Adding upstream version 6.1.22-dfsg.upstream/6.1.22-dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 4717 insertions, 0 deletions

diff --git a/src/VBox/VMM/VMMR3/PDMDevHlp.cpp b/src/VBox/VMM/VMMR3/PDMDevHlp.cpp
new file mode 100644
index 00000000..02a2d6d9
--- /dev/null
+++ b/src/VBox/VMM/VMMR3/PDMDevHlp.cpp
@@ -0,0 +1,4717 @@
+/* $Id: PDMDevHlp.cpp $ */
+/** @file
+ * PDM - Pluggable Device and Driver Manager, Device Helpers.
+ */
+
+/*
+ * Copyright (C) 2006-2020 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.
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#define LOG_GROUP LOG_GROUP_PDM_DEVICE
+#define PDMPCIDEV_INCLUDE_PRIVATE  /* Hack to get pdmpcidevint.h included at the right point. */
+#include "PDMInternal.h"
+#include <VBox/vmm/pdm.h>
+#include <VBox/vmm/mm.h>
+#include <VBox/vmm/hm.h>
+#include <VBox/vmm/pgm.h>
+#include <VBox/vmm/iom.h>
+#include <VBox/vmm/dbgf.h>
+#include <VBox/vmm/ssm.h>
+#include <VBox/vmm/vmapi.h>
+#include <VBox/vmm/vmm.h>
+#include <VBox/vmm/vmcc.h>
+
+#include <VBox/version.h>
+#include <VBox/log.h>
+#include <VBox/err.h>
+#include <iprt/asm.h>
+#include <iprt/assert.h>
+#include <iprt/ctype.h>
+#include <iprt/string.h>
+#include <iprt/thread.h>
+
+#include "dtrace/VBoxVMM.h"
+#include "PDMInline.h"
+
+
+/*********************************************************************************************************************************
+*   Defined Constants And Macros                                                                                                 *
+*********************************************************************************************************************************/
+/** @def PDM_DEVHLP_DEADLOCK_DETECTION
+ * Define this to enable the deadlock detection when accessing physical memory.
+ */
+#if /*defined(DEBUG_bird) ||*/ defined(DOXYGEN_RUNNING)
+# define PDM_DEVHLP_DEADLOCK_DETECTION /**< @todo enable DevHlp deadlock detection! */
+#endif
+
+
+
+/** @name R3 DevHlp
+ * @{
+ */
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnIoPortCreateEx} */
+static DECLCALLBACK(int) pdmR3DevHlp_IoPortCreateEx(PPDMDEVINS pDevIns, RTIOPORT cPorts, uint32_t fFlags, PPDMPCIDEV pPciDev,
+                                                    uint32_t iPciRegion, PFNIOMIOPORTNEWOUT pfnOut, PFNIOMIOPORTNEWIN pfnIn,
+                                                    PFNIOMIOPORTNEWOUTSTRING pfnOutStr, PFNIOMIOPORTNEWINSTRING pfnInStr, RTR3PTR pvUser,
+                                                    const char *pszDesc, PCIOMIOPORTDESC paExtDescs, PIOMIOPORTHANDLE phIoPorts)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    LogFlow(("pdmR3DevHlp_IoPortCreateEx: caller='%s'/%d: cPorts=%#x fFlags=%#x pPciDev=%p iPciRegion=%#x pfnOut=%p pfnIn=%p pfnOutStr=%p pfnInStr=%p pvUser=%p pszDesc=%p:{%s} paExtDescs=%p phIoPorts=%p\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, cPorts, fFlags, pPciDev, iPciRegion, pfnOut, pfnIn, pfnOutStr, pfnInStr,
+             pvUser, pszDesc, pszDesc, paExtDescs, phIoPorts));
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    VM_ASSERT_EMT0_RETURN(pVM, VERR_VM_THREAD_NOT_EMT);
+    VM_ASSERT_STATE_RETURN(pVM, VMSTATE_CREATING, VERR_VM_INVALID_VM_STATE);
+
+    int rc = IOMR3IoPortCreate(pVM, pDevIns, cPorts, fFlags, pPciDev, iPciRegion,
+                               pfnOut, pfnIn, pfnOutStr, pfnInStr, pvUser, pszDesc, paExtDescs, phIoPorts);
+
+    LogFlow(("pdmR3DevHlp_IoPortCreateEx: caller='%s'/%d: returns %Rrc (*phIoPorts=%#x)\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, rc, *phIoPorts));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnIoPortMap} */
+static DECLCALLBACK(int) pdmR3DevHlp_IoPortMap(PPDMDEVINS pDevIns, IOMIOPORTHANDLE hIoPorts, RTIOPORT Port)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    LogFlow(("pdmR3DevHlp_IoPortMap: caller='%s'/%d: hIoPorts=%#x Port=%#x\n", pDevIns->pReg->szName, pDevIns->iInstance, hIoPorts, Port));
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    VM_ASSERT_EMT_RETURN(pVM, VERR_VM_THREAD_NOT_EMT);
+
+    int rc = IOMR3IoPortMap(pVM, pDevIns, hIoPorts, Port);
+
+    LogFlow(("pdmR3DevHlp_IoPortMap: caller='%s'/%d: returns %Rrc\n", pDevIns->pReg->szName, pDevIns->iInstance, rc));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnIoPortUnmap} */
+static DECLCALLBACK(int) pdmR3DevHlp_IoPortUnmap(PPDMDEVINS pDevIns, IOMIOPORTHANDLE hIoPorts)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    LogFlow(("pdmR3DevHlp_IoPortMap: caller='%s'/%d: hIoPorts=%#x\n", pDevIns->pReg->szName, pDevIns->iInstance, hIoPorts));
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    VM_ASSERT_EMT_RETURN(pVM, VERR_VM_THREAD_NOT_EMT);
+
+    int rc = IOMR3IoPortUnmap(pVM, pDevIns, hIoPorts);
+
+    LogFlow(("pdmR3DevHlp_IoPortMap: caller='%s'/%d: returns %Rrc\n", pDevIns->pReg->szName, pDevIns->iInstance, rc));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnIoPortGetMappingAddress} */
+static DECLCALLBACK(uint32_t) pdmR3DevHlp_IoPortGetMappingAddress(PPDMDEVINS pDevIns, IOMIOPORTHANDLE hIoPorts)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    LogFlow(("pdmR3DevHlp_IoPortGetMappingAddress: caller='%s'/%d: hIoPorts=%#x\n", pDevIns->pReg->szName, pDevIns->iInstance, hIoPorts));
+
+    uint32_t uAddress = IOMR3IoPortGetMappingAddress(pDevIns->Internal.s.pVMR3, pDevIns, hIoPorts);
+
+    LogFlow(("pdmR3DevHlp_IoPortGetMappingAddress: caller='%s'/%d: returns %#RX32\n", pDevIns->pReg->szName, pDevIns->iInstance, uAddress));
+    return uAddress;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnMmioCreateEx} */
+static DECLCALLBACK(int) pdmR3DevHlp_MmioCreateEx(PPDMDEVINS pDevIns, RTGCPHYS cbRegion,
+                                                  uint32_t fFlags, PPDMPCIDEV pPciDev, uint32_t iPciRegion,
+                                                  PFNIOMMMIONEWWRITE pfnWrite, PFNIOMMMIONEWREAD pfnRead, PFNIOMMMIONEWFILL pfnFill,
+                                                  void *pvUser, const char *pszDesc, PIOMMMIOHANDLE phRegion)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    LogFlow(("pdmR3DevHlp_MmioCreateEx: caller='%s'/%d: cbRegion=%#RGp fFlags=%#x pPciDev=%p iPciRegion=%#x pfnWrite=%p pfnRead=%p pfnFill=%p pvUser=%p pszDesc=%p:{%s} phRegion=%p\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, cbRegion, fFlags, pPciDev, iPciRegion, pfnWrite, pfnRead, pfnFill, pvUser, pszDesc, pszDesc, phRegion));
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    VM_ASSERT_EMT0_RETURN(pVM, VERR_VM_THREAD_NOT_EMT);
+    VM_ASSERT_STATE_RETURN(pVM, VMSTATE_CREATING, VERR_VM_INVALID_VM_STATE);
+
+    if (pDevIns->iInstance > 0)
+    {
+        pszDesc = MMR3HeapAPrintf(pVM, MM_TAG_PDM_DEVICE_DESC, "%s [%u]", pszDesc, pDevIns->iInstance);
+        AssertReturn(pszDesc, VERR_NO_STR_MEMORY);
+    }
+
+    /* HACK ALERT! Round the size up to page size.  The PCI bus should do something similar before mapping it. */
+    /** @todo It's possible we need to do dummy MMIO fill-in of the PCI bus or
+     *        guest adds more alignment to an region. */
+    cbRegion = RT_ALIGN_T(cbRegion, PAGE_SIZE, RTGCPHYS);
+
+    int rc = IOMR3MmioCreate(pVM, pDevIns, cbRegion, fFlags, pPciDev, iPciRegion,
+                             pfnWrite, pfnRead, pfnFill, pvUser, pszDesc, phRegion);
+
+    LogFlow(("pdmR3DevHlp_MmioCreateEx: caller='%s'/%d: returns %Rrc (*phRegion=%#x)\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, rc, *phRegion));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnMmioMap} */
+static DECLCALLBACK(int) pdmR3DevHlp_MmioMap(PPDMDEVINS pDevIns, IOMMMIOHANDLE hRegion, RTGCPHYS GCPhys)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    LogFlow(("pdmR3DevHlp_MmioMap: caller='%s'/%d: hRegion=%#x GCPhys=%#RGp\n", pDevIns->pReg->szName, pDevIns->iInstance, hRegion, GCPhys));
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    VM_ASSERT_EMT_RETURN(pVM, VERR_VM_THREAD_NOT_EMT);
+
+    int rc = IOMR3MmioMap(pVM, pDevIns, hRegion, GCPhys);
+
+    LogFlow(("pdmR3DevHlp_MmioMap: caller='%s'/%d: returns %Rrc\n", pDevIns->pReg->szName, pDevIns->iInstance, rc));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnMmioUnmap} */
+static DECLCALLBACK(int) pdmR3DevHlp_MmioUnmap(PPDMDEVINS pDevIns, IOMMMIOHANDLE hRegion)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    LogFlow(("pdmR3DevHlp_MmioUnmap: caller='%s'/%d: hRegion=%#x\n", pDevIns->pReg->szName, pDevIns->iInstance, hRegion));
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    VM_ASSERT_EMT_RETURN(pVM, VERR_VM_THREAD_NOT_EMT);
+
+    int rc = IOMR3MmioUnmap(pVM, pDevIns, hRegion);
+
+    LogFlow(("pdmR3DevHlp_MmioUnmap: caller='%s'/%d: returns %Rrc\n", pDevIns->pReg->szName, pDevIns->iInstance, rc));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnMmioReduce} */
+static DECLCALLBACK(int) pdmR3DevHlp_MmioReduce(PPDMDEVINS pDevIns, IOMMMIOHANDLE hRegion, RTGCPHYS cbRegion)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    LogFlow(("pdmR3DevHlp_MmioReduce: caller='%s'/%d: hRegion=%#x cbRegion=%#RGp\n", pDevIns->pReg->szName, pDevIns->iInstance, hRegion, cbRegion));
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    VM_ASSERT_EMT_RETURN(pVM, VERR_VM_THREAD_NOT_EMT);
+    VM_ASSERT_STATE_RETURN(pVM, VMSTATE_LOADING, VERR_VM_INVALID_VM_STATE);
+
+    int rc = IOMR3MmioReduce(pVM, pDevIns, hRegion, cbRegion);
+
+    LogFlow(("pdmR3DevHlp_MmioReduce: caller='%s'/%d: returns %Rrc\n", pDevIns->pReg->szName, pDevIns->iInstance, rc));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnMmioGetMappingAddress} */
+static DECLCALLBACK(RTGCPHYS) pdmR3DevHlp_MmioGetMappingAddress(PPDMDEVINS pDevIns, IOMMMIOHANDLE hRegion)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    LogFlow(("pdmR3DevHlp_MmioGetMappingAddress: caller='%s'/%d: hRegion=%#x\n", pDevIns->pReg->szName, pDevIns->iInstance, hRegion));
+
+    RTGCPHYS GCPhys = IOMR3MmioGetMappingAddress(pDevIns->Internal.s.pVMR3, pDevIns, hRegion);
+
+    LogFlow(("pdmR3DevHlp_MmioGetMappingAddress: caller='%s'/%d: returns %RGp\n", pDevIns->pReg->szName, pDevIns->iInstance, GCPhys));
+    return GCPhys;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnMmio2Create} */
+static DECLCALLBACK(int) pdmR3DevHlp_Mmio2Create(PPDMDEVINS pDevIns, PPDMPCIDEV pPciDev, uint32_t iPciRegion, RTGCPHYS cbRegion,
+                                                 uint32_t fFlags, const char *pszDesc, void **ppvMapping, PPGMMMIO2HANDLE phRegion)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    VM_ASSERT_EMT(pDevIns->Internal.s.pVMR3);
+    LogFlow(("pdmR3DevHlp_Mmio2Create: caller='%s'/%d: pPciDev=%p (%#x) iPciRegion=%#x cbRegion=%#RGp fFlags=%RX32 pszDesc=%p:{%s} ppvMapping=%p phRegion=%p\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, pPciDev, pPciDev ? pPciDev->uDevFn : UINT32_MAX, iPciRegion, cbRegion,
+             fFlags, pszDesc, pszDesc, ppvMapping, phRegion));
+    *ppvMapping = NULL;
+    *phRegion   = NIL_PGMMMIO2HANDLE;
+    AssertReturn(!pPciDev || pPciDev->Int.s.pDevInsR3 == pDevIns, VERR_INVALID_PARAMETER);
+
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    VM_ASSERT_EMT0_RETURN(pVM, VERR_VM_THREAD_NOT_EMT);
+    AssertMsgReturn(   pVM->enmVMState == VMSTATE_CREATING
+                    || pVM->enmVMState == VMSTATE_LOADING,
+                    ("state %s, expected CREATING or LOADING\n", VMGetStateName(pVM->enmVMState)), VERR_VM_INVALID_VM_STATE);
+
+    AssertReturn(!(iPciRegion & UINT16_MAX), VERR_INVALID_PARAMETER); /* not implemented. */
+
+    /** @todo PGMR3PhysMmio2Register mangles the description, move it here and
+     *        use a real string cache. */
+    int rc = PGMR3PhysMmio2Register(pVM, pDevIns, pPciDev ? pPciDev->Int.s.idxDevCfg : 254, iPciRegion >> 16,
+                                    cbRegion, fFlags, pszDesc, ppvMapping, phRegion);
+
+    LogFlow(("pdmR3DevHlp_Mmio2Create: caller='%s'/%d: returns %Rrc *ppvMapping=%p phRegion=%#RX64\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, rc, *ppvMapping, *phRegion));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnMmio2Destroy} */
+static DECLCALLBACK(int) pdmR3DevHlp_Mmio2Destroy(PPDMDEVINS pDevIns, PGMMMIO2HANDLE hRegion)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    VM_ASSERT_EMT(pDevIns->Internal.s.pVMR3);
+    LogFlow(("pdmR3DevHlp_Mmio2Destroy: caller='%s'/%d: hRegion=%#RX64\n", pDevIns->pReg->szName, pDevIns->iInstance, hRegion));
+
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    VM_ASSERT_EMT_RETURN(pVM, VERR_VM_THREAD_NOT_EMT);
+    AssertMsgReturn(   pVM->enmVMState == VMSTATE_DESTROYING
+                    || pVM->enmVMState == VMSTATE_LOADING,
+                    ("state %s, expected DESTROYING or LOADING\n", VMGetStateName(pVM->enmVMState)), VERR_VM_INVALID_VM_STATE);
+
+    int rc = PGMR3PhysMmio2Deregister(pDevIns->Internal.s.pVMR3, pDevIns, hRegion);
+
+    LogFlow(("pdmR3DevHlp_Mmio2Destroy: caller='%s'/%d: returns %Rrc\n", pDevIns->pReg->szName, pDevIns->iInstance, rc));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnMmio2Map} */
+static DECLCALLBACK(int) pdmR3DevHlp_Mmio2Map(PPDMDEVINS pDevIns, PGMMMIO2HANDLE hRegion, RTGCPHYS GCPhys)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    LogFlow(("pdmR3DevHlp_Mmio2Map: caller='%s'/%d: hRegion=%#RX64 GCPhys=%RGp\n", pDevIns->pReg->szName, pDevIns->iInstance, hRegion, GCPhys));
+
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    VM_ASSERT_EMT_RETURN(pVM, VERR_VM_THREAD_NOT_EMT);
+
+    int rc = PGMR3PhysMmio2Map(pDevIns->Internal.s.pVMR3, pDevIns, hRegion, GCPhys);
+
+    LogFlow(("pdmR3DevHlp_Mmio2Map: caller='%s'/%d: returns %Rrc\n", pDevIns->pReg->szName, pDevIns->iInstance, rc));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnMmio2Unmap} */
+static DECLCALLBACK(int) pdmR3DevHlp_Mmio2Unmap(PPDMDEVINS pDevIns, PGMMMIO2HANDLE hRegion)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    LogFlow(("pdmR3DevHlp_Mmio2Unmap: caller='%s'/%d: hRegion=%#RX64\n", pDevIns->pReg->szName, pDevIns->iInstance, hRegion));
+
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    VM_ASSERT_EMT_RETURN(pVM, VERR_VM_THREAD_NOT_EMT);
+
+    int rc = PGMR3PhysMmio2Unmap(pDevIns->Internal.s.pVMR3, pDevIns, hRegion, NIL_RTGCPHYS);
+
+    LogFlow(("pdmR3DevHlp_Mmio2Unmap: caller='%s'/%d: returns %Rrc\n", pDevIns->pReg->szName, pDevIns->iInstance, rc));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnMmio2Reduce} */
+static DECLCALLBACK(int) pdmR3DevHlp_Mmio2Reduce(PPDMDEVINS pDevIns, PGMMMIO2HANDLE hRegion, RTGCPHYS cbRegion)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    LogFlow(("pdmR3DevHlp_Mmio2Reduce: caller='%s'/%d: hRegion=%#RX64 cbRegion=%RGp\n", pDevIns->pReg->szName, pDevIns->iInstance, hRegion, cbRegion));
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    VM_ASSERT_EMT_RETURN(pVM, VERR_VM_THREAD_NOT_EMT);
+    VM_ASSERT_STATE_RETURN(pVM, VMSTATE_LOADING, VERR_VM_INVALID_VM_STATE);
+
+    int rc = PGMR3PhysMmio2Reduce(pDevIns->Internal.s.pVMR3, pDevIns, hRegion, cbRegion);
+
+    LogFlow(("pdmR3DevHlp_Mmio2Reduce: caller='%s'/%d: returns %Rrc\n", pDevIns->pReg->szName, pDevIns->iInstance, rc));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnMmio2GetMappingAddress} */
+static DECLCALLBACK(RTGCPHYS) pdmR3DevHlp_Mmio2GetMappingAddress(PPDMDEVINS pDevIns, PGMMMIO2HANDLE hRegion)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    LogFlow(("pdmR3DevHlp_Mmio2GetMappingAddress: caller='%s'/%d: hRegion=%#RX6r\n", pDevIns->pReg->szName, pDevIns->iInstance, hRegion));
+    VM_ASSERT_EMT0_RETURN(pVM, NIL_RTGCPHYS);
+
+    RTGCPHYS GCPhys = PGMR3PhysMmio2GetMappingAddress(pVM, pDevIns, hRegion);
+
+    LogFlow(("pdmR3DevHlp_Mmio2GetMappingAddress: caller='%s'/%d: returns %RGp\n", pDevIns->pReg->szName, pDevIns->iInstance, GCPhys));
+    return GCPhys;
+}
+
+/**
+ * @copydoc PDMDEVHLPR3::pfnMmio2ChangeRegionNo
+ */
+static DECLCALLBACK(int) pdmR3DevHlp_Mmio2ChangeRegionNo(PPDMDEVINS pDevIns, PGMMMIO2HANDLE hRegion, uint32_t iNewRegion)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    LogFlow(("pdmR3DevHlp_Mmio2ChangeRegionNo: caller='%s'/%d: hRegion=%#RX6r iNewRegion=%#x\n", pDevIns->pReg->szName, pDevIns->iInstance, hRegion, iNewRegion));
+    VM_ASSERT_EMT0_RETURN(pVM, VERR_VM_THREAD_NOT_EMT);
+
+    int rc = PGMR3PhysMmio2ChangeRegionNo(pVM, pDevIns, hRegion, iNewRegion);
+
+    LogFlow(("pdmR3DevHlp_Mmio2ChangeRegionNo: caller='%s'/%d: returns %Rrc\n", pDevIns->pReg->szName, pDevIns->iInstance, rc));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnROMRegister} */
+static DECLCALLBACK(int) pdmR3DevHlp_ROMRegister(PPDMDEVINS pDevIns, RTGCPHYS GCPhysStart, uint32_t cbRange,
+                                                 const void *pvBinary, uint32_t cbBinary, uint32_t fFlags, const char *pszDesc)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    VM_ASSERT_EMT(pDevIns->Internal.s.pVMR3);
+    LogFlow(("pdmR3DevHlp_ROMRegister: caller='%s'/%d: GCPhysStart=%RGp cbRange=%#x pvBinary=%p cbBinary=%#x fFlags=%#RX32 pszDesc=%p:{%s}\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, GCPhysStart, cbRange, pvBinary, cbBinary, fFlags, pszDesc, pszDesc));
+
+/** @todo can we mangle pszDesc? */
+    int rc = PGMR3PhysRomRegister(pDevIns->Internal.s.pVMR3, pDevIns, GCPhysStart, cbRange, pvBinary, cbBinary, fFlags, pszDesc);
+
+    LogFlow(("pdmR3DevHlp_ROMRegister: caller='%s'/%d: returns %Rrc\n", pDevIns->pReg->szName, pDevIns->iInstance, rc));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnROMProtectShadow} */
+static DECLCALLBACK(int) pdmR3DevHlp_ROMProtectShadow(PPDMDEVINS pDevIns, RTGCPHYS GCPhysStart, uint32_t cbRange, PGMROMPROT enmProt)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    LogFlow(("pdmR3DevHlp_ROMProtectShadow: caller='%s'/%d: GCPhysStart=%RGp cbRange=%#x enmProt=%d\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, GCPhysStart, cbRange, enmProt));
+
+    int rc = PGMR3PhysRomProtect(pDevIns->Internal.s.pVMR3, GCPhysStart, cbRange, enmProt);
+
+    LogFlow(("pdmR3DevHlp_ROMProtectShadow: caller='%s'/%d: returns %Rrc\n", pDevIns->pReg->szName, pDevIns->iInstance, rc));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnSSMRegister} */
+static DECLCALLBACK(int) pdmR3DevHlp_SSMRegister(PPDMDEVINS pDevIns, uint32_t uVersion, size_t cbGuess, const char *pszBefore,
+                                                 PFNSSMDEVLIVEPREP pfnLivePrep, PFNSSMDEVLIVEEXEC pfnLiveExec, PFNSSMDEVLIVEVOTE pfnLiveVote,
+                                                 PFNSSMDEVSAVEPREP pfnSavePrep, PFNSSMDEVSAVEEXEC pfnSaveExec, PFNSSMDEVSAVEDONE pfnSaveDone,
+                                                 PFNSSMDEVLOADPREP pfnLoadPrep, PFNSSMDEVLOADEXEC pfnLoadExec, PFNSSMDEVLOADDONE pfnLoadDone)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    VM_ASSERT_EMT(pDevIns->Internal.s.pVMR3);
+    LogFlow(("pdmR3DevHlp_SSMRegister: caller='%s'/%d: uVersion=%#x cbGuess=%#x pszBefore=%p:{%s}\n"
+             "    pfnLivePrep=%p pfnLiveExec=%p pfnLiveVote=%p pfnSavePrep=%p pfnSaveExec=%p pfnSaveDone=%p pszLoadPrep=%p pfnLoadExec=%p pfnLoadDone=%p\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, uVersion, cbGuess, pszBefore, pszBefore,
+             pfnLivePrep, pfnLiveExec, pfnLiveVote,
+             pfnSavePrep, pfnSaveExec, pfnSaveDone,
+             pfnLoadPrep, pfnLoadExec, pfnLoadDone));
+
+    int rc = SSMR3RegisterDevice(pDevIns->Internal.s.pVMR3, pDevIns, pDevIns->pReg->szName, pDevIns->iInstance,
+                                 uVersion, cbGuess, pszBefore,
+                                 pfnLivePrep, pfnLiveExec, pfnLiveVote,
+                                 pfnSavePrep, pfnSaveExec, pfnSaveDone,
+                                 pfnLoadPrep, pfnLoadExec, pfnLoadDone);
+
+    LogFlow(("pdmR3DevHlp_SSMRegister: caller='%s'/%d: returns %Rrc\n", pDevIns->pReg->szName, pDevIns->iInstance, rc));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnTMTimerCreate} */
+static DECLCALLBACK(int) pdmR3DevHlp_TMTimerCreate(PPDMDEVINS pDevIns, TMCLOCK enmClock, PFNTMTIMERDEV pfnCallback, void *pvUser, uint32_t fFlags, const char *pszDesc, PPTMTIMERR3 ppTimer)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    VM_ASSERT_EMT(pVM);
+    LogFlow(("pdmR3DevHlp_TMTimerCreate: caller='%s'/%d: enmClock=%d pfnCallback=%p pvUser=%p fFlags=%#x pszDesc=%p:{%s} ppTimer=%p\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, enmClock, pfnCallback, pvUser, fFlags, pszDesc, pszDesc, ppTimer));
+
+    if (pDevIns->iInstance > 0) /** @todo use a string cache here later. */
+    {
+         char *pszDesc2 = MMR3HeapAPrintf(pVM, MM_TAG_PDM_DEVICE_DESC, "%s[%u]", pszDesc, pDevIns->iInstance);
+         if (pszDesc2)
+             pszDesc = pszDesc2;
+    }
+
+    int rc = TMR3TimerCreateDevice(pVM, pDevIns, enmClock, pfnCallback, pvUser, fFlags, pszDesc, ppTimer);
+
+    LogFlow(("pdmR3DevHlp_TMTimerCreate: caller='%s'/%d: returns %Rrc\n", pDevIns->pReg->szName, pDevIns->iInstance, rc));
+    return rc;
+}
+
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnTimerCreate} */
+static DECLCALLBACK(int) pdmR3DevHlp_TimerCreate(PPDMDEVINS pDevIns, TMCLOCK enmClock, PFNTMTIMERDEV pfnCallback,
+                                                 void *pvUser, uint32_t fFlags, const char *pszDesc, PTMTIMERHANDLE phTimer)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    VM_ASSERT_EMT(pVM);
+    LogFlow(("pdmR3DevHlp_TimerCreate: caller='%s'/%d: enmClock=%d pfnCallback=%p pvUser=%p fFlags=%#x pszDesc=%p:{%s} phTimer=%p\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, enmClock, pfnCallback, pvUser, fFlags, pszDesc, pszDesc, phTimer));
+
+    if (pDevIns->iInstance > 0) /** @todo use a string cache here later. */
+    {
+         char *pszDesc2 = MMR3HeapAPrintf(pVM, MM_TAG_PDM_DEVICE_DESC, "%s[%u]", pszDesc, pDevIns->iInstance);
+         if (pszDesc2)
+             pszDesc = pszDesc2;
+    }
+
+    PTMTIMER pTimer = NULL;
+    int rc = TMR3TimerCreateDevice(pVM, pDevIns, enmClock, pfnCallback, pvUser, fFlags, pszDesc, &pTimer);
+    *phTimer = (uintptr_t)pTimer;
+
+    LogFlow(("pdmR3DevHlp_TimerCreate: caller='%s'/%d: returns %Rrc\n", pDevIns->pReg->szName, pDevIns->iInstance, rc));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnTimerToPtr} */
+static DECLCALLBACK(PTMTIMERR3) pdmR3DevHlp_TimerToPtr(PPDMDEVINS pDevIns, TMTIMERHANDLE hTimer)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    RT_NOREF(pDevIns);
+    return (PTMTIMERR3)hTimer;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnTimerFromMicro} */
+static DECLCALLBACK(uint64_t) pdmR3DevHlp_TimerFromMicro(PPDMDEVINS pDevIns, TMTIMERHANDLE hTimer, uint64_t cMicroSecs)
+{
+    return TMTimerFromMicro(pdmR3DevHlp_TimerToPtr(pDevIns, hTimer), cMicroSecs);
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnTimerFromMilli} */
+static DECLCALLBACK(uint64_t) pdmR3DevHlp_TimerFromMilli(PPDMDEVINS pDevIns, TMTIMERHANDLE hTimer, uint64_t cMilliSecs)
+{
+    return TMTimerFromMilli(pdmR3DevHlp_TimerToPtr(pDevIns, hTimer), cMilliSecs);
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnTimerFromNano} */
+static DECLCALLBACK(uint64_t) pdmR3DevHlp_TimerFromNano(PPDMDEVINS pDevIns, TMTIMERHANDLE hTimer, uint64_t cNanoSecs)
+{
+    return TMTimerFromNano(pdmR3DevHlp_TimerToPtr(pDevIns, hTimer), cNanoSecs);
+}
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnTimerGet} */
+static DECLCALLBACK(uint64_t) pdmR3DevHlp_TimerGet(PPDMDEVINS pDevIns, TMTIMERHANDLE hTimer)
+{
+    return TMTimerGet(pdmR3DevHlp_TimerToPtr(pDevIns, hTimer));
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnTimerGetFreq} */
+static DECLCALLBACK(uint64_t) pdmR3DevHlp_TimerGetFreq(PPDMDEVINS pDevIns, TMTIMERHANDLE hTimer)
+{
+    return TMTimerGetFreq(pdmR3DevHlp_TimerToPtr(pDevIns, hTimer));
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnTimerGetNano} */
+static DECLCALLBACK(uint64_t) pdmR3DevHlp_TimerGetNano(PPDMDEVINS pDevIns, TMTIMERHANDLE hTimer)
+{
+    return TMTimerGetNano(pdmR3DevHlp_TimerToPtr(pDevIns, hTimer));
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnTimerIsActive} */
+static DECLCALLBACK(bool) pdmR3DevHlp_TimerIsActive(PPDMDEVINS pDevIns, TMTIMERHANDLE hTimer)
+{
+    return TMTimerIsActive(pdmR3DevHlp_TimerToPtr(pDevIns, hTimer));
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnTimerIsLockOwner} */
+static DECLCALLBACK(bool) pdmR3DevHlp_TimerIsLockOwner(PPDMDEVINS pDevIns, TMTIMERHANDLE hTimer)
+{
+    return TMTimerIsLockOwner(pdmR3DevHlp_TimerToPtr(pDevIns, hTimer));
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnTimerLockClock} */
+static DECLCALLBACK(VBOXSTRICTRC) pdmR3DevHlp_TimerLockClock(PPDMDEVINS pDevIns, TMTIMERHANDLE hTimer, int rcBusy)
+{
+    return TMTimerLock(pdmR3DevHlp_TimerToPtr(pDevIns, hTimer), rcBusy);
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnTimerLockClock2} */
+static DECLCALLBACK(VBOXSTRICTRC) pdmR3DevHlp_TimerLockClock2(PPDMDEVINS pDevIns, TMTIMERHANDLE hTimer,
+                                                              PPDMCRITSECT pCritSect, int rcBusy)
+{
+    VBOXSTRICTRC rc = TMTimerLock(pdmR3DevHlp_TimerToPtr(pDevIns, hTimer), rcBusy);
+    if (rc == VINF_SUCCESS)
+    {
+        rc = PDMCritSectEnter(pCritSect, rcBusy);
+        if (rc == VINF_SUCCESS)
+            return rc;
+        AssertRC(VBOXSTRICTRC_VAL(rc));
+        TMTimerUnlock(pdmR3DevHlp_TimerToPtr(pDevIns, hTimer));
+    }
+    else
+        AssertRC(VBOXSTRICTRC_VAL(rc));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnTimerSet} */
+static DECLCALLBACK(int) pdmR3DevHlp_TimerSet(PPDMDEVINS pDevIns, TMTIMERHANDLE hTimer, uint64_t uExpire)
+{
+    return TMTimerSet(pdmR3DevHlp_TimerToPtr(pDevIns, hTimer), uExpire);
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnTimerSetFrequencyHint} */
+static DECLCALLBACK(int) pdmR3DevHlp_TimerSetFrequencyHint(PPDMDEVINS pDevIns, TMTIMERHANDLE hTimer, uint32_t uHz)
+{
+    return TMTimerSetFrequencyHint(pdmR3DevHlp_TimerToPtr(pDevIns, hTimer), uHz);
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnTimerSetMicro} */
+static DECLCALLBACK(int) pdmR3DevHlp_TimerSetMicro(PPDMDEVINS pDevIns, TMTIMERHANDLE hTimer, uint64_t cMicrosToNext)
+{
+    return TMTimerSetMicro(pdmR3DevHlp_TimerToPtr(pDevIns, hTimer), cMicrosToNext);
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnTimerSetMillies} */
+static DECLCALLBACK(int) pdmR3DevHlp_TimerSetMillies(PPDMDEVINS pDevIns, TMTIMERHANDLE hTimer, uint64_t cMilliesToNext)
+{
+    return TMTimerSetMillies(pdmR3DevHlp_TimerToPtr(pDevIns, hTimer), cMilliesToNext);
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnTimerSetNano} */
+static DECLCALLBACK(int) pdmR3DevHlp_TimerSetNano(PPDMDEVINS pDevIns, TMTIMERHANDLE hTimer, uint64_t cNanosToNext)
+{
+    return TMTimerSetNano(pdmR3DevHlp_TimerToPtr(pDevIns, hTimer), cNanosToNext);
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnTimerSetRelative} */
+static DECLCALLBACK(int) pdmR3DevHlp_TimerSetRelative(PPDMDEVINS pDevIns, TMTIMERHANDLE hTimer, uint64_t cTicksToNext, uint64_t *pu64Now)
+{
+    return TMTimerSetRelative(pdmR3DevHlp_TimerToPtr(pDevIns, hTimer), cTicksToNext, pu64Now);
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnTimerStop} */
+static DECLCALLBACK(int) pdmR3DevHlp_TimerStop(PPDMDEVINS pDevIns, TMTIMERHANDLE hTimer)
