PGMAllBth.h@ 71290

Last change on this file since 71290 was 70977, checked in by vboxsync, 7 years ago
NEM: Working on PGM notifications. bugref:9044
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File size: 213.9 KB

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1	/* $Id: PGMAllBth.h 70977 2018-02-12 20:45:31Z vboxsync $ */
2	/** @file
3	* VBox - Page Manager, Shadow+Guest Paging Template - All context code.
4	*
5	* @remarks The nested page tables on AMD makes use of PGM_SHW_TYPE in
6	* {PGM_TYPE_AMD64, PGM_TYPE_PAE and PGM_TYPE_32BIT} and PGM_GST_TYPE
7	* set to PGM_TYPE_PROT. Half of the code in this file is not
8	* exercised with PGM_SHW_TYPE set to PGM_TYPE_NESTED.
9	*
10	* @remarks Extended page tables (intel) are built with PGM_GST_TYPE set to
11	* PGM_TYPE_PROT (and PGM_SHW_TYPE set to PGM_TYPE_EPT).
12	*
13	* @remarks This file is one big \#ifdef-orgy!
14	*
15	*/
16
17	/*
18	* Copyright (C) 2006-2017 Oracle Corporation
19	*
20	* This file is part of VirtualBox Open Source Edition (OSE), as
21	* available from http://www.virtualbox.org. This file is free software;
22	* you can redistribute it and/or modify it under the terms of the GNU
23	* General Public License (GPL) as published by the Free Software
24	* Foundation, in version 2 as it comes in the "COPYING" file of the
25	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
26	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
27	*/
28
29	#ifdef _MSC_VER
30	/** @todo we're generating unnecessary code in nested/ept shadow mode and for
31	* real/prot-guest+RC mode. */
32	# pragma warning(disable: 4505)
33	#endif
34
35	/*******************************************************************************
36	* Internal Functions *
37	*******************************************************************************/
38	RT_C_DECLS_BEGIN
39	PGM_BTH_DECL(int, Trap0eHandler)(PVMCPU pVCpu, RTGCUINT uErr, PCPUMCTXCORE pRegFrame, RTGCPTR pvFault, bool *pfLockTaken);
40	PGM_BTH_DECL(int, InvalidatePage)(PVMCPU pVCpu, RTGCPTR GCPtrPage);
41	static int PGM_BTH_NAME(SyncPage)(PVMCPU pVCpu, GSTPDE PdeSrc, RTGCPTR GCPtrPage, unsigned cPages, unsigned uErr);
42	static int PGM_BTH_NAME(CheckDirtyPageFault)(PVMCPU pVCpu, uint32_t uErr, PSHWPDE pPdeDst, GSTPDE const *pPdeSrc, RTGCPTR GCPtrPage);
43	static int PGM_BTH_NAME(SyncPT)(PVMCPU pVCpu, unsigned iPD, PGSTPD pPDSrc, RTGCPTR GCPtrPage);
44	# if PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE)
45	static void PGM_BTH_NAME(SyncPageWorker)(PVMCPU pVCpu, PSHWPTE pPteDst, GSTPDE PdeSrc, GSTPTE PteSrc, PPGMPOOLPAGE pShwPage, unsigned iPTDst);
46	# else
47	static void PGM_BTH_NAME(SyncPageWorker)(PVMCPU pVCpu, PSHWPTE pPteDst, RTGCPHYS GCPhysPage, PPGMPOOLPAGE pShwPage, unsigned iPTDst);
48	#endif
49	PGM_BTH_DECL(int, VerifyAccessSyncPage)(PVMCPU pVCpu, RTGCPTR Addr, unsigned fPage, unsigned uErr);
50	PGM_BTH_DECL(int, PrefetchPage)(PVMCPU pVCpu, RTGCPTR GCPtrPage);
51	PGM_BTH_DECL(int, SyncCR3)(PVMCPU pVCpu, uint64_t cr0, uint64_t cr3, uint64_t cr4, bool fGlobal);
52	#ifdef VBOX_STRICT
53	PGM_BTH_DECL(unsigned, AssertCR3)(PVMCPU pVCpu, uint64_t cr3, uint64_t cr4, RTGCPTR GCPtr = 0, RTGCPTR cb = ~(RTGCPTR)0);
54	#endif
55	PGM_BTH_DECL(int, MapCR3)(PVMCPU pVCpu, RTGCPHYS GCPhysCR3);
56	PGM_BTH_DECL(int, UnmapCR3)(PVMCPU pVCpu);
57	RT_C_DECLS_END
58
59
60	/*
61	* Filter out some illegal combinations of guest and shadow paging, so we can
62	* remove redundant checks inside functions.
63	*/
64	#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
65	# error "Invalid combination; PAE guest implies PAE shadow"
66	#endif
67
68	#if (PGM_GST_TYPE == PGM_TYPE_REAL \|\| PGM_GST_TYPE == PGM_TYPE_PROT) \
69	&& !(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)
70	# error "Invalid combination; real or protected mode without paging implies 32 bits or PAE shadow paging."
71	#endif
72
73	#if (PGM_GST_TYPE == PGM_TYPE_32BIT \|\| PGM_GST_TYPE == PGM_TYPE_PAE) \
74	&& !(PGM_SHW_TYPE == PGM_TYPE_32BIT \|\| PGM_SHW_TYPE == PGM_TYPE_PAE \|\| PGM_SHW_TYPE == PGM_TYPE_NESTED \|\| PGM_SHW_TYPE == PGM_TYPE_EPT)
75	# error "Invalid combination; 32 bits guest paging or PAE implies 32 bits or PAE shadow paging."
76	#endif
77
78	#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) \
79	\|\| (PGM_SHW_TYPE == PGM_TYPE_AMD64 && PGM_GST_TYPE != PGM_TYPE_AMD64 && PGM_GST_TYPE != PGM_TYPE_PROT)
80	# error "Invalid combination; AMD64 guest implies AMD64 shadow and vice versa"
81	#endif
82
83	#ifndef IN_RING3
84
85	# if PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE)
86	/**
87	* Deal with a guest page fault.
88	*
89	* @returns Strict VBox status code.
90	* @retval VINF_EM_RAW_GUEST_TRAP
91	* @retval VINF_EM_RAW_EMULATE_INSTR
92	*
93	* @param pVCpu The cross context virtual CPU structure of the calling EMT.
94	* @param pGstWalk The guest page table walk result.
95	* @param uErr The error code.
96	*/
97	PGM_BTH_DECL(VBOXSTRICTRC, Trap0eHandlerGuestFault)(PVMCPU pVCpu, PGSTPTWALK pGstWalk, RTGCUINT uErr)
98	{
99	# if !defined(PGM_WITHOUT_MAPPINGS) && (PGM_GST_TYPE == PGM_TYPE_32BIT \|\| PGM_GST_TYPE == PGM_TYPE_PAE)
100	/*
101	* Check for write conflicts with our hypervisor mapping.
102	*
103	* If the guest happens to access a non-present page, where our hypervisor
104	* is currently mapped, then we'll create a #PF storm in the guest.
105	*/
106	if ( (uErr & (X86_TRAP_PF_P \| X86_TRAP_PF_RW)) == (X86_TRAP_PF_P \| X86_TRAP_PF_RW)
107	&& pgmMapAreMappingsEnabled(pVCpu->CTX_SUFF(pVM))
108	&& MMHyperIsInsideArea(pVCpu->CTX_SUFF(pVM), pGstWalk->Core.GCPtr))
109	{
110	/* Force a CR3 sync to check for conflicts and emulate the instruction. */
111	VMCPU_FF_SET(pVCpu, VMCPU_FF_PGM_SYNC_CR3);
112	STAM_STATS({ pVCpu->pgm.s.CTX_SUFF(pStatTrap0eAttribution) = &pVCpu->pgm.s.CTX_SUFF(pStats)->StatRZTrap0eTime2GuestTrap; });
113	return VINF_EM_RAW_EMULATE_INSTR;
114	}
115	# endif
116
117	/*
118	* Calc the error code for the guest trap.
119	*/
120	uint32_t uNewErr = GST_IS_NX_ACTIVE(pVCpu)
121	? uErr & (X86_TRAP_PF_RW \| X86_TRAP_PF_US \| X86_TRAP_PF_ID)
122	: uErr & (X86_TRAP_PF_RW \| X86_TRAP_PF_US);
123	if ( pGstWalk->Core.fRsvdError
124	\|\| pGstWalk->Core.fBadPhysAddr)
125	{
126	uNewErr \|= X86_TRAP_PF_RSVD \| X86_TRAP_PF_P;
127	Assert(!pGstWalk->Core.fNotPresent);
128	}
129	else if (!pGstWalk->Core.fNotPresent)
130	uNewErr \|= X86_TRAP_PF_P;
131	TRPMSetErrorCode(pVCpu, uNewErr);
132
133	LogFlow(("Guest trap; cr2=%RGv uErr=%RGv lvl=%d\n", pGstWalk->Core.GCPtr, uErr, pGstWalk->Core.uLevel));
134	STAM_STATS({ pVCpu->pgm.s.CTX_SUFF(pStatTrap0eAttribution) = &pVCpu->pgm.s.CTX_SUFF(pStats)->StatRZTrap0eTime2GuestTrap; });
135	return VINF_EM_RAW_GUEST_TRAP;
136	}
137	# endif /* PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE) */
138
139
140	/**
141	* Deal with a guest page fault.
142	*
143	* The caller has taken the PGM lock.
144	*
145	* @returns Strict VBox status code.
146	*
147	* @param pVCpu The cross context virtual CPU structure of the calling EMT.
148	* @param uErr The error code.
149	* @param pRegFrame The register frame.
150	* @param pvFault The fault address.
151	* @param pPage The guest page at @a pvFault.
152	* @param pGstWalk The guest page table walk result.
153	* @param pfLockTaken PGM lock taken here or not (out). This is true
154	* when we're called.
155	*/
156	static VBOXSTRICTRC PGM_BTH_NAME(Trap0eHandlerDoAccessHandlers)(PVMCPU pVCpu, RTGCUINT uErr, PCPUMCTXCORE pRegFrame,
157	RTGCPTR pvFault, PPGMPAGE pPage, bool *pfLockTaken
158	# if PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE) \|\| defined(DOXYGEN_RUNNING)
159	, PGSTPTWALK pGstWalk
160	# endif
161	)
162	{
163	# if !PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE)
164	GSTPDE const PdeSrcDummy = { X86_PDE_P \| X86_PDE_US \| X86_PDE_RW \| X86_PDE_A };
165	# endif
166	PVM pVM = pVCpu->CTX_SUFF(pVM);
167	VBOXSTRICTRC rcStrict;
168
169	if (PGM_PAGE_HAS_ANY_PHYSICAL_HANDLERS(pPage))
170	{
171	/*
172	* Physical page access handler.
173	*/
174	# if PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE)
175	const RTGCPHYS GCPhysFault = pGstWalk->Core.GCPhys;
176	# else
177	const RTGCPHYS GCPhysFault = PGM_A20_APPLY(pVCpu, (RTGCPHYS)pvFault);
178	# endif
179	PPGMPHYSHANDLER pCur = pgmHandlerPhysicalLookup(pVM, GCPhysFault);
180	if (pCur)
181	{
182	PPGMPHYSHANDLERTYPEINT pCurType = PGMPHYSHANDLER_GET_TYPE(pVM, pCur);
183
184	# ifdef PGM_SYNC_N_PAGES
185	/*
186	* If the region is write protected and we got a page not present fault, then sync
187	* the pages. If the fault was caused by a read, then restart the instruction.
188	* In case of write access continue to the GC write handler.
189	*
190	* ASSUMES that there is only one handler per page or that they have similar write properties.
191	*/
192	if ( !(uErr & X86_TRAP_PF_P)
193	&& pCurType->enmKind == PGMPHYSHANDLERKIND_WRITE)
194	{
195	# if PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE)
196	rcStrict = PGM_BTH_NAME(SyncPage)(pVCpu, pGstWalk->Pde, pvFault, PGM_SYNC_NR_PAGES, uErr);
197	# else
198	rcStrict = PGM_BTH_NAME(SyncPage)(pVCpu, PdeSrcDummy, pvFault, PGM_SYNC_NR_PAGES, uErr);
199	# endif
200	if ( RT_FAILURE(rcStrict)
201	\|\| !(uErr & X86_TRAP_PF_RW)
202	\|\| rcStrict == VINF_PGM_SYNCPAGE_MODIFIED_PDE)
203	{
204	AssertMsgRC(rcStrict, ("%Rrc\n", VBOXSTRICTRC_VAL(rcStrict)));
205	STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->StatRZTrap0eHandlersOutOfSync);
206	STAM_STATS({ pVCpu->pgm.s.CTX_SUFF(pStatTrap0eAttribution) = &pVCpu->pgm.s.CTX_SUFF(pStats)->StatRZTrap0eTime2OutOfSyncHndPhys; });
207	return rcStrict;
208	}
209	}
210	# endif
211	# ifdef PGM_WITH_MMIO_OPTIMIZATIONS
212	/*
213	* If the access was not thru a #PF(RSVD\|...) resync the page.
214	*/
215	if ( !(uErr & X86_TRAP_PF_RSVD)
216	&& pCurType->enmKind != PGMPHYSHANDLERKIND_WRITE
217	# if PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE)
218	&& pGstWalk->Core.fEffectiveRW
219	&& !pGstWalk->Core.fEffectiveUS /** @todo Remove pGstWalk->Core.fEffectiveUS and X86_PTE_US further down in the sync code. */
220	# endif
221	)
222	{
223	# if PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE)
224	rcStrict = PGM_BTH_NAME(SyncPage)(pVCpu, pGstWalk->Pde, pvFault, PGM_SYNC_NR_PAGES, uErr);
225	# else
226	rcStrict = PGM_BTH_NAME(SyncPage)(pVCpu, PdeSrcDummy, pvFault, PGM_SYNC_NR_PAGES, uErr);
227	# endif
228	if ( RT_FAILURE(rcStrict)
229	\|\| rcStrict == VINF_PGM_SYNCPAGE_MODIFIED_PDE)
230	{
231	AssertMsgRC(rcStrict, ("%Rrc\n", VBOXSTRICTRC_VAL(rcStrict)));
232	STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->StatRZTrap0eHandlersOutOfSync);
233	STAM_STATS({ pVCpu->pgm.s.CTX_SUFF(pStatTrap0eAttribution) = &pVCpu->pgm.s.CTX_SUFF(pStats)->StatRZTrap0eTime2OutOfSyncHndPhys; });
234	return rcStrict;
235	}
236	}
237	# endif
238
239	AssertMsg( pCurType->enmKind != PGMPHYSHANDLERKIND_WRITE
240	\|\| (pCurType->enmKind == PGMPHYSHANDLERKIND_WRITE && (uErr & X86_TRAP_PF_RW)),
241	("Unexpected trap for physical handler: %08X (phys=%08x) pPage=%R[pgmpage] uErr=%X, enmKind=%d\n",
242	pvFault, GCPhysFault, pPage, uErr, pCurType->enmKind));
243	if (pCurType->enmKind == PGMPHYSHANDLERKIND_WRITE)
244	STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->StatRZTrap0eHandlersPhysWrite);
245	else
246	{
247	STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->StatRZTrap0eHandlersPhysAll);
248	if (uErr & X86_TRAP_PF_RSVD) STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->StatRZTrap0eHandlersPhysAllOpt);
249	}
250
251	if (pCurType->CTX_SUFF(pfnPfHandler))
252	{
253	PPGMPOOL pPool = pVM->pgm.s.CTX_SUFF(pPool);
254	void *pvUser = pCur->CTX_SUFF(pvUser);
255
256	STAM_PROFILE_START(&pCur->Stat, h);
257	if (pCur->hType != pPool->hAccessHandlerType)
258	{
259	pgmUnlock(pVM);
260	*pfLockTaken = false;
261	}
262
263	rcStrict = pCurType->CTX_SUFF(pfnPfHandler)(pVM, pVCpu, uErr, pRegFrame, pvFault, GCPhysFault, pvUser);
264
265	# ifdef VBOX_WITH_STATISTICS
266	pgmLock(pVM);
267	pCur = pgmHandlerPhysicalLookup(pVM, GCPhysFault);
268	if (pCur)
269	STAM_PROFILE_STOP(&pCur->Stat, h);
270	pgmUnlock(pVM);
271	# endif
272	}
273	else
274	rcStrict = VINF_EM_RAW_EMULATE_INSTR;
275
276	STAM_STATS({ pVCpu->pgm.s.CTX_SUFF(pStatTrap0eAttribution) = &pVCpu->pgm.s.CTX_SUFF(pStats)->StatRZTrap0eTime2HndPhys; });
277	return rcStrict;
278	}
279	}
280	# if PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE) && !defined(IN_RING0)
281	else
282	{
283	# ifdef PGM_SYNC_N_PAGES
284	/*
285	* If the region is write protected and we got a page not present fault, then sync
286	* the pages. If the fault was caused by a read, then restart the instruction.
287	* In case of write access continue to the GC write handler.
288	*/
289	if ( PGM_PAGE_GET_HNDL_VIRT_STATE(pPage) < PGM_PAGE_HNDL_PHYS_STATE_ALL
290	&& !(uErr & X86_TRAP_PF_P))
291	{
292	rcStrict = PGM_BTH_NAME(SyncPage)(pVCpu, pGstWalk->Pde, pvFault, PGM_SYNC_NR_PAGES, uErr);
293	if ( RT_FAILURE(rcStrict)
294	\|\| rcStrict == VINF_PGM_SYNCPAGE_MODIFIED_PDE
295	\|\| !(uErr & X86_TRAP_PF_RW))
296	{
297	AssertRC(rcStrict);
298	STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->StatRZTrap0eHandlersOutOfSync);
299	STAM_STATS({ pVCpu->pgm.s.CTX_SUFF(pStatTrap0eAttribution) = &pVCpu->pgm.s.CTX_SUFF(pStats)->StatRZTrap0eTime2OutOfSyncHndVirt; });
300	return rcStrict;
301	}
302	}
303	# endif
304	/*
305	* Ok, it's an virtual page access handler.
306	*
307	* Since it's faster to search by address, we'll do that first
308	* and then retry by GCPhys if that fails.
309	*/
310	/** @todo r=bird: perhaps we should consider looking up by physical address directly now?
311	* r=svl: true, but lookup on virtual address should remain as a fallback as phys & virt trees might be
312	* out of sync, because the page was changed without us noticing it (not-present -> present
313	* without invlpg or mov cr3, xxx).
314	*/
315	PPGMVIRTHANDLER pCur = (PPGMVIRTHANDLER)RTAvlroGCPtrRangeGet(&pVM->pgm.s.CTX_SUFF(pTrees)->VirtHandlers, pvFault);
316	if (pCur)
317	{
318	PPGMVIRTHANDLERTYPEINT pCurType = PGMVIRTANDLER_GET_TYPE(pVM, pCur);
319	AssertMsg(!(pvFault - pCur->Core.Key < pCur->cb)
320	\|\| ( pCurType->enmKind != PGMVIRTHANDLERKIND_WRITE
321	\|\| !(uErr & X86_TRAP_PF_P)
322	\|\| (pCurType->enmKind == PGMVIRTHANDLERKIND_WRITE && (uErr & X86_TRAP_PF_RW))),
323	("Unexpected trap for virtual handler: %RGv (phys=%RGp) pPage=%R[pgmpage] uErr=%X, enumKind=%d\n",
324	pvFault, pGstWalk->Core.GCPhys, pPage, uErr, pCurType->enmKind));
325
326	if ( pvFault - pCur->Core.Key < pCur->cb
327	&& ( uErr & X86_TRAP_PF_RW
328	\|\| pCurType->enmKind != PGMVIRTHANDLERKIND_WRITE ) )
329	{
330	# ifdef IN_RC
331	STAM_PROFILE_START(&pCur->Stat, h);
332	RTGCPTR GCPtrStart = pCur->Core.Key;
333	void *pvUser = pCur->CTX_SUFF(pvUser);
334	pgmUnlock(pVM);
335	*pfLockTaken = false;
336
337	rcStrict = pCurType->CTX_SUFF(pfnPfHandler)(pVM, pVCpu, uErr, pRegFrame, pvFault, GCPtrStart,
338	pvFault - GCPtrStart, pvUser);
339
340	# ifdef VBOX_WITH_STATISTICS
341	pgmLock(pVM);
342	pCur = (PPGMVIRTHANDLER)RTAvlroGCPtrRangeGet(&pVM->pgm.s.CTX_SUFF(pTrees)->VirtHandlers, pvFault);
343	if (pCur)
344	STAM_PROFILE_STOP(&pCur->Stat, h);
345	pgmUnlock(pVM);
346	# endif
347	# else
348	rcStrict = VINF_EM_RAW_EMULATE_INSTR; /** @todo for VMX */
349	# endif
350	STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->StatRZTrap0eHandlersVirtual);
351	STAM_STATS({ pVCpu->pgm.s.CTX_SUFF(pStatTrap0eAttribution) = &pVCpu->pgm.s.CTX_SUFF(pStats)->StatRZTrap0eTime2HndVirt; });
352	return rcStrict;
353	}
354	/* Unhandled part of a monitored page */
355	Log(("Unhandled part of monitored page %RGv\n", pvFault));
356	}
357	else
358	{
359	/* Check by physical address. */
360	unsigned iPage;
361	pCur = pgmHandlerVirtualFindByPhysAddr(pVM, pGstWalk->Core.GCPhys, &iPage);
362	if (pCur)
363	{
364	PPGMVIRTHANDLERTYPEINT pCurType = PGMVIRTANDLER_GET_TYPE(pVM, pCur);
365	if ( uErr & X86_TRAP_PF_RW
366	\|\| pCurType->enmKind != PGMVIRTHANDLERKIND_WRITE )
367	{
368	Assert( (pCur->aPhysToVirt[iPage].Core.Key & X86_PTE_PAE_PG_MASK)
369	== (pGstWalk->Core.GCPhys & X86_PTE_PAE_PG_MASK));
370	# ifdef IN_RC
371	STAM_PROFILE_START(&pCur->Stat, h);
372	RTGCPTR GCPtrStart = pCur->Core.Key;
373	void *pvUser = pCur->CTX_SUFF(pvUser);
374	pgmUnlock(pVM);
375	*pfLockTaken = false;
376
377	RTGCPTR off = (iPage << PAGE_SHIFT)
378	+ (pvFault & PAGE_OFFSET_MASK)
379	- (GCPtrStart & PAGE_OFFSET_MASK);
380	Assert(off < pCur->cb);
381	rcStrict = pCurType->CTX_SUFF(pfnPfHandler)(pVM, pVCpu, uErr, pRegFrame, pvFault, GCPtrStart, off, pvUser);
382
383	# ifdef VBOX_WITH_STATISTICS
384	pgmLock(pVM);
385	pCur = (PPGMVIRTHANDLER)RTAvlroGCPtrRangeGet(&pVM->pgm.s.CTX_SUFF(pTrees)->VirtHandlers, GCPtrStart);
386	if (pCur)
387	STAM_PROFILE_STOP(&pCur->Stat, h);
388	pgmUnlock(pVM);
389	# endif
390	# else
391	rcStrict = VINF_EM_RAW_EMULATE_INSTR; /** @todo for VMX */
392	# endif
393	STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->StatRZTrap0eHandlersVirtualByPhys);
394	STAM_STATS({ pVCpu->pgm.s.CTX_SUFF(pStatTrap0eAttribution) = &pVCpu->pgm.s.CTX_SUFF(pStats)->StatRZTrap0eTime2HndVirt; });
395	return rcStrict;
396	}
397	}
398	}
399	}
400	# endif /* PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE) */
401
402	/*
403	* There is a handled area of the page, but this fault doesn't belong to it.
404	* We must emulate the instruction.
405	*
406	* To avoid crashing (non-fatal) in the interpreter and go back to the recompiler
407	* we first check if this was a page-not-present fault for a page with only
408	* write access handlers. Restart the instruction if it wasn't a write access.
409	*/
410	STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->StatRZTrap0eHandlersUnhandled);
411
412	if ( !PGM_PAGE_HAS_ACTIVE_ALL_HANDLERS(pPage)
413	&& !(uErr & X86_TRAP_PF_P))
414	{
415	# if PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE)
416	rcStrict = PGM_BTH_NAME(SyncPage)(pVCpu, pGstWalk->Pde, pvFault, PGM_SYNC_NR_PAGES, uErr);
417	# else
418	rcStrict = PGM_BTH_NAME(SyncPage)(pVCpu, PdeSrcDummy, pvFault, PGM_SYNC_NR_PAGES, uErr);
419	# endif
420	if ( RT_FAILURE(rcStrict)
421	\|\| rcStrict == VINF_PGM_SYNCPAGE_MODIFIED_PDE
422	\|\| !(uErr & X86_TRAP_PF_RW))
423	{
424	AssertMsgRC(rcStrict, ("%Rrc\n", VBOXSTRICTRC_VAL(rcStrict)));
425	STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->StatRZTrap0eHandlersOutOfSync);
426	STAM_STATS({ pVCpu->pgm.s.CTX_SUFF(pStatTrap0eAttribution) = &pVCpu->pgm.s.CTX_SUFF(pStats)->StatRZTrap0eTime2OutOfSyncHndPhys; });
427	return rcStrict;
428	}
429	}
430
431	/** @todo This particular case can cause quite a lot of overhead. E.g. early stage of kernel booting in Ubuntu 6.06
432	* It's writing to an unhandled part of the LDT page several million times.
433	*/
434	rcStrict = PGMInterpretInstruction(pVM, pVCpu, pRegFrame, pvFault);
435	LogFlow(("PGM: PGMInterpretInstruction -> rcStrict=%d pPage=%R[pgmpage]\n", VBOXSTRICTRC_VAL(rcStrict), pPage));
436	STAM_STATS({ pVCpu->pgm.s.CTX_SUFF(pStatTrap0eAttribution) = &pVCpu->pgm.s.CTX_SUFF(pStats)->StatRZTrap0eTime2HndUnhandled; });
437	return rcStrict;
438	} /* if any kind of handler */
439
440
441	/**
442	* \#PF Handler for raw-mode guest execution.
443	*
444	* @returns VBox status code (appropriate for trap handling and GC return).
445	*
446	* @param pVCpu The cross context virtual CPU structure.
447	* @param uErr The trap error code.
448	* @param pRegFrame Trap register frame.
449	* @param pvFault The fault address.
450	* @param pfLockTaken PGM lock taken here or not (out)
451	*/
452	PGM_BTH_DECL(int, Trap0eHandler)(PVMCPU pVCpu, RTGCUINT uErr, PCPUMCTXCORE pRegFrame, RTGCPTR pvFault, bool *pfLockTaken)
453	{
454	PVM pVM = pVCpu->CTX_SUFF(pVM); NOREF(pVM);
455
456	*pfLockTaken = false;
457
458	# if ( PGM_GST_TYPE == PGM_TYPE_32BIT \|\| PGM_GST_TYPE == PGM_TYPE_REAL \|\| PGM_GST_TYPE == PGM_TYPE_PROT \
459	\|\| PGM_GST_TYPE == PGM_TYPE_PAE \|\| PGM_GST_TYPE == PGM_TYPE_AMD64) \
460	&& PGM_SHW_TYPE != PGM_TYPE_NESTED \
461	&& (PGM_SHW_TYPE != PGM_TYPE_EPT \|\| PGM_GST_TYPE == PGM_TYPE_PROT)
462	int rc;
463
464	# if PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE)
465	/*
466	* Walk the guest page translation tables and check if it's a guest fault.
467	*/
468	GSTPTWALK GstWalk;
469	rc = PGM_GST_NAME(Walk)(pVCpu, pvFault, &GstWalk);
470	if (RT_FAILURE_NP(rc))
471	return VBOXSTRICTRC_TODO(PGM_BTH_NAME(Trap0eHandlerGuestFault)(pVCpu, &GstWalk, uErr));
472
473	/* assert some GstWalk sanity. */
474	# if PGM_GST_TYPE == PGM_TYPE_AMD64
475	/AssertMsg(GstWalk.Pml4e.u == GstWalk.pPml4e->u, ("%RX64 %RX64\n", (uint64_t)GstWalk.Pml4e.u, (uint64_t)GstWalk.pPml4e->u)); - not always true with SMP guests. /
476	# endif
477	# if PGM_GST_TYPE == PGM_TYPE_AMD64 \|\| PGM_GST_TYPE == PGM_TYPE_PAE
478	/AssertMsg(GstWalk.Pdpe.u == GstWalk.pPdpe->u, ("%RX64 %RX64\n", (uint64_t)GstWalk.Pdpe.u, (uint64_t)GstWalk.pPdpe->u)); - ditto /
479	# endif
480	/AssertMsg(GstWalk.Pde.u == GstWalk.pPde->u, ("%RX64 %RX64\n", (uint64_t)GstWalk.Pde.u, (uint64_t)GstWalk.pPde->u)); - ditto /
481	/AssertMsg(GstWalk.Core.fBigPage \|\| GstWalk.Pte.u == GstWalk.pPte->u, ("%RX64 %RX64\n", (uint64_t)GstWalk.Pte.u, (uint64_t)GstWalk.pPte->u)); - ditto /
482	Assert(GstWalk.Core.fSucceeded);
483
484	if (uErr & (X86_TRAP_PF_RW \| X86_TRAP_PF_US \| X86_TRAP_PF_ID))
485	{
486	if ( ( (uErr & X86_TRAP_PF_RW)
487	&& !GstWalk.Core.fEffectiveRW
488	&& ( (uErr & X86_TRAP_PF_US)
489	\|\| CPUMIsGuestR0WriteProtEnabled(pVCpu)) )
490	\|\| ((uErr & X86_TRAP_PF_US) && !GstWalk.Core.fEffectiveUS)
491	\|\| ((uErr & X86_TRAP_PF_ID) && GstWalk.Core.fEffectiveNX)
492	)
493	return VBOXSTRICTRC_TODO(PGM_BTH_NAME(Trap0eHandlerGuestFault)(pVCpu, &GstWalk, uErr));
494	}
495
496	/*
497	* Set the accessed and dirty flags.
498	*/
499	# if PGM_GST_TYPE == PGM_TYPE_AMD64
500	GstWalk.Pml4e.u \|= X86_PML4E_A;
501	GstWalk.pPml4e->u \|= X86_PML4E_A;
502	GstWalk.Pdpe.u \|= X86_PDPE_A;
503	GstWalk.pPdpe->u \|= X86_PDPE_A;
504	# endif
505	if (GstWalk.Core.fBigPage)
506	{
507	Assert(GstWalk.Pde.b.u1Size);
508	if (uErr & X86_TRAP_PF_RW)
509	{
510	GstWalk.Pde.u \|= X86_PDE4M_A \| X86_PDE4M_D;
511	GstWalk.pPde->u \|= X86_PDE4M_A \| X86_PDE4M_D;
512	}
513	else
514	{
515	GstWalk.Pde.u \|= X86_PDE4M_A;
516	GstWalk.pPde->u \|= X86_PDE4M_A;
517	}
518	}
519	else
520	{
521	Assert(!GstWalk.Pde.b.u1Size);
522	GstWalk.Pde.u \|= X86_PDE_A;
523	GstWalk.pPde->u \|= X86_PDE_A;
524	if (uErr & X86_TRAP_PF_RW)
525	{
526	# ifdef VBOX_WITH_STATISTICS
527	if (!GstWalk.Pte.n.u1Dirty)
528	STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->CTX_MID_Z(Stat,DirtiedPage));
529	else
530	STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->CTX_MID_Z(Stat,PageAlreadyDirty));
531	# endif
532	GstWalk.Pte.u \|= X86_PTE_A \| X86_PTE_D;
533	GstWalk.pPte->u \|= X86_PTE_A \| X86_PTE_D;
534	}
535	else
536	{
537	GstWalk.Pte.u \|= X86_PTE_A;
538	GstWalk.pPte->u \|= X86_PTE_A;
539	}
540	Assert(GstWalk.Pte.u == GstWalk.pPte->u);
541	}
542	AssertMsg(GstWalk.Pde.u == GstWalk.pPde->u \|\| GstWalk.pPte->u == GstWalk.pPde->u,
543	("%RX64 %RX64 pPte=%p pPde=%p Pte=%RX64\n", (uint64_t)GstWalk.Pde.u, (uint64_t)GstWalk.pPde->u, GstWalk.pPte, GstWalk.pPde, (uint64_t)GstWalk.pPte->u));
544	# else /* !PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE) */
545	GSTPDE const PdeSrcDummy = { X86_PDE_P \| X86_PDE_US \| X86_PDE_RW \| X86_PDE_A}; /** @todo eliminate this */
546	# endif /* !PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE) */
547
548	/* Take the big lock now. */
549	*pfLockTaken = true;
550	pgmLock(pVM);
551
552	# ifdef PGM_WITH_MMIO_OPTIMIZATIONS
553	/*
554	* If it is a reserved bit fault we know that it is an MMIO (access
555	* handler) related fault and can skip some 200 lines of code.
556	*/
557	if (uErr & X86_TRAP_PF_RSVD)
558	{
559	Assert(uErr & X86_TRAP_PF_P);
560	PPGMPAGE pPage;
561	# if PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE)
562	rc = pgmPhysGetPageEx(pVM, GstWalk.Core.GCPhys, &pPage);
563	if (RT_SUCCESS(rc) && PGM_PAGE_HAS_ACTIVE_ALL_HANDLERS(pPage))
564	return VBOXSTRICTRC_TODO(PGM_BTH_NAME(Trap0eHandlerDoAccessHandlers)(pVCpu, uErr, pRegFrame, pvFault, pPage,
565	pfLockTaken, &GstWalk));
566	rc = PGM_BTH_NAME(SyncPage)(pVCpu, GstWalk.Pde, pvFault, 1, uErr);
567	# else
568	rc = pgmPhysGetPageEx(pVM, PGM_A20_APPLY(pVCpu, (RTGCPHYS)pvFault), &pPage);
569	if (RT_SUCCESS(rc) && PGM_PAGE_HAS_ACTIVE_ALL_HANDLERS(pPage))
570	return VBOXSTRICTRC_TODO(PGM_BTH_NAME(Trap0eHandlerDoAccessHandlers)(pVCpu, uErr, pRegFrame, pvFault, pPage,
571	pfLockTaken));
572	rc = PGM_BTH_NAME(SyncPage)(pVCpu, PdeSrcDummy, pvFault, 1, uErr);
573	# endif
574	AssertRC(rc);
575	PGM_INVL_PG(pVCpu, pvFault);
576	return rc; /* Restart with the corrected entry. */
577	}
578	# endif /* PGM_WITH_MMIO_OPTIMIZATIONS */
579
580	/*
581	* Fetch the guest PDE, PDPE and PML4E.
