PGMAllGst.h@ 65757

Last change on this file since 65757 was 65531, checked in by vboxsync, 8 years ago
PGM: Put back r113092 & r113134 (revered in r113137).
Property svn:eol-style set to `native` Property svn:keywords set to `Id`
File size: 26.4 KB

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1	/* $Id: PGMAllGst.h 65531 2017-01-31 10:26:35Z vboxsync $ */
2	/** @file
3	* VBox - Page Manager, Guest Paging Template - All context code.
4	*/
5
6	/*
7	* Copyright (C) 2006-2016 Oracle Corporation
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.virtualbox.org. This file is free software;
11	* you can redistribute it and/or modify it under the terms of the GNU
12	* General Public License (GPL) as published by the Free Software
13	* Foundation, in version 2 as it comes in the "COPYING" file of the
14	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16	*/
17
18
19	/*******************************************************************************
20	* Internal Functions *
21	*******************************************************************************/
22	RT_C_DECLS_BEGIN
23	#if PGM_GST_TYPE == PGM_TYPE_32BIT \
24	\|\| PGM_GST_TYPE == PGM_TYPE_PAE \
25	\|\| PGM_GST_TYPE == PGM_TYPE_AMD64
26	static int PGM_GST_NAME(Walk)(PVMCPU pVCpu, RTGCPTR GCPtr, PGSTPTWALK pWalk);
27	#endif
28	PGM_GST_DECL(int, GetPage)(PVMCPU pVCpu, RTGCPTR GCPtr, uint64_t *pfFlags, PRTGCPHYS pGCPhys);
29	PGM_GST_DECL(int, ModifyPage)(PVMCPU pVCpu, RTGCPTR GCPtr, size_t cb, uint64_t fFlags, uint64_t fMask);
30	PGM_GST_DECL(int, GetPDE)(PVMCPU pVCpu, RTGCPTR GCPtr, PX86PDEPAE pPDE);
31	PGM_GST_DECL(bool, HandlerVirtualUpdate)(PVM pVM, uint32_t cr4);
32	RT_C_DECLS_END
33
34
35	#if PGM_GST_TYPE == PGM_TYPE_32BIT \
36	\|\| PGM_GST_TYPE == PGM_TYPE_PAE \
37	\|\| PGM_GST_TYPE == PGM_TYPE_AMD64
38
39
40	DECLINLINE(int) PGM_GST_NAME(WalkReturnNotPresent)(PVMCPU pVCpu, PGSTPTWALK pWalk, int iLevel)
41	{
42	NOREF(iLevel); NOREF(pVCpu);
43	pWalk->Core.fNotPresent = true;
44	pWalk->Core.uLevel = (uint8_t)iLevel;
45	return VERR_PAGE_TABLE_NOT_PRESENT;
46	}
47
48	DECLINLINE(int) PGM_GST_NAME(WalkReturnBadPhysAddr)(PVMCPU pVCpu, PGSTPTWALK pWalk, int rc, int iLevel)
49	{
50	AssertMsg(rc == VERR_PGM_INVALID_GC_PHYSICAL_ADDRESS, ("%Rrc\n", rc)); NOREF(rc); NOREF(pVCpu);
51	pWalk->Core.fBadPhysAddr = true;
52	pWalk->Core.uLevel = (uint8_t)iLevel;
53	return VERR_PAGE_TABLE_NOT_PRESENT;
54	}
55
56	DECLINLINE(int) PGM_GST_NAME(WalkReturnRsvdError)(PVMCPU pVCpu, PGSTPTWALK pWalk, int iLevel)
57	{
58	NOREF(pVCpu);
59	pWalk->Core.fRsvdError = true;
60	pWalk->Core.uLevel = (uint8_t)iLevel;
61	return VERR_PAGE_TABLE_NOT_PRESENT;
62	}
63
64
65	/**
66	* Performs a guest page table walk.
67	*
68	* @returns VBox status code.
69	* @retval VINF_SUCCESS on success.
70	* @retval VERR_PAGE_TABLE_NOT_PRESENT on failure. Check pWalk for details.
71	*
72	* @param pVCpu The cross context virtual CPU structure of the calling EMT.
73	* @param GCPtr The guest virtual address to walk by.
74	* @param pWalk Where to return the walk result. This is always set.
75	*/
76	DECLINLINE(int) PGM_GST_NAME(Walk)(PVMCPU pVCpu, RTGCPTR GCPtr, PGSTPTWALK pWalk)
77	{
78	int rc;
79
80	/*
81	* Init the walking structure.
82	*/
83	RT_ZERO(*pWalk);
84	pWalk->Core.GCPtr = GCPtr;
85
86	# if PGM_GST_TYPE == PGM_TYPE_32BIT \
87	\|\| PGM_GST_TYPE == PGM_TYPE_PAE
88	/*
89	* Boundary check for PAE and 32-bit (prevents trouble further down).
