PGMAllShw.h@ 105844

Last change on this file since 105844 was 103720, checked in by vboxsync, 9 months ago
VMM/PGM: Nested VMX: bugref:10607 Fixed getting shadow page when the guest paging mode (SLAT) is EPT.
Property svn:eol-style set to `native` Property svn:keywords set to `Id Revision`
File size: 31.5 KB

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1	/* $Id: PGMAllShw.h 103720 2024-03-07 09:36:08Z vboxsync $ */
2	/** @file
3	* VBox - Page Manager, Shadow Paging Template - All context code.
4	*/
5
6	/*
7	* Copyright (C) 2006-2023 Oracle and/or its affiliates.
8	*
9	* This file is part of VirtualBox base platform packages, as
10	* available from https://www.virtualbox.org.
11	*
12	* This program is free software; you can redistribute it and/or
13	* modify it under the terms of the GNU General Public License
14	* as published by the Free Software Foundation, in version 3 of the
15	* License.
16	*
17	* This program is distributed in the hope that it will be useful, but
18	* WITHOUT ANY WARRANTY; without even the implied warranty of
19	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20	* General Public License for more details.
21	*
22	* You should have received a copy of the GNU General Public License
23	* along with this program; if not, see <https://www.gnu.org/licenses>.
24	*
25	* SPDX-License-Identifier: GPL-3.0-only
26	*/
27
28
29	/*********************************************************************************************************************************
30	* Defined Constants And Macros *
31	*********************************************************************************************************************************/
32	#undef SHWUINT
33	#undef SHWPT
34	#undef PSHWPT
35	#undef SHWPTE
36	#undef PSHWPTE
37	#undef SHWPD
38	#undef PSHWPD
39	#undef SHWPDE
40	#undef PSHWPDE
41	#undef SHW_PDE_PG_MASK
42	#undef SHW_PD_SHIFT
43	#undef SHW_PD_MASK
44	#undef SHW_PDE_ATOMIC_SET
45	#undef SHW_PDE_ATOMIC_SET2
46	#undef SHW_PDE_IS_P
47	#undef SHW_PDE_IS_A
48	#undef SHW_PDE_IS_BIG
49	#undef SHW_PTE_PG_MASK
50	#undef SHW_PTE_IS_P
51	#undef SHW_PTE_IS_RW
52	#undef SHW_PTE_IS_US
53	#undef SHW_PTE_IS_A
54	#undef SHW_PTE_IS_D
55	#undef SHW_PTE_IS_P_RW
56	#undef SHW_PTE_IS_TRACK_DIRTY
57	#undef SHW_PTE_GET_HCPHYS
58	#undef SHW_PTE_GET_U
59	#undef SHW_PTE_LOG64
60	#undef SHW_PTE_SET
61	#undef SHW_PTE_ATOMIC_SET
62	#undef SHW_PTE_ATOMIC_SET2
63	#undef SHW_PTE_SET_RO
64	#undef SHW_PTE_SET_RW
65	#undef SHW_PT_SHIFT
66	#undef SHW_PT_MASK
67	#undef SHW_TOTAL_PD_ENTRIES
68	#undef SHW_PDPT_SHIFT
69	#undef SHW_PDPT_MASK
70	#undef SHW_PDPE_PG_MASK
71
72	#if PGM_SHW_TYPE == PGM_TYPE_32BIT \|\| PGM_SHW_TYPE == PGM_TYPE_NESTED_32BIT
73	# define SHWUINT uint32_t
74	# define SHWPT X86PT
75	# define PSHWPT PX86PT
76	# define SHWPTE X86PTE
77	# define PSHWPTE PX86PTE
78	# define SHWPD X86PD
79	# define PSHWPD PX86PD
80	# define SHWPDE X86PDE
81	# define PSHWPDE PX86PDE
82	# define SHW_PDE_PG_MASK X86_PDE_PG_MASK
83	# define SHW_PD_SHIFT X86_PD_SHIFT
84	# define SHW_PD_MASK X86_PD_MASK
85	# define SHW_TOTAL_PD_ENTRIES X86_PG_ENTRIES
86	# define SHW_PDE_IS_P(Pde) ( (Pde).u & X86_PDE_P )
87	# define SHW_PDE_IS_A(Pde) ( (Pde).u & X86_PDE_A )
88	# define SHW_PDE_IS_BIG(Pde) ( (Pde).u & X86_PDE_PS )
89	# define SHW_PDE_ATOMIC_SET(Pde, uNew) do { ASMAtomicWriteU32(&(Pde).u, (uNew)); } while (0)
90	# define SHW_PDE_ATOMIC_SET2(Pde, Pde2) do { ASMAtomicWriteU32(&(Pde).u, (Pde2).u); } while (0)
91	# define SHW_PTE_PG_MASK X86_PTE_PG_MASK
92	# define SHW_PTE_IS_P(Pte) ( (Pte).u & X86_PTE_P )
93	# define SHW_PTE_IS_RW(Pte) ( (Pte).u & X86_PTE_RW )
94	# define SHW_PTE_IS_US(Pte) ( (Pte).u & X86_PTE_US )
95	# define SHW_PTE_IS_A(Pte) ( (Pte).u & X86_PTE_A )
96	# define SHW_PTE_IS_D(Pte) ( (Pte).u & X86_PTE_D )
97	# define SHW_PTE_IS_P_RW(Pte) ( ((Pte).u & (X86_PTE_P \| X86_PTE_RW)) == (X86_PTE_P \| X86_PTE_RW) )
98	# define SHW_PTE_IS_TRACK_DIRTY(Pte) ( !!((Pte).u & PGM_PTFLAGS_TRACK_DIRTY) )
99	# define SHW_PTE_GET_HCPHYS(Pte) ( (Pte).u & X86_PTE_PG_MASK )
