PGMAllGst.h@ 847

Last change on this file since 847 was 23, checked in by vboxsync, 18 years ago
string.h & stdio.h + header cleanups.
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1	/* $Id: PGMAllGst.h 23 2007-01-15 14:08:28Z vboxsync $ */
2	/** @file
3	* VBox - Page Manager, Guest Paging Template - All context code.
4	*/
5
6	/*
7	* Copyright (C) 2006 InnoTek Systemberatung GmbH
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 as published by the Free Software Foundation,
13	* in version 2 as it comes in the "COPYING" file of the VirtualBox OSE
14	* distribution. VirtualBox OSE is distributed in the hope that it will
15	* be useful, but WITHOUT ANY WARRANTY of any kind.
16	*
17	* If you received this file as part of a commercial VirtualBox
18	* distribution, then only the terms of your commercial VirtualBox
19	* license agreement apply instead of the previous paragraph.
20	*/
21
22
23	/*******************************************************************************
24	* Defined Constants And Macros *
25	*******************************************************************************/
26	#undef GSTPT
27	#undef PGSTPT
28	#undef GSTPTE
29	#undef PGSTPTE
30	#undef GSTPD
31	#undef PGSTPD
32	#undef GSTPDE
33	#undef PGSTPDE
34	#undef GST_BIG_PAGE_SIZE
35	#undef GST_BIG_PAGE_OFFSET_MASK
36	#undef GST_PDE_PG_MASK
37	#undef GST_PDE4M_PG_MASK
38	#undef GST_PD_SHIFT
39	#undef GST_PD_MASK
40	#undef GST_PTE_PG_MASK
41	#undef GST_PT_SHIFT
42	#undef GST_PT_MASK
43	#undef GST_TOTAL_PD_ENTRIES
44
45	#if PGM_GST_TYPE == PGM_TYPE_32BIT
46	# define GSTPT X86PT
47	# define PGSTPT PX86PT
48	# define GSTPTE X86PTE
49	# define PGSTPTE PX86PTE
50	# define GSTPD X86PD
51	# define PGSTPD PX86PD
52	# define GSTPDE X86PDE
53	# define PGSTPDE PX86PDE
54	# define GST_BIG_PAGE_SIZE X86_PAGE_4M_SIZE
55	# define GST_BIG_PAGE_OFFSET_MASK X86_PAGE_4M_OFFSET_MASK
56	# define GST_PDE_PG_MASK X86_PDE_PG_MASK
57	# define GST_PDE4M_PG_MASK X86_PDE4M_PG_MASK
58	# define GST_PD_SHIFT X86_PD_SHIFT
59	# define GST_PD_MASK X86_PD_MASK
60	# define GST_TOTAL_PD_ENTRIES X86_PG_ENTRIES
61	# define GST_PTE_PG_MASK X86_PTE_PG_MASK
62	# define GST_PT_SHIFT X86_PT_SHIFT
63	# define GST_PT_MASK X86_PT_MASK
64	#else
65	# define GSTPT X86PTPAE
66	# define PGSTPT PX86PTPAE
67	# define GSTPTE X86PTEPAE
68	# define PGSTPTE PX86PTEPAE
69	# define GSTPD X86PDPAE
70	# define PGSTPD PX86PDPAE
71	# define GSTPDE X86PDEPAE
72	# define PGSTPDE PX86PDEPAE
73	# define GST_BIG_PAGE_SIZE X86_PAGE_2M_SIZE
74	# define GST_BIG_PAGE_OFFSET_MASK X86_PAGE_2M_OFFSET_MASK
75	# define GST_PDE_PG_MASK X86_PDE_PAE_PG_MASK
76	# define GST_PDE4M_PG_MASK X86_PDE4M_PAE_PG_MASK
77	# define GST_PD_SHIFT X86_PD_PAE_SHIFT
78	# define GST_PD_MASK X86_PD_PAE_MASK
79	# define GST_TOTAL_PD_ENTRIES (X86_PG_PAE_ENTRIES*4)
80	# define GST_PTE_PG_MASK X86_PTE_PAE_PG_MASK
81	# define GST_PT_SHIFT X86_PT_PAE_SHIFT
82	# define GST_PT_MASK X86_PT_PAE_MASK
83	#endif
84
85
86	/*******************************************************************************
87	* Internal Functions *
88	*******************************************************************************/
89	__BEGIN_DECLS
90	PGM_GST_DECL(int, GetPage)(PVM pVM, RTGCUINTPTR GCPtr, uint64_t *pfFlags, PRTGCPHYS pGCPhys);
91	PGM_GST_DECL(int, ModifyPage)(PVM pVM, RTGCUINTPTR GCPtr, size_t cb, uint64_t fFlags, uint64_t fMask);
92	PGM_GST_DECL(int, GetPDE)(PVM pVM, RTGCUINTPTR GCPtr, PX86PDEPAE pPDE);
93	PGM_GST_DECL(int, MapCR3)(PVM pVM, RTGCPHYS GCPhysCR3);
94	PGM_GST_DECL(int, UnmapCR3)(PVM pVM);
95	PGM_GST_DECL(int, MonitorCR3)(PVM pVM, RTGCPHYS GCPhysCR3);
96	PGM_GST_DECL(int, UnmonitorCR3)(PVM pVM);
97	PGM_GST_DECL(bool, HandlerVirtualUpdate)(PVM pVM, uint32_t cr4);
98	__END_DECLS
99
100
101
102	/**
103	* Gets effective Guest OS page information.