90	*/
91	if (RT_UNLIKELY(GCPtr >= _4G))
92	return PGM_GST_NAME(WalkReturnNotPresent)(pVCpu, pWalk, 8);
93	# endif
94
95	uint32_t register fEffective = X86_PTE_RW \| X86_PTE_US \| X86_PTE_PWT \| X86_PTE_PCD \| X86_PTE_A \| 1;
96	{
97	# if PGM_GST_TYPE == PGM_TYPE_AMD64
98	/*
99	* The PMLE4.
100	*/
101	rc = pgmGstGetLongModePML4PtrEx(pVCpu, &pWalk->pPml4);
102	if (RT_SUCCESS(rc)) { /* probable */ }
103	else return PGM_GST_NAME(WalkReturnBadPhysAddr)(pVCpu, pWalk, 4, rc);
104
105	PX86PML4E register pPml4e;
106	pWalk->pPml4e = pPml4e = &pWalk->pPml4->a[(GCPtr >> X86_PML4_SHIFT) & X86_PML4_MASK];
107	X86PML4E register Pml4e;
108	pWalk->Pml4e.u = Pml4e.u = pPml4e->u;
109
110	if (Pml4e.n.u1Present) { /* probable */ }
111	else return PGM_GST_NAME(WalkReturnNotPresent)(pVCpu, pWalk, 4);
112
113	if (RT_LIKELY(GST_IS_PML4E_VALID(pVCpu, Pml4e))) { /* likely */ }
114	else return PGM_GST_NAME(WalkReturnRsvdError)(pVCpu, pWalk, 4);
115
116	pWalk->Core.fEffective = fEffective = ((uint32_t)Pml4e.u & (X86_PML4E_RW \| X86_PML4E_US \| X86_PML4E_PWT \| X86_PML4E_PCD \| X86_PML4E_A))
117	\| ((uint32_t)(Pml4e.u >> 63) ^ 1) /NX /;
118
119	/*
120	* The PDPE.
121	*/
122	rc = PGM_GCPHYS_2_PTR_BY_VMCPU(pVCpu, Pml4e.u & X86_PML4E_PG_MASK, &pWalk->pPdpt);
123	if (RT_SUCCESS(rc)) { /* probable */ }
124	else return PGM_GST_NAME(WalkReturnBadPhysAddr)(pVCpu, pWalk, 3, rc);
125
126	# elif PGM_GST_TYPE == PGM_TYPE_PAE
127	rc = pgmGstGetPaePDPTPtrEx(pVCpu, &pWalk->pPdpt);
128	if (RT_SUCCESS(rc)) { /* probable */ }
129	else return PGM_GST_NAME(WalkReturnBadPhysAddr)(pVCpu, pWalk, 8, rc);
130	# endif
131	}
132	{
133	# if PGM_GST_TYPE == PGM_TYPE_AMD64 \|\| PGM_GST_TYPE == PGM_TYPE_PAE
134	PX86PDPE register pPdpe;
135	pWalk->pPdpe = pPdpe = &pWalk->pPdpt->a[(GCPtr >> GST_PDPT_SHIFT) & GST_PDPT_MASK];
136	X86PDPE register Pdpe;
137	pWalk->Pdpe.u = Pdpe.u = pPdpe->u;
138
139	if (Pdpe.n.u1Present) { /* probable */ }
140	else return PGM_GST_NAME(WalkReturnNotPresent)(pVCpu, pWalk, 3);
141
142	if (RT_LIKELY(GST_IS_PDPE_VALID(pVCpu, Pdpe))) { /* likely */ }
143	else return PGM_GST_NAME(WalkReturnRsvdError)(pVCpu, pWalk, 3);
144
145	# if PGM_GST_TYPE == PGM_TYPE_AMD64
146	pWalk->Core.fEffective = fEffective &= ((uint32_t)Pdpe.u & (X86_PDPE_RW \| X86_PDPE_US \| X86_PDPE_PWT \| X86_PDPE_PCD \| X86_PDPE_A))
147	\| ((uint32_t)(Pdpe.u >> 63) ^ 1) /NX /;
148	# else
149	pWalk->Core.fEffective = fEffective = X86_PDPE_RW \| X86_PDPE_US \| X86_PDPE_A
150	\| ((uint32_t)Pdpe.u & (X86_PDPE_PWT \| X86_PDPE_PCD))
151	\| ((uint32_t)(Pdpe.u >> 63) ^ 1) /NX /;
152	# endif
153
154	/*
155	* The PDE.
