Adding upstream version 7.0.6-dfsg.upstream/7.0.6-dfsgupstream

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

17 files changed, 3438 insertions, 0 deletions

diff --git a/include/VBox/Graphics/HGSMI.h b/include/VBox/Graphics/HGSMI.h
new file mode 100644
index 00000000..da485add
--- /dev/null
+++ b/include/VBox/Graphics/HGSMI.h
@@ -0,0 +1,251 @@
+/* $Id: HGSMI.h $ */
+/** @file
+ * VBox Host Guest Shared Memory Interface (HGSMI) - Host/Guest shared part.
+ */
+
+/*
+ * Copyright (C) 2006-2022 Oracle and/or its affiliates.
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following
+ * conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef VBOX_INCLUDED_Graphics_HGSMI_h
+#define VBOX_INCLUDED_Graphics_HGSMI_h
+#ifndef RT_WITHOUT_PRAGMA_ONCE
+# pragma once
+#endif
+
+#include "VBoxVideoIPRT.h"
+
+#include "HGSMIDefs.h"
+#include "HGSMIChannels.h"
+#include "HGSMIMemAlloc.h"
+
+/**
+ * Basic mechanism for the HGSMI is to prepare and pass data buffer to the host and the guest.
+ * Data inside these buffers are opaque for the HGSMI and are interpreted by higher levels.
+ *
+ * Every shared memory buffer passed between the guest/host has the following structure:
+ *
+ * HGSMIBUFFERHEADER header;
+ * uint8_t data[header.u32BufferSize];
+ * HGSMIBUFFERTAIL tail;
+ *
+ * Note: Offset of the 'header' in the memory is used for virtual hardware IO.
+ *
+ * Buffers are verifyed using the offset and the content of the header and the tail,
+ * which are constant during a call.
+ *
+ * Invalid buffers are ignored.
+ *
+ * Actual 'data' is not verifyed, as it is expected that the data can be changed by the
+ * called function.
+ *
+ * Since only the offset of the buffer is passed in a IO operation, the header and tail
+ * must contain:
+ *     * size of data in this buffer;
+ *     * checksum for buffer verification.
+ *
+ * For segmented transfers:
+ *     * the sequence identifier;
+ *     * offset of the current segment in the sequence;
+ *     * total bytes in the transfer.
+ *
+ * Additionally contains:
+ *     * the channel ID;
+ *     * the channel information.
+ */
+
+typedef struct HGSMIHEAP
+{
+    HGSMIAREA area; /**< Description. */
+    HGSMIMADATA ma; /**< Memory allocator */
+} HGSMIHEAP;
+
+/* The size of the array of channels. Array indexes are uint8_t. Note: the value must not be changed. */
+#define HGSMI_NUMBER_OF_CHANNELS 0x100
+
+/**
+ * Channel handler called when the guest submits a buffer.
+ *
+ * @returns stuff
+ * @param   pvHandler       Value specified when registring.
+ * @param   u16ChannelInfo  Command code.
+ * @param   pvBuffer        HGSMI buffer with command data.  This is shared with
+ *                          the guest.  Consider untrusted and volatile!
+ * @param   cbBuffer        Size of command data.
+ * @thread  EMT on the host side.
+ */
+typedef DECLCALLBACKTYPE(int, FNHGSMICHANNELHANDLER,(void *pvHandler, uint16_t u16ChannelInfo,
+                                                     RT_UNTRUSTED_VOLATILE_HSTGST void *pvBuffer, HGSMISIZE cbBuffer));
+/** Pointer to a channel handler callback. */
+typedef FNHGSMICHANNELHANDLER *PFNHGSMICHANNELHANDLER;
+
+/** Information about a handler: pfn + context. */
+typedef struct _HGSMICHANNELHANDLER
+{
+    PFNHGSMICHANNELHANDLER pfnHandler;
+    void *pvHandler;
+} HGSMICHANNELHANDLER;
+
+/** Channel description. */
+typedef struct _HGSMICHANNEL
+{
+    HGSMICHANNELHANDLER handler;       /**< The channel handler. */
+    const char *pszName;               /**< NULL for hardcoded channels or RTStrDup'ed name. */
+    uint8_t u8Channel;                 /**< The channel id, equal to the channel index in the array. */
+    uint8_t u8Flags;                   /**< HGSMI_CH_F_* */
+} HGSMICHANNEL;
+
+typedef struct _HGSMICHANNELINFO
+{
+    /** Channel handlers indexed by the channel id.
+     * The array is accessed under the instance lock. */
+    HGSMICHANNEL Channels[HGSMI_NUMBER_OF_CHANNELS];
+}  HGSMICHANNELINFO;
+
+
+RT_C_DECLS_BEGIN
+
+DECLINLINE(HGSMIBUFFERHEADER *) HGSMIBufferHeaderFromPtr(void RT_UNTRUSTED_VOLATILE_HSTGST *pvBuffer)
+{
+    return (HGSMIBUFFERHEADER *)pvBuffer;
+}
+
+DECLINLINE(uint8_t RT_UNTRUSTED_VOLATILE_HSTGST *) HGSMIBufferDataFromPtr(void RT_UNTRUSTED_VOLATILE_HSTGST *pvBuffer)
+{
+    return (uint8_t RT_UNTRUSTED_VOLATILE_HSTGST *)pvBuffer + sizeof(HGSMIBUFFERHEADER);
+}
+
+DECLINLINE(HGSMIBUFFERTAIL RT_UNTRUSTED_VOLATILE_HSTGST *)
+HGSMIBufferTailFromPtr(void RT_UNTRUSTED_VOLATILE_HSTGST *pvBuffer, uint32_t u32DataSize)
+{
+    return (HGSMIBUFFERTAIL RT_UNTRUSTED_VOLATILE_HSTGST *)(HGSMIBufferDataFromPtr(pvBuffer) + u32DataSize);
+}
+
+DECLINLINE(HGSMISIZE) HGSMIBufferMinimumSize(void)
+{
+    return sizeof(HGSMIBUFFERHEADER) + sizeof(HGSMIBUFFERTAIL);
+}
+
+DECLINLINE(HGSMIBUFFERHEADER RT_UNTRUSTED_VOLATILE_HSTGST *) HGSMIBufferHeaderFromData(const void RT_UNTRUSTED_VOLATILE_HSTGST *pvData)
+{
+    return (HGSMIBUFFERHEADER RT_UNTRUSTED_VOLATILE_HSTGST *)((uint8_t *)pvData - sizeof(HGSMIBUFFERHEADER));
+}
+
+DECLINLINE(HGSMISIZE) HGSMIBufferRequiredSize(uint32_t u32DataSize)
+{
+    return HGSMIBufferMinimumSize() + u32DataSize;
+}
+
+DECLINLINE(HGSMIOFFSET) HGSMIPointerToOffset(const HGSMIAREA *pArea, const void RT_UNTRUSTED_VOLATILE_HSTGST *pv)
+{
+    return pArea->offBase + (HGSMIOFFSET)((uint8_t *)pv - pArea->pu8Base);
+}
+
+DECLINLINE(void RT_UNTRUSTED_VOLATILE_HSTGST *) HGSMIOffsetToPointer(const HGSMIAREA *pArea, HGSMIOFFSET offBuffer)
+{
+    return pArea->pu8Base + (offBuffer - pArea->offBase);
+}
+
+DECLINLINE(uint8_t RT_UNTRUSTED_VOLATILE_HSTGST*) HGSMIBufferDataFromOffset(const HGSMIAREA *pArea, HGSMIOFFSET offBuffer)
+{
+    void RT_UNTRUSTED_VOLATILE_HSTGST *pvBuffer = HGSMIOffsetToPointer(pArea, offBuffer);
+    return HGSMIBufferDataFromPtr(pvBuffer);
+}
+
+DECLINLINE(HGSMIOFFSET) HGSMIBufferOffsetFromData(const HGSMIAREA *pArea, void RT_UNTRUSTED_VOLATILE_HSTGST *pvData)
+{
+    HGSMIBUFFERHEADER RT_UNTRUSTED_VOLATILE_HSTGST *pHeader = HGSMIBufferHeaderFromData(pvData);
+    return HGSMIPointerToOffset(pArea, pHeader);
+}
+
+DECLINLINE(uint8_t RT_UNTRUSTED_VOLATILE_HSTGST *) HGSMIBufferDataAndChInfoFromOffset(const HGSMIAREA *pArea,
+                                                                                      HGSMIOFFSET offBuffer,
+                                                                                      uint16_t *pu16ChannelInfo)
+{
+    HGSMIBUFFERHEADER RT_UNTRUSTED_VOLATILE_HSTGST *pHeader =
+        (HGSMIBUFFERHEADER RT_UNTRUSTED_VOLATILE_HSTGST *)HGSMIOffsetToPointer(pArea, offBuffer);
+    *pu16ChannelInfo = pHeader->u16ChannelInfo;
+    return HGSMIBufferDataFromPtr(pHeader);
+}
+
+uint32_t HGSMIChecksum(HGSMIOFFSET offBuffer, const HGSMIBUFFERHEADER RT_UNTRUSTED_VOLATILE_HSTGST *pHeader,
+                       const HGSMIBUFFERTAIL RT_UNTRUSTED_VOLATILE_HSTGST *pTail);
+
+int  HGSMIAreaInitialize(HGSMIAREA *pArea, void *pvBase, HGSMISIZE cbArea, HGSMIOFFSET offBase);
+void HGSMIAreaClear(HGSMIAREA *pArea);
+
+DECLINLINE(bool) HGSMIAreaContainsOffset(const HGSMIAREA *pArea, HGSMIOFFSET off)
+{
+    return off >= pArea->offBase && off - pArea->offBase < pArea->cbArea;
+}
+
+DECLINLINE(bool) HGSMIAreaContainsPointer(const HGSMIAREA *pArea, const void RT_UNTRUSTED_VOLATILE_HSTGST *pv)
+{
+    return (uintptr_t)pv - (uintptr_t)pArea->pu8Base < pArea->cbArea;
+}
+
+HGSMIOFFSET HGSMIBufferInitializeSingle(const HGSMIAREA *pArea, HGSMIBUFFERHEADER *pHeader, HGSMISIZE cbBuffer,
+                                        uint8_t u8Channel, uint16_t u16ChannelInfo);
+
+int  HGSMIHeapSetup(HGSMIHEAP *pHeap, void *pvBase, HGSMISIZE cbArea, HGSMIOFFSET offBase, const HGSMIENV *pEnv);
+void HGSMIHeapDestroy(HGSMIHEAP *pHeap);
+void RT_UNTRUSTED_VOLATILE_HSTGST *HGSMIHeapBufferAlloc(HGSMIHEAP *pHeap, HGSMISIZE cbBuffer);
+void HGSMIHeapBufferFree(HGSMIHEAP *pHeap, void RT_UNTRUSTED_VOLATILE_HSTGST *pvBuf);
+
+void RT_UNTRUSTED_VOLATILE_HOST *HGSMIHeapAlloc(HGSMIHEAP *pHeap,
+                                                HGSMISIZE cbData,
+                                                uint8_t u8Channel,
+                                                uint16_t u16ChannelInfo);
+
+void HGSMIHeapFree(HGSMIHEAP *pHeap, void RT_UNTRUSTED_VOLATILE_HSTGST *pvData);
+
+DECLINLINE(const HGSMIAREA *) HGSMIHeapArea(HGSMIHEAP *pHeap)
+{
+    return &pHeap->area;
+}
+
+DECLINLINE(HGSMIOFFSET) HGSMIHeapOffset(HGSMIHEAP *pHeap)
+{
+    return HGSMIHeapArea(pHeap)->offBase;
+}
+
+DECLINLINE(HGSMISIZE) HGSMIHeapSize(HGSMIHEAP *pHeap)
+{
+    return HGSMIHeapArea(pHeap)->cbArea;
+}
+
+DECLINLINE(HGSMIOFFSET) HGSMIHeapBufferOffset(HGSMIHEAP *pHeap, void RT_UNTRUSTED_VOLATILE_HOST *pvData)
+{
+    return HGSMIBufferOffsetFromData(HGSMIHeapArea(pHeap), pvData);
+}
+
+HGSMICHANNEL *HGSMIChannelFindById(HGSMICHANNELINFO *pChannelInfo, uint8_t u8Channel);
+
+int HGSMIChannelRegister(HGSMICHANNELINFO *pChannelInfo, uint8_t u8Channel, const char *pszName,
+                         PFNHGSMICHANNELHANDLER pfnChannelHandler, void *pvChannelHandler);
+int HGSMIBufferProcess(const HGSMIAREA *pArea, HGSMICHANNELINFO *pChannelInfo, HGSMIOFFSET offBuffer);
+RT_C_DECLS_END
+
+#endif /* !VBOX_INCLUDED_Graphics_HGSMI_h */
+
diff --git a/include/VBox/Graphics/HGSMIBase.h b/include/VBox/Graphics/HGSMIBase.h
new file mode 100644
index 00000000..aad0bfbe
--- /dev/null
+++ b/include/VBox/Graphics/HGSMIBase.h
@@ -0,0 +1,60 @@
+/* $Id: HGSMIBase.h $ */
+/** @file
+ * VBox Host Guest Shared Memory Interface (HGSMI) - buffer management.
+ */
+
+/*
+ * Copyright (C) 2006-2022 Oracle and/or its affiliates.
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following
+ * conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef VBOX_INCLUDED_Graphics_HGSMIBase_h
+#define VBOX_INCLUDED_Graphics_HGSMIBase_h
+#ifndef RT_WITHOUT_PRAGMA_ONCE
+# pragma once
+#endif
+
+#include "HGSMI.h"
+#include "HGSMIContext.h"
+#include "VBoxVideoIPRT.h"
+
+RT_C_DECLS_BEGIN
+
+/** @name Base HGSMI Buffer APIs
+ * @{ */
+
+/** Acknowlege an IRQ. */
+DECLINLINE(void) VBoxHGSMIClearIrq(PHGSMIHOSTCOMMANDCONTEXT pCtx)
+{
+    VBVO_PORT_WRITE_U32(pCtx->port, HGSMIOFFSET_VOID);
+}
+
+DECLHIDDEN(void RT_UNTRUSTED_VOLATILE_HOST *) VBoxHGSMIBufferAlloc(PHGSMIGUESTCOMMANDCONTEXT pCtx, HGSMISIZE cbData,
+                                                                   uint8_t u8Ch, uint16_t u16Op);
+DECLHIDDEN(void) VBoxHGSMIBufferFree(PHGSMIGUESTCOMMANDCONTEXT pCtx, void RT_UNTRUSTED_VOLATILE_HOST *pvBuffer);
+DECLHIDDEN(int)  VBoxHGSMIBufferSubmit(PHGSMIGUESTCOMMANDCONTEXT pCtx, void RT_UNTRUSTED_VOLATILE_HOST *pvBuffer);
+/** @}  */
+
+RT_C_DECLS_END
+
+#endif /* !VBOX_INCLUDED_Graphics_HGSMIBase_h */
diff --git a/include/VBox/Graphics/HGSMIChSetup.h b/include/VBox/Graphics/HGSMIChSetup.h
new file mode 100644
index 00000000..0e11b580
--- /dev/null
+++ b/include/VBox/Graphics/HGSMIChSetup.h
@@ -0,0 +1,88 @@
+/* $Id: HGSMIChSetup.h $ */
+/** @file
+ * VBox Host Guest Shared Memory Interface (HGSMI), Host/Guest shared part.
+ */
+
+/*
+ * Copyright (C) 2006-2022 Oracle and/or its affiliates.
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following
+ * conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef VBOX_INCLUDED_Graphics_HGSMIChSetup_h
+#define VBOX_INCLUDED_Graphics_HGSMIChSetup_h
+#ifndef RT_WITHOUT_PRAGMA_ONCE
+# pragma once
+#endif
+
+#include "HGSMIDefs.h"
+
+/* HGSMI setup and configuration channel commands and data structures. */
+/*
+ * Tell the host the location of hgsmi_host_flags structure, where the host
+ * can write information about pending buffers, etc, and which can be quickly
+ * polled by the guest without a need to port IO.
+ */
+#define HGSMI_CC_HOST_FLAGS_LOCATION 0
+
+typedef struct HGSMIBUFFERLOCATION
+{
+    HGSMIOFFSET offLocation;
+    HGSMISIZE   cbLocation;
+} HGSMIBUFFERLOCATION;
+AssertCompileSize(HGSMIBUFFERLOCATION, 8);
+
+/* HGSMI setup and configuration data structures. */
+/* host->guest commands pending, should be accessed under FIFO lock only */
+#define HGSMIHOSTFLAGS_COMMANDS_PENDING    UINT32_C(0x01)
+/* IRQ is fired, should be accessed under VGAState::lock only  */
+#define HGSMIHOSTFLAGS_IRQ                 UINT32_C(0x02)
+#ifdef VBOX_WITH_WDDM
+/* one or more guest commands is completed, should be accessed under FIFO lock only */
+# define HGSMIHOSTFLAGS_GCOMMAND_COMPLETED UINT32_C(0x04)
+#endif
+/* vsync interrupt flag, should be accessed under VGAState::lock only */
+#define HGSMIHOSTFLAGS_VSYNC               UINT32_C(0x10)
+/** monitor hotplug flag, should be accessed under VGAState::lock only */
+#define HGSMIHOSTFLAGS_HOTPLUG             UINT32_C(0x20)
+/**
+ * Cursor capability state change flag, should be accessed under
+ * VGAState::lock only.  @see VBVACONF32.
+ */
+#define HGSMIHOSTFLAGS_CURSOR_CAPABILITIES UINT32_C(0x40)
+
+typedef struct HGSMIHOSTFLAGS
+{
+    /*
+     * Host flags can be accessed and modified in multiple threads
+     * concurrently, e.g. CrOpenGL HGCM and GUI threads when completing
+     * HGSMI 3D and Video Accel respectively, EMT thread when dealing with
+     * HGSMI command processing, etc.
+     * Besides settings/cleaning flags atomically, some flags have their
+     * own special sync restrictions, see comments for flags above.
+     */
+    volatile uint32_t u32HostFlags;
+    uint32_t au32Reserved[3];
+} HGSMIHOSTFLAGS;
+AssertCompileSize(HGSMIHOSTFLAGS, 16);
+
+#endif /* !VBOX_INCLUDED_Graphics_HGSMIChSetup_h */
diff --git a/include/VBox/Graphics/HGSMIChannels.h b/include/VBox/Graphics/HGSMIChannels.h
new file mode 100644
index 00000000..c957040b
--- /dev/null
+++ b/include/VBox/Graphics/HGSMIChannels.h
@@ -0,0 +1,77 @@
+/* $Id: HGSMIChannels.h $ */
+/** @file
+ *
+ * VBox Host Guest Shared Memory Interface (HGSMI).
+ * Host/Guest shared part.
+ * Channel identifiers.
+ */
+
+/*
+ * Copyright (C) 2006-2022 Oracle and/or its affiliates.
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following
+ * conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef VBOX_INCLUDED_Graphics_HGSMIChannels_h
+#define VBOX_INCLUDED_Graphics_HGSMIChannels_h
+#ifndef RT_WITHOUT_PRAGMA_ONCE
+# pragma once
+#endif
+
+
+/*
+ * Each channel has an 8 bit identifier. There are a number of predefined
+ * (hardcoded) channels.
+ *
+ * HGSMI_CH_HGSMI channel can be used to map a string channel identifier
+ * to a free 16 bit numerical value. values are allocated in range
+ * [HGSMI_CH_STRING_FIRST;HGSMI_CH_STRING_LAST].
