path: root/include/VBox/vmm/vmm.h

/** @file
 * VMM - The Virtual Machine Monitor.
 */

/*
 * Copyright (C) 2006-2013 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_vmm_vmm_h
#define ___VBox_vmm_vmm_h

#include <VBox/types.h>
#include <VBox/vmm/vmapi.h>
#include <VBox/sup.h>
#include <VBox/log.h>
#include <iprt/stdarg.h>
#include <iprt/thread.h>

RT_C_DECLS_BEGIN

/** @defgroup grp_vmm       The Virtual Machine Monitor API
 * @{
 */

/**
 * World switcher identifiers.
 */
typedef enum VMMSWITCHER
{
    /** The usual invalid 0. */
    VMMSWITCHER_INVALID = 0,
    /** Switcher for 32-bit host to 32-bit shadow paging. */
    VMMSWITCHER_32_TO_32,
    /** Switcher for 32-bit host paging to PAE shadow paging. */
    VMMSWITCHER_32_TO_PAE,
    /** Switcher for 32-bit host paging to AMD64 shadow paging. */
    VMMSWITCHER_32_TO_AMD64,
    /** Switcher for PAE host to 32-bit shadow paging. */
    VMMSWITCHER_PAE_TO_32,
    /** Switcher for PAE host to PAE shadow paging. */
    VMMSWITCHER_PAE_TO_PAE,
    /** Switcher for PAE host paging to AMD64 shadow paging. */
    VMMSWITCHER_PAE_TO_AMD64,
    /** Switcher for AMD64 host paging to 32-bit shadow paging. */
    VMMSWITCHER_AMD64_TO_32,
    /** Switcher for AMD64 host paging to PAE shadow paging. */
    VMMSWITCHER_AMD64_TO_PAE,
    /** Switcher for AMD64 host paging to AMD64 shadow paging. */
    VMMSWITCHER_AMD64_TO_AMD64,
    /** Stub switcher for 32-bit and PAE. */
    VMMSWITCHER_X86_STUB,
    /** Stub switcher for AMD64. */
    VMMSWITCHER_AMD64_STUB,
    /** Used to make a count for array declarations and suchlike. */
    VMMSWITCHER_MAX,
    /** The usual 32-bit paranoia. */
    VMMSWITCHER_32BIT_HACK = 0x7fffffff
} VMMSWITCHER;


/**
 * VMMRZCallRing3 operations.
 */
typedef enum VMMCALLRING3
{
    /** Invalid operation.  */
    VMMCALLRING3_INVALID = 0,
    /** Acquire the PDM lock. */
    VMMCALLRING3_PDM_LOCK,
    /** Acquire the critical section specified as argument.  */
    VMMCALLRING3_PDM_CRIT_SECT_ENTER,
    /** Enter the R/W critical section (in argument) exclusively.  */
    VMMCALLRING3_PDM_CRIT_SECT_RW_ENTER_EXCL,
    /** Enter the R/W critical section (in argument) shared.  */
    VMMCALLRING3_PDM_CRIT_SECT_RW_ENTER_SHARED,
    /** Acquire the PGM lock. */
    VMMCALLRING3_PGM_LOCK,
    /** Grow the PGM shadow page pool. */
    VMMCALLRING3_PGM_POOL_GROW,
    /** Maps a chunk into ring-3. */
    VMMCALLRING3_PGM_MAP_CHUNK,
    /** Allocates more handy pages. */
    VMMCALLRING3_PGM_ALLOCATE_HANDY_PAGES,
    /** Allocates a large (2MB) page. */
    VMMCALLRING3_PGM_ALLOCATE_LARGE_HANDY_PAGE,
    /** Acquire the MM hypervisor heap lock. */
    VMMCALLRING3_MMHYPER_LOCK,
    /** Replay the REM handler notifications. */
    VMMCALLRING3_REM_REPLAY_HANDLER_NOTIFICATIONS,
    /** Flush the GC/R0 logger. */
    VMMCALLRING3_VMM_LOGGER_FLUSH,
    /** Set the VM error message. */
    VMMCALLRING3_VM_SET_ERROR,
    /** Set the VM runtime error message. */
    VMMCALLRING3_VM_SET_RUNTIME_ERROR,
    /** Signal a ring 0 assertion. */
    VMMCALLRING3_VM_R0_ASSERTION,
    /** Ring switch to force preemption.  This is also used by PDMCritSect to
     *  handle VERR_INTERRUPTED in kernel context. */
    VMMCALLRING3_VM_R0_PREEMPT,
    /** Sync the FTM state with the standby node. */
    VMMCALLRING3_FTM_SET_CHECKPOINT,
    /** The usual 32-bit hack. */
    VMMCALLRING3_32BIT_HACK = 0x7fffffff
} VMMCALLRING3;

