TMInternal.h@ 29086

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1	/* $Id: TMInternal.h 28800 2010-04-27 08:22:32Z vboxsync $ */
2	/** @file
3	* TM - Internal header file.
4	*/
5
6	/*
7	* Copyright (C) 2006-2007 Oracle Corporation
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
18	#ifndef ___TMInternal_h
19	#define ___TMInternal_h
20
21	#include <VBox/cdefs.h>
22	#include <VBox/types.h>
23	#include <iprt/time.h>
24	#include <iprt/timer.h>
25	#include <iprt/assert.h>
26	#include <VBox/stam.h>
27	#include <VBox/pdmcritsect.h>
28
29	RT_C_DECLS_BEGIN
30
31
32	/** @defgroup grp_tm_int Internal
33	* @ingroup grp_tm
34	* @internal
35	* @{
36	*/
37
38	/** Frequency of the real clock. */
39	#define TMCLOCK_FREQ_REAL UINT32_C(1000)
40	/** Frequency of the virtual clock. */
41	#define TMCLOCK_FREQ_VIRTUAL UINT32_C(1000000000)
42
43
44	/**
45	* Timer type.
46	*/
47	typedef enum TMTIMERTYPE
48	{
49	/** Device timer. */
50	TMTIMERTYPE_DEV = 1,
51	/** Driver timer. */
52	TMTIMERTYPE_DRV,
53	/** Internal timer . */
54	TMTIMERTYPE_INTERNAL,
55	/** External timer. */
56	TMTIMERTYPE_EXTERNAL
57	} TMTIMERTYPE;
58
59	/**
60	* Timer state
61	*/
62	typedef enum TMTIMERSTATE
63	{
64	/** Timer is stopped. */
65	TMTIMERSTATE_STOPPED = 1,
66	/** Timer is active. */
67	TMTIMERSTATE_ACTIVE,
68	/** Timer is expired, getting expire and unlinking. */
69	TMTIMERSTATE_EXPIRED_GET_UNLINK,
70	/** Timer is expired and is being delivered. */
71	TMTIMERSTATE_EXPIRED_DELIVER,
72
73	/** Timer is stopped but still in the active list.
74	* Currently in the ScheduleTimers list. */
75	TMTIMERSTATE_PENDING_STOP,
76	/** Timer is stopped but needs unlinking from the ScheduleTimers list.
77	* Currently in the ScheduleTimers list. */
78	TMTIMERSTATE_PENDING_STOP_SCHEDULE,
79	/** Timer is being modified and will soon be pending scheduling.
80	* Currently in the ScheduleTimers list. */
81	TMTIMERSTATE_PENDING_SCHEDULE_SET_EXPIRE,
82	/** Timer is pending scheduling.
83	* Currently in the ScheduleTimers list. */
84	TMTIMERSTATE_PENDING_SCHEDULE,
85	/** Timer is being modified and will soon be pending rescheduling.
86	* Currently in the ScheduleTimers list and the active list. */
87	TMTIMERSTATE_PENDING_RESCHEDULE_SET_EXPIRE,
88	/** Timer is modified and is now pending rescheduling.
89	* Currently in the ScheduleTimers list and the active list. */
90	TMTIMERSTATE_PENDING_RESCHEDULE,
91	/** Timer is being destroyed. */
92	TMTIMERSTATE_DESTROY,
93	/** Timer is free. */
94	TMTIMERSTATE_FREE
95	} TMTIMERSTATE;
96
97	/** Predicate that returns true if the give state is pending scheduling or
98	* rescheduling of any kind. Will reference the argument more than once! */
99	#define TMTIMERSTATE_IS_PENDING_SCHEDULING(enmState) \
100	( (enmState) <= TMTIMERSTATE_PENDING_RESCHEDULE \
101	&& (enmState) >= TMTIMERSTATE_PENDING_SCHEDULE_SET_EXPIRE)
102
103
104	/**
105	* Internal representation of a timer.
