VMEmt.cpp@ 19217

Last change on this file since 19217 was 19217, checked in by vboxsync, 16 years ago
UVM splitup for SMP guests. Global and local request packets supported.
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File size: 41.9 KB

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1	/* $Id: VMEmt.cpp 19217 2009-04-27 15:00:59Z 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 pUVCpu = (PUVMCPU)pvArgs;
57	PUVM pUVM = pUVCpu->pUVM;
58	RTCPUID idCpu = pUVCpu->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, pUVCpu);
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(pUVCpu->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
97	if (pUVM->vm.s.pReqs)
98	{
99	/*
100	* Service execute in EMT request.
101	*/
102	rc = VMR3ReqProcessU(pUVM, VMREQDEST_ANY);
103	Log(("vmR3EmulationThread: Req rc=%Rrc, VM state %d -> %d\n", rc, enmBefore, pUVM->pVM ? pUVM->pVM->enmVMState : VMSTATE_CREATING));
104	}
105	else
106	if (pUVCpu->vm.s.pReqs)
107	{
108	/*
109	* Service execute in EMT request.
110	*/
111	rc = VMR3ReqProcessU(pUVM, (VMREQDEST)pUVCpu->idCpu);
112	Log(("vmR3EmulationThread: Req (cpu=%d) rc=%Rrc, VM state %d -> %d\n", pUVCpu->idCpu, rc, enmBefore, pUVM->pVM ? pUVM->pVM->enmVMState : VMSTATE_CREATING));
113	}
114	else
115	{
116	/*
117	* Nothing important is pending, so wait for something.
118	*/
119	rc = VMR3WaitU(pUVCpu);
120	if (RT_FAILURE(rc))
121	break;
122	}
123	}
124	else
125	{
126
127	/*
128	* Pending requests which needs servicing?
129	*
130	* We check for state changes in addition to status codes when
131	* servicing requests. (Look after the ifs.)
132	*/
133	PVM pVM = pUVM->pVM;
134	enmBefore = pVM->enmVMState;
135	if ( VM_FF_ISSET(pVM, VM_FF_TERMINATE)
136	\|\| pUVM->vm.s.fTerminateEMT)
137	{
138	rc = VINF_EM_TERMINATE;
139	break;
140	}
141	if (pUVM->vm.s.pReqs)
142	{
143	/*
144	* Service execute in EMT request.
145	*/
146	rc = VMR3ReqProcessU(pUVM, VMREQDEST_ANY);
147	Log(("vmR3EmulationThread: Req rc=%Rrc, VM state %d -> %d\n", rc, enmBefore, pVM->enmVMState));
148	}
149	else if (pUVCpu->vm.s.pReqs)
150	{
151	/*
152	* Service execute in EMT request.
153	*/
154	rc = VMR3ReqProcessU(pUVM, (VMREQDEST)pUVCpu->idCpu);
155	Log(("vmR3EmulationThread: Req (cpu=%d)rc=%Rrc, VM state %d -> %d\n", pUVCpu->idCpu, rc, enmBefore, pVM->enmVMState));
156	}
157	else if (VM_FF_ISSET(pVM, VM_FF_DBGF))
158	{
159	/*
160	* Service the debugger request.
161	*/
162	rc = DBGFR3VMMForcedAction(pVM);
163	Log(("vmR3EmulationThread: Dbg rc=%Rrc, VM state %d -> %d\n", rc, enmBefore, pVM->enmVMState));
164	}
165	else if (VM_FF_ISSET(pVM, VM_FF_RESET))
166	{
167	/*
168	* Service a delayed reset request.
169	*/
170	rc = VMR3Reset(pVM);
171	VM_FF_CLEAR(pVM, VM_FF_RESET);
172	Log(("vmR3EmulationThread: Reset rc=%Rrc, VM state %d -> %d\n", rc, enmBefore, pVM->enmVMState));
173	}
174	else
175	{
176	/*
177	* Nothing important is pending, so wait for something.
178	*/
179	rc = VMR3WaitU(pUVCpu);
180	if (RT_FAILURE(rc))
181	break;
182	}
183
184	/*
185	* Check for termination requests, these have extremely high priority.
186	*/
187	if ( rc == VINF_EM_TERMINATE
188	\|\| VM_FF_ISSET(pVM, VM_FF_TERMINATE)
189	\|\| pUVM->vm.s.fTerminateEMT)
190	break;
191	}
192
193	/*
194	* Some requests (both VMR3Req* and the DBGF) can potentially
195	* resume or start the VM, in that case we'll get a change in
196	* VM status indicating that we're now running.
197	*/
198	if ( RT_SUCCESS(rc)
199	&& pUVM->pVM
200	&& enmBefore != pUVM->pVM->enmVMState
201	&& pUVM->pVM->enmVMState == VMSTATE_RUNNING)
202	{
203	PVM pVM = pUVM->pVM;
204	PVMCPU pVCpu = &pVM->aCpus[idCpu];
205
206	rc = EMR3ExecuteVM(pVM, pVCpu);
207	Log(("vmR3EmulationThread: EMR3ExecuteVM() -> rc=%Rrc, enmVMState=%d\n", rc, pVM->enmVMState));
208	if ( EMGetState(pVCpu) == EMSTATE_GURU_MEDITATION
209	&& pVM->enmVMState == VMSTATE_RUNNING)
210	vmR3SetState(pVM, VMSTATE_GURU_MEDITATION);
211	}
212
213	} /* forever */
214
215
216	/*
217	* Exiting.
218	*/
219	Log(("vmR3EmulationThread: Terminating emulation thread! Thread=%#x pUVM=%p rc=%Rrc enmBefore=%d enmVMState=%d\n",
220	ThreadSelf, pUVM, rc, enmBefore, pUVM->pVM ? pUVM->pVM->enmVMState : VMSTATE_TERMINATED));
221	if (pUVM->vm.s.fEMTDoesTheCleanup)
222	{
223	Log(("vmR3EmulationThread: executing delayed Destroy\n"));
224	Assert(pUVM->pVM);
225	vmR3Destroy(pUVM->pVM);
226	vmR3DestroyFinalBitFromEMT(pUVM);
227	}
228	else
229	{
230	vmR3DestroyFinalBitFromEMT(pUVM);
231
232	pUVCpu->vm.s.NativeThreadEMT = NIL_RTNATIVETHREAD;
233	}
234	Log(("vmR3EmulationThread: EMT is terminated.\n"));
235	return rc;
236	}
237
238
239	/**
240	* Wait for VM to be resumed. Handle events like vmR3EmulationThread does.
241	* In case the VM is stopped, clean up and long jump to the main EMT loop.
242	*
243	* @returns VINF_SUCCESS or doesn't return
244	* @param pVM VM handle.
245	*/
246	VMMR3DECL(int) VMR3WaitForResume(PVM pVM)
247	{
248	/*
249	* The request loop.