156	*/
157	rc = PGM_GCPHYS_2_PTR_BY_VMCPU(pVCpu, Pdpe.u & X86_PDPE_PG_MASK, &pWalk->pPd);
158	if (RT_SUCCESS(rc)) { /* probable */ }
159	else return PGM_GST_NAME(WalkReturnBadPhysAddr)(pVCpu, pWalk, 2, rc);
160	# elif PGM_GST_TYPE == PGM_TYPE_32BIT
161	rc = pgmGstGet32bitPDPtrEx(pVCpu, &pWalk->pPd);
162	if (RT_SUCCESS(rc)) { /* probable */ }
163	else return PGM_GST_NAME(WalkReturnBadPhysAddr)(pVCpu, pWalk, 8, rc);
164	# endif
165	}
166	{
167	PGSTPDE register pPde;
168	pWalk->pPde = pPde = &pWalk->pPd->a[(GCPtr >> GST_PD_SHIFT) & GST_PD_MASK];
169	GSTPDE Pde;
170	pWalk->Pde.u = Pde.u = pPde->u;
171	if (Pde.n.u1Present) { /* probable */ }
172	else return PGM_GST_NAME(WalkReturnNotPresent)(pVCpu, pWalk, 2);
173	if (Pde.n.u1Size && GST_IS_PSE_ACTIVE(pVCpu))
174	{
175	if (RT_LIKELY(GST_IS_BIG_PDE_VALID(pVCpu, Pde))) { /* likely */ }
176	else return PGM_GST_NAME(WalkReturnRsvdError)(pVCpu, pWalk, 2);
177
178	/*
179	* We're done.
180	*/
181	# if PGM_GST_TYPE == PGM_TYPE_32BIT
182	fEffective &= Pde.u & (X86_PDE4M_RW \| X86_PDE4M_US \| X86_PDE4M_PWT \| X86_PDE4M_PCD \| X86_PDE4M_A);
183	# else
184	fEffective &= ((uint32_t)Pde.u & (X86_PDE4M_RW \| X86_PDE4M_US \| X86_PDE4M_PWT \| X86_PDE4M_PCD \| X86_PDE4M_A))
185	\| ((uint32_t)(Pde.u >> 63) ^ 1) /NX /;
186	# endif
187	fEffective \|= (uint32_t)Pde.u & (X86_PDE4M_D \| X86_PDE4M_G);
188	fEffective \|= (uint32_t)(Pde.u & X86_PDE4M_PAT) >> X86_PDE4M_PAT_SHIFT;
189	pWalk->Core.fEffective = fEffective;
190
191	pWalk->Core.fEffectiveRW = !!(fEffective & X86_PTE_RW);
192	pWalk->Core.fEffectiveUS = !!(fEffective & X86_PTE_US);
193	# if PGM_GST_TYPE == PGM_TYPE_AMD64 \|\| PGM_GST_TYPE == PGM_TYPE_PAE
194	pWalk->Core.fEffectiveNX = !(fEffective & 1) && GST_IS_NX_ACTIVE(pVCpu);
195	# else
196	pWalk->Core.fEffectiveNX = false;
197	# endif
198	pWalk->Core.fBigPage = true;
199	pWalk->Core.fSucceeded = true;
200
201	pWalk->Core.GCPhys = GST_GET_BIG_PDE_GCPHYS(pVCpu->CTX_SUFF(pVM), Pde)
202	\| (GCPtr & GST_BIG_PAGE_OFFSET_MASK);
203	PGM_A20_APPLY_TO_VAR(pVCpu, pWalk->Core.GCPhys);
204	return VINF_SUCCESS;
205	}
206
207	if (RT_UNLIKELY(!GST_IS_PDE_VALID(pVCpu, Pde)))
208	return PGM_GST_NAME(WalkReturnRsvdError)(pVCpu, pWalk, 2);
209	# if PGM_GST_TYPE == PGM_TYPE_32BIT
210	pWalk->Core.fEffective = fEffective &= Pde.u & (X86_PDE_RW \| X86_PDE_US \| X86_PDE_PWT \| X86_PDE_PCD \| X86_PDE_A);
211	# else
212	pWalk->Core.fEffective = fEffective &= ((uint32_t)Pde.u & (X86_PDE_RW \| X86_PDE_US \| X86_PDE_PWT \| X86_PDE_PCD \| X86_PDE_A))
213	\| ((uint32_t)(Pde.u >> 63) ^ 1) /NX /;
214	# endif
215
216	/*
217	* The PTE.
218	*/
219	rc = PGM_GCPHYS_2_PTR_BY_VMCPU(pVCpu, GST_GET_PDE_GCPHYS(Pde), &pWalk->pPt);
220	if (RT_SUCCESS(rc)) { /* probable */ }
221	else return PGM_GST_NAME(WalkReturnBadPhysAddr)(pVCpu, pWalk, 1, rc);
222	}
223	{
224	PGSTPTE register pPte;
225	pWalk->pPte = pPte = &pWalk->pPt->a[(GCPtr >> GST_PT_SHIFT) & GST_PT_MASK];
226	GSTPTE register Pte;
227	pWalk->Pte.u = Pte.u = pPte->u;
228
229	if (Pte.n.u1Present) { /* probable */ }
230	else return PGM_GST_NAME(WalkReturnNotPresent)(pVCpu, pWalk, 1);
231
232	if (RT_LIKELY(GST_IS_PTE_VALID(pVCpu, Pte))) { /* likely */ }
233	else return PGM_GST_NAME(WalkReturnRsvdError)(pVCpu, pWalk, 1);
234
235	/*
236	* We're done.
