PGMPhys.cpp@ 45808

Last change on this file since 45808 was 45618, checked in by vboxsync, 12 years ago
Do HMR3Init first in vmR3InitRing3 so the other components can skip raw-mode bits during init.
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File size: 167.2 KB

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1	/* $Id: PGMPhys.cpp 45618 2013-04-18 18:41:07Z vboxsync $ */
2	/** @file
3	* PGM - Page Manager and Monitor, Physical Memory Addressing.
4	*/
5
6	/*
7	* Copyright (C) 2006-2013 Oracle Corporation
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.virtualbox.org. This file is free software;
11	* you can redistribute it and/or modify it under the terms of the GNU
12	* General Public License (GPL) as published by the Free Software
13	* Foundation, in version 2 as it comes in the "COPYING" file of the
14	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16	*/
17
18
19	/*******************************************************************************
20	* Header Files *
21	*******************************************************************************/
22	#define LOG_GROUP LOG_GROUP_PGM_PHYS
23	#include <VBox/vmm/pgm.h>
24	#include <VBox/vmm/iom.h>
25	#include <VBox/vmm/mm.h>
26	#include <VBox/vmm/stam.h>
27	#ifdef VBOX_WITH_REM
28	# include <VBox/vmm/rem.h>
29	#endif
30	#include <VBox/vmm/pdmdev.h>
31	#include "PGMInternal.h"
32	#include <VBox/vmm/vm.h>
33	#include <VBox/vmm/uvm.h>
34	#include "PGMInline.h"
35	#include <VBox/sup.h>
36	#include <VBox/param.h>
37	#include <VBox/err.h>
38	#include <VBox/log.h>
39	#include <iprt/assert.h>
40	#include <iprt/alloc.h>
41	#include <iprt/asm.h>
42	#ifdef VBOX_STRICT
43	# include <iprt/crc.h>
44	#endif
45	#include <iprt/thread.h>
46	#include <iprt/string.h>
47	#include <iprt/system.h>
48
49
50	/*******************************************************************************
51	* Defined Constants And Macros *
52	*******************************************************************************/
53	/** The number of pages to free in one batch. */
54	#define PGMPHYS_FREE_PAGE_BATCH_SIZE 128
55
56
57	/*******************************************************************************
58	* Internal Functions *
59	*******************************************************************************/
60	static DECLCALLBACK(int) pgmR3PhysRomWriteHandler(PVM pVM, RTGCPHYS GCPhys, void pvPhys, void pvBuf, size_t cbBuf, PGMACCESSTYPE enmAccessType, void *pvUser);
61
62
63	/*
64	* PGMR3PhysReadU8-64
65	* PGMR3PhysWriteU8-64
66	*/
67	#define PGMPHYSFN_READNAME PGMR3PhysReadU8
68	#define PGMPHYSFN_WRITENAME PGMR3PhysWriteU8
69	#define PGMPHYS_DATASIZE 1
70	#define PGMPHYS_DATATYPE uint8_t
71	#include "PGMPhysRWTmpl.h"
72
73	#define PGMPHYSFN_READNAME PGMR3PhysReadU16
74	#define PGMPHYSFN_WRITENAME PGMR3PhysWriteU16
75	#define PGMPHYS_DATASIZE 2
76	#define PGMPHYS_DATATYPE uint16_t
77	#include "PGMPhysRWTmpl.h"
78
79	#define PGMPHYSFN_READNAME PGMR3PhysReadU32
80	#define PGMPHYSFN_WRITENAME PGMR3PhysWriteU32
81	#define PGMPHYS_DATASIZE 4
82	#define PGMPHYS_DATATYPE uint32_t
83	#include "PGMPhysRWTmpl.h"
84
85	#define PGMPHYSFN_READNAME PGMR3PhysReadU64
86	#define PGMPHYSFN_WRITENAME PGMR3PhysWriteU64
87	#define PGMPHYS_DATASIZE 8
88	#define PGMPHYS_DATATYPE uint64_t
89	#include "PGMPhysRWTmpl.h"
90
91
92	/**
93	* EMT worker for PGMR3PhysReadExternal.
94	*/
95	static DECLCALLBACK(int) pgmR3PhysReadExternalEMT(PVM pVM, PRTGCPHYS pGCPhys, void *pvBuf, size_t cbRead)
96	{
97	PGMPhysRead(pVM, *pGCPhys, pvBuf, cbRead);
98	return VINF_SUCCESS;
99	}
100
101
102	/**
103	* Read from physical memory, external users.
104	*
105	* @returns VBox status code.
106	* @retval VINF_SUCCESS.
107	*
108	* @param pVM Pointer to the VM.
109	* @param GCPhys Physical address to read from.
110	* @param pvBuf Where to read into.
111	* @param cbRead How many bytes to read.
112	*
113	* @thread Any but EMTs.
114	*/
115	VMMR3DECL(int) PGMR3PhysReadExternal(PVM pVM, RTGCPHYS GCPhys, void *pvBuf, size_t cbRead)
116	{
117	VM_ASSERT_OTHER_THREAD(pVM);
118
119	AssertMsgReturn(cbRead > 0, ("don't even think about reading zero bytes!\n"), VINF_SUCCESS);
120	LogFlow(("PGMR3PhysReadExternal: %RGp %d\n", GCPhys, cbRead));
121
122	pgmLock(pVM);
123
124	/*
125	* Copy loop on ram ranges.
126	*/
127	PPGMRAMRANGE pRam = pgmPhysGetRangeAtOrAbove(pVM, GCPhys);
128	for (;;)
129	{
130	/* Inside range or not? */
131	if (pRam && GCPhys >= pRam->GCPhys)
132	{
133	/*
134	* Must work our way thru this page by page.
135	*/
136	RTGCPHYS off = GCPhys - pRam->GCPhys;
137	while (off < pRam->cb)
138	{
139	unsigned iPage = off >> PAGE_SHIFT;
140	PPGMPAGE pPage = &pRam->aPages[iPage];
141
142	/*
143	* If the page has an ALL access handler, we'll have to
144	* delegate the job to EMT.
145	*/
146	if (PGM_PAGE_HAS_ACTIVE_ALL_HANDLERS(pPage))
147	{
148	pgmUnlock(pVM);
149
150	return VMR3ReqPriorityCallWait(pVM, VMCPUID_ANY, (PFNRT)pgmR3PhysReadExternalEMT, 4,
151	pVM, &GCPhys, pvBuf, cbRead);
152	}
153	Assert(!PGM_PAGE_IS_MMIO(pPage));
154
155	/*
156	* Simple stuff, go ahead.
157	*/
158	size_t cb = PAGE_SIZE - (off & PAGE_OFFSET_MASK);
159	if (cb > cbRead)
160	cb = cbRead;
161	PGMPAGEMAPLOCK PgMpLck;
162	const void *pvSrc;
163	int rc = pgmPhysGCPhys2CCPtrInternalReadOnly(pVM, pPage, pRam->GCPhys + off, &pvSrc, &PgMpLck);
164	if (RT_SUCCESS(rc))
165	{
166	memcpy(pvBuf, pvSrc, cb);
167	pgmPhysReleaseInternalPageMappingLock(pVM, &PgMpLck);
168	}
169	else
170	{
171	AssertLogRelMsgFailed(("pgmPhysGCPhys2CCPtrInternalReadOnly failed on %RGp / %R[pgmpage] -> %Rrc\n",
172	pRam->GCPhys + off, pPage, rc));
173	memset(pvBuf, 0xff, cb);
174	}
175
176	/* next page */
177	if (cb >= cbRead)
178	{
179	pgmUnlock(pVM);
180	return VINF_SUCCESS;
181	}
182	cbRead -= cb;
183	off += cb;
184	GCPhys += cb;
185	pvBuf = (char *)pvBuf + cb;
186	} /* walk pages in ram range. */
187	}
188	else
189	{
190	LogFlow(("PGMPhysRead: Unassigned %RGp size=%u\n", GCPhys, cbRead));
191
192	/*
193	* Unassigned address space.
194	*/
195	size_t cb = pRam ? pRam->GCPhys - GCPhys : ~(size_t)0;
196	if (cb >= cbRead)
197	{
198	memset(pvBuf, 0xff, cbRead);
199	break;
200	}
201	memset(pvBuf, 0xff, cb);
202
203	cbRead -= cb;
204	pvBuf = (char *)pvBuf + cb;
205	GCPhys += cb;
206	}
207
208	/* Advance range if necessary. */
209	while (pRam && GCPhys > pRam->GCPhysLast)
210	pRam = pRam->CTX_SUFF(pNext);
211	} /* Ram range walk */
212
213	pgmUnlock(pVM);
214
215	return VINF_SUCCESS;
216	}
217
218
219	/**
220	* EMT worker for PGMR3PhysWriteExternal.
221	*/
222	static DECLCALLBACK(int) pgmR3PhysWriteExternalEMT(PVM pVM, PRTGCPHYS pGCPhys, const void *pvBuf, size_t cbWrite)
223	{
224	/** @todo VERR_EM_NO_MEMORY */
225	PGMPhysWrite(pVM, *pGCPhys, pvBuf, cbWrite);
226	return VINF_SUCCESS;
227	}
228
229
230	/**
231	* Write to physical memory, external users.
232	*
233	* @returns VBox status code.
234	* @retval VINF_SUCCESS.
235	* @retval VERR_EM_NO_MEMORY.
236	*
237	* @param pVM Pointer to the VM.
238	* @param GCPhys Physical address to write to.
239	* @param pvBuf What to write.
240	* @param cbWrite How many bytes to write.
241	* @param pszWho Who is writing. For tracking down who is writing
242	* after we've saved the state.
243	*
244	* @thread Any but EMTs.
245	*/
246	VMMDECL(int) PGMR3PhysWriteExternal(PVM pVM, RTGCPHYS GCPhys, const void pvBuf, size_t cbWrite, const char pszWho)
247	{
248	VM_ASSERT_OTHER_THREAD(pVM);
249
250	AssertMsg(!pVM->pgm.s.fNoMorePhysWrites,
251	("Calling PGMR3PhysWriteExternal after pgmR3Save()! GCPhys=%RGp cbWrite=%#x pszWho=%s\n",
252	GCPhys, cbWrite, pszWho));
253	AssertMsgReturn(cbWrite > 0, ("don't even think about writing zero bytes!\n"), VINF_SUCCESS);
254	LogFlow(("PGMR3PhysWriteExternal: %RGp %d\n", GCPhys, cbWrite));
255
256	pgmLock(pVM);
257
258	/*
259	* Copy loop on ram ranges, stop when we hit something difficult.
260	*/
261	PPGMRAMRANGE pRam = pgmPhysGetRangeAtOrAbove(pVM, GCPhys);
262	for (;;)
263	{
264	/* Inside range or not? */
265	if (pRam && GCPhys >= pRam->GCPhys)
266	{
267	/*
268	* Must work our way thru this page by page.
269	*/
270	RTGCPTR off = GCPhys - pRam->GCPhys;
271	while (off < pRam->cb)
272	{
273	RTGCPTR iPage = off >> PAGE_SHIFT;
274	PPGMPAGE pPage = &pRam->aPages[iPage];
275
276	/*
277	* Is the page problematic, we have to do the work on the EMT.
278	*
279	* Allocating writable pages and access handlers are
280	* problematic, write monitored pages are simple and can be
281	* dealt with here.
282	*/
283	if ( PGM_PAGE_HAS_ACTIVE_HANDLERS(pPage)
284	\|\| PGM_PAGE_GET_STATE(pPage) != PGM_PAGE_STATE_ALLOCATED)
285	{
286	if ( PGM_PAGE_GET_STATE(pPage) == PGM_PAGE_STATE_WRITE_MONITORED
287	&& !PGM_PAGE_HAS_ACTIVE_HANDLERS(pPage))
288	pgmPhysPageMakeWriteMonitoredWritable(pVM, pPage);
289	else
290	{
291	pgmUnlock(pVM);
292
293	return VMR3ReqPriorityCallWait(pVM, VMCPUID_ANY, (PFNRT)pgmR3PhysWriteExternalEMT, 4,
294	pVM, &GCPhys, pvBuf, cbWrite);
295	}
296	}
297	Assert(!PGM_PAGE_IS_MMIO(pPage));
298
299	/*
300	* Simple stuff, go ahead.
301	*/
302	size_t cb = PAGE_SIZE - (off & PAGE_OFFSET_MASK);
303	if (cb > cbWrite)
304	cb = cbWrite;
305	PGMPAGEMAPLOCK PgMpLck;
306	void *pvDst;
307	int rc = pgmPhysGCPhys2CCPtrInternal(pVM, pPage, pRam->GCPhys + off, &pvDst, &PgMpLck);
308	if (RT_SUCCESS(rc))
309	{
310	memcpy(pvDst, pvBuf, cb);
311	pgmPhysReleaseInternalPageMappingLock(pVM, &PgMpLck);
312	}
313	else
314	AssertLogRelMsgFailed(("pgmPhysGCPhys2CCPtrInternal failed on %RGp / %R[pgmpage] -> %Rrc\n",
315	pRam->GCPhys + off, pPage, rc));
316
317	/* next page */
318	if (cb >= cbWrite)
319	{
320	pgmUnlock(pVM);
321	return VINF_SUCCESS;
322	}
323
324	cbWrite -= cb;
325	off += cb;
326	GCPhys += cb;
327	pvBuf = (const char *)pvBuf + cb;
328	} /* walk pages in ram range */
329	}
330	else
331	{
332	/*
333	* Unassigned address space, skip it.
334	*/
335	if (!pRam)
336	break;
337	size_t cb = pRam->GCPhys - GCPhys;
338	if (cb >= cbWrite)
339	break;
340	cbWrite -= cb;
341	pvBuf = (const char *)pvBuf + cb;
342	GCPhys += cb;
343	}
344
345	/* Advance range if necessary. */
346	while (pRam && GCPhys > pRam->GCPhysLast)
347	pRam = pRam->CTX_SUFF(pNext);
348	} /* Ram range walk */
349
350	pgmUnlock(pVM);
351	return VINF_SUCCESS;
352	}
353
354
355	/**
356	* VMR3ReqCall worker for PGMR3PhysGCPhys2CCPtrExternal to make pages writable.
357	*
358	* @returns see PGMR3PhysGCPhys2CCPtrExternal
359	* @param pVM Pointer to the VM.
360	* @param pGCPhys Pointer to the guest physical address.
361	* @param ppv Where to store the mapping address.
362	* @param pLock Where to store the lock.
363	*/
364	static DECLCALLBACK(int) pgmR3PhysGCPhys2CCPtrDelegated(PVM pVM, PRTGCPHYS pGCPhys, void **ppv, PPGMPAGEMAPLOCK pLock)
365	{
366	/*
367	* Just hand it to PGMPhysGCPhys2CCPtr and check that it's not a page with
368	* an access handler after it succeeds.
369	*/
370	int rc = pgmLock(pVM);
371	AssertRCReturn(rc, rc);
372
373	rc = PGMPhysGCPhys2CCPtr(pVM, *pGCPhys, ppv, pLock);
374	if (RT_SUCCESS(rc))
375	{
376	PPGMPAGEMAPTLBE pTlbe;
377	int rc2 = pgmPhysPageQueryTlbe(pVM, *pGCPhys, &pTlbe);
378	AssertFatalRC(rc2);
379	PPGMPAGE pPage = pTlbe->pPage;
380	if (PGM_PAGE_IS_MMIO(pPage))
381	{
382	PGMPhysReleasePageMappingLock(pVM, pLock);
383	rc = VERR_PGM_PHYS_PAGE_RESERVED;
384	}
385	else if ( PGM_PAGE_HAS_ACTIVE_HANDLERS(pPage)
386	#ifdef PGMPOOL_WITH_OPTIMIZED_DIRTY_PT
387	\|\| pgmPoolIsDirtyPage(pVM, *pGCPhys)
388	#endif
389	)
390	{
391	/* We must flush any corresponding pgm pool page here, otherwise we'll
392	* not be informed about writes and keep bogus gst->shw mappings around.
393	*/
394	pgmPoolFlushPageByGCPhys(pVM, *pGCPhys);
395	Assert(!PGM_PAGE_HAS_ACTIVE_HANDLERS(pPage));
396	/** @todo r=bird: return VERR_PGM_PHYS_PAGE_RESERVED here if it still has
397	* active handlers, see the PGMR3PhysGCPhys2CCPtrExternal docs. */
398	}
399	}
400
401	pgmUnlock(pVM);
402	return rc;
403	}
404
405
406	/**
407	* Requests the mapping of a guest page into ring-3, external threads.
408	*
409	* When you're done with the page, call PGMPhysReleasePageMappingLock() ASAP to
410	* release it.
411	*
412	* This API will assume your intention is to write to the page, and will
413	* therefore replace shared and zero pages. If you do not intend to modify the
414	* page, use the PGMR3PhysGCPhys2CCPtrReadOnlyExternal() API.
415	*
416	* @returns VBox status code.
417	* @retval VINF_SUCCESS on success.
418	* @retval VERR_PGM_PHYS_PAGE_RESERVED it it's a valid page but has no physical
419	* backing or if the page has any active access handlers. The caller
420	* must fall back on using PGMR3PhysWriteExternal.
421	* @retval VERR_PGM_INVALID_GC_PHYSICAL_ADDRESS if it's not a valid physical address.
422	*
423	* @param pVM Pointer to the VM.
424	* @param GCPhys The guest physical address of the page that should be mapped.
425	* @param ppv Where to store the address corresponding to GCPhys.
426	* @param pLock Where to store the lock information that PGMPhysReleasePageMappingLock needs.
427	*
428	* @remark Avoid calling this API from within critical sections (other than the
429	* PGM one) because of the deadlock risk when we have to delegating the
430	* task to an EMT.
431	* @thread Any.
432	*/
433	VMMR3DECL(int) PGMR3PhysGCPhys2CCPtrExternal(PVM pVM, RTGCPHYS GCPhys, void **ppv, PPGMPAGEMAPLOCK pLock)
434	{
435	AssertPtr(ppv);
436	AssertPtr(pLock);
437
438	Assert(VM_IS_EMT(pVM) \|\| !PGMIsLockOwner(pVM));
439
440	int rc = pgmLock(pVM);
441	AssertRCReturn(rc, rc);
442
443	/*
444	* Query the Physical TLB entry for the page (may fail).
445	*/
446	PPGMPAGEMAPTLBE pTlbe;
447	rc = pgmPhysPageQueryTlbe(pVM, GCPhys, &pTlbe);
448	if (RT_SUCCESS(rc))
449	{
450	PPGMPAGE pPage = pTlbe->pPage;
451	if (PGM_PAGE_IS_MMIO(pPage))
452	rc = VERR_PGM_PHYS_PAGE_RESERVED;
453	else
454	{
455	/*
456	* If the page is shared, the zero page, or being write monitored
457	* it must be converted to an page that's writable if possible.
458	* We can only deal with write monitored pages here, the rest have
459	* to be on an EMT.
460	*/
461	if ( PGM_PAGE_HAS_ACTIVE_HANDLERS(pPage)
462	\|\| PGM_PAGE_GET_STATE(pPage) != PGM_PAGE_STATE_ALLOCATED
463	#ifdef PGMPOOL_WITH_OPTIMIZED_DIRTY_PT
464	\|\| pgmPoolIsDirtyPage(pVM, GCPhys)
465	#endif
466	)
467	{
468	if ( PGM_PAGE_GET_STATE(pPage) == PGM_PAGE_STATE_WRITE_MONITORED
469	&& !PGM_PAGE_HAS_ACTIVE_HANDLERS(pPage)
470	#ifdef PGMPOOL_WITH_OPTIMIZED_DIRTY_PT
471	&& !pgmPoolIsDirtyPage(pVM, GCPhys)
472	#endif
473	)
474	pgmPhysPageMakeWriteMonitoredWritable(pVM, pPage);
475	else
476	{
477	pgmUnlock(pVM);
478
479	return VMR3ReqPriorityCallWait(pVM, VMCPUID_ANY, (PFNRT)pgmR3PhysGCPhys2CCPtrDelegated, 4,
480	pVM, &GCPhys, ppv, pLock);
481	}
482	}
483
484	/*
485	* Now, just perform the locking and calculate the return address.
486	*/
487	PPGMPAGEMAP pMap = pTlbe->pMap;
488	if (pMap)
489	pMap->cRefs++;
490
491	unsigned cLocks = PGM_PAGE_GET_WRITE_LOCKS(pPage);
492	if (RT_LIKELY(cLocks < PGM_PAGE_MAX_LOCKS - 1))
493	{
494	if (cLocks == 0)
495	pVM->pgm.s.cWriteLockedPages++;
496	PGM_PAGE_INC_WRITE_LOCKS(pPage);
497	}
498	else if (cLocks != PGM_PAGE_GET_WRITE_LOCKS(pPage))
499	{
500	PGM_PAGE_INC_WRITE_LOCKS(pPage);
501	AssertMsgFailed(("%RGp / %R[pgmpage] is entering permanent write locked state!\n", GCPhys, pPage));
502	if (pMap)
503	pMap->cRefs++; /* Extra ref to prevent it from going away. */
504	}
505
506	ppv = (void )((uintptr_t)pTlbe->pv \| (uintptr_t)(GCPhys & PAGE_OFFSET_MASK));
507	pLock->uPageAndType = (uintptr_t)pPage \| PGMPAGEMAPLOCK_TYPE_WRITE;
508	pLock->pvMap = pMap;
509	}
510	}
511
512	pgmUnlock(pVM);
513	return rc;
514	}
515
516
517	/**
518	* Requests the mapping of a guest page into ring-3, external threads.
519	*
520	* When you're done with the page, call PGMPhysReleasePageMappingLock() ASAP to
521	* release it.
522	*
523	* @returns VBox status code.
524	* @retval VINF_SUCCESS on success.
525	* @retval VERR_PGM_PHYS_PAGE_RESERVED it it's a valid page but has no physical
526	* backing or if the page as an active ALL access handler. The caller
527	* must fall back on using PGMPhysRead.
528	* @retval VERR_PGM_INVALID_GC_PHYSICAL_ADDRESS if it's not a valid physical address.
529	*
530	* @param pVM Pointer to the VM.
531	* @param GCPhys The guest physical address of the page that should be mapped.
532	* @param ppv Where to store the address corresponding to GCPhys.
533	* @param pLock Where to store the lock information that PGMPhysReleasePageMappingLock needs.
534	*
535	* @remark Avoid calling this API from within critical sections (other than
536	* the PGM one) because of the deadlock risk.
537	* @thread Any.
538	*/
539	VMMR3DECL(int) PGMR3PhysGCPhys2CCPtrReadOnlyExternal(PVM pVM, RTGCPHYS GCPhys, void const **ppv, PPGMPAGEMAPLOCK pLock)
540	{
541	int rc = pgmLock(pVM);
542	AssertRCReturn(rc, rc);
543
544	/*
545	* Query the Physical TLB entry for the page (may fail).
546	*/
547	PPGMPAGEMAPTLBE pTlbe;
548	rc = pgmPhysPageQueryTlbe(pVM, GCPhys, &pTlbe);
549	if (RT_SUCCESS(rc))
550	{
551	PPGMPAGE pPage = pTlbe->pPage;
552	#if 1
553	/* MMIO pages doesn't have any readable backing. */
554	if (PGM_PAGE_IS_MMIO(pPage))
555	rc = VERR_PGM_PHYS_PAGE_RESERVED;
556	#else
557	if (PGM_PAGE_HAS_ACTIVE_ALL_HANDLERS(pPage))
558	rc = VERR_PGM_PHYS_PAGE_RESERVED;
559	#endif
560	else
561	{
562	/*
563	* Now, just perform the locking and calculate the return address.
564	*/
565	PPGMPAGEMAP pMap = pTlbe->pMap;
566	if (pMap)
567	pMap->cRefs++;
568
569	unsigned cLocks = PGM_PAGE_GET_READ_LOCKS(pPage);
570	if (RT_LIKELY(cLocks < PGM_PAGE_MAX_LOCKS - 1))
571	{
572	if (cLocks == 0)
573	pVM->pgm.s.cReadLockedPages++;
574	PGM_PAGE_INC_READ_LOCKS(pPage);
575	}
576	else if (cLocks != PGM_PAGE_GET_READ_LOCKS(pPage))
577	{
578	PGM_PAGE_INC_READ_LOCKS(pPage);
579	AssertMsgFailed(("%RGp / %R[pgmpage] is entering permanent readonly locked state!\n", GCPhys, pPage));
580	if (pMap)
581	pMap->cRefs++; /* Extra ref to prevent it from going away. */
582	}
583
584	ppv = (void )((uintptr_t)pTlbe->pv \| (uintptr_t)(GCPhys & PAGE_OFFSET_MASK));
585	pLock->uPageAndType = (uintptr_t)pPage \| PGMPAGEMAPLOCK_TYPE_READ;
586	pLock->pvMap = pMap;
587	}
588	}
589
590	pgmUnlock(pVM);
591	return rc;
592	}
593
594
595	#define MAKE_LEAF(a_pNode) \
596	do { \
597	(a_pNode)->pLeftR3 = NIL_RTR3PTR; \
598	(a_pNode)->pRightR3 = NIL_RTR3PTR; \
599	(a_pNode)->pLeftR0 = NIL_RTR0PTR; \
600	(a_pNode)->pRightR0 = NIL_RTR0PTR; \
601	(a_pNode)->pLeftRC = NIL_RTRCPTR; \
602	(a_pNode)->pRightRC = NIL_RTRCPTR; \
603	} while (0)
604
605	#define INSERT_LEFT(a_pParent, a_pNode) \
606	do { \
607	(a_pParent)->pLeftR3 = (a_pNode); \
608	(a_pParent)->pLeftR0 = (a_pNode)->pSelfR0; \
609	(a_pParent)->pLeftRC = (a_pNode)->pSelfRC; \
610	} while (0)
611	#define INSERT_RIGHT(a_pParent, a_pNode) \
612	do { \
613	(a_pParent)->pRightR3 = (a_pNode); \
614	(a_pParent)->pRightR0 = (a_pNode)->pSelfR0; \
615	(a_pParent)->pRightRC = (a_pNode)->pSelfRC; \
616	} while (0)
617
618
619	/**
620	* Recursive tree builder.
621	*
622	* @param ppRam Pointer to the iterator variable.
623	* @param iHeight The hight about normal leaf nodes. Inserts a leaf
624	* node if 0.
625	*/
626	static PPGMRAMRANGE pgmR3PhysRebuildRamRangeSearchTreesRecursively(PPGMRAMRANGE *ppRam, int iDepth)
627	{
628	PPGMRAMRANGE pRam;
629	if (iDepth <= 0)
630	{
631	/*
632	* Leaf node.
633	*/
634	pRam = *ppRam;
635	if (pRam)
636	{
637	*ppRam = pRam->pNextR3;
638	MAKE_LEAF(pRam);
639	}
640	}
641	else
642	{
643
644	/*
645	* Intermediate node.
646	*/
647	PPGMRAMRANGE pLeft = pgmR3PhysRebuildRamRangeSearchTreesRecursively(ppRam, iDepth - 1);
648
649	pRam = *ppRam;
650	if (!pRam)
651	return pLeft;
652	*ppRam = pRam->pNextR3;
653	MAKE_LEAF(pRam);
654	INSERT_LEFT(pRam, pLeft);
655
656	PPGMRAMRANGE pRight = pgmR3PhysRebuildRamRangeSearchTreesRecursively(ppRam, iDepth - 1);
657	if (pRight)
658	INSERT_RIGHT(pRam, pRight);
659	}
660	return pRam;
661	}
662
663
664	/**
665	* Rebuilds the RAM range search trees.
666	*
667	* @param pVM Pointer to the VM.
668	*/
669	static void pgmR3PhysRebuildRamRangeSearchTrees(PVM pVM)
670	{
671
672	/*
673	* Create the reasonably balanced tree in a sequential fashion.
674	* For simplicity (laziness) we use standard recursion here.
