PGMAllPhys.cpp@ 8863

Last change on this file since 8863 was 8155, checked in by vboxsync, 17 years ago
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1	/* $Id: PGMAllPhys.cpp 8155 2008-04-18 15:16:47Z vboxsync $ */
2	/** @file
3	* PGM - Page Manager and Monitor, Physical Memory Addressing.
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	/** @def PGM_IGNORE_RAM_FLAGS_RESERVED
23	* Don't respect the MM_RAM_FLAGS_RESERVED flag when converting to HC addresses.
24	*
25	* Since this flag is currently incorrectly kept set for ROM regions we will
26	* have to ignore it for now so we don't break stuff.
27	*
28	* @todo this has been fixed now I believe, remove this hack.
29	*/
30	#define PGM_IGNORE_RAM_FLAGS_RESERVED
31
32
33	/*******************************************************************************
34	* Header Files *
35	*******************************************************************************/
36	#define LOG_GROUP LOG_GROUP_PGM_PHYS
37	#include <VBox/pgm.h>
38	#include <VBox/trpm.h>
39	#include <VBox/vmm.h>
40	#include <VBox/iom.h>
41	#include <VBox/em.h>
42	#include <VBox/rem.h>
43	#include "PGMInternal.h"
44	#include <VBox/vm.h>
45	#include <VBox/param.h>
46	#include <VBox/err.h>
47	#include <iprt/assert.h>
48	#include <iprt/string.h>
49	#include <iprt/asm.h>
50	#include <VBox/log.h>
51	#ifdef IN_RING3
52	# include <iprt/thread.h>
53	#endif
54
55
56
57	#ifndef IN_RING3
58
59	/**
60	* \#PF Handler callback for Guest ROM range write access.
61	* We simply ignore the writes or fall back to the recompiler if we don't support the instruction.
62	*
63	* @returns VBox status code (appropritate for trap handling and GC return).
64	* @param pVM VM Handle.
65	* @param uErrorCode CPU Error code.
66	* @param pRegFrame Trap register frame.
67	* @param pvFault The fault address (cr2).
68	* @param GCPhysFault The GC physical address corresponding to pvFault.
69	* @param pvUser User argument. Pointer to the ROM range structure.
70	*/
71	PGMDECL(int) pgmPhysRomWriteHandler(PVM pVM, RTGCUINT uErrorCode, PCPUMCTXCORE pRegFrame, void pvFault, RTGCPHYS GCPhysFault, void pvUser)
72	{
73	int rc;
74	#ifdef VBOX_WITH_NEW_PHYS_CODE
75	PPGMROMRANGE pRom = (PPGMROMRANGE)pvUser;
76	uint32_t iPage = GCPhysFault - pRom->GCPhys;
77	Assert(iPage < (pRom->cb >> PAGE_SHIFT));
78	switch (pRom->aPages[iPage].enmProt)
79	{
80	case PGMROMPROT_READ_ROM_WRITE_IGNORE:
81	case PGMROMPROT_READ_RAM_WRITE_IGNORE:
82	{
83	#endif
84	/*
85	* If it's a simple instruction which doesn't change the cpu state
86	* we will simply skip it. Otherwise we'll have to defer it to REM.
87	*/
88	uint32_t cbOp;
89	DISCPUSTATE Cpu;
90	rc = EMInterpretDisasOne(pVM, pRegFrame, &Cpu, &cbOp);
91	if ( RT_SUCCESS(rc)
92	&& Cpu.mode == CPUMODE_32BIT
93	&& !(Cpu.prefix & (PREFIX_REPNE \| PREFIX_REP \| PREFIX_SEG)))
94	{
95	switch (Cpu.opcode)
96	{
97	/** @todo Find other instructions we can safely skip, possibly
98	* adding this kind of detection to DIS or EM. */
99	case OP_MOV:
100	pRegFrame->eip += cbOp;
101	STAM_COUNTER_INC(&pVM->pgm.s.StatGCGuestROMWriteHandled);
102	return VINF_SUCCESS;
103	}
104	}
105	else if (RT_UNLIKELY(rc == VERR_INTERNAL_ERROR))
106	return rc;
107	#ifdef VBOX_WITH_NEW_PHYS_CODE
108	break;
109	}
110
111	case PGMROMPROT_READ_RAM_WRITE_RAM:
112	rc = PGMHandlerPhysicalPageTempOff(pVM, pRom->GCPhys, GCPhysFault & X86_PTE_PG_MASK);
113	AssertRC(rc);
114	case PGMROMPROT_READ_ROM_WRITE_RAM:
115	/* Handle it in ring-3 because it's way easier there. */
116	break;
117
118	default:
119	AssertMsgFailedReturn(("enmProt=%d iPage=%d GCPhysFault=%RGp\n",
120	pRom->aPages[iPage].enmProt, iPage, GCPhysFault),
121	VERR_INTERNAL_ERROR);
122	}
123	#endif
124
125	STAM_COUNTER_INC(&pVM->pgm.s.StatGCGuestROMWriteUnhandled);
126	return VINF_EM_RAW_EMULATE_INSTR;
127	}
128
129	#endif /* IN_RING3 */
130
131	/**
132	* Checks if Address Gate 20 is enabled or not.
133	*
134	* @returns true if enabled.
135	* @returns false if disabled.
136	* @param pVM VM handle.
137	*/
138	PGMDECL(bool) PGMPhysIsA20Enabled(PVM pVM)
139	{
140	LogFlow(("PGMPhysIsA20Enabled %d\n", pVM->pgm.s.fA20Enabled));
141	return !!pVM->pgm.s.fA20Enabled ; /* stupid MS compiler doesn't trust me. */
142	}
143
144
145	/**
146	* Validates a GC physical address.
147	*
148	* @returns true if valid.
149	* @returns false if invalid.
150	* @param pVM The VM handle.
151	* @param GCPhys The physical address to validate.
152	*/
153	PGMDECL(bool) PGMPhysIsGCPhysValid(PVM pVM, RTGCPHYS GCPhys)
154	{
155	PPGMPAGE pPage = pgmPhysGetPage(&pVM->pgm.s, GCPhys);
156	return pPage != NULL;
157	}
158
159
160	/**
161	* Checks if a GC physical address is a normal page,
162	* i.e. not ROM, MMIO or reserved.
163	*
164	* @returns true if normal.
165	* @returns false if invalid, ROM, MMIO or reserved page.
166	* @param pVM The VM handle.
167	* @param GCPhys The physical address to check.
168	*/
169	PGMDECL(bool) PGMPhysIsGCPhysNormal(PVM pVM, RTGCPHYS GCPhys)
170	{
171	PPGMPAGE pPage = pgmPhysGetPage(&pVM->pgm.s, GCPhys);
172	return pPage
173	&& !(pPage->HCPhys & (MM_RAM_FLAGS_MMIO \| MM_RAM_FLAGS_ROM \| MM_RAM_FLAGS_RESERVED \| MM_RAM_FLAGS_MMIO2));
174	}
175
176
177	/**
178	* Converts a GC physical address to a HC physical address.
179	*
180	* @returns VINF_SUCCESS on success.
181	* @returns VERR_PGM_PHYS_PAGE_RESERVED it it's a valid GC physical
182	* page but has no physical backing.
183	* @returns VERR_PGM_INVALID_GC_PHYSICAL_ADDRESS if it's not a valid
184	* GC physical address.
185	*
186	* @param pVM The VM handle.
187	* @param GCPhys The GC physical address to convert.
188	* @param pHCPhys Where to store the HC physical address on success.
189	*/
190	PGMDECL(int) PGMPhysGCPhys2HCPhys(PVM pVM, RTGCPHYS GCPhys, PRTHCPHYS pHCPhys)
191	{
192	PPGMPAGE pPage;
193	int rc = pgmPhysGetPageEx(&pVM->pgm.s, GCPhys, &pPage);
194	if (VBOX_FAILURE(rc))
195	return rc;
196
197	#ifndef PGM_IGNORE_RAM_FLAGS_RESERVED
198	if (RT_UNLIKELY(pPage->HCPhys & MM_RAM_FLAGS_RESERVED)) /** @todo PAGE FLAGS */
199	return VERR_PGM_PHYS_PAGE_RESERVED;
200	#endif
201
202	*pHCPhys = PGM_PAGE_GET_HCPHYS(pPage) \| (GCPhys & PAGE_OFFSET_MASK);
203	return VINF_SUCCESS;
204	}
205
206
207	/**
208	* Invalidates the GC page mapping TLB.
209	*
210	* @param pVM The VM handle.
211	*/
212	PDMDECL(void) PGMPhysInvalidatePageGCMapTLB(PVM pVM)
213	{
214	/* later */
215	NOREF(pVM);
216	}
217
218
219	/**
220	* Invalidates the ring-0 page mapping TLB.
221	*
222	* @param pVM The VM handle.
223	*/
224	PDMDECL(void) PGMPhysInvalidatePageR0MapTLB(PVM pVM)
225	{
226	PGMPhysInvalidatePageR3MapTLB(pVM);
227	}
228
229
230	/**
231	* Invalidates the ring-3 page mapping TLB.
232	*
233	* @param pVM The VM handle.
234	*/
235	PDMDECL(void) PGMPhysInvalidatePageR3MapTLB(PVM pVM)
236	{
237	pgmLock(pVM);
238	for (unsigned i = 0; i < RT_ELEMENTS(pVM->pgm.s.PhysTlbHC.aEntries); i++)
239	{
240	pVM->pgm.s.PhysTlbHC.aEntries[i].GCPhys = NIL_RTGCPHYS;
241	pVM->pgm.s.PhysTlbHC.aEntries[i].pPage = 0;
242	pVM->pgm.s.PhysTlbHC.aEntries[i].pMap = 0;
243	pVM->pgm.s.PhysTlbHC.aEntries[i].pv = 0;
244	}
245	pgmUnlock(pVM);
246	}
247
248
249	/**
250	* Frees the specified RAM page.
251	*
252	* This is used by ballooning and remapping MMIO2.
253	*
254	* @param pVM Pointer to the shared VM structure.
255	* @param pPage Pointer to the page structure.
256	* @param GCPhys The guest physical address of the page, if applicable.
257	*/
258	void pgmPhysFreePage(PVM pVM, PPGMPAGE pPage, RTGCPHYS GCPhys)
259	{
260	AssertFatal(PGM_PAGE_GET_TYPE(pPage) == PGMPAGETYPE_RAM);
261
262	/** @todo implement this... */
263	AssertFatalFailed();
264	}
265
266
267
268	/**
269	* Makes sure that there is at least one handy page ready for use.
270	*
271	* This will also take the appropriate actions when reaching water-marks.
272	*
273	* @returns The following VBox status codes.
274	* @retval VINF_SUCCESS on success.
275	* @retval VERR_EM_NO_MEMORY if we're really out of memory.
276	*
277	* @param pVM The VM handle.
278	*
279	* @remarks Must be called from within the PGM critical section. It may
280	* nip back to ring-3/0 in some cases.
281	*/
282	static int pgmPhysEnsureHandyPage(PVM pVM)
283	{
284	/** @remarks
285	* low-water mark logic for R0 & GC:
286	* - 75%: Set FF.
287	* - 50%: Force return to ring-3 ASAP.
288	*
289	* For ring-3 there is a little problem wrt to the recompiler, so:
290	* - 75%: Set FF.
291	* - 50%: Try allocate pages; on failure we'll force REM to quite ASAP.
292	*
293	* The basic idea is that we should be able to get out of any situation with
294	* only 50% of handy pages remaining.
295	*
296	* At the moment we'll not adjust the number of handy pages relative to the
297	* actual VM RAM committment, that's too much work for now.
298	*/
299	Assert(pVM->pgm.s.cHandyPages <= RT_ELEMENTS(pVM->pgm.s.aHandyPages));
300	if ( !pVM->pgm.s.cHandyPages
301	#ifdef IN_RING3
302	\|\| pVM->pgm.s.cHandyPages - 1 <= RT_ELEMENTS(pVM->pgm.s.aHandyPages) / 2 /* 50% */
303	#endif
304	)
305	{
306	Log(("PGM: cHandyPages=%u out of %u -> allocate more\n", pVM->pgm.s.cHandyPages - 1 <= RT_ELEMENTS(pVM->pgm.s.aHandyPages)));
307	#ifdef IN_RING3
308	int rc = SUPCallVMMR0Ex(pVM->pVMR0, VMMR0_DO_PGM_ALLOCATE_HANDY_PAGES, 0, NULL);
309	#elif defined(IN_RING0)
310	/** @todo call PGMR0PhysAllocateHandyPages directly - need to make sure we can call kernel code first and deal with the seeding fallback. */
311	int rc = VMMR0CallHost(pVM, VMMCALLHOST_PGM_ALLOCATE_HANDY_PAGES, 0);
312	#else
313	int rc = VMMGCCallHost(pVM, VMMCALLHOST_PGM_ALLOCATE_HANDY_PAGES, 0);
314	#endif
315	if (RT_UNLIKELY(rc != VINF_SUCCESS))
316	{
317	Assert(rc == VINF_EM_NO_MEMORY);
318	if (!pVM->pgm.s.cHandyPages)
319	{
320	LogRel(("PGM: no more handy pages!\n"));
321	return VERR_EM_NO_MEMORY;
322	}
323	Assert(VM_FF_ISSET(pVM, VM_FF_PGM_NEED_HANDY_PAGES));
324	#ifdef IN_RING3
325	REMR3NotifyFF(pVM);
326	#else
327	VM_FF_SET(pVM, VM_FF_TO_R3);
328	#endif
329	}
330	Assert(pVM->pgm.s.cHandyPages <= RT_ELEMENTS(pVM->pgm.s.aHandyPages));
331	}
332	else if (pVM->pgm.s.cHandyPages - 1 <= (RT_ELEMENTS(pVM->pgm.s.aHandyPages) / 4) * 3) /* 75% */
333	{
334	VM_FF_SET(pVM, VM_FF_PGM_NEED_HANDY_PAGES);
335	#ifndef IN_RING3
336	if (pVM->pgm.s.cHandyPages - 1 <= RT_ELEMENTS(pVM->pgm.s.aHandyPages) / 2)
337	{
338	Log(("PGM: VM_FF_TO_R3 - cHandyPages=%u out of %u\n", pVM->pgm.s.cHandyPages - 1 <= RT_ELEMENTS(pVM->pgm.s.aHandyPages)));
339	VM_FF_SET(pVM, VM_FF_TO_R3);
340	}
341	#endif
342	}
343
344	return VINF_SUCCESS;
345	}
346
347
348	/**
349	* Replace a zero or shared page with new page that we can write to.