106	*
107	* For correct serialization (without the use of semaphores and
108	* other blocking/slow constructs) certain rules applies to updating
109	* this structure:
110	* - For thread other than EMT only u64Expire, enmState and pScheduleNext*
111	* are changeable. Everything else is out of bounds.
112	* - Updating of u64Expire timer can only happen in the TMTIMERSTATE_STOPPED
113	* and TMTIMERSTATE_PENDING_RESCHEDULING_SET_EXPIRE states.
114	* - Timers in the TMTIMERSTATE_EXPIRED state are only accessible from EMT.
115	* - Actual destruction of a timer can only be done at scheduling time.
116	*/
117	typedef struct TMTIMER
118	{
119	/** Expire time. */
120	volatile uint64_t u64Expire;
121	/** Clock to apply to u64Expire. */
122	TMCLOCK enmClock;
123	/** Timer callback type. */
124	TMTIMERTYPE enmType;
125	/** Type specific data. */
126	union
127	{
128	/** TMTIMERTYPE_DEV. */
129	struct
130	{
131	/** Callback. */
132	R3PTRTYPE(PFNTMTIMERDEV) pfnTimer;
133	/** Device instance. */
134	PPDMDEVINSR3 pDevIns;
135	} Dev;
136
137	/** TMTIMERTYPE_DRV. */
138	struct
139	{
140	/** Callback. */
141	R3PTRTYPE(PFNTMTIMERDRV) pfnTimer;
142	/** Device instance. */
143	R3PTRTYPE(PPDMDRVINS) pDrvIns;
144	} Drv;
145
146	/** TMTIMERTYPE_INTERNAL. */
147	struct
148	{
149	/** Callback. */
150	R3PTRTYPE(PFNTMTIMERINT) pfnTimer;
151	} Internal;
152
153	/** TMTIMERTYPE_EXTERNAL. */
154	struct
155	{
156	/** Callback. */
157	R3PTRTYPE(PFNTMTIMEREXT) pfnTimer;
158	} External;
159	} u;
160
161	/** Timer state. */
162	volatile TMTIMERSTATE enmState;
163	/** Timer relative offset to the next timer in the schedule list. */
164	int32_t volatile offScheduleNext;
165
166	/** Timer relative offset to the next timer in the chain. */
167	int32_t offNext;
168	/** Timer relative offset to the previous timer in the chain. */
169	int32_t offPrev;
170
171	/** User argument. */
172	RTR3PTR pvUser;
173	/** The critical section associated with the lock. */
174	R3PTRTYPE(PPDMCRITSECT) pCritSect;
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[2]; /*< alignment padding /
313	/** The ID of the virtual CPU that normally runs the timers. */
314	VMCPUID idTimerCpu;
315	/** The number of CPU clock ticks per second (TMCLOCK_TSC).
316	* Config variable: TSCTicksPerSecond (64-bit unsigned int)
317	* The config variable implies fTSCVirtualized = true and fTSCUseRealTSC = false. */
318	uint64_t cTSCTicksPerSecond;
319
320	/** Virtual time ticking enabled indicator (counter for each VCPU). (TMCLOCK_VIRTUAL) */
321	uint32_t volatile cVirtualTicking;
322	/** Virtual time is not running at 100%. */
323	bool fVirtualWarpDrive;
324	/** Virtual timer synchronous time ticking enabled indicator (bool). (TMCLOCK_VIRTUAL_SYNC) */
325	bool volatile fVirtualSyncTicking;
326	/** Virtual timer synchronous time catch-up active. */
327	bool volatile fVirtualSyncCatchUp;
328	bool afAlignment[5]; /*< alignment padding /
329	/** WarpDrive percentage.