100	# define SHW_PTE_LOG64(Pte) ( (uint64_t)(Pte).u )
101	# define SHW_PTE_GET_U(Pte) ( (Pte).u ) /*< Use with care. /
102	# define SHW_PTE_SET(Pte, uNew) do { (Pte).u = (uNew); } while (0)
103	# define SHW_PTE_ATOMIC_SET(Pte, uNew) do { ASMAtomicWriteU32(&(Pte).u, (uNew)); } while (0)
104	# define SHW_PTE_ATOMIC_SET2(Pte, Pte2) do { ASMAtomicWriteU32(&(Pte).u, (Pte2).u); } while (0)
105	# define SHW_PTE_SET_RO(Pte) do { (Pte).u &= ~(X86PGUINT)X86_PTE_RW; } while (0)
106	# define SHW_PTE_SET_RW(Pte) do { (Pte).u \|= X86_PTE_RW; } while (0)
107	# define SHW_PT_SHIFT X86_PT_SHIFT
108	# define SHW_PT_MASK X86_PT_MASK
109
110	#elif PGM_SHW_TYPE == PGM_TYPE_EPT
111	# define SHWUINT uint64_t
112	# define SHWPT EPTPT
113	# define PSHWPT PEPTPT
114	# define SHWPTE EPTPTE
115	# define PSHWPTE PEPTPTE
116	# define SHWPD EPTPD
117	# define PSHWPD PEPTPD
118	# define SHWPDE EPTPDE
119	# define PSHWPDE PEPTPDE
120	# define SHW_PDE_PG_MASK EPT_PDE_PG_MASK
121	# define SHW_PD_SHIFT EPT_PD_SHIFT
122	# define SHW_PD_MASK EPT_PD_MASK
123	# define SHW_PDE_IS_P(Pde) ( (Pde).u & EPT_E_READ /* always set*/ )
124	# define SHW_PDE_IS_A(Pde) ( 1 ) /* We don't use EPT_E_ACCESSED, use with care! */
125	# define SHW_PDE_IS_BIG(Pde) ( (Pde).u & EPT_E_LEAF )
126	# define SHW_PDE_ATOMIC_SET(Pde, uNew) do { ASMAtomicWriteU64(&(Pde).u, (uNew)); } while (0)
127	# define SHW_PDE_ATOMIC_SET2(Pde, Pde2) do { ASMAtomicWriteU64(&(Pde).u, (Pde2).u); } while (0)
128	# define SHW_PTE_PG_MASK EPT_PTE_PG_MASK
129	# define SHW_PTE_IS_P(Pte) ( (Pte).u & EPT_E_READ ) /* Approximation, works for us. */
130	# define SHW_PTE_IS_RW(Pte) ( (Pte).u & EPT_E_WRITE )
131	# define SHW_PTE_IS_US(Pte) ( true )
132	# define SHW_PTE_IS_A(Pte) ( true )
133	# define SHW_PTE_IS_D(Pte) ( true )
134	# define SHW_PTE_IS_P_RW(Pte) ( ((Pte).u & (EPT_E_READ \| EPT_E_WRITE)) == (EPT_E_READ \| EPT_E_WRITE) )
135	# define SHW_PTE_IS_TRACK_DIRTY(Pte) ( false )
136	# define SHW_PTE_GET_HCPHYS(Pte) ( (Pte).u & EPT_PTE_PG_MASK )
137	# define SHW_PTE_LOG64(Pte) ( (Pte).u )
138	# define SHW_PTE_GET_U(Pte) ( (Pte).u ) /*< Use with care. /
139	# define SHW_PTE_SET(Pte, uNew) do { (Pte).u = (uNew); } while (0)
140	# define SHW_PTE_ATOMIC_SET(Pte, uNew) do { ASMAtomicWriteU64(&(Pte).u, (uNew)); } while (0)
141	# define SHW_PTE_ATOMIC_SET2(Pte, Pte2) do { ASMAtomicWriteU64(&(Pte).u, (Pte2).u); } while (0)
142	# define SHW_PTE_SET_RO(Pte) do { (Pte).u &= ~(uint64_t)EPT_E_WRITE; } while (0)
143	# define SHW_PTE_SET_RW(Pte) do { (Pte).u \|= EPT_E_WRITE; } while (0)
144	# define SHW_PT_SHIFT EPT_PT_SHIFT
145	# define SHW_PT_MASK EPT_PT_MASK
146	# define SHW_PDPT_SHIFT EPT_PDPT_SHIFT
147	# define SHW_PDPT_MASK EPT_PDPT_MASK
148	# define SHW_PDPE_PG_MASK EPT_PDPE_PG_MASK
149	# define SHW_TOTAL_PD_ENTRIES (EPT_PG_AMD64_ENTRIES * EPT_PG_AMD64_PDPE_ENTRIES)
150
151	#else
152	# define SHWUINT uint64_t
153	# define SHWPT PGMSHWPTPAE
154	# define PSHWPT PPGMSHWPTPAE
155	# define SHWPTE PGMSHWPTEPAE
156	# define PSHWPTE PPGMSHWPTEPAE
157	# define SHWPD X86PDPAE
158	# define PSHWPD PX86PDPAE
159	# define SHWPDE X86PDEPAE
160	# define PSHWPDE PX86PDEPAE
161	# define SHW_PDE_PG_MASK X86_PDE_PAE_PG_MASK
162	# define SHW_PD_SHIFT X86_PD_PAE_SHIFT
163	# define SHW_PD_MASK X86_PD_PAE_MASK
164	# define SHW_PDE_IS_P(Pde) ( (Pde).u & X86_PDE_P )
165	# define SHW_PDE_IS_A(Pde) ( (Pde).u & X86_PDE_A )
166	# define SHW_PDE_IS_BIG(Pde) ( (Pde).u & X86_PDE_PS )
167	# define SHW_PDE_ATOMIC_SET(Pde, uNew) do { ASMAtomicWriteU64(&(Pde).u, (uNew)); } while (0)
168	# define SHW_PDE_ATOMIC_SET2(Pde, Pde2) do { ASMAtomicWriteU64(&(Pde).u, (Pde2).u); } while (0)
169	# define SHW_PTE_PG_MASK X86_PTE_PAE_PG_MASK
170	# define SHW_PTE_IS_P(Pte) PGMSHWPTEPAE_IS_P(Pte)
171	# define SHW_PTE_IS_RW(Pte) PGMSHWPTEPAE_IS_RW(Pte)
172	# define SHW_PTE_IS_US(Pte) PGMSHWPTEPAE_IS_US(Pte)
173	# define SHW_PTE_IS_A(Pte) PGMSHWPTEPAE_IS_A(Pte)
174	# define SHW_PTE_IS_D(Pte) PGMSHWPTEPAE_IS_D(Pte)
175	# define SHW_PTE_IS_P_RW(Pte) PGMSHWPTEPAE_IS_P_RW(Pte)