+{
+    return TMTimerStop(pdmR3DevHlp_TimerToPtr(pDevIns, hTimer));
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnTimerUnlockClock} */
+static DECLCALLBACK(void) pdmR3DevHlp_TimerUnlockClock(PPDMDEVINS pDevIns, TMTIMERHANDLE hTimer)
+{
+    TMTimerUnlock(pdmR3DevHlp_TimerToPtr(pDevIns, hTimer));
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnTimerUnlockClock2} */
+static DECLCALLBACK(void) pdmR3DevHlp_TimerUnlockClock2(PPDMDEVINS pDevIns, TMTIMERHANDLE hTimer, PPDMCRITSECT pCritSect)
+{
+    TMTimerUnlock(pdmR3DevHlp_TimerToPtr(pDevIns, hTimer));
+    int rc = PDMCritSectLeave(pCritSect);
+    AssertRC(rc);
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnTimerSetCritSect} */
+static DECLCALLBACK(int) pdmR3DevHlp_TimerSetCritSect(PPDMDEVINS pDevIns, TMTIMERHANDLE hTimer, PPDMCRITSECT pCritSect)
+{
+    return TMR3TimerSetCritSect(pdmR3DevHlp_TimerToPtr(pDevIns, hTimer), pCritSect);
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnTimerSave} */
+static DECLCALLBACK(int) pdmR3DevHlp_TimerSave(PPDMDEVINS pDevIns, TMTIMERHANDLE hTimer, PSSMHANDLE pSSM)
+{
+    return TMR3TimerSave(pdmR3DevHlp_TimerToPtr(pDevIns, hTimer), pSSM);
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnTimerLoad} */
+static DECLCALLBACK(int) pdmR3DevHlp_TimerLoad(PPDMDEVINS pDevIns, TMTIMERHANDLE hTimer, PSSMHANDLE pSSM)
+{
+    return TMR3TimerLoad(pdmR3DevHlp_TimerToPtr(pDevIns, hTimer), pSSM);
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnTimerDestroy} */
+static DECLCALLBACK(int) pdmR3DevHlp_TimerDestroy(PPDMDEVINS pDevIns, TMTIMERHANDLE hTimer)
+{
+    return TMR3TimerDestroy(pdmR3DevHlp_TimerToPtr(pDevIns, hTimer));
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnTMUtcNow} */
+static DECLCALLBACK(PRTTIMESPEC) pdmR3DevHlp_TMUtcNow(PPDMDEVINS pDevIns, PRTTIMESPEC pTime)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    LogFlow(("pdmR3DevHlp_TMUtcNow: caller='%s'/%d: pTime=%p\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, pTime));
+
+    pTime = TMR3UtcNow(pDevIns->Internal.s.pVMR3, pTime);
+
+    LogFlow(("pdmR3DevHlp_TMUtcNow: caller='%s'/%d: returns %RU64\n", pDevIns->pReg->szName, pDevIns->iInstance, RTTimeSpecGetNano(pTime)));
+    return pTime;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnTMTimeVirtGet} */
+static DECLCALLBACK(uint64_t) pdmR3DevHlp_TMTimeVirtGet(PPDMDEVINS pDevIns)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    LogFlow(("pdmR3DevHlp_TMTimeVirtGet: caller='%s'/%d\n",
+             pDevIns->pReg->szName, pDevIns->iInstance));
+
+    uint64_t u64Time = TMVirtualSyncGet(pDevIns->Internal.s.pVMR3);
+
+    LogFlow(("pdmR3DevHlp_TMTimeVirtGet: caller='%s'/%d: returns %RU64\n", pDevIns->pReg->szName, pDevIns->iInstance, u64Time));
+    return u64Time;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnTMTimeVirtGetFreq} */
+static DECLCALLBACK(uint64_t) pdmR3DevHlp_TMTimeVirtGetFreq(PPDMDEVINS pDevIns)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    LogFlow(("pdmR3DevHlp_TMTimeVirtGetFreq: caller='%s'/%d\n",
+             pDevIns->pReg->szName, pDevIns->iInstance));
+
+    uint64_t u64Freq = TMVirtualGetFreq(pDevIns->Internal.s.pVMR3);
+
+    LogFlow(("pdmR3DevHlp_TMTimeVirtGetFreq: caller='%s'/%d: returns %RU64\n", pDevIns->pReg->szName, pDevIns->iInstance, u64Freq));
+    return u64Freq;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnTMTimeVirtGetNano} */
+static DECLCALLBACK(uint64_t) pdmR3DevHlp_TMTimeVirtGetNano(PPDMDEVINS pDevIns)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    LogFlow(("pdmR3DevHlp_TMTimeVirtGetNano: caller='%s'/%d\n",
+             pDevIns->pReg->szName, pDevIns->iInstance));
+
+    uint64_t u64Time = TMVirtualGet(pDevIns->Internal.s.pVMR3);
+    uint64_t u64Nano = TMVirtualToNano(pDevIns->Internal.s.pVMR3, u64Time);
+
+    LogFlow(("pdmR3DevHlp_TMTimeVirtGetNano: caller='%s'/%d: returns %RU64\n", pDevIns->pReg->szName, pDevIns->iInstance, u64Nano));
+    return u64Nano;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnGetSupDrvSession} */
+static DECLCALLBACK(PSUPDRVSESSION) pdmR3DevHlp_GetSupDrvSession(PPDMDEVINS pDevIns)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    LogFlow(("pdmR3DevHlp_GetSupDrvSession: caller='%s'/%d\n",
+             pDevIns->pReg->szName, pDevIns->iInstance));
+
+    PSUPDRVSESSION pSession = pDevIns->Internal.s.pVMR3->pSession;
+
+    LogFlow(("pdmR3DevHlp_GetSupDrvSession: caller='%s'/%d: returns %#p\n", pDevIns->pReg->szName, pDevIns->iInstance, pSession));
+    return pSession;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnQueryGenericUserObject} */
+static DECLCALLBACK(void *) pdmR3DevHlp_QueryGenericUserObject(PPDMDEVINS pDevIns, PCRTUUID pUuid)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    LogFlow(("pdmR3DevHlp_QueryGenericUserObject: caller='%s'/%d: pUuid=%p:%RTuuid\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, pUuid, pUuid));
+
+#if defined(DEBUG_bird) || defined(DEBUG_ramshankar) || defined(DEBUG_sunlover) || defined(DEBUG_michael) || defined(DEBUG_andy)
+    AssertMsgFailed(("'%s' wants %RTuuid - external only interface!\n", pDevIns->pReg->szName, pUuid));
+#endif
+
+    void *pvRet;
+    PUVM  pUVM = pDevIns->Internal.s.pVMR3->pUVM;
+    if (pUVM->pVmm2UserMethods->pfnQueryGenericObject)
+        pvRet = pUVM->pVmm2UserMethods->pfnQueryGenericObject(pUVM->pVmm2UserMethods, pUVM, pUuid);
+    else
+        pvRet = NULL;
+
+    LogRel(("pdmR3DevHlp_QueryGenericUserObject: caller='%s'/%d: returns %#p for %RTuuid\n",
+            pDevIns->pReg->szName, pDevIns->iInstance, pvRet, pUuid));
+    return pvRet;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnPhysRead} */
+static DECLCALLBACK(int) pdmR3DevHlp_PhysRead(PPDMDEVINS pDevIns, RTGCPHYS GCPhys, void *pvBuf, size_t cbRead)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    LogFlow(("pdmR3DevHlp_PhysRead: caller='%s'/%d: GCPhys=%RGp pvBuf=%p cbRead=%#x\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, GCPhys, pvBuf, cbRead));
+
+#if defined(VBOX_STRICT) && defined(PDM_DEVHLP_DEADLOCK_DETECTION)
+    if (!VM_IS_EMT(pVM))
+    {
+        char szNames[128];
+        uint32_t cLocks = PDMR3CritSectCountOwned(pVM, szNames, sizeof(szNames));
+        AssertMsg(cLocks == 0, ("cLocks=%u %s\n", cLocks, szNames));
+    }
+#endif
+
+    VBOXSTRICTRC rcStrict;
+    if (VM_IS_EMT(pVM))
+        rcStrict = PGMPhysRead(pVM, GCPhys, pvBuf, cbRead, PGMACCESSORIGIN_DEVICE);
+    else
+        rcStrict = PGMR3PhysReadExternal(pVM, GCPhys, pvBuf, cbRead, PGMACCESSORIGIN_DEVICE);
+    AssertMsg(rcStrict == VINF_SUCCESS, ("%Rrc\n", VBOXSTRICTRC_VAL(rcStrict))); /** @todo track down the users for this bugger. */
+
+    Log(("pdmR3DevHlp_PhysRead: caller='%s'/%d: returns %Rrc\n", pDevIns->pReg->szName, pDevIns->iInstance, VBOXSTRICTRC_VAL(rcStrict) ));
+    return VBOXSTRICTRC_VAL(rcStrict);
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnPhysWrite} */
+static DECLCALLBACK(int) pdmR3DevHlp_PhysWrite(PPDMDEVINS pDevIns, RTGCPHYS GCPhys, const void *pvBuf, size_t cbWrite)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    LogFlow(("pdmR3DevHlp_PhysWrite: caller='%s'/%d: GCPhys=%RGp pvBuf=%p cbWrite=%#x\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, GCPhys, pvBuf, cbWrite));
+
+#if defined(VBOX_STRICT) && defined(PDM_DEVHLP_DEADLOCK_DETECTION)
+    if (!VM_IS_EMT(pVM))
+    {
+        char szNames[128];
+        uint32_t cLocks = PDMR3CritSectCountOwned(pVM, szNames, sizeof(szNames));
+        AssertMsg(cLocks == 0, ("cLocks=%u %s\n", cLocks, szNames));
+    }
+#endif
+
+    VBOXSTRICTRC rcStrict;
+    if (VM_IS_EMT(pVM))
+        rcStrict = PGMPhysWrite(pVM, GCPhys, pvBuf, cbWrite, PGMACCESSORIGIN_DEVICE);
+    else
+        rcStrict = PGMR3PhysWriteExternal(pVM, GCPhys, pvBuf, cbWrite, PGMACCESSORIGIN_DEVICE);
+    AssertMsg(rcStrict == VINF_SUCCESS, ("%Rrc\n", VBOXSTRICTRC_VAL(rcStrict))); /** @todo track down the users for this bugger. */
+
+    Log(("pdmR3DevHlp_PhysWrite: caller='%s'/%d: returns %Rrc\n", pDevIns->pReg->szName, pDevIns->iInstance, VBOXSTRICTRC_VAL(rcStrict) ));
+    return VBOXSTRICTRC_VAL(rcStrict);
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnPhysGCPhys2CCPtr} */
+static DECLCALLBACK(int) pdmR3DevHlp_PhysGCPhys2CCPtr(PPDMDEVINS pDevIns, RTGCPHYS GCPhys, uint32_t fFlags, void **ppv, PPGMPAGEMAPLOCK pLock)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    LogFlow(("pdmR3DevHlp_PhysGCPhys2CCPtr: caller='%s'/%d: GCPhys=%RGp fFlags=%#x ppv=%p pLock=%p\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, GCPhys, fFlags, ppv, pLock));
+    AssertReturn(!fFlags, VERR_INVALID_PARAMETER);
+
+#if defined(VBOX_STRICT) && defined(PDM_DEVHLP_DEADLOCK_DETECTION)
+    if (!VM_IS_EMT(pVM))
+    {
+        char szNames[128];
+        uint32_t cLocks = PDMR3CritSectCountOwned(pVM, szNames, sizeof(szNames));
+        AssertMsg(cLocks == 0, ("cLocks=%u %s\n", cLocks, szNames));
+    }
+#endif
+
+    int rc = PGMR3PhysGCPhys2CCPtrExternal(pVM, GCPhys, ppv, pLock);
+
+    Log(("pdmR3DevHlp_PhysGCPhys2CCPtr: caller='%s'/%d: returns %Rrc\n", pDevIns->pReg->szName, pDevIns->iInstance, rc));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnPhysGCPhys2CCPtrReadOnly} */
+static DECLCALLBACK(int) pdmR3DevHlp_PhysGCPhys2CCPtrReadOnly(PPDMDEVINS pDevIns, RTGCPHYS GCPhys, uint32_t fFlags, const void **ppv, PPGMPAGEMAPLOCK pLock)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    LogFlow(("pdmR3DevHlp_PhysGCPhys2CCPtrReadOnly: caller='%s'/%d: GCPhys=%RGp fFlags=%#x ppv=%p pLock=%p\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, GCPhys, fFlags, ppv, pLock));
+    AssertReturn(!fFlags, VERR_INVALID_PARAMETER);
+
+#if defined(VBOX_STRICT) && defined(PDM_DEVHLP_DEADLOCK_DETECTION)
+    if (!VM_IS_EMT(pVM))
+    {
+        char szNames[128];
+        uint32_t cLocks = PDMR3CritSectCountOwned(pVM, szNames, sizeof(szNames));
+        AssertMsg(cLocks == 0, ("cLocks=%u %s\n", cLocks, szNames));
+    }
+#endif
+
+    int rc = PGMR3PhysGCPhys2CCPtrReadOnlyExternal(pVM, GCPhys, ppv, pLock);
+
+    Log(("pdmR3DevHlp_PhysGCPhys2CCPtrReadOnly: caller='%s'/%d: returns %Rrc\n", pDevIns->pReg->szName, pDevIns->iInstance, rc));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnPhysReleasePageMappingLock} */
+static DECLCALLBACK(void) pdmR3DevHlp_PhysReleasePageMappingLock(PPDMDEVINS pDevIns, PPGMPAGEMAPLOCK pLock)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    LogFlow(("pdmR3DevHlp_PhysReleasePageMappingLock: caller='%s'/%d: pLock=%p\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, pLock));
+
+    PGMPhysReleasePageMappingLock(pVM, pLock);
+
+    Log(("pdmR3DevHlp_PhysReleasePageMappingLock: caller='%s'/%d: returns void\n", pDevIns->pReg->szName, pDevIns->iInstance));
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnPhysBulkGCPhys2CCPtr} */
+static DECLCALLBACK(int) pdmR3DevHlp_PhysBulkGCPhys2CCPtr(PPDMDEVINS pDevIns, uint32_t cPages, PCRTGCPHYS paGCPhysPages,
+                                                          uint32_t fFlags, void **papvPages, PPGMPAGEMAPLOCK paLocks)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    LogFlow(("pdmR3DevHlp_PhysBulkGCPhys2CCPtr: caller='%s'/%d: cPages=%#x paGCPhysPages=%p (%RGp,..) fFlags=%#x papvPages=%p paLocks=%p\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, cPages, paGCPhysPages, paGCPhysPages[0], fFlags, papvPages, paLocks));
+    AssertReturn(!fFlags, VERR_INVALID_PARAMETER);
+    AssertReturn(cPages > 0, VERR_INVALID_PARAMETER);
+
+#if defined(VBOX_STRICT) && defined(PDM_DEVHLP_DEADLOCK_DETECTION)
+    if (!VM_IS_EMT(pVM))
+    {
+        char szNames[128];
+        uint32_t cLocks = PDMR3CritSectCountOwned(pVM, szNames, sizeof(szNames));
+        AssertMsg(cLocks == 0, ("cLocks=%u %s\n", cLocks, szNames));
+    }
+#endif
+
+    int rc = PGMR3PhysBulkGCPhys2CCPtrExternal(pVM, cPages, paGCPhysPages, papvPages, paLocks);
+
+    Log(("pdmR3DevHlp_PhysBulkGCPhys2CCPtr: caller='%s'/%d: returns %Rrc\n", pDevIns->pReg->szName, pDevIns->iInstance, rc));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnPhysBulkGCPhys2CCPtrReadOnly} */
+static DECLCALLBACK(int) pdmR3DevHlp_PhysBulkGCPhys2CCPtrReadOnly(PPDMDEVINS pDevIns, uint32_t cPages, PCRTGCPHYS paGCPhysPages,
+                                                                  uint32_t fFlags, const void **papvPages, PPGMPAGEMAPLOCK paLocks)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    LogFlow(("pdmR3DevHlp_PhysBulkGCPhys2CCPtrReadOnly: caller='%s'/%d: cPages=%#x paGCPhysPages=%p (%RGp,...) fFlags=%#x papvPages=%p paLocks=%p\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, cPages, paGCPhysPages, paGCPhysPages[0], fFlags, papvPages, paLocks));
+    AssertReturn(!fFlags, VERR_INVALID_PARAMETER);
+    AssertReturn(cPages > 0, VERR_INVALID_PARAMETER);
+
+#if defined(VBOX_STRICT) && defined(PDM_DEVHLP_DEADLOCK_DETECTION)
+    if (!VM_IS_EMT(pVM))
+    {
+        char szNames[128];
+        uint32_t cLocks = PDMR3CritSectCountOwned(pVM, szNames, sizeof(szNames));
+        AssertMsg(cLocks == 0, ("cLocks=%u %s\n", cLocks, szNames));
+    }
+#endif
+
+    int rc = PGMR3PhysBulkGCPhys2CCPtrReadOnlyExternal(pVM, cPages, paGCPhysPages, papvPages, paLocks);
+
+    Log(("pdmR3DevHlp_PhysBulkGCPhys2CCPtrReadOnly: caller='%s'/%d: returns %Rrc\n", pDevIns->pReg->szName, pDevIns->iInstance, rc));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnPhysBulkReleasePageMappingLocks} */
+static DECLCALLBACK(void) pdmR3DevHlp_PhysBulkReleasePageMappingLocks(PPDMDEVINS pDevIns, uint32_t cPages, PPGMPAGEMAPLOCK paLocks)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    LogFlow(("pdmR3DevHlp_PhysBulkReleasePageMappingLocks: caller='%s'/%d: cPages=%#x paLocks=%p\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, cPages, paLocks));
+    Assert(cPages > 0);
+
+    PGMPhysBulkReleasePageMappingLocks(pVM, cPages, paLocks);
+
+    Log(("pdmR3DevHlp_PhysBulkReleasePageMappingLocks: caller='%s'/%d: returns void\n", pDevIns->pReg->szName, pDevIns->iInstance));
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnPhysReadGCVirt} */
+static DECLCALLBACK(int) pdmR3DevHlp_PhysReadGCVirt(PPDMDEVINS pDevIns, void *pvDst, RTGCPTR GCVirtSrc, size_t cb)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    VM_ASSERT_EMT(pVM);
+    LogFlow(("pdmR3DevHlp_PhysReadGCVirt: caller='%s'/%d: pvDst=%p GCVirt=%RGv cb=%#x\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, pvDst, GCVirtSrc, cb));
+
+    PVMCPU pVCpu = VMMGetCpu(pVM);
+    if (!pVCpu)
+        return VERR_ACCESS_DENIED;
+#if defined(VBOX_STRICT) && defined(PDM_DEVHLP_DEADLOCK_DETECTION)
+    /** @todo SMP. */
+#endif
+
+    int rc = PGMPhysSimpleReadGCPtr(pVCpu, pvDst, GCVirtSrc, cb);
+
+    LogFlow(("pdmR3DevHlp_PhysReadGCVirt: caller='%s'/%d: returns %Rrc\n", pDevIns->pReg->szName, pDevIns->iInstance, rc));
+
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnPhysWriteGCVirt} */
+static DECLCALLBACK(int) pdmR3DevHlp_PhysWriteGCVirt(PPDMDEVINS pDevIns, RTGCPTR GCVirtDst, const void *pvSrc, size_t cb)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    VM_ASSERT_EMT(pVM);
+    LogFlow(("pdmR3DevHlp_PhysWriteGCVirt: caller='%s'/%d: GCVirtDst=%RGv pvSrc=%p cb=%#x\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, GCVirtDst, pvSrc, cb));
+
+    PVMCPU pVCpu = VMMGetCpu(pVM);
+    if (!pVCpu)
+        return VERR_ACCESS_DENIED;
+#if defined(VBOX_STRICT) && defined(PDM_DEVHLP_DEADLOCK_DETECTION)
+    /** @todo SMP. */
+#endif
+
+    int rc = PGMPhysSimpleWriteGCPtr(pVCpu, GCVirtDst, pvSrc, cb);
+
+    LogFlow(("pdmR3DevHlp_PhysWriteGCVirt: caller='%s'/%d: returns %Rrc\n", pDevIns->pReg->szName, pDevIns->iInstance, rc));
+
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnPhysGCPtr2GCPhys} */
+static DECLCALLBACK(int) pdmR3DevHlp_PhysGCPtr2GCPhys(PPDMDEVINS pDevIns, RTGCPTR GCPtr, PRTGCPHYS pGCPhys)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    VM_ASSERT_EMT(pVM);
+    LogFlow(("pdmR3DevHlp_PhysGCPtr2GCPhys: caller='%s'/%d: GCPtr=%RGv pGCPhys=%p\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, GCPtr, pGCPhys));
+
+    PVMCPU pVCpu = VMMGetCpu(pVM);
+    if (!pVCpu)
+        return VERR_ACCESS_DENIED;
+#if defined(VBOX_STRICT) && defined(PDM_DEVHLP_DEADLOCK_DETECTION)
+    /** @todo SMP. */
+#endif
+
+    int rc = PGMPhysGCPtr2GCPhys(pVCpu, GCPtr, pGCPhys);
+
+    LogFlow(("pdmR3DevHlp_PhysGCPtr2GCPhys: caller='%s'/%d: returns %Rrc *pGCPhys=%RGp\n", pDevIns->pReg->szName, pDevIns->iInstance, rc, *pGCPhys));
+
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnMMHeapAlloc} */
+static DECLCALLBACK(void *) pdmR3DevHlp_MMHeapAlloc(PPDMDEVINS pDevIns, size_t cb)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    LogFlow(("pdmR3DevHlp_MMHeapAlloc: caller='%s'/%d: cb=%#x\n", pDevIns->pReg->szName, pDevIns->iInstance, cb));
+
+    void *pv = MMR3HeapAlloc(pDevIns->Internal.s.pVMR3, MM_TAG_PDM_DEVICE_USER, cb);
+
+    LogFlow(("pdmR3DevHlp_MMHeapAlloc: caller='%s'/%d: returns %p\n", pDevIns->pReg->szName, pDevIns->iInstance, pv));
+    return pv;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnMMHeapAllocZ} */
+static DECLCALLBACK(void *) pdmR3DevHlp_MMHeapAllocZ(PPDMDEVINS pDevIns, size_t cb)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    LogFlow(("pdmR3DevHlp_MMHeapAllocZ: caller='%s'/%d: cb=%#x\n", pDevIns->pReg->szName, pDevIns->iInstance, cb));
+
+    void *pv = MMR3HeapAllocZ(pDevIns->Internal.s.pVMR3, MM_TAG_PDM_DEVICE_USER, cb);
+
+    LogFlow(("pdmR3DevHlp_MMHeapAllocZ: caller='%s'/%d: returns %p\n", pDevIns->pReg->szName, pDevIns->iInstance, pv));
+    return pv;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnMMHeapFree} */
+static DECLCALLBACK(void) pdmR3DevHlp_MMHeapFree(PPDMDEVINS pDevIns, void *pv)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns); RT_NOREF_PV(pDevIns);
+    LogFlow(("pdmR3DevHlp_MMHeapFree: caller='%s'/%d: pv=%p\n", pDevIns->pReg->szName, pDevIns->iInstance, pv));
+
+    MMR3HeapFree(pv);
+
+    LogFlow(("pdmR3DevHlp_MMHeapAlloc: caller='%s'/%d: returns void\n", pDevIns->pReg->szName, pDevIns->iInstance));
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnVMState} */
+static DECLCALLBACK(VMSTATE) pdmR3DevHlp_VMState(PPDMDEVINS pDevIns)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+
+    VMSTATE enmVMState = VMR3GetState(pDevIns->Internal.s.pVMR3);
+
+    LogFlow(("pdmR3DevHlp_VMState: caller='%s'/%d: returns %d (%s)\n", pDevIns->pReg->szName, pDevIns->iInstance,
+             enmVMState, VMR3GetStateName(enmVMState)));
+    return enmVMState;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnVMTeleportedAndNotFullyResumedYet} */
+static DECLCALLBACK(bool) pdmR3DevHlp_VMTeleportedAndNotFullyResumedYet(PPDMDEVINS pDevIns)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+
+    bool fRc = VMR3TeleportedAndNotFullyResumedYet(pDevIns->Internal.s.pVMR3);
+
+    LogFlow(("pdmR3DevHlp_VMState: caller='%s'/%d: returns %RTbool\n", pDevIns->pReg->szName, pDevIns->iInstance,
+             fRc));
+    return fRc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnVMSetError} */
+static DECLCALLBACK(int) pdmR3DevHlp_VMSetError(PPDMDEVINS pDevIns, int rc, RT_SRC_POS_DECL, const char *pszFormat, ...)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    va_list args;
+    va_start(args, pszFormat);
+    int rc2 = VMSetErrorV(pDevIns->Internal.s.pVMR3, rc, RT_SRC_POS_ARGS, pszFormat, args); Assert(rc2 == rc); NOREF(rc2);
+    va_end(args);
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnVMSetErrorV} */
+static DECLCALLBACK(int) pdmR3DevHlp_VMSetErrorV(PPDMDEVINS pDevIns, int rc, RT_SRC_POS_DECL, const char *pszFormat, va_list va)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    int rc2 = VMSetErrorV(pDevIns->Internal.s.pVMR3, rc, RT_SRC_POS_ARGS, pszFormat, va); Assert(rc2 == rc); NOREF(rc2);
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnVMSetRuntimeError} */
+static DECLCALLBACK(int) pdmR3DevHlp_VMSetRuntimeError(PPDMDEVINS pDevIns, uint32_t fFlags, const char *pszErrorId, const char *pszFormat, ...)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    va_list args;
+    va_start(args, pszFormat);
+    int rc = VMSetRuntimeErrorV(pDevIns->Internal.s.pVMR3, fFlags, pszErrorId, pszFormat, args);
+    va_end(args);
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnVMSetRuntimeErrorV} */
+static DECLCALLBACK(int) pdmR3DevHlp_VMSetRuntimeErrorV(PPDMDEVINS pDevIns, uint32_t fFlags, const char *pszErrorId, const char *pszFormat, va_list va)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    int rc = VMSetRuntimeErrorV(pDevIns->Internal.s.pVMR3, fFlags, pszErrorId, pszFormat, va);
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnDBGFStopV} */
+static DECLCALLBACK(int) pdmR3DevHlp_DBGFStopV(PPDMDEVINS pDevIns, const char *pszFile, unsigned iLine, const char *pszFunction, const char *pszFormat, va_list args)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+#ifdef LOG_ENABLED
+    va_list va2;
+    va_copy(va2, args);
+    LogFlow(("pdmR3DevHlp_DBGFStopV: caller='%s'/%d: pszFile=%p:{%s} iLine=%d pszFunction=%p:{%s} pszFormat=%p:{%s} (%N)\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, pszFile, pszFile, iLine, pszFunction, pszFunction, pszFormat, pszFormat, pszFormat, &va2));
+    va_end(va2);
+#endif
+
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    VM_ASSERT_EMT(pVM);
+    int rc = DBGFR3EventSrcV(pVM, DBGFEVENT_DEV_STOP, pszFile, iLine, pszFunction, pszFormat, args);
+    if (rc == VERR_DBGF_NOT_ATTACHED)
+        rc = VINF_SUCCESS;
+
+    LogFlow(("pdmR3DevHlp_DBGFStopV: caller='%s'/%d: returns %Rrc\n", pDevIns->pReg->szName, pDevIns->iInstance, rc));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnDBGFInfoRegister} */
+static DECLCALLBACK(int) pdmR3DevHlp_DBGFInfoRegister(PPDMDEVINS pDevIns, const char *pszName, const char *pszDesc, PFNDBGFHANDLERDEV pfnHandler)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    LogFlow(("pdmR3DevHlp_DBGFInfoRegister: caller='%s'/%d: pszName=%p:{%s} pszDesc=%p:{%s} pfnHandler=%p\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, pszName, pszName, pszDesc, pszDesc, pfnHandler));
+
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    VM_ASSERT_EMT(pVM);
+    int rc = DBGFR3InfoRegisterDevice(pVM, pszName, pszDesc, pfnHandler, pDevIns);
+
+    LogFlow(("pdmR3DevHlp_DBGFInfoRegister: caller='%s'/%d: returns %Rrc\n", pDevIns->pReg->szName, pDevIns->iInstance, rc));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnDBGFInfoRegisterArgv} */
+static DECLCALLBACK(int) pdmR3DevHlp_DBGFInfoRegisterArgv(PPDMDEVINS pDevIns, const char *pszName, const char *pszDesc, PFNDBGFINFOARGVDEV pfnHandler)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    LogFlow(("pdmR3DevHlp_DBGFInfoRegisterArgv: caller='%s'/%d: pszName=%p:{%s} pszDesc=%p:{%s} pfnHandler=%p\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, pszName, pszName, pszDesc, pszDesc, pfnHandler));
+
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    VM_ASSERT_EMT(pVM);
+    int rc = DBGFR3InfoRegisterDeviceArgv(pVM, pszName, pszDesc, pfnHandler, pDevIns);
+
+    LogFlow(("pdmR3DevHlp_DBGFInfoRegisterArgv: caller='%s'/%d: returns %Rrc\n", pDevIns->pReg->szName, pDevIns->iInstance, rc));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnDBGFRegRegister} */
+static DECLCALLBACK(int) pdmR3DevHlp_DBGFRegRegister(PPDMDEVINS pDevIns, PCDBGFREGDESC paRegisters)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    LogFlow(("pdmR3DevHlp_DBGFRegRegister: caller='%s'/%d: paRegisters=%p\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, paRegisters));
+
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    VM_ASSERT_EMT(pVM);
+    int rc = DBGFR3RegRegisterDevice(pVM, paRegisters, pDevIns, pDevIns->pReg->szName, pDevIns->iInstance);
+
+    LogFlow(("pdmR3DevHlp_DBGFRegRegister: caller='%s'/%d: returns %Rrc\n", pDevIns->pReg->szName, pDevIns->iInstance, rc));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnDBGFTraceBuf} */
+static DECLCALLBACK(RTTRACEBUF) pdmR3DevHlp_DBGFTraceBuf(PPDMDEVINS pDevIns)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    RTTRACEBUF hTraceBuf = pDevIns->Internal.s.pVMR3->hTraceBufR3;
+    LogFlow(("pdmR3DevHlp_DBGFTraceBuf: caller='%s'/%d: returns %p\n", pDevIns->pReg->szName, pDevIns->iInstance, hTraceBuf));
+    return hTraceBuf;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnSTAMRegister} */
+static DECLCALLBACK(void) pdmR3DevHlp_STAMRegister(PPDMDEVINS pDevIns, void *pvSample, STAMTYPE enmType, const char *pszName,
+                                                   STAMUNIT enmUnit, const char *pszDesc)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    VM_ASSERT_EMT(pVM);
+
+    int rc;
+    if (*pszName == '/')
+        rc = STAMR3Register(pVM, pvSample, enmType, STAMVISIBILITY_ALWAYS, pszName, enmUnit, pszDesc);
+    /* Provide default device statistics prefix: */
+    else if (pDevIns->pReg->cMaxInstances == 1)
+        rc = STAMR3RegisterF(pVM, pvSample, enmType, STAMVISIBILITY_ALWAYS, enmUnit, pszDesc,
+                             "/Devices/%s/%s", pDevIns->pReg->szName, pszName);
+    else
+        rc = STAMR3RegisterF(pVM, pvSample, enmType, STAMVISIBILITY_ALWAYS, enmUnit, pszDesc,
+                             "/Devices/%s#%u/%s", pDevIns->pReg->szName, pDevIns->iInstance, pszName);
+    AssertRC(rc);
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnSTAMRegisterV} */
+static DECLCALLBACK(void) pdmR3DevHlp_STAMRegisterV(PPDMDEVINS pDevIns, void *pvSample, STAMTYPE enmType, STAMVISIBILITY enmVisibility,
+                                                    STAMUNIT enmUnit, const char *pszDesc, const char *pszName, va_list args)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    VM_ASSERT_EMT(pVM);
+
+    int rc;
+    if (*pszName == '/')
+        rc = STAMR3RegisterV(pVM, pvSample, enmType, enmVisibility, enmUnit, pszDesc, pszName, args);
+    else
+    {
+        /* Provide default device statistics prefix: */
+        va_list vaCopy;
+        va_copy(vaCopy, args);
+        if (pDevIns->pReg->cMaxInstances == 1)
+            rc = STAMR3RegisterF(pVM, pvSample, enmType, enmVisibility, enmUnit, pszDesc,
+                                 "/Devices/%s/%N", pDevIns->pReg->szName, pszName, &vaCopy);
+        else
+            rc = STAMR3RegisterF(pVM, pvSample, enmType, enmVisibility, enmUnit, pszDesc,
+                                 "/Devices/%s#%u/%N", pDevIns->pReg->szName, pDevIns->iInstance, pszName, &vaCopy);
+        va_end(vaCopy);
+    }
+    AssertRC(rc);
+}
+
+
+/**
+ * @interface_method_impl{PDMDEVHLPR3,pfnPCIRegister}
+ */
+static DECLCALLBACK(int) pdmR3DevHlp_PCIRegister(PPDMDEVINS pDevIns, PPDMPCIDEV pPciDev, uint32_t fFlags,
+                                                 uint8_t uPciDevNo, uint8_t uPciFunNo, const char *pszName)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    VM_ASSERT_EMT(pVM);
+    LogFlow(("pdmR3DevHlp_PCIRegister: caller='%s'/%d: pPciDev=%p:{.config={%#.256Rhxs} fFlags=%#x uPciDevNo=%#x uPciFunNo=%#x pszName=%p:{%s}\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, pPciDev, pPciDev->abConfig, fFlags, uPciDevNo, uPciFunNo, pszName, pszName ? pszName : ""));
+
+    /*
+     * Validate input.