104	*
105	* When GCPtr is in a big page, the function will return as if it was a normal
106	* 4KB page. If the need for distinguishing between big and normal page becomes
107	* necessary at a later point, a PGMGstGetPage Ex() will be created for that
108	* purpose.
109	*
110	* @returns VBox status.
111	* @param pVM VM Handle.
112	* @param GCPtr Guest Context virtual address of the page. Page aligned!
113	* @param pfFlags Where to store the flags. These are X86_PTE_*, even for big pages.
114	* @param pGCPhys Where to store the GC physical address of the page.
115	* This is page aligned. The fact that the
116	*/
117	PGM_GST_DECL(int, GetPage)(PVM pVM, RTGCUINTPTR GCPtr, uint64_t *pfFlags, PRTGCPHYS pGCPhys)
118	{
119	#if PGM_GST_TYPE == PGM_TYPE_REAL \
120	\|\| PGM_GST_TYPE == PGM_TYPE_PROT
121	/*
122	* Fake it.
123	*/
124	if (pfFlags)
125	*pfFlags = X86_PTE_P \| X86_PTE_RW \| X86_PTE_US;
126	if (pGCPhys)
127	*pGCPhys = GCPtr & PAGE_BASE_GC_MASK;
128	return VINF_SUCCESS;
129
130	#elif PGM_GST_TYPE == PGM_TYPE_32BIT \
131	\|\| PGM_GST_TYPE == PGM_TYPE_PAE \
132	\|\| PGM_GST_TYPE == PGM_TYPE_AMD64
133
134	#if PGM_GST_TYPE == PGM_TYPE_AMD64
135	/* later */
136	AssertFailed();
137	return VERR_NOT_IMPLEMENTED;
138	#endif
139
140
141	/*
142	* Get the PDE.
143	*/
144	#if PGM_GST_TYPE == PGM_TYPE_32BIT
145	const X86PDE Pde = CTXSUFF(pVM->pgm.s.pGuestPD)->a[GCPtr >> X86_PD_SHIFT];
146	#else /* PAE */
147	X86PDEPAE Pde;
148	Pde.u = pgmGstGetPaePDE(&pVM->pgm.s, GCPtr);
149	#endif
150
151	/*
152	* Lookup the page.
153	*/
154	if (!Pde.n.u1Present)
155	return VERR_PAGE_TABLE_NOT_PRESENT;
156
157	if ( !Pde.b.u1Size
158	\|\| !(CPUMGetGuestCR4(pVM) & X86_CR4_PSE))
159	{
160	PGSTPT pPT;
161	int rc = PGM_GCPHYS_2_PTR(pVM, Pde.u & GST_PDE_PG_MASK, &pPT);
162	if (VBOX_FAILURE(rc))
163	return rc;
164
165	/*
166	* Get PT entry and check presentness.
167	*/
168	const GSTPTE Pte = pPT->a[(GCPtr >> GST_PT_SHIFT) & GST_PT_MASK];
169	if (!Pte.n.u1Present)
170	return VERR_PAGE_NOT_PRESENT;
171
172	/*
173	* Store the result.
174	* RW and US flags depend on all levels (bitwise AND) - except for legacy PAE
175	* where the PDPE is simplified.
176	*/
177	if (pfFlags)
178	*pfFlags = (Pte.u & ~GST_PTE_PG_MASK)
179	& ((Pde.u & (X86_PTE_RW \| X86_PTE_US)) \| ~(uint64_t)(X86_PTE_RW \| X86_PTE_US));
180	if (pGCPhys)
181	*pGCPhys = Pte.u & GST_PTE_PG_MASK;
182	}
183	else
184	{
185	/*
186	* Map big to 4k PTE and store the result
187	*/
188	if (pfFlags)
189	*pfFlags = (Pde.u & ~(GST_PTE_PG_MASK \| X86_PTE_PAT))
190	\| ((Pde.u & X86_PDE4M_PAT) >> X86_PDE4M_PAT_SHIFT);
191	if (pGCPhys)
192	pGCPhys = (Pde.u & GST_PDE4M_PG_MASK) \| (GCPtr & (~GST_PDE4M_PG_MASK ^ ~GST_PTE_PG_MASK)); /* @todo pse36 */
193	}
194	return VINF_SUCCESS;
195	#else
196	/* something else... */
197	return VERR_NOT_SUPPORTED;
198	#endif
199	}
200
201
202	/**
203	* Modify page flags for a range of pages in the guest's tables
204	*
205	* The existing flags are ANDed with the fMask and ORed with the fFlags.
206	*
207	* @returns VBox status code.
208	* @param pVM VM handle.
209	* @param GCPtr Virtual address of the first page in the range. Page aligned!
210	* @param cb Size (in bytes) of the page range to apply the modification to. Page aligned!
211	* @param fFlags The OR mask - page flags X86_PTE_*, excluding the page mask of course.
212	* @param fMask The AND mask - page flags X86_PTE_*.
