionTag : 16;  /**< Bits 111:96  - Completion Tag. */
-        uint32_t    u16Rsvd1 : 16;          /**< Bits 127:112 - Reserved. */
-    } n;
-    /** The 64-bit unsigned integer view. */
-    uint64_t    au64[2];
-} CMD_COMPLETE_PPR_REQ_T;
-AssertCompileSize(CMD_COMPLETE_PPR_REQ_T, 16);
-
-/**
- * Command: INV_IOMMU_ALL.
- * In accordance with the AMD spec.
- */
-typedef union
-{
-    struct
-    {
-        uint32_t    u32Rsvd0;           /**< Bits 31:0   - Reserved. */
-        uint32_t    u28Rsvd0 : 28;      /**< Bits 59:32  - Reserved. */
-        uint32_t    u4OpCode : 4;       /**< Bits 63:60  - Op Code (Command). */
-        uint64_t    u64Rsvd0;           /**< Bits 127:64 - Reserved. */
-    } n;
-    /** The 64-bit unsigned integer view. */
-    uint64_t    au64[2];
-} CMD_IOMMU_ALL_T;
-AssertCompileSize(CMD_IOMMU_ALL_T, 16);
-
-/**
- * Event Log Entry: Generic.
- * In accordance with the AMD spec.
- */
-typedef union
-{
-    struct
-    {
-        uint32_t    u32Operand1Lo;          /**< Bits 31:0   - Operand 1 (Lo). */
-        uint32_t    u32Operand1Hi : 28;     /**< Bits 59:32  - Operand 1 (Hi). */
-        uint32_t    u4EvtCode : 4;          /**< Bits 63:60  - Event code. */
-        uint32_t    u32Operand2Lo;          /**< Bits 95:64  - Operand 2 (Lo). */
-        uint32_t    u32Operand2Hi;          /**< Bits 127:96 - Operand 2 (Hi). */
-    } n;
-    /** The 32-bit unsigned integer view.  */
-    uint32_t    au32[4];
-} EVT_GENERIC_T;
-AssertCompileSize(EVT_GENERIC_T, 16);
-/** Number of bits to shift the byte offset of an event entry in the event log
- *  buffer to get its index. */
-#define IOMMU_EVT_GENERIC_SHIFT   4
-/** Pointer to a generic event log entry. */
-typedef EVT_GENERIC_T *PEVT_GENERIC_T;
-/** Pointer to a const generic event log entry. */
-typedef const EVT_GENERIC_T *PCEVT_GENERIC_T;
-
-/**
- * Hardware event types.
- * In accordance with the AMD spec.
- */
-typedef enum HWEVTTYPE
-{
-    HWEVTTYPE_RSVD = 0,
-    HWEVTTYPE_MASTER_ABORT,
-    HWEVTTYPE_TARGET_ABORT,
-    HWEVTTYPE_DATA_ERROR
-} HWEVTTYPE;
-AssertCompileSize(HWEVTTYPE, 4);
-
-/**
- * Event Log Entry: ILLEGAL_DEV_TABLE_ENTRY.
- * In accordance with the AMD spec.
- */
-typedef union
-{
-    struct
-    {
-        uint16_t    u16DevId;               /**< Bits 15:0   - Device ID. */
-        uint16_t    u4PasidHi : 4;          /**< Bits 19:16  - PASID: Process Address-Space ID (Hi). */
-        uint16_t    u12Rsvd0 : 12;          /**< Bits 31:20  - Reserved. */
-        uint16_t    u16PasidLo;             /**< Bits 47:32  - PASID: Process Address-Space ID (Lo). */
-        uint16_t    u1GuestOrNested : 1;    /**< Bit  48     - GN: Guest (GPA) or Nested (GVA). */
-        uint16_t    u2Rsvd0 : 2;            /**< Bits 50:49  - Reserved. */
-        uint16_t    u1Interrupt : 1;        /**< Bit  51     - I: Interrupt. */
-        uint16_t    u1Rsvd0 : 1;            /**< Bit  52     - Reserved. */
-        uint16_t    u1ReadWrite : 1;        /**< Bit  53     - RW: Read/Write. */
-        uint16_t    u1Rsvd1 : 1;            /**< Bit  54     - Reserved. */
-        uint16_t    u1RsvdNotZero : 1;      /**< Bit  55     - RZ: Reserved bit not Zero (0=invalid level encoding). */
-        uint16_t    u1Translation : 1;      /**< Bit  56     - TN: Translation. */
-        uint16_t    u3Rsvd0 : 3;            /**< Bits 59:57  - Reserved. */
-        uint16_t    u4EvtCode : 4;          /**< Bits 63:60  - Event code. */
-        uint64_t    u64Addr;                /**< Bits 127:64 - Address: I/O Virtual Address (IOVA). */
-    } n;
-    /** The 32-bit unsigned integer view.  */
-    uint32_t    au32[4];
-    /** The 64-bit unsigned integer view. */
-    uint64_t    au64[2];
-} EVT_ILLEGAL_DTE_T;
-AssertCompileSize(EVT_ILLEGAL_DTE_T, 16);
-/** Pointer to an illegal device table entry event. */
-typedef EVT_ILLEGAL_DTE_T *PEVT_ILLEGAL_DTE_T;
-/** Pointer to a const illegal device table entry event. */
-typedef EVT_ILLEGAL_DTE_T const *PCEVT_ILLEGAL_DTE_T;
-
-/**
- * Event Log Entry: IO_PAGE_FAULT_EVENT.
- * In accordance with the AMD spec.
- */
-typedef union
-{
-    struct
-    {
-        uint16_t    u16DevId;               /**< Bits 15:0   - Device ID. */
-        uint16_t    u4PasidHi : 4;          /**< Bits 19:16  - PASID: Process Address-Space ID (Hi). */
-        uint16_t    u16DomainOrPasidLo;     /**< Bits 47:32  - D/P: Domain ID or Process Address-Space ID (Lo). */
-        uint16_t    u1GuestOrNested : 1;    /**< Bit  48     - GN: Guest (GPA) or Nested (GVA). */
-        uint16_t    u1NoExecute : 1;        /**< Bit  49     - NX: No Execute. */
-        uint16_t    u1User : 1;             /**< Bit  50     - US: User/Supervisor. */
-        uint16_t    u1Interrupt : 1;        /**< Bit  51     - I: Interrupt. */
-        uint16_t    u1Present : 1;          /**< Bit  52     - PR: Present. */
-        uint16_t    u1ReadWrite : 1;        /**< Bit  53     - RW: Read/Write. */
-        uint16_t    u1PermDenied : 1;       /**< Bit  54     - PE: Permission Indicator. */
-        uint16_t    u1RsvdNotZero : 1;      /**< Bit  55     - RZ: Reserved bit not Zero (0=invalid level encoding). */
-        uint16_t    u1Translation : 1;      /**< Bit  56     - TN: Translation. */
-        uint16_t    u3Rsvd0 : 3;            /**< Bit  59:57  - Reserved. */
-        uint16_t    u4EvtCode : 4;          /**< Bits 63:60  - Event code. */
-        uint64_t    u64Addr;                /**< Bits 127:64 - Address: I/O Virtual Address (IOVA). */
-    } n;
-    /** The 32-bit unsigned integer view.  */
-    uint32_t    au32[4];
-    /** The 64-bit unsigned integer view. */
-    uint64_t    au64[2];
-} EVT_IO_PAGE_FAULT_T;
-AssertCompileSize(EVT_IO_PAGE_FAULT_T, 16);
-/** Pointer to an I/O page fault event. */
-typedef EVT_IO_PAGE_FAULT_T *PEVT_IO_PAGE_FAULT_T;
-/** Pointer to a const I/O page fault event. */
-typedef EVT_IO_PAGE_FAULT_T const *PCEVT_IO_PAGE_FAULT_T;
-
-
-/**
- * Event Log Entry: DEV_TAB_HARDWARE_ERROR.
- * In accordance with the AMD spec.
- */
-typedef union
-{
-    struct
-    {
-        uint16_t    u16DevId;               /**< Bits 15:0   - Device ID. */
-        uint16_t    u16Rsvd0;               /**< Bits 31:16  - Reserved. */
-        uint32_t    u19Rsvd0 : 19;          /**< Bits 50:32  - Reserved. */
-        uint32_t    u1Intr : 1;             /**< Bit  51     - I: Interrupt (1=interrupt request, 0=memory request). */
-        uint32_t    u1Rsvd0 : 1;            /**< Bit  52     - Reserved. */
-        uint32_t    u1ReadWrite : 1;        /**< Bit  53     - RW: Read/Write transaction (only meaninful when I=0 and TR=0). */
-        uint32_t    u2Rsvd0 : 2;            /**< Bits 55:54  - Reserved. */
-        uint32_t    u1Translation : 1;      /**< Bit  56     - TR: Translation (1=translation, 0=transaction). */
-        uint32_t    u2Type : 2;             /**< Bits 58:57  - Type: The type of hardware error. */
-        uint32_t    u1Rsvd1 : 1;            /**< Bit  59     - Reserved. */
-        uint32_t    u4EvtCode : 4;          /**< Bits 63:60  - Event code. */
-        uint64_t    u64Addr;                /**< Bits 127:64 - Address. */
-    } n;
-    /** The 32-bit unsigned integer view.  */
-    uint32_t    au32[4];
-    /** The 64-bit unsigned integer view. */
-    uint64_t    au64[2];
-} EVT_DEV_TAB_HW_ERROR_T;
-AssertCompileSize(EVT_DEV_TAB_HW_ERROR_T, 16);
-/** Pointer to a device table hardware error event. */
-typedef EVT_DEV_TAB_HW_ERROR_T *PEVT_DEV_TAB_HW_ERROR_T;
-/** Pointer to a const device table hardware error event. */
-typedef EVT_DEV_TAB_HW_ERROR_T const *PCEVT_DEV_TAB_HW_ERROR_T;
-
-/**
- * Event Log Entry: EVT_PAGE_TAB_HARDWARE_ERROR.
- * In accordance with the AMD spec.
- */
-typedef union
-{
-    struct
-    {
-        uint16_t    u16DevId;                   /**< Bits 15:0   - Device ID. */
-        uint16_t    u16Rsvd0;                   /**< Bits 31:16  - Reserved. */
-        uint32_t    u16DomainOrPasidLo : 16;    /**< Bits 47:32  - D/P: Domain ID or Process Address-Space ID (Lo). */
-        uint32_t    u1GuestOrNested : 1;        /**< Bit  48     - GN: Guest (GPA) or Nested (GVA). */
-        uint32_t    u2Rsvd0 : 2;                /**< Bits 50:49  - Reserved. */
-        uint32_t    u1Interrupt : 1;            /**< Bit  51     - I: Interrupt. */
-        uint32_t    u1Rsvd0 : 1;                /**< Bit  52     - Reserved. */
-        uint32_t    u1ReadWrite : 1;            /**< Bit  53     - RW: Read/Write. */
-        uint32_t    u2Rsvd1 : 2;                /**< Bit  55:54  - Reserved. */
-        uint32_t    u1Translation : 1;          /**< Bit  56     - TR: Translation. */
-        uint32_t    u2Type : 2;                 /**< Bits 58:57  - Type: The type of hardware error. */
-        uint32_t    u1Rsvd1 : 1;                /**< Bit  59     - Reserved. */
-        uint32_t    u4EvtCode : 4;              /**< Bit  63:60  - Event code. */
-        /** @todo r=ramshankar: Figure 55: PAGE_TAB_HARDWARE_ERROR says Addr[31:3] but
-         *        table 58 mentions Addr[31:4], we just use the full 64-bits. Looks like a
-         *        typo in the figure.See AMD AMD IOMMU spec (3.05-PUB, Jan 2020). */
-        uint64_t    u64Addr;                    /** Bits 127:64  - Address: SPA of the page table entry. */
-    } n;
-    /** The 32-bit unsigned integer view. */
-    uint32_t    au32[4];
-    /** The 64-bit unsigned integer view. */
-    uint64_t    au64[2];
-} EVT_PAGE_TAB_HW_ERR_T;
-AssertCompileSize(EVT_PAGE_TAB_HW_ERR_T, 16);
-/** Pointer to a page table hardware error event. */
-typedef EVT_PAGE_TAB_HW_ERR_T *PEVT_PAGE_TAB_HW_ERR_T;
-/** Pointer to a const page table hardware error event. */
-typedef EVT_PAGE_TAB_HW_ERR_T const *PCEVT_PAGE_TAB_HW_ERR_T;
-
-/**
- * Event Log Entry: ILLEGAL_COMMAND_ERROR.
- * In accordance with the AMD spec.
- */
-typedef union
-{
-    struct
-    {
-        uint32_t    u32Rsvd0;           /**< Bits 31:0   - Reserved. */
-        uint32_t    u28Rsvd0 : 28;      /**< Bits 47:32  - Reserved. */
-        uint32_t    u4EvtCode : 4;      /**< Bits 63:60  - Event code. */
-        uint64_t    u64Addr;            /**< Bits 127:64 - Address: SPA of the invalid command. */
-    } n;
-    /** The 32-bit unsigned integer view. */
-    uint32_t    au32[4];
-    /** The 64-bit unsigned integer view. */
-    uint64_t    au64[2];
-} EVT_ILLEGAL_CMD_ERR_T;
-AssertCompileSize(EVT_ILLEGAL_CMD_ERR_T, 16);
-/** Pointer to an illegal command error event. */
-typedef EVT_ILLEGAL_CMD_ERR_T *PEVT_ILLEGAL_CMD_ERR_T;
-/** Pointer to a const illegal command error event. */
-typedef EVT_ILLEGAL_CMD_ERR_T const *PCEVT_ILLEGAL_CMD_ERR_T;
-
-/**
- * Event Log Entry: COMMAND_HARDWARE_ERROR.
- * In accordance with the AMD spec.
