PGMShw.h@ 26295

Last change on this file since 26295 was 24077, checked in by vboxsync, 15 years ago
Fixed nested paging for 64 bits guests on 32 bits hosts (AMD-V only).
Property svn:eol-style set to `native` Property svn:keywords set to `Id`
File size: 10.0 KB

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1	/* $Id: PGMShw.h 24077 2009-10-26 14:08:59Z vboxsync $ */
2	/** @file
3	* VBox - Page Manager / Monitor, Shadow 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 SHWPT
26	#undef PSHWPT
27	#undef SHWPTE
28	#undef PSHWPTE
29	#undef SHWPD
30	#undef PSHWPD
31	#undef SHWPDE
32	#undef PSHWPDE
33	#undef SHW_PDE_PG_MASK
34	#undef SHW_PD_SHIFT
35	#undef SHW_PD_MASK
36	#undef SHW_PTE_PG_MASK
37	#undef SHW_PT_SHIFT
38	#undef SHW_PT_MASK
39	#undef SHW_TOTAL_PD_ENTRIES
40	#undef SHW_PDPT_SHIFT
41	#undef SHW_PDPT_MASK
42	#undef SHW_PDPE_PG_MASK
43	#undef SHW_POOL_ROOT_IDX
44
45	#if PGM_SHW_TYPE == PGM_TYPE_32BIT
46	# define SHWPT X86PT
47	# define PSHWPT PX86PT
48	# define SHWPTE X86PTE
49	# define PSHWPTE PX86PTE
50	# define SHWPD X86PD
51	# define PSHWPD PX86PD
52	# define SHWPDE X86PDE
53	# define PSHWPDE PX86PDE
54	# define SHW_PDE_PG_MASK X86_PDE_PG_MASK
55	# define SHW_PD_SHIFT X86_PD_SHIFT
56	# define SHW_PD_MASK X86_PD_MASK
57	# define SHW_TOTAL_PD_ENTRIES X86_PG_ENTRIES
58	# define SHW_PTE_PG_MASK X86_PTE_PG_MASK
59	# define SHW_PT_SHIFT X86_PT_SHIFT
60	# define SHW_PT_MASK X86_PT_MASK
61	# define SHW_POOL_ROOT_IDX PGMPOOL_IDX_PD
62
63	#elif PGM_SHW_TYPE == PGM_TYPE_EPT
64	# define SHWPT EPTPT
65	# define PSHWPT PEPTPT
66	# define SHWPTE EPTPTE
67	# define PSHWPTE PEPTPTE
68	# define SHWPD EPTPD
69	# define PSHWPD PEPTPD
70	# define SHWPDE EPTPDE
71	# define PSHWPDE PEPTPDE
72	# define SHW_PDE_PG_MASK EPT_PDE_PG_MASK
73	# define SHW_PD_SHIFT EPT_PD_SHIFT
74	# define SHW_PD_MASK EPT_PD_MASK
75	# define SHW_PTE_PG_MASK EPT_PTE_PG_MASK
76	# define SHW_PT_SHIFT EPT_PT_SHIFT
77	# define SHW_PT_MASK EPT_PT_MASK
78	# define SHW_PDPT_SHIFT EPT_PDPT_SHIFT
79	# define SHW_PDPT_MASK EPT_PDPT_MASK
80	# define SHW_PDPE_PG_MASK EPT_PDPE_PG_MASK
81	# define SHW_TOTAL_PD_ENTRIES (EPT_PG_AMD64_ENTRIES*EPT_PG_AMD64_PDPE_ENTRIES)
82	# define SHW_POOL_ROOT_IDX PGMPOOL_IDX_NESTED_ROOT /* do not use! exception is real mode & protected mode without paging. */
83
84	#else
85	# define SHWPT X86PTPAE
86	# define PSHWPT PX86PTPAE
87	# define SHWPTE X86PTEPAE
88	# define PSHWPTE PX86PTEPAE
89	# define SHWPD X86PDPAE
90	# define PSHWPD PX86PDPAE
91	# define SHWPDE X86PDEPAE
92	# define PSHWPDE PX86PDEPAE
93	# define SHW_PDE_PG_MASK X86_PDE_PAE_PG_MASK
94	# define SHW_PD_SHIFT X86_PD_PAE_SHIFT
95	# define SHW_PD_MASK X86_PD_PAE_MASK
96	# define SHW_PTE_PG_MASK X86_PTE_PAE_PG_MASK
97	# define SHW_PT_SHIFT X86_PT_PAE_SHIFT
98	# define SHW_PT_MASK X86_PT_PAE_MASK
99
100	# if PGM_SHW_TYPE == PGM_TYPE_AMD64
101	# define SHW_PDPT_SHIFT X86_PDPT_SHIFT
102	# define SHW_PDPT_MASK X86_PDPT_MASK_AMD64
103	# define SHW_PDPE_PG_MASK X86_PDPE_PG_MASK
104	# define SHW_TOTAL_PD_ENTRIES (X86_PG_AMD64_ENTRIES*X86_PG_AMD64_PDPE_ENTRIES)
105	# define SHW_POOL_ROOT_IDX PGMPOOL_IDX_AMD64_CR3
