VMInternal.h@ 69111

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1	/* $Id: VMInternal.h 69111 2017-10-17 14:26:02Z vboxsync $ */
2	/** @file
3	* VM - Internal header file.
4	*/
5
6	/*
7	* Copyright (C) 2006-2017 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/vmm/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 immediately
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 immediately
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	/** The VM should power off instead of reset. */
167	bool fPowerOffInsteadOfReset;
168	} VMINT;
169	/** Pointer to the VM Internal Data (part of the VM structure). */
170	typedef VMINT *PVMINT;
171
172
173	#ifdef IN_RING3
174
175	/**
176	* VM internal data kept in the UVM.
177	*/
178	typedef struct VMINTUSERPERVM
179	{
180	/** Head of the standard request queue. Atomic. */
181	volatile PVMREQ pNormalReqs;
182	/** Head of the priority request queue. Atomic. */
183	volatile PVMREQ pPriorityReqs;
184	/** The last index used during alloc/free. */
185	volatile uint32_t iReqFree;
186	/** Number of free request packets. */
187	volatile uint32_t cReqFree;
188	/** Array of pointers to lists of free request packets. Atomic. */
189	volatile PVMREQ apReqFree[16 - (HC_ARCH_BITS == 32 ? 5 : 4)];
190
191	/** The reference count of the UVM handle. */
192	volatile uint32_t cUvmRefs;
193
194	/** Number of active EMTs. */
195	volatile uint32_t cActiveEmts;
196
197	# ifdef VBOX_WITH_STATISTICS
198	# if HC_ARCH_BITS == 32
199	uint32_t uPadding;
200	# endif
201	/** Number of VMR3ReqAlloc returning a new packet. */
202	STAMCOUNTER StatReqAllocNew;
203	/** Number of VMR3ReqAlloc causing races. */
204	STAMCOUNTER StatReqAllocRaces;
205	/** Number of VMR3ReqAlloc returning a recycled packet. */
206	STAMCOUNTER StatReqAllocRecycled;
207	/** Number of VMR3ReqFree calls. */
208	STAMCOUNTER StatReqFree;
209	/** Number of times the request was actually freed. */
210	STAMCOUNTER StatReqFreeOverflow;
211	/** Number of requests served. */
212	STAMCOUNTER StatReqProcessed;
213	/** Number of times there are more than one request and the others needed to be
214	* pushed back onto the list. */
215	STAMCOUNTER StatReqMoreThan1;
216	/** Number of times we've raced someone when pushing the other requests back
217	* onto the list. */
218	STAMCOUNTER StatReqPushBackRaces;
219	# endif
220
221	/** Pointer to the support library session.
222	* Mainly for creation and destruction. */
223	PSUPDRVSESSION pSession;
224
225	/** Force EMT to terminate. */
226	bool volatile fTerminateEMT;
227
228	/** Critical section for pAtState and enmPrevVMState. */
229	RTCRITSECT AtStateCritSect;
230	/** List of registered state change callbacks. */
231	PVMATSTATE pAtState;
232	/** List of registered state change callbacks. */
233	PVMATSTATE *ppAtStateNext;
234	/** The previous VM state.
235	* This is mainly used for the 'Resetting' state, but may come in handy later
236	* and when debugging. */
237	VMSTATE enmPrevVMState;
238
239	/** Reason for the most recent suspend operation. */
240	VMSUSPENDREASON enmSuspendReason;
241	/** Reason for the most recent operation. */
242	VMRESUMEREASON enmResumeReason;
243
244	/** Critical section for pAtError and pAtRuntimeError. */
245	RTCRITSECT AtErrorCritSect;
246
247	/** List of registered error callbacks. */
248	PVMATERROR pAtError;
249	/** List of registered error callbacks. */
250	PVMATERROR *ppAtErrorNext;
251	/** The error message count.
252	* This is incremented every time an error is raised. */
253	uint32_t volatile cErrors;
254
255	/** The runtime error message count.
256	* This is incremented every time a runtime error is raised. */
257	uint32_t volatile cRuntimeErrors;
258	/** List of registered error callbacks. */
259	PVMATRUNTIMEERROR pAtRuntimeError;
260	/** List of registered error callbacks. */
261	PVMATRUNTIMEERROR *ppAtRuntimeErrorNext;
262
263	/** @name Generic Halt data
264	* @{
265	*/
266	/** The current halt method.
