VMInternal.h@ 5232

Last change on this file since 5232 was 5167, checked in by vboxsync, 17 years ago
New halt method.
Property svn:eol-style set to `native` Property svn:keywords set to `Id`
File size: 14.1 KB

Line
1	/* $Id: VMInternal.h 5167 2007-10-05 13:33:36Z vboxsync $ */
2	/** @file
3	* VM - Internal header file.
4	*/
5
6	/*
7	* Copyright (C) 2006-2007 innotek GmbH
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 as published by the Free Software Foundation,
13	* in version 2 as it comes in the "COPYING" file of the VirtualBox OSE
14	* distribution. VirtualBox OSE is distributed in the hope that it will
15	* 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 <setjmp.h>
24
25	#if !defined(IN_VM_R3) && !defined(IN_VM_R0) && !defined(IN_VM_GC)
26	# error "Not in VM! This is an internal header!"
27	#endif
28
29
30	/** @defgroup grp_vm_int Internals
31	* @ingroup grp_vm
32	* @internal
33	* @{
34	*/
35
36
37	/**
38	* At-reset callback type.
39	*/
40	typedef enum VMATRESETTYPE
41	{
42	/** Device callback. */
43	VMATRESETTYPE_DEV = 1,
44	/** Internal callback . */
45	VMATRESETTYPE_INTERNAL,
46	/** External callback. */
47	VMATRESETTYPE_EXTERNAL
48	} VMATRESETTYPE;
49
50
51	/** Pointer to at-reset callback. */
52	typedef struct VMATRESET *PVMATRESET;
53
54	/**
55	* At reset callback.
56	*/
57	typedef struct VMATRESET
58	{
59	/** Pointer to the next one in the list. */
60	PVMATRESET pNext;
61	/** Callback type. */
62	VMATRESETTYPE enmType;
63	/** User argument for the callback. */
64	void *pvUser;
65	/** Description. */
66	const char *pszDesc;
67	/** Type specific data. */
68	union
69	{
70	/** VMATRESETTYPE_DEV. */
71	struct
72	{
73	/** Callback. */
74	PFNVMATRESET pfnCallback;
75	/** Device instance. */
76	PPDMDEVINS pDevIns;
77	} Dev;
78
79	/** VMATRESETTYPE_INTERNAL. */
80	struct
81	{
82	/** Callback. */
83	PFNVMATRESETINT pfnCallback;
84	} Internal;
85
86	/** VMATRESETTYPE_EXTERNAL. */
87	struct
88	{
89	/** Callback. */
90	PFNVMATRESETEXT pfnCallback;
91	} External;
92	} u;
93	} VMATRESET;
94
95
96	/**
97	* VM state change callback.
98	*/
99	typedef struct VMATSTATE
100	{
101	/** Pointer to the next one. */
102	struct VMATSTATE *pNext;
103	/** Pointer to the callback. */
104	PFNVMATSTATE pfnAtState;
105	/** The user argument. */
106	void *pvUser;
107	} VMATSTATE;
108	/** Pointer to a VM state change callback. */
109	typedef VMATSTATE *PVMATSTATE;
110
111
112	/**
113	* VM error callback.
114	*/
115	typedef struct VMATERROR
116	{
117	/** Pointer to the next one. */
118	struct VMATERROR *pNext;
119	/** Pointer to the callback. */
120	PFNVMATERROR pfnAtError;
121	/** The user argument. */
122	void *pvUser;
123	} VMATERROR;
124	/** Pointer to a VM error callback. */
125	typedef VMATERROR *PVMATERROR;
126
127
128	/**
129	* Chunk of memory allocated off the hypervisor heap in which
130	* we copy the error details.
131	*/
132	typedef struct VMERROR
133	{
134	/** The size of the chunk. */
135	uint32_t cbAllocated;
136	/** The current offset into the chunk.