237	*/
238	# if PGM_GST_TYPE == PGM_TYPE_32BIT
239	fEffective &= Pte.u & (X86_PTE_RW \| X86_PTE_US \| X86_PTE_PWT \| X86_PTE_PCD \| X86_PTE_A);
240	# else
241	fEffective &= ((uint32_t)Pte.u & (X86_PTE_RW \| X86_PTE_US \| X86_PTE_PWT \| X86_PTE_PCD \| X86_PTE_A))
242	\| ((uint32_t)(Pte.u >> 63) ^ 1) /NX /;
243	# endif
244	fEffective \|= (uint32_t)Pte.u & (X86_PTE_D \| X86_PTE_PAT \| X86_PTE_G);
245	pWalk->Core.fEffective = fEffective;
246
247	pWalk->Core.fEffectiveRW = !!(fEffective & X86_PTE_RW);
248	pWalk->Core.fEffectiveUS = !!(fEffective & X86_PTE_US);
249	# if PGM_GST_TYPE == PGM_TYPE_AMD64 \|\| PGM_GST_TYPE == PGM_TYPE_PAE
250	pWalk->Core.fEffectiveNX = !(fEffective & 1) && GST_IS_NX_ACTIVE(pVCpu);
251	# else
252	pWalk->Core.fEffectiveNX = false;
253	# endif
254	pWalk->Core.fSucceeded = true;
255
256	pWalk->Core.GCPhys = GST_GET_PDE_GCPHYS(Pte)
257	\| (GCPtr & PAGE_OFFSET_MASK);
258	return VINF_SUCCESS;
259	}
260	}
261
262	#endif /* 32BIT, PAE, AMD64 */
263
264	/**
265	* Gets effective Guest OS page information.
266	*
267	* When GCPtr is in a big page, the function will return as if it was a normal
268	* 4KB page. If the need for distinguishing between big and normal page becomes
269	* necessary at a later point, a PGMGstGetPage Ex() will be created for that
270	* purpose.
271	*
272	* @returns VBox status code.
273	* @param pVCpu The cross context virtual CPU structure.
274	* @param GCPtr Guest Context virtual address of the page.
275	* @param pfFlags Where to store the flags. These are X86_PTE_*, even for big pages.
276	* @param pGCPhys Where to store the GC physical address of the page.
277	* This is page aligned!
278	*/
279	PGM_GST_DECL(int, GetPage)(PVMCPU pVCpu, RTGCPTR GCPtr, uint64_t *pfFlags, PRTGCPHYS pGCPhys)
280	{
281	#if PGM_GST_TYPE == PGM_TYPE_REAL \
282	\|\| PGM_GST_TYPE == PGM_TYPE_PROT
283	/*
284	* Fake it.
285	*/
286	if (pfFlags)
287	*pfFlags = X86_PTE_P \| X86_PTE_RW \| X86_PTE_US;
288	if (pGCPhys)
289	*pGCPhys = GCPtr & PAGE_BASE_GC_MASK;
290	NOREF(pVCpu);
291	return VINF_SUCCESS;
292
293	#elif PGM_GST_TYPE == PGM_TYPE_32BIT \
294	\|\| PGM_GST_TYPE == PGM_TYPE_PAE \
295	\|\| PGM_GST_TYPE == PGM_TYPE_AMD64
296
297	GSTPTWALK Walk;
298	int rc = PGM_GST_NAME(Walk)(pVCpu, GCPtr, &Walk);
299	if (RT_FAILURE(rc))
300	return rc;
301
302	if (pGCPhys)
303	*pGCPhys = Walk.Core.GCPhys & ~(RTGCPHYS)PAGE_OFFSET_MASK;
304
305	if (pfFlags)
306	{
307	if (!Walk.Core.fBigPage)
308	pfFlags = (Walk.Pte.u & ~(GST_PTE_PG_MASK \| X86_PTE_RW \| X86_PTE_US)) / NX not needed */
309	\| (Walk.Core.fEffectiveRW ? X86_PTE_RW : 0)
310	\| (Walk.Core.fEffectiveUS ? X86_PTE_US : 0)
311	# if PGM_WITH_NX(PGM_GST_TYPE, PGM_GST_TYPE)
312	\| (Walk.Core.fEffectiveNX ? X86_PTE_PAE_NX : 0)
313	# endif
314	;
315	else
316	{
317	pfFlags = (Walk.Pde.u & ~(GST_PTE_PG_MASK \| X86_PDE4M_RW \| X86_PDE4M_US \| X86_PDE4M_PS)) / NX not needed */
318	\| ((Walk.Pde.u & X86_PDE4M_PAT) >> X86_PDE4M_PAT_SHIFT)
319	\| (Walk.Core.fEffectiveRW ? X86_PTE_RW : 0)
320	\| (Walk.Core.fEffectiveUS ? X86_PTE_US : 0)
321	# if PGM_WITH_NX(PGM_GST_TYPE, PGM_GST_TYPE)
322	\| (Walk.Core.fEffectiveNX ? X86_PTE_PAE_NX : 0)
323	# endif
324	;
325	}
326	}
327
328	return VINF_SUCCESS;
329
330	#else
331	# error "shouldn't be here!"