267	* Can be selected by CFGM option 'VM/HaltMethod'. */
268	VMHALTMETHOD enmHaltMethod;
269	/** The index into g_aHaltMethods of the current halt method. */
270	uint32_t volatile iHaltMethod;
271	/** @} */
272
273	/** @todo Do NOT add new members here or reuse the current, we need to store the config for
274	* each halt method separately because we're racing on SMP guest rigs. */
275	union
276	{
277	/**
278	* Method 1 & 2 - Block whenever possible, and when lagging behind
279	* switch to spinning with regular blocking every 5-200ms (defaults)
280	* depending on the accumulated lag. The blocking interval is adjusted
281	* with the average oversleeping of the last 64 times.
282	*
283	* The difference between 1 and 2 is that we use native absolute
284	* time APIs for the blocking instead of the millisecond based IPRT
285	* interface.
286	*/
287	struct
288	{
289	/** The max interval without blocking (when spinning). */
290	uint32_t u32MinBlockIntervalCfg;
291	/** The minimum interval between blocking (when spinning). */
292	uint32_t u32MaxBlockIntervalCfg;
293	/** The value to divide the current lag by to get the raw blocking interval (when spinning). */
294	uint32_t u32LagBlockIntervalDivisorCfg;
295	/** When to start spinning (lag / nano secs). */
296	uint32_t u32StartSpinningCfg;
297	/** When to stop spinning (lag / nano secs). */
298	uint32_t u32StopSpinningCfg;
299	} Method12;
300
301	/**
302	* The GVMM manages halted and waiting EMTs.
303	*/
304	struct
305	{
306	/** The threshold between spinning and blocking. */
307	uint32_t cNsSpinBlockThresholdCfg;
308	} Global1;
309	} Halt;
310
311	/** Pointer to the DBGC instance data. */
312	void *pvDBGC;
313
314	/** TLS index for the VMINTUSERPERVMCPU pointer. */
315	RTTLS idxTLS;
316
317	/** The VM name. (Set after the config constructure has been called.) */
318	char *pszName;
319	/** The VM UUID. (Set after the config constructure has been called.) */
320	RTUUID Uuid;
321	} VMINTUSERPERVM;
322	# ifdef VBOX_WITH_STATISTICS
323	AssertCompileMemberAlignment(VMINTUSERPERVM, StatReqAllocNew, 8);
324	# endif
325
326	/** Pointer to the VM internal data kept in the UVM. */
327	typedef VMINTUSERPERVM *PVMINTUSERPERVM;
328
329
330	/**
331	* VMCPU internal data kept in the UVM.
332	*
333	* Almost a copy of VMINTUSERPERVM. Separate data properly later on.
334	*/
335	typedef struct VMINTUSERPERVMCPU
336	{
337	/** Head of the normal request queue. Atomic. */
338	volatile PVMREQ pNormalReqs;
339	/** Head of the priority request queue. Atomic. */
340	volatile PVMREQ pPriorityReqs;
341
342	/** The handle to the EMT thread. */
343	RTTHREAD ThreadEMT;
344	/** The native of the EMT thread. */
345	RTNATIVETHREAD NativeThreadEMT;
346	/** Wait event semaphore. */
347	RTSEMEVENT EventSemWait;
348	/** Wait/Idle indicator. */
349	bool volatile fWait;
350	/** Set if we've been thru vmR3Destroy and decremented the active EMT count
351	* already. */
352	bool volatile fBeenThruVmDestroy;
353	/** Align the next bit. */
354	bool afAlignment[HC_ARCH_BITS == 32 ? 2 : 6];
355
356	/** @name Generic Halt data
357	* @{
358	*/
359	/** The average time (ns) between two halts in the last second. (updated once per second) */
360	uint32_t HaltInterval;
361	/** The average halt frequency for the last second. (updated once per second) */
362	uint32_t HaltFrequency;
363	/** The number of halts in the current period. */
364	uint32_t cHalts;
365	uint32_t padding; /*< alignment padding. /
366	/** When we started counting halts in cHalts (RTTimeNanoTS). */
367	uint64_t u64HaltsStartTS;
368	/** @} */
369
370	/** Union containing data and config for the different halt algorithms. */
371	union
372	{
373	/**
374	* Method 1 & 2 - Block whenever possible, and when lagging behind
375	* switch to spinning with regular blocking every 5-200ms (defaults)
376	* depending on the accumulated lag. The blocking interval is adjusted
377	* with the average oversleeping of the last 64 times.
378	*
379	* The difference between 1 and 2 is that we use native absolute
380	* time APIs for the blocking instead of the millisecond based IPRT
381	* interface.