/**
 * VMMRZCallRing3 notification callback.
 *
 * @returns VBox status code.
 * @param   pVCpu           Pointer to the VMCPU.
 * @param   enmOperation    The operation causing the ring-3 jump.
 * @param   pvUser          The user argument.
 */
typedef DECLCALLBACK(int) FNVMMR0CALLRING3NOTIFICATION(PVMCPU pVCpu, VMMCALLRING3 enmOperation, void *pvUser);
/** Pointer to a FNRTMPNOTIFICATION(). */
typedef FNVMMR0CALLRING3NOTIFICATION *PFNVMMR0CALLRING3NOTIFICATION;

/**
 * Rendezvous callback.
 *
 * @returns VBox strict status code - EM scheduling.  Do not return
 *          informational status code other than the ones used by EM for
 *          scheduling.
 *
 * @param   pVM         The VM handle.
 * @param   pVCpu       The handle of the calling virtual CPU.
 * @param   pvUser      The user argument.
 */
typedef DECLCALLBACK(VBOXSTRICTRC) FNVMMEMTRENDEZVOUS(PVM pVM, PVMCPU pVCpu, void *pvUser);
/** Pointer to a rendezvous callback function. */
typedef FNVMMEMTRENDEZVOUS *PFNVMMEMTRENDEZVOUS;

/**
 * Method table that the VMM uses to call back the user of the VMM.
 */
typedef struct VMM2USERMETHODS
{
    /** Magic value (VMM2USERMETHODS_MAGIC). */
    uint32_t    u32Magic;
    /** Structure version (VMM2USERMETHODS_VERSION). */
    uint32_t    u32Version;

    /**
     * Save the VM state.
     *
     * @returns VBox status code.
     * @param   pThis       Pointer to the callback method table.
     * @param   pUVM        The user mode VM handle.
     *
     * @remarks This member shall be set to NULL if the operation is not
     *          supported.
     */
    DECLR3CALLBACKMEMBER(int, pfnSaveState,(PCVMM2USERMETHODS pThis, PUVM pUVM));
    /** @todo Move pfnVMAtError and pfnCFGMConstructor here? */

    /**
     * EMT initialization notification callback.
     *
     * This is intended for doing per-thread initialization for EMTs (like COM
     * init).
     *
     * @param   pThis       Pointer to the callback method table.
     * @param   pUVM        The user mode VM handle.
     * @param   pUVCpu      The user mode virtual CPU handle.
     *
     * @remarks This is optional and shall be set to NULL if not wanted.
     */
    DECLR3CALLBACKMEMBER(void, pfnNotifyEmtInit,(PCVMM2USERMETHODS pThis, PUVM pUVM, PUVMCPU pUVCpu));

    /**
     * EMT termination notification callback.
     *
     * This is intended for doing per-thread cleanups for EMTs (like COM).
     *
     * @param   pThis       Pointer to the callback method table.
     * @param   pUVM        The user mode VM handle.
     * @param   pUVCpu      The user mode virtual CPU handle.
     *
     * @remarks This is optional and shall be set to NULL if not wanted.
     */
    DECLR3CALLBACKMEMBER(void, pfnNotifyEmtTerm,(PCVMM2USERMETHODS pThis, PUVM pUVM, PUVMCPU pUVCpu));

    /**
     * PDM thread initialization notification callback.
     *
     * This is intended for doing per-thread initialization (like COM init).
     *
     * @param   pThis       Pointer to the callback method table.
     * @param   pUVM        The user mode VM handle.
     *
     * @remarks This is optional and shall be set to NULL if not wanted.
     */
    DECLR3CALLBACKMEMBER(void, pfnNotifyPdmtInit,(PCVMM2USERMETHODS pThis, PUVM pUVM));

