VMEmt.cpp@ 18619

Last change on this file since 18619 was 18619, checked in by vboxsync, 16 years ago
PDM,EM: Killed PDMR3Poll. RIP.
Property svn:eol-style set to `native` Property svn:keywords set to `Id`
File size: 37.3 KB

Line
1	/* $Id: VMEmt.cpp 18619 2009-04-01 22:14:47Z vboxsync $ */
2	/** @file
3	* VM - Virtual Machine, The Emulation Thread.
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
23	/*******************************************************************************
24	* Header Files *
25	*******************************************************************************/
26	#define LOG_GROUP LOG_GROUP_VM
27	#include <VBox/tm.h>
28	#include <VBox/dbgf.h>
29	#include <VBox/em.h>
30	#include <VBox/pdmapi.h>
31	#include <VBox/rem.h>
32	#include <VBox/tm.h>
33	#include "VMInternal.h"
34	#include <VBox/vm.h>
35	#include <VBox/uvm.h>
36
37	#include <VBox/err.h>
38	#include <VBox/log.h>
39	#include <iprt/assert.h>
40	#include <iprt/asm.h>
41	#include <iprt/semaphore.h>
42	#include <iprt/string.h>
43	#include <iprt/thread.h>
44	#include <iprt/time.h>
45
46
47	/**
48	* The emulation thread.
49	*
50	* @returns Thread exit code.
51	* @param ThreadSelf The handle to the executing thread.
52	* @param pvArgs Pointer to the user mode VM structure (UVM).
53	*/
54	DECLCALLBACK(int) vmR3EmulationThread(RTTHREAD ThreadSelf, void *pvArgs)
55	{
56	PUVMCPU pUVMCPU = (PUVMCPU)pvArgs;
57	PUVM pUVM = pUVMCPU->pUVM;
58	RTCPUID idCpu = pUVMCPU->idCpu;
59	int rc;
60
61	AssertReleaseMsg(VALID_PTR(pUVM) && pUVM->u32Magic == UVM_MAGIC,
62	("Invalid arguments to the emulation thread!\n"));
63
64	rc = RTTlsSet(pUVM->vm.s.idxTLS, pUVMCPU);
65	AssertReleaseMsgRCReturn(rc, ("RTTlsSet %x failed with %Rrc\n", pUVM->vm.s.idxTLS, rc), rc);
66
67	/*
68	* The request loop.
69	*/
70	rc = VINF_SUCCESS;
71	volatile VMSTATE enmBefore = VMSTATE_CREATING; /* volatile because of setjmp */
72	Log(("vmR3EmulationThread: Emulation thread starting the days work... Thread=%#x pUVM=%p\n", ThreadSelf, pUVM));
73	for (;;)
74	{
75	/* Requested to exit the EMT thread out of sync? (currently only VMR3WaitForResume) */
76	if (setjmp(pUVMCPU->vm.s.emtJumpEnv) != 0)
77	{
78	rc = VINF_SUCCESS;
79	break;
80	}
81
82	/*
83	* During early init there is no pVM, so make a special path
84	* for that to keep things clearly separate.
85	*/
86	if (!pUVM->pVM)
87	{
88	/*
89	* Check for termination first.
90	*/
91	if (pUVM->vm.s.fTerminateEMT)
92	{
93	rc = VINF_EM_TERMINATE;
94	break;
95	}
96	if (pUVM->vm.s.pReqs)
97	{
98	/*
99	* Service execute in EMT request.
100	*/
101	rc = VMR3ReqProcessU(pUVM, VMREQDEST_ANY);
102	Log(("vmR3EmulationThread: Req rc=%Rrc, VM state %d -> %d\n", rc, enmBefore, pUVM->pVM ? pUVM->pVM->enmVMState : VMSTATE_CREATING));
103	}
104	else
105	{
106	/*
107	* Nothing important is pending, so wait for something.
108	*/
109	rc = VMR3WaitU(pUVM);
110	if (RT_FAILURE(rc))
111	break;
112	}
113	}
114	else
115	{
116
117	/*
118	* Pending requests which needs servicing?
119	*
120	* We check for state changes in addition to status codes when
121	* servicing requests. (Look after the ifs.)
122	*/
123	PVM pVM = pUVM->pVM;
124	enmBefore = pVM->enmVMState;
125	if ( VM_FF_ISSET(pVM, VM_FF_TERMINATE)
126	\|\| pUVM->vm.s.fTerminateEMT)
127	{
128	rc = VINF_EM_TERMINATE;
129	break;
130	}
131	if (pUVM->vm.s.pReqs)
132	{
133	/*
134	* Service execute in EMT request.
135	*/
136	rc = VMR3ReqProcessU(pUVM, VMREQDEST_ANY);
137	Log(("vmR3EmulationThread: Req rc=%Rrc, VM state %d -> %d\n", rc, enmBefore, pVM->enmVMState));
138	}
139	else if (VM_FF_ISSET(pVM, VM_FF_DBGF))
140	{
141	/*
142	* Service the debugger request.
143	*/
144	rc = DBGFR3VMMForcedAction(pVM);
145	Log(("vmR3EmulationThread: Dbg rc=%Rrc, VM state %d -> %d\n", rc, enmBefore, pVM->enmVMState));
146	}
147	else if (VM_FF_ISSET(pVM, VM_FF_RESET))
148	{
149	/*
150	* Service a delayed reset request.
151	*/
152	rc = VMR3Reset(pVM);
153	VM_FF_CLEAR(pVM, VM_FF_RESET);
154	Log(("vmR3EmulationThread: Reset rc=%Rrc, VM state %d -> %d\n", rc, enmBefore, pVM->enmVMState));
155	}
156	else
157	{
158	/*
159	* Nothing important is pending, so wait for something.
160	*/
161	rc = VMR3WaitU(pUVM);
162	if (RT_FAILURE(rc))
163	break;
164	}
165
166	/*
167	* Check for termination requests, these have extremely high priority.
168	*/
169	if ( rc == VINF_EM_TERMINATE
170	\|\| VM_FF_ISSET(pVM, VM_FF_TERMINATE)
171	\|\| pUVM->vm.s.fTerminateEMT)
172	break;
173	}
174
175	/*
176	* Some requests (both VMR3Req* and the DBGF) can potentially
177	* resume or start the VM, in that case we'll get a change in
178	* VM status indicating that we're now running.
