TMInternal.h@ 19502

Last change on this file since 19502 was 19499, checked in by vboxsync, 16 years ago
TMInternal.h: Made TMTIMER::offShcduleNext volatile and switched from ASMAtomicXchgSize to ASMAtomicXchgU32 for updating the state.
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File size: 21.7 KB

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1	/* $Id: TMInternal.h 19499 2009-05-07 18:10:25Z vboxsync $ */
2	/** @file
3	* TM - Internal header file.
4	*/
5
6	/*
7	* Copyright (C) 2006-2007 Sun Microsystems, Inc.
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.virtualbox.org. This file is free software;
11	* you can redistribute it and/or modify it under the terms of the GNU
12	* General Public License (GPL) as published by the Free Software
13	* Foundation, in version 2 as it comes in the "COPYING" file of the
14	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16	*
17	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
18	* Clara, CA 95054 USA or visit http://www.sun.com if you need
19	* additional information or have any questions.
20	*/
21
22	#ifndef ___TMInternal_h
23	#define ___TMInternal_h
24
25	#include <VBox/cdefs.h>
26	#include <VBox/types.h>
27	#include <iprt/time.h>
28	#include <iprt/timer.h>
29	#include <iprt/assert.h>
30	#include <VBox/stam.h>
31	#include <VBox/pdmcritsect.h>
32
33	__BEGIN_DECLS
34
35
36	/** @defgroup grp_tm_int Internal
37	* @ingroup grp_tm
38	* @internal
39	* @{
40	*/
41
42	/** Frequency of the real clock. */
43	#define TMCLOCK_FREQ_REAL UINT32_C(1000)
44	/** Frequency of the virtual clock. */
45	#define TMCLOCK_FREQ_VIRTUAL UINT32_C(1000000000)
46
47
48	/**
49	* Timer type.
50	*/
51	typedef enum TMTIMERTYPE
52	{
53	/** Device timer. */
54	TMTIMERTYPE_DEV = 1,
55	/** Driver timer. */
56	TMTIMERTYPE_DRV,
57	/** Internal timer . */
58	TMTIMERTYPE_INTERNAL,
59	/** External timer. */
60	TMTIMERTYPE_EXTERNAL
61	} TMTIMERTYPE;
62
63	/**
64	* Timer state
65	*/
66	typedef enum TMTIMERSTATE
67	{
68	/** Timer is stopped. */
69	TMTIMERSTATE_STOPPED = 1,
70	/** Timer is active. */
71	TMTIMERSTATE_ACTIVE,
72	/** Timer is expired, is being delivered. */
73	TMTIMERSTATE_EXPIRED,
74
75	/** Timer is stopped but still in the active list.
76	* Currently in the ScheduleTimers list. */
77	TMTIMERSTATE_PENDING_STOP,
78	/** Timer is stopped but needs unlinking from the ScheduleTimers list.
79	* Currently in the ScheduleTimers list. */
80	TMTIMERSTATE_PENDING_STOP_SCHEDULE,
81	/** Timer is being modified and will soon be pending scheduling.
82	* Currently in the ScheduleTimers list. */
83	TMTIMERSTATE_PENDING_SCHEDULE_SET_EXPIRE,
84	/** Timer is pending scheduling.
85	* Currently in the ScheduleTimers list. */
86	TMTIMERSTATE_PENDING_SCHEDULE,
87	/** Timer is being modified and will soon be pending rescheduling.
88	* Currently in the ScheduleTimers list and the active list. */
89	TMTIMERSTATE_PENDING_RESCHEDULE_SET_EXPIRE,
90	/** Timer is modified and is now pending rescheduling.
91	* Currently in the ScheduleTimers list and the active list. */
92	TMTIMERSTATE_PENDING_RESCHEDULE,
93	/** Timer is destroyed but needs to be replaced from the
94	* active to the free list.
