TMInternal.h@ 20050

Last change on this file since 20050 was 20050, checked in by vboxsync, 16 years ago
TM: new state and more logging (gee).
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1	/* $Id: TMInternal.h 20050 2009-05-26 17:12:12Z 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, getting expire and unlinking. */
73	TMTIMERSTATE_EXPIRED_GET_UNLINK,
74	/** Timer is expired and is being delivered. */
75	TMTIMERSTATE_EXPIRED_DELIVER,
76
77	/** Timer is stopped but still in the active list.
78	* Currently in the ScheduleTimers list. */
79	TMTIMERSTATE_PENDING_STOP,
80	/** Timer is stopped but needs unlinking from the ScheduleTimers list.
81	* Currently in the ScheduleTimers list. */
82	TMTIMERSTATE_PENDING_STOP_SCHEDULE,
83	/** Timer is being modified and will soon be pending scheduling.
84	* Currently in the ScheduleTimers list. */
85	TMTIMERSTATE_PENDING_SCHEDULE_SET_EXPIRE,
86	/** Timer is pending scheduling.
87	* Currently in the ScheduleTimers list. */
88	TMTIMERSTATE_PENDING_SCHEDULE,
89	/** Timer is being modified and will soon be pending rescheduling.
90	* Currently in the ScheduleTimers list and the active list. */
91	TMTIMERSTATE_PENDING_RESCHEDULE_SET_EXPIRE,
92	/** Timer is modified and is now pending rescheduling.
93	* Currently in the ScheduleTimers list and the active list. */
94	TMTIMERSTATE_PENDING_RESCHEDULE,
95	/** Timer is being destroyed. */
96	TMTIMERSTATE_DESTROY,
97	/** Timer is free. */
98	TMTIMERSTATE_FREE
99	} TMTIMERSTATE;
100
101	/** Predicate that returns true if the give state is pending scheduling or
102	* rescheduling of any kind. Will reference the argument more than once! */
103	#define TMTIMERSTATE_IS_PENDING_SCHEDULING(enmState) \
104	( (enmState) <= TMTIMERSTATE_PENDING_RESCHEDULE \
105	&& (enmState) >= TMTIMERSTATE_PENDING_SCHEDULE_SET_EXPIRE)
106
107
108	/**
109	* Internal representation of a timer.
110	*
111	* For correct serialization (without the use of semaphores and
112	* other blocking/slow constructs) certain rules applies to updating
113	* this structure:
114	* - For thread other than EMT only u64Expire, enmState and pScheduleNext*
115	* are changeable. Everything else is out of bounds.
116	* - Updating of u64Expire timer can only happen in the TMTIMERSTATE_STOPPED
117	* and TMTIMERSTATE_PENDING_RESCHEDULING_SET_EXPIRE states.
118	* - Timers in the TMTIMERSTATE_EXPIRED state are only accessible from EMT.
119	* - Actual destruction of a timer can only be done at scheduling time.
120	*/
121	typedef struct TMTIMER
122	{
123	/** Expire time. */
124	volatile uint64_t u64Expire;
125	/** Clock to apply to u64Expire. */
126	TMCLOCK enmClock;
127	/** Timer callback type. */
128	TMTIMERTYPE enmType;
129	/** Type specific data. */
130	union
131	{
132	/** TMTIMERTYPE_DEV. */
133	struct
134	{
135	/** Callback. */
136	R3PTRTYPE(PFNTMTIMERDEV) pfnTimer;
137	/** Device instance. */
138	PPDMDEVINSR3 pDevIns;
139	} Dev;
140
141	/** TMTIMERTYPE_DRV. */
142	struct
143	{
144	/** Callback. */
145	R3PTRTYPE(PFNTMTIMERDRV) pfnTimer;
146	/** Device instance. */
147	R3PTRTYPE(PPDMDRVINS) pDrvIns;
148	} Drv;
149
150	/** TMTIMERTYPE_INTERNAL. */
151	struct
152	{
153	/** Callback. */
154	R3PTRTYPE(PFNTMTIMERINT) pfnTimer;
155	/** User argument. */
156	RTR3PTR pvUser;
157	} Internal;
158
159	/** TMTIMERTYPE_EXTERNAL. */
160	struct
161	{
162	/** Callback. */
163	R3PTRTYPE(PFNTMTIMEREXT) pfnTimer;
164	/** User data. */
165	RTR3PTR pvUser;
166	} External;
167	} u;
168
169	/** Timer state. */
