TMInternal.h@ 20374

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1	/* $Id: TMInternal.h 20374 2009-06-08 00:43:21Z 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	RT_C_DECLS_BEGIN
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	} Internal;
156
157	/** TMTIMERTYPE_EXTERNAL. */
158	struct
159	{
160	/** Callback. */
161	R3PTRTYPE(PFNTMTIMEREXT) pfnTimer;
162	} External;
163	} u;
164
165	/** Timer state. */
166	volatile TMTIMERSTATE enmState;
167	/** Timer relative offset to the next timer in the schedule list. */
168	int32_t volatile offScheduleNext;
169
170	/** Timer relative offset to the next timer in the chain. */
171	int32_t offNext;
172	/** Timer relative offset to the previous timer in the chain. */
173	int32_t offPrev;
174
175	/** User argument. */
176	RTR3PTR pvUser;
177	/** The critical section associated with the lock. */
178	R3PTRTYPE(PPDMCRITSECT) pCritSect;
179
180	/** Pointer to the next timer in the list of created or free timers. (TM::pTimers or TM::pFree) */
181	PTMTIMERR3 pBigNext;
182	/** Pointer to the previous timer in the list of all created timers. (TM::pTimers) */
183	PTMTIMERR3 pBigPrev;
184	/** Pointer to the timer description. */
185	R3PTRTYPE(const char *) pszDesc;
186	/** Pointer to the VM the timer belongs to - R3 Ptr. */
187	PVMR3 pVMR3;
188	/** Pointer to the VM the timer belongs to - R0 Ptr. */
189	PVMR0 pVMR0;
190	/** Pointer to the VM the timer belongs to - RC Ptr. */
191	PVMRC pVMRC;
192	#if HC_ARCH_BITS == 64
193	RTRCPTR padding0; /*< pad structure to multiple of 8 bytes. /
194	#endif
195	} TMTIMER;
196	AssertCompileMemberSize(TMTIMER, enmState, sizeof(uint32_t));
197
198
199	/**
200	* Updates a timer state in the correct atomic manner.
201	*/
202	#if 1
203	# define TM_SET_STATE(pTimer, state) \
204	ASMAtomicWriteU32((uint32_t volatile *)&(pTimer)->enmState, state)
205	#else
206	# define TM_SET_STATE(pTimer, state) \
207	do { \
208	uint32_t uOld1 = (pTimer)->enmState; \
209	Log(("%s: %p: %d -> %d\n", __FUNCTION__, (pTimer), (pTimer)->enmState, state)); \
210	uint32_t uOld2 = ASMAtomicXchgU32((uint32_t volatile *)&(pTimer)->enmState, state); \
211	Assert(uOld1 == uOld2); \
212	} while (0)
213	#endif
214
215	/**
216	* Tries to updates a timer state in the correct atomic manner.
217	*/
218	#if 1
219	# define TM_TRY_SET_STATE(pTimer, StateNew, StateOld, fRc) \
220	(fRc) = ASMAtomicCmpXchgU32((uint32_t volatile *)&(pTimer)->enmState, StateNew, StateOld)
221	#else
222	# define TM_TRY_SET_STATE(pTimer, StateNew, StateOld, fRc) \
223	do { (fRc) = ASMAtomicCmpXchgU32((uint32_t volatile *)&(pTimer)->enmState, StateNew, StateOld); \
224	Log(("%s: %p: %d -> %d %RTbool\n", __FUNCTION__, (pTimer), StateOld, StateNew, fRc)); \
225	} while (0)
226	#endif
227
228	/** Get the previous timer. */
229	#define TMTIMER_GET_PREV(pTimer) ((PTMTIMER)((pTimer)->offPrev ? (intptr_t)(pTimer) + (pTimer)->offPrev : 0))
230	/** Get the next timer. */
231	#define TMTIMER_GET_NEXT(pTimer) ((PTMTIMER)((pTimer)->offNext ? (intptr_t)(pTimer) + (pTimer)->offNext : 0))
232	/** Set the previous timer link. */
233	#define TMTIMER_SET_PREV(pTimer, pPrev) ((pTimer)->offPrev = (pPrev) ? (intptr_t)(pPrev) - (intptr_t)(pTimer) : 0)
234	/** Set the next timer link. */
235	#define TMTIMER_SET_NEXT(pTimer, pNext) ((pTimer)->offNext = (pNext) ? (intptr_t)(pNext) - (intptr_t)(pTimer) : 0)
236
237
238	/**
239	* A timer queue.
