EMHM.cpp@ 93609

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1	/* $Id: EMHM.cpp 93115 2022-01-01 11:31:46Z vboxsync $ */
2	/** @file
3	* EM - Execution Monitor / Manager - hardware virtualization
4	*/
5
6	/*
7	* Copyright (C) 2006-2022 Oracle Corporation
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.virtualbox.org. This file is free software;
11	* you can redistribute it and/or modify it under the terms of the GNU
12	* General Public License (GPL) as published by the Free Software
13	* Foundation, in version 2 as it comes in the "COPYING" file of the
14	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16	*/
17
18
19	/*********************************************************************************************************************************
20	* Header Files *
21	*********************************************************************************************************************************/
22	#define LOG_GROUP LOG_GROUP_EM
23	#define VMCPU_INCL_CPUM_GST_CTX
24	#include <VBox/vmm/em.h>
25	#include <VBox/vmm/vmm.h>
26	#include <VBox/vmm/selm.h>
27	#include <VBox/vmm/trpm.h>
28	#include <VBox/vmm/iem.h>
29	#include <VBox/vmm/iom.h>
30	#include <VBox/vmm/dbgf.h>
31	#include <VBox/vmm/pgm.h>
32	#include <VBox/vmm/tm.h>
33	#include <VBox/vmm/mm.h>
34	#include <VBox/vmm/ssm.h>
35	#include <VBox/vmm/pdmapi.h>
36	#include <VBox/vmm/pdmcritsect.h>
37	#include <VBox/vmm/pdmqueue.h>
38	#include <VBox/vmm/hm.h>
39	#include "EMInternal.h"
40	#include <VBox/vmm/vm.h>
41	#include <VBox/vmm/gim.h>
42	#include <VBox/vmm/cpumdis.h>
43	#include <VBox/dis.h>
44	#include <VBox/disopcode.h>
45	#include <VBox/err.h>
46	#include <VBox/vmm/dbgf.h>
47	#include "VMMTracing.h"
48
49	#include <iprt/asm.h>
50
51
52	/*********************************************************************************************************************************
53	* Internal Functions *
54	*********************************************************************************************************************************/
55	static int emR3HmHandleRC(PVM pVM, PVMCPU pVCpu, int rc);
56	DECLINLINE(int) emR3HmExecuteInstruction(PVM pVM, PVMCPU pVCpu, const char *pszPrefix, int rcGC = VINF_SUCCESS);
57	static int emR3HmExecuteIOInstruction(PVM pVM, PVMCPU pVCpu);
58	static int emR3HmForcedActions(PVM pVM, PVMCPU pVCpu);
59
60	#define EMHANDLERC_WITH_HM
61	#define emR3ExecuteInstruction emR3HmExecuteInstruction
62	#define emR3ExecuteIOInstruction emR3HmExecuteIOInstruction
63	#include "EMHandleRCTmpl.h"
64
65
66	/**
67	* Executes instruction in HM mode if we can.
68	*
69	* This is somewhat comparable to REMR3EmulateInstruction.
70	*
71	* @returns VBox strict status code.
72	* @retval VINF_EM_DBG_STEPPED on success.
73	* @retval VERR_EM_CANNOT_EXEC_GUEST if we cannot execute guest instructions in
74	* HM right now.
75	*
76	* @param pVM The cross context VM structure.
77	* @param pVCpu The cross context virtual CPU structure for the calling EMT.
78	* @param fFlags Combinations of EM_ONE_INS_FLAGS_XXX.
79	* @thread EMT.
80	*/
81	VMMR3_INT_DECL(VBOXSTRICTRC) EMR3HmSingleInstruction(PVM pVM, PVMCPU pVCpu, uint32_t fFlags)
82	{
83	Assert(!(fFlags & ~EM_ONE_INS_FLAGS_MASK));
84
85	if (!HMCanExecuteGuest(pVM, pVCpu, &pVCpu->cpum.GstCtx))
86	return VINF_EM_RESCHEDULE;
87
88	uint64_t const uOldRip = pVCpu->cpum.GstCtx.rip;
89	for (;;)
90	{
91	/*
92	* Service necessary FFs before going into HM.