250	*/
251	PUVMCPU pUVCpu;
252	PUVM pUVM = pVM->pUVM;
253	VMSTATE enmBefore;
254	int rc;
255
256	pUVCpu = (PUVMCPU)RTTlsGet(pUVM->vm.s.idxTLS);
257	AssertReturn(pUVCpu, VERR_INTERNAL_ERROR);
258
259	for (;;)
260	{
261
262	/*
263	* Pending requests which needs servicing?
264	*
265	* We check for state changes in addition to status codes when
266	* servicing requests. (Look after the ifs.)
267	*/
268	enmBefore = pVM->enmVMState;
269	if ( VM_FF_ISSET(pVM, VM_FF_TERMINATE)
270	\|\| pUVM->vm.s.fTerminateEMT)
271	{
272	rc = VINF_EM_TERMINATE;
273	break;
274	}
275	else if (pUVM->vm.s.pReqs)
276	{
277	/*
278	* Service execute in EMT request.
279	*/
280	rc = VMR3ReqProcessU(pUVM, VMREQDEST_ANY);
281	Log(("vmR3EmulationThread: Req rc=%Rrc, VM state %d -> %d\n", rc, enmBefore, pVM->enmVMState));
282	}
283	else if (pUVCpu->vm.s.pReqs)
284	{
285	/*
286	* Service execute in EMT request.
287	*/
288	rc = VMR3ReqProcessU(pUVM, (VMREQDEST)pUVCpu->idCpu);
289	Log(("vmR3EmulationThread: Req (cpu=%d)rc=%Rrc, VM state %d -> %d\n", pUVCpu->idCpu, rc, enmBefore, pVM->enmVMState));
290	}
291	else if (VM_FF_ISSET(pVM, VM_FF_DBGF))
292	{
293	/*
294	* Service the debugger request.
295	*/
296	rc = DBGFR3VMMForcedAction(pVM);
297	Log(("vmR3EmulationThread: Dbg rc=%Rrc, VM state %d -> %d\n", rc, enmBefore, pVM->enmVMState));
298	}
299	else if (VM_FF_ISSET(pVM, VM_FF_RESET))
300	{
301	/*
302	* Service a delay reset request.
303	*/
304	rc = VMR3Reset(pVM);
305	VM_FF_CLEAR(pVM, VM_FF_RESET);
306	Log(("vmR3EmulationThread: Reset rc=%Rrc, VM state %d -> %d\n", rc, enmBefore, pVM->enmVMState));
307	}
308	else
309	{
310	/*
311	* Nothing important is pending, so wait for something.
312	*/
313	rc = VMR3WaitU(pUVCpu);
314	if (RT_FAILURE(rc))
315	break;
316	}
317
318	/*
319	* Check for termination requests, these are extremely high priority.
320	*/
321	if ( rc == VINF_EM_TERMINATE
322	\|\| VM_FF_ISSET(pVM, VM_FF_TERMINATE)
323	\|\| pUVM->vm.s.fTerminateEMT)
324	break;
325
326	/*
327	* Some requests (both VMR3Req* and the DBGF) can potentially
328	* resume or start the VM, in that case we'll get a change in
329	* VM status indicating that we're now running.
330	*/
331	if ( RT_SUCCESS(rc)
332	&& enmBefore != pVM->enmVMState
333	&& pVM->enmVMState == VMSTATE_RUNNING)
334	{
335	/* Only valid exit reason. */
336	return VINF_SUCCESS;
337	}
338
339	} /* forever */
340
341	/* Return to the main loop in vmR3EmulationThread, which will clean up for us. */
342	longjmp(pUVCpu->vm.s.emtJumpEnv, 1);
343	}
344
345
346	/**
347	* Gets the name of a halt method.
348	*
349	* @returns Pointer to a read only string.
350	* @param enmMethod The method.
351	*/
352	static const char *vmR3GetHaltMethodName(VMHALTMETHOD enmMethod)
353	{
354	switch (enmMethod)
355	{
356	case VMHALTMETHOD_BOOTSTRAP: return "bootstrap";
357	case VMHALTMETHOD_DEFAULT: return "default";
358	case VMHALTMETHOD_OLD: return "old";
359	case VMHALTMETHOD_1: return "method1";
360	//case VMHALTMETHOD_2: return "method2";
361	case VMHALTMETHOD_GLOBAL_1: return "global1";
362	default: return "unknown";
363	}
364	}
365
366
367	/**
368	* The old halt loop.
369	*/
370	static DECLCALLBACK(int) vmR3HaltOldDoHalt(PUVMCPU pUVCpu, const uint32_t fMask, uint64_t /* u64Now*/)
371	{
372	/*
373	* Halt loop.
374	*/
375	PVM pVM = pUVCpu->pVM;
376	PVMCPU pVCpu = pUVCpu->pVCpu;
377
378	int rc = VINF_SUCCESS;
379	ASMAtomicWriteBool(&pUVCpu->vm.s.fWait, true);
380	//unsigned cLoops = 0;
381	for (;;)
382	{
383	/*
384	* Work the timers and check if we can exit.
385	* The poll call gives us the ticks left to the next event in
386	* addition to perhaps set an FF.
387	*/
388	STAM_REL_PROFILE_START(&pUVCpu->vm.s.StatHaltTimers, b);
389	TMR3TimerQueuesDo(pVM);
390	STAM_REL_PROFILE_STOP(&pUVCpu->vm.s.StatHaltTimers, b);
391	if ( VM_FF_ISPENDING(pVM, VM_FF_EXTERNAL_HALTED_MASK)
392	\|\| VMCPU_FF_ISPENDING(pVCpu, fMask))
393	break;
394	uint64_t u64NanoTS = TMVirtualToNano(pVM, TMTimerPoll(pVM));
395	if ( VM_FF_ISPENDING(pVM, VM_FF_EXTERNAL_HALTED_MASK)
396	\|\| VMCPU_FF_ISPENDING(pVCpu, fMask))
397	break;
398
399	/*
400	* Wait for a while. Someone will wake us up or interrupt the call if
401	* anything needs our attention.