240	*
241	* This is allocated on the hyper heap.
242	*/
243	typedef struct TMTIMERQUEUE
244	{
245	/** The cached expire time for this queue.
246	* Updated by EMT when scheduling the queue or modifying the head timer.
247	* Assigned UINT64_MAX when there is no head timer. */
248	uint64_t u64Expire;
249	/** Doubly linked list of active timers.
250	*
251	* When no scheduling is pending, this list is will be ordered by expire time (ascending).
252	* Access is serialized by only letting the emulation thread (EMT) do changes.
253	*
254	* The offset is relative to the queue structure.
255	*/
256	int32_t offActive;
257	/** List of timers pending scheduling of some kind.
258	*
259	* Timer stats allowed in the list are TMTIMERSTATE_PENDING_STOPPING,
260	* TMTIMERSTATE_PENDING_DESTRUCTION, TMTIMERSTATE_PENDING_STOPPING_DESTRUCTION,
261	* TMTIMERSTATE_PENDING_RESCHEDULING and TMTIMERSTATE_PENDING_SCHEDULE.
262	*
263	* The offset is relative to the queue structure.
264	*/
265	int32_t volatile offSchedule;
266	/** The clock for this queue. */
267	TMCLOCK enmClock;
268	/** Pad the structure up to 32 bytes. */
269	uint32_t au32Padding[3];
270	} TMTIMERQUEUE;
271
272	/** Pointer to a timer queue. */
273	typedef TMTIMERQUEUE *PTMTIMERQUEUE;
274
275	/** Get the head of the active timer list. */
276	#define TMTIMER_GET_HEAD(pQueue) ((PTMTIMER)((pQueue)->offActive ? (intptr_t)(pQueue) + (pQueue)->offActive : 0))
277	/** Set the head of the active timer list. */
278	#define TMTIMER_SET_HEAD(pQueue, pHead) ((pQueue)->offActive = pHead ? (intptr_t)pHead - (intptr_t)(pQueue) : 0)
279
280
281	/**
282	* Converts a TM pointer into a VM pointer.
283	* @returns Pointer to the VM structure the TM is part of.
284	* @param pTM Pointer to TM instance data.
285	*/
286	#define TM2VM(pTM) ( (PVM)((char*)pTM - pTM->offVM) )
287
288
289	/**
290	* TM VM Instance data.
291	* Changes to this must checked against the padding of the cfgm union in VM!
292	*/
293	typedef struct TM
294	{
295	/** Offset to the VM structure.
296	* See TM2VM(). */
297	RTUINT offVM;
298
299	/** Set if we fully virtualize the TSC, i.e. intercept all rdtsc instructions.
300	* Config variable: TSCVirtualized (bool) */
301	bool fTSCVirtualized;
302	/** Set if we use the real TSC as time source or if we use the virtual clock.
303	* If fTSCVirtualized is set we maintain a offset to the TSC and pausing/resuming the
304	* ticking. fTSCVirtualized = false implies fTSCUseRealTSC = true.
305	* Config variable: TSCUseRealTSC (bool) */
306	bool fTSCUseRealTSC;
307	/** Flag indicating that the host TSC is suitable for use in AMD-V and VT-x mode.
308	* Config variable: MaybeUseOffsettedHostTSC (boolean) */
309	bool fMaybeUseOffsettedHostTSC;
310	/** Whether the TSC is tied to the execution of code.
