TMInternal.h@ 106695

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1	/* $Id: TMInternal.h 106061 2024-09-16 14:03:52Z vboxsync $ */
2	/** @file
3	* TM - Internal header file.
4	*/
5
6	/*
7	* Copyright (C) 2006-2024 Oracle and/or its affiliates.
8	*
9	* This file is part of VirtualBox base platform packages, as
10	* available from https://www.virtualbox.org.
11	*
12	* This program is free software; you can redistribute it and/or
13	* modify it under the terms of the GNU General Public License
14	* as published by the Free Software Foundation, in version 3 of the
15	* License.
16	*
17	* This program is distributed in the hope that it will be useful, but
18	* WITHOUT ANY WARRANTY; without even the implied warranty of
19	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20	* General Public License for more details.
21	*
22	* You should have received a copy of the GNU General Public License
23	* along with this program; if not, see <https://www.gnu.org/licenses>.
24	*
25	* SPDX-License-Identifier: GPL-3.0-only
26	*/
27
28	#ifndef VMM_INCLUDED_SRC_include_TMInternal_h
29	#define VMM_INCLUDED_SRC_include_TMInternal_h
30	#ifndef RT_WITHOUT_PRAGMA_ONCE
31	# pragma once
32	#endif
33
34	#include <VBox/cdefs.h>
35	#include <VBox/types.h>
36	#include <iprt/time.h>
37	#include <iprt/timer.h>
38	#include <iprt/assert.h>
39	#include <VBox/vmm/stam.h>
40	#include <VBox/vmm/pdmcritsect.h>
41	#include <VBox/vmm/pdmcritsectrw.h>
42
43	RT_C_DECLS_BEGIN
44
45
46	/** @defgroup grp_tm_int Internal
47	* @ingroup grp_tm
48	* @internal
49	* @{
50	*/
51
52	/** Frequency of the real clock. */
53	#define TMCLOCK_FREQ_REAL UINT32_C(1000)
54	/** Frequency of the virtual clock. */
55	#define TMCLOCK_FREQ_VIRTUAL UINT32_C(1000000000)
56
57	/** @def TM_SECONDS_TO_AUTOMATIC_POWER_OFF
58	* Powers off the VM automatically after the defined number of seconds.
59	* This is for debugging only. */
60	#if defined(DOXYGEN_RUNNING) \|\| 0
61	# define TM_SECONDS_TO_AUTOMATIC_POWER_OFF 45
62	#endif
63
64	/**
65	* Timer type.
66	*/
67	typedef enum TMTIMERTYPE
68	{
69	/** Invalid zero value. */
70	TMTIMERTYPE_INVALID = 0,
71	/** Device timer. */
72	TMTIMERTYPE_DEV,
73	/** USB device timer. */
74	TMTIMERTYPE_USB,
75	/** Driver timer. */
76	TMTIMERTYPE_DRV,
77	/** Internal timer . */
78	TMTIMERTYPE_INTERNAL
79	} TMTIMERTYPE;
80
81	/**
82	* Timer state
83	*/
84	typedef enum TMTIMERSTATE
85	{
86	/** Invalid zero entry (used for table entry zero). */
87	TMTIMERSTATE_INVALID = 0,
88	/** Timer is stopped. */
89	TMTIMERSTATE_STOPPED,
90	/** Timer is active. */
91	TMTIMERSTATE_ACTIVE,
92	/** Timer is expired, getting expire and unlinking. */
93	TMTIMERSTATE_EXPIRED_GET_UNLINK,
94	/** Timer is expired and is being delivered. */
95	TMTIMERSTATE_EXPIRED_DELIVER,
96
97	/** Timer is stopped but still in the active list.
98	* Currently in the ScheduleTimers list. */
99	TMTIMERSTATE_PENDING_STOP,
100	/** Timer is stopped but needs unlinking from the ScheduleTimers list.
101	* Currently in the ScheduleTimers list. */
102	TMTIMERSTATE_PENDING_STOP_SCHEDULE,
103	/** Timer is being modified and will soon be pending scheduling.
104	* Currently in the ScheduleTimers list. */
105	TMTIMERSTATE_PENDING_SCHEDULE_SET_EXPIRE,
106	/** Timer is pending scheduling.
107	* Currently in the ScheduleTimers list. */
108	TMTIMERSTATE_PENDING_SCHEDULE,
109	/** Timer is being modified and will soon be pending rescheduling.
110	* Currently in the ScheduleTimers list and the active list. */
111	TMTIMERSTATE_PENDING_RESCHEDULE_SET_EXPIRE,
112	/** Timer is modified and is now pending rescheduling.
113	* Currently in the ScheduleTimers list and the active list. */
114	TMTIMERSTATE_PENDING_RESCHEDULE,
115	/** Timer is being destroyed. */
116	TMTIMERSTATE_DESTROY,
117	/** Timer is free. */
118	TMTIMERSTATE_FREE
119	} TMTIMERSTATE;
120
121	/** Predicate that returns true if the give state is pending scheduling or
122	* rescheduling of any kind. Will reference the argument more than once! */
123	#define TMTIMERSTATE_IS_PENDING_SCHEDULING(enmState) \
124	( (enmState) <= TMTIMERSTATE_PENDING_RESCHEDULE \
125	&& (enmState) >= TMTIMERSTATE_PENDING_SCHEDULE_SET_EXPIRE)
126
127	/** @name Timer handle value elements
128	* @{ */
129	#define TMTIMERHANDLE_RANDOM_MASK UINT64_C(0xffffffffff000000)
130	#define TMTIMERHANDLE_QUEUE_IDX_SHIFT 16
131	#define TMTIMERHANDLE_QUEUE_IDX_MASK UINT64_C(0x0000000000ff0000)
132	#define TMTIMERHANDLE_QUEUE_IDX_SMASK UINT64_C(0x00000000000000ff)
133	#define TMTIMERHANDLE_TIMER_IDX_MASK UINT64_C(0x000000000000ffff)
134	/** @} */
135
136
137	/**
138	* Internal representation of a timer.