675	*/
676	int iDepth = 0;
677	PPGMRAMRANGE pRam = pVM->pgm.s.pRamRangesXR3;
678	PPGMRAMRANGE pRoot = pgmR3PhysRebuildRamRangeSearchTreesRecursively(&pRam, 0);
679	while (pRam)
680	{
681	PPGMRAMRANGE pLeft = pRoot;
682
683	pRoot = pRam;
684	pRam = pRam->pNextR3;
685	MAKE_LEAF(pRoot);
686	INSERT_LEFT(pRoot, pLeft);
687
688	PPGMRAMRANGE pRight = pgmR3PhysRebuildRamRangeSearchTreesRecursively(&pRam, iDepth);
689	if (pRight)
690	INSERT_RIGHT(pRoot, pRight);
691	/** @todo else: rotate the tree. */
692
693	iDepth++;
694	}
695
696	pVM->pgm.s.pRamRangeTreeR3 = pRoot;
697	pVM->pgm.s.pRamRangeTreeR0 = pRoot ? pRoot->pSelfR0 : NIL_RTR0PTR;
698	pVM->pgm.s.pRamRangeTreeRC = pRoot ? pRoot->pSelfRC : NIL_RTRCPTR;
699
700	#ifdef VBOX_STRICT
701	/*
702	* Verify that the above code works.
703	*/
704	unsigned cRanges = 0;
705	for (pRam = pVM->pgm.s.pRamRangesXR3; pRam; pRam = pRam->pNextR3)
706	cRanges++;
707	Assert(cRanges > 0);
708
709	unsigned cMaxDepth = ASMBitLastSetU32(cRanges);
710	if ((1U << cMaxDepth) < cRanges)
711	cMaxDepth++;
712
713	for (pRam = pVM->pgm.s.pRamRangesXR3; pRam; pRam = pRam->pNextR3)
714	{
715	unsigned cDepth = 0;
716	PPGMRAMRANGE pRam2 = pVM->pgm.s.pRamRangeTreeR3;
717	for (;;)
718	{
719	if (pRam == pRam2)
720	break;
721	Assert(pRam2);
722	if (pRam->GCPhys < pRam2->GCPhys)
723	pRam2 = pRam2->pLeftR3;
724	else
725	pRam2 = pRam2->pRightR3;
726	}
727	AssertMsg(cDepth <= cMaxDepth, ("cDepth=%d cMaxDepth=%d\n", cDepth, cMaxDepth));
728	}
729	#endif /* VBOX_STRICT */
730	}
731
732	#undef MAKE_LEAF
733	#undef INSERT_LEFT
734	#undef INSERT_RIGHT
735
736	/**
737	* Relinks the RAM ranges using the pSelfRC and pSelfR0 pointers.
738	*
739	* Called when anything was relocated.
740	*
741	* @param pVM Pointer to the VM.
742	*/
743	void pgmR3PhysRelinkRamRanges(PVM pVM)
744	{
745	PPGMRAMRANGE pCur;
746
747	#ifdef VBOX_STRICT
748	for (pCur = pVM->pgm.s.pRamRangesXR3; pCur; pCur = pCur->pNextR3)
749	{
750	Assert((pCur->fFlags & PGM_RAM_RANGE_FLAGS_FLOATING) \|\| pCur->pSelfR0 == MMHyperCCToR0(pVM, pCur));
751	Assert((pCur->fFlags & PGM_RAM_RANGE_FLAGS_FLOATING) \|\| pCur->pSelfRC == MMHyperCCToRC(pVM, pCur));
752	Assert((pCur->GCPhys & PAGE_OFFSET_MASK) == 0);
753	Assert((pCur->GCPhysLast & PAGE_OFFSET_MASK) == PAGE_OFFSET_MASK);
754	Assert((pCur->cb & PAGE_OFFSET_MASK) == 0);
755	Assert(pCur->cb == pCur->GCPhysLast - pCur->GCPhys + 1);
756	for (PPGMRAMRANGE pCur2 = pVM->pgm.s.pRamRangesXR3; pCur2; pCur2 = pCur2->pNextR3)
757	Assert( pCur2 == pCur
758	\|\| strcmp(pCur2->pszDesc, pCur->pszDesc)); /** @todo fix MMIO ranges!! */
759	}
760	#endif
761
762	pCur = pVM->pgm.s.pRamRangesXR3;
763	if (pCur)
764	{
765	pVM->pgm.s.pRamRangesXR0 = pCur->pSelfR0;
766	pVM->pgm.s.pRamRangesXRC = pCur->pSelfRC;
767
768	for (; pCur->pNextR3; pCur = pCur->pNextR3)
769	{
770	pCur->pNextR0 = pCur->pNextR3->pSelfR0;
771	pCur->pNextRC = pCur->pNextR3->pSelfRC;
772	}
773
774	Assert(pCur->pNextR0 == NIL_RTR0PTR);
775	Assert(pCur->pNextRC == NIL_RTRCPTR);
776	}
777	else
778	{
779	Assert(pVM->pgm.s.pRamRangesXR0 == NIL_RTR0PTR);
780	Assert(pVM->pgm.s.pRamRangesXRC == NIL_RTRCPTR);
781	}
782	ASMAtomicIncU32(&pVM->pgm.s.idRamRangesGen);
783
784	pgmR3PhysRebuildRamRangeSearchTrees(pVM);
785	}
786
787
788	/**
789	* Links a new RAM range into the list.
790	*
791	* @param pVM Pointer to the VM.
792	* @param pNew Pointer to the new list entry.
793	* @param pPrev Pointer to the previous list entry. If NULL, insert as head.
794	*/
795	static void pgmR3PhysLinkRamRange(PVM pVM, PPGMRAMRANGE pNew, PPGMRAMRANGE pPrev)
796	{
797	AssertMsg(pNew->pszDesc, ("%RGp-%RGp\n", pNew->GCPhys, pNew->GCPhysLast));
798	Assert((pNew->fFlags & PGM_RAM_RANGE_FLAGS_FLOATING) \|\| pNew->pSelfR0 == MMHyperCCToR0(pVM, pNew));
799	Assert((pNew->fFlags & PGM_RAM_RANGE_FLAGS_FLOATING) \|\| pNew->pSelfRC == MMHyperCCToRC(pVM, pNew));
800
801	pgmLock(pVM);
802
803	PPGMRAMRANGE pRam = pPrev ? pPrev->pNextR3 : pVM->pgm.s.pRamRangesXR3;
804	pNew->pNextR3 = pRam;
805	pNew->pNextR0 = pRam ? pRam->pSelfR0 : NIL_RTR0PTR;
806	pNew->pNextRC = pRam ? pRam->pSelfRC : NIL_RTRCPTR;
807
808	if (pPrev)
809	{
810	pPrev->pNextR3 = pNew;
811	pPrev->pNextR0 = pNew->pSelfR0;
812	pPrev->pNextRC = pNew->pSelfRC;
813	}
814	else
815	{
816	pVM->pgm.s.pRamRangesXR3 = pNew;
817	pVM->pgm.s.pRamRangesXR0 = pNew->pSelfR0;
818	pVM->pgm.s.pRamRangesXRC = pNew->pSelfRC;
819	}
820	ASMAtomicIncU32(&pVM->pgm.s.idRamRangesGen);
821
822	pgmR3PhysRebuildRamRangeSearchTrees(pVM);
823	pgmUnlock(pVM);
824	}
825
826
827	/**
828	* Unlink an existing RAM range from the list.
829	*
830	* @param pVM Pointer to the VM.
831	* @param pRam Pointer to the new list entry.
832	* @param pPrev Pointer to the previous list entry. If NULL, insert as head.
833	*/
834	static void pgmR3PhysUnlinkRamRange2(PVM pVM, PPGMRAMRANGE pRam, PPGMRAMRANGE pPrev)
835	{
836	Assert(pPrev ? pPrev->pNextR3 == pRam : pVM->pgm.s.pRamRangesXR3 == pRam);
837	Assert((pRam->fFlags & PGM_RAM_RANGE_FLAGS_FLOATING) \|\| pRam->pSelfR0 == MMHyperCCToR0(pVM, pRam));
838	Assert((pRam->fFlags & PGM_RAM_RANGE_FLAGS_FLOATING) \|\| pRam->pSelfRC == MMHyperCCToRC(pVM, pRam));
839
840	pgmLock(pVM);
841
842	PPGMRAMRANGE pNext = pRam->pNextR3;
843	if (pPrev)
844	{
845	pPrev->pNextR3 = pNext;
846	pPrev->pNextR0 = pNext ? pNext->pSelfR0 : NIL_RTR0PTR;
847	pPrev->pNextRC = pNext ? pNext->pSelfRC : NIL_RTRCPTR;
848	}
849	else
850	{
851	Assert(pVM->pgm.s.pRamRangesXR3 == pRam);
852	pVM->pgm.s.pRamRangesXR3 = pNext;
853	pVM->pgm.s.pRamRangesXR0 = pNext ? pNext->pSelfR0 : NIL_RTR0PTR;
854	pVM->pgm.s.pRamRangesXRC = pNext ? pNext->pSelfRC : NIL_RTRCPTR;
855	}
856	ASMAtomicIncU32(&pVM->pgm.s.idRamRangesGen);
857
858	pgmR3PhysRebuildRamRangeSearchTrees(pVM);
859	pgmUnlock(pVM);
860	}
861
862
863	/**
864	* Unlink an existing RAM range from the list.
865	*
866	* @param pVM Pointer to the VM.
867	* @param pRam Pointer to the new list entry.
868	*/
869	static void pgmR3PhysUnlinkRamRange(PVM pVM, PPGMRAMRANGE pRam)
870	{
871	pgmLock(pVM);
872
873	/* find prev. */
874	PPGMRAMRANGE pPrev = NULL;
875	PPGMRAMRANGE pCur = pVM->pgm.s.pRamRangesXR3;
876	while (pCur != pRam)
877	{
878	pPrev = pCur;
879	pCur = pCur->pNextR3;
880	}
881	AssertFatal(pCur);
882
883	pgmR3PhysUnlinkRamRange2(pVM, pRam, pPrev);
884	pgmUnlock(pVM);
885	}
886
887
888	/**
889	* Frees a range of pages, replacing them with ZERO pages of the specified type.
890	*
891	* @returns VBox status code.
892	* @param pVM Pointer to the VM.
893	* @param pRam The RAM range in which the pages resides.
894	* @param GCPhys The address of the first page.
895	* @param GCPhysLast The address of the last page.
896	* @param uType The page type to replace then with.
897	*/
898	static int pgmR3PhysFreePageRange(PVM pVM, PPGMRAMRANGE pRam, RTGCPHYS GCPhys, RTGCPHYS GCPhysLast, uint8_t uType)
899	{
900	PGM_LOCK_ASSERT_OWNER(pVM);
901	uint32_t cPendingPages = 0;
902	PGMMFREEPAGESREQ pReq;
903	int rc = GMMR3FreePagesPrepare(pVM, &pReq, PGMPHYS_FREE_PAGE_BATCH_SIZE, GMMACCOUNT_BASE);
904	AssertLogRelRCReturn(rc, rc);
905
906	/* Iterate the pages. */
907	PPGMPAGE pPageDst = &pRam->aPages[(GCPhys - pRam->GCPhys) >> PAGE_SHIFT];
908	uint32_t cPagesLeft = ((GCPhysLast - GCPhys) >> PAGE_SHIFT) + 1;
909	while (cPagesLeft-- > 0)
910	{
911	rc = pgmPhysFreePage(pVM, pReq, &cPendingPages, pPageDst, GCPhys);
912	AssertLogRelRCReturn(rc, rc); /* We're done for if this goes wrong. */
913
914	PGM_PAGE_SET_TYPE(pVM, pPageDst, uType);
915
916	GCPhys += PAGE_SIZE;
917	pPageDst++;
918	}
919
920	if (cPendingPages)
921	{
922	rc = GMMR3FreePagesPerform(pVM, pReq, cPendingPages);
923	AssertLogRelRCReturn(rc, rc);
924	}
925	GMMR3FreePagesCleanup(pReq);
926
927	return rc;
928	}
929
930	#if HC_ARCH_BITS == 64 && (defined(RT_OS_WINDOWS) \|\| defined(RT_OS_SOLARIS) \|\| defined(RT_OS_LINUX) \|\| defined(RT_OS_FREEBSD))
931
932	/**
933	* Rendezvous callback used by PGMR3ChangeMemBalloon that changes the memory balloon size
934	*
935	* This is only called on one of the EMTs while the other ones are waiting for
936	* it to complete this function.
937	*
938	* @returns VINF_SUCCESS (VBox strict status code).
939	* @param pVM Pointer to the VM.
940	* @param pVCpu The VMCPU for the EMT we're being called on. Unused.
941	* @param pvUser User parameter
942	*/
943	static DECLCALLBACK(VBOXSTRICTRC) pgmR3PhysChangeMemBalloonRendezvous(PVM pVM, PVMCPU pVCpu, void *pvUser)
944	{
945	uintptr_t paUser = (uintptr_t )pvUser;
946	bool fInflate = !!paUser[0];
947	unsigned cPages = paUser[1];
948	RTGCPHYS paPhysPage = (RTGCPHYS )paUser[2];
949	uint32_t cPendingPages = 0;
950	PGMMFREEPAGESREQ pReq;
951	int rc;
952
953	Log(("pgmR3PhysChangeMemBalloonRendezvous: %s %x pages\n", (fInflate) ? "inflate" : "deflate", cPages));
954	pgmLock(pVM);
955
956	if (fInflate)
957	{
958	/* Flush the PGM pool cache as we might have stale references to pages that we just freed. */
959	pgmR3PoolClearAllRendezvous(pVM, pVCpu, NULL);
960
961	/* Replace pages with ZERO pages. */
962	rc = GMMR3FreePagesPrepare(pVM, &pReq, PGMPHYS_FREE_PAGE_BATCH_SIZE, GMMACCOUNT_BASE);
963	if (RT_FAILURE(rc))
964	{
965	pgmUnlock(pVM);
966	AssertLogRelRC(rc);
967	return rc;
968	}
969
970	/* Iterate the pages. */
971	for (unsigned i = 0; i < cPages; i++)
972	{
973	PPGMPAGE pPage = pgmPhysGetPage(pVM, paPhysPage[i]);
974	if ( pPage == NULL
975	\|\| PGM_PAGE_GET_TYPE(pPage) != PGMPAGETYPE_RAM)
976	{
977	Log(("pgmR3PhysChangeMemBalloonRendezvous: invalid physical page %RGp pPage->u3Type=%d\n", paPhysPage[i], pPage ? PGM_PAGE_GET_TYPE(pPage) : 0));
978	break;
979	}
980
981	LogFlow(("balloon page: %RGp\n", paPhysPage[i]));
982
983	/* Flush the shadow PT if this page was previously used as a guest page table. */
984	pgmPoolFlushPageByGCPhys(pVM, paPhysPage[i]);
985
986	rc = pgmPhysFreePage(pVM, pReq, &cPendingPages, pPage, paPhysPage[i]);
987	if (RT_FAILURE(rc))
988	{
989	pgmUnlock(pVM);
990	AssertLogRelRC(rc);
991	return rc;
992	}
993	Assert(PGM_PAGE_IS_ZERO(pPage));
994	PGM_PAGE_SET_STATE(pVM, pPage, PGM_PAGE_STATE_BALLOONED);
995	}
996
997	if (cPendingPages)
998	{
999	rc = GMMR3FreePagesPerform(pVM, pReq, cPendingPages);
1000	if (RT_FAILURE(rc))
1001	{
1002	pgmUnlock(pVM);
1003	AssertLogRelRC(rc);
1004	return rc;
1005	}
1006	}
1007	GMMR3FreePagesCleanup(pReq);
1008	}
1009	else
1010	{
1011	/* Iterate the pages. */
1012	for (unsigned i = 0; i < cPages; i++)
1013	{
1014	PPGMPAGE pPage = pgmPhysGetPage(pVM, paPhysPage[i]);
1015	AssertBreak(pPage && PGM_PAGE_GET_TYPE(pPage) == PGMPAGETYPE_RAM);
1016
1017	LogFlow(("Free ballooned page: %RGp\n", paPhysPage[i]));
1018
1019	Assert(PGM_PAGE_IS_BALLOONED(pPage));
1020
1021	/* Change back to zero page. */
1022	PGM_PAGE_SET_STATE(pVM, pPage, PGM_PAGE_STATE_ZERO);
1023	}
1024
1025	/* Note that we currently do not map any ballooned pages in our shadow page tables, so no need to flush the pgm pool. */
1026	}
1027
1028	/* Notify GMM about the balloon change. */
1029	rc = GMMR3BalloonedPages(pVM, (fInflate) ? GMMBALLOONACTION_INFLATE : GMMBALLOONACTION_DEFLATE, cPages);
1030	if (RT_SUCCESS(rc))
1031	{
1032	if (!fInflate)
1033	{
1034	Assert(pVM->pgm.s.cBalloonedPages >= cPages);
1035	pVM->pgm.s.cBalloonedPages -= cPages;
1036	}
1037	else
1038	pVM->pgm.s.cBalloonedPages += cPages;
1039	}
1040
1041	pgmUnlock(pVM);
1042
1043	/* Flush the recompiler's TLB as well. */
1044	for (VMCPUID i = 0; i < pVM->cCpus; i++)
1045	CPUMSetChangedFlags(&pVM->aCpus[i], CPUM_CHANGED_GLOBAL_TLB_FLUSH);
1046
1047	AssertLogRelRC(rc);
1048	return rc;
1049	}
1050
1051
1052	/**
1053	* Frees a range of ram pages, replacing them with ZERO pages; helper for PGMR3PhysFreeRamPages
1054	*
1055	* @returns VBox status code.
1056	* @param pVM Pointer to the VM.
1057	* @param fInflate Inflate or deflate memory balloon
1058	* @param cPages Number of pages to free
1059	* @param paPhysPage Array of guest physical addresses
1060	*/
1061	static DECLCALLBACK(void) pgmR3PhysChangeMemBalloonHelper(PVM pVM, bool fInflate, unsigned cPages, RTGCPHYS *paPhysPage)
1062	{
1063	uintptr_t paUser[3];
1064
1065	paUser[0] = fInflate;
1066	paUser[1] = cPages;
1067	paUser[2] = (uintptr_t)paPhysPage;
1068	int rc = VMMR3EmtRendezvous(pVM, VMMEMTRENDEZVOUS_FLAGS_TYPE_ONCE, pgmR3PhysChangeMemBalloonRendezvous, (void *)paUser);
1069	AssertRC(rc);
1070
1071	/* Made a copy in PGMR3PhysFreeRamPages; free it here. */
1072	RTMemFree(paPhysPage);
1073	}
1074
1075	#endif /* 64-bit host && (Windows \|\| Solaris \|\| Linux \|\| FreeBSD) */
1076
1077	/**
1078	* Inflate or deflate a memory balloon
1079	*
1080	* @returns VBox status code.
1081	* @param pVM Pointer to the VM.
1082	* @param fInflate Inflate or deflate memory balloon
1083	* @param cPages Number of pages to free
1084	* @param paPhysPage Array of guest physical addresses
1085	*/
1086	VMMR3DECL(int) PGMR3PhysChangeMemBalloon(PVM pVM, bool fInflate, unsigned cPages, RTGCPHYS *paPhysPage)
1087	{
1088	/* This must match GMMR0Init; currently we only support memory ballooning on all 64-bit hosts except Mac OS X */
1089	#if HC_ARCH_BITS == 64 && (defined(RT_OS_WINDOWS) \|\| defined(RT_OS_SOLARIS) \|\| defined(RT_OS_LINUX) \|\| defined(RT_OS_FREEBSD))
1090	int rc;
1091
1092	/* Older additions (ancient non-functioning balloon code) pass wrong physical addresses. */
1093	AssertReturn(!(paPhysPage[0] & 0xfff), VERR_INVALID_PARAMETER);
1094
1095	/* We own the IOM lock here and could cause a deadlock by waiting for another VCPU that is blocking on the IOM lock.
1096	* In the SMP case we post a request packet to postpone the job.
1097	*/
1098	if (pVM->cCpus > 1)
1099	{
1100	unsigned cbPhysPage = cPages * sizeof(paPhysPage[0]);
1101	RTGCPHYS paPhysPageCopy = (RTGCPHYS )RTMemAlloc(cbPhysPage);
1102	AssertReturn(paPhysPageCopy, VERR_NO_MEMORY);
1103
1104	memcpy(paPhysPageCopy, paPhysPage, cbPhysPage);
1105
1106	rc = VMR3ReqCallNoWait(pVM, VMCPUID_ANY_QUEUE, (PFNRT)pgmR3PhysChangeMemBalloonHelper, 4, pVM, fInflate, cPages, paPhysPageCopy);
1107	AssertRC(rc);
1108	}
1109	else
1110	{
1111	uintptr_t paUser[3];
1112
1113	paUser[0] = fInflate;
1114	paUser[1] = cPages;
1115	paUser[2] = (uintptr_t)paPhysPage;
1116	rc = VMMR3EmtRendezvous(pVM, VMMEMTRENDEZVOUS_FLAGS_TYPE_ONCE, pgmR3PhysChangeMemBalloonRendezvous, (void *)paUser);
1117	AssertRC(rc);
1118	}
1119	return rc;
1120
1121	#else
1122	NOREF(pVM); NOREF(fInflate); NOREF(cPages); NOREF(paPhysPage);
1123	return VERR_NOT_IMPLEMENTED;
1124	#endif
1125	}
1126
1127
1128	/**
1129	* Rendezvous callback used by PGMR3WriteProtectRAM that write protects all
1130	* physical RAM.
1131	*
1132	* This is only called on one of the EMTs while the other ones are waiting for
1133	* it to complete this function.
1134	*
1135	* @returns VINF_SUCCESS (VBox strict status code).
1136	* @param pVM Pointer to the VM.
1137	* @param pVCpu The VMCPU for the EMT we're being called on. Unused.
1138	* @param pvUser User parameter, unused.
1139	*/
1140	static DECLCALLBACK(VBOXSTRICTRC) pgmR3PhysWriteProtectRAMRendezvous(PVM pVM, PVMCPU pVCpu, void *pvUser)
1141	{
1142	int rc = VINF_SUCCESS;
1143	NOREF(pvUser); NOREF(pVCpu);
1144
1145	pgmLock(pVM);
1146	#ifdef PGMPOOL_WITH_OPTIMIZED_DIRTY_PT
1147	pgmPoolResetDirtyPages(pVM);
1148	#endif
1149
1150	/** @todo pointless to write protect the physical page pointed to by RSP. */
1151
1152	for (PPGMRAMRANGE pRam = pVM->pgm.s.CTX_SUFF(pRamRangesX);
1153	pRam;
1154	pRam = pRam->CTX_SUFF(pNext))
1155	{
1156	uint32_t cPages = pRam->cb >> PAGE_SHIFT;
1157	for (uint32_t iPage = 0; iPage < cPages; iPage++)
1158	{
1159	PPGMPAGE pPage = &pRam->aPages[iPage];
1160	PGMPAGETYPE enmPageType = (PGMPAGETYPE)PGM_PAGE_GET_TYPE(pPage);
1161
1162	if ( RT_LIKELY(enmPageType == PGMPAGETYPE_RAM)
1163	\|\| enmPageType == PGMPAGETYPE_MMIO2)
1164	{
1165	/*
1166	* A RAM page.
1167	*/
1168	switch (PGM_PAGE_GET_STATE(pPage))
1169	{
1170	case PGM_PAGE_STATE_ALLOCATED:
1171	/** @todo Optimize this: Don't always re-enable write
1172	* monitoring if the page is known to be very busy. */
1173	if (PGM_PAGE_IS_WRITTEN_TO(pPage))
1174	{
1175	PGM_PAGE_CLEAR_WRITTEN_TO(pVM, pPage);
1176	/* Remember this dirty page for the next (memory) sync. */
1177	PGM_PAGE_SET_FT_DIRTY(pPage);
1178	}
1179
1180	pgmPhysPageWriteMonitor(pVM, pPage, pRam->GCPhys + ((RTGCPHYS)iPage << PAGE_SHIFT));
1181	break;
1182
1183	case PGM_PAGE_STATE_SHARED:
1184	AssertFailed();
1185	break;
1186
1187	case PGM_PAGE_STATE_WRITE_MONITORED: /* nothing to change. */
1188	default:
1189	break;
1190	}
1191	}
1192	}
1193	}
1194	pgmR3PoolWriteProtectPages(pVM);
1195	PGM_INVL_ALL_VCPU_TLBS(pVM);
1196	for (VMCPUID idCpu = 0; idCpu < pVM->cCpus; idCpu++)
1197	CPUMSetChangedFlags(&pVM->aCpus[idCpu], CPUM_CHANGED_GLOBAL_TLB_FLUSH);
1198
1199	pgmUnlock(pVM);
1200	return rc;
1201	}
1202
1203	/**
1204	* Protect all physical RAM to monitor writes
1205	*
1206	* @returns VBox status code.
1207	* @param pVM Pointer to the VM.
1208	*/
1209	VMMR3DECL(int) PGMR3PhysWriteProtectRAM(PVM pVM)
1210	{
1211	VM_ASSERT_EMT_RETURN(pVM, VERR_VM_THREAD_NOT_EMT);
1212
1213	int rc = VMMR3EmtRendezvous(pVM, VMMEMTRENDEZVOUS_FLAGS_TYPE_ONCE, pgmR3PhysWriteProtectRAMRendezvous, NULL);
1214	AssertRC(rc);
1215	return rc;
1216	}
1217
1218	/**
1219	* Enumerate all dirty FT pages.
1220	*
1221	* @returns VBox status code.
1222	* @param pVM Pointer to the VM.
1223	* @param pfnEnum Enumerate callback handler.
1224	* @param pvUser Enumerate callback handler parameter.
1225	*/
1226	VMMR3DECL(int) PGMR3PhysEnumDirtyFTPages(PVM pVM, PFNPGMENUMDIRTYFTPAGES pfnEnum, void *pvUser)
1227	{
1228	int rc = VINF_SUCCESS;
1229
1230	pgmLock(pVM);
1231	for (PPGMRAMRANGE pRam = pVM->pgm.s.CTX_SUFF(pRamRangesX);
1232	pRam;
1233	pRam = pRam->CTX_SUFF(pNext))
1234	{
1235	uint32_t cPages = pRam->cb >> PAGE_SHIFT;
1236	for (uint32_t iPage = 0; iPage < cPages; iPage++)
1237	{
1238	PPGMPAGE pPage = &pRam->aPages[iPage];
1239	PGMPAGETYPE enmPageType = (PGMPAGETYPE)PGM_PAGE_GET_TYPE(pPage);
1240
1241	if ( RT_LIKELY(enmPageType == PGMPAGETYPE_RAM)
1242	\|\| enmPageType == PGMPAGETYPE_MMIO2)
1243	{
1244	/*
1245	* A RAM page.
1246	*/
1247	switch (PGM_PAGE_GET_STATE(pPage))
1248	{
1249	case PGM_PAGE_STATE_ALLOCATED:
1250	case PGM_PAGE_STATE_WRITE_MONITORED:
1251	if ( !PGM_PAGE_IS_WRITTEN_TO(pPage) /* not very recently updated? */
1252	&& PGM_PAGE_IS_FT_DIRTY(pPage))
1253	{
1254	unsigned cbPageRange = PAGE_SIZE;
1255	unsigned iPageClean = iPage + 1;
1256	RTGCPHYS GCPhysPage = pRam->GCPhys + iPage * PAGE_SIZE;
1257	uint8_t *pu8Page = NULL;
1258	PGMPAGEMAPLOCK Lock;
1259
1260	/* Find the next clean page, so we can merge adjacent dirty pages. */
1261	for (; iPageClean < cPages; iPageClean++)
1262	{
1263	PPGMPAGE pPageNext = &pRam->aPages[iPageClean];
1264	if ( RT_UNLIKELY(PGM_PAGE_GET_TYPE(pPageNext) != PGMPAGETYPE_RAM)
1265	\|\| PGM_PAGE_GET_STATE(pPageNext) != PGM_PAGE_STATE_ALLOCATED
1266	\|\| PGM_PAGE_IS_WRITTEN_TO(pPageNext)
1267	\|\| !PGM_PAGE_IS_FT_DIRTY(pPageNext)
1268	/* Crossing a chunk boundary? */
1269	\|\| (GCPhysPage & GMM_PAGEID_IDX_MASK) != ((GCPhysPage + cbPageRange) & GMM_PAGEID_IDX_MASK)
1270	)
1271	break;
1272
1273	cbPageRange += PAGE_SIZE;
1274	}
1275
1276	rc = PGMPhysGCPhys2CCPtrReadOnly(pVM, GCPhysPage, (const void **)&pu8Page, &Lock);
1277	if (RT_SUCCESS(rc))
1278	{
1279	/** @todo this is risky; the range might be changed, but little choice as the sync
1280	* costs a lot of time. */
1281	pgmUnlock(pVM);
1282	pfnEnum(pVM, GCPhysPage, pu8Page, cbPageRange, pvUser);
1283	pgmLock(pVM);
1284	PGMPhysReleasePageMappingLock(pVM, &Lock);
1285	}
1286
1287	for (iPage; iPage < iPageClean; iPage++)
1288	PGM_PAGE_CLEAR_FT_DIRTY(&pRam->aPages[iPage]);
1289
1290	iPage = iPageClean - 1;
1291	}
1292	break;
1293	}
1294	}
1295	}
1296	}
1297	pgmUnlock(pVM);
1298	return rc;
1299	}
1300
1301
1302	/**
1303	* Gets the number of ram ranges.