176	# define SHW_PTE_IS_TRACK_DIRTY(Pte) PGMSHWPTEPAE_IS_TRACK_DIRTY(Pte)
177	# define SHW_PTE_GET_HCPHYS(Pte) PGMSHWPTEPAE_GET_HCPHYS(Pte)
178	# define SHW_PTE_LOG64(Pte) PGMSHWPTEPAE_GET_LOG(Pte)
179	# define SHW_PTE_GET_U(Pte) PGMSHWPTEPAE_GET_U(Pte) /*< Use with care. /
180	# define SHW_PTE_SET(Pte, uNew) PGMSHWPTEPAE_SET(Pte, uNew)
181	# define SHW_PTE_ATOMIC_SET(Pte, uNew) PGMSHWPTEPAE_ATOMIC_SET(Pte, uNew)
182	# define SHW_PTE_ATOMIC_SET2(Pte, Pte2) PGMSHWPTEPAE_ATOMIC_SET2(Pte, Pte2)
183	# define SHW_PTE_SET_RO(Pte) PGMSHWPTEPAE_SET_RO(Pte)
184	# define SHW_PTE_SET_RW(Pte) PGMSHWPTEPAE_SET_RW(Pte)
185	# define SHW_PT_SHIFT X86_PT_PAE_SHIFT
186	# define SHW_PT_MASK X86_PT_PAE_MASK
187
188	# if PGM_SHW_TYPE == PGM_TYPE_AMD64 \|\| PGM_SHW_TYPE == PGM_TYPE_NESTED_AMD64 \|\| /* whatever: */ PGM_SHW_TYPE == PGM_TYPE_NONE
189	# define SHW_PDPT_SHIFT X86_PDPT_SHIFT
190	# define SHW_PDPT_MASK X86_PDPT_MASK_AMD64
191	# define SHW_PDPE_PG_MASK X86_PDPE_PG_MASK
192	# define SHW_TOTAL_PD_ENTRIES (X86_PG_AMD64_ENTRIES * X86_PG_AMD64_PDPE_ENTRIES)
193
194	# elif PGM_SHW_TYPE == PGM_TYPE_PAE \|\| PGM_SHW_TYPE == PGM_TYPE_NESTED_PAE
195	# define SHW_PDPT_SHIFT X86_PDPT_SHIFT
196	# define SHW_PDPT_MASK X86_PDPT_MASK_PAE
197	# define SHW_PDPE_PG_MASK X86_PDPE_PG_MASK
198	# define SHW_TOTAL_PD_ENTRIES (X86_PG_PAE_ENTRIES * X86_PG_PAE_PDPE_ENTRIES)
199
200	# else
201	# error "Misconfigured PGM_SHW_TYPE or something..."
202	# endif
203	#endif
204
205	#if PGM_SHW_TYPE == PGM_TYPE_NONE && PGM_TYPE_IS_NESTED_OR_EPT(PGM_SHW_TYPE)
206	# error "PGM_TYPE_IS_NESTED_OR_EPT is true for PGM_TYPE_NONE!"
207	#endif
208
209
210
211	/*********************************************************************************************************************************
212	* Internal Functions *
213	*********************************************************************************************************************************/
214	RT_C_DECLS_BEGIN
215	PGM_SHW_DECL(int, GetPage)(PVMCPUCC pVCpu, RTGCUINTPTR GCPtr, uint64_t *pfFlags, PRTHCPHYS pHCPhys);
216	PGM_SHW_DECL(int, ModifyPage)(PVMCPUCC pVCpu, RTGCUINTPTR GCPtr, size_t cbPages, uint64_t fFlags, uint64_t fMask, uint32_t fOpFlags);
217	PGM_SHW_DECL(int, Exit)(PVMCPUCC pVCpu);
218	#ifdef IN_RING3
219	PGM_SHW_DECL(int, Relocate)(PVMCPUCC pVCpu, RTGCPTR offDelta);
220	#endif
221	RT_C_DECLS_END
222
223
224	/**
225	* Enters the shadow mode.
226	*
227	* @returns VBox status code.
228	* @param pVCpu The cross context virtual CPU structure.
229	*/
230	PGM_SHW_DECL(int, Enter)(PVMCPUCC pVCpu)
231	{
232	#if PGM_TYPE_IS_NESTED_OR_EPT(PGM_SHW_TYPE)
233
234	# ifdef VBOX_WITH_NESTED_HWVIRT_VMX_EPT
235	RTGCPHYS GCPhysCR3;
236	PGMPOOLKIND enmKind;
237	if (pVCpu->pgm.s.enmGuestSlatMode != PGMSLAT_EPT)
238	{
239	GCPhysCR3 = RT_BIT_64(63);
240	enmKind = PGMPOOLKIND_ROOT_NESTED;
241	}
242	else
243	{
244	GCPhysCR3 = pVCpu->pgm.s.uEptPtr & EPT_EPTP_PG_MASK;
245	enmKind = PGMPOOLKIND_EPT_PML4_FOR_EPT_PML4;
246	}
247	# else
248	RTGCPHYS const GCPhysCR3 = RT_BIT_64(63);
249	PGMPOOLKIND const enmKind = PGMPOOLKIND_ROOT_NESTED;
250	# endif
251	PVMCC const pVM = pVCpu->CTX_SUFF(pVM);
252
253	Assert(HMIsNestedPagingActive(pVM));
254	Assert(pVM->pgm.s.fNestedPaging);
255	Assert(!pVCpu->pgm.s.pShwPageCR3R3);
256
257	PGM_LOCK_VOID(pVM);
258
259	PPGMPOOLPAGE pNewShwPageCR3;
260	int rc = pgmPoolAlloc(pVM, GCPhysCR3, enmKind, PGMPOOLACCESS_DONTCARE, PGM_A20_IS_ENABLED(pVCpu),
261	NIL_PGMPOOL_IDX, UINT32_MAX, true /fLockPage/,
262	&pNewShwPageCR3);
263	AssertLogRelRCReturnStmt(rc, PGM_UNLOCK(pVM), rc);
264
265	pVCpu->pgm.s.pShwPageCR3R3 = pgmPoolConvertPageToR3(pVM->pgm.s.CTX_SUFF(pPool), pNewShwPageCR3);
266	pVCpu->pgm.s.pShwPageCR3R0 = pgmPoolConvertPageToR0(pVM->pgm.s.CTX_SUFF(pPool), pNewShwPageCR3);
267
268	PGM_UNLOCK(pVM);
269
270	Log(("Enter nested shadow paging mode: root %RHv phys %RHp\n", pVCpu->pgm.s.pShwPageCR3R3, pVCpu->pgm.s.CTX_SUFF(pShwPageCR3)->Core.Key));
271	#else
272	NOREF(pVCpu);
273	#endif
274	return VINF_SUCCESS;
275	}
276
277
278	/**
279	* Exits the shadow mode.
