VMInternal.h@ 28879

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1	/* $Id: VMInternal.h 28800 2010-04-27 08:22:32Z vboxsync $ */
2	/** @file
3	* VM - 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 ___VMInternal_h
19	#define ___VMInternal_h
20
21	#include <VBox/cdefs.h>
22	#include <VBox/vmapi.h>
23	#include <iprt/assert.h>
24	#include <iprt/critsect.h>
25	#include <setjmp.h>
26
27
28
29	/** @defgroup grp_vm_int Internals
30	* @ingroup grp_vm
31	* @internal
32	* @{
33	*/
34
35
36	/**
37	* VM state change callback.
38	*/
39	typedef struct VMATSTATE
40	{
41	/** Pointer to the next one. */
42	struct VMATSTATE *pNext;
43	/** Pointer to the callback. */
44	PFNVMATSTATE pfnAtState;
45	/** The user argument. */
46	void *pvUser;
47	} VMATSTATE;
48	/** Pointer to a VM state change callback. */
49	typedef VMATSTATE *PVMATSTATE;
50
51
52	/**
53	* VM error callback.
54	*/
55	typedef struct VMATERROR
56	{
57	/** Pointer to the next one. */
58	struct VMATERROR *pNext;
59	/** Pointer to the callback. */
60	PFNVMATERROR pfnAtError;
61	/** The user argument. */
62	void *pvUser;
63	} VMATERROR;
64	/** Pointer to a VM error callback. */
65	typedef VMATERROR *PVMATERROR;
66
67
68	/**
69	* Chunk of memory allocated off the hypervisor heap in which
70	* we copy the error details.
71	*/
72	typedef struct VMERROR
73	{
74	/** The size of the chunk. */
75	uint32_t cbAllocated;
76	/** The current offset into the chunk.
77	* We start by putting the filename and function immediatly
78	* after the end of the buffer. */
79	uint32_t off;
80	/** Offset from the start of this structure to the file name. */
81	uint32_t offFile;
82	/** The line number. */
83	uint32_t iLine;
84	/** Offset from the start of this structure to the function name. */
85	uint32_t offFunction;
86	/** Offset from the start of this structure to the formatted message text. */
87	uint32_t offMessage;
88	/** The VBox status code. */
89	int32_t rc;
90	} VMERROR, *PVMERROR;
91
92
93	/**
94	* VM runtime error callback.
95	*/
96	typedef struct VMATRUNTIMEERROR
97	{
98	/** Pointer to the next one. */
99	struct VMATRUNTIMEERROR *pNext;
100	/** Pointer to the callback. */
101	PFNVMATRUNTIMEERROR pfnAtRuntimeError;
102	/** The user argument. */
103	void *pvUser;
104	} VMATRUNTIMEERROR;
105	/** Pointer to a VM error callback. */
106	typedef VMATRUNTIMEERROR *PVMATRUNTIMEERROR;
107
108
109	/**
110	* Chunk of memory allocated off the hypervisor heap in which
111	* we copy the runtime error details.
112	*/
113	typedef struct VMRUNTIMEERROR
114	{
115	/** The size of the chunk. */
116	uint32_t cbAllocated;
117	/** The current offset into the chunk.
118	* We start by putting the error ID immediatly
119	* after the end of the buffer. */
120	uint32_t off;
121	/** Offset from the start of this structure to the error ID. */
122	uint32_t offErrorId;
123	/** Offset from the start of this structure to the formatted message text. */
124	uint32_t offMessage;
125	/** Error flags. */
126	uint32_t fFlags;
127	} VMRUNTIMEERROR, *PVMRUNTIMEERROR;
128
129	/** The halt method. */
130	typedef enum
131	{
132	/** The usual invalid value. */
133	VMHALTMETHOD_INVALID = 0,
134	/** Use the method used during bootstrapping. */
135	VMHALTMETHOD_BOOTSTRAP,
136	/** Use the default method. */
137	VMHALTMETHOD_DEFAULT,
138	/** The old spin/yield/block method. */
139	VMHALTMETHOD_OLD,
140	/** The first go at a block/spin method. */
141	VMHALTMETHOD_1,
142	/** The first go at a more global approach. */
143	VMHALTMETHOD_GLOBAL_1,
144	/** The end of valid methods. (not inclusive of course) */
145	VMHALTMETHOD_END,
146	/** The usual 32-bit max value. */
147	VMHALTMETHOD_32BIT_HACK = 0x7fffffff
148	} VMHALTMETHOD;
149
150
151	/**
152	* VM Internal Data (part of the VM structure).