582	*/
583	# if PGM_SHW_TYPE == PGM_TYPE_32BIT
584	const unsigned iPDDst = pvFault >> SHW_PD_SHIFT;
585	PX86PD pPDDst = pgmShwGet32BitPDPtr(pVCpu);
586
587	# elif PGM_SHW_TYPE == PGM_TYPE_PAE
588	const unsigned iPDDst = (pvFault >> SHW_PD_SHIFT) & SHW_PD_MASK; /* pPDDst index, not used with the pool. */
589	PX86PDPAE pPDDst;
590	# if PGM_GST_TYPE == PGM_TYPE_PAE
591	rc = pgmShwSyncPaePDPtr(pVCpu, pvFault, GstWalk.Pdpe.u, &pPDDst);
592	# else
593	rc = pgmShwSyncPaePDPtr(pVCpu, pvFault, X86_PDPE_P, &pPDDst); /* RW, US and A are reserved in PAE mode. */
594	# endif
595	AssertMsgReturn(rc == VINF_SUCCESS, ("rc=%Rrc\n", rc), RT_FAILURE_NP(rc) ? rc : VERR_IPE_UNEXPECTED_INFO_STATUS);
596
597	# elif PGM_SHW_TYPE == PGM_TYPE_AMD64
598	const unsigned iPDDst = ((pvFault >> SHW_PD_SHIFT) & SHW_PD_MASK);
599	PX86PDPAE pPDDst;
600	# if PGM_GST_TYPE == PGM_TYPE_PROT /* (AMD-V nested paging) */
601	rc = pgmShwSyncLongModePDPtr(pVCpu, pvFault, X86_PML4E_P \| X86_PML4E_RW \| X86_PML4E_US \| X86_PML4E_A,
602	X86_PDPE_P \| X86_PDPE_RW \| X86_PDPE_US \| X86_PDPE_A, &pPDDst);
603	# else
604	rc = pgmShwSyncLongModePDPtr(pVCpu, pvFault, GstWalk.Pml4e.u, GstWalk.Pdpe.u, &pPDDst);
605	# endif
606	AssertMsgReturn(rc == VINF_SUCCESS, ("rc=%Rrc\n", rc), RT_FAILURE_NP(rc) ? rc : VERR_IPE_UNEXPECTED_INFO_STATUS);
607
608	# elif PGM_SHW_TYPE == PGM_TYPE_EPT
609	const unsigned iPDDst = ((pvFault >> SHW_PD_SHIFT) & SHW_PD_MASK);
610	PEPTPD pPDDst;
611	rc = pgmShwGetEPTPDPtr(pVCpu, pvFault, NULL, &pPDDst);
612	AssertMsgReturn(rc == VINF_SUCCESS, ("rc=%Rrc\n", rc), RT_FAILURE_NP(rc) ? rc : VERR_IPE_UNEXPECTED_INFO_STATUS);
613	# endif
614	Assert(pPDDst);
615
616	# if PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE)
617	/*
618	* Dirty page handling.
619	*
620	* If we successfully correct the write protection fault due to dirty bit
621	* tracking, then return immediately.
622	*/
623	if (uErr & X86_TRAP_PF_RW) /* write fault? */
624	{
625	STAM_PROFILE_START(&pVCpu->pgm.s.CTX_SUFF(pStats)->CTX_MID_Z(Stat,DirtyBitTracking), a);
626	rc = PGM_BTH_NAME(CheckDirtyPageFault)(pVCpu, uErr, &pPDDst->a[iPDDst], GstWalk.pPde, pvFault);
627	STAM_PROFILE_STOP(&pVCpu->pgm.s.CTX_SUFF(pStats)->CTX_MID_Z(Stat,DirtyBitTracking), a);
628	if (rc == VINF_PGM_HANDLED_DIRTY_BIT_FAULT)
629	{
630	STAM_STATS({ pVCpu->pgm.s.CTX_SUFF(pStatTrap0eAttribution)
631	= rc == VINF_PGM_HANDLED_DIRTY_BIT_FAULT
632	? &pVCpu->pgm.s.CTX_SUFF(pStats)->StatRZTrap0eTime2DirtyAndAccessed
633	: &pVCpu->pgm.s.CTX_SUFF(pStats)->StatRZTrap0eTime2GuestTrap; });
634	Log8(("Trap0eHandler: returns VINF_SUCCESS\n"));
635	return VINF_SUCCESS;
636	}
637	#ifdef DEBUG_bird
638	AssertMsg(GstWalk.Pde.u == GstWalk.pPde->u \|\| GstWalk.pPte->u == GstWalk.pPde->u \|\| pVM->cCpus > 1, ("%RX64 %RX64\n", (uint64_t)GstWalk.Pde.u, (uint64_t)GstWalk.pPde->u)); // - triggers with smp w7 guests.
639	AssertMsg(GstWalk.Core.fBigPage \|\| GstWalk.Pte.u == GstWalk.pPte->u \|\| pVM->cCpus > 1, ("%RX64 %RX64\n", (uint64_t)GstWalk.Pte.u, (uint64_t)GstWalk.pPte->u)); // - ditto.
640	#endif
641	}
642
643	# if 0 /* rarely useful; leave for debugging. */
644	STAM_COUNTER_INC(&pVCpu->pgm.s.StatRZTrap0ePD[iPDSrc]);
645	# endif
646	# endif /* PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE) */
647
648	/*
649	* A common case is the not-present error caused by lazy page table syncing.
650	*
651	* It is IMPORTANT that we weed out any access to non-present shadow PDEs
652	* here so we can safely assume that the shadow PT is present when calling
653	* SyncPage later.
654	*
655	* On failure, we ASSUME that SyncPT is out of memory or detected some kind
656	* of mapping conflict and defer to SyncCR3 in R3.
657	* (Again, we do NOT support access handlers for non-present guest pages.)
658	*
659	*/
660	# if PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE)
661	Assert(GstWalk.Pde.n.u1Present);
662	# endif
663	if ( !(uErr & X86_TRAP_PF_P) /* not set means page not present instead of page protection violation */
664	&& !pPDDst->a[iPDDst].n.u1Present)
665	{
666	STAM_STATS({ pVCpu->pgm.s.CTX_SUFF(pStatTrap0eAttribution) = &pVCpu->pgm.s.CTX_SUFF(pStats)->StatRZTrap0eTime2SyncPT; });
667	# if PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE)
668	LogFlow(("=>SyncPT %04x = %08RX64\n", (pvFault >> GST_PD_SHIFT) & GST_PD_MASK, (uint64_t)GstWalk.Pde.u));
669	rc = PGM_BTH_NAME(SyncPT)(pVCpu, (pvFault >> GST_PD_SHIFT) & GST_PD_MASK, GstWalk.pPd, pvFault);
670	# else
671	LogFlow(("=>SyncPT pvFault=%RGv\n", pvFault));
672	rc = PGM_BTH_NAME(SyncPT)(pVCpu, 0, NULL, pvFault);
673	# endif
674	if (RT_SUCCESS(rc))
675	return rc;
676	Log(("SyncPT: %RGv failed!! rc=%Rrc\n", pvFault, rc));
677	VMCPU_FF_SET(pVCpu, VMCPU_FF_PGM_SYNC_CR3); /** @todo no need to do global sync, right? */
678	return VINF_PGM_SYNC_CR3;
679	}
680
681	# if PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE) && !defined(PGM_WITHOUT_MAPPINGS)
682	/*
683	* Check if this address is within any of our mappings.
684	*
685	* This is very fast and it's gonna save us a bit of effort below and prevent
686	* us from screwing ourself with MMIO2 pages which have a GC Mapping (VRam).
687	* (BTW, it's impossible to have physical access handlers in a mapping.)
688	*/
689	if (pgmMapAreMappingsEnabled(pVM))
690	{
691	PPGMMAPPING pMapping = pVM->pgm.s.CTX_SUFF(pMappings);
692	for ( ; pMapping; pMapping = pMapping->CTX_SUFF(pNext))
693	{
694	if (pvFault < pMapping->GCPtr)
695	break;
696	if (pvFault - pMapping->GCPtr < pMapping->cb)
697	{
698	/*
699	* The first thing we check is if we've got an undetected conflict.
700	*/
701	if (pgmMapAreMappingsFloating(pVM))
702	{
703	unsigned iPT = pMapping->cb >> GST_PD_SHIFT;
704	while (iPT-- > 0)
705	if (GstWalk.pPde[iPT].n.u1Present)
706	{
707	STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->StatRZTrap0eConflicts);
708	Log(("Trap0e: Detected Conflict %RGv-%RGv\n", pMapping->GCPtr, pMapping->GCPtrLast));
709	VMCPU_FF_SET(pVCpu, VMCPU_FF_PGM_SYNC_CR3); /** @todo no need to do global sync,right? */
710	STAM_STATS({ pVCpu->pgm.s.CTX_SUFF(pStatTrap0eAttribution) = &pVCpu->pgm.s.CTX_SUFF(pStats)->StatRZTrap0eTime2Mapping; });
711	return VINF_PGM_SYNC_CR3;
712	}
713	}
714
715	/*
716	* Check if the fault address is in a virtual page access handler range.
717	*/
718	PPGMVIRTHANDLER pCur = (PPGMVIRTHANDLER)RTAvlroGCPtrRangeGet(&pVM->pgm.s.CTX_SUFF(pTrees)->HyperVirtHandlers,
719	pvFault);
720	if ( pCur
721	&& pvFault - pCur->Core.Key < pCur->cb
722	&& uErr & X86_TRAP_PF_RW)
723	{
724	VBOXSTRICTRC rcStrict;
725	# ifdef IN_RC
726	STAM_PROFILE_START(&pCur->Stat, h);
727	PPGMVIRTHANDLERTYPEINT pCurType = PGMVIRTANDLER_GET_TYPE(pVM, pCur);
728	void *pvUser = pCur->CTX_SUFF(pvUser);
729	pgmUnlock(pVM);
730	rcStrict = pCurType->CTX_SUFF(pfnPfHandler)(pVM, pVCpu, uErr, pRegFrame, pvFault, pCur->Core.Key,
731	pvFault - pCur->Core.Key, pvUser);
732	pgmLock(pVM);
733	STAM_PROFILE_STOP(&pCur->Stat, h);
734	# else
735	AssertFailed();
736	rcStrict = VINF_EM_RAW_EMULATE_INSTR; /* can't happen with VMX */
737	# endif
738	STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->StatRZTrap0eHandlersMapping);
739	STAM_STATS({ pVCpu->pgm.s.CTX_SUFF(pStatTrap0eAttribution) = &pVCpu->pgm.s.CTX_SUFF(pStats)->StatRZTrap0eTime2Mapping; });
740	return VBOXSTRICTRC_TODO(rcStrict);
741	}
742
743	/*
744	* Pretend we're not here and let the guest handle the trap.
745	*/
746	TRPMSetErrorCode(pVCpu, uErr & ~X86_TRAP_PF_P);
747	STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->StatRZTrap0eGuestPFMapping);
748	LogFlow(("PGM: Mapping access -> route trap to recompiler!\n"));
749	STAM_STATS({ pVCpu->pgm.s.CTX_SUFF(pStatTrap0eAttribution) = &pVCpu->pgm.s.CTX_SUFF(pStats)->StatRZTrap0eTime2Mapping; });
750	return VINF_EM_RAW_GUEST_TRAP;
751	}
752	}
753	} /* pgmAreMappingsEnabled(&pVM->pgm.s) */
754	# endif /* PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE) */
755
756	/*
757	* Check if this fault address is flagged for special treatment,
758	* which means we'll have to figure out the physical address and
759	* check flags associated with it.
760	*
761	* ASSUME that we can limit any special access handling to pages
762	* in page tables which the guest believes to be present.
763	*/
764	# if PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE)
765	RTGCPHYS GCPhys = GstWalk.Core.GCPhys & ~(RTGCPHYS)PAGE_OFFSET_MASK;
766	# else
767	RTGCPHYS GCPhys = PGM_A20_APPLY(pVCpu, (RTGCPHYS)pvFault & ~(RTGCPHYS)PAGE_OFFSET_MASK);
768	# endif /* PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE) */
769	PPGMPAGE pPage;
770	rc = pgmPhysGetPageEx(pVM, GCPhys, &pPage);
771	if (RT_FAILURE(rc))
772	{
773	/*
774	* When the guest accesses invalid physical memory (e.g. probing
775	* of RAM or accessing a remapped MMIO range), then we'll fall
776	* back to the recompiler to emulate the instruction.
777	*/
778	LogFlow(("PGM #PF: pgmPhysGetPageEx(%RGp) failed with %Rrc\n", GCPhys, rc));
779	STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->StatRZTrap0eHandlersInvalid);
780	STAM_STATS({ pVCpu->pgm.s.CTX_SUFF(pStatTrap0eAttribution) = &pVCpu->pgm.s.CTX_SUFF(pStats)->StatRZTrap0eTime2InvalidPhys; });
781	return VINF_EM_RAW_EMULATE_INSTR;
782	}
783
784	/*
785	* Any handlers for this page?
786	*/
787	if (PGM_PAGE_HAS_ACTIVE_HANDLERS(pPage))
788	# if PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE)
789	return VBOXSTRICTRC_TODO(PGM_BTH_NAME(Trap0eHandlerDoAccessHandlers)(pVCpu, uErr, pRegFrame, pvFault, pPage, pfLockTaken,
790	&GstWalk));
791	# else
792	return VBOXSTRICTRC_TODO(PGM_BTH_NAME(Trap0eHandlerDoAccessHandlers)(pVCpu, uErr, pRegFrame, pvFault, pPage, pfLockTaken));
793	# endif
794
795	# if PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE) && !defined(IN_RING0)
796	if (uErr & X86_TRAP_PF_P)
797	{
798	/*
799	* The page isn't marked, but it might still be monitored by a virtual page access handler.
800	* (ASSUMES no temporary disabling of virtual handlers.)
801	*/
802	/** @todo r=bird: Since the purpose is to catch out of sync pages with virtual handler(s) here,
803	* we should correct both the shadow page table and physical memory flags, and not only check for
804	* accesses within the handler region but for access to pages with virtual handlers. */
805	PPGMVIRTHANDLER pCur = (PPGMVIRTHANDLER)RTAvlroGCPtrRangeGet(&pVM->pgm.s.CTX_SUFF(pTrees)->VirtHandlers, pvFault);
806	if (pCur)
807	{
808	PPGMVIRTHANDLERTYPEINT pCurType = PGMVIRTANDLER_GET_TYPE(pVM, pCur);
809	AssertMsg( !(pvFault - pCur->Core.Key < pCur->cb)
810	\|\| ( pCurType->enmKind != PGMVIRTHANDLERKIND_WRITE
811	\|\| !(uErr & X86_TRAP_PF_P)
812	\|\| (pCurType->enmKind == PGMVIRTHANDLERKIND_WRITE && (uErr & X86_TRAP_PF_RW))),
813	("Unexpected trap for virtual handler: %08X (phys=%08x) %R[pgmpage] uErr=%X, enumKind=%d\n",
814	pvFault, GCPhys, pPage, uErr, pCurType->enmKind));
815
816	if ( pvFault - pCur->Core.Key < pCur->cb
817	&& ( uErr & X86_TRAP_PF_RW
818	\|\| pCurType->enmKind != PGMVIRTHANDLERKIND_WRITE ) )
819	{
820	VBOXSTRICTRC rcStrict;
821	# ifdef IN_RC
822	STAM_PROFILE_START(&pCur->Stat, h);
823	void *pvUser = pCur->CTX_SUFF(pvUser);
824	pgmUnlock(pVM);
825	rcStrict = pCurType->CTX_SUFF(pfnPfHandler)(pVM, pVCpu, uErr, pRegFrame, pvFault, pCur->Core.Key,
826	pvFault - pCur->Core.Key, pvUser);
827	pgmLock(pVM);
828	STAM_PROFILE_STOP(&pCur->Stat, h);
829	# else
830	rcStrict = VINF_EM_RAW_EMULATE_INSTR; /** @todo for VMX */
831	# endif
832	STAM_STATS({ pVCpu->pgm.s.CTX_SUFF(pStatTrap0eAttribution) = &pVCpu->pgm.s.CTX_SUFF(pStats)->StatRZTrap0eTime2HndVirt; });
833	return VBOXSTRICTRC_TODO(rcStrict);
834	}
835	}
836	}
837	# endif /* PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE) */
838
839	/*
840	* We are here only if page is present in Guest page tables and
841	* trap is not handled by our handlers.
842	*
843	* Check it for page out-of-sync situation.
844	*/
845	if (!(uErr & X86_TRAP_PF_P))
846	{
847	/*
848	* Page is not present in our page tables. Try to sync it!
849	*/
850	if (uErr & X86_TRAP_PF_US)
851	STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->CTX_MID_Z(Stat,PageOutOfSyncUser));
852	else /* supervisor */
853	STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->CTX_MID_Z(Stat,PageOutOfSyncSupervisor));
854
855	if (PGM_PAGE_IS_BALLOONED(pPage))
856	{
857	/* Emulate reads from ballooned pages as they are not present in
858	our shadow page tables. (Required for e.g. Solaris guests; soft
859	ecc, random nr generator.) */
860	rc = VBOXSTRICTRC_TODO(PGMInterpretInstruction(pVM, pVCpu, pRegFrame, pvFault));
861	LogFlow(("PGM: PGMInterpretInstruction balloon -> rc=%d pPage=%R[pgmpage]\n", rc, pPage));
862	STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->CTX_MID_Z(Stat,PageOutOfSyncBallloon));
863	STAM_STATS({ pVCpu->pgm.s.CTX_SUFF(pStatTrap0eAttribution) = &pVCpu->pgm.s.CTX_SUFF(pStats)->StatRZTrap0eTime2Ballooned; });
864	return rc;
865	}
866
867	# if defined(LOG_ENABLED) && !defined(IN_RING0)
868	RTGCPHYS GCPhys2;
869	uint64_t fPageGst2;
870	PGMGstGetPage(pVCpu, pvFault, &fPageGst2, &GCPhys2);
871	# if PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE)
872	Log(("Page out of sync: %RGv eip=%08x PdeSrc.US=%d fPageGst2=%08llx GCPhys2=%RGp scan=%d\n",
873	pvFault, pRegFrame->eip, GstWalk.Pde.n.u1User, fPageGst2, GCPhys2, CSAMDoesPageNeedScanning(pVM, pRegFrame->eip)));
874	# else
875	Log(("Page out of sync: %RGv eip=%08x fPageGst2=%08llx GCPhys2=%RGp scan=%d\n",
876	pvFault, pRegFrame->eip, fPageGst2, GCPhys2, CSAMDoesPageNeedScanning(pVM, pRegFrame->eip)));
877	# endif
878	# endif /* LOG_ENABLED */
879
880	# if PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE) && !defined(IN_RING0)
881	if ( !GstWalk.Core.fEffectiveUS
882	&& CSAMIsEnabled(pVM)
883	&& CPUMGetGuestCPL(pVCpu) == 0)
884	{
885	/* Note: Can't check for X86_TRAP_ID bit, because that requires execute disable support on the CPU. */
886	if ( pvFault == (RTGCPTR)pRegFrame->eip
887	\|\| pvFault - pRegFrame->eip < 8 /* instruction crossing a page boundary */
888	# ifdef CSAM_DETECT_NEW_CODE_PAGES
889	\|\| ( !PATMIsPatchGCAddr(pVM, pRegFrame->eip)
890	&& CSAMDoesPageNeedScanning(pVM, pRegFrame->eip)) /* any new code we encounter here */
891	# endif /* CSAM_DETECT_NEW_CODE_PAGES */
892	)
893	{
894	LogFlow(("CSAMExecFault %RX32\n", pRegFrame->eip));
895	rc = CSAMExecFault(pVM, (RTRCPTR)pRegFrame->eip);
896	if (rc != VINF_SUCCESS)
897	{
898	/*
899	* CSAM needs to perform a job in ring 3.
900	*
901	* Sync the page before going to the host context; otherwise we'll end up in a loop if
902	* CSAM fails (e.g. instruction crosses a page boundary and the next page is not present)
903	*/
904	LogFlow(("CSAM ring 3 job\n"));
905	int rc2 = PGM_BTH_NAME(SyncPage)(pVCpu, GstWalk.Pde, pvFault, 1, uErr);
906	AssertRC(rc2);
907
908	STAM_STATS({ pVCpu->pgm.s.CTX_SUFF(pStatTrap0eAttribution) = &pVCpu->pgm.s.CTX_SUFF(pStats)->StatRZTrap0eTime2CSAM; });
909	return rc;
910	}
911	}
912	# ifdef CSAM_DETECT_NEW_CODE_PAGES
913	else if ( uErr == X86_TRAP_PF_RW
914	&& pRegFrame->ecx >= 0x100 /* early check for movswd count */
915	&& pRegFrame->ecx < 0x10000)
916	{
917	/* In case of a write to a non-present supervisor shadow page, we'll take special precautions
918	* to detect loading of new code pages.
919	*/
920
921	/*
922	* Decode the instruction.
923	*/
924	PDISCPUSTATE pDis = &pVCpu->pgm.s.DisState;
925	uint32_t cbOp;
926	rc = EMInterpretDisasCurrent(pVM, pVCpu, pDis, &cbOp);
927
928	/* For now we'll restrict this to rep movsw/d instructions */
929	if ( rc == VINF_SUCCESS
930	&& pDis->pCurInstr->opcode == OP_MOVSWD
931	&& (pDis->prefix & DISPREFIX_REP))
932	{
933	CSAMMarkPossibleCodePage(pVM, pvFault);
934	}
935	}
936	# endif /* CSAM_DETECT_NEW_CODE_PAGES */
937
938	/*
939	* Mark this page as safe.
940	*/
941	/** @todo not correct for pages that contain both code and data!! */
942	Log2(("CSAMMarkPage %RGv; scanned=%d\n", pvFault, true));
943	CSAMMarkPage(pVM, pvFault, true);
944	}
945	# endif /* PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE) && !defined(IN_RING0) */
946	# if PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE)
947	rc = PGM_BTH_NAME(SyncPage)(pVCpu, GstWalk.Pde, pvFault, PGM_SYNC_NR_PAGES, uErr);
948	# else
949	rc = PGM_BTH_NAME(SyncPage)(pVCpu, PdeSrcDummy, pvFault, PGM_SYNC_NR_PAGES, uErr);
950	# endif
951	if (RT_SUCCESS(rc))
952	{
953	/* The page was successfully synced, return to the guest. */
954	STAM_STATS({ pVCpu->pgm.s.CTX_SUFF(pStatTrap0eAttribution) = &pVCpu->pgm.s.CTX_SUFF(pStats)->StatRZTrap0eTime2OutOfSync; });
955	return VINF_SUCCESS;
956	}
957	}
958	else /* uErr & X86_TRAP_PF_P: */
959	{
960	/*
961	* Write protected pages are made writable when the guest makes the
962	* first write to it. This happens for pages that are shared, write
963	* monitored or not yet allocated.
964	*
965	* We may also end up here when CR0.WP=0 in the guest.
966	*
967	* Also, a side effect of not flushing global PDEs are out of sync
968	* pages due to physical monitored regions, that are no longer valid.
969	* Assume for now it only applies to the read/write flag.
970	*/
971	if (uErr & X86_TRAP_PF_RW)
972	{
973	/*
974	* Check if it is a read-only page.
975	*/
976	if (PGM_PAGE_GET_STATE(pPage) != PGM_PAGE_STATE_ALLOCATED)
977	{
978	Log(("PGM #PF: Make writable: %RGp %R[pgmpage] pvFault=%RGp uErr=%#x\n", GCPhys, pPage, pvFault, uErr));
979	Assert(!PGM_PAGE_IS_ZERO(pPage));
980	AssertFatalMsg(!PGM_PAGE_IS_BALLOONED(pPage), ("Unexpected ballooned page at %RGp\n", GCPhys));
981	STAM_STATS({ pVCpu->pgm.s.CTX_SUFF(pStatTrap0eAttribution) = &pVCpu->pgm.s.CTX_SUFF(pStats)->StatRZTrap0eTime2MakeWritable; });
982
983	rc = pgmPhysPageMakeWritable(pVM, pPage, GCPhys);
984	if (rc != VINF_SUCCESS)
985	{
986	AssertMsg(rc == VINF_PGM_SYNC_CR3 \|\| RT_FAILURE(rc), ("%Rrc\n", rc));
987	return rc;
988	}
989	if (RT_UNLIKELY(VM_FF_IS_PENDING(pVM, VM_FF_PGM_NO_MEMORY)))
990	return VINF_EM_NO_MEMORY;
991	}
992
993	# if PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE)
994	/*
995	* Check to see if we need to emulate the instruction if CR0.WP=0.
996	*/
997	if ( !GstWalk.Core.fEffectiveRW
998	&& (CPUMGetGuestCR0(pVCpu) & (X86_CR0_WP \| X86_CR0_PG)) == X86_CR0_PG
999	&& CPUMGetGuestCPL(pVCpu) < 3)
1000	{
1001	Assert((uErr & (X86_TRAP_PF_RW \| X86_TRAP_PF_P)) == (X86_TRAP_PF_RW \| X86_TRAP_PF_P));
1002
1003	/*
1004	* The Netware WP0+RO+US hack.
1005	*
1006	* Netware sometimes(/always?) runs with WP0. It has been observed doing
1007	* excessive write accesses to pages which are mapped with US=1 and RW=0
1008	* while WP=0. This causes a lot of exits and extremely slow execution.
1009	* To avoid trapping and emulating every write here, we change the shadow
1010	* page table entry to map it as US=0 and RW=1 until user mode tries to
1011	* access it again (see further below). We count these shadow page table
1012	* changes so we can avoid having to clear the page pool every time the WP
1013	* bit changes to 1 (see PGMCr0WpEnabled()).
1014	*/
1015	# if (PGM_GST_TYPE == PGM_TYPE_32BIT \|\| PGM_GST_TYPE == PGM_TYPE_PAE) && 1
1016	if ( GstWalk.Core.fEffectiveUS
1017	&& !GstWalk.Core.fEffectiveRW
1018	&& (GstWalk.Core.fBigPage \|\| GstWalk.Pde.n.u1Write)
1019	&& pVM->cCpus == 1 /* Sorry, no go on SMP. Add CFGM option? */)
1020	{
1021	Log(("PGM #PF: Netware WP0+RO+US hack: pvFault=%RGp uErr=%#x (big=%d)\n", pvFault, uErr, GstWalk.Core.fBigPage));
1022	rc = pgmShwMakePageSupervisorAndWritable(pVCpu, pvFault, GstWalk.Core.fBigPage, PGM_MK_PG_IS_WRITE_FAULT);
1023	if (rc == VINF_SUCCESS \|\| rc == VINF_PGM_SYNC_CR3)
1024	{
1025	PGM_INVL_PG(pVCpu, pvFault);
1026	pVCpu->pgm.s.cNetwareWp0Hacks++;
1027	STAM_STATS({ pVCpu->pgm.s.CTX_SUFF(pStatTrap0eAttribution) = &pVCpu->pgm.s.CTX_SUFF(pStats)->StatRZTrap0eTime2Wp0RoUsHack; });
1028	return rc;
1029	}
1030	AssertMsg(RT_FAILURE_NP(rc), ("%Rrc\n", rc));
1031	Log(("pgmShwMakePageSupervisorAndWritable(%RGv) failed with rc=%Rrc - ignored\n", pvFault, rc));
1032	}
1033	# endif
1034
1035	/* Interpret the access. */
1036	rc = VBOXSTRICTRC_TODO(PGMInterpretInstruction(pVM, pVCpu, pRegFrame, pvFault));
1037	Log(("PGM #PF: WP0 emulation (pvFault=%RGp uErr=%#x cpl=%d fBig=%d fEffUs=%d)\n", pvFault, uErr, CPUMGetGuestCPL(pVCpu), GstWalk.Core.fBigPage, GstWalk.Core.fEffectiveUS));
1038	if (RT_SUCCESS(rc))
1039	STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->StatRZTrap0eWPEmulInRZ);
1040	else
1041	STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->StatRZTrap0eWPEmulToR3);
1042	STAM_STATS({ pVCpu->pgm.s.CTX_SUFF(pStatTrap0eAttribution) = &pVCpu->pgm.s.CTX_SUFF(pStats)->StatRZTrap0eTime2WPEmulation; });
1043	return rc;
1044	}
1045	# endif
1046	/// @todo count the above case; else
1047	if (uErr & X86_TRAP_PF_US)
1048	STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->CTX_MID_Z(Stat,PageOutOfSyncUserWrite));
1049	else /* supervisor */
1050	STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->CTX_MID_Z(Stat,PageOutOfSyncSupervisorWrite));
1051
1052	/*
1053	* Sync the page.
1054	*
1055	* Note: Do NOT use PGM_SYNC_NR_PAGES here. That only works if the
1056	* page is not present, which is not true in this case.
1057	*/
1058	# if PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE)
1059	rc = PGM_BTH_NAME(SyncPage)(pVCpu, GstWalk.Pde, pvFault, 1, uErr);
1060	# else
1061	rc = PGM_BTH_NAME(SyncPage)(pVCpu, PdeSrcDummy, pvFault, 1, uErr);
1062	# endif
1063	if (RT_SUCCESS(rc))
1064	{
1065	/*
1066	* Page was successfully synced, return to guest but invalidate
1067	* the TLB first as the page is very likely to be in it.
1068	*/
1069	# if PGM_SHW_TYPE == PGM_TYPE_EPT
1070	HMInvalidatePhysPage(pVM, (RTGCPHYS)pvFault);
1071	# else
1072	PGM_INVL_PG(pVCpu, pvFault);
1073	# endif
1074	# ifdef VBOX_STRICT
1075	RTGCPHYS GCPhys2 = RTGCPHYS_MAX;
1076	uint64_t fPageGst = UINT64_MAX;
1077	if (!pVM->pgm.s.fNestedPaging)
1078	{
1079	rc = PGMGstGetPage(pVCpu, pvFault, &fPageGst, &GCPhys2);
1080	AssertMsg(RT_SUCCESS(rc) && ((fPageGst & X86_PTE_RW) \|\| ((CPUMGetGuestCR0(pVCpu) & (X86_CR0_WP \| X86_CR0_PG)) == X86_CR0_PG && CPUMGetGuestCPL(pVCpu) < 3)), ("rc=%Rrc fPageGst=%RX64\n", rc, fPageGst));
1081	LogFlow(("Obsolete physical monitor page out of sync %RGv - phys %RGp flags=%08llx\n", pvFault, GCPhys2, (uint64_t)fPageGst));
1082	}
1083	# if 0 /* Bogus! Triggers incorrectly with w7-64 and later for the SyncPage case: "Pde at %RGv changed behind our back?" */
1084	uint64_t fPageShw = 0;
1085	rc = PGMShwGetPage(pVCpu, pvFault, &fPageShw, NULL);
1086	AssertMsg((RT_SUCCESS(rc) && (fPageShw & X86_PTE_RW)) \|\| pVM->cCpus > 1 /* new monitor can be installed/page table flushed between the trap exit and PGMTrap0eHandler */,
1087	("rc=%Rrc fPageShw=%RX64 GCPhys2=%RGp fPageGst=%RX64 pvFault=%RGv\n", rc, fPageShw, GCPhys2, fPageGst, pvFault));
1088	# endif
1089	# endif /* VBOX_STRICT */
1090	STAM_STATS({ pVCpu->pgm.s.CTX_SUFF(pStatTrap0eAttribution) = &pVCpu->pgm.s.CTX_SUFF(pStats)->StatRZTrap0eTime2OutOfSyncHndObs; });
1091	return VINF_SUCCESS;
1092	}
1093	}
1094	# if PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE)
1095	/*
1096	* Check for Netware WP0+RO+US hack from above and undo it when user
1097	* mode accesses the page again.
1098	*/
1099	else if ( GstWalk.Core.fEffectiveUS
1100	&& !GstWalk.Core.fEffectiveRW
1101	&& (GstWalk.Core.fBigPage \|\| GstWalk.Pde.n.u1Write)
1102	&& pVCpu->pgm.s.cNetwareWp0Hacks > 0
1103	&& (CPUMGetGuestCR0(pVCpu) & (X86_CR0_WP \| X86_CR0_PG)) == X86_CR0_PG
1104	&& CPUMGetGuestCPL(pVCpu) == 3
1105	&& pVM->cCpus == 1
1106	)
1107	{
1108	Log(("PGM #PF: Undo netware WP0+RO+US hack: pvFault=%RGp uErr=%#x\n", pvFault, uErr));
1109	rc = PGM_BTH_NAME(SyncPage)(pVCpu, GstWalk.Pde, pvFault, 1, uErr);
1110	if (RT_SUCCESS(rc))
1111	{
1112	PGM_INVL_PG(pVCpu, pvFault);
1113	pVCpu->pgm.s.cNetwareWp0Hacks--;
1114	STAM_STATS({ pVCpu->pgm.s.CTX_SUFF(pStatTrap0eAttribution) = &pVCpu->pgm.s.CTX_SUFF(pStats)->StatRZTrap0eTime2Wp0RoUsUnhack; });
1115	return VINF_SUCCESS;
1116	}
1117	}
1118	# endif /* PGM_WITH_PAGING */
1119
1120	/** @todo else: why are we here? */
1121
1122	# if PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE) && defined(VBOX_STRICT)
1123	/*
1124	* Check for VMM page flags vs. Guest page flags consistency.
1125	* Currently only for debug purposes.
1126	*/
1127	if (RT_SUCCESS(rc))
1128	{
1129	/* Get guest page flags. */
1130	uint64_t fPageGst;
1131	int rc2 = PGMGstGetPage(pVCpu, pvFault, &fPageGst, NULL);
1132	if (RT_SUCCESS(rc2))
1133	{
1134	uint64_t fPageShw = 0;
1135	rc2 = PGMShwGetPage(pVCpu, pvFault, &fPageShw, NULL);
1136
1137	#if 0
1138	/*
1139	* Compare page flags.
1140	* Note: we have AVL, A, D bits desynced.
1141	*/
1142	AssertMsg( (fPageShw & ~(X86_PTE_A \| X86_PTE_D \| X86_PTE_AVL_MASK))
1143	== (fPageGst & ~(X86_PTE_A \| X86_PTE_D \| X86_PTE_AVL_MASK))
1144	\|\| ( pVCpu->pgm.s.cNetwareWp0Hacks > 0
1145	&& (fPageShw & ~(X86_PTE_A \| X86_PTE_D \| X86_PTE_AVL_MASK \| X86_PTE_RW \| X86_PTE_US))
1146	== (fPageGst & ~(X86_PTE_A \| X86_PTE_D \| X86_PTE_AVL_MASK \| X86_PTE_RW \| X86_PTE_US))
1147	&& (fPageShw & (X86_PTE_RW \| X86_PTE_US)) == X86_PTE_RW
1148	&& (fPageGst & (X86_PTE_RW \| X86_PTE_US)) == X86_PTE_US),
1149	("Page flags mismatch! pvFault=%RGv uErr=%x GCPhys=%RGp fPageShw=%RX64 fPageGst=%RX64 rc=%d\n",
1150	pvFault, (uint32_t)uErr, GCPhys, fPageShw, fPageGst, rc));
1151	01:01:15.623511 00:08:43.266063 Expression: (fPageShw & ~(X86_PTE_A \| X86_PTE_D \| X86_PTE_AVL_MASK)) == (fPageGst & ~(X86_PTE_A \| X86_PTE_D \| X86_PTE_AVL_MASK)) \|\| ( pVCpu->pgm.s.cNetwareWp0Hacks > 0 && (fPageShw & ~(X86_PTE_A \| X86_PTE_D \| X86_PTE_AVL_MASK \| X86_PTE_RW \| X86_PTE_US)) == (fPageGst & ~(X86_PTE_A \| X86_PTE_D \| X86_PTE_AVL_MASK \| X86_PTE_RW \| X86_PTE_US)) && (fPageShw & (X86_PTE_RW \| X86_PTE_US)) == X86_PTE_RW && (fPageGst & (X86_PTE_RW \| X86_PTE_US)) == X86_PTE_US)
1152	01:01:15.623511 00:08:43.266064 Location : e:\vbox\svn\trunk\srcPage flags mismatch! pvFault=fffff801b0d7b000 uErr=11 GCPhys=0000000019b52000 fPageShw=0 fPageGst=77b0000000000121 rc=0
1153
1154	01:01:15.625516 00:08:43.268051 Expression: (fPageShw & ~(X86_PTE_A \| X86_PTE_D \| X86_PTE_AVL_MASK)) == (fPageGst & ~(X86_PTE_A \| X86_PTE_D \| X86_PTE_AVL_MASK)) \|\| ( pVCpu->pgm.s.cNetwareWp0Hacks > 0 && (fPageShw & ~(X86_PTE_A \| X86_PTE_D \| X86_PTE_AVL_MASK \| X86_PTE_RW \| X86_PTE_US)) == (fPageGst & ~(X86_PTE_A \| X86_PTE_D \| X86_PTE_AVL_MASK \| X86_PTE_RW \| X86_PTE_US)) && (fPageShw & (X86_PTE_RW \| X86_PTE_US)) == X86_PTE_RW && (fPageGst & (X86_PTE_RW \| X86_PTE_US)) == X86_PTE_US)
1155	01:01:15.625516 00:08:43.268051 Location :
1156	e:\vbox\svn\trunk\srcPage flags mismatch!
