PGMAllBth.h@ 12997

Last change on this file since 12997 was 12997, checked in by vboxsync, 17 years ago
Fixed regressions in return code checking
Property svn:eol-style set to `native` Property svn:keywords set to `Id`
File size: 192.0 KB

Line
1	/* $Id: PGMAllBth.h 12997 2008-10-06 09:31:20Z vboxsync $ */
2	/** @file
3	* VBox - Page Manager, Shadow+Guest Paging Template - All context code.
4	*
5	* This file is a big challenge!
6	*/
7
8	/*
9	* Copyright (C) 2006-2007 Sun Microsystems, Inc.
10	*
11	* This file is part of VirtualBox Open Source Edition (OSE), as
12	* available from http://www.virtualbox.org. This file is free software;
13	* you can redistribute it and/or modify it under the terms of the GNU
14	* General Public License (GPL) as published by the Free Software
15	* Foundation, in version 2 as it comes in the "COPYING" file of the
16	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
17	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
18	*
19	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
20	* Clara, CA 95054 USA or visit http://www.sun.com if you need
21	* additional information or have any questions.
22	*/
23
24	/*******************************************************************************
25	* Internal Functions *
26	*******************************************************************************/
27	__BEGIN_DECLS
28	PGM_BTH_DECL(int, Trap0eHandler)(PVM pVM, RTGCUINT uErr, PCPUMCTXCORE pRegFrame, RTGCPTR pvFault);
29	PGM_BTH_DECL(int, InvalidatePage)(PVM pVM, RTGCUINTPTR GCPtrPage);
30	PGM_BTH_DECL(int, SyncPage)(PVM pVM, GSTPDE PdeSrc, RTGCUINTPTR GCPtrPage, unsigned cPages, unsigned uErr);
31	PGM_BTH_DECL(int, CheckPageFault)(PVM pVM, uint32_t uErr, PSHWPDE pPdeDst, PGSTPDE pPdeSrc, RTGCUINTPTR GCPtrPage);
32	PGM_BTH_DECL(int, SyncPT)(PVM pVM, unsigned iPD, PGSTPD pPDSrc, RTGCUINTPTR GCPtrPage);
33	PGM_BTH_DECL(int, VerifyAccessSyncPage)(PVM pVM, RTGCUINTPTR Addr, unsigned fPage, unsigned uErr);
34	PGM_BTH_DECL(int, PrefetchPage)(PVM pVM, RTGCUINTPTR GCPtrPage);
35	PGM_BTH_DECL(int, SyncCR3)(PVM pVM, uint64_t cr0, uint64_t cr3, uint64_t cr4, bool fGlobal);
36	#ifdef VBOX_STRICT
37	PGM_BTH_DECL(unsigned, AssertCR3)(PVM pVM, uint64_t cr3, uint64_t cr4, RTGCUINTPTR GCPtr = 0, RTGCUINTPTR cb = ~(RTGCUINTPTR)0);
38	#endif
39	#ifdef PGMPOOL_WITH_USER_TRACKING
40	DECLINLINE(void) PGM_BTH_NAME(SyncPageWorkerTrackDeref)(PVM pVM, PPGMPOOLPAGE pShwPage, RTHCPHYS HCPhys);
41	#endif
42	__END_DECLS
43
44
45	/* Filter out some illegal combinations of guest and shadow paging, so we can remove redundant checks inside functions. */
46	#if PGM_GST_TYPE == PGM_TYPE_PAE && PGM_SHW_TYPE != PGM_TYPE_PAE && PGM_SHW_TYPE != PGM_TYPE_NESTED && PGM_SHW_TYPE != PGM_TYPE_EPT
47	# error "Invalid combination; PAE guest implies PAE shadow"
48	#endif
49
50	#if (PGM_GST_TYPE == PGM_TYPE_REAL \|\| PGM_GST_TYPE == PGM_TYPE_PROT) \
51	&& !(PGM_SHW_TYPE == PGM_TYPE_32BIT \|\| PGM_SHW_TYPE == PGM_TYPE_PAE \|\| PGM_SHW_TYPE == PGM_TYPE_AMD64 \|\| PGM_SHW_TYPE == PGM_TYPE_NESTED \|\| PGM_SHW_TYPE == PGM_TYPE_EPT)
52	# error "Invalid combination; real or protected mode without paging implies 32 bits or PAE shadow paging."
53	#endif
54
55	#if (PGM_GST_TYPE == PGM_TYPE_32BIT \|\| PGM_GST_TYPE == PGM_TYPE_PAE) \
56	&& !(PGM_SHW_TYPE == PGM_TYPE_32BIT \|\| PGM_SHW_TYPE == PGM_TYPE_PAE \|\| PGM_SHW_TYPE == PGM_TYPE_NESTED \|\| PGM_SHW_TYPE == PGM_TYPE_EPT)
57	# error "Invalid combination; 32 bits guest paging or PAE implies 32 bits or PAE shadow paging."
58	#endif
59
60	#if (PGM_GST_TYPE == PGM_TYPE_AMD64 && PGM_SHW_TYPE != PGM_TYPE_AMD64 && PGM_SHW_TYPE != PGM_TYPE_NESTED && PGM_SHW_TYPE != PGM_TYPE_EPT) \
61	\|\| (PGM_SHW_TYPE == PGM_TYPE_AMD64 && PGM_GST_TYPE != PGM_TYPE_AMD64 && PGM_GST_TYPE != PGM_TYPE_PROT)
62	# error "Invalid combination; AMD64 guest implies AMD64 shadow and vice versa"
63	#endif
64
65	#ifdef IN_RING0 /* no mappings in VT-x and AMD-V mode */
66	# define PGM_WITHOUT_MAPPINGS
67	#endif
68
69	/**
70	* #PF Handler for raw-mode guest execution.
71	*
72	* @returns VBox status code (appropriate for trap handling and GC return).
73	* @param pVM VM Handle.
74	* @param uErr The trap error code.
75	* @param pRegFrame Trap register frame.
76	* @param pvFault The fault address.
77	*/
78	PGM_BTH_DECL(int, Trap0eHandler)(PVM pVM, RTGCUINT uErr, PCPUMCTXCORE pRegFrame, RTGCPTR pvFault)
79	{
80	#if (PGM_GST_TYPE == PGM_TYPE_32BIT \|\| PGM_GST_TYPE == PGM_TYPE_REAL \|\| PGM_GST_TYPE == PGM_TYPE_PROT \|\| PGM_GST_TYPE == PGM_TYPE_PAE \|\| PGM_GST_TYPE == PGM_TYPE_AMD64) \
81	&& PGM_SHW_TYPE != PGM_TYPE_NESTED \
82	&& (PGM_SHW_TYPE != PGM_TYPE_EPT \|\| PGM_GST_TYPE == PGM_TYPE_PROT)
83
84	# if PGM_SHW_TYPE == PGM_TYPE_PAE && PGM_GST_TYPE != PGM_TYPE_PAE
85	/*
86	* Hide the instruction fetch trap indicator for now.
87	*/
88	/** @todo NXE will change this and we must fix NXE in the switcher too! */
89	if (uErr & X86_TRAP_PF_ID)
90	{
91	uErr &= ~X86_TRAP_PF_ID;
92	TRPMSetErrorCode(pVM, uErr);
93	}
94	# endif
95
96	/*
97	* Get PDs.
98	*/
99	int rc;
100	# if PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE)
101	# if PGM_GST_TYPE == PGM_TYPE_32BIT
102	const unsigned iPDSrc = (RTGCUINTPTR)pvFault >> GST_PD_SHIFT;
103	PGSTPD pPDSrc = CTXSUFF(pVM->pgm.s.pGuestPD);
104
105	# elif PGM_GST_TYPE == PGM_TYPE_PAE \|\| PGM_GST_TYPE == PGM_TYPE_AMD64
106
107	# if PGM_GST_TYPE == PGM_TYPE_PAE
108	unsigned iPDSrc;
109	PGSTPD pPDSrc = pgmGstGetPaePDPtr(&pVM->pgm.s, (RTGCUINTPTR)pvFault, &iPDSrc);
110
111	# elif PGM_GST_TYPE == PGM_TYPE_AMD64
112	unsigned iPDSrc;
113	PX86PML4E pPml4eSrc;
114	X86PDPE PdpeSrc;
115	PGSTPD pPDSrc;
116
117	pPDSrc = pgmGstGetLongModePDPtr(&pVM->pgm.s, pvFault, &pPml4eSrc, &PdpeSrc, &iPDSrc);
118	Assert(pPml4eSrc);
119	# endif
120	/* Quick check for a valid guest trap. */
121	if (!pPDSrc)
122	{
123	LogFlow(("Trap0eHandler: guest PDPTR %d not present CR3=%VGp\n", (pvFault >> X86_PML4_SHIFT) & X86_PML4_MASK, (CPUMGetGuestCR3(pVM) & X86_CR3_PAGE_MASK)));
124	STAM_STATS({ pVM->pgm.s.CTXSUFF(pStatTrap0eAttribution) = &pVM->pgm.s.StatTrap0eGuestTrap; });
125	TRPMSetErrorCode(pVM, uErr);
126	return VINF_EM_RAW_GUEST_TRAP;
127	}
128	# endif
129	# else
130	PGSTPD pPDSrc = NULL;
131	const unsigned iPDSrc = 0;
132	# endif
133
134	# if PGM_SHW_TYPE == PGM_TYPE_32BIT
135	const unsigned iPDDst = (RTGCUINTPTR)pvFault >> SHW_PD_SHIFT;
136	PX86PD pPDDst = pVM->pgm.s.CTXMID(p,32BitPD);
137	# elif PGM_SHW_TYPE == PGM_TYPE_PAE
138	const unsigned iPDDst = (RTGCUINTPTR)pvFault >> SHW_PD_SHIFT;
139	PX86PDPAE pPDDst = pVM->pgm.s.CTXMID(ap,PaePDs)[0]; /* We treat this as a PD with 2048 entries, so no need to and with SHW_PD_MASK to get iPDDst */
140
141	# if PGM_GST_TYPE == PGM_TYPE_PAE
142	/* Did we mark the PDPT as not present in SyncCR3? */
143	unsigned iPdpte = ((RTGCUINTPTR)pvFault >> SHW_PDPT_SHIFT) & SHW_PDPT_MASK;
144	if (!pVM->pgm.s.CTXMID(p,PaePDPT)->a[iPdpte].n.u1Present)
145	pVM->pgm.s.CTXMID(p,PaePDPT)->a[iPdpte].n.u1Present = 1;
146
147	# endif
148
149	# elif PGM_SHW_TYPE == PGM_TYPE_AMD64
150	const unsigned iPDDst = (((RTGCUINTPTR)pvFault >> SHW_PD_SHIFT) & SHW_PD_MASK);
151	PX86PDPAE pPDDst;
152	# if PGM_GST_TYPE == PGM_TYPE_PROT
153	/* AMD-V nested paging */
154	X86PML4E Pml4eSrc;
155	X86PDPE PdpeSrc;
156	PX86PML4E pPml4eSrc = &Pml4eSrc;
157
158	/* Fake PML4 & PDPT entry; access control handled on the page table level, so allow everything. */
159	Pml4eSrc.u = X86_PML4E_P \| X86_PML4E_RW \| X86_PML4E_US \| X86_PML4E_A;
160	PdpeSrc.u = X86_PDPE_P \| X86_PDPE_RW \| X86_PDPE_US \| X86_PDPE_A;
161	# endif
162
163	rc = PGMShwSyncLongModePDPtr(pVM, (RTGCUINTPTR)pvFault, pPml4eSrc, &PdpeSrc, &pPDDst);
164	AssertReturn(rc == VINF_SUCCESS /* must test for VINF_SUCCESS!! */, rc);
165	Assert(pPDDst);
166	# elif PGM_SHW_TYPE == PGM_TYPE_EPT
167	const unsigned iPDDst = (((RTGCUINTPTR)pvFault >> SHW_PD_SHIFT) & SHW_PD_MASK);
168	PEPTPD pPDDst;
169
170	rc = PGMShwGetEPTPDPtr(pVM, (RTGCUINTPTR)pvFault, NULL, &pPDDst);
171	AssertRCReturn(rc, rc);
172	Assert(pPDDst);
173	# endif
174
175	# if PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE)
176	/*
177	* If we successfully correct the write protection fault due to dirty bit
178	* tracking, or this page fault is a genuine one, then return immediately.
179	*/
180	STAM_PROFILE_START(&pVM->pgm.s.StatCheckPageFault, e);
181	rc = PGM_BTH_NAME(CheckPageFault)(pVM, uErr, &pPDDst->a[iPDDst], &pPDSrc->a[iPDSrc], (RTGCUINTPTR)pvFault);
182	STAM_PROFILE_STOP(&pVM->pgm.s.StatCheckPageFault, e);
183	if ( rc == VINF_PGM_HANDLED_DIRTY_BIT_FAULT
184	\|\| rc == VINF_EM_RAW_GUEST_TRAP)
185	{
186	STAM_STATS({ pVM->pgm.s.CTXSUFF(pStatTrap0eAttribution)
187	= rc == VINF_PGM_HANDLED_DIRTY_BIT_FAULT ? &pVM->pgm.s.StatTrap0eDirtyAndAccessedBits : &pVM->pgm.s.StatTrap0eGuestTrap; });
188	LogBird(("Trap0eHandler: returns %s\n", rc == VINF_PGM_HANDLED_DIRTY_BIT_FAULT ? "VINF_SUCCESS" : "VINF_EM_RAW_GUEST_TRAP"));
189	return rc == VINF_PGM_HANDLED_DIRTY_BIT_FAULT ? VINF_SUCCESS : rc;
190	}
191
192	STAM_COUNTER_INC(&pVM->pgm.s.StatGCTrap0ePD[iPDSrc]);
193	# endif /* PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE) */
194
195	/*
196	* A common case is the not-present error caused by lazy page table syncing.
197	*
198	* It is IMPORTANT that we weed out any access to non-present shadow PDEs here
199	* so we can safely assume that the shadow PT is present when calling SyncPage later.
200	*
201	* On failure, we ASSUME that SyncPT is out of memory or detected some kind
202	* of mapping conflict and defer to SyncCR3 in R3.
203	* (Again, we do NOT support access handlers for non-present guest pages.)
204	*
205	*/
206	# if PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE)
207	GSTPDE PdeSrc = pPDSrc->a[iPDSrc];
208	# else
209	GSTPDE PdeSrc;
210	PdeSrc.au32[0] = 0; /* faked so we don't have to #ifdef everything */
211	PdeSrc.n.u1Present = 1;
212	PdeSrc.n.u1Write = 1;
213	PdeSrc.n.u1Accessed = 1;
214	PdeSrc.n.u1User = 1;
215	# endif
216	if ( !(uErr & X86_TRAP_PF_P) /* not set means page not present instead of page protection violation */
217	&& !pPDDst->a[iPDDst].n.u1Present
218	&& PdeSrc.n.u1Present
219	)
220
221	{
222	STAM_STATS({ pVM->pgm.s.CTXSUFF(pStatTrap0eAttribution) = &pVM->pgm.s.StatTrap0eSyncPT; });
223	STAM_PROFILE_START(&pVM->pgm.s.StatLazySyncPT, f);
224	LogFlow(("=>SyncPT %04x = %08x\n", iPDSrc, PdeSrc.au32[0]));
225	rc = PGM_BTH_NAME(SyncPT)(pVM, iPDSrc, pPDSrc, (RTGCUINTPTR)pvFault);
226	if (VBOX_SUCCESS(rc))
227	{
228	STAM_PROFILE_STOP(&pVM->pgm.s.StatLazySyncPT, f);
229	return rc;
230	}
231	Log(("SyncPT: %d failed!! rc=%d\n", iPDSrc, rc));
232	VM_FF_SET(pVM, VM_FF_PGM_SYNC_CR3); /** @todo no need to do global sync, right? */
233	STAM_PROFILE_STOP(&pVM->pgm.s.StatLazySyncPT, f);
234	return VINF_PGM_SYNC_CR3;
235	}
236
237	# if PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE)
238	/*
239	* Check if this address is within any of our mappings.
240	*
241	* This is very fast and it's gonna save us a bit of effort below and prevent
242	* us from screwing ourself with MMIO2 pages which have a GC Mapping (VRam).
243	* (BTW, it's impossible to have physical access handlers in a mapping.)
244	*/
245	if (pgmMapAreMappingsEnabled(&pVM->pgm.s))
246	{
247	STAM_PROFILE_START(&pVM->pgm.s.StatMapping, a);
248	PPGMMAPPING pMapping = CTXALLSUFF(pVM->pgm.s.pMappings);
249	for ( ; pMapping; pMapping = CTXALLSUFF(pMapping->pNext))
250	{
251	if ((RTGCUINTPTR)pvFault < (RTGCUINTPTR)pMapping->GCPtr)
252	break;
253	if ((RTGCUINTPTR)pvFault - (RTGCUINTPTR)pMapping->GCPtr < pMapping->cb)
254	{
255	/*
256	* The first thing we check is if we've got an undetected conflict.
257	*/
258	if (!pVM->pgm.s.fMappingsFixed)
259	{
260	unsigned iPT = pMapping->cb >> GST_PD_SHIFT;
261	while (iPT-- > 0)
262	if (pPDSrc->a[iPDSrc + iPT].n.u1Present)
263	{
264	STAM_COUNTER_INC(&pVM->pgm.s.StatGCTrap0eConflicts);
265	Log(("Trap0e: Detected Conflict %VGv-%VGv\n", pMapping->GCPtr, pMapping->GCPtrLast));
266	VM_FF_SET(pVM, VM_FF_PGM_SYNC_CR3); /** @todo no need to do global sync,right? */
267	STAM_PROFILE_STOP(&pVM->pgm.s.StatMapping, a);
268	return VINF_PGM_SYNC_CR3;
269	}
270	}
271
272	/*
273	* Check if the fault address is in a virtual page access handler range.
274	*/
275	PPGMVIRTHANDLER pCur = (PPGMVIRTHANDLER)RTAvlroGCPtrRangeGet(&CTXSUFF(pVM->pgm.s.pTrees)->HyperVirtHandlers, pvFault);
276	if ( pCur
277	&& (RTGCUINTPTR)pvFault - (RTGCUINTPTR)pCur->GCPtr < pCur->cb
278	&& uErr & X86_TRAP_PF_RW)
279	{
280	# ifdef IN_GC
281	STAM_PROFILE_START(&pCur->Stat, h);
282	rc = CTXSUFF(pCur->pfnHandler)(pVM, uErr, pRegFrame, pvFault, pCur->GCPtr, (RTGCUINTPTR)pvFault - (RTGCUINTPTR)pCur->GCPtr);
283	STAM_PROFILE_STOP(&pCur->Stat, h);
284	# else
285	AssertFailed();
286	rc = VINF_EM_RAW_EMULATE_INSTR; /* can't happen with VMX */
287	# endif
288	STAM_COUNTER_INC(&pVM->pgm.s.StatTrap0eMapHandler);
289	STAM_PROFILE_STOP(&pVM->pgm.s.StatMapping, a);
290	return rc;
291	}
292
293	/*
294	* Pretend we're not here and let the guest handle the trap.
295	*/
296	TRPMSetErrorCode(pVM, uErr & ~X86_TRAP_PF_P);
297	STAM_COUNTER_INC(&pVM->pgm.s.StatGCTrap0eMap);
298	LogFlow(("PGM: Mapping access -> route trap to recompiler!\n"));
299	STAM_PROFILE_STOP(&pVM->pgm.s.StatMapping, a);
300	return VINF_EM_RAW_GUEST_TRAP;
301	}
302	}
303	STAM_PROFILE_STOP(&pVM->pgm.s.StatMapping, a);
304	} /* pgmAreMappingsEnabled(&pVM->pgm.s) */
305	# endif /* PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE) */
306
307	/*
308	* Check if this fault address is flagged for special treatment,
309	* which means we'll have to figure out the physical address and
310	* check flags associated with it.
311	*
312	* ASSUME that we can limit any special access handling to pages
313	* in page tables which the guest believes to be present.
314	*/
315	if (PdeSrc.n.u1Present)
316	{
317	RTGCPHYS GCPhys = NIL_RTGCPHYS;
318
319	# if PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE)
320	# if PGM_GST_TYPE == PGM_TYPE_AMD64
321	bool fBigPagesSupported = true;
322	# else
323	bool fBigPagesSupported = !!(CPUMGetGuestCR4(pVM) & X86_CR4_PSE);
324	# endif
325	if ( PdeSrc.b.u1Size
326	&& fBigPagesSupported)
327	GCPhys = GST_GET_PDE_BIG_PG_GCPHYS(PdeSrc)
328	\| ((RTGCPHYS)pvFault & (GST_BIG_PAGE_OFFSET_MASK ^ PAGE_OFFSET_MASK));
329	else
330	{
331	PGSTPT pPTSrc;
332	rc = PGM_GCPHYS_2_PTR(pVM, PdeSrc.u & GST_PDE_PG_MASK, &pPTSrc);
333	if (VBOX_SUCCESS(rc))
334	{
335	unsigned iPTESrc = ((RTGCUINTPTR)pvFault >> GST_PT_SHIFT) & GST_PT_MASK;
336	if (pPTSrc->a[iPTESrc].n.u1Present)
337	GCPhys = pPTSrc->a[iPTESrc].u & GST_PTE_PG_MASK;
338	}
339	}
340	# else
341	/* No paging so the fault address is the physical address */
342	GCPhys = (RTGCPHYS)((RTGCUINTPTR)pvFault & ~PAGE_OFFSET_MASK);
343	# endif /* PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE) */
344
345	/*
346	* If we have a GC address we'll check if it has any flags set.
347	*/
348	if (GCPhys != NIL_RTGCPHYS)
349	{
350	STAM_PROFILE_START(&pVM->pgm.s.StatHandlers, b);
351
352	PPGMPAGE pPage;
353	rc = pgmPhysGetPageEx(&pVM->pgm.s, GCPhys, &pPage);
354	if (VBOX_SUCCESS(rc))
355	{
356	if (PGM_PAGE_HAS_ANY_HANDLERS(pPage))
357	{
358	if (PGM_PAGE_HAS_ANY_PHYSICAL_HANDLERS(pPage))
359	{
360	/*
361	* Physical page access handler.
362	*/
363	const RTGCPHYS GCPhysFault = GCPhys \| ((RTGCUINTPTR)pvFault & PAGE_OFFSET_MASK);
364	PPGMPHYSHANDLER pCur = (PPGMPHYSHANDLER)RTAvlroGCPhysRangeGet(&CTXSUFF(pVM->pgm.s.pTrees)->PhysHandlers, GCPhysFault);
365	if (pCur)
366	{
367	# ifdef PGM_SYNC_N_PAGES
368	/*
369	* If the region is write protected and we got a page not present fault, then sync
370	* the pages. If the fault was caused by a read, then restart the instruction.
371	* In case of write access continue to the GC write handler.
372	*
373	* ASSUMES that there is only one handler per page or that they have similar write properties.
374	*/
375	if ( pCur->enmType == PGMPHYSHANDLERTYPE_PHYSICAL_WRITE
376	&& !(uErr & X86_TRAP_PF_P))
377	{
378	rc = PGM_BTH_NAME(SyncPage)(pVM, PdeSrc, (RTGCUINTPTR)pvFault, PGM_SYNC_NR_PAGES, uErr);
379	if ( VBOX_FAILURE(rc)
380	\|\| !(uErr & X86_TRAP_PF_RW)
381	\|\| rc == VINF_PGM_SYNCPAGE_MODIFIED_PDE)
382	{
383	AssertRC(rc);
384	STAM_COUNTER_INC(&pVM->pgm.s.StatHandlersOutOfSync);
385	STAM_PROFILE_STOP(&pVM->pgm.s.StatHandlers, b);
386	STAM_STATS({ pVM->pgm.s.CTXSUFF(pStatTrap0eAttribution) = &pVM->pgm.s.StatTrap0eOutOfSyncHndPhys; });
387	return rc;
388	}
389	}
390	# endif
391
392	AssertMsg( pCur->enmType != PGMPHYSHANDLERTYPE_PHYSICAL_WRITE
393	\|\| (pCur->enmType == PGMPHYSHANDLERTYPE_PHYSICAL_WRITE && (uErr & X86_TRAP_PF_RW)),
394	("Unexpected trap for physical handler: %08X (phys=%08x) HCPhys=%X uErr=%X, enum=%d\n", pvFault, GCPhys, pPage->HCPhys, uErr, pCur->enmType));
395
396	#if defined(IN_GC) \|\| defined(IN_RING0)
397	if (CTXALLSUFF(pCur->pfnHandler))
398	{
399	STAM_PROFILE_START(&pCur->Stat, h);
400	rc = pCur->CTXALLSUFF(pfnHandler)(pVM, uErr, pRegFrame, pvFault, GCPhysFault, CTXALLSUFF(pCur->pvUser));
401	STAM_PROFILE_STOP(&pCur->Stat, h);
402	}
403	else
404	#endif
405	rc = VINF_EM_RAW_EMULATE_INSTR;
406	STAM_COUNTER_INC(&pVM->pgm.s.StatHandlersPhysical);
407	STAM_PROFILE_STOP(&pVM->pgm.s.StatHandlers, b);
408	STAM_STATS({ pVM->pgm.s.CTXSUFF(pStatTrap0eAttribution) = &pVM->pgm.s.StatTrap0eHndPhys; });
409	return rc;
410	}
411	}
412	# if PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE)
413	else
414	{
415	# ifdef PGM_SYNC_N_PAGES
416	/*
417	* If the region is write protected and we got a page not present fault, then sync
418	* the pages. If the fault was caused by a read, then restart the instruction.
419	* In case of write access continue to the GC write handler.
420	*/
421	if ( PGM_PAGE_GET_HNDL_VIRT_STATE(pPage) < PGM_PAGE_HNDL_PHYS_STATE_ALL
422	&& !(uErr & X86_TRAP_PF_P))
423	{
424	rc = PGM_BTH_NAME(SyncPage)(pVM, PdeSrc, (RTGCUINTPTR)pvFault, PGM_SYNC_NR_PAGES, uErr);
425	if ( VBOX_FAILURE(rc)
426	\|\| rc == VINF_PGM_SYNCPAGE_MODIFIED_PDE
427	\|\| !(uErr & X86_TRAP_PF_RW))
428	{
429	AssertRC(rc);
430	STAM_COUNTER_INC(&pVM->pgm.s.StatHandlersOutOfSync);
431	STAM_PROFILE_STOP(&pVM->pgm.s.StatHandlers, b);
432	STAM_STATS({ pVM->pgm.s.CTXSUFF(pStatTrap0eAttribution) = &pVM->pgm.s.StatTrap0eOutOfSyncHndVirt; });
433	return rc;
434	}
435	}
436	# endif
437	/*
438	* Ok, it's an virtual page access handler.
439	*
440	* Since it's faster to search by address, we'll do that first
441	* and then retry by GCPhys if that fails.
442	*/
443	/** @todo r=bird: perhaps we should consider looking up by physical address directly now? */
444	/** @note r=svl: true, but lookup on virtual address should remain as a fallback as phys & virt trees might be out of sync, because the
445	* page was changed without us noticing it (not-present -> present without invlpg or mov cr3, xxx)
446	*/
447	PPGMVIRTHANDLER pCur = (PPGMVIRTHANDLER)RTAvlroGCPtrRangeGet(&CTXSUFF(pVM->pgm.s.pTrees)->VirtHandlers, pvFault);
448	if (pCur)
449	{
450	AssertMsg(!((RTGCUINTPTR)pvFault - (RTGCUINTPTR)pCur->GCPtr < pCur->cb)
451	\|\| ( pCur->enmType != PGMVIRTHANDLERTYPE_WRITE
452	\|\| !(uErr & X86_TRAP_PF_P)
453	\|\| (pCur->enmType == PGMVIRTHANDLERTYPE_WRITE && (uErr & X86_TRAP_PF_RW))),
454	("Unexpected trap for virtual handler: %VGv (phys=%VGp) HCPhys=%HGp uErr=%X, enum=%d\n", pvFault, GCPhys, pPage->HCPhys, uErr, pCur->enmType));
455
456	if ( (RTGCUINTPTR)pvFault - (RTGCUINTPTR)pCur->GCPtr < pCur->cb
457	&& ( uErr & X86_TRAP_PF_RW
458	\|\| pCur->enmType != PGMVIRTHANDLERTYPE_WRITE ) )
459	{
460	# ifdef IN_GC
461	STAM_PROFILE_START(&pCur->Stat, h);
462	rc = CTXSUFF(pCur->pfnHandler)(pVM, uErr, pRegFrame, pvFault, pCur->GCPtr, (RTGCUINTPTR)pvFault - (RTGCUINTPTR)pCur->GCPtr);
463	STAM_PROFILE_STOP(&pCur->Stat, h);
464	# else
465	rc = VINF_EM_RAW_EMULATE_INSTR; /** @todo for VMX */
466	# endif
467	STAM_COUNTER_INC(&pVM->pgm.s.StatHandlersVirtual);
468	STAM_PROFILE_STOP(&pVM->pgm.s.StatHandlers, b);
469	STAM_STATS({ pVM->pgm.s.CTXSUFF(pStatTrap0eAttribution) = &pVM->pgm.s.StatTrap0eHndVirt; });
470	return rc;
471	}
472	/* Unhandled part of a monitored page */
473	}
474	else
475	{
476	/* Check by physical address. */
477	PPGMVIRTHANDLER pCur;
478	unsigned iPage;
479	rc = pgmHandlerVirtualFindByPhysAddr(pVM, GCPhys + ((RTGCUINTPTR)pvFault & PAGE_OFFSET_MASK),
480	&pCur, &iPage);
481	Assert(VBOX_SUCCESS(rc) \|\| !pCur);
482	if ( pCur
483	&& ( uErr & X86_TRAP_PF_RW
484	\|\| pCur->enmType != PGMVIRTHANDLERTYPE_WRITE ) )
485	{
486	Assert((pCur->aPhysToVirt[iPage].Core.Key & X86_PTE_PAE_PG_MASK) == GCPhys);
487	# ifdef IN_GC
488	RTGCUINTPTR off = (iPage << PAGE_SHIFT) + ((RTGCUINTPTR)pvFault & PAGE_OFFSET_MASK) - ((RTGCUINTPTR)pCur->GCPtr & PAGE_OFFSET_MASK);
489	Assert(off < pCur->cb);
490	STAM_PROFILE_START(&pCur->Stat, h);
491	rc = CTXSUFF(pCur->pfnHandler)(pVM, uErr, pRegFrame, pvFault, pCur->GCPtr, off);
492	STAM_PROFILE_STOP(&pCur->Stat, h);
493	# else
494	rc = VINF_EM_RAW_EMULATE_INSTR; /** @todo for VMX */
495	# endif
496	STAM_COUNTER_INC(&pVM->pgm.s.StatHandlersVirtualByPhys);
497	STAM_PROFILE_STOP(&pVM->pgm.s.StatHandlers, b);
498	STAM_STATS({ pVM->pgm.s.CTXSUFF(pStatTrap0eAttribution) = &pVM->pgm.s.StatTrap0eHndVirt; });
499	return rc;
500	}
501	}
502	}
503	# endif /* PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE) */
504
505	/*
506	* There is a handled area of the page, but this fault doesn't belong to it.
507	* We must emulate the instruction.
508	*
509	* To avoid crashing (non-fatal) in the interpreter and go back to the recompiler
510	* we first check if this was a page-not-present fault for a page with only
511	* write access handlers. Restart the instruction if it wasn't a write access.