213	*/
214	PGM_GST_DECL(int, ModifyPage)(PVM pVM, RTGCUINTPTR GCPtr, size_t cb, uint64_t fFlags, uint64_t fMask)
215	{
216	#if PGM_GST_TYPE == PGM_TYPE_32BIT \
217	\|\| PGM_GST_TYPE == PGM_TYPE_PAE \
218	\|\| PGM_GST_TYPE == PGM_TYPE_AMD64
219
220	#if PGM_GST_TYPE == PGM_TYPE_AMD64
221	/* later */
222	AssertFailed();
223	return VERR_NOT_IMPLEMENTED;
224	#endif
225
226	for (;;)
227	{
228	/*
229	* Get the PD entry.
230	*/
231	#if PGM_GST_TYPE == PGM_TYPE_32BIT
232	PX86PDE pPde = &CTXSUFF(pVM->pgm.s.pGuestPD)->a[GCPtr >> X86_PD_SHIFT];
233	#else /* PAE */
234	PX86PDEPAE pPde = pgmGstGetPaePDEPtr(&pVM->pgm.s, GCPtr);
235	Assert(pPde);
236	if (!pPde)
237	return VERR_PAGE_TABLE_NOT_PRESENT;
238	#endif
239	GSTPDE Pde = *pPde;
240	Assert(Pde.n.u1Present);
241	if (!Pde.n.u1Present)
242	return VERR_PAGE_TABLE_NOT_PRESENT;
243
244	if ( !Pde.b.u1Size
245	\|\| !(CPUMGetGuestCR4(pVM) & X86_CR4_PSE))
246	{
247	/*
248	* 4KB Page table
249	*
250	* Walk page tables and pages till we're done.
251	*/
252	PGSTPT pPT;
253	int rc = PGM_GCPHYS_2_PTR(pVM, Pde.u & GST_PDE_PG_MASK, &pPT);
254	if (VBOX_FAILURE(rc))
255	return rc;
256
257	unsigned iPTE = (GCPtr >> GST_PT_SHIFT) & GST_PT_MASK;
258	while (iPTE < ELEMENTS(pPT->a))
259	{
260	GSTPTE Pte = pPT->a[iPTE];
261	Pte.u = (Pte.u & (fMask \| X86_PTE_PAE_PG_MASK))
262	\| (fFlags & ~GST_PTE_PG_MASK);
263	pPT->a[iPTE] = Pte;
264
265	/* next page */
266	cb -= PAGE_SIZE;
267	if (!cb)
268	return VINF_SUCCESS;
269	GCPtr += PAGE_SIZE;
270	iPTE++;
271	}
272	}
273	else
274	{
275	/*
276	* 4MB Page table
277	*/
278	Pde.u = (Pde.u & (fMask \| ((fMask & X86_PTE_PAT) << X86_PDE4M_PAT_SHIFT) \| X86_PDE4M_PAE_PG_MASK \| X86_PDE4M_PS)) /** @todo pse36 */
279	\| (fFlags & ~GST_PTE_PG_MASK)
280	\| ((fFlags & X86_PTE_PAT) << X86_PDE4M_PAT_SHIFT);
281	*pPde = Pde;
282
283	/* advance */
284	const unsigned cbDone = GST_BIG_PAGE_SIZE - (GCPtr & GST_BIG_PAGE_OFFSET_MASK);
285	if (cbDone >= cb)
286	return VINF_SUCCESS;
287	cb -= cbDone;
288	GCPtr += cbDone;
289	}
290	}
291
292	#else
293	/* real / protected mode. */
294	AssertFailed();
295	return VERR_NOT_SUPPORTED;
296	#endif
297	}
298
299
300	/**
301	* Retrieve guest PDE information
302	*
303	* @returns VBox status code.
304	* @param pVM The virtual machine.
305	* @param GCPtr Guest context pointer
306	* @param pPDE Pointer to guest PDE structure
307	*/
308	PGM_GST_DECL(int, GetPDE)(PVM pVM, RTGCUINTPTR GCPtr, PX86PDEPAE pPDE)
309	{
310	#if PGM_GST_TYPE == PGM_TYPE_32BIT \
311	\|\| PGM_GST_TYPE == PGM_TYPE_PAE \
312	\|\| PGM_GST_TYPE == PGM_TYPE_AMD64
313
314	#if PGM_GST_TYPE == PGM_TYPE_AMD64
315	/* later */
316	AssertFailed();
317	return VERR_NOT_IMPLEMENTED;
318	#endif
319
320	# if PGM_GST_TYPE == PGM_TYPE_32BIT
321	X86PDE Pde;
322	Pde = CTXSUFF(pVM->pgm.s.pGuestPD)->a[GCPtr >> GST_PD_SHIFT];
323	# else
324	X86PDEPAE Pde;
325	Pde.u = pgmGstGetPaePDE(&pVM->pgm.s, GCPtr);
326	# endif
327
328	pPDE->u = (X86PGPAEUINT)Pde.u;
329	return VINF_SUCCESS;
330	#else
331	AssertFailed();
332	return VERR_NOT_IMPLEMENTED;
333	#endif
334	}
335
336
337
338	/**
339	* Maps the CR3 into HMA in GC and locate it in HC.
340	*
341	* @returns VBox status, no specials.
342	* @param pVM VM handle.
343	* @param GCPhysCR3 The physical address in the CR3 register.