    /**
     * EMT termination notification callback.
     *
     * This is intended for doing per-thread cleanups for EMTs (like COM).
     *
     * @param   pThis       Pointer to the callback method table.
     * @param   pUVM        The user mode VM handle.
     *
     * @remarks This is optional and shall be set to NULL if not wanted.
     */
    DECLR3CALLBACKMEMBER(void, pfnNotifyPdmtTerm,(PCVMM2USERMETHODS pThis, PUVM pUVM));

    /**
     * Notification callback that that a VM reset will be turned into a power off.
     *
     * @param   pThis       Pointer to the callback method table.
     * @param   pUVM        The user mode VM handle.
     *
     * @remarks This is optional and shall be set to NULL if not wanted.
     */
    DECLR3CALLBACKMEMBER(void, pfnNotifyResetTurnedIntoPowerOff,(PCVMM2USERMETHODS pThis, PUVM pUVM));

    /** Magic value (VMM2USERMETHODS_MAGIC) marking the end of the structure. */
    uint32_t    u32EndMagic;
} VMM2USERMETHODS;

/** Magic value of the VMM2USERMETHODS (Franz Kafka). */
#define VMM2USERMETHODS_MAGIC         UINT32_C(0x18830703)
/** The VMM2USERMETHODS structure version. */
#define VMM2USERMETHODS_VERSION       UINT32_C(0x00020001)


/**
 * Checks whether we've armed the ring-0 long jump machinery.
 *
 * @returns @c true / @c false
 * @param   pVCpu           The caller's cross context virtual CPU structure.
 * @thread  EMT
 * @sa      VMMR0IsLongJumpArmed
 */
#ifdef IN_RING0
# define VMMIsLongJumpArmed(a_pVCpu)                VMMR0IsLongJumpArmed(a_pVCpu)
#else
# define VMMIsLongJumpArmed(a_pVCpu)                (false)
#endif


VMM_INT_DECL(RTRCPTR)       VMMGetStackRC(PVMCPU pVCpu);
VMMDECL(VMCPUID)            VMMGetCpuId(PVM pVM);
VMMDECL(PVMCPU)             VMMGetCpu(PVM pVM);
VMMDECL(PVMCPU)             VMMGetCpu0(PVM pVM);
VMMDECL(PVMCPU)             VMMGetCpuById(PVM pVM, VMCPUID idCpu);
VMMR3DECL(PVMCPU)           VMMR3GetCpuByIdU(PUVM pVM, VMCPUID idCpu);
VMM_INT_DECL(uint32_t)      VMMGetSvnRev(void);
VMM_INT_DECL(VMMSWITCHER)   VMMGetSwitcher(PVM pVM);
VMM_INT_DECL(bool)          VMMIsInRing3Call(PVMCPU pVCpu);
VMM_INT_DECL(void)          VMMTrashVolatileXMMRegs(void);