402	*/
403	if (u64NanoTS < 50000)
404	{
405	//RTLogPrintf("u64NanoTS=%RI64 cLoops=%d spin\n", u64NanoTS, cLoops++);
406	/* spin */;
407	}
408	else
409	{
410	VMMR3YieldStop(pVM);
411	//uint64_t u64Start = RTTimeNanoTS();
412	if (u64NanoTS < 870000) /* this is a bit speculative... works fine on linux. */
413	{
414	//RTLogPrintf("u64NanoTS=%RI64 cLoops=%d yield", u64NanoTS, cLoops++);
415	STAM_REL_PROFILE_START(&pUVCpu->vm.s.StatHaltYield, a);
416	RTThreadYield(); /* this is the best we can do here */
417	STAM_REL_PROFILE_STOP(&pUVCpu->vm.s.StatHaltYield, a);
418	}
419	else if (u64NanoTS < 2000000)
420	{
421	//RTLogPrintf("u64NanoTS=%RI64 cLoops=%d sleep 1ms", u64NanoTS, cLoops++);
422	STAM_REL_PROFILE_START(&pUVCpu->vm.s.StatHaltBlock, a);
423	rc = RTSemEventWait(pUVCpu->vm.s.EventSemWait, 1);
424	STAM_REL_PROFILE_STOP(&pUVCpu->vm.s.StatHaltBlock, a);
425	}
426	else
427	{
428	//RTLogPrintf("u64NanoTS=%RI64 cLoops=%d sleep %dms", u64NanoTS, cLoops++, (uint32_t)RT_MIN((u64NanoTS - 500000) / 1000000, 15));
429	STAM_REL_PROFILE_START(&pUVCpu->vm.s.StatHaltBlock, a);
430	rc = RTSemEventWait(pUVCpu->vm.s.EventSemWait, RT_MIN((u64NanoTS - 1000000) / 1000000, 15));
431	STAM_REL_PROFILE_STOP(&pUVCpu->vm.s.StatHaltBlock, a);
432	}
433	//uint64_t u64Slept = RTTimeNanoTS() - u64Start;
434	//RTLogPrintf(" -> rc=%Rrc in %RU64 ns / %RI64 ns delta\n", rc, u64Slept, u64NanoTS - u64Slept);
435	}
436	if (rc == VERR_TIMEOUT)
437	rc = VINF_SUCCESS;
438	else if (RT_FAILURE(rc))
439	{
440	AssertRC(rc != VERR_INTERRUPTED);
441	AssertMsgFailed(("RTSemEventWait->%Rrc\n", rc));
442	ASMAtomicUoWriteBool(&pUVCpu->vm.s.fTerminateEMT, true);
443	VM_FF_SET(pVM, VM_FF_TERMINATE);
444	rc = VERR_INTERNAL_ERROR;
445	break;
446	}
447	}
448
449	ASMAtomicUoWriteBool(&pUVCpu->vm.s.fWait, false);
450	return rc;
451	}
452
453
454	/**
455	* Initialize the configuration of halt method 1 & 2.
456	*
457	* @return VBox status code. Failure on invalid CFGM data.
458	* @param pVM The VM handle.
459	*/
460	static int vmR3HaltMethod12ReadConfigU(PUVM pUVM)
461	{
462	/*
463	* The defaults.
464	*/
465	#if 1 /* DEBUGGING STUFF - REMOVE LATER */
466	pUVM->vm.s.Halt.Method12.u32LagBlockIntervalDivisorCfg = 4;
467	pUVM->vm.s.Halt.Method12.u32MinBlockIntervalCfg = 2*1000000;
468	pUVM->vm.s.Halt.Method12.u32MaxBlockIntervalCfg = 75*1000000;
469	pUVM->vm.s.Halt.Method12.u32StartSpinningCfg = 30*1000000;
470	pUVM->vm.s.Halt.Method12.u32StopSpinningCfg = 20*1000000;
471	#else
472	pUVM->vm.s.Halt.Method12.u32LagBlockIntervalDivisorCfg = 4;
473	pUVM->vm.s.Halt.Method12.u32MinBlockIntervalCfg = 5*1000000;
474	pUVM->vm.s.Halt.Method12.u32MaxBlockIntervalCfg = 200*1000000;
475	pUVM->vm.s.Halt.Method12.u32StartSpinningCfg = 20*1000000;
476	pUVM->vm.s.Halt.Method12.u32StopSpinningCfg = 2*1000000;
477	#endif
478
479	/*
480	* Query overrides.
481	*
482	* I don't have time to bother with niceities such as invalid value checks
483	* here right now. sorry.
484	*/
485	PCFGMNODE pCfg = CFGMR3GetChild(CFGMR3GetRoot(pUVM->pVM), "/VMM/HaltedMethod1");
486	if (pCfg)
487	{
488	uint32_t u32;
489	if (RT_SUCCESS(CFGMR3QueryU32(pCfg, "LagBlockIntervalDivisor", &u32)))
490	pUVM->vm.s.Halt.Method12.u32LagBlockIntervalDivisorCfg = u32;
491	if (RT_SUCCESS(CFGMR3QueryU32(pCfg, "MinBlockInterval", &u32)))
492	pUVM->vm.s.Halt.Method12.u32MinBlockIntervalCfg = u32;
493	if (RT_SUCCESS(CFGMR3QueryU32(pCfg, "MaxBlockInterval", &u32)))
494	pUVM->vm.s.Halt.Method12.u32MaxBlockIntervalCfg = u32;
495	if (RT_SUCCESS(CFGMR3QueryU32(pCfg, "StartSpinning", &u32)))
496	pUVM->vm.s.Halt.Method12.u32StartSpinningCfg = u32;
497	if (RT_SUCCESS(CFGMR3QueryU32(pCfg, "StopSpinning", &u32)))
498	pUVM->vm.s.Halt.Method12.u32StopSpinningCfg = u32;
499	LogRel(("HaltedMethod1 config: %d/%d/%d/%d/%d\n",
500	pUVM->vm.s.Halt.Method12.u32LagBlockIntervalDivisorCfg,
501	pUVM->vm.s.Halt.Method12.u32MinBlockIntervalCfg,
502	pUVM->vm.s.Halt.Method12.u32MaxBlockIntervalCfg,
503	pUVM->vm.s.Halt.Method12.u32StartSpinningCfg,
504	pUVM->vm.s.Halt.Method12.u32StopSpinningCfg));
505	}
506
507	return VINF_SUCCESS;
508	}
509
510
511	/**
512	* Initialize halt method 1.
513	*
514	* @return VBox status code.
515	* @param pUVM Pointer to the user mode VM structure.
516	*/
517	static DECLCALLBACK(int) vmR3HaltMethod1Init(PUVM pUVM)
518	{
519	return vmR3HaltMethod12ReadConfigU(pUVM);
520	}
521
522
523	/**
524	* Method 1 - Block whenever possible, and when lagging behind
525	* switch to spinning for 10-30ms with occational blocking until
526	* the lag has been eliminated.
527	*/
528	static DECLCALLBACK(int) vmR3HaltMethod1Halt(PUVMCPU pUVCpu, const uint32_t fMask, uint64_t u64Now)
529	{
530	PUVM pUVM = pUVCpu->pUVM;
531	PVMCPU pVCpu = pUVCpu->pVCpu;
532	PVM pVM = pUVCpu->pVM;
533
534	/*
535	* To simplify things, we decide up-front whether we should switch to spinning or
536	* not. This makes some ASSUMPTIONS about the cause of the spinning (PIT/RTC/PCNet)
537	* and that it will generate interrupts or other events that will cause us to exit
538	* the halt loop.