1304	*
1305	* @returns Number of ram ranges. Returns UINT32_MAX if @a pVM is invalid.
1306	* @param pVM Pointer to the VM.
1307	*/
1308	VMMR3DECL(uint32_t) PGMR3PhysGetRamRangeCount(PVM pVM)
1309	{
1310	VM_ASSERT_VALID_EXT_RETURN(pVM, UINT32_MAX);
1311
1312	pgmLock(pVM);
1313	uint32_t cRamRanges = 0;
1314	for (PPGMRAMRANGE pCur = pVM->pgm.s.CTX_SUFF(pRamRangesX); pCur; pCur = pCur->CTX_SUFF(pNext))
1315	cRamRanges++;
1316	pgmUnlock(pVM);
1317	return cRamRanges;
1318	}
1319
1320
1321	/**
1322	* Get information about a range.
1323	*
1324	* @returns VINF_SUCCESS or VERR_OUT_OF_RANGE.
1325	* @param pVM Pointer to the VM.
1326	* @param iRange The ordinal of the range.
1327	* @param pGCPhysStart Where to return the start of the range. Optional.
1328	* @param pGCPhysLast Where to return the address of the last byte in the
1329	* range. Optional.
1330	* @param pfIsMmio Where to indicate that this is a pure MMIO range.
1331	* Optional.
1332	*/
1333	VMMR3DECL(int) PGMR3PhysGetRange(PVM pVM, uint32_t iRange, PRTGCPHYS pGCPhysStart, PRTGCPHYS pGCPhysLast,
1334	const char *ppszDesc, bool pfIsMmio)
1335	{
1336	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
1337
1338	pgmLock(pVM);
1339	uint32_t iCurRange = 0;
1340	for (PPGMRAMRANGE pCur = pVM->pgm.s.CTX_SUFF(pRamRangesX); pCur; pCur = pCur->CTX_SUFF(pNext), iCurRange++)
1341	if (iCurRange == iRange)
1342	{
1343	if (pGCPhysStart)
1344	*pGCPhysStart = pCur->GCPhys;
1345	if (pGCPhysLast)
1346	*pGCPhysLast = pCur->GCPhysLast;
1347	if (ppszDesc)
1348	*ppszDesc = pCur->pszDesc;
1349	if (pfIsMmio)
1350	*pfIsMmio = !!(pCur->fFlags & PGM_RAM_RANGE_FLAGS_AD_HOC_MMIO);
1351
1352	pgmUnlock(pVM);
1353	return VINF_SUCCESS;
1354	}
1355	pgmUnlock(pVM);
1356	return VERR_OUT_OF_RANGE;
1357	}
1358
1359
1360	/**
1361	* Query the amount of free memory inside VMMR0
1362	*
1363	* @returns VBox status code.
1364	* @param pUVM The user mode VM handle.
1365	* @param pcbAllocMem Where to return the amount of memory allocated
1366	* by VMs.
1367	* @param pcbFreeMem Where to return the amount of memory that is
1368	* allocated from the host but not currently used
1369	* by any VMs.
1370	* @param pcbBallonedMem Where to return the sum of memory that is
1371	* currently ballooned by the VMs.
1372	* @param pcbSharedMem Where to return the amount of memory that is
1373	* currently shared.
1374	*/
1375	VMMR3DECL(int) PGMR3QueryGlobalMemoryStats(PUVM pUVM, uint64_t pcbAllocMem, uint64_t pcbFreeMem,
1376	uint64_t pcbBallonedMem, uint64_t pcbSharedMem)
1377	{
1378	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
1379	VM_ASSERT_VALID_EXT_RETURN(pUVM->pVM, VERR_INVALID_VM_HANDLE);
1380
1381	uint64_t cAllocPages = 0;
1382	uint64_t cFreePages = 0;
1383	uint64_t cBalloonPages = 0;
1384	uint64_t cSharedPages = 0;
1385	int rc = GMMR3QueryHypervisorMemoryStats(pUVM->pVM, &cAllocPages, &cFreePages, &cBalloonPages, &cSharedPages);
1386	AssertRCReturn(rc, rc);
1387
1388	if (pcbAllocMem)
1389	pcbAllocMem = cAllocPages _4K;
1390
1391	if (pcbFreeMem)
1392	pcbFreeMem = cFreePages _4K;
1393
1394	if (pcbBallonedMem)
1395	pcbBallonedMem = cBalloonPages _4K;
1396
1397	if (pcbSharedMem)
1398	pcbSharedMem = cSharedPages _4K;
1399
1400	Log(("PGMR3QueryVMMMemoryStats: all=%llx free=%llx ballooned=%llx shared=%llx\n",
1401	cAllocPages, cFreePages, cBalloonPages, cSharedPages));
1402	return VINF_SUCCESS;
1403	}
1404
1405
1406	/**
1407	* Query memory stats for the VM.
1408	*
1409	* @returns VBox status code.
1410	* @param pUVM The user mode VM handle.
1411	* @param pcbTotalMem Where to return total amount memory the VM may
1412	* possibly use.
1413	* @param pcbPrivateMem Where to return the amount of private memory
1414	* currently allocated.
1415	* @param pcbSharedMem Where to return the amount of actually shared
1416	* memory currently used by the VM.
1417	* @param pcbZeroMem Where to return the amount of memory backed by
1418	* zero pages.
1419	*
1420	* @remarks The total mem is normally larger than the sum of the three
1421	* components. There are two reasons for this, first the amount of
1422	* shared memory is what we're sure is shared instead of what could
1423	* possibly be shared with someone. Secondly, because the total may
1424	* include some pure MMIO pages that doesn't go into any of the three
1425	* sub-counts.
1426	*
1427	* @todo Why do we return reused shared pages instead of anything that could
1428	* potentially be shared? Doesn't this mean the first VM gets a much
1429	* lower number of shared pages?
1430	*/
1431	VMMR3DECL(int) PGMR3QueryMemoryStats(PUVM pUVM, uint64_t pcbTotalMem, uint64_t pcbPrivateMem,
1432	uint64_t pcbSharedMem, uint64_t pcbZeroMem)
1433	{
1434	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
1435	PVM pVM = pUVM->pVM;
1436	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
1437
1438	if (pcbTotalMem)
1439	pcbTotalMem = (uint64_t)pVM->pgm.s.cAllPages PAGE_SIZE;
1440
1441	if (pcbPrivateMem)
1442	pcbPrivateMem = (uint64_t)pVM->pgm.s.cPrivatePages PAGE_SIZE;
1443
1444	if (pcbSharedMem)
1445	pcbSharedMem = (uint64_t)pVM->pgm.s.cReusedSharedPages PAGE_SIZE;
1446
1447	if (pcbZeroMem)
1448	pcbZeroMem = (uint64_t)pVM->pgm.s.cZeroPages PAGE_SIZE;
1449
1450	Log(("PGMR3QueryMemoryStats: all=%x private=%x reused=%x zero=%x\n", pVM->pgm.s.cAllPages, pVM->pgm.s.cPrivatePages, pVM->pgm.s.cReusedSharedPages, pVM->pgm.s.cZeroPages));
1451	return VINF_SUCCESS;
1452	}
1453
1454
1455	/**
1456	* PGMR3PhysRegisterRam worker that initializes and links a RAM range.
1457	*
1458	* @param pVM Pointer to the VM.
1459	* @param pNew The new RAM range.
1460	* @param GCPhys The address of the RAM range.
1461	* @param GCPhysLast The last address of the RAM range.
1462	* @param RCPtrNew The RC address if the range is floating. NIL_RTRCPTR
1463	* if in HMA.
1464	* @param R0PtrNew Ditto for R0.
1465	* @param pszDesc The description.
1466	* @param pPrev The previous RAM range (for linking).
1467	*/
1468	static void pgmR3PhysInitAndLinkRamRange(PVM pVM, PPGMRAMRANGE pNew, RTGCPHYS GCPhys, RTGCPHYS GCPhysLast,
1469	RTRCPTR RCPtrNew, RTR0PTR R0PtrNew, const char *pszDesc, PPGMRAMRANGE pPrev)
1470	{
1471	/*
1472	* Initialize the range.
1473	*/
1474	pNew->pSelfR0 = R0PtrNew != NIL_RTR0PTR ? R0PtrNew : MMHyperCCToR0(pVM, pNew);
1475	pNew->pSelfRC = RCPtrNew != NIL_RTRCPTR ? RCPtrNew : MMHyperCCToRC(pVM, pNew);
1476	pNew->GCPhys = GCPhys;
1477	pNew->GCPhysLast = GCPhysLast;
1478	pNew->cb = GCPhysLast - GCPhys + 1;
1479	pNew->pszDesc = pszDesc;
1480	pNew->fFlags = RCPtrNew != NIL_RTRCPTR ? PGM_RAM_RANGE_FLAGS_FLOATING : 0;
1481	pNew->pvR3 = NULL;
1482	pNew->paLSPages = NULL;
1483
1484	uint32_t const cPages = pNew->cb >> PAGE_SHIFT;
1485	RTGCPHYS iPage = cPages;
1486	while (iPage-- > 0)
1487	PGM_PAGE_INIT_ZERO(&pNew->aPages[iPage], pVM, PGMPAGETYPE_RAM);
1488
1489	/* Update the page count stats. */
1490	pVM->pgm.s.cZeroPages += cPages;
1491	pVM->pgm.s.cAllPages += cPages;
1492
1493	/*
1494	* Link it.
1495	*/
1496	pgmR3PhysLinkRamRange(pVM, pNew, pPrev);
1497	}
1498
1499
1500	/**
1501	* Relocate a floating RAM range.
1502	*
1503	* @copydoc FNPGMRELOCATE.
1504	*/
1505	static DECLCALLBACK(bool) pgmR3PhysRamRangeRelocate(PVM pVM, RTGCPTR GCPtrOld, RTGCPTR GCPtrNew, PGMRELOCATECALL enmMode, void *pvUser)
1506	{
1507	PPGMRAMRANGE pRam = (PPGMRAMRANGE)pvUser;
1508	Assert(pRam->fFlags & PGM_RAM_RANGE_FLAGS_FLOATING);
1509	Assert(pRam->pSelfRC == GCPtrOld + PAGE_SIZE);
1510
1511	switch (enmMode)
1512	{
1513	case PGMRELOCATECALL_SUGGEST:
1514	return true;
1515
1516	case PGMRELOCATECALL_RELOCATE:
1517	{
1518	/*
1519	* Update myself, then relink all the ranges and flush the RC TLB.
1520	*/
1521	pgmLock(pVM);
1522
1523	pRam->pSelfRC = (RTRCPTR)(GCPtrNew + PAGE_SIZE);
1524
1525	pgmR3PhysRelinkRamRanges(pVM);
1526	for (unsigned i = 0; i < PGM_RAMRANGE_TLB_ENTRIES; i++)
1527	pVM->pgm.s.apRamRangesTlbRC[i] = NIL_RTRCPTR;
1528
1529	pgmUnlock(pVM);
1530	return true;
1531	}
1532
1533	default:
1534	AssertFailedReturn(false);
1535	}
1536	}
1537
1538
1539	/**
1540	* PGMR3PhysRegisterRam worker that registers a high chunk.
1541	*
1542	* @returns VBox status code.
1543	* @param pVM Pointer to the VM.
1544	* @param GCPhys The address of the RAM.
1545	* @param cRamPages The number of RAM pages to register.
1546	* @param cbChunk The size of the PGMRAMRANGE guest mapping.
1547	* @param iChunk The chunk number.
1548	* @param pszDesc The RAM range description.
1549	* @param ppPrev Previous RAM range pointer. In/Out.
1550	*/
1551	static int pgmR3PhysRegisterHighRamChunk(PVM pVM, RTGCPHYS GCPhys, uint32_t cRamPages,
1552	uint32_t cbChunk, uint32_t iChunk, const char *pszDesc,
1553	PPGMRAMRANGE *ppPrev)
1554	{
1555	const char *pszDescChunk = iChunk == 0
1556	? pszDesc
1557	: MMR3HeapAPrintf(pVM, MM_TAG_PGM_PHYS, "%s (#%u)", pszDesc, iChunk + 1);
1558	AssertReturn(pszDescChunk, VERR_NO_MEMORY);
1559
1560	/*
1561	* Allocate memory for the new chunk.
1562	*/
1563	size_t const cChunkPages = RT_ALIGN_Z(RT_UOFFSETOF(PGMRAMRANGE, aPages[cRamPages]), PAGE_SIZE) >> PAGE_SHIFT;
1564	PSUPPAGE paChunkPages = (PSUPPAGE)RTMemTmpAllocZ(sizeof(SUPPAGE) * cChunkPages);
1565	AssertReturn(paChunkPages, VERR_NO_TMP_MEMORY);
1566	RTR0PTR R0PtrChunk = NIL_RTR0PTR;
1567	void *pvChunk = NULL;
1568	int rc = SUPR3PageAllocEx(cChunkPages, 0 /fFlags/, &pvChunk,
1569	#ifdef VBOX_WITH_2X_4GB_ADDR_SPACE
1570	HMIsEnabled(pVM) ? &R0PtrChunk : NULL,
1571	#else
1572	NULL,
1573	#endif
1574	paChunkPages);
1575	if (RT_SUCCESS(rc))
1576	{
1577	#ifdef VBOX_WITH_2X_4GB_ADDR_SPACE
1578	if (!HMIsEnabled(pVM))
1579	R0PtrChunk = NIL_RTR0PTR;
1580	#else
1581	R0PtrChunk = (uintptr_t)pvChunk;
1582	#endif
1583	memset(pvChunk, 0, cChunkPages << PAGE_SHIFT);
1584
1585	PPGMRAMRANGE pNew = (PPGMRAMRANGE)pvChunk;
1586
1587	/*
1588	* Create a mapping and map the pages into it.
1589	* We push these in below the HMA.
1590	*/
1591	RTGCPTR GCPtrChunkMap = pVM->pgm.s.GCPtrPrevRamRangeMapping - cbChunk;
1592	rc = PGMR3MapPT(pVM, GCPtrChunkMap, cbChunk, 0 /fFlags/, pgmR3PhysRamRangeRelocate, pNew, pszDescChunk);
1593	if (RT_SUCCESS(rc))
1594	{
1595	pVM->pgm.s.GCPtrPrevRamRangeMapping = GCPtrChunkMap;
1596
1597	RTGCPTR const GCPtrChunk = GCPtrChunkMap + PAGE_SIZE;
1598	RTGCPTR GCPtrPage = GCPtrChunk;
1599	for (uint32_t iPage = 0; iPage < cChunkPages && RT_SUCCESS(rc); iPage++, GCPtrPage += PAGE_SIZE)
1600	rc = PGMMap(pVM, GCPtrPage, paChunkPages[iPage].Phys, PAGE_SIZE, 0);
1601	if (RT_SUCCESS(rc))
1602	{
1603	/*
1604	* Ok, init and link the range.
1605	*/
1606	pgmR3PhysInitAndLinkRamRange(pVM, pNew, GCPhys, GCPhys + ((RTGCPHYS)cRamPages << PAGE_SHIFT) - 1,
1607	(RTRCPTR)GCPtrChunk, R0PtrChunk, pszDescChunk, *ppPrev);
1608	*ppPrev = pNew;
1609	}
1610	}
1611
1612	if (RT_FAILURE(rc))
1613	SUPR3PageFreeEx(pvChunk, cChunkPages);
1614	}
1615
1616	RTMemTmpFree(paChunkPages);
1617	return rc;
1618	}
1619
1620
1621	/**
1622	* Sets up a range RAM.
1623	*
1624	* This will check for conflicting registrations, make a resource
1625	* reservation for the memory (with GMM), and setup the per-page
1626	* tracking structures (PGMPAGE).
1627	*
1628	* @returns VBox status code.
1629	* @param pVM Pointer to the VM.
1630	* @param GCPhys The physical address of the RAM.
1631	* @param cb The size of the RAM.
1632	* @param pszDesc The description - not copied, so, don't free or change it.
1633	*/
1634	VMMR3DECL(int) PGMR3PhysRegisterRam(PVM pVM, RTGCPHYS GCPhys, RTGCPHYS cb, const char *pszDesc)
1635	{
1636	/*
1637	* Validate input.
1638	*/
1639	Log(("PGMR3PhysRegisterRam: GCPhys=%RGp cb=%RGp pszDesc=%s\n", GCPhys, cb, pszDesc));
1640	AssertReturn(RT_ALIGN_T(GCPhys, PAGE_SIZE, RTGCPHYS) == GCPhys, VERR_INVALID_PARAMETER);
1641	AssertReturn(RT_ALIGN_T(cb, PAGE_SIZE, RTGCPHYS) == cb, VERR_INVALID_PARAMETER);
1642	AssertReturn(cb > 0, VERR_INVALID_PARAMETER);
1643	RTGCPHYS GCPhysLast = GCPhys + (cb - 1);
1644	AssertMsgReturn(GCPhysLast > GCPhys, ("The range wraps! GCPhys=%RGp cb=%RGp\n", GCPhys, cb), VERR_INVALID_PARAMETER);
1645	AssertPtrReturn(pszDesc, VERR_INVALID_POINTER);
1646	VM_ASSERT_EMT_RETURN(pVM, VERR_VM_THREAD_NOT_EMT);
1647
1648	pgmLock(pVM);
1649
1650	/*
1651	* Find range location and check for conflicts.
1652	* (We don't lock here because the locking by EMT is only required on update.)
1653	*/
1654	PPGMRAMRANGE pPrev = NULL;
1655	PPGMRAMRANGE pRam = pVM->pgm.s.pRamRangesXR3;
1656	while (pRam && GCPhysLast >= pRam->GCPhys)
1657	{
1658	if ( GCPhysLast >= pRam->GCPhys
1659	&& GCPhys <= pRam->GCPhysLast)
1660	AssertLogRelMsgFailedReturn(("%RGp-%RGp (%s) conflicts with existing %RGp-%RGp (%s)\n",
1661	GCPhys, GCPhysLast, pszDesc,
1662	pRam->GCPhys, pRam->GCPhysLast, pRam->pszDesc),
1663	VERR_PGM_RAM_CONFLICT);
1664
1665	/* next */
1666	pPrev = pRam;
1667	pRam = pRam->pNextR3;
1668	}
1669
1670	/*
1671	* Register it with GMM (the API bitches).
1672	*/
1673	const RTGCPHYS cPages = cb >> PAGE_SHIFT;
1674	int rc = MMR3IncreaseBaseReservation(pVM, cPages);
1675	if (RT_FAILURE(rc))
1676	{
1677	pgmUnlock(pVM);
1678	return rc;
1679	}
1680
1681	if ( GCPhys >= _4G
1682	&& cPages > 256)
1683	{
1684	/*
1685	* The PGMRAMRANGE structures for the high memory can get very big.
1686	* In order to avoid SUPR3PageAllocEx allocation failures due to the
1687	* allocation size limit there and also to avoid being unable to find
1688	* guest mapping space for them, we split this memory up into 4MB in
1689	* (potential) raw-mode configs and 16MB chunks in forced AMD-V/VT-x
1690	* mode.
1691	*
1692	* The first and last page of each mapping are guard pages and marked
1693	* not-present. So, we've got 4186112 and 16769024 bytes available for
1694	* the PGMRAMRANGE structure.
1695	*
1696	* Note! The sizes used here will influence the saved state.
1697	*/
1698	uint32_t cbChunk;
1699	uint32_t cPagesPerChunk;
1700	if (HMIsEnabled(pVM))
1701	{
1702	cbChunk = 16U*_1M;
1703	cPagesPerChunk = 1048048; /* max ~1048059 */
1704	AssertCompile(sizeof(PGMRAMRANGE) + sizeof(PGMPAGE) * 1048048 < 16U_1M - PAGE_SIZE 2);
1705	}
1706	else
1707	{
1708	cbChunk = 4U*_1M;
1709	cPagesPerChunk = 261616; /* max ~261627 */
1710	AssertCompile(sizeof(PGMRAMRANGE) + sizeof(PGMPAGE) * 261616 < 4U_1M - PAGE_SIZE 2);
1711	}
1712	AssertRelease(RT_UOFFSETOF(PGMRAMRANGE, aPages[cPagesPerChunk]) + PAGE_SIZE * 2 <= cbChunk);
1713
1714	RTGCPHYS cPagesLeft = cPages;
1715	RTGCPHYS GCPhysChunk = GCPhys;
1716	uint32_t iChunk = 0;
1717	while (cPagesLeft > 0)
1718	{
1719	uint32_t cPagesInChunk = cPagesLeft;
1720	if (cPagesInChunk > cPagesPerChunk)
1721	cPagesInChunk = cPagesPerChunk;
1722
1723	rc = pgmR3PhysRegisterHighRamChunk(pVM, GCPhysChunk, cPagesInChunk, cbChunk, iChunk, pszDesc, &pPrev);
1724	AssertRCReturn(rc, rc);
1725
1726	/* advance */
1727	GCPhysChunk += (RTGCPHYS)cPagesInChunk << PAGE_SHIFT;
1728	cPagesLeft -= cPagesInChunk;
1729	iChunk++;
1730	}
1731	}
1732	else
1733	{
1734	/*
1735	* Allocate, initialize and link the new RAM range.
1736	*/
1737	const size_t cbRamRange = RT_OFFSETOF(PGMRAMRANGE, aPages[cPages]);
1738	PPGMRAMRANGE pNew;
1739	rc = MMR3HyperAllocOnceNoRel(pVM, cbRamRange, 0, MM_TAG_PGM_PHYS, (void **)&pNew);
1740	AssertLogRelMsgRCReturn(rc, ("cbRamRange=%zu\n", cbRamRange), rc);
1741
1742	pgmR3PhysInitAndLinkRamRange(pVM, pNew, GCPhys, GCPhysLast, NIL_RTRCPTR, NIL_RTR0PTR, pszDesc, pPrev);
1743	}
1744	pgmPhysInvalidatePageMapTLB(pVM);
1745	pgmUnlock(pVM);
1746
1747	#ifdef VBOX_WITH_REM
1748	/*
1749	* Notify REM.
1750	*/
1751	REMR3NotifyPhysRamRegister(pVM, GCPhys, cb, REM_NOTIFY_PHYS_RAM_FLAGS_RAM);
1752	#endif
1753
1754	return VINF_SUCCESS;
1755	}
1756
1757
1758	/**
1759	* Worker called by PGMR3InitFinalize if we're configured to pre-allocate RAM.
1760	*
1761	* We do this late in the init process so that all the ROM and MMIO ranges have
1762	* been registered already and we don't go wasting memory on them.
1763	*
1764	* @returns VBox status code.
1765	*
1766	* @param pVM Pointer to the VM.
1767	*/
1768	int pgmR3PhysRamPreAllocate(PVM pVM)
1769	{
1770	Assert(pVM->pgm.s.fRamPreAlloc);
1771	Log(("pgmR3PhysRamPreAllocate: enter\n"));
1772
1773	/*
1774	* Walk the RAM ranges and allocate all RAM pages, halt at
1775	* the first allocation error.
1776	*/
1777	uint64_t cPages = 0;
1778	uint64_t NanoTS = RTTimeNanoTS();
1779	pgmLock(pVM);
1780	for (PPGMRAMRANGE pRam = pVM->pgm.s.pRamRangesXR3; pRam; pRam = pRam->pNextR3)
1781	{
1782	PPGMPAGE pPage = &pRam->aPages[0];
1783	RTGCPHYS GCPhys = pRam->GCPhys;
1784	uint32_t cLeft = pRam->cb >> PAGE_SHIFT;
1785	while (cLeft-- > 0)
1786	{
1787	if (PGM_PAGE_GET_TYPE(pPage) == PGMPAGETYPE_RAM)
1788	{
1789	switch (PGM_PAGE_GET_STATE(pPage))
1790	{
1791	case PGM_PAGE_STATE_ZERO:
1792	{
1793	int rc = pgmPhysAllocPage(pVM, pPage, GCPhys);
1794	if (RT_FAILURE(rc))
1795	{
1796	LogRel(("PGM: RAM Pre-allocation failed at %RGp (in %s) with rc=%Rrc\n", GCPhys, pRam->pszDesc, rc));
1797	pgmUnlock(pVM);
1798	return rc;
1799	}
1800	cPages++;
1801	break;
1802	}
1803
1804	case PGM_PAGE_STATE_BALLOONED:
1805	case PGM_PAGE_STATE_ALLOCATED:
1806	case PGM_PAGE_STATE_WRITE_MONITORED:
1807	case PGM_PAGE_STATE_SHARED:
1808	/* nothing to do here. */
1809	break;
1810	}
1811	}
1812
1813	/* next */
1814	pPage++;
1815	GCPhys += PAGE_SIZE;
1816	}
1817	}
1818	pgmUnlock(pVM);
1819	NanoTS = RTTimeNanoTS() - NanoTS;
1820
1821	LogRel(("PGM: Pre-allocated %llu pages in %llu ms\n", cPages, NanoTS / 1000000));
1822	Log(("pgmR3PhysRamPreAllocate: returns VINF_SUCCESS\n"));
1823	return VINF_SUCCESS;
1824	}
1825
1826
1827	/**
1828	* Checks shared page checksums.
1829	*
1830	* @param pVM Pointer to the shared VM structure.
1831	*/
1832	void pgmR3PhysAssertSharedPageChecksums(PVM pVM)
1833	{
1834	#ifdef VBOX_STRICT
1835	pgmLock(pVM);
1836
1837	if (pVM->pgm.s.cSharedPages > 0)
1838	{
1839	/*
1840	* Walk the ram ranges.
1841	*/
1842	for (PPGMRAMRANGE pRam = pVM->pgm.s.pRamRangesXR3; pRam; pRam = pRam->pNextR3)
1843	{
1844	uint32_t iPage = pRam->cb >> PAGE_SHIFT;
1845	AssertMsg(((RTGCPHYS)iPage << PAGE_SHIFT) == pRam->cb, ("%RGp %RGp\n", (RTGCPHYS)iPage << PAGE_SHIFT, pRam->cb));
1846
1847	while (iPage-- > 0)
1848	{
1849	PPGMPAGE pPage = &pRam->aPages[iPage];
1850	if (PGM_PAGE_IS_SHARED(pPage))
1851	{
1852	uint32_t u32Checksum = pPage->s.u2Unused0 \| ((uint32_t)pPage->s.u2Unused1 << 8);
1853	if (!u32Checksum)
1854	{
1855	RTGCPHYS GCPhysPage = pRam->GCPhys + ((RTGCPHYS)iPage << PAGE_SHIFT);
1856	void const *pvPage;
1857	int rc = pgmPhysPageMapReadOnly(pVM, pPage, GCPhysPage, &pvPage);
1858	if (RT_SUCCESS(rc))
1859	{
1860	uint32_t u32Checksum2 = RTCrc32(pvPage, PAGE_SIZE);
1861	# if 0
1862	AssertMsg((u32Checksum2 & UINT32_C(0x00000303)) == u32Checksum, ("GCPhysPage=%RGp\n", GCPhysPage));
1863	# else
1864	if ((u32Checksum2 & UINT32_C(0x00000303)) == u32Checksum)
1865	LogFlow(("shpg %#x @ %RGp %#x [OK]\n", PGM_PAGE_GET_PAGEID(pPage), GCPhysPage, u32Checksum2));
1866	else
1867	AssertMsgFailed(("shpg %#x @ %RGp %#x\n", PGM_PAGE_GET_PAGEID(pPage), GCPhysPage, u32Checksum2));
1868	# endif
1869	}
1870	else
1871	AssertRC(rc);
1872	}
1873	}
1874
1875	} /* for each page */
1876
1877	} /* for each ram range */
1878	}
1879
1880	pgmUnlock(pVM);
1881	#endif /* VBOX_STRICT */
1882	NOREF(pVM);
1883	}
1884
1885
1886	/**
1887	* Resets the physical memory state.