332	/* something else... */
333	return VERR_NOT_SUPPORTED;
334	#endif
335	}
336
337
338	/**
339	* Modify page flags for a range of pages in the guest's tables
340	*
341	* The existing flags are ANDed with the fMask and ORed with the fFlags.
342	*
343	* @returns VBox status code.
344	* @param pVCpu The cross context virtual CPU structure.
345	* @param GCPtr Virtual address of the first page in the range. Page aligned!
346	* @param cb Size (in bytes) of the page range to apply the modification to. Page aligned!
347	* @param fFlags The OR mask - page flags X86_PTE_*, excluding the page mask of course.
348	* @param fMask The AND mask - page flags X86_PTE_*.
349	*/
350	PGM_GST_DECL(int, ModifyPage)(PVMCPU pVCpu, RTGCPTR GCPtr, size_t cb, uint64_t fFlags, uint64_t fMask)
351	{
352	Assert((cb & PAGE_OFFSET_MASK) == 0); RT_NOREF_PV(cb);
353
354	#if PGM_GST_TYPE == PGM_TYPE_32BIT \
355	\|\| PGM_GST_TYPE == PGM_TYPE_PAE \
356	\|\| PGM_GST_TYPE == PGM_TYPE_AMD64
357	for (;;)
358	{
359	GSTPTWALK Walk;
360	int rc = PGM_GST_NAME(Walk)(pVCpu, GCPtr, &Walk);
361	if (RT_FAILURE(rc))
362	return rc;
363
364	if (!Walk.Core.fBigPage)
365	{
366	/*
367	* 4KB Page table, process
368	*
369	* Walk pages till we're done.
370	*/
371	unsigned iPTE = (GCPtr >> GST_PT_SHIFT) & GST_PT_MASK;
372	while (iPTE < RT_ELEMENTS(Walk.pPt->a))
373	{
374	GSTPTE Pte = Walk.pPt->a[iPTE];
375	Pte.u = (Pte.u & (fMask \| X86_PTE_PAE_PG_MASK))
376	\| (fFlags & ~GST_PTE_PG_MASK);
377	Walk.pPt->a[iPTE] = Pte;
378
379	/* next page */
380	cb -= PAGE_SIZE;
381	if (!cb)
382	return VINF_SUCCESS;
383	GCPtr += PAGE_SIZE;
384	iPTE++;
385	}
386	}
387	else
388	{
389	/*
390	* 2/4MB Page table
391	*/
392	GSTPDE PdeNew;
393	# if PGM_GST_TYPE == PGM_TYPE_32BIT
394	PdeNew.u = (Walk.Pde.u & (fMask \| ((fMask & X86_PTE_PAT) << X86_PDE4M_PAT_SHIFT) \| GST_PDE_BIG_PG_MASK \| X86_PDE4M_PG_HIGH_MASK \| X86_PDE4M_PS))
395	# else
396	PdeNew.u = (Walk.Pde.u & (fMask \| ((fMask & X86_PTE_PAT) << X86_PDE4M_PAT_SHIFT) \| GST_PDE_BIG_PG_MASK \| X86_PDE4M_PS))
397	# endif
398	\| (fFlags & ~GST_PTE_PG_MASK)
399	\| ((fFlags & X86_PTE_PAT) << X86_PDE4M_PAT_SHIFT);
400	*Walk.pPde = PdeNew;
401
402	/* advance */
403	const unsigned cbDone = GST_BIG_PAGE_SIZE - (GCPtr & GST_BIG_PAGE_OFFSET_MASK);
404	if (cbDone >= cb)
405	return VINF_SUCCESS;
406	cb -= cbDone;
407	GCPtr += cbDone;
408	}
409	}
410
411	#else
412	/* real / protected mode: ignore. */
413	NOREF(pVCpu); NOREF(GCPtr); NOREF(fFlags); NOREF(fMask);
414	return VINF_SUCCESS;
415	#endif
416	}
417
418
419	/**
420	* Retrieve guest PDE information.
421	*
422	* @returns VBox status code.
423	* @param pVCpu The cross context virtual CPU structure.
424	* @param GCPtr Guest context pointer.
425	* @param pPDE Pointer to guest PDE structure.