539	*/
540	bool fBlockOnce = false;
541	bool fSpinning = false;
542	uint32_t u32CatchUpPct = TMVirtualSyncGetCatchUpPct(pVM);
543	if (u32CatchUpPct /* non-zero if catching up */)
544	{
545	if (pUVCpu->vm.s.Halt.Method12.u64StartSpinTS)
546	{
547	fSpinning = TMVirtualSyncGetLag(pVM) >= pUVM->vm.s.Halt.Method12.u32StopSpinningCfg;
548	if (fSpinning)
549	{
550	uint64_t u64Lag = TMVirtualSyncGetLag(pVM);
551	fBlockOnce = u64Now - pUVCpu->vm.s.Halt.Method12.u64LastBlockTS
552	> RT_MAX(pUVM->vm.s.Halt.Method12.u32MinBlockIntervalCfg,
553	RT_MIN(u64Lag / pUVM->vm.s.Halt.Method12.u32LagBlockIntervalDivisorCfg,
554	pUVM->vm.s.Halt.Method12.u32MaxBlockIntervalCfg));
555	}
556	else
557	{
558	//RTLogRelPrintf("Stopped spinning (%u ms)\n", (u64Now - pUVCpu->vm.s.Halt.Method12.u64StartSpinTS) / 1000000);
559	pUVCpu->vm.s.Halt.Method12.u64StartSpinTS = 0;
560	}
561	}
562	else
563	{
564	fSpinning = TMVirtualSyncGetLag(pVM) >= pUVM->vm.s.Halt.Method12.u32StartSpinningCfg;
565	if (fSpinning)
566	pUVCpu->vm.s.Halt.Method12.u64StartSpinTS = u64Now;
567	}
568	}
569	else if (pUVCpu->vm.s.Halt.Method12.u64StartSpinTS)
570	{
571	//RTLogRelPrintf("Stopped spinning (%u ms)\n", (u64Now - pUVCpu->vm.s.Halt.Method12.u64StartSpinTS) / 1000000);
572	pUVCpu->vm.s.Halt.Method12.u64StartSpinTS = 0;
573	}
574
575	/*
576	* Halt loop.
577	*/
578	int rc = VINF_SUCCESS;
579	ASMAtomicWriteBool(&pUVCpu->vm.s.fWait, true);
580	unsigned cLoops = 0;
581	for (;; cLoops++)
582	{
583	/*
584	* Work the timers and check if we can exit.
585	*/
586	STAM_REL_PROFILE_START(&pUVCpu->vm.s.StatHaltTimers, b);
587	TMR3TimerQueuesDo(pVM);
588	STAM_REL_PROFILE_STOP(&pUVCpu->vm.s.StatHaltTimers, b);
589	if ( VM_FF_ISPENDING(pVM, VM_FF_EXTERNAL_HALTED_MASK)
590	\|\| VMCPU_FF_ISPENDING(pVCpu, fMask))
591	break;
592
593	/*
594	* Estimate time left to the next event.
595	*/
596	uint64_t u64NanoTS = TMVirtualToNano(pVM, TMTimerPoll(pVM));
597	if ( VM_FF_ISPENDING(pVM, VM_FF_EXTERNAL_HALTED_MASK)
598	\|\| VMCPU_FF_ISPENDING(pVCpu, fMask))
599	break;
600
601	/*
602	* Block if we're not spinning and the interval isn't all that small.
603	*/
604	if ( ( !fSpinning
605	\|\| fBlockOnce)
606	#if 1 /* DEBUGGING STUFF - REMOVE LATER */
607	&& u64NanoTS >= 100000) /* 0.100 ms */
608	#else
609	&& u64NanoTS >= 250000) /* 0.250 ms */
610	#endif
611	{
612	const uint64_t Start = pUVCpu->vm.s.Halt.Method12.u64LastBlockTS = RTTimeNanoTS();
613	VMMR3YieldStop(pVM);
614
615	uint32_t cMilliSecs = RT_MIN(u64NanoTS / 1000000, 15);
616	if (cMilliSecs <= pUVCpu->vm.s.Halt.Method12.cNSBlockedTooLongAvg)
617	cMilliSecs = 1;
618	else
619	cMilliSecs -= pUVCpu->vm.s.Halt.Method12.cNSBlockedTooLongAvg;
620	//RTLogRelPrintf("u64NanoTS=%RI64 cLoops=%3d sleep %02dms (%7RU64) ", u64NanoTS, cLoops, cMilliSecs, u64NanoTS);
621	STAM_REL_PROFILE_START(&pUVCpu->vm.s.StatHaltBlock, a);
622	rc = RTSemEventWait(pUVCpu->vm.s.EventSemWait, cMilliSecs);
623	STAM_REL_PROFILE_STOP(&pUVCpu->vm.s.StatHaltBlock, a);
624	if (rc == VERR_TIMEOUT)
625	rc = VINF_SUCCESS;
626	else if (RT_FAILURE(rc))
627	{
628	AssertRC(rc != VERR_INTERRUPTED);
629	AssertMsgFailed(("RTSemEventWait->%Rrc\n", rc));
630	ASMAtomicUoWriteBool(&pUVCpu->vm.s.fTerminateEMT, true);
631	VM_FF_SET(pVM, VM_FF_TERMINATE);
632	rc = VERR_INTERNAL_ERROR;
633	break;
634	}
635
636	/*
637	* Calc the statistics.
638	* Update averages every 16th time, and flush parts of the history every 64th time.
639	*/
640	const uint64_t Elapsed = RTTimeNanoTS() - Start;
641	pUVCpu->vm.s.Halt.Method12.cNSBlocked += Elapsed;
642	if (Elapsed > u64NanoTS)
643	pUVCpu->vm.s.Halt.Method12.cNSBlockedTooLong += Elapsed - u64NanoTS;
644	pUVCpu->vm.s.Halt.Method12.cBlocks++;
645	if (!(pUVCpu->vm.s.Halt.Method12.cBlocks & 0xf))
646	{
647	pUVCpu->vm.s.Halt.Method12.cNSBlockedTooLongAvg = pUVCpu->vm.s.Halt.Method12.cNSBlockedTooLong / pUVCpu->vm.s.Halt.Method12.cBlocks;
648	if (!(pUVCpu->vm.s.Halt.Method12.cBlocks & 0x3f))
649	{
650	pUVCpu->vm.s.Halt.Method12.cNSBlockedTooLong = pUVCpu->vm.s.Halt.Method12.cNSBlockedTooLongAvg * 0x40;
651	pUVCpu->vm.s.Halt.Method12.cBlocks = 0x40;
652	}
653	}
654	//RTLogRelPrintf(" -> %7RU64 ns / %7RI64 ns delta%s\n", Elapsed, Elapsed - u64NanoTS, fBlockOnce ? " (block once)" : "");
655
656	/*
657	* Clear the block once flag if we actually blocked.
658	*/
659	if ( fBlockOnce
660	&& Elapsed > 100000 /* 0.1 ms */)
661	fBlockOnce = false;
662	}
663	}
664	//if (fSpinning) RTLogRelPrintf("spun for %RU64 ns %u loops; lag=%RU64 pct=%d\n", RTTimeNanoTS() - u64Now, cLoops, TMVirtualSyncGetLag(pVM), u32CatchUpPct);
665
666	ASMAtomicUoWriteBool(&pUVCpu->vm.s.fWait, false);
667	return rc;
668	}
669
670
671	/**
672	* Initialize the global 1 halt method.