95	* Currently in the ScheduleTimers list and the active list. */
96	TMTIMERSTATE_PENDING_STOP_DESTROY,
97	/** Timer is destroyed but needs moving to the free list.
98	* Currently in the ScheduleTimers list. */
99	TMTIMERSTATE_PENDING_DESTROY,
100	/** Timer is free. */
101	TMTIMERSTATE_FREE
102	} TMTIMERSTATE;
103
104
105	/**
106	* Internal representation of a timer.
107	*
108	* For correct serialization (without the use of semaphores and
109	* other blocking/slow constructs) certain rules applies to updating
110	* this structure:
111	* - For thread other than EMT only u64Expire, enmState and pScheduleNext*
112	* are changeable. Everything else is out of bounds.
113	* - Updating of u64Expire timer can only happen in the TMTIMERSTATE_STOPPED
114	* and TMTIMERSTATE_PENDING_RESCHEDULING_SET_EXPIRE states.
115	* - Timers in the TMTIMERSTATE_EXPIRED state are only accessible from EMT.
116	* - Actual destruction of a timer can only be done at scheduling time.
117	*/
118	typedef struct TMTIMER
119	{
120	/** Expire time. */
121	volatile uint64_t u64Expire;
122	/** Clock to apply to u64Expire. */
123	TMCLOCK enmClock;
124	/** Timer callback type. */
125	TMTIMERTYPE enmType;
126	/** Type specific data. */
127	union
128	{
129	/** TMTIMERTYPE_DEV. */
130	struct
131	{
132	/** Callback. */
133	R3PTRTYPE(PFNTMTIMERDEV) pfnTimer;
134	/** Device instance. */
135	PPDMDEVINSR3 pDevIns;
136	} Dev;
137
138	/** TMTIMERTYPE_DRV. */
139	struct
140	{
141	/** Callback. */
142	R3PTRTYPE(PFNTMTIMERDRV) pfnTimer;
143	/** Device instance. */
144	R3PTRTYPE(PPDMDRVINS) pDrvIns;
145	} Drv;
146
147	/** TMTIMERTYPE_INTERNAL. */
148	struct
149	{
150	/** Callback. */
151	R3PTRTYPE(PFNTMTIMERINT) pfnTimer;
152	/** User argument. */
153	RTR3PTR pvUser;
154	} Internal;
155
156	/** TMTIMERTYPE_EXTERNAL. */
157	struct
158	{
159	/** Callback. */
160	R3PTRTYPE(PFNTMTIMEREXT) pfnTimer;
161	/** User data. */
162	RTR3PTR pvUser;
163	} External;
164	} u;
165
166	/** Timer state. */
167	volatile TMTIMERSTATE enmState;
168	/** Timer relative offset to the next timer in the schedule list. */
169	int32_t volatile offScheduleNext;
170
171	/** Timer relative offset to the next timer in the chain. */
172	int32_t offNext;
173	/** Timer relative offset to the previous timer in the chain. */
174	int32_t offPrev;
175
176	/** Pointer to the next timer in the list of created or free timers. (TM::pTimers or TM::pFree) */
177	PTMTIMERR3 pBigNext;
178	/** Pointer to the previous timer in the list of all created timers. (TM::pTimers) */
179	PTMTIMERR3 pBigPrev;
180	/** Pointer to the timer description. */
181	R3PTRTYPE(const char *) pszDesc;
182	/** Pointer to the VM the timer belongs to - R3 Ptr. */
183	PVMR3 pVMR3;
184	/** Pointer to the VM the timer belongs to - R0 Ptr. */
185	PVMR0 pVMR0;
186	/** Pointer to the VM the timer belongs to - RC Ptr. */
187	PVMRC pVMRC;
188	#if HC_ARCH_BITS == 64
189	RTRCPTR padding0; /*< pad structure to multiple of 8 bytes. /
190	#endif
191	} TMTIMER;
192	AssertCompileMemberSize(TMTIMER, enmState, sizeof(uint32_t));
193
194
195	/**
196	* Updates a timer state in the correct atomic manner.