139	*
140	* For correct serialization (without the use of semaphores and
141	* other blocking/slow constructs) certain rules applies to updating
142	* this structure:
143	* - For thread other than EMT only u64Expire, enmState and pScheduleNext*
144	* are changeable. Everything else is out of bounds.
145	* - Updating of u64Expire timer can only happen in the TMTIMERSTATE_STOPPED
146	* and TMTIMERSTATE_PENDING_RESCHEDULING_SET_EXPIRE states.
147	* - Timers in the TMTIMERSTATE_EXPIRED state are only accessible from EMT.
148	* - Actual destruction of a timer can only be done at scheduling time.
149	*/
150	typedef struct TMTIMER
151	{
152	/** Expire time. */
153	volatile uint64_t u64Expire;
154
155	/** Timer state. */
156	volatile TMTIMERSTATE enmState;
157	/** The index of the next next timer in the schedule list. */
158	uint32_t volatile idxScheduleNext;
159
160	/** The index of the next timer in the chain. */
161	uint32_t idxNext;
162	/** The index of the previous timer in the chain. */
163	uint32_t idxPrev;
164
165	/** The timer frequency hint. This is 0 if not hint was given. */
166	uint32_t volatile uHzHint;
167	/** Timer callback type. */
168	TMTIMERTYPE enmType;
169
170	/** It's own handle value. */
171	TMTIMERHANDLE hSelf;
172	/** TMTIMER_FLAGS_XXX. */
173	uint32_t fFlags;
174	/** Explicit alignment padding. */
175	uint32_t u32Alignment;
176
177	/** User argument. */
178	RTR3PTR pvUser;
179	/** The critical section associated with the lock. */
180	R3PTRTYPE(PPDMCRITSECT) pCritSect;
181
182	/* --- new cache line (64-bit / 64 bytes) --- */
183
184	/** Type specific data. */
185	union
186	{
187	/** TMTIMERTYPE_DEV. */
188	struct
189	{
190	/** Callback. */
191	R3PTRTYPE(PFNTMTIMERDEV) pfnTimer;
192	/** Device instance. */
193	PPDMDEVINSR3 pDevIns;
194	} Dev;
195
196	/** TMTIMERTYPE_DEV. */
197	struct
198	{
199	/** Callback. */
200	R3PTRTYPE(PFNTMTIMERUSB) pfnTimer;
201	/** USB device instance. */
202	PPDMUSBINS pUsbIns;
203	} Usb;
204
205	/** TMTIMERTYPE_DRV. */
206	struct
207	{
208	/** Callback. */
209	R3PTRTYPE(PFNTMTIMERDRV) pfnTimer;
210	/** Device instance. */
211	R3PTRTYPE(PPDMDRVINS) pDrvIns;
212	} Drv;
213
214	/** TMTIMERTYPE_INTERNAL. */
215	struct
216	{
217	/** Callback. */
218	R3PTRTYPE(PFNTMTIMERINT) pfnTimer;
219	} Internal;
220	} u;
221
222	/** The timer name. */
223	char szName[32];
224
225	/** @todo think of two useful release statistics counters here to fill up the
226	* cache line. */
227	#ifndef VBOX_WITH_STATISTICS
228	uint64_t auAlignment2[2];
229	#else
230	STAMPROFILE StatTimer;
231	STAMPROFILE StatCritSectEnter;
232	STAMCOUNTER StatGet;
233	STAMCOUNTER StatSetAbsolute;
234	STAMCOUNTER StatSetRelative;
235	STAMCOUNTER StatStop;
236	uint64_t auAlignment2[6];
237	#endif
238	} TMTIMER;
239	AssertCompileMemberSize(TMTIMER, u64Expire, sizeof(uint64_t));
240	AssertCompileMemberSize(TMTIMER, enmState, sizeof(uint32_t));
241	AssertCompileSizeAlignment(TMTIMER, 64);
242
243
244	/**
245	* Updates a timer state in the correct atomic manner.
246	*/
247	#if 1
248	# define TM_SET_STATE(pTimer, state) \
249	ASMAtomicWriteU32((uint32_t volatile *)&(pTimer)->enmState, state)
250	#else
251	# define TM_SET_STATE(pTimer, state) \
252	do { \
253	uint32_t uOld1 = (pTimer)->enmState; \
254	Log(("%s: %p: %d -> %d\n", __FUNCTION__, (pTimer), (pTimer)->enmState, state)); \
255	uint32_t uOld2 = ASMAtomicXchgU32((uint32_t volatile *)&(pTimer)->enmState, state); \
256	Assert(uOld1 == uOld2); \
257	} while (0)
258	#endif
259
260	/**
261	* Tries to updates a timer state in the correct atomic manner.