153	*
154	* @todo Move this and all related things to VMM. The VM component was, to some
155	* extent at least, a bad ad hoc design which should all have been put in
156	* VMM. @see pg_vm.
157	*/
158	typedef struct VMINT
159	{
160	/** VM Error Message. */
161	R3PTRTYPE(PVMERROR) pErrorR3;
162	/** VM Runtime Error Message. */
163	R3PTRTYPE(PVMRUNTIMEERROR) pRuntimeErrorR3;
164	/** The VM was/is-being teleported and has not yet been fully resumed. */
165	bool fTeleportedAndNotFullyResumedYet;
166	} VMINT;
167	/** Pointer to the VM Internal Data (part of the VM structure). */
168	typedef VMINT *PVMINT;
169
170
171	/**
172	* VM internal data kept in the UVM.
173	*/
174	typedef struct VMINTUSERPERVM
175	{
176	/** Head of the request queue. Atomic. */
177	volatile PVMREQ pReqs;
178	/** The last index used during alloc/free. */
179	volatile uint32_t iReqFree;
180	/** Number of free request packets. */
181	volatile uint32_t cReqFree;
182	/** Array of pointers to lists of free request packets. Atomic. */
183	volatile PVMREQ apReqFree[9];
184
185	#ifdef VBOX_WITH_STATISTICS
186	/** Number of VMR3ReqAlloc returning a new packet. */
187	STAMCOUNTER StatReqAllocNew;
188	/** Number of VMR3ReqAlloc causing races. */
189	STAMCOUNTER StatReqAllocRaces;
190	/** Number of VMR3ReqAlloc returning a recycled packet. */
191	STAMCOUNTER StatReqAllocRecycled;
192	/** Number of VMR3ReqFree calls. */
193	STAMCOUNTER StatReqFree;
194	/** Number of times the request was actually freed. */
195	STAMCOUNTER StatReqFreeOverflow;
196	/** Number of requests served. */
197	STAMCOUNTER StatReqProcessed;
198	/** Number of times there are more than one request and the others needed to be
199	* pushed back onto the list. */
200	STAMCOUNTER StatReqMoreThan1;
201	/** Number of times we've raced someone when pushing the other requests back
202	* onto the list. */
203	STAMCOUNTER StatReqPushBackRaces;
204	#endif
205
206	/** Pointer to the support library session.
207	* Mainly for creation and destruction. */
208	PSUPDRVSESSION pSession;
209
210	/** Force EMT to terminate. */
211	bool volatile fTerminateEMT;
212	/** If set the EMT(0) does the final VM cleanup when it exits.
213	* If clear the VMR3Destroy() caller does so. */
214	bool fEMTDoesTheCleanup;
215
216	/** Critical section for pAtState and enmPrevVMState. */
217	RTCRITSECT AtStateCritSect;
218	/** List of registered state change callbacks. */
219	PVMATSTATE pAtState;
220	/** List of registered state change callbacks. */
221	PVMATSTATE *ppAtStateNext;
222	/** The previous VM state.
223	* This is mainly used for the 'Resetting' state, but may come in handy later
224	* and when debugging. */
225	VMSTATE enmPrevVMState;
226
227	/** Critical section for pAtError and pAtRuntimeError. */
228	RTCRITSECT AtErrorCritSect;
229
230	/** List of registered error callbacks. */
231	PVMATERROR pAtError;
232	/** List of registered error callbacks. */
233	PVMATERROR *ppAtErrorNext;
234	/** The error message count.
235	* This is incremented every time an error is raised. */
236	uint32_t volatile cErrors;
237
238	/** The runtime error message count.
239	* This is incremented every time a runtime error is raised. */
240	uint32_t volatile cRuntimeErrors;
241	/** List of registered error callbacks. */
242	PVMATRUNTIMEERROR pAtRuntimeError;
243	/** List of registered error callbacks. */
244	PVMATRUNTIMEERROR *ppAtRuntimeErrorNext;
245
246	/** @name Generic Halt data
247	* @{
248	*/
249	/** The current halt method.