106
107	# else /* 32 bits PAE mode */
108	# define SHW_PDPT_SHIFT X86_PDPT_SHIFT
109	# define SHW_PDPT_MASK X86_PDPT_MASK_PAE
110	# define SHW_PDPE_PG_MASK X86_PDPE_PG_MASK
111	# define SHW_TOTAL_PD_ENTRIES (X86_PG_PAE_ENTRIES*X86_PG_PAE_PDPE_ENTRIES)
112	# define SHW_POOL_ROOT_IDX PGMPOOL_IDX_PDPT
113	# endif
114	#endif
115
116
117	/*******************************************************************************
118	* Internal Functions *
119	*******************************************************************************/
120	RT_C_DECLS_BEGIN
121	/* r3 */
122	PGM_SHW_DECL(int, InitData)(PVM pVM, PPGMMODEDATA pModeData, bool fResolveGCAndR0);
123	PGM_SHW_DECL(int, Enter)(PVMCPU pVCpu, bool fIs64BitsPagingMode);
124	PGM_SHW_DECL(int, Relocate)(PVMCPU pVCpu, RTGCPTR offDelta);
125	PGM_SHW_DECL(int, Exit)(PVMCPU pVCpu);
126
127	/* all */
128	PGM_SHW_DECL(int, GetPage)(PVMCPU pVCpu, RTGCPTR GCPtr, uint64_t *pfFlags, PRTHCPHYS pHCPhys);
129	PGM_SHW_DECL(int, ModifyPage)(PVMCPU pVCpu, RTGCPTR GCPtr, size_t cb, uint64_t fFlags, uint64_t fMask);
130	RT_C_DECLS_END
131
132
133	/**
134	* Initializes the guest bit of the paging mode data.
135	*
136	* @returns VBox status code.
137	* @param pVM The VM handle.
138	* @param fResolveGCAndR0 Indicate whether or not GC and Ring-0 symbols can be resolved now.
139	* This is used early in the init process to avoid trouble with PDM
140	* not being initialized yet.
141	*/
142	PGM_SHW_DECL(int, InitData)(PVM pVM, PPGMMODEDATA pModeData, bool fResolveGCAndR0)
143	{
144	Assert(pModeData->uShwType == PGM_SHW_TYPE \|\| pModeData->uShwType == PGM_TYPE_NESTED);
145
146	/* Ring-3 */
147	pModeData->pfnR3ShwRelocate = PGM_SHW_NAME(Relocate);
148	pModeData->pfnR3ShwExit = PGM_SHW_NAME(Exit);
149	pModeData->pfnR3ShwGetPage = PGM_SHW_NAME(GetPage);
150	pModeData->pfnR3ShwModifyPage = PGM_SHW_NAME(ModifyPage);
151
152	if (fResolveGCAndR0)
153	{
154	int rc;
155
156	#if PGM_SHW_TYPE != PGM_TYPE_AMD64 && PGM_SHW_TYPE != PGM_TYPE_NESTED && PGM_SHW_TYPE != PGM_TYPE_EPT /* No AMD64 for traditional virtualization, only VT-x and AMD-V. */
157	/* GC */
158	rc = PDMR3LdrGetSymbolRC(pVM, NULL, PGM_SHW_NAME_RC_STR(GetPage), &pModeData->pfnRCShwGetPage);
159	AssertMsgRCReturn(rc, ("%s -> rc=%Rrc\n", PGM_SHW_NAME_RC_STR(GetPage), rc), rc);
160	rc = PDMR3LdrGetSymbolRC(pVM, NULL, PGM_SHW_NAME_RC_STR(ModifyPage), &pModeData->pfnRCShwModifyPage);
161	AssertMsgRCReturn(rc, ("%s -> rc=%Rrc\n", PGM_SHW_NAME_RC_STR(ModifyPage), rc), rc);
162	#endif /* Not AMD64 shadow paging. */
163
164	/* Ring-0 */
165	rc = PDMR3LdrGetSymbolR0(pVM, NULL, PGM_SHW_NAME_R0_STR(GetPage), &pModeData->pfnR0ShwGetPage);
166	AssertMsgRCReturn(rc, ("%s -> rc=%Rrc\n", PGM_SHW_NAME_R0_STR(GetPage), rc), rc);
167	rc = PDMR3LdrGetSymbolR0(pVM, NULL, PGM_SHW_NAME_R0_STR(ModifyPage), &pModeData->pfnR0ShwModifyPage);
168	AssertMsgRCReturn(rc, ("%s -> rc=%Rrc\n", PGM_SHW_NAME_R0_STR(ModifyPage), rc), rc);
169	}
170	return VINF_SUCCESS;
171	}
172
173	/**
174	* Enters the shadow mode.
175	*
176	* @returns VBox status code.
177	* @param pVCpu The VMCPU to operate on.