1157	pvFault=fffff801b0d7b000
1158	uErr=11 X86_TRAP_PF_ID \| X86_TRAP_PF_P
1159	GCPhys=0000000019b52000
1160	fPageShw=0
1161	fPageGst=77b0000000000121
1162	rc=0
1163	#endif
1164
1165	}
1166	else
1167	AssertMsgFailed(("PGMGstGetPage rc=%Rrc\n", rc));
1168	}
1169	else
1170	AssertMsgFailed(("PGMGCGetPage rc=%Rrc\n", rc));
1171	# endif /* PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE) && VBOX_STRICT */
1172	}
1173
1174
1175	/*
1176	* If we get here it is because something failed above, i.e. most like guru
1177	* meditiation time.
1178	*/
1179	LogRel(("%s: returns rc=%Rrc pvFault=%RGv uErr=%RX64 cs:rip=%04x:%08RX64\n",
1180	__PRETTY_FUNCTION__, rc, pvFault, (uint64_t)uErr, pRegFrame->cs.Sel, pRegFrame->rip));
1181	return rc;
1182
1183	# else /* Nested paging, EPT except PGM_GST_TYPE = PROT */
1184	NOREF(uErr); NOREF(pRegFrame); NOREF(pvFault);
1185	AssertReleaseMsgFailed(("Shw=%d Gst=%d is not implemented!\n", PGM_SHW_TYPE, PGM_GST_TYPE));
1186	return VERR_PGM_NOT_USED_IN_MODE;
1187	# endif
1188	}
1189	#endif /* !IN_RING3 */
1190
1191
1192	/**
1193	* Emulation of the invlpg instruction.
1194	*
1195	*
1196	* @returns VBox status code.
1197	*
1198	* @param pVCpu The cross context virtual CPU structure.
1199	* @param GCPtrPage Page to invalidate.
1200	*
1201	* @remark ASSUMES that the guest is updating before invalidating. This order
1202	* isn't required by the CPU, so this is speculative and could cause
1203	* trouble.
1204	* @remark No TLB shootdown is done on any other VCPU as we assume that
1205	* invlpg emulation is the only reason for calling this function.
1206	* (The guest has to shoot down TLB entries on other CPUs itself)
1207	* Currently true, but keep in mind!
1208	*
1209	* @todo Clean this up! Most of it is (or should be) no longer necessary as we catch all page table accesses.
1210	* Should only be required when PGMPOOL_WITH_OPTIMIZED_DIRTY_PT is active (PAE or AMD64 (for now))
1211	*/
1212	PGM_BTH_DECL(int, InvalidatePage)(PVMCPU pVCpu, RTGCPTR GCPtrPage)
1213	{
1214	#if PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE) \
1215	&& PGM_SHW_TYPE != PGM_TYPE_NESTED \
1216	&& PGM_SHW_TYPE != PGM_TYPE_EPT
1217	int rc;
1218	PVM pVM = pVCpu->CTX_SUFF(pVM);
1219	PPGMPOOL pPool = pVM->pgm.s.CTX_SUFF(pPool);
1220
1221	PGM_LOCK_ASSERT_OWNER(pVM);
1222
1223	LogFlow(("InvalidatePage %RGv\n", GCPtrPage));
1224
1225	/*
1226	* Get the shadow PD entry and skip out if this PD isn't present.
1227	* (Guessing that it is frequent for a shadow PDE to not be present, do this first.)
1228	*/
1229	# if PGM_SHW_TYPE == PGM_TYPE_32BIT
1230	const unsigned iPDDst = (uint32_t)GCPtrPage >> SHW_PD_SHIFT;
1231	PX86PDE pPdeDst = pgmShwGet32BitPDEPtr(pVCpu, GCPtrPage);
1232
1233	/* Fetch the pgm pool shadow descriptor. */
1234	PPGMPOOLPAGE pShwPde = pVCpu->pgm.s.CTX_SUFF(pShwPageCR3);
1235	# ifdef IN_RING3 /* Possible we didn't resync yet when called from REM. */
1236	if (!pShwPde)
1237	{
1238	STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->CTX_MID_Z(Stat,InvalidatePageSkipped));
1239	return VINF_SUCCESS;
1240	}
1241	# else
1242	Assert(pShwPde);
1243	# endif
1244
1245	# elif PGM_SHW_TYPE == PGM_TYPE_PAE
1246	const unsigned iPdpt = (uint32_t)GCPtrPage >> X86_PDPT_SHIFT;
1247	PX86PDPT pPdptDst = pgmShwGetPaePDPTPtr(pVCpu);
1248
1249	/* If the shadow PDPE isn't present, then skip the invalidate. */
1250	# ifdef IN_RING3 /* Possible we didn't resync yet when called from REM. */
1251	if (!pPdptDst \|\| !pPdptDst->a[iPdpt].n.u1Present)
1252	# else
1253	if (!pPdptDst->a[iPdpt].n.u1Present)
1254	# endif
1255	{
1256	Assert(!pPdptDst \|\| !(pPdptDst->a[iPdpt].u & PGM_PLXFLAGS_MAPPING));
1257	STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->CTX_MID_Z(Stat,InvalidatePageSkipped));
1258	PGM_INVL_PG(pVCpu, GCPtrPage);
1259	return VINF_SUCCESS;
1260	}
1261
1262	const unsigned iPDDst = (GCPtrPage >> SHW_PD_SHIFT) & SHW_PD_MASK;
1263	PPGMPOOLPAGE pShwPde = NULL;
1264	PX86PDPAE pPDDst;
1265
1266	/* Fetch the pgm pool shadow descriptor. */
1267	rc = pgmShwGetPaePoolPagePD(pVCpu, GCPtrPage, &pShwPde);
1268	AssertRCSuccessReturn(rc, rc);
1269	Assert(pShwPde);
1270
1271	pPDDst = (PX86PDPAE)PGMPOOL_PAGE_2_PTR_V2(pVM, pVCpu, pShwPde);
1272	PX86PDEPAE pPdeDst = &pPDDst->a[iPDDst];
1273
1274	# else /* PGM_SHW_TYPE == PGM_TYPE_AMD64 */
1275	/* PML4 */
1276	/const unsigned iPml4 = (GCPtrPage >> X86_PML4_SHIFT) & X86_PML4_MASK;/
1277	const unsigned iPdpt = (GCPtrPage >> X86_PDPT_SHIFT) & X86_PDPT_MASK_AMD64;
1278	const unsigned iPDDst = (GCPtrPage >> SHW_PD_SHIFT) & SHW_PD_MASK;
1279	PX86PDPAE pPDDst;
1280	PX86PDPT pPdptDst;
1281	PX86PML4E pPml4eDst;
1282	rc = pgmShwGetLongModePDPtr(pVCpu, GCPtrPage, &pPml4eDst, &pPdptDst, &pPDDst);
1283	if (rc != VINF_SUCCESS)
1284	{
1285	AssertMsg(rc == VERR_PAGE_DIRECTORY_PTR_NOT_PRESENT \|\| rc == VERR_PAGE_MAP_LEVEL4_NOT_PRESENT, ("Unexpected rc=%Rrc\n", rc));
1286	STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->CTX_MID_Z(Stat,InvalidatePageSkipped));
1287	PGM_INVL_PG(pVCpu, GCPtrPage);
1288	return VINF_SUCCESS;
1289	}
1290	Assert(pPDDst);
1291
1292	PX86PDEPAE pPdeDst = &pPDDst->a[iPDDst];
1293	PX86PDPE pPdpeDst = &pPdptDst->a[iPdpt];
1294
1295	if (!pPdpeDst->n.u1Present)
1296	{
1297	STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->CTX_MID_Z(Stat,InvalidatePageSkipped));
1298	PGM_INVL_PG(pVCpu, GCPtrPage);
1299	return VINF_SUCCESS;
1300	}
1301
1302	/* Fetch the pgm pool shadow descriptor. */
1303	PPGMPOOLPAGE pShwPde = pgmPoolGetPage(pPool, pPdptDst->a[iPdpt].u & SHW_PDPE_PG_MASK);
1304	Assert(pShwPde);
1305
1306	# endif /* PGM_SHW_TYPE == PGM_TYPE_AMD64 */
1307
1308	const SHWPDE PdeDst = *pPdeDst;
1309	if (!PdeDst.n.u1Present)
1310	{
1311	STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->CTX_MID_Z(Stat,InvalidatePageSkipped));
1312	PGM_INVL_PG(pVCpu, GCPtrPage);
1313	return VINF_SUCCESS;
1314	}
1315
1316	/*
1317	* Get the guest PD entry and calc big page.
1318	*/
1319	# if PGM_GST_TYPE == PGM_TYPE_32BIT
1320	PGSTPD pPDSrc = pgmGstGet32bitPDPtr(pVCpu);
1321	const unsigned iPDSrc = (uint32_t)GCPtrPage >> GST_PD_SHIFT;
1322	GSTPDE PdeSrc = pPDSrc->a[iPDSrc];
1323	# else /* PGM_GST_TYPE != PGM_TYPE_32BIT */
1324	unsigned iPDSrc = 0;
1325	# if PGM_GST_TYPE == PGM_TYPE_PAE
1326	X86PDPE PdpeSrcIgn;
1327	PX86PDPAE pPDSrc = pgmGstGetPaePDPtr(pVCpu, GCPtrPage, &iPDSrc, &PdpeSrcIgn);
1328	# else /* AMD64 */
1329	PX86PML4E pPml4eSrcIgn;
1330	X86PDPE PdpeSrcIgn;
1331	PX86PDPAE pPDSrc = pgmGstGetLongModePDPtr(pVCpu, GCPtrPage, &pPml4eSrcIgn, &PdpeSrcIgn, &iPDSrc);
1332	# endif
1333	GSTPDE PdeSrc;
1334
1335	if (pPDSrc)
1336	PdeSrc = pPDSrc->a[iPDSrc];
1337	else
1338	PdeSrc.u = 0;
1339	# endif /* PGM_GST_TYPE != PGM_TYPE_32BIT */
1340	const bool fWasBigPage = RT_BOOL(PdeDst.u & PGM_PDFLAGS_BIG_PAGE);
1341	const bool fIsBigPage = PdeSrc.b.u1Size && GST_IS_PSE_ACTIVE(pVCpu);
1342	if (fWasBigPage != fIsBigPage)
1343	STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->CTX_MID_Z(Stat,InvalidatePageSkipped));
1344
1345	# ifdef IN_RING3
1346	/*
1347	* If a CR3 Sync is pending we may ignore the invalidate page operation
1348	* depending on the kind of sync and if it's a global page or not.
1349	* This doesn't make sense in GC/R0 so we'll skip it entirely there.
1350	*/
1351	# ifdef PGM_SKIP_GLOBAL_PAGEDIRS_ON_NONGLOBAL_FLUSH
1352	if ( VMCPU_FF_IS_SET(pVCpu, VMCPU_FF_PGM_SYNC_CR3)
1353	\|\| ( VMCPU_FF_IS_SET(pVCpu, VMCPU_FF_PGM_SYNC_CR3_NON_GLOBAL)
1354	&& fIsBigPage
1355	&& PdeSrc.b.u1Global
1356	)
1357	)
1358	# else
1359	if (VM_FF_IS_PENDING(pVM, VM_FF_PGM_SYNC_CR3 \| VM_FF_PGM_SYNC_CR3_NON_GLOBAL) )
1360	# endif
1361	{
1362	STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->CTX_MID_Z(Stat,InvalidatePageSkipped));
1363	return VINF_SUCCESS;
1364	}
1365	# endif /* IN_RING3 */
1366
1367	/*
1368	* Deal with the Guest PDE.
1369	*/
1370	rc = VINF_SUCCESS;
1371	if (PdeSrc.n.u1Present)
1372	{
1373	Assert( PdeSrc.n.u1User == PdeDst.n.u1User
1374	&& (PdeSrc.n.u1Write \|\| !PdeDst.n.u1Write \|\| pVCpu->pgm.s.cNetwareWp0Hacks > 0));
1375	# ifndef PGM_WITHOUT_MAPPING
1376	if (PdeDst.u & PGM_PDFLAGS_MAPPING)
1377	{
1378	/*
1379	* Conflict - Let SyncPT deal with it to avoid duplicate code.
1380	*/
1381	Assert(pgmMapAreMappingsEnabled(pVM));
1382	Assert(PGMGetGuestMode(pVCpu) <= PGMMODE_PAE);
1383	rc = PGM_BTH_NAME(SyncPT)(pVCpu, iPDSrc, pPDSrc, GCPtrPage);
1384	}
1385	else
1386	# endif /* !PGM_WITHOUT_MAPPING */
1387	if (!fIsBigPage)
1388	{
1389	/*
1390	* 4KB - page.
1391	*/
1392	PPGMPOOLPAGE pShwPage = pgmPoolGetPage(pPool, PdeDst.u & SHW_PDE_PG_MASK);
1393	RTGCPHYS GCPhys = GST_GET_PDE_GCPHYS(PdeSrc);
1394
1395	# if PGM_SHW_TYPE == PGM_TYPE_PAE && PGM_GST_TYPE == PGM_TYPE_32BIT
1396	/* Select the right PDE as we're emulating a 4kb page table with 2 shadow page tables. */
1397	GCPhys = PGM_A20_APPLY(pVCpu, GCPhys \| ((iPDDst & 1) * (PAGE_SIZE / 2)));
1398	# endif
1399	if (pShwPage->GCPhys == GCPhys)
1400	{
1401	/* Syncing it here isn't 100% safe and it's probably not worth spending time syncing it. */
1402	PSHWPT pPTDst = (PSHWPT)PGMPOOL_PAGE_2_PTR_V2(pVM, pVCpu, pShwPage);
1403
1404	PGSTPT pPTSrc;
1405	rc = PGM_GCPHYS_2_PTR_V2(pVM, pVCpu, GST_GET_PDE_GCPHYS(PdeSrc), &pPTSrc);
1406	if (RT_SUCCESS(rc))
1407	{
1408	const unsigned iPTSrc = (GCPtrPage >> GST_PT_SHIFT) & GST_PT_MASK;
1409	GSTPTE PteSrc = pPTSrc->a[iPTSrc];
1410	const unsigned iPTDst = (GCPtrPage >> SHW_PT_SHIFT) & SHW_PT_MASK;
1411	PGM_BTH_NAME(SyncPageWorker)(pVCpu, &pPTDst->a[iPTDst], PdeSrc, PteSrc, pShwPage, iPTDst);
1412	Log2(("SyncPage: 4K %RGv PteSrc:{P=%d RW=%d U=%d raw=%08llx} PteDst=%08llx %s\n",
1413	GCPtrPage, PteSrc.n.u1Present,
1414	PteSrc.n.u1Write & PdeSrc.n.u1Write,
1415	PteSrc.n.u1User & PdeSrc.n.u1User,
1416	(uint64_t)PteSrc.u,
1417	SHW_PTE_LOG64(pPTDst->a[iPTDst]),
1418	SHW_PTE_IS_TRACK_DIRTY(pPTDst->a[iPTDst]) ? " Track-Dirty" : ""));
1419	}
1420	STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->CTX_MID_Z(Stat,InvalidatePage4KBPages));
1421	PGM_INVL_PG(pVCpu, GCPtrPage);
1422	}
1423	else
1424	{
1425	/*
1426	* The page table address changed.
1427	*/
1428	LogFlow(("InvalidatePage: Out-of-sync at %RGp PdeSrc=%RX64 PdeDst=%RX64 ShwGCPhys=%RGp iPDDst=%#x\n",
1429	GCPtrPage, (uint64_t)PdeSrc.u, (uint64_t)PdeDst.u, pShwPage->GCPhys, iPDDst));
1430	pgmPoolFree(pVM, PdeDst.u & SHW_PDE_PG_MASK, pShwPde->idx, iPDDst);
1431	ASMAtomicWriteSize(pPdeDst, 0);
1432	STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->CTX_MID_Z(Stat,InvalidatePagePDOutOfSync));
1433	PGM_INVL_VCPU_TLBS(pVCpu);
1434	}
1435	}
1436	else
1437	{
1438	/*
1439	* 2/4MB - page.
1440	*/
1441	/* Before freeing the page, check if anything really changed. */
1442	PPGMPOOLPAGE pShwPage = pgmPoolGetPage(pPool, PdeDst.u & SHW_PDE_PG_MASK);
1443	RTGCPHYS GCPhys = GST_GET_BIG_PDE_GCPHYS(pVM, PdeSrc);
1444	# if PGM_SHW_TYPE == PGM_TYPE_PAE && PGM_GST_TYPE == PGM_TYPE_32BIT
1445	/* Select the right PDE as we're emulating a 4MB page directory with two 2 MB shadow PDEs.*/
1446	GCPhys = PGM_A20_APPLY(pVCpu, GCPhys \| (GCPtrPage & (1 << X86_PD_PAE_SHIFT)));
1447	# endif
1448	if ( pShwPage->GCPhys == GCPhys
1449	&& pShwPage->enmKind == BTH_PGMPOOLKIND_PT_FOR_BIG)
1450	{
1451	/* ASSUMES a the given bits are identical for 4M and normal PDEs */
1452	/** @todo This test is wrong as it cannot check the G bit!
1453	* FIXME */
1454	if ( (PdeSrc.u & (X86_PDE_P \| X86_PDE_RW \| X86_PDE_US))
1455	== (PdeDst.u & (X86_PDE_P \| X86_PDE_RW \| X86_PDE_US))
1456	&& ( PdeSrc.b.u1Dirty /** @todo rainy day: What about read-only 4M pages? not very common, but still... */
1457	\|\| (PdeDst.u & PGM_PDFLAGS_TRACK_DIRTY)))
1458	{
1459	LogFlow(("Skipping flush for big page containing %RGv (PD=%X .u=%RX64)-> nothing has changed!\n", GCPtrPage, iPDSrc, PdeSrc.u));
1460	STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->CTX_MID_Z(Stat,InvalidatePage4MBPagesSkip));
1461	return VINF_SUCCESS;
1462	}
1463	}
1464
1465	/*
1466	* Ok, the page table is present and it's been changed in the guest.
1467	* If we're in host context, we'll just mark it as not present taking the lazy approach.
1468	* We could do this for some flushes in GC too, but we need an algorithm for
1469	* deciding which 4MB pages containing code likely to be executed very soon.
1470	*/
1471	LogFlow(("InvalidatePage: Out-of-sync PD at %RGp PdeSrc=%RX64 PdeDst=%RX64\n",
1472	GCPtrPage, (uint64_t)PdeSrc.u, (uint64_t)PdeDst.u));
1473	pgmPoolFree(pVM, PdeDst.u & SHW_PDE_PG_MASK, pShwPde->idx, iPDDst);
1474	ASMAtomicWriteSize(pPdeDst, 0);
1475	STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->CTX_MID_Z(Stat,InvalidatePage4MBPages));
1476	PGM_INVL_BIG_PG(pVCpu, GCPtrPage);
1477	}
1478	}
1479	else
1480	{
1481	/*
1482	* Page directory is not present, mark shadow PDE not present.
1483	*/
1484	if (!(PdeDst.u & PGM_PDFLAGS_MAPPING))
1485	{
1486	pgmPoolFree(pVM, PdeDst.u & SHW_PDE_PG_MASK, pShwPde->idx, iPDDst);
1487	ASMAtomicWriteSize(pPdeDst, 0);
1488	STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->CTX_MID_Z(Stat,InvalidatePagePDNPs));
1489	PGM_INVL_PG(pVCpu, GCPtrPage);
1490	}
1491	else
1492	{
1493	Assert(pgmMapAreMappingsEnabled(pVM));
1494	STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->CTX_MID_Z(Stat,InvalidatePagePDMappings));
1495	}
1496	}
1497	return rc;
1498
1499	#else /* guest real and protected mode */
1500	/* There's no such thing as InvalidatePage when paging is disabled, so just ignore. */
1501	NOREF(pVCpu); NOREF(GCPtrPage);
1502	return VINF_SUCCESS;
1503	#endif
1504	}
1505
1506
1507	/**
1508	* Update the tracking of shadowed pages.
1509	*
1510	* @param pVCpu The cross context virtual CPU structure.
1511	* @param pShwPage The shadow page.
1512	* @param HCPhys The physical page we is being dereferenced.
1513	* @param iPte Shadow PTE index
1514	* @param GCPhysPage Guest physical address (only valid if pShwPage->fDirty is set)
1515	*/
1516	DECLINLINE(void) PGM_BTH_NAME(SyncPageWorkerTrackDeref)(PVMCPU pVCpu, PPGMPOOLPAGE pShwPage, RTHCPHYS HCPhys, uint16_t iPte,
1517	RTGCPHYS GCPhysPage)
1518	{
1519	PVM pVM = pVCpu->CTX_SUFF(pVM);
1520
1521	# if defined(PGMPOOL_WITH_OPTIMIZED_DIRTY_PT) \
1522	&& PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE) \
1523	&& (PGM_GST_TYPE == PGM_TYPE_PAE \|\| PGM_GST_TYPE == PGM_TYPE_AMD64 \|\| PGM_SHW_TYPE == PGM_TYPE_PAE /* pae/32bit combo */)
1524
1525	/* Use the hint we retrieved from the cached guest PT. */
1526	if (pShwPage->fDirty)
1527	{
1528	PPGMPOOL pPool = pVM->pgm.s.CTX_SUFF(pPool);
1529
1530	Assert(pShwPage->cPresent);
1531	Assert(pPool->cPresent);
1532	pShwPage->cPresent--;
1533	pPool->cPresent--;
1534
1535	PPGMPAGE pPhysPage = pgmPhysGetPage(pVM, GCPhysPage);
1536	AssertRelease(pPhysPage);
1537	pgmTrackDerefGCPhys(pPool, pShwPage, pPhysPage, iPte);
1538	return;
1539	}
1540	# else
1541	NOREF(GCPhysPage);
1542	# endif
1543
1544	STAM_PROFILE_START(&pVM->pgm.s.CTX_SUFF(pStats)->StatTrackDeref, a);
1545	LogFlow(("SyncPageWorkerTrackDeref: Damn HCPhys=%RHp pShwPage->idx=%#x!!!\n", HCPhys, pShwPage->idx));
1546
1547	/** @todo If this turns out to be a bottle neck (very likely) two things can be done:
1548	* 1. have a medium sized HCPhys -> GCPhys TLB (hash?)
1549	* 2. write protect all shadowed pages. I.e. implement caching.
1550	*/
1551	/** @todo duplicated in the 2nd half of pgmPoolTracDerefGCPhysHint */
1552
1553	/*
1554	* Find the guest address.
1555	*/
1556	for (PPGMRAMRANGE pRam = pVM->pgm.s.CTX_SUFF(pRamRangesX);
1557	pRam;
1558	pRam = pRam->CTX_SUFF(pNext))
1559	{
1560	unsigned iPage = pRam->cb >> PAGE_SHIFT;
1561	while (iPage-- > 0)
1562	{
1563	if (PGM_PAGE_GET_HCPHYS(&pRam->aPages[iPage]) == HCPhys)
1564	{
1565	PPGMPOOL pPool = pVM->pgm.s.CTX_SUFF(pPool);
1566
1567	Assert(pShwPage->cPresent);
1568	Assert(pPool->cPresent);
1569	pShwPage->cPresent--;
1570	pPool->cPresent--;
1571
1572	pgmTrackDerefGCPhys(pPool, pShwPage, &pRam->aPages[iPage], iPte);
1573	STAM_PROFILE_STOP(&pVM->pgm.s.CTX_SUFF(pStats)->StatTrackDeref, a);
1574	return;
1575	}
1576	}
1577	}
1578
1579	for (;;)
1580	AssertReleaseMsgFailed(("HCPhys=%RHp wasn't found!\n", HCPhys));
1581	}
1582
1583
1584	/**
1585	* Update the tracking of shadowed pages.
1586	*
1587	* @param pVCpu The cross context virtual CPU structure.
1588	* @param pShwPage The shadow page.
1589	* @param u16 The top 16-bit of the pPage->HCPhys.
1590	* @param pPage Pointer to the guest page. this will be modified.
1591	* @param iPTDst The index into the shadow table.
1592	*/
1593	DECLINLINE(void) PGM_BTH_NAME(SyncPageWorkerTrackAddref)(PVMCPU pVCpu, PPGMPOOLPAGE pShwPage, uint16_t u16, PPGMPAGE pPage, const unsigned iPTDst)
1594	{
1595	PVM pVM = pVCpu->CTX_SUFF(pVM);
1596
1597	/*
1598	* Just deal with the simple first time here.
1599	*/
1600	if (!u16)
1601	{
1602	STAM_COUNTER_INC(&pVM->pgm.s.CTX_SUFF(pStats)->StatTrackVirgin);
1603	u16 = PGMPOOL_TD_MAKE(1, pShwPage->idx);
1604	/* Save the page table index. */
1605	PGM_PAGE_SET_PTE_INDEX(pVM, pPage, iPTDst);
1606	}
1607	else
1608	u16 = pgmPoolTrackPhysExtAddref(pVM, pPage, u16, pShwPage->idx, iPTDst);
1609
1610	/* write back */
1611	Log2(("SyncPageWorkerTrackAddRef: u16=%#x->%#x iPTDst=%#x\n", u16, PGM_PAGE_GET_TRACKING(pPage), iPTDst));
1612	PGM_PAGE_SET_TRACKING(pVM, pPage, u16);
1613
1614	/* update statistics. */
1615	pVM->pgm.s.CTX_SUFF(pPool)->cPresent++;
1616	pShwPage->cPresent++;
1617	if (pShwPage->iFirstPresent > iPTDst)
1618	pShwPage->iFirstPresent = iPTDst;
1619	}
1620
1621
1622	/**
1623	* Modifies a shadow PTE to account for access handlers.
1624	*
1625	* @param pVM The cross context VM structure.
1626	* @param pPage The page in question.
1627	* @param fPteSrc The shadowed flags of the source PTE. Must include the
1628	* A (accessed) bit so it can be emulated correctly.
1629	* @param pPteDst The shadow PTE (output). This is temporary storage and
1630	* does not need to be set atomically.
1631	*/
1632	DECLINLINE(void) PGM_BTH_NAME(SyncHandlerPte)(PVM pVM, PCPGMPAGE pPage, uint64_t fPteSrc, PSHWPTE pPteDst)
1633	{
1634	NOREF(pVM); RT_NOREF_PV(fPteSrc);
1635
1636	/** @todo r=bird: Are we actually handling dirty and access bits for pages with access handlers correctly? No.
1637	* Update: \#PF should deal with this before or after calling the handlers. It has all the info to do the job efficiently. */
1638	if (!PGM_PAGE_HAS_ACTIVE_ALL_HANDLERS(pPage))
1639	{
1640	LogFlow(("SyncHandlerPte: monitored page (%R[pgmpage]) -> mark read-only\n", pPage));
1641	#if PGM_SHW_TYPE == PGM_TYPE_EPT
1642	pPteDst->u = PGM_PAGE_GET_HCPHYS(pPage);
1643	pPteDst->n.u1Present = 1;
1644	pPteDst->n.u1Execute = 1;
1645	pPteDst->n.u1IgnorePAT = 1;
1646	pPteDst->n.u3EMT = VMX_EPT_MEMTYPE_WB;
1647	/* PteDst.n.u1Write = 0 && PteDst.n.u1Size = 0 */
1648	#else
1649	if (fPteSrc & X86_PTE_A)
1650	{
1651	SHW_PTE_SET(*pPteDst, fPteSrc \| PGM_PAGE_GET_HCPHYS(pPage));
1652	SHW_PTE_SET_RO(*pPteDst);
1653	}
1654	else
1655	SHW_PTE_SET(*pPteDst, 0);
1656	#endif
1657	}
1658	#ifdef PGM_WITH_MMIO_OPTIMIZATIONS
1659	# if PGM_SHW_TYPE == PGM_TYPE_EPT \|\| PGM_SHW_TYPE == PGM_TYPE_PAE \|\| PGM_SHW_TYPE == PGM_TYPE_AMD64
1660	else if ( PGM_PAGE_HAS_ACTIVE_ALL_HANDLERS(pPage)
1661	&& ( BTH_IS_NP_ACTIVE(pVM)
1662	\|\| (fPteSrc & (X86_PTE_RW \| X86_PTE_US)) == X86_PTE_RW) /** @todo Remove X86_PTE_US here and pGstWalk->Core.fEffectiveUS before the sync page test. */
1663	# if PGM_SHW_TYPE == PGM_TYPE_AMD64
1664	&& pVM->pgm.s.fLessThan52PhysicalAddressBits
1665	# endif
1666	)
1667	{
1668	LogFlow(("SyncHandlerPte: MMIO page -> invalid \n"));
1669	# if PGM_SHW_TYPE == PGM_TYPE_EPT
1670	/* 25.2.3.1: Reserved physical address bit -> EPT Misconfiguration (exit 49) */
1671	pPteDst->u = pVM->pgm.s.HCPhysInvMmioPg;
1672	/* 25.2.3.1: bits 2:0 = 010b -> EPT Misconfiguration (exit 49) */
1673	pPteDst->n.u1Present = 0;
1674	pPteDst->n.u1Write = 1;
1675	pPteDst->n.u1Execute = 0;
1676	/* 25.2.3.1: leaf && 2:0 != 0 && u3Emt in {2, 3, 7} -> EPT Misconfiguration */
1677	pPteDst->n.u3EMT = 7;
1678	# else
1679	/* Set high page frame bits that MBZ (bankers on PAE, CPU dependent on AMD64). */
1680	SHW_PTE_SET(*pPteDst, pVM->pgm.s.HCPhysInvMmioPg \| X86_PTE_PAE_MBZ_MASK_NO_NX \| X86_PTE_P);
1681	# endif
1682	}
1683	# endif
1684	#endif /* PGM_WITH_MMIO_OPTIMIZATIONS */
1685	else
1686	{
1687	LogFlow(("SyncHandlerPte: monitored page (%R[pgmpage]) -> mark not present\n", pPage));
1688	SHW_PTE_SET(*pPteDst, 0);
1689	}
1690	/** @todo count these kinds of entries. */
1691	}
1692
1693
1694	/**
1695	* Creates a 4K shadow page for a guest page.
1696	*
1697	* For 4M pages the caller must convert the PDE4M to a PTE, this includes adjusting the
1698	* physical address. The PdeSrc argument only the flags are used. No page
1699	* structured will be mapped in this function.
1700	*
1701	* @param pVCpu The cross context virtual CPU structure.
1702	* @param pPteDst Destination page table entry.
1703	* @param PdeSrc Source page directory entry (i.e. Guest OS page directory entry).
1704	* Can safely assume that only the flags are being used.
1705	* @param PteSrc Source page table entry (i.e. Guest OS page table entry).
1706	* @param pShwPage Pointer to the shadow page.
1707	* @param iPTDst The index into the shadow table.
1708	*
1709	* @remark Not used for 2/4MB pages!
1710	*/
1711	#if PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE) \|\| defined(DOXYGEN_RUNNING)
1712	static void PGM_BTH_NAME(SyncPageWorker)(PVMCPU pVCpu, PSHWPTE pPteDst, GSTPDE PdeSrc, GSTPTE PteSrc,
1713	PPGMPOOLPAGE pShwPage, unsigned iPTDst)
1714	#else
1715	static void PGM_BTH_NAME(SyncPageWorker)(PVMCPU pVCpu, PSHWPTE pPteDst, RTGCPHYS GCPhysPage,
1716	PPGMPOOLPAGE pShwPage, unsigned iPTDst)
1717	#endif
1718	{
1719	PVM pVM = pVCpu->CTX_SUFF(pVM);
1720	RTGCPHYS GCPhysOldPage = NIL_RTGCPHYS;
1721
1722	#if defined(PGMPOOL_WITH_OPTIMIZED_DIRTY_PT) \
1723	&& PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE) \
1724	&& (PGM_GST_TYPE == PGM_TYPE_PAE \|\| PGM_GST_TYPE == PGM_TYPE_AMD64 \|\| PGM_SHW_TYPE == PGM_TYPE_PAE /* pae/32bit combo */)
1725
1726	if (pShwPage->fDirty)
1727	{
1728	PPGMPOOL pPool = pVM->pgm.s.CTX_SUFF(pPool);
1729	PGSTPT pGstPT;
1730
1731	/* Note that iPTDst can be used to index the guest PT even in the pae/32bit combo as we copy only half the table; see pgmPoolAddDirtyPage. */
1732	pGstPT = (PGSTPT)&pPool->aDirtyPages[pShwPage->idxDirtyEntry].aPage[0];
1733	GCPhysOldPage = GST_GET_PTE_GCPHYS(pGstPT->a[iPTDst]);
1734	pGstPT->a[iPTDst].u = PteSrc.u;
1735	}
1736	#else
1737	Assert(!pShwPage->fDirty);
1738	#endif
1739
1740	#if PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE)
1741	if ( PteSrc.n.u1Present
1742	&& GST_IS_PTE_VALID(pVCpu, PteSrc))
1743	#endif
1744	{
1745	# if PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE)
1746	RTGCPHYS GCPhysPage = GST_GET_PTE_GCPHYS(PteSrc);
1747	# endif
1748	PGM_A20_ASSERT_MASKED(pVCpu, GCPhysPage);
1749
1750	/*
1751	* Find the ram range.
1752	*/
1753	PPGMPAGE pPage;
1754	int rc = pgmPhysGetPageEx(pVM, GCPhysPage, &pPage);
1755	if (RT_SUCCESS(rc))
1756	{
1757	/* Ignore ballooned pages.
1758	Don't return errors or use a fatal assert here as part of a
1759	shadow sync range might included ballooned pages. */
1760	if (PGM_PAGE_IS_BALLOONED(pPage))
1761	{
1762	Assert(!SHW_PTE_IS_P(pPteDst)); /* @todo user tracking needs updating if this triggers. */
1763	return;
1764	}
1765
1766	#ifndef VBOX_WITH_NEW_LAZY_PAGE_ALLOC
1767	/* Make the page writable if necessary. */
1768	if ( PGM_PAGE_GET_TYPE(pPage) == PGMPAGETYPE_RAM
1769	&& ( PGM_PAGE_IS_ZERO(pPage)
1770	# if PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE)
1771	\|\| ( PteSrc.n.u1Write
1772	# else
1773	\|\| ( 1
1774	# endif
1775	&& PGM_PAGE_GET_STATE(pPage) != PGM_PAGE_STATE_ALLOCATED
1776	# ifdef VBOX_WITH_REAL_WRITE_MONITORED_PAGES
1777	&& PGM_PAGE_GET_STATE(pPage) != PGM_PAGE_STATE_WRITE_MONITORED
1778	# endif
1779	# ifdef VBOX_WITH_PAGE_SHARING
1780	&& PGM_PAGE_GET_STATE(pPage) != PGM_PAGE_STATE_SHARED
1781	# endif
1782	)
1783	)
1784	)
1785	{
1786	rc = pgmPhysPageMakeWritable(pVM, pPage, GCPhysPage);
1787	AssertRC(rc);
1788	}
1789	#endif
1790
1791	/*
1792	* Make page table entry.
1793	*/
1794	SHWPTE PteDst;
1795	# if PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE)
1796	uint64_t fGstShwPteFlags = GST_GET_PTE_SHW_FLAGS(pVCpu, PteSrc);
1797	# else
1798	uint64_t fGstShwPteFlags = X86_PTE_P \| X86_PTE_RW \| X86_PTE_US \| X86_PTE_A \| X86_PTE_D;
1799	# endif
1800	if (PGM_PAGE_HAS_ACTIVE_HANDLERS(pPage))
1801	PGM_BTH_NAME(SyncHandlerPte)(pVM, pPage, fGstShwPteFlags, &PteDst);
1802	else
1803	{
1804	#if PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE)
1805	/*
1806	* If the page or page directory entry is not marked accessed,
1807	* we mark the page not present.