+ */
+
+
+/* Predefined channel identifiers. Used internally by VBOX to simplify the channel setup. */
+/* A reserved channel value */
+#define HGSMI_CH_RESERVED     0x00
+/* HGCMI: setup and configuration */
+#define HGSMI_CH_HGSMI        0x01
+/* Graphics: VBVA */
+#define HGSMI_CH_VBVA         0x02
+/* Graphics: Seamless with a single guest region */
+#define HGSMI_CH_SEAMLESS     0x03
+/* Graphics: Seamless with separate host windows */
+#define HGSMI_CH_SEAMLESS2    0x04
+/* Graphics: OpenGL HW acceleration */
+#define HGSMI_CH_OPENGL       0x05
+
+
+/* Dynamically allocated channel identifiers. */
+/* The first channel index to be used for string mappings (inclusive) */
+#define HGSMI_CH_STRING_FIRST 0x20
+/* The last channel index for string mappings (inclusive) */
+#define HGSMI_CH_STRING_LAST  0xff
+
+
+/* Check whether the channel identifier is allocated for a dynamic channel */
+#define HGSMI_IS_DYNAMIC_CHANNEL(_channel) (((uint8_t)(_channel) & 0xE0) != 0)
+
+
+#endif /* !VBOX_INCLUDED_Graphics_HGSMIChannels_h */
diff --git a/include/VBox/Graphics/HGSMIContext.h b/include/VBox/Graphics/HGSMIContext.h
new file mode 100644
index 00000000..23e810c0
--- /dev/null
+++ b/include/VBox/Graphics/HGSMIContext.h
@@ -0,0 +1,114 @@
+/* $Id: HGSMIContext.h $ */
+/** @file
+ * VBox Host Guest Shared Memory Interface (HGSMI) - command contexts.
+ */
+
+/*
+ * Copyright (C) 2006-2022 Oracle and/or its affiliates.
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following
+ * conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef VBOX_INCLUDED_Graphics_HGSMIContext_h
+#define VBOX_INCLUDED_Graphics_HGSMIContext_h
+#ifndef RT_WITHOUT_PRAGMA_ONCE
+# pragma once
+#endif
+
+#include "HGSMI.h"
+#include "HGSMIChSetup.h"
+#include "VBoxVideoIPRT.h"
+
+#ifdef VBOX_WDDM_MINIPORT
+# include "wddm/VBoxMPShgsmi.h"
+ typedef VBOXSHGSMI HGSMIGUESTCMDHEAP;
+# define HGSMIGUESTCMDHEAP_GET(_p) (&(_p)->Heap)
+#else
+ typedef HGSMIHEAP HGSMIGUESTCMDHEAP;
+# define HGSMIGUESTCMDHEAP_GET(_p) (_p)
+#endif
+
+RT_C_DECLS_BEGIN
+
+/**
+ * Structure grouping the context needed for submitting commands to the host
+ * via HGSMI
+ */
+typedef struct HGSMIGUESTCOMMANDCONTEXT
+{
+    /** Information about the memory heap located in VRAM from which data
+     * structures to be sent to the host are allocated. */
+    HGSMIGUESTCMDHEAP heapCtx;
+    /** The I/O port used for submitting commands to the host by writing their
+     * offsets into the heap. */
+    RTIOPORT port;
+} HGSMIGUESTCOMMANDCONTEXT, *PHGSMIGUESTCOMMANDCONTEXT;
+
+
+/**
+ * Structure grouping the context needed for receiving commands from the host
+ * via HGSMI
+ */
+typedef struct HGSMIHOSTCOMMANDCONTEXT
+{
+    /** Information about the memory area located in VRAM in which the host
+     * places data structures to be read by the guest. */
+    HGSMIAREA areaCtx;
+    /** Convenience structure used for matching host commands to handlers. */
+    /** @todo handlers are registered individually in code rather than just
+     * passing a static structure in order to gain extra flexibility.  There is
+     * currently no expected usage case for this though.  Is the additional
+     * complexity really justified? */
+    HGSMICHANNELINFO channels;
+    /** Flag to indicate that one thread is currently processing the command
+     * queue. */
+    volatile bool fHostCmdProcessing;
+    /* Pointer to the VRAM location where the HGSMI host flags are kept. */
+    volatile HGSMIHOSTFLAGS *pfHostFlags;
+    /** The I/O port used for receiving commands from the host as offsets into
+     * the memory area and sending back confirmations (command completion,
+     * IRQ acknowlegement). */
+    RTIOPORT port;
+} HGSMIHOSTCOMMANDCONTEXT, *PHGSMIHOSTCOMMANDCONTEXT;
+
+/** @name HGSMI context initialisation APIs.
+ * @{ */
+
+/** @todo we should provide a cleanup function too as part of the API */
+DECLHIDDEN(int)      VBoxHGSMISetupGuestContext(PHGSMIGUESTCOMMANDCONTEXT pCtx,
+                                                void *pvGuestHeapMemory,
+                                                uint32_t cbGuestHeapMemory,
+                                                uint32_t offVRAMGuestHeapMemory,
+                                                const HGSMIENV *pEnv);
+DECLHIDDEN(void)     VBoxHGSMISetupHostContext(PHGSMIHOSTCOMMANDCONTEXT pCtx,
+                                               void *pvBaseMapping,
+                                               uint32_t offHostFlags,
+                                               void *pvHostAreaMapping,
+                                               uint32_t offVRAMHostArea,
+                                               uint32_t cbHostArea);
+
+/** @}  */
+
+RT_C_DECLS_END
+
+#endif /* !VBOX_INCLUDED_Graphics_HGSMIContext_h */
+
diff --git a/include/VBox/Graphics/HGSMIDefs.h b/include/VBox/Graphics/HGSMIDefs.h
new file mode 100644
index 00000000..adbceafe
--- /dev/null
+++ b/include/VBox/Graphics/HGSMIDefs.h
@@ -0,0 +1,128 @@
+/* $Id: HGSMIDefs.h $ */
+/** @file
+ * VBox Host Guest Shared Memory Interface (HGSMI) - shared part - types and defines.
+ */
+
+/*
+ * Copyright (C) 2006-2022 Oracle and/or its affiliates.
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following
+ * conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef VBOX_INCLUDED_Graphics_HGSMIDefs_h
+#define VBOX_INCLUDED_Graphics_HGSMIDefs_h
+#ifndef RT_WITHOUT_PRAGMA_ONCE
+# pragma once
+#endif
+
+#include "VBoxVideoIPRT.h"
+
+/* HGSMI uses 32 bit offsets and sizes. */
+typedef uint32_t HGSMISIZE;
+typedef uint32_t HGSMIOFFSET;
+
+#define HGSMIOFFSET_VOID ((HGSMIOFFSET)~0)
+
+/**
+ * Describes a shared memory area buffer.
+ *
+ * Used for calculations with offsets and for buffers verification.
+ */
+typedef struct HGSMIAREA
+{
+    uint8_t     *pu8Base; /**< The starting address of the area. Corresponds to offset 'offBase'. */
+    HGSMIOFFSET  offBase; /**< The starting offset of the area. */
+    HGSMIOFFSET  offLast; /**< The last valid offset:  offBase + cbArea - 1 - (sizeof(header) + sizeof(tail)). */
+    HGSMISIZE    cbArea;  /**< Size of the area. */
+} HGSMIAREA;
+
+
+/* The buffer description flags. */
+#define HGSMI_BUFFER_HEADER_F_SEQ_MASK     0x03 /* Buffer sequence type mask. */
+#define HGSMI_BUFFER_HEADER_F_SEQ_SINGLE   0x00 /* Single buffer, not a part of a sequence. */
+#define HGSMI_BUFFER_HEADER_F_SEQ_START    0x01 /* The first buffer in a sequence. */
+#define HGSMI_BUFFER_HEADER_F_SEQ_CONTINUE 0x02 /* A middle buffer in a sequence. */
+#define HGSMI_BUFFER_HEADER_F_SEQ_END      0x03 /* The last buffer in a sequence. */
+
+
+#pragma pack(1) /** @todo not necessary. use AssertCompileSize instead. */
+/* 16 bytes buffer header. */
+typedef struct HGSMIBUFFERHEADER
+{
+    uint32_t    u32DataSize;            /* Size of data that follows the header. */
+
+    uint8_t     u8Flags;                /* The buffer description: HGSMI_BUFFER_HEADER_F_* */
+
+    uint8_t     u8Channel;              /* The channel the data must be routed to. */
+    uint16_t    u16ChannelInfo;         /* Opaque to the HGSMI, used by the channel. */
+
+    union {
+        uint8_t au8Union[8];            /* Opaque placeholder to make the union 8 bytes. */
+
+        struct
+        {                               /* HGSMI_BUFFER_HEADER_F_SEQ_SINGLE */
+            uint32_t u32Reserved1;      /* A reserved field, initialize to 0. */
+            uint32_t u32Reserved2;      /* A reserved field, initialize to 0. */
+        } Buffer;
+
+        struct
+        {                               /* HGSMI_BUFFER_HEADER_F_SEQ_START */
+            uint32_t u32SequenceNumber; /* The sequence number, the same for all buffers in the sequence. */
+            uint32_t u32SequenceSize;   /* The total size of the sequence. */
+        } SequenceStart;
+
+        struct
+        {                               /* HGSMI_BUFFER_HEADER_F_SEQ_CONTINUE and HGSMI_BUFFER_HEADER_F_SEQ_END */
+            uint32_t u32SequenceNumber; /* The sequence number, the same for all buffers in the sequence. */
+            uint32_t u32SequenceOffset; /* Data offset in the entire sequence. */
+        } SequenceContinue;
+    } u;
+} HGSMIBUFFERHEADER;
+
+/* 8 bytes buffer tail. */
+typedef struct HGSMIBUFFERTAIL
+{
+    uint32_t    u32Reserved;        /* Reserved, must be initialized to 0. */
+    uint32_t    u32Checksum;        /* Verifyer for the buffer header and offset and for first 4 bytes of the tail. */
+} HGSMIBUFFERTAIL;
+#pragma pack()
+
+AssertCompileSize(HGSMIBUFFERHEADER, 16);
+AssertCompileSize(HGSMIBUFFERTAIL, 8);
+
+/* The size of the array of channels. Array indexes are uint8_t. Note: the value must not be changed. */
+#define HGSMI_NUMBER_OF_CHANNELS 0x100
+
+typedef struct HGSMIENV
+{
+    /* Environment context pointer. */
+    void *pvEnv;
+
+    /* Allocate system memory. */
+    DECLCALLBACKMEMBER(void *, pfnAlloc,(void *pvEnv, HGSMISIZE cb));
+
+    /* Free system memory. */
+    DECLCALLBACKMEMBER(void, pfnFree,(void *pvEnv, void *pv));
+} HGSMIENV;
+
+#endif /* !VBOX_INCLUDED_Graphics_HGSMIDefs_h */
+
diff --git a/include/VBox/Graphics/HGSMIHostCmd.h b/include/VBox/Graphics/HGSMIHostCmd.h
new file mode 100644
index 00000000..9c8b0b9e
--- /dev/null
+++ b/include/VBox/Graphics/HGSMIHostCmd.h
@@ -0,0 +1,59 @@
+/* $Id: HGSMIHostCmd.h $ */
+/** @file
+ * VBox Host Guest Shared Memory Interface (HGSMI) - buffer management.
+ */
+
+/*
+ * Copyright (C) 2006-2022 Oracle and/or its affiliates.
+ *
+ * This file is part of VirtualBox base platform packages, as
+ * available from https://www.virtualbox.org.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, in version 3 of the
+ * License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses>.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
+ * in the VirtualBox distribution, in which case the provisions of the
+ * CDDL are applicable instead of those of the GPL.
+ *
+ * You may elect to license modified versions of this file under the
+ * terms and conditions of either the GPL or the CDDL or both.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
+ */
+
+#ifndef VBOX_INCLUDED_Graphics_HGSMIHostCmd_h
+#define VBOX_INCLUDED_Graphics_HGSMIHostCmd_h
+#ifndef RT_WITHOUT_PRAGMA_ONCE
+# pragma once
+#endif
+
+#include "HGSMI.h"
+#include "HGSMIContext.h"
+#include "VBoxVideoIPRT.h"
+
+RT_C_DECLS_BEGIN
+
+/** @name Base HGSMI host command APIs.
+ * @{ */
+
+DECLHIDDEN(void)     VBoxHGSMIHostCmdComplete(PHGSMIHOSTCOMMANDCONTEXT pCtx, void RT_UNTRUSTED_VOLATILE_HOST *pvMem);
+DECLHIDDEN(void)     VBoxHGSMIProcessHostQueue(PHGSMIHOSTCOMMANDCONTEXT pCtx);
+
+/** @}  */
+
+RT_C_DECLS_END
+
+#endif /* !VBOX_INCLUDED_Graphics_HGSMIHostCmd_h */
diff --git a/include/VBox/Graphics/HGSMIMemAlloc.h b/include/VBox/Graphics/HGSMIMemAlloc.h
new file mode 100644
index 00000000..a837dc34
--- /dev/null
+++ b/include/VBox/Graphics/HGSMIMemAlloc.h
@@ -0,0 +1,113 @@
+/* $Id: HGSMIMemAlloc.h $ */
+/** @file
+ * VBox Host Guest Shared Memory Interface (HGSMI) - Memory allocator.
+ */
+
+/*
+ * Copyright (C) 2014-2022 Oracle and/or its affiliates.
+ *
+ * This file is part of VirtualBox base platform packages, as
+ * available from https://www.virtualbox.org.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, in version 3 of the
+ * License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses>.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
+ * in the VirtualBox distribution, in which case the provisions of the
+ * CDDL are applicable instead of those of the GPL.
+ *
+ * You may elect to license modified versions of this file under the
+ * terms and conditions of either the GPL or the CDDL or both.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
+ */
+
+#ifndef VBOX_INCLUDED_Graphics_HGSMIMemAlloc_h
+#define VBOX_INCLUDED_Graphics_HGSMIMemAlloc_h
+#ifndef RT_WITHOUT_PRAGMA_ONCE
+# pragma once
+#endif
+
+#include "HGSMIDefs.h"
+#include "VBoxVideoIPRT.h"
+
+
+/* Descriptor. */
+#define HGSMI_MA_DESC_OFFSET_MASK UINT32_C(0xFFFFFFE0)
+#define HGSMI_MA_DESC_FREE_MASK   UINT32_C(0x00000010)
+#define HGSMI_MA_DESC_ORDER_MASK  UINT32_C(0x0000000F)
+
+#define HGSMI_MA_DESC_OFFSET(d)  ((d) & HGSMI_MA_DESC_OFFSET_MASK)
+#define HGSMI_MA_DESC_IS_FREE(d) (((d) & HGSMI_MA_DESC_FREE_MASK) != 0)
+#define HGSMI_MA_DESC_ORDER(d)   ((d) & HGSMI_MA_DESC_ORDER_MASK)
+
+#define HGSMI_MA_DESC_ORDER_BASE UINT32_C(5)
+
+#define HGSMI_MA_BLOCK_SIZE_MIN (UINT32_C(1) << (HGSMI_MA_DESC_ORDER_BASE + 0))
+#define HGSMI_MA_BLOCK_SIZE_MAX (UINT32_C(1) << (HGSMI_MA_DESC_ORDER_BASE + HGSMI_MA_DESC_ORDER_MASK))
+
+/* HGSMI_MA_DESC_ORDER_BASE must correspond to HGSMI_MA_DESC_OFFSET_MASK. */
+AssertCompile((~HGSMI_MA_DESC_OFFSET_MASK + 1) == HGSMI_MA_BLOCK_SIZE_MIN);
+
+
+typedef struct HGSMIMABLOCK
+{
+    RTLISTNODE nodeBlock;
+    RTLISTNODE nodeFree;
+    HGSMIOFFSET descriptor;
+} HGSMIMABLOCK;
+
+typedef struct HGSMIMADATA
+{
+    HGSMIAREA area;
+    HGSMIENV env;
+    HGSMISIZE cbMaxBlock;
+
+    uint32_t cBlocks;                                           /* How many blocks in the listBlocks. */
+    RTLISTANCHOR listBlocks;                                    /* All memory blocks, sorted. */
+    RTLISTANCHOR aListFreeBlocks[HGSMI_MA_DESC_ORDER_MASK + 1]; /* For free blocks of each order. */
+} HGSMIMADATA;
+
+RT_C_DECLS_BEGIN
+
+int HGSMIMAInit(HGSMIMADATA *pMA, const HGSMIAREA *pArea,
+                HGSMIOFFSET *paDescriptors, uint32_t cDescriptors, HGSMISIZE cbMaxBlock,
+                const HGSMIENV *pEnv);
+void HGSMIMAUninit(HGSMIMADATA *pMA);
+
+void RT_UNTRUSTED_VOLATILE_HSTGST *HGSMIMAAlloc(HGSMIMADATA *pMA, HGSMISIZE cb);
+void HGSMIMAFree(HGSMIMADATA *pMA, void RT_UNTRUSTED_VOLATILE_GUEST *pv);
+
+HGSMIMABLOCK *HGSMIMASearchOffset(HGSMIMADATA *pMA, HGSMIOFFSET off);
+
+uint32_t HGSMIPopCnt32(uint32_t u32);
+
+DECLINLINE(HGSMISIZE) HGSMIMAOrder2Size(HGSMIOFFSET order)
+{
+    return (UINT32_C(1) << (HGSMI_MA_DESC_ORDER_BASE + order));
+}
+
+DECLINLINE(HGSMIOFFSET) HGSMIMASize2Order(HGSMISIZE cb)
+{
+    HGSMIOFFSET order = HGSMIPopCnt32(cb - 1) - HGSMI_MA_DESC_ORDER_BASE;
+#ifdef HGSMI_STRICT
+    Assert(HGSMIMAOrder2Size(order) == cb);
+#endif
+    return order;
+}
+
+RT_C_DECLS_END
+
+#endif /* !VBOX_INCLUDED_Graphics_HGSMIMemAlloc_h */
diff --git a/include/VBox/Graphics/Makefile.kup b/include/VBox/Graphics/Makefile.kup
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/include/VBox/Graphics/Makefile.kup
diff --git a/include/VBox/Graphics/VBoxUhgsmi.h b/include/VBox/Graphics/VBoxUhgsmi.h
new file mode 100644
index 00000000..8f1328e2
--- /dev/null
+++ b/include/VBox/Graphics/VBoxUhgsmi.h
@@ -0,0 +1,145 @@
+/* $Id: VBoxUhgsmi.h $ */
+/** @file
+ * Document me, pretty please.
+ */
+
+/*
+ * Copyright (C) 2010-2022 Oracle and/or its affiliates.
+ *
+ * This file is part of VirtualBox base platform packages, as
+ * available from https://www.virtualbox.org.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, in version 3 of the
+ * License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses>.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
+ * in the VirtualBox distribution, in which case the provisions of the
+ * CDDL are applicable instead of those of the GPL.