350	*
351	* @returns The following VBox status codes.
352	* @retval VINF_SUCCESS on success, pPage is modified.
353	* @retval VERR_EM_NO_MEMORY if we're totally out of memory.
354	*
355	* @todo Propagate VERR_EM_NO_MEMORY up the call tree.
356	*
357	* @param pVM The VM address.
358	* @param pPage The physical page tracking structure. This will
359	* be modified on success.
360	* @param GCPhys The address of the page.
361	*
362	* @remarks Must be called from within the PGM critical section. It may
363	* nip back to ring-3/0 in some cases.
364	*
365	* @remarks This function shouldn't really fail, however if it does
366	* it probably means we've screwed up the size of the amount
367	* and/or the low-water mark of handy pages. Or, that some
368	* device I/O is causing a lot of pages to be allocated while
369	* while the host is in a low-memory condition.
370	*/
371	int pgmPhysAllocPage(PVM pVM, PPGMPAGE pPage, RTGCPHYS GCPhys)
372	{
373	/*
374	* Ensure that we've got a page handy, take it and use it.
375	*/
376	int rc = pgmPhysEnsureHandyPage(pVM);
377	if (VBOX_FAILURE(rc))
378	{
379	Assert(rc == VERR_EM_NO_MEMORY);
380	return rc;
381	}
382	AssertMsg(PGM_PAGE_IS_ZERO(pPage) \|\| PGM_PAGE_IS_SHARED(pPage), ("%d %RGp\n", PGM_PAGE_GET_STATE(pPage), GCPhys));
383	Assert(!PGM_PAGE_IS_RESERVED(pPage));
384	Assert(!PGM_PAGE_IS_MMIO(pPage));
385
386	uint32_t iHandyPage = --pVM->pgm.s.cHandyPages;
387	Assert(iHandyPage < RT_ELEMENTS(pVM->pgm.s.aHandyPages));
388	Assert(pVM->pgm.s.aHandyPages[iHandyPage].HCPhysGCPhys != NIL_RTHCPHYS);
389	Assert(!(pVM->pgm.s.aHandyPages[iHandyPage].HCPhysGCPhys & ~X86_PTE_PAE_PG_MASK));
390	Assert(pVM->pgm.s.aHandyPages[iHandyPage].idPage != NIL_GMM_PAGEID);
391	Assert(pVM->pgm.s.aHandyPages[iHandyPage].idSharedPage == NIL_GMM_PAGEID);
392
393	/*
394	* There are one or two action to be taken the next time we allocate handy pages:
395	* - Tell the GMM (global memory manager) what the page is being used for.
396	* (Speeds up replacement operations - sharing and defragmenting.)
397	* - If the current backing is shared, it must be freed.
398	*/
399	const RTHCPHYS HCPhys = pVM->pgm.s.aHandyPages[iHandyPage].HCPhysGCPhys;
400	pVM->pgm.s.aHandyPages[iHandyPage].HCPhysGCPhys = GCPhys;
401
402	if (PGM_PAGE_IS_SHARED(pPage))
403	{
404	pVM->pgm.s.aHandyPages[iHandyPage].idSharedPage = PGM_PAGE_GET_PAGEID(pPage);
405	Assert(PGM_PAGE_GET_PAGEID(pPage) != NIL_GMM_PAGEID);
406	VM_FF_SET(pVM, VM_FF_PGM_NEED_HANDY_PAGES);
407
408	Log2(("PGM: Replaced shared page %#x at %RGp with %#x / %RHp\n", PGM_PAGE_GET_PAGEID(pPage),
409	GCPhys, pVM->pgm.s.aHandyPages[iHandyPage].idPage, HCPhys));
410	STAM_COUNTER_INC(&pVM->pgm.s.StatPageReplaceShared);
411	pVM->pgm.s.cSharedPages--;
412	/** @todo err.. what about copying the page content? */
413	}
414	else
415	{
416	Log2(("PGM: Replaced zero page %RGp with %#x / %RHp\n", GCPhys, pVM->pgm.s.aHandyPages[iHandyPage].idPage, HCPhys));
417	STAM_COUNTER_INC(&pVM->pgm.s.StatPageReplaceZero);
418	pVM->pgm.s.cZeroPages--;
419	/** @todo verify that the handy page is zero! */
420	}
421
422	/*
423	* Do the PGMPAGE modifications.
424	*/
425	pVM->pgm.s.cPrivatePages++;
426	PGM_PAGE_SET_HCPHYS(pPage, HCPhys);
427	PGM_PAGE_SET_PAGEID(pPage, pVM->pgm.s.aHandyPages[iHandyPage].idPage);
428	PGM_PAGE_SET_STATE(pPage, PGM_PAGE_STATE_ALLOCATED);
429
430	return VINF_SUCCESS;
431	}
432
433
434	/**
435	* Deal with pages that are not writable, i.e. not in the ALLOCATED state.
436	*
437	* @returns VBox status code.
438	* @retval VINF_SUCCESS on success.
439	* @retval VERR_PGM_PHYS_PAGE_RESERVED it it's a valid page but has no physical backing.
440	*
441	* @param pVM The VM address.
442	* @param pPage The physical page tracking structure.
443	* @param GCPhys The address of the page.
444	*
445	* @remarks Called from within the PGM critical section.
446	*/
447	int pgmPhysPageMakeWritable(PVM pVM, PPGMPAGE pPage, RTGCPHYS GCPhys)
448	{
449	switch (PGM_PAGE_GET_STATE(pPage))
450	{
451	case PGM_PAGE_STATE_WRITE_MONITORED:
452	PGM_PAGE_SET_WRITTEN_TO(pPage);
453	PGM_PAGE_SET_STATE(pPage, PGM_PAGE_STATE_ALLOCATED);
454	/* fall thru */
455	default: /* to shut up GCC */
456	case PGM_PAGE_STATE_ALLOCATED:
457	return VINF_SUCCESS;
458
459	/*
460	* Zero pages can be dummy pages for MMIO or reserved memory,
461	* so we need to check the flags before joining cause with
462	* shared page replacement.
463	*/
464	case PGM_PAGE_STATE_ZERO:
465	if ( PGM_PAGE_IS_MMIO(pPage)
466	\|\| PGM_PAGE_IS_RESERVED(pPage))
467	return VERR_PGM_PHYS_PAGE_RESERVED;
468	/* fall thru */
469	case PGM_PAGE_STATE_SHARED:
470	return pgmPhysAllocPage(pVM, pPage, GCPhys);
471	}
472	}
473
474
475	/**
476	* Maps a page into the current virtual address space so it can be accessed.
477	*
478	* @returns VBox status code.
479	* @retval VINF_SUCCESS on success.
480	* @retval VERR_PGM_PHYS_PAGE_RESERVED it it's a valid page but has no physical backing.
481	*
482	* @param pVM The VM address.
483	* @param pPage The physical page tracking structure.
484	* @param GCPhys The address of the page.
485	* @param ppMap Where to store the address of the mapping tracking structure.
486	* @param ppv Where to store the mapping address of the page. The page
487	* offset is masked off!
488	*
489	* @remarks Called from within the PGM critical section.
490	*/
491	int pgmPhysPageMap(PVM pVM, PPGMPAGE pPage, RTGCPHYS GCPhys, PPPGMPAGEMAP ppMap, void **ppv)
492	{
493	#ifdef IN_GC
494	/*
495	* Just some sketchy GC code.
496	*/
497	*ppMap = NULL;
498	RTHCPHYS HCPhys = PGM_PAGE_GET_HCPHYS(pPage);
499	Assert(HCPhys != pVM->pgm.s.HCPhysZeroPg);
500	return PGMGCDynMapHCPage(pVM, HCPhys, ppv);
501
502	#else /* IN_RING3 \|\| IN_RING0 */
503
504	/*
505	* Find/make Chunk TLB entry for the mapping chunk.
506	*/
507	PPGMCHUNKR3MAP pMap;
508	const uint32_t idChunk = PGM_PAGE_GET_CHUNKID(pPage);
509	PPGMCHUNKR3MAPTLBE pTlbe = &pVM->pgm.s.ChunkR3Map.Tlb.aEntries[PGM_CHUNKR3MAPTLB_IDX(idChunk)];
510	if (pTlbe->idChunk == idChunk)
511	{
512	STAM_COUNTER_INC(&pVM->pgm.s.StatChunkR3MapTlbHits);
513	pMap = pTlbe->pChunk;
514	}
515	else if (idChunk != NIL_GMM_CHUNKID)
516	{
517	STAM_COUNTER_INC(&pVM->pgm.s.StatChunkR3MapTlbMisses);
518
519	/*
520	* Find the chunk, map it if necessary.
521	*/
522	pMap = (PPGMCHUNKR3MAP)RTAvlU32Get(&pVM->pgm.s.ChunkR3Map.pTree, idChunk);
523	if (!pMap)
524	{
525	#ifdef IN_RING0
526	int rc = VMMR0CallHost(pVM, VMMCALLHOST_PGM_MAP_CHUNK, idChunk);
527	AssertRCReturn(rc, rc);
528	pMap = (PPGMCHUNKR3MAP)RTAvlU32Get(&pVM->pgm.s.ChunkR3Map.pTree, idChunk);
529	Assert(pMap);
530	#else
531	int rc = pgmR3PhysChunkMap(pVM, idChunk, &pMap);
532	if (VBOX_FAILURE(rc))
533	return rc;
534	#endif
535	}
536
537	/*
538	* Enter it into the Chunk TLB.
539	*/
540	pTlbe->idChunk = idChunk;
541	pTlbe->pChunk = pMap;
542	pMap->iAge = 0;
543	}
544	else
545	{
546	Assert(PGM_PAGE_IS_ZERO(pPage));
547	*ppv = pVM->pgm.s.CTXALLSUFF(pvZeroPg);
548	*ppMap = NULL;
549	return VINF_SUCCESS;
550	}
551
552	ppv = (uint8_t )pMap->pv + (PGM_PAGE_GET_PAGE_IN_CHUNK(pPage) << PAGE_SHIFT);
553	*ppMap = pMap;
554	return VINF_SUCCESS;
555	#endif /* IN_RING3 */
556	}
557
558
559	#ifndef IN_GC
560	/**
561	* Load a guest page into the ring-3 physical TLB.
562	*
563	* @returns VBox status code.
564	* @retval VINF_SUCCESS on success
565	* @retval VERR_PGM_INVALID_GC_PHYSICAL_ADDRESS if it's not a valid physical address.
566	* @param pPGM The PGM instance pointer.
567	* @param GCPhys The guest physical address in question.
568	*/
569	int pgmPhysPageLoadIntoTlb(PPGM pPGM, RTGCPHYS GCPhys)
570	{
571	STAM_COUNTER_INC(&pPGM->CTXMID(StatPage,MapTlbMisses));
572
573	/*
574	* Find the ram range.
575	* 99.8% of requests are expected to be in the first range.
576	*/
577	PPGMRAMRANGE pRam = CTXALLSUFF(pPGM->pRamRanges);
578	RTGCPHYS off = GCPhys - pRam->GCPhys;
579	if (RT_UNLIKELY(off >= pRam->cb))
580	{
581	do
582	{
583	pRam = CTXALLSUFF(pRam->pNext);
584	if (!pRam)
585	return VERR_PGM_INVALID_GC_PHYSICAL_ADDRESS;
586	off = GCPhys - pRam->GCPhys;
587	} while (off >= pRam->cb);
588	}
589
590	/*
591	* Map the page.
592	* Make a special case for the zero page as it is kind of special.
593	*/
594	PPGMPAGE pPage = &pRam->aPages[off >> PAGE_SHIFT];
595	PPGMPAGEMAPTLBE pTlbe = &pPGM->CTXSUFF(PhysTlb).aEntries[PGM_PAGEMAPTLB_IDX(GCPhys)];
596	if (!PGM_PAGE_IS_ZERO(pPage))
597	{
598	void *pv;
599	PPGMPAGEMAP pMap;
600	int rc = pgmPhysPageMap(PGM2VM(pPGM), pPage, GCPhys, &pMap, &pv);
601	if (VBOX_FAILURE(rc))
602	return rc;
603	pTlbe->pMap = pMap;
604	pTlbe->pv = pv;
605	}
606	else
607	{
608	Assert(PGM_PAGE_GET_HCPHYS(pPage) == pPGM->HCPhysZeroPg);
609	pTlbe->pMap = NULL;
610	pTlbe->pv = pPGM->CTXALLSUFF(pvZeroPg);
611	}
612	pTlbe->pPage = pPage;
613	return VINF_SUCCESS;
614	}
615	#endif /* !IN_GC */
616
617
618	/**
619	* Requests the mapping of a guest page into the current context.