- */
-typedef union
-{
-    struct
-    {
-        uint32_t    u32Rsvd0;           /**< Bits 31:0   - Reserved. */
-        uint32_t    u25Rsvd1 : 25;      /**< Bits 56:32  - Reserved. */
-        uint32_t    u2Type : 2;         /**< Bits 58:57  - Type: The type of hardware error. */
-        uint32_t    u1Rsvd1 : 1;        /**< Bit  59     - Reserved. */
-        uint32_t    u4EvtCode : 4;      /**< Bits 63:60  - Event code. */
-        uint64_t    u64Addr;            /**< Bits 128:64 - Address: SPA of the attempted access. */
-    } n;
-    /** The 32-bit unsigned integer view. */
-    uint32_t    au32[4];
-    /** The 64-bit unsigned integer view. */
-    uint64_t    au64[2];
-} EVT_CMD_HW_ERR_T;
-AssertCompileSize(EVT_CMD_HW_ERR_T, 16);
-/** Pointer to a command hardware error event. */
-typedef EVT_CMD_HW_ERR_T *PEVT_CMD_HW_ERR_T;
-/** Pointer to a const command hardware error event. */
-typedef EVT_CMD_HW_ERR_T const *PCEVT_CMD_HW_ERR_T;
-
-/**
- * Event Log Entry: IOTLB_INV_TIMEOUT.
- * In accordance with the AMD spec.
- */
-typedef union
-{
-    struct
-    {
-        uint16_t    u16DevId;           /**< Bits 15:0   - Device ID. */
-        uint16_t    u16Rsvd0;           /**< Bits 31:16  - Reserved.*/
-        uint32_t    u28Rsvd0 : 28;      /**< Bits 59:32  - Reserved. */
-        uint32_t    u4EvtCode : 4;      /**< Bits 63:60  - Event code. */
-        uint32_t    u4Rsvd0 : 4;        /**< Bits 67:64  - Reserved. */
-        uint32_t    u28AddrLo : 28;     /**< Bits 95:68  - Address: SPA of the invalidation command that timedout (Lo). */
-        uint32_t    u32AddrHi;          /**< Bits 127:96 - Address: SPA of the invalidation command that timedout (Hi). */
-    } n;
-    /** The 32-bit unsigned integer view. */
-    uint32_t    au32[4];
-} EVT_IOTLB_INV_TIMEOUT_T;
-AssertCompileSize(EVT_IOTLB_INV_TIMEOUT_T, 16);
-
-/**
- * Event Log Entry: INVALID_DEVICE_REQUEST.
- * In accordance with the AMD spec.
- */
-typedef union
-{
-    struct
-    {
-        uint32_t    u16DevId : 16;          /***< Bits 15:0   - Device ID. */
-        uint32_t    u4PasidHi : 4;          /***< Bits 19:16  - PASID: Process Address-Space ID (Hi). */
-        uint32_t    u12Rsvd0 : 12;          /***< Bits 31:20  - Reserved. */
-        uint32_t    u16PasidLo : 16;        /***< Bits 47:32  - PASID: Process Address-Space ID (Lo). */
-        uint32_t    u1GuestOrNested : 1;    /***< Bit  48     - GN: Guest (GPA) or Nested (GVA). */
-        uint32_t    u1User : 1;             /***< Bit  49     - US: User/Supervisor. */
-        uint32_t    u6Rsvd0 : 6;            /***< Bits 55:50  - Reserved. */
-        uint32_t    u1Translation: 1;       /***< Bit  56     - TR: Translation. */
-        uint32_t    u3Type: 3;              /***< Bits 59:57  - Type: The type of hardware error. */
-        uint32_t    u4EvtCode : 4;          /***< Bits 63:60  - Event code. */
-        uint64_t    u64Addr;                /***< Bits 127:64 - Address: Translation or access address. */
-    } n;
-    /** The 32-bit unsigned integer view. */
-    uint32_t    au32[4];
-} EVT_INVALID_DEV_REQ_T;
-AssertCompileSize(EVT_INVALID_DEV_REQ_T, 16);
-
-/**
- * Event Log Entry: EVENT_COUNTER_ZERO.
- * In accordance with the AMD spec.
- */
-typedef union
-{
-    struct
-    {
-        uint32_t    u32Rsvd0;               /**< Bits 31:0   - Reserved. */
-        uint32_t    u28Rsvd0 : 28;          /**< Bits 59:32  - Reserved. */
-        uint32_t    u4EvtCode : 4;          /**< Bits 63:60  - Event code. */
-        uint32_t    u20CounterNoteHi : 20;  /**< Bits 83:64  - CounterNote: Counter value for the event counter register (Hi). */
-        uint32_t    u12Rsvd0 : 12;          /**< Bits 95:84  - Reserved. */
-        uint32_t    u32CounterNoteLo;       /**< Bits 127:96 - CounterNote: Counter value for the event cuonter register (Lo). */
-    } n;
-    /** The 32-bit unsigned integer view. */
-    uint32_t    au32[4];
-} EVT_EVENT_COUNTER_ZERO_T;
-AssertCompileSize(EVT_EVENT_COUNTER_ZERO_T, 16);
-
-/**
- * IOMMU Capability Header (PCI).
- * In accordance with the AMD spec.
- */
-typedef union
-{
-    struct
-    {
-        uint32_t    u8CapId : 8;        /**< Bits 7:0   - CapId: Capability ID. */
-        uint32_t    u8CapPtr : 8;       /**< Bits 15:8  - CapPtr: Pointer (PCI config offset) to the next capability. */
-        uint32_t    u3CapType : 3;      /**< Bits 18:16 - CapType: Capability Type. */
-        uint32_t    u5CapRev : 5;       /**< Bits 23:19 - CapRev: Capability revision. */
-        uint32_t    u1IoTlbSup : 1;     /**< Bit  24    - IotlbSup: IOTLB Support. */
-        uint32_t    u1HtTunnel : 1;     /**< Bit  25    - HtTunnel: HyperTransport Tunnel translation support. */
-        uint32_t    u1NpCache : 1;      /**< Bit  26    - NpCache: Not Present table entries are cached. */
-        uint32_t    u1EfrSup : 1;       /**< Bit  27    - EFRSup: Extended Feature Register Support. */
-        uint32_t    u1CapExt : 1;       /**< Bit  28    - CapExt: Misc. Information Register 1 Support. */
-        uint32_t    u3Rsvd0 : 3;        /**< Bits 31:29 - Reserved. */
-    } n;
-    /** The 32-bit unsigned integer view. */
-    uint32_t    u32;
-} IOMMU_CAP_HDR_T;
-AssertCompileSize(IOMMU_CAP_HDR_T, 4);
-
-/**
- * IOMMU Base Address (Lo and Hi) Register (PCI).
- * In accordance with the AMD spec.
- */
-typedef union
-{
-    struct
-    {
-        uint32_t   u1Enable : 1;       /**< Bit  1     - Enable: RW1S - Enable IOMMU MMIO region. */
-        uint32_t   u12Rsvd0 : 12;      /**< Bits 13:1  - Reserved. */
-        uint32_t   u18BaseAddrLo : 18; /**< Bits 31:14 - Base address (Lo) of the MMIO region. */
-        uint32_t   u32BaseAddrHi;      /**< Bits 63:32 - Base address (Hi) of the MMIO region. */
-    } n;
-    /** The 32-bit unsigned integer view. */
-    uint32_t    au32[2];
-    /** The 64-bit unsigned integer view. */
-    uint64_t    u64;
-} IOMMU_BAR_T;
-AssertCompileSize(IOMMU_BAR_T, 8);
-#define IOMMU_BAR_VALID_MASK        UINT64_C(0xffffffffffffc001)
-
-/**
- * IOMMU Range Register (PCI).
- * In accordance with the AMD spec.
- */
-typedef union
-{
-    struct
-    {
-        uint32_t    u5HtUnitId : 5;     /**< Bits 4:0   - UnitID: IOMMU HyperTransport Unit ID (not used). */
-        uint32_t    u2Rsvd0 : 2;        /**< Bits 6:5   - Reserved. */
-        uint32_t    u1RangeValid : 1;   /**< Bit  7     - RngValid: Range Valid. */
-        uint32_t    u8Bus : 8;          /**< Bits 15:8  - BusNumber: Bus number of the first and last device. */
-        uint32_t    u8FirstDevice : 8;  /**< Bits 23:16 - FirstDevice: Device and function number of the first device. */
-        uint32_t    u8LastDevice: 8;    /**< Bits 31:24 - LastDevice: Device and function number of the last device. */
-    } n;
-    /** The 32-bit unsigned integer view. */
-    uint32_t    u32;
-} IOMMU_RANGE_T;
-AssertCompileSize(IOMMU_RANGE_T, 4);
-
-/**
- * Device Table Base Address Register (MMIO).
- * In accordance with the AMD spec.
- */
-typedef union
-{
-    struct
-    {
-        RT_GCC_EXTENSION uint64_t   u9Size : 9;     /**< Bits 8:0   - Size: Size of the device table. */
-        RT_GCC_EXTENSION uint64_t   u3Rsvd0 : 3;    /**< Bits 11:9  - Reserved. */
-        RT_GCC_EXTENSION uint64_t   u40Base : 40;   /**< Bits 51:12 - DevTabBase: Device table base address. */
-        RT_GCC_EXTENSION uint64_t   u12Rsvd0 : 12;  /**< Bits 63:52 - Reserved. */
-    } n;
-    /** The 64-bit unsigned integer view. */
-    uint64_t    u64;
-} DEV_TAB_BAR_T;
-AssertCompileSize(DEV_TAB_BAR_T, 8);
-#define IOMMU_DEV_TAB_BAR_VALID_MASK          UINT64_C(0x000ffffffffff1ff)
-#define IOMMU_DEV_TAB_SEG_BAR_VALID_MASK      UINT64_C(0x000ffffffffff0ff)
-
-/**
- * Command Buffer Base Address Register (MMIO).
- * In accordance with the AMD spec.
- */
-typedef union
-{
-    struct
-    {
-        RT_GCC_EXTENSION uint64_t   u12Rsvd0 : 12;      /**< Bits 11:0  - Reserved. */
-        RT_GCC_EXTENSION uint64_t   u40Base : 40;       /**< Bits 51:12 - ComBase: Command buffer base address. */
-        RT_GCC_EXTENSION uint64_t   u4Rsvd0 : 4;        /**< Bits 55:52 - Reserved. */
-        RT_GCC_EXTENSION uint64_t   u4Len : 4;          /**< Bits 59:56 - ComLen: Command buffer length. */
-        RT_GCC_EXTENSION uint64_t   u4Rsvd1 : 4;        /**< Bits 63:60 - Reserved. */
-    } n;
-    /** The 64-bit unsigned integer view. */
-    uint64_t    u64;
-} CMD_BUF_BAR_T;
-AssertCompileSize(CMD_BUF_BAR_T, 8);
-#define IOMMU_CMD_BUF_BAR_VALID_MASK      UINT64_C(0x0f0ffffffffff000)
-
-/**
- * Event Log Base Address Register (MMIO).
- * In accordance with the AMD spec.
- */
-typedef union
-{
-    struct
-    {
-        RT_GCC_EXTENSION uint64_t   u12Rsvd0 : 12;      /**< Bits 11:0  - Reserved. */
-        RT_GCC_EXTENSION uint64_t   u40Base : 40;       /**< Bits 51:12 - EventBase: Event log base address. */
-        RT_GCC_EXTENSION uint64_t   u4Rsvd0 : 4;        /**< Bits 55:52 - Reserved. */
-        RT_GCC_EXTENSION uint64_t   u4Len : 4;          /**< Bits 59:56 - EventLen: Event log length. */
-        RT_GCC_EXTENSION uint64_t   u4Rsvd1 : 4;        /**< Bits 63:60 - Reserved. */
-    } n;
-    /** The 64-bit unsigned integer view. */
-    uint64_t    u64;
-} EVT_LOG_BAR_T;
-AssertCompileSize(EVT_LOG_BAR_T, 8);
-#define IOMMU_EVT_LOG_BAR_VALID_MASK      UINT64_C(0x0f0ffffffffff000)
-
-/**
- * IOMMU Control Register (MMIO).
- * In accordance with the AMD spec.