93	*/
94	if ( VM_FF_IS_ANY_SET(pVM, VM_FF_HIGH_PRIORITY_PRE_RAW_MASK)
95	\|\| VMCPU_FF_IS_ANY_SET(pVCpu, VMCPU_FF_HIGH_PRIORITY_PRE_RAW_MASK))
96	{
97	VBOXSTRICTRC rcStrict = emR3HmForcedActions(pVM, pVCpu);
98	if (rcStrict != VINF_SUCCESS)
99	{
100	Log(("EMR3HmSingleInstruction: FFs before -> %Rrc\n", VBOXSTRICTRC_VAL(rcStrict)));
101	return rcStrict;
102	}
103	}
104
105	/*
106	* Go execute it.
107	*/
108	bool fOld = HMSetSingleInstruction(pVM, pVCpu, true);
109	VBOXSTRICTRC rcStrict = VMMR3HmRunGC(pVM, pVCpu);
110	HMSetSingleInstruction(pVM, pVCpu, fOld);
111	LogFlow(("EMR3HmSingleInstruction: %Rrc\n", VBOXSTRICTRC_VAL(rcStrict)));
112
113	/*
114	* Handle high priority FFs and informational status codes. We don't do
115	* normal FF processing the caller or the next call can deal with them.
116	*/
117	VMCPU_FF_CLEAR_MASK(pVCpu, VMCPU_FF_RESUME_GUEST_MASK);
118	if ( VM_FF_IS_ANY_SET(pVM, VM_FF_HIGH_PRIORITY_POST_MASK)
119	\|\| VMCPU_FF_IS_ANY_SET(pVCpu, VMCPU_FF_HIGH_PRIORITY_POST_MASK))
120	{
121	rcStrict = emR3HighPriorityPostForcedActions(pVM, pVCpu, rcStrict);
122	LogFlow(("EMR3HmSingleInstruction: FFs after -> %Rrc\n", VBOXSTRICTRC_VAL(rcStrict)));
123	}
124
125	if (rcStrict != VINF_SUCCESS && (rcStrict < VINF_EM_FIRST \|\| rcStrict > VINF_EM_LAST))
126	{
127	rcStrict = emR3HmHandleRC(pVM, pVCpu, VBOXSTRICTRC_TODO(rcStrict));
128	Log(("EMR3HmSingleInstruction: emR3HmHandleRC -> %Rrc\n", VBOXSTRICTRC_VAL(rcStrict)));
129	}
130
131	/*
132	* Done?
133	*/
134	if ( (rcStrict != VINF_SUCCESS && rcStrict != VINF_EM_DBG_STEPPED)
135	\|\| !(fFlags & EM_ONE_INS_FLAGS_RIP_CHANGE)
136	\|\| pVCpu->cpum.GstCtx.rip != uOldRip)
137	{
138	if (rcStrict == VINF_SUCCESS && pVCpu->cpum.GstCtx.rip != uOldRip)
139	rcStrict = VINF_EM_DBG_STEPPED;
140	Log(("EMR3HmSingleInstruction: returns %Rrc (rip %llx -> %llx)\n", VBOXSTRICTRC_VAL(rcStrict), uOldRip, pVCpu->cpum.GstCtx.rip));
141	CPUM_IMPORT_EXTRN_RET(pVCpu, ~CPUMCTX_EXTRN_KEEPER_MASK);
142	return rcStrict;
143	}
144	}
145	}
146
147
148	/**
149	* Executes one (or perhaps a few more) instruction(s).
150	*
151	* @returns VBox status code suitable for EM.
152	*
153	* @param pVM The cross context VM structure.
154	* @param pVCpu The cross context virtual CPU structure.
155	* @param rcRC Return code from RC.