179	*/
180	if ( RT_SUCCESS(rc)
181	&& pUVM->pVM
182	&& enmBefore != pUVM->pVM->enmVMState
183	&& pUVM->pVM->enmVMState == VMSTATE_RUNNING)
184	{
185	PVM pVM = pUVM->pVM;
186	rc = EMR3ExecuteVM(pVM, idCpu);
187	Log(("vmR3EmulationThread: EMR3ExecuteVM() -> rc=%Rrc, enmVMState=%d\n", rc, pVM->enmVMState));
188	if ( EMGetState(pVM) == EMSTATE_GURU_MEDITATION
189	&& pVM->enmVMState == VMSTATE_RUNNING)
190	vmR3SetState(pVM, VMSTATE_GURU_MEDITATION);
191	}
192
193	} /* forever */
194
195
196	/*
197	* Exiting.
198	*/
199	Log(("vmR3EmulationThread: Terminating emulation thread! Thread=%#x pUVM=%p rc=%Rrc enmBefore=%d enmVMState=%d\n",
200	ThreadSelf, pUVM, rc, enmBefore, pUVM->pVM ? pUVM->pVM->enmVMState : VMSTATE_TERMINATED));
201	if (pUVM->vm.s.fEMTDoesTheCleanup)
202	{
203	Log(("vmR3EmulationThread: executing delayed Destroy\n"));
204	Assert(pUVM->pVM);
205	vmR3Destroy(pUVM->pVM);
206	vmR3DestroyFinalBitFromEMT(pUVM);
207	}
208	else
209	{
210	vmR3DestroyFinalBitFromEMT(pUVM);
211
212	pUVMCPU->vm.s.NativeThreadEMT = NIL_RTNATIVETHREAD;
213	}
214	Log(("vmR3EmulationThread: EMT is terminated.\n"));
215	return rc;
216	}
217
218
219	/**
220	* Wait for VM to be resumed. Handle events like vmR3EmulationThread does.
221	* In case the VM is stopped, clean up and long jump to the main EMT loop.
222	*
223	* @returns VINF_SUCCESS or doesn't return
224	* @param pVM VM handle.
225	*/
226	VMMR3DECL(int) VMR3WaitForResume(PVM pVM)
227	{
228	/*
229	* The request loop.
230	*/
231	PUVMCPU pUVMCPU;
232	PUVM pUVM = pVM->pUVM;
233	VMSTATE enmBefore;
234	int rc;
235
236	pUVMCPU = (PUVMCPU)RTTlsGet(pUVM->vm.s.idxTLS);
237	AssertReturn(pUVMCPU, VERR_INTERNAL_ERROR);
238
239	for (;;)
240	{
241
242	/*
243	* Pending requests which needs servicing?
244	*
245	* We check for state changes in addition to status codes when
246	* servicing requests. (Look after the ifs.)
247	*/
248	enmBefore = pVM->enmVMState;
249	if ( VM_FF_ISSET(pVM, VM_FF_TERMINATE)
250	\|\| pUVM->vm.s.fTerminateEMT)
251	{
252	rc = VINF_EM_TERMINATE;
253	break;
254	}
255	else if (pUVM->vm.s.pReqs)
256	{
257	/*
258	* Service execute in EMT request.
259	*/
260	rc = VMR3ReqProcessU(pUVM, VMREQDEST_ANY);
261	Log(("vmR3EmulationThread: Req rc=%Rrc, VM state %d -> %d\n", rc, enmBefore, pVM->enmVMState));
262	}
263	else if (VM_FF_ISSET(pVM, VM_FF_DBGF))
264	{
265	/*
266	* Service the debugger request.
267	*/
268	rc = DBGFR3VMMForcedAction(pVM);
269	Log(("vmR3EmulationThread: Dbg rc=%Rrc, VM state %d -> %d\n", rc, enmBefore, pVM->enmVMState));
270	}
271	else if (VM_FF_ISSET(pVM, VM_FF_RESET))
272	{
273	/*
274	* Service a delay reset request.
275	*/
276	rc = VMR3Reset(pVM);
277	VM_FF_CLEAR(pVM, VM_FF_RESET);
278	Log(("vmR3EmulationThread: Reset rc=%Rrc, VM state %d -> %d\n", rc, enmBefore, pVM->enmVMState));
279	}
280	else
281	{
282	/*
283	* Nothing important is pending, so wait for something.
284	*/
285	rc = VMR3WaitU(pUVM);
286	if (RT_FAILURE(rc))
287	break;
288	}
289
290	/*
291	* Check for termination requests, these are extremely high priority.
292	*/
293	if ( rc == VINF_EM_TERMINATE
294	\|\| VM_FF_ISSET(pVM, VM_FF_TERMINATE)
295	\|\| pUVM->vm.s.fTerminateEMT)
296	break;
297
298	/*
299	* Some requests (both VMR3Req* and the DBGF) can potentially
300	* resume or start the VM, in that case we'll get a change in
301	* VM status indicating that we're now running.
302	*/
303	if ( RT_SUCCESS(rc)
304	&& enmBefore != pVM->enmVMState
305	&& pVM->enmVMState == VMSTATE_RUNNING)
306	{
307	/* Only valid exit reason. */
308	return VINF_SUCCESS;
309	}
310
311	} /* forever */
312
313	/* Return to the main loop in vmR3EmulationThread, which will clean up for us. */
314	longjmp(pUVMCPU->vm.s.emtJumpEnv, 1);
315	}
316
317
318	/**
319	* Gets the name of a halt method.
320	*
321	* @returns Pointer to a read only string.
322	* @param enmMethod The method.
323	*/
324	static const char *vmR3GetHaltMethodName(VMHALTMETHOD enmMethod)
325	{
326	switch (enmMethod)
327	{
328	case VMHALTMETHOD_BOOTSTRAP: return "bootstrap";
329	case VMHALTMETHOD_DEFAULT: return "default";
330	case VMHALTMETHOD_OLD: return "old";
331	case VMHALTMETHOD_1: return "method1";
332	//case VMHALTMETHOD_2: return "method2";
333	case VMHALTMETHOD_GLOBAL_1: return "global1";
334	default: return "unknown";
335	}
336	}
337
338
339	/**
340	* The old halt loop.
341	*
342	* @param pUVM Pointer to the user mode VM structure.
343	*/
344	static DECLCALLBACK(int) vmR3HaltOldDoHalt(PUVM pUVM, const uint32_t fMask, uint64_t /* u64Now*/)
345	{
346	/*
347	* Halt loop.