426	*/
427	PGM_GST_DECL(int, GetPDE)(PVMCPU pVCpu, RTGCPTR GCPtr, PX86PDEPAE pPDE)
428	{
429	#if PGM_GST_TYPE == PGM_TYPE_32BIT \
430	\|\| PGM_GST_TYPE == PGM_TYPE_PAE \
431	\|\| PGM_GST_TYPE == PGM_TYPE_AMD64
432
433	# if PGM_GST_TYPE != PGM_TYPE_AMD64
434	/* Boundary check. */
435	if (RT_UNLIKELY(GCPtr >= _4G))
436	return VERR_PAGE_TABLE_NOT_PRESENT;
437	# endif
438
439	# if PGM_GST_TYPE == PGM_TYPE_32BIT
440	unsigned iPd = (GCPtr >> GST_PD_SHIFT) & GST_PD_MASK;
441	PX86PD pPd = pgmGstGet32bitPDPtr(pVCpu);
442
443	# elif PGM_GST_TYPE == PGM_TYPE_PAE
444	unsigned iPd = 0; /* shut up gcc */
445	PCX86PDPAE pPd = pgmGstGetPaePDPtr(pVCpu, GCPtr, &iPd, NULL);
446
447	# elif PGM_GST_TYPE == PGM_TYPE_AMD64
448	PX86PML4E pPml4eIgn;
449	X86PDPE PdpeIgn;
450	unsigned iPd = 0; /* shut up gcc */
451	PCX86PDPAE pPd = pgmGstGetLongModePDPtr(pVCpu, GCPtr, &pPml4eIgn, &PdpeIgn, &iPd);
452	/* Note! We do not return an effective PDE here like we do for the PTE in GetPage method. */
453	# endif
454
455	if (RT_LIKELY(pPd))
456	pPDE->u = (X86PGPAEUINT)pPd->a[iPd].u;
457	else
458	pPDE->u = 0;
459	return VINF_SUCCESS;
460
461	#else
462	NOREF(pVCpu); NOREF(GCPtr); NOREF(pPDE);
463	AssertFailed();
464	return VERR_NOT_IMPLEMENTED;
465	#endif
466	}
467
468
469	#if ( PGM_GST_TYPE == PGM_TYPE_32BIT \
470	\|\| PGM_GST_TYPE == PGM_TYPE_PAE \
471	\|\| PGM_GST_TYPE == PGM_TYPE_AMD64) \
472	&& defined(VBOX_WITH_RAW_MODE)
473	/**
474	* Updates one virtual handler range.
475	*
476	* @returns 0
477	* @param pNode Pointer to a PGMVIRTHANDLER.
478	* @param pvUser Pointer to a PGMVHUARGS structure (see PGM.cpp).
479	*/
480	static DECLCALLBACK(int) PGM_GST_NAME(VirtHandlerUpdateOne)(PAVLROGCPTRNODECORE pNode, void *pvUser)
481	{
482	PPGMHVUSTATE pState = (PPGMHVUSTATE)pvUser;
483	PVM pVM = pState->pVM;
484	PVMCPU pVCpu = pState->pVCpu;
485	PPGMVIRTHANDLER pCur = (PPGMVIRTHANDLER)pNode;
486	PPGMVIRTHANDLERTYPEINT pCurType = PGMVIRTANDLER_GET_TYPE(pVM, pCur);
487
488	Assert(pCurType->enmKind != PGMVIRTHANDLERKIND_HYPERVISOR); NOREF(pCurType);
489
490	# if PGM_GST_TYPE == PGM_TYPE_32BIT
491	PX86PD pPDSrc = pgmGstGet32bitPDPtr(pVCpu);
492	# endif
493
494	RTGCPTR GCPtr = pCur->Core.Key;
495	# if PGM_GST_TYPE != PGM_TYPE_AMD64
496	/* skip all stuff above 4GB if not AMD64 mode. */
497	if (RT_UNLIKELY(GCPtr >= _4G))
498	return 0;
499	# endif
500
501	unsigned offPage = GCPtr & PAGE_OFFSET_MASK;
502	unsigned iPage = 0;
503	while (iPage < pCur->cPages)
504	{
505	# if PGM_GST_TYPE == PGM_TYPE_32BIT
506	X86PDE Pde = pPDSrc->a[GCPtr >> X86_PD_SHIFT];
507	# elif PGM_GST_TYPE == PGM_TYPE_PAE
508	X86PDEPAE Pde = pgmGstGetPaePDE(pVCpu, GCPtr);
509	# elif PGM_GST_TYPE == PGM_TYPE_AMD64
510	X86PDEPAE Pde = pgmGstGetLongModePDE(pVCpu, GCPtr);
511	# endif
512	# if PGM_GST_TYPE == PGM_TYPE_32BIT
513	bool const fBigPage = Pde.b.u1Size && (pState->cr4 & X86_CR4_PSE);
514	# else
515	bool const fBigPage = Pde.b.u1Size;
516	# endif
517	if ( Pde.n.u1Present
518	&& ( !fBigPage
519	? GST_IS_PDE_VALID(pVCpu, Pde)
520	: GST_IS_BIG_PDE_VALID(pVCpu, Pde)) )
521	{
522	if (!fBigPage)
523	{
524	/*
525	* Normal page table.
