common/time/timesupref.cpp

	timesupref.cpp revision dea2c017e104e2e58947563bc94422d02477f611
/* $Id$ */
/** @file
 * IPRT - Time using SUPLib, the C Implementation.
 */

/*
 * Copyright (C) 2006-2015 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.
 */

#if !defined(IN_GUEST) && !defined(RT_NO_GIP)

/*******************************************************************************
*   Header Files                                                               *
*******************************************************************************/
#include <iprt/time.h>
#include "internal/iprt.h"

#include <iprt/asm.h>
#include <iprt/asm-math.h>
#include <iprt/asm-amd64-x86.h>
#include <VBox/sup.h>
#ifdef IN_RC
# include <VBox/vmm/vmm.h>
# include <VBox/vmm/vm.h>
#endif
#include "internal/time.h"


#define TMPL_MODE_SYNC_INVAR_NO_DELTA       1
#define TMPL_MODE_SYNC_INVAR_WITH_DELTA     2
#define TMPL_MODE_ASYNC                     3


/*
 * Use the XCHG instruction for some kind of serialization.
 */
#define TMPL_READ_FENCE()        ASMReadFence()

#undef  TMPL_MODE
#define TMPL_MODE                TMPL_MODE_SYNC_INVAR_NO_DELTA
#undef  TMPL_GET_CPU_METHOD
#define TMPL_GET_CPU_METHOD      0
#undef  rtTimeNanoTSInternalRef
#define rtTimeNanoTSInternalRef  RTTimeNanoTSLegacySyncInvarNoDelta
#include "timesupref.h"
RT_EXPORT_SYMBOL(RTTimeNanoTSLegacySyncInvarNoDelta);

#ifdef IN_RING3

# undef  TMPL_MODE
# define TMPL_MODE               TMPL_MODE_SYNC_INVAR_WITH_DELTA
# undef  TMPL_GET_CPU_METHOD
# define TMPL_GET_CPU_METHOD     SUPGIPGETCPU_APIC_ID
# undef  rtTimeNanoTSInternalRef
# define rtTimeNanoTSInternalRef RTTimeNanoTSLegacySyncInvarWithDeltaUseApicId
# include "timesupref.h"
RT_EXPORT_SYMBOL(RTTimeNanoTSLegacySyncInvarWithDeltaUseApicId);

# undef  TMPL_GET_CPU_METHOD
# define TMPL_GET_CPU_METHOD     SUPGIPGETCPU_RDTSCP_MASK_MAX_SET_CPUS
# undef  rtTimeNanoTSInternalRef
# define rtTimeNanoTSInternalRef RTTimeNanoTSLegacySyncInvarWithDeltaUseRdtscp
# include "timesupref.h"
RT_EXPORT_SYMBOL(RTTimeNanoTSLegacySyncInvarWithDeltaUseRdtscp);

# undef  TMPL_GET_CPU_METHOD
# define TMPL_GET_CPU_METHOD     SUPGIPGETCPU_IDTR_LIMIT_MASK_MAX_SET_CPUS
# undef  rtTimeNanoTSInternalRef
# define rtTimeNanoTSInternalRef RTTimeNanoTSLegacySyncInvarWithDeltaUseIdtrLim
# include "timesupref.h"
RT_EXPORT_SYMBOL(RTTimeNanoTSLegacySyncInvarWithDeltaUseIdtrLim);

# undef  TMPL_MODE
# define TMPL_MODE               TMPL_MODE_ASYNC
# undef  TMPL_GET_CPU_METHOD
# define TMPL_GET_CPU_METHOD     SUPGIPGETCPU_APIC_ID
# undef  rtTimeNanoTSInternalRef
# define rtTimeNanoTSInternalRef RTTimeNanoTSLegacyAsyncUseApicId
# include "timesupref.h"
RT_EXPORT_SYMBOL(RTTimeNanoTSLegacyAsyncUseApicId);

# undef  TMPL_GET_CPU_METHOD
# define TMPL_GET_CPU_METHOD     SUPGIPGETCPU_RDTSCP_MASK_MAX_SET_CPUS
# undef  rtTimeNanoTSInternalRef
# define rtTimeNanoTSInternalRef RTTimeNanoTSLegacyAsyncUseRdtscp
# include "timesupref.h"
RT_EXPORT_SYMBOL(RTTimeNanoTSLegacyAsyncUseRdtscp);

# undef  TMPL_GET_CPU_METHOD
# define TMPL_GET_CPU_METHOD     SUPGIPGETCPU_IDTR_LIMIT_MASK_MAX_SET_CPUS
# undef  rtTimeNanoTSInternalRef
# define rtTimeNanoTSInternalRef RTTimeNanoTSLegacyAsyncUseIdtrLim
# include "timesupref.h"
RT_EXPORT_SYMBOL(RTTimeNanoTSLegacyAsyncUseIdtrLim);

#else  /* IN_RC || IN_RING0: Disable interrupts and call getter function. */

# undef  TMPL_MODE
# define TMPL_MODE               TMPL_MODE_SYNC_INVAR_WITH_DELTA
# undef  TMPL_GET_CPU_METHOD
# define TMPL_GET_CPU_METHOD     UINT32_MAX
# undef  rtTimeNanoTSInternalRef
# define rtTimeNanoTSInternalRef RTTimeNanoTSLegacySyncInvarWithDelta
# include "timesupref.h"
RT_EXPORT_SYMBOL(RTTimeNanoTSLegacySyncInvarWithDelta);