1808	*/
1809	if (!PteSrc.n.u1Accessed \|\| !PdeSrc.n.u1Accessed)
1810	{
1811	LogFlow(("SyncPageWorker: page and or page directory not accessed -> mark not present\n"));
1812	STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->CTX_MID_Z(Stat,AccessedPage));
1813	SHW_PTE_SET(PteDst, 0);
1814	}
1815	/*
1816	* If the page is not flagged as dirty and is writable, then make it read-only, so we can set the dirty bit
1817	* when the page is modified.
1818	*/
1819	else if (!PteSrc.n.u1Dirty && (PdeSrc.n.u1Write & PteSrc.n.u1Write))
1820	{
1821	STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->CTX_MID_Z(Stat,DirtyPage));
1822	SHW_PTE_SET(PteDst,
1823	fGstShwPteFlags
1824	\| PGM_PAGE_GET_HCPHYS(pPage)
1825	\| PGM_PTFLAGS_TRACK_DIRTY);
1826	SHW_PTE_SET_RO(PteDst);
1827	}
1828	else
1829	#endif
1830	{
1831	STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->CTX_MID_Z(Stat,DirtyPageSkipped));
1832	#if PGM_SHW_TYPE == PGM_TYPE_EPT
1833	PteDst.u = PGM_PAGE_GET_HCPHYS(pPage);
1834	PteDst.n.u1Present = 1;
1835	PteDst.n.u1Write = 1;
1836	PteDst.n.u1Execute = 1;
1837	PteDst.n.u1IgnorePAT = 1;
1838	PteDst.n.u3EMT = VMX_EPT_MEMTYPE_WB;
1839	/* PteDst.n.u1Size = 0 */
1840	#else
1841	SHW_PTE_SET(PteDst, fGstShwPteFlags \| PGM_PAGE_GET_HCPHYS(pPage));
1842	#endif
1843	}
1844
1845	/*
1846	* Make sure only allocated pages are mapped writable.
1847	*/
1848	if ( SHW_PTE_IS_P_RW(PteDst)
1849	&& PGM_PAGE_GET_STATE(pPage) != PGM_PAGE_STATE_ALLOCATED)
1850	{
1851	/* Still applies to shared pages. */
1852	Assert(!PGM_PAGE_IS_ZERO(pPage));
1853	SHW_PTE_SET_RO(PteDst); /** @todo this isn't quite working yet. Why, isn't it? */
1854	Log3(("SyncPageWorker: write-protecting %RGp pPage=%R[pgmpage]at iPTDst=%d\n", GCPhysPage, pPage, iPTDst));
1855	}
1856	}
1857
1858	/*
1859	* Keep user track up to date.
1860	*/
1861	if (SHW_PTE_IS_P(PteDst))
1862	{
1863	if (!SHW_PTE_IS_P(*pPteDst))
1864	PGM_BTH_NAME(SyncPageWorkerTrackAddref)(pVCpu, pShwPage, PGM_PAGE_GET_TRACKING(pPage), pPage, iPTDst);
1865	else if (SHW_PTE_GET_HCPHYS(*pPteDst) != SHW_PTE_GET_HCPHYS(PteDst))
1866	{
1867	Log2(("SyncPageWorker: deref! pPteDst=%RX64 PteDst=%RX64\n", SHW_PTE_LOG64(pPteDst), SHW_PTE_LOG64(PteDst)));
1868	PGM_BTH_NAME(SyncPageWorkerTrackDeref)(pVCpu, pShwPage, SHW_PTE_GET_HCPHYS(*pPteDst), iPTDst, GCPhysOldPage);
1869	PGM_BTH_NAME(SyncPageWorkerTrackAddref)(pVCpu, pShwPage, PGM_PAGE_GET_TRACKING(pPage), pPage, iPTDst);
1870	}
1871	}
1872	else if (SHW_PTE_IS_P(*pPteDst))
1873	{
1874	Log2(("SyncPageWorker: deref! pPteDst=%RX64\n", SHW_PTE_LOG64(pPteDst)));
1875	PGM_BTH_NAME(SyncPageWorkerTrackDeref)(pVCpu, pShwPage, SHW_PTE_GET_HCPHYS(*pPteDst), iPTDst, GCPhysOldPage);
1876	}
1877
1878	/*
1879	* Update statistics and commit the entry.
1880	*/
1881	#if PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE)
1882	if (!PteSrc.n.u1Global)
1883	pShwPage->fSeenNonGlobal = true;
1884	#endif
1885	SHW_PTE_ATOMIC_SET2(*pPteDst, PteDst);
1886	return;
1887	}
1888
1889	/** @todo count these three different kinds. */
1890	Log2(("SyncPageWorker: invalid address in Pte\n"));
1891	}
1892	#if PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE)
1893	else if (!PteSrc.n.u1Present)
1894	Log2(("SyncPageWorker: page not present in Pte\n"));
1895	else
1896	Log2(("SyncPageWorker: invalid Pte\n"));
1897	#endif
1898
1899	/*
1900	* The page is not present or the PTE is bad. Replace the shadow PTE by
1901	* an empty entry, making sure to keep the user tracking up to date.
1902	*/
1903	if (SHW_PTE_IS_P(*pPteDst))
1904	{
1905	Log2(("SyncPageWorker: deref! pPteDst=%RX64\n", SHW_PTE_LOG64(pPteDst)));
1906	PGM_BTH_NAME(SyncPageWorkerTrackDeref)(pVCpu, pShwPage, SHW_PTE_GET_HCPHYS(*pPteDst), iPTDst, GCPhysOldPage);
1907	}
1908	SHW_PTE_ATOMIC_SET(*pPteDst, 0);
1909	}
1910
1911
1912	/**
1913	* Syncs a guest OS page.
1914	*
1915	* There are no conflicts at this point, neither is there any need for
1916	* page table allocations.
1917	*
1918	* When called in PAE or AMD64 guest mode, the guest PDPE shall be valid.
1919	* When called in AMD64 guest mode, the guest PML4E shall be valid.
1920	*
1921	* @returns VBox status code.
1922	* @returns VINF_PGM_SYNCPAGE_MODIFIED_PDE if it modifies the PDE in any way.
1923	* @param pVCpu The cross context virtual CPU structure.
1924	* @param PdeSrc Page directory entry of the guest.
1925	* @param GCPtrPage Guest context page address.
1926	* @param cPages Number of pages to sync (PGM_SYNC_N_PAGES) (default=1).
1927	* @param uErr Fault error (X86_TRAP_PF_*).
1928	*/
1929	static int PGM_BTH_NAME(SyncPage)(PVMCPU pVCpu, GSTPDE PdeSrc, RTGCPTR GCPtrPage, unsigned cPages, unsigned uErr)
1930	{
1931	PVM pVM = pVCpu->CTX_SUFF(pVM);
1932	PPGMPOOL pPool = pVM->pgm.s.CTX_SUFF(pPool); NOREF(pPool);
1933	LogFlow(("SyncPage: GCPtrPage=%RGv cPages=%u uErr=%#x\n", GCPtrPage, cPages, uErr));
1934	RT_NOREF_PV(uErr); RT_NOREF_PV(cPages); RT_NOREF_PV(GCPtrPage);
1935
1936	PGM_LOCK_ASSERT_OWNER(pVM);
1937
1938	#if ( PGM_GST_TYPE == PGM_TYPE_32BIT \
1939	\|\| PGM_GST_TYPE == PGM_TYPE_PAE \
1940	\|\| PGM_GST_TYPE == PGM_TYPE_AMD64) \
1941	&& PGM_SHW_TYPE != PGM_TYPE_NESTED \
1942	&& PGM_SHW_TYPE != PGM_TYPE_EPT
1943
1944	/*
1945	* Assert preconditions.
1946	*/
1947	Assert(PdeSrc.n.u1Present);
1948	Assert(cPages);
1949	# if 0 /* rarely useful; leave for debugging. */
1950	STAM_COUNTER_INC(&pVCpu->pgm.s.StatSyncPagePD[(GCPtrPage >> GST_PD_SHIFT) & GST_PD_MASK]);
1951	# endif
1952
1953	/*
1954	* Get the shadow PDE, find the shadow page table in the pool.
1955	*/
1956	# if PGM_SHW_TYPE == PGM_TYPE_32BIT
1957	const unsigned iPDDst = (GCPtrPage >> SHW_PD_SHIFT) & SHW_PD_MASK;
1958	PX86PDE pPdeDst = pgmShwGet32BitPDEPtr(pVCpu, GCPtrPage);
1959
1960	/* Fetch the pgm pool shadow descriptor. */
1961	PPGMPOOLPAGE pShwPde = pVCpu->pgm.s.CTX_SUFF(pShwPageCR3);
1962	Assert(pShwPde);
1963
1964	# elif PGM_SHW_TYPE == PGM_TYPE_PAE
1965	const unsigned iPDDst = (GCPtrPage >> SHW_PD_SHIFT) & SHW_PD_MASK;
1966	PPGMPOOLPAGE pShwPde = NULL;
1967	PX86PDPAE pPDDst;
1968
1969	/* Fetch the pgm pool shadow descriptor. */
1970	int rc2 = pgmShwGetPaePoolPagePD(pVCpu, GCPtrPage, &pShwPde);
1971	AssertRCSuccessReturn(rc2, rc2);
1972	Assert(pShwPde);
1973
1974	pPDDst = (PX86PDPAE)PGMPOOL_PAGE_2_PTR_V2(pVM, pVCpu, pShwPde);
1975	PX86PDEPAE pPdeDst = &pPDDst->a[iPDDst];
1976
1977	# elif PGM_SHW_TYPE == PGM_TYPE_AMD64
1978	const unsigned iPDDst = (GCPtrPage >> SHW_PD_SHIFT) & SHW_PD_MASK;
1979	const unsigned iPdpt = (GCPtrPage >> X86_PDPT_SHIFT) & X86_PDPT_MASK_AMD64;
1980	PX86PDPAE pPDDst = NULL; /* initialized to shut up gcc */
1981	PX86PDPT pPdptDst = NULL; /* initialized to shut up gcc */
1982
1983	int rc2 = pgmShwGetLongModePDPtr(pVCpu, GCPtrPage, NULL, &pPdptDst, &pPDDst);
1984	AssertRCSuccessReturn(rc2, rc2);
1985	Assert(pPDDst && pPdptDst);
1986	PX86PDEPAE pPdeDst = &pPDDst->a[iPDDst];
1987	# endif
1988	SHWPDE PdeDst = *pPdeDst;
1989
1990	/*
1991	* - In the guest SMP case we could have blocked while another VCPU reused
1992	* this page table.
1993	* - With W7-64 we may also take this path when the A bit is cleared on
1994	* higher level tables (PDPE/PML4E). The guest does not invalidate the
1995	* relevant TLB entries. If we're write monitoring any page mapped by
1996	* the modified entry, we may end up here with a "stale" TLB entry.
1997	*/
1998	if (!PdeDst.n.u1Present)
1999	{
2000	Log(("CPU%u: SyncPage: Pde at %RGv changed behind our back? (pPdeDst=%p/%RX64) uErr=%#x\n", pVCpu->idCpu, GCPtrPage, pPdeDst, (uint64_t)PdeDst.u, (uint32_t)uErr));
2001	AssertMsg(pVM->cCpus > 1 \|\| (uErr & (X86_TRAP_PF_P \| X86_TRAP_PF_RW)) == (X86_TRAP_PF_P \| X86_TRAP_PF_RW),
2002	("Unexpected missing PDE p=%p/%RX64 uErr=%#x\n", pPdeDst, (uint64_t)PdeDst.u, (uint32_t)uErr));
2003	if (uErr & X86_TRAP_PF_P)
2004	PGM_INVL_PG(pVCpu, GCPtrPage);
2005	return VINF_SUCCESS; /* force the instruction to be executed again. */
2006	}
2007
2008	PPGMPOOLPAGE pShwPage = pgmPoolGetPage(pPool, PdeDst.u & SHW_PDE_PG_MASK);
2009	Assert(pShwPage);
2010
2011	# if PGM_GST_TYPE == PGM_TYPE_AMD64
2012	/* Fetch the pgm pool shadow descriptor. */
2013	PPGMPOOLPAGE pShwPde = pgmPoolGetPage(pPool, pPdptDst->a[iPdpt].u & X86_PDPE_PG_MASK);
2014	Assert(pShwPde);
2015	# endif
2016
2017	/*
2018	* Check that the page is present and that the shadow PDE isn't out of sync.
2019	*/
2020	const bool fBigPage = PdeSrc.b.u1Size && GST_IS_PSE_ACTIVE(pVCpu);
2021	const bool fPdeValid = !fBigPage ? GST_IS_PDE_VALID(pVCpu, PdeSrc) : GST_IS_BIG_PDE_VALID(pVCpu, PdeSrc);
2022	RTGCPHYS GCPhys;
2023	if (!fBigPage)
2024	{
2025	GCPhys = GST_GET_PDE_GCPHYS(PdeSrc);
2026	# if PGM_SHW_TYPE == PGM_TYPE_PAE && PGM_GST_TYPE == PGM_TYPE_32BIT
2027	/* Select the right PDE as we're emulating a 4kb page table with 2 shadow page tables. */
2028	GCPhys = PGM_A20_APPLY(pVCpu, GCPhys \| ((iPDDst & 1) * (PAGE_SIZE / 2)));
2029	# endif
2030	}
2031	else
2032	{
2033	GCPhys = GST_GET_BIG_PDE_GCPHYS(pVM, PdeSrc);
2034	# if PGM_SHW_TYPE == PGM_TYPE_PAE && PGM_GST_TYPE == PGM_TYPE_32BIT
2035	/* Select the right PDE as we're emulating a 4MB page directory with two 2 MB shadow PDEs.*/
2036	GCPhys = PGM_A20_APPLY(pVCpu, GCPhys \| (GCPtrPage & (1 << X86_PD_PAE_SHIFT)));
2037	# endif
2038	}
2039	/** @todo This doesn't check the G bit of 2/4MB pages. FIXME */
2040	if ( fPdeValid
2041	&& pShwPage->GCPhys == GCPhys
2042	&& PdeSrc.n.u1Present
2043	&& PdeSrc.n.u1User == PdeDst.n.u1User
2044	&& (PdeSrc.n.u1Write == PdeDst.n.u1Write \|\| !PdeDst.n.u1Write)
2045	# if PGM_WITH_NX(PGM_GST_TYPE, PGM_SHW_TYPE)
2046	&& (PdeSrc.n.u1NoExecute == PdeDst.n.u1NoExecute \|\| !GST_IS_NX_ACTIVE(pVCpu))
2047	# endif
2048	)
2049	{
2050	/*
2051	* Check that the PDE is marked accessed already.
2052	* Since we set the accessed bit before getting here on a #PF, this
2053	* check is only meant for dealing with non-#PF'ing paths.
2054	*/
2055	if (PdeSrc.n.u1Accessed)
2056	{
2057	PSHWPT pPTDst = (PSHWPT)PGMPOOL_PAGE_2_PTR_V2(pVM, pVCpu, pShwPage);
2058	if (!fBigPage)
2059	{
2060	/*
2061	* 4KB Page - Map the guest page table.
2062	*/
2063	PGSTPT pPTSrc;
2064	int rc = PGM_GCPHYS_2_PTR_V2(pVM, pVCpu, GST_GET_PDE_GCPHYS(PdeSrc), &pPTSrc);
2065	if (RT_SUCCESS(rc))
2066	{
2067	# ifdef PGM_SYNC_N_PAGES
2068	Assert(cPages == 1 \|\| !(uErr & X86_TRAP_PF_P));
2069	if ( cPages > 1
2070	&& !(uErr & X86_TRAP_PF_P)
2071	&& !VM_FF_IS_PENDING(pVM, VM_FF_PGM_NO_MEMORY))
2072	{
2073	/*
2074	* This code path is currently only taken when the caller is PGMTrap0eHandler
2075	* for non-present pages!
2076	*
2077	* We're setting PGM_SYNC_NR_PAGES pages around the faulting page to sync it and
2078	* deal with locality.
2079	*/
2080	unsigned iPTDst = (GCPtrPage >> SHW_PT_SHIFT) & SHW_PT_MASK;
2081	# if PGM_SHW_TYPE == PGM_TYPE_PAE && PGM_GST_TYPE == PGM_TYPE_32BIT
2082	/* Select the right PDE as we're emulating a 4kb page table with 2 shadow page tables. */
2083	const unsigned offPTSrc = ((GCPtrPage >> SHW_PD_SHIFT) & 1) * 512;
2084	# else
2085	const unsigned offPTSrc = 0;
2086	# endif
2087	const unsigned iPTDstEnd = RT_MIN(iPTDst + PGM_SYNC_NR_PAGES / 2, RT_ELEMENTS(pPTDst->a));
2088	if (iPTDst < PGM_SYNC_NR_PAGES / 2)
2089	iPTDst = 0;
2090	else
2091	iPTDst -= PGM_SYNC_NR_PAGES / 2;
2092
2093	for (; iPTDst < iPTDstEnd; iPTDst++)
2094	{
2095	const PGSTPTE pPteSrc = &pPTSrc->a[offPTSrc + iPTDst];
2096
2097	if ( pPteSrc->n.u1Present
2098	&& !SHW_PTE_IS_P(pPTDst->a[iPTDst]))
2099	{
2100	RTGCPTR GCPtrCurPage = (GCPtrPage & ~(RTGCPTR)(GST_PT_MASK << GST_PT_SHIFT)) \| ((offPTSrc + iPTDst) << PAGE_SHIFT);
2101	NOREF(GCPtrCurPage);
2102	# ifdef VBOX_WITH_RAW_MODE_NOT_R0
2103	/*
2104	* Assuming kernel code will be marked as supervisor - and not as user level
2105	* and executed using a conforming code selector - And marked as readonly.
2106	* Also assume that if we're monitoring a page, it's of no interest to CSAM.
2107	*/
2108	PPGMPAGE pPage;
2109	if ( ((PdeSrc.u & pPteSrc->u) & (X86_PTE_RW \| X86_PTE_US))
2110	\|\| iPTDst == ((GCPtrPage >> SHW_PT_SHIFT) & SHW_PT_MASK) /* always sync GCPtrPage */
2111	\|\| !CSAMDoesPageNeedScanning(pVM, GCPtrCurPage)
2112	\|\| ( (pPage = pgmPhysGetPage(pVM, pPteSrc->u & GST_PTE_PG_MASK))
2113	&& PGM_PAGE_HAS_ACTIVE_HANDLERS(pPage))
2114	)
2115	# endif /* else: CSAM not active */
2116	PGM_BTH_NAME(SyncPageWorker)(pVCpu, &pPTDst->a[iPTDst], PdeSrc, *pPteSrc, pShwPage, iPTDst);
2117	Log2(("SyncPage: 4K+ %RGv PteSrc:{P=%d RW=%d U=%d raw=%08llx} PteDst=%08llx%s\n",
2118	GCPtrCurPage, pPteSrc->n.u1Present,
2119	pPteSrc->n.u1Write & PdeSrc.n.u1Write,
2120	pPteSrc->n.u1User & PdeSrc.n.u1User,
2121	(uint64_t)pPteSrc->u,
2122	SHW_PTE_LOG64(pPTDst->a[iPTDst]),
2123	SHW_PTE_IS_TRACK_DIRTY(pPTDst->a[iPTDst]) ? " Track-Dirty" : ""));
2124	}
2125	}
2126	}
2127	else
2128	# endif /* PGM_SYNC_N_PAGES */
2129	{
2130	const unsigned iPTSrc = (GCPtrPage >> GST_PT_SHIFT) & GST_PT_MASK;
2131	GSTPTE PteSrc = pPTSrc->a[iPTSrc];
2132	const unsigned iPTDst = (GCPtrPage >> SHW_PT_SHIFT) & SHW_PT_MASK;
2133	PGM_BTH_NAME(SyncPageWorker)(pVCpu, &pPTDst->a[iPTDst], PdeSrc, PteSrc, pShwPage, iPTDst);
2134	Log2(("SyncPage: 4K %RGv PteSrc:{P=%d RW=%d U=%d raw=%08llx} PteDst=%08llx %s\n",
2135	GCPtrPage, PteSrc.n.u1Present,
2136	PteSrc.n.u1Write & PdeSrc.n.u1Write,
2137	PteSrc.n.u1User & PdeSrc.n.u1User,
2138	(uint64_t)PteSrc.u,
2139	SHW_PTE_LOG64(pPTDst->a[iPTDst]),
2140	SHW_PTE_IS_TRACK_DIRTY(pPTDst->a[iPTDst]) ? " Track-Dirty" : ""));
2141	}
2142	}
2143	else /* MMIO or invalid page: emulated in #PF handler. */
2144	{
2145	LogFlow(("PGM_GCPHYS_2_PTR %RGp failed with %Rrc\n", GCPhys, rc));
2146	Assert(!SHW_PTE_IS_P(pPTDst->a[(GCPtrPage >> SHW_PT_SHIFT) & SHW_PT_MASK]));
2147	}
2148	}
2149	else
2150	{
2151	/*
2152	* 4/2MB page - lazy syncing shadow 4K pages.
2153	* (There are many causes of getting here, it's no longer only CSAM.)
2154	*/
2155	/* Calculate the GC physical address of this 4KB shadow page. */
2156	GCPhys = PGM_A20_APPLY(pVCpu, GST_GET_BIG_PDE_GCPHYS(pVM, PdeSrc) \| (GCPtrPage & GST_BIG_PAGE_OFFSET_MASK));
2157	/* Find ram range. */
2158	PPGMPAGE pPage;
2159	int rc = pgmPhysGetPageEx(pVM, GCPhys, &pPage);
2160	if (RT_SUCCESS(rc))
2161	{
2162	AssertFatalMsg(!PGM_PAGE_IS_BALLOONED(pPage), ("Unexpected ballooned page at %RGp\n", GCPhys));
2163
2164	# ifndef VBOX_WITH_NEW_LAZY_PAGE_ALLOC
2165	/* Try to make the page writable if necessary. */
2166	if ( PGM_PAGE_GET_TYPE(pPage) == PGMPAGETYPE_RAM
2167	&& ( PGM_PAGE_IS_ZERO(pPage)
2168	\|\| ( PdeSrc.n.u1Write
2169	&& PGM_PAGE_GET_STATE(pPage) != PGM_PAGE_STATE_ALLOCATED
2170	# ifdef VBOX_WITH_REAL_WRITE_MONITORED_PAGES
2171	&& PGM_PAGE_GET_STATE(pPage) != PGM_PAGE_STATE_WRITE_MONITORED
2172	# endif
2173	# ifdef VBOX_WITH_PAGE_SHARING
2174	&& PGM_PAGE_GET_STATE(pPage) != PGM_PAGE_STATE_SHARED
2175	# endif
2176	)
2177	)
2178	)
2179	{
2180	rc = pgmPhysPageMakeWritable(pVM, pPage, GCPhys);
2181	AssertRC(rc);
2182	}
2183	# endif
2184
2185	/*
2186	* Make shadow PTE entry.
2187	*/
2188	SHWPTE PteDst;
2189	if (PGM_PAGE_HAS_ACTIVE_HANDLERS(pPage))
2190	PGM_BTH_NAME(SyncHandlerPte)(pVM, pPage, GST_GET_BIG_PDE_SHW_FLAGS_4_PTE(pVCpu, PdeSrc), &PteDst);
2191	else
2192	SHW_PTE_SET(PteDst, GST_GET_BIG_PDE_SHW_FLAGS_4_PTE(pVCpu, PdeSrc) \| PGM_PAGE_GET_HCPHYS(pPage));
2193
2194	const unsigned iPTDst = (GCPtrPage >> SHW_PT_SHIFT) & SHW_PT_MASK;
2195	if ( SHW_PTE_IS_P(PteDst)
2196	&& !SHW_PTE_IS_P(pPTDst->a[iPTDst]))
2197	PGM_BTH_NAME(SyncPageWorkerTrackAddref)(pVCpu, pShwPage, PGM_PAGE_GET_TRACKING(pPage), pPage, iPTDst);
2198
2199	/* Make sure only allocated pages are mapped writable. */
2200	if ( SHW_PTE_IS_P_RW(PteDst)
2201	&& PGM_PAGE_GET_STATE(pPage) != PGM_PAGE_STATE_ALLOCATED)
2202	{
2203	/* Still applies to shared pages. */
2204	Assert(!PGM_PAGE_IS_ZERO(pPage));
2205	SHW_PTE_SET_RO(PteDst); /** @todo this isn't quite working yet... */
2206	Log3(("SyncPage: write-protecting %RGp pPage=%R[pgmpage] at %RGv\n", GCPhys, pPage, GCPtrPage));
2207	}
2208
2209	SHW_PTE_ATOMIC_SET2(pPTDst->a[iPTDst], PteDst);
2210
2211	/*
2212	* If the page is not flagged as dirty and is writable, then make it read-only
2213	* at PD level, so we can set the dirty bit when the page is modified.
2214	*
2215	* ASSUMES that page access handlers are implemented on page table entry level.
2216	* Thus we will first catch the dirty access and set PDE.D and restart. If
2217	* there is an access handler, we'll trap again and let it work on the problem.
2218	*/
2219	/** @todo r=bird: figure out why we need this here, SyncPT should've taken care of this already.
2220	* As for invlpg, it simply frees the whole shadow PT.
2221	* ...It's possibly because the guest clears it and the guest doesn't really tell us... */
2222	if ( !PdeSrc.b.u1Dirty
2223	&& PdeSrc.b.u1Write)
2224	{
2225	STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->CTX_MID_Z(Stat,DirtyPageBig));
2226	PdeDst.u \|= PGM_PDFLAGS_TRACK_DIRTY;
2227	PdeDst.n.u1Write = 0;
2228	}
2229	else
2230	{
2231	PdeDst.au32[0] &= ~PGM_PDFLAGS_TRACK_DIRTY;
2232	PdeDst.n.u1Write = PdeSrc.n.u1Write;
2233	}
2234	ASMAtomicWriteSize(pPdeDst, PdeDst.u);
2235	Log2(("SyncPage: BIG %RGv PdeSrc:{P=%d RW=%d U=%d raw=%08llx} GCPhys=%RGp%s\n",
2236	GCPtrPage, PdeSrc.n.u1Present, PdeSrc.n.u1Write, PdeSrc.n.u1User, (uint64_t)PdeSrc.u, GCPhys,
2237	PdeDst.u & PGM_PDFLAGS_TRACK_DIRTY ? " Track-Dirty" : ""));
2238	}
2239	else
2240	{
2241	LogFlow(("PGM_GCPHYS_2_PTR %RGp (big) failed with %Rrc\n", GCPhys, rc));
2242	/** @todo must wipe the shadow page table entry in this
2243	* case. */
2244	}
2245	}
2246	PGM_DYNMAP_UNUSED_HINT(pVCpu, pPdeDst);
2247	return VINF_SUCCESS;
2248	}
2249
2250	STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->CTX_MID_Z(Stat,SyncPagePDNAs));
2251	}
2252	else if (fPdeValid)
2253	{
2254	STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->CTX_MID_Z(Stat,SyncPagePDOutOfSync));
2255	Log2(("SyncPage: Out-Of-Sync PDE at %RGp PdeSrc=%RX64 PdeDst=%RX64 (GCPhys %RGp vs %RGp)\n",
2256	GCPtrPage, (uint64_t)PdeSrc.u, (uint64_t)PdeDst.u, pShwPage->GCPhys, GCPhys));
2257	}
2258	else
2259	{
2260	/// @todo STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_MID_Z(Stat,SyncPagePDOutOfSyncAndInvalid));
2261	Log2(("SyncPage: Bad PDE at %RGp PdeSrc=%RX64 PdeDst=%RX64 (GCPhys %RGp vs %RGp)\n",
2262	GCPtrPage, (uint64_t)PdeSrc.u, (uint64_t)PdeDst.u, pShwPage->GCPhys, GCPhys));
2263	}
2264
2265	/*
2266	* Mark the PDE not present. Restart the instruction and let #PF call SyncPT.
2267	* Yea, I'm lazy.
2268	*/
2269	pgmPoolFreeByPage(pPool, pShwPage, pShwPde->idx, iPDDst);
2270	ASMAtomicWriteSize(pPdeDst, 0);
2271
2272	PGM_DYNMAP_UNUSED_HINT(pVCpu, pPdeDst);
2273	PGM_INVL_VCPU_TLBS(pVCpu);
2274	return VINF_PGM_SYNCPAGE_MODIFIED_PDE;
2275
2276
2277	#elif (PGM_GST_TYPE == PGM_TYPE_REAL \|\| PGM_GST_TYPE == PGM_TYPE_PROT) \
2278	&& PGM_SHW_TYPE != PGM_TYPE_NESTED \
2279	&& (PGM_SHW_TYPE != PGM_TYPE_EPT \|\| PGM_GST_TYPE == PGM_TYPE_PROT) \
2280	&& !defined(IN_RC)
2281	NOREF(PdeSrc);
2282
2283	# ifdef PGM_SYNC_N_PAGES
2284	/*
2285	* Get the shadow PDE, find the shadow page table in the pool.
2286	*/
2287	# if PGM_SHW_TYPE == PGM_TYPE_32BIT
2288	X86PDE PdeDst = pgmShwGet32BitPDE(pVCpu, GCPtrPage);
2289
2290	# elif PGM_SHW_TYPE == PGM_TYPE_PAE
2291	X86PDEPAE PdeDst = pgmShwGetPaePDE(pVCpu, GCPtrPage);
2292
2293	# elif PGM_SHW_TYPE == PGM_TYPE_AMD64
2294	const unsigned iPDDst = ((GCPtrPage >> SHW_PD_SHIFT) & SHW_PD_MASK);
2295	const unsigned iPdpt = (GCPtrPage >> X86_PDPT_SHIFT) & X86_PDPT_MASK_AMD64; NOREF(iPdpt);
2296	PX86PDPAE pPDDst = NULL; /* initialized to shut up gcc */
2297	X86PDEPAE PdeDst;
2298	PX86PDPT pPdptDst = NULL; /* initialized to shut up gcc */
2299
2300	int rc = pgmShwGetLongModePDPtr(pVCpu, GCPtrPage, NULL, &pPdptDst, &pPDDst);
2301	AssertRCSuccessReturn(rc, rc);
2302	Assert(pPDDst && pPdptDst);
2303	PdeDst = pPDDst->a[iPDDst];
2304	# elif PGM_SHW_TYPE == PGM_TYPE_EPT
2305	const unsigned iPDDst = ((GCPtrPage >> SHW_PD_SHIFT) & SHW_PD_MASK);
2306	PEPTPD pPDDst;
2307	EPTPDE PdeDst;
2308
2309	int rc = pgmShwGetEPTPDPtr(pVCpu, GCPtrPage, NULL, &pPDDst);
2310	if (rc != VINF_SUCCESS)
2311	{
2312	AssertRC(rc);
2313	return rc;
2314	}
2315	Assert(pPDDst);
2316	PdeDst = pPDDst->a[iPDDst];
2317	# endif
2318	/* In the guest SMP case we could have blocked while another VCPU reused this page table. */
2319	if (!PdeDst.n.u1Present)
2320	{
2321	AssertMsg(pVM->cCpus > 1, ("Unexpected missing PDE %RX64\n", (uint64_t)PdeDst.u));
2322	Log(("CPU%d: SyncPage: Pde at %RGv changed behind our back!\n", pVCpu->idCpu, GCPtrPage));
2323	return VINF_SUCCESS; /* force the instruction to be executed again. */
2324	}
2325
2326	/* Can happen in the guest SMP case; other VCPU activated this PDE while we were blocking to handle the page fault. */
2327	if (PdeDst.n.u1Size)
2328	{
2329	Assert(pVM->pgm.s.fNestedPaging);
2330	Log(("CPU%d: SyncPage: Pde (big:%RX64) at %RGv changed behind our back!\n", pVCpu->idCpu, PdeDst.u, GCPtrPage));
2331	return VINF_SUCCESS;
2332	}
2333
2334	/* Mask away the page offset. */
2335	GCPtrPage &= ~((RTGCPTR)0xfff);
2336
2337	PPGMPOOLPAGE pShwPage = pgmPoolGetPage(pPool, PdeDst.u & SHW_PDE_PG_MASK);
2338	PSHWPT pPTDst = (PSHWPT)PGMPOOL_PAGE_2_PTR_V2(pVM, pVCpu, pShwPage);
2339
2340	Assert(cPages == 1 \|\| !(uErr & X86_TRAP_PF_P));
2341	if ( cPages > 1
2342	&& !(uErr & X86_TRAP_PF_P)
2343	&& !VM_FF_IS_PENDING(pVM, VM_FF_PGM_NO_MEMORY))
2344	{
2345	/*
2346	* This code path is currently only taken when the caller is PGMTrap0eHandler
2347	* for non-present pages!
2348	*
2349	* We're setting PGM_SYNC_NR_PAGES pages around the faulting page to sync it and
2350	* deal with locality.
2351	*/
2352	unsigned iPTDst = (GCPtrPage >> SHW_PT_SHIFT) & SHW_PT_MASK;
2353	const unsigned iPTDstEnd = RT_MIN(iPTDst + PGM_SYNC_NR_PAGES / 2, RT_ELEMENTS(pPTDst->a));
2354	if (iPTDst < PGM_SYNC_NR_PAGES / 2)
2355	iPTDst = 0;
2356	else
2357	iPTDst -= PGM_SYNC_NR_PAGES / 2;
2358	for (; iPTDst < iPTDstEnd; iPTDst++)
2359	{
2360	if (!SHW_PTE_IS_P(pPTDst->a[iPTDst]))
2361	{
2362	RTGCPTR GCPtrCurPage = PGM_A20_APPLY(pVCpu, (GCPtrPage & ~(RTGCPTR)(SHW_PT_MASK << SHW_PT_SHIFT))
2363	\| (iPTDst << PAGE_SHIFT));
2364
2365	PGM_BTH_NAME(SyncPageWorker)(pVCpu, &pPTDst->a[iPTDst], GCPtrCurPage, pShwPage, iPTDst);
2366	Log2(("SyncPage: 4K+ %RGv PteSrc:{P=1 RW=1 U=1} PteDst=%08llx%s\n",
2367	GCPtrCurPage,
2368	SHW_PTE_LOG64(pPTDst->a[iPTDst]),
2369	SHW_PTE_IS_TRACK_DIRTY(pPTDst->a[iPTDst]) ? " Track-Dirty" : ""));
2370
2371	if (RT_UNLIKELY(VM_FF_IS_PENDING(pVM, VM_FF_PGM_NO_MEMORY)))
2372	break;
2373	}
2374	else
2375	Log4(("%RGv iPTDst=%x pPTDst->a[iPTDst] %RX64\n", (GCPtrPage & ~(RTGCPTR)(SHW_PT_MASK << SHW_PT_SHIFT)) \| (iPTDst << PAGE_SHIFT), iPTDst, SHW_PTE_LOG64(pPTDst->a[iPTDst]) ));
2376	}
2377	}
2378	else
2379	# endif /* PGM_SYNC_N_PAGES */
2380	{
2381	const unsigned iPTDst = (GCPtrPage >> SHW_PT_SHIFT) & SHW_PT_MASK;
2382	RTGCPTR GCPtrCurPage = PGM_A20_APPLY(pVCpu, (GCPtrPage & ~(RTGCPTR)(SHW_PT_MASK << SHW_PT_SHIFT))
2383	\| (iPTDst << PAGE_SHIFT));
2384
2385	PGM_BTH_NAME(SyncPageWorker)(pVCpu, &pPTDst->a[iPTDst], GCPtrCurPage, pShwPage, iPTDst);
2386
2387	Log2(("SyncPage: 4K %RGv PteSrc:{P=1 RW=1 U=1}PteDst=%08llx%s\n",
2388	GCPtrPage,
2389	SHW_PTE_LOG64(pPTDst->a[iPTDst]),
2390	SHW_PTE_IS_TRACK_DIRTY(pPTDst->a[iPTDst]) ? " Track-Dirty" : ""));
2391	}
2392	return VINF_SUCCESS;
2393
2394	#else
2395	NOREF(PdeSrc);
2396	AssertReleaseMsgFailed(("Shw=%d Gst=%d is not implemented!\n", PGM_GST_TYPE, PGM_SHW_TYPE));
2397	return VERR_PGM_NOT_USED_IN_MODE;
2398	#endif
2399	}
2400
2401
2402	#if PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE)
2403
2404	/**
2405	* CheckPageFault helper for returning a page fault indicating a non-present
2406	* (NP) entry in the page translation structures.