+     */
+    AssertLogRelMsgReturn(pDevIns->pReg->cMaxPciDevices > 0,
+                          ("'%s'/%d: cMaxPciDevices is 0\n", pDevIns->pReg->szName, pDevIns->iInstance),
+                          VERR_WRONG_ORDER);
+    AssertLogRelMsgReturn(RT_VALID_PTR(pPciDev),
+                          ("'%s'/%d: Invalid pPciDev value: %p\n", pDevIns->pReg->szName, pDevIns->iInstance, pPciDev),
+                          VERR_INVALID_POINTER);
+    AssertLogRelMsgReturn(PDMPciDevGetVendorId(pPciDev),
+                          ("'%s'/%d: Vendor ID is not set!\n", pDevIns->pReg->szName, pDevIns->iInstance),
+                          VERR_INVALID_POINTER);
+    AssertLogRelMsgReturn(   uPciDevNo < 32
+                          || uPciDevNo == PDMPCIDEVREG_DEV_NO_FIRST_UNUSED
+                          || uPciDevNo == PDMPCIDEVREG_DEV_NO_SAME_AS_PREV,
+                          ("'%s'/%d: Invalid PCI device number: %#x\n", pDevIns->pReg->szName, pDevIns->iInstance, uPciDevNo),
+                          VERR_INVALID_PARAMETER);
+    AssertLogRelMsgReturn(   uPciFunNo < 8
+                          || uPciFunNo == PDMPCIDEVREG_FUN_NO_FIRST_UNUSED,
+                          ("'%s'/%d: Invalid PCI funcion number: %#x\n", pDevIns->pReg->szName, pDevIns->iInstance, uPciFunNo),
+                          VERR_INVALID_PARAMETER);
+    AssertLogRelMsgReturn(!(fFlags & ~PDMPCIDEVREG_F_VALID_MASK),
+                          ("'%s'/%d: Invalid flags: %#x\n", pDevIns->pReg->szName, pDevIns->iInstance, fFlags),
+                          VERR_INVALID_FLAGS);
+    if (!pszName)
+        pszName = pDevIns->pReg->szName;
+    AssertLogRelReturn(RT_VALID_PTR(pszName), VERR_INVALID_POINTER);
+    AssertLogRelReturn(!pPciDev->Int.s.fRegistered, VERR_PDM_NOT_PCI_DEVICE);
+    AssertLogRelReturn(pPciDev == PDMDEV_GET_PPCIDEV(pDevIns, pPciDev->Int.s.idxSubDev), VERR_PDM_NOT_PCI_DEVICE);
+    AssertLogRelReturn(pPciDev == PDMDEV_CALC_PPCIDEV(pDevIns, pPciDev->Int.s.idxSubDev), VERR_PDM_NOT_PCI_DEVICE);
+    AssertMsgReturn(pPciDev->u32Magic == PDMPCIDEV_MAGIC, ("%#x\n", pPciDev->u32Magic), VERR_PDM_NOT_PCI_DEVICE);
+
+    /*
+     * Check the registration order - must be following PDMDEVINSR3::apPciDevs.
+     */
+    PPDMPCIDEV const pPrevPciDev = pPciDev->Int.s.idxSubDev == 0 ? NULL
+                                 : PDMDEV_GET_PPCIDEV(pDevIns, pPciDev->Int.s.idxSubDev - 1);
+    if (pPrevPciDev)
+    {
+        AssertLogRelReturn(pPrevPciDev->u32Magic == PDMPCIDEV_MAGIC, VERR_INVALID_MAGIC);
+        AssertLogRelReturn(pPrevPciDev->Int.s.fRegistered, VERR_WRONG_ORDER);
+    }
+
+    /*
+     * Resolve the PCI configuration node for the device.  The default (zero'th)
+     * is the same as the PDM device, the rest are "PciCfg1..255" CFGM sub-nodes.
+     */
+    PCFGMNODE pCfg = pDevIns->Internal.s.pCfgHandle;
+    if (pPciDev->Int.s.idxSubDev > 0)
+        pCfg = CFGMR3GetChildF(pDevIns->Internal.s.pCfgHandle, "PciCfg%u", pPciDev->Int.s.idxSubDev);
+
+    /*
+     * We resolve PDMPCIDEVREG_DEV_NO_SAME_AS_PREV, the PCI bus handles
+     * PDMPCIDEVREG_DEV_NO_FIRST_UNUSED and PDMPCIDEVREG_FUN_NO_FIRST_UNUSED.
+     */
+    uint8_t const uPciDevNoRaw = uPciDevNo;
+    uint32_t      uDefPciBusNo = 0;
+    if (uPciDevNo == PDMPCIDEVREG_DEV_NO_SAME_AS_PREV)
+    {
+        if (pPrevPciDev)
+        {
+            uPciDevNo    = pPrevPciDev->uDevFn >> 3;
+            uDefPciBusNo = pPrevPciDev->Int.s.idxPdmBus;
+        }
+        else
+        {
+            /* Look for PCI device registered with an earlier device instance so we can more
+               easily have multiple functions spanning multiple PDM device instances. */
+            PPDMDEVINS pPrevIns = pDevIns->Internal.s.pDevR3->pInstances;
+            for (;;)
+            {
+                AssertLogRelMsgReturn(pPrevIns && pPrevIns != pDevIns,
+                                      ("'%s'/%d: Can't use PDMPCIDEVREG_DEV_NO_SAME_AS_PREV without a previously registered PCI device by the same or earlier PDM device instance!\n",
+                                       pDevIns->pReg->szName, pDevIns->iInstance), VERR_WRONG_ORDER);
+                if (pPrevIns->Internal.s.pNextR3 == pDevIns)
+                    break;
+                pPrevIns = pPrevIns->Internal.s.pNextR3;
+            }
+
+            PPDMPCIDEV pOtherPciDev = PDMDEV_GET_PPCIDEV(pPrevIns, 0);
+            AssertLogRelMsgReturn(pOtherPciDev && pOtherPciDev->Int.s.fRegistered,
+                                  ("'%s'/%d: Can't use PDMPCIDEVREG_DEV_NO_SAME_AS_PREV without a previously registered PCI device by the same or earlier PDM device instance!\n",
+                                   pDevIns->pReg->szName, pDevIns->iInstance),
+                                  VERR_WRONG_ORDER);
+            for (uint32_t iPrevPciDev = 1; iPrevPciDev < pDevIns->cPciDevs; iPrevPciDev++)
+            {
+                PPDMPCIDEV pCur = PDMDEV_GET_PPCIDEV(pPrevIns, iPrevPciDev);
+                AssertBreak(pCur);
+                if (!pCur->Int.s.fRegistered)
+                    break;
+                pOtherPciDev = pCur;
+            }
+
+            uPciDevNo    = pOtherPciDev->uDevFn >> 3;
+            uDefPciBusNo = pOtherPciDev->Int.s.idxPdmBus;
+        }
+    }
+
+    /*
+     * Choose the PCI bus for the device.
+     *
+     * This is simple. If the device was configured for a particular bus, the PCIBusNo
+     * configuration value will be set. If not the default bus is 0.
+     */
+    /** @cfgm{/Devices/NAME/XX/[PciCfgYY/]PCIBusNo, uint8_t, 0, 7, 0}
+     * Selects the PCI bus number of a device.  The default value isn't necessarily
+     * zero if the device is registered using PDMPCIDEVREG_DEV_NO_SAME_AS_PREV, it
+     * will then also inherit the bus number from the previously registered device.
+     */
+    uint8_t u8Bus;
+    int rc = CFGMR3QueryU8Def(pCfg, "PCIBusNo", &u8Bus, (uint8_t)uDefPciBusNo);
+    AssertLogRelMsgRCReturn(rc, ("Configuration error: PCIBusNo query failed with rc=%Rrc (%s/%d)\n",
+                                 rc, pDevIns->pReg->szName, pDevIns->iInstance), rc);
+    AssertLogRelMsgReturn(u8Bus < RT_ELEMENTS(pVM->pdm.s.aPciBuses),
+                          ("Configuration error: PCIBusNo=%d, max is %d. (%s/%d)\n", u8Bus,
+                           RT_ELEMENTS(pVM->pdm.s.aPciBuses), pDevIns->pReg->szName, pDevIns->iInstance),
+                          VERR_PDM_NO_PCI_BUS);
+    pPciDev->Int.s.idxPdmBus = u8Bus;
+    PPDMPCIBUS pBus = &pVM->pdm.s.aPciBuses[u8Bus];
+    if (pBus->pDevInsR3)
+    {
+        /*
+         * Check the configuration for PCI device and function assignment.
+         */
+        /** @cfgm{/Devices/NAME/XX/[PciCfgYY/]PCIDeviceNo, uint8_t, 0, 31}
+         * Overrides the default PCI device number of a device.
+         */
+        uint8_t uCfgDevice;
+        rc = CFGMR3QueryU8(pCfg, "PCIDeviceNo", &uCfgDevice);
+        if (RT_SUCCESS(rc))
+        {
+            AssertMsgReturn(uCfgDevice <= 31,
+                            ("Configuration error: PCIDeviceNo=%d, max is 31. (%s/%d/%d)\n",
+                             uCfgDevice, pDevIns->pReg->szName, pDevIns->iInstance, pPciDev->Int.s.idxSubDev),
+                            VERR_PDM_BAD_PCI_CONFIG);
+            uPciDevNo = uCfgDevice;
+        }
+        else
+            AssertMsgReturn(rc == VERR_CFGM_VALUE_NOT_FOUND || rc == VERR_CFGM_NO_PARENT,
+                            ("Configuration error: PCIDeviceNo query failed with rc=%Rrc (%s/%d/%d)\n",
+                             rc, pDevIns->pReg->szName, pDevIns->iInstance, pPciDev->Int.s.idxSubDev),
+                            rc);
+
+        /** @cfgm{/Devices/NAME/XX/[PciCfgYY/]PCIFunctionNo, uint8_t, 0, 7}
+         * Overrides the default PCI function number of a device.
+         */
+        uint8_t uCfgFunction;
+        rc = CFGMR3QueryU8(pCfg, "PCIFunctionNo", &uCfgFunction);
+        if (RT_SUCCESS(rc))
+        {
+            AssertMsgReturn(uCfgFunction <= 7,
+                            ("Configuration error: PCIFunctionNo=%#x, max is 7. (%s/%d/%d)\n",
+                             uCfgFunction, pDevIns->pReg->szName, pDevIns->iInstance, pPciDev->Int.s.idxSubDev),
+                            VERR_PDM_BAD_PCI_CONFIG);
+            uPciFunNo = uCfgFunction;
+        }
+        else
+            AssertMsgReturn(rc == VERR_CFGM_VALUE_NOT_FOUND || rc == VERR_CFGM_NO_PARENT,
+                            ("Configuration error: PCIFunctionNo query failed with rc=%Rrc (%s/%d/%d)\n",
+                             rc, pDevIns->pReg->szName, pDevIns->iInstance, pPciDev->Int.s.idxSubDev),
+                            rc);
+
+
+        /*
+         * Initialize the internal data.  We only do the wipe and the members
+         * owned by PDM, the PCI bus does the rest in the registration call.
+         */
+        RT_ZERO(pPciDev->Int);
+
+        pPciDev->Int.s.idxDevCfg = pPciDev->Int.s.idxSubDev;
+        pPciDev->Int.s.fReassignableDevNo = uPciDevNoRaw >= VBOX_PCI_MAX_DEVICES;
+        pPciDev->Int.s.fReassignableFunNo = uPciFunNo >= VBOX_PCI_MAX_FUNCTIONS;
+        pPciDev->Int.s.pDevInsR3 = pDevIns;
+        pPciDev->Int.s.idxPdmBus = u8Bus;
+        pPciDev->Int.s.fRegistered = true;
+
+        /* Set some of the public members too. */
+        pPciDev->pszNameR3 = pszName;
+
+        /*
+         * Call the pci bus device to do the actual registration.
+         */
+        pdmLock(pVM);
+        rc = pBus->pfnRegister(pBus->pDevInsR3, pPciDev, fFlags, uPciDevNo, uPciFunNo, pszName);
+        pdmUnlock(pVM);
+        if (RT_SUCCESS(rc))
+            Log(("PDM: Registered device '%s'/%d as PCI device %d on bus %d\n",
+                 pDevIns->pReg->szName, pDevIns->iInstance, pPciDev->uDevFn, pBus->iBus));
+        else
+            pPciDev->Int.s.fRegistered = false;
+    }
+    else
+    {
+        AssertLogRelMsgFailed(("Configuration error: No PCI bus available. This could be related to init order too!\n"));
+        rc = VERR_PDM_NO_PCI_BUS;
+    }
+
+    LogFlow(("pdmR3DevHlp_PCIRegister: caller='%s'/%d: returns %Rrc\n", pDevIns->pReg->szName, pDevIns->iInstance, rc));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnPCIRegisterMsi} */
+static DECLCALLBACK(int) pdmR3DevHlp_PCIRegisterMsi(PPDMDEVINS pDevIns, PPDMPCIDEV pPciDev, PPDMMSIREG pMsiReg)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    if (!pPciDev) /* NULL is an alias for the default PCI device. */
+        pPciDev = pDevIns->apPciDevs[0];
+    AssertReturn(pPciDev, VERR_PDM_NOT_PCI_DEVICE);
+    LogFlow(("pdmR3DevHlp_PCIRegisterMsi: caller='%s'/%d: pPciDev=%p:{%#x} pMsgReg=%p:{cMsiVectors=%d, cMsixVectors=%d}\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, pPciDev, pPciDev->uDevFn, pMsiReg, pMsiReg->cMsiVectors, pMsiReg->cMsixVectors));
+    PDMPCIDEV_ASSERT_VALID_RET(pDevIns, pPciDev);
+
+    AssertLogRelMsgReturn(pDevIns->pReg->cMaxPciDevices > 0,
+                          ("'%s'/%d: cMaxPciDevices is 0\n", pDevIns->pReg->szName, pDevIns->iInstance),
+                          VERR_WRONG_ORDER);
+    AssertLogRelMsgReturn(pMsiReg->cMsixVectors <= pDevIns->pReg->cMaxMsixVectors,
+                          ("'%s'/%d: cMsixVectors=%u cMaxMsixVectors=%u\n",
+                           pDevIns->pReg->szName, pDevIns->iInstance, pMsiReg->cMsixVectors, pDevIns->pReg->cMaxMsixVectors),
+                          VERR_INVALID_FLAGS);
+
+    PVM             pVM    = pDevIns->Internal.s.pVMR3;
+    size_t const    idxBus = pPciDev->Int.s.idxPdmBus;
+    AssertReturn(idxBus < RT_ELEMENTS(pVM->pdm.s.aPciBuses), VERR_WRONG_ORDER);
+    PPDMPCIBUS      pBus   = &pVM->pdm.s.aPciBuses[idxBus];
+
+    pdmLock(pVM);
+    int rc;
+    if (pBus->pfnRegisterMsi)
+        rc = pBus->pfnRegisterMsi(pBus->pDevInsR3, pPciDev, pMsiReg);
+    else
+        rc = VERR_NOT_IMPLEMENTED;
+    pdmUnlock(pVM);
+
+    LogFlow(("pdmR3DevHlp_PCIRegisterMsi: caller='%s'/%d: returns %Rrc\n", pDevIns->pReg->szName, pDevIns->iInstance, rc));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnPCIIORegionRegister} */
+static DECLCALLBACK(int) pdmR3DevHlp_PCIIORegionRegister(PPDMDEVINS pDevIns, PPDMPCIDEV pPciDev, uint32_t iRegion,
+                                                         RTGCPHYS cbRegion, PCIADDRESSSPACE enmType, uint32_t fFlags,
+                                                         uint64_t hHandle, PFNPCIIOREGIONMAP pfnMapUnmap)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    VM_ASSERT_EMT(pVM);
+    if (!pPciDev) /* NULL is an alias for the default PCI device. */
+        pPciDev = pDevIns->apPciDevs[0];
+    AssertReturn(pPciDev, VERR_PDM_NOT_PCI_DEVICE);
+    LogFlow(("pdmR3DevHlp_PCIIORegionRegister: caller='%s'/%d: pPciDev=%p:{%#x} iRegion=%d cbRegion=%RGp enmType=%d fFlags=%#x, hHandle=%#RX64 pfnMapUnmap=%p\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, pPciDev, pPciDev->uDevFn, iRegion, cbRegion, enmType, fFlags, hHandle, pfnMapUnmap));
+    PDMPCIDEV_ASSERT_VALID_RET(pDevIns, pPciDev);
+
+    /*
+     * Validate input.
+     */
+    VM_ASSERT_EMT0_RETURN(pVM, VERR_VM_THREAD_NOT_EMT);
+    AssertLogRelMsgReturn(VMR3GetState(pVM) == VMSTATE_CREATING,
+                          ("caller='%s'/%d: %s\n", pDevIns->pReg->szName, pDevIns->iInstance, VMR3GetStateName(VMR3GetState(pVM))),
+                          VERR_WRONG_ORDER);
+
+    if (iRegion >= VBOX_PCI_NUM_REGIONS)
+    {
+        Assert(iRegion < VBOX_PCI_NUM_REGIONS);
+        LogFlow(("pdmR3DevHlp_PCIIORegionRegister: caller='%s'/%d: returns %Rrc (iRegion)\n", pDevIns->pReg->szName, pDevIns->iInstance, VERR_INVALID_PARAMETER));
+        return VERR_INVALID_PARAMETER;
+    }
+
+    switch ((int)enmType)
+    {
+        case PCI_ADDRESS_SPACE_IO:
+            /*
+             * Sanity check: don't allow to register more than 32K of the PCI I/O space.
+             */
+            AssertLogRelMsgReturn(cbRegion <= _32K,
+                                  ("caller='%s'/%d: %#x\n", pDevIns->pReg->szName, pDevIns->iInstance, cbRegion),
+                                  VERR_INVALID_PARAMETER);
+            break;
+
+        case PCI_ADDRESS_SPACE_MEM:
+        case PCI_ADDRESS_SPACE_MEM_PREFETCH:
+            /*
+             * Sanity check: Don't allow to register more than 2GB of the PCI MMIO space.
+             */
+            AssertLogRelMsgReturn(cbRegion <= MM_MMIO_32_MAX,
+                                  ("caller='%s'/%d: %RGp (max %RGp)\n",
+                                   pDevIns->pReg->szName, pDevIns->iInstance, cbRegion, (RTGCPHYS)MM_MMIO_32_MAX),
+                                  VERR_OUT_OF_RANGE);
+            break;
+
+        case PCI_ADDRESS_SPACE_BAR64 | PCI_ADDRESS_SPACE_MEM:
+        case PCI_ADDRESS_SPACE_BAR64 | PCI_ADDRESS_SPACE_MEM_PREFETCH:
+            /*
+             * Sanity check: Don't allow to register more than 64GB of the 64-bit PCI MMIO space.
+             */
+            AssertLogRelMsgReturn(cbRegion <= MM_MMIO_64_MAX,
+                                  ("caller='%s'/%d: %RGp (max %RGp)\n",
+                                   pDevIns->pReg->szName, pDevIns->iInstance, cbRegion, MM_MMIO_64_MAX),
+                                  VERR_OUT_OF_RANGE);
+            break;
+
+        default:
+            AssertMsgFailed(("enmType=%#x is unknown\n", enmType));
+            LogFlow(("pdmR3DevHlp_PCIIORegionRegister: caller='%s'/%d: returns %Rrc (enmType)\n", pDevIns->pReg->szName, pDevIns->iInstance, VERR_INVALID_PARAMETER));
+            return VERR_INVALID_PARAMETER;
+    }
+
+    AssertMsgReturn(   pfnMapUnmap
+                    || (   hHandle != UINT64_MAX
+                        && (fFlags & PDMPCIDEV_IORGN_F_HANDLE_MASK) != PDMPCIDEV_IORGN_F_NO_HANDLE),
+                    ("caller='%s'/%d: fFlags=%#x hHandle=%#RX64\n", pDevIns->pReg->szName, pDevIns->iInstance, fFlags, hHandle),
+                    VERR_INVALID_PARAMETER);
+
+    AssertMsgReturn(!(fFlags & ~PDMPCIDEV_IORGN_F_VALID_MASK), ("fFlags=%#x\n", fFlags), VERR_INVALID_FLAGS);
+    int rc;
+    switch (fFlags & PDMPCIDEV_IORGN_F_HANDLE_MASK)
+    {
+        case PDMPCIDEV_IORGN_F_NO_HANDLE:
+            break;
+        case PDMPCIDEV_IORGN_F_IOPORT_HANDLE:
+            AssertReturn(enmType == PCI_ADDRESS_SPACE_IO, VERR_INVALID_FLAGS);
+            rc = IOMR3IoPortValidateHandle(pVM, pDevIns, (IOMIOPORTHANDLE)hHandle);
+            AssertRCReturn(rc, rc);
+            break;
+        case PDMPCIDEV_IORGN_F_MMIO_HANDLE:
+            AssertReturn(   (enmType & ~PCI_ADDRESS_SPACE_BAR64) == PCI_ADDRESS_SPACE_MEM
+                         || (enmType & ~PCI_ADDRESS_SPACE_BAR64) == PCI_ADDRESS_SPACE_MEM_PREFETCH,
+                         VERR_INVALID_FLAGS);
+            rc = IOMR3MmioValidateHandle(pVM, pDevIns, (IOMMMIOHANDLE)hHandle);
+            AssertRCReturn(rc, rc);
+            break;
+        case PDMPCIDEV_IORGN_F_MMIO2_HANDLE:
+            AssertReturn(   (enmType & ~PCI_ADDRESS_SPACE_BAR64) == PCI_ADDRESS_SPACE_MEM
+                         || (enmType & ~PCI_ADDRESS_SPACE_BAR64) == PCI_ADDRESS_SPACE_MEM_PREFETCH,
+                         VERR_INVALID_FLAGS);
+            rc = PGMR3PhysMmio2ValidateHandle(pVM, pDevIns, (PGMMMIO2HANDLE)hHandle);
+            AssertRCReturn(rc, rc);
+            break;
+        default:
+            AssertFailedReturn(VERR_IPE_NOT_REACHED_DEFAULT_CASE);
+            break;
+    }
+
+    /* This flag is required now. */
+    AssertLogRelMsgReturn(fFlags & PDMPCIDEV_IORGN_F_NEW_STYLE,
+                          ("'%s'/%d: Invalid flags: %#x\n", pDevIns->pReg->szName, pDevIns->iInstance, fFlags),
+                          VERR_INVALID_FLAGS);
+
+    /*
+     * We're currently restricted to page aligned MMIO regions.
+     */
+    if (   ((enmType & ~(PCI_ADDRESS_SPACE_BAR64 | PCI_ADDRESS_SPACE_MEM_PREFETCH)) == PCI_ADDRESS_SPACE_MEM)
+        && cbRegion != RT_ALIGN_64(cbRegion, PAGE_SIZE))
+    {
+        Log(("pdmR3DevHlp_PCIIORegionRegister: caller='%s'/%d: aligning cbRegion %RGp -> %RGp\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, cbRegion, RT_ALIGN_64(cbRegion, PAGE_SIZE)));
+        cbRegion = RT_ALIGN_64(cbRegion, PAGE_SIZE);
+    }
+
+    /*
+     * For registering PCI MMIO memory or PCI I/O memory, the size of the region must be a power of 2!
+     */
+    int iLastSet = ASMBitLastSetU64(cbRegion);
+    Assert(iLastSet > 0);
+    uint64_t cbRegionAligned = RT_BIT_64(iLastSet - 1);
+    if (cbRegion > cbRegionAligned)
+        cbRegion = cbRegionAligned * 2; /* round up */
+
+    size_t const    idxBus = pPciDev->Int.s.idxPdmBus;
+    AssertReturn(idxBus < RT_ELEMENTS(pVM->pdm.s.aPciBuses), VERR_WRONG_ORDER);
+    PPDMPCIBUS      pBus   = &pVM->pdm.s.aPciBuses[idxBus];
+
+    pdmLock(pVM);
+    rc = pBus->pfnIORegionRegister(pBus->pDevInsR3, pPciDev, iRegion, cbRegion, enmType, fFlags, hHandle, pfnMapUnmap);
+    pdmUnlock(pVM);
+
+    LogFlow(("pdmR3DevHlp_PCIIORegionRegister: caller='%s'/%d: returns %Rrc\n", pDevIns->pReg->szName, pDevIns->iInstance, rc));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnPCIInterceptConfigAccesses} */
+static DECLCALLBACK(int) pdmR3DevHlp_PCIInterceptConfigAccesses(PPDMDEVINS pDevIns, PPDMPCIDEV pPciDev,
+                                                                PFNPCICONFIGREAD pfnRead, PFNPCICONFIGWRITE pfnWrite)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    VM_ASSERT_EMT(pVM);
+    if (!pPciDev) /* NULL is an alias for the default PCI device. */
+        pPciDev = pDevIns->apPciDevs[0];
+    AssertReturn(pPciDev, VERR_PDM_NOT_PCI_DEVICE);
+    LogFlow(("pdmR3DevHlp_PCIInterceptConfigAccesses: caller='%s'/%d: pPciDev=%p pfnRead=%p pfnWrite=%p\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, pPciDev, pfnRead, pfnWrite));
+    PDMPCIDEV_ASSERT_VALID_RET(pDevIns, pPciDev);
+
+    /*
+     * Validate input.