311	* Config variable: TSCTiedToExecution (bool) */
312	bool fTSCTiedToExecution;
313	/** Modifier for fTSCTiedToExecution which pauses the TSC while halting if true.
314	* Config variable: TSCNotTiedToHalt (bool) */
315	bool fTSCNotTiedToHalt;
316	bool afAlignment0[2]; /*< alignment padding /
317	/** The ID of the virtual CPU that normally runs the timers. */
318	VMCPUID idTimerCpu;
319	/** The number of CPU clock ticks per second (TMCLOCK_TSC).
320	* Config variable: TSCTicksPerSecond (64-bit unsigned int)
321	* The config variable implies fTSCVirtualized = true and fTSCUseRealTSC = false. */
322	uint64_t cTSCTicksPerSecond;
323
324	/** Virtual time ticking enabled indicator (counter for each VCPU). (TMCLOCK_VIRTUAL) */
325	uint32_t volatile cVirtualTicking;
326	/** Virtual time is not running at 100%. */
327	bool fVirtualWarpDrive;
328	/** Virtual timer synchronous time ticking enabled indicator (bool). (TMCLOCK_VIRTUAL_SYNC) */
329	bool volatile fVirtualSyncTicking;
330	/** Virtual timer synchronous time catch-up active. */
331	bool volatile fVirtualSyncCatchUp;
332	bool afAlignment[5]; /*< alignment padding /
333	/** WarpDrive percentage.
334	* 100% is normal (fVirtualSyncNormal == true). When other than 100% we apply
335	* this percentage to the raw time source for the period it's been valid in,
336	* i.e. since u64VirtualWarpDriveStart. */
337	uint32_t u32VirtualWarpDrivePercentage;
338
339	/** The offset of the virtual clock relative to it's timesource.
340	* Only valid if fVirtualTicking is set. */
341	uint64_t u64VirtualOffset;
342	/** The guest virtual time when fVirtualTicking is cleared. */
343	uint64_t u64Virtual;
344	/** When the Warp drive was started or last adjusted.
345	* Only valid when fVirtualWarpDrive is set. */
346	uint64_t u64VirtualWarpDriveStart;
347	/** The previously returned nano TS.
348	* This handles TSC drift on SMP systems and expired interval.
349	* This is a valid range u64NanoTS to u64NanoTS + 1000000000 (ie. 1sec). */
350	uint64_t volatile u64VirtualRawPrev;
351	/** The ring-3 data structure for the RTTimeNanoTS workers used by tmVirtualGetRawNanoTS. */
352	RTTIMENANOTSDATAR3 VirtualGetRawDataR3;
353	/** The ring-0 data structure for the RTTimeNanoTS workers used by tmVirtualGetRawNanoTS. */
354	RTTIMENANOTSDATAR0 VirtualGetRawDataR0;
355	/** The ring-0 data structure for the RTTimeNanoTS workers used by tmVirtualGetRawNanoTS. */
356	RTTIMENANOTSDATARC VirtualGetRawDataRC;
357	/** Pointer to the ring-3 tmVirtualGetRawNanoTS worker function. */
358	R3PTRTYPE(PFNTIMENANOTSINTERNAL) pfnVirtualGetRawR3;
359	/** Pointer to the ring-3 tmVirtualGetRawNanoTS worker function. */
360	R0PTRTYPE(PFNTIMENANOTSINTERNAL) pfnVirtualGetRawR0;
361	/** Pointer to the ring-3 tmVirtualGetRawNanoTS worker function. */
362	RCPTRTYPE(PFNTIMENANOTSINTERNAL) pfnVirtualGetRawRC;
363	/** Alignment. */
364	RTRCPTR AlignmentRCPtr;
365	/** The guest virtual timer synchronous time when fVirtualSyncTicking is cleared. */
366	uint64_t volatile u64VirtualSync;
367	/** The offset of the timer synchronous virtual clock (TMCLOCK_VIRTUAL_SYNC) relative
368	* to the virtual clock (TMCLOCK_VIRTUAL).