620	*
621	* This API should only be used for very short term, as it will consume
622	* scarse resources (R0 and GC) in the mapping cache. When you're done
623	* with the page, call PGMPhysReleasePageMappingLock() ASAP to release it.
624	*
625	* This API will assume your intention is to write to the page, and will
626	* therefore replace shared and zero pages. If you do not intend to modify
627	* the page, use the PGMPhysGCPhys2CCPtrReadOnly() API.
628	*
629	* @returns VBox status code.
630	* @retval VINF_SUCCESS on success.
631	* @retval VERR_PGM_PHYS_PAGE_RESERVED it it's a valid page but has no physical backing.
632	* @retval VERR_PGM_INVALID_GC_PHYSICAL_ADDRESS if it's not a valid physical address.
633	*
634	* @param pVM The VM handle.
635	* @param GCPhys The guest physical address of the page that should be mapped.
636	* @param ppv Where to store the address corresponding to GCPhys.
637	* @param pLock Where to store the lock information that PGMPhysReleasePageMappingLock needs.
638	*
639	* @remark Avoid calling this API from within critical sections (other than
640	* the PGM one) because of the deadlock risk.
641	* @thread Any thread.
642	*/
643	PGMDECL(int) PGMPhysGCPhys2CCPtr(PVM pVM, RTGCPHYS GCPhys, void **ppv, PPGMPAGEMAPLOCK pLock)
644	{
645	#ifdef VBOX_WITH_NEW_PHYS_CODE
646	#ifdef IN_GC
647	/* Until a physical TLB is implemented for GC, let PGMGCDynMapGCPageEx handle it. */
648	return PGMGCDynMapGCPageEx(pVM, GCPhys, ppv);
649	#else
650	int rc = pgmLock(pVM);
651	AssertRCReturn(rc);
652
653	/*
654	* Query the Physical TLB entry for the page (may fail).
655	*/
656	PGMPHYSTLBE pTlbe;
657	int rc = pgmPhysPageQueryTlbe(&pVM->pgm.s, GCPhys, &pTlbe);
658	if (RT_SUCCESS(rc))
659	{
660	/*
661	* If the page is shared, the zero page, or being write monitored
662	* it must be converted to an page that's writable if possible.
663	*/
664	PPGMPAGE pPage = pTlbe->pPage;
665	if (RT_UNLIKELY(PGM_PAGE_GET_STATE(pPage) != PGM_PAGE_STATE_ALLOCATED))
666	{
667	rc = pgmPhysPageMakeWritable(pVM, pPage, GCPhys);
668	/** @todo stuff is missing here! */
669	}
670	if (RT_SUCCESS(rc))
671	{
672	/*
673	* Now, just perform the locking and calculate the return address.
674	*/
675	PPGMPAGEMAP pMap = pTlbe->pMap;
676	pMap->cRefs++;
677	if (RT_LIKELY(pPage->cLocks != PGM_PAGE_MAX_LOCKS))
678	if (RT_UNLIKELY(++pPage->cLocks == PGM_PAGE_MAX_LOCKS))
679	{
680	AssertMsgFailed(("%VGp is entering permanent locked state!\n", GCPhys));
681	pMap->cRefs++; /* Extra ref to prevent it from going away. */
682	}
683
684	ppv = (void )((uintptr_t)pTlbe->pv \| (GCPhys & PAGE_OFFSET_MASK));
685	pLock->pvPage = pPage;
686	pLock->pvMap = pMap;
687	}
688	}
689
690	pgmUnlock(pVM);
691	return rc;
692
693	#endif /* IN_RING3 \|\| IN_RING0 */
694
695	#else
696	/*
697	* Temporary fallback code.
698	*/
699	# ifdef IN_GC
700	return PGMGCDynMapGCPageEx(pVM, GCPhys, ppv);
701	# else
702	return PGMPhysGCPhys2HCPtr(pVM, GCPhys, 1, ppv);
703	# endif
704	#endif
705	}
706
707
708	/**
709	* Requests the mapping of a guest page into the current context.
710	*
711	* This API should only be used for very short term, as it will consume
712	* scarse resources (R0 and GC) in the mapping cache. When you're done
713	* with the page, call PGMPhysReleasePageMappingLock() ASAP to release it.
714	*
715	* @returns VBox status code.
716	* @retval VINF_SUCCESS on success.
717	* @retval VERR_PGM_PHYS_PAGE_RESERVED it it's a valid page but has no physical backing.
718	* @retval VERR_PGM_INVALID_GC_PHYSICAL_ADDRESS if it's not a valid physical address.
719	*
720	* @param pVM The VM handle.
721	* @param GCPhys The guest physical address of the page that should be mapped.
722	* @param ppv Where to store the address corresponding to GCPhys.
723	* @param pLock Where to store the lock information that PGMPhysReleasePageMappingLock needs.
724	*
725	* @remark Avoid calling this API from within critical sections (other than
726	* the PGM one) because of the deadlock risk.
727	* @thread Any thread.
728	*/
729	PGMDECL(int) PGMPhysGCPhys2CCPtrReadOnly(PVM pVM, RTGCPHYS GCPhys, void const **ppv, PPGMPAGEMAPLOCK pLock)
730	{
731	/** @todo implement this */
732	return PGMPhysGCPhys2CCPtr(pVM, GCPhys, (void **)ppv, pLock);
733	}
734
735
736	/**
737	* Requests the mapping of a guest page given by virtual address into the current context.
738	*
739	* This API should only be used for very short term, as it will consume
740	* scarse resources (R0 and GC) in the mapping cache. When you're done
741	* with the page, call PGMPhysReleasePageMappingLock() ASAP to release it.
742	*
743	* This API will assume your intention is to write to the page, and will
744	* therefore replace shared and zero pages. If you do not intend to modify
745	* the page, use the PGMPhysGCPtr2CCPtrReadOnly() API.
746	*
747	* @returns VBox status code.
748	* @retval VINF_SUCCESS on success.
749	* @retval VERR_PAGE_TABLE_NOT_PRESENT if the page directory for the virtual address isn't present.
750	* @retval VERR_PAGE_NOT_PRESENT if the page at the virtual address isn't present.
751	* @retval VERR_PGM_PHYS_PAGE_RESERVED it it's a valid page but has no physical backing.
752	* @retval VERR_PGM_INVALID_GC_PHYSICAL_ADDRESS if it's not a valid physical address.
753	*
754	* @param pVM The VM handle.
755	* @param GCPhys The guest physical address of the page that should be mapped.
756	* @param ppv Where to store the address corresponding to GCPhys.
757	* @param pLock Where to store the lock information that PGMPhysReleasePageMappingLock needs.
758	*
759	* @remark Avoid calling this API from within critical sections (other than
760	* the PGM one) because of the deadlock risk.
761	* @thread EMT
762	*/
763	PGMDECL(int) PGMPhysGCPtr2CCPtr(PVM pVM, RTGCPTR GCPtr, void **ppv, PPGMPAGEMAPLOCK pLock)
764	{
765	RTGCPHYS GCPhys;
766	int rc = PGMPhysGCPtr2GCPhys(pVM, GCPtr, &GCPhys);
767	if (VBOX_SUCCESS(rc))
768	rc = PGMPhysGCPhys2CCPtr(pVM, GCPhys, ppv, pLock);
769	return rc;
770	}
771
772
773	/**
774	* Requests the mapping of a guest page given by virtual address into the current context.
775	*
776	* This API should only be used for very short term, as it will consume
777	* scarse resources (R0 and GC) in the mapping cache. When you're done
778	* with the page, call PGMPhysReleasePageMappingLock() ASAP to release it.
779	*
780	* @returns VBox status code.
781	* @retval VINF_SUCCESS on success.
782	* @retval VERR_PAGE_TABLE_NOT_PRESENT if the page directory for the virtual address isn't present.
783	* @retval VERR_PAGE_NOT_PRESENT if the page at the virtual address isn't present.
784	* @retval VERR_PGM_PHYS_PAGE_RESERVED it it's a valid page but has no physical backing.
785	* @retval VERR_PGM_INVALID_GC_PHYSICAL_ADDRESS if it's not a valid physical address.
786	*
787	* @param pVM The VM handle.
788	* @param GCPhys The guest physical address of the page that should be mapped.
789	* @param ppv Where to store the address corresponding to GCPhys.
790	* @param pLock Where to store the lock information that PGMPhysReleasePageMappingLock needs.
791	*
792	* @remark Avoid calling this API from within critical sections (other than
793	* the PGM one) because of the deadlock risk.
794	* @thread EMT
795	*/
796	PGMDECL(int) PGMPhysGCPtr2CCPtrReadOnly(PVM pVM, RTGCPTR GCPtr, void const **ppv, PPGMPAGEMAPLOCK pLock)
797	{
798	RTGCPHYS GCPhys;
799	int rc = PGMPhysGCPtr2GCPhys(pVM, GCPtr, &GCPhys);
800	if (VBOX_SUCCESS(rc))
801	rc = PGMPhysGCPhys2CCPtrReadOnly(pVM, GCPhys, ppv, pLock);
802	return rc;
803	}
804
805
806	/**
807	* Release the mapping of a guest page.
808	*
809	* This is the counter part of PGMPhysGCPhys2CCPtr, PGMPhysGCPhys2CCPtrReadOnly
810	* PGMPhysGCPtr2CCPtr and PGMPhysGCPtr2CCPtrReadOnly.
811	*
812	* @param pVM The VM handle.
813	* @param pLock The lock structure initialized by the mapping function.
814	*/
815	PGMDECL(void) PGMPhysReleasePageMappingLock(PVM pVM, PPGMPAGEMAPLOCK pLock)
816	{
817	#ifdef VBOX_WITH_NEW_PHYS_CODE
818	#ifdef IN_GC
819	/* currently nothing to do here. */
820	/* --- postponed
821	#elif defined(IN_RING0)
822	*/
823
824	#else /* IN_RING3 */
825	pgmLock(pVM);
826
827	PPGMPAGE pPage = (PPGMPAGE)pLock->pvPage;
828	Assert(pPage->cLocks >= 1);
829	if (pPage->cLocks != PGM_PAGE_MAX_LOCKS)
830	pPage->cLocks--;
831
832	PPGMCHUNKR3MAP pChunk = (PPGMCHUNKR3MAP)pLock->pvChunk;
833	Assert(pChunk->cRefs >= 1);
834	pChunk->cRefs--;
835	pChunk->iAge = 0;
836
837	pgmUnlock(pVM);
838	#endif /* IN_RING3 */
839	#else
840	NOREF(pVM);
841	NOREF(pLock);
842	#endif
843	}
844
845
846	/**
847	* Converts a GC physical address to a HC pointer.
848	*
849	* @returns VINF_SUCCESS on success.
850	* @returns VERR_PGM_PHYS_PAGE_RESERVED it it's a valid GC physical
851	* page but has no physical backing.
852	* @returns VERR_PGM_INVALID_GC_PHYSICAL_ADDRESS if it's not a valid
853	* GC physical address.
854	* @returns VERR_PGM_GCPHYS_RANGE_CROSSES_BOUNDARY if the range crosses
855	* a dynamic ram chunk boundary
856	* @param pVM The VM handle.
857	* @param GCPhys The GC physical address to convert.
858	* @param cbRange Physical range
859	* @param pHCPtr Where to store the HC pointer on success.
860	*/
861	PGMDECL(int) PGMPhysGCPhys2HCPtr(PVM pVM, RTGCPHYS GCPhys, RTUINT cbRange, PRTHCPTR pHCPtr)
862	{
863	#ifdef VBOX_WITH_NEW_PHYS_CODE
864	VM_ASSERT_EMT(pVM); /* no longer safe for use outside the EMT thread! */
865	#endif
866
867	if ((GCPhys & PGM_DYNAMIC_CHUNK_BASE_MASK) != ((GCPhys+cbRange-1) & PGM_DYNAMIC_CHUNK_BASE_MASK))
868	{
869	AssertMsgFailed(("%VGp - %VGp crosses a chunk boundary!!\n", GCPhys, GCPhys+cbRange));
870	LogRel(("PGMPhysGCPhys2HCPtr %VGp - %VGp crosses a chunk boundary!!\n", GCPhys, GCPhys+cbRange));
871	return VERR_PGM_GCPHYS_RANGE_CROSSES_BOUNDARY;
872	}
873
874	PPGMRAMRANGE pRam;
875	PPGMPAGE pPage;
876	int rc = pgmPhysGetPageAndRangeEx(&pVM->pgm.s, GCPhys, &pPage, &pRam);
877	if (VBOX_FAILURE(rc))
878	return rc;
879
880	#ifndef PGM_IGNORE_RAM_FLAGS_RESERVED
881	if (RT_UNLIKELY(PGM_PAGE_IS_RESERVED(pPage)))
882	return VERR_PGM_PHYS_PAGE_RESERVED;
883	#endif
884
885	RTGCPHYS off = GCPhys - pRam->GCPhys;
886	if (RT_UNLIKELY(off + cbRange > pRam->cb))
887	{
888	AssertMsgFailed(("%VGp - %VGp crosses a chunk boundary!!\n", GCPhys, GCPhys + cbRange));
889	return VERR_PGM_GCPHYS_RANGE_CROSSES_BOUNDARY;
890	}
891
892	if (pRam->fFlags & MM_RAM_FLAGS_DYNAMIC_ALLOC)
893	{
894	unsigned iChunk = (off >> PGM_DYNAMIC_CHUNK_SHIFT);
895	*pHCPtr = (RTHCPTR)((RTHCUINTPTR)CTXSUFF(pRam->pavHCChunk)[iChunk] + (off & PGM_DYNAMIC_CHUNK_OFFSET_MASK));
896	}
897	else if (RT_LIKELY(pRam->pvHC))
898	*pHCPtr = (RTHCPTR)((RTHCUINTPTR)pRam->pvHC + off);
899	else
900	return VERR_PGM_PHYS_PAGE_RESERVED;
901	return VINF_SUCCESS;
902	}
903
904
905	/**
906	* Converts a guest pointer to a GC physical address.