178	* @param fIs64BitsPagingMode New shadow paging mode is for 64 bits? (only relevant for 64 bits guests on a 32 bits AMD-V nested paging host)
179	*/
180	PGM_SHW_DECL(int, Enter)(PVMCPU pVCpu, bool fIs64BitsPagingMode)
181	{
182	#if PGM_SHW_TYPE == PGM_TYPE_NESTED \|\| PGM_SHW_TYPE == PGM_TYPE_EPT
183
184	# if PGM_SHW_TYPE == PGM_TYPE_NESTED && HC_ARCH_BITS == 32
185	/* Must distinguish between 32 and 64 bits guest paging modes as we'll use a different shadow paging root/mode in both cases. */
186	RTGCPHYS GCPhysCR3 = (fIs64BitsPagingMode) ? RT_BIT_64(63) : RT_BIT_64(62);
187	# else
188	RTGCPHYS GCPhysCR3 = RT_BIT_64(63);
189	# endif
190	PPGMPOOLPAGE pNewShwPageCR3;
191	PVM pVM = pVCpu->pVMR3;
192	PPGMPOOL pPool = pVM->pgm.s.CTX_SUFF(pPool);
193
194	Assert(HWACCMIsNestedPagingActive(pVM));
195	Assert(!pVCpu->pgm.s.pShwPageCR3R3);
196
197	pgmLock(pVM);
198
199	int rc = pgmPoolAlloc(pVM, GCPhysCR3, PGMPOOLKIND_ROOT_NESTED, PGMPOOL_IDX_NESTED_ROOT, GCPhysCR3 >> PAGE_SHIFT, &pNewShwPageCR3, true /* lock page */);
200	AssertFatalRC(rc);
201
202	pVCpu->pgm.s.iShwUser = PGMPOOL_IDX_NESTED_ROOT;
203	pVCpu->pgm.s.iShwUserTable = GCPhysCR3 >> PAGE_SHIFT;
204	pVCpu->pgm.s.pShwPageCR3R3 = pNewShwPageCR3;
205
206	pVCpu->pgm.s.pShwPageCR3RC = MMHyperCCToRC(pVM, pVCpu->pgm.s.pShwPageCR3R3);
207	pVCpu->pgm.s.pShwPageCR3R0 = MMHyperCCToR0(pVM, pVCpu->pgm.s.pShwPageCR3R3);
208
209	pgmUnlock(pVM);
210
211	Log(("Enter nested shadow paging mode: root %RHv phys %RHp\n", pVCpu->pgm.s.pShwPageCR3R3, pVCpu->pgm.s.CTX_SUFF(pShwPageCR3)->Core.Key));
212	#endif
213	return VINF_SUCCESS;
214	}
215
216
217	/**
218	* Relocate any GC pointers related to shadow mode paging.
219	*
220	* @returns VBox status code.
221	* @param pVCpu The VMCPU to operate on.
222	* @param offDelta The reloation offset.
223	*/
224	PGM_SHW_DECL(int, Relocate)(PVMCPU pVCpu, RTGCPTR offDelta)
225	{
226	pVCpu->pgm.s.pShwPageCR3RC += offDelta;
227	return VINF_SUCCESS;
228	}
229
230
231	/**
232	* Exits the shadow mode.
233	*
234	* @returns VBox status code.
235	* @param pVCpu The VMCPU to operate on.
236	*/
237	PGM_SHW_DECL(int, Exit)(PVMCPU pVCpu)
238	{
239	PVM pVM = pVCpu->pVMR3;
240
241	if ( ( pVCpu->pgm.s.enmShadowMode == PGMMODE_NESTED
242	\|\| pVCpu->pgm.s.enmShadowMode == PGMMODE_EPT)
243	&& pVCpu->pgm.s.CTX_SUFF(pShwPageCR3))
244	{
245	PPGMPOOL pPool = pVM->pgm.s.CTX_SUFF(pPool);
246
247	Assert(pVCpu->pgm.s.iShwUser == PGMPOOL_IDX_NESTED_ROOT);
248
249	pgmLock(pVM);
250
251	/* Mark the page as unlocked; allow flushing again. */
252	pgmPoolUnlockPage(pPool, pVCpu->pgm.s.CTX_SUFF(pShwPageCR3));
253
254	pgmPoolFreeByPage(pPool, pVCpu->pgm.s.CTX_SUFF(pShwPageCR3), pVCpu->pgm.s.iShwUser, pVCpu->pgm.s.iShwUserTable);
255	pVCpu->pgm.s.pShwPageCR3R3 = 0;
256	pVCpu->pgm.s.pShwPageCR3R0 = 0;
257	pVCpu->pgm.s.pShwPageCR3RC = 0;
258	pVCpu->pgm.s.iShwUser = 0;
259	pVCpu->pgm.s.iShwUserTable = 0;
260
261	pgmUnlock(pVM);
262
263	Log(("Leave nested shadow paging mode\n"));
264	}
265	return VINF_SUCCESS;
266	}
267
268
269

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source: vbox/trunk/src/VBox/VMM/PGMShw.h@ 26295

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