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

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

1 files changed, 1482 insertions, 0 deletions

diff --git a/include/VBox/vmm/vm.h b/include/VBox/vmm/vm.h
new file mode 100644
index 00000000..714b72fb
--- /dev/null
+++ b/include/VBox/vmm/vm.h
@@ -0,0 +1,1482 @@
+/** @file
+ * VM - The Virtual Machine, data.
+ */
+
+/*
+ * Copyright (C) 2006-2020 Oracle Corporation
+ *
+ * This file is part of VirtualBox Open Source Edition (OSE), as
+ * available from http://www.virtualbox.org. This file is free software;
+ * you can redistribute it and/or modify it under the terms of the GNU
+ * General Public License (GPL) as published by the Free Software
+ * Foundation, in version 2 as it comes in the "COPYING" file of the
+ * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
+ * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
+ * VirtualBox OSE distribution, in which case the provisions of the
+ * CDDL are applicable instead of those of the GPL.
+ *
+ * You may elect to license modified versions of this file under the
+ * terms and conditions of either the GPL or the CDDL or both.
+ */
+
+#ifndef VBOX_INCLUDED_vmm_vm_h
+#define VBOX_INCLUDED_vmm_vm_h
+#ifndef RT_WITHOUT_PRAGMA_ONCE
+# pragma once
+#endif
+
+#ifndef VBOX_FOR_DTRACE_LIB
+# ifndef USING_VMM_COMMON_DEFS
+#  error "Compile job does not include VMM_COMMON_DEFS from src/VBox/Config.kmk - make sure you really need to include this file!"
+# endif
+# include <iprt/param.h>
+# include <VBox/param.h>
+# include <VBox/types.h>
+# include <VBox/vmm/cpum.h>
+# include <VBox/vmm/stam.h>
+# include <VBox/vmm/vmapi.h>
+# include <VBox/vmm/vmm.h>
+# include <VBox/sup.h>
+#else
+# pragma D depends_on library vbox-types.d
+# pragma D depends_on library CPUMInternal.d
+# define VMM_INCLUDED_SRC_include_CPUMInternal_h
+#endif
+
+
+
+/** @defgroup grp_vm    The Virtual Machine
+ * @ingroup grp_vmm
+ * @{
+ */
+
+/**
+ * The state of a Virtual CPU.
+ *
+ * The basic state indicated here is whether the CPU has been started or not. In
+ * addition, there are sub-states when started for assisting scheduling (GVMM
+ * mostly).
+ *
+ * The transition out of the STOPPED state is done by a vmR3PowerOn.
+ * The transition back to the STOPPED state is done by vmR3PowerOff.
+ *
+ * (Alternatively we could let vmR3PowerOn start CPU 0 only and let the SPIP
+ * handling switch on the other CPUs. Then vmR3Reset would stop all but CPU 0.)
+ */
+typedef enum VMCPUSTATE
+{
+    /** The customary invalid zero. */
+    VMCPUSTATE_INVALID = 0,
+
+    /** Virtual CPU has not yet been started.  */
+    VMCPUSTATE_STOPPED,
+
+    /** CPU started. */
+    VMCPUSTATE_STARTED,
+    /** CPU started in HM context. */
+    VMCPUSTATE_STARTED_HM,
+    /** Executing guest code and can be poked (RC or STI bits of HM). */
+    VMCPUSTATE_STARTED_EXEC,
+    /** Executing guest code using NEM. */
+    VMCPUSTATE_STARTED_EXEC_NEM,
+    VMCPUSTATE_STARTED_EXEC_NEM_WAIT,
+    VMCPUSTATE_STARTED_EXEC_NEM_CANCELED,
+    /** Halted. */
+    VMCPUSTATE_STARTED_HALTED,
+
+    /** The end of valid virtual CPU states. */
+    VMCPUSTATE_END,
+
+    /** Ensure 32-bit type. */
+    VMCPUSTATE_32BIT_HACK = 0x7fffffff
+} VMCPUSTATE;
+
+/** Enables 64-bit FFs. */
+#define VMCPU_WITH_64_BIT_FFS
+
+
+/**
+ * The cross context virtual CPU structure.
+ *
+ * Run 'kmk run-struct-tests' (from src/VBox/VMM if you like) after updating!
+ */
+typedef struct VMCPU
+{
+    /** @name Volatile per-cpu data.
+     * @{ */
+    /** Per CPU forced action.
+     * See the VMCPU_FF_* \#defines. Updated atomically. */
+#ifdef VMCPU_WITH_64_BIT_FFS
+    uint64_t volatile       fLocalForcedActions;
+#else
+    uint32_t volatile       fLocalForcedActions;
+    uint32_t                fForLocalForcedActionsExpansion;
+#endif
+    /** The CPU state. */
+    VMCPUSTATE volatile     enmState;
+
+    /** Which host CPU ID is this EMT running on.
+     * Only valid when in RC or HMR0 with scheduling disabled. */
+    RTCPUID volatile        idHostCpu;
+    /** The CPU set index corresponding to idHostCpu, UINT32_MAX if not valid.
+     * @remarks Best to make sure iHostCpuSet shares cache line with idHostCpu! */
+    uint32_t volatile       iHostCpuSet;
+    /** Padding up to 64 bytes. */
+    uint8_t                 abAlignment0[64 - 20];
+    /** @} */
+
+    /** IEM part.
+     * @remarks This comes first as it allows the use of 8-bit immediates for the
+     *          first 64 bytes of the structure, reducing code size a wee bit. */
+#ifdef VMM_INCLUDED_SRC_include_IEMInternal_h /* For PDB hacking. */
+    union VMCPUUNIONIEMFULL
+#else
+    union VMCPUUNIONIEMSTUB
+#endif
+    {
+#ifdef VMM_INCLUDED_SRC_include_IEMInternal_h
+        struct IEMCPU       s;
+#endif
+        uint8_t             padding[18496];     /* multiple of 64 */
+    } iem;
+
+    /** @name Static per-cpu data.
+     * (Putting this after IEM, hoping that it's less frequently used than it.)
+     * @{ */
+    /** Ring-3 Host Context VM Pointer. */
+    PVMR3                   pVMR3;
+    /** Ring-0 Host Context VM Pointer, currently used by VTG/dtrace. */
+    RTR0PTR                 pVCpuR0ForVtg;
+    /** Raw-mode Context VM Pointer. */
+    uint32_t                pVMRC;
+    /** Padding for new raw-mode (long mode).   */
+    uint32_t                pVMRCPadding;
+    /** Pointer to the ring-3 UVMCPU structure. */
+    PUVMCPU                 pUVCpu;
+    /** The native thread handle. */
+    RTNATIVETHREAD          hNativeThread;
+    /** The native R0 thread handle. (different from the R3 handle!) */
+    RTNATIVETHREAD          hNativeThreadR0;
+    /** The CPU ID.
+     * This is the index into the VM::aCpu array. */
+#ifdef IN_RING0
+    VMCPUID                 idCpuUnsafe;
+#else
+    VMCPUID                 idCpu;
+#endif
+
+    /** Align the structures below bit on a 64-byte boundary and make sure it starts
+     * at the same offset in both 64-bit and 32-bit builds.
+     *
+     * @remarks The alignments of the members that are larger than 48 bytes should be
+     *          64-byte for cache line reasons. structs containing small amounts of
+     *          data could be lumped together at the end with a < 64 byte padding
+     *          following it (to grow into and align the struct size).
+     */
+    uint8_t                 abAlignment1[64 - 5 * (HC_ARCH_BITS == 32 ? 4 : 8) - 8 - 4];
+    /** @} */
+
+    /** HM part. */
+    union VMCPUUNIONHM
+    {
+#ifdef VMM_INCLUDED_SRC_include_HMInternal_h
+        struct HMCPU    s;
+#endif
+        uint8_t             padding[5888];      /* multiple of 64 */
+    } hm;
+
+    /** NEM part. */
+    union VMCPUUNIONNEM
+    {
+#ifdef VMM_INCLUDED_SRC_include_NEMInternal_h
+        struct NEMCPU       s;
+#endif
+        uint8_t             padding[512];       /* multiple of 64 */
+    } nem;
+
+    /** TRPM part. */
+    union VMCPUUNIONTRPM
+    {
+#ifdef VMM_INCLUDED_SRC_include_TRPMInternal_h
+        struct TRPMCPU      s;
+#endif
+        uint8_t             padding[128];       /* multiple of 64 */
+    } trpm;
+
+    /** TM part. */
+    union VMCPUUNIONTM
+    {
+#ifdef VMM_INCLUDED_SRC_include_TMInternal_h
+        struct TMCPU        s;
+#endif
+        uint8_t             padding[5760];      /* multiple of 64 */
+    } tm;
+
+    /** VMM part. */
+    union VMCPUUNIONVMM
+    {
+#ifdef VMM_INCLUDED_SRC_include_VMMInternal_h
+        struct VMMCPU       s;
+#endif
+        uint8_t             padding[960];       /* multiple of 64 */
+    } vmm;
+
+    /** PDM part. */
+    union VMCPUUNIONPDM
+    {
+#ifdef VMM_INCLUDED_SRC_include_PDMInternal_h
+        struct PDMCPU       s;
+#endif
+        uint8_t             padding[256];       /* multiple of 64 */
+    } pdm;
+
+    /** IOM part. */
+    union VMCPUUNIONIOM
+    {
+#ifdef VMM_INCLUDED_SRC_include_IOMInternal_h
+        struct IOMCPU       s;
+#endif
+        uint8_t             padding[512];       /* multiple of 64 */
+    } iom;
+
+    /** DBGF part.