156	* @param pszPrefix Disassembly prefix. If not NULL we'll disassemble the
157	* instruction and prefix the log output with this text.
158	*/
159	#if defined(LOG_ENABLED) \|\| defined(DOXYGEN_RUNNING)
160	static int emR3HmExecuteInstructionWorker(PVM pVM, PVMCPU pVCpu, int rcRC, const char *pszPrefix)
161	#else
162	static int emR3HmExecuteInstructionWorker(PVM pVM, PVMCPU pVCpu, int rcRC)
163	#endif
164	{
165	RT_NOREF(rcRC, pVM);
166
167	#ifdef LOG_ENABLED
168	/*
169	* Log it.
170	*/
171	Log(("EMINS: %04x:%RGv RSP=%RGv\n", pVCpu->cpum.GstCtx.cs.Sel, (RTGCPTR)pVCpu->cpum.GstCtx.rip, (RTGCPTR)pVCpu->cpum.GstCtx.rsp));
172	if (pszPrefix)
173	{
174	DBGFR3_INFO_LOG(pVM, pVCpu, "cpumguest", pszPrefix);
175	DBGFR3_DISAS_INSTR_CUR_LOG(pVCpu, pszPrefix);
176	}
177	#endif
178
179	/*
180	* Use IEM and fallback on REM if the functionality is missing.
181	* Once IEM gets mature enough, nothing should ever fall back.
182	*/
183	STAM_PROFILE_START(&pVCpu->em.s.StatIEMEmu, a);
184	VBOXSTRICTRC rcStrict;
185	uint32_t idxContinueExitRec = pVCpu->em.s.idxContinueExitRec;
186	RT_UNTRUSTED_NONVOLATILE_COPY_FENCE();
187	if (idxContinueExitRec >= RT_ELEMENTS(pVCpu->em.s.aExitRecords))
188	{
189	CPUM_IMPORT_EXTRN_RET(pVCpu, IEM_CPUMCTX_EXTRN_MUST_MASK);
190	rcStrict = VBOXSTRICTRC_TODO(IEMExecOne(pVCpu));
191	}
192	else
193	{
194	RT_UNTRUSTED_VALIDATED_FENCE();
195	rcStrict = EMHistoryExec(pVCpu, &pVCpu->em.s.aExitRecords[idxContinueExitRec], 0);
196	LogFlow(("emR3HmExecuteInstruction: %Rrc (EMHistoryExec)\n", VBOXSTRICTRC_VAL(rcStrict)));
197	}
198	STAM_PROFILE_STOP(&pVCpu->em.s.StatIEMEmu, a);
199
200	return VBOXSTRICTRC_TODO(rcStrict);
201	}
202
203
204	/**
205	* Executes one (or perhaps a few more) instruction(s).
206	* This is just a wrapper for discarding pszPrefix in non-logging builds.
207	*
208	* @returns VBox status code suitable for EM.
209	* @param pVM The cross context VM structure.
210	* @param pVCpu The cross context virtual CPU structure.
211	* @param pszPrefix Disassembly prefix. If not NULL we'll disassemble the
212	* instruction and prefix the log output with this text.
213	* @param rcGC GC return code
214	*/
215	DECLINLINE(int) emR3HmExecuteInstruction(PVM pVM, PVMCPU pVCpu, const char *pszPrefix, int rcGC)
216	{
217	#ifdef LOG_ENABLED
218	return emR3HmExecuteInstructionWorker(pVM, pVCpu, rcGC, pszPrefix);
219	#else
220	RT_NOREF_PV(pszPrefix);
221	return emR3HmExecuteInstructionWorker(pVM, pVCpu, rcGC);
222	#endif
223	}
224
225
226	/**
227	* Executes one (or perhaps a few more) IO instruction(s).
228	*
229	* @returns VBox status code suitable for EM.
230	* @param pVM The cross context VM structure.
231	* @param pVCpu The cross context virtual CPU structure.