+ *
+ * You may elect to license modified versions of this file under the
+ * terms and conditions of either the GPL or the CDDL or both.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
+ */
+
+#ifndef VBOX_INCLUDED_Graphics_VBoxUhgsmi_h
+#define VBOX_INCLUDED_Graphics_VBoxUhgsmi_h
+#ifndef RT_WITHOUT_PRAGMA_ONCE
+# pragma once
+#endif
+
+#include <iprt/cdefs.h>
+#include <iprt/types.h>
+
+typedef struct VBOXUHGSMI *PVBOXUHGSMI;
+
+typedef struct VBOXUHGSMI_BUFFER *PVBOXUHGSMI_BUFFER;
+
+typedef union VBOXUHGSMI_BUFFER_TYPE_FLAGS
+{
+    uint32_t Value;
+    struct
+    {
+        uint32_t fCommand       : 1;
+        uint32_t Reserved       : 31;
+    } s;
+} VBOXUHGSMI_BUFFER_TYPE_FLAGS;
+
+typedef union VBOXUHGSMI_BUFFER_LOCK_FLAGS
+{
+    uint32_t Value;
+    struct
+    {
+        uint32_t fReadOnly      : 1;
+        uint32_t fWriteOnly     : 1;
+        uint32_t fDonotWait     : 1;
+        uint32_t fDiscard       : 1;
+        uint32_t fLockEntire    : 1;
+        uint32_t Reserved       : 27;
+    } s;
+} VBOXUHGSMI_BUFFER_LOCK_FLAGS;
+
+typedef union VBOXUHGSMI_BUFFER_SUBMIT_FLAGS
+{
+    uint32_t Value;
+    struct
+    {
+        uint32_t fHostReadOnly  : 1;
+        uint32_t fHostWriteOnly : 1;
+        uint32_t fDoNotRetire   : 1; /**< the buffer will be used in a subsequent command */
+        uint32_t fEntireBuffer  : 1;
+        uint32_t Reserved       : 28;
+    } s;
+} VBOXUHGSMI_BUFFER_SUBMIT_FLAGS, *PVBOXUHGSMI_BUFFER_SUBMIT_FLAGS;
+
+/* the caller can specify NULL as a hSynch and specify a valid enmSynchType to make UHGSMI create a proper object itself,
+ *  */
+typedef DECLCALLBACKTYPE(int, FNVBOXUHGSMI_BUFFER_CREATE,(PVBOXUHGSMI pHgsmi, uint32_t cbBuf, VBOXUHGSMI_BUFFER_TYPE_FLAGS fType,
+                                                          PVBOXUHGSMI_BUFFER* ppBuf));
+typedef FNVBOXUHGSMI_BUFFER_CREATE *PFNVBOXUHGSMI_BUFFER_CREATE;
+
+typedef struct VBOXUHGSMI_BUFFER_SUBMIT
+{
+    PVBOXUHGSMI_BUFFER pBuf;
+    uint32_t offData;
+    uint32_t cbData;
+    VBOXUHGSMI_BUFFER_SUBMIT_FLAGS fFlags;
+} VBOXUHGSMI_BUFFER_SUBMIT, *PVBOXUHGSMI_BUFFER_SUBMIT;
+
+typedef DECLCALLBACKTYPE(int, FNVBOXUHGSMI_BUFFER_SUBMIT,(PVBOXUHGSMI pHgsmi, PVBOXUHGSMI_BUFFER_SUBMIT aBuffers,
+                                                          uint32_t cBuffers));
+typedef FNVBOXUHGSMI_BUFFER_SUBMIT *PFNVBOXUHGSMI_BUFFER_SUBMIT;
+
+typedef DECLCALLBACKTYPE(int, FNVBOXUHGSMI_BUFFER_DESTROY,(PVBOXUHGSMI_BUFFER pBuf));
+typedef FNVBOXUHGSMI_BUFFER_DESTROY *PFNVBOXUHGSMI_BUFFER_DESTROY;
+
+typedef DECLCALLBACKTYPE(int, FNVBOXUHGSMI_BUFFER_LOCK,(PVBOXUHGSMI_BUFFER pBuf, uint32_t offLock, uint32_t cbLock,
+                                                        VBOXUHGSMI_BUFFER_LOCK_FLAGS fFlags, void**pvLock));
+typedef FNVBOXUHGSMI_BUFFER_LOCK *PFNVBOXUHGSMI_BUFFER_LOCK;
+
+typedef DECLCALLBACKTYPE(int, FNVBOXUHGSMI_BUFFER_UNLOCK,(PVBOXUHGSMI_BUFFER pBuf));
+typedef FNVBOXUHGSMI_BUFFER_UNLOCK *PFNVBOXUHGSMI_BUFFER_UNLOCK;
+
+typedef struct VBOXUHGSMI
+{
+    PFNVBOXUHGSMI_BUFFER_CREATE pfnBufferCreate;
+    PFNVBOXUHGSMI_BUFFER_SUBMIT pfnBufferSubmit;
+    /** User custom data. */
+    void *pvUserData;
+} VBOXUHGSMI;
+
+typedef struct VBOXUHGSMI_BUFFER
+{
+    PFNVBOXUHGSMI_BUFFER_LOCK pfnLock;
+    PFNVBOXUHGSMI_BUFFER_UNLOCK pfnUnlock;
+    PFNVBOXUHGSMI_BUFFER_DESTROY pfnDestroy;
+
+    /* r/o data added for ease of access and simplicity
+     * modifying it leads to unpredictable behavior */
+    VBOXUHGSMI_BUFFER_TYPE_FLAGS fType;
+    uint32_t cbBuffer;
+    /** User custom data. */
+    void *pvUserData;
+} VBOXUHGSMI_BUFFER;
+
+#define VBoxUhgsmiBufferCreate(_pUhgsmi, _cbBuf, _fType, _ppBuf) ((_pUhgsmi)->pfnBufferCreate(_pUhgsmi, _cbBuf, _fType, _ppBuf))
+#define VBoxUhgsmiBufferSubmit(_pUhgsmi, _aBuffers, _cBuffers) ((_pUhgsmi)->pfnBufferSubmit(_pUhgsmi, _aBuffers, _cBuffers))
+
+#define VBoxUhgsmiBufferLock(_pBuf, _offLock, _cbLock, _fFlags, _pvLock) ((_pBuf)->pfnLock(_pBuf, _offLock, _cbLock, _fFlags, _pvLock))
+#define VBoxUhgsmiBufferUnlock(_pBuf) ((_pBuf)->pfnUnlock(_pBuf))
+#define VBoxUhgsmiBufferDestroy(_pBuf) ((_pBuf)->pfnDestroy(_pBuf))
+
+#endif /* !VBOX_INCLUDED_Graphics_VBoxUhgsmi_h */
+
diff --git a/include/VBox/Graphics/VBoxVideo.h b/include/VBox/Graphics/VBoxVideo.h
new file mode 100644
index 00000000..ca779315
--- /dev/null
+++ b/include/VBox/Graphics/VBoxVideo.h
@@ -0,0 +1,1490 @@
+/* $Id: VBoxVideo.h $ */
+/** @file
+ * VirtualBox Video interface.
+ */
+
+/*
+ * Copyright (C) 2006-2022 Oracle and/or its affiliates.
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following
+ * conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef VBOX_INCLUDED_Graphics_VBoxVideo_h
+#define VBOX_INCLUDED_Graphics_VBoxVideo_h
+#ifndef RT_WITHOUT_PRAGMA_ONCE
+# pragma once
+#endif
+
+#include "VBoxVideoIPRT.h"
+
+/* this should be in sync with monitorCount <xsd:maxInclusive value="64"/> in src/VBox/Main/xml/VirtualBox-settings-common.xsd */
+#define VBOX_VIDEO_MAX_SCREENS 64
+
+/*
+ * The last 4096 bytes of the guest VRAM contains the generic info for all
+ * DualView chunks: sizes and offsets of chunks. This is filled by miniport.
+ *
+ * Last 4096 bytes of each chunk contain chunk specific data: framebuffer info,
+ * etc. This is used exclusively by the corresponding instance of a display driver.
+ *
+ * The VRAM layout:
+ *     Last 4096 bytes - Adapter information area.
+ *     4096 bytes aligned miniport heap (value specified in the config rouded up).
+ *     Slack - what left after dividing the VRAM.
+ *     4096 bytes aligned framebuffers:
+ *       last 4096 bytes of each framebuffer is the display information area.
+ *
+ * The Virtual Graphics Adapter information in the guest VRAM is stored by the
+ * guest video driver using structures prepended by VBOXVIDEOINFOHDR.
+ *
+ * When the guest driver writes dword 0 to the VBE_DISPI_INDEX_VBOX_VIDEO
+ * the host starts to process the info. The first element at the start of
+ * the 4096 bytes region should be normally be a LINK that points to
+ * actual information chain. That way the guest driver can have some
+ * fixed layout of the information memory block and just rewrite
+ * the link to point to relevant memory chain.
+ *
+ * The processing stops at the END element.
+ *
+ * The host can access the memory only when the port IO is processed.
+ * All data that will be needed later must be copied from these 4096 bytes.
+ * But other VRAM can be used by host until the mode is disabled.
+ *
+ * The guest driver writes dword 0xffffffff to the VBE_DISPI_INDEX_VBOX_VIDEO
+ * to disable the mode.
+ *
+ * VBE_DISPI_INDEX_VBOX_VIDEO is used to read the configuration information
+ * from the host and issue commands to the host.
+ *
+ * The guest writes the VBE_DISPI_INDEX_VBOX_VIDEO index register, the the
+ * following operations with the VBE data register can be performed:
+ *
+ * Operation            Result
+ * write 16 bit value   NOP
+ * read 16 bit value    count of monitors
+ * write 32 bit value   sets the vbox command value and the command processed by the host
+ * read 32 bit value    result of the last vbox command is returned
+ */
+
+#define VBOX_VIDEO_PRIMARY_SCREEN 0
+#define VBOX_VIDEO_NO_SCREEN ~0
+
+/**
+ * VBVA command header.
+ *
+ * @todo Where does this fit in?
+ */
+typedef struct VBVACMDHDR
+{
+   /** Coordinates of affected rectangle. */
+   int16_t x;
+   int16_t y;
+   uint16_t w;
+   uint16_t h;
+} VBVACMDHDR;
+AssertCompileSize(VBVACMDHDR, 8);
+
+/** @name VBVA ring defines.
+ *
+ * The VBVA ring buffer is suitable for transferring large (< 2GB) amount of
+ * data. For example big bitmaps which do not fit to the buffer.
+ *
+ * Guest starts writing to the buffer by initializing a record entry in the
+ * aRecords queue. VBVA_F_RECORD_PARTIAL indicates that the record is being
+ * written. As data is written to the ring buffer, the guest increases off32End
+ * for the record.
+ *
+ * The host reads the aRecords on flushes and processes all completed records.
+ * When host encounters situation when only a partial record presents and
+ * cbRecord & ~VBVA_F_RECORD_PARTIAL >= VBVA_RING_BUFFER_SIZE -
+ * VBVA_RING_BUFFER_THRESHOLD, the host fetched all record data and updates
+ * off32Head. After that on each flush the host continues fetching the data
+ * until the record is completed.
+ *
+ */
+#define VBVA_RING_BUFFER_SIZE        (_4M - _1K)
+#define VBVA_RING_BUFFER_THRESHOLD   (4 * _1K)
+
+#define VBVA_MAX_RECORDS (64)
+
+#define VBVA_F_MODE_ENABLED         UINT32_C(0x00000001)
+#define VBVA_F_MODE_VRDP            UINT32_C(0x00000002)
+#define VBVA_F_MODE_VRDP_RESET      UINT32_C(0x00000004)
+#define VBVA_F_MODE_VRDP_ORDER_MASK UINT32_C(0x00000008)
+
+#define VBVA_F_STATE_PROCESSING     UINT32_C(0x00010000)
+
+#define VBVA_F_RECORD_PARTIAL       UINT32_C(0x80000000)
+
+/**
+ * VBVA record.
+ */
+typedef struct VBVARECORD
+{
+    /** The length of the record. Changed by guest. */
+    uint32_t cbRecord;
+} VBVARECORD;
+AssertCompileSize(VBVARECORD, 4);
+
+/* The size of the information. */
+/*
+ * The minimum HGSMI heap size is PAGE_SIZE (4096 bytes) and is a restriction of the
+ * runtime heapsimple API. Use minimum 2 pages here, because the info area also may
+ * contain other data (for example HGSMIHOSTFLAGS structure).
+ */
+#ifndef VBOX_XPDM_MINIPORT
+# define VBVA_ADAPTER_INFORMATION_SIZE (64*_1K)
+#else
+#define VBVA_ADAPTER_INFORMATION_SIZE  (16*_1K)
+#define VBVA_DISPLAY_INFORMATION_SIZE  (64*_1K)
+#endif
+#define VBVA_MIN_BUFFER_SIZE           (64*_1K)
+
+
+/* The value for port IO to let the adapter to interpret the adapter memory. */
+#define VBOX_VIDEO_DISABLE_ADAPTER_MEMORY        0xFFFFFFFF
+
+/* The value for port IO to let the adapter to interpret the adapter memory. */
+#define VBOX_VIDEO_INTERPRET_ADAPTER_MEMORY      0x00000000
+
+/* The value for port IO to let the adapter to interpret the display memory.
+ * The display number is encoded in low 16 bits.
+ */
+#define VBOX_VIDEO_INTERPRET_DISPLAY_MEMORY_BASE 0x00010000
+
+
+/* The end of the information. */
+#define VBOX_VIDEO_INFO_TYPE_END          0
+/* Instructs the host to fetch the next VBOXVIDEOINFOHDR at the given offset of VRAM. */
+#define VBOX_VIDEO_INFO_TYPE_LINK         1
+/* Information about a display memory position. */
+#define VBOX_VIDEO_INFO_TYPE_DISPLAY      2
+/* Information about a screen. */
+#define VBOX_VIDEO_INFO_TYPE_SCREEN       3
+/* Information about host notifications for the driver. */
+#define VBOX_VIDEO_INFO_TYPE_HOST_EVENTS  4
+/* Information about non-volatile guest VRAM heap. */
+#define VBOX_VIDEO_INFO_TYPE_NV_HEAP      5
+/* VBVA enable/disable. */
+#define VBOX_VIDEO_INFO_TYPE_VBVA_STATUS  6
+/* VBVA flush. */
+#define VBOX_VIDEO_INFO_TYPE_VBVA_FLUSH   7
+/* Query configuration value. */
+#define VBOX_VIDEO_INFO_TYPE_QUERY_CONF32 8
+
+
+#pragma pack(1)
+typedef struct VBOXVIDEOINFOHDR
+{
+    uint8_t u8Type;
+    uint8_t u8Reserved;
+    uint16_t u16Length;
+} VBOXVIDEOINFOHDR;
+
+
+typedef struct VBOXVIDEOINFOLINK
+{
+    /* Relative offset in VRAM */
+    int32_t i32Offset;
+} VBOXVIDEOINFOLINK;
+
+
+/* Resides in adapter info memory. Describes a display VRAM chunk. */
+typedef struct VBOXVIDEOINFODISPLAY
+{
+    /* Index of the framebuffer assigned by guest. */
+    uint32_t u32Index;
+
+    /* Absolute offset in VRAM of the framebuffer to be displayed on the monitor. */
+    uint32_t u32Offset;
+
+    /* The size of the memory that can be used for the screen. */
+    uint32_t u32FramebufferSize;
+
+    /* The size of the memory that is used for the Display information.
+     * The information is at u32Offset + u32FramebufferSize
+     */
+    uint32_t u32InformationSize;
+
+} VBOXVIDEOINFODISPLAY;
+
+
+/* Resides in display info area, describes the current video mode. */
+#define VBOX_VIDEO_INFO_SCREEN_F_NONE   0x00
+#define VBOX_VIDEO_INFO_SCREEN_F_ACTIVE 0x01
+
+typedef struct VBOXVIDEOINFOSCREEN
+{
+    /* Physical X origin relative to the primary screen. */
+    int32_t xOrigin;
+
+    /* Physical Y origin relative to the primary screen. */
+    int32_t yOrigin;
+
+    /* The scan line size in bytes. */
+    uint32_t u32LineSize;
+
+    /* Width of the screen. */
+    uint16_t u16Width;
+
+    /* Height of the screen. */
+    uint16_t u16Height;
+
+    /* Color depth. */
+    uint8_t bitsPerPixel;
+
+    /* VBOX_VIDEO_INFO_SCREEN_F_* */
+    uint8_t u8Flags;
+} VBOXVIDEOINFOSCREEN;
+
+/* The guest initializes the structure to 0. The positions of the structure in the
+ * display info area must not be changed, host will update the structure. Guest checks
+ * the events and modifies the structure as a response to host.