348	*/
349	PVM pVM = pUVM->pVM;
350	int rc = VINF_SUCCESS;
351	ASMAtomicWriteBool(&pUVM->vm.s.fWait, true);
352	//unsigned cLoops = 0;
353	for (;;)
354	{
355	/*
356	* Work the timers and check if we can exit.
357	* The poll call gives us the ticks left to the next event in
358	* addition to perhaps set an FF.
359	*/
360	STAM_REL_PROFILE_START(&pUVM->vm.s.StatHaltTimers, b);
361	TMR3TimerQueuesDo(pVM);
362	STAM_REL_PROFILE_STOP(&pUVM->vm.s.StatHaltTimers, b);
363	if (VM_FF_ISPENDING(pVM, fMask))
364	break;
365	uint64_t u64NanoTS = TMVirtualToNano(pVM, TMTimerPoll(pVM));
366	if (VM_FF_ISPENDING(pVM, fMask))
367	break;
368
369	/*
370	* Wait for a while. Someone will wake us up or interrupt the call if
371	* anything needs our attention.
372	*/
373	if (u64NanoTS < 50000)
374	{
375	//RTLogPrintf("u64NanoTS=%RI64 cLoops=%d spin\n", u64NanoTS, cLoops++);
376	/* spin */;
377	}
378	else
379	{
380	VMMR3YieldStop(pVM);
381	//uint64_t u64Start = RTTimeNanoTS();
382	if (u64NanoTS < 870000) /* this is a bit speculative... works fine on linux. */
383	{
384	//RTLogPrintf("u64NanoTS=%RI64 cLoops=%d yield", u64NanoTS, cLoops++);
385	STAM_REL_PROFILE_START(&pUVM->vm.s.StatHaltYield, a);
386	RTThreadYield(); /* this is the best we can do here */
387	STAM_REL_PROFILE_STOP(&pUVM->vm.s.StatHaltYield, a);
388	}
389	else if (u64NanoTS < 2000000)
390	{
391	//RTLogPrintf("u64NanoTS=%RI64 cLoops=%d sleep 1ms", u64NanoTS, cLoops++);
392	STAM_REL_PROFILE_START(&pUVM->vm.s.StatHaltBlock, a);
393	rc = RTSemEventWait(pUVM->vm.s.EventSemWait, 1);
394	STAM_REL_PROFILE_STOP(&pUVM->vm.s.StatHaltBlock, a);
395	}
396	else
397	{
398	//RTLogPrintf("u64NanoTS=%RI64 cLoops=%d sleep %dms", u64NanoTS, cLoops++, (uint32_t)RT_MIN((u64NanoTS - 500000) / 1000000, 15));
399	STAM_REL_PROFILE_START(&pUVM->vm.s.StatHaltBlock, a);
400	rc = RTSemEventWait(pUVM->vm.s.EventSemWait, RT_MIN((u64NanoTS - 1000000) / 1000000, 15));
401	STAM_REL_PROFILE_STOP(&pUVM->vm.s.StatHaltBlock, a);
402	}
403	//uint64_t u64Slept = RTTimeNanoTS() - u64Start;
404	//RTLogPrintf(" -> rc=%Rrc in %RU64 ns / %RI64 ns delta\n", rc, u64Slept, u64NanoTS - u64Slept);
405	}
406	if (rc == VERR_TIMEOUT)
407	rc = VINF_SUCCESS;
408	else if (RT_FAILURE(rc))
409	{
410	AssertRC(rc != VERR_INTERRUPTED);
411	AssertMsgFailed(("RTSemEventWait->%Rrc\n", rc));
412	ASMAtomicUoWriteBool(&pUVM->vm.s.fTerminateEMT, true);
413	VM_FF_SET(pVM, VM_FF_TERMINATE);
414	rc = VERR_INTERNAL_ERROR;
415	break;
416	}
417	}
418
419	ASMAtomicUoWriteBool(&pUVM->vm.s.fWait, false);
420	return rc;
421	}
422
423
424	/**
425	* Initialize the configuration of halt method 1 & 2.
426	*
427	* @return VBox status code. Failure on invalid CFGM data.
428	* @param pVM The VM handle.
429	*/
430	static int vmR3HaltMethod12ReadConfigU(PUVM pUVM)
431	{
432	/*
433	* The defaults.
434	*/
435	#if 1 /* DEBUGGING STUFF - REMOVE LATER */
436	pUVM->vm.s.Halt.Method12.u32LagBlockIntervalDivisorCfg = 4;
437	pUVM->vm.s.Halt.Method12.u32MinBlockIntervalCfg = 2*1000000;
438	pUVM->vm.s.Halt.Method12.u32MaxBlockIntervalCfg = 75*1000000;
439	pUVM->vm.s.Halt.Method12.u32StartSpinningCfg = 30*1000000;
440	pUVM->vm.s.Halt.Method12.u32StopSpinningCfg = 20*1000000;
441	#else
442	pUVM->vm.s.Halt.Method12.u32LagBlockIntervalDivisorCfg = 4;
443	pUVM->vm.s.Halt.Method12.u32MinBlockIntervalCfg = 5*1000000;
444	pUVM->vm.s.Halt.Method12.u32MaxBlockIntervalCfg = 200*1000000;
445	pUVM->vm.s.Halt.Method12.u32StartSpinningCfg = 20*1000000;
446	pUVM->vm.s.Halt.Method12.u32StopSpinningCfg = 2*1000000;
447	#endif
448
449	/*
450	* Query overrides.
451	*
452	* I don't have time to bother with niceities such as invalid value checks
453	* here right now. sorry.