907	*
908	* This uses the current CR3/CR0/CR4 of the guest.
909	*
910	* @returns VBox status code.
911	* @param pVM The VM Handle
912	* @param GCPtr The guest pointer to convert.
913	* @param pGCPhys Where to store the GC physical address.
914	*/
915	PGMDECL(int) PGMPhysGCPtr2GCPhys(PVM pVM, RTGCPTR GCPtr, PRTGCPHYS pGCPhys)
916	{
917	int rc = PGM_GST_PFN(GetPage,pVM)(pVM, (RTGCUINTPTR)GCPtr, NULL, pGCPhys);
918	if (pGCPhys && VBOX_SUCCESS(rc))
919	*pGCPhys \|= (RTGCUINTPTR)GCPtr & PAGE_OFFSET_MASK;
920	return rc;
921	}
922
923
924	/**
925	* Converts a guest pointer to a HC physical address.
926	*
927	* This uses the current CR3/CR0/CR4 of the guest.
928	*
929	* @returns VBox status code.
930	* @param pVM The VM Handle
931	* @param GCPtr The guest pointer to convert.
932	* @param pHCPhys Where to store the HC physical address.
933	*/
934	PGMDECL(int) PGMPhysGCPtr2HCPhys(PVM pVM, RTGCPTR GCPtr, PRTHCPHYS pHCPhys)
935	{
936	RTGCPHYS GCPhys;
937	int rc = PGM_GST_PFN(GetPage,pVM)(pVM, (RTGCUINTPTR)GCPtr, NULL, &GCPhys);
938	if (VBOX_SUCCESS(rc))
939	rc = PGMPhysGCPhys2HCPhys(pVM, GCPhys \| ((RTGCUINTPTR)GCPtr & PAGE_OFFSET_MASK), pHCPhys);
940	return rc;
941	}
942
943
944	/**
945	* Converts a guest pointer to a HC pointer.
946	*
947	* This uses the current CR3/CR0/CR4 of the guest.
948	*
949	* @returns VBox status code.
950	* @param pVM The VM Handle
951	* @param GCPtr The guest pointer to convert.
952	* @param pHCPtr Where to store the HC virtual address.
953	*/
954	PGMDECL(int) PGMPhysGCPtr2HCPtr(PVM pVM, RTGCPTR GCPtr, PRTHCPTR pHCPtr)
955	{
956	#ifdef VBOX_WITH_NEW_PHYS_CODE
957	VM_ASSERT_EMT(pVM); /* no longer safe for use outside the EMT thread! */
958	#endif
959
960	RTGCPHYS GCPhys;
961	int rc = PGM_GST_PFN(GetPage,pVM)(pVM, (RTGCUINTPTR)GCPtr, NULL, &GCPhys);
962	if (VBOX_SUCCESS(rc))
963	rc = PGMPhysGCPhys2HCPtr(pVM, GCPhys \| ((RTGCUINTPTR)GCPtr & PAGE_OFFSET_MASK), 1 /* we always stay within one page */, pHCPtr);
964	return rc;
965	}
966
967
968	/**
969	* Converts a guest virtual address to a HC pointer by specfied CR3 and flags.
970	*
971	* @returns VBox status code.
972	* @param pVM The VM Handle
973	* @param GCPtr The guest pointer to convert.
974	* @param cr3 The guest CR3.
975	* @param fFlags Flags used for interpreting the PD correctly: X86_CR4_PSE and X86_CR4_PAE
976	* @param pHCPtr Where to store the HC pointer.
977	*
978	* @remark This function is used by the REM at a time where PGM could
979	* potentially not be in sync. It could also be used by a
980	* future DBGF API to cpu state independent conversions.
981	*/
982	PGMDECL(int) PGMPhysGCPtr2HCPtrByGstCR3(PVM pVM, RTGCPTR GCPtr, uint64_t cr3, unsigned fFlags, PRTHCPTR pHCPtr)
983	{
984	#ifdef VBOX_WITH_NEW_PHYS_CODE
985	VM_ASSERT_EMT(pVM); /* no longer safe for use outside the EMT thread! */
986	#endif
987	/*
988	* PAE or 32-bit?
989	*/
990	int rc;
991	if (!(fFlags & X86_CR4_PAE))
992	{
993	PX86PD pPD;
994	rc = PGM_GCPHYS_2_PTR(pVM, cr3 & X86_CR3_PAGE_MASK, &pPD);
995	if (VBOX_SUCCESS(rc))
996	{
997	X86PDE Pde = pPD->a[(RTGCUINTPTR)GCPtr >> X86_PD_SHIFT];
998	if (Pde.n.u1Present)
999	{
1000	if ((fFlags & X86_CR4_PSE) && Pde.b.u1Size)
1001	{ /* (big page) */
1002	rc = PGMPhysGCPhys2HCPtr(pVM, (Pde.u & X86_PDE4M_PG_MASK) \| ((RTGCUINTPTR)GCPtr & X86_PAGE_4M_OFFSET_MASK), 1 /* we always stay within one page */, pHCPtr);
1003	}
1004	else
1005	{ /* (normal page) */
1006	PX86PT pPT;
1007	rc = PGM_GCPHYS_2_PTR(pVM, Pde.u & X86_PDE_PG_MASK, &pPT);
1008	if (VBOX_SUCCESS(rc))
1009	{
1010	X86PTE Pte = pPT->a[((RTGCUINTPTR)GCPtr >> X86_PT_SHIFT) & X86_PT_MASK];
1011	if (Pte.n.u1Present)
1012	return PGMPhysGCPhys2HCPtr(pVM, (Pte.u & X86_PTE_PG_MASK) \| ((RTGCUINTPTR)GCPtr & PAGE_OFFSET_MASK), 1 /* we always stay within one page */, pHCPtr);
1013	rc = VERR_PAGE_NOT_PRESENT;
1014	}
1015	}
1016	}
1017	else
1018	rc = VERR_PAGE_TABLE_NOT_PRESENT;
1019	}
1020	}
1021	else
1022	{
1023	/** @todo long mode! */
1024	Assert(PGMGetGuestMode(pVM) < PGMMODE_AMD64);
1025
1026	PX86PDPT pPdpt;
1027	rc = PGM_GCPHYS_2_PTR(pVM, cr3 & X86_CR3_PAE_PAGE_MASK, &pPdpt);
1028	if (VBOX_SUCCESS(rc))
1029	{
1030	X86PDPE Pdpe = pPdpt->a[((RTGCUINTPTR)GCPtr >> X86_PDPT_SHIFT) & X86_PDPT_MASK_PAE];
1031	if (Pdpe.n.u1Present)
1032	{
1033	PX86PDPAE pPD;
1034	rc = PGM_GCPHYS_2_PTR(pVM, Pdpe.u & X86_PDPE_PG_MASK, &pPD);
1035	if (VBOX_SUCCESS(rc))
1036	{
1037	X86PDEPAE Pde = pPD->a[((RTGCUINTPTR)GCPtr >> X86_PD_PAE_SHIFT) & X86_PD_PAE_MASK];
1038	if (Pde.n.u1Present)
1039	{
1040	if ((fFlags & X86_CR4_PSE) && Pde.b.u1Size)
1041	{ /* (big page) */
1042	rc = PGMPhysGCPhys2HCPtr(pVM, (Pde.u & X86_PDE2M_PAE_PG_MASK) \| ((RTGCUINTPTR)GCPtr & X86_PAGE_2M_OFFSET_MASK), 1 /* we always stay within one page */, pHCPtr);
1043	}
1044	else
1045	{ /* (normal page) */
1046	PX86PTPAE pPT;
1047	rc = PGM_GCPHYS_2_PTR(pVM, (Pde.u & X86_PDE_PAE_PG_MASK), &pPT);
1048	if (VBOX_SUCCESS(rc))
1049	{
1050	X86PTEPAE Pte = pPT->a[((RTGCUINTPTR)GCPtr >> X86_PT_PAE_SHIFT) & X86_PT_PAE_MASK];
1051	if (Pte.n.u1Present)
1052	return PGMPhysGCPhys2HCPtr(pVM, (Pte.u & X86_PTE_PAE_PG_MASK) \| ((RTGCUINTPTR)GCPtr & PAGE_OFFSET_MASK), 1 /* we always stay within one page */, pHCPtr);
1053	rc = VERR_PAGE_NOT_PRESENT;
1054	}
1055	}
1056	}
1057	else
1058	rc = VERR_PAGE_TABLE_NOT_PRESENT;
1059	}
1060	}
1061	else
1062	rc = VERR_PAGE_TABLE_NOT_PRESENT;
1063	}
1064	}
1065	return rc;
1066	}
1067
1068
1069	#undef LOG_GROUP
1070	#define LOG_GROUP LOG_GROUP_PGM_PHYS_ACCESS
1071
1072
1073	#ifdef IN_RING3
1074	/**
1075	* Cache PGMPhys memory access
1076	*
1077	* @param pVM VM Handle.
1078	* @param pCache Cache structure pointer
1079	* @param GCPhys GC physical address
1080	* @param pbHC HC pointer corresponding to physical page
1081	*
1082	* @thread EMT.
1083	*/
1084	static void pgmPhysCacheAdd(PVM pVM, PGMPHYSCACHE pCache, RTGCPHYS GCPhys, uint8_t pbHC)
1085	{
1086	uint32_t iCacheIndex;
1087
1088	Assert(VM_IS_EMT(pVM));
1089
1090	GCPhys = PHYS_PAGE_ADDRESS(GCPhys);
1091	pbHC = (uint8_t *)PAGE_ADDRESS(pbHC);
1092
1093	iCacheIndex = ((GCPhys >> PAGE_SHIFT) & PGM_MAX_PHYSCACHE_ENTRIES_MASK);
1094
1095	ASMBitSet(&pCache->aEntries, iCacheIndex);
1096
1097	pCache->Entry[iCacheIndex].GCPhys = GCPhys;
1098	pCache->Entry[iCacheIndex].pbHC = pbHC;
1099	}
1100	#endif
1101
1102	/**
1103	* Read physical memory.
1104	*
1105	* This API respects access handlers and MMIO. Use PGMPhysReadGCPhys() if you
1106	* want to ignore those.
1107	*
1108	* @param pVM VM Handle.
1109	* @param GCPhys Physical address start reading from.
1110	* @param pvBuf Where to put the read bits.
1111	* @param cbRead How many bytes to read.
1112	*/
1113	PGMDECL(void) PGMPhysRead(PVM pVM, RTGCPHYS GCPhys, void *pvBuf, size_t cbRead)
1114	{
1115	#ifdef IN_RING3
1116	bool fGrabbedLock = false;
1117	#endif
1118
1119	AssertMsg(cbRead > 0, ("don't even think about reading zero bytes!\n"));
1120	if (cbRead == 0)
1121	return;
1122
1123	LogFlow(("PGMPhysRead: %VGp %d\n", GCPhys, cbRead));
1124
1125	#ifdef IN_RING3
1126	if (!VM_IS_EMT(pVM))
1127	{
1128	pgmLock(pVM);
1129	fGrabbedLock = true;
1130	}
1131	#endif
1132
1133	/*
1134	* Copy loop on ram ranges.
1135	*/
1136	PPGMRAMRANGE pRam = CTXALLSUFF(pVM->pgm.s.pRamRanges);
1137	for (;;)
1138	{
1139	/* Find range. */
1140	while (pRam && GCPhys > pRam->GCPhysLast)
1141	pRam = CTXALLSUFF(pRam->pNext);
1142	/* Inside range or not? */
1143	if (pRam && GCPhys >= pRam->GCPhys)
1144	{
1145	/*
1146	* Must work our way thru this page by page.
1147	*/
1148	RTGCPHYS off = GCPhys - pRam->GCPhys;
1149	while (off < pRam->cb)
1150	{
1151	unsigned iPage = off >> PAGE_SHIFT;
1152	PPGMPAGE pPage = &pRam->aPages[iPage];
1153	size_t cb;
1154
1155	/* Physical chunk in dynamically allocated range not present? */
1156	if (RT_UNLIKELY(!PGM_PAGE_GET_HCPHYS(pPage)))
1157	{
1158	/* Treat it as reserved; return zeros */
1159	cb = PAGE_SIZE - (off & PAGE_OFFSET_MASK);
1160	if (cb >= cbRead)
1161	{
1162	memset(pvBuf, 0, cbRead);
1163	goto end;
1164	}
1165	memset(pvBuf, 0, cb);
1166	}
1167	/* temp hacks, will be reorganized. */
1168	/*
1169	* Physical handler.