170	volatile TMTIMERSTATE enmState;
171	/** Timer relative offset to the next timer in the schedule list. */
172	int32_t volatile offScheduleNext;
173
174	/** Timer relative offset to the next timer in the chain. */
175	int32_t offNext;
176	/** Timer relative offset to the previous timer in the chain. */
177	int32_t offPrev;
178
179	/** Pointer to the next timer in the list of created or free timers. (TM::pTimers or TM::pFree) */
180	PTMTIMERR3 pBigNext;
181	/** Pointer to the previous timer in the list of all created timers. (TM::pTimers) */
182	PTMTIMERR3 pBigPrev;
183	/** Pointer to the timer description. */
184	R3PTRTYPE(const char *) pszDesc;
185	/** Pointer to the VM the timer belongs to - R3 Ptr. */
186	PVMR3 pVMR3;
187	/** Pointer to the VM the timer belongs to - R0 Ptr. */
188	PVMR0 pVMR0;
189	/** Pointer to the VM the timer belongs to - RC Ptr. */
190	PVMRC pVMRC;
191	#if HC_ARCH_BITS == 64
192	RTRCPTR padding0; /*< pad structure to multiple of 8 bytes. /
193	#endif
194	} TMTIMER;
195	AssertCompileMemberSize(TMTIMER, enmState, sizeof(uint32_t));
196
197
198	/**
199	* Updates a timer state in the correct atomic manner.
200	*/
201	#if 1
202	# define TM_SET_STATE(pTimer, state) \
203	ASMAtomicWriteU32((uint32_t volatile *)&(pTimer)->enmState, state)
204	#else
205	# define TM_SET_STATE(pTimer, state) \
206	do { \
207	uint32_t uOld1 = (pTimer)->enmState; \
208	Log(("%s: %p: %d -> %d\n", __FUNCTION__, (pTimer), (pTimer)->enmState, state)); \
209	uint32_t uOld2 = ASMAtomicXchgU32((uint32_t volatile *)&(pTimer)->enmState, state); \
210	Assert(uOld1 == uOld2); \
211	} while (0)
212	#endif
213
214	/**
215	* Tries to updates a timer state in the correct atomic manner.
216	*/
217	#if 1
218	# define TM_TRY_SET_STATE(pTimer, StateNew, StateOld, fRc) \
219	(fRc) = ASMAtomicCmpXchgU32((uint32_t volatile *)&(pTimer)->enmState, StateNew, StateOld)
220	#else
221	# define TM_TRY_SET_STATE(pTimer, StateNew, StateOld, fRc) \
222	do { (fRc) = ASMAtomicCmpXchgU32((uint32_t volatile *)&(pTimer)->enmState, StateNew, StateOld); \
223	Log(("%s: %p: %d -> %d %RTbool\n", __FUNCTION__, (pTimer), StateOld, StateNew, fRc)); \
224	} while (0)
225	#endif
226
227	/** Get the previous timer. */
228	#define TMTIMER_GET_PREV(pTimer) ((PTMTIMER)((pTimer)->offPrev ? (intptr_t)(pTimer) + (pTimer)->offPrev : 0))
229	/** Get the next timer. */
230	#define TMTIMER_GET_NEXT(pTimer) ((PTMTIMER)((pTimer)->offNext ? (intptr_t)(pTimer) + (pTimer)->offNext : 0))
231	/** Set the previous timer link. */
232	#define TMTIMER_SET_PREV(pTimer, pPrev) ((pTimer)->offPrev = (pPrev) ? (intptr_t)(pPrev) - (intptr_t)(pTimer) : 0)
233	/** Set the next timer link. */
234	#define TMTIMER_SET_NEXT(pTimer, pNext) ((pTimer)->offNext = (pNext) ? (intptr_t)(pNext) - (intptr_t)(pTimer) : 0)
235
236
237	/**
238	* A timer queue.
239	*
240	* This is allocated on the hyper heap.
241	*/
242	typedef struct TMTIMERQUEUE
243	{
244	/** The cached expire time for this queue.
245	* Updated by EMT when scheduling the queue or modifying the head timer.
246	* Assigned UINT64_MAX when there is no head timer. */
247	uint64_t u64Expire;
248	/** Doubly linked list of active timers.
249	*
250	* When no scheduling is pending, this list is will be ordered by expire time (ascending).
251	* Access is serialized by only letting the emulation thread (EMT) do changes.
252	*
253	* The offset is relative to the queue structure.
254	*/
255	int32_t offActive;
256	/** List of timers pending scheduling of some kind.