330	* 100% is normal (fVirtualSyncNormal == true). When other than 100% we apply
331	* this percentage to the raw time source for the period it's been valid in,
332	* i.e. since u64VirtualWarpDriveStart. */
333	uint32_t u32VirtualWarpDrivePercentage;
334
335	/** The offset of the virtual clock relative to it's timesource.
336	* Only valid if fVirtualTicking is set. */
337	uint64_t u64VirtualOffset;
338	/** The guest virtual time when fVirtualTicking is cleared. */
339	uint64_t u64Virtual;
340	/** When the Warp drive was started or last adjusted.
341	* Only valid when fVirtualWarpDrive is set. */
342	uint64_t u64VirtualWarpDriveStart;
343	/** The previously returned nano TS.
344	* This handles TSC drift on SMP systems and expired interval.
345	* This is a valid range u64NanoTS to u64NanoTS + 1000000000 (ie. 1sec). */
346	uint64_t volatile u64VirtualRawPrev;
347	/** The ring-3 data structure for the RTTimeNanoTS workers used by tmVirtualGetRawNanoTS. */
348	RTTIMENANOTSDATAR3 VirtualGetRawDataR3;
349	/** The ring-0 data structure for the RTTimeNanoTS workers used by tmVirtualGetRawNanoTS. */
350	RTTIMENANOTSDATAR0 VirtualGetRawDataR0;
351	/** The ring-0 data structure for the RTTimeNanoTS workers used by tmVirtualGetRawNanoTS. */
352	RTTIMENANOTSDATARC VirtualGetRawDataRC;
353	/** Pointer to the ring-3 tmVirtualGetRawNanoTS worker function. */
354	R3PTRTYPE(PFNTIMENANOTSINTERNAL) pfnVirtualGetRawR3;
355	/** Pointer to the ring-3 tmVirtualGetRawNanoTS worker function. */
356	R0PTRTYPE(PFNTIMENANOTSINTERNAL) pfnVirtualGetRawR0;
357	/** Pointer to the ring-3 tmVirtualGetRawNanoTS worker function. */
358	RCPTRTYPE(PFNTIMENANOTSINTERNAL) pfnVirtualGetRawRC;
359	/** Alignment. */
360	RTRCPTR AlignmentRCPtr;
361	/** The guest virtual timer synchronous time when fVirtualSyncTicking is cleared. */
362	uint64_t volatile u64VirtualSync;
363	/** The offset of the timer synchronous virtual clock (TMCLOCK_VIRTUAL_SYNC) relative
364	* to the virtual clock (TMCLOCK_VIRTUAL).
365	* (This is accessed by the timer thread and must be updated atomically.) */
366	uint64_t volatile offVirtualSync;
367	/** The offset into offVirtualSync that's been irrevocably given up by failed catch-up attempts.
368	* Thus the current lag is offVirtualSync - offVirtualSyncGivenUp. */
369	uint64_t offVirtualSyncGivenUp;
370	/** The TMCLOCK_VIRTUAL at the previous TMVirtualGetSync call when catch-up is active. */
371	uint64_t volatile u64VirtualSyncCatchUpPrev;
372	/** The current catch-up percentage. */
373	uint32_t volatile u32VirtualSyncCatchUpPercentage;
374	/** How much slack when processing timers. */
375	uint32_t u32VirtualSyncScheduleSlack;
376	/** When to stop catch-up. */
377	uint64_t u64VirtualSyncCatchUpStopThreshold;
378	/** When to give up catch-up. */
379	uint64_t u64VirtualSyncCatchUpGiveUpThreshold;
380	/** @def TM_MAX_CATCHUP_PERIODS
381	* The number of catchup rates. */
382	#define TM_MAX_CATCHUP_PERIODS 10
383	/** The agressivness of the catch-up relative to how far we've lagged behind.
