VMEmt.cpp@ 19420

Last change on this file since 19420 was 19407, checked in by vboxsync, 16 years ago
VMEmt.cpp: Implemented VMNOTIFYFF_FLAGS_POKE. (not working though as we're not yet working the VMCPU::enmState I think, fixing that and the other missing bits tomorrow.)
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File size: 42.3 KB

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1	/* $Id: VMEmt.cpp 19407 2009-05-05 23:38:19Z 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	* Internal Functions *
49	*******************************************************************************/
50	int vmR3EmulationThreadWithId(RTTHREAD ThreadSelf, PUVMCPU pUVCpu, VMCPUID idCpu);
51
52
53	/**
54	* The emulation thread main function.
55	*
56	* @returns Thread exit code.
57	* @param ThreadSelf The handle to the executing thread.
58	* @param pvArgs Pointer to the user mode per-VCpu structure (UVMPCU).
59	*/
60	DECLCALLBACK(int) vmR3EmulationThread(RTTHREAD ThreadSelf, void *pvArgs)
61	{
62	PUVMCPU pUVCpu = (PUVMCPU)pvArgs;
63	return vmR3EmulationThreadWithId(ThreadSelf, pUVCpu, pUVCpu->idCpu);
64	}
65
66
67	/**
68	* The emulation thread main function, with Virtual CPU ID for debugging.
69	*
70	* @returns Thread exit code.
71	* @param ThreadSelf The handle to the executing thread.
72	* @param pUVCpu Pointer to the user mode per-VCpu structure.
73	* @param idCpu The virtual CPU ID, for backtrace purposes.
74	*/
75	int vmR3EmulationThreadWithId(RTTHREAD ThreadSelf, PUVMCPU pUVCpu, VMCPUID idCpu)
76	{
77	PUVM pUVM = pUVCpu->pUVM;
78	int rc;
79
80	AssertReleaseMsg(VALID_PTR(pUVM) && pUVM->u32Magic == UVM_MAGIC,
81	("Invalid arguments to the emulation thread!\n"));
82
83	rc = RTTlsSet(pUVM->vm.s.idxTLS, pUVCpu);
84	AssertReleaseMsgRCReturn(rc, ("RTTlsSet %x failed with %Rrc\n", pUVM->vm.s.idxTLS, rc), rc);
85
86	/*
87	* The request loop.
88	*/
89	rc = VINF_SUCCESS;
90	volatile VMSTATE enmBefore = VMSTATE_CREATING; /* volatile because of setjmp */
91	Log(("vmR3EmulationThread: Emulation thread starting the days work... Thread=%#x pUVM=%p\n", ThreadSelf, pUVM));
92	for (;;)
93	{
94	/* Requested to exit the EMT thread out of sync? (currently only VMR3WaitForResume) */
95	if (setjmp(pUVCpu->vm.s.emtJumpEnv) != 0)
96	{
97	rc = VINF_SUCCESS;
98	break;
99	}
100
101	/*
102	* During early init there is no pVM, so make a special path
103	* for that to keep things clearly separate.
104	*/
105	if (!pUVM->pVM)
106	{
107	/*
108	* Check for termination first.
109	*/
110	if (pUVM->vm.s.fTerminateEMT)
111	{
112	rc = VINF_EM_TERMINATE;
113	break;
114	}
115
116	/*
117	* Only the first VCPU may initialize the VM during early init
118	* and must therefore service all VMCPUID_ANY requests.
119	* See also VMR3Create
120	*/
121	if ( pUVM->vm.s.pReqs
122	&& pUVCpu->idCpu == 0)
123	{
124	/*
125	* Service execute in any EMT request.
126	*/
127	rc = VMR3ReqProcessU(pUVM, VMCPUID_ANY);
128	Log(("vmR3EmulationThread: Req rc=%Rrc, VM state %d -> %d\n", rc, enmBefore, pUVM->pVM ? pUVM->pVM->enmVMState : VMSTATE_CREATING));
129	}
130	else if (pUVCpu->vm.s.pReqs)
131	{
132	/*
133	* Service execute in specific EMT request.
134	*/
135	rc = VMR3ReqProcessU(pUVM, pUVCpu->idCpu);
136	Log(("vmR3EmulationThread: Req (cpu=%u) rc=%Rrc, VM state %d -> %d\n", pUVCpu->idCpu, rc, enmBefore, pUVM->pVM ? pUVM->pVM->enmVMState : VMSTATE_CREATING));
137	}
138	else
139	{
140	/*
141	* Nothing important is pending, so wait for something.
142	*/
143	rc = VMR3WaitU(pUVCpu);
144	if (RT_FAILURE(rc))
145	break;
146	}
147	}
148	else
149	{
150
151	/*
152	* Pending requests which needs servicing?
153	*
154	* We check for state changes in addition to status codes when
155	* servicing requests. (Look after the ifs.)
156	*/
157	PVM pVM = pUVM->pVM;
158	enmBefore = pVM->enmVMState;
159	if ( VM_FF_ISSET(pVM, VM_FF_TERMINATE)
160	\|\| pUVM->vm.s.fTerminateEMT)
161	{
162	rc = VINF_EM_TERMINATE;
163	break;
164	}
165	if (pUVM->vm.s.pReqs)
166	{
167	/*
168	* Service execute in any EMT request.
169	*/
170	rc = VMR3ReqProcessU(pUVM, VMCPUID_ANY);
171	Log(("vmR3EmulationThread: Req rc=%Rrc, VM state %d -> %d\n", rc, enmBefore, pVM->enmVMState));
172	}
173	else if (pUVCpu->vm.s.pReqs)
174	{
175	/*
176	* Service execute in specific EMT request.
177	*/
178	rc = VMR3ReqProcessU(pUVM, pUVCpu->idCpu);
179	Log(("vmR3EmulationThread: Req (cpu=%u) rc=%Rrc, VM state %d -> %d\n", pUVCpu->idCpu, rc, enmBefore, pVM->enmVMState));
180	}
181	else if (VM_FF_ISSET(pVM, VM_FF_DBGF))
182	{
183	/*
184	* Service the debugger request.
185	*/
186	rc = DBGFR3VMMForcedAction(pVM);
187	Log(("vmR3EmulationThread: Dbg rc=%Rrc, VM state %d -> %d\n", rc, enmBefore, pVM->enmVMState));
188	}
189	else if (VM_FF_ISSET(pVM, VM_FF_RESET))
190	{
191	/*
192	* Service a delayed reset request.
193	*/
194	rc = VMR3Reset(pVM);
195	VM_FF_CLEAR(pVM, VM_FF_RESET);
196	Log(("vmR3EmulationThread: Reset rc=%Rrc, VM state %d -> %d\n", rc, enmBefore, pVM->enmVMState));
197	}
198	else
199	{
200	/*
201	* Nothing important is pending, so wait for something.
202	*/
203	rc = VMR3WaitU(pUVCpu);
204	if (RT_FAILURE(rc))
205	break;
206	}
207
208	/*
209	* Check for termination requests, these have extremely high priority.
210	*/
211	if ( rc == VINF_EM_TERMINATE
212	\|\| VM_FF_ISSET(pVM, VM_FF_TERMINATE)
213	\|\| pUVM->vm.s.fTerminateEMT)
214	break;
215	}
216
217	/*
218	* Some requests (both VMR3Req* and the DBGF) can potentially
219	* resume or start the VM, in that case we'll get a change in
220	* VM status indicating that we're now running.