+     * @todo Combine this with other tiny structures. */
+    union VMCPUUNIONDBGF
+    {
+#ifdef VMM_INCLUDED_SRC_include_DBGFInternal_h
+        struct DBGFCPU      s;
+#endif
+        uint8_t             padding[256];       /* multiple of 64 */
+    } dbgf;
+
+    /** GIM part. */
+    union VMCPUUNIONGIM
+    {
+#ifdef VMM_INCLUDED_SRC_include_GIMInternal_h
+        struct GIMCPU s;
+#endif
+        uint8_t             padding[512];       /* multiple of 64 */
+    } gim;
+
+    /** APIC part. */
+    union VMCPUUNIONAPIC
+    {
+#ifdef VMM_INCLUDED_SRC_include_APICInternal_h
+        struct APICCPU      s;
+#endif
+        uint8_t             padding[1792];      /* multiple of 64 */
+    } apic;
+
+    /*
+     * Some less frequently used global members that doesn't need to take up
+     * precious space at the head of the structure.
+     */
+
+    /** Trace groups enable flags.  */
+    uint32_t                fTraceGroups;                           /* 64 / 44 */
+    /** State data for use by ad hoc profiling. */
+    uint32_t                uAdHoc;
+    /** Profiling samples for use by ad hoc profiling. */
+    STAMPROFILEADV          aStatAdHoc[8];                          /* size: 40*8 = 320 */
+
+    /** Align the following members on page boundary. */
+    uint8_t                 abAlignment2[1336];
+
+    /** PGM part. */
+    union VMCPUUNIONPGM
+    {
+#ifdef VMM_INCLUDED_SRC_include_PGMInternal_h
+        struct PGMCPU       s;
+#endif
+        uint8_t             padding[4096];      /* multiple of 4096 */
+    } pgm;
+
+    /** CPUM part. */
+    union VMCPUUNIONCPUM
+    {
+#ifdef VMM_INCLUDED_SRC_include_CPUMInternal_h
+        struct CPUMCPU      s;
+#endif
+#ifdef VMCPU_INCL_CPUM_GST_CTX
+        /** The guest CPUM context for direct use by execution engines.
+         * This is not for general consumption, but for HM, REM, IEM, and maybe a few
+         * others.  The rest will use the function based CPUM API. */
+        CPUMCTX             GstCtx;
+#endif
+        uint8_t             padding[4096];      /* multiple of 4096 */
+    } cpum;
+
+    /** EM part. */
+    union VMCPUUNIONEM
+    {
+#ifdef VMM_INCLUDED_SRC_include_EMInternal_h
+        struct EMCPU        s;
+#endif
+        uint8_t             padding[40960];      /* multiple of 4096 */
+    } em;
+} VMCPU;
+
+
+#ifndef VBOX_FOR_DTRACE_LIB
+AssertCompileSizeAlignment(VMCPU, 4096);
+
+/** @name Operations on VMCPU::enmState
+ * @{ */
+/** Gets the VMCPU state. */
+#define VMCPU_GET_STATE(pVCpu)              ( (pVCpu)->enmState )
+/** Sets the VMCPU state. */
+#define VMCPU_SET_STATE(pVCpu, enmNewState) \
+    ASMAtomicWriteU32((uint32_t volatile *)&(pVCpu)->enmState, (enmNewState))
+/** Cmpares and sets the VMCPU state. */
+#define VMCPU_CMPXCHG_STATE(pVCpu, enmNewState, enmOldState) \
+    ASMAtomicCmpXchgU32((uint32_t volatile *)&(pVCpu)->enmState, (enmNewState), (enmOldState))
+/** Checks the VMCPU state. */
+#ifdef VBOX_STRICT
+# define VMCPU_ASSERT_STATE(pVCpu, enmExpectedState) \
+    do { \
+        VMCPUSTATE enmState = VMCPU_GET_STATE(pVCpu); \
+        AssertMsg(enmState == (enmExpectedState), \
+                  ("enmState=%d  enmExpectedState=%d idCpu=%u\n", \
+                  enmState, enmExpectedState, (pVCpu)->idCpu)); \
+    } while (0)
+#else
+# define VMCPU_ASSERT_STATE(pVCpu, enmExpectedState) do { } while (0)
+#endif
+/** Tests if the state means that the CPU is started. */
+#define VMCPUSTATE_IS_STARTED(enmState)     ( (enmState) > VMCPUSTATE_STOPPED )
+/** Tests if the state means that the CPU is stopped. */
+#define VMCPUSTATE_IS_STOPPED(enmState)     ( (enmState) == VMCPUSTATE_STOPPED )
+/** @} */
+
+
+/** The name of the raw-mode context VMM Core module. */
+#define VMMRC_MAIN_MODULE_NAME          "VMMRC.rc"
+/** The name of the ring-0 context VMM Core module. */
+#define VMMR0_MAIN_MODULE_NAME          "VMMR0.r0"
+
+
+/** VM Forced Action Flags.
+ *
+ * Use the VM_FF_SET() and VM_FF_CLEAR() macros to change the force
+ * action mask of a VM.
+ *
+ * Available VM bits:
+ *      0, 1, 5, 6, 7, 13, 14, 15, 16, 17, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30
+ *
+ *
+ * Available VMCPU bits:
+ *      14, 15, 36 to 63
+ *
+ * @todo If we run low on VMCPU, we may consider merging the SELM bits
+ *
+ * @{
+ */
+/** The virtual sync clock has been stopped, go to TM until it has been
+ *  restarted... */
+#define VM_FF_TM_VIRTUAL_SYNC               RT_BIT_32(VM_FF_TM_VIRTUAL_SYNC_BIT)
+#define VM_FF_TM_VIRTUAL_SYNC_BIT           2
+/** PDM Queues are pending. */
+#define VM_FF_PDM_QUEUES                    RT_BIT_32(VM_FF_PDM_QUEUES_BIT)
+/** The bit number for VM_FF_PDM_QUEUES. */
+#define VM_FF_PDM_QUEUES_BIT                3
+/** PDM DMA transfers are pending. */
+#define VM_FF_PDM_DMA                       RT_BIT_32(VM_FF_PDM_DMA_BIT)
+/** The bit number for VM_FF_PDM_DMA. */
+#define VM_FF_PDM_DMA_BIT                   4
+/** This action forces the VM to call DBGF so DBGF can service debugger
+ * requests in the emulation thread.
+ * This action flag stays asserted till DBGF clears it.*/
+#define VM_FF_DBGF                          RT_BIT_32(VM_FF_DBGF_BIT)
+/** The bit number for VM_FF_DBGF. */
+#define VM_FF_DBGF_BIT                      8
+/** This action forces the VM to service pending requests from other
+ * thread or requests which must be executed in another context. */
+#define VM_FF_REQUEST                       RT_BIT_32(VM_FF_REQUEST_BIT)
+#define VM_FF_REQUEST_BIT                   9
+/** Check for VM state changes and take appropriate action. */
+#define VM_FF_CHECK_VM_STATE                RT_BIT_32(VM_FF_CHECK_VM_STATE_BIT)
+/** The bit number for VM_FF_CHECK_VM_STATE. */
+#define VM_FF_CHECK_VM_STATE_BIT            10
+/** Reset the VM. (postponed) */
+#define VM_FF_RESET                         RT_BIT_32(VM_FF_RESET_BIT)
+/** The bit number for VM_FF_RESET. */
+#define VM_FF_RESET_BIT                     11
+/** EMT rendezvous in VMM. */
+#define VM_FF_EMT_RENDEZVOUS                RT_BIT_32(VM_FF_EMT_RENDEZVOUS_BIT)
+/** The bit number for VM_FF_EMT_RENDEZVOUS. */
+#define VM_FF_EMT_RENDEZVOUS_BIT            12
+
+/** PGM needs to allocate handy pages. */
+#define VM_FF_PGM_NEED_HANDY_PAGES          RT_BIT_32(VM_FF_PGM_NEED_HANDY_PAGES_BIT)
+#define VM_FF_PGM_NEED_HANDY_PAGES_BIT      18
+/** PGM is out of memory.
+ * Abandon all loops and code paths which can be resumed and get up to the EM
+ * loops. */
+#define VM_FF_PGM_NO_MEMORY                 RT_BIT_32(VM_FF_PGM_NO_MEMORY_BIT)
+#define VM_FF_PGM_NO_MEMORY_BIT             19
+ /** PGM is about to perform a lightweight pool flush
+  *  Guest SMP: all EMT threads should return to ring 3
+  */
+#define VM_FF_PGM_POOL_FLUSH_PENDING        RT_BIT_32(VM_FF_PGM_POOL_FLUSH_PENDING_BIT)
+#define VM_FF_PGM_POOL_FLUSH_PENDING_BIT    20
+/** Suspend the VM - debug only. */
+#define VM_FF_DEBUG_SUSPEND                 RT_BIT_32(VM_FF_DEBUG_SUSPEND_BIT)
+#define VM_FF_DEBUG_SUSPEND_BIT             31
+
+
+/** This action forces the VM to check any pending interrupts on the APIC. */
+#define VMCPU_FF_INTERRUPT_APIC             RT_BIT_64(VMCPU_FF_INTERRUPT_APIC_BIT)
+#define VMCPU_FF_INTERRUPT_APIC_BIT         0
+/** This action forces the VM to check any pending interrups on the PIC. */
+#define VMCPU_FF_INTERRUPT_PIC              RT_BIT_64(VMCPU_FF_INTERRUPT_PIC_BIT)
+#define VMCPU_FF_INTERRUPT_PIC_BIT          1
+/** This action forces the VM to schedule and run pending timer (TM).