+     */
+    AssertPtr(pfnRead);
+    AssertPtr(pfnWrite);
+    AssertPtr(pPciDev);
+
+    size_t const    idxBus = pPciDev->Int.s.idxPdmBus;
+    AssertReturn(idxBus < RT_ELEMENTS(pVM->pdm.s.aPciBuses), VERR_INTERNAL_ERROR_2);
+    PPDMPCIBUS      pBus   = &pVM->pdm.s.aPciBuses[idxBus];
+    AssertRelease(VMR3GetState(pVM) != VMSTATE_RUNNING);
+
+    /*
+     * Do the job.
+     */
+    pdmLock(pVM);
+    pBus->pfnInterceptConfigAccesses(pBus->pDevInsR3, pPciDev, pfnRead, pfnWrite);
+    pdmUnlock(pVM);
+
+    LogFlow(("pdmR3DevHlp_PCIInterceptConfigAccesses: caller='%s'/%d: returns VINF_SUCCESS\n",
+             pDevIns->pReg->szName, pDevIns->iInstance));
+    return VINF_SUCCESS;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnPCIConfigWrite} */
+static DECLCALLBACK(VBOXSTRICTRC)
+pdmR3DevHlp_PCIConfigWrite(PPDMDEVINS pDevIns, PPDMPCIDEV pPciDev, uint32_t uAddress, unsigned cb, uint32_t u32Value)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    AssertPtrReturn(pPciDev, VERR_PDM_NOT_PCI_DEVICE);
+    LogFlow(("pdmR3DevHlp_PCIConfigWrite: caller='%s'/%d: pPciDev=%p uAddress=%#x cd=%d u32Value=%#x\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, pPciDev, uAddress, cb, u32Value));
+
+    /*
+     * Resolve the bus.
+     */
+    size_t const    idxBus = pPciDev->Int.s.idxPdmBus;
+    AssertReturn(idxBus < RT_ELEMENTS(pVM->pdm.s.aPciBuses), VERR_INTERNAL_ERROR_2);
+    PPDMPCIBUS      pBus   = &pVM->pdm.s.aPciBuses[idxBus];
+
+    /*
+     * Do the job.
+     */
+    VBOXSTRICTRC rcStrict = pBus->pfnConfigWrite(pBus->pDevInsR3, pPciDev, uAddress, cb, u32Value);
+
+    LogFlow(("pdmR3DevHlp_PCIConfigWrite: caller='%s'/%d: returns %Rrc\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, VBOXSTRICTRC_VAL(rcStrict)));
+    return rcStrict;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnPCIConfigRead} */
+static DECLCALLBACK(VBOXSTRICTRC)
+pdmR3DevHlp_PCIConfigRead(PPDMDEVINS pDevIns, PPDMPCIDEV pPciDev, uint32_t uAddress, unsigned cb, uint32_t *pu32Value)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    AssertPtrReturn(pPciDev, VERR_PDM_NOT_PCI_DEVICE);
+    LogFlow(("pdmR3DevHlp_PCIConfigRead: caller='%s'/%d: pPciDev=%p uAddress=%#x cd=%d pu32Value=%p:{%#x}\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, pPciDev, uAddress, cb, pu32Value, *pu32Value));
+
+    /*
+     * Resolve the bus.
+     */
+    size_t const    idxBus = pPciDev->Int.s.idxPdmBus;
+    AssertReturn(idxBus < RT_ELEMENTS(pVM->pdm.s.aPciBuses), VERR_INTERNAL_ERROR_2);
+    PPDMPCIBUS      pBus   = &pVM->pdm.s.aPciBuses[idxBus];
+
+    /*
+     * Do the job.
+     */
+    VBOXSTRICTRC rcStrict = pBus->pfnConfigRead(pBus->pDevInsR3, pPciDev, uAddress, cb, pu32Value);
+
+    LogFlow(("pdmR3DevHlp_PCIConfigRead: caller='%s'/%d: returns %Rrc (*pu32Value=%#x)\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, VBOXSTRICTRC_VAL(rcStrict), *pu32Value));
+    return rcStrict;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnPCIPhysRead} */
+static DECLCALLBACK(int)
+pdmR3DevHlp_PCIPhysRead(PPDMDEVINS pDevIns, PPDMPCIDEV pPciDev, RTGCPHYS GCPhys, void *pvBuf, size_t cbRead)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    if (!pPciDev) /* NULL is an alias for the default PCI device. */
+        pPciDev = pDevIns->apPciDevs[0];
+    AssertReturn(pPciDev, VERR_PDM_NOT_PCI_DEVICE);
+    PDMPCIDEV_ASSERT_VALID_AND_REGISTERED(pDevIns, pPciDev);
+
+#ifndef PDM_DO_NOT_RESPECT_PCI_BM_BIT
+    /*
+     * Just check the busmaster setting here and forward the request to the generic read helper.
+     */
+    if (PCIDevIsBusmaster(pPciDev))
+    { /* likely */ }
+    else
+    {
+        Log(("pdmR3DevHlp_PCIPhysRead: caller='%s'/%d: returns %Rrc - Not bus master! GCPhys=%RGp cbRead=%#zx\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, VERR_PDM_NOT_PCI_BUS_MASTER, GCPhys, cbRead));
+        memset(pvBuf, 0xff, cbRead);
+        return VERR_PDM_NOT_PCI_BUS_MASTER;
+    }
+#endif
+
+    return pDevIns->pHlpR3->pfnPhysRead(pDevIns, GCPhys, pvBuf, cbRead);
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnPCIPhysWrite} */
+static DECLCALLBACK(int)
+pdmR3DevHlp_PCIPhysWrite(PPDMDEVINS pDevIns, PPDMPCIDEV pPciDev, RTGCPHYS GCPhys, const void *pvBuf, size_t cbWrite)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    if (!pPciDev) /* NULL is an alias for the default PCI device. */
+        pPciDev = pDevIns->apPciDevs[0];
+    AssertReturn(pPciDev, VERR_PDM_NOT_PCI_DEVICE);
+    PDMPCIDEV_ASSERT_VALID_AND_REGISTERED(pDevIns, pPciDev);
+
+#ifndef PDM_DO_NOT_RESPECT_PCI_BM_BIT
+    /*
+     * Just check the busmaster setting here and forward the request to the generic read helper.
+     */
+    if (PCIDevIsBusmaster(pPciDev))
+    { /* likely */ }
+    else
+    {
+        Log(("pdmR3DevHlp_PCIPhysWrite: caller='%s'/%d: returns %Rrc - Not bus master! GCPhys=%RGp cbWrite=%#zx\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, VERR_PDM_NOT_PCI_BUS_MASTER, GCPhys, cbWrite));
+        return VERR_PDM_NOT_PCI_BUS_MASTER;
+    }
+#endif
+
+    return pDevIns->pHlpR3->pfnPhysWrite(pDevIns, GCPhys, pvBuf, cbWrite);
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnPCISetIrq} */
+static DECLCALLBACK(void) pdmR3DevHlp_PCISetIrq(PPDMDEVINS pDevIns, PPDMPCIDEV pPciDev, int iIrq, int iLevel)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    if (!pPciDev) /* NULL is an alias for the default PCI device. */
+        pPciDev = pDevIns->apPciDevs[0];
+    AssertReturnVoid(pPciDev);
+    LogFlow(("pdmR3DevHlp_PCISetIrq: caller='%s'/%d: pPciDev=%p:{%#x} iIrq=%d iLevel=%d\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, pPciDev, pPciDev->uDevFn, iIrq, iLevel));
+    PDMPCIDEV_ASSERT_VALID_AND_REGISTERED(pDevIns, pPciDev);
+
+    /*
+     * Validate input.
+     */
+    Assert(iIrq == 0);
+    Assert((uint32_t)iLevel <= PDM_IRQ_LEVEL_FLIP_FLOP);
+
+    /*
+     * Must have a PCI device registered!
+     */
+    PVM             pVM    = pDevIns->Internal.s.pVMR3;
+    size_t const    idxBus = pPciDev->Int.s.idxPdmBus;
+    AssertReturnVoid(idxBus < RT_ELEMENTS(pVM->pdm.s.aPciBuses));
+    PPDMPCIBUS      pBus   = &pVM->pdm.s.aPciBuses[idxBus];
+
+    pdmLock(pVM);
+    uint32_t uTagSrc;
+    if (iLevel & PDM_IRQ_LEVEL_HIGH)
+    {
+        pDevIns->Internal.s.uLastIrqTag = uTagSrc = pdmCalcIrqTag(pVM, pDevIns->idTracing);
+        if (iLevel == PDM_IRQ_LEVEL_HIGH)
+            VBOXVMM_PDM_IRQ_HIGH(VMMGetCpu(pVM), RT_LOWORD(uTagSrc), RT_HIWORD(uTagSrc));
+        else
+            VBOXVMM_PDM_IRQ_HILO(VMMGetCpu(pVM), RT_LOWORD(uTagSrc), RT_HIWORD(uTagSrc));
+    }
+    else
+        uTagSrc = pDevIns->Internal.s.uLastIrqTag;
+
+    pBus->pfnSetIrqR3(pBus->pDevInsR3, pPciDev, iIrq, iLevel, uTagSrc);
+
+    if (iLevel == PDM_IRQ_LEVEL_LOW)
+        VBOXVMM_PDM_IRQ_LOW(VMMGetCpu(pVM), RT_LOWORD(uTagSrc), RT_HIWORD(uTagSrc));
+    pdmUnlock(pVM);
+
+    LogFlow(("pdmR3DevHlp_PCISetIrq: caller='%s'/%d: returns void\n", pDevIns->pReg->szName, pDevIns->iInstance));
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnPCISetIrqNoWait} */
+static DECLCALLBACK(void) pdmR3DevHlp_PCISetIrqNoWait(PPDMDEVINS pDevIns, PPDMPCIDEV pPciDev, int iIrq, int iLevel)
+{
+    pdmR3DevHlp_PCISetIrq(pDevIns, pPciDev, iIrq, iLevel);
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnISASetIrq} */
+static DECLCALLBACK(void) pdmR3DevHlp_ISASetIrq(PPDMDEVINS pDevIns, int iIrq, int iLevel)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    LogFlow(("pdmR3DevHlp_ISASetIrq: caller='%s'/%d: iIrq=%d iLevel=%d\n", pDevIns->pReg->szName, pDevIns->iInstance, iIrq, iLevel));
+
+    /*
+     * Validate input.
+     */
+    Assert(iIrq < 16);
+    Assert((uint32_t)iLevel <= PDM_IRQ_LEVEL_FLIP_FLOP);
+
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+
+    /*
+     * Do the job.
+     */
+    pdmLock(pVM);
+    uint32_t uTagSrc;
+    if (iLevel & PDM_IRQ_LEVEL_HIGH)
+    {
+        pDevIns->Internal.s.uLastIrqTag = uTagSrc = pdmCalcIrqTag(pVM, pDevIns->idTracing);
+        if (iLevel == PDM_IRQ_LEVEL_HIGH)
+            VBOXVMM_PDM_IRQ_HIGH(VMMGetCpu(pVM), RT_LOWORD(uTagSrc), RT_HIWORD(uTagSrc));
+        else
+            VBOXVMM_PDM_IRQ_HILO(VMMGetCpu(pVM), RT_LOWORD(uTagSrc), RT_HIWORD(uTagSrc));
+    }
+    else
+        uTagSrc = pDevIns->Internal.s.uLastIrqTag;
+
+    PDMIsaSetIrq(pVM, iIrq, iLevel, uTagSrc);  /* (The API takes the lock recursively.) */
+
+    if (iLevel == PDM_IRQ_LEVEL_LOW)
+        VBOXVMM_PDM_IRQ_LOW(VMMGetCpu(pVM), RT_LOWORD(uTagSrc), RT_HIWORD(uTagSrc));
+    pdmUnlock(pVM);
+
+    LogFlow(("pdmR3DevHlp_ISASetIrq: caller='%s'/%d: returns void\n", pDevIns->pReg->szName, pDevIns->iInstance));
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnISASetIrqNoWait} */
+static DECLCALLBACK(void) pdmR3DevHlp_ISASetIrqNoWait(PPDMDEVINS pDevIns, int iIrq, int iLevel)
+{
+    pdmR3DevHlp_ISASetIrq(pDevIns, iIrq, iLevel);
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnIoApicSendMsi} */
+static DECLCALLBACK(void) pdmR3DevHlp_IoApicSendMsi(PPDMDEVINS pDevIns, RTGCPHYS GCPhys, uint32_t uValue)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    LogFlow(("pdmR3DevHlp_IoApicSendMsi: caller='%s'/%d: GCPhys=%RGp uValue=%#x\n", pDevIns->pReg->szName, pDevIns->iInstance, GCPhys, uValue));
+
+    /*
+     * Validate input.
+     */
+    Assert(GCPhys != 0);
+    Assert(uValue != 0);
+
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+
+    /*
+     * Do the job.
+     */
+    pdmLock(pVM);
+    uint32_t uTagSrc;
+    pDevIns->Internal.s.uLastIrqTag = uTagSrc = pdmCalcIrqTag(pVM, pDevIns->idTracing);
+    VBOXVMM_PDM_IRQ_HILO(VMMGetCpu(pVM), RT_LOWORD(uTagSrc), RT_HIWORD(uTagSrc));
+
+    PDMIoApicSendMsi(pVM, GCPhys, uValue, uTagSrc);  /* (The API takes the lock recursively.) */
+
+    pdmUnlock(pVM);
+
+    LogFlow(("pdmR3DevHlp_IoApicSendMsi: caller='%s'/%d: returns void\n", pDevIns->pReg->szName, pDevIns->iInstance));
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnDriverAttach} */
+static DECLCALLBACK(int) pdmR3DevHlp_DriverAttach(PPDMDEVINS pDevIns, uint32_t iLun, PPDMIBASE pBaseInterface, PPDMIBASE *ppBaseInterface, const char *pszDesc)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    VM_ASSERT_EMT(pVM);
+    LogFlow(("pdmR3DevHlp_DriverAttach: caller='%s'/%d: iLun=%d pBaseInterface=%p ppBaseInterface=%p pszDesc=%p:{%s}\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, iLun, pBaseInterface, ppBaseInterface, pszDesc, pszDesc));
+
+    /*
+     * Lookup the LUN, it might already be registered.
+     */
+    PPDMLUN pLunPrev = NULL;
+    PPDMLUN pLun = pDevIns->Internal.s.pLunsR3;
+    for (; pLun; pLunPrev = pLun, pLun = pLun->pNext)
+        if (pLun->iLun == iLun)
+            break;
+
+    /*
+     * Create the LUN if if wasn't found, else check if driver is already attached to it.
+     */
+    if (!pLun)
+    {
+        if (    !pBaseInterface
+            ||  !pszDesc
+            ||  !*pszDesc)
+        {
+            Assert(pBaseInterface);
+            Assert(pszDesc || *pszDesc);
+            return VERR_INVALID_PARAMETER;
+        }
+
+        pLun = (PPDMLUN)MMR3HeapAlloc(pVM, MM_TAG_PDM_LUN, sizeof(*pLun));
+        if (!pLun)
+            return VERR_NO_MEMORY;
+
+        pLun->iLun      = iLun;
+        pLun->pNext     = pLunPrev ? pLunPrev->pNext : NULL;
+        pLun->pTop      = NULL;
+        pLun->pBottom   = NULL;
+        pLun->pDevIns   = pDevIns;
+        pLun->pUsbIns   = NULL;
+        pLun->pszDesc   = pszDesc;
+        pLun->pBase     = pBaseInterface;
+        if (!pLunPrev)
+            pDevIns->Internal.s.pLunsR3 = pLun;
+        else
+            pLunPrev->pNext = pLun;
+        Log(("pdmR3DevHlp_DriverAttach: Registered LUN#%d '%s' with device '%s'/%d.\n",
+             iLun, pszDesc, pDevIns->pReg->szName, pDevIns->iInstance));
+    }
+    else if (pLun->pTop)
+    {
+        AssertMsgFailed(("Already attached! The device should keep track of such things!\n"));
+        LogFlow(("pdmR3DevHlp_DriverAttach: caller='%s'/%d: returns %Rrc\n", pDevIns->pReg->szName, pDevIns->iInstance, VERR_PDM_DRIVER_ALREADY_ATTACHED));
+        return VERR_PDM_DRIVER_ALREADY_ATTACHED;
+    }
+    Assert(pLun->pBase == pBaseInterface);
+
+
+    /*
+     * Get the attached driver configuration.
+     */
+    int rc;
+    PCFGMNODE pNode = CFGMR3GetChildF(pDevIns->Internal.s.pCfgHandle, "LUN#%u", iLun);
+    if (pNode)
+        rc = pdmR3DrvInstantiate(pVM, pNode, pBaseInterface, NULL /*pDrvAbove*/, pLun, ppBaseInterface);
+    else
+        rc = VERR_PDM_NO_ATTACHED_DRIVER;
+
+    LogFlow(("pdmR3DevHlp_DriverAttach: caller='%s'/%d: returns %Rrc\n", pDevIns->pReg->szName, pDevIns->iInstance, rc));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnDriverDetach} */
+static DECLCALLBACK(int) pdmR3DevHlp_DriverDetach(PPDMDEVINS pDevIns, PPDMDRVINS pDrvIns, uint32_t fFlags)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns); RT_NOREF_PV(pDevIns);
+    LogFlow(("pdmR3DevHlp_DriverDetach: caller='%s'/%d: pDrvIns=%p\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, pDrvIns));
+
+#ifdef VBOX_STRICT
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    VM_ASSERT_EMT(pVM);
+#endif
+
+    int rc = pdmR3DrvDetach(pDrvIns, fFlags);
+
+    LogFlow(("pdmR3DevHlp_DriverDetach: caller='%s'/%d: returns %Rrc\n", pDevIns->pReg->szName, pDevIns->iInstance, rc));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnDriverReconfigure} */
+static DECLCALLBACK(int) pdmR3DevHlp_DriverReconfigure(PPDMDEVINS pDevIns, uint32_t iLun, uint32_t cDepth,
+                                                       const char * const *papszDrivers, PCFGMNODE *papConfigs, uint32_t fFlags)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    VM_ASSERT_EMT(pVM);
+    LogFlow(("pdmR3DevHlp_DriverReconfigure: caller='%s'/%d: iLun=%u cDepth=%u fFlags=%#x\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, iLun, cDepth, fFlags));
+
+    /*
+     * Validate input.
+     */
+    AssertReturn(cDepth <= 8, VERR_INVALID_PARAMETER);
+    AssertPtrReturn(papszDrivers, VERR_INVALID_POINTER);
+    AssertPtrNullReturn(papConfigs, VERR_INVALID_POINTER);
+    for (uint32_t i = 0; i < cDepth; i++)
+    {
+        AssertPtrReturn(papszDrivers[i], VERR_INVALID_POINTER);
+        size_t cchDriver = strlen(papszDrivers[i]);
+        AssertPtrReturn(cchDriver > 0 && cchDriver < RT_SIZEOFMEMB(PDMDRVREG, szName), VERR_OUT_OF_RANGE);
+
+        if (papConfigs)
+            AssertPtrNullReturn(papConfigs[i], VERR_INVALID_POINTER);
+    }
+    AssertReturn(fFlags == 0, VERR_INVALID_FLAGS);
+
+    /*
+     * Do we have to detach an existing driver first?
+     */
+    for (PPDMLUN pLun = pDevIns->Internal.s.pLunsR3; pLun; pLun = pLun->pNext)
+        if (pLun->iLun == iLun)
+        {
+            if (pLun->pTop)
+            {
+                int rc = pdmR3DrvDetach(pLun->pTop, 0);
+                AssertRCReturn(rc, rc);
+            }
+            break;
+        }
+
+    /*
+     * Remove the old tree.
+     */
+    PCFGMNODE pCfgDev = CFGMR3GetChildF(CFGMR3GetRoot(pVM), "Devices/%s/%u/", pDevIns->pReg->szName, pDevIns->iInstance);
+    AssertReturn(pCfgDev, VERR_INTERNAL_ERROR_2);
+    PCFGMNODE pCfgLun = CFGMR3GetChildF(pCfgDev, "LUN#%u", iLun);
+    if (pCfgLun)
+        CFGMR3RemoveNode(pCfgLun);
+
+    /*
+     * Construct a new tree.
+     */
+    int rc = CFGMR3InsertNodeF(pCfgDev, &pCfgLun, "LUN#%u", iLun);
+    AssertRCReturn(rc, rc);
+    PCFGMNODE pCfgDrv = pCfgLun;
+    for (uint32_t i = 0; i < cDepth; i++)
+    {
+        rc = CFGMR3InsertString(pCfgDrv, "Driver", papszDrivers[i]);
+        AssertRCReturn(rc, rc);
+        if (papConfigs && papConfigs[i])
+        {
+            rc = CFGMR3InsertSubTree(pCfgDrv, "Config", papConfigs[i], NULL);
+            AssertRCReturn(rc, rc);
+            papConfigs[i] = NULL;
+        }
+        else
+        {
+            rc = CFGMR3InsertNode(pCfgDrv, "Config", NULL);
+            AssertRCReturn(rc, rc);
+        }
+
+        if (i + 1 >= cDepth)
+            break;
+        rc = CFGMR3InsertNode(pCfgDrv, "AttachedDriver", &pCfgDrv);
+        AssertRCReturn(rc, rc);
+    }
+
+    LogFlow(("pdmR3DevHlp_DriverReconfigure: caller='%s'/%d: returns %Rrc\n", pDevIns->pReg->szName, pDevIns->iInstance, rc));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnQueueCreatePtr} */
+static DECLCALLBACK(int) pdmR3DevHlp_QueueCreatePtr(PPDMDEVINS pDevIns, size_t cbItem, uint32_t cItems, uint32_t cMilliesInterval,
+                                                    PFNPDMQUEUEDEV pfnCallback, bool fRZEnabled, const char *pszName, PPDMQUEUE *ppQueue)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    LogFlow(("pdmR3DevHlp_QueueCreatePtr: caller='%s'/%d: cbItem=%#x cItems=%#x cMilliesInterval=%u pfnCallback=%p fRZEnabled=%RTbool pszName=%p:{%s} ppQueue=%p\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, cbItem, cItems, cMilliesInterval, pfnCallback, fRZEnabled, pszName, pszName, ppQueue));
+
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    VM_ASSERT_EMT(pVM);
+
+    if (pDevIns->iInstance > 0)
+    {
+        pszName = MMR3HeapAPrintf(pVM, MM_TAG_PDM_DEVICE_DESC, "%s_%u", pszName, pDevIns->iInstance);
+        AssertLogRelReturn(pszName, VERR_NO_MEMORY);
+    }
+
+    int rc = PDMR3QueueCreateDevice(pVM, pDevIns, cbItem, cItems, cMilliesInterval, pfnCallback, fRZEnabled, pszName, ppQueue);
+
+    LogFlow(("pdmR3DevHlp_QueueCreatePtr: caller='%s'/%d: returns %Rrc *ppQueue=%p\n", pDevIns->pReg->szName, pDevIns->iInstance, rc, *ppQueue));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnQueueCreate} */
+static DECLCALLBACK(int) pdmR3DevHlp_QueueCreate(PPDMDEVINS pDevIns, size_t cbItem, uint32_t cItems, uint32_t cMilliesInterval,
+                                                 PFNPDMQUEUEDEV pfnCallback, bool fRZEnabled, const char *pszName,
+                                                 PDMQUEUEHANDLE *phQueue)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    LogFlow(("pdmR3DevHlp_QueueCreate: caller='%s'/%d: cbItem=%#x cItems=%#x cMilliesInterval=%u pfnCallback=%p fRZEnabled=%RTbool pszName=%p:{%s} phQueue=%p\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, cbItem, cItems, cMilliesInterval, pfnCallback, fRZEnabled, pszName, pszName, phQueue));
+
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    VM_ASSERT_EMT(pVM);
+
+    if (pDevIns->iInstance > 0)
+    {
+        pszName = MMR3HeapAPrintf(pVM, MM_TAG_PDM_DEVICE_DESC, "%s_%u", pszName, pDevIns->iInstance);
+        AssertLogRelReturn(pszName, VERR_NO_MEMORY);
+    }
+
+    PPDMQUEUE pQueue = NULL;
+    int rc = PDMR3QueueCreateDevice(pVM, pDevIns, cbItem, cItems, cMilliesInterval, pfnCallback, fRZEnabled, pszName, &pQueue);
+    *phQueue = (uintptr_t)pQueue;
+
+    LogFlow(("pdmR3DevHlp_QueueCreate: caller='%s'/%d: returns %Rrc *ppQueue=%p\n", pDevIns->pReg->szName, pDevIns->iInstance, rc, *phQueue));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnQueueToPtr} */
+static DECLCALLBACK(PPDMQUEUE)  pdmR3DevHlp_QueueToPtr(PPDMDEVINS pDevIns, PDMQUEUEHANDLE hQueue)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    RT_NOREF(pDevIns);
+    return (PPDMQUEUE)hQueue;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnQueueAlloc} */
+static DECLCALLBACK(PPDMQUEUEITEMCORE) pdmR3DevHlp_QueueAlloc(PPDMDEVINS pDevIns, PDMQUEUEHANDLE hQueue)
+{
+    return PDMQueueAlloc(pdmR3DevHlp_QueueToPtr(pDevIns, hQueue));
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnQueueInsert} */
+static DECLCALLBACK(void) pdmR3DevHlp_QueueInsert(PPDMDEVINS pDevIns, PDMQUEUEHANDLE hQueue, PPDMQUEUEITEMCORE pItem)
+{
+    return PDMQueueInsert(pdmR3DevHlp_QueueToPtr(pDevIns, hQueue), pItem);
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnQueueInsertEx} */
+static DECLCALLBACK(void) pdmR3DevHlp_QueueInsertEx(PPDMDEVINS pDevIns, PDMQUEUEHANDLE hQueue, PPDMQUEUEITEMCORE pItem,
+                                                    uint64_t cNanoMaxDelay)
+{
+    return PDMQueueInsertEx(pdmR3DevHlp_QueueToPtr(pDevIns, hQueue), pItem, cNanoMaxDelay);
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnQueueFlushIfNecessary} */
+static DECLCALLBACK(bool) pdmR3DevHlp_QueueFlushIfNecessary(PPDMDEVINS pDevIns, PDMQUEUEHANDLE hQueue)
+{
+    return PDMQueueFlushIfNecessary(pdmR3DevHlp_QueueToPtr(pDevIns, hQueue));
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnTaskCreate} */
+static DECLCALLBACK(int) pdmR3DevHlp_TaskCreate(PPDMDEVINS pDevIns, uint32_t fFlags, const char *pszName,
+                                                PFNPDMTASKDEV pfnCallback, void *pvUser, PDMTASKHANDLE *phTask)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    LogFlow(("pdmR3DevHlp_TaskTrigger: caller='%s'/%d: pfnCallback=%p fFlags=%#x pszName=%p:{%s} phTask=%p\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, pfnCallback, fFlags, pszName, pszName, phTask));
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    VM_ASSERT_EMT(pVM);
+
+    int rc = PDMR3TaskCreate(pVM, fFlags, pszName, PDMTASKTYPE_DEV, pDevIns, (PFNRT)pfnCallback, pvUser, phTask);
+
+    LogFlow(("pdmR3DevHlp_TaskTrigger: caller='%s'/%d: returns %Rrc\n", pDevIns->pReg->szName, pDevIns->iInstance, rc));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnTaskTrigger} */
+static DECLCALLBACK(int) pdmR3DevHlp_TaskTrigger(PPDMDEVINS pDevIns, PDMTASKHANDLE hTask)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    LogFlow(("pdmR3DevHlp_TaskTrigger: caller='%s'/%d: hTask=%RU64\n", pDevIns->pReg->szName, pDevIns->iInstance, hTask));
+
+    int rc = PDMTaskTrigger(pDevIns->Internal.s.pVMR3, PDMTASKTYPE_DEV, pDevIns, hTask);
+
+    LogFlow(("pdmR3DevHlp_TaskTrigger: caller='%s'/%d: returns %Rrc\n", pDevIns->pReg->szName, pDevIns->iInstance, rc));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnSUPSemEventCreate} */
+static DECLCALLBACK(int) pdmR3DevHlp_SUPSemEventCreate(PPDMDEVINS pDevIns, PSUPSEMEVENT phEvent)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    LogFlow(("pdmR3DevHlp_SUPSemEventCreate: caller='%s'/%d: phEvent=%p\n", pDevIns->pReg->szName, pDevIns->iInstance, phEvent));
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    VM_ASSERT_EMT(pVM);
+
+    int rc = SUPSemEventCreate(pVM->pSession, phEvent);
+
+    LogFlow(("pdmR3DevHlp_SUPSemEventCreate: caller='%s'/%d: returns %Rrc *phEvent=%p\n", pDevIns->pReg->szName, pDevIns->iInstance, rc, *phEvent));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnSUPSemEventClose} */
+static DECLCALLBACK(int) pdmR3DevHlp_SUPSemEventClose(PPDMDEVINS pDevIns, SUPSEMEVENT hEvent)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    LogFlow(("pdmR3DevHlp_SUPSemEventClose: caller='%s'/%d: hEvent=%p\n", pDevIns->pReg->szName, pDevIns->iInstance, hEvent));
+
+    int rc = SUPSemEventClose(pDevIns->Internal.s.pVMR3->pSession, hEvent);
+
+    LogFlow(("pdmR3DevHlp_SUPSemEventClose: caller='%s'/%d: returns %Rrc\n", pDevIns->pReg->szName, pDevIns->iInstance, rc));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnSUPSemEventSignal} */