1888	*
1889	* ASSUMES that the caller owns the PGM lock.
1890	*
1891	* @returns VBox status code.
1892	* @param pVM Pointer to the VM.
1893	*/
1894	int pgmR3PhysRamReset(PVM pVM)
1895	{
1896	PGM_LOCK_ASSERT_OWNER(pVM);
1897
1898	/* Reset the memory balloon. */
1899	int rc = GMMR3BalloonedPages(pVM, GMMBALLOONACTION_RESET, 0);
1900	AssertRC(rc);
1901
1902	#ifdef VBOX_WITH_PAGE_SHARING
1903	/* Clear all registered shared modules. */
1904	pgmR3PhysAssertSharedPageChecksums(pVM);
1905	rc = GMMR3ResetSharedModules(pVM);
1906	AssertRC(rc);
1907	#endif
1908	/* Reset counters. */
1909	pVM->pgm.s.cReusedSharedPages = 0;
1910	pVM->pgm.s.cBalloonedPages = 0;
1911
1912	return VINF_SUCCESS;
1913	}
1914
1915
1916	/**
1917	* Resets (zeros) the RAM after all devices and components have been reset.
1918	*
1919	* ASSUMES that the caller owns the PGM lock.
1920	*
1921	* @returns VBox status code.
1922	* @param pVM Pointer to the VM.
1923	*/
1924	int pgmR3PhysRamZeroAll(PVM pVM)
1925	{
1926	PGM_LOCK_ASSERT_OWNER(pVM);
1927
1928	/*
1929	* We batch up pages that should be freed instead of calling GMM for
1930	* each and every one of them.
1931	*/
1932	uint32_t cPendingPages = 0;
1933	PGMMFREEPAGESREQ pReq;
1934	int rc = GMMR3FreePagesPrepare(pVM, &pReq, PGMPHYS_FREE_PAGE_BATCH_SIZE, GMMACCOUNT_BASE);
1935	AssertLogRelRCReturn(rc, rc);
1936
1937	/*
1938	* Walk the ram ranges.
1939	*/
1940	for (PPGMRAMRANGE pRam = pVM->pgm.s.pRamRangesXR3; pRam; pRam = pRam->pNextR3)
1941	{
1942	uint32_t iPage = pRam->cb >> PAGE_SHIFT;
1943	AssertMsg(((RTGCPHYS)iPage << PAGE_SHIFT) == pRam->cb, ("%RGp %RGp\n", (RTGCPHYS)iPage << PAGE_SHIFT, pRam->cb));
1944
1945	#ifndef NO_RAM_RESET
1946	if (!pVM->pgm.s.fRamPreAlloc)
1947	#else
1948	if (0)
1949	#endif
1950	{
1951	/* Replace all RAM pages by ZERO pages. */
1952	while (iPage-- > 0)
1953	{
1954	PPGMPAGE pPage = &pRam->aPages[iPage];
1955	switch (PGM_PAGE_GET_TYPE(pPage))
1956	{
1957	case PGMPAGETYPE_RAM:
1958	/* Do not replace pages part of a 2 MB continuous range
1959	with zero pages, but zero them instead. */
1960	if ( PGM_PAGE_GET_PDE_TYPE(pPage) == PGM_PAGE_PDE_TYPE_PDE
1961	\|\| PGM_PAGE_GET_PDE_TYPE(pPage) == PGM_PAGE_PDE_TYPE_PDE_DISABLED)
1962	{
1963	void *pvPage;
1964	rc = pgmPhysPageMap(pVM, pPage, pRam->GCPhys + ((RTGCPHYS)iPage << PAGE_SHIFT), &pvPage);
1965	AssertLogRelRCReturn(rc, rc);
1966	ASMMemZeroPage(pvPage);
1967	}
1968	else if (PGM_PAGE_IS_BALLOONED(pPage))
1969	{
1970	/* Turn into a zero page; the balloon status is lost when the VM reboots. */
1971	PGM_PAGE_SET_STATE(pVM, pPage, PGM_PAGE_STATE_ZERO);
1972	}
1973	else if (!PGM_PAGE_IS_ZERO(pPage))
1974	{
1975	rc = pgmPhysFreePage(pVM, pReq, &cPendingPages, pPage, pRam->GCPhys + ((RTGCPHYS)iPage << PAGE_SHIFT));
1976	AssertLogRelRCReturn(rc, rc);
1977	}
1978	break;
1979
1980	case PGMPAGETYPE_MMIO2_ALIAS_MMIO:
1981	pgmHandlerPhysicalResetAliasedPage(pVM, pPage, pRam->GCPhys + ((RTGCPHYS)iPage << PAGE_SHIFT),
1982	true /fDoAccounting/);
1983	break;
1984
1985	case PGMPAGETYPE_MMIO2:
1986	case PGMPAGETYPE_ROM_SHADOW: /* handled by pgmR3PhysRomReset. */
1987	case PGMPAGETYPE_ROM:
1988	case PGMPAGETYPE_MMIO:
1989	break;
1990	default:
1991	AssertFailed();
1992	}
1993	} /* for each page */
1994	}
1995	else
1996	{
1997	/* Zero the memory. */
1998	while (iPage-- > 0)
1999	{
2000	PPGMPAGE pPage = &pRam->aPages[iPage];
2001	switch (PGM_PAGE_GET_TYPE(pPage))
2002	{
2003	case PGMPAGETYPE_RAM:
2004	switch (PGM_PAGE_GET_STATE(pPage))
2005	{
2006	case PGM_PAGE_STATE_ZERO:
2007	break;
2008
2009	case PGM_PAGE_STATE_BALLOONED:
2010	/* Turn into a zero page; the balloon status is lost when the VM reboots. */
2011	PGM_PAGE_SET_STATE(pVM, pPage, PGM_PAGE_STATE_ZERO);
2012	break;
2013
2014	case PGM_PAGE_STATE_SHARED:
2015	case PGM_PAGE_STATE_WRITE_MONITORED:
2016	rc = pgmPhysPageMakeWritable(pVM, pPage, pRam->GCPhys + ((RTGCPHYS)iPage << PAGE_SHIFT));
2017	AssertLogRelRCReturn(rc, rc);
2018	/* no break */
2019
2020	case PGM_PAGE_STATE_ALLOCATED:
2021	{
2022	void *pvPage;
2023	rc = pgmPhysPageMap(pVM, pPage, pRam->GCPhys + ((RTGCPHYS)iPage << PAGE_SHIFT), &pvPage);
2024	AssertLogRelRCReturn(rc, rc);
2025	#ifndef NO_RAM_RESET
2026	ASMMemZeroPage(pvPage);
2027	#endif
2028	break;
2029	}
2030	}
2031	break;
2032
2033	case PGMPAGETYPE_MMIO2_ALIAS_MMIO:
2034	pgmHandlerPhysicalResetAliasedPage(pVM, pPage, pRam->GCPhys + ((RTGCPHYS)iPage << PAGE_SHIFT),
2035	true /fDoAccounting/);
2036	break;
2037
2038	case PGMPAGETYPE_MMIO2:
2039	case PGMPAGETYPE_ROM_SHADOW:
2040	case PGMPAGETYPE_ROM:
2041	case PGMPAGETYPE_MMIO:
2042	break;
2043	default:
2044	AssertFailed();
2045
2046	}
2047	} /* for each page */
2048	}
2049
2050	}
2051
2052	/*
2053	* Finish off any pages pending freeing.
2054	*/
2055	if (cPendingPages)
2056	{
2057	rc = GMMR3FreePagesPerform(pVM, pReq, cPendingPages);
2058	AssertLogRelRCReturn(rc, rc);
2059	}
2060	GMMR3FreePagesCleanup(pReq);
2061	return VINF_SUCCESS;
2062	}
2063
2064
2065	/**
2066	* Frees all RAM during VM termination
2067	*
2068	* ASSUMES that the caller owns the PGM lock.
2069	*
2070	* @returns VBox status code.
2071	* @param pVM Pointer to the VM.
2072	*/
2073	int pgmR3PhysRamTerm(PVM pVM)
2074	{
2075	PGM_LOCK_ASSERT_OWNER(pVM);
2076
2077	/* Reset the memory balloon. */
2078	int rc = GMMR3BalloonedPages(pVM, GMMBALLOONACTION_RESET, 0);
2079	AssertRC(rc);
2080
2081	#ifdef VBOX_WITH_PAGE_SHARING
2082	/*
2083	* Clear all registered shared modules.
2084	*/
2085	pgmR3PhysAssertSharedPageChecksums(pVM);
2086	rc = GMMR3ResetSharedModules(pVM);
2087	AssertRC(rc);
2088
2089	/*
2090	* Flush the handy pages updates to make sure no shared pages are hiding
2091	* in there. (No unlikely if the VM shuts down, apparently.)
2092	*/
2093	rc = VMMR3CallR0(pVM, VMMR0_DO_PGM_FLUSH_HANDY_PAGES, 0, NULL);
2094	#endif
2095
2096	/*
2097	* We batch up pages that should be freed instead of calling GMM for
2098	* each and every one of them.
2099	*/
2100	uint32_t cPendingPages = 0;
2101	PGMMFREEPAGESREQ pReq;
2102	rc = GMMR3FreePagesPrepare(pVM, &pReq, PGMPHYS_FREE_PAGE_BATCH_SIZE, GMMACCOUNT_BASE);
2103	AssertLogRelRCReturn(rc, rc);
2104
2105	/*
2106	* Walk the ram ranges.
2107	*/
2108	for (PPGMRAMRANGE pRam = pVM->pgm.s.pRamRangesXR3; pRam; pRam = pRam->pNextR3)
2109	{
2110	uint32_t iPage = pRam->cb >> PAGE_SHIFT;
2111	AssertMsg(((RTGCPHYS)iPage << PAGE_SHIFT) == pRam->cb, ("%RGp %RGp\n", (RTGCPHYS)iPage << PAGE_SHIFT, pRam->cb));
2112
2113	while (iPage-- > 0)
2114	{
2115	PPGMPAGE pPage = &pRam->aPages[iPage];
2116	switch (PGM_PAGE_GET_TYPE(pPage))
2117	{
2118	case PGMPAGETYPE_RAM:
2119	/* Free all shared pages. Private pages are automatically freed during GMM VM cleanup. */
2120	/** @todo change this to explicitly free private pages here. */
2121	if (PGM_PAGE_IS_SHARED(pPage))
2122	{
2123	rc = pgmPhysFreePage(pVM, pReq, &cPendingPages, pPage, pRam->GCPhys + ((RTGCPHYS)iPage << PAGE_SHIFT));
2124	AssertLogRelRCReturn(rc, rc);
2125	}
2126	break;
2127
2128	case PGMPAGETYPE_MMIO2_ALIAS_MMIO:
2129	case PGMPAGETYPE_MMIO2:
2130	case PGMPAGETYPE_ROM_SHADOW: /* handled by pgmR3PhysRomReset. */
2131	case PGMPAGETYPE_ROM:
2132	case PGMPAGETYPE_MMIO:
2133	break;
2134	default:
2135	AssertFailed();
2136	}
2137	} /* for each page */
2138	}
2139
2140	/*
2141	* Finish off any pages pending freeing.
2142	*/
2143	if (cPendingPages)
2144	{
2145	rc = GMMR3FreePagesPerform(pVM, pReq, cPendingPages);
2146	AssertLogRelRCReturn(rc, rc);
2147	}
2148	GMMR3FreePagesCleanup(pReq);
2149	return VINF_SUCCESS;
2150	}
2151
2152	/**
2153	* This is the interface IOM is using to register an MMIO region.
2154	*
2155	* It will check for conflicts and ensure that a RAM range structure
2156	* is present before calling the PGMR3HandlerPhysicalRegister API to
2157	* register the callbacks.
2158	*
2159	* @returns VBox status code.
2160	*
2161	* @param pVM Pointer to the VM.
2162	* @param GCPhys The start of the MMIO region.
2163	* @param cb The size of the MMIO region.
2164	* @param pfnHandlerR3 The address of the ring-3 handler. (IOMR3MMIOHandler)
2165	* @param pvUserR3 The user argument for R3.
2166	* @param pfnHandlerR0 The address of the ring-0 handler. (IOMMMIOHandler)
2167	* @param pvUserR0 The user argument for R0.
2168	* @param pfnHandlerRC The address of the RC handler. (IOMMMIOHandler)
2169	* @param pvUserRC The user argument for RC.
2170	* @param pszDesc The description of the MMIO region.
2171	*/
2172	VMMR3DECL(int) PGMR3PhysMMIORegister(PVM pVM, RTGCPHYS GCPhys, RTGCPHYS cb,
2173	R3PTRTYPE(PFNPGMR3PHYSHANDLER) pfnHandlerR3, RTR3PTR pvUserR3,
2174	R0PTRTYPE(PFNPGMR0PHYSHANDLER) pfnHandlerR0, RTR0PTR pvUserR0,
2175	RCPTRTYPE(PFNPGMRCPHYSHANDLER) pfnHandlerRC, RTRCPTR pvUserRC,
2176	R3PTRTYPE(const char *) pszDesc)
2177	{
2178	/*
2179	* Assert on some assumption.
2180	*/
2181	VM_ASSERT_EMT(pVM);
2182	AssertReturn(!(cb & PAGE_OFFSET_MASK), VERR_INVALID_PARAMETER);
2183	AssertReturn(!(GCPhys & PAGE_OFFSET_MASK), VERR_INVALID_PARAMETER);
2184	AssertPtrReturn(pszDesc, VERR_INVALID_POINTER);
2185	AssertReturn(*pszDesc, VERR_INVALID_PARAMETER);
2186
2187	int rc = pgmLock(pVM);
2188	AssertRCReturn(rc, rc);
2189
2190	/*
2191	* Make sure there's a RAM range structure for the region.
2192	*/
2193	RTGCPHYS GCPhysLast = GCPhys + (cb - 1);
2194	bool fRamExists = false;
2195	PPGMRAMRANGE pRamPrev = NULL;
2196	PPGMRAMRANGE pRam = pVM->pgm.s.pRamRangesXR3;
2197	while (pRam && GCPhysLast >= pRam->GCPhys)
2198	{
2199	if ( GCPhysLast >= pRam->GCPhys
2200	&& GCPhys <= pRam->GCPhysLast)
2201	{
2202	/* Simplification: all within the same range. */
2203	AssertLogRelMsgReturnStmt( GCPhys >= pRam->GCPhys
2204	&& GCPhysLast <= pRam->GCPhysLast,
2205	("%RGp-%RGp (MMIO/%s) falls partly outside %RGp-%RGp (%s)\n",
2206	GCPhys, GCPhysLast, pszDesc,
2207	pRam->GCPhys, pRam->GCPhysLast, pRam->pszDesc),
2208	pgmUnlock(pVM),
2209	VERR_PGM_RAM_CONFLICT);
2210
2211	/* Check that it's all RAM or MMIO pages. */
2212	PCPGMPAGE pPage = &pRam->aPages[(GCPhys - pRam->GCPhys) >> PAGE_SHIFT];
2213	uint32_t cLeft = cb >> PAGE_SHIFT;
2214	while (cLeft-- > 0)
2215	{
2216	AssertLogRelMsgReturnStmt( PGM_PAGE_GET_TYPE(pPage) == PGMPAGETYPE_RAM
2217	\|\| PGM_PAGE_GET_TYPE(pPage) == PGMPAGETYPE_MMIO,
2218	("%RGp-%RGp (MMIO/%s): %RGp is not a RAM or MMIO page - type=%d desc=%s\n",
2219	GCPhys, GCPhysLast, pszDesc, PGM_PAGE_GET_TYPE(pPage), pRam->pszDesc),
2220	pgmUnlock(pVM),
2221	VERR_PGM_RAM_CONFLICT);
2222	pPage++;
2223	}
2224
2225	/* Looks good. */
2226	fRamExists = true;
2227	break;
2228	}
2229
2230	/* next */
2231	pRamPrev = pRam;
2232	pRam = pRam->pNextR3;
2233	}
2234	PPGMRAMRANGE pNew;
2235	if (fRamExists)
2236	{
2237	pNew = NULL;
2238
2239	/*
2240	* Make all the pages in the range MMIO/ZERO pages, freeing any
2241	* RAM pages currently mapped here. This might not be 100% correct
2242	* for PCI memory, but we're doing the same thing for MMIO2 pages.
2243	*/
2244	rc = pgmR3PhysFreePageRange(pVM, pRam, GCPhys, GCPhysLast, PGMPAGETYPE_MMIO);
2245	AssertRCReturnStmt(rc, pgmUnlock(pVM), rc);
2246
2247	/* Force a PGM pool flush as guest ram references have been changed. */
2248	/** @todo not entirely SMP safe; assuming for now the guest takes
2249	* care of this internally (not touch mapped mmio while changing the
2250	* mapping). */
2251	PVMCPU pVCpu = VMMGetCpu(pVM);
2252	pVCpu->pgm.s.fSyncFlags \|= PGM_SYNC_CLEAR_PGM_POOL;
2253	VMCPU_FF_SET(pVCpu, VMCPU_FF_PGM_SYNC_CR3);
2254	}
2255	else
2256	{
2257
2258	/*
2259	* No RAM range, insert an ad hoc one.
2260	*
2261	* Note that we don't have to tell REM about this range because
2262	* PGMHandlerPhysicalRegisterEx will do that for us.
2263	*/
2264	Log(("PGMR3PhysMMIORegister: Adding ad hoc MMIO range for %RGp-%RGp %s\n", GCPhys, GCPhysLast, pszDesc));
2265
2266	const uint32_t cPages = cb >> PAGE_SHIFT;
2267	const size_t cbRamRange = RT_OFFSETOF(PGMRAMRANGE, aPages[cPages]);
2268	rc = MMHyperAlloc(pVM, RT_OFFSETOF(PGMRAMRANGE, aPages[cPages]), 16, MM_TAG_PGM_PHYS, (void **)&pNew);
2269	AssertLogRelMsgRCReturnStmt(rc, ("cbRamRange=%zu\n", cbRamRange), pgmUnlock(pVM), rc);
2270
2271	/* Initialize the range. */
2272	pNew->pSelfR0 = MMHyperCCToR0(pVM, pNew);
2273	pNew->pSelfRC = MMHyperCCToRC(pVM, pNew);
2274	pNew->GCPhys = GCPhys;
2275	pNew->GCPhysLast = GCPhysLast;
2276	pNew->cb = cb;
2277	pNew->pszDesc = pszDesc;
2278	pNew->fFlags = PGM_RAM_RANGE_FLAGS_AD_HOC_MMIO;
2279	pNew->pvR3 = NULL;
2280	pNew->paLSPages = NULL;
2281
2282	uint32_t iPage = cPages;
2283	while (iPage-- > 0)
2284	PGM_PAGE_INIT_ZERO(&pNew->aPages[iPage], pVM, PGMPAGETYPE_MMIO);
2285	Assert(PGM_PAGE_GET_TYPE(&pNew->aPages[0]) == PGMPAGETYPE_MMIO);
2286
2287	/* update the page count stats. */
2288	pVM->pgm.s.cPureMmioPages += cPages;
2289	pVM->pgm.s.cAllPages += cPages;
2290
2291	/* link it */
2292	pgmR3PhysLinkRamRange(pVM, pNew, pRamPrev);
2293	}
2294
2295	/*
2296	* Register the access handler.
2297	*/
2298	rc = PGMHandlerPhysicalRegisterEx(pVM, PGMPHYSHANDLERTYPE_MMIO, GCPhys, GCPhysLast,
2299	pfnHandlerR3, pvUserR3,
2300	pfnHandlerR0, pvUserR0,
2301	pfnHandlerRC, pvUserRC, pszDesc);
2302	if ( RT_FAILURE(rc)
2303	&& !fRamExists)
2304	{
2305	pVM->pgm.s.cPureMmioPages -= cb >> PAGE_SHIFT;
2306	pVM->pgm.s.cAllPages -= cb >> PAGE_SHIFT;
2307
2308	/* remove the ad hoc range. */
2309	pgmR3PhysUnlinkRamRange2(pVM, pNew, pRamPrev);
2310	pNew->cb = pNew->GCPhys = pNew->GCPhysLast = NIL_RTGCPHYS;
2311	MMHyperFree(pVM, pRam);
2312	}
2313	pgmPhysInvalidatePageMapTLB(pVM);
2314
2315	pgmUnlock(pVM);
2316	return rc;
2317	}
2318
2319
2320	/**
2321	* This is the interface IOM is using to register an MMIO region.
2322	*
2323	* It will take care of calling PGMHandlerPhysicalDeregister and clean up
2324	* any ad hoc PGMRAMRANGE left behind.
2325	*
2326	* @returns VBox status code.
2327	* @param pVM Pointer to the VM.
2328	* @param GCPhys The start of the MMIO region.
2329	* @param cb The size of the MMIO region.
2330	*/
2331	VMMR3DECL(int) PGMR3PhysMMIODeregister(PVM pVM, RTGCPHYS GCPhys, RTGCPHYS cb)
2332	{
2333	VM_ASSERT_EMT(pVM);
2334
2335	int rc = pgmLock(pVM);
2336	AssertRCReturn(rc, rc);
2337
2338	/*
2339	* First deregister the handler, then check if we should remove the ram range.
2340	*/
2341	rc = PGMHandlerPhysicalDeregister(pVM, GCPhys);
2342	if (RT_SUCCESS(rc))
2343	{
2344	RTGCPHYS GCPhysLast = GCPhys + (cb - 1);
2345	PPGMRAMRANGE pRamPrev = NULL;
2346	PPGMRAMRANGE pRam = pVM->pgm.s.pRamRangesXR3;
2347	while (pRam && GCPhysLast >= pRam->GCPhys)
2348	{
2349	/** @todo We're being a bit too careful here. rewrite. */
2350	if ( GCPhysLast == pRam->GCPhysLast
2351	&& GCPhys == pRam->GCPhys)
2352	{
2353	Assert(pRam->cb == cb);
2354
2355	/*
2356	* See if all the pages are dead MMIO pages.
2357	*/
2358	uint32_t const cPages = cb >> PAGE_SHIFT;
2359	bool fAllMMIO = true;
2360	uint32_t iPage = 0;
2361	uint32_t cLeft = cPages;
2362	while (cLeft-- > 0)
2363	{
2364	PPGMPAGE pPage = &pRam->aPages[iPage];
2365	if ( PGM_PAGE_GET_TYPE(pPage) != PGMPAGETYPE_MMIO
2366	/\|\| not-out-of-action later /)
2367	{
2368	fAllMMIO = false;
2369	Assert(PGM_PAGE_GET_TYPE(pPage) != PGMPAGETYPE_MMIO2_ALIAS_MMIO);
2370	AssertMsgFailed(("%RGp %R[pgmpage]\n", pRam->GCPhys + ((RTGCPHYS)iPage << PAGE_SHIFT), pPage));
2371	break;
2372	}
2373	Assert(PGM_PAGE_IS_ZERO(pPage));
2374	pPage++;
2375	}
2376	if (fAllMMIO)
2377	{
2378	/*
2379	* Ad-hoc range, unlink and free it.
2380	*/
2381	Log(("PGMR3PhysMMIODeregister: Freeing ad hoc MMIO range for %RGp-%RGp %s\n",
2382	GCPhys, GCPhysLast, pRam->pszDesc));
2383
2384	pVM->pgm.s.cAllPages -= cPages;
2385	pVM->pgm.s.cPureMmioPages -= cPages;
2386
2387	pgmR3PhysUnlinkRamRange2(pVM, pRam, pRamPrev);
2388	pRam->cb = pRam->GCPhys = pRam->GCPhysLast = NIL_RTGCPHYS;
2389	MMHyperFree(pVM, pRam);
2390	break;
2391	}
2392	}
2393
2394	/*
2395	* Range match? It will all be within one range (see PGMAllHandler.cpp).
2396	*/
2397	if ( GCPhysLast >= pRam->GCPhys
2398	&& GCPhys <= pRam->GCPhysLast)
2399	{
2400	Assert(GCPhys >= pRam->GCPhys);
2401	Assert(GCPhysLast <= pRam->GCPhysLast);
2402
2403	/*
2404	* Turn the pages back into RAM pages.
2405	*/
2406	uint32_t iPage = (GCPhys - pRam->GCPhys) >> PAGE_SHIFT;
2407	uint32_t cLeft = cb >> PAGE_SHIFT;
2408	while (cLeft--)
2409	{
2410	PPGMPAGE pPage = &pRam->aPages[iPage];
2411	AssertMsg(PGM_PAGE_IS_MMIO(pPage), ("%RGp %R[pgmpage]\n", pRam->GCPhys + ((RTGCPHYS)iPage << PAGE_SHIFT), pPage));
2412	AssertMsg(PGM_PAGE_IS_ZERO(pPage), ("%RGp %R[pgmpage]\n", pRam->GCPhys + ((RTGCPHYS)iPage << PAGE_SHIFT), pPage));
2413	if (PGM_PAGE_GET_TYPE(pPage) == PGMPAGETYPE_MMIO)
2414	PGM_PAGE_SET_TYPE(pVM, pPage, PGMPAGETYPE_RAM);
2415	}
2416	break;
2417	}
2418
2419	/* next */
2420	pRamPrev = pRam;
2421	pRam = pRam->pNextR3;
2422	}
2423	}
2424
2425	/* Force a PGM pool flush as guest ram references have been changed. */
2426	/** @todo Not entirely SMP safe; assuming for now the guest takes care of
2427	* this internally (not touch mapped mmio while changing the mapping). */
2428	PVMCPU pVCpu = VMMGetCpu(pVM);
2429	pVCpu->pgm.s.fSyncFlags \|= PGM_SYNC_CLEAR_PGM_POOL;
2430	VMCPU_FF_SET(pVCpu, VMCPU_FF_PGM_SYNC_CR3);
2431
2432	pgmPhysInvalidatePageMapTLB(pVM);
2433	pgmPhysInvalidRamRangeTlbs(pVM);
2434	pgmUnlock(pVM);
2435	return rc;
2436	}
2437
2438
2439	/**
2440	* Locate a MMIO2 range.
2441	*
2442	* @returns Pointer to the MMIO2 range.
2443	* @param pVM Pointer to the VM.
2444	* @param pDevIns The device instance owning the region.
2445	* @param iRegion The region.
2446	*/
2447	DECLINLINE(PPGMMMIO2RANGE) pgmR3PhysMMIO2Find(PVM pVM, PPDMDEVINS pDevIns, uint32_t iRegion)
2448	{
2449	/*
2450	* Search the list.
2451	*/
2452	for (PPGMMMIO2RANGE pCur = pVM->pgm.s.pMmio2RangesR3; pCur; pCur = pCur->pNextR3)
2453	if ( pCur->pDevInsR3 == pDevIns
2454	&& pCur->iRegion == iRegion)
2455	return pCur;
2456	return NULL;
2457	}
2458
2459
2460	/**
2461	* Allocate and register an MMIO2 region.
2462	*
2463	* As mentioned elsewhere, MMIO2 is just RAM spelled differently. It's RAM
2464	* associated with a device. It is also non-shared memory with a permanent
2465	* ring-3 mapping and page backing (presently).
2466	*
2467	* A MMIO2 range may overlap with base memory if a lot of RAM is configured for
2468	* the VM, in which case we'll drop the base memory pages. Presently we will
2469	* make no attempt to preserve anything that happens to be present in the base
2470	* memory that is replaced, this is of course incorrectly but it's too much
2471	* effort.
2472	*
2473	* @returns VBox status code.
2474	* @retval VINF_SUCCESS on success, *ppv pointing to the R3 mapping of the
2475	* memory.