+ * @remarks Don't move - PATM compatibility.  */
+#define VMCPU_FF_TIMER                      RT_BIT_64(VMCPU_FF_TIMER_BIT)
+#define VMCPU_FF_TIMER_BIT                  2
+/** This action forces the VM to check any pending NMIs. */
+#define VMCPU_FF_INTERRUPT_NMI              RT_BIT_64(VMCPU_FF_INTERRUPT_NMI_BIT)
+#define VMCPU_FF_INTERRUPT_NMI_BIT          3
+/** This action forces the VM to check any pending SMIs. */
+#define VMCPU_FF_INTERRUPT_SMI              RT_BIT_64(VMCPU_FF_INTERRUPT_SMI_BIT)
+#define VMCPU_FF_INTERRUPT_SMI_BIT          4
+/** PDM critical section unlocking is pending, process promptly upon return to R3. */
+#define VMCPU_FF_PDM_CRITSECT               RT_BIT_64(VMCPU_FF_PDM_CRITSECT_BIT)
+#define VMCPU_FF_PDM_CRITSECT_BIT           5
+/** Special EM internal force flag that is used by EMUnhaltAndWakeUp() to force
+ * the virtual CPU out of the next (/current) halted state.  It is not processed
+ * nor cleared by emR3ForcedActions (similar to VMCPU_FF_BLOCK_NMIS), instead it
+ * is cleared the next time EM leaves the HALTED state. */
+#define VMCPU_FF_UNHALT                     RT_BIT_64(VMCPU_FF_UNHALT_BIT)
+#define VMCPU_FF_UNHALT_BIT                 6
+/** Pending IEM action (mask). */
+#define VMCPU_FF_IEM                        RT_BIT_64(VMCPU_FF_IEM_BIT)
+/** Pending IEM action (bit number). */
+#define VMCPU_FF_IEM_BIT                    7
+/** Pending APIC action (bit number). */
+#define VMCPU_FF_UPDATE_APIC_BIT            8
+/** This action forces the VM to update APIC's asynchronously arrived
+ *  interrupts as pending interrupts. */
+#define VMCPU_FF_UPDATE_APIC                RT_BIT_64(VMCPU_FF_UPDATE_APIC_BIT)
+/** This action forces the VM to service pending requests from other
+ * thread or requests which must be executed in another context. */
+#define VMCPU_FF_REQUEST                    RT_BIT_64(VMCPU_FF_REQUEST_BIT)
+#define VMCPU_FF_REQUEST_BIT                9
+/** Pending DBGF event (alternative to passing VINF_EM_DBG_EVENT around).  */
+#define VMCPU_FF_DBGF                       RT_BIT_64(VMCPU_FF_DBGF_BIT)
+/** The bit number for VMCPU_FF_DBGF. */
+#define VMCPU_FF_DBGF_BIT                   10
+/** This action forces the VM to service any pending updates to CR3 (used only
+ *  by HM). */
+/** Hardware virtualized nested-guest interrupt pending. */
+#define VMCPU_FF_INTERRUPT_NESTED_GUEST     RT_BIT_64(VMCPU_FF_INTERRUPT_NESTED_GUEST_BIT)
+#define VMCPU_FF_INTERRUPT_NESTED_GUEST_BIT 11
+#define VMCPU_FF_HM_UPDATE_CR3              RT_BIT_64(VMCPU_FF_HM_UPDATE_CR3_BIT)
+#define VMCPU_FF_HM_UPDATE_CR3_BIT          12
+/** This action forces the VM to service any pending updates to PAE PDPEs (used
+ *  only by HM). */
+#define VMCPU_FF_HM_UPDATE_PAE_PDPES        RT_BIT_64(VMCPU_FF_HM_UPDATE_PAE_PDPES_BIT)
+#define VMCPU_FF_HM_UPDATE_PAE_PDPES_BIT    13
+/** This action forces the VM to resync the page tables before going
+ * back to execute guest code. (GLOBAL FLUSH) */
+#define VMCPU_FF_PGM_SYNC_CR3               RT_BIT_64(VMCPU_FF_PGM_SYNC_CR3_BIT)
+#define VMCPU_FF_PGM_SYNC_CR3_BIT           16
+/** Same as VM_FF_PGM_SYNC_CR3 except that global pages can be skipped.
+ * (NON-GLOBAL FLUSH) */
+#define VMCPU_FF_PGM_SYNC_CR3_NON_GLOBAL    RT_BIT_64(VMCPU_FF_PGM_SYNC_CR3_NON_GLOBAL_BIT)
+#define VMCPU_FF_PGM_SYNC_CR3_NON_GLOBAL_BIT 17
+/** Check for pending TLB shootdown actions (deprecated)
+ * Reserved for furture HM re-use if necessary / safe.
+ * Consumer: HM */
+#define VMCPU_FF_TLB_SHOOTDOWN_UNUSED       RT_BIT_64(VMCPU_FF_TLB_SHOOTDOWN_UNUSED_BIT)
+#define VMCPU_FF_TLB_SHOOTDOWN_UNUSED_BIT   18
+/** Check for pending TLB flush action.
+ * Consumer: HM
+ * @todo rename to VMCPU_FF_HM_TLB_FLUSH  */
+#define VMCPU_FF_TLB_FLUSH                  RT_BIT_64(VMCPU_FF_TLB_FLUSH_BIT)
+/** The bit number for VMCPU_FF_TLB_FLUSH. */
+#define VMCPU_FF_TLB_FLUSH_BIT              19
+/* 20 used to be VMCPU_FF_TRPM_SYNC_IDT (raw-mode only). */
+/* 21 used to be VMCPU_FF_SELM_SYNC_TSS (raw-mode only). */
+/* 22 used to be VMCPU_FF_SELM_SYNC_GDT (raw-mode only). */
+/* 23 used to be VMCPU_FF_SELM_SYNC_LDT (raw-mode only). */
+/** Inhibit interrupts pending. See EMGetInhibitInterruptsPC(). */
+#define VMCPU_FF_INHIBIT_INTERRUPTS         RT_BIT_64(VMCPU_FF_INHIBIT_INTERRUPTS_BIT)
+#define VMCPU_FF_INHIBIT_INTERRUPTS_BIT     24
+/** Block injection of non-maskable interrupts to the guest. */
+#define VMCPU_FF_BLOCK_NMIS                 RT_BIT_64(VMCPU_FF_BLOCK_NMIS_BIT)
+#define VMCPU_FF_BLOCK_NMIS_BIT             25
+/** Force return to Ring-3. */
+#define VMCPU_FF_TO_R3                      RT_BIT_64(VMCPU_FF_TO_R3_BIT)
+#define VMCPU_FF_TO_R3_BIT                  28
+/** Force return to ring-3 to service pending I/O or MMIO write.
+ * This is a backup for mechanism VINF_IOM_R3_IOPORT_COMMIT_WRITE and
+ * VINF_IOM_R3_MMIO_COMMIT_WRITE, allowing VINF_EM_DBG_BREAKPOINT and similar
+ * status codes to be propagated at the same time without loss. */
+#define VMCPU_FF_IOM                        RT_BIT_64(VMCPU_FF_IOM_BIT)
+#define VMCPU_FF_IOM_BIT                    29
+/* 30 used to be VMCPU_FF_CPUM */
+/** VMX-preemption timer expired. */
+#define VMCPU_FF_VMX_PREEMPT_TIMER          RT_BIT_64(VMCPU_FF_VMX_PREEMPT_TIMER_BIT)
+#define VMCPU_FF_VMX_PREEMPT_TIMER_BIT      31
+/** Pending MTF (Monitor Trap Flag) event.  */
+#define VMCPU_FF_VMX_MTF                    RT_BIT_64(VMCPU_FF_VMX_MTF_BIT)
+#define VMCPU_FF_VMX_MTF_BIT                32
+/** VMX APIC-write emulation pending.  */
+#define VMCPU_FF_VMX_APIC_WRITE             RT_BIT_64(VMCPU_FF_VMX_APIC_WRITE_BIT)
+#define VMCPU_FF_VMX_APIC_WRITE_BIT         33
+/** VMX interrupt-window event pending. */
+#define VMCPU_FF_VMX_INT_WINDOW             RT_BIT_64(VMCPU_FF_VMX_INT_WINDOW_BIT)
+#define VMCPU_FF_VMX_INT_WINDOW_BIT         34
+/** VMX NMI-window event pending. */
+#define VMCPU_FF_VMX_NMI_WINDOW             RT_BIT_64(VMCPU_FF_VMX_NMI_WINDOW_BIT)
+#define VMCPU_FF_VMX_NMI_WINDOW_BIT         35
+
+
+/** Externally VM forced actions. Used to quit the idle/wait loop. */
+#define VM_FF_EXTERNAL_SUSPENDED_MASK           (  VM_FF_CHECK_VM_STATE | VM_FF_DBGF | VM_FF_REQUEST | VM_FF_EMT_RENDEZVOUS )
+/** Externally VMCPU forced actions. Used to quit the idle/wait loop. */
+#define VMCPU_FF_EXTERNAL_SUSPENDED_MASK        (  VMCPU_FF_REQUEST  | VMCPU_FF_DBGF )
+
+/** Externally forced VM actions. Used to quit the idle/wait loop. */
+#define VM_FF_EXTERNAL_HALTED_MASK              (  VM_FF_CHECK_VM_STATE | VM_FF_DBGF    | VM_FF_REQUEST \
+                                                 | VM_FF_PDM_QUEUES     | VM_FF_PDM_DMA | VM_FF_EMT_RENDEZVOUS )
+/** Externally forced VMCPU actions. Used to quit the idle/wait loop. */
+#define VMCPU_FF_EXTERNAL_HALTED_MASK           (  VMCPU_FF_UPDATE_APIC | VMCPU_FF_INTERRUPT_APIC | VMCPU_FF_INTERRUPT_PIC \
+                                                 | VMCPU_FF_REQUEST     | VMCPU_FF_INTERRUPT_NMI  | VMCPU_FF_INTERRUPT_SMI \
+                                                 | VMCPU_FF_UNHALT      | VMCPU_FF_TIMER          | VMCPU_FF_DBGF \
+                                                 | VMCPU_FF_INTERRUPT_NESTED_GUEST)
+
+/** High priority VM pre-execution actions. */
+#define VM_FF_HIGH_PRIORITY_PRE_MASK            (  VM_FF_CHECK_VM_STATE | VM_FF_DBGF                 | VM_FF_TM_VIRTUAL_SYNC \
+                                                 | VM_FF_DEBUG_SUSPEND  | VM_FF_PGM_NEED_HANDY_PAGES | VM_FF_PGM_NO_MEMORY \