137	* We start by putting the filename and function immediatly
138	* after the end of the buffer. */
139	uint32_t off;
140	/** Offset from the start of this structure to the file name. */
141	uint32_t offFile;
142	/** The line number. */
143	uint32_t iLine;
144	/** Offset from the start of this structure to the function name. */
145	uint32_t offFunction;
146	/** Offset from the start of this structure to the formatted message text. */
147	uint32_t offMessage;
148	/** The VBox status code. */
149	int32_t rc;
150	} VMERROR, *PVMERROR;
151
152
153	/**
154	* VM runtime error callback.
155	*/
156	typedef struct VMATRUNTIMEERROR
157	{
158	/** Pointer to the next one. */
159	struct VMATRUNTIMEERROR *pNext;
160	/** Pointer to the callback. */
161	PFNVMATRUNTIMEERROR pfnAtRuntimeError;
162	/** The user argument. */
163	void *pvUser;
164	} VMATRUNTIMEERROR;
165	/** Pointer to a VM error callback. */
166	typedef VMATRUNTIMEERROR *PVMATRUNTIMEERROR;
167
168
169	/**
170	* Chunk of memory allocated off the hypervisor heap in which
171	* we copy the runtime error details.
172	*/
173	typedef struct VMRUNTIMEERROR
174	{
175	/** The size of the chunk. */
176	uint32_t cbAllocated;
177	/** The current offset into the chunk.
178	* We start by putting the error ID immediatly
179	* after the end of the buffer. */
180	uint32_t off;
181	/** Offset from the start of this structure to the error ID. */
182	uint32_t offErrorID;
183	/** Offset from the start of this structure to the formatted message text. */
184	uint32_t offMessage;
185	/** Whether the error is fatal or not */
186	bool fFatal;
187	} VMRUNTIMEERROR, *PVMRUNTIMEERROR;
188
189	/** The halt method. */
190	typedef enum
191	{
192	/** The usual invalid value. */
193	VMHALTMETHOD_INVALID = 0,
194	/** Use the default method. */
195	VMHALTMETHOD_DEFAULT,
196	/** The old spin/yield/block method. */
197	VMHALTMETHOD_OLD,
198	/** The first go at a block/spin method. */
199	VMHALTMETHOD_1,
200	/** The first go at a more global approach. */
201	VMHALTMETHOD_GLOBAL_1,
202	/** The end of valid methods. (not inclusive of course) */
203	VMHALTMETHOD_END,
204	/** The usual 32-bit max value. */
205	VMHALTMETHOD_32BIT_HACK = 0x7fffffff
206	} VMHALTMETHOD;
207
208
209	/**
210	* Converts a VMM pointer into a VM pointer.
211	* @returns Pointer to the VM structure the VMM is part of.
212	* @param pVMM Pointer to VMM instance data.
213	*/
214	#define VMINT2VM(pVMM) ( (PVM)((char*)pVMM - pVMM->offVM) )
215
216
217	/**
218	* VM Internal Data (part of VM)
219	*/
220	typedef struct VMINT
221	{
222	/** Offset to the VM structure.
223	* See VMINT2VM(). */
224	RTINT offVM;
225
226	/** List of registered reset callbacks. */
227	R3PTRTYPE(PVMATRESET) pAtReset;
228	/** List of registered reset callbacks. */
229	R3PTRTYPE(PVMATRESET *) ppAtResetNext;
230
231	/** List of registered state change callbacks. */
232	R3PTRTYPE(PVMATSTATE) pAtState;
233	/** List of registered state change callbacks. */
234	R3PTRTYPE(PVMATSTATE *) ppAtStateNext;
235
236	/** List of registered error callbacks. */
237	R3PTRTYPE(PVMATERROR) pAtError;
238	/** List of registered error callbacks. */
239	R3PTRTYPE(PVMATERROR *) ppAtErrorNext;
240
241	/** List of registered error callbacks. */
242	R3PTRTYPE(PVMATRUNTIMEERROR) pAtRuntimeError;
243	/** List of registered error callbacks. */
244	R3PTRTYPE(PVMATRUNTIMEERROR *) ppAtRuntimeErrorNext;
245
246	/** Head of the request queue. Atomic. */
247	volatile R3PTRTYPE(PVMREQ) pReqs;
248	/** The last index used during alloc/free. */
249	volatile uint32_t iReqFree;
250	/** Array of pointers to lists of free request packets. Atomic. */
251	volatile R3PTRTYPE(PVMREQ) apReqFree[9];
252	/** Number of free request packets. */
253	volatile uint32_t cReqFree;
254
255	/** Wait/Idle indicator. */
256	volatile uint32_t fWait;
257	/** Wait event semaphore. */
258	R3PTRTYPE(RTSEMEVENT) EventSemWait;
259
260	/** VM Error Message. */
261	R3PTRTYPE(PVMERROR) pErrorR3;
262
263	/** VM Runtime Error Message. */
264	R3PTRTYPE(PVMRUNTIMEERROR) pRuntimeErrorR3;
265
266	/** Pointer to the DBGC instance data. */
267	R3PTRTYPE(void *) pvDBGC;
268
269	/** If set the EMT does the final VM cleanup when it exits.