512	*/
513	STAM_COUNTER_INC(&pVM->pgm.s.StatHandlersUnhandled);
514
515	if ( !PGM_PAGE_HAS_ACTIVE_ALL_HANDLERS(pPage)
516	&& !(uErr & X86_TRAP_PF_P))
517	{
518	rc = PGM_BTH_NAME(SyncPage)(pVM, PdeSrc, (RTGCUINTPTR)pvFault, PGM_SYNC_NR_PAGES, uErr);
519	if ( VBOX_FAILURE(rc)
520	\|\| rc == VINF_PGM_SYNCPAGE_MODIFIED_PDE
521	\|\| !(uErr & X86_TRAP_PF_RW))
522	{
523	AssertRC(rc);
524	STAM_COUNTER_INC(&pVM->pgm.s.StatHandlersOutOfSync);
525	STAM_PROFILE_STOP(&pVM->pgm.s.StatHandlers, b);
526	STAM_STATS({ pVM->pgm.s.CTXSUFF(pStatTrap0eAttribution) = &pVM->pgm.s.StatTrap0eOutOfSyncHndPhys; });
527	return rc;
528	}
529	}
530
531	/** @todo This particular case can cause quite a lot of overhead. E.g. early stage of kernel booting in Ubuntu 6.06
532	* It's writing to an unhandled part of the LDT page several million times.
533	*/
534	rc = PGMInterpretInstruction(pVM, pRegFrame, pvFault);
535	LogFlow(("PGM: PGMInterpretInstruction -> rc=%d HCPhys=%RHp%s%s\n",
536	rc, pPage->HCPhys,
537	PGM_PAGE_HAS_ANY_PHYSICAL_HANDLERS(pPage) ? " phys" : "",
538	PGM_PAGE_HAS_ANY_VIRTUAL_HANDLERS(pPage) ? " virt" : ""));
539	STAM_PROFILE_STOP(&pVM->pgm.s.StatHandlers, b);
540	STAM_STATS({ pVM->pgm.s.CTXSUFF(pStatTrap0eAttribution) = &pVM->pgm.s.StatTrap0eHndUnhandled; });
541	return rc;
542	} /* if any kind of handler */
543
544	# if PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE)
545	if (uErr & X86_TRAP_PF_P)
546	{
547	/*
548	* The page isn't marked, but it might still be monitored by a virtual page access handler.
549	* (ASSUMES no temporary disabling of virtual handlers.)
550	*/
551	/** @todo r=bird: Since the purpose is to catch out of sync pages with virtual handler(s) here,
552	* we should correct both the shadow page table and physical memory flags, and not only check for
553	* accesses within the handler region but for access to pages with virtual handlers. */
554	PPGMVIRTHANDLER pCur = (PPGMVIRTHANDLER)RTAvlroGCPtrRangeGet(&CTXSUFF(pVM->pgm.s.pTrees)->VirtHandlers, pvFault);
555	if (pCur)
556	{
557	AssertMsg( !((RTGCUINTPTR)pvFault - (RTGCUINTPTR)pCur->GCPtr < pCur->cb)
558	\|\| ( pCur->enmType != PGMVIRTHANDLERTYPE_WRITE
559	\|\| !(uErr & X86_TRAP_PF_P)
560	\|\| (pCur->enmType == PGMVIRTHANDLERTYPE_WRITE && (uErr & X86_TRAP_PF_RW))),
561	("Unexpected trap for virtual handler: %08X (phys=%08x) HCPhys=%X uErr=%X, enum=%d\n", pvFault, GCPhys, pPage->HCPhys, uErr, pCur->enmType));
562
563	if ( (RTGCUINTPTR)pvFault - (RTGCUINTPTR)pCur->GCPtr < pCur->cb
564	&& ( uErr & X86_TRAP_PF_RW
565	\|\| pCur->enmType != PGMVIRTHANDLERTYPE_WRITE ) )
566	{
567	# ifdef IN_GC
568	STAM_PROFILE_START(&pCur->Stat, h);
569	rc = CTXSUFF(pCur->pfnHandler)(pVM, uErr, pRegFrame, pvFault, pCur->GCPtr, (RTGCUINTPTR)pvFault - (RTGCUINTPTR)pCur->GCPtr);
570	STAM_PROFILE_STOP(&pCur->Stat, h);
571	# else
572	rc = VINF_EM_RAW_EMULATE_INSTR; /** @todo for VMX */
573	# endif
574	STAM_COUNTER_INC(&pVM->pgm.s.StatHandlersVirtualUnmarked);
575	STAM_PROFILE_STOP(&pVM->pgm.s.StatHandlers, b);
576	STAM_STATS({ pVM->pgm.s.CTXSUFF(pStatTrap0eAttribution) = &pVM->pgm.s.StatTrap0eHndVirt; });
577	return rc;
578	}
579	}
580	}
581	# endif /* PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE) */
582	}
583	else
584	{
585	/* When the guest accesses invalid physical memory (e.g. probing of RAM or accessing a remapped MMIO range), then we'll fall
586	* back to the recompiler to emulate the instruction.
587	*/
588	LogFlow(("pgmPhysGetPageEx %VGp failed with %Vrc\n", GCPhys, rc));
589	STAM_COUNTER_INC(&pVM->pgm.s.StatHandlersInvalid);
590	STAM_PROFILE_STOP(&pVM->pgm.s.StatHandlers, b);
591	return VINF_EM_RAW_EMULATE_INSTR;
592	}
593
594	STAM_PROFILE_STOP(&pVM->pgm.s.StatHandlers, b);
595
596	# ifdef PGM_OUT_OF_SYNC_IN_GC
597	/*
598	* We are here only if page is present in Guest page tables and trap is not handled
599	* by our handlers.
600	* Check it for page out-of-sync situation.
601	*/
602	STAM_PROFILE_START(&pVM->pgm.s.StatOutOfSync, c);
603
604	if (!(uErr & X86_TRAP_PF_P))
605	{
606	/*
607	* Page is not present in our page tables.
608	* Try to sync it!
609	* BTW, fPageShw is invalid in this branch!
610	*/
611	if (uErr & X86_TRAP_PF_US)
612	STAM_COUNTER_INC(&pVM->pgm.s.StatGCPageOutOfSyncUser);
613	else /* supervisor */
614	STAM_COUNTER_INC(&pVM->pgm.s.StatGCPageOutOfSyncSupervisor);
615
616	# if defined(LOG_ENABLED) && !defined(IN_RING0)
617	RTGCPHYS GCPhys;
618	uint64_t fPageGst;
619	PGMGstGetPage(pVM, pvFault, &fPageGst, &GCPhys);
620	Log(("Page out of sync: %VGv eip=%08x PdeSrc.n.u1User=%d fPageGst=%08llx GCPhys=%VGp scan=%d\n",
621	pvFault, pRegFrame->eip, PdeSrc.n.u1User, fPageGst, GCPhys, CSAMDoesPageNeedScanning(pVM, (RTRCPTR)pRegFrame->eip)));
622	# endif /* LOG_ENABLED */
623
624	# if PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE) && !defined(IN_RING0)
625	if (CPUMGetGuestCPL(pVM, pRegFrame) == 0)
626	{
627	uint64_t fPageGst;
628	rc = PGMGstGetPage(pVM, pvFault, &fPageGst, NULL);
629	if ( VBOX_SUCCESS(rc)
630	&& !(fPageGst & X86_PTE_US))
631	{
632	/* Note: can't check for X86_TRAP_ID bit, because that requires execute disable support on the CPU */
633	if ( pvFault == (RTGCPTR)pRegFrame->eip
634	\|\| (RTGCUINTPTR)pvFault - pRegFrame->eip < 8 /* instruction crossing a page boundary */
635	# ifdef CSAM_DETECT_NEW_CODE_PAGES
636	\|\| ( !PATMIsPatchGCAddr(pVM, (RTGCPTR)pRegFrame->eip)
637	&& CSAMDoesPageNeedScanning(pVM, (RTRCPTR)pRegFrame->eip)) /* any new code we encounter here */
638	# endif /* CSAM_DETECT_NEW_CODE_PAGES */
639	)
640	{
641	LogFlow(("CSAMExecFault %VGv\n", pRegFrame->eip));
642	rc = CSAMExecFault(pVM, (RTRCPTR)pRegFrame->eip);
643	if (rc != VINF_SUCCESS)
644	{
645	/*
646	* CSAM needs to perform a job in ring 3.
647	*
648	* Sync the page before going to the host context; otherwise we'll end up in a loop if
649	* CSAM fails (e.g. instruction crosses a page boundary and the next page is not present)
650	*/
651	LogFlow(("CSAM ring 3 job\n"));
652	int rc2 = PGM_BTH_NAME(SyncPage)(pVM, PdeSrc, (RTGCUINTPTR)pvFault, 1, uErr);
653	AssertRC(rc2);
654
655	STAM_PROFILE_STOP(&pVM->pgm.s.StatOutOfSync, c);
656	STAM_STATS({ pVM->pgm.s.CTXSUFF(pStatTrap0eAttribution) = &pVM->pgm.s.StatTrap0eCSAM; });
657	return rc;
658	}
659	}
660	# ifdef CSAM_DETECT_NEW_CODE_PAGES
661	else
662	if ( uErr == X86_TRAP_PF_RW
663	&& pRegFrame->ecx >= 0x100 /* early check for movswd count */
664	&& pRegFrame->ecx < 0x10000
665	)
666	{
667	/* In case of a write to a non-present supervisor shadow page, we'll take special precautions
668	* to detect loading of new code pages.
669	*/
670
671	/*
672	* Decode the instruction.
673	*/
674	RTGCPTR PC;
675	rc = SELMValidateAndConvertCSAddr(pVM, pRegFrame->eflags, pRegFrame->ss, pRegFrame->cs, &pRegFrame->csHid, (RTGCPTR)pRegFrame->eip, &PC);
676	if (rc == VINF_SUCCESS)
677	{
678	DISCPUSTATE Cpu;
679	uint32_t cbOp;
680	rc = EMInterpretDisasOneEx(pVM, (RTGCUINTPTR)PC, pRegFrame, &Cpu, &cbOp);
681
682	/* For now we'll restrict this to rep movsw/d instructions */
683	if ( rc == VINF_SUCCESS
684	&& Cpu.pCurInstr->opcode == OP_MOVSWD
685	&& (Cpu.prefix & PREFIX_REP))
686	{
687	CSAMMarkPossibleCodePage(pVM, pvFault);
688	}
689	}
690	}
691	# endif /* CSAM_DETECT_NEW_CODE_PAGES */
692
693	/*
694	* Mark this page as safe.
695	*/
696	/** @todo not correct for pages that contain both code and data!! */
697	Log2(("CSAMMarkPage %VGv; scanned=%d\n", pvFault, true));
698	CSAMMarkPage(pVM, (RTRCPTR)pvFault, true);
699	}
700	}
701	# endif /* PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE) && !defined(IN_RING0) */
702	rc = PGM_BTH_NAME(SyncPage)(pVM, PdeSrc, (RTGCUINTPTR)pvFault, PGM_SYNC_NR_PAGES, uErr);
703	if (VBOX_SUCCESS(rc))
704	{
705	/* The page was successfully synced, return to the guest. */
706	STAM_PROFILE_STOP(&pVM->pgm.s.StatOutOfSync, c);
707	STAM_STATS({ pVM->pgm.s.CTXSUFF(pStatTrap0eAttribution) = &pVM->pgm.s.StatTrap0eOutOfSync; });
708	return VINF_SUCCESS;
709	}
710	}
711	else
712	{
713	/*
714	* A side effect of not flushing global PDEs are out of sync pages due
715	* to physical monitored regions, that are no longer valid.
716	* Assume for now it only applies to the read/write flag
717	*/
718	if (VBOX_SUCCESS(rc) && (uErr & X86_TRAP_PF_RW))
719	{
720	if (uErr & X86_TRAP_PF_US)
721	STAM_COUNTER_INC(&pVM->pgm.s.StatGCPageOutOfSyncUser);
722	else /* supervisor */
723	STAM_COUNTER_INC(&pVM->pgm.s.StatGCPageOutOfSyncSupervisor);
724
725
726	/*
727	* Note: Do NOT use PGM_SYNC_NR_PAGES here. That only works if the page is not present, which is not true in this case.
728	*/
729	rc = PGM_BTH_NAME(SyncPage)(pVM, PdeSrc, (RTGCUINTPTR)pvFault, 1, uErr);
730	if (VBOX_SUCCESS(rc))
731	{
732	/*
733	* Page was successfully synced, return to guest.
734	*/
735	# ifdef VBOX_STRICT
736	RTGCPHYS GCPhys;
737	uint64_t fPageGst;
738	rc = PGMGstGetPage(pVM, pvFault, &fPageGst, &GCPhys);
739	Assert(VBOX_SUCCESS(rc) && fPageGst & X86_PTE_RW);
740	LogFlow(("Obsolete physical monitor page out of sync %VGv - phys %VGp flags=%08llx\n", pvFault, GCPhys, (uint64_t)fPageGst));
741
742	uint64_t fPageShw;
743	rc = PGMShwGetPage(pVM, pvFault, &fPageShw, NULL);
744	AssertMsg(VBOX_SUCCESS(rc) && fPageShw & X86_PTE_RW, ("rc=%Vrc fPageShw=%VX64\n", rc, fPageShw));
745	# endif /* VBOX_STRICT */
746	STAM_PROFILE_STOP(&pVM->pgm.s.StatOutOfSync, c);
747	STAM_STATS({ pVM->pgm.s.CTXSUFF(pStatTrap0eAttribution) = &pVM->pgm.s.StatTrap0eOutOfSyncObsHnd; });
748	return VINF_SUCCESS;
749	}
750
751	/* Check to see if we need to emulate the instruction as X86_CR0_WP has been cleared. */
752	if ( CPUMGetGuestCPL(pVM, pRegFrame) == 0
753	&& ((CPUMGetGuestCR0(pVM) & (X86_CR0_WP\|X86_CR0_PG)) == X86_CR0_PG)
754	&& (uErr & (X86_TRAP_PF_RW \| X86_TRAP_PF_P)) == (X86_TRAP_PF_RW \| X86_TRAP_PF_P))
755	{
756	uint64_t fPageGst;
757	rc = PGMGstGetPage(pVM, pvFault, &fPageGst, NULL);
758	if ( VBOX_SUCCESS(rc)
759	&& !(fPageGst & X86_PTE_RW))
760	{
761	rc = PGMInterpretInstruction(pVM, pRegFrame, pvFault);
762	if (VBOX_SUCCESS(rc))
763	STAM_COUNTER_INC(&pVM->pgm.s.StatTrap0eWPEmulGC);
764	else
765	STAM_COUNTER_INC(&pVM->pgm.s.StatTrap0eWPEmulR3);
766	return rc;
767	}
768	else
769	AssertMsgFailed(("Unexpected r/w page %x flag=%x\n", pvFault, (uint32_t)fPageGst));
770	}
771
772	}
773
774	# if PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE)
775	# ifdef VBOX_STRICT
776	/*
777	* Check for VMM page flags vs. Guest page flags consistency.
778	* Currently only for debug purposes.
779	*/
780	if (VBOX_SUCCESS(rc))
781	{
782	/* Get guest page flags. */
783	uint64_t fPageGst;
784	rc = PGMGstGetPage(pVM, pvFault, &fPageGst, NULL);
785	if (VBOX_SUCCESS(rc))
786	{
787	uint64_t fPageShw;
788	rc = PGMShwGetPage(pVM, pvFault, &fPageShw, NULL);
789
790	/*
791	* Compare page flags.
792	* Note: we have AVL, A, D bits desynched.
793	*/
794	AssertMsg((fPageShw & ~(X86_PTE_A \| X86_PTE_D \| X86_PTE_AVL_MASK)) == (fPageGst & ~(X86_PTE_A \| X86_PTE_D \| X86_PTE_AVL_MASK)),
795	("Page flags mismatch! pvFault=%VGv GCPhys=%VGp fPageShw=%08llx fPageGst=%08llx\n", pvFault, GCPhys, fPageShw, fPageGst));
796	}
797	else
798	AssertMsgFailed(("PGMGstGetPage rc=%Vrc\n", rc));
799	}
800	else
801	AssertMsgFailed(("PGMGCGetPage rc=%Vrc\n", rc));
802	# endif /* VBOX_STRICT */
803	# endif /* PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE) */
804	}
805	STAM_PROFILE_STOP(&pVM->pgm.s.StatOutOfSync, c);
806	# endif /* PGM_OUT_OF_SYNC_IN_GC */
807	}
808	else
809	{
810	/*
811	* Page not present in Guest OS or invalid page table address.
812	* This is potential virtual page access handler food.
813	*
814	* For the present we'll say that our access handlers don't
815	* work for this case - we've already discarded the page table
816	* not present case which is identical to this.
817	*
818	* When we perchance find we need this, we will probably have AVL
819	* trees (offset based) to operate on and we can measure their speed
820	* agains mapping a page table and probably rearrange this handling
821	* a bit. (Like, searching virtual ranges before checking the
822	* physical address.)
823	*/
824	}
825	}
826
827
828	# if PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE)
829	/*
830	* Conclusion, this is a guest trap.
831	*/
832	LogFlow(("PGM: Unhandled #PF -> route trap to recompiler!\n"));
833	STAM_COUNTER_INC(&pVM->pgm.s.StatGCTrap0eUnhandled);
834	return VINF_EM_RAW_GUEST_TRAP;
835	# else
836	/* present, but not a monitored page; perhaps the guest is probing physical memory */
837	return VINF_EM_RAW_EMULATE_INSTR;
838	# endif /* PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE) */
839
840
841	#else /* PGM_GST_TYPE != PGM_TYPE_32BIT */
842
843	AssertReleaseMsgFailed(("Shw=%d Gst=%d is not implemented!\n", PGM_GST_TYPE, PGM_SHW_TYPE));
844	return VERR_INTERNAL_ERROR;
845	#endif /* PGM_GST_TYPE != PGM_TYPE_32BIT */
846	}
847
848
849	/**
850	* Emulation of the invlpg instruction.
851	*
852	*
853	* @returns VBox status code.
854	*
855	* @param pVM VM handle.
856	* @param GCPtrPage Page to invalidate.
857	*
858	* @remark ASSUMES that the guest is updating before invalidating. This order
859	* isn't required by the CPU, so this is speculative and could cause
860	* trouble.
861	*
862	* @todo Flush page or page directory only if necessary!
863	* @todo Add a #define for simply invalidating the page.
864	*/
865	PGM_BTH_DECL(int, InvalidatePage)(PVM pVM, RTGCUINTPTR GCPtrPage)
866	{
867	#if PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE) \
868	&& PGM_SHW_TYPE != PGM_TYPE_NESTED \
869	&& PGM_SHW_TYPE != PGM_TYPE_EPT
870	int rc;
871
872	LogFlow(("InvalidatePage %VGv\n", GCPtrPage));
873	/*
874	* Get the shadow PD entry and skip out if this PD isn't present.
875	* (Guessing that it is frequent for a shadow PDE to not be present, do this first.)
876	*/
877	# if PGM_SHW_TYPE == PGM_TYPE_32BIT
878	const unsigned iPDDst = GCPtrPage >> SHW_PD_SHIFT;
879	PX86PDE pPdeDst = &pVM->pgm.s.CTXMID(p,32BitPD)->a[iPDDst];
880	# elif PGM_SHW_TYPE == PGM_TYPE_PAE
881	const unsigned iPDDst = GCPtrPage >> SHW_PD_SHIFT; /* no mask; flat index into the 2048 entry array. */
882	const unsigned iPdpte = (GCPtrPage >> X86_PDPT_SHIFT); NOREF(iPdpte);
883	PX86PDEPAE pPdeDst = &pVM->pgm.s.CTXMID(ap,PaePDs[0])->a[iPDDst];
884	PX86PDPT pPdptDst = pVM->pgm.s.CTXMID(p,PaePDPT); NOREF(pPdptDst);
885
886	/* If the shadow PDPE isn't present, then skip the invalidate. */
887	if (!pPdptDst->a[iPdpte].n.u1Present)
888	{
889	Assert(!(pPdptDst->a[iPdpte].u & PGM_PLXFLAGS_MAPPING));
890	STAM_COUNTER_INC(&pVM->pgm.s.CTXMID(Stat,InvalidatePageSkipped));
891	return VINF_SUCCESS;
892	}
893
894	# else /* PGM_SHW_TYPE == PGM_TYPE_AMD64 */
895	/* PML4 */
896	AssertReturn(pVM->pgm.s.pHCPaePML4, VERR_INTERNAL_ERROR);
897
898	const unsigned iPml4e = (GCPtrPage >> X86_PML4_SHIFT) & X86_PML4_MASK;
899	const unsigned iPdpte = (GCPtrPage >> X86_PDPT_SHIFT) & X86_PDPT_MASK_AMD64;
900	const unsigned iPDDst = (GCPtrPage >> SHW_PD_SHIFT) & SHW_PD_MASK;
901	PX86PDPAE pPDDst;
902	PX86PDPT pPdptDst;
903	PX86PML4E pPml4eDst = &pVM->pgm.s.pHCPaePML4->a[iPml4e];
904	rc = PGMShwGetLongModePDPtr(pVM, GCPtrPage, &pPdptDst, &pPDDst);
905	if (rc != VINF_SUCCESS)
906	{
907	AssertMsg(rc == VERR_PAGE_DIRECTORY_PTR_NOT_PRESENT \|\| rc == VERR_PAGE_MAP_LEVEL4_NOT_PRESENT, ("Unexpected rc=%Vrc\n", rc));
908	STAM_COUNTER_INC(&pVM->pgm.s.CTXMID(Stat,InvalidatePageSkipped));
909	if (!VM_FF_ISSET(pVM, VM_FF_PGM_SYNC_CR3))
910	PGM_INVL_GUEST_TLBS();
911	return VINF_SUCCESS;
912	}
913	Assert(pPDDst);
914
915	PX86PDEPAE pPdeDst = &pPDDst->a[iPDDst];
916	PX86PDPE pPdpeDst = &pPdptDst->a[iPdpte];
917
918	if (!pPdpeDst->n.u1Present)
919	{
920	STAM_COUNTER_INC(&pVM->pgm.s.CTXMID(Stat,InvalidatePageSkipped));
921	if (!VM_FF_ISSET(pVM, VM_FF_PGM_SYNC_CR3))
922	PGM_INVL_GUEST_TLBS();
923	return VINF_SUCCESS;
924	}
925
926	# endif /* PGM_SHW_TYPE == PGM_TYPE_AMD64 */
927
928	const SHWPDE PdeDst = *pPdeDst;
929	if (!PdeDst.n.u1Present)
930	{
931	STAM_COUNTER_INC(&pVM->pgm.s.CTXMID(Stat,InvalidatePageSkipped));
932	return VINF_SUCCESS;
933	}
934
935	/*
936	* Get the guest PD entry and calc big page.
937	*/
938	# if PGM_GST_TYPE == PGM_TYPE_32BIT
939	PX86PD pPDSrc = CTXSUFF(pVM->pgm.s.pGuestPD);
940	const unsigned iPDSrc = GCPtrPage >> GST_PD_SHIFT;
941	GSTPDE PdeSrc = pPDSrc->a[iPDSrc];
942	# else /* PGM_GST_TYPE != PGM_TYPE_32BIT */
943	unsigned iPDSrc;
944	# if PGM_GST_TYPE == PGM_TYPE_PAE
945	PX86PDPAE pPDSrc = pgmGstGetPaePDPtr(&pVM->pgm.s, GCPtrPage, &iPDSrc);
946	X86PDPE PdpeSrc = CTXSUFF(pVM->pgm.s.pGstPaePDPT)->a[iPdpte];
947	# else /* AMD64 */
948	PX86PML4E pPml4eSrc;
949	X86PDPE PdpeSrc;
950	PX86PDPAE pPDSrc = pgmGstGetLongModePDPtr(&pVM->pgm.s, GCPtrPage, &pPml4eSrc, &PdpeSrc, &iPDSrc);
951	# endif
952	GSTPDE PdeSrc;
953
954	if (pPDSrc)
955	PdeSrc = pPDSrc->a[iPDSrc];
956	else
957	PdeSrc.u = 0;
958	# endif /* PGM_GST_TYPE != PGM_TYPE_32BIT */
959
960	# if PGM_GST_TYPE == PGM_TYPE_AMD64
961	const bool fIsBigPage = PdeSrc.b.u1Size;
962	# else
963	const bool fIsBigPage = PdeSrc.b.u1Size && (CPUMGetGuestCR4(pVM) & X86_CR4_PSE);
964	# endif
965
966	# ifdef IN_RING3
967	/*
968	* If a CR3 Sync is pending we may ignore the invalidate page operation
969	* depending on the kind of sync and if it's a global page or not.
970	* This doesn't make sense in GC/R0 so we'll skip it entirely there.
971	*/
972	# ifdef PGM_SKIP_GLOBAL_PAGEDIRS_ON_NONGLOBAL_FLUSH
973	if ( VM_FF_ISSET(pVM, VM_FF_PGM_SYNC_CR3)
974	\|\| ( VM_FF_ISSET(pVM, VM_FF_PGM_SYNC_CR3_NON_GLOBAL)
975	&& fIsBigPage
976	&& PdeSrc.b.u1Global
977	)
978	)
979	# else
980	if (VM_FF_ISPENDING(pVM, VM_FF_PGM_SYNC_CR3 \| VM_FF_PGM_SYNC_CR3_NON_GLOBAL) )
981	# endif
982	{
983	STAM_COUNTER_INC(&pVM->pgm.s.StatHCInvalidatePageSkipped);
984	return VINF_SUCCESS;
985	}
986	# endif /* IN_RING3 */
987
988	# if PGM_GST_TYPE == PGM_TYPE_AMD64
989	PPGMPOOL pPool = pVM->pgm.s.CTXSUFF(pPool);
990
991	/* Fetch the pgm pool shadow descriptor. */
992	PPGMPOOLPAGE pShwPdpt = pgmPoolGetPageByHCPhys(pVM, pPml4eDst->u & X86_PML4E_PG_MASK);
993	Assert(pShwPdpt);
994
995	/* Fetch the pgm pool shadow descriptor. */
996	PPGMPOOLPAGE pShwPde = pgmPoolGetPageByHCPhys(pVM, pPdptDst->a[iPdpte].u & SHW_PDPE_PG_MASK);
997	Assert(pShwPde);
998
999	Assert(pPml4eDst->n.u1Present && (pPml4eDst->u & SHW_PDPT_MASK));
1000	RTGCPHYS GCPhysPdpt = pPml4eSrc->u & X86_PML4E_PG_MASK;
1001
1002	if ( !pPml4eSrc->n.u1Present
1003	\|\| pShwPdpt->GCPhys != GCPhysPdpt)
1004	{
1005	LogFlow(("InvalidatePage: Out-of-sync PML4E (P/GCPhys) at %VGv GCPhys=%VGp vs %VGp Pml4eSrc=%RX64 Pml4eDst=%RX64\n",
1006	GCPtrPage, pShwPdpt->GCPhys, GCPhysPdpt, (uint64_t)pPml4eSrc->u, (uint64_t)pPml4eDst->u));
1007	pgmPoolFreeByPage(pPool, pShwPdpt, pVM->pgm.s.pHCShwAmd64CR3->idx, iPml4e);
1008	pPml4eDst->u = 0;
1009	STAM_COUNTER_INC(&pVM->pgm.s.CTXMID(Stat,InvalidatePagePDNPs));
1010	PGM_INVL_GUEST_TLBS();
1011	return VINF_SUCCESS;
1012	}
1013	if ( pPml4eSrc->n.u1User != pPml4eDst->n.u1User
1014	\|\| (!pPml4eSrc->n.u1Write && pPml4eDst->n.u1Write))
1015	{
1016	/*
1017	* Mark not present so we can resync the PML4E when it's used.
1018	*/
1019	LogFlow(("InvalidatePage: Out-of-sync PML4E at %VGv Pml4eSrc=%RX64 Pml4eDst=%RX64\n",
1020	GCPtrPage, (uint64_t)pPml4eSrc->u, (uint64_t)pPml4eDst->u));
1021	pgmPoolFreeByPage(pPool, pShwPdpt, pVM->pgm.s.pHCShwAmd64CR3->idx, iPml4e);
1022	pPml4eDst->u = 0;
1023	STAM_COUNTER_INC(&pVM->pgm.s.CTXMID(Stat,InvalidatePagePDOutOfSync));
1024	PGM_INVL_GUEST_TLBS();
1025	}
1026	else if (!pPml4eSrc->n.u1Accessed)
1027	{
1028	/*
1029	* Mark not present so we can set the accessed bit.
1030	*/
1031	LogFlow(("InvalidatePage: Out-of-sync PML4E (A) at %VGv Pml4eSrc=%RX64 Pml4eDst=%RX64\n",
1032	GCPtrPage, (uint64_t)pPml4eSrc->u, (uint64_t)pPml4eDst->u));
1033	pgmPoolFreeByPage(pPool, pShwPdpt, pVM->pgm.s.pHCShwAmd64CR3->idx, iPml4e);
1034	pPml4eDst->u = 0;
1035	STAM_COUNTER_INC(&pVM->pgm.s.CTXMID(Stat,InvalidatePagePDNAs));
1036	PGM_INVL_GUEST_TLBS();
1037	}
1038
1039	/* Check if the PDPT entry has changed. */
1040	Assert(pPdpeDst->n.u1Present && pPdpeDst->u & SHW_PDPT_MASK);
1041	RTGCPHYS GCPhysPd = PdpeSrc.u & GST_PDPE_PG_MASK;
1042	if ( !PdpeSrc.n.u1Present
1043	\|\| pShwPde->GCPhys != GCPhysPd)
1044	{
1045	LogFlow(("InvalidatePage: Out-of-sync PDPE (P/GCPhys) at %VGv GCPhys=%VGp vs %VGp PdpeSrc=%RX64 PdpeDst=%RX64\n",
1046	GCPtrPage, pShwPde->GCPhys, GCPhysPd, (uint64_t)PdpeSrc.u, (uint64_t)pPdpeDst->u));
1047	pgmPoolFreeByPage(pPool, pShwPde, pShwPdpt->idx, iPdpte);
1048	pPdpeDst->u = 0;
1049	STAM_COUNTER_INC(&pVM->pgm.s.CTXMID(Stat,InvalidatePagePDNPs));
1050	PGM_INVL_GUEST_TLBS();
1051	return VINF_SUCCESS;
1052	}
1053	if ( PdpeSrc.lm.u1User != pPdpeDst->lm.u1User
1054	\|\| (!PdpeSrc.lm.u1Write && pPdpeDst->lm.u1Write))
1055	{
1056	/*
1057	* Mark not present so we can resync the PDPTE when it's used.
1058	*/
1059	LogFlow(("InvalidatePage: Out-of-sync PDPE at %VGv PdpeSrc=%RX64 PdpeDst=%RX64\n",
1060	GCPtrPage, (uint64_t)PdpeSrc.u, (uint64_t)pPdpeDst->u));
1061	pgmPoolFreeByPage(pPool, pShwPde, pShwPdpt->idx, iPdpte);
1062	pPdpeDst->u = 0;
1063	STAM_COUNTER_INC(&pVM->pgm.s.CTXMID(Stat,InvalidatePagePDOutOfSync));
1064	PGM_INVL_GUEST_TLBS();
1065	}
1066	else if (!PdpeSrc.lm.u1Accessed)
1067	{
1068	/*
1069	* Mark not present so we can set the accessed bit.