280	*
281	* @returns VBox status code.
282	* @param pVCpu The cross context virtual CPU structure.
283	*/
284	PGM_SHW_DECL(int, Exit)(PVMCPUCC pVCpu)
285	{
286	#if PGM_TYPE_IS_NESTED_OR_EPT(PGM_SHW_TYPE)
287	PVMCC pVM = pVCpu->CTX_SUFF(pVM);
288	if (pVCpu->pgm.s.CTX_SUFF(pShwPageCR3))
289	{
290	PPGMPOOL pPool = pVM->pgm.s.CTX_SUFF(pPool);
291
292	PGM_LOCK_VOID(pVM);
293
294	# if defined(VBOX_WITH_NESTED_HWVIRT_VMX_EPT) && PGM_SHW_TYPE == PGM_TYPE_EPT
295	if (pVCpu->pgm.s.enmGuestSlatMode == PGMSLAT_EPT)
296	pgmPoolUnlockPage(pPool, pVCpu->pgm.s.CTX_SUFF(pShwPageCR3));
297	# endif
298
299	/* Do not unlock this page as we have two of them floating around in the 32-bit host & 64-bit guest case.
300	* We currently assert when you try to free one of them; don't bother to really allow this.
301	*
302	* Note that this is two nested paging root pages max. This isn't a leak. They are reused.
303	*/
304	/* pgmPoolUnlockPage(pPool, pVCpu->pgm.s.CTX_SUFF(pShwPageCR3)); */
305
306	pgmPoolFreeByPage(pPool, pVCpu->pgm.s.CTX_SUFF(pShwPageCR3), NIL_PGMPOOL_IDX, UINT32_MAX);
307	pVCpu->pgm.s.pShwPageCR3R3 = 0;
308	pVCpu->pgm.s.pShwPageCR3R0 = 0;
309
310	PGM_UNLOCK(pVM);
311
312	Log(("Leave nested shadow paging mode\n"));
313	}
314	#else
315	RT_NOREF_PV(pVCpu);
316	#endif
317	return VINF_SUCCESS;
318	}
319
320
321	#if 0
322	PGM_SHW_DECL(int, NestedGetPage)(PVMCPUCC pVCpu, PEPTPD pEptPd, PPGMPTWALK pWalk, uint64_t *pfFlags, PRTHCPHYS pHCPhys)
323	{
324	#if PGM_SHW_TYPE == PGM_TYPE_EPT
325	RTGCPHYS const GCPhysNested = pWalk->GCPhysNested;
326	unsigned const iEptPd = ((GCPhysNested >> SHW_PD_SHIFT) & SHW_PD_MASK);
327	Assert(iEptPd < EPT_PG_ENTRIES);
328	SHWPDE EptPde = pEptPd->a[iEptPd];
329	if (!SHW_PDE_IS_P(EptPde))
330	{
331	*pfFlags = 0;
332	*pHCPhys = NIL_RTHCPHYS;
333	return VERR_PAGE_TABLE_NOT_PRESENT;
334	}
335
336	if (SHW_PDE_IS_BIG(EptPde))
337	{
338	Assert(pWalk->fBigPage);
339	if (pfFlags)
340	*pfFlags = (EptPde.u & ~SHW_PDE_PG_MASK);
341	if (pHCPhys)
342	*pHCPhys = (EptPde.u & EPT_PDE2M_PG_MASK) + (pWalk->GCPhys & (RT_BIT(EPT_PD_SHIFT) - 1) & X86_PAGE_4K_BASE_MASK);
343	return VINF_SUCCESS;
344	}
345
346	PSHWPT pEptPt;
347	int const rc = PGM_HCPHYS_2_PTR(pVCpu->CTX_SUFF(pVM), pVCpu, EptPde.u & EPT_PDE_PG_MASK, &pEptPt);
348	if (RT_FAILURE(rc))
349	{
350	*pfFlags = 0;
351	*pHCPhys = NIL_RTHCPHYS;
352	return rc;
353	}
354
355	unsigned const iEptPt = (GCPhysNested >> SHW_PT_SHIFT) & SHW_PT_MASK;
356	Assert(iEptPt < EPT_PG_ENTRIES);
357	SHWPTE EptPte = pEptPt->a[iEptPt];
358	if (!SHW_PTE_IS_P(EptPte))
359	{
360	*pfFlags = 0;
361	*pHCPhys = NIL_RTHCPHYS;
362	return VERR_PAGE_NOT_PRESENT;
363	}
364
365	if (pfFlags)
366	{
367	/* Read, Write and Execute bits (Present mask) are cumulative. */
368	*pfFlags = (SHW_PTE_GET_U(EptPte) & ~SHW_PTE_PG_MASK)
369	& ((EptPde.u & EPT_PRESENT_MASK) \| ~(uint64_t)EPT_PRESENT_MASK);
370	}
371	if (pHCPhys)
372	*pHCPhys = SHW_PTE_GET_HCPHYS(EptPte);
373	return VINF_SUCCESS;
374
375	#else /* PGM_SHW_TYPE != PGM_TYPE_EPT */
376	RT_NOREF(pVCpu, pEptPd, pWalk, *pfFlags, pHCPhys);
377	AssertFailed();
378	return VERR_PGM_SHW_NONE_IPE;
379	#endif /* PGM_SHW_TYPE != PGM_TYPE_EPT */
380	}
381	#endif
382
383
384	/**
385	* Gets effective page information (from the VMM page directory).