257	*
258	* Timer stats allowed in the list are TMTIMERSTATE_PENDING_STOPPING,
259	* TMTIMERSTATE_PENDING_DESTRUCTION, TMTIMERSTATE_PENDING_STOPPING_DESTRUCTION,
260	* TMTIMERSTATE_PENDING_RESCHEDULING and TMTIMERSTATE_PENDING_SCHEDULE.
261	*
262	* The offset is relative to the queue structure.
263	*/
264	int32_t volatile offSchedule;
265	/** The clock for this queue. */
266	TMCLOCK enmClock;
267	/** Pad the structure up to 32 bytes. */
268	uint32_t au32Padding[3];
269	} TMTIMERQUEUE;
270
271	/** Pointer to a timer queue. */
272	typedef TMTIMERQUEUE *PTMTIMERQUEUE;
273
274	/** Get the head of the active timer list. */
275	#define TMTIMER_GET_HEAD(pQueue) ((PTMTIMER)((pQueue)->offActive ? (intptr_t)(pQueue) + (pQueue)->offActive : 0))
276	/** Set the head of the active timer list. */
277	#define TMTIMER_SET_HEAD(pQueue, pHead) ((pQueue)->offActive = pHead ? (intptr_t)pHead - (intptr_t)(pQueue) : 0)
278
279
280	/**
281	* Converts a TM pointer into a VM pointer.
282	* @returns Pointer to the VM structure the TM is part of.
283	* @param pTM Pointer to TM instance data.
284	*/
285	#define TM2VM(pTM) ( (PVM)((char*)pTM - pTM->offVM) )
286
287
288	/**
289	* TM VM Instance data.
290	* Changes to this must checked against the padding of the cfgm union in VM!
291	*/
292	typedef struct TM
293	{
294	/** Offset to the VM structure.
295	* See TM2VM(). */
296	RTUINT offVM;
297
298	/** Set if we fully virtualize the TSC, i.e. intercept all rdtsc instructions.
299	* Config variable: TSCVirtualized (bool) */
300	bool fTSCVirtualized;
301	/** Set if we use the real TSC as time source or if we use the virtual clock.
302	* If fTSCVirtualized is set we maintain a offset to the TSC and pausing/resuming the
303	* ticking. fTSCVirtualized = false implies fTSCUseRealTSC = true.
304	* Config variable: TSCUseRealTSC (bool) */
305	bool fTSCUseRealTSC;
306	/** Flag indicating that the host TSC is suitable for use in AMD-V and VT-x mode.
307	* Config variable: MaybeUseOffsettedHostTSC (boolean) */
308	bool fMaybeUseOffsettedHostTSC;
309	/** Whether the TSC is tied to the execution of code.
310	* Config variable: TSCTiedToExecution (bool) */
311	bool fTSCTiedToExecution;
312	/** Modifier for fTSCTiedToExecution which pauses the TSC while halting if true.
313	* Config variable: TSCNotTiedToHalt (bool) */
314	bool fTSCNotTiedToHalt;
315	bool afAlignment0[2]; /*< alignment padding /
316	/** The ID of the virtual CPU that normally runs the timers. */
317	VMCPUID idTimerCpu;
318	/** The number of CPU clock ticks per second (TMCLOCK_TSC).
319	* Config variable: TSCTicksPerSecond (64-bit unsigned int)
320	* The config variable implies fTSCVirtualized = true and fTSCUseRealTSC = false. */
321	uint64_t cTSCTicksPerSecond;
322
323	/** Virtual time ticking enabled indicator (counter for each VCPU). (TMCLOCK_VIRTUAL) */
324	uint32_t volatile cVirtualTicking;
325	/** Virtual time is not running at 100%. */
326	bool fVirtualWarpDrive;
327	/** Virtual timer synchronous time ticking enabled indicator (bool). (TMCLOCK_VIRTUAL_SYNC) */
328	bool volatile fVirtualSyncTicking;
329	/** Virtual timer synchronous time catch-up active. */
330	bool volatile fVirtualSyncCatchUp;
331	bool afAlignment[5]; /*< alignment padding /
332	/** WarpDrive percentage.
333	* 100% is normal (fVirtualSyncNormal == true). When other than 100% we apply
334	* this percentage to the raw time source for the period it's been valid in,
335	* i.e. since u64VirtualWarpDriveStart. */
336	uint32_t u32VirtualWarpDrivePercentage;
337
338	/** The offset of the virtual clock relative to it's timesource.