454	*/
455	PCFGMNODE pCfg = CFGMR3GetChild(CFGMR3GetRoot(pUVM->pVM), "/VMM/HaltedMethod1");
456	if (pCfg)
457	{
458	uint32_t u32;
459	if (RT_SUCCESS(CFGMR3QueryU32(pCfg, "LagBlockIntervalDivisor", &u32)))
460	pUVM->vm.s.Halt.Method12.u32LagBlockIntervalDivisorCfg = u32;
461	if (RT_SUCCESS(CFGMR3QueryU32(pCfg, "MinBlockInterval", &u32)))
462	pUVM->vm.s.Halt.Method12.u32MinBlockIntervalCfg = u32;
463	if (RT_SUCCESS(CFGMR3QueryU32(pCfg, "MaxBlockInterval", &u32)))
464	pUVM->vm.s.Halt.Method12.u32MaxBlockIntervalCfg = u32;
465	if (RT_SUCCESS(CFGMR3QueryU32(pCfg, "StartSpinning", &u32)))
466	pUVM->vm.s.Halt.Method12.u32StartSpinningCfg = u32;
467	if (RT_SUCCESS(CFGMR3QueryU32(pCfg, "StopSpinning", &u32)))
468	pUVM->vm.s.Halt.Method12.u32StopSpinningCfg = u32;
469	LogRel(("HaltedMethod1 config: %d/%d/%d/%d/%d\n",
470	pUVM->vm.s.Halt.Method12.u32LagBlockIntervalDivisorCfg,
471	pUVM->vm.s.Halt.Method12.u32MinBlockIntervalCfg,
472	pUVM->vm.s.Halt.Method12.u32MaxBlockIntervalCfg,
473	pUVM->vm.s.Halt.Method12.u32StartSpinningCfg,
474	pUVM->vm.s.Halt.Method12.u32StopSpinningCfg));
475	}
476
477	return VINF_SUCCESS;
478	}
479
480
481	/**
482	* Initialize halt method 1.
483	*
484	* @return VBox status code.
485	* @param pUVM Pointer to the user mode VM structure.
486	*/
487	static DECLCALLBACK(int) vmR3HaltMethod1Init(PUVM pUVM)
488	{
489	return vmR3HaltMethod12ReadConfigU(pUVM);
490	}
491
492
493	/**
494	* Method 1 - Block whenever possible, and when lagging behind
495	* switch to spinning for 10-30ms with occational blocking until
496	* the lag has been eliminated.
497	*/
498	static DECLCALLBACK(int) vmR3HaltMethod1Halt(PUVM pUVM, const uint32_t fMask, uint64_t u64Now)
499	{
500	PVM pVM = pUVM->pVM;
501
502	/*
503	* To simplify things, we decide up-front whether we should switch to spinning or
504	* not. This makes some ASSUMPTIONS about the cause of the spinning (PIT/RTC/PCNet)
505	* and that it will generate interrupts or other events that will cause us to exit
506	* the halt loop.
507	*/
508	bool fBlockOnce = false;
509	bool fSpinning = false;
510	uint32_t u32CatchUpPct = TMVirtualSyncGetCatchUpPct(pVM);
511	if (u32CatchUpPct /* non-zero if catching up */)
512	{
513	if (pUVM->vm.s.Halt.Method12.u64StartSpinTS)
514	{
515	fSpinning = TMVirtualSyncGetLag(pVM) >= pUVM->vm.s.Halt.Method12.u32StopSpinningCfg;
516	if (fSpinning)
517	{
518	uint64_t u64Lag = TMVirtualSyncGetLag(pVM);
519	fBlockOnce = u64Now - pUVM->vm.s.Halt.Method12.u64LastBlockTS
520	> RT_MAX(pUVM->vm.s.Halt.Method12.u32MinBlockIntervalCfg,
521	RT_MIN(u64Lag / pUVM->vm.s.Halt.Method12.u32LagBlockIntervalDivisorCfg,
522	pUVM->vm.s.Halt.Method12.u32MaxBlockIntervalCfg));
523	}
524	else
525	{
526	//RTLogRelPrintf("Stopped spinning (%u ms)\n", (u64Now - pUVM->vm.s.Halt.Method12.u64StartSpinTS) / 1000000);
527	pUVM->vm.s.Halt.Method12.u64StartSpinTS = 0;
528	}
529	}
530	else
531	{
532	fSpinning = TMVirtualSyncGetLag(pVM) >= pUVM->vm.s.Halt.Method12.u32StartSpinningCfg;
533	if (fSpinning)
534	pUVM->vm.s.Halt.Method12.u64StartSpinTS = u64Now;
535	}
536	}
537	else if (pUVM->vm.s.Halt.Method12.u64StartSpinTS)
538	{
539	//RTLogRelPrintf("Stopped spinning (%u ms)\n", (u64Now - pUVM->vm.s.Halt.Method12.u64StartSpinTS) / 1000000);
540	pUVM->vm.s.Halt.Method12.u64StartSpinTS = 0;
541	}
542
543	/*
544	* Halt loop.
545	*/
546	int rc = VINF_SUCCESS;
547	ASMAtomicWriteBool(&pUVM->vm.s.fWait, true);
548	unsigned cLoops = 0;
549	for (;; cLoops++)
550	{
551	/*
552	* Work the timers and check if we can exit.
553	*/
554	STAM_REL_PROFILE_START(&pUVM->vm.s.StatHaltTimers, b);
555	TMR3TimerQueuesDo(pVM);
556	STAM_REL_PROFILE_STOP(&pUVM->vm.s.StatHaltTimers, b);
557	if (VM_FF_ISPENDING(pVM, fMask))
558	break;
559
560	/*
561	* Estimate time left to the next event.
562	*/
563	uint64_t u64NanoTS = TMVirtualToNano(pVM, TMTimerPoll(pVM));
564	if (VM_FF_ISPENDING(pVM, fMask))
565	break;
566
567	/*
568	* Block if we're not spinning and the interval isn't all that small.
569	*/
570	if ( ( !fSpinning
571	\|\| fBlockOnce)
572	#if 1 /* DEBUGGING STUFF - REMOVE LATER */
573	&& u64NanoTS >= 100000) /* 0.100 ms */
574	#else
575	&& u64NanoTS >= 250000) /* 0.250 ms */
576	#endif
577	{
578	const uint64_t Start = pUVM->vm.s.Halt.Method12.u64LastBlockTS = RTTimeNanoTS();
579	VMMR3YieldStop(pVM);
580
581	uint32_t cMilliSecs = RT_MIN(u64NanoTS / 1000000, 15);
582	if (cMilliSecs <= pUVM->vm.s.Halt.Method12.cNSBlockedTooLongAvg)
583	cMilliSecs = 1;
584	else
585	cMilliSecs -= pUVM->vm.s.Halt.Method12.cNSBlockedTooLongAvg;
586	//RTLogRelPrintf("u64NanoTS=%RI64 cLoops=%3d sleep %02dms (%7RU64) ", u64NanoTS, cLoops, cMilliSecs, u64NanoTS);
587	STAM_REL_PROFILE_START(&pUVM->vm.s.StatHaltBlock, a);
588	rc = RTSemEventWait(pUVM->vm.s.EventSemWait, cMilliSecs);
589	STAM_REL_PROFILE_STOP(&pUVM->vm.s.StatHaltBlock, a);
590	if (rc == VERR_TIMEOUT)
591	rc = VINF_SUCCESS;
592	else if (RT_FAILURE(rc))
593	{
594	AssertRC(rc != VERR_INTERRUPTED);
595	AssertMsgFailed(("RTSemEventWait->%Rrc\n", rc));
596	ASMAtomicUoWriteBool(&pUVM->vm.s.fTerminateEMT, true);
597	VM_FF_SET(pVM, VM_FF_TERMINATE);
598	rc = VERR_INTERNAL_ERROR;
599	break;
600	}
601
602	/*
603	* Calc the statistics.