386	*
387	* @returns VBox status code.
388	* @param pVCpu The cross context virtual CPU structure.
389	* @param GCPtr Guest Context virtual address of the page.
390	* @param pfFlags Where to store the flags. These are X86_PTE_*.
391	* @param pHCPhys Where to store the HC physical address of the page.
392	* This is page aligned.
393	* @remark You should use PGMMapGetPage() for pages in a mapping.
394	*/
395	PGM_SHW_DECL(int, GetPage)(PVMCPUCC pVCpu, RTGCUINTPTR GCPtr, uint64_t *pfFlags, PRTHCPHYS pHCPhys)
396	{
397	#if PGM_SHW_TYPE == PGM_TYPE_NONE
398	RT_NOREF(pVCpu, GCPtr);
399	AssertFailed();
400	*pfFlags = 0;
401	*pHCPhys = NIL_RTHCPHYS;
402	return VERR_PGM_SHW_NONE_IPE;
403
404	#else /* PGM_SHW_TYPE != PGM_TYPE_NONE */
405	PVMCC pVM = pVCpu->CTX_SUFF(pVM);
406
407	PGM_LOCK_ASSERT_OWNER(pVM);
408
409	/*
410	* Get the PDE.
411	*/
412	# if PGM_SHW_TYPE == PGM_TYPE_AMD64 \|\| PGM_SHW_TYPE == PGM_TYPE_NESTED_AMD64
413	X86PDEPAE Pde;
414
415	/* PML4 */
416	X86PML4E Pml4e = pgmShwGetLongModePML4E(pVCpu, GCPtr);
417	if (!(Pml4e.u & X86_PML4E_P))
418	return VERR_PAGE_TABLE_NOT_PRESENT;
419
420	/* PDPT */
421	PX86PDPT pPDPT;
422	int rc = PGM_HCPHYS_2_PTR(pVM, pVCpu, Pml4e.u & X86_PML4E_PG_MASK, &pPDPT);
423	if (RT_FAILURE(rc))
424	return rc;
425	const unsigned iPDPT = (GCPtr >> SHW_PDPT_SHIFT) & SHW_PDPT_MASK;
426	X86PDPE Pdpe = pPDPT->a[iPDPT];
427	if (!(Pdpe.u & X86_PDPE_P))
428	return VERR_PAGE_TABLE_NOT_PRESENT;
429
430	/* PD */
431	PX86PDPAE pPd;
432	rc = PGM_HCPHYS_2_PTR(pVM, pVCpu, Pdpe.u & X86_PDPE_PG_MASK, &pPd);
433	if (RT_FAILURE(rc))
434	return rc;
435	const unsigned iPd = (GCPtr >> SHW_PD_SHIFT) & SHW_PD_MASK;
436	Pde = pPd->a[iPd];
437
438	/* Merge accessed, write, user and no-execute bits into the PDE. */
439	AssertCompile(X86_PML4E_A == X86_PDPE_A && X86_PML4E_A == X86_PDE_A);
440	AssertCompile(X86_PML4E_RW == X86_PDPE_RW && X86_PML4E_RW == X86_PDE_RW);
441	AssertCompile(X86_PML4E_US == X86_PDPE_US && X86_PML4E_US == X86_PDE_US);
442	AssertCompile(X86_PML4E_NX == X86_PDPE_LM_NX && X86_PML4E_NX == X86_PDE_PAE_NX);
443	Pde.u &= (Pml4e.u & Pdpe.u) \| ~(X86PGPAEUINT)(X86_PML4E_A \| X86_PML4E_RW \| X86_PML4E_US);
444	Pde.u \|= (Pml4e.u \| Pdpe.u) & X86_PML4E_NX;
445
446	# elif PGM_SHW_TYPE == PGM_TYPE_PAE \|\| PGM_SHW_TYPE == PGM_TYPE_NESTED_PAE
447	X86PDEPAE Pde = pgmShwGetPaePDE(pVCpu, GCPtr);
448
449	# elif PGM_SHW_TYPE == PGM_TYPE_EPT
450	EPTPDE Pde;
451	const unsigned iPd = ((GCPtr >> SHW_PD_SHIFT) & SHW_PD_MASK);
452
453	if (pVCpu->pgm.s.enmGuestSlatMode == PGMSLAT_DIRECT)
454	{
455	PEPTPD pPDDst;
456	int rc = pgmShwGetEPTPDPtr(pVCpu, GCPtr, NULL, &pPDDst);
457	if (rc == VINF_SUCCESS) /** @todo this function isn't expected to return informational status codes. Check callers / fix. */
458	{ /* likely */ }
459	else
460	{
461	AssertRC(rc);
462	return rc;
463	}
464	Assert(pPDDst);
465	Pde = pPDDst->a[iPd];
466	}
467	else
468	{
469	# ifdef VBOX_WITH_NESTED_HWVIRT_VMX_EPT
470	Assert(pVCpu->pgm.s.enmGuestSlatMode == PGMSLAT_EPT);
471	Assert(!(GCPtr & GUEST_PAGE_OFFSET_MASK));
472	PGMPTWALK Walk;
473	PGMPTWALKGST GstWalkAll;
474	RTGCPHYS const GCPhysNestedPage = GCPtr;
475	int rc = pgmGstSlatWalk(pVCpu, GCPhysNestedPage, false /fIsLinearAddrValid/, 0 /GCPtrNestedFault/, &Walk,
476	&GstWalkAll);
477	if (RT_SUCCESS(rc))
478	{
479	# ifdef DEBUG_ramshankar
480	/* Paranoia. */
481	Assert(GstWalkAll.enmType == PGMPTWALKGSTTYPE_EPT);
482	Assert(Walk.fSucceeded);
483	Assert(Walk.fEffective & (PGM_PTATTRS_EPT_R_MASK \| PGM_PTATTRS_EPT_W_MASK \| PGM_PTATTRS_EPT_X_SUPER_MASK));
484	Assert(Walk.fIsSlat);