+ */
+#define VBOX_VIDEO_INFO_HOST_EVENTS_F_NONE        0x00000000
+#define VBOX_VIDEO_INFO_HOST_EVENTS_F_VRDP_RESET  0x00000080
+
+typedef struct VBOXVIDEOINFOHOSTEVENTS
+{
+    /* Host events. */
+    uint32_t fu32Events;
+} VBOXVIDEOINFOHOSTEVENTS;
+
+/* Resides in adapter info memory. Describes the non-volatile VRAM heap. */
+typedef struct VBOXVIDEOINFONVHEAP
+{
+    /* Absolute offset in VRAM of the start of the heap. */
+    uint32_t u32HeapOffset;
+
+    /* The size of the heap. */
+    uint32_t u32HeapSize;
+
+} VBOXVIDEOINFONVHEAP;
+
+/* Display information area. */
+typedef struct VBOXVIDEOINFOVBVASTATUS
+{
+    /* Absolute offset in VRAM of the start of the VBVA QUEUE. 0 to disable VBVA. */
+    uint32_t u32QueueOffset;
+
+    /* The size of the VBVA QUEUE. 0 to disable VBVA. */
+    uint32_t u32QueueSize;
+
+} VBOXVIDEOINFOVBVASTATUS;
+
+typedef struct VBOXVIDEOINFOVBVAFLUSH
+{
+    uint32_t u32DataStart;
+
+    uint32_t u32DataEnd;
+
+} VBOXVIDEOINFOVBVAFLUSH;
+
+#define VBOX_VIDEO_QCI32_MONITOR_COUNT       0
+#define VBOX_VIDEO_QCI32_OFFSCREEN_HEAP_SIZE 1
+
+typedef struct VBOXVIDEOINFOQUERYCONF32
+{
+    uint32_t u32Index;
+
+    uint32_t u32Value;
+
+} VBOXVIDEOINFOQUERYCONF32;
+#pragma pack()
+
+#ifdef VBOX_WITH_VIDEOHWACCEL
+#pragma pack(1)
+
+#define VBOXVHWA_VERSION_MAJ 0
+#define VBOXVHWA_VERSION_MIN 0
+#define VBOXVHWA_VERSION_BLD 6
+#define VBOXVHWA_VERSION_RSV 0
+
+typedef enum
+{
+    VBOXVHWACMD_TYPE_SURF_CANCREATE = 1,
+    VBOXVHWACMD_TYPE_SURF_CREATE,
+    VBOXVHWACMD_TYPE_SURF_DESTROY,
+    VBOXVHWACMD_TYPE_SURF_LOCK,
+    VBOXVHWACMD_TYPE_SURF_UNLOCK,
+    VBOXVHWACMD_TYPE_SURF_BLT,
+    VBOXVHWACMD_TYPE_SURF_FLIP,
+    VBOXVHWACMD_TYPE_SURF_OVERLAY_UPDATE,
+    VBOXVHWACMD_TYPE_SURF_OVERLAY_SETPOSITION,
+    VBOXVHWACMD_TYPE_SURF_COLORKEY_SET,
+    VBOXVHWACMD_TYPE_QUERY_INFO1,
+    VBOXVHWACMD_TYPE_QUERY_INFO2,
+    VBOXVHWACMD_TYPE_ENABLE,
+    VBOXVHWACMD_TYPE_DISABLE,
+    VBOXVHWACMD_TYPE_HH_CONSTRUCT,
+    VBOXVHWACMD_TYPE_HH_RESET
+#ifdef VBOX_WITH_WDDM
+    , VBOXVHWACMD_TYPE_SURF_GETINFO
+    , VBOXVHWACMD_TYPE_SURF_COLORFILL
+#endif
+    , VBOXVHWACMD_TYPE_HH_DISABLE
+    , VBOXVHWACMD_TYPE_HH_ENABLE
+    , VBOXVHWACMD_TYPE_HH_SAVESTATE_SAVEBEGIN
+    , VBOXVHWACMD_TYPE_HH_SAVESTATE_SAVEEND
+    , VBOXVHWACMD_TYPE_HH_SAVESTATE_SAVEPERFORM
+    , VBOXVHWACMD_TYPE_HH_SAVESTATE_LOADPERFORM
+} VBOXVHWACMD_TYPE;
+
+/** The command processing was asynch, set by the host to indicate asynch
+ * command completion. Must not be cleared once set, the command completion is
+ * performed by issuing a host->guest completion command while keeping this
+ * flag unchanged */
+#define VBOXVHWACMD_FLAG_HG_ASYNCH               UINT32_C(0x00010000)
+/** asynch completion is performed by issuing the event */
+#define VBOXVHWACMD_FLAG_GH_ASYNCH_EVENT         UINT32_C(0x00000001)
+/** issue interrupt on asynch completion */
+#define VBOXVHWACMD_FLAG_GH_ASYNCH_IRQ           UINT32_C(0x00000002)
+/** Guest does not do any op on completion of this command, the host may copy
+ * the command and indicate that it does not need the command anymore
+ * by setting the VBOXVHWACMD_FLAG_HG_ASYNCH_RETURNED flag */
+#define VBOXVHWACMD_FLAG_GH_ASYNCH_NOCOMPLETION  UINT32_C(0x00000004)
+/** the host has copied the VBOXVHWACMD_FLAG_GH_ASYNCH_NOCOMPLETION command and returned it to the guest */
+#define VBOXVHWACMD_FLAG_HG_ASYNCH_RETURNED      UINT32_C(0x00020000)
+/** this is the host->host cmd, i.e. a configuration command posted by the host to the framebuffer */
+#define VBOXVHWACMD_FLAG_HH_CMD                  UINT32_C(0x10000000)
+
+typedef struct VBOXVHWACMD
+{
+    VBOXVHWACMD_TYPE enmCmd;     /**< command type */
+    volatile int32_t rc;         /**< command result */
+    int32_t iDisplay;            /**< display index */
+    volatile int32_t Flags;      /**< ORed VBOXVHWACMD_FLAG_xxx values */
+    uint64_t GuestVBVAReserved1; /**< field internally used by the guest VBVA cmd handling, must NOT be modified by clients */
+    uint64_t GuestVBVAReserved2; /**< field internally used by the guest VBVA cmd handling, must NOT be modified by clients */
+    volatile uint32_t cRefs;
+    int32_t Reserved;
+    union
+    {
+        struct VBOXVHWACMD *pNext;
+        uint32_t            offNext;
+        uint64_t Data;                  /**< the body is 64-bit aligned */
+    } u;
+    char body[1];
+} VBOXVHWACMD;
+
+#define VBOXVHWACMD_HEADSIZE()                          (RT_OFFSETOF(VBOXVHWACMD, body))
+#define VBOXVHWACMD_SIZE_FROMBODYSIZE(a_cbBody)         (VBOXVHWACMD_HEADSIZE() + (a_cbBody))
+#define VBOXVHWACMD_SIZE(a_tTypeCmd)                    (VBOXVHWACMD_SIZE_FROMBODYSIZE(sizeof(a_tTypeCmd)))
+typedef unsigned int VBOXVHWACMD_LENGTH;
+typedef uint64_t VBOXVHWA_SURFHANDLE;
+#define VBOXVHWA_SURFHANDLE_INVALID                     UINT64_C(0)
+#define VBOXVHWACMD_BODY(a_pHdr, a_TypeBody)            ( (a_TypeBody RT_UNTRUSTED_VOLATILE_HSTGST *)&(a_pHdr)->body[0] )
+#if !defined(IN_GUEST) && defined(IN_RING3)
+# define VBOXVHWACMD_BODY_HOST_HEAP(a_pHdr, a_TypeBody) ( (a_TypeBody *)&(a_pHdr)->body[0] )
+#endif
+#define VBOXVHWACMD_HEAD(a_pBody)\
+    ( (VBOXVHWACMD RT_UNTRUSTED_VOLATILE_HSTGST *)((uint8_t *)(a_pBody) - RT_OFFSETOF(VBOXVHWACMD, body)))
+
+typedef struct VBOXVHWA_RECTL
+{
+    int32_t left;
+    int32_t top;
+    int32_t right;
+    int32_t bottom;
+} VBOXVHWA_RECTL;
+
+typedef struct VBOXVHWA_COLORKEY
+{
+    uint32_t low;
+    uint32_t high;
+} VBOXVHWA_COLORKEY;
+
+typedef struct VBOXVHWA_PIXELFORMAT
+{
+    uint32_t flags;
+    uint32_t fourCC;
+    union
+    {
+        uint32_t rgbBitCount;
+        uint32_t yuvBitCount;
+    } c;
+
+    union
+    {
+        uint32_t rgbRBitMask;
+        uint32_t yuvYBitMask;
+    } m1;
+
+    union
+    {
+        uint32_t rgbGBitMask;
+        uint32_t yuvUBitMask;
+    } m2;
+
+    union
+    {
+        uint32_t rgbBBitMask;
+        uint32_t yuvVBitMask;
+    } m3;
+
+    union
+    {
+        uint32_t rgbABitMask;
+    } m4;
+
+    uint32_t Reserved;
+} VBOXVHWA_PIXELFORMAT;
+
+typedef struct VBOXVHWA_SURFACEDESC
+{
+    uint32_t flags;
+    uint32_t height;
+    uint32_t width;
+    uint32_t pitch;
+    uint32_t sizeX;
+    uint32_t sizeY;
+    uint32_t cBackBuffers;
+    uint32_t Reserved;
+    VBOXVHWA_COLORKEY DstOverlayCK;
+    VBOXVHWA_COLORKEY DstBltCK;
+    VBOXVHWA_COLORKEY SrcOverlayCK;
+    VBOXVHWA_COLORKEY SrcBltCK;
+    VBOXVHWA_PIXELFORMAT PixelFormat;
+    uint32_t surfCaps;
+    uint32_t Reserved2;
+    VBOXVHWA_SURFHANDLE hSurf;
+    uint64_t offSurface;
+} VBOXVHWA_SURFACEDESC;
+
+typedef struct VBOXVHWA_BLTFX
+{
+    uint32_t flags;
+    uint32_t rop;
+    uint32_t rotationOp;
+    uint32_t rotation;
+    uint32_t fillColor;
+    uint32_t Reserved;
+    VBOXVHWA_COLORKEY DstCK;
+    VBOXVHWA_COLORKEY SrcCK;
+} VBOXVHWA_BLTFX;
+
+typedef struct VBOXVHWA_OVERLAYFX
+{
+    uint32_t flags;
+    uint32_t Reserved1;
+    uint32_t fxFlags;
+    uint32_t Reserved2;
+    VBOXVHWA_COLORKEY DstCK;
+    VBOXVHWA_COLORKEY SrcCK;
+} VBOXVHWA_OVERLAYFX;
+
+#define VBOXVHWA_CAPS_BLT               0x00000040
+#define VBOXVHWA_CAPS_BLTCOLORFILL      0x04000000
+#define VBOXVHWA_CAPS_BLTFOURCC         0x00000100
+#define VBOXVHWA_CAPS_BLTSTRETCH        0x00000200
+#define VBOXVHWA_CAPS_BLTQUEUE          0x00000080
+
+#define VBOXVHWA_CAPS_OVERLAY           0x00000800
+#define VBOXVHWA_CAPS_OVERLAYFOURCC     0x00002000
+#define VBOXVHWA_CAPS_OVERLAYSTRETCH    0x00004000
+#define VBOXVHWA_CAPS_OVERLAYCANTCLIP   0x00001000
+
+#define VBOXVHWA_CAPS_COLORKEY          0x00400000
+#define VBOXVHWA_CAPS_COLORKEYHWASSIST  0x01000000
+
+#define VBOXVHWA_SCAPS_BACKBUFFER       0x00000004
+#define VBOXVHWA_SCAPS_COMPLEX          0x00000008
+#define VBOXVHWA_SCAPS_FLIP             0x00000010
+#define VBOXVHWA_SCAPS_FRONTBUFFER      0x00000020
+#define VBOXVHWA_SCAPS_OFFSCREENPLAIN   0x00000040
+#define VBOXVHWA_SCAPS_OVERLAY          0x00000080
+#define VBOXVHWA_SCAPS_PRIMARYSURFACE   0x00000200
+#define VBOXVHWA_SCAPS_SYSTEMMEMORY     0x00000800
+#define VBOXVHWA_SCAPS_VIDEOMEMORY      0x00004000
+#define VBOXVHWA_SCAPS_VISIBLE          0x00008000
+#define VBOXVHWA_SCAPS_LOCALVIDMEM      0x10000000
+
+#define VBOXVHWA_PF_PALETTEINDEXED8     0x00000020
+#define VBOXVHWA_PF_RGB                 0x00000040
+#define VBOXVHWA_PF_RGBTOYUV            0x00000100
+#define VBOXVHWA_PF_YUV                 0x00000200
+#define VBOXVHWA_PF_FOURCC              0x00000004
+
+#define VBOXVHWA_LOCK_DISCARDCONTENTS   0x00002000
+
+#define VBOXVHWA_CFG_ENABLED            0x00000001
+
+#define VBOXVHWA_SD_BACKBUFFERCOUNT     0x00000020
+#define VBOXVHWA_SD_CAPS                0x00000001
+#define VBOXVHWA_SD_CKDESTBLT           0x00004000
+#define VBOXVHWA_SD_CKDESTOVERLAY       0x00002000
+#define VBOXVHWA_SD_CKSRCBLT            0x00010000
+#define VBOXVHWA_SD_CKSRCOVERLAY        0x00008000
+#define VBOXVHWA_SD_HEIGHT              0x00000002
+#define VBOXVHWA_SD_PITCH               0x00000008
+#define VBOXVHWA_SD_PIXELFORMAT         0x00001000
+/*#define VBOXVHWA_SD_REFRESHRATE       0x00040000*/
+#define VBOXVHWA_SD_WIDTH               0x00000004
+
+#define VBOXVHWA_CKEYCAPS_DESTBLT                  0x00000001
+#define VBOXVHWA_CKEYCAPS_DESTBLTCLRSPACE          0x00000002
+#define VBOXVHWA_CKEYCAPS_DESTBLTCLRSPACEYUV       0x00000004
+#define VBOXVHWA_CKEYCAPS_DESTBLTYUV               0x00000008
+#define VBOXVHWA_CKEYCAPS_DESTOVERLAY              0x00000010
+#define VBOXVHWA_CKEYCAPS_DESTOVERLAYCLRSPACE      0x00000020
+#define VBOXVHWA_CKEYCAPS_DESTOVERLAYCLRSPACEYUV   0x00000040
+#define VBOXVHWA_CKEYCAPS_DESTOVERLAYONEACTIVE     0x00000080
+#define VBOXVHWA_CKEYCAPS_DESTOVERLAYYUV           0x00000100
+#define VBOXVHWA_CKEYCAPS_SRCBLT                   0x00000200
+#define VBOXVHWA_CKEYCAPS_SRCBLTCLRSPACE           0x00000400
+#define VBOXVHWA_CKEYCAPS_SRCBLTCLRSPACEYUV        0x00000800
+#define VBOXVHWA_CKEYCAPS_SRCBLTYUV                0x00001000
+#define VBOXVHWA_CKEYCAPS_SRCOVERLAY               0x00002000
+#define VBOXVHWA_CKEYCAPS_SRCOVERLAYCLRSPACE       0x00004000
+#define VBOXVHWA_CKEYCAPS_SRCOVERLAYCLRSPACEYUV    0x00008000
+#define VBOXVHWA_CKEYCAPS_SRCOVERLAYONEACTIVE      0x00010000
+#define VBOXVHWA_CKEYCAPS_SRCOVERLAYYUV            0x00020000
+#define VBOXVHWA_CKEYCAPS_NOCOSTOVERLAY            0x00040000
+
+#define VBOXVHWA_BLT_COLORFILL                      0x00000400
+#define VBOXVHWA_BLT_DDFX                           0x00000800
+#define VBOXVHWA_BLT_EXTENDED_FLAGS                 0x40000000
+#define VBOXVHWA_BLT_EXTENDED_LINEAR_CONTENT        0x00000004
+#define VBOXVHWA_BLT_EXTENDED_PRESENTATION_STRETCHFACTOR 0x00000010
+#define VBOXVHWA_BLT_KEYDESTOVERRIDE                0x00004000
+#define VBOXVHWA_BLT_KEYSRCOVERRIDE                 0x00010000
+#define VBOXVHWA_BLT_LAST_PRESENTATION              0x20000000
+#define VBOXVHWA_BLT_PRESENTATION                   0x10000000
+#define VBOXVHWA_BLT_ROP                            0x00020000
+
+
+#define VBOXVHWA_OVER_DDFX                          0x00080000
+#define VBOXVHWA_OVER_HIDE                          0x00000200
+#define VBOXVHWA_OVER_KEYDEST                       0x00000400
+#define VBOXVHWA_OVER_KEYDESTOVERRIDE               0x00000800
+#define VBOXVHWA_OVER_KEYSRC                        0x00001000
+#define VBOXVHWA_OVER_KEYSRCOVERRIDE                0x00002000
+#define VBOXVHWA_OVER_SHOW                          0x00004000
+
+#define VBOXVHWA_CKEY_COLORSPACE                    0x00000001
+#define VBOXVHWA_CKEY_DESTBLT                       0x00000002
+#define VBOXVHWA_CKEY_DESTOVERLAY                   0x00000004
+#define VBOXVHWA_CKEY_SRCBLT                        0x00000008
+#define VBOXVHWA_CKEY_SRCOVERLAY                    0x00000010
+
+#define VBOXVHWA_BLT_ARITHSTRETCHY                  0x00000001
+#define VBOXVHWA_BLT_MIRRORLEFTRIGHT                0x00000002
+#define VBOXVHWA_BLT_MIRRORUPDOWN                   0x00000004
+
+#define VBOXVHWA_OVERFX_ARITHSTRETCHY               0x00000001
+#define VBOXVHWA_OVERFX_MIRRORLEFTRIGHT             0x00000002
+#define VBOXVHWA_OVERFX_MIRRORUPDOWN                0x00000004
+
+#define VBOXVHWA_CAPS2_CANRENDERWINDOWED            0x00080000
+#define VBOXVHWA_CAPS2_WIDESURFACES                 0x00001000
+#define VBOXVHWA_CAPS2_COPYFOURCC                   0x00008000
+/*#define VBOXVHWA_CAPS2_FLIPINTERVAL                 0x00200000*/
+/*#define VBOXVHWA_CAPS2_FLIPNOVSYNC                  0x00400000*/
+
+
+#define VBOXVHWA_OFFSET64_VOID        (UINT64_MAX)
+
+typedef struct VBOXVHWA_VERSION
+{
+    uint32_t maj;
+    uint32_t min;
+    uint32_t bld;
+    uint32_t reserved;
+} VBOXVHWA_VERSION;
+
+#define VBOXVHWA_VERSION_INIT(_pv) do { \
+        (_pv)->maj = VBOXVHWA_VERSION_MAJ; \
+        (_pv)->min = VBOXVHWA_VERSION_MIN; \
+        (_pv)->bld = VBOXVHWA_VERSION_BLD; \
+        (_pv)->reserved = VBOXVHWA_VERSION_RSV; \
+        } while(0)
+
+typedef struct VBOXVHWACMD_QUERYINFO1
+{
+    union
+    {
+        struct
+        {
+            VBOXVHWA_VERSION guestVersion;
+        } in;
+
+        struct
+        {
+            uint32_t cfgFlags;
+            uint32_t caps;
+
+            uint32_t caps2;
+            uint32_t colorKeyCaps;
+
+            uint32_t stretchCaps;
+            uint32_t surfaceCaps;
+
+            uint32_t numOverlays;
+            uint32_t curOverlays;
+
+            uint32_t numFourCC;
+            uint32_t reserved;
+        } out;
+    } u;
+} VBOXVHWACMD_QUERYINFO1;
+
+typedef struct VBOXVHWACMD_QUERYINFO2
+{
+    uint32_t numFourCC;
+    uint32_t FourCC[1];
+} VBOXVHWACMD_QUERYINFO2;
+
+#define VBOXVHWAINFO2_SIZE(_cFourCC) RT_UOFFSETOF_DYN(VBOXVHWACMD_QUERYINFO2, FourCC[_cFourCC])
+
+typedef struct VBOXVHWACMD_SURF_CANCREATE
+{
+    VBOXVHWA_SURFACEDESC SurfInfo;
+    union
+    {
+        struct
+        {
+            uint32_t bIsDifferentPixelFormat;
+            uint32_t Reserved;
+        } in;
+
+        struct
+        {
+            int32_t ErrInfo;
+        } out;
+    } u;
+} VBOXVHWACMD_SURF_CANCREATE;
+
+typedef struct VBOXVHWACMD_SURF_CREATE
+{
+    VBOXVHWA_SURFACEDESC SurfInfo;
+} VBOXVHWACMD_SURF_CREATE;
+
+#ifdef VBOX_WITH_WDDM
+typedef struct VBOXVHWACMD_SURF_GETINFO
+{
+    VBOXVHWA_SURFACEDESC SurfInfo;
+} VBOXVHWACMD_SURF_GETINFO;
+#endif
+
+typedef struct VBOXVHWACMD_SURF_DESTROY
+{
+    union
+    {
+        struct
+        {
+            VBOXVHWA_SURFHANDLE hSurf;
+        } in;
+    } u;
+} VBOXVHWACMD_SURF_DESTROY;
+
+typedef struct VBOXVHWACMD_SURF_LOCK
+{
+    union
+    {
+        struct
+        {
+            VBOXVHWA_SURFHANDLE hSurf;
+            uint64_t offSurface;
+            uint32_t flags;
+            uint32_t rectValid;
+            VBOXVHWA_RECTL rect;
+        } in;
+    } u;
+} VBOXVHWACMD_SURF_LOCK;
+
+typedef struct VBOXVHWACMD_SURF_UNLOCK
+{
+    union
+    {
+        struct
+        {
+            VBOXVHWA_SURFHANDLE hSurf;
+            uint32_t xUpdatedMemValid;
+            uint32_t reserved;
+            VBOXVHWA_RECTL xUpdatedMemRect;
+        } in;
+    } u;
+} VBOXVHWACMD_SURF_UNLOCK;
+
+typedef struct VBOXVHWACMD_SURF_BLT
+{
+    uint64_t DstGuestSurfInfo;
+    uint64_t SrcGuestSurfInfo;
+    union
+    {
+        struct
+        {
+            VBOXVHWA_SURFHANDLE hDstSurf;
+            uint64_t offDstSurface;
+            VBOXVHWA_RECTL dstRect;
+            VBOXVHWA_SURFHANDLE hSrcSurf;
+            uint64_t offSrcSurface;