673	*
674	* @return VBox status code.
675	* @param pUVM Pointer to the user mode VM structure.
676	*/
677	static DECLCALLBACK(int) vmR3HaltGlobal1Init(PUVM pUVM)
678	{
679	return VINF_SUCCESS;
680	}
681
682
683	/**
684	* The global 1 halt method - Block in GMM (ring-0) and let it
685	* try take care of the global scheduling of EMT threads.
686	*/
687	static DECLCALLBACK(int) vmR3HaltGlobal1Halt(PUVMCPU pUVCpu, const uint32_t fMask, uint64_t u64Now)
688	{
689	PUVM pUVM = pUVCpu->pUVM;
690	PVMCPU pVCpu = pUVCpu->pVCpu;
691	PVM pVM = pUVCpu->pVM;
692
693	/*
694	* Halt loop.
695	*/
696	int rc = VINF_SUCCESS;
697	ASMAtomicWriteBool(&pUVCpu->vm.s.fWait, true);
698	unsigned cLoops = 0;
699	for (;; cLoops++)
700	{
701	/*
702	* Work the timers and check if we can exit.
703	*/
704	STAM_REL_PROFILE_START(&pUVCpu->vm.s.StatHaltTimers, b);
705	TMR3TimerQueuesDo(pVM);
706	STAM_REL_PROFILE_STOP(&pUVCpu->vm.s.StatHaltTimers, b);
707	if ( VM_FF_ISPENDING(pVM, VM_FF_EXTERNAL_HALTED_MASK)
708	\|\| VMCPU_FF_ISPENDING(pVCpu, fMask))
709	break;
710
711	/*
712	* Estimate time left to the next event.
713	*/
714	uint64_t u64Delta;
715	uint64_t u64GipTime = TMTimerPollGIP(pVM, &u64Delta);
716	if ( VM_FF_ISPENDING(pVM, VM_FF_EXTERNAL_HALTED_MASK)
717	\|\| VMCPU_FF_ISPENDING(pVCpu, fMask))
718	break;
719
720	/*
721	* Block if we're not spinning and the interval isn't all that small.
722	*/
723	if (u64Delta > 50000 /* 0.050ms */)
724	{
725	VMMR3YieldStop(pVM);
726	if ( VM_FF_ISPENDING(pVM, VM_FF_EXTERNAL_HALTED_MASK)
727	\|\| VMCPU_FF_ISPENDING(pVCpu, fMask))
728	break;
729
730	//RTLogRelPrintf("u64NanoTS=%RI64 cLoops=%3d sleep %02dms (%7RU64) ", u64NanoTS, cLoops, cMilliSecs, u64NanoTS);
731	STAM_REL_PROFILE_START(&pUVCpu->vm.s.StatHaltBlock, c);
732	rc = SUPCallVMMR0Ex(pVM->pVMR0, VMMR0_DO_GVMM_SCHED_HALT, u64GipTime, NULL);
733	STAM_REL_PROFILE_STOP(&pUVCpu->vm.s.StatHaltBlock, c);
734	if (rc == VERR_INTERRUPTED)
735	rc = VINF_SUCCESS;
736	else if (RT_FAILURE(rc))
737	{
738	AssertMsgFailed(("VMMR0_DO_GVMM_SCHED_HALT->%Rrc\n", rc));
739	ASMAtomicUoWriteBool(&pUVCpu->vm.s.fTerminateEMT, true);
740	VM_FF_SET(pVM, VM_FF_TERMINATE);
741	rc = VERR_INTERNAL_ERROR;
742	break;
743	}
744	}
745	/*
746	* When spinning call upon the GVMM and do some wakups once
747	* in a while, it's not like we're actually busy or anything.
748	*/
749	else if (!(cLoops & 0x1fff))
750	{
751	STAM_REL_PROFILE_START(&pUVCpu->vm.s.StatHaltYield, d);
752	rc = SUPCallVMMR0Ex(pVM->pVMR0, VMMR0_DO_GVMM_SCHED_POLL, false /* don't yield */, NULL);
753	STAM_REL_PROFILE_STOP(&pUVCpu->vm.s.StatHaltYield, d);
754	}
755	}
756	//if (fSpinning) RTLogRelPrintf("spun for %RU64 ns %u loops; lag=%RU64 pct=%d\n", RTTimeNanoTS() - u64Now, cLoops, TMVirtualSyncGetLag(pVM), u32CatchUpPct);
757
758	ASMAtomicUoWriteBool(&pUVCpu->vm.s.fWait, false);
759	return rc;
760	}
761
762
763	/**
764	* The global 1 halt method - VMR3Wait() worker.
765	*
766	* @returns VBox status code.
767	* @param pUVCpu Pointer to the user mode VMCPU structure.
768	*/
769	static DECLCALLBACK(int) vmR3HaltGlobal1Wait(PUVMCPU pUVCpu)
770	{
771	ASMAtomicWriteBool(&pUVCpu->vm.s.fWait, true);
772
773	PVM pVM = pUVCpu->pUVM->pVM;
774	PVMCPU pVCpu = VMMGetCpu(pVM);
775
776	int rc = VINF_SUCCESS;
777	for (;;)
778	{
779	/*
780	* Check Relevant FFs.
781	*/
782	if ( VM_FF_ISPENDING(pVM, VM_FF_EXTERNAL_SUSPENDED_MASK)
783	\|\| VMCPU_FF_ISPENDING(pVCpu, VMCPU_FF_EXTERNAL_SUSPENDED_MASK))
784	break;
785
786	/*
787	* Wait for a while. Someone will wake us up or interrupt the call if
788	* anything needs our attention.
789	*/
790	rc = SUPCallVMMR0Ex(pVM->pVMR0, VMMR0_DO_GVMM_SCHED_HALT, RTTimeNanoTS() + 1000000000 /* +1s */, NULL);
791	if (rc == VERR_INTERRUPTED)
792	rc = VINF_SUCCESS;
793	else if (RT_FAILURE(rc))
794	{
795	AssertMsgFailed(("RTSemEventWait->%Rrc\n", rc));
796	ASMAtomicUoWriteBool(&pUVCpu->vm.s.fTerminateEMT, true);
797	VM_FF_SET(pVM, VM_FF_TERMINATE);
798	rc = VERR_INTERNAL_ERROR;
799	break;
800	}
801
802	}
803
804	ASMAtomicUoWriteBool(&pUVCpu->vm.s.fWait, false);
805	return rc;
806	}
807
808
809	/**
810	* The global 1 halt method - VMR3NotifyFF() worker.
811	*
812	* @param pUVCpu Pointer to the user mode VMCPU structure.
813	* @param fNotifiedREM See VMR3NotifyFF().