# undef  TMPL_MODE
# define TMPL_MODE TMPL_MODE_ASYNC
# undef  rtTimeNanoTSInternalRef
# define rtTimeNanoTSInternalRef RTTimeNanoTSLegacyAsync
# include "timesupref.h"
RT_EXPORT_SYMBOL(RTTimeNanoTSLegacyAsync);

#endif


/*
 * Use LFENCE for load serialization.
 */
#undef  TMPL_READ_FENCE
#define TMPL_READ_FENCE()        ASMReadFenceSSE2()

#undef  TMPL_MODE
#define TMPL_MODE                TMPL_MODE_SYNC_INVAR_NO_DELTA
#undef  TMPL_GET_CPU_METHOD
#define TMPL_GET_CPU_METHOD      0
#undef  rtTimeNanoTSInternalRef
#define rtTimeNanoTSInternalRef  RTTimeNanoTSLFenceSyncInvarNoDelta
#include "timesupref.h"
RT_EXPORT_SYMBOL(RTTimeNanoTSLFenceSyncInvarNoDelta);

#ifdef IN_RING3

# undef  TMPL_MODE
# define TMPL_MODE               TMPL_MODE_SYNC_INVAR_WITH_DELTA
# undef  TMPL_GET_CPU_METHOD
# define TMPL_GET_CPU_METHOD     SUPGIPGETCPU_APIC_ID
# undef  rtTimeNanoTSInternalRef
# define rtTimeNanoTSInternalRef RTTimeNanoTSLFenceSyncInvarWithDeltaUseApicId
# include "timesupref.h"
RT_EXPORT_SYMBOL(RTTimeNanoTSLFenceSyncInvarWithDeltaUseApicId);

# undef  TMPL_GET_CPU_METHOD
# define TMPL_GET_CPU_METHOD     SUPGIPGETCPU_RDTSCP_MASK_MAX_SET_CPUS
# undef  rtTimeNanoTSInternalRef
# define rtTimeNanoTSInternalRef RTTimeNanoTSLFenceSyncInvarWithDeltaUseRdtscp
# include "timesupref.h"
RT_EXPORT_SYMBOL(RTTimeNanoTSLFenceSyncInvarWithDeltaUseRdtscp);

# undef  TMPL_GET_CPU_METHOD
# define TMPL_GET_CPU_METHOD     SUPGIPGETCPU_IDTR_LIMIT_MASK_MAX_SET_CPUS
# undef  rtTimeNanoTSInternalRef
# define rtTimeNanoTSInternalRef RTTimeNanoTSLFenceSyncInvarWithDeltaUseIdtrLim
# include "timesupref.h"
RT_EXPORT_SYMBOL(RTTimeNanoTSLFenceSyncInvarWithDeltaUseIdtrLim);

# undef  TMPL_MODE
# define TMPL_MODE               TMPL_MODE_ASYNC
# undef  TMPL_GET_CPU_METHOD
# define TMPL_GET_CPU_METHOD     SUPGIPGETCPU_APIC_ID
# undef  rtTimeNanoTSInternalRef
# define rtTimeNanoTSInternalRef RTTimeNanoTSLFenceAsyncUseApicId
# include "timesupref.h"
RT_EXPORT_SYMBOL(RTTimeNanoTSLFenceAsyncUseApicId);

# undef  TMPL_GET_CPU_METHOD
# define TMPL_GET_CPU_METHOD     SUPGIPGETCPU_RDTSCP_MASK_MAX_SET_CPUS
# undef  rtTimeNanoTSInternalRef
# define rtTimeNanoTSInternalRef RTTimeNanoTSLFenceAsyncUseRdtscp
# include "timesupref.h"
RT_EXPORT_SYMBOL(RTTimeNanoTSLFenceAsyncUseRdtscp);

# undef  TMPL_GET_CPU_METHOD
# define TMPL_GET_CPU_METHOD     SUPGIPGETCPU_IDTR_LIMIT_MASK_MAX_SET_CPUS
# undef  rtTimeNanoTSInternalRef
# define rtTimeNanoTSInternalRef RTTimeNanoTSLFenceAsyncUseIdtrLim
# include "timesupref.h"
RT_EXPORT_SYMBOL(RTTimeNanoTSLFenceAsyncUseIdtrLim);

#else  /* IN_RC || IN_RING0: Disable interrupts and call getter function. */

# undef  TMPL_MODE
# define TMPL_MODE               TMPL_MODE_SYNC_INVAR_WITH_DELTA
# undef  TMPL_GET_CPU_METHOD
# define TMPL_GET_CPU_METHOD     UINT32_MAX
# undef  rtTimeNanoTSInternalRef
# define rtTimeNanoTSInternalRef RTTimeNanoTSLFenceSyncInvarWithDelta
# include "timesupref.h"
RT_EXPORT_SYMBOL(RTTimeNanoTSLFenceSyncInvarWithDelta);

# undef  TMPL_MODE
# define TMPL_MODE TMPL_MODE_ASYNC
# undef  rtTimeNanoTSInternalRef
# define rtTimeNanoTSInternalRef RTTimeNanoTSLFenceAsync
# include "timesupref.h"
RT_EXPORT_SYMBOL(RTTimeNanoTSLFenceAsync);

#endif


#endif /* !IN_GUEST && !RT_NO_GIP */