384	* The idea is to have increasing catch-up percentage as the lag increases. */
385	struct TMCATCHUPPERIOD
386	{
387	uint64_t u64Start; /*< When this period starts. (u64VirtualSyncOffset). /
388	uint32_t u32Percentage; /*< The catch-up percent to apply. /
389	uint32_t u32Alignment; /*< Structure alignment /
390	} aVirtualSyncCatchUpPeriods[TM_MAX_CATCHUP_PERIODS];
391
392	/** The UTC offset in ns.
393	* This is NOT for converting UTC to local time. It is for converting real
394	* world UTC time to VM UTC time. This feature is indented for doing date
395	* testing of software and similar.
396	* @todo Implement warpdrive on UTC. */
397	int64_t offUTC;
398
399	/** Timer queues for the different clock types - R3 Ptr */
400	R3PTRTYPE(PTMTIMERQUEUE) paTimerQueuesR3;
401	/** Timer queues for the different clock types - R0 Ptr */
402	R0PTRTYPE(PTMTIMERQUEUE) paTimerQueuesR0;
403	/** Timer queues for the different clock types - RC Ptr */
404	RCPTRTYPE(PTMTIMERQUEUE) paTimerQueuesRC;
405
406	/** Pointer to our RC mapping of the GIP. */
407	RCPTRTYPE(void *) pvGIPRC;
408	/** Pointer to our R3 mapping of the GIP. */
409	R3PTRTYPE(void *) pvGIPR3;
410
411	/** Pointer to a singly linked list of free timers.
412	* This chain is using the TMTIMER::pBigNext members.
413	* Only accessible from the emulation thread. */
414	PTMTIMERR3 pFree;
415
416	/** Pointer to a doubly linked list of created timers.
417	* This chain is using the TMTIMER::pBigNext and TMTIMER::pBigPrev members.
418	* Only accessible from the emulation thread. */
419	PTMTIMERR3 pCreated;
420
421	/** The schedulation timer timer handle (runtime timer).
422	* This timer will do freqent check on pending queue schedulations and
423	* raise VM_FF_TIMER to pull EMTs attention to them.
424	*/
425	R3PTRTYPE(PRTTIMER) pTimer;
426	/** Interval in milliseconds of the pTimer timer. */
427	uint32_t u32TimerMillies;
428
429	/** Indicates that queues are being run. */
430	bool volatile fRunningQueues;
431	/** Indicates that the virtual sync queue is being run. */
432	bool volatile fRunningVirtualSyncQueue;
433	/* Alignment */
434	bool u8Alignment[2];
435
436	/** Lock serializing access to the timer lists. */
437	PDMCRITSECT TimerCritSect;
438	/** Lock serializing access to the VirtualSync clock. */
439	PDMCRITSECT VirtualSyncLock;
440
441	/** TMR3TimerQueuesDo
442	* @{ */
443	STAMPROFILE StatDoQueues;
444	STAMPROFILEADV aStatDoQueues[TMCLOCK_MAX];
445	/** @} */
446	/** tmSchedule
447	* @{ */
448	STAMPROFILE StatScheduleOneRZ;
449	STAMPROFILE StatScheduleOneR3;
450	STAMCOUNTER StatScheduleSetFF;
451	STAMCOUNTER StatPostponedR3;
452	STAMCOUNTER StatPostponedRZ;
453	/** @} */
454	/** Read the time
455	* @{ */
456	STAMCOUNTER StatVirtualGet;
457	STAMCOUNTER StatVirtualGetSetFF;