262	*/
263	#if 1
264	# define TM_TRY_SET_STATE(pTimer, StateNew, StateOld, fRc) \
265	(fRc) = ASMAtomicCmpXchgU32((uint32_t volatile *)&(pTimer)->enmState, StateNew, StateOld)
266	#else
267	# define TM_TRY_SET_STATE(pTimer, StateNew, StateOld, fRc) \
268	do { (fRc) = ASMAtomicCmpXchgU32((uint32_t volatile *)&(pTimer)->enmState, StateNew, StateOld); \
269	Log(("%s: %p: %d -> %d %RTbool\n", __FUNCTION__, (pTimer), StateOld, StateNew, fRc)); \
270	} while (0)
271	#endif
272
273
274	/**
275	* A timer queue, shared.
276	*/
277	typedef struct TMTIMERQUEUE
278	{
279	/** The ring-0 mapping of the timer table. */
280	R3PTRTYPE(PTMTIMER) paTimers;
281
282	/** The cached expire time for this queue.
283	* Updated by EMT when scheduling the queue or modifying the head timer.
284	* Assigned UINT64_MAX when there is no head timer. */
285	uint64_t u64Expire;
286	/** Doubly linked list of active timers.
287	*
288	* When no scheduling is pending, this list is will be ordered by expire time (ascending).
289	* Access is serialized by only letting the emulation thread (EMT) do changes.
290	*/
291	uint32_t idxActive;
292	/** List of timers pending scheduling of some kind.
293	*
294	* Timer stats allowed in the list are TMTIMERSTATE_PENDING_STOPPING,
295	* TMTIMERSTATE_PENDING_DESTRUCTION, TMTIMERSTATE_PENDING_STOPPING_DESTRUCTION,
296	* TMTIMERSTATE_PENDING_RESCHEDULING and TMTIMERSTATE_PENDING_SCHEDULE.
297	*/
298	uint32_t volatile idxSchedule;
299	/** The clock for this queue. */
300	TMCLOCK enmClock; /*< @todo consider duplicating this in TMTIMERQUEUER0 for better cache locality (paTimers). /
301
302	/** The size of the paTimers allocation (in entries). */
303	uint32_t cTimersAlloc;
304	/** Number of free timer entries. */
305	uint32_t cTimersFree;
306	/** Where to start looking for free timers. */
307	uint32_t idxFreeHint;
308	/** The queue name. */
309	char szName[16];
310	/** Set when a thread is doing scheduling and callback. */
311	bool volatile fBeingProcessed;
312	/** Set if we've disabled growing. */
313	bool fCannotGrow;
314	/** Align on 64-byte boundrary. */
315	bool afAlignment1[2];
316	/** The current max timer Hz hint. */
317	uint32_t volatile uMaxHzHint;
318
319	/* --- new cache line (64-bit / 64 bytes) --- */
320
321	/** Time spent doing scheduling and timer callbacks. */
322	STAMPROFILE StatDo;
323	/** The thread servicing this queue, NIL if none. */
324	R3PTRTYPE(RTTHREAD) hThread;
325	/** The handle to the event semaphore the worker thread sleeps on. */
326	SUPSEMEVENT hWorkerEvt;
327	/** Absolute sleep deadline for the worker (enmClock time). */
328	uint64_t volatile tsWorkerWakeup;
329	uint64_t u64Alignment2;
330
331	/** Lock serializing the active timer list and associated work. */
332	PDMCRITSECT TimerLock;
333	/** Lock serializing timer allocation and deallocation.
334	* @note This may be used in read-mode all over the place if we later
335	* implement runtime array growing. */
336	PDMCRITSECTRW AllocLock;
337	} TMTIMERQUEUE;
338	AssertCompileMemberAlignment(TMTIMERQUEUE, AllocLock, 64);
339	AssertCompileSizeAlignment(TMTIMERQUEUE, 64);
340	/** Pointer to a timer queue. */
341	typedef TMTIMERQUEUE *PTMTIMERQUEUE;
342
343	/**
344	* A timer queue, ring-0 only bits.
345	*/
346	typedef struct TMTIMERQUEUER0
347	{
348	/** The size of the paTimers allocation (in entries). */
349	uint32_t cTimersAlloc;
350	uint32_t uAlignment;
351	/** The ring-0 mapping of the timer table. */
352	R0PTRTYPE(PTMTIMER) paTimers;
353	/** Handle to the timer table allocation. */
354	RTR0MEMOBJ hMemObj;
355	/** Handle to the ring-3 mapping of the timer table. */
356	RTR0MEMOBJ hMapObj;
357	} TMTIMERQUEUER0;
358	/** Pointer to the ring-0 timer queue data. */
359	typedef TMTIMERQUEUER0 *PTMTIMERQUEUER0;
360
361	/** Pointer to the current context data for a timer queue.
362	* @note In ring-3 this is the same as the shared data. */
363	#ifdef IN_RING3
364	typedef TMTIMERQUEUE *PTMTIMERQUEUECC;
365	#else
366	typedef TMTIMERQUEUER0 *PTMTIMERQUEUECC;
367	#endif
368	/** Helper macro for getting the current context queue point. */
369	#ifdef IN_RING3
370	# define TM_GET_TIMER_QUEUE_CC(a_pVM, a_idxQueue, a_pQueueShared) (a_pQueueShared)
371	#else
372	# define TM_GET_TIMER_QUEUE_CC(a_pVM, a_idxQueue, a_pQueueShared) (&(a_pVM)->tmr0.s.aTimerQueues[a_idxQueue])
373	#endif
374
375
376	/**
377	* CPU load data set.
378	* Mainly used by tmR3CpuLoadTimer.