+                                                 | VM_FF_EMT_RENDEZVOUS )
+/** High priority VMCPU pre-execution actions. */
+#define VMCPU_FF_HIGH_PRIORITY_PRE_MASK         (  VMCPU_FF_TIMER        | VMCPU_FF_INTERRUPT_APIC     | VMCPU_FF_INTERRUPT_PIC \
+                                                 | VMCPU_FF_UPDATE_APIC  | VMCPU_FF_INHIBIT_INTERRUPTS | VMCPU_FF_DBGF \
+                                                 | VMCPU_FF_PGM_SYNC_CR3 | VMCPU_FF_PGM_SYNC_CR3_NON_GLOBAL \
+                                                 | VMCPU_FF_INTERRUPT_NESTED_GUEST | VMCPU_FF_VMX_MTF  | VMCPU_FF_VMX_APIC_WRITE \
+                                                 | VMCPU_FF_VMX_PREEMPT_TIMER | VMCPU_FF_VMX_NMI_WINDOW | VMCPU_FF_VMX_INT_WINDOW )
+
+/** High priority VM pre raw-mode execution mask. */
+#define VM_FF_HIGH_PRIORITY_PRE_RAW_MASK        (  VM_FF_PGM_NEED_HANDY_PAGES | VM_FF_PGM_NO_MEMORY )
+/** High priority VMCPU pre raw-mode execution mask. */
+#define VMCPU_FF_HIGH_PRIORITY_PRE_RAW_MASK     (  VMCPU_FF_PGM_SYNC_CR3 | VMCPU_FF_PGM_SYNC_CR3_NON_GLOBAL \
+                                                 | VMCPU_FF_INHIBIT_INTERRUPTS )
+
+/** High priority post-execution actions. */
+#define VM_FF_HIGH_PRIORITY_POST_MASK           (  VM_FF_PGM_NO_MEMORY )
+/** High priority post-execution actions. */
+#define VMCPU_FF_HIGH_PRIORITY_POST_MASK        (  VMCPU_FF_PDM_CRITSECT \
+                                                 | VMCPU_FF_HM_UPDATE_CR3  | VMCPU_FF_HM_UPDATE_PAE_PDPES \
+                                                 | VMCPU_FF_IEM | VMCPU_FF_IOM )
+
+/** Normal priority VM post-execution actions. */
+#define VM_FF_NORMAL_PRIORITY_POST_MASK         (  VM_FF_CHECK_VM_STATE | VM_FF_DBGF | VM_FF_RESET \
+                                                 | VM_FF_PGM_NO_MEMORY  | VM_FF_EMT_RENDEZVOUS)
+/** Normal priority VMCPU post-execution actions. */
+#define VMCPU_FF_NORMAL_PRIORITY_POST_MASK      ( VMCPU_FF_DBGF )
+
+/** Normal priority VM actions. */
+#define VM_FF_NORMAL_PRIORITY_MASK              (  VM_FF_REQUEST | VM_FF_PDM_QUEUES | VM_FF_PDM_DMA | VM_FF_EMT_RENDEZVOUS)
+/** Normal priority VMCPU actions. */
+#define VMCPU_FF_NORMAL_PRIORITY_MASK           (  VMCPU_FF_REQUEST )
+
+/** Flags to clear before resuming guest execution. */
+#define VMCPU_FF_RESUME_GUEST_MASK              (  VMCPU_FF_TO_R3 )
+
+
+/** VM flags that cause the REP[|NE|E] STRINS loops to yield immediately. */
+#define VM_FF_HIGH_PRIORITY_POST_REPSTR_MASK    (  VM_FF_TM_VIRTUAL_SYNC | VM_FF_PGM_NEED_HANDY_PAGES   | VM_FF_PGM_NO_MEMORY \
+                                                 | VM_FF_EMT_RENDEZVOUS  | VM_FF_PGM_POOL_FLUSH_PENDING | VM_FF_RESET)
+/** VM flags that cause the REP[|NE|E] STRINS loops to yield. */
+#define VM_FF_YIELD_REPSTR_MASK                 (  VM_FF_HIGH_PRIORITY_POST_REPSTR_MASK \
+                                                 | VM_FF_PDM_QUEUES | VM_FF_PDM_DMA | VM_FF_DBGF | VM_FF_DEBUG_SUSPEND )
+/** VMCPU flags that cause the REP[|NE|E] STRINS loops to yield immediately. */
+#ifdef IN_RING3
+# define VMCPU_FF_HIGH_PRIORITY_POST_REPSTR_MASK (  VMCPU_FF_PGM_SYNC_CR3 | VMCPU_FF_PGM_SYNC_CR3_NON_GLOBAL | VMCPU_FF_DBGF \
+                                                  | VMCPU_FF_VMX_MTF )
+#else
+# define VMCPU_FF_HIGH_PRIORITY_POST_REPSTR_MASK (  VMCPU_FF_TO_R3 | VMCPU_FF_IEM | VMCPU_FF_IOM | VMCPU_FF_PGM_SYNC_CR3 \
+                                                  | VMCPU_FF_PGM_SYNC_CR3_NON_GLOBAL | VMCPU_FF_DBGF | VMCPU_FF_VMX_MTF )
+#endif
+/** VMCPU flags that cause the REP[|NE|E] STRINS loops to yield, interrupts
+ *  enabled. */
+#define VMCPU_FF_YIELD_REPSTR_MASK              (  VMCPU_FF_HIGH_PRIORITY_POST_REPSTR_MASK \
+                                                 | VMCPU_FF_INTERRUPT_APIC | VMCPU_FF_UPDATE_APIC   | VMCPU_FF_INTERRUPT_PIC \
+                                                 | VMCPU_FF_INTERRUPT_NMI  | VMCPU_FF_INTERRUPT_SMI | VMCPU_FF_PDM_CRITSECT \
+                                                 | VMCPU_FF_TIMER          | VMCPU_FF_REQUEST       \
+                                                 | VMCPU_FF_INTERRUPT_NESTED_GUEST )
+/** VMCPU flags that cause the REP[|NE|E] STRINS loops to yield, interrupts
+ *  disabled. */
+#define VMCPU_FF_YIELD_REPSTR_NOINT_MASK        (  VMCPU_FF_YIELD_REPSTR_MASK \
+                                                 & ~(  VMCPU_FF_INTERRUPT_APIC | VMCPU_FF_UPDATE_APIC | VMCPU_FF_INTERRUPT_PIC \
+                                                     | VMCPU_FF_INTERRUPT_NESTED_GUEST) )
+
+/** VM Flags that cause the HM loops to go back to ring-3. */
+#define VM_FF_HM_TO_R3_MASK                     (  VM_FF_TM_VIRTUAL_SYNC | VM_FF_PGM_NEED_HANDY_PAGES | VM_FF_PGM_NO_MEMORY \
+                                                 | VM_FF_PDM_QUEUES | VM_FF_EMT_RENDEZVOUS)
+/** VMCPU Flags that cause the HM loops to go back to ring-3. */
+#define VMCPU_FF_HM_TO_R3_MASK                  (  VMCPU_FF_TO_R3 | VMCPU_FF_TIMER | VMCPU_FF_PDM_CRITSECT \
+                                                 | VMCPU_FF_IEM   | VMCPU_FF_IOM)
+
+/** High priority ring-0 VM pre HM-mode execution mask. */
+#define VM_FF_HP_R0_PRE_HM_MASK                 (VM_FF_HM_TO_R3_MASK | VM_FF_REQUEST | VM_FF_PGM_POOL_FLUSH_PENDING | VM_FF_PDM_DMA)
+/** High priority ring-0 VMCPU pre HM-mode execution mask. */
+#define VMCPU_FF_HP_R0_PRE_HM_MASK              (  VMCPU_FF_HM_TO_R3_MASK | VMCPU_FF_PGM_SYNC_CR3 \
+                                                 | VMCPU_FF_PGM_SYNC_CR3_NON_GLOBAL | VMCPU_FF_REQUEST \
+                                                 | VMCPU_FF_VMX_APIC_WRITE | VMCPU_FF_VMX_MTF | VMCPU_FF_VMX_PREEMPT_TIMER)
+/** High priority ring-0 VM pre HM-mode execution mask, single stepping. */
+#define VM_FF_HP_R0_PRE_HM_STEP_MASK            (VM_FF_HP_R0_PRE_HM_MASK & ~(  VM_FF_TM_VIRTUAL_SYNC | VM_FF_PDM_QUEUES  \
+                                                                             | VM_FF_EMT_RENDEZVOUS | VM_FF_REQUEST \
+                                                                             | VM_FF_PDM_DMA) )
+/** High priority ring-0 VMCPU pre HM-mode execution mask, single stepping. */
+#define VMCPU_FF_HP_R0_PRE_HM_STEP_MASK         (VMCPU_FF_HP_R0_PRE_HM_MASK & ~(  VMCPU_FF_TO_R3 | VMCPU_FF_TIMER \
+                                                                                | VMCPU_FF_PDM_CRITSECT | VMCPU_FF_REQUEST) )
+
+/** All the VMX nested-guest flags. */
+#define VMCPU_FF_VMX_ALL_MASK                   (  VMCPU_FF_VMX_PREEMPT_TIMER | VMCPU_FF_VMX_MTF | VMCPU_FF_VMX_APIC_WRITE \
+                                                 | VMCPU_FF_VMX_INT_WINDOW | VMCPU_FF_VMX_NMI_WINDOW )
+
+/** All the forced VM flags. */
+#define VM_FF_ALL_MASK                          (UINT32_MAX)
+/** All the forced VMCPU flags. */
+#define VMCPU_FF_ALL_MASK                       (UINT32_MAX)
+
+/** All the forced VM flags except those related to raw-mode and hardware
+ * assisted execution. */
+#define VM_FF_ALL_REM_MASK                      (~(VM_FF_HIGH_PRIORITY_PRE_RAW_MASK) | VM_FF_PGM_NEED_HANDY_PAGES | VM_FF_PGM_NO_MEMORY)
+/** All the forced VMCPU flags except those related to raw-mode and hardware
+ * assisted execution. */
+#define VMCPU_FF_ALL_REM_MASK                   (~(VMCPU_FF_HIGH_PRIORITY_PRE_RAW_MASK | VMCPU_FF_PDM_CRITSECT | VMCPU_FF_TLB_FLUSH))
+/** @} */
+
+/** @def VM_FF_SET
+ * Sets a single force action flag.