2476	* @retval VERR_ALREADY_EXISTS if the region already exists.
2477	*
2478	* @param pVM Pointer to the VM.
2479	* @param pDevIns The device instance owning the region.
2480	* @param iRegion The region number. If the MMIO2 memory is a PCI
2481	* I/O region this number has to be the number of that
2482	* region. Otherwise it can be any number safe
2483	* UINT8_MAX.
2484	* @param cb The size of the region. Must be page aligned.
2485	* @param fFlags Reserved for future use, must be zero.
2486	* @param ppv Where to store the pointer to the ring-3 mapping of
2487	* the memory.
2488	* @param pszDesc The description.
2489	*/
2490	VMMR3DECL(int) PGMR3PhysMMIO2Register(PVM pVM, PPDMDEVINS pDevIns, uint32_t iRegion, RTGCPHYS cb, uint32_t fFlags, void *ppv, const char pszDesc)
2491	{
2492	/*
2493	* Validate input.
2494	*/
2495	VM_ASSERT_EMT_RETURN(pVM, VERR_VM_THREAD_NOT_EMT);
2496	AssertPtrReturn(pDevIns, VERR_INVALID_PARAMETER);
2497	AssertReturn(iRegion <= UINT8_MAX, VERR_INVALID_PARAMETER);
2498	AssertPtrReturn(ppv, VERR_INVALID_POINTER);
2499	AssertPtrReturn(pszDesc, VERR_INVALID_POINTER);
2500	AssertReturn(*pszDesc, VERR_INVALID_PARAMETER);
2501	AssertReturn(pgmR3PhysMMIO2Find(pVM, pDevIns, iRegion) == NULL, VERR_ALREADY_EXISTS);
2502	AssertReturn(!(cb & PAGE_OFFSET_MASK), VERR_INVALID_PARAMETER);
2503	AssertReturn(cb, VERR_INVALID_PARAMETER);
2504	AssertReturn(!fFlags, VERR_INVALID_PARAMETER);
2505
2506	const uint32_t cPages = cb >> PAGE_SHIFT;
2507	AssertLogRelReturn(((RTGCPHYS)cPages << PAGE_SHIFT) == cb, VERR_INVALID_PARAMETER);
2508	AssertLogRelReturn(cPages <= INT32_MAX / 2, VERR_NO_MEMORY);
2509
2510	/*
2511	* For the 2nd+ instance, mangle the description string so it's unique.
2512	*/
2513	if (pDevIns->iInstance > 0) /** @todo Move to PDMDevHlp.cpp and use a real string cache. */
2514	{
2515	pszDesc = MMR3HeapAPrintf(pVM, MM_TAG_PGM_PHYS, "%s [%u]", pszDesc, pDevIns->iInstance);
2516	if (!pszDesc)
2517	return VERR_NO_MEMORY;
2518	}
2519
2520	/*
2521	* Try reserve and allocate the backing memory first as this is what is
2522	* most likely to fail.
2523	*/
2524	int rc = MMR3AdjustFixedReservation(pVM, cPages, pszDesc);
2525	if (RT_SUCCESS(rc))
2526	{
2527	void *pvPages;
2528	PSUPPAGE paPages = (PSUPPAGE)RTMemTmpAlloc(cPages * sizeof(SUPPAGE));
2529	if (RT_SUCCESS(rc))
2530	rc = SUPR3PageAllocEx(cPages, 0 /fFlags/, &pvPages, NULL /pR0Ptr/, paPages);
2531	if (RT_SUCCESS(rc))
2532	{
2533	memset(pvPages, 0, cPages * PAGE_SIZE);
2534
2535	/*
2536	* Create the MMIO2 range record for it.
2537	*/
2538	const size_t cbRange = RT_OFFSETOF(PGMMMIO2RANGE, RamRange.aPages[cPages]);
2539	PPGMMMIO2RANGE pNew;
2540	rc = MMR3HyperAllocOnceNoRel(pVM, cbRange, 0, MM_TAG_PGM_PHYS, (void **)&pNew);
2541	AssertLogRelMsgRC(rc, ("cbRamRange=%zu\n", cbRange));
2542	if (RT_SUCCESS(rc))
2543	{
2544	pNew->pDevInsR3 = pDevIns;
2545	pNew->pvR3 = pvPages;
2546	//pNew->pNext = NULL;
2547	//pNew->fMapped = false;
2548	//pNew->fOverlapping = false;
2549	pNew->iRegion = iRegion;
2550	pNew->idSavedState = UINT8_MAX;
2551	pNew->RamRange.pSelfR0 = MMHyperCCToR0(pVM, &pNew->RamRange);
2552	pNew->RamRange.pSelfRC = MMHyperCCToRC(pVM, &pNew->RamRange);
2553	pNew->RamRange.GCPhys = NIL_RTGCPHYS;
2554	pNew->RamRange.GCPhysLast = NIL_RTGCPHYS;
2555	pNew->RamRange.pszDesc = pszDesc;
2556	pNew->RamRange.cb = cb;
2557	pNew->RamRange.fFlags = PGM_RAM_RANGE_FLAGS_AD_HOC_MMIO2;
2558	pNew->RamRange.pvR3 = pvPages;
2559	//pNew->RamRange.paLSPages = NULL;
2560
2561	uint32_t iPage = cPages;
2562	while (iPage-- > 0)
2563	{
2564	PGM_PAGE_INIT(&pNew->RamRange.aPages[iPage],
2565	paPages[iPage].Phys, NIL_GMM_PAGEID,
2566	PGMPAGETYPE_MMIO2, PGM_PAGE_STATE_ALLOCATED);
2567	}
2568
2569	/* update page count stats */
2570	pVM->pgm.s.cAllPages += cPages;
2571	pVM->pgm.s.cPrivatePages += cPages;
2572
2573	/*
2574	* Link it into the list.
2575	* Since there is no particular order, just push it.
2576	*/
2577	pgmLock(pVM);
2578	pNew->pNextR3 = pVM->pgm.s.pMmio2RangesR3;
2579	pVM->pgm.s.pMmio2RangesR3 = pNew;
2580	pgmUnlock(pVM);
2581
2582	*ppv = pvPages;
2583	RTMemTmpFree(paPages);
2584	pgmPhysInvalidatePageMapTLB(pVM);
2585	return VINF_SUCCESS;
2586	}
2587
2588	SUPR3PageFreeEx(pvPages, cPages);
2589	}
2590	RTMemTmpFree(paPages);
2591	MMR3AdjustFixedReservation(pVM, -(int32_t)cPages, pszDesc);
2592	}
2593	if (pDevIns->iInstance > 0)
2594	MMR3HeapFree((void *)pszDesc);
2595	return rc;
2596	}
2597
2598
2599	/**
2600	* Deregisters and frees an MMIO2 region.
2601	*
2602	* Any physical (and virtual) access handlers registered for the region must
2603	* be deregistered before calling this function.
2604	*
2605	* @returns VBox status code.
2606	* @param pVM Pointer to the VM.
2607	* @param pDevIns The device instance owning the region.
2608	* @param iRegion The region. If it's UINT32_MAX it'll be a wildcard match.
2609	*/
2610	VMMR3DECL(int) PGMR3PhysMMIO2Deregister(PVM pVM, PPDMDEVINS pDevIns, uint32_t iRegion)
2611	{
2612	/*
2613	* Validate input.
2614	*/
2615	VM_ASSERT_EMT_RETURN(pVM, VERR_VM_THREAD_NOT_EMT);
2616	AssertPtrReturn(pDevIns, VERR_INVALID_PARAMETER);
2617	AssertReturn(iRegion <= UINT8_MAX \|\| iRegion == UINT32_MAX, VERR_INVALID_PARAMETER);
2618
2619	pgmLock(pVM);
2620	int rc = VINF_SUCCESS;
2621	unsigned cFound = 0;
2622	PPGMMMIO2RANGE pPrev = NULL;
2623	PPGMMMIO2RANGE pCur = pVM->pgm.s.pMmio2RangesR3;
2624	while (pCur)
2625	{
2626	if ( pCur->pDevInsR3 == pDevIns
2627	&& ( iRegion == UINT32_MAX
2628	\|\| pCur->iRegion == iRegion))
2629	{
2630	cFound++;
2631
2632	/*
2633	* Unmap it if it's mapped.
2634	*/
2635	if (pCur->fMapped)
2636	{
2637	int rc2 = PGMR3PhysMMIO2Unmap(pVM, pCur->pDevInsR3, pCur->iRegion, pCur->RamRange.GCPhys);
2638	AssertRC(rc2);
2639	if (RT_FAILURE(rc2) && RT_SUCCESS(rc))
2640	rc = rc2;
2641	}
2642
2643	/*
2644	* Unlink it
2645	*/
2646	PPGMMMIO2RANGE pNext = pCur->pNextR3;
2647	if (pPrev)
2648	pPrev->pNextR3 = pNext;
2649	else
2650	pVM->pgm.s.pMmio2RangesR3 = pNext;
2651	pCur->pNextR3 = NULL;
2652
2653	/*
2654	* Free the memory.
2655	*/
2656	int rc2 = SUPR3PageFreeEx(pCur->pvR3, pCur->RamRange.cb >> PAGE_SHIFT);
2657	AssertRC(rc2);
2658	if (RT_FAILURE(rc2) && RT_SUCCESS(rc))
2659	rc = rc2;
2660
2661	uint32_t const cPages = pCur->RamRange.cb >> PAGE_SHIFT;
2662	rc2 = MMR3AdjustFixedReservation(pVM, -(int32_t)cPages, pCur->RamRange.pszDesc);
2663	AssertRC(rc2);
2664	if (RT_FAILURE(rc2) && RT_SUCCESS(rc))
2665	rc = rc2;
2666
2667	/* we're leaking hyper memory here if done at runtime. */
2668	#ifdef VBOX_STRICT
2669	VMSTATE const enmState = VMR3GetState(pVM);
2670	AssertMsg( enmState == VMSTATE_POWERING_OFF
2671	\|\| enmState == VMSTATE_POWERING_OFF_LS
2672	\|\| enmState == VMSTATE_OFF
2673	\|\| enmState == VMSTATE_OFF_LS
2674	\|\| enmState == VMSTATE_DESTROYING
2675	\|\| enmState == VMSTATE_TERMINATED
2676	\|\| enmState == VMSTATE_CREATING
2677	, ("%s\n", VMR3GetStateName(enmState)));
2678	#endif
2679	/*rc = MMHyperFree(pVM, pCur);
2680	AssertRCReturn(rc, rc); - not safe, see the alloc call. */
2681
2682
2683	/* update page count stats */
2684	pVM->pgm.s.cAllPages -= cPages;
2685	pVM->pgm.s.cPrivatePages -= cPages;
2686
2687	/* next */
2688	pCur = pNext;
2689	}
2690	else
2691	{
2692	pPrev = pCur;
2693	pCur = pCur->pNextR3;
2694	}
2695	}
2696	pgmPhysInvalidatePageMapTLB(pVM);
2697	pgmUnlock(pVM);
2698	return !cFound && iRegion != UINT32_MAX ? VERR_NOT_FOUND : rc;
2699	}
2700
2701
2702	/**
2703	* Maps a MMIO2 region.
2704	*
2705	* This is done when a guest / the bios / state loading changes the
2706	* PCI config. The replacing of base memory has the same restrictions
2707	* as during registration, of course.
2708	*
2709	* @returns VBox status code.
2710	*
2711	* @param pVM Pointer to the VM.
2712	* @param pDevIns The device instance owning the region.
2713	*/
2714	VMMR3DECL(int) PGMR3PhysMMIO2Map(PVM pVM, PPDMDEVINS pDevIns, uint32_t iRegion, RTGCPHYS GCPhys)
2715	{
2716	/*
2717	* Validate input
2718	*/
2719	VM_ASSERT_EMT_RETURN(pVM, VERR_VM_THREAD_NOT_EMT);
2720	AssertPtrReturn(pDevIns, VERR_INVALID_PARAMETER);
2721	AssertReturn(iRegion <= UINT8_MAX, VERR_INVALID_PARAMETER);
2722	AssertReturn(GCPhys != NIL_RTGCPHYS, VERR_INVALID_PARAMETER);
2723	AssertReturn(GCPhys != 0, VERR_INVALID_PARAMETER);
2724	AssertReturn(!(GCPhys & PAGE_OFFSET_MASK), VERR_INVALID_PARAMETER);
2725
2726	PPGMMMIO2RANGE pCur = pgmR3PhysMMIO2Find(pVM, pDevIns, iRegion);
2727	AssertReturn(pCur, VERR_NOT_FOUND);
2728	AssertReturn(!pCur->fMapped, VERR_WRONG_ORDER);
2729	Assert(pCur->RamRange.GCPhys == NIL_RTGCPHYS);
2730	Assert(pCur->RamRange.GCPhysLast == NIL_RTGCPHYS);
2731
2732	const RTGCPHYS GCPhysLast = GCPhys + pCur->RamRange.cb - 1;
2733	AssertReturn(GCPhysLast > GCPhys, VERR_INVALID_PARAMETER);
2734
2735	/*
2736	* Find our location in the ram range list, checking for
2737	* restriction we don't bother implementing yet (partially overlapping).
2738	*/
2739	bool fRamExists = false;
2740	PPGMRAMRANGE pRamPrev = NULL;
2741	PPGMRAMRANGE pRam = pVM->pgm.s.pRamRangesXR3;
2742	while (pRam && GCPhysLast >= pRam->GCPhys)
2743	{
2744	if ( GCPhys <= pRam->GCPhysLast
2745	&& GCPhysLast >= pRam->GCPhys)
2746	{
2747	/* completely within? */
2748	AssertLogRelMsgReturn( GCPhys >= pRam->GCPhys
2749	&& GCPhysLast <= pRam->GCPhysLast,
2750	("%RGp-%RGp (MMIO2/%s) falls partly outside %RGp-%RGp (%s)\n",
2751	GCPhys, GCPhysLast, pCur->RamRange.pszDesc,
2752	pRam->GCPhys, pRam->GCPhysLast, pRam->pszDesc),
2753	VERR_PGM_RAM_CONFLICT);
2754	fRamExists = true;
2755	break;
2756	}
2757
2758	/* next */
2759	pRamPrev = pRam;
2760	pRam = pRam->pNextR3;
2761	}
2762	if (fRamExists)
2763	{
2764	PPGMPAGE pPage = &pRam->aPages[(GCPhys - pRam->GCPhys) >> PAGE_SHIFT];
2765	uint32_t cPagesLeft = pCur->RamRange.cb >> PAGE_SHIFT;
2766	while (cPagesLeft-- > 0)
2767	{
2768	AssertLogRelMsgReturn(PGM_PAGE_GET_TYPE(pPage) == PGMPAGETYPE_RAM,
2769	("%RGp isn't a RAM page (%d) - mapping %RGp-%RGp (MMIO2/%s).\n",
2770	GCPhys, PGM_PAGE_GET_TYPE(pPage), GCPhys, GCPhysLast, pCur->RamRange.pszDesc),
2771	VERR_PGM_RAM_CONFLICT);
2772	pPage++;
2773	}
2774	}
2775	Log(("PGMR3PhysMMIO2Map: %RGp-%RGp fRamExists=%RTbool %s\n",
2776	GCPhys, GCPhysLast, fRamExists, pCur->RamRange.pszDesc));
2777
2778	/*
2779	* Make the changes.
2780	*/
2781	pgmLock(pVM);
2782
2783	pCur->RamRange.GCPhys = GCPhys;
2784	pCur->RamRange.GCPhysLast = GCPhysLast;
2785	pCur->fMapped = true;
2786	pCur->fOverlapping = fRamExists;
2787
2788	if (fRamExists)
2789	{
2790	/** @todo use pgmR3PhysFreePageRange here. */
2791	uint32_t cPendingPages = 0;
2792	PGMMFREEPAGESREQ pReq;
2793	int rc = GMMR3FreePagesPrepare(pVM, &pReq, PGMPHYS_FREE_PAGE_BATCH_SIZE, GMMACCOUNT_BASE);
2794	AssertLogRelRCReturn(rc, rc);
2795
2796	/* replace the pages, freeing all present RAM pages. */
2797	PPGMPAGE pPageSrc = &pCur->RamRange.aPages[0];
2798	PPGMPAGE pPageDst = &pRam->aPages[(GCPhys - pRam->GCPhys) >> PAGE_SHIFT];
2799	uint32_t cPagesLeft = pCur->RamRange.cb >> PAGE_SHIFT;
2800	while (cPagesLeft-- > 0)
2801	{
2802	rc = pgmPhysFreePage(pVM, pReq, &cPendingPages, pPageDst, GCPhys);
2803	AssertLogRelRCReturn(rc, rc); /* We're done for if this goes wrong. */
2804
2805	RTHCPHYS const HCPhys = PGM_PAGE_GET_HCPHYS(pPageSrc);
2806	PGM_PAGE_SET_HCPHYS(pVM, pPageDst, HCPhys);
2807	PGM_PAGE_SET_TYPE(pVM, pPageDst, PGMPAGETYPE_MMIO2);
2808	PGM_PAGE_SET_STATE(pVM, pPageDst, PGM_PAGE_STATE_ALLOCATED);
2809	PGM_PAGE_SET_PDE_TYPE(pVM, pPageDst, PGM_PAGE_PDE_TYPE_DONTCARE);
2810	PGM_PAGE_SET_PTE_INDEX(pVM, pPageDst, 0);
2811	PGM_PAGE_SET_TRACKING(pVM, pPageDst, 0);
2812
2813	pVM->pgm.s.cZeroPages--;
2814	GCPhys += PAGE_SIZE;
2815	pPageSrc++;
2816	pPageDst++;
2817	}
2818
2819	/* Flush physical page map TLB. */
2820	pgmPhysInvalidatePageMapTLB(pVM);
2821
2822	if (cPendingPages)
2823	{
2824	rc = GMMR3FreePagesPerform(pVM, pReq, cPendingPages);
2825	AssertLogRelRCReturn(rc, rc);
2826	}
2827	GMMR3FreePagesCleanup(pReq);
2828
2829	/* Force a PGM pool flush as guest ram references have been changed. */
2830	/** @todo not entirely SMP safe; assuming for now the guest takes care of
2831	* this internally (not touch mapped mmio while changing the mapping). */
2832	PVMCPU pVCpu = VMMGetCpu(pVM);
2833	pVCpu->pgm.s.fSyncFlags \|= PGM_SYNC_CLEAR_PGM_POOL;
2834	VMCPU_FF_SET(pVCpu, VMCPU_FF_PGM_SYNC_CR3);
2835
2836	pgmUnlock(pVM);
2837	}
2838	else
2839	{
2840	RTGCPHYS cb = pCur->RamRange.cb;
2841
2842	/* Clear the tracking data of pages we're going to reactivate. */
2843	PPGMPAGE pPageSrc = &pCur->RamRange.aPages[0];
2844	uint32_t cPagesLeft = pCur->RamRange.cb >> PAGE_SHIFT;
2845	while (cPagesLeft-- > 0)
2846	{
2847	PGM_PAGE_SET_TRACKING(pVM, pPageSrc, 0);
2848	PGM_PAGE_SET_PTE_INDEX(pVM, pPageSrc, 0);
2849	pPageSrc++;
2850	}
2851
2852	/* link in the ram range */
2853	pgmR3PhysLinkRamRange(pVM, &pCur->RamRange, pRamPrev);
2854	pgmUnlock(pVM);
2855
2856	#ifdef VBOX_WITH_REM
2857	REMR3NotifyPhysRamRegister(pVM, GCPhys, cb, REM_NOTIFY_PHYS_RAM_FLAGS_MMIO2);
2858	#endif
2859	}
2860
2861	pgmPhysInvalidatePageMapTLB(pVM);
2862	return VINF_SUCCESS;
2863	}
2864
2865
2866	/**
2867	* Unmaps a MMIO2 region.
2868	*
2869	* This is done when a guest / the bios / state loading changes the
2870	* PCI config. The replacing of base memory has the same restrictions
2871	* as during registration, of course.
2872	*/
2873	VMMR3DECL(int) PGMR3PhysMMIO2Unmap(PVM pVM, PPDMDEVINS pDevIns, uint32_t iRegion, RTGCPHYS GCPhys)
2874	{
2875	/*
2876	* Validate input
2877	*/
2878	VM_ASSERT_EMT_RETURN(pVM, VERR_VM_THREAD_NOT_EMT);
2879	AssertPtrReturn(pDevIns, VERR_INVALID_PARAMETER);
2880	AssertReturn(iRegion <= UINT8_MAX, VERR_INVALID_PARAMETER);
2881	AssertReturn(GCPhys != NIL_RTGCPHYS, VERR_INVALID_PARAMETER);
2882	AssertReturn(GCPhys != 0, VERR_INVALID_PARAMETER);
2883	AssertReturn(!(GCPhys & PAGE_OFFSET_MASK), VERR_INVALID_PARAMETER);
2884
2885	PPGMMMIO2RANGE pCur = pgmR3PhysMMIO2Find(pVM, pDevIns, iRegion);
2886	AssertReturn(pCur, VERR_NOT_FOUND);
2887	AssertReturn(pCur->fMapped, VERR_WRONG_ORDER);
2888	AssertReturn(pCur->RamRange.GCPhys == GCPhys, VERR_INVALID_PARAMETER);
2889	Assert(pCur->RamRange.GCPhysLast != NIL_RTGCPHYS);
2890
2891	Log(("PGMR3PhysMMIO2Unmap: %RGp-%RGp %s\n",
2892	pCur->RamRange.GCPhys, pCur->RamRange.GCPhysLast, pCur->RamRange.pszDesc));
2893
2894	/*
2895	* Unmap it.
2896	*/
2897	pgmLock(pVM);
2898
2899	#ifdef VBOX_WITH_REM
2900	RTGCPHYS GCPhysRangeREM;
2901	RTGCPHYS cbRangeREM;
2902	bool fInformREM;
2903	#endif
2904	if (pCur->fOverlapping)
2905	{
2906	/* Restore the RAM pages we've replaced. */
2907	PPGMRAMRANGE pRam = pVM->pgm.s.pRamRangesXR3;
2908	while (pRam->GCPhys > pCur->RamRange.GCPhysLast)
2909	pRam = pRam->pNextR3;
2910
2911	PPGMPAGE pPageDst = &pRam->aPages[(pCur->RamRange.GCPhys - pRam->GCPhys) >> PAGE_SHIFT];
2912	uint32_t cPagesLeft = pCur->RamRange.cb >> PAGE_SHIFT;
2913	while (cPagesLeft-- > 0)
2914	{
2915	PGM_PAGE_INIT_ZERO(pPageDst, pVM, PGMPAGETYPE_RAM);
2916	pVM->pgm.s.cZeroPages++;
2917	pPageDst++;
2918	}
2919
2920	/* Flush physical page map TLB. */
2921	pgmPhysInvalidatePageMapTLB(pVM);
2922	#ifdef VBOX_WITH_REM
2923	GCPhysRangeREM = NIL_RTGCPHYS; /* shuts up gcc */
2924	cbRangeREM = RTGCPHYS_MAX; /* ditto */
2925	fInformREM = false;
2926	#endif
2927	}
2928	else
2929	{
2930	#ifdef VBOX_WITH_REM
2931	GCPhysRangeREM = pCur->RamRange.GCPhys;
2932	cbRangeREM = pCur->RamRange.cb;
2933	fInformREM = true;
2934	#endif
2935	pgmR3PhysUnlinkRamRange(pVM, &pCur->RamRange);
2936	}
2937
2938	pCur->RamRange.GCPhys = NIL_RTGCPHYS;
2939	pCur->RamRange.GCPhysLast = NIL_RTGCPHYS;
2940	pCur->fOverlapping = false;
2941	pCur->fMapped = false;
2942
2943	/* Force a PGM pool flush as guest ram references have been changed. */
2944	/** @todo not entirely SMP safe; assuming for now the guest takes care
2945	* of this internally (not touch mapped mmio while changing the
2946	* mapping). */
2947	PVMCPU pVCpu = VMMGetCpu(pVM);
2948	pVCpu->pgm.s.fSyncFlags \|= PGM_SYNC_CLEAR_PGM_POOL;
2949	VMCPU_FF_SET(pVCpu, VMCPU_FF_PGM_SYNC_CR3);
2950
2951	pgmPhysInvalidatePageMapTLB(pVM);
2952	pgmPhysInvalidRamRangeTlbs(pVM);
2953	pgmUnlock(pVM);
2954
2955	#ifdef VBOX_WITH_REM
2956	if (fInformREM)
2957	REMR3NotifyPhysRamDeregister(pVM, GCPhysRangeREM, cbRangeREM);
2958	#endif
2959
2960	return VINF_SUCCESS;
2961	}
2962
2963
2964	/**
2965	* Checks if the given address is an MMIO2 base address or not.
2966	*
2967	* @returns true/false accordingly.
2968	* @param pVM Pointer to the VM.
2969	* @param pDevIns The owner of the memory, optional.
2970	* @param GCPhys The address to check.
2971	*/
2972	VMMR3DECL(bool) PGMR3PhysMMIO2IsBase(PVM pVM, PPDMDEVINS pDevIns, RTGCPHYS GCPhys)
2973	{
2974	/*
2975	* Validate input
2976	*/
2977	VM_ASSERT_EMT_RETURN(pVM, false);
2978	AssertPtrReturn(pDevIns, false);
2979	AssertReturn(GCPhys != NIL_RTGCPHYS, false);
2980	AssertReturn(GCPhys != 0, false);
2981	AssertReturn(!(GCPhys & PAGE_OFFSET_MASK), false);
2982
2983	/*
2984	* Search the list.
2985	*/
2986	pgmLock(pVM);
2987	for (PPGMMMIO2RANGE pCur = pVM->pgm.s.pMmio2RangesR3; pCur; pCur = pCur->pNextR3)
2988	if (pCur->RamRange.GCPhys == GCPhys)
2989	{
2990	Assert(pCur->fMapped);
2991	pgmUnlock(pVM);
2992	return true;
2993	}
2994	pgmUnlock(pVM);
2995	return false;
2996	}
2997
2998
2999	/**
3000	* Gets the HC physical address of a page in the MMIO2 region.
3001	*
3002	* This is API is intended for MMHyper and shouldn't be called
3003	* by anyone else...
3004	*
3005	* @returns VBox status code.
3006	* @param pVM Pointer to the VM.
3007	* @param pDevIns The owner of the memory, optional.
3008	* @param iRegion The region.
3009	* @param off The page expressed an offset into the MMIO2 region.
3010	* @param pHCPhys Where to store the result.
3011	*/
3012	VMMR3DECL(int) PGMR3PhysMMIO2GetHCPhys(PVM pVM, PPDMDEVINS pDevIns, uint32_t iRegion, RTGCPHYS off, PRTHCPHYS pHCPhys)
3013	{
3014	/*
3015	* Validate input
3016	*/
3017	VM_ASSERT_EMT_RETURN(pVM, VERR_VM_THREAD_NOT_EMT);
3018	AssertPtrReturn(pDevIns, VERR_INVALID_PARAMETER);
3019	AssertReturn(iRegion <= UINT8_MAX, VERR_INVALID_PARAMETER);
3020
3021	pgmLock(pVM);
3022	PPGMMMIO2RANGE pCur = pgmR3PhysMMIO2Find(pVM, pDevIns, iRegion);
3023	AssertReturn(pCur, VERR_NOT_FOUND);
3024	AssertReturn(off < pCur->RamRange.cb, VERR_INVALID_PARAMETER);
3025
3026	PCPGMPAGE pPage = &pCur->RamRange.aPages[off >> PAGE_SHIFT];
3027	*pHCPhys = PGM_PAGE_GET_HCPHYS(pPage);
3028	pgmUnlock(pVM);
3029	return VINF_SUCCESS;
3030	}
3031
3032
3033	/**
3034	* Maps a portion of an MMIO2 region into kernel space (host).
3035	*
3036	* The kernel mapping will become invalid when the MMIO2 memory is deregistered
3037	* or the VM is terminated.
3038	*
3039	* @return VBox status code.
3040	*
3041	* @param pVM Pointer to the VM.
3042	* @param pDevIns The device owning the MMIO2 memory.
3043	* @param iRegion The region.
3044	* @param off The offset into the region. Must be page aligned.