197	*/
198	#if 1
199	# define TM_SET_STATE(pTimer, state) \
200	ASMAtomicWriteU32((uint32_t volatile *)&(pTimer)->enmState, state)
201	#else
202	# define TM_SET_STATE(pTimer, state) \
203	do { \
204	uint32_t uOld1 = (pTimer)->enmState; \
205	Log(("%s: %p: %d -> %d\n", __FUNCTION__, (pTimer), (pTimer)->enmState, state)); \
206	uint32_t uOld2 = ASMAtomicXchgU32((uint32_t volatile *)&(pTimer)->enmState, state); \
207	Assert(uOld1 == uOld2); \
208	} while (0)
209	#endif
210
211	/**
212	* Tries to updates a timer state in the correct atomic manner.
213	*/
214	#if 1
215	# define TM_TRY_SET_STATE(pTimer, StateNew, StateOld, fRc) \
216	(fRc) = ASMAtomicCmpXchgU32((uint32_t volatile *)&(pTimer)->enmState, StateNew, StateOld)
217	#else
218	# define TM_TRY_SET_STATE(pTimer, StateNew, StateOld, fRc) \
219	do { (fRc) = ASMAtomicCmpXchgU32((uint32_t volatile *)&(pTimer)->enmState, StateNew, StateOld); \
220	Log(("%s: %p: %d -> %d %RTbool\n", __FUNCTION__, (pTimer), StateOld, StateNew, fRc)); \
221	} while (0)
222	#endif
223
224	/** Get the previous timer. */
225	#define TMTIMER_GET_PREV(pTimer) ((PTMTIMER)((pTimer)->offPrev ? (intptr_t)(pTimer) + (pTimer)->offPrev : 0))
226	/** Get the next timer. */
227	#define TMTIMER_GET_NEXT(pTimer) ((PTMTIMER)((pTimer)->offNext ? (intptr_t)(pTimer) + (pTimer)->offNext : 0))
228	/** Set the previous timer link. */
229	#define TMTIMER_SET_PREV(pTimer, pPrev) ((pTimer)->offPrev = (pPrev) ? (intptr_t)(pPrev) - (intptr_t)(pTimer) : 0)
230	/** Set the next timer link. */
231	#define TMTIMER_SET_NEXT(pTimer, pNext) ((pTimer)->offNext = (pNext) ? (intptr_t)(pNext) - (intptr_t)(pTimer) : 0)
232
233
234	/**
235	* A timer queue.
236	*
237	* This is allocated on the hyper heap.
238	*/
239	typedef struct TMTIMERQUEUE
240	{
241	/** The cached expire time for this queue.
242	* Updated by EMT when scheduling the queue or modifying the head timer.
243	* Assigned UINT64_MAX when there is no head timer. */
244	uint64_t u64Expire;
245	/** Doubly linked list of active timers.
246	*
247	* When no scheduling is pending, this list is will be ordered by expire time (ascending).
248	* Access is serialized by only letting the emulation thread (EMT) do changes.
249	*
250	* The offset is relative to the queue structure.
251	*/
252	int32_t offActive;
253	/** List of timers pending scheduling of some kind.
254	*
255	* Timer stats allowed in the list are TMTIMERSTATE_PENDING_STOPPING,
256	* TMTIMERSTATE_PENDING_DESTRUCTION, TMTIMERSTATE_PENDING_STOPPING_DESTRUCTION,
257	* TMTIMERSTATE_PENDING_RESCHEDULING and TMTIMERSTATE_PENDING_SCHEDULE.
258	*
259	* The offset is relative to the queue structure.