#ifdef IN_RING3
/** @defgroup grp_vmm_r3    The VMM Host Context Ring 3 API
 * @ingroup grp_vmm
 * @{
 */
VMMR3_INT_DECL(int)     VMMR3Init(PVM pVM);
VMMR3_INT_DECL(int)     VMMR3InitR0(PVM pVM);
# ifdef VBOX_WITH_RAW_MODE
VMMR3_INT_DECL(int)     VMMR3InitRC(PVM pVM);
# endif
VMMR3_INT_DECL(int)     VMMR3InitCompleted(PVM pVM, VMINITCOMPLETED enmWhat);
VMMR3_INT_DECL(int)     VMMR3Term(PVM pVM);
VMMR3_INT_DECL(void)    VMMR3Relocate(PVM pVM, RTGCINTPTR offDelta);
VMMR3_INT_DECL(int)     VMMR3UpdateLoggers(PVM pVM);
VMMR3DECL(const char *) VMMR3GetRZAssertMsg1(PVM pVM);
VMMR3DECL(const char *) VMMR3GetRZAssertMsg2(PVM pVM);
VMMR3_INT_DECL(int)     VMMR3SelectSwitcher(PVM pVM, VMMSWITCHER enmSwitcher);
VMMR3_INT_DECL(RTR0PTR) VMMR3GetHostToGuestSwitcher(PVM pVM, VMMSWITCHER enmSwitcher);
VMMR3_INT_DECL(int)     VMMR3HmRunGC(PVM pVM, PVMCPU pVCpu);
# ifdef VBOX_WITH_RAW_MODE
VMMR3_INT_DECL(int)     VMMR3RawRunGC(PVM pVM, PVMCPU pVCpu);
VMMR3DECL(int)          VMMR3ResumeHyper(PVM pVM, PVMCPU pVCpu);
VMMR3_INT_DECL(int)     VMMR3GetImportRC(PVM pVM, const char *pszSymbol, PRTRCPTR pRCPtrValue);
VMMR3DECL(int)          VMMR3CallRC(PVM pVM, RTRCPTR RCPtrEntry, unsigned cArgs, ...);
VMMR3DECL(int)          VMMR3CallRCV(PVM pVM, RTRCPTR RCPtrEntry, unsigned cArgs, va_list args);
# endif
VMMR3DECL(int)          VMMR3CallR0(PVM pVM, uint32_t uOperation, uint64_t u64Arg, PSUPVMMR0REQHDR pReqHdr);
VMMR3DECL(void)         VMMR3FatalDump(PVM pVM, PVMCPU pVCpu, int rcErr);
VMMR3_INT_DECL(void)    VMMR3YieldSuspend(PVM pVM);
VMMR3_INT_DECL(void)    VMMR3YieldStop(PVM pVM);
VMMR3_INT_DECL(void)    VMMR3YieldResume(PVM pVM);
VMMR3_INT_DECL(void)    VMMR3SendSipi(PVM pVM, VMCPUID idCpu, uint32_t uVector);
VMMR3_INT_DECL(void)    VMMR3SendInitIpi(PVM pVM, VMCPUID idCpu);
VMMR3DECL(int)          VMMR3RegisterPatchMemory(PVM pVM, RTGCPTR pPatchMem, unsigned cbPatchMem);
VMMR3DECL(int)          VMMR3DeregisterPatchMemory(PVM pVM, RTGCPTR pPatchMem, unsigned cbPatchMem);
VMMR3DECL(int)          VMMR3EmtRendezvous(PVM pVM, uint32_t fFlags, PFNVMMEMTRENDEZVOUS pfnRendezvous, void *pvUser);
VMMR3_INT_DECL(bool)    VMMR3EmtRendezvousSetDisabled(PVMCPU pVCpu, bool fDisabled);
/** @defgroup grp_VMMR3EmtRendezvous_fFlags     VMMR3EmtRendezvous flags
 *  @{ */
/** Execution type mask. */
#define VMMEMTRENDEZVOUS_FLAGS_TYPE_MASK            UINT32_C(0x00000007)
/** Invalid execution type. */
#define VMMEMTRENDEZVOUS_FLAGS_TYPE_INVALID         UINT32_C(0)
/** Let the EMTs execute the callback one by one (in no particular order). */
#define VMMEMTRENDEZVOUS_FLAGS_TYPE_ONE_BY_ONE      UINT32_C(1)
/** Let all the EMTs execute the callback at the same time. */
#define VMMEMTRENDEZVOUS_FLAGS_TYPE_ALL_AT_ONCE     UINT32_C(2)
/** Only execute the callback on one EMT (no particular one). */
#define VMMEMTRENDEZVOUS_FLAGS_TYPE_ONCE            UINT32_C(3)
/** Let the EMTs execute the callback one by one in ascending order. */
#define VMMEMTRENDEZVOUS_FLAGS_TYPE_ASCENDING       UINT32_C(4)
/** Let the EMTs execute the callback one by one in descending order. */
#define VMMEMTRENDEZVOUS_FLAGS_TYPE_DESCENDING      UINT32_C(5)
/** Stop after the first error.
 * This is not valid for any execution type where more than one EMT is active
 * at a time. */
#define VMMEMTRENDEZVOUS_FLAGS_STOP_ON_ERROR        UINT32_C(0x00000008)
/** The valid flags. */
#define VMMEMTRENDEZVOUS_FLAGS_VALID_MASK           UINT32_C(0x0000000f)
/** @} */
VMMR3_INT_DECL(int)     VMMR3EmtRendezvousFF(PVM pVM, PVMCPU pVCpu);
VMMR3_INT_DECL(int)     VMMR3ReadR0Stack(PVM pVM, VMCPUID idCpu, RTHCUINTPTR R0Addr, void *pvBuf, size_t cbRead);
/** @} */
#endif /* IN_RING3 */