344	*/
345	PGM_GST_DECL(int, MapCR3)(PVM pVM, RTGCPHYS GCPhysCR3)
346	{
347	#if PGM_GST_TYPE == PGM_TYPE_32BIT \
348	\|\| PGM_GST_TYPE == PGM_TYPE_PAE \
349	\|\| PGM_GST_TYPE == PGM_TYPE_AMD64
350	/*
351	* Map the page CR3 points at.
352	*/
353	RTHCPHYS HCPhysGuestCR3;
354	RTHCPTR HCPtrGuestCR3;
355	int rc = PGMRamGCPhys2HCPtrAndHCPhysWithFlags(&pVM->pgm.s, GCPhysCR3, &HCPtrGuestCR3, &HCPhysGuestCR3);
356	if (VBOX_SUCCESS(rc))
357	{
358	rc = PGMMap(pVM, (RTGCUINTPTR)pVM->pgm.s.GCPtrCR3Mapping, HCPhysGuestCR3 & X86_PTE_PAE_PG_MASK, PAGE_SIZE, 0);
359	if (VBOX_SUCCESS(rc))
360	{
361	PGM_INVL_PG(pVM->pgm.s.GCPtrCR3Mapping);
362	#if PGM_GST_TYPE == PGM_TYPE_32BIT
363	pVM->pgm.s.pGuestPDHC = (HCPTRTYPE(PX86PD))HCPtrGuestCR3;
364	pVM->pgm.s.pGuestPDGC = (GCPTRTYPE(PX86PD))pVM->pgm.s.GCPtrCR3Mapping;
365
366	#elif PGM_GST_TYPE == PGM_TYPE_PAE
367	const unsigned off = GCPhysCR3 & X86_CR3_PAE_PAGE_MASK;
368	pVM->pgm.s.pGstPaePDPTRHC = (HCPTRTYPE(PX86PDPTR))((RTHCUINTPTR)HCPtrGuestCR3 \| off);
369	pVM->pgm.s.pGstPaePDPTRGC = (GCPTRTYPE(PX86PDPTR))((RTGCUINTPTR)pVM->pgm.s.GCPtrCR3Mapping \| off);
370
371	/*
372	* Map the 4 PDs too.
373	*/
374	RTGCUINTPTR GCPtr = (RTGCUINTPTR)pVM->pgm.s.GCPtrCR3Mapping + PAGE_SIZE;
375	for (unsigned i = 0; i < 4; i++, GCPtr += PAGE_SIZE)
376	{
377	if (pVM->pgm.s.CTXSUFF(pGstPaePDPTR)->a[i].n.u1Present)
378	{
379	RTHCPTR HCPtr;
380	RTHCPHYS HCPhys;
381	RTGCPHYS GCPhys = pVM->pgm.s.CTXSUFF(pGstPaePDPTR)->a[i].u & X86_PDPE_PG_MASK;
382	int rc2 = PGMRamGCPhys2HCPtrAndHCPhysWithFlags(&pVM->pgm.s, GCPhys, &HCPtr, &HCPhys);
383	if (VBOX_SUCCESS(rc2))
384	{
385	rc = PGMMap(pVM, GCPtr, HCPhys & X86_PTE_PAE_PG_MASK, PAGE_SIZE, 0);
386	AssertRCReturn(rc, rc);
387	pVM->pgm.s.apGstPaePDsHC[i] = (HCPTRTYPE(PX86PDPAE))HCPtr;
388	pVM->pgm.s.apGstPaePDsGC[i] = (GCPTRTYPE(PX86PDPAE))GCPtr;
389	pVM->pgm.s.aGCPhysGstPaePDs[i] = GCPhys;
390	PGM_INVL_PG(GCPtr);
391	continue;
392	}
393	AssertMsgFailed(("pgmR3Gst32BitMapCR3: rc2=%d GCPhys=%RGp i=%d\n", rc2, GCPhys, i));
394	}
395
396	pVM->pgm.s.apGstPaePDsHC[i] = 0;
397	pVM->pgm.s.apGstPaePDsGC[i] = 0;
398	pVM->pgm.s.aGCPhysGstPaePDs[i] = NIL_RTGCPHYS;
399	PGM_INVL_PG(GCPtr);
400	}
401
402	#else /* PGM_GST_TYPE == PGM_TYPE_AMD64 */
403	rc = VERR_NOT_IMPLEMENTED;
404	#endif
405	}
406	}
407	else
408	AssertMsgFailed(("rc=%Vrc GCPhysGuestPD=%VGp\n", rc, GCPhysCR3));
409
410	#else /* prot/real mode stub */
411	int rc = VINF_SUCCESS;
412	#endif
413	return rc;
414	}
415
416
417	/**
418	* Unmaps the CR3.
419	*
420	* @returns VBox status, no specials.
421	* @param pVM VM handle.
422	* @param GCPhysCR3 The physical address in the CR3 register.