221	*/
222	if ( RT_SUCCESS(rc)
223	&& pUVM->pVM
224	&& enmBefore != pUVM->pVM->enmVMState
225	&& pUVM->pVM->enmVMState == VMSTATE_RUNNING)
226	{
227	PVM pVM = pUVM->pVM;
228	PVMCPU pVCpu = &pVM->aCpus[idCpu];
229
230	rc = EMR3ExecuteVM(pVM, pVCpu);
231	Log(("vmR3EmulationThread: EMR3ExecuteVM() -> rc=%Rrc, enmVMState=%d\n", rc, pVM->enmVMState));
232	if ( EMGetState(pVCpu) == EMSTATE_GURU_MEDITATION
233	&& pVM->enmVMState == VMSTATE_RUNNING)
234	vmR3SetState(pVM, VMSTATE_GURU_MEDITATION);
235	}
236
237	} /* forever */
238
239
240	/*
241	* Exiting.
242	*/
243	Log(("vmR3EmulationThread: Terminating emulation thread! Thread=%#x pUVM=%p rc=%Rrc enmBefore=%d enmVMState=%d\n",
244	ThreadSelf, pUVM, rc, enmBefore, pUVM->pVM ? pUVM->pVM->enmVMState : VMSTATE_TERMINATED));
245	if (pUVM->vm.s.fEMTDoesTheCleanup)
246	{
247	Log(("vmR3EmulationThread: executing delayed Destroy\n"));
248	Assert(pUVM->pVM);
249	vmR3Destroy(pUVM->pVM);
250	vmR3DestroyFinalBitFromEMT(pUVM);
251	}
252	else
253	{
254	vmR3DestroyFinalBitFromEMT(pUVM);
255
256	pUVCpu->vm.s.NativeThreadEMT = NIL_RTNATIVETHREAD;
257	}
258	Log(("vmR3EmulationThread: EMT is terminated.\n"));
259	return rc;
260	}
261
262
263	#if 0 /* not used */
264	/**
265	* Wait for VM to be resumed. Handle events like vmR3EmulationThread does.
266	* In case the VM is stopped, clean up and long jump to the main EMT loop.
267	*
268	* @returns VINF_SUCCESS or doesn't return
269	* @param pVM VM handle.
270	*/
271	VMMR3DECL(int) VMR3WaitForResume(PVM pVM)
272	{
273	/*
274	* The request loop.
275	*/
276	PUVMCPU pUVCpu;
277	PUVM pUVM = pVM->pUVM;
278	VMSTATE enmBefore;
279	int rc;
280
281	pUVCpu = (PUVMCPU)RTTlsGet(pUVM->vm.s.idxTLS);
282	AssertReturn(pUVCpu, VERR_INTERNAL_ERROR);
283
284	for (;;)
285	{
286
287	/*
288	* Pending requests which needs servicing?
289	*
290	* We check for state changes in addition to status codes when
291	* servicing requests. (Look after the ifs.)
292	*/
293	enmBefore = pVM->enmVMState;
294	if ( VM_FF_ISSET(pVM, VM_FF_TERMINATE)
295	\|\| pUVM->vm.s.fTerminateEMT)
296	{
297	rc = VINF_EM_TERMINATE;
298	break;
299	}
300	else if (pUVM->vm.s.pReqs)
301	{
302	/*
303	* Service execute in EMT request.
304	*/
305	rc = VMR3ReqProcessU(pUVM, VMCPUID_ANY);
306	Log(("vmR3EmulationThread: Req rc=%Rrc, VM state %d -> %d\n", rc, enmBefore, pVM->enmVMState));
307	}
308	else if (pUVCpu->vm.s.pReqs)
309	{
310	/*
311	* Service execute in EMT request.
312	*/
313	rc = VMR3ReqProcessU(pUVM, pUVCpu->idCpu);
314	Log(("vmR3EmulationThread: Req (cpu=%u) rc=%Rrc, VM state %d -> %d\n", pUVCpu->idCpu, rc, enmBefore, pVM->enmVMState));
315	}
316	else if (VM_FF_ISSET(pVM, VM_FF_DBGF))
317	{
318	/*
319	* Service the debugger request.
320	*/
321	rc = DBGFR3VMMForcedAction(pVM);
322	Log(("vmR3EmulationThread: Dbg rc=%Rrc, VM state %d -> %d\n", rc, enmBefore, pVM->enmVMState));
323	}
324	else if (VM_FF_ISSET(pVM, VM_FF_RESET))
325	{
326	/*
327	* Service a delay reset request.
328	*/
329	rc = VMR3Reset(pVM);
330	VM_FF_CLEAR(pVM, VM_FF_RESET);
331	Log(("vmR3EmulationThread: Reset rc=%Rrc, VM state %d -> %d\n", rc, enmBefore, pVM->enmVMState));
332	}
333	else
334	{
335	/*
336	* Nothing important is pending, so wait for something.
337	*/
338	rc = VMR3WaitU(pUVCpu);
339	if (RT_FAILURE(rc))
340	break;
341	}
342
343	/*
344	* Check for termination requests, these are extremely high priority.
345	*/
346	if ( rc == VINF_EM_TERMINATE
347	\|\| VM_FF_ISSET(pVM, VM_FF_TERMINATE)
348	\|\| pUVM->vm.s.fTerminateEMT)
349	break;
350
351	/*
352	* Some requests (both VMR3Req* and the DBGF) can potentially
353	* resume or start the VM, in that case we'll get a change in
354	* VM status indicating that we're now running.
355	*/
356	if ( RT_SUCCESS(rc)
357	&& enmBefore != pVM->enmVMState
358	&& pVM->enmVMState == VMSTATE_RUNNING)
359	{
360	/* Only valid exit reason. */
361	return VINF_SUCCESS;
362	}
363
364	} /* forever */
365
366	/* Return to the main loop in vmR3EmulationThread, which will clean up for us. */
367	longjmp(pUVCpu->vm.s.emtJumpEnv, 1);
368	}
369	#endif
370
371	/**
372	* Gets the name of a halt method.
373	*
374	* @returns Pointer to a read only string.
375	* @param enmMethod The method.
376	*/
377	static const char *vmR3GetHaltMethodName(VMHALTMETHOD enmMethod)
378	{
379	switch (enmMethod)
380	{
381	case VMHALTMETHOD_BOOTSTRAP: return "bootstrap";
382	case VMHALTMETHOD_DEFAULT: return "default";
383	case VMHALTMETHOD_OLD: return "old";
384	case VMHALTMETHOD_1: return "method1";
385	//case VMHALTMETHOD_2: return "method2";
386	case VMHALTMETHOD_GLOBAL_1: return "global1";
387	default: return "unknown";
388	}
389	}
390
391
392	/**
393	* The old halt loop.
394	*/
395	static DECLCALLBACK(int) vmR3HaltOldDoHalt(PUVMCPU pUVCpu, const uint32_t fMask, uint64_t /* u64Now*/)
396	{
397	/*
398	* Halt loop.