1170	*/
1171	else if ( RT_UNLIKELY(PGM_PAGE_GET_HNDL_PHYS_STATE(pPage) >= PGM_PAGE_HNDL_PHYS_STATE_ALL)
1172	&& !(pPage->HCPhys & MM_RAM_FLAGS_MMIO)) /// @todo PAGE FLAGS
1173	{
1174	int rc = VINF_PGM_HANDLER_DO_DEFAULT;
1175	cb = PAGE_SIZE - (off & PAGE_OFFSET_MASK);
1176
1177	#ifdef IN_RING3 /** @todo deal with this in GC and R0! */
1178	/* find and call the handler */
1179	PPGMPHYSHANDLER pNode = (PPGMPHYSHANDLER)RTAvlroGCPhysRangeGet(&pVM->pgm.s.pTreesHC->PhysHandlers, GCPhys);
1180	if (pNode && pNode->pfnHandlerR3)
1181	{
1182	size_t cbRange = pNode->Core.KeyLast - GCPhys + 1;
1183	if (cbRange < cb)
1184	cb = cbRange;
1185	if (cb > cbRead)
1186	cb = cbRead;
1187
1188	void *pvSrc = PGMRAMRANGE_GETHCPTR(pRam, off)
1189
1190	/** @note Dangerous assumption that HC handlers don't do anything that really requires an EMT lock! */
1191	rc = pNode->pfnHandlerR3(pVM, GCPhys, pvSrc, pvBuf, cb, PGMACCESSTYPE_READ, pNode->pvUserR3);
1192	}
1193	#endif /* IN_RING3 */
1194	if (rc == VINF_PGM_HANDLER_DO_DEFAULT)
1195	{
1196	#ifdef IN_GC
1197	void *pvSrc = NULL;
1198	PGMGCDynMapHCPage(pVM, PGM_PAGE_GET_HCPHYS(pPage), &pvSrc);
1199	pvSrc = (char *)pvSrc + (off & PAGE_OFFSET_MASK);
1200	#else
1201	void *pvSrc = PGMRAMRANGE_GETHCPTR(pRam, off)
1202	#endif
1203
1204	if (cb >= cbRead)
1205	{
1206	memcpy(pvBuf, pvSrc, cbRead);
1207	goto end;
1208	}
1209	memcpy(pvBuf, pvSrc, cb);
1210	}
1211	else if (cb >= cbRead)
1212	goto end;
1213	}
1214	/*
1215	* Virtual handlers.
1216	*/
1217	else if ( RT_UNLIKELY(PGM_PAGE_GET_HNDL_VIRT_STATE(pPage) >= PGM_PAGE_HNDL_VIRT_STATE_ALL)
1218	&& !(pPage->HCPhys & MM_RAM_FLAGS_MMIO)) /// @todo PAGE FLAGS
1219	{
1220	int rc = VINF_PGM_HANDLER_DO_DEFAULT;
1221	cb = PAGE_SIZE - (off & PAGE_OFFSET_MASK);
1222	#ifdef IN_RING3 /** @todo deal with this in GC and R0! */
1223	/* Search the whole tree for matching physical addresses (rather expensive!) */
1224	PPGMVIRTHANDLER pNode;
1225	unsigned iPage;
1226	int rc2 = pgmHandlerVirtualFindByPhysAddr(pVM, GCPhys, &pNode, &iPage);
1227	if (VBOX_SUCCESS(rc2) && pNode->pfnHandlerHC)
1228	{
1229	size_t cbRange = pNode->Core.KeyLast - GCPhys + 1;
1230	if (cbRange < cb)
1231	cb = cbRange;
1232	if (cb > cbRead)
1233	cb = cbRead;
1234	RTGCUINTPTR GCPtr = ((RTGCUINTPTR)pNode->GCPtr & PAGE_BASE_GC_MASK)
1235	+ (iPage << PAGE_SHIFT) + (off & PAGE_OFFSET_MASK);
1236
1237	void *pvSrc = PGMRAMRANGE_GETHCPTR(pRam, off)
1238
1239	/** @note Dangerous assumption that HC handlers don't do anything that really requires an EMT lock! */
1240	rc = pNode->pfnHandlerHC(pVM, (RTGCPTR)GCPtr, pvSrc, pvBuf, cb, PGMACCESSTYPE_READ, 0);
1241	}
1242	#endif /* IN_RING3 */
1243	if (rc == VINF_PGM_HANDLER_DO_DEFAULT)
1244	{
1245	#ifdef IN_GC
1246	void *pvSrc = NULL;
1247	PGMGCDynMapHCPage(pVM, PGM_PAGE_GET_HCPHYS(pPage), &pvSrc);
1248	pvSrc = (char *)pvSrc + (off & PAGE_OFFSET_MASK);
1249	#else
1250	void *pvSrc = PGMRAMRANGE_GETHCPTR(pRam, off)
1251	#endif
1252	if (cb >= cbRead)
1253	{
1254	memcpy(pvBuf, pvSrc, cbRead);
1255	goto end;
1256	}
1257	memcpy(pvBuf, pvSrc, cb);
1258	}
1259	else if (cb >= cbRead)
1260	goto end;
1261	}
1262	else
1263	{
1264	switch (pPage->HCPhys & (MM_RAM_FLAGS_RESERVED \| MM_RAM_FLAGS_MMIO \| MM_RAM_FLAGS_ROM)) /** @todo PAGE FLAGS */
1265	{
1266	/*
1267	* Normal memory or ROM.
1268	*/
1269	case 0:
1270	case MM_RAM_FLAGS_ROM:
1271	case MM_RAM_FLAGS_ROM \| MM_RAM_FLAGS_RESERVED:
1272	//case MM_RAM_FLAGS_ROM \| MM_RAM_FLAGS_MMIO2: /* = shadow */ - //MMIO2 isn't in the mask.
1273	case MM_RAM_FLAGS_MMIO2: // MMIO2 isn't in the mask.
1274	{
1275	#ifdef IN_GC
1276	void *pvSrc = NULL;
1277	PGMGCDynMapHCPage(pVM, PGM_PAGE_GET_HCPHYS(pPage), &pvSrc);
1278	pvSrc = (char *)pvSrc + (off & PAGE_OFFSET_MASK);
1279	#else
1280	void *pvSrc = PGMRAMRANGE_GETHCPTR(pRam, off)
1281	#endif
1282	cb = PAGE_SIZE - (off & PAGE_OFFSET_MASK);
1283	if (cb >= cbRead)
1284	{
1285	#if defined(IN_RING3) && defined(PGM_PHYSMEMACCESS_CACHING)
1286	if (cbRead <= 4 && !fGrabbedLock /* i.e. EMT */)
1287	pgmPhysCacheAdd(pVM, &pVM->pgm.s.pgmphysreadcache, GCPhys, (uint8_t*)pvSrc);
1288	#endif /* IN_RING3 && PGM_PHYSMEMACCESS_CACHING */
1289	memcpy(pvBuf, pvSrc, cbRead);
1290	goto end;
1291	}
1292	memcpy(pvBuf, pvSrc, cb);
1293	break;
1294	}
1295
1296	/*
1297	* All reserved, nothing there.
1298	*/
1299	case MM_RAM_FLAGS_RESERVED:
1300	cb = PAGE_SIZE - (off & PAGE_OFFSET_MASK);
1301	if (cb >= cbRead)
1302	{
1303	memset(pvBuf, 0, cbRead);
1304	goto end;
1305	}
1306	memset(pvBuf, 0, cb);
1307	break;
1308
1309	/*
1310	* The rest needs to be taken more carefully.
1311	*/
1312	default:
1313	#if 1 /** @todo r=bird: Can you do this properly please. */
1314	/** @todo Try MMIO; quick hack */
1315	if (cbRead <= 4 && IOMMMIORead(pVM, GCPhys, (uint32_t *)pvBuf, cbRead) == VINF_SUCCESS)
1316	goto end;
1317	#endif
1318
1319	/** @todo fix me later. */
1320	AssertReleaseMsgFailed(("Unknown read at %VGp size %d implement the complex physical reading case %x\n",
1321	GCPhys, cbRead,
1322	pPage->HCPhys & (MM_RAM_FLAGS_RESERVED \| MM_RAM_FLAGS_MMIO \| MM_RAM_FLAGS_ROM))); /** @todo PAGE FLAGS */
1323	cb = PAGE_SIZE - (off & PAGE_OFFSET_MASK);
1324	break;
1325	}
1326	}
1327	cbRead -= cb;
1328	off += cb;
1329	pvBuf = (char *)pvBuf + cb;
1330	}
1331
1332	GCPhys = pRam->GCPhysLast + 1;
1333	}
1334	else
1335	{
1336	LogFlow(("PGMPhysRead: Unassigned %VGp size=%d\n", GCPhys, cbRead));
1337
1338	/*
1339	* Unassigned address space.
1340	*/
1341	size_t cb;
1342	if ( !pRam
1343	\|\| (cb = pRam->GCPhys - GCPhys) >= cbRead)
1344	{
1345	memset(pvBuf, 0, cbRead);
1346	goto end;
1347	}
1348
1349	memset(pvBuf, 0, cb);
1350	cbRead -= cb;
1351	pvBuf = (char *)pvBuf + cb;
1352	GCPhys += cb;
1353	}
1354	}
1355	end:
1356	#ifdef IN_RING3
1357	if (fGrabbedLock)
1358	pgmUnlock(pVM);
1359	#endif
1360	return;
1361	}
1362
1363	/**
1364	* Write to physical memory.
1365	*
1366	* This API respects access handlers and MMIO. Use PGMPhysReadGCPhys() if you
1367	* want to ignore those.
1368	*
1369	* @param pVM VM Handle.
1370	* @param GCPhys Physical address to write to.
1371	* @param pvBuf What to write.
1372	* @param cbWrite How many bytes to write.
1373	*/
1374	PGMDECL(void) PGMPhysWrite(PVM pVM, RTGCPHYS GCPhys, const void *pvBuf, size_t cbWrite)
1375	{
1376	#ifdef IN_RING3
1377	bool fGrabbedLock = false;
1378	#endif
1379
1380	AssertMsg(!pVM->pgm.s.fNoMorePhysWrites, ("Calling PGMPhysWrite after pgmR3Save()!\n"));
1381	AssertMsg(cbWrite > 0, ("don't even think about writing zero bytes!\n"));
1382	if (cbWrite == 0)
1383	return;
1384
1385	LogFlow(("PGMPhysWrite: %VGp %d\n", GCPhys, cbWrite));
1386
1387	#ifdef IN_RING3
1388	if (!VM_IS_EMT(pVM))
1389	{
1390	pgmLock(pVM);
1391	fGrabbedLock = true;
1392	}
1393	#endif
1394	/*
1395	* Copy loop on ram ranges.
1396	*/
1397	PPGMRAMRANGE pRam = CTXALLSUFF(pVM->pgm.s.pRamRanges);
1398	for (;;)
1399	{
1400	/* Find range. */
1401	while (pRam && GCPhys > pRam->GCPhysLast)
1402	pRam = CTXALLSUFF(pRam->pNext);
1403	/* Inside range or not? */
1404	if (pRam && GCPhys >= pRam->GCPhys)
1405	{
1406	/*
1407	* Must work our way thru this page by page.
1408	*/
1409	unsigned off = GCPhys - pRam->GCPhys;
1410	while (off < pRam->cb)
1411	{
1412	unsigned iPage = off >> PAGE_SHIFT;
1413	PPGMPAGE pPage = &pRam->aPages[iPage];
1414
1415	/* Physical chunk in dynamically allocated range not present? */
1416	if (RT_UNLIKELY(!PGM_PAGE_GET_HCPHYS(pPage)))
1417	{
1418	int rc;
1419	#ifdef IN_RING3
1420	if (fGrabbedLock)
1421	{
1422	pgmUnlock(pVM);
1423	rc = pgmr3PhysGrowRange(pVM, GCPhys);
1424	if (rc == VINF_SUCCESS)
1425	PGMPhysWrite(pVM, GCPhys, pvBuf, cbWrite); /* try again; can't assume pRam is still valid (paranoia) */
1426	return;
1427	}
1428	rc = pgmr3PhysGrowRange(pVM, GCPhys);
1429	#else
1430	rc = CTXALLMID(VMM, CallHost)(pVM, VMMCALLHOST_PGM_RAM_GROW_RANGE, GCPhys);
1431	#endif
1432	if (rc != VINF_SUCCESS)
1433	goto end;
1434	}
1435
1436	size_t cb;
1437	/* temporary hack, will reogranize is later. */
1438	/*
1439	* Virtual handlers
1440	*/
1441	if ( PGM_PAGE_HAS_ACTIVE_VIRTUAL_HANDLERS(pPage)
1442	&& !(pPage->HCPhys & MM_RAM_FLAGS_MMIO)) /// @todo PAGE FLAGS
1443	{
1444	if (PGM_PAGE_HAS_ACTIVE_PHYSICAL_HANDLERS(pPage))
1445	{
1446	/*
1447	* Physical write handler + virtual write handler.
1448	* Consider this a quick workaround for the CSAM + shadow caching problem.
1449	*
1450	* We hand it to the shadow caching first since it requires the unchanged
1451	* data. CSAM will have to put up with it already being changed.
