VMInternal.h@ 14600

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1	/* $Id: VMInternal.h 13791 2008-11-04 16:12:57Z vboxsync $ */
2	/** @file
3	* VM - 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 ___VMInternal_h
23	#define ___VMInternal_h
24
25	#include <VBox/cdefs.h>
26	#include <VBox/vmapi.h>
27	#include <setjmp.h>
28
29
30
31	/** @defgroup grp_vm_int Internals
32	* @ingroup grp_vm
33	* @internal
34	* @{
35	*/
36
37
38	/**
39	* At-reset callback type.
40	*/
41	typedef enum VMATRESETTYPE
42	{
43	/** Device callback. */
44	VMATRESETTYPE_DEV = 1,
45	/** Internal callback . */
46	VMATRESETTYPE_INTERNAL,
47	/** External callback. */
48	VMATRESETTYPE_EXTERNAL
49	} VMATRESETTYPE;
50
51
52	/** Pointer to at-reset callback. */
53	typedef struct VMATRESET *PVMATRESET;
54
55	/**
56	* At reset callback.
57	*/
58	typedef struct VMATRESET
59	{
60	/** Pointer to the next one in the list. */
61	PVMATRESET pNext;
62	/** Callback type. */
63	VMATRESETTYPE enmType;
64	/** User argument for the callback. */
65	void *pvUser;
66	/** Description. */
67	const char *pszDesc;
68	/** Type specific data. */
69	union
70	{
71	/** VMATRESETTYPE_DEV. */
72	struct
73	{
74	/** Callback. */
75	PFNVMATRESET pfnCallback;
76	/** Device instance. */
77	PPDMDEVINS pDevIns;
78	} Dev;
79
80	/** VMATRESETTYPE_INTERNAL. */
81	struct
82	{
83	/** Callback. */
84	PFNVMATRESETINT pfnCallback;
85	} Internal;
86
87	/** VMATRESETTYPE_EXTERNAL. */
88	struct
89	{
90	/** Callback. */
91	PFNVMATRESETEXT pfnCallback;
92	} External;
93	} u;
94	} VMATRESET;
95
96
97	/**
98	* VM state change callback.
99	*/
100	typedef struct VMATSTATE
101	{
102	/** Pointer to the next one. */
103	struct VMATSTATE *pNext;
104	/** Pointer to the callback. */
105	PFNVMATSTATE pfnAtState;
106	/** The user argument. */
107	void *pvUser;
108	} VMATSTATE;
109	/** Pointer to a VM state change callback. */
110	typedef VMATSTATE *PVMATSTATE;
111
112
113	/**
114	* VM error callback.
115	*/
116	typedef struct VMATERROR
117	{
118	/** Pointer to the next one. */
119	struct VMATERROR *pNext;
120	/** Pointer to the callback. */
121	PFNVMATERROR pfnAtError;
122	/** The user argument. */
123	void *pvUser;
124	} VMATERROR;
125	/** Pointer to a VM error callback. */
126	typedef VMATERROR *PVMATERROR;
127
128
129	/**
130	* Chunk of memory allocated off the hypervisor heap in which
131	* we copy the error details.
132	*/
133	typedef struct VMERROR
134	{
135	/** The size of the chunk. */
136	uint32_t cbAllocated;
137	/** The current offset into the chunk.
138	* We start by putting the filename and function immediatly
139	* after the end of the buffer. */
140	uint32_t off;
141	/** Offset from the start of this structure to the file name. */
142	uint32_t offFile;
143	/** The line number. */
144	uint32_t iLine;
145	/** Offset from the start of this structure to the function name. */
146	uint32_t offFunction;
147	/** Offset from the start of this structure to the formatted message text. */
148	uint32_t offMessage;
149	/** The VBox status code. */
150	int32_t rc;
151	} VMERROR, *PVMERROR;
152
153
154	/**
155	* VM runtime error callback.
156	*/
157	typedef struct VMATRUNTIMEERROR
158	{
159	/** Pointer to the next one. */
160	struct VMATRUNTIMEERROR *pNext;
161	/** Pointer to the callback. */
162	PFNVMATRUNTIMEERROR pfnAtRuntimeError;
163	/** The user argument. */
164	void *pvUser;
165	} VMATRUNTIMEERROR;
166	/** Pointer to a VM error callback. */
167	typedef VMATRUNTIMEERROR *PVMATRUNTIMEERROR;
168
169
170	/**
171	* Chunk of memory allocated off the hypervisor heap in which
172	* we copy the runtime error details.