1070	*/
1071	LogFlow(("InvalidatePage: Out-of-sync PDPE (A) at %VGv PdpeSrc=%RX64 PdpeDst=%RX64\n",
1072	GCPtrPage, (uint64_t)PdpeSrc.u, (uint64_t)pPdpeDst->u));
1073	pgmPoolFreeByPage(pPool, pShwPde, pShwPdpt->idx, iPdpte);
1074	pPdpeDst->u = 0;
1075	STAM_COUNTER_INC(&pVM->pgm.s.CTXMID(Stat,InvalidatePagePDNAs));
1076	PGM_INVL_GUEST_TLBS();
1077	}
1078	# endif /* PGM_GST_TYPE == PGM_TYPE_AMD64 */
1079
1080	# if PGM_GST_TYPE == PGM_TYPE_PAE
1081	/* Note: This shouldn't actually be necessary as we monitor the PDPT page for changes. */
1082	if (!pPDSrc)
1083	{
1084	/* Guest PDPE not present */
1085	PX86PDPAE pPDPAE = pVM->pgm.s.CTXMID(ap,PaePDs)[0]; /* root of the 2048 PDE array */
1086	PX86PDEPAE pPDEDst = &pPDPAE->a[iPdpte * X86_PG_PAE_ENTRIES];
1087	PPGMPOOL pPool = pVM->pgm.s.CTXSUFF(pPool);
1088
1089	Assert(!(CTXSUFF(pVM->pgm.s.pGstPaePDPT)->a[iPdpte].n.u1Present));
1090	LogFlow(("InvalidatePage: guest PDPE %d not present; clear shw pdpe\n", iPdpte));
1091	/* for each page directory entry */
1092	for (unsigned iPD = 0; iPD < X86_PG_PAE_ENTRIES; iPD++)
1093	{
1094	if ( pPDEDst[iPD].n.u1Present
1095	&& !(pPDEDst[iPD].u & PGM_PDFLAGS_MAPPING))
1096	{
1097	pgmPoolFreeByPage(pPool, pgmPoolGetPage(pPool, pPDEDst[iPD].u & SHW_PDE_PG_MASK), SHW_POOL_ROOT_IDX, iPdpte * X86_PG_PAE_ENTRIES + iPD);
1098	pPDEDst[iPD].u = 0;
1099	}
1100	}
1101	if (!(pPdptDst->a[iPdpte].u & PGM_PLXFLAGS_MAPPING))
1102	pPdptDst->a[iPdpte].n.u1Present = 0;
1103	PGM_INVL_GUEST_TLBS();
1104	}
1105	AssertMsg(pVM->pgm.s.fMappingsFixed \|\| (PdpeSrc.u & X86_PDPE_PG_MASK) == pVM->pgm.s.aGCPhysGstPaePDsMonitored[iPdpte], ("%VGp vs %VGp (mon)\n", (PdpeSrc.u & X86_PDPE_PG_MASK), pVM->pgm.s.aGCPhysGstPaePDsMonitored[iPdpte]));
1106	# endif
1107
1108
1109	/*
1110	* Deal with the Guest PDE.
1111	*/
1112	rc = VINF_SUCCESS;
1113	if (PdeSrc.n.u1Present)
1114	{
1115	if (PdeDst.u & PGM_PDFLAGS_MAPPING)
1116	{
1117	/*
1118	* Conflict - Let SyncPT deal with it to avoid duplicate code.
1119	*/
1120	Assert(pgmMapAreMappingsEnabled(&pVM->pgm.s));
1121	Assert(PGMGetGuestMode(pVM) <= PGMMODE_PAE);
1122	rc = PGM_BTH_NAME(SyncPT)(pVM, iPDSrc, pPDSrc, GCPtrPage);
1123	}
1124	else if ( PdeSrc.n.u1User != PdeDst.n.u1User
1125	\|\| (!PdeSrc.n.u1Write && PdeDst.n.u1Write))
1126	{
1127	/*
1128	* Mark not present so we can resync the PDE when it's used.
1129	*/
1130	LogFlow(("InvalidatePage: Out-of-sync at %VGp PdeSrc=%RX64 PdeDst=%RX64\n",
1131	GCPtrPage, (uint64_t)PdeSrc.u, (uint64_t)PdeDst.u));
1132	# if PGM_GST_TYPE == PGM_TYPE_AMD64
1133	pgmPoolFree(pVM, PdeDst.u & SHW_PDE_PG_MASK, pShwPde->idx, iPDDst);
1134	# else
1135	pgmPoolFree(pVM, PdeDst.u & SHW_PDE_PG_MASK, SHW_POOL_ROOT_IDX, iPDDst);
1136	# endif
1137	pPdeDst->u = 0;
1138	STAM_COUNTER_INC(&pVM->pgm.s.CTXMID(Stat,InvalidatePagePDOutOfSync));
1139	PGM_INVL_GUEST_TLBS();
1140	}
1141	else if (!PdeSrc.n.u1Accessed)
1142	{
1143	/*
1144	* Mark not present so we can set the accessed bit.
1145	*/
1146	LogFlow(("InvalidatePage: Out-of-sync (A) at %VGp PdeSrc=%RX64 PdeDst=%RX64\n",
1147	GCPtrPage, (uint64_t)PdeSrc.u, (uint64_t)PdeDst.u));
1148	# if PGM_GST_TYPE == PGM_TYPE_AMD64
1149	pgmPoolFree(pVM, PdeDst.u & SHW_PDE_PG_MASK, pShwPde->idx, iPDDst);
1150	# else
1151	pgmPoolFree(pVM, PdeDst.u & SHW_PDE_PG_MASK, SHW_POOL_ROOT_IDX, iPDDst);
1152	# endif
1153	pPdeDst->u = 0;
1154	STAM_COUNTER_INC(&pVM->pgm.s.CTXMID(Stat,InvalidatePagePDNAs));
1155	PGM_INVL_GUEST_TLBS();
1156	}
1157	else if (!fIsBigPage)
1158	{
1159	/*
1160	* 4KB - page.
1161	*/
1162	PPGMPOOLPAGE pShwPage = pgmPoolGetPageByHCPhys(pVM, PdeDst.u & SHW_PDE_PG_MASK);
1163	RTGCPHYS GCPhys = PdeSrc.u & GST_PDE_PG_MASK;
1164	# if PGM_SHW_TYPE == PGM_TYPE_PAE && PGM_GST_TYPE == PGM_TYPE_32BIT
1165	/* Select the right PDE as we're emulating a 4kb page table with 2 shadow page tables. */
1166	GCPhys \|= (iPDDst & 1) * (PAGE_SIZE/2);
1167	# endif
1168	if (pShwPage->GCPhys == GCPhys)
1169	{
1170	# if 0 /* likely cause of a major performance regression; must be SyncPageWorkerTrackDeref then */
1171	const unsigned iPTEDst = (GCPtrPage >> SHW_PT_SHIFT) & SHW_PT_MASK;
1172	PSHWPT pPT = (PSHWPT)PGMPOOL_PAGE_2_PTR(pVM, pShwPage);
1173	if (pPT->a[iPTEDst].n.u1Present)
1174	{
1175	# ifdef PGMPOOL_WITH_USER_TRACKING
1176	/* This is very unlikely with caching/monitoring enabled. */
1177	PGM_BTH_NAME(SyncPageWorkerTrackDeref)(pVM, pShwPage, pPT->a[iPTEDst].u & SHW_PTE_PG_MASK);
1178	# endif
1179	pPT->a[iPTEDst].u = 0;
1180	}
1181	# else /* Syncing it here isn't 100% safe and it's probably not worth spending time syncing it. */
1182	rc = PGM_BTH_NAME(SyncPage)(pVM, PdeSrc, GCPtrPage, 1, 0);
1183	if (VBOX_SUCCESS(rc))
1184	rc = VINF_SUCCESS;
1185	# endif
1186	STAM_COUNTER_INC(&pVM->pgm.s.CTXMID(Stat,InvalidatePage4KBPages));
1187	PGM_INVL_PG(GCPtrPage);
1188	}
1189	else
1190	{
1191	/*
1192	* The page table address changed.
1193	*/
1194	LogFlow(("InvalidatePage: Out-of-sync at %VGp PdeSrc=%RX64 PdeDst=%RX64 ShwGCPhys=%VGp iPDDst=%#x\n",
1195	GCPtrPage, (uint64_t)PdeSrc.u, (uint64_t)PdeDst.u, pShwPage->GCPhys, iPDDst));
1196	# if PGM_GST_TYPE == PGM_TYPE_AMD64
1197	pgmPoolFree(pVM, PdeDst.u & SHW_PDE_PG_MASK, pShwPde->idx, iPDDst);
1198	# else
1199	pgmPoolFree(pVM, PdeDst.u & SHW_PDE_PG_MASK, SHW_POOL_ROOT_IDX, iPDDst);
1200	# endif
1201	pPdeDst->u = 0;
1202	STAM_COUNTER_INC(&pVM->pgm.s.CTXMID(Stat,InvalidatePagePDOutOfSync));
1203	PGM_INVL_GUEST_TLBS();
1204	}
1205	}
1206	else
1207	{
1208	/*
1209	* 2/4MB - page.
1210	*/
1211	/* Before freeing the page, check if anything really changed. */
1212	PPGMPOOLPAGE pShwPage = pgmPoolGetPageByHCPhys(pVM, PdeDst.u & SHW_PDE_PG_MASK);
1213	RTGCPHYS GCPhys = GST_GET_PDE_BIG_PG_GCPHYS(PdeSrc);
1214	# if PGM_SHW_TYPE == PGM_TYPE_PAE && PGM_GST_TYPE == PGM_TYPE_32BIT
1215	/* Select the right PDE as we're emulating a 4MB page directory with two 2 MB shadow PDEs.*/
1216	GCPhys \|= GCPtrPage & (1 << X86_PD_PAE_SHIFT);
1217	# endif
1218	if ( pShwPage->GCPhys == GCPhys
1219	&& pShwPage->enmKind == BTH_PGMPOOLKIND_PT_FOR_BIG)
1220	{
1221	/* ASSUMES a the given bits are identical for 4M and normal PDEs */
1222	/** @todo PAT */
1223	if ( (PdeSrc.u & (X86_PDE_P \| X86_PDE_RW \| X86_PDE_US \| X86_PDE_PWT \| X86_PDE_PCD))
1224	== (PdeDst.u & (X86_PDE_P \| X86_PDE_RW \| X86_PDE_US \| X86_PDE_PWT \| X86_PDE_PCD))
1225	&& ( PdeSrc.b.u1Dirty /** @todo rainy day: What about read-only 4M pages? not very common, but still... */
1226	\|\| (PdeDst.u & PGM_PDFLAGS_TRACK_DIRTY)))
1227	{
1228	LogFlow(("Skipping flush for big page containing %VGv (PD=%X .u=%VX64)-> nothing has changed!\n", GCPtrPage, iPDSrc, PdeSrc.u));
1229	STAM_COUNTER_INC(&pVM->pgm.s.CTXMID(Stat,InvalidatePage4MBPagesSkip));
1230	return VINF_SUCCESS;
1231	}
1232	}
1233
1234	/*
1235	* Ok, the page table is present and it's been changed in the guest.
1236	* If we're in host context, we'll just mark it as not present taking the lazy approach.
1237	* We could do this for some flushes in GC too, but we need an algorithm for
1238	* deciding which 4MB pages containing code likely to be executed very soon.
1239	*/
1240	LogFlow(("InvalidatePage: Out-of-sync PD at %VGp PdeSrc=%RX64 PdeDst=%RX64\n",
1241	GCPtrPage, (uint64_t)PdeSrc.u, (uint64_t)PdeDst.u));
1242	# if PGM_GST_TYPE == PGM_TYPE_AMD64
1243	pgmPoolFree(pVM, PdeDst.u & SHW_PDE_PG_MASK, pShwPde->idx, iPDDst);
1244	# else
1245	pgmPoolFree(pVM, PdeDst.u & SHW_PDE_PG_MASK, SHW_POOL_ROOT_IDX, iPDDst);
1246	# endif
1247	pPdeDst->u = 0;
1248	STAM_COUNTER_INC(&pVM->pgm.s.CTXMID(Stat,InvalidatePage4MBPages));
1249	PGM_INVL_BIG_PG(GCPtrPage);
1250	}
1251	}
1252	else
1253	{
1254	/*
1255	* Page directory is not present, mark shadow PDE not present.
1256	*/
1257	if (!(PdeDst.u & PGM_PDFLAGS_MAPPING))
1258	{
1259	# if PGM_GST_TYPE == PGM_TYPE_AMD64
1260	pgmPoolFree(pVM, PdeDst.u & SHW_PDE_PG_MASK, pShwPde->idx, iPDDst);
1261	# else
1262	pgmPoolFree(pVM, PdeDst.u & SHW_PDE_PG_MASK, SHW_POOL_ROOT_IDX, iPDDst);
1263	# endif
1264	pPdeDst->u = 0;
1265	STAM_COUNTER_INC(&pVM->pgm.s.CTXMID(Stat,InvalidatePagePDNPs));
1266	PGM_INVL_PG(GCPtrPage);
1267	}
1268	else
1269	{
1270	Assert(pgmMapAreMappingsEnabled(&pVM->pgm.s));
1271	STAM_COUNTER_INC(&pVM->pgm.s.CTXMID(Stat,InvalidatePagePDMappings));
1272	}
1273	}
1274
1275	return rc;
1276
1277	#else /* guest real and protected mode */
1278	/* There's no such thing as InvalidatePage when paging is disabled, so just ignore. */
1279	return VINF_SUCCESS;
1280	#endif
1281	}
1282
1283
1284	#ifdef PGMPOOL_WITH_USER_TRACKING
1285	/**
1286	* Update the tracking of shadowed pages.
1287	*
1288	* @param pVM The VM handle.
1289	* @param pShwPage The shadow page.
1290	* @param HCPhys The physical page we is being dereferenced.
1291	*/
1292	DECLINLINE(void) PGM_BTH_NAME(SyncPageWorkerTrackDeref)(PVM pVM, PPGMPOOLPAGE pShwPage, RTHCPHYS HCPhys)
1293	{
1294	# ifdef PGMPOOL_WITH_GCPHYS_TRACKING
1295	STAM_PROFILE_START(&pVM->pgm.s.StatTrackDeref, a);
1296	LogFlow(("SyncPageWorkerTrackDeref: Damn HCPhys=%VHp pShwPage->idx=%#x!!!\n", HCPhys, pShwPage->idx));
1297
1298	/** @todo If this turns out to be a bottle neck (very likely) two things can be done:
1299	* 1. have a medium sized HCPhys -> GCPhys TLB (hash?)
1300	* 2. write protect all shadowed pages. I.e. implement caching.
1301	*/
1302	/*
1303	* Find the guest address.
1304	*/
1305	for (PPGMRAMRANGE pRam = CTXALLSUFF(pVM->pgm.s.pRamRanges);
1306	pRam;
1307	pRam = CTXALLSUFF(pRam->pNext))
1308	{
1309	unsigned iPage = pRam->cb >> PAGE_SHIFT;
1310	while (iPage-- > 0)
1311	{
1312	if (PGM_PAGE_GET_HCPHYS(&pRam->aPages[iPage]) == HCPhys)
1313	{
1314	PPGMPOOL pPool = pVM->pgm.s.CTXSUFF(pPool);
1315	pgmTrackDerefGCPhys(pPool, pShwPage, &pRam->aPages[iPage]);
1316	pShwPage->cPresent--;
1317	pPool->cPresent--;
1318	STAM_PROFILE_STOP(&pVM->pgm.s.StatTrackDeref, a);
1319	return;
1320	}
1321	}
1322	}
1323
1324	for (;;)
1325	AssertReleaseMsgFailed(("HCPhys=%VHp wasn't found!\n", HCPhys));
1326	# else /* !PGMPOOL_WITH_GCPHYS_TRACKING */
1327	pShwPage->cPresent--;
1328	pVM->pgm.s.CTXSUFF(pPool)->cPresent--;
1329	# endif /* !PGMPOOL_WITH_GCPHYS_TRACKING */
1330	}
1331
1332
1333	/**
1334	* Update the tracking of shadowed pages.
1335	*
1336	* @param pVM The VM handle.
1337	* @param pShwPage The shadow page.
1338	* @param u16 The top 16-bit of the pPage->HCPhys.
1339	* @param pPage Pointer to the guest page. this will be modified.
1340	* @param iPTDst The index into the shadow table.
1341	*/
1342	DECLINLINE(void) PGM_BTH_NAME(SyncPageWorkerTrackAddref)(PVM pVM, PPGMPOOLPAGE pShwPage, uint16_t u16, PPGMPAGE pPage, const unsigned iPTDst)
1343	{
1344	# ifdef PGMPOOL_WITH_GCPHYS_TRACKING
1345	/*
1346	* We're making certain assumptions about the placement of cRef and idx.
1347	*/
1348	Assert(MM_RAM_FLAGS_IDX_SHIFT == 48);
1349	Assert(MM_RAM_FLAGS_CREFS_SHIFT > MM_RAM_FLAGS_IDX_SHIFT);
1350
1351	/*
1352	* Just deal with the simple first time here.
1353	*/
1354	if (!u16)
1355	{
1356	STAM_COUNTER_INC(&pVM->pgm.s.StatTrackVirgin);
1357	u16 = (1 << (MM_RAM_FLAGS_CREFS_SHIFT - MM_RAM_FLAGS_IDX_SHIFT)) \| pShwPage->idx;
1358	}
1359	else
1360	u16 = pgmPoolTrackPhysExtAddref(pVM, u16, pShwPage->idx);
1361
1362	/* write back, trying to be clever... */
1363	Log2(("SyncPageWorkerTrackAddRef: u16=%#x pPage->HCPhys=%VHp->%VHp iPTDst=%#x\n",
1364	u16, pPage->HCPhys, (pPage->HCPhys & MM_RAM_FLAGS_NO_REFS_MASK) \| ((uint64_t)u16 << MM_RAM_FLAGS_CREFS_SHIFT), iPTDst));
1365	((uint16_t )&pPage->HCPhys + 3) = u16; /** @todo PAGE FLAGS */
1366	# endif /* PGMPOOL_WITH_GCPHYS_TRACKING */
1367
1368	/* update statistics. */
1369	pVM->pgm.s.CTXSUFF(pPool)->cPresent++;
1370	pShwPage->cPresent++;
1371	if (pShwPage->iFirstPresent > iPTDst)
1372	pShwPage->iFirstPresent = iPTDst;
1373	}
1374	#endif /* PGMPOOL_WITH_USER_TRACKING */
1375
1376
1377	/**
1378	* Creates a 4K shadow page for a guest page.
1379	*
1380	* For 4M pages the caller must convert the PDE4M to a PTE, this includes adjusting the
1381	* physical address. The PdeSrc argument only the flags are used. No page structured
1382	* will be mapped in this function.
1383	*
1384	* @param pVM VM handle.
1385	* @param pPteDst Destination page table entry.
1386	* @param PdeSrc Source page directory entry (i.e. Guest OS page directory entry).
1387	* Can safely assume that only the flags are being used.
1388	* @param PteSrc Source page table entry (i.e. Guest OS page table entry).
1389	* @param pShwPage Pointer to the shadow page.
1390	* @param iPTDst The index into the shadow table.
1391	*
1392	* @remark Not used for 2/4MB pages!
1393	*/
1394	DECLINLINE(void) PGM_BTH_NAME(SyncPageWorker)(PVM pVM, PSHWPTE pPteDst, GSTPDE PdeSrc, GSTPTE PteSrc, PPGMPOOLPAGE pShwPage, unsigned iPTDst)
1395	{
1396	if (PteSrc.n.u1Present)
1397	{
1398	/*
1399	* Find the ram range.
1400	*/
1401	PPGMPAGE pPage;
1402	int rc = pgmPhysGetPageEx(&pVM->pgm.s, PteSrc.u & GST_PTE_PG_MASK, &pPage);
1403	if (VBOX_SUCCESS(rc))
1404	{
1405	/** @todo investiage PWT, PCD and PAT. */
1406	/*
1407	* Make page table entry.
1408	*/
1409	const RTHCPHYS HCPhys = pPage->HCPhys; /** @todo FLAGS */
1410	SHWPTE PteDst;
1411	if (PGM_PAGE_HAS_ACTIVE_HANDLERS(pPage))
1412	{
1413	/** @todo r=bird: Are we actually handling dirty and access bits for pages with access handlers correctly? No. */
1414	if (!PGM_PAGE_HAS_ACTIVE_ALL_HANDLERS(pPage))
1415	{
1416	#if PGM_SHW_TYPE == PGM_TYPE_EPT
1417	PteDst.u = (HCPhys & EPT_PTE_PG_MASK);
1418	PteDst.n.u1Present = 1;
1419	PteDst.n.u1Execute = 1;
1420	/* PteDst.n.u1Write = 0 && PteDst.n.u1Big = 0 */
1421	#else
1422	PteDst.u = (PteSrc.u & ~(X86_PTE_PAE_PG_MASK \| X86_PTE_AVL_MASK \| X86_PTE_PAT \| X86_PTE_PCD \| X86_PTE_PWT \| X86_PTE_RW))
1423	\| (HCPhys & X86_PTE_PAE_PG_MASK);
1424	#endif
1425	}
1426	else
1427	{
1428	LogFlow(("SyncPageWorker: monitored page (%VGp) -> mark not present\n", HCPhys));
1429	PteDst.u = 0;
1430	}
1431	/** @todo count these two kinds. */
1432	}
1433	else
1434	{
1435	#if PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE)
1436	/*
1437	* If the page or page directory entry is not marked accessed,
1438	* we mark the page not present.
1439	*/
1440	if (!PteSrc.n.u1Accessed \|\| !PdeSrc.n.u1Accessed)
1441	{
1442	LogFlow(("SyncPageWorker: page and or page directory not accessed -> mark not present\n"));
1443	STAM_COUNTER_INC(&pVM->pgm.s.CTXMID(Stat,AccessedPage));
1444	PteDst.u = 0;
1445	}
1446	else
1447	/*
1448	* If the page is not flagged as dirty and is writable, then make it read-only, so we can set the dirty bit
1449	* when the page is modified.
1450	*/
1451	if (!PteSrc.n.u1Dirty && (PdeSrc.n.u1Write & PteSrc.n.u1Write))
1452	{
1453	STAM_COUNTER_INC(&pVM->pgm.s.CTXMID(Stat,DirtyPage));
1454	PteDst.u = (PteSrc.u & ~(X86_PTE_PAE_PG_MASK \| X86_PTE_AVL_MASK \| X86_PTE_PAT \| X86_PTE_PCD \| X86_PTE_PWT \| X86_PTE_RW))
1455	\| (HCPhys & X86_PTE_PAE_PG_MASK)
1456	\| PGM_PTFLAGS_TRACK_DIRTY;
1457	}
1458	else
1459	#endif
1460	{
1461	STAM_COUNTER_INC(&pVM->pgm.s.CTXMID(Stat,DirtyPageSkipped));
1462	#if PGM_SHW_TYPE == PGM_TYPE_EPT
1463	PteDst.u = (HCPhys & EPT_PTE_PG_MASK);
1464	PteDst.n.u1Present = 1;
1465	PteDst.n.u1Write = 1;
1466	PteDst.n.u1Execute = 1;
1467	/* PteDst.n.u1Big = 0 */
1468	#else
1469	PteDst.u = (PteSrc.u & ~(X86_PTE_PAE_PG_MASK \| X86_PTE_AVL_MASK \| X86_PTE_PAT \| X86_PTE_PCD \| X86_PTE_PWT))
1470	\| (HCPhys & X86_PTE_PAE_PG_MASK);
1471	#endif
1472	}
1473	}
1474
1475	#ifdef PGMPOOL_WITH_USER_TRACKING
1476	/*
1477	* Keep user track up to date.
1478	*/
1479	if (PteDst.n.u1Present)
1480	{
1481	if (!pPteDst->n.u1Present)
1482	PGM_BTH_NAME(SyncPageWorkerTrackAddref)(pVM, pShwPage, HCPhys >> MM_RAM_FLAGS_IDX_SHIFT, pPage, iPTDst);
1483	else if ((pPteDst->u & SHW_PTE_PG_MASK) != (PteDst.u & SHW_PTE_PG_MASK))
1484	{
1485	Log2(("SyncPageWorker: deref! *pPteDst=%RX64 PteDst=%RX64\n", (uint64_t)pPteDst->u, (uint64_t)PteDst.u));
1486	PGM_BTH_NAME(SyncPageWorkerTrackDeref)(pVM, pShwPage, pPteDst->u & SHW_PTE_PG_MASK);
1487	PGM_BTH_NAME(SyncPageWorkerTrackAddref)(pVM, pShwPage, HCPhys >> MM_RAM_FLAGS_IDX_SHIFT, pPage, iPTDst);
1488	}
1489	}
1490	else if (pPteDst->n.u1Present)
1491	{
1492	Log2(("SyncPageWorker: deref! *pPteDst=%RX64\n", (uint64_t)pPteDst->u));
1493	PGM_BTH_NAME(SyncPageWorkerTrackDeref)(pVM, pShwPage, pPteDst->u & SHW_PTE_PG_MASK);
1494	}
1495	#endif /* PGMPOOL_WITH_USER_TRACKING */
1496
1497	/*
1498	* Update statistics and commit the entry.
1499	*/
1500	if (!PteSrc.n.u1Global)
1501	pShwPage->fSeenNonGlobal = true;
1502	*pPteDst = PteDst;
1503	}
1504	/* else MMIO or invalid page, we must handle them manually in the #PF handler. */
1505	/** @todo count these. */
1506	}
1507	else
1508	{
1509	/*
1510	* Page not-present.
1511	*/
1512	LogFlow(("SyncPageWorker: page not present in Pte\n"));
1513	#ifdef PGMPOOL_WITH_USER_TRACKING
1514	/* Keep user track up to date. */
1515	if (pPteDst->n.u1Present)
1516	{
1517	Log2(("SyncPageWorker: deref! *pPteDst=%RX64\n", (uint64_t)pPteDst->u));
1518	PGM_BTH_NAME(SyncPageWorkerTrackDeref)(pVM, pShwPage, pPteDst->u & SHW_PTE_PG_MASK);
1519	}
1520	#endif /* PGMPOOL_WITH_USER_TRACKING */
1521	pPteDst->u = 0;
1522	/** @todo count these. */
1523	}
1524	}
1525
1526
1527	/**
1528	* Syncs a guest OS page.
1529	*
1530	* There are no conflicts at this point, neither is there any need for
1531	* page table allocations.
1532	*
1533	* @returns VBox status code.
1534	* @returns VINF_PGM_SYNCPAGE_MODIFIED_PDE if it modifies the PDE in any way.
1535	* @param pVM VM handle.
1536	* @param PdeSrc Page directory entry of the guest.
1537	* @param GCPtrPage Guest context page address.
1538	* @param cPages Number of pages to sync (PGM_SYNC_N_PAGES) (default=1).
1539	* @param uErr Fault error (X86_TRAP_PF_*).
1540	*/
1541	PGM_BTH_DECL(int, SyncPage)(PVM pVM, GSTPDE PdeSrc, RTGCUINTPTR GCPtrPage, unsigned cPages, unsigned uErr)
1542	{
1543	LogFlow(("SyncPage: GCPtrPage=%VGv cPages=%d uErr=%#x\n", GCPtrPage, cPages, uErr));
1544
1545	#if ( PGM_GST_TYPE == PGM_TYPE_32BIT \
1546	\|\| PGM_GST_TYPE == PGM_TYPE_PAE \
1547	\|\| PGM_GST_TYPE == PGM_TYPE_AMD64) \
1548	&& PGM_SHW_TYPE != PGM_TYPE_NESTED \
1549	&& PGM_SHW_TYPE != PGM_TYPE_EPT
1550
1551	# if PGM_WITH_NX(PGM_GST_TYPE, PGM_SHW_TYPE)
1552	bool fNoExecuteBitValid = !!(CPUMGetGuestEFER(pVM) & MSR_K6_EFER_NXE);
1553	# endif
1554
1555	/*
1556	* Assert preconditions.
1557	*/
1558	STAM_COUNTER_INC(&pVM->pgm.s.StatGCSyncPagePD[(GCPtrPage >> GST_PD_SHIFT) & GST_PD_MASK]);
1559	Assert(PdeSrc.n.u1Present);
1560	Assert(cPages);
1561
1562	/*
1563	* Get the shadow PDE, find the shadow page table in the pool.
1564	*/
1565	# if PGM_SHW_TYPE == PGM_TYPE_32BIT
1566	const unsigned iPDDst = GCPtrPage >> SHW_PD_SHIFT;
1567	X86PDE PdeDst = pVM->pgm.s.CTXMID(p,32BitPD)->a[iPDDst];
1568	# elif PGM_SHW_TYPE == PGM_TYPE_PAE
1569	const unsigned iPDDst = GCPtrPage >> SHW_PD_SHIFT;
1570	const unsigned iPdpte = (GCPtrPage >> X86_PDPT_SHIFT); NOREF(iPdpte); /* no mask; flat index into the 2048 entry array. */
1571	PX86PDPT pPdptDst = pVM->pgm.s.CTXMID(p,PaePDPT); NOREF(pPdptDst);
1572	X86PDEPAE PdeDst = pVM->pgm.s.CTXMID(ap,PaePDs)[0]->a[iPDDst];
1573	# elif PGM_SHW_TYPE == PGM_TYPE_AMD64
1574	const unsigned iPDDst = ((GCPtrPage >> SHW_PD_SHIFT) & SHW_PD_MASK);
1575	const unsigned iPdpte = (GCPtrPage >> X86_PDPT_SHIFT) & X86_PDPT_MASK_AMD64;
1576	PX86PDPAE pPDDst;
1577	X86PDEPAE PdeDst;
1578	PX86PDPT pPdptDst;
1579
1580	int rc = PGMShwGetLongModePDPtr(pVM, GCPtrPage, &pPdptDst, &pPDDst);
1581	AssertRCReturn(rc, rc);
1582	Assert(pPDDst && pPdptDst);
1583	PdeDst = pPDDst->a[iPDDst];
1584	# endif
1585	Assert(PdeDst.n.u1Present);
1586	PPGMPOOLPAGE pShwPage = pgmPoolGetPageByHCPhys(pVM, PdeDst.u & SHW_PDE_PG_MASK);
1587
1588	# if PGM_GST_TYPE == PGM_TYPE_AMD64
1589	/* Fetch the pgm pool shadow descriptor. */
1590	PPGMPOOLPAGE pShwPde = pgmPoolGetPageByHCPhys(pVM, pPdptDst->a[iPdpte].u & X86_PDPE_PG_MASK);
1591	Assert(pShwPde);
1592	# endif
1593
1594	/*
1595	* Check that the page is present and that the shadow PDE isn't out of sync.
1596	*/
1597	# if PGM_GST_TYPE == PGM_TYPE_AMD64
1598	const bool fBigPage = PdeSrc.b.u1Size;
1599	# else
1600	const bool fBigPage = PdeSrc.b.u1Size && (CPUMGetGuestCR4(pVM) & X86_CR4_PSE);
1601	# endif
1602	RTGCPHYS GCPhys;
1603	if (!fBigPage)
1604	{
1605	GCPhys = PdeSrc.u & GST_PDE_PG_MASK;
1606	# if PGM_SHW_TYPE == PGM_TYPE_PAE && PGM_GST_TYPE == PGM_TYPE_32BIT
1607	/* Select the right PDE as we're emulating a 4kb page table with 2 shadow page tables. */
1608	GCPhys \|= (iPDDst & 1) * (PAGE_SIZE/2);
1609	# endif
1610	}
1611	else
1612	{
1613	GCPhys = GST_GET_PDE_BIG_PG_GCPHYS(PdeSrc);
1614	# if PGM_SHW_TYPE == PGM_TYPE_PAE && PGM_GST_TYPE == PGM_TYPE_32BIT
1615	/* Select the right PDE as we're emulating a 4MB page directory with two 2 MB shadow PDEs.*/
1616	GCPhys \|= GCPtrPage & (1 << X86_PD_PAE_SHIFT);
1617	# endif
1618	}
1619	if ( pShwPage->GCPhys == GCPhys
1620	&& PdeSrc.n.u1Present
1621	&& (PdeSrc.n.u1User == PdeDst.n.u1User)
1622	&& (PdeSrc.n.u1Write == PdeDst.n.u1Write \|\| !PdeDst.n.u1Write)
1623	# if PGM_WITH_NX(PGM_GST_TYPE, PGM_SHW_TYPE)
1624	&& (!fNoExecuteBitValid \|\| PdeSrc.n.u1NoExecute == PdeDst.n.u1NoExecute)
1625	# endif
1626	)
1627	{
1628	/*
1629	* Check that the PDE is marked accessed already.