- */
-typedef union
-{
-    struct
-    {
-        uint32_t    u1IommuEn : 1;               /**< Bit  0     - IommuEn: IOMMU Enable. */
-        uint32_t    u1HtTunEn : 1;               /**< Bit  1     - HtTunEn: HyperTransport Tunnel Enable. */
-        uint32_t    u1EvtLogEn : 1;              /**< Bit  2     - EventLogEn: Event Log Enable. */
-        uint32_t    u1EvtIntrEn : 1;             /**< Bit  3     - EventIntEn: Event Log Interrupt Enable. */
-        uint32_t    u1CompWaitIntrEn : 1;        /**< Bit  4     - ComWaitIntEn: Completion Wait Interrupt Enable. */
-        uint32_t    u3InvTimeOut : 3;            /**< Bits 7:5   - InvTimeOut: Invalidation Timeout. */
-        uint32_t    u1PassPW : 1;                /**< Bit  8     - PassPW: Pass Posted Write. */
-        uint32_t    u1ResPassPW : 1;             /**< Bit  9     - ResPassPW: Response Pass Posted Write. */
-        uint32_t    u1Coherent : 1;              /**< Bit  10    - Coherent: HT read request packet Coherent bit. */
-        uint32_t    u1Isoc : 1;                  /**< Bit  11    - Isoc: HT read request packet Isochronous bit. */
-        uint32_t    u1CmdBufEn : 1;              /**< Bit  12    - CmdBufEn: Command Buffer Enable. */
-        uint32_t    u1PprLogEn : 1;              /**< Bit  13    - PprLogEn: Peripheral Page Request (PPR) Log Enable. */
-        uint32_t    u1PprIntrEn : 1;             /**< Bit  14    - PprIntrEn: Peripheral Page Request Interrupt Enable. */
-        uint32_t    u1PprEn : 1;                 /**< Bit  15    - PprEn: Peripheral Page Request processing Enable. */
-        uint32_t    u1GstTranslateEn : 1;        /**< Bit  16    - GTEn: Guest Translate Enable. */
-        uint32_t    u1GstVirtApicEn : 1;         /**< Bit  17    - GAEn: Guest Virtual-APIC Enable. */
-        uint32_t    u4Crw : 1;                   /**< Bits 21:18 - CRW: Intended for future use (not documented). */
-        uint32_t    u1SmiFilterEn : 1;           /**< Bit  22    - SmiFEn: SMI Filter Enable. */
-        uint32_t    u1SelfWriteBackDis : 1;      /**< Bit  23    - SlfWBDis: Self Write-Back Disable. */
-        uint32_t    u1SmiFilterLogEn : 1;        /**< Bit  24    - SmiFLogEn: SMI Filter Log Enable. */
-        uint32_t    u3GstVirtApicModeEn : 3;     /**< Bits 27:25 - GAMEn: Guest Virtual-APIC Mode Enable. */
-        uint32_t    u1GstLogEn : 1;              /**< Bit  28    - GALogEn: Guest Virtual-APIC GA Log Enable. */
-        uint32_t    u1GstIntrEn : 1;             /**< Bit  29    - GAIntEn: Guest Virtual-APIC Interrupt Enable. */
-        uint32_t    u2DualPprLogEn : 2;          /**< Bits 31:30 - DualPprLogEn: Dual Peripheral Page Request Log Enable. */
-        uint32_t    u2DualEvtLogEn : 2;          /**< Bits 33:32 - DualEventLogEn: Dual Event Log Enable. */
-        uint32_t    u3DevTabSegEn : 3;           /**< Bits 36:34 - DevTblSegEn: Device Table Segment Enable. */
-        uint32_t    u2PrivAbortEn : 2;           /**< Bits 38:37 - PrivAbrtEn: Privilege Abort Enable. */
-        uint32_t    u1PprAutoRespEn : 1;         /**< Bit  39    - PprAutoRspEn: Peripheral Page Request Auto Response Enable. */
-        uint32_t    u1MarcEn : 1;                /**< Bit  40    - MarcEn: Memory Address Routing and Control Enable. */
-        uint32_t    u1BlockStopMarkEn : 1;       /**< Bit  41    - BlkStopMarkEn: Block StopMark messages Enable. */
-        uint32_t    u1PprAutoRespAlwaysOnEn : 1; /**< Bit  42    - PprAutoRspAon:: PPR Auto Response - Always On Enable. */
-        uint32_t    u1DomainIDPNE : 1;           /**< Bit  43    - DomainIDPE: Reserved (not documented). */
-        uint32_t    u1Rsvd0 : 1;                 /**< Bit  44    - Reserved. */
-        uint32_t    u1EnhancedPpr : 1;           /**< Bit  45    - EPHEn: Enhanced Peripheral Page Request Handling Enable. */
-        uint32_t    u2HstAccDirtyBitUpdate : 2;  /**< Bits 47:46 - HADUpdate: Access and Dirty Bit updated in host page table. */
-        uint32_t    u1GstDirtyUpdateDis : 1;     /**< Bit  48    - GDUpdateDis: Disable hardare update of Dirty bit in GPT. */
-        uint32_t    u1Rsvd1 : 1;                 /**< Bit  49    - Reserved. */
-        uint32_t    u1X2ApicEn : 1;              /**< Bit  50    - XTEn: Enable X2APIC. */
-        uint32_t    u1X2ApicIntrGenEn : 1;       /**< Bit  51    - IntCapXTEn: Enable IOMMU X2APIC Interrupt generation. */
-        uint32_t    u2Rsvd0 : 2;                 /**< Bits 53:52 - Reserved. */
-        uint32_t    u1GstAccessUpdateDis : 1;    /**< Bit  54    - GAUpdateDis: Disable hardare update of Access bit in GPT. */
-        uint32_t    u8Rsvd0 : 8;                 /**< Bits 63:55 - Reserved. */
-    } n;
-    /** The 64-bit unsigned integer view. */
-    uint64_t    u64;
-} IOMMU_CTRL_T;
-AssertCompileSize(IOMMU_CTRL_T, 8);
-#define IOMMU_CTRL_VALID_MASK           UINT64_C(0x004defffffffffff)
-#define IOMMU_CTRL_CMD_BUF_EN_MASK      UINT64_C(0x0000000000001001)
-
-/**
- * IOMMU Exclusion Base Register (MMIO).
- * In accordance with the AMD spec.
- */
-typedef union
-{
-    struct
-    {
-        RT_GCC_EXTENSION uint64_t   u1ExclEnable : 1;       /**< Bit 0      - ExEn: Exclusion Range Enable. */
-        RT_GCC_EXTENSION uint64_t   u1AllowAll : 1;         /**< Bit 1      - Allow: Allow All Devices. */
-        RT_GCC_EXTENSION uint64_t   u10Rsvd0 : 10;          /**< Bits 11:2  - Reserved. */
-        RT_GCC_EXTENSION uint64_t   u40ExclRangeBase : 40;  /**< Bits 51:12 - Exclusion Range Base Address. */
-        RT_GCC_EXTENSION uint64_t   u12Rsvd0 : 12;          /**< Bits 63:52 - Reserved. */
-    } n;
-    /** The 64-bit unsigned integer view. */
-    uint64_t    u64;
-} IOMMU_EXCL_RANGE_BAR_T;
-AssertCompileSize(IOMMU_EXCL_RANGE_BAR_T, 8);
-#define IOMMU_EXCL_RANGE_BAR_VALID_MASK     UINT64_C(0x000ffffffffff003)
-
-/**
- * IOMMU Exclusion Range Limit Register (MMIO).
- * In accordance with the AMD spec.
- */
-typedef union
-{
-    struct
-    {
-        RT_GCC_EXTENSION uint64_t   u52ExclLimit : 52;  /**< Bits 51:0 - Exclusion Range Limit (last 12 bits are treated as 1s). */
-        RT_GCC_EXTENSION uint64_t   u12Rsvd1 : 12;      /**< Bits 63:52 - Reserved. */
-    } n;
-    /** The 64-bit unsigned integer view. */
-    uint64_t    u64;
-} IOMMU_EXCL_RANGE_LIMIT_T;
-AssertCompileSize(IOMMU_EXCL_RANGE_LIMIT_T, 8);
-#define IOMMU_EXCL_RANGE_LIMIT_VALID_MASK   UINT64_C(0x000fffffffffffff)
-
-/**
- * IOMMU Extended Feature Register (MMIO).
- * In accordance with the AMD spec.
- */
-typedef union
-{
-    struct
-    {
-        uint32_t    u1PrefetchSup : 1;            /**< Bit  0     - PreFSup: Prefetch Support. */
-        uint32_t    u1PprSup : 1;                 /**< Bit  1     - PPRSup: Peripheral Page Request Support. */
-        uint32_t    u1X2ApicSup : 1;              /**< Bit  2     - XTSup: x2Apic Support. */
-        uint32_t    u1NoExecuteSup : 1;           /**< Bit  3     - NXSup: No-Execute and Privilege Level Support. */
-        uint32_t    u1GstTranslateSup : 1;        /**< Bit  4     - GTSup: Guest Translations (for GVAs) Support. */
-        uint32_t    u1Rsvd0 : 1;                  /**< Bit  5     - Reserved. */
-        uint32_t    u1InvAllSup : 1;              /**< Bit  6     - IASup: Invalidate-All Support. */
-        uint32_t    u1GstVirtApicSup : 1;         /**< Bit  7     - GASup: Guest Virtual-APIC Support. */
-        uint32_t    u1HwErrorSup : 1;             /**< Bit  8     - HESup: Hardware Error registers Support. */
-        uint32_t    u1PerfCounterSup : 1;         /**< Bit  8     - PCSup: Performance Counter Support. */
-        uint32_t    u2HostAddrTranslateSize : 2;  /**< Bits 11:10 - HATS: Host Address Translation Size. */
-        uint32_t    u2GstAddrTranslateSize : 2;   /**< Bits 13:12 - GATS: Guest Address Translation Size. */
-        uint32_t    u2GstCr3RootTblLevel : 2;     /**< Bits 15:14 - GLXSup: Guest CR3 Root Table Level (Max) Size Support. */
-        uint32_t    u2SmiFilterSup : 2;           /**< Bits 17:16 - SmiFSup: SMI Filter Register Support. */
-        uint32_t    u3SmiFilterCount : 3;         /**< Bits 20:18 - SmiFRC: SMI Filter Register Count. */
-        uint32_t    u3GstVirtApicModeSup : 3;     /**< Bits 23:21 - GAMSup: Guest Virtual-APIC Modes Supported. */
-        uint32_t    u2DualPprLogSup : 2;          /**< Bits 25:24 - DualPprLogSup: Dual Peripheral Page Request Log Support. */
-        uint32_t    u2Rsvd0 : 2;                  /**< Bits 27:26 - Reserved. */
-        uint32_t    u2DualEvtLogSup : 2;          /**< Bits 29:28 - DualEventLogSup: Dual Event Log Support. */
-        uint32_t    u2Rsvd1 : 2;                  /**< Bits 31:30 - Reserved. */
-        uint32_t    u5MaxPasidSup : 5;            /**< Bits 36:32 - PASMax: Maximum PASID Supported. */
-        uint32_t    u1UserSupervisorSup : 1;      /**< Bit  37    - USSup: User/Supervisor Page Protection Support. */
-        uint32_t    u2DevTabSegSup : 2;           /**< Bits 39:38 - DevTlbSegSup: Segmented Device Table Support. */
-        uint32_t    u1PprLogOverflowWarn : 1;     /**< Bit  40    - PprOvrflwEarlySup: PPR Log Overflow Early Warning Support. */
-        uint32_t    u1PprAutoRespSup : 1;         /**< Bit  41    - PprAutoRspSup: PPR Automatic Response Support. */
-        uint32_t    u2MarcSup : 2;                /**< Bit  43:42 - MarcSup: Memory Access Routing and Control Support. */
-        uint32_t    u1BlockStopMarkSup : 1;       /**< Bit  44    - BlkStopMarkSup: Block StopMark messages Support. */
-        uint32_t    u1PerfOptSup : 1;             /**< Bit  45    - PerfOptSup: IOMMU Performance Optimization Support. */
-        uint32_t    u1MsiCapMmioSup : 1;          /**< Bit  46    - MsiCapMmioSup: MSI Capability Register MMIO Access Support. */
-        uint32_t    u1Rsvd1 : 1;                  /**< Bit  47    - Reserved. */
-        uint32_t    u1GstIoSup : 1;               /**< Bit  48    - GIoSup: Guest I/O Protection Support. */
-        uint32_t    u1HostAccessSup : 1;          /**< Bit  49    - HASup: Host Access Support. */
-        uint32_t    u1EnhancedPprSup : 1;         /**< Bit  50    - EPHSup: Enhanced Peripheral Page Request Handling Support. */
-        uint32_t    u1AttrForwardSup : 1;         /**< Bit  51    - AttrFWSup: Attribute Forward Support. */
-        uint32_t    u1HostDirtySup : 1;           /**< Bit  52    - HDSup: Host Dirty Support. */
-        uint32_t    u1Rsvd2 : 1;                  /**< Bit  53    - Reserved. */
-        uint32_t    u1InvIoTlbTypeSup : 1;        /**< Bit  54    - InvIotlbTypeSup: Invalidate IOTLB Type Support. */
-        uint32_t    u6Rsvd0 : 6;                  /**< Bit  60:55 - Reserved. */
-        uint32_t    u1GstUpdateDisSup : 1;        /**< Bit  61    - GAUpdateDisSup: Disable hardware update on GPT Support. */
-        uint32_t    u1ForcePhysDstSup : 1;        /**< Bit  62    - ForcePhyDestSup: Force Phys. Dst. Mode for Remapped Intr. */
-        uint32_t    u1Rsvd3 : 1;                  /**< Bit  63    - Reserved. */
-    } n;
-    /** The 64-bit unsigned integer view. */
-    uint64_t    u64;
-} IOMMU_EXT_FEAT_T;
-AssertCompileSize(IOMMU_EXT_FEAT_T, 8);
-
-/**
- * Peripheral Page Request Log Base Address Register (MMIO).
- * In accordance with the AMD spec.
- */
-typedef union
-{
-    struct
-    {
-        RT_GCC_EXTENSION uint64_t   u12Rsvd0 : 12;      /**< Bit 11:0   - Reserved. */
-        RT_GCC_EXTENSION uint64_t   u40Base : 40;       /**< Bits 51:12 - PPRLogBase: Peripheral Page Request Log Base Address. */
-        RT_GCC_EXTENSION uint64_t   u4Rsvd0 : 4;        /**< Bits 55:52 - Reserved. */
-        RT_GCC_EXTENSION uint64_t   u4Len : 4;          /**< Bits 59:56 - PPRLogLen: Peripheral Page Request Log Length. */
-        RT_GCC_EXTENSION uint64_t   u4Rsvd1 : 4;        /**< Bits 63:60 - Reserved. */
-    } n;
-    /** The 64-bit unsigned integer view. */
-    uint64_t    u64;
-} PPR_LOG_BAR_T;
-AssertCompileSize(PPR_LOG_BAR_T, 8);
-#define IOMMU_PPR_LOG_BAR_VALID_MASK    UINT64_C(0x0f0ffffffffff000)
-
-/**
- * IOMMU Hardware Event Upper Register (MMIO).
- * In accordance with the AMD spec.
- */
-typedef union
-{
-    struct
-    {
-        RT_GCC_EXTENSION uint64_t   u60FirstOperand : 60;   /**< Bits 59:0  - First event code dependent operand. */
-        RT_GCC_EXTENSION uint64_t   u4EvtCode : 4;          /**< Bits 63:60 - Event Code. */
-    } n;
-    /** The 64-bit unsigned integer view. */
-    uint64_t    u64;
-} IOMMU_HW_EVT_HI_T;
-AssertCompileSize(IOMMU_HW_EVT_HI_T, 8);
-
-/**
- * IOMMU Hardware Event Lower Register (MMIO).
- * In accordance with the AMD spec.
- */
-typedef uint64_t IOMMU_HW_EVT_LO_T;
-
-/**
- * IOMMU Hardware Event Status (MMIO).
- * In accordance with the AMD spec.
- */
-typedef union
-{
-    struct
-    {
-        uint32_t   u1Valid : 1;     /**< Bit 0      - HEV: Hardware Event Valid. */
-        uint32_t   u1Overflow : 1;  /**< Bit 1      - HEO: Hardware Event Overflow. */
-        uint32_t   u30Rsvd0 : 30;   /**< Bits 31:2  - Reserved. */
-        uint32_t   u32Rsvd0;        /**< Bits 63:32 - Reserved. */
-    } n;
-    /** The 64-bit unsigned integer view. */
-    uint64_t    u64;
-} IOMMU_HW_EVT_STATUS_T;
-AssertCompileSize(IOMMU_HW_EVT_STATUS_T, 8);
-#define IOMMU_HW_EVT_STATUS_VALID_MASK      UINT64_C(0x0000000000000003)
-
-/**
- * Guest Virtual-APIC Log Base Address Register (MMIO).
- * In accordance with the AMD spec.