173	*/
174	typedef struct VMRUNTIMEERROR
175	{
176	/** The size of the chunk. */
177	uint32_t cbAllocated;
178	/** The current offset into the chunk.
179	* We start by putting the error ID immediatly
180	* after the end of the buffer. */
181	uint32_t off;
182	/** Offset from the start of this structure to the error ID. */
183	uint32_t offErrorID;
184	/** Offset from the start of this structure to the formatted message text. */
185	uint32_t offMessage;
186	/** Whether the error is fatal or not */
187	bool fFatal;
188	} VMRUNTIMEERROR, *PVMRUNTIMEERROR;
189
190	/** The halt method. */
191	typedef enum
192	{
193	/** The usual invalid value. */
194	VMHALTMETHOD_INVALID = 0,
195	/** Use the method used during bootstrapping. */
196	VMHALTMETHOD_BOOTSTRAP,
197	/** Use the default method. */
198	VMHALTMETHOD_DEFAULT,
199	/** The old spin/yield/block method. */
200	VMHALTMETHOD_OLD,
201	/** The first go at a block/spin method. */
202	VMHALTMETHOD_1,
203	/** The first go at a more global approach. */
204	VMHALTMETHOD_GLOBAL_1,
205	/** The end of valid methods. (not inclusive of course) */
206	VMHALTMETHOD_END,
207	/** The usual 32-bit max value. */
208	VMHALTMETHOD_32BIT_HACK = 0x7fffffff
209	} VMHALTMETHOD;
210
211
212	/**
213	* VM Internal Data (part of the VM structure).
214	*
215	* @todo Move this and all related things to VMM. The VM component was, to some
216	* extent at least, a bad ad hoc design which should all have been put in
217	* VMM. @see pg_vm.
218	*/
219	typedef struct VMINT
220	{
221	/** VM Error Message. */
222	R3PTRTYPE(PVMERROR) pErrorR3;
223	/** VM Runtime Error Message. */
224	R3PTRTYPE(PVMRUNTIMEERROR) pRuntimeErrorR3;
225	/** Set by VMR3SuspendNoSave; cleared by VMR3Resume; signals the VM is in an
226	* inconsistent state and saving is not allowed. */
227	bool fPreventSaveState;
228	} VMINT;
229	/** Pointer to the VM Internal Data (part of the VM structure). */
230	typedef VMINT *PVMINT;
231
232
233	/**
234	* VM internal data kept in the UVM.
235	*/
236	typedef struct VMINTUSERPERVM
237	{
238	/** Head of the request queue. Atomic. */
239	volatile PVMREQ pReqs;
240	/** The last index used during alloc/free. */
241	volatile uint32_t iReqFree;
242	/** Number of free request packets. */
243	volatile uint32_t cReqFree;
244	/** Array of pointers to lists of free request packets. Atomic. */
245	volatile PVMREQ apReqFree[9];
246
247	#ifdef VBOX_WITH_STATISTICS
248	/** Number of VMR3ReqAlloc returning a new packet. */
249	STAMCOUNTER StatReqAllocNew;
250	/** Number of VMR3ReqAlloc causing races. */
251	STAMCOUNTER StatReqAllocRaces;
252	/** Number of VMR3ReqAlloc returning a recycled packet. */
253	STAMCOUNTER StatReqAllocRecycled;
254	/** Number of VMR3ReqFree calls. */
255	STAMCOUNTER StatReqFree;
256	/** Number of times the request was actually freed. */
257	STAMCOUNTER StatReqFreeOverflow;
258	#endif
259
260	/** Pointer to the support library session.
261	* Mainly for creation and destruction.. */
262	PSUPDRVSESSION pSession;
263
264	/** Wait event semaphore. */
265	RTSEMEVENT EventSemWait;
266	/** Wait/Idle indicator. */
267	bool volatile fWait;
268	/** Force EMT to terminate. */
269	bool volatile fTerminateEMT;
270	/** If set the EMT does the final VM cleanup when it exits.