458	STAMCOUNTER StatVirtualSyncGet;
459	STAMCOUNTER StatVirtualSyncGetELoop;
460	STAMCOUNTER StatVirtualSyncGetExpired;
461	STAMCOUNTER StatVirtualSyncGetLockless;
462	STAMCOUNTER StatVirtualSyncGetLocked;
463	STAMCOUNTER StatVirtualSyncGetSetFF;
464	STAMCOUNTER StatVirtualPause;
465	STAMCOUNTER StatVirtualResume;
466	/* @} */
467	/** TMTimerPoll
468	* @{ */
469	STAMCOUNTER StatPoll;
470	STAMCOUNTER StatPollAlreadySet;
471	STAMCOUNTER StatPollELoop;
472	STAMCOUNTER StatPollMiss;
473	STAMCOUNTER StatPollRunning;
474	STAMCOUNTER StatPollSimple;
475	STAMCOUNTER StatPollVirtual;
476	STAMCOUNTER StatPollVirtualSync;
477	/** @} */
478	/** TMTimerSet
479	* @{ */
480	STAMCOUNTER StatTimerSet;
481	STAMCOUNTER StatTimerSetOpt;
482	STAMPROFILE StatTimerSetRZ;
483	STAMPROFILE StatTimerSetR3;
484	STAMCOUNTER StatTimerSetStStopped;
485	STAMCOUNTER StatTimerSetStExpDeliver;
486	STAMCOUNTER StatTimerSetStActive;
487	STAMCOUNTER StatTimerSetStPendStop;
488	STAMCOUNTER StatTimerSetStPendStopSched;
489	STAMCOUNTER StatTimerSetStPendSched;
490	STAMCOUNTER StatTimerSetStPendResched;
491	STAMCOUNTER StatTimerSetStOther;
492	/** @} */
493	/** TMTimerSetRelative
494	* @{ */
495	STAMCOUNTER StatTimerSetRelative;
496	STAMPROFILE StatTimerSetRelativeRZ;
497	STAMPROFILE StatTimerSetRelativeR3;
498	STAMCOUNTER StatTimerSetRelativeOpt;
499	STAMCOUNTER StatTimerSetRelativeRacyVirtSync;
500	STAMCOUNTER StatTimerSetRelativeStStopped;
501	STAMCOUNTER StatTimerSetRelativeStExpDeliver;
502	STAMCOUNTER StatTimerSetRelativeStActive;
503	STAMCOUNTER StatTimerSetRelativeStPendStop;
504	STAMCOUNTER StatTimerSetRelativeStPendStopSched;
505	STAMCOUNTER StatTimerSetRelativeStPendSched;
506	STAMCOUNTER StatTimerSetRelativeStPendResched;
507	STAMCOUNTER StatTimerSetRelativeStOther;
508	/** @} */
509	/** TMTimerStop
510	* @{ */
511	STAMPROFILE StatTimerStopRZ;
512	STAMPROFILE StatTimerStopR3;
513	/** @} */
514	/** VirtualSync - Running and Catching Up
515	* @{ */
516	STAMCOUNTER StatVirtualSyncRun;
517	STAMCOUNTER StatVirtualSyncRunRestart;
518	STAMPROFILE StatVirtualSyncRunSlack;
519	STAMCOUNTER StatVirtualSyncRunStop;
520	STAMCOUNTER StatVirtualSyncRunStoppedAlready;
521	STAMCOUNTER StatVirtualSyncGiveUp;
522	STAMCOUNTER StatVirtualSyncGiveUpBeforeStarting;
523	STAMPROFILEADV StatVirtualSyncCatchup;
524	STAMCOUNTER aStatVirtualSyncCatchupInitial[TM_MAX_CATCHUP_PERIODS];
525	STAMCOUNTER aStatVirtualSyncCatchupAdjust[TM_MAX_CATCHUP_PERIODS];
526	/** @} */
527	/** TMR3VirtualSyncFF (non dedicated EMT). */
528	STAMPROFILE StatVirtualSyncFF;
529	/** The timer callback. */
530	STAMCOUNTER StatTimerCallbackSetFF;
531
532	/** Calls to TMCpuTickSet. */
533	STAMCOUNTER StatTSCSet;
534
535	/** @name Reasons for refusing TSC offsetting in TMCpuTickCanUseRealTSC.