485	Assert(RT_BOOL(Walk.fEffective & PGM_PTATTRS_R_MASK) == RT_BOOL(Walk.fEffective & PGM_PTATTRS_EPT_R_MASK));
486	Assert(RT_BOOL(Walk.fEffective & PGM_PTATTRS_W_MASK) == RT_BOOL(Walk.fEffective & PGM_PTATTRS_EPT_W_MASK));
487	Assert(RT_BOOL(Walk.fEffective & PGM_PTATTRS_NX_MASK) == !RT_BOOL(Walk.fEffective & PGM_PTATTRS_EPT_X_SUPER_MASK));
488	# endif
489	PGM_A20_ASSERT_MASKED(pVCpu, Walk.GCPhys);
490
491	/* Update the nested-guest physical address with the translated guest-physical address. */
492	GCPtr = Walk.GCPhys;
493
494	/* Get the PD. */
495	PSHWPD pEptPd;
496	rc = pgmShwGetNestedEPTPDPtr(pVCpu, GCPhysNestedPage, NULL /ppPdpt/, &pEptPd, &GstWalkAll);
497	AssertRCReturn(rc, rc);
498	Assert(pEptPd);
499
500	Assert(iPd < EPT_PG_ENTRIES);
501	Pde = pEptPd->a[iPd];
502	}
503	else
504	{
505	Log(("Failed to translate nested-guest physical address %#RGp rc=%Rrc\n", GCPhysNestedPage, rc));
506	return rc;
507	}
508
509	# else /* !VBOX_WITH_NESTED_HWVIRT_VMX_EPT */
510	AssertFailed();
511	return VERR_PGM_SHW_NONE_IPE;
512	# endif /* !VBOX_WITH_NESTED_HWVIRT_VMX_EPT */
513	}
514
515	# elif PGM_SHW_TYPE == PGM_TYPE_32BIT \|\| PGM_SHW_TYPE == PGM_TYPE_NESTED_32BIT
516	X86PDE Pde = pgmShwGet32BitPDE(pVCpu, GCPtr);
517
518	# else
519	# error "Misconfigured PGM_SHW_TYPE or something..."
520	# endif
521	if (!SHW_PDE_IS_P(Pde))
522	return VERR_PAGE_TABLE_NOT_PRESENT;
523
524	/* Deal with large pages. */
525	if (SHW_PDE_IS_BIG(Pde))
526	{
527	/*
528	* Store the results.
529	* RW and US flags depend on the entire page translation hierarchy - except for
530	* legacy PAE which has a simplified PDPE.
531	*/
532	if (pfFlags)
533	{
534	*pfFlags = (Pde.u & ~SHW_PDE_PG_MASK);
535	# if PGM_WITH_NX(PGM_SHW_TYPE, PGM_SHW_TYPE) \|\| PGM_SHW_TYPE == PGM_TYPE_NESTED_PAE \|\| PGM_SHW_TYPE == PGM_TYPE_NESTED_AMD64
536	if ( (Pde.u & X86_PTE_PAE_NX)
537	# if PGM_WITH_NX(PGM_SHW_TYPE, PGM_SHW_TYPE)
538	&& CPUMIsGuestNXEnabled(pVCpu) /** @todo why do we have to check the guest state here? */
539	# endif
540	)
541	*pfFlags \|= X86_PTE_PAE_NX;
542	# endif
543	}
544
545	if (pHCPhys)
546	*pHCPhys = (Pde.u & SHW_PDE_PG_MASK) + (GCPtr & (RT_BIT(SHW_PD_SHIFT) - 1) & X86_PAGE_4K_BASE_MASK);
547
548	return VINF_SUCCESS;
549	}
550
551	/*
552	* Get PT entry.
553	*/
554	PSHWPT pPT;
555	int rc2 = PGM_HCPHYS_2_PTR(pVM, pVCpu, Pde.u & SHW_PDE_PG_MASK, &pPT);
556	if (RT_FAILURE(rc2))
557	return rc2;
558	const unsigned iPt = (GCPtr >> SHW_PT_SHIFT) & SHW_PT_MASK;
559	SHWPTE Pte = pPT->a[iPt];
560	if (!SHW_PTE_IS_P(Pte))
561	return VERR_PAGE_NOT_PRESENT;
562
563	/*
564	* Store the results.
565	* RW and US flags depend on the entire page translation hierarchy - except for
566	* legacy PAE which has a simplified PDPE.
567	*/
568	if (pfFlags)
569	{
570	*pfFlags = (SHW_PTE_GET_U(Pte) & ~SHW_PTE_PG_MASK)
571	& ((Pde.u & (X86_PTE_RW \| X86_PTE_US)) \| ~(uint64_t)(X86_PTE_RW \| X86_PTE_US));
572
573	# if PGM_WITH_NX(PGM_SHW_TYPE, PGM_SHW_TYPE) \|\| PGM_SHW_TYPE == PGM_TYPE_NESTED_PAE \|\| PGM_SHW_TYPE == PGM_TYPE_NESTED_AMD64
574	/* The NX bit is determined by a bitwise OR between the PT and PD */
575	if ( ((SHW_PTE_GET_U(Pte) \| Pde.u) & X86_PTE_PAE_NX)
576	# if PGM_WITH_NX(PGM_SHW_TYPE, PGM_SHW_TYPE)
577	&& CPUMIsGuestNXEnabled(pVCpu) /** @todo why do we have to check the guest state here? */
578	# endif
579	)
580	*pfFlags \|= X86_PTE_PAE_NX;
581	# endif
582	}
583
584	if (pHCPhys)
585	*pHCPhys = SHW_PTE_GET_HCPHYS(Pte);
586
587	return VINF_SUCCESS;
588	#endif /* PGM_SHW_TYPE != PGM_TYPE_NONE */
589	}
590
591
592	/**
593	* Modify page flags for a range of pages in the shadow context.