399	*/
400	PVM pVM = pUVCpu->pVM;
401	PVMCPU pVCpu = pUVCpu->pVCpu;
402
403	int rc = VINF_SUCCESS;
404	ASMAtomicWriteBool(&pUVCpu->vm.s.fWait, true);
405	//unsigned cLoops = 0;
406	for (;;)
407	{
408	/*
409	* Work the timers and check if we can exit.
410	* The poll call gives us the ticks left to the next event in
411	* addition to perhaps set an FF.
412	*/
413	STAM_REL_PROFILE_START(&pUVCpu->vm.s.StatHaltTimers, b);
414	TMR3TimerQueuesDo(pVM);
415	STAM_REL_PROFILE_STOP(&pUVCpu->vm.s.StatHaltTimers, b);
416	if ( VM_FF_ISPENDING(pVM, VM_FF_EXTERNAL_HALTED_MASK)
417	\|\| VMCPU_FF_ISPENDING(pVCpu, fMask))
418	break;
419	uint64_t u64NanoTS = TMVirtualToNano(pVM, TMTimerPoll(pVM));
420	if ( VM_FF_ISPENDING(pVM, VM_FF_EXTERNAL_HALTED_MASK)
421	\|\| VMCPU_FF_ISPENDING(pVCpu, fMask))
422	break;
423
424	/*
425	* Wait for a while. Someone will wake us up or interrupt the call if
426	* anything needs our attention.
427	*/
428	if (u64NanoTS < 50000)
429	{
430	//RTLogPrintf("u64NanoTS=%RI64 cLoops=%d spin\n", u64NanoTS, cLoops++);
431	/* spin */;
432	}
433	else
434	{
435	VMMR3YieldStop(pVM);
436	//uint64_t u64Start = RTTimeNanoTS();
437	if (u64NanoTS < 870000) /* this is a bit speculative... works fine on linux. */
438	{
439	//RTLogPrintf("u64NanoTS=%RI64 cLoops=%d yield", u64NanoTS, cLoops++);
440	STAM_REL_PROFILE_START(&pUVCpu->vm.s.StatHaltYield, a);
441	RTThreadYield(); /* this is the best we can do here */
442	STAM_REL_PROFILE_STOP(&pUVCpu->vm.s.StatHaltYield, a);
443	}
444	else if (u64NanoTS < 2000000)
445	{
446	//RTLogPrintf("u64NanoTS=%RI64 cLoops=%d sleep 1ms", u64NanoTS, cLoops++);
447	STAM_REL_PROFILE_START(&pUVCpu->vm.s.StatHaltBlock, a);
448	rc = RTSemEventWait(pUVCpu->vm.s.EventSemWait, 1);
449	STAM_REL_PROFILE_STOP(&pUVCpu->vm.s.StatHaltBlock, a);
450	}
451	else
452	{
453	//RTLogPrintf("u64NanoTS=%RI64 cLoops=%d sleep %dms", u64NanoTS, cLoops++, (uint32_t)RT_MIN((u64NanoTS - 500000) / 1000000, 15));
454	STAM_REL_PROFILE_START(&pUVCpu->vm.s.StatHaltBlock, a);
455	rc = RTSemEventWait(pUVCpu->vm.s.EventSemWait, RT_MIN((u64NanoTS - 1000000) / 1000000, 15));
456	STAM_REL_PROFILE_STOP(&pUVCpu->vm.s.StatHaltBlock, a);
457	}
458	//uint64_t u64Slept = RTTimeNanoTS() - u64Start;
459	//RTLogPrintf(" -> rc=%Rrc in %RU64 ns / %RI64 ns delta\n", rc, u64Slept, u64NanoTS - u64Slept);
460	}
461	if (rc == VERR_TIMEOUT)
462	rc = VINF_SUCCESS;
463	else if (RT_FAILURE(rc))
464	{
465	AssertRC(rc != VERR_INTERRUPTED);
466	AssertMsgFailed(("RTSemEventWait->%Rrc\n", rc));
467	ASMAtomicUoWriteBool(&pUVCpu->vm.s.fTerminateEMT, true);
468	VM_FF_SET(pVM, VM_FF_TERMINATE);
469	rc = VERR_INTERNAL_ERROR;
470	break;
471	}
472	}
473
474	ASMAtomicUoWriteBool(&pUVCpu->vm.s.fWait, false);
475	return rc;
476	}
477
478
479	/**
480	* Initialize the configuration of halt method 1 & 2.
481	*
482	* @return VBox status code. Failure on invalid CFGM data.
483	* @param pVM The VM handle.
484	*/
485	static int vmR3HaltMethod12ReadConfigU(PUVM pUVM)
486	{
487	/*
488	* The defaults.
489	*/
490	#if 1 /* DEBUGGING STUFF - REMOVE LATER */
491	pUVM->vm.s.Halt.Method12.u32LagBlockIntervalDivisorCfg = 4;
492	pUVM->vm.s.Halt.Method12.u32MinBlockIntervalCfg = 2*1000000;
493	pUVM->vm.s.Halt.Method12.u32MaxBlockIntervalCfg = 75*1000000;
494	pUVM->vm.s.Halt.Method12.u32StartSpinningCfg = 30*1000000;
495	pUVM->vm.s.Halt.Method12.u32StopSpinningCfg = 20*1000000;
496	#else
497	pUVM->vm.s.Halt.Method12.u32LagBlockIntervalDivisorCfg = 4;
498	pUVM->vm.s.Halt.Method12.u32MinBlockIntervalCfg = 5*1000000;
499	pUVM->vm.s.Halt.Method12.u32MaxBlockIntervalCfg = 200*1000000;
500	pUVM->vm.s.Halt.Method12.u32StartSpinningCfg = 20*1000000;
501	pUVM->vm.s.Halt.Method12.u32StopSpinningCfg = 2*1000000;
502	#endif
503
504	/*
505	* Query overrides.
506	*
507	* I don't have time to bother with niceities such as invalid value checks
508	* here right now. sorry.
509	*/
510	PCFGMNODE pCfg = CFGMR3GetChild(CFGMR3GetRoot(pUVM->pVM), "/VMM/HaltedMethod1");
511	if (pCfg)
512	{
513	uint32_t u32;
514	if (RT_SUCCESS(CFGMR3QueryU32(pCfg, "LagBlockIntervalDivisor", &u32)))
515	pUVM->vm.s.Halt.Method12.u32LagBlockIntervalDivisorCfg = u32;
516	if (RT_SUCCESS(CFGMR3QueryU32(pCfg, "MinBlockInterval", &u32)))
517	pUVM->vm.s.Halt.Method12.u32MinBlockIntervalCfg = u32;
518	if (RT_SUCCESS(CFGMR3QueryU32(pCfg, "MaxBlockInterval", &u32)))
519	pUVM->vm.s.Halt.Method12.u32MaxBlockIntervalCfg = u32;
520	if (RT_SUCCESS(CFGMR3QueryU32(pCfg, "StartSpinning", &u32)))
521	pUVM->vm.s.Halt.Method12.u32StartSpinningCfg = u32;
522	if (RT_SUCCESS(CFGMR3QueryU32(pCfg, "StopSpinning", &u32)))
523	pUVM->vm.s.Halt.Method12.u32StopSpinningCfg = u32;
524	LogRel(("HaltedMethod1 config: %d/%d/%d/%d/%d\n",
525	pUVM->vm.s.Halt.Method12.u32LagBlockIntervalDivisorCfg,
526	pUVM->vm.s.Halt.Method12.u32MinBlockIntervalCfg,
527	pUVM->vm.s.Halt.Method12.u32MaxBlockIntervalCfg,
528	pUVM->vm.s.Halt.Method12.u32StartSpinningCfg,
529	pUVM->vm.s.Halt.Method12.u32StopSpinningCfg));
530	}
531
532	return VINF_SUCCESS;
533	}
534
535
536	/**
537	* Initialize halt method 1.