369	* (This is accessed by the timer thread and must be updated atomically.) */
370	uint64_t volatile offVirtualSync;
371	/** The offset into offVirtualSync that's been irrevocably given up by failed catch-up attempts.
372	* Thus the current lag is offVirtualSync - offVirtualSyncGivenUp. */
373	uint64_t offVirtualSyncGivenUp;
374	/** The TMCLOCK_VIRTUAL at the previous TMVirtualGetSync call when catch-up is active. */
375	uint64_t volatile u64VirtualSyncCatchUpPrev;
376	/** The current catch-up percentage. */
377	uint32_t volatile u32VirtualSyncCatchUpPercentage;
378	/** How much slack when processing timers. */
379	uint32_t u32VirtualSyncScheduleSlack;
380	/** When to stop catch-up. */
381	uint64_t u64VirtualSyncCatchUpStopThreshold;
382	/** When to give up catch-up. */
383	uint64_t u64VirtualSyncCatchUpGiveUpThreshold;
384	/** @def TM_MAX_CATCHUP_PERIODS
385	* The number of catchup rates. */
386	#define TM_MAX_CATCHUP_PERIODS 10
387	/** The agressivness of the catch-up relative to how far we've lagged behind.
388	* The idea is to have increasing catch-up percentage as the lag increases. */
389	struct TMCATCHUPPERIOD
390	{
391	uint64_t u64Start; /*< When this period starts. (u64VirtualSyncOffset). /
392	uint32_t u32Percentage; /*< The catch-up percent to apply. /
393	uint32_t u32Alignment; /*< Structure alignment /
394	} aVirtualSyncCatchUpPeriods[TM_MAX_CATCHUP_PERIODS];
395
396	/** The UTC offset in ns.
397	* This is NOT for converting UTC to local time. It is for converting real
398	* world UTC time to VM UTC time. This feature is indented for doing date
399	* testing of software and similar.
400	* @todo Implement warpdrive on UTC. */
401	int64_t offUTC;
402
403	/** Timer queues for the different clock types - R3 Ptr */
404	R3PTRTYPE(PTMTIMERQUEUE) paTimerQueuesR3;
405	/** Timer queues for the different clock types - R0 Ptr */
406	R0PTRTYPE(PTMTIMERQUEUE) paTimerQueuesR0;
407	/** Timer queues for the different clock types - RC Ptr */
408	RCPTRTYPE(PTMTIMERQUEUE) paTimerQueuesRC;
409
410	/** Pointer to our RC mapping of the GIP. */
411	RCPTRTYPE(void *) pvGIPRC;
412	/** Pointer to our R3 mapping of the GIP. */
413	R3PTRTYPE(void *) pvGIPR3;
414
415	/** Pointer to a singly linked list of free timers.
416	* This chain is using the TMTIMER::pBigNext members.
417	* Only accessible from the emulation thread. */
418	PTMTIMERR3 pFree;
419
420	/** Pointer to a doubly linked list of created timers.
421	* This chain is using the TMTIMER::pBigNext and TMTIMER::pBigPrev members.
422	* Only accessible from the emulation thread. */
423	PTMTIMERR3 pCreated;
424
425	/** The schedulation timer timer handle (runtime timer).
426	* This timer will do freqent check on pending queue schedulations and
427	* raise VM_FF_TIMER to pull EMTs attention to them.