379	*/
380	typedef struct TMCPULOADSTATE
381	{
382	/** The percent of the period spent executing guest code. */
383	uint8_t cPctExecuting;
384	/** The percent of the period spent halted. */
385	uint8_t cPctHalted;
386	/** The percent of the period spent on other things. */
387	uint8_t cPctOther;
388	/** Explicit alignment padding */
389	uint8_t au8Alignment[1];
390	/** Index into aHistory of the current entry. */
391	uint16_t volatile idxHistory;
392	/** Number of valid history entries before idxHistory. */
393	uint16_t volatile cHistoryEntries;
394
395	/** Previous cNsTotal value. */
396	uint64_t cNsPrevTotal;
397	/** Previous cNsExecuting value. */
398	uint64_t cNsPrevExecuting;
399	/** Previous cNsHalted value. */
400	uint64_t cNsPrevHalted;
401	/** Data for the last 30 min (given an interval of 1 second). */
402	struct
403	{
404	uint8_t cPctExecuting;
405	/** The percent of the period spent halted. */
406	uint8_t cPctHalted;
407	/** The percent of the period spent on other things. */
408	uint8_t cPctOther;
409	} aHistory[30*60];
410	} TMCPULOADSTATE;
411	AssertCompileSizeAlignment(TMCPULOADSTATE, 8);
412	AssertCompileMemberAlignment(TMCPULOADSTATE, cNsPrevTotal, 8);
413	/** Pointer to a CPU load data set. */
414	typedef TMCPULOADSTATE *PTMCPULOADSTATE;
415
416
417	/**
418	* TSC mode.
419	*
420	* The main modes of how TM implements the TSC clock (TMCLOCK_TSC).
421	*/
422	typedef enum TMTSCMODE
423	{
424	/** The guest TSC is an emulated, virtual TSC. */
425	TMTSCMODE_VIRT_TSC_EMULATED = 1,
426	/** The guest TSC is an offset of the real TSC. */
427	TMTSCMODE_REAL_TSC_OFFSET,
428	/** The guest TSC is dynamically derived through emulating or offsetting. */
429	TMTSCMODE_DYNAMIC,
430	/** The native API provides it. */
431	TMTSCMODE_NATIVE_API
432	} TMTSCMODE;
433	AssertCompileSize(TMTSCMODE, sizeof(uint32_t));
434
435
436	/**
437	* TM VM Instance data.
438	* Changes to this must checked against the padding of the cfgm union in VM!
439	*/
440	typedef struct TM
441	{
442	/** Timer queues for the different clock types.
443	* @note is first in the structure to ensure cache-line alignment. */
444	TMTIMERQUEUE aTimerQueues[TMCLOCK_MAX];
445
446	/** The current TSC mode of the VM.
447	* Config variable: Mode (string). */
448	TMTSCMODE enmTSCMode;
449	/** The original TSC mode of the VM. */
450	TMTSCMODE enmOriginalTSCMode;
451	/** Whether the TSC is tied to the execution of code.
452	* Config variable: TSCTiedToExecution (bool) */
453	bool fTSCTiedToExecution;
454	/** Modifier for fTSCTiedToExecution which pauses the TSC while halting if true.
455	* Config variable: TSCNotTiedToHalt (bool) */
456	bool fTSCNotTiedToHalt;
457	/** Whether TM TSC mode switching is allowed at runtime. */
458	bool fTSCModeSwitchAllowed;
459	/** Whether the guest has enabled use of paravirtualized TSC. */
460	bool fParavirtTscEnabled;
461	/** The ID of the virtual CPU that normally runs the timers. */
462	VMCPUID idTimerCpu;
463
464	/** The number of CPU clock ticks per seconds of the host CPU. */
465	uint64_t cTSCTicksPerSecondHost;
466	/** The number of CPU clock ticks per second (TMCLOCK_TSC).
467	* Config variable: TSCTicksPerSecond (64-bit unsigned int)
468	* The config variable implies @c enmTSCMode would be
469	* TMTSCMODE_VIRT_TSC_EMULATED. */
470	uint64_t cTSCTicksPerSecond;
471	/** The TSC difference introduced by pausing the VM. */
472	uint64_t offTSCPause;
473	/** The TSC value when the last TSC was paused. */
474	uint64_t u64LastPausedTSC;
475	/** CPU TSCs ticking indicator (one for each VCPU). */
476	uint32_t volatile cTSCsTicking;
477
478	/** Virtual time ticking enabled indicator (counter for each VCPU). (TMCLOCK_VIRTUAL) */
479	uint32_t volatile cVirtualTicking;
480	/** Virtual time is not running at 100%. */
481	bool fVirtualWarpDrive;
482	/** Virtual timer synchronous time ticking enabled indicator (bool). (TMCLOCK_VIRTUAL_SYNC) */
483	bool volatile fVirtualSyncTicking;
484	/** Virtual timer synchronous time catch-up active. */
485	bool volatile fVirtualSyncCatchUp;
486	/** The multiplier for TSC. */
487	uint8_t u8TSCMultiplier;
488	/** WarpDrive percentage.
489	* 100% is normal (fVirtualSyncNormal == true). When other than 100% we apply
490	* this percentage to the raw time source for the period it's been valid in,
491	* i.e. since u64VirtualWarpDriveStart. */
492	uint32_t u32VirtualWarpDrivePercentage;
493
494	/** The offset of the virtual clock relative to it's timesource.
