VMInternal.h@ 19420

Last change on this file since 19420 was 19401, checked in by vboxsync, 16 years ago
VMEmt.cpp: Another SMP todo
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1	/* $Id: VMInternal.h 19401 2009-05-05 22:05:50Z 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	/** Error flags. */
187	uint32_t fFlags;
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	/** Force EMT to terminate. */
265	bool volatile fTerminateEMT;
266	/** If set the EMT does the final VM cleanup when it exits.
267	* If clear the VMR3Destroy() caller does so. */
268	bool fEMTDoesTheCleanup;
269
270	/** List of registered reset callbacks. */
271	PVMATRESET pAtReset;
272	/** List of registered reset callbacks. */
273	PVMATRESET *ppAtResetNext;
274
275	/** List of registered state change callbacks. */
276	PVMATSTATE pAtState;
277	/** List of registered state change callbacks. */
278	PVMATSTATE *ppAtStateNext;
279
280	/** List of registered error callbacks. */
281	PVMATERROR pAtError;
282	/** List of registered error callbacks. */
283	PVMATERROR *ppAtErrorNext;
284
285	/** List of registered error callbacks. */
286	PVMATRUNTIMEERROR pAtRuntimeError;
287	/** List of registered error callbacks. */
288	PVMATRUNTIMEERROR *ppAtRuntimeErrorNext;
289
290	/** @name Generic Halt data
291	* @{
292	*/
293	/** The current halt method.
294	* Can be selected by CFGM option 'VM/HaltMethod'. */
295	VMHALTMETHOD enmHaltMethod;
296	/** The index into g_aHaltMethods of the current halt method. */
297	uint32_t volatile iHaltMethod;
298	/** @} */
299
300	/** @todo Do NOT add new members here or resue the current, we need to store the config for
301	* each halt method seperately because we're racing on SMP guest rigs. */
302	union
303	{
304	/**
305	* Method 1 & 2 - Block whenever possible, and when lagging behind
306	* switch to spinning with regular blocking every 5-200ms (defaults)
307	* depending on the accumulated lag. The blocking interval is adjusted
308	* with the average oversleeping of the last 64 times.
309	*
310	* The difference between 1 and 2 is that we use native absolute
311	* time APIs for the blocking instead of the millisecond based IPRT
312	* interface.
313	*/
314	struct
315	{
316	/** The max interval without blocking (when spinning). */
317	uint32_t u32MinBlockIntervalCfg;
318	/** The minimum interval between blocking (when spinning). */
319	uint32_t u32MaxBlockIntervalCfg;
320	/** The value to divide the current lag by to get the raw blocking interval (when spinning). */
321	uint32_t u32LagBlockIntervalDivisorCfg;
322	/** When to start spinning (lag / nano secs). */
323	uint32_t u32StartSpinningCfg;
324	/** When to stop spinning (lag / nano secs). */
325	uint32_t u32StopSpinningCfg;
326	} Method12;
327	} Halt;
328
329	/** Pointer to the DBGC instance data. */
330	void *pvDBGC;
331
332	/** TLS index for the VMINTUSERPERVMCPU pointer. */
333	RTTLS idxTLS;
334	} VMINTUSERPERVM;
335
336	/** Pointer to the VM internal data kept in the UVM. */
337	typedef VMINTUSERPERVM *PVMINTUSERPERVM;
338
339
340	/**
341	* VMCPU internal data kept in the UVM.
342	*
343	* Almost a copy of VMINTUSERPERVM. Separate data properly later on.
344	*/
345	typedef struct VMINTUSERPERVMCPU
346	{
347	/** Head of the request queue. Atomic. */
348	volatile PVMREQ pReqs;
349
350	/** The handle to the EMT thread. */
351	RTTHREAD ThreadEMT;
352	/** The native of the EMT thread. */
353	RTNATIVETHREAD NativeThreadEMT;
354	/** Wait event semaphore. */
355	RTSEMEVENT EventSemWait;
356	/** Wait/Idle indicator. */
357	bool volatile fWait;
358	/** Force EMT to terminate. */
359	bool volatile fTerminateEMT;
360	/** If set the EMT does the final VM cleanup when it exits.
361	* If clear the VMR3Destroy() caller does so. */
362	bool fEMTDoesTheCleanup;
363
364	/** @name Generic Halt data
365	* @{
366	*/
367	/** The average time (ns) between two halts in the last second. (updated once per second) */
368	uint32_t HaltInterval;
369	/** The average halt frequency for the last second. (updated once per second) */
370	uint32_t HaltFrequency;
371	/** The number of halts in the current period. */
372	uint32_t cHalts;
373	uint32_t padding; /*< alignment padding. /
374	/** When we started counting halts in cHalts (RTTimeNanoTS). */
375	uint64_t u64HaltsStartTS;
376	/** @} */
377
378	/** Union containing data and config for the different halt algorithms. */
379	union
380	{
381	/**
382	* Method 1 & 2 - Block whenever possible, and when lagging behind
383	* switch to spinning with regular blocking every 5-200ms (defaults)
384	* depending on the accumulated lag. The blocking interval is adjusted
385	* with the average oversleeping of the last 64 times.
386	*
387	* The difference between 1 and 2 is that we use native absolute
388	* time APIs for the blocking instead of the millisecond based IPRT
389	* interface.
390	*/
391	struct
392	{
393	/** How many times we've blocked while cBlockedNS and cBlockedTooLongNS has been accumulating. */
394	uint32_t cBlocks;
395	/** Avg. time spend oversleeping when blocking. (Re-calculated every so often.) */
396	uint64_t cNSBlockedTooLongAvg;
397	/** Total time spend oversleeping when blocking. */
398	uint64_t cNSBlockedTooLong;
399	/** Total time spent blocking. */
400	uint64_t cNSBlocked;
401	/** The timestamp (RTTimeNanoTS) of the last block. */
402	uint64_t u64LastBlockTS;
403
404	/** When we started spinning relentlessly in order to catch up some of the oversleeping.
405	* This is 0 when we're not spinning. */
406	uint64_t u64StartSpinTS;
407	} Method12;
408
409	#if 0
410	/**
411	* Method 3 & 4 - Same as method 1 & 2 respectivly, except that we
412	* sprinkle it with yields.
413	*/
414	struct
415	{
416	/** How many times we've blocked while cBlockedNS and cBlockedTooLongNS has been accumulating. */
417	uint32_t cBlocks;
418	/** Avg. time spend oversleeping when blocking. (Re-calculated every so often.) */
419	uint64_t cBlockedTooLongNSAvg;
420	/** Total time spend oversleeping when blocking. */
421	uint64_t cBlockedTooLongNS;
422	/** Total time spent blocking. */
423	uint64_t cBlockedNS;
424	/** The timestamp (RTTimeNanoTS) of the last block. */
425	uint64_t u64LastBlockTS;
426
427	/** How many times we've yielded while cBlockedNS and cBlockedTooLongNS has been accumulating. */
428	uint32_t cYields;
429	/** Avg. time spend oversleeping when yielding. */
430	uint32_t cYieldTooLongNSAvg;
431	/** Total time spend oversleeping when yielding. */
432	uint64_t cYieldTooLongNS;
433	/** Total time spent yielding. */
434	uint64_t cYieldedNS;
435	/** The timestamp (RTTimeNanoTS) of the last block. */
436	uint64_t u64LastYieldTS;
437
438	/** When we started spinning relentlessly in order to catch up some of the oversleeping. */
439	uint64_t u64StartSpinTS;
440	} Method34;
441	#endif
442	} Halt;
443
444	/** Profiling the halted state; yielding vs blocking.
445	* @{ */
446	STAMPROFILE StatHaltYield;
447	STAMPROFILE StatHaltBlock;
448	STAMPROFILE StatHaltTimers;
449	STAMPROFILE StatHaltPoll;
450	/** @} */
451
452	/** vmR3EmulationThread longjmp buffer. Must be last in the structure. */
453	jmp_buf emtJumpEnv;
454	} VMINTUSERPERVMCPU;
455
456	/** Pointer to the VM internal data kept in the UVM. */
457	typedef VMINTUSERPERVMCPU *PVMINTUSERPERVMCPU;
458
459	__BEGIN_DECLS
460
461	DECLCALLBACK(int) vmR3EmulationThread(RTTHREAD ThreadSelf, void *pvArg);
462	int vmR3SetHaltMethodU(PUVM pUVM, VMHALTMETHOD enmHaltMethod);
463	DECLCALLBACK(int) vmR3Destroy(PVM pVM);
464	DECLCALLBACK(void) vmR3SetErrorUV(PUVM pUVM, int rc, RT_SRC_POS_DECL, const char pszFormat, va_list args);
465	void vmSetErrorCopy(PVM pVM, int rc, RT_SRC_POS_DECL, const char *pszFormat, va_list args);
466	DECLCALLBACK(int) vmR3SetRuntimeErrorV(PVM pVM, uint32_t fFlags, const char pszErrorId, const char pszFormat, va_list *pVa);
467	void vmSetRuntimeErrorCopy(PVM pVM, uint32_t fFlags, const char pszErrorId, const char pszFormat, va_list va);
468	void vmR3DestroyFinalBitFromEMT(PUVM pUVM);
469	void vmR3SetState(PVM pVM, VMSTATE enmStateNew);
470
471	__END_DECLS
472
473
474	/** @} */
475
476	#endif
477

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source: vbox/trunk/src/VBox/VMM/VMInternal.h@ 19420

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