538	*
539	* @return VBox status code.
540	* @param pUVM Pointer to the user mode VM structure.
541	*/
542	static DECLCALLBACK(int) vmR3HaltMethod1Init(PUVM pUVM)
543	{
544	return vmR3HaltMethod12ReadConfigU(pUVM);
545	}
546
547
548	/**
549	* Method 1 - Block whenever possible, and when lagging behind
550	* switch to spinning for 10-30ms with occational blocking until
551	* the lag has been eliminated.
552	*/
553	static DECLCALLBACK(int) vmR3HaltMethod1Halt(PUVMCPU pUVCpu, const uint32_t fMask, uint64_t u64Now)
554	{
555	PUVM pUVM = pUVCpu->pUVM;
556	PVMCPU pVCpu = pUVCpu->pVCpu;
557	PVM pVM = pUVCpu->pVM;
558
559	/*
560	* To simplify things, we decide up-front whether we should switch to spinning or
561	* not. This makes some ASSUMPTIONS about the cause of the spinning (PIT/RTC/PCNet)
562	* and that it will generate interrupts or other events that will cause us to exit
563	* the halt loop.
564	*/
565	bool fBlockOnce = false;
566	bool fSpinning = false;
567	uint32_t u32CatchUpPct = TMVirtualSyncGetCatchUpPct(pVM);
568	if (u32CatchUpPct /* non-zero if catching up */)
569	{
570	if (pUVCpu->vm.s.Halt.Method12.u64StartSpinTS)
571	{
572	fSpinning = TMVirtualSyncGetLag(pVM) >= pUVM->vm.s.Halt.Method12.u32StopSpinningCfg;
573	if (fSpinning)
574	{
575	uint64_t u64Lag = TMVirtualSyncGetLag(pVM);
576	fBlockOnce = u64Now - pUVCpu->vm.s.Halt.Method12.u64LastBlockTS
577	> RT_MAX(pUVM->vm.s.Halt.Method12.u32MinBlockIntervalCfg,
578	RT_MIN(u64Lag / pUVM->vm.s.Halt.Method12.u32LagBlockIntervalDivisorCfg,
579	pUVM->vm.s.Halt.Method12.u32MaxBlockIntervalCfg));
580	}
581	else
582	{
583	//RTLogRelPrintf("Stopped spinning (%u ms)\n", (u64Now - pUVCpu->vm.s.Halt.Method12.u64StartSpinTS) / 1000000);
584	pUVCpu->vm.s.Halt.Method12.u64StartSpinTS = 0;
585	}
586	}
587	else
588	{
589	fSpinning = TMVirtualSyncGetLag(pVM) >= pUVM->vm.s.Halt.Method12.u32StartSpinningCfg;
590	if (fSpinning)
591	pUVCpu->vm.s.Halt.Method12.u64StartSpinTS = u64Now;
592	}
593	}
594	else if (pUVCpu->vm.s.Halt.Method12.u64StartSpinTS)
595	{
596	//RTLogRelPrintf("Stopped spinning (%u ms)\n", (u64Now - pUVCpu->vm.s.Halt.Method12.u64StartSpinTS) / 1000000);
597	pUVCpu->vm.s.Halt.Method12.u64StartSpinTS = 0;
598	}
599
600	/*
601	* Halt loop.
602	*/
603	int rc = VINF_SUCCESS;
604	ASMAtomicWriteBool(&pUVCpu->vm.s.fWait, true);
605	unsigned cLoops = 0;
606	for (;; cLoops++)
607	{
608	/*
609	* Work the timers and check if we can exit.
610	*/
611	STAM_REL_PROFILE_START(&pUVCpu->vm.s.StatHaltTimers, b);
612	TMR3TimerQueuesDo(pVM);
613	STAM_REL_PROFILE_STOP(&pUVCpu->vm.s.StatHaltTimers, b);
614	if ( VM_FF_ISPENDING(pVM, VM_FF_EXTERNAL_HALTED_MASK)
615	\|\| VMCPU_FF_ISPENDING(pVCpu, fMask))
616	break;
617
618	/*
619	* Estimate time left to the next event.
620	*/
621	uint64_t u64NanoTS = TMVirtualToNano(pVM, TMTimerPoll(pVM));
622	if ( VM_FF_ISPENDING(pVM, VM_FF_EXTERNAL_HALTED_MASK)
623	\|\| VMCPU_FF_ISPENDING(pVCpu, fMask))
624	break;
625
626	/*
627	* Block if we're not spinning and the interval isn't all that small.
628	*/
629	if ( ( !fSpinning
630	\|\| fBlockOnce)
631	#if 1 /* DEBUGGING STUFF - REMOVE LATER */
632	&& u64NanoTS >= 100000) /* 0.100 ms */
633	#else
634	&& u64NanoTS >= 250000) /* 0.250 ms */
635	#endif
636	{
637	const uint64_t Start = pUVCpu->vm.s.Halt.Method12.u64LastBlockTS = RTTimeNanoTS();
638	VMMR3YieldStop(pVM);
639
640	uint32_t cMilliSecs = RT_MIN(u64NanoTS / 1000000, 15);
641	if (cMilliSecs <= pUVCpu->vm.s.Halt.Method12.cNSBlockedTooLongAvg)
642	cMilliSecs = 1;
643	else
644	cMilliSecs -= pUVCpu->vm.s.Halt.Method12.cNSBlockedTooLongAvg;
645	//RTLogRelPrintf("u64NanoTS=%RI64 cLoops=%3d sleep %02dms (%7RU64) ", u64NanoTS, cLoops, cMilliSecs, u64NanoTS);
646	STAM_REL_PROFILE_START(&pUVCpu->vm.s.StatHaltBlock, a);
647	rc = RTSemEventWait(pUVCpu->vm.s.EventSemWait, cMilliSecs);
648	STAM_REL_PROFILE_STOP(&pUVCpu->vm.s.StatHaltBlock, a);
649	if (rc == VERR_TIMEOUT)
650	rc = VINF_SUCCESS;
651	else if (RT_FAILURE(rc))
652	{
653	AssertRC(rc != VERR_INTERRUPTED);
654	AssertMsgFailed(("RTSemEventWait->%Rrc\n", rc));
655	ASMAtomicUoWriteBool(&pUVCpu->vm.s.fTerminateEMT, true);
656	VM_FF_SET(pVM, VM_FF_TERMINATE);
657	rc = VERR_INTERNAL_ERROR;
658	break;
659	}
660
661	/*
662	* Calc the statistics.
663	* Update averages every 16th time, and flush parts of the history every 64th time.