232	*/
233	static int emR3HmExecuteIOInstruction(PVM pVM, PVMCPU pVCpu)
234	{
235	RT_NOREF(pVM);
236	STAM_PROFILE_START(&pVCpu->em.s.StatIOEmu, a);
237
238	VBOXSTRICTRC rcStrict;
239	uint32_t idxContinueExitRec = pVCpu->em.s.idxContinueExitRec;
240	RT_UNTRUSTED_NONVOLATILE_COPY_FENCE();
241	if (idxContinueExitRec >= RT_ELEMENTS(pVCpu->em.s.aExitRecords))
242	{
243	/*
244	* Hand it over to the interpreter.
245	*/
246	CPUM_IMPORT_EXTRN_RET(pVCpu, IEM_CPUMCTX_EXTRN_MUST_MASK);
247	rcStrict = IEMExecOne(pVCpu);
248	LogFlow(("emR3HmExecuteIOInstruction: %Rrc\n", VBOXSTRICTRC_VAL(rcStrict)));
249	}
250	else
251	{
252	RT_UNTRUSTED_VALIDATED_FENCE();
253	CPUM_IMPORT_EXTRN_RET(pVCpu, IEM_CPUMCTX_EXTRN_MUST_MASK);
254	rcStrict = EMHistoryExec(pVCpu, &pVCpu->em.s.aExitRecords[idxContinueExitRec], 0);
255	LogFlow(("emR3HmExecuteIOInstruction: %Rrc (EMHistoryExec)\n", VBOXSTRICTRC_VAL(rcStrict)));
256	STAM_COUNTER_INC(&pVCpu->em.s.StatIoRestarted);
257	}
258
259	STAM_COUNTER_INC(&pVCpu->em.s.StatIoIem);
260	STAM_PROFILE_STOP(&pVCpu->em.s.StatIOEmu, a);
261	return VBOXSTRICTRC_TODO(rcStrict);
262	}
263
264
265	/**
266	* Process HM specific forced actions.
267	*
268	* This function is called when any FFs in the VM_FF_HIGH_PRIORITY_PRE_RAW_MASK
269	* or/and VMCPU_FF_HIGH_PRIORITY_PRE_RAW_MASK are pending.
270	*
271	* @returns VBox status code. May return VINF_EM_NO_MEMORY but none of the other
272	* EM statuses.
273	* @param pVM The cross context VM structure.
274	* @param pVCpu The cross context virtual CPU structure.
275	*/
276	static int emR3HmForcedActions(PVM pVM, PVMCPU pVCpu)
277	{
278	/*
279	* Sync page directory.
280	*/
281	if (VMCPU_FF_IS_ANY_SET(pVCpu, VMCPU_FF_PGM_SYNC_CR3 \| VMCPU_FF_PGM_SYNC_CR3_NON_GLOBAL))
282	{
283	CPUM_IMPORT_EXTRN_RET(pVCpu, CPUMCTX_EXTRN_CR0 \| CPUMCTX_EXTRN_CR3 \| CPUMCTX_EXTRN_CR4);
284	Assert(pVCpu->em.s.enmState != EMSTATE_WAIT_SIPI);
285	int rc = PGMSyncCR3(pVCpu, pVCpu->cpum.GstCtx.cr0, pVCpu->cpum.GstCtx.cr3, pVCpu->cpum.GstCtx.cr4, VMCPU_FF_IS_SET(pVCpu, VMCPU_FF_PGM_SYNC_CR3));
286	if (RT_FAILURE(rc))
287	return rc;
288
289	/* Prefetch pages for EIP and ESP. */
290	/** @todo This is rather expensive. Should investigate if it really helps at all. */
291	/** @todo this should be skipped! */
292	CPUM_IMPORT_EXTRN_RET(pVCpu, CPUMCTX_EXTRN_CS \| CPUMCTX_EXTRN_SS);
293	rc = PGMPrefetchPage(pVCpu, SELMToFlat(pVM, DISSELREG_CS, CPUMCTX2CORE(&pVCpu->cpum.GstCtx), pVCpu->cpum.GstCtx.rip));
294	if (rc == VINF_SUCCESS)
295	rc = PGMPrefetchPage(pVCpu, SELMToFlat(pVM, DISSELREG_SS, CPUMCTX2CORE(&pVCpu->cpum.GstCtx), pVCpu->cpum.GstCtx.rsp));