526	*/
527	PGSTPT pPT;
528	int rc = PGM_GCPHYS_2_PTR_V2(pVM, pVCpu, GST_GET_PDE_GCPHYS(Pde), &pPT);
529	if (RT_SUCCESS(rc))
530	{
531	for (unsigned iPTE = (GCPtr >> GST_PT_SHIFT) & GST_PT_MASK;
532	iPTE < RT_ELEMENTS(pPT->a) && iPage < pCur->cPages;
533	iPTE++, iPage++, GCPtr += PAGE_SIZE, offPage = 0)
534	{
535	GSTPTE Pte = pPT->a[iPTE];
536	RTGCPHYS GCPhysNew;
537	if (Pte.n.u1Present)
538	GCPhysNew = PGM_A20_APPLY(pVCpu, (RTGCPHYS)(pPT->a[iPTE].u & GST_PTE_PG_MASK) + offPage);
539	else
540	GCPhysNew = NIL_RTGCPHYS;
541	if (pCur->aPhysToVirt[iPage].Core.Key != GCPhysNew)
542	{
543	if (pCur->aPhysToVirt[iPage].Core.Key != NIL_RTGCPHYS)
544	pgmHandlerVirtualClearPage(pVM, pCur, iPage);
545	#ifdef VBOX_STRICT_PGM_HANDLER_VIRTUAL
546	AssertReleaseMsg(!pCur->aPhysToVirt[iPage].offNextAlias,
547	("{.Core.Key=%RGp, .Core.KeyLast=%RGp, .offVirtHandler=%#RX32, .offNextAlias=%#RX32} GCPhysNew=%RGp\n",
548	pCur->aPhysToVirt[iPage].Core.Key, pCur->aPhysToVirt[iPage].Core.KeyLast,
549	pCur->aPhysToVirt[iPage].offVirtHandler, pCur->aPhysToVirt[iPage].offNextAlias, GCPhysNew));
550	#endif
551	pCur->aPhysToVirt[iPage].Core.Key = GCPhysNew;
552	pState->fTodo \|= PGM_SYNC_UPDATE_PAGE_BIT_VIRTUAL;
553	}
554	}
555	}
556	else
557	{
558	/* not-present. */
559	offPage = 0;
560	AssertRC(rc);
561	for (unsigned iPTE = (GCPtr >> GST_PT_SHIFT) & GST_PT_MASK;
562	iPTE < RT_ELEMENTS(pPT->a) && iPage < pCur->cPages;
563	iPTE++, iPage++, GCPtr += PAGE_SIZE)
564	{
565	if (pCur->aPhysToVirt[iPage].Core.Key != NIL_RTGCPHYS)
566	{
567	pgmHandlerVirtualClearPage(pVM, pCur, iPage);
568	#ifdef VBOX_STRICT_PGM_HANDLER_VIRTUAL
569	AssertReleaseMsg(!pCur->aPhysToVirt[iPage].offNextAlias,
570	("{.Core.Key=%RGp, .Core.KeyLast=%RGp, .offVirtHandler=%#RX32, .offNextAlias=%#RX32}\n",
571	pCur->aPhysToVirt[iPage].Core.Key, pCur->aPhysToVirt[iPage].Core.KeyLast,
572	pCur->aPhysToVirt[iPage].offVirtHandler, pCur->aPhysToVirt[iPage].offNextAlias));
573	#endif
574	pCur->aPhysToVirt[iPage].Core.Key = NIL_RTGCPHYS;
575	pState->fTodo \|= PGM_SYNC_UPDATE_PAGE_BIT_VIRTUAL;
576	}
577	}
578	}
579	}
580	else
581	{
582	/*
583	* 2/4MB page.
584	*/
585	RTGCPHYS GCPhys = (RTGCPHYS)GST_GET_PDE_GCPHYS(Pde);
586	for (unsigned i4KB = (GCPtr >> GST_PT_SHIFT) & GST_PT_MASK;
587	i4KB < PAGE_SIZE / sizeof(GSTPDE) && iPage < pCur->cPages;
588	i4KB++, iPage++, GCPtr += PAGE_SIZE, offPage = 0)
589	{
590	RTGCPHYS GCPhysNew = PGM_A20_APPLY(pVCpu, GCPhys + (i4KB << PAGE_SHIFT) + offPage);
591	if (pCur->aPhysToVirt[iPage].Core.Key != GCPhysNew)
592	{
593	if (pCur->aPhysToVirt[iPage].Core.Key != NIL_RTGCPHYS)
594	pgmHandlerVirtualClearPage(pVM, pCur, iPage);
595	#ifdef VBOX_STRICT_PGM_HANDLER_VIRTUAL
596	AssertReleaseMsg(!pCur->aPhysToVirt[iPage].offNextAlias,
597	("{.Core.Key=%RGp, .Core.KeyLast=%RGp, .offVirtHandler=%#RX32, .offNextAlias=%#RX32} GCPhysNew=%RGp\n",
598	pCur->aPhysToVirt[iPage].Core.Key, pCur->aPhysToVirt[iPage].Core.KeyLast,
599	pCur->aPhysToVirt[iPage].offVirtHandler, pCur->aPhysToVirt[iPage].offNextAlias, GCPhysNew));
600	#endif
601	pCur->aPhysToVirt[iPage].Core.Key = GCPhysNew;
602	pState->fTodo \|= PGM_SYNC_UPDATE_PAGE_BIT_VIRTUAL;
603	}
604	}
605	} /* pde type */
606	}
607	else
608	{
609	/* not-present / invalid. */
610	Log(("VirtHandler: Not present / invalid Pde=%RX64\n", (uint64_t)Pde.u));
611	for (unsigned cPages = (GST_PT_MASK + 1) - ((GCPtr >> GST_PT_SHIFT) & GST_PT_MASK);
612	cPages && iPage < pCur->cPages;
613	iPage++, GCPtr += PAGE_SIZE)
614	{
615	if (pCur->aPhysToVirt[iPage].Core.Key != NIL_RTGCPHYS)
616	{
617	pgmHandlerVirtualClearPage(pVM, pCur, iPage);
618	pCur->aPhysToVirt[iPage].Core.Key = NIL_RTGCPHYS;
619	pState->fTodo \|= PGM_SYNC_UPDATE_PAGE_BIT_VIRTUAL;
620	}
621	}
622	offPage = 0;
623	}
624	} /* for pages in virtual mapping. */
625
626	return 0;
627	}
628	#endif /* 32BIT, PAE and AMD64 + VBOX_WITH_RAW_MODE */
629
630
631	/**
632	* Updates the virtual page access handlers.