1630	* Since we set the accessed bit before getting here on a #PF, this
1631	* check is only meant for dealing with non-#PF'ing paths.
1632	*/
1633	if (PdeSrc.n.u1Accessed)
1634	{
1635	PSHWPT pPTDst = (PSHWPT)PGMPOOL_PAGE_2_PTR(pVM, pShwPage);
1636	if (!fBigPage)
1637	{
1638	/*
1639	* 4KB Page - Map the guest page table.
1640	*/
1641	PGSTPT pPTSrc;
1642	int rc = PGM_GCPHYS_2_PTR(pVM, PdeSrc.u & GST_PDE_PG_MASK, &pPTSrc);
1643	if (VBOX_SUCCESS(rc))
1644	{
1645	# ifdef PGM_SYNC_N_PAGES
1646	Assert(cPages == 1 \|\| !(uErr & X86_TRAP_PF_P));
1647	if (cPages > 1 && !(uErr & X86_TRAP_PF_P))
1648	{
1649	/*
1650	* This code path is currently only taken when the caller is PGMTrap0eHandler
1651	* for non-present pages!
1652	*
1653	* We're setting PGM_SYNC_NR_PAGES pages around the faulting page to sync it and
1654	* deal with locality.
1655	*/
1656	unsigned iPTDst = (GCPtrPage >> SHW_PT_SHIFT) & SHW_PT_MASK;
1657	# if PGM_SHW_TYPE == PGM_TYPE_PAE && PGM_GST_TYPE == PGM_TYPE_32BIT
1658	/* Select the right PDE as we're emulating a 4kb page table with 2 shadow page tables. */
1659	const unsigned offPTSrc = ((GCPtrPage >> SHW_PD_SHIFT) & 1) * 512;
1660	# else
1661	const unsigned offPTSrc = 0;
1662	# endif
1663	const unsigned iPTDstEnd = RT_MIN(iPTDst + PGM_SYNC_NR_PAGES / 2, RT_ELEMENTS(pPTDst->a));
1664	if (iPTDst < PGM_SYNC_NR_PAGES / 2)
1665	iPTDst = 0;
1666	else
1667	iPTDst -= PGM_SYNC_NR_PAGES / 2;
1668	for (; iPTDst < iPTDstEnd; iPTDst++)
1669	{
1670	if (!pPTDst->a[iPTDst].n.u1Present)
1671	{
1672	GSTPTE PteSrc = pPTSrc->a[offPTSrc + iPTDst];
1673	RTGCUINTPTR GCPtrCurPage = ((RTGCUINTPTR)GCPtrPage & ~(RTGCUINTPTR)(GST_PT_MASK << GST_PT_SHIFT)) \| ((offPTSrc + iPTDst) << PAGE_SHIFT);
1674	NOREF(GCPtrCurPage);
1675	#ifndef IN_RING0
1676	/*
1677	* Assuming kernel code will be marked as supervisor - and not as user level
1678	* and executed using a conforming code selector - And marked as readonly.
1679	* Also assume that if we're monitoring a page, it's of no interest to CSAM.
1680	*/
1681	PPGMPAGE pPage;
1682	if ( ((PdeSrc.u & PteSrc.u) & (X86_PTE_RW \| X86_PTE_US))
1683	\|\| iPTDst == ((GCPtrPage >> SHW_PT_SHIFT) & SHW_PT_MASK) /* always sync GCPtrPage */
1684	\|\| !CSAMDoesPageNeedScanning(pVM, (RTRCPTR)GCPtrCurPage)
1685	\|\| ( (pPage = pgmPhysGetPage(&pVM->pgm.s, PteSrc.u & GST_PTE_PG_MASK))
1686	&& PGM_PAGE_HAS_ACTIVE_HANDLERS(pPage))
1687	)
1688	#endif /* else: CSAM not active */
1689	PGM_BTH_NAME(SyncPageWorker)(pVM, &pPTDst->a[iPTDst], PdeSrc, PteSrc, pShwPage, iPTDst);
1690	Log2(("SyncPage: 4K+ %VGv PteSrc:{P=%d RW=%d U=%d raw=%08llx} PteDst=%08llx%s\n",
1691	GCPtrCurPage, PteSrc.n.u1Present,
1692	PteSrc.n.u1Write & PdeSrc.n.u1Write,
1693	PteSrc.n.u1User & PdeSrc.n.u1User,
1694	(uint64_t)PteSrc.u,
1695	(uint64_t)pPTDst->a[iPTDst].u,
1696	pPTDst->a[iPTDst].u & PGM_PTFLAGS_TRACK_DIRTY ? " Track-Dirty" : ""));
1697	}
1698	}
1699	}
1700	else
1701	# endif /* PGM_SYNC_N_PAGES */
1702	{
1703	const unsigned iPTSrc = (GCPtrPage >> GST_PT_SHIFT) & GST_PT_MASK;
1704	GSTPTE PteSrc = pPTSrc->a[iPTSrc];
1705	const unsigned iPTDst = (GCPtrPage >> SHW_PT_SHIFT) & SHW_PT_MASK;
1706	PGM_BTH_NAME(SyncPageWorker)(pVM, &pPTDst->a[iPTDst], PdeSrc, PteSrc, pShwPage, iPTDst);
1707	Log2(("SyncPage: 4K %VGv PteSrc:{P=%d RW=%d U=%d raw=%08llx}%s\n",
1708	GCPtrPage, PteSrc.n.u1Present,
1709	PteSrc.n.u1Write & PdeSrc.n.u1Write,
1710	PteSrc.n.u1User & PdeSrc.n.u1User,
1711	(uint64_t)PteSrc.u,
1712	pPTDst->a[iPTDst].u & PGM_PTFLAGS_TRACK_DIRTY ? " Track-Dirty" : ""));
1713	}
1714	}
1715	else /* MMIO or invalid page: emulated in #PF handler. */
1716	{
1717	LogFlow(("PGM_GCPHYS_2_PTR %VGp failed with %Vrc\n", GCPhys, rc));
1718	Assert(!pPTDst->a[(GCPtrPage >> SHW_PT_SHIFT) & SHW_PT_MASK].n.u1Present);
1719	}
1720	}
1721	else
1722	{
1723	/*
1724	* 4/2MB page - lazy syncing shadow 4K pages.
1725	* (There are many causes of getting here, it's no longer only CSAM.)
1726	*/
1727	/* Calculate the GC physical address of this 4KB shadow page. */
1728	RTGCPHYS GCPhys = GST_GET_PDE_BIG_PG_GCPHYS(PdeSrc) \| ((RTGCUINTPTR)GCPtrPage & GST_BIG_PAGE_OFFSET_MASK);
1729	/* Find ram range. */
1730	PPGMPAGE pPage;
1731	int rc = pgmPhysGetPageEx(&pVM->pgm.s, GCPhys, &pPage);
1732	if (VBOX_SUCCESS(rc))
1733	{
1734	/*
1735	* Make shadow PTE entry.
1736	*/
1737	const RTHCPHYS HCPhys = pPage->HCPhys; /** @todo PAGE FLAGS */
1738	SHWPTE PteDst;
1739	PteDst.u = (PdeSrc.u & ~(X86_PTE_PAE_PG_MASK \| X86_PTE_AVL_MASK \| X86_PTE_PAT \| X86_PTE_PCD \| X86_PTE_PWT))
1740	\| (HCPhys & X86_PTE_PAE_PG_MASK);
1741	if (PGM_PAGE_HAS_ACTIVE_HANDLERS(pPage))
1742	{
1743	if (!PGM_PAGE_HAS_ACTIVE_ALL_HANDLERS(pPage))
1744	PteDst.n.u1Write = 0;
1745	else
1746	PteDst.u = 0;
1747	}
1748	const unsigned iPTDst = (GCPtrPage >> SHW_PT_SHIFT) & SHW_PT_MASK;
1749	# ifdef PGMPOOL_WITH_USER_TRACKING
1750	if (PteDst.n.u1Present && !pPTDst->a[iPTDst].n.u1Present)
1751	PGM_BTH_NAME(SyncPageWorkerTrackAddref)(pVM, pShwPage, HCPhys >> MM_RAM_FLAGS_IDX_SHIFT, pPage, iPTDst);
1752	# endif
1753	pPTDst->a[iPTDst] = PteDst;
1754
1755
1756	/*
1757	* If the page is not flagged as dirty and is writable, then make it read-only
1758	* at PD level, so we can set the dirty bit when the page is modified.
1759	*
1760	* ASSUMES that page access handlers are implemented on page table entry level.
1761	* Thus we will first catch the dirty access and set PDE.D and restart. If
1762	* there is an access handler, we'll trap again and let it work on the problem.
1763	*/
1764	/** @todo r=bird: figure out why we need this here, SyncPT should've taken care of this already.
1765	* As for invlpg, it simply frees the whole shadow PT.
1766	* ...It's possibly because the guest clears it and the guest doesn't really tell us... */
1767	if (!PdeSrc.b.u1Dirty && PdeSrc.b.u1Write)
1768	{
1769	STAM_COUNTER_INC(&pVM->pgm.s.CTXMID(Stat,DirtyPageBig));
1770	PdeDst.u \|= PGM_PDFLAGS_TRACK_DIRTY;
1771	PdeDst.n.u1Write = 0;
1772	}
1773	else
1774	{
1775	PdeDst.au32[0] &= ~PGM_PDFLAGS_TRACK_DIRTY;
1776	PdeDst.n.u1Write = PdeSrc.n.u1Write;
1777	}
1778	# if PGM_SHW_TYPE == PGM_TYPE_32BIT
1779	pVM->pgm.s.CTXMID(p,32BitPD)->a[iPDDst] = PdeDst;
1780	# elif PGM_SHW_TYPE == PGM_TYPE_PAE
1781	pVM->pgm.s.CTXMID(ap,PaePDs)[0]->a[iPDDst] = PdeDst;
1782	# elif PGM_SHW_TYPE == PGM_TYPE_AMD64
1783	pPDDst->a[iPDDst] = PdeDst;
1784	# endif
1785	Log2(("SyncPage: BIG %VGv PdeSrc:{P=%d RW=%d U=%d raw=%08llx} GCPhys=%VGp%s\n",
1786	GCPtrPage, PdeSrc.n.u1Present, PdeSrc.n.u1Write, PdeSrc.n.u1User, (uint64_t)PdeSrc.u, GCPhys,
1787	PdeDst.u & PGM_PDFLAGS_TRACK_DIRTY ? " Track-Dirty" : ""));
1788	}
1789	else
1790	LogFlow(("PGM_GCPHYS_2_PTR %VGp (big) failed with %Vrc\n", GCPhys, rc));
1791	}
1792	return VINF_SUCCESS;
1793	}
1794	STAM_COUNTER_INC(&pVM->pgm.s.CTXMID(Stat,SyncPagePDNAs));
1795	}
1796	else
1797	{
1798	STAM_COUNTER_INC(&pVM->pgm.s.CTXMID(Stat,SyncPagePDOutOfSync));
1799	Log2(("SyncPage: Out-Of-Sync PDE at %VGp PdeSrc=%RX64 PdeDst=%RX64\n",
1800	GCPtrPage, (uint64_t)PdeSrc.u, (uint64_t)PdeDst.u));
1801	}
1802
1803	/*
1804	* Mark the PDE not present. Restart the instruction and let #PF call SyncPT.
1805	* Yea, I'm lazy.
1806	*/
1807	PPGMPOOL pPool = pVM->pgm.s.CTXSUFF(pPool);
1808	# if PGM_GST_TYPE == PGM_TYPE_AMD64
1809	pgmPoolFreeByPage(pPool, pShwPage, pShwPde->idx, iPDDst);
1810	# else
1811	pgmPoolFreeByPage(pPool, pShwPage, SHW_POOL_ROOT_IDX, iPDDst);
1812	# endif
1813
1814	# if PGM_SHW_TYPE == PGM_TYPE_32BIT
1815	pVM->pgm.s.CTXMID(p,32BitPD)->a[iPDDst].u = 0;
1816	# elif PGM_SHW_TYPE == PGM_TYPE_PAE
1817	pVM->pgm.s.CTXMID(ap,PaePDs)[0]->a[iPDDst].u = 0;
1818	# elif PGM_SHW_TYPE == PGM_TYPE_AMD64
1819	pPDDst->a[iPDDst].u = 0;
1820	# endif
1821	PGM_INVL_GUEST_TLBS();
1822	return VINF_PGM_SYNCPAGE_MODIFIED_PDE;
1823
1824	#elif (PGM_GST_TYPE == PGM_TYPE_REAL \|\| PGM_GST_TYPE == PGM_TYPE_PROT) \
1825	&& PGM_SHW_TYPE != PGM_TYPE_NESTED \
1826	&& (PGM_SHW_TYPE != PGM_TYPE_EPT \|\| PGM_GST_TYPE == PGM_TYPE_PROT)
1827
1828	# ifdef PGM_SYNC_N_PAGES
1829	/*
1830	* Get the shadow PDE, find the shadow page table in the pool.
1831	*/
1832	# if PGM_SHW_TYPE == PGM_TYPE_32BIT
1833	const unsigned iPDDst = GCPtrPage >> SHW_PD_SHIFT;
1834	X86PDE PdeDst = pVM->pgm.s.CTXMID(p,32BitPD)->a[iPDDst];
1835	# elif PGM_SHW_TYPE == PGM_TYPE_PAE
1836	const unsigned iPDDst = GCPtrPage >> SHW_PD_SHIFT; /* no mask; flat index into the 2048 entry array. */
1837	X86PDEPAE PdeDst = pVM->pgm.s.CTXMID(ap,PaePDs)[0]->a[iPDDst];
1838	# elif PGM_SHW_TYPE == PGM_TYPE_AMD64
1839	const unsigned iPDDst = ((GCPtrPage >> SHW_PD_SHIFT) & SHW_PD_MASK);
1840	const unsigned iPdpte = (GCPtrPage >> X86_PDPT_SHIFT) & X86_PDPT_MASK_AMD64; NOREF(iPdpte);
1841	PX86PDPAE pPDDst;
1842	X86PDEPAE PdeDst;
1843	PX86PDPT pPdptDst;
1844
1845	int rc = PGMShwGetLongModePDPtr(pVM, GCPtrPage, &pPdptDst, &pPDDst);
1846	AssertRCReturn(rc, rc);
1847	Assert(pPDDst && pPdptDst);
1848	PdeDst = pPDDst->a[iPDDst];
1849	# elif PGM_SHW_TYPE == PGM_TYPE_EPT
1850	const unsigned iPDDst = ((GCPtrPage >> SHW_PD_SHIFT) & SHW_PD_MASK);
1851	PEPTPD pPDDst;
1852	EPTPDE PdeDst;
1853
1854	int rc = PGMShwGetEPTPDPtr(pVM, GCPtrPage, NULL, &pPDDst);
1855	AssertRCReturn(rc, rc);
1856	Assert(pPDDst);
1857	PdeDst = pPDDst->a[iPDDst];
1858	# endif
1859	Assert(PdeDst.n.u1Present);
1860	PPGMPOOLPAGE pShwPage = pgmPoolGetPageByHCPhys(pVM, PdeDst.u & SHW_PDE_PG_MASK);
1861	PSHWPT pPTDst = (PSHWPT)PGMPOOL_PAGE_2_PTR(pVM, pShwPage);
1862
1863	Assert(cPages == 1 \|\| !(uErr & X86_TRAP_PF_P));
1864	if (cPages > 1 && !(uErr & X86_TRAP_PF_P))
1865	{
1866	/*
1867	* This code path is currently only taken when the caller is PGMTrap0eHandler
1868	* for non-present pages!
1869	*
1870	* We're setting PGM_SYNC_NR_PAGES pages around the faulting page to sync it and
1871	* deal with locality.
1872	*/
1873	unsigned iPTDst = (GCPtrPage >> SHW_PT_SHIFT) & SHW_PT_MASK;
1874	const unsigned iPTDstEnd = RT_MIN(iPTDst + PGM_SYNC_NR_PAGES / 2, RT_ELEMENTS(pPTDst->a));
1875	if (iPTDst < PGM_SYNC_NR_PAGES / 2)
1876	iPTDst = 0;
1877	else
1878	iPTDst -= PGM_SYNC_NR_PAGES / 2;
1879	for (; iPTDst < iPTDstEnd; iPTDst++)
1880	{
1881	if (!pPTDst->a[iPTDst].n.u1Present)
1882	{
1883	GSTPTE PteSrc;
1884
1885	RTGCUINTPTR GCPtrCurPage = ((RTGCUINTPTR)GCPtrPage & ~(RTGCUINTPTR)(SHW_PT_MASK << SHW_PT_SHIFT)) \| (iPTDst << PAGE_SHIFT);
1886
1887	/* Fake the page table entry */
1888	PteSrc.u = GCPtrCurPage;
1889	PteSrc.n.u1Present = 1;
1890	PteSrc.n.u1Dirty = 1;
1891	PteSrc.n.u1Accessed = 1;
1892	PteSrc.n.u1Write = 1;
1893	PteSrc.n.u1User = 1;
1894
1895	PGM_BTH_NAME(SyncPageWorker)(pVM, &pPTDst->a[iPTDst], PdeSrc, PteSrc, pShwPage, iPTDst);
1896
1897	Log2(("SyncPage: 4K+ %VGv PteSrc:{P=%d RW=%d U=%d raw=%08llx} PteDst=%08llx%s\n",
1898	GCPtrCurPage, PteSrc.n.u1Present,
1899	PteSrc.n.u1Write & PdeSrc.n.u1Write,
1900	PteSrc.n.u1User & PdeSrc.n.u1User,
1901	(uint64_t)PteSrc.u,
1902	(uint64_t)pPTDst->a[iPTDst].u,
1903	pPTDst->a[iPTDst].u & PGM_PTFLAGS_TRACK_DIRTY ? " Track-Dirty" : ""));
1904	}
1905	else
1906	Log4(("%VGv iPTDst=%x pPTDst->a[iPTDst] %RX64\n", ((RTGCUINTPTR)GCPtrPage & ~(RTGCUINTPTR)(SHW_PT_MASK << SHW_PT_SHIFT)) \| (iPTDst << PAGE_SHIFT), iPTDst, pPTDst->a[iPTDst].u));
1907	}
1908	}
1909	else
1910	# endif /* PGM_SYNC_N_PAGES */
1911	{
1912	GSTPTE PteSrc;
1913	const unsigned iPTDst = (GCPtrPage >> SHW_PT_SHIFT) & SHW_PT_MASK;
1914	RTGCUINTPTR GCPtrCurPage = ((RTGCUINTPTR)GCPtrPage & ~(RTGCUINTPTR)(SHW_PT_MASK << SHW_PT_SHIFT)) \| (iPTDst << PAGE_SHIFT);
1915
1916	/* Fake the page table entry */
1917	PteSrc.u = GCPtrCurPage;
1918	PteSrc.n.u1Present = 1;
1919	PteSrc.n.u1Dirty = 1;
1920	PteSrc.n.u1Accessed = 1;
1921	PteSrc.n.u1Write = 1;
1922	PteSrc.n.u1User = 1;
1923	PGM_BTH_NAME(SyncPageWorker)(pVM, &pPTDst->a[iPTDst], PdeSrc, PteSrc, pShwPage, iPTDst);
1924
1925	Log2(("SyncPage: 4K %VGv PteSrc:{P=%d RW=%d U=%d raw=%08llx}PteDst=%08llx%s\n",
1926	GCPtrPage, PteSrc.n.u1Present,
1927	PteSrc.n.u1Write & PdeSrc.n.u1Write,
1928	PteSrc.n.u1User & PdeSrc.n.u1User,
1929	(uint64_t)PteSrc.u,
1930	(uint64_t)pPTDst->a[iPTDst].u,
1931	pPTDst->a[iPTDst].u & PGM_PTFLAGS_TRACK_DIRTY ? " Track-Dirty" : ""));
1932	}
1933	return VINF_SUCCESS;
1934
1935	#else
1936	AssertReleaseMsgFailed(("Shw=%d Gst=%d is not implemented!\n", PGM_GST_TYPE, PGM_SHW_TYPE));
1937	return VERR_INTERNAL_ERROR;
1938	#endif
1939	}
1940
1941
1942
1943	#if PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE)
1944
1945	/**
1946	* Investigate page fault and handle write protection page faults caused by
1947	* dirty bit tracking.
1948	*
1949	* @returns VBox status code.
1950	* @param pVM VM handle.
1951	* @param uErr Page fault error code.
1952	* @param pPdeDst Shadow page directory entry.
1953	* @param pPdeSrc Guest page directory entry.
1954	* @param GCPtrPage Guest context page address.
1955	*/
1956	PGM_BTH_DECL(int, CheckPageFault)(PVM pVM, uint32_t uErr, PSHWPDE pPdeDst, PGSTPDE pPdeSrc, RTGCUINTPTR GCPtrPage)
1957	{
1958	bool fWriteProtect = !!(CPUMGetGuestCR0(pVM) & X86_CR0_WP);
1959	bool fUserLevelFault = !!(uErr & X86_TRAP_PF_US);
1960	bool fWriteFault = !!(uErr & X86_TRAP_PF_RW);
1961	# if PGM_GST_TYPE == PGM_TYPE_AMD64
1962	bool fBigPagesSupported = true;
1963	# else
1964	bool fBigPagesSupported = !!(CPUMGetGuestCR4(pVM) & X86_CR4_PSE);
1965	# endif
1966	# if PGM_WITH_NX(PGM_GST_TYPE, PGM_SHW_TYPE)
1967	bool fNoExecuteBitValid = !!(CPUMGetGuestEFER(pVM) & MSR_K6_EFER_NXE);
1968	# endif
1969	unsigned uPageFaultLevel;
1970	int rc;
1971
1972	STAM_PROFILE_START(&pVM->pgm.s.CTXMID(Stat, DirtyBitTracking), a);
1973	LogFlow(("CheckPageFault: GCPtrPage=%VGv uErr=%#x PdeSrc=%08x\n", GCPtrPage, uErr, pPdeSrc->u));
1974
1975	# if PGM_GST_TYPE == PGM_TYPE_PAE \
1976	\|\| PGM_GST_TYPE == PGM_TYPE_AMD64
1977
1978	# if PGM_GST_TYPE == PGM_TYPE_AMD64
1979	PX86PML4E pPml4eSrc;
1980	PX86PDPE pPdpeSrc;
1981
1982	pPdpeSrc = pgmGstGetLongModePDPTPtr(&pVM->pgm.s, GCPtrPage, &pPml4eSrc);
1983	Assert(pPml4eSrc);
1984
1985	/*
1986	* Real page fault? (PML4E level)
1987	*/
1988	if ( (uErr & X86_TRAP_PF_RSVD)
1989	\|\| !pPml4eSrc->n.u1Present
1990	\|\| (fNoExecuteBitValid && (uErr & X86_TRAP_PF_ID) && pPml4eSrc->n.u1NoExecute)
1991	\|\| (fWriteFault && !pPml4eSrc->n.u1Write && (fUserLevelFault \|\| fWriteProtect))
1992	\|\| (fUserLevelFault && !pPml4eSrc->n.u1User)
1993	)
1994	{
1995	uPageFaultLevel = 0;
1996	goto UpperLevelPageFault;
1997	}
1998	Assert(pPdpeSrc);
1999
2000	# else /* PAE */
2001	PX86PDPE pPdpeSrc = &pVM->pgm.s.CTXSUFF(pGstPaePDPT)->a[(GCPtrPage >> GST_PDPT_SHIFT) & GST_PDPT_MASK];
2002	# endif
2003
2004	/*
2005	* Real page fault? (PDPE level)
2006	*/
2007	if ( (uErr & X86_TRAP_PF_RSVD)
2008	\|\| !pPdpeSrc->n.u1Present
2009	# if PGM_GST_TYPE == PGM_TYPE_AMD64 /* NX, r/w, u/s bits in the PDPE are long mode only */
2010	\|\| (fNoExecuteBitValid && (uErr & X86_TRAP_PF_ID) && pPdpeSrc->lm.u1NoExecute)
2011	\|\| (fWriteFault && !pPdpeSrc->lm.u1Write && (fUserLevelFault \|\| fWriteProtect))
2012	\|\| (fUserLevelFault && !pPdpeSrc->lm.u1User)
2013	# endif
2014	)
2015	{
2016	uPageFaultLevel = 1;
2017	goto UpperLevelPageFault;
2018	}
2019	# endif
2020
2021	/*
2022	* Real page fault? (PDE level)
2023	*/
2024	if ( (uErr & X86_TRAP_PF_RSVD)
2025	\|\| !pPdeSrc->n.u1Present
2026	# if PGM_WITH_NX(PGM_GST_TYPE, PGM_SHW_TYPE)
2027	\|\| (fNoExecuteBitValid && (uErr & X86_TRAP_PF_ID) && pPdeSrc->n.u1NoExecute)
2028	# endif
2029	\|\| (fWriteFault && !pPdeSrc->n.u1Write && (fUserLevelFault \|\| fWriteProtect))
2030	\|\| (fUserLevelFault && !pPdeSrc->n.u1User) )
2031	{
2032	uPageFaultLevel = 2;
2033	goto UpperLevelPageFault;
2034	}
2035
2036	/*
2037	* First check the easy case where the page directory has been marked read-only to track
2038	* the dirty bit of an emulated BIG page
2039	*/
2040	if (pPdeSrc->b.u1Size && fBigPagesSupported)
2041	{
2042	/* Mark guest page directory as accessed */
2043	# if PGM_GST_TYPE == PGM_TYPE_AMD64
2044	pPml4eSrc->n.u1Accessed = 1;
2045	pPdpeSrc->lm.u1Accessed = 1;
2046	# endif
2047	pPdeSrc->b.u1Accessed = 1;
2048
2049	/*
2050	* Only write protection page faults are relevant here.
2051	*/
2052	if (fWriteFault)
2053	{
2054	/* Mark guest page directory as dirty (BIG page only). */
2055	pPdeSrc->b.u1Dirty = 1;
2056
2057	if (pPdeDst->n.u1Present && (pPdeDst->u & PGM_PDFLAGS_TRACK_DIRTY))
2058	{
2059	STAM_COUNTER_INC(&pVM->pgm.s.CTXMID(Stat,DirtyPageTrap));
2060
2061	Assert(pPdeSrc->b.u1Write);
2062
2063	pPdeDst->n.u1Write = 1;
2064	pPdeDst->n.u1Accessed = 1;
2065	pPdeDst->au32[0] &= ~PGM_PDFLAGS_TRACK_DIRTY;
2066	PGM_INVL_BIG_PG(GCPtrPage);
2067	STAM_PROFILE_STOP(&pVM->pgm.s.CTXMID(Stat,DirtyBitTracking), a);
2068	return VINF_PGM_HANDLED_DIRTY_BIT_FAULT;
2069	}
2070	}
2071	STAM_PROFILE_STOP(&pVM->pgm.s.CTXMID(Stat,DirtyBitTracking), a);
2072	return VINF_PGM_NO_DIRTY_BIT_TRACKING;
2073	}
2074	/* else: 4KB page table */
2075
2076	/*
2077	* Map the guest page table.
2078	*/
2079	PGSTPT pPTSrc;
2080	rc = PGM_GCPHYS_2_PTR(pVM, pPdeSrc->u & GST_PDE_PG_MASK, &pPTSrc);
2081	if (VBOX_SUCCESS(rc))
2082	{
2083	/*
2084	* Real page fault?
2085	*/
2086	PGSTPTE pPteSrc = &pPTSrc->a[(GCPtrPage >> GST_PT_SHIFT) & GST_PT_MASK];
2087	const GSTPTE PteSrc = *pPteSrc;
2088	if ( !PteSrc.n.u1Present
2089	# if PGM_WITH_NX(PGM_GST_TYPE, PGM_SHW_TYPE)
2090	\|\| (fNoExecuteBitValid && (uErr & X86_TRAP_PF_ID) && PteSrc.n.u1NoExecute)
2091	# endif
2092	\|\| (fWriteFault && !PteSrc.n.u1Write && (fUserLevelFault \|\| fWriteProtect))
2093	\|\| (fUserLevelFault && !PteSrc.n.u1User)
2094	)
2095	{
2096	# ifdef IN_GC
2097	STAM_COUNTER_INC(&pVM->pgm.s.StatGCDirtyTrackRealPF);
2098	# endif
2099	STAM_PROFILE_STOP(&pVM->pgm.s.CTXMID(Stat,DirtyBitTracking), a);
2100	LogFlow(("CheckPageFault: real page fault at %VGv PteSrc.u=%08x (2)\n", GCPtrPage, PteSrc.u));
2101
2102	/* Check the present bit as the shadow tables can cause different error codes by being out of sync.
2103	* See the 2nd case above as well.
2104	*/
2105	if (pPdeSrc->n.u1Present && pPteSrc->n.u1Present)
2106	TRPMSetErrorCode(pVM, uErr \| X86_TRAP_PF_P); /* page-level protection violation */
2107
2108	STAM_PROFILE_STOP(&pVM->pgm.s.CTXMID(Stat,DirtyBitTracking), a);
2109	return VINF_EM_RAW_GUEST_TRAP;
2110	}
2111	LogFlow(("CheckPageFault: page fault at %VGv PteSrc.u=%08x\n", GCPtrPage, PteSrc.u));
2112
2113	/*
2114	* Set the accessed bits in the page directory and the page table.
2115	*/
2116	# if PGM_GST_TYPE == PGM_TYPE_AMD64
2117	pPml4eSrc->n.u1Accessed = 1;
2118	pPdpeSrc->lm.u1Accessed = 1;
2119	# endif
2120	pPdeSrc->n.u1Accessed = 1;
2121	pPteSrc->n.u1Accessed = 1;
2122
2123	/*
2124	* Only write protection page faults are relevant here.
2125	*/
2126	if (fWriteFault)
2127	{
2128	/* Write access, so mark guest entry as dirty. */
2129	# if defined(IN_GC) && defined(VBOX_WITH_STATISTICS)
2130	if (!pPteSrc->n.u1Dirty)
2131	STAM_COUNTER_INC(&pVM->pgm.s.StatGCDirtiedPage);
2132	else
2133	STAM_COUNTER_INC(&pVM->pgm.s.StatGCPageAlreadyDirty);
2134	# endif
2135
2136	pPteSrc->n.u1Dirty = 1;
2137
2138	if (pPdeDst->n.u1Present)
2139	{
2140	#ifndef IN_RING0
2141	/* Bail out here as pgmPoolGetPageByHCPhys will return NULL and we'll crash below.
2142	* Our individual shadow handlers will provide more information and force a fatal exit.
2143	*/
2144	if (MMHyperIsInsideArea(pVM, (RTGCPTR)GCPtrPage))
2145	{
2146	LogRel(("CheckPageFault: write to hypervisor region %VGv\n", GCPtrPage));
2147	STAM_PROFILE_STOP(&pVM->pgm.s.CTXMID(Stat,DirtyBitTracking), a);
2148	return VINF_SUCCESS;
2149	}
2150	#endif
2151	/*
2152	* Map shadow page table.