/** @defgroup grp_vmm_r0    The VMM Host Context Ring 0 API
 * @ingroup grp_vmm
 * @{
 */

/**
 * The VMMR0Entry() codes.
 */
typedef enum VMMR0OPERATION
{
    /** Run guest context. */
    VMMR0_DO_RAW_RUN = SUP_VMMR0_DO_RAW_RUN,
    /** Run guest code using the available hardware acceleration technology. */
    VMMR0_DO_HM_RUN = SUP_VMMR0_DO_HM_RUN,
    /** Official NOP that we use for profiling. */
    VMMR0_DO_NOP = SUP_VMMR0_DO_NOP,
    /** Official slow iocl NOP that we use for profiling. */
    VMMR0_DO_SLOW_NOP,

    /** Ask the GVMM to create a new VM. */
    VMMR0_DO_GVMM_CREATE_VM,
    /** Ask the GVMM to destroy the VM. */
    VMMR0_DO_GVMM_DESTROY_VM,
    /** Call GVMMR0SchedHalt(). */
    VMMR0_DO_GVMM_SCHED_HALT,
    /** Call GVMMR0SchedWakeUp(). */
    VMMR0_DO_GVMM_SCHED_WAKE_UP,
    /** Call GVMMR0SchedPoke(). */
    VMMR0_DO_GVMM_SCHED_POKE,
    /** Call GVMMR0SchedWakeUpAndPokeCpus(). */
    VMMR0_DO_GVMM_SCHED_WAKE_UP_AND_POKE_CPUS,
    /** Call GVMMR0SchedPoll(). */
    VMMR0_DO_GVMM_SCHED_POLL,
    /** Call GVMMR0QueryStatistics(). */
    VMMR0_DO_GVMM_QUERY_STATISTICS,
    /** Call GVMMR0ResetStatistics(). */
    VMMR0_DO_GVMM_RESET_STATISTICS,
    /** Call GVMMR0RegisterVCpu(). */
    VMMR0_DO_GVMM_REGISTER_VMCPU,

    /** Call VMMR0 Per VM Init. */
    VMMR0_DO_VMMR0_INIT,
    /** Call VMMR0 Per VM Termination. */
    VMMR0_DO_VMMR0_TERM,
    /** Setup the hardware accelerated raw-mode session. */
    VMMR0_DO_HM_SETUP_VM,
    /** Attempt to enable or disable hardware accelerated raw-mode. */
    VMMR0_DO_HM_ENABLE,
    /** Calls function in the hypervisor.
     * The caller must setup the hypervisor context so the call will be performed.
     * The difference between VMMR0_DO_RUN_GC and this one is the handling of
     * the return GC code. The return code will not be interpreted by this operation.
     */
    VMMR0_DO_CALL_HYPERVISOR,

    /** Call PGMR0PhysAllocateHandyPages(). */
    VMMR0_DO_PGM_ALLOCATE_HANDY_PAGES,
    /** Call PGMR0PhysFlushHandyPages(). */
    VMMR0_DO_PGM_FLUSH_HANDY_PAGES,
    /** Call PGMR0AllocateLargePage(). */
    VMMR0_DO_PGM_ALLOCATE_LARGE_HANDY_PAGE,
    /** Call PGMR0PhysSetupIommu(). */
    VMMR0_DO_PGM_PHYS_SETUP_IOMMU,