664	*/
665	const uint64_t Elapsed = RTTimeNanoTS() - Start;
666	pUVCpu->vm.s.Halt.Method12.cNSBlocked += Elapsed;
667	if (Elapsed > u64NanoTS)
668	pUVCpu->vm.s.Halt.Method12.cNSBlockedTooLong += Elapsed - u64NanoTS;
669	pUVCpu->vm.s.Halt.Method12.cBlocks++;
670	if (!(pUVCpu->vm.s.Halt.Method12.cBlocks & 0xf))
671	{
672	pUVCpu->vm.s.Halt.Method12.cNSBlockedTooLongAvg = pUVCpu->vm.s.Halt.Method12.cNSBlockedTooLong / pUVCpu->vm.s.Halt.Method12.cBlocks;
673	if (!(pUVCpu->vm.s.Halt.Method12.cBlocks & 0x3f))
674	{
675	pUVCpu->vm.s.Halt.Method12.cNSBlockedTooLong = pUVCpu->vm.s.Halt.Method12.cNSBlockedTooLongAvg * 0x40;
676	pUVCpu->vm.s.Halt.Method12.cBlocks = 0x40;
677	}
678	}
679	//RTLogRelPrintf(" -> %7RU64 ns / %7RI64 ns delta%s\n", Elapsed, Elapsed - u64NanoTS, fBlockOnce ? " (block once)" : "");
680
681	/*
682	* Clear the block once flag if we actually blocked.
683	*/
684	if ( fBlockOnce
685	&& Elapsed > 100000 /* 0.1 ms */)
686	fBlockOnce = false;
687	}
688	}
689	//if (fSpinning) RTLogRelPrintf("spun for %RU64 ns %u loops; lag=%RU64 pct=%d\n", RTTimeNanoTS() - u64Now, cLoops, TMVirtualSyncGetLag(pVM), u32CatchUpPct);
690
691	ASMAtomicUoWriteBool(&pUVCpu->vm.s.fWait, false);
692	return rc;
693	}
694
695
696	/**
697	* Initialize the global 1 halt method.
698	*
699	* @return VBox status code.
700	* @param pUVM Pointer to the user mode VM structure.
701	*/
702	static DECLCALLBACK(int) vmR3HaltGlobal1Init(PUVM pUVM)
703	{
704	return VINF_SUCCESS;
705	}
706
707
708	/**
709	* The global 1 halt method - Block in GMM (ring-0) and let it
710	* try take care of the global scheduling of EMT threads.
711	*/
712	static DECLCALLBACK(int) vmR3HaltGlobal1Halt(PUVMCPU pUVCpu, const uint32_t fMask, uint64_t u64Now)
713	{
714	PUVM pUVM = pUVCpu->pUVM;
715	PVMCPU pVCpu = pUVCpu->pVCpu;
716	PVM pVM = pUVCpu->pVM;
717	Assert(VMMGetCpu(pVM) == pVCpu);
718
719	/*
720	* Halt loop.
721	*/
722	int rc = VINF_SUCCESS;
723	ASMAtomicWriteBool(&pUVCpu->vm.s.fWait, true);
724	unsigned cLoops = 0;
725	for (;; cLoops++)
726	{
727	/*
728	* Work the timers and check if we can exit.
729	*/
730	STAM_REL_PROFILE_START(&pUVCpu->vm.s.StatHaltTimers, b);
731	TMR3TimerQueuesDo(pVM);
732	STAM_REL_PROFILE_STOP(&pUVCpu->vm.s.StatHaltTimers, b);
733	if ( VM_FF_ISPENDING(pVM, VM_FF_EXTERNAL_HALTED_MASK)
734	\|\| VMCPU_FF_ISPENDING(pVCpu, fMask))
735	break;
736
737	/*
738	* Estimate time left to the next event.
739	*/
740	uint64_t u64Delta;
741	uint64_t u64GipTime = TMTimerPollGIP(pVM, &u64Delta);
742	if ( VM_FF_ISPENDING(pVM, VM_FF_EXTERNAL_HALTED_MASK)
743	\|\| VMCPU_FF_ISPENDING(pVCpu, fMask))
744	break;
745
746	/*
747	* Block if we're not spinning and the interval isn't all that small.
748	*/
749	if (u64Delta > 50000 /* 0.050ms */)
750	{
751	VMMR3YieldStop(pVM);
752	if ( VM_FF_ISPENDING(pVM, VM_FF_EXTERNAL_HALTED_MASK)
753	\|\| VMCPU_FF_ISPENDING(pVCpu, fMask))
754	break;
755
756	//RTLogRelPrintf("u64NanoTS=%RI64 cLoops=%3d sleep %02dms (%7RU64) ", u64NanoTS, cLoops, cMilliSecs, u64NanoTS);
757	STAM_REL_PROFILE_START(&pUVCpu->vm.s.StatHaltBlock, c);
758	rc = SUPCallVMMR0Ex(pVM->pVMR0, pVCpu->idCpu, VMMR0_DO_GVMM_SCHED_HALT, u64GipTime, NULL);
759	STAM_REL_PROFILE_STOP(&pUVCpu->vm.s.StatHaltBlock, c);
760	if (rc == VERR_INTERRUPTED)
761	rc = VINF_SUCCESS;
762	else if (RT_FAILURE(rc))
763	{
764	AssertMsgFailed(("VMMR0_DO_GVMM_SCHED_HALT->%Rrc\n", rc));
765	ASMAtomicUoWriteBool(&pUVCpu->vm.s.fTerminateEMT, true);
766	VM_FF_SET(pVM, VM_FF_TERMINATE);
767	rc = VERR_INTERNAL_ERROR;
768	break;
769	}
770	}
771	/*
772	* When spinning call upon the GVMM and do some wakups once
773	* in a while, it's not like we're actually busy or anything.
774	*/
775	else if (!(cLoops & 0x1fff))
776	{
777	STAM_REL_PROFILE_START(&pUVCpu->vm.s.StatHaltYield, d);
778	rc = SUPCallVMMR0Ex(pVM->pVMR0, pVCpu->idCpu, VMMR0_DO_GVMM_SCHED_POLL, false /* don't yield */, NULL);
779	STAM_REL_PROFILE_STOP(&pUVCpu->vm.s.StatHaltYield, d);
780	}
781	}
782	//if (fSpinning) RTLogRelPrintf("spun for %RU64 ns %u loops; lag=%RU64 pct=%d\n", RTTimeNanoTS() - u64Now, cLoops, TMVirtualSyncGetLag(pVM), u32CatchUpPct);
783
784	ASMAtomicUoWriteBool(&pUVCpu->vm.s.fWait, false);
785	return rc;
786	}
787
788
789	/**
790	* The global 1 halt method - VMR3Wait() worker.
791	*
792	* @returns VBox status code.
793	* @param pUVCpu Pointer to the user mode VMCPU structure.
794	*/
795	static DECLCALLBACK(int) vmR3HaltGlobal1Wait(PUVMCPU pUVCpu)
796	{
797	ASMAtomicWriteBool(&pUVCpu->vm.s.fWait, true);
798
799	PVM pVM = pUVCpu->pUVM->pVM;
800	PVMCPU pVCpu = VMMGetCpu(pVM);
801	Assert(pVCpu->idCpu == pUVCpu->idCpu);
802
803	int rc = VINF_SUCCESS;
804	for (;;)
805	{
806	/*
807	* Check Relevant FFs.
808	*/
809	if ( VM_FF_ISPENDING(pVM, VM_FF_EXTERNAL_SUSPENDED_MASK)
810	\|\| VMCPU_FF_ISPENDING(pVCpu, VMCPU_FF_EXTERNAL_SUSPENDED_MASK))
811	break;
812
813	/*
814	* Wait for a while. Someone will wake us up or interrupt the call if
815	* anything needs our attention.