250	* Can be selected by CFGM option 'VM/HaltMethod'. */
251	VMHALTMETHOD enmHaltMethod;
252	/** The index into g_aHaltMethods of the current halt method. */
253	uint32_t volatile iHaltMethod;
254	/** @} */
255
256	/** @todo Do NOT add new members here or resue the current, we need to store the config for
257	* each halt method seperately because we're racing on SMP guest rigs. */
258	union
259	{
260	/**
261	* Method 1 & 2 - Block whenever possible, and when lagging behind
262	* switch to spinning with regular blocking every 5-200ms (defaults)
263	* depending on the accumulated lag. The blocking interval is adjusted
264	* with the average oversleeping of the last 64 times.
265	*
266	* The difference between 1 and 2 is that we use native absolute
267	* time APIs for the blocking instead of the millisecond based IPRT
268	* interface.
269	*/
270	struct
271	{
272	/** The max interval without blocking (when spinning). */
273	uint32_t u32MinBlockIntervalCfg;
274	/** The minimum interval between blocking (when spinning). */
275	uint32_t u32MaxBlockIntervalCfg;
276	/** The value to divide the current lag by to get the raw blocking interval (when spinning). */
277	uint32_t u32LagBlockIntervalDivisorCfg;
278	/** When to start spinning (lag / nano secs). */
279	uint32_t u32StartSpinningCfg;
280	/** When to stop spinning (lag / nano secs). */
281	uint32_t u32StopSpinningCfg;
282	} Method12;
283	} Halt;
284
285	/** Pointer to the DBGC instance data. */
286	void *pvDBGC;
287
288	/** TLS index for the VMINTUSERPERVMCPU pointer. */
289	RTTLS idxTLS;
290	} VMINTUSERPERVM;
291
292	/** Pointer to the VM internal data kept in the UVM. */
293	typedef VMINTUSERPERVM *PVMINTUSERPERVM;
294
295
296	/**
297	* VMCPU internal data kept in the UVM.
298	*
299	* Almost a copy of VMINTUSERPERVM. Separate data properly later on.
300	*/
301	typedef struct VMINTUSERPERVMCPU
302	{
303	/** Head of the request queue. Atomic. */
304	volatile PVMREQ pReqs;
305
306	/** The handle to the EMT thread. */
307	RTTHREAD ThreadEMT;
308	/** The native of the EMT thread. */
309	RTNATIVETHREAD NativeThreadEMT;
310	/** Wait event semaphore. */
311	RTSEMEVENT EventSemWait;
312	/** Wait/Idle indicator. */
313	bool volatile fWait;
314	/** Force EMT to terminate. */
315	bool volatile fTerminateEMT;
316	/** If set the EMT does the final VM cleanup when it exits.
317	* If clear the VMR3Destroy() caller does so. */
318	bool fEMTDoesTheCleanup;
319	/** Align the next bit. */
320	bool afAlignment[5];
321
322	/** @name Generic Halt data
323	* @{
324	*/
325	/** The average time (ns) between two halts in the last second. (updated once per second) */
326	uint32_t HaltInterval;
327	/** The average halt frequency for the last second. (updated once per second) */
328	uint32_t HaltFrequency;
329	/** The number of halts in the current period. */
330	uint32_t cHalts;
331	uint32_t padding; /*< alignment padding. /
332	/** When we started counting halts in cHalts (RTTimeNanoTS). */
333	uint64_t u64HaltsStartTS;
334	/** @} */
335
336	/** Union containing data and config for the different halt algorithms. */
337	union
338	{
339	/**
340	* Method 1 & 2 - Block whenever possible, and when lagging behind
341	* switch to spinning with regular blocking every 5-200ms (defaults)
342	* depending on the accumulated lag. The blocking interval is adjusted
343	* with the average oversleeping of the last 64 times.
344	*
345	* The difference between 1 and 2 is that we use native absolute
346	* time APIs for the blocking instead of the millisecond based IPRT
347	* interface.
348	*/
349	struct
350	{
351	/** How many times we've blocked while cBlockedNS and cBlockedTooLongNS has been accumulating. */
352	uint32_t cBlocks;
353	/** Align the next member. */
354	uint32_t u32Alignment;
355	/** Avg. time spend oversleeping when blocking. (Re-calculated every so often.) */
356	uint64_t cNSBlockedTooLongAvg;
357	/** Total time spend oversleeping when blocking. */
358	uint64_t cNSBlockedTooLong;
359	/** Total time spent blocking. */
360	uint64_t cNSBlocked;
361	/** The timestamp (RTTimeNanoTS) of the last block. */
362	uint64_t u64LastBlockTS;
363
364	/** When we started spinning relentlessly in order to catch up some of the oversleeping.