495	* Only valid if fVirtualTicking is set. */
496	uint64_t u64VirtualOffset;
497	/** The guest virtual time when fVirtualTicking is cleared. */
498	uint64_t u64Virtual;
499	/** When the Warp drive was started or last adjusted.
500	* Only valid when fVirtualWarpDrive is set. */
501	uint64_t u64VirtualWarpDriveStart;
502	/** The previously returned nano TS.
503	* This handles TSC drift on SMP systems and expired interval.
504	* This is a valid range u64NanoTS to u64NanoTS + 1000000000 (ie. 1sec). */
505	uint64_t volatile u64VirtualRawPrev;
506	/** The ring-3 data structure for the RTTimeNanoTS workers used by tmVirtualGetRawNanoTS. */
507	RTTIMENANOTSDATAR3 VirtualGetRawData;
508	/** Pointer to the ring-3 tmVirtualGetRawNanoTS worker function. */
509	R3PTRTYPE(PFNTIMENANOTSINTERNAL) pfnVirtualGetRaw;
510	/** The guest virtual timer synchronous time when fVirtualSyncTicking is cleared.
511	* When fVirtualSyncTicking is set it holds the last time returned to
512	* the guest (while the lock was held). */
513	uint64_t volatile u64VirtualSync;
514	/** The offset of the timer synchronous virtual clock (TMCLOCK_VIRTUAL_SYNC) relative
515	* to the virtual clock (TMCLOCK_VIRTUAL).
516	* (This is accessed by the timer thread and must be updated atomically.) */
517	uint64_t volatile offVirtualSync;
518	/** The offset into offVirtualSync that's been irrevocably given up by failed catch-up attempts.
519	* Thus the current lag is offVirtualSync - offVirtualSyncGivenUp. */
520	uint64_t offVirtualSyncGivenUp;
521	/** The TMCLOCK_VIRTUAL at the previous TMVirtualGetSync call when catch-up is active. */
522	uint64_t volatile u64VirtualSyncCatchUpPrev;
523	/** The current catch-up percentage. */
524	uint32_t volatile u32VirtualSyncCatchUpPercentage;
525	/** How much slack when processing timers. */
526	uint32_t u32VirtualSyncScheduleSlack;
527	/** When to stop catch-up. */
528	uint64_t u64VirtualSyncCatchUpStopThreshold;
529	/** When to give up catch-up. */
530	uint64_t u64VirtualSyncCatchUpGiveUpThreshold;
531	/** @def TM_MAX_CATCHUP_PERIODS
532	* The number of catchup rates. */
533	#define TM_MAX_CATCHUP_PERIODS 10
534	/** The aggressiveness of the catch-up relative to how far we've lagged behind.
535	* The idea is to have increasing catch-up percentage as the lag increases. */
536	struct TMCATCHUPPERIOD
537	{
538	uint64_t u64Start; /*< When this period starts. (u64VirtualSyncOffset). /
539	uint32_t u32Percentage; /*< The catch-up percent to apply. /
540	uint32_t u32Alignment; /*< Structure alignment /
541	} aVirtualSyncCatchUpPeriods[TM_MAX_CATCHUP_PERIODS];
542
543	union
544	{
545	/** Combined value for updating. */
546	uint64_t volatile u64Combined;
547	struct
548	{
549	/** Bitmap indicating which timer queues needs their uMaxHzHint updated. */
550	uint32_t volatile bmNeedsUpdating;
551	/** The current max timer Hz hint. */
552	uint32_t volatile uMax;
553	} s;
554	} HzHint;
555	/** @cfgm{/TM/HostHzMax, uint32_t, Hz, 0, UINT32_MAX, 20000}
556	* The max host Hz frequency hint returned by TMCalcHostTimerFrequency. */
557	uint32_t cHostHzMax;
558	/** @cfgm{/TM/HostHzFudgeFactorTimerCpu, uint32_t, Hz, 0, UINT32_MAX, 111}
559	* The number of Hz TMCalcHostTimerFrequency adds for the timer CPU. */
560	uint32_t cPctHostHzFudgeFactorTimerCpu;
561	/** @cfgm{/TM/HostHzFudgeFactorOtherCpu, uint32_t, Hz, 0, UINT32_MAX, 110}
562	* The number of Hz TMCalcHostTimerFrequency adds for the other CPUs. */
563	uint32_t cPctHostHzFudgeFactorOtherCpu;
564	/** @cfgm{/TM/HostHzFudgeFactorCatchUp100, uint32_t, Hz, 0, UINT32_MAX, 300}
565	* The fudge factor (expressed in percent) that catch-up percentages below
566	* 100% is multiplied by. */
567	uint32_t cPctHostHzFudgeFactorCatchUp100;
568	/** @cfgm{/TM/HostHzFudgeFactorCatchUp200, uint32_t, Hz, 0, UINT32_MAX, 250}
569	* The fudge factor (expressed in percent) that catch-up percentages
570	* 100%-199% is multiplied by. */
571	uint32_t cPctHostHzFudgeFactorCatchUp200;
572	/** @cfgm{/TM/HostHzFudgeFactorCatchUp400, uint32_t, Hz, 0, UINT32_MAX, 200}
573	* The fudge factor (expressed in percent) that catch-up percentages
574	* 200%-399% is multiplied by. */
575	uint32_t cPctHostHzFudgeFactorCatchUp400;
576
577	/** The UTC offset in ns.
578	* This is NOT for converting UTC to local time. It is for converting real
579	* world UTC time to VM UTC time. This feature is indented for doing date
580	* testing of software and similar.