816	*/
817	rc = SUPCallVMMR0Ex(pVM->pVMR0, pVCpu->idCpu, VMMR0_DO_GVMM_SCHED_HALT, RTTimeNanoTS() + 1000000000 /* +1s */, NULL);
818	if (rc == VERR_INTERRUPTED)
819	rc = VINF_SUCCESS;
820	else if (RT_FAILURE(rc))
821	{
822	AssertMsgFailed(("RTSemEventWait->%Rrc\n", rc));
823	ASMAtomicUoWriteBool(&pUVCpu->vm.s.fTerminateEMT, true);
824	VM_FF_SET(pVM, VM_FF_TERMINATE);
825	rc = VERR_INTERNAL_ERROR;
826	break;
827	}
828
829	}
830
831	ASMAtomicUoWriteBool(&pUVCpu->vm.s.fWait, false);
832	return rc;
833	}
834
835
836	/**
837	* The global 1 halt method - VMR3NotifyFF() worker.
838	*
839	* @param pUVCpu Pointer to the user mode VMCPU structure.
840	* @param fFlags Notification flags, VMNOTIFYFF_FLAGS_*.
841	*/
842	static DECLCALLBACK(void) vmR3HaltGlobal1NotifyCpuFF(PUVMCPU pUVCpu, uint32_t fFlags)
843	{
844	if (pUVCpu->vm.s.fWait)
845	{
846	int rc = SUPCallVMMR0Ex(pUVCpu->pVM->pVMR0, pUVCpu->idCpu, VMMR0_DO_GVMM_SCHED_WAKE_UP, 0, NULL);
847	AssertRC(rc);
848	}
849	else if ( (fFlags & VMNOTIFYFF_FLAGS_POKE)
850	&& pUVCpu->pUVM->pVM
851	&& pUVCpu->pUVM->pVM->aCpus[pUVCpu->idCpu].enmState == VMCPUSTATE_RUN_EXEC) /** @todo make this easier to access. (pUVCpu->pVCpu) */
852	{
853	int rc = SUPCallVMMR0Ex(pUVCpu->pVM->pVMR0, pUVCpu->idCpu, VMMR0_DO_GVMM_SCHED_POKE, 0, NULL);
854	AssertRC(rc);
855	}
856	else if (!(fFlags & VMNOTIFYFF_FLAGS_DONE_REM)) /** @todo use VMCPUSTATE_RUN_EXEC_REM */
857	REMR3NotifyFF(pUVCpu->pVM);
858	}
859
860
861	/**
862	* Bootstrap VMR3Wait() worker.
863	*
864	* @returns VBox status code.
865	* @param pUVMCPU Pointer to the user mode VMCPU structure.
866	*/
867	static DECLCALLBACK(int) vmR3BootstrapWait(PUVMCPU pUVCpu)
868	{
869	PUVM pUVM = pUVCpu->pUVM;
870
871	ASMAtomicWriteBool(&pUVCpu->vm.s.fWait, true);
872
873	int rc = VINF_SUCCESS;
874	for (;;)
875	{
876	/*
877	* Check Relevant FFs.
878	*/
879	if (pUVM->vm.s.pReqs) /* global requests pending? */
880	break;
881	if (pUVCpu->vm.s.pReqs) /* local requests pending? */
882	break;
883
884	if ( pUVCpu->pVM
885	&& ( VM_FF_ISPENDING(pUVCpu->pVM, VM_FF_EXTERNAL_SUSPENDED_MASK)
886	\|\| VMCPU_FF_ISPENDING(VMMGetCpu(pUVCpu->pVM), VMCPU_FF_EXTERNAL_SUSPENDED_MASK)
887	)
888	)
889	break;
890	if (pUVCpu->vm.s.fTerminateEMT)
891	break;
892
893	/*
894	* Wait for a while. Someone will wake us up or interrupt the call if
895	* anything needs our attention.
896	*/
897	rc = RTSemEventWait(pUVCpu->vm.s.EventSemWait, 1000);
898	if (rc == VERR_TIMEOUT)
899	rc = VINF_SUCCESS;
900	else if (RT_FAILURE(rc))
901	{
902	AssertMsgFailed(("RTSemEventWait->%Rrc\n", rc));
903	ASMAtomicUoWriteBool(&pUVCpu->vm.s.fTerminateEMT, true);
904	if (pUVCpu->pVM)
905	VM_FF_SET(pUVCpu->pVM, VM_FF_TERMINATE);
906	rc = VERR_INTERNAL_ERROR;
907	break;
908	}
909
910	}
911
912	ASMAtomicUoWriteBool(&pUVCpu->vm.s.fWait, false);
913	return rc;
914	}
915
916
917	/**
918	* Bootstrap VMR3NotifyFF() worker.
919	*
920	* @param pUVCpu Pointer to the user mode VMCPU structure.
921	* @param fFlags Notification flags, VMNOTIFYFF_FLAGS_*.
922	*/
923	static DECLCALLBACK(void) vmR3BootstrapNotifyCpuFF(PUVMCPU pUVCpu, uint32_t fFlags)
924	{
925	if (pUVCpu->vm.s.fWait)
926	{
927	int rc = RTSemEventSignal(pUVCpu->vm.s.EventSemWait);
928	AssertRC(rc);
929	}
930	NOREF(fFlags);
931	}
932
933
934	/**
935	* Default VMR3Wait() worker.
936	*
937	* @returns VBox status code.
938	* @param pUVMCPU Pointer to the user mode VMCPU structure.
939	*/
940	static DECLCALLBACK(int) vmR3DefaultWait(PUVMCPU pUVCpu)
941	{
942	ASMAtomicWriteBool(&pUVCpu->vm.s.fWait, true);
943
944	PVM pVM = pUVCpu->pVM;
945	PVMCPU pVCpu = pUVCpu->pVCpu;
946	int rc = VINF_SUCCESS;
947	for (;;)
948	{
949	/*
950	* Check Relevant FFs.
951	*/
952	if ( VM_FF_ISPENDING(pVM, VM_FF_EXTERNAL_SUSPENDED_MASK)
953	\|\| VMCPU_FF_ISPENDING(pVCpu, VMCPU_FF_EXTERNAL_SUSPENDED_MASK))
954	break;
955
956	/*
957	* Wait for a while. Someone will wake us up or interrupt the call if
958	* anything needs our attention.
959	*/
960	rc = RTSemEventWait(pUVCpu->vm.s.EventSemWait, 1000);
961	if (rc == VERR_TIMEOUT)
962	rc = VINF_SUCCESS;
963	else if (RT_FAILURE(rc))
964	{
965	AssertMsgFailed(("RTSemEventWait->%Rrc\n", rc));
966	ASMAtomicUoWriteBool(&pUVCpu->vm.s.fTerminateEMT, true);
967	VM_FF_SET(pVM, VM_FF_TERMINATE);
968	rc = VERR_INTERNAL_ERROR;
969	break;
970	}
971
972	}
973
974	ASMAtomicUoWriteBool(&pUVCpu->vm.s.fWait, false);
975	return rc;
976	}
977
978
979	/**
980	* Default VMR3NotifyFF() worker.