3045	* @param cb The number of bytes to map. Must be page aligned.
3046	* @param pszDesc Mapping description.
3047	* @param pR0Ptr Where to store the R0 address.
3048	*/
3049	VMMR3DECL(int) PGMR3PhysMMIO2MapKernel(PVM pVM, PPDMDEVINS pDevIns, uint32_t iRegion, RTGCPHYS off, RTGCPHYS cb,
3050	const char *pszDesc, PRTR0PTR pR0Ptr)
3051	{
3052	/*
3053	* Validate input.
3054	*/
3055	VM_ASSERT_EMT_RETURN(pVM, VERR_VM_THREAD_NOT_EMT);
3056	AssertPtrReturn(pDevIns, VERR_INVALID_PARAMETER);
3057	AssertReturn(iRegion <= UINT8_MAX, VERR_INVALID_PARAMETER);
3058
3059	PPGMMMIO2RANGE pCur = pgmR3PhysMMIO2Find(pVM, pDevIns, iRegion);
3060	AssertReturn(pCur, VERR_NOT_FOUND);
3061	AssertReturn(off < pCur->RamRange.cb, VERR_INVALID_PARAMETER);
3062	AssertReturn(cb <= pCur->RamRange.cb, VERR_INVALID_PARAMETER);
3063	AssertReturn(off + cb <= pCur->RamRange.cb, VERR_INVALID_PARAMETER);
3064	NOREF(pszDesc);
3065
3066	/*
3067	* Pass the request on to the support library/driver.
3068	*/
3069	int rc = SUPR3PageMapKernel(pCur->pvR3, off, cb, 0, pR0Ptr);
3070
3071	return rc;
3072	}
3073
3074
3075	/**
3076	* Worker for PGMR3PhysRomRegister.
3077	*
3078	* This is here to simplify lock management, i.e. the caller does all the
3079	* locking and we can simply return without needing to remember to unlock
3080	* anything first.
3081	*
3082	* @returns VBox status.
3083	* @param pVM Pointer to the VM.
3084	* @param pDevIns The device instance owning the ROM.
3085	* @param GCPhys First physical address in the range.
3086	* Must be page aligned!
3087	* @param cb The size of the range (in bytes).
3088	* Must be page aligned!
3089	* @param pvBinary Pointer to the binary data backing the ROM image.
3090	* @param cbBinary The size of the binary data pvBinary points to.
3091	* This must be less or equal to @a cb.
3092	* @param fFlags Mask of flags. PGMPHYS_ROM_FLAGS_SHADOWED
3093	* and/or PGMPHYS_ROM_FLAGS_PERMANENT_BINARY.
3094	* @param pszDesc Pointer to description string. This must not be freed.
3095	*/
3096	static int pgmR3PhysRomRegister(PVM pVM, PPDMDEVINS pDevIns, RTGCPHYS GCPhys, RTGCPHYS cb,
3097	const void pvBinary, uint32_t cbBinary, uint32_t fFlags, const char pszDesc)
3098	{
3099	/*
3100	* Validate input.
3101	*/
3102	AssertPtrReturn(pDevIns, VERR_INVALID_PARAMETER);
3103	AssertReturn(RT_ALIGN_T(GCPhys, PAGE_SIZE, RTGCPHYS) == GCPhys, VERR_INVALID_PARAMETER);
3104	AssertReturn(RT_ALIGN_T(cb, PAGE_SIZE, RTGCPHYS) == cb, VERR_INVALID_PARAMETER);
3105	RTGCPHYS GCPhysLast = GCPhys + (cb - 1);
3106	AssertReturn(GCPhysLast > GCPhys, VERR_INVALID_PARAMETER);
3107	AssertPtrReturn(pvBinary, VERR_INVALID_PARAMETER);
3108	AssertPtrReturn(pszDesc, VERR_INVALID_POINTER);
3109	AssertReturn(!(fFlags & ~(PGMPHYS_ROM_FLAGS_SHADOWED \| PGMPHYS_ROM_FLAGS_PERMANENT_BINARY)), VERR_INVALID_PARAMETER);
3110	VM_ASSERT_STATE_RETURN(pVM, VMSTATE_CREATING, VERR_VM_INVALID_VM_STATE);
3111
3112	const uint32_t cPages = cb >> PAGE_SHIFT;
3113
3114	/*
3115	* Find the ROM location in the ROM list first.
3116	*/
3117	PPGMROMRANGE pRomPrev = NULL;
3118	PPGMROMRANGE pRom = pVM->pgm.s.pRomRangesR3;
3119	while (pRom && GCPhysLast >= pRom->GCPhys)
3120	{
3121	if ( GCPhys <= pRom->GCPhysLast
3122	&& GCPhysLast >= pRom->GCPhys)
3123	AssertLogRelMsgFailedReturn(("%RGp-%RGp (%s) conflicts with existing %RGp-%RGp (%s)\n",
3124	GCPhys, GCPhysLast, pszDesc,
3125	pRom->GCPhys, pRom->GCPhysLast, pRom->pszDesc),
3126	VERR_PGM_RAM_CONFLICT);
3127	/* next */
3128	pRomPrev = pRom;
3129	pRom = pRom->pNextR3;
3130	}
3131
3132	/*
3133	* Find the RAM location and check for conflicts.
3134	*
3135	* Conflict detection is a bit different than for RAM
3136	* registration since a ROM can be located within a RAM
3137	* range. So, what we have to check for is other memory
3138	* types (other than RAM that is) and that we don't span
3139	* more than one RAM range (layz).
3140	*/
3141	bool fRamExists = false;
3142	PPGMRAMRANGE pRamPrev = NULL;
3143	PPGMRAMRANGE pRam = pVM->pgm.s.pRamRangesXR3;
3144	while (pRam && GCPhysLast >= pRam->GCPhys)
3145	{
3146	if ( GCPhys <= pRam->GCPhysLast
3147	&& GCPhysLast >= pRam->GCPhys)
3148	{
3149	/* completely within? */
3150	AssertLogRelMsgReturn( GCPhys >= pRam->GCPhys
3151	&& GCPhysLast <= pRam->GCPhysLast,
3152	("%RGp-%RGp (%s) falls partly outside %RGp-%RGp (%s)\n",
3153	GCPhys, GCPhysLast, pszDesc,
3154	pRam->GCPhys, pRam->GCPhysLast, pRam->pszDesc),
3155	VERR_PGM_RAM_CONFLICT);
3156	fRamExists = true;
3157	break;
3158	}
3159
3160	/* next */
3161	pRamPrev = pRam;
3162	pRam = pRam->pNextR3;
3163	}
3164	if (fRamExists)
3165	{
3166	PPGMPAGE pPage = &pRam->aPages[(GCPhys - pRam->GCPhys) >> PAGE_SHIFT];
3167	uint32_t cPagesLeft = cPages;
3168	while (cPagesLeft-- > 0)
3169	{
3170	AssertLogRelMsgReturn(PGM_PAGE_GET_TYPE(pPage) == PGMPAGETYPE_RAM,
3171	("%RGp (%R[pgmpage]) isn't a RAM page - registering %RGp-%RGp (%s).\n",
3172	pRam->GCPhys + ((RTGCPHYS)(uintptr_t)(pPage - &pRam->aPages[0]) << PAGE_SHIFT),
3173	pPage, GCPhys, GCPhysLast, pszDesc), VERR_PGM_RAM_CONFLICT);
3174	Assert(PGM_PAGE_IS_ZERO(pPage));
3175	pPage++;
3176	}
3177	}
3178
3179	/*
3180	* Update the base memory reservation if necessary.
3181	*/
3182	uint32_t cExtraBaseCost = fRamExists ? 0 : cPages;
3183	if (fFlags & PGMPHYS_ROM_FLAGS_SHADOWED)
3184	cExtraBaseCost += cPages;
3185	if (cExtraBaseCost)
3186	{
3187	int rc = MMR3IncreaseBaseReservation(pVM, cExtraBaseCost);
3188	if (RT_FAILURE(rc))
3189	return rc;
3190	}
3191
3192	/*
3193	* Allocate memory for the virgin copy of the RAM.
3194	*/
3195	PGMMALLOCATEPAGESREQ pReq;
3196	int rc = GMMR3AllocatePagesPrepare(pVM, &pReq, cPages, GMMACCOUNT_BASE);
3197	AssertRCReturn(rc, rc);
3198
3199	for (uint32_t iPage = 0; iPage < cPages; iPage++)
3200	{
3201	pReq->aPages[iPage].HCPhysGCPhys = GCPhys + (iPage << PAGE_SHIFT);
3202	pReq->aPages[iPage].idPage = NIL_GMM_PAGEID;
3203	pReq->aPages[iPage].idSharedPage = NIL_GMM_PAGEID;
3204	}
3205
3206	rc = GMMR3AllocatePagesPerform(pVM, pReq);
3207	if (RT_FAILURE(rc))
3208	{
3209	GMMR3AllocatePagesCleanup(pReq);
3210	return rc;
3211	}
3212
3213	/*
3214	* Allocate the new ROM range and RAM range (if necessary).
3215	*/
3216	PPGMROMRANGE pRomNew;
3217	rc = MMHyperAlloc(pVM, RT_OFFSETOF(PGMROMRANGE, aPages[cPages]), 0, MM_TAG_PGM_PHYS, (void **)&pRomNew);
3218	if (RT_SUCCESS(rc))
3219	{
3220	PPGMRAMRANGE pRamNew = NULL;
3221	if (!fRamExists)
3222	rc = MMHyperAlloc(pVM, RT_OFFSETOF(PGMRAMRANGE, aPages[cPages]), sizeof(PGMPAGE), MM_TAG_PGM_PHYS, (void **)&pRamNew);
3223	if (RT_SUCCESS(rc))
3224	{
3225	/*
3226	* Initialize and insert the RAM range (if required).
3227	*/
3228	PPGMROMPAGE pRomPage = &pRomNew->aPages[0];
3229	if (!fRamExists)
3230	{
3231	pRamNew->pSelfR0 = MMHyperCCToR0(pVM, pRamNew);
3232	pRamNew->pSelfRC = MMHyperCCToRC(pVM, pRamNew);
3233	pRamNew->GCPhys = GCPhys;
3234	pRamNew->GCPhysLast = GCPhysLast;
3235	pRamNew->cb = cb;
3236	pRamNew->pszDesc = pszDesc;
3237	pRamNew->fFlags = PGM_RAM_RANGE_FLAGS_AD_HOC_ROM;
3238	pRamNew->pvR3 = NULL;
3239	pRamNew->paLSPages = NULL;
3240
3241	PPGMPAGE pPage = &pRamNew->aPages[0];
3242	for (uint32_t iPage = 0; iPage < cPages; iPage++, pPage++, pRomPage++)
3243	{
3244	PGM_PAGE_INIT(pPage,
3245	pReq->aPages[iPage].HCPhysGCPhys,
3246	pReq->aPages[iPage].idPage,
3247	PGMPAGETYPE_ROM,
3248	PGM_PAGE_STATE_ALLOCATED);
3249
3250	pRomPage->Virgin = *pPage;
3251	}
3252
3253	pVM->pgm.s.cAllPages += cPages;
3254	pgmR3PhysLinkRamRange(pVM, pRamNew, pRamPrev);
3255	}
3256	else
3257	{
3258	PPGMPAGE pPage = &pRam->aPages[(GCPhys - pRam->GCPhys) >> PAGE_SHIFT];
3259	for (uint32_t iPage = 0; iPage < cPages; iPage++, pPage++, pRomPage++)
3260	{
3261	PGM_PAGE_SET_TYPE(pVM, pPage, PGMPAGETYPE_ROM);
3262	PGM_PAGE_SET_HCPHYS(pVM, pPage, pReq->aPages[iPage].HCPhysGCPhys);
3263	PGM_PAGE_SET_STATE(pVM, pPage, PGM_PAGE_STATE_ALLOCATED);
3264	PGM_PAGE_SET_PAGEID(pVM, pPage, pReq->aPages[iPage].idPage);
3265	PGM_PAGE_SET_PDE_TYPE(pVM, pPage, PGM_PAGE_PDE_TYPE_DONTCARE);
3266	PGM_PAGE_SET_PTE_INDEX(pVM, pPage, 0);
3267	PGM_PAGE_SET_TRACKING(pVM, pPage, 0);
3268
3269	pRomPage->Virgin = *pPage;
3270	}
3271
3272	pRamNew = pRam;
3273
3274	pVM->pgm.s.cZeroPages -= cPages;
3275	}
3276	pVM->pgm.s.cPrivatePages += cPages;
3277
3278	/* Flush physical page map TLB. */
3279	pgmPhysInvalidatePageMapTLB(pVM);
3280
3281
3282	/*
3283	* !HACK ALERT! REM + (Shadowed) ROM ==> mess.
3284	*
3285	* If it's shadowed we'll register the handler after the ROM notification
3286	* so we get the access handler callbacks that we should. If it isn't
3287	* shadowed we'll do it the other way around to make REM use the built-in
3288	* ROM behavior and not the handler behavior (which is to route all access
3289	* to PGM atm).
3290	*/
3291	if (fFlags & PGMPHYS_ROM_FLAGS_SHADOWED)
3292	{
3293	#ifdef VBOX_WITH_REM
3294	REMR3NotifyPhysRomRegister(pVM, GCPhys, cb, NULL, true /* fShadowed */);
3295	#endif
3296	rc = PGMR3HandlerPhysicalRegister(pVM, PGMPHYSHANDLERTYPE_PHYSICAL_WRITE, GCPhys, GCPhysLast,
3297	pgmR3PhysRomWriteHandler, pRomNew,
3298	NULL, "pgmPhysRomWriteHandler", MMHyperCCToR0(pVM, pRomNew),
3299	NULL, "pgmPhysRomWriteHandler", MMHyperCCToRC(pVM, pRomNew), pszDesc);
3300	}
3301	else
3302	{
3303	rc = PGMR3HandlerPhysicalRegister(pVM, PGMPHYSHANDLERTYPE_PHYSICAL_WRITE, GCPhys, GCPhysLast,
3304	pgmR3PhysRomWriteHandler, pRomNew,
3305	NULL, "pgmPhysRomWriteHandler", MMHyperCCToR0(pVM, pRomNew),
3306	NULL, "pgmPhysRomWriteHandler", MMHyperCCToRC(pVM, pRomNew), pszDesc);
3307	#ifdef VBOX_WITH_REM
3308	REMR3NotifyPhysRomRegister(pVM, GCPhys, cb, NULL, false /* fShadowed */);
3309	#endif
3310	}
3311	if (RT_SUCCESS(rc))
3312	{
3313	/*
3314	* Copy the image over to the virgin pages.
3315	* This must be done after linking in the RAM range.
3316	*/
3317	size_t cbBinaryLeft = cbBinary;
3318	PPGMPAGE pRamPage = &pRamNew->aPages[(GCPhys - pRamNew->GCPhys) >> PAGE_SHIFT];
3319	for (uint32_t iPage = 0; iPage < cPages; iPage++, pRamPage++)
3320	{
3321	void *pvDstPage;
3322	rc = pgmPhysPageMap(pVM, pRamPage, GCPhys + (iPage << PAGE_SHIFT), &pvDstPage);
3323	if (RT_FAILURE(rc))
3324	{
3325	VMSetError(pVM, rc, RT_SRC_POS, "Failed to map virgin ROM page at %RGp", GCPhys);
3326	break;
3327	}
3328	if (cbBinaryLeft >= PAGE_SIZE)
3329	{
3330	memcpy(pvDstPage, (uint8_t const *)pvBinary + ((size_t)iPage << PAGE_SHIFT), PAGE_SIZE);
3331	cbBinaryLeft -= PAGE_SIZE;
3332	}
3333	else
3334	{
3335	ASMMemZeroPage(pvDstPage); /* (shouldn't be necessary, but can't hurt either) */
3336	if (cbBinaryLeft > 0)
3337	{
3338	memcpy(pvDstPage, (uint8_t const *)pvBinary + ((size_t)iPage << PAGE_SHIFT), cbBinaryLeft);
3339	cbBinaryLeft = 0;
3340	}
3341	}
3342	}
3343	if (RT_SUCCESS(rc))
3344	{
3345	/*
3346	* Initialize the ROM range.
3347	* Note that the Virgin member of the pages has already been initialized above.
3348	*/
3349	pRomNew->GCPhys = GCPhys;
3350	pRomNew->GCPhysLast = GCPhysLast;
3351	pRomNew->cb = cb;
3352	pRomNew->fFlags = fFlags;
3353	pRomNew->idSavedState = UINT8_MAX;
3354	pRomNew->cbOriginal = cbBinary;
3355	#ifdef VBOX_STRICT
3356	pRomNew->pvOriginal = fFlags & PGMPHYS_ROM_FLAGS_PERMANENT_BINARY
3357	? pvBinary : RTMemDup(pvBinary, cbBinary);
3358	#else
3359	pRomNew->pvOriginal = fFlags & PGMPHYS_ROM_FLAGS_PERMANENT_BINARY ? pvBinary : NULL;
3360	#endif
3361	pRomNew->pszDesc = pszDesc;
3362
3363	for (unsigned iPage = 0; iPage < cPages; iPage++)
3364	{
3365	PPGMROMPAGE pPage = &pRomNew->aPages[iPage];
3366	pPage->enmProt = PGMROMPROT_READ_ROM_WRITE_IGNORE;
3367	PGM_PAGE_INIT_ZERO(&pPage->Shadow, pVM, PGMPAGETYPE_ROM_SHADOW);
3368	}
3369
3370	/* update the page count stats for the shadow pages. */
3371	if (fFlags & PGMPHYS_ROM_FLAGS_SHADOWED)
3372	{
3373	pVM->pgm.s.cZeroPages += cPages;
3374	pVM->pgm.s.cAllPages += cPages;
3375	}
3376
3377	/*
3378	* Insert the ROM range, tell REM and return successfully.
3379	*/
3380	pRomNew->pNextR3 = pRom;
3381	pRomNew->pNextR0 = pRom ? MMHyperCCToR0(pVM, pRom) : NIL_RTR0PTR;
3382	pRomNew->pNextRC = pRom ? MMHyperCCToRC(pVM, pRom) : NIL_RTRCPTR;
3383
3384	if (pRomPrev)
3385	{
3386	pRomPrev->pNextR3 = pRomNew;
3387	pRomPrev->pNextR0 = MMHyperCCToR0(pVM, pRomNew);
3388	pRomPrev->pNextRC = MMHyperCCToRC(pVM, pRomNew);
3389	}
3390	else
3391	{
3392	pVM->pgm.s.pRomRangesR3 = pRomNew;
3393	pVM->pgm.s.pRomRangesR0 = MMHyperCCToR0(pVM, pRomNew);
3394	pVM->pgm.s.pRomRangesRC = MMHyperCCToRC(pVM, pRomNew);
3395	}
3396
3397	pgmPhysInvalidatePageMapTLB(pVM);
3398	GMMR3AllocatePagesCleanup(pReq);
3399	return VINF_SUCCESS;
3400	}
3401
3402	/* bail out */
3403
3404	int rc2 = PGMHandlerPhysicalDeregister(pVM, GCPhys);
3405	AssertRC(rc2);
3406	}
3407
3408	if (!fRamExists)
3409	{
3410	pgmR3PhysUnlinkRamRange2(pVM, pRamNew, pRamPrev);
3411	MMHyperFree(pVM, pRamNew);
3412	}
3413	}
3414	MMHyperFree(pVM, pRomNew);
3415	}
3416
3417	/** @todo Purge the mapping cache or something... */
3418	GMMR3FreeAllocatedPages(pVM, pReq);
3419	GMMR3AllocatePagesCleanup(pReq);
3420	return rc;
3421	}
3422
3423
3424	/**
3425	* Registers a ROM image.
3426	*
3427	* Shadowed ROM images requires double the amount of backing memory, so,
3428	* don't use that unless you have to. Shadowing of ROM images is process
3429	* where we can select where the reads go and where the writes go. On real
3430	* hardware the chipset provides means to configure this. We provide
3431	* PGMR3PhysProtectROM() for this purpose.
3432	*
3433	* A read-only copy of the ROM image will always be kept around while we
3434	* will allocate RAM pages for the changes on demand (unless all memory
3435	* is configured to be preallocated).
3436	*
3437	* @returns VBox status.
3438	* @param pVM Pointer to the VM.
3439	* @param pDevIns The device instance owning the ROM.
3440	* @param GCPhys First physical address in the range.
3441	* Must be page aligned!
3442	* @param cb The size of the range (in bytes).
3443	* Must be page aligned!
3444	* @param pvBinary Pointer to the binary data backing the ROM image.
3445	* @param cbBinary The size of the binary data pvBinary points to.
3446	* This must be less or equal to @a cb.
3447	* @param fFlags Mask of flags. PGMPHYS_ROM_FLAGS_SHADOWED
3448	* and/or PGMPHYS_ROM_FLAGS_PERMANENT_BINARY.
3449	* @param pszDesc Pointer to description string. This must not be freed.
3450	*
3451	* @remark There is no way to remove the rom, automatically on device cleanup or
3452	* manually from the device yet. This isn't difficult in any way, it's
3453	* just not something we expect to be necessary for a while.
3454	*/
3455	VMMR3DECL(int) PGMR3PhysRomRegister(PVM pVM, PPDMDEVINS pDevIns, RTGCPHYS GCPhys, RTGCPHYS cb,
3456	const void pvBinary, uint32_t cbBinary, uint32_t fFlags, const char pszDesc)
3457	{
3458	Log(("PGMR3PhysRomRegister: pDevIns=%p GCPhys=%RGp(-%RGp) cb=%RGp pvBinary=%p cbBinary=%#x fFlags=%#x pszDesc=%s\n",
3459	pDevIns, GCPhys, GCPhys + cb, cb, pvBinary, cbBinary, fFlags, pszDesc));
3460	pgmLock(pVM);
3461	int rc = pgmR3PhysRomRegister(pVM, pDevIns, GCPhys, cb, pvBinary, cbBinary, fFlags, pszDesc);
3462	pgmUnlock(pVM);
3463	return rc;
3464	}
3465
3466
3467	/**
3468	* \#PF Handler callback for ROM write accesses.
3469	*
3470	* @returns VINF_SUCCESS if the handler have carried out the operation.
3471	* @returns VINF_PGM_HANDLER_DO_DEFAULT if the caller should carry out the access operation.
3472	* @param pVM Pointer to the VM.
3473	* @param GCPhys The physical address the guest is writing to.
3474	* @param pvPhys The HC mapping of that address.
3475	* @param pvBuf What the guest is reading/writing.
3476	* @param cbBuf How much it's reading/writing.
3477	* @param enmAccessType The access type.
3478	* @param pvUser User argument.
3479	*/
3480	static DECLCALLBACK(int) pgmR3PhysRomWriteHandler(PVM pVM, RTGCPHYS GCPhys, void pvPhys, void pvBuf, size_t cbBuf,
3481	PGMACCESSTYPE enmAccessType, void *pvUser)
3482	{
3483	PPGMROMRANGE pRom = (PPGMROMRANGE)pvUser;
3484	const uint32_t iPage = (GCPhys - pRom->GCPhys) >> PAGE_SHIFT;
3485	Assert(iPage < (pRom->cb >> PAGE_SHIFT));
3486	PPGMROMPAGE pRomPage = &pRom->aPages[iPage];
3487	Log5(("pgmR3PhysRomWriteHandler: %d %c %#08RGp %#04zx\n", pRomPage->enmProt, enmAccessType == PGMACCESSTYPE_READ ? 'R' : 'W', GCPhys, cbBuf));
3488	NOREF(pvPhys);
3489
3490	if (enmAccessType == PGMACCESSTYPE_READ)
3491	{
3492	switch (pRomPage->enmProt)
3493	{
3494	/*
3495	* Take the default action.
3496	*/
3497	case PGMROMPROT_READ_ROM_WRITE_IGNORE:
3498	case PGMROMPROT_READ_RAM_WRITE_IGNORE:
3499	case PGMROMPROT_READ_ROM_WRITE_RAM:
3500	case PGMROMPROT_READ_RAM_WRITE_RAM:
3501	return VINF_PGM_HANDLER_DO_DEFAULT;
3502
3503	default:
3504	AssertMsgFailedReturn(("enmProt=%d iPage=%d GCPhys=%RGp\n",
3505	pRom->aPages[iPage].enmProt, iPage, GCPhys),
3506	VERR_IPE_NOT_REACHED_DEFAULT_CASE);
3507	}
3508	}
3509	else
3510	{
3511	Assert(enmAccessType == PGMACCESSTYPE_WRITE);
3512	switch (pRomPage->enmProt)
3513	{
3514	/*
3515	* Ignore writes.
3516	*/
3517	case PGMROMPROT_READ_ROM_WRITE_IGNORE:
3518	case PGMROMPROT_READ_RAM_WRITE_IGNORE:
3519	return VINF_SUCCESS;
3520
3521	/*
3522	* Write to the RAM page.
3523	*/
3524	case PGMROMPROT_READ_ROM_WRITE_RAM:
3525	case PGMROMPROT_READ_RAM_WRITE_RAM: /* yes this will get here too, it's way simpler that way. */
3526	{
3527	/* This should be impossible now, pvPhys doesn't work cross page anylonger. */
3528	Assert(((GCPhys - pRom->GCPhys + cbBuf - 1) >> PAGE_SHIFT) == iPage);
3529
3530	/*
3531	* Take the lock, do lazy allocation, map the page and copy the data.
3532	*
3533	* Note that we have to bypass the mapping TLB since it works on
3534	* guest physical addresses and entering the shadow page would
3535	* kind of screw things up...
3536	*/
3537	int rc = pgmLock(pVM);
3538	AssertRC(rc);
3539
3540	PPGMPAGE pShadowPage = &pRomPage->Shadow;
3541	if (!PGMROMPROT_IS_ROM(pRomPage->enmProt))
3542	{
3543	pShadowPage = pgmPhysGetPage(pVM, GCPhys);
3544	AssertLogRelReturn(pShadowPage, VERR_PGM_PHYS_PAGE_GET_IPE);
3545	}
3546
3547	void *pvDstPage;
3548	rc = pgmPhysPageMakeWritableAndMap(pVM, pShadowPage, GCPhys & X86_PTE_PG_MASK, &pvDstPage);
3549	if (RT_SUCCESS(rc))
3550	{
3551	memcpy((uint8_t *)pvDstPage + (GCPhys & PAGE_OFFSET_MASK), pvBuf, cbBuf);
3552	pRomPage->LiveSave.fWrittenTo = true;
3553	}
3554
3555	pgmUnlock(pVM);
3556	return rc;
3557	}
3558
3559	default:
3560	AssertMsgFailedReturn(("enmProt=%d iPage=%d GCPhys=%RGp\n",
3561	pRom->aPages[iPage].enmProt, iPage, GCPhys),
3562	VERR_IPE_NOT_REACHED_DEFAULT_CASE);
3563	}
3564	}
3565	}
3566
3567
3568	/**
3569	* Called by PGMR3MemSetup to reset the shadow, switch to the virgin, and verify
3570	* that the virgin part is untouched.
3571	*
3572	* This is done after the normal memory has been cleared.
3573	*
3574	* ASSUMES that the caller owns the PGM lock.
3575	*
3576	* @param pVM Pointer to the VM.
3577	*/
3578	int pgmR3PhysRomReset(PVM pVM)
3579	{
3580	PGM_LOCK_ASSERT_OWNER(pVM);
3581	for (PPGMROMRANGE pRom = pVM->pgm.s.pRomRangesR3; pRom; pRom = pRom->pNextR3)
3582	{
3583	const uint32_t cPages = pRom->cb >> PAGE_SHIFT;
3584
3585	if (pRom->fFlags & PGMPHYS_ROM_FLAGS_SHADOWED)
3586	{
3587	/*
3588	* Reset the physical handler.
3589	*/
3590	int rc = PGMR3PhysRomProtect(pVM, pRom->GCPhys, pRom->cb, PGMROMPROT_READ_ROM_WRITE_IGNORE);
3591	AssertRCReturn(rc, rc);
3592
3593	/*
3594	* What we do with the shadow pages depends on the memory
3595	* preallocation option. If not enabled, we'll just throw
3596	* out all the dirty pages and replace them by the zero page.