270	* If clear the VMR3Destroy() caller does so. */
271	bool fEMTDoesTheCleanup;
272
273	/** Set by VMR3SuspendNoSave; cleared by VMR3Resume; signals the VM is in an inconsistent state and saving is not allowed. */
274	bool fPreventSaveState;
275
276	/** vmR3EmulationThread longjmp buffer
277	* @todo r=bird: requires union with padding. See EMInternal.h. */
278	jmp_buf emtJumpEnv;
279
280	/** @name Generic Halt data
281	* @{
282	*/
283	/** The current halt method.
284	* Can be selected by CFGM option 'VM/HaltMethod'. */
285	VMHALTMETHOD enmHaltMethod;
286	/** The index into g_aHaltMethods of the current halt method. */
287	uint32_t volatile iHaltMethod;
288	/** The average time (ns) between two halts in the last second. (updated once per second) */
289	uint32_t HaltInterval;
290	/** The average halt frequency for the last second. (updated once per second) */
291	uint32_t HaltFrequency;
292	/** The number of halts in the current period. */
293	uint32_t cHalts;
294	uint32_t padding; /*< alignment padding. /
295	/** When we started counting halts in cHalts (RTTimeNanoTS). */
296	uint64_t u64HaltsStartTS;
297	/** @} */
298
299	/** Union containing data and config for the different halt algorithms. */
300	union
301	{
302	/**
303	* Method 1 & 2 - Block whenever possible, and when lagging behind
304	* switch to spinning with regular blocking every 5-200ms (defaults)
305	* depending on the accumulated lag. The blocking interval is adjusted
306	* with the average oversleeping of the last 64 times.
307	*
308	* The difference between 1 and 2 is that we use native absolute
309	* time APIs for the blocking instead of the millisecond based IPRT
310	* interface.
311	*/
312	struct
313	{
314	/** How many times we've blocked while cBlockedNS and cBlockedTooLongNS has been accumulating. */
315	uint32_t cBlocks;
316	/** Avg. time spend oversleeping when blocking. (Re-calculated every so often.) */
317	uint64_t cNSBlockedTooLongAvg;
318	/** Total time spend oversleeping when blocking. */
319	uint64_t cNSBlockedTooLong;
320	/** Total time spent blocking. */
321	uint64_t cNSBlocked;
322	/** The timestamp (RTTimeNanoTS) of the last block. */
323	uint64_t u64LastBlockTS;
324
325	/** When we started spinning relentlessly in order to catch up some of the oversleeping.
326	* This is 0 when we're not spinning. */
327	uint64_t u64StartSpinTS;
328
329	/** The max interval without blocking (when spinning). */
330	uint32_t u32MinBlockIntervalCfg;
331	/** The minimum interval between blocking (when spinning). */
332	uint32_t u32MaxBlockIntervalCfg;
333	/** The value to divide the current lag by to get the raw blocking interval (when spinning). */
334	uint32_t u32LagBlockIntervalDivisorCfg;
335	/** When to start spinning (lag / nano secs). */
336	uint32_t u32StartSpinningCfg;
337	/** When to stop spinning (lag / nano secs). */
338	uint32_t u32StopSpinningCfg;
339	} Method12;
340
341	#if 0
342	/**
343	* Method 3 & 4 - Same as method 1 & 2 respectivly, except that we
344	* sprinkle it with yields.