604	* Update averages every 16th time, and flush parts of the history every 64th time.
605	*/
606	const uint64_t Elapsed = RTTimeNanoTS() - Start;
607	pUVM->vm.s.Halt.Method12.cNSBlocked += Elapsed;
608	if (Elapsed > u64NanoTS)
609	pUVM->vm.s.Halt.Method12.cNSBlockedTooLong += Elapsed - u64NanoTS;
610	pUVM->vm.s.Halt.Method12.cBlocks++;
611	if (!(pUVM->vm.s.Halt.Method12.cBlocks & 0xf))
612	{
613	pUVM->vm.s.Halt.Method12.cNSBlockedTooLongAvg = pUVM->vm.s.Halt.Method12.cNSBlockedTooLong / pUVM->vm.s.Halt.Method12.cBlocks;
614	if (!(pUVM->vm.s.Halt.Method12.cBlocks & 0x3f))
615	{
616	pUVM->vm.s.Halt.Method12.cNSBlockedTooLong = pUVM->vm.s.Halt.Method12.cNSBlockedTooLongAvg * 0x40;
617	pUVM->vm.s.Halt.Method12.cBlocks = 0x40;
618	}
619	}
620	//RTLogRelPrintf(" -> %7RU64 ns / %7RI64 ns delta%s\n", Elapsed, Elapsed - u64NanoTS, fBlockOnce ? " (block once)" : "");
621
622	/*
623	* Clear the block once flag if we actually blocked.
624	*/
625	if ( fBlockOnce
626	&& Elapsed > 100000 /* 0.1 ms */)
627	fBlockOnce = false;
628	}
629	}
630	//if (fSpinning) RTLogRelPrintf("spun for %RU64 ns %u loops; lag=%RU64 pct=%d\n", RTTimeNanoTS() - u64Now, cLoops, TMVirtualSyncGetLag(pVM), u32CatchUpPct);
631
632	ASMAtomicUoWriteBool(&pUVM->vm.s.fWait, false);
633	return rc;
634	}
635
636
637	/**
638	* Initialize the global 1 halt method.
639	*
640	* @return VBox status code.
641	* @param pUVM Pointer to the user mode VM structure.
642	*/
643	static DECLCALLBACK(int) vmR3HaltGlobal1Init(PUVM pUVM)
644	{
645	return VINF_SUCCESS;
646	}
647
648
649	/**
650	* The global 1 halt method - Block in GMM (ring-0) and let it
651	* try take care of the global scheduling of EMT threads.
652	*/
653	static DECLCALLBACK(int) vmR3HaltGlobal1Halt(PUVM pUVM, const uint32_t fMask, uint64_t u64Now)
654	{
655	PVM pVM = pUVM->pVM;
656
657	/*
658	* Halt loop.
659	*/
660	int rc = VINF_SUCCESS;
661	ASMAtomicWriteBool(&pUVM->vm.s.fWait, true);
662	unsigned cLoops = 0;
663	for (;; cLoops++)
664	{
665	/*
666	* Work the timers and check if we can exit.
667	*/
668	STAM_REL_PROFILE_START(&pUVM->vm.s.StatHaltTimers, b);
669	TMR3TimerQueuesDo(pVM);
670	STAM_REL_PROFILE_STOP(&pUVM->vm.s.StatHaltTimers, b);
671	if (VM_FF_ISPENDING(pVM, fMask))
672	break;
673
674	/*
675	* Estimate time left to the next event.
676	*/
677	uint64_t u64Delta;
678	uint64_t u64GipTime = TMTimerPollGIP(pVM, &u64Delta);
679	if (VM_FF_ISPENDING(pVM, fMask))
680	break;
681
682	/*
683	* Block if we're not spinning and the interval isn't all that small.
684	*/
685	if (u64Delta > 50000 /* 0.050ms */)
686	{
687	VMMR3YieldStop(pVM);
688	if (VM_FF_ISPENDING(pVM, fMask))
689	break;
690
691	//RTLogRelPrintf("u64NanoTS=%RI64 cLoops=%3d sleep %02dms (%7RU64) ", u64NanoTS, cLoops, cMilliSecs, u64NanoTS);
692	STAM_REL_PROFILE_START(&pUVM->vm.s.StatHaltBlock, c);
693	rc = SUPCallVMMR0Ex(pVM->pVMR0, VMMR0_DO_GVMM_SCHED_HALT, u64GipTime, NULL);
694	STAM_REL_PROFILE_STOP(&pUVM->vm.s.StatHaltBlock, c);
695	if (rc == VERR_INTERRUPTED)
696	rc = VINF_SUCCESS;
697	else if (RT_FAILURE(rc))
698	{
699	AssertMsgFailed(("VMMR0_DO_GVMM_SCHED_HALT->%Rrc\n", rc));
700	ASMAtomicUoWriteBool(&pUVM->vm.s.fTerminateEMT, true);
701	VM_FF_SET(pVM, VM_FF_TERMINATE);
702	rc = VERR_INTERNAL_ERROR;
703	break;
704	}
705	}
706	/*
707	* When spinning call upon the GVMM and do some wakups once
708	* in a while, it's not like we're actually busy or anything.
709	*/
710	else if (!(cLoops & 0x1fff))
711	{
712	STAM_REL_PROFILE_START(&pUVM->vm.s.StatHaltYield, d);
713	rc = SUPCallVMMR0Ex(pVM->pVMR0, VMMR0_DO_GVMM_SCHED_POLL, false /* don't yield */, NULL);
714	STAM_REL_PROFILE_STOP(&pUVM->vm.s.StatHaltYield, d);
715	}
716	}
717	//if (fSpinning) RTLogRelPrintf("spun for %RU64 ns %u loops; lag=%RU64 pct=%d\n", RTTimeNanoTS() - u64Now, cLoops, TMVirtualSyncGetLag(pVM), u32CatchUpPct);
718
719	ASMAtomicUoWriteBool(&pUVM->vm.s.fWait, false);
720	return rc;
721	}
722
723
724	/**
725	* The global 1 halt method - VMR3Wait() worker.