581	* @todo Implement warpdrive on UTC. */
582	int64_t offUTC;
583	/** The last value TMR3UtcNow returned. */
584	int64_t volatile nsLastUtcNow;
585	/** File to touch on UTC jump. */
586	R3PTRTYPE(char *) pszUtcTouchFileOnJump;
587
588	/** Pointer to our R3 mapping of the GIP. */
589	R3PTRTYPE(void *) pvGIPR3;
590
591	/** The schedule timer timer handle (runtime timer).
592	* This timer will do frequent check on pending queue schedules and
593	* raise VM_FF_TIMER to pull EMTs attention to them.
594	*/
595	R3PTRTYPE(PRTTIMER) pTimer;
596	/** Interval in milliseconds of the pTimer timer. */
597	uint32_t u32TimerMillies;
598
599	/** Indicates that queues are being run. */
600	bool volatile fRunningQueues;
601	/** Indicates that the virtual sync queue is being run. */
602	bool volatile fRunningVirtualSyncQueue;
603	/** Alignment */
604	bool afAlignment3[2];
605
606	/** Lock serializing access to the VirtualSync clock and the associated
607	* timer queue.
608	* @todo Consider merging this with the TMTIMERQUEUE::TimerLock for the
609	* virtual sync queue. */
610	PDMCRITSECT VirtualSyncLock;
611
612	/** CPU load state for all the virtual CPUs (tmR3CpuLoadTimer). */
613	TMCPULOADSTATE CpuLoad;
614
615	/** TMR3TimerQueuesDo
616	* @{ */
617	STAMPROFILE StatDoQueues;
618	/** @} */
619	/** tmSchedule
620	* @{ */
621	STAMPROFILE StatScheduleOneRZ;
622	STAMPROFILE StatScheduleOneR3;
623	STAMCOUNTER StatScheduleSetFF;
624	STAMCOUNTER StatPostponedR3;
625	STAMCOUNTER StatPostponedRZ;
626	/** @} */
627	/** Read the time
628	* @{ */
629	STAMCOUNTER StatVirtualGet;
630	STAMCOUNTER StatVirtualGetSetFF;
631	STAMCOUNTER StatVirtualSyncGet;
632	STAMCOUNTER StatVirtualSyncGetAdjLast;
633	STAMCOUNTER StatVirtualSyncGetELoop;
634	STAMCOUNTER StatVirtualSyncGetExpired;
635	STAMCOUNTER StatVirtualSyncGetLockless;
636	STAMCOUNTER StatVirtualSyncGetLocked;
637	STAMCOUNTER StatVirtualSyncGetSetFF;
638	STAMCOUNTER StatVirtualPause;
639	STAMCOUNTER StatVirtualResume;
640	/** @} */
641	/** TMTimerPoll
642	* @{ */
643	STAMCOUNTER StatPoll;
644	STAMCOUNTER StatPollAlreadySet;
645	STAMCOUNTER StatPollELoop;
646	STAMCOUNTER StatPollMiss;
647	STAMCOUNTER StatPollRunning;
648	STAMCOUNTER StatPollSimple;
649	STAMCOUNTER StatPollVirtual;
650	STAMCOUNTER StatPollVirtualSync;
651	/** @} */
652	/** TMTimerSet sans virtual sync timers.
653	* @{ */
654	STAMCOUNTER StatTimerSet;
655	STAMCOUNTER StatTimerSetOpt;
656	STAMPROFILE StatTimerSetRZ;
657	STAMPROFILE StatTimerSetR3;
658	STAMCOUNTER StatTimerSetStStopped;
659	STAMCOUNTER StatTimerSetStExpDeliver;
660	STAMCOUNTER StatTimerSetStActive;
661	STAMCOUNTER StatTimerSetStPendStop;
662	STAMCOUNTER StatTimerSetStPendStopSched;
663	STAMCOUNTER StatTimerSetStPendSched;
664	STAMCOUNTER StatTimerSetStPendResched;
665	STAMCOUNTER StatTimerSetStOther;
666	/** @} */
667	/** TMTimerSet on virtual sync timers.
668	* @{ */
669	STAMCOUNTER StatTimerSetVs;
670	STAMPROFILE StatTimerSetVsRZ;
671	STAMPROFILE StatTimerSetVsR3;
672	STAMCOUNTER StatTimerSetVsStStopped;
673	STAMCOUNTER StatTimerSetVsStExpDeliver;
674	STAMCOUNTER StatTimerSetVsStActive;
675	/** @} */
676	/** TMTimerSetRelative sans virtual sync timers
677	* @{ */
678	STAMCOUNTER StatTimerSetRelative;
679	STAMPROFILE StatTimerSetRelativeRZ;
680	STAMPROFILE StatTimerSetRelativeR3;
681	STAMCOUNTER StatTimerSetRelativeOpt;
682	STAMCOUNTER StatTimerSetRelativeStStopped;
683	STAMCOUNTER StatTimerSetRelativeStExpDeliver;
684	STAMCOUNTER StatTimerSetRelativeStActive;
685	STAMCOUNTER StatTimerSetRelativeStPendStop;
686	STAMCOUNTER StatTimerSetRelativeStPendStopSched;
687	STAMCOUNTER StatTimerSetRelativeStPendSched;
688	STAMCOUNTER StatTimerSetRelativeStPendResched;
689	STAMCOUNTER StatTimerSetRelativeStOther;
690	/** @} */
691	/** TMTimerSetRelative on virtual sync timers.