1452	*/
1453	int rc = VINF_PGM_HANDLER_DO_DEFAULT;
1454	cb = PAGE_SIZE - (off & PAGE_OFFSET_MASK);
1455	#ifdef IN_RING3 /** @todo deal with this in GC and R0! */
1456	/* 1. The physical handler */
1457	PPGMPHYSHANDLER pPhysNode = (PPGMPHYSHANDLER)RTAvlroGCPhysRangeGet(&pVM->pgm.s.pTreesHC->PhysHandlers, GCPhys);
1458	if (pPhysNode && pPhysNode->pfnHandlerR3)
1459	{
1460	size_t cbRange = pPhysNode->Core.KeyLast - GCPhys + 1;
1461	if (cbRange < cb)
1462	cb = cbRange;
1463	if (cb > cbWrite)
1464	cb = cbWrite;
1465
1466	void *pvDst = PGMRAMRANGE_GETHCPTR(pRam, off)
1467
1468	/** @note Dangerous assumption that HC handlers don't do anything that really requires an EMT lock! */
1469	rc = pPhysNode->pfnHandlerR3(pVM, GCPhys, pvDst, (void *)pvBuf, cb, PGMACCESSTYPE_WRITE, pPhysNode->pvUserR3);
1470	}
1471
1472	/* 2. The virtual handler (will see incorrect data) */
1473	PPGMVIRTHANDLER pVirtNode;
1474	unsigned iPage;
1475	int rc2 = pgmHandlerVirtualFindByPhysAddr(pVM, GCPhys, &pVirtNode, &iPage);
1476	if (VBOX_SUCCESS(rc2) && pVirtNode->pfnHandlerHC)
1477	{
1478	size_t cbRange = pVirtNode->Core.KeyLast - GCPhys + 1;
1479	if (cbRange < cb)
1480	cb = cbRange;
1481	if (cb > cbWrite)
1482	cb = cbWrite;
1483	RTGCUINTPTR GCPtr = ((RTGCUINTPTR)pVirtNode->GCPtr & PAGE_BASE_GC_MASK)
1484	+ (iPage << PAGE_SHIFT) + (off & PAGE_OFFSET_MASK);
1485
1486	void *pvDst = PGMRAMRANGE_GETHCPTR(pRam, off)
1487
1488	/** @note Dangerous assumption that HC handlers don't do anything that really requires an EMT lock! */
1489	rc2 = pVirtNode->pfnHandlerHC(pVM, (RTGCPTR)GCPtr, pvDst, (void *)pvBuf, cb, PGMACCESSTYPE_WRITE, 0);
1490	if ( ( rc2 != VINF_PGM_HANDLER_DO_DEFAULT
1491	&& rc == VINF_PGM_HANDLER_DO_DEFAULT)
1492	\|\| ( VBOX_FAILURE(rc2)
1493	&& VBOX_SUCCESS(rc)))
1494	rc = rc2;
1495	}
1496	#endif /* IN_RING3 */
1497	if (rc == VINF_PGM_HANDLER_DO_DEFAULT)
1498	{
1499	#ifdef IN_GC
1500	void *pvDst = NULL;
1501	PGMGCDynMapHCPage(pVM, PGM_PAGE_GET_HCPHYS(pPage), &pvDst);
1502	pvDst = (char *)pvDst + (off & PAGE_OFFSET_MASK);
1503	#else
1504	void *pvDst = PGMRAMRANGE_GETHCPTR(pRam, off)
1505	#endif
1506	if (cb >= cbWrite)
1507	{
1508	memcpy(pvDst, pvBuf, cbWrite);
1509	goto end;
1510	}
1511	memcpy(pvDst, pvBuf, cb);
1512	}
1513	else if (cb >= cbWrite)
1514	goto end;
1515	}
1516	else
1517	{
1518	int rc = VINF_PGM_HANDLER_DO_DEFAULT;
1519	cb = PAGE_SIZE - (off & PAGE_OFFSET_MASK);
1520	#ifdef IN_RING3
1521	/** @todo deal with this in GC and R0! */
1522	/* Search the whole tree for matching physical addresses (rather expensive!) */
1523	PPGMVIRTHANDLER pNode;
1524	unsigned iPage;
1525	int rc2 = pgmHandlerVirtualFindByPhysAddr(pVM, GCPhys, &pNode, &iPage);
1526	if (VBOX_SUCCESS(rc2) && pNode->pfnHandlerHC)
1527	{
1528	size_t cbRange = pNode->Core.KeyLast - GCPhys + 1;
1529	if (cbRange < cb)
1530	cb = cbRange;
1531	if (cb > cbWrite)
1532	cb = cbWrite;
1533	RTGCUINTPTR GCPtr = ((RTGCUINTPTR)pNode->GCPtr & PAGE_BASE_GC_MASK)
1534	+ (iPage << PAGE_SHIFT) + (off & PAGE_OFFSET_MASK);
1535
1536	void *pvDst = PGMRAMRANGE_GETHCPTR(pRam, off)
1537
1538	/** @tode Dangerous assumption that HC handlers don't do anything that really requires an EMT lock! */
1539	rc = pNode->pfnHandlerHC(pVM, (RTGCPTR)GCPtr, pvDst, (void *)pvBuf, cb, PGMACCESSTYPE_WRITE, 0);
1540	}
1541	#endif /* IN_RING3 */
1542	if (rc == VINF_PGM_HANDLER_DO_DEFAULT)
1543	{
1544	#ifdef IN_GC
1545	void *pvDst = NULL;
1546	PGMGCDynMapHCPage(pVM, PGM_PAGE_GET_HCPHYS(pPage), &pvDst);
1547	pvDst = (char *)pvDst + (off & PAGE_OFFSET_MASK);
1548	#else
1549	void *pvDst = PGMRAMRANGE_GETHCPTR(pRam, off)
1550	#endif
1551	if (cb >= cbWrite)
1552	{
1553	memcpy(pvDst, pvBuf, cbWrite);
1554	goto end;
1555	}
1556	memcpy(pvDst, pvBuf, cb);
1557	}
1558	else if (cb >= cbWrite)
1559	goto end;
1560	}
1561	}
1562	/*
1563	* Physical handler.
1564	*/
1565	else if ( RT_UNLIKELY(PGM_PAGE_GET_HNDL_PHYS_STATE(pPage) >= PGM_PAGE_HNDL_PHYS_STATE_WRITE)
1566	&& !(pPage->HCPhys & MM_RAM_FLAGS_MMIO)) /// @todo PAGE FLAGS
1567	{
1568	int rc = VINF_PGM_HANDLER_DO_DEFAULT;
1569	cb = PAGE_SIZE - (off & PAGE_OFFSET_MASK);
1570	#ifdef IN_RING3 /** @todo deal with this in GC and R0! */
1571	/* find and call the handler */
1572	PPGMPHYSHANDLER pNode = (PPGMPHYSHANDLER)RTAvlroGCPhysRangeGet(&pVM->pgm.s.pTreesHC->PhysHandlers, GCPhys);
1573	if (pNode && pNode->pfnHandlerR3)
1574	{
1575	size_t cbRange = pNode->Core.KeyLast - GCPhys + 1;
1576	if (cbRange < cb)
1577	cb = cbRange;
1578	if (cb > cbWrite)
1579	cb = cbWrite;
1580
1581	void *pvDst = PGMRAMRANGE_GETHCPTR(pRam, off)
1582
1583	/** @todo Dangerous assumption that HC handlers don't do anything that really requires an EMT lock! */
1584	rc = pNode->pfnHandlerR3(pVM, GCPhys, pvDst, (void *)pvBuf, cb, PGMACCESSTYPE_WRITE, pNode->pvUserR3);
1585	}
1586	#endif /* IN_RING3 */
1587	if (rc == VINF_PGM_HANDLER_DO_DEFAULT)
1588	{
1589	#ifdef IN_GC
1590	void *pvDst = NULL;
1591	PGMGCDynMapHCPage(pVM, PGM_PAGE_GET_HCPHYS(pPage), &pvDst);
1592	pvDst = (char *)pvDst + (off & PAGE_OFFSET_MASK);
1593	#else
1594	void *pvDst = PGMRAMRANGE_GETHCPTR(pRam, off)
1595	#endif
1596	if (cb >= cbWrite)
1597	{
1598	memcpy(pvDst, pvBuf, cbWrite);
1599	goto end;
1600	}
1601	memcpy(pvDst, pvBuf, cb);
1602	}
1603	else if (cb >= cbWrite)
1604	goto end;
1605	}
1606	else
1607	{
1608	/** @todo r=bird: missing MM_RAM_FLAGS_ROM here, we shall not allow anyone to overwrite the ROM! */
1609	switch (pPage->HCPhys & (MM_RAM_FLAGS_RESERVED \| MM_RAM_FLAGS_MMIO \| MM_RAM_FLAGS_MMIO2)) /** @todo PAGE FLAGS */
1610	{
1611	/*
1612	* Normal memory, MMIO2 or writable shadow ROM.
1613	*/
1614	case 0:
1615	case MM_RAM_FLAGS_MMIO2:
1616	case MM_RAM_FLAGS_ROM \| MM_RAM_FLAGS_MMIO2: /* shadow rom */
1617	{
1618	#ifdef IN_GC
1619	void *pvDst = NULL;
1620	PGMGCDynMapHCPage(pVM, PGM_PAGE_GET_HCPHYS(pPage), &pvDst);
1621	pvDst = (char *)pvDst + (off & PAGE_OFFSET_MASK);
1622	#else
1623	void *pvDst = PGMRAMRANGE_GETHCPTR(pRam, off)
1624	#endif
1625	cb = PAGE_SIZE - (off & PAGE_OFFSET_MASK);
1626	if (cb >= cbWrite)
1627	{
1628	#if defined(IN_RING3) && defined(PGM_PHYSMEMACCESS_CACHING)
1629	if (cbWrite <= 4 && !fGrabbedLock /* i.e. EMT */)
1630	pgmPhysCacheAdd(pVM, &pVM->pgm.s.pgmphyswritecache, GCPhys, (uint8_t*)pvDst);
1631	#endif /* IN_RING3 && PGM_PHYSMEMACCESS_CACHING */
1632	memcpy(pvDst, pvBuf, cbWrite);
1633	goto end;
1634	}
1635	memcpy(pvDst, pvBuf, cb);
1636	break;
1637	}
1638
1639	/*
1640	* All reserved, nothing there.
1641	*/
1642	case MM_RAM_FLAGS_RESERVED:
1643	case MM_RAM_FLAGS_RESERVED \| MM_RAM_FLAGS_MMIO2:
1644	cb = PAGE_SIZE - (off & PAGE_OFFSET_MASK);
1645	if (cb >= cbWrite)
1646	goto end;
1647	break;
1648
1649
1650	/*
1651	* The rest needs to be taken more carefully.
1652	*/
1653	default:
1654	#if 1 /** @todo r=bird: Can you do this properly please. */
1655	/** @todo Try MMIO; quick hack */
1656	if (cbWrite <= 4 && IOMMMIOWrite(pVM, GCPhys, (uint32_t )pvBuf, cbWrite) == VINF_SUCCESS)
1657	goto end;
1658	#endif
1659
1660	/** @todo fix me later. */
1661	AssertReleaseMsgFailed(("Unknown write at %VGp size %d implement the complex physical writing case %x\n",
1662	GCPhys, cbWrite,
1663	(pPage->HCPhys & (MM_RAM_FLAGS_RESERVED \| MM_RAM_FLAGS_MMIO \| MM_RAM_FLAGS_MMIO2)))); /** @todo PAGE FLAGS */
1664	/* skip the write */
1665	cb = cbWrite;
1666	break;
1667	}
1668	}
1669
1670	cbWrite -= cb;
1671	off += cb;
1672	pvBuf = (const char *)pvBuf + cb;
1673	}
1674
1675	GCPhys = pRam->GCPhysLast + 1;
1676	}
1677	else
1678	{
1679	/*
1680	* Unassigned address space.
1681	*/
1682	size_t cb;
1683	if ( !pRam
1684	\|\| (cb = pRam->GCPhys - GCPhys) >= cbWrite)
1685	goto end;
1686
1687	cbWrite -= cb;
1688	pvBuf = (const char *)pvBuf + cb;
1689	GCPhys += cb;
1690	}
1691	}
1692	end:
1693	#ifdef IN_RING3
1694	if (fGrabbedLock)
1695	pgmUnlock(pVM);
1696	#endif
1697	return;
1698	}
1699
1700	#ifndef IN_GC /* Ring 0 & 3 only */
1701
1702	/**
1703	* Read from guest physical memory by GC physical address, bypassing
1704	* MMIO and access handlers.
1705	*
1706	* @returns VBox status.
1707	* @param pVM VM handle.
1708	* @param pvDst The destination address.
1709	* @param GCPhysSrc The source address (GC physical address).
1710	* @param cb The number of bytes to read.
1711	*/
1712	PGMDECL(int) PGMPhysReadGCPhys(PVM pVM, void *pvDst, RTGCPHYS GCPhysSrc, size_t cb)
1713	{
1714	/*
1715	* Anything to be done?
1716	*/
1717	if (!cb)
1718	return VINF_SUCCESS;
1719
1720	/*
1721	* Loop ram ranges.