2153	*/
2154	PPGMPOOLPAGE pShwPage = pgmPoolGetPageByHCPhys(pVM, pPdeDst->u & SHW_PDE_PG_MASK);
2155	if (pShwPage)
2156	{
2157	PSHWPT pPTDst = (PSHWPT)PGMPOOL_PAGE_2_PTR(pVM, pShwPage);
2158	PSHWPTE pPteDst = &pPTDst->a[(GCPtrPage >> SHW_PT_SHIFT) & SHW_PT_MASK];
2159	if ( pPteDst->n.u1Present /** @todo Optimize accessed bit emulation? */
2160	&& (pPteDst->u & PGM_PTFLAGS_TRACK_DIRTY))
2161	{
2162	LogFlow(("DIRTY page trap addr=%VGv\n", GCPtrPage));
2163	# ifdef VBOX_STRICT
2164	PPGMPAGE pPage = pgmPhysGetPage(&pVM->pgm.s, pPteSrc->u & GST_PTE_PG_MASK);
2165	if (pPage)
2166	AssertMsg(!PGM_PAGE_HAS_ACTIVE_HANDLERS(pPage),
2167	("Unexpected dirty bit tracking on monitored page %VGv (phys %VGp)!!!!!!\n", GCPtrPage, pPteSrc->u & X86_PTE_PAE_PG_MASK));
2168	# endif
2169	STAM_COUNTER_INC(&pVM->pgm.s.CTXMID(Stat,DirtyPageTrap));
2170
2171	Assert(pPteSrc->n.u1Write);
2172
2173	pPteDst->n.u1Write = 1;
2174	pPteDst->n.u1Dirty = 1;
2175	pPteDst->n.u1Accessed = 1;
2176	pPteDst->au32[0] &= ~PGM_PTFLAGS_TRACK_DIRTY;
2177	PGM_INVL_PG(GCPtrPage);
2178
2179	STAM_PROFILE_STOP(&pVM->pgm.s.CTXMID(Stat,DirtyBitTracking), a);
2180	return VINF_PGM_HANDLED_DIRTY_BIT_FAULT;
2181	}
2182	}
2183	else
2184	AssertMsgFailed(("pgmPoolGetPageByHCPhys %VGp failed!\n", pPdeDst->u & SHW_PDE_PG_MASK));
2185	}
2186	}
2187	/** @todo Optimize accessed bit emulation? */
2188	# ifdef VBOX_STRICT
2189	/*
2190	* Sanity check.
2191	*/
2192	else if ( !pPteSrc->n.u1Dirty
2193	&& (pPdeSrc->n.u1Write & pPteSrc->n.u1Write)
2194	&& pPdeDst->n.u1Present)
2195	{
2196	PPGMPOOLPAGE pShwPage = pgmPoolGetPageByHCPhys(pVM, pPdeDst->u & SHW_PDE_PG_MASK);
2197	PSHWPT pPTDst = (PSHWPT)PGMPOOL_PAGE_2_PTR(pVM, pShwPage);
2198	PSHWPTE pPteDst = &pPTDst->a[(GCPtrPage >> SHW_PT_SHIFT) & SHW_PT_MASK];
2199	if ( pPteDst->n.u1Present
2200	&& pPteDst->n.u1Write)
2201	LogFlow(("Writable present page %VGv not marked for dirty bit tracking!!!\n", GCPtrPage));
2202	}
2203	# endif /* VBOX_STRICT */
2204	STAM_PROFILE_STOP(&pVM->pgm.s.CTXMID(Stat,DirtyBitTracking), a);
2205	return VINF_PGM_NO_DIRTY_BIT_TRACKING;
2206	}
2207	AssertRC(rc);
2208	STAM_PROFILE_STOP(&pVM->pgm.s.CTXMID(Stat,DirtyBitTracking), a);
2209	return rc;
2210
2211
2212	UpperLevelPageFault:
2213	/* Pagefault detected while checking the PML4E, PDPE or PDE.
2214	* Single exit handler to get rid of duplicate code paths.
2215	*/
2216	# ifdef IN_GC
2217	STAM_COUNTER_INC(&pVM->pgm.s.StatGCDirtyTrackRealPF);
2218	# endif
2219	STAM_PROFILE_STOP(&pVM->pgm.s.CTXMID(Stat, DirtyBitTracking), a);
2220	Log(("CheckPageFault: real page fault at %VGv (%d)\n", GCPtrPage, uPageFaultLevel));
2221
2222	if (
2223	# if PGM_GST_TYPE == PGM_TYPE_AMD64
2224	pPml4eSrc->n.u1Present &&
2225	# endif
2226	# if PGM_GST_TYPE == PGM_TYPE_AMD64 \|\| PGM_GST_TYPE == PGM_TYPE_PAE
2227	pPdpeSrc->n.u1Present &&
2228	# endif
2229	pPdeSrc->n.u1Present)
2230	{
2231	/* Check the present bit as the shadow tables can cause different error codes by being out of sync. */
2232	if (pPdeSrc->b.u1Size && fBigPagesSupported)
2233	{
2234	TRPMSetErrorCode(pVM, uErr \| X86_TRAP_PF_P); /* page-level protection violation */
2235	}
2236	else
2237	{
2238	/*
2239	* Map the guest page table.
2240	*/
2241	PGSTPT pPTSrc;
2242	rc = PGM_GCPHYS_2_PTR(pVM, pPdeSrc->u & GST_PDE_PG_MASK, &pPTSrc);
2243	if (VBOX_SUCCESS(rc))
2244	{
2245	PGSTPTE pPteSrc = &pPTSrc->a[(GCPtrPage >> GST_PT_SHIFT) & GST_PT_MASK];
2246	const GSTPTE PteSrc = *pPteSrc;
2247	if (pPteSrc->n.u1Present)
2248	TRPMSetErrorCode(pVM, uErr \| X86_TRAP_PF_P); /* page-level protection violation */
2249	}
2250	AssertRC(rc);
2251	}
2252	}
2253	return VINF_EM_RAW_GUEST_TRAP;
2254	}
2255
2256	#endif /* PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE) */
2257
2258
2259	/**
2260	* Sync a shadow page table.
2261	*
2262	* The shadow page table is not present. This includes the case where
2263	* there is a conflict with a mapping.
2264	*
2265	* @returns VBox status code.
2266	* @param pVM VM handle.
2267	* @param iPD Page directory index.
2268	* @param pPDSrc Source page directory (i.e. Guest OS page directory).
2269	* Assume this is a temporary mapping.
2270	* @param GCPtrPage GC Pointer of the page that caused the fault
2271	*/
2272	PGM_BTH_DECL(int, SyncPT)(PVM pVM, unsigned iPDSrc, PGSTPD pPDSrc, RTGCUINTPTR GCPtrPage)
2273	{
2274	STAM_PROFILE_START(&pVM->pgm.s.CTXMID(Stat,SyncPT), a);
2275	STAM_COUNTER_INC(&pVM->pgm.s.StatGCSyncPtPD[iPDSrc]);
2276	LogFlow(("SyncPT: GCPtrPage=%VGv\n", GCPtrPage));
2277
2278	#if ( PGM_GST_TYPE == PGM_TYPE_32BIT \
2279	\|\| PGM_GST_TYPE == PGM_TYPE_PAE \
2280	\|\| PGM_GST_TYPE == PGM_TYPE_AMD64) \
2281	&& PGM_SHW_TYPE != PGM_TYPE_NESTED \
2282	&& PGM_SHW_TYPE != PGM_TYPE_EPT
2283
2284	int rc = VINF_SUCCESS;
2285
2286	/*
2287	* Validate input a little bit.
2288	*/
2289	AssertMsg(iPDSrc == ((GCPtrPage >> GST_PD_SHIFT) & GST_PD_MASK), ("iPDSrc=%x GCPtrPage=%VGv\n", iPDSrc, GCPtrPage));
2290	# if PGM_SHW_TYPE == PGM_TYPE_32BIT
2291	const unsigned iPDDst = GCPtrPage >> SHW_PD_SHIFT;
2292	PX86PD pPDDst = pVM->pgm.s.CTXMID(p,32BitPD);
2293	# elif PGM_SHW_TYPE == PGM_TYPE_PAE
2294	const unsigned iPDDst = GCPtrPage >> SHW_PD_SHIFT; /* no mask; flat index into the 2048 entry array. */
2295	const unsigned iPdpte = (GCPtrPage >> X86_PDPT_SHIFT); NOREF(iPdpte);
2296	PX86PDPT pPdptDst = pVM->pgm.s.CTXMID(p,PaePDPT); NOREF(pPdptDst);
2297	PX86PDPAE pPDDst = pVM->pgm.s.CTXMID(ap,PaePDs)[0];
2298	# elif PGM_SHW_TYPE == PGM_TYPE_AMD64
2299	const unsigned iPdpte = (GCPtrPage >> X86_PDPT_SHIFT) & X86_PDPT_MASK_AMD64;
2300	const unsigned iPDDst = (GCPtrPage >> SHW_PD_SHIFT) & SHW_PD_MASK;
2301	PX86PDPAE pPDDst;
2302	PX86PDPT pPdptDst;
2303	rc = PGMShwGetLongModePDPtr(pVM, GCPtrPage, &pPdptDst, &pPDDst);
2304	AssertRCReturn(rc, rc);
2305	Assert(pPDDst);
2306	# endif
2307
2308	PSHWPDE pPdeDst = &pPDDst->a[iPDDst];
2309	SHWPDE PdeDst = *pPdeDst;
2310
2311	# if PGM_GST_TYPE == PGM_TYPE_AMD64
2312	/* Fetch the pgm pool shadow descriptor. */
2313	PPGMPOOLPAGE pShwPde = pgmPoolGetPageByHCPhys(pVM, pPdptDst->a[iPdpte].u & X86_PDPE_PG_MASK);
2314	Assert(pShwPde);
2315	# endif
2316
2317	# ifndef PGM_WITHOUT_MAPPINGS
2318	/*
2319	* Check for conflicts.
2320	* GC: In case of a conflict we'll go to Ring-3 and do a full SyncCR3.
2321	* HC: Simply resolve the conflict.
2322	*/
2323	if (PdeDst.u & PGM_PDFLAGS_MAPPING)
2324	{
2325	Assert(pgmMapAreMappingsEnabled(&pVM->pgm.s));
2326	# ifndef IN_RING3
2327	Log(("SyncPT: Conflict at %VGv\n", GCPtrPage));
2328	STAM_PROFILE_STOP(&pVM->pgm.s.CTXMID(Stat,SyncPT), a);
2329	return VERR_ADDRESS_CONFLICT;
2330	# else
2331	PPGMMAPPING pMapping = pgmGetMapping(pVM, (RTGCPTR)GCPtrPage);
2332	Assert(pMapping);
2333	# if PGM_GST_TYPE == PGM_TYPE_32BIT
2334	int rc = pgmR3SyncPTResolveConflict(pVM, pMapping, pPDSrc, GCPtrPage & (GST_PD_MASK << GST_PD_SHIFT));
2335	# elif PGM_GST_TYPE == PGM_TYPE_PAE
2336	int rc = pgmR3SyncPTResolveConflictPAE(pVM, pMapping, GCPtrPage & (GST_PD_MASK << GST_PD_SHIFT));
2337	# else
2338	AssertFailed(); /* can't happen for amd64 */
2339	# endif
2340	if (VBOX_FAILURE(rc))
2341	{
2342	STAM_PROFILE_STOP(&pVM->pgm.s.CTXMID(Stat,SyncPT), a);
2343	return rc;
2344	}
2345	PdeDst = *pPdeDst;
2346	# endif
2347	}
2348	# else /* PGM_WITHOUT_MAPPINGS */
2349	Assert(!pgmMapAreMappingsEnabled(&pVM->pgm.s));
2350	# endif /* PGM_WITHOUT_MAPPINGS */
2351	Assert(!PdeDst.n.u1Present); /* We're only supposed to call SyncPT on PDE!P and conflicts.*/
2352
2353	/*
2354	* Sync page directory entry.
2355	*/
2356	GSTPDE PdeSrc = pPDSrc->a[iPDSrc];
2357	if (PdeSrc.n.u1Present)
2358	{
2359	/*
2360	* Allocate & map the page table.
2361	*/
2362	PSHWPT pPTDst;
2363	# if PGM_GST_TYPE == PGM_TYPE_AMD64
2364	const bool fPageTable = !PdeSrc.b.u1Size;
2365	# else
2366	const bool fPageTable = !PdeSrc.b.u1Size \|\| !(CPUMGetGuestCR4(pVM) & X86_CR4_PSE);
2367	# endif
2368	PPGMPOOLPAGE pShwPage;
2369	RTGCPHYS GCPhys;
2370	if (fPageTable)
2371	{
2372	GCPhys = PdeSrc.u & GST_PDE_PG_MASK;
2373	# if PGM_SHW_TYPE == PGM_TYPE_PAE && PGM_GST_TYPE == PGM_TYPE_32BIT
2374	/* Select the right PDE as we're emulating a 4kb page table with 2 shadow page tables. */
2375	GCPhys \|= (iPDDst & 1) * (PAGE_SIZE / 2);
2376	# endif
2377	# if PGM_GST_TYPE == PGM_TYPE_AMD64
2378	rc = pgmPoolAlloc(pVM, GCPhys, BTH_PGMPOOLKIND_PT_FOR_PT, pShwPde->idx, iPDDst, &pShwPage);
2379	# else
2380	rc = pgmPoolAlloc(pVM, GCPhys, BTH_PGMPOOLKIND_PT_FOR_PT, SHW_POOL_ROOT_IDX, iPDDst, &pShwPage);
2381	# endif
2382	}
2383	else
2384	{
2385	GCPhys = GST_GET_PDE_BIG_PG_GCPHYS(PdeSrc);
2386	# if PGM_SHW_TYPE == PGM_TYPE_PAE && PGM_GST_TYPE == PGM_TYPE_32BIT
2387	/* Select the right PDE as we're emulating a 4MB page directory with two 2 MB shadow PDEs.*/
2388	GCPhys \|= GCPtrPage & (1 << X86_PD_PAE_SHIFT);
2389	# endif
2390	# if PGM_GST_TYPE == PGM_TYPE_AMD64
2391	rc = pgmPoolAlloc(pVM, GCPhys, BTH_PGMPOOLKIND_PT_FOR_BIG, pShwPde->idx, iPDDst, &pShwPage);
2392	# else
2393	rc = pgmPoolAlloc(pVM, GCPhys, BTH_PGMPOOLKIND_PT_FOR_BIG, SHW_POOL_ROOT_IDX, iPDDst, &pShwPage);
2394	# endif
2395	}
2396	if (rc == VINF_SUCCESS)
2397	pPTDst = (PSHWPT)PGMPOOL_PAGE_2_PTR(pVM, pShwPage);
2398	else if (rc == VINF_PGM_CACHED_PAGE)
2399	{
2400	/*
2401	* The PT was cached, just hook it up.
2402	*/
2403	if (fPageTable)
2404	PdeDst.u = pShwPage->Core.Key
2405	\| (PdeSrc.u & ~(GST_PDE_PG_MASK \| X86_PDE_AVL_MASK \| X86_PDE_PCD \| X86_PDE_PWT \| X86_PDE_PS \| X86_PDE4M_G \| X86_PDE4M_D));
2406	else
2407	{
2408	PdeDst.u = pShwPage->Core.Key
2409	\| (PdeSrc.u & ~(GST_PDE_PG_MASK \| X86_PDE_AVL_MASK \| X86_PDE_PCD \| X86_PDE_PWT \| X86_PDE_PS \| X86_PDE4M_G \| X86_PDE4M_D));
2410	/* (see explanation and assumptions further down.) */
2411	if (!PdeSrc.b.u1Dirty && PdeSrc.b.u1Write)
2412	{
2413	STAM_COUNTER_INC(&pVM->pgm.s.CTXMID(Stat,DirtyPageBig));
2414	PdeDst.u \|= PGM_PDFLAGS_TRACK_DIRTY;
2415	PdeDst.b.u1Write = 0;
2416	}
2417	}
2418	*pPdeDst = PdeDst;
2419	return VINF_SUCCESS;
2420	}
2421	else if (rc == VERR_PGM_POOL_FLUSHED)
2422	{
2423	VM_FF_SET(pVM, VM_FF_PGM_SYNC_CR3);
2424	return VINF_PGM_SYNC_CR3;
2425	}
2426	else
2427	AssertMsgFailedReturn(("rc=%Vrc\n", rc), VERR_INTERNAL_ERROR);
2428	PdeDst.u &= X86_PDE_AVL_MASK;
2429	PdeDst.u \|= pShwPage->Core.Key;
2430
2431	/*
2432	* Page directory has been accessed (this is a fault situation, remember).
2433	*/
2434	pPDSrc->a[iPDSrc].n.u1Accessed = 1;
2435	if (fPageTable)
2436	{
2437	/*
2438	* Page table - 4KB.
2439	*
2440	* Sync all or just a few entries depending on PGM_SYNC_N_PAGES.
2441	*/
2442	Log2(("SyncPT: 4K %VGv PdeSrc:{P=%d RW=%d U=%d raw=%08llx}\n",
2443	GCPtrPage, PdeSrc.b.u1Present, PdeSrc.b.u1Write, PdeSrc.b.u1User, (uint64_t)PdeSrc.u));
2444	PGSTPT pPTSrc;
2445	rc = PGM_GCPHYS_2_PTR(pVM, PdeSrc.u & GST_PDE_PG_MASK, &pPTSrc);
2446	if (VBOX_SUCCESS(rc))
2447	{
2448	/*
2449	* Start by syncing the page directory entry so CSAM's TLB trick works.
2450	*/
2451	PdeDst.u = (PdeDst.u & (SHW_PDE_PG_MASK \| X86_PDE_AVL_MASK))
2452	\| (PdeSrc.u & ~(GST_PDE_PG_MASK \| X86_PDE_AVL_MASK \| X86_PDE_PCD \| X86_PDE_PWT \| X86_PDE_PS \| X86_PDE4M_G \| X86_PDE4M_D));
2453	*pPdeDst = PdeDst;
2454
2455	/*
2456	* Directory/page user or supervisor privilege: (same goes for read/write)
2457	*
2458	* Directory Page Combined
2459	* U/S U/S U/S
2460	* 0 0 0
2461	* 0 1 0
2462	* 1 0 0
2463	* 1 1 1
2464	*
2465	* Simple AND operation. Table listed for completeness.
2466	*
2467	*/
2468	STAM_COUNTER_INC(CTXSUFF(&pVM->pgm.s.StatSynPT4k));
2469	# ifdef PGM_SYNC_N_PAGES
2470	unsigned iPTBase = (GCPtrPage >> SHW_PT_SHIFT) & SHW_PT_MASK;
2471	unsigned iPTDst = iPTBase;
2472	const unsigned iPTDstEnd = RT_MIN(iPTDst + PGM_SYNC_NR_PAGES / 2, RT_ELEMENTS(pPTDst->a));
2473	if (iPTDst <= PGM_SYNC_NR_PAGES / 2)
2474	iPTDst = 0;
2475	else
2476	iPTDst -= PGM_SYNC_NR_PAGES / 2;
2477	# else /* !PGM_SYNC_N_PAGES */
2478	unsigned iPTDst = 0;
2479	const unsigned iPTDstEnd = RT_ELEMENTS(pPTDst->a);
2480	# endif /* !PGM_SYNC_N_PAGES */
2481	# if PGM_SHW_TYPE == PGM_TYPE_PAE && PGM_GST_TYPE == PGM_TYPE_32BIT
2482	/* Select the right PDE as we're emulating a 4kb page table with 2 shadow page tables. */
2483	const unsigned offPTSrc = ((GCPtrPage >> SHW_PD_SHIFT) & 1) * 512;
2484	# else
2485	const unsigned offPTSrc = 0;
2486	# endif
2487	for (; iPTDst < iPTDstEnd; iPTDst++)
2488	{
2489	const unsigned iPTSrc = iPTDst + offPTSrc;
2490	const GSTPTE PteSrc = pPTSrc->a[iPTSrc];
2491
2492	if (PteSrc.n.u1Present) /* we've already cleared it above */
2493	{
2494	# ifndef IN_RING0
2495	/*
2496	* Assuming kernel code will be marked as supervisor - and not as user level
2497	* and executed using a conforming code selector - And marked as readonly.
2498	* Also assume that if we're monitoring a page, it's of no interest to CSAM.
2499	*/
2500	PPGMPAGE pPage;
2501	if ( ((PdeSrc.u & pPTSrc->a[iPTSrc].u) & (X86_PTE_RW \| X86_PTE_US))
2502	\|\| !CSAMDoesPageNeedScanning(pVM, (RTRCPTR)((iPDSrc << GST_PD_SHIFT) \| (iPTSrc << PAGE_SHIFT)))
2503	\|\| ( (pPage = pgmPhysGetPage(&pVM->pgm.s, PteSrc.u & GST_PTE_PG_MASK))
2504	&& PGM_PAGE_HAS_ACTIVE_HANDLERS(pPage))
2505	)
2506	# endif
2507	PGM_BTH_NAME(SyncPageWorker)(pVM, &pPTDst->a[iPTDst], PdeSrc, PteSrc, pShwPage, iPTDst);
2508	Log2(("SyncPT: 4K+ %VGv PteSrc:{P=%d RW=%d U=%d raw=%08llx}%s dst.raw=%08llx iPTSrc=%x PdeSrc.u=%x physpte=%VGp\n",
2509	(RTGCPTR)((iPDSrc << GST_PD_SHIFT) \| (iPTSrc << PAGE_SHIFT)),
2510	PteSrc.n.u1Present,
2511	PteSrc.n.u1Write & PdeSrc.n.u1Write,
2512	PteSrc.n.u1User & PdeSrc.n.u1User,
2513	(uint64_t)PteSrc.u,
2514	pPTDst->a[iPTDst].u & PGM_PTFLAGS_TRACK_DIRTY ? " Track-Dirty" : "", pPTDst->a[iPTDst].u, iPTSrc, PdeSrc.au32[0],
2515	(PdeSrc.u & GST_PDE_PG_MASK) + iPTSrc*sizeof(PteSrc)));
2516	}
2517	} /* for PTEs */
2518	}
2519	}
2520	else
2521	{
2522	/*
2523	* Big page - 2/4MB.
2524	*
2525	* We'll walk the ram range list in parallel and optimize lookups.
2526	* We will only sync on shadow page table at a time.
2527	*/
2528	STAM_COUNTER_INC(CTXSUFF(&pVM->pgm.s.StatSynPT4M));
2529
2530	/**
2531	* @todo It might be more efficient to sync only a part of the 4MB page (similar to what we do for 4kb PDs).
2532	*/
2533
2534	/*
2535	* Start by syncing the page directory entry.
2536	*/
2537	PdeDst.u = (PdeDst.u & (SHW_PDE_PG_MASK \| (X86_PDE_AVL_MASK & ~PGM_PDFLAGS_TRACK_DIRTY)))
2538	\| (PdeSrc.u & ~(GST_PDE_PG_MASK \| X86_PDE_AVL_MASK \| X86_PDE_PCD \| X86_PDE_PWT \| X86_PDE_PS \| X86_PDE4M_G \| X86_PDE4M_D));
2539
2540	/*
2541	* If the page is not flagged as dirty and is writable, then make it read-only
2542	* at PD level, so we can set the dirty bit when the page is modified.
2543	*
2544	* ASSUMES that page access handlers are implemented on page table entry level.
2545	* Thus we will first catch the dirty access and set PDE.D and restart. If
2546	* there is an access handler, we'll trap again and let it work on the problem.
2547	*/
2548	/** @todo move the above stuff to a section in the PGM documentation. */
2549	Assert(!(PdeDst.u & PGM_PDFLAGS_TRACK_DIRTY));
2550	if (!PdeSrc.b.u1Dirty && PdeSrc.b.u1Write)
2551	{
2552	STAM_COUNTER_INC(&pVM->pgm.s.CTXMID(Stat,DirtyPageBig));
2553	PdeDst.u \|= PGM_PDFLAGS_TRACK_DIRTY;
2554	PdeDst.b.u1Write = 0;
2555	}
2556	*pPdeDst = PdeDst;
2557
2558	/*
2559	* Fill the shadow page table.
2560	*/
2561	/* Get address and flags from the source PDE. */
2562	SHWPTE PteDstBase;
2563	PteDstBase.u = PdeSrc.u & ~(GST_PDE_PG_MASK \| X86_PTE_AVL_MASK \| X86_PTE_PAT \| X86_PTE_PCD \| X86_PTE_PWT);
2564
2565	/* Loop thru the entries in the shadow PT. */
2566	const RTGCUINTPTR GCPtr = (GCPtrPage >> SHW_PD_SHIFT) << SHW_PD_SHIFT; NOREF(GCPtr);
2567	Log2(("SyncPT: BIG %VGv PdeSrc:{P=%d RW=%d U=%d raw=%08llx} Shw=%VGv GCPhys=%VGp %s\n",
2568	GCPtrPage, PdeSrc.b.u1Present, PdeSrc.b.u1Write, PdeSrc.b.u1User, (uint64_t)PdeSrc.u, GCPtr,
2569	GCPhys, PdeDst.u & PGM_PDFLAGS_TRACK_DIRTY ? " Track-Dirty" : ""));
2570	PPGMRAMRANGE pRam = CTXALLSUFF(pVM->pgm.s.pRamRanges);
2571	unsigned iPTDst = 0;
2572	while (iPTDst < RT_ELEMENTS(pPTDst->a))
2573	{
2574	/* Advance ram range list. */
2575	while (pRam && GCPhys > pRam->GCPhysLast)
2576	pRam = CTXALLSUFF(pRam->pNext);
2577	if (pRam && GCPhys >= pRam->GCPhys)
2578	{
2579	unsigned iHCPage = (GCPhys - pRam->GCPhys) >> PAGE_SHIFT;
2580	do
2581	{
2582	/* Make shadow PTE. */
2583	PPGMPAGE pPage = &pRam->aPages[iHCPage];
2584	SHWPTE PteDst;
2585
2586	/* Make sure the RAM has already been allocated. */
2587	if (pRam->fFlags & MM_RAM_FLAGS_DYNAMIC_ALLOC) /** @todo PAGE FLAGS */
2588	{
2589	if (RT_UNLIKELY(!PGM_PAGE_GET_HCPHYS(pPage)))
2590	{
2591	# ifdef IN_RING3
2592	int rc = pgmr3PhysGrowRange(pVM, GCPhys);
2593	# else
2594	int rc = CTXALLMID(VMM, CallHost)(pVM, VMMCALLHOST_PGM_RAM_GROW_RANGE, GCPhys);
2595	# endif
2596	if (rc != VINF_SUCCESS)
2597	return rc;
2598	}
2599	}
2600
2601	if (PGM_PAGE_HAS_ACTIVE_HANDLERS(pPage))
2602	{
2603	if (!PGM_PAGE_HAS_ACTIVE_ALL_HANDLERS(pPage))
2604	{
2605	PteDst.u = PGM_PAGE_GET_HCPHYS(pPage) \| PteDstBase.u;
2606	PteDst.n.u1Write = 0;
2607	}
2608	else
2609	PteDst.u = 0;
2610	}
2611	# ifndef IN_RING0
2612	/*
2613	* Assuming kernel code will be marked as supervisor and not as user level and executed
2614	* using a conforming code selector. Don't check for readonly, as that implies the whole
2615	* 4MB can be code or readonly data. Linux enables write access for its large pages.
2616	*/
2617	else if ( !PdeSrc.n.u1User
2618	&& CSAMDoesPageNeedScanning(pVM, (RTRCPTR)(GCPtr \| (iPTDst << SHW_PT_SHIFT))))
2619	PteDst.u = 0;
2620	# endif
2621	else
2622	PteDst.u = PGM_PAGE_GET_HCPHYS(pPage) \| PteDstBase.u;
2623	# ifdef PGMPOOL_WITH_USER_TRACKING
2624	if (PteDst.n.u1Present)
2625	PGM_BTH_NAME(SyncPageWorkerTrackAddref)(pVM, pShwPage, pPage->HCPhys >> MM_RAM_FLAGS_IDX_SHIFT, pPage, iPTDst); /** @todo PAGE FLAGS */
2626	# endif
2627	/* commit it */
2628	pPTDst->a[iPTDst] = PteDst;
2629	Log4(("SyncPT: BIG %VGv PteDst:{P=%d RW=%d U=%d raw=%08llx}%s\n",
2630	(RTGCPTR)(GCPtr \| (iPTDst << SHW_PT_SHIFT)), PteDst.n.u1Present, PteDst.n.u1Write, PteDst.n.u1User, (uint64_t)PteDst.u,
2631	PteDst.u & PGM_PTFLAGS_TRACK_DIRTY ? " Track-Dirty" : ""));
2632
2633	/* advance */
2634	GCPhys += PAGE_SIZE;
2635	iHCPage++;
2636	iPTDst++;
2637	} while ( iPTDst < RT_ELEMENTS(pPTDst->a)
2638	&& GCPhys <= pRam->GCPhysLast);
2639	}
2640	else if (pRam)
2641	{
2642	Log(("Invalid pages at %VGp\n", GCPhys));
2643	do
2644	{
2645	pPTDst->a[iPTDst].u = 0; /* MMIO or invalid page, we must handle them manually. */
2646	GCPhys += PAGE_SIZE;
2647	iPTDst++;
2648	} while ( iPTDst < RT_ELEMENTS(pPTDst->a)
2649	&& GCPhys < pRam->GCPhys);
2650	}
2651	else
2652	{
2653	Log(("Invalid pages at %VGp (2)\n", GCPhys));
2654	for ( ; iPTDst < RT_ELEMENTS(pPTDst->a); iPTDst++)
2655	pPTDst->a[iPTDst].u = 0; /* MMIO or invalid page, we must handle them manually. */
2656	}
2657	} /* while more PTEs */
2658	} /* 4KB / 4MB */
2659	}
2660	else
2661	AssertRelease(!PdeDst.n.u1Present);
2662
2663	STAM_PROFILE_STOP(&pVM->pgm.s.CTXMID(Stat,SyncPT), a);
2664	# ifdef IN_GC
2665	if (VBOX_FAILURE(rc))
2666	STAM_COUNTER_INC(&pVM->pgm.s.CTXMID(Stat,SyncPTFailed));
2667	# endif
2668	return rc;
2669
2670	#elif (PGM_GST_TYPE == PGM_TYPE_REAL \|\| PGM_GST_TYPE == PGM_TYPE_PROT) \
2671	&& PGM_SHW_TYPE != PGM_TYPE_NESTED \
2672	&& (PGM_SHW_TYPE != PGM_TYPE_EPT \|\| PGM_GST_TYPE == PGM_TYPE_PROT)
2673
2674	int rc = VINF_SUCCESS;
2675
2676	/*
2677	* Validate input a little bit.