+ *
+ * @param   pVM     The cross context VM structure.
+ * @param   fFlag   The flag to set.
+ */
+#define VM_FF_SET(pVM, fFlag) do { \
+        AssertCompile(RT_IS_POWER_OF_TWO(fFlag)); \
+        AssertCompile((fFlag) == RT_BIT_32(fFlag##_BIT)); \
+        ASMAtomicOrU32(&(pVM)->fGlobalForcedActions, (fFlag)); \
+    } while (0)
+
+/** @def VMCPU_FF_SET
+ * Sets a single force action flag for the given VCPU.
+ *
+ * @param   pVCpu   The cross context virtual CPU structure.
+ * @param   fFlag   The flag to set.
+ * @sa      VMCPU_FF_SET_MASK
+ */
+#ifdef VMCPU_WITH_64_BIT_FFS
+# define VMCPU_FF_SET(pVCpu, fFlag) do { \
+        AssertCompile(RT_IS_POWER_OF_TWO(fFlag)); \
+        AssertCompile((fFlag) == RT_BIT_64(fFlag##_BIT)); \
+        ASMAtomicBitSet(&(pVCpu)->fLocalForcedActions, fFlag##_BIT); \
+    } while (0)
+#else
+# define VMCPU_FF_SET(pVCpu, fFlag) do { \
+        AssertCompile(RT_IS_POWER_OF_TWO(fFlag)); \
+        AssertCompile((fFlag) == RT_BIT_32(fFlag##_BIT)); \
+        ASMAtomicOrU32(&(pVCpu)->fLocalForcedActions, (fFlag)); \
+    } while (0)
+#endif
+
+/** @def VMCPU_FF_SET_MASK
+ * Sets a two or more force action flag for the given VCPU.
+ *
+ * @param   pVCpu   The cross context virtual CPU structure.
+ * @param   fFlags  The flags to set.
+ * @sa      VMCPU_FF_SET
+ */
+#ifdef VMCPU_WITH_64_BIT_FFS
+# if ARCH_BITS > 32
+#  define VMCPU_FF_SET_MASK(pVCpu, fFlags) \
+    do { ASMAtomicOrU64(&pVCpu->fLocalForcedActions, (fFlags)); } while (0)
+# else
+#  define VMCPU_FF_SET_MASK(pVCpu, fFlags) do { \
+        if (!((fFlags) >> 32)) ASMAtomicOrU32((uint32_t volatile *)&pVCpu->fLocalForcedActions, (uint32_t)(fFlags)); \
+        else ASMAtomicOrU64(&pVCpu->fLocalForcedActions, (fFlags)); \
+    } while (0)
+# endif
+#else
+# define VMCPU_FF_SET_MASK(pVCpu, fFlags) \
+    do { ASMAtomicOrU32(&pVCpu->fLocalForcedActions, (fFlags)); } while (0)
+#endif
+
+/** @def VM_FF_CLEAR
+ * Clears a single force action flag.
+ *
+ * @param   pVM     The cross context VM structure.
+ * @param   fFlag   The flag to clear.
+ */
+#define VM_FF_CLEAR(pVM, fFlag) do { \
+        AssertCompile(RT_IS_POWER_OF_TWO(fFlag)); \
+        AssertCompile((fFlag) == RT_BIT_32(fFlag##_BIT)); \
+        ASMAtomicAndU32(&(pVM)->fGlobalForcedActions, ~(fFlag)); \
+    } while (0)
+
+/** @def VMCPU_FF_CLEAR
+ * Clears a single force action flag for the given VCPU.
+ *
+ * @param   pVCpu   The cross context virtual CPU structure.
+ * @param   fFlag   The flag to clear.
+ */
+#ifdef VMCPU_WITH_64_BIT_FFS
+# define VMCPU_FF_CLEAR(pVCpu, fFlag) do { \
+        AssertCompile(RT_IS_POWER_OF_TWO(fFlag)); \
+        AssertCompile((fFlag) == RT_BIT_64(fFlag##_BIT)); \
+        ASMAtomicBitClear(&(pVCpu)->fLocalForcedActions, fFlag##_BIT); \
+    } while (0)
+#else
+# define VMCPU_FF_CLEAR(pVCpu, fFlag) do { \
+        AssertCompile(RT_IS_POWER_OF_TWO(fFlag)); \
+        AssertCompile((fFlag) == RT_BIT_32(fFlag##_BIT)); \
+        ASMAtomicAndU32(&(pVCpu)->fLocalForcedActions, ~(fFlag)); \
+    } while (0)
+#endif
+
+/** @def VMCPU_FF_CLEAR_MASK
+ * Clears two or more force action flags for the given VCPU.
+ *
+ * @param   pVCpu   The cross context virtual CPU structure.
+ * @param   fFlags  The flags to clear.
+ */
+#ifdef VMCPU_WITH_64_BIT_FFS
+# if ARCH_BITS > 32
+# define VMCPU_FF_CLEAR_MASK(pVCpu, fFlags) \
+    do { ASMAtomicAndU64(&(pVCpu)->fLocalForcedActions, ~(fFlags)); } while (0)
+# else
+# define VMCPU_FF_CLEAR_MASK(pVCpu, fFlags) do { \
+        if (!((fFlags) >> 32)) ASMAtomicAndU32((uint32_t volatile *)&(pVCpu)->fLocalForcedActions, ~(uint32_t)(fFlags)); \
+        else ASMAtomicAndU64(&(pVCpu)->fLocalForcedActions, ~(fFlags)); \
+    } while (0)
+# endif
+#else
+# define VMCPU_FF_CLEAR_MASK(pVCpu, fFlags) \
+    do { ASMAtomicAndU32(&(pVCpu)->fLocalForcedActions, ~(fFlags)); } while (0)
+#endif
+
+/** @def VM_FF_IS_SET
+ * Checks if single a force action flag is set.
+ *
+ * @param   pVM     The cross context VM structure.
+ * @param   fFlag   The flag to check.
+ * @sa      VM_FF_IS_ANY_SET
+ */
+#if !defined(VBOX_STRICT) || !defined(RT_COMPILER_SUPPORTS_LAMBDA)
+# define VM_FF_IS_SET(pVM, fFlag)           RT_BOOL((pVM)->fGlobalForcedActions & (fFlag))
+#else
+# define VM_FF_IS_SET(pVM, fFlag) \
+    ([](PVM a_pVM) -> bool \
+    { \
+        AssertCompile(RT_IS_POWER_OF_TWO(fFlag)); \
+        AssertCompile((fFlag) == RT_BIT_32(fFlag##_BIT)); \
+        return RT_BOOL(a_pVM->fGlobalForcedActions & (fFlag)); \
+    }(pVM))
+#endif
+
+/** @def VMCPU_FF_IS_SET
+ * Checks if a single force action flag is set for the given VCPU.
+ *
+ * @param   pVCpu   The cross context virtual CPU structure.
+ * @param   fFlag   The flag to check.
+ * @sa      VMCPU_FF_IS_ANY_SET
+ */
+#if !defined(VBOX_STRICT) || !defined(RT_COMPILER_SUPPORTS_LAMBDA)
+# define VMCPU_FF_IS_SET(pVCpu, fFlag)      RT_BOOL((pVCpu)->fLocalForcedActions & (fFlag))
+#else
+# define VMCPU_FF_IS_SET(pVCpu, fFlag) \
+    ([](PCVMCPU a_pVCpu) -> bool \
+    { \
+        AssertCompile(RT_IS_POWER_OF_TWO(fFlag)); \
+        AssertCompile((fFlag) == RT_BIT_64(fFlag##_BIT)); \
+        return RT_BOOL(a_pVCpu->fLocalForcedActions & (fFlag)); \
+    }(pVCpu))
+#endif
+
+/** @def VM_FF_IS_ANY_SET
+ * Checks if one or more force action in the specified set is pending.
+ *
+ * @param   pVM     The cross context VM structure.
+ * @param   fFlags  The flags to check for.
+ * @sa      VM_FF_IS_SET
+ */
+#define VM_FF_IS_ANY_SET(pVM, fFlags)       RT_BOOL((pVM)->fGlobalForcedActions & (fFlags))
+
+/** @def VMCPU_FF_IS_ANY_SET
+ * Checks if two or more force action flags in the specified set is set for the given VCPU.
+ *
+ * @param   pVCpu   The cross context virtual CPU structure.
+ * @param   fFlags  The flags to check for.
+ * @sa      VMCPU_FF_IS_SET
+ */
+#define VMCPU_FF_IS_ANY_SET(pVCpu, fFlags)  RT_BOOL((pVCpu)->fLocalForcedActions & (fFlags))
+
+/** @def VM_FF_TEST_AND_CLEAR
+ * Checks if one (!) force action in the specified set is pending and clears it atomically
+ *
+ * @returns true if the bit was set.
+ * @returns false if the bit was clear.
+ * @param   pVM     The cross context VM structure.
+ * @param   fFlag   Flag constant to check and clear (_BIT is appended).