- */
-typedef union
-{
-    struct
-    {
-        RT_GCC_EXTENSION uint64_t   u12Rsvd0 : 12;  /**< Bit 11:0   - Reserved. */
-        RT_GCC_EXTENSION uint64_t   u40Base : 40;   /**< Bits 51:12 - GALogBase: Guest Virtual-APIC Log Base Address. */
-        RT_GCC_EXTENSION uint64_t   u4Rsvd0 : 4;    /**< Bits 55:52 - Reserved. */
-        RT_GCC_EXTENSION uint64_t   u4Len : 4;      /**< Bits 59:56 - GALogLen: Guest Virtual-APIC Log Length. */
-        RT_GCC_EXTENSION uint64_t   u4Rsvd1 : 4;    /**< Bits 63:60 - Reserved. */
-    } n;
-    /** The 64-bit unsigned integer view. */
-    uint64_t    u64;
-} GALOG_BAR_T;
-AssertCompileSize(GALOG_BAR_T, 8);
-
-/**
- * Guest Virtual-APIC Log Tail Address Register (MMIO).
- * In accordance with the AMD spec.
- */
-typedef union
-{
-    struct
-    {
-        RT_GCC_EXTENSION uint64_t   u3Rsvd0 : 3;            /**< Bits 2:0   - Reserved. */
-        RT_GCC_EXTENSION uint64_t   u40GALogTailAddr : 48;  /**< Bits 51:3  - GATAddr: Guest Virtual-APIC Tail Log Address. */
-        RT_GCC_EXTENSION uint64_t   u11Rsvd1 : 11;          /**< Bits 63:52 - Reserved. */
-    } n;
-    /** The 64-bit unsigned integer view. */
-    uint64_t    u64;
-} GALOG_TAIL_ADDR_T;
-AssertCompileSize(GALOG_TAIL_ADDR_T, 8);
-
-/**
- * PPR Log B Base Address Register (MMIO).
- * In accordance with the AMD spec.
- * Currently identical to PPR_LOG_BAR_T.
- */
-typedef PPR_LOG_BAR_T       PPR_LOG_B_BAR_T;
-
-/**
- * Event Log B Base Address Register (MMIO).
- * In accordance with the AMD spec.
- * Currently identical to EVT_LOG_BAR_T.
- */
-typedef EVT_LOG_BAR_T       EVT_LOG_B_BAR_T;
-
-/**
- * Device-specific Feature Extension (DSFX) Register (MMIO).
- * In accordance with the AMD spec.
- */
-typedef union
-{
-    struct
-    {
-        uint32_t    u24DevSpecFeat : 24;     /**< Bits 23:0  - DevSpecificFeatSupp: Implementation specific features. */
-        uint32_t    u4RevMinor : 4;          /**< Bits 27:24 - RevMinor: Minor revision identifier. */
-        uint32_t    u4RevMajor : 4;          /**< Bits 31:28 - RevMajor: Major revision identifier. */
-        uint32_t    u32Rsvd0;                /**< Bits 63:32 - Reserved.*/
-    } n;
-    /** The 64-bit unsigned integer view. */
-    uint64_t    u64;
-} DEV_SPECIFIC_FEAT_T;
-AssertCompileSize(DEV_SPECIFIC_FEAT_T, 8);
-
-/**
- * Device-specific Control Extension (DSCX) Register (MMIO).
- * In accordance with the AMD spec.
- */
-typedef union
-{
-    struct
-    {
-        uint32_t    u24DevSpecCtrl : 24;     /**< Bits 23:0  - DevSpecificFeatCntrl: Implementation specific control. */
-        uint32_t    u4RevMinor : 4;          /**< Bits 27:24 - RevMinor: Minor revision identifier. */
-        uint32_t    u4RevMajor : 4;          /**< Bits 31:28 - RevMajor: Major revision identifier. */
-        uint32_t    u32Rsvd0;                /**< Bits 63:32 - Reserved.*/
-    } n;
-    /** The 64-bit unsigned integer view. */
-    uint64_t    u64;
-} DEV_SPECIFIC_CTRL_T;
-AssertCompileSize(DEV_SPECIFIC_CTRL_T, 8);
-
-/**
- * Device-specific Status Extension (DSSX) Register (MMIO).
- * In accordance with the AMD spec.
- */
-typedef union
-{
-    struct
-    {
-        uint32_t    u24DevSpecStatus : 24;      /**< Bits 23:0  - DevSpecificFeatStatus: Implementation specific status. */
-        uint32_t    u4RevMinor : 4;             /**< Bits 27:24 - RevMinor: Minor revision identifier. */
-        uint32_t    u4RevMajor : 4;             /**< Bits 31:28 - RevMajor: Major revision identifier. */
-        uint32_t    u32Rsvd0;                   /**< Bits 63:32 - Reserved.*/
-    } n;
-    /** The 64-bit unsigned integer view. */
-    uint64_t    u64;
-} DEV_SPECIFIC_STATUS_T;
-AssertCompileSize(DEV_SPECIFIC_STATUS_T, 8);
-
-/**
- * MSI Information Register 0 and 1 (PCI) / MSI Vector Register 0 and 1 (MMIO).
- * In accordance with the AMD spec.
- */
-typedef union
-{
-    struct
-    {
-        uint32_t    u5MsiNumEvtLog : 5;     /**< Bits 4:0   - MsiNum: Event Log MSI message number. */
-        uint32_t    u3GstVirtAddrSize: 3;   /**< Bits 7:5   - GVAsize: Guest Virtual Address Size. */
-        uint32_t    u7PhysAddrSize : 7;     /**< Bits 14:8  - PAsize: Physical Address Size. */
-        uint32_t    u7VirtAddrSize : 7;     /**< Bits 21:15 - VAsize: Virtual Address Size. */
-        uint32_t    u1HtAtsResv: 1;         /**< Bit  22    - HtAtsResv: HyperTransport ATS Response Address range Reserved. */
-        uint32_t    u4Rsvd0 : 4;            /**< Bits 26:23 - Reserved. */
-        uint32_t    u5MsiNumPpr : 5;        /**< Bits 31:27 - MsiNumPPR: Peripheral Page Request MSI message number. */
-        uint32_t    u5MsiNumGa : 5;         /**< Bits 36:32 - MsiNumGa: MSI message number for guest virtual-APIC log. */
-        uint32_t    u27Rsvd0: 27;           /**< Bits 63:37 - Reserved. */
-    } n;
-    /** The 32-bit unsigned integer view. */
-    uint32_t    au32[2];
-    /** The 64-bit unsigned integer view. */
-    uint64_t    u64;
-} MSI_MISC_INFO_T;
-AssertCompileSize(MSI_MISC_INFO_T, 8);
-/** MSI Vector Register 0 and 1 (MMIO). */
-typedef MSI_MISC_INFO_T       MSI_VECTOR_T;
-
-/**
- * MSI Capability Header Register (PCI + MMIO).
- * In accordance with the AMD spec.
- */
-typedef union
-{
-    struct
-    {
-        uint32_t    u8MsiCapId : 8;         /**< Bits 7:0   - MsiCapId: Capability ID. */
-        uint32_t    u8MsiCapPtr : 8;        /**< Bits 15:8  - MsiCapPtr: Pointer (PCI config offset) to the next capability. */
-        uint32_t    u1MsiEnable : 1;        /**< Bit  16    - MsiEn: Message Signal Interrupt Enable. */
-        uint32_t    u3MsiMultiMessCap : 3;  /**< Bits 19:17 - MsiMultMessCap: MSI Multi-Message Capability. */
-        uint32_t    u3MsiMultiMessEn : 3;   /**< Bits 22:20 - MsiMultMessEn: MSI Multi-Message Enable. */
-        uint32_t    u1Msi64BitEn : 1;       /**< Bit  23    - Msi64BitEn: MSI 64-bit Enable. */
-        uint32_t    u8Rsvd0 : 8;            /**< Bits 31:24 - Reserved. */
-    } n;
-    /** The 32-bit unsigned integer view. */
-    uint32_t    u32;
-} MSI_CAP_HDR_T;
-AssertCompileSize(MSI_CAP_HDR_T, 4);
-#define IOMMU_MSI_CAP_HDR_MSI_EN_MASK       RT_BIT(16)
-
-/**
- * MSI Mapping Capability Header Register (PCI + MMIO).
- * In accordance with the AMD spec.
- */
-typedef union
-{
-    struct
-    {
-        uint32_t    u8MsiMapCapId : 8;  /**< Bits 7:0   - MsiMapCapId: MSI Map capability ID. */
-        uint32_t    u8Rsvd0 : 8;        /**< Bits 15:8  - Reserved. */
-        uint32_t    u1MsiMapEn : 1;     /**< Bit  16    - MsiMapEn: MSI Map enable. */
-        uint32_t    u1MsiMapFixed : 1;  /**< Bit  17    - MsiMapFixd: MSI Map fixed. */
-        uint32_t    u9Rsvd0 : 9;        /**< Bits 26:18 - Reserved. */
-        uint32_t    u5MapCapType : 5;   /**< Bits 31:27 - MsiMapCapType: MSI Mapping capability type. */
-    } n;
-    /** The 32-bit unsigned integer view. */
-    uint32_t    u32;
-} MSI_MAP_CAP_HDR_T;
-AssertCompileSize(MSI_MAP_CAP_HDR_T, 4);
-
-/**
- * Performance Optimization Control Register (MMIO).
- * In accordance with the AMD spec.
- */
-typedef union
-{
-    struct
-    {
-        uint32_t    u13Rsvd0 : 13;      /**< Bits 12:0  - Reserved. */
-        uint32_t    u1PerfOptEn : 1;    /**< Bit  13    - PerfOptEn: Performance Optimization Enable. */
-        uint32_t    u17Rsvd0 : 18;      /**< Bits 31:14 - Reserved. */
-    } n;
-    /** The 32-bit unsigned integer view. */
-    uint32_t    u32;
-} IOMMU_PERF_OPT_CTRL_T;
-AssertCompileSize(IOMMU_PERF_OPT_CTRL_T, 4);
-
-/**
- * XT (x2APIC) IOMMU General Interrupt Control Register (MMIO).
- * In accordance with the AMD spec.
- */
-typedef union
-{
-    struct
-    {
-        uint32_t    u2Rsvd0 : 2;                    /**< Bits 1:0   - Reserved.*/
-        uint32_t    u1X2ApicIntrDstMode : 1;        /**< Bit  2     - Destination Mode for general interrupt.*/
-        uint32_t    u4Rsvd0 : 4;                    /**< Bits 7:3   - Reserved.*/
-        uint32_t    u24X2ApicIntrDstLo : 24;        /**< Bits 31:8  - Destination for general interrupt (Lo).*/
-        uint32_t    u8X2ApicIntrVector : 8;         /**< Bits 39:32 - Vector for general interrupt.*/
-        uint32_t    u1X2ApicIntrDeliveryMode : 1;   /**< Bit  40    - Delivery Mode for general interrupt.*/
-        uint32_t    u15Rsvd0 : 15;                  /**< Bits 55:41 - Reserved.*/
-        uint32_t    u7X2ApicIntrDstHi : 7;          /**< Bits 63:56 - Destination for general interrupt (Hi) .*/
-    } n;
-    /** The 64-bit unsigned integer view. */
-    uint64_t    u64;
-} IOMMU_XT_GEN_INTR_CTRL_T;
-AssertCompileSize(IOMMU_XT_GEN_INTR_CTRL_T, 8);
-
-/**
- * XT (x2APIC) IOMMU General Interrupt Control Register (MMIO).
- * In accordance with the AMD spec.
- */
-typedef union
-{
-    struct
-    {
-        uint32_t    u2Rsvd0 : 2;                    /**< Bits 1:0   - Reserved.*/
-        uint32_t    u1X2ApicIntrDstMode : 1;        /**< Bit  2     - Destination Mode for the interrupt.*/
-        uint32_t    u4Rsvd0 : 4;                    /**< Bits 7:3   - Reserved.*/
-        uint32_t    u24X2ApicIntrDstLo : 24;        /**< Bits 31:8  - Destination for the interrupt (Lo).*/
-        uint32_t    u8X2ApicIntrVector : 8;         /**< Bits 39:32 - Vector for the interrupt.*/
-        uint32_t    u1X2ApicIntrDeliveryMode : 1;   /**< Bit  40    - Delivery Mode for the interrupt.*/
-        uint32_t    u15Rsvd0 : 15;                  /**< Bits 55:41 - Reserved.*/
-        uint32_t    u7X2ApicIntrDstHi : 7;          /**< Bits 63:56 - Destination for the interrupt (Hi) .*/
-    } n;
-    /** The 64-bit unsigned integer view. */
-    uint64_t    u64;
-} IOMMU_XT_INTR_CTRL_T;
-AssertCompileSize(IOMMU_XT_INTR_CTRL_T, 8);
-
-/**
- * XT (x2APIC) IOMMU PPR Interrupt Control Register (MMIO).
- * In accordance with the AMD spec.
- * Currently identical to IOMMU_XT_INTR_CTRL_T.
- */
-typedef IOMMU_XT_INTR_CTRL_T    IOMMU_XT_PPR_INTR_CTRL_T;
-
-/**
- * XT (x2APIC) IOMMU GA (Guest Address) Log Control Register (MMIO).
- * In accordance with the AMD spec.
- * Currently identical to IOMMU_XT_INTR_CTRL_T.
- */
-typedef IOMMU_XT_INTR_CTRL_T    IOMMU_XT_GALOG_INTR_CTRL_T;
-
-/**
- * Memory Access and Routing Control (MARC) Aperture Base Register (MMIO).
- * In accordance with the AMD spec.
- */
-typedef union
-{
-    struct
-    {
-        RT_GCC_EXTENSION uint64_t   u12Rsvd0 : 12;          /**< Bits 11:0  - Reserved. */
-        RT_GCC_EXTENSION uint64_t   u40MarcBaseAddr : 40;   /**< Bits 51:12 - MarcBaseAddr: MARC Aperture Base Address. */
-        RT_GCC_EXTENSION uint64_t   u12Rsvd1 : 12;          /**< Bits 63:52 - Reserved. */
-    } n;
-    /** The 64-bit unsigned integer view. */
-    uint64_t    u64;
-} MARC_APER_BAR_T;
-AssertCompileSize(MARC_APER_BAR_T, 8);
-
-/**
- * Memory Access and Routing Control (MARC) Relocation Register (MMIO).
- * In accordance with the AMD spec.