2678	*/
2679	# if PGM_SHW_TYPE == PGM_TYPE_32BIT
2680	const unsigned iPDDst = GCPtrPage >> SHW_PD_SHIFT;
2681	PX86PD pPDDst = pVM->pgm.s.CTXMID(p,32BitPD);
2682	# elif PGM_SHW_TYPE == PGM_TYPE_PAE
2683	const unsigned iPDDst = GCPtrPage >> SHW_PD_SHIFT; /* no mask; flat index into the 2048 entry array. */
2684	PX86PDPAE pPDDst = pVM->pgm.s.CTXMID(ap,PaePDs)[0];
2685	# elif PGM_SHW_TYPE == PGM_TYPE_AMD64
2686	const unsigned iPdpte = (GCPtrPage >> X86_PDPT_SHIFT) & X86_PDPT_MASK_AMD64;
2687	const unsigned iPDDst = (GCPtrPage >> SHW_PD_SHIFT) & SHW_PD_MASK;
2688	PX86PDPAE pPDDst;
2689	PX86PDPT pPdptDst;
2690	rc = PGMShwGetLongModePDPtr(pVM, GCPtrPage, &pPdptDst, &pPDDst);
2691	AssertRCReturn(rc, rc);
2692	Assert(pPDDst);
2693
2694	/* Fetch the pgm pool shadow descriptor. */
2695	PPGMPOOLPAGE pShwPde = pgmPoolGetPageByHCPhys(pVM, pPdptDst->a[iPdpte].u & X86_PDPE_PG_MASK);
2696	Assert(pShwPde);
2697	# elif PGM_SHW_TYPE == PGM_TYPE_EPT
2698	const unsigned iPdpte = (GCPtrPage >> EPT_PDPT_SHIFT) & EPT_PDPT_MASK;
2699	const unsigned iPDDst = ((GCPtrPage >> SHW_PD_SHIFT) & SHW_PD_MASK);
2700	PEPTPD pPDDst;
2701	PEPTPDPT pPdptDst;
2702
2703	rc = PGMShwGetEPTPDPtr(pVM, GCPtrPage, &pPdptDst, &pPDDst);
2704	AssertRCReturn(rc, rc);
2705	Assert(pPDDst);
2706
2707	/* Fetch the pgm pool shadow descriptor. */
2708	PPGMPOOLPAGE pShwPde = pgmPoolGetPageByHCPhys(pVM, pPdptDst->a[iPdpte].u & X86_PDPE_PG_MASK);
2709	Assert(pShwPde);
2710	# endif
2711	PSHWPDE pPdeDst = &pPDDst->a[iPDDst];
2712	SHWPDE PdeDst = *pPdeDst;
2713
2714	Assert(!(PdeDst.u & PGM_PDFLAGS_MAPPING));
2715	Assert(!PdeDst.n.u1Present); /* We're only supposed to call SyncPT on PDE!P and conflicts.*/
2716
2717	GSTPDE PdeSrc;
2718	PdeSrc.au32[0] = 0; /* faked so we don't have to #ifdef everything */
2719	PdeSrc.n.u1Present = 1;
2720	PdeSrc.n.u1Write = 1;
2721	PdeSrc.n.u1Accessed = 1;
2722	PdeSrc.n.u1User = 1;
2723
2724	/*
2725	* Allocate & map the page table.
2726	*/
2727	PSHWPT pPTDst;
2728	PPGMPOOLPAGE pShwPage;
2729	RTGCPHYS GCPhys;
2730
2731	/* Virtual address = physical address */
2732	GCPhys = GCPtrPage & X86_PAGE_4K_BASE_MASK;
2733	# if PGM_SHW_TYPE == PGM_TYPE_AMD64 \|\| PGM_SHW_TYPE == PGM_TYPE_EPT
2734	rc = pgmPoolAlloc(pVM, GCPhys & ~(RT_BIT_64(SHW_PD_SHIFT) - 1), BTH_PGMPOOLKIND_PT_FOR_PT, pShwPde->idx, iPDDst, &pShwPage);
2735	# else
2736	rc = pgmPoolAlloc(pVM, GCPhys & ~(RT_BIT_64(SHW_PD_SHIFT) - 1), BTH_PGMPOOLKIND_PT_FOR_PT, SHW_POOL_ROOT_IDX, iPDDst, &pShwPage);
2737	# endif
2738
2739	if ( rc == VINF_SUCCESS
2740	\|\| rc == VINF_PGM_CACHED_PAGE)
2741	pPTDst = (PSHWPT)PGMPOOL_PAGE_2_PTR(pVM, pShwPage);
2742	else
2743	AssertMsgFailedReturn(("rc=%Vrc\n", rc), VERR_INTERNAL_ERROR);
2744
2745	PdeDst.u &= X86_PDE_AVL_MASK;
2746	PdeDst.u \|= pShwPage->Core.Key;
2747	PdeDst.n.u1Present = 1;
2748	PdeDst.n.u1Write = 1;
2749	# if PGM_SHW_TYPE != PGM_TYPE_EPT
2750	PdeDst.n.u1User = 1;
2751	PdeDst.n.u1Accessed = 1;
2752	# endif
2753	*pPdeDst = PdeDst;
2754
2755	rc = PGM_BTH_NAME(SyncPage)(pVM, PdeSrc, (RTGCUINTPTR)GCPtrPage, PGM_SYNC_NR_PAGES, 0 /* page not present */);
2756	STAM_PROFILE_STOP(&pVM->pgm.s.CTXMID(Stat,SyncPT), a);
2757	return rc;
2758
2759	#else
2760	AssertReleaseMsgFailed(("Shw=%d Gst=%d is not implemented!\n", PGM_GST_TYPE, PGM_SHW_TYPE));
2761	STAM_PROFILE_STOP(&pVM->pgm.s.CTXMID(Stat,SyncPT), a);
2762	return VERR_INTERNAL_ERROR;
2763	#endif
2764	}
2765
2766
2767
2768	/**
2769	* Prefetch a page/set of pages.
2770	*
2771	* Typically used to sync commonly used pages before entering raw mode
2772	* after a CR3 reload.
2773	*
2774	* @returns VBox status code.
2775	* @param pVM VM handle.
2776	* @param GCPtrPage Page to invalidate.
2777	*/
2778	PGM_BTH_DECL(int, PrefetchPage)(PVM pVM, RTGCUINTPTR GCPtrPage)
2779	{
2780	#if (PGM_GST_TYPE == PGM_TYPE_32BIT \|\| PGM_GST_TYPE == PGM_TYPE_REAL \|\| PGM_GST_TYPE == PGM_TYPE_PROT \|\| PGM_GST_TYPE == PGM_TYPE_PAE \|\| PGM_GST_TYPE == PGM_TYPE_AMD64) \
2781	&& PGM_SHW_TYPE != PGM_TYPE_NESTED && PGM_SHW_TYPE != PGM_TYPE_EPT
2782	/*
2783	* Check that all Guest levels thru the PDE are present, getting the
2784	* PD and PDE in the processes.
2785	*/
2786	int rc = VINF_SUCCESS;
2787	# if PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE)
2788	# if PGM_GST_TYPE == PGM_TYPE_32BIT
2789	const unsigned iPDSrc = (RTGCUINTPTR)GCPtrPage >> GST_PD_SHIFT;
2790	PGSTPD pPDSrc = CTXSUFF(pVM->pgm.s.pGuestPD);
2791	# elif PGM_GST_TYPE == PGM_TYPE_PAE
2792	unsigned iPDSrc;
2793	PGSTPD pPDSrc = pgmGstGetPaePDPtr(&pVM->pgm.s, GCPtrPage, &iPDSrc);
2794	if (!pPDSrc)
2795	return VINF_SUCCESS; /* not present */
2796	# elif PGM_GST_TYPE == PGM_TYPE_AMD64
2797	unsigned iPDSrc;
2798	PX86PML4E pPml4eSrc;
2799	X86PDPE PdpeSrc;
2800	PGSTPD pPDSrc = pgmGstGetLongModePDPtr(&pVM->pgm.s, GCPtrPage, &pPml4eSrc, &PdpeSrc, &iPDSrc);
2801	if (!pPDSrc)
2802	return VINF_SUCCESS; /* not present */
2803	# endif
2804	const GSTPDE PdeSrc = pPDSrc->a[iPDSrc];
2805	# else
2806	PGSTPD pPDSrc = NULL;
2807	const unsigned iPDSrc = 0;
2808	GSTPDE PdeSrc;
2809
2810	PdeSrc.au32[0] = 0; /* faked so we don't have to #ifdef everything */
2811	PdeSrc.n.u1Present = 1;
2812	PdeSrc.n.u1Write = 1;
2813	PdeSrc.n.u1Accessed = 1;
2814	PdeSrc.n.u1User = 1;
2815	# endif
2816
2817	if (PdeSrc.n.u1Present && PdeSrc.n.u1Accessed)
2818	{
2819	# if PGM_SHW_TYPE == PGM_TYPE_32BIT
2820	const X86PDE PdeDst = pVM->pgm.s.CTXMID(p,32BitPD)->a[GCPtrPage >> SHW_PD_SHIFT];
2821	# elif PGM_SHW_TYPE == PGM_TYPE_PAE
2822	const X86PDEPAE PdeDst = pVM->pgm.s.CTXMID(ap,PaePDs)[0]->a[GCPtrPage >> SHW_PD_SHIFT];
2823	# elif PGM_SHW_TYPE == PGM_TYPE_AMD64
2824	const unsigned iPDDst = ((GCPtrPage >> SHW_PD_SHIFT) & SHW_PD_MASK);
2825	PX86PDPAE pPDDst;
2826	X86PDEPAE PdeDst;
2827
2828	# if PGM_GST_TYPE == PGM_TYPE_PROT
2829	/* AMD-V nested paging */
2830	X86PML4E Pml4eSrc;
2831	X86PDPE PdpeSrc;
2832	PX86PML4E pPml4eSrc = &Pml4eSrc;
2833
2834	/* Fake PML4 & PDPT entry; access control handled on the page table level, so allow everything. */
2835	Pml4eSrc.u = X86_PML4E_P \| X86_PML4E_RW \| X86_PML4E_US \| X86_PML4E_NX \| X86_PML4E_A;
2836	PdpeSrc.u = X86_PDPE_P \| X86_PDPE_RW \| X86_PDPE_US \| X86_PDPE_NX \| X86_PDPE_A;
2837	# endif
2838
2839	int rc = PGMShwSyncLongModePDPtr(pVM, GCPtrPage, pPml4eSrc, &PdpeSrc, &pPDDst);
2840	AssertReturn(rc == VINF_SUCCESS /* must test for VINF_SUCCESS!! */, rc);
2841	Assert(pPDDst);
2842	PdeDst = pPDDst->a[iPDDst];
2843	# endif
2844	if (!(PdeDst.u & PGM_PDFLAGS_MAPPING))
2845	{
2846	if (!PdeDst.n.u1Present)
2847	/** r=bird: This guy will set the A bit on the PDE, probably harmless. */
2848	rc = PGM_BTH_NAME(SyncPT)(pVM, iPDSrc, pPDSrc, GCPtrPage);
2849	else
2850	{
2851	/** @note We used to sync PGM_SYNC_NR_PAGES pages, which triggered assertions in CSAM, because
2852	* R/W attributes of nearby pages were reset. Not sure how that could happen. Anyway, it
2853	* makes no sense to prefetch more than one page.
2854	*/
2855	rc = PGM_BTH_NAME(SyncPage)(pVM, PdeSrc, GCPtrPage, 1, 0);
2856	if (VBOX_SUCCESS(rc))
2857	rc = VINF_SUCCESS;
2858	}
2859	}
2860	}
2861	return rc;
2862	#elif PGM_SHW_TYPE == PGM_TYPE_NESTED \|\| PGM_SHW_TYPE == PGM_TYPE_EPT
2863	return VINF_SUCCESS; /* ignore */
2864	#endif
2865	}
2866
2867
2868
2869
2870	/**
2871	* Syncs a page during a PGMVerifyAccess() call.
2872	*
2873	* @returns VBox status code (informational included).
2874	* @param GCPtrPage The address of the page to sync.
2875	* @param fPage The effective guest page flags.
2876	* @param uErr The trap error code.
2877	*/
2878	PGM_BTH_DECL(int, VerifyAccessSyncPage)(PVM pVM, RTGCUINTPTR GCPtrPage, unsigned fPage, unsigned uErr)
2879	{
2880	LogFlow(("VerifyAccessSyncPage: GCPtrPage=%VGv fPage=%#x uErr=%#x\n", GCPtrPage, fPage, uErr));
2881
2882	Assert(!HWACCMIsNestedPagingActive(pVM));
2883	#if (PGM_GST_TYPE == PGM_TYPE_32BIT \|\| PGM_GST_TYPE == PGM_TYPE_REAL \|\| PGM_GST_TYPE == PGM_TYPE_PROT \|\| PGM_GST_TYPE == PGM_TYPE_PAE \|\| PGM_TYPE_AMD64) \
2884	&& PGM_SHW_TYPE != PGM_TYPE_NESTED && PGM_SHW_TYPE != PGM_TYPE_EPT
2885
2886	# ifndef IN_RING0
2887	if (!(fPage & X86_PTE_US))
2888	{
2889	/*
2890	* Mark this page as safe.
2891	*/
2892	/** @todo not correct for pages that contain both code and data!! */
2893	Log(("CSAMMarkPage %VGv; scanned=%d\n", GCPtrPage, true));
2894	CSAMMarkPage(pVM, (RTRCPTR)GCPtrPage, true);
2895	}
2896	# endif
2897	/*
2898	* Get guest PD and index.
2899	*/
2900
2901	# if PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE)
2902	# if PGM_GST_TYPE == PGM_TYPE_32BIT
2903	const unsigned iPDSrc = (RTGCUINTPTR)GCPtrPage >> GST_PD_SHIFT;
2904	PGSTPD pPDSrc = CTXSUFF(pVM->pgm.s.pGuestPD);
2905	# elif PGM_GST_TYPE == PGM_TYPE_PAE
2906	unsigned iPDSrc;
2907	PGSTPD pPDSrc = pgmGstGetPaePDPtr(&pVM->pgm.s, GCPtrPage, &iPDSrc);
2908
2909	if (pPDSrc)
2910	{
2911	Log(("PGMVerifyAccess: access violation for %VGv due to non-present PDPTR\n", GCPtrPage));
2912	return VINF_EM_RAW_GUEST_TRAP;
2913	}
2914	# elif PGM_GST_TYPE == PGM_TYPE_AMD64
2915	unsigned iPDSrc;
2916	PX86PML4E pPml4eSrc;
2917	X86PDPE PdpeSrc;
2918	PGSTPD pPDSrc = pgmGstGetLongModePDPtr(&pVM->pgm.s, GCPtrPage, &pPml4eSrc, &PdpeSrc, &iPDSrc);
2919	if (!pPDSrc)
2920	{
2921	Log(("PGMVerifyAccess: access violation for %VGv due to non-present PDPTR\n", GCPtrPage));
2922	return VINF_EM_RAW_GUEST_TRAP;
2923	}
2924	# endif
2925	# else
2926	PGSTPD pPDSrc = NULL;
2927	const unsigned iPDSrc = 0;
2928	# endif
2929	int rc = VINF_SUCCESS;
2930
2931	/*
2932	* First check if the shadow pd is present.
2933	*/
2934	# if PGM_SHW_TYPE == PGM_TYPE_32BIT
2935	PX86PDE pPdeDst = &pVM->pgm.s.CTXMID(p,32BitPD)->a[GCPtrPage >> SHW_PD_SHIFT];
2936	# elif PGM_SHW_TYPE == PGM_TYPE_PAE
2937	PX86PDEPAE pPdeDst = &pVM->pgm.s.CTXMID(ap,PaePDs)[0]->a[GCPtrPage >> SHW_PD_SHIFT];
2938	# elif PGM_SHW_TYPE == PGM_TYPE_AMD64
2939	const unsigned iPDDst = ((GCPtrPage >> SHW_PD_SHIFT) & SHW_PD_MASK);
2940	PX86PDPAE pPDDst;
2941	PX86PDEPAE pPdeDst;
2942
2943	# if PGM_GST_TYPE == PGM_TYPE_PROT
2944	/* AMD-V nested paging */
2945	X86PML4E Pml4eSrc;
2946	X86PDPE PdpeSrc;
2947	PX86PML4E pPml4eSrc = &Pml4eSrc;
2948
2949	/* Fake PML4 & PDPT entry; access control handled on the page table level, so allow everything. */
2950	Pml4eSrc.u = X86_PML4E_P \| X86_PML4E_RW \| X86_PML4E_US \| X86_PML4E_NX \| X86_PML4E_A;
2951	PdpeSrc.u = X86_PDPE_P \| X86_PDPE_RW \| X86_PDPE_US \| X86_PDPE_NX \| X86_PDPE_A;
2952	# endif
2953
2954	rc = PGMShwSyncLongModePDPtr(pVM, GCPtrPage, pPml4eSrc, &PdpeSrc, &pPDDst);
2955	AssertReturn(rc == VINF_SUCCESS /* must test for VINF_SUCCESS!! */, rc);
2956	Assert(pPDDst);
2957	pPdeDst = &pPDDst->a[iPDDst];
2958	# endif
2959	if (!pPdeDst->n.u1Present)
2960	{
2961	rc = PGM_BTH_NAME(SyncPT)(pVM, iPDSrc, pPDSrc, GCPtrPage);
2962	AssertRC(rc);
2963	if (rc != VINF_SUCCESS)
2964	return rc;
2965	}
2966
2967	# if PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE)
2968	/* Check for dirty bit fault */
2969	rc = PGM_BTH_NAME(CheckPageFault)(pVM, uErr, pPdeDst, &pPDSrc->a[iPDSrc], GCPtrPage);
2970	if (rc == VINF_PGM_HANDLED_DIRTY_BIT_FAULT)
2971	Log(("PGMVerifyAccess: success (dirty)\n"));
2972	else
2973	{
2974	GSTPDE PdeSrc = pPDSrc->a[iPDSrc];
2975	#else
2976	{
2977	GSTPDE PdeSrc;
2978	PdeSrc.au32[0] = 0; /* faked so we don't have to #ifdef everything */
2979	PdeSrc.n.u1Present = 1;
2980	PdeSrc.n.u1Write = 1;
2981	PdeSrc.n.u1Accessed = 1;
2982	PdeSrc.n.u1User = 1;
2983
2984	#endif /* PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE) */
2985	Assert(rc != VINF_EM_RAW_GUEST_TRAP);
2986	if (uErr & X86_TRAP_PF_US)
2987	STAM_COUNTER_INC(&pVM->pgm.s.StatGCPageOutOfSyncUser);
2988	else /* supervisor */
2989	STAM_COUNTER_INC(&pVM->pgm.s.StatGCPageOutOfSyncSupervisor);
2990
2991	rc = PGM_BTH_NAME(SyncPage)(pVM, PdeSrc, GCPtrPage, 1, 0);
2992	if (VBOX_SUCCESS(rc))
2993	{
2994	/* Page was successfully synced */
2995	Log2(("PGMVerifyAccess: success (sync)\n"));
2996	rc = VINF_SUCCESS;
2997	}
2998	else
2999	{
3000	Log(("PGMVerifyAccess: access violation for %VGv rc=%d\n", GCPtrPage, rc));
3001	return VINF_EM_RAW_GUEST_TRAP;
3002	}
3003	}
3004	return rc;
3005
3006	#else /* PGM_GST_TYPE != PGM_TYPE_32BIT */
3007
3008	AssertReleaseMsgFailed(("Shw=%d Gst=%d is not implemented!\n", PGM_GST_TYPE, PGM_SHW_TYPE));
3009	return VERR_INTERNAL_ERROR;
3010	#endif /* PGM_GST_TYPE != PGM_TYPE_32BIT */
3011	}
3012
3013
3014	#if PGM_GST_TYPE == PGM_TYPE_32BIT \|\| PGM_GST_TYPE == PGM_TYPE_PAE \|\| PGM_GST_TYPE == PGM_TYPE_AMD64
3015	# if PGM_SHW_TYPE == PGM_TYPE_32BIT \|\| PGM_SHW_TYPE == PGM_TYPE_PAE \|\| PGM_SHW_TYPE == PGM_TYPE_AMD64
3016	/**
3017	* Figures out which kind of shadow page this guest PDE warrants.
3018	*
3019	* @returns Shadow page kind.
3020	* @param pPdeSrc The guest PDE in question.
3021	* @param cr4 The current guest cr4 value.
3022	*/
3023	DECLINLINE(PGMPOOLKIND) PGM_BTH_NAME(CalcPageKind)(const GSTPDE *pPdeSrc, uint32_t cr4)
3024	{
3025	# if PMG_GST_TYPE == PGM_TYPE_AMD64
3026	if (!pPdeSrc->n.u1Size)
3027	# else
3028	if (!pPdeSrc->n.u1Size \|\| !(cr4 & X86_CR4_PSE))
3029	# endif
3030	return BTH_PGMPOOLKIND_PT_FOR_PT;
3031	//switch (pPdeSrc->u & (X86_PDE4M_RW \| X86_PDE4M_US /\| X86_PDE4M_PAE_NX/))
3032	//{
3033	// case 0:
3034	// return BTH_PGMPOOLKIND_PT_FOR_BIG_RO;
3035	// case X86_PDE4M_RW:
3036	// return BTH_PGMPOOLKIND_PT_FOR_BIG_RW;
3037	// case X86_PDE4M_US:
3038	// return BTH_PGMPOOLKIND_PT_FOR_BIG_US;
3039	// case X86_PDE4M_RW \| X86_PDE4M_US:
3040	// return BTH_PGMPOOLKIND_PT_FOR_BIG_RW_US;
3041	# if 0
3042	// case X86_PDE4M_PAE_NX:
3043	// return BTH_PGMPOOLKIND_PT_FOR_BIG_NX;
3044	// case X86_PDE4M_RW \| X86_PDE4M_PAE_NX:
3045	// return BTH_PGMPOOLKIND_PT_FOR_BIG_RW_NX;
3046	// case X86_PDE4M_US \| X86_PDE4M_PAE_NX:
3047	// return BTH_PGMPOOLKIND_PT_FOR_BIG_US_NX;
3048	// case X86_PDE4M_RW \| X86_PDE4M_US \| X86_PDE4M_PAE_NX:
3049	// return BTH_PGMPOOLKIND_PT_FOR_BIG_RW_US_NX;
3050	# endif
3051	return BTH_PGMPOOLKIND_PT_FOR_BIG;
3052	//}
3053	}
3054	# endif
3055	#endif
3056
3057	#undef MY_STAM_COUNTER_INC
3058	#define MY_STAM_COUNTER_INC(a) do { } while (0)
3059
3060
3061	/**
3062	* Syncs the paging hierarchy starting at CR3.
3063	*
3064	* @returns VBox status code, no specials.
3065	* @param pVM The virtual machine.
3066	* @param cr0 Guest context CR0 register
3067	* @param cr3 Guest context CR3 register
3068	* @param cr4 Guest context CR4 register
3069	* @param fGlobal Including global page directories or not
3070	*/
3071	PGM_BTH_DECL(int, SyncCR3)(PVM pVM, uint64_t cr0, uint64_t cr3, uint64_t cr4, bool fGlobal)
3072	{
3073	if (VM_FF_ISSET(pVM, VM_FF_PGM_SYNC_CR3))
3074	fGlobal = true; /* Change this CR3 reload to be a global one. */
3075
3076	#if PGM_SHW_TYPE != PGM_TYPE_NESTED && PGM_SHW_TYPE != PGM_TYPE_EPT
3077	/*
3078	* Update page access handlers.
3079	* The virtual are always flushed, while the physical are only on demand.
3080	* WARNING: We are incorrectly not doing global flushing on Virtual Handler updates. We'll
3081	* have to look into that later because it will have a bad influence on the performance.
3082	* @note SvL: There's no need for that. Just invalidate the virtual range(s).
3083	* bird: Yes, but that won't work for aliases.
3084	*/
3085	/** @todo this MUST go away. See #1557. */
3086	STAM_PROFILE_START(&pVM->pgm.s.CTXMID(Stat,SyncCR3Handlers), h);
3087	PGM_GST_NAME(HandlerVirtualUpdate)(pVM, cr4);
3088	STAM_PROFILE_STOP(&pVM->pgm.s.CTXMID(Stat,SyncCR3Handlers), h);
3089	#endif
3090
3091	#ifdef PGMPOOL_WITH_MONITORING
3092	int rc = pgmPoolSyncCR3(pVM);
3093	if (rc != VINF_SUCCESS)
3094	return rc;
3095	#endif
3096
3097	#if PGM_SHW_TYPE == PGM_TYPE_NESTED \|\| PGM_SHW_TYPE == PGM_TYPE_EPT
3098	/** @todo check if this is really necessary */
3099	HWACCMFlushTLB(pVM);
3100	return VINF_SUCCESS;
3101
3102	#elif PGM_SHW_TYPE == PGM_TYPE_AMD64
3103	/* No need to check all paging levels; we zero out the shadow parts when the guest modifies its tables. */
3104	return VINF_SUCCESS;
3105	#else
3106
3107	Assert(fGlobal \|\| (cr4 & X86_CR4_PGE));
3108	MY_STAM_COUNTER_INC(fGlobal ? &pVM->pgm.s.CTXMID(Stat,SyncCR3Global) : &pVM->pgm.s.CTXMID(Stat,SyncCR3NotGlobal));
3109
3110	# if PGM_GST_TYPE == PGM_TYPE_32BIT \|\| PGM_GST_TYPE == PGM_TYPE_PAE \|\| PGM_GST_TYPE == PGM_TYPE_AMD64
3111	# if PGM_GST_TYPE == PGM_TYPE_AMD64
3112	bool fBigPagesSupported = true;
3113	# else
3114	bool fBigPagesSupported = !!(CPUMGetGuestCR4(pVM) & X86_CR4_PSE);
3115	# endif
3116
3117	/*
3118	* Get page directory addresses.
3119	*/
3120	# if PGM_SHW_TYPE == PGM_TYPE_32BIT
3121	PX86PDE pPDEDst = &pVM->pgm.s.CTXMID(p,32BitPD)->a[0];
3122	# else /* PGM_SHW_TYPE == PGM_TYPE_PAE \|\| PGM_SHW_TYPE == PGM_TYPE_AMD64*/
3123	# if PGM_GST_TYPE == PGM_TYPE_32BIT
3124	PX86PDEPAE pPDEDst = &pVM->pgm.s.CTXMID(ap,PaePDs)[0]->a[0];
3125	# endif
3126	# endif
3127
3128	# if PGM_GST_TYPE == PGM_TYPE_32BIT
3129	PGSTPD pPDSrc = CTXSUFF(pVM->pgm.s.pGuestPD);
3130	Assert(pPDSrc);
3131	# ifndef IN_GC
3132	Assert(PGMPhysGCPhys2HCPtrAssert(pVM, (RTGCPHYS)(cr3 & GST_CR3_PAGE_MASK), sizeof(*pPDSrc)) == pPDSrc);
3133	# endif
3134	# endif
3135
3136	/*
3137	* Iterate the page directory.
3138	*/
3139	PPGMMAPPING pMapping;
3140	unsigned iPdNoMapping;
3141	const bool fRawR0Enabled = EMIsRawRing0Enabled(pVM);
3142	PPGMPOOL pPool = pVM->pgm.s.CTXSUFF(pPool);
3143
3144	/* Only check mappings if they are supposed to be put into the shadow page table. */
3145	if (pgmMapAreMappingsEnabled(&pVM->pgm.s))
3146	{
3147	pMapping = pVM->pgm.s.CTXALLSUFF(pMappings);
3148	iPdNoMapping = (pMapping) ? (pMapping->GCPtr >> GST_PD_SHIFT) : ~0U;
3149	}
3150	else
3151	{
3152	pMapping = 0;
3153	iPdNoMapping = ~0U;
3154	}
3155	# if PGM_GST_TYPE == PGM_TYPE_AMD64
3156	for (uint64_t iPml4e = 0; iPml4e < X86_PG_PAE_ENTRIES; iPml4e++)
3157	{
3158	PPGMPOOLPAGE pShwPdpt = NULL;
3159	PX86PML4E pPml4eSrc, pPml4eDst;
3160	RTGCPHYS GCPhysPdptSrc;
3161
3162	pPml4eSrc = &pVM->pgm.s.CTXSUFF(pGstPaePML4)->a[iPml4e];
3163	pPml4eDst = &pVM->pgm.s.CTXMID(p,PaePML4)->a[iPml4e];
3164
3165	/* Fetch the pgm pool shadow descriptor if the shadow pml4e is present. */
3166	if (!pPml4eDst->n.u1Present)
3167	continue;
3168	pShwPdpt = pgmPoolGetPage(pPool, pPml4eDst->u & X86_PML4E_PG_MASK);
3169
3170	GCPhysPdptSrc = pPml4eSrc->u & X86_PML4E_PG_MASK_FULL;
3171
3172	/* Anything significant changed? */
3173	if ( pPml4eSrc->n.u1Present != pPml4eDst->n.u1Present
3174	\|\| GCPhysPdptSrc != pShwPdpt->GCPhys)
3175	{
3176	/* Free it. */
3177	LogFlow(("SyncCR3: Out-of-sync PML4E (GCPhys) GCPtr=%VGv %VGp vs %VGp PdpeSrc=%RX64 PdpeDst=%RX64\n",
3178	(uint64_t)iPml4e << X86_PML4_SHIFT, pShwPdpt->GCPhys, GCPhysPdptSrc, (uint64_t)pPml4eSrc->u, (uint64_t)pPml4eDst->u));
3179	pgmPoolFreeByPage(pPool, pShwPdpt, pVM->pgm.s.pHCShwAmd64CR3->idx, iPml4e);
3180	pPml4eDst->u = 0;
3181	continue;
3182	}
3183	/* Force an attribute sync. */
3184	pPml4eDst->n.u1User = pPml4eSrc->n.u1User;
3185	pPml4eDst->n.u1Write = pPml4eSrc->n.u1Write;
3186	pPml4eDst->n.u1NoExecute = pPml4eSrc->n.u1NoExecute;
3187
3188	# else
3189	{
3190	# endif
3191	# if PGM_GST_TYPE == PGM_TYPE_PAE \|\| PGM_GST_TYPE == PGM_TYPE_AMD64
3192	for (uint64_t iPdpte = 0; iPdpte < GST_PDPE_ENTRIES; iPdpte++)
3193	{
3194	unsigned iPDSrc;
3195	# if PGM_GST_TYPE == PGM_TYPE_PAE
3196	PX86PDPAE pPDPAE = pVM->pgm.s.CTXMID(ap,PaePDs)[0];
3197	PX86PDEPAE pPDEDst = &pPDPAE->a[iPdpte * X86_PG_PAE_ENTRIES];
3198	PGSTPD pPDSrc = pgmGstGetPaePDPtr(&pVM->pgm.s, iPdpte << X86_PDPT_SHIFT, &iPDSrc);
3199	PX86PDPT pPdptDst = pVM->pgm.s.CTXMID(p,PaePDPT); NOREF(pPdptDst);
3200	X86PDPE PdpeSrc = CTXSUFF(pVM->pgm.s.pGstPaePDPT)->a[iPdpte];
3201
3202	if (pPDSrc == NULL)
3203	{
3204	/* PDPE not present */
3205	if (pVM->pgm.s.CTXMID(p,PaePDPT)->a[iPdpte].n.u1Present)
3206	{
3207	LogFlow(("SyncCR3: guest PDPE %d not present; clear shw pdpe\n", iPdpte));
3208	/* for each page directory entry */
3209	for (unsigned iPD = 0; iPD < RT_ELEMENTS(pPDSrc->a); iPD++)
3210	{
3211	if ( pPDEDst[iPD].n.u1Present
3212	&& !(pPDEDst[iPD].u & PGM_PDFLAGS_MAPPING))
3213	{
3214	pgmPoolFreeByPage(pPool, pgmPoolGetPage(pPool, pPDEDst[iPD].u & SHW_PDE_PG_MASK), SHW_POOL_ROOT_IDX, iPdpte * X86_PG_PAE_ENTRIES + iPD);
3215	pPDEDst[iPD].u = 0;
3216	}
3217	}
3218	}
3219	if (!(pVM->pgm.s.CTXMID(p,PaePDPT)->a[iPdpte].u & PGM_PLXFLAGS_MAPPING))
3220	pVM->pgm.s.CTXMID(p,PaePDPT)->a[iPdpte].n.u1Present = 0;
3221	continue;
3222	}
3223	# else /* PGM_GST_TYPE != PGM_TYPE_PAE */
3224	PPGMPOOLPAGE pShwPde = NULL;
3225	RTGCPHYS GCPhysPdeSrc;
3226	PX86PDPE pPdpeDst;
3227	PX86PML4E pPml4eSrc;
3228	X86PDPE PdpeSrc;
3229	PX86PDPT pPdptDst;
3230	PX86PDPAE pPDDst;
3231	PX86PDEPAE pPDEDst;
3232	RTGCUINTPTR GCPtr = (iPml4e << X86_PML4_SHIFT) \|\| (iPdpte << X86_PDPT_SHIFT);
3233	PGSTPD pPDSrc = pgmGstGetLongModePDPtr(&pVM->pgm.s, GCPtr, &pPml4eSrc, &PdpeSrc, &iPDSrc);
3234
3235	int rc = PGMShwGetLongModePDPtr(pVM, GCPtr, &pPdptDst, &pPDDst);
3236	if (rc != VINF_SUCCESS)
3237	{
3238	if (rc == VERR_PAGE_MAP_LEVEL4_NOT_PRESENT)
3239	break; /* next PML4E */
3240
3241	AssertMsg(rc == VERR_PAGE_DIRECTORY_PTR_NOT_PRESENT, ("Unexpected rc=%Vrc\n", rc));
3242	continue; /* next PDPTE */
3243	}
3244	Assert(pPDDst);
3245	pPDEDst = &pPDDst->a[0];
3246	Assert(iPDSrc == 0);
3247
3248	pPdpeDst = &pPdptDst->a[iPdpte];
3249
3250	/* Fetch the pgm pool shadow descriptor if the shadow pdpte is present. */
3251	if (!pPdpeDst->n.u1Present)
3252	continue; /* next PDPTE */
3253
3254	pShwPde = pgmPoolGetPage(pPool, pPdpeDst->u & X86_PDPE_PG_MASK);
3255	GCPhysPdeSrc = PdpeSrc.u & X86_PDPE_PG_MASK;
3256
3257	/* Anything significant changed? */
3258	if ( PdpeSrc.n.u1Present != pPdpeDst->n.u1Present
3259	\|\| GCPhysPdeSrc != pShwPde->GCPhys)
3260	{
3261	/* Free it. */
3262	LogFlow(("SyncCR3: Out-of-sync PDPE (GCPhys) GCPtr=%VGv %VGp vs %VGp PdpeSrc=%RX64 PdpeDst=%RX64\n",
3263	((uint64_t)iPml4e << X86_PML4_SHIFT) + ((uint64_t)iPdpte << X86_PDPT_SHIFT), pShwPde->GCPhys, GCPhysPdeSrc, (uint64_t)PdpeSrc.u, (uint64_t)pPdpeDst->u));
3264
3265	/* Mark it as not present if there's no hypervisor mapping present. (bit flipped at the top of Trap0eHandler) */
3266	Assert(!(pPdpeDst->u & PGM_PLXFLAGS_MAPPING));
3267	pgmPoolFreeByPage(pPool, pShwPde, pShwPde->idx, iPdpte);
3268	pPdpeDst->u = 0;
3269	continue; /* next guest PDPTE */
3270	}
3271	/* Force an attribute sync. */
3272	pPdpeDst->lm.u1User = PdpeSrc.lm.u1User;
3273	pPdpeDst->lm.u1Write = PdpeSrc.lm.u1Write;
3274	pPdpeDst->lm.u1NoExecute = PdpeSrc.lm.u1NoExecute;
3275	# endif /* PGM_GST_TYPE != PGM_TYPE_PAE */
3276
3277	# else /* PGM_GST_TYPE != PGM_TYPE_PAE && PGM_GST_TYPE != PGM_TYPE_AMD64 */
3278	{
3279	# endif /* PGM_GST_TYPE != PGM_TYPE_PAE && PGM_GST_TYPE != PGM_TYPE_AMD64 */
3280	for (unsigned iPD = 0; iPD < RT_ELEMENTS(pPDSrc->a); iPD++)
3281	{
3282	# if PGM_SHW_TYPE == PGM_TYPE_32BIT
3283	Assert(&pVM->pgm.s.CTXMID(p,32BitPD)->a[iPD] == pPDEDst);
3284	# elif PGM_SHW_TYPE == PGM_TYPE_PAE && PGM_GST_TYPE == PGM_TYPE_32BIT
3285	AssertMsg(&pVM->pgm.s.CTXMID(ap,PaePDs)[iPD * 2 / 512]->a[iPD * 2 % 512] == pPDEDst, ("%p vs %p\n", &pVM->pgm.s.CTXMID(ap,PaePDs)[iPD * 2 / 512]->a[iPD * 2 % 512], pPDEDst));
3286	# endif
3287	register GSTPDE PdeSrc = pPDSrc->a[iPD];
3288	if ( PdeSrc.n.u1Present
3289	&& (PdeSrc.n.u1User \|\| fRawR0Enabled))
3290	{
3291	# if ( PGM_GST_TYPE == PGM_TYPE_32BIT \
3292	\|\| PGM_GST_TYPE == PGM_TYPE_PAE) \
3293	&& !defined(PGM_WITHOUT_MAPPINGS)
3294
3295	/*
3296	* Check for conflicts with GC mappings.