382	*/
383	struct
384	{
385	/** How many times we've blocked while cBlockedNS and cBlockedTooLongNS has been accumulating. */
386	uint32_t cBlocks;
387	/** Align the next member. */
388	uint32_t u32Alignment;
389	/** Avg. time spend oversleeping when blocking. (Re-calculated every so often.) */
390	uint64_t cNSBlockedTooLongAvg;
391	/** Total time spend oversleeping when blocking. */
392	uint64_t cNSBlockedTooLong;
393	/** Total time spent blocking. */
394	uint64_t cNSBlocked;
395	/** The timestamp (RTTimeNanoTS) of the last block. */
396	uint64_t u64LastBlockTS;
397
398	/** When we started spinning relentlessly in order to catch up some of the oversleeping.
399	* This is 0 when we're not spinning. */
400	uint64_t u64StartSpinTS;
401	} Method12;
402
403	# if 0
404	/**
405	* Method 3 & 4 - Same as method 1 & 2 respectivly, except that we
406	* sprinkle it with yields.
407	*/
408	struct
409	{
410	/** How many times we've blocked while cBlockedNS and cBlockedTooLongNS has been accumulating. */
411	uint32_t cBlocks;
412	/** Avg. time spend oversleeping when blocking. (Re-calculated every so often.) */
413	uint64_t cBlockedTooLongNSAvg;
414	/** Total time spend oversleeping when blocking. */
415	uint64_t cBlockedTooLongNS;
416	/** Total time spent blocking. */
417	uint64_t cBlockedNS;
418	/** The timestamp (RTTimeNanoTS) of the last block. */
419	uint64_t u64LastBlockTS;
420
421	/** How many times we've yielded while cBlockedNS and cBlockedTooLongNS has been accumulating. */
422	uint32_t cYields;
423	/** Avg. time spend oversleeping when yielding. */
424	uint32_t cYieldTooLongNSAvg;
425	/** Total time spend oversleeping when yielding. */
426	uint64_t cYieldTooLongNS;
427	/** Total time spent yielding. */
428	uint64_t cYieldedNS;
429	/** The timestamp (RTTimeNanoTS) of the last block. */
430	uint64_t u64LastYieldTS;
431
432	/** When we started spinning relentlessly in order to catch up some of the oversleeping. */
433	uint64_t u64StartSpinTS;
434	} Method34;
435	# endif
436	} Halt;
437
438	/** Profiling the halted state; yielding vs blocking.
439	* @{ */
440	STAMPROFILE StatHaltYield;
441	STAMPROFILE StatHaltBlock;
442	STAMPROFILE StatHaltBlockOverslept;
443	STAMPROFILE StatHaltBlockInsomnia;
444	STAMPROFILE StatHaltBlockOnTime;
445	STAMPROFILE StatHaltTimers;
446	STAMPROFILE StatHaltPoll;
447	/** @} */
448	} VMINTUSERPERVMCPU;
449	AssertCompileMemberAlignment(VMINTUSERPERVMCPU, u64HaltsStartTS, 8);
450	AssertCompileMemberAlignment(VMINTUSERPERVMCPU, Halt.Method12.cNSBlockedTooLongAvg, 8);
451	AssertCompileMemberAlignment(VMINTUSERPERVMCPU, StatHaltYield, 8);
452
453	/** Pointer to the VM internal data kept in the UVM. */
454	typedef VMINTUSERPERVMCPU *PVMINTUSERPERVMCPU;
455
456	#endif /* IN_RING3 */
457
458	RT_C_DECLS_BEGIN
459
460	DECLCALLBACK(int) vmR3EmulationThread(RTTHREAD ThreadSelf, void *pvArg);
461	int vmR3SetHaltMethodU(PUVM pUVM, VMHALTMETHOD enmHaltMethod);
462	DECLCALLBACK(int) vmR3Destroy(PVM pVM);
463	DECLCALLBACK(void) vmR3SetErrorUV(PUVM pUVM, int rc, RT_SRC_POS_DECL, const char pszFormat, va_list args);
464	void vmSetErrorCopy(PVM pVM, int rc, RT_SRC_POS_DECL, const char *pszFormat, va_list args);
465	DECLCALLBACK(int) vmR3SetRuntimeError(PVM pVM, uint32_t fFlags, const char pszErrorId, char pszMessage);
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 vmR3SetTerminated(PVM pVM);
469
470	RT_C_DECLS_END
471
472
473	/** @} */
474
475	#endif
476

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source: vbox/trunk/src/VBox/VMM/include/VMInternal.h@ 69111

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