296	if (rc != VINF_SUCCESS)
297	{
298	if (rc != VINF_PGM_SYNC_CR3)
299	{
300	AssertLogRelMsgReturn(RT_FAILURE(rc), ("%Rrc\n", rc), VERR_IPE_UNEXPECTED_INFO_STATUS);
301	return rc;
302	}
303	rc = PGMSyncCR3(pVCpu, pVCpu->cpum.GstCtx.cr0, pVCpu->cpum.GstCtx.cr3, pVCpu->cpum.GstCtx.cr4, VMCPU_FF_IS_SET(pVCpu, VMCPU_FF_PGM_SYNC_CR3));
304	if (RT_FAILURE(rc))
305	return rc;
306	}
307	/** @todo maybe prefetch the supervisor stack page as well */
308	}
309
310	/*
311	* Allocate handy pages (just in case the above actions have consumed some pages).
312	*/
313	if (VM_FF_IS_PENDING_EXCEPT(pVM, VM_FF_PGM_NEED_HANDY_PAGES, VM_FF_PGM_NO_MEMORY))
314	{
315	int rc = PGMR3PhysAllocateHandyPages(pVM);
316	if (RT_FAILURE(rc))
317	return rc;
318	}
319
320	/*
321	* Check whether we're out of memory now.
322	*
323	* This may stem from some of the above actions or operations that has been executed
324	* since we ran FFs. The allocate handy pages must for instance always be followed by
325	* this check.
326	*/
327	if (VM_FF_IS_SET(pVM, VM_FF_PGM_NO_MEMORY))
328	return VINF_EM_NO_MEMORY;
329
330	return VINF_SUCCESS;
331	}
332
333
334	/**
335	* Executes hardware accelerated raw code. (Intel VT-x & AMD-V)
336	*
337	* This function contains the raw-mode version of the inner
338	* execution loop (the outer loop being in EMR3ExecuteVM()).
339	*
340	* @returns VBox status code. The most important ones are: VINF_EM_RESCHEDULE, VINF_EM_RESCHEDULE_RAW,
341	* VINF_EM_RESCHEDULE_REM, VINF_EM_SUSPEND, VINF_EM_RESET and VINF_EM_TERMINATE.
342	*
343	* @param pVM The cross context VM structure.
344	* @param pVCpu The cross context virtual CPU structure.
345	* @param pfFFDone Where to store an indicator telling whether or not
346	* FFs were done before returning.
347	*/
348	int emR3HmExecute(PVM pVM, PVMCPU pVCpu, bool *pfFFDone)
349	{
350	int rc = VERR_IPE_UNINITIALIZED_STATUS;
351
352	LogFlow(("emR3HmExecute%d: (cs:eip=%04x:%RGv)\n", pVCpu->idCpu, pVCpu->cpum.GstCtx.cs.Sel, (RTGCPTR)pVCpu->cpum.GstCtx.rip));
353	*pfFFDone = false;
354
355	STAM_COUNTER_INC(&pVCpu->em.s.StatHMExecuteCalled);
356
357	/*
358	* Spin till we get a forced action which returns anything but VINF_SUCCESS.
359	*/
360	for (;;)
361	{
362	STAM_PROFILE_ADV_START(&pVCpu->em.s.StatHMEntry, a);
363
364	/* Check if a forced reschedule is pending. */
365	if (HMR3IsRescheduleRequired(pVM, &pVCpu->cpum.GstCtx))
366	{
367	rc = VINF_EM_RESCHEDULE;
368	break;
369	}
370
371	/*
372	* Process high priority pre-execution raw-mode FFs.