339	* Only valid if fVirtualTicking is set. */
340	uint64_t u64VirtualOffset;
341	/** The guest virtual time when fVirtualTicking is cleared. */
342	uint64_t u64Virtual;
343	/** When the Warp drive was started or last adjusted.
344	* Only valid when fVirtualWarpDrive is set. */
345	uint64_t u64VirtualWarpDriveStart;
346	/** The previously returned nano TS.
347	* This handles TSC drift on SMP systems and expired interval.
348	* This is a valid range u64NanoTS to u64NanoTS + 1000000000 (ie. 1sec). */
349	uint64_t volatile u64VirtualRawPrev;
350	/** The ring-3 data structure for the RTTimeNanoTS workers used by tmVirtualGetRawNanoTS. */
351	RTTIMENANOTSDATAR3 VirtualGetRawDataR3;
352	/** The ring-0 data structure for the RTTimeNanoTS workers used by tmVirtualGetRawNanoTS. */
353	RTTIMENANOTSDATAR0 VirtualGetRawDataR0;
354	/** The ring-0 data structure for the RTTimeNanoTS workers used by tmVirtualGetRawNanoTS. */
355	RTTIMENANOTSDATARC VirtualGetRawDataRC;
356	/** Pointer to the ring-3 tmVirtualGetRawNanoTS worker function. */
357	R3PTRTYPE(PFNTIMENANOTSINTERNAL) pfnVirtualGetRawR3;
358	/** Pointer to the ring-3 tmVirtualGetRawNanoTS worker function. */
359	R0PTRTYPE(PFNTIMENANOTSINTERNAL) pfnVirtualGetRawR0;
360	/** Pointer to the ring-3 tmVirtualGetRawNanoTS worker function. */
361	RCPTRTYPE(PFNTIMENANOTSINTERNAL) pfnVirtualGetRawRC;
362	/** Alignment. */
363	RTRCPTR AlignmentRCPtr;
364	/** The guest virtual timer synchronous time when fVirtualSyncTicking is cleared. */
365	uint64_t volatile u64VirtualSync;
366	/** The offset of the timer synchronous virtual clock (TMCLOCK_VIRTUAL_SYNC) relative
367	* to the virtual clock (TMCLOCK_VIRTUAL).
368	* (This is accessed by the timer thread and must be updated atomically.) */
369	uint64_t volatile offVirtualSync;
370	/** The offset into offVirtualSync that's been irrevocably given up by failed catch-up attempts.
371	* Thus the current lag is offVirtualSync - offVirtualSyncGivenUp. */
372	uint64_t offVirtualSyncGivenUp;
373	/** The TMCLOCK_VIRTUAL at the previous TMVirtualGetSync call when catch-up is active. */
374	uint64_t volatile u64VirtualSyncCatchUpPrev;
375	/** The current catch-up percentage. */
376	uint32_t volatile u32VirtualSyncCatchUpPercentage;
377	/** How much slack when processing timers. */
378	uint32_t u32VirtualSyncScheduleSlack;
379	/** When to stop catch-up. */
380	uint64_t u64VirtualSyncCatchUpStopThreshold;
381	/** When to give up catch-up. */
382	uint64_t u64VirtualSyncCatchUpGiveUpThreshold;
383	/** @def TM_MAX_CATCHUP_PERIODS
384	* The number of catchup rates. */
385	#define TM_MAX_CATCHUP_PERIODS 10
386	/** The agressivness of the catch-up relative to how far we've lagged behind.
387	* The idea is to have increasing catch-up percentage as the lag increases. */
388	struct TMCATCHUPPERIOD
389	{
390	uint64_t u64Start; /*< When this period starts. (u64VirtualSyncOffset). /
391	uint32_t u32Percentage; /*< The catch-up percent to apply. /
392	uint32_t u32Alignment; /*< Structure alignment /
393	} aVirtualSyncCatchUpPeriods[TM_MAX_CATCHUP_PERIODS];
394
395	/** The UTC offset in ns.
396	* This is NOT for converting UTC to local time. It is for converting real
397	* world UTC time to VM UTC time. This feature is indented for doing date
398	* testing of software and similar.