428	*/
429	R3PTRTYPE(PRTTIMER) pTimer;
430	/** Interval in milliseconds of the pTimer timer. */
431	uint32_t u32TimerMillies;
432
433	/** Indicates that queues are being run. */
434	bool volatile fRunningQueues;
435	/** Indicates that the virtual sync queue is being run. */
436	bool volatile fRunningVirtualSyncQueue;
437	/* Alignment */
438	bool u8Alignment[2];
439
440	/** Lock serializing EMT access to TM. */
441	PDMCRITSECT EmtLock;
442	/** Lock serializing access to the VirtualSync clock. */
443	PDMCRITSECT VirtualSyncLock;
444
445	/** TMR3TimerQueuesDo
446	* @{ */
447	STAMPROFILE StatDoQueues;
448	STAMPROFILEADV aStatDoQueues[TMCLOCK_MAX];
449	/** @} */
450	/** tmSchedule
451	* @{ */
452	STAMPROFILE StatScheduleOneRZ;
453	STAMPROFILE StatScheduleOneR3;
454	STAMCOUNTER StatScheduleSetFF;
455	STAMCOUNTER StatPostponedR3;
456	STAMCOUNTER StatPostponedRZ;
457	/** @} */
458	/** Read the time
459	* @{ */
460	STAMCOUNTER StatVirtualGet;
461	STAMCOUNTER StatVirtualGetSetFF;
462	STAMCOUNTER StatVirtualSyncGet;
463	STAMCOUNTER StatVirtualSyncGetELoop;
464	STAMCOUNTER StatVirtualSyncGetExpired;
465	STAMCOUNTER StatVirtualSyncGetLockless;
466	STAMCOUNTER StatVirtualSyncGetLocked;
467	STAMCOUNTER StatVirtualSyncGetSetFF;
468	STAMCOUNTER StatVirtualPause;
469	STAMCOUNTER StatVirtualResume;
470	/* @} */
471	/** TMTimerPoll
472	* @{ */
473	STAMCOUNTER StatPoll;
474	STAMCOUNTER StatPollAlreadySet;
475	STAMCOUNTER StatPollELoop;
476	STAMCOUNTER StatPollMiss;
477	STAMCOUNTER StatPollRunning;
478	STAMCOUNTER StatPollSimple;
479	STAMCOUNTER StatPollVirtual;
480	STAMCOUNTER StatPollVirtualSync;
481	/** @} */
482	/** TMTimerSet
483	* @{ */
484	STAMPROFILE StatTimerSetRZ;
485	STAMPROFILE StatTimerSetR3;
486	/** @} */
487	/** TMTimerStop
488	* @{ */
489	STAMPROFILE StatTimerStopRZ;
490	STAMPROFILE StatTimerStopR3;
491	/** @} */
492	/** VirtualSync - Running and Catching Up
493	* @{ */
494	STAMCOUNTER StatVirtualSyncRun;
495	STAMCOUNTER StatVirtualSyncRunRestart;
496	STAMPROFILE StatVirtualSyncRunSlack;
497	STAMCOUNTER StatVirtualSyncRunStop;
498	STAMCOUNTER StatVirtualSyncRunStoppedAlready;
499	STAMCOUNTER StatVirtualSyncGiveUp;
500	STAMCOUNTER StatVirtualSyncGiveUpBeforeStarting;
501	STAMPROFILEADV StatVirtualSyncCatchup;
502	STAMCOUNTER aStatVirtualSyncCatchupInitial[TM_MAX_CATCHUP_PERIODS];
503	STAMCOUNTER aStatVirtualSyncCatchupAdjust[TM_MAX_CATCHUP_PERIODS];
504	/** @} */
505	/** TMR3VirtualSyncFF (non dedicated EMT). */
506	STAMPROFILE StatVirtualSyncFF;
507	/** The timer callback. */
508	STAMCOUNTER StatTimerCallbackSetFF;
509
510	/** @name Reasons for refusing TSC offsetting in TMCpuTickCanUseRealTSC.