981	*
982	* @param pUVCpu Pointer to the user mode VMCPU structure.
983	* @param fFlags Notification flags, VMNOTIFYFF_FLAGS_*.
984	*/
985	static DECLCALLBACK(void) vmR3DefaultNotifyCpuFF(PUVMCPU pUVCpu, uint32_t fFlags)
986	{
987	if (pUVCpu->vm.s.fWait)
988	{
989	int rc = RTSemEventSignal(pUVCpu->vm.s.EventSemWait);
990	AssertRC(rc);
991	}
992	else if (!(fFlags & VMNOTIFYFF_FLAGS_DONE_REM))
993	REMR3NotifyFF(pUVCpu->pVM);
994	}
995
996
997	/**
998	* Array with halt method descriptors.
999	* VMINT::iHaltMethod contains an index into this array.
1000	*/
1001	static const struct VMHALTMETHODDESC
1002	{
1003	/** The halt method id. */
1004	VMHALTMETHOD enmHaltMethod;
1005	/** The init function for loading config and initialize variables. */
1006	DECLR3CALLBACKMEMBER(int, pfnInit,(PUVM pUVM));
1007	/** The term function. */
1008	DECLR3CALLBACKMEMBER(void, pfnTerm,(PUVM pUVM));
1009	/** The VMR3WaitHaltedU function. */
1010	DECLR3CALLBACKMEMBER(int, pfnHalt,(PUVMCPU pUVCpu, const uint32_t fMask, uint64_t u64Now));
1011	/** The VMR3WaitU function. */
1012	DECLR3CALLBACKMEMBER(int, pfnWait,(PUVMCPU pUVCpu));
1013	/** The VMR3NotifyCpuFFU function. */
1014	DECLR3CALLBACKMEMBER(void, pfnNotifyCpuFF,(PUVMCPU pUVCpu, uint32_t fFlags));
1015	/** The VMR3NotifyGlobalFFU function. */
1016	DECLR3CALLBACKMEMBER(void, pfnNotifyGlobalFF,(PUVM pUVM, uint32_t fFlags));
1017	} g_aHaltMethods[] =
1018	{
1019	{ VMHALTMETHOD_BOOTSTRAP, NULL, NULL, NULL, vmR3BootstrapWait, vmR3BootstrapNotifyCpuFF, NULL },
1020	{ VMHALTMETHOD_OLD, NULL, NULL, vmR3HaltOldDoHalt, vmR3DefaultWait, vmR3DefaultNotifyCpuFF, NULL },
1021	{ VMHALTMETHOD_1, vmR3HaltMethod1Init, NULL, vmR3HaltMethod1Halt, vmR3DefaultWait, vmR3DefaultNotifyCpuFF, NULL },
1022	{ VMHALTMETHOD_GLOBAL_1, vmR3HaltGlobal1Init, NULL, vmR3HaltGlobal1Halt, vmR3HaltGlobal1Wait, vmR3HaltGlobal1NotifyCpuFF, NULL },
1023	};
1024
1025
1026	/**
1027	* Notify the emulation thread (EMT) about pending Forced Action (FF).
1028	*
1029	* This function is called by thread other than EMT to make
1030	* sure EMT wakes up and promptly service an FF request.
1031	*
1032	* @param pUVM Pointer to the user mode VM structure.
1033	* @param fFlags Notification flags, VMNOTIFYFF_FLAGS_*.
1034	*/
1035	VMMR3DECL(void) VMR3NotifyGlobalFFU(PUVM pUVM, uint32_t fFlags)
1036	{
1037	LogFlow(("VMR3NotifyGlobalFFU:\n"));
1038	uint32_t iHaldMethod = pUVM->vm.s.iHaltMethod;
1039
1040	if (g_aHaltMethods[iHaldMethod].pfnNotifyGlobalFF) /** @todo make mandatory. */
1041	g_aHaltMethods[iHaldMethod].pfnNotifyGlobalFF(pUVM, fFlags);
1042	else
1043	for (VMCPUID iCpu = 0; iCpu < pUVM->cCpus; iCpu++)
1044	g_aHaltMethods[iHaldMethod].pfnNotifyCpuFF(&pUVM->aCpus[iCpu], fFlags);
1045	}
1046
1047
1048	/**
1049	* Notify the emulation thread (EMT) about pending Forced Action (FF).
1050	*
1051	* This function is called by thread other than EMT to make
1052	* sure EMT wakes up and promptly service an FF request.
1053	*
1054	* @param pUVM Pointer to the user mode VM structure.
1055	* @param fFlags Notification flags, VMNOTIFYFF_FLAGS_*.
1056	*/
1057	VMMR3DECL(void) VMR3NotifyCpuFFU(PUVMCPU pUVCpu, uint32_t fFlags)
1058	{
1059	PUVM pUVM = pUVCpu->pUVM;
1060
1061	LogFlow(("VMR3NotifyCpuFFU:\n"));
1062	g_aHaltMethods[pUVM->vm.s.iHaltMethod].pfnNotifyCpuFF(pUVCpu, fFlags);
1063	}
1064
1065
1066	/**
1067	* Halted VM Wait.
1068	* Any external event will unblock the thread.
1069	*
1070	* @returns VINF_SUCCESS unless a fatal error occured. In the latter
1071	* case an appropriate status code is returned.
1072	* @param pVM VM handle.
1073	* @param pVCpu VMCPU handle.
1074	* @param fIgnoreInterrupts If set the VM_FF_INTERRUPT flags is ignored.
1075	* @thread The emulation thread.
1076	*/
1077	VMMR3DECL(int) VMR3WaitHalted(PVM pVM, PVMCPU pVCpu, bool fIgnoreInterrupts)
1078	{
1079	LogFlow(("VMR3WaitHalted: fIgnoreInterrupts=%d\n", fIgnoreInterrupts));
1080
1081	/*
1082	* Check Relevant FFs.
1083	*/
1084	const uint32_t fMask = !fIgnoreInterrupts
1085	? VMCPU_FF_EXTERNAL_HALTED_MASK
1086	: VMCPU_FF_EXTERNAL_HALTED_MASK & ~(VMCPU_FF_INTERRUPT_APIC \| VMCPU_FF_INTERRUPT_PIC);
1087	if ( VM_FF_ISPENDING(pVM, VM_FF_EXTERNAL_HALTED_MASK)
1088	\|\| VMCPU_FF_ISPENDING(pVCpu, fMask))
1089	{
1090	LogFlow(("VMR3WaitHalted: returns VINF_SUCCESS (FF %#x FFCPU %#x)\n", pVM->fGlobalForcedActions, pVCpu->fLocalForcedActions));
1091	return VINF_SUCCESS;
1092	}
1093
1094	/*
1095	* The yielder is suspended while we're halting, while TM might have clock(s) running
1096	* only at certain times and need to be notified..
1097	*/
1098	VMMR3YieldSuspend(pVM);
1099	TMNotifyStartOfHalt(pVCpu);
1100
1101	/*
1102	* Record halt averages for the last second.