399	* @todo Implement warpdrive on UTC. */
400	int64_t offUTC;
401
402	/** Timer queues for the different clock types - R3 Ptr */
403	R3PTRTYPE(PTMTIMERQUEUE) paTimerQueuesR3;
404	/** Timer queues for the different clock types - R0 Ptr */
405	R0PTRTYPE(PTMTIMERQUEUE) paTimerQueuesR0;
406	/** Timer queues for the different clock types - RC Ptr */
407	RCPTRTYPE(PTMTIMERQUEUE) paTimerQueuesRC;
408
409	/** Pointer to our RC mapping of the GIP. */
410	RCPTRTYPE(void *) pvGIPRC;
411	/** Pointer to our R3 mapping of the GIP. */
412	R3PTRTYPE(void *) pvGIPR3;
413
414	/** Pointer to a singly linked list of free timers.
415	* This chain is using the TMTIMER::pBigNext members.
416	* Only accessible from the emulation thread. */
417	PTMTIMERR3 pFree;
418
419	/** Pointer to a doubly linked list of created timers.
420	* This chain is using the TMTIMER::pBigNext and TMTIMER::pBigPrev members.
421	* Only accessible from the emulation thread. */
422	PTMTIMERR3 pCreated;
423
424	/** The schedulation timer timer handle (runtime timer).
425	* This timer will do freqent check on pending queue schedulations and
426	* raise VM_FF_TIMER to pull EMTs attention to them.
427	*/
428	R3PTRTYPE(PRTTIMER) pTimer;
429	/** Interval in milliseconds of the pTimer timer. */
430	uint32_t u32TimerMillies;
431
432	/** Indicates that queues are being run. */
433	bool volatile fRunningQueues;
434	/** Indicates that the virtual sync queue is being run. */
435	bool volatile fRunningVirtualSyncQueue;
436	/* Alignment */
437	bool u8Alignment[2];
438
439	/** Lock serializing EMT access to TM. */
440	PDMCRITSECT EmtLock;
441	/** Lock serializing access to the VirtualSync clock. */
442	PDMCRITSECT VirtualSyncLock;
443
444	/** TMR3TimerQueuesDo
445	* @{ */
446	STAMPROFILE StatDoQueues;
447	STAMPROFILEADV aStatDoQueues[TMCLOCK_MAX];
448	/** @} */
449	/** tmSchedule
450	* @{ */
451	STAMPROFILE StatScheduleOneRZ;
452	STAMPROFILE StatScheduleOneR3;
453	STAMCOUNTER StatScheduleSetFF;
454	STAMCOUNTER StatPostponedR3;
455	STAMCOUNTER StatPostponedRZ;
456	/** @} */
457	/** Read the time
458	* @{ */
459	STAMCOUNTER StatVirtualGet;
460	STAMCOUNTER StatVirtualGetSetFF;
461	STAMCOUNTER StatVirtualSyncGet;
462	STAMCOUNTER StatVirtualSyncGetELoop;
463	STAMCOUNTER StatVirtualSyncGetExpired;
464	STAMCOUNTER StatVirtualSyncGetLockless;
465	STAMCOUNTER StatVirtualSyncGetLocked;
466	STAMCOUNTER StatVirtualSyncGetSetFF;
467	STAMCOUNTER StatVirtualPause;
468	STAMCOUNTER StatVirtualResume;
469	/* @} */
470	/** TMTimerPoll
471	* @{ */
472	STAMCOUNTER StatPoll;
473	STAMCOUNTER StatPollAlreadySet;
474	STAMCOUNTER StatPollELoop;
475	STAMCOUNTER StatPollMiss;
476	STAMCOUNTER StatPollRunning;
477	STAMCOUNTER StatPollSimple;
478	STAMCOUNTER StatPollVirtual;
479	STAMCOUNTER StatPollVirtualSync;
480	/** @} */
481	/** TMTimerSet
482	* @{ */
483	STAMPROFILE StatTimerSetRZ;
484	STAMPROFILE StatTimerSetR3;
485	/** @} */
486	/** TMTimerStop
487	* @{ */
488	STAMPROFILE StatTimerStopRZ;
489	STAMPROFILE StatTimerStopR3;
490	/** @} */
491	/** VirtualSync - Running and Catching Up
492	* @{ */
493	STAMCOUNTER StatVirtualSyncRun;
494	STAMCOUNTER StatVirtualSyncRunRestart;
495	STAMPROFILE StatVirtualSyncRunSlack;
496	STAMCOUNTER StatVirtualSyncRunStop;
497	STAMCOUNTER StatVirtualSyncRunStoppedAlready;
498	STAMCOUNTER StatVirtualSyncGiveUp;
499	STAMCOUNTER StatVirtualSyncGiveUpBeforeStarting;
500	STAMPROFILEADV StatVirtualSyncCatchup;
501	STAMCOUNTER aStatVirtualSyncCatchupInitial[TM_MAX_CATCHUP_PERIODS];
502	STAMCOUNTER aStatVirtualSyncCatchupAdjust[TM_MAX_CATCHUP_PERIODS];
503	/** @} */
504	/** TMR3VirtualSyncFF (non dedicated EMT). */
505	STAMPROFILE StatVirtualSyncFF;
506	/** The timer callback. */
507	STAMCOUNTER StatTimerCallbackSetFF;
508
509	/** @name Reasons for refusing TSC offsetting in TMCpuTickCanUseRealTSC.