3297	*/
3298	# if PGM_GST_TYPE == PGM_TYPE_PAE
3299	if (iPD + iPdpte * X86_PG_PAE_ENTRIES == iPdNoMapping)
3300	# else
3301	if (iPD == iPdNoMapping)
3302	# endif
3303	{
3304	if (pVM->pgm.s.fMappingsFixed)
3305	{
3306	/* It's fixed, just skip the mapping. */
3307	const unsigned cPTs = pMapping->cb >> GST_PD_SHIFT;
3308	iPD += cPTs - 1;
3309	pPDEDst += cPTs + (PGM_GST_TYPE != PGM_SHW_TYPE) * cPTs; /* Only applies to the pae shadow and 32 bits guest case */
3310	pMapping = pMapping->CTXALLSUFF(pNext);
3311	iPdNoMapping = pMapping ? pMapping->GCPtr >> GST_PD_SHIFT : ~0U;
3312	continue;
3313	}
3314	# ifdef IN_RING3
3315	# if PGM_GST_TYPE == PGM_TYPE_32BIT
3316	int rc = pgmR3SyncPTResolveConflict(pVM, pMapping, pPDSrc, iPD << GST_PD_SHIFT);
3317	# elif PGM_GST_TYPE == PGM_TYPE_PAE
3318	int rc = pgmR3SyncPTResolveConflictPAE(pVM, pMapping, (iPdpte << GST_PDPT_SHIFT) + (iPD << GST_PD_SHIFT));
3319	# endif
3320	if (VBOX_FAILURE(rc))
3321	return rc;
3322
3323	/*
3324	* Update iPdNoMapping and pMapping.
3325	*/
3326	pMapping = pVM->pgm.s.pMappingsR3;
3327	while (pMapping && pMapping->GCPtr < (iPD << GST_PD_SHIFT))
3328	pMapping = pMapping->pNextR3;
3329	iPdNoMapping = pMapping ? pMapping->GCPtr >> GST_PD_SHIFT : ~0U;
3330	# else
3331	LogFlow(("SyncCR3: detected conflict -> VINF_PGM_SYNC_CR3\n"));
3332	return VINF_PGM_SYNC_CR3;
3333	# endif
3334	}
3335	# else /* (PGM_GST_TYPE != PGM_TYPE_32BIT && PGM_GST_TYPE != PGM_TYPE_PAE) \|\| PGM_WITHOUT_MAPPINGS */
3336	Assert(!pgmMapAreMappingsEnabled(&pVM->pgm.s));
3337	# endif /* (PGM_GST_TYPE != PGM_TYPE_32BIT && PGM_GST_TYPE != PGM_TYPE_PAE) \|\| PGM_WITHOUT_MAPPINGS */
3338	/*
3339	* Sync page directory entry.
3340	*
3341	* The current approach is to allocated the page table but to set
3342	* the entry to not-present and postpone the page table synching till
3343	* it's actually used.
3344	*/
3345	# if PGM_SHW_TYPE == PGM_TYPE_PAE && PGM_GST_TYPE == PGM_TYPE_32BIT
3346	for (unsigned i = 0, iPdShw = iPD * 2; i < 2; i++, iPdShw++) /* pray that the compiler unrolls this */
3347	# elif PGM_GST_TYPE == PGM_TYPE_PAE
3348	const unsigned iPdShw = iPD + iPdpte * X86_PG_PAE_ENTRIES; NOREF(iPdShw);
3349	# else
3350	const unsigned iPdShw = iPD; NOREF(iPdShw);
3351	# endif
3352	{
3353	SHWPDE PdeDst = *pPDEDst;
3354	if (PdeDst.n.u1Present)
3355	{
3356	PPGMPOOLPAGE pShwPage = pgmPoolGetPage(pPool, PdeDst.u & SHW_PDE_PG_MASK);
3357	RTGCPHYS GCPhys;
3358	if ( !PdeSrc.b.u1Size
3359	\|\| !fBigPagesSupported)
3360	{
3361	GCPhys = PdeSrc.u & GST_PDE_PG_MASK;
3362	# if PGM_SHW_TYPE == PGM_TYPE_PAE && PGM_GST_TYPE == PGM_TYPE_32BIT
3363	/* Select the right PDE as we're emulating a 4kb page table with 2 shadow page tables. */
3364	GCPhys \|= i * (PAGE_SIZE / 2);
3365	# endif
3366	}
3367	else
3368	{
3369	GCPhys = GST_GET_PDE_BIG_PG_GCPHYS(PdeSrc);
3370	# if PGM_SHW_TYPE == PGM_TYPE_PAE && PGM_GST_TYPE == PGM_TYPE_32BIT
3371	/* Select the right PDE as we're emulating a 4MB page directory with two 2 MB shadow PDEs.*/
3372	GCPhys \|= i * X86_PAGE_2M_SIZE;
3373	# endif
3374	}
3375
3376	if ( pShwPage->GCPhys == GCPhys
3377	&& pShwPage->enmKind == PGM_BTH_NAME(CalcPageKind)(&PdeSrc, cr4)
3378	&& ( pShwPage->fCached
3379	\|\| ( !fGlobal
3380	&& ( false
3381	# ifdef PGM_SKIP_GLOBAL_PAGEDIRS_ON_NONGLOBAL_FLUSH
3382	\|\| ( (PdeSrc.u & (X86_PDE4M_PS \| X86_PDE4M_G)) == (X86_PDE4M_PS \| X86_PDE4M_G)
3383	# if PGM_GST_TYPE == PGM_TYPE_AMD64
3384	&& (cr4 & X86_CR4_PGE)) /* global 2/4MB page. */
3385	# else
3386	&& (cr4 & (X86_CR4_PGE \| X86_CR4_PSE)) == (X86_CR4_PGE \| X86_CR4_PSE)) /* global 2/4MB page. */
3387	# endif
3388	\|\| ( !pShwPage->fSeenNonGlobal
3389	&& (cr4 & X86_CR4_PGE))
3390	# endif
3391	)
3392	)
3393	)
3394	&& ( (PdeSrc.u & (X86_PDE_US \| X86_PDE_RW)) == (PdeDst.u & (X86_PDE_US \| X86_PDE_RW))
3395	\|\| ( fBigPagesSupported
3396	&& ((PdeSrc.u & (X86_PDE_US \| X86_PDE4M_PS \| X86_PDE4M_D)) \| PGM_PDFLAGS_TRACK_DIRTY)
3397	== ((PdeDst.u & (X86_PDE_US \| X86_PDE_RW \| PGM_PDFLAGS_TRACK_DIRTY)) \| X86_PDE4M_PS))
3398	)
3399	)
3400	{
3401	# ifdef VBOX_WITH_STATISTICS
3402	if ( !fGlobal
3403	&& (PdeSrc.u & (X86_PDE4M_PS \| X86_PDE4M_G)) == (X86_PDE4M_PS \| X86_PDE4M_G)
3404	# if PGM_GST_TYPE == PGM_TYPE_AMD64
3405	&& (cr4 & X86_CR4_PGE)) /* global 2/4MB page. */
3406	# else
3407	&& (cr4 & (X86_CR4_PGE \| X86_CR4_PSE)) == (X86_CR4_PGE \| X86_CR4_PSE))
3408	# endif
3409	MY_STAM_COUNTER_INC(&pVM->pgm.s.CTXMID(Stat,SyncCR3DstSkippedGlobalPD));
3410	else if (!fGlobal && !pShwPage->fSeenNonGlobal && (cr4 & X86_CR4_PGE))
3411	MY_STAM_COUNTER_INC(&pVM->pgm.s.CTXMID(Stat,SyncCR3DstSkippedGlobalPT));
3412	else
3413	MY_STAM_COUNTER_INC(&pVM->pgm.s.CTXMID(Stat,SyncCR3DstCacheHit));
3414	# endif /* VBOX_WITH_STATISTICS */
3415	/** @todo a replacement strategy isn't really needed unless we're using a very small pool < 512 pages.
3416	* The whole ageing stuff should be put in yet another set of #ifdefs. For now, let's just skip it. */
3417	//# ifdef PGMPOOL_WITH_CACHE
3418	// pgmPoolCacheUsed(pPool, pShwPage);
3419	//# endif
3420	}
3421	else
3422	{
3423	# if PGM_GST_TYPE == PGM_TYPE_AMD64
3424	pgmPoolFreeByPage(pPool, pShwPage, pShwPde->idx, iPdShw);
3425	# else
3426	pgmPoolFreeByPage(pPool, pShwPage, SHW_POOL_ROOT_IDX, iPdShw);
3427	# endif
3428	pPDEDst->u = 0;
3429	MY_STAM_COUNTER_INC(&pVM->pgm.s.CTXMID(Stat,SyncCR3DstFreed));
3430	}
3431	}
3432	else
3433	MY_STAM_COUNTER_INC(&pVM->pgm.s.CTXMID(Stat,SyncCR3DstNotPresent));
3434	pPDEDst++;
3435	}
3436	}
3437	# if PGM_GST_TYPE == PGM_TYPE_PAE
3438	else if (iPD + iPdpte * X86_PG_PAE_ENTRIES != iPdNoMapping)
3439	# else
3440	else if (iPD != iPdNoMapping)
3441	# endif
3442	{
3443	/*
3444	* Check if there is any page directory to mark not present here.
3445	*/
3446	# if PGM_SHW_TYPE == PGM_TYPE_PAE && PGM_GST_TYPE == PGM_TYPE_32BIT
3447	for (unsigned i = 0, iPdShw = iPD * 2; i < 2; i++, iPdShw++) /* pray that the compiler unrolls this */
3448	# elif PGM_GST_TYPE == PGM_TYPE_PAE
3449	const unsigned iPdShw = iPD + iPdpte * X86_PG_PAE_ENTRIES; NOREF(iPdShw);
3450	# else
3451	const unsigned iPdShw = iPD; NOREF(iPdShw);
3452	# endif
3453	{
3454	if (pPDEDst->n.u1Present)
3455	{
3456	# if PGM_GST_TYPE == PGM_TYPE_AMD64
3457	pgmPoolFreeByPage(pPool, pgmPoolGetPage(pPool, pPDEDst->u & SHW_PDE_PG_MASK), pShwPde->idx, iPdShw);
3458	# else
3459	pgmPoolFreeByPage(pPool, pgmPoolGetPage(pPool, pPDEDst->u & SHW_PDE_PG_MASK), SHW_POOL_ROOT_IDX, iPdShw);
3460	# endif
3461	pPDEDst->u = 0;
3462	MY_STAM_COUNTER_INC(&pVM->pgm.s.CTXMID(Stat,SyncCR3DstFreedSrcNP));
3463	}
3464	pPDEDst++;
3465	}
3466	}
3467	else
3468	{
3469	# if ( PGM_GST_TYPE == PGM_TYPE_32BIT \
3470	\|\| PGM_GST_TYPE == PGM_TYPE_PAE) \
3471	&& !defined(PGM_WITHOUT_MAPPINGS)
3472
3473	const unsigned cPTs = pMapping->cb >> GST_PD_SHIFT;
3474
3475	Assert(pgmMapAreMappingsEnabled(&pVM->pgm.s));
3476	if (pVM->pgm.s.fMappingsFixed)
3477	{
3478	/* It's fixed, just skip the mapping. */
3479	pMapping = pMapping->CTXALLSUFF(pNext);
3480	iPdNoMapping = pMapping ? pMapping->GCPtr >> GST_PD_SHIFT : ~0U;
3481	}
3482	else
3483	{
3484	/*
3485	* Check for conflicts for subsequent pagetables
3486	* and advance to the next mapping.
3487	*/
3488	iPdNoMapping = ~0U;
3489	unsigned iPT = cPTs;
3490	while (iPT-- > 1)
3491	{
3492	if ( pPDSrc->a[iPD + iPT].n.u1Present
3493	&& (pPDSrc->a[iPD + iPT].n.u1User \|\| fRawR0Enabled))
3494	{
3495	# ifdef IN_RING3
3496	# if PGM_GST_TYPE == PGM_TYPE_32BIT
3497	int rc = pgmR3SyncPTResolveConflict(pVM, pMapping, pPDSrc, iPD << GST_PD_SHIFT);
3498	# elif PGM_GST_TYPE == PGM_TYPE_PAE
3499	int rc = pgmR3SyncPTResolveConflictPAE(pVM, pMapping, (iPdpte << GST_PDPT_SHIFT) + (iPD << GST_PD_SHIFT));
3500	# endif
3501	if (VBOX_FAILURE(rc))
3502	return rc;
3503
3504	/*
3505	* Update iPdNoMapping and pMapping.
3506	*/
3507	pMapping = pVM->pgm.s.CTXALLSUFF(pMappings);
3508	while (pMapping && pMapping->GCPtr < (iPD << GST_PD_SHIFT))
3509	pMapping = pMapping->CTXALLSUFF(pNext);
3510	iPdNoMapping = pMapping ? pMapping->GCPtr >> GST_PD_SHIFT : ~0U;
3511	break;
3512	# else
3513	LogFlow(("SyncCR3: detected conflict -> VINF_PGM_SYNC_CR3\n"));
3514	return VINF_PGM_SYNC_CR3;
3515	# endif
3516	}
3517	}
3518	if (iPdNoMapping == ~0U && pMapping)
3519	{
3520	pMapping = pMapping->CTXALLSUFF(pNext);
3521	if (pMapping)
3522	iPdNoMapping = pMapping->GCPtr >> GST_PD_SHIFT;
3523	}
3524	}
3525
3526	/* advance. */
3527	iPD += cPTs - 1;
3528	pPDEDst += cPTs + (PGM_GST_TYPE != PGM_SHW_TYPE) * cPTs; /* Only applies to the pae shadow and 32 bits guest case */
3529	# if PGM_GST_TYPE != PGM_SHW_TYPE
3530	AssertCompile(PGM_GST_TYPE == PGM_TYPE_32BIT && PGM_SHW_TYPE == PGM_TYPE_PAE);
3531	# endif
3532	# else /* (PGM_GST_TYPE != PGM_TYPE_32BIT && PGM_GST_TYPE != PGM_TYPE_PAE) \|\| PGM_WITHOUT_MAPPINGS */
3533	Assert(!pgmMapAreMappingsEnabled(&pVM->pgm.s));
3534	# endif /* (PGM_GST_TYPE != PGM_TYPE_32BIT && PGM_GST_TYPE != PGM_TYPE_PAE) \|\| PGM_WITHOUT_MAPPINGS */
3535	}
3536
3537	} /* for iPD */
3538	} /* for each PDPTE (PAE) */
3539	} /* for each page map level 4 entry (amd64) */
3540	return VINF_SUCCESS;
3541
3542	# else /* guest real and protected mode */
3543	return VINF_SUCCESS;
3544	# endif
3545	#endif /* PGM_SHW_TYPE != PGM_TYPE_NESTED && PGM_SHW_TYPE != PGM_TYPE_EPT */
3546	}
3547
3548
3549
3550
3551	#ifdef VBOX_STRICT
3552	#ifdef IN_GC
3553	# undef AssertMsgFailed
3554	# define AssertMsgFailed Log
3555	#endif
3556	#ifdef IN_RING3
3557	# include <VBox/dbgf.h>
3558
3559	/**
3560	* Dumps a page table hierarchy use only physical addresses and cr4/lm flags.
3561	*
3562	* @returns VBox status code (VINF_SUCCESS).
3563	* @param pVM The VM handle.
3564	* @param cr3 The root of the hierarchy.
3565	* @param crr The cr4, only PAE and PSE is currently used.
3566	* @param fLongMode Set if long mode, false if not long mode.
3567	* @param cMaxDepth Number of levels to dump.
3568	* @param pHlp Pointer to the output functions.
3569	*/
3570	__BEGIN_DECLS
3571	VMMR3DECL(int) PGMR3DumpHierarchyHC(PVM pVM, uint32_t cr3, uint32_t cr4, bool fLongMode, unsigned cMaxDepth, PCDBGFINFOHLP pHlp);
3572	__END_DECLS
3573
3574	#endif
3575
3576	/**
3577	* Checks that the shadow page table is in sync with the guest one.
3578	*
3579	* @returns The number of errors.
3580	* @param pVM The virtual machine.
3581	* @param cr3 Guest context CR3 register
3582	* @param cr4 Guest context CR4 register
3583	* @param GCPtr Where to start. Defaults to 0.
3584	* @param cb How much to check. Defaults to everything.
3585	*/
3586	PGM_BTH_DECL(unsigned, AssertCR3)(PVM pVM, uint64_t cr3, uint64_t cr4, RTGCUINTPTR GCPtr, RTGCUINTPTR cb)
3587	{
3588	#if PGM_SHW_TYPE == PGM_TYPE_NESTED \|\| PGM_SHW_TYPE == PGM_TYPE_EPT
3589	return 0;
3590	#else
3591	unsigned cErrors = 0;
3592
3593	#if PGM_GST_TYPE == PGM_TYPE_PAE
3594	/* @todo currently broken; crashes below somewhere */
3595	AssertFailed();
3596	#endif
3597
3598	#if PGM_GST_TYPE == PGM_TYPE_32BIT \
3599	\|\| PGM_GST_TYPE == PGM_TYPE_PAE \
3600	\|\| PGM_GST_TYPE == PGM_TYPE_AMD64
3601
3602	# if PGM_GST_TYPE == PGM_TYPE_AMD64
3603	bool fBigPagesSupported = true;
3604	# else
3605	bool fBigPagesSupported = !!(CPUMGetGuestCR4(pVM) & X86_CR4_PSE);
3606	# endif
3607	PPGM pPGM = &pVM->pgm.s;
3608	RTGCPHYS GCPhysGst; /* page address derived from the guest page tables. */
3609	RTHCPHYS HCPhysShw; /* page address derived from the shadow page tables. */
3610	# ifndef IN_RING0
3611	RTHCPHYS HCPhys; /* general usage. */
3612	# endif
3613	int rc;
3614
3615	/*
3616	* Check that the Guest CR3 and all its mappings are correct.
3617	*/
3618	AssertMsgReturn(pPGM->GCPhysCR3 == (cr3 & GST_CR3_PAGE_MASK),
3619	("Invalid GCPhysCR3=%VGp cr3=%VGp\n", pPGM->GCPhysCR3, (RTGCPHYS)cr3),
3620	false);
3621	# if !defined(IN_RING0) && PGM_GST_TYPE != PGM_TYPE_AMD64
3622	# if PGM_GST_TYPE == PGM_TYPE_32BIT
3623	rc = PGMShwGetPage(pVM, (RTGCPTR)pPGM->pGuestPDGC, NULL, &HCPhysShw);
3624	# else
3625	rc = PGMShwGetPage(pVM, (RTGCPTR)pPGM->pGstPaePDPTGC, NULL, &HCPhysShw);
3626	# endif
3627	AssertRCReturn(rc, 1);
3628	HCPhys = NIL_RTHCPHYS;
3629	rc = pgmRamGCPhys2HCPhys(pPGM, cr3 & GST_CR3_PAGE_MASK, &HCPhys);
3630	AssertMsgReturn(HCPhys == HCPhysShw, ("HCPhys=%VHp HCPhyswShw=%VHp (cr3)\n", HCPhys, HCPhysShw), false);
3631	# if PGM_GST_TYPE == PGM_TYPE_32BIT && defined(IN_RING3)
3632	RTGCPHYS GCPhys;
3633	rc = PGMR3DbgHCPtr2GCPhys(pVM, pPGM->pGuestPDHC, &GCPhys);
3634	AssertRCReturn(rc, 1);
3635	AssertMsgReturn((cr3 & GST_CR3_PAGE_MASK) == GCPhys, ("GCPhys=%VGp cr3=%VGp\n", GCPhys, (RTGCPHYS)cr3), false);
3636	# endif
3637	#endif /* !IN_RING0 */
3638
3639	/*
3640	* Get and check the Shadow CR3.
3641	*/
3642	# if PGM_SHW_TYPE == PGM_TYPE_32BIT
3643	unsigned cPDEs = X86_PG_ENTRIES;
3644	unsigned ulIncrement = X86_PG_ENTRIES * PAGE_SIZE;
3645	# elif PGM_SHW_TYPE == PGM_TYPE_PAE
3646	# if PGM_GST_TYPE == PGM_TYPE_32BIT
3647	unsigned cPDEs = X86_PG_PAE_ENTRIES * 4; /* treat it as a 2048 entry table. */
3648	# else
3649	unsigned cPDEs = X86_PG_PAE_ENTRIES;
3650	# endif
3651	unsigned ulIncrement = X86_PG_PAE_ENTRIES * PAGE_SIZE;
3652	# elif PGM_SHW_TYPE == PGM_TYPE_AMD64
3653	unsigned cPDEs = X86_PG_PAE_ENTRIES;
3654	unsigned ulIncrement = X86_PG_PAE_ENTRIES * PAGE_SIZE;
3655	# endif
3656	if (cb != ~(RTGCUINTPTR)0)
3657	cPDEs = RT_MIN(cb >> SHW_PD_SHIFT, 1);
3658
3659	/** @todo call the other two PGMAssert() functions. /
3660
3661	# if PGM_GST_TYPE == PGM_TYPE_AMD64 \|\| PGM_GST_TYPE == PGM_TYPE_PAE
3662	PPGMPOOL pPool = pVM->pgm.s.CTXSUFF(pPool);
3663	# endif
3664
3665	# if PGM_GST_TYPE == PGM_TYPE_AMD64
3666	unsigned iPml4e = (GCPtr >> X86_PML4_SHIFT) & X86_PML4_MASK;
3667
3668	for (; iPml4e < X86_PG_PAE_ENTRIES; iPml4e++)
3669	{
3670	PPGMPOOLPAGE pShwPdpt = NULL;
3671	PX86PML4E pPml4eSrc, pPml4eDst;
3672	RTGCPHYS GCPhysPdptSrc;
3673
3674	pPml4eSrc = &pVM->pgm.s.CTXSUFF(pGstPaePML4)->a[iPml4e];
3675	pPml4eDst = &pVM->pgm.s.CTXMID(p,PaePML4)->a[iPml4e];
3676
3677	/* Fetch the pgm pool shadow descriptor if the shadow pml4e is present. */
3678	if (!pPml4eDst->n.u1Present)
3679	{
3680	GCPtr += UINT64_C(_2M * 512 * 512);
3681	continue;
3682	}
3683
3684	# if PGM_GST_TYPE == PGM_TYPE_PAE
3685	/* not correct to call pgmPoolGetPage */
3686	AssertFailed();
3687	# endif
3688	pShwPdpt = pgmPoolGetPage(pPool, pPml4eDst->u & X86_PML4E_PG_MASK);
3689	GCPhysPdptSrc = pPml4eSrc->u & X86_PML4E_PG_MASK_FULL;
3690
3691	if (pPml4eSrc->n.u1Present != pPml4eDst->n.u1Present)
3692	{
3693	AssertMsgFailed(("Present bit doesn't match! pPml4eDst.u=%#RX64 pPml4eSrc.u=%RX64\n", pPml4eDst->u, pPml4eSrc->u));
3694	GCPtr += UINT64_C(_2M * 512 * 512);
3695	cErrors++;
3696	continue;
3697	}
3698
3699	if (GCPhysPdptSrc != pShwPdpt->GCPhys)
3700	{
3701	AssertMsgFailed(("Physical address doesn't match! iPml4e %d pPml4eDst.u=%#RX64 pPml4eSrc.u=%RX64 Phys %RX64 vs %RX64\n", iPml4e, pPml4eDst->u, pPml4eSrc->u, pShwPdpt->GCPhys, GCPhysPdptSrc));
3702	GCPtr += UINT64_C(_2M * 512 * 512);
3703	cErrors++;
3704	continue;
3705	}
3706
3707	if ( pPml4eDst->n.u1User != pPml4eSrc->n.u1User
3708	\|\| pPml4eDst->n.u1Write != pPml4eSrc->n.u1Write
3709	\|\| pPml4eDst->n.u1NoExecute != pPml4eSrc->n.u1NoExecute)
3710	{
3711	AssertMsgFailed(("User/Write/NoExec bits don't match! pPml4eDst.u=%#RX64 pPml4eSrc.u=%RX64\n", pPml4eDst->u, pPml4eSrc->u));
3712	GCPtr += UINT64_C(_2M * 512 * 512);
3713	cErrors++;
3714	continue;
3715	}
3716	# else
3717	{
3718	# endif
3719
3720	# if PGM_GST_TYPE == PGM_TYPE_AMD64 \|\| PGM_GST_TYPE == PGM_TYPE_PAE
3721	/*
3722	* Check the PDPTEs too.
3723	*/
3724	unsigned iPdpte = (GCPtr >> SHW_PDPT_SHIFT) & SHW_PDPT_MASK;
3725
3726	for (;iPdpte <= SHW_PDPT_MASK; iPdpte++)
3727	{
3728	unsigned iPDSrc;
3729	PPGMPOOLPAGE pShwPde = NULL;
3730	PX86PDPE pPdpeDst;
3731	RTGCPHYS GCPhysPdeSrc;
3732	# if PGM_GST_TYPE == PGM_TYPE_PAE
3733	PX86PDPAE pPDDst = pVM->pgm.s.CTXMID(ap,PaePDs)[0];
3734	PGSTPD pPDSrc = pgmGstGetPaePDPtr(&pVM->pgm.s, GCPtr, &iPDSrc);
3735	PX86PDPT pPdptDst = pVM->pgm.s.CTXMID(p,PaePDPT);
3736	X86PDPE PdpeSrc = CTXSUFF(pVM->pgm.s.pGstPaePDPT)->a[iPdpte];
3737	# else
3738	PX86PML4E pPml4eSrc;
3739	X86PDPE PdpeSrc;
3740	PX86PDPT pPdptDst;
3741	PX86PDPAE pPDDst;
3742	PGSTPD pPDSrc = pgmGstGetLongModePDPtr(&pVM->pgm.s, GCPtr, &pPml4eSrc, &PdpeSrc, &iPDSrc);
3743
3744	rc = PGMShwGetLongModePDPtr(pVM, GCPtr, &pPdptDst, &pPDDst);
3745	if (rc != VINF_SUCCESS)
3746	{
3747	AssertMsg(rc == VERR_PAGE_DIRECTORY_PTR_NOT_PRESENT, ("Unexpected rc=%Vrc\n", rc));
3748	GCPtr += 512 * _2M;
3749	continue; /* next PDPTE */
3750	}
3751	Assert(pPDDst);
3752	# endif
3753	Assert(iPDSrc == 0);
3754
3755	pPdpeDst = &pPdptDst->a[iPdpte];
3756
3757	if (!pPdpeDst->n.u1Present)
3758	{
3759	GCPtr += 512 * _2M;
3760	continue; /* next PDPTE */
3761	}
3762
3763	pShwPde = pgmPoolGetPage(pPool, pPdpeDst->u & X86_PDPE_PG_MASK);
3764	GCPhysPdeSrc = PdpeSrc.u & X86_PDPE_PG_MASK;
3765
3766	if (pPdpeDst->n.u1Present != PdpeSrc.n.u1Present)
3767	{
3768	AssertMsgFailed(("Present bit doesn't match! pPdpeDst.u=%#RX64 pPdpeSrc.u=%RX64\n", pPdpeDst->u, PdpeSrc.u));
3769	GCPtr += 512 * _2M;
3770	cErrors++;
3771	continue;
3772	}
3773
3774	if (GCPhysPdeSrc != pShwPde->GCPhys)
3775	{
3776	# if PGM_GST_TYPE == PGM_TYPE_AMD64
3777	AssertMsgFailed(("Physical address doesn't match! iPml4e %d iPdpte %d pPdpeDst.u=%#RX64 pPdpeSrc.u=%RX64 Phys %RX64 vs %RX64\n", iPml4e, iPdpte, pPdpeDst->u, PdpeSrc.u, pShwPde->GCPhys, GCPhysPdeSrc));
3778	# else
3779	AssertMsgFailed(("Physical address doesn't match! iPdpte %d pPdpeDst.u=%#RX64 pPdpeSrc.u=%RX64 Phys %RX64 vs %RX64\n", iPdpte, pPdpeDst->u, PdpeSrc.u, pShwPde->GCPhys, GCPhysPdeSrc));
3780	# endif
3781	GCPtr += 512 * _2M;
3782	cErrors++;
3783	continue;
3784	}
3785
3786	# if PGM_GST_TYPE == PGM_TYPE_AMD64
3787	if ( pPdpeDst->lm.u1User != PdpeSrc.lm.u1User
3788	\|\| pPdpeDst->lm.u1Write != PdpeSrc.lm.u1Write
3789	\|\| pPdpeDst->lm.u1NoExecute != PdpeSrc.lm.u1NoExecute)
3790	{
3791	AssertMsgFailed(("User/Write/NoExec bits don't match! pPdpeDst.u=%#RX64 pPdpeSrc.u=%RX64\n", pPdpeDst->u, PdpeSrc.u));
3792	GCPtr += 512 * _2M;
3793	cErrors++;
3794	continue;
3795	}
3796	# endif
3797
3798	# else
3799	{
3800	# endif
3801	# if PGM_GST_TYPE == PGM_TYPE_32BIT
3802	const GSTPD *pPDSrc = CTXSUFF(pPGM->pGuestPD);
3803	# if PGM_SHW_TYPE == PGM_TYPE_32BIT
3804	const X86PD *pPDDst = pPGM->CTXMID(p,32BitPD);
3805	# else
3806	const PX86PDPAE pPDDst = pVM->pgm.s.CTXMID(ap,PaePDs)[0]; /* We treat this as a PD with 2048 entries, so no need to and with SHW_PD_MASK to get iPDDst */
3807	# endif
3808	# endif
3809	/*
3810	* Iterate the shadow page directory.