+            VBOXVHWA_RECTL srcRect;
+            uint32_t flags;
+            uint32_t xUpdatedSrcMemValid;
+            VBOXVHWA_BLTFX desc;
+            VBOXVHWA_RECTL xUpdatedSrcMemRect;
+        } in;
+    } u;
+} VBOXVHWACMD_SURF_BLT;
+
+#ifdef VBOX_WITH_WDDM
+typedef struct VBOXVHWACMD_SURF_COLORFILL
+{
+    union
+    {
+        struct
+        {
+            VBOXVHWA_SURFHANDLE hSurf;
+            uint64_t offSurface;
+            uint32_t u32Reserved;
+            uint32_t cRects;
+            VBOXVHWA_RECTL aRects[1];
+        } in;
+    } u;
+} VBOXVHWACMD_SURF_COLORFILL;
+#endif
+
+typedef struct VBOXVHWACMD_SURF_FLIP
+{
+    uint64_t TargGuestSurfInfo;
+    uint64_t CurrGuestSurfInfo;
+    union
+    {
+        struct
+        {
+            VBOXVHWA_SURFHANDLE hTargSurf;
+            uint64_t offTargSurface;
+            VBOXVHWA_SURFHANDLE hCurrSurf;
+            uint64_t offCurrSurface;
+            uint32_t flags;
+            uint32_t xUpdatedTargMemValid;
+            VBOXVHWA_RECTL xUpdatedTargMemRect;
+        } in;
+    } u;
+} VBOXVHWACMD_SURF_FLIP;
+
+typedef struct VBOXVHWACMD_SURF_COLORKEY_SET
+{
+    union
+    {
+        struct
+        {
+            VBOXVHWA_SURFHANDLE hSurf;
+            uint64_t offSurface;
+            VBOXVHWA_COLORKEY CKey;
+            uint32_t flags;
+            uint32_t reserved;
+        } in;
+    } u;
+} VBOXVHWACMD_SURF_COLORKEY_SET;
+
+#define VBOXVHWACMD_SURF_OVERLAY_UPDATE_F_SRCMEMRECT 0x00000001
+#define VBOXVHWACMD_SURF_OVERLAY_UPDATE_F_DSTMEMRECT 0x00000002
+
+typedef struct VBOXVHWACMD_SURF_OVERLAY_UPDATE
+{
+    union
+    {
+        struct
+        {
+            VBOXVHWA_SURFHANDLE hDstSurf;
+            uint64_t offDstSurface;
+            VBOXVHWA_RECTL dstRect;
+            VBOXVHWA_SURFHANDLE hSrcSurf;
+            uint64_t offSrcSurface;
+            VBOXVHWA_RECTL srcRect;
+            uint32_t flags;
+            uint32_t xFlags;
+            VBOXVHWA_OVERLAYFX desc;
+            VBOXVHWA_RECTL xUpdatedSrcMemRect;
+            VBOXVHWA_RECTL xUpdatedDstMemRect;
+        } in;
+    } u;
+}VBOXVHWACMD_SURF_OVERLAY_UPDATE;
+
+typedef struct VBOXVHWACMD_SURF_OVERLAY_SETPOSITION
+{
+    union
+    {
+        struct
+        {
+            VBOXVHWA_SURFHANDLE hDstSurf;
+            uint64_t offDstSurface;
+            VBOXVHWA_SURFHANDLE hSrcSurf;
+            uint64_t offSrcSurface;
+            uint32_t xPos;
+            uint32_t yPos;
+            uint32_t flags;
+            uint32_t reserved;
+        } in;
+    } u;
+} VBOXVHWACMD_SURF_OVERLAY_SETPOSITION;
+
+typedef struct VBOXVHWACMD_HH_CONSTRUCT
+{
+    void    *pVM;
+    /* VRAM info for the backend to be able to properly translate VRAM offsets */
+    void    *pvVRAM;
+    uint32_t cbVRAM;
+} VBOXVHWACMD_HH_CONSTRUCT;
+
+typedef struct VBOXVHWACMD_HH_SAVESTATE_SAVEPERFORM
+{
+    struct SSMHANDLE * pSSM;
+} VBOXVHWACMD_HH_SAVESTATE_SAVEPERFORM;
+
+typedef struct VBOXVHWACMD_HH_SAVESTATE_LOADPERFORM
+{
+    struct SSMHANDLE * pSSM;
+} VBOXVHWACMD_HH_SAVESTATE_LOADPERFORM;
+
+typedef DECLCALLBACKTYPE(void, FNVBOXVHWA_HH_CALLBACK,(void *));
+typedef FNVBOXVHWA_HH_CALLBACK *PFNVBOXVHWA_HH_CALLBACK;
+
+#define VBOXVHWA_HH_CALLBACK_SET(_pCmd, _pfn, _parg) \
+    do { \
+        (_pCmd)->GuestVBVAReserved1 = (uint64_t)(uintptr_t)(_pfn); \
+        (_pCmd)->GuestVBVAReserved2 = (uint64_t)(uintptr_t)(_parg); \
+    }while(0)
+
+#define VBOXVHWA_HH_CALLBACK_GET(_pCmd) ((PFNVBOXVHWA_HH_CALLBACK)(_pCmd)->GuestVBVAReserved1)
+#define VBOXVHWA_HH_CALLBACK_GET_ARG(_pCmd) ((void*)(_pCmd)->GuestVBVAReserved2)
+
+#pragma pack()
+#endif /* #ifdef VBOX_WITH_VIDEOHWACCEL */
+
+/* All structures are without alignment. */
+#pragma pack(1)
+
+typedef struct VBVAHOSTFLAGS
+{
+    uint32_t u32HostEvents;
+    uint32_t u32SupportedOrders;
+} VBVAHOSTFLAGS;
+
+typedef struct VBVABUFFER
+{
+    VBVAHOSTFLAGS hostFlags;
+
+    /* The offset where the data start in the buffer. */
+    uint32_t off32Data;
+    /* The offset where next data must be placed in the buffer. */
+    uint32_t off32Free;
+
+    /* The queue of record descriptions. */
+    VBVARECORD aRecords[VBVA_MAX_RECORDS];
+    uint32_t indexRecordFirst;
+    uint32_t indexRecordFree;
+
+    /* Space to leave free in the buffer when large partial records are transferred. */
+    uint32_t cbPartialWriteThreshold;
+
+    uint32_t cbData;
+    uint8_t  au8Data[1]; /* variable size for the rest of the VBVABUFFER area in VRAM. */
+} VBVABUFFER;
+
+#define VBVA_MAX_RECORD_SIZE (128*_1M)
+
+/* guest->host commands */
+#define VBVA_QUERY_CONF32 1
+#define VBVA_SET_CONF32   2
+#define VBVA_INFO_VIEW    3
+#define VBVA_INFO_HEAP    4
+#define VBVA_FLUSH        5
+#define VBVA_INFO_SCREEN  6
+/** Enables or disables VBVA.  Enabling VBVA without disabling it before
+ * causes a complete screen update. */
+#define VBVA_ENABLE       7
+#define VBVA_MOUSE_POINTER_SHAPE 8
+#ifdef VBOX_WITH_VIDEOHWACCEL
+# define VBVA_VHWA_CMD    9
+#endif /* # ifdef VBOX_WITH_VIDEOHWACCEL */
+#ifdef VBOX_WITH_VDMA
+# define VBVA_VDMA_CTL   10 /* setup G<->H DMA channel info */
+# define VBVA_VDMA_CMD    11 /* G->H DMA command             */
+#endif
+#define VBVA_INFO_CAPS   12 /* informs host about HGSMI caps. see VBVACAPS below */
+#define VBVA_SCANLINE_CFG    13 /* configures scanline, see VBVASCANLINECFG below */
+#define VBVA_SCANLINE_INFO   14 /* requests scanline info, see VBVASCANLINEINFO below */
+#define VBVA_CMDVBVA_SUBMIT  16 /* inform host about VBVA Command submission */
+#define VBVA_CMDVBVA_FLUSH   17 /* inform host about VBVA Command submission */
+#define VBVA_CMDVBVA_CTL     18 /* G->H DMA command             */
+#define VBVA_QUERY_MODE_HINTS 19 /* Query most recent mode hints sent. */
+/** Report the guest virtual desktop position and size for mapping host and
+ * guest pointer positions. */
+#define VBVA_REPORT_INPUT_MAPPING 20
+/** Report the guest cursor position and query the host position. */
+#define VBVA_CURSOR_POSITION 21
+
+/* host->guest commands */
+#define VBVAHG_EVENT              1
+#define VBVAHG_DISPLAY_CUSTOM     2
+#ifdef VBOX_WITH_VDMA
+#define VBVAHG_SHGSMI_COMPLETION  3
+#endif
+
+#ifdef VBOX_WITH_VIDEOHWACCEL
+#define VBVAHG_DCUSTOM_VHWA_CMDCOMPLETE 1
+#pragma pack(1)
+typedef struct VBVAHOSTCMDVHWACMDCOMPLETE
+{
+    uint32_t offCmd;
+}VBVAHOSTCMDVHWACMDCOMPLETE;
+#pragma pack()
+#endif /* # ifdef VBOX_WITH_VIDEOHWACCEL */
+
+#pragma pack(1)
+typedef enum
+{
+    VBVAHOSTCMD_OP_EVENT = 1,
+    VBVAHOSTCMD_OP_CUSTOM
+}VBVAHOSTCMD_OP_TYPE;
+
+typedef struct VBVAHOSTCMDEVENT
+{
+    uint64_t pEvent;
+}VBVAHOSTCMDEVENT;
+
+
+typedef struct VBVAHOSTCMD
+{
+    /* destination ID if >=0 specifies display index, otherwize the command is directed to the miniport */
+    int32_t iDstID;
+    int32_t customOpCode;
+    union
+    {
+        struct VBVAHOSTCMD *pNext;
+        uint32_t             offNext;
+        uint64_t Data; /* the body is 64-bit aligned */
+    } u;
+    char body[1];
+} VBVAHOSTCMD;
+
+#define VBVAHOSTCMD_SIZE(a_cb)                  (sizeof(VBVAHOSTCMD) + (a_cb))
+#define VBVAHOSTCMD_BODY(a_pCmd, a_TypeBody)    ((a_TypeBody RT_UNTRUSTED_VOLATILE_HSTGST *)&(a_pCmd)->body[0])
+#define VBVAHOSTCMD_HDR(a_pBody) \
+    ( (VBVAHOSTCMD RT_UNTRUSTED_VOLATILE_HSTGST *)( (uint8_t *)(a_pBody) - RT_OFFSETOF(VBVAHOSTCMD, body)) )
+#define VBVAHOSTCMD_HDRSIZE                     (RT_OFFSETOF(VBVAHOSTCMD, body))
+
+#pragma pack()
+
+/* VBVACONF32::u32Index */
+#define VBOX_VBVA_CONF32_MONITOR_COUNT  0
+#define VBOX_VBVA_CONF32_HOST_HEAP_SIZE 1
+/** Returns VINF_SUCCESS if the host can report mode hints via VBVA.
+ * Set value to VERR_NOT_SUPPORTED before calling. */
+#define VBOX_VBVA_CONF32_MODE_HINT_REPORTING  2
+/** Returns VINF_SUCCESS if the host can report guest cursor enabled status via
+ * VBVA.  Set value to VERR_NOT_SUPPORTED before calling. */
+#define VBOX_VBVA_CONF32_GUEST_CURSOR_REPORTING  3
+/** Returns the currently available host cursor capabilities.  Available if
+ * VBVACONF32::VBOX_VBVA_CONF32_GUEST_CURSOR_REPORTING returns success.
+ * @see VMMDevReqMouseStatus::mouseFeatures. */
+#define VBOX_VBVA_CONF32_CURSOR_CAPABILITIES  4
+/** Returns the supported flags in VBVAINFOSCREEN::u8Flags. */
+#define VBOX_VBVA_CONF32_SCREEN_FLAGS 5
+/** Returns the max size of VBVA record. */
+#define VBOX_VBVA_CONF32_MAX_RECORD_SIZE 6
+
+typedef struct VBVACONF32
+{
+    uint32_t u32Index;
+    uint32_t u32Value;
+} VBVACONF32;
+
+/** Reserved for historical reasons. */
+#define VBOX_VBVA_CURSOR_CAPABILITY_RESERVED0  RT_BIT(0)
+/** Guest cursor capability: can the host show a hardware cursor at the host
+ * pointer location? */
+#define VBOX_VBVA_CURSOR_CAPABILITY_HARDWARE   RT_BIT(1)
+/** Reserved for historical reasons. */
+#define VBOX_VBVA_CURSOR_CAPABILITY_RESERVED2  RT_BIT(2)
+/** Reserved for historical reasons.  Must always be unset. */
+#define VBOX_VBVA_CURSOR_CAPABILITY_RESERVED3  RT_BIT(3)
+/** Reserved for historical reasons. */
+#define VBOX_VBVA_CURSOR_CAPABILITY_RESERVED4  RT_BIT(4)
+/** Reserved for historical reasons. */
+#define VBOX_VBVA_CURSOR_CAPABILITY_RESERVED5  RT_BIT(5)
+
+typedef struct VBVAINFOVIEW
+{
+    /* Index of the screen, assigned by the guest. */
+    uint32_t u32ViewIndex;
+
+    /* The screen offset in VRAM, the framebuffer starts here. */
+    uint32_t u32ViewOffset;
+
+    /* The size of the VRAM memory that can be used for the view. */
+    uint32_t u32ViewSize;
+
+    /* The recommended maximum size of the VRAM memory for the screen. */
+    uint32_t u32MaxScreenSize;
+} VBVAINFOVIEW;
+
+typedef struct VBVAINFOHEAP
+{
+    /* Absolute offset in VRAM of the start of the heap. */
+    uint32_t u32HeapOffset;
+
+    /* The size of the heap. */
+    uint32_t u32HeapSize;
+
+} VBVAINFOHEAP;
+
+typedef struct VBVAFLUSH
+{
+    uint32_t u32Reserved;
+
+} VBVAFLUSH;
+
+typedef struct VBVACMDVBVASUBMIT
+{
+    uint32_t u32Reserved;
+} VBVACMDVBVASUBMIT;
+
+/* flush is requested because due to guest command buffer overflow */
+#define VBVACMDVBVAFLUSH_F_GUEST_BUFFER_OVERFLOW 1
+
+typedef struct VBVACMDVBVAFLUSH
+{
+    uint32_t u32Flags;
+} VBVACMDVBVAFLUSH;
+
+
+/* VBVAINFOSCREEN::u8Flags */
+#define VBVA_SCREEN_F_NONE     0x0000
+#define VBVA_SCREEN_F_ACTIVE   0x0001
+/** The virtual monitor has been disabled by the guest and should be removed
+ * by the host and ignored for purposes of pointer position calculation. */
+#define VBVA_SCREEN_F_DISABLED 0x0002
+/** The virtual monitor has been blanked by the guest and should be blacked
+ * out by the host using width, height, etc values from the VBVAINFOSCREEN request. */
+#define VBVA_SCREEN_F_BLANK    0x0004
+/** The virtual monitor has been blanked by the guest and should be blacked
+ * out by the host using the previous mode values for width. height, etc. */
+#define VBVA_SCREEN_F_BLANK2   0x0008
+
+typedef struct VBVAINFOSCREEN
+{
+    /* Which view contains the screen. */
+    uint32_t u32ViewIndex;
+
+    /* Physical X origin relative to the primary screen. */
+    int32_t i32OriginX;
+
+    /* Physical Y origin relative to the primary screen. */
+    int32_t i32OriginY;
+
+    /* Offset of visible framebuffer relative to the framebuffer start. */
+    uint32_t u32StartOffset;
+
+    /* The scan line size in bytes. */
+    uint32_t u32LineSize;
+
+    /* Width of the screen. */
+    uint32_t u32Width;
+
+    /* Height of the screen. */
+    uint32_t u32Height;
+
+    /* Color depth. */
+    uint16_t u16BitsPerPixel;
+
+    /* VBVA_SCREEN_F_* */
+    uint16_t u16Flags;
+} VBVAINFOSCREEN;
+
+
+/* VBVAENABLE::u32Flags */
+#define VBVA_F_NONE    0x00000000
+#define VBVA_F_ENABLE  0x00000001
+#define VBVA_F_DISABLE 0x00000002
+/* extended VBVA to be used with WDDM */
+#define VBVA_F_EXTENDED 0x00000004
+/* vbva offset is absolute VRAM offset */
+#define VBVA_F_ABSOFFSET 0x00000008
+
+typedef struct VBVAENABLE
+{
+    uint32_t u32Flags;
+    uint32_t u32Offset;
+    int32_t  i32Result;
+} VBVAENABLE;
+
+typedef struct VBVAENABLE_EX
+{
+    VBVAENABLE Base;
+    uint32_t u32ScreenId;
+} VBVAENABLE_EX;
+
+
+typedef struct VBVAMOUSEPOINTERSHAPE
+{
+    /* The host result. */
+    int32_t i32Result;
+
+    /* VBOX_MOUSE_POINTER_* bit flags. */
+    uint32_t fu32Flags;
+
+    /* X coordinate of the hot spot. */
+    uint32_t u32HotX;
+
+    /* Y coordinate of the hot spot. */
+    uint32_t u32HotY;
+
+    /* Width of the pointer in pixels. */
+    uint32_t u32Width;
+
+    /* Height of the pointer in scanlines. */
+    uint32_t u32Height;
+
+    /* Pointer data.
+     *
+     ****
+     * The data consists of 1 bpp AND mask followed by 32 bpp XOR (color) mask.
+     *
+     * For pointers without alpha channel the XOR mask pixels are 32 bit values: (lsb)BGR0(msb).
+     * For pointers with alpha channel the XOR mask consists of (lsb)BGRA(msb) 32 bit values.
+     *
+     * Guest driver must create the AND mask for pointers with alpha channel, so if host does not
+     * support alpha, the pointer could be displayed as a normal color pointer. The AND mask can
+     * be constructed from alpha values. For example alpha value >= 0xf0 means bit 0 in the AND mask.
+     *
+     * The AND mask is 1 bpp bitmap with byte aligned scanlines. Size of AND mask,
+     * therefore, is cbAnd = (width + 7) / 8 * height. The padding bits at the
+     * end of any scanline are undefined.
+     *
+     * The XOR mask follows the AND mask on the next 4 bytes aligned offset:
+     * uint8_t *pXor = pAnd + (cbAnd + 3) & ~3
+     * Bytes in the gap between the AND and the XOR mask are undefined.
+     * XOR mask scanlines have no gap between them and size of XOR mask is:
+     * cXor = width * 4 * height.
+     ****
+     *
+     * Preallocate 4 bytes for accessing actual data as p->au8Data.
+     */
+    uint8_t au8Data[4];
+
+} VBVAMOUSEPOINTERSHAPE;
+
+/** @name VBVAMOUSEPOINTERSHAPE::fu32Flags
+ * @note The VBOX_MOUSE_POINTER_* flags are used in the guest video driver,
+ *       values must be <= 0x8000 and must not be changed. (try make more sense
+ *       of this, please).
+ * @{
+ */
+/** pointer is visible */
+#define VBOX_MOUSE_POINTER_VISIBLE (0x0001)
+/** pointer has alpha channel */
+#define VBOX_MOUSE_POINTER_ALPHA   (0x0002)
+/** pointerData contains new pointer shape */
+#define VBOX_MOUSE_POINTER_SHAPE   (0x0004)
+/** @} */
+
+/* the guest driver can handle asynch guest cmd completion by reading the command offset from io port */
+#define VBVACAPS_COMPLETEGCMD_BY_IOREAD 0x00000001
+/* the guest driver can handle video adapter IRQs */
+#define VBVACAPS_IRQ                    0x00000002
+/** The guest can read video mode hints sent via VBVA. */
+#define VBVACAPS_VIDEO_MODE_HINTS       0x00000004
+/** The guest can switch to a software cursor on demand. */
+#define VBVACAPS_DISABLE_CURSOR_INTEGRATION 0x00000008
+/** The guest does not depend on host handling the VBE registers. */
+#define VBVACAPS_USE_VBVA_ONLY 0x00000010
+typedef struct VBVACAPS
+{
+    int32_t rc;
+    uint32_t fCaps;
+} VBVACAPS;
+
+/* makes graphics device generate IRQ on VSYNC */
+#define VBVASCANLINECFG_ENABLE_VSYNC_IRQ        0x00000001
+/* guest driver may request the current scanline */
+#define VBVASCANLINECFG_ENABLE_SCANLINE_INFO    0x00000002
+/* request the current refresh period, returned in u32RefreshPeriodMs */
+#define VBVASCANLINECFG_QUERY_REFRESH_PERIOD    0x00000004
+/* set new refresh period specified in u32RefreshPeriodMs.