260	*/
261	int32_t volatile offSchedule;
262	/** The clock for this queue. */
263	TMCLOCK enmClock;
264	/** Pad the structure up to 32 bytes. */
265	uint32_t au32Padding[3];
266	} TMTIMERQUEUE;
267
268	/** Pointer to a timer queue. */
269	typedef TMTIMERQUEUE *PTMTIMERQUEUE;
270
271	/** Get the head of the active timer list. */
272	#define TMTIMER_GET_HEAD(pQueue) ((PTMTIMER)((pQueue)->offActive ? (intptr_t)(pQueue) + (pQueue)->offActive : 0))
273	/** Set the head of the active timer list. */
274	#define TMTIMER_SET_HEAD(pQueue, pHead) ((pQueue)->offActive = pHead ? (intptr_t)pHead - (intptr_t)(pQueue) : 0)
275
276
277	/**
278	* Converts a TM pointer into a VM pointer.
279	* @returns Pointer to the VM structure the TM is part of.
280	* @param pTM Pointer to TM instance data.
281	*/
282	#define TM2VM(pTM) ( (PVM)((char*)pTM - pTM->offVM) )
283
284
285	/**
286	* TM VM Instance data.
287	* Changes to this must checked against the padding of the cfgm union in VM!
288	*/
289	typedef struct TM
290	{
291	/** Offset to the VM structure.
292	* See TM2VM(). */
293	RTUINT offVM;
294
295	/** Set if we fully virtualize the TSC, i.e. intercept all rdtsc instructions.
296	* Config variable: TSCVirtualized (bool) */
297	bool fTSCVirtualized;
298	/** Set if we use the real TSC as time source or if we use the virtual clock.
299	* If fTSCVirtualized is set we maintain a offset to the TSC and pausing/resuming the
300	* ticking. fTSCVirtualized = false implies fTSCUseRealTSC = true.
301	* Config variable: TSCUseRealTSC (bool) */
302	bool fTSCUseRealTSC;
303	/** Flag indicating that the host TSC is suitable for use in AMD-V and VT-x mode.
304	* Config variable: MaybeUseOffsettedHostTSC (boolean) */
305	bool fMaybeUseOffsettedHostTSC;
306	/** Whether the TSC is tied to the execution of code.
307	* Config variable: TSCTiedToExecution (bool) */
308	bool fTSCTiedToExecution;
309	/** Modifier for fTSCTiedToExecution which pauses the TSC while halting if true.
310	* Config variable: TSCNotTiedToHalt (bool) */
311	bool fTSCNotTiedToHalt;
312	bool afAlignment0[6]; /*< alignment padding /
313	/** The number of CPU clock ticks per second (TMCLOCK_TSC).
314	* Config variable: TSCTicksPerSecond (64-bit unsigned int)
315	* The config variable implies fTSCVirtualized = true and fTSCUseRealTSC = false. */
316	uint64_t cTSCTicksPerSecond;
317
318	/** Virtual time ticking enabled indicator (counter for each VCPU). (TMCLOCK_VIRTUAL) */
319	uint32_t volatile cVirtualTicking;
320	/** Virtual time is not running at 100%. */
321	bool fVirtualWarpDrive;
322	/** Virtual timer synchronous time ticking enabled indicator (bool). (TMCLOCK_VIRTUAL_SYNC) */
323	bool volatile fVirtualSyncTicking;
324	/** Virtual timer synchronous time catch-up active. */
325	bool volatile fVirtualSyncCatchUp;
326	bool afAlignment[5]; /*< alignment padding /
327	/** WarpDrive percentage.
328	* 100% is normal (fVirtualSyncNormal == true). When other than 100% we apply
329	* this percentage to the raw time source for the period it's been valid in,
330	* i.e. since u64VirtualWarpDriveStart. */
331	uint32_t u32VirtualWarpDrivePercentage;
332
333	/** The offset of the virtual clock relative to it's timesource.
334	* Only valid if fVirtualTicking is set. */
335	uint64_t u64VirtualOffset;
336	/** The guest virtual time when fVirtualTicking is cleared. */
337	uint64_t u64Virtual;
338	/** When the Warp drive was started or last adjusted.