- */
-typedef union
-{
-    struct
-    {
-        RT_GCC_EXTENSION uint64_t   u1RelocEn : 1;          /**< Bit  0     - RelocEn: Relocation Enabled. */
-        RT_GCC_EXTENSION uint64_t   u1ReadOnly : 1;         /**< Bit  1     - ReadOnly: Whether only read-only acceses allowed. */
-        RT_GCC_EXTENSION uint64_t   u10Rsvd0 : 10;          /**< Bits 11:2  - Reserved. */
-        RT_GCC_EXTENSION uint64_t   u40MarcRelocAddr : 40;  /**< Bits 51:12 - MarcRelocAddr: MARC Aperture Relocation Address. */
-        RT_GCC_EXTENSION uint64_t   u12Rsvd1 : 12;          /**< Bits 63:52 - Reserved. */
-    } n;
-    /** The 64-bit unsigned integer view. */
-    uint64_t    u64;
-} MARC_APER_RELOC_T;
-AssertCompileSize(MARC_APER_RELOC_T, 8);
-
-/**
- * Memory Access and Routing Control (MARC) Length Register (MMIO).
- * In accordance with the AMD spec.
- */
-typedef union
-{
-    struct
-    {
-        RT_GCC_EXTENSION uint64_t   u12Rsvd0 : 12;          /**< Bits 11:0  - Reserved. */
-        RT_GCC_EXTENSION uint64_t   u40MarcLength : 40;     /**< Bits 51:12 - MarcLength: MARC Aperture Length. */
-        RT_GCC_EXTENSION uint64_t   u12Rsvd1 : 12;          /**< Bits 63:52 - Reserved. */
-    } n;
-    /** The 64-bit unsigned integer view. */
-    uint64_t    u64;
-} MARC_APER_LEN_T;
-
-/**
- * Memory Access and Routing Control (MARC) Aperture Register.
- * This combines other registers to match the MMIO layout for convenient access.
- */
-typedef struct
-{
-    MARC_APER_BAR_T     Base;
-    MARC_APER_RELOC_T   Reloc;
-    MARC_APER_LEN_T     Length;
-} MARC_APER_T;
-AssertCompileSize(MARC_APER_T, 24);
-
-/**
- * IOMMU Reserved Register (MMIO).
- * In accordance with the AMD spec.
- * This register is reserved for hardware use (although RW?).
- */
-typedef uint64_t    IOMMU_RSVD_REG_T;
-
-/**
- * Command Buffer Head Pointer Register (MMIO).
- * In accordance with the AMD spec.
- */
-typedef union
-{
-    struct
-    {
-        uint32_t    off;            /**< Bits 31:0  - Buffer pointer (offset; 16 byte aligned, 512 KB max). */
-        uint32_t    u32Rsvd0;       /**< Bits 63:32 - Reserved. */
-    } n;
-    /** The 32-bit unsigned integer view. */
-    uint32_t    au32[2];
-    /** The 64-bit unsigned integer view. */
-    uint64_t    u64;
-} CMD_BUF_HEAD_PTR_T;
-AssertCompileSize(CMD_BUF_HEAD_PTR_T, 8);
-#define IOMMU_CMD_BUF_HEAD_PTR_VALID_MASK       UINT64_C(0x000000000007fff0)
-
-/**
- * Command Buffer Tail Pointer Register (MMIO).
- * In accordance with the AMD spec.
- * Currently identical to CMD_BUF_HEAD_PTR_T.
- */
-typedef CMD_BUF_HEAD_PTR_T    CMD_BUF_TAIL_PTR_T;
-#define IOMMU_CMD_BUF_TAIL_PTR_VALID_MASK       IOMMU_CMD_BUF_HEAD_PTR_VALID_MASK
-
-/**
- * Event Log Head Pointer Register (MMIO).
- * In accordance with the AMD spec.
- * Currently identical to CMD_BUF_HEAD_PTR_T.
- */
-typedef CMD_BUF_HEAD_PTR_T    EVT_LOG_HEAD_PTR_T;
-#define IOMMU_EVT_LOG_HEAD_PTR_VALID_MASK       IOMMU_CMD_BUF_HEAD_PTR_VALID_MASK
-
-/**
- * Event Log Tail Pointer Register (MMIO).
- * In accordance with the AMD spec.
- * Currently identical to CMD_BUF_HEAD_PTR_T.
- */
-typedef CMD_BUF_HEAD_PTR_T    EVT_LOG_TAIL_PTR_T;
-#define IOMMU_EVT_LOG_TAIL_PTR_VALID_MASK       IOMMU_CMD_BUF_HEAD_PTR_VALID_MASK
-
-
-/**
- * IOMMU Status Register (MMIO).
- * In accordance with the AMD spec.
- */
-typedef union
-{
-    struct
-    {
-        uint32_t    u1EvtOverflow : 1;          /**< Bit  0     - EventOverflow: Event log overflow. */
-        uint32_t    u1EvtLogIntr : 1;           /**< Bit  1     - EventLogInt: Event log interrupt. */
-        uint32_t    u1CompWaitIntr : 1;         /**< Bit  2     - ComWaitInt: Completion wait interrupt . */
-        uint32_t    u1EvtLogRunning : 1;        /**< Bit  3     - EventLogRun: Event logging is running. */
-        uint32_t    u1CmdBufRunning : 1;        /**< Bit  4     - CmdBufRun: Command buffer is running. */
-        uint32_t    u1PprOverflow : 1;          /**< Bit  5     - PprOverflow: Peripheral Page Request Log (PPR) overflow. */
-        uint32_t    u1PprIntr : 1;              /**< Bit  6     - PprInt: PPR interrupt. */
-        uint32_t    u1PprLogRunning : 1;        /**< Bit  7     - PprLogRun: PPR logging is running. */
-        uint32_t    u1GstLogRunning : 1;        /**< Bit  8     - GALogRun: Guest virtual-APIC logging is running. */
-        uint32_t    u1GstLogOverflow : 1;       /**< Bit  9     - GALOverflow: Guest virtual-APIC log overflow. */
-        uint32_t    u1GstLogIntr : 1;           /**< Bit  10    - GAInt: Guest virtual-APIC log interrupt. */
-        uint32_t    u1PprOverflowB : 1;         /**< Bit  11    - PprOverflowB: PPR log B overflow. */
-        uint32_t    u1PprLogActive : 1;         /**< Bit  12    - PprLogActive: PPR log A is active. */
-        uint32_t    u2Rsvd0 : 2;                /**< Bits 14:13 - Reserved. */
-        uint32_t    u1EvtOverflowB : 1;         /**< Bit  15    - EvtOverflowB: Event log B overflow. */
-        uint32_t    u1EvtLogActive : 1;         /**< Bit  16    - EvtLogActive: Event log A active. */
-        uint32_t    u1PprOverflowEarlyB : 1;    /**< Bit  17    - PprOverflowEarlyB: PPR log B overflow early warning. */
-        uint32_t    u1PprOverflowEarly : 1;     /**< Bit  18    - PprOverflowEarly: PPR log overflow early warning. */
-        uint32_t    u13Rsvd0 : 13;              /**< Bits 31:19 - Reserved. */
-        uint32_t    u32Rsvd0;                   /**< Bits 63:32 - Reserved . */
-    } n;
-    /** The 32-bit unsigned integer view. */
-    uint32_t    au32[2];
-    /** The 64-bit unsigned integer view. */
-    uint64_t    u64;
-} IOMMU_STATUS_T;
-AssertCompileSize(IOMMU_STATUS_T, 8);
-#define IOMMU_STATUS_VALID_MASK     UINT64_C(0x0000000000079fff)
-#define IOMMU_STATUS_RW1C_MASK      UINT64_C(0x0000000000068e67)
-
-/**
- * PPR Log Head Pointer Register (MMIO).
- * In accordance with the AMD spec.
- * Currently identical to CMD_BUF_HEAD_PTR_T.
- */
-typedef CMD_BUF_HEAD_PTR_T      PPR_LOG_HEAD_PTR_T;
-
-/**
- * PPR Log Tail Pointer Register (MMIO).
- * In accordance with the AMD spec.
- * Currently identical to CMD_BUF_HEAD_PTR_T.
- */
-typedef CMD_BUF_HEAD_PTR_T      PPR_LOG_TAIL_PTR_T;
-
-/**
- * Guest Virtual-APIC Log Head Pointer Register (MMIO).
- * In accordance with the AMD spec.
- */
-typedef union
-{
-    struct
-    {
-        uint32_t    u2Rsvd0 : 2;            /**< Bits 2:0   - Reserved. */
-        uint32_t    u12GALogPtr : 12;       /**< Bits 15:3  - Guest Virtual-APIC Log Head or Tail Pointer. */
-        uint32_t    u16Rsvd0 : 16;          /**< Bits 31:16 - Reserved. */
-        uint32_t    u32Rsvd0;               /**< Bits 63:32 - Reserved. */
-    } n;
-    /** The 32-bit unsigned integer view. */
-    uint32_t    au32[2];
-    /** The 64-bit unsigned integer view. */
-    uint64_t    u64;
-} GALOG_HEAD_PTR_T;
-AssertCompileSize(GALOG_HEAD_PTR_T, 8);
-
-/**
- * Guest Virtual-APIC Log Tail Pointer Register (MMIO).
- * In accordance with the AMD spec.
- * Currently identical to GALOG_HEAD_PTR_T.
- */
-typedef GALOG_HEAD_PTR_T        GALOG_TAIL_PTR_T;
-
-/**
- * PPR Log B Head Pointer Register (MMIO).
- * In accordance with the AMD spec.
- * Currently identical to CMD_BUF_HEAD_PTR_T.
- */
-typedef CMD_BUF_HEAD_PTR_T      PPR_LOG_B_HEAD_PTR_T;
-
-/**
- * PPR Log B Tail Pointer Register (MMIO).
- * In accordance with the AMD spec.
- * Currently identical to CMD_BUF_HEAD_PTR_T.
- */
-typedef CMD_BUF_HEAD_PTR_T      PPR_LOG_B_TAIL_PTR_T;
-
-/**
- * Event Log B Head Pointer Register (MMIO).
- * In accordance with the AMD spec.
- * Currently identical to CMD_BUF_HEAD_PTR_T.
- */
-typedef CMD_BUF_HEAD_PTR_T      EVT_LOG_B_HEAD_PTR_T;
-
-/**
- * Event Log B Tail Pointer Register (MMIO).
- * In accordance with the AMD spec.
- * Currently identical to CMD_BUF_HEAD_PTR_T.
- */
-typedef CMD_BUF_HEAD_PTR_T      EVT_LOG_B_TAIL_PTR_T;
-
-/**
- * PPR Log Auto Response Register (MMIO).
- * In accordance with the AMD spec.
- */
-typedef union
-{
-    struct
-    {
-        uint32_t    u4AutoRespCode : 4;     /**< Bits 3:0   - PprAutoRespCode: PPR log Auto Response Code. */
-        uint32_t    u1AutoRespMaskGen : 1;  /**< Bit  4     - PprAutoRespMaskGn: PPR log Auto Response Mask Gen. */
-        uint32_t    u27Rsvd0 : 27;          /**< Bits 31:5  - Reserved. */
-        uint32_t    u32Rsvd0;               /**< Bits 63:32 - Reserved.*/
-    } n;
-    /** The 32-bit unsigned integer view. */
-    uint32_t    au32[2];
-    /** The 64-bit unsigned integer view. */
-    uint64_t    u64;
-} PPR_LOG_AUTO_RESP_T;
-AssertCompileSize(PPR_LOG_AUTO_RESP_T, 8);
-
-/**
- * PPR Log Overflow Early Indicator Register (MMIO).
- * In accordance with the AMD spec.
- */
-typedef union
-{
-    struct
-    {
-        uint32_t    u15Threshold : 15;  /**< Bits 14:0  - PprOvrflwEarlyThreshold: Overflow early indicator threshold. */
-        uint32_t    u15Rsvd0 : 15;      /**< Bits 29:15 - Reserved. */
-        uint32_t    u1IntrEn : 1;       /**< Bit  30    - PprOvrflwEarlyIntEn: Overflow early indicator interrupt enable. */
-        uint32_t    u1Enable : 1;       /**< Bit  31    - PprOvrflwEarlyEn: Overflow early indicator enable. */
-        uint32_t    u32Rsvd0;           /**< Bits 63:32 - Reserved. */
-    } n;
-    /** The 32-bit unsigned integer view. */
-    uint32_t    au32[2];
-    /** The 64-bit unsigned integer view. */
-    uint64_t    u64;
-} PPR_LOG_OVERFLOW_EARLY_T;
-AssertCompileSize(PPR_LOG_OVERFLOW_EARLY_T, 8);
-
-/**
- * PPR Log B Overflow Early Indicator Register (MMIO).
- * In accordance with the AMD spec.
- * Currently identical to PPR_LOG_OVERFLOW_EARLY_T.
- */
-typedef PPR_LOG_OVERFLOW_EARLY_T        PPR_LOG_B_OVERFLOW_EARLY_T;
-
-/**
- * ILLEGAL_DEV_TABLE_ENTRY Event Types.
- * In accordance with the AMD spec.
- */
-typedef enum EVT_ILLEGAL_DTE_TYPE_T
-{
-    kIllegalDteType_RsvdNotZero = 0,
-    kIllegalDteType_RsvdIntTabLen,
-    kIllegalDteType_RsvdIoCtl,
-    kIllegalDteType_RsvdIntCtl
-} EVT_ILLEGAL_DTE_TYPE_T;
-
-/**
- * ILLEGAL_DEV_TABLE_ENTRY Event Types.
- * In accordance with the AMD spec.
- */
-typedef enum EVT_IO_PAGE_FAULT_TYPE_T
-{
-    /* Memory transaction. */
-    kIoPageFaultType_DteRsvdPagingMode = 0,
-    kIoPageFaultType_PteInvalidPageSize,
-    kIoPageFaultType_PteInvalidLvlEncoding,
-    kIoPageFaultType_SkippedLevelIovaNotZero,
-    kIoPageFaultType_PteRsvdNotZero,
-    kIoPageFaultType_PteValidNotSet,
-    kIoPageFaultType_DteTranslationDisabled,
-    kIoPageFaultType_PasidInvalidRange,
-    kIoPageFaultType_PermDenied,
-    kIoPageFaultType_UserSupervisor,
-    /* Interrupt remapping */
-    kIoPageFaultType_IrteAddrInvalid,
-    kIoPageFaultType_IrteRsvdNotZero,
-    kIoPageFaultType_IrteRemapEn,
-    kIoPageFaultType_IrteRsvdIntType,
-    kIoPageFaultType_IntrReqAborted,
-    kIoPageFaultType_IntrWithPasid,
-    kIoPageFaultType_SmiFilterMismatch,
-    /* Memory transaction or interrupt remapping. */
-    kIoPageFaultType_DevId_Invalid
-} EVT_IO_PAGE_FAULT_TYPE_T;
-
-/**
- * IOTLB_INV_TIMEOUT Event Types.