+ * if used with VBVASCANLINECFG_QUERY_REFRESH_PERIOD,
+ * u32RefreshPeriodMs is set to the previous refresh period on return */
+#define VBVASCANLINECFG_SET_REFRESH_PERIOD      0x00000008
+
+typedef struct VBVASCANLINECFG
+{
+    int32_t rc;
+    uint32_t fFlags;
+    uint32_t u32RefreshPeriodMs;
+    uint32_t u32Reserved;
+} VBVASCANLINECFG;
+
+typedef struct VBVASCANLINEINFO
+{
+    int32_t rc;
+    uint32_t u32ScreenId;
+    uint32_t u32InVBlank;
+    uint32_t u32ScanLine;
+} VBVASCANLINEINFO;
+
+/** Query the most recent mode hints received from the host. */
+typedef struct VBVAQUERYMODEHINTS
+{
+    /** The maximum number of screens to return hints for. */
+    uint16_t cHintsQueried;
+    /** The size of the mode hint structures directly following this one. */
+    uint16_t cbHintStructureGuest;
+    /** The return code for the operation.  Initialise to VERR_NOT_SUPPORTED. */
+    int32_t  rc;
+} VBVAQUERYMODEHINTS;
+
+/** Structure in which a mode hint is returned.  The guest allocates an array
+ *  of these immediately after the VBVAQUERYMODEHINTS structure.  To accomodate
+ *  future extensions, the VBVAQUERYMODEHINTS structure specifies the size of
+ *  the VBVAMODEHINT structures allocated by the guest, and the host only fills
+ *  out structure elements which fit into that size.  The host should fill any
+ *  unused members (e.g. dx, dy) or structure space on the end with ~0.  The
+ *  whole structure can legally be set to ~0 to skip a screen. */
+typedef struct VBVAMODEHINT
+{
+    uint32_t magic;
+    uint32_t cx;
+    uint32_t cy;
+    uint32_t cBPP;  /* Which has never been used... */
+    uint32_t cDisplay;
+    uint32_t dx;  /**< X offset into the virtual frame-buffer. */
+    uint32_t dy;  /**< Y offset into the virtual frame-buffer. */
+    uint32_t fEnabled;  /* Not fFlags.  Add new members for new flags. */
+} VBVAMODEHINT;
+
+#define VBVAMODEHINT_MAGIC UINT32_C(0x0801add9)
+
+/** Report the rectangle relative to which absolute pointer events should be
+ *  expressed.  This information remains valid until the next VBVA resize event
+ *  for any screen, at which time it is reset to the bounding rectangle of all
+ *  virtual screens and must be re-set.
+ *  @see VBVA_REPORT_INPUT_MAPPING. */
+typedef struct VBVAREPORTINPUTMAPPING
+{
+    int32_t x;    /**< Upper left X co-ordinate relative to the first screen. */
+    int32_t y;    /**< Upper left Y co-ordinate relative to the first screen. */
+    uint32_t cx;  /**< Rectangle width. */
+    uint32_t cy;  /**< Rectangle height. */
+} VBVAREPORTINPUTMAPPING;
+
+/** Report the guest cursor position and query the host one.  The host may wish
+ *  to use the guest information to re-position its own cursor, particularly
+ *  when the cursor is captured and the guest does not support switching to a
+ *  software cursor.  After every mode switch the guest must signal that it
+ *  supports sending position information by sending an event with
+ *  @a fReportPosition set to false.
+ *  @see VBVA_CURSOR_POSITION */
+typedef struct VBVACURSORPOSITION
+{
+    uint32_t fReportPosition;  /**< Are we reporting a position? */
+    uint32_t x;                /**< Guest cursor X position */
+    uint32_t y;                /**< Guest cursor Y position */
+} VBVACURSORPOSITION;
+
+#pragma pack()
+
+typedef uint64_t VBOXVIDEOOFFSET;
+
+#define VBOXVIDEOOFFSET_VOID ((VBOXVIDEOOFFSET)~0)
+
+#pragma pack(1)
+
+/*
+ * VBOXSHGSMI made on top HGSMI and allows receiving notifications
+ * about G->H command completion
+ */
+/* SHGSMI command header */
+typedef struct VBOXSHGSMIHEADER
+{
+    uint64_t pvNext;    /*<- completion processing queue */
+    uint32_t fFlags;    /*<- see VBOXSHGSMI_FLAG_XXX Flags */
+    uint32_t cRefs;     /*<- command referece count */
+    uint64_t u64Info1;  /*<- contents depends on the fFlags value */
+    uint64_t u64Info2;  /*<- contents depends on the fFlags value */
+} VBOXSHGSMIHEADER, *PVBOXSHGSMIHEADER;
+
+typedef enum
+{
+    VBOXVDMACMD_TYPE_UNDEFINED         = 0,
+    VBOXVDMACMD_TYPE_DMA_PRESENT_BLT   = 1,
+    VBOXVDMACMD_TYPE_DMA_BPB_TRANSFER,
+    VBOXVDMACMD_TYPE_DMA_BPB_FILL,
+    VBOXVDMACMD_TYPE_DMA_PRESENT_SHADOW2PRIMARY,
+    VBOXVDMACMD_TYPE_DMA_PRESENT_CLRFILL,
+    VBOXVDMACMD_TYPE_DMA_PRESENT_FLIP,
+    VBOXVDMACMD_TYPE_DMA_NOP,
+    VBOXVDMACMD_TYPE_CHROMIUM_CMD, /* chromium cmd */
+    VBOXVDMACMD_TYPE_DMA_BPB_TRANSFER_VRAMSYS,
+    VBOXVDMACMD_TYPE_CHILD_STATUS_IRQ /* make the device notify child (monitor) state change IRQ */
+} VBOXVDMACMD_TYPE;
+
+#pragma pack()
+
+/* the command processing was asynch, set by the host to indicate asynch command completion
+ * must not be cleared once set, the command completion is performed by issuing a host->guest completion command
+ * while keeping this flag unchanged */
+#define VBOXSHGSMI_FLAG_HG_ASYNCH               0x00010000
+#if 0
+/* if set     - asynch completion is performed by issuing the event,
+ * if cleared - asynch completion is performed by calling a callback */
+#define VBOXSHGSMI_FLAG_GH_ASYNCH_EVENT         0x00000001
+#endif
+/* issue interrupt on asynch completion, used for critical G->H commands,
+ * i.e. for completion of which guest is waiting. */
+#define VBOXSHGSMI_FLAG_GH_ASYNCH_IRQ           0x00000002
+/* guest does not do any op on completion of this command,
+ * the host may copy the command and indicate that it does not need the command anymore
+ * by not setting VBOXSHGSMI_FLAG_HG_ASYNCH */
+#define VBOXSHGSMI_FLAG_GH_ASYNCH_NOCOMPLETION  0x00000004
+/* guest requires the command to be processed asynchronously,
+ * not setting VBOXSHGSMI_FLAG_HG_ASYNCH by the host in this case is treated as command failure */
+#define VBOXSHGSMI_FLAG_GH_ASYNCH_FORCE         0x00000008
+/* force IRQ on cmd completion */
+#define VBOXSHGSMI_FLAG_GH_ASYNCH_IRQ_FORCE     0x00000010
+/* an IRQ-level callback is associated with the command */
+#define VBOXSHGSMI_FLAG_GH_ASYNCH_CALLBACK_IRQ  0x00000020
+/* guest expects this command to be completed synchronously */
+#define VBOXSHGSMI_FLAG_GH_SYNCH                0x00000040
+
+
+DECLINLINE(uint8_t RT_UNTRUSTED_VOLATILE_GUEST *)
+VBoxSHGSMIBufferData(const VBOXSHGSMIHEADER RT_UNTRUSTED_VOLATILE_GUEST *pHeader)
+{
+    return (uint8_t RT_UNTRUSTED_VOLATILE_GUEST *)pHeader + sizeof(VBOXSHGSMIHEADER);
+}
+
+#define VBoxSHGSMIBufferHeaderSize() (sizeof(VBOXSHGSMIHEADER))
+
+DECLINLINE(VBOXSHGSMIHEADER RT_UNTRUSTED_VOLATILE_GUEST *) VBoxSHGSMIBufferHeader(const void RT_UNTRUSTED_VOLATILE_GUEST *pvData)
+{
+    return (VBOXSHGSMIHEADER RT_UNTRUSTED_VOLATILE_GUEST *)((uintptr_t)pvData - sizeof(VBOXSHGSMIHEADER));
+}
+
+#ifdef VBOX_WITH_VDMA
+# pragma pack(1)
+
+/* VDMA - Video DMA */
+
+/* VDMA Control API */
+/* VBOXVDMA_CTL::u32Flags */
+typedef enum
+{
+    VBOXVDMA_CTL_TYPE_NONE = 0,
+    VBOXVDMA_CTL_TYPE_ENABLE,
+    VBOXVDMA_CTL_TYPE_DISABLE,
+    VBOXVDMA_CTL_TYPE_FLUSH,
+    VBOXVDMA_CTL_TYPE_WATCHDOG,
+    VBOXVDMA_CTL_TYPE_END
+} VBOXVDMA_CTL_TYPE;
+
+typedef struct VBOXVDMA_CTL
+{
+    VBOXVDMA_CTL_TYPE enmCtl;
+    uint32_t u32Offset;
+    int32_t  i32Result;
+} VBOXVDMA_CTL;
+
+/* VBOXVDMACBUF_DR::phBuf specifies offset in VRAM */
+#define VBOXVDMACBUF_FLAG_BUF_VRAM_OFFSET 0x00000001
+/* command buffer follows the VBOXVDMACBUF_DR in VRAM, VBOXVDMACBUF_DR::phBuf is ignored */
+#define VBOXVDMACBUF_FLAG_BUF_FOLLOWS_DR  0x00000002
+
+/**
+ * We can not submit the DMA command via VRAM since we do not have control over
+ * DMA command buffer [de]allocation, i.e. we only control the buffer contents.
+ * In other words the system may call one of our callbacks to fill a command buffer
+ * with the necessary commands and then discard the buffer w/o any notification.
+ *
+ * We have only DMA command buffer physical address at submission time.
+ *
+ * so the only way is to */
+typedef struct VBOXVDMACBUF_DR
+{
+    uint16_t fFlags;
+    uint16_t cbBuf;
+    /* RT_SUCCESS()     - on success
+     * VERR_INTERRUPTED - on preemption
+     * VERR_xxx         - on error */
+    int32_t  rc;
+    union
+    {
+        uint64_t phBuf;
+        VBOXVIDEOOFFSET offVramBuf;
+    } Location;
+    uint64_t aGuestData[7];
+} VBOXVDMACBUF_DR, *PVBOXVDMACBUF_DR;
+
+#define VBOXVDMACBUF_DR_TAIL(a_pCmd, a_TailType)       \
+    ( (a_TailType      RT_UNTRUSTED_VOLATILE_HSTGST *)( ((uint8_t*)(a_pCmd)) + sizeof(VBOXVDMACBUF_DR)) )
+#define VBOXVDMACBUF_DR_FROM_TAIL(a_pCmd) \
+    ( (VBOXVDMACBUF_DR RT_UNTRUSTED_VOLATILE_HSTGST *)( ((uint8_t*)(a_pCmd)) - sizeof(VBOXVDMACBUF_DR)) )
+
+typedef struct VBOXVDMACMD
+{
+    VBOXVDMACMD_TYPE enmType;
+    uint32_t u32CmdSpecific;
+} VBOXVDMACMD;
+
+#define VBOXVDMACMD_HEADER_SIZE()                   sizeof(VBOXVDMACMD)
+#define VBOXVDMACMD_SIZE_FROMBODYSIZE(_s)           ((uint32_t)(VBOXVDMACMD_HEADER_SIZE() + (_s)))
+#define VBOXVDMACMD_SIZE(_t)                        (VBOXVDMACMD_SIZE_FROMBODYSIZE(sizeof(_t)))
+#define VBOXVDMACMD_BODY(a_pCmd, a_TypeBody)        \
+    ( (a_TypeBody RT_UNTRUSTED_VOLATILE_HSTGST  *)( ((uint8_t *)(a_pCmd)) + VBOXVDMACMD_HEADER_SIZE()) )
+#define VBOXVDMACMD_BODY_SIZE(_s)                   ( (_s) - VBOXVDMACMD_HEADER_SIZE() )
+#define VBOXVDMACMD_FROM_BODY(a_pBody)                \
+    ( (VBOXVDMACMD RT_UNTRUSTED_VOLATILE_HSTGST *)( ((uint8_t *)(a_pBody)) - VBOXVDMACMD_HEADER_SIZE()) )
+#define VBOXVDMACMD_BODY_FIELD_OFFSET(_ot, _t, _f)  ( (_ot)(uintptr_t)( VBOXVDMACMD_BODY(0, uint8_t) + RT_UOFFSETOF_DYN(_t, _f) ) )
+
+# pragma pack()
+#endif /* #ifdef VBOX_WITH_VDMA */
+
+
+#define VBOXVDMA_CHILD_STATUS_F_CONNECTED    0x01
+#define VBOXVDMA_CHILD_STATUS_F_DISCONNECTED 0x02
+#define VBOXVDMA_CHILD_STATUS_F_ROTATED      0x04
+
+typedef struct VBOXVDMA_CHILD_STATUS
+{
+    uint32_t iChild;
+    uint8_t  fFlags;
+    uint8_t  u8RotationAngle;
+    uint16_t u16Reserved;
+} VBOXVDMA_CHILD_STATUS, *PVBOXVDMA_CHILD_STATUS;
+
+/* apply the aInfos are applied to all targets, the iTarget is ignored */
+#define VBOXVDMACMD_CHILD_STATUS_IRQ_F_APPLY_TO_ALL 0x00000001
+
+typedef struct VBOXVDMACMD_CHILD_STATUS_IRQ
+{
+    uint32_t cInfos;
+    uint32_t fFlags;
+    VBOXVDMA_CHILD_STATUS aInfos[1];
+} VBOXVDMACMD_CHILD_STATUS_IRQ, *PVBOXVDMACMD_CHILD_STATUS_IRQ;
+
+#define VBOXCMDVBVA_SCREENMAP_SIZE(_elType) ((VBOX_VIDEO_MAX_SCREENS + sizeof (_elType) - 1) / sizeof (_elType))
+#define VBOXCMDVBVA_SCREENMAP_DECL(_elType, _name) _elType _name[VBOXCMDVBVA_SCREENMAP_SIZE(_elType)]
+
+#endif /* !VBOX_INCLUDED_Graphics_VBoxVideo_h */
+
diff --git a/include/VBox/Graphics/VBoxVideo3D.h b/include/VBox/Graphics/VBoxVideo3D.h
new file mode 100644
index 00000000..b1545d6f
--- /dev/null
+++ b/include/VBox/Graphics/VBoxVideo3D.h
@@ -0,0 +1,186 @@
+/* $Id: VBoxVideo3D.h $ */
+/** @file
+ * VirtualBox 3D common tooling
+ */
+
+/*
+ * Copyright (C) 2011-2022 Oracle and/or its affiliates.
+ *
+ * This file is part of VirtualBox base platform packages, as
+ * available from https://www.virtualbox.org.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, in version 3 of the
+ * License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses>.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
+ * in the VirtualBox distribution, in which case the provisions of the
+ * CDDL are applicable instead of those of the GPL.
+ *
+ * You may elect to license modified versions of this file under the
+ * terms and conditions of either the GPL or the CDDL or both.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
+ */
+
+#ifndef VBOX_INCLUDED_Graphics_VBoxVideo3D_h
+#define VBOX_INCLUDED_Graphics_VBoxVideo3D_h
+#ifndef RT_WITHOUT_PRAGMA_ONCE
+# pragma once
+#endif
+
+#include <iprt/cdefs.h>
+#include <iprt/asm.h>
+#ifndef VBoxTlsRefGetImpl
+# ifdef VBoxTlsRefSetImpl
+#  error "VBoxTlsRefSetImpl is defined, unexpected!"
+# endif
+# include <iprt/thread.h>
+# define VBoxTlsRefGetImpl(_tls) (RTTlsGet((RTTLS)(_tls)))
+# define VBoxTlsRefSetImpl(_tls, _val) (RTTlsSet((RTTLS)(_tls), (_val)))
+#else
+# ifndef VBoxTlsRefSetImpl
+#  error "VBoxTlsRefSetImpl is NOT defined, unexpected!"