+ */
+#define VM_FF_TEST_AND_CLEAR(pVM, fFlag)    (ASMAtomicBitTestAndClear(&(pVM)->fGlobalForcedActions, fFlag##_BIT))
+
+/** @def VMCPU_FF_TEST_AND_CLEAR
+ * Checks if one (!) force action in the specified set is pending and clears it atomically
+ *
+ * @returns true if the bit was set.
+ * @returns false if the bit was clear.
+ * @param   pVCpu   The cross context virtual CPU structure.
+ * @param   fFlag   Flag constant to check and clear (_BIT is appended).
+ */
+#define VMCPU_FF_TEST_AND_CLEAR(pVCpu, fFlag) (ASMAtomicBitTestAndClear(&(pVCpu)->fLocalForcedActions, fFlag##_BIT))
+
+/** @def VM_FF_IS_PENDING_EXCEPT
+ * Checks if one or more force action in the specified set is pending while one
+ * or more other ones are not.
+ *
+ * @param   pVM     The cross context VM structure.
+ * @param   fFlags  The flags to check for.
+ * @param   fExcpt  The flags that should not be set.
+ */
+#define VM_FF_IS_PENDING_EXCEPT(pVM, fFlags, fExcpt) \
+    ( ((pVM)->fGlobalForcedActions & (fFlags)) && !((pVM)->fGlobalForcedActions & (fExcpt)) )
+
+/** @def VM_IS_EMT
+ * Checks if the current thread is the emulation thread (EMT).
+ *
+ * @remark  The ring-0 variation will need attention if we expand the ring-0
+ *          code to let threads other than EMT mess around with the VM.
+ */
+#ifdef IN_RC
+# define VM_IS_EMT(pVM)                     true
+#else
+# define VM_IS_EMT(pVM)                     (VMMGetCpu(pVM) != NULL)
+#endif
+
+/** @def VMCPU_IS_EMT
+ * Checks if the current thread is the emulation thread (EMT) for the specified
+ * virtual CPU.
+ */
+#ifdef IN_RC
+# define VMCPU_IS_EMT(pVCpu)                true
+#else
+# define VMCPU_IS_EMT(pVCpu)                ((pVCpu) && ((pVCpu) == VMMGetCpu((pVCpu)->CTX_SUFF(pVM))))
+#endif
+
+/** @def VM_ASSERT_EMT
+ * Asserts that the current thread IS the emulation thread (EMT).
+ */
+#ifdef IN_RC
+# define VM_ASSERT_EMT(pVM)                 Assert(VM_IS_EMT(pVM))
+#elif defined(IN_RING0)
+# define VM_ASSERT_EMT(pVM)                 Assert(VM_IS_EMT(pVM))
+#else
+# define VM_ASSERT_EMT(pVM) \
+    AssertMsg(VM_IS_EMT(pVM), \
+        ("Not emulation thread! Thread=%RTnthrd ThreadEMT=%RTnthrd\n", RTThreadNativeSelf(), VMR3GetVMCPUNativeThread(pVM)))
+#endif
+
+/** @def VMCPU_ASSERT_EMT
+ * Asserts that the current thread IS the emulation thread (EMT) of the
+ * specified virtual CPU.
+ */
+#ifdef IN_RC
+# define VMCPU_ASSERT_EMT(pVCpu)            Assert(VMCPU_IS_EMT(pVCpu))
+#elif defined(IN_RING0)
+# define VMCPU_ASSERT_EMT(pVCpu)            AssertMsg(VMCPU_IS_EMT(pVCpu), \
+                                                      ("Not emulation thread! Thread=%RTnthrd ThreadEMT=%RTnthrd idCpu=%u\n", \
+                                                      RTThreadNativeSelf(), (pVCpu) ? (pVCpu)->hNativeThreadR0 : 0, \
+                                                      (pVCpu) ? (pVCpu)->idCpu : 0))
+#else
+# define VMCPU_ASSERT_EMT(pVCpu)            AssertMsg(VMCPU_IS_EMT(pVCpu), \
+                                                      ("Not emulation thread! Thread=%RTnthrd ThreadEMT=%RTnthrd idCpu=%#x\n", \
+                                                      RTThreadNativeSelf(), (pVCpu)->hNativeThread, (pVCpu)->idCpu))
+#endif
+
+/** @def VM_ASSERT_EMT_RETURN
+ * Asserts that the current thread IS the emulation thread (EMT) and returns if it isn't.
+ */
+#ifdef IN_RC
+# define VM_ASSERT_EMT_RETURN(pVM, rc)      AssertReturn(VM_IS_EMT(pVM), (rc))
+#elif defined(IN_RING0)
+# define VM_ASSERT_EMT_RETURN(pVM, rc)      AssertReturn(VM_IS_EMT(pVM), (rc))
+#else
+# define VM_ASSERT_EMT_RETURN(pVM, rc) \
+    AssertMsgReturn(VM_IS_EMT(pVM), \
+        ("Not emulation thread! Thread=%RTnthrd ThreadEMT=%RTnthrd\n", RTThreadNativeSelf(), VMR3GetVMCPUNativeThread(pVM)), \
+        (rc))
+#endif
+
+/** @def VMCPU_ASSERT_EMT_RETURN
+ * Asserts that the current thread IS the emulation thread (EMT) and returns if it isn't.
+ */
+#ifdef IN_RC
+# define VMCPU_ASSERT_EMT_RETURN(pVCpu, rc) AssertReturn(VMCPU_IS_EMT(pVCpu), (rc))
+#elif defined(IN_RING0)
+# define VMCPU_ASSERT_EMT_RETURN(pVCpu, rc) AssertReturn(VMCPU_IS_EMT(pVCpu), (rc))
+#else
+# define VMCPU_ASSERT_EMT_RETURN(pVCpu, rc) \
+    AssertMsgReturn(VMCPU_IS_EMT(pVCpu), \
+                    ("Not emulation thread! Thread=%RTnthrd ThreadEMT=%RTnthrd idCpu=%#x\n", \
+                     RTThreadNativeSelf(), (pVCpu)->hNativeThread, (pVCpu)->idCpu), \
+                    (rc))
+#endif
+
+/** @def VMCPU_ASSERT_EMT_OR_GURU
+ * Asserts that the current thread IS the emulation thread (EMT) of the
+ * specified virtual CPU.
+ */
+#if defined(IN_RC) || defined(IN_RING0)
+# define VMCPU_ASSERT_EMT_OR_GURU(pVCpu)    Assert(   VMCPU_IS_EMT(pVCpu) \
+                                                   || pVCpu->CTX_SUFF(pVM)->enmVMState == VMSTATE_GURU_MEDITATION \
+                                                   || pVCpu->CTX_SUFF(pVM)->enmVMState == VMSTATE_GURU_MEDITATION_LS )
+#else
+# define VMCPU_ASSERT_EMT_OR_GURU(pVCpu) \
+    AssertMsg(   VMCPU_IS_EMT(pVCpu) \
+              || pVCpu->CTX_SUFF(pVM)->enmVMState == VMSTATE_GURU_MEDITATION \
+              || pVCpu->CTX_SUFF(pVM)->enmVMState == VMSTATE_GURU_MEDITATION_LS, \
+              ("Not emulation thread! Thread=%RTnthrd ThreadEMT=%RTnthrd idCpu=%#x\n", \
+               RTThreadNativeSelf(), (pVCpu)->hNativeThread, (pVCpu)->idCpu))
+#endif
+
+/** @def VMCPU_ASSERT_EMT_OR_NOT_RUNNING
+ * Asserts that the current thread IS the emulation thread (EMT) of the
+ * specified virtual CPU or the VM is not running.
+ */
+#if defined(IN_RC) || defined(IN_RING0)
+# define VMCPU_ASSERT_EMT_OR_NOT_RUNNING(pVCpu) \
+    Assert(    VMCPU_IS_EMT(pVCpu) \
+           || !VM_IS_RUNNING_FOR_ASSERTIONS_ONLY((pVCpu)->CTX_SUFF(pVM)) )
+#else
+# define VMCPU_ASSERT_EMT_OR_NOT_RUNNING(pVCpu) \
+    AssertMsg(    VMCPU_IS_EMT(pVCpu) \
+              || !VM_IS_RUNNING_FOR_ASSERTIONS_ONLY((pVCpu)->CTX_SUFF(pVM)), \
+              ("Not emulation thread! Thread=%RTnthrd ThreadEMT=%RTnthrd idCpu=%#x\n", \
+               RTThreadNativeSelf(), (pVCpu)->hNativeThread, (pVCpu)->idCpu))
+#endif
+
+/** @def VMSTATE_IS_RUNNING
+ * Checks if the given state indicates a running VM.
+ */
+#define VMSTATE_IS_RUNNING(a_enmVMState) \
+    (   (enmVMState) == VMSTATE_RUNNING \
+     || (enmVMState) == VMSTATE_RUNNING_LS )
+
+/** @def VM_IS_RUNNING_FOR_ASSERTIONS_ONLY
+ * Checks if the VM is running.
+ * @note This is only for pure debug assertions.  No AssertReturn or similar!
+ * @sa  VMSTATE_IS_RUNNING
+ */
+#define VM_IS_RUNNING_FOR_ASSERTIONS_ONLY(pVM) \
+    (   (pVM)->enmVMState == VMSTATE_RUNNING \
+     || (pVM)->enmVMState == VMSTATE_RUNNING_LS )
+
+/** @def VM_ASSERT_IS_NOT_RUNNING
+ * Asserts that the VM is not running.
+ */
+#if defined(IN_RC) || defined(IN_RING0)
+#define VM_ASSERT_IS_NOT_RUNNING(pVM)       Assert(!VM_IS_RUNNING_FOR_ASSERTIONS_ONLY(pVM))
+#else
+#define VM_ASSERT_IS_NOT_RUNNING(pVM)       AssertMsg(!VM_IS_RUNNING_FOR_ASSERTIONS_ONLY(pVM), \
+                                                      ("VM is running. enmVMState=%d\n", (pVM)->enmVMState))
+#endif
+
+/** @def VM_ASSERT_EMT0
+ * Asserts that the current thread IS emulation thread \#0 (EMT0).