423	*/
424	PGM_GST_DECL(int, UnmapCR3)(PVM pVM)
425	{
426	int rc = VINF_SUCCESS;
427	#if PGM_GST_TYPE == PGM_TYPE_32BIT
428	pVM->pgm.s.pGuestPDHC = 0;
429	pVM->pgm.s.pGuestPDGC = 0;
430
431	#elif PGM_GST_TYPE == PGM_TYPE_PAE
432	pVM->pgm.s.pGstPaePDPTRHC = 0;
433	pVM->pgm.s.pGstPaePDPTRGC = 0;
434
435	#elif PGM_GST_TYPE == PGM_TYPE_AMD64
436	//#error not implemented
437	rc = VERR_NOT_IMPLEMENTED;
438
439	#else /* prot/real mode stub */
440	/* nothing to do */
441	#endif
442	return rc;
443	}
444
445
446	#undef LOG_GROUP
447	#define LOG_GROUP LOG_GROUP_PGM_POOL
448
449	/**
450	* Registers physical page monitors for the necessary paging
451	* structures to detect conflicts with our guest mappings.
452	*
453	* This is always called after mapping CR3.
454	* This is never called with fixed mappings.
455	*
456	* @returns VBox status, no specials.
457	* @param pVM VM handle.
458	* @param GCPhysCR3 The physical address in the CR3 register.
459	*/
460	PGM_GST_DECL(int, MonitorCR3)(PVM pVM, RTGCPHYS GCPhysCR3)
461	{
462	Assert(!pVM->pgm.s.fMappingsFixed);
463	int rc = VINF_SUCCESS;
464
465	#if PGM_GST_TYPE == PGM_TYPE_32BIT \
466	\|\| PGM_GST_TYPE == PGM_TYPE_PAE \
467	\|\| PGM_GST_TYPE == PGM_TYPE_AMD64
468
469	/*
470	* Register/Modify write phys handler for guest's CR3 if it changed.
471	*/
472	if (pVM->pgm.s.GCPhysGstCR3Monitored != GCPhysCR3)
473	{
474	# ifndef PGMPOOL_WITH_MIXED_PT_CR3
475	const unsigned cbCR3Stuff = PGM_GST_TYPE == PGM_TYPE_PAE ? 32 : PAGE_SIZE;
476	if (pVM->pgm.s.GCPhysGstCR3Monitored != NIL_RTGCPHYS)
477	rc = PGMHandlerPhysicalModify(pVM, pVM->pgm.s.GCPhysGstCR3Monitored, GCPhysCR3, GCPhysCR3 + cbCR3Stuff - 1);
478	else
479	rc = PGMHandlerPhysicalRegisterEx(pVM, PGMPHYSHANDLERTYPE_PHYSICAL_WRITE, GCPhysCR3, GCPhysCR3 + cbCR3Stuff - 1,
480	pVM->pgm.s.pfnHCGstWriteHandlerCR3, 0,
481	pVM->pgm.s.pfnR0GstWriteHandlerCR3, 0,
482	pVM->pgm.s.pfnGCGstWriteHandlerCR3, 0,
483	pVM->pgm.s.pszHCGstWriteHandlerCR3);
484	# else /* PGMPOOL_WITH_MIXED_PT_CR3 */
485	rc = pgmPoolMonitorMonitorCR3(pVM->pgm.s.CTXSUFF(pPool),
486	pVM->pgm.s.enmShadowMode == PGMMODE_PAE
487	\|\| pVM->pgm.s.enmShadowMode == PGMMODE_PAE_NX
488	? PGMPOOL_IDX_PAE_PD
489	: PGMPOOL_IDX_PD,
490	GCPhysCR3);
491	# endif /* PGMPOOL_WITH_MIXED_PT_CR3 */
492	if (VBOX_FAILURE(rc))
493	{
494	AssertMsgFailed(("PGMHandlerPhysicalModify/PGMR3HandlerPhysicalRegister failed, rc=%Rrc GCPhysGstCR3Monitored=%RGp GCPhysCR3=%RGp\n",
495	rc, pVM->pgm.s.GCPhysGstCR3Monitored, GCPhysCR3));
496	return rc;
497	}
498	pVM->pgm.s.GCPhysGstCR3Monitored = GCPhysCR3;
499	}
500
501	#if PGM_GST_TYPE == PGM_TYPE_PAE
502	AssertFatalFailed();
503	# if 0 /* later */
504	/*
505	* Do the 4 PDs.
506	*/
507	for (unsigned i = 0; i < 4; i++)
508	{
509	if (pVM->pgm.s.pGstPaePDPTRHC->a[i].n.u1Present)
510	{
511	RTGCPHYS GCPhys = pVM->pgm.s.pGstPaePDPTRHC->a[i].u & X86_PDPE_PG_MASK;
512	if (pVM->pgm.s.aGCPhysGstPaePDsMonitored[i] != GCPhys)
513	{
514	if (pVM->pgm.s.aGCPhysGstPaePDsMonitored[i] != NIL_RTGCPHYS)
515	rc = PGMHandlerPhysicalModify(pVM, pVM->pgm.s.aGCPhysGstPaePDsMonitored[i], GCPhys, GCPhys + PAGE_SIZE - 1);
516	else
517	rc = PGMR3HandlerPhysicalRegister(pVM, PGMPHYSHANDLERTYPE_PHYSICAL_WRITE, GCPhys, GCPhys + PAGE_SIZE - 1,
518	pgmR3GstPaePDWriteHandler, NULL,
519	NULL, "pgmGCGstPaePDWriteHandler", 0,
520	"Guest PD write access handler");
521	if (VBOX_SUCCESS(rc))
522	pVM->pgm.s.aGCPhysGstPaePDsMonitored[i] = GCPhys;
523	}
524	}
525	else if (pVM->pgm.s.aGCPhysGstPaePDsMonitored[i] != NIL_RTGCPHYS)
526	{
527	rc = PGMHandlerPhysicalDeregister(pVM, pVM->pgm.s.aGCPhysGstPaePDsMonitored[i]);
528	AssertRC(rc);
529	pVM->pgm.s.aGCPhysGstPaePDsMonitored[i] = NIL_RTGCPHYS;
530	}
531	}
532	# endif
533	#endif /* PGM_GST_TYPE == PGM_TYPE_PAE */
534
535	#else
536	/* prot/real mode stub */
537
538	#endif
539	return rc;
540	}
541
542	/**
543	* Deregisters any physical page monitors installed by MonitorCR3.