+# endif
+#endif
+
+#ifndef VBoxTlsRefAssertImpl
+# define VBoxTlsRefAssertImpl(_a) do {} while (0)
+#endif
+
+typedef DECLCALLBACKTYPE(void, FNVBOXTLSREFDTOR,(void *));
+typedef FNVBOXTLSREFDTOR *PFNVBOXTLSREFDTOR;
+
+typedef enum {
+    VBOXTLSREFDATA_STATE_UNDEFINED = 0,
+    VBOXTLSREFDATA_STATE_INITIALIZED,
+    VBOXTLSREFDATA_STATE_TOBE_DESTROYED,
+    VBOXTLSREFDATA_STATE_DESTROYING,
+    VBOXTLSREFDATA_STATE_32BIT_HACK = 0x7fffffff
+} VBOXTLSREFDATA_STATE;
+
+#define VBOXTLSREFDATA \
+    volatile int32_t cTlsRefs; \
+    VBOXTLSREFDATA_STATE enmTlsRefState; \
+    PFNVBOXTLSREFDTOR pfnTlsRefDtor; \
+
+struct VBOXTLSREFDATA_DUMMY
+{
+    VBOXTLSREFDATA
+};
+
+#define VBOXTLSREFDATA_OFFSET(_t) RT_OFFSETOF(_t, cTlsRefs)
+#define VBOXTLSREFDATA_ASSERT_OFFSET(_t) RTASSERT_OFFSET_OF(_t, cTlsRefs)
+#define VBOXTLSREFDATA_SIZE() (sizeof (struct VBOXTLSREFDATA_DUMMY))
+#define VBOXTLSREFDATA_COPY(_pDst, _pSrc) do { \
+        (_pDst)->cTlsRefs = (_pSrc)->cTlsRefs; \
+        (_pDst)->enmTlsRefState = (_pSrc)->enmTlsRefState; \
+        (_pDst)->pfnTlsRefDtor = (_pSrc)->pfnTlsRefDtor; \
+    } while (0)
+
+#define VBOXTLSREFDATA_EQUAL(_pDst, _pSrc) ( \
+           (_pDst)->cTlsRefs == (_pSrc)->cTlsRefs \
+        && (_pDst)->enmTlsRefState == (_pSrc)->enmTlsRefState \
+        && (_pDst)->pfnTlsRefDtor == (_pSrc)->pfnTlsRefDtor \
+    )
+
+
+#define VBoxTlsRefInit(_p, _pfnDtor) do { \
+        (_p)->cTlsRefs = 1; \
+        (_p)->enmTlsRefState = VBOXTLSREFDATA_STATE_INITIALIZED; \
+        (_p)->pfnTlsRefDtor = (_pfnDtor); \
+    } while (0)
+
+#define VBoxTlsRefIsFunctional(_p) (!!((_p)->enmTlsRefState == VBOXTLSREFDATA_STATE_INITIALIZED))
+
+#define VBoxTlsRefAddRef(_p) do { \
+        int cRefs = ASMAtomicIncS32(&(_p)->cTlsRefs); \
+        VBoxTlsRefAssertImpl(cRefs > 1 || (_p)->enmTlsRefState == VBOXTLSREFDATA_STATE_DESTROYING); \
+        RT_NOREF(cRefs); \
+    } while (0)
+
+#define VBoxTlsRefCountGet(_p) (ASMAtomicReadS32(&(_p)->cTlsRefs))
+
+#define VBoxTlsRefRelease(_p) do { \
+        int cRefs = ASMAtomicDecS32(&(_p)->cTlsRefs); \
+        VBoxTlsRefAssertImpl(cRefs >= 0); \
+        if (!cRefs && (_p)->enmTlsRefState != VBOXTLSREFDATA_STATE_DESTROYING /* <- avoid recursion if VBoxTlsRefAddRef/Release is called from dtor */) { \
+            (_p)->enmTlsRefState = VBOXTLSREFDATA_STATE_DESTROYING; \
+            (_p)->pfnTlsRefDtor((_p)); \
+        } \
+    } while (0)
+
+#define VBoxTlsRefMarkDestroy(_p) do { \
+        (_p)->enmTlsRefState = VBOXTLSREFDATA_STATE_TOBE_DESTROYED; \
+    } while (0)
+
+#define VBoxTlsRefGetCurrent(_t, _Tsd) ((_t*) VBoxTlsRefGetImpl((_Tsd)))
+
+#define VBoxTlsRefGetCurrentFunctional(_val, _t, _Tsd) do { \
+       _t * cur = VBoxTlsRefGetCurrent(_t, _Tsd); \
+       if (!cur || VBoxTlsRefIsFunctional(cur)) { \
+           (_val) = cur; \
+       } else { \
+           VBoxTlsRefSetCurrent(_t, _Tsd, NULL); \
+           (_val) = NULL; \
+       } \
+   } while (0)
+
+#define VBoxTlsRefSetCurrent(_t, _Tsd, _p) do { \
+        _t * oldCur = VBoxTlsRefGetCurrent(_t, _Tsd); \
+        if (oldCur != (_p)) { \
+            VBoxTlsRefSetImpl((_Tsd), (_p)); \
+            if (oldCur) { \
+                VBoxTlsRefRelease(oldCur); \
+            } \
+            if ((_p)) { \
+                VBoxTlsRefAddRef((_t*)(_p)); \
+            } \
+        } \
+    } while (0)
+
+
+/* host 3D->Fe[/Qt] notification mechanism defines */
+typedef enum
+{
+    VBOX3D_NOTIFY_TYPE_TEST_FUNCTIONAL = 3,
+    VBOX3D_NOTIFY_TYPE_3DDATA_VISIBLE  = 4,
+    VBOX3D_NOTIFY_TYPE_3DDATA_HIDDEN   = 5,
+
+    VBOX3D_NOTIFY_TYPE_HW_SCREEN_FIRST        = 100,
+    VBOX3D_NOTIFY_TYPE_HW_SCREEN_IS_SUPPORTED = 100,
+    VBOX3D_NOTIFY_TYPE_HW_SCREEN_CREATED      = 101,
+    VBOX3D_NOTIFY_TYPE_HW_SCREEN_DESTROYED    = 102,
+    VBOX3D_NOTIFY_TYPE_HW_SCREEN_UPDATE_BEGIN = 103,
+    VBOX3D_NOTIFY_TYPE_HW_SCREEN_UPDATE_END   = 104,
+    VBOX3D_NOTIFY_TYPE_HW_SCREEN_BIND_SURFACE = 105,
+    VBOX3D_NOTIFY_TYPE_HW_SCREEN_LAST         = 105,
+
+    VBOX3D_NOTIFY_TYPE_HW_OVERLAY_CREATED   = 200,
+    VBOX3D_NOTIFY_TYPE_HW_OVERLAY_DESTROYED = 201,
+    VBOX3D_NOTIFY_TYPE_HW_OVERLAY_GET_ID    = 202,
+
+    VBOX3D_NOTIFY_TYPE_32BIT_HACK = 0x7fffffff
+} VBOX3D_NOTIFY_TYPE;
+
+typedef struct VBOX3DNOTIFY
+{
+    VBOX3D_NOTIFY_TYPE enmNotification;
+    int32_t  iDisplay;
+    uint32_t u32Reserved;
+    uint32_t cbData;
+    uint8_t  au8Data[sizeof(uint64_t)];
+} VBOX3DNOTIFY;
+
+#endif /* !VBOX_INCLUDED_Graphics_VBoxVideo3D_h */
diff --git a/include/VBox/Graphics/VBoxVideoErr.h b/include/VBox/Graphics/VBoxVideoErr.h
new file mode 100644
index 00000000..a934d16a
--- /dev/null
+++ b/include/VBox/Graphics/VBoxVideoErr.h
@@ -0,0 +1,76 @@
+/* $Id: VBoxVideoErr.h $ */
+/** @file
+ * VirtualBox Video driver, common code - iprt and VirtualBox macros and
+ * definitions.
+ */
+
+/*
+ * Copyright (C) 2017-2022 Oracle and/or its affiliates.
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following
+ * conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef VBOX_INCLUDED_Graphics_VBoxVideoErr_h
+#define VBOX_INCLUDED_Graphics_VBoxVideoErr_h
+#ifndef RT_WITHOUT_PRAGMA_ONCE
+# pragma once
+#endif
+
+/** @name VirtualBox error macros
+ * @{ */
+
+#define VINF_SUCCESS                        0
+#define VERR_INVALID_PARAMETER              (-2)
+#define VERR_INVALID_POINTER                (-6)
+#define VERR_NO_MEMORY                      (-8)
+#define VERR_NOT_IMPLEMENTED                (-12)
+#define VERR_INVALID_FUNCTION               (-36)
+#define VERR_NOT_SUPPORTED                  (-37)
+#define VERR_TOO_MUCH_DATA                  (-42)
+#define VERR_NOT_FOUND                      (-78)
+#define VERR_INVALID_STATE                  (-79)
+#define VERR_OUT_OF_RESOURCES               (-80)
+#define VERR_ALREADY_EXISTS                 (-105)
+#define VERR_INTERNAL_ERROR                 (-225)
+
+#define RT_SUCCESS_NP(rc)   ( (int)(rc) >= VINF_SUCCESS )
+#define RT_SUCCESS(rc)      ( likely(RT_SUCCESS_NP(rc)) )
+#define RT_FAILURE(rc)      ( unlikely(!RT_SUCCESS_NP(rc)) )
+
+/** @}  */
+
+/** @name VirtualBox assertions
+ * @{ */
+
+/* Unlike BUILD_BUG_ON(), these can be used outside of functions. */
+extern int vbox_assert_var[1];
+#define assert_compile(expr) \
+    extern int vbox_assert_var[1] __attribute__((__unused__)), \
+    vbox_assert_var[(expr) ? 1 : 0] __attribute__((__unused__))
+#define assert_compile_size(type, size) \
+    assert_compile(sizeof(type) == (size))
+#define assert_ptr_return(ptr,ret) \
+    do { if (unlikely(!(ptr))) { WARN_ON_ONCE(!(ptr)); return ret; } } while (0)
+
+/** @}  */
+
+#endif /* !VBOX_INCLUDED_Graphics_VBoxVideoErr_h */
diff --git a/include/VBox/Graphics/VBoxVideoGuest.h b/include/VBox/Graphics/VBoxVideoGuest.h
new file mode 100644
index 00000000..82018737
--- /dev/null
+++ b/include/VBox/Graphics/VBoxVideoGuest.h
@@ -0,0 +1,185 @@
+/* $Id: VBoxVideoGuest.h $ */
+/** @file
+ * VBox Host Guest Shared Memory Interface (HGSMI) - OS-independent guest structures.
+ */
+
+/*
+ * Copyright (C) 2006-2022 Oracle and/or its affiliates.
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following
+ * conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef VBOX_INCLUDED_Graphics_VBoxVideoGuest_h
+#define VBOX_INCLUDED_Graphics_VBoxVideoGuest_h
+#ifndef RT_WITHOUT_PRAGMA_ONCE
+# pragma once
+#endif
+
+#include "VBoxVideoIPRT.h"
+#include "HGSMIBase.h"
+#include "VBoxVideo.h"
+
+RT_C_DECLS_BEGIN
+
+/**
+ * Structure grouping the context needed for sending graphics acceleration
+ * information to the host via VBVA.  Each screen has its own VBVA buffer.
+ */
+typedef struct VBVABUFFERCONTEXT
+{
+    /** Offset of the buffer in the VRAM section for the screen */
+    uint32_t    offVRAMBuffer;
+    /** Length of the buffer in bytes */
+    uint32_t    cbBuffer;
+    /** This flag is set if we wrote to the buffer faster than the host could
+     * read it. */
+    bool        fHwBufferOverflow;
+    /** The VBVA record that we are currently preparing for the host, NULL if
+     * none. */
+    struct VBVARECORD *pRecord;
+    /** Pointer to the VBVA buffer mapped into the current address space.  Will
+     * be NULL if VBVA is not enabled. */
+    struct VBVABUFFER *pVBVA;
+} VBVABUFFERCONTEXT, *PVBVABUFFERCONTEXT;
+
+/** @name Base HGSMI APIs
+ * @{ */
+
+DECLHIDDEN(bool)     VBoxHGSMIIsSupported(void);
+DECLHIDDEN(void)     VBoxHGSMIGetBaseMappingInfo(uint32_t cbVRAM,
+                                                 uint32_t *poffVRAMBaseMapping,
+                                                 uint32_t *pcbMapping,
+                                                 uint32_t *poffGuestHeapMemory,
+                                                 uint32_t *pcbGuestHeapMemory,
+                                                 uint32_t *poffHostFlags);
+DECLHIDDEN(int)      VBoxHGSMIReportFlagsLocation(PHGSMIGUESTCOMMANDCONTEXT pCtx,
+                                                  HGSMIOFFSET offLocation);
+DECLHIDDEN(int)      VBoxHGSMISendCapsInfo(PHGSMIGUESTCOMMANDCONTEXT pCtx,
+                                           uint32_t fCaps);
+DECLHIDDEN(void)     VBoxHGSMIGetHostAreaMapping(PHGSMIGUESTCOMMANDCONTEXT pCtx,
+                                                 uint32_t cbVRAM,
+                                                 uint32_t offVRAMBaseMapping,
+                                                 uint32_t *poffVRAMHostArea,
+                                                 uint32_t *pcbHostArea);
+DECLHIDDEN(int)      VBoxHGSMISendHostCtxInfo(PHGSMIGUESTCOMMANDCONTEXT pCtx,
+                                              HGSMIOFFSET offVRAMFlagsLocation,
+                                              uint32_t fCaps,
+                                              uint32_t offVRAMHostArea,
+                                              uint32_t cbHostArea);
+DECLHIDDEN(int)      VBoxQueryConfHGSMI(PHGSMIGUESTCOMMANDCONTEXT pCtx,
+                                        uint32_t u32Index, uint32_t *pulValue);
+DECLHIDDEN(int)      VBoxQueryConfHGSMIDef(PHGSMIGUESTCOMMANDCONTEXT pCtx,
+                                           uint32_t u32Index, uint32_t u32DefValue, uint32_t *pulValue);
+DECLHIDDEN(int)      VBoxHGSMIUpdatePointerShape(PHGSMIGUESTCOMMANDCONTEXT pCtx,
+                                                 uint32_t fFlags,
+                                                 uint32_t cHotX,
+                                                 uint32_t cHotY,
+                                                 uint32_t cWidth,
+                                                 uint32_t cHeight,
+                                                 uint8_t *pPixels,
+                                                 uint32_t cbLength);
+DECLHIDDEN(int)      VBoxHGSMICursorPosition(PHGSMIGUESTCOMMANDCONTEXT pCtx, bool fReportPosition, uint32_t x, uint32_t y,
+                                             uint32_t *pxHost, uint32_t *pyHost);
+
+/** @}  */
+
+/** @name VBVA APIs
+ * @{ */
+DECLHIDDEN(bool) VBoxVBVAEnable(PVBVABUFFERCONTEXT pCtx,
+                                PHGSMIGUESTCOMMANDCONTEXT pHGSMICtx,
+                                struct VBVABUFFER *pVBVA, int32_t cScreen);
+DECLHIDDEN(void) VBoxVBVADisable(PVBVABUFFERCONTEXT pCtx,
+                                 PHGSMIGUESTCOMMANDCONTEXT pHGSMICtx,
+                                 int32_t cScreen);
+DECLHIDDEN(bool) VBoxVBVABufferBeginUpdate(PVBVABUFFERCONTEXT pCtx,
+                                           PHGSMIGUESTCOMMANDCONTEXT pHGSMICtx);
+DECLHIDDEN(void) VBoxVBVABufferEndUpdate(PVBVABUFFERCONTEXT pCtx);
+DECLHIDDEN(bool) VBoxVBVAWrite(PVBVABUFFERCONTEXT pCtx,
+                               PHGSMIGUESTCOMMANDCONTEXT pHGSMICtx,
+                               const void *pv, uint32_t cb);
+DECLHIDDEN(bool) VBoxVBVAOrderSupported(PVBVABUFFERCONTEXT pCtx, unsigned code);
+DECLHIDDEN(void) VBoxVBVASetupBufferContext(PVBVABUFFERCONTEXT pCtx,
+                                            uint32_t offVRAMBuffer,
+                                            uint32_t cbBuffer);
+
+/** @}  */
+
+/** @name Modesetting APIs
+ * @{ */
+
+DECLHIDDEN(uint32_t) VBoxHGSMIGetMonitorCount(PHGSMIGUESTCOMMANDCONTEXT pCtx);
+DECLHIDDEN(bool)     VBoxVGACfgAvailable(void);
+DECLHIDDEN(bool)     VBoxVGACfgQuery(uint16_t u16Id, uint32_t *pu32Value, uint32_t u32DefValue);
+DECLHIDDEN(uint32_t) VBoxVideoGetVRAMSize(void);
+DECLHIDDEN(bool)     VBoxVideoAnyWidthAllowed(void);
+DECLHIDDEN(uint16_t) VBoxHGSMIGetScreenFlags(PHGSMIGUESTCOMMANDCONTEXT pCtx);
+
+struct VBVAINFOVIEW;
+/**
+ * Callback funtion called from @a VBoxHGSMISendViewInfo to initialise
+ * the @a VBVAINFOVIEW structure for each screen.
+ *
+ * @returns  iprt status code
+ * @param  pvData  context data for the callback, passed to @a
+ *                 VBoxHGSMISendViewInfo along with the callback
+ * @param  pInfo   array of @a VBVAINFOVIEW structures to be filled in
+ * @todo  explicitly pass the array size
+ */
+typedef DECLCALLBACKTYPE(int, FNHGSMIFILLVIEWINFO,(void *pvData, struct VBVAINFOVIEW *pInfo, uint32_t cViews));
+/** Pointer to a FNHGSMIFILLVIEWINFO callback */
+typedef FNHGSMIFILLVIEWINFO *PFNHGSMIFILLVIEWINFO;
+
+DECLHIDDEN(int)      VBoxHGSMISendViewInfo(PHGSMIGUESTCOMMANDCONTEXT pCtx,
+                                           uint32_t u32Count,
+                                           PFNHGSMIFILLVIEWINFO pfnFill,
+                                           void *pvData);
+DECLHIDDEN(void)     VBoxVideoSetModeRegisters(uint16_t cWidth, uint16_t cHeight,
+                                               uint16_t cVirtWidth, uint16_t cBPP,
+                                               uint16_t fFlags,
+                                               uint16_t cx, uint16_t cy);
+DECLHIDDEN(bool)     VBoxVideoGetModeRegisters(uint16_t *pcWidth,
+                                               uint16_t *pcHeight,
+                                               uint16_t *pcVirtWidth,
+                                               uint16_t *pcBPP,
+                                               uint16_t *pfFlags);
+DECLHIDDEN(void)     VBoxVideoDisableVBE(void);
+DECLHIDDEN(void)     VBoxHGSMIProcessDisplayInfo(PHGSMIGUESTCOMMANDCONTEXT pCtx,
+                                                 uint32_t cDisplay,
+                                                 int32_t  cOriginX,
+                                                 int32_t  cOriginY,
+                                                 uint32_t offStart,
+                                                 uint32_t cbPitch,
+                                                 uint32_t cWidth,
+                                                 uint32_t cHeight,
+                                                 uint16_t cBPP,
+                                                 uint16_t fFlags);
+DECLHIDDEN(int)      VBoxHGSMIUpdateInputMapping(PHGSMIGUESTCOMMANDCONTEXT pCtx, int32_t  cOriginX, int32_t  cOriginY,
+                                                 uint32_t cWidth, uint32_t cHeight);
+DECLHIDDEN(int) VBoxHGSMIGetModeHints(PHGSMIGUESTCOMMANDCONTEXT pCtx,
+                                      unsigned cScreens, VBVAMODEHINT *paHints);
+
+/** @}  */
+
+RT_C_DECLS_END
+
+#endif /* !VBOX_INCLUDED_Graphics_VBoxVideoGuest_h */
+
diff --git a/include/VBox/Graphics/VBoxVideoIPRT.h b/include/VBox/Graphics/VBoxVideoIPRT.h
new file mode 100644
index 00000000..b1533e72
--- /dev/null
+++ b/include/VBox/Graphics/VBoxVideoIPRT.h
@@ -0,0 +1,114 @@
+/* $Id: VBoxVideoIPRT.h $ */
+/** @file
+ * VirtualBox Video driver, common code - iprt and VirtualBox macros and definitions.
+ */
+
+/*
+ * Copyright (C) 2017-2022 Oracle and/or its affiliates.
+ *
+ * This file is part of VirtualBox base platform packages, as
+ * available from https://www.virtualbox.org.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, in version 3 of the
+ * License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses>.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
+ * in the VirtualBox distribution, in which case the provisions of the
+ * CDDL are applicable instead of those of the GPL.