1722	*/
1723	for (PPGMRAMRANGE pRam = CTXALLSUFF(pVM->pgm.s.pRamRanges);
1724	pRam;
1725	pRam = CTXALLSUFF(pRam->pNext))
1726	{
1727	RTGCPHYS off = GCPhysSrc - pRam->GCPhys;
1728	if (off < pRam->cb)
1729	{
1730	if (pRam->fFlags & MM_RAM_FLAGS_DYNAMIC_ALLOC)
1731	{
1732	/* Copy page by page as we're not dealing with a linear HC range. */
1733	for (;;)
1734	{
1735	/* convert */
1736	void *pvSrc;
1737	int rc = pgmRamGCPhys2HCPtrWithRange(pVM, pRam, GCPhysSrc, &pvSrc);
1738	if (VBOX_FAILURE(rc))
1739	return rc;
1740
1741	/* copy */
1742	size_t cbRead = PAGE_SIZE - ((RTGCUINTPTR)GCPhysSrc & PAGE_OFFSET_MASK);
1743	if (cbRead >= cb)
1744	{
1745	memcpy(pvDst, pvSrc, cb);
1746	return VINF_SUCCESS;
1747	}
1748	memcpy(pvDst, pvSrc, cbRead);
1749
1750	/* next */
1751	cb -= cbRead;
1752	pvDst = (uint8_t *)pvDst + cbRead;
1753	GCPhysSrc += cbRead;
1754	}
1755	}
1756	else if (pRam->pvHC)
1757	{
1758	/* read */
1759	size_t cbRead = pRam->cb - off;
1760	if (cbRead >= cb)
1761	{
1762	memcpy(pvDst, (uint8_t *)pRam->pvHC + off, cb);
1763	return VINF_SUCCESS;
1764	}
1765	memcpy(pvDst, (uint8_t *)pRam->pvHC + off, cbRead);
1766
1767	/* next */
1768	cb -= cbRead;
1769	pvDst = (uint8_t *)pvDst + cbRead;
1770	GCPhysSrc += cbRead;
1771	}
1772	else
1773	return VERR_PGM_PHYS_PAGE_RESERVED;
1774	}
1775	else if (GCPhysSrc < pRam->GCPhysLast)
1776	break;
1777	}
1778	return VERR_PGM_INVALID_GC_PHYSICAL_ADDRESS;
1779	}
1780
1781
1782	/**
1783	* Write to guest physical memory referenced by GC pointer.
1784	* Write memory to GC physical address in guest physical memory.
1785	*
1786	* This will bypass MMIO and access handlers.
1787	*
1788	* @returns VBox status.
1789	* @param pVM VM handle.
1790	* @param GCPhysDst The GC physical address of the destination.
1791	* @param pvSrc The source buffer.
1792	* @param cb The number of bytes to write.
1793	*/
1794	PGMDECL(int) PGMPhysWriteGCPhys(PVM pVM, RTGCPHYS GCPhysDst, const void *pvSrc, size_t cb)
1795	{
1796	/*
1797	* Anything to be done?
1798	*/
1799	if (!cb)
1800	return VINF_SUCCESS;
1801
1802	LogFlow(("PGMPhysWriteGCPhys: %VGp %d\n", GCPhysDst, cb));
1803
1804	/*
1805	* Loop ram ranges.
1806	*/
1807	for (PPGMRAMRANGE pRam = CTXALLSUFF(pVM->pgm.s.pRamRanges);
1808	pRam;
1809	pRam = CTXALLSUFF(pRam->pNext))
1810	{
1811	RTGCPHYS off = GCPhysDst - pRam->GCPhys;
1812	if (off < pRam->cb)
1813	{
1814	#ifdef VBOX_WITH_NEW_PHYS_CODE
1815	/** @todo PGMRamGCPhys2HCPtrWithRange. */
1816	#endif
1817	if (pRam->fFlags & MM_RAM_FLAGS_DYNAMIC_ALLOC)
1818	{
1819	/* Copy page by page as we're not dealing with a linear HC range. */
1820	for (;;)
1821	{
1822	/* convert */
1823	void *pvDst;
1824	int rc = pgmRamGCPhys2HCPtrWithRange(pVM, pRam, GCPhysDst, &pvDst);
1825	if (VBOX_FAILURE(rc))
1826	return rc;
1827
1828	/* copy */
1829	size_t cbWrite = PAGE_SIZE - ((RTGCUINTPTR)GCPhysDst & PAGE_OFFSET_MASK);
1830	if (cbWrite >= cb)
1831	{
1832	memcpy(pvDst, pvSrc, cb);
1833	return VINF_SUCCESS;
1834	}
1835	memcpy(pvDst, pvSrc, cbWrite);
1836
1837	/* next */
1838	cb -= cbWrite;
1839	pvSrc = (uint8_t *)pvSrc + cbWrite;
1840	GCPhysDst += cbWrite;
1841	}
1842	}
1843	else if (pRam->pvHC)
1844	{
1845	/* write */
1846	size_t cbWrite = pRam->cb - off;
1847	if (cbWrite >= cb)
1848	{
1849	memcpy((uint8_t *)pRam->pvHC + off, pvSrc, cb);
1850	return VINF_SUCCESS;
1851	}
1852	memcpy((uint8_t *)pRam->pvHC + off, pvSrc, cbWrite);
1853
1854	/* next */
1855	cb -= cbWrite;
1856	GCPhysDst += cbWrite;
1857	pvSrc = (uint8_t *)pvSrc + cbWrite;
1858	}
1859	else
1860	return VERR_PGM_PHYS_PAGE_RESERVED;
1861	}
1862	else if (GCPhysDst < pRam->GCPhysLast)
1863	break;
1864	}
1865	return VERR_PGM_INVALID_GC_PHYSICAL_ADDRESS;
1866	}
1867
1868
1869	/**
1870	* Read from guest physical memory referenced by GC pointer.
1871	*
1872	* This function uses the current CR3/CR0/CR4 of the guest and will
1873	* bypass access handlers and not set any accessed bits.
1874	*
1875	* @returns VBox status.
1876	* @param pVM VM handle.
1877	* @param pvDst The destination address.
1878	* @param GCPtrSrc The source address (GC pointer).
1879	* @param cb The number of bytes to read.
1880	*/
1881	PGMDECL(int) PGMPhysReadGCPtr(PVM pVM, void *pvDst, RTGCPTR GCPtrSrc, size_t cb)
1882	{
1883	/*
1884	* Anything to do?
1885	*/
1886	if (!cb)
1887	return VINF_SUCCESS;
1888
1889	/*
1890	* Optimize reads within a single page.
1891	*/
1892	if (((RTGCUINTPTR)GCPtrSrc & PAGE_OFFSET_MASK) + cb <= PAGE_SIZE)
1893	{
1894	void *pvSrc;
1895	int rc = PGMPhysGCPtr2HCPtr(pVM, GCPtrSrc, &pvSrc);
1896	if (VBOX_FAILURE(rc))
1897	return rc;
1898	memcpy(pvDst, pvSrc, cb);
1899	return VINF_SUCCESS;
1900	}
1901
1902	/*
1903	* Page by page.
1904	*/
1905	for (;;)
1906	{
1907	/* convert */
1908	void *pvSrc;
1909	int rc = PGMPhysGCPtr2HCPtr(pVM, GCPtrSrc, &pvSrc);
1910	if (VBOX_FAILURE(rc))
1911	return rc;
1912
1913	/* copy */
1914	size_t cbRead = PAGE_SIZE - ((RTGCUINTPTR)GCPtrSrc & PAGE_OFFSET_MASK);
1915	if (cbRead >= cb)
1916	{
1917	memcpy(pvDst, pvSrc, cb);
1918	return VINF_SUCCESS;
1919	}
1920	memcpy(pvDst, pvSrc, cbRead);
1921
1922	/* next */
1923	cb -= cbRead;
1924	pvDst = (uint8_t *)pvDst + cbRead;
1925	GCPtrSrc += cbRead;
1926	}
1927	}
1928
1929
1930	/**
1931	* Write to guest physical memory referenced by GC pointer.
1932	*
1933	* This function uses the current CR3/CR0/CR4 of the guest and will
1934	* bypass access handlers and not set dirty or accessed bits.
1935	*
1936	* @returns VBox status.
1937	* @param pVM VM handle.
1938	* @param GCPtrDst The destination address (GC pointer).
1939	* @param pvSrc The source address.
1940	* @param cb The number of bytes to write.
1941	*/
1942	PGMDECL(int) PGMPhysWriteGCPtr(PVM pVM, RTGCPTR GCPtrDst, const void *pvSrc, size_t cb)
1943	{
1944	/*
1945	* Anything to do?
1946	*/
1947	if (!cb)
1948	return VINF_SUCCESS;
1949
1950	LogFlow(("PGMPhysWriteGCPtr: %VGv %d\n", GCPtrDst, cb));
1951
1952	/*
1953	* Optimize writes within a single page.
1954	*/
1955	if (((RTGCUINTPTR)GCPtrDst & PAGE_OFFSET_MASK) + cb <= PAGE_SIZE)
1956	{
1957	void *pvDst;
1958	int rc = PGMPhysGCPtr2HCPtr(pVM, GCPtrDst, &pvDst);
1959	if (VBOX_FAILURE(rc))
1960	return rc;
1961	memcpy(pvDst, pvSrc, cb);
1962	return VINF_SUCCESS;
1963	}
1964
1965	/*
1966	* Page by page.
1967	*/
1968	for (;;)
1969	{
1970	/* convert */
1971	void *pvDst;
1972	int rc = PGMPhysGCPtr2HCPtr(pVM, GCPtrDst, &pvDst);
1973	if (VBOX_FAILURE(rc))
1974	return rc;
1975
1976	/* copy */
1977	size_t cbWrite = PAGE_SIZE - ((RTGCUINTPTR)GCPtrDst & PAGE_OFFSET_MASK);
1978	if (cbWrite >= cb)
1979	{
1980	memcpy(pvDst, pvSrc, cb);
1981	return VINF_SUCCESS;
1982	}
1983	memcpy(pvDst, pvSrc, cbWrite);
1984
1985	/* next */
1986	cb -= cbWrite;
1987	pvSrc = (uint8_t *)pvSrc + cbWrite;
1988	GCPtrDst += cbWrite;
1989	}
1990	}
1991
1992	/**
1993	* Read from guest physical memory referenced by GC pointer.
1994	*
1995	* This function uses the current CR3/CR0/CR4 of the guest and will
1996	* respect access handlers and set accessed bits.
1997	*
1998	* @returns VBox status.
1999	* @param pVM VM handle.
2000	* @param pvDst The destination address.
2001	* @param GCPtrSrc The source address (GC pointer).
2002	* @param cb The number of bytes to read.
2003	*/
2004	/** @todo use the PGMPhysReadGCPtr name and rename the unsafe one to something appropriate */
2005	PGMDECL(int) PGMPhysReadGCPtrSafe(PVM pVM, void *pvDst, RTGCPTR GCPtrSrc, size_t cb)
2006	{
2007	RTGCPHYS GCPhys;
2008	int rc;
2009
2010	/*
2011	* Anything to do?
2012	*/
2013	if (!cb)
2014	return VINF_SUCCESS;
2015
2016	LogFlow(("PGMPhysReadGCPtrSafe: %VGv %d\n", GCPtrSrc, cb));
2017
2018	/*
2019	* Optimize reads within a single page.
2020	*/
2021	if (((RTGCUINTPTR)GCPtrSrc & PAGE_OFFSET_MASK) + cb <= PAGE_SIZE)
2022	{
2023	/* Convert virtual to physical address */
2024	rc = PGMPhysGCPtr2GCPhys(pVM, GCPtrSrc, &GCPhys);
2025	AssertRCReturn(rc, rc);
2026
2027	/* mark the guest page as accessed. */
2028	rc = PGMGstModifyPage(pVM, GCPtrSrc, 1, X86_PTE_A, ~(uint64_t)(X86_PTE_A));
2029	AssertRC(rc);
2030
2031	PGMPhysRead(pVM, GCPhys, pvDst, cb);
2032	return VINF_SUCCESS;
2033	}
2034
2035	/*
2036	* Page by page.
2037	*/
2038	for (;;)
2039	{
2040	/* Convert virtual to physical address */
2041	rc = PGMPhysGCPtr2GCPhys(pVM, GCPtrSrc, &GCPhys);
2042	AssertRCReturn(rc, rc);
2043
2044	/* mark the guest page as accessed. */
2045	int rc = PGMGstModifyPage(pVM, GCPtrSrc, 1, X86_PTE_A, ~(uint64_t)(X86_PTE_A));
2046	AssertRC(rc);
2047
2048	/* copy */
2049	size_t cbRead = PAGE_SIZE - ((RTGCUINTPTR)GCPtrSrc & PAGE_OFFSET_MASK);
2050	if (cbRead >= cb)
2051	{
2052	PGMPhysRead(pVM, GCPhys, pvDst, cb);
2053	return VINF_SUCCESS;
2054	}
2055	PGMPhysRead(pVM, GCPhys, pvDst, cbRead);
2056
2057	/* next */
2058	cb -= cbRead;
2059	pvDst = (uint8_t *)pvDst + cbRead;
2060	GCPtrSrc += cbRead;
2061	}
2062	}
2063
2064
2065	/**
2066	* Write to guest physical memory referenced by GC pointer.
2067	*
2068	* This function uses the current CR3/CR0/CR4 of the guest and will
2069	* respect access handlers and set dirty and accessed bits.
2070	*
2071	* @returns VBox status.
2072	* @param pVM VM handle.
2073	* @param GCPtrDst The destination address (GC pointer).
2074	* @param pvSrc The source address.
2075	* @param cb The number of bytes to write.