544	*
545	* @returns VBox status code, no specials.
546	* @param pVM The VM handle.
547	*/
548	PGM_GST_DECL(int, UnmonitorCR3)(PVM pVM)
549	{
550	int rc = VINF_SUCCESS;
551
552	#if PGM_GST_TYPE == PGM_TYPE_32BIT \
553	\|\| PGM_GST_TYPE == PGM_TYPE_PAE \
554	\|\| PGM_GST_TYPE == PGM_TYPE_AMD64
555
556	/*
557	* Deregister the access handlers.
558	*
559	* PGMSyncCR3 will reinstall it if required and PGMSyncCR3 will be executed
560	* before we enter GC again.
561	*/
562	if (pVM->pgm.s.GCPhysGstCR3Monitored != NIL_RTGCPHYS)
563	{
564	# ifndef PGMPOOL_WITH_MIXED_PT_CR3
565	rc = PGMHandlerPhysicalDeregister(pVM, pVM->pgm.s.GCPhysGstCR3Monitored);
566	AssertRCReturn(rc, rc);
567	# else /* PGMPOOL_WITH_MIXED_PT_CR3 */
568	rc = pgmPoolMonitorUnmonitorCR3(pVM->pgm.s.CTXSUFF(pPool),
569	pVM->pgm.s.enmShadowMode == PGMMODE_PAE
570	\|\| pVM->pgm.s.enmShadowMode == PGMMODE_PAE_NX
571	? PGMPOOL_IDX_PAE_PD
572	: PGMPOOL_IDX_PD);
573	AssertRCReturn(rc, rc);
574	# endif /* PGMPOOL_WITH_MIXED_PT_CR3 */
575	pVM->pgm.s.GCPhysGstCR3Monitored = NIL_RTGCPHYS;
576	}
577
578	# if PGM_GST_TYPE == PGM_TYPE_PAE
579	/* The 4 PDs. */
580	for (unsigned i = 0; i < 4; i++)
581	if (pVM->pgm.s.aGCPhysGstPaePDsMonitored[i] != NIL_RTGCPHYS)
582	{
583	int rc2 = PGMHandlerPhysicalDeregister(pVM, pVM->pgm.s.aGCPhysGstPaePDsMonitored[i]);
584	AssertRC(rc2);
585	if (VBOX_FAILURE(rc2))
586	rc = rc2;
587	pVM->pgm.s.aGCPhysGstPaePDsMonitored[i] = NIL_RTGCPHYS;
588	}
589	# endif
590
591	#else
592	/* prot/real mode stub */
593	#endif
594	return rc;
595
596	}
597
598	#undef LOG_GROUP
599	#define LOG_GROUP LOG_GROUP_PGM
600
601
602	#if PGM_GST_TYPE == PGM_TYPE_32BIT \
603	\|\| PGM_GST_TYPE == PGM_TYPE_PAE \
604	\|\| PGM_GST_TYPE == PGM_TYPE_AMD64
605	/**
606	* Updates one virtual handler range.
607	*
608	* @returns 0
609	* @param pNode Pointer to a PGMVIRTHANDLER.
610	* @param pvUser Pointer to a PGMVHUARGS structure (see PGM.cpp).
611	*/
612	static DECLCALLBACK(int) PGM_GST_NAME(VirtHandlerUpdateOne)(PAVLROGCPTRNODECORE pNode, void *pvUser)
613	{
614	PPGMVIRTHANDLER pCur = (PPGMVIRTHANDLER)pNode;
615	PPGMHVUSTATE pState = (PPGMHVUSTATE)pvUser;
616
617	#if PGM_GST_TYPE == PGM_TYPE_32BIT
618	PX86PD pPDSrc = pState->pVM->pgm.s.CTXSUFF(pGuestPD);
619	#endif
620
621	RTGCUINTPTR GCPtr = (RTUINTPTR)pCur->GCPtr;
622	#if PGM_GST_MODE != PGM_MODE_AMD64
623	/* skip all stuff above 4GB if not AMD64 mode. */
624	if (GCPtr >= _4GB)
625	return 0;
626	#endif
627
628	unsigned fFlags;
629	switch (pCur->enmType)
630	{
631	case PGMVIRTHANDLERTYPE_EIP:
632	case PGMVIRTHANDLERTYPE_NORMAL: fFlags = MM_RAM_FLAGS_VIRTUAL_HANDLER; break;
633	case PGMVIRTHANDLERTYPE_WRITE: fFlags = MM_RAM_FLAGS_VIRTUAL_HANDLER \| MM_RAM_FLAGS_VIRTUAL_WRITE; break;
634	case PGMVIRTHANDLERTYPE_ALL: fFlags = MM_RAM_FLAGS_VIRTUAL_HANDLER \| MM_RAM_FLAGS_VIRTUAL_ALL; break;
635	/* hypervisor handlers need no flags and wouldn't have nowhere to put them in any case. */
636	case PGMVIRTHANDLERTYPE_HYPERVISOR:
637	return 0;
638	}
639
640	unsigned offPage = GCPtr & PAGE_OFFSET_MASK;
641	unsigned iPage = 0;
642	while (iPage < pCur->cPages)
643	{
644	#if PGM_GST_TYPE == PGM_TYPE_32BIT
645	X86PDE Pde = pPDSrc->a[GCPtr >> X86_PD_SHIFT];
646	#else
647	X86PDEPAE Pde;
648	Pde.u = pgmGstGetPaePDE(&pState->pVM->pgm.s, GCPtr);
649	#endif
650	if (Pde.n.u1Present)
651	{
652	if (!Pde.b.u1Size \|\| !(pState->cr4 & X86_CR4_PSE))
653	{
654	/*
655	* Normal page table.