2407	*
2408	* @returns VINF_EM_RAW_GUEST_TRAP.
2409	* @param pVCpu The cross context virtual CPU structure.
2410	* @param uErr The error code of the shadow fault. Corrections to
2411	* TRPM's copy will be made if necessary.
2412	* @param GCPtrPage For logging.
2413	* @param uPageFaultLevel For logging.
2414	*/
2415	DECLINLINE(int) PGM_BTH_NAME(CheckPageFaultReturnNP)(PVMCPU pVCpu, uint32_t uErr, RTGCPTR GCPtrPage, unsigned uPageFaultLevel)
2416	{
2417	STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->CTX_MID_Z(Stat,DirtyTrackRealPF));
2418	AssertMsg(!(uErr & X86_TRAP_PF_P), ("%#x\n", uErr));
2419	AssertMsg(!(uErr & X86_TRAP_PF_RSVD), ("%#x\n", uErr));
2420	if (uErr & (X86_TRAP_PF_RSVD \| X86_TRAP_PF_P))
2421	TRPMSetErrorCode(pVCpu, uErr & ~(X86_TRAP_PF_RSVD \| X86_TRAP_PF_P));
2422
2423	Log(("CheckPageFault: real page fault (notp) at %RGv (%d)\n", GCPtrPage, uPageFaultLevel));
2424	RT_NOREF_PV(GCPtrPage); RT_NOREF_PV(uPageFaultLevel);
2425	return VINF_EM_RAW_GUEST_TRAP;
2426	}
2427
2428
2429	/**
2430	* CheckPageFault helper for returning a page fault indicating a reserved bit
2431	* (RSVD) error in the page translation structures.
2432	*
2433	* @returns VINF_EM_RAW_GUEST_TRAP.
2434	* @param pVCpu The cross context virtual CPU structure.
2435	* @param uErr The error code of the shadow fault. Corrections to
2436	* TRPM's copy will be made if necessary.
2437	* @param GCPtrPage For logging.
2438	* @param uPageFaultLevel For logging.
2439	*/
2440	DECLINLINE(int) PGM_BTH_NAME(CheckPageFaultReturnRSVD)(PVMCPU pVCpu, uint32_t uErr, RTGCPTR GCPtrPage, unsigned uPageFaultLevel)
2441	{
2442	STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->CTX_MID_Z(Stat,DirtyTrackRealPF));
2443	if ((uErr & (X86_TRAP_PF_RSVD \| X86_TRAP_PF_P)) != (X86_TRAP_PF_RSVD \| X86_TRAP_PF_P))
2444	TRPMSetErrorCode(pVCpu, uErr \| X86_TRAP_PF_RSVD \| X86_TRAP_PF_P);
2445
2446	Log(("CheckPageFault: real page fault (rsvd) at %RGv (%d)\n", GCPtrPage, uPageFaultLevel));
2447	RT_NOREF_PV(GCPtrPage); RT_NOREF_PV(uPageFaultLevel);
2448	return VINF_EM_RAW_GUEST_TRAP;
2449	}
2450
2451
2452	/**
2453	* CheckPageFault helper for returning a page protection fault (P).
2454	*
2455	* @returns VINF_EM_RAW_GUEST_TRAP.
2456	* @param pVCpu The cross context virtual CPU structure.
2457	* @param uErr The error code of the shadow fault. Corrections to
2458	* TRPM's copy will be made if necessary.
2459	* @param GCPtrPage For logging.
2460	* @param uPageFaultLevel For logging.
2461	*/
2462	DECLINLINE(int) PGM_BTH_NAME(CheckPageFaultReturnProt)(PVMCPU pVCpu, uint32_t uErr, RTGCPTR GCPtrPage, unsigned uPageFaultLevel)
2463	{
2464	STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->CTX_MID_Z(Stat,DirtyTrackRealPF));
2465	AssertMsg(uErr & (X86_TRAP_PF_RW \| X86_TRAP_PF_US \| X86_TRAP_PF_ID), ("%#x\n", uErr));
2466	if ((uErr & (X86_TRAP_PF_P \| X86_TRAP_PF_RSVD)) != X86_TRAP_PF_P)
2467	TRPMSetErrorCode(pVCpu, (uErr & ~X86_TRAP_PF_RSVD) \| X86_TRAP_PF_P);
2468
2469	Log(("CheckPageFault: real page fault (prot) at %RGv (%d)\n", GCPtrPage, uPageFaultLevel));
2470	RT_NOREF_PV(GCPtrPage); RT_NOREF_PV(uPageFaultLevel);
2471	return VINF_EM_RAW_GUEST_TRAP;
2472	}
2473
2474
2475	/**
2476	* Handle dirty bit tracking faults.
2477	*
2478	* @returns VBox status code.
2479	* @param pVCpu The cross context virtual CPU structure.
2480	* @param uErr Page fault error code.
2481	* @param pPdeSrc Guest page directory entry.
2482	* @param pPdeDst Shadow page directory entry.
2483	* @param GCPtrPage Guest context page address.
2484	*/
2485	static int PGM_BTH_NAME(CheckDirtyPageFault)(PVMCPU pVCpu, uint32_t uErr, PSHWPDE pPdeDst, GSTPDE const *pPdeSrc,
2486	RTGCPTR GCPtrPage)
2487	{
2488	PVM pVM = pVCpu->CTX_SUFF(pVM);
2489	PPGMPOOL pPool = pVM->pgm.s.CTX_SUFF(pPool);
2490	NOREF(uErr);
2491
2492	PGM_LOCK_ASSERT_OWNER(pVM);
2493
2494	/*
2495	* Handle big page.
2496	*/
2497	if (pPdeSrc->b.u1Size && GST_IS_PSE_ACTIVE(pVCpu))
2498	{
2499	if ( pPdeDst->n.u1Present
2500	&& (pPdeDst->u & PGM_PDFLAGS_TRACK_DIRTY))
2501	{
2502	SHWPDE PdeDst = *pPdeDst;
2503
2504	STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->CTX_MID_Z(Stat,DirtyPageTrap));
2505	Assert(pPdeSrc->b.u1Write);
2506
2507	/* Note: No need to invalidate this entry on other VCPUs as a stale TLB entry will not harm; write access will simply
2508	* fault again and take this path to only invalidate the entry (see below).
2509	*/
2510	PdeDst.n.u1Write = 1;
2511	PdeDst.n.u1Accessed = 1;
2512	PdeDst.au32[0] &= ~PGM_PDFLAGS_TRACK_DIRTY;
2513	ASMAtomicWriteSize(pPdeDst, PdeDst.u);
2514	PGM_INVL_BIG_PG(pVCpu, GCPtrPage);
2515	return VINF_PGM_HANDLED_DIRTY_BIT_FAULT; /* restarts the instruction. */
2516	}
2517
2518	# ifdef IN_RING0
2519	/* Check for stale TLB entry; only applies to the SMP guest case. */
2520	if ( pVM->cCpus > 1
2521	&& pPdeDst->n.u1Write
2522	&& pPdeDst->n.u1Accessed)
2523	{
2524	PPGMPOOLPAGE pShwPage = pgmPoolGetPage(pPool, pPdeDst->u & SHW_PDE_PG_MASK);
2525	if (pShwPage)
2526	{
2527	PSHWPT pPTDst = (PSHWPT)PGMPOOL_PAGE_2_PTR_V2(pVM, pVCpu, pShwPage);
2528	PSHWPTE pPteDst = &pPTDst->a[(GCPtrPage >> SHW_PT_SHIFT) & SHW_PT_MASK];
2529	if (SHW_PTE_IS_P_RW(*pPteDst))
2530	{
2531	/* Stale TLB entry. */
2532	STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->CTX_MID_Z(Stat,DirtyPageStale));
2533	PGM_INVL_PG(pVCpu, GCPtrPage);
2534	return VINF_PGM_HANDLED_DIRTY_BIT_FAULT; /* restarts the instruction. */
2535	}
2536	}
2537	}
2538	# endif /* IN_RING0 */
2539	return VINF_PGM_NO_DIRTY_BIT_TRACKING;
2540	}
2541
2542	/*
2543	* Map the guest page table.
2544	*/
2545	PGSTPT pPTSrc;
2546	int rc = PGM_GCPHYS_2_PTR_V2(pVM, pVCpu, GST_GET_PDE_GCPHYS(*pPdeSrc), &pPTSrc);
2547	if (RT_FAILURE(rc))
2548	{
2549	AssertRC(rc);
2550	return rc;
2551	}
2552
2553	if (pPdeDst->n.u1Present)
2554	{
2555	GSTPTE const *pPteSrc = &pPTSrc->a[(GCPtrPage >> GST_PT_SHIFT) & GST_PT_MASK];
2556	const GSTPTE PteSrc = *pPteSrc;
2557
2558	#ifdef VBOX_WITH_RAW_MODE_NOT_R0
2559	/* Bail out here as pgmPoolGetPage will return NULL and we'll crash below.
2560	* Our individual shadow handlers will provide more information and force a fatal exit.
2561	*/
2562	if ( VM_IS_RAW_MODE_ENABLED(pVM)
2563	&& MMHyperIsInsideArea(pVM, (RTGCPTR)GCPtrPage))
2564	{
2565	LogRel(("CheckPageFault: write to hypervisor region %RGv\n", GCPtrPage));
2566	return VINF_PGM_NO_DIRTY_BIT_TRACKING;
2567	}
2568	#endif
2569	/*
2570	* Map shadow page table.
2571	*/
2572	PPGMPOOLPAGE pShwPage = pgmPoolGetPage(pPool, pPdeDst->u & SHW_PDE_PG_MASK);
2573	if (pShwPage)
2574	{
2575	PSHWPT pPTDst = (PSHWPT)PGMPOOL_PAGE_2_PTR_V2(pVM, pVCpu, pShwPage);
2576	PSHWPTE pPteDst = &pPTDst->a[(GCPtrPage >> SHW_PT_SHIFT) & SHW_PT_MASK];
2577	if (SHW_PTE_IS_P(pPteDst)) /* @todo Optimize accessed bit emulation? */
2578	{
2579	if (SHW_PTE_IS_TRACK_DIRTY(*pPteDst))
2580	{
2581	PPGMPAGE pPage = pgmPhysGetPage(pVM, GST_GET_PTE_GCPHYS(PteSrc));
2582	SHWPTE PteDst = *pPteDst;
2583
2584	LogFlow(("DIRTY page trap addr=%RGv\n", GCPtrPage));
2585	STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->CTX_MID_Z(Stat,DirtyPageTrap));
2586
2587	Assert(PteSrc.n.u1Write);
2588
2589	/* Note: No need to invalidate this entry on other VCPUs as a stale TLB
2590	* entry will not harm; write access will simply fault again and
2591	* take this path to only invalidate the entry.
2592	*/
2593	if (RT_LIKELY(pPage))
2594	{
2595	if (PGM_PAGE_HAS_ACTIVE_HANDLERS(pPage))
2596	{
2597	//AssertMsgFailed(("%R[pgmpage] - we don't set PGM_PTFLAGS_TRACK_DIRTY for these pages\n", pPage));
2598	Assert(!PGM_PAGE_HAS_ACTIVE_ALL_HANDLERS(pPage));
2599	/* Assuming write handlers here as the PTE is present (otherwise we wouldn't be here). */
2600	SHW_PTE_SET_RO(PteDst);
2601	}
2602	else
2603	{
2604	if ( PGM_PAGE_GET_STATE(pPage) == PGM_PAGE_STATE_WRITE_MONITORED
2605	&& PGM_PAGE_GET_TYPE(pPage) == PGMPAGETYPE_RAM)
2606	{
2607	rc = pgmPhysPageMakeWritable(pVM, pPage, GST_GET_PTE_GCPHYS(PteSrc));
2608	AssertRC(rc);
2609	}
2610	if (PGM_PAGE_GET_STATE(pPage) == PGM_PAGE_STATE_ALLOCATED)
2611	SHW_PTE_SET_RW(PteDst);
2612	else
2613	{
2614	/* Still applies to shared pages. */
2615	Assert(!PGM_PAGE_IS_ZERO(pPage));
2616	SHW_PTE_SET_RO(PteDst);
2617	}
2618	}
2619	}
2620	else
2621	SHW_PTE_SET_RW(PteDst); /** @todo r=bird: This doesn't make sense to me. */
2622
2623	SHW_PTE_SET(PteDst, (SHW_PTE_GET_U(PteDst) \| X86_PTE_D \| X86_PTE_A) & ~(uint64_t)PGM_PTFLAGS_TRACK_DIRTY);
2624	SHW_PTE_ATOMIC_SET2(*pPteDst, PteDst);
2625	PGM_INVL_PG(pVCpu, GCPtrPage);
2626	return VINF_PGM_HANDLED_DIRTY_BIT_FAULT; /* restarts the instruction. */
2627	}
2628
2629	# ifdef IN_RING0
2630	/* Check for stale TLB entry; only applies to the SMP guest case. */
2631	if ( pVM->cCpus > 1
2632	&& SHW_PTE_IS_RW(*pPteDst)
2633	&& SHW_PTE_IS_A(*pPteDst))
2634	{
2635	/* Stale TLB entry. */
2636	STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->CTX_MID_Z(Stat,DirtyPageStale));
2637	PGM_INVL_PG(pVCpu, GCPtrPage);
2638	return VINF_PGM_HANDLED_DIRTY_BIT_FAULT; /* restarts the instruction. */
2639	}
2640	# endif
2641	}
2642	}
2643	else
2644	AssertMsgFailed(("pgmPoolGetPageByHCPhys %RGp failed!\n", pPdeDst->u & SHW_PDE_PG_MASK));
2645	}
2646
2647	return VINF_PGM_NO_DIRTY_BIT_TRACKING;
2648	}
2649
2650	#endif /* PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE) */
2651
2652
2653	/**
2654	* Sync a shadow page table.
2655	*
2656	* The shadow page table is not present in the shadow PDE.
2657	*
2658	* Handles mapping conflicts.
2659	*
2660	* This is called by VerifyAccessSyncPage, PrefetchPage, InvalidatePage (on
2661	* conflict), and Trap0eHandler.
2662	*
2663	* A precondition for this method is that the shadow PDE is not present. The
2664	* caller must take the PGM lock before checking this and continue to hold it
2665	* when calling this method.
2666	*
2667	* @returns VBox status code.
2668	* @param pVCpu The cross context virtual CPU structure.
2669	* @param iPDSrc Page directory index.
2670	* @param pPDSrc Source page directory (i.e. Guest OS page directory).
2671	* Assume this is a temporary mapping.
2672	* @param GCPtrPage GC Pointer of the page that caused the fault
2673	*/
2674	static int PGM_BTH_NAME(SyncPT)(PVMCPU pVCpu, unsigned iPDSrc, PGSTPD pPDSrc, RTGCPTR GCPtrPage)
2675	{
2676	PVM pVM = pVCpu->CTX_SUFF(pVM);
2677	PPGMPOOL pPool = pVM->pgm.s.CTX_SUFF(pPool); NOREF(pPool);
2678
2679	#if 0 /* rarely useful; leave for debugging. */
2680	STAM_COUNTER_INC(&pVCpu->pgm.s.StatSyncPtPD[iPDSrc]);
2681	#endif
2682	LogFlow(("SyncPT: GCPtrPage=%RGv\n", GCPtrPage)); RT_NOREF_PV(GCPtrPage);
2683
2684	PGM_LOCK_ASSERT_OWNER(pVM);
2685
2686	#if ( PGM_GST_TYPE == PGM_TYPE_32BIT \
2687	\|\| PGM_GST_TYPE == PGM_TYPE_PAE \
2688	\|\| PGM_GST_TYPE == PGM_TYPE_AMD64) \
2689	&& PGM_SHW_TYPE != PGM_TYPE_NESTED \
2690	&& PGM_SHW_TYPE != PGM_TYPE_EPT
2691
2692	int rc = VINF_SUCCESS;
2693
2694	STAM_PROFILE_START(&pVCpu->pgm.s.CTX_SUFF(pStats)->CTX_MID_Z(Stat,SyncPT), a);
2695
2696	/*
2697	* Some input validation first.
2698	*/
2699	AssertMsg(iPDSrc == ((GCPtrPage >> GST_PD_SHIFT) & GST_PD_MASK), ("iPDSrc=%x GCPtrPage=%RGv\n", iPDSrc, GCPtrPage));
2700
2701	/*
2702	* Get the relevant shadow PDE entry.
2703	*/
2704	# if PGM_SHW_TYPE == PGM_TYPE_32BIT
2705	const unsigned iPDDst = GCPtrPage >> SHW_PD_SHIFT;
2706	PSHWPDE pPdeDst = pgmShwGet32BitPDEPtr(pVCpu, GCPtrPage);
2707
2708	/* Fetch the pgm pool shadow descriptor. */
2709	PPGMPOOLPAGE pShwPde = pVCpu->pgm.s.CTX_SUFF(pShwPageCR3);
2710	Assert(pShwPde);
2711
2712	# elif PGM_SHW_TYPE == PGM_TYPE_PAE
2713	const unsigned iPDDst = (GCPtrPage >> SHW_PD_SHIFT) & SHW_PD_MASK;
2714	PPGMPOOLPAGE pShwPde = NULL;
2715	PX86PDPAE pPDDst;
2716	PSHWPDE pPdeDst;
2717
2718	/* Fetch the pgm pool shadow descriptor. */
2719	rc = pgmShwGetPaePoolPagePD(pVCpu, GCPtrPage, &pShwPde);
2720	AssertRCSuccessReturn(rc, rc);
2721	Assert(pShwPde);
2722
2723	pPDDst = (PX86PDPAE)PGMPOOL_PAGE_2_PTR_V2(pVM, pVCpu, pShwPde);
2724	pPdeDst = &pPDDst->a[iPDDst];
2725
2726	# elif PGM_SHW_TYPE == PGM_TYPE_AMD64
2727	const unsigned iPdpt = (GCPtrPage >> X86_PDPT_SHIFT) & X86_PDPT_MASK_AMD64;
2728	const unsigned iPDDst = (GCPtrPage >> SHW_PD_SHIFT) & SHW_PD_MASK;
2729	PX86PDPAE pPDDst = NULL; /* initialized to shut up gcc */
2730	PX86PDPT pPdptDst = NULL; /* initialized to shut up gcc */
2731	rc = pgmShwGetLongModePDPtr(pVCpu, GCPtrPage, NULL, &pPdptDst, &pPDDst);
2732	AssertRCSuccessReturn(rc, rc);
2733	Assert(pPDDst);
2734	PSHWPDE pPdeDst = &pPDDst->a[iPDDst];
2735	# endif
2736	SHWPDE PdeDst = *pPdeDst;
2737
2738	# if PGM_GST_TYPE == PGM_TYPE_AMD64
2739	/* Fetch the pgm pool shadow descriptor. */
2740	PPGMPOOLPAGE pShwPde = pgmPoolGetPage(pPool, pPdptDst->a[iPdpt].u & X86_PDPE_PG_MASK);
2741	Assert(pShwPde);
2742	# endif
2743
2744	# ifndef PGM_WITHOUT_MAPPINGS
2745	/*
2746	* Check for conflicts.
2747	* RC: In case of a conflict we'll go to Ring-3 and do a full SyncCR3.
2748	* R3: Simply resolve the conflict.
2749	*/
2750	if (PdeDst.u & PGM_PDFLAGS_MAPPING)
2751	{
2752	Assert(pgmMapAreMappingsEnabled(pVM));
2753	# ifndef IN_RING3
2754	Log(("SyncPT: Conflict at %RGv\n", GCPtrPage));
2755	STAM_PROFILE_STOP(&pVCpu->pgm.s.CTX_SUFF(pStats)->CTX_MID_Z(Stat,SyncPT), a);
2756	return VERR_ADDRESS_CONFLICT;
2757
2758	# else /* IN_RING3 */
2759	PPGMMAPPING pMapping = pgmGetMapping(pVM, (RTGCPTR)GCPtrPage);
2760	Assert(pMapping);
2761	# if PGM_GST_TYPE == PGM_TYPE_32BIT
2762	rc = pgmR3SyncPTResolveConflict(pVM, pMapping, pPDSrc, GCPtrPage & (GST_PD_MASK << GST_PD_SHIFT));
2763	# elif PGM_GST_TYPE == PGM_TYPE_PAE
2764	rc = pgmR3SyncPTResolveConflictPAE(pVM, pMapping, GCPtrPage & (GST_PD_MASK << GST_PD_SHIFT));
2765	# else
2766	AssertFailed(); NOREF(pMapping); /* can't happen for amd64 */
2767	# endif
2768	if (RT_FAILURE(rc))
2769	{
2770	STAM_PROFILE_STOP(&pVCpu->pgm.s.CTX_SUFF(pStats)->CTX_MID_Z(Stat,SyncPT), a);
2771	return rc;
2772	}
2773	PdeDst = *pPdeDst;
2774	# endif /* IN_RING3 */
2775	}
2776	# endif /* !PGM_WITHOUT_MAPPINGS */
2777	Assert(!PdeDst.n.u1Present); /* We're only supposed to call SyncPT on PDE!P and conflicts.*/
2778
2779	/*
2780	* Sync the page directory entry.
2781	*/
2782	GSTPDE PdeSrc = pPDSrc->a[iPDSrc];
2783	const bool fPageTable = !PdeSrc.b.u1Size \|\| !GST_IS_PSE_ACTIVE(pVCpu);
2784	if ( PdeSrc.n.u1Present
2785	&& (fPageTable ? GST_IS_PDE_VALID(pVCpu, PdeSrc) : GST_IS_BIG_PDE_VALID(pVCpu, PdeSrc)) )
2786	{
2787	/*
2788	* Allocate & map the page table.
2789	*/
2790	PSHWPT pPTDst;
2791	PPGMPOOLPAGE pShwPage;
2792	RTGCPHYS GCPhys;
2793	if (fPageTable)
2794	{
2795	GCPhys = GST_GET_PDE_GCPHYS(PdeSrc);
2796	# if PGM_SHW_TYPE == PGM_TYPE_PAE && PGM_GST_TYPE == PGM_TYPE_32BIT
2797	/* Select the right PDE as we're emulating a 4kb page table with 2 shadow page tables. */
2798	GCPhys = PGM_A20_APPLY(pVCpu, GCPhys \| ((iPDDst & 1) * (PAGE_SIZE / 2)));
2799	# endif
2800	rc = pgmPoolAlloc(pVM, GCPhys, BTH_PGMPOOLKIND_PT_FOR_PT, PGMPOOLACCESS_DONTCARE, PGM_A20_IS_ENABLED(pVCpu),
2801	pShwPde->idx, iPDDst, false /fLockPage/,
2802	&pShwPage);
2803	}
2804	else
2805	{
2806	PGMPOOLACCESS enmAccess;
2807	# if PGM_WITH_NX(PGM_GST_TYPE, PGM_SHW_TYPE)
2808	const bool fNoExecute = PdeSrc.n.u1NoExecute && GST_IS_NX_ACTIVE(pVCpu);
2809	# else
2810	const bool fNoExecute = false;
2811	# endif
2812
2813	GCPhys = GST_GET_BIG_PDE_GCPHYS(pVM, PdeSrc);
2814	# if PGM_SHW_TYPE == PGM_TYPE_PAE && PGM_GST_TYPE == PGM_TYPE_32BIT
2815	/* Select the right PDE as we're emulating a 4MB page directory with two 2 MB shadow PDEs.*/
2816	GCPhys = PGM_A20_APPLY(pVCpu, GCPhys \| (GCPtrPage & (1 << X86_PD_PAE_SHIFT)));
2817	# endif
2818	/* Determine the right kind of large page to avoid incorrect cached entry reuse. */
2819	if (PdeSrc.n.u1User)
2820	{
2821	if (PdeSrc.n.u1Write)
2822	enmAccess = (fNoExecute) ? PGMPOOLACCESS_USER_RW_NX : PGMPOOLACCESS_USER_RW;
2823	else
2824	enmAccess = (fNoExecute) ? PGMPOOLACCESS_USER_R_NX : PGMPOOLACCESS_USER_R;
2825	}
2826	else
2827	{
2828	if (PdeSrc.n.u1Write)
2829	enmAccess = (fNoExecute) ? PGMPOOLACCESS_SUPERVISOR_RW_NX : PGMPOOLACCESS_SUPERVISOR_RW;
2830	else
2831	enmAccess = (fNoExecute) ? PGMPOOLACCESS_SUPERVISOR_R_NX : PGMPOOLACCESS_SUPERVISOR_R;
2832	}
2833	rc = pgmPoolAlloc(pVM, GCPhys, BTH_PGMPOOLKIND_PT_FOR_BIG, enmAccess, PGM_A20_IS_ENABLED(pVCpu),
2834	pShwPde->idx, iPDDst, false /fLockPage/,
2835	&pShwPage);
2836	}
2837	if (rc == VINF_SUCCESS)
2838	pPTDst = (PSHWPT)PGMPOOL_PAGE_2_PTR_V2(pVM, pVCpu, pShwPage);
2839	else if (rc == VINF_PGM_CACHED_PAGE)
2840	{
2841	/*
2842	* The PT was cached, just hook it up.
2843	*/
2844	if (fPageTable)
2845	PdeDst.u = pShwPage->Core.Key \| GST_GET_PDE_SHW_FLAGS(pVCpu, PdeSrc);
2846	else
2847	{
2848	PdeDst.u = pShwPage->Core.Key \| GST_GET_BIG_PDE_SHW_FLAGS(pVCpu, PdeSrc);
2849	/* (see explanation and assumptions further down.) */
2850	if ( !PdeSrc.b.u1Dirty
2851	&& PdeSrc.b.u1Write)
2852	{
2853	STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->CTX_MID_Z(Stat,DirtyPageBig));
2854	PdeDst.u \|= PGM_PDFLAGS_TRACK_DIRTY;
2855	PdeDst.b.u1Write = 0;
2856	}
2857	}
2858	ASMAtomicWriteSize(pPdeDst, PdeDst.u);
2859	PGM_DYNMAP_UNUSED_HINT(pVCpu, pPdeDst);
2860	return VINF_SUCCESS;
2861	}
2862	else if (rc == VERR_PGM_POOL_FLUSHED)
2863	{
2864	VMCPU_FF_SET(pVCpu, VMCPU_FF_PGM_SYNC_CR3);
2865	PGM_DYNMAP_UNUSED_HINT(pVCpu, pPdeDst);
2866	return VINF_PGM_SYNC_CR3;
2867	}
2868	else
2869	AssertMsgFailedReturn(("rc=%Rrc\n", rc), RT_FAILURE_NP(rc) ? rc : VERR_IPE_UNEXPECTED_INFO_STATUS);
2870	/** @todo Why do we bother preserving X86_PDE_AVL_MASK here?
2871	* Both PGM_PDFLAGS_MAPPING and PGM_PDFLAGS_TRACK_DIRTY should be
2872	* irrelevant at this point. */
2873	PdeDst.u &= X86_PDE_AVL_MASK;
2874	PdeDst.u \|= pShwPage->Core.Key;
2875
2876	/*
2877	* Page directory has been accessed (this is a fault situation, remember).
2878	*/
2879	/** @todo
2880	* Well, when the caller is PrefetchPage or InvalidatePage is isn't a
2881	* fault situation. What's more, the Trap0eHandler has already set the
2882	* accessed bit. So, it's actually just VerifyAccessSyncPage which
2883	* might need setting the accessed flag.
2884	*
2885	* The best idea is to leave this change to the caller and add an
2886	* assertion that it's set already. */
2887	pPDSrc->a[iPDSrc].n.u1Accessed = 1;
2888	if (fPageTable)
2889	{
2890	/*
2891	* Page table - 4KB.
2892	*
2893	* Sync all or just a few entries depending on PGM_SYNC_N_PAGES.
2894	*/
2895	Log2(("SyncPT: 4K %RGv PdeSrc:{P=%d RW=%d U=%d raw=%08llx}\n",
2896	GCPtrPage, PdeSrc.b.u1Present, PdeSrc.b.u1Write, PdeSrc.b.u1User, (uint64_t)PdeSrc.u));
2897	PGSTPT pPTSrc;
2898	rc = PGM_GCPHYS_2_PTR(pVM, GST_GET_PDE_GCPHYS(PdeSrc), &pPTSrc);
2899	if (RT_SUCCESS(rc))
2900	{
2901	/*
2902	* Start by syncing the page directory entry so CSAM's TLB trick works.
2903	*/
2904	PdeDst.u = (PdeDst.u & (SHW_PDE_PG_MASK \| X86_PDE_AVL_MASK))
2905	\| GST_GET_PDE_SHW_FLAGS(pVCpu, PdeSrc);
2906	ASMAtomicWriteSize(pPdeDst, PdeDst.u);
2907	PGM_DYNMAP_UNUSED_HINT(pVCpu, pPdeDst);
2908
2909	/*
2910	* Directory/page user or supervisor privilege: (same goes for read/write)
2911	*
2912	* Directory Page Combined
2913	* U/S U/S U/S
2914	* 0 0 0
2915	* 0 1 0
2916	* 1 0 0
2917	* 1 1 1
2918	*
2919	* Simple AND operation. Table listed for completeness.
2920	*
2921	*/
2922	STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->CTX_MID_Z(Stat,SyncPT4K));
2923	# ifdef PGM_SYNC_N_PAGES
2924	unsigned iPTBase = (GCPtrPage >> SHW_PT_SHIFT) & SHW_PT_MASK;
2925	unsigned iPTDst = iPTBase;
2926	const unsigned iPTDstEnd = RT_MIN(iPTDst + PGM_SYNC_NR_PAGES / 2, RT_ELEMENTS(pPTDst->a));
2927	if (iPTDst <= PGM_SYNC_NR_PAGES / 2)
2928	iPTDst = 0;
2929	else
2930	iPTDst -= PGM_SYNC_NR_PAGES / 2;
2931	# else /* !PGM_SYNC_N_PAGES */
2932	unsigned iPTDst = 0;
2933	const unsigned iPTDstEnd = RT_ELEMENTS(pPTDst->a);
2934	# endif /* !PGM_SYNC_N_PAGES */
2935	RTGCPTR GCPtrCur = (GCPtrPage & ~(RTGCPTR)((1 << SHW_PD_SHIFT) - 1))
2936	\| ((RTGCPTR)iPTDst << PAGE_SHIFT);
2937	# if PGM_SHW_TYPE == PGM_TYPE_PAE && PGM_GST_TYPE == PGM_TYPE_32BIT
2938	/* Select the right PDE as we're emulating a 4kb page table with 2 shadow page tables. */
2939	const unsigned offPTSrc = ((GCPtrPage >> SHW_PD_SHIFT) & 1) * 512;
2940	# else
2941	const unsigned offPTSrc = 0;
2942	# endif
2943	for (; iPTDst < iPTDstEnd; iPTDst++, GCPtrCur += PAGE_SIZE)
2944	{
2945	const unsigned iPTSrc = iPTDst + offPTSrc;
2946	const GSTPTE PteSrc = pPTSrc->a[iPTSrc];
2947
2948	if (PteSrc.n.u1Present)
2949	{
2950	# ifdef VBOX_WITH_RAW_MODE_NOT_R0
2951	/*
2952	* Assuming kernel code will be marked as supervisor - and not as user level
2953	* and executed using a conforming code selector - And marked as readonly.
2954	* Also assume that if we're monitoring a page, it's of no interest to CSAM.
2955	*/
2956	PPGMPAGE pPage;
2957	if ( ((PdeSrc.u & pPTSrc->a[iPTSrc].u) & (X86_PTE_RW \| X86_PTE_US))
2958	\|\| !CSAMDoesPageNeedScanning(pVM, GCPtrCur)
2959	\|\| ( (pPage = pgmPhysGetPage(pVM, GST_GET_PTE_GCPHYS(PteSrc)))
2960	&& PGM_PAGE_HAS_ACTIVE_HANDLERS(pPage))
2961	)
2962	# endif
2963	PGM_BTH_NAME(SyncPageWorker)(pVCpu, &pPTDst->a[iPTDst], PdeSrc, PteSrc, pShwPage, iPTDst);
2964	Log2(("SyncPT: 4K+ %RGv PteSrc:{P=%d RW=%d U=%d raw=%08llx}%s dst.raw=%08llx iPTSrc=%x PdeSrc.u=%x physpte=%RGp\n",
2965	GCPtrCur,
2966	PteSrc.n.u1Present,
2967	PteSrc.n.u1Write & PdeSrc.n.u1Write,
2968	PteSrc.n.u1User & PdeSrc.n.u1User,
2969	(uint64_t)PteSrc.u,
2970	SHW_PTE_IS_TRACK_DIRTY(pPTDst->a[iPTDst]) ? " Track-Dirty" : "", SHW_PTE_LOG64(pPTDst->a[iPTDst]), iPTSrc, PdeSrc.au32[0],
2971	(RTGCPHYS)(GST_GET_PDE_GCPHYS(PdeSrc) + iPTSrc*sizeof(PteSrc)) ));
2972	}
2973	/* else: the page table was cleared by the pool */
2974	} /* for PTEs */
2975	}
2976	}
2977	else
2978	{
2979	/*
2980	* Big page - 2/4MB.
2981	*
2982	* We'll walk the ram range list in parallel and optimize lookups.
2983	* We will only sync one shadow page table at a time.
2984	*/
2985	STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->CTX_MID_Z(Stat,SyncPT4M));
2986
2987	/**
2988	* @todo It might be more efficient to sync only a part of the 4MB
2989	* page (similar to what we do for 4KB PDs).
2990	*/
2991
2992	/*
2993	* Start by syncing the page directory entry.
2994	*/
2995	PdeDst.u = (PdeDst.u & (SHW_PDE_PG_MASK \| (X86_PDE_AVL_MASK & ~PGM_PDFLAGS_TRACK_DIRTY)))
2996	\| GST_GET_BIG_PDE_SHW_FLAGS(pVCpu, PdeSrc);
2997
2998	/*
2999	* If the page is not flagged as dirty and is writable, then make it read-only
3000	* at PD level, so we can set the dirty bit when the page is modified.
3001	*
3002	* ASSUMES that page access handlers are implemented on page table entry level.
3003	* Thus we will first catch the dirty access and set PDE.D and restart. If
3004	* there is an access handler, we'll trap again and let it work on the problem.
3005	*/
3006	/** @todo move the above stuff to a section in the PGM documentation. */
3007	Assert(!(PdeDst.u & PGM_PDFLAGS_TRACK_DIRTY));
3008	if ( !PdeSrc.b.u1Dirty
3009	&& PdeSrc.b.u1Write)
3010	{
3011	STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->CTX_MID_Z(Stat,DirtyPageBig));
3012	PdeDst.u \|= PGM_PDFLAGS_TRACK_DIRTY;
3013	PdeDst.b.u1Write = 0;
3014	}
3015	ASMAtomicWriteSize(pPdeDst, PdeDst.u);
3016	PGM_DYNMAP_UNUSED_HINT(pVCpu, pPdeDst);
3017
3018	/*
3019	* Fill the shadow page table.