+static DECLCALLBACK(int) pdmR3DevHlp_SUPSemEventSignal(PPDMDEVINS pDevIns, SUPSEMEVENT hEvent)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    LogFlow(("pdmR3DevHlp_SUPSemEventSignal: caller='%s'/%d: hEvent=%p\n", pDevIns->pReg->szName, pDevIns->iInstance, hEvent));
+
+    int rc = SUPSemEventSignal(pDevIns->Internal.s.pVMR3->pSession, hEvent);
+
+    LogFlow(("pdmR3DevHlp_SUPSemEventSignal: caller='%s'/%d: returns %Rrc\n", pDevIns->pReg->szName, pDevIns->iInstance, rc));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnSUPSemEventWaitNoResume} */
+static DECLCALLBACK(int) pdmR3DevHlp_SUPSemEventWaitNoResume(PPDMDEVINS pDevIns, SUPSEMEVENT hEvent, uint32_t cMillies)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    LogFlow(("pdmR3DevHlp_SUPSemEventWaitNoResume: caller='%s'/%d: hEvent=%p cNsTimeout=%RU32\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, hEvent, cMillies));
+
+    int rc = SUPSemEventWaitNoResume(pDevIns->Internal.s.pVMR3->pSession, hEvent, cMillies);
+
+    LogFlow(("pdmR3DevHlp_SUPSemEventWaitNoResume: caller='%s'/%d: returns %Rrc\n", pDevIns->pReg->szName, pDevIns->iInstance, rc));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnSUPSemEventWaitNsAbsIntr} */
+static DECLCALLBACK(int) pdmR3DevHlp_SUPSemEventWaitNsAbsIntr(PPDMDEVINS pDevIns, SUPSEMEVENT hEvent, uint64_t uNsTimeout)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    LogFlow(("pdmR3DevHlp_SUPSemEventWaitNsAbsIntr: caller='%s'/%d: hEvent=%p uNsTimeout=%RU64\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, hEvent, uNsTimeout));
+
+    int rc = SUPSemEventWaitNsAbsIntr(pDevIns->Internal.s.pVMR3->pSession, hEvent, uNsTimeout);
+
+    LogFlow(("pdmR3DevHlp_SUPSemEventWaitNsAbsIntr: caller='%s'/%d: returns %Rrc\n", pDevIns->pReg->szName, pDevIns->iInstance, rc));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnSUPSemEventWaitNsRelIntr} */
+static DECLCALLBACK(int) pdmR3DevHlp_SUPSemEventWaitNsRelIntr(PPDMDEVINS pDevIns, SUPSEMEVENT hEvent, uint64_t cNsTimeout)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    LogFlow(("pdmR3DevHlp_SUPSemEventWaitNsRelIntr: caller='%s'/%d: hEvent=%p cNsTimeout=%RU64\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, hEvent, cNsTimeout));
+
+    int rc = SUPSemEventWaitNsRelIntr(pDevIns->Internal.s.pVMR3->pSession, hEvent, cNsTimeout);
+
+    LogFlow(("pdmR3DevHlp_SUPSemEventWaitNsRelIntr: caller='%s'/%d: returns %Rrc\n", pDevIns->pReg->szName, pDevIns->iInstance, rc));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnSUPSemEventGetResolution} */
+static DECLCALLBACK(uint32_t) pdmR3DevHlp_SUPSemEventGetResolution(PPDMDEVINS pDevIns)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    LogFlow(("pdmR3DevHlp_SUPSemEventGetResolution: caller='%s'/%d:\n", pDevIns->pReg->szName, pDevIns->iInstance));
+
+    uint32_t cNsResolution = SUPSemEventGetResolution(pDevIns->Internal.s.pVMR3->pSession);
+
+    LogFlow(("pdmR3DevHlp_SUPSemEventGetResolution: caller='%s'/%d: returns %u\n", pDevIns->pReg->szName, pDevIns->iInstance, cNsResolution));
+    return cNsResolution;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnSUPSemEventMultiCreate} */
+static DECLCALLBACK(int) pdmR3DevHlp_SUPSemEventMultiCreate(PPDMDEVINS pDevIns, PSUPSEMEVENTMULTI phEventMulti)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    LogFlow(("pdmR3DevHlp_SUPSemEventMultiCreate: caller='%s'/%d: phEventMulti=%p\n", pDevIns->pReg->szName, pDevIns->iInstance, phEventMulti));
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    VM_ASSERT_EMT(pVM);
+
+    int rc = SUPSemEventMultiCreate(pVM->pSession, phEventMulti);
+
+    LogFlow(("pdmR3DevHlp_SUPSemEventMultiCreate: caller='%s'/%d: returns %Rrc *phEventMulti=%p\n", pDevIns->pReg->szName, pDevIns->iInstance, rc, *phEventMulti));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnSUPSemEventMultiClose} */
+static DECLCALLBACK(int) pdmR3DevHlp_SUPSemEventMultiClose(PPDMDEVINS pDevIns, SUPSEMEVENTMULTI hEventMulti)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    LogFlow(("pdmR3DevHlp_SUPSemEventMultiClose: caller='%s'/%d: hEventMulti=%p\n", pDevIns->pReg->szName, pDevIns->iInstance, hEventMulti));
+
+    int rc = SUPSemEventMultiClose(pDevIns->Internal.s.pVMR3->pSession, hEventMulti);
+
+    LogFlow(("pdmR3DevHlp_SUPSemEventMultiClose: caller='%s'/%d: returns %Rrc\n", pDevIns->pReg->szName, pDevIns->iInstance, rc));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnSUPSemEventMultiSignal} */
+static DECLCALLBACK(int) pdmR3DevHlp_SUPSemEventMultiSignal(PPDMDEVINS pDevIns, SUPSEMEVENTMULTI hEventMulti)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    LogFlow(("pdmR3DevHlp_SUPSemEventMultiSignal: caller='%s'/%d: hEventMulti=%p\n", pDevIns->pReg->szName, pDevIns->iInstance, hEventMulti));
+
+    int rc = SUPSemEventMultiSignal(pDevIns->Internal.s.pVMR3->pSession, hEventMulti);
+
+    LogFlow(("pdmR3DevHlp_SUPSemEventMultiSignal: caller='%s'/%d: returns %Rrc\n", pDevIns->pReg->szName, pDevIns->iInstance, rc));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnSUPSemEventMultiReset} */
+static DECLCALLBACK(int) pdmR3DevHlp_SUPSemEventMultiReset(PPDMDEVINS pDevIns, SUPSEMEVENTMULTI hEventMulti)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    LogFlow(("pdmR3DevHlp_SUPSemEventMultiReset: caller='%s'/%d: hEventMulti=%p\n", pDevIns->pReg->szName, pDevIns->iInstance, hEventMulti));
+
+    int rc = SUPSemEventMultiReset(pDevIns->Internal.s.pVMR3->pSession, hEventMulti);
+
+    LogFlow(("pdmR3DevHlp_SUPSemEventMultiReset: caller='%s'/%d: returns %Rrc\n", pDevIns->pReg->szName, pDevIns->iInstance, rc));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnSUPSemEventMultiWaitNoResume} */
+static DECLCALLBACK(int) pdmR3DevHlp_SUPSemEventMultiWaitNoResume(PPDMDEVINS pDevIns, SUPSEMEVENTMULTI hEventMulti,
+                                                                  uint32_t cMillies)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    LogFlow(("pdmR3DevHlp_SUPSemEventMultiWaitNoResume: caller='%s'/%d: hEventMulti=%p cMillies=%RU32\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, hEventMulti, cMillies));
+
+    int rc = SUPSemEventMultiWaitNoResume(pDevIns->Internal.s.pVMR3->pSession, hEventMulti, cMillies);
+
+    LogFlow(("pdmR3DevHlp_SUPSemEventMultiWaitNoResume: caller='%s'/%d: returns %Rrc\n", pDevIns->pReg->szName, pDevIns->iInstance, rc));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnSUPSemEventMultiWaitNsAbsIntr} */
+static DECLCALLBACK(int) pdmR3DevHlp_SUPSemEventMultiWaitNsAbsIntr(PPDMDEVINS pDevIns, SUPSEMEVENTMULTI hEventMulti,
+                                                                   uint64_t uNsTimeout)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    LogFlow(("pdmR3DevHlp_SUPSemEventMultiWaitNsAbsIntr: caller='%s'/%d: hEventMulti=%p uNsTimeout=%RU64\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, hEventMulti, uNsTimeout));
+
+    int rc = SUPSemEventMultiWaitNsAbsIntr(pDevIns->Internal.s.pVMR3->pSession, hEventMulti, uNsTimeout);
+
+    LogFlow(("pdmR3DevHlp_SUPSemEventMultiWaitNsAbsIntr: caller='%s'/%d: returns %Rrc\n", pDevIns->pReg->szName, pDevIns->iInstance, rc));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnSUPSemEventMultiWaitNsRelIntr} */
+static DECLCALLBACK(int) pdmR3DevHlp_SUPSemEventMultiWaitNsRelIntr(PPDMDEVINS pDevIns, SUPSEMEVENTMULTI hEventMulti,
+                                                                   uint64_t cNsTimeout)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    LogFlow(("pdmR3DevHlp_SUPSemEventMultiWaitNsRelIntr: caller='%s'/%d: hEventMulti=%p cNsTimeout=%RU64\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, hEventMulti, cNsTimeout));
+
+    int rc = SUPSemEventMultiWaitNsRelIntr(pDevIns->Internal.s.pVMR3->pSession, hEventMulti, cNsTimeout);
+
+    LogFlow(("pdmR3DevHlp_SUPSemEventMultiWaitNsRelIntr: caller='%s'/%d: returns %Rrc\n", pDevIns->pReg->szName, pDevIns->iInstance, rc));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnSUPSemEventMultiGetResolution} */
+static DECLCALLBACK(uint32_t) pdmR3DevHlp_SUPSemEventMultiGetResolution(PPDMDEVINS pDevIns)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    LogFlow(("pdmR3DevHlp_SUPSemEventMultiGetResolution: caller='%s'/%d:\n", pDevIns->pReg->szName, pDevIns->iInstance));
+
+    uint32_t cNsResolution = SUPSemEventMultiGetResolution(pDevIns->Internal.s.pVMR3->pSession);
+
+    LogFlow(("pdmR3DevHlp_SUPSemEventMultiGetResolution: caller='%s'/%d: returns %u\n", pDevIns->pReg->szName, pDevIns->iInstance, cNsResolution));
+    return cNsResolution;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnCritSectInit} */
+static DECLCALLBACK(int) pdmR3DevHlp_CritSectInit(PPDMDEVINS pDevIns, PPDMCRITSECT pCritSect, RT_SRC_POS_DECL,
+                                                  const char *pszNameFmt, va_list va)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    LogFlow(("pdmR3DevHlp_CritSectInit: caller='%s'/%d: pCritSect=%p pszNameFmt=%p:{%s}\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, pCritSect, pszNameFmt, pszNameFmt));
+
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    VM_ASSERT_EMT(pVM);
+    int rc = pdmR3CritSectInitDevice(pVM, pDevIns, pCritSect, RT_SRC_POS_ARGS, pszNameFmt, va);
+
+    LogFlow(("pdmR3DevHlp_CritSectInit: caller='%s'/%d: returns %Rrc\n", pDevIns->pReg->szName, pDevIns->iInstance, rc));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnCritSectGetNop} */
+static DECLCALLBACK(PPDMCRITSECT) pdmR3DevHlp_CritSectGetNop(PPDMDEVINS pDevIns)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    VM_ASSERT_EMT(pVM);
+
+    PPDMCRITSECT pCritSect = PDMR3CritSectGetNop(pVM);
+    LogFlow(("pdmR3DevHlp_CritSectGetNop: caller='%s'/%d: return %p\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, pCritSect));
+    return pCritSect;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnCritSectGetNopR0} */
+static DECLCALLBACK(R0PTRTYPE(PPDMCRITSECT)) pdmR3DevHlp_CritSectGetNopR0(PPDMDEVINS pDevIns)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    VM_ASSERT_EMT(pVM);
+
+    R0PTRTYPE(PPDMCRITSECT) pCritSect = PDMR3CritSectGetNopR0(pVM);
+    LogFlow(("pdmR3DevHlp_CritSectGetNopR0: caller='%s'/%d: return %RHv\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, pCritSect));
+    return pCritSect;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnCritSectGetNopRC} */
+static DECLCALLBACK(RCPTRTYPE(PPDMCRITSECT)) pdmR3DevHlp_CritSectGetNopRC(PPDMDEVINS pDevIns)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    VM_ASSERT_EMT(pVM);
+
+    RCPTRTYPE(PPDMCRITSECT) pCritSect = PDMR3CritSectGetNopRC(pVM);
+    LogFlow(("pdmR3DevHlp_CritSectGetNopRC: caller='%s'/%d: return %RRv\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, pCritSect));
+    return pCritSect;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnSetDeviceCritSect} */
+static DECLCALLBACK(int) pdmR3DevHlp_SetDeviceCritSect(PPDMDEVINS pDevIns, PPDMCRITSECT pCritSect)
+{
+    /*
+     * Validate input.
+     *
+     * Note! We only allow the automatically created default critical section
+     *       to be replaced by this API.
+     */
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    AssertPtrReturn(pCritSect, VERR_INVALID_POINTER);
+    LogFlow(("pdmR3DevHlp_SetDeviceCritSect: caller='%s'/%d: pCritSect=%p (%s)\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, pCritSect, pCritSect->s.pszName));
+    AssertReturn(PDMCritSectIsInitialized(pCritSect), VERR_INVALID_PARAMETER);
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    AssertReturn(pCritSect->s.pVMR3 == pVM, VERR_INVALID_PARAMETER);
+
+    VM_ASSERT_EMT(pVM);
+    VM_ASSERT_STATE_RETURN(pVM, VMSTATE_CREATING, VERR_WRONG_ORDER);
+
+    AssertReturn(pDevIns->pCritSectRoR3, VERR_PDM_DEV_IPE_1);
+    AssertReturn(pDevIns->pCritSectRoR3->s.fAutomaticDefaultCritsect, VERR_WRONG_ORDER);
+    AssertReturn(!pDevIns->pCritSectRoR3->s.fUsedByTimerOrSimilar, VERR_WRONG_ORDER);
+    AssertReturn(pDevIns->pCritSectRoR3 != pCritSect, VERR_INVALID_PARAMETER);
+
+    /*
+     * Replace the critical section and destroy the automatic default section.
+     */
+    PPDMCRITSECT pOldCritSect = pDevIns->pCritSectRoR3;
+    pDevIns->pCritSectRoR3 = pCritSect;
+    pDevIns->Internal.s.fIntFlags |= PDMDEVINSINT_FLAGS_CHANGED_CRITSECT;
+
+    Assert(RT_BOOL(pDevIns->Internal.s.fIntFlags & PDMDEVINSINT_FLAGS_R0_ENABLED) == pDevIns->fR0Enabled);
+    if (   (pDevIns->Internal.s.fIntFlags & PDMDEVINSINT_FLAGS_R0_ENABLED)
+        && !(pDevIns->Internal.s.pDevR3->pReg->fFlags & PDM_DEVREG_FLAGS_NEW_STYLE))
+    {
+        PDMDEVICECOMPATSETCRITSECTREQ Req;
+        Req.Hdr.u32Magic = SUPVMMR0REQHDR_MAGIC;
+        Req.Hdr.cbReq    = sizeof(Req);
+        Req.idxR0Device  = pDevIns->Internal.s.idxR0Device;
+        Req.pDevInsR3    = pDevIns;
+        Req.pCritSectR3  = pCritSect;
+        int rc = VMMR3CallR0(pVM, VMMR0_DO_PDM_DEVICE_COMPAT_SET_CRITSECT, 0, &Req.Hdr);
+        AssertLogRelRCReturn(rc, rc);
+    }
+
+    PDMR3CritSectDelete(pOldCritSect);
+    Assert((uintptr_t)pOldCritSect - (uintptr_t)pDevIns < pDevIns->cbRing3);
+
+    LogFlow(("pdmR3DevHlp_SetDeviceCritSect: caller='%s'/%d: returns %Rrc\n", pDevIns->pReg->szName, pDevIns->iInstance, VINF_SUCCESS));
+    return VINF_SUCCESS;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnCritSectYield} */
+static DECLCALLBACK(bool)     pdmR3DevHlp_CritSectYield(PPDMDEVINS pDevIns, PPDMCRITSECT pCritSect)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    return PDMR3CritSectYield(pDevIns->Internal.s.pVMR3, pCritSect);
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnCritSectEnter} */
+static DECLCALLBACK(int)      pdmR3DevHlp_CritSectEnter(PPDMDEVINS pDevIns, PPDMCRITSECT pCritSect, int rcBusy)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    RT_NOREF(pDevIns); /** @todo pass pDevIns->Internal.s.pVMR3 to the crit sect code.   */
+    return PDMCritSectEnter(pCritSect, rcBusy);
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnCritSectEnterDebug} */
+static DECLCALLBACK(int)      pdmR3DevHlp_CritSectEnterDebug(PPDMDEVINS pDevIns, PPDMCRITSECT pCritSect, int rcBusy, RTHCUINTPTR uId, RT_SRC_POS_DECL)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    RT_NOREF(pDevIns); /** @todo pass pDevIns->Internal.s.pVMR3 to the crit sect code.   */
+    return PDMCritSectEnterDebug(pCritSect, rcBusy, uId, RT_SRC_POS_ARGS);
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnCritSectTryEnter} */
+static DECLCALLBACK(int)      pdmR3DevHlp_CritSectTryEnter(PPDMDEVINS pDevIns, PPDMCRITSECT pCritSect)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    RT_NOREF(pDevIns); /** @todo pass pDevIns->Internal.s.pVMR3 to the crit sect code.   */
+    return PDMCritSectTryEnter(pCritSect);
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnCritSectTryEnterDebug} */
+static DECLCALLBACK(int)      pdmR3DevHlp_CritSectTryEnterDebug(PPDMDEVINS pDevIns, PPDMCRITSECT pCritSect, RTHCUINTPTR uId, RT_SRC_POS_DECL)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    RT_NOREF(pDevIns); /** @todo pass pDevIns->Internal.s.pVMR3 to the crit sect code.   */
+    return PDMCritSectTryEnterDebug(pCritSect, uId, RT_SRC_POS_ARGS);
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnCritSectLeave} */
+static DECLCALLBACK(int)      pdmR3DevHlp_CritSectLeave(PPDMDEVINS pDevIns, PPDMCRITSECT pCritSect)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    RT_NOREF(pDevIns); /** @todo pass pDevIns->Internal.s.pVMR3 to the crit sect code.   */
+    return PDMCritSectLeave(pCritSect);
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnCritSectIsOwner} */
+static DECLCALLBACK(bool)     pdmR3DevHlp_CritSectIsOwner(PPDMDEVINS pDevIns, PCPDMCRITSECT pCritSect)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    RT_NOREF(pDevIns); /** @todo pass pDevIns->Internal.s.pVMR3 to the crit sect code.   */
+    return PDMCritSectIsOwner(pCritSect);
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnCritSectIsInitialized} */
+static DECLCALLBACK(bool)     pdmR3DevHlp_CritSectIsInitialized(PPDMDEVINS pDevIns, PCPDMCRITSECT pCritSect)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    RT_NOREF(pDevIns);
+    return PDMCritSectIsInitialized(pCritSect);
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnCritSectHasWaiters} */
+static DECLCALLBACK(bool)     pdmR3DevHlp_CritSectHasWaiters(PPDMDEVINS pDevIns, PCPDMCRITSECT pCritSect)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    RT_NOREF(pDevIns);
+    return PDMCritSectHasWaiters(pCritSect);
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnCritSectGetRecursion} */
+static DECLCALLBACK(uint32_t) pdmR3DevHlp_CritSectGetRecursion(PPDMDEVINS pDevIns, PCPDMCRITSECT pCritSect)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    RT_NOREF(pDevIns);
+    return PDMCritSectGetRecursion(pCritSect);
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnCritSectScheduleExitEvent} */
+static DECLCALLBACK(int) pdmR3DevHlp_CritSectScheduleExitEvent(PPDMDEVINS pDevIns, PPDMCRITSECT pCritSect,
+                                                               SUPSEMEVENT hEventToSignal)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    RT_NOREF(pDevIns);
+    return PDMHCCritSectScheduleExitEvent(pCritSect, hEventToSignal);
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnCritSectDelete} */
+static DECLCALLBACK(int) pdmR3DevHlp_CritSectDelete(PPDMDEVINS pDevIns, PPDMCRITSECT pCritSect)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    RT_NOREF(pDevIns);
+    return PDMR3CritSectDelete(pCritSect);
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnThreadCreate} */
+static DECLCALLBACK(int) pdmR3DevHlp_ThreadCreate(PPDMDEVINS pDevIns, PPPDMTHREAD ppThread, void *pvUser, PFNPDMTHREADDEV pfnThread,
+                                                  PFNPDMTHREADWAKEUPDEV pfnWakeup, size_t cbStack, RTTHREADTYPE enmType, const char *pszName)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    VM_ASSERT_EMT(pDevIns->Internal.s.pVMR3);
+    LogFlow(("pdmR3DevHlp_ThreadCreate: caller='%s'/%d: ppThread=%p pvUser=%p pfnThread=%p pfnWakeup=%p cbStack=%#zx enmType=%d pszName=%p:{%s}\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, ppThread, pvUser, pfnThread, pfnWakeup, cbStack, enmType, pszName, pszName));
+
+    int rc = pdmR3ThreadCreateDevice(pDevIns->Internal.s.pVMR3, pDevIns, ppThread, pvUser, pfnThread, pfnWakeup, cbStack, enmType, pszName);
+
+    LogFlow(("pdmR3DevHlp_ThreadCreate: caller='%s'/%d: returns %Rrc *ppThread=%RTthrd\n", pDevIns->pReg->szName, pDevIns->iInstance,
+            rc, *ppThread));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnSetAsyncNotification} */
+static DECLCALLBACK(int) pdmR3DevHlp_SetAsyncNotification(PPDMDEVINS pDevIns, PFNPDMDEVASYNCNOTIFY pfnAsyncNotify)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    VM_ASSERT_EMT0(pDevIns->Internal.s.pVMR3);
+    LogFlow(("pdmR3DevHlp_SetAsyncNotification: caller='%s'/%d: pfnAsyncNotify=%p\n", pDevIns->pReg->szName, pDevIns->iInstance, pfnAsyncNotify));
+
+    int rc = VINF_SUCCESS;
+    AssertStmt(pfnAsyncNotify, rc = VERR_INVALID_PARAMETER);
+    AssertStmt(!pDevIns->Internal.s.pfnAsyncNotify, rc = VERR_WRONG_ORDER);
+    AssertStmt(pDevIns->Internal.s.fIntFlags & (PDMDEVINSINT_FLAGS_SUSPENDED | PDMDEVINSINT_FLAGS_RESET), rc = VERR_WRONG_ORDER);
+    VMSTATE enmVMState = VMR3GetState(pDevIns->Internal.s.pVMR3);
+    AssertStmt(   enmVMState == VMSTATE_SUSPENDING
+               || enmVMState == VMSTATE_SUSPENDING_EXT_LS
+               || enmVMState == VMSTATE_SUSPENDING_LS
+               || enmVMState == VMSTATE_RESETTING
+               || enmVMState == VMSTATE_RESETTING_LS
+               || enmVMState == VMSTATE_POWERING_OFF
+               || enmVMState == VMSTATE_POWERING_OFF_LS,
+               rc = VERR_INVALID_STATE);
+
+    if (RT_SUCCESS(rc))
+        pDevIns->Internal.s.pfnAsyncNotify = pfnAsyncNotify;
+
+    LogFlow(("pdmR3DevHlp_SetAsyncNotification: caller='%s'/%d: returns %Rrc\n", pDevIns->pReg->szName, pDevIns->iInstance, rc));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnAsyncNotificationCompleted} */
+static DECLCALLBACK(void) pdmR3DevHlp_AsyncNotificationCompleted(PPDMDEVINS pDevIns)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+
+    VMSTATE enmVMState = VMR3GetState(pVM);
+    if (   enmVMState == VMSTATE_SUSPENDING
+        || enmVMState == VMSTATE_SUSPENDING_EXT_LS
+        || enmVMState == VMSTATE_SUSPENDING_LS
+        || enmVMState == VMSTATE_RESETTING
+        || enmVMState == VMSTATE_RESETTING_LS
+        || enmVMState == VMSTATE_POWERING_OFF
+        || enmVMState == VMSTATE_POWERING_OFF_LS)
+    {
+        LogFlow(("pdmR3DevHlp_AsyncNotificationCompleted: caller='%s'/%d:\n", pDevIns->pReg->szName, pDevIns->iInstance));
+        VMR3AsyncPdmNotificationWakeupU(pVM->pUVM);
+    }
+    else
+        LogFlow(("pdmR3DevHlp_AsyncNotificationCompleted: caller='%s'/%d: enmVMState=%d\n", pDevIns->pReg->szName, pDevIns->iInstance, enmVMState));
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnRTCRegister} */
+static DECLCALLBACK(int) pdmR3DevHlp_RTCRegister(PPDMDEVINS pDevIns, PCPDMRTCREG pRtcReg, PCPDMRTCHLP *ppRtcHlp)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    VM_ASSERT_EMT(pDevIns->Internal.s.pVMR3);
+    LogFlow(("pdmR3DevHlp_RTCRegister: caller='%s'/%d: pRtcReg=%p:{.u32Version=%#x, .pfnWrite=%p, .pfnRead=%p} ppRtcHlp=%p\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, pRtcReg, pRtcReg->u32Version, pRtcReg->pfnWrite,
+             pRtcReg->pfnWrite, ppRtcHlp));
+
+    /*
+     * Validate input.
+     */
+    if (pRtcReg->u32Version != PDM_RTCREG_VERSION)
+    {
+        AssertMsgFailed(("u32Version=%#x expected %#x\n", pRtcReg->u32Version,
+                         PDM_RTCREG_VERSION));
+        LogFlow(("pdmR3DevHlp_RTCRegister: caller='%s'/%d: returns %Rrc (version)\n",
+                 pDevIns->pReg->szName, pDevIns->iInstance, VERR_INVALID_PARAMETER));
+        return VERR_INVALID_PARAMETER;
+    }
+    if (    !pRtcReg->pfnWrite
+        ||  !pRtcReg->pfnRead)
+    {
+        Assert(pRtcReg->pfnWrite);
+        Assert(pRtcReg->pfnRead);
+        LogFlow(("pdmR3DevHlp_RTCRegister: caller='%s'/%d: returns %Rrc (callbacks)\n",
+                 pDevIns->pReg->szName, pDevIns->iInstance, VERR_INVALID_PARAMETER));
+        return VERR_INVALID_PARAMETER;
+    }
+
+    if (!ppRtcHlp)
+    {
+        Assert(ppRtcHlp);
+        LogFlow(("pdmR3DevHlp_RTCRegister: caller='%s'/%d: returns %Rrc (ppRtcHlp)\n",
+                 pDevIns->pReg->szName, pDevIns->iInstance, VERR_INVALID_PARAMETER));
+        return VERR_INVALID_PARAMETER;
+    }
+
+    /*
+     * Only one DMA device.
+     */
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    if (pVM->pdm.s.pRtc)
+    {
+        AssertMsgFailed(("Only one RTC device is supported!\n"));
+        LogFlow(("pdmR3DevHlp_RTCRegister: caller='%s'/%d: returns %Rrc\n",
+                 pDevIns->pReg->szName, pDevIns->iInstance, VERR_INVALID_PARAMETER));
+        return VERR_INVALID_PARAMETER;
+    }
+
+    /*
+     * Allocate and initialize pci bus structure.