656	*/
657	PGSTPT pPT;
658	int rc = PGM_GCPHYS_2_PTR(pState->pVM, Pde.u & GST_PDE_PG_MASK, &pPT);
659	if (VBOX_SUCCESS(rc))
660	{
661	for (unsigned iPTE = (GCPtr >> GST_PT_SHIFT) & GST_PT_MASK;
662	iPTE < ELEMENTS(pPT->a) && iPage < pCur->cPages;
663	iPTE++, iPage++, GCPtr += PAGE_SIZE, offPage = 0)
664	{
665	GSTPTE Pte = pPT->a[iPTE];
666	RTGCPHYS GCPhysNew;
667	if (Pte.n.u1Present)
668	GCPhysNew = (RTGCPHYS)(pPT->a[iPTE].u & GST_PTE_PG_MASK) + offPage;
669	else
670	GCPhysNew = NIL_RTGCPHYS;
671	if (pCur->aPhysToVirt[iPage].Core.Key != GCPhysNew)
672	{
673	if (pCur->aPhysToVirt[iPage].Core.Key != NIL_RTGCPHYS)
674	pgmHandlerVirtualClearPage(&pState->pVM->pgm.s, pCur, iPage);
675	#ifdef VBOX_STRICT_PGM_HANDLER_VIRTUAL
676	AssertReleaseMsg(!pCur->aPhysToVirt[iPage].offNextAlias,
677	("{.Core.Key=%VGp, .Core.KeyLast=%VGp, .offVirtHandler=%#RX32, .offNextAlias=%#RX32} GCPhysNew=%VGp\n",
678	pCur->aPhysToVirt[iPage].Core.Key, pCur->aPhysToVirt[iPage].Core.KeyLast,
679	pCur->aPhysToVirt[iPage].offVirtHandler, pCur->aPhysToVirt[iPage].offNextAlias, GCPhysNew));
680	#endif
681	pCur->aPhysToVirt[iPage].Core.Key = GCPhysNew;
682	pState->fTodo \|= PGM_SYNC_UPDATE_PAGE_BIT_VIRTUAL;
683	}
684	}
685	}
686	else
687	{
688	/* not-present. */
689	offPage = 0;
690	AssertRC(rc);
691	for (unsigned iPTE = (GCPtr >> GST_PT_SHIFT) & GST_PT_MASK;
692	iPTE < ELEMENTS(pPT->a) && iPage < pCur->cPages;
693	iPTE++, iPage++, GCPtr += PAGE_SIZE)
694	{
695	if (pCur->aPhysToVirt[iPage].Core.Key != NIL_RTGCPHYS)
696	{
697	pgmHandlerVirtualClearPage(&pState->pVM->pgm.s, pCur, iPage);
698	#ifdef VBOX_STRICT_PGM_HANDLER_VIRTUAL
699	AssertReleaseMsg(!pCur->aPhysToVirt[iPage].offNextAlias,
700	("{.Core.Key=%VGp, .Core.KeyLast=%VGp, .offVirtHandler=%#RX32, .offNextAlias=%#RX32}\n",
701	pCur->aPhysToVirt[iPage].Core.Key, pCur->aPhysToVirt[iPage].Core.KeyLast,
702	pCur->aPhysToVirt[iPage].offVirtHandler, pCur->aPhysToVirt[iPage].offNextAlias));
703	#endif
704	pCur->aPhysToVirt[iPage].Core.Key = NIL_RTGCPHYS;
705	pState->fTodo \|= PGM_SYNC_UPDATE_PAGE_BIT_VIRTUAL;
706	}
707	}
708	}
709	}
710	else
711	{
712	/*
713	* 2/4MB page.