271	* If clear the VMR3Destroy() caller does so. */
272	bool fEMTDoesTheCleanup;
273
274	/** @name Generic Halt data
275	* @{
276	*/
277	/** The current halt method.
278	* Can be selected by CFGM option 'VM/HaltMethod'. */
279	VMHALTMETHOD enmHaltMethod;
280	/** The index into g_aHaltMethods of the current halt method. */
281	uint32_t volatile iHaltMethod;
282	/** The average time (ns) between two halts in the last second. (updated once per second) */
283	uint32_t HaltInterval;
284	/** The average halt frequency for the last second. (updated once per second) */
285	uint32_t HaltFrequency;
286	/** The number of halts in the current period. */
287	uint32_t cHalts;
288	uint32_t padding; /*< alignment padding. /
289	/** When we started counting halts in cHalts (RTTimeNanoTS). */
290	uint64_t u64HaltsStartTS;
291	/** @} */
292
293	/** Union containing data and config for the different halt algorithms. */
294	union
295	{
296	/**
297	* Method 1 & 2 - Block whenever possible, and when lagging behind
298	* switch to spinning with regular blocking every 5-200ms (defaults)
299	* depending on the accumulated lag. The blocking interval is adjusted
300	* with the average oversleeping of the last 64 times.
301	*
302	* The difference between 1 and 2 is that we use native absolute
303	* time APIs for the blocking instead of the millisecond based IPRT
304	* interface.
305	*/
306	struct
307	{
308	/** How many times we've blocked while cBlockedNS and cBlockedTooLongNS has been accumulating. */
309	uint32_t cBlocks;
310	/** Avg. time spend oversleeping when blocking. (Re-calculated every so often.) */
311	uint64_t cNSBlockedTooLongAvg;
312	/** Total time spend oversleeping when blocking. */
313	uint64_t cNSBlockedTooLong;
314	/** Total time spent blocking. */
315	uint64_t cNSBlocked;
316	/** The timestamp (RTTimeNanoTS) of the last block. */
317	uint64_t u64LastBlockTS;
318
319	/** When we started spinning relentlessly in order to catch up some of the oversleeping.
320	* This is 0 when we're not spinning. */
321	uint64_t u64StartSpinTS;
322
323	/** The max interval without blocking (when spinning). */
324	uint32_t u32MinBlockIntervalCfg;
325	/** The minimum interval between blocking (when spinning). */
326	uint32_t u32MaxBlockIntervalCfg;
327	/** The value to divide the current lag by to get the raw blocking interval (when spinning). */
328	uint32_t u32LagBlockIntervalDivisorCfg;
329	/** When to start spinning (lag / nano secs). */
330	uint32_t u32StartSpinningCfg;
331	/** When to stop spinning (lag / nano secs). */
332	uint32_t u32StopSpinningCfg;
333	} Method12;
334
335	#if 0
336	/**
337	* Method 3 & 4 - Same as method 1 & 2 respectivly, except that we
338	* sprinkle it with yields.
339	*/
340	struct
341	{
342	/** How many times we've blocked while cBlockedNS and cBlockedTooLongNS has been accumulating. */
343	uint32_t cBlocks;
344	/** Avg. time spend oversleeping when blocking. (Re-calculated every so often.) */
345	uint64_t cBlockedTooLongNSAvg;
346	/** Total time spend oversleeping when blocking. */
347	uint64_t cBlockedTooLongNS;
348	/** Total time spent blocking. */
349	uint64_t cBlockedNS;
350	/** The timestamp (RTTimeNanoTS) of the last block. */
351	uint64_t u64LastBlockTS;
352
353	/** How many times we've yielded while cBlockedNS and cBlockedTooLongNS has been accumulating. */
354	uint32_t cYields;
355	/** Avg. time spend oversleeping when yielding. */
356	uint32_t cYieldTooLongNSAvg;
357	/** Total time spend oversleeping when yielding. */
358	uint64_t cYieldTooLongNS;
359	/** Total time spent yielding. */
360	uint64_t cYieldedNS;
361	/** The timestamp (RTTimeNanoTS) of the last block. */
362	uint64_t u64LastYieldTS;
363
364	/** When we started spinning relentlessly in order to catch up some of the oversleeping. */
365	uint64_t u64StartSpinTS;
366	} Method34;
367	#endif
368	} Halt;
369
370	/** Profiling the halted state; yielding vs blocking.