373	*/
374	if ( VM_FF_IS_ANY_SET(pVM, VM_FF_HIGH_PRIORITY_PRE_RAW_MASK)
375	\|\| VMCPU_FF_IS_ANY_SET(pVCpu, VMCPU_FF_HIGH_PRIORITY_PRE_RAW_MASK))
376	{
377	rc = emR3HmForcedActions(pVM, pVCpu);
378	if (rc != VINF_SUCCESS)
379	break;
380	}
381
382	#ifdef LOG_ENABLED
383	/*
384	* Log important stuff before entering GC.
385	*/
386	if (TRPMHasTrap(pVCpu))
387	Log(("CPU%d: Pending hardware interrupt=0x%x cs:rip=%04X:%RGv\n", pVCpu->idCpu, TRPMGetTrapNo(pVCpu), pVCpu->cpum.GstCtx.cs.Sel, (RTGCPTR)pVCpu->cpum.GstCtx.rip));
388
389	uint32_t cpl = CPUMGetGuestCPL(pVCpu);
390	if (pVM->cCpus == 1)
391	{
392	if (pVCpu->cpum.GstCtx.eflags.Bits.u1VM)
393	Log(("HWV86: %08X IF=%d\n", pVCpu->cpum.GstCtx.eip, pVCpu->cpum.GstCtx.eflags.Bits.u1IF));
394	else if (CPUMIsGuestIn64BitCodeEx(&pVCpu->cpum.GstCtx))
395	Log(("HWR%d: %04X:%RGv ESP=%RGv IF=%d IOPL=%d CR0=%x CR4=%x EFER=%x\n", cpl, pVCpu->cpum.GstCtx.cs.Sel, (RTGCPTR)pVCpu->cpum.GstCtx.rip, pVCpu->cpum.GstCtx.rsp, pVCpu->cpum.GstCtx.eflags.Bits.u1IF, pVCpu->cpum.GstCtx.eflags.Bits.u2IOPL, (uint32_t)pVCpu->cpum.GstCtx.cr0, (uint32_t)pVCpu->cpum.GstCtx.cr4, (uint32_t)pVCpu->cpum.GstCtx.msrEFER));
396	else
397	Log(("HWR%d: %04X:%08X ESP=%08X IF=%d IOPL=%d CR0=%x CR4=%x EFER=%x\n", cpl, pVCpu->cpum.GstCtx.cs.Sel, pVCpu->cpum.GstCtx.eip, pVCpu->cpum.GstCtx.esp, pVCpu->cpum.GstCtx.eflags.Bits.u1IF, pVCpu->cpum.GstCtx.eflags.Bits.u2IOPL, (uint32_t)pVCpu->cpum.GstCtx.cr0, (uint32_t)pVCpu->cpum.GstCtx.cr4, (uint32_t)pVCpu->cpum.GstCtx.msrEFER));
398	}
399	else
400	{
401	if (pVCpu->cpum.GstCtx.eflags.Bits.u1VM)
402	Log(("HWV86-CPU%d: %08X IF=%d\n", pVCpu->idCpu, pVCpu->cpum.GstCtx.eip, pVCpu->cpum.GstCtx.eflags.Bits.u1IF));
403	else if (CPUMIsGuestIn64BitCodeEx(&pVCpu->cpum.GstCtx))
404	Log(("HWR%d-CPU%d: %04X:%RGv ESP=%RGv IF=%d IOPL=%d CR0=%x CR4=%x EFER=%x\n", cpl, pVCpu->idCpu, pVCpu->cpum.GstCtx.cs.Sel, (RTGCPTR)pVCpu->cpum.GstCtx.rip, pVCpu->cpum.GstCtx.rsp, pVCpu->cpum.GstCtx.eflags.Bits.u1IF, pVCpu->cpum.GstCtx.eflags.Bits.u2IOPL, (uint32_t)pVCpu->cpum.GstCtx.cr0, (uint32_t)pVCpu->cpum.GstCtx.cr4, (uint32_t)pVCpu->cpum.GstCtx.msrEFER));
405	else
406	Log(("HWR%d-CPU%d: %04X:%08X ESP=%08X IF=%d IOPL=%d CR0=%x CR4=%x EFER=%x\n", cpl, pVCpu->idCpu, pVCpu->cpum.GstCtx.cs.Sel, pVCpu->cpum.GstCtx.eip, pVCpu->cpum.GstCtx.esp, pVCpu->cpum.GstCtx.eflags.Bits.u1IF, pVCpu->cpum.GstCtx.eflags.Bits.u2IOPL, (uint32_t)pVCpu->cpum.GstCtx.cr0, (uint32_t)pVCpu->cpum.GstCtx.cr4, (uint32_t)pVCpu->cpum.GstCtx.msrEFER));
407	}
408	#endif /* LOG_ENABLED */
409
410	/*
411	* Execute the code.