- * In accordance with the AMD spec.
- */
-typedef enum EVT_IOTLB_INV_TIMEOUT_TYPE_T
-{
-    InvTimeoutType_NoResponse = 0
-} EVT_IOTLB_INV_TIMEOUT_TYPE_T;
-
-/**
- * INVALID_DEVICE_REQUEST Event Types.
- * In accordance with the AMD spec.
- */
-typedef enum EVT_INVALID_DEV_REQ_TYPE_T
-{
-    /* Access. */
-    kInvalidDevReqType_ReadOrNonPostedWrite = 0,
-    kInvalidDevReqType_PretranslatedTransaction,
-    kInvalidDevReqType_PortIo,
-    kInvalidDevReqType_SysMgt,
-    kInvalidDevReqType_IntrRange,
-    kInvalidDevReqType_RsvdIntrRange,
-    kInvalidDevReqType_SysMgtAddr,
-    /* Translation Request. */
-    kInvalidDevReqType_TrAccessInvalid,
-    kInvalidDevReqType_TrDisabled,
-    kInvalidDevReqType_DevIdInvalid,
-} EVT_INVALID_DEV_REQ_TYPE_T;
-
-/**
- * INVALID_PPR_REQUEST Event Types.
- * In accordance with the AMD spec.
- */
-typedef enum EVT_INVALID_PPR_REQ_TYPE_T
-{
-    kInvalidPprReqType_PriNotSupported,
-    kInvalidPprReqType_GstTranslateDisabled
-} EVT_INVALID_PPR_REQ_TYPE_T;
 
 /**
Index: /trunk/src/VBox/Devices/Bus/DevIommuAmd.h
===================================================================
--- /trunk/src/VBox/Devices/Bus/DevIommuAmd.h	(revision 85912)
+++ /trunk/src/VBox/Devices/Bus/DevIommuAmd.h	(revision 85912)
@@ -0,0 +1,53 @@
+/* $Id$ */
+/** @file
+ * DevIommuAmd - I/O Memory Management Unit (AMD), header shared with the IOMMU, ACPI, chipset/firmware code.
+ */
+
+/*
+ * Copyright (C) 2020 Oracle Corporation
+ *
+ * This file is part of VirtualBox Open Source Edition (OSE), as
+ * available from http://www.virtualbox.org. This file is free software;
+ * you can redistribute it and/or modify it under the terms of the GNU
+ * General Public License (GPL) as published by the Free Software
+ * Foundation, in version 2 as it comes in the "COPYING" file of the
+ * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
+ * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
+ */
+
+#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 */
+
Index: /trunk/src/VBox/Devices/Bus/DevPciIch9.cpp
===================================================================
--- /trunk/src/VBox/Devices/Bus/DevPciIch9.cpp	(revision 85911)
+++ /trunk/src/VBox/Devices/Bus/DevPciIch9.cpp	(revision 85912)
@@ -43,4 +43,7 @@
 #include <VBox/AssertGuest.h>
 #include <VBox/msi.h>
+#ifdef VBOX_WITH_IOMMU_AMD
+# include <VBox/iommu-amd.h>
+#endif
 #include <VBox/vmm/pdmdev.h>
 #include <VBox/vmm/mm.h>
@@ -57,4 +60,7 @@
 #include "MsiCommon.h"
 #include "DevPciInternal.h"
+#ifdef VBOX_WITH_IOMMU_AMD
+# include "../Bus/DevIommuAmd.h"
+#endif
 
 
@@ -2250,8 +2256,9 @@
                 /* IOMMU. */
                 uint16_t const uVendorId = devpciR3GetWord(pPciDev, VBOX_PCI_VENDOR_ID);
-                if (uVendorId == 0x1022 /* IOMMU_PCI_VENDOR_ID => AMD. */)
+                if (uVendorId == IOMMU_PCI_VENDOR_ID)
                 {
                     /* AMD. */
-                    devpciR3SetDWord(pDevIns, pPciDev, 0x44, 0xfeb80001); /* set MMIO region address + enable (bit 0). */
+                    devpciR3SetDWord(pDevIns, pPciDev, IOMMU_PCI_OFF_BASE_ADDR_REG_LO,
+                                     IOMMU_MMIO_BASE_ADDR | RT_BIT(0)); /* enable base address (bit 0). */
                 }
                 break;
Index: /trunk/src/VBox/Devices/PC/DevACPI.cpp
===================================================================
--- /trunk/src/VBox/Devices/PC/DevACPI.cpp	(revision 85911)
+++ /trunk/src/VBox/Devices/PC/DevACPI.cpp	(revision 85912)
@@ -37,6 +37,12 @@
 # include <iprt/uuid.h>
 #endif /* IN_RING3 */
+#ifdef VBOX_WITH_IOMMU_AMD
+# include <VBox/iommu-amd.h>
+#endif
 
 #include "VBoxDD.h"
+#ifdef VBOX_WITH_IOMMU_AMD
+# include "../Bus/DevIommuAmd.h"
+#endif
 
 #ifdef LOG_ENABLED
@@ -784,454 +790,4 @@
 
 #ifdef VBOX_WITH_IOMMU_AMD
-/** @name IVRS format revision field.
- * In accordance with the AMD spec.
- * @{ */
-/** Fixed: Supports only pre-assigned device IDs and type 10h and 11h IVHD
- *  blocks. */
-#define ACPI_IVRS_FMT_REV_FIXED                         0x1
-/** Mixed: Supports pre-assigned and ACPI HID device naming and all IVHD blocks. */
-#define ACPI_IVRS_FMT_REV_MIXED                         0x2
-/** @} */
-
-/** @name IVHD special device entry variety field.
- * In accordance with the AMD spec.
- * @{ */
-/** I/O APIC. */
-#define ACPI_IVHD_VARIETY_IOAPIC                        0x1
-/** HPET. */
-#define ACPI_IVHD_VARIETY_HPET                          0x2
-/** @} */
-
-/** @name IVHD device entry type codes.
- * In accordance with the AMD spec.
- * @{ */
-/** Reserved. */
-#define ACPI_IVHD_DEVENTRY_TYPE_RSVD                    0x0
-/** All: DTE setting applies to all Device IDs. */
-#define ACPI_IVHD_DEVENTRY_TYPE_ALL                     0x1
-/** Select: DTE setting applies to the device specified in DevId field. */
-#define ACPI_IVHD_DEVENTRY_TYPE_SELECT                  0x2
-/** Start of range: DTE setting applies to all devices from start of range specified
- *  by the DevId field. */
-#define ACPI_IVHD_DEVENTRY_TYPE_START_RANGE             0x3
-/** End of range: DTE setting from previous type 3 entry applies to all devices
- *  incl. DevId specified by this entry. */
-#define ACPI_IVHD_DEVENTRY_TYPE_END_RANGE               0x4
-/** @} */
-
-/** @name IVHD DTE (Device Table Entry) Settings.
- * In accordance with the AMD spec.
- * @{ */
-/** INITPass: Identifies a device able to assert INIT interrupts. */
-#define ACPI_IVHD_DTE_INIT_PASS_SHIFT                   0
-#define ACPI_IVHD_DTE_INIT_PASS_MASK                    UINT8_C(0x01)
-/** EIntPass: Identifies a device able to assert ExtInt interrupts. */
-#define ACPI_IVHD_DTE_EXTINT_PASS_SHIFT                 1
-#define ACPI_IVHD_DTE_EXTINT_PASS_MASK                  UINT8_C(0x02)
-/** NMIPass: Identifies a device able to assert NMI interrupts. */
-#define ACPI_IVHD_DTE_NMI_PASS_SHIFT                    2
-#define ACPI_IVHD_DTE_NMI_PASS_MASK                     UINT8_C(0x04)
-/** Bit 3 reserved. */
-#define ACPI_IVHD_DTE_RSVD_3_SHIFT                      3
-#define ACPI_IVHD_DTE_RSVD_3_MASK                       UINT8_C(0x08)
-/** SysMgt: Identifies a device able to assert system management messages. */
-#define ACPI_IVHD_DTE_SYS_MGT_SHIFT                     4
-#define ACPI_IVHD_DTE_SYS_MGT_MASK                      UINT8_C(0x30)
-/** Lint0Pass: Identifies a device able to assert LINT0 interrupts. */
-#define ACPI_IVHD_DTE_LINT0_PASS_SHIFT                  6
-#define ACPI_IVHD_DTE_LINT0_PASS_MASK                   UINT8_C(0x40)
-/** Lint0Pass: Identifies a device able to assert LINT1 interrupts. */
-#define ACPI_IVHD_DTE_LINT1_PASS_SHIFT                  7
-#define ACPI_IVHD_DTE_LINT1_PASS_MASK                   UINT8_C(0x80)
-RT_BF_ASSERT_COMPILE_CHECKS(ACPI_IVHD_DTE_, UINT8_C(0), UINT8_MAX,
-                            (INIT_PASS, EXTINT_PASS, NMI_PASS, RSVD_3, SYS_MGT, LINT0_PASS, LINT1_PASS));
-/** @} */
-
-/** AMD IOMMU: IVHD (I/O Virtualization Hardware Definition) Device Entry
- *  (4-byte). In accordance with the AMD spec. */
-typedef struct ACPIIVHDDEVENTRY4
-{
-    uint8_t         u8DevEntryType;     /**< Device entry type. */
-    uint16_t        u16DevId;           /**< Device ID. */
-    uint8_t         u8DteSetting;       /**< DTE (Device Table Entry) setting. */
-} ACPIIVHDDEVENTRY4;
-AssertCompileSize(ACPIIVHDDEVENTRY4, 4);
-
-/** AMD IOMMU: IVHD (I/O Virtualization Hardware Definition) Device Entry
- *  (8-byte). In accordance with the AMD spec. */
-typedef struct ACPIIVHDDEVENTRY8
-{
-    uint8_t         u8DevEntryType;     /**< Device entry type. */
-    union
-    {
-        /** Reserved: When u8DevEntryType is 0x40, 0x41, 0x44 or 0x45 (or 0x49-0x7F). */
-        struct
-        {
-            uint8_t     au8Rsvd0[7];        /**< Reserved (MBZ). */
-        } rsvd;
-        /** Alias Select: When u8DevEntryType is 0x42 or 0x43. */
-        struct
-        {
-            uint16_t    u16DevIdA;          /**< Device ID A. */
-            uint8_t     u8DteSetting;       /**< DTE (Device Table Entry) setting. */
-            uint8_t     u8Rsvd0;            /**< Reserved (MBZ). */
-            uint16_t    u16DevIdB;          /**< Device ID B. */
-            uint8_t     u8Rsvd1;            /**< Reserved (MBZ). */
-        } alias;
-        /** Extended Select: When u8DevEntryType is 0x46 or 0x47. */
-        struct
-        {
-            uint16_t    u16DevId;           /**< Device ID. */
-            uint8_t     u8DteSetting;       /**< DTE (Device Table Entry) setting. */
-            uint32_t    u32ExtDteSetting;   /**< Extended DTE setting. */
-        } ext;
-        /** Special Device: When u8DevEntryType is 0x48. */
-        struct
-        {
-            uint16_t    u16Rsvd0;           /**< Reserved (MBZ). */
-            uint8_t     u8DteSetting;       /**< DTE (Device Table Entry) setting. */
-            uint8_t     u8Handle;           /**< Handle contains I/O APIC ID or HPET number. */
-            uint16_t    u16DevIdB;          /**< Device ID B (I/O APIC or HPET). */
-            uint8_t     u8Variety;          /**< Whether this is the HPET or I/O APIC. */
-        } special;
-    } u;
-} ACPIIVHDDEVENTRY8;
-AssertCompileSize(ACPIIVHDDEVENTRY8, 8);
-
-/** @name IVHD Type 10h Flags.
- * In accordance with the AMD spec.
- * @{ */
-/** Peripheral page request support. */
-#define ACPI_IVHD_10H_F_PPR_SUP                         RT_BIT(7)
-/** Prefetch IOMMU pages command support. */
-#define ACPI_IVHD_10H_F_PREF_SUP                        RT_BIT(6)
-/** Coherent control. */
-#define ACPI_IVHD_10H_F_COHERENT                        RT_BIT(5)
-/** Remote IOTLB support. */
-#define ACPI_IVHD_10H_F_IOTLB_SUP                       RT_BIT(4)
-/** Isochronous control. */
-#define ACPI_IVHD_10H_F_ISOC                            RT_BIT(3)
-/** Response Pass Posted Write. */
-#define ACPI_IVHD_10H_F_RES_PASS_PW                     RT_BIT(2)
-/** Pass Posted Write. */
-#define ACPI_IVHD_10H_F_PASS_PW                         RT_BIT(1)
-/** HyperTransport Tunnel. */
-#define ACPI_IVHD_10H_F_HT_TUNNEL                       RT_BIT(0)
-/** @} */
-
-/** @name IVRS IVinfo field.
- * In accordance with the AMD spec.