3811	*/
3812	GCPtr = (GCPtr >> SHW_PD_SHIFT) << SHW_PD_SHIFT;
3813	unsigned iPDDst = (GCPtr >> SHW_PD_SHIFT) & SHW_PD_MASK;
3814
3815	for (;
3816	iPDDst < cPDEs;
3817	iPDDst++, GCPtr += ulIncrement)
3818	{
3819	const SHWPDE PdeDst = pPDDst->a[iPDDst];
3820	if (PdeDst.u & PGM_PDFLAGS_MAPPING)
3821	{
3822	Assert(pgmMapAreMappingsEnabled(&pVM->pgm.s));
3823	if ((PdeDst.u & X86_PDE_AVL_MASK) != PGM_PDFLAGS_MAPPING)
3824	{
3825	AssertMsgFailed(("Mapping shall only have PGM_PDFLAGS_MAPPING set! PdeDst.u=%#RX64\n", (uint64_t)PdeDst.u));
3826	cErrors++;
3827	continue;
3828	}
3829	}
3830	else if ( (PdeDst.u & X86_PDE_P)
3831	\|\| ((PdeDst.u & (X86_PDE_P \| PGM_PDFLAGS_TRACK_DIRTY)) == (X86_PDE_P \| PGM_PDFLAGS_TRACK_DIRTY))
3832	)
3833	{
3834	HCPhysShw = PdeDst.u & SHW_PDE_PG_MASK;
3835	PPGMPOOLPAGE pPoolPage = pgmPoolGetPageByHCPhys(pVM, HCPhysShw);
3836	if (!pPoolPage)
3837	{
3838	AssertMsgFailed(("Invalid page table address %VGp at %VGv! PdeDst=%#RX64\n",
3839	HCPhysShw, GCPtr, (uint64_t)PdeDst.u));
3840	cErrors++;
3841	continue;
3842	}
3843	const SHWPT pPTDst = (const SHWPT )PGMPOOL_PAGE_2_PTR(pVM, pPoolPage);
3844
3845	if (PdeDst.u & (X86_PDE4M_PWT \| X86_PDE4M_PCD))
3846	{
3847	AssertMsgFailed(("PDE flags PWT and/or PCD is set at %VGv! These flags are not virtualized! PdeDst=%#RX64\n",
3848	GCPtr, (uint64_t)PdeDst.u));
3849	cErrors++;
3850	}
3851
3852	if (PdeDst.u & (X86_PDE4M_G \| X86_PDE4M_D))
3853	{
3854	AssertMsgFailed(("4K PDE reserved flags at %VGv! PdeDst=%#RX64\n",
3855	GCPtr, (uint64_t)PdeDst.u));
3856	cErrors++;
3857	}
3858
3859	const GSTPDE PdeSrc = pPDSrc->a[(iPDDst >> (GST_PD_SHIFT - SHW_PD_SHIFT)) & GST_PD_MASK];
3860	if (!PdeSrc.n.u1Present)
3861	{
3862	AssertMsgFailed(("Guest PDE at %VGv is not present! PdeDst=%#RX64 PdeSrc=%#RX64\n",
3863	GCPtr, (uint64_t)PdeDst.u, (uint64_t)PdeSrc.u));
3864	cErrors++;
3865	continue;
3866	}
3867
3868	if ( !PdeSrc.b.u1Size
3869	\|\| !fBigPagesSupported)
3870	{
3871	GCPhysGst = PdeSrc.u & GST_PDE_PG_MASK;
3872	# if PGM_SHW_TYPE == PGM_TYPE_PAE && PGM_GST_TYPE == PGM_TYPE_32BIT
3873	GCPhysGst \|= (iPDDst & 1) * (PAGE_SIZE / 2);
3874	# endif
3875	}
3876	else
3877	{
3878	# if PGM_GST_TYPE == PGM_TYPE_32BIT
3879	if (PdeSrc.u & X86_PDE4M_PG_HIGH_MASK)
3880	{
3881	AssertMsgFailed(("Guest PDE at %VGv is using PSE36 or similar! PdeSrc=%#RX64\n",
3882	GCPtr, (uint64_t)PdeSrc.u));
3883	cErrors++;
3884	continue;
3885	}
3886	# endif
3887	GCPhysGst = GST_GET_PDE_BIG_PG_GCPHYS(PdeSrc);
3888	# if PGM_SHW_TYPE == PGM_TYPE_PAE && PGM_GST_TYPE == PGM_TYPE_32BIT
3889	GCPhysGst \|= GCPtr & RT_BIT(X86_PAGE_2M_SHIFT);
3890	# endif
3891	}
3892
3893	if ( pPoolPage->enmKind
3894	!= (!PdeSrc.b.u1Size \|\| !fBigPagesSupported ? BTH_PGMPOOLKIND_PT_FOR_PT : BTH_PGMPOOLKIND_PT_FOR_BIG))
3895	{
3896	AssertMsgFailed(("Invalid shadow page table kind %d at %VGv! PdeSrc=%#RX64\n",
3897	pPoolPage->enmKind, GCPtr, (uint64_t)PdeSrc.u));
3898	cErrors++;
3899	}
3900
3901	PPGMPAGE pPhysPage = pgmPhysGetPage(pPGM, GCPhysGst);
3902	if (!pPhysPage)
3903	{
3904	AssertMsgFailed(("Cannot find guest physical address %VGp in the PDE at %VGv! PdeSrc=%#RX64\n",
3905	GCPhysGst, GCPtr, (uint64_t)PdeSrc.u));
3906	cErrors++;
3907	continue;
3908	}
3909
3910	if (GCPhysGst != pPoolPage->GCPhys)
3911	{
3912	AssertMsgFailed(("GCPhysGst=%VGp != pPage->GCPhys=%VGp at %VGv\n",
3913	GCPhysGst, pPoolPage->GCPhys, GCPtr));
3914	cErrors++;
3915	continue;
3916	}
3917
3918	if ( !PdeSrc.b.u1Size
3919	\|\| !fBigPagesSupported)
3920	{
3921	/*
3922	* Page Table.
3923	*/
3924	const GSTPT *pPTSrc;
3925	rc = PGM_GCPHYS_2_PTR(pVM, GCPhysGst & ~(RTGCPHYS)(PAGE_SIZE - 1), &pPTSrc);
3926	if (VBOX_FAILURE(rc))
3927	{
3928	AssertMsgFailed(("Cannot map/convert guest physical address %VGp in the PDE at %VGv! PdeSrc=%#RX64\n",
3929	GCPhysGst, GCPtr, (uint64_t)PdeSrc.u));
3930	cErrors++;
3931	continue;
3932	}
3933	if ( (PdeSrc.u & (X86_PDE_P \| X86_PDE_US \| X86_PDE_RW/* \| X86_PDE_A*/))
3934	!= (PdeDst.u & (X86_PDE_P \| X86_PDE_US \| X86_PDE_RW/* \| X86_PDE_A*/)))
3935	{
3936	/// @todo We get here a lot on out-of-sync CR3 entries. The access handler should zap them to avoid false alarms here!
3937	// (This problem will go away when/if we shadow multiple CR3s.)
3938	AssertMsgFailed(("4K PDE flags mismatch at %VGv! PdeSrc=%#RX64 PdeDst=%#RX64\n",
3939	GCPtr, (uint64_t)PdeSrc.u, (uint64_t)PdeDst.u));
3940	cErrors++;
3941	continue;
3942	}
3943	if (PdeDst.u & PGM_PDFLAGS_TRACK_DIRTY)
3944	{
3945	AssertMsgFailed(("4K PDEs cannot have PGM_PDFLAGS_TRACK_DIRTY set! GCPtr=%VGv PdeDst=%#RX64\n",
3946	GCPtr, (uint64_t)PdeDst.u));
3947	cErrors++;
3948	continue;
3949	}
3950
3951	/* iterate the page table. */
3952	# if PGM_SHW_TYPE == PGM_TYPE_PAE && PGM_GST_TYPE == PGM_TYPE_32BIT
3953	/* Select the right PDE as we're emulating a 4kb page table with 2 shadow page tables. */
3954	const unsigned offPTSrc = ((GCPtr >> SHW_PD_SHIFT) & 1) * 512;
3955	# else
3956	const unsigned offPTSrc = 0;
3957	# endif
3958	for (unsigned iPT = 0, off = 0;
3959	iPT < RT_ELEMENTS(pPTDst->a);
3960	iPT++, off += PAGE_SIZE)
3961	{
3962	const SHWPTE PteDst = pPTDst->a[iPT];
3963
3964	/* skip not-present entries. */
3965	if (!(PteDst.u & (X86_PTE_P \| PGM_PTFLAGS_TRACK_DIRTY))) /** @todo deal with ALL handlers and CSAM !P pages! */
3966	continue;
3967	Assert(PteDst.n.u1Present);
3968
3969	const GSTPTE PteSrc = pPTSrc->a[iPT + offPTSrc];
3970	if (!PteSrc.n.u1Present)
3971	{
3972	# ifdef IN_RING3
3973	PGMAssertHandlerAndFlagsInSync(pVM);
3974	PGMR3DumpHierarchyGC(pVM, cr3, cr4, (PdeSrc.u & GST_PDE_PG_MASK));
3975	# endif
3976	AssertMsgFailed(("Out of sync (!P) PTE at %VGv! PteSrc=%#RX64 PteDst=%#RX64 pPTSrc=%VGv iPTSrc=%x PdeSrc=%x physpte=%VGp\n",
3977	GCPtr + off, (uint64_t)PteSrc.u, (uint64_t)PteDst.u, pPTSrc, iPT + offPTSrc, PdeSrc.au32[0],
3978	(PdeSrc.u & GST_PDE_PG_MASK) + (iPT + offPTSrc)*sizeof(PteSrc)));
3979	cErrors++;
3980	continue;
3981	}
3982
3983	uint64_t fIgnoreFlags = GST_PTE_PG_MASK \| X86_PTE_AVL_MASK \| X86_PTE_G \| X86_PTE_D \| X86_PTE_PWT \| X86_PTE_PCD \| X86_PTE_PAT;
3984	# if 1 /** @todo sync accessed bit properly... */
3985	fIgnoreFlags \|= X86_PTE_A;
3986	# endif
3987
3988	/* match the physical addresses */
3989	HCPhysShw = PteDst.u & SHW_PTE_PG_MASK;
3990	GCPhysGst = PteSrc.u & GST_PTE_PG_MASK;
3991
3992	# ifdef IN_RING3
3993	rc = PGMPhysGCPhys2HCPhys(pVM, GCPhysGst, &HCPhys);
3994	if (VBOX_FAILURE(rc))
3995	{
3996	if (HCPhysShw != MMR3PageDummyHCPhys(pVM))
3997	{
3998	AssertMsgFailed(("Cannot find guest physical address %VGp at %VGv! PteSrc=%#RX64 PteDst=%#RX64\n",
3999	GCPhysGst, GCPtr + off, (uint64_t)PteSrc.u, (uint64_t)PteDst.u));
4000	cErrors++;
4001	continue;
4002	}
4003	}
4004	else if (HCPhysShw != (HCPhys & SHW_PTE_PG_MASK))
4005	{
4006	AssertMsgFailed(("Out of sync (phys) at %VGv! HCPhysShw=%VHp HCPhys=%VHp GCPhysGst=%VGp PteSrc=%#RX64 PteDst=%#RX64\n",
4007	GCPtr + off, HCPhysShw, HCPhys, GCPhysGst, (uint64_t)PteSrc.u, (uint64_t)PteDst.u));
4008	cErrors++;
4009	continue;
4010	}
4011	# endif
4012
4013	pPhysPage = pgmPhysGetPage(pPGM, GCPhysGst);
4014	if (!pPhysPage)
4015	{
4016	# ifdef IN_RING3 /** @todo make MMR3PageDummyHCPhys an 'All' function! */
4017	if (HCPhysShw != MMR3PageDummyHCPhys(pVM))
4018	{
4019	AssertMsgFailed(("Cannot find guest physical address %VGp at %VGv! PteSrc=%#RX64 PteDst=%#RX64\n",
4020	GCPhysGst, GCPtr + off, (uint64_t)PteSrc.u, (uint64_t)PteDst.u));
4021	cErrors++;
4022	continue;
4023	}
4024	# endif
4025	if (PteDst.n.u1Write)
4026	{
4027	AssertMsgFailed(("Invalid guest page at %VGv is writable! GCPhysGst=%VGp PteSrc=%#RX64 PteDst=%#RX64\n",
4028	GCPtr + off, GCPhysGst, (uint64_t)PteSrc.u, (uint64_t)PteDst.u));
4029	cErrors++;
4030	}
4031	fIgnoreFlags \|= X86_PTE_RW;
4032	}
4033	else if (HCPhysShw != (PGM_PAGE_GET_HCPHYS(pPhysPage) & SHW_PTE_PG_MASK))
4034	{
4035	AssertMsgFailed(("Out of sync (phys) at %VGv! HCPhysShw=%VHp HCPhys=%VHp GCPhysGst=%VGp PteSrc=%#RX64 PteDst=%#RX64\n",
4036	GCPtr + off, HCPhysShw, pPhysPage->HCPhys, GCPhysGst, (uint64_t)PteSrc.u, (uint64_t)PteDst.u));
4037	cErrors++;
4038	continue;
4039	}
4040
4041	/* flags */
4042	if (PGM_PAGE_HAS_ACTIVE_HANDLERS(pPhysPage))
4043	{
4044	if (!PGM_PAGE_HAS_ACTIVE_ALL_HANDLERS(pPhysPage))
4045	{
4046	if (PteDst.n.u1Write)
4047	{
4048	AssertMsgFailed(("WRITE access flagged at %VGv but the page is writable! HCPhys=%VGv PteSrc=%#RX64 PteDst=%#RX64\n",
4049	GCPtr + off, pPhysPage->HCPhys, (uint64_t)PteSrc.u, (uint64_t)PteDst.u));
4050	cErrors++;
4051	continue;
4052	}
4053	fIgnoreFlags \|= X86_PTE_RW;
4054	}
4055	else
4056	{
4057	if (PteDst.n.u1Present)
4058	{
4059	AssertMsgFailed(("ALL access flagged at %VGv but the page is present! HCPhys=%VHp PteSrc=%#RX64 PteDst=%#RX64\n",
4060	GCPtr + off, pPhysPage->HCPhys, (uint64_t)PteSrc.u, (uint64_t)PteDst.u));
4061	cErrors++;
4062	continue;
4063	}
4064	fIgnoreFlags \|= X86_PTE_P;
4065	}
4066	}
4067	else
4068	{
4069	if (!PteSrc.n.u1Dirty && PteSrc.n.u1Write)
4070	{
4071	if (PteDst.n.u1Write)
4072	{
4073	AssertMsgFailed(("!DIRTY page at %VGv is writable! PteSrc=%#RX64 PteDst=%#RX64\n",
4074	GCPtr + off, (uint64_t)PteSrc.u, (uint64_t)PteDst.u));
4075	cErrors++;
4076	continue;
4077	}
4078	if (!(PteDst.u & PGM_PTFLAGS_TRACK_DIRTY))
4079	{
4080	AssertMsgFailed(("!DIRTY page at %VGv is not marked TRACK_DIRTY! PteSrc=%#RX64 PteDst=%#RX64\n",
4081	GCPtr + off, (uint64_t)PteSrc.u, (uint64_t)PteDst.u));
4082	cErrors++;
4083	continue;
4084	}
4085	if (PteDst.n.u1Dirty)
4086	{
4087	AssertMsgFailed(("!DIRTY page at %VGv is marked DIRTY! PteSrc=%#RX64 PteDst=%#RX64\n",
4088	GCPtr + off, (uint64_t)PteSrc.u, (uint64_t)PteDst.u));
4089	cErrors++;
4090	}
4091	# if 0 /** @todo sync access bit properly... */
4092	if (PteDst.n.u1Accessed != PteSrc.n.u1Accessed)
4093	{
4094	AssertMsgFailed(("!DIRTY page at %VGv is has mismatching accessed bit! PteSrc=%#RX64 PteDst=%#RX64\n",
4095	GCPtr + off, (uint64_t)PteSrc.u, (uint64_t)PteDst.u));
4096	cErrors++;
4097	}
4098	fIgnoreFlags \|= X86_PTE_RW;
4099	# else
4100	fIgnoreFlags \|= X86_PTE_RW \| X86_PTE_A;
4101	# endif
4102	}
4103	else if (PteDst.u & PGM_PTFLAGS_TRACK_DIRTY)
4104	{
4105	/* access bit emulation (not implemented). */
4106	if (PteSrc.n.u1Accessed \|\| PteDst.n.u1Present)
4107	{
4108	AssertMsgFailed(("PGM_PTFLAGS_TRACK_DIRTY set at %VGv but no accessed bit emulation! PteSrc=%#RX64 PteDst=%#RX64\n",
4109	GCPtr + off, (uint64_t)PteSrc.u, (uint64_t)PteDst.u));
4110	cErrors++;
4111	continue;
4112	}
4113	if (!PteDst.n.u1Accessed)
4114	{
4115	AssertMsgFailed(("!ACCESSED page at %VGv is has the accessed bit set! PteSrc=%#RX64 PteDst=%#RX64\n",
4116	GCPtr + off, (uint64_t)PteSrc.u, (uint64_t)PteDst.u));
4117	cErrors++;
4118	}
4119	fIgnoreFlags \|= X86_PTE_P;
4120	}
4121	# ifdef DEBUG_sandervl
4122	fIgnoreFlags \|= X86_PTE_D \| X86_PTE_A;
4123	# endif
4124	}
4125
4126	if ( (PteSrc.u & ~fIgnoreFlags) != (PteDst.u & ~fIgnoreFlags)
4127	&& (PteSrc.u & ~(fIgnoreFlags \| X86_PTE_RW)) != (PteDst.u & ~fIgnoreFlags)
4128	)
4129	{
4130	AssertMsgFailed(("Flags mismatch at %VGv! %#RX64 != %#RX64 fIgnoreFlags=%#RX64 PteSrc=%#RX64 PteDst=%#RX64\n",
4131	GCPtr + off, (uint64_t)PteSrc.u & ~fIgnoreFlags, (uint64_t)PteDst.u & ~fIgnoreFlags,
4132	fIgnoreFlags, (uint64_t)PteSrc.u, (uint64_t)PteDst.u));
4133	cErrors++;
4134	continue;
4135	}
4136	} /* foreach PTE */
4137	}
4138	else
4139	{
4140	/*
4141	* Big Page.
4142	*/
4143	uint64_t fIgnoreFlags = X86_PDE_AVL_MASK \| GST_PDE_PG_MASK \| X86_PDE4M_G \| X86_PDE4M_D \| X86_PDE4M_PS \| X86_PDE4M_PWT \| X86_PDE4M_PCD;
4144	if (!PdeSrc.b.u1Dirty && PdeSrc.b.u1Write)
4145	{
4146	if (PdeDst.n.u1Write)
4147	{
4148	AssertMsgFailed(("!DIRTY page at %VGv is writable! PdeSrc=%#RX64 PdeDst=%#RX64\n",
4149	GCPtr, (uint64_t)PdeSrc.u, (uint64_t)PdeDst.u));
4150	cErrors++;
4151	continue;
4152	}
4153	if (!(PdeDst.u & PGM_PDFLAGS_TRACK_DIRTY))
4154	{
4155	AssertMsgFailed(("!DIRTY page at %VGv is not marked TRACK_DIRTY! PteSrc=%#RX64 PteDst=%#RX64\n",
4156	GCPtr, (uint64_t)PdeSrc.u, (uint64_t)PdeDst.u));
4157	cErrors++;
4158	continue;
4159	}
4160	# if 0 /** @todo sync access bit properly... */
4161	if (PdeDst.n.u1Accessed != PdeSrc.b.u1Accessed)
4162	{
4163	AssertMsgFailed(("!DIRTY page at %VGv is has mismatching accessed bit! PteSrc=%#RX64 PteDst=%#RX64\n",
4164	GCPtr, (uint64_t)PdeSrc.u, (uint64_t)PdeDst.u));
4165	cErrors++;
4166	}
4167	fIgnoreFlags \|= X86_PTE_RW;
4168	# else
4169	fIgnoreFlags \|= X86_PTE_RW \| X86_PTE_A;
4170	# endif
4171	}
4172	else if (PdeDst.u & PGM_PDFLAGS_TRACK_DIRTY)
4173	{
4174	/* access bit emulation (not implemented). */
4175	if (PdeSrc.b.u1Accessed \|\| PdeDst.n.u1Present)
4176	{
4177	AssertMsgFailed(("PGM_PDFLAGS_TRACK_DIRTY set at %VGv but no accessed bit emulation! PdeSrc=%#RX64 PdeDst=%#RX64\n",
4178	GCPtr, (uint64_t)PdeSrc.u, (uint64_t)PdeDst.u));
4179	cErrors++;
4180	continue;
4181	}
4182	if (!PdeDst.n.u1Accessed)
4183	{
4184	AssertMsgFailed(("!ACCESSED page at %VGv is has the accessed bit set! PdeSrc=%#RX64 PdeDst=%#RX64\n",
4185	GCPtr, (uint64_t)PdeSrc.u, (uint64_t)PdeDst.u));
4186	cErrors++;
4187	}
4188	fIgnoreFlags \|= X86_PTE_P;
4189	}
4190
4191	if ((PdeSrc.u & ~fIgnoreFlags) != (PdeDst.u & ~fIgnoreFlags))
4192	{
4193	AssertMsgFailed(("Flags mismatch (B) at %VGv! %#RX64 != %#RX64 fIgnoreFlags=%#RX64 PdeSrc=%#RX64 PdeDst=%#RX64\n",
4194	GCPtr, (uint64_t)PdeSrc.u & ~fIgnoreFlags, (uint64_t)PdeDst.u & ~fIgnoreFlags,
4195	fIgnoreFlags, (uint64_t)PdeSrc.u, (uint64_t)PdeDst.u));
4196	cErrors++;
4197	}
4198
4199	/* iterate the page table. */
4200	for (unsigned iPT = 0, off = 0;
4201	iPT < RT_ELEMENTS(pPTDst->a);
4202	iPT++, off += PAGE_SIZE, GCPhysGst += PAGE_SIZE)
4203	{
4204	const SHWPTE PteDst = pPTDst->a[iPT];
4205
4206	if (PteDst.u & PGM_PTFLAGS_TRACK_DIRTY)
4207	{
4208	AssertMsgFailed(("The PTE at %VGv emulating a 2/4M page is marked TRACK_DIRTY! PdeSrc=%#RX64 PteDst=%#RX64\n",
4209	GCPtr + off, (uint64_t)PdeSrc.u, (uint64_t)PteDst.u));
4210	cErrors++;
4211	}
4212
4213	/* skip not-present entries. */
4214	if (!PteDst.n.u1Present) /** @todo deal with ALL handlers and CSAM !P pages! */
4215	continue;
4216
4217	fIgnoreFlags = X86_PTE_PAE_PG_MASK \| X86_PTE_AVL_MASK \| X86_PTE_PWT \| X86_PTE_PCD \| X86_PTE_PAT \| X86_PTE_D \| X86_PTE_A \| X86_PTE_G \| X86_PTE_PAE_NX;
4218
4219	/* match the physical addresses */
4220	HCPhysShw = PteDst.u & X86_PTE_PAE_PG_MASK;
4221
4222	# ifdef IN_RING3
4223	rc = PGMPhysGCPhys2HCPhys(pVM, GCPhysGst, &HCPhys);
4224	if (VBOX_FAILURE(rc))
4225	{
4226	if (HCPhysShw != MMR3PageDummyHCPhys(pVM))
4227	{
4228	AssertMsgFailed(("Cannot find guest physical address %VGp at %VGv! PdeSrc=%#RX64 PteDst=%#RX64\n",
4229	GCPhysGst, GCPtr + off, (uint64_t)PdeSrc.u, (uint64_t)PteDst.u));
4230	cErrors++;
4231	}
4232	}
4233	else if (HCPhysShw != (HCPhys & X86_PTE_PAE_PG_MASK))
4234	{
4235	AssertMsgFailed(("Out of sync (phys) at %VGv! HCPhysShw=%VHp HCPhys=%VHp GCPhysGst=%VGp PdeSrc=%#RX64 PteDst=%#RX64\n",
4236	GCPtr + off, HCPhysShw, HCPhys, GCPhysGst, (uint64_t)PdeSrc.u, (uint64_t)PteDst.u));
4237	cErrors++;
4238	continue;
4239	}
4240	# endif
4241	pPhysPage = pgmPhysGetPage(pPGM, GCPhysGst);
4242	if (!pPhysPage)
4243	{
4244	# ifdef IN_RING3 /** @todo make MMR3PageDummyHCPhys an 'All' function! */
4245	if (HCPhysShw != MMR3PageDummyHCPhys(pVM))
4246	{
4247	AssertMsgFailed(("Cannot find guest physical address %VGp at %VGv! PdeSrc=%#RX64 PteDst=%#RX64\n",
4248	GCPhysGst, GCPtr + off, (uint64_t)PdeSrc.u, (uint64_t)PteDst.u));
4249	cErrors++;
4250	continue;
4251	}
4252	# endif
4253	if (PteDst.n.u1Write)
4254	{
4255	AssertMsgFailed(("Invalid guest page at %VGv is writable! GCPhysGst=%VGp PdeSrc=%#RX64 PteDst=%#RX64\n",
4256	GCPtr + off, GCPhysGst, (uint64_t)PdeSrc.u, (uint64_t)PteDst.u));
4257	cErrors++;
4258	}
4259	fIgnoreFlags \|= X86_PTE_RW;
4260	}
4261	else if (HCPhysShw != (pPhysPage->HCPhys & X86_PTE_PAE_PG_MASK))
4262	{
4263	AssertMsgFailed(("Out of sync (phys) at %VGv! HCPhysShw=%VHp HCPhys=%VHp GCPhysGst=%VGp PdeSrc=%#RX64 PteDst=%#RX64\n",
4264	GCPtr + off, HCPhysShw, pPhysPage->HCPhys, GCPhysGst, (uint64_t)PdeSrc.u, (uint64_t)PteDst.u));
4265	cErrors++;
4266	continue;
4267	}
4268
4269	/* flags */
4270	if (PGM_PAGE_HAS_ACTIVE_HANDLERS(pPhysPage))
4271	{
4272	if (!PGM_PAGE_HAS_ACTIVE_ALL_HANDLERS(pPhysPage))
4273	{
4274	if (PGM_PAGE_GET_HNDL_PHYS_STATE(pPhysPage) != PGM_PAGE_HNDL_PHYS_STATE_DISABLED)
4275	{
4276	if (PteDst.n.u1Write)
4277	{
4278	AssertMsgFailed(("WRITE access flagged at %VGv but the page is writable! HCPhys=%VGv PdeSrc=%#RX64 PteDst=%#RX64\n",
4279	GCPtr + off, pPhysPage->HCPhys, (uint64_t)PdeSrc.u, (uint64_t)PteDst.u));
4280	cErrors++;
4281	continue;
4282	}
4283	fIgnoreFlags \|= X86_PTE_RW;
4284	}
4285	}
4286	else
4287	{
4288	if (PteDst.n.u1Present)
4289	{
4290	AssertMsgFailed(("ALL access flagged at %VGv but the page is present! HCPhys=%VGv PdeSrc=%#RX64 PteDst=%#RX64\n",
4291	GCPtr + off, pPhysPage->HCPhys, (uint64_t)PdeSrc.u, (uint64_t)PteDst.u));
4292	cErrors++;
4293	continue;
4294	}
4295	fIgnoreFlags \|= X86_PTE_P;
4296	}
4297	}
4298
4299	if ( (PdeSrc.u & ~fIgnoreFlags) != (PteDst.u & ~fIgnoreFlags)
4300	&& (PdeSrc.u & ~(fIgnoreFlags \| X86_PTE_RW)) != (PteDst.u & ~fIgnoreFlags) /* lazy phys handler dereg. */
4301	)
4302	{
4303	AssertMsgFailed(("Flags mismatch (BT) at %VGv! %#RX64 != %#RX64 fIgnoreFlags=%#RX64 PdeSrc=%#RX64 PteDst=%#RX64\n",
4304	GCPtr + off, (uint64_t)PdeSrc.u & ~fIgnoreFlags, (uint64_t)PteDst.u & ~fIgnoreFlags,
4305	fIgnoreFlags, (uint64_t)PdeSrc.u, (uint64_t)PteDst.u));
4306	cErrors++;
4307	continue;
4308	}
4309	} /* for each PTE */
4310	}
4311	}
4312	/* not present */
4313
4314	} /* for each PDE */
4315
4316	} /* for each PDPTE */
4317
4318	} /* for each PML4E */
4319
4320	# ifdef DEBUG
4321	if (cErrors)
4322	LogFlow(("AssertCR3: cErrors=%d\n", cErrors));
4323	# endif
4324
4325	#endif
4326	return cErrors;
4327
4328	#endif /* PGM_SHW_TYPE != PGM_TYPE_NESTED && PGM_SHW_TYPE != PGM_TYPE_EPT */
4329	}
4330	#endif /* VBOX_STRICT */
4331

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source: vbox/trunk/src/VBox/VMM/VMMAll/PGMAllBth.h@ 12997

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