726	*
727	* @returns VBox status code.
728	* @param pUVM Pointer to the user mode VM structure.
729	*/
730	static DECLCALLBACK(int) vmR3HaltGlobal1Wait(PUVM pUVM)
731	{
732	ASMAtomicWriteBool(&pUVM->vm.s.fWait, true);
733
734	PVM pVM = pUVM->pVM;
735	int rc = VINF_SUCCESS;
736	for (;;)
737	{
738	/*
739	* Check Relevant FFs.
740	*/
741	if (VM_FF_ISPENDING(pVM, VM_FF_EXTERNAL_SUSPENDED_MASK))
742	break;
743
744	/*
745	* Wait for a while. Someone will wake us up or interrupt the call if
746	* anything needs our attention.
747	*/
748	rc = SUPCallVMMR0Ex(pVM->pVMR0, VMMR0_DO_GVMM_SCHED_HALT, RTTimeNanoTS() + 1000000000 /* +1s */, NULL);
749	if (rc == VERR_INTERRUPTED)
750	rc = VINF_SUCCESS;
751	else if (RT_FAILURE(rc))
752	{
753	AssertMsgFailed(("RTSemEventWait->%Rrc\n", rc));
754	ASMAtomicUoWriteBool(&pUVM->vm.s.fTerminateEMT, true);
755	VM_FF_SET(pVM, VM_FF_TERMINATE);
756	rc = VERR_INTERNAL_ERROR;
757	break;
758	}
759
760	}
761
762	ASMAtomicUoWriteBool(&pUVM->vm.s.fWait, false);
763	return rc;
764	}
765
766
767	/**
768	* The global 1 halt method - VMR3NotifyFF() worker.
769	*
770	* @param pUVM Pointer to the user mode VM structure.
771	* @param fNotifiedREM See VMR3NotifyFF().
772	*/
773	static DECLCALLBACK(void) vmR3HaltGlobal1NotifyFF(PUVM pUVM, bool fNotifiedREM)
774	{
775	if (pUVM->vm.s.fWait)
776	{
777	int rc = SUPCallVMMR0Ex(pUVM->pVM->pVMR0, VMMR0_DO_GVMM_SCHED_WAKE_UP, 0, NULL);
778	AssertRC(rc);
779	}
780	else if (!fNotifiedREM)
781	REMR3NotifyFF(pUVM->pVM);
782	}
783
784
785	/**
786	* Bootstrap VMR3Wait() worker.
787	*
788	* @returns VBox status code.
789	* @param pUVM Pointer to the user mode VM structure.
790	*/
791	static DECLCALLBACK(int) vmR3BootstrapWait(PUVM pUVM)
792	{
793	ASMAtomicWriteBool(&pUVM->vm.s.fWait, true);
794
795	int rc = VINF_SUCCESS;
796	for (;;)
797	{
798	/*
799	* Check Relevant FFs.
800	*/
801	if (pUVM->vm.s.pReqs)
802	break;
803	if ( pUVM->pVM
804	&& VM_FF_ISPENDING(pUVM->pVM, VM_FF_EXTERNAL_SUSPENDED_MASK))
805	break;
806	if (pUVM->vm.s.fTerminateEMT)
807	break;
808
809	/*
810	* Wait for a while. Someone will wake us up or interrupt the call if
811	* anything needs our attention.
812	*/
813	rc = RTSemEventWait(pUVM->vm.s.EventSemWait, 1000);
814	if (rc == VERR_TIMEOUT)
815	rc = VINF_SUCCESS;
816	else if (RT_FAILURE(rc))
817	{
818	AssertMsgFailed(("RTSemEventWait->%Rrc\n", rc));
819	ASMAtomicUoWriteBool(&pUVM->vm.s.fTerminateEMT, true);
820	if (pUVM->pVM)
821	VM_FF_SET(pUVM->pVM, VM_FF_TERMINATE);
822	rc = VERR_INTERNAL_ERROR;
823	break;
824	}
825
826	}
827
828	ASMAtomicUoWriteBool(&pUVM->vm.s.fWait, false);
829	return rc;
830	}
831
832
833	/**
834	* Bootstrap VMR3NotifyFF() worker.
835	*
836	* @param pUVM Pointer to the user mode VM structure.
837	* @param fNotifiedREM See VMR3NotifyFF().
838	*/
839	static DECLCALLBACK(void) vmR3BootstrapNotifyFF(PUVM pUVM, bool fNotifiedREM)
840	{
841	if (pUVM->vm.s.fWait)
842	{
843	int rc = RTSemEventSignal(pUVM->vm.s.EventSemWait);
844	AssertRC(rc);
845	}
846	}
847
848
849	/**
850	* Default VMR3Wait() worker.
851	*
852	* @returns VBox status code.
853	* @param pUVM Pointer to the user mode VM structure.
854	*/
855	static DECLCALLBACK(int) vmR3DefaultWait(PUVM pUVM)
856	{
857	ASMAtomicWriteBool(&pUVM->vm.s.fWait, true);
858
859	PVM pVM = pUVM->pVM;
860	int rc = VINF_SUCCESS;
861	for (;;)
862	{
863	/*
864	* Check Relevant FFs.
865	*/
866	if (VM_FF_ISPENDING(pVM, VM_FF_EXTERNAL_SUSPENDED_MASK))
867	break;
868
869	/*
870	* Wait for a while. Someone will wake us up or interrupt the call if
871	* anything needs our attention.
872	*/
873	rc = RTSemEventWait(pUVM->vm.s.EventSemWait, 1000);
874	if (rc == VERR_TIMEOUT)
875	rc = VINF_SUCCESS;
876	else if (RT_FAILURE(rc))
877	{
878	AssertMsgFailed(("RTSemEventWait->%Rrc\n", rc));
879	ASMAtomicUoWriteBool(&pUVM->vm.s.fTerminateEMT, true);
880	VM_FF_SET(pVM, VM_FF_TERMINATE);
881	rc = VERR_INTERNAL_ERROR;
882	break;
883	}
884
885	}
886
887	ASMAtomicUoWriteBool(&pUVM->vm.s.fWait, false);
888	return rc;
889	}
890
891
892	/**
893	* Default VMR3NotifyFF() worker.