510	* @{ */
511	STAMCOUNTER StatTSCNotFixed;
512	STAMCOUNTER StatTSCNotTicking;
513	STAMCOUNTER StatTSCCatchupLE010;
514	STAMCOUNTER StatTSCCatchupLE025;
515	STAMCOUNTER StatTSCCatchupLE100;
516	STAMCOUNTER StatTSCCatchupOther;
517	STAMCOUNTER StatTSCWarp;
518	STAMCOUNTER StatTSCSyncNotTicking;
519	/** @} */
520	} TM;
521	/** Pointer to TM VM instance data. */
522	typedef TM *PTM;
523
524	/**
525	* TM VMCPU Instance data.
526	* Changes to this must checked against the padding of the tm union in VM!
527	*/
528	typedef struct TMCPU
529	{
530	/** Offset to the VMCPU structure.
531	* See TMCPU2VM(). */
532	RTUINT offVMCPU;
533
534	/** CPU timestamp ticking enabled indicator (bool). (RDTSC) */
535	bool fTSCTicking;
536	bool afAlignment0[3]; /*< alignment padding /
537
538	/** The offset between the host TSC and the Guest TSC.
539	* Only valid if fTicking is set and and fTSCUseRealTSC is clear. */
540	uint64_t u64TSCOffset;
541
542	/** The guest TSC when fTicking is cleared. */
543	uint64_t u64TSC;
544
545	} TMCPU;
546	/** Pointer to TM VMCPU instance data. */
547	typedef TMCPU *PTMCPU;
548
549	#if 0 /* enable this to rule out locking bugs on single cpu guests. */
550	# define tmLock(pVM) VINF_SUCCESS
551	# define tmTryLock(pVM) VINF_SUCCESS
552	# define tmUnlock(pVM) ((void)0)
553	# define tmVirtualSyncLock(pVM) VINF_SUCCESS
554	# define tmVirtualSyncTryLock(pVM) VINF_SUCCESS
555	# define tmVirtualSyncUnlock(pVM) ((void)0)
556	# define TM_ASSERT_EMT_LOCK(pVM) VM_ASSERT_EMT(pVM)
557	#else
558	int tmLock(PVM pVM);
559	int tmTryLock(PVM pVM);
560	void tmUnlock(PVM pVM);
561	/** Checks that the caller owns the EMT lock. */
562	#define TM_ASSERT_EMT_LOCK(pVM) Assert(PDMCritSectIsOwner(&pVM->tm.s.EmtLock))
563	int tmVirtualSyncLock(PVM pVM);
564	int tmVirtualSyncTryLock(PVM pVM);
565	void tmVirtualSyncUnlock(PVM pVM);
566	#endif
567
568	const char *tmTimerState(TMTIMERSTATE enmState);
569	void tmTimerQueueSchedule(PVM pVM, PTMTIMERQUEUE pQueue);
570	#ifdef VBOX_STRICT
571	void tmTimerQueuesSanityChecks(PVM pVM, const char *pszWhere);
572	#endif
573
574	int tmCpuTickPause(PVM pVM, PVMCPU pVCpu);
575	int tmCpuTickResume(PVM pVM, PVMCPU pVCpu);
576
577	int tmVirtualPauseLocked(PVM pVM);
578	int tmVirtualResumeLocked(PVM pVM);
579	DECLEXPORT(void) tmVirtualNanoTSBad(PRTTIMENANOTSDATA pData, uint64_t u64NanoTS, uint64_t u64DeltaPrev, uint64_t u64PrevNanoTS);
580	DECLEXPORT(uint64_t) tmVirtualNanoTSRediscover(PRTTIMENANOTSDATA pData);
581
582
583	/** @} */
584
585	__END_DECLS
586
587	#endif
588

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source: vbox/trunk/src/VBox/VMM/TMInternal.h@ 20050

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