3597	*/
3598	if (!pVM->pgm.s.fRamPreAlloc)
3599	{
3600	/* Free the dirty pages. */
3601	uint32_t cPendingPages = 0;
3602	PGMMFREEPAGESREQ pReq;
3603	rc = GMMR3FreePagesPrepare(pVM, &pReq, PGMPHYS_FREE_PAGE_BATCH_SIZE, GMMACCOUNT_BASE);
3604	AssertRCReturn(rc, rc);
3605
3606	for (uint32_t iPage = 0; iPage < cPages; iPage++)
3607	if ( !PGM_PAGE_IS_ZERO(&pRom->aPages[iPage].Shadow)
3608	&& !PGM_PAGE_IS_BALLOONED(&pRom->aPages[iPage].Shadow))
3609	{
3610	Assert(PGM_PAGE_GET_STATE(&pRom->aPages[iPage].Shadow) == PGM_PAGE_STATE_ALLOCATED);
3611	rc = pgmPhysFreePage(pVM, pReq, &cPendingPages, &pRom->aPages[iPage].Shadow,
3612	pRom->GCPhys + (iPage << PAGE_SHIFT));
3613	AssertLogRelRCReturn(rc, rc);
3614	}
3615
3616	if (cPendingPages)
3617	{
3618	rc = GMMR3FreePagesPerform(pVM, pReq, cPendingPages);
3619	AssertLogRelRCReturn(rc, rc);
3620	}
3621	GMMR3FreePagesCleanup(pReq);
3622	}
3623	else
3624	{
3625	/* clear all the shadow pages. */
3626	for (uint32_t iPage = 0; iPage < cPages; iPage++)
3627	{
3628	if (PGM_PAGE_IS_ZERO(&pRom->aPages[iPage].Shadow))
3629	continue;
3630	Assert(!PGM_PAGE_IS_BALLOONED(&pRom->aPages[iPage].Shadow));
3631	void *pvDstPage;
3632	const RTGCPHYS GCPhys = pRom->GCPhys + (iPage << PAGE_SHIFT);
3633	rc = pgmPhysPageMakeWritableAndMap(pVM, &pRom->aPages[iPage].Shadow, GCPhys, &pvDstPage);
3634	if (RT_FAILURE(rc))
3635	break;
3636	ASMMemZeroPage(pvDstPage);
3637	}
3638	AssertRCReturn(rc, rc);
3639	}
3640	}
3641
3642	#ifdef VBOX_STRICT
3643	/*
3644	* Verify that the virgin page is unchanged if possible.
3645	*/
3646	if (pRom->pvOriginal)
3647	{
3648	size_t cbSrcLeft = pRom->cbOriginal;
3649	uint8_t const pbSrcPage = (uint8_t const )pRom->pvOriginal;
3650	for (uint32_t iPage = 0; iPage < cPages && cbSrcLeft > 0; iPage++, pbSrcPage += PAGE_SIZE)
3651	{
3652	const RTGCPHYS GCPhys = pRom->GCPhys + (iPage << PAGE_SHIFT);
3653	void const *pvDstPage;
3654	int rc = pgmPhysPageMapReadOnly(pVM, &pRom->aPages[iPage].Virgin, GCPhys, &pvDstPage);
3655	if (RT_FAILURE(rc))
3656	break;
3657
3658	if (memcmp(pvDstPage, pbSrcPage, RT_MIN(cbSrcLeft, PAGE_SIZE)))
3659	LogRel(("pgmR3PhysRomReset: %RGp rom page changed (%s) - loaded saved state?\n",
3660	GCPhys, pRom->pszDesc));
3661	cbSrcLeft -= RT_MIN(cbSrcLeft, PAGE_SIZE);
3662	}
3663	}
3664	#endif
3665	}
3666
3667	return VINF_SUCCESS;
3668	}
3669
3670
3671	/**
3672	* Called by PGMR3Term to free resources.
3673	*
3674	* ASSUMES that the caller owns the PGM lock.
3675	*
3676	* @param pVM Pointer to the VM.
3677	*/
3678	void pgmR3PhysRomTerm(PVM pVM)
3679	{
3680	#ifdef RT_STRICT
3681	/*
3682	* Free the heap copy of the original bits.
3683	*/
3684	for (PPGMROMRANGE pRom = pVM->pgm.s.pRomRangesR3; pRom; pRom = pRom->pNextR3)
3685	{
3686	if ( pRom->pvOriginal
3687	&& !(pRom->fFlags & PGMPHYS_ROM_FLAGS_PERMANENT_BINARY))
3688	{
3689	RTMemFree((void *)pRom->pvOriginal);
3690	pRom->pvOriginal = NULL;
3691	}
3692	}
3693	#endif
3694	}
3695
3696
3697	/**
3698	* Change the shadowing of a range of ROM pages.
3699	*
3700	* This is intended for implementing chipset specific memory registers
3701	* and will not be very strict about the input. It will silently ignore
3702	* any pages that are not the part of a shadowed ROM.
3703	*
3704	* @returns VBox status code.
3705	* @retval VINF_PGM_SYNC_CR3
3706	*
3707	* @param pVM Pointer to the VM.
3708	* @param GCPhys Where to start. Page aligned.
3709	* @param cb How much to change. Page aligned.
3710	* @param enmProt The new ROM protection.
3711	*/
3712	VMMR3DECL(int) PGMR3PhysRomProtect(PVM pVM, RTGCPHYS GCPhys, RTGCPHYS cb, PGMROMPROT enmProt)
3713	{
3714	/*
3715	* Check input
3716	*/
3717	if (!cb)
3718	return VINF_SUCCESS;
3719	AssertReturn(!(GCPhys & PAGE_OFFSET_MASK), VERR_INVALID_PARAMETER);
3720	AssertReturn(!(cb & PAGE_OFFSET_MASK), VERR_INVALID_PARAMETER);
3721	RTGCPHYS GCPhysLast = GCPhys + (cb - 1);
3722	AssertReturn(GCPhysLast > GCPhys, VERR_INVALID_PARAMETER);
3723	AssertReturn(enmProt >= PGMROMPROT_INVALID && enmProt <= PGMROMPROT_END, VERR_INVALID_PARAMETER);
3724
3725	/*
3726	* Process the request.
3727	*/
3728	pgmLock(pVM);
3729	int rc = VINF_SUCCESS;
3730	bool fFlushTLB = false;
3731	for (PPGMROMRANGE pRom = pVM->pgm.s.pRomRangesR3; pRom; pRom = pRom->pNextR3)
3732	{
3733	if ( GCPhys <= pRom->GCPhysLast
3734	&& GCPhysLast >= pRom->GCPhys
3735	&& (pRom->fFlags & PGMPHYS_ROM_FLAGS_SHADOWED))
3736	{
3737	/*
3738	* Iterate the relevant pages and make necessary the changes.
3739	*/
3740	bool fChanges = false;
3741	uint32_t const cPages = pRom->GCPhysLast <= GCPhysLast
3742	? pRom->cb >> PAGE_SHIFT
3743	: (GCPhysLast - pRom->GCPhys + 1) >> PAGE_SHIFT;
3744	for (uint32_t iPage = (GCPhys - pRom->GCPhys) >> PAGE_SHIFT;
3745	iPage < cPages;
3746	iPage++)
3747	{
3748	PPGMROMPAGE pRomPage = &pRom->aPages[iPage];
3749	if (PGMROMPROT_IS_ROM(pRomPage->enmProt) != PGMROMPROT_IS_ROM(enmProt))
3750	{
3751	fChanges = true;
3752
3753	/* flush references to the page. */
3754	PPGMPAGE pRamPage = pgmPhysGetPage(pVM, pRom->GCPhys + (iPage << PAGE_SHIFT));
3755	int rc2 = pgmPoolTrackUpdateGCPhys(pVM, pRom->GCPhys + (iPage << PAGE_SHIFT), pRamPage,
3756	true /fFlushPTEs/, &fFlushTLB);
3757	if (rc2 != VINF_SUCCESS && (rc == VINF_SUCCESS \|\| RT_FAILURE(rc2)))
3758	rc = rc2;
3759
3760	PPGMPAGE pOld = PGMROMPROT_IS_ROM(pRomPage->enmProt) ? &pRomPage->Virgin : &pRomPage->Shadow;
3761	PPGMPAGE pNew = PGMROMPROT_IS_ROM(pRomPage->enmProt) ? &pRomPage->Shadow : &pRomPage->Virgin;
3762
3763	pOld = pRamPage;
3764	pRamPage = pNew;
3765	/** @todo preserve the volatile flags (handlers) when these have been moved out of HCPhys! */
3766	}
3767	pRomPage->enmProt = enmProt;
3768	}
3769
3770	/*
3771	* Reset the access handler if we made changes, no need
3772	* to optimize this.
3773	*/
3774	if (fChanges)
3775	{
3776	int rc2 = PGMHandlerPhysicalReset(pVM, pRom->GCPhys);
3777	if (RT_FAILURE(rc2))
3778	{
3779	pgmUnlock(pVM);
3780	AssertRC(rc);
3781	return rc2;
3782	}
3783	}
3784
3785	/* Advance - cb isn't updated. */
3786	GCPhys = pRom->GCPhys + (cPages << PAGE_SHIFT);
3787	}
3788	}
3789	pgmUnlock(pVM);
3790	if (fFlushTLB)
3791	PGM_INVL_ALL_VCPU_TLBS(pVM);
3792
3793	return rc;
3794	}
3795
3796
3797	/**
3798	* Sets the Address Gate 20 state.
3799	*
3800	* @param pVCpu Pointer to the VMCPU.
3801	* @param fEnable True if the gate should be enabled.
3802	* False if the gate should be disabled.
3803	*/
3804	VMMDECL(void) PGMR3PhysSetA20(PVMCPU pVCpu, bool fEnable)
3805	{
3806	LogFlow(("PGMR3PhysSetA20 %d (was %d)\n", fEnable, pVCpu->pgm.s.fA20Enabled));
3807	if (pVCpu->pgm.s.fA20Enabled != fEnable)
3808	{
3809	pVCpu->pgm.s.fA20Enabled = fEnable;
3810	pVCpu->pgm.s.GCPhysA20Mask = ~(RTGCPHYS)(!fEnable << 20);
3811	#ifdef VBOX_WITH_REM
3812	REMR3A20Set(pVCpu->pVMR3, pVCpu, fEnable);
3813	#endif
3814	#ifdef PGM_WITH_A20
3815	pVCpu->pgm.s.fSyncFlags \|= PGM_SYNC_UPDATE_PAGE_BIT_VIRTUAL;
3816	VMCPU_FF_SET(pVCpu, VMCPU_FF_PGM_SYNC_CR3);
3817	pgmR3RefreshShadowModeAfterA20Change(pVCpu);
3818	HMFlushTLB(pVCpu);
3819	#endif
3820	STAM_REL_COUNTER_INC(&pVCpu->pgm.s.cA20Changes);
3821	}
3822	}
3823
3824
3825	/**
3826	* Tree enumeration callback for dealing with age rollover.
3827	* It will perform a simple compression of the current age.
3828	*/
3829	static DECLCALLBACK(int) pgmR3PhysChunkAgeingRolloverCallback(PAVLU32NODECORE pNode, void *pvUser)
3830	{
3831	/* Age compression - ASSUMES iNow == 4. */
3832	PPGMCHUNKR3MAP pChunk = (PPGMCHUNKR3MAP)pNode;
3833	if (pChunk->iLastUsed >= UINT32_C(0xffffff00))
3834	pChunk->iLastUsed = 3;
3835	else if (pChunk->iLastUsed >= UINT32_C(0xfffff000))
3836	pChunk->iLastUsed = 2;
3837	else if (pChunk->iLastUsed)
3838	pChunk->iLastUsed = 1;
3839	else /* iLastUsed = 0 */
3840	pChunk->iLastUsed = 4;
3841
3842	NOREF(pvUser);
3843	return 0;
3844	}
3845
3846
3847	/**
3848	* The structure passed in the pvUser argument of pgmR3PhysChunkUnmapCandidateCallback().
3849	*/
3850	typedef struct PGMR3PHYSCHUNKUNMAPCB
3851	{
3852	PVM pVM; /*< Pointer to the VM. /
3853	PPGMCHUNKR3MAP pChunk; /*< The chunk to unmap. /
3854	} PGMR3PHYSCHUNKUNMAPCB, *PPGMR3PHYSCHUNKUNMAPCB;
3855
3856
3857	/**
3858	* Callback used to find the mapping that's been unused for
3859	* the longest time.
3860	*/
3861	static DECLCALLBACK(int) pgmR3PhysChunkUnmapCandidateCallback(PAVLU32NODECORE pNode, void *pvUser)
3862	{
3863	PPGMCHUNKR3MAP pChunk = (PPGMCHUNKR3MAP)pNode;
3864	PPGMR3PHYSCHUNKUNMAPCB pArg = (PPGMR3PHYSCHUNKUNMAPCB)pvUser;
3865
3866	/*
3867	* Check for locks and compare when last used.
3868	*/
3869	if (pChunk->cRefs)
3870	return 0;
3871	if (pChunk->cPermRefs)
3872	return 0;
3873	if ( pArg->pChunk
3874	&& pChunk->iLastUsed >= pArg->pChunk->iLastUsed)
3875	return 0;
3876
3877	/*
3878	* Check that it's not in any of the TLBs.
3879	*/
3880	PVM pVM = pArg->pVM;
3881	if ( pVM->pgm.s.ChunkR3Map.Tlb.aEntries[PGM_CHUNKR3MAPTLB_IDX(pChunk->Core.Key)].idChunk
3882	== pChunk->Core.Key)
3883	{
3884	pChunk = NULL;
3885	return 0;
3886	}
3887	#ifdef VBOX_STRICT
3888	for (unsigned i = 0; i < RT_ELEMENTS(pVM->pgm.s.ChunkR3Map.Tlb.aEntries); i++)
3889	{
3890	Assert(pVM->pgm.s.ChunkR3Map.Tlb.aEntries[i].pChunk != pChunk);
3891	Assert(pVM->pgm.s.ChunkR3Map.Tlb.aEntries[i].idChunk != pChunk->Core.Key);
3892	}
3893	#endif
3894
3895	for (unsigned i = 0; i < RT_ELEMENTS(pVM->pgm.s.PhysTlbHC.aEntries); i++)
3896	if (pVM->pgm.s.PhysTlbHC.aEntries[i].pMap == pChunk)
3897	return 0;
3898
3899	pArg->pChunk = pChunk;
3900	return 0;
3901	}
3902
3903
3904	/**
3905	* Finds a good candidate for unmapping when the ring-3 mapping cache is full.
3906	*
3907	* The candidate will not be part of any TLBs, so no need to flush
3908	* anything afterwards.
3909	*
3910	* @returns Chunk id.
3911	* @param pVM Pointer to the VM.
3912	*/
3913	static int32_t pgmR3PhysChunkFindUnmapCandidate(PVM pVM)
3914	{
3915	PGM_LOCK_ASSERT_OWNER(pVM);
3916
3917	/*
3918	* Enumerate the age tree starting with the left most node.
3919	*/
3920	STAM_PROFILE_START(&pVM->pgm.s.CTX_SUFF(pStats)->StatChunkFindCandidate, a);
3921	PGMR3PHYSCHUNKUNMAPCB Args;
3922	Args.pVM = pVM;
3923	Args.pChunk = NULL;
3924	RTAvlU32DoWithAll(&pVM->pgm.s.ChunkR3Map.pTree, true /fFromLeft/, pgmR3PhysChunkUnmapCandidateCallback, &Args);
3925	Assert(Args.pChunk);
3926	if (Args.pChunk)
3927	{
3928	Assert(Args.pChunk->cRefs == 0);
3929	Assert(Args.pChunk->cPermRefs == 0);
3930	STAM_PROFILE_STOP(&pVM->pgm.s.CTX_SUFF(pStats)->StatChunkFindCandidate, a);
3931	return Args.pChunk->Core.Key;
3932	}
3933
3934	STAM_PROFILE_STOP(&pVM->pgm.s.CTX_SUFF(pStats)->StatChunkFindCandidate, a);
3935	return INT32_MAX;
3936	}
3937
3938
3939	/**
3940	* Rendezvous callback used by pgmR3PhysUnmapChunk that unmaps a chunk
3941	*
3942	* This is only called on one of the EMTs while the other ones are waiting for
3943	* it to complete this function.
3944	*
3945	* @returns VINF_SUCCESS (VBox strict status code).
3946	* @param pVM Pointer to the VM.
3947	* @param pVCpu The VMCPU for the EMT we're being called on. Unused.
3948	* @param pvUser User pointer. Unused
3949	*
3950	*/
3951	static DECLCALLBACK(VBOXSTRICTRC) pgmR3PhysUnmapChunkRendezvous(PVM pVM, PVMCPU pVCpu, void *pvUser)
3952	{
3953	int rc = VINF_SUCCESS;
3954	pgmLock(pVM);
3955	NOREF(pVCpu); NOREF(pvUser);
3956
3957	if (pVM->pgm.s.ChunkR3Map.c >= pVM->pgm.s.ChunkR3Map.cMax)
3958	{
3959	/* Flush the pgm pool cache; call the internal rendezvous handler as we're already in a rendezvous handler here. */
3960	/** @todo also not really efficient to unmap a chunk that contains PD
3961	* or PT pages. */
3962	pgmR3PoolClearAllRendezvous(pVM, &pVM->aCpus[0], NULL /* no need to flush the REM TLB as we already did that above */);
3963
3964	/*
3965	* Request the ring-0 part to unmap a chunk to make space in the mapping cache.
3966	*/
3967	GMMMAPUNMAPCHUNKREQ Req;
3968	Req.Hdr.u32Magic = SUPVMMR0REQHDR_MAGIC;
3969	Req.Hdr.cbReq = sizeof(Req);
3970	Req.pvR3 = NULL;
3971	Req.idChunkMap = NIL_GMM_CHUNKID;
3972	Req.idChunkUnmap = pgmR3PhysChunkFindUnmapCandidate(pVM);
3973	if (Req.idChunkUnmap != INT32_MAX)
3974	{
3975	STAM_PROFILE_START(&pVM->pgm.s.CTX_SUFF(pStats)->StatChunkUnmap, a);
3976	rc = VMMR3CallR0(pVM, VMMR0_DO_GMM_MAP_UNMAP_CHUNK, 0, &Req.Hdr);
3977	STAM_PROFILE_STOP(&pVM->pgm.s.CTX_SUFF(pStats)->StatChunkUnmap, a);
3978	if (RT_SUCCESS(rc))
3979	{
3980	/*
3981	* Remove the unmapped one.
3982	*/
3983	PPGMCHUNKR3MAP pUnmappedChunk = (PPGMCHUNKR3MAP)RTAvlU32Remove(&pVM->pgm.s.ChunkR3Map.pTree, Req.idChunkUnmap);
3984	AssertRelease(pUnmappedChunk);
3985	AssertRelease(!pUnmappedChunk->cRefs);
3986	AssertRelease(!pUnmappedChunk->cPermRefs);
3987	pUnmappedChunk->pv = NULL;
3988	pUnmappedChunk->Core.Key = UINT32_MAX;
3989	#ifdef VBOX_WITH_2X_4GB_ADDR_SPACE
3990	MMR3HeapFree(pUnmappedChunk);
3991	#else
3992	MMR3UkHeapFree(pVM, pUnmappedChunk, MM_TAG_PGM_CHUNK_MAPPING);
3993	#endif
3994	pVM->pgm.s.ChunkR3Map.c--;
3995	pVM->pgm.s.cUnmappedChunks++;
3996
3997	/*
3998	* Flush dangling PGM pointers (R3 & R0 ptrs to GC physical addresses).
3999	*/
4000	/** todo: we should not flush chunks which include cr3 mappings. */
4001	for (VMCPUID idCpu = 0; idCpu < pVM->cCpus; idCpu++)
4002	{
4003	PPGMCPU pPGM = &pVM->aCpus[idCpu].pgm.s;
4004
4005	pPGM->pGst32BitPdR3 = NULL;
4006	pPGM->pGstPaePdptR3 = NULL;
4007	pPGM->pGstAmd64Pml4R3 = NULL;
4008	#ifndef VBOX_WITH_2X_4GB_ADDR_SPACE
4009	pPGM->pGst32BitPdR0 = NIL_RTR0PTR;
4010	pPGM->pGstPaePdptR0 = NIL_RTR0PTR;
4011	pPGM->pGstAmd64Pml4R0 = NIL_RTR0PTR;
4012	#endif
4013	for (unsigned i = 0; i < RT_ELEMENTS(pPGM->apGstPaePDsR3); i++)
4014	{
4015	pPGM->apGstPaePDsR3[i] = NULL;
4016	#ifndef VBOX_WITH_2X_4GB_ADDR_SPACE
4017	pPGM->apGstPaePDsR0[i] = NIL_RTR0PTR;
4018	#endif
4019	}
4020
4021	/* Flush REM TLBs. */
4022	CPUMSetChangedFlags(&pVM->aCpus[idCpu], CPUM_CHANGED_GLOBAL_TLB_FLUSH);
4023	}
4024	#ifdef VBOX_WITH_REM
4025	/* Flush REM translation blocks. */
4026	REMFlushTBs(pVM);
4027	#endif
4028	}
4029	}
4030	}
4031	pgmUnlock(pVM);
4032	return rc;
4033	}
4034
4035	/**
4036	* Unmap a chunk to free up virtual address space (request packet handler for pgmR3PhysChunkMap)
4037	*
4038	* @returns VBox status code.
4039	* @param pVM Pointer to the VM.
4040	*/
4041	void pgmR3PhysUnmapChunk(PVM pVM)
4042	{
4043	int rc = VMMR3EmtRendezvous(pVM, VMMEMTRENDEZVOUS_FLAGS_TYPE_ONCE, pgmR3PhysUnmapChunkRendezvous, NULL);
4044	AssertRC(rc);
4045	}
4046
4047
4048	/**
4049	* Maps the given chunk into the ring-3 mapping cache.
4050	*
4051	* This will call ring-0.
4052	*
4053	* @returns VBox status code.
4054	* @param pVM Pointer to the VM.
4055	* @param idChunk The chunk in question.
4056	* @param ppChunk Where to store the chunk tracking structure.
4057	*
4058	* @remarks Called from within the PGM critical section.
4059	* @remarks Can be called from any thread!
4060	*/
4061	int pgmR3PhysChunkMap(PVM pVM, uint32_t idChunk, PPPGMCHUNKR3MAP ppChunk)
4062	{
4063	int rc;
4064
4065	PGM_LOCK_ASSERT_OWNER(pVM);
4066
4067	/*
4068	* Move the chunk time forward.
4069	*/
4070	pVM->pgm.s.ChunkR3Map.iNow++;
4071	if (pVM->pgm.s.ChunkR3Map.iNow == 0)
4072	{
4073	pVM->pgm.s.ChunkR3Map.iNow = 4;
4074	RTAvlU32DoWithAll(&pVM->pgm.s.ChunkR3Map.pTree, true /fFromLeft/, pgmR3PhysChunkAgeingRolloverCallback, NULL);
4075	}
4076
4077	/*
4078	* Allocate a new tracking structure first.
4079	*/
4080	#ifdef VBOX_WITH_2X_4GB_ADDR_SPACE
4081	PPGMCHUNKR3MAP pChunk = (PPGMCHUNKR3MAP)MMR3HeapAllocZ(pVM, MM_TAG_PGM_CHUNK_MAPPING, sizeof(*pChunk));
4082	#else
4083	PPGMCHUNKR3MAP pChunk = (PPGMCHUNKR3MAP)MMR3UkHeapAllocZ(pVM, MM_TAG_PGM_CHUNK_MAPPING, sizeof(*pChunk), NULL);
4084	#endif
4085	AssertReturn(pChunk, VERR_NO_MEMORY);
4086	pChunk->Core.Key = idChunk;
4087	pChunk->iLastUsed = pVM->pgm.s.ChunkR3Map.iNow;
4088
4089	/*
4090	* Request the ring-0 part to map the chunk in question.
4091	*/
4092	GMMMAPUNMAPCHUNKREQ Req;
4093	Req.Hdr.u32Magic = SUPVMMR0REQHDR_MAGIC;
4094	Req.Hdr.cbReq = sizeof(Req);
4095	Req.pvR3 = NULL;
4096	Req.idChunkMap = idChunk;
4097	Req.idChunkUnmap = NIL_GMM_CHUNKID;
4098
4099	/* Must be callable from any thread, so can't use VMMR3CallR0. */
4100	STAM_PROFILE_START(&pVM->pgm.s.CTX_SUFF(pStats)->StatChunkMap, a);
4101	rc = SUPR3CallVMMR0Ex(pVM->pVMR0, NIL_VMCPUID, VMMR0_DO_GMM_MAP_UNMAP_CHUNK, 0, &Req.Hdr);
4102	STAM_PROFILE_STOP(&pVM->pgm.s.CTX_SUFF(pStats)->StatChunkMap, a);
4103	if (RT_SUCCESS(rc))
4104	{
4105	pChunk->pv = Req.pvR3;
4106
4107	/*
4108	* If we're running out of virtual address space, then we should
4109	* unmap another chunk.
4110	*
4111	* Currently, an unmap operation requires that all other virtual CPUs
4112	* are idling and not by chance making use of the memory we're
4113	* unmapping. So, we create an async unmap operation here.
4114	*
4115	* Now, when creating or restoring a saved state this wont work very
4116	* well since we may want to restore all guest RAM + a little something.
4117	* So, we have to do the unmap synchronously. Fortunately for us
4118	* though, during these operations the other virtual CPUs are inactive
4119	* and it should be safe to do this.
4120	*/
4121	/** @todo Eventually we should lock all memory when used and do
4122	* map+unmap as one kernel call without any rendezvous or
4123	* other precautions. */
4124	if (pVM->pgm.s.ChunkR3Map.c + 1 >= pVM->pgm.s.ChunkR3Map.cMax)
4125	{
4126	switch (VMR3GetState(pVM))
4127	{
4128	case VMSTATE_LOADING:
4129	case VMSTATE_SAVING:
4130	{
4131	PVMCPU pVCpu = VMMGetCpu(pVM);
4132	if ( pVCpu
4133	&& pVM->pgm.s.cDeprecatedPageLocks == 0)
4134	{
4135	pgmR3PhysUnmapChunkRendezvous(pVM, pVCpu, NULL);
4136	break;
4137	}
4138	/* fall thru */
4139	}
4140	default:
4141	rc = VMR3ReqCallNoWait(pVM, VMCPUID_ANY_QUEUE, (PFNRT)pgmR3PhysUnmapChunk, 1, pVM);
4142	AssertRC(rc);
4143	break;
4144	}
4145	}
4146
4147	/*
4148	* Update the tree. We must do this after any unmapping to make sure
4149	* the chunk we're going to return isn't unmapped by accident.
4150	*/
4151	AssertPtr(Req.pvR3);
4152	bool fRc = RTAvlU32Insert(&pVM->pgm.s.ChunkR3Map.pTree, &pChunk->Core);
4153	AssertRelease(fRc);
4154	pVM->pgm.s.ChunkR3Map.c++;
4155	pVM->pgm.s.cMappedChunks++;
4156	}
4157	else
4158	{
4159	/** @todo this may fail because of /proc/sys/vm/max_map_count, so we
4160	* should probably restrict ourselves on linux. */
4161	AssertRC(rc);
4162	#ifdef VBOX_WITH_2X_4GB_ADDR_SPACE
4163	MMR3HeapFree(pChunk);
4164	#else
4165	MMR3UkHeapFree(pVM, pChunk, MM_TAG_PGM_CHUNK_MAPPING);
4166	#endif
4167	pChunk = NULL;
4168	}
4169
4170	*ppChunk = pChunk;
4171	return rc;
4172	}
4173
4174
4175	/**
4176	* For VMMCALLRING3_PGM_MAP_CHUNK, considered internal.
4177	*
4178	* @returns see pgmR3PhysChunkMap.
4179	* @param pVM Pointer to the VM.
4180	* @param idChunk The chunk to map.