511	* @{ */
512	STAMCOUNTER StatTSCNotFixed;
513	STAMCOUNTER StatTSCNotTicking;
514	STAMCOUNTER StatTSCCatchupLE010;
515	STAMCOUNTER StatTSCCatchupLE025;
516	STAMCOUNTER StatTSCCatchupLE100;
517	STAMCOUNTER StatTSCCatchupOther;
518	STAMCOUNTER StatTSCWarp;
519	STAMCOUNTER StatTSCSyncNotTicking;
520	/** @} */
521	} TM;
522	/** Pointer to TM VM instance data. */
523	typedef TM *PTM;
524
525	/**
526	* TM VMCPU Instance data.
527	* Changes to this must checked against the padding of the tm union in VM!
528	*/
529	typedef struct TMCPU
530	{
531	/** Offset to the VMCPU structure.
532	* See TMCPU2VM(). */
533	RTUINT offVMCPU;
534
535	/** CPU timestamp ticking enabled indicator (bool). (RDTSC) */
536	bool fTSCTicking;
537	bool afAlignment0[3]; /*< alignment padding /
538
539	/** The offset between the host TSC and the Guest TSC.
540	* Only valid if fTicking is set and and fTSCUseRealTSC is clear. */
541	uint64_t u64TSCOffset;
542
543	/** The guest TSC when fTicking is cleared. */
544	uint64_t u64TSC;
545
546	} TMCPU;
547	/** Pointer to TM VMCPU instance data. */
548	typedef TMCPU *PTMCPU;
549
550	#if 0 /* enable this to rule out locking bugs on single cpu guests. */
551	# define tmLock(pVM) VINF_SUCCESS
552	# define tmTryLock(pVM) VINF_SUCCESS
553	# define tmUnlock(pVM) ((void)0)
554	# define tmVirtualSyncLock(pVM) VINF_SUCCESS
555	# define tmVirtualSyncTryLock(pVM) VINF_SUCCESS
556	# define tmVirtualSyncUnlock(pVM) ((void)0)
557	# define TM_ASSERT_EMT_LOCK(pVM) VM_ASSERT_EMT(pVM)
558	#else
559	int tmLock(PVM pVM);
560	int tmTryLock(PVM pVM);
561	void tmUnlock(PVM pVM);
562	/** Checks that the caller owns the EMT lock. */
563	#define TM_ASSERT_EMT_LOCK(pVM) Assert(PDMCritSectIsOwner(&pVM->tm.s.EmtLock))
564	int tmVirtualSyncLock(PVM pVM);
565	int tmVirtualSyncTryLock(PVM pVM);
566	void tmVirtualSyncUnlock(PVM pVM);
567	#endif
568
569	const char *tmTimerState(TMTIMERSTATE enmState);
570	void tmTimerQueueSchedule(PVM pVM, PTMTIMERQUEUE pQueue);
571	#ifdef VBOX_STRICT
572	void tmTimerQueuesSanityChecks(PVM pVM, const char *pszWhere);
573	#endif
574
575	int tmCpuTickPause(PVM pVM, PVMCPU pVCpu);
576	int tmCpuTickResume(PVM pVM, PVMCPU pVCpu);
577
578	int tmVirtualPauseLocked(PVM pVM);
579	int tmVirtualResumeLocked(PVM pVM);
580	DECLEXPORT(void) tmVirtualNanoTSBad(PRTTIMENANOTSDATA pData, uint64_t u64NanoTS, uint64_t u64DeltaPrev, uint64_t u64PrevNanoTS);
581	DECLEXPORT(uint64_t) tmVirtualNanoTSRediscover(PRTTIMENANOTSDATA pData);
582
583
584	/** @} */
585
586	RT_C_DECLS_END
587
588	#endif
589

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Last change on this file since 20374 was 20374, checked in by vboxsync, 15 years ago
*: s/RT_\(BEGIN\|END\)_DECLS/RT_C_DECLS_\1/g
Property svn:eol-style set to `native` Property svn:keywords set to `Id`
File size: 23.2 KB

source: vbox/trunk/src/VBox/VMM/TMInternal.h@ 20374

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