- * @{ */
-/** EFRSup: Extended Feature Support. */
-#define ACPI_IVINFO_BF_EFR_SUP_SHIFT                    0
-#define ACPI_IVINFO_BF_EFR_SUP_MASK                     UINT32_C(0x00000001)
-/** DMA Remap Sup: DMA remapping support (pre-boot DMA protection with
- *  mandatory remapping of device accessed memory). */
-#define ACPI_IVINFO_BF_DMA_REMAP_SUP_SHIFT              1
-#define ACPI_IVINFO_BF_DMA_REMAP_SUP_MASK               UINT32_C(0x00000002)
-/** Bits 4:2 reserved. */
-#define ACPI_IVINFO_BF_RSVD_2_4_SHIFT                   2
-#define ACPI_IVINFO_BF_RSVD_2_4_MASK                    UINT32_C(0x0000001c)
-/** GVASize: Guest virtual-address size. */
-#define ACPI_IVINFO_BF_GVA_SIZE_SHIFT                   5
-#define ACPI_IVINFO_BF_GVA_SIZE_MASK                    UINT32_C(0x000000e0)
-/** PASize: System physical address size. */
-#define ACPI_IVINFO_BF_PA_SIZE_SHIFT                    8
-#define ACPI_IVINFO_BF_PA_SIZE_MASK                     UINT32_C(0x00007f00)
-/** VASize: Virtual address size. */
-#define ACPI_IVINFO_BF_VA_SIZE_SHIFT                    15
-#define ACPI_IVINFO_BF_VA_SIZE_MASK                     UINT32_C(0x003f8000)
-/** HTAtsResv: HyperTransport ATS-response address translation range reserved. */
-#define ACPI_IVINFO_BF_HT_ATS_RESV_SHIFT                22
-#define ACPI_IVINFO_BF_HT_ATS_RESV_MASK                 UINT32_C(0x00400000)
-/** Bits 31:23 reserved. */
-#define ACPI_IVINFO_BF_RSVD_23_31_SHIFT                 23
-#define ACPI_IVINFO_BF_RSVD_23_31_MASK                  UINT32_C(0xff800000)
-RT_BF_ASSERT_COMPILE_CHECKS(ACPI_IVINFO_BF_, UINT32_C(0), UINT32_MAX,
-                            (EFR_SUP, DMA_REMAP_SUP, RSVD_2_4, GVA_SIZE, PA_SIZE, VA_SIZE, HT_ATS_RESV, RSVD_23_31));
-/** @} */
-
-/** @name IVHD IOMMU info flags.
- * In accordance with the AMD spec.
- * @{ */
-/** MSI message number for the event log. */
-#define ACPI_IOMMU_INFO_BF_MSI_NUM_SHIFT                0
-#define ACPI_IOMMU_INFO_BF_MSI_NUM_MASK                 UINT16_C(0x001f)
-/** Bits 7:5 reserved. */
-#define ACPI_IOMMU_INFO_BF_RSVD_5_7_SHIFT               5
-#define ACPI_IOMMU_INFO_BF_RSVD_5_7_MASK                UINT16_C(0x00e0)
-/** IOMMU HyperTransport Unit ID number. */
-#define ACPI_IOMMU_INFO_BF_UNIT_ID_SHIFT                8
-#define ACPI_IOMMU_INFO_BF_UNIT_ID_MASK                 UINT16_C(0x1f00)
-/** Bits 15:13 reserved. */
-#define ACPI_IOMMU_INFO_BF_RSVD_13_15_SHIFT             13
-#define ACPI_IOMMU_INFO_BF_RSVD_13_15_MASK              UINT16_C(0xe000)
-RT_BF_ASSERT_COMPILE_CHECKS(ACPI_IOMMU_INFO_BF_, UINT16_C(0), UINT16_MAX,
-                            (MSI_NUM, RSVD_5_7, UNIT_ID, RSVD_13_15));
-/** @} */
-
-/** @name IVHD IOMMU feature reporting field.
- * In accordance with the AMD spec.
- * @{ */
-/** x2APIC supported for peripherals. */
-#define ACPI_IOMMU_FEAT_BF_XT_SUP_SHIFT                 0
-#define ACPI_IOMMU_FEAT_BF_XT_SUP_MASK                  UINT32_C(0x00000001)
-/** NX supported for I/O. */
-#define ACPI_IOMMU_FEAT_BF_NX_SUP_SHIFT                 1
-#define ACPI_IOMMU_FEAT_BF_NX_SUP_MASK                  UINT32_C(0x00000002)
-/** GT (Guest Translation) supported. */
-#define ACPI_IOMMU_FEAT_BF_GT_SUP_SHIFT                 2
-#define ACPI_IOMMU_FEAT_BF_GT_SUP_MASK                  UINT32_C(0x00000004)
-/** GLX (Number of guest CR3 tables) supported. */
-#define ACPI_IOMMU_FEAT_BF_GLX_SUP_SHIFT                3
-#define ACPI_IOMMU_FEAT_BF_GLX_SUP_MASK                 UINT32_C(0x00000018)
-/** IA (INVALIDATE_IOMMU_ALL) command supported. */
-#define ACPI_IOMMU_FEAT_BF_IA_SUP_SHIFT                 5
-#define ACPI_IOMMU_FEAT_BF_IA_SUP_MASK                  UINT32_C(0x00000020)
-/** GA (Guest virtual APIC) supported. */
-#define ACPI_IOMMU_FEAT_BF_GA_SUP_SHIFT                 6
-#define ACPI_IOMMU_FEAT_BF_GA_SUP_MASK                  UINT32_C(0x00000040)
-/** HE (Hardware error) registers supported. */
-#define ACPI_IOMMU_FEAT_BF_HE_SUP_SHIFT                 7
-#define ACPI_IOMMU_FEAT_BF_HE_SUP_MASK                  UINT32_C(0x00000080)
-/** PASMax (maximum PASID) supported. Ignored if PPRSup=0. */
-#define ACPI_IOMMU_FEAT_BF_PAS_MAX_SHIFT                8
-#define ACPI_IOMMU_FEAT_BF_PAS_MAX_MASK                 UINT32_C(0x00001f00)
-/** PNCounters (Number of performance counters per counter bank) supported. */
-#define ACPI_IOMMU_FEAT_BF_PN_COUNTERS_SHIFT            13
-#define ACPI_IOMMU_FEAT_BF_PN_COUNTERS_MASK             UINT32_C(0x0001e000)
-/** PNBanks (Number of performance counter banks) supported. */
-#define ACPI_IOMMU_FEAT_BF_PN_BANKS_SHIFT               17
-#define ACPI_IOMMU_FEAT_BF_PN_BANKS_MASK                UINT32_C(0x007e0000)
-/** MSINumPPR (MSI number for peripheral page requests). */
-#define ACPI_IOMMU_FEAT_BF_MSI_NUM_PPR_SHIFT            23
-#define ACPI_IOMMU_FEAT_BF_MSI_NUM_PPR_MASK             UINT32_C(0x0f800000)
-/** GATS (Guest address translation size). MBZ when GTSup=0. */
-#define ACPI_IOMMU_FEAT_BF_GATS_SHIFT                   28
-#define ACPI_IOMMU_FEAT_BF_GATS_MASK                    UINT32_C(0x30000000)
-/** HATS (Host address translation size). */
-#define ACPI_IOMMU_FEAT_BF_HATS_SHIFT                   30
-#define ACPI_IOMMU_FEAT_BF_HATS_MASK                    UINT32_C(0xc0000000)
-RT_BF_ASSERT_COMPILE_CHECKS(ACPI_IOMMU_FEAT_BF_, UINT32_C(0), UINT32_MAX,
-                            (XT_SUP, NX_SUP, GT_SUP, GLX_SUP, IA_SUP, GA_SUP, HE_SUP, PAS_MAX, PN_COUNTERS, PN_BANKS,
-                             MSI_NUM_PPR, GATS, HATS));
-/** @} */
-
-/** @name IOMMU Extended Feature Register (PCI/MMIO/ACPI).
- * In accordance with the AMD spec.
- * @{ */
-/** PreFSup: Prefetch support (RO).   */
-#define IOMMU_EXT_FEAT_BF_PREF_SUP_SHIFT                0
-#define IOMMU_EXT_FEAT_BF_PREF_SUP_MASK                 UINT64_C(0x0000000000000001)
-/** PPRSup: Peripheral Page Request (PPR) support (RO). */
-#define IOMMU_EXT_FEAT_BF_PPR_SUP_SHIFT                 1
-#define IOMMU_EXT_FEAT_BF_PPR_SUP_MASK                  UINT64_C(0x0000000000000002)
-/** XTSup: x2APIC support (RO). */
-#define IOMMU_EXT_FEAT_BF_X2APIC_SUP_SHIFT              2
-#define IOMMU_EXT_FEAT_BF_X2APIC_SUP_MASK               UINT64_C(0x0000000000000004)
-/** NXSup: No Execute (PMR and PRIV) support (RO). */
-#define IOMMU_EXT_FEAT_BF_NO_EXEC_SUP_SHIFT             3
-#define IOMMU_EXT_FEAT_BF_NO_EXEC_SUP_MASK              UINT64_C(0x0000000000000008)
-/** GTSup: Guest Translation support (RO). */
-#define IOMMU_EXT_FEAT_BF_GT_SUP_SHIFT                  4
-#define IOMMU_EXT_FEAT_BF_GT_SUP_MASK                   UINT64_C(0x0000000000000010)
-/** Bit 5 reserved. */
-#define IOMMU_EXT_FEAT_BF_RSVD_5_SHIFT                  5
-#define IOMMU_EXT_FEAT_BF_RSVD_5_MASK                   UINT64_C(0x0000000000000020)
-/** IASup: INVALIDATE_IOMMU_ALL command support (RO). */
-#define IOMMU_EXT_FEAT_BF_IA_SUP_SHIFT                  6
-#define IOMMU_EXT_FEAT_BF_IA_SUP_MASK                   UINT64_C(0x0000000000000040)
-/** GASup: Guest virtual-APIC support (RO). */
-#define IOMMU_EXT_FEAT_BF_GA_SUP_SHIFT                  7
-#define IOMMU_EXT_FEAT_BF_GA_SUP_MASK                   UINT64_C(0x0000000000000080)
-/** HESup: Hardware error registers support (RO). */
-#define IOMMU_EXT_FEAT_BF_HE_SUP_SHIFT                  8
-#define IOMMU_EXT_FEAT_BF_HE_SUP_MASK                   UINT64_C(0x0000000000000100)
-/** PCSup: Performance counters support (RO). */
-#define IOMMU_EXT_FEAT_BF_PC_SUP_SHIFT                  9
-#define IOMMU_EXT_FEAT_BF_PC_SUP_MASK                   UINT64_C(0x0000000000000200)
-/** HATS: Host Address Translation Size (RO). */
-#define IOMMU_EXT_FEAT_BF_HATS_SHIFT                    10
-#define IOMMU_EXT_FEAT_BF_HATS_MASK                     UINT64_C(0x0000000000000c00)
-/** GATS: Guest Address Translation Size (RO). */
-#define IOMMU_EXT_FEAT_BF_GATS_SHIFT                    12
-#define IOMMU_EXT_FEAT_BF_GATS_MASK                     UINT64_C(0x0000000000003000)
-/** GLXSup: Guest CR3 root table level support  (RO). */
-#define IOMMU_EXT_FEAT_BF_GLX_SUP_SHIFT                 14
-#define IOMMU_EXT_FEAT_BF_GLX_SUP_MASK                  UINT64_C(0x000000000000c000)
-/** SmiFSup: SMI filter register support  (RO). */
-#define IOMMU_EXT_FEAT_BF_SMI_FLT_SUP_SHIFT             16
-#define IOMMU_EXT_FEAT_BF_SMI_FLT_SUP_MASK              UINT64_C(0x0000000000030000)
-/** SmiFRC: SMI filter register count  (RO). */
-#define IOMMU_EXT_FEAT_BF_SMI_FLT_REG_CNT_SHIFT         18
-#define IOMMU_EXT_FEAT_BF_SMI_FLT_REG_CNT_MASK          UINT64_C(0x00000000001c0000)
-/** GAMSup: Guest virtual-APIC modes support (RO). */
-#define IOMMU_EXT_FEAT_BF_GAM_SUP_SHIFT                 21
-#define IOMMU_EXT_FEAT_BF_GAM_SUP_MASK                  UINT64_C(0x0000000000e00000)
-/** DualPprLogSup: Dual PPR Log support (RO). */
-#define IOMMU_EXT_FEAT_BF_DUAL_PPR_LOG_SUP_SHIFT        24
-#define IOMMU_EXT_FEAT_BF_DUAL_PPR_LOG_SUP_MASK         UINT64_C(0x0000000003000000)
-/** Bits 27:26 reserved. */
-#define IOMMU_EXT_FEAT_BF_RSVD_26_27_SHIFT              26
-#define IOMMU_EXT_FEAT_BF_RSVD_26_27_MASK               UINT64_C(0x000000000c000000)
-/** DualEventLogSup: Dual Event Log support (RO). */
-#define IOMMU_EXT_FEAT_BF_DUAL_EVT_LOG_SUP_SHIFT        28
-#define IOMMU_EXT_FEAT_BF_DUAL_EVT_LOG_SUP_MASK         UINT64_C(0x0000000030000000)
-/** Bits 31:30 reserved. */
-#define IOMMU_EXT_FEAT_BF_RSVD_30_31_SHIFT              30
-#define IOMMU_EXT_FEAT_BF_RSVD_30_31_MASK               UINT64_C(0x00000000c0000000)
-/** PASMax: Maximum PASID support (RO). */
-#define IOMMU_EXT_FEAT_BF_PASID_MAX_SHIFT               32
-#define IOMMU_EXT_FEAT_BF_PASID_MAX_MASK                UINT64_C(0x0000001f00000000)
-/** USSup: User/Supervisor support (RO). */
-#define IOMMU_EXT_FEAT_BF_US_SUP_SHIFT                  37
-#define IOMMU_EXT_FEAT_BF_US_SUP_MASK                   UINT64_C(0x0000002000000000)
-/** DevTblSegSup: Segmented Device Table support (RO). */
-#define IOMMU_EXT_FEAT_BF_DEV_TBL_SEG_SUP_SHIFT         38
-#define IOMMU_EXT_FEAT_BF_DEV_TBL_SEG_SUP_MASK          UINT64_C(0x000000c000000000)
-/** PprOverflwEarlySup: PPR Log Overflow Early warning support (RO). */
-#define IOMMU_EXT_FEAT_BF_PPR_OVERFLOW_EARLY_SHIFT      40
-#define IOMMU_EXT_FEAT_BF_PPR_OVERFLOW_EARLY_MASK       UINT64_C(0x0000010000000000)
-/** PprAutoRspSup: PPR Automatic Response support (RO). */
-#define IOMMU_EXT_FEAT_BF_PPR_AUTO_RES_SUP_SHIFT        41
-#define IOMMU_EXT_FEAT_BF_PPR_AUTO_RES_SUP_MASK         UINT64_C(0x0000020000000000)
-/** MarcSup: Memory Access and Routing (MARC) support (RO). */
-#define IOMMU_EXT_FEAT_BF_MARC_SUP_SHIFT                42
-#define IOMMU_EXT_FEAT_BF_MARC_SUP_MASK                 UINT64_C(0x00000c0000000000)