894	*
895	* @param pUVM Pointer to the user mode VM structure.
896	* @param fNotifiedREM See VMR3NotifyFF().
897	*/
898	static DECLCALLBACK(void) vmR3DefaultNotifyFF(PUVM pUVM, bool fNotifiedREM)
899	{
900	if (pUVM->vm.s.fWait)
901	{
902	int rc = RTSemEventSignal(pUVM->vm.s.EventSemWait);
903	AssertRC(rc);
904	}
905	else if (!fNotifiedREM)
906	REMR3NotifyFF(pUVM->pVM);
907	}
908
909
910	/**
911	* Array with halt method descriptors.
912	* VMINT::iHaltMethod contains an index into this array.
913	*/
914	static const struct VMHALTMETHODDESC
915	{
916	/** The halt method id. */
917	VMHALTMETHOD enmHaltMethod;
918	/** The init function for loading config and initialize variables. */
919	DECLR3CALLBACKMEMBER(int, pfnInit,(PUVM pUVM));
920	/** The term function. */
921	DECLR3CALLBACKMEMBER(void, pfnTerm,(PUVM pUVM));
922	/** The halt function. */
923	DECLR3CALLBACKMEMBER(int, pfnHalt,(PUVM pUVM, const uint32_t fMask, uint64_t u64Now));
924	/** The wait function. */
925	DECLR3CALLBACKMEMBER(int, pfnWait,(PUVM pUVM));
926	/** The notifyFF function. */
927	DECLR3CALLBACKMEMBER(void, pfnNotifyFF,(PUVM pUVM, bool fNotifiedREM));
928	} g_aHaltMethods[] =
929	{
930	{ VMHALTMETHOD_BOOTSTRAP, NULL, NULL, NULL, vmR3BootstrapWait, vmR3BootstrapNotifyFF },
931	{ VMHALTMETHOD_OLD, NULL, NULL, vmR3HaltOldDoHalt, vmR3DefaultWait, vmR3DefaultNotifyFF },
932	{ VMHALTMETHOD_1, vmR3HaltMethod1Init, NULL, vmR3HaltMethod1Halt, vmR3DefaultWait, vmR3DefaultNotifyFF },
933	//{ VMHALTMETHOD_2, vmR3HaltMethod2Init, vmR3HaltMethod2Term, vmR3HaltMethod2DoHalt, vmR3HaltMethod2Wait, vmR3HaltMethod2NotifyFF },
934	{ VMHALTMETHOD_GLOBAL_1,vmR3HaltGlobal1Init, NULL, vmR3HaltGlobal1Halt, vmR3HaltGlobal1Wait, vmR3HaltGlobal1NotifyFF },
935	};
936
937
938	/**
939	* Notify the emulation thread (EMT) about pending Forced Action (FF).
940	*
941	* This function is called by thread other than EMT to make
942	* sure EMT wakes up and promptly service an FF request.
943	*
944	* @param pVM VM handle.
945	* @param fNotifiedREM Set if REM have already been notified. If clear the
946	* generic REMR3NotifyFF() method is called.
947	*/
948	VMMR3DECL(void) VMR3NotifyFF(PVM pVM, bool fNotifiedREM)
949	{
950	LogFlow(("VMR3NotifyFF:\n"));
951	PUVM pUVM = pVM->pUVM;
952	g_aHaltMethods[pUVM->vm.s.iHaltMethod].pfnNotifyFF(pUVM, fNotifiedREM);
953	}
954
955
956	/**
957	* Notify the emulation thread (EMT) about pending Forced Action (FF).
958	*
959	* This function is called by thread other than EMT to make
960	* sure EMT wakes up and promptly service an FF request.
961	*
962	* @param pUVM Pointer to the user mode VM structure.
963	* @param fNotifiedREM Set if REM have already been notified. If clear the
964	* generic REMR3NotifyFF() method is called.
965	*/
966	VMMR3DECL(void) VMR3NotifyFFU(PUVM pUVM, bool fNotifiedREM)
967	{
968	LogFlow(("VMR3NotifyFF:\n"));
969	g_aHaltMethods[pUVM->vm.s.iHaltMethod].pfnNotifyFF(pUVM, fNotifiedREM);
970	}
971
972
973	/**
974	* Halted VM Wait.
975	* Any external event will unblock the thread.
976	*
977	* @returns VINF_SUCCESS unless a fatal error occured. In the latter
978	* case an appropriate status code is returned.
979	* @param pVM VM handle.
980	* @param fIgnoreInterrupts If set the VM_FF_INTERRUPT flags is ignored.
981	* @thread The emulation thread.
982	*/
983	VMMR3DECL(int) VMR3WaitHalted(PVM pVM, bool fIgnoreInterrupts)
984	{
985	LogFlow(("VMR3WaitHalted: fIgnoreInterrupts=%d\n", fIgnoreInterrupts));
986
987	/*
988	* Check Relevant FFs.
989	*/
990	const uint32_t fMask = !fIgnoreInterrupts
991	? VM_FF_EXTERNAL_HALTED_MASK
992	: VM_FF_EXTERNAL_HALTED_MASK & ~(VM_FF_INTERRUPT_APIC \| VM_FF_INTERRUPT_PIC);
993	if (VM_FF_ISPENDING(pVM, fMask))
994	{
995	LogFlow(("VMR3WaitHalted: returns VINF_SUCCESS (FF %#x)\n", pVM->fForcedActions));
996	return VINF_SUCCESS;
997	}
998
999	/*
1000	* The yielder is suspended while we're halting, while TM might have clock(s) running
1001	* only at certain times and need to be notified..
1002	*/
1003	VMMR3YieldSuspend(pVM);
1004	TMNotifyStartOfHalt(pVM);
1005
1006	/*
1007	* Record halt averages for the last second.
1008	*/
1009	PUVM pUVM = pVM->pUVM;
1010	uint64_t u64Now = RTTimeNanoTS();
1011	int64_t off = u64Now - pUVM->vm.s.u64HaltsStartTS;
1012	if (off > 1000000000)
1013	{
1014	if (off > _4G \|\| !pUVM->vm.s.cHalts)
1015	{
1016	pUVM->vm.s.HaltInterval = 1000000000 /* 1 sec */;
1017	pUVM->vm.s.HaltFrequency = 1;
1018	}
1019	else
1020	{
1021	pUVM->vm.s.HaltInterval = (uint32_t)off / pUVM->vm.s.cHalts;
1022	pUVM->vm.s.HaltFrequency = ASMMultU64ByU32DivByU32(pUVM->vm.s.cHalts, 1000000000, (uint32_t)off);
1023	}
1024	pUVM->vm.s.u64HaltsStartTS = u64Now;
1025	pUVM->vm.s.cHalts = 0;
1026	}
1027	pUVM->vm.s.cHalts++;
1028
1029	/*
1030	* Do the halt.