4181	*/
4182	VMMR3DECL(int) PGMR3PhysChunkMap(PVM pVM, uint32_t idChunk)
4183	{
4184	PPGMCHUNKR3MAP pChunk;
4185	int rc;
4186
4187	pgmLock(pVM);
4188	rc = pgmR3PhysChunkMap(pVM, idChunk, &pChunk);
4189	pgmUnlock(pVM);
4190	return rc;
4191	}
4192
4193
4194	/**
4195	* Invalidates the TLB for the ring-3 mapping cache.
4196	*
4197	* @param pVM Pointer to the VM.
4198	*/
4199	VMMR3DECL(void) PGMR3PhysChunkInvalidateTLB(PVM pVM)
4200	{
4201	pgmLock(pVM);
4202	for (unsigned i = 0; i < RT_ELEMENTS(pVM->pgm.s.ChunkR3Map.Tlb.aEntries); i++)
4203	{
4204	pVM->pgm.s.ChunkR3Map.Tlb.aEntries[i].idChunk = NIL_GMM_CHUNKID;
4205	pVM->pgm.s.ChunkR3Map.Tlb.aEntries[i].pChunk = NULL;
4206	}
4207	/* The page map TLB references chunks, so invalidate that one too. */
4208	pgmPhysInvalidatePageMapTLB(pVM);
4209	pgmUnlock(pVM);
4210	}
4211
4212
4213	/**
4214	* Response to VMMCALLRING3_PGM_ALLOCATE_LARGE_HANDY_PAGE to allocate a large
4215	* (2MB) page for use with a nested paging PDE.
4216	*
4217	* @returns The following VBox status codes.
4218	* @retval VINF_SUCCESS on success.
4219	* @retval VINF_EM_NO_MEMORY if we're out of memory.
4220	*
4221	* @param pVM Pointer to the VM.
4222	* @param GCPhys GC physical start address of the 2 MB range
4223	*/
4224	VMMR3DECL(int) PGMR3PhysAllocateLargeHandyPage(PVM pVM, RTGCPHYS GCPhys)
4225	{
4226	#ifdef PGM_WITH_LARGE_PAGES
4227	uint64_t u64TimeStamp1, u64TimeStamp2;
4228
4229	pgmLock(pVM);
4230
4231	STAM_PROFILE_START(&pVM->pgm.s.CTX_SUFF(pStats)->StatAllocLargePage, a);
4232	u64TimeStamp1 = RTTimeMilliTS();
4233	int rc = VMMR3CallR0(pVM, VMMR0_DO_PGM_ALLOCATE_LARGE_HANDY_PAGE, 0, NULL);
4234	u64TimeStamp2 = RTTimeMilliTS();
4235	STAM_PROFILE_STOP(&pVM->pgm.s.CTX_SUFF(pStats)->StatAllocLargePage, a);
4236	if (RT_SUCCESS(rc))
4237	{
4238	Assert(pVM->pgm.s.cLargeHandyPages == 1);
4239
4240	uint32_t idPage = pVM->pgm.s.aLargeHandyPage[0].idPage;
4241	RTHCPHYS HCPhys = pVM->pgm.s.aLargeHandyPage[0].HCPhysGCPhys;
4242
4243	void *pv;
4244
4245	/* Map the large page into our address space.
4246	*
4247	* Note: assuming that within the 2 MB range:
4248	* - GCPhys + PAGE_SIZE = HCPhys + PAGE_SIZE (whole point of this exercise)
4249	* - user space mapping is continuous as well
4250	* - page id (GCPhys) + 1 = page id (GCPhys + PAGE_SIZE)
4251	*/
4252	rc = pgmPhysPageMapByPageID(pVM, idPage, HCPhys, &pv);
4253	AssertLogRelMsg(RT_SUCCESS(rc), ("idPage=%#x HCPhysGCPhys=%RHp rc=%Rrc\n", idPage, HCPhys, rc));
4254
4255	if (RT_SUCCESS(rc))
4256	{
4257	/*
4258	* Clear the pages.
4259	*/
4260	STAM_PROFILE_START(&pVM->pgm.s.CTX_SUFF(pStats)->StatClearLargePage, b);
4261	for (unsigned i = 0; i < _2M/PAGE_SIZE; i++)
4262	{
4263	ASMMemZeroPage(pv);
4264
4265	PPGMPAGE pPage;
4266	rc = pgmPhysGetPageEx(pVM, GCPhys, &pPage);
4267	AssertRC(rc);
4268
4269	Assert(PGM_PAGE_IS_ZERO(pPage));
4270	STAM_COUNTER_INC(&pVM->pgm.s.CTX_SUFF(pStats)->StatRZPageReplaceZero);
4271	pVM->pgm.s.cZeroPages--;
4272
4273	/*
4274	* Do the PGMPAGE modifications.
4275	*/
4276	pVM->pgm.s.cPrivatePages++;
4277	PGM_PAGE_SET_HCPHYS(pVM, pPage, HCPhys);
4278	PGM_PAGE_SET_PAGEID(pVM, pPage, idPage);
4279	PGM_PAGE_SET_STATE(pVM, pPage, PGM_PAGE_STATE_ALLOCATED);
4280	PGM_PAGE_SET_PDE_TYPE(pVM, pPage, PGM_PAGE_PDE_TYPE_PDE);
4281	PGM_PAGE_SET_PTE_INDEX(pVM, pPage, 0);
4282	PGM_PAGE_SET_TRACKING(pVM, pPage, 0);
4283
4284	/* Somewhat dirty assumption that page ids are increasing. */
4285	idPage++;
4286
4287	HCPhys += PAGE_SIZE;
4288	GCPhys += PAGE_SIZE;
4289
4290	pv = (void *)((uintptr_t)pv + PAGE_SIZE);
4291
4292	Log3(("PGMR3PhysAllocateLargePage: idPage=%#x HCPhys=%RGp\n", idPage, HCPhys));
4293	}
4294	STAM_PROFILE_STOP(&pVM->pgm.s.CTX_SUFF(pStats)->StatClearLargePage, b);
4295
4296	/* Flush all TLBs. */
4297	PGM_INVL_ALL_VCPU_TLBS(pVM);
4298	pgmPhysInvalidatePageMapTLB(pVM);
4299	}
4300	pVM->pgm.s.cLargeHandyPages = 0;
4301	}
4302
4303	if (RT_SUCCESS(rc))
4304	{
4305	static uint32_t cTimeOut = 0;
4306	uint64_t u64TimeStampDelta = u64TimeStamp2 - u64TimeStamp1;
4307
4308	if (u64TimeStampDelta > 100)
4309	{
4310	STAM_COUNTER_INC(&pVM->pgm.s.CTX_SUFF(pStats)->StatLargePageOverflow);
4311	if ( ++cTimeOut > 10
4312	\|\| u64TimeStampDelta > 1000 /* more than one second forces an early retirement from allocating large pages. */)
4313	{
4314	/* If repeated attempts to allocate a large page takes more than 100 ms, then we fall back to normal 4k pages.
4315	* E.g. Vista 64 tries to move memory around, which takes a huge amount of time.
4316	*/
4317	LogRel(("PGMR3PhysAllocateLargePage: allocating large pages takes too long (last attempt %d ms; nr of timeouts %d); DISABLE\n", u64TimeStampDelta, cTimeOut));
4318	PGMSetLargePageUsage(pVM, false);
4319	}
4320	}
4321	else
4322	if (cTimeOut > 0)
4323	cTimeOut--;
4324	}
4325
4326	pgmUnlock(pVM);
4327	return rc;
4328	#else
4329	return VERR_NOT_IMPLEMENTED;
4330	#endif /* PGM_WITH_LARGE_PAGES */
4331	}
4332
4333
4334	/**
4335	* Response to VM_FF_PGM_NEED_HANDY_PAGES and VMMCALLRING3_PGM_ALLOCATE_HANDY_PAGES.
4336	*
4337	* This function will also work the VM_FF_PGM_NO_MEMORY force action flag, to
4338	* signal and clear the out of memory condition. When contracted, this API is
4339	* used to try clear the condition when the user wants to resume.
4340	*
4341	* @returns The following VBox status codes.
4342	* @retval VINF_SUCCESS on success. FFs cleared.
4343	* @retval VINF_EM_NO_MEMORY if we're out of memory. The FF is not cleared in
4344	* this case and it gets accompanied by VM_FF_PGM_NO_MEMORY.
4345	*
4346	* @param pVM Pointer to the VM.
4347	*
4348	* @remarks The VINF_EM_NO_MEMORY status is for the benefit of the FF processing
4349	* in EM.cpp and shouldn't be propagated outside TRPM, HM, EM and
4350	* pgmPhysEnsureHandyPage. There is one exception to this in the \#PF
4351	* handler.
4352	*/
4353	VMMR3DECL(int) PGMR3PhysAllocateHandyPages(PVM pVM)
4354	{
4355	pgmLock(pVM);
4356
4357	/*
4358	* Allocate more pages, noting down the index of the first new page.
4359	*/
4360	uint32_t iClear = pVM->pgm.s.cHandyPages;
4361	AssertMsgReturn(iClear <= RT_ELEMENTS(pVM->pgm.s.aHandyPages), ("%d", iClear), VERR_PGM_HANDY_PAGE_IPE);
4362	Log(("PGMR3PhysAllocateHandyPages: %d -> %d\n", iClear, RT_ELEMENTS(pVM->pgm.s.aHandyPages)));
4363	int rcAlloc = VINF_SUCCESS;
4364	int rcSeed = VINF_SUCCESS;
4365	int rc = VMMR3CallR0(pVM, VMMR0_DO_PGM_ALLOCATE_HANDY_PAGES, 0, NULL);
4366	while (rc == VERR_GMM_SEED_ME)
4367	{
4368	void *pvChunk;
4369	rcAlloc = rc = SUPR3PageAlloc(GMM_CHUNK_SIZE >> PAGE_SHIFT, &pvChunk);
4370	if (RT_SUCCESS(rc))
4371	{
4372	rcSeed = rc = VMMR3CallR0(pVM, VMMR0_DO_GMM_SEED_CHUNK, (uintptr_t)pvChunk, NULL);
4373	if (RT_FAILURE(rc))
4374	SUPR3PageFree(pvChunk, GMM_CHUNK_SIZE >> PAGE_SHIFT);
4375	}
4376	if (RT_SUCCESS(rc))
4377	rc = VMMR3CallR0(pVM, VMMR0_DO_PGM_ALLOCATE_HANDY_PAGES, 0, NULL);
4378	}
4379
4380	/* todo: we should split this up into an allocate and flush operation. sometimes you want to flush and not allocate more (which will trigger the vm account limit error) */
4381	if ( rc == VERR_GMM_HIT_VM_ACCOUNT_LIMIT
4382	&& pVM->pgm.s.cHandyPages > 0)
4383	{
4384	/* Still handy pages left, so don't panic. */
4385	rc = VINF_SUCCESS;
4386	}
4387
4388	if (RT_SUCCESS(rc))
4389	{
4390	AssertMsg(rc == VINF_SUCCESS, ("%Rrc\n", rc));
4391	Assert(pVM->pgm.s.cHandyPages > 0);
4392	VM_FF_CLEAR(pVM, VM_FF_PGM_NEED_HANDY_PAGES);
4393	VM_FF_CLEAR(pVM, VM_FF_PGM_NO_MEMORY);
4394
4395	#ifdef VBOX_STRICT
4396	uint32_t i;
4397	for (i = iClear; i < pVM->pgm.s.cHandyPages; i++)
4398	if ( pVM->pgm.s.aHandyPages[i].idPage == NIL_GMM_PAGEID
4399	\|\| pVM->pgm.s.aHandyPages[i].idSharedPage != NIL_GMM_PAGEID
4400	\|\| (pVM->pgm.s.aHandyPages[i].HCPhysGCPhys & PAGE_OFFSET_MASK))
4401	break;
4402	if (i != pVM->pgm.s.cHandyPages)
4403	{
4404	RTAssertMsg1Weak(NULL, __LINE__, __FILE__, __FUNCTION__);
4405	RTAssertMsg2Weak("i=%d iClear=%d cHandyPages=%d\n", i, iClear, pVM->pgm.s.cHandyPages);
4406	for (uint32_t j = iClear; j < pVM->pgm.s.cHandyPages; j++)
4407	RTAssertMsg2Add(("%03d: idPage=%d HCPhysGCPhys=%RHp idSharedPage=%d%\n", j,
4408	pVM->pgm.s.aHandyPages[j].idPage,
4409	pVM->pgm.s.aHandyPages[j].HCPhysGCPhys,
4410	pVM->pgm.s.aHandyPages[j].idSharedPage,
4411	j == i ? " <---" : ""));
4412	RTAssertPanic();
4413	}
4414	#endif
4415	/*
4416	* Clear the pages.
4417	*/
4418	while (iClear < pVM->pgm.s.cHandyPages)
4419	{
4420	PGMMPAGEDESC pPage = &pVM->pgm.s.aHandyPages[iClear];
4421	void *pv;
4422	rc = pgmPhysPageMapByPageID(pVM, pPage->idPage, pPage->HCPhysGCPhys, &pv);
4423	AssertLogRelMsgBreak(RT_SUCCESS(rc),
4424	("%u/%u: idPage=%#x HCPhysGCPhys=%RHp rc=%Rrc\n",
4425	iClear, pVM->pgm.s.cHandyPages, pPage->idPage, pPage->HCPhysGCPhys, rc));
4426	ASMMemZeroPage(pv);
4427	iClear++;
4428	Log3(("PGMR3PhysAllocateHandyPages: idPage=%#x HCPhys=%RGp\n", pPage->idPage, pPage->HCPhysGCPhys));
4429	}
4430	}
4431	else
4432	{
4433	uint64_t cAllocPages, cMaxPages, cBalloonPages;
4434
4435	/*
4436	* We should never get here unless there is a genuine shortage of
4437	* memory (or some internal error). Flag the error so the VM can be
4438	* suspended ASAP and the user informed. If we're totally out of
4439	* handy pages we will return failure.
4440	*/
4441	/* Report the failure. */
4442	LogRel(("PGM: Failed to procure handy pages; rc=%Rrc rcAlloc=%Rrc rcSeed=%Rrc cHandyPages=%#x\n"
4443	" cAllPages=%#x cPrivatePages=%#x cSharedPages=%#x cZeroPages=%#x\n",
4444	rc, rcAlloc, rcSeed,
4445	pVM->pgm.s.cHandyPages,
4446	pVM->pgm.s.cAllPages,
4447	pVM->pgm.s.cPrivatePages,
4448	pVM->pgm.s.cSharedPages,
4449	pVM->pgm.s.cZeroPages));
4450
4451	if (GMMR3QueryMemoryStats(pVM, &cAllocPages, &cMaxPages, &cBalloonPages) == VINF_SUCCESS)
4452	{
4453	LogRel(("GMM: Statistics:\n"
4454	" Allocated pages: %RX64\n"
4455	" Maximum pages: %RX64\n"
4456	" Ballooned pages: %RX64\n", cAllocPages, cMaxPages, cBalloonPages));
4457	}
4458
4459	if ( rc != VERR_NO_MEMORY
4460	&& rc != VERR_NO_PHYS_MEMORY
4461	&& rc != VERR_LOCK_FAILED)
4462	{
4463	for (uint32_t i = 0; i < RT_ELEMENTS(pVM->pgm.s.aHandyPages); i++)
4464	{
4465	LogRel(("PGM: aHandyPages[#%#04x] = {.HCPhysGCPhys=%RHp, .idPage=%#08x, .idSharedPage=%#08x}\n",
4466	i, pVM->pgm.s.aHandyPages[i].HCPhysGCPhys, pVM->pgm.s.aHandyPages[i].idPage,
4467	pVM->pgm.s.aHandyPages[i].idSharedPage));
4468	uint32_t const idPage = pVM->pgm.s.aHandyPages[i].idPage;
4469	if (idPage != NIL_GMM_PAGEID)
4470	{
4471	for (PPGMRAMRANGE pRam = pVM->pgm.s.pRamRangesXR3;
4472	pRam;
4473	pRam = pRam->pNextR3)
4474	{
4475	uint32_t const cPages = pRam->cb >> PAGE_SHIFT;
4476	for (uint32_t iPage = 0; iPage < cPages; iPage++)
4477	if (PGM_PAGE_GET_PAGEID(&pRam->aPages[iPage]) == idPage)
4478	LogRel(("PGM: Used by %RGp %R[pgmpage] (%s)\n",
4479	pRam->GCPhys + ((RTGCPHYS)iPage << PAGE_SHIFT), &pRam->aPages[iPage], pRam->pszDesc));
4480	}
4481	}
4482	}
4483	}
4484
4485	/* Set the FFs and adjust rc. */
4486	VM_FF_SET(pVM, VM_FF_PGM_NEED_HANDY_PAGES);
4487	VM_FF_SET(pVM, VM_FF_PGM_NO_MEMORY);
4488	if ( rc == VERR_NO_MEMORY
4489	\|\| rc == VERR_NO_PHYS_MEMORY
4490	\|\| rc == VERR_LOCK_FAILED)
4491	rc = VINF_EM_NO_MEMORY;
4492	}
4493
4494	pgmUnlock(pVM);
4495	return rc;
4496	}
4497
4498
4499	/**
4500	* Frees the specified RAM page and replaces it with the ZERO page.
4501	*
4502	* This is used by ballooning, remapping MMIO2, RAM reset and state loading.
4503	*
4504	* @param pVM Pointer to the VM.
4505	* @param pReq Pointer to the request.
4506	* @param pcPendingPages Where the number of pages waiting to be freed are
4507	* kept. This will normally be incremented.
4508	* @param pPage Pointer to the page structure.
4509	* @param GCPhys The guest physical address of the page, if applicable.
4510	*
4511	* @remarks The caller must own the PGM lock.
4512	*/
4513	int pgmPhysFreePage(PVM pVM, PGMMFREEPAGESREQ pReq, uint32_t *pcPendingPages, PPGMPAGE pPage, RTGCPHYS GCPhys)
4514	{
4515	/*
4516	* Assert sanity.
4517	*/
4518	PGM_LOCK_ASSERT_OWNER(pVM);
4519	if (RT_UNLIKELY( PGM_PAGE_GET_TYPE(pPage) != PGMPAGETYPE_RAM
4520	&& PGM_PAGE_GET_TYPE(pPage) != PGMPAGETYPE_ROM_SHADOW))
4521	{
4522	AssertMsgFailed(("GCPhys=%RGp pPage=%R[pgmpage]\n", GCPhys, pPage));
4523	return VMSetError(pVM, VERR_PGM_PHYS_NOT_RAM, RT_SRC_POS, "GCPhys=%RGp type=%d", GCPhys, PGM_PAGE_GET_TYPE(pPage));
4524	}
4525
4526	/** @todo What about ballooning of large pages??! */
4527	Assert( PGM_PAGE_GET_PDE_TYPE(pPage) != PGM_PAGE_PDE_TYPE_PDE
4528	&& PGM_PAGE_GET_PDE_TYPE(pPage) != PGM_PAGE_PDE_TYPE_PDE_DISABLED);
4529
4530	if ( PGM_PAGE_IS_ZERO(pPage)
4531	\|\| PGM_PAGE_IS_BALLOONED(pPage))
4532	return VINF_SUCCESS;
4533
4534	const uint32_t idPage = PGM_PAGE_GET_PAGEID(pPage);
4535	Log3(("pgmPhysFreePage: idPage=%#x GCPhys=%RGp pPage=%R[pgmpage]\n", idPage, GCPhys, pPage));
4536	if (RT_UNLIKELY( idPage == NIL_GMM_PAGEID
4537	\|\| idPage > GMM_PAGEID_LAST
4538	\|\| PGM_PAGE_GET_CHUNKID(pPage) == NIL_GMM_CHUNKID))
4539	{
4540	AssertMsgFailed(("GCPhys=%RGp pPage=%R[pgmpage]\n", GCPhys, pPage));
4541	return VMSetError(pVM, VERR_PGM_PHYS_INVALID_PAGE_ID, RT_SRC_POS, "GCPhys=%RGp idPage=%#x", GCPhys, pPage);
4542	}
4543
4544	/* update page count stats. */
4545	if (PGM_PAGE_IS_SHARED(pPage))
4546	pVM->pgm.s.cSharedPages--;
4547	else
4548	pVM->pgm.s.cPrivatePages--;
4549	pVM->pgm.s.cZeroPages++;
4550
4551	/* Deal with write monitored pages. */
4552	if (PGM_PAGE_GET_STATE(pPage) == PGM_PAGE_STATE_WRITE_MONITORED)
4553	{
4554	PGM_PAGE_SET_WRITTEN_TO(pVM, pPage);
4555	pVM->pgm.s.cWrittenToPages++;
4556	}
4557
4558	/*
4559	* pPage = ZERO page.
4560	*/
4561	PGM_PAGE_SET_HCPHYS(pVM, pPage, pVM->pgm.s.HCPhysZeroPg);
4562	PGM_PAGE_SET_STATE(pVM, pPage, PGM_PAGE_STATE_ZERO);
4563	PGM_PAGE_SET_PAGEID(pVM, pPage, NIL_GMM_PAGEID);
4564	PGM_PAGE_SET_PDE_TYPE(pVM, pPage, PGM_PAGE_PDE_TYPE_DONTCARE);
4565	PGM_PAGE_SET_PTE_INDEX(pVM, pPage, 0);
4566	PGM_PAGE_SET_TRACKING(pVM, pPage, 0);
4567
4568	/* Flush physical page map TLB entry. */
4569	pgmPhysInvalidatePageMapTLBEntry(pVM, GCPhys);
4570
4571	/*
4572	* Make sure it's not in the handy page array.
4573	*/
4574	for (uint32_t i = pVM->pgm.s.cHandyPages; i < RT_ELEMENTS(pVM->pgm.s.aHandyPages); i++)
4575	{
4576	if (pVM->pgm.s.aHandyPages[i].idPage == idPage)
4577	{
4578	pVM->pgm.s.aHandyPages[i].idPage = NIL_GMM_PAGEID;
4579	break;
4580	}
4581	if (pVM->pgm.s.aHandyPages[i].idSharedPage == idPage)
4582	{
4583	pVM->pgm.s.aHandyPages[i].idSharedPage = NIL_GMM_PAGEID;
4584	break;
4585	}
4586	}
4587
4588	/*
4589	* Push it onto the page array.
4590	*/
4591	uint32_t iPage = *pcPendingPages;
4592	Assert(iPage < PGMPHYS_FREE_PAGE_BATCH_SIZE);
4593	*pcPendingPages += 1;
4594
4595	pReq->aPages[iPage].idPage = idPage;
4596
4597	if (iPage + 1 < PGMPHYS_FREE_PAGE_BATCH_SIZE)
4598	return VINF_SUCCESS;
4599
4600	/*
4601	* Flush the pages.
4602	*/
4603	int rc = GMMR3FreePagesPerform(pVM, pReq, PGMPHYS_FREE_PAGE_BATCH_SIZE);
4604	if (RT_SUCCESS(rc))
4605	{
4606	GMMR3FreePagesRePrep(pVM, pReq, PGMPHYS_FREE_PAGE_BATCH_SIZE, GMMACCOUNT_BASE);
4607	*pcPendingPages = 0;
4608	}
4609	return rc;
4610	}
4611
4612
4613	/**
4614	* Converts a GC physical address to a HC ring-3 pointer, with some
4615	* additional checks.
4616	*
4617	* @returns VBox status code.
4618	* @retval VINF_SUCCESS on success.
4619	* @retval VINF_PGM_PHYS_TLB_CATCH_WRITE and *ppv set if the page has a write
4620	* access handler of some kind.
4621	* @retval VERR_PGM_PHYS_TLB_CATCH_ALL if the page has a handler catching all
4622	* accesses or is odd in any way.
4623	* @retval VERR_PGM_PHYS_TLB_UNASSIGNED if the page doesn't exist.
4624	*
4625	* @param pVM Pointer to the VM.
4626	* @param GCPhys The GC physical address to convert. Since this is only
4627	* used for filling the REM TLB, the A20 mask must be
4628	* applied before calling this API.
4629	* @param fWritable Whether write access is required.
4630	* @param ppv Where to store the pointer corresponding to GCPhys on
4631	* success.
4632	*/
4633	VMMR3DECL(int) PGMR3PhysTlbGCPhys2Ptr(PVM pVM, RTGCPHYS GCPhys, bool fWritable, void **ppv)
4634	{
4635	pgmLock(pVM);
4636	PGM_A20_ASSERT_MASKED(VMMGetCpu(pVM), GCPhys);
4637
4638	PPGMRAMRANGE pRam;
4639	PPGMPAGE pPage;
4640	int rc = pgmPhysGetPageAndRangeEx(pVM, GCPhys, &pPage, &pRam);
4641	if (RT_SUCCESS(rc))
4642	{
4643	if (PGM_PAGE_IS_BALLOONED(pPage))
4644	rc = VINF_PGM_PHYS_TLB_CATCH_WRITE;
4645	else if (!PGM_PAGE_HAS_ANY_HANDLERS(pPage))
4646	rc = VINF_SUCCESS;
4647	else
4648	{
4649	if (PGM_PAGE_HAS_ACTIVE_ALL_HANDLERS(pPage)) /* catches MMIO */
4650	rc = VERR_PGM_PHYS_TLB_CATCH_ALL;
4651	else if (PGM_PAGE_HAS_ACTIVE_HANDLERS(pPage))
4652	{
4653	/** @todo Handle TLB loads of virtual handlers so ./test.sh can be made to work
4654	* in -norawr0 mode. */
4655	if (fWritable)
4656	rc = VINF_PGM_PHYS_TLB_CATCH_WRITE;
4657	}
4658	else
4659	{
4660	/* Temporarily disabled physical handler(s), since the recompiler
4661	doesn't get notified when it's reset we'll have to pretend it's
4662	operating normally. */
4663	if (pgmHandlerPhysicalIsAll(pVM, GCPhys))
4664	rc = VERR_PGM_PHYS_TLB_CATCH_ALL;
4665	else
4666	rc = VINF_PGM_PHYS_TLB_CATCH_WRITE;
4667	}
4668	}
4669	if (RT_SUCCESS(rc))
4670	{
4671	int rc2;
4672
4673	/* Make sure what we return is writable. */
4674	if (fWritable)
4675	switch (PGM_PAGE_GET_STATE(pPage))
4676	{
4677	case PGM_PAGE_STATE_ALLOCATED:
4678	break;
4679	case PGM_PAGE_STATE_BALLOONED:
4680	AssertFailed();
4681	break;
4682	case PGM_PAGE_STATE_ZERO:
4683	case PGM_PAGE_STATE_SHARED:
4684	if (rc == VINF_PGM_PHYS_TLB_CATCH_WRITE)
4685	break;
4686	case PGM_PAGE_STATE_WRITE_MONITORED:
4687	rc2 = pgmPhysPageMakeWritable(pVM, pPage, GCPhys & ~(RTGCPHYS)PAGE_OFFSET_MASK);
4688	AssertLogRelRCReturn(rc2, rc2);
4689	break;
4690	}
4691
4692	/* Get a ring-3 mapping of the address. */
4693	PPGMPAGER3MAPTLBE pTlbe;
4694	rc2 = pgmPhysPageQueryTlbe(pVM, GCPhys, &pTlbe);
4695	AssertLogRelRCReturn(rc2, rc2);
4696	ppv = (void )((uintptr_t)pTlbe->pv \| (uintptr_t)(GCPhys & PAGE_OFFSET_MASK));
4697	/** @todo mapping/locking hell; this isn't horribly efficient since
4698	* pgmPhysPageLoadIntoTlb will repeat the lookup we've done here. */
4699
4700	Log6(("PGMR3PhysTlbGCPhys2Ptr: GCPhys=%RGp rc=%Rrc pPage=%R[pgmpage] ppv=%p\n", GCPhys, rc, pPage, ppv));
4701	}
4702	else
4703	Log6(("PGMR3PhysTlbGCPhys2Ptr: GCPhys=%RGp rc=%Rrc pPage=%R[pgmpage]\n", GCPhys, rc, pPage));
4704
4705	/* else: handler catching all access, no pointer returned. */
4706	}
4707	else
4708	rc = VERR_PGM_PHYS_TLB_UNASSIGNED;
4709
4710	pgmUnlock(pVM);
4711	return rc;
4712	}
4713

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source: vbox/trunk/src/VBox/VMM/VMMR3/PGMPhys.cpp@ 45808

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