-/** BlkStopMrkSup: Block StopMark message support (RO). */
-#define IOMMU_EXT_FEAT_BF_BLKSTOP_MARK_SUP_SHIFT        44
-#define IOMMU_EXT_FEAT_BF_BLKSTOP_MARK_SUP_MASK         UINT64_C(0x0000100000000000)
-/** PerfOptSup: IOMMU Performance Optimization support (RO). */
-#define IOMMU_EXT_FEAT_BF_PERF_OPT_SUP_SHIFT            45
-#define IOMMU_EXT_FEAT_BF_PERF_OPT_SUP_MASK             UINT64_C(0x0000200000000000)
-/** MsiCapMmioSup: MSI-Capability Register MMIO access support (RO). */
-#define IOMMU_EXT_FEAT_BF_MSI_CAP_MMIO_SUP_SHIFT        46
-#define IOMMU_EXT_FEAT_BF_MSI_CAP_MMIO_SUP_MASK         UINT64_C(0x0000400000000000)
-/** Bit 47 reserved. */
-#define IOMMU_EXT_FEAT_BF_RSVD_47_SHIFT                 47
-#define IOMMU_EXT_FEAT_BF_RSVD_47_MASK                  UINT64_C(0x0000800000000000)
-/** GIoSup: Guest I/O Protection support (RO). */
-#define IOMMU_EXT_FEAT_BF_GST_IO_PROT_SUP_SHIFT         48
-#define IOMMU_EXT_FEAT_BF_GST_IO_PROT_SUP_MASK          UINT64_C(0x0001000000000000)
-/** HASup: Host Access support (RO). */
-#define IOMMU_EXT_FEAT_BF_HST_ACCESS_SUP_SHIFT          49
-#define IOMMU_EXT_FEAT_BF_HST_ACCESS_SUP_MASK           UINT64_C(0x0002000000000000)
-/** EPHSup: Enhandled PPR Handling support (RO). */
-#define IOMMU_EXT_FEAT_BF_ENHANCED_PPR_SUP_SHIFT        50
-#define IOMMU_EXT_FEAT_BF_ENHANCED_PPR_SUP_MASK         UINT64_C(0x0004000000000000)
-/** AttrFWSup: Attribute Forward support (RO). */
-#define IOMMU_EXT_FEAT_BF_ATTR_FW_SUP_SHIFT             51
-#define IOMMU_EXT_FEAT_BF_ATTR_FW_SUP_MASK              UINT64_C(0x0008000000000000)
-/** HDSup: Host Dirty Support (RO). */
-#define IOMMU_EXT_FEAT_BF_HST_DIRTY_SUP_SHIFT           52
-#define IOMMU_EXT_FEAT_BF_HST_DIRTY_SUP_MASK            UINT64_C(0x0010000000000000)
-/** Bit 53 reserved. */
-#define IOMMU_EXT_FEAT_BF_RSVD_53_SHIFT                 53
-#define IOMMU_EXT_FEAT_BF_RSVD_53_MASK                  UINT64_C(0x0020000000000000)
-/** InvIotlbTypeSup: Invalidate IOTLB type support (RO). */
-#define IOMMU_EXT_FEAT_BF_INV_IOTLB_TYPE_SUP_SHIFT      54
-#define IOMMU_EXT_FEAT_BF_INV_IOTLB_TYPE_SUP_MASK       UINT64_C(0x0040000000000000)
-/** Bits 60:55 reserved. */
-#define IOMMU_EXT_FEAT_BF_RSVD_55_60_SHIFT              55
-#define IOMMU_EXT_FEAT_BF_RSVD_55_60_MASK               UINT64_C(0x1f80000000000000)
-/** GAUpdateDisSup: Support disabling hardware update on guest page table access
- *  (RO). */
-#define IOMMU_EXT_FEAT_BF_GA_UPDATE_DIS_SUP_SHIFT       61
-#define IOMMU_EXT_FEAT_BF_GA_UPDATE_DIS_SUP_MASK        UINT64_C(0x2000000000000000)
-/** ForcePhysDestSup: Force Physical Destination Mode for Remapped Interrupt
- *  support (RO). */
-#define IOMMU_EXT_FEAT_BF_FORCE_PHYS_DST_SUP_SHIFT      62
-#define IOMMU_EXT_FEAT_BF_FORCE_PHYS_DST_SUP_MASK       UINT64_C(0x4000000000000000)
-/** Bit 63 reserved. */
-#define IOMMU_EXT_FEAT_BF_RSVD_63_SHIFT                 63
-#define IOMMU_EXT_FEAT_BF_RSVD_63_MASK                  UINT64_C(0x8000000000000000)
-RT_BF_ASSERT_COMPILE_CHECKS(IOMMU_EXT_FEAT_BF_, UINT64_C(0), UINT64_MAX,
-                            (PREF_SUP, PPR_SUP, X2APIC_SUP, NO_EXEC_SUP, GT_SUP, RSVD_5, IA_SUP, GA_SUP, HE_SUP, PC_SUP,
-                             HATS, GATS, GLX_SUP, SMI_FLT_SUP, SMI_FLT_REG_CNT, GAM_SUP, DUAL_PPR_LOG_SUP, RSVD_26_27,
-                             DUAL_EVT_LOG_SUP, RSVD_30_31, PASID_MAX, US_SUP, DEV_TBL_SEG_SUP, PPR_OVERFLOW_EARLY,
-                             PPR_AUTO_RES_SUP, MARC_SUP, BLKSTOP_MARK_SUP, PERF_OPT_SUP, MSI_CAP_MMIO_SUP, RSVD_47,
-                             GST_IO_PROT_SUP, HST_ACCESS_SUP, ENHANCED_PPR_SUP, ATTR_FW_SUP, HST_DIRTY_SUP, RSVD_53,
-                             INV_IOTLB_TYPE_SUP, RSVD_55_60, GA_UPDATE_DIS_SUP, FORCE_PHYS_DST_SUP, RSVD_63));
-/** @} */
-
-/** IVHD (I/O Virtualization Hardware Definition) Type 10h.
- *  In accordance with the AMD spec. */
-typedef struct ACPIIVHDTYPE10
-{
-    uint8_t         u8Type;                 /**< Type: Must be 0x10. */
-    uint8_t         u8Flags;                /**< Flags (see ACPI_IVHD_10H_F_XXX). */
-    uint16_t        u16Length;              /**< Length of IVHD including IVHD device entries. */
-    uint16_t        u16DeviceId;            /**< Device ID of the IOMMU. */
-    uint16_t        u16CapOffset;           /**< Offset in Capability space for control fields of IOMMU. */
-    uint64_t        u64BaseAddress;         /**< Base address of IOMMU control registers in MMIO space. */
-    uint16_t        u16PciSegmentGroup;     /**< PCI segment group number. */
-    uint16_t        u16IommuInfo;           /**< Interrupt number and Unit ID. */
-    uint32_t        u32Features;            /**< IOMMU feature reporting. */
-    /* IVHD device entry block follows. */
-} ACPIIVHDTYPE10;
-AssertCompileSize(ACPIIVHDTYPE10, 24);
-
-/** @name IVHD Type 11h Flags.
- * In accordance with the AMD spec.
- * @{ */
-/** Coherent control. */
-#define ACPI_IVHD_11H_F_COHERENT                        RT_BIT(5)
-/** Remote IOTLB support. */
-#define ACPI_IVHD_11H_F_IOTLB_SUP                       RT_BIT(4)
-/** Isochronous control. */
-#define ACPI_IVHD_11H_F_ISOC                            RT_BIT(3)
-/** Response Pass Posted Write. */
-#define ACPI_IVHD_11H_F_RES_PASS_PW                     RT_BIT(2)
-/** Pass Posted Write. */
-#define ACPI_IVHD_11H_F_PASS_PW                         RT_BIT(1)
-/** HyperTransport Tunnel. */
-#define ACPI_IVHD_11H_F_HT_TUNNEL                       RT_BIT(0)
-/** @} */
-
-/** @name IVHD IOMMU Type 11 Attributes field.
- * In accordance with the AMD spec.
- * @{ */
-/** Bits 12:0 reserved. */
-#define ACPI_IOMMU_ATTR_BF_RSVD_0_12_SHIFT              0
-#define ACPI_IOMMU_ATTR_BF_RSVD_0_12_MASK               UINT32_C(0x00001fff)
-/** PNCounters: Number of performance counters per counter bank. */
-#define ACPI_IOMMU_ATTR_BF_PN_COUNTERS_SHIFT            13
-#define ACPI_IOMMU_ATTR_BF_PN_COUNTERS_MASK             UINT32_C(0x0001e000)
-/** PNBanks: Number of performance counter banks. */
-#define ACPI_IOMMU_ATTR_BF_PN_BANKS_SHIFT               17
-#define ACPI_IOMMU_ATTR_BF_PN_BANKS_MASK                UINT32_C(0x007e0000)
-/** MSINumPPR: MSI number for peripheral page requests (PPR). */
-#define ACPI_IOMMU_ATTR_BF_MSI_NUM_PPR_SHIFT            23
-#define ACPI_IOMMU_ATTR_BF_MSI_NUM_PPR_MASK             UINT32_C(0x0f800000)
-/** Bits 31:28 reserved. */
-#define ACPI_IOMMU_ATTR_BF_RSVD_28_31_SHIFT             28
-#define ACPI_IOMMU_ATTR_BF_RSVD_28_31_MASK              UINT32_C(0xf0000000)
-RT_BF_ASSERT_COMPILE_CHECKS(ACPI_IOMMU_ATTR_BF_, UINT32_C(0), UINT32_MAX,
-                            (RSVD_0_12, PN_COUNTERS, PN_BANKS, MSI_NUM_PPR, RSVD_28_31));
-/** @} */
-
-/** AMD IOMMU: IVHD (I/O Virtualization Hardware Definition) Type 11h.
- *  In accordance with the AMD spec. */
-typedef struct ACPIIVHDTYPE11
-{
-    uint8_t         u8Type;                 /**< Type: Must be 0x11. */
-    uint8_t         u8Flags;                /**< Flags. */
-    uint16_t        u16Length;              /**< Length: Size starting from Type fields incl. IVHD device entries. */
-    uint16_t        u16DeviceId;            /**< Device ID of the IOMMU. */
-    uint16_t        u16CapOffset;           /**< Offset in Capability space for control fields of IOMMU. */
-    uint64_t        u64BaseAddress;         /**< Base address of IOMMU control registers in MMIO space. */
-    uint16_t        u16PciSegmentGroup;     /**< PCI segment group number. */
-    uint16_t        u16IommuInfo;           /**< Interrupt number and unit ID. */
-    uint32_t        u32IommuAttr;           /**< IOMMU info. not reported in EFR. */
-    uint64_t        u64EfrRegister;         /**< Extended Feature Register (must be identical to its MMIO shadow). */
-    uint64_t        u64Rsvd0;               /**< Reserved for future. */
-    /* IVHD device entry block follows. */
-} ACPIIVHDTYPE11;
-AssertCompileSize(ACPIIVHDTYPE11, 40);
-
-/** AMD IOMMU: IVHD (I/O Virtualization Hardware Definition) Type 40h.
- *  In accordance with the AMD spec. */
-typedef struct ACPIIVHDTYPE11 ACPIIVHDTYPE40;
-
 /** AMD IOMMU: IVRS (I/O Virtualization Reporting Structure).
  *  In accordance with the AMD spec. */
@@ -3641,5 +3197,5 @@
     Ivrs.IvhdType10.u16DeviceId        = PCIBDF_MAKE(uIommuBus, VBOX_PCI_DEVFN_MAKE(uIommuDev, uIommuFn));
     Ivrs.IvhdType10.u16CapOffset       = 0;             /* 0=No multiple IOMMU functionality. */
-    Ivrs.IvhdType10.u64BaseAddress     = 0xfeb80000;    /* MMIO base address: Taken from real hardware ACPI dumps. */
+    Ivrs.IvhdType10.u64BaseAddress     = IOMMU_MMIO_BASE_ADDR;
     Ivrs.IvhdType10.u16PciSegmentGroup = 0;
     /* NOTE! Subfields in the following fields must match any corresponding field in PCI/MMIO registers of the IOMMU device. */
@@ -3660,5 +3216,5 @@
                                        | RT_BF_MAKE(ACPI_IOMMU_FEAT_BF_MSI_NUM_PPR, 0)
                                        | RT_BF_MAKE(ACPI_IOMMU_FEAT_BF_GATS,        0)
-                                       | RT_BF_MAKE(ACPI_IOMMU_FEAT_BF_HATS,        6 & 3); /* IOMMU_MAX_HOST_PT_LEVEL & 3*/
+                                       | RT_BF_MAKE(ACPI_IOMMU_FEAT_BF_HATS,        IOMMU_MAX_HOST_PT_LEVEL & 3);
     /* Start range from BDF (00:01:00). */
     Ivrs.IvhdType10Start.u8DevEntryType = ACPI_IVHD_DEVENTRY_TYPE_START_RANGE;
@@ -3718,5 +3274,5 @@
                                        | RT_BF_MAKE(IOMMU_EXT_FEAT_BF_HE_SUP,             1)
                                        | RT_BF_MAKE(IOMMU_EXT_FEAT_BF_PC_SUP,             0)
-                                       | RT_BF_MAKE(IOMMU_EXT_FEAT_BF_HATS,               6 /* IOMMU_MAX_HOST_PT_LEVEL */ & 3)
+                                       | RT_BF_MAKE(IOMMU_EXT_FEAT_BF_HATS,               IOMMU_MAX_HOST_PT_LEVEL & 3)
                                        | RT_BF_MAKE(IOMMU_EXT_FEAT_BF_GATS,               0)
                                        | RT_BF_MAKE(IOMMU_EXT_FEAT_BF_GLX_SUP,            0)
@@ -3728,5 +3284,5 @@
                                        | RT_BF_MAKE(IOMMU_EXT_FEAT_BF_PASID_MAX,          0)
                                        | RT_BF_MAKE(IOMMU_EXT_FEAT_BF_US_SUP,             0)
-                                       | RT_BF_MAKE(IOMMU_EXT_FEAT_BF_DEV_TBL_SEG_SUP,    3 /* IOMMU_MAX_DEV_TAB_SEGMENTS */)
+                                       | RT_BF_MAKE(IOMMU_EXT_FEAT_BF_DEV_TBL_SEG_SUP,    IOMMU_MAX_DEV_TAB_SEGMENTS)
                                        | RT_BF_MAKE(IOMMU_EXT_FEAT_BF_PPR_OVERFLOW_EARLY, 0)
                                        | RT_BF_MAKE(IOMMU_EXT_FEAT_BF_PPR_AUTO_RES_SUP,   0)