633	*
634	* @returns true if bits were flushed.
635	* @returns false if bits weren't flushed.
636	* @param pVM The cross context VM structure.
637	* @param cr4 The cr4 register value.
638	*/
639	PGM_GST_DECL(bool, HandlerVirtualUpdate)(PVM pVM, uint32_t cr4)
640	{
641	#if ( PGM_GST_TYPE == PGM_TYPE_32BIT \
642	\|\| PGM_GST_TYPE == PGM_TYPE_PAE \
643	\|\| PGM_GST_TYPE == PGM_TYPE_AMD64) \
644	&& defined(VBOX_WITH_RAW_MODE)
645
646	/** @todo
647	* In theory this is not sufficient: the guest can change a single page in a range with invlpg
648	*/
649
650	/*
651	* Resolve any virtual address based access handlers to GC physical addresses.
652	* This should be fairly quick.
653	*/
654	RTUINT fTodo = 0;
655
656	pgmLock(pVM);
657	STAM_PROFILE_START(&pVM->pgm.s.CTX_SUFF(pStats)->CTX_MID_Z(Stat,SyncCR3HandlerVirtualUpdate), a);
658
659	for (VMCPUID i = 0; i < pVM->cCpus; i++)
660	{
661	PGMHVUSTATE State;
662	PVMCPU pVCpu = &pVM->aCpus[i];
663
664	State.pVM = pVM;
665	State.pVCpu = pVCpu;
666	State.fTodo = pVCpu->pgm.s.fSyncFlags;
667	State.cr4 = cr4;
668	RTAvlroGCPtrDoWithAll(&pVM->pgm.s.CTX_SUFF(pTrees)->VirtHandlers, true, PGM_GST_NAME(VirtHandlerUpdateOne), &State);
669
670	fTodo \|= State.fTodo;
671	}
672	STAM_PROFILE_STOP(&pVM->pgm.s.CTX_SUFF(pStats)->CTX_MID_Z(Stat,SyncCR3HandlerVirtualUpdate), a);
673
674
675	/*
676	* Set / reset bits?
677	*/
678	if (fTodo & PGM_SYNC_UPDATE_PAGE_BIT_VIRTUAL)
679	{
680	STAM_PROFILE_START(&pVM->pgm.s.CTX_SUFF(pStats)->CTX_MID_Z(Stat,SyncCR3HandlerVirtualReset), b);
681	Log(("HandlerVirtualUpdate: resets bits\n"));
682	RTAvlroGCPtrDoWithAll(&pVM->pgm.s.CTX_SUFF(pTrees)->VirtHandlers, true, pgmHandlerVirtualResetOne, pVM);
683
684	for (VMCPUID i = 0; i < pVM->cCpus; i++)
685	{
686	PVMCPU pVCpu = &pVM->aCpus[i];
687	pVCpu->pgm.s.fSyncFlags &= ~PGM_SYNC_UPDATE_PAGE_BIT_VIRTUAL;
688	}
689
690	STAM_PROFILE_STOP(&pVM->pgm.s.CTX_SUFF(pStats)->CTX_MID_Z(Stat,SyncCR3HandlerVirtualReset), b);
691	}
692	pgmUnlock(pVM);
693
694	return !!(fTodo & PGM_SYNC_UPDATE_PAGE_BIT_VIRTUAL);
695
696	#else /* real / protected */
697	NOREF(pVM); NOREF(cr4);
698	return false;
699	#endif
700	}
701

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source: vbox/trunk/src/VBox/VMM/VMMAll/PGMAllGst.h@ 65757

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