692	* @{ */
693	STAMCOUNTER StatTimerSetRelativeVs;
694	STAMPROFILE StatTimerSetRelativeVsRZ;
695	STAMPROFILE StatTimerSetRelativeVsR3;
696	STAMCOUNTER StatTimerSetRelativeVsStStopped;
697	STAMCOUNTER StatTimerSetRelativeVsStExpDeliver;
698	STAMCOUNTER StatTimerSetRelativeVsStActive;
699	/** @} */
700	/** TMTimerStop sans virtual sync.
701	* @{ */
702	STAMPROFILE StatTimerStopRZ;
703	STAMPROFILE StatTimerStopR3;
704	/** @} */
705	/** TMTimerStop on virtual sync timers.
706	* @{ */
707	STAMPROFILE StatTimerStopVsRZ;
708	STAMPROFILE StatTimerStopVsR3;
709	/** @} */
710	/** VirtualSync - Running and Catching Up
711	* @{ */
712	STAMCOUNTER StatVirtualSyncRun;
713	STAMCOUNTER StatVirtualSyncRunRestart;
714	STAMPROFILE StatVirtualSyncRunSlack;
715	STAMCOUNTER StatVirtualSyncRunStop;
716	STAMCOUNTER StatVirtualSyncRunStoppedAlready;
717	STAMCOUNTER StatVirtualSyncGiveUp;
718	STAMCOUNTER StatVirtualSyncGiveUpBeforeStarting;
719	STAMPROFILEADV StatVirtualSyncCatchup;
720	STAMCOUNTER aStatVirtualSyncCatchupInitial[TM_MAX_CATCHUP_PERIODS];
721	STAMCOUNTER aStatVirtualSyncCatchupAdjust[TM_MAX_CATCHUP_PERIODS];
722	/** @} */
723	/** TMR3VirtualSyncFF (non dedicated EMT). */
724	STAMPROFILE StatVirtualSyncFF;
725	/** The timer callback. */
726	STAMCOUNTER StatTimerCallbackSetFF;
727	STAMCOUNTER StatTimerCallback;
728
729	/** Calls to TMCpuTickSet. */
730	STAMCOUNTER StatTSCSet;
731
732	/** TSC starts and stops. */
733	STAMCOUNTER StatTSCPause;
734	STAMCOUNTER StatTSCResume;
735
736	/** @name Reasons for refusing TSC offsetting in TMCpuTickCanUseRealTSC.
737	* @{ */
738	STAMCOUNTER StatTSCNotFixed;
739	STAMCOUNTER StatTSCNotTicking;
740	STAMCOUNTER StatTSCCatchupLE010;
741	STAMCOUNTER StatTSCCatchupLE025;
742	STAMCOUNTER StatTSCCatchupLE100;
743	STAMCOUNTER StatTSCCatchupOther;
744	STAMCOUNTER StatTSCWarp;
745	STAMCOUNTER StatTSCUnderflow;
746	STAMCOUNTER StatTSCSyncNotTicking;
747	/** @} */
748
749	#ifdef TM_SECONDS_TO_AUTOMATIC_POWER_OFF
750	/** The automatic power off timer. */
751	TMTIMERHANDLE hAutoPowerOff;
752	#endif
753	} TM;
754	/** Pointer to TM VM instance data. */
755	typedef TM *PTM;
756
757
758	/**
759	* TM VMCPU Instance data.
760	* Changes to this must checked against the padding of the tm union in VM!
761	*/
762	typedef struct TMCPU
763	{
764	/** The offset between the host tick (TSC/virtual depending on the TSC mode) and
765	* the guest tick. */
766	uint64_t offTSCRawSrc;
767	/** The guest TSC when fTicking is cleared. */
768	uint64_t u64TSC;
769	/** The last seen TSC by the guest. */
770	uint64_t u64TSCLastSeen;
771	/** CPU timestamp ticking enabled indicator (bool). (RDTSC) */
772	bool fTSCTicking;
773	#ifdef VBOX_WITHOUT_NS_ACCOUNTING
774	bool afAlignment1[7]; /*< alignment padding /
775	#else /* !VBOX_WITHOUT_NS_ACCOUNTING */
776
777	/** Set by the timer callback to trigger updating of statistics in
778	* TMNotifyEndOfExecution. */
779	bool volatile fUpdateStats;
780	bool afAlignment1[6];
781	/** The time not spent executing or halted.
782	* @note Only updated after halting and after the timer runs. */
783	uint64_t cNsOtherStat;
784	/** Reasonably up to date total run time value.
785	* @note Only updated after halting and after the timer runs. */
786	uint64_t cNsTotalStat;
787	# if defined(VBOX_WITH_STATISTICS) \|\| defined(VBOX_WITH_NS_ACCOUNTING_STATS)
788	/** Resettable copy of version of cNsOtherStat.
789	* @note Only updated after halting. */
790	STAMCOUNTER StatNsOther;
791	/** Resettable copy of cNsTotalStat.
792	* @note Only updated after halting. */
793	STAMCOUNTER StatNsTotal;
794	# else
795	uint64_t auAlignment2[2];
796	# endif
797
798	/** @name Core accounting data.
799	* @note Must be cache-line aligned and only written to by the EMT owning it.