714	*/
715	RTGCPHYS GCPhys = (RTGCPHYS)(Pde.u & GST_PDE_PG_MASK);
716	for (unsigned i4KB = (GCPtr >> GST_PT_SHIFT) & GST_PT_MASK;
717	i4KB < PAGE_SIZE / sizeof(GSTPDE) && iPage < pCur->cPages;
718	i4KB++, iPage++, GCPtr += PAGE_SIZE, offPage = 0)
719	{
720	RTGCPHYS GCPhysNew = GCPhys + (i4KB << PAGE_SHIFT) + offPage;
721	if (pCur->aPhysToVirt[iPage].Core.Key != GCPhysNew)
722	{
723	if (pCur->aPhysToVirt[iPage].Core.Key != NIL_RTGCPHYS)
724	pgmHandlerVirtualClearPage(&pState->pVM->pgm.s, pCur, iPage);
725	#ifdef VBOX_STRICT_PGM_HANDLER_VIRTUAL
726	AssertReleaseMsg(!pCur->aPhysToVirt[iPage].offNextAlias,
727	("{.Core.Key=%VGp, .Core.KeyLast=%VGp, .offVirtHandler=%#RX32, .offNextAlias=%#RX32} GCPhysNew=%VGp\n",
728	pCur->aPhysToVirt[iPage].Core.Key, pCur->aPhysToVirt[iPage].Core.KeyLast,
729	pCur->aPhysToVirt[iPage].offVirtHandler, pCur->aPhysToVirt[iPage].offNextAlias, GCPhysNew));
730	#endif
731	pCur->aPhysToVirt[iPage].Core.Key = GCPhysNew;
732	pState->fTodo \|= PGM_SYNC_UPDATE_PAGE_BIT_VIRTUAL;
733	}
734	}
735	} /* pde type */
736	}
737	else
738	{
739	/* not-present. */
740	for (unsigned cPages = (GST_PT_MASK + 1) - ((GCPtr >> GST_PT_SHIFT) & GST_PT_MASK);
741	cPages && iPage < pCur->cPages;
742	iPage++, GCPtr += PAGE_SIZE)
743	{
744	if (pCur->aPhysToVirt[iPage].Core.Key != NIL_RTGCPHYS)
745	{
746	pgmHandlerVirtualClearPage(&pState->pVM->pgm.s, pCur, iPage);
747	pCur->aPhysToVirt[iPage].Core.Key = NIL_RTGCPHYS;
748	pState->fTodo \|= PGM_SYNC_UPDATE_PAGE_BIT_VIRTUAL;
749	}
750	}
751	offPage = 0;
752	}
753	} /* for pages in virtual mapping. */
754
755	return 0;
756	}
757	#endif /* 32BIT, PAE and AMD64 */
758
759
760	/**
761	* Updates the virtual page access handlers.
762	*
763	* @returns true if bits were flushed.
764	* @returns false if bits weren't flushed.
765	* @param pVM VM handle.
766	* @param pPDSrc The page directory.
767	* @param cr4 The cr4 register value.
768	*/
769	PGM_GST_DECL(bool, HandlerVirtualUpdate)(PVM pVM, uint32_t cr4)
770	{
771	#if PGM_GST_TYPE == PGM_TYPE_32BIT \
772	\|\| PGM_GST_TYPE == PGM_TYPE_PAE \
773	\|\| PGM_GST_TYPE == PGM_TYPE_AMD64
774	#if PGM_GST_TYPE == PGM_TYPE_AMD64
775	AssertFailed();
776	#endif
777
778	/** @todo
779	* In theory this is not sufficient: the guest can change a single page in a range with invlpg
780	*/
781
782	/*
783	* Resolve any virtual address based access handlers to GC physical addresses.
784	* This should be fairly quick.
785	*/
786	PGMHVUSTATE State;
787
788	pgmLock(pVM);
789	STAM_PROFILE_START(&pVM->pgm.s.CTXMID(Stat,SyncCR3HandlerVirtualUpdate), a);
790	State.pVM = pVM;
791	State.fTodo = pVM->pgm.s.fSyncFlags;
792	State.cr4 = cr4;
793	RTAvlroGCPtrDoWithAll(&pVM->pgm.s.CTXSUFF(pTrees)->VirtHandlers, true, PGM_GST_NAME(VirtHandlerUpdateOne), &State);
794	STAM_PROFILE_STOP(&pVM->pgm.s.CTXMID(Stat,SyncCR3HandlerVirtualUpdate), a);
795
796
797	/*
798	* Set / reset bits?
799	*/
800	if (State.fTodo & PGM_SYNC_UPDATE_PAGE_BIT_VIRTUAL)
801	{
802	STAM_PROFILE_START(&pVM->pgm.s.CTXMID(Stat,SyncCR3HandlerVirtualReset), b);
803	Log(("pgmR3VirtualHandlersUpdate: resets bits\n"));
804	RTAvlroGCPtrDoWithAll(&pVM->pgm.s.CTXSUFF(pTrees)->VirtHandlers, true, pgmHandlerVirtualResetOne, pVM);
805	pVM->pgm.s.fSyncFlags &= ~PGM_SYNC_UPDATE_PAGE_BIT_VIRTUAL;
806	STAM_PROFILE_STOP(&pVM->pgm.s.CTXMID(Stat,SyncCR3HandlerVirtualReset), b);
807	}
808	pgmUnlock(pVM);
809
810	return !!(State.fTodo & PGM_SYNC_UPDATE_PAGE_BIT_VIRTUAL);
811
812	#else /* real / protected */
813	return false;
814	#endif
815	}
816

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source: vbox/trunk/src/VBox/VMM/VMMAll/PGMAllGst.h@ 847

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