3020	*/
3021	/* Get address and flags from the source PDE. */
3022	SHWPTE PteDstBase;
3023	SHW_PTE_SET(PteDstBase, GST_GET_BIG_PDE_SHW_FLAGS_4_PTE(pVCpu, PdeSrc));
3024
3025	/* Loop thru the entries in the shadow PT. */
3026	const RTGCPTR GCPtr = (GCPtrPage >> SHW_PD_SHIFT) << SHW_PD_SHIFT; NOREF(GCPtr);
3027	Log2(("SyncPT: BIG %RGv PdeSrc:{P=%d RW=%d U=%d raw=%08llx} Shw=%RGv GCPhys=%RGp %s\n",
3028	GCPtrPage, PdeSrc.b.u1Present, PdeSrc.b.u1Write, PdeSrc.b.u1User, (uint64_t)PdeSrc.u, GCPtr,
3029	GCPhys, PdeDst.u & PGM_PDFLAGS_TRACK_DIRTY ? " Track-Dirty" : ""));
3030	PPGMRAMRANGE pRam = pgmPhysGetRangeAtOrAbove(pVM, GCPhys);
3031	unsigned iPTDst = 0;
3032	while ( iPTDst < RT_ELEMENTS(pPTDst->a)
3033	&& !VM_FF_IS_PENDING(pVM, VM_FF_PGM_NO_MEMORY))
3034	{
3035	if (pRam && GCPhys >= pRam->GCPhys)
3036	{
3037	# ifndef PGM_WITH_A20
3038	unsigned iHCPage = (GCPhys - pRam->GCPhys) >> PAGE_SHIFT;
3039	# endif
3040	do
3041	{
3042	/* Make shadow PTE. */
3043	# ifdef PGM_WITH_A20
3044	PPGMPAGE pPage = &pRam->aPages[(GCPhys - pRam->GCPhys) >> PAGE_SHIFT];
3045	# else
3046	PPGMPAGE pPage = &pRam->aPages[iHCPage];
3047	# endif
3048	SHWPTE PteDst;
3049
3050	# ifndef VBOX_WITH_NEW_LAZY_PAGE_ALLOC
3051	/* Try to make the page writable if necessary. */
3052	if ( PGM_PAGE_GET_TYPE(pPage) == PGMPAGETYPE_RAM
3053	&& ( PGM_PAGE_IS_ZERO(pPage)
3054	\|\| ( SHW_PTE_IS_RW(PteDstBase)
3055	&& PGM_PAGE_GET_STATE(pPage) != PGM_PAGE_STATE_ALLOCATED
3056	# ifdef VBOX_WITH_REAL_WRITE_MONITORED_PAGES
3057	&& PGM_PAGE_GET_STATE(pPage) != PGM_PAGE_STATE_WRITE_MONITORED
3058	# endif
3059	# ifdef VBOX_WITH_PAGE_SHARING
3060	&& PGM_PAGE_GET_STATE(pPage) != PGM_PAGE_STATE_SHARED
3061	# endif
3062	&& !PGM_PAGE_IS_BALLOONED(pPage))
3063	)
3064	)
3065	{
3066	rc = pgmPhysPageMakeWritable(pVM, pPage, GCPhys);
3067	AssertRCReturn(rc, rc);
3068	if (VM_FF_IS_PENDING(pVM, VM_FF_PGM_NO_MEMORY))
3069	break;
3070	}
3071	# endif
3072
3073	if (PGM_PAGE_HAS_ACTIVE_HANDLERS(pPage))
3074	PGM_BTH_NAME(SyncHandlerPte)(pVM, pPage, SHW_PTE_GET_U(PteDstBase), &PteDst);
3075	else if (PGM_PAGE_IS_BALLOONED(pPage))
3076	SHW_PTE_SET(PteDst, 0); /* Handle ballooned pages at #PF time. */
3077	# ifdef VBOX_WITH_RAW_MODE_NOT_R0
3078	/*
3079	* Assuming kernel code will be marked as supervisor and not as user level and executed
3080	* using a conforming code selector. Don't check for readonly, as that implies the whole
3081	* 4MB can be code or readonly data. Linux enables write access for its large pages.
3082	*/
3083	else if ( !PdeSrc.n.u1User
3084	&& CSAMDoesPageNeedScanning(pVM, GCPtr \| (iPTDst << SHW_PT_SHIFT)))
3085	SHW_PTE_SET(PteDst, 0);
3086	# endif
3087	else
3088	SHW_PTE_SET(PteDst, PGM_PAGE_GET_HCPHYS(pPage) \| SHW_PTE_GET_U(PteDstBase));
3089
3090	/* Only map writable pages writable. */
3091	if ( SHW_PTE_IS_P_RW(PteDst)
3092	&& PGM_PAGE_GET_STATE(pPage) != PGM_PAGE_STATE_ALLOCATED)
3093	{
3094	/* Still applies to shared pages. */
3095	Assert(!PGM_PAGE_IS_ZERO(pPage));
3096	SHW_PTE_SET_RO(PteDst); /** @todo this isn't quite working yet... */
3097	Log3(("SyncPT: write-protecting %RGp pPage=%R[pgmpage] at %RGv\n", GCPhys, pPage, (RTGCPTR)(GCPtr \| (iPTDst << SHW_PT_SHIFT))));
3098	}
3099
3100	if (SHW_PTE_IS_P(PteDst))
3101	PGM_BTH_NAME(SyncPageWorkerTrackAddref)(pVCpu, pShwPage, PGM_PAGE_GET_TRACKING(pPage), pPage, iPTDst);
3102
3103	/* commit it (not atomic, new table) */
3104	pPTDst->a[iPTDst] = PteDst;
3105	Log4(("SyncPT: BIG %RGv PteDst:{P=%d RW=%d U=%d raw=%08llx}%s\n",
3106	(RTGCPTR)(GCPtr \| (iPTDst << SHW_PT_SHIFT)), SHW_PTE_IS_P(PteDst), SHW_PTE_IS_RW(PteDst), SHW_PTE_IS_US(PteDst), SHW_PTE_LOG64(PteDst),
3107	SHW_PTE_IS_TRACK_DIRTY(PteDst) ? " Track-Dirty" : ""));
3108
3109	/* advance */
3110	GCPhys += PAGE_SIZE;
3111	PGM_A20_APPLY_TO_VAR(pVCpu, GCPhys);
3112	# ifndef PGM_WITH_A20
3113	iHCPage++;
3114	# endif
3115	iPTDst++;
3116	} while ( iPTDst < RT_ELEMENTS(pPTDst->a)
3117	&& GCPhys <= pRam->GCPhysLast);
3118
3119	/* Advance ram range list. */
3120	while (pRam && GCPhys > pRam->GCPhysLast)
3121	pRam = pRam->CTX_SUFF(pNext);
3122	}
3123	else if (pRam)
3124	{
3125	Log(("Invalid pages at %RGp\n", GCPhys));
3126	do
3127	{
3128	SHW_PTE_SET(pPTDst->a[iPTDst], 0); /* Invalid page, we must handle them manually. */
3129	GCPhys += PAGE_SIZE;
3130	iPTDst++;
3131	} while ( iPTDst < RT_ELEMENTS(pPTDst->a)
3132	&& GCPhys < pRam->GCPhys);
3133	PGM_A20_APPLY_TO_VAR(pVCpu,GCPhys);
3134	}
3135	else
3136	{
3137	Log(("Invalid pages at %RGp (2)\n", GCPhys));
3138	for ( ; iPTDst < RT_ELEMENTS(pPTDst->a); iPTDst++)
3139	SHW_PTE_SET(pPTDst->a[iPTDst], 0); /* Invalid page, we must handle them manually. */
3140	}
3141	} /* while more PTEs */
3142	} /* 4KB / 4MB */
3143	}
3144	else
3145	AssertRelease(!PdeDst.n.u1Present);
3146
3147	STAM_PROFILE_STOP(&pVCpu->pgm.s.CTX_SUFF(pStats)->CTX_MID_Z(Stat,SyncPT), a);
3148	if (RT_FAILURE(rc))
3149	STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->CTX_MID_Z(Stat,SyncPTFailed));
3150	return rc;
3151
3152	#elif (PGM_GST_TYPE == PGM_TYPE_REAL \|\| PGM_GST_TYPE == PGM_TYPE_PROT) \
3153	&& PGM_SHW_TYPE != PGM_TYPE_NESTED \
3154	&& (PGM_SHW_TYPE != PGM_TYPE_EPT \|\| PGM_GST_TYPE == PGM_TYPE_PROT) \
3155	&& !defined(IN_RC)
3156	NOREF(iPDSrc); NOREF(pPDSrc);
3157
3158	STAM_PROFILE_START(&pVCpu->pgm.s.CTX_SUFF(pStats)->CTX_MID_Z(Stat,SyncPT), a);
3159
3160	/*
3161	* Validate input a little bit.
3162	*/
3163	int rc = VINF_SUCCESS;
3164	# if PGM_SHW_TYPE == PGM_TYPE_32BIT
3165	const unsigned iPDDst = (GCPtrPage >> SHW_PD_SHIFT) & SHW_PD_MASK;
3166	PSHWPDE pPdeDst = pgmShwGet32BitPDEPtr(pVCpu, GCPtrPage);
3167
3168	/* Fetch the pgm pool shadow descriptor. */
3169	PPGMPOOLPAGE pShwPde = pVCpu->pgm.s.CTX_SUFF(pShwPageCR3);
3170	Assert(pShwPde);
3171
3172	# elif PGM_SHW_TYPE == PGM_TYPE_PAE
3173	const unsigned iPDDst = (GCPtrPage >> SHW_PD_SHIFT) & SHW_PD_MASK;
3174	PPGMPOOLPAGE pShwPde = NULL; /* initialized to shut up gcc */
3175	PX86PDPAE pPDDst;
3176	PSHWPDE pPdeDst;
3177
3178	/* Fetch the pgm pool shadow descriptor. */
3179	rc = pgmShwGetPaePoolPagePD(pVCpu, GCPtrPage, &pShwPde);
3180	AssertRCSuccessReturn(rc, rc);
3181	Assert(pShwPde);
3182
3183	pPDDst = (PX86PDPAE)PGMPOOL_PAGE_2_PTR_V2(pVM, pVCpu, pShwPde);
3184	pPdeDst = &pPDDst->a[iPDDst];
3185
3186	# elif PGM_SHW_TYPE == PGM_TYPE_AMD64
3187	const unsigned iPdpt = (GCPtrPage >> X86_PDPT_SHIFT) & X86_PDPT_MASK_AMD64;
3188	const unsigned iPDDst = (GCPtrPage >> SHW_PD_SHIFT) & SHW_PD_MASK;
3189	PX86PDPAE pPDDst = NULL; /* initialized to shut up gcc */
3190	PX86PDPT pPdptDst= NULL; /* initialized to shut up gcc */
3191	rc = pgmShwGetLongModePDPtr(pVCpu, GCPtrPage, NULL, &pPdptDst, &pPDDst);
3192	AssertRCSuccessReturn(rc, rc);
3193	Assert(pPDDst);
3194	PSHWPDE pPdeDst = &pPDDst->a[iPDDst];
3195
3196	/* Fetch the pgm pool shadow descriptor. */
3197	PPGMPOOLPAGE pShwPde = pgmPoolGetPage(pPool, pPdptDst->a[iPdpt].u & X86_PDPE_PG_MASK);
3198	Assert(pShwPde);
3199
3200	# elif PGM_SHW_TYPE == PGM_TYPE_EPT
3201	const unsigned iPdpt = (GCPtrPage >> EPT_PDPT_SHIFT) & EPT_PDPT_MASK;
3202	const unsigned iPDDst = ((GCPtrPage >> SHW_PD_SHIFT) & SHW_PD_MASK);
3203	PEPTPD pPDDst;
3204	PEPTPDPT pPdptDst;
3205
3206	rc = pgmShwGetEPTPDPtr(pVCpu, GCPtrPage, &pPdptDst, &pPDDst);
3207	if (rc != VINF_SUCCESS)
3208	{
3209	STAM_PROFILE_STOP(&pVCpu->pgm.s.CTX_SUFF(pStats)->CTX_MID_Z(Stat,SyncPT), a);
3210	AssertRC(rc);
3211	return rc;
3212	}
3213	Assert(pPDDst);
3214	PSHWPDE pPdeDst = &pPDDst->a[iPDDst];
3215
3216	/* Fetch the pgm pool shadow descriptor. */
3217	PPGMPOOLPAGE pShwPde = pgmPoolGetPage(pPool, pPdptDst->a[iPdpt].u & EPT_PDPTE_PG_MASK);
3218	Assert(pShwPde);
3219	# endif
3220	SHWPDE PdeDst = *pPdeDst;
3221
3222	Assert(!(PdeDst.u & PGM_PDFLAGS_MAPPING));
3223	Assert(!PdeDst.n.u1Present); /* We're only supposed to call SyncPT on PDE!P and conflicts.*/
3224
3225	# if defined(PGM_WITH_LARGE_PAGES) && PGM_SHW_TYPE != PGM_TYPE_32BIT && PGM_SHW_TYPE != PGM_TYPE_PAE
3226	if ( BTH_IS_NP_ACTIVE(pVM)
3227	&& !VM_IS_NEM_ENABLED(pVM)) /** @todo NEM: Large page support. */
3228	{
3229	/* Check if we allocated a big page before for this 2 MB range. */
3230	PPGMPAGE pPage;
3231	rc = pgmPhysGetPageEx(pVM, PGM_A20_APPLY(pVCpu, GCPtrPage & X86_PDE2M_PAE_PG_MASK), &pPage);
3232	if (RT_SUCCESS(rc))
3233	{
3234	RTHCPHYS HCPhys = NIL_RTHCPHYS;
3235	if (PGM_PAGE_GET_PDE_TYPE(pPage) == PGM_PAGE_PDE_TYPE_PDE)
3236	{
3237	if (PGM_A20_IS_ENABLED(pVCpu))
3238	{
3239	STAM_REL_COUNTER_INC(&pVM->pgm.s.StatLargePageReused);
3240	AssertRelease(PGM_PAGE_GET_STATE(pPage) == PGM_PAGE_STATE_ALLOCATED);
3241	HCPhys = PGM_PAGE_GET_HCPHYS(pPage);
3242	}
3243	else
3244	{
3245	PGM_PAGE_SET_PDE_TYPE(pVM, pPage, PGM_PAGE_PDE_TYPE_PDE_DISABLED);
3246	pVM->pgm.s.cLargePagesDisabled++;
3247	}
3248	}
3249	else if ( PGM_PAGE_GET_PDE_TYPE(pPage) == PGM_PAGE_PDE_TYPE_PDE_DISABLED
3250	&& PGM_A20_IS_ENABLED(pVCpu))
3251	{
3252	/* Recheck the entire 2 MB range to see if we can use it again as a large page. */
3253	rc = pgmPhysRecheckLargePage(pVM, GCPtrPage, pPage);
3254	if (RT_SUCCESS(rc))
3255	{
3256	Assert(PGM_PAGE_GET_STATE(pPage) == PGM_PAGE_STATE_ALLOCATED);
3257	Assert(PGM_PAGE_GET_PDE_TYPE(pPage) == PGM_PAGE_PDE_TYPE_PDE);
3258	HCPhys = PGM_PAGE_GET_HCPHYS(pPage);
3259	}
3260	}
3261	else if ( PGMIsUsingLargePages(pVM)
3262	&& PGM_A20_IS_ENABLED(pVCpu))
3263	{
3264	rc = pgmPhysAllocLargePage(pVM, GCPtrPage);
3265	if (RT_SUCCESS(rc))
3266	{
3267	Assert(PGM_PAGE_GET_STATE(pPage) == PGM_PAGE_STATE_ALLOCATED);
3268	Assert(PGM_PAGE_GET_PDE_TYPE(pPage) == PGM_PAGE_PDE_TYPE_PDE);
3269	HCPhys = PGM_PAGE_GET_HCPHYS(pPage);
3270	}
3271	else
3272	LogFlow(("pgmPhysAllocLargePage failed with %Rrc\n", rc));
3273	}
3274
3275	if (HCPhys != NIL_RTHCPHYS)
3276	{
3277	PdeDst.u &= X86_PDE_AVL_MASK;
3278	PdeDst.u \|= HCPhys;
3279	PdeDst.n.u1Present = 1;
3280	PdeDst.n.u1Write = 1;
3281	PdeDst.b.u1Size = 1;
3282	# if PGM_SHW_TYPE == PGM_TYPE_EPT
3283	PdeDst.n.u1Execute = 1;
3284	PdeDst.b.u1IgnorePAT = 1;
3285	PdeDst.b.u3EMT = VMX_EPT_MEMTYPE_WB;
3286	# else
3287	PdeDst.n.u1User = 1;
3288	# endif
3289	ASMAtomicWriteSize(pPdeDst, PdeDst.u);
3290
3291	Log(("SyncPT: Use large page at %RGp PDE=%RX64\n", GCPtrPage, PdeDst.u));
3292	/* Add a reference to the first page only. */
3293	PGM_BTH_NAME(SyncPageWorkerTrackAddref)(pVCpu, pShwPde, PGM_PAGE_GET_TRACKING(pPage), pPage, iPDDst);
3294
3295	STAM_PROFILE_STOP(&pVCpu->pgm.s.CTX_SUFF(pStats)->CTX_MID_Z(Stat,SyncPT), a);
3296	return VINF_SUCCESS;
3297	}
3298	}
3299	}
3300	# endif /* HC_ARCH_BITS == 64 */
3301
3302	/*
3303	* Allocate & map the page table.
3304	*/
3305	PSHWPT pPTDst;
3306	PPGMPOOLPAGE pShwPage;
3307	RTGCPHYS GCPhys;
3308
3309	/* Virtual address = physical address */
3310	GCPhys = PGM_A20_APPLY(pVCpu, GCPtrPage & X86_PAGE_4K_BASE_MASK);
3311	rc = pgmPoolAlloc(pVM, GCPhys & ~(RT_BIT_64(SHW_PD_SHIFT) - 1), BTH_PGMPOOLKIND_PT_FOR_PT, PGMPOOLACCESS_DONTCARE,
3312	PGM_A20_IS_ENABLED(pVCpu), pShwPde->idx, iPDDst, false /fLockPage/,
3313	&pShwPage);
3314	if ( rc == VINF_SUCCESS
3315	\|\| rc == VINF_PGM_CACHED_PAGE)
3316	pPTDst = (PSHWPT)PGMPOOL_PAGE_2_PTR_V2(pVM, pVCpu, pShwPage);
3317	else
3318	{
3319	STAM_PROFILE_STOP(&pVCpu->pgm.s.CTX_SUFF(pStats)->CTX_MID_Z(Stat,SyncPT), a);
3320	AssertMsgFailedReturn(("rc=%Rrc\n", rc), RT_FAILURE_NP(rc) ? rc : VERR_IPE_UNEXPECTED_INFO_STATUS);
3321	}
3322
3323	if (rc == VINF_SUCCESS)
3324	{
3325	/* New page table; fully set it up. */
3326	Assert(pPTDst);
3327
3328	/* Mask away the page offset. */
3329	GCPtrPage &= ~(RTGCPTR)PAGE_OFFSET_MASK;
3330
3331	for (unsigned iPTDst = 0; iPTDst < RT_ELEMENTS(pPTDst->a); iPTDst++)
3332	{
3333	RTGCPTR GCPtrCurPage = PGM_A20_APPLY(pVCpu, (GCPtrPage & ~(RTGCPTR)(SHW_PT_MASK << SHW_PT_SHIFT))
3334	\| (iPTDst << PAGE_SHIFT));
3335
3336	PGM_BTH_NAME(SyncPageWorker)(pVCpu, &pPTDst->a[iPTDst], GCPtrCurPage, pShwPage, iPTDst);
3337	Log2(("SyncPage: 4K+ %RGv PteSrc:{P=1 RW=1 U=1} PteDst=%08llx%s\n",
3338	GCPtrCurPage,
3339	SHW_PTE_LOG64(pPTDst->a[iPTDst]),
3340	SHW_PTE_IS_TRACK_DIRTY(pPTDst->a[iPTDst]) ? " Track-Dirty" : ""));
3341
3342	if (RT_UNLIKELY(VM_FF_IS_PENDING(pVM, VM_FF_PGM_NO_MEMORY)))
3343	break;
3344	}
3345	}
3346	else
3347	rc = VINF_SUCCESS; /* Cached entry; assume it's still fully valid. */
3348
3349	/* Save the new PDE. */
3350	PdeDst.u &= X86_PDE_AVL_MASK;
3351	PdeDst.u \|= pShwPage->Core.Key;
3352	PdeDst.n.u1Present = 1;
3353	PdeDst.n.u1Write = 1;
3354	# if PGM_SHW_TYPE == PGM_TYPE_EPT
3355	PdeDst.n.u1Execute = 1;
3356	# else
3357	PdeDst.n.u1User = 1;
3358	PdeDst.n.u1Accessed = 1;
3359	# endif
3360	ASMAtomicWriteSize(pPdeDst, PdeDst.u);
3361
3362	STAM_PROFILE_STOP(&pVCpu->pgm.s.CTX_SUFF(pStats)->CTX_MID_Z(Stat,SyncPT), a);
3363	if (RT_FAILURE(rc))
3364	STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->CTX_MID_Z(Stat,SyncPTFailed));
3365	return rc;
3366
3367	#else
3368	NOREF(iPDSrc); NOREF(pPDSrc);
3369	AssertReleaseMsgFailed(("Shw=%d Gst=%d is not implemented!\n", PGM_SHW_TYPE, PGM_GST_TYPE));
3370	return VERR_PGM_NOT_USED_IN_MODE;
3371	#endif
3372	}
3373
3374
3375
3376	/**
3377	* Prefetch a page/set of pages.
3378	*
3379	* Typically used to sync commonly used pages before entering raw mode
3380	* after a CR3 reload.
3381	*
3382	* @returns VBox status code.
3383	* @param pVCpu The cross context virtual CPU structure.
3384	* @param GCPtrPage Page to invalidate.
3385	*/
3386	PGM_BTH_DECL(int, PrefetchPage)(PVMCPU pVCpu, RTGCPTR GCPtrPage)
3387	{
3388	#if ( PGM_GST_TYPE == PGM_TYPE_32BIT \
3389	\|\| PGM_GST_TYPE == PGM_TYPE_REAL \
3390	\|\| PGM_GST_TYPE == PGM_TYPE_PROT \
3391	\|\| PGM_GST_TYPE == PGM_TYPE_PAE \
3392	\|\| PGM_GST_TYPE == PGM_TYPE_AMD64 ) \
3393	&& PGM_SHW_TYPE != PGM_TYPE_NESTED \
3394	&& PGM_SHW_TYPE != PGM_TYPE_EPT
3395
3396	/*
3397	* Check that all Guest levels thru the PDE are present, getting the
3398	* PD and PDE in the processes.
3399	*/
3400	int rc = VINF_SUCCESS;
3401	# if PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE)
3402	# if PGM_GST_TYPE == PGM_TYPE_32BIT
3403	const unsigned iPDSrc = (uint32_t)GCPtrPage >> GST_PD_SHIFT;
3404	PGSTPD pPDSrc = pgmGstGet32bitPDPtr(pVCpu);
3405	# elif PGM_GST_TYPE == PGM_TYPE_PAE
3406	unsigned iPDSrc;
3407	X86PDPE PdpeSrc;
3408	PGSTPD pPDSrc = pgmGstGetPaePDPtr(pVCpu, GCPtrPage, &iPDSrc, &PdpeSrc);
3409	if (!pPDSrc)
3410	return VINF_SUCCESS; /* not present */
3411	# elif PGM_GST_TYPE == PGM_TYPE_AMD64
3412	unsigned iPDSrc;
3413	PX86PML4E pPml4eSrc;
3414	X86PDPE PdpeSrc;
3415	PGSTPD pPDSrc = pgmGstGetLongModePDPtr(pVCpu, GCPtrPage, &pPml4eSrc, &PdpeSrc, &iPDSrc);
3416	if (!pPDSrc)
3417	return VINF_SUCCESS; /* not present */
3418	# endif
3419	const GSTPDE PdeSrc = pPDSrc->a[iPDSrc];
3420	# else
3421	PGSTPD pPDSrc = NULL;
3422	const unsigned iPDSrc = 0;
3423	GSTPDE PdeSrc;
3424
3425	PdeSrc.u = 0; /* faked so we don't have to #ifdef everything */
3426	PdeSrc.n.u1Present = 1;
3427	PdeSrc.n.u1Write = 1;
3428	PdeSrc.n.u1Accessed = 1;
3429	PdeSrc.n.u1User = 1;
3430	# endif
3431
3432	if (PdeSrc.n.u1Present && PdeSrc.n.u1Accessed)
3433	{
3434	PVM pVM = pVCpu->CTX_SUFF(pVM);
3435	pgmLock(pVM);
3436
3437	# if PGM_SHW_TYPE == PGM_TYPE_32BIT
3438	const X86PDE PdeDst = pgmShwGet32BitPDE(pVCpu, GCPtrPage);
3439	# elif PGM_SHW_TYPE == PGM_TYPE_PAE
3440	const unsigned iPDDst = ((GCPtrPage >> SHW_PD_SHIFT) & SHW_PD_MASK);
3441	PX86PDPAE pPDDst;
3442	X86PDEPAE PdeDst;
3443	# if PGM_GST_TYPE != PGM_TYPE_PAE
3444	X86PDPE PdpeSrc;
3445
3446	/* Fake PDPT entry; access control handled on the page table level, so allow everything. */
3447	PdpeSrc.u = X86_PDPE_P; /* rw/us are reserved for PAE pdpte's; accessed bit causes invalid VT-x guest state errors */
3448	# endif
3449	rc = pgmShwSyncPaePDPtr(pVCpu, GCPtrPage, PdpeSrc.u, &pPDDst);
3450	if (rc != VINF_SUCCESS)
3451	{
3452	pgmUnlock(pVM);
3453	AssertRC(rc);
3454	return rc;
3455	}
3456	Assert(pPDDst);
3457	PdeDst = pPDDst->a[iPDDst];
3458
3459	# elif PGM_SHW_TYPE == PGM_TYPE_AMD64
3460	const unsigned iPDDst = ((GCPtrPage >> SHW_PD_SHIFT) & SHW_PD_MASK);
3461	PX86PDPAE pPDDst;
3462	X86PDEPAE PdeDst;
3463
3464	# if PGM_GST_TYPE == PGM_TYPE_PROT
3465	/* AMD-V nested paging */
3466	X86PML4E Pml4eSrc;
3467	X86PDPE PdpeSrc;
3468	PX86PML4E pPml4eSrc = &Pml4eSrc;
3469
3470	/* Fake PML4 & PDPT entry; access control handled on the page table level, so allow everything. */
3471	Pml4eSrc.u = X86_PML4E_P \| X86_PML4E_RW \| X86_PML4E_US \| X86_PML4E_A;
3472	PdpeSrc.u = X86_PDPE_P \| X86_PDPE_RW \| X86_PDPE_US \| X86_PDPE_A;
3473	# endif
3474
3475	rc = pgmShwSyncLongModePDPtr(pVCpu, GCPtrPage, pPml4eSrc->u, PdpeSrc.u, &pPDDst);
3476	if (rc != VINF_SUCCESS)
3477	{
3478	pgmUnlock(pVM);
3479	AssertRC(rc);
3480	return rc;
3481	}
3482	Assert(pPDDst);
3483	PdeDst = pPDDst->a[iPDDst];
3484	# endif
3485	if (!(PdeDst.u & PGM_PDFLAGS_MAPPING))
3486	{
3487	if (!PdeDst.n.u1Present)
3488	{
3489	/** @todo r=bird: This guy will set the A bit on the PDE,
3490	* probably harmless. */
3491	rc = PGM_BTH_NAME(SyncPT)(pVCpu, iPDSrc, pPDSrc, GCPtrPage);
3492	}
3493	else
3494	{
3495	/* Note! We used to sync PGM_SYNC_NR_PAGES pages, which triggered assertions in CSAM, because
3496	* R/W attributes of nearby pages were reset. Not sure how that could happen. Anyway, it
3497	* makes no sense to prefetch more than one page.
3498	*/
3499	rc = PGM_BTH_NAME(SyncPage)(pVCpu, PdeSrc, GCPtrPage, 1, 0);
3500	if (RT_SUCCESS(rc))
3501	rc = VINF_SUCCESS;
3502	}
3503	}
3504	pgmUnlock(pVM);
3505	}
3506	return rc;
3507
3508	#elif PGM_SHW_TYPE == PGM_TYPE_NESTED \|\| PGM_SHW_TYPE == PGM_TYPE_EPT
3509	NOREF(pVCpu); NOREF(GCPtrPage);
3510	return VINF_SUCCESS; /* ignore */
3511	#else
3512	AssertCompile(0);
3513	#endif
3514	}
3515
3516
3517
3518
3519	/**
3520	* Syncs a page during a PGMVerifyAccess() call.
3521	*
3522	* @returns VBox status code (informational included).
3523	* @param pVCpu The cross context virtual CPU structure.
3524	* @param GCPtrPage The address of the page to sync.
3525	* @param fPage The effective guest page flags.
3526	* @param uErr The trap error code.
3527	* @remarks This will normally never be called on invalid guest page
3528	* translation entries.
3529	*/
3530	PGM_BTH_DECL(int, VerifyAccessSyncPage)(PVMCPU pVCpu, RTGCPTR GCPtrPage, unsigned fPage, unsigned uErr)
3531	{
3532	PVM pVM = pVCpu->CTX_SUFF(pVM); NOREF(pVM);
3533
3534	LogFlow(("VerifyAccessSyncPage: GCPtrPage=%RGv fPage=%#x uErr=%#x\n", GCPtrPage, fPage, uErr));
3535	RT_NOREF_PV(GCPtrPage); RT_NOREF_PV(fPage); RT_NOREF_PV(uErr);
3536
3537	Assert(!pVM->pgm.s.fNestedPaging);
3538	#if ( PGM_GST_TYPE == PGM_TYPE_32BIT \
3539	\|\| PGM_GST_TYPE == PGM_TYPE_REAL \
3540	\|\| PGM_GST_TYPE == PGM_TYPE_PROT \
3541	\|\| PGM_GST_TYPE == PGM_TYPE_PAE \
3542	\|\| PGM_GST_TYPE == PGM_TYPE_AMD64 ) \
3543	&& PGM_SHW_TYPE != PGM_TYPE_NESTED \
3544	&& PGM_SHW_TYPE != PGM_TYPE_EPT
3545
3546	# ifdef VBOX_WITH_RAW_MODE_NOT_R0
3547	if (!(fPage & X86_PTE_US))
3548	{
3549	/*
3550	* Mark this page as safe.
3551	*/
3552	/** @todo not correct for pages that contain both code and data!! */
3553	Log(("CSAMMarkPage %RGv; scanned=%d\n", GCPtrPage, true));
3554	CSAMMarkPage(pVM, GCPtrPage, true);
3555	}
3556	# endif
3557
3558	/*
3559	* Get guest PD and index.
3560	*/
3561	/** @todo Performance: We've done all this a jiffy ago in the
3562	* PGMGstGetPage call. */
3563	# if PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE)
3564	# if PGM_GST_TYPE == PGM_TYPE_32BIT
3565	const unsigned iPDSrc = (uint32_t)GCPtrPage >> GST_PD_SHIFT;
3566	PGSTPD pPDSrc = pgmGstGet32bitPDPtr(pVCpu);
3567
3568	# elif PGM_GST_TYPE == PGM_TYPE_PAE
3569	unsigned iPDSrc = 0;
3570	X86PDPE PdpeSrc;
3571	PGSTPD pPDSrc = pgmGstGetPaePDPtr(pVCpu, GCPtrPage, &iPDSrc, &PdpeSrc);
3572	if (RT_UNLIKELY(!pPDSrc))
3573	{
3574	Log(("PGMVerifyAccess: access violation for %RGv due to non-present PDPTR\n", GCPtrPage));
3575	return VINF_EM_RAW_GUEST_TRAP;
3576	}
3577
3578	# elif PGM_GST_TYPE == PGM_TYPE_AMD64
3579	unsigned iPDSrc = 0; /* shut up gcc */
3580	PX86PML4E pPml4eSrc = NULL; /* ditto */
3581	X86PDPE PdpeSrc;
3582	PGSTPD pPDSrc = pgmGstGetLongModePDPtr(pVCpu, GCPtrPage, &pPml4eSrc, &PdpeSrc, &iPDSrc);
3583	if (RT_UNLIKELY(!pPDSrc))
3584	{
3585	Log(("PGMVerifyAccess: access violation for %RGv due to non-present PDPTR\n", GCPtrPage));
3586	return VINF_EM_RAW_GUEST_TRAP;
3587	}
3588	# endif
3589
3590	# else /* !PGM_WITH_PAGING */
3591	PGSTPD pPDSrc = NULL;
3592	const unsigned iPDSrc = 0;
3593	# endif /* !PGM_WITH_PAGING */
3594	int rc = VINF_SUCCESS;
3595
3596	pgmLock(pVM);
3597
3598	/*
3599	* First check if the shadow pd is present.