339	* Only valid when fVirtualWarpDrive is set. */
340	uint64_t u64VirtualWarpDriveStart;
341	/** The previously returned nano TS.
342	* This handles TSC drift on SMP systems and expired interval.
343	* This is a valid range u64NanoTS to u64NanoTS + 1000000000 (ie. 1sec). */
344	uint64_t volatile u64VirtualRawPrev;
345	/** The ring-3 data structure for the RTTimeNanoTS workers used by tmVirtualGetRawNanoTS. */
346	RTTIMENANOTSDATAR3 VirtualGetRawDataR3;
347	/** The ring-0 data structure for the RTTimeNanoTS workers used by tmVirtualGetRawNanoTS. */
348	RTTIMENANOTSDATAR0 VirtualGetRawDataR0;
349	/** The ring-0 data structure for the RTTimeNanoTS workers used by tmVirtualGetRawNanoTS. */
350	RTTIMENANOTSDATARC VirtualGetRawDataRC;
351	/** Pointer to the ring-3 tmVirtualGetRawNanoTS worker function. */
352	R3PTRTYPE(PFNTIMENANOTSINTERNAL) pfnVirtualGetRawR3;
353	/** Pointer to the ring-3 tmVirtualGetRawNanoTS worker function. */
354	R0PTRTYPE(PFNTIMENANOTSINTERNAL) pfnVirtualGetRawR0;
355	/** Pointer to the ring-3 tmVirtualGetRawNanoTS worker function. */
356	RCPTRTYPE(PFNTIMENANOTSINTERNAL) pfnVirtualGetRawRC;
357	/** Alignment. */
358	RTRCPTR AlignmentRCPtr;
359	/** The guest virtual timer synchronous time when fVirtualSyncTicking is cleared. */
360	uint64_t volatile u64VirtualSync;
361	/** The offset of the timer synchronous virtual clock (TMCLOCK_VIRTUAL_SYNC) relative
362	* to the virtual clock (TMCLOCK_VIRTUAL).
363	* (This is accessed by the timer thread and must be updated atomically.) */
364	uint64_t volatile offVirtualSync;
365	/** The offset into offVirtualSync that's been irrevocably given up by failed catch-up attempts.
366	* Thus the current lag is offVirtualSync - offVirtualSyncGivenUp. */
367	uint64_t offVirtualSyncGivenUp;
368	/** The TMCLOCK_VIRTUAL at the previous TMVirtualGetSync call when catch-up is active. */
369	uint64_t volatile u64VirtualSyncCatchUpPrev;
370	/** The current catch-up percentage. */
371	uint32_t volatile u32VirtualSyncCatchUpPercentage;
372	/** How much slack when processing timers. */
373	uint32_t u32VirtualSyncScheduleSlack;
374	/** When to stop catch-up. */
375	uint64_t u64VirtualSyncCatchUpStopThreshold;
376	/** When to give up catch-up. */
377	uint64_t u64VirtualSyncCatchUpGiveUpThreshold;
378	/** @def TM_MAX_CATCHUP_PERIODS
379	* The number of catchup rates. */
380	#define TM_MAX_CATCHUP_PERIODS 10
381	/** The agressivness of the catch-up relative to how far we've lagged behind.
382	* The idea is to have increasing catch-up percentage as the lag increases. */
383	struct TMCATCHUPPERIOD
384	{
385	uint64_t u64Start; /*< When this period starts. (u64VirtualSyncOffset). /
386	uint32_t u32Percentage; /*< The catch-up percent to apply. /
387	uint32_t u32Alignment; /*< Structure alignment /
388	} aVirtualSyncCatchUpPeriods[TM_MAX_CATCHUP_PERIODS];
389
390	/** The UTC offset in ns.
391	* This is NOT for converting UTC to local time. It is for converting real
392	* world UTC time to VM UTC time. This feature is indented for doing date
393	* testing of software and similar.