345	*/
346	struct
347	{
348	/** How many times we've blocked while cBlockedNS and cBlockedTooLongNS has been accumulating. */
349	uint32_t cBlocks;
350	/** Avg. time spend oversleeping when blocking. (Re-calculated every so often.) */
351	uint64_t cBlockedTooLongNSAvg;
352	/** Total time spend oversleeping when blocking. */
353	uint64_t cBlockedTooLongNS;
354	/** Total time spent blocking. */
355	uint64_t cBlockedNS;
356	/** The timestamp (RTTimeNanoTS) of the last block. */
357	uint64_t u64LastBlockTS;
358
359	/** How many times we've yielded while cBlockedNS and cBlockedTooLongNS has been accumulating. */
360	uint32_t cYields;
361	/** Avg. time spend oversleeping when yielding. */
362	uint32_t cYieldTooLongNSAvg;
363	/** Total time spend oversleeping when yielding. */
364	uint64_t cYieldTooLongNS;
365	/** Total time spent yielding. */
366	uint64_t cYieldedNS;
367	/** The timestamp (RTTimeNanoTS) of the last block. */
368	uint64_t u64LastYieldTS;
369
370	/** When we started spinning relentlessly in order to catch up some of the oversleeping. */
371	uint64_t u64StartSpinTS;
372	} Method34;
373	#endif
374	} Halt;
375
376	/** @} */
377
378	/** Number of VMR3ReqAlloc returning a new packet. */
379	STAMCOUNTER StatReqAllocNew;
380	/** Number of VMR3ReqAlloc causing races. */
381	STAMCOUNTER StatReqAllocRaces;
382	/** Number of VMR3ReqAlloc returning a recycled packet. */
383	STAMCOUNTER StatReqAllocRecycled;
384	/** Number of VMR3ReqFree calls. */
385	STAMCOUNTER StatReqFree;
386	/** Number of times the request was actually freed. */
387	STAMCOUNTER StatReqFreeOverflow;
388
389	/** Profiling the halted state; yielding vs blocking. */
390	STAMPROFILE StatHaltYield;
391	STAMPROFILE StatHaltBlock;
392	STAMPROFILE StatHaltTimers;
393	STAMPROFILE StatHaltPoll;
394	} VMINT, *PVMINT;
395
396
397	/**
398	* Emulation thread arguments.
399	*/
400	typedef struct VMEMULATIONTHREADARGS
401	{
402	/** Pointer to the VM structure. */
403	PVM pVM;
404	} VMEMULATIONTHREADARGS;
405	/** Pointer to the emulation thread arguments. */
406	typedef VMEMULATIONTHREADARGS *PVMEMULATIONTHREADARGS;
407
408	DECLCALLBACK(int) vmR3EmulationThread(RTTHREAD ThreadSelf, void *pvArg);
409	int vmR3SetHaltMethod(PVM pVM, VMHALTMETHOD enmHaltMethod);
410	DECLCALLBACK(int) vmR3Destroy(PVM pVM);
411	DECLCALLBACK(void) vmR3SetErrorV(PVM pVM, int rc, RT_SRC_POS_DECL, const char pszFormat, va_list args);
412	void vmSetErrorCopy(PVM pVM, int rc, RT_SRC_POS_DECL, const char *pszFormat, va_list args);
413	DECLCALLBACK(void) vmR3SetRuntimeErrorV(PVM pVM, bool fFatal, const char pszErrorID, const char pszFormat, va_list *args);
414	void vmSetRuntimeErrorCopy(PVM pVM, bool fFatal, const char pszErrorID, const char pszFormat, va_list args);
415	void vmR3DestroyFinalBit(PVM pVM);
416	void vmR3SetState(PVM pVM, VMSTATE enmStateNew);
417
418
419	/** @} */
420
421	#endif
422

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source: vbox/trunk/src/VBox/VMM/VMInternal.h@ 5232

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