371	* @{ */
372	STAMPROFILE StatHaltYield;
373	STAMPROFILE StatHaltBlock;
374	STAMPROFILE StatHaltTimers;
375	STAMPROFILE StatHaltPoll;
376	/** @} */
377
378
379	/** List of registered reset callbacks. */
380	PVMATRESET pAtReset;
381	/** List of registered reset callbacks. */
382	PVMATRESET *ppAtResetNext;
383
384	/** List of registered state change callbacks. */
385	PVMATSTATE pAtState;
386	/** List of registered state change callbacks. */
387	PVMATSTATE *ppAtStateNext;
388
389	/** List of registered error callbacks. */
390	PVMATERROR pAtError;
391	/** List of registered error callbacks. */
392	PVMATERROR *ppAtErrorNext;
393
394	/** List of registered error callbacks. */
395	PVMATRUNTIMEERROR pAtRuntimeError;
396	/** List of registered error callbacks. */
397	PVMATRUNTIMEERROR *ppAtRuntimeErrorNext;
398
399	/** Pointer to the DBGC instance data. */
400	void *pvDBGC;
401
402	/* TLS index for the VMINTUSERPERVMCPU pointer. */
403	RTTLS idxTLS;
404	} VMINTUSERPERVM;
405
406	/** Pointer to the VM internal data kept in the UVM. */
407	typedef VMINTUSERPERVM *PVMINTUSERPERVM;
408
409
410	/**
411	* VMCPU internal data kept in the UVM.
412	*
413	* Almost a copy of VMINTUSERPERVM. Separate data properly later on.
414	*/
415	typedef struct VMINTUSERPERVMCPU
416	{
417	/** Head of the request queue. Atomic. */
418	volatile PVMREQ pReqs;
419
420	/** The handle to the EMT thread. */
421	RTTHREAD ThreadEMT;
422	/** The native of the EMT thread. */
423	RTNATIVETHREAD NativeThreadEMT;
424	/** Wait event semaphore. */
425	RTSEMEVENT EventSemWait;
426	/** Wait/Idle indicator. */
427	bool volatile fWait;
428	/** Force EMT to terminate. */
429	bool volatile fTerminateEMT;
430	/** If set the EMT does the final VM cleanup when it exits.
431	* If clear the VMR3Destroy() caller does so. */
432	bool fEMTDoesTheCleanup;
433
434	/** @name Generic Halt data
435	* @{
436	*/
437	/** The current halt method.
438	* Can be selected by CFGM option 'VM/HaltMethod'. */
439	VMHALTMETHOD enmHaltMethod;
440	/** The index into g_aHaltMethods of the current halt method. */
441	uint32_t volatile iHaltMethod;
442	/** The average time (ns) between two halts in the last second. (updated once per second) */
443	uint32_t HaltInterval;
444	/** The average halt frequency for the last second. (updated once per second) */
445	uint32_t HaltFrequency;
446	/** The number of halts in the current period. */
447	uint32_t cHalts;
448	uint32_t padding; /*< alignment padding. /
449	/** When we started counting halts in cHalts (RTTimeNanoTS). */
450	uint64_t u64HaltsStartTS;
451	/** @} */
452
453	/** Union containing data and config for the different halt algorithms. */
454	union
455	{
456	/**
457	* Method 1 & 2 - Block whenever possible, and when lagging behind
458	* switch to spinning with regular blocking every 5-200ms (defaults)
459	* depending on the accumulated lag. The blocking interval is adjusted
460	* with the average oversleeping of the last 64 times.
461	*
462	* The difference between 1 and 2 is that we use native absolute
463	* time APIs for the blocking instead of the millisecond based IPRT
464	* interface.
465	*/
466	struct
467	{
468	/** How many times we've blocked while cBlockedNS and cBlockedTooLongNS has been accumulating. */
469	uint32_t cBlocks;
470	/** Avg. time spend oversleeping when blocking. (Re-calculated every so often.) */
471	uint64_t cNSBlockedTooLongAvg;
472	/** Total time spend oversleeping when blocking. */
473	uint64_t cNSBlockedTooLong;
474	/** Total time spent blocking. */
475	uint64_t cNSBlocked;
476	/** The timestamp (RTTimeNanoTS) of the last block. */
477	uint64_t u64LastBlockTS;
478
479	/** When we started spinning relentlessly in order to catch up some of the oversleeping.