2076	*/
2077	/** @todo use the PGMPhysWriteGCPtr name and rename the unsafe one to something appropriate */
2078	PGMDECL(int) PGMPhysWriteGCPtrSafe(PVM pVM, RTGCPTR GCPtrDst, const void *pvSrc, size_t cb)
2079	{
2080	RTGCPHYS GCPhys;
2081	int rc;
2082
2083	/*
2084	* Anything to do?
2085	*/
2086	if (!cb)
2087	return VINF_SUCCESS;
2088
2089	LogFlow(("PGMPhysWriteGCPtrSafe: %VGv %d\n", GCPtrDst, cb));
2090
2091	/*
2092	* Optimize writes within a single page.
2093	*/
2094	if (((RTGCUINTPTR)GCPtrDst & PAGE_OFFSET_MASK) + cb <= PAGE_SIZE)
2095	{
2096	/* Convert virtual to physical address */
2097	rc = PGMPhysGCPtr2GCPhys(pVM, GCPtrDst, &GCPhys);
2098	AssertRCReturn(rc, rc);
2099
2100	/* mark the guest page as accessed and dirty. */
2101	rc = PGMGstModifyPage(pVM, GCPtrDst, 1, X86_PTE_A \| X86_PTE_D, ~(uint64_t)(X86_PTE_A \| X86_PTE_D));
2102	AssertRC(rc);
2103
2104	PGMPhysWrite(pVM, GCPhys, pvSrc, cb);
2105	return VINF_SUCCESS;
2106	}
2107
2108	/*
2109	* Page by page.
2110	*/
2111	for (;;)
2112	{
2113	/* Convert virtual to physical address */
2114	rc = PGMPhysGCPtr2GCPhys(pVM, GCPtrDst, &GCPhys);
2115	AssertRCReturn(rc, rc);
2116
2117	/* mark the guest page as accessed and dirty. */
2118	rc = PGMGstModifyPage(pVM, GCPtrDst, 1, X86_PTE_A \| X86_PTE_D, ~(uint64_t)(X86_PTE_A \| X86_PTE_D));
2119	AssertRC(rc);
2120
2121	/* copy */
2122	size_t cbWrite = PAGE_SIZE - ((RTGCUINTPTR)GCPtrDst & PAGE_OFFSET_MASK);
2123	if (cbWrite >= cb)
2124	{
2125	PGMPhysWrite(pVM, GCPhys, pvSrc, cb);
2126	return VINF_SUCCESS;
2127	}
2128	PGMPhysWrite(pVM, GCPhys, pvSrc, cbWrite);
2129
2130	/* next */
2131	cb -= cbWrite;
2132	pvSrc = (uint8_t *)pvSrc + cbWrite;
2133	GCPtrDst += cbWrite;
2134	}
2135	}
2136
2137	/**
2138	* Write to guest physical memory referenced by GC pointer and update the PTE.
2139	*
2140	* This function uses the current CR3/CR0/CR4 of the guest and will
2141	* bypass access handlers and set any dirty and accessed bits in the PTE.
2142	*
2143	* If you don't want to set the dirty bit, use PGMPhysWriteGCPtr().
2144	*
2145	* @returns VBox status.
2146	* @param pVM VM handle.
2147	* @param GCPtrDst The destination address (GC pointer).
2148	* @param pvSrc The source address.
2149	* @param cb The number of bytes to write.
2150	*/
2151	PGMDECL(int) PGMPhysWriteGCPtrDirty(PVM pVM, RTGCPTR GCPtrDst, const void *pvSrc, size_t cb)
2152	{
2153	/*
2154	* Anything to do?
2155	*/
2156	if (!cb)
2157	return VINF_SUCCESS;
2158
2159	/*
2160	* Optimize writes within a single page.
2161	*/
2162	if (((RTGCUINTPTR)GCPtrDst & PAGE_OFFSET_MASK) + cb <= PAGE_SIZE)
2163	{
2164	void *pvDst;
2165	int rc = PGMPhysGCPtr2HCPtr(pVM, GCPtrDst, &pvDst);
2166	if (VBOX_FAILURE(rc))
2167	return rc;
2168	memcpy(pvDst, pvSrc, cb);
2169	rc = PGMGstModifyPage(pVM, GCPtrDst, cb, X86_PTE_A \| X86_PTE_D, ~(uint64_t)(X86_PTE_A \| X86_PTE_D));
2170	AssertRC(rc);
2171	return VINF_SUCCESS;
2172	}
2173
2174	/*
2175	* Page by page.
2176	*/
2177	for (;;)
2178	{
2179	/* convert */
2180	void *pvDst;
2181	int rc = PGMPhysGCPtr2HCPtr(pVM, GCPtrDst, &pvDst);
2182	if (VBOX_FAILURE(rc))
2183	return rc;
2184
2185	/* mark the guest page as accessed and dirty. */
2186	rc = PGMGstModifyPage(pVM, GCPtrDst, 1, X86_PTE_A \| X86_PTE_D, ~(uint64_t)(X86_PTE_A \| X86_PTE_D));
2187	AssertRC(rc);
2188
2189	/* copy */
2190	size_t cbWrite = PAGE_SIZE - ((RTGCUINTPTR)GCPtrDst & PAGE_OFFSET_MASK);
2191	if (cbWrite >= cb)
2192	{
2193	memcpy(pvDst, pvSrc, cb);
2194	return VINF_SUCCESS;
2195	}
2196	memcpy(pvDst, pvSrc, cbWrite);
2197
2198	/* next */
2199	cb -= cbWrite;
2200	GCPtrDst += cbWrite;
2201	pvSrc = (char *)pvSrc + cbWrite;
2202	}
2203	}
2204
2205	#endif /* !IN_GC */
2206
2207
2208
2209	/**
2210	* Performs a read of guest virtual memory for instruction emulation.
2211	*
2212	* This will check permissions, raise exceptions and update the access bits.
2213	*
2214	* The current implementation will bypass all access handlers. It may later be
2215	* changed to at least respect MMIO.
2216	*
2217	*
2218	* @returns VBox status code suitable to scheduling.
2219	* @retval VINF_SUCCESS if the read was performed successfully.
2220	* @retval VINF_EM_RAW_GUEST_TRAP if an exception was raised but not dispatched yet.
2221	* @retval VINF_TRPM_XCPT_DISPATCHED if an exception was raised and dispatched.
2222	*
2223	* @param pVM The VM handle.
2224	* @param pCtxCore The context core.
2225	* @param pvDst Where to put the bytes we've read.
2226	* @param GCPtrSrc The source address.
2227	* @param cb The number of bytes to read. Not more than a page.
2228	*
2229	* @remark This function will dynamically map physical pages in GC. This may unmap
2230	* mappings done by the caller. Be careful!
2231	*/
2232	PGMDECL(int) PGMPhysInterpretedRead(PVM pVM, PCPUMCTXCORE pCtxCore, void *pvDst, RTGCUINTPTR GCPtrSrc, size_t cb)
2233	{
2234	Assert(cb <= PAGE_SIZE);
2235
2236	/** @todo r=bird: This isn't perfect!
2237	* -# It's not checking for reserved bits being 1.
2238	* -# It's not correctly dealing with the access bit.
2239	* -# It's not respecting MMIO memory or any other access handlers.
2240	*/
2241	/*
2242	* 1. Translate virtual to physical. This may fault.
2243	* 2. Map the physical address.
2244	* 3. Do the read operation.
2245	* 4. Set access bits if required.
2246	*/
2247	int rc;
2248	unsigned cb1 = PAGE_SIZE - (GCPtrSrc & PAGE_OFFSET_MASK);
2249	if (cb <= cb1)
2250	{
2251	/*
2252	* Not crossing pages.
2253	*/
2254	RTGCPHYS GCPhys;
2255	uint64_t fFlags;
2256	rc = PGM_GST_PFN(GetPage,pVM)(pVM, GCPtrSrc, &fFlags, &GCPhys);
2257	if (VBOX_SUCCESS(rc))
2258	{
2259	/** @todo we should check reserved bits ... */
2260	void *pvSrc;
2261	rc = PGM_GCPHYS_2_PTR(pVM, GCPhys, &pvSrc);
2262	switch (rc)
2263	{
2264	case VINF_SUCCESS:
2265	Log(("PGMPhysInterpretedRead: pvDst=%p pvSrc=%p cb=%d\n", pvDst, (uint8_t *)pvSrc + (GCPtrSrc & PAGE_OFFSET_MASK), cb));
2266	memcpy(pvDst, (uint8_t *)pvSrc + (GCPtrSrc & PAGE_OFFSET_MASK), cb);
2267	break;
2268	case VERR_PGM_PHYS_PAGE_RESERVED:
2269	case VERR_PGM_INVALID_GC_PHYSICAL_ADDRESS:
2270	memset(pvDst, 0, cb);
2271	break;
2272	default:
2273	return rc;
2274	}
2275
2276	/** @todo access bit emulation isn't 100% correct. */
2277	if (!(fFlags & X86_PTE_A))
2278	{
2279	rc = PGM_GST_PFN(ModifyPage,pVM)(pVM, GCPtrSrc, 1, X86_PTE_A, ~(uint64_t)X86_PTE_A);
2280	AssertRC(rc);
2281	}
2282	return VINF_SUCCESS;
2283	}
2284	}
2285	else
2286	{
2287	/*
2288	* Crosses pages.
2289	*/
2290	unsigned cb2 = cb - cb1;
2291	uint64_t fFlags1;
2292	RTGCPHYS GCPhys1;
2293	uint64_t fFlags2;
2294	RTGCPHYS GCPhys2;
2295	rc = PGM_GST_PFN(GetPage,pVM)(pVM, GCPtrSrc, &fFlags1, &GCPhys1);
2296	if (VBOX_SUCCESS(rc))
2297	rc = PGM_GST_PFN(GetPage,pVM)(pVM, GCPtrSrc + cb1, &fFlags2, &GCPhys2);
2298	if (VBOX_SUCCESS(rc))
2299	{
2300	/** @todo we should check reserved bits ... */
2301	AssertMsgFailed(("cb=%d cb1=%d cb2=%d GCPtrSrc=%VGv\n", cb, cb1, cb2, GCPtrSrc));
2302	void *pvSrc1;
2303	rc = PGM_GCPHYS_2_PTR(pVM, GCPhys1, &pvSrc1);
2304	switch (rc)
2305	{
2306	case VINF_SUCCESS:
2307	memcpy(pvDst, (uint8_t *)pvSrc1 + (GCPtrSrc & PAGE_OFFSET_MASK), cb1);
2308	break;
2309	case VERR_PGM_INVALID_GC_PHYSICAL_ADDRESS:
2310	memset(pvDst, 0, cb1);
2311	break;
2312	default:
2313	return rc;
2314	}
2315
2316	void *pvSrc2;
2317	rc = PGM_GCPHYS_2_PTR(pVM, GCPhys2, &pvSrc2);
2318	switch (rc)
2319	{
2320	case VINF_SUCCESS:
2321	memcpy((uint8_t *)pvDst + cb2, pvSrc2, cb2);
2322	break;
2323	case VERR_PGM_INVALID_GC_PHYSICAL_ADDRESS:
2324	memset((uint8_t *)pvDst + cb2, 0, cb2);
2325	break;
2326	default:
2327	return rc;
2328	}
2329
2330	if (!(fFlags1 & X86_PTE_A))
2331	{
2332	rc = PGM_GST_PFN(ModifyPage,pVM)(pVM, GCPtrSrc, 1, X86_PTE_A, ~(uint64_t)X86_PTE_A);
2333	AssertRC(rc);
2334	}
2335	if (!(fFlags2 & X86_PTE_A))
2336	{
2337	rc = PGM_GST_PFN(ModifyPage,pVM)(pVM, GCPtrSrc + cb1, 1, X86_PTE_A, ~(uint64_t)X86_PTE_A);
2338	AssertRC(rc);
2339	}
2340	return VINF_SUCCESS;
2341	}
2342	}
2343
2344	/*
2345	* Raise a #PF.
2346	*/
2347	uint32_t uErr;
2348
2349	/* Get the current privilege level. */
2350	uint32_t cpl = CPUMGetGuestCPL(pVM, pCtxCore);
2351	switch (rc)
2352	{
2353	case VINF_SUCCESS:
2354	uErr = (cpl >= 2) ? X86_TRAP_PF_RSVD \| X86_TRAP_PF_US : X86_TRAP_PF_RSVD;
2355	break;
2356
2357	case VERR_PAGE_NOT_PRESENT:
2358	case VERR_PAGE_TABLE_NOT_PRESENT:
2359	uErr = (cpl >= 2) ? X86_TRAP_PF_US : 0;
2360	break;
2361
2362	default:
2363	AssertMsgFailed(("rc=%Vrc GCPtrSrc=%VGv cb=%#x\n", rc, GCPtrSrc, cb));
2364	return rc;
2365	}
2366	Log(("PGMPhysInterpretedRead: GCPtrSrc=%VGv cb=%#x -> #PF(%#x)\n", GCPtrSrc, cb, uErr));
2367	return TRPMRaiseXcptErrCR2(pVM, pCtxCore, X86_XCPT_PF, uErr, GCPtrSrc);
2368	}
2369
2370	/// @todo PGMDECL(int) PGMPhysInterpretedWrite(PVM pVM, PCPUMCTXCORE pCtxCore, RTGCPTR GCPtrDst, const void *pvSrc, size_t cb)
2371
2372

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source: vbox/trunk/src/VBox/VMM/VMMAll/PGMAllPhys.cpp@ 8863

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