394	* @todo Implement warpdrive on UTC. */
395	int64_t offUTC;
396
397	/** Timer queues for the different clock types - R3 Ptr */
398	R3PTRTYPE(PTMTIMERQUEUE) paTimerQueuesR3;
399	/** Timer queues for the different clock types - R0 Ptr */
400	R0PTRTYPE(PTMTIMERQUEUE) paTimerQueuesR0;
401	/** Timer queues for the different clock types - RC Ptr */
402	RCPTRTYPE(PTMTIMERQUEUE) paTimerQueuesRC;
403
404	/** Pointer to our RC mapping of the GIP. */
405	RCPTRTYPE(void *) pvGIPRC;
406	/** Pointer to our R3 mapping of the GIP. */
407	R3PTRTYPE(void *) pvGIPR3;
408
409	/** Pointer to a singly linked list of free timers.
410	* This chain is using the TMTIMER::pBigNext members.
411	* Only accessible from the emulation thread. */
412	PTMTIMERR3 pFree;
413
414	/** Pointer to a doubly linked list of created timers.
415	* This chain is using the TMTIMER::pBigNext and TMTIMER::pBigPrev members.
416	* Only accessible from the emulation thread. */
417	PTMTIMERR3 pCreated;
418
419	/** The schedulation timer timer handle (runtime timer).
420	* This timer will do freqent check on pending queue schedulations and
421	* raise VM_FF_TIMER to pull EMTs attention to them.
422	*/
423	R3PTRTYPE(PRTTIMER) pTimer;
424	/** Interval in milliseconds of the pTimer timer. */
425	uint32_t u32TimerMillies;
426
427	/** Makes sure only one EMT is running the queues. */
428	bool volatile fRunningQueues;
429
430	/** Lock serializing EMT access to TM. */
431	PDMCRITSECT EmtLock;
432
433	/** TMR3TimerQueuesDo
434	* @{ */
435	STAMPROFILE StatDoQueues;
436	STAMPROFILEADV StatDoQueuesSchedule;
437	STAMPROFILEADV StatDoQueuesRun;
438	/** @} */
439	/** tmSchedule
440	* @{ */
441	STAMPROFILE StatScheduleOneRZ;
442	STAMPROFILE StatScheduleOneR3;
443	STAMCOUNTER StatScheduleSetFF;
444	STAMCOUNTER StatPostponedR3;
445	STAMCOUNTER StatPostponedRZ;
446	/** @} */
447	/** Read the time
448	* @{ */
449	STAMCOUNTER StatVirtualGet;
450	STAMCOUNTER StatVirtualGetSetFF;
451	STAMCOUNTER StatVirtualGetSync;
452	STAMCOUNTER StatVirtualGetSyncSetFF;
453	STAMCOUNTER StatVirtualPause;
454	STAMCOUNTER StatVirtualResume;
455	/* @} */
456	/** TMTimerPoll
457	* @{ */
458	STAMCOUNTER StatPollAlreadySet;
459	STAMCOUNTER StatPollVirtual;
460	STAMCOUNTER StatPollVirtualSync;
461	STAMCOUNTER StatPollMiss;
462	/** @} */
463	/** TMTimerSet
464	* @{ */
465	STAMPROFILE StatTimerSetRZ;
466	STAMPROFILE StatTimerSetR3;
467	/** @} */
468	/** TMTimerStop
469	* @{ */
470	STAMPROFILE StatTimerStopRZ;
471	STAMPROFILE StatTimerStopR3;
472	/** @} */
473	/** VirtualSync - Running and Catching Up
474	* @{ */
475	STAMCOUNTER StatVirtualSyncRun;
476	STAMCOUNTER StatVirtualSyncRunRestart;
477	STAMPROFILE StatVirtualSyncRunSlack;
478	STAMCOUNTER StatVirtualSyncRunStop;
479	STAMCOUNTER StatVirtualSyncRunStoppedAlready;
480	STAMCOUNTER StatVirtualSyncGiveUp;
481	STAMCOUNTER StatVirtualSyncGiveUpBeforeStarting;
482	STAMPROFILEADV StatVirtualSyncCatchup;
483	STAMCOUNTER aStatVirtualSyncCatchupInitial[TM_MAX_CATCHUP_PERIODS];
484	STAMCOUNTER aStatVirtualSyncCatchupAdjust[TM_MAX_CATCHUP_PERIODS];
485	/** @} */
486	/** The timer callback. */
487	STAMCOUNTER StatTimerCallbackSetFF;
488
489	/** @name Reasons for refusing TSC offsetting in TMCpuTickCanUseRealTSC.