814	*/
815	static DECLCALLBACK(void) vmR3HaltGlobal1NotifyFF(PUVMCPU pUVCpu, bool fNotifiedREM)
816	{
817	if (pUVCpu->vm.s.fWait)
818	{
819	int rc = SUPCallVMMR0Ex(pUVCpu->pVM->pVMR0, VMMR0_DO_GVMM_SCHED_WAKE_UP, 0, NULL);
820	AssertRC(rc);
821	}
822	else if (!fNotifiedREM)
823	REMR3NotifyFF(pUVCpu->pVM);
824	}
825
826
827	/**
828	* Bootstrap VMR3Wait() worker.
829	*
830	* @returns VBox status code.
831	* @param pUVMCPU Pointer to the user mode VMCPU structure.
832	*/
833	static DECLCALLBACK(int) vmR3BootstrapWait(PUVMCPU pUVCpu)
834	{
835	PUVM pUVM = pUVCpu->pUVM;
836
837	ASMAtomicWriteBool(&pUVCpu->vm.s.fWait, true);
838
839	int rc = VINF_SUCCESS;
840	for (;;)
841	{
842	/*
843	* Check Relevant FFs.
844	*/
845	if (pUVM->vm.s.pReqs) /* global requests pending? */
846	break;
847	if (pUVCpu->vm.s.pReqs) /* local requests pending? */
848	break;
849
850	if ( pUVCpu->pVM
851	&& ( VM_FF_ISPENDING(pUVCpu->pVM, VM_FF_EXTERNAL_SUSPENDED_MASK)
852	\|\| VMCPU_FF_ISPENDING(VMMGetCpu(pUVCpu->pVM), VMCPU_FF_EXTERNAL_SUSPENDED_MASK)
853	)
854	)
855	break;
856	if (pUVCpu->vm.s.fTerminateEMT)
857	break;
858
859	/*
860	* Wait for a while. Someone will wake us up or interrupt the call if
861	* anything needs our attention.
862	*/
863	rc = RTSemEventWait(pUVCpu->vm.s.EventSemWait, 1000);
864	if (rc == VERR_TIMEOUT)
865	rc = VINF_SUCCESS;
866	else if (RT_FAILURE(rc))
867	{
868	AssertMsgFailed(("RTSemEventWait->%Rrc\n", rc));
869	ASMAtomicUoWriteBool(&pUVCpu->vm.s.fTerminateEMT, true);
870	if (pUVCpu->pVM)
871	VM_FF_SET(pUVCpu->pVM, VM_FF_TERMINATE);
872	rc = VERR_INTERNAL_ERROR;
873	break;
874	}
875
876	}
877
878	ASMAtomicUoWriteBool(&pUVCpu->vm.s.fWait, false);
879	return rc;
880	}
881
882
883	/**
884	* Bootstrap VMR3NotifyFF() worker.
885	*
886	* @param pUVCpu Pointer to the user mode VMCPU structure.
887	* @param fNotifiedREM See VMR3NotifyFF().
888	*/
889	static DECLCALLBACK(void) vmR3BootstrapNotifyFF(PUVMCPU pUVCpu, bool fNotifiedREM)
890	{
891	if (pUVCpu->vm.s.fWait)
892	{
893	int rc = RTSemEventSignal(pUVCpu->vm.s.EventSemWait);
894	AssertRC(rc);
895	}
896	}
897
898
899	/**
900	* Default VMR3Wait() worker.
901	*
902	* @returns VBox status code.
903	* @param pUVMCPU Pointer to the user mode VMCPU structure.
904	*/
905	static DECLCALLBACK(int) vmR3DefaultWait(PUVMCPU pUVCpu)
906	{
907	ASMAtomicWriteBool(&pUVCpu->vm.s.fWait, true);
908
909	PVM pVM = pUVCpu->pVM;
910	PVMCPU pVCpu = pUVCpu->pVCpu;
911	int rc = VINF_SUCCESS;
912	for (;;)
913	{
914	/*
915	* Check Relevant FFs.
916	*/
917	if ( VM_FF_ISPENDING(pVM, VM_FF_EXTERNAL_SUSPENDED_MASK)
918	\|\| VMCPU_FF_ISPENDING(pVCpu, VMCPU_FF_EXTERNAL_SUSPENDED_MASK))
919	break;
920
921	/*
922	* Wait for a while. Someone will wake us up or interrupt the call if
923	* anything needs our attention.
924	*/
925	rc = RTSemEventWait(pUVCpu->vm.s.EventSemWait, 1000);
926	if (rc == VERR_TIMEOUT)
927	rc = VINF_SUCCESS;
928	else if (RT_FAILURE(rc))
929	{
930	AssertMsgFailed(("RTSemEventWait->%Rrc\n", rc));
931	ASMAtomicUoWriteBool(&pUVCpu->vm.s.fTerminateEMT, true);
932	VM_FF_SET(pVM, VM_FF_TERMINATE);
933	rc = VERR_INTERNAL_ERROR;
934	break;
935	}
936
937	}
938
939	ASMAtomicUoWriteBool(&pUVCpu->vm.s.fWait, false);
940	return rc;
941	}
942
943
944	/**
945	* Default VMR3NotifyFF() worker.
946	*
947	* @param pUVCpu Pointer to the user mode VMCPU structure.
948	* @param fNotifiedREM See VMR3NotifyFF().
949	*/
950	static DECLCALLBACK(void) vmR3DefaultNotifyFF(PUVMCPU pUVCpu, bool fNotifiedREM)
951	{
952	if (pUVCpu->vm.s.fWait)
953	{
954	int rc = RTSemEventSignal(pUVCpu->vm.s.EventSemWait);
955	AssertRC(rc);
956	}
957	else if (!fNotifiedREM)
958	REMR3NotifyFF(pUVCpu->pVM);
959	}
960
961
962	/**
963	* Array with halt method descriptors.
964	* VMINT::iHaltMethod contains an index into this array.
965	*/
966	static const struct VMHALTMETHODDESC
967	{
968	/** The halt method id. */
969	VMHALTMETHOD enmHaltMethod;
970	/** The init function for loading config and initialize variables. */
971	DECLR3CALLBACKMEMBER(int, pfnInit,(PUVM pUVM));
972	/** The term function. */
973	DECLR3CALLBACKMEMBER(void, pfnTerm,(PUVM pUVM));
974	/** The halt function. */
975	DECLR3CALLBACKMEMBER(int, pfnHalt,(PUVMCPU pUVCpu, const uint32_t fMask, uint64_t u64Now));
976	/** The wait function. */
977	DECLR3CALLBACKMEMBER(int, pfnWait,(PUVMCPU pUVCpu));
978	/** The notifyFF function. */
979	DECLR3CALLBACKMEMBER(void, pfnNotifyFF,(PUVMCPU pUVCpu, bool fNotifiedREM));
980	} g_aHaltMethods[] =
981	{
982	{ VMHALTMETHOD_BOOTSTRAP, NULL, NULL, NULL, vmR3BootstrapWait, vmR3BootstrapNotifyFF },
983	{ VMHALTMETHOD_OLD, NULL, NULL, vmR3HaltOldDoHalt, vmR3DefaultWait, vmR3DefaultNotifyFF },
984	{ VMHALTMETHOD_1, vmR3HaltMethod1Init, NULL, vmR3HaltMethod1Halt, vmR3DefaultWait, vmR3DefaultNotifyFF },
985	{ VMHALTMETHOD_GLOBAL_1,vmR3HaltGlobal1Init, NULL, vmR3HaltGlobal1Halt, vmR3HaltGlobal1Wait, vmR3HaltGlobal1NotifyFF },
986	};
987
988
989	/**
990	* Notify the emulation thread (EMT) about pending Forced Action (FF).