3600	*/
3601	# if PGM_SHW_TYPE == PGM_TYPE_32BIT
3602	PX86PDE pPdeDst = pgmShwGet32BitPDEPtr(pVCpu, GCPtrPage);
3603
3604	# elif PGM_SHW_TYPE == PGM_TYPE_PAE
3605	PX86PDEPAE pPdeDst;
3606	const unsigned iPDDst = ((GCPtrPage >> SHW_PD_SHIFT) & SHW_PD_MASK);
3607	PX86PDPAE pPDDst;
3608	# if PGM_GST_TYPE != PGM_TYPE_PAE
3609	/* Fake PDPT entry; access control handled on the page table level, so allow everything. */
3610	X86PDPE PdpeSrc;
3611	PdpeSrc.u = X86_PDPE_P; /* rw/us are reserved for PAE pdpte's; accessed bit causes invalid VT-x guest state errors */
3612	# endif
3613	rc = pgmShwSyncPaePDPtr(pVCpu, GCPtrPage, PdpeSrc.u, &pPDDst);
3614	if (rc != VINF_SUCCESS)
3615	{
3616	pgmUnlock(pVM);
3617	AssertRC(rc);
3618	return rc;
3619	}
3620	Assert(pPDDst);
3621	pPdeDst = &pPDDst->a[iPDDst];
3622
3623	# elif PGM_SHW_TYPE == PGM_TYPE_AMD64
3624	const unsigned iPDDst = ((GCPtrPage >> SHW_PD_SHIFT) & SHW_PD_MASK);
3625	PX86PDPAE pPDDst;
3626	PX86PDEPAE pPdeDst;
3627
3628	# if PGM_GST_TYPE == PGM_TYPE_PROT
3629	/* AMD-V nested paging: Fake PML4 & PDPT entry; access control handled on the page table level, so allow everything. */
3630	X86PML4E Pml4eSrc;
3631	X86PDPE PdpeSrc;
3632	PX86PML4E pPml4eSrc = &Pml4eSrc;
3633	Pml4eSrc.u = X86_PML4E_P \| X86_PML4E_RW \| X86_PML4E_US \| X86_PML4E_A;
3634	PdpeSrc.u = X86_PDPE_P \| X86_PDPE_RW \| X86_PDPE_US \| X86_PDPE_A;
3635	# endif
3636
3637	rc = pgmShwSyncLongModePDPtr(pVCpu, GCPtrPage, pPml4eSrc->u, PdpeSrc.u, &pPDDst);
3638	if (rc != VINF_SUCCESS)
3639	{
3640	pgmUnlock(pVM);
3641	AssertRC(rc);
3642	return rc;
3643	}
3644	Assert(pPDDst);
3645	pPdeDst = &pPDDst->a[iPDDst];
3646	# endif
3647
3648	if (!pPdeDst->n.u1Present)
3649	{
3650	rc = PGM_BTH_NAME(SyncPT)(pVCpu, iPDSrc, pPDSrc, GCPtrPage);
3651	if (rc != VINF_SUCCESS)
3652	{
3653	PGM_DYNMAP_UNUSED_HINT(pVCpu, pPdeDst);
3654	pgmUnlock(pVM);
3655	AssertRC(rc);
3656	return rc;
3657	}
3658	}
3659
3660	# if PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE)
3661	/* Check for dirty bit fault */
3662	rc = PGM_BTH_NAME(CheckDirtyPageFault)(pVCpu, uErr, pPdeDst, &pPDSrc->a[iPDSrc], GCPtrPage);
3663	if (rc == VINF_PGM_HANDLED_DIRTY_BIT_FAULT)
3664	Log(("PGMVerifyAccess: success (dirty)\n"));
3665	else
3666	# endif
3667	{
3668	# if PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE)
3669	GSTPDE PdeSrc = pPDSrc->a[iPDSrc];
3670	# else
3671	GSTPDE PdeSrc;
3672	PdeSrc.u = 0; /* faked so we don't have to #ifdef everything */
3673	PdeSrc.n.u1Present = 1;
3674	PdeSrc.n.u1Write = 1;
3675	PdeSrc.n.u1Accessed = 1;
3676	PdeSrc.n.u1User = 1;
3677	# endif
3678
3679	Assert(rc != VINF_EM_RAW_GUEST_TRAP);
3680	if (uErr & X86_TRAP_PF_US)
3681	STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->CTX_MID_Z(Stat,PageOutOfSyncUser));
3682	else /* supervisor */
3683	STAM_COUNTER_INC(&pVCpu->pgm.s.CTX_SUFF(pStats)->CTX_MID_Z(Stat,PageOutOfSyncSupervisor));
3684
3685	rc = PGM_BTH_NAME(SyncPage)(pVCpu, PdeSrc, GCPtrPage, 1, 0);
3686	if (RT_SUCCESS(rc))
3687	{
3688	/* Page was successfully synced */
3689	Log2(("PGMVerifyAccess: success (sync)\n"));
3690	rc = VINF_SUCCESS;
3691	}
3692	else
3693	{
3694	Log(("PGMVerifyAccess: access violation for %RGv rc=%Rrc\n", GCPtrPage, rc));
3695	rc = VINF_EM_RAW_GUEST_TRAP;
3696	}
3697	}
3698	PGM_DYNMAP_UNUSED_HINT(pVCpu, pPdeDst);
3699	pgmUnlock(pVM);
3700	return rc;
3701
3702	#else /* PGM_SHW_TYPE == PGM_TYPE_EPT \|\| PGM_SHW_TYPE == PGM_TYPE_NESTED */
3703
3704	AssertReleaseMsgFailed(("Shw=%d Gst=%d is not implemented!\n", PGM_GST_TYPE, PGM_SHW_TYPE));
3705	return VERR_PGM_NOT_USED_IN_MODE;
3706	#endif /* PGM_SHW_TYPE == PGM_TYPE_EPT \|\| PGM_SHW_TYPE == PGM_TYPE_NESTED */
3707	}
3708
3709
3710	/**
3711	* Syncs the paging hierarchy starting at CR3.
3712	*
3713	* @returns VBox status code, R0/RC may return VINF_PGM_SYNC_CR3, no other
3714	* informational status codes.
3715	* @retval VERR_PGM_NO_HYPERVISOR_ADDRESS in raw-mode when we're unable to map
3716	* the VMM into guest context.
3717	* @param pVCpu The cross context virtual CPU structure.
3718	* @param cr0 Guest context CR0 register.
3719	* @param cr3 Guest context CR3 register. Not subjected to the A20
3720	* mask.
3721	* @param cr4 Guest context CR4 register.
3722	* @param fGlobal Including global page directories or not
3723	*/
3724	PGM_BTH_DECL(int, SyncCR3)(PVMCPU pVCpu, uint64_t cr0, uint64_t cr3, uint64_t cr4, bool fGlobal)
3725	{
3726	PVM pVM = pVCpu->CTX_SUFF(pVM); NOREF(pVM);
3727	NOREF(cr0); NOREF(cr3); NOREF(cr4); NOREF(fGlobal);
3728
3729	LogFlow(("SyncCR3 FF=%d fGlobal=%d\n", !!VMCPU_FF_IS_SET(pVCpu, VMCPU_FF_PGM_SYNC_CR3), fGlobal));
3730
3731	#if PGM_SHW_TYPE != PGM_TYPE_NESTED && PGM_SHW_TYPE != PGM_TYPE_EPT
3732
3733	pgmLock(pVM);
3734
3735	# ifdef PGMPOOL_WITH_OPTIMIZED_DIRTY_PT
3736	PPGMPOOL pPool = pVM->pgm.s.CTX_SUFF(pPool);
3737	if (pPool->cDirtyPages)
3738	pgmPoolResetDirtyPages(pVM);
3739	# endif
3740
3741	/*
3742	* Update page access handlers.
3743	* The virtual are always flushed, while the physical are only on demand.
3744	* WARNING: We are incorrectly not doing global flushing on Virtual Handler updates. We'll
3745	* have to look into that later because it will have a bad influence on the performance.
3746	* @note SvL: There's no need for that. Just invalidate the virtual range(s).
3747	* bird: Yes, but that won't work for aliases.
3748	*/
3749	/** @todo this MUST go away. See @bugref{1557}. */
3750	STAM_PROFILE_START(&pVCpu->pgm.s.CTX_SUFF(pStats)->CTX_MID_Z(Stat,SyncCR3Handlers), h);
3751	PGM_GST_NAME(HandlerVirtualUpdate)(pVM, cr4);
3752	STAM_PROFILE_STOP(&pVCpu->pgm.s.CTX_SUFF(pStats)->CTX_MID_Z(Stat,SyncCR3Handlers), h);
3753	pgmUnlock(pVM);
3754	#endif /* !NESTED && !EPT */
3755
3756	#if PGM_SHW_TYPE == PGM_TYPE_NESTED \|\| PGM_SHW_TYPE == PGM_TYPE_EPT
3757	/*
3758	* Nested / EPT - almost no work.
3759	*/
3760	Assert(!pgmMapAreMappingsEnabled(pVM));
3761	return VINF_SUCCESS;
3762
3763	#elif PGM_SHW_TYPE == PGM_TYPE_AMD64
3764	/*
3765	* AMD64 (Shw & Gst) - No need to check all paging levels; we zero
3766	* out the shadow parts when the guest modifies its tables.
3767	*/
3768	Assert(!pgmMapAreMappingsEnabled(pVM));
3769	return VINF_SUCCESS;
3770
3771	#else /* PGM_SHW_TYPE != PGM_TYPE_NESTED && PGM_SHW_TYPE != PGM_TYPE_EPT && PGM_SHW_TYPE != PGM_TYPE_AMD64 */
3772
3773	# ifndef PGM_WITHOUT_MAPPINGS
3774	/*
3775	* Check for and resolve conflicts with our guest mappings if they
3776	* are enabled and not fixed.
3777	*/
3778	if (pgmMapAreMappingsFloating(pVM))
3779	{
3780	int rc = pgmMapResolveConflicts(pVM);
3781	Assert(rc == VINF_SUCCESS \|\| rc == VINF_PGM_SYNC_CR3);
3782	if (rc == VINF_SUCCESS)
3783	{ /* likely */ }
3784	else if (rc == VINF_PGM_SYNC_CR3)
3785	{
3786	LogFlow(("SyncCR3: detected conflict -> VINF_PGM_SYNC_CR3\n"));
3787	return VINF_PGM_SYNC_CR3;
3788	}
3789	else if (RT_FAILURE(rc))
3790	return rc;
3791	else
3792	AssertMsgFailed(("%Rrc\n", rc));
3793	}
3794	# else
3795	Assert(!pgmMapAreMappingsEnabled(pVM));
3796	# endif
3797	return VINF_SUCCESS;
3798	#endif /* PGM_SHW_TYPE != PGM_TYPE_NESTED && PGM_SHW_TYPE != PGM_TYPE_EPT && PGM_SHW_TYPE != PGM_TYPE_AMD64 */
3799	}
3800
3801
3802
3803
3804	#ifdef VBOX_STRICT
3805	# ifdef IN_RC
3806	# undef AssertMsgFailed
3807	# define AssertMsgFailed Log
3808	# endif
3809
3810	/**
3811	* Checks that the shadow page table is in sync with the guest one.
3812	*
3813	* @returns The number of errors.
3814	* @param pVCpu The cross context virtual CPU structure.
3815	* @param cr3 Guest context CR3 register.
3816	* @param cr4 Guest context CR4 register.
3817	* @param GCPtr Where to start. Defaults to 0.
3818	* @param cb How much to check. Defaults to everything.
3819	*/
3820	PGM_BTH_DECL(unsigned, AssertCR3)(PVMCPU pVCpu, uint64_t cr3, uint64_t cr4, RTGCPTR GCPtr, RTGCPTR cb)
3821	{
3822	NOREF(pVCpu); NOREF(cr3); NOREF(cr4); NOREF(GCPtr); NOREF(cb);
3823	#if PGM_SHW_TYPE == PGM_TYPE_NESTED \|\| PGM_SHW_TYPE == PGM_TYPE_EPT
3824	return 0;
3825	#else
3826	unsigned cErrors = 0;
3827	PVM pVM = pVCpu->CTX_SUFF(pVM);
3828	PPGMPOOL pPool = pVM->pgm.s.CTX_SUFF(pPool); NOREF(pPool);
3829
3830	# if PGM_GST_TYPE == PGM_TYPE_PAE
3831	/** @todo currently broken; crashes below somewhere */
3832	AssertFailed();
3833	# endif
3834
3835	# if PGM_GST_TYPE == PGM_TYPE_32BIT \
3836	\|\| PGM_GST_TYPE == PGM_TYPE_PAE \
3837	\|\| PGM_GST_TYPE == PGM_TYPE_AMD64
3838
3839	bool fBigPagesSupported = GST_IS_PSE_ACTIVE(pVCpu);
3840	PPGMCPU pPGM = &pVCpu->pgm.s;
3841	RTGCPHYS GCPhysGst; /* page address derived from the guest page tables. */
3842	RTHCPHYS HCPhysShw; /* page address derived from the shadow page tables. */
3843	# ifndef IN_RING0
3844	RTHCPHYS HCPhys; /* general usage. */
3845	# endif
3846	int rc;
3847
3848	/*
3849	* Check that the Guest CR3 and all its mappings are correct.
3850	*/
3851	AssertMsgReturn(pPGM->GCPhysCR3 == PGM_A20_APPLY(pVCpu, cr3 & GST_CR3_PAGE_MASK),
3852	("Invalid GCPhysCR3=%RGp cr3=%RGp\n", pPGM->GCPhysCR3, (RTGCPHYS)cr3),
3853	false);
3854	# if !defined(IN_RING0) && PGM_GST_TYPE != PGM_TYPE_AMD64
3855	# if PGM_GST_TYPE == PGM_TYPE_32BIT
3856	rc = PGMShwGetPage(pVCpu, (RTRCUINTPTR)pPGM->pGst32BitPdRC, NULL, &HCPhysShw);
3857	# else
3858	rc = PGMShwGetPage(pVCpu, (RTRCUINTPTR)pPGM->pGstPaePdptRC, NULL, &HCPhysShw);
3859	# endif
3860	AssertRCReturn(rc, 1);
3861	HCPhys = NIL_RTHCPHYS;
3862	rc = pgmRamGCPhys2HCPhys(pVM, PGM_A20_APPLY(pVCpu, cr3 & GST_CR3_PAGE_MASK), &HCPhys);
3863	AssertMsgReturn(HCPhys == HCPhysShw, ("HCPhys=%RHp HCPhyswShw=%RHp (cr3)\n", HCPhys, HCPhysShw), false);
3864	# if PGM_GST_TYPE == PGM_TYPE_32BIT && defined(IN_RING3)
3865	pgmGstGet32bitPDPtr(pVCpu);
3866	RTGCPHYS GCPhys;
3867	rc = PGMR3DbgR3Ptr2GCPhys(pVM->pUVM, pPGM->pGst32BitPdR3, &GCPhys);
3868	AssertRCReturn(rc, 1);
3869	AssertMsgReturn(PGM_A20_APPLY(pVCpu, cr3 & GST_CR3_PAGE_MASK) == GCPhys, ("GCPhys=%RGp cr3=%RGp\n", GCPhys, (RTGCPHYS)cr3), false);
3870	# endif
3871	# endif /* !IN_RING0 */
3872
3873	/*
3874	* Get and check the Shadow CR3.
3875	*/
3876	# if PGM_SHW_TYPE == PGM_TYPE_32BIT
3877	unsigned cPDEs = X86_PG_ENTRIES;
3878	unsigned cIncrement = X86_PG_ENTRIES * PAGE_SIZE;
3879	# elif PGM_SHW_TYPE == PGM_TYPE_PAE
3880	# if PGM_GST_TYPE == PGM_TYPE_32BIT
3881	unsigned cPDEs = X86_PG_PAE_ENTRIES * 4; /* treat it as a 2048 entry table. */
3882	# else
3883	unsigned cPDEs = X86_PG_PAE_ENTRIES;
3884	# endif
3885	unsigned cIncrement = X86_PG_PAE_ENTRIES * PAGE_SIZE;
3886	# elif PGM_SHW_TYPE == PGM_TYPE_AMD64
3887	unsigned cPDEs = X86_PG_PAE_ENTRIES;
3888	unsigned cIncrement = X86_PG_PAE_ENTRIES * PAGE_SIZE;
3889	# endif
3890	if (cb != ~(RTGCPTR)0)
3891	cPDEs = RT_MIN(cb >> SHW_PD_SHIFT, 1);
3892
3893	/** @todo call the other two PGMAssert() functions. /
3894
3895	# if PGM_GST_TYPE == PGM_TYPE_AMD64
3896	unsigned iPml4 = (GCPtr >> X86_PML4_SHIFT) & X86_PML4_MASK;
3897
3898	for (; iPml4 < X86_PG_PAE_ENTRIES; iPml4++)
3899	{
3900	PPGMPOOLPAGE pShwPdpt = NULL;
3901	PX86PML4E pPml4eSrc;
3902	PX86PML4E pPml4eDst;
3903	RTGCPHYS GCPhysPdptSrc;
3904
3905	pPml4eSrc = pgmGstGetLongModePML4EPtr(pVCpu, iPml4);
3906	pPml4eDst = pgmShwGetLongModePML4EPtr(pVCpu, iPml4);
3907
3908	/* Fetch the pgm pool shadow descriptor if the shadow pml4e is present. */
3909	if (!pPml4eDst->n.u1Present)
3910	{
3911	GCPtr += _2M * UINT64_C(512) * UINT64_C(512);
3912	continue;
3913	}
3914
3915	pShwPdpt = pgmPoolGetPage(pPool, pPml4eDst->u & X86_PML4E_PG_MASK);
3916	GCPhysPdptSrc = PGM_A20_APPLY(pVCpu, pPml4eSrc->u & X86_PML4E_PG_MASK);
3917
3918	if (pPml4eSrc->n.u1Present != pPml4eDst->n.u1Present)
3919	{
3920	AssertMsgFailed(("Present bit doesn't match! pPml4eDst.u=%#RX64 pPml4eSrc.u=%RX64\n", pPml4eDst->u, pPml4eSrc->u));
3921	GCPtr += _2M * UINT64_C(512) * UINT64_C(512);
3922	cErrors++;
3923	continue;
3924	}
3925
3926	if (GCPhysPdptSrc != pShwPdpt->GCPhys)
3927	{
3928	AssertMsgFailed(("Physical address doesn't match! iPml4 %d pPml4eDst.u=%#RX64 pPml4eSrc.u=%RX64 Phys %RX64 vs %RX64\n", iPml4, pPml4eDst->u, pPml4eSrc->u, pShwPdpt->GCPhys, GCPhysPdptSrc));
3929	GCPtr += _2M * UINT64_C(512) * UINT64_C(512);
3930	cErrors++;
3931	continue;
3932	}
3933
3934	if ( pPml4eDst->n.u1User != pPml4eSrc->n.u1User
3935	\|\| pPml4eDst->n.u1Write != pPml4eSrc->n.u1Write
3936	\|\| pPml4eDst->n.u1NoExecute != pPml4eSrc->n.u1NoExecute)
3937	{
3938	AssertMsgFailed(("User/Write/NoExec bits don't match! pPml4eDst.u=%#RX64 pPml4eSrc.u=%RX64\n", pPml4eDst->u, pPml4eSrc->u));
3939	GCPtr += _2M * UINT64_C(512) * UINT64_C(512);
3940	cErrors++;
3941	continue;
3942	}
3943	# else /* PGM_GST_TYPE != PGM_TYPE_AMD64 */
3944	{
3945	# endif /* PGM_GST_TYPE != PGM_TYPE_AMD64 */
3946
3947	# if PGM_GST_TYPE == PGM_TYPE_AMD64 \|\| PGM_GST_TYPE == PGM_TYPE_PAE
3948	/*
3949	* Check the PDPTEs too.
3950	*/
3951	unsigned iPdpt = (GCPtr >> SHW_PDPT_SHIFT) & SHW_PDPT_MASK;
3952
3953	for (;iPdpt <= SHW_PDPT_MASK; iPdpt++)
3954	{
3955	unsigned iPDSrc = 0; /* initialized to shut up gcc */
3956	PPGMPOOLPAGE pShwPde = NULL;
3957	PX86PDPE pPdpeDst;
3958	RTGCPHYS GCPhysPdeSrc;
3959	X86PDPE PdpeSrc;
3960	PdpeSrc.u = 0; /* initialized to shut up gcc 4.5 */
3961	# if PGM_GST_TYPE == PGM_TYPE_PAE
3962	PGSTPD pPDSrc = pgmGstGetPaePDPtr(pVCpu, GCPtr, &iPDSrc, &PdpeSrc);
3963	PX86PDPT pPdptDst = pgmShwGetPaePDPTPtr(pVCpu);
3964	# else
3965	PX86PML4E pPml4eSrcIgn;
3966	PX86PDPT pPdptDst;
3967	PX86PDPAE pPDDst;
3968	PGSTPD pPDSrc = pgmGstGetLongModePDPtr(pVCpu, GCPtr, &pPml4eSrcIgn, &PdpeSrc, &iPDSrc);
3969
3970	rc = pgmShwGetLongModePDPtr(pVCpu, GCPtr, NULL, &pPdptDst, &pPDDst);
3971	if (rc != VINF_SUCCESS)
3972	{
3973	AssertMsg(rc == VERR_PAGE_DIRECTORY_PTR_NOT_PRESENT, ("Unexpected rc=%Rrc\n", rc));
3974	GCPtr += 512 * _2M;
3975	continue; /* next PDPTE */
3976	}
3977	Assert(pPDDst);
3978	# endif
3979	Assert(iPDSrc == 0);
3980
3981	pPdpeDst = &pPdptDst->a[iPdpt];
3982
3983	if (!pPdpeDst->n.u1Present)
3984	{
3985	GCPtr += 512 * _2M;
3986	continue; /* next PDPTE */
3987	}
3988
3989	pShwPde = pgmPoolGetPage(pPool, pPdpeDst->u & X86_PDPE_PG_MASK);
3990	GCPhysPdeSrc = PGM_A20_APPLY(pVCpu, PdpeSrc.u & X86_PDPE_PG_MASK);
3991
3992	if (pPdpeDst->n.u1Present != PdpeSrc.n.u1Present)
3993	{
3994	AssertMsgFailed(("Present bit doesn't match! pPdpeDst.u=%#RX64 pPdpeSrc.u=%RX64\n", pPdpeDst->u, PdpeSrc.u));
3995	GCPtr += 512 * _2M;
3996	cErrors++;
3997	continue;
3998	}
3999
4000	if (GCPhysPdeSrc != pShwPde->GCPhys)
4001	{
4002	# if PGM_GST_TYPE == PGM_TYPE_AMD64
4003	AssertMsgFailed(("Physical address doesn't match! iPml4 %d iPdpt %d pPdpeDst.u=%#RX64 pPdpeSrc.u=%RX64 Phys %RX64 vs %RX64\n", iPml4, iPdpt, pPdpeDst->u, PdpeSrc.u, pShwPde->GCPhys, GCPhysPdeSrc));
4004	# else
4005	AssertMsgFailed(("Physical address doesn't match! iPdpt %d pPdpeDst.u=%#RX64 pPdpeSrc.u=%RX64 Phys %RX64 vs %RX64\n", iPdpt, pPdpeDst->u, PdpeSrc.u, pShwPde->GCPhys, GCPhysPdeSrc));
4006	# endif
4007	GCPtr += 512 * _2M;
4008	cErrors++;
4009	continue;
4010	}
4011
4012	# if PGM_GST_TYPE == PGM_TYPE_AMD64
4013	if ( pPdpeDst->lm.u1User != PdpeSrc.lm.u1User
4014	\|\| pPdpeDst->lm.u1Write != PdpeSrc.lm.u1Write
4015	\|\| pPdpeDst->lm.u1NoExecute != PdpeSrc.lm.u1NoExecute)
4016	{
4017	AssertMsgFailed(("User/Write/NoExec bits don't match! pPdpeDst.u=%#RX64 pPdpeSrc.u=%RX64\n", pPdpeDst->u, PdpeSrc.u));
4018	GCPtr += 512 * _2M;
4019	cErrors++;
4020	continue;
4021	}
4022	# endif
4023
4024	# else /* PGM_GST_TYPE != PGM_TYPE_AMD64 && PGM_GST_TYPE != PGM_TYPE_PAE */
4025	{
4026	# endif /* PGM_GST_TYPE != PGM_TYPE_AMD64 && PGM_GST_TYPE != PGM_TYPE_PAE */
4027	# if PGM_GST_TYPE == PGM_TYPE_32BIT
4028	GSTPD const *pPDSrc = pgmGstGet32bitPDPtr(pVCpu);
4029	# if PGM_SHW_TYPE == PGM_TYPE_32BIT
4030	PCX86PD pPDDst = pgmShwGet32BitPDPtr(pVCpu);
4031	# endif
4032	# endif /* PGM_GST_TYPE == PGM_TYPE_32BIT */
4033	/*
4034	* Iterate the shadow page directory.
4035	*/
4036	GCPtr = (GCPtr >> SHW_PD_SHIFT) << SHW_PD_SHIFT;
4037	unsigned iPDDst = (GCPtr >> SHW_PD_SHIFT) & SHW_PD_MASK;
4038
4039	for (;
4040	iPDDst < cPDEs;
4041	iPDDst++, GCPtr += cIncrement)
4042	{
4043	# if PGM_SHW_TYPE == PGM_TYPE_PAE
4044	const SHWPDE PdeDst = *pgmShwGetPaePDEPtr(pVCpu, GCPtr);
4045	# else
4046	const SHWPDE PdeDst = pPDDst->a[iPDDst];
4047	# endif
4048	if (PdeDst.u & PGM_PDFLAGS_MAPPING)
4049	{
4050	Assert(pgmMapAreMappingsEnabled(pVM));
4051	if ((PdeDst.u & X86_PDE_AVL_MASK) != PGM_PDFLAGS_MAPPING)
4052	{
4053	AssertMsgFailed(("Mapping shall only have PGM_PDFLAGS_MAPPING set! PdeDst.u=%#RX64\n", (uint64_t)PdeDst.u));
4054	cErrors++;
4055	continue;
4056	}
4057	}
4058	else if ( (PdeDst.u & X86_PDE_P)
4059	\|\| ((PdeDst.u & (X86_PDE_P \| PGM_PDFLAGS_TRACK_DIRTY)) == (X86_PDE_P \| PGM_PDFLAGS_TRACK_DIRTY))
4060	)
4061	{
4062	HCPhysShw = PdeDst.u & SHW_PDE_PG_MASK;
4063	PPGMPOOLPAGE pPoolPage = pgmPoolGetPage(pPool, HCPhysShw);
4064	if (!pPoolPage)
4065	{
4066	AssertMsgFailed(("Invalid page table address %RHp at %RGv! PdeDst=%#RX64\n",
4067	HCPhysShw, GCPtr, (uint64_t)PdeDst.u));
4068	cErrors++;
4069	continue;
4070	}
4071	const SHWPT pPTDst = (const SHWPT )PGMPOOL_PAGE_2_PTR_V2(pVM, pVCpu, pPoolPage);
4072
4073	if (PdeDst.u & (X86_PDE4M_PWT \| X86_PDE4M_PCD))
4074	{
4075	AssertMsgFailed(("PDE flags PWT and/or PCD is set at %RGv! These flags are not virtualized! PdeDst=%#RX64\n",
4076	GCPtr, (uint64_t)PdeDst.u));
4077	cErrors++;
4078	}
4079
4080	if (PdeDst.u & (X86_PDE4M_G \| X86_PDE4M_D))
4081	{
4082	AssertMsgFailed(("4K PDE reserved flags at %RGv! PdeDst=%#RX64\n",
4083	GCPtr, (uint64_t)PdeDst.u));
4084	cErrors++;
4085	}
4086
4087	const GSTPDE PdeSrc = pPDSrc->a[(iPDDst >> (GST_PD_SHIFT - SHW_PD_SHIFT)) & GST_PD_MASK];
4088	if (!PdeSrc.n.u1Present)
4089	{
4090	AssertMsgFailed(("Guest PDE at %RGv is not present! PdeDst=%#RX64 PdeSrc=%#RX64\n",
4091	GCPtr, (uint64_t)PdeDst.u, (uint64_t)PdeSrc.u));
4092	cErrors++;
4093	continue;
4094	}
4095
4096	if ( !PdeSrc.b.u1Size
4097	\|\| !fBigPagesSupported)
4098	{
4099	GCPhysGst = GST_GET_PDE_GCPHYS(PdeSrc);
4100	# if PGM_SHW_TYPE == PGM_TYPE_PAE && PGM_GST_TYPE == PGM_TYPE_32BIT
4101	GCPhysGst = PGM_A20_APPLY(pVCpu, GCPhysGst \| ((iPDDst & 1) * (PAGE_SIZE / 2)));
4102	# endif
4103	}
4104	else
4105	{
4106	# if PGM_GST_TYPE == PGM_TYPE_32BIT
4107	if (PdeSrc.u & X86_PDE4M_PG_HIGH_MASK)
4108	{
4109	AssertMsgFailed(("Guest PDE at %RGv is using PSE36 or similar! PdeSrc=%#RX64\n",
4110	GCPtr, (uint64_t)PdeSrc.u));
4111	cErrors++;
4112	continue;
4113	}
4114	# endif
4115	GCPhysGst = GST_GET_BIG_PDE_GCPHYS(pVM, PdeSrc);
4116	# if PGM_SHW_TYPE == PGM_TYPE_PAE && PGM_GST_TYPE == PGM_TYPE_32BIT
4117	GCPhysGst = PGM_A20_APPLY(pVCpu, GCPhysGst \| (GCPtr & RT_BIT(X86_PAGE_2M_SHIFT)));
4118	# endif
4119	}
4120
4121	if ( pPoolPage->enmKind
4122	!= (!PdeSrc.b.u1Size \|\| !fBigPagesSupported ? BTH_PGMPOOLKIND_PT_FOR_PT : BTH_PGMPOOLKIND_PT_FOR_BIG))
4123	{
4124	AssertMsgFailed(("Invalid shadow page table kind %d at %RGv! PdeSrc=%#RX64\n",
4125	pPoolPage->enmKind, GCPtr, (uint64_t)PdeSrc.u));
4126	cErrors++;
4127	}
4128
4129	PPGMPAGE pPhysPage = pgmPhysGetPage(pVM, GCPhysGst);
4130	if (!pPhysPage)
4131	{
4132	AssertMsgFailed(("Cannot find guest physical address %RGp in the PDE at %RGv! PdeSrc=%#RX64\n",
4133	GCPhysGst, GCPtr, (uint64_t)PdeSrc.u));
4134	cErrors++;
4135	continue;
4136	}
4137
4138	if (GCPhysGst != pPoolPage->GCPhys)
4139	{
4140	AssertMsgFailed(("GCPhysGst=%RGp != pPage->GCPhys=%RGp at %RGv\n",
4141	GCPhysGst, pPoolPage->GCPhys, GCPtr));
4142	cErrors++;
4143	continue;
4144	}
4145
4146	if ( !PdeSrc.b.u1Size
4147	\|\| !fBigPagesSupported)
4148	{
4149	/*
4150	* Page Table.
4151	*/
4152	const GSTPT *pPTSrc;
4153	rc = PGM_GCPHYS_2_PTR_V2(pVM, pVCpu, PGM_A20_APPLY(pVCpu, GCPhysGst & ~(RTGCPHYS)(PAGE_SIZE - 1)),
4154	&pPTSrc);
4155	if (RT_FAILURE(rc))
4156	{
4157	AssertMsgFailed(("Cannot map/convert guest physical address %RGp in the PDE at %RGv! PdeSrc=%#RX64\n",
4158	GCPhysGst, GCPtr, (uint64_t)PdeSrc.u));
4159	cErrors++;
4160	continue;
4161	}
4162	if ( (PdeSrc.u & (X86_PDE_P \| X86_PDE_US \| X86_PDE_RW/* \| X86_PDE_A*/))
4163	!= (PdeDst.u & (X86_PDE_P \| X86_PDE_US \| X86_PDE_RW/* \| X86_PDE_A*/)))
4164	{
4165	/// @todo We get here a lot on out-of-sync CR3 entries. The access handler should zap them to avoid false alarms here!
4166	// (This problem will go away when/if we shadow multiple CR3s.)
4167	AssertMsgFailed(("4K PDE flags mismatch at %RGv! PdeSrc=%#RX64 PdeDst=%#RX64\n",
4168	GCPtr, (uint64_t)PdeSrc.u, (uint64_t)PdeDst.u));
4169	cErrors++;
4170	continue;
4171	}
4172	if (PdeDst.u & PGM_PDFLAGS_TRACK_DIRTY)
4173	{
4174	AssertMsgFailed(("4K PDEs cannot have PGM_PDFLAGS_TRACK_DIRTY set! GCPtr=%RGv PdeDst=%#RX64\n",
4175	GCPtr, (uint64_t)PdeDst.u));
4176	cErrors++;
4177	continue;
4178	}
4179
4180	/* iterate the page table. */
4181	# if PGM_SHW_TYPE == PGM_TYPE_PAE && PGM_GST_TYPE == PGM_TYPE_32BIT
4182	/* Select the right PDE as we're emulating a 4kb page table with 2 shadow page tables. */
4183	const unsigned offPTSrc = ((GCPtr >> SHW_PD_SHIFT) & 1) * 512;
4184	# else
4185	const unsigned offPTSrc = 0;
4186	# endif
4187	for (unsigned iPT = 0, off = 0;
4188	iPT < RT_ELEMENTS(pPTDst->a);
4189	iPT++, off += PAGE_SIZE)
4190	{
4191	const SHWPTE PteDst = pPTDst->a[iPT];
4192
4193	/* skip not-present and dirty tracked entries. */
4194	if (!(SHW_PTE_GET_U(PteDst) & (X86_PTE_P \| PGM_PTFLAGS_TRACK_DIRTY))) /** @todo deal with ALL handlers and CSAM !P pages! */
4195	continue;
4196	Assert(SHW_PTE_IS_P(PteDst));
4197
4198	const GSTPTE PteSrc = pPTSrc->a[iPT + offPTSrc];
4199	if (!PteSrc.n.u1Present)
4200	{
4201	# ifdef IN_RING3
4202	PGMAssertHandlerAndFlagsInSync(pVM);
4203	DBGFR3PagingDumpEx(pVM->pUVM, pVCpu->idCpu, DBGFPGDMP_FLAGS_CURRENT_CR3 \| DBGFPGDMP_FLAGS_CURRENT_MODE
4204	\| DBGFPGDMP_FLAGS_GUEST \| DBGFPGDMP_FLAGS_HEADER \| DBGFPGDMP_FLAGS_PRINT_CR3,
4205	0, 0, UINT64_MAX, 99, NULL);
4206	# endif
4207	AssertMsgFailed(("Out of sync (!P) PTE at %RGv! PteSrc=%#RX64 PteDst=%#RX64 pPTSrc=%RGv iPTSrc=%x PdeSrc=%x physpte=%RGp\n",
4208	GCPtr + off, (uint64_t)PteSrc.u, SHW_PTE_LOG64(PteDst), pPTSrc, iPT + offPTSrc, PdeSrc.au32[0],
4209	(uint64_t)GST_GET_PDE_GCPHYS(PdeSrc) + (iPT + offPTSrc) * sizeof(PteSrc)));
4210	cErrors++;
4211	continue;
4212	}
4213
4214	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;
4215	# if 1 /** @todo sync accessed bit properly... */
4216	fIgnoreFlags \|= X86_PTE_A;
4217	# endif
4218
4219	/* match the physical addresses */
4220	HCPhysShw = SHW_PTE_GET_HCPHYS(PteDst);
4221	GCPhysGst = GST_GET_PTE_GCPHYS(PteSrc);
4222
4223	# ifdef IN_RING3
4224	rc = PGMPhysGCPhys2HCPhys(pVM, GCPhysGst, &HCPhys);
4225	if (RT_FAILURE(rc))
4226	{
4227	if (HCPhysShw != MMR3PageDummyHCPhys(pVM)) /** @todo this is wrong. */
4228	{
4229	AssertMsgFailed(("Cannot find guest physical address %RGp at %RGv! PteSrc=%#RX64 PteDst=%#RX64\n",
4230	GCPhysGst, GCPtr + off, (uint64_t)PteSrc.u, SHW_PTE_LOG64(PteDst)));
4231	cErrors++;
4232	continue;
4233	}
4234	}
4235	else if (HCPhysShw != (HCPhys & SHW_PTE_PG_MASK))
4236	{
4237	AssertMsgFailed(("Out of sync (phys) at %RGv! HCPhysShw=%RHp HCPhys=%RHp GCPhysGst=%RGp PteSrc=%#RX64 PteDst=%#RX64\n",
4238	GCPtr + off, HCPhysShw, HCPhys, GCPhysGst, (uint64_t)PteSrc.u, SHW_PTE_LOG64(PteDst)));
4239	cErrors++;
4240	continue;
4241	}
4242	# endif
4243
4244	pPhysPage = pgmPhysGetPage(pVM, GCPhysGst);
4245	if (!pPhysPage)
4246	{
4247	# ifdef IN_RING3 /** @todo make MMR3PageDummyHCPhys an 'All' function! */
4248	if (HCPhysShw != MMR3PageDummyHCPhys(pVM)) /** @todo this is wrong. */
4249	{
4250	AssertMsgFailed(("Cannot find guest physical address %RGp at %RGv! PteSrc=%#RX64 PteDst=%#RX64\n",
4251	GCPhysGst, GCPtr + off, (uint64_t)PteSrc.u, SHW_PTE_LOG64(PteDst)));
4252	cErrors++;
4253	continue;
4254	}
4255	# endif
4256	if (SHW_PTE_IS_RW(PteDst))
4257	{
4258	AssertMsgFailed(("Invalid guest page at %RGv is writable! GCPhysGst=%RGp PteSrc=%#RX64 PteDst=%#RX64\n",
4259	GCPtr + off, GCPhysGst, (uint64_t)PteSrc.u, SHW_PTE_LOG64(PteDst)));
4260	cErrors++;
4261	}
4262	fIgnoreFlags \|= X86_PTE_RW;
4263	}
4264	else if (HCPhysShw != PGM_PAGE_GET_HCPHYS(pPhysPage))
4265	{
4266	AssertMsgFailed(("Out of sync (phys) at %RGv! HCPhysShw=%RHp pPhysPage:%R[pgmpage] GCPhysGst=%RGp PteSrc=%#RX64 PteDst=%#RX64\n",
4267	GCPtr + off, HCPhysShw, pPhysPage, GCPhysGst, (uint64_t)PteSrc.u, SHW_PTE_LOG64(PteDst)));
4268	cErrors++;
4269	continue;
4270	}
4271
4272	/* flags */
4273	if (PGM_PAGE_HAS_ACTIVE_HANDLERS(pPhysPage))
4274	{
4275	if (!PGM_PAGE_HAS_ACTIVE_ALL_HANDLERS(pPhysPage))
4276	{
4277	if (SHW_PTE_IS_RW(PteDst))
4278	{
4279	AssertMsgFailed(("WRITE access flagged at %RGv but the page is writable! pPhysPage=%R[pgmpage] PteSrc=%#RX64 PteDst=%#RX64\n",
4280	GCPtr + off, pPhysPage, (uint64_t)PteSrc.u, SHW_PTE_LOG64(PteDst)));
4281	cErrors++;
4282	continue;
4283	}
4284	fIgnoreFlags \|= X86_PTE_RW;
4285	}
4286	else
4287	{
4288	if ( SHW_PTE_IS_P(PteDst)
4289	# if PGM_SHW_TYPE == PGM_TYPE_EPT \|\| PGM_SHW_TYPE == PGM_TYPE_PAE \|\| PGM_SHW_TYPE == PGM_TYPE_AMD64
4290	&& !PGM_PAGE_IS_MMIO(pPhysPage)
4291	# endif
4292	)
4293	{
4294	AssertMsgFailed(("ALL access flagged at %RGv but the page is present! pPhysPage=%R[pgmpage] PteSrc=%#RX64 PteDst=%#RX64\n",
4295	GCPtr + off, pPhysPage, (uint64_t)PteSrc.u, SHW_PTE_LOG64(PteDst)));
4296	cErrors++;
4297	continue;
4298	}
4299	fIgnoreFlags \|= X86_PTE_P;
4300	}
4301	}
4302	else
4303	{
4304	if (!PteSrc.n.u1Dirty && PteSrc.n.u1Write)
4305	{
4306	if (SHW_PTE_IS_RW(PteDst))
4307	{
4308	AssertMsgFailed(("!DIRTY page at %RGv is writable! PteSrc=%#RX64 PteDst=%#RX64\n",
4309	GCPtr + off, (uint64_t)PteSrc.u, SHW_PTE_LOG64(PteDst)));
4310	cErrors++;
4311	continue;
4312	}
4313	if (!SHW_PTE_IS_TRACK_DIRTY(PteDst))
4314	{
4315	AssertMsgFailed(("!DIRTY page at %RGv is not marked TRACK_DIRTY! PteSrc=%#RX64 PteDst=%#RX64\n",
4316	GCPtr + off, (uint64_t)PteSrc.u, SHW_PTE_LOG64(PteDst)));
4317	cErrors++;
4318	continue;
4319	}
4320	if (SHW_PTE_IS_D(PteDst))
4321	{
4322	AssertMsgFailed(("!DIRTY page at %RGv is marked DIRTY! PteSrc=%#RX64 PteDst=%#RX64\n",
4323	GCPtr + off, (uint64_t)PteSrc.u, SHW_PTE_LOG64(PteDst)));
4324	cErrors++;
4325	}
4326	# if 0 /** @todo sync access bit properly... */
4327	if (PteDst.n.u1Accessed != PteSrc.n.u1Accessed)
4328	{
4329	AssertMsgFailed(("!DIRTY page at %RGv is has mismatching accessed bit! PteSrc=%#RX64 PteDst=%#RX64\n",
4330	GCPtr + off, (uint64_t)PteSrc.u, SHW_PTE_LOG64(PteDst)));
4331	cErrors++;
4332	}
4333	fIgnoreFlags \|= X86_PTE_RW;
4334	# else
4335	fIgnoreFlags \|= X86_PTE_RW \| X86_PTE_A;
4336	# endif
4337	}
4338	else if (SHW_PTE_IS_TRACK_DIRTY(PteDst))
4339	{
4340	/* access bit emulation (not implemented). */
4341	if (PteSrc.n.u1Accessed \|\| SHW_PTE_IS_P(PteDst))
4342	{
4343	AssertMsgFailed(("PGM_PTFLAGS_TRACK_DIRTY set at %RGv but no accessed bit emulation! PteSrc=%#RX64 PteDst=%#RX64\n",
4344	GCPtr + off, (uint64_t)PteSrc.u, SHW_PTE_LOG64(PteDst)));
4345	cErrors++;
4346	continue;
4347	}
4348	if (!SHW_PTE_IS_A(PteDst))
4349	{
4350	AssertMsgFailed(("!ACCESSED page at %RGv is has the accessed bit set! PteSrc=%#RX64 PteDst=%#RX64\n",
4351	GCPtr + off, (uint64_t)PteSrc.u, SHW_PTE_LOG64(PteDst)));
4352	cErrors++;
4353	}
4354	fIgnoreFlags \|= X86_PTE_P;
4355	}
4356	# ifdef DEBUG_sandervl
4357	fIgnoreFlags \|= X86_PTE_D \| X86_PTE_A;
4358	# endif
4359	}
4360
4361	if ( (PteSrc.u & ~fIgnoreFlags) != (SHW_PTE_GET_U(PteDst) & ~fIgnoreFlags)
4362	&& (PteSrc.u & ~(fIgnoreFlags \| X86_PTE_RW)) != (SHW_PTE_GET_U(PteDst) & ~fIgnoreFlags)
4363	)
4364	{
4365	AssertMsgFailed(("Flags mismatch at %RGv! %#RX64 != %#RX64 fIgnoreFlags=%#RX64 PteSrc=%#RX64 PteDst=%#RX64\n",
4366	GCPtr + off, (uint64_t)PteSrc.u & ~fIgnoreFlags, SHW_PTE_LOG64(PteDst) & ~fIgnoreFlags,
4367	fIgnoreFlags, (uint64_t)PteSrc.u, SHW_PTE_LOG64(PteDst)));
4368	cErrors++;
4369	continue;
4370	}
4371	} /* foreach PTE */
4372	}
4373	else
4374	{
4375	/*
4376	* Big Page.
4377	*/
4378	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;
4379	if (!PdeSrc.b.u1Dirty && PdeSrc.b.u1Write)
4380	{
4381	if (PdeDst.n.u1Write)
4382	{
4383	AssertMsgFailed(("!DIRTY page at %RGv is writable! PdeSrc=%#RX64 PdeDst=%#RX64\n",
4384	GCPtr, (uint64_t)PdeSrc.u, (uint64_t)PdeDst.u));
4385	cErrors++;
4386	continue;
4387	}
4388	if (!(PdeDst.u & PGM_PDFLAGS_TRACK_DIRTY))
4389	{
4390	AssertMsgFailed(("!DIRTY page at %RGv is not marked TRACK_DIRTY! PteSrc=%#RX64 PteDst=%#RX64\n",
4391	GCPtr, (uint64_t)PdeSrc.u, (uint64_t)PdeDst.u));
4392	cErrors++;
4393	continue;
4394	}
4395	# if 0 /** @todo sync access bit properly... */
4396	if (PdeDst.n.u1Accessed != PdeSrc.b.u1Accessed)
4397	{
4398	AssertMsgFailed(("!DIRTY page at %RGv is has mismatching accessed bit! PteSrc=%#RX64 PteDst=%#RX64\n",
4399	GCPtr, (uint64_t)PdeSrc.u, (uint64_t)PdeDst.u));
4400	cErrors++;
4401	}
4402	fIgnoreFlags \|= X86_PTE_RW;
4403	# else
4404	fIgnoreFlags \|= X86_PTE_RW \| X86_PTE_A;
4405	# endif
4406	}
4407	else if (PdeDst.u & PGM_PDFLAGS_TRACK_DIRTY)
4408	{
4409	/* access bit emulation (not implemented). */
4410	if (PdeSrc.b.u1Accessed \|\| PdeDst.n.u1Present)
4411	{
4412	AssertMsgFailed(("PGM_PDFLAGS_TRACK_DIRTY set at %RGv but no accessed bit emulation! PdeSrc=%#RX64 PdeDst=%#RX64\n",
4413	GCPtr, (uint64_t)PdeSrc.u, (uint64_t)PdeDst.u));
4414	cErrors++;
4415	continue;
4416	}
4417	if (!PdeDst.n.u1Accessed)
4418	{
4419	AssertMsgFailed(("!ACCESSED page at %RGv is has the accessed bit set! PdeSrc=%#RX64 PdeDst=%#RX64\n",
4420	GCPtr, (uint64_t)PdeSrc.u, (uint64_t)PdeDst.u));
4421	cErrors++;
4422	}
4423	fIgnoreFlags \|= X86_PTE_P;
4424	}
4425
4426	if ((PdeSrc.u & ~fIgnoreFlags) != (PdeDst.u & ~fIgnoreFlags))
4427	{
4428	AssertMsgFailed(("Flags mismatch (B) at %RGv! %#RX64 != %#RX64 fIgnoreFlags=%#RX64 PdeSrc=%#RX64 PdeDst=%#RX64\n",
4429	GCPtr, (uint64_t)PdeSrc.u & ~fIgnoreFlags, (uint64_t)PdeDst.u & ~fIgnoreFlags,
4430	fIgnoreFlags, (uint64_t)PdeSrc.u, (uint64_t)PdeDst.u));
4431	cErrors++;
4432	}
4433
4434	/* iterate the page table. */
4435	for (unsigned iPT = 0, off = 0;
4436	iPT < RT_ELEMENTS(pPTDst->a);
4437	iPT++, off += PAGE_SIZE, GCPhysGst = PGM_A20_APPLY(pVCpu, GCPhysGst + PAGE_SIZE))
4438	{
4439	const SHWPTE PteDst = pPTDst->a[iPT];
4440
4441	if (SHW_PTE_IS_TRACK_DIRTY(PteDst))
4442	{
4443	AssertMsgFailed(("The PTE at %RGv emulating a 2/4M page is marked TRACK_DIRTY! PdeSrc=%#RX64 PteDst=%#RX64\n",
4444	GCPtr + off, (uint64_t)PdeSrc.u, SHW_PTE_LOG64(PteDst)));
4445	cErrors++;
4446	}
4447
4448	/* skip not-present entries. */
4449	if (!SHW_PTE_IS_P(PteDst)) /** @todo deal with ALL handlers and CSAM !P pages! */
4450	continue;
4451
4452	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;
4453
4454	/* match the physical addresses */
4455	HCPhysShw = SHW_PTE_GET_HCPHYS(PteDst);
4456
4457	# ifdef IN_RING3
4458	rc = PGMPhysGCPhys2HCPhys(pVM, GCPhysGst, &HCPhys);
4459	if (RT_FAILURE(rc))
4460	{
4461	if (HCPhysShw != MMR3PageDummyHCPhys(pVM)) /** @todo this is wrong. */
4462	{
4463	AssertMsgFailed(("Cannot find guest physical address %RGp at %RGv! PdeSrc=%#RX64 PteDst=%#RX64\n",
4464	GCPhysGst, GCPtr + off, (uint64_t)PdeSrc.u, SHW_PTE_LOG64(PteDst)));
4465	cErrors++;
4466	}
4467	}
4468	else if (HCPhysShw != (HCPhys & X86_PTE_PAE_PG_MASK))
4469	{
4470	AssertMsgFailed(("Out of sync (phys) at %RGv! HCPhysShw=%RHp HCPhys=%RHp GCPhysGst=%RGp PdeSrc=%#RX64 PteDst=%#RX64\n",
4471	GCPtr + off, HCPhysShw, HCPhys, GCPhysGst, (uint64_t)PdeSrc.u, SHW_PTE_LOG64(PteDst)));
4472	cErrors++;
4473	continue;
4474	}
4475	# endif
4476	pPhysPage = pgmPhysGetPage(pVM, GCPhysGst);
4477	if (!pPhysPage)
4478	{
4479	# ifdef IN_RING3 /** @todo make MMR3PageDummyHCPhys an 'All' function! */
4480	if (HCPhysShw != MMR3PageDummyHCPhys(pVM)) /** @todo this is wrong. */
4481	{
4482	AssertMsgFailed(("Cannot find guest physical address %RGp at %RGv! PdeSrc=%#RX64 PteDst=%#RX64\n",
4483	GCPhysGst, GCPtr + off, (uint64_t)PdeSrc.u, SHW_PTE_LOG64(PteDst)));
4484	cErrors++;
4485	continue;
4486	}
4487	# endif
4488	if (SHW_PTE_IS_RW(PteDst))
4489	{
4490	AssertMsgFailed(("Invalid guest page at %RGv is writable! GCPhysGst=%RGp PdeSrc=%#RX64 PteDst=%#RX64\n",
4491	GCPtr + off, GCPhysGst, (uint64_t)PdeSrc.u, SHW_PTE_LOG64(PteDst)));
4492	cErrors++;
4493	}
4494	fIgnoreFlags \|= X86_PTE_RW;
4495	}
4496	else if (HCPhysShw != PGM_PAGE_GET_HCPHYS(pPhysPage))
4497	{
4498	AssertMsgFailed(("Out of sync (phys) at %RGv! HCPhysShw=%RHp pPhysPage=%R[pgmpage] GCPhysGst=%RGp PdeSrc=%#RX64 PteDst=%#RX64\n",
4499	GCPtr + off, HCPhysShw, pPhysPage, GCPhysGst, (uint64_t)PdeSrc.u, SHW_PTE_LOG64(PteDst)));
4500	cErrors++;
4501	continue;
4502	}
4503
4504	/* flags */
4505	if (PGM_PAGE_HAS_ACTIVE_HANDLERS(pPhysPage))
4506	{
4507	if (!PGM_PAGE_HAS_ACTIVE_ALL_HANDLERS(pPhysPage))
4508	{
4509	if (PGM_PAGE_GET_HNDL_PHYS_STATE(pPhysPage) != PGM_PAGE_HNDL_PHYS_STATE_DISABLED)
4510	{
4511	if (SHW_PTE_IS_RW(PteDst))
4512	{
4513	AssertMsgFailed(("WRITE access flagged at %RGv but the page is writable! pPhysPage=%R[pgmpage] PdeSrc=%#RX64 PteDst=%#RX64\n",
4514	GCPtr + off, pPhysPage, (uint64_t)PdeSrc.u, SHW_PTE_LOG64(PteDst)));
4515	cErrors++;
4516	continue;
4517	}
4518	fIgnoreFlags \|= X86_PTE_RW;
4519	}
4520	}
4521	else
4522	{
4523	if ( SHW_PTE_IS_P(PteDst)
4524	# if PGM_SHW_TYPE == PGM_TYPE_EPT \|\| PGM_SHW_TYPE == PGM_TYPE_PAE \|\| PGM_SHW_TYPE == PGM_TYPE_AMD64
4525	&& !PGM_PAGE_IS_MMIO(pPhysPage)
4526	# endif
4527	)
4528	{
4529	AssertMsgFailed(("ALL access flagged at %RGv but the page is present! pPhysPage=%R[pgmpage] PdeSrc=%#RX64 PteDst=%#RX64\n",
4530	GCPtr + off, pPhysPage, (uint64_t)PdeSrc.u, SHW_PTE_LOG64(PteDst)));
4531	cErrors++;
4532	continue;
4533	}
4534	fIgnoreFlags \|= X86_PTE_P;
4535	}
4536	}
4537
4538	if ( (PdeSrc.u & ~fIgnoreFlags) != (SHW_PTE_GET_U(PteDst) & ~fIgnoreFlags)
4539	&& (PdeSrc.u & ~(fIgnoreFlags \| X86_PTE_RW)) != (SHW_PTE_GET_U(PteDst) & ~fIgnoreFlags) /* lazy phys handler dereg. */
4540	)
4541	{
4542	AssertMsgFailed(("Flags mismatch (BT) at %RGv! %#RX64 != %#RX64 fIgnoreFlags=%#RX64 PdeSrc=%#RX64 PteDst=%#RX64\n",
4543	GCPtr + off, (uint64_t)PdeSrc.u & ~fIgnoreFlags, SHW_PTE_LOG64(PteDst) & ~fIgnoreFlags,
4544	fIgnoreFlags, (uint64_t)PdeSrc.u, SHW_PTE_LOG64(PteDst)));
4545	cErrors++;
4546	continue;
4547	}
4548	} /* for each PTE */
4549	}
4550	}
4551	/* not present */
4552
4553	} /* for each PDE */
4554
4555	} /* for each PDPTE */
4556
4557	} /* for each PML4E */
4558
4559	# ifdef DEBUG
4560	if (cErrors)
4561	LogFlow(("AssertCR3: cErrors=%d\n", cErrors));
4562	# endif
4563	# endif /* GST is in {32BIT, PAE, AMD64} */
4564	return cErrors;
4565	#endif /* PGM_SHW_TYPE != PGM_TYPE_NESTED && PGM_SHW_TYPE != PGM_TYPE_EPT */
4566	}
4567	#endif /* VBOX_STRICT */
4568
4569
4570	/**
4571	* Sets up the CR3 for shadow paging
4572	*
4573	* @returns Strict VBox status code.
4574	* @retval VINF_SUCCESS.
4575	*
4576	* @param pVCpu The cross context virtual CPU structure.
4577	* @param GCPhysCR3 The physical address in the CR3 register. (A20
4578	* mask already applied.)
4579	*/
4580	PGM_BTH_DECL(int, MapCR3)(PVMCPU pVCpu, RTGCPHYS GCPhysCR3)
4581	{
4582	PVM pVM = pVCpu->CTX_SUFF(pVM); NOREF(pVM);
4583
4584	/* Update guest paging info. */
4585	#if PGM_GST_TYPE == PGM_TYPE_32BIT \
4586	\|\| PGM_GST_TYPE == PGM_TYPE_PAE \
4587	\|\| PGM_GST_TYPE == PGM_TYPE_AMD64
4588
4589	LogFlow(("MapCR3: %RGp\n", GCPhysCR3));
4590	PGM_A20_ASSERT_MASKED(pVCpu, GCPhysCR3);
4591
4592	/*
4593	* Map the page CR3 points at.
4594	*/
4595	RTHCPTR HCPtrGuestCR3;
4596	RTHCPHYS HCPhysGuestCR3;
4597	pgmLock(pVM);
4598	PPGMPAGE pPageCR3 = pgmPhysGetPage(pVM, GCPhysCR3);
4599	AssertReturn(pPageCR3, VERR_PGM_INVALID_CR3_ADDR);
4600	HCPhysGuestCR3 = PGM_PAGE_GET_HCPHYS(pPageCR3);
4601	/** @todo this needs some reworking wrt. locking? */
4602	# if defined(IN_RC) \|\| defined(VBOX_WITH_2X_4GB_ADDR_SPACE_IN_R0)
4603	HCPtrGuestCR3 = NIL_RTHCPTR;
4604	int rc = VINF_SUCCESS;
4605	# else
4606	int rc = pgmPhysGCPhys2CCPtrInternalDepr(pVM, pPageCR3, GCPhysCR3 & GST_CR3_PAGE_MASK, (void )&HCPtrGuestCR3); / @todo r=bird: This GCPhysCR3 masking isn't necessary. */
4607	# endif
4608	pgmUnlock(pVM);
4609	if (RT_SUCCESS(rc))
4610	{
4611	rc = PGMMap(pVM, (RTGCPTR)pVM->pgm.s.GCPtrCR3Mapping, HCPhysGuestCR3, PAGE_SIZE, 0);
4612	if (RT_SUCCESS(rc))
4613	{
4614	# ifdef IN_RC
4615	PGM_INVL_PG(pVCpu, pVM->pgm.s.GCPtrCR3Mapping);
4616	# endif
4617	# if PGM_GST_TYPE == PGM_TYPE_32BIT
4618	pVCpu->pgm.s.pGst32BitPdR3 = (R3PTRTYPE(PX86PD))HCPtrGuestCR3;
4619	# ifndef VBOX_WITH_2X_4GB_ADDR_SPACE
4620	pVCpu->pgm.s.pGst32BitPdR0 = (R0PTRTYPE(PX86PD))HCPtrGuestCR3;
4621	# endif
4622	pVCpu->pgm.s.pGst32BitPdRC = (RCPTRTYPE(PX86PD))(RTRCUINTPTR)pVM->pgm.s.GCPtrCR3Mapping;
4623
4624	# elif PGM_GST_TYPE == PGM_TYPE_PAE
4625	unsigned off = GCPhysCR3 & GST_CR3_PAGE_MASK & PAGE_OFFSET_MASK;
4626	pVCpu->pgm.s.pGstPaePdptR3 = (R3PTRTYPE(PX86PDPT))HCPtrGuestCR3;
4627	# ifndef VBOX_WITH_2X_4GB_ADDR_SPACE
4628	pVCpu->pgm.s.pGstPaePdptR0 = (R0PTRTYPE(PX86PDPT))HCPtrGuestCR3;
4629	# endif
4630	pVCpu->pgm.s.pGstPaePdptRC = (RCPTRTYPE(PX86PDPT))((RTRCUINTPTR)pVM->pgm.s.GCPtrCR3Mapping + off);
4631	LogFlow(("Cached mapping %RRv\n", pVCpu->pgm.s.pGstPaePdptRC));
4632
4633	/*
4634	* Map the 4 PDs too.
4635	*/
4636	PX86PDPT pGuestPDPT = pgmGstGetPaePDPTPtr(pVCpu);
4637	RTGCPTR GCPtr = pVM->pgm.s.GCPtrCR3Mapping + PAGE_SIZE;
4638	for (unsigned i = 0; i < X86_PG_PAE_PDPE_ENTRIES; i++, GCPtr += PAGE_SIZE)
4639	{
4640	pVCpu->pgm.s.aGstPaePdpeRegs[i].u = pGuestPDPT->a[i].u;
4641	if (pGuestPDPT->a[i].n.u1Present)
4642	{
4643	RTHCPTR HCPtr;
4644	RTHCPHYS HCPhys;
4645	RTGCPHYS GCPhys = PGM_A20_APPLY(pVCpu, pGuestPDPT->a[i].u & X86_PDPE_PG_MASK);
4646	pgmLock(pVM);
4647	PPGMPAGE pPage = pgmPhysGetPage(pVM, GCPhys);
4648	AssertReturn(pPage, VERR_PGM_INVALID_PDPE_ADDR);
4649	HCPhys = PGM_PAGE_GET_HCPHYS(pPage);
4650	# if defined(IN_RC) \|\| defined(VBOX_WITH_2X_4GB_ADDR_SPACE_IN_R0)
4651	HCPtr = NIL_RTHCPTR;
4652	int rc2 = VINF_SUCCESS;
4653	# else
4654	int rc2 = pgmPhysGCPhys2CCPtrInternalDepr(pVM, pPage, GCPhys, (void **)&HCPtr);
4655	# endif
4656	pgmUnlock(pVM);
4657	if (RT_SUCCESS(rc2))
4658	{
4659	rc = PGMMap(pVM, GCPtr, HCPhys, PAGE_SIZE, 0);
4660	AssertRCReturn(rc, rc);
4661
4662	pVCpu->pgm.s.apGstPaePDsR3[i] = (R3PTRTYPE(PX86PDPAE))HCPtr;
4663	# ifndef VBOX_WITH_2X_4GB_ADDR_SPACE
4664	pVCpu->pgm.s.apGstPaePDsR0[i] = (R0PTRTYPE(PX86PDPAE))HCPtr;
4665	# endif
4666	pVCpu->pgm.s.apGstPaePDsRC[i] = (RCPTRTYPE(PX86PDPAE))(RTRCUINTPTR)GCPtr;
4667	pVCpu->pgm.s.aGCPhysGstPaePDs[i] = GCPhys;
4668	# ifdef IN_RC
4669	PGM_INVL_PG(pVCpu, GCPtr);
4670	# endif
4671	continue;
4672	}
4673	AssertMsgFailed(("pgmR3Gst32BitMapCR3: rc2=%d GCPhys=%RGp i=%d\n", rc2, GCPhys, i));
4674	}
4675
4676	pVCpu->pgm.s.apGstPaePDsR3[i] = 0;
4677	# ifndef VBOX_WITH_2X_4GB_ADDR_SPACE
4678	pVCpu->pgm.s.apGstPaePDsR0[i] = 0;
4679	# endif
4680	pVCpu->pgm.s.apGstPaePDsRC[i] = 0;
4681	pVCpu->pgm.s.aGCPhysGstPaePDs[i] = NIL_RTGCPHYS;
4682	# ifdef IN_RC
4683	PGM_INVL_PG(pVCpu, GCPtr); /** @todo this shouldn't be necessary? */
4684	# endif
4685	}
4686
4687	# elif PGM_GST_TYPE == PGM_TYPE_AMD64
4688	pVCpu->pgm.s.pGstAmd64Pml4R3 = (R3PTRTYPE(PX86PML4))HCPtrGuestCR3;
4689	# ifndef VBOX_WITH_2X_4GB_ADDR_SPACE
4690	pVCpu->pgm.s.pGstAmd64Pml4R0 = (R0PTRTYPE(PX86PML4))HCPtrGuestCR3;
4691	# endif
4692	# endif
4693	}
4694	else
4695	AssertMsgFailed(("rc=%Rrc GCPhysGuestPD=%RGp\n", rc, GCPhysCR3));
4696	}
4697	else
4698	AssertMsgFailed(("rc=%Rrc GCPhysGuestPD=%RGp\n", rc, GCPhysCR3));
4699
4700	#else /* prot/real stub */
4701	int rc = VINF_SUCCESS;
4702	#endif
4703
4704	/* Update shadow paging info for guest modes with paging (32, pae, 64). */
4705	# if ( ( PGM_SHW_TYPE == PGM_TYPE_32BIT \
4706	\|\| PGM_SHW_TYPE == PGM_TYPE_PAE \
4707	\|\| PGM_SHW_TYPE == PGM_TYPE_AMD64) \
4708	&& ( PGM_GST_TYPE != PGM_TYPE_REAL \
4709	&& PGM_GST_TYPE != PGM_TYPE_PROT))
4710
4711	Assert(!pVM->pgm.s.fNestedPaging);
4712	PGM_A20_ASSERT_MASKED(pVCpu, GCPhysCR3);
4713
4714	/*
4715	* Update the shadow root page as well since that's not fixed.
4716	*/
4717	PPGMPOOL pPool = pVM->pgm.s.CTX_SUFF(pPool);
4718	PPGMPOOLPAGE pOldShwPageCR3 = pVCpu->pgm.s.CTX_SUFF(pShwPageCR3);
4719	PPGMPOOLPAGE pNewShwPageCR3;
4720
4721	pgmLock(pVM);
4722
4723	# ifdef PGMPOOL_WITH_OPTIMIZED_DIRTY_PT
4724	if (pPool->cDirtyPages)
4725	pgmPoolResetDirtyPages(pVM);
4726	# endif
4727
4728	Assert(!(GCPhysCR3 >> (PAGE_SHIFT + 32)));
4729	rc = pgmPoolAlloc(pVM, GCPhysCR3 & GST_CR3_PAGE_MASK, BTH_PGMPOOLKIND_ROOT, PGMPOOLACCESS_DONTCARE, PGM_A20_IS_ENABLED(pVCpu),
4730	NIL_PGMPOOL_IDX, UINT32_MAX, true /fLockPage/,
4731	&pNewShwPageCR3);
4732	AssertFatalRC(rc);
4733	rc = VINF_SUCCESS;
4734
4735	# ifdef IN_RC
4736	/*
4737	* WARNING! We can't deal with jumps to ring 3 in the code below as the
4738	* state will be inconsistent! Flush important things now while
4739	* we still can and then make sure there are no ring-3 calls.
4740	*/
4741	# ifdef VBOX_WITH_REM
4742	REMNotifyHandlerPhysicalFlushIfAlmostFull(pVM, pVCpu);
4743	# endif
4744	VMMRZCallRing3Disable(pVCpu);
4745	# endif
4746
4747	pVCpu->pgm.s.CTX_SUFF(pShwPageCR3) = pNewShwPageCR3;
4748	# ifdef IN_RING0
4749	pVCpu->pgm.s.pShwPageCR3R3 = MMHyperCCToR3(pVM, pVCpu->pgm.s.CTX_SUFF(pShwPageCR3));
4750	pVCpu->pgm.s.pShwPageCR3RC = MMHyperCCToRC(pVM, pVCpu->pgm.s.CTX_SUFF(pShwPageCR3));
4751	# elif defined(IN_RC)
4752	pVCpu->pgm.s.pShwPageCR3R3 = MMHyperCCToR3(pVM, pVCpu->pgm.s.CTX_SUFF(pShwPageCR3));
4753	pVCpu->pgm.s.pShwPageCR3R0 = MMHyperCCToR0(pVM, pVCpu->pgm.s.CTX_SUFF(pShwPageCR3));
4754	# else
4755	pVCpu->pgm.s.pShwPageCR3R0 = MMHyperCCToR0(pVM, pVCpu->pgm.s.CTX_SUFF(pShwPageCR3));
4756	pVCpu->pgm.s.pShwPageCR3RC = MMHyperCCToRC(pVM, pVCpu->pgm.s.CTX_SUFF(pShwPageCR3));
4757	# endif
4758
4759	# ifndef PGM_WITHOUT_MAPPINGS
4760	/*
4761	* Apply all hypervisor mappings to the new CR3.
4762	* Note that SyncCR3 will be executed in case CR3 is changed in a guest paging mode; this will
4763	* make sure we check for conflicts in the new CR3 root.
4764	*/
4765	# if PGM_WITH_PAGING(PGM_GST_TYPE, PGM_SHW_TYPE)
4766	Assert(VMCPU_FF_IS_SET(pVCpu, VMCPU_FF_PGM_SYNC_CR3_NON_GLOBAL) \|\| VMCPU_FF_IS_SET(pVCpu, VMCPU_FF_PGM_SYNC_CR3));
4767	# endif
4768	rc = pgmMapActivateCR3(pVM, pNewShwPageCR3);
4769	AssertRCReturn(rc, rc);
4770	# endif
4771
4772	/* Set the current hypervisor CR3. */
4773	CPUMSetHyperCR3(pVCpu, PGMGetHyperCR3(pVCpu));
4774	SELMShadowCR3Changed(pVM, pVCpu);
4775
4776	# ifdef IN_RC
4777	/* NOTE: The state is consistent again. */
4778	VMMRZCallRing3Enable(pVCpu);
4779	# endif
4780
4781	/* Clean up the old CR3 root. */
4782	if ( pOldShwPageCR3
4783	&& pOldShwPageCR3 != pNewShwPageCR3 /* @todo can happen due to incorrect syncing between REM & PGM; find the real cause */)
4784	{
4785	Assert(pOldShwPageCR3->enmKind != PGMPOOLKIND_FREE);
4786	# ifndef PGM_WITHOUT_MAPPINGS
4787	/* Remove the hypervisor mappings from the shadow page table. */
4788	pgmMapDeactivateCR3(pVM, pOldShwPageCR3);
4789	# endif
4790	/* Mark the page as unlocked; allow flushing again. */
4791	pgmPoolUnlockPage(pPool, pOldShwPageCR3);
4792
4793	pgmPoolFreeByPage(pPool, pOldShwPageCR3, NIL_PGMPOOL_IDX, UINT32_MAX);
4794	}
4795	pgmUnlock(pVM);
4796	# else
4797	NOREF(GCPhysCR3);
4798	# endif
4799
4800	return rc;
4801	}
4802
4803	/**
4804	* Unmaps the shadow CR3.
4805	*
4806	* @returns VBox status, no specials.
4807	* @param pVCpu The cross context virtual CPU structure.
4808	*/
4809	PGM_BTH_DECL(int, UnmapCR3)(PVMCPU pVCpu)
4810	{
4811	LogFlow(("UnmapCR3\n"));
4812
4813	int rc = VINF_SUCCESS;
4814	PVM pVM = pVCpu->CTX_SUFF(pVM); NOREF(pVM);
4815
4816	/*
4817	* Update guest paging info.
4818	*/
4819	#if PGM_GST_TYPE == PGM_TYPE_32BIT
4820	pVCpu->pgm.s.pGst32BitPdR3 = 0;
4821	# ifndef VBOX_WITH_2X_4GB_ADDR_SPACE
4822	pVCpu->pgm.s.pGst32BitPdR0 = 0;
4823	# endif
4824	pVCpu->pgm.s.pGst32BitPdRC = 0;
4825
4826	#elif PGM_GST_TYPE == PGM_TYPE_PAE
4827	pVCpu->pgm.s.pGstPaePdptR3 = 0;
4828	# ifndef VBOX_WITH_2X_4GB_ADDR_SPACE
4829	pVCpu->pgm.s.pGstPaePdptR0 = 0;
4830	# endif
4831	pVCpu->pgm.s.pGstPaePdptRC = 0;
4832	for (unsigned i = 0; i < X86_PG_PAE_PDPE_ENTRIES; i++)
4833	{
4834	pVCpu->pgm.s.apGstPaePDsR3[i] = 0;
4835	# ifndef VBOX_WITH_2X_4GB_ADDR_SPACE
4836	pVCpu->pgm.s.apGstPaePDsR0[i] = 0;
4837	# endif
4838	pVCpu->pgm.s.apGstPaePDsRC[i] = 0;
4839	pVCpu->pgm.s.aGCPhysGstPaePDs[i] = NIL_RTGCPHYS;
4840	}
4841
4842	#elif PGM_GST_TYPE == PGM_TYPE_AMD64
4843	pVCpu->pgm.s.pGstAmd64Pml4R3 = 0;
4844	# ifndef VBOX_WITH_2X_4GB_ADDR_SPACE
4845	pVCpu->pgm.s.pGstAmd64Pml4R0 = 0;
4846	# endif
4847
4848	#else /* prot/real mode stub */
4849	/* nothing to do */
4850	#endif
4851
4852	#if !defined(IN_RC) /* In RC we rely on MapCR3 to do the shadow part for us at a safe time */
4853	/*
4854	* Update shadow paging info.
4855	*/
4856	# if ( ( PGM_SHW_TYPE == PGM_TYPE_32BIT \
4857	\|\| PGM_SHW_TYPE == PGM_TYPE_PAE \
4858	\|\| PGM_SHW_TYPE == PGM_TYPE_AMD64))
4859
4860	# if PGM_GST_TYPE != PGM_TYPE_REAL
4861	Assert(!pVM->pgm.s.fNestedPaging);
4862	# endif
4863
4864	pgmLock(pVM);
4865
4866	# ifndef PGM_WITHOUT_MAPPINGS
4867	if (pVCpu->pgm.s.CTX_SUFF(pShwPageCR3))
4868	/* Remove the hypervisor mappings from the shadow page table. */
4869	pgmMapDeactivateCR3(pVM, pVCpu->pgm.s.CTX_SUFF(pShwPageCR3));
4870	# endif
4871
4872	if (pVCpu->pgm.s.CTX_SUFF(pShwPageCR3))
4873	{
4874	PPGMPOOL pPool = pVM->pgm.s.CTX_SUFF(pPool);
4875
4876	# ifdef PGMPOOL_WITH_OPTIMIZED_DIRTY_PT
4877	if (pPool->cDirtyPages)
4878	pgmPoolResetDirtyPages(pVM);
4879	# endif
4880
4881	/* Mark the page as unlocked; allow flushing again. */
4882	pgmPoolUnlockPage(pPool, pVCpu->pgm.s.CTX_SUFF(pShwPageCR3));
4883
4884	pgmPoolFreeByPage(pPool, pVCpu->pgm.s.CTX_SUFF(pShwPageCR3), NIL_PGMPOOL_IDX, UINT32_MAX);
4885	pVCpu->pgm.s.pShwPageCR3R3 = 0;
4886	pVCpu->pgm.s.pShwPageCR3R0 = 0;
4887	pVCpu->pgm.s.pShwPageCR3RC = 0;
4888	}
4889	pgmUnlock(pVM);
4890	# endif
4891	#endif /* !IN_RC*/
4892
4893	return rc;
4894	}

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source: vbox/trunk/src/VBox/VMM/VMMAll/PGMAllBth.h@ 71290

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