+     */
+    int rc = VINF_SUCCESS;
+    PPDMRTC pRtc = (PPDMRTC)MMR3HeapAlloc(pDevIns->Internal.s.pVMR3, MM_TAG_PDM_DEVICE, sizeof(*pRtc));
+    if (pRtc)
+    {
+        pRtc->pDevIns   = pDevIns;
+        pRtc->Reg       = *pRtcReg;
+        pVM->pdm.s.pRtc = pRtc;
+
+        /* set the helper pointer. */
+        *ppRtcHlp = &g_pdmR3DevRtcHlp;
+        Log(("PDM: Registered RTC device '%s'/%d pDevIns=%p\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, pDevIns));
+    }
+    else
+        rc = VERR_NO_MEMORY;
+
+    LogFlow(("pdmR3DevHlp_RTCRegister: caller='%s'/%d: returns %Rrc\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, rc));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnDMARegister} */
+static DECLCALLBACK(int) pdmR3DevHlp_DMARegister(PPDMDEVINS pDevIns, unsigned uChannel, PFNDMATRANSFERHANDLER pfnTransferHandler, void *pvUser)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    VM_ASSERT_EMT(pVM);
+    LogFlow(("pdmR3DevHlp_DMARegister: caller='%s'/%d: uChannel=%d pfnTransferHandler=%p pvUser=%p\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, uChannel, pfnTransferHandler, pvUser));
+    int rc = VINF_SUCCESS;
+    if (pVM->pdm.s.pDmac)
+        pVM->pdm.s.pDmac->Reg.pfnRegister(pVM->pdm.s.pDmac->pDevIns, uChannel, pDevIns, pfnTransferHandler, pvUser);
+    else
+    {
+        AssertMsgFailed(("Configuration error: No DMAC controller available. This could be related to init order too!\n"));
+        rc = VERR_PDM_NO_DMAC_INSTANCE;
+    }
+    LogFlow(("pdmR3DevHlp_DMARegister: caller='%s'/%d: returns %Rrc\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, rc));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnDMAReadMemory} */
+static DECLCALLBACK(int) pdmR3DevHlp_DMAReadMemory(PPDMDEVINS pDevIns, unsigned uChannel, void *pvBuffer, uint32_t off, uint32_t cbBlock, uint32_t *pcbRead)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    VM_ASSERT_EMT(pVM);
+    LogFlow(("pdmR3DevHlp_DMAReadMemory: caller='%s'/%d: uChannel=%d pvBuffer=%p off=%#x cbBlock=%#x pcbRead=%p\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, uChannel, pvBuffer, off, cbBlock, pcbRead));
+    int rc = VINF_SUCCESS;
+    if (pVM->pdm.s.pDmac)
+    {
+        uint32_t cb = pVM->pdm.s.pDmac->Reg.pfnReadMemory(pVM->pdm.s.pDmac->pDevIns, uChannel, pvBuffer, off, cbBlock);
+        if (pcbRead)
+            *pcbRead = cb;
+    }
+    else
+    {
+        AssertMsgFailed(("Configuration error: No DMAC controller available. This could be related to init order too!\n"));
+        rc = VERR_PDM_NO_DMAC_INSTANCE;
+    }
+    LogFlow(("pdmR3DevHlp_DMAReadMemory: caller='%s'/%d: returns %Rrc\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, rc));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnDMAWriteMemory} */
+static DECLCALLBACK(int) pdmR3DevHlp_DMAWriteMemory(PPDMDEVINS pDevIns, unsigned uChannel, const void *pvBuffer, uint32_t off, uint32_t cbBlock, uint32_t *pcbWritten)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    VM_ASSERT_EMT(pVM);
+    LogFlow(("pdmR3DevHlp_DMAWriteMemory: caller='%s'/%d: uChannel=%d pvBuffer=%p off=%#x cbBlock=%#x pcbWritten=%p\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, uChannel, pvBuffer, off, cbBlock, pcbWritten));
+    int rc = VINF_SUCCESS;
+    if (pVM->pdm.s.pDmac)
+    {
+        uint32_t cb = pVM->pdm.s.pDmac->Reg.pfnWriteMemory(pVM->pdm.s.pDmac->pDevIns, uChannel, pvBuffer, off, cbBlock);
+        if (pcbWritten)
+            *pcbWritten = cb;
+    }
+    else
+    {
+        AssertMsgFailed(("Configuration error: No DMAC controller available. This could be related to init order too!\n"));
+        rc = VERR_PDM_NO_DMAC_INSTANCE;
+    }
+    LogFlow(("pdmR3DevHlp_DMAWriteMemory: caller='%s'/%d: returns %Rrc\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, rc));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnDMASetDREQ} */
+static DECLCALLBACK(int) pdmR3DevHlp_DMASetDREQ(PPDMDEVINS pDevIns, unsigned uChannel, unsigned uLevel)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    VM_ASSERT_EMT(pVM);
+    LogFlow(("pdmR3DevHlp_DMASetDREQ: caller='%s'/%d: uChannel=%d uLevel=%d\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, uChannel, uLevel));
+    int rc = VINF_SUCCESS;
+    if (pVM->pdm.s.pDmac)
+        pVM->pdm.s.pDmac->Reg.pfnSetDREQ(pVM->pdm.s.pDmac->pDevIns, uChannel, uLevel);
+    else
+    {
+        AssertMsgFailed(("Configuration error: No DMAC controller available. This could be related to init order too!\n"));
+        rc = VERR_PDM_NO_DMAC_INSTANCE;
+    }
+    LogFlow(("pdmR3DevHlp_DMASetDREQ: caller='%s'/%d: returns %Rrc\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, rc));
+    return rc;
+}
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnDMAGetChannelMode} */
+static DECLCALLBACK(uint8_t) pdmR3DevHlp_DMAGetChannelMode(PPDMDEVINS pDevIns, unsigned uChannel)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    VM_ASSERT_EMT(pVM);
+    LogFlow(("pdmR3DevHlp_DMAGetChannelMode: caller='%s'/%d: uChannel=%d\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, uChannel));
+    uint8_t u8Mode;
+    if (pVM->pdm.s.pDmac)
+        u8Mode = pVM->pdm.s.pDmac->Reg.pfnGetChannelMode(pVM->pdm.s.pDmac->pDevIns, uChannel);
+    else
+    {
+        AssertMsgFailed(("Configuration error: No DMAC controller available. This could be related to init order too!\n"));
+        u8Mode = 3 << 2 /* illegal mode type */;
+    }
+    LogFlow(("pdmR3DevHlp_DMAGetChannelMode: caller='%s'/%d: returns %#04x\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, u8Mode));
+    return u8Mode;
+}
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnDMASchedule} */
+static DECLCALLBACK(void) pdmR3DevHlp_DMASchedule(PPDMDEVINS pDevIns)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    VM_ASSERT_EMT(pVM);
+    LogFlow(("pdmR3DevHlp_DMASchedule: caller='%s'/%d: VM_FF_PDM_DMA %d -> 1\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, VM_FF_IS_SET(pVM, VM_FF_PDM_DMA)));
+
+    AssertMsg(pVM->pdm.s.pDmac, ("Configuration error: No DMAC controller available. This could be related to init order too!\n"));
+    VM_FF_SET(pVM, VM_FF_PDM_DMA);
+    VMR3NotifyGlobalFFU(pVM->pUVM, VMNOTIFYFF_FLAGS_DONE_REM);
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnCMOSWrite} */
+static DECLCALLBACK(int) pdmR3DevHlp_CMOSWrite(PPDMDEVINS pDevIns, unsigned iReg, uint8_t u8Value)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    VM_ASSERT_EMT(pVM);
+
+    LogFlow(("pdmR3DevHlp_CMOSWrite: caller='%s'/%d: iReg=%#04x u8Value=%#04x\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, iReg, u8Value));
+    int rc;
+    if (pVM->pdm.s.pRtc)
+    {
+        PPDMDEVINS pDevInsRtc = pVM->pdm.s.pRtc->pDevIns;
+        rc = PDMCritSectEnter(pDevInsRtc->pCritSectRoR3, VERR_IGNORED);
+        if (RT_SUCCESS(rc))
+        {
+            rc = pVM->pdm.s.pRtc->Reg.pfnWrite(pDevInsRtc, iReg, u8Value);
+            PDMCritSectLeave(pDevInsRtc->pCritSectRoR3);
+        }
+    }
+    else
+        rc = VERR_PDM_NO_RTC_INSTANCE;
+
+    LogFlow(("pdmR3DevHlp_CMOSWrite: caller='%s'/%d: return %Rrc\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, rc));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnCMOSRead} */
+static DECLCALLBACK(int) pdmR3DevHlp_CMOSRead(PPDMDEVINS pDevIns, unsigned iReg, uint8_t *pu8Value)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    VM_ASSERT_EMT(pVM);
+
+    LogFlow(("pdmR3DevHlp_CMOSWrite: caller='%s'/%d: iReg=%#04x pu8Value=%p\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, iReg, pu8Value));
+    int rc;
+    if (pVM->pdm.s.pRtc)
+    {
+        PPDMDEVINS pDevInsRtc = pVM->pdm.s.pRtc->pDevIns;
+        rc = PDMCritSectEnter(pDevInsRtc->pCritSectRoR3, VERR_IGNORED);
+        if (RT_SUCCESS(rc))
+        {
+            rc = pVM->pdm.s.pRtc->Reg.pfnRead(pDevInsRtc, iReg, pu8Value);
+            PDMCritSectLeave(pDevInsRtc->pCritSectRoR3);
+        }
+    }
+    else
+        rc = VERR_PDM_NO_RTC_INSTANCE;
+
+    LogFlow(("pdmR3DevHlp_CMOSWrite: caller='%s'/%d: return %Rrc\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, rc));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnAssertEMT} */
+static DECLCALLBACK(bool) pdmR3DevHlp_AssertEMT(PPDMDEVINS pDevIns, const char *pszFile, unsigned iLine, const char *pszFunction)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    if (VM_IS_EMT(pDevIns->Internal.s.pVMR3))
+        return true;
+
+    char szMsg[100];
+    RTStrPrintf(szMsg, sizeof(szMsg), "AssertEMT '%s'/%d\n", pDevIns->pReg->szName, pDevIns->iInstance);
+    RTAssertMsg1Weak(szMsg, iLine, pszFile, pszFunction);
+    AssertBreakpoint();
+    return false;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnAssertOther} */
+static DECLCALLBACK(bool) pdmR3DevHlp_AssertOther(PPDMDEVINS pDevIns, const char *pszFile, unsigned iLine, const char *pszFunction)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    if (!VM_IS_EMT(pDevIns->Internal.s.pVMR3))
+        return true;
+
+    char szMsg[100];
+    RTStrPrintf(szMsg, sizeof(szMsg), "AssertOther '%s'/%d\n", pDevIns->pReg->szName, pDevIns->iInstance);
+    RTAssertMsg1Weak(szMsg, iLine, pszFile, pszFunction);
+    AssertBreakpoint();
+    return false;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnLdrGetRCInterfaceSymbols} */
+static DECLCALLBACK(int) pdmR3DevHlp_LdrGetRCInterfaceSymbols(PPDMDEVINS pDevIns, void *pvInterface, size_t cbInterface,
+                                                              const char *pszSymPrefix, const char *pszSymList)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    VM_ASSERT_EMT(pDevIns->Internal.s.pVMR3);
+    LogFlow(("pdmR3DevHlp_PDMLdrGetRCInterfaceSymbols: caller='%s'/%d: pvInterface=%p cbInterface=%zu pszSymPrefix=%p:{%s} pszSymList=%p:{%s}\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, pvInterface, cbInterface, pszSymPrefix, pszSymPrefix, pszSymList, pszSymList));
+
+    int rc;
+    if (   strncmp(pszSymPrefix, "dev", 3) == 0
+        && RTStrIStr(pszSymPrefix + 3, pDevIns->pReg->szName) != NULL)
+    {
+        if (pDevIns->pReg->fFlags & PDM_DEVREG_FLAGS_RC)
+            rc = PDMR3LdrGetInterfaceSymbols(pDevIns->Internal.s.pVMR3,
+                                             pvInterface, cbInterface,
+                                             pDevIns->pReg->pszRCMod, pDevIns->Internal.s.pDevR3->pszRCSearchPath,
+                                             pszSymPrefix, pszSymList,
+                                             false /*fRing0OrRC*/);
+        else
+        {
+            AssertMsgFailed(("Not a raw-mode enabled driver\n"));
+            rc = VERR_PERMISSION_DENIED;
+        }
+    }
+    else
+    {
+        AssertMsgFailed(("Invalid prefix '%s' for '%s'; must start with 'dev' and contain the driver name!\n",
+                         pszSymPrefix, pDevIns->pReg->szName));
+        rc = VERR_INVALID_NAME;
+    }
+
+    LogFlow(("pdmR3DevHlp_PDMLdrGetRCInterfaceSymbols: caller='%s'/%d: returns %Rrc\n", pDevIns->pReg->szName,
+             pDevIns->iInstance, rc));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnLdrGetR0InterfaceSymbols} */
+static DECLCALLBACK(int) pdmR3DevHlp_LdrGetR0InterfaceSymbols(PPDMDEVINS pDevIns, void *pvInterface, size_t cbInterface,
+                                                              const char *pszSymPrefix, const char *pszSymList)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    VM_ASSERT_EMT(pDevIns->Internal.s.pVMR3);
+    LogFlow(("pdmR3DevHlp_PDMLdrGetR0InterfaceSymbols: caller='%s'/%d: pvInterface=%p cbInterface=%zu pszSymPrefix=%p:{%s} pszSymList=%p:{%s}\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, pvInterface, cbInterface, pszSymPrefix, pszSymPrefix, pszSymList, pszSymList));
+
+    int rc;
+    if (   strncmp(pszSymPrefix, "dev", 3) == 0
+        && RTStrIStr(pszSymPrefix + 3, pDevIns->pReg->szName) != NULL)
+    {
+        if (pDevIns->pReg->fFlags & PDM_DEVREG_FLAGS_R0)
+            rc = PDMR3LdrGetInterfaceSymbols(pDevIns->Internal.s.pVMR3,
+                                             pvInterface, cbInterface,
+                                             pDevIns->pReg->pszR0Mod, pDevIns->Internal.s.pDevR3->pszR0SearchPath,
+                                             pszSymPrefix, pszSymList,
+                                             true /*fRing0OrRC*/);
+        else
+        {
+            AssertMsgFailed(("Not a ring-0 enabled driver\n"));
+            rc = VERR_PERMISSION_DENIED;
+        }
+    }
+    else
+    {
+        AssertMsgFailed(("Invalid prefix '%s' for '%s'; must start with 'dev' and contain the driver name!\n",
+                         pszSymPrefix, pDevIns->pReg->szName));
+        rc = VERR_INVALID_NAME;
+    }
+
+    LogFlow(("pdmR3DevHlp_PDMLdrGetR0InterfaceSymbols: caller='%s'/%d: returns %Rrc\n", pDevIns->pReg->szName,
+             pDevIns->iInstance, rc));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnCallR0} */
+static DECLCALLBACK(int) pdmR3DevHlp_CallR0(PPDMDEVINS pDevIns, uint32_t uOperation, uint64_t u64Arg)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    PVM    pVM = pDevIns->Internal.s.pVMR3;
+    PVMCPU pVCpu = VMMGetCpu(pVM);
+    AssertReturn(pVCpu, VERR_VM_THREAD_IS_EMT);
+    LogFlow(("pdmR3DevHlp_CallR0: caller='%s'/%d: uOperation=%#x u64Arg=%#RX64\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, uOperation, u64Arg));
+
+    /*
+     * Resolve the ring-0 entry point.  There is not need to remember this like
+     * we do for drivers since this is mainly for construction time hacks and
+     * other things that aren't performance critical.
+     */
+    int rc;
+    if (pDevIns->pReg->fFlags & PDM_DEVREG_FLAGS_R0)
+    {
+        /*
+         * Make the ring-0 call.
+         */
+        PDMDEVICEGENCALLREQ Req;
+        RT_ZERO(Req.Params);
+        Req.Hdr.u32Magic    = SUPVMMR0REQHDR_MAGIC;
+        Req.Hdr.cbReq       = sizeof(Req);
+        Req.pDevInsR3       = pDevIns;
+        Req.idxR0Device     = pDevIns->Internal.s.idxR0Device;
+        Req.enmCall         = PDMDEVICEGENCALL_REQUEST;
+        Req.Params.Req.uReq = uOperation;
+        Req.Params.Req.uArg = u64Arg;
+        rc = VMMR3CallR0Emt(pVM, pVCpu, VMMR0_DO_PDM_DEVICE_GEN_CALL, 0, &Req.Hdr);
+    }
+    else
+        rc = VERR_ACCESS_DENIED;
+    LogFlow(("pdmR3DevHlp_CallR0: caller='%s'/%d: returns %Rrc\n", pDevIns->pReg->szName,
+             pDevIns->iInstance, rc));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnVMGetSuspendReason} */
+static DECLCALLBACK(VMSUSPENDREASON) pdmR3DevHlp_VMGetSuspendReason(PPDMDEVINS pDevIns)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    VM_ASSERT_EMT(pVM);
+    VMSUSPENDREASON enmReason = VMR3GetSuspendReason(pVM->pUVM);
+    LogFlow(("pdmR3DevHlp_VMGetSuspendReason: caller='%s'/%d: returns %d\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, enmReason));
+    return enmReason;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnVMGetResumeReason} */
+static DECLCALLBACK(VMRESUMEREASON) pdmR3DevHlp_VMGetResumeReason(PPDMDEVINS pDevIns)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    VM_ASSERT_EMT(pVM);
+    VMRESUMEREASON enmReason = VMR3GetResumeReason(pVM->pUVM);
+    LogFlow(("pdmR3DevHlp_VMGetResumeReason: caller='%s'/%d: returns %d\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, enmReason));
+    return enmReason;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnGetUVM} */
+static DECLCALLBACK(PUVM) pdmR3DevHlp_GetUVM(PPDMDEVINS pDevIns)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    LogFlow(("pdmR3DevHlp_GetUVM: caller='%s'/%d: returns %p\n", pDevIns->pReg->szName, pDevIns->iInstance, pDevIns->Internal.s.pVMR3));
+    return pDevIns->Internal.s.pVMR3->pUVM;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnGetVM} */
+static DECLCALLBACK(PVM) pdmR3DevHlp_GetVM(PPDMDEVINS pDevIns)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    LogFlow(("pdmR3DevHlp_GetVM: caller='%s'/%d: returns %p\n", pDevIns->pReg->szName, pDevIns->iInstance, pDevIns->Internal.s.pVMR3));
+    return pDevIns->Internal.s.pVMR3;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnGetVMCPU} */
+static DECLCALLBACK(PVMCPU) pdmR3DevHlp_GetVMCPU(PPDMDEVINS pDevIns)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    VM_ASSERT_EMT(pDevIns->Internal.s.pVMR3);
+    LogFlow(("pdmR3DevHlp_GetVMCPU: caller='%s'/%d for CPU %u\n", pDevIns->pReg->szName, pDevIns->iInstance, VMMGetCpuId(pDevIns->Internal.s.pVMR3)));
+    return VMMGetCpu(pDevIns->Internal.s.pVMR3);
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnGetCurrentCpuId} */
+static DECLCALLBACK(VMCPUID) pdmR3DevHlp_GetCurrentCpuId(PPDMDEVINS pDevIns)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    VMCPUID idCpu = VMMGetCpuId(pDevIns->Internal.s.pVMR3);
+    LogFlow(("pdmR3DevHlp_GetCurrentCpuId: caller='%s'/%d for CPU %u\n", pDevIns->pReg->szName, pDevIns->iInstance, idCpu));
+    return idCpu;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnPCIBusRegister} */
+static DECLCALLBACK(int) pdmR3DevHlp_PCIBusRegister(PPDMDEVINS pDevIns, PPDMPCIBUSREGR3 pPciBusReg,
+                                                    PCPDMPCIHLPR3 *ppPciHlp, uint32_t *piBus)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    VM_ASSERT_EMT(pVM);
+    LogFlow(("pdmR3DevHlp_PCIBusRegister: caller='%s'/%d: pPciBusReg=%p:{.u32Version=%#x, .pfnRegisterR3=%p, .pfnIORegionRegisterR3=%p, "
+             ".pfnInterceptConfigAccesses=%p, pfnConfigRead=%p, pfnConfigWrite=%p, .pfnSetIrqR3=%p, .u32EndVersion=%#x} ppPciHlpR3=%p piBus=%p\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, pPciBusReg, pPciBusReg->u32Version, pPciBusReg->pfnRegisterR3,
+             pPciBusReg->pfnIORegionRegisterR3, pPciBusReg->pfnInterceptConfigAccesses, pPciBusReg->pfnConfigRead,
+             pPciBusReg->pfnConfigWrite, pPciBusReg->pfnSetIrqR3, pPciBusReg->u32EndVersion, ppPciHlp, piBus));
+
+    /*
+     * Validate the structure and output parameters.
+     */
+    AssertLogRelMsgReturn(pPciBusReg->u32Version == PDM_PCIBUSREGR3_VERSION,
+                          ("u32Version=%#x expected %#x\n", pPciBusReg->u32Version, PDM_PCIBUSREGR3_VERSION),
+                          VERR_INVALID_PARAMETER);
+    AssertPtrReturn(pPciBusReg->pfnRegisterR3, VERR_INVALID_PARAMETER);
+    AssertPtrNullReturn(pPciBusReg->pfnRegisterMsiR3, VERR_INVALID_POINTER);
+    AssertPtrReturn(pPciBusReg->pfnIORegionRegisterR3, VERR_INVALID_POINTER);
+    AssertPtrReturn(pPciBusReg->pfnInterceptConfigAccesses, VERR_INVALID_POINTER);
+    AssertPtrReturn(pPciBusReg->pfnConfigWrite, VERR_INVALID_POINTER);
+    AssertPtrReturn(pPciBusReg->pfnConfigRead, VERR_INVALID_POINTER);
+    AssertPtrReturn(pPciBusReg->pfnSetIrqR3, VERR_INVALID_POINTER);
+    AssertLogRelMsgReturn(pPciBusReg->u32EndVersion == PDM_PCIBUSREGR3_VERSION,
+                          ("u32Version=%#x expected %#x\n", pPciBusReg->u32Version, PDM_PCIBUSREGR3_VERSION),
+                          VERR_INVALID_PARAMETER);
+    AssertPtrReturn(ppPciHlp, VERR_INVALID_POINTER);
+    AssertPtrNullReturn(piBus, VERR_INVALID_POINTER);
+    VM_ASSERT_STATE_RETURN(pVM, VMSTATE_CREATING, VERR_WRONG_ORDER);
+
+    /*
+     * Find free PCI bus entry.
+     */
+    unsigned iBus = 0;
+    for (iBus = 0; iBus < RT_ELEMENTS(pVM->pdm.s.aPciBuses); iBus++)
+        if (!pVM->pdm.s.aPciBuses[iBus].pDevInsR3)
+            break;
+    AssertLogRelMsgReturn(iBus < RT_ELEMENTS(pVM->pdm.s.aPciBuses),
+                          ("Too many PCI buses. Max=%u\n", RT_ELEMENTS(pVM->pdm.s.aPciBuses)),
+                          VERR_OUT_OF_RESOURCES);
+    PPDMPCIBUS pPciBus = &pVM->pdm.s.aPciBuses[iBus];
+
+    /*
+     * Init the R3 bits.
+     */
+    pPciBus->iBus                       = iBus;
+    pPciBus->pDevInsR3                  = pDevIns;
+    pPciBus->pfnRegister                = pPciBusReg->pfnRegisterR3;
+    pPciBus->pfnRegisterMsi             = pPciBusReg->pfnRegisterMsiR3;
+    pPciBus->pfnIORegionRegister        = pPciBusReg->pfnIORegionRegisterR3;
+    pPciBus->pfnInterceptConfigAccesses = pPciBusReg->pfnInterceptConfigAccesses;
+    pPciBus->pfnConfigRead              = pPciBusReg->pfnConfigRead;
+    pPciBus->pfnConfigWrite             = pPciBusReg->pfnConfigWrite;
+    pPciBus->pfnSetIrqR3                = pPciBusReg->pfnSetIrqR3;
+
+    Log(("PDM: Registered PCI bus device '%s'/%d pDevIns=%p\n", pDevIns->pReg->szName, pDevIns->iInstance, pDevIns));
+
+    /* set the helper pointer and return. */
+    *ppPciHlp = &g_pdmR3DevPciHlp;
+    if (piBus)
+        *piBus = iBus;
+    LogFlow(("pdmR3DevHlp_PCIBusRegister: caller='%s'/%d: returns %Rrc *piBus=%u\n", pDevIns->pReg->szName, pDevIns->iInstance, VINF_SUCCESS, iBus));
+    return VINF_SUCCESS;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnPICRegister} */
+static DECLCALLBACK(int) pdmR3DevHlp_PICRegister(PPDMDEVINS pDevIns, PPDMPICREG pPicReg, PCPDMPICHLP *ppPicHlp)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    VM_ASSERT_EMT(pDevIns->Internal.s.pVMR3);
+    LogFlow(("pdmR3DevHlp_PICRegister: caller='%s'/%d: pPicReg=%p:{.u32Version=%#x, .pfnSetIrq=%p, .pfnGetInterrupt=%p, .u32TheEnd=%#x } ppPicHlp=%p\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, pPicReg, pPicReg->u32Version, pPicReg->pfnSetIrq, pPicReg->pfnGetInterrupt, pPicReg->u32TheEnd, ppPicHlp));
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+
+    /*
+     * Validate input.
+     */
+    AssertMsgReturn(pPicReg->u32Version == PDM_PICREG_VERSION,
+                    ("%s/%d: u32Version=%#x expected %#x\n", pDevIns->pReg->szName, pDevIns->iInstance, pPicReg->u32Version, PDM_PICREG_VERSION),
+                    VERR_INVALID_PARAMETER);
+    AssertPtrReturn(pPicReg->pfnSetIrq, VERR_INVALID_POINTER);
+    AssertPtrReturn(pPicReg->pfnGetInterrupt, VERR_INVALID_POINTER);
+    AssertMsgReturn(pPicReg->u32TheEnd == PDM_PICREG_VERSION,
+                    ("%s/%d: u32TheEnd=%#x expected %#x\n", pDevIns->pReg->szName, pDevIns->iInstance, pPicReg->u32TheEnd, PDM_PICREG_VERSION),
+                    VERR_INVALID_PARAMETER);
+    AssertPtrReturn(ppPicHlp, VERR_INVALID_POINTER);
+
+    VM_ASSERT_STATE_RETURN(pVM, VMSTATE_CREATING, VERR_WRONG_ORDER);
+    VM_ASSERT_EMT0_RETURN(pVM, VERR_VM_THREAD_NOT_EMT);
+
+    /*
+     * Only one PIC device.
+     */
+    AssertMsgReturn(pVM->pdm.s.Pic.pDevInsR3 == NULL, ("%s/%d: Only one PIC!\n", pDevIns->pReg->szName, pDevIns->iInstance),
+                    VERR_ALREADY_EXISTS);
+
+    /*
+     * Take down the callbacks and instance.
+     */
+    pVM->pdm.s.Pic.pDevInsR3 = pDevIns;
+    pVM->pdm.s.Pic.pfnSetIrqR3 = pPicReg->pfnSetIrq;
+    pVM->pdm.s.Pic.pfnGetInterruptR3 = pPicReg->pfnGetInterrupt;
+    Log(("PDM: Registered PIC device '%s'/%d pDevIns=%p\n", pDevIns->pReg->szName, pDevIns->iInstance, pDevIns));
+
+    /* set the helper pointer and return. */
+    *ppPicHlp = &g_pdmR3DevPicHlp;
+    LogFlow(("pdmR3DevHlp_PICRegister: caller='%s'/%d: returns %Rrc\n", pDevIns->pReg->szName, pDevIns->iInstance, VINF_SUCCESS));
+    return VINF_SUCCESS;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnApicRegister} */
+static DECLCALLBACK(int) pdmR3DevHlp_ApicRegister(PPDMDEVINS pDevIns)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+
+    /*
+     * Validate caller context.
+     */
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    VM_ASSERT_STATE_RETURN(pVM, VMSTATE_CREATING, VERR_WRONG_ORDER);
+    VM_ASSERT_EMT0_RETURN(pVM, VERR_VM_THREAD_NOT_EMT);
+
+    /*
+     * Only one APIC device. On SMP we have single logical device covering all LAPICs,
+     * as they need to communicate and share state easily.
+     */
+    AssertMsgReturn(pVM->pdm.s.Apic.pDevInsR3 == NULL,
+                    ("%s/%u: Only one APIC device is supported!\n", pDevIns->pReg->szName, pDevIns->iInstance),
+                    VERR_ALREADY_EXISTS);
+
+    /*
+     * Set the ring-3 and raw-mode bits, leave the ring-0 to ring-0 setup.
+     */
+    pVM->pdm.s.Apic.pDevInsR3 = pDevIns;
+    pVM->pdm.s.Apic.pDevInsRC = PDMDEVINS_2_RCPTR(pDevIns);
+    Assert(pVM->pdm.s.Apic.pDevInsRC || !VM_IS_RAW_MODE_ENABLED(pVM));
+
+    LogFlow(("pdmR3DevHlp_ApicRegister: caller='%s'/%d: returns %Rrc\n", pDevIns->pReg->szName, pDevIns->iInstance, VINF_SUCCESS));
+    return VINF_SUCCESS;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnIoApicRegister} */
+static DECLCALLBACK(int) pdmR3DevHlp_IoApicRegister(PPDMDEVINS pDevIns, PPDMIOAPICREG pIoApicReg, PCPDMIOAPICHLP *ppIoApicHlp)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    LogFlow(("pdmR3DevHlp_IoApicRegister: caller='%s'/%d: pIoApicReg=%p:{.u32Version=%#x, .pfnSetIrq=%p, .pfnSendMsi=%p, .pfnSetEoi=%p, .u32TheEnd=%#x } ppIoApicHlp=%p\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, pIoApicReg, pIoApicReg->u32Version, pIoApicReg->pfnSetIrq, pIoApicReg->pfnSendMsi, pIoApicReg->pfnSetEoi, pIoApicReg->u32TheEnd, ppIoApicHlp));
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+
+    /*
+     * Validate input.
+     */
+    AssertMsgReturn(pIoApicReg->u32Version == PDM_IOAPICREG_VERSION,
+                    ("%s/%d: u32Version=%#x expected %#x\n", pDevIns->pReg->szName, pDevIns->iInstance, pIoApicReg->u32Version, PDM_IOAPICREG_VERSION),
+                    VERR_VERSION_MISMATCH);
+    AssertPtrReturn(pIoApicReg->pfnSetIrq, VERR_INVALID_POINTER);
+    AssertPtrReturn(pIoApicReg->pfnSendMsi, VERR_INVALID_POINTER);
+    AssertPtrReturn(pIoApicReg->pfnSetEoi, VERR_INVALID_POINTER);
+    AssertMsgReturn(pIoApicReg->u32TheEnd == PDM_IOAPICREG_VERSION,
+                    ("%s/%d: u32TheEnd=%#x expected %#x\n", pDevIns->pReg->szName, pDevIns->iInstance, pIoApicReg->u32TheEnd, PDM_IOAPICREG_VERSION),
+                    VERR_VERSION_MISMATCH);
+    AssertPtrReturn(ppIoApicHlp, VERR_INVALID_POINTER);
+    VM_ASSERT_STATE_RETURN(pVM, VMSTATE_CREATING, VERR_WRONG_ORDER);
+    VM_ASSERT_EMT0_RETURN(pVM, VERR_VM_THREAD_NOT_EMT);
+
+    /*
+     * The I/O APIC requires the APIC to be present (hacks++).
+     * If the I/O APIC does GC stuff so must the APIC.
+     */
+    AssertMsgReturn(pVM->pdm.s.Apic.pDevInsR3 != NULL, ("Configuration error / Init order error! No APIC!\n"), VERR_WRONG_ORDER);
+
+    /*
+     * Only one I/O APIC device.
+     */
+    AssertMsgReturn(pVM->pdm.s.IoApic.pDevInsR3 == NULL,
+                    ("Only one IOAPIC device is supported! (caller %s/%d)\n", pDevIns->pReg->szName, pDevIns->iInstance),
+                    VERR_ALREADY_EXISTS);
+
+    /*
+     * Initialize the R3 bits.
+     */
+    pVM->pdm.s.IoApic.pDevInsR3    = pDevIns;
+    pVM->pdm.s.IoApic.pfnSetIrqR3  = pIoApicReg->pfnSetIrq;
+    pVM->pdm.s.IoApic.pfnSendMsiR3 = pIoApicReg->pfnSendMsi;
+    pVM->pdm.s.IoApic.pfnSetEoiR3  = pIoApicReg->pfnSetEoi;
+    Log(("PDM: Registered I/O APIC device '%s'/%d pDevIns=%p\n", pDevIns->pReg->szName, pDevIns->iInstance, pDevIns));
+
+    /* set the helper pointer and return. */
+    *ppIoApicHlp = &g_pdmR3DevIoApicHlp;
+    LogFlow(("pdmR3DevHlp_IoApicRegister: caller='%s'/%d: returns %Rrc\n", pDevIns->pReg->szName, pDevIns->iInstance, VINF_SUCCESS));
+    return VINF_SUCCESS;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnHpetRegister} */
+static DECLCALLBACK(int) pdmR3DevHlp_HpetRegister(PPDMDEVINS pDevIns, PPDMHPETREG pHpetReg, PCPDMHPETHLPR3 *ppHpetHlpR3)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    LogFlow(("pdmR3DevHlp_HpetRegister: caller='%s'/%d:\n", pDevIns->pReg->szName, pDevIns->iInstance));
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+
+    /*
+     * Validate input.
+     */
+    AssertMsgReturn(pHpetReg->u32Version == PDM_HPETREG_VERSION,
+                    ("%s/%u: u32Version=%#x expected %#x\n", pDevIns->pReg->szName, pDevIns->iInstance, pHpetReg->u32Version, PDM_HPETREG_VERSION),
+                    VERR_VERSION_MISMATCH);
+    AssertPtrReturn(ppHpetHlpR3, VERR_INVALID_POINTER);
+    VM_ASSERT_STATE_RETURN(pVM, VMSTATE_CREATING, VERR_WRONG_ORDER);
+    VM_ASSERT_EMT0_RETURN(pVM, VERR_VM_THREAD_NOT_EMT);
+
+    /*
+     * Only one HPET device.
+     */
+    AssertMsgReturn(pVM->pdm.s.pHpet == NULL,
+                    ("Only one HPET device is supported! (caller %s/%d)\n", pDevIns->pReg->szName, pDevIns->iInstance),
+                    VERR_ALREADY_EXISTS);
+
+    /*
+     * Do the job (what there is of it).
+     */
+    pVM->pdm.s.pHpet = pDevIns;
+    *ppHpetHlpR3 = &g_pdmR3DevHpetHlp;
+
+    LogFlow(("pdmR3DevHlp_HpetRegister: caller='%s'/%d: returns %Rrc\n", pDevIns->pReg->szName, pDevIns->iInstance, VINF_SUCCESS));
+    return VINF_SUCCESS;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnPciRawRegister} */
+static DECLCALLBACK(int) pdmR3DevHlp_PciRawRegister(PPDMDEVINS pDevIns, PPDMPCIRAWREG pPciRawReg, PCPDMPCIRAWHLPR3 *ppPciRawHlpR3)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns); RT_NOREF_PV(pDevIns);
+    VM_ASSERT_EMT(pDevIns->Internal.s.pVMR3);
+    LogFlow(("pdmR3DevHlp_PciRawRegister: caller='%s'/%d:\n", pDevIns->pReg->szName, pDevIns->iInstance));
+
+    /*
+     * Validate input.