991	*
992	* This function is called by thread other than EMT to make
993	* sure EMT wakes up and promptly service an FF request.
994	*
995	* @param pVM VM handle.
996	* @param pVCpu VMCPU handle (NULL if all/global notification)
997	* @param fNotifiedREM Set if REM have already been notified. If clear the
998	* generic REMR3NotifyFF() method is called.
999	*/
1000	VMMR3DECL(void) VMR3NotifyGlobalFF(PVM pVM, bool fNotifiedREM)
1001	{
1002	PUVM pUVM = pVM->pUVM;
1003
1004	LogFlow(("VMR3NotifyFF:\n"));
1005	/** @todo might want to have a 2nd look at this (SMP) */
1006	for (unsigned iCpu=0;iCpu<pVM->cCPUs;iCpu++)
1007	{
1008	PUVMCPU pUVCpu = pVM->aCpus[iCpu].pUVCpu;
1009	g_aHaltMethods[pUVM->vm.s.iHaltMethod].pfnNotifyFF(pUVCpu, fNotifiedREM);
1010	}
1011	}
1012
1013	/**
1014	* Notify the emulation thread (EMT) about pending Forced Action (FF).
1015	*
1016	* This function is called by thread other than EMT to make
1017	* sure EMT wakes up and promptly service an FF request.
1018	*
1019	* @param pVM VM handle.
1020	* @param pVCpu VMCPU handle (NULL if all/global notification)
1021	* @param fNotifiedREM Set if REM have already been notified. If clear the
1022	* generic REMR3NotifyFF() method is called.
1023	*/
1024	VMMR3DECL(void) VMR3NotifyCpuFF(PVMCPU pVCpu, bool fNotifiedREM)
1025	{
1026	PUVMCPU pUVCpu = pVCpu->pUVCpu;
1027	PUVM pUVM = pUVCpu->pUVM;
1028
1029	LogFlow(("VMR3NotifyCpuFF:\n"));
1030	g_aHaltMethods[pUVM->vm.s.iHaltMethod].pfnNotifyFF(pUVCpu, fNotifiedREM);
1031	}
1032
1033
1034	/**
1035	* Notify the emulation thread (EMT) about pending Forced Action (FF).
1036	*
1037	* This function is called by thread other than EMT to make
1038	* sure EMT wakes up and promptly service an FF request.
1039	*
1040	* @param pUVM Pointer to the user mode VM structure.
1041	* @param fNotifiedREM Set if REM have already been notified. If clear the
1042	* generic REMR3NotifyFF() method is called.
1043	*/
1044	VMMR3DECL(void) VMR3NotifyGlobalFFU(PUVM pUVM, bool fNotifiedREM)
1045	{
1046	LogFlow(("VMR3NotifyGlobalFFU:\n"));
1047	/** @todo might want to have a 2nd look at this (SMP) */
1048	for (unsigned iCpu=0;iCpu<pUVM->cCpus;iCpu++)
1049	{
1050	PUVMCPU pUVCpu = &pUVM->aCpus[iCpu];
1051	g_aHaltMethods[pUVM->vm.s.iHaltMethod].pfnNotifyFF(pUVCpu, fNotifiedREM);
1052	}
1053	}
1054
1055	/**
1056	* Notify the emulation thread (EMT) about pending Forced Action (FF).
1057	*
1058	* This function is called by thread other than EMT to make
1059	* sure EMT wakes up and promptly service an FF request.
1060	*
1061	* @param pUVM Pointer to the user mode VM structure.
1062	* @param fNotifiedREM Set if REM have already been notified. If clear the
1063	* generic REMR3NotifyFF() method is called.
1064	*/
1065	VMMR3DECL(void) VMR3NotifyCpuFFU(PUVMCPU pUVCpu, bool fNotifiedREM)
1066	{
1067	PUVM pUVM = pUVCpu->pUVM;
1068
1069	LogFlow(("VMR3NotifyCpuFFU:\n"));
1070	g_aHaltMethods[pUVM->vm.s.iHaltMethod].pfnNotifyFF(pUVCpu, fNotifiedREM);
1071	}
1072
1073
1074	/**
1075	* Halted VM Wait.
1076	* Any external event will unblock the thread.
1077	*
1078	* @returns VINF_SUCCESS unless a fatal error occured. In the latter
1079	* case an appropriate status code is returned.
1080	* @param pVM VM handle.
1081	* @param pVCpu VMCPU handle.
1082	* @param fIgnoreInterrupts If set the VM_FF_INTERRUPT flags is ignored.
1083	* @thread The emulation thread.
1084	*/
1085	VMMR3DECL(int) VMR3WaitHalted(PVM pVM, PVMCPU pVCpu, bool fIgnoreInterrupts)
1086	{
1087	LogFlow(("VMR3WaitHalted: fIgnoreInterrupts=%d\n", fIgnoreInterrupts));
1088
1089	/*
1090	* Check Relevant FFs.
1091	*/
1092	const uint32_t fMask = !fIgnoreInterrupts
1093	? VMCPU_FF_EXTERNAL_HALTED_MASK
1094	: VMCPU_FF_EXTERNAL_HALTED_MASK & ~(VMCPU_FF_INTERRUPT_APIC \| VMCPU_FF_INTERRUPT_PIC);
1095	if ( VM_FF_ISPENDING(pVM, VM_FF_EXTERNAL_HALTED_MASK)
1096	\|\| VMCPU_FF_ISPENDING(pVCpu, fMask))
1097	{
1098	LogFlow(("VMR3WaitHalted: returns VINF_SUCCESS (FF %#x FFCPU %#x)\n", pVM->fGlobalForcedActions, pVCpu->fLocalForcedActions));
1099	return VINF_SUCCESS;
1100	}
1101
1102	/*
1103	* The yielder is suspended while we're halting, while TM might have clock(s) running
1104	* only at certain times and need to be notified..
1105	*/
1106	VMMR3YieldSuspend(pVM);
1107	TMNotifyStartOfHalt(pVCpu);
1108
1109	/*
1110	* Record halt averages for the last second.