+ *
+ * You may elect to license modified versions of this file under the
+ * terms and conditions of either the GPL or the CDDL or both.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
+ */
+
+#ifndef VBOX_INCLUDED_Graphics_VBoxVideoIPRT_h
+#define VBOX_INCLUDED_Graphics_VBoxVideoIPRT_h
+#ifndef RT_WITHOUT_PRAGMA_ONCE
+# pragma once
+#endif
+
+#if !defined(RT_OS_OS2) || !defined(__IBMC__) /* IBM VACpp 3.08 doesn't properly eliminate unused inline functions */
+# include <iprt/asm.h>
+# include <iprt/string.h>
+#endif
+#include <iprt/assert.h>
+#include <iprt/cdefs.h>
+#include <iprt/err.h>
+#include <iprt/list.h>
+#include <iprt/stdarg.h>
+#include <iprt/stdint.h>
+#include <iprt/types.h>
+
+#if !defined(VBOX_XPDM_MINIPORT) && !defined(RT_OS_OS2) && (defined(RT_ARCH_AMD64) || defined(RT_ARCH_X86))
+# include <iprt/asm-amd64-x86.h>
+#endif
+
+#ifdef VBOX_XPDM_MINIPORT
+# include <iprt/nt/miniport.h>
+# include <ntddvdeo.h> /* sdk, clean */
+# include <iprt/nt/Video.h>
+#endif
+
+/** @name Port I/O helpers
+ * @{ */
+
+#ifdef VBOX_XPDM_MINIPORT
+
+/** Write an 8-bit value to an I/O port. */
+# define VBVO_PORT_WRITE_U8(Port, Value) \
+    VideoPortWritePortUchar((PUCHAR)Port, Value)
+/** Write a 16-bit value to an I/O port. */
+# define VBVO_PORT_WRITE_U16(Port, Value) \
+    VideoPortWritePortUshort((PUSHORT)Port, Value)
+/** Write a 32-bit value to an I/O port. */
+# define VBVO_PORT_WRITE_U32(Port, Value) \
+    VideoPortWritePortUlong((PULONG)Port, Value)
+/** Read an 8-bit value from an I/O port. */
+# define VBVO_PORT_READ_U8(Port) \
+    VideoPortReadPortUchar((PUCHAR)Port)
+/** Read a 16-bit value from an I/O port. */
+# define VBVO_PORT_READ_U16(Port) \
+    VideoPortReadPortUshort((PUSHORT)Port)
+/** Read a 32-bit value from an I/O port. */
+# define VBVO_PORT_READ_U32(Port) \
+    VideoPortReadPortUlong((PULONG)Port)
+
+#else  /** @todo make these explicit */
+
+/** Write an 8-bit value to an I/O port. */
+# define VBVO_PORT_WRITE_U8(Port, Value) \
+    ASMOutU8(Port, Value)
+/** Write a 16-bit value to an I/O port. */
+# define VBVO_PORT_WRITE_U16(Port, Value) \
+    ASMOutU16(Port, Value)
+/** Write a 32-bit value to an I/O port. */
+# define VBVO_PORT_WRITE_U32(Port, Value) \
+    ASMOutU32(Port, Value)
+/** Read an 8-bit value from an I/O port. */
+# define VBVO_PORT_READ_U8(Port) \
+    ASMInU8(Port)
+/** Read a 16-bit value from an I/O port. */
+# define VBVO_PORT_READ_U16(Port) \
+    ASMInU16(Port)
+/** Read a 32-bit value from an I/O port. */
+# define VBVO_PORT_READ_U32(Port) \
+    ASMInU32(Port)
+#endif
+
+/** @}  */
+
+#endif /* !VBOX_INCLUDED_Graphics_VBoxVideoIPRT_h */
+
diff --git a/include/VBox/Graphics/VBoxVideoVBE.h b/include/VBox/Graphics/VBoxVideoVBE.h
new file mode 100644
index 00000000..fb1c6808
--- /dev/null
+++ b/include/VBox/Graphics/VBoxVideoVBE.h
@@ -0,0 +1,107 @@
+/* $Id: VBoxVideoVBE.h $ */
+/** @file
+ * VirtualBox graphics card port I/O definitions
+ */
+
+/*
+ * Copyright (C) 2006-2022 Oracle and/or its affiliates.
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following
+ * conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef VBOX_INCLUDED_Graphics_VBoxVideoVBE_h
+#define VBOX_INCLUDED_Graphics_VBoxVideoVBE_h
+#ifndef RT_WITHOUT_PRAGMA_ONCE
+# pragma once
+#endif
+
+/* GUEST <-> HOST Communication API */
+
+/** @todo FIXME: Either dynamicly ask host for this or put somewhere high in
+ *               physical memory like 0xE0000000. */
+
+#define VBE_DISPI_BANK_ADDRESS          0xA0000
+#define VBE_DISPI_BANK_SIZE_KB          64
+
+#define VBE_DISPI_MAX_XRES              16384
+#define VBE_DISPI_MAX_YRES              16384
+#define VBE_DISPI_MAX_BPP               32
+
+#define VBE_DISPI_IOPORT_INDEX          0x01CE
+#define VBE_DISPI_IOPORT_DATA           0x01CF
+
+#define VBE_DISPI_IOPORT_DAC_WRITE_INDEX  0x03C8
+#define VBE_DISPI_IOPORT_DAC_DATA         0x03C9
+
+/* Cross reference with src/VBox/Devices/Graphics/DevVGA.h */
+#define VBE_DISPI_INDEX_ID              0x0
+#define VBE_DISPI_INDEX_XRES            0x1
+#define VBE_DISPI_INDEX_YRES            0x2
+#define VBE_DISPI_INDEX_BPP             0x3
+#define VBE_DISPI_INDEX_ENABLE          0x4
+#define VBE_DISPI_INDEX_BANK            0x5
+#define VBE_DISPI_INDEX_VIRT_WIDTH      0x6
+#define VBE_DISPI_INDEX_VIRT_HEIGHT     0x7
+#define VBE_DISPI_INDEX_X_OFFSET        0x8
+#define VBE_DISPI_INDEX_Y_OFFSET        0x9
+#define VBE_DISPI_INDEX_VBOX_VIDEO      0xa
+#define VBE_DISPI_INDEX_FB_BASE_HI      0xb
+#define VBE_DISPI_INDEX_CFG             0xc
+
+#define VBE_DISPI_ID0                   0xB0C0
+#define VBE_DISPI_ID1                   0xB0C1
+#define VBE_DISPI_ID2                   0xB0C2
+#define VBE_DISPI_ID3                   0xB0C3
+#define VBE_DISPI_ID4                   0xB0C4
+
+#define VBE_DISPI_ID_VBOX_VIDEO         0xBE00
+/* The VBOX interface id. Indicates support for VBVA shared memory interface. */
+#define VBE_DISPI_ID_HGSMI              0xBE01
+#define VBE_DISPI_ID_ANYX               0xBE02
+#define VBE_DISPI_ID_CFG                0xBE03 /* VBE_DISPI_INDEX_CFG is available. */
+
+#define VBE_DISPI_DISABLED              0x00
+#define VBE_DISPI_ENABLED               0x01
+#define VBE_DISPI_GETCAPS               0x02
+#define VBE_DISPI_8BIT_DAC              0x20
+/** @note this definition is a BOCHS legacy, used only in the video BIOS
+ *        code and ignored by the emulated hardware. */
+#define VBE_DISPI_LFB_ENABLED           0x40
+#define VBE_DISPI_NOCLEARMEM            0x80
+
+/* VBE_DISPI_INDEX_CFG content. */
+#define VBE_DISPI_CFG_MASK_ID           0x0FFF /* Identifier of a configuration value. */
+#define VBE_DISPI_CFG_MASK_SUPPORT      0x1000 /* Query whether the identifier is supported. */
+#define VBE_DISPI_CFG_MASK_RESERVED     0xE000 /* For future extensions. Must be 0. */
+
+/* VBE_DISPI_INDEX_CFG values. */
+#define VBE_DISPI_CFG_ID_VERSION        0x0000 /* Version of the configuration interface. */
+#define VBE_DISPI_CFG_ID_VRAM_SIZE      0x0001 /* VRAM size. */
+#define VBE_DISPI_CFG_ID_3D             0x0002 /* 3D support. */
+#define VBE_DISPI_CFG_ID_VMSVGA         0x0003 /* VMSVGA FIFO and ports are available. */
+#define VBE_DISPI_CFG_ID_VMSVGA_DX      0x0004 /* VGPU10 is enabled. */
+
+#define VGA_PORT_HGSMI_HOST             0x3b0
+#define VGA_PORT_HGSMI_GUEST            0x3d0
+
+#endif /* !VBOX_INCLUDED_Graphics_VBoxVideoVBE_h */
+
diff --git a/include/VBox/Graphics/VBoxVideoVBEPrivate.h b/include/VBox/Graphics/VBoxVideoVBEPrivate.h
new file mode 100644
index 00000000..40f8bfa4
--- /dev/null
+++ b/include/VBox/Graphics/VBoxVideoVBEPrivate.h
@@ -0,0 +1,245 @@
+/** @file
+ * VirtualBox graphics card definitions, private interface for firmware
+ */
+
+/*
+ * Copyright (C) 2006-2022 Oracle and/or its affiliates.
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following
+ * conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef VBOX_INCLUDED_Graphics_VBoxVideoVBEPrivate_h
+#define VBOX_INCLUDED_Graphics_VBoxVideoVBEPrivate_h
+#ifndef RT_WITHOUT_PRAGMA_ONCE
+# pragma once
+#endif
+
+#ifdef VBE
+# include <stdint.h>
+#else
+# include <iprt/types.h>
+#endif
+
+/* VBE Mode Numbers */
+#define VBE_MODE_VESA_DEFINED                            0x0100
+#define VBE_MODE_REFRESH_RATE_USE_CRTC                   0x0800
+#define VBE_MODE_LINEAR_FRAME_BUFFER                     0x4000
+#define VBE_MODE_PRESERVE_DISPLAY_MEMORY                 0x8000
+
+/* VBE GFX Mode Number */
+#define VBE_VESA_MODE_640X400X8                          0x100
+#define VBE_VESA_MODE_640X480X8                          0x101
+#define VBE_VESA_MODE_800X600X4                          0x102
+#define VBE_VESA_MODE_800X600X8                          0x103
+#define VBE_VESA_MODE_1024X768X4                         0x104
+#define VBE_VESA_MODE_1024X768X8                         0x105
+#define VBE_VESA_MODE_1280X1024X4                        0x106
+#define VBE_VESA_MODE_1280X1024X8                        0x107
+#define VBE_VESA_MODE_320X200X1555                       0x10D
+#define VBE_VESA_MODE_320X200X565                        0x10E
+#define VBE_VESA_MODE_320X200X888                        0x10F
+#define VBE_VESA_MODE_640X480X1555                       0x110
+#define VBE_VESA_MODE_640X480X565                        0x111
+#define VBE_VESA_MODE_640X480X888                        0x112
+#define VBE_VESA_MODE_800X600X1555                       0x113
+#define VBE_VESA_MODE_800X600X565                        0x114
+#define VBE_VESA_MODE_800X600X888                        0x115
+#define VBE_VESA_MODE_1024X768X1555                      0x116
+#define VBE_VESA_MODE_1024X768X565                       0x117
+#define VBE_VESA_MODE_1024X768X888                       0x118
+#define VBE_VESA_MODE_1280X1024X1555                     0x119
+#define VBE_VESA_MODE_1280X1024X565                      0x11A
+#define VBE_VESA_MODE_1280X1024X888                      0x11B
+#define VBE_VESA_MODE_1600X1200X8                        0x11C
+#define VBE_VESA_MODE_1600X1200X1555                     0x11D
+#define VBE_VESA_MODE_1600X1200X565                      0x11E
+#define VBE_VESA_MODE_1600X1200X888                      0x11F
+
+/* BOCHS/PLEX86 'own' mode numbers */
+#define VBE_OWN_MODE_320X200X8888                        0x140
+#define VBE_OWN_MODE_640X400X8888                        0x141
+#define VBE_OWN_MODE_640X480X8888                        0x142
+#define VBE_OWN_MODE_800X600X8888                        0x143
+#define VBE_OWN_MODE_1024X768X8888                       0x144
+#define VBE_OWN_MODE_1280X1024X8888                      0x145
+#define VBE_OWN_MODE_320X200X8                           0x146
+#define VBE_OWN_MODE_1600X1200X8888                      0x147
+#define VBE_OWN_MODE_1152X864X8                          0x148
+#define VBE_OWN_MODE_1152X864X1555                       0x149
+#define VBE_OWN_MODE_1152X864X565                        0x14a
+#define VBE_OWN_MODE_1152X864X888                        0x14b
+#define VBE_OWN_MODE_1152X864X8888                       0x14c
+
+/* VirtualBox 'own' mode numbers */
+#define VBE_VBOX_MODE_CUSTOM1                            0x160
+#define VBE_VBOX_MODE_CUSTOM2                            0x161
+#define VBE_VBOX_MODE_CUSTOM3                            0x162
+#define VBE_VBOX_MODE_CUSTOM4                            0x163
+#define VBE_VBOX_MODE_CUSTOM5                            0x164
+#define VBE_VBOX_MODE_CUSTOM6                            0x165
+#define VBE_VBOX_MODE_CUSTOM7                            0x166
+#define VBE_VBOX_MODE_CUSTOM8                            0x167
+#define VBE_VBOX_MODE_CUSTOM9                            0x168
+#define VBE_VBOX_MODE_CUSTOM10                           0x169
+#define VBE_VBOX_MODE_CUSTOM11                           0x16a
+#define VBE_VBOX_MODE_CUSTOM12                           0x16b
+#define VBE_VBOX_MODE_CUSTOM13                           0x16c
+#define VBE_VBOX_MODE_CUSTOM14                           0x16d
+#define VBE_VBOX_MODE_CUSTOM15                           0x16e
+#define VBE_VBOX_MODE_CUSTOM16                           0x16f
+
+#define VBE_VESA_MODE_END_OF_LIST                        0xFFFF
+
+/* Capabilities */
+#define VBE_CAPABILITY_8BIT_DAC                          0x0001
+#define VBE_CAPABILITY_NOT_VGA_COMPATIBLE                0x0002
+#define VBE_CAPABILITY_RAMDAC_USE_BLANK_BIT              0x0004
+#define VBE_CAPABILITY_STEREOSCOPIC_SUPPORT              0x0008
+#define VBE_CAPABILITY_STEREO_VIA_VESA_EVC               0x0010
+
+/* Mode Attributes */
+#define VBE_MODE_ATTRIBUTE_SUPPORTED                     0x0001
+#define VBE_MODE_ATTRIBUTE_EXTENDED_INFORMATION_AVAILABLE  0x0002
+#define VBE_MODE_ATTRIBUTE_TTY_BIOS_SUPPORT              0x0004
+#define VBE_MODE_ATTRIBUTE_COLOR_MODE                    0x0008
+#define VBE_MODE_ATTRIBUTE_GRAPHICS_MODE                 0x0010
+#define VBE_MODE_ATTRIBUTE_NOT_VGA_COMPATIBLE            0x0020
+#define VBE_MODE_ATTRIBUTE_NO_VGA_COMPATIBLE_WINDOW      0x0040
+#define VBE_MODE_ATTRIBUTE_LINEAR_FRAME_BUFFER_MODE      0x0080
+#define VBE_MODE_ATTRIBUTE_DOUBLE_SCAN_MODE              0x0100
+#define VBE_MODE_ATTRIBUTE_INTERLACE_MODE                0x0200
+#define VBE_MODE_ATTRIBUTE_HARDWARE_TRIPLE_BUFFER        0x0400
+#define VBE_MODE_ATTRIBUTE_HARDWARE_STEREOSCOPIC_DISPLAY 0x0800
+#define VBE_MODE_ATTRIBUTE_DUAL_DISPLAY_START_ADDRESS    0x1000
+
+#define VBE_MODE_ATTTRIBUTE_LFB_ONLY                     ( VBE_MODE_ATTRIBUTE_NO_VGA_COMPATIBLE_WINDOW | VBE_MODE_ATTRIBUTE_LINEAR_FRAME_BUFFER_MODE )
+
+/* Window attributes */
+#define VBE_WINDOW_ATTRIBUTE_RELOCATABLE                 0x01
+#define VBE_WINDOW_ATTRIBUTE_READABLE                    0x02
+#define VBE_WINDOW_ATTRIBUTE_WRITEABLE                   0x04
+
+/* Memory model */
+#define VBE_MEMORYMODEL_TEXT_MODE                        0x00
+#define VBE_MEMORYMODEL_CGA_GRAPHICS                     0x01
+#define VBE_MEMORYMODEL_HERCULES_GRAPHICS                0x02
+#define VBE_MEMORYMODEL_PLANAR                           0x03
+#define VBE_MEMORYMODEL_PACKED_PIXEL                     0x04
+#define VBE_MEMORYMODEL_NON_CHAIN_4_256                  0x05
+#define VBE_MEMORYMODEL_DIRECT_COLOR                     0x06
+#define VBE_MEMORYMODEL_YUV                              0x07
+
+/* DirectColorModeInfo */
+#define VBE_DIRECTCOLOR_COLOR_RAMP_PROGRAMMABLE          0x01
+#define VBE_DIRECTCOLOR_RESERVED_BITS_AVAILABLE          0x02
+
+/* Video memory */
+#define VGAMEM_GRAPH                                     0xA000
+
+/**
+ * VBE Bios Extra Data structure.
+ */
+typedef struct VBEHeader
+{
+    /** Signature (VBEHEADER_MAGIC). */
+    uint16_t      u16Signature;
+    /** Data size. */
+    uint16_t      cbData;
+} VBEHeader;
+
+/** The value of the VBEHeader::u16Signature field. */
+#define VBEHEADER_MAGIC      0x77CC
+
+/** The extra port which is used to read the mode list. */
+#define VBE_EXTRA_PORT       0x3b6
+
+/** The extra port which is used for debug printf. */
+#define VBE_PRINTF_PORT      0x3b7
+
+/**
+ * This one is for compactly storing a list of mode info blocks
+ */
+#pragma pack(1) /* pack(1) is important! (you'll get a byte extra for each of the u8 fields elsewise...)
+                 * bird: Load of non-sense. You'll get two extra bytes before MaxPixelClock if you don't pack it.  */
+typedef struct ModeInfoBlockCompact
+{
+    /* Mandatory information for all VBE revisions */
+    uint16_t     ModeAttributes;
+    uint8_t      WinAAttributes;
+    uint8_t      WinBAttributes;
+    uint16_t     WinGranularity;
+    uint16_t     WinSize;
+    uint16_t     WinASegment;
+    uint16_t     WinBSegment;
+    uint32_t     WinFuncPtr;
+    uint16_t     BytesPerScanLine;
+    /* Mandatory information for VBE 1.2 and above */
+    uint16_t     XResolution;
+    uint16_t     YResolution;
+    uint8_t      XCharSize;
+    uint8_t      YCharSize;
+    uint8_t      NumberOfPlanes;
+    uint8_t      BitsPerPixel;
+    uint8_t      NumberOfBanks;
+    uint8_t      MemoryModel;
+    uint8_t      BankSize;
+    uint8_t      NumberOfImagePages;
+    uint8_t      Reserved_page;
+    /* Direct Color fields (required for direct/6 and YUV/7 memory models) */
+    uint8_t      RedMaskSize;
+    uint8_t      RedFieldPosition;
+    uint8_t      GreenMaskSize;
+    uint8_t      GreenFieldPosition;
+    uint8_t      BlueMaskSize;
+    uint8_t      BlueFieldPosition;
+    uint8_t      RsvdMaskSize;
+    uint8_t      RsvdFieldPosition;
+    uint8_t      DirectColorModeInfo;
+    /* Mandatory information for VBE 2.0 and above */
+    uint32_t     PhysBasePtr;
+    uint32_t     OffScreenMemOffset;
+    uint16_t     OffScreenMemSize;
+    /* Mandatory information for VBE 3.0 and above */
+    uint16_t     LinBytesPerScanLine;
+    uint8_t      BnkNumberOfPages;
+    uint8_t      LinNumberOfPages;
+    uint8_t      LinRedMaskSize;
+    uint8_t      LinRedFieldPosition;
+    uint8_t      LinGreenMaskSize;
+    uint8_t      LinGreenFieldPosition;
+    uint8_t      LinBlueMaskSize;
+    uint8_t      LinBlueFieldPosition;
+    uint8_t      LinRsvdMaskSize;
+    uint8_t      LinRsvdFieldPosition;
+    uint32_t     MaxPixelClock;
+} ModeInfoBlockCompact;
+#pragma pack()
+
+typedef struct ModeInfoListItem
+{
+    uint16_t                mode;
+    ModeInfoBlockCompact    info;
+} ModeInfoListItem;
+
+
+#endif /* !VBOX_INCLUDED_Graphics_VBoxVideoVBEPrivate_h */
+