VirtualBox

source: vbox/trunk/src/VBox/VMM/TMInternal.h@ 28800

Last change on this file since 28800 was 28800, checked in by vboxsync, 14 years ago

Automated rebranding to Oracle copyright/license strings via filemuncher
  • Property svn:eol-style set to native
  • Property svn:keywords set to Id
File size: 24.6 KB
Line 
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
29RT_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 */
47typedef 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 */
62typedef 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 */
117typedef 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;
192AssertCompileMemberSize(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 */
239typedef 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. */
269typedef 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 */
289typedef 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. */
549typedef 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 */
555typedef 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. */
576typedef 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
587int tmTimerLock(PVM pVM);
588int tmTimerTryLock(PVM pVM);
589void tmTimerUnlock(PVM pVM);
590/** Checks that the caller owns the timer lock. */
591#define TM_ASSERT_LOCK(pVM) Assert(PDMCritSectIsOwner(&pVM->tm.s.TimerCritSect))
592int tmVirtualSyncLock(PVM pVM);
593int tmVirtualSyncTryLock(PVM pVM);
594void tmVirtualSyncUnlock(PVM pVM);
595#endif
596
597const char *tmTimerState(TMTIMERSTATE enmState);
598void tmTimerQueueSchedule(PVM pVM, PTMTIMERQUEUE pQueue);
599#ifdef VBOX_STRICT
600void tmTimerQueuesSanityChecks(PVM pVM, const char *pszWhere);
601#endif
602
603int tmCpuTickPause(PVM pVM, PVMCPU pVCpu);
604int tmCpuTickResume(PVM pVM, PVMCPU pVCpu);
605
606int tmVirtualPauseLocked(PVM pVM);
607int tmVirtualResumeLocked(PVM pVM);
608DECLEXPORT(void) tmVirtualNanoTSBad(PRTTIMENANOTSDATA pData, uint64_t u64NanoTS, uint64_t u64DeltaPrev, uint64_t u64PrevNanoTS);
609DECLEXPORT(uint64_t) tmVirtualNanoTSRediscover(PRTTIMENANOTSDATA pData);
610
611
612/** @} */
613
614RT_C_DECLS_END
615
616#endif
617
Note: See TracBrowser for help on using the repository browser.

© 2023 Oracle
Contact – Privacy policy – Terms of Use