+     */
+    if (pPciRawReg->u32Version != PDM_PCIRAWREG_VERSION)
+    {
+        AssertMsgFailed(("u32Version=%#x expected %#x\n", pPciRawReg->u32Version, PDM_PCIRAWREG_VERSION));
+        LogFlow(("pdmR3DevHlp_PciRawRegister: caller='%s'/%d: returns %Rrc (version)\n", pDevIns->pReg->szName, pDevIns->iInstance, VERR_INVALID_PARAMETER));
+        return VERR_INVALID_PARAMETER;
+    }
+
+    if (!ppPciRawHlpR3)
+    {
+        Assert(ppPciRawHlpR3);
+        LogFlow(("pdmR3DevHlp_PciRawRegister: caller='%s'/%d: returns %Rrc (ppPciRawHlpR3)\n", pDevIns->pReg->szName, pDevIns->iInstance, VERR_INVALID_PARAMETER));
+        return VERR_INVALID_PARAMETER;
+    }
+
+    /* set the helper pointer and return. */
+    *ppPciRawHlpR3 = &g_pdmR3DevPciRawHlp;
+    LogFlow(("pdmR3DevHlp_PciRawRegister: caller='%s'/%d: returns %Rrc\n", pDevIns->pReg->szName, pDevIns->iInstance, VINF_SUCCESS));
+    return VINF_SUCCESS;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnDMACRegister} */
+static DECLCALLBACK(int) pdmR3DevHlp_DMACRegister(PPDMDEVINS pDevIns, PPDMDMACREG pDmacReg, PCPDMDMACHLP *ppDmacHlp)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    VM_ASSERT_EMT(pDevIns->Internal.s.pVMR3);
+    LogFlow(("pdmR3DevHlp_DMACRegister: caller='%s'/%d: pDmacReg=%p:{.u32Version=%#x, .pfnRun=%p, .pfnRegister=%p, .pfnReadMemory=%p, .pfnWriteMemory=%p, .pfnSetDREQ=%p, .pfnGetChannelMode=%p} ppDmacHlp=%p\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, pDmacReg, pDmacReg->u32Version, pDmacReg->pfnRun, pDmacReg->pfnRegister,
+             pDmacReg->pfnReadMemory, pDmacReg->pfnWriteMemory, pDmacReg->pfnSetDREQ, pDmacReg->pfnGetChannelMode, ppDmacHlp));
+
+    /*
+     * Validate input.
+     */
+    if (pDmacReg->u32Version != PDM_DMACREG_VERSION)
+    {
+        AssertMsgFailed(("u32Version=%#x expected %#x\n", pDmacReg->u32Version,
+                         PDM_DMACREG_VERSION));
+        LogFlow(("pdmR3DevHlp_DMACRegister: caller='%s'/%d: returns %Rrc (version)\n",
+                 pDevIns->pReg->szName, pDevIns->iInstance, VERR_INVALID_PARAMETER));
+        return VERR_INVALID_PARAMETER;
+    }
+    if (    !pDmacReg->pfnRun
+        ||  !pDmacReg->pfnRegister
+        ||  !pDmacReg->pfnReadMemory
+        ||  !pDmacReg->pfnWriteMemory
+        ||  !pDmacReg->pfnSetDREQ
+        ||  !pDmacReg->pfnGetChannelMode)
+    {
+        Assert(pDmacReg->pfnRun);
+        Assert(pDmacReg->pfnRegister);
+        Assert(pDmacReg->pfnReadMemory);
+        Assert(pDmacReg->pfnWriteMemory);
+        Assert(pDmacReg->pfnSetDREQ);
+        Assert(pDmacReg->pfnGetChannelMode);
+        LogFlow(("pdmR3DevHlp_DMACRegister: caller='%s'/%d: returns %Rrc (callbacks)\n",
+                 pDevIns->pReg->szName, pDevIns->iInstance, VERR_INVALID_PARAMETER));
+        return VERR_INVALID_PARAMETER;
+    }
+
+    if (!ppDmacHlp)
+    {
+        Assert(ppDmacHlp);
+        LogFlow(("pdmR3DevHlp_DMACRegister: caller='%s'/%d: returns %Rrc (ppDmacHlp)\n",
+                 pDevIns->pReg->szName, pDevIns->iInstance, VERR_INVALID_PARAMETER));
+        return VERR_INVALID_PARAMETER;
+    }
+
+    /*
+     * Only one DMA device.
+     */
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    if (pVM->pdm.s.pDmac)
+    {
+        AssertMsgFailed(("Only one DMA device is supported!\n"));
+        LogFlow(("pdmR3DevHlp_DMACRegister: caller='%s'/%d: returns %Rrc\n",
+                 pDevIns->pReg->szName, pDevIns->iInstance, VERR_INVALID_PARAMETER));
+        return VERR_INVALID_PARAMETER;
+    }
+
+    /*
+     * Allocate and initialize pci bus structure.
+     */
+    int rc = VINF_SUCCESS;
+    PPDMDMAC  pDmac = (PPDMDMAC)MMR3HeapAlloc(pDevIns->Internal.s.pVMR3, MM_TAG_PDM_DEVICE, sizeof(*pDmac));
+    if (pDmac)
+    {
+        pDmac->pDevIns   = pDevIns;
+        pDmac->Reg       = *pDmacReg;
+        pVM->pdm.s.pDmac = pDmac;
+
+        /* set the helper pointer. */
+        *ppDmacHlp = &g_pdmR3DevDmacHlp;
+        Log(("PDM: Registered DMAC device '%s'/%d pDevIns=%p\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, pDevIns));
+    }
+    else
+        rc = VERR_NO_MEMORY;
+
+    LogFlow(("pdmR3DevHlp_DMACRegister: caller='%s'/%d: returns %Rrc\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, rc));
+    return rc;
+}
+
+
+/**
+ * @copydoc PDMDEVHLPR3::pfnRegisterVMMDevHeap
+ */
+static DECLCALLBACK(int) pdmR3DevHlp_RegisterVMMDevHeap(PPDMDEVINS pDevIns, RTGCPHYS GCPhys, RTR3PTR pvHeap, unsigned cbHeap)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    VM_ASSERT_EMT(pVM);
+    LogFlow(("pdmR3DevHlp_RegisterVMMDevHeap: caller='%s'/%d: GCPhys=%RGp pvHeap=%p cbHeap=%#x\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, GCPhys, pvHeap, cbHeap));
+
+    if (pVM->pdm.s.pvVMMDevHeap == NULL)
+    {
+        pVM->pdm.s.pvVMMDevHeap     = pvHeap;
+        pVM->pdm.s.GCPhysVMMDevHeap = GCPhys;
+        pVM->pdm.s.cbVMMDevHeap     = cbHeap;
+        pVM->pdm.s.cbVMMDevHeapLeft = cbHeap;
+    }
+    else
+    {
+        Assert(pVM->pdm.s.pvVMMDevHeap == pvHeap);
+        Assert(pVM->pdm.s.cbVMMDevHeap == cbHeap);
+        Assert(pVM->pdm.s.GCPhysVMMDevHeap != GCPhys || GCPhys == NIL_RTGCPHYS);
+        if (pVM->pdm.s.GCPhysVMMDevHeap != GCPhys)
+        {
+            pVM->pdm.s.GCPhysVMMDevHeap = GCPhys;
+            if (pVM->pdm.s.pfnVMMDevHeapNotify)
+                pVM->pdm.s.pfnVMMDevHeapNotify(pVM, pvHeap, GCPhys);
+        }
+    }
+
+    LogFlow(("pdmR3DevHlp_RegisterVMMDevHeap: caller='%s'/%d: returns %Rrc\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, VINF_SUCCESS));
+    return VINF_SUCCESS;
+}
+
+
+/**
+ * @interface_method_impl{PDMDEVHLPR3,pfnFirmwareRegister}
+ */
+static DECLCALLBACK(int) pdmR3DevHlp_FirmwareRegister(PPDMDEVINS pDevIns, PCPDMFWREG pFwReg, PCPDMFWHLPR3 *ppFwHlp)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    VM_ASSERT_EMT(pDevIns->Internal.s.pVMR3);
+    LogFlow(("pdmR3DevHlp_FirmwareRegister: caller='%s'/%d: pFWReg=%p:{.u32Version=%#x, .pfnIsHardReset=%p, .u32TheEnd=%#x} ppFwHlp=%p\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, pFwReg, pFwReg->u32Version, pFwReg->pfnIsHardReset, pFwReg->u32TheEnd, ppFwHlp));
+
+    /*
+     * Validate input.
+     */
+    if (pFwReg->u32Version != PDM_FWREG_VERSION)
+    {
+        AssertMsgFailed(("u32Version=%#x expected %#x\n", pFwReg->u32Version, PDM_FWREG_VERSION));
+        LogFlow(("pdmR3DevHlp_FirmwareRegister: caller='%s'/%d: returns %Rrc (version)\n",
+                 pDevIns->pReg->szName, pDevIns->iInstance, VERR_INVALID_PARAMETER));
+        return VERR_INVALID_PARAMETER;
+    }
+    if (!pFwReg->pfnIsHardReset)
+    {
+        Assert(pFwReg->pfnIsHardReset);
+        LogFlow(("pdmR3DevHlp_FirmwareRegister: caller='%s'/%d: returns %Rrc (callbacks)\n",
+                 pDevIns->pReg->szName, pDevIns->iInstance, VERR_INVALID_PARAMETER));
+        return VERR_INVALID_PARAMETER;
+    }
+
+    if (!ppFwHlp)
+    {
+        Assert(ppFwHlp);
+        LogFlow(("pdmR3DevHlp_FirmwareRegister: caller='%s'/%d: returns %Rrc (ppFwHlp)\n",
+                 pDevIns->pReg->szName, pDevIns->iInstance, VERR_INVALID_PARAMETER));
+        return VERR_INVALID_PARAMETER;
+    }
+
+    /*
+     * Only one DMA device.
+     */
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    if (pVM->pdm.s.pFirmware)
+    {
+        AssertMsgFailed(("Only one firmware device is supported!\n"));
+        LogFlow(("pdmR3DevHlp_FirmwareRegister: caller='%s'/%d: returns %Rrc\n",
+                 pDevIns->pReg->szName, pDevIns->iInstance, VERR_INVALID_PARAMETER));
+        return VERR_INVALID_PARAMETER;
+    }
+
+    /*
+     * Allocate and initialize pci bus structure.
+     */
+    int rc = VINF_SUCCESS;
+    PPDMFW pFirmware = (PPDMFW)MMR3HeapAlloc(pDevIns->Internal.s.pVMR3, MM_TAG_PDM_DEVICE, sizeof(*pFirmware));
+    if (pFirmware)
+    {
+        pFirmware->pDevIns   = pDevIns;
+        pFirmware->Reg       = *pFwReg;
+        pVM->pdm.s.pFirmware = pFirmware;
+
+        /* set the helper pointer. */
+        *ppFwHlp = &g_pdmR3DevFirmwareHlp;
+        Log(("PDM: Registered firmware device '%s'/%d pDevIns=%p\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, pDevIns));
+    }
+    else
+        rc = VERR_NO_MEMORY;
+
+    LogFlow(("pdmR3DevHlp_FirmwareRegister: caller='%s'/%d: returns %Rrc\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, rc));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnVMReset} */
+static DECLCALLBACK(int) pdmR3DevHlp_VMReset(PPDMDEVINS pDevIns, uint32_t fFlags)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    VM_ASSERT_EMT(pVM);
+    LogFlow(("pdmR3DevHlp_VMReset: caller='%s'/%d: fFlags=%#x VM_FF_RESET %d -> 1\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, fFlags, VM_FF_IS_SET(pVM, VM_FF_RESET)));
+
+    /*
+     * We postpone this operation because we're likely to be inside a I/O instruction
+     * and the EIP will be updated when we return.
+     * We still return VINF_EM_RESET to break out of any execution loops and force FF evaluation.
+     */
+    bool fHaltOnReset;
+    int rc = CFGMR3QueryBool(CFGMR3GetChild(CFGMR3GetRoot(pVM), "PDM"), "HaltOnReset", &fHaltOnReset);
+    if (RT_SUCCESS(rc) && fHaltOnReset)
+    {
+        Log(("pdmR3DevHlp_VMReset: Halt On Reset!\n"));
+        rc = VINF_EM_HALT;
+    }
+    else
+    {
+        pVM->pdm.s.fResetFlags = fFlags;
+        VM_FF_SET(pVM, VM_FF_RESET);
+        rc = VINF_EM_RESET;
+    }
+
+    LogFlow(("pdmR3DevHlp_VMReset: caller='%s'/%d: returns %Rrc\n", pDevIns->pReg->szName, pDevIns->iInstance, rc));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnVMSuspend} */
+static DECLCALLBACK(int) pdmR3DevHlp_VMSuspend(PPDMDEVINS pDevIns)
+{
+    int rc;
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    VM_ASSERT_EMT(pVM);
+    LogFlow(("pdmR3DevHlp_VMSuspend: caller='%s'/%d:\n",
+             pDevIns->pReg->szName, pDevIns->iInstance));
+
+    /** @todo Always take the SMP path - fewer code paths. */
+    if (pVM->cCpus > 1)
+    {
+        /* We own the IOM lock here and could cause a deadlock by waiting for a VCPU that is blocking on the IOM lock. */
+        rc = VMR3ReqCallNoWait(pVM, VMCPUID_ANY_QUEUE, (PFNRT)VMR3Suspend, 2, pVM->pUVM, VMSUSPENDREASON_VM);
+        AssertRC(rc);
+        rc = VINF_EM_SUSPEND;
+    }
+    else
+        rc = VMR3Suspend(pVM->pUVM, VMSUSPENDREASON_VM);
+
+    LogFlow(("pdmR3DevHlp_VMSuspend: caller='%s'/%d: returns %Rrc\n", pDevIns->pReg->szName, pDevIns->iInstance, rc));
+    return rc;
+}
+
+
+/**
+ * Worker for pdmR3DevHlp_VMSuspendSaveAndPowerOff that is invoked via a queued
+ * EMT request to avoid deadlocks.
+ *
+ * @returns VBox status code fit for scheduling.
+ * @param   pVM                 The cross context VM structure.
+ * @param   pDevIns             The device that triggered this action.
+ */
+static DECLCALLBACK(int) pdmR3DevHlp_VMSuspendSaveAndPowerOffWorker(PVM pVM, PPDMDEVINS pDevIns)
+{
+    /*
+     * Suspend the VM first then do the saving.
+     */
+    int rc = VMR3Suspend(pVM->pUVM, VMSUSPENDREASON_VM);
+    if (RT_SUCCESS(rc))
+    {
+        PUVM pUVM = pVM->pUVM;
+        rc = pUVM->pVmm2UserMethods->pfnSaveState(pVM->pUVM->pVmm2UserMethods, pUVM);
+
+        /*
+         * On success, power off the VM, on failure we'll leave it suspended.
+         */
+        if (RT_SUCCESS(rc))
+        {
+            rc = VMR3PowerOff(pVM->pUVM);
+            if (RT_FAILURE(rc))
+                LogRel(("%s/SSP: VMR3PowerOff failed: %Rrc\n", pDevIns->pReg->szName, rc));
+        }
+        else
+            LogRel(("%s/SSP: pfnSaveState failed: %Rrc\n", pDevIns->pReg->szName, rc));
+    }
+    else
+        LogRel(("%s/SSP: Suspend failed: %Rrc\n", pDevIns->pReg->szName, rc));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnVMSuspendSaveAndPowerOff} */
+static DECLCALLBACK(int) pdmR3DevHlp_VMSuspendSaveAndPowerOff(PPDMDEVINS pDevIns)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    VM_ASSERT_EMT(pVM);
+    LogFlow(("pdmR3DevHlp_VMSuspendSaveAndPowerOff: caller='%s'/%d:\n",
+             pDevIns->pReg->szName, pDevIns->iInstance));
+
+    int rc;
+    if (   pVM->pUVM->pVmm2UserMethods
+        && pVM->pUVM->pVmm2UserMethods->pfnSaveState)
+    {
+        rc = VMR3ReqCallNoWait(pVM, VMCPUID_ANY_QUEUE, (PFNRT)pdmR3DevHlp_VMSuspendSaveAndPowerOffWorker, 2, pVM, pDevIns);
+        if (RT_SUCCESS(rc))
+        {
+            LogRel(("%s: Suspending, Saving and Powering Off the VM\n", pDevIns->pReg->szName));
+            rc = VINF_EM_SUSPEND;
+        }
+    }
+    else
+        rc = VERR_NOT_SUPPORTED;
+
+    LogFlow(("pdmR3DevHlp_VMSuspendSaveAndPowerOff: caller='%s'/%d: returns %Rrc\n", pDevIns->pReg->szName, pDevIns->iInstance, rc));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnVMPowerOff} */
+static DECLCALLBACK(int) pdmR3DevHlp_VMPowerOff(PPDMDEVINS pDevIns)
+{
+    int rc;
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    PVM pVM = pDevIns->Internal.s.pVMR3;
+    VM_ASSERT_EMT(pVM);
+    LogFlow(("pdmR3DevHlp_VMPowerOff: caller='%s'/%d:\n",
+             pDevIns->pReg->szName, pDevIns->iInstance));
+
+    /** @todo Always take the SMP path - fewer code paths. */
+    if (pVM->cCpus > 1)
+    {
+        /* We might be holding locks here and could cause a deadlock since
+           VMR3PowerOff rendezvous with the other CPUs. */
+        rc = VMR3ReqCallNoWait(pVM, VMCPUID_ANY_QUEUE, (PFNRT)VMR3PowerOff, 1, pVM->pUVM);
+        AssertRC(rc);
+        /* Set the VCPU state to stopped here as well to make sure no
+           inconsistency with the EM state occurs. */
+        VMCPU_SET_STATE(VMMGetCpu(pVM), VMCPUSTATE_STOPPED);
+        rc = VINF_EM_OFF;
+    }
+    else
+        rc = VMR3PowerOff(pVM->pUVM);
+
+    LogFlow(("pdmR3DevHlp_VMPowerOff: caller='%s'/%d: returns %Rrc\n", pDevIns->pReg->szName, pDevIns->iInstance, rc));
+    return rc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnA20IsEnabled} */
+static DECLCALLBACK(bool) pdmR3DevHlp_A20IsEnabled(PPDMDEVINS pDevIns)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    VM_ASSERT_EMT(pDevIns->Internal.s.pVMR3);
+
+    bool fRc = PGMPhysIsA20Enabled(VMMGetCpu(pDevIns->Internal.s.pVMR3));
+
+    LogFlow(("pdmR3DevHlp_A20IsEnabled: caller='%s'/%d: returns %d\n", pDevIns->pReg->szName, pDevIns->iInstance, fRc));
+    return fRc;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnA20Set} */
+static DECLCALLBACK(void) pdmR3DevHlp_A20Set(PPDMDEVINS pDevIns, bool fEnable)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    VM_ASSERT_EMT(pDevIns->Internal.s.pVMR3);
+    LogFlow(("pdmR3DevHlp_A20Set: caller='%s'/%d: fEnable=%d\n", pDevIns->pReg->szName, pDevIns->iInstance, fEnable));
+    PGMR3PhysSetA20(VMMGetCpu(pDevIns->Internal.s.pVMR3), fEnable);
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnGetCpuId} */
+static DECLCALLBACK(void) pdmR3DevHlp_GetCpuId(PPDMDEVINS pDevIns, uint32_t iLeaf,
+                                               uint32_t *pEax, uint32_t *pEbx, uint32_t *pEcx, uint32_t *pEdx)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    VM_ASSERT_EMT(pDevIns->Internal.s.pVMR3);
+
+    LogFlow(("pdmR3DevHlp_GetCpuId: caller='%s'/%d: iLeaf=%d pEax=%p pEbx=%p pEcx=%p pEdx=%p\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, iLeaf, pEax, pEbx, pEcx, pEdx));
+    AssertPtr(pEax); AssertPtr(pEbx); AssertPtr(pEcx); AssertPtr(pEdx);
+
+    CPUMGetGuestCpuId(VMMGetCpu(pDevIns->Internal.s.pVMR3), iLeaf, 0 /*iSubLeaf*/, pEax, pEbx, pEcx, pEdx);
+
+    LogFlow(("pdmR3DevHlp_GetCpuId: caller='%s'/%d: returns void - *pEax=%#x *pEbx=%#x *pEcx=%#x *pEdx=%#x\n",
+             pDevIns->pReg->szName, pDevIns->iInstance, *pEax, *pEbx, *pEcx, *pEdx));
+}
+
+
+/**
+ * The device helper structure for trusted devices.
+ */
+const PDMDEVHLPR3 g_pdmR3DevHlpTrusted =
+{
+    PDM_DEVHLPR3_VERSION,
+    pdmR3DevHlp_IoPortCreateEx,
+    pdmR3DevHlp_IoPortMap,
+    pdmR3DevHlp_IoPortUnmap,
+    pdmR3DevHlp_IoPortGetMappingAddress,
+    pdmR3DevHlp_MmioCreateEx,
+    pdmR3DevHlp_MmioMap,
+    pdmR3DevHlp_MmioUnmap,
+    pdmR3DevHlp_MmioReduce,
+    pdmR3DevHlp_MmioGetMappingAddress,
+    pdmR3DevHlp_Mmio2Create,
+    pdmR3DevHlp_Mmio2Destroy,
+    pdmR3DevHlp_Mmio2Map,
+    pdmR3DevHlp_Mmio2Unmap,
+    pdmR3DevHlp_Mmio2Reduce,
+    pdmR3DevHlp_Mmio2GetMappingAddress,
+    pdmR3DevHlp_Mmio2ChangeRegionNo,
+    pdmR3DevHlp_ROMRegister,
+    pdmR3DevHlp_ROMProtectShadow,
+    pdmR3DevHlp_SSMRegister,
+    SSMR3PutStruct,
+    SSMR3PutStructEx,
+    SSMR3PutBool,
+    SSMR3PutU8,
+    SSMR3PutS8,
+    SSMR3PutU16,
+    SSMR3PutS16,
+    SSMR3PutU32,
+    SSMR3PutS32,
+    SSMR3PutU64,
+    SSMR3PutS64,
+    SSMR3PutU128,
+    SSMR3PutS128,
+    SSMR3PutUInt,
+    SSMR3PutSInt,
+    SSMR3PutGCUInt,
+    SSMR3PutGCUIntReg,
+    SSMR3PutGCPhys32,
+    SSMR3PutGCPhys64,
+    SSMR3PutGCPhys,
+    SSMR3PutGCPtr,
+    SSMR3PutGCUIntPtr,
+    SSMR3PutRCPtr,
+    SSMR3PutIOPort,
+    SSMR3PutSel,
+    SSMR3PutMem,
+    SSMR3PutStrZ,
+    SSMR3GetStruct,
+    SSMR3GetStructEx,
+    SSMR3GetBool,
+    SSMR3GetBoolV,
+    SSMR3GetU8,
+    SSMR3GetU8V,
+    SSMR3GetS8,
+    SSMR3GetS8V,
+    SSMR3GetU16,
+    SSMR3GetU16V,
+    SSMR3GetS16,
+    SSMR3GetS16V,
+    SSMR3GetU32,
+    SSMR3GetU32V,
+    SSMR3GetS32,
+    SSMR3GetS32V,
+    SSMR3GetU64,
+    SSMR3GetU64V,
+    SSMR3GetS64,
+    SSMR3GetS64V,
+    SSMR3GetU128,
+    SSMR3GetU128V,
+    SSMR3GetS128,
+    SSMR3GetS128V,
+    SSMR3GetGCPhys32,
+    SSMR3GetGCPhys32V,
+    SSMR3GetGCPhys64,
+    SSMR3GetGCPhys64V,
+    SSMR3GetGCPhys,
+    SSMR3GetGCPhysV,
+    SSMR3GetUInt,
+    SSMR3GetSInt,
+    SSMR3GetGCUInt,
+    SSMR3GetGCUIntReg,
+    SSMR3GetGCPtr,
+    SSMR3GetGCUIntPtr,
+    SSMR3GetRCPtr,
+    SSMR3GetIOPort,
+    SSMR3GetSel,
+    SSMR3GetMem,
+    SSMR3GetStrZ,
+    SSMR3GetStrZEx,
+    SSMR3Skip,
+    SSMR3SkipToEndOfUnit,
+    SSMR3SetLoadError,
+    SSMR3SetLoadErrorV,
+    SSMR3SetCfgError,
+    SSMR3SetCfgErrorV,
+    SSMR3HandleGetStatus,
+    SSMR3HandleGetAfter,
+    SSMR3HandleIsLiveSave,
+    SSMR3HandleMaxDowntime,
+    SSMR3HandleHostBits,
+    SSMR3HandleRevision,
+    SSMR3HandleVersion,
+    SSMR3HandleHostOSAndArch,
+    pdmR3DevHlp_TMTimerCreate,
+    pdmR3DevHlp_TimerCreate,
+    pdmR3DevHlp_TimerToPtr,
+    pdmR3DevHlp_TimerFromMicro,
+    pdmR3DevHlp_TimerFromMilli,
+    pdmR3DevHlp_TimerFromNano,
+    pdmR3DevHlp_TimerGet,
+    pdmR3DevHlp_TimerGetFreq,
+    pdmR3DevHlp_TimerGetNano,
+    pdmR3DevHlp_TimerIsActive,
+    pdmR3DevHlp_TimerIsLockOwner,
+    pdmR3DevHlp_TimerLockClock,
+    pdmR3DevHlp_TimerLockClock2,
+    pdmR3DevHlp_TimerSet,
+    pdmR3DevHlp_TimerSetFrequencyHint,
+    pdmR3DevHlp_TimerSetMicro,
+    pdmR3DevHlp_TimerSetMillies,
+    pdmR3DevHlp_TimerSetNano,
+    pdmR3DevHlp_TimerSetRelative,
+    pdmR3DevHlp_TimerStop,
+    pdmR3DevHlp_TimerUnlockClock,
+    pdmR3DevHlp_TimerUnlockClock2,
+    pdmR3DevHlp_TimerSetCritSect,
+    pdmR3DevHlp_TimerSave,
+    pdmR3DevHlp_TimerLoad,
+    pdmR3DevHlp_TimerDestroy,
+    TMR3TimerSkip,
+    pdmR3DevHlp_TMUtcNow,
+    CFGMR3Exists,
+    CFGMR3QueryType,
+    CFGMR3QuerySize,
+    CFGMR3QueryInteger,
+    CFGMR3QueryIntegerDef,
+    CFGMR3QueryString,
+    CFGMR3QueryStringDef,
+    CFGMR3QueryBytes,
+    CFGMR3QueryU64,
+    CFGMR3QueryU64Def,
+    CFGMR3QueryS64,
+    CFGMR3QueryS64Def,
+    CFGMR3QueryU32,
+    CFGMR3QueryU32Def,
+    CFGMR3QueryS32,
+    CFGMR3QueryS32Def,
+    CFGMR3QueryU16,
+    CFGMR3QueryU16Def,
+    CFGMR3QueryS16,
+    CFGMR3QueryS16Def,
+    CFGMR3QueryU8,
+    CFGMR3QueryU8Def,
+    CFGMR3QueryS8,
+    CFGMR3QueryS8Def,
+    CFGMR3QueryBool,
+    CFGMR3QueryBoolDef,
+    CFGMR3QueryPort,
+    CFGMR3QueryPortDef,
+    CFGMR3QueryUInt,
+    CFGMR3QueryUIntDef,
+    CFGMR3QuerySInt,
+    CFGMR3QuerySIntDef,
+    CFGMR3QueryPtr,
+    CFGMR3QueryPtrDef,
+    CFGMR3QueryGCPtr,
+    CFGMR3QueryGCPtrDef,
+    CFGMR3QueryGCPtrU,
+    CFGMR3QueryGCPtrUDef,
+    CFGMR3QueryGCPtrS,
+    CFGMR3QueryGCPtrSDef,
+    CFGMR3QueryStringAlloc,
+    CFGMR3QueryStringAllocDef,
+    CFGMR3GetParent,
+    CFGMR3GetChild,
+    CFGMR3GetChildF,
+    CFGMR3GetChildFV,
+    CFGMR3GetFirstChild,
+    CFGMR3GetNextChild,
+    CFGMR3GetName,
+    CFGMR3GetNameLen,
+    CFGMR3AreChildrenValid,
+    CFGMR3GetFirstValue,
+    CFGMR3GetNextValue,
+    CFGMR3GetValueName,
+    CFGMR3GetValueNameLen,
+    CFGMR3GetValueType,
+    CFGMR3AreValuesValid,
+    CFGMR3ValidateConfig,
+    pdmR3DevHlp_PhysRead,
+    pdmR3DevHlp_PhysWrite,
+    pdmR3DevHlp_PhysGCPhys2CCPtr,
+    pdmR3DevHlp_PhysGCPhys2CCPtrReadOnly,
+    pdmR3DevHlp_PhysReleasePageMappingLock,
+    pdmR3DevHlp_PhysReadGCVirt,
+    pdmR3DevHlp_PhysWriteGCVirt,
+    pdmR3DevHlp_PhysGCPtr2GCPhys,
+    pdmR3DevHlp_MMHeapAlloc,
+    pdmR3DevHlp_MMHeapAllocZ,
+    pdmR3DevHlp_MMHeapFree,
+    pdmR3DevHlp_VMState,
+    pdmR3DevHlp_VMTeleportedAndNotFullyResumedYet,
+    pdmR3DevHlp_VMSetError,
+    pdmR3DevHlp_VMSetErrorV,
+    pdmR3DevHlp_VMSetRuntimeError,
+    pdmR3DevHlp_VMSetRuntimeErrorV,
+    pdmR3DevHlp_DBGFStopV,
+    pdmR3DevHlp_DBGFInfoRegister,
+    pdmR3DevHlp_DBGFInfoRegisterArgv,
+    pdmR3DevHlp_DBGFRegRegister,
+    pdmR3DevHlp_DBGFTraceBuf,
+    pdmR3DevHlp_STAMRegister,
+    pdmR3DevHlp_STAMRegisterV,
+    pdmR3DevHlp_PCIRegister,
+    pdmR3DevHlp_PCIRegisterMsi,