536	* @{ */
537	STAMCOUNTER StatTSCNotFixed;
538	STAMCOUNTER StatTSCNotTicking;
539	STAMCOUNTER StatTSCCatchupLE010;
540	STAMCOUNTER StatTSCCatchupLE025;
541	STAMCOUNTER StatTSCCatchupLE100;
542	STAMCOUNTER StatTSCCatchupOther;
543	STAMCOUNTER StatTSCWarp;
544	STAMCOUNTER StatTSCUnderflow;
545	STAMCOUNTER StatTSCSyncNotTicking;
546	/** @} */
547	} TM;
548	/** Pointer to TM VM instance data. */
549	typedef TM *PTM;
550
551	/**
552	* TM VMCPU Instance data.
553	* Changes to this must checked against the padding of the tm union in VM!
554	*/
555	typedef struct TMCPU
556	{
557	/** Offset to the VMCPU structure.
558	* See TMCPU2VM(). */
559	RTUINT offVMCPU;
560
561	/** CPU timestamp ticking enabled indicator (bool). (RDTSC) */
562	bool fTSCTicking;
563	bool afAlignment0[3]; /*< alignment padding /
564
565	/** The offset between the raw TSC source and the Guest TSC.
566	* Only valid if fTicking is set and and fTSCUseRealTSC is clear. */
567	uint64_t offTSCRawSrc;
568
569	/** The guest TSC when fTicking is cleared. */
570	uint64_t u64TSC;
571
572	/** The last seen TSC by the guest. */
573	uint64_t u64TSCLastSeen;
574	} TMCPU;
575	/** Pointer to TM VMCPU instance data. */
576	typedef TMCPU *PTMCPU;
577
578	#if 0 /* enable this to rule out locking bugs on single cpu guests. */
579	# define tmTimerLock(pVM) VINF_SUCCESS
580	# define tmTimerTryLock(pVM) VINF_SUCCESS
581	# define tmTimerUnlock(pVM) ((void)0)
582	# define tmVirtualSyncLock(pVM) VINF_SUCCESS
583	# define tmVirtualSyncTryLock(pVM) VINF_SUCCESS
584	# define tmVirtualSyncUnlock(pVM) ((void)0)
585	# define TM_ASSERT_LOCK(pVM) VM_ASSERT_EMT(pVM)
586	#else
587	int tmTimerLock(PVM pVM);
588	int tmTimerTryLock(PVM pVM);
589	void tmTimerUnlock(PVM pVM);
590	/** Checks that the caller owns the timer lock. */
591	#define TM_ASSERT_LOCK(pVM) Assert(PDMCritSectIsOwner(&pVM->tm.s.TimerCritSect))
592	int tmVirtualSyncLock(PVM pVM);
593	int tmVirtualSyncTryLock(PVM pVM);
594	void tmVirtualSyncUnlock(PVM pVM);
595	#endif
596
597	const char *tmTimerState(TMTIMERSTATE enmState);
598	void tmTimerQueueSchedule(PVM pVM, PTMTIMERQUEUE pQueue);
599	#ifdef VBOX_STRICT
600	void tmTimerQueuesSanityChecks(PVM pVM, const char *pszWhere);
601	#endif
602
603	int tmCpuTickPause(PVM pVM, PVMCPU pVCpu);
604	int tmCpuTickResume(PVM pVM, PVMCPU pVCpu);
605
606	int tmVirtualPauseLocked(PVM pVM);
607	int tmVirtualResumeLocked(PVM pVM);
608	DECLEXPORT(void) tmVirtualNanoTSBad(PRTTIMENANOTSDATA pData, uint64_t u64NanoTS, uint64_t u64DeltaPrev, uint64_t u64PrevNanoTS);
609	DECLEXPORT(uint64_t) tmVirtualNanoTSRediscover(PRTTIMENANOTSDATA pData);
610
611
612	/** @} */
613
614	RT_C_DECLS_END
615
616	#endif
617

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source: vbox/trunk/src/VBox/VMM/TMInternal.h@ 29086

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