800	* @{ */
801	/** The cNsXXX generation. */
802	uint32_t volatile uTimesGen;
803	/** Set if executing (between TMNotifyStartOfExecution and
804	* TMNotifyEndOfExecution). */
805	bool volatile fExecuting;
806	/** Set if halting (between TMNotifyStartOfHalt and TMNotifyEndOfHalt). */
807	bool volatile fHalting;
808	/** Set if we're suspended and u64NsTsStartTotal is to be cNsTotal. */
809	bool volatile fSuspended;
810	bool afAlignment;
811	/** The nanosecond timestamp of the CPU start or resume.
812	* This is recalculated when the VM is started so that
813	* cNsTotal = RTTimeNanoTS() - u64NsTsStartCpu. */
814	uint64_t nsStartTotal;
815	/** The TSC of the last start-execute notification. */
816	uint64_t uTscStartExecuting;
817	/** The number of nanoseconds spent executing. */
818	uint64_t cNsExecuting;
819	/** The number of guest execution runs. */
820	uint64_t cPeriodsExecuting;
821	/** The nanosecond timestamp of the last start-halt notification. */
822	uint64_t nsStartHalting;
823	/** The number of nanoseconds being halted. */
824	uint64_t cNsHalted;
825	/** The number of halts. */
826	uint64_t cPeriodsHalted;
827	/** @} */
828
829	# if defined(VBOX_WITH_STATISTICS) \|\| defined(VBOX_WITH_NS_ACCOUNTING_STATS)
830	/** Resettable version of cNsExecuting. */
831	STAMPROFILE StatNsExecuting;
832	/** Long execution intervals. */
833	STAMPROFILE StatNsExecLong;
834	/** Short execution intervals. */
835	STAMPROFILE StatNsExecShort;
836	/** Tiny execution intervals. */
837	STAMPROFILE StatNsExecTiny;
838	/** Resettable version of cNsHalted. */
839	STAMPROFILE StatNsHalted;
840	# endif
841
842	/** CPU load state for this virtual CPU (tmR3CpuLoadTimer). */
843	TMCPULOADSTATE CpuLoad;
844	#endif
845	} TMCPU;
846	#ifndef VBOX_WITHOUT_NS_ACCOUNTING
847	AssertCompileMemberAlignment(TMCPU, uTimesGen, 64);
848	# if defined(VBOX_WITH_STATISTICS) \|\| defined(VBOX_WITH_NS_ACCOUNTING_STATS)
849	AssertCompileMemberAlignment(TMCPU, StatNsExecuting, 64);
850	# else
851	AssertCompileMemberAlignment(TMCPU, CpuLoad, 64);
852	# endif
853	#endif
854	/** Pointer to TM VMCPU instance data. */
855	typedef TMCPU *PTMCPU;
856
857
858	/**
859	* TM data kept in the ring-0 GVM.
860	*/
861	typedef struct TMR0PERVM
862	{
863	/** Timer queues for the different clock types. */
864	TMTIMERQUEUER0 aTimerQueues[TMCLOCK_MAX];
865
866	/** The ring-0 data structure for the RTTimeNanoTS workers used by tmVirtualGetRawNanoTS. */
867	RTTIMENANOTSDATAR0 VirtualGetRawData;
868	/** Pointer to the ring-0 tmVirtualGetRawNanoTS worker function. */
869	R0PTRTYPE(PFNTIMENANOTSINTERNAL) pfnVirtualGetRaw;
870	} TMR0PERVM;
871
872
873	const char *tmTimerState(TMTIMERSTATE enmState);
874	void tmTimerQueueSchedule(PVMCC pVM, PTMTIMERQUEUECC pQueueCC, PTMTIMERQUEUE pQueue);
875	#ifdef VBOX_STRICT
876	void tmTimerQueuesSanityChecks(PVMCC pVM, const char *pszWhere);
877	#endif
878	void tmHCTimerQueueGrowInit(PTMTIMER paTimers, TMTIMER const *paOldTimers, uint32_t cNewTimers, uint32_t cOldTimers);
879
880	uint64_t tmR3CpuTickGetRawVirtualNoCheck(PVM pVM);
881	int tmCpuTickPause(PVMCPUCC pVCpu);
882	int tmCpuTickPauseLocked(PVMCC pVM, PVMCPUCC pVCpu);
883	int tmCpuTickResume(PVMCC pVM, PVMCPUCC pVCpu);
884	int tmCpuTickResumeLocked(PVMCC pVM, PVMCPUCC pVCpu);
885
886	int tmVirtualPauseLocked(PVMCC pVM);
887	int tmVirtualResumeLocked(PVMCC pVM);
888	DECLCALLBACK(DECLEXPORT(void)) tmVirtualNanoTSBad(PRTTIMENANOTSDATA pData, uint64_t u64NanoTS,
889	uint64_t u64DeltaPrev, uint64_t u64PrevNanoTS);
890	DECLCALLBACK(DECLEXPORT(uint64_t)) tmVirtualNanoTSRediscover(PRTTIMENANOTSDATA pData, PRTITMENANOTSEXTRA pExtra);
891	DECLCALLBACK(DECLEXPORT(uint64_t)) tmVirtualNanoTSBadCpuIndex(PRTTIMENANOTSDATA pData, PRTITMENANOTSEXTRA pExtra,
892	uint16_t idApic, uint16_t iCpuSet, uint16_t iGipCpu);
893	/** @} */
894
895	RT_C_DECLS_END
896
897	#endif /* !VMM_INCLUDED_SRC_include_TMInternal_h */

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source: vbox/trunk/src/VBox/VMM/include/TMInternal.h@ 106695

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