+    pdmR3DevHlp_PCIIORegionRegister,
+    pdmR3DevHlp_PCIInterceptConfigAccesses,
+    pdmR3DevHlp_PCIConfigWrite,
+    pdmR3DevHlp_PCIConfigRead,
+    pdmR3DevHlp_PCIPhysRead,
+    pdmR3DevHlp_PCIPhysWrite,
+    pdmR3DevHlp_PCISetIrq,
+    pdmR3DevHlp_PCISetIrqNoWait,
+    pdmR3DevHlp_ISASetIrq,
+    pdmR3DevHlp_ISASetIrqNoWait,
+    pdmR3DevHlp_IoApicSendMsi,
+    pdmR3DevHlp_DriverAttach,
+    pdmR3DevHlp_DriverDetach,
+    pdmR3DevHlp_DriverReconfigure,
+    pdmR3DevHlp_QueueCreatePtr,
+    pdmR3DevHlp_QueueCreate,
+    pdmR3DevHlp_QueueToPtr,
+    pdmR3DevHlp_QueueAlloc,
+    pdmR3DevHlp_QueueInsert,
+    pdmR3DevHlp_QueueInsertEx,
+    pdmR3DevHlp_QueueFlushIfNecessary,
+    pdmR3DevHlp_TaskCreate,
+    pdmR3DevHlp_TaskTrigger,
+    pdmR3DevHlp_SUPSemEventCreate,
+    pdmR3DevHlp_SUPSemEventClose,
+    pdmR3DevHlp_SUPSemEventSignal,
+    pdmR3DevHlp_SUPSemEventWaitNoResume,
+    pdmR3DevHlp_SUPSemEventWaitNsAbsIntr,
+    pdmR3DevHlp_SUPSemEventWaitNsRelIntr,
+    pdmR3DevHlp_SUPSemEventGetResolution,
+    pdmR3DevHlp_SUPSemEventMultiCreate,
+    pdmR3DevHlp_SUPSemEventMultiClose,
+    pdmR3DevHlp_SUPSemEventMultiSignal,
+    pdmR3DevHlp_SUPSemEventMultiReset,
+    pdmR3DevHlp_SUPSemEventMultiWaitNoResume,
+    pdmR3DevHlp_SUPSemEventMultiWaitNsAbsIntr,
+    pdmR3DevHlp_SUPSemEventMultiWaitNsRelIntr,
+    pdmR3DevHlp_SUPSemEventMultiGetResolution,
+    pdmR3DevHlp_CritSectInit,
+    pdmR3DevHlp_CritSectGetNop,
+    pdmR3DevHlp_CritSectGetNopR0,
+    pdmR3DevHlp_CritSectGetNopRC,
+    pdmR3DevHlp_SetDeviceCritSect,
+    pdmR3DevHlp_CritSectYield,
+    pdmR3DevHlp_CritSectEnter,
+    pdmR3DevHlp_CritSectEnterDebug,
+    pdmR3DevHlp_CritSectTryEnter,
+    pdmR3DevHlp_CritSectTryEnterDebug,
+    pdmR3DevHlp_CritSectLeave,
+    pdmR3DevHlp_CritSectIsOwner,
+    pdmR3DevHlp_CritSectIsInitialized,
+    pdmR3DevHlp_CritSectHasWaiters,
+    pdmR3DevHlp_CritSectGetRecursion,
+    pdmR3DevHlp_CritSectScheduleExitEvent,
+    pdmR3DevHlp_CritSectDelete,
+    pdmR3DevHlp_ThreadCreate,
+    PDMR3ThreadDestroy,
+    PDMR3ThreadIAmSuspending,
+    PDMR3ThreadIAmRunning,
+    PDMR3ThreadSleep,
+    PDMR3ThreadSuspend,
+    PDMR3ThreadResume,
+    pdmR3DevHlp_SetAsyncNotification,
+    pdmR3DevHlp_AsyncNotificationCompleted,
+    pdmR3DevHlp_RTCRegister,
+    pdmR3DevHlp_PCIBusRegister,
+    pdmR3DevHlp_PICRegister,
+    pdmR3DevHlp_ApicRegister,
+    pdmR3DevHlp_IoApicRegister,
+    pdmR3DevHlp_HpetRegister,
+    pdmR3DevHlp_PciRawRegister,
+    pdmR3DevHlp_DMACRegister,
+    pdmR3DevHlp_DMARegister,
+    pdmR3DevHlp_DMAReadMemory,
+    pdmR3DevHlp_DMAWriteMemory,
+    pdmR3DevHlp_DMASetDREQ,
+    pdmR3DevHlp_DMAGetChannelMode,
+    pdmR3DevHlp_DMASchedule,
+    pdmR3DevHlp_CMOSWrite,
+    pdmR3DevHlp_CMOSRead,
+    pdmR3DevHlp_AssertEMT,
+    pdmR3DevHlp_AssertOther,
+    pdmR3DevHlp_LdrGetRCInterfaceSymbols,
+    pdmR3DevHlp_LdrGetR0InterfaceSymbols,
+    pdmR3DevHlp_CallR0,
+    pdmR3DevHlp_VMGetSuspendReason,
+    pdmR3DevHlp_VMGetResumeReason,
+    pdmR3DevHlp_PhysBulkGCPhys2CCPtr,
+    pdmR3DevHlp_PhysBulkGCPhys2CCPtrReadOnly,
+    pdmR3DevHlp_PhysBulkReleasePageMappingLocks,
+    0,
+    0,
+    0,
+    0,
+    0,
+    0,
+    0,
+    0,
+    0,
+    0,
+    pdmR3DevHlp_GetUVM,
+    pdmR3DevHlp_GetVM,
+    pdmR3DevHlp_GetVMCPU,
+    pdmR3DevHlp_GetCurrentCpuId,
+    pdmR3DevHlp_RegisterVMMDevHeap,
+    pdmR3DevHlp_FirmwareRegister,
+    pdmR3DevHlp_VMReset,
+    pdmR3DevHlp_VMSuspend,
+    pdmR3DevHlp_VMSuspendSaveAndPowerOff,
+    pdmR3DevHlp_VMPowerOff,
+    pdmR3DevHlp_A20IsEnabled,
+    pdmR3DevHlp_A20Set,
+    pdmR3DevHlp_GetCpuId,
+    pdmR3DevHlp_TMTimeVirtGet,
+    pdmR3DevHlp_TMTimeVirtGetFreq,
+    pdmR3DevHlp_TMTimeVirtGetNano,
+    pdmR3DevHlp_GetSupDrvSession,
+    pdmR3DevHlp_QueryGenericUserObject,
+    PDM_DEVHLPR3_VERSION /* the end */
+};
+
+
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnGetUVM} */
+static DECLCALLBACK(PUVM) pdmR3DevHlp_Untrusted_GetUVM(PPDMDEVINS pDevIns)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    AssertReleaseMsgFailed(("Untrusted device called trusted helper! '%s'/%d\n", pDevIns->pReg->szName, pDevIns->iInstance));
+    return NULL;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnGetVM} */
+static DECLCALLBACK(PVM) pdmR3DevHlp_Untrusted_GetVM(PPDMDEVINS pDevIns)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    AssertReleaseMsgFailed(("Untrusted device called trusted helper! '%s'/%d\n", pDevIns->pReg->szName, pDevIns->iInstance));
+    return NULL;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnGetVMCPU} */
+static DECLCALLBACK(PVMCPU) pdmR3DevHlp_Untrusted_GetVMCPU(PPDMDEVINS pDevIns)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    AssertReleaseMsgFailed(("Untrusted device called trusted helper! '%s'/%d\n", pDevIns->pReg->szName, pDevIns->iInstance));
+    return NULL;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnGetCurrentCpuId} */
+static DECLCALLBACK(VMCPUID) pdmR3DevHlp_Untrusted_GetCurrentCpuId(PPDMDEVINS pDevIns)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    AssertReleaseMsgFailed(("Untrusted device called trusted helper! '%s'/%d\n", pDevIns->pReg->szName, pDevIns->iInstance));
+    return NIL_VMCPUID;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnRegisterVMMDevHeap} */
+static DECLCALLBACK(int) pdmR3DevHlp_Untrusted_RegisterVMMDevHeap(PPDMDEVINS pDevIns, RTGCPHYS GCPhys,
+                                                                  RTR3PTR pvHeap, unsigned cbHeap)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    NOREF(GCPhys); NOREF(pvHeap); NOREF(cbHeap);
+    AssertReleaseMsgFailed(("Untrusted device called trusted helper! '%s'/%d\n", pDevIns->pReg->szName, pDevIns->iInstance));
+    return VERR_ACCESS_DENIED;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnFirmwareRegister} */
+static DECLCALLBACK(int) pdmR3DevHlp_Untrusted_FirmwareRegister(PPDMDEVINS pDevIns, PCPDMFWREG pFwReg, PCPDMFWHLPR3 *ppFwHlp)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    NOREF(pFwReg); NOREF(ppFwHlp);
+    AssertReleaseMsgFailed(("Untrusted device called trusted helper! '%s'/%d\n", pDevIns->pReg->szName, pDevIns->iInstance));
+    return VERR_ACCESS_DENIED;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnVMReset} */
+static DECLCALLBACK(int) pdmR3DevHlp_Untrusted_VMReset(PPDMDEVINS pDevIns, uint32_t fFlags)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns); NOREF(fFlags);
+    AssertReleaseMsgFailed(("Untrusted device called trusted helper! '%s'/%d\n", pDevIns->pReg->szName, pDevIns->iInstance));
+    return VERR_ACCESS_DENIED;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnVMSuspend} */
+static DECLCALLBACK(int) pdmR3DevHlp_Untrusted_VMSuspend(PPDMDEVINS pDevIns)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    AssertReleaseMsgFailed(("Untrusted device called trusted helper! '%s'/%d\n", pDevIns->pReg->szName, pDevIns->iInstance));
+    return VERR_ACCESS_DENIED;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnVMSuspendSaveAndPowerOff} */
+static DECLCALLBACK(int) pdmR3DevHlp_Untrusted_VMSuspendSaveAndPowerOff(PPDMDEVINS pDevIns)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    AssertReleaseMsgFailed(("Untrusted device called trusted helper! '%s'/%d\n", pDevIns->pReg->szName, pDevIns->iInstance));
+    return VERR_ACCESS_DENIED;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnVMPowerOff} */
+static DECLCALLBACK(int) pdmR3DevHlp_Untrusted_VMPowerOff(PPDMDEVINS pDevIns)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    AssertReleaseMsgFailed(("Untrusted device called trusted helper! '%s'/%d\n", pDevIns->pReg->szName, pDevIns->iInstance));
+    return VERR_ACCESS_DENIED;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnA20IsEnabled} */
+static DECLCALLBACK(bool) pdmR3DevHlp_Untrusted_A20IsEnabled(PPDMDEVINS pDevIns)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    AssertReleaseMsgFailed(("Untrusted device called trusted helper! '%s'/%d\n", pDevIns->pReg->szName, pDevIns->iInstance));
+    return false;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnA20Set} */
+static DECLCALLBACK(void) pdmR3DevHlp_Untrusted_A20Set(PPDMDEVINS pDevIns, bool fEnable)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    AssertReleaseMsgFailed(("Untrusted device called trusted helper! '%s'/%d\n", pDevIns->pReg->szName, pDevIns->iInstance));
+    NOREF(fEnable);
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnGetCpuId} */
+static DECLCALLBACK(void) pdmR3DevHlp_Untrusted_GetCpuId(PPDMDEVINS pDevIns, uint32_t iLeaf,
+                                                         uint32_t *pEax, uint32_t *pEbx, uint32_t *pEcx, uint32_t *pEdx)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    NOREF(iLeaf); NOREF(pEax); NOREF(pEbx); NOREF(pEcx); NOREF(pEdx);
+    AssertReleaseMsgFailed(("Untrusted device called trusted helper! '%s'/%d\n", pDevIns->pReg->szName, pDevIns->iInstance));
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnGetSupDrvSession} */
+static DECLCALLBACK(PSUPDRVSESSION) pdmR3DevHlp_Untrusted_GetSupDrvSession(PPDMDEVINS pDevIns)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    AssertReleaseMsgFailed(("Untrusted device called trusted helper! '%s'/%d\n", pDevIns->pReg->szName, pDevIns->iInstance));
+    return (PSUPDRVSESSION)0;
+}
+
+
+/** @interface_method_impl{PDMDEVHLPR3,pfnQueryGenericUserObject} */
+static DECLCALLBACK(void *) pdmR3DevHlp_Untrusted_QueryGenericUserObject(PPDMDEVINS pDevIns, PCRTUUID pUuid)
+{
+    PDMDEV_ASSERT_DEVINS(pDevIns);
+    AssertReleaseMsgFailed(("Untrusted device called trusted helper! '%s'/%d %RTuuid\n",
+                            pDevIns->pReg->szName, pDevIns->iInstance, pUuid));
+    return NULL;
+}
+
+
+/**
+ * The device helper structure for non-trusted devices.
+ */
+const PDMDEVHLPR3 g_pdmR3DevHlpUnTrusted =
+{
+    PDM_DEVHLPR3_VERSION,
+    pdmR3DevHlp_IoPortCreateEx,
+    pdmR3DevHlp_IoPortMap,
+    pdmR3DevHlp_IoPortUnmap,
+    pdmR3DevHlp_IoPortGetMappingAddress,
+    pdmR3DevHlp_MmioCreateEx,
+    pdmR3DevHlp_MmioMap,
+    pdmR3DevHlp_MmioUnmap,
+    pdmR3DevHlp_MmioReduce,
+    pdmR3DevHlp_MmioGetMappingAddress,
+    pdmR3DevHlp_Mmio2Create,
+    pdmR3DevHlp_Mmio2Destroy,
+    pdmR3DevHlp_Mmio2Map,
+    pdmR3DevHlp_Mmio2Unmap,
+    pdmR3DevHlp_Mmio2Reduce,
+    pdmR3DevHlp_Mmio2GetMappingAddress,
+    pdmR3DevHlp_Mmio2ChangeRegionNo,
+    pdmR3DevHlp_ROMRegister,
+    pdmR3DevHlp_ROMProtectShadow,
+    pdmR3DevHlp_SSMRegister,
+    SSMR3PutStruct,
+    SSMR3PutStructEx,
+    SSMR3PutBool,
+    SSMR3PutU8,
+    SSMR3PutS8,
+    SSMR3PutU16,
+    SSMR3PutS16,
+    SSMR3PutU32,
+    SSMR3PutS32,
+    SSMR3PutU64,
+    SSMR3PutS64,
+    SSMR3PutU128,
+    SSMR3PutS128,
+    SSMR3PutUInt,
+    SSMR3PutSInt,
+    SSMR3PutGCUInt,
+    SSMR3PutGCUIntReg,
+    SSMR3PutGCPhys32,
+    SSMR3PutGCPhys64,
+    SSMR3PutGCPhys,
+    SSMR3PutGCPtr,
+    SSMR3PutGCUIntPtr,
+    SSMR3PutRCPtr,
+    SSMR3PutIOPort,
+    SSMR3PutSel,
+    SSMR3PutMem,
+    SSMR3PutStrZ,
+    SSMR3GetStruct,
+    SSMR3GetStructEx,
+    SSMR3GetBool,
+    SSMR3GetBoolV,
+    SSMR3GetU8,
+    SSMR3GetU8V,
+    SSMR3GetS8,
+    SSMR3GetS8V,
+    SSMR3GetU16,
+    SSMR3GetU16V,
+    SSMR3GetS16,
+    SSMR3GetS16V,
+    SSMR3GetU32,
+    SSMR3GetU32V,
+    SSMR3GetS32,
+    SSMR3GetS32V,
+    SSMR3GetU64,
+    SSMR3GetU64V,
+    SSMR3GetS64,
+    SSMR3GetS64V,
+    SSMR3GetU128,
+    SSMR3GetU128V,
+    SSMR3GetS128,
+    SSMR3GetS128V,
+    SSMR3GetGCPhys32,
+    SSMR3GetGCPhys32V,
+    SSMR3GetGCPhys64,
+    SSMR3GetGCPhys64V,
+    SSMR3GetGCPhys,
+    SSMR3GetGCPhysV,
+    SSMR3GetUInt,
+    SSMR3GetSInt,
+    SSMR3GetGCUInt,
+    SSMR3GetGCUIntReg,
+    SSMR3GetGCPtr,
+    SSMR3GetGCUIntPtr,
+    SSMR3GetRCPtr,
+    SSMR3GetIOPort,
+    SSMR3GetSel,
+    SSMR3GetMem,
+    SSMR3GetStrZ,
+    SSMR3GetStrZEx,
+    SSMR3Skip,
+    SSMR3SkipToEndOfUnit,
+    SSMR3SetLoadError,
+    SSMR3SetLoadErrorV,
+    SSMR3SetCfgError,
+    SSMR3SetCfgErrorV,
+    SSMR3HandleGetStatus,
+    SSMR3HandleGetAfter,
+    SSMR3HandleIsLiveSave,
+    SSMR3HandleMaxDowntime,
+    SSMR3HandleHostBits,
+    SSMR3HandleRevision,
+    SSMR3HandleVersion,
+    SSMR3HandleHostOSAndArch,
+    pdmR3DevHlp_TMTimerCreate,
+    pdmR3DevHlp_TimerCreate,
+    pdmR3DevHlp_TimerToPtr,
+    pdmR3DevHlp_TimerFromMicro,
+    pdmR3DevHlp_TimerFromMilli,
+    pdmR3DevHlp_TimerFromNano,
+    pdmR3DevHlp_TimerGet,
+    pdmR3DevHlp_TimerGetFreq,
+    pdmR3DevHlp_TimerGetNano,
+    pdmR3DevHlp_TimerIsActive,
+    pdmR3DevHlp_TimerIsLockOwner,
+    pdmR3DevHlp_TimerLockClock,
+    pdmR3DevHlp_TimerLockClock2,
+    pdmR3DevHlp_TimerSet,
+    pdmR3DevHlp_TimerSetFrequencyHint,
+    pdmR3DevHlp_TimerSetMicro,
+    pdmR3DevHlp_TimerSetMillies,
+    pdmR3DevHlp_TimerSetNano,
+    pdmR3DevHlp_TimerSetRelative,
+    pdmR3DevHlp_TimerStop,
+    pdmR3DevHlp_TimerUnlockClock,
+    pdmR3DevHlp_TimerUnlockClock2,
+    pdmR3DevHlp_TimerSetCritSect,
+    pdmR3DevHlp_TimerSave,
+    pdmR3DevHlp_TimerLoad,
+    pdmR3DevHlp_TimerDestroy,
+    TMR3TimerSkip,
+    pdmR3DevHlp_TMUtcNow,
+    CFGMR3Exists,
+    CFGMR3QueryType,
+    CFGMR3QuerySize,
+    CFGMR3QueryInteger,
+    CFGMR3QueryIntegerDef,
+    CFGMR3QueryString,
+    CFGMR3QueryStringDef,
+    CFGMR3QueryBytes,
+    CFGMR3QueryU64,
+    CFGMR3QueryU64Def,
+    CFGMR3QueryS64,
+    CFGMR3QueryS64Def,
+    CFGMR3QueryU32,
+    CFGMR3QueryU32Def,
+    CFGMR3QueryS32,
+    CFGMR3QueryS32Def,
+    CFGMR3QueryU16,
+    CFGMR3QueryU16Def,
+    CFGMR3QueryS16,
+    CFGMR3QueryS16Def,
+    CFGMR3QueryU8,
+    CFGMR3QueryU8Def,
+    CFGMR3QueryS8,
+    CFGMR3QueryS8Def,
+    CFGMR3QueryBool,
+    CFGMR3QueryBoolDef,
+    CFGMR3QueryPort,
+    CFGMR3QueryPortDef,
+    CFGMR3QueryUInt,
+    CFGMR3QueryUIntDef,
+    CFGMR3QuerySInt,
+    CFGMR3QuerySIntDef,
+    CFGMR3QueryPtr,
+    CFGMR3QueryPtrDef,
+    CFGMR3QueryGCPtr,
+    CFGMR3QueryGCPtrDef,
+    CFGMR3QueryGCPtrU,
+    CFGMR3QueryGCPtrUDef,
+    CFGMR3QueryGCPtrS,
+    CFGMR3QueryGCPtrSDef,
+    CFGMR3QueryStringAlloc,
+    CFGMR3QueryStringAllocDef,
+    CFGMR3GetParent,
+    CFGMR3GetChild,
+    CFGMR3GetChildF,
+    CFGMR3GetChildFV,
+    CFGMR3GetFirstChild,
+    CFGMR3GetNextChild,
+    CFGMR3GetName,
+    CFGMR3GetNameLen,
+    CFGMR3AreChildrenValid,
+    CFGMR3GetFirstValue,
+    CFGMR3GetNextValue,
+    CFGMR3GetValueName,
+    CFGMR3GetValueNameLen,
+    CFGMR3GetValueType,
+    CFGMR3AreValuesValid,
+    CFGMR3ValidateConfig,
+    pdmR3DevHlp_PhysRead,
+    pdmR3DevHlp_PhysWrite,
+    pdmR3DevHlp_PhysGCPhys2CCPtr,
+    pdmR3DevHlp_PhysGCPhys2CCPtrReadOnly,
+    pdmR3DevHlp_PhysReleasePageMappingLock,
+    pdmR3DevHlp_PhysReadGCVirt,
+    pdmR3DevHlp_PhysWriteGCVirt,
+    pdmR3DevHlp_PhysGCPtr2GCPhys,
+    pdmR3DevHlp_MMHeapAlloc,
+    pdmR3DevHlp_MMHeapAllocZ,
+    pdmR3DevHlp_MMHeapFree,
+    pdmR3DevHlp_VMState,
+    pdmR3DevHlp_VMTeleportedAndNotFullyResumedYet,
+    pdmR3DevHlp_VMSetError,
+    pdmR3DevHlp_VMSetErrorV,
+    pdmR3DevHlp_VMSetRuntimeError,
+    pdmR3DevHlp_VMSetRuntimeErrorV,
+    pdmR3DevHlp_DBGFStopV,
+    pdmR3DevHlp_DBGFInfoRegister,
+    pdmR3DevHlp_DBGFInfoRegisterArgv,
+    pdmR3DevHlp_DBGFRegRegister,
+    pdmR3DevHlp_DBGFTraceBuf,
+    pdmR3DevHlp_STAMRegister,
+    pdmR3DevHlp_STAMRegisterV,
+    pdmR3DevHlp_PCIRegister,
+    pdmR3DevHlp_PCIRegisterMsi,
+    pdmR3DevHlp_PCIIORegionRegister,
+    pdmR3DevHlp_PCIInterceptConfigAccesses,
+    pdmR3DevHlp_PCIConfigWrite,
+    pdmR3DevHlp_PCIConfigRead,
+    pdmR3DevHlp_PCIPhysRead,
+    pdmR3DevHlp_PCIPhysWrite,
+    pdmR3DevHlp_PCISetIrq,
+    pdmR3DevHlp_PCISetIrqNoWait,
+    pdmR3DevHlp_ISASetIrq,
+    pdmR3DevHlp_ISASetIrqNoWait,
+    pdmR3DevHlp_IoApicSendMsi,
+    pdmR3DevHlp_DriverAttach,
+    pdmR3DevHlp_DriverDetach,
+    pdmR3DevHlp_DriverReconfigure,
+    pdmR3DevHlp_QueueCreatePtr,
+    pdmR3DevHlp_QueueCreate,
+    pdmR3DevHlp_QueueToPtr,
+    pdmR3DevHlp_QueueAlloc,
+    pdmR3DevHlp_QueueInsert,
+    pdmR3DevHlp_QueueInsertEx,
+    pdmR3DevHlp_QueueFlushIfNecessary,
+    pdmR3DevHlp_TaskCreate,
+    pdmR3DevHlp_TaskTrigger,
+    pdmR3DevHlp_SUPSemEventCreate,
+    pdmR3DevHlp_SUPSemEventClose,
+    pdmR3DevHlp_SUPSemEventSignal,
+    pdmR3DevHlp_SUPSemEventWaitNoResume,
+    pdmR3DevHlp_SUPSemEventWaitNsAbsIntr,
+    pdmR3DevHlp_SUPSemEventWaitNsRelIntr,
+    pdmR3DevHlp_SUPSemEventGetResolution,
+    pdmR3DevHlp_SUPSemEventMultiCreate,
+    pdmR3DevHlp_SUPSemEventMultiClose,
+    pdmR3DevHlp_SUPSemEventMultiSignal,
+    pdmR3DevHlp_SUPSemEventMultiReset,
+    pdmR3DevHlp_SUPSemEventMultiWaitNoResume,
+    pdmR3DevHlp_SUPSemEventMultiWaitNsAbsIntr,
+    pdmR3DevHlp_SUPSemEventMultiWaitNsRelIntr,
+    pdmR3DevHlp_SUPSemEventMultiGetResolution,
+    pdmR3DevHlp_CritSectInit,
+    pdmR3DevHlp_CritSectGetNop,
+    pdmR3DevHlp_CritSectGetNopR0,
+    pdmR3DevHlp_CritSectGetNopRC,
+    pdmR3DevHlp_SetDeviceCritSect,
+    pdmR3DevHlp_CritSectYield,
+    pdmR3DevHlp_CritSectEnter,
+    pdmR3DevHlp_CritSectEnterDebug,
+    pdmR3DevHlp_CritSectTryEnter,
+    pdmR3DevHlp_CritSectTryEnterDebug,
+    pdmR3DevHlp_CritSectLeave,
+    pdmR3DevHlp_CritSectIsOwner,
+    pdmR3DevHlp_CritSectIsInitialized,
+    pdmR3DevHlp_CritSectHasWaiters,
+    pdmR3DevHlp_CritSectGetRecursion,
+    pdmR3DevHlp_CritSectScheduleExitEvent,
+    pdmR3DevHlp_CritSectDelete,
+    pdmR3DevHlp_ThreadCreate,
+    PDMR3ThreadDestroy,
+    PDMR3ThreadIAmSuspending,
+    PDMR3ThreadIAmRunning,
+    PDMR3ThreadSleep,
+    PDMR3ThreadSuspend,
+    PDMR3ThreadResume,
+    pdmR3DevHlp_SetAsyncNotification,
+    pdmR3DevHlp_AsyncNotificationCompleted,
+    pdmR3DevHlp_RTCRegister,
+    pdmR3DevHlp_PCIBusRegister,
+    pdmR3DevHlp_PICRegister,
+    pdmR3DevHlp_ApicRegister,
+    pdmR3DevHlp_IoApicRegister,
+    pdmR3DevHlp_HpetRegister,
+    pdmR3DevHlp_PciRawRegister,
+    pdmR3DevHlp_DMACRegister,
+    pdmR3DevHlp_DMARegister,
+    pdmR3DevHlp_DMAReadMemory,
+    pdmR3DevHlp_DMAWriteMemory,
+    pdmR3DevHlp_DMASetDREQ,
+    pdmR3DevHlp_DMAGetChannelMode,
+    pdmR3DevHlp_DMASchedule,
+    pdmR3DevHlp_CMOSWrite,
+    pdmR3DevHlp_CMOSRead,
+    pdmR3DevHlp_AssertEMT,
+    pdmR3DevHlp_AssertOther,
+    pdmR3DevHlp_LdrGetRCInterfaceSymbols,
+    pdmR3DevHlp_LdrGetR0InterfaceSymbols,
+    pdmR3DevHlp_CallR0,
+    pdmR3DevHlp_VMGetSuspendReason,
+    pdmR3DevHlp_VMGetResumeReason,
+    pdmR3DevHlp_PhysBulkGCPhys2CCPtr,
+    pdmR3DevHlp_PhysBulkGCPhys2CCPtrReadOnly,
+    pdmR3DevHlp_PhysBulkReleasePageMappingLocks,
+    0,
+    0,
+    0,
+    0,
+    0,
+    0,
+    0,
+    0,
+    0,
+    0,
+    pdmR3DevHlp_Untrusted_GetUVM,
+    pdmR3DevHlp_Untrusted_GetVM,
+    pdmR3DevHlp_Untrusted_GetVMCPU,
+    pdmR3DevHlp_Untrusted_GetCurrentCpuId,
+    pdmR3DevHlp_Untrusted_RegisterVMMDevHeap,
+    pdmR3DevHlp_Untrusted_FirmwareRegister,
+    pdmR3DevHlp_Untrusted_VMReset,
+    pdmR3DevHlp_Untrusted_VMSuspend,
+    pdmR3DevHlp_Untrusted_VMSuspendSaveAndPowerOff,
+    pdmR3DevHlp_Untrusted_VMPowerOff,
+    pdmR3DevHlp_Untrusted_A20IsEnabled,
+    pdmR3DevHlp_Untrusted_A20Set,
+    pdmR3DevHlp_Untrusted_GetCpuId,
+    pdmR3DevHlp_TMTimeVirtGet,
+    pdmR3DevHlp_TMTimeVirtGetFreq,
+    pdmR3DevHlp_TMTimeVirtGetNano,
+    pdmR3DevHlp_Untrusted_GetSupDrvSession,
+    pdmR3DevHlp_Untrusted_QueryGenericUserObject,
+    PDM_DEVHLPR3_VERSION /* the end */
+};
+
+
+
+/**
+ * Queue consumer callback for internal component.
+ *
+ * @returns Success indicator.
+ *          If false the item will not be removed and the flushing will stop.
+ * @param   pVM         The cross context VM structure.
+ * @param   pItem       The item to consume. Upon return this item will be freed.
+ */
+DECLCALLBACK(bool) pdmR3DevHlpQueueConsumer(PVM pVM, PPDMQUEUEITEMCORE pItem)
+{
+    PPDMDEVHLPTASK pTask = (PPDMDEVHLPTASK)pItem;
+    LogFlow(("pdmR3DevHlpQueueConsumer: enmOp=%d pDevIns=%p\n", pTask->enmOp, pTask->pDevInsR3));
+    switch (pTask->enmOp)
+    {
+        case PDMDEVHLPTASKOP_ISA_SET_IRQ:
+            PDMIsaSetIrq(pVM, pTask->u.IsaSetIRQ.iIrq, pTask->u.IsaSetIRQ.iLevel, pTask->u.IsaSetIRQ.uTagSrc);
+            break;
+
+        case PDMDEVHLPTASKOP_PCI_SET_IRQ:
+        {
+            /* Same as pdmR3DevHlp_PCISetIrq, except we've got a tag already. */
+            PPDMPCIDEV pPciDev = pTask->u.PciSetIRQ.pPciDevR3;
+            if (pPciDev)
+            {
+                size_t const    idxBus = pPciDev->Int.s.idxPdmBus;
+                AssertBreak(idxBus < RT_ELEMENTS(pVM->pdm.s.aPciBuses));
+                PPDMPCIBUS      pBus   = &pVM->pdm.s.aPciBuses[idxBus];
+
+                pdmLock(pVM);
+                pBus->pfnSetIrqR3(pBus->pDevInsR3, pPciDev, pTask->u.PciSetIRQ.iIrq,
+                                  pTask->u.PciSetIRQ.iLevel, pTask->u.PciSetIRQ.uTagSrc);
+                pdmUnlock(pVM);
+            }
+            else
+                AssertReleaseMsgFailed(("No PCI device registered!\n"));
+            break;
+        }
+
+        case PDMDEVHLPTASKOP_IOAPIC_SET_IRQ:
+            PDMIoApicSetIrq(pVM, pTask->u.IoApicSetIRQ.iIrq, pTask->u.IoApicSetIRQ.iLevel, pTask->u.IoApicSetIRQ.uTagSrc);
+            break;
+
+        default:
+            AssertReleaseMsgFailed(("Invalid operation %d\n", pTask->enmOp));
+            break;
+    }
+    return true;
+}
+
+/** @} */
+