594	*
595	* The existing flags are ANDed with the fMask and ORed with the fFlags.
596	*
597	* @returns VBox status code.
598	* @param pVCpu The cross context virtual CPU structure.
599	* @param GCPtr Virtual address of the first page in the range. Page aligned!
600	* @param cb Size (in bytes) of the range to apply the modification to. Page aligned!
601	* @param fFlags The OR mask - page flags X86_PTE_*, excluding the page mask of course.
602	* @param fMask The AND mask - page flags X86_PTE_*.
603	* Be extremely CAREFUL with ~'ing values because they can be 32-bit!
604	* @param fOpFlags A combination of the PGM_MK_PK_XXX flags.
605	* @remark You must use PGMMapModifyPage() for pages in a mapping.
606	*/
607	PGM_SHW_DECL(int, ModifyPage)(PVMCPUCC pVCpu, RTGCUINTPTR GCPtr, size_t cb, uint64_t fFlags, uint64_t fMask, uint32_t fOpFlags)
608	{
609	#if PGM_SHW_TYPE == PGM_TYPE_NONE
610	RT_NOREF(pVCpu, GCPtr, cb, fFlags, fMask, fOpFlags);
611	AssertFailed();
612	return VERR_PGM_SHW_NONE_IPE;
613
614	#else /* PGM_SHW_TYPE != PGM_TYPE_NONE */
615	PVMCC pVM = pVCpu->CTX_SUFF(pVM);
616	PGM_LOCK_ASSERT_OWNER(pVM);
617
618	/*
619	* Walk page tables and pages till we're done.
620	*/
621	int rc;
622	for (;;)
623	{
624	/*
625	* Get the PDE.
626	*/
627	# if PGM_SHW_TYPE == PGM_TYPE_AMD64 \|\| PGM_SHW_TYPE == PGM_TYPE_NESTED_AMD64
628	X86PDEPAE Pde;
629	/* PML4 */
630	X86PML4E Pml4e = pgmShwGetLongModePML4E(pVCpu, GCPtr);
631	if (!(Pml4e.u & X86_PML4E_P))
632	return VERR_PAGE_TABLE_NOT_PRESENT;
633
634	/* PDPT */
635	PX86PDPT pPDPT;
636	rc = PGM_HCPHYS_2_PTR(pVM, pVCpu, Pml4e.u & X86_PML4E_PG_MASK, &pPDPT);
637	if (RT_FAILURE(rc))
638	return rc;
639	const unsigned iPDPT = (GCPtr >> SHW_PDPT_SHIFT) & SHW_PDPT_MASK;
640	X86PDPE Pdpe = pPDPT->a[iPDPT];
641	if (!(Pdpe.u & X86_PDPE_P))
642	return VERR_PAGE_TABLE_NOT_PRESENT;
643
644	/* PD */
645	PX86PDPAE pPd;
646	rc = PGM_HCPHYS_2_PTR(pVM, pVCpu, Pdpe.u & X86_PDPE_PG_MASK, &pPd);
647	if (RT_FAILURE(rc))
648	return rc;
649	const unsigned iPd = (GCPtr >> SHW_PD_SHIFT) & SHW_PD_MASK;
650	Pde = pPd->a[iPd];
651
652	# elif PGM_SHW_TYPE == PGM_TYPE_PAE \|\| PGM_SHW_TYPE == PGM_TYPE_NESTED_PAE
653	X86PDEPAE Pde = pgmShwGetPaePDE(pVCpu, GCPtr);
654
655	# elif PGM_SHW_TYPE == PGM_TYPE_EPT
656	EPTPDE Pde;
657	const unsigned iPd = ((GCPtr >> SHW_PD_SHIFT) & SHW_PD_MASK);
658	if (pVCpu->pgm.s.enmGuestSlatMode == PGMSLAT_DIRECT)
659	{
660	PEPTPD pPDDst;
661	rc = pgmShwGetEPTPDPtr(pVCpu, GCPtr, NULL, &pPDDst);
662	if (rc != VINF_SUCCESS)
663	{
664	AssertRC(rc);
665	return rc;
666	}
667	Assert(pPDDst);
668	Pde = pPDDst->a[iPd];
669	}
670	else
671	{
672	# ifdef VBOX_WITH_NESTED_HWVIRT_VMX_EPT
673	Assert(pVCpu->pgm.s.enmGuestSlatMode == PGMSLAT_EPT);
674	Assert(!(GCPtr & GUEST_PAGE_OFFSET_MASK));
675	PGMPTWALK Walk;
676	PGMPTWALKGST GstWalkAll;
677	RTGCPHYS const GCPhysNestedPage = GCPtr;
678	rc = pgmGstSlatWalk(pVCpu, GCPhysNestedPage, false /fIsLinearAddrValid/, 0 /GCPtrNestedFault/, &Walk,
679	&GstWalkAll);
680	if (RT_SUCCESS(rc))
681	{
682	# ifdef DEBUG_ramshankar
683	/* Paranoia. */
684	Assert(GstWalkAll.enmType == PGMPTWALKGSTTYPE_EPT);
685	Assert(Walk.fSucceeded);
686	Assert(Walk.fEffective & (PGM_PTATTRS_EPT_R_MASK \| PGM_PTATTRS_EPT_W_MASK \| PGM_PTATTRS_EPT_X_SUPER_MASK));
687	Assert(Walk.fIsSlat);
688	Assert(RT_BOOL(Walk.fEffective & PGM_PTATTRS_R_MASK) == RT_BOOL(Walk.fEffective & PGM_PTATTRS_EPT_R_MASK));
689	Assert(RT_BOOL(Walk.fEffective & PGM_PTATTRS_W_MASK) == RT_BOOL(Walk.fEffective & PGM_PTATTRS_EPT_W_MASK));
690	Assert(RT_BOOL(Walk.fEffective & PGM_PTATTRS_NX_MASK) == !RT_BOOL(Walk.fEffective & PGM_PTATTRS_EPT_X_SUPER_MASK));
691	# endif
692	PGM_A20_ASSERT_MASKED(pVCpu, Walk.GCPhys);