480	* This is 0 when we're not spinning. */
481	uint64_t u64StartSpinTS;
482
483	/** The max interval without blocking (when spinning). */
484	uint32_t u32MinBlockIntervalCfg;
485	/** The minimum interval between blocking (when spinning). */
486	uint32_t u32MaxBlockIntervalCfg;
487	/** The value to divide the current lag by to get the raw blocking interval (when spinning). */
488	uint32_t u32LagBlockIntervalDivisorCfg;
489	/** When to start spinning (lag / nano secs). */
490	uint32_t u32StartSpinningCfg;
491	/** When to stop spinning (lag / nano secs). */
492	uint32_t u32StopSpinningCfg;
493	} Method12;
494
495	#if 0
496	/**
497	* Method 3 & 4 - Same as method 1 & 2 respectivly, except that we
498	* sprinkle it with yields.
499	*/
500	struct
501	{
502	/** How many times we've blocked while cBlockedNS and cBlockedTooLongNS has been accumulating. */
503	uint32_t cBlocks;
504	/** Avg. time spend oversleeping when blocking. (Re-calculated every so often.) */
505	uint64_t cBlockedTooLongNSAvg;
506	/** Total time spend oversleeping when blocking. */
507	uint64_t cBlockedTooLongNS;
508	/** Total time spent blocking. */
509	uint64_t cBlockedNS;
510	/** The timestamp (RTTimeNanoTS) of the last block. */
511	uint64_t u64LastBlockTS;
512
513	/** How many times we've yielded while cBlockedNS and cBlockedTooLongNS has been accumulating. */
514	uint32_t cYields;
515	/** Avg. time spend oversleeping when yielding. */
516	uint32_t cYieldTooLongNSAvg;
517	/** Total time spend oversleeping when yielding. */
518	uint64_t cYieldTooLongNS;
519	/** Total time spent yielding. */
520	uint64_t cYieldedNS;
521	/** The timestamp (RTTimeNanoTS) of the last block. */
522	uint64_t u64LastYieldTS;
523
524	/** When we started spinning relentlessly in order to catch up some of the oversleeping. */
525	uint64_t u64StartSpinTS;
526	} Method34;
527	#endif
528	} Halt;
529
530	/** Profiling the halted state; yielding vs blocking.
531	* @{ */
532	STAMPROFILE StatHaltYield;
533	STAMPROFILE StatHaltBlock;
534	STAMPROFILE StatHaltTimers;
535	STAMPROFILE StatHaltPoll;
536	/** @} */
537
538	/** Pointer to the DBGC instance data. */
539	void *pvDBGC;
540
541	/** vmR3EmulationThread longjmp buffer. Must be last in the structure. */
542	jmp_buf emtJumpEnv;
543	} VMINTUSERPERVMCPU;
544
545	/** Pointer to the VM internal data kept in the UVM. */
546	typedef VMINTUSERPERVMCPU *PVMINTUSERPERVMCPU;
547
548	DECLCALLBACK(int) vmR3EmulationThread(RTTHREAD ThreadSelf, void *pvArg);
549	int vmR3SetHaltMethodU(PUVM pUVM, VMHALTMETHOD enmHaltMethod);
550	DECLCALLBACK(int) vmR3Destroy(PVM pVM);
551	DECLCALLBACK(void) vmR3SetErrorUV(PUVM pUVM, int rc, RT_SRC_POS_DECL, const char pszFormat, va_list args);
552	void vmSetErrorCopy(PVM pVM, int rc, RT_SRC_POS_DECL, const char *pszFormat, va_list args);
553	DECLCALLBACK(void) vmR3SetRuntimeErrorV(PVM pVM, bool fFatal, const char pszErrorID, const char pszFormat, va_list *args);
554	void vmSetRuntimeErrorCopy(PVM pVM, bool fFatal, const char pszErrorID, const char pszFormat, va_list args);
555	void vmR3DestroyFinalBitFromEMT(PUVM pUVM);
556	void vmR3SetState(PVM pVM, VMSTATE enmStateNew);
557
558
559	/** @} */
560
561	#endif
562

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