    /** Call GMMR0InitialReservation(). */
    VMMR0_DO_GMM_INITIAL_RESERVATION,
    /** Call GMMR0UpdateReservation(). */
    VMMR0_DO_GMM_UPDATE_RESERVATION,
    /** Call GMMR0AllocatePages(). */
    VMMR0_DO_GMM_ALLOCATE_PAGES,
    /** Call GMMR0FreePages(). */
    VMMR0_DO_GMM_FREE_PAGES,
    /** Call GMMR0FreeLargePage(). */
    VMMR0_DO_GMM_FREE_LARGE_PAGE,
    /** Call GMMR0QueryHypervisorMemoryStatsReq(). */
    VMMR0_DO_GMM_QUERY_HYPERVISOR_MEM_STATS,
    /** Call GMMR0QueryMemoryStatsReq(). */
    VMMR0_DO_GMM_QUERY_MEM_STATS,
    /** Call GMMR0BalloonedPages(). */
    VMMR0_DO_GMM_BALLOONED_PAGES,
    /** Call GMMR0MapUnmapChunk(). */
    VMMR0_DO_GMM_MAP_UNMAP_CHUNK,
    /** Call GMMR0SeedChunk(). */
    VMMR0_DO_GMM_SEED_CHUNK,
    /** Call GMMR0RegisterSharedModule. */
    VMMR0_DO_GMM_REGISTER_SHARED_MODULE,
    /** Call GMMR0UnregisterSharedModule. */
    VMMR0_DO_GMM_UNREGISTER_SHARED_MODULE,
    /** Call GMMR0ResetSharedModules. */
    VMMR0_DO_GMM_RESET_SHARED_MODULES,
    /** Call GMMR0CheckSharedModules. */
    VMMR0_DO_GMM_CHECK_SHARED_MODULES,
    /** Call GMMR0FindDuplicatePage. */
    VMMR0_DO_GMM_FIND_DUPLICATE_PAGE,
    /** Call GMMR0QueryStatistics(). */
    VMMR0_DO_GMM_QUERY_STATISTICS,
    /** Call GMMR0ResetStatistics(). */
    VMMR0_DO_GMM_RESET_STATISTICS,

    /** Set a GVMM or GMM configuration value. */
    VMMR0_DO_GCFGM_SET_VALUE,
    /** Query a GVMM or GMM configuration value. */
    VMMR0_DO_GCFGM_QUERY_VALUE,

    /** Call PDMR0DriverCallReqHandler. */
    VMMR0_DO_PDM_DRIVER_CALL_REQ_HANDLER,
    /** Call PDMR0DeviceCallReqHandler. */
    VMMR0_DO_PDM_DEVICE_CALL_REQ_HANDLER,

    /** The start of the R0 service operations. */
    VMMR0_DO_SRV_START,
    /** Call IntNetR0Open(). */
    VMMR0_DO_INTNET_OPEN,
    /** Call IntNetR0IfClose(). */
    VMMR0_DO_INTNET_IF_CLOSE,
    /** Call IntNetR0IfGetBufferPtrs(). */
    VMMR0_DO_INTNET_IF_GET_BUFFER_PTRS,
    /** Call IntNetR0IfSetPromiscuousMode(). */
    VMMR0_DO_INTNET_IF_SET_PROMISCUOUS_MODE,
    /** Call IntNetR0IfSetMacAddress(). */
    VMMR0_DO_INTNET_IF_SET_MAC_ADDRESS,
    /** Call IntNetR0IfSetActive(). */
    VMMR0_DO_INTNET_IF_SET_ACTIVE,
    /** Call IntNetR0IfSend(). */
    VMMR0_DO_INTNET_IF_SEND,
    /** Call IntNetR0IfWait(). */
    VMMR0_DO_INTNET_IF_WAIT,
    /** Call IntNetR0IfAbortWait(). */
    VMMR0_DO_INTNET_IF_ABORT_WAIT,

    /** Forward call to the PCI driver */
    VMMR0_DO_PCIRAW_REQ,

    /** The end of the R0 service operations. */
    VMMR0_DO_SRV_END,

    /** Official call we use for testing Ring-0 APIs. */
    VMMR0_DO_TESTS,
    /** Test the 32->64 bits switcher. */
    VMMR0_DO_TEST_SWITCHER3264,

    /** The usual 32-bit type blow up. */
    VMMR0_DO_32BIT_HACK = 0x7fffffff
} VMMR0OPERATION;


/**
 * Request buffer for VMMR0_DO_GCFGM_SET_VALUE and VMMR0_DO_GCFGM_QUERY_VALUE.
 * @todo Move got GCFGM.h when it's implemented.
 */
typedef struct GCFGMVALUEREQ
{
    /** The request header.*/
    SUPVMMR0REQHDR      Hdr;
    /** The support driver session handle. */
    PSUPDRVSESSION      pSession;
    /** The value.
     * This is input for the set request and output for the query. */
    uint64_t            u64Value;
    /** The variable name.
     * This is fixed sized just to make things simple for the mock-up. */
    char                szName[48];
} GCFGMVALUEREQ;
/** Pointer to a VMMR0_DO_GCFGM_SET_VALUE and VMMR0_DO_GCFGM_QUERY_VALUE request buffer.
 * @todo Move got GCFGM.h when it's implemented.
 */
typedef GCFGMVALUEREQ *PGCFGMVALUEREQ;