490	* @{ */
491	STAMCOUNTER StatTSCNotFixed;
492	STAMCOUNTER StatTSCNotTicking;
493	STAMCOUNTER StatTSCCatchupLE010;
494	STAMCOUNTER StatTSCCatchupLE025;
495	STAMCOUNTER StatTSCCatchupLE100;
496	STAMCOUNTER StatTSCCatchupOther;
497	STAMCOUNTER StatTSCWarp;
498	STAMCOUNTER StatTSCSyncNotTicking;
499	/** @} */
500	} TM;
501	/** Pointer to TM VM instance data. */
502	typedef TM *PTM;
503
504	/**
505	* TM VMCPU Instance data.
506	* Changes to this must checked against the padding of the tm union in VM!
507	*/
508	typedef struct TMCPU
509	{
510	/** Offset to the VMCPU structure.
511	* See TMCPU2VM(). */
512	RTUINT offVMCPU;
513
514	/** CPU timestamp ticking enabled indicator (bool). (RDTSC) */
515	bool fTSCTicking;
516	bool afAlignment0[3]; /*< alignment padding /
517
518	/** The offset between the host TSC and the Guest TSC.
519	* Only valid if fTicking is set and and fTSCUseRealTSC is clear. */
520	uint64_t u64TSCOffset;
521
522	/** The guest TSC when fTicking is cleared. */
523	uint64_t u64TSC;
524
525	} TMCPU;
526	/** Pointer to TM VMCPU instance data. */
527	typedef TMCPU *PTMCPU;
528
529	#if 0 /* enable this to rule out locking bugs on single cpu guests. */
530	# define tmLock(pVM) VINF_SUCCESS
531	# define tmTryLock(pVM) VINF_SUCCESS
532	# define tmUnlock(pVM) ((void)0)
533	# define TM_ASSERT_EMT_LOCK(pVM) VM_ASSERT_EMT(pVM)
534	#else
535	int tmLock(PVM pVM);
536	int tmTryLock(PVM pVM);
537	void tmUnlock(PVM pVM);
538	/** Checks that the caller owns the EMT lock. */
539	#define TM_ASSERT_EMT_LOCK(pVM) Assert(PDMCritSectIsOwner(&pVM->tm.s.EmtLock))
540	#endif
541
542	const char *tmTimerState(TMTIMERSTATE enmState);
543	void tmTimerQueueSchedule(PVM pVM, PTMTIMERQUEUE pQueue);
544	#ifdef VBOX_STRICT
545	void tmTimerQueuesSanityChecks(PVM pVM, const char *pszWhere);
546	#endif
547
548	int tmCpuTickPause(PVM pVM, PVMCPU pVCpu);
549	int tmCpuTickResume(PVM pVM, PVMCPU pVCpu);
550
551	DECLEXPORT(void) tmVirtualNanoTSBad(PRTTIMENANOTSDATA pData, uint64_t u64NanoTS, uint64_t u64DeltaPrev, uint64_t u64PrevNanoTS);
552	DECLEXPORT(uint64_t) tmVirtualNanoTSRediscover(PRTTIMENANOTSDATA pData);
553
554
555	/** @} */
556
557	__END_DECLS
558
559	#endif
560

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source: vbox/trunk/src/VBox/VMM/TMInternal.h@ 19502

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