693	Assert(!(fFlags & X86_PTE_RW) \|\| (Walk.fEffective & PGM_PTATTRS_W_MASK));
694
695	/* Update the nested-guest physical address with the translated guest-physical address. */
696	GCPtr = Walk.GCPhys;
697
698	/* Get the PD. */
699	PSHWPD pEptPd;
700	rc = pgmShwGetNestedEPTPDPtr(pVCpu, GCPhysNestedPage, NULL /ppPdpt/, &pEptPd, &GstWalkAll);
701	AssertRCReturn(rc, rc);
702	Assert(pEptPd);
703	Assert(iPd < EPT_PG_ENTRIES);
704	Pde = pEptPd->a[iPd];
705	}
706	else
707	{
708	Log(("Failed to translate nested-guest physical address %#RGp rc=%Rrc\n", GCPhysNestedPage, rc));
709	return rc;
710	}
711
712	# else /* !VBOX_WITH_NESTED_HWVIRT_VMX_EPT */
713	AssertFailed();
714	return VERR_PGM_SHW_NONE_IPE;
715	# endif /* !VBOX_WITH_NESTED_HWVIRT_VMX_EPT */
716	}
717
718	# else /* PGM_TYPE_32BIT \|\| PGM_SHW_TYPE == PGM_TYPE_NESTED_32BIT */
719	X86PDE Pde = pgmShwGet32BitPDE(pVCpu, GCPtr);
720	# endif
721	if (!SHW_PDE_IS_P(Pde))
722	return VERR_PAGE_TABLE_NOT_PRESENT;
723
724	AssertFatalMsg(!SHW_PDE_IS_BIG(Pde), ("Pde=%#RX64\n", (uint64_t)Pde.u));
725
726	/*
727	* Map the page table.
728	*/
729	PSHWPT pPT;
730	rc = PGM_HCPHYS_2_PTR(pVM, pVCpu, Pde.u & SHW_PDE_PG_MASK, &pPT);
731	if (RT_FAILURE(rc))
732	return rc;
733
734	unsigned iPTE = (GCPtr >> SHW_PT_SHIFT) & SHW_PT_MASK;
735	while (iPTE < RT_ELEMENTS(pPT->a))
736	{
737	if (SHW_PTE_IS_P(pPT->a[iPTE]))
738	{
739	SHWPTE const OrgPte = pPT->a[iPTE];
740	SHWPTE NewPte;
741
742	SHW_PTE_SET(NewPte, (SHW_PTE_GET_U(OrgPte) & (fMask \| SHW_PTE_PG_MASK)) \| (fFlags & ~SHW_PTE_PG_MASK));
743	if (!SHW_PTE_IS_P(NewPte))
744	{
745	/** @todo Some CSAM code path might end up here and upset
746	* the page pool. */
747	AssertMsgFailed(("NewPte=%#RX64 OrgPte=%#RX64 GCPtr=%#RGv\n", SHW_PTE_LOG64(NewPte), SHW_PTE_LOG64(OrgPte), GCPtr));
748	}
749	else if ( SHW_PTE_IS_RW(NewPte)
750	&& !SHW_PTE_IS_RW(OrgPte)
751	&& !(fOpFlags & PGM_MK_PG_IS_MMIO2) )
752	{
753	/** @todo Optimize \#PF handling by caching data. We can
754	* then use this when PGM_MK_PG_IS_WRITE_FAULT is
755	* set instead of resolving the guest physical
756	* address yet again. */
757	PGMPTWALK GstWalk;
758	rc = PGMGstGetPage(pVCpu, GCPtr, &GstWalk);
759	AssertRC(rc);
760	if (RT_SUCCESS(rc))
761	{
762	Assert((GstWalk.fEffective & X86_PTE_RW) \|\| !(CPUMGetGuestCR0(pVCpu) & X86_CR0_WP /* allow netware hack */));
763	PPGMPAGE pPage = pgmPhysGetPage(pVM, GstWalk.GCPhys);
764	Assert(pPage);
765	if (pPage)
766	{
767	rc = pgmPhysPageMakeWritable(pVM, pPage, GstWalk.GCPhys);
768	AssertRCReturn(rc, rc);
769	Log(("%s: pgmPhysPageMakeWritable on %RGv / %RGp %R[pgmpage]\n", __PRETTY_FUNCTION__, GCPtr, GstWalk.GCPhys, pPage));
770	}
771	}
772	}
773
774	SHW_PTE_ATOMIC_SET2(pPT->a[iPTE], NewPte);
775	Assert((SHW_PTE_GET_U(NewPte) & EPT_E_LEAF) == (SHW_PTE_GET_U(OrgPte) & EPT_E_LEAF));
776
777	# if PGM_SHW_TYPE == PGM_TYPE_EPT
778	HMInvalidatePhysPage(pVM, (RTGCPHYS)GCPtr);
779	# else
780	PGM_INVL_PG_ALL_VCPU(pVM, GCPtr);
781	# endif
782	}
783
784	/* next page */
785	cb -= HOST_PAGE_SIZE;
786	if (!cb)
787	return VINF_SUCCESS;
788	GCPtr += HOST_PAGE_SIZE;
789	iPTE++;
790	}
791	}
792	#endif /* PGM_SHW_TYPE != PGM_TYPE_NONE */
793	}
794
795
796	#ifdef IN_RING3
797	/**
798	* Relocate any GC pointers related to shadow mode paging.
799	*
800	* @returns VBox status code.
801	* @param pVCpu The cross context virtual CPU structure.
802	* @param offDelta The relocation offset.
803	*/
804	PGM_SHW_DECL(int, Relocate)(PVMCPUCC pVCpu, RTGCPTR offDelta)
805	{
806	RT_NOREF(pVCpu, offDelta);
807	return VINF_SUCCESS;
808	}
809	#endif
810

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source: vbox/trunk/src/VBox/VMM/VMMAll/PGMAllShw.h@ 105844

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