1111	*/
1112	PUVMCPU pUVCpu = pVCpu->pUVCpu;
1113	uint64_t u64Now = RTTimeNanoTS();
1114	int64_t off = u64Now - pUVCpu->vm.s.u64HaltsStartTS;
1115	if (off > 1000000000)
1116	{
1117	if (off > _4G \|\| !pUVCpu->vm.s.cHalts)
1118	{
1119	pUVCpu->vm.s.HaltInterval = 1000000000 /* 1 sec */;
1120	pUVCpu->vm.s.HaltFrequency = 1;
1121	}
1122	else
1123	{
1124	pUVCpu->vm.s.HaltInterval = (uint32_t)off / pUVCpu->vm.s.cHalts;
1125	pUVCpu->vm.s.HaltFrequency = ASMMultU64ByU32DivByU32(pUVCpu->vm.s.cHalts, 1000000000, (uint32_t)off);
1126	}
1127	pUVCpu->vm.s.u64HaltsStartTS = u64Now;
1128	pUVCpu->vm.s.cHalts = 0;
1129	}
1130	pUVCpu->vm.s.cHalts++;
1131
1132	/*
1133	* Do the halt.
1134	*/
1135	PUVM pUVM = pUVCpu->pUVM;
1136	int rc = g_aHaltMethods[pUVM->vm.s.iHaltMethod].pfnHalt(pUVCpu, fMask, u64Now);
1137
1138	/*
1139	* Notify TM and resume the yielder
1140	*/
1141	TMNotifyEndOfHalt(pVCpu);
1142	VMMR3YieldResume(pVM);
1143
1144	LogFlow(("VMR3WaitHalted: returns %Rrc (FF %#x)\n", rc, pVM->fGlobalForcedActions));
1145	return rc;
1146	}
1147
1148
1149	/**
1150	* Suspended VM Wait.
1151	* Only a handful of forced actions will cause the function to
1152	* return to the caller.
1153	*
1154	* @returns VINF_SUCCESS unless a fatal error occured. In the latter
1155	* case an appropriate status code is returned.
1156	* @param pUVCpu Pointer to the user mode VMCPU structure.
1157	* @thread The emulation thread.
1158	*/
1159	VMMR3DECL(int) VMR3WaitU(PUVMCPU pUVCpu)
1160	{
1161	LogFlow(("VMR3WaitU:\n"));
1162
1163	/*
1164	* Check Relevant FFs.
1165	*/
1166	PVM pVM = pUVCpu->pVM;
1167	PVMCPU pVCpu = pUVCpu->pVCpu;
1168
1169	if ( pVM
1170	&& ( VM_FF_ISPENDING(pVM, VM_FF_EXTERNAL_SUSPENDED_MASK)
1171	\|\| VMCPU_FF_ISPENDING(pVCpu, VMCPU_FF_EXTERNAL_SUSPENDED_MASK)
1172	)
1173	)
1174	{
1175	LogFlow(("VMR3Wait: returns VINF_SUCCESS (FF %#x)\n", pVM->fGlobalForcedActions));
1176	return VINF_SUCCESS;
1177	}
1178
1179	/*
1180	* Do waiting according to the halt method (so VMR3NotifyFF
1181	* doesn't have to special case anything).
1182	*/
1183	PUVM pUVM = pUVCpu->pUVM;
1184	int rc = g_aHaltMethods[pUVM->vm.s.iHaltMethod].pfnWait(pUVCpu);
1185	LogFlow(("VMR3WaitU: returns %Rrc (FF %#x)\n", rc, pVM ? pVM->fGlobalForcedActions : 0));
1186	return rc;
1187	}
1188
1189
1190	/**
1191	* Changes the halt method.
1192	*
1193	* @returns VBox status code.
1194	* @param pUVM Pointer to the user mode VM structure.
1195	* @param enmHaltMethod The new halt method.
1196	* @thread EMT.
1197	*/
1198	int vmR3SetHaltMethodU(PUVM pUVM, VMHALTMETHOD enmHaltMethod)
1199	{
1200	PVM pVM = pUVM->pVM; Assert(pVM);
1201	VM_ASSERT_EMT(pVM);
1202	AssertReturn(enmHaltMethod > VMHALTMETHOD_INVALID && enmHaltMethod < VMHALTMETHOD_END, VERR_INVALID_PARAMETER);
1203
1204	/*
1205	* Resolve default (can be overridden in the configuration).
1206	*/
1207	if (enmHaltMethod == VMHALTMETHOD_DEFAULT)
1208	{
1209	uint32_t u32;
1210	int rc = CFGMR3QueryU32(CFGMR3GetChild(CFGMR3GetRoot(pVM), "VM"), "HaltMethod", &u32);
1211	if (RT_SUCCESS(rc))
1212	{
1213	enmHaltMethod = (VMHALTMETHOD)u32;
1214	if (enmHaltMethod <= VMHALTMETHOD_INVALID \|\| enmHaltMethod >= VMHALTMETHOD_END)
1215	return VMSetError(pVM, VERR_INVALID_PARAMETER, RT_SRC_POS, N_("Invalid VM/HaltMethod value %d"), enmHaltMethod);
1216	}
1217	else if (rc == VERR_CFGM_VALUE_NOT_FOUND \|\| rc == VERR_CFGM_CHILD_NOT_FOUND)
1218	return VMSetError(pVM, rc, RT_SRC_POS, N_("Failed to Query VM/HaltMethod as uint32_t"));
1219	else
1220	enmHaltMethod = VMHALTMETHOD_GLOBAL_1;
1221	//enmHaltMethod = VMHALTMETHOD_1;
1222	//enmHaltMethod = VMHALTMETHOD_OLD;
1223	}
1224	LogRel(("VM: Halt method %s (%d)\n", vmR3GetHaltMethodName(enmHaltMethod), enmHaltMethod));
1225
1226	/*
1227	* Find the descriptor.
1228	*/
1229	unsigned i = 0;
1230	while ( i < RT_ELEMENTS(g_aHaltMethods)
1231	&& g_aHaltMethods[i].enmHaltMethod != enmHaltMethod)
1232	i++;
1233	AssertReturn(i < RT_ELEMENTS(g_aHaltMethods), VERR_INVALID_PARAMETER);
1234
1235	/*
1236	* Terminate the old one.
1237	*/
1238	if ( pUVM->vm.s.enmHaltMethod != VMHALTMETHOD_INVALID
1239	&& g_aHaltMethods[pUVM->vm.s.iHaltMethod].pfnTerm)
1240	{
1241	g_aHaltMethods[pUVM->vm.s.iHaltMethod].pfnTerm(pUVM);
1242	pUVM->vm.s.enmHaltMethod = VMHALTMETHOD_INVALID;
1243	}
1244
1245	/*
1246	* Init the new one.
1247	*/
1248	memset(&pUVM->vm.s.Halt, 0, sizeof(pUVM->vm.s.Halt));
1249	if (g_aHaltMethods[i].pfnInit)
1250	{
1251	int rc = g_aHaltMethods[i].pfnInit(pUVM);
1252	AssertRCReturn(rc, rc);
1253	}
1254	pUVM->vm.s.enmHaltMethod = enmHaltMethod;
1255
1256	ASMAtomicWriteU32(&pUVM->vm.s.iHaltMethod, i);
1257	return VINF_SUCCESS;
1258	}
1259

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source: vbox/trunk/src/VBox/VMM/VMEmt.cpp@ 19217

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