1031	*/
1032	int rc = g_aHaltMethods[pUVM->vm.s.iHaltMethod].pfnHalt(pUVM, fMask, u64Now);
1033
1034	/*
1035	* Notify TM and resume the yielder
1036	*/
1037	TMNotifyEndOfHalt(pVM);
1038	VMMR3YieldResume(pVM);
1039
1040	LogFlow(("VMR3WaitHalted: returns %Rrc (FF %#x)\n", rc, pVM->fForcedActions));
1041	return rc;
1042	}
1043
1044
1045	/**
1046	* Suspended VM Wait.
1047	* Only a handful of forced actions will cause the function to
1048	* return to the caller.
1049	*
1050	* @returns VINF_SUCCESS unless a fatal error occured. In the latter
1051	* case an appropriate status code is returned.
1052	* @param pUVM Pointer to the user mode VM structure.
1053	* @thread The emulation thread.
1054	*/
1055	VMMR3DECL(int) VMR3WaitU(PUVM pUVM)
1056	{
1057	LogFlow(("VMR3WaitU:\n"));
1058
1059	/*
1060	* Check Relevant FFs.
1061	*/
1062	PVM pVM = pUVM->pVM;
1063	if ( pVM
1064	&& VM_FF_ISPENDING(pVM, VM_FF_EXTERNAL_SUSPENDED_MASK))
1065	{
1066	LogFlow(("VMR3Wait: returns VINF_SUCCESS (FF %#x)\n", pVM->fForcedActions));
1067	return VINF_SUCCESS;
1068	}
1069
1070	/*
1071	* Do waiting according to the halt method (so VMR3NotifyFF
1072	* doesn't have to special case anything).
1073	*/
1074	int rc = g_aHaltMethods[pUVM->vm.s.iHaltMethod].pfnWait(pUVM);
1075	LogFlow(("VMR3WaitU: returns %Rrc (FF %#x)\n", rc, pVM ? pVM->fForcedActions : 0));
1076	return rc;
1077	}
1078
1079
1080	/**
1081	* Changes the halt method.
1082	*
1083	* @returns VBox status code.
1084	* @param pUVM Pointer to the user mode VM structure.
1085	* @param enmHaltMethod The new halt method.
1086	* @thread EMT.
1087	*/
1088	int vmR3SetHaltMethodU(PUVM pUVM, VMHALTMETHOD enmHaltMethod)
1089	{
1090	PVM pVM = pUVM->pVM; Assert(pVM);
1091	VM_ASSERT_EMT(pVM);
1092	AssertReturn(enmHaltMethod > VMHALTMETHOD_INVALID && enmHaltMethod < VMHALTMETHOD_END, VERR_INVALID_PARAMETER);
1093
1094	/*
1095	* Resolve default (can be overridden in the configuration).
1096	*/
1097	if (enmHaltMethod == VMHALTMETHOD_DEFAULT)
1098	{
1099	uint32_t u32;
1100	int rc = CFGMR3QueryU32(CFGMR3GetChild(CFGMR3GetRoot(pVM), "VM"), "HaltMethod", &u32);
1101	if (RT_SUCCESS(rc))
1102	{
1103	enmHaltMethod = (VMHALTMETHOD)u32;
1104	if (enmHaltMethod <= VMHALTMETHOD_INVALID \|\| enmHaltMethod >= VMHALTMETHOD_END)
1105	return VMSetError(pVM, VERR_INVALID_PARAMETER, RT_SRC_POS, N_("Invalid VM/HaltMethod value %d"), enmHaltMethod);
1106	}
1107	else if (rc == VERR_CFGM_VALUE_NOT_FOUND \|\| rc == VERR_CFGM_CHILD_NOT_FOUND)
1108	return VMSetError(pVM, rc, RT_SRC_POS, N_("Failed to Query VM/HaltMethod as uint32_t"));
1109	else
1110	enmHaltMethod = VMHALTMETHOD_GLOBAL_1;
1111	//enmHaltMethod = VMHALTMETHOD_1;
1112	//enmHaltMethod = VMHALTMETHOD_OLD;
1113	}
1114	LogRel(("VM: Halt method %s (%d)\n", vmR3GetHaltMethodName(enmHaltMethod), enmHaltMethod));
1115
1116	/*
1117	* Find the descriptor.
1118	*/
1119	unsigned i = 0;
1120	while ( i < RT_ELEMENTS(g_aHaltMethods)
1121	&& g_aHaltMethods[i].enmHaltMethod != enmHaltMethod)
1122	i++;
1123	AssertReturn(i < RT_ELEMENTS(g_aHaltMethods), VERR_INVALID_PARAMETER);
1124
1125	/*
1126	* Terminate the old one.
1127	*/
1128	if ( pUVM->vm.s.enmHaltMethod != VMHALTMETHOD_INVALID
1129	&& g_aHaltMethods[pUVM->vm.s.iHaltMethod].pfnTerm)
1130	{
1131	g_aHaltMethods[pUVM->vm.s.iHaltMethod].pfnTerm(pUVM);
1132	pUVM->vm.s.enmHaltMethod = VMHALTMETHOD_INVALID;
1133	}
1134
1135	/*
1136	* Init the new one.
1137	*/
1138	memset(&pUVM->vm.s.Halt, 0, sizeof(pUVM->vm.s.Halt));
1139	if (g_aHaltMethods[i].pfnInit)
1140	{
1141	int rc = g_aHaltMethods[i].pfnInit(pUVM);
1142	AssertRCReturn(rc, rc);
1143	}
1144	pUVM->vm.s.enmHaltMethod = enmHaltMethod;
1145
1146	ASMAtomicWriteU32(&pUVM->vm.s.iHaltMethod, i);
1147	return VINF_SUCCESS;
1148	}
1149

Note: See TracBrowser for help on using the repository browser.

source: vbox/trunk/src/VBox/VMM/VMEmt.cpp@ 18619

Download in other formats: