PGMGst.h@ 10360

Last change on this file since 10360 was 10035, checked in by vboxsync, 16 years ago
More annoying assertions removed
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1	/* $Id: PGMGst.h 10035 2008-06-30 17:12:12Z vboxsync $ */
2	/** @file
3	* VBox - Page Manager / Monitor, Guest Paging Template.
4	*/
5
6	/*
7	* Copyright (C) 2006-2007 Sun Microsystems, Inc.
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.virtualbox.org. This file is free software;
11	* you can redistribute it and/or modify it under the terms of the GNU
12	* General Public License (GPL) as published by the Free Software
13	* Foundation, in version 2 as it comes in the "COPYING" file of the
14	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16	*
17	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
18	* Clara, CA 95054 USA or visit http://www.sun.com if you need
19	* additional information or have any questions.
20	*/
21
22	/*******************************************************************************
23	* Defined Constants And Macros *
24	*******************************************************************************/
25	#undef GSTPT
26	#undef PGSTPT
27	#undef GSTPTE
28	#undef PGSTPTE
29	#undef GSTPD
30	#undef PGSTPD
31	#undef GSTPDE
32	#undef PGSTPDE
33	#undef GST_BIG_PAGE_SIZE
34	#undef GST_BIG_PAGE_OFFSET_MASK
35	#undef GST_PDE_PG_MASK
36	#undef GST_PDE_BIG_PG_MASK
37	#undef GST_PD_SHIFT
38	#undef GST_PD_MASK
39	#undef GST_PTE_PG_MASK
40	#undef GST_PT_SHIFT
41	#undef GST_PT_MASK
42	#undef GST_TOTAL_PD_ENTRIES
43	#undef GST_CR3_PAGE_MASK
44	#undef GST_PDPE_ENTRIES
45
46	#if PGM_GST_TYPE == PGM_TYPE_32BIT \
47	\|\| PGM_GST_TYPE == PGM_TYPE_REAL \
48	\|\| PGM_GST_TYPE == PGM_TYPE_PROT
49	# define GSTPT X86PT
50	# define PGSTPT PX86PT
51	# define GSTPTE X86PTE
52	# define PGSTPTE PX86PTE
53	# define GSTPD X86PD
54	# define PGSTPD PX86PD
55	# define GSTPDE X86PDE
56	# define PGSTPDE PX86PDE
57	# define GST_BIG_PAGE_SIZE X86_PAGE_4M_SIZE
58	# define GST_BIG_PAGE_OFFSET_MASK X86_PAGE_4M_OFFSET_MASK
59	# define GST_PDE_PG_MASK X86_PDE_PG_MASK
60	# define GST_PDE_BIG_PG_MASK X86_PDE4M_PG_MASK
61	# define GST_PD_SHIFT X86_PD_SHIFT
62	# define GST_PD_MASK X86_PD_MASK
63	# define GST_TOTAL_PD_ENTRIES X86_PG_ENTRIES
64	# define GST_PTE_PG_MASK X86_PTE_PG_MASK
65	# define GST_PT_SHIFT X86_PT_SHIFT
66	# define GST_PT_MASK X86_PT_MASK
67	# define GST_CR3_PAGE_MASK X86_CR3_PAGE_MASK
68	#elif PGM_GST_TYPE == PGM_TYPE_PAE \
69	\|\| PGM_GST_TYPE == PGM_TYPE_AMD64
70	# define GSTPT X86PTPAE
71	# define PGSTPT PX86PTPAE
72	# define GSTPTE X86PTEPAE
73	# define PGSTPTE PX86PTEPAE
74	# define GSTPD X86PDPAE
75	# define PGSTPD PX86PDPAE
76	# define GSTPDE X86PDEPAE
77	# define PGSTPDE PX86PDEPAE
78	# define GST_BIG_PAGE_SIZE X86_PAGE_2M_SIZE
79	# define GST_BIG_PAGE_OFFSET_MASK X86_PAGE_2M_OFFSET_MASK
80	# define GST_PDE_PG_MASK X86_PDE_PAE_PG_MASK
81	# define GST_PDE_BIG_PG_MASK X86_PDE2M_PAE_PG_MASK
82	# define GST_PD_SHIFT X86_PD_PAE_SHIFT
83	# define GST_PD_MASK X86_PD_PAE_MASK
84	# if PGM_GST_TYPE == PGM_TYPE_PAE
85	# define GST_TOTAL_PD_ENTRIES (X86_PG_PAE_ENTRIES * X86_PG_PAE_PDPE_ENTRIES)
86	# define GST_PDPE_ENTRIES X86_PG_PAE_PDPE_ENTRIES
87	# else
88	# define GST_TOTAL_PD_ENTRIES (X86_PG_AMD64_ENTRIES * X86_PG_AMD64_PDPE_ENTRIES)
89	# define GST_PDPE_ENTRIES X86_PG_AMD64_PDPE_ENTRIES
90	# endif
91	# define GST_PTE_PG_MASK X86_PTE_PAE_PG_MASK
92	# define GST_PT_SHIFT X86_PT_PAE_SHIFT
93	# define GST_PT_MASK X86_PT_PAE_MASK
94	# define GST_CR3_PAGE_MASK X86_CR3_PAE_PAGE_MASK
95	#endif
96
97
98	/*******************************************************************************
99	* Internal Functions *
100	*******************************************************************************/
101	__BEGIN_DECLS
102	/* r3 */
103	PGM_GST_DECL(int, InitData)(PVM pVM, PPGMMODEDATA pModeData, bool fResolveGCAndR0);
104	PGM_GST_DECL(int, Enter)(PVM pVM, RTGCPHYS GCPhysCR3);
105	PGM_GST_DECL(int, Relocate)(PVM pVM, RTGCUINTPTR offDelta);
106	PGM_GST_DECL(int, Exit)(PVM pVM);
107
108	static DECLCALLBACK(int) pgmR3Gst32BitWriteHandlerCR3(PVM pVM, RTGCPHYS GCPhys, void pvPhys, void pvBuf, size_t cbBuf, PGMACCESSTYPE enmAccessType, void *pvUser);
109	static DECLCALLBACK(int) pgmR3GstPAEWriteHandlerCR3(PVM pVM, RTGCPHYS GCPhys, void pvPhys, void pvBuf, size_t cbBuf, PGMACCESSTYPE enmAccessType, void *pvUser);
110	#if 0
111	static DECLCALLBACK(int) pgmR3GstPAEWriteHandlerPD(PVM pVM, RTGCPHYS GCPhys, void pvPhys, void pvBuf, size_t cbBuf, PGMACCESSTYPE enmAccessType, void *pvUser);
112	#endif
113
114	/* all */
115	PGM_GST_DECL(int, GetPage)(PVM pVM, RTGCUINTPTR GCPtr, uint64_t *pfFlags, PRTGCPHYS pGCPhys);
116	PGM_GST_DECL(int, ModifyPage)(PVM pVM, RTGCUINTPTR GCPtr, size_t cb, uint64_t fFlags, uint64_t fMask);
117	PGM_GST_DECL(int, GetPDE)(PVM pVM, RTGCUINTPTR GCPtr, PX86PDEPAE pPDE);
118	PGM_GST_DECL(int, MapCR3)(PVM pVM, RTGCPHYS GCPhysCR3);
119	PGM_GST_DECL(int, UnmapCR3)(PVM pVM);
120	PGM_GST_DECL(int, MonitorCR3)(PVM pVM, RTGCPHYS GCPhysCR3);
121	PGM_GST_DECL(int, UnmonitorCR3)(PVM pVM);
122	__END_DECLS
123
124
125	/**
126	* Initializes the guest bit of the paging mode data.
127	*
128	* @returns VBox status code.
129	* @param pVM The VM handle.
130	* @param fResolveGCAndR0 Indicate whether or not GC and Ring-0 symbols can be resolved now.
131	* This is used early in the init process to avoid trouble with PDM
132	* not being initialized yet.
133	*/
134	PGM_GST_DECL(int, InitData)(PVM pVM, PPGMMODEDATA pModeData, bool fResolveGCAndR0)
135	{
136	Assert(pModeData->uGstType == PGM_GST_TYPE);
137
138	/* Ring-3 */
139	pModeData->pfnR3GstRelocate = PGM_GST_NAME(Relocate);
140	pModeData->pfnR3GstExit = PGM_GST_NAME(Exit);
141	pModeData->pfnR3GstGetPDE = PGM_GST_NAME(GetPDE);
142	pModeData->pfnR3GstGetPage = PGM_GST_NAME(GetPage);
143	pModeData->pfnR3GstModifyPage = PGM_GST_NAME(ModifyPage);
144	pModeData->pfnR3GstMapCR3 = PGM_GST_NAME(MapCR3);
145	pModeData->pfnR3GstUnmapCR3 = PGM_GST_NAME(UnmapCR3);
146	pModeData->pfnR3GstMonitorCR3 = PGM_GST_NAME(MonitorCR3);
147	pModeData->pfnR3GstUnmonitorCR3 = PGM_GST_NAME(UnmonitorCR3);
148
149	#if PGM_GST_TYPE == PGM_TYPE_32BIT \|\| PGM_GST_TYPE == PGM_TYPE_PAE
150	pModeData->pfnR3GstWriteHandlerCR3 = PGM_GST_NAME(WriteHandlerCR3);
151	pModeData->pszR3GstWriteHandlerCR3 = "Guest CR3 Write access handler";
152	pModeData->pfnR3GstPAEWriteHandlerCR3 = PGM_GST_NAME(WriteHandlerCR3);
153	pModeData->pszR3GstPAEWriteHandlerCR3 = "Guest CR3 Write access handler (PAE)";
154	#else
155	pModeData->pfnR3GstWriteHandlerCR3 = NULL;
156	pModeData->pszR3GstWriteHandlerCR3 = NULL;
157	pModeData->pfnR3GstPAEWriteHandlerCR3 = NULL;
158	pModeData->pszR3GstPAEWriteHandlerCR3 = NULL;
159	#endif
160
161	if (fResolveGCAndR0)
162	{
163	int rc;
164
165	#if PGM_SHW_TYPE != PGM_TYPE_AMD64 /* No AMD64 for traditional virtualization, only VT-x and AMD-V. */
166	/* GC */
167	rc = PDMR3GetSymbolGC(pVM, NULL, PGM_GST_NAME_GC_STR(GetPage), &pModeData->pfnGCGstGetPage);
168	AssertMsgRCReturn(rc, ("%s -> rc=%Vrc\n", PGM_GST_NAME_GC_STR(GetPage), rc), rc);
169	rc = PDMR3GetSymbolGC(pVM, NULL, PGM_GST_NAME_GC_STR(ModifyPage), &pModeData->pfnGCGstModifyPage);
170	AssertMsgRCReturn(rc, ("%s -> rc=%Vrc\n", PGM_GST_NAME_GC_STR(ModifyPage), rc), rc);
171	rc = PDMR3GetSymbolGC(pVM, NULL, PGM_GST_NAME_GC_STR(GetPDE), &pModeData->pfnGCGstGetPDE);
172	AssertMsgRCReturn(rc, ("%s -> rc=%Vrc\n", PGM_GST_NAME_GC_STR(GetPDE), rc), rc);
173	rc = PDMR3GetSymbolGC(pVM, NULL, PGM_GST_NAME_GC_STR(MonitorCR3), &pModeData->pfnGCGstMonitorCR3);
174	AssertMsgRCReturn(rc, ("%s -> rc=%Vrc\n", PGM_GST_NAME_GC_STR(MonitorCR3), rc), rc);
175	rc = PDMR3GetSymbolGC(pVM, NULL, PGM_GST_NAME_GC_STR(UnmonitorCR3), &pModeData->pfnGCGstUnmonitorCR3);
176	AssertMsgRCReturn(rc, ("%s -> rc=%Vrc\n", PGM_GST_NAME_GC_STR(UnmonitorCR3), rc), rc);
177	rc = PDMR3GetSymbolGC(pVM, NULL, PGM_GST_NAME_GC_STR(MapCR3), &pModeData->pfnGCGstMapCR3);
178	AssertMsgRCReturn(rc, ("%s -> rc=%Vrc\n", PGM_GST_NAME_GC_STR(MapCR3), rc), rc);
179	rc = PDMR3GetSymbolGC(pVM, NULL, PGM_GST_NAME_GC_STR(UnmapCR3), &pModeData->pfnGCGstUnmapCR3);
180	AssertMsgRCReturn(rc, ("%s -> rc=%Vrc\n", PGM_GST_NAME_GC_STR(UnmapCR3), rc), rc);
181	# if PGM_GST_TYPE == PGM_TYPE_32BIT \|\| PGM_GST_TYPE == PGM_TYPE_PAE
182	rc = PDMR3GetSymbolGC(pVM, NULL, PGM_GST_NAME_GC_STR(WriteHandlerCR3), &pModeData->pfnGCGstWriteHandlerCR3);
183	AssertMsgRCReturn(rc, ("%s -> rc=%Vrc\n", PGM_GST_NAME_GC_STR(WriteHandlerCR3), rc), rc);
184	rc = PDMR3GetSymbolGC(pVM, NULL, PGM_GST_NAME_GC_STR(WriteHandlerCR3), &pModeData->pfnGCGstPAEWriteHandlerCR3);
185	AssertMsgRCReturn(rc, ("%s -> rc=%Vrc\n", PGM_GST_NAME_GC_STR(PAEWriteHandlerCR3), rc), rc);
186	# endif
187	#endif /* Not AMD64 shadow paging. */
188
189	/* Ring-0 */
190	rc = PDMR3GetSymbolR0(pVM, NULL, PGM_GST_NAME_R0_STR(GetPage), &pModeData->pfnR0GstGetPage);
191	AssertMsgRCReturn(rc, ("%s -> rc=%Vrc\n", PGM_GST_NAME_R0_STR(GetPage), rc), rc);
192	rc = PDMR3GetSymbolR0(pVM, NULL, PGM_GST_NAME_R0_STR(ModifyPage), &pModeData->pfnR0GstModifyPage);
193	AssertMsgRCReturn(rc, ("%s -> rc=%Vrc\n", PGM_GST_NAME_R0_STR(ModifyPage), rc), rc);
194	rc = PDMR3GetSymbolR0(pVM, NULL, PGM_GST_NAME_R0_STR(GetPDE), &pModeData->pfnR0GstGetPDE);
195	AssertMsgRCReturn(rc, ("%s -> rc=%Vrc\n", PGM_GST_NAME_R0_STR(GetPDE), rc), rc);
196	rc = PDMR3GetSymbolR0(pVM, NULL, PGM_GST_NAME_R0_STR(MonitorCR3), &pModeData->pfnR0GstMonitorCR3);
197	AssertMsgRCReturn(rc, ("%s -> rc=%Vrc\n", PGM_GST_NAME_R0_STR(MonitorCR3), rc), rc);
198	rc = PDMR3GetSymbolR0(pVM, NULL, PGM_GST_NAME_R0_STR(UnmonitorCR3), &pModeData->pfnR0GstUnmonitorCR3);
199	AssertMsgRCReturn(rc, ("%s -> rc=%Vrc\n", PGM_GST_NAME_R0_STR(UnmonitorCR3), rc), rc);
200	rc = PDMR3GetSymbolR0(pVM, NULL, PGM_GST_NAME_R0_STR(MapCR3), &pModeData->pfnR0GstMapCR3);
201	AssertMsgRCReturn(rc, ("%s -> rc=%Vrc\n", PGM_GST_NAME_R0_STR(MapCR3), rc), rc);
202	rc = PDMR3GetSymbolR0(pVM, NULL, PGM_GST_NAME_R0_STR(UnmapCR3), &pModeData->pfnR0GstUnmapCR3);
203	AssertMsgRCReturn(rc, ("%s -> rc=%Vrc\n", PGM_GST_NAME_R0_STR(UnmapCR3), rc), rc);
204	#if PGM_GST_TYPE == PGM_TYPE_32BIT \|\| PGM_GST_TYPE == PGM_TYPE_PAE
205	rc = PDMR3GetSymbolR0(pVM, NULL, PGM_GST_NAME_R0_STR(WriteHandlerCR3), &pModeData->pfnR0GstWriteHandlerCR3);
206	AssertMsgRCReturn(rc, ("%s -> rc=%Vrc\n", PGM_GST_NAME_R0_STR(WriteHandlerCR3), rc), rc);
207	rc = PDMR3GetSymbolR0(pVM, NULL, PGM_GST_NAME_R0_STR(WriteHandlerCR3), &pModeData->pfnR0GstPAEWriteHandlerCR3);
208	AssertMsgRCReturn(rc, ("%s -> rc=%Vrc\n", PGM_GST_NAME_R0_STR(PAEWriteHandlerCR3), rc), rc);
209	#endif
210	}
211
212	return VINF_SUCCESS;
213	}
214
215
216	/**
217	* Enters the guest mode.
218	*
219	* @returns VBox status code.
220	* @param pVM VM handle.
221	* @param GCPhysCR3 The physical address from the CR3 register.
222	*/
223	PGM_GST_DECL(int, Enter)(PVM pVM, RTGCPHYS GCPhysCR3)
224	{
225	/*
226	* Map and monitor CR3
227	*/
228	int rc = PGM_GST_NAME(MapCR3)(pVM, GCPhysCR3);
229	if (VBOX_SUCCESS(rc) && !pVM->pgm.s.fMappingsFixed)
230	rc = PGM_GST_NAME(MonitorCR3)(pVM, GCPhysCR3);
231	return rc;
232	}
233
234
235	/**
236	* Relocate any GC pointers related to guest mode paging.
237	*
238	* @returns VBox status code.
239	* @param pVM The VM handle.
240	* @param offDelta The reloation offset.
241	*/
242	PGM_GST_DECL(int, Relocate)(PVM pVM, RTGCUINTPTR offDelta)
243	{
244	/* nothing special to do here - InitData does the job. */
245	return VINF_SUCCESS;
246	}
247
248
249	/**
250	* Exits the guest mode.
251	*
252	* @returns VBox status code.
253	* @param pVM VM handle.
254	*/
255	PGM_GST_DECL(int, Exit)(PVM pVM)
256	{
257	int rc = PGM_GST_NAME(UnmonitorCR3)(pVM);
258	if (VBOX_SUCCESS(rc))
259	rc = PGM_GST_NAME(UnmapCR3)(pVM);
260	return rc;
261	}
262
263
264	#if PGM_GST_TYPE == PGM_TYPE_32BIT
265	/**
266	* Physical write access for the Guest CR3 in 32-bit mode.
267	*
268	* @returns VINF_SUCCESS if the handler have carried out the operation.
269	* @returns VINF_PGM_HANDLER_DO_DEFAULT if the caller should carry out the access operation.
270	* @param pVM VM Handle.
271	* @param GCPhys The physical address the guest is writing to.
272	* @param pvPhys The HC mapping of that address.
273	* @param pvBuf What the guest is reading/writing.
274	* @param cbBuf How much it's reading/writing.
275	* @param enmAccessType The access type.
276	* @param pvUser User argument.
277	*/
278	static DECLCALLBACK(int) pgmR3Gst32BitWriteHandlerCR3(PVM pVM, RTGCPHYS GCPhys, void pvPhys, void pvBuf, size_t cbBuf, PGMACCESSTYPE enmAccessType, void *pvUser)
279	{
280	AssertMsg(!pVM->pgm.s.fMappingsFixed, ("Shouldn't be registered when mappings are fixed!\n"));
281	Assert(enmAccessType == PGMACCESSTYPE_WRITE);
282	Log2(("pgmR3Gst32BitWriteHandlerCR3: ff=%#x GCPhys=%VGp pvPhys=%p cbBuf=%d pvBuf={%.*Vhxs}\n", pVM->fForcedActions, GCPhys, pvPhys, cbBuf, cbBuf, pvBuf));
283
284	/*
285	* Do the write operation.
286	*/
287	memcpy(pvPhys, pvBuf, cbBuf);
288	if ( !pVM->pgm.s.fMappingsFixed
289	&& !VM_FF_ISPENDING(pVM, VM_FF_PGM_SYNC_CR3 \| VM_FF_PGM_SYNC_CR3_NON_GLOBAL))
290	{
291	/*
292	* Check for conflicts.
293	*/
294	const RTGCUINTPTR offPD = GCPhys & PAGE_OFFSET_MASK;
295	const unsigned iPD1 = offPD / sizeof(X86PDE);
296	const unsigned iPD2 = (offPD + cbBuf - 1) / sizeof(X86PDE);
297	Assert(iPD1 - iPD2 <= 1);
298	if ( ( pVM->pgm.s.pGuestPDHC->a[iPD1].n.u1Present
299	&& pgmGetMapping(pVM, iPD1 << X86_PD_SHIFT) )
300	\|\| ( iPD1 != iPD2
301	&& pVM->pgm.s.pGuestPDHC->a[iPD2].n.u1Present
302	&& pgmGetMapping(pVM, iPD2 << X86_PD_SHIFT) )
303	)
304	{
305	Log(("pgmR3Gst32BitWriteHandlerCR3: detected conflict. iPD1=%#x iPD2=%#x GCPhys=%VGp\n", iPD1, iPD2, GCPhys));
306	STAM_COUNTER_INC(&pVM->pgm.s.StatHCGuestPDWriteConflict);
307	VM_FF_SET(pVM, VM_FF_PGM_SYNC_CR3);
308	}
309	}
310
311	STAM_COUNTER_INC(&pVM->pgm.s.StatHCGuestPDWrite);
312	return VINF_SUCCESS;
313	}
314	#endif /* 32BIT */
315
316
317	#if PGM_GST_TYPE == PGM_TYPE_PAE
318	/**
319	* Physical write access handler for the Guest CR3 in PAE mode.
320	*
321	* @returns VINF_SUCCESS if the handler have carried out the operation.
322	* @returns VINF_PGM_HANDLER_DO_DEFAULT if the caller should carry out the access operation.
323	* @param pVM VM Handle.
324	* @param GCPhys The physical address the guest is writing to.
325	* @param pvPhys The HC mapping of that address.
326	* @param pvBuf What the guest is reading/writing.
327	* @param cbBuf How much it's reading/writing.
328	* @param enmAccessType The access type.
329	* @param pvUser User argument.
330	*/
331	static DECLCALLBACK(int) pgmR3GstPAEWriteHandlerCR3(PVM pVM, RTGCPHYS GCPhys, void pvPhys, void pvBuf, size_t cbBuf, PGMACCESSTYPE enmAccessType, void *pvUser)
332	{
333	AssertMsg(!pVM->pgm.s.fMappingsFixed, ("Shouldn't be registered when mappings are fixed!\n"));
334	Assert(enmAccessType == PGMACCESSTYPE_WRITE);
335	Log2(("pgmR3GstPAEWriteHandlerCR3: ff=%#x GCPhys=%VGp pvPhys=%p cbBuf=%d pvBuf={%.*Vhxs}\n", pVM->fForcedActions, GCPhys, pvPhys, cbBuf, cbBuf, pvBuf));
336
337	/*
338	* Do the write operation.
339	*/
340	memcpy(pvPhys, pvBuf, cbBuf);
341	if ( !pVM->pgm.s.fMappingsFixed
342	&& !VM_FF_ISPENDING(pVM, VM_FF_PGM_SYNC_CR3 \| VM_FF_PGM_SYNC_CR3_NON_GLOBAL))
343	{
344	/*
345	* Check if any of the PDs have changed.
346	* We'll simply check all of them instead of figuring out which one/two to check.
347	*/
348	for (unsigned i = 0; i < 4; i++)
349	{
350	if ( pVM->pgm.s.pGstPaePDPTHC->a[i].n.u1Present
351	&& (pVM->pgm.s.pGstPaePDPTHC->a[i].u & X86_PDPE_PG_MASK) != pVM->pgm.s.aGCPhysGstPaePDsMonitored[i])
352	{
353	Log(("pgmR3GstPAEWriteHandlerCR3: detected updated PDPE; [%d] = %#llx, Old GCPhys=%VGp\n",
354	i, pVM->pgm.s.pGstPaePDPTHC->a[i].u, pVM->pgm.s.aGCPhysGstPaePDsMonitored[i]));
355	/*
356	* The PD has changed.
357	* We will schedule a monitoring update for the next TLB Flush,
358	* InvalidatePage or SyncCR3.
359	*
360	* This isn't perfect, because a lazy page sync might be dealing with an half
361	* updated PDPE. However, we assume that the guest OS is disabling interrupts
362	* and being extremely careful (cmpxchg8b) when updating a PDPE where it's
363	* executing.
364	*/
365	pVM->pgm.s.fSyncFlags \|= PGM_SYNC_MONITOR_CR3;
366	}
367	}
368	}
369	/*
370	* Flag a updating of the monitor at the next crossroad so we don't monitor the
371	* wrong pages for soo long that they can be reused as code pages and freak out
372	* the recompiler or something.
373	*/
374	else
375	pVM->pgm.s.fSyncFlags \|= PGM_SYNC_MONITOR_CR3;
376
377
378	STAM_COUNTER_INC(&pVM->pgm.s.StatHCGuestPDWrite);
379	return VINF_SUCCESS;
380	}
381
382	# if 0
383	/**
384	* Physical write access for Guest CR3.
385	*
386	* @returns VINF_SUCCESS if the handler have carried out the operation.
387	* @returns VINF_PGM_HANDLER_DO_DEFAULT if the caller should carry out the access operation.
388	* @param pVM VM Handle.
389	* @param GCPhys The physical address the guest is writing to.
390	* @param pvPhys The HC mapping of that address.
391	* @param pvBuf What the guest is reading/writing.
392	* @param cbBuf How much it's reading/writing.
393	* @param enmAccessType The access type.
394	* @param pvUser User argument.
395	*/
396	static DECLCALLBACK(int) pgmR3GstPAEWriteHandlerPD(PVM pVM, RTGCPHYS GCPhys, void pvPhys, void pvBuf, size_t cbBuf, PGMACCESSTYPE enmAccessType, void *pvUser)
397	{
398	AssertMsg(!pVM->pgm.s.fMappingsFixed, ("Shouldn't be registered when mappings are fixed!\n"));
399	Assert(enmAccessType == PGMACCESSTYPE_WRITE);
400	Log2(("pgmR3GstPAEWriteHandlerPD: ff=%#x GCPhys=%VGp pvPhys=%p cbBuf=%d pvBuf={%.*Vhxs}\n", pVM->fForcedActions, GCPhys, pvPhys, cbBuf, cbBuf, pvBuf));
401
402	/*
403	* Do the write operation.
404	*/
405	memcpy(pvPhys, pvBuf, cbBuf);
406	if ( !pVM->pgm.s.fMappingsFixed
407	&& !VM_FF_ISPENDING(pVM, VM_FF_PGM_SYNC_CR3 \| VM_FF_PGM_SYNC_CR3_NON_GLOBAL))
408	{
409	/*
410	* Figure out which of the 4 PDs this is.
411	*/
412	unsigned i;
413	for (i = 0; i < 4; i++)
414	if (pVM->pgm.s.pGstPaePDPTHC->a[i].u == (GCPhys & X86_PTE_PAE_PG_MASK))
415	{
416	PX86PDPAE pPDSrc = pgmGstGetPaePD(&pVM->pgm.s, i << X86_PDPT_SHIFT);
417	const RTGCUINTPTR offPD = GCPhys & PAGE_OFFSET_MASK;
418	const unsigned iPD1 = offPD / sizeof(X86PDEPAE);
419	const unsigned iPD2 = (offPD + cbBuf - 1) / sizeof(X86PDEPAE);
420	Assert(iPD1 - iPD2 <= 1);
421	if ( ( pPDSrc->a[iPD1].n.u1Present
422	&& pgmGetMapping(pVM, (i << X86_PDPT_SHIFT) \| (iPD1 << X86_PD_PAE_SHIFT)) )
423	\|\| ( iPD1 != iPD2
424	&& pPDSrc->a[iPD2].n.u1Present
425	&& pgmGetMapping(pVM, (i << X86_PDPT_SHIFT) \| (iPD2 << X86_PD_PAE_SHIFT)) )
426	)
427	{
428	Log(("pgmR3GstPaePD3WriteHandler: detected conflict. i=%d iPD1=%#x iPD2=%#x GCPhys=%VGp\n",
429	i, iPD1, iPD2, GCPhys));
430	STAM_COUNTER_INC(&pVM->pgm.s.StatHCGuestPDWriteConflict);
431	VM_FF_SET(pVM, VM_FF_PGM_SYNC_CR3);
432	}
433	break; /* ASSUMES no duplicate entries... */
434	}
435	Assert(i < 4);
436	}
437
438	STAM_COUNTER_INC(&pVM->pgm.s.StatHCGuestPDWrite);
439	return VINF_SUCCESS;
440	}
441	# endif
442	#endif /* PAE */
443

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source: vbox/trunk/src/VBox/VMM/PGMGst.h@ 10360

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