1103	*/
1104	PUVMCPU pUVCpu = pVCpu->pUVCpu;
1105	uint64_t u64Now = RTTimeNanoTS();
1106	int64_t off = u64Now - pUVCpu->vm.s.u64HaltsStartTS;
1107	if (off > 1000000000)
1108	{
1109	if (off > _4G \|\| !pUVCpu->vm.s.cHalts)
1110	{
1111	pUVCpu->vm.s.HaltInterval = 1000000000 /* 1 sec */;
1112	pUVCpu->vm.s.HaltFrequency = 1;
1113	}
1114	else
1115	{
1116	pUVCpu->vm.s.HaltInterval = (uint32_t)off / pUVCpu->vm.s.cHalts;
1117	pUVCpu->vm.s.HaltFrequency = ASMMultU64ByU32DivByU32(pUVCpu->vm.s.cHalts, 1000000000, (uint32_t)off);
1118	}
1119	pUVCpu->vm.s.u64HaltsStartTS = u64Now;
1120	pUVCpu->vm.s.cHalts = 0;
1121	}
1122	pUVCpu->vm.s.cHalts++;
1123
1124	/*
1125	* Do the halt.
1126	*/
1127	PUVM pUVM = pUVCpu->pUVM;
1128	int rc = g_aHaltMethods[pUVM->vm.s.iHaltMethod].pfnHalt(pUVCpu, fMask, u64Now);
1129
1130	/*
1131	* Notify TM and resume the yielder
1132	*/
1133	TMNotifyEndOfHalt(pVCpu);
1134	VMMR3YieldResume(pVM);
1135
1136	LogFlow(("VMR3WaitHalted: returns %Rrc (FF %#x)\n", rc, pVM->fGlobalForcedActions));
1137	return rc;
1138	}
1139
1140
1141	/**
1142	* Suspended VM Wait.
1143	* Only a handful of forced actions will cause the function to
1144	* return to the caller.
1145	*
1146	* @returns VINF_SUCCESS unless a fatal error occured. In the latter
1147	* case an appropriate status code is returned.
1148	* @param pUVCpu Pointer to the user mode VMCPU structure.
1149	* @thread The emulation thread.
1150	*/
1151	VMMR3DECL(int) VMR3WaitU(PUVMCPU pUVCpu)
1152	{
1153	LogFlow(("VMR3WaitU:\n"));
1154
1155	/*
1156	* Check Relevant FFs.
1157	*/
1158	PVM pVM = pUVCpu->pVM;
1159	PVMCPU pVCpu = pUVCpu->pVCpu;
1160
1161	if ( pVM
1162	&& ( VM_FF_ISPENDING(pVM, VM_FF_EXTERNAL_SUSPENDED_MASK)
1163	\|\| VMCPU_FF_ISPENDING(pVCpu, VMCPU_FF_EXTERNAL_SUSPENDED_MASK)
1164	)
1165	)
1166	{
1167	LogFlow(("VMR3Wait: returns VINF_SUCCESS (FF %#x)\n", pVM->fGlobalForcedActions));
1168	return VINF_SUCCESS;
1169	}
1170
1171	/*
1172	* Do waiting according to the halt method (so VMR3NotifyFF
1173	* doesn't have to special case anything).
1174	*/
1175	PUVM pUVM = pUVCpu->pUVM;
1176	int rc = g_aHaltMethods[pUVM->vm.s.iHaltMethod].pfnWait(pUVCpu);
1177	LogFlow(("VMR3WaitU: returns %Rrc (FF %#x)\n", rc, pVM ? pVM->fGlobalForcedActions : 0));
1178	return rc;
1179	}
1180
1181
1182	/**
1183	* Changes the halt method.
1184	*
1185	* @returns VBox status code.
1186	* @param pUVM Pointer to the user mode VM structure.
1187	* @param enmHaltMethod The new halt method.
1188	* @thread EMT.
1189	*/
1190	int vmR3SetHaltMethodU(PUVM pUVM, VMHALTMETHOD enmHaltMethod)
1191	{
1192	PVM pVM = pUVM->pVM; Assert(pVM);
1193	VM_ASSERT_EMT(pVM);
1194	AssertReturn(enmHaltMethod > VMHALTMETHOD_INVALID && enmHaltMethod < VMHALTMETHOD_END, VERR_INVALID_PARAMETER);
1195
1196	/*
1197	* Resolve default (can be overridden in the configuration).
1198	*/
1199	if (enmHaltMethod == VMHALTMETHOD_DEFAULT)
1200	{
1201	uint32_t u32;
1202	int rc = CFGMR3QueryU32(CFGMR3GetChild(CFGMR3GetRoot(pVM), "VM"), "HaltMethod", &u32);
1203	if (RT_SUCCESS(rc))
1204	{
1205	enmHaltMethod = (VMHALTMETHOD)u32;
1206	if (enmHaltMethod <= VMHALTMETHOD_INVALID \|\| enmHaltMethod >= VMHALTMETHOD_END)
1207	return VMSetError(pVM, VERR_INVALID_PARAMETER, RT_SRC_POS, N_("Invalid VM/HaltMethod value %d"), enmHaltMethod);
1208	}
1209	else if (rc == VERR_CFGM_VALUE_NOT_FOUND \|\| rc == VERR_CFGM_CHILD_NOT_FOUND)
1210	return VMSetError(pVM, rc, RT_SRC_POS, N_("Failed to Query VM/HaltMethod as uint32_t"));
1211	else
1212	enmHaltMethod = VMHALTMETHOD_GLOBAL_1;
1213	//enmHaltMethod = VMHALTMETHOD_1;
1214	//enmHaltMethod = VMHALTMETHOD_OLD;
1215	}
1216	LogRel(("VM: Halt method %s (%d)\n", vmR3GetHaltMethodName(enmHaltMethod), enmHaltMethod));
1217
1218	/*
1219	* Find the descriptor.
1220	*/
1221	unsigned i = 0;
1222	while ( i < RT_ELEMENTS(g_aHaltMethods)
1223	&& g_aHaltMethods[i].enmHaltMethod != enmHaltMethod)
1224	i++;
1225	AssertReturn(i < RT_ELEMENTS(g_aHaltMethods), VERR_INVALID_PARAMETER);
1226
1227	/*
1228	* Terminate the old one.
1229	*/
1230	if ( pUVM->vm.s.enmHaltMethod != VMHALTMETHOD_INVALID
1231	&& g_aHaltMethods[pUVM->vm.s.iHaltMethod].pfnTerm)
1232	{
1233	g_aHaltMethods[pUVM->vm.s.iHaltMethod].pfnTerm(pUVM);
1234	pUVM->vm.s.enmHaltMethod = VMHALTMETHOD_INVALID;
1235	}
1236
1237	/** @todo SMP: Need rendezvous thing here, the other EMTs must not be
1238	* sleeping when we switch the notification method or we'll never
1239	* manage to wake them up properly and end up relying on timeouts... */
1240
1241	/*
1242	* Init the new one.
1243	*/
1244	memset(&pUVM->vm.s.Halt, 0, sizeof(pUVM->vm.s.Halt));
1245	if (g_aHaltMethods[i].pfnInit)
1246	{
1247	int rc = g_aHaltMethods[i].pfnInit(pUVM);
1248	AssertRCReturn(rc, rc);
1249	}
1250	pUVM->vm.s.enmHaltMethod = enmHaltMethod;
1251
1252	ASMAtomicWriteU32(&pUVM->vm.s.iHaltMethod, i);
1253	return VINF_SUCCESS;
1254	}
1255

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source: vbox/trunk/src/VBox/VMM/VMEmt.cpp@ 19420

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