+ */
+#ifdef IN_RING3
+# define VM_ASSERT_EMT0(a_pVM)              VMCPU_ASSERT_EMT((a_pVM)->apCpusR3[0])
+#else
+# define VM_ASSERT_EMT0(a_pVM)              VMCPU_ASSERT_EMT(&(a_pVM)->aCpus[0])
+#endif
+
+/** @def VM_ASSERT_EMT0_RETURN
+ * Asserts that the current thread IS emulation thread \#0 (EMT0) and returns if
+ * it isn't.
+ */
+#ifdef IN_RING3
+# define VM_ASSERT_EMT0_RETURN(pVM, rc)     VMCPU_ASSERT_EMT_RETURN((pVM)->apCpusR3[0], (rc))
+#else
+# define VM_ASSERT_EMT0_RETURN(pVM, rc)     VMCPU_ASSERT_EMT_RETURN(&(pVM)->aCpus[0], (rc))
+#endif
+
+
+/**
+ * Asserts that the current thread is NOT the emulation thread.
+ */
+#define VM_ASSERT_OTHER_THREAD(pVM) \
+    AssertMsg(!VM_IS_EMT(pVM), ("Not other thread!!\n"))
+
+
+/** @def VM_ASSERT_STATE
+ * Asserts a certain VM state.
+ */
+#define VM_ASSERT_STATE(pVM, _enmState) \
+        AssertMsg((pVM)->enmVMState == (_enmState), \
+                  ("state %s, expected %s\n", VMGetStateName((pVM)->enmVMState), VMGetStateName(_enmState)))
+
+/** @def VM_ASSERT_STATE_RETURN
+ * Asserts a certain VM state and returns if it doesn't match.
+ */
+#define VM_ASSERT_STATE_RETURN(pVM, _enmState, rc) \
+        AssertMsgReturn((pVM)->enmVMState == (_enmState), \
+                        ("state %s, expected %s\n", VMGetStateName((pVM)->enmVMState), VMGetStateName(_enmState)), \
+                        (rc))
+
+/** @def VM_IS_VALID_EXT
+ * Asserts a the VM handle is valid for external access, i.e. not being destroy
+ * or terminated. */
+#define VM_IS_VALID_EXT(pVM) \
+        (    RT_VALID_ALIGNED_PTR(pVM, PAGE_SIZE) \
+         &&  (   (unsigned)(pVM)->enmVMState < (unsigned)VMSTATE_DESTROYING \
+              || (   (unsigned)(pVM)->enmVMState == (unsigned)VMSTATE_DESTROYING \
+                  && VM_IS_EMT(pVM))) )
+
+/** @def VM_ASSERT_VALID_EXT_RETURN
+ * Asserts a the VM handle is valid for external access, i.e. not being
+ * destroy or terminated.
+ */
+#define VM_ASSERT_VALID_EXT_RETURN(pVM, rc) \
+        AssertMsgReturn(VM_IS_VALID_EXT(pVM), \
+                        ("pVM=%p state %s\n", (pVM), RT_VALID_ALIGNED_PTR(pVM, PAGE_SIZE) \
+                         ? VMGetStateName(pVM->enmVMState) : ""), \
+                        (rc))
+
+/** @def VMCPU_ASSERT_VALID_EXT_RETURN
+ * Asserts a the VMCPU handle is valid for external access, i.e. not being
+ * destroy or terminated.
+ */
+#define VMCPU_ASSERT_VALID_EXT_RETURN(pVCpu, rc) \
+        AssertMsgReturn(    RT_VALID_ALIGNED_PTR(pVCpu, 64) \
+                        &&  RT_VALID_ALIGNED_PTR((pVCpu)->CTX_SUFF(pVM), PAGE_SIZE) \
+                        &&  (unsigned)(pVCpu)->CTX_SUFF(pVM)->enmVMState < (unsigned)VMSTATE_DESTROYING, \
+                        ("pVCpu=%p pVM=%p state %s\n", (pVCpu), RT_VALID_ALIGNED_PTR(pVCpu, 64) ? (pVCpu)->CTX_SUFF(pVM) : NULL, \
+                         RT_VALID_ALIGNED_PTR(pVCpu, 64) && RT_VALID_ALIGNED_PTR((pVCpu)->CTX_SUFF(pVM), PAGE_SIZE) \
+                         ? VMGetStateName((pVCpu)->pVMR3->enmVMState) : ""), \
+                        (rc))
+
+#endif /* !VBOX_FOR_DTRACE_LIB */
+
+
+/**
+ * Helper that HM and NEM uses for safely modifying VM::bMainExecutionEngine.
+ *
+ * ONLY HM and NEM MAY USE THIS!
+ *
+ * @param   a_pVM       The cross context VM structure.
+ * @param   a_bValue    The new value.
+ * @internal
+ */
+#define VM_SET_MAIN_EXECUTION_ENGINE(a_pVM, a_bValue) \
+    do { \
+        *const_cast<uint8_t *>(&(a_pVM)->bMainExecutionEngine) = (a_bValue); \
+        ASMCompilerBarrier(); /* just to be on the safe side */ \
+    } while (0)
+
+/**
+ * Checks whether raw-mode is used.
+ *
+ * @retval  true if either is used.
+ * @retval  false if software virtualization (raw-mode) is used.
+ *
+ * @param   a_pVM       The cross context VM structure.
+ * @sa      VM_IS_HM_OR_NEM_ENABLED, VM_IS_HM_ENABLED, VM_IS_NEM_ENABLED.
+ * @internal
+ */
+#ifdef VBOX_WITH_RAW_MODE
+# define VM_IS_RAW_MODE_ENABLED(a_pVM)      ((a_pVM)->bMainExecutionEngine == VM_EXEC_ENGINE_RAW_MODE)
+#else
+# define VM_IS_RAW_MODE_ENABLED(a_pVM)      (false)
+#endif
+
+/**
+ * Checks whether HM (VT-x/AMD-V) or NEM is being used by this VM.
+ *
+ * @retval  true if either is used.
+ * @retval  false if software virtualization (raw-mode) is used.
+ *
+ * @param   a_pVM       The cross context VM structure.
+ * @sa      VM_IS_RAW_MODE_ENABLED, VM_IS_HM_ENABLED, VM_IS_NEM_ENABLED.
+ * @internal
+ */
+#define VM_IS_HM_OR_NEM_ENABLED(a_pVM)      ((a_pVM)->bMainExecutionEngine != VM_EXEC_ENGINE_RAW_MODE)
+
+/**
+ * Checks whether HM is being used by this VM.
+ *
+ * @retval  true if HM (VT-x/AMD-v) is used.
+ * @retval  false if not.
+ *
+ * @param   a_pVM       The cross context VM structure.
+ * @sa      VM_IS_NEM_ENABLED, VM_IS_RAW_MODE_ENABLED, VM_IS_HM_OR_NEM_ENABLED.
+ * @internal
+ */
+#define VM_IS_HM_ENABLED(a_pVM)             ((a_pVM)->bMainExecutionEngine == VM_EXEC_ENGINE_HW_VIRT)
+
+/**
+ * Checks whether NEM is being used by this VM.
+ *
+ * @retval  true if a native hypervisor API is used.
+ * @retval  false if not.
+ *
+ * @param   a_pVM       The cross context VM structure.
+ * @sa      VM_IS_HM_ENABLED, VM_IS_RAW_MODE_ENABLED, VM_IS_HM_OR_NEM_ENABLED.
+ * @internal
+ */
+#define VM_IS_NEM_ENABLED(a_pVM)             ((a_pVM)->bMainExecutionEngine == VM_EXEC_ENGINE_NATIVE_API)
+
+
+/**
+ * The cross context VM structure.
+ *
+ * It contains all the VM data which have to be available in all contexts.
+ * Even if it contains all the data the idea is to use APIs not to modify all
+ * the members all around the place.  Therefore we make use of unions to hide
+ * everything which isn't local to the current source module.  This means we'll
+ * have to pay a little bit of attention when adding new members to structures
+ * in the unions and make sure to keep the padding sizes up to date.
+ *
+ * Run 'kmk run-struct-tests' (from src/VBox/VMM if you like) after updating!
+ */
+typedef struct VM
+{
+    /** The state of the VM.
+     * This field is read only to everyone except the VM and EM. */
+    VMSTATE volatile            enmVMState;
+    /** Forced action flags.
+     * See the VM_FF_* \#defines. Updated atomically.
+     */
+    volatile uint32_t           fGlobalForcedActions;
+    /** Pointer to the array of page descriptors for the VM structure allocation. */
+    R3PTRTYPE(PSUPPAGE)         paVMPagesR3;
+    /** Session handle. For use when calling SUPR0 APIs. */
+#ifdef IN_RING0
+    PSUPDRVSESSION              pSessionUnsafe;
+#else
+    PSUPDRVSESSION              pSession;
+#endif
+    /** Pointer to the ring-3 VM structure. */
+    PUVM                        pUVM;
+    /** Ring-3 Host Context VM Pointer. */
+#ifdef IN_RING0
+    R3PTRTYPE(struct VM *)      pVMR3Unsafe;
+#else
+    R3PTRTYPE(struct VM *)      pVMR3;
+#endif
+    /** Ring-0 Host Context VM pointer for making ring-0 calls. */
+    R0PTRTYPE(struct VM *)      pVMR0ForCall;
+    /** Raw-mode Context VM Pointer. */
+    uint32_t                    pVMRC;
+    /** Padding for new raw-mode (long mode).   */
+    uint32_t                    pVMRCPadding;
+
+    /** The GVM VM handle. Only the GVM should modify this field. */
+#ifdef IN_RING0
+    uint32_t                    hSelfUnsafe;
+#else
+    uint32_t                    hSelf;
+#endif
+    /** Number of virtual CPUs. */
+#ifdef IN_RING0
+    uint32_t                    cCpusUnsafe;
+#else
+    uint32_t                    cCpus;
+#endif
+    /** CPU excution cap (1-100) */
+    uint32_t                    uCpuExecutionCap;
+
+    /** Size of the VM structure. */
+    uint32_t                    cbSelf;
+    /** Size of the VMCPU structure. */
+    uint32_t                    cbVCpu;
+    /** Structure version number (TBD). */
+    uint32_t                    uStructVersion;
+
+    /** @name Various items that are frequently accessed.