365	* This is 0 when we're not spinning. */
366	uint64_t u64StartSpinTS;
367	} Method12;
368
369	#if 0
370	/**
371	* Method 3 & 4 - Same as method 1 & 2 respectivly, except that we
372	* sprinkle it with yields.
373	*/
374	struct
375	{
376	/** How many times we've blocked while cBlockedNS and cBlockedTooLongNS has been accumulating. */
377	uint32_t cBlocks;
378	/** Avg. time spend oversleeping when blocking. (Re-calculated every so often.) */
379	uint64_t cBlockedTooLongNSAvg;
380	/** Total time spend oversleeping when blocking. */
381	uint64_t cBlockedTooLongNS;
382	/** Total time spent blocking. */
383	uint64_t cBlockedNS;
384	/** The timestamp (RTTimeNanoTS) of the last block. */
385	uint64_t u64LastBlockTS;
386
387	/** How many times we've yielded while cBlockedNS and cBlockedTooLongNS has been accumulating. */
388	uint32_t cYields;
389	/** Avg. time spend oversleeping when yielding. */
390	uint32_t cYieldTooLongNSAvg;
391	/** Total time spend oversleeping when yielding. */
392	uint64_t cYieldTooLongNS;
393	/** Total time spent yielding. */
394	uint64_t cYieldedNS;
395	/** The timestamp (RTTimeNanoTS) of the last block. */
396	uint64_t u64LastYieldTS;
397
398	/** When we started spinning relentlessly in order to catch up some of the oversleeping. */
399	uint64_t u64StartSpinTS;
400	} Method34;
401	#endif
402	} Halt;
403
404	/** Profiling the halted state; yielding vs blocking.
405	* @{ */
406	STAMPROFILE StatHaltYield;
407	STAMPROFILE StatHaltBlock;
408	STAMPROFILE StatHaltTimers;
409	STAMPROFILE StatHaltPoll;
410	/** @} */
411	} VMINTUSERPERVMCPU;
412	#ifdef IN_RING3
413	AssertCompileMemberAlignment(VMINTUSERPERVMCPU, u64HaltsStartTS, 8);
414	AssertCompileMemberAlignment(VMINTUSERPERVMCPU, Halt.Method12.cNSBlockedTooLongAvg, 8);
415	AssertCompileMemberAlignment(VMINTUSERPERVMCPU, StatHaltYield, 8);
416	#endif
417
418	/** Pointer to the VM internal data kept in the UVM. */
419	typedef VMINTUSERPERVMCPU *PVMINTUSERPERVMCPU;
420
421	RT_C_DECLS_BEGIN
422
423	DECLCALLBACK(int) vmR3EmulationThread(RTTHREAD ThreadSelf, void *pvArg);
424	int vmR3SetHaltMethodU(PUVM pUVM, VMHALTMETHOD enmHaltMethod);
425	DECLCALLBACK(int) vmR3Destroy(PVM pVM);
426	DECLCALLBACK(void) vmR3SetErrorUV(PUVM pUVM, int rc, RT_SRC_POS_DECL, const char pszFormat, va_list args);
427	void vmSetErrorCopy(PVM pVM, int rc, RT_SRC_POS_DECL, const char *pszFormat, va_list args);
428	DECLCALLBACK(int) vmR3SetRuntimeError(PVM pVM, uint32_t fFlags, const char pszErrorId, char pszMessage);
429	DECLCALLBACK(int) vmR3SetRuntimeErrorV(PVM pVM, uint32_t fFlags, const char pszErrorId, const char pszFormat, va_list *pVa);
430	void vmSetRuntimeErrorCopy(PVM pVM, uint32_t fFlags, const char pszErrorId, const char pszFormat, va_list va);
431	void vmR3DestroyFinalBitFromEMT(PUVM pUVM, VMCPUID idCpu);
432	void vmR3SetGuruMeditation(PVM pVM);
433
434	RT_C_DECLS_END
435
436
437	/** @} */
438
439	#endif
440

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source: vbox/trunk/src/VBox/VMM/VMInternal.h@ 28879

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