#ifdef IN_RING0
VMMR0DECL(int)       VMMR0EntryInt(PVM pVM, VMMR0OPERATION enmOperation, void *pvArg);
VMMR0DECL(void)      VMMR0EntryFast(PVM pVM, VMCPUID idCpu, VMMR0OPERATION enmOperation);
VMMR0DECL(int)       VMMR0EntryEx(PVM pVM, VMCPUID idCpu, VMMR0OPERATION enmOperation, PSUPVMMR0REQHDR pReq, uint64_t u64Arg, PSUPDRVSESSION);
VMMR0DECL(int)       VMMR0TermVM(PVM pVM, PGVM pGVM);
VMMR0_INT_DECL(bool) VMMR0IsLongJumpArmed(PVMCPU pVCpu);
VMMR0_INT_DECL(bool) VMMR0IsInRing3LongJump(PVMCPU pVCpu);
VMMR0DECL(int)       VMMR0ThreadCtxHooksCreate(PVMCPU pVCpu);
VMMR0DECL(void)      VMMR0ThreadCtxHooksRelease(PVMCPU pVCpu);
VMMR0DECL(bool)      VMMR0ThreadCtxHooksAreCreated(PVMCPU pVCpu);
VMMR0DECL(int)       VMMR0ThreadCtxHooksRegister(PVMCPU pVCpu, PFNRTTHREADCTXHOOK pfnHook);
VMMR0DECL(int)       VMMR0ThreadCtxHooksDeregister(PVMCPU pVCpu);
VMMR0DECL(bool)      VMMR0ThreadCtxHooksAreRegistered(PVMCPU pVCpu);

# ifdef LOG_ENABLED
VMMR0DECL(void)      VMMR0LogFlushDisable(PVMCPU pVCpu);
VMMR0DECL(void)      VMMR0LogFlushEnable(PVMCPU pVCpu);
VMMR0DECL(bool)      VMMR0IsLogFlushDisabled(PVMCPU pVCpu);
# else
#  define            VMMR0LogFlushDisable(pVCpu)     do { } while(0)
#  define            VMMR0LogFlushEnable(pVCpu)      do { } while(0)
#  define            VMMR0IsLogFlushDisabled(pVCpu)  (true)
# endif /* LOG_ENABLED */
#endif /* IN_RING0 */

/** @} */


#ifdef IN_RC
/** @defgroup grp_vmm_rc    The VMM Raw-Mode Context API
 * @ingroup grp_vmm
 * @{
 */
VMMRCDECL(int)      VMMGCEntry(PVM pVM, unsigned uOperation, unsigned uArg, ...);
VMMRCDECL(void)     VMMGCGuestToHost(PVM pVM, int rc);
VMMRCDECL(void)     VMMGCLogFlushIfFull(PVM pVM);
/** @} */
#endif /* IN_RC */

#if defined(IN_RC) || defined(IN_RING0)
/** @defgroup grp_vmm_rz    The VMM Raw-Mode and Ring-0 Context API
 * @ingroup grp_vmm
 * @{
 */
VMMRZDECL(int)      VMMRZCallRing3(PVM pVM, PVMCPU pVCpu, VMMCALLRING3 enmOperation, uint64_t uArg);
VMMRZDECL(int)      VMMRZCallRing3NoCpu(PVM pVM, VMMCALLRING3 enmOperation, uint64_t uArg);
VMMRZDECL(void)     VMMRZCallRing3Disable(PVMCPU pVCpu);
VMMRZDECL(void)     VMMRZCallRing3Enable(PVMCPU pVCpu);
VMMRZDECL(bool)     VMMRZCallRing3IsEnabled(PVMCPU pVCpu);
VMMRZDECL(int)      VMMRZCallRing3SetNotification(PVMCPU pVCpu, R0PTRTYPE(PFNVMMR0CALLRING3NOTIFICATION) pfnCallback, RTR0PTR pvUser);
VMMRZDECL(void)     VMMRZCallRing3RemoveNotification(PVMCPU pVCpu);
VMMRZDECL(bool)     VMMRZCallRing3IsNotificationSet(PVMCPU pVCpu);
/** @} */
#endif


/** @} */
RT_C_DECLS_END

#endif