412	*/
413	STAM_PROFILE_ADV_STOP(&pVCpu->em.s.StatHMEntry, a);
414
415	if (RT_LIKELY(emR3IsExecutionAllowed(pVM, pVCpu)))
416	{
417	STAM_PROFILE_START(&pVCpu->em.s.StatHMExec, x);
418	rc = VMMR3HmRunGC(pVM, pVCpu);
419	STAM_PROFILE_STOP(&pVCpu->em.s.StatHMExec, x);
420	}
421	else
422	{
423	/* Give up this time slice; virtual time continues */
424	STAM_REL_PROFILE_ADV_START(&pVCpu->em.s.StatCapped, u);
425	RTThreadSleep(5);
426	STAM_REL_PROFILE_ADV_STOP(&pVCpu->em.s.StatCapped, u);
427	rc = VINF_SUCCESS;
428	}
429
430
431	/*
432	* Deal with high priority post execution FFs before doing anything else.
433	*/
434	VMCPU_FF_CLEAR_MASK(pVCpu, VMCPU_FF_RESUME_GUEST_MASK);
435	if ( VM_FF_IS_ANY_SET(pVM, VM_FF_HIGH_PRIORITY_POST_MASK)
436	\|\| VMCPU_FF_IS_ANY_SET(pVCpu, VMCPU_FF_HIGH_PRIORITY_POST_MASK))
437	rc = VBOXSTRICTRC_TODO(emR3HighPriorityPostForcedActions(pVM, pVCpu, rc));
438
439	/*
440	* Process the returned status code.
441	*/
442	if (rc >= VINF_EM_FIRST && rc <= VINF_EM_LAST)
443	break;
444
445	rc = emR3HmHandleRC(pVM, pVCpu, rc);
446	if (rc != VINF_SUCCESS)
447	break;
448
449	/*
450	* Check and execute forced actions.
451	*/
452	#ifdef VBOX_HIGH_RES_TIMERS_HACK
453	TMTimerPollVoid(pVM, pVCpu);
454	#endif
455	if ( VM_FF_IS_ANY_SET(pVM, VM_FF_ALL_MASK)
456	\|\| VMCPU_FF_IS_ANY_SET(pVCpu, VMCPU_FF_ALL_MASK))
457	{
458	rc = emR3ForcedActions(pVM, pVCpu, rc);
459	VBOXVMM_EM_FF_ALL_RET(pVCpu, rc);
460	if ( rc != VINF_SUCCESS
461	&& rc != VINF_EM_RESCHEDULE_HM)
462	{
463	*pfFFDone = true;
464	break;
465	}
466	}
467	}
468
469	/*
470	* Return to outer loop.
471	*/
472	#if defined(LOG_ENABLED) && defined(DEBUG)
473	RTLogFlush(NULL);
474	#endif
475	return rc;
476	}
477

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source: vbox/trunk/src/VBox/VMM/VMMR3/EMHM.cpp@ 93609

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