+     * @{ */
+    /** The main execution engine, VM_EXEC_ENGINE_XXX.
+     * This is set early during vmR3InitRing3 by HM or NEM.  */
+    uint8_t const               bMainExecutionEngine;
+
+    /** Hardware VM support is available and enabled.
+     * Determined very early during init.
+     * This is placed here for performance reasons.
+     * @todo obsoleted by bMainExecutionEngine, eliminate. */
+    bool                        fHMEnabled;
+
+    /** Large page enabled flag.
+     * @todo This doesn't need to be here, PGM should store it in it's own
+     *       structures instead. */
+    bool                        fUseLargePages;
+    /** @} */
+
+    /** Alignment padding. */
+    uint8_t                     uPadding1[5];
+
+    /** @name Debugging
+     * @{ */
+    /** Ring-3 Host Context VM Pointer. */
+    R3PTRTYPE(RTTRACEBUF)       hTraceBufR3;
+    /** Ring-0 Host Context VM Pointer. */
+    R0PTRTYPE(RTTRACEBUF)       hTraceBufR0;
+    /** @} */
+
+    /** Padding - the unions must be aligned on a 64 bytes boundary. */
+    uint8_t                     abAlignment3[HC_ARCH_BITS == 64 ? 24 : 52];
+
+    /** CPUM part. */
+    union
+    {
+#ifdef VMM_INCLUDED_SRC_include_CPUMInternal_h
+        struct CPUM s;
+#endif
+#ifdef VBOX_INCLUDED_vmm_cpum_h
+        /** Read only info exposed about the host and guest CPUs. */
+        struct
+        {
+            /** Padding for hidden fields. */
+            uint8_t                 abHidden0[64];
+            /** Host CPU feature information. */
+            CPUMFEATURES            HostFeatures;
+            /** Guest CPU feature information. */
+            CPUMFEATURES            GuestFeatures;
+        } const ro;
+#endif
+        uint8_t     padding[1536];      /* multiple of 64 */
+    } cpum;
+
+    /** VMM part. */
+    union
+    {
+#ifdef VMM_INCLUDED_SRC_include_VMMInternal_h
+        struct VMM  s;
+#endif
+        uint8_t     padding[1600];      /* multiple of 64 */
+    } vmm;
+
+    /** PGM part. */
+    union
+    {
+#ifdef VMM_INCLUDED_SRC_include_PGMInternal_h
+        struct PGM  s;
+#endif
+        uint8_t     padding[21120];      /* multiple of 64 */
+    } pgm;
+
+    /** HM part. */
+    union
+    {
+#ifdef VMM_INCLUDED_SRC_include_HMInternal_h
+        struct HM s;
+#endif
+        uint8_t     padding[5504];      /* multiple of 64 */
+    } hm;
+
+    /** TRPM part. */
+    union
+    {
+#ifdef VMM_INCLUDED_SRC_include_TRPMInternal_h
+        struct TRPM s;
+#endif
+        uint8_t     padding[5248];      /* multiple of 64 */
+    } trpm;
+
+    /** SELM part. */
+    union
+    {
+#ifdef VMM_INCLUDED_SRC_include_SELMInternal_h
+        struct SELM s;
+#endif
+        uint8_t     padding[768];       /* multiple of 64 */
+    } selm;
+
+    /** MM part. */
+    union
+    {
+#ifdef VMM_INCLUDED_SRC_include_MMInternal_h
+        struct MM   s;
+#endif
+        uint8_t     padding[192];       /* multiple of 64 */
+    } mm;
+
+    /** PDM part. */
+    union
+    {
+#ifdef VMM_INCLUDED_SRC_include_PDMInternal_h
+        struct PDM s;
+#endif
+        uint8_t     padding[7808];      /* multiple of 64 */
+    } pdm;
+
+    /** IOM part. */
+    union
+    {
+#ifdef VMM_INCLUDED_SRC_include_IOMInternal_h
+        struct IOM s;
+#endif
+        uint8_t     padding[1152];      /* multiple of 64 */
+    } iom;
+
+    /** EM part. */
+    union
+    {
+#ifdef VMM_INCLUDED_SRC_include_EMInternal_h
+        struct EM   s;
+#endif
+        uint8_t     padding[256];       /* multiple of 64 */
+    } em;
+
+    /** NEM part. */
+    union
+    {
+#ifdef VMM_INCLUDED_SRC_include_NEMInternal_h
+        struct NEM  s;
+#endif
+        uint8_t     padding[128];       /* multiple of 64 */
+    } nem;
+
+    /** TM part. */
+    union
+    {
+#ifdef VMM_INCLUDED_SRC_include_TMInternal_h
+        struct TM   s;
+#endif
+        uint8_t     padding[7872];      /* multiple of 64 */
+    } tm;
+
+    /** DBGF part. */
+    union
+    {
+#ifdef VMM_INCLUDED_SRC_include_DBGFInternal_h
+        struct DBGF s;
+#endif
+#ifdef VBOX_INCLUDED_vmm_dbgf_h
+        /** Read only info exposed about interrupt breakpoints and selected events. */
+        struct
+        {
+            /** Bitmap of enabled hardware interrupt breakpoints. */
+            uint32_t                    bmHardIntBreakpoints[256 / 32];
+            /** Bitmap of enabled software interrupt breakpoints. */
+            uint32_t                    bmSoftIntBreakpoints[256 / 32];
+            /** Bitmap of selected events.
+             * This includes non-selectable events too for simplicity, we maintain the
+             * state for some of these, as it may come in handy. */
+            uint64_t                    bmSelectedEvents[(DBGFEVENT_END + 63) / 64];
+            /** Enabled hardware interrupt breakpoints. */
+            uint32_t                    cHardIntBreakpoints;
+            /** Enabled software interrupt breakpoints. */
+            uint32_t                    cSoftIntBreakpoints;
+            /** The number of selected events. */
+            uint32_t                    cSelectedEvents;
+            /** The number of enabled hardware breakpoints. */
+            uint8_t                     cEnabledHwBreakpoints;
+            /** The number of enabled hardware I/O breakpoints. */
+            uint8_t                     cEnabledHwIoBreakpoints;
+            /** The number of enabled INT3 breakpoints. */
+            uint8_t                     cEnabledInt3Breakpoints;
+            uint8_t                     abPadding[1]; /**< Unused padding space up for grabs. */
+        } const     ro;
+#endif
+        uint8_t     padding[2432];      /* multiple of 64 */
+    } dbgf;
+
+    /** SSM part. */
+    union
+    {
+#ifdef VMM_INCLUDED_SRC_include_SSMInternal_h
+        struct SSM  s;
+#endif
+        uint8_t     padding[128];       /* multiple of 64 */
+    } ssm;
+
+    union
+    {
+#ifdef VMM_INCLUDED_SRC_include_GIMInternal_h
+        struct GIM s;
+#endif
+        uint8_t     padding[448];       /* multiple of 64 */
+    } gim;
+
+    union
+    {
+#ifdef VMM_INCLUDED_SRC_include_APICInternal_h
+        struct APIC s;
+#endif
+        uint8_t     padding[128];       /* multiple of 8 */
+    } apic;
+
+    /* ---- begin small stuff ---- */
+
+    /** VM part. */
+    union
+    {
+#ifdef VMM_INCLUDED_SRC_include_VMInternal_h
+        struct VMINT s;
+#endif
+        uint8_t     padding[32];        /* multiple of 8 */
+    } vm;
+
+    /** CFGM part. */
+    union
+    {
+#ifdef VMM_INCLUDED_SRC_include_CFGMInternal_h
+        struct CFGM s;
+#endif
+        uint8_t     padding[8];         /* multiple of 8 */
+    } cfgm;
+
+    /** Statistics for ring-0 only components. */
+    struct
+    {
+        /** GMMR0 stats. */
+        struct
+        {
+            /** Chunk TLB hits. */
+            uint64_t    cChunkTlbHits;
+            /** Chunk TLB misses. */
+            uint64_t    cChunkTlbMisses;
+        } gmm;
+        uint64_t    au64Padding[6];     /* probably more comming here... */
+    } R0Stats;
+
+    /** Padding for aligning the structure size on a page boundrary. */
+    uint8_t         abAlignment2[600 - 64 + 256 - sizeof(PVMCPUR3) * VMM_MAX_CPU_COUNT];
+
+    /* ---- end small stuff ---- */
+
+    /** Array of VMCPU ring-3 pointers. */
+    PVMCPUR3        apCpusR3[VMM_MAX_CPU_COUNT];
+} VM;
+
+
+#ifdef IN_RC
+RT_C_DECLS_BEGIN
+
+/** The VM structure.
+ * This is imported from the VMMRCBuiltin module, i.e. it's a one of those magic
+ * globals which we should avoid using.
+ */
+extern DECLIMPORT(VM)   g_VM;
+
+/** The VMCPU structure for virtual CPU \#0.
+ * This is imported from the VMMRCBuiltin module, i.e. it's a one of those magic
+ * globals which we should avoid using.
+ */
+extern DECLIMPORT(VMCPU) g_VCpu0;
+
+RT_C_DECLS_END
+#endif
+
+/** @} */
+
+#endif /